sound/arm/pxa2xx-ac97.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
  *
  * Author:	Nicolas Pitre
  * Created:	Dec 02, 2004
  * Copyright:	MontaVista Software Inc.
  */

 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>

 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
 #include <sound/initval.h>
 #include <sound/pxa2xx-lib.h>
 #include <sound/dmaengine_pcm.h>

 #include <mach/regs-ac97.h>
 #include <mach/audio.h>

 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
 {
 	if (!pxa2xx_ac97_try_cold_reset())
 		pxa2xx_ac97_try_warm_reset();

 	pxa2xx_ac97_finish_reset();
 }

 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
 					      unsigned short reg)
 {
 	int ret;

 	ret = pxa2xx_ac97_read(ac97->num, reg);
 	if (ret < 0)
 		return 0;
 	else
 		return (unsigned short)(ret & 0xffff);
 }

 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
 				     unsigned short reg, unsigned short val)
 {
 	pxa2xx_ac97_write(ac97->num, reg, val);
 }

 static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
 	.read	= pxa2xx_ac97_legacy_read,
 	.write	= pxa2xx_ac97_legacy_write,
 	.reset	= pxa2xx_ac97_legacy_reset,
 };

 static struct snd_pcm *pxa2xx_ac97_pcm;
 static struct snd_ac97 *pxa2xx_ac97_ac97;

 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	pxa2xx_audio_ops_t *platform_ops;
 	int ret, i;

 	ret = pxa2xx_pcm_open(substream);
 	if (ret)
 		return ret;

 	runtime->hw.channels_min = 2;
 	runtime->hw.channels_max = 2;

 	i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 		AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
 	runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
 	snd_pcm_limit_hw_rates(runtime);

 	platform_ops = substream->pcm->card->dev->platform_data;
 	if (platform_ops && platform_ops->startup) {
 		ret = platform_ops->startup(substream, platform_ops->priv);
 		if (ret < 0)
 			pxa2xx_pcm_close(substream);
 	}

 	return ret;
 }

 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
 {
 	pxa2xx_audio_ops_t *platform_ops;

 	platform_ops = substream->pcm->card->dev->platform_data;
 	if (platform_ops && platform_ops->shutdown)
 		platform_ops->shutdown(substream, platform_ops->priv);

 	return 0;
 }

 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 		  AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
 	int ret;

 	ret = pxa2xx_pcm_prepare(substream);
 	if (ret < 0)
 		return ret;

 	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
 }

 #ifdef CONFIG_PM_SLEEP

 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
 {
 	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;

 	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
 	snd_ac97_suspend(pxa2xx_ac97_ac97);
 	if (platform_ops && platform_ops->suspend)
 		platform_ops->suspend(platform_ops->priv);

 	return pxa2xx_ac97_hw_suspend();
 }

 static int pxa2xx_ac97_do_resume(struct snd_card *card)
 {
 	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
 	int rc;

 	rc = pxa2xx_ac97_hw_resume();
 	if (rc)
 		return rc;

 	if (platform_ops && platform_ops->resume)
 		platform_ops->resume(platform_ops->priv);
 	snd_ac97_resume(pxa2xx_ac97_ac97);
 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);

 	return 0;
 }

 static int pxa2xx_ac97_suspend(struct device *dev)
 {
 	struct snd_card *card = dev_get_drvdata(dev);
 	int ret = 0;

 	if (card)
 		ret = pxa2xx_ac97_do_suspend(card);

 	return ret;
 }

 static int pxa2xx_ac97_resume(struct device *dev)
 {
 	struct snd_card *card = dev_get_drvdata(dev);
 	int ret = 0;

 	if (card)
 		ret = pxa2xx_ac97_do_resume(card);

 	return ret;
 }

 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
 #endif

 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
 	.open		= pxa2xx_ac97_pcm_open,
 	.close		= pxa2xx_ac97_pcm_close,
 	.hw_params	= pxa2xx_pcm_hw_params,
 	.hw_free	= pxa2xx_pcm_hw_free,
 	.prepare	= pxa2xx_ac97_pcm_prepare,
 	.trigger	= pxa2xx_pcm_trigger,
 	.pointer	= pxa2xx_pcm_pointer,
 	.mmap		= pxa2xx_pcm_mmap,
 };


 static int pxa2xx_ac97_pcm_new(struct snd_card *card)
 {
 	struct snd_pcm *pcm;
 	int stream, ret;

 	ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
 	if (ret)
 		goto out;

 	pcm->private_free = pxa2xx_pcm_free_dma_buffers;

