[RFC PATCH v4 1/2] ASoC: atmel-ssc-dai: register dai and pcm directly
Bo Shen
voice.shen at atmel.com
Thu Nov 8 02:57:01 EST 2012
change the method for register dai and pcm
- let the atmel-ssc-dai no longer as a standalone platform device
- remap ssc and then register dai directly
- register pcm from dai directly
Modify the code which related with this change
Signed-off-by: Bo Shen <voice.shen at atmel.com>
---
Change since v3 RFC
- remap ssc and then register dai and pcm directly
Change since v2
- Register dai and pcm directly according to Mark Brown's suggestion
- using name to distinguish ssc register for audio or library
if for audio, the name with dai subfix
if for library, the name without dai subfix
- fix the issue for sam9g20-wm8731
- when register dai and pcm cause the sam9g20-wm8731 doesn't work,
so fix it
- Add device tree support
- Detail information reference atmel-ssc-dai.txt binding document
Change since v1
No change
---
arch/arm/mach-at91/at91sam9260_devices.c | 9 --
arch/arm/mach-at91/board-sam9g20ek.c | 8 +-
sound/soc/atmel/atmel-pcm.c | 23 +--
sound/soc/atmel/atmel-pcm.h | 3 +
sound/soc/atmel/atmel_ssc_dai.c | 228 +++++++-----------------------
sound/soc/atmel/atmel_ssc_dai.h | 1 +
sound/soc/atmel/sam9g20_wm8731.c | 13 +-
7 files changed, 76 insertions(+), 209 deletions(-)
diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index df7bebf..6959fd2 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -768,14 +768,6 @@ static inline void configure_ssc_pins(unsigned pins)
at91_set_A_periph(AT91_PIN_PB21, 1);
}
-static struct platform_device at91sam9260_ssc_dai_device = {
- .name = "atmel-ssc-dai",
- .id = 0,
- .dev = {
- .parent = &(at91sam9260_ssc_device.dev),
- },
-};
-
/*
* SSC controllers are accessed through library code, instead of any
* kind of all-singing/all-dancing driver. For example one could be
@@ -800,7 +792,6 @@ void __init at91_add_device_ssc(unsigned id, unsigned pins)
}
platform_device_register(pdev);
- platform_device_register(&at91sam9260_ssc_dai_device);
}
#else
diff --git a/arch/arm/mach-at91/board-sam9g20ek.c b/arch/arm/mach-at91/board-sam9g20ek.c
index 5b6a6f9..f3faf54 100644
--- a/arch/arm/mach-at91/board-sam9g20ek.c
+++ b/arch/arm/mach-at91/board-sam9g20ek.c
@@ -353,19 +353,13 @@ static struct i2c_board_info __initdata ek_i2c_devices[] = {
},
};
-static struct platform_device sam9g20ek_pcm_device = {
- .name = "atmel-pcm-audio",
- .id = -1,
-};
-
static struct platform_device sam9g20ek_audio_device = {
.name = "at91sam9g20ek-audio",
- .id = -1,
+ .id = 0,
};
static void __init ek_add_device_audio(void)
{
- platform_device_register(&sam9g20ek_pcm_device);
platform_device_register(&sam9g20ek_audio_device);
}
diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c
index 9b84f98..40e17d1 100644
--- a/sound/soc/atmel/atmel-pcm.c
+++ b/sound/soc/atmel/atmel-pcm.c
@@ -473,28 +473,17 @@ static struct snd_soc_platform_driver atmel_soc_platform = {
.resume = atmel_pcm_resume,
};
-static int __devinit atmel_soc_platform_probe(struct platform_device *pdev)
+int atmel_pcm_platform_register(struct device *dev)
{
- return snd_soc_register_platform(&pdev->dev, &atmel_soc_platform);
+ return snd_soc_register_platform(dev, &atmel_soc_platform);
}
+EXPORT_SYMBOL(atmel_pcm_platform_register);
-static int __devexit atmel_soc_platform_remove(struct platform_device *pdev)
+void atmel_pcm_platform_unregister(struct device *dev)
{
- snd_soc_unregister_platform(&pdev->dev);
- return 0;
+ snd_soc_unregister_platform(dev);
}
-
-static struct platform_driver atmel_pcm_driver = {
- .driver = {
- .name = "atmel-pcm-audio",
- .owner = THIS_MODULE,
- },
-
- .probe = atmel_soc_platform_probe,
- .remove = __devexit_p(atmel_soc_platform_remove),
-};
-
-module_platform_driver(atmel_pcm_driver);
+EXPORT_SYMBOL(atmel_pcm_platform_unregister);
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou at atmel.com>");
MODULE_DESCRIPTION("Atmel PCM module");
diff --git a/sound/soc/atmel/atmel-pcm.h b/sound/soc/atmel/atmel-pcm.h
index 5e0a95e..e6d67b3 100644
--- a/sound/soc/atmel/atmel-pcm.h
+++ b/sound/soc/atmel/atmel-pcm.h
@@ -80,4 +80,7 @@ struct atmel_pcm_dma_params {
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
+int atmel_pcm_platform_register(struct device *dev);
+void atmel_pcm_platform_unregister(struct device *dev);
+
#endif /* _ATMEL_PCM_H */
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index 354341e..4435e19 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -47,13 +47,6 @@
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"
-
-#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
-#define NUM_SSC_DEVICES 1
-#else
-#define NUM_SSC_DEVICES 3
-#endif
-
/*
* SSC PDC registers required by the PCM DMA engine.
