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Release 4.8 sound/arm/pxa2xx-ac97.c

Directory: sound/arm
/*
 * 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_reset(struct snd_ac97 *ac97) { if (!pxa2xx_ac97_try_cold_reset(ac97)) { pxa2xx_ac97_try_warm_reset(ac97); } pxa2xx_ac97_finish_reset(ac97); }

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static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { .read = pxa2xx_ac97_read, .write = pxa2xx_ac97_write, .reset = pxa2xx_ac97_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; }

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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); }

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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); }

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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(); }

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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; }

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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; }

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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; }

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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; }

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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; }

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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");

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Directory: sound/arm
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