summaryrefslogtreecommitdiffstats
path: root/drivers/mfd
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig8
-rw-r--r--drivers/mfd/Makefile3
-rw-r--r--drivers/mfd/davinci_voicecodec.c190
-rw-r--r--drivers/mfd/twl-core.c4
-rw-r--r--drivers/mfd/wm831x-core.c3
-rw-r--r--drivers/mfd/wm831x-irq.c30
-rw-r--r--drivers/mfd/wm8350-core.c4
-rw-r--r--drivers/mfd/wm8994-core.c43
-rw-r--r--drivers/mfd/wm8994-irq.c310
9 files changed, 587 insertions, 8 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2a5a0b78f84..de3e74cde51 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -53,6 +53,10 @@ config MFD_SH_MOBILE_SDHI
This driver supports the SDHI hardware block found in many
SuperH Mobile SoCs.
+config MFD_DAVINCI_VOICECODEC
+ tristate
+ select MFD_CORE
+
config MFD_DM355EVM_MSP
bool "DaVinci DM355 EVM microcontroller"
depends on I2C && MACH_DAVINCI_DM355_EVM
@@ -297,9 +301,9 @@ config MFD_WM8350_I2C
selected to enable support for the functionality of the chip.
config MFD_WM8994
- tristate "Support Wolfson Microelectronics WM8994"
+ bool "Support Wolfson Microelectronics WM8994"
select MFD_CORE
- depends on I2C
+ depends on I2C=y && GENERIC_HARDIRQS
help
The WM8994 is a highly integrated hi-fi CODEC designed for
smartphone applicatiosn. As well as audio functionality it
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 22715add99a..87935f967aa 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o
+obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o tmio_core.o
@@ -25,7 +26,7 @@ wm8350-objs := wm8350-core.o wm8350-regmap.o wm8350-gpio.o
wm8350-objs += wm8350-irq.o
obj-$(CONFIG_MFD_WM8350) += wm8350.o
obj-$(CONFIG_MFD_WM8350_I2C) += wm8350-i2c.o
-obj-$(CONFIG_MFD_WM8994) += wm8994-core.o
+obj-$(CONFIG_MFD_WM8994) += wm8994-core.o wm8994-irq.o
obj-$(CONFIG_TPS65010) += tps65010.o
obj-$(CONFIG_MENELAUS) += menelaus.o
diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
new file mode 100644
index 00000000000..3e75f02e477
--- /dev/null
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -0,0 +1,190 @@
+/*
+ * DaVinci Voice Codec Core Interface for TI platforms
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.aguilar@ridgerun.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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <sound/pcm.h>
+
+#include <linux/mfd/davinci_voicecodec.h>
+
+u32 davinci_vc_read(struct davinci_vc *davinci_vc, int reg)
+{
+ return __raw_readl(davinci_vc->base + reg);
+}
+
+void davinci_vc_write(struct davinci_vc *davinci_vc,
+ int reg, u32 val)
+{
+ __raw_writel(val, davinci_vc->base + reg);
+}
+
+static int __init davinci_vc_probe(struct platform_device *pdev)
+{
+ struct davinci_vc *davinci_vc;
+ struct resource *res, *mem;
+ struct mfd_cell *cell = NULL;
+ int ret;
+
+ davinci_vc = kzalloc(sizeof(struct davinci_vc), GFP_KERNEL);
+ if (!davinci_vc) {
+ dev_dbg(&pdev->dev,
+ "could not allocate memory for private data\n");
+ return -ENOMEM;
+ }
+
+ davinci_vc->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(davinci_vc->clk)) {
+ dev_dbg(&pdev->dev,
+ "could not get the clock for voice codec\n");
+ ret = -ENODEV;
+ goto fail1;
+ }
