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-rw-r--r--drivers/base/node.c46
-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c8
-rw-r--r--drivers/char/misc.c2
-rw-r--r--drivers/char/vt.c6
-rw-r--r--drivers/cpuidle/cpuidle.c31
-rw-r--r--drivers/cpuidle/governors/menu.c23
-rw-r--r--drivers/dma/Kconfig20
-rw-r--r--drivers/dma/Makefile2
-rw-r--r--drivers/dma/at_hdmac.c4
-rw-r--r--drivers/dma/coh901318.c169
-rw-r--r--drivers/dma/dmatest.c2
-rw-r--r--drivers/dma/intel_mid_dma.c1143
-rw-r--r--drivers/dma/intel_mid_dma_regs.h260
-rw-r--r--drivers/dma/ioat/dma.h1
-rw-r--r--drivers/dma/ioat/dma_v2.c24
-rw-r--r--drivers/dma/ioat/dma_v3.c5
-rw-r--r--drivers/dma/pch_dma.c957
-rw-r--r--drivers/dma/ste_dma40.c860
-rw-r--r--drivers/dma/ste_dma40_ll.c40
-rw-r--r--drivers/dma/ste_dma40_ll.h15
-rw-r--r--drivers/dma/timb_dma.c8
-rw-r--r--drivers/firmware/edd.c20
-rw-r--r--drivers/gpu/drm/drm_crtc_helper.c16
-rw-r--r--drivers/hwmon/Kconfig34
-rw-r--r--drivers/hwmon/Makefile2
-rw-r--r--drivers/hwmon/coretemp.c26
-rw-r--r--drivers/hwmon/f71882fg.c83
-rw-r--r--drivers/hwmon/hdaps.c1
-rw-r--r--drivers/hwmon/jc42.c593
-rw-r--r--drivers/hwmon/smm665.c743
-rw-r--r--drivers/input/mouse/appletouch.c6
-rw-r--r--drivers/misc/Kconfig27
-rw-r--r--drivers/misc/Makefile3
-rw-r--r--drivers/misc/bh1780gli.c273
-rw-r--r--drivers/misc/bmp085.c482
-rw-r--r--drivers/misc/hmc6352.c166
-rw-r--r--drivers/misc/hpilo.c17
-rw-r--r--drivers/misc/hpilo.h8
-rw-r--r--drivers/pci/intel-iommu.c28
-rw-r--r--drivers/s390/block/dasd_eer.c2
-rw-r--r--drivers/s390/char/monreader.c2
-rw-r--r--drivers/s390/char/monwriter.c2
-rw-r--r--drivers/serial/crisv10.c11
-rw-r--r--drivers/video/w100fb.c4
44 files changed, 5709 insertions, 466 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 2bdd8a94ec9..2872e86837b 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -66,8 +66,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
struct sysinfo i;
si_meminfo_node(&i, nid);
-
- n = sprintf(buf, "\n"
+ n = sprintf(buf,
"Node %d MemTotal: %8lu kB\n"
"Node %d MemFree: %8lu kB\n"
"Node %d MemUsed: %8lu kB\n"
@@ -78,13 +77,33 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
"Node %d Active(file): %8lu kB\n"
"Node %d Inactive(file): %8lu kB\n"
"Node %d Unevictable: %8lu kB\n"
- "Node %d Mlocked: %8lu kB\n"
+ "Node %d Mlocked: %8lu kB\n",
+ nid, K(i.totalram),
+ nid, K(i.freeram),
+ nid, K(i.totalram - i.freeram),
+ nid, K(node_page_state(nid, NR_ACTIVE_ANON) +
+ node_page_state(nid, NR_ACTIVE_FILE)),
+ nid, K(node_page_state(nid, NR_INACTIVE_ANON) +
+ node_page_state(nid, NR_INACTIVE_FILE)),
+ nid, K(node_page_state(nid, NR_ACTIVE_ANON)),
+ nid, K(node_page_state(nid, NR_INACTIVE_ANON)),
+ nid, K(node_page_state(nid, NR_ACTIVE_FILE)),
+ nid, K(node_page_state(nid, NR_INACTIVE_FILE)),
+ nid, K(node_page_state(nid, NR_UNEVICTABLE)),
+ nid, K(node_page_state(nid, NR_MLOCK)));
+
#ifdef CONFIG_HIGHMEM
+ n += sprintf(buf + n,
"Node %d HighTotal: %8lu kB\n"
"Node %d HighFree: %8lu kB\n"
"Node %d LowTotal: %8lu kB\n"
- "Node %d LowFree: %8lu kB\n"
+ "Node %d LowFree: %8lu kB\n",
+ nid, K(i.totalhigh),
+ nid, K(i.freehigh),
+ nid, K(i.totalram - i.totalhigh),
+ nid, K(i.freeram - i.freehigh));
#endif
+ n += sprintf(buf + n,
"Node %d Dirty: %8lu kB\n"
"Node %d Writeback: %8lu kB\n"
"Node %d FilePages: %8lu kB\n"
@@ -99,25 +118,6 @@ static ssize_t node_read_meminfo(struct sys_device * dev,
"Node %d Slab: %8lu kB\n"
"Node %d SReclaimable: %8lu kB\n"
"Node %d SUnreclaim: %8lu kB\n",
- nid, K(i.totalram),
- nid, K(i.freeram),
- nid, K(i.totalram - i.freeram),
- nid, K(node_page_state(nid, NR_ACTIVE_ANON) +
- node_page_state(nid, NR_ACTIVE_FILE)),
- nid, K(node_page_state(nid, NR_INACTIVE_ANON) +
- node_page_state(nid, NR_INACTIVE_FILE)),
- nid, K(node_page_state(nid, NR_ACTIVE_ANON)),
- nid, K(node_page_state(nid, NR_INACTIVE_ANON)),
- nid, K(node_page_state(nid, NR_ACTIVE_FILE)),
- nid, K(node_page_state(nid, NR_INACTIVE_FILE)),
- nid, K(node_page_state(nid, NR_UNEVICTABLE)),
- nid, K(node_page_state(nid, NR_MLOCK)),
-#ifdef CONFIG_HIGHMEM
- nid, K(i.totalhigh),
- nid, K(i.freehigh),
- nid, K(i.totalram - i.totalhigh),
- nid, K(i.freeram - i.freehigh),
-#endif
nid, K(node_page_state(nid, NR_FILE_DIRTY)),
nid, K(node_page_state(nid, NR_WRITEBACK)),
nid, K(node_page_state(nid, NR_FILE_PAGES)),
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 094bdc355b1..ff68e7c34ce 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -2176,6 +2176,14 @@ static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
info->io.addr_data = res->start;
info->io.regspacing = DEFAULT_REGSPACING;
+ res = pnp_get_resource(dev,
+ (info->io.addr_type == IPMI_IO_ADDR_SPACE) ?
+ IORESOURCE_IO : IORESOURCE_MEM,
+ 1);
+ if (res) {
+ if (res->start > info->io.addr_data)
+ info->io.regspacing = res->start - info->io.addr_data;
+ }
info->io.regsize = DEFAULT_REGSPACING;
info->io.regshift = 0;
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index cd650ca8c67..abdafd48898 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -242,7 +242,7 @@ int misc_deregister(struct miscdevice *misc)
{
int i = DYNAMIC_MINORS - misc->minor - 1;
- if (list_empty(&misc->list))
+ if (WARN_ON(list_empty(&misc->list)))
return -EINVAL;
mutex_lock(&misc_mtx);
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 4a9eb3044e5..44f03ddd887 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -837,9 +837,10 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
unsigned int cols, unsigned int lines)
{
unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
+ unsigned long end;
unsigned int old_cols, old_rows, old_row_size, old_screen_size;
unsigned int new_cols, new_rows, new_row_size, new_screen_size;
- unsigned int end, user;
+ unsigned int user;
unsigned short *newscreen;
WARN_CONSOLE_UNLOCKED();
@@ -3065,7 +3066,8 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
old_was_color = vc->vc_can_do_color;
vc->vc_sw->con_deinit(vc);
- vc->vc_origin = (unsigned long)vc->vc_screenbuf;
+ if (!vc->vc_origin)
+ vc->vc_origin = (unsigned long)vc->vc_screenbuf;
visual_init(vc, i, 0);
set_origin(vc);
update_attr(vc);
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index dbefe15bd58..a5071084337 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -74,6 +74,17 @@ static void cpuidle_idle_call(void)
*/
hrtimer_peek_ahead_timers();
#endif
+
+ /*
+ * Call the device's prepare function before calling the
+ * governor's select function. ->prepare gives the device's
+ * cpuidle driver a chance to update any dynamic information
+ * of its cpuidle states for the current idle period, e.g.
+ * state availability, latencies, residencies, etc.
+ */
+ if (dev->prepare)
+ dev->prepare(dev);
+
/* ask the governor for the next state */
next_state = cpuidle_curr_governor->select(dev);
if (need_resched()) {
@@ -282,6 +293,26 @@ static int __cpuidle_register_device(struct cpuidle_device *dev)
poll_idle_init(dev);
+ /*
+ * cpuidle driver should set the dev->power_specified bit
+ * before registering the device if the driver provides
+ * power_usage numbers.
+ *
+ * For those devices whose ->power_specified is not set,
+ * we fill in power_usage with decreasing values as the
+ * cpuidle code has an implicit assumption that state Cn
+ * uses less power than C(n-1).
+ *
+ * With CONFIG_ARCH_HAS_CPU_RELAX, C0 is already assigned
+ * an power value of -1. So we use -2, -3, etc, for other
+ * c-states.
+ */
+ if (!dev->power_specified) {
+ int i;
+ for (i = CPUIDLE_DRIVER_STATE_START; i < dev->state_count; i++)
+ dev->states[i].power_usage = -1 - i;
+ }
+
per_cpu(cpuidle_devices, dev->cpu) = dev;
list_add(&dev->device_list, &cpuidle_detected_devices);
if ((ret = cpuidle_add_sysfs(sys_dev))) {
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index 1b128702d30..c2408bbe9c2 100644
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -234,6 +234,7 @@ static int menu_select(struct cpuidle_device *dev)
{
struct menu_device *data = &__get_cpu_var(menu_devices);
int latency_req = pm_qos_request(PM_QOS_CPU_DMA_LATENCY);
+ unsigned int power_usage = -1;
int i;
int multiplier;
@@ -278,19 +279,27 @@ static int menu_select(struct cpuidle_device *dev)
if (data->expected_us > 5)
data->last_state_idx = CPUIDLE_DRIVER_STATE_START;
-
- /* find the deepest idle state that satisfies our constraints */
+ /*
+ * Find the idle state with the lowest power while satisfying
+ * our constraints.
+ */
for (i = CPUIDLE_DRIVER_STATE_START; i < dev->state_count; i++) {
struct cpuidle_state *s = &dev->states[i];
+ if (s->flags & CPUIDLE_FLAG_IGNORE)
+ continue;
if (s->target_residency > data->predicted_us)
- break;
+ continue;
if (s->exit_latency > latency_req)
- break;
+ continue;
if (s->exit_latency * multiplier > data->predicted_us)
- break;
- data->exit_us = s->exit_latency;
- data->last_state_idx = i;
+ continue;
+
+ if (s->power_usage < power_usage) {
+ power_usage = s->power_usage;
+ data->last_state_idx = i;
+ data->exit_us = s->exit_latency;
+ }
}
return data->last_state_idx;
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 9e01e96fee9..fed57634b6c 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -33,6 +33,19 @@ if DMADEVICES
comment "DMA Devices"
+config INTEL_MID_DMAC
+ tristate "Intel MID DMA support for Peripheral DMA controllers"
+ depends on PCI && X86
+ select DMA_ENGINE
+ default n
+ help
+ Enable support for the Intel(R) MID DMA engine present
+ in Intel MID chipsets.
+
+ Say Y here if you have such a chipset.
+
+ If unsure, say N.
+
config ASYNC_TX_DISABLE_CHANNEL_SWITCH
bool
@@ -175,6 +188,13 @@ config PL330_DMA
You need to provide platform specific settings via
platform_data for a dma-pl330 device.
+config PCH_DMA
+ tristate "Topcliff PCH DMA support"
+ depends on PCI && X86
+ select DMA_ENGINE
+ help
+ Enable support for the Topcliff PCH DMA engine.
+
config DMA_ENGINE
bool
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 0fe5ebbfda5..72bd70384d8 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -7,6 +7,7 @@ endif
obj-$(CONFIG_DMA_ENGINE) += dmaengine.o
obj-$(CONFIG_NET_DMA) += iovlock.o
+obj-$(CONFIG_INTEL_MID_DMAC) += intel_mid_dma.o
obj-$(CONFIG_DMATEST) += dmatest.o
obj-$(CONFIG_INTEL_IOATDMA) += ioat/
obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
@@ -23,3 +24,4 @@ obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/
obj-$(CONFIG_TIMB_DMA) += timb_dma.o
obj-$(CONFIG_STE_DMA40) += ste_dma40.o ste_dma40_ll.o
obj-$(CONFIG_PL330_DMA) += pl330.o
+obj-$(CONFIG_PCH_DMA) += pch_dma.o
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index e88076022a7..a0f3e6a06e0 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -790,12 +790,12 @@ static int atc_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
list_splice_init(&atchan->queue, &list);
list_splice_init(&atchan->active_list, &list);
- spin_unlock_bh(&atchan->lock);
-
/* Flush all pending and queued descriptors */
list_for_each_entry_safe(desc, _desc, &list, desc_node)
atc_chain_complete(atchan, desc);
+ spin_unlock_bh(&atchan->lock);
+
return 0;
}
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index a724e6be1b4..557e2272e5b 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -72,6 +72,9 @@ struct coh901318_chan {
unsigned long nbr_active_done;
unsigned long busy;
+ u32 runtime_addr;
+ u32 runtime_ctrl;
+
struct coh901318_base *base;
};
@@ -190,6 +193,9 @@ static inline struct coh901318_chan *to_coh901318_chan(struct dma_chan *chan)
static inline dma_addr_t
cohc_dev_addr(struct coh901318_chan *cohc)
{
+ /* Runtime supplied address will take precedence */
+ if (cohc->runtime_addr)
+ return cohc->runtime_addr;
return cohc->base->platform->chan_conf[cohc->id].dev_addr;
}
@@ -1055,6 +1061,14 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
params = cohc_chan_param(cohc);
config = params->config;
+ /*
+ * Add runtime-specific control on top, make
+ * sure the bits you set per peripheral channel are
+ * cleared in the default config from the platform.
+ */
+ ctrl_chained |= cohc->runtime_ctrl;
+ ctrl_last |= cohc->runtime_ctrl;
+ ctrl |= cohc->runtime_ctrl;
if (direction == DMA_TO_DEVICE) {
u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE |
@@ -1113,6 +1127,12 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (ret)
goto err_lli_fill;
+ /*
+ * Set the default ctrl for the channel to the one from the lli,
+ * things may have changed due to odd buffer alignment etc.
+ */
+ coh901318_set_ctrl(cohc, lli->control);
+
COH_DBG(coh901318_list_print(cohc, lli));
/* Pick a descriptor to handle this transfer */
@@ -1175,6 +1195,146 @@ coh901318_issue_pending(struct dma_chan *chan)
spin_unlock_irqrestore(&cohc->lock, flags);
}
+/*
+ * Here we wrap in the runtime dma control interface
+ */
+struct burst_table {
+ int burst_8bit;
+ int burst_16bit;
+ int burst_32bit;
+ u32 reg;
+};
+
+static const struct burst_table burst_sizes[] = {
+ {
+ .burst_8bit = 64,
+ .burst_16bit = 32,
+ .burst_32bit = 16,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_64_BYTES,
+ },
+ {
+ .burst_8bit = 48,
+ .burst_16bit = 24,
+ .burst_32bit = 12,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_48_BYTES,
+ },
+ {
+ .burst_8bit = 32,
+ .burst_16bit = 16,
+ .burst_32bit = 8,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_32_BYTES,
+ },
+ {
+ .burst_8bit = 16,
+ .burst_16bit = 8,
+ .burst_32bit = 4,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_16_BYTES,
+ },
+ {
+ .burst_8bit = 8,
+ .burst_16bit = 4,
+ .burst_32bit = 2,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_8_BYTES,
+ },
+ {
+ .burst_8bit = 4,
+ .burst_16bit = 2,
+ .burst_32bit = 1,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_4_BYTES,
+ },
+ {
+ .burst_8bit = 2,
+ .burst_16bit = 1,
+ .burst_32bit = 0,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_2_BYTES,
+ },
+ {
+ .burst_8bit = 1,
+ .burst_16bit = 0,
+ .burst_32bit = 0,
+ .reg = COH901318_CX_CTRL_BURST_COUNT_1_BYTE,
+ },
+};
+
+static void coh901318_dma_set_runtimeconfig(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct coh901318_chan *cohc = to_coh901318_chan(chan);
+ dma_addr_t addr;
+ enum dma_slave_buswidth addr_width;
+ u32 maxburst;
+ u32 runtime_ctrl = 0;
+ int i = 0;
+
+ /* We only support mem to per or per to mem transfers */
+ if (config->direction == DMA_FROM_DEVICE) {
+ addr = config->src_addr;
+ addr_width = config->src_addr_width;
+ maxburst = config->src_maxburst;
+ } else if (config->direction == DMA_TO_DEVICE) {
+ addr = config->dst_addr;
+ addr_width = config->dst_addr_width;
+ maxburst = config->dst_maxburst;
+ } else {
+ dev_err(COHC_2_DEV(cohc), "illegal channel mode\n");
+ return;
+ }
+
+ dev_dbg(COHC_2_DEV(cohc), "configure channel for %d byte transfers\n",
+ addr_width);
+ switch (addr_width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ runtime_ctrl |=
+ COH901318_CX_CTRL_SRC_BUS_SIZE_8_BITS |
+ COH901318_CX_CTRL_DST_BUS_SIZE_8_BITS;
+
+ while (i < ARRAY_SIZE(burst_sizes)) {
+ if (burst_sizes[i].burst_8bit <= maxburst)
+ break;
+ i++;
+ }
+
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ runtime_ctrl |=
+ COH901318_CX_CTRL_SRC_BUS_SIZE_16_BITS |
+ COH901318_CX_CTRL_DST_BUS_SIZE_16_BITS;
+
+ while (i < ARRAY_SIZE(burst_sizes)) {
+ if (burst_sizes[i].burst_16bit <= maxburst)
+ break;
+ i++;
+ }
+
+ break;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ /* Direction doesn't matter here, it's 32/32 bits */
+ runtime_ctrl |=
+ COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS |
+ COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS;
+
+ while (i < ARRAY_SIZE(burst_sizes)) {
+ if (burst_sizes[i].burst_32bit <= maxburst)
+ break;
+ i++;
+ }
+
+ break;
+ default:
+ dev_err(COHC_2_DEV(cohc),
+ "bad runtimeconfig: alien address width\n");
+ return;
+ }
+
+ runtime_ctrl |= burst_sizes[i].reg;
+ dev_dbg(COHC_2_DEV(cohc),
+ "selected burst size %d bytes for address width %d bytes, maxburst %d\n",
+ burst_sizes[i].burst_8bit, addr_width, maxburst);
+
+ cohc->runtime_addr = addr;
+ cohc->runtime_ctrl = runtime_ctrl;
+}
+
static int
coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
@@ -1184,6 +1344,14 @@ coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
struct coh901318_desc *cohd;
void __iomem *virtbase = cohc->base->virtbase;
+ if (cmd == DMA_SLAVE_CONFIG) {
+ struct dma_slave_config *config =
+ (struct dma_slave_config *) arg;
+
+ coh901318_dma_set_runtimeconfig(chan, config);
+ return 0;
+ }
+
if (cmd == DMA_PAUSE) {
coh901318_pause(chan);
return 0;
@@ -1240,6 +1408,7 @@ coh901318_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
return 0;
}
+
void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
struct coh901318_base *base)
{
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 68d58c414cf..5589358b684 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -540,7 +540,7 @@ static int dmatest_add_channel(struct dma_chan *chan)
struct dmatest_chan *dtc;
struct dma_device *dma_dev = chan->device;
unsigned int thread_count = 0;
- unsigned int cnt;
+ int cnt;
dtc = kmalloc(sizeof(struct dmatest_chan), GFP_KERNEL);
if (!dtc) {
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
new file mode 100644
index 00000000000..c2591e8d9b6
--- /dev/null
+++ b/drivers/dma/intel_mid_dma.c
@@ -0,0 +1,1143 @@
+/*
+ * intel_mid_dma.c - Intel Langwell DMA Drivers
+ *
+ * Copyright (C) 2008-10 Intel Corp
+ * Author: Vinod Koul <vinod.koul@intel.com>
+ * The driver design is based on dw_dmac driver
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *
+ */
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/intel_mid_dma.h>
+
+#define MAX_CHAN 4 /*max ch across controllers*/
+#include "intel_mid_dma_regs.h"
+
+#define INTEL_MID_DMAC1_ID 0x0814
+#define INTEL_MID_DMAC2_ID 0x0813
+#define INTEL_MID_GP_DMAC2_ID 0x0827
+#define INTEL_MFLD_DMAC1_ID 0x0830
+#define LNW_PERIPHRAL_MASK_BASE 0xFFAE8008
+#define LNW_PERIPHRAL_MASK_SIZE 0x10
+#define LNW_PERIPHRAL_STATUS 0x0
+#define LNW_PERIPHRAL_MASK 0x8
+
+struct intel_mid_dma_probe_info {
+ u8 max_chan;
+ u8 ch_base;
+ u16 block_size;
+ u32 pimr_mask;
+};
+
+#define INFO(_max_chan, _ch_base, _block_size, _pimr_mask) \
+ ((kernel_ulong_t)&(struct intel_mid_dma_probe_info) { \
+ .max_chan = (_max_chan), \
+ .ch_base = (_ch_base), \
+ .block_size = (_block_size), \
+ .pimr_mask = (_pimr_mask), \
+ })
+
+/*****************************************************************************
+Utility Functions*/
+/**
+ * get_ch_index - convert status to channel
+ * @status: status mask
+ * @base: dma ch base value
+ *
+ * Modify the status mask and return the channel index needing
+ * attention (or -1 if neither)
+ */
+static int get_ch_index(int *status, unsigned int base)
+{
+ int i;
+ for (i = 0; i < MAX_CHAN; i++) {
+ if (*status & (1 << (i + base))) {
+ *status = *status & ~(1 << (i + base));
+ pr_debug("MDMA: index %d New status %x\n", i, *status);
+ return i;
+ }
+ }
+ return -1;
+}
+
+/**
+ * get_block_ts - calculates dma transaction length
+ * @len: dma transfer length
+ * @tx_width: dma transfer src width
+ * @block_size: dma controller max block size
+ *
+ * Based on src width calculate the DMA trsaction length in data items
+ * return data items or FFFF if exceeds max length for block
+ */
+static int get_block_ts(int len, int tx_width, int block_size)
+{
+ int byte_width = 0, block_ts = 0;
+
+ switch (tx_width) {
+ case LNW_DMA_WIDTH_8BIT:
+ byte_width = 1;
+ break;
+ case LNW_DMA_WIDTH_16BIT:
+ byte_width = 2;
+ break;
+ case LNW_DMA_WIDTH_32BIT:
+ default:
+ byte_width = 4;
+ break;
+ }
+
+ block_ts = len/byte_width;
+ if (block_ts > block_size)
+ block_ts = 0xFFFF;
+ return block_ts;
+}
+
+/*****************************************************************************
+DMAC1 interrupt Functions*/
+
+/**
+ * dmac1_mask_periphral_intr - mask the periphral interrupt
+ * @midc: dma channel for which masking is required
+ *
+ * Masks the DMA periphral interrupt
+ * this is valid for DMAC1 family controllers only
+ * This controller should have periphral mask registers already mapped
+ */
+static void dmac1_mask_periphral_intr(struct intel_mid_dma_chan *midc)
+{
+ u32 pimr;
+ struct middma_device *mid = to_middma_device(midc->chan.device);
+
+ if (mid->pimr_mask) {
+ pimr = readl(mid->mask_reg + LNW_PERIPHRAL_MASK);
+ pimr |= mid->pimr_mask;
+ writel(pimr, mid->mask_reg + LNW_PERIPHRAL_MASK);
+ }
+ return;
+}
+
+/**
+ * dmac1_unmask_periphral_intr - unmask the periphral interrupt
+ * @midc: dma channel for which masking is required
+ *
+ * UnMasks the DMA periphral interrupt,
+ * this is valid for DMAC1 family controllers only
+ * This controller should have periphral mask registers already mapped
+ */
+static void dmac1_unmask_periphral_intr(struct intel_mid_dma_chan *midc)
+{
+ u32 pimr;
+ struct middma_device *mid = to_middma_device(midc->chan.device);
+
+ if (mid->pimr_mask) {
+ pimr = readl(mid->mask_reg + LNW_PERIPHRAL_MASK);
+ pimr &= ~mid->pimr_mask;
+ writel(pimr, mid->mask_reg + LNW_PERIPHRAL_MASK);
+ }
+ return;
+}
+
+/**
+ * enable_dma_interrupt - enable the periphral interrupt
+ * @midc: dma channel for which enable interrupt is required
+ *
+ * Enable the DMA periphral interrupt,
+ * this is valid for DMAC1 family controllers only
+ * This controller should have periphral mask registers already mapped
+ */
+static void enable_dma_interrupt(struct intel_mid_dma_chan *midc)
+{
+ dmac1_unmask_periphral_intr(midc);
+
+ /*en ch interrupts*/
+ iowrite32(UNMASK_INTR_REG(midc->ch_id), midc->dma_base + MASK_TFR);
+ iowrite32(UNMASK_INTR_REG(midc->ch_id), midc->dma_base + MASK_ERR);
+ return;
+}
+
+/**
+ * disable_dma_interrupt - disable the periphral interrupt
+ * @midc: dma channel for which disable interrupt is required
+ *
+ * Disable the DMA periphral interrupt,
+ * this is valid for DMAC1 family controllers only
+ * This controller should have periphral mask registers already mapped
+ */
+static void disable_dma_interrupt(struct intel_mid_dma_chan *midc)
+{
+ /*Check LPE PISR, make sure fwd is disabled*/
+ dmac1_mask_periphral_intr(midc);
+ iowrite32(MASK_INTR_REG(midc->ch_id), midc->dma_base + MASK_BLOCK);
+ iowrite32(MASK_INTR_REG(midc->ch_id), midc->dma_base + MASK_TFR);
+ iowrite32(MASK_INTR_REG(midc->ch_id), midc->dma_base + MASK_ERR);
+ return;
+}
+
+/*****************************************************************************
+DMA channel helper Functions*/
+/**
+ * mid_desc_get - get a descriptor
+ * @midc: dma channel for which descriptor is required
+ *
+ * Obtain a descriptor for the channel. Returns NULL if none are free.
+ * Once the descriptor is returned it is private until put on another
+ * list or freed
+ */
+static struct intel_mid_dma_desc *midc_desc_get(struct intel_mid_dma_chan *midc)
+{
+ struct intel_mid_dma_desc *desc, *_desc;
+ struct intel_mid_dma_desc *ret = NULL;
+
+ spin_lock_bh(&midc->lock);
+ list_for_each_entry_safe(desc, _desc, &midc->free_list, desc_node) {
+ if (async_tx_test_ack(&desc->txd)) {
+ list_del(&desc->desc_node);
+ ret = desc;
+ break;
+ }
+ }
+ spin_unlock_bh(&midc->lock);
+ return ret;
+}
+
+/**
+ * mid_desc_put - put a descriptor
+ * @midc: dma channel for which descriptor is required
+ * @desc: descriptor to put
+ *
+ * Return a descriptor from lwn_desc_get back to the free pool
+ */
+static void midc_desc_put(struct intel_mid_dma_chan *midc,
+ struct intel_mid_dma_desc *desc)
+{
+ if (desc) {
+ spin_lock_bh(&midc->lock);
+ list_add_tail(&desc->desc_node, &midc->free_list);
+ spin_unlock_bh(&midc->lock);
+ }
+}
+/**
+ * midc_dostart - begin a DMA transaction
+ * @midc: channel for which txn is to be started
+ * @first: first descriptor of series
+ *
+ * Load a transaction into the engine. This must be called with midc->lock
+ * held and bh disabled.
+ */
+static void midc_dostart(struct intel_mid_dma_chan *midc,
+ struct intel_mid_dma_desc *first)
+{
+ struct middma_device *mid = to_middma_device(midc->chan.device);
+
+ /* channel is idle */
+ if (midc->in_use && test_ch_en(midc->dma_base, midc->ch_id)) {
+ /*error*/
+ pr_err("ERR_MDMA: channel is busy in start\n");
+ /* The tasklet will hopefully advance the queue... */
+ return;
+ }
+
+ /*write registers and en*/
+ iowrite32(first->sar, midc->ch_regs + SAR);
+ iowrite32(first->dar, midc->ch_regs + DAR);
+ iowrite32(first->cfg_hi, midc->ch_regs + CFG_HIGH);
+ iowrite32(first->cfg_lo, midc->ch_regs + CFG_LOW);
+ iowrite32(first->ctl_lo, midc->ch_regs + CTL_LOW);
+ iowrite32(first->ctl_hi, midc->ch_regs + CTL_HIGH);
+ pr_debug("MDMA:TX SAR %x,DAR %x,CFGL %x,CFGH %x,CTLH %x, CTLL %x\n",
+ (int)first->sar, (int)first->dar, first->cfg_hi,
+ first->cfg_lo, first->ctl_hi, first->ctl_lo);
+
+ iowrite32(ENABLE_CHANNEL(midc->ch_id), mid->dma_base + DMA_CHAN_EN);
+ first->status = DMA_IN_PROGRESS;
+}
+
+/**
+ * midc_descriptor_complete - process completed descriptor
+ * @midc: channel owning the descriptor
+ * @desc: the descriptor itself
+ *
+ * Process a completed descriptor and perform any callbacks upon
+ * the completion. The completion handling drops the lock during the
+ * callbacks but must be called with the lock held.
+ */
+static void midc_descriptor_complete(struct intel_mid_dma_chan *midc,
+ struct intel_mid_dma_desc *desc)
+{
+ struct dma_async_tx_descriptor *txd = &desc->txd;
+ dma_async_tx_callback callback_txd = NULL;
+ void *param_txd = NULL;
+
+ midc->completed = txd->cookie;
+ callback_txd = txd->callback;
+ param_txd = txd->callback_param;
+
+ list_move(&desc->desc_node, &midc->free_list);
+
+ spin_unlock_bh(&midc->lock);
+ if (callback_txd) {
+ pr_debug("MDMA: TXD callback set ... calling\n");
+ callback_txd(param_txd);
+ spin_lock_bh(&midc->lock);
+ return;
+ }
+ spin_lock_bh(&midc->lock);
+
+}
+/**
+ * midc_scan_descriptors - check the descriptors in channel
+ * mark completed when tx is completete
+ * @mid: device
+ * @midc: channel to scan
+ *
+ * Walk the descriptor chain for the device and process any entries
+ * that are complete.
