312 lines
7.1 KiB
C
312 lines
7.1 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/io.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/dmaengine.h>
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#include <linux/dma-mapping.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 <sound/dmaengine_pcm.h>
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#include <mach/regs-ac97.h>
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#include <mach/audio.h>
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static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
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{
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if (!pxa2xx_ac97_try_cold_reset())
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pxa2xx_ac97_try_warm_reset();
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pxa2xx_ac97_finish_reset();
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}
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static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
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unsigned short reg)
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{
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int ret;
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ret = pxa2xx_ac97_read(ac97->num, reg);
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if (ret < 0)
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return 0;
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else
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return (unsigned short)(ret & 0xffff);
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}
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static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
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unsigned short reg, unsigned short val)
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{
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int __always_unused ret;
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ret = pxa2xx_ac97_write(ac97->num, reg, val);
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}
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static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
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.read = pxa2xx_ac97_legacy_read,
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.write = pxa2xx_ac97_legacy_write,
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.reset = pxa2xx_ac97_legacy_reset,
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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_open(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 ret, i;
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ret = pxa2xx_pcm_open(substream);
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if (ret)
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return ret;
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runtime->hw.channels_min = 2;
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runtime->hw.channels_max = 2;
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i = (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[i];
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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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ret = platform_ops->startup(substream, platform_ops->priv);
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if (ret < 0)
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pxa2xx_pcm_close(substream);
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}
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return ret;
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}
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static int pxa2xx_ac97_pcm_close(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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return 0;
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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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int ret;
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ret = pxa2xx_pcm_prepare(substream);
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if (ret < 0)
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return ret;
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return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
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}
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#ifdef CONFIG_PM_SLEEP
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static int pxa2xx_ac97_do_suspend(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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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 device *dev)
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{
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struct snd_card *card = dev_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);
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return ret;
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}
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static int pxa2xx_ac97_resume(struct device *dev)
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{
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struct snd_card *card = dev_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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static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
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#endif
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static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
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.open = pxa2xx_ac97_pcm_open,
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.close = pxa2xx_ac97_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = pxa2xx_pcm_hw_params,
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.hw_free = pxa2xx_pcm_hw_free,
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.prepare = pxa2xx_ac97_pcm_prepare,
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.trigger = pxa2xx_pcm_trigger,
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.pointer = pxa2xx_pcm_pointer,
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.mmap = pxa2xx_pcm_mmap,
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};
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static int pxa2xx_ac97_pcm_new(struct snd_card *card)
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{
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struct snd_pcm *pcm;
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int stream, ret;
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ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
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if (ret)
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goto out;
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pcm->private_free = pxa2xx_pcm_free_dma_buffers;
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ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
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if (ret)
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goto out;
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stream = SNDRV_PCM_STREAM_PLAYBACK;
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snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
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ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
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if (ret)
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goto out;
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stream = SNDRV_PCM_STREAM_CAPTURE;
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snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
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ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
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if (ret)
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goto out;
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pxa2xx_ac97_pcm = pcm;
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ret = 0;
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out:
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return ret;
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}
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static int 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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pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
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if (dev->id >= 0) {
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dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
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ret = -ENXIO;
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goto err_dev;
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}
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ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
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THIS_MODULE, 0, &card);
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if (ret < 0)
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goto err;
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strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
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ret = pxa2xx_ac97_pcm_new(card);
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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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if (pdata && pdata->codec_pdata[0])
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snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
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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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err_dev:
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return ret;
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}
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static int 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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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 = pxa2xx_ac97_remove,
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.driver = {
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.name = "pxa2xx-ac97",
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#ifdef CONFIG_PM_SLEEP
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.pm = &pxa2xx_ac97_pm_ops,
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#endif
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},
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};
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module_platform_driver(pxa2xx_ac97_driver);
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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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