+ clk_enable(davinci_vc->clk);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no mem resource\n");
+ ret = -ENODEV;
+ goto fail2;
+ }
+
+ davinci_vc->pbase = res->start;
+ davinci_vc->base_size = resource_size(res);
+
+ mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size,
+ pdev->name);
+ if (!mem) {
+ dev_err(&pdev->dev, "VCIF region already claimed\n");
+ ret = -EBUSY;
+ goto fail2;
+ }
+
+ davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size);
+ if (!davinci_vc->base) {
+ dev_err(&pdev->dev, "can't ioremap mem resource.\n");
+ ret = -ENOMEM;
+ goto fail3;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no DMA resource\n");
+ return -ENXIO;
+ }
+
+ davinci_vc->davinci_vcif.dma_tx_channel = res->start;
+ davinci_vc->davinci_vcif.dma_tx_addr =
+ (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_WFIFO);
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (!res) {
+ dev_err(&pdev->dev, "no DMA resource\n");
+ return -ENXIO;
+ }
+
+ davinci_vc->davinci_vcif.dma_rx_channel = res->start;
+ davinci_vc->davinci_vcif.dma_rx_addr =
+ (dma_addr_t)(io_v2p(davinci_vc->base) + DAVINCI_VC_RFIFO);
+
+ davinci_vc->dev = &pdev->dev;
+ davinci_vc->pdev = pdev;
+
+ /* Voice codec interface client */
+ cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];
+ cell->name = "davinci_vcif";
+ cell->driver_data = davinci_vc;
+
+ /* Voice codec CQ93VC client */
+ cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];
+ cell->name = "cq93vc";
+ cell->driver_data = davinci_vc;
+
+ ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,
+ DAVINCI_VC_CELLS, NULL, 0);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "fail to register client devices\n");
+ goto fail4;
+ }
+
+ return 0;
+
+fail4:
+ iounmap(davinci_vc->base);
+fail3:
+ release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
+fail2:
+ clk_disable(davinci_vc->clk);
+ clk_put(davinci_vc->clk);
+ davinci_vc->clk = NULL;
+fail1:
+ kfree(davinci_vc);
+
+ return ret;
+}
+
+static int __devexit davinci_vc_remove(struct platform_device *pdev)
+{
+ struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
+
+ mfd_remove_devices(&pdev->dev);
+
+ iounmap(davinci_vc->base);
+ release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
+
+ clk_disable(davinci_vc->clk);
+ clk_put(davinci_vc->clk);
+ davinci_vc->clk = NULL;
+
+ kfree(davinci_vc);
+
+ return 0;
+}
+
+static struct platform_driver davinci_vc_driver = {
+ .driver = {
+ .name = "davinci_voicecodec",
+ .owner = THIS_MODULE,
+ },
+ .remove = __devexit_p(davinci_vc_remove),
+};
+
+static int __init davinci_vc_init(void)
+{
+ return platform_driver_probe(&davinci_vc_driver, davinci_vc_probe);
+}
+module_init(davinci_vc_init);
+
+static void __exit davinci_vc_exit(void)
+{
+ platform_driver_unregister(&davinci_vc_driver);
+}
+module_exit(davinci_vc_exit);
+
+MODULE_AUTHOR("Miguel Aguilar");
+MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 562cd4935e1..720e099e506 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -109,7 +109,7 @@
#endif
#if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) ||\
- defined(CONFIG_SND_SOC_TWL6030) || defined(CONFIG_SND_SOC_TWL6030_MODULE)
+ defined(CONFIG_SND_SOC_TWL6040) || defined(CONFIG_SND_SOC_TWL6040_MODULE)