*/
@@ -96,63 +89,24 @@ static struct atmel_ssc_mask ssc_rx_mask = {
/*
* DMA parameters.
*/
-static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
- {{
- .name = "SSC0 PCM out",
- .pdc = &pdc_tx_reg,
- .mask = &ssc_tx_mask,
- },
+static struct atmel_pcm_dma_params ssc_dma_params[2] = {
{
- .name = "SSC0 PCM in",
- .pdc = &pdc_rx_reg,
- .mask = &ssc_rx_mask,
- } },
-#if NUM_SSC_DEVICES == 3
- {{
- .name = "SSC1 PCM out",
+ .name = "SSC PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
- .name = "SSC1 PCM in",
+ .name = "SSC PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
- } },
- {{
- .name = "SSC2 PCM out",
- .pdc = &pdc_tx_reg,
- .mask = &ssc_tx_mask,
},
- {
- .name = "SSC2 PCM in",
- .pdc = &pdc_rx_reg,
- .mask = &ssc_rx_mask,
- } },
-#endif
};
-
-static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
- {
- .name = "ssc0",
- .lock = __SPIN_LOCK_UNLOCKED(ssc_info[0].lock),
- .dir_mask = SSC_DIR_MASK_UNUSED,
- .initialized = 0,
- },
-#if NUM_SSC_DEVICES == 3
- {
- .name = "ssc1",
- .lock = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
+static struct atmel_ssc_info ssc_info = {
+ .name = "ssc",
+ .lock = __SPIN_LOCK_UNLOCKED(ssc_info.lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
- },
- {
- .name = "ssc2",
- .lock = __SPIN_LOCK_UNLOCKED(ssc_info[2].lock),
- .dir_mask = SSC_DIR_MASK_UNUSED,
- .initialized = 0,
- },
-#endif
};
@@ -205,7 +159,7 @@ static irqreturn_t atmel_ssc_interrupt(int irq, void *dev_id)
static int atmel_ssc_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info;
int dir_mask;
pr_debug("atmel_ssc_startup: SSC_SR=0x%u\n",
@@ -234,7 +188,7 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream,
static void atmel_ssc_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info;
struct atmel_pcm_dma_params *dma_params;
int dir, dir_mask;
@@ -285,7 +239,7 @@ static void atmel_ssc_shutdown(struct snd_pcm_substream *substream,
static int atmel_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
- struct atmel_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info;
ssc_p->daifmt = fmt;
return 0;
@@ -297,7 +251,7 @@ static int atmel_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
static int atmel_ssc_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
- struct atmel_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info;
switch (div_id) {
case ATMEL_SSC_CMR_DIV:
@@ -336,8 +290,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
- int id = dai->id;
- struct atmel_ssc_info *ssc_p = &ssc_info[id];
+ struct atmel_ssc_info *ssc_p = &ssc_info;
struct atmel_pcm_dma_params *dma_params;
int dir, channels, bits;
u32 tfmr, rfmr, tcmr, rcmr;
@@ -354,7 +307,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
else
dir = 1;
- dma_params = &ssc_dma_params[id][dir];
+ dma_params = &ssc_dma_params[dir];
dma_params->ssc = ssc_p->ssc;
dma_params->substream = substream;
@@ -603,7 +556,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
static int atmel_ssc_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
- struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info;
struct atmel_pcm_dma_params *dma_params;
int dir;
@@ -631,7 +584,7 @@ static int atmel_ssc_suspend(struct snd_soc_dai *cpu_dai)
if (!cpu_dai->active)