+ */
+static void midc_scan_descriptors(struct middma_device *mid,
+ struct intel_mid_dma_chan *midc)
+{
+ struct intel_mid_dma_desc *desc = NULL, *_desc = NULL;
+
+ /*tx is complete*/
+ list_for_each_entry_safe(desc, _desc, &midc->active_list, desc_node) {
+ if (desc->status == DMA_IN_PROGRESS) {
+ desc->status = DMA_SUCCESS;
+ midc_descriptor_complete(midc, desc);
+ }
+ }
+ return;
+}
+
+/*****************************************************************************
+DMA engine callback Functions*/
+/**
+ * intel_mid_dma_tx_submit - callback to submit DMA transaction
+ * @tx: dma engine descriptor
+ *
+ * Submit the DMA trasaction for this descriptor, start if ch idle
+ */
+static dma_cookie_t intel_mid_dma_tx_submit(struct dma_async_tx_descriptor *tx)
+{
+ struct intel_mid_dma_desc *desc = to_intel_mid_dma_desc(tx);
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(tx->chan);
+ dma_cookie_t cookie;
+
+ spin_lock_bh(&midc->lock);
+ cookie = midc->chan.cookie;
+
+ if (++cookie < 0)
+ cookie = 1;
+
+ midc->chan.cookie = cookie;
+ desc->txd.cookie = cookie;
+
+
+ if (list_empty(&midc->active_list)) {
+ midc_dostart(midc, desc);
+ list_add_tail(&desc->desc_node, &midc->active_list);
+ } else {
+ list_add_tail(&desc->desc_node, &midc->queue);
+ }
+ spin_unlock_bh(&midc->lock);
+
+ return cookie;
+}
+
+/**
+ * intel_mid_dma_issue_pending - callback to issue pending txn
+ * @chan: chan where pending trascation needs to be checked and submitted
+ *
+ * Call for scan to issue pending descriptors
+ */
+static void intel_mid_dma_issue_pending(struct dma_chan *chan)
+{
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
+
+ spin_lock_bh(&midc->lock);
+ if (!list_empty(&midc->queue))
+ midc_scan_descriptors(to_middma_device(chan->device), midc);
+ spin_unlock_bh(&midc->lock);
+}
+
+/**
+ * intel_mid_dma_tx_status - Return status of txn
+ * @chan: chan for where status needs to be checked
+ * @cookie: cookie for txn
+ * @txstate: DMA txn state
+ *
+ * Return status of DMA txn
+ */
+static enum dma_status intel_mid_dma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
+ dma_cookie_t last_used;
+ dma_cookie_t last_complete;
+ int ret;
+
+ last_complete = midc->completed;
+ last_used = chan->cookie;
+
+ ret = dma_async_is_complete(cookie, last_complete, last_used);
+ if (ret != DMA_SUCCESS) {
+ midc_scan_descriptors(to_middma_device(chan->device), midc);
+
+ last_complete = midc->completed;
+ last_used = chan->cookie;
+
+ ret = dma_async_is_complete(cookie, last_complete, last_used);
+ }
+
+ if (txstate) {
+ txstate->last = last_complete;
+ txstate->used = last_used;
+ txstate->residue = 0;
+ }
+ return ret;
+}
+
+/**
+ * intel_mid_dma_device_control - DMA device control
+ * @chan: chan for DMA control
+ * @cmd: control cmd
+ * @arg: cmd arg value
+ *
+ * Perform DMA control command
+ */
+static int intel_mid_dma_device_control(struct dma_chan *chan,
+ enum dma_ctrl_cmd cmd, unsigned long arg)
+{
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
+ struct middma_device *mid = to_middma_device(chan->device);
+ struct intel_mid_dma_desc *desc, *_desc;
+ LIST_HEAD(list);
+
+ if (cmd != DMA_TERMINATE_ALL)
+ return -ENXIO;
+
+ spin_lock_bh(&midc->lock);
+ if (midc->in_use == false) {
+ spin_unlock_bh(&midc->lock);
+ return 0;
+ }
+ list_splice_init(&midc->free_list, &list);
+ midc->descs_allocated = 0;
+ midc->slave = NULL;
+
+ /* Disable interrupts */
+ disable_dma_interrupt(midc);
+
+ spin_unlock_bh(&midc->lock);
+ list_for_each_entry_safe(desc, _desc, &list, desc_node) {
+ pr_debug("MDMA: freeing descriptor %p\n", desc);
+ pci_pool_free(mid->dma_pool, desc, desc->txd.phys);
+ }
+ return 0;
+}
+
+/**
+ * intel_mid_dma_prep_slave_sg - Prep slave sg txn
+ * @chan: chan for DMA transfer
+ * @sgl: scatter gather list
+ * @sg_len: length of sg txn
+ * @direction: DMA transfer dirtn
+ * @flags: DMA flags
+ *
+ * Do DMA sg txn: NOT supported now
+ */
+static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg(
+ struct dma_chan *chan, struct scatterlist *sgl,
+ unsigned int sg_len, enum dma_data_direction direction,
+ unsigned long flags)
+{
+ /*not supported now*/
+ return NULL;
+}
+
+/**
+ * intel_mid_dma_prep_memcpy - Prep memcpy txn
+ * @chan: chan for DMA transfer
+ * @dest: destn address
+ * @src: src address
+ * @len: DMA transfer len
+ * @flags: DMA flags
+ *
+ * Perform a DMA memcpy. Note we support slave periphral DMA transfers only
+ * The periphral txn details should be filled in slave structure properly
+ * Returns the descriptor for this txn
+ */
+static struct dma_async_tx_descriptor *intel_mid_dma_prep_memcpy(
+ struct dma_chan *chan, dma_addr_t dest,
+ dma_addr_t src, size_t len, unsigned long flags)
+{
+ struct intel_mid_dma_chan *midc;
+ struct intel_mid_dma_desc *desc = NULL;
+ struct intel_mid_dma_slave *mids;
+ union intel_mid_dma_ctl_lo ctl_lo;
+ union intel_mid_dma_ctl_hi ctl_hi;
+ union intel_mid_dma_cfg_lo cfg_lo;
+ union intel_mid_dma_cfg_hi cfg_hi;
+ enum intel_mid_dma_width width = 0;
+
+ pr_debug("MDMA: Prep for memcpy\n");
+ WARN_ON(!chan);
+ if (!len)
+ return NULL;
+
+ mids = chan->private;
+ WARN_ON(!mids);
+
+ midc = to_intel_mid_dma_chan(chan);
+ WARN_ON(!midc);
+
+ pr_debug("MDMA:called for DMA %x CH %d Length %zu\n",
+ midc->dma->pci_id, midc->ch_id, len);
+ pr_debug("MDMA:Cfg passed Mode %x, Dirn %x, HS %x, Width %x\n",
+ mids->cfg_mode, mids->dirn, mids->hs_mode, mids->src_width);
+
+ /*calculate CFG_LO*/
+ if (mids->hs_mode == LNW_DMA_SW_HS) {
+ cfg_lo.cfg_lo = 0;
+ cfg_lo.cfgx.hs_sel_dst = 1;
+ cfg_lo.cfgx.hs_sel_src = 1;
+ } else if (mids->hs_mode == LNW_DMA_HW_HS)
+ cfg_lo.cfg_lo = 0x00000;
+
+ /*calculate CFG_HI*/
+ if (mids->cfg_mode == LNW_DMA_MEM_TO_MEM) {
+ /*SW HS only*/
+ cfg_hi.cfg_hi = 0;
+ } else {
+ cfg_hi.cfg_hi = 0;
+ if (midc->dma->pimr_mask) {
+ cfg_hi.cfgx.protctl = 0x0; /*default value*/
+ cfg_hi.cfgx.fifo_mode = 1;
+ if (mids->dirn == DMA_TO_DEVICE) {
+ cfg_hi.cfgx.src_per = 0;
+ if (mids->device_instance == 0)
+ cfg_hi.cfgx.dst_per = 3;
+ if (mids->device_instance == 1)
+ cfg_hi.cfgx.dst_per = 1;
+ } else if (mids->dirn == DMA_FROM_DEVICE) {
+ if (mids->device_instance == 0)
+ cfg_hi.cfgx.src_per = 2;
+ if (mids->device_instance == 1)
+ cfg_hi.cfgx.src_per = 0;
+ cfg_hi.cfgx.dst_per = 0;
+ }
+ } else {
+ cfg_hi.cfgx.protctl = 0x1; /*default value*/
+ cfg_hi.cfgx.src_per = cfg_hi.cfgx.dst_per =
+ midc->ch_id - midc->dma->chan_base;
+ }
+ }
+
+ /*calculate CTL_HI*/
+ ctl_hi.ctlx.reser = 0;
+ width = mids->src_width;
+
+ ctl_hi.ctlx.block_ts = get_block_ts(len, width, midc->dma->block_size);
+ pr_debug("MDMA:calc len %d for block size %d\n",
+ ctl_hi.ctlx.block_ts, midc->dma->block_size);
+ /*calculate CTL_LO*/
+ ctl_lo.ctl_lo = 0;
+ ctl_lo.ctlx.int_en = 1;
+ ctl_lo.ctlx.dst_tr_width = mids->dst_width;
+ ctl_lo.ctlx.src_tr_width = mids->src_width;
+ ctl_lo.ctlx.dst_msize = mids->src_msize;
+ ctl_lo.ctlx.src_msize = mids->dst_msize;
+
+ if (mids->cfg_mode == LNW_DMA_MEM_TO_MEM) {
+ ctl_lo.ctlx.tt_fc = 0;
+ ctl_lo.ctlx.sinc = 0;
+ ctl_lo.ctlx.dinc = 0;
+ } else {
+ if (mids->dirn == DMA_TO_DEVICE) {
+ ctl_lo.ctlx.sinc = 0;
+ ctl_lo.ctlx.dinc = 2;
+ ctl_lo.ctlx.tt_fc = 1;
+ } else if (mids->dirn == DMA_FROM_DEVICE) {
+ ctl_lo.ctlx.sinc = 2;
+ ctl_lo.ctlx.dinc = 0;
+ ctl_lo.ctlx.tt_fc = 2;
+ }
+ }
+
+ pr_debug("MDMA:Calc CTL LO %x, CTL HI %x, CFG LO %x, CFG HI %x\n",
+ ctl_lo.ctl_lo, ctl_hi.ctl_hi, cfg_lo.cfg_lo, cfg_hi.cfg_hi);
+
+ enable_dma_interrupt(midc);
+
+ desc = midc_desc_get(midc);
+ if (desc == NULL)
+ goto err_desc_get;
+ desc->sar = src;
+ desc->dar = dest ;
+ desc->len = len;
+ desc->cfg_hi = cfg_hi.cfg_hi;
+ desc->cfg_lo = cfg_lo.cfg_lo;
+ desc->ctl_lo = ctl_lo.ctl_lo;
+ desc->ctl_hi = ctl_hi.ctl_hi;
+ desc->width = width;
+ desc->dirn = mids->dirn;
+ return &desc->txd;
+
+err_desc_get:
+ pr_err("ERR_MDMA: Failed to get desc\n");
+ midc_desc_put(midc, desc);
+ return NULL;
+}
+
+/**
+ * intel_mid_dma_free_chan_resources - Frees dma resources
+ * @chan: chan requiring attention
+ *
+ * Frees the allocated resources on this DMA chan
+ */
+static void intel_mid_dma_free_chan_resources(struct dma_chan *chan)
+{
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
+ struct middma_device *mid = to_middma_device(chan->device);
+ struct intel_mid_dma_desc *desc, *_desc;
+
+ if (true == midc->in_use) {
+ /*trying to free ch in use!!!!!*/
+ pr_err("ERR_MDMA: trying to free ch in use\n");
+ }
+
+ spin_lock_bh(&midc->lock);
+ midc->descs_allocated = 0;
+ list_for_each_entry_safe(desc, _desc, &midc->active_list, desc_node) {
+ list_del(&desc->desc_node);
+ pci_pool_free(mid->dma_pool, desc, desc->txd.phys);
+ }
+ list_for_each_entry_safe(desc, _desc, &midc->free_list, desc_node) {
+ list_del(&desc->desc_node);
+ pci_pool_free(mid->dma_pool, desc, desc->txd.phys);
+ }
+ list_for_each_entry_safe(desc, _desc, &midc->queue, desc_node) {
+ list_del(&desc->desc_node);
+ pci_pool_free(mid->dma_pool, desc, desc->txd.phys);
+ }
+ spin_unlock_bh(&midc->lock);
+ midc->in_use = false;
+ /* Disable CH interrupts */
+ iowrite32(MASK_INTR_REG(midc->ch_id), mid->dma_base + MASK_BLOCK);
+ iowrite32(MASK_INTR_REG(midc->ch_id), mid->dma_base + MASK_ERR);
+}
+
+/**
+ * intel_mid_dma_alloc_chan_resources - Allocate dma resources
+ * @chan: chan requiring attention
+ *
+ * Allocates DMA resources on this chan
+ * Return the descriptors allocated
+ */
+static int intel_mid_dma_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
+ struct middma_device *mid = to_middma_device(chan->device);
+ struct intel_mid_dma_desc *desc;
+ dma_addr_t phys;
+ int i = 0;
+
+
+ /* ASSERT: channel is idle */
+ if (test_ch_en(mid->dma_base, midc->ch_id)) {
+ /*ch is not idle*/
+ pr_err("ERR_MDMA: ch not idle\n");
+ return -EIO;
+ }
+ midc->completed = chan->cookie = 1;
+
+ spin_lock_bh(&midc->lock);
+ while (midc->descs_allocated < DESCS_PER_CHANNEL) {
+ spin_unlock_bh(&midc->lock);
+ desc = pci_pool_alloc(mid->dma_pool, GFP_KERNEL, &phys);
+ if (!desc) {
+ pr_err("ERR_MDMA: desc failed\n");
+ return -ENOMEM;
+ /*check*/
+ }
+ dma_async_tx_descriptor_init(&desc->txd, chan);
+ desc->txd.tx_submit = intel_mid_dma_tx_submit;
+ desc->txd.flags = DMA_CTRL_ACK;
+ desc->txd.phys = phys;
+ spin_lock_bh(&midc->lock);
+ i = ++midc->descs_allocated;
+ list_add_tail(&desc->desc_node, &midc->free_list);
+ }
+ spin_unlock_bh(&midc->lock);
+ midc->in_use = false;
+ pr_debug("MID_DMA: Desc alloc done ret: %d desc\n", i);
+ return i;
+}
+
+/**
+ * midc_handle_error - Handle DMA txn error
+ * @mid: controller where error occured
+ * @midc: chan where error occured
+ *
+ * Scan the descriptor for error
+ */
+static void midc_handle_error(struct middma_device *mid,
+ struct intel_mid_dma_chan *midc)
+{
+ midc_scan_descriptors(mid, midc);
+}
+
+/**
+ * dma_tasklet - DMA interrupt tasklet
+ * @data: tasklet arg (the controller structure)
+ *
+ * Scan the controller for interrupts for completion/error
+ * Clear the interrupt and call for handling completion/error
+ */
+static void dma_tasklet(unsigned long data)
+{
+ struct middma_device *mid = NULL;
+ struct intel_mid_dma_chan *midc = NULL;
+ u32 status;
+ int i;
+
+ mid = (struct middma_device *)data;
+ if (mid == NULL) {
+ pr_err("ERR_MDMA: tasklet Null param\n");
+ return;
+ }
+ pr_debug("MDMA: in tasklet for device %x\n", mid->pci_id);
+ status = ioread32(mid->dma_base + RAW_TFR);
+ pr_debug("MDMA:RAW_TFR %x\n", status);
+ status &= mid->intr_mask;
+ while (status) {
+ /*txn interrupt*/
+ i = get_ch_index(&status, mid->chan_base);
+ if (i < 0) {
+ pr_err("ERR_MDMA:Invalid ch index %x\n", i);
+ return;
+ }
+ midc = &mid->ch[i];
+ if (midc == NULL) {
+ pr_err("ERR_MDMA:Null param midc\n");
+ return;
+ }
+ pr_debug("MDMA:Tx complete interrupt %x, Ch No %d Index %d\n",
+ status, midc->ch_id, i);
+ /*clearing this interrupts first*/
+ iowrite32((1 << midc->ch_id), mid->dma_base + CLEAR_TFR);
+ iowrite32((1 << midc->ch_id), mid->dma_base + CLEAR_BLOCK);
+
+ spin_lock_bh(&midc->lock);
+ midc_scan_descriptors(mid, midc);
+ pr_debug("MDMA:Scan of desc... complete, unmasking\n");
+ iowrite32(UNMASK_INTR_REG(midc->ch_id),
+ mid->dma_base + MASK_TFR);
+ spin_unlock_bh(&midc->lock);
+ }
+
+ status = ioread32(mid->dma_base + RAW_ERR);
+ status &= mid->intr_mask;
+ while (status) {
+ /*err interrupt*/
+ i = get_ch_index(&status, mid->chan_base);
+ if (i < 0) {
+ pr_err("ERR_MDMA:Invalid ch index %x\n", i);
+ return;
+ }
+ midc = &mid->ch[i];
+ if (midc == NULL) {
+ pr_err("ERR_MDMA:Null param midc\n");
+ return;
+ }
+ pr_debug("MDMA:Tx complete interrupt %x, Ch No %d Index %d\n",
+ status, midc->ch_id, i);
+
+ iowrite32((1 << midc->ch_id), mid->dma_base + CLEAR_ERR);
+ spin_lock_bh(&midc->lock);
+ midc_handle_error(mid, midc);
+ iowrite32(UNMASK_INTR_REG(midc->ch_id),
+ mid->dma_base + MASK_ERR);
+ spin_unlock_bh(&midc->lock);
+ }
+ pr_debug("MDMA:Exiting takslet...\n");
+ return;
+}
+
+static void dma_tasklet1(unsigned long data)
+{
+ pr_debug("MDMA:in takslet1...\n");
+ return dma_tasklet(data);
+}
+
+static void dma_tasklet2(unsigned long data)
+{
+ pr_debug("MDMA:in takslet2...\n");
+ return dma_tasklet(data);
+}
+
+/**
+ * intel_mid_dma_interrupt - DMA ISR
+ * @irq: IRQ where interrupt occurred
+ * @data: ISR cllback data (the controller structure)
+ *
+ * See if this is our interrupt if so then schedule the tasklet
+ * otherwise ignore
+ */
+static irqreturn_t intel_mid_dma_interrupt(int irq, void *data)
+{
+ struct middma_device *mid = data;
+ u32 status;
+ int call_tasklet = 0;
+
+ /*DMA Interrupt*/
+ pr_debug("MDMA:Got an interrupt on irq %d\n", irq);
+ if (!mid) {
+ pr_err("ERR_MDMA:null pointer mid\n");
+ return -EINVAL;
+ }
+
+ status = ioread32(mid->dma_base + RAW_TFR);
+ pr_debug("MDMA: Status %x, Mask %x\n", status, mid->intr_mask);
+ status &= mid->intr_mask;
+ if (status) {
+ /*need to disable intr*/
+ iowrite32((status << 8), mid->dma_base + MASK_TFR);
+ pr_debug("MDMA: Calling tasklet %x\n", status);
+ call_tasklet = 1;
+ }
+ status = ioread32(mid->dma_base + RAW_ERR);
+ status &= mid->intr_mask;
+ if (status) {
+ iowrite32(MASK_INTR_REG(status), mid->dma_base + MASK_ERR);
+ call_tasklet = 1;
+ }
+ if (call_tasklet)
+ tasklet_schedule(&mid->tasklet);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t intel_mid_dma_interrupt1(int irq, void *data)
+{
+ return intel_mid_dma_interrupt(irq, data);
+}
+
+static irqreturn_t intel_mid_dma_interrupt2(int irq, void *data)
+{
+ return intel_mid_dma_interrupt(irq, data);
+}
+
+/**
+ * mid_setup_dma - Setup the DMA controller
+ * @pdev: Controller PCI device structure
+ *
+ * Initilize the DMA controller, channels, registers with DMA engine,
+ * ISR. Initilize DMA controller channels.
+ */
+static int mid_setup_dma(struct pci_dev *pdev)
+{
+ struct middma_device *dma = pci_get_drvdata(pdev);
+ int err, i;
+ unsigned int irq_level;
+
+ /* DMA coherent memory pool for DMA descriptor allocations */
+ dma->dma_pool = pci_pool_create("intel_mid_dma_desc_pool", pdev,
+ sizeof(struct intel_mid_dma_desc),
+ 32, 0);
+ if (NULL == dma->dma_pool) {
+ pr_err("ERR_MDMA:pci_pool_create failed\n");
+ err = -ENOMEM;
+ kfree(dma);
+ goto err_dma_pool;
+ }
+
+ INIT_LIST_HEAD(&dma->common.channels);
+ dma->pci_id = pdev->device;
+ if (dma->pimr_mask) {
+ dma->mask_reg = ioremap(LNW_PERIPHRAL_MASK_BASE,
+ LNW_PERIPHRAL_MASK_SIZE);
+ if (dma->mask_reg == NULL) {
+ pr_err("ERR_MDMA:Cant map periphral intr space !!\n");
+ return -ENOMEM;
+ }
+ } else
+ dma->mask_reg = NULL;
+
+ pr_debug("MDMA:Adding %d channel for this controller\n", dma->max_chan);
+ /*init CH structures*/
+ dma->intr_mask = 0;
+ for (i = 0; i < dma->max_chan; i++) {
+ struct intel_mid_dma_chan *midch = &dma->ch[i];
+
+ midch->chan.device = &dma->common;
+ midch->chan.cookie = 1;
+ midch->chan.chan_id = i;
+ midch->ch_id = dma->chan_base + i;
+ pr_debug("MDMA:Init CH %d, ID %d\n", i, midch->ch_id);
+
+ midch->dma_base = dma->dma_base;
+ midch->ch_regs = dma->dma_base + DMA_CH_SIZE * midch->ch_id;
+ midch->dma = dma;
+ dma->intr_mask |= 1 << (dma->chan_base + i);
+ spin_lock_init(&midch->lock);
+
+ INIT_LIST_HEAD(&midch->active_list);
+ INIT_LIST_HEAD(&midch->queue);
+ INIT_LIST_HEAD(&midch->free_list);
+ /*mask interrupts*/
+ iowrite32(MASK_INTR_REG(midch->ch_id),
+ dma->dma_base + MASK_BLOCK);
+ iowrite32(MASK_INTR_REG(midch->ch_id),
+ dma->dma_base + MASK_SRC_TRAN);
+ iowrite32(MASK_INTR_REG(midch->ch_id),
+ dma->dma_base + MASK_DST_TRAN);
+ iowrite32(MASK_INTR_REG(midch->ch_id),
+ dma->dma_base + MASK_ERR);
+ iowrite32(MASK_INTR_REG(midch->ch_id),
+ dma->dma_base + MASK_TFR);
+
+ disable_dma_interrupt(midch);
+ list_add_tail(&midch->chan.device_node, &dma->common.channels);
+ }
+ pr_debug("MDMA: Calc Mask as %x for this controller\n", dma->intr_mask);
+
+ /*init dma structure*/
+ dma_cap_zero(dma->common.cap_mask);
+ dma_cap_set(DMA_MEMCPY, dma->common.cap_mask);
+ dma_cap_set(DMA_SLAVE, dma->common.cap_mask);
+ dma_cap_set(DMA_PRIVATE, dma->common.cap_mask);
+ dma->common.dev = &pdev->dev;
+ dma->common.chancnt = dma->max_chan;
+
+ dma->common.device_alloc_chan_resources =
+ intel_mid_dma_alloc_chan_resources;
+ dma->common.device_free_chan_resources =
+ intel_mid_dma_free_chan_resources;
+
+ dma->common.device_tx_status = intel_mid_dma_tx_status;
+ dma->common.device_prep_dma_memcpy = intel_mid_dma_prep_memcpy;
+ dma->common.device_issue_pending = intel_mid_dma_issue_pending;
+ dma->common.device_prep_slave_sg = intel_mid_dma_prep_slave_sg;
+ dma->common.device_control = intel_mid_dma_device_control;
+
+ /*enable dma cntrl*/
+ iowrite32(REG_BIT0, dma->dma_base + DMA_CFG);
+
+ /*register irq */
+ if (dma->pimr_mask) {
+ irq_level = IRQF_SHARED;
+ pr_debug("MDMA:Requesting irq shared for DMAC1\n");
+ err = request_irq(pdev->irq, intel_mid_dma_interrupt1,
+ IRQF_SHARED, "INTEL_MID_DMAC1", dma);
+ if (0 != err)
+ goto err_irq;
+ } else {
+ dma->intr_mask = 0x03;
+ irq_level = 0;
+ pr_debug("MDMA:Requesting irq for DMAC2\n");
+ err = request_irq(pdev->irq, intel_mid_dma_interrupt2,
+ 0, "INTEL_MID_DMAC2", dma);
+ if (0 != err)
+ goto err_irq;
+ }
+ /*register device w/ engine*/
+ err = dma_async_device_register(&dma->common);
+ if (0 != err) {
+ pr_err("ERR_MDMA:device_register failed: %d\n", err);
+ goto err_engine;
+ }
+ if (dma->pimr_mask) {
+ pr_debug("setting up tasklet1 for DMAC1\n");
+ tasklet_init(&dma->tasklet, dma_tasklet1, (unsigned long)dma);
+ } else {
+ pr_debug("setting up tasklet2 for DMAC2\n");
+ tasklet_init(&dma->tasklet, dma_tasklet2, (unsigned long)dma);
+ }
+ return 0;
+
+err_engine:
+ free_irq(pdev->irq, dma);
+err_irq:
+ pci_pool_destroy(dma->dma_pool);
+ kfree(dma);
+err_dma_pool:
+ pr_err("ERR_MDMA:setup_dma failed: %d\n", err);
+ return err;
+
+}
+
+/**
+ * middma_shutdown - Shutdown the DMA controller
+ * @pdev: Controller PCI device structure
+ *
+ * Called by remove
+ * Unregister DMa controller, clear all structures and free interrupt
+ */
+static void middma_shutdown(struct pci_dev *pdev)
+{
+ struct middma_device *device = pci_get_drvdata(pdev);
+
+ dma_async_device_unregister(&device->common);
+ pci_pool_destroy(device->dma_pool);
+ if (device->mask_reg)
+ iounmap(device->mask_reg);
+ if (device->dma_base)
+ iounmap(device->dma_base);
+ free_irq(pdev->irq, device);
+ return;
+}
+
+/**
+ * intel_mid_dma_probe - PCI Probe
+ * @pdev: Controller PCI device structure
+ * @id: pci device id structure
+ *
+ * Initilize the PCI device, map BARs, query driver data.
