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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 | |
29 | static 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 | |
38 | static 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 | |
44 | static 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 | |
52 | static 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 | |
60 | static struct snd_pcm *pxa2xx_ac97_pcm; |
61 | static struct snd_ac97 *pxa2xx_ac97_ac97; |
62 | |
63 | static 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 | |
84 | static 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 | |
93 | static 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 | |
101 | static 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 | |
111 | static 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 | |
124 | static 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 | |
141 | static 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 | |
152 | static 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 | |
163 | static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); |
164 | #endif |
165 | |
166 | static int 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 | |
218 | err_remove: |
219 | pxa2xx_ac97_hw_remove(dev); |
220 | err: |
221 | if (card) |
222 | snd_card_free(card); |
223 | err_dev: |
224 | return ret; |
225 | } |
226 | |
227 | static int 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 | pxa2xx_ac97_hw_remove(dev); |
234 | } |
235 | |
236 | return 0; |
237 | } |
238 | |
239 | static struct platform_driver pxa2xx_ac97_driver = { |
240 | .probe = pxa2xx_ac97_probe, |
241 | .remove = pxa2xx_ac97_remove, |
242 | .driver = { |
243 | .name = "pxa2xx-ac97", |
244 | .owner = THIS_MODULE, |
245 | #ifdef CONFIG_PM_SLEEP |
246 | .pm = &pxa2xx_ac97_pm_ops, |
247 | #endif |
248 | }, |
249 | }; |
250 | |
251 | module_platform_driver(pxa2xx_ac97_driver); |
252 | |
253 | MODULE_AUTHOR("Nicolas Pitre"); |
254 | MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); |
255 | MODULE_LICENSE("GPL"); |
256 | MODULE_ALIAS("platform:pxa2xx-ac97"); |
257 |
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