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_reset(struct snd_ac97 *ac97)
34 if (!pxa2xx_ac97_try_cold_reset(ac97)) {
35 pxa2xx_ac97_try_warm_reset(ac97);
38 pxa2xx_ac97_finish_reset(ac97);
41 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
42 .read = pxa2xx_ac97_read,
43 .write = pxa2xx_ac97_write,
44 .reset = pxa2xx_ac97_reset,
47 static struct pxad_param pxa2xx_ac97_pcm_out_req = {
48 .prio = PXAD_PRIO_LOWEST,
52 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
54 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
56 .filter_data = &pxa2xx_ac97_pcm_out_req,
59 static struct pxad_param pxa2xx_ac97_pcm_in_req = {
60 .prio = PXAD_PRIO_LOWEST,
64 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
66 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
68 .filter_data = &pxa2xx_ac97_pcm_in_req,
71 static struct snd_pcm *pxa2xx_ac97_pcm;
72 static struct snd_ac97 *pxa2xx_ac97_ac97;
74 static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
76 struct snd_pcm_runtime *runtime = substream->runtime;
77 pxa2xx_audio_ops_t *platform_ops;
80 runtime->hw.channels_min = 2;
81 runtime->hw.channels_max = 2;
83 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
84 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
85 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
86 snd_pcm_limit_hw_rates(runtime);
88 platform_ops = substream->pcm->card->dev->platform_data;
89 if (platform_ops && platform_ops->startup)
90 return platform_ops->startup(substream, platform_ops->priv);
95 static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
97 pxa2xx_audio_ops_t *platform_ops;
99 platform_ops = substream->pcm->card->dev->platform_data;
100 if (platform_ops && platform_ops->shutdown)
101 platform_ops->shutdown(substream, platform_ops->priv);
104 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
106 struct snd_pcm_runtime *runtime = substream->runtime;
107 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
108 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
109 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
112 static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
113 .playback_params = &pxa2xx_ac97_pcm_out,
114 .capture_params = &pxa2xx_ac97_pcm_in,
115 .startup = pxa2xx_ac97_pcm_startup,
116 .shutdown = pxa2xx_ac97_pcm_shutdown,
117 .prepare = pxa2xx_ac97_pcm_prepare,
120 #ifdef CONFIG_PM_SLEEP
122 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
124 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
126 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
127 snd_pcm_suspend_all(pxa2xx_ac97_pcm);
128 snd_ac97_suspend(pxa2xx_ac97_ac97);
129 if (platform_ops && platform_ops->suspend)
130 platform_ops->suspend(platform_ops->priv);
132 return pxa2xx_ac97_hw_suspend();
135 static int pxa2xx_ac97_do_resume(struct snd_card *card)
137 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
140 rc = pxa2xx_ac97_hw_resume();
144 if (platform_ops && platform_ops->resume)
145 platform_ops->resume(platform_ops->priv);
146 snd_ac97_resume(pxa2xx_ac97_ac97);
147 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
152 static int pxa2xx_ac97_suspend(struct device *dev)
154 struct snd_card *card = dev_get_drvdata(dev);
158 ret = pxa2xx_ac97_do_suspend(card);
163 static int pxa2xx_ac97_resume(struct device *dev)
165 struct snd_card *card = dev_get_drvdata(dev);
169 ret = pxa2xx_ac97_do_resume(card);
174 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
177 static int pxa2xx_ac97_probe(struct platform_device *dev)
179 struct snd_card *card;
180 struct snd_ac97_bus *ac97_bus;
181 struct snd_ac97_template ac97_template;
183 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
186 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
191 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
192 THIS_MODULE, 0, &card);
196 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
198 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
202 ret = pxa2xx_ac97_hw_probe(dev);
206 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
209 memset(&ac97_template, 0, sizeof(ac97_template));
210 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
214 snprintf(card->shortname, sizeof(card->shortname),
215 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
216 snprintf(card->longname, sizeof(card->longname),
217 "%s (%s)", dev->dev.driver->name, card->mixername);
219 if (pdata && pdata->codec_pdata[0])
220 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
221 ret = snd_card_register(card);
223 platform_set_drvdata(dev, card);
228 pxa2xx_ac97_hw_remove(dev);
236 static int pxa2xx_ac97_remove(struct platform_device *dev)
238 struct snd_card *card = platform_get_drvdata(dev);
242 pxa2xx_ac97_hw_remove(dev);
248 static struct platform_driver pxa2xx_ac97_driver = {
249 .probe = pxa2xx_ac97_probe,
250 .remove = pxa2xx_ac97_remove,
252 .name = "pxa2xx-ac97",
253 #ifdef CONFIG_PM_SLEEP
254 .pm = &pxa2xx_ac97_pm_ops,
259 module_platform_driver(pxa2xx_ac97_driver);
261 MODULE_AUTHOR("Nicolas Pitre");
262 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
263 MODULE_LICENSE("GPL");
264 MODULE_ALIAS("platform:pxa2xx-ac97");