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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_reset(struct snd_ac97 *ac97)
33{
34 if (!pxa2xx_ac97_try_cold_reset(ac97)) {
35 pxa2xx_ac97_try_warm_reset(ac97);
36 }
37
38 pxa2xx_ac97_finish_reset(ac97);
39}
40
41static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
42 .read = pxa2xx_ac97_read,
43 .write = pxa2xx_ac97_write,
44 .reset = pxa2xx_ac97_reset,
45};
46
47static struct pxad_param pxa2xx_ac97_pcm_out_req = {
48 .prio = PXAD_PRIO_LOWEST,
49 .drcmr = 12,
50};
51
52static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_out = {
53 .addr = __PREG(PCDR),
54 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
55 .maxburst = 32,
56 .filter_data = &pxa2xx_ac97_pcm_out_req,
57};
58
59static struct pxad_param pxa2xx_ac97_pcm_in_req = {
60 .prio = PXAD_PRIO_LOWEST,
61 .drcmr = 11,
62};
63
64static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_in = {
65 .addr = __PREG(PCDR),
66 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
67 .maxburst = 32,
68 .filter_data = &pxa2xx_ac97_pcm_in_req,
69};
70
71static struct snd_pcm *pxa2xx_ac97_pcm;
72static struct snd_ac97 *pxa2xx_ac97_ac97;
73
74static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream)
75{
76 struct snd_pcm_runtime *runtime = substream->runtime;
77 pxa2xx_audio_ops_t *platform_ops;
78 int r;
79
80 runtime->hw.channels_min = 2;
81 runtime->hw.channels_max = 2;
82
83 r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
84 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
85 runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
86 snd_pcm_limit_hw_rates(runtime);
87
88 platform_ops = substream->pcm->card->dev->platform_data;
89 if (platform_ops && platform_ops->startup)
90 return platform_ops->startup(substream, platform_ops->priv);
91 else
92 return 0;
93}
94
95static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
96{
97 pxa2xx_audio_ops_t *platform_ops;
98
99 platform_ops = substream->pcm->card->dev->platform_data;
100 if (platform_ops && platform_ops->shutdown)
101 platform_ops->shutdown(substream, platform_ops->priv);
102}
103
104static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
105{
106 struct snd_pcm_runtime *runtime = substream->runtime;
107 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
108 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
109 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
110}
111
112static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = {
113 .playback_params = &pxa2xx_ac97_pcm_out,
114 .capture_params = &pxa2xx_ac97_pcm_in,
115 .startup = pxa2xx_ac97_pcm_startup,
116 .shutdown = pxa2xx_ac97_pcm_shutdown,
117 .prepare = pxa2xx_ac97_pcm_prepare,
118};
119
120#ifdef CONFIG_PM_SLEEP
121
122static int pxa2xx_ac97_do_suspend(struct snd_card *card)
123{
124 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
125
126 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
127 snd_pcm_suspend_all(pxa2xx_ac97_pcm);
128 snd_ac97_suspend(pxa2xx_ac97_ac97);
129 if (platform_ops && platform_ops->suspend)
130 platform_ops->suspend(platform_ops->priv);
131
132 return pxa2xx_ac97_hw_suspend();
133}
134
135static int pxa2xx_ac97_do_resume(struct snd_card *card)
136{
137 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
138 int rc;
139
140 rc = pxa2xx_ac97_hw_resume();
141 if (rc)
142 return rc;
143
144 if (platform_ops && platform_ops->resume)
145 platform_ops->resume(platform_ops->priv);
146 snd_ac97_resume(pxa2xx_ac97_ac97);
147 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
148
149 return 0;
150}
151
152static int pxa2xx_ac97_suspend(struct device *dev)
153{
154 struct snd_card *card = dev_get_drvdata(dev);
155 int ret = 0;
156
157 if (card)
158 ret = pxa2xx_ac97_do_suspend(card);
159
160 return ret;
161}
162
163static int pxa2xx_ac97_resume(struct device *dev)
164{
165 struct snd_card *card = dev_get_drvdata(dev);
166 int ret = 0;
167
168 if (card)
169 ret = pxa2xx_ac97_do_resume(card);
170
171 return ret;
172}
173
174static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
175#endif
176
177static int pxa2xx_ac97_probe(struct platform_device *dev)
178{
179 struct snd_card *card;
180 struct snd_ac97_bus *ac97_bus;
181 struct snd_ac97_template ac97_template;
182 int ret;
183 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
184
185 if (dev->id >= 0) {
186 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
187 ret = -ENXIO;
188 goto err_dev;
189 }
190
191 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
192 THIS_MODULE, 0, &card);
193 if (ret < 0)
194 goto err;
195
196 strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
197
198 ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
199 if (ret)
200 goto err;
201
202 ret = pxa2xx_ac97_hw_probe(dev);
203 if (ret)
204 goto err;
205
206 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
207 if (ret)
208 goto err_remove;
209 memset(&ac97_template, 0, sizeof(ac97_template));
210 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
211 if (ret)
212 goto err_remove;
213
214 snprintf(card->shortname, sizeof(card->shortname),
215 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
216 snprintf(card->longname, sizeof(card->longname),
217 "%s (%s)", dev->dev.driver->name, card->mixername);
218
219 if (pdata && pdata->codec_pdata[0])
220 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
221 ret = snd_card_register(card);
222 if (ret == 0) {
223 platform_set_drvdata(dev, card);
224 return 0;
225 }
226
227err_remove:
228 pxa2xx_ac97_hw_remove(dev);
229err:
230 if (card)
231 snd_card_free(card);
232err_dev:
233 return ret;
234}
235
236static int pxa2xx_ac97_remove(struct platform_device *dev)
237{
238 struct snd_card *card = platform_get_drvdata(dev);
239
240 if (card) {
241 snd_card_free(card);
242 pxa2xx_ac97_hw_remove(dev);
243 }
244
245 return 0;
246}
247
248static struct platform_driver pxa2xx_ac97_driver = {
249 .probe = pxa2xx_ac97_probe,
250 .remove = pxa2xx_ac97_remove,
251 .driver = {
252 .name = "pxa2xx-ac97",
253#ifdef CONFIG_PM_SLEEP
254 .pm = &pxa2xx_ac97_pm_ops,
255#endif
256 },
257};
258
259module_platform_driver(pxa2xx_ac97_driver);
260
261MODULE_AUTHOR("Nicolas Pitre");
262MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
263MODULE_LICENSE("GPL");
264MODULE_ALIAS("platform:pxa2xx-ac97");
265
