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-rw-r--r--drivers/dma/shdma.c79
-rw-r--r--drivers/dma/shdma.h4
2 files changed, 52 insertions, 31 deletions
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index ab12fa5a129..b419afaa238 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -24,8 +24,7 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
-#include <cpu/dma.h>
-#include <asm/dma-sh.h>
+#include <asm/dmaengine.h>
#include "shdma.h"
/* DMA descriptor control */
@@ -38,15 +37,8 @@ enum sh_dmae_desc_status {
};
#define NR_DESCS_PER_CHANNEL 32
-/*
- * Define the default configuration for dual address memory-memory transfer.
- * The 0x400 value represents auto-request, external->external.
- *
- * And this driver set 4byte burst mode.
- * If you want to change mode, you need to change RS_DEFAULT of value.
- * (ex 1byte burst mode -> (RS_DUAL & ~TS_32)
- */
-#define RS_DEFAULT (RS_DUAL)
+/* Default MEMCPY transfer size = 2^2 = 4 bytes */
+#define LOG2_DEFAULT_XFER_SIZE 2
/* A bitmask with bits enough for enum sh_dmae_slave_chan_id */
static unsigned long sh_dmae_slave_used[BITS_TO_LONGS(SHDMA_SLAVE_NUMBER)];
@@ -90,7 +82,7 @@ static int sh_dmae_rst(struct sh_dmae_device *shdev)
unsigned short dmaor;
sh_dmae_ctl_stop(shdev);
- dmaor = dmaor_read(shdev) | DMAOR_INIT;
+ dmaor = dmaor_read(shdev) | shdev->pdata->dmaor_init;
dmaor_write(shdev, dmaor);
if (dmaor_read(shdev) & (DMAOR_AE | DMAOR_NMIF)) {
@@ -110,13 +102,36 @@ static bool dmae_is_busy(struct sh_dmae_chan *sh_chan)
return false; /* waiting */
}
-static unsigned int ts_shift[] = TS_SHIFT;
-static inline unsigned int calc_xmit_shift(u32 chcr)
+static unsigned int calc_xmit_shift(struct sh_dmae_chan *sh_chan, u32 chcr)
{
- int cnt = ((chcr & CHCR_TS_LOW_MASK) >> CHCR_TS_LOW_SHIFT) |
- ((chcr & CHCR_TS_HIGH_MASK) >> CHCR_TS_HIGH_SHIFT);
+ struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
+ struct sh_dmae_device, common);
+ struct sh_dmae_pdata *pdata = shdev->pdata;
+ int cnt = ((chcr & pdata->ts_low_mask) >> pdata->ts_low_shift) |
+ ((chcr & pdata->ts_high_mask) >> pdata->ts_high_shift);
+
+ if (cnt >= pdata->ts_shift_num)
+ cnt = 0;
- return ts_shift[cnt];
+ return pdata->ts_shift[cnt];
+}
+
+static u32 log2size_to_chcr(struct sh_dmae_chan *sh_chan, int l2size)
+{
+ struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
+ struct sh_dmae_device, common);
+ struct sh_dmae_pdata *pdata = shdev->pdata;
+ int i;
+
+ for (i = 0; i < pdata->ts_shift_num; i++)
+ if (pdata->ts_shift[i] == l2size)
+ break;
+
+ if (i == pdata->ts_shift_num)
+ i = 0;
+
+ return ((i << pdata->ts_low_shift) & pdata->ts_low_mask) |
+ ((i << pdata->ts_high_shift) & pdata->ts_high_mask);
}
static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs *hw)
@@ -144,8 +159,13 @@ static void dmae_halt(struct sh_dmae_chan *sh_chan)
static void dmae_init(struct sh_dmae_chan *sh_chan)
{
- u32 chcr = RS_DEFAULT; /* default is DUAL mode */
- sh_chan->xmit_shift = calc_xmit_shift(chcr);
+ /*
+ * Default configuration for dual address memory-memory transfer.
+ * 0x400 represents auto-request.
