xref: /linux/sound/arm/pxa2xx-ac97.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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