1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
4 *
5 * Author: Nicolas Pitre
6 * Created: Dec 02, 2004
7 * Copyright: MontaVista Software Inc.
8 */
9
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 <linux/platform_data/asoc-pxa.h>
25
pxa2xx_ac97_legacy_reset(struct snd_ac97 * ac97)26 static void pxa2xx_ac97_legacy_reset(struct snd_ac97 *ac97)
27 {
28 if (!pxa2xx_ac97_try_cold_reset())
29 pxa2xx_ac97_try_warm_reset();
30
31 pxa2xx_ac97_finish_reset();
32 }
33
pxa2xx_ac97_legacy_read(struct snd_ac97 * ac97,unsigned short reg)34 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
35 unsigned short reg)
36 {
37 int ret;
38
39 ret = pxa2xx_ac97_read(ac97->num, reg);
40 if (ret < 0)
41 return 0;
42 else
43 return (unsigned short)(ret & 0xffff);
44 }
45
pxa2xx_ac97_legacy_write(struct snd_ac97 * ac97,unsigned short reg,unsigned short val)46 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
47 unsigned short reg, unsigned short val)
48 {
49 pxa2xx_ac97_write(ac97->num, reg, val);
50 }
51
52 static const struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
53 .read = pxa2xx_ac97_legacy_read,
54 .write = pxa2xx_ac97_legacy_write,
55 .reset = pxa2xx_ac97_legacy_reset,
56 };
57
58 static struct snd_pcm *pxa2xx_ac97_pcm;
59 static struct snd_ac97 *pxa2xx_ac97_ac97;
60
pxa2xx_ac97_pcm_open(struct snd_pcm_substream * substream)61 static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
62 {
63 struct snd_pcm_runtime *runtime = substream->runtime;
64 pxa2xx_audio_ops_t *platform_ops;
65 int ret, i;
66
67 ret = pxa2xx_pcm_open(substream);
68 if (ret)
69 return ret;
70
71 runtime->hw.channels_min = 2;
72 runtime->hw.channels_max = 2;
73
74 i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
75 AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
76 runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
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 ret = platform_ops->startup(substream, platform_ops->priv);
82 if (ret < 0)
83 pxa2xx_pcm_close(substream);
84 }
85
86 return ret;
87 }
88
pxa2xx_ac97_pcm_close(struct snd_pcm_substream * substream)89 static int pxa2xx_ac97_pcm_close(struct snd_pcm_substream *substream)
90 {
91 pxa2xx_audio_ops_t *platform_ops;
92
93 platform_ops = substream->pcm->card->dev->platform_data;
94 if (platform_ops && platform_ops->shutdown)
95 platform_ops->shutdown(substream, platform_ops->priv);
96
97 return 0;
98 }
99
pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream * substream)100 static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream)
101 {
102 struct snd_pcm_runtime *runtime = substream->runtime;
103 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
104 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
105 int ret;
106
107 ret = pxa2xx_pcm_prepare(substream);
108 if (ret < 0)
109 return ret;
110
111 return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
112 }
113
pxa2xx_ac97_do_suspend(struct snd_card * card)114 static int pxa2xx_ac97_do_suspend(struct snd_card *card)
115 {
116 pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
117
118 snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
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
pxa2xx_ac97_do_resume(struct snd_card * card)126 static 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
pxa2xx_ac97_suspend(struct device * dev)143 static 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
pxa2xx_ac97_resume(struct device * dev)154 static 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
165 static DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops, pxa2xx_ac97_suspend, pxa2xx_ac97_resume);
166
167 static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
168 .open = pxa2xx_ac97_pcm_open,
169 .close = pxa2xx_ac97_pcm_close,
170 .hw_params = pxa2xx_pcm_hw_params,
171 .prepare = pxa2xx_ac97_pcm_prepare,
172 .trigger = pxa2xx_pcm_trigger,
173 .pointer = pxa2xx_pcm_pointer,
174 };
175
176
pxa2xx_ac97_pcm_new(struct snd_card * card)177 static int pxa2xx_ac97_pcm_new(struct snd_card *card)
178 {
179 struct snd_pcm *pcm;
180 int ret;
181
182 ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
183 if (ret)
184 goto out;
185
186 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
187 if (ret)
188 goto out;
189
190 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops);
191 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops);
192 ret = pxa2xx_pcm_preallocate_dma_buffer(pcm);
193 if (ret)
194 goto out;
195
196 pxa2xx_ac97_pcm = pcm;
197 ret = 0;
198
199 out:
200 return ret;
201 }
202
pxa2xx_ac97_probe(struct platform_device * dev)203 static int pxa2xx_ac97_probe(struct platform_device *dev)
204 {
205 struct snd_card *card;
206 struct snd_ac97_bus *ac97_bus;
207 struct snd_ac97_template ac97_template;
208 int ret;
209 pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
210
211 if (dev->id >= 0) {
212 dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
213 ret = -ENXIO;
214 goto err_dev;
215 }
216
217 ret = snd_card_new(&dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
218 THIS_MODULE, 0, &card);
219 if (ret < 0)
220 goto err;
221
222 strscpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
223
224 ret = pxa2xx_ac97_pcm_new(card);
225 if (ret)
226 goto err;
227
228 ret = pxa2xx_ac97_hw_probe(dev);
229 if (ret)
230 goto err;
231
232 ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
233 if (ret)
234 goto err_remove;
235 memset(&ac97_template, 0, sizeof(ac97_template));
236 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
237 if (ret)
238 goto err_remove;
239
240 snprintf(card->shortname, sizeof(card->shortname),
241 "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
242 snprintf(card->longname, sizeof(card->longname),
243 "%s (%s)", dev->dev.driver->name, card->mixername);
244
245 if (pdata && pdata->codec_pdata[0])
246 snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata[0]);
247 ret = snd_card_register(card);
248 if (ret == 0) {
249 platform_set_drvdata(dev, card);
250 return 0;
251 }
252
253 err_remove:
254 pxa2xx_ac97_hw_remove(dev);
255 err:
256 if (card)
257 snd_card_free(card);
258 err_dev:
259 return ret;
260 }
261
pxa2xx_ac97_remove(struct platform_device * dev)262 static void pxa2xx_ac97_remove(struct platform_device *dev)
263 {
264 struct snd_card *card = platform_get_drvdata(dev);
265
266 if (card) {
267 snd_card_free(card);
268 pxa2xx_ac97_hw_remove(dev);
269 }
270 }
271
272 static struct platform_driver pxa2xx_ac97_driver = {
273 .probe = pxa2xx_ac97_probe,
274 .remove_new = pxa2xx_ac97_remove,
275 .driver = {
276 .name = "pxa2xx-ac97",
277 .pm = &pxa2xx_ac97_pm_ops,
278 },
279 };
280
281 module_platform_driver(pxa2xx_ac97_driver);
282
283 MODULE_AUTHOR("Nicolas Pitre");
284 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
285 MODULE_LICENSE("GPL");
286 MODULE_ALIAS("platform:pxa2xx-ac97");
287