[deliverable/linux.git] / sound / arm / pxa2xx-ac97.c

/*
 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
 *
 * Author:	Nicolas Pitre
 * Created:	Dec 02, 2004
 * Copyright:	MontaVista Software Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

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

#include "pxa2xx-pcm.h"

static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
{
	if (!pxa2xx_ac97_try_cold_reset(ac97)) {
		pxa2xx_ac97_try_warm_reset(ac97);
	}

	pxa2xx_ac97_finish_reset(ac97);
}

static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
	.read	= pxa2xx_ac97_read,
	.write	= pxa2xx_ac97_write,
	.reset	= pxa2xx_ac97_reset,
};

static unsigned long pxa2xx_ac97_pcm_out_req = 12;
static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
	.addr		= __PREG(PCDR),
	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
	.maxburst	= 32,
	.filter_data	= &pxa2xx_ac97_pcm_out_req,
};

static unsigned long pxa2xx_ac97_pcm_in_req = 11;
static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
	.addr		= __PREG(PCDR),
	.addr_width	= DMA_SLAVE_BUSWIDTH_4_BYTES,
	.maxburst	= 32,
	.filter_data	= &pxa2xx_ac97_pcm_in_req,
};

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

static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	pxa2xx_audio_ops_t *platform_ops;
	int r;

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

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

       	platform_ops = substream->pcm->card->dev->platform_data;
	if (platform_ops && platform_ops->startup)
		return platform_ops->startup(substream, platform_ops->priv);
	else
		return 0;
}

static void pxa2xx_ac97_pcm_shutdown(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);
}

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

static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
	.playback_params	= &pxa2xx_ac97_pcm_out,
	.capture_params		= &pxa2xx_ac97_pcm_in,
	.startup		= pxa2xx_ac97_pcm_startup,
	.shutdown		= pxa2xx_ac97_pcm_shutdown,
	.prepare		= pxa2xx_ac97_pcm_prepare,
};

#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_pcm_suspend_all(pxa2xx_ac97_pcm);
	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 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;

