[RFC PATCH 08/13] sound: sam9x5_wm8731: machine driver for at91sam9x5 wm8731 boards
Richard Genoud
richard.genoud at gmail.com
Sat Jul 6 01:15:05 EST 2013
2013/7/2 Bo Shen <voice.shen at atmel.com>:
> Hi Richard,
>
> Will move this patch before 5, 6, 7?
yes, you're right.
>
>
> On 7/1/2013 16:39, Richard Genoud wrote:
>>
>> From: Nicolas Ferre <nicolas.ferre at atmel.com>
>>
>> Description of the Asoc machine driver for an at91sam9x5 based board
>> with a wm8731 audio DAC. Wm8731 is clocked by a crystal and used as a
>> master on the SSC/I2S interface. Its connections are a headphone jack
>> and an Line input jack.
>>
>> [Richard: this is based on an old patch from Nicolas that I forward
>> ported and reworked to use only device tree]
>>
>> Signed-off-by: Nicolas Ferre <nicolas.ferre at atmel.com>
>> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
>> Signed-off-by: Richard Genoud <richard.genoud at gmail.com>
>> ---
>> sound/soc/atmel/Kconfig | 12 ++
>> sound/soc/atmel/Makefile | 2 +
>> sound/soc/atmel/sam9x5_wm8731.c | 232
>> +++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 246 insertions(+)
>> create mode 100644 sound/soc/atmel/sam9x5_wm8731.c
>>
>> diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
>> index 3fdd87f..f24d601 100644
>> --- a/sound/soc/atmel/Kconfig
>> +++ b/sound/soc/atmel/Kconfig
>> @@ -13,6 +13,7 @@ config SND_ATMEL_SOC_PDC
>> config SND_ATMEL_SOC_DMA
>> tristate
>> depends on SND_ATMEL_SOC
>> + select SND_SOC_DMAENGINE_PCM
>>
>> config SND_ATMEL_SOC_SSC
>> tristate
>> @@ -32,6 +33,17 @@ config SND_AT91_SOC_SAM9G20_WM8731
>> Say Y if you want to add support for SoC audio on WM8731-based
>> AT91sam9g20 evaluation board.
>>
>> +config SND_AT91_SOC_SAM9X5_WM8731
>> + tristate "SoC Audio support for WM8731-based at91sam9x5 board"
>> + depends on ATMEL_SSC && SND_ATMEL_SOC && SOC_AT91SAM9X5
>> + select SND_ATMEL_SOC_SSC
>> + select SND_ATMEL_SOC_DMA
>> + select SND_ATMEL_SOC_PDC
>
>
> Not need to select SND_ATMEL_SOC_PDC
ok, I'll drop this
>> + select SND_SOC_WM8731
>> + help
>> + Say Y if you want to add support for audio SoC on an
>> + at91sam9x5 based board that is using WM8731 codec.
>> +
>> config SND_AT91_SOC_AFEB9260
>> tristate "SoC Audio support for AFEB9260 board"
>> depends on ARCH_AT91 && ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 &&
>> SND_ATMEL_SOC
>> diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile
>> index 41967cc..7784c09 100644
>> --- a/sound/soc/atmel/Makefile
>> +++ b/sound/soc/atmel/Makefile
>> @@ -11,6 +11,8 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) +=
>> snd-soc-atmel_ssc_dai.o
>>
>> # AT91 Machine Support
>> snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o
>> +snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o
>>
>> obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o
>> +obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o
>> obj-$(CONFIG_SND_AT91_SOC_AFEB9260) += snd-soc-afeb9260.o
>> diff --git a/sound/soc/atmel/sam9x5_wm8731.c
>> b/sound/soc/atmel/sam9x5_wm8731.c
>> new file mode 100644
>> index 0000000..83ca457
>> --- /dev/null
>> +++ b/sound/soc/atmel/sam9x5_wm8731.c
>> @@ -0,0 +1,232 @@
>> +/*
>> + * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
>> + * that are using WM8731 as codec.
