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