+ */
+ u32 chcr = DM_INC | SM_INC | 0x400 | log2size_to_chcr(sh_chan,
+ LOG2_DEFAULT_XFER_SIZE);
+ sh_chan->xmit_shift = calc_xmit_shift(sh_chan, chcr);
sh_dmae_writel(sh_chan, chcr, CHCR);
}
@@ -155,7 +175,7 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
if (dmae_is_busy(sh_chan))
return -EBUSY;
- sh_chan->xmit_shift = calc_xmit_shift(val);
+ sh_chan->xmit_shift = calc_xmit_shift(sh_chan, val);
sh_dmae_writel(sh_chan, val, CHCR);
return 0;
@@ -285,9 +305,8 @@ static int sh_dmae_alloc_chan_resources(struct dma_chan *chan)
dmae_set_dmars(sh_chan, cfg->mid_rid);
dmae_set_chcr(sh_chan, cfg->chcr);
- } else {
- if ((sh_dmae_readl(sh_chan, CHCR) & 0x700) != 0x400)
- dmae_set_chcr(sh_chan, RS_DEFAULT);
+ } else if ((sh_dmae_readl(sh_chan, CHCR) & 0xf00) != 0x400) {
+ dmae_init(sh_chan);
}
spin_lock_bh(&sh_chan->desc_lock);
@@ -757,7 +776,7 @@ static irqreturn_t sh_dmae_err(int irq, void *data)
sh_dmae_ctl_stop(shdev);
/* We cannot detect, which channel caused the error, have to reset all */
- for (i = 0; i < MAX_DMA_CHANNELS; i++) {
+ for (i = 0; i < SH_DMAC_MAX_CHANNELS; i++) {
struct sh_dmae_chan *sh_chan = shdev->chan[i];
if (sh_chan) {
struct sh_desc *desc;
@@ -822,6 +841,9 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
return -ENOMEM;
}
+ /* copy struct dma_device */
+ new_sh_chan->common.device = &shdev->common;
+
new_sh_chan->dev = shdev->common.dev;
new_sh_chan->id = id;
new_sh_chan->irq = irq;
@@ -840,9 +862,6 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
INIT_LIST_HEAD(&new_sh_chan->ld_queue);
INIT_LIST_HEAD(&new_sh_chan->ld_free);
- /* copy struct dma_device */
- new_sh_chan->common.device = &shdev->common;
-
/* Add the channel to DMA device channel list */
list_add_tail(&new_sh_chan->common.device_node,
&shdev->common.channels);
@@ -896,8 +915,8 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
{
struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
unsigned long irqflags = IRQF_DISABLED,
- chan_flag[MAX_DMA_CHANNELS] = {};
- int errirq, chan_irq[MAX_DMA_CHANNELS];
+ chan_flag[SH_DMAC_MAX_CHANNELS] = {};
+ int errirq, chan_irq[SH_DMAC_MAX_CHANNELS];
int err, i, irq_cnt = 0, irqres = 0;
struct sh_dmae_device *shdev;
struct resource *chan, *dmars, *errirq_res, *chanirq_res;
@@ -983,7 +1002,7 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
shdev->common.dev = &pdev->dev;
/* Default transfer size of 32 bytes requires 32-byte alignment */
- shdev->common.copy_align = 5;
+ shdev->common.copy_align = LOG2_DEFAULT_XFER_SIZE;
#if defined(CONFIG_CPU_SH4)
chanirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 800fd884be8..9f0897f7fe3 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -17,6 +17,8 @@
#include <linux/interrupt.h>
#include <linux/list.h>
+#include <asm/dmaengine.h>
+
#define SH_DMA_TCR_MAX 0x00FFFFFF /* 16MB */
struct sh_dmae_regs {
@@ -55,7 +57,7 @@ struct sh_dmae_chan {
struct sh_dmae_device {
struct dma_device common;
- struct sh_dmae_chan *chan[MAX_DMA_CHANNELS];
+ struct sh_dmae_chan *chan[SH_DMAC_MAX_CHANNELS];
struct sh_dmae_pdata *pdata;
u32 __iomem *chan_reg;
u16 __iomem *dmars;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 14:32:21 +0000