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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#include <linux/dma/pxa-dma.h>
19
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/ac97_codec.h>
23#include <sound/initval.h>
24#include <sound/pxa2xx-lib.h>
25#include <sound/dmaengine_pcm.h>
26
27#include <mach/regs-ac97.h>
28#include <mach/audio.h>
29
30#include "pxa2xx-pcm.h"
31
32static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
33{
34 if (!pxa2xx_ac97_try_cold_reset())
35 pxa2xx_ac97_try_warm_reset();
36
37 pxa2xx_ac97_finish_reset();
38}
39
40static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
41 unsigned short reg)
42{
43 int ret;
44
45 ret = pxa2xx_ac97_read(ac97->num, reg);
46 if (ret < 0)
47 return 0;
48 else
49 return (unsigned short)(ret & 0xffff);
50}
51
52static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
53 unsigned short reg, unsigned short val)
54{
55 int __always_unused ret;
56
57 ret = pxa2xx_ac97_write(ac97->num, reg, val);
58}
59
60static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
61 .read = pxa2xx_ac97_legacy_read,
62 .write = pxa2xx_ac97_legacy_write,
63 .reset = pxa2xx_ac97_legacy_reset,
64};
65
66static struct pxad_param pxa2xx_ac97_pcm_out_req = {
67 .prio = PXAD_PRIO_LOWEST,
68 .drcmr = 12,
69};
70
71static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
72 .addr = __PREG(PCDR),
73 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
74 .maxburst = 32,
75 .filter_data = &pxa2xx_ac97_pcm_out_req,
76};
77
78static struct pxad_param pxa2xx_ac97_pcm_in_req = {
79 .prio = PXAD_PRIO_LOWEST,
80 .drcmr = 11,
81};
82
83static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
84 .addr = __PREG(PCDR),
85 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
86 .maxburst = 32,
87 .filter_data = &pxa2xx_ac97_pcm_in_req,
88};
89
90static struct snd_pcm *pxa2xx_ac97_pcm;
91static struct snd_ac97 *pxa2xx_ac97_ac97;
92
93static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
94{
95 struct snd_pcm_runtime *runtime = substream->runtime;
96 pxa2xx_audio_ops_t *platform_ops;
97 int r;
98
99 runtime->hw.channels_min = 2;
100 runtime->hw.channels_max = 2;
101
102 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
103 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
104 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
105 snd_pcm_limit_hw_rates(runtime);
106
107 platform_ops = substream->pcm->card->dev->platform_data;
108 if (platform_ops && platform_ops->startup)
109 return platform_ops->startup(substream, platform_ops->priv);
110 else
111 return 0;
112}
113
114static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
115{
116 pxa2xx_audio_ops_t *platform_ops;
117
118 platform_ops = substream->pcm->card->dev->platform_data;
119 if (platform_ops && platform_ops->shutdown)
120 platform_ops->shutdown(substream, platform_ops->priv);
121}
122
123static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
124{
125 struct snd_pcm_runtime *runtime = substream->runtime;
126 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
127 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
128 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
129}
130
131static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
132 .playback_params = &pxa2xx_ac97_pcm_out,
133 .capture_params = &pxa2xx_ac97_pcm_in,
134 .startup = pxa2xx_ac97_pcm_startup,
135 .shutdown = pxa2xx_ac97_pcm_shutdown,
136 .prepare = pxa2xx_ac97_pcm_prepare,
137};
138
139#ifdef CONFIG_PM_SLEEP
140
141static int pxa2xx_ac97_do_suspend(struct snd_card *card)
142{
143 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
144
145 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
146 snd_pcm_suspend_all(pxa2xx_ac97_pcm);
147 snd_ac97_suspend(pxa2xx_ac97_ac97);
148 if (platform_ops && platform_ops->suspend)
149 platform_ops->suspend(platform_ops->priv);
150
151 return pxa2xx_ac97_hw_suspend();
152}
153
154static int pxa2xx_ac97_do_resume(struct snd_card *card)
155{
156 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
157 int rc;
158
159 rc = pxa2xx_ac97_hw_resume();
160 if (rc)
161 return rc;
162
163 if (platform_ops && platform_ops->resume)
164 platform_ops->resume(platform_ops->priv);
165 snd_ac97_resume(pxa2xx_ac97_ac97);
166 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
167
168 return 0;
169}
170
171static int pxa2xx_ac97_suspend(struct device *dev)
172{
173 struct snd_card *card = dev_get_drvdata(dev);
174 int ret = 0;
175
176 if (card)
177 ret = pxa2xx_ac97_do_suspend(card);
178
179 return ret;
180}
181
182static int pxa2xx_ac97_resume(struct device *dev)
183{
184 struct snd_card *card = dev_get_drvdata(dev);
185 int ret = 0;
186
187 if (card)
188 ret = pxa2xx_ac97_do_resume(card);
189
190 return ret;
191}
192
193static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
194#endif
195
196static int pxa2xx_ac97_probe(struct platform_device *dev)
197{
198 struct snd_card *card;
199 struct snd_ac97_bus *ac97_bus;
200 struct snd_ac97_template ac97_template;
201 int ret;
202 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
203
204 if (dev->id >= 0) {
205 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
206 ret = -ENXIO;
207 goto err_dev;
208 }
209
210 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
211 THIS_MODULE, 0, &card);
212 if (ret < 0)
213 goto err;
214
215 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
216
217 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
218 if (ret)
219 goto err;
220
221 ret = pxa2xx_ac97_hw_probe(dev);
222 if (ret)
223 goto err;
224
225 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
226 if (ret)
227 goto err_remove;
228 memset(&ac97_template, 0, sizeof(ac97_template));
229 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
230 if (ret)
231 goto err_remove;
232
233 snprintf(card->shortname, sizeof(card->shortname),
234 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
235 snprintf(card->longname, sizeof(card->longname),
236 "%s (%s)", dev->dev.driver->name, card->mixername);
237
238 if (pdata && pdata->codec_pdata[0])
239 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
240 ret = snd_card_register(card);
241 if (ret == 0) {
242 platform_set_drvdata(dev, card);
243 return 0;
244 }
245
246err_remove:
247 pxa2xx_ac97_hw_remove(dev);
248err:
249 if (card)
250 snd_card_free(card);
251err_dev:
252 return ret;
253}
254
255static int pxa2xx_ac97_remove(struct platform_device *dev)
256{
257 struct snd_card *card = platform_get_drvdata(dev);
258
259 if (card) {
260 snd_card_free(card);
261 pxa2xx_ac97_hw_remove(dev);
262 }
263
264 return 0;
265}
266
267static struct platform_driver pxa2xx_ac97_driver = {
268 .probe = pxa2xx_ac97_probe,
269 .remove = pxa2xx_ac97_remove,
270 .driver = {
271 .name = "pxa2xx-ac97",
272#ifdef CONFIG_PM_SLEEP
273 .pm = &pxa2xx_ac97_pm_ops,
274#endif
275 },
276};
277
278module_platform_driver(pxa2xx_ac97_driver);
279
280MODULE_AUTHOR("Nicolas Pitre");
281MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
282MODULE_LICENSE("GPL");
283MODULE_ALIAS("platform:pxa2xx-ac97");
284
