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10#include <linux/init.h>
11#include <linux/io.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/dmaengine.h>
15#include <linux/dma-mapping.h>
16
17#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/ac97_codec.h>
20#include <sound/initval.h>
21#include <sound/pxa2xx-lib.h>
22#include <sound/dmaengine_pcm.h>
23
24#include <mach/regs-ac97.h>
25#include <mach/audio.h>
26
27static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
28{
29 if (!pxa2xx_ac97_try_cold_reset())
30 pxa2xx_ac97_try_warm_reset();
31
32 pxa2xx_ac97_finish_reset();
33}
34
35static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
36 unsigned short reg)
37{
38 int ret;
39
40 ret = pxa2xx_ac97_read(ac97->num, reg);
41 if (ret < 0)
42 return 0;
43 else
44 return (unsigned short)(ret & 0xffff);
45}
46
47static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
48 unsigned short reg, unsigned short val)
49{
50 int __always_unused ret;
51
52 ret = pxa2xx_ac97_write(ac97->num, reg, val);
53}
54
55static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
56 .read = pxa2xx_ac97_legacy_read,
57 .write = pxa2xx_ac97_legacy_write,
58 .reset = pxa2xx_ac97_legacy_reset,
59};
60
61static struct snd_pcm *pxa2xx_ac97_pcm;
62static struct snd_ac97 *pxa2xx_ac97_ac97;
63
64static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
65{
66 struct snd_pcm_runtime *runtime = substream->runtime;
67 pxa2xx_audio_ops_t *platform_ops;
68 int ret, i;
69
70 ret = pxa2xx_pcm_open(substream);
71 if (ret)
72 return ret;
73
74 runtime->hw.channels_min = 2;
75 runtime->hw.channels_max = 2;
76
77 i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
78 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
79 runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
80 snd_pcm_limit_hw_rates(runtime);
81
82 platform_ops = substream->pcm->card->dev->platform_data;
83 if (platform_ops && platform_ops->startup) {
84 ret = platform_ops->startup(substream, platform_ops->priv);
85 if (ret < 0)
86 pxa2xx_pcm_close(substream);
87 }
88
89 return ret;
90}
91
92static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
93{
94 pxa2xx_audio_ops_t *platform_ops;
95
96 platform_ops = substream->pcm->card->dev->platform_data;
97 if (platform_ops && platform_ops->shutdown)
98 platform_ops->shutdown(substream, platform_ops->priv);
99
100 return 0;
101}
102
103static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
104{
105 struct snd_pcm_runtime *runtime = substream->runtime;
106 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
107 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
108 int ret;
109
110 ret = pxa2xx_pcm_prepare(substream);
111 if (ret < 0)
112 return ret;
113
114 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
115}
116
117#ifdef CONFIG_PM_SLEEP
118
119static int pxa2xx_ac97_do_suspend(struct snd_card *card)
120{
121 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
122
123 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
124 snd_ac97_suspend(pxa2xx_ac97_ac97);
125 if (platform_ops && platform_ops->suspend)
126 platform_ops->suspend(platform_ops->priv);
127
128 return pxa2xx_ac97_hw_suspend();
129}
130
131static int pxa2xx_ac97_do_resume(struct snd_card *card)
132{
133 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
134 int rc;
135
136 rc = pxa2xx_ac97_hw_resume();
137 if (rc)
138 return rc;
139
140 if (platform_ops && platform_ops->resume)
141 platform_ops->resume(platform_ops->priv);
142 snd_ac97_resume(pxa2xx_ac97_ac97);
143 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
144
145 return 0;
146}
147
148static int pxa2xx_ac97_suspend(struct device *dev)
149{
150 struct snd_card *card = dev_get_drvdata(dev);
151 int ret = 0;
152
153 if (card)
