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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
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
31static 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
40static 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
46static unsigned long pxa2xx_ac97_pcm_out_req = 12;
47static 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
54static unsigned long pxa2xx_ac97_pcm_in_req = 11;
55static 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
62static struct snd_pcm *pxa2xx_ac97_pcm;
63static struct snd_ac97 *pxa2xx_ac97_ac97;
64
65static 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
86static 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
95static 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
103static 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
113static 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
126static 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
143static 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
154static 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
165static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
166#endif
167
168static 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_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
183 THIS_MODULE, 0, &card);
184 if (ret < 0)
185 goto err;
186
187 card->dev = &dev->dev;
188 strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
189
190 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
191 if (ret)
192 goto err;
193
194 ret = pxa2xx_ac97_hw_probe(dev);
195 if (ret)
196 goto err;
197
198 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
199 if (ret)
200 goto err_remove;
201 memset(&ac97_template, 0, sizeof(ac97_template));
202 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
203 if (ret)
204 goto err_remove;
205
206 snprintf(card->shortname, sizeof(card->shortname),
207 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
208 snprintf(card->longname, sizeof(card->longname),
209 "%s (%s)", dev->dev.driver->name, card->mixername);
210
211 if (pdata && pdata->codec_pdata[0])
212 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
213 snd_card_set_dev(card, &dev->dev);
214 ret = snd_card_register(card);
215 if (ret == 0) {
216 platform_set_drvdata(dev, card);
217 return 0;
218 }
219
220err_remove:
221 pxa2xx_ac97_hw_remove(dev);
222err:
223 if (card)
224 snd_card_free(card);
225err_dev:
226 return ret;
227}
228
229static int pxa2xx_ac97_remove(struct platform_device *dev)
230{
231 struct snd_card *card = platform_get_drvdata(dev);
232
233 if (card) {
234 snd_card_free(card);
235 pxa2xx_ac97_hw_remove(dev);
236 }
237
238 return 0;
239}
240
241static struct platform_driver pxa2xx_ac97_driver = {
242 .probe = pxa2xx_ac97_probe,
243 .remove = pxa2xx_ac97_remove,
244 .driver = {
245 .name = "pxa2xx-ac97",
246 .owner = THIS_MODULE,
247#ifdef CONFIG_PM_SLEEP
248 .pm = &pxa2xx_ac97_pm_ops,
249#endif
250 },
251};
252
253module_platform_driver(pxa2xx_ac97_driver);
254
255MODULE_AUTHOR("Nicolas Pitre");
256MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
257MODULE_LICENSE("GPL");
258MODULE_ALIAS("platform:pxa2xx-ac97");
259
