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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 
 19 #include <sound/core.h>
 20 #include <sound/ac97_codec.h>
 21 #include <sound/soc.h>
 22 #include <sound/pxa2xx-lib.h>
 23 #include <sound/dmaengine_pcm.h>
 24 
 25 #include <mach/hardware.h>
 26 #include <mach/regs-ac97.h>
 27 #include <mach/audio.h>
 28 
 29 #include "pxa2xx-ac97.h"
 30 
 31 static void pxa2xx_ac97_warm_reset(struct snd_ac97 *ac97)
 32 {
 33         pxa2xx_ac97_try_warm_reset(ac97);
 34 
 35         pxa2xx_ac97_finish_reset(ac97);
 36 }
 37 
 38 static void pxa2xx_ac97_cold_reset(struct snd_ac97 *ac97)
 39 {
 40         pxa2xx_ac97_try_cold_reset(ac97);
 41 
 42         pxa2xx_ac97_finish_reset(ac97);
 43 }
 44 
 45 static struct snd_ac97_bus_ops pxa2xx_ac97_ops = {
 46         .read   = pxa2xx_ac97_read,
 47         .write  = pxa2xx_ac97_write,
 48         .warm_reset     = pxa2xx_ac97_warm_reset,
 49         .reset  = pxa2xx_ac97_cold_reset,
 50 };
 51 
 52 static unsigned long pxa2xx_ac97_pcm_stereo_in_req = 12;
 53 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
 54         .addr           = __PREG(PCDR),
 55         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
 56         .maxburst       = 32,
 57         .filter_data    = &pxa2xx_ac97_pcm_stereo_in_req,
 58 };
 59 
 60 static unsigned long pxa2xx_ac97_pcm_stereo_out_req = 11;
 61 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
 62         .addr           = __PREG(PCDR),
 63         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
 64         .maxburst       = 32,
 65         .filter_data    = &pxa2xx_ac97_pcm_stereo_out_req,
 66 };
 67 
 68 static unsigned long pxa2xx_ac97_pcm_aux_mono_out_req = 10;
 69 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
 70         .addr           = __PREG(MODR),
 71         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 72         .maxburst       = 16,
 73         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_out_req,
 74 };
 75 
 76 static unsigned long pxa2xx_ac97_pcm_aux_mono_in_req = 9;
 77 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
 78         .addr           = __PREG(MODR),
 79         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 80         .maxburst       = 16,
 81         .filter_data    = &pxa2xx_ac97_pcm_aux_mono_in_req,
 82 };
 83 
 84 static unsigned long pxa2xx_ac97_pcm_aux_mic_mono_req = 8;
 85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
 86         .addr           = __PREG(MCDR),
 87         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 88         .maxburst       = 16,
 89         .filter_data    = &pxa2xx_ac97_pcm_aux_mic_mono_req,
 90 };
 91 
 92 static int pxa2xx_ac97_hw_params(struct snd_pcm_substream *substream,
 93                                  struct snd_pcm_hw_params *params,
 94                                  struct snd_soc_dai *cpu_dai)
 95 {
 96         struct snd_dmaengine_dai_dma_data *dma_data;
 97 
 98         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 99                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
100         else
101                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
102 
103         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
104 
105         return 0;
106 }
107 
108 static int pxa2xx_ac97_hw_aux_params(struct snd_pcm_substream *substream,
109                                      struct snd_pcm_hw_params *params,
110                                      struct snd_soc_dai *cpu_dai)
111 {
112         struct snd_dmaengine_dai_dma_data *dma_data;
113 
114         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
115                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
116         else
117                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
118 
119         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
120 
121         return 0;
122 }
123 
124 static int pxa2xx_ac97_hw_mic_params(struct snd_pcm_substream *substream,
125                                      struct snd_pcm_hw_params *params,
126                                      struct snd_soc_dai *cpu_dai)
127 {
128         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
129                 return -ENODEV;
130         else
131                 snd_soc_dai_set_dma_data(cpu_dai, substream,
132                                          &pxa2xx_ac97_pcm_mic_mono_in);
133 
134         return 0;
135 }
136 
137 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
138                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
139                 SNDRV_PCM_RATE_48000)
140 
141 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
142         .hw_params      = pxa2xx_ac97_hw_params,
143 };
144 
145 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
146         .hw_params      = pxa2xx_ac97_hw_aux_params,
147 };
148 
149 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
150         .hw_params      = pxa2xx_ac97_hw_mic_params,
151 };
152 
153 /*
154  * There is only 1 physical AC97 interface for pxa2xx, but it
155  * has extra fifo's that can be used for aux DACs and ADCs.
156  */
157 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
158 {
159         .name = "pxa2xx-ac97",
160         .ac97_control = 1,
161         .playback = {
162                 .stream_name = "AC97 Playback",
163                 .channels_min = 2,
164                 .channels_max = 2,
165                 .rates = PXA2XX_AC97_RATES,
166                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
167         .capture = {
168                 .stream_name = "AC97 Capture",
169                 .channels_min = 2,
170                 .channels_max = 2,
171                 .rates = PXA2XX_AC97_RATES,
172                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
173         .ops = &pxa_ac97_hifi_dai_ops,
174 },
175 {
176         .name = "pxa2xx-ac97-aux",
177         .ac97_control = 1,
178         .playback = {
179                 .stream_name = "AC97 Aux Playback",
180                 .channels_min = 1,
181                 .channels_max = 1,
182                 .rates = PXA2XX_AC97_RATES,
183                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
184         .capture = {
185                 .stream_name = "AC97 Aux Capture",
186                 .channels_min = 1,
187                 .channels_max = 1,
188                 .rates = PXA2XX_AC97_RATES,
189                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
190         .ops = &pxa_ac97_aux_dai_ops,
191 },
192 {
193         .name = "pxa2xx-ac97-mic",
194         .ac97_control = 1,
195         .capture = {
196                 .stream_name = "AC97 Mic Capture",
197                 .channels_min = 1,
198                 .channels_max = 1,
199                 .rates = PXA2XX_AC97_RATES,
200                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
201         .ops = &pxa_ac97_mic_dai_ops,
202 },
203 };
204 
205 static const struct snd_soc_component_driver pxa_ac97_component = {
206         .name           = "pxa-ac97",
207 };
208 
209 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
210 {
211         int ret;
212 
213         if (pdev->id != -1) {
214                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
215                 return -ENXIO;
216         }
217 
218         ret = pxa2xx_ac97_hw_probe(pdev);
219         if (ret) {
220                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
221                 return ret;
222         }
223 
224         ret = snd_soc_set_ac97_ops(&pxa2xx_ac97_ops);
225         if (ret != 0)
226                 return ret;
227