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 | |
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 | |
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(slot: ac97->num, reg); |
40 | if (ret < 0) |
41 | return 0; |
42 | else |
43 | return (unsigned short)(ret & 0xffff); |
44 | } |
45 | |
46 | static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97, |
47 | unsigned short reg, unsigned short val) |
48 | { |
49 | pxa2xx_ac97_write(slot: 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 | |
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 | |
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 | |
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(ac97: pxa2xx_ac97_ac97, reg, rate: runtime->rate); |
112 | } |
113 | |
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(ac97: 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 | |
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(ac97: pxa2xx_ac97_ac97); |
138 | snd_power_change_state(card, SNDRV_CTL_POWER_D0); |
139 | |
140 | return 0; |
141 | } |
142 | |
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 | |
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 | |
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, id: "PXA2xx-PCM" , device: 0, playback_count: 1, capture_count: 1, rpcm: &pcm); |
183 | if (ret) |
184 | goto out; |
185 | |
186 | ret = dma_coerce_mask_and_coherent(dev: card->dev, DMA_BIT_MASK(32)); |
187 | if (ret) |
188 | goto out; |
189 | |
190 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &pxa2xx_ac97_pcm_ops); |
191 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_CAPTURE, ops: &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 | |
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(parent: &dev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, |
218 | THIS_MODULE, extra_size: 0, card_ret: &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, num: 0, ops: &pxa2xx_ac97_ops, NULL, rbus: &ac97_bus); |
233 | if (ret) |
234 | goto err_remove; |
235 | memset(&ac97_template, 0, sizeof(ac97_template)); |
236 | ret = snd_ac97_mixer(bus: ac97_bus, template: &ac97_template, rac97: &pxa2xx_ac97_ac97); |
237 | if (ret) |
238 | goto err_remove; |
239 | |
240 | snprintf(buf: card->shortname, size: sizeof(card->shortname), |
241 | fmt: "%s" , snd_ac97_get_short_name(ac97: pxa2xx_ac97_ac97)); |
242 | snprintf(buf: card->longname, size: sizeof(card->longname), |
243 | fmt: "%s (%s)" , dev->dev.driver->name, card->mixername); |
244 | |
245 | if (pdata && pdata->codec_pdata[0]) |
246 | snd_ac97_dev_add_pdata(ac97: ac97_bus->codec[0], data: pdata->codec_pdata[0]); |
247 | ret = snd_card_register(card); |
248 | if (ret == 0) { |
249 | platform_set_drvdata(pdev: dev, data: 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 | |
262 | static void pxa2xx_ac97_remove(struct platform_device *dev) |
263 | { |
264 | struct snd_card *card = platform_get_drvdata(pdev: 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 | |