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/pxa-dma.h>
19
20 #include <sound/core.h>
21 #include <sound/ac97_codec.h>
22 #include <sound/soc.h>
23 #include <sound/pxa2xx-lib.h>
24 #include <sound/dmaengine_pcm.h>
25
26 #include <mach/hardware.h>
27 #include <mach/regs-ac97.h>
28 #include <mach/audio.h>
29
pxa2xx_ac97_warm_reset(struct snd_ac97 * ac97)30 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
31 {
32 pxa2xx_ac97_try_warm_reset();
33
34 pxa2xx_ac97_finish_reset();
35 }
36
pxa2xx_ac97_cold_reset(struct snd_ac97 * ac97)37 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
38 {
39 pxa2xx_ac97_try_cold_reset();
40
41 pxa2xx_ac97_finish_reset();
42 }
43
pxa2xx_ac97_legacy_read(struct snd_ac97 * ac97,unsigned short reg)44 static unsigned short pxa2xx_ac97_legacy_read(struct snd_ac97 *ac97,
45 unsigned short reg)
46 {
47 int ret;
48
49 ret = pxa2xx_ac97_read(ac97->num, reg);
50 if (ret < 0)
51 return 0;
52 else
53 return (unsigned short)(ret & 0xffff);
54 }
55
pxa2xx_ac97_legacy_write(struct snd_ac97 * ac97,unsigned short reg,unsigned short val)56 static void pxa2xx_ac97_legacy_write(struct snd_ac97 *ac97,
57 unsigned short reg, unsigned short val)
58 {
59 int ret;
60
61 ret = pxa2xx_ac97_write(ac97->num, reg, val);
62 }
63
64 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
65 .read = pxa2xx_ac97_legacy_read,
66 .write = pxa2xx_ac97_legacy_write,
67 .warm_reset = pxa2xx_ac97_warm_reset,
68 .reset = pxa2xx_ac97_cold_reset,
69 };
70
71 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
72 .addr = __PREG(PCDR),
73 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
74 .chan_name = "pcm_pcm_stereo_in",
75 .maxburst = 32,
76 };
77
78 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
79 .addr = __PREG(PCDR),
80 .addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
81 .chan_name = "pcm_pcm_stereo_out",
82 .maxburst = 32,
83 };
84
85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
86 .addr = __PREG(MODR),
87 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
88 .chan_name = "pcm_aux_mono_out",
89 .maxburst = 16,
90 };
91
92 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
93 .addr = __PREG(MODR),
94 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
95 .chan_name = "pcm_aux_mono_in",
96 .maxburst = 16,
97 };
98
99 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
100 .addr = __PREG(MCDR),
101 .addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
102 .chan_name = "pcm_aux_mic_mono",
103 .maxburst = 16,
104 };
105
pxa2xx_ac97_hifi_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)106 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
107 struct snd_soc_dai *cpu_dai)
108 {
109 struct snd_dmaengine_dai_dma_data *dma_data;
110
111 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
112 dma_data = &pxa2xx_ac97_pcm_stereo_out;
113 else
114 dma_data = &pxa2xx_ac97_pcm_stereo_in;
115
116 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
117
118 return 0;
119 }
120
pxa2xx_ac97_aux_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)121 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
122 struct snd_soc_dai *cpu_dai)
123 {
124 struct snd_dmaengine_dai_dma_data *dma_data;
125
126 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
127 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
128 else
129 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
130
131 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
132
133 return 0;
134 }
135
pxa2xx_ac97_mic_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)136 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
137 struct snd_soc_dai *cpu_dai)
138 {
139 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
140 return -ENODEV;
141 snd_soc_dai_set_dma_data(cpu_dai, substream,
142 &pxa2xx_ac97_pcm_mic_mono_in);
143
144 return 0;
145 }
146
147 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
148 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
149 SNDRV_PCM_RATE_48000)
150
151 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
152 .startup = pxa2xx_ac97_hifi_startup,
153 };
154
155 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
156 .startup = pxa2xx_ac97_aux_startup,
157 };
158
159 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
160 .startup = pxa2xx_ac97_mic_startup,
161 };
162
163 /*
164 * There is only 1 physical AC97 interface for pxa2xx, but it
165 * has extra fifo's that can be used for aux DACs and ADCs.
