summaryrefslogtreecommitdiffstats
path: root/sound/soc/atmel/atmel_ssc_dai.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/atmel/atmel_ssc_dai.c')
-rw-r--r--sound/soc/atmel/atmel_ssc_dai.c148
1 files changed, 123 insertions, 25 deletions
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index c85844d4845..5d230cee3fa 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -205,8 +205,7 @@ 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 snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
- struct atmel_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
int dir_mask;
pr_debug("atmel_ssc_startup: SSC_SR=0x%u\n",
@@ -235,8 +234,7 @@ 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 snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
- struct atmel_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
struct atmel_pcm_dma_params *dma_params;
int dir, dir_mask;
@@ -338,7 +336,7 @@ 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 = rtd->dai->cpu_dai->id;
+ int id = dai->id;
struct atmel_ssc_info *ssc_p = &ssc_info[id];
struct atmel_pcm_dma_params *dma_params;
int dir, channels, bits;
@@ -368,7 +366,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
* function. It should not be used for other purposes
* as it is common to all substreams.
*/
- snd_soc_dai_set_dma_data(rtd->dai->cpu_dai, substream, dma_params);
+ snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_params);
channels = params_channels(params);
@@ -605,8 +603,7 @@ 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 snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
- struct atmel_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+ struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
struct atmel_pcm_dma_params *dma_params;
int dir;
@@ -690,6 +687,32 @@ static int atmel_ssc_resume(struct snd_soc_dai *cpu_dai)
# define atmel_ssc_resume NULL
#endif /* CONFIG_PM */
+static int atmel_ssc_probe(struct snd_soc_dai *dai)
+{
+ struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
+ int ret = 0;
+
+ 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;
+}
#define ATMEL_SSC_RATES (SNDRV_PCM_RATE_8000_96000)
@@ -705,9 +728,11 @@ static struct snd_soc_dai_ops atmel_ssc_dai_ops = {
.set_clkdiv = atmel_ssc_set_dai_clkdiv,
};
-struct snd_soc_dai atmel_ssc_dai[NUM_SSC_DEVICES] = {
- { .name = "atmel-ssc0",
- .id = 0,
+static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
+ {
+ .name = "atmel-ssc-dai.0",
+ .probe = atmel_ssc_probe,
+ .remove = atmel_ssc_remove,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
@@ -721,11 +746,12 @@ struct snd_soc_dai atmel_ssc_dai[NUM_SSC_DEVICES] = {
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = &atmel_ssc_dai_ops,
- .private_data = &ssc_info[0],
},
#if NUM_SSC_DEVICES == 3
- { .name = "atmel-ssc1",
- .id = 1,
+ {
+ .name = "atmel-ssc-dai.1",
+ .probe = atmel_ssc_probe,
+ .remove = atmel_ssc_remove,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
@@ -739,10 +765,11 @@ struct snd_soc_dai atmel_ssc_dai[NUM_SSC_DEVICES] = {
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = &atmel_ssc_dai_ops,
- .private_data = &ssc_info[1],
},
- { .name = "atmel-ssc2",
- .id = 2,
+ {
+ .name = "atmel-ssc-dai.2",
+ .probe = atmel_ssc_probe,
+ .remove = atmel_ssc_remove,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
@@ -756,23 +783,94 @@ struct snd_soc_dai atmel_ssc_dai[NUM_SSC_DEVICES] = {
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = &atmel_ssc_dai_ops,
- .private_data = &ssc_info[2],
},
#endif
};
-EXPORT_SYMBOL_GPL(atmel_ssc_dai);
-static int __init atmel_ssc_modinit(void)
+static __devinit int asoc_ssc_probe(struct platform_device *pdev)
+{
+ 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]);
+}
+
+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,
+ },
+
+ .probe = asoc_ssc_probe,
+ .remove = __devexit_p(asoc_ssc_remove),
+};
+
+/**
+ * atmel_ssc_set_audio - Allocate the specified SSC for audio use.
+ */
+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) {
+ ssc_free(ssc);
+ 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",
+ PTR_ERR(ssc));
+ else
+ ssc_pdev->dev.parent = &(ssc->pdev->dev);
+ ssc_free(ssc);
+
+ ret = platform_device_add(ssc_pdev);
+ if (ret < 0)
+ platform_device_put(ssc_pdev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_set_audio);
+
+static int __init snd_atmel_ssc_init(void)
{
- return snd_soc_register_dais(atmel_ssc_dai, ARRAY_SIZE(atmel_ssc_dai));
+ return platform_driver_register(&asoc_ssc_driver);
}
-module_init(atmel_ssc_modinit);
+module_init(snd_atmel_ssc_init);
-static void __exit atmel_ssc_modexit(void)
+static void __exit snd_atmel_ssc_exit(void)
{
- snd_soc_unregister_dais(atmel_ssc_dai, ARRAY_SIZE(atmel_ssc_dai));
+ platform_driver_unregister(&asoc_ssc_driver);
}
-module_exit(atmel_ssc_modexit);
+module_exit(snd_atmel_ssc_exit);
/* Module information */
MODULE_AUTHOR("Sedji Gaouaou, sedji.gaouaou@atmel.com, www.atmel.com");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 11:19:17 +0000