+ * Call setup_dma to complete contoller and chan initilzation
+ */
+static int __devinit intel_mid_dma_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct middma_device *device;
+ u32 base_addr, bar_size;
+ struct intel_mid_dma_probe_info *info;
+ int err;
+
+ pr_debug("MDMA: probe for %x\n", pdev->device);
+ info = (void *)id->driver_data;
+ pr_debug("MDMA: CH %d, base %d, block len %d, Periphral mask %x\n",
+ info->max_chan, info->ch_base,
+ info->block_size, info->pimr_mask);
+
+ err = pci_enable_device(pdev);
+ if (err)
+ goto err_enable_device;
+
+ err = pci_request_regions(pdev, "intel_mid_dmac");
+ if (err)
+ goto err_request_regions;
+
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (err)
+ goto err_set_dma_mask;
+
+ err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (err)
+ goto err_set_dma_mask;
+
+ device = kzalloc(sizeof(*device), GFP_KERNEL);
+ if (!device) {
+ pr_err("ERR_MDMA:kzalloc failed probe\n");
+ err = -ENOMEM;
+ goto err_kzalloc;
+ }
+ device->pdev = pci_dev_get(pdev);
+
+ base_addr = pci_resource_start(pdev, 0);
+ bar_size = pci_resource_len(pdev, 0);
+ device->dma_base = ioremap_nocache(base_addr, DMA_REG_SIZE);
+ if (!device->dma_base) {
+ pr_err("ERR_MDMA:ioremap failed\n");
+ err = -ENOMEM;
+ goto err_ioremap;
+ }
+ pci_set_drvdata(pdev, device);
+ pci_set_master(pdev);
+ device->max_chan = info->max_chan;
+ device->chan_base = info->ch_base;
+ device->block_size = info->block_size;
+ device->pimr_mask = info->pimr_mask;
+
+ err = mid_setup_dma(pdev);
+ if (err)
+ goto err_dma;
+
+ return 0;
+
+err_dma:
+ iounmap(device->dma_base);
+err_ioremap:
+ pci_dev_put(pdev);
+ kfree(device);
+err_kzalloc:
+err_set_dma_mask:
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+err_request_regions:
+err_enable_device:
+ pr_err("ERR_MDMA:Probe failed %d\n", err);
+ return err;
+}
+
+/**
+ * intel_mid_dma_remove - PCI remove
+ * @pdev: Controller PCI device structure
+ *
+ * Free up all resources and data
+ * Call shutdown_dma to complete contoller and chan cleanup
+ */
+static void __devexit intel_mid_dma_remove(struct pci_dev *pdev)
+{
+ struct middma_device *device = pci_get_drvdata(pdev);
+ middma_shutdown(pdev);
+ pci_dev_put(pdev);
+ kfree(device);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/******************************************************************************
+* PCI stuff
+*/
+static struct pci_device_id intel_mid_dma_ids[] = {
+ { PCI_VDEVICE(INTEL, INTEL_MID_DMAC1_ID), INFO(2, 6, 4095, 0x200020)},
+ { PCI_VDEVICE(INTEL, INTEL_MID_DMAC2_ID), INFO(2, 0, 2047, 0)},
+ { PCI_VDEVICE(INTEL, INTEL_MID_GP_DMAC2_ID), INFO(2, 0, 2047, 0)},
+ { PCI_VDEVICE(INTEL, INTEL_MFLD_DMAC1_ID), INFO(4, 0, 4095, 0x400040)},
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, intel_mid_dma_ids);
+
+static struct pci_driver intel_mid_dma_pci = {
+ .name = "Intel MID DMA",
+ .id_table = intel_mid_dma_ids,
+ .probe = intel_mid_dma_probe,
+ .remove = __devexit_p(intel_mid_dma_remove),
+};
+
+static int __init intel_mid_dma_init(void)
+{
+ pr_debug("INFO_MDMA: LNW DMA Driver Version %s\n",
+ INTEL_MID_DMA_DRIVER_VERSION);
+ return pci_register_driver(&intel_mid_dma_pci);
+}
+fs_initcall(intel_mid_dma_init);
+
+static void __exit intel_mid_dma_exit(void)
+{
+ pci_unregister_driver(&intel_mid_dma_pci);
+}
+module_exit(intel_mid_dma_exit);
+
+MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
+MODULE_DESCRIPTION("Intel (R) MID DMAC Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(INTEL_MID_DMA_DRIVER_VERSION);
diff --git a/drivers/dma/intel_mid_dma_regs.h b/drivers/dma/intel_mid_dma_regs.h
new file mode 100644
index 00000000000..d81aa658ab0
--- /dev/null
+++ b/drivers/dma/intel_mid_dma_regs.h
@@ -0,0 +1,260 @@
+/*
+ * intel_mid_dma_regs.h - Intel MID DMA Drivers
+ *
+ * Copyright (C) 2008-10 Intel Corp
+ * Author: Vinod Koul <vinod.koul@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *
+ */
+#ifndef __INTEL_MID_DMAC_REGS_H__
+#define __INTEL_MID_DMAC_REGS_H__
+
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/pci_ids.h>
+
+#define INTEL_MID_DMA_DRIVER_VERSION "1.0.5"
+
+#define REG_BIT0 0x00000001
+#define REG_BIT8 0x00000100
+
+#define UNMASK_INTR_REG(chan_num) \
+ ((REG_BIT0 << chan_num) | (REG_BIT8 << chan_num))
+#define MASK_INTR_REG(chan_num) (REG_BIT8 << chan_num)
+
+#define ENABLE_CHANNEL(chan_num) \
+ ((REG_BIT0 << chan_num) | (REG_BIT8 << chan_num))
+
+#define DESCS_PER_CHANNEL 16
+/*DMA Registers*/
+/*registers associated with channel programming*/
+#define DMA_REG_SIZE 0x400
+#define DMA_CH_SIZE 0x58
+
+/*CH X REG = (DMA_CH_SIZE)*CH_NO + REG*/
+#define SAR 0x00 /* Source Address Register*/
+#define DAR 0x08 /* Destination Address Register*/
+#define CTL_LOW 0x18 /* Control Register*/
+#define CTL_HIGH 0x1C /* Control Register*/
+#define CFG_LOW 0x40 /* Configuration Register Low*/
+#define CFG_HIGH 0x44 /* Configuration Register high*/
+
+#define STATUS_TFR 0x2E8
+#define STATUS_BLOCK 0x2F0
+#define STATUS_ERR 0x308
+
+#define RAW_TFR 0x2C0
+#define RAW_BLOCK 0x2C8
+#define RAW_ERR 0x2E0
+
+#define MASK_TFR 0x310
+#define MASK_BLOCK 0x318
+#define MASK_SRC_TRAN 0x320
+#define MASK_DST_TRAN 0x328
+#define MASK_ERR 0x330
+
+#define CLEAR_TFR 0x338
+#define CLEAR_BLOCK 0x340
+#define CLEAR_SRC_TRAN 0x348
+#define CLEAR_DST_TRAN 0x350
+#define CLEAR_ERR 0x358
+
+#define INTR_STATUS 0x360
+#define DMA_CFG 0x398
+#define DMA_CHAN_EN 0x3A0
+
+/*DMA channel control registers*/
+union intel_mid_dma_ctl_lo {
+ struct {
+ u32 int_en:1; /*enable or disable interrupts*/
+ /*should be 0*/
+ u32 dst_tr_width:3; /*destination transfer width*/
+ /*usually 32 bits = 010*/
+ u32 src_tr_width:3; /*source transfer width*/
+ /*usually 32 bits = 010*/
+ u32 dinc:2; /*destination address inc/dec*/
+ /*For mem:INC=00, Periphral NoINC=11*/
+ u32 sinc:2; /*source address inc or dec, as above*/
+ u32 dst_msize:3; /*destination burst transaction length*/
+ /*always = 16 ie 011*/
+ u32 src_msize:3; /*source burst transaction length*/
+ /*always = 16 ie 011*/
+ u32 reser1:3;
+ u32 tt_fc:3; /*transfer type and flow controller*/
+ /*M-M = 000
+ P-M = 010
+ M-P = 001*/
+ u32 dms:2; /*destination master select = 0*/
+ u32 sms:2; /*source master select = 0*/
+ u32 llp_dst_en:1; /*enable/disable destination LLP = 0*/
+ u32 llp_src_en:1; /*enable/disable source LLP = 0*/
+ u32 reser2:3;
+ } ctlx;
+ u32 ctl_lo;
+};
+
+union intel_mid_dma_ctl_hi {
+ struct {
+ u32 block_ts:12; /*block transfer size*/
+ /*configured by DMAC*/
+ u32 reser:20;
+ } ctlx;
+ u32 ctl_hi;
+
+};
+
+/*DMA channel configuration registers*/
+union intel_mid_dma_cfg_lo {
+ struct {
+ u32 reser1:5;
+ u32 ch_prior:3; /*channel priority = 0*/
+ u32 ch_susp:1; /*channel suspend = 0*/
+ u32 fifo_empty:1; /*FIFO empty or not R bit = 0*/
+ u32 hs_sel_dst:1; /*select HW/SW destn handshaking*/
+ /*HW = 0, SW = 1*/
+ u32 hs_sel_src:1; /*select HW/SW src handshaking*/
+ u32 reser2:6;
+ u32 dst_hs_pol:1; /*dest HS interface polarity*/
+ u32 src_hs_pol:1; /*src HS interface polarity*/
+ u32 max_abrst:10; /*max AMBA burst len = 0 (no sw limit*/
+ u32 reload_src:1; /*auto reload src addr =1 if src is P*/
+ u32 reload_dst:1; /*AR destn addr =1 if dstn is P*/
+ } cfgx;
+ u32 cfg_lo;
+};
+
+union intel_mid_dma_cfg_hi {
+ struct {
+ u32 fcmode:1; /*flow control mode = 1*/
+ u32 fifo_mode:1; /*FIFO mode select = 1*/
+ u32 protctl:3; /*protection control = 0*/
+ u32 rsvd:2;
+ u32 src_per:4; /*src hw HS interface*/
+ u32 dst_per:4; /*dstn hw HS interface*/
+ u32 reser2:17;
+ } cfgx;
+ u32 cfg_hi;
+};
+
+/**
+ * struct intel_mid_dma_chan - internal mid representation of a DMA channel
+ * @chan: dma_chan strcture represetation for mid chan
+ * @ch_regs: MMIO register space pointer to channel register
+ * @dma_base: MMIO register space DMA engine base pointer
+ * @ch_id: DMA channel id
+ * @lock: channel spinlock
+ * @completed: DMA cookie
+ * @active_list: current active descriptors
+ * @queue: current queued up descriptors
+ * @free_list: current free descriptors
+ * @slave: dma slave struture
+ * @descs_allocated: total number of decsiptors allocated
+ * @dma: dma device struture pointer
+ * @in_use: bool representing if ch is in use or not
+ */
+struct intel_mid_dma_chan {
+ struct dma_chan chan;
+ void __iomem *ch_regs;
+ void __iomem *dma_base;
+ int ch_id;
+ spinlock_t lock;
+ dma_cookie_t completed;
+ struct list_head active_list;
+ struct list_head queue;
+ struct list_head free_list;
+ struct intel_mid_dma_slave *slave;
+ unsigned int descs_allocated;
+ struct middma_device *dma;
+ bool in_use;
+};
+
+static inline struct intel_mid_dma_chan *to_intel_mid_dma_chan(
+ struct dma_chan *chan)
+{
+ return container_of(chan, struct intel_mid_dma_chan, chan);
+}
+
+/**
+ * struct middma_device - internal representation of a DMA device
+ * @pdev: PCI device
+ * @dma_base: MMIO register space pointer of DMA
+ * @dma_pool: for allocating DMA descriptors
+ * @common: embedded struct dma_device
+ * @tasklet: dma tasklet for processing interrupts
+ * @ch: per channel data
+ * @pci_id: DMA device PCI ID
+ * @intr_mask: Interrupt mask to be used
+ * @mask_reg: MMIO register for periphral mask
+ * @chan_base: Base ch index (read from driver data)
+ * @max_chan: max number of chs supported (from drv_data)
+ * @block_size: Block size of DMA transfer supported (from drv_data)
+ * @pimr_mask: MMIO register addr for periphral interrupt (from drv_data)
+ */
+struct middma_device {
+ struct pci_dev *pdev;
+ void __iomem *dma_base;
+ struct pci_pool *dma_pool;
+ struct dma_device common;
+ struct tasklet_struct tasklet;
+ struct intel_mid_dma_chan ch[MAX_CHAN];
+ unsigned int pci_id;
+ unsigned int intr_mask;
+ void __iomem *mask_reg;
+ int chan_base;
+ int max_chan;
+ int block_size;
+ unsigned int pimr_mask;
+};
+
+static inline struct middma_device *to_middma_device(struct dma_device *common)
+{
+ return container_of(common, struct middma_device, common);
+}
+
+struct intel_mid_dma_desc {
+ void __iomem *block; /*ch ptr*/
+ struct list_head desc_node;
+ struct dma_async_tx_descriptor txd;
+ size_t len;
+ dma_addr_t sar;
+ dma_addr_t dar;
+ u32 cfg_hi;
+ u32 cfg_lo;
+ u32 ctl_lo;
+ u32 ctl_hi;
+ dma_addr_t next;
+ enum dma_data_direction dirn;
+ enum dma_status status;
+ enum intel_mid_dma_width width; /*width of DMA txn*/
+ enum intel_mid_dma_mode cfg_mode; /*mode configuration*/
+
+};
+
+static inline int test_ch_en(void __iomem *dma, u32 ch_no)
+{
+ u32 en_reg = ioread32(dma + DMA_CHAN_EN);
+ return (en_reg >> ch_no) & 0x1;
+}
+
+static inline struct intel_mid_dma_desc *to_intel_mid_dma_desc
+ (struct dma_async_tx_descriptor *txd)
+{
+ return container_of(txd, struct intel_mid_dma_desc, txd);
+}
+#endif /*__INTEL_MID_DMAC_REGS_H__*/
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index 6d3a73b57e5..5216c8a92a2 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -97,6 +97,7 @@ struct ioat_chan_common {
#define IOAT_RESET_PENDING 2
#define IOAT_KOBJ_INIT_FAIL 3
#define IOAT_RESHAPE_PENDING 4
+ #define IOAT_RUN 5
struct timer_list timer;
#define COMPLETION_TIMEOUT msecs_to_jiffies(100)
#define IDLE_TIMEOUT msecs_to_jiffies(2000)
diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 3c8b32a8379..216f9d383b5 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -287,7 +287,10 @@ void ioat2_timer_event(unsigned long data)
chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
dev_err(to_dev(chan), "%s: Channel halted (%x)\n",
__func__, chanerr);
- BUG_ON(is_ioat_bug(chanerr));
+ if (test_bit(IOAT_RUN, &chan->state))
+ BUG_ON(is_ioat_bug(chanerr));
+ else /* we never got off the ground */
+ return;
}
/* if we haven't made progress and we have already
@@ -492,6 +495,8 @@ static struct ioat_ring_ent **ioat2_alloc_ring(struct dma_chan *c, int order, gf
return ring;
}
+void ioat2_free_chan_resources(struct dma_chan *c);
+
/* ioat2_alloc_chan_resources - allocate/initialize ioat2 descriptor ring
* @chan: channel to be initialized
*/
@@ -500,6 +505,7 @@ int ioat2_alloc_chan_resources(struct dma_chan *c)
struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
struct ioat_chan_common *chan = &ioat->base;
struct ioat_ring_ent **ring;
+ u64 status;
int order;
/* have we already been set up? */
@@ -540,7 +546,20 @@ int ioat2_alloc_chan_resources(struct dma_chan *c)
tasklet_enable(&chan->cleanup_task);
ioat2_start_null_desc(ioat);
- return 1 << ioat->alloc_order;
+ /* check that we got off the ground */
+ udelay(5);
+ status = ioat_chansts(chan);
+ if (is_ioat_active(status) || is_ioat_idle(status)) {
+ set_bit(IOAT_RUN, &chan->state);
+ return 1 << ioat->alloc_order;
+ } else {
+ u32 chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
+
+ dev_WARN(to_dev(chan),
+ "failed to start channel chanerr: %#x\n", chanerr);
+ ioat2_free_chan_resources(c);
+ return -EFAULT;
+ }
}
bool reshape_ring(struct ioat2_dma_chan *ioat, int order)
@@ -778,6 +797,7 @@ void ioat2_free_chan_resources(struct dma_chan *c)
del_timer_sync(&chan->timer);
device->cleanup_fn((unsigned long) c);
device->reset_hw(chan);
+ clear_bit(IOAT_RUN, &chan->state);
spin_lock_bh(&chan->cleanup_lock);
spin_lock_bh(&ioat->prep_lock);
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index 1cdd22e1051..d0f49909847 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -361,7 +361,10 @@ static void ioat3_timer_event(unsigned long data)
chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
dev_err(to_dev(chan), "%s: Channel halted (%x)\n",
__func__, chanerr);
- BUG_ON(is_ioat_bug(chanerr));
+ if (test_bit(IOAT_RUN, &chan->state))
+ BUG_ON(is_ioat_bug(chanerr));
+ else /* we never got off the ground */
+ return;
}
/* if we haven't made progress and we have already
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
new file mode 100644
index 00000000000..3533948b88b
--- /dev/null
+++ b/drivers/dma/pch_dma.c
@@ -0,0 +1,957 @@
+/*
+ * Topcliff PCH DMA controller driver
+ * Copyright (c) 2010 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pch_dma.h>
+
+#define DRV_NAME "pch-dma"
+
+#define DMA_CTL0_DISABLE 0x0
+#define DMA_CTL0_SG 0x1
+#define DMA_CTL0_ONESHOT 0x2
+#define DMA_CTL0_MODE_MASK_BITS 0x3
+#define DMA_CTL0_DIR_SHIFT_BITS 2
+#define DMA_CTL0_BITS_PER_CH 4
+
+#define DMA_CTL2_START_SHIFT_BITS 8
+#define DMA_CTL2_IRQ_ENABLE_MASK ((1UL << DMA_CTL2_START_SHIFT_BITS) - 1)
+
+#define DMA_STATUS_IDLE 0x0
+#define DMA_STATUS_DESC_READ 0x1
+#define DMA_STATUS_WAIT 0x2
+#define DMA_STATUS_ACCESS 0x3
+#define DMA_STATUS_BITS_PER_CH 2
+#define DMA_STATUS_MASK_BITS 0x3
+#define DMA_STATUS_SHIFT_BITS 16
+#define DMA_STATUS_IRQ(x) (0x1 << (x))
+#define DMA_STATUS_ERR(x) (0x1 << ((x) + 8))
+
+#define DMA_DESC_WIDTH_SHIFT_BITS 12
+#define DMA_DESC_WIDTH_1_BYTE (0x3 << DMA_DESC_WIDTH_SHIFT_BITS)
+#define DMA_DESC_WIDTH_2_BYTES (0x2 << DMA_DESC_WIDTH_SHIFT_BITS)
+#define DMA_DESC_WIDTH_4_BYTES (0x0 << DMA_DESC_WIDTH_SHIFT_BITS)
+#define DMA_DESC_MAX_COUNT_1_BYTE 0x3FF
+#define DMA_DESC_MAX_COUNT_2_BYTES 0x3FF
+#define DMA_DESC_MAX_COUNT_4_BYTES 0x7FF
+#define DMA_DESC_END_WITHOUT_IRQ 0x0
+#define DMA_DESC_END_WITH_IRQ 0x1
+#define DMA_DESC_FOLLOW_WITHOUT_IRQ 0x2
+#define DMA_DESC_FOLLOW_WITH_IRQ 0x3
+
+#define MAX_CHAN_NR 8
+
+static unsigned int init_nr_desc_per_channel = 64;
+module_param(init_nr_desc_per_channel, uint, 0644);
+MODULE_PARM_DESC(init_nr_desc_per_channel,
+ "initial descriptors per channel (default: 64)");
+
+struct pch_dma_desc_regs {
+ u32 dev_addr;
+ u32 mem_addr;
+ u32 size;
+ u32 next;
+};
+
+struct pch_dma_regs {
+ u32 dma_ctl0;
+ u32 dma_ctl1;
+ u32 dma_ctl2;
+ u32 reserved1;
+ u32 dma_sts0;
+ u32 dma_sts1;
+ u32 reserved2;
+ u32 reserved3;
+ struct pch_dma_desc_regs desc[0];
+};
+
+struct pch_dma_desc {
+ struct pch_dma_desc_regs regs;
+ struct dma_async_tx_descriptor txd;
+ struct list_head desc_node;
+ struct list_head tx_list;
+};
+
+struct pch_dma_chan {
+ struct dma_chan chan;
+ void __iomem *membase;
+ enum dma_data_direction dir;
+ struct tasklet_struct tasklet;
+ unsigned long err_status;
+
+ spinlock_t lock;
+
+ dma_cookie_t completed_cookie;
+ struct list_head active_list;
+ struct list_head queue;
+ struct list_head free_list;
+ unsigned int descs_allocated;
+};
+
+#define PDC_DEV_ADDR 0x00
+#define PDC_MEM_ADDR 0x04
+#define PDC_SIZE 0x08
+#define PDC_NEXT 0x0C
+
+#define channel_readl(pdc, name) \
+ readl((pdc)->membase + PDC_##name)
+#define channel_writel(pdc, name, val) \
+ writel((val), (pdc)->membase + PDC_##name)
+
+struct pch_dma {
+ struct dma_device dma;
+ void __iomem *membase;
+ struct pci_pool *pool;
+ struct pch_dma_regs regs;
+ struct pch_dma_desc_regs ch_regs[MAX_CHAN_NR];
+ struct pch_dma_chan channels[0];
+};
+
+#define PCH_DMA_CTL0 0x00
+#define PCH_DMA_CTL1 0x04
+#define PCH_DMA_CTL2 0x08
+#define PCH_DMA_STS0 0x10
+#define PCH_DMA_STS1 0x14
+
+#define dma_readl(pd, name) \
+ readl((pd)->membase + PCH_DMA_##name)
+#define dma_writel(pd, name, val) \
+ writel((val), (pd)->membase + PCH_DMA_##name)
+
+static inline struct pch_dma_desc *to_pd_desc(struct dma_async_tx_descriptor *txd)
+{
+ return container_of(txd, struct pch_dma_desc, txd);
+}
+
+static inline struct pch_dma_chan *to_pd_chan(struct dma_chan *chan)
+{
+ return container_of(chan, struct pch_dma_chan, chan);
+}
+
+static inline struct pch_dma *to_pd(struct dma_device *ddev)
+{
+ return container_of(ddev, struct pch_dma, dma);
+}
+
+static inline struct device *chan2dev(struct dma_chan *chan)
+{
+ return &chan->dev->device;
+}
+
+static inline struct device *chan2parent(struct dma_chan *chan)
+{
+ return chan->dev->device.parent;
+}
+
+static inline struct pch_dma_desc *pdc_first_active(struct pch_dma_chan *pd_chan)
+{
+ return list_first_entry(&pd_chan->active_list,
+ struct pch_dma_desc, desc_node);
+}
+
+static inline struct pch_dma_desc *pdc_first_queued(struct pch_dma_chan *pd_chan)
+{
+ return list_first_entry(&pd_chan->queue,
+ struct pch_dma_desc, desc_node);
+}
+
+static void pdc_enable_irq(struct dma_chan *chan, int enable)
+{
+ struct pch_dma *pd = to_pd(chan->device);
+ u32 val;
+
+ val = dma_readl(pd, CTL2);
+
+ if (enable)
+ val |= 0x1 << chan->chan_id;
+ else
+ val &= ~(0x1 << chan->chan_id);
+
+ dma_writel(pd, CTL2, val);
+
+ dev_dbg(chan2dev(chan), "pdc_enable_irq: chan %d -> %x\n",
+ chan->chan_id, val);
+}
+
+static void pdc_set_dir(struct dma_chan *chan)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+ struct pch_dma *pd = to_pd(chan->device);
+ u32 val;
+
+ val = dma_readl(pd, CTL0);
+
+ if (pd_chan->dir == DMA_TO_DEVICE)
+ val |= 0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +
+ DMA_CTL0_DIR_SHIFT_BITS);
+ else
+ val &= ~(0x1 << (DMA_CTL0_BITS_PER_CH * chan->chan_id +
+ DMA_CTL0_DIR_SHIFT_BITS));
+
+ dma_writel(pd, CTL0, val);
+
+ dev_dbg(chan2dev(chan), "pdc_set_dir: chan %d -> %x\n",
+ chan->chan_id, val);
+}
+
+static void pdc_set_mode(struct dma_chan *chan, u32 mode)
+{
+ struct pch_dma *pd = to_pd(chan->device);
+ u32 val;
+
+ val = dma_readl(pd, CTL0);
+
+ val &= ~(DMA_CTL0_MODE_MASK_BITS <<
+ (DMA_CTL0_BITS_PER_CH * chan->chan_id));
+ val |= mode << (DMA_CTL0_BITS_PER_CH * chan->chan_id);
+
+ dma_writel(pd, CTL0, val);
+
+ dev_dbg(chan2dev(chan), "pdc_set_mode: chan %d -> %x\n",
+ chan->chan_id, val);
+}
+
+static u32 pdc_get_status(struct pch_dma_chan *pd_chan)
+{
+ struct pch_dma *pd = to_pd(pd_chan->chan.device);
+ u32 val;
+
+ val = dma_readl(pd, STS0);
+ return DMA_STATUS_MASK_BITS & (val >> (DMA_STATUS_SHIFT_BITS +
+ DMA_STATUS_BITS_PER_CH * pd_chan->chan.chan_id));
+}
+
+static bool pdc_is_idle(struct pch_dma_chan *pd_chan)
+{
+ if (pdc_get_status(pd_chan) == DMA_STATUS_IDLE)
+ return true;
+ else
+ return false;
+}
+
+static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc)
+{
+ struct pch_dma *pd = to_pd(pd_chan->chan.device);
+ u32 val;
+
+ if (!pdc_is_idle(pd_chan)) {
+ dev_err(chan2dev(&pd_chan->chan),
+ "BUG: Attempt to start non-idle channel\n");
+ return;
+ }
+
+ channel_writel(pd_chan, DEV_ADDR, desc->regs.dev_addr);
+ channel_writel(pd_chan, MEM_ADDR, desc->regs.mem_addr);
+ channel_writel(pd_chan, SIZE, desc->regs.size);
+ channel_writel(pd_chan, NEXT, desc->regs.next);
+
+ dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> dev_addr: %x\n",
+ pd_chan->chan.chan_id, desc->regs.dev_addr);
+ dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> mem_addr: %x\n",
+ pd_chan->chan.chan_id, desc->regs.mem_addr);
+ dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> size: %x\n",
+ pd_chan->chan.chan_id, desc->regs.size);
+ dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> next: %x\n",
+ pd_chan->chan.chan_id, desc->regs.next);
+
+ if (list_empty(&desc->tx_list))
+ pdc_set_mode(&pd_chan->chan, DMA_CTL0_ONESHOT);
+ else
+ pdc_set_mode(&pd_chan->chan, DMA_CTL0_SG);
+
+ val = dma_readl(pd, CTL2);
+ val |= 1 << (DMA_CTL2_START_SHIFT_BITS + pd_chan->chan.chan_id);
+ dma_writel(pd, CTL2, val);
+}
+
+static void pdc_chain_complete(struct pch_dma_chan *pd_chan,
+ struct pch_dma_desc *desc)
+{
+ struct dma_async_tx_descriptor *txd = &desc->txd;
+ dma_async_tx_callback callback = txd->callback;
+ void *param = txd->callback_param;
+
+ list_splice_init(&desc->tx_list, &pd_chan->free_list);
+ list_move(&desc->desc_node, &pd_chan->free_list);
+
+ if (callback)
+ callback(param);
+}
+
+static void pdc_complete_all(struct pch_dma_chan *pd_chan)
+{
+ struct pch_dma_desc *desc, *_d;
+ LIST_HEAD(list);
+
+ BUG_ON(!pdc_is_idle(pd_chan));
+
+ if (!list_empty(&pd_chan->queue))
+ pdc_dostart(pd_chan, pdc_first_queued(pd_chan));
+
+ list_splice_init(&pd_chan->active_list, &list);
+ list_splice_init(&pd_chan->queue, &pd_chan->active_list);
+
+ list_for_each_entry_safe(desc, _d, &list, desc_node)
+ pdc_chain_complete(pd_chan, desc);
+}
+
+static void pdc_handle_error(struct pch_dma_chan *pd_chan)
+{
+ struct pch_dma_desc *bad_desc;
+
+ bad_desc = pdc_first_active(pd_chan);
+ list_del(&bad_desc->desc_node);
+
+ list_splice_init(&pd_chan->queue, pd_chan->active_list.prev);
+
+ if (!list_empty(&pd_chan->active_list))
+ pdc_dostart(pd_chan, pdc_first_active(pd_chan));
+
+ dev_crit(chan2dev(&pd_chan->chan), "Bad descriptor submitted\n");
+ dev_crit(chan2dev(&pd_chan->chan), "descriptor cookie: %d\n",
+ bad_desc->txd.cookie);
+
+ pdc_chain_complete(pd_chan, bad_desc);
+}
+
+static void pdc_advance_work(struct pch_dma_chan *pd_chan)
+{
+ if (list_empty(&pd_chan->active_list) ||
+ list_is_singular(&pd_chan->active_list)) {
+ pdc_complete_all(pd_chan);
+ } else {
+ pdc_chain_complete(pd_chan, pdc_first_active(pd_chan));
+ pdc_dostart(pd_chan, pdc_first_active(pd_chan));
+ }
+}
+
+static dma_cookie_t pdc_assign_cookie(struct pch_dma_chan *pd_chan,
+ struct pch_dma_desc *desc)
+{
+ dma_cookie_t cookie = pd_chan->chan.cookie;
+
+ if (++cookie < 0)
+ cookie = 1;
+
+ pd_chan->chan.cookie = cookie;
+ desc->txd.cookie = cookie;
+
+ return cookie;
+}
+
+static dma_cookie_t pd_tx_submit(struct dma_async_tx_descriptor *txd)
+{
+ struct pch_dma_desc *desc = to_pd_desc(txd);
+ struct pch_dma_chan *pd_chan = to_pd_chan(txd->chan);
+ dma_cookie_t cookie;
+
+ spin_lock_bh(&pd_chan->lock);
+ cookie = pdc_assign_cookie(pd_chan, desc);
+
+ if (list_empty(&pd_chan->active_list)) {
+ list_add_tail(&desc->desc_node, &pd_chan->active_list);
+ pdc_dostart(pd_chan, desc);
+ } else {
+ list_add_tail(&desc->desc_node, &pd_chan->queue);
+ }
+
+ spin_unlock_bh(&pd_chan->lock);
+ return 0;
+}
+
+static struct pch_dma_desc *pdc_alloc_desc(struct dma_chan *chan, gfp_t flags)
+{
+ struct pch_dma_desc *desc = NULL;
+ struct pch_dma *pd = to_pd(chan->device);
+ dma_addr_t addr;
+
+ desc = pci_pool_alloc(pd->pool, GFP_KERNEL, &addr);
+ if (desc) {
+ memset(desc, 0, sizeof(struct pch_dma_desc));
+ INIT_LIST_HEAD(&desc->tx_list);
+ dma_async_tx_descriptor_init(&desc->txd, chan);
+ desc->txd.tx_submit = pd_tx_submit;
+ desc->txd.flags = DMA_CTRL_ACK;
+ desc->txd.phys = addr;
+ }
+
+ return desc;
+}
+
+static struct pch_dma_desc *pdc_desc_get(struct pch_dma_chan *pd_chan)
+{
+ struct pch_dma_desc *desc, *_d;
+ struct pch_dma_desc *ret = NULL;
+ int i;
+
+ spin_lock_bh(&pd_chan->lock);
+ list_for_each_entry_safe(desc, _d, &pd_chan->free_list, desc_node) {
+ i++;
+ if (async_tx_test_ack(&desc->txd)) {
+ list_del(&desc->desc_node);
+ ret = desc;
+ break;
+ }
+ dev_dbg(chan2dev(&pd_chan->chan), "desc %p not ACKed\n", desc);
+ }
+ spin_unlock_bh(&pd_chan->lock);
+ dev_dbg(chan2dev(&pd_chan->chan), "scanned %d descriptors\n", i);
+
+ if (!ret) {
+ ret = pdc_alloc_desc(&pd_chan->chan, GFP_NOIO);
+ if (ret) {
+ spin_lock_bh(&pd_chan->lock);
+ pd_chan->descs_allocated++;
+ spin_unlock_bh(&pd_chan->lock);
+ } else {
+ dev_err(chan2dev(&pd_chan->chan),
+ "failed to alloc desc\n");
+ }
+ }
+
+ return ret;
+}
+
+static void pdc_desc_put(struct pch_dma_chan *pd_chan,
+ struct pch_dma_desc *desc)
+{
+ if (desc) {
+ spin_lock_bh(&pd_chan->lock);
+ list_splice_init(&desc->tx_list, &pd_chan->free_list);
+ list_add(&desc->desc_node, &pd_chan->free_list);
+ spin_unlock_bh(&pd_chan->lock);
+ }
+}
+
+static int pd_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+ struct pch_dma_desc *desc;
+ LIST_HEAD(tmp_list);
+ int i;
+
+ if (!pdc_is_idle(pd_chan)) {
+ dev_dbg(chan2dev(chan), "DMA channel not idle ?\n");
+ return -EIO;
+ }
+
+ if (!list_empty(&pd_chan->free_list))
+ return pd_chan->descs_allocated;
+
+ for (i = 0; i < init_nr_desc_per_channel; i++) {
+ desc = pdc_alloc_desc(chan, GFP_KERNEL);
+
+ if (!desc) {
+ dev_warn(chan2dev(chan),
+ "Only allocated %d initial descriptors\n", i);
+ break;
+ }
+
+ list_add_tail(&desc->desc_node, &tmp_list);
+ }
+
+ spin_lock_bh(&pd_chan->lock);
+ list_splice(&tmp_list, &pd_chan->free_list);
+ pd_chan->descs_allocated = i;
+ pd_chan->completed_cookie = chan->cookie = 1;
+ spin_unlock_bh(&pd_chan->lock);
+
+ pdc_enable_irq(chan, 1);
+ pdc_set_dir(chan);
+
+ return pd_chan->descs_allocated;
+}
+
+static void pd_free_chan_resources(struct dma_chan *chan)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+ struct pch_dma *pd = to_pd(chan->device);
+ struct pch_dma_desc *desc, *_d;
+ LIST_HEAD(tmp_list);
+
+ BUG_ON(!pdc_is_idle(pd_chan));
+ BUG_ON(!list_empty(&pd_chan->active_list));
+ BUG_ON(!list_empty(&pd_chan->queue));
+
+ spin_lock_bh(&pd_chan->lock);
+ list_splice_init(&pd_chan->free_list, &tmp_list);
+ pd_chan->descs_allocated = 0;
+ spin_unlock_bh(&pd_chan->lock);
+
+ list_for_each_entry_safe(desc, _d, &tmp_list, desc_node)
+ pci_pool_free(pd->pool, desc, desc->txd.phys);
+
+ pdc_enable_irq(chan, 0);
+}
+
+static enum dma_status pd_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+ dma_cookie_t last_used;
+ dma_cookie_t last_completed;
+ int ret;
+
+ spin_lock_bh(&pd_chan->lock);
+ last_completed = pd_chan->completed_cookie;
+ last_used = chan->cookie;
+ spin_unlock_bh(&pd_chan->lock);
+
+ ret = dma_async_is_complete(cookie, last_completed, last_used);
+
+ dma_set_tx_state(txstate, last_completed, last_used, 0);
+
+ return ret;
+}
+
+static void pd_issue_pending(struct dma_chan *chan)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+
+ if (pdc_is_idle(pd_chan)) {
+ spin_lock_bh(&pd_chan->lock);
+ pdc_advance_work(pd_chan);
+ spin_unlock_bh(&pd_chan->lock);
+ }
+}
+