return 0;
- ssc_p = &ssc_info[cpu_dai->id];
+ ssc_p = &ssc_info;
/* Save the status register before disabling transmit and receive */
ssc_p->ssc_state.ssc_sr = ssc_readl(ssc_p->ssc->regs, SR);
@@ -660,7 +613,7 @@ static int atmel_ssc_resume(struct snd_soc_dai *cpu_dai)
if (!cpu_dai->active)
return 0;
- ssc_p = &ssc_info[cpu_dai->id];
+ ssc_p = &ssc_info;
/* restore SSC register settings */
ssc_writel(ssc_p->ssc->regs, TFMR, ssc_p->ssc_state.ssc_tfmr);
@@ -689,28 +642,10 @@ static int atmel_ssc_resume(struct snd_soc_dai *cpu_dai)
static int atmel_ssc_probe(struct snd_soc_dai *dai)
{
- struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
- int ret = 0;
+ struct atmel_ssc_info *ssc_p = &ssc_info;
snd_soc_dai_set_drvdata(dai, ssc_p);
- /*
- * Request SSC device
- */
- ssc_p->ssc = ssc_request(dai->id);
- if (IS_ERR(ssc_p->ssc)) {
- printk(KERN_ERR "ASoC: Failed to request SSC %d\n", dai->id);
- ret = PTR_ERR(ssc_p->ssc);
- }
-
- return ret;
-}
-
-static int atmel_ssc_remove(struct snd_soc_dai *dai)
-{
- struct atmel_ssc_info *ssc_p = snd_soc_dai_get_drvdata(dai);
-
- ssc_free(ssc_p->ssc);
return 0;
}
@@ -728,11 +663,8 @@ static const struct snd_soc_dai_ops atmel_ssc_dai_ops = {
.set_clkdiv = atmel_ssc_set_dai_clkdiv,
};
-static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
- {
- .name = "atmel-ssc-dai.0",
+static struct snd_soc_dai_driver atmel_ssc_dai = {
.probe = atmel_ssc_probe,
- .remove = atmel_ssc_remove,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
@@ -746,69 +678,37 @@ static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = &atmel_ssc_dai_ops,
- },
-#if NUM_SSC_DEVICES == 3
- {
- .name = "atmel-ssc-dai.1",
- .probe = atmel_ssc_probe,
- .remove = atmel_ssc_remove,
- .suspend = atmel_ssc_suspend,
- .resume = atmel_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .ops = &atmel_ssc_dai_ops,
- },
- {
- .name = "atmel-ssc-dai.2",
- .probe = atmel_ssc_probe,
- .remove = atmel_ssc_remove,
- .suspend = atmel_ssc_suspend,
- .resume = atmel_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .ops = &atmel_ssc_dai_ops,
- },
-#endif
};
-static __devinit int asoc_ssc_probe(struct platform_device *pdev)
+static int asoc_ssc_init(struct device *dev)
{
- BUG_ON(pdev->id < 0);
- BUG_ON(pdev->id >= ARRAY_SIZE(atmel_ssc_dai));
- return snd_soc_register_dai(&pdev->dev, &atmel_ssc_dai[pdev->id]);
-}
+ int ret;
+
+ ret = snd_soc_register_dai(dev, &atmel_ssc_dai);
+ if (ret) {
+ dev_err(dev, "Could not register DAI: %d\n", ret);
+ goto err;
+ }
+
+ ret = atmel_pcm_platform_register(dev);
+ if (ret) {
+ dev_err(dev, "Could not register PCM: %d\n", ret);
+ goto err_unregister_dai;
+ };
-static int __devexit asoc_ssc_remove(struct platform_device *pdev)
-{
- snd_soc_unregister_dai(&pdev->dev);
return 0;
-}
-static struct platform_driver asoc_ssc_driver = {
- .driver = {
- .name = "atmel-ssc-dai",
- .owner = THIS_MODULE,
- },
+err_unregister_dai:
+ snd_soc_unregister_dai(dev);
+err:
+ return ret;
+}
- .probe = asoc_ssc_probe,
- .remove = __devexit_p(asoc_ssc_remove),
-};
+static void asoc_ssc_exit(struct device *dev)
+{
+ atmel_pcm_platform_unregister(dev);
+ snd_soc_unregister_dai(dev);
+}
/**
* atmel_ssc_set_audio - Allocate the specified SSC for audio use.
