Since the SSC is already being registered as a device under arch and the DMA and SSC hardware are pretty much the same provide a simplified device registration function for the Atmel SSC which will add the ASoC-specific devices within the ASoC code, parenting the SSC device off the actual SSC device. Also use it in the sam9g20-ek driver.

Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/atmel/atmel_ssc_dai.c | 57 ++++++++++++++++++++++++++++++++++++-- sound/soc/atmel/atmel_ssc_dai.h | 2 + sound/soc/atmel/sam9g20_wm8731.c | 6 ++++ 3 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index eabf66a..5d230ce 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -789,13 +789,14 @@ static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {

static __devinit int asoc_ssc_probe(struct platform_device *pdev) { - return snd_soc_register_dais(&pdev->dev, atmel_ssc_dai, - ARRAY_SIZE(atmel_ssc_dai)); + 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_dais(&pdev->dev, ARRAY_SIZE(atmel_ssc_dai)); + snd_soc_unregister_dai(&pdev->dev); return 0; }

@@ -809,6 +810,56 @@ static struct platform_driver asoc_ssc_driver = { .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 platform_driver_register(&asoc_ssc_driver); diff --git a/sound/soc/atmel/atmel_ssc_dai.h b/sound/soc/atmel/atmel_ssc_dai.h index 392a469..5d4f0f9 100644 --- a/sound/soc/atmel/atmel_ssc_dai.h +++ b/sound/soc/atmel/atmel_ssc_dai.h @@ -117,4 +117,6 @@ struct atmel_ssc_info { struct atmel_ssc_state ssc_state; };

+int atmel_ssc_set_audio(int ssc); + #endif /* _AT91_SSC_DAI_H */ diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c index cf029a8..293569d 100644 --- a/sound/soc/atmel/sam9g20_wm8731.c +++ b/sound/soc/atmel/sam9g20_wm8731.c @@ -205,6 +205,12 @@ static int __init at91sam9g20ek_init(void) if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc())) return -ENODEV;

+ ret = atmel_ssc_set_audio(0); + if (ret != 0) { + pr_err("Failed to set SSC 0 for audio: %d\n", ret); + return ret; + } + /* * Codec MCLK is supplied by PCK0 - set it up. */