261 lines
6.3 KiB
C
261 lines
6.3 KiB
C
/*
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* linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
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*
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* Author: Nicolas Pitre
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* Created: Dec 02, 2004
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* Copyright: MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/ac97_codec.h>
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#include <sound/initval.h>
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#include <sound/pxa2xx-lib.h>
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#include <mach/hardware.h>
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#include <mach/pxa-regs.h>
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#include <mach/audio.h>
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#include "pxa2xx-pcm.h"
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static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
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{
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if (!pxa2xx_ac97_try_cold_reset(ac97)) {
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pxa2xx_ac97_try_warm_reset(ac97);
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}
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pxa2xx_ac97_finish_reset(ac97);
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}
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static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
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.read = pxa2xx_ac97_read,
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.write = pxa2xx_ac97_write,
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.reset = pxa2xx_ac97_reset,
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};
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static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
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.name = "AC97 PCM out",
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.dev_addr = __PREG(PCDR),
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.drcmr = &DRCMR(12),
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.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
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DCMD_BURST32 | DCMD_WIDTH4,
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};
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static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
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.name = "AC97 PCM in",
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.dev_addr = __PREG(PCDR),
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.drcmr = &DRCMR(11),
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.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
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DCMD_BURST32 | DCMD_WIDTH4,
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};
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static struct snd_pcm *pxa2xx_ac97_pcm;
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static struct snd_ac97 *pxa2xx_ac97_ac97;
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static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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pxa2xx_audio_ops_t *platform_ops;
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int r;
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runtime->hw.channels_min = 2;
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runtime->hw.channels_max = 2;
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r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
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runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
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snd_pcm_limit_hw_rates(runtime);
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platform_ops = substream->pcm->card->dev->platform_data;
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if (platform_ops && platform_ops->startup)
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return platform_ops->startup(substream, platform_ops->priv);
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else
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return 0;
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}
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static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
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{
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pxa2xx_audio_ops_t *platform_ops;
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platform_ops = substream->pcm->card->dev->platform_data;
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if (platform_ops && platform_ops->shutdown)
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platform_ops->shutdown(substream, platform_ops->priv);
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}
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static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
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return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
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}
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static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
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.playback_params = &pxa2xx_ac97_pcm_out,
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.capture_params = &pxa2xx_ac97_pcm_in,
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.startup = pxa2xx_ac97_pcm_startup,
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.shutdown = pxa2xx_ac97_pcm_shutdown,
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.prepare = pxa2xx_ac97_pcm_prepare,
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};
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#ifdef CONFIG_PM
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static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state)
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{
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pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
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snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
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snd_pcm_suspend_all(pxa2xx_ac97_pcm);
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snd_ac97_suspend(pxa2xx_ac97_ac97);
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if (platform_ops && platform_ops->suspend)
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platform_ops->suspend(platform_ops->priv);
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return pxa2xx_ac97_hw_suspend();
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}
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static int pxa2xx_ac97_do_resume(struct snd_card *card)
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{
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pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
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int rc;
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rc = pxa2xx_ac97_hw_resume();
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if (rc)
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return rc;
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if (platform_ops && platform_ops->resume)
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platform_ops->resume(platform_ops->priv);
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snd_ac97_resume(pxa2xx_ac97_ac97);
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snd_power_change_state(card, SNDRV_CTL_POWER_D0);
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return 0;
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}
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static int pxa2xx_ac97_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct snd_card *card = platform_get_drvdata(dev);
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int ret = 0;
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if (card)
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ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND);
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return ret;
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}
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static int pxa2xx_ac97_resume(struct platform_device *dev)
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{
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struct snd_card *card = platform_get_drvdata(dev);
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int ret = 0;
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if (card)
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ret = pxa2xx_ac97_do_resume(card);
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return ret;
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}
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#else
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#define pxa2xx_ac97_suspend NULL
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#define pxa2xx_ac97_resume NULL
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#endif
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static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
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{
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struct snd_card *card;
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struct snd_ac97_bus *ac97_bus;
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struct snd_ac97_template ac97_template;
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int ret;
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ret = -ENOMEM;
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card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
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THIS_MODULE, 0);
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if (!card)
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goto err;
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card->dev = &dev->dev;
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strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
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ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
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if (ret)
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goto err;
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ret = pxa2xx_ac97_hw_probe(dev);
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if (ret)
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goto err;
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ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
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if (ret)
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goto err_remove;
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memset(&ac97_template, 0, sizeof(ac97_template));
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ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
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if (ret)
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goto err_remove;
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snprintf(card->shortname, sizeof(card->shortname),
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"%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
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snprintf(card->longname, sizeof(card->longname),
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"%s (%s)", dev->dev.driver->name, card->mixername);
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snd_card_set_dev(card, &dev->dev);
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ret = snd_card_register(card);
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if (ret == 0) {
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platform_set_drvdata(dev, card);
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return 0;
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}
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err_remove:
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pxa2xx_ac97_hw_remove(dev);
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err:
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if (card)
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snd_card_free(card);
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return ret;
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}
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static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
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{
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struct snd_card *card = platform_get_drvdata(dev);
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if (card) {
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snd_card_free(card);
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platform_set_drvdata(dev, NULL);
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pxa2xx_ac97_hw_remove(dev);
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}
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return 0;
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}
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static struct platform_driver pxa2xx_ac97_driver = {
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.probe = pxa2xx_ac97_probe,
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.remove = __devexit_p(pxa2xx_ac97_remove),
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.suspend = pxa2xx_ac97_suspend,
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.resume = pxa2xx_ac97_resume,
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.driver = {
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.name = "pxa2xx-ac97",
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.owner = THIS_MODULE,
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},
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};
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static int __init pxa2xx_ac97_init(void)
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{
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return platform_driver_register(&pxa2xx_ac97_driver);
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}
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static void __exit pxa2xx_ac97_exit(void)
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{
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platform_driver_unregister(&pxa2xx_ac97_driver);
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}
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module_init(pxa2xx_ac97_init);
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module_exit(pxa2xx_ac97_exit);
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MODULE_AUTHOR("Nicolas Pitre");
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MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pxa2xx-ac97");
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