+static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
+ struct scatterlist *sgl, unsigned int sg_len,
+ enum dma_data_direction direction, unsigned long flags)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+ struct pch_dma_slave *pd_slave = chan->private;
+ struct pch_dma_desc *first = NULL;
+ struct pch_dma_desc *prev = NULL;
+ struct pch_dma_desc *desc = NULL;
+ struct scatterlist *sg;
+ dma_addr_t reg;
+ int i;
+
+ if (unlikely(!sg_len)) {
+ dev_info(chan2dev(chan), "prep_slave_sg: length is zero!\n");
+ return NULL;
+ }
+
+ if (direction == DMA_FROM_DEVICE)
+ reg = pd_slave->rx_reg;
+ else if (direction == DMA_TO_DEVICE)
+ reg = pd_slave->tx_reg;
+ else
+ return NULL;
+
+ for_each_sg(sgl, sg, sg_len, i) {
+ desc = pdc_desc_get(pd_chan);
+
+ if (!desc)
+ goto err_desc_get;
+
+ desc->regs.dev_addr = reg;
+ desc->regs.mem_addr = sg_phys(sg);
+ desc->regs.size = sg_dma_len(sg);
+ desc->regs.next = DMA_DESC_FOLLOW_WITHOUT_IRQ;
+
+ switch (pd_slave->width) {
+ case PCH_DMA_WIDTH_1_BYTE:
+ if (desc->regs.size > DMA_DESC_MAX_COUNT_1_BYTE)
+ goto err_desc_get;
+ desc->regs.size |= DMA_DESC_WIDTH_1_BYTE;
+ break;
+ case PCH_DMA_WIDTH_2_BYTES:
+ if (desc->regs.size > DMA_DESC_MAX_COUNT_2_BYTES)
+ goto err_desc_get;
+ desc->regs.size |= DMA_DESC_WIDTH_2_BYTES;
+ break;
+ case PCH_DMA_WIDTH_4_BYTES:
+ if (desc->regs.size > DMA_DESC_MAX_COUNT_4_BYTES)
+ goto err_desc_get;
+ desc->regs.size |= DMA_DESC_WIDTH_4_BYTES;
+ break;
+ default:
+ goto err_desc_get;
+ }
+
+
+ if (!first) {
+ first = desc;
+ } else {
+ prev->regs.next |= desc->txd.phys;
+ list_add_tail(&desc->desc_node, &first->tx_list);
+ }
+
+ prev = desc;
+ }
+
+ if (flags & DMA_PREP_INTERRUPT)
+ desc->regs.next = DMA_DESC_END_WITH_IRQ;
+ else
+ desc->regs.next = DMA_DESC_END_WITHOUT_IRQ;
+
+ first->txd.cookie = -EBUSY;
+ desc->txd.flags = flags;
+
+ return &first->txd;
+
+err_desc_get:
+ dev_err(chan2dev(chan), "failed to get desc or wrong parameters\n");
+ pdc_desc_put(pd_chan, first);
+ return NULL;
+}
+
+static int pd_device_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
+ unsigned long arg)
+{
+ struct pch_dma_chan *pd_chan = to_pd_chan(chan);
+ struct pch_dma_desc *desc, *_d;
+ LIST_HEAD(list);
+
+ if (cmd != DMA_TERMINATE_ALL)
+ return -ENXIO;
+
+ spin_lock_bh(&pd_chan->lock);
+
+ pdc_set_mode(&pd_chan->chan, DMA_CTL0_DISABLE);
+
+ list_splice_init(&pd_chan->active_list, &list);
+ list_splice_init(&pd_chan->queue, &list);
+
+ list_for_each_entry_safe(desc, _d, &list, desc_node)
+ pdc_chain_complete(pd_chan, desc);
+
+ spin_unlock_bh(&pd_chan->lock);
+
+
+ return 0;
+}
+
+static void pdc_tasklet(unsigned long data)
+{
+ struct pch_dma_chan *pd_chan = (struct pch_dma_chan *)data;
+
+ if (!pdc_is_idle(pd_chan)) {
+ dev_err(chan2dev(&pd_chan->chan),
+ "BUG: handle non-idle channel in tasklet\n");
+ return;
+ }
+
+ spin_lock_bh(&pd_chan->lock);
+ if (test_and_clear_bit(0, &pd_chan->err_status))
+ pdc_handle_error(pd_chan);
+ else
+ pdc_advance_work(pd_chan);
+ spin_unlock_bh(&pd_chan->lock);
+}
+
+static irqreturn_t pd_irq(int irq, void *devid)
+{
+ struct pch_dma *pd = (struct pch_dma *)devid;
+ struct pch_dma_chan *pd_chan;
+ u32 sts0;
+ int i;
+ int ret = IRQ_NONE;
+
+ sts0 = dma_readl(pd, STS0);
+
+ dev_dbg(pd->dma.dev, "pd_irq sts0: %x\n", sts0);
+
+ for (i = 0; i < pd->dma.chancnt; i++) {
+ pd_chan = &pd->channels[i];
+
+ if (sts0 & DMA_STATUS_IRQ(i)) {
+ if (sts0 & DMA_STATUS_ERR(i))
+ set_bit(0, &pd_chan->err_status);
+
+ tasklet_schedule(&pd_chan->tasklet);
+ ret = IRQ_HANDLED;
+ }
+
+ }
+
+ /* clear interrupt bits in status register */
+ dma_writel(pd, STS0, sts0);
+
+ return ret;
+}
+
+static void pch_dma_save_regs(struct pch_dma *pd)
+{
+ struct pch_dma_chan *pd_chan;
+ struct dma_chan *chan, *_c;
+ int i = 0;
+
+ pd->regs.dma_ctl0 = dma_readl(pd, CTL0);
+ pd->regs.dma_ctl1 = dma_readl(pd, CTL1);
+ pd->regs.dma_ctl2 = dma_readl(pd, CTL2);
+
+ list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) {
+ pd_chan = to_pd_chan(chan);
+
+ pd->ch_regs[i].dev_addr = channel_readl(pd_chan, DEV_ADDR);
+ pd->ch_regs[i].mem_addr = channel_readl(pd_chan, MEM_ADDR);
+ pd->ch_regs[i].size = channel_readl(pd_chan, SIZE);
+ pd->ch_regs[i].next = channel_readl(pd_chan, NEXT);
+
+ i++;
+ }
+}
+
+static void pch_dma_restore_regs(struct pch_dma *pd)
+{
+ struct pch_dma_chan *pd_chan;
+ struct dma_chan *chan, *_c;
+ int i = 0;
+
+ dma_writel(pd, CTL0, pd->regs.dma_ctl0);
+ dma_writel(pd, CTL1, pd->regs.dma_ctl1);
+ dma_writel(pd, CTL2, pd->regs.dma_ctl2);
+
+ list_for_each_entry_safe(chan, _c, &pd->dma.channels, device_node) {
+ pd_chan = to_pd_chan(chan);
+
+ channel_writel(pd_chan, DEV_ADDR, pd->ch_regs[i].dev_addr);
+ channel_writel(pd_chan, MEM_ADDR, pd->ch_regs[i].mem_addr);
+ channel_writel(pd_chan, SIZE, pd->ch_regs[i].size);
+ channel_writel(pd_chan, NEXT, pd->ch_regs[i].next);
+
+ i++;
+ }
+}
+
+static int pch_dma_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct pch_dma *pd = pci_get_drvdata(pdev);
+
+ if (pd)
+ pch_dma_save_regs(pd);
+
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+ return 0;
+}
+
+static int pch_dma_resume(struct pci_dev *pdev)
+{
+ struct pch_dma *pd = pci_get_drvdata(pdev);
+ int err;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_dbg(&pdev->dev, "failed to enable device\n");
+ return err;
+ }
+
+ if (pd)
+ pch_dma_restore_regs(pd);
+
+ return 0;
+}
+
+static int __devinit pch_dma_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct pch_dma *pd;
+ struct pch_dma_regs *regs;
+ unsigned int nr_channels;
+ int err;
+ int i;
+
+ nr_channels = id->driver_data;
+ pd = kzalloc(sizeof(struct pch_dma)+
+ sizeof(struct pch_dma_chan) * nr_channels, GFP_KERNEL);
+ if (!pd)
+ return -ENOMEM;
+
+ pci_set_drvdata(pdev, pd);
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot enable PCI device\n");
+ goto err_free_mem;
+ }
+
+ if (!(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
+ dev_err(&pdev->dev, "Cannot find proper base address\n");
+ goto err_disable_pdev;
+ }
+
+ err = pci_request_regions(pdev, DRV_NAME);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot obtain PCI resources\n");
+ goto err_disable_pdev;
+ }
+
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (err) {
+ dev_err(&pdev->dev, "Cannot set proper DMA config\n");
+ goto err_free_res;
+ }
+
+ regs = pd->membase = pci_iomap(pdev, 1, 0);
+ if (!pd->membase) {
+ dev_err(&pdev->dev, "Cannot map MMIO registers\n");
+ err = -ENOMEM;
+ goto err_free_res;
+ }
+
+ pci_set_master(pdev);
+
+ err = request_irq(pdev->irq, pd_irq, IRQF_SHARED, DRV_NAME, pd);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to request IRQ\n");
+ goto err_iounmap;
+ }
+
+ pd->pool = pci_pool_create("pch_dma_desc_pool", pdev,
+ sizeof(struct pch_dma_desc), 4, 0);
+ if (!pd->pool) {
+ dev_err(&pdev->dev, "Failed to alloc DMA descriptors\n");
+ err = -ENOMEM;
+ goto err_free_irq;
+ }
+
+ pd->dma.dev = &pdev->dev;
+ pd->dma.chancnt = nr_channels;
+
+ INIT_LIST_HEAD(&pd->dma.channels);
+
+ for (i = 0; i < nr_channels; i++) {
+ struct pch_dma_chan *pd_chan = &pd->channels[i];
+
+ pd_chan->chan.device = &pd->dma;
+ pd_chan->chan.cookie = 1;
+ pd_chan->chan.chan_id = i;
+
+ pd_chan->membase = &regs->desc[i];
+
+ pd_chan->dir = (i % 2) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+ spin_lock_init(&pd_chan->lock);
+
+ INIT_LIST_HEAD(&pd_chan->active_list);
+ INIT_LIST_HEAD(&pd_chan->queue);
+ INIT_LIST_HEAD(&pd_chan->free_list);
+
+ tasklet_init(&pd_chan->tasklet, pdc_tasklet,
+ (unsigned long)pd_chan);
+ list_add_tail(&pd_chan->chan.device_node, &pd->dma.channels);
+ }
+
+ dma_cap_zero(pd->dma.cap_mask);
+ dma_cap_set(DMA_PRIVATE, pd->dma.cap_mask);
+ dma_cap_set(DMA_SLAVE, pd->dma.cap_mask);
+
+ pd->dma.device_alloc_chan_resources = pd_alloc_chan_resources;
+ pd->dma.device_free_chan_resources = pd_free_chan_resources;
+ pd->dma.device_tx_status = pd_tx_status;
+ pd->dma.device_issue_pending = pd_issue_pending;
+ pd->dma.device_prep_slave_sg = pd_prep_slave_sg;
+ pd->dma.device_control = pd_device_control;
+
+ err = dma_async_device_register(&pd->dma);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to register DMA device\n");
+ goto err_free_pool;
+ }
+
+ return 0;
+
+err_free_pool:
+ pci_pool_destroy(pd->pool);
+err_free_irq:
+ free_irq(pdev->irq, pd);
+err_iounmap:
+ pci_iounmap(pdev, pd->membase);
+err_free_res:
+ pci_release_regions(pdev);
+err_disable_pdev:
+ pci_disable_device(pdev);
+err_free_mem:
+ return err;
+}
+
+static void __devexit pch_dma_remove(struct pci_dev *pdev)
+{
+ struct pch_dma *pd = pci_get_drvdata(pdev);
+ struct pch_dma_chan *pd_chan;
+ struct dma_chan *chan, *_c;
+
+ if (pd) {
+ dma_async_device_unregister(&pd->dma);
+
+ list_for_each_entry_safe(chan, _c, &pd->dma.channels,
+ device_node) {
+ pd_chan = to_pd_chan(chan);
+
+ tasklet_disable(&pd_chan->tasklet);
+ tasklet_kill(&pd_chan->tasklet);
+ }
+
+ pci_pool_destroy(pd->pool);
+ free_irq(pdev->irq, pd);
+ pci_iounmap(pdev, pd->membase);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ kfree(pd);
+ }
+}
+
+/* PCI Device ID of DMA device */
+#define PCI_DEVICE_ID_PCH_DMA_8CH 0x8810
+#define PCI_DEVICE_ID_PCH_DMA_4CH 0x8815
+
+static const struct pci_device_id pch_dma_id_table[] = {
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_DMA_8CH), 8 },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_DMA_4CH), 4 },
+};
+
+static struct pci_driver pch_dma_driver = {
+ .name = DRV_NAME,
+ .id_table = pch_dma_id_table,
+ .probe = pch_dma_probe,
+ .remove = __devexit_p(pch_dma_remove),
+#ifdef CONFIG_PM
+ .suspend = pch_dma_suspend,
+ .resume = pch_dma_resume,
+#endif
+};
+
+static int __init pch_dma_init(void)
+{
+ return pci_register_driver(&pch_dma_driver);
+}
+
+static void __exit pch_dma_exit(void)
+{
+ pci_unregister_driver(&pch_dma_driver);
+}
+
+module_init(pch_dma_init);
+module_exit(pch_dma_exit);
+
+MODULE_DESCRIPTION("Topcliff PCH DMA controller driver");
+MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index c426829f6ab..17e2600a00c 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -30,14 +30,16 @@
/* Maximum iterations taken before giving up suspending a channel */
#define D40_SUSPEND_MAX_IT 500
+/* Hardware requirement on LCLA alignment */
+#define LCLA_ALIGNMENT 0x40000
+/* Attempts before giving up to trying to get pages that are aligned */
+#define MAX_LCLA_ALLOC_ATTEMPTS 256
+
+/* Bit markings for allocation map */
#define D40_ALLOC_FREE (1 << 31)
#define D40_ALLOC_PHY (1 << 30)
#define D40_ALLOC_LOG_FREE 0
-/* The number of free d40_desc to keep in memory before starting
- * to kfree() them */
-#define D40_DESC_CACHE_SIZE 50
-
/* Hardware designer of the block */
#define D40_PERIPHID2_DESIGNER 0x8
@@ -68,9 +70,9 @@ enum d40_command {
*/
struct d40_lli_pool {
void *base;
- int size;
+ int size;
/* Space for dst and src, plus an extra for padding */
- u8 pre_alloc_lli[3 * sizeof(struct d40_phy_lli)];
+ u8 pre_alloc_lli[3 * sizeof(struct d40_phy_lli)];
};
/**
@@ -81,9 +83,10 @@ struct d40_lli_pool {
* lli_len equals one.
* @lli_log: Same as above but for logical channels.
* @lli_pool: The pool with two entries pre-allocated.
- * @lli_len: Number of LLI's in lli_pool
- * @lli_tcount: Number of LLIs processed in the transfer. When equals lli_len
- * then this transfer job is done.
+ * @lli_len: Number of llis of current descriptor.
+ * @lli_count: Number of transfered llis.
+ * @lli_tx_len: Max number of LLIs per transfer, there can be
+ * many transfer for one descriptor.
* @txd: DMA engine struct. Used for among other things for communication
* during a transfer.
* @node: List entry.
@@ -100,8 +103,9 @@ struct d40_desc {
struct d40_log_lli_bidir lli_log;
struct d40_lli_pool lli_pool;
- u32 lli_len;
- u32 lli_tcount;
+ int lli_len;
+ int lli_count;
+ u32 lli_tx_len;
struct dma_async_tx_descriptor txd;
struct list_head node;
@@ -113,18 +117,20 @@ struct d40_desc {
/**
* struct d40_lcla_pool - LCLA pool settings and data.
*
- * @base: The virtual address of LCLA.
- * @phy: Physical base address of LCLA.
- * @base_size: size of lcla.
+ * @base: The virtual address of LCLA. 18 bit aligned.
+ * @base_unaligned: The orignal kmalloc pointer, if kmalloc is used.
+ * This pointer is only there for clean-up on error.
+ * @pages: The number of pages needed for all physical channels.
+ * Only used later for clean-up on error
* @lock: Lock to protect the content in this struct.
- * @alloc_map: Mapping between physical channel and LCLA entries.
+ * @alloc_map: Bitmap mapping between physical channel and LCLA entries.
* @num_blocks: The number of entries of alloc_map. Equals to the
* number of physical channels.
*/
struct d40_lcla_pool {
void *base;
- dma_addr_t phy;
- resource_size_t base_size;
+ void *base_unaligned;
+ int pages;
spinlock_t lock;
u32 *alloc_map;
int num_blocks;
@@ -163,15 +169,14 @@ struct d40_base;
* @pending_tx: The number of pending transfers. Used between interrupt handler
* and tasklet.
* @busy: Set to true when transfer is ongoing on this channel.
- * @phy_chan: Pointer to physical channel which this instance runs on.
+ * @phy_chan: Pointer to physical channel which this instance runs on. If this
+ * point is NULL, then the channel is not allocated.
* @chan: DMA engine handle.
* @tasklet: Tasklet that gets scheduled from interrupt context to complete a
* transfer and call client callback.
* @client: Cliented owned descriptor list.
* @active: Active descriptor.
* @queue: Queued jobs.
- * @free: List of free descripts, ready to be reused.
- * @free_len: Number of descriptors in the free list.
* @dma_cfg: The client configuration of this dma channel.
* @base: Pointer to the device instance struct.
* @src_def_cfg: Default cfg register setting for src.
@@ -195,8 +200,6 @@ struct d40_chan {
struct list_head client;
struct list_head active;
struct list_head queue;
- struct list_head free;
- int free_len;
struct stedma40_chan_cfg dma_cfg;
struct d40_base *base;
/* Default register configurations */
@@ -205,6 +208,9 @@ struct d40_chan {
struct d40_def_lcsp log_def;
struct d40_lcla_elem lcla;
struct d40_log_lli_full *lcpa;
+ /* Runtime reconfiguration */
+ dma_addr_t runtime_addr;
+ enum dma_data_direction runtime_direction;
};
/**
@@ -215,6 +221,7 @@ struct d40_chan {
* the same physical register.
* @dev: The device structure.
* @virtbase: The virtual base address of the DMA's register.
+ * @rev: silicon revision detected.
* @clk: Pointer to the DMA clock structure.
* @phy_start: Physical memory start of the DMA registers.
* @phy_size: Size of the DMA register map.
@@ -240,12 +247,14 @@ struct d40_chan {
* @lcpa_base: The virtual mapped address of LCPA.
* @phy_lcpa: The physical address of the LCPA.
* @lcpa_size: The size of the LCPA area.
+ * @desc_slab: cache for descriptors.
*/
struct d40_base {
spinlock_t interrupt_lock;
spinlock_t execmd_lock;
struct device *dev;
void __iomem *virtbase;
+ u8 rev:4;
struct clk *clk;
phys_addr_t phy_start;
resource_size_t phy_size;
@@ -266,6 +275,7 @@ struct d40_base {
void *lcpa_base;
dma_addr_t phy_lcpa;
resource_size_t lcpa_size;
+ struct kmem_cache *desc_slab;
};
/**
@@ -365,11 +375,6 @@ static dma_cookie_t d40_assign_cookie(struct d40_chan *d40c,
return cookie;
}
-static void d40_desc_reset(struct d40_desc *d40d)
-{
- d40d->lli_tcount = 0;
-}
-
static void d40_desc_remove(struct d40_desc *d40d)
{
list_del(&d40d->node);
@@ -377,7 +382,6 @@ static void d40_desc_remove(struct d40_desc *d40d)
static struct d40_desc *d40_desc_get(struct d40_chan *d40c)
{
- struct d40_desc *desc;
struct d40_desc *d;
struct d40_desc *_d;
@@ -386,36 +390,21 @@ static struct d40_desc *d40_desc_get(struct d40_chan *d40c)
if (async_tx_test_ack(&d->txd)) {
d40_pool_lli_free(d);
d40_desc_remove(d);
- desc = d;
- goto out;
+ break;
}
- }
-
- if (list_empty(&d40c->free)) {
- /* Alloc new desc because we're out of used ones */
- desc = kzalloc(sizeof(struct d40_desc), GFP_NOWAIT);
- if (desc == NULL)
- goto out;
- INIT_LIST_HEAD(&desc->node);
} else {
- /* Reuse an old desc. */
- desc = list_first_entry(&d40c->free,
- struct d40_desc,
- node);
- list_del(&desc->node);
- d40c->free_len--;
+ d = kmem_cache_alloc(d40c->base->desc_slab, GFP_NOWAIT);
+ if (d != NULL) {
+ memset(d, 0, sizeof(struct d40_desc));
+ INIT_LIST_HEAD(&d->node);
+ }
}
-out:
- return desc;
+ return d;
}
static void d40_desc_free(struct d40_chan *d40c, struct d40_desc *d40d)
{
- if (d40c->free_len < D40_DESC_CACHE_SIZE) {
- list_add_tail(&d40d->node, &d40c->free);
- d40c->free_len++;
- } else
- kfree(d40d);
+ kmem_cache_free(d40c->base->desc_slab, d40d);
}
static void d40_desc_submit(struct d40_chan *d40c, struct d40_desc *desc)
@@ -456,37 +445,41 @@ static struct d40_desc *d40_first_queued(struct d40_chan *d40c)
/* Support functions for logical channels */
-static int d40_lcla_id_get(struct d40_chan *d40c,
- struct d40_lcla_pool *pool)
+static int d40_lcla_id_get(struct d40_chan *d40c)
{
int src_id = 0;
int dst_id = 0;
struct d40_log_lli *lcla_lidx_base =
- pool->base + d40c->phy_chan->num * 1024;
+ d40c->base->lcla_pool.base + d40c->phy_chan->num * 1024;
int i;
int lli_per_log = d40c->base->plat_data->llis_per_log;
+ unsigned long flags;
if (d40c->lcla.src_id >= 0 && d40c->lcla.dst_id >= 0)
return 0;
- if (pool->num_blocks > 32)
+ if (d40c->base->lcla_pool.num_blocks > 32)
return -EINVAL;
- spin_lock(&pool->lock);
+ spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
- for (i = 0; i < pool->num_blocks; i++) {
- if (!(pool->alloc_map[d40c->phy_chan->num] & (0x1 << i))) {
- pool->alloc_map[d40c->phy_chan->num] |= (0x1 << i);
+ for (i = 0; i < d40c->base->lcla_pool.num_blocks; i++) {
+ if (!(d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &
+ (0x1 << i))) {
+ d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] |=
+ (0x1 << i);
break;
}
}
src_id = i;
- if (src_id >= pool->num_blocks)
+ if (src_id >= d40c->base->lcla_pool.num_blocks)
goto err;
- for (; i < pool->num_blocks; i++) {
- if (!(pool->alloc_map[d40c->phy_chan->num] & (0x1 << i))) {
- pool->alloc_map[d40c->phy_chan->num] |= (0x1 << i);
+ for (; i < d40c->base->lcla_pool.num_blocks; i++) {
+ if (!(d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &
+ (0x1 << i))) {
+ d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] |=
+ (0x1 << i);
break;
}
}
@@ -500,28 +493,13 @@ static int d40_lcla_id_get(struct d40_chan *d40c,
d40c->lcla.dst = lcla_lidx_base + dst_id * lli_per_log + 1;
d40c->lcla.src = lcla_lidx_base + src_id * lli_per_log + 1;
-
- spin_unlock(&pool->lock);
+ spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
return 0;
err:
- spin_unlock(&pool->lock);
+ spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
return -EINVAL;
}
-static void d40_lcla_id_put(struct d40_chan *d40c,
- struct d40_lcla_pool *pool,
- int id)
-{
- if (id < 0)
- return;
-
- d40c->lcla.src_id = -1;
- d40c->lcla.dst_id = -1;
-
- spin_lock(&pool->lock);
- pool->alloc_map[d40c->phy_chan->num] &= (~(0x1 << id));
- spin_unlock(&pool->lock);
-}
static int d40_channel_execute_command(struct d40_chan *d40c,
enum d40_command command)
@@ -530,6 +508,7 @@ static int d40_channel_execute_command(struct d40_chan *d40c,
void __iomem *active_reg;
int ret = 0;
unsigned long flags;
+ u32 wmask;
spin_lock_irqsave(&d40c->base->execmd_lock, flags);
@@ -547,7 +526,9 @@ static int d40_channel_execute_command(struct d40_chan *d40c,
goto done;
}
- writel(command << D40_CHAN_POS(d40c->phy_chan->num), active_reg);
+ wmask = 0xffffffff & ~(D40_CHAN_POS_MASK(d40c->phy_chan->num));
+ writel(wmask | (command << D40_CHAN_POS(d40c->phy_chan->num)),
+ active_reg);
if (command == D40_DMA_SUSPEND_REQ) {
@@ -586,8 +567,7 @@ done:
static void d40_term_all(struct d40_chan *d40c)
{
struct d40_desc *d40d;
- struct d40_desc *d;
- struct d40_desc *_d;
+ unsigned long flags;
/* Release active descriptors */
while ((d40d = d40_first_active_get(d40c))) {
@@ -605,19 +585,17 @@ static void d40_term_all(struct d40_chan *d40c)
d40_desc_free(d40c, d40d);
}
- /* Release client owned descriptors */
- if (!list_empty(&d40c->client))
- list_for_each_entry_safe(d, _d, &d40c->client, node) {
- d40_pool_lli_free(d);
- d40_desc_remove(d);
- /* Return desc to free-list */
- d40_desc_free(d40c, d40d);
- }
+ spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
+
+ d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &=
+ (~(0x1 << d40c->lcla.dst_id));
+ d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &=
+ (~(0x1 << d40c->lcla.src_id));
+
+ d40c->lcla.src_id = -1;
+ d40c->lcla.dst_id = -1;
- d40_lcla_id_put(d40c, &d40c->base->lcla_pool,
- d40c->lcla.src_id);
- d40_lcla_id_put(d40c, &d40c->base->lcla_pool,
- d40c->lcla.dst_id);
+ spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
d40c->pending_tx = 0;
d40c->busy = false;
@@ -628,6 +606,7 @@ static void d40_config_set_event(struct d40_chan *d40c, bool do_enable)
u32 val;
unsigned long flags;
+ /* Notice, that disable requires the physical channel to be stopped */
if (do_enable)
val = D40_ACTIVATE_EVENTLINE;
else
@@ -732,31 +711,34 @@ static int d40_config_write(struct d40_chan *d40c)
static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d)
{
-
if (d40d->lli_phy.dst && d40d->lli_phy.src) {
d40_phy_lli_write(d40c->base->virtbase,
d40c->phy_chan->num,
d40d->lli_phy.dst,
d40d->lli_phy.src);
- d40d->lli_tcount = d40d->lli_len;
} else if (d40d->lli_log.dst && d40d->lli_log.src) {
- u32 lli_len;
struct d40_log_lli *src = d40d->lli_log.src;
struct d40_log_lli *dst = d40d->lli_log.dst;
-
- src += d40d->lli_tcount;
- dst += d40d->lli_tcount;
-
- if (d40d->lli_len <= d40c->base->plat_data->llis_per_log)
- lli_len = d40d->lli_len;
- else
- lli_len = d40c->base->plat_data->llis_per_log;
- d40d->lli_tcount += lli_len;
- d40_log_lli_write(d40c->lcpa, d40c->lcla.src,
- d40c->lcla.dst,
- dst, src,
- d40c->base->plat_data->llis_per_log);
+ int s;
+
+ src += d40d->lli_count;
+ dst += d40d->lli_count;
+ s = d40_log_lli_write(d40c->lcpa,
+ d40c->lcla.src, d40c->lcla.dst,
+ dst, src,
+ d40c->base->plat_data->llis_per_log);
+
+ /* If s equals to zero, the job is not linked */
+ if (s > 0) {
+ (void) dma_map_single(d40c->base->dev, d40c->lcla.src,
+ s * sizeof(struct d40_log_lli),
+ DMA_TO_DEVICE);
+ (void) dma_map_single(d40c->base->dev, d40c->lcla.dst,
+ s * sizeof(struct d40_log_lli),
+ DMA_TO_DEVICE);
+ }
}
+ d40d->lli_count += d40d->lli_tx_len;
}
static dma_cookie_t d40_tx_submit(struct dma_async_tx_descriptor *tx)
@@ -780,18 +762,21 @@ static dma_cookie_t d40_tx_submit(struct dma_async_tx_descriptor *tx)
static int d40_start(struct d40_chan *d40c)
{
- int err;
+ if (d40c->base->rev == 0) {
+ int err;
- if (d40c->log_num != D40_PHY_CHAN) {
- err = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
- if (err)
- return err;
- d40_config_set_event(d40c, true);
+ if (d40c->log_num != D40_PHY_CHAN) {
+ err = d40_channel_execute_command(d40c,
+ D40_DMA_SUSPEND_REQ);
+ if (err)
+ return err;
+ }
}
- err = d40_channel_execute_command(d40c, D40_DMA_RUN);
+ if (d40c->log_num != D40_PHY_CHAN)
+ d40_config_set_event(d40c, true);
- return err;
+ return d40_channel_execute_command(d40c, D40_DMA_RUN);
}
static struct d40_desc *d40_queue_start(struct d40_chan *d40c)
@@ -838,7 +823,7 @@ static void dma_tc_handle(struct d40_chan *d40c)
if (d40d == NULL)
return;
- if (d40d->lli_tcount < d40d->lli_len) {
+ if (d40d->lli_count < d40d->lli_len) {
d40_desc_load(d40c, d40d);
/* Start dma job */
@@ -891,7 +876,6 @@ static void dma_tasklet(unsigned long data)
/* Return desc to free-list */
d40_desc_free(d40c, d40d_fin);
} else {
- d40_desc_reset(d40d_fin);
if (!d40d_fin->is_in_client_list) {
d40_desc_remove(d40d_fin);
list_add_tail(&d40d_fin->node, &d40c->client);
@@ -975,7 +959,8 @@ static irqreturn_t d40_handle_interrupt(int irq, void *data)
if (!il[row].is_error)
dma_tc_handle(d40c);
else
- dev_err(base->dev, "[%s] IRQ chan: %ld offset %d idx %d\n",
+ dev_err(base->dev,
+ "[%s] IRQ chan: %ld offset %d idx %d\n",
__func__, chan, il[row].offset, idx);
spin_unlock(&d40c->lock);
@@ -1134,7 +1119,8 @@ static int d40_allocate_channel(struct d40_chan *d40c)
int j;
int log_num;
bool is_src;
- bool is_log = (d40c->dma_cfg.channel_type & STEDMA40_CHANNEL_IN_OPER_MODE)
+ bool is_log = (d40c->dma_cfg.channel_type &
+ STEDMA40_CHANNEL_IN_OPER_MODE)
== STEDMA40_CHANNEL_IN_LOG_MODE;
@@ -1169,8 +1155,10 @@ static int d40_allocate_channel(struct d40_chan *d40c)
for (j = 0; j < d40c->base->num_phy_chans; j += 8) {
int phy_num = j + event_group * 2;
for (i = phy_num; i < phy_num + 2; i++) {
- if (d40_alloc_mask_set(&phys[i], is_src,
- 0, is_log))
+ if (d40_alloc_mask_set(&phys[i],
+ is_src,
+ 0,
+ is_log))
goto found_phy;
}
}
@@ -1221,30 +1209,6 @@ out:
}
-static int d40_config_chan(struct d40_chan *d40c,
- struct stedma40_chan_cfg *info)
-{
-
- /* Fill in basic CFG register values */
- d40_phy_cfg(&d40c->dma_cfg, &d40c->src_def_cfg,
- &d40c->dst_def_cfg, d40c->log_num != D40_PHY_CHAN);
-
- if (d40c->log_num != D40_PHY_CHAN) {
- d40_log_cfg(&d40c->dma_cfg,
- &d40c->log_def.lcsp1, &d40c->log_def.lcsp3);
-
- if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM)
- d40c->lcpa = d40c->base->lcpa_base +
- d40c->dma_cfg.src_dev_type * 32;
- else
- d40c->lcpa = d40c->base->lcpa_base +
- d40c->dma_cfg.dst_dev_type * 32 + 16;
- }
-
- /* Write channel configuration to the DMA */
- return d40_config_write(d40c);
-}
-
static int d40_config_memcpy(struct d40_chan *d40c)
{
dma_cap_mask_t cap = d40c->chan.device->cap_mask;
@@ -1272,13 +1236,25 @@ static int d40_free_dma(struct d40_chan *d40c)
{
int res = 0;
- u32 event, dir;
+ u32 event;
struct d40_phy_res *phy = d40c->phy_chan;
bool is_src;
+ struct d40_desc *d;
+ struct d40_desc *_d;
+
/* Terminate all queued and active transfers */
d40_term_all(d40c);
+ /* Release client owned descriptors */
+ if (!list_empty(&d40c->client))
+ list_for_each_entry_safe(d, _d, &d40c->client, node) {
+ d40_pool_lli_free(d);
+ d40_desc_remove(d);
+ /* Return desc to free-list */
+ d40_desc_free(d40c, d);
+ }
+
if (phy == NULL) {
dev_err(&d40c->chan.dev->device, "[%s] phy == null\n",
__func__);
@@ -1292,22 +1268,12 @@ static int d40_free_dma(struct d40_chan *d40c)
return -EINVAL;
}
-
- res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
- if (res) {
- dev_err(&d40c->chan.dev->device, "[%s] suspend\n",
- __func__);
- return res;
- }
-
if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH ||
d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM) {
event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dst_dev_type);
- dir = D40_CHAN_REG_SDLNK;
is_src = false;
} else if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) {
event = D40_TYPE_TO_EVENT(d40c->dma_cfg.src_dev_type);
- dir = D40_CHAN_REG_SSLNK;
is_src = true;
} else {
dev_err(&d40c->chan.dev->device,
@@ -1315,16 +1281,17 @@ static int d40_free_dma(struct d40_chan *d40c)
return -EINVAL;
}
+ res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
+ if (res) {
+ dev_err(&d40c->chan.dev->device, "[%s] suspend failed\n",
+ __func__);
+ return res;
+ }
+
if (d40c->log_num != D40_PHY_CHAN) {
- /*
- * Release logical channel, deactivate the event line during
- * the time physical res is suspended.