154 ret = pxa2xx_ac97_do_suspend(card);
155
156 return ret;
157}
158
159static int pxa2xx_ac97_resume(struct device *dev)
160{
161 struct snd_card *card = dev_get_drvdata(dev);
162 int ret = 0;
163
164 if (card)
165 ret = pxa2xx_ac97_do_resume(card);
166
167 return ret;
168}
169
170static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
171#endif
172
173static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
174 .open = pxa2xx_ac97_pcm_open,
175 .close = pxa2xx_ac97_pcm_close,
176 .ioctl = snd_pcm_lib_ioctl,
177 .hw_params = pxa2xx_pcm_hw_params,
178 .hw_free = pxa2xx_pcm_hw_free,
179 .prepare = pxa2xx_ac97_pcm_prepare,
180 .trigger = pxa2xx_pcm_trigger,
181 .pointer = pxa2xx_pcm_pointer,
182 .mmap = pxa2xx_pcm_mmap,
183};
184
185
186static int pxa2xx_ac97_pcm_new(struct snd_card *card)
187{
188 struct snd_pcm *pcm;
189 int stream, ret;
190
191 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
192 if (ret)
193 goto out;
194
195 pcm->private_free = pxa2xx_pcm_free_dma_buffers;
196
197 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
198 if (ret)
199 goto out;
200
201 stream = SNDRV_PCM_STREAM_PLAYBACK;
202 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
203 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
204 if (ret)
205 goto out;
206
207 stream = SNDRV_PCM_STREAM_CAPTURE;
208 snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
209 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
210 if (ret)
211 goto out;
212
213 pxa2xx_ac97_pcm = pcm;
214 ret = 0;
215
216 out:
217 return ret;
218}
219
220static int pxa2xx_ac97_probe(struct platform_device *dev)
221{
222 struct snd_card *card;
223 struct snd_ac97_bus *ac97_bus;
224 struct snd_ac97_template ac97_template;
225 int ret;
226 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
227
228 if (dev->id >= 0) {
229 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
230 ret = -ENXIO;
231 goto err_dev;
232 }
233
234 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
235 THIS_MODULE, 0, &card);
236 if (ret < 0)
237 goto err;
238
239 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
240
241 ret = pxa2xx_ac97_pcm_new(card);
242 if (ret)
243 goto err;
244
245 ret = pxa2xx_ac97_hw_probe(dev);
246 if (ret)
247 goto err;
248
249 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
250 if (ret)
251 goto err_remove;
252 memset(&ac97_template, 0, sizeof(ac97_template));
253 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
254 if (ret)
255 goto err_remove;
256
257 snprintf(card->shortname, sizeof(card->shortname),
258 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
259 snprintf(card->longname, sizeof(card->longname),
260 "%s (%s)", dev->dev.driver->name, card->mixername);
261
262 if (pdata && pdata->codec_pdata[0])
263 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
264 ret = snd_card_register(card);
265 if (ret == 0) {
266 platform_set_drvdata(dev, card);
267 return 0;
268 }
269
270err_remove:
271 pxa2xx_ac97_hw_remove(dev);
272err:
273 if (card)
274 snd_card_free(card);
275err_dev:
276 return ret;
277}
278
279static int pxa2xx_ac97_remove(struct platform_device *dev)
280{
281 struct snd_card *card = platform_get_drvdata(dev);
282
283 if (card) {
284 snd_card_free(card);
285 pxa2xx_ac97_hw_remove(dev);
286 }
287
288 return 0;
289}
290
291static struct platform_driver pxa2xx_ac97_driver = {
292 .probe = pxa2xx_ac97_probe,
293 .remove = pxa2xx_ac97_remove,
294 .driver = {
295 .name = "pxa2xx-ac97",
296#ifdef CONFIG_PM_SLEEP
297 .pm = &pxa2xx_ac97_pm_ops,
298#endif
299 },
300};
301
302module_platform_driver(pxa2xx_ac97_driver);
303
304MODULE_AUTHOR("Nicolas Pitre");
305MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
306MODULE_LICENSE("GPL");
307MODULE_ALIAS("platform:pxa2xx-ac97");
308