 	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
 	if (ret)
 		goto out;

 	stream = SNDRV_PCM_STREAM_PLAYBACK;
 	snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
 	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
 	if (ret)
 		goto out;

 	stream = SNDRV_PCM_STREAM_CAPTURE;
 	snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
 	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
 	if (ret)
 		goto out;

 	pxa2xx_ac97_pcm = pcm;
 	ret = 0;

  out:
 	return ret;
 }

 static int pxa2xx_ac97_probe(struct platform_device *dev)
 {
 	struct snd_card *card;
 	struct snd_ac97_bus *ac97_bus;
 	struct snd_ac97_template ac97_template;
 	int ret;
 	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;

 	if (dev->id >= 0) {
 		dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
 		ret = -ENXIO;
 		goto err_dev;
 	}

 	ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
 			   THIS_MODULE, 0, &card);
 	if (ret < 0)
 		goto err;

 	strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));

 	ret = pxa2xx_ac97_pcm_new(card);
 	if (ret)
 		goto err;

 	ret = pxa2xx_ac97_hw_probe(dev);
 	if (ret)
 		goto err;

 	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
 	if (ret)
 		goto err_remove;
 	memset(&ac97_template, 0, sizeof(ac97_template));
 	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
 	if (ret)
 		goto err_remove;

 	snprintf(card->shortname, sizeof(card->shortname),
 		 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
 	snprintf(card->longname, sizeof(card->longname),
 		 "%s (%s)", dev->dev.driver->name, card->mixername);

 	if (pdata && pdata->codec_pdata[0])
 		snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
 	ret = snd_card_register(card);
 	if (ret == 0) {
 		platform_set_drvdata(dev, card);
 		return 0;
 	}

 err_remove:
 	pxa2xx_ac97_hw_remove(dev);
 err:
 	if (card)
 		snd_card_free(card);
 err_dev:
 	return ret;
 }

 static int pxa2xx_ac97_remove(struct platform_device *dev)
 {
 	struct snd_card *card = platform_get_drvdata(dev);

 	if (card) {
 		snd_card_free(card);
 		pxa2xx_ac97_hw_remove(dev);
 	}

 	return 0;
 }

 static struct platform_driver pxa2xx_ac97_driver = {
 	.probe		= pxa2xx_ac97_probe,
 	.remove		= pxa2xx_ac97_remove,
 	.driver		= {
 		.name	= "pxa2xx-ac97",
 #ifdef CONFIG_PM_SLEEP
 		.pm	= &pxa2xx_ac97_pm_ops,
 #endif
 	},
 };

 module_platform_driver(pxa2xx_ac97_driver);

 MODULE_AUTHOR("Nicolas Pitre");
 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:pxa2xx-ac97");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
	*
	* Author: Nicolas Pitre
	* Created: Dec 02, 2004
	* Copyright: MontaVista Software Inc.
	*/

	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/dmaengine.h>
	#include <linux/dma-mapping.h>

	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/ac97_codec.h>
	#include <sound/initval.h>
	#include <sound/pxa2xx-lib.h>
	#include <sound/dmaengine_pcm.h>

	#include <mach/regs-ac97.h>
	#include <mach/audio.h>

	static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
	{
	if (!pxa2xx_ac97_try_cold_reset())
	pxa2xx_ac97_try_warm_reset();

	pxa2xx_ac97_finish_reset();
	}

	static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
	unsigned short reg)
	{
	int ret;

	ret = pxa2xx_ac97_read(ac97->num, reg);
	if (ret < 0)
	return 0;
	else
	return (unsigned short)(ret & 0xffff);
	}

	static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
	unsigned short reg, unsigned short val)
	{
	pxa2xx_ac97_write(ac97->num, reg, val);
	}

	static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
	.read = pxa2xx_ac97_legacy_read,
	.write = pxa2xx_ac97_legacy_write,
	.reset = pxa2xx_ac97_legacy_reset,
	};

	static struct snd_pcm *pxa2xx_ac97_pcm;
	static struct snd_ac97 *pxa2xx_ac97_ac97;

	static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	pxa2xx_audio_ops_t *platform_ops;
	int ret, i;

	ret = pxa2xx_pcm_open(substream);
	if (ret)
	return ret;

	runtime->hw.channels_min = 2;
	runtime->hw.channels_max = 2;

	i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
	runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
	snd_pcm_limit_hw_rates(runtime);

	platform_ops = substream->pcm->card->dev->platform_data;
	if (platform_ops && platform_ops->startup) {
	ret = platform_ops->startup(substream, platform_ops->priv);
	if (ret < 0)
	pxa2xx_pcm_close(substream);
	}

	return ret;
	}

	static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
	{
	pxa2xx_audio_ops_t *platform_ops;

	platform_ops = substream->pcm->card->dev->platform_data;
	if (platform_ops && platform_ops->shutdown)
	platform_ops->shutdown(substream, platform_ops->priv);

	return 0;
	}

	static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
	int ret;

	ret = pxa2xx_pcm_prepare(substream);
	if (ret < 0)
	return ret;