>> + *
>> + * Copyright (C) 2011 Atmel,
>> + * Nicolas Ferre <nicolas.ferre at atmel.com>
>> + *
>> + * Based on sam9g20_wm8731.c by:
>> + * Sedji Gaouaou <sedji.gaouaou at atmel.com>
>> + *
>> + * GPL
>> + */
>> +#include <linux/module.h>
>> +#include <linux/moduleparam.h>
>> +#include <linux/kernel.h>
>> +#include <linux/clk.h>
>> +#include <linux/timer.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/i2c.h>
>> +
>> +#include <linux/atmel-ssc.h>
>> +
>> +#include <sound/core.h>
>> +#include <sound/pcm.h>
>> +#include <sound/pcm_params.h>
>> +#include <sound/soc.h>
>> +
>> +#include <asm/mach-types.h>
>> +#include <mach/hardware.h>
>> +#include <mach/gpio.h>
>> +
>> +#include "../codecs/wm8731.h"
>> +#include "atmel-pcm.h"
>> +#include "atmel_ssc_dai.h"
>> +
>> +#define MCLK_RATE 12288000
>> +
>> +#define DRV_NAME "sam9x5-snd-wm8731"
>> +
>> +/*
>> + * Audio paths on at91sam9x5ek board:
>> + *
>> + * |A| ------------> | | ---R----> Headphone Jack
>> + * |T| <----\ | WM | ---L--/
>> + * |9| ---> CLK <--> | 8751 | <--R----- Line In Jack
>> + * |1| <------------ | | <--L--/
>> + */
>> +static const struct snd_soc_dapm_widget at91sam9x5ek_dapm_widgets[] = {
>> + SND_SOC_DAPM_HP("Headphone Jack", NULL),
>> + SND_SOC_DAPM_LINE("Line In Jack", NULL),
>> +};
>> +
>> +/*
>> + * Logic for a wm8731 as connected on a at91sam9x5 based board.
>> + */
>> +static int at91sam9x5ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
>> +{
>> + struct snd_soc_codec *codec = rtd->codec;
>> + struct snd_soc_dai *codec_dai = rtd->codec_dai;
>> + struct snd_soc_dapm_context *dapm = &codec->dapm;
>> + struct device *dev = rtd->dev;
>> + int ret;
>> +
>> + dev_dbg(dev, "ASoC: at91sam9x5ek_wm8731_init() called\n");
>> +
>> + /*
>> + * remove some not supported rates in relation with clock
>> + * provided to the wm8731 codec
>> + */
>> + switch (MCLK_RATE) {
>> + case 12288000:
>> + codec_dai->driver->playback.rates &= SNDRV_PCM_RATE_8000 |
>> + SNDRV_PCM_RATE_32000
>> |
>> + SNDRV_PCM_RATE_48000
>> |
>> + SNDRV_PCM_RATE_96000;
>> + codec_dai->driver->capture.rates &= SNDRV_PCM_RATE_8000 |
>> + SNDRV_PCM_RATE_32000 |
>> + SNDRV_PCM_RATE_48000 |
>> + SNDRV_PCM_RATE_96000;
>> + break;
>> + case 12000000:
>> + /* all wm8731 rates supported */
>> + break;
>> + default:
>> + dev_err(dev, "ASoC: Codec Master clock rate not
>> defined\n");
>> + return -EINVAL;
>> + }
>
>
> Here, I think we not need to use switch ... case, as the MCLK_RATE is hard
> code as 12288000.
yes, I'll drop the code for != 12288000
>
> -----------------------------------------------
>
>
>> + /* set not connected pins */
>> + snd_soc_dapm_nc_pin(dapm, "Mic Bias");
>> + snd_soc_dapm_nc_pin(dapm, "MICIN");
>> + snd_soc_dapm_nc_pin(dapm, "LOUT");
>> + snd_soc_dapm_nc_pin(dapm, "ROUT");
>> +
>> + /* always connected */
>> + snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
>> + snd_soc_dapm_enable_pin(dapm, "Line In Jack");
>
>
> ------------------------------------------------
> This part, not needed, as to the ASoC framework will deal with it.
ok !