- */
- writel((D40_DEACTIVATE_EVENTLINE << D40_EVENTLINE_POS(event)) &
- D40_EVENTLINE_MASK(event),
- d40c->base->virtbase + D40_DREG_PCBASE +
- phy->num * D40_DREG_PCDELTA + dir);
+ /* Release logical channel, deactivate the event line */
+ d40_config_set_event(d40c, false);
d40c->base->lookup_log_chans[d40c->log_num] = NULL;
/*
@@ -1345,8 +1312,9 @@ static int d40_free_dma(struct d40_chan *d40c)
}
return 0;
}
- } else
- d40_alloc_mask_free(phy, is_src, 0);
+ } else {
+ (void) d40_alloc_mask_free(phy, is_src, 0);
+ }
/* Release physical channel */
res = d40_channel_execute_command(d40c, D40_DMA_STOP);
@@ -1361,8 +1329,6 @@ static int d40_free_dma(struct d40_chan *d40c)
d40c->base->lookup_phy_chans[phy->num] = NULL;
return 0;
-
-
}
static int d40_pause(struct dma_chan *chan)
@@ -1370,7 +1336,6 @@ static int d40_pause(struct dma_chan *chan)
struct d40_chan *d40c =
container_of(chan, struct d40_chan, chan);
int res;
-
unsigned long flags;
spin_lock_irqsave(&d40c->lock, flags);
@@ -1397,7 +1362,6 @@ static bool d40_is_paused(struct d40_chan *d40c)
void __iomem *active_reg;
u32 status;
u32 event;
- int res;
spin_lock_irqsave(&d40c->lock, flags);
@@ -1416,10 +1380,6 @@ static bool d40_is_paused(struct d40_chan *d40c)
goto _exit;
}
- res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
- if (res != 0)
- goto _exit;
-
if (d40c->dma_cfg.dir == STEDMA40_MEM_TO_PERIPH ||
d40c->dma_cfg.dir == STEDMA40_MEM_TO_MEM)
event = D40_TYPE_TO_EVENT(d40c->dma_cfg.dst_dev_type);
@@ -1436,12 +1396,6 @@ static bool d40_is_paused(struct d40_chan *d40c)
if (status != D40_DMA_RUN)
is_paused = true;
-
- /* Resume the other logical channels if any */
- if (d40_chan_has_events(d40c))
- res = d40_channel_execute_command(d40c,
- D40_DMA_RUN);
-
_exit:
spin_unlock_irqrestore(&d40c->lock, flags);
return is_paused;
@@ -1468,13 +1422,14 @@ static u32 d40_residue(struct d40_chan *d40c)
u32 num_elt;
if (d40c->log_num != D40_PHY_CHAN)
- num_elt = (readl(&d40c->lcpa->lcsp2) & D40_MEM_LCSP2_ECNT_MASK)
+ num_elt = (readl(&d40c->lcpa->lcsp2) & D40_MEM_LCSP2_ECNT_MASK)
>> D40_MEM_LCSP2_ECNT_POS;
else
num_elt = (readl(d40c->base->virtbase + D40_DREG_PCBASE +
d40c->phy_chan->num * D40_DREG_PCDELTA +
D40_CHAN_REG_SDELT) &
- D40_SREG_ELEM_PHY_ECNT_MASK) >> D40_SREG_ELEM_PHY_ECNT_POS;
+ D40_SREG_ELEM_PHY_ECNT_MASK) >>
+ D40_SREG_ELEM_PHY_ECNT_POS;
return num_elt * (1 << d40c->dma_cfg.dst_info.data_width);
}
@@ -1487,20 +1442,21 @@ static int d40_resume(struct dma_chan *chan)
spin_lock_irqsave(&d40c->lock, flags);
- if (d40c->log_num != D40_PHY_CHAN) {
- res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
- if (res)
- goto out;
+ if (d40c->base->rev == 0)
+ if (d40c->log_num != D40_PHY_CHAN) {
+ res = d40_channel_execute_command(d40c,
+ D40_DMA_SUSPEND_REQ);
+ goto no_suspend;
+ }
- /* If bytes left to transfer or linked tx resume job */
- if (d40_residue(d40c) || d40_tx_is_linked(d40c)) {
+ /* If bytes left to transfer or linked tx resume job */
+ if (d40_residue(d40c) || d40_tx_is_linked(d40c)) {
+ if (d40c->log_num != D40_PHY_CHAN)
d40_config_set_event(d40c, true);
- res = d40_channel_execute_command(d40c, D40_DMA_RUN);
- }
- } else if (d40_residue(d40c) || d40_tx_is_linked(d40c))
res = d40_channel_execute_command(d40c, D40_DMA_RUN);
+ }
-out:
+no_suspend:
spin_unlock_irqrestore(&d40c->lock, flags);
return res;
}
@@ -1534,8 +1490,10 @@ int stedma40_set_psize(struct dma_chan *chan,
if (d40c->log_num != D40_PHY_CHAN) {
d40c->log_def.lcsp1 &= ~D40_MEM_LCSP1_SCFG_PSIZE_MASK;
d40c->log_def.lcsp3 &= ~D40_MEM_LCSP1_SCFG_PSIZE_MASK;
- d40c->log_def.lcsp1 |= src_psize << D40_MEM_LCSP1_SCFG_PSIZE_POS;
- d40c->log_def.lcsp3 |= dst_psize << D40_MEM_LCSP1_SCFG_PSIZE_POS;
+ d40c->log_def.lcsp1 |= src_psize <<
+ D40_MEM_LCSP1_SCFG_PSIZE_POS;
+ d40c->log_def.lcsp3 |= dst_psize <<
+ D40_MEM_LCSP1_SCFG_PSIZE_POS;
goto out;
}
@@ -1566,37 +1524,42 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
struct scatterlist *sgl_dst,
struct scatterlist *sgl_src,
unsigned int sgl_len,
- unsigned long flags)
+ unsigned long dma_flags)
{
int res;
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
- unsigned long flg;
- int lli_max = d40c->base->plat_data->llis_per_log;
+ unsigned long flags;
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Unallocated channel.\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
- spin_lock_irqsave(&d40c->lock, flg);
+ spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_desc_get(d40c);
if (d40d == NULL)
goto err;
- memset(d40d, 0, sizeof(struct d40_desc));
d40d->lli_len = sgl_len;
-
- d40d->txd.flags = flags;
+ d40d->lli_tx_len = d40d->lli_len;
+ d40d->txd.flags = dma_flags;
if (d40c->log_num != D40_PHY_CHAN) {
+ if (d40d->lli_len > d40c->base->plat_data->llis_per_log)
+ d40d->lli_tx_len = d40c->base->plat_data->llis_per_log;
+
if (sgl_len > 1)
/*
* Check if there is space available in lcla. If not,
* split list into 1-length and run only in lcpa
* space.
*/
- if (d40_lcla_id_get(d40c,
- &d40c->base->lcla_pool) != 0)
- lli_max = 1;
+ if (d40_lcla_id_get(d40c) != 0)
+ d40d->lli_tx_len = 1;
if (d40_pool_lli_alloc(d40d, sgl_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
@@ -1610,7 +1573,8 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->lli_log.src,
d40c->log_def.lcsp1,
d40c->dma_cfg.src_info.data_width,
- flags & DMA_PREP_INTERRUPT, lli_max,
+ dma_flags & DMA_PREP_INTERRUPT,
+ d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
(void) d40_log_sg_to_lli(d40c->lcla.dst_id,
@@ -1619,7 +1583,8 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->lli_log.dst,
d40c->log_def.lcsp3,
d40c->dma_cfg.dst_info.data_width,
- flags & DMA_PREP_INTERRUPT, lli_max,
+ dma_flags & DMA_PREP_INTERRUPT,
+ d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
@@ -1664,11 +1629,11 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->txd.tx_submit = d40_tx_submit;
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return &d40d->txd;
err:
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return NULL;
}
EXPORT_SYMBOL(stedma40_memcpy_sg);
@@ -1698,46 +1663,66 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
unsigned long flags;
struct d40_chan *d40c =
container_of(chan, struct d40_chan, chan);
-
+ bool is_free_phy;
spin_lock_irqsave(&d40c->lock, flags);
d40c->completed = chan->cookie = 1;
/*
* If no dma configuration is set (channel_type == 0)
- * use default configuration
+ * use default configuration (memcpy)
*/
if (d40c->dma_cfg.channel_type == 0) {
err = d40_config_memcpy(d40c);
- if (err)
- goto err_alloc;
+ if (err) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Failed to configure memcpy channel\n",
+ __func__);
+ goto fail;
+ }
}
+ is_free_phy = (d40c->phy_chan == NULL);
err = d40_allocate_channel(d40c);
if (err) {
dev_err(&d40c->chan.dev->device,
"[%s] Failed to allocate channel\n", __func__);
- goto err_alloc;
+ goto fail;
}
- err = d40_config_chan(d40c, &d40c->dma_cfg);
- if (err) {
- dev_err(&d40c->chan.dev->device,
- "[%s] Failed to configure channel\n",
- __func__);
- goto err_config;
- }
+ /* Fill in basic CFG register values */
+ d40_phy_cfg(&d40c->dma_cfg, &d40c->src_def_cfg,
+ &d40c->dst_def_cfg, d40c->log_num != D40_PHY_CHAN);
- spin_unlock_irqrestore(&d40c->lock, flags);
- return 0;
+ if (d40c->log_num != D40_PHY_CHAN) {
+ d40_log_cfg(&d40c->dma_cfg,
+ &d40c->log_def.lcsp1, &d40c->log_def.lcsp3);
- err_config:
- (void) d40_free_dma(d40c);
- err_alloc:
+ if (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM)
+ d40c->lcpa = d40c->base->lcpa_base +
+ d40c->dma_cfg.src_dev_type * D40_LCPA_CHAN_SIZE;
+ else
+ d40c->lcpa = d40c->base->lcpa_base +
+ d40c->dma_cfg.dst_dev_type *
+ D40_LCPA_CHAN_SIZE + D40_LCPA_CHAN_DST_DELTA;
+ }
+
+ /*
+ * Only write channel configuration to the DMA if the physical
+ * resource is free. In case of multiple logical channels
+ * on the same physical resource, only the first write is necessary.
+ */
+ if (is_free_phy) {
+ err = d40_config_write(d40c);
+ if (err) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Failed to configure channel\n",
+ __func__);
+ }
+ }
+fail:
spin_unlock_irqrestore(&d40c->lock, flags);
- dev_err(&d40c->chan.dev->device,
- "[%s] Channel allocation failed\n", __func__);
- return -EINVAL;
+ return err;
}
static void d40_free_chan_resources(struct dma_chan *chan)
@@ -1747,6 +1732,13 @@ static void d40_free_chan_resources(struct dma_chan *chan)
int err;
unsigned long flags;
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Cannot free unallocated channel\n", __func__);
+ return;
+ }
+
+
spin_lock_irqsave(&d40c->lock, flags);
err = d40_free_dma(d40c);
@@ -1761,15 +1753,21 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
dma_addr_t dst,
dma_addr_t src,
size_t size,
- unsigned long flags)
+ unsigned long dma_flags)
{
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
- unsigned long flg;
+ unsigned long flags;
int err = 0;
- spin_lock_irqsave(&d40c->lock, flg);
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Channel is not allocated.\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_desc_get(d40c);
if (d40d == NULL) {
@@ -1778,9 +1776,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
goto err;
}
- memset(d40d, 0, sizeof(struct d40_desc));
-
- d40d->txd.flags = flags;
+ d40d->txd.flags = dma_flags;
dma_async_tx_descriptor_init(&d40d->txd, chan);
@@ -1794,6 +1790,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
goto err;
}
d40d->lli_len = 1;
+ d40d->lli_tx_len = 1;
d40_log_fill_lli(d40d->lli_log.src,
src,
@@ -1801,7 +1798,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
0,
d40c->log_def.lcsp1,
d40c->dma_cfg.src_info.data_width,
- true, true);
+ false, true);
d40_log_fill_lli(d40d->lli_log.dst,
dst,
@@ -1848,7 +1845,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
d40d->lli_pool.size, DMA_TO_DEVICE);
}
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return &d40d->txd;
err_fill_lli:
@@ -1856,7 +1853,7 @@ err_fill_lli:
"[%s] Failed filling in PHY LLI\n", __func__);
d40_pool_lli_free(d40d);
err:
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
return NULL;
}
@@ -1865,11 +1862,10 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
struct scatterlist *sgl,
unsigned int sg_len,
enum dma_data_direction direction,
- unsigned long flags)
+ unsigned long dma_flags)
{
dma_addr_t dev_addr = 0;
int total_size;
- int lli_max = d40c->base->plat_data->llis_per_log;
if (d40_pool_lli_alloc(d40d, sg_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
@@ -1878,7 +1874,10 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
}
d40d->lli_len = sg_len;
- d40d->lli_tcount = 0;
+ if (d40d->lli_len <= d40c->base->plat_data->llis_per_log)
+ d40d->lli_tx_len = d40d->lli_len;
+ else
+ d40d->lli_tx_len = d40c->base->plat_data->llis_per_log;
if (sg_len > 1)
/*
@@ -1886,35 +1885,34 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
* If not, split list into 1-length and run only
* in lcpa space.
*/
- if (d40_lcla_id_get(d40c, &d40c->base->lcla_pool) != 0)
- lli_max = 1;
+ if (d40_lcla_id_get(d40c) != 0)
+ d40d->lli_tx_len = 1;
- if (direction == DMA_FROM_DEVICE) {
- dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
- total_size = d40_log_sg_to_dev(&d40c->lcla,
- sgl, sg_len,
- &d40d->lli_log,
- &d40c->log_def,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width,
- direction,
- flags & DMA_PREP_INTERRUPT,
- dev_addr, lli_max,
- d40c->base->plat_data->llis_per_log);
- } else if (direction == DMA_TO_DEVICE) {
- dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
- total_size = d40_log_sg_to_dev(&d40c->lcla,
- sgl, sg_len,
- &d40d->lli_log,
- &d40c->log_def,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width,
- direction,
- flags & DMA_PREP_INTERRUPT,
- dev_addr, lli_max,
- d40c->base->plat_data->llis_per_log);
- } else
+ if (direction == DMA_FROM_DEVICE)
+ if (d40c->runtime_addr)
+ dev_addr = d40c->runtime_addr;
+ else
+ dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
+ else if (direction == DMA_TO_DEVICE)
+ if (d40c->runtime_addr)
+ dev_addr = d40c->runtime_addr;
+ else
+ dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
+
+ else
return -EINVAL;
+
+ total_size = d40_log_sg_to_dev(&d40c->lcla,
+ sgl, sg_len,
+ &d40d->lli_log,
+ &d40c->log_def,
+ d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width,
+ direction,
+ dma_flags & DMA_PREP_INTERRUPT,
+ dev_addr, d40d->lli_tx_len,
+ d40c->base->plat_data->llis_per_log);
+
if (total_size < 0)
return -EINVAL;
@@ -1926,7 +1924,7 @@ static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
struct scatterlist *sgl,
unsigned int sgl_len,
enum dma_data_direction direction,
- unsigned long flags)
+ unsigned long dma_flags)
{
dma_addr_t src_dev_addr;
dma_addr_t dst_dev_addr;
@@ -1939,13 +1937,19 @@ static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
}
d40d->lli_len = sgl_len;
- d40d->lli_tcount = 0;
+ d40d->lli_tx_len = sgl_len;
if (direction == DMA_FROM_DEVICE) {
dst_dev_addr = 0;
- src_dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
+ if (d40c->runtime_addr)
+ src_dev_addr = d40c->runtime_addr;
+ else
+ src_dev_addr = d40c->base->plat_data->dev_rx[d40c->dma_cfg.src_dev_type];
} else if (direction == DMA_TO_DEVICE) {
- dst_dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
+ if (d40c->runtime_addr)
+ dst_dev_addr = d40c->runtime_addr;
+ else
+ dst_dev_addr = d40c->base->plat_data->dev_tx[d40c->dma_cfg.dst_dev_type];
src_dev_addr = 0;
} else
return -EINVAL;
@@ -1983,34 +1987,38 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl,
unsigned int sg_len,
enum dma_data_direction direction,
- unsigned long flags)
+ unsigned long dma_flags)
{
struct d40_desc *d40d;
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
- unsigned long flg;
+ unsigned long flags;
int err;
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Cannot prepare unallocated channel\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
if (d40c->dma_cfg.pre_transfer)
d40c->dma_cfg.pre_transfer(chan,
d40c->dma_cfg.pre_transfer_data,
sg_dma_len(sgl));
- spin_lock_irqsave(&d40c->lock, flg);
+ spin_lock_irqsave(&d40c->lock, flags);
d40d = d40_desc_get(d40c);
- spin_unlock_irqrestore(&d40c->lock, flg);
+ spin_unlock_irqrestore(&d40c->lock, flags);
if (d40d == NULL)
return NULL;
- memset(d40d, 0, sizeof(struct d40_desc));
-
if (d40c->log_num != D40_PHY_CHAN)
err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
- direction, flags);
+ direction, dma_flags);
else
err = d40_prep_slave_sg_phy(d40d, d40c, sgl, sg_len,
- direction, flags);
+ direction, dma_flags);
if (err) {
dev_err(&d40c->chan.dev->device,
"[%s] Failed to prepare %s slave sg job: %d\n",
@@ -2019,7 +2027,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
return NULL;
}
- d40d->txd.flags = flags;
+ d40d->txd.flags = dma_flags;
dma_async_tx_descriptor_init(&d40d->txd, chan);
@@ -2037,6 +2045,13 @@ static enum dma_status d40_tx_status(struct dma_chan *chan,
dma_cookie_t last_complete;
int ret;
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Cannot read status of unallocated channel\n",
+ __func__);
+ return -EINVAL;
+ }
+
last_complete = d40c->completed;
last_used = chan->cookie;
@@ -2056,6 +2071,12 @@ static void d40_issue_pending(struct dma_chan *chan)
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
unsigned long flags;
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Channel is not allocated!\n", __func__);
+ return;
+ }
+
spin_lock_irqsave(&d40c->lock, flags);
/* Busy means that pending jobs are already being processed */
@@ -2065,12 +2086,129 @@ static void d40_issue_pending(struct dma_chan *chan)
spin_unlock_irqrestore(&d40c->lock, flags);
}
+/* Runtime reconfiguration extension */
+static void d40_set_runtime_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
+ struct stedma40_chan_cfg *cfg = &d40c->dma_cfg;
+ enum dma_slave_buswidth config_addr_width;
+ dma_addr_t config_addr;
+ u32 config_maxburst;
+ enum stedma40_periph_data_width addr_width;
+ int psize;
+
+ if (config->direction == DMA_FROM_DEVICE) {
+ dma_addr_t dev_addr_rx =
+ d40c->base->plat_data->dev_rx[cfg->src_dev_type];
+
+ config_addr = config->src_addr;
+ if (dev_addr_rx)
+ dev_dbg(d40c->base->dev,
+ "channel has a pre-wired RX address %08x "
+ "overriding with %08x\n",
+ dev_addr_rx, config_addr);
+ if (cfg->dir != STEDMA40_PERIPH_TO_MEM)
+ dev_dbg(d40c->base->dev,
+ "channel was not configured for peripheral "
+ "to memory transfer (%d) overriding\n",
+ cfg->dir);
+ cfg->dir = STEDMA40_PERIPH_TO_MEM;
+
+ config_addr_width = config->src_addr_width;
+ config_maxburst = config->src_maxburst;
+
+ } else if (config->direction == DMA_TO_DEVICE) {
+ dma_addr_t dev_addr_tx =
+ d40c->base->plat_data->dev_tx[cfg->dst_dev_type];
+
+ config_addr = config->dst_addr;
+ if (dev_addr_tx)
+ dev_dbg(d40c->base->dev,
+ "channel has a pre-wired TX address %08x "
+ "overriding with %08x\n",
+ dev_addr_tx, config_addr);
+ if (cfg->dir != STEDMA40_MEM_TO_PERIPH)
+ dev_dbg(d40c->base->dev,
+ "channel was not configured for memory "
+ "to peripheral transfer (%d) overriding\n",
+ cfg->dir);
+ cfg->dir = STEDMA40_MEM_TO_PERIPH;
+
+ config_addr_width = config->dst_addr_width;
+ config_maxburst = config->dst_maxburst;
+
+ } else {
+ dev_err(d40c->base->dev,
+ "unrecognized channel direction %d\n",
+ config->direction);
+ return;
+ }
+
+ switch (config_addr_width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ addr_width = STEDMA40_BYTE_WIDTH;
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ addr_width = STEDMA40_HALFWORD_WIDTH;
+ break;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ addr_width = STEDMA40_WORD_WIDTH;
+ break;
+ case DMA_SLAVE_BUSWIDTH_8_BYTES:
+ addr_width = STEDMA40_DOUBLEWORD_WIDTH;
+ break;
+ default:
+ dev_err(d40c->base->dev,
+ "illegal peripheral address width "
+ "requested (%d)\n",
+ config->src_addr_width);
+ return;
+ }
+
+ if (config_maxburst >= 16)
+ psize = STEDMA40_PSIZE_LOG_16;
+ else if (config_maxburst >= 8)
+ psize = STEDMA40_PSIZE_LOG_8;
+ else if (config_maxburst >= 4)
+ psize = STEDMA40_PSIZE_LOG_4;
+ else
+ psize = STEDMA40_PSIZE_LOG_1;
+
+ /* Set up all the endpoint configs */
+ cfg->src_info.data_width = addr_width;
+ cfg->src_info.psize = psize;
+ cfg->src_info.endianess = STEDMA40_LITTLE_ENDIAN;
+ cfg->src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL;
+ cfg->dst_info.data_width = addr_width;
+ cfg->dst_info.psize = psize;
+ cfg->dst_info.endianess = STEDMA40_LITTLE_ENDIAN;
+ cfg->dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL;
+
+ /* These settings will take precedence later */
+ d40c->runtime_addr = config_addr;
+ d40c->runtime_direction = config->direction;
+ dev_dbg(d40c->base->dev,
+ "configured channel %s for %s, data width %d, "
+ "maxburst %d bytes, LE, no flow control\n",
+ dma_chan_name(chan),
+ (config->direction == DMA_FROM_DEVICE) ? "RX" : "TX",
+ config_addr_width,
+ config_maxburst);
+}
+
static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg)
{
unsigned long flags;
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
+ if (d40c->phy_chan == NULL) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Channel is not allocated!\n", __func__);
+ return -EINVAL;
+ }
+
switch (cmd) {
case DMA_TERMINATE_ALL:
spin_lock_irqsave(&d40c->lock, flags);
@@ -2081,6 +2219,12 @@ static int d40_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
return d40_pause(chan);
case DMA_RESUME:
return d40_resume(chan);
+ case DMA_SLAVE_CONFIG:
+ d40_set_runtime_config(chan,
+ (struct dma_slave_config *) arg);
+ return 0;
+ default:
+ break;
}
/* Other commands are unimplemented */
@@ -2111,13 +2255,10 @@ static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma,
d40c->log_num = D40_PHY_CHAN;
- INIT_LIST_HEAD(&d40c->free);
INIT_LIST_HEAD(&d40c->active);
INIT_LIST_HEAD(&d40c->queue);
INIT_LIST_HEAD(&d40c->client);
- d40c->free_len = 0;
-
tasklet_init(&d40c->tasklet, dma_tasklet,
(unsigned long) d40c);
@@ -2243,6 +2384,14 @@ static int __init d40_phy_res_init(struct d40_base *base)
}
spin_lock_init(&base->phy_res[i].lock);
}
+
+ /* Mark disabled channels as occupied */
+ for (i = 0; base->plat_data->disabled_channels[i] != -1; i++) {
+ base->phy_res[i].allocated_src = D40_ALLOC_PHY;
+ base->phy_res[i].allocated_dst = D40_ALLOC_PHY;
+ num_phy_chans_avail--;
+ }
+
dev_info(base->dev, "%d of %d physical DMA channels available\n",
num_phy_chans_avail, base->num_phy_chans);
@@ -2291,6 +2440,7 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
int num_log_chans = 0;
int num_phy_chans;
int i;
+ u32 val;
clk = clk_get(&pdev->dev, NULL);
@@ -2329,12 +2479,13 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
}
}
- i = readl(virtbase + D40_DREG_PERIPHID2);
+ /* Get silicon revision */
+ val = readl(virtbase + D40_DREG_PERIPHID2);
- if ((i & 0xf) != D40_PERIPHID2_DESIGNER) {
+ if ((val & 0xf) != D40_PERIPHID2_DESIGNER) {
dev_err(&pdev->dev,
"[%s] Unknown designer! Got %x wanted %x\n",
- __func__, i & 0xf, D40_PERIPHID2_DESIGNER);
+ __func__, val & 0xf, D40_PERIPHID2_DESIGNER);
goto failure;
}
@@ -2342,7 +2493,7 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
num_phy_chans = 4 * (readl(virtbase + D40_DREG_ICFG) & 0x7) + 4;
dev_info(&pdev->dev, "hardware revision: %d @ 0x%x\n",
- (i >> 4) & 0xf, res->start);
+ (val >> 4) & 0xf, res->start);
plat_data = pdev->dev.platform_data;
@@ -2364,6 +2515,7 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
goto failure;
}
+ base->rev = (val >> 4) & 0xf;
base->clk = clk;
base->num_phy_chans = num_phy_chans;
base->num_log_chans = num_log_chans;
@@ -2402,6 +2554,12 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
if (!base->lcla_pool.alloc_map)
goto failure;
+ base->desc_slab = kmem_cache_create(D40_NAME, sizeof(struct d40_desc),
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL);
+ if (base->desc_slab == NULL)
+ goto failure;
+
return base;
failure:
@@ -2495,6 +2653,78 @@ static void __init d40_hw_init(struct d40_base *base)
}
+static int __init d40_lcla_allocate(struct d40_base *base)
+{
+ unsigned long *page_list;
+ int i, j;
+ int ret = 0;
+
+ /*
+ * This is somewhat ugly. We need 8192 bytes that are 18 bit aligned,
+ * To full fill this hardware requirement without wasting 256 kb
+ * we allocate pages until we get an aligned one.
+ */
+ page_list = kmalloc(sizeof(unsigned long) * MAX_LCLA_ALLOC_ATTEMPTS,
+ GFP_KERNEL);
+
+ if (!page_list) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+
+ /* Calculating how many pages that are required */
+ base->lcla_pool.pages = SZ_1K * base->num_phy_chans / PAGE_SIZE;
+
+ for (i = 0; i < MAX_LCLA_ALLOC_ATTEMPTS; i++) {
+ page_list[i] = __get_free_pages(GFP_KERNEL,
+ base->lcla_pool.pages);
+ if (!page_list[i]) {
+
+ dev_err(base->dev,
+ "[%s] Failed to allocate %d pages.\n",
+ __func__, base->lcla_pool.pages);
+
+ for (j = 0; j < i; j++)
+ free_pages(page_list[j], base->lcla_pool.pages);
+ goto failure;
+ }
+
+ if ((virt_to_phys((void *)page_list[i]) &
+ (LCLA_ALIGNMENT - 1)) == 0)
+ break;
+ }
+
+ for (j = 0; j < i; j++)
+ free_pages(page_list[j], base->lcla_pool.pages);
+
+ if (i < MAX_LCLA_ALLOC_ATTEMPTS) {
+ base->lcla_pool.base = (void *)page_list[i];
+ } else {
+ /* After many attempts, no succees with finding the correct
+ * alignment try with allocating a big buffer */
+ dev_warn(base->dev,
+ "[%s] Failed to get %d pages @ 18 bit align.\n",
+ __func__, base->lcla_pool.pages);
+ base->lcla_pool.base_unaligned = kmalloc(SZ_1K *
+ base->num_phy_chans +
+ LCLA_ALIGNMENT,
+ GFP_KERNEL);
+ if (!base->lcla_pool.base_unaligned) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+
+ base->lcla_pool.base = PTR_ALIGN(base->lcla_pool.base_unaligned,
+ LCLA_ALIGNMENT);
+ }
+
+ writel(virt_to_phys(base->lcla_pool.base),
+ base->virtbase + D40_DREG_LCLA);
+failure:
+ kfree(page_list);
+ return ret;
+}
+
static int __init d40_probe(struct platform_device *pdev)
{
int err;
@@ -2554,41 +2784,11 @@ static int __init d40_probe(struct platform_device *pdev)
__func__);
goto failure;
}
- /* Get IO for logical channel link address */
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lcla");
- if (!res) {
- ret = -ENOENT;
- dev_err(&pdev->dev,
- "[%s] No \"lcla\" resource defined\n",
- __func__);
- goto failure;
- }
- base->lcla_pool.base_size = resource_size(res);
- base->lcla_pool.phy = res->start;
-
- if (request_mem_region(res->start, resource_size(res),
- D40_NAME " I/O lcla") == NULL) {
- ret = -EBUSY;
- dev_err(&pdev->dev,
- "[%s] Failed to request LCLA region 0x%x-0x%x\n",
- __func__, res->start, res->end);
- goto failure;
- }
- val = readl(base->virtbase + D40_DREG_LCLA);
- if (res->start != val && val != 0) {
- dev_warn(&pdev->dev,
- "[%s] Mismatch LCLA dma 0x%x, def 0x%x\n",
- __func__, val, res->start);
- } else
- writel(res->start, base->virtbase + D40_DREG_LCLA);
-
- base->lcla_pool.base = ioremap(res->start, resource_size(res));
- if (!base->lcla_pool.base) {
- ret = -ENOMEM;
- dev_err(&pdev->dev,
- "[%s] Failed to ioremap LCLA 0x%x-0x%x\n",
- __func__, res->start, res->end);
+ ret = d40_lcla_allocate(base);
+ if (ret) {
+ dev_err(&pdev->dev, "[%s] Failed to allocate LCLA area\n",
+ __func__);
goto failure;
}
@@ -2616,11 +2816,15 @@ static int __init d40_probe(struct platform_device *pdev)
failure:
if (base) {
+ if (base->desc_slab)
+ kmem_cache_destroy(base->desc_slab);
if (base->virtbase)
iounmap(base->virtbase);
- if (base->lcla_pool.phy)
- release_mem_region(base->lcla_pool.phy,
- base->lcla_pool.base_size);
+ if (!base->lcla_pool.base_unaligned && base->lcla_pool.base)
+ free_pages((unsigned long)base->lcla_pool.base,
+ base->lcla_pool.pages);
+ if (base->lcla_pool.base_unaligned)
+ kfree(base->lcla_pool.base_unaligned);
if (base->phy_lcpa)
release_mem_region(base->phy_lcpa,
base->lcpa_size);
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index 561fdd8a80c..d937f76d6e2 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -315,11 +315,8 @@ int d40_log_sg_to_dev(struct d40_lcla_elem *lcla,
int total_size = 0;
struct scatterlist *current_sg = sg;
int i;
- u32 next_lli_off_dst;
- u32 next_lli_off_src;
-
- next_lli_off_src = 0;
- next_lli_off_dst = 0;
+ u32 next_lli_off_dst = 0;
+ u32 next_lli_off_src = 0;
for_each_sg(sg, current_sg, sg_len, i) {
total_size += sg_dma_len(current_sg);
@@ -351,7 +348,7 @@ int d40_log_sg_to_dev(struct d40_lcla_elem *lcla,
sg_dma_len(current_sg),
next_lli_off_src,
lcsp->lcsp1, src_data_width,
- term_int && !next_lli_off_src,
+ false,
true);
d40_log_fill_lli(&lli->dst[i],
dev_addr,
@@ -375,7 +372,7 @@ int d40_log_sg_to_dev(struct d40_lcla_elem *lcla,
sg_dma_len(current_sg),
next_lli_off_src,
lcsp->lcsp1, src_data_width,
- term_int && !next_lli_off_src,
+ false,
false);
}
}
@@ -423,32 +420,35 @@ int d40_log_sg_to_lli(int lcla_id,
return total_size;
}
-void d40_log_lli_write(struct d40_log_lli_full *lcpa,
+int d40_log_lli_write(struct d40_log_lli_full *lcpa,
struct d40_log_lli *lcla_src,
struct d40_log_lli *lcla_dst,
struct d40_log_lli *lli_dst,
struct d40_log_lli *lli_src,
int llis_per_log)
{
- u32 slos = 0;
- u32 dlos = 0;
+ u32 slos;
+ u32 dlos;
int i;
- lcpa->lcsp0 = lli_src->lcsp02;
- lcpa->lcsp1 = lli_src->lcsp13;
- lcpa->lcsp2 = lli_dst->lcsp02;
- lcpa->lcsp3 = lli_dst->lcsp13;
+ writel(lli_src->lcsp02, &lcpa->lcsp0);
+ writel(lli_src->lcsp13, &lcpa->lcsp1);
+ writel(lli_dst->lcsp02, &lcpa->lcsp2);
+ writel(lli_dst->lcsp13, &lcpa->lcsp3);
slos = lli_src->lcsp13 & D40_MEM_LCSP1_SLOS_MASK;
dlos = lli_dst->lcsp13 & D40_MEM_LCSP3_DLOS_MASK;
for (i = 0; (i < llis_per_log) && slos && dlos; i++) {
- writel(lli_src[i+1].lcsp02, &lcla_src[i].lcsp02);
- writel(lli_src[i+1].lcsp13, &lcla_src[i].lcsp13);
- writel(lli_dst[i+1].lcsp02, &lcla_dst[i].lcsp02);
- writel(lli_dst[i+1].lcsp13, &lcla_dst[i].lcsp13);
+ writel(lli_src[i + 1].lcsp02, &lcla_src[i].lcsp02);
+ writel(lli_src[i + 1].lcsp13, &lcla_src[i].lcsp13);
+ writel(lli_dst[i + 1].lcsp02, &lcla_dst[i].lcsp02);
+ writel(lli_dst[i + 1].lcsp13, &lcla_dst[i].lcsp13);
- slos = lli_src[i+1].lcsp13 & D40_MEM_LCSP1_SLOS_MASK;
- dlos = lli_dst[i+1].lcsp13 & D40_MEM_LCSP3_DLOS_MASK;
+ slos = lli_src[i + 1].lcsp13 & D40_MEM_LCSP1_SLOS_MASK;
+ dlos = lli_dst[i + 1].lcsp13 & D40_MEM_LCSP3_DLOS_MASK;
}
+
+ return i;
+
}
diff --git a/drivers/dma/ste_dma40_ll.h b/drivers/dma/ste_dma40_ll.h
index 2029280cb33..9c0fa2f5fe5 100644
--- a/drivers/dma/ste_dma40_ll.h
+++ b/drivers/dma/ste_dma40_ll.h
@@ -13,6 +13,9 @@
#define D40_DREG_PCDELTA (8 * 4)
#define D40_LLI_ALIGN 16 /* LLI alignment must be 16 bytes. */
+#define D40_LCPA_CHAN_SIZE 32
+#define D40_LCPA_CHAN_DST_DELTA 16
+
#define D40_TYPE_TO_GROUP(type) (type / 16)
#define D40_TYPE_TO_EVENT(type) (type % 16)
@@ -336,12 +339,12 @@ int d40_log_sg_to_dev(struct d40_lcla_elem *lcla,
bool term_int, dma_addr_t dev_addr, int max_len,
int llis_per_log);
-void d40_log_lli_write(struct d40_log_lli_full *lcpa,
- struct d40_log_lli *lcla_src,
- struct d40_log_lli *lcla_dst,
- struct d40_log_lli *lli_dst,
- struct d40_log_lli *lli_src,
- int llis_per_log);
+int d40_log_lli_write(struct d40_log_lli_full *lcpa,
+ struct d40_log_lli *lcla_src,
+ struct d40_log_lli *lcla_dst,
+ struct d40_log_lli *lli_dst,
+ struct d40_log_lli *lli_src,
+ int llis_per_log);
int d40_log_sg_to_lli(int lcla_id,
struct scatterlist *sg,
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index a1bf77c1993..2ec1ed56f20 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -200,8 +200,8 @@ static int td_fill_desc(struct timb_dma_chan *td_chan, u8 *dma_desc,
return -EINVAL;
}
- dev_dbg(chan2dev(&td_chan->chan), "desc: %p, addr: %p\n",
- dma_desc, (void *)sg_dma_address(sg));
+ dev_dbg(chan2dev(&td_chan->chan), "desc: %p, addr: 0x%llx\n",
+ dma_desc, (unsigned long long)sg_dma_address(sg));
dma_desc[7] = (sg_dma_address(sg) >> 24) & 0xff;
dma_desc[6] = (sg_dma_address(sg) >> 16) & 0xff;
@@ -382,7 +382,7 @@ static struct timb_dma_desc *td_alloc_init_desc(struct timb_dma_chan *td_chan)
td_desc = kzalloc(sizeof(struct timb_dma_desc), GFP_KERNEL);
if (!td_desc) {
dev_err(chan2dev(chan), "Failed to alloc descriptor\n");
- goto err;
+ goto out;
}
td_desc->desc_list_len = td_chan->desc_elems * TIMB_DMA_DESC_SIZE;
@@ -410,7 +410,7 @@ static struct timb_dma_desc *td_alloc_init_desc(struct timb_dma_chan *td_chan)
err:
kfree(td_desc->desc_list);
kfree(td_desc);
-
+out:
return NULL;
}
diff --git a/drivers/firmware/edd.c b/drivers/firmware/edd.c
index 110e24e5088..f287fe79edc 100644
--- a/drivers/firmware/edd.c
+++ b/drivers/firmware/edd.c
@@ -744,7 +744,7 @@ static inline int edd_num_devices(void)
static int __init
edd_init(void)
{
- unsigned int i;
+ int i;
int rc=0;
struct edd_device *edev;
@@ -760,21 +760,27 @@ edd_init(void)
if (!edd_kset)
return -ENOMEM;
- for (i = 0; i < edd_num_devices() && !rc; i++) {
+ for (i = 0; i < edd_num_devices(); i++) {
edev = kzalloc(sizeof (*edev), GFP_KERNEL);
- if (!edev)
- return -ENOMEM;
+ if (!edev) {
+ rc = -ENOMEM;
+ goto out;
+ }
rc = edd_device_register(edev, i);
if (rc) {
kfree(edev);
- break;
+ goto out;
}
edd_devices[i] = edev;
}
- if (rc)
- kset_unregister(edd_kset);
+ return 0;
+
+out:
+ while (--i >= 0)
+ edd_device_unregister(edd_devices[i]);
+ kset_unregister(edd_kset);
return rc;
}
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 45981304feb..b9e4dbfa053 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -839,7 +839,6 @@ static void output_poll_execute(struct work_struct *work)
struct drm_connector *connector;
enum drm_connector_status old_status, status;
bool repoll = false, changed = false;
- int ret;
mutex_lock(&dev->mode_config.mutex);
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
@@ -874,11 +873,8 @@ static void output_poll_execute(struct work_struct *work)
dev->mode_config.funcs->output_poll_changed(dev);
}
- if (repoll) {
- ret = queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
- if (ret)
- DRM_ERROR("delayed enqueue failed %d\n", ret);
- }
+ if (repoll)
+ queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
}
void drm_kms_helper_poll_disable(struct drm_device *dev)
@@ -893,18 +889,14 @@ void drm_kms_helper_poll_enable(struct drm_device *dev)
{
bool poll = false;
struct drm_connector *connector;
- int ret;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->polled)
poll = true;
}
- if (poll) {
- ret = queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
- if (ret)
- DRM_ERROR("delayed enqueue failed %d\n", ret);
- }
+ if (poll)
+ queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
}
EXPORT_SYMBOL(drm_kms_helper_poll_enable);
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 4d382ae5309..f3adf18bfa0 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -332,11 +332,11 @@ config SENSORS_F71805F
will be called f71805f.
