tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
3 *
4 * Author: Nicolas Pitre
5 * Created: Dec 02, 2004
6 * Copyright: MontaVista Software Inc.
7 *
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.
11 */
12
13#include <linux/init.h>
14#include <linux/io.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/ac97_codec.h>
21#include <sound/initval.h>
22#include <sound/pxa2xx-lib.h>
23
24#include <mach/regs-ac97.h>
25#include <mach/audio.h>
26
27#include "pxa2xx-pcm.h"
28
29static void pxa2xx_ac97_reset(struct snd_ac97 *ac97)
30{
31 if (!pxa2xx_ac97_try_cold_reset(ac97)) {
32 pxa2xx_ac97_try_warm_reset(ac97);
33 }
34
35 pxa2xx_ac97_finish_reset(ac97);
36}
37
38static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
39 .read = pxa2xx_ac97_read,
40 .write = pxa2xx_ac97_write,
41 .reset = pxa2xx_ac97_reset,
42};
43
44static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = {
45 .name = "AC97 PCM out",
46 .dev_addr = __PREG(PCDR),
47 .drcmr = &DRCMR(12),
48 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
49 DCMD_BURST32 | DCMD_WIDTH4,
50};
51
52static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = {
53 .name = "AC97 PCM in",
54 .dev_addr = __PREG(PCDR),
55 .drcmr = &DRCMR(11),
56 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
57 DCMD_BURST32 | DCMD_WIDTH4,
58};
59
60static struct snd_pcm *pxa2xx_ac97_pcm;
61static struct snd_ac97 *pxa2xx_ac97_ac97;
62
63static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
64{
65 struct snd_pcm_runtime *runtime = substream->runtime;
66 pxa2xx_audio_ops_t *platform_ops;
67 int r;
68
69 runtime->hw.channels_min = 2;
70 runtime->hw.channels_max = 2;
71
72 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
73 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
74 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
75 snd_pcm_limit_hw_rates(runtime);
76
77 platform_ops = substream->pcm->card->dev->platform_data;
78 if (platform_ops && platform_ops->startup)
79 return platform_ops->startup(substream, platform_ops->priv);
80 else
81 return 0;
82}
83
84static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
85{
86 pxa2xx_audio_ops_t *platform_ops;
87
88 platform_ops = substream->pcm->card->dev->platform_data;
89 if (platform_ops && platform_ops->shutdown)
90 platform_ops->shutdown(substream, platform_ops->priv);
91}
92
93static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
94{
95 struct snd_pcm_runtime *runtime = substream->runtime;
96 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
97 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
98 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
99}
100
101static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
102 .playback_params = &pxa2xx_ac97_pcm_out,
103 .capture_params = &pxa2xx_ac97_pcm_in,
104 .startup = pxa2xx_ac97_pcm_startup,
105 .shutdown = pxa2xx_ac97_pcm_shutdown,
106 .prepare = pxa2xx_ac97_pcm_prepare,
107};
108
109#ifdef CONFIG_PM_SLEEP
110
111static int pxa2xx_ac97_do_suspend(struct snd_card *card)
112{
113 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
114
115 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
116 snd_pcm_suspend_all(pxa2xx_ac97_pcm);
117 snd_ac97_suspend(pxa2xx_ac97_ac97);
118 if (platform_ops && platform_ops->suspend)
119 platform_ops->suspend(platform_ops->priv);
120
121 return pxa2xx_ac97_hw_suspend();
122}
123
124static int pxa2xx_ac97_do_resume(struct snd_card *card)
125{
126 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
127 int rc;
128
129 rc = pxa2xx_ac97_hw_resume();
130 if (rc)
131 return rc;
132
133 if (platform_ops && platform_ops->resume)
134 platform_ops->resume(platform_ops->priv);
135 snd_ac97_resume(pxa2xx_ac97_ac97);
136 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
137
138 return 0;
139}
140
141static int pxa2xx_ac97_suspend(struct device *dev)
142{
143 struct snd_card *card = dev_get_drvdata(dev);
144 int ret = 0;
145
146 if (card)
147 ret = pxa2xx_ac97_do_suspend(card);
148
149 return ret;
150}
151
152static int pxa2xx_ac97_resume(struct device *dev)
153{
154 struct snd_card *card = dev_get_drvdata(dev);
155 int ret = 0;
156
157 if (card)
158 ret = pxa2xx_ac97_do_resume(card);
159
160 return ret;
161}
162
163static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
164#endif
165
166static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
167{
168 struct snd_card *card;
169 struct snd_ac97_bus *ac97_bus;
170 struct snd_ac97_template ac97_template;
171 int ret;
172 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
173
174 if (dev->id >= 0) {
175 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
176 ret = -ENXIO;
177 goto err_dev;
178 }
179
180 ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
181 THIS_MODULE, 0, &card);
182 if (ret < 0)
183 goto err;
184
185 card->dev = &dev->dev;
186 strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
187
188 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
189 if (ret)
190 goto err;
191
192 ret = pxa2xx_ac97_hw_probe(dev);
193 if (ret)
194 goto err;
195
196 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
197 if (ret)
198 goto err_remove;
199 memset(&ac97_template, 0, sizeof(ac97_template));
200 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
201 if (ret)
202 goto err_remove;
203
204 snprintf(card->shortname, sizeof(card->shortname),
205 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
206 snprintf(card->longname, sizeof(card->longname),
207 "%s (%s)", dev->dev.driver->name, card->mixername);
208
209 if (pdata && pdata->codec_pdata[0])
210 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
211 snd_card_set_dev(card, &dev->dev);
212 ret = snd_card_register(card);
213 if (ret == 0) {
214 platform_set_drvdata(dev, card);
215 return 0;
216 }
217
218err_remove:
219 pxa2xx_ac97_hw_remove(dev);
220err:
221 if (card)
222 snd_card_free(card);
223err_dev:
224 return ret;
225}
226
227static int __devexit pxa2xx_ac97_remove(struct platform_device *dev)
228{
229 struct snd_card *card = platform_get_drvdata(dev);
230
231 if (card) {
232 snd_card_free(card);
233 platform_set_drvdata(dev, NULL);
234 pxa2xx_ac97_hw_remove(dev);
235 }
236
237 return 0;
238}
239
240static struct platform_driver pxa2xx_ac97_driver = {
241 .probe = pxa2xx_ac97_probe,
242 .remove = __devexit_p(pxa2xx_ac97_remove),
243 .driver = {
244 .name = "pxa2xx-ac97",
245 .owner = THIS_MODULE,
246#ifdef CONFIG_PM_SLEEP
247 .pm = &pxa2xx_ac97_pm_ops,
248#endif
249 },
250};
251
252module_platform_driver(pxa2xx_ac97_driver);
253
254MODULE_AUTHOR("Nicolas Pitre");
255MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
256MODULE_LICENSE("GPL");
257MODULE_ALIAS("platform:pxa2xx-ac97");