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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 | #include <linux/dmaengine.h> |
18 | |
19 | #include <sound/core.h> |
20 | #include <sound/pcm.h> |
21 | #include <sound/ac97_codec.h> |
22 | #include <sound/initval.h> |
23 | #include <sound/pxa2xx-lib.h> |
24 | #include <sound/dmaengine_pcm.h> |
25 | |
26 | #include <mach/regs-ac97.h> |
27 | #include <mach/audio.h> |
28 | |
29 | #include "pxa2xx-pcm.h" |
30 | |
31 | static void pxa2xx_ac97_reset(struct snd_ac97 *ac97) |
32 | { |
33 | if (!pxa2xx_ac97_try_cold_reset(ac97)) { |
34 | pxa2xx_ac97_try_warm_reset(ac97); |
35 | } |
36 | |
37 | pxa2xx_ac97_finish_reset(ac97); |
38 | } |
39 | |
40 | static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { |
41 | .read = pxa2xx_ac97_read, |
42 | .write = pxa2xx_ac97_write, |
43 | .reset = pxa2xx_ac97_reset, |
44 | }; |
45 | |
46 | static unsigned long pxa2xx_ac97_pcm_out_req = 12; |
47 | static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = { |
48 | .addr = __PREG(PCDR), |
49 | .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, |
50 | .maxburst = 32, |
51 | .filter_data = &pxa2xx_ac97_pcm_out_req, |
52 | }; |
53 | |
54 | static unsigned long pxa2xx_ac97_pcm_in_req = 11; |
55 | static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = { |
56 | .addr = __PREG(PCDR), |
57 | .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, |
58 | .maxburst = 32, |
59 | .filter_data = &pxa2xx_ac97_pcm_in_req, |
60 | }; |
61 | |
62 | static struct snd_pcm *pxa2xx_ac97_pcm; |
63 | static struct snd_ac97 *pxa2xx_ac97_ac97; |
64 | |
65 | static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream) |
66 | { |
67 | struct snd_pcm_runtime *runtime = substream->runtime; |
68 | pxa2xx_audio_ops_t *platform_ops; |
69 | int r; |
70 | |
71 | runtime->hw.channels_min = 2; |
72 | runtime->hw.channels_max = 2; |
73 | |
74 | r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
75 | AC97_RATES_FRONT_DAC : AC97_RATES_ADC; |
76 | runtime->hw.rates = pxa2xx_ac97_ac97->rates[r]; |
77 | snd_pcm_limit_hw_rates(runtime); |
78 | |
79 | platform_ops = substream->pcm->card->dev->platform_data; |
80 | if (platform_ops && platform_ops->startup) |
81 | return platform_ops->startup(substream, platform_ops->priv); |
82 | else |
83 | return 0; |
84 | } |
85 | |
86 | static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream) |
87 | { |
88 | pxa2xx_audio_ops_t *platform_ops; |
89 | |
90 | platform_ops = substream->pcm->card->dev->platform_data; |
91 | if (platform_ops && platform_ops->shutdown) |
92 | platform_ops->shutdown(substream, platform_ops->priv); |
93 | } |
94 | |
95 | static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) |
96 | { |
97 | struct snd_pcm_runtime *runtime = substream->runtime; |
98 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
99 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; |
100 | return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); |
101 | } |
102 | |
103 | static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = { |
104 | .playback_params = &pxa2xx_ac97_pcm_out, |
105 | .capture_params = &pxa2xx_ac97_pcm_in, |
106 | .startup = pxa2xx_ac97_pcm_startup, |
107 | .shutdown = pxa2xx_ac97_pcm_shutdown, |
108 | .prepare = pxa2xx_ac97_pcm_prepare, |
109 | }; |
110 | |
111 | #ifdef CONFIG_PM_SLEEP |
112 | |
113 | static int pxa2xx_ac97_do_suspend(struct snd_card *card) |
114 | { |
115 | pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; |
116 | |
117 | snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); |
118 | snd_pcm_suspend_all(pxa2xx_ac97_pcm); |
119 | snd_ac97_suspend(pxa2xx_ac97_ac97); |
120 | if (platform_ops && platform_ops->suspend) |
121 | platform_ops->suspend(platform_ops->priv); |
122 | |
123 | return pxa2xx_ac97_hw_suspend(); |
124 | } |
125 | |
126 | static int pxa2xx_ac97_do_resume(struct snd_card *card) |
127 | { |
128 | pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; |
129 | int rc; |
130 | |
131 | rc = pxa2xx_ac97_hw_resume(); |
132 | if (rc) |
133 | return rc; |
134 | |
135 | if (platform_ops && platform_ops->resume) |
136 | platform_ops->resume(platform_ops->priv); |
137 | snd_ac97_resume(pxa2xx_ac97_ac97); |
138 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); |
139 | |
140 | return 0; |
141 | } |
142 | |
143 | static int pxa2xx_ac97_suspend(struct device *dev) |
144 | { |
145 | struct snd_card *card = dev_get_drvdata(dev); |
146 | int ret = 0; |
147 | |
148 | if (card) |
149 | ret = pxa2xx_ac97_do_suspend(card); |
150 | |
151 | return ret; |
152 | } |
153 | |
154 | static int pxa2xx_ac97_resume(struct device *dev) |
155 | { |
156 | struct snd_card *card = dev_get_drvdata(dev); |
157 | int ret = 0; |
158 | |
159 | if (card) |
160 | ret = pxa2xx_ac97_do_resume(card); |
161 | |
162 | return ret; |
163 | } |
164 | |
165 | static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume); |
166 | #endif |
167 | |
168 | static int pxa2xx_ac97_probe(struct platform_device *dev) |
169 | { |
170 | struct snd_card *card; |
171 | struct snd_ac97_bus *ac97_bus; |
172 | struct snd_ac97_template ac97_template; |
173 | int ret; |
174 | pxa2xx_audio_ops_t *pdata = dev->dev.platform_data; |
175 | |
176 | if (dev->id >= 0) { |
177 | dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n"); |
178 | ret = -ENXIO; |
179 | goto err_dev; |
180 | } |
181 | |
182 | ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, |
183 | THIS_MODULE, 0, &card); |
184 | if (ret < 0) |
185 | goto err; |
186 | |
187 | strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); |
188 | |
189 | ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm); |
190 | if (ret) |
191 | goto err; |
192 | |
193 | ret = pxa2xx_ac97_hw_probe(dev); |
194 | if (ret) |
195 | goto err; |
196 | |
197 | ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); |
198 | if (ret) |
199 | goto err_remove; |
200 | memset(&ac97_template, 0, sizeof(ac97_template)); |
201 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); |
202 | if (ret) |
203 | goto err_remove; |
204 | |
205 | snprintf(card->shortname, sizeof(card->shortname), |
206 | "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); |
207 | snprintf(card->longname, sizeof(card->longname), |
208 | "%s (%s)", dev->dev.driver->name, card->mixername); |
209 | |
210 | if (pdata && pdata->codec_pdata[0]) |
211 | snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]); |
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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