config SENSORS_F71882FG
- tristate "Fintek F71858FG, F71862FG, F71882FG, F71889FG and F8000"
+ tristate "Fintek F71808E, F71858FG, F71862FG, F71882FG, F71889FG and F8000"
depends on EXPERIMENTAL
help
- If you say yes here you get support for hardware monitoring
- features of the Fintek F71858FG, F71862FG/71863FG, F71882FG/F71883FG,
+ If you say yes here you get support for hardware monitoring features
+ of the Fintek F71808E, F71858FG, F71862FG/71863FG, F71882FG/F71883FG,
F71889FG and F8000 Super-I/O chips.
This driver can also be built as a module. If so, the module
@@ -405,7 +405,7 @@ config SENSORS_CORETEMP
help
If you say yes here you get support for the temperature
sensor inside your CPU. Most of the family 6 CPUs
- are supported. Check documentation/driver for details.
+ are supported. Check Documentation/hwmon/coretemp for details.
config SENSORS_PKGTEMP
tristate "Intel processor package temperature sensor"
@@ -463,6 +463,17 @@ config SENSORS_JZ4740
This driver can also be build as a module. If so, the module will be
called jz4740-hwmon.
+config SENSORS_JC42
+ tristate "JEDEC JC42.4 compliant temperature sensors"
+ help
+ If you say yes here you get support for Jedec JC42.4 compliant
+ temperature sensors. Support will include, but not be limited to,
+ ADT7408, CAT34TS02,, CAT6095, MAX6604, MCP9805, MCP98242, MCP98243,
+ MCP9843, SE97, SE98, STTS424, TSE2002B3, and TS3000B3.
+
+ This driver can also be built as a module. If so, the module
+ will be called jc42.
+
config SENSORS_LM63
tristate "National Semiconductor LM63 and LM64"
depends on I2C
@@ -756,6 +767,21 @@ config SENSORS_SIS5595
This driver can also be built as a module. If so, the module
will be called sis5595.
+config SENSORS_SMM665
+ tristate "Summit Microelectronics SMM665"
+ depends on I2C && EXPERIMENTAL
+ default n
+ help
+ If you say yes here you get support for the hardware monitoring
+ features of the Summit Microelectronics SMM665/SMM665B Six-Channel
+ Active DC Output Controller / Monitor.
+
+ Other supported chips are SMM465, SMM665C, SMM764, and SMM766.
+ Support for those chips is untested.
+
+ This driver can also be built as a module. If so, the module will
+ be called smm665.
+
config SENSORS_DME1737
tristate "SMSC DME1737, SCH311x and compatibles"
depends on I2C && EXPERIMENTAL
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 9103bd6ea73..13d913e34db 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
obj-$(CONFIG_SENSORS_IT87) += it87.o
+obj-$(CONFIG_SENSORS_JC42) += jc42.o
obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o
obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o
@@ -88,6 +89,7 @@ obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o
obj-$(CONFIG_SENSORS_SHT15) += sht15.o
obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
+obj-$(CONFIG_SENSORS_SMM665) += smm665.o
obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 05344af5073..a92e28a3576 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -480,7 +480,6 @@ exit:
return err;
}
-#ifdef CONFIG_HOTPLUG_CPU
static void coretemp_device_remove(unsigned int cpu)
{
struct pdev_entry *p, *n;
@@ -502,10 +501,13 @@ static int __cpuinit coretemp_cpu_callback(struct notifier_block *nfb,
switch (action) {
case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
case CPU_DOWN_FAILED:
+ case CPU_DOWN_FAILED_FROZEN:
coretemp_device_add(cpu);
break;
case CPU_DOWN_PREPARE:
+ case CPU_DOWN_PREPARE_FROZEN:
coretemp_device_remove(cpu);
break;
}
@@ -515,7 +517,6 @@ static int __cpuinit coretemp_cpu_callback(struct notifier_block *nfb,
static struct notifier_block coretemp_cpu_notifier __refdata = {
.notifier_call = coretemp_cpu_callback,
};
-#endif /* !CONFIG_HOTPLUG_CPU */
static int __init coretemp_init(void)
{
@@ -537,12 +538,9 @@ static int __init coretemp_init(void)
* sensors. We check this bit only, all the early CPUs
* without thermal sensors will be filtered out.
*/
- if (c->cpuid_level >= 6 && (cpuid_eax(0x06) & 0x01)) {
- err = coretemp_device_add(i);
- if (err)
- goto exit_devices_unreg;
-
- } else {
+ if (c->cpuid_level >= 6 && (cpuid_eax(0x06) & 0x01))
+ coretemp_device_add(i);
+ else {
printk(KERN_INFO DRVNAME ": CPU (model=0x%x)"
" has no thermal sensor.\n", c->x86_model);
}
@@ -552,21 +550,13 @@ static int __init coretemp_init(void)
goto exit_driver_unreg;
}
-#ifdef CONFIG_HOTPLUG_CPU
register_hotcpu_notifier(&coretemp_cpu_notifier);
-#endif
return 0;
-exit_devices_unreg:
- mutex_lock(&pdev_list_mutex);
- list_for_each_entry_safe(p, n, &pdev_list, list) {
- platform_device_unregister(p->pdev);
- list_del(&p->list);
- kfree(p);
- }
- mutex_unlock(&pdev_list_mutex);
exit_driver_unreg:
+#ifndef CONFIG_HOTPLUG_CPU
platform_driver_unregister(&coretemp_driver);
+#endif
exit:
return err;
}
diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
index 537841ef44b..6207120dcd4 100644
--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -45,6 +45,7 @@
#define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */
#define SIO_FINTEK_ID 0x1934 /* Manufacturers ID */
+#define SIO_F71808_ID 0x0901 /* Chipset ID */
#define SIO_F71858_ID 0x0507 /* Chipset ID */
#define SIO_F71862_ID 0x0601 /* Chipset ID */
#define SIO_F71882_ID 0x0541 /* Chipset ID */
@@ -96,9 +97,10 @@ static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
-enum chips { f71858fg, f71862fg, f71882fg, f71889fg, f8000 };
+enum chips { f71808fg, f71858fg, f71862fg, f71882fg, f71889fg, f8000 };
static const char *f71882fg_names[] = {
+ "f71808fg",
"f71858fg",
"f71862fg",
"f71882fg",
@@ -306,8 +308,8 @@ static struct sensor_device_attribute_2 f71858fg_in_temp_attr[] = {
SENSOR_ATTR_2(temp3_fault, S_IRUGO, show_temp_fault, NULL, 0, 2),
};
-/* Temp and in attr common to the f71862fg, f71882fg and f71889fg */
-static struct sensor_device_attribute_2 fxxxx_in_temp_attr[] = {
+/* In attr common to the f71862fg, f71882fg and f71889fg */
+static struct sensor_device_attribute_2 fxxxx_in_attr[] = {
SENSOR_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0),
SENSOR_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 0, 1),
SENSOR_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 0, 2),
@@ -317,6 +319,22 @@ static struct sensor_device_attribute_2 fxxxx_in_temp_attr[] = {
SENSOR_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 0, 6),
SENSOR_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 0, 7),
SENSOR_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 0, 8),
+};
+
+/* In attr for the f71808fg */
+static struct sensor_device_attribute_2 f71808_in_attr[] = {
+ SENSOR_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0),
+ SENSOR_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 0, 1),
+ SENSOR_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 0, 2),
+ SENSOR_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 0, 3),
+ SENSOR_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 0, 4),
+ SENSOR_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 0, 5),
+ SENSOR_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 0, 7),
+ SENSOR_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 0, 8),
+};
+
+/* Temp attr common to the f71808fg, f71862fg, f71882fg and f71889fg */
+static struct sensor_device_attribute_2 fxxxx_temp_attr[] = {
SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 1),
SENSOR_ATTR_2(temp1_max, S_IRUGO|S_IWUSR, show_temp_max,
store_temp_max, 0, 1),
@@ -355,6 +373,10 @@ static struct sensor_device_attribute_2 fxxxx_in_temp_attr[] = {
store_temp_beep, 0, 6),
SENSOR_ATTR_2(temp2_type, S_IRUGO, show_temp_type, NULL, 0, 2),
SENSOR_ATTR_2(temp2_fault, S_IRUGO, show_temp_fault, NULL, 0, 2),
+};
+
+/* Temp and in attr common to the f71862fg, f71882fg and f71889fg */
+static struct sensor_device_attribute_2 f71862_temp_attr[] = {
SENSOR_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 3),
SENSOR_ATTR_2(temp3_max, S_IRUGO|S_IWUSR, show_temp_max,
store_temp_max, 0, 3),
@@ -989,6 +1011,11 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
data->temp_type[1] = 6;
break;
}
+ } else if (data->type == f71808fg) {
+ reg = f71882fg_read8(data, F71882FG_REG_TEMP_TYPE);
+ data->temp_type[1] = (reg & 0x02) ? 2 : 4;
+ data->temp_type[2] = (reg & 0x04) ? 2 : 4;
+
} else {
reg2 = f71882fg_read8(data, F71882FG_REG_PECI);
if ((reg2 & 0x03) == 0x01)
@@ -1871,7 +1898,8 @@ static ssize_t store_pwm_auto_point_temp(struct device *dev,
val /= 1000;
- if (data->type == f71889fg)
+ if (data->type == f71889fg
+ || data->type == f71808fg)
val = SENSORS_LIMIT(val, -128, 127);
else
val = SENSORS_LIMIT(val, 0, 127);
@@ -1974,8 +2002,28 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
/* fall through! */
case f71862fg:
err = f71882fg_create_sysfs_files(pdev,
- fxxxx_in_temp_attr,
- ARRAY_SIZE(fxxxx_in_temp_attr));
+ f71862_temp_attr,
+ ARRAY_SIZE(f71862_temp_attr));
+ if (err)
+ goto exit_unregister_sysfs;
+ err = f71882fg_create_sysfs_files(pdev,
+ fxxxx_in_attr,
+ ARRAY_SIZE(fxxxx_in_attr));
+ if (err)
+ goto exit_unregister_sysfs;
+ err = f71882fg_create_sysfs_files(pdev,
+ fxxxx_temp_attr,
+ ARRAY_SIZE(fxxxx_temp_attr));
+ break;
+ case f71808fg:
+ err = f71882fg_create_sysfs_files(pdev,
+ f71808_in_attr,
+ ARRAY_SIZE(f71808_in_attr));
+ if (err)
+ goto exit_unregister_sysfs;
+ err = f71882fg_create_sysfs_files(pdev,
+ fxxxx_temp_attr,
+ ARRAY_SIZE(fxxxx_temp_attr));
break;
case f8000:
err = f71882fg_create_sysfs_files(pdev,
@@ -2002,6 +2050,7 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
case f71862fg:
err = (data->pwm_enable & 0x15) != 0x15;
break;
+ case f71808fg:
case f71882fg:
case f71889fg:
err = 0;
@@ -2047,6 +2096,7 @@ static int __devinit f71882fg_probe(struct platform_device *pdev)
f8000_auto_pwm_attr,
ARRAY_SIZE(f8000_auto_pwm_attr));
break;
+ case f71808fg:
case f71889fg:
for (i = 0; i < nr_fans; i++) {
data->pwm_auto_point_mapping[i] =
@@ -2126,8 +2176,22 @@ static int f71882fg_remove(struct platform_device *pdev)
/* fall through! */
case f71862fg:
f71882fg_remove_sysfs_files(pdev,
- fxxxx_in_temp_attr,
- ARRAY_SIZE(fxxxx_in_temp_attr));
+ f71862_temp_attr,
+ ARRAY_SIZE(f71862_temp_attr));
+ f71882fg_remove_sysfs_files(pdev,
+ fxxxx_in_attr,
+ ARRAY_SIZE(fxxxx_in_attr));
+ f71882fg_remove_sysfs_files(pdev,
+ fxxxx_temp_attr,
+ ARRAY_SIZE(fxxxx_temp_attr));
+ break;
+ case f71808fg:
+ f71882fg_remove_sysfs_files(pdev,
+ f71808_in_attr,
+ ARRAY_SIZE(f71808_in_attr));
+ f71882fg_remove_sysfs_files(pdev,
+ fxxxx_temp_attr,
+ ARRAY_SIZE(fxxxx_temp_attr));
break;
case f8000:
f71882fg_remove_sysfs_files(pdev,
@@ -2195,6 +2259,9 @@ static int __init f71882fg_find(int sioaddr, unsigned short *address,
devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);
switch (devid) {
+ case SIO_F71808_ID:
+ sio_data->type = f71808fg;
+ break;
case SIO_F71858_ID:
sio_data->type = f71858fg;
break;
diff --git a/drivers/hwmon/hdaps.c b/drivers/hwmon/hdaps.c
index be2d131e405..bfd42f18924 100644
--- a/drivers/hwmon/hdaps.c
+++ b/drivers/hwmon/hdaps.c
@@ -522,6 +522,7 @@ static struct dmi_system_id __initdata hdaps_whitelist[] = {
HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T42p", HDAPS_BOTH_AXES),
HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T42"),
HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T43"),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T400", HDAPS_BOTH_AXES),
HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T60", HDAPS_BOTH_AXES),
HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61p", HDAPS_BOTH_AXES),
HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61", HDAPS_BOTH_AXES),
diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c
new file mode 100644
index 00000000000..340fc78c8dd
--- /dev/null
+++ b/drivers/hwmon/jc42.c
@@ -0,0 +1,593 @@
+/*
+ * jc42.c - driver for Jedec JC42.4 compliant temperature sensors
+ *
+ * Copyright (c) 2010 Ericsson AB.
+ *
+ * Derived from lm77.c by Andras BALI <drewie@freemail.hu>.
+ *
+ * JC42.4 compliant temperature sensors are typically used on memory modules.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = {
+ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END };
+
+/* JC42 registers. All registers are 16 bit. */
+#define JC42_REG_CAP 0x00
+#define JC42_REG_CONFIG 0x01
+#define JC42_REG_TEMP_UPPER 0x02
+#define JC42_REG_TEMP_LOWER 0x03
+#define JC42_REG_TEMP_CRITICAL 0x04
+#define JC42_REG_TEMP 0x05
+#define JC42_REG_MANID 0x06
+#define JC42_REG_DEVICEID 0x07
+
+/* Status bits in temperature register */
+#define JC42_ALARM_CRIT_BIT 15
+#define JC42_ALARM_MAX_BIT 14
+#define JC42_ALARM_MIN_BIT 13
+
+/* Configuration register defines */
+#define JC42_CFG_CRIT_ONLY (1 << 2)
+#define JC42_CFG_SHUTDOWN (1 << 8)
+#define JC42_CFG_HYST_SHIFT 9
+#define JC42_CFG_HYST_MASK 0x03
+
+/* Capabilities */
+#define JC42_CAP_RANGE (1 << 2)
+
+/* Manufacturer IDs */
+#define ADT_MANID 0x11d4 /* Analog Devices */
+#define MAX_MANID 0x004d /* Maxim */
+#define IDT_MANID 0x00b3 /* IDT */
+#define MCP_MANID 0x0054 /* Microchip */
+#define NXP_MANID 0x1131 /* NXP Semiconductors */
+#define ONS_MANID 0x1b09 /* ON Semiconductor */
+#define STM_MANID 0x104a /* ST Microelectronics */
+
+/* Supported chips */
+
+/* Analog Devices */
+#define ADT7408_DEVID 0x0801
+#define ADT7408_DEVID_MASK 0xffff
+
+/* IDT */
+#define TS3000B3_DEVID 0x2903 /* Also matches TSE2002B3 */
+#define TS3000B3_DEVID_MASK 0xffff
+
+/* Maxim */
+#define MAX6604_DEVID 0x3e00
+#define MAX6604_DEVID_MASK 0xffff
+
+/* Microchip */
+#define MCP98242_DEVID 0x2000
+#define MCP98242_DEVID_MASK 0xfffc
+
+#define MCP98243_DEVID 0x2100
+#define MCP98243_DEVID_MASK 0xfffc
+
+#define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */
+#define MCP9843_DEVID_MASK 0xfffe
+
+/* NXP */
+#define SE97_DEVID 0xa200
+#define SE97_DEVID_MASK 0xfffc
+
+#define SE98_DEVID 0xa100
+#define SE98_DEVID_MASK 0xfffc
+
+/* ON Semiconductor */
+#define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */
+#define CAT6095_DEVID_MASK 0xffe0
+
+/* ST Microelectronics */
+#define STTS424_DEVID 0x0101
+#define STTS424_DEVID_MASK 0xffff
+
+#define STTS424E_DEVID 0x0000
+#define STTS424E_DEVID_MASK 0xfffe
+
+static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 };
+
+struct jc42_chips {
+ u16 manid;
+ u16 devid;
+ u16 devid_mask;
+};
+
+static struct jc42_chips jc42_chips[] = {
+ { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK },
+ { IDT_MANID, TS3000B3_DEVID, TS3000B3_DEVID_MASK },
+ { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK },
+ { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK },
+ { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK },
+ { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK },
+ { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK },
+ { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK },
+ { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK },
+ { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK },
+ { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK },
+};
+
+/* Each client has this additional data */
+struct jc42_data {
+ struct device *hwmon_dev;
+ struct mutex update_lock; /* protect register access */
+ bool extended; /* true if extended range supported */
+ bool valid;
+ unsigned long last_updated; /* In jiffies */
+ u16 orig_config; /* original configuration */
+ u16 config; /* current configuration */
+ u16 temp_input; /* Temperatures */
+ u16 temp_crit;
+ u16 temp_min;
+ u16 temp_max;
+};
+
+static int jc42_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info);
+static int jc42_remove(struct i2c_client *client);
+static int jc42_read_value(struct i2c_client *client, u8 reg);
+static int jc42_write_value(struct i2c_client *client, u8 reg, u16 value);
+
+static struct jc42_data *jc42_update_device(struct device *dev);
+
+static const struct i2c_device_id jc42_id[] = {
+ { "adt7408", 0 },
+ { "cat94ts02", 0 },
+ { "cat6095", 0 },
+ { "jc42", 0 },
+ { "max6604", 0 },
+ { "mcp9805", 0 },
+ { "mcp98242", 0 },
+ { "mcp98243", 0 },
+ { "mcp9843", 0 },
+ { "se97", 0 },
+ { "se97b", 0 },
+ { "se98", 0 },
+ { "stts424", 0 },
+ { "tse2002b3", 0 },
+ { "ts3000b3", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, jc42_id);
+
+#ifdef CONFIG_PM
+
+static int jc42_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct jc42_data *data = i2c_get_clientdata(client);
+
+ data->config |= JC42_CFG_SHUTDOWN;
+ jc42_write_value(client, JC42_REG_CONFIG, data->config);
+ return 0;
+}
+
+static int jc42_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct jc42_data *data = i2c_get_clientdata(client);
+
+ data->config &= ~JC42_CFG_SHUTDOWN;
+ jc42_write_value(client, JC42_REG_CONFIG, data->config);
+ return 0;
+}
+
+static const struct dev_pm_ops jc42_dev_pm_ops = {
+ .suspend = jc42_suspend,
+ .resume = jc42_resume,
+};
+
+#define JC42_DEV_PM_OPS (&jc42_dev_pm_ops)
+#else
+#define JC42_DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+/* This is the driver that will be inserted */
+static struct i2c_driver jc42_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "jc42",
+ .pm = JC42_DEV_PM_OPS,
+ },
+ .probe = jc42_probe,
+ .remove = jc42_remove,
+ .id_table = jc42_id,
+ .detect = jc42_detect,
+ .address_list = normal_i2c,
+};
+
+#define JC42_TEMP_MIN_EXTENDED (-40000)
+#define JC42_TEMP_MIN 0
+#define JC42_TEMP_MAX 125000
+
+static u16 jc42_temp_to_reg(int temp, bool extended)
+{
+ int ntemp = SENSORS_LIMIT(temp,
+ extended ? JC42_TEMP_MIN_EXTENDED :
+ JC42_TEMP_MIN, JC42_TEMP_MAX);
+
+ /* convert from 0.001 to 0.0625 resolution */
+ return (ntemp * 2 / 125) & 0x1fff;
+}
+
+static int jc42_temp_from_reg(s16 reg)
+{
+ reg &= 0x1fff;
+
+ /* sign extend register */
+ if (reg & 0x1000)
+ reg |= 0xf000;
+
+ /* convert from 0.0625 to 0.001 resolution */
+ return reg * 125 / 2;
+}
+
+/* sysfs stuff */
+
+/* read routines for temperature limits */
+#define show(value) \
+static ssize_t show_##value(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct jc42_data *data = jc42_update_device(dev); \
+ if (IS_ERR(data)) \
+ return PTR_ERR(data); \
+ return sprintf(buf, "%d\n", jc42_temp_from_reg(data->value)); \
+}
+
+show(temp_input);
+show(temp_crit);
+show(temp_min);
+show(temp_max);
+
+/* read routines for hysteresis values */
+static ssize_t show_temp_crit_hyst(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct jc42_data *data = jc42_update_device(dev);
+ int temp, hyst;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ temp = jc42_temp_from_reg(data->temp_crit);
+ hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
+ & JC42_CFG_HYST_MASK];
+ return sprintf(buf, "%d\n", temp - hyst);
+}
+
+static ssize_t show_temp_max_hyst(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct jc42_data *data = jc42_update_device(dev);
+ int temp, hyst;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ temp = jc42_temp_from_reg(data->temp_max);
+ hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
+ & JC42_CFG_HYST_MASK];
+ return sprintf(buf, "%d\n", temp - hyst);
+}
+
+/* write routines */
+#define set(value, reg) \
+static ssize_t set_##value(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct jc42_data *data = i2c_get_clientdata(client); \
+ int err, ret = count; \
+ long val; \
+ if (strict_strtol(buf, 10, &val) < 0) \
+ return -EINVAL; \
+ mutex_lock(&data->update_lock); \
+ data->value = jc42_temp_to_reg(val, data->extended); \
+ err = jc42_write_value(client, reg, data->value); \
+ if (err < 0) \
+ ret = err; \
+ mutex_unlock(&data->update_lock); \
+ return ret; \
+}
+
+set(temp_min, JC42_REG_TEMP_LOWER);
+set(temp_max, JC42_REG_TEMP_UPPER);
+set(temp_crit, JC42_REG_TEMP_CRITICAL);
+
+/* JC42.4 compliant chips only support four hysteresis values.
+ * Pick best choice and go from there. */
+static ssize_t set_temp_crit_hyst(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct jc42_data *data = i2c_get_clientdata(client);
+ long val;
+ int diff, hyst;
+ int err;
+ int ret = count;
+
+ if (strict_strtoul(buf, 10, &val) < 0)
+ return -EINVAL;
+
+ diff = jc42_temp_from_reg(data->temp_crit) - val;
+ hyst = 0;
+ if (diff > 0) {
+ if (diff < 2250)
+ hyst = 1; /* 1.5 degrees C */
+ else if (diff < 4500)
+ hyst = 2; /* 3.0 degrees C */
+ else
+ hyst = 3; /* 6.0 degrees C */
+ }
+
+ mutex_lock(&data->update_lock);
+ data->config = (data->config
+ & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT))
+ | (hyst << JC42_CFG_HYST_SHIFT);
+ err = jc42_write_value(client, JC42_REG_CONFIG, data->config);
+ if (err < 0)
+ ret = err;
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static ssize_t show_alarm(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ u16 bit = to_sensor_dev_attr(attr)->index;
+ struct jc42_data *data = jc42_update_device(dev);
+ u16 val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = data->temp_input;
+ if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY))
+ val = 0;
+ return sprintf(buf, "%u\n", (val >> bit) & 1);
+}
+
+static DEVICE_ATTR(temp1_input, S_IRUGO,
+ show_temp_input, NULL);
+static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO,
+ show_temp_crit, set_temp_crit);
+static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
+ show_temp_min, set_temp_min);
+static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
+ show_temp_max, set_temp_max);
+
+static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
+ show_temp_crit_hyst, set_temp_crit_hyst);
+static DEVICE_ATTR(temp1_max_hyst, S_IRUGO,
+ show_temp_max_hyst, NULL);
+
+static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
+ JC42_ALARM_CRIT_BIT);
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
+ JC42_ALARM_MIN_BIT);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
+ JC42_ALARM_MAX_BIT);
+
+static struct attribute *jc42_attributes[] = {
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp1_crit.attr,
+ &dev_attr_temp1_min.attr,
+ &dev_attr_temp1_max.attr,
+ &dev_attr_temp1_crit_hyst.attr,
+ &dev_attr_temp1_max_hyst.attr,
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group jc42_group = {
+ .attrs = jc42_attributes,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int jc42_detect(struct i2c_client *new_client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = new_client->adapter;
+ int i, config, cap, manid, devid;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ cap = jc42_read_value(new_client, JC42_REG_CAP);
+ config = jc42_read_value(new_client, JC42_REG_CONFIG);
+ manid = jc42_read_value(new_client, JC42_REG_MANID);
+ devid = jc42_read_value(new_client, JC42_REG_DEVICEID);
+
+ if (cap < 0 || config < 0 || manid < 0 || devid < 0)
+ return -ENODEV;
+
+ if ((cap & 0xff00) || (config & 0xf800))
+ return -ENODEV;
+
+ for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
+ struct jc42_chips *chip = &jc42_chips[i];
+ if (manid == chip->manid &&
+ (devid & chip->devid_mask) == chip->devid) {
+ strlcpy(info->type, "jc42", I2C_NAME_SIZE);
+ return 0;
+ }
+ }
+ return -ENODEV;
+}
+
+static int jc42_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct jc42_data *data;
+ int config, cap, err;
+
+ data = kzalloc(sizeof(struct jc42_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(new_client, data);
+ mutex_init(&data->update_lock);
+
+ cap = jc42_read_value(new_client, JC42_REG_CAP);
+ if (cap < 0) {
+ err = -EINVAL;
+ goto exit_free;
+ }
+ data->extended = !!(cap & JC42_CAP_RANGE);
+
+ config = jc42_read_value(new_client, JC42_REG_CONFIG);
+ if (config < 0) {
+ err = -EINVAL;
+ goto exit_free;
+ }
+ data->orig_config = config;
+ if (config & JC42_CFG_SHUTDOWN) {
+ config &= ~JC42_CFG_SHUTDOWN;
+ jc42_write_value(new_client, JC42_REG_CONFIG, config);
+ }
+ data->config = config;
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&new_client->dev.kobj, &jc42_group);
+ if (err)
+ goto exit_free;
+
+ data->hwmon_dev = hwmon_device_register(&new_client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove;
+ }
+
+ return 0;
+
+exit_remove:
+ sysfs_remove_group(&new_client->dev.kobj, &jc42_group);
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int jc42_remove(struct i2c_client *client)
+{
+ struct jc42_data *data = i2c_get_clientdata(client);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &jc42_group);
+ if (data->config != data->orig_config)
+ jc42_write_value(client, JC42_REG_CONFIG, data->orig_config);
+ kfree(data);
+ return 0;
+}
+
+/* All registers are word-sized. */
+static int jc42_read_value(struct i2c_client *client, u8 reg)
+{
+ int ret = i2c_smbus_read_word_data(client, reg);
+ if (ret < 0)
+ return ret;
+ return swab16(ret);
+}
+
+static int jc42_write_value(struct i2c_client *client, u8 reg, u16 value)
+{
+ return i2c_smbus_write_word_data(client, reg, swab16(value));
+}
+
+static struct jc42_data *jc42_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct jc42_data *data = i2c_get_clientdata(client);
+ struct jc42_data *ret = data;
+ int val;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ val = jc42_read_value(client, JC42_REG_TEMP);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp_input = val;
+
+ val = jc42_read_value(client, JC42_REG_TEMP_CRITICAL);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp_crit = val;
+
+ val = jc42_read_value(client, JC42_REG_TEMP_LOWER);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp_min = val;
+
+ val = jc42_read_value(client, JC42_REG_TEMP_UPPER);
+ if (val < 0) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp_max = val;
+
+ data->last_updated = jiffies;
+ data->valid = true;
+ }
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static int __init sensors_jc42_init(void)
+{
+ return i2c_add_driver(&jc42_driver);
+}
+
+static void __exit sensors_jc42_exit(void)
+{
+ i2c_del_driver(&jc42_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
+MODULE_DESCRIPTION("JC42 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_jc42_init);
+module_exit(sensors_jc42_exit);
diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c
new file mode 100644
index 00000000000..425df5bccd4
--- /dev/null
+++ b/drivers/hwmon/smm665.c
@@ -0,0 +1,743 @@
+/*
+ * Driver for SMM665 Power Controller / Monitor
+ *
+ * Copyright (C) 2010 Ericsson AB.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This driver should also work for SMM465, SMM764, and SMM766, but is untested
+ * for those chips. Only monitoring functionality is implemented.
