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Linux/sound/soc/pxa/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/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 
 30 #include "pxa2xx-ac97.h"
 31 
 32 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
 33 {
 34         pxa2xx_ac97_try_warm_reset(ac97);
 35 
 36         pxa2xx_ac97_finish_reset(ac97);
 37 }
 38 
 39 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
 40 {
 41         pxa2xx_ac97_try_cold_reset(ac97);
 42 
 43         pxa2xx_ac97_finish_reset(ac97);
 44 }
 45 
 46 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
 47         .read   = pxa2xx_ac97_read,
 48         .write  = pxa2xx_ac97_write,
 49         .warm_reset     = pxa2xx_ac97_warm_reset,
 50         .reset  = pxa2xx_ac97_cold_reset,
 51 };
 52 
 53 static struct pxad_param pxa2xx_ac97_pcm_stereo_in_req = {
 54         .prio = PXAD_PRIO_LOWEST,
 55         .drcmr = 11,
 56 };
 57 
 58 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
 59         .addr           = __PREG(PCDR),
 60         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
 61         .maxburst       = 32,
 62         .filter_data    = &pxa2xx_ac97_pcm_stereo_in_req,
 63 };
 64 
 65 static struct pxad_param pxa2xx_ac97_pcm_stereo_out_req = {
 66         .prio = PXAD_PRIO_LOWEST,
 67         .drcmr = 12,
 68 };
 69 
 70 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
 71         .addr           = __PREG(PCDR),
 72         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
 73         .maxburst       = 32,
 74         .filter_data    = &pxa2xx_ac97_pcm_stereo_out_req,
 75 };
 76 
 77 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_out_req = {
 78         .prio = PXAD_PRIO_LOWEST,
 79         .drcmr = 10,
 80 };
 81 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
 82         .addr           = __PREG(MODR),
 83         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 84         .maxburst       = 16,
 85         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_out_req,
 86 };
 87 
 88 static struct pxad_param pxa2xx_ac97_pcm_aux_mono_in_req = {
 89         .prio = PXAD_PRIO_LOWEST,
 90         .drcmr = 9,
 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         .maxburst       = 16,
 96         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_in_req,
 97 };
 98 
 99 static struct pxad_param pxa2xx_ac97_pcm_aux_mic_mono_req = {
100         .prio = PXAD_PRIO_LOWEST,
101         .drcmr = 8,
102 };
103 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
104         .addr           = __PREG(MCDR),
105         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
106         .maxburst       = 16,
107         .filter_data    = &pxa2xx_ac97_pcm_aux_mic_mono_req,
108 };
109 
110 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
111                                     struct snd_soc_dai *cpu_dai)
112 {
113         struct snd_dmaengine_dai_dma_data *dma_data;
114 
115         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
116                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
117         else
118                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
119 
120         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
121 
122         return 0;
123 }
124 
125 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
126                                    struct snd_soc_dai *cpu_dai)
127 {
128         struct snd_dmaengine_dai_dma_data *dma_data;
129 
130         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
131                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
132         else
133                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
134 
135         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
136 
137         return 0;
138 }
139 
140 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
141                                    struct snd_soc_dai *cpu_dai)
142 {
143         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
144                 return -ENODEV;
145         else
146                 snd_soc_dai_set_dma_data(cpu_dai, substream,
147                                          &pxa2xx_ac97_pcm_mic_mono_in);
148 
149         return 0;
150 }
151 
152 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
153                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
154                 SNDRV_PCM_RATE_48000)
155 
156 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
157         .startup        = pxa2xx_ac97_hifi_startup,
158 };
159 
160 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
161         .startup        = pxa2xx_ac97_aux_startup,
162 };
163 
164 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
165         .startup        = pxa2xx_ac97_mic_startup,
166 };
167 
168 /*
169  * There is only 1 physical AC97 interface for pxa2xx, but it
170  * has extra fifo's that can be used for aux DACs and ADCs.
171  */
172 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
173 {
174         .name = "pxa2xx-ac97",
175         .bus_control = true,
176         .playback = {
177                 .stream_name = "AC97 Playback",
178                 .channels_min = 2,
179                 .channels_max = 2,
180                 .rates = PXA2XX_AC97_RATES,
181                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
182         .capture = {
183                 .stream_name = "AC97 Capture",
184                 .channels_min = 2,
185                 .channels_max = 2,
186                 .rates = PXA2XX_AC97_RATES,
187                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
188         .ops = &pxa_ac97_hifi_dai_ops,
189 },
190 {
191         .name = "pxa2xx-ac97-aux",
192         .bus_control = true,
193         .playback = {
194                 .stream_name = "AC97 Aux Playback",
195                 .channels_min = 1,
196                 .channels_max = 1,
197                 .rates = PXA2XX_AC97_RATES,
198                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
199         .capture = {
200                 .stream_name = "AC97 Aux Capture",
201                 .channels_min = 1,
202                 .channels_max = 1,
203                 .rates = PXA2XX_AC97_RATES,
204                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
205         .ops = &pxa_ac97_aux_dai_ops,
206 },
207 {
208         .name = "pxa2xx-ac97-mic",
209         .bus_control = true,
210         .capture = {
211                 .stream_name = "AC97 Mic Capture",
212                 .channels_min = 1,
213                 .channels_max = 1,
214                 .rates = PXA2XX_AC97_RATES,
215                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
216         .ops = &pxa_ac97_mic_dai_ops,
217 },
218 };
219 
220 static const struct snd_soc_component_driver pxa_ac97_component = {
221         .name           = "pxa-ac97",
222 };
223 
224 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
225 {
226         int ret;
227 
228         if (pdev->id != -1) {
229                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
230                 return -ENXIO;
231         }
232 
233         ret = pxa2xx_ac97_hw_probe(pdev);
234         if (ret) {
235                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
236                 return ret;
237         }
238 
239         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
240         if (ret != 0)
241                 return ret;
242 
243         /* Punt most of the init to the SoC probe; we may need the machine
244          * driver to do interesting things with the clocking to get us up
245          * and running.
246          */
247         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
248                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
249 }
250 
251 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
252 {
253         snd_soc_unregister_component(&pdev->dev);
254         snd_soc_set_ac97_ops(NULL);
255         pxa2xx_ac97_hw_remove(pdev);
256         return 0;
257 }
258 
259 #ifdef CONFIG_PM_SLEEP
260 static int pxa2xx_ac97_dev_suspend(struct device *dev)
261 {
262         return pxa2xx_ac97_hw_suspend();
263 }
264 
265 static int pxa2xx_ac97_dev_resume(struct device *dev)
266 {
267         return pxa2xx_ac97_hw_resume();
268 }
269 
270 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
271                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
272 #endif
273 
274 static struct platform_driver pxa2xx_ac97_driver = {
275         .probe          = pxa2xx_ac97_dev_probe,
276         .remove         = pxa2xx_ac97_dev_remove,
277         .driver         = {
278                 .name   = "pxa2xx-ac97",
279 #ifdef CONFIG_PM_SLEEP
280                 .pm     = &pxa2xx_ac97_pm_ops,
281 #endif
282         },
283 };
284 
285 module_platform_driver(pxa2xx_ac97_driver);
286 
287 MODULE_AUTHOR("Nicolas Pitre");
288 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
289 MODULE_LICENSE("GPL");
290 

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