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

	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
	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",
		.owner	= THIS_MODULE,
#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");
Commit	Line	Data
	1	/*
	2	* linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
	3	*
	4	* Author: Nicolas Pitre
	5	* Created: Dec 02, 2004
	6	* Copyright: MontaVista Software Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/init.h>
	14	#include <linux/io.h>
	15	#include <linux/module.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/dmaengine.h>
	18
	19	#include <sound/core.h>
	20	#include <sound/pcm.h>
	21	#include <sound/ac97_codec.h>
	22	#include <sound/initval.h>
	23	#include <sound/pxa2xx-lib.h>
	24	#include <sound/dmaengine_pcm.h>
	25
	26	#include <mach/regs-ac97.h>
	27	#include <mach/audio.h>
	28
	29	#include "pxa2xx-pcm.h"
	30
	31	static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
	32	{
	33	if (!pxa2xx_ac97_try_cold_reset(ac97)) {
	34	pxa2xx_ac97_try_warm_reset(ac97);
	35	}
	36
	37	pxa2xx_ac97_finish_reset(ac97);
	38	}
	39
	40	static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
	41	.read = pxa2xx_ac97_read,
	42	.write = pxa2xx_ac97_write,
	43	.reset = pxa2xx_ac97_reset,
	44	};
	45
	46	static unsigned long pxa2xx_ac97_pcm_out_req = 12;
	47	static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
	48	.addr = __PREG(PCDR),
	49	.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
	50	.maxburst = 32,
	51	.filter_data = &pxa2xx_ac97_pcm_out_req,
	52	};
	53
	54	static unsigned long pxa2xx_ac97_pcm_in_req = 11;
	55	static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
	56	.addr = __PREG(PCDR),
	57	.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
	58	.maxburst = 32,
	59	.filter_data = &pxa2xx_ac97_pcm_in_req,
	60	};
	61
	62	static struct snd_pcm *pxa2xx_ac97_pcm;
	63	static struct snd_ac97 *pxa2xx_ac97_ac97;
	64
	65	static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
	66	{
	67	struct snd_pcm_runtime *runtime = substream->runtime;
	68	pxa2xx_audio_ops_t *platform_ops;
	69	int r;
	70
	71	runtime->hw.channels_min = 2;
	72	runtime->hw.channels_max = 2;
	73
	74	r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	75	AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
	76	runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
	77	snd_pcm_limit_hw_rates(runtime);
	78
	79	platform_ops = substream->pcm->card->dev->platform_data;
	80	if (platform_ops && platform_ops->startup)
	81	return platform_ops->startup(substream, platform_ops->priv);
	82	else
	83	return 0;
	84	}
	85
	86	static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
	87	{
	88	pxa2xx_audio_ops_t *platform_ops;
	89
	90	platform_ops = substream->pcm->card->dev->platform_data;
	91	if (platform_ops && platform_ops->shutdown)
	92	platform_ops->shutdown(substream, platform_ops->priv);
	93	}
	94
	95	static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
	96	{
	97	struct snd_pcm_runtime *runtime = substream->runtime;
	98	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	99	AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
	100	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
	101	}
	102
	103	static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
	104	.playback_params = &pxa2xx_ac97_pcm_out,
	105	.capture_params = &pxa2xx_ac97_pcm_in,
	106	.startup = pxa2xx_ac97_pcm_startup,
	107	.shutdown = pxa2xx_ac97_pcm_shutdown,
	108	.prepare = pxa2xx_ac97_pcm_prepare,
	109	};
	110
	111	#ifdef CONFIG_PM_SLEEP
	112
	113	static int pxa2xx_ac97_do_suspend(struct snd_card *card)
	114	{
	115	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
	116
	117	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
	118	snd_pcm_suspend_all(pxa2xx_ac97_pcm);
	119	snd_ac97_suspend(pxa2xx_ac97_ac97);
	120	if (platform_ops && platform_ops->suspend)
	121	platform_ops->suspend(platform_ops->priv);
	122
	123	return pxa2xx_ac97_hw_suspend();
	124	}
	125
	126	static int pxa2xx_ac97_do_resume(struct snd_card *card)
	127	{
	128	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
	129	int rc;
	130
	131	rc = pxa2xx_ac97_hw_resume();
	132	if (rc)
	133	return rc;
	134
	135	if (platform_ops && platform_ops->resume)
	136	platform_ops->resume(platform_ops->priv);
	137	snd_ac97_resume(pxa2xx_ac97_ac97);
	138	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	139
	140	return 0;
	141	}
	142
	143	static int pxa2xx_ac97_suspend(struct device *dev)
	144	{
	145	struct snd_card *card = dev_get_drvdata(dev);
	146	int ret = 0;
	147
	148	if (card)
	149	ret = pxa2xx_ac97_do_suspend(card);
	150
	151	return ret;
	152	}
	153
	154	static int pxa2xx_ac97_resume(struct device *dev)
	155	{
	156	struct snd_card *card = dev_get_drvdata(dev);
	157	int ret = 0;
	158
	159	if (card)
	160	ret = pxa2xx_ac97_do_resume(card);
	161
	162	return ret;
	163	}
	164
	165	static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
	166	#endif
	167
	168	static int pxa2xx_ac97_probe(struct platform_device *dev)
	169	{
	170	struct snd_card *card;
	171	struct snd_ac97_bus *ac97_bus;
	172	struct snd_ac97_template ac97_template;
	173	int ret;
	174	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
	175
	176	if (dev->id >= 0) {
	177	dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
	178	ret = -ENXIO;
	179	goto err_dev;
	180	}
	181
	182	ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
	183	THIS_MODULE, 0, &card);
	184	if (ret < 0)
	185	goto err;
	186
	187	strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
	188
	189	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
	190	if (ret)
	191	goto err;
	192
	193	ret = pxa2xx_ac97_hw_probe(dev);
	194	if (ret)
	195	goto err;
	196
	197	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
	198	if (ret)
	199	goto err_remove;
	200	memset(&ac97_template, 0, sizeof(ac97_template));
	201	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
	202	if (ret)
	203	goto err_remove;
	204
	205	snprintf(card->shortname, sizeof(card->shortname),
	206	"%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
	207	snprintf(card->longname, sizeof(card->longname),
	208	"%s (%s)", dev->dev.driver->name, card->mixername);
	209
	210	if (pdata && pdata->codec_pdata[0])
	211	snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
	212	ret = snd_card_register(card);
	213	if (ret == 0) {
	214	platform_set_drvdata(dev, card);
	215	return 0;
	216	}
	217
	218	err_remove:
	219	pxa2xx_ac97_hw_remove(dev);
	220	err:
	221	if (card)
	222	snd_card_free(card);
	223	err_dev:
	224	return ret;
	225	}
	226
	227	static int pxa2xx_ac97_remove(struct platform_device *dev)
	228	{
	229	struct snd_card *card = platform_get_drvdata(dev);
	230
	231	if (card) {
	232	snd_card_free(card);
	233	pxa2xx_ac97_hw_remove(dev);
	234	}
	235
	236	return 0;
	237	}
	238
	239	static struct platform_driver pxa2xx_ac97_driver = {
	240	.probe = pxa2xx_ac97_probe,
	241	.remove = pxa2xx_ac97_remove,
	242	.driver = {
	243	.name = "pxa2xx-ac97",
	244	.owner = THIS_MODULE,
	245	#ifdef CONFIG_PM_SLEEP
	246	.pm = &pxa2xx_ac97_pm_ops,
	247	#endif
	248	},
	249	};
	250
	251	module_platform_driver(pxa2xx_ac97_driver);
	252
	253	MODULE_AUTHOR("Nicolas Pitre");
	254	MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
	255	MODULE_LICENSE("GPL");
	256	MODULE_ALIAS("platform:pxa2xx-ac97");