>
>
>> + /* set the codec system clock for DAC and ADC */
>> + ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
>> + MCLK_RATE, SND_SOC_CLOCK_IN);
>> + if (ret < 0) {
>> + dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n",
>> ret);
>> + return ret;
>> + }
>> +
>> + /* signal a DAPM event */
>> + snd_soc_dapm_sync(dapm);
>> + return 0;
>> +}
>> +
>> +static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
>> +{
>> + struct device_node *np = pdev->dev.of_node;
>> + struct device_node *codec_np, *cpu_np;
>> + struct snd_soc_card *card;
>> + struct snd_soc_dai_link *dai;
>> + int ret;
>> +
>> + if (!np) {
>> + dev_err(&pdev->dev, "No device node supplied\n");
>> + return -EINVAL;
>> + }
>> +
>> + ret = atmel_ssc_set_audio(0);
>> + if (ret != 0) {
>> + dev_err(&pdev->dev,
>> + "ASoC: Failed to set SSC 0 for audio: %d\n", ret);
>> + return ret;
>> + }
>> +
>> + card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
>> + dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
>> + if (!dai || !card) {
>> + ret = -ENOMEM;
>> + goto out;
>> + }
>> +
>> + card->dev = &pdev->dev;
>> + card->owner = THIS_MODULE;
>> + card->dai_link = dai;
>> + card->num_links = 1;
>> + dai->name = "WM8731";
>> + dai->stream_name = "WM8731 PCM";
>> + dai->codec_dai_name = "wm8731-hifi";
>> + dai->init = at91sam9x5ek_wm8731_init;
>> + card->dapm_widgets = at91sam9x5ek_dapm_widgets;
>> + card->num_dapm_widgets = ARRAY_SIZE(at91sam9x5ek_dapm_widgets);
>
>
> Will keep these as snd_soc_card and snd_soc_dai_link structure separately?
I don't really understand what you mean here.
do you mean that something like that will more explicit ? :
+ card->dai_link[0].name = "WM8731";
+ card->dai_link[0].stream_name = "WM8731 PCM";
+ card->dai_link[0].codec_dai_name = "wm8731-hifi";
+ card->dai_link[0].init = at91sam9x5ek_wm8731_init;
>
>
>> + ret = snd_soc_of_parse_card_name(card, "atmel,model");
>> + if (ret)
>> + goto out;
>> +
>> + ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
>> + if (ret)
>> + goto out;
>> +
>> + codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
>> + if (!codec_np) {
>> + dev_err(&pdev->dev, "codec info missing\n");
>> + ret = -EINVAL;
>> + goto out;
>> + }
>> +
>> + dai->codec_of_node = codec_np;
>> +
>> + cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
>> + if (!cpu_np) {
>> + dev_err(&pdev->dev, "ssc controller node missing\n");
>> + ret = -EINVAL;
>> + goto out;
>> + }
>> + dai->cpu_of_node = cpu_np;
>> + dai->platform_of_node = cpu_np;
>> +
>> + of_node_put(codec_np);
>> + of_node_put(cpu_np);
>> +
>> + dai->dai_fmt = snd_soc_of_parse_daifmt(np, "atmel,");
>> +
>> + ret = snd_soc_register_card(card);
>> + if (ret) {
>> + dev_err(&pdev->dev,
>> + "ASoC: Platform device allocation failed\n");
>> + goto out;
>> + }
>> +
>> + platform_set_drvdata(pdev, card);
>> +
>> + dev_info(&pdev->dev, "ASoC: at91sam9x5ek_init ok\n");
>> +
>> + return ret;
>> +
>> +out:
>> + atmel_ssc_put_audio(0);
>> + return ret;
>> +}
>> +
>> +static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
>> +{
>> + struct snd_soc_card *card = platform_get_drvdata(pdev);
>> +
>> + snd_soc_unregister_card(card);
>> + atmel_ssc_put_audio(0);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct of_device_id sam9x5_wm8731_of_match[] = {
>> + { .compatible = "atmel,sam9x5-audio-wm8731", },
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
>> +
>> +static struct platform_driver sam9x5_wm8731_driver = {
>> + .driver = {
>> + .name = DRV_NAME,
>> + .owner = THIS_MODULE,
>> + .of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
>> + },
>> + .probe = sam9x5_wm8731_driver_probe,
>> + .remove = sam9x5_wm8731_driver_remove,
>> +};
>> +module_platform_driver(sam9x5_wm8731_driver);
>> +
>> +/* Module information */
>> +MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre at atmel.com>");
>> +MODULE_AUTHOR("Richard Genoud <richard.genoud at gmail.com>");
>> +MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
>> +MODULE_LICENSE("GPL");
>> +MODULE_ALIAS("platform:" DRV_NAME);
>>
>
> Best Regards,
> Bo Shen
Thanks for reviewing !
Best regards
Richard.
--
for me, ck means con kolivas and not calvin klein... does it mean I'm a geek ?
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