+ *
+ * Datasheets:
+ * http://www.summitmicro.com/prod_select/summary/SMM665/SMM665B_2089_20.pdf
+ * http://www.summitmicro.com/prod_select/summary/SMM766B/SMM766B_2122.pdf
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/delay.h>
+
+/* Internal reference voltage (VREF, x 1000 */
+#define SMM665_VREF_ADC_X1000 1250
+
+/* module parameters */
+static int vref = SMM665_VREF_ADC_X1000;
+module_param(vref, int, 0);
+MODULE_PARM_DESC(vref, "Reference voltage in mV");
+
+enum chips { smm465, smm665, smm665c, smm764, smm766 };
+
+/*
+ * ADC channel addresses
+ */
+#define SMM665_MISC16_ADC_DATA_A 0x00
+#define SMM665_MISC16_ADC_DATA_B 0x01
+#define SMM665_MISC16_ADC_DATA_C 0x02
+#define SMM665_MISC16_ADC_DATA_D 0x03
+#define SMM665_MISC16_ADC_DATA_E 0x04
+#define SMM665_MISC16_ADC_DATA_F 0x05
+#define SMM665_MISC16_ADC_DATA_VDD 0x06
+#define SMM665_MISC16_ADC_DATA_12V 0x07
+#define SMM665_MISC16_ADC_DATA_INT_TEMP 0x08
+#define SMM665_MISC16_ADC_DATA_AIN1 0x09
+#define SMM665_MISC16_ADC_DATA_AIN2 0x0a
+
+/*
+ * Command registers
+ */
+#define SMM665_MISC8_CMD_STS 0x80
+#define SMM665_MISC8_STATUS1 0x81
+#define SMM665_MISC8_STATUSS2 0x82
+#define SMM665_MISC8_IO_POLARITY 0x83
+#define SMM665_MISC8_PUP_POLARITY 0x84
+#define SMM665_MISC8_ADOC_STATUS1 0x85
+#define SMM665_MISC8_ADOC_STATUS2 0x86
+#define SMM665_MISC8_WRITE_PROT 0x87
+#define SMM665_MISC8_STS_TRACK 0x88
+
+/*
+ * Configuration registers and register groups
+ */
+#define SMM665_ADOC_ENABLE 0x0d
+#define SMM665_LIMIT_BASE 0x80 /* First limit register */
+
+/*
+ * Limit register bit masks
+ */
+#define SMM665_TRIGGER_RST 0x8000
+#define SMM665_TRIGGER_HEALTHY 0x4000
+#define SMM665_TRIGGER_POWEROFF 0x2000
+#define SMM665_TRIGGER_SHUTDOWN 0x1000
+#define SMM665_ADC_MASK 0x03ff
+
+#define smm665_is_critical(lim) ((lim) & (SMM665_TRIGGER_RST \
+ | SMM665_TRIGGER_POWEROFF \
+ | SMM665_TRIGGER_SHUTDOWN))
+/*
+ * Fault register bit definitions
+ * Values are merged from status registers 1/2,
+ * with status register 1 providing the upper 8 bits.
+ */
+#define SMM665_FAULT_A 0x0001
+#define SMM665_FAULT_B 0x0002
+#define SMM665_FAULT_C 0x0004
+#define SMM665_FAULT_D 0x0008
+#define SMM665_FAULT_E 0x0010
+#define SMM665_FAULT_F 0x0020
+#define SMM665_FAULT_VDD 0x0040
+#define SMM665_FAULT_12V 0x0080
+#define SMM665_FAULT_TEMP 0x0100
+#define SMM665_FAULT_AIN1 0x0200
+#define SMM665_FAULT_AIN2 0x0400
+
+/*
+ * I2C Register addresses
+ *
+ * The configuration register needs to be the configured base register.
+ * The command/status register address is derived from it.
+ */
+#define SMM665_REGMASK 0x78
+#define SMM665_CMDREG_BASE 0x48
+#define SMM665_CONFREG_BASE 0x50
+
+/*
+ * Equations given by chip manufacturer to calculate voltage/temperature values
+ * vref = Reference voltage on VREF_ADC pin (module parameter)
+ * adc = 10bit ADC value read back from registers
+ */
+
+/* Voltage A-F and VDD */
+#define SMM665_VMON_ADC_TO_VOLTS(adc) ((adc) * vref / 256)
+
+/* Voltage 12VIN */
+#define SMM665_12VIN_ADC_TO_VOLTS(adc) ((adc) * vref * 3 / 256)
+
+/* Voltage AIN1, AIN2 */
+#define SMM665_AIN_ADC_TO_VOLTS(adc) ((adc) * vref / 512)
+
+/* Temp Sensor */
+#define SMM665_TEMP_ADC_TO_CELSIUS(adc) ((adc) <= 511) ? \
+ ((int)(adc) * 1000 / 4) : \
+ (((int)(adc) - 0x400) * 1000 / 4)
+
+#define SMM665_NUM_ADC 11
+
+/*
+ * Chip dependent ADC conversion time, in uS
+ */
+#define SMM665_ADC_WAIT_SMM665 70
+#define SMM665_ADC_WAIT_SMM766 185
+
+struct smm665_data {
+ enum chips type;
+ int conversion_time; /* ADC conversion time */
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ bool valid;
+ unsigned long last_updated; /* in jiffies */
+ u16 adc[SMM665_NUM_ADC]; /* adc values (raw) */
+ u16 faults; /* fault status */
+ /* The following values are in mV */
+ int critical_min_limit[SMM665_NUM_ADC];
+ int alarm_min_limit[SMM665_NUM_ADC];
+ int critical_max_limit[SMM665_NUM_ADC];
+ int alarm_max_limit[SMM665_NUM_ADC];
+ struct i2c_client *cmdreg;
+};
+
+/*
+ * smm665_read16()
+ *
+ * Read 16 bit value from <reg>, <reg+1>. Upper 8 bits are in <reg>.
+ */
+static int smm665_read16(struct i2c_client *client, int reg)
+{
+ int rv, val;
+
+ rv = i2c_smbus_read_byte_data(client, reg);
+ if (rv < 0)
+ return rv;
+ val = rv << 8;
+ rv = i2c_smbus_read_byte_data(client, reg + 1);
+ if (rv < 0)
+ return rv;
+ val |= rv;
+ return val;
+}
+
+/*
+ * Read adc value.
+ */
+static int smm665_read_adc(struct smm665_data *data, int adc)
+{
+ struct i2c_client *client = data->cmdreg;
+ int rv;
+ int radc;
+
+ /*
+ * Algorithm for reading ADC, per SMM665 datasheet
+ *
+ * {[S][addr][W][Ack]} {[offset][Ack]} {[S][addr][R][Nack]}
+ * [wait conversion time]
+ * {[S][addr][R][Ack]} {[datahi][Ack]} {[datalo][Ack][P]}
+ *
+ * To implement the first part of this exchange,
+ * do a full read transaction and expect a failure/Nack.
+ * This sets up the address pointer on the SMM665
+ * and starts the ADC conversion.
+ * Then do a two-byte read transaction.
+ */
+ rv = i2c_smbus_read_byte_data(client, adc << 3);
+ if (rv != -ENXIO) {
+ /*
+ * We expect ENXIO to reflect NACK
+ * (per Documentation/i2c/fault-codes).
+ * Everything else is an error.
+ */
+ dev_dbg(&client->dev,
+ "Unexpected return code %d when setting ADC index", rv);
+ return (rv < 0) ? rv : -EIO;
+ }
+
+ udelay(data->conversion_time);
+
+ /*
+ * Now read two bytes.
+ *
+ * Neither i2c_smbus_read_byte() nor
+ * i2c_smbus_read_block_data() worked here,
+ * so use i2c_smbus_read_word_data() instead.
+ * We could also try to use i2c_master_recv(),
+ * but that is not always supported.
+ */
+ rv = i2c_smbus_read_word_data(client, 0);
+ if (rv < 0) {
+ dev_dbg(&client->dev, "Failed to read ADC value: error %d", rv);
+ return -1;
+ }
+ /*
+ * Validate/verify readback adc channel (in bit 11..14).
+ * High byte is in lower 8 bit of rv, so only shift by 3.
+ */
+ radc = (rv >> 3) & 0x0f;
+ if (radc != adc) {
+ dev_dbg(&client->dev, "Unexpected RADC: Expected %d got %d",
+ adc, radc);
+ return -EIO;
+ }
+ /*
+ * Chip replies with H/L, while SMBus expects L/H.
+ * Thus, byte order is reversed, and we have to swap
+ * the result.
+ */
+ rv = swab16(rv) & SMM665_ADC_MASK;
+
+ return rv;
+}
+
+static struct smm665_data *smm665_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct smm665_data *data = i2c_get_clientdata(client);
+ struct smm665_data *ret = data;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ int i, val;
+
+ /*
+ * read status registers
+ */
+ val = smm665_read16(client, SMM665_MISC8_STATUS1);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->faults = val;
+
+ /* Read adc registers */
+ for (i = 0; i < SMM665_NUM_ADC; i++) {
+ val = smm665_read_adc(data, i);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->adc[i] = val;
+ }
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+/* Return converted value from given adc */
+static int smm665_convert(u16 adcval, int index)
+{
+ int val = 0;
+
+ switch (index) {
+ case SMM665_MISC16_ADC_DATA_12V:
+ val = SMM665_12VIN_ADC_TO_VOLTS(adcval & SMM665_ADC_MASK);
+ break;
+
+ case SMM665_MISC16_ADC_DATA_VDD:
+ case SMM665_MISC16_ADC_DATA_A:
+ case SMM665_MISC16_ADC_DATA_B:
+ case SMM665_MISC16_ADC_DATA_C:
+ case SMM665_MISC16_ADC_DATA_D:
+ case SMM665_MISC16_ADC_DATA_E:
+ case SMM665_MISC16_ADC_DATA_F:
+ val = SMM665_VMON_ADC_TO_VOLTS(adcval & SMM665_ADC_MASK);
+ break;
+
+ case SMM665_MISC16_ADC_DATA_AIN1:
+ case SMM665_MISC16_ADC_DATA_AIN2:
+ val = SMM665_AIN_ADC_TO_VOLTS(adcval & SMM665_ADC_MASK);
+ break;
+
+ case SMM665_MISC16_ADC_DATA_INT_TEMP:
+ val = SMM665_TEMP_ADC_TO_CELSIUS(adcval & SMM665_ADC_MASK);
+ break;
+
+ default:
+ /* If we get here, the developer messed up */
+ WARN_ON_ONCE(1);
+ break;
+ }
+
+ return val;
+}
+
+static int smm665_get_min(struct device *dev, int index)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct smm665_data *data = i2c_get_clientdata(client);
+
+ return data->alarm_min_limit[index];
+}
+
+static int smm665_get_max(struct device *dev, int index)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct smm665_data *data = i2c_get_clientdata(client);
+
+ return data->alarm_max_limit[index];
+}
+
+static int smm665_get_lcrit(struct device *dev, int index)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct smm665_data *data = i2c_get_clientdata(client);
+
+ return data->critical_min_limit[index];
+}
+
+static int smm665_get_crit(struct device *dev, int index)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct smm665_data *data = i2c_get_clientdata(client);
+
+ return data->critical_max_limit[index];
+}
+
+static ssize_t smm665_show_crit_alarm(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct smm665_data *data = smm665_update_device(dev);
+ int val = 0;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ if (data->faults & (1 << attr->index))
+ val = 1;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t smm665_show_input(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct smm665_data *data = smm665_update_device(dev);
+ int adc = attr->index;
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = smm665_convert(data->adc[adc], adc);
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+#define SMM665_SHOW(what) \
+ static ssize_t smm665_show_##what(struct device *dev, \
+ struct device_attribute *da, char *buf) \
+{ \
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
+ const int val = smm665_get_##what(dev, attr->index); \
+ return snprintf(buf, PAGE_SIZE, "%d\n", val); \
+}
+
+SMM665_SHOW(min);
+SMM665_SHOW(max);
+SMM665_SHOW(lcrit);
+SMM665_SHOW(crit);
+
+/* These macros are used below in constructing device attribute objects
+ * for use with sysfs_create_group() to make a sysfs device file
+ * for each register.
+ */
+
+#define SMM665_ATTR(name, type, cmd_idx) \
+ static SENSOR_DEVICE_ATTR(name##_##type, S_IRUGO, \
+ smm665_show_##type, NULL, cmd_idx)
+
+/* Construct a sensor_device_attribute structure for each register */
+
+/* Input voltages */
+SMM665_ATTR(in1, input, SMM665_MISC16_ADC_DATA_12V);
+SMM665_ATTR(in2, input, SMM665_MISC16_ADC_DATA_VDD);
+SMM665_ATTR(in3, input, SMM665_MISC16_ADC_DATA_A);
+SMM665_ATTR(in4, input, SMM665_MISC16_ADC_DATA_B);
+SMM665_ATTR(in5, input, SMM665_MISC16_ADC_DATA_C);
+SMM665_ATTR(in6, input, SMM665_MISC16_ADC_DATA_D);
+SMM665_ATTR(in7, input, SMM665_MISC16_ADC_DATA_E);
+SMM665_ATTR(in8, input, SMM665_MISC16_ADC_DATA_F);
+SMM665_ATTR(in9, input, SMM665_MISC16_ADC_DATA_AIN1);
+SMM665_ATTR(in10, input, SMM665_MISC16_ADC_DATA_AIN2);
+
+/* Input voltages min */
+SMM665_ATTR(in1, min, SMM665_MISC16_ADC_DATA_12V);
+SMM665_ATTR(in2, min, SMM665_MISC16_ADC_DATA_VDD);
+SMM665_ATTR(in3, min, SMM665_MISC16_ADC_DATA_A);
+SMM665_ATTR(in4, min, SMM665_MISC16_ADC_DATA_B);
+SMM665_ATTR(in5, min, SMM665_MISC16_ADC_DATA_C);
+SMM665_ATTR(in6, min, SMM665_MISC16_ADC_DATA_D);
+SMM665_ATTR(in7, min, SMM665_MISC16_ADC_DATA_E);
+SMM665_ATTR(in8, min, SMM665_MISC16_ADC_DATA_F);
+SMM665_ATTR(in9, min, SMM665_MISC16_ADC_DATA_AIN1);
+SMM665_ATTR(in10, min, SMM665_MISC16_ADC_DATA_AIN2);
+
+/* Input voltages max */
+SMM665_ATTR(in1, max, SMM665_MISC16_ADC_DATA_12V);
+SMM665_ATTR(in2, max, SMM665_MISC16_ADC_DATA_VDD);
+SMM665_ATTR(in3, max, SMM665_MISC16_ADC_DATA_A);
+SMM665_ATTR(in4, max, SMM665_MISC16_ADC_DATA_B);
+SMM665_ATTR(in5, max, SMM665_MISC16_ADC_DATA_C);
+SMM665_ATTR(in6, max, SMM665_MISC16_ADC_DATA_D);
+SMM665_ATTR(in7, max, SMM665_MISC16_ADC_DATA_E);
+SMM665_ATTR(in8, max, SMM665_MISC16_ADC_DATA_F);
+SMM665_ATTR(in9, max, SMM665_MISC16_ADC_DATA_AIN1);
+SMM665_ATTR(in10, max, SMM665_MISC16_ADC_DATA_AIN2);
+
+/* Input voltages lcrit */
+SMM665_ATTR(in1, lcrit, SMM665_MISC16_ADC_DATA_12V);
+SMM665_ATTR(in2, lcrit, SMM665_MISC16_ADC_DATA_VDD);
+SMM665_ATTR(in3, lcrit, SMM665_MISC16_ADC_DATA_A);
+SMM665_ATTR(in4, lcrit, SMM665_MISC16_ADC_DATA_B);
+SMM665_ATTR(in5, lcrit, SMM665_MISC16_ADC_DATA_C);
+SMM665_ATTR(in6, lcrit, SMM665_MISC16_ADC_DATA_D);
+SMM665_ATTR(in7, lcrit, SMM665_MISC16_ADC_DATA_E);
+SMM665_ATTR(in8, lcrit, SMM665_MISC16_ADC_DATA_F);
+SMM665_ATTR(in9, lcrit, SMM665_MISC16_ADC_DATA_AIN1);
+SMM665_ATTR(in10, lcrit, SMM665_MISC16_ADC_DATA_AIN2);
+
+/* Input voltages crit */
+SMM665_ATTR(in1, crit, SMM665_MISC16_ADC_DATA_12V);
+SMM665_ATTR(in2, crit, SMM665_MISC16_ADC_DATA_VDD);
+SMM665_ATTR(in3, crit, SMM665_MISC16_ADC_DATA_A);
+SMM665_ATTR(in4, crit, SMM665_MISC16_ADC_DATA_B);
+SMM665_ATTR(in5, crit, SMM665_MISC16_ADC_DATA_C);
+SMM665_ATTR(in6, crit, SMM665_MISC16_ADC_DATA_D);
+SMM665_ATTR(in7, crit, SMM665_MISC16_ADC_DATA_E);
+SMM665_ATTR(in8, crit, SMM665_MISC16_ADC_DATA_F);
+SMM665_ATTR(in9, crit, SMM665_MISC16_ADC_DATA_AIN1);
+SMM665_ATTR(in10, crit, SMM665_MISC16_ADC_DATA_AIN2);
+
+/* critical alarms */
+SMM665_ATTR(in1, crit_alarm, SMM665_FAULT_12V);
+SMM665_ATTR(in2, crit_alarm, SMM665_FAULT_VDD);
+SMM665_ATTR(in3, crit_alarm, SMM665_FAULT_A);
+SMM665_ATTR(in4, crit_alarm, SMM665_FAULT_B);
+SMM665_ATTR(in5, crit_alarm, SMM665_FAULT_C);
+SMM665_ATTR(in6, crit_alarm, SMM665_FAULT_D);
+SMM665_ATTR(in7, crit_alarm, SMM665_FAULT_E);
+SMM665_ATTR(in8, crit_alarm, SMM665_FAULT_F);
+SMM665_ATTR(in9, crit_alarm, SMM665_FAULT_AIN1);
+SMM665_ATTR(in10, crit_alarm, SMM665_FAULT_AIN2);
+
+/* Temperature */
+SMM665_ATTR(temp1, input, SMM665_MISC16_ADC_DATA_INT_TEMP);
+SMM665_ATTR(temp1, min, SMM665_MISC16_ADC_DATA_INT_TEMP);
+SMM665_ATTR(temp1, max, SMM665_MISC16_ADC_DATA_INT_TEMP);
+SMM665_ATTR(temp1, lcrit, SMM665_MISC16_ADC_DATA_INT_TEMP);
+SMM665_ATTR(temp1, crit, SMM665_MISC16_ADC_DATA_INT_TEMP);
+SMM665_ATTR(temp1, crit_alarm, SMM665_FAULT_TEMP);
+
+/*
+ * Finally, construct an array of pointers to members of the above objects,
+ * as required for sysfs_create_group()
+ */
+static struct attribute *smm665_attributes[] = {
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in1_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in1_crit.dev_attr.attr,
+ &sensor_dev_attr_in1_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in2_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in2_crit.dev_attr.attr,
+ &sensor_dev_attr_in2_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in3_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in3_crit.dev_attr.attr,
+ &sensor_dev_attr_in3_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in4_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in4_crit.dev_attr.attr,
+ &sensor_dev_attr_in4_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in5_min.dev_attr.attr,
+ &sensor_dev_attr_in5_max.dev_attr.attr,
+ &sensor_dev_attr_in5_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in5_crit.dev_attr.attr,
+ &sensor_dev_attr_in5_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in6_input.dev_attr.attr,
+ &sensor_dev_attr_in6_min.dev_attr.attr,
+ &sensor_dev_attr_in6_max.dev_attr.attr,
+ &sensor_dev_attr_in6_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in6_crit.dev_attr.attr,
+ &sensor_dev_attr_in6_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in7_input.dev_attr.attr,
+ &sensor_dev_attr_in7_min.dev_attr.attr,
+ &sensor_dev_attr_in7_max.dev_attr.attr,
+ &sensor_dev_attr_in7_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in7_crit.dev_attr.attr,
+ &sensor_dev_attr_in7_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in8_input.dev_attr.attr,
+ &sensor_dev_attr_in8_min.dev_attr.attr,
+ &sensor_dev_attr_in8_max.dev_attr.attr,
+ &sensor_dev_attr_in8_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in8_crit.dev_attr.attr,
+ &sensor_dev_attr_in8_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in9_input.dev_attr.attr,
+ &sensor_dev_attr_in9_min.dev_attr.attr,
+ &sensor_dev_attr_in9_max.dev_attr.attr,
+ &sensor_dev_attr_in9_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in9_crit.dev_attr.attr,
+ &sensor_dev_attr_in9_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_in10_input.dev_attr.attr,
+ &sensor_dev_attr_in10_min.dev_attr.attr,
+ &sensor_dev_attr_in10_max.dev_attr.attr,
+ &sensor_dev_attr_in10_lcrit.dev_attr.attr,
+ &sensor_dev_attr_in10_crit.dev_attr.attr,
+ &sensor_dev_attr_in10_crit_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_lcrit.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+
+ NULL,
+};
+
+static const struct attribute_group smm665_group = {
+ .attrs = smm665_attributes,
+};
+
+static int smm665_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct smm665_data *data;
+ int i, ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
+ | I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ if (i2c_smbus_read_byte_data(client, SMM665_ADOC_ENABLE) < 0)
+ return -ENODEV;
+
+ ret = -ENOMEM;
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ goto out_return;
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ data->type = id->driver_data;
+ data->cmdreg = i2c_new_dummy(adapter, (client->addr & ~SMM665_REGMASK)
+ | SMM665_CMDREG_BASE);
+ if (!data->cmdreg)
+ goto out_kfree;
+
+ switch (data->type) {
+ case smm465:
+ case smm665:
+ data->conversion_time = SMM665_ADC_WAIT_SMM665;
+ break;
+ case smm665c:
+ case smm764:
+ case smm766:
+ data->conversion_time = SMM665_ADC_WAIT_SMM766;
+ break;
+ }
+
+ ret = -ENODEV;
+ if (i2c_smbus_read_byte_data(data->cmdreg, SMM665_MISC8_CMD_STS) < 0)
+ goto out_unregister;
+
+ /*
+ * Read limits.
+ *
+ * Limit registers start with register SMM665_LIMIT_BASE.
+ * Each channel uses 8 registers, providing four limit values
+ * per channel. Each limit value requires two registers, with the
+ * high byte in the first register and the low byte in the second
+ * register. The first two limits are under limit values, followed
+ * by two over limit values.
+ *
+ * Limit register order matches the ADC register order, so we use
+ * ADC register defines throughout the code to index limit registers.
+ *
+ * We save the first retrieved value both as "critical" and "alarm"
+ * value. The second value overwrites either the critical or the
+ * alarm value, depending on its configuration. This ensures that both
+ * critical and alarm values are initialized, even if both registers are
+ * configured as critical or non-critical.
+ */
+ for (i = 0; i < SMM665_NUM_ADC; i++) {
+ int val;
+
+ val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8);
+ if (unlikely(val < 0))
+ goto out_unregister;
+ data->critical_min_limit[i] = data->alarm_min_limit[i]
+ = smm665_convert(val, i);
+ val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 2);
+ if (unlikely(val < 0))
+ goto out_unregister;
+ if (smm665_is_critical(val))
+ data->critical_min_limit[i] = smm665_convert(val, i);
+ else
+ data->alarm_min_limit[i] = smm665_convert(val, i);
+ val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 4);
+ if (unlikely(val < 0))
+ goto out_unregister;
+ data->critical_max_limit[i] = data->alarm_max_limit[i]
+ = smm665_convert(val, i);
+ val = smm665_read16(client, SMM665_LIMIT_BASE + i * 8 + 6);
+ if (unlikely(val < 0))
+ goto out_unregister;
+ if (smm665_is_critical(val))
+ data->critical_max_limit[i] = smm665_convert(val, i);
+ else
+ data->alarm_max_limit[i] = smm665_convert(val, i);
+ }
+
+ /* Register sysfs hooks */
+ ret = sysfs_create_group(&client->dev.kobj, &smm665_group);
+ if (ret)
+ goto out_unregister;
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ ret = PTR_ERR(data->hwmon_dev);
+ goto out_remove_group;
+ }
+
+ return 0;
+
+out_remove_group:
+ sysfs_remove_group(&client->dev.kobj, &smm665_group);
+out_unregister:
+ i2c_unregister_device(data->cmdreg);
+out_kfree:
+ kfree(data);
+out_return:
+ return ret;
+}
+
+static int smm665_remove(struct i2c_client *client)
+{
+ struct smm665_data *data = i2c_get_clientdata(client);
+
+ i2c_unregister_device(data->cmdreg);
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &smm665_group);
+
+ kfree(data);
+
+ return 0;
+}
+
+static const struct i2c_device_id smm665_id[] = {
+ {"smm465", smm465},
+ {"smm665", smm665},
+ {"smm665c", smm665c},
+ {"smm764", smm764},
+ {"smm766", smm766},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, smm665_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver smm665_driver = {
+ .driver = {
+ .name = "smm665",
+ },
+ .probe = smm665_probe,
+ .remove = smm665_remove,
+ .id_table = smm665_id,
+};
+
+static int __init smm665_init(void)
+{
+ return i2c_add_driver(&smm665_driver);
+}
+
+static void __exit smm665_exit(void)
+{
+ i2c_del_driver(&smm665_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck");
+MODULE_DESCRIPTION("SMM665 driver");
+MODULE_LICENSE("GPL");
+
+module_init(smm665_init);
+module_exit(smm665_exit);
diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index 05edd75abca..a9cf7683163 100644
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -205,8 +205,8 @@ struct atp {
bool overflow_warned;
int x_old; /* last reported x/y, */
int y_old; /* used for smoothing */
- u8 xy_cur[ATP_XSENSORS + ATP_YSENSORS];
- u8 xy_old[ATP_XSENSORS + ATP_YSENSORS];
+ signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
+ signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
int idlecount; /* number of empty packets */
struct work_struct work;
@@ -531,7 +531,7 @@ static void atp_complete_geyser_1_2(struct urb *urb)
for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
/* accumulate the change */
- int change = dev->xy_old[i] - dev->xy_cur[i];
+ signed char change = dev->xy_old[i] - dev->xy_cur[i];
dev->xy_acc[i] -= change;
/* prevent down drifting */
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 488f2547229..0b591b65824 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -304,6 +304,23 @@ config SENSORS_TSL2550
This driver can also be built as a module. If so, the module
will be called tsl2550.
+config SENSORS_BH1780
+ tristate "ROHM BH1780GLI ambient light sensor"
+ depends on I2C && SYSFS
+ help
+ If you say yes here you get support for the ROHM BH1780GLI
+ ambient light sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called bh1780gli.
+
+config HMC6352
+ tristate "Honeywell HMC6352 compass"
+ depends on I2C
+ help
+ This driver provides support for the Honeywell HMC6352 compass,
+ providing configuration and heading data via sysfs.
+
config EP93XX_PWM
tristate "EP93xx PWM support"
depends on ARCH_EP93XX
@@ -363,6 +380,16 @@ config ARM_CHARLCD
line and the Linux version on the second line, but that's
still useful.
+config BMP085
+ tristate "BMP085 digital pressure sensor"
+ depends on I2C && SYSFS
+ help
+ If you say yes here you get support for the Bosch Sensortec
+ BMP086 digital pressure sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bmp085.