	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
	}

	#ifdef CONFIG_PM_SLEEP

	static int pxa2xx_ac97_do_suspend(struct snd_card *card)
	{
	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;

	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
	snd_ac97_suspend(pxa2xx_ac97_ac97);
	if (platform_ops && platform_ops->suspend)
	platform_ops->suspend(platform_ops->priv);

	return pxa2xx_ac97_hw_suspend();
	}

	static int pxa2xx_ac97_do_resume(struct snd_card *card)
	{
	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
	int rc;

	rc = pxa2xx_ac97_hw_resume();
	if (rc)
	return rc;

	if (platform_ops && platform_ops->resume)
	platform_ops->resume(platform_ops->priv);
	snd_ac97_resume(pxa2xx_ac97_ac97);
	snd_power_change_state(card, SNDRV_CTL_POWER_D0);

	return 0;
	}

	static int pxa2xx_ac97_suspend(struct device *dev)
	{
	struct snd_card *card = dev_get_drvdata(dev);
	int ret = 0;

	if (card)
	ret = pxa2xx_ac97_do_suspend(card);

	return ret;
	}

	static int pxa2xx_ac97_resume(struct device *dev)
	{
	struct snd_card *card = dev_get_drvdata(dev);
	int ret = 0;

	if (card)
	ret = pxa2xx_ac97_do_resume(card);

	return ret;
	}

	static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
	#endif

	static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
	.open = pxa2xx_ac97_pcm_open,
	.close = pxa2xx_ac97_pcm_close,
	.hw_params = pxa2xx_pcm_hw_params,
	.hw_free = pxa2xx_pcm_hw_free,
	.prepare = pxa2xx_ac97_pcm_prepare,
	.trigger = pxa2xx_pcm_trigger,
	.pointer = pxa2xx_pcm_pointer,
	.mmap = pxa2xx_pcm_mmap,
	};


	static int pxa2xx_ac97_pcm_new(struct snd_card *card)
	{
	struct snd_pcm *pcm;
	int stream, ret;

	ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
	if (ret)
	goto out;

	pcm->private_free = pxa2xx_pcm_free_dma_buffers;

	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
	if (ret)
	goto out;

	stream = SNDRV_PCM_STREAM_PLAYBACK;
	snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
	if (ret)
	goto out;

	stream = SNDRV_PCM_STREAM_CAPTURE;
	snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
	if (ret)
	goto out;

	pxa2xx_ac97_pcm = pcm;
	ret = 0;

	out:
	return ret;
	}

	static int pxa2xx_ac97_probe(struct platform_device *dev)
	{
	struct snd_card *card;
	struct snd_ac97_bus *ac97_bus;
	struct snd_ac97_template ac97_template;
	int ret;
	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;

	if (dev->id >= 0) {
	dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
	ret = -ENXIO;
	goto err_dev;
	}

	ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
	THIS_MODULE, 0, &card);
	if (ret < 0)
	goto err;

	strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));

	ret = pxa2xx_ac97_pcm_new(card);
	if (ret)
	goto err;

	ret = pxa2xx_ac97_hw_probe(dev);
	if (ret)
	goto err;

	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
	if (ret)
	goto err_remove;
	memset(&ac97_template, 0, sizeof(ac97_template));
	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
	if (ret)
	goto err_remove;

	snprintf(card->shortname, sizeof(card->shortname),
	"%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
	snprintf(card->longname, sizeof(card->longname),
	"%s (%s)", dev->dev.driver->name, card->mixername);

	if (pdata && pdata->codec_pdata[0])
	snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
	ret = snd_card_register(card);
	if (ret == 0) {
	platform_set_drvdata(dev, card);
	return 0;
	}

	err_remove:
	pxa2xx_ac97_hw_remove(dev);
	err:
	if (card)
	snd_card_free(card);
	err_dev:
	return ret;
	}

	static int pxa2xx_ac97_remove(struct platform_device *dev)
	{
	struct snd_card *card = platform_get_drvdata(dev);

	if (card) {
	snd_card_free(card);
	pxa2xx_ac97_hw_remove(dev);
	}

	return 0;
	}

	static struct platform_driver pxa2xx_ac97_driver = {
	.probe = pxa2xx_ac97_probe,
	.remove = pxa2xx_ac97_remove,
	.driver = {
	.name = "pxa2xx-ac97",
	#ifdef CONFIG_PM_SLEEP
	.pm = &pxa2xx_ac97_pm_ops,
	#endif
	},
	};

	module_platform_driver(pxa2xx_ac97_driver);

	MODULE_AUTHOR("Nicolas Pitre");
	MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:pxa2xx-ac97");