#define twl_has_codec() true
#else
#define twl_has_codec() false
@@ -708,7 +708,7 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
/* Phoenix*/
if (twl_has_codec() && pdata->codec && twl_class_is_6030()) {
sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
- child = add_child(sub_chip_id, "twl6030_codec",
+ child = add_child(sub_chip_id, "twl6040_codec",
pdata->codec, sizeof(*pdata->codec),
false, 0, 0);
if (IS_ERR(child))
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index a3d5728b644..f2ab025ad97 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -349,6 +349,9 @@ int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
goto disable;
}
+ /* If an interrupt arrived late clean up after it */
+ try_wait_for_completion(&wm831x->auxadc_done);
+
/* Ignore the result to allow us to soldier on without IRQ hookup */
wait_for_completion_timeout(&wm831x->auxadc_done, msecs_to_jiffies(5));
diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c
index 30132769711..4c1122ceb44 100644
--- a/drivers/mfd/wm831x-irq.c
+++ b/drivers/mfd/wm831x-irq.c
@@ -21,6 +21,7 @@
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>
+#include <linux/mfd/wm831x/gpio.h>
#include <linux/mfd/wm831x/irq.h>
#include <linux/delay.h>
@@ -388,12 +389,41 @@ static void wm831x_irq_mask(unsigned int irq)
wm831x->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
}
+static int wm831x_irq_set_type(unsigned int irq, unsigned int type)
+{
+ struct wm831x *wm831x = get_irq_chip_data(irq);
+ int val;
+
+ irq = irq - wm831x->irq_base;
+
+ if (irq < WM831X_IRQ_GPIO_1 || irq > WM831X_IRQ_GPIO_11)
+ return -EINVAL;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_BOTH:
+ val = WM831X_GPN_INT_MODE;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ val = WM831X_GPN_POL;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ val = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + irq,
+ WM831X_GPN_INT_MODE | WM831X_GPN_POL, val);
+}
+
static struct irq_chip wm831x_irq_chip = {
.name = "wm831x",
.bus_lock = wm831x_irq_lock,
.bus_sync_unlock = wm831x_irq_sync_unlock,
.mask = wm831x_irq_mask,
.unmask = wm831x_irq_unmask,
+ .set_type = wm831x_irq_set_type,
};
/* The processing of the primary interrupt occurs in a thread so that
diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index e400a3bed06..b5807484b4c 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -363,6 +363,10 @@ int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref)
reg |= 1 << channel | WM8350_AUXADC_POLL;
wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg);
+ /* If a late IRQ left the completion signalled then consume
+ * the completion. */
+ try_wait_for_completion(&wm8350->auxadc_done);
+
/* We ignore the result of the completion and just check for a
* conversion result, allowing us to soldier on if the IRQ
* infrastructure is not set up for the chip. */
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index cc524df10aa..ec71c936890 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -173,9 +173,34 @@ static struct mfd_cell wm8994_regulator_devs[] = {
{ .name = "wm8994-ldo", .id = 2 },
};
+static struct resource wm8994_codec_resources[] = {