+
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 67552d6e932..255a80dc9d7 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -9,11 +9,13 @@ obj-$(CONFIG_AD525X_DPOT_SPI) += ad525x_dpot-spi.o
obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o
+obj-$(CONFIG_BMP085) += bmp085.o
obj-$(CONFIG_ICS932S401) += ics932s401.o
obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o
obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o
obj-$(CONFIG_PHANTOM) += phantom.o
+obj-$(CONFIG_SENSORS_BH1780) += bh1780gli.o
obj-$(CONFIG_SGI_IOC4) += ioc4.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
@@ -28,6 +30,7 @@ obj-$(CONFIG_DS1682) += ds1682.o
obj-$(CONFIG_TI_DAC7512) += ti_dac7512.o
obj-$(CONFIG_C2PORT) += c2port/
obj-$(CONFIG_IWMC3200TOP) += iwmc3200top/
+obj-$(CONFIG_HMC6352) += hmc6352.o
obj-y += eeprom/
obj-y += cb710/
obj-$(CONFIG_VMWARE_BALLOON) += vmware_balloon.o
diff --git a/drivers/misc/bh1780gli.c b/drivers/misc/bh1780gli.c
new file mode 100644
index 00000000000..714c6b48731
--- /dev/null
+++ b/drivers/misc/bh1780gli.c
@@ -0,0 +1,273 @@
+/*
+ * bh1780gli.c
+ * ROHM Ambient Light Sensor Driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#define BH1780_REG_CONTROL 0x80
+#define BH1780_REG_PARTID 0x8A
+#define BH1780_REG_MANFID 0x8B
+#define BH1780_REG_DLOW 0x8C
+#define BH1780_REG_DHIGH 0x8D
+
+#define BH1780_REVMASK (0xf)
+#define BH1780_POWMASK (0x3)
+#define BH1780_POFF (0x0)
+#define BH1780_PON (0x3)
+
+/* power on settling time in ms */
+#define BH1780_PON_DELAY 2
+
+struct bh1780_data {
+ struct i2c_client *client;
+ int power_state;
+ /* lock for sysfs operations */
+ struct mutex lock;
+};
+
+static int bh1780_write(struct bh1780_data *ddata, u8 reg, u8 val, char *msg)
+{
+ int ret = i2c_smbus_write_byte_data(ddata->client, reg, val);
+ if (ret < 0)
+ dev_err(&ddata->client->dev,
+ "i2c_smbus_write_byte_data failed error %d\
+ Register (%s)\n", ret, msg);
+ return ret;
+}
+
+static int bh1780_read(struct bh1780_data *ddata, u8 reg, char *msg)
+{
+ int ret = i2c_smbus_read_byte_data(ddata->client, reg);
+ if (ret < 0)
+ dev_err(&ddata->client->dev,
+ "i2c_smbus_read_byte_data failed error %d\
+ Register (%s)\n", ret, msg);
+ return ret;
+}
+
+static ssize_t bh1780_show_lux(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct bh1780_data *ddata = platform_get_drvdata(pdev);
+ int lsb, msb;
+
+ lsb = bh1780_read(ddata, BH1780_REG_DLOW, "DLOW");
+ if (lsb < 0)
+ return lsb;
+
+ msb = bh1780_read(ddata, BH1780_REG_DHIGH, "DHIGH");
+ if (msb < 0)
+ return msb;
+
+ return sprintf(buf, "%d\n", (msb << 8) | lsb);
+}
+
+static ssize_t bh1780_show_power_state(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct bh1780_data *ddata = platform_get_drvdata(pdev);
+ int state;
+
+ state = bh1780_read(ddata, BH1780_REG_CONTROL, "CONTROL");
+ if (state < 0)
+ return state;
+
+ return sprintf(buf, "%d\n", state & BH1780_POWMASK);
+}
+
+static ssize_t bh1780_store_power_state(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct bh1780_data *ddata = platform_get_drvdata(pdev);
+ unsigned long val;
+ int error;
+
+ error = strict_strtoul(buf, 0, &val);
+ if (error)
+ return error;
+
+ if (val < BH1780_POFF || val > BH1780_PON)
+ return -EINVAL;
+
+ mutex_lock(&ddata->lock);
+
+ error = bh1780_write(ddata, BH1780_REG_CONTROL, val, "CONTROL");
+ if (error < 0) {
+ mutex_unlock(&ddata->lock);
+ return error;
+ }
+
+ msleep(BH1780_PON_DELAY);
+ ddata->power_state = val;
+ mutex_unlock(&ddata->lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(lux, S_IRUGO, bh1780_show_lux, NULL);
+
+static DEVICE_ATTR(power_state, S_IWUSR | S_IRUGO,
+ bh1780_show_power_state, bh1780_store_power_state);
+
+static struct attribute *bh1780_attributes[] = {
+ &dev_attr_power_state.attr,
+ &dev_attr_lux.attr,
+ NULL
+};
+
+static const struct attribute_group bh1780_attr_group = {
+ .attrs = bh1780_attributes,
+};
+
+static int __devinit bh1780_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct bh1780_data *ddata = NULL;
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) {
+ ret = -EIO;
+ goto err_op_failed;
+ }
+
+ ddata = kzalloc(sizeof(struct bh1780_data), GFP_KERNEL);
+ if (ddata == NULL) {
+ ret = -ENOMEM;
+ goto err_op_failed;
+ }
+
+ ddata->client = client;
+ i2c_set_clientdata(client, ddata);
+
+ ret = bh1780_read(ddata, BH1780_REG_PARTID, "PART ID");
+ if (ret < 0)
+ goto err_op_failed;
+
+ dev_info(&client->dev, "Ambient Light Sensor, Rev : %d\n",
+ (ret & BH1780_REVMASK));
+
+ mutex_init(&ddata->lock);
+
+ ret = sysfs_create_group(&client->dev.kobj, &bh1780_attr_group);
+ if (ret)
+ goto err_op_failed;
+
+ return 0;
+
+err_op_failed:
+ kfree(ddata);
+ return ret;
+}
+
+static int __devexit bh1780_remove(struct i2c_client *client)
+{
+ struct bh1780_data *ddata;
+
+ ddata = i2c_get_clientdata(client);
+ sysfs_remove_group(&client->dev.kobj, &bh1780_attr_group);
+ i2c_set_clientdata(client, NULL);
+ kfree(ddata);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int bh1780_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ struct bh1780_data *ddata;
+ int state, ret;
+
+ ddata = i2c_get_clientdata(client);
+ state = bh1780_read(ddata, BH1780_REG_CONTROL, "CONTROL");
+ if (state < 0)
+ return state;
+
+ ddata->power_state = state & BH1780_POWMASK;
+
+ ret = bh1780_write(ddata, BH1780_REG_CONTROL, BH1780_POFF,
+ "CONTROL");
+
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int bh1780_resume(struct i2c_client *client)
+{
+ struct bh1780_data *ddata;
+ int state, ret;
+
+ ddata = i2c_get_clientdata(client);
+ state = ddata->power_state;
+
+ ret = bh1780_write(ddata, BH1780_REG_CONTROL, state,
+ "CONTROL");
+
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+#else
+#define bh1780_suspend NULL
+#define bh1780_resume NULL
+#endif /* CONFIG_PM */
+
+static const struct i2c_device_id bh1780_id[] = {
+ { "bh1780", 0 },
+ { },
+};
+
+static struct i2c_driver bh1780_driver = {
+ .probe = bh1780_probe,
+ .remove = bh1780_remove,
+ .id_table = bh1780_id,
+ .suspend = bh1780_suspend,
+ .resume = bh1780_resume,
+ .driver = {
+ .name = "bh1780"
+ },
+};
+
+static int __init bh1780_init(void)
+{
+ return i2c_add_driver(&bh1780_driver);
+}
+
+static void __exit bh1780_exit(void)
+{
+ i2c_del_driver(&bh1780_driver);
+}
+
+module_init(bh1780_init)
+module_exit(bh1780_exit)
+
+MODULE_DESCRIPTION("BH1780GLI Ambient Light Sensor Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");
diff --git a/drivers/misc/bmp085.c b/drivers/misc/bmp085.c
new file mode 100644
index 00000000000..63ee4c1a531
--- /dev/null
+++ b/drivers/misc/bmp085.c
@@ -0,0 +1,482 @@
+/* Copyright (c) 2010 Christoph Mair <christoph.mair@gmail.com>
+
+ This driver supports the bmp085 digital barometric pressure
+ and temperature sensor from Bosch Sensortec. The datasheet
+ is avaliable from their website:
+ http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP085-DS000-05.pdf
+
+ A pressure measurement is issued by reading from pressure0_input.
+ The return value ranges from 30000 to 110000 pascal with a resulution
+ of 1 pascal (0.01 millibar) which enables measurements from 9000m above
+ to 500m below sea level.
+
+ The temperature can be read from temp0_input. Values range from
+ -400 to 850 representing the ambient temperature in degree celsius
+ multiplied by 10.The resolution is 0.1 celsius.
+
+ Because ambient pressure is temperature dependent, a temperature
+ measurement will be executed automatically even if the user is reading
+ from pressure0_input. This happens if the last temperature measurement
+ has been executed more then one second ago.
+
+ To decrease RMS noise from pressure measurements, the bmp085 can
+ autonomously calculate the average of up to eight samples. This is
+ set up by writing to the oversampling sysfs file. Accepted values
+ are 0, 1, 2 and 3. 2^x when x is the value written to this file
+ specifies the number of samples used to calculate the ambient pressure.
+ RMS noise is specified with six pascal (without averaging) and decreases
+ down to 3 pascal when using an oversampling setting of 3.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+
+
+#define BMP085_I2C_ADDRESS 0x77
+#define BMP085_CHIP_ID 0x55
+
+#define BMP085_CALIBRATION_DATA_START 0xAA
+#define BMP085_CALIBRATION_DATA_LENGTH 11 /* 16 bit values */
+#define BMP085_CHIP_ID_REG 0xD0
+#define BMP085_VERSION_REG 0xD1
+#define BMP085_CTRL_REG 0xF4
+#define BMP085_TEMP_MEASUREMENT 0x2E
+#define BMP085_PRESSURE_MEASUREMENT 0x34
+#define BMP085_CONVERSION_REGISTER_MSB 0xF6
+#define BMP085_CONVERSION_REGISTER_LSB 0xF7
+#define BMP085_CONVERSION_REGISTER_XLSB 0xF8
+#define BMP085_TEMP_CONVERSION_TIME 5
+
+#define BMP085_CLIENT_NAME "bmp085"
+
+
+static const unsigned short normal_i2c[] = { BMP085_I2C_ADDRESS,
+ I2C_CLIENT_END };
+
+struct bmp085_calibration_data {
+ s16 AC1, AC2, AC3;
+ u16 AC4, AC5, AC6;
+ s16 B1, B2;
+ s16 MB, MC, MD;
+};
+
+
+/* Each client has this additional data */
+struct bmp085_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ struct bmp085_calibration_data calibration;
+ u32 raw_temperature;
+ u32 raw_pressure;
+ unsigned char oversampling_setting;
+ u32 last_temp_measurement;
+ s32 b6; /* calculated temperature correction coefficient */
+};
+
+
+static s32 bmp085_read_calibration_data(struct i2c_client *client)
+{
+ u16 tmp[BMP085_CALIBRATION_DATA_LENGTH];
+ struct bmp085_data *data = i2c_get_clientdata(client);
+ struct bmp085_calibration_data *cali = &(data->calibration);
+ s32 status = i2c_smbus_read_i2c_block_data(client,
+ BMP085_CALIBRATION_DATA_START,
+ BMP085_CALIBRATION_DATA_LENGTH*sizeof(u16),
+ (u8 *)tmp);
+ if (status < 0)
+ return status;
+
+ if (status != BMP085_CALIBRATION_DATA_LENGTH*sizeof(u16))
+ return -EIO;
+
+ cali->AC1 = be16_to_cpu(tmp[0]);
+ cali->AC2 = be16_to_cpu(tmp[1]);
+ cali->AC3 = be16_to_cpu(tmp[2]);
+ cali->AC4 = be16_to_cpu(tmp[3]);
+ cali->AC5 = be16_to_cpu(tmp[4]);
+ cali->AC6 = be16_to_cpu(tmp[5]);
+ cali->B1 = be16_to_cpu(tmp[6]);
+ cali->B2 = be16_to_cpu(tmp[7]);
+ cali->MB = be16_to_cpu(tmp[8]);
+ cali->MC = be16_to_cpu(tmp[9]);
+ cali->MD = be16_to_cpu(tmp[10]);
+ return 0;
+}
+
+
+static s32 bmp085_update_raw_temperature(struct bmp085_data *data)
+{
+ u16 tmp;
+ s32 status;
+
+ mutex_lock(&data->lock);
+ status = i2c_smbus_write_byte_data(data->client, BMP085_CTRL_REG,
+ BMP085_TEMP_MEASUREMENT);
+ if (status != 0) {
+ dev_err(&data->client->dev,
+ "Error while requesting temperature measurement.\n");
+ goto exit;
+ }
+ msleep(BMP085_TEMP_CONVERSION_TIME);
+
+ status = i2c_smbus_read_i2c_block_data(data->client,
+ BMP085_CONVERSION_REGISTER_MSB, sizeof(tmp), (u8 *)&tmp);
+ if (status < 0)
+ goto exit;
+ if (status != sizeof(tmp)) {
+ dev_err(&data->client->dev,
+ "Error while reading temperature measurement result\n");
+ status = -EIO;
+ goto exit;
+ }
+ data->raw_temperature = be16_to_cpu(tmp);
+ data->last_temp_measurement = jiffies;
+ status = 0; /* everything ok, return 0 */
+
+exit:
+ mutex_unlock(&data->lock);
+ return status;
+}
+
+static s32 bmp085_update_raw_pressure(struct bmp085_data *data)
+{
+ u32 tmp = 0;
+ s32 status;
+
+ mutex_lock(&data->lock);
+ status = i2c_smbus_write_byte_data(data->client, BMP085_CTRL_REG,
+ BMP085_PRESSURE_MEASUREMENT + (data->oversampling_setting<<6));
+ if (status != 0) {
+ dev_err(&data->client->dev,
+ "Error while requesting pressure measurement.\n");
+ goto exit;
+ }
+
+ /* wait for the end of conversion */
+ msleep(2+(3 << data->oversampling_setting));
+
+ /* copy data into a u32 (4 bytes), but skip the first byte. */
+ status = i2c_smbus_read_i2c_block_data(data->client,
+ BMP085_CONVERSION_REGISTER_MSB, 3, ((u8 *)&tmp)+1);
+ if (status < 0)
+ goto exit;
+ if (status != 3) {
+ dev_err(&data->client->dev,
+ "Error while reading pressure measurement results\n");
+ status = -EIO;
+ goto exit;
+ }
+ data->raw_pressure = be32_to_cpu((tmp));
+ data->raw_pressure >>= (8-data->oversampling_setting);
+ status = 0; /* everything ok, return 0 */
+
+exit:
+ mutex_unlock(&data->lock);
+ return status;
+}
+
+
+/*
+ * This function starts the temperature measurement and returns the value
+ * in tenth of a degree celsius.
+ */
+static s32 bmp085_get_temperature(struct bmp085_data *data, int *temperature)
+{
+ struct bmp085_calibration_data *cali = &data->calibration;
+ long x1, x2;
+ int status;
+
+ status = bmp085_update_raw_temperature(data);
+ if (status != 0)
+ goto exit;
+
+ x1 = ((data->raw_temperature - cali->AC6) * cali->AC5) >> 15;
+ x2 = (cali->MC << 11) / (x1 + cali->MD);
+ data->b6 = x1 + x2 - 4000;
+ /* if NULL just update b6. Used for pressure only measurements */
+ if (temperature != NULL)
+ *temperature = (x1+x2+8) >> 4;
+
+exit:
+ return status;;
+}
+
+/*
+ * This function starts the pressure measurement and returns the value
+ * in millibar. Since the pressure depends on the ambient temperature,
+ * a temperature measurement is executed if the last known value is older
+ * than one second.
+ */
+static s32 bmp085_get_pressure(struct bmp085_data *data, int *pressure)
+{
+ struct bmp085_calibration_data *cali = &data->calibration;
+ s32 x1, x2, x3, b3;
+ u32 b4, b7;
+ s32 p;
+ int status;
+
+ /* alt least every second force an update of the ambient temperature */
+ if (data->last_temp_measurement + 1*HZ < jiffies) {
+ status = bmp085_get_temperature(data, NULL);
+ if (status != 0)
+ goto exit;
+ }
+
+ status = bmp085_update_raw_pressure(data);
+ if (status != 0)
+ goto exit;
+
+ x1 = (data->b6 * data->b6) >> 12;
+ x1 *= cali->B2;
+ x1 >>= 11;
+
+ x2 = cali->AC2 * data->b6;
+ x2 >>= 11;
+
+ x3 = x1 + x2;
+
+ b3 = (((((s32)cali->AC1) * 4 + x3) << data->oversampling_setting) + 2);
+ b3 >>= 2;
+
+ x1 = (cali->AC3 * data->b6) >> 13;
+ x2 = (cali->B1 * ((data->b6 * data->b6) >> 12)) >> 16;
+ x3 = (x1 + x2 + 2) >> 2;
+ b4 = (cali->AC4 * (u32)(x3 + 32768)) >> 15;
+
+ b7 = ((u32)data->raw_pressure - b3) *
+ (50000 >> data->oversampling_setting);
+ p = ((b7 < 0x80000000) ? ((b7 << 1) / b4) : ((b7 / b4) * 2));
+
+ x1 = p >> 8;
+ x1 *= x1;
+ x1 = (x1 * 3038) >> 16;
+ x2 = (-7357 * p) >> 16;
+ p += (x1 + x2 + 3791) >> 4;
+
+ *pressure = p;
+
+exit:
+ return status;
+}
+
+/*
+ * This function sets the chip-internal oversampling. Valid values are 0..3.
+ * The chip will use 2^oversampling samples for internal averaging.
+ * This influences the measurement time and the accuracy; larger values
+ * increase both. The datasheet gives on overview on how measurement time,
+ * accuracy and noise correlate.
+ */
+static void bmp085_set_oversampling(struct bmp085_data *data,
+ unsigned char oversampling)
+{
+ if (oversampling > 3)
+ oversampling = 3;
+ data->oversampling_setting = oversampling;
+}
+
+/*
+ * Returns the currently selected oversampling. Range: 0..3
+ */
+static unsigned char bmp085_get_oversampling(struct bmp085_data *data)
+{
+ return data->oversampling_setting;
+}
+
+/* sysfs callbacks */
+static ssize_t set_oversampling(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct bmp085_data *data = i2c_get_clientdata(client);
+ unsigned long oversampling;
+ int success = strict_strtoul(buf, 10, &oversampling);
+ if (success == 0) {
+ bmp085_set_oversampling(data, oversampling);
+ return count;
+ }
+ return success;
+}
+
+static ssize_t show_oversampling(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct bmp085_data *data = i2c_get_clientdata(client);
+ return sprintf(buf, "%u\n", bmp085_get_oversampling(data));
+}
+static DEVICE_ATTR(oversampling, S_IWUSR | S_IRUGO,
+ show_oversampling, set_oversampling);
+
+
+static ssize_t show_temperature(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int temperature;
+ int status;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct bmp085_data *data = i2c_get_clientdata(client);
+
+ status = bmp085_get_temperature(data, &temperature);
+ if (status != 0)
+ return status;
+ else
+ return sprintf(buf, "%d\n", temperature);
+}
+static DEVICE_ATTR(temp0_input, S_IRUGO, show_temperature, NULL);
+
+
+static ssize_t show_pressure(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int pressure;
+ int status;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct bmp085_data *data = i2c_get_clientdata(client);
+
+ status = bmp085_get_pressure(data, &pressure);
+ if (status != 0)
+ return status;
+ else
+ return sprintf(buf, "%d\n", pressure);
+}
+static DEVICE_ATTR(pressure0_input, S_IRUGO, show_pressure, NULL);
+
+
+static struct attribute *bmp085_attributes[] = {
+ &dev_attr_temp0_input.attr,
+ &dev_attr_pressure0_input.attr,
+ &dev_attr_oversampling.attr,
+ NULL
+};
+
+static const struct attribute_group bmp085_attr_group = {
+ .attrs = bmp085_attributes,
+};
+
+static int bmp085_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ if (client->addr != BMP085_I2C_ADDRESS)
+ return -ENODEV;
+
+ if (i2c_smbus_read_byte_data(client, BMP085_CHIP_ID_REG) != BMP085_CHIP_ID)
+ return -ENODEV;
+
+ return 0;
+}
+
+static int bmp085_init_client(struct i2c_client *client)
+{
+ unsigned char version;
+ int status;
+ struct bmp085_data *data = i2c_get_clientdata(client);
+ data->client = client;
+ status = bmp085_read_calibration_data(client);
+ if (status != 0)
+ goto exit;
+ version = i2c_smbus_read_byte_data(client, BMP085_VERSION_REG);
+ data->last_temp_measurement = 0;
+ data->oversampling_setting = 3;
+ mutex_init(&data->lock);
+ dev_info(&data->client->dev, "BMP085 ver. %d.%d found.\n",
+ (version & 0x0F), (version & 0xF0) >> 4);
+exit:
+ return status;
+}
+
+static int bmp085_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct bmp085_data *data;
+ int err = 0;
+
+ data = kzalloc(sizeof(struct bmp085_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ /* default settings after POR */
+ data->oversampling_setting = 0x00;
+
+ i2c_set_clientdata(client, data);
+
+ /* Initialize the BMP085 chip */
+ err = bmp085_init_client(client);
+ if (err != 0)
+ goto exit_free;
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&client->dev.kobj, &bmp085_attr_group);
+ if (err)
+ goto exit_free;
+
+ dev_info(&data->client->dev, "Succesfully initialized bmp085!\n");
+ goto exit;
+
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int bmp085_remove(struct i2c_client *client)
+{
+ sysfs_remove_group(&client->dev.kobj, &bmp085_attr_group);
+ kfree(i2c_get_clientdata(client));
+ return 0;
+}
+
+static const struct i2c_device_id bmp085_id[] = {
+ { "bmp085", 0 },
+ { }
+};
+
+static struct i2c_driver bmp085_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "bmp085"
+ },
+ .id_table = bmp085_id,
+ .probe = bmp085_probe,
+ .remove = bmp085_remove,
+
+ .detect = bmp085_detect,
+ .address_list = normal_i2c
+};
+
+static int __init bmp085_init(void)
+{
+ return i2c_add_driver(&bmp085_driver);
+}
+
+static void __exit bmp085_exit(void)
+{
+ i2c_del_driver(&bmp085_driver);
+}
+
+
+MODULE_AUTHOR("Christoph Mair <christoph.mair@gmail.com");
+MODULE_DESCRIPTION("BMP085 driver");
+MODULE_LICENSE("GPL");
+
+module_init(bmp085_init);
+module_exit(bmp085_exit);
diff --git a/drivers/misc/hmc6352.c b/drivers/misc/hmc6352.c
new file mode 100644
index 00000000000..234bfcaf209
--- /dev/null
+++ b/drivers/misc/hmc6352.c
@@ -0,0 +1,166 @@
+/*
+ * hmc6352.c - Honeywell Compass Driver
+ *
+ * Copyright (C) 2009 Intel Corp
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/sysfs.h>
+
+static DEFINE_MUTEX(compass_mutex);
+
+static int compass_command(struct i2c_client *c, u8 cmd)
+{
+ int ret = i2c_master_send(c, &cmd, 1);
+ if (ret < 0)
+ dev_warn(&c->dev, "command '%c' failed.\n", cmd);
+ return ret;
+}
+
+static int compass_store(struct device *dev, const char *buf, size_t count,
+ const char *map)
+{
+ struct i2c_client *c = to_i2c_client(dev);
+ int ret;
+ unsigned long val;
+
+ if (strict_strtoul(buf, 10, &val))
+ return -EINVAL;
+ if (val >= strlen(map))
+ return -EINVAL;
+ mutex_lock(&compass_mutex);
+ ret = compass_command(c, map[val]);
+ mutex_unlock(&compass_mutex);
+ if (ret < 0)
+ return ret;
+ return count;
+}
+
+static ssize_t compass_calibration_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return compass_store(dev, buf, count, "EC");
+}
+
+static ssize_t compass_power_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return compass_store(dev, buf, count, "SW");
+}
+
+static ssize_t compass_heading_data_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ unsigned char i2c_data[2];
+ unsigned int ret;
+
+ mutex_lock(&compass_mutex);
+ ret = compass_command(client, 'A');
+ if (ret != 1) {
+ mutex_unlock(&compass_mutex);
+ return ret;
+ }
+ msleep(10); /* sending 'A' cmd we need to wait for 7-10 millisecs */
+ ret = i2c_master_recv(client, i2c_data, 2);
+ mutex_unlock(&compass_mutex);
+ if (ret != 1) {
+ dev_warn(dev, "i2c read data cmd failed\n");
+ return ret;
+ }
+ ret = (i2c_data[0] << 8) | i2c_data[1];
+ return sprintf(buf, "%d.%d\n", ret/10, ret%10);
+}
+
+
+static DEVICE_ATTR(heading0_input, S_IRUGO, compass_heading_data_show, NULL);
+static DEVICE_ATTR(calibration, S_IWUSR, NULL, compass_calibration_store);
+static DEVICE_ATTR(power_state, S_IWUSR, NULL, compass_power_mode_store);
+
+static struct attribute *mid_att_compass[] = {
+ &dev_attr_heading0_input.attr,
+ &dev_attr_calibration.attr,
+ &dev_attr_power_state.attr,
+ NULL
+};
+
+static const struct attribute_group m_compass_gr = {
+ .name = "hmc6352",
+ .attrs = mid_att_compass
+};
+
+static int hmc6352_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int res;
+
+ res = sysfs_create_group(&client->dev.kobj, &m_compass_gr);
+ if (res) {
+ dev_err(&client->dev, "device_create_file failed\n");
+ return res;
+ }
+ dev_info(&client->dev, "%s HMC6352 compass chip found\n",
+ client->name);
+ return 0;
+}
+
+static int hmc6352_remove(struct i2c_client *client)
+{
+ sysfs_remove_group(&client->dev.kobj, &m_compass_gr);
+ return 0;
+}
+
+static struct i2c_device_id hmc6352_id[] = {
+ { "hmc6352", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, hmc6352_id);
+
+static struct i2c_driver hmc6352_driver = {
+ .driver = {
+ .name = "hmc6352",
+ },
+ .probe = hmc6352_probe,
+ .remove = hmc6352_remove,
+ .id_table = hmc6352_id,
+};
+
+static int __init sensor_hmc6352_init(void)
+{
+ return i2c_add_driver(&hmc6352_driver);
+}
+
+static void __exit sensor_hmc6352_exit(void)
+{
+ i2c_del_driver(&hmc6352_driver);
+}
+
+module_init(sensor_hmc6352_init);
+module_exit(sensor_hmc6352_exit);
+
+MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
+MODULE_DESCRIPTION("hmc6352 Compass Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/hpilo.c b/drivers/misc/hpilo.c
index 98ad0120aa9..557a8c2a733 100644
--- a/drivers/misc/hpilo.c
+++ b/drivers/misc/hpilo.c
@@ -256,7 +256,8 @@ static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
{
- char *dma_va, *dma_pa;
+ char *dma_va;
+ dma_addr_t dma_pa;
struct ccb *driver_ccb, *ilo_ccb;
driver_ccb = &data->driver_ccb;
@@ -272,12 +273,12 @@ static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
return -ENOMEM;
dma_va = (char *)data->dma_va;
- dma_pa = (char *)data->dma_pa;
+ dma_pa = data->dma_pa;
memset(dma_va, 0, data->dma_size);
dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN);
- dma_pa = (char *)roundup((unsigned long)dma_pa, ILO_START_ALIGN);
+ dma_pa = roundup(dma_pa, ILO_START_ALIGN);
/*
* Create two ccb's, one with virt addrs, one with phys addrs.
@@ -288,26 +289,26 @@ static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
fifo_setup(dma_va, NR_QENTRY);
driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE;
- ilo_ccb->ccb_u1.send_fifobar = dma_pa + FIFOHANDLESIZE;
+ ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE;
dma_va += fifo_sz(NR_QENTRY);
dma_pa += fifo_sz(NR_QENTRY);
dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ);
- dma_pa = (char *)roundup((unsigned long)dma_pa, ILO_CACHE_SZ);
+ dma_pa = roundup(dma_pa, ILO_CACHE_SZ);
fifo_setup(dma_va, NR_QENTRY);
driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE;
- ilo_ccb->ccb_u3.recv_fifobar = dma_pa + FIFOHANDLESIZE;
+ ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE;
dma_va += fifo_sz(NR_QENTRY);
dma_pa += fifo_sz(NR_QENTRY);
driver_ccb->ccb_u2.send_desc = dma_va;
- ilo_ccb->ccb_u2.send_desc = dma_pa;
+ ilo_ccb->ccb_u2.send_desc_pa = dma_pa;
dma_pa += desc_mem_sz(NR_QENTRY);
dma_va += desc_mem_sz(NR_QENTRY);
driver_ccb->ccb_u4.recv_desc = dma_va;
- ilo_ccb->ccb_u4.recv_desc = dma_pa;
+ ilo_ccb->ccb_u4.recv_desc_pa = dma_pa;
driver_ccb->channel = slot;
ilo_ccb->channel = slot;
diff --git a/drivers/misc/hpilo.h b/drivers/misc/hpilo.h
index 247eb386a97..54e43adbdea 100644
--- a/drivers/misc/hpilo.h
+++ b/drivers/misc/hpilo.h
@@ -79,21 +79,21 @@ struct ilo_hwinfo {
struct ccb {
union {
char *send_fifobar;
- u64 padding1;
+ u64 send_fifobar_pa;
} ccb_u1;
union {
char *send_desc;
- u64 padding2;
+ u64 send_desc_pa;
} ccb_u2;
u64 send_ctrl;
union {
char *recv_fifobar;
- u64 padding3;
+ u64 recv_fifobar_pa;
} ccb_u3;
union {
char *recv_desc;
- u64 padding4;
+ u64 recv_desc_pa;
} ccb_u4;
u64 recv_ctrl;
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 6a5af18faf6..b0de5794718 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -3030,6 +3030,34 @@ static void __init iommu_exit_mempool(void)
}
+static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev)
+{
+ struct dmar_drhd_unit *drhd;
+ u32 vtbar;
+ int rc;
+
+ /* We know that this device on this chipset has its own IOMMU.
+ * If we find it under a different IOMMU, then the BIOS is lying
+ * to us. Hope that the IOMMU for this device is actually
+ * disabled, and it needs no translation...
+ */
+ rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar);
+ if (rc) {
+ /* "can't" happen */
+ dev_info(&pdev->dev, "failed to run vt-d quirk\n");
+ return;
+ }
+ vtbar &= 0xffff0000;
+
+ /* we know that the this iommu should be at offset 0xa000 from vtbar */
+ drhd = dmar_find_matched_drhd_unit(pdev);
+ if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000,
+ TAINT_FIRMWARE_WORKAROUND,
+ "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n"))
+ pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO;
+}
+DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu);
+
static void __init init_no_remapping_devices(void)
{
struct dmar_drhd_unit *drhd;
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index dd88803e489..7158f9528ec 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -701,7 +701,7 @@ int __init dasd_eer_init(void)
void dasd_eer_exit(void)
{
if (dasd_eer_dev) {
- WARN_ON(misc_deregister(dasd_eer_dev) != 0);
+ misc_deregister(dasd_eer_dev);
kfree(dasd_eer_dev);
dasd_eer_dev = NULL;
}
diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index 2ed3f82e5c3..e021ec663ef 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -627,7 +627,7 @@ out_iucv:
static void __exit mon_exit(void)
{
segment_unload(mon_dcss_name);
- WARN_ON(misc_deregister(&mon_dev) != 0);
+ misc_deregister(&mon_dev);
device_unregister(monreader_device);
driver_unregister(&monreader_driver);
iucv_unregister(&monreader_iucv_handler, 1);
diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 98a49dfda1d..572a1e7fd09 100644
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -380,7 +380,7 @@ out_driver:
static void __exit mon_exit(void)
{
- WARN_ON(misc_deregister(&mon_dev) != 0);
+ misc_deregister(&mon_dev);
platform_device_unregister(monwriter_pdev);
platform_driver_unregister(&monwriter_pdrv);
}
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index 31f172397af..30626440a06 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -3724,6 +3724,17 @@ rs_ioctl(struct tty_struct *tty, struct file * file,
return e100_enable_rs485(tty, &rs485data);
}
+ case TIOCGRS485:
+ {
+ struct serial_rs485 *rs485data =
+ &(((struct e100_serial *)tty->driver_data)->rs485);
+ /* This is the ioctl to get RS485 data from user-space */
+ if (copy_to_user((struct serial_rs485 *) arg,
+ rs485data,
+ sizeof(serial_rs485)))
+ return -EFAULT;
+ break;
+ }
case TIOCSERWRRS485:
{
diff --git a/drivers/video/w100fb.c b/drivers/video/w100fb.c
index e66b8b19ce5..d8b12c32e3e 100644
--- a/drivers/video/w100fb.c
+++ b/drivers/video/w100fb.c
@@ -858,9 +858,9 @@ unsigned long w100fb_gpio_read(int port)
void w100fb_gpio_write(int port, unsigned long value)
{
if (port==W100_GPIO_PORT_A)
- value = writel(value, remapped_regs + mmGPIO_DATA);
+ writel(value, remapped_regs + mmGPIO_DATA);
else
- value = writel(value, remapped_regs + mmGPIO_DATA2);
+ writel(value, remapped_regs + mmGPIO_DATA2);
}
EXPORT_SYMBOL(w100fb_gpio_read);
EXPORT_SYMBOL(w100fb_gpio_write);