GNU Linux-libre 4.19.314-gnu1
[releases.git] / sound / arm / pxa2xx-ac97.c
1 /*
2  * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
3  *
4  * Author:      Nicolas Pitre
5  * Created:     Dec 02, 2004
6  * Copyright:   MontaVista Software Inc.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12
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-mapping.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 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
31 {
32         if (!pxa2xx_ac97_try_cold_reset())
33                 pxa2xx_ac97_try_warm_reset();
34
35         pxa2xx_ac97_finish_reset();
36 }
37
38 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
39                                               unsigned short reg)
40 {
41         int ret;
42
43         ret = pxa2xx_ac97_read(ac97->num, reg);
44         if (ret < 0)
45                 return 0;
46         else
47                 return (unsigned short)(ret & 0xffff);
48 }
49
50 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
51                                      unsigned short reg, unsigned short val)
52 {
53         int __always_unused ret;
54
55         ret = pxa2xx_ac97_write(ac97->num, reg, val);
56 }
57
58 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
59         .read   = pxa2xx_ac97_legacy_read,
60         .write  = pxa2xx_ac97_legacy_write,
61         .reset  = pxa2xx_ac97_legacy_reset,
62 };
63
64 static struct snd_pcm *pxa2xx_ac97_pcm;
65 static struct snd_ac97 *pxa2xx_ac97_ac97;
66
67 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
68 {
69         struct snd_pcm_runtime *runtime = substream->runtime;
70         pxa2xx_audio_ops_t *platform_ops;
71         int ret, i;
72
73         ret = pxa2xx_pcm_open(substream);
74         if (ret)
75                 return ret;
76
77         runtime->hw.channels_min = 2;
78         runtime->hw.channels_max = 2;
79
80         i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
81                 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
82         runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
83         snd_pcm_limit_hw_rates(runtime);
84
85         platform_ops = substream->pcm->card->dev->platform_data;
86         if (platform_ops && platform_ops->startup) {
87                 ret = platform_ops->startup(substream, platform_ops->priv);
88                 if (ret < 0)
89                         pxa2xx_pcm_close(substream);
90         }
91
92         return ret;
93 }
94
95 static int pxa2xx_ac97_pcm_close(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         return 0;
104 }
105
106 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
107 {
108         struct snd_pcm_runtime *runtime = substream->runtime;
109         int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
110                   AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
111         int ret;
112
113         ret = pxa2xx_pcm_prepare(substream);
114         if (ret < 0)
115                 return ret;
116
117         return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
118 }
119
120 #ifdef CONFIG_PM_SLEEP
121
122 static 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
135 static 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
152 static 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
163 static 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
174 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
175 #endif
176
177 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
178         .open           = pxa2xx_ac97_pcm_open,
179         .close          = pxa2xx_ac97_pcm_close,
180         .ioctl          = snd_pcm_lib_ioctl,
181         .hw_params      = pxa2xx_pcm_hw_params,
182         .hw_free        = pxa2xx_pcm_hw_free,
183         .prepare        = pxa2xx_ac97_pcm_prepare,
184         .trigger        = pxa2xx_pcm_trigger,
185         .pointer        = pxa2xx_pcm_pointer,
186         .mmap           = pxa2xx_pcm_mmap,
187 };
188
189
190 static int pxa2xx_ac97_pcm_new(struct snd_card *card)
191 {
192         struct snd_pcm *pcm;
193         int stream, ret;
194
195         ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
196         if (ret)
197                 goto out;
198
199         pcm->private_free = pxa2xx_pcm_free_dma_buffers;
200
201         ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
202         if (ret)
203                 goto out;
204
205         stream = SNDRV_PCM_STREAM_PLAYBACK;
206         snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
207         ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
208         if (ret)
209                 goto out;
210
211         stream = SNDRV_PCM_STREAM_CAPTURE;
212         snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
213         ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
214         if (ret)
215                 goto out;
216
217         pxa2xx_ac97_pcm = pcm;
218         ret = 0;
219
220  out:
221         return ret;
222 }
223
224 static int pxa2xx_ac97_probe(struct platform_device *dev)
225 {
226         struct snd_card *card;
227         struct snd_ac97_bus *ac97_bus;
228         struct snd_ac97_template ac97_template;
229         int ret;
230         pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
231
232         if (dev->id >= 0) {
233                 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
234                 ret = -ENXIO;
235                 goto err_dev;
236         }
237
238         ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
239                            THIS_MODULE, 0, &card);
240         if (ret < 0)
241                 goto err;
242
243         strlcpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
244
245         ret = pxa2xx_ac97_pcm_new(card);
246         if (ret)
247                 goto err;
248
249         ret = pxa2xx_ac97_hw_probe(dev);
250         if (ret)
251                 goto err;
252
253         ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
254         if (ret)
255                 goto err_remove;
256         memset(&ac97_template, 0, sizeof(ac97_template));
257         ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
258         if (ret)
259                 goto err_remove;
260
261         snprintf(card->shortname, sizeof(card->shortname),
262                  "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
263         snprintf(card->longname, sizeof(card->longname),
264                  "%s (%s)", dev->dev.driver->name, card->mixername);
265
266         if (pdata && pdata->codec_pdata[0])
267                 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
268         ret = snd_card_register(card);
269         if (ret == 0) {
270                 platform_set_drvdata(dev, card);
271                 return 0;
272         }
273
274 err_remove:
275         pxa2xx_ac97_hw_remove(dev);
276 err:
277         if (card)
278                 snd_card_free(card);
279 err_dev:
280         return ret;
281 }
282
283 static int pxa2xx_ac97_remove(struct platform_device *dev)
284 {
285         struct snd_card *card = platform_get_drvdata(dev);
286
287         if (card) {
288                 snd_card_free(card);
289                 pxa2xx_ac97_hw_remove(dev);
290         }
291
292         return 0;
293 }
294
295 static struct platform_driver pxa2xx_ac97_driver = {
296         .probe          = pxa2xx_ac97_probe,
297         .remove         = pxa2xx_ac97_remove,
298         .driver         = {
299                 .name   = "pxa2xx-ac97",
300 #ifdef CONFIG_PM_SLEEP
301                 .pm     = &pxa2xx_ac97_pm_ops,
302 #endif
303         },
304 };
305
306 module_platform_driver(pxa2xx_ac97_driver);
307
308 MODULE_AUTHOR("Nicolas Pitre");
309 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
310 MODULE_LICENSE("GPL");
311 MODULE_ALIAS("platform:pxa2xx-ac97");