@@ -816,50 +716,32 @@ static struct platform_driver asoc_ssc_driver = {
int atmel_ssc_set_audio(int ssc_id)
{
struct ssc_device *ssc;
- static struct platform_device *dma_pdev;
- struct platform_device *ssc_pdev;
int ret;
- if (ssc_id < 0 || ssc_id >= ARRAY_SIZE(atmel_ssc_dai))
- return -EINVAL;
-
- /* Allocate a dummy device for DMA if we don't have one already */
- if (!dma_pdev) {
- dma_pdev = platform_device_alloc("atmel-pcm-audio", -1);
- if (!dma_pdev)
- return -ENOMEM;
-
- ret = platform_device_add(dma_pdev);
- if (ret < 0) {
- platform_device_put(dma_pdev);
- dma_pdev = NULL;
- return ret;
- }
- }
-
- ssc_pdev = platform_device_alloc("atmel-ssc-dai", ssc_id);
- if (!ssc_pdev)
- return -ENOMEM;
-
/* If we can grab the SSC briefly to parent the DAI device off it */
ssc = ssc_request(ssc_id);
- if (IS_ERR(ssc))
- pr_warn("Unable to parent ASoC SSC DAI on SSC: %ld\n",
+ if (IS_ERR(ssc)) {
+ pr_err("Unable to parent ASoC SSC DAI on SSC: %ld\n",
PTR_ERR(ssc));
- else {
- ssc_pdev->dev.parent = &(ssc->pdev->dev);
- ssc_free(ssc);
+ return PTR_ERR(ssc);
+ } else {
+ ssc_info.ssc = ssc;
}
- ret = platform_device_add(ssc_pdev);
- if (ret < 0)
- platform_device_put(ssc_pdev);
+ ret = asoc_ssc_init(&ssc->pdev->dev);
return ret;
}
EXPORT_SYMBOL_GPL(atmel_ssc_set_audio);
-module_platform_driver(asoc_ssc_driver);
+void atmel_ssc_put_audio(void)
+{
+ struct ssc_device *ssc = ssc_info.ssc;
+
+ ssc_free(ssc);
+ asoc_ssc_exit(&ssc->pdev->dev);
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_put_audio);
/* Module information */
MODULE_AUTHOR("Sedji Gaouaou, sedji.gaouaou at atmel.com, www.atmel.com");
diff --git a/sound/soc/atmel/atmel_ssc_dai.h b/sound/soc/atmel/atmel_ssc_dai.h
index 5d4f0f9..70c66dd 100644
--- a/sound/soc/atmel/atmel_ssc_dai.h
+++ b/sound/soc/atmel/atmel_ssc_dai.h
@@ -118,5 +118,6 @@ struct atmel_ssc_info {
};
int atmel_ssc_set_audio(int ssc);
+void atmel_ssc_put_audio(void);
#endif /* _AT91_SSC_DAI_H */
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index 228ca6a..eef6eed 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -179,10 +179,10 @@ static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
static struct snd_soc_dai_link at91sam9g20ek_dai = {
.name = "WM8731",
.stream_name = "WM8731 PCM",
- .cpu_dai_name = "atmel-ssc-dai.0",
+ .cpu_dai_name = "at91rm9200_ssc.0",
.codec_dai_name = "wm8731-hifi",
.init = at91sam9g20ek_wm8731_init,
- .platform_name = "atmel-pcm-audio",
+ .platform_name = "at91rm9200_ssc.0",
.codec_name = "wm8731.0-001b",
.ops = &at91sam9g20ek_ops,
};
@@ -204,6 +204,10 @@ static int __devinit at91sam9g20ek_audio_probe(struct platform_device *pdev)
if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
return -ENODEV;
+ ret = atmel_ssc_set_audio(pdev->id);
+ if (ret)
+ goto err;
+
/*
* Codec MCLK is supplied by PCK0 - set it up.
*/
@@ -211,7 +215,7 @@ static int __devinit at91sam9g20ek_audio_probe(struct platform_device *pdev)
if (IS_ERR(mclk)) {
printk(KERN_ERR "ASoC: Failed to get MCLK\n");
ret = PTR_ERR(mclk);
- goto err;
+ goto err_ssc_put_audio;
}
pllb = clk_get(NULL, "pllb");
@@ -240,6 +244,8 @@ static int __devinit at91sam9g20ek_audio_probe(struct platform_device *pdev)
err_mclk:
clk_put(mclk);
mclk = NULL;
+err_ssc_put_audio:
+ atmel_ssc_put_audio();
err:
return ret;
}
@@ -248,6 +254,7 @@ static int __devexit at91sam9g20ek_audio_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
+ atmel_ssc_put_audio();
snd_soc_unregister_card(card);
clk_put(mclk);
mclk = NULL;
--
1.7.9.5
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