+ {
+ .start = WM8994_IRQ_TEMP_SHUT,
+ .end = WM8994_IRQ_TEMP_WARN,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource wm8994_gpio_resources[] = {
+ {
+ .start = WM8994_IRQ_GPIO(1),
+ .end = WM8994_IRQ_GPIO(11),
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
static struct mfd_cell wm8994_devs[] = {
- { .name = "wm8994-codec" },
- { .name = "wm8994-gpio" },
+ {
+ .name = "wm8994-codec",
+ .num_resources = ARRAY_SIZE(wm8994_codec_resources),
+ .resources = wm8994_codec_resources,
+ },
+
+ {
+ .name = "wm8994-gpio",
+ .num_resources = ARRAY_SIZE(wm8994_gpio_resources),
+ .resources = wm8994_gpio_resources,
+ },
};
/*
@@ -236,6 +261,11 @@ static int wm8994_device_resume(struct device *dev)
return ret;
}
+ ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK,
+ WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur);
+ if (ret < 0)
+ dev_err(dev, "Failed to restore interrupt masks: %d\n", ret);
+
ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2,
&wm8994->ldo_regs);
if (ret < 0)
@@ -348,6 +378,7 @@ static int wm8994_device_init(struct wm8994 *wm8994, unsigned long id, int irq)
if (pdata) {
+ wm8994->irq_base = pdata->irq_base;
wm8994->gpio_base = pdata->gpio_base;
/* GPIO configuration is only applied if it's non-zero */
@@ -375,16 +406,20 @@ static int wm8994_device_init(struct wm8994 *wm8994, unsigned long id, int irq)
WM8994_LDO1_DISCH, 0);
}
+ wm8994_irq_init(wm8994);
+
ret = mfd_add_devices(wm8994->dev, -1,
wm8994_devs, ARRAY_SIZE(wm8994_devs),
NULL, 0);
if (ret != 0) {
dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
- goto err_enable;
+ goto err_irq;
}
return 0;
+err_irq:
+ wm8994_irq_exit(wm8994);
err_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8994_main_supplies),
wm8994->supplies);
@@ -401,6 +436,7 @@ err:
static void wm8994_device_exit(struct wm8994 *wm8994)
{
mfd_remove_devices(wm8994->dev);
+ wm8994_irq_exit(wm8994);
regulator_bulk_disable(ARRAY_SIZE(wm8994_main_supplies),
wm8994->supplies);
regulator_bulk_free(ARRAY_SIZE(wm8994_main_supplies), wm8994->supplies);
@@ -469,6 +505,7 @@ static int wm8994_i2c_probe(struct i2c_client *i2c,
wm8994->control_data = i2c;
wm8994->read_dev = wm8994_i2c_read_device;
wm8994->write_dev = wm8994_i2c_write_device;
+ wm8994->irq = i2c->irq;
return wm8994_device_init(wm8994, id->driver_data, i2c->irq);
}
diff --git a/drivers/mfd/wm8994-irq.c b/drivers/mfd/wm8994-irq.c
new file mode 100644
index 00000000000..8400eb1ee5d
--- /dev/null
+++ b/drivers/mfd/wm8994-irq.c
@@ -0,0 +1,310 @@
+/*
+ * wm8994-irq.c -- Interrupt controller support for Wolfson WM8994
+ *
+ * Copyright 2010 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.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; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/interrupt.h>
+
+#include <linux/mfd/wm8994/core.h>
+#include <linux/mfd/wm8994/registers.h>
+
+#include <linux/delay.h>
+
+struct wm8994_irq_data {
+ int reg;
+ int mask;
+};
+
+static struct wm8994_irq_data wm8994_irqs[] = {
+ [WM8994_IRQ_TEMP_SHUT] = {
+ .reg = 2,
+ .mask = WM8994_TEMP_SHUT_EINT,
+ },
+ [WM8994_IRQ_MIC1_DET] = {
+ .reg = 2,
+ .mask = WM8994_MIC1_DET_EINT,
+ },