166 */
167 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
168 {
169 .name = "pxa2xx-ac97",
170 .bus_control = true,
171 .playback = {
172 .stream_name = "AC97 Playback",
173 .channels_min = 2,
174 .channels_max = 2,
175 .rates = PXA2XX_AC97_RATES,
176 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
177 .capture = {
178 .stream_name = "AC97 Capture",
179 .channels_min = 2,
180 .channels_max = 2,
181 .rates = PXA2XX_AC97_RATES,
182 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
183 .ops = &pxa_ac97_hifi_dai_ops,
184 },
185 {
186 .name = "pxa2xx-ac97-aux",
187 .bus_control = true,
188 .playback = {
189 .stream_name = "AC97 Aux Playback",
190 .channels_min = 1,
191 .channels_max = 1,
192 .rates = PXA2XX_AC97_RATES,
193 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
194 .capture = {
195 .stream_name = "AC97 Aux Capture",
196 .channels_min = 1,
197 .channels_max = 1,
198 .rates = PXA2XX_AC97_RATES,
199 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
200 .ops = &pxa_ac97_aux_dai_ops,
201 },
202 {
203 .name = "pxa2xx-ac97-mic",
204 .bus_control = true,
205 .capture = {
206 .stream_name = "AC97 Mic Capture",
207 .channels_min = 1,
208 .channels_max = 1,
209 .rates = PXA2XX_AC97_RATES,
210 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
211 .ops = &pxa_ac97_mic_dai_ops,
212 },
213 };
214
215 static const struct snd_soc_component_driver pxa_ac97_component = {
216 .name = "pxa-ac97",
217 .ops = &pxa2xx_pcm_ops,
218 .pcm_new = pxa2xx_soc_pcm_new,
219 .pcm_free = pxa2xx_pcm_free_dma_buffers,
220 };
221
222 #ifdef CONFIG_OF
223 static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
224 { .compatible = "marvell,pxa250-ac97", },
225 { .compatible = "marvell,pxa270-ac97", },
226 { .compatible = "marvell,pxa300-ac97", },
227 { }
228 };
229 MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);
230
231 #endif
232
pxa2xx_ac97_dev_probe(struct platform_device * pdev)233 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
234 {
235 int ret;
236
237 if (pdev->id != -1) {
238 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
239 return -ENXIO;
240 }
241
242 ret = pxa2xx_ac97_hw_probe(pdev);
243 if (ret) {
244 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
245 return ret;
246 }
247
248 ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
249 if (ret != 0)
250 return ret;
251
252 /* Punt most of the init to the SoC probe; we may need the machine
253 * driver to do interesting things with the clocking to get us up
254 * and running.
255 */
256 return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
257 pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
258 }
259
pxa2xx_ac97_dev_remove(struct platform_device * pdev)260 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
261 {
262 snd_soc_unregister_component(&pdev->dev);
263 snd_soc_set_ac97_ops(NULL);
264 pxa2xx_ac97_hw_remove(pdev);
265 return 0;
266 }
267
268 #ifdef CONFIG_PM_SLEEP
pxa2xx_ac97_dev_suspend(struct device * dev)269 static int pxa2xx_ac97_dev_suspend(struct device *dev)
270 {
271 return pxa2xx_ac97_hw_suspend();
272 }
273
pxa2xx_ac97_dev_resume(struct device * dev)274 static int pxa2xx_ac97_dev_resume(struct device *dev)
275 {
276 return pxa2xx_ac97_hw_resume();
277 }
278
279 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
280 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
281 #endif
282
283 static struct platform_driver pxa2xx_ac97_driver = {
284 .probe = pxa2xx_ac97_dev_probe,
285 .remove = pxa2xx_ac97_dev_remove,
286 .driver = {
287 .name = "pxa2xx-ac97",
288 #ifdef CONFIG_PM_SLEEP
289 .pm = &pxa2xx_ac97_pm_ops,
290 #endif
291 .of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
292 },
293 };
294
295 module_platform_driver(pxa2xx_ac97_driver);
296
297 MODULE_AUTHOR("Nicolas Pitre");
298 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
299 MODULE_LICENSE("GPL");
300 MODULE_ALIAS("platform:pxa2xx-ac97");
301
