308 lines
7.5 KiB
C
308 lines
7.5 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/pxa-dma.h>
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#include <sound/core.h>
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#include <sound/ac97_codec.h>
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#include <sound/soc.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/hardware.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_warm_reset(struct snd_ac97 *ac97)
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{
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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 void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
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{
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pxa2xx_ac97_try_cold_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 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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.warm_reset = pxa2xx_ac97_warm_reset,
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.reset = pxa2xx_ac97_cold_reset,
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};
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static struct pxad_param pxa2xx_ac97_pcm_stereo_in_req = {
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.prio = PXAD_PRIO_LOWEST,
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.drcmr = 11,
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};
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static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
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.addr = __PREG(PCDR),
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.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
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.maxburst = 32,
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.filter_data = &pxa2xx_ac97_pcm_stereo_in_req,
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};
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static struct pxad_param pxa2xx_ac97_pcm_stereo_out_req = {
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.prio = PXAD_PRIO_LOWEST,
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.drcmr = 12,
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};
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static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
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.addr = __PREG(PCDR),
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.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
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.maxburst = 32,
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.filter_data = &pxa2xx_ac97_pcm_stereo_out_req,
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};
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static struct pxad_param pxa2xx_ac97_pcm_aux_mono_out_req = {
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.prio = PXAD_PRIO_LOWEST,
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.drcmr = 10,
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};
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static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
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.addr = __PREG(MODR),
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.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
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.maxburst = 16,
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.filter_data = &pxa2xx_ac97_pcm_aux_mono_out_req,
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};
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static struct pxad_param pxa2xx_ac97_pcm_aux_mono_in_req = {
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.prio = PXAD_PRIO_LOWEST,
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.drcmr = 9,
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};
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static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
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.addr = __PREG(MODR),
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.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
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.maxburst = 16,
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.filter_data = &pxa2xx_ac97_pcm_aux_mono_in_req,
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};
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static struct pxad_param pxa2xx_ac97_pcm_aux_mic_mono_req = {
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.prio = PXAD_PRIO_LOWEST,
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.drcmr = 8,
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};
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static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
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.addr = __PREG(MCDR),
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.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
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.maxburst = 16,
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.filter_data = &pxa2xx_ac97_pcm_aux_mic_mono_req,
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};
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static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *cpu_dai)
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{
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struct snd_dmaengine_dai_dma_data *dma_data;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dma_data = &pxa2xx_ac97_pcm_stereo_out;
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else
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dma_data = &pxa2xx_ac97_pcm_stereo_in;
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snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
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return 0;
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}
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static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *cpu_dai)
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{
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struct snd_dmaengine_dai_dma_data *dma_data;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
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else
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dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
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snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
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return 0;
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}
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static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *cpu_dai)
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{
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return -ENODEV;
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snd_soc_dai_set_dma_data(cpu_dai, substream,
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&pxa2xx_ac97_pcm_mic_mono_in);
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return 0;
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}
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#define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
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SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000)
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static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
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.startup = pxa2xx_ac97_hifi_startup,
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};
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static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
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.startup = pxa2xx_ac97_aux_startup,
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};
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static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
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.startup = pxa2xx_ac97_mic_startup,
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};
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/*
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* There is only 1 physical AC97 interface for pxa2xx, but it
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* has extra fifo's that can be used for aux DACs and ADCs.
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*/
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static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
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{
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.name = "pxa2xx-ac97",
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.bus_control = true,
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.playback = {
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.stream_name = "AC97 Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = PXA2XX_AC97_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.capture = {
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.stream_name = "AC97 Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = PXA2XX_AC97_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.ops = &pxa_ac97_hifi_dai_ops,
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},
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{
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.name = "pxa2xx-ac97-aux",
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.bus_control = true,
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.playback = {
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.stream_name = "AC97 Aux Playback",
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.channels_min = 1,
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.channels_max = 1,
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.rates = PXA2XX_AC97_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.capture = {
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.stream_name = "AC97 Aux Capture",
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.channels_min = 1,
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.channels_max = 1,
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.rates = PXA2XX_AC97_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.ops = &pxa_ac97_aux_dai_ops,
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},
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{
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.name = "pxa2xx-ac97-mic",
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.bus_control = true,
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.capture = {
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.stream_name = "AC97 Mic Capture",
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.channels_min = 1,
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.channels_max = 1,
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.rates = PXA2XX_AC97_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.ops = &pxa_ac97_mic_dai_ops,
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},
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};
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static const struct snd_soc_component_driver pxa_ac97_component = {
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.name = "pxa-ac97",
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};
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static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
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{
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int ret;
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if (pdev->id != -1) {
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dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
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return -ENXIO;
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}
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ret = pxa2xx_ac97_hw_probe(pdev);
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if (ret) {
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dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
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return ret;
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}
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ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
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if (ret != 0)
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return ret;
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/* Punt most of the init to the SoC probe; we may need the machine
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* driver to do interesting things with the clocking to get us up
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* and running.
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*/
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return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
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pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
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}
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static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_component(&pdev->dev);
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snd_soc_set_ac97_ops(NULL);
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pxa2xx_ac97_hw_remove(pdev);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int pxa2xx_ac97_dev_suspend(struct device *dev)
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{
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return pxa2xx_ac97_hw_suspend();
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}
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static int pxa2xx_ac97_dev_resume(struct device *dev)
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{
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return pxa2xx_ac97_hw_resume();
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}
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static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
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pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
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#endif
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static struct platform_driver pxa2xx_ac97_driver = {
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.probe = pxa2xx_ac97_dev_probe,
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.remove = pxa2xx_ac97_dev_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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