[mirror_ubuntu-bionic-kernel.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 <linux/dma/pxa-dma.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_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)
{
	int __always_unused ret;

	ret = pxa2xx_ac97_write(ac97->num, reg, val);
}

static 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 pxad_param pxa2xx_ac97_pcm_out_req = {
	.prio = PXAD_PRIO_LOWEST,
	.drcmr = 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 struct pxad_param pxa2xx_ac97_pcm_in_req = {
	.prio = PXAD_PRIO_LOWEST,
	.drcmr = 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",
#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	#include <linux/dma/pxa-dma.h>
	19
	20	#include <sound/core.h>
	21	#include <sound/pcm.h>
	22	#include <sound/ac97_codec.h>
	23	#include <sound/initval.h>
	24	#include <sound/pxa2xx-lib.h>
	25	#include <sound/dmaengine_pcm.h>
	26
	27	#include <mach/regs-ac97.h>
	28	#include <mach/audio.h>
	29
	30	#include "pxa2xx-pcm.h"
	31
	32	static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
	33	{
	34	if (!pxa2xx_ac97_try_cold_reset())
	35	pxa2xx_ac97_try_warm_reset();
	36
	37	pxa2xx_ac97_finish_reset();
	38	}
	39
	40	static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
	41	unsigned short reg)
	42	{
	43	int ret;
	44
	45	ret = pxa2xx_ac97_read(ac97->num, reg);
	46	if (ret < 0)
	47	return 0;
	48	else
	49	return (unsigned short)(ret & 0xffff);
	50	}
	51
	52	static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
	53	unsigned short reg, unsigned short val)
	54	{
	55	int __always_unused ret;
	56
	57	ret = pxa2xx_ac97_write(ac97->num, reg, val);
	58	}
	59
	60	static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
	61	.read = pxa2xx_ac97_legacy_read,
	62	.write = pxa2xx_ac97_legacy_write,
	63	.reset = pxa2xx_ac97_legacy_reset,
	64	};
	65
	66	static struct pxad_param pxa2xx_ac97_pcm_out_req = {
	67	.prio = PXAD_PRIO_LOWEST,
	68	.drcmr = 12,
	69	};
	70
	71	static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
	72	.addr = __PREG(PCDR),
	73	.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
	74	.maxburst = 32,
	75	.filter_data = &pxa2xx_ac97_pcm_out_req,
	76	};
	77
	78	static struct pxad_param pxa2xx_ac97_pcm_in_req = {
	79	.prio = PXAD_PRIO_LOWEST,
	80	.drcmr = 11,
	81	};
	82
	83	static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
	84	.addr = __PREG(PCDR),
	85	.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
	86	.maxburst = 32,
	87	.filter_data = &pxa2xx_ac97_pcm_in_req,
	88	};
	89
	90	static struct snd_pcm *pxa2xx_ac97_pcm;
	91	static struct snd_ac97 *pxa2xx_ac97_ac97;
	92
	93	static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
	94	{
	95	struct snd_pcm_runtime *runtime = substream->runtime;
	96	pxa2xx_audio_ops_t *platform_ops;
	97	int r;
	98
	99	runtime->hw.channels_min = 2;
	100	runtime->hw.channels_max = 2;
	101
	102	r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	103	AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
	104	runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
	105	snd_pcm_limit_hw_rates(runtime);
	106
	107	platform_ops = substream->pcm->card->dev->platform_data;
	108	if (platform_ops && platform_ops->startup)
	109	return platform_ops->startup(substream, platform_ops->priv);
	110	else
	111	return 0;
	112	}
	113
	114	static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
	115	{
	116	pxa2xx_audio_ops_t *platform_ops;
	117
	118	platform_ops = substream->pcm->card->dev->platform_data;
	119	if (platform_ops && platform_ops->shutdown)
	120	platform_ops->shutdown(substream, platform_ops->priv);
	121	}
	122
	123	static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
	124	{
	125	struct snd_pcm_runtime *runtime = substream->runtime;
	126	int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
	127	AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
	128	return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
	129	}
	130
	131	static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
