2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
4 * Author: Nicolas Pitre
5 * Created: Dec 02, 2004
6 * Copyright: MontaVista Software Inc.
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.
13 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/platform_device.h>
17 #include <linux/dmaengine.h>
18 #include <linux/dma/pxa-dma.h>
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>
27 #include <mach/regs-ac97.h>
28 #include <mach/audio.h>
30 #include "pxa2xx-pcm.h"
32 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
34 if (!pxa2xx_ac97_try_cold_reset())
35 pxa2xx_ac97_try_warm_reset();
37 pxa2xx_ac97_finish_reset();
40 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
45 ret = pxa2xx_ac97_read(ac97->num, reg);
49 return (unsigned short)(ret & 0xffff);
52 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
53 unsigned short reg, unsigned short val)
55 int __always_unused ret;
57 ret = pxa2xx_ac97_write(ac97->num, reg, val);
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,
66 static struct pxad_param pxa2xx_ac97_pcm_out_req = {
67 .prio = PXAD_PRIO_LOWEST,
71 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
73 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
75 .filter_data = &pxa2xx_ac97_pcm_out_req,
78 static struct pxad_param pxa2xx_ac97_pcm_in_req = {
79 .prio = PXAD_PRIO_LOWEST,
83 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
85 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
87 .filter_data = &pxa2xx_ac97_pcm_in_req,
90 static struct snd_pcm *pxa2xx_ac97_pcm;
91 static struct snd_ac97 *pxa2xx_ac97_ac97;
93 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
95 struct snd_pcm_runtime *runtime = substream->runtime;
96 pxa2xx_audio_ops_t *platform_ops;
99 runtime->hw.channels_min = 2;
100 runtime->hw.channels_max = 2;
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);
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);
114 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
116 pxa2xx_audio_ops_t *platform_ops;
118 platform_ops = substream->pcm->card->dev->platform_data;
119 if (platform_ops && platform_ops->shutdown)
120 platform_ops->shutdown(substream, platform_ops->priv);
123 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
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);
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,
139 #ifdef CONFIG_PM_SLEEP
141 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
143 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
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);
151 return pxa2xx_ac97_hw_suspend();
154 static int pxa2xx_ac97_do_resume(struct snd_card *card)
156 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
159 rc = pxa2xx_ac97_hw_resume();
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);
171 static int pxa2xx_ac97_suspend(struct device *dev)
173 struct snd_card *card = dev_get_drvdata(dev);
177 ret = pxa2xx_ac97_do_suspend(card);
182 static int pxa2xx_ac97_resume(struct device *dev)
184 struct snd_card *card = dev_get_drvdata(dev);
188 ret = pxa2xx_ac97_do_resume(card);
193 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
196 static int pxa2xx_ac97_probe(struct platform_device *dev)
198 struct snd_card *card;
199 struct snd_ac97_bus *ac97_bus;
200 struct snd_ac97_template ac97_template;
202 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
205 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
210 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
211 THIS_MODULE, 0, &card);
215 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
217 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
221 ret = pxa2xx_ac97_hw_probe(dev);
225 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
228 memset(&ac97_template, 0, sizeof(ac97_template));
229 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
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);
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);
242 platform_set_drvdata(dev, card);
247 pxa2xx_ac97_hw_remove(dev);
255 static int pxa2xx_ac97_remove(struct platform_device *dev)
257 struct snd_card *card = platform_get_drvdata(dev);
261 pxa2xx_ac97_hw_remove(dev);
267 static struct platform_driver pxa2xx_ac97_driver = {
268 .probe = pxa2xx_ac97_probe,
269 .remove = pxa2xx_ac97_remove,
271 .name = "pxa2xx-ac97",
272 #ifdef CONFIG_PM_SLEEP
273 .pm = &pxa2xx_ac97_pm_ops,
278 module_platform_driver(pxa2xx_ac97_driver);
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");