+ [WM8994_IRQ_MIC1_SHRT] = {
+ .reg = 2,
+ .mask = WM8994_MIC1_SHRT_EINT,
+ },
+ [WM8994_IRQ_MIC2_DET] = {
+ .reg = 2,
+ .mask = WM8994_MIC2_DET_EINT,
+ },
+ [WM8994_IRQ_MIC2_SHRT] = {
+ .reg = 2,
+ .mask = WM8994_MIC2_SHRT_EINT,
+ },
+ [WM8994_IRQ_FLL1_LOCK] = {
+ .reg = 2,
+ .mask = WM8994_FLL1_LOCK_EINT,
+ },
+ [WM8994_IRQ_FLL2_LOCK] = {
+ .reg = 2,
+ .mask = WM8994_FLL2_LOCK_EINT,
+ },
+ [WM8994_IRQ_SRC1_LOCK] = {
+ .reg = 2,
+ .mask = WM8994_SRC1_LOCK_EINT,
+ },
+ [WM8994_IRQ_SRC2_LOCK] = {
+ .reg = 2,
+ .mask = WM8994_SRC2_LOCK_EINT,
+ },
+ [WM8994_IRQ_AIF1DRC1_SIG_DET] = {
+ .reg = 2,
+ .mask = WM8994_AIF1DRC1_SIG_DET,
+ },
+ [WM8994_IRQ_AIF1DRC2_SIG_DET] = {
+ .reg = 2,
+ .mask = WM8994_AIF1DRC2_SIG_DET_EINT,
+ },
+ [WM8994_IRQ_AIF2DRC_SIG_DET] = {
+ .reg = 2,
+ .mask = WM8994_AIF2DRC_SIG_DET_EINT,
+ },
+ [WM8994_IRQ_FIFOS_ERR] = {
+ .reg = 2,
+ .mask = WM8994_FIFOS_ERR_EINT,
+ },
+ [WM8994_IRQ_WSEQ_DONE] = {
+ .reg = 2,
+ .mask = WM8994_WSEQ_DONE_EINT,
+ },
+ [WM8994_IRQ_DCS_DONE] = {
+ .reg = 2,
+ .mask = WM8994_DCS_DONE_EINT,
+ },
+ [WM8994_IRQ_TEMP_WARN] = {
+ .reg = 2,
+ .mask = WM8994_TEMP_WARN_EINT,
+ },
+ [WM8994_IRQ_GPIO(1)] = {
+ .reg = 1,
+ .mask = WM8994_GP1_EINT,
+ },
+ [WM8994_IRQ_GPIO(2)] = {
+ .reg = 1,
+ .mask = WM8994_GP2_EINT,
+ },
+ [WM8994_IRQ_GPIO(3)] = {
+ .reg = 1,
+ .mask = WM8994_GP3_EINT,
+ },
+ [WM8994_IRQ_GPIO(4)] = {
+ .reg = 1,
+ .mask = WM8994_GP4_EINT,
+ },
+ [WM8994_IRQ_GPIO(5)] = {
+ .reg = 1,
+ .mask = WM8994_GP5_EINT,
+ },
+ [WM8994_IRQ_GPIO(6)] = {
+ .reg = 1,
+ .mask = WM8994_GP6_EINT,
+ },
+ [WM8994_IRQ_GPIO(7)] = {
+ .reg = 1,
+ .mask = WM8994_GP7_EINT,
+ },
+ [WM8994_IRQ_GPIO(8)] = {
+ .reg = 1,
+ .mask = WM8994_GP8_EINT,
+ },
+ [WM8994_IRQ_GPIO(9)] = {
+ .reg = 1,
+ .mask = WM8994_GP8_EINT,
+ },
+ [WM8994_IRQ_GPIO(10)] = {
+ .reg = 1,
+ .mask = WM8994_GP10_EINT,
+ },
+ [WM8994_IRQ_GPIO(11)] = {
+ .reg = 1,
+ .mask = WM8994_GP11_EINT,
+ },
+};
+
+static inline int irq_data_to_status_reg(struct wm8994_irq_data *irq_data)
+{
+ return WM8994_INTERRUPT_STATUS_1 - 1 + irq_data->reg;
+}
+
+static inline int irq_data_to_mask_reg(struct wm8994_irq_data *irq_data)
+{
+ return WM8994_INTERRUPT_STATUS_1_MASK - 1 + irq_data->reg;
+}
+
+static inline struct wm8994_irq_data *irq_to_wm8994_irq(struct wm8994 *wm8994,
+ int irq)
+{
+ return &wm8994_irqs[irq - wm8994->irq_base];
+}
+
+static void wm8994_irq_lock(unsigned int irq)
+{
+ struct wm8994 *wm8994 = get_irq_chip_data(irq);
+
+ mutex_lock(&wm8994->irq_lock);
+}
+
+static void wm8994_irq_sync_unlock(unsigned int irq)
+{
+ struct wm8994 *wm8994 = get_irq_chip_data(irq);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
+ /* If there's been a change in the mask write it back
+ * to the hardware. */
+ if (wm8994->irq_masks_cur[i] != wm8994->irq_masks_cache[i]) {
+ wm8994->irq_masks_cache[i] = wm8994->irq_masks_cur[i];
+ wm8994_reg_write(wm8994,
+ WM8994_INTERRUPT_STATUS_1_MASK + i,
+ wm8994->irq_masks_cur[i]);
+ }
+ }
+
+ mutex_unlock(&wm8994->irq_lock);
+}
+
+static void wm8994_irq_unmask(unsigned int irq)
+{
+ struct wm8994 *wm8994 = get_irq_chip_data(irq);
+ struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994, irq);
+