	132	.playback_params = &pxa2xx_ac97_pcm_out,
	133	.capture_params = &pxa2xx_ac97_pcm_in,
	134	.startup = pxa2xx_ac97_pcm_startup,
	135	.shutdown = pxa2xx_ac97_pcm_shutdown,
	136	.prepare = pxa2xx_ac97_pcm_prepare,
	137	};
	138
	139	#ifdef CONFIG_PM_SLEEP
	140
	141	static int pxa2xx_ac97_do_suspend(struct snd_card *card)
	142	{
	143	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
	144
	145	snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
	146	snd_pcm_suspend_all(pxa2xx_ac97_pcm);
	147	snd_ac97_suspend(pxa2xx_ac97_ac97);
	148	if (platform_ops && platform_ops->suspend)
	149	platform_ops->suspend(platform_ops->priv);
	150
	151	return pxa2xx_ac97_hw_suspend();
	152	}
	153
	154	static int pxa2xx_ac97_do_resume(struct snd_card *card)
	155	{
	156	pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
	157	int rc;
	158
	159	rc = pxa2xx_ac97_hw_resume();
	160	if (rc)
	161	return rc;
	162
	163	if (platform_ops && platform_ops->resume)
	164	platform_ops->resume(platform_ops->priv);
	165	snd_ac97_resume(pxa2xx_ac97_ac97);
	166	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	167
	168	return 0;
	169	}
	170
	171	static int pxa2xx_ac97_suspend(struct device *dev)
	172	{
	173	struct snd_card *card = dev_get_drvdata(dev);
	174	int ret = 0;
	175
	176	if (card)
	177	ret = pxa2xx_ac97_do_suspend(card);
	178
	179	return ret;
	180	}
	181
	182	static int pxa2xx_ac97_resume(struct device *dev)
	183	{
	184	struct snd_card *card = dev_get_drvdata(dev);
	185	int ret = 0;
	186
	187	if (card)
	188	ret = pxa2xx_ac97_do_resume(card);
	189
	190	return ret;
	191	}
	192
	193	static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
	194	#endif
	195
	196	static int pxa2xx_ac97_probe(struct platform_device *dev)
	197	{
	198	struct snd_card *card;
	199	struct snd_ac97_bus *ac97_bus;
	200	struct snd_ac97_template ac97_template;
	201	int ret;
	202	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
	203
	204	if (dev->id >= 0) {
	205	dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
	206	ret = -ENXIO;
	207	goto err_dev;
	208	}
	209
	210	ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
	211	THIS_MODULE, 0, &card);
	212	if (ret < 0)
	213	goto err;
	214
	215	strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
	216
	217	ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
	218	if (ret)
	219	goto err;
	220
	221	ret = pxa2xx_ac97_hw_probe(dev);
	222	if (ret)
	223	goto err;
	224
	225	ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
	226	if (ret)
	227	goto err_remove;
	228	memset(&ac97_template, 0, sizeof(ac97_template));
	229	ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
	230	if (ret)
	231	goto err_remove;
	232
	233	snprintf(card->shortname, sizeof(card->shortname),
	234	"%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
	235	snprintf(card->longname, sizeof(card->longname),
	236	"%s (%s)", dev->dev.driver->name, card->mixername);
	237
	238	if (pdata && pdata->codec_pdata[0])
	239	snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
	240	ret = snd_card_register(card);
	241	if (ret == 0) {
	242	platform_set_drvdata(dev, card);
	243	return 0;
	244	}
	245
	246	err_remove:
	247	pxa2xx_ac97_hw_remove(dev);
	248	err:
	249	if (card)
	250	snd_card_free(card);
	251	err_dev:
	252	return ret;
	253	}
	254
	255	static int pxa2xx_ac97_remove(struct platform_device *dev)
	256	{
	257	struct snd_card *card = platform_get_drvdata(dev);
	258
	259	if (card) {
	260	snd_card_free(card);
	261	pxa2xx_ac97_hw_remove(dev);
	262	}
	263
	264	return 0;
	265	}
	266
	267	static struct platform_driver pxa2xx_ac97_driver = {
	268	.probe = pxa2xx_ac97_probe,
	269	.remove = pxa2xx_ac97_remove,
	270	.driver = {
	271	.name = "pxa2xx-ac97",
	272	#ifdef CONFIG_PM_SLEEP
	273	.pm = &pxa2xx_ac97_pm_ops,
	274	#endif
	275	},
	276	};
	277
	278	module_platform_driver(pxa2xx_ac97_driver);
	279
	280	MODULE_AUTHOR("Nicolas Pitre");
	281	MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
	282	MODULE_LICENSE("GPL");
	283	MODULE_ALIAS("platform:pxa2xx-ac97");