+ wm8994->irq_masks_cur[irq_data->reg - 1] &= ~irq_data->mask;
+}
+
+static void wm8994_irq_mask(unsigned int irq)
+{
+ struct wm8994 *wm8994 = get_irq_chip_data(irq);
+ struct wm8994_irq_data *irq_data = irq_to_wm8994_irq(wm8994, irq);
+
+ wm8994->irq_masks_cur[irq_data->reg - 1] |= irq_data->mask;
+}
+
+static struct irq_chip wm8994_irq_chip = {
+ .name = "wm8994",
+ .bus_lock = wm8994_irq_lock,
+ .bus_sync_unlock = wm8994_irq_sync_unlock,
+ .mask = wm8994_irq_mask,
+ .unmask = wm8994_irq_unmask,
+};
+
+/* The processing of the primary interrupt occurs in a thread so that
+ * we can interact with the device over I2C or SPI. */
+static irqreturn_t wm8994_irq_thread(int irq, void *data)
+{
+ struct wm8994 *wm8994 = data;
+ unsigned int i;
+ u16 status[WM8994_NUM_IRQ_REGS];
+ int ret;
+
+ ret = wm8994_bulk_read(wm8994, WM8994_INTERRUPT_STATUS_1,
+ WM8994_NUM_IRQ_REGS, status);
+ if (ret < 0) {
+ dev_err(wm8994->dev, "Failed to read interrupt status: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ /* Apply masking */
+ for (i = 0; i < WM8994_NUM_IRQ_REGS; i++)
+ status[i] &= ~wm8994->irq_masks_cur[i];
+
+ /* Report */
+ for (i = 0; i < ARRAY_SIZE(wm8994_irqs); i++) {
+ if (status[wm8994_irqs[i].reg - 1] & wm8994_irqs[i].mask)
+ handle_nested_irq(wm8994->irq_base + i);
+ }
+
+ /* Ack any unmasked IRQs */
+ for (i = 0; i < ARRAY_SIZE(status); i++) {
+ if (status[i])
+ wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1 + i,
+ status[i]);
+ }
+
+ return IRQ_HANDLED;
+}
+
+int wm8994_irq_init(struct wm8994 *wm8994)
+{
+ int i, cur_irq, ret;
+
+ mutex_init(&wm8994->irq_lock);
+
+ /* Mask the individual interrupt sources */
+ for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) {
+ wm8994->irq_masks_cur[i] = 0xffff;
+ wm8994->irq_masks_cache[i] = 0xffff;
+ wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK + i,
+ 0xffff);
+ }
+
+ if (!wm8994->irq) {
+ dev_warn(wm8994->dev,
+ "No interrupt specified, no interrupts\n");
+ wm8994->irq_base = 0;
+ return 0;
+ }
+
+ if (!wm8994->irq_base) {
+ dev_err(wm8994->dev,
+ "No interrupt base specified, no interrupts\n");
+ return 0;
+ }
+
+ /* Register them with genirq */
+ for (cur_irq = wm8994->irq_base;
+ cur_irq < ARRAY_SIZE(wm8994_irqs) + wm8994->irq_base;
+ cur_irq++) {
+ set_irq_chip_data(cur_irq, wm8994);
+ set_irq_chip_and_handler(cur_irq, &wm8994_irq_chip,
+ handle_edge_irq);
+ set_irq_nested_thread(cur_irq, 1);
+
+ /* ARM needs us to explicitly flag the IRQ as valid
+ * and will set them noprobe when we do so. */
+#ifdef CONFIG_ARM
+ set_irq_flags(cur_irq, IRQF_VALID);
+#else
+ set_irq_noprobe(cur_irq);
+#endif
+ }
+
+ ret = request_threaded_irq(wm8994->irq, NULL, wm8994_irq_thread,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "wm8994", wm8994);
+ if (ret != 0) {
+ dev_err(wm8994->dev, "Failed to request IRQ %d: %d\n",
+ wm8994->irq, ret);
+ return ret;
+ }
+
+ /* Enable top level interrupt if it was masked */
+ wm8994_reg_write(wm8994, WM8994_INTERRUPT_CONTROL, 0);
+
+ return 0;
+}
+
+void wm8994_irq_exit(struct wm8994 *wm8994)
+{
+ if (wm8994->irq)
+ free_irq(wm8994->irq, wm8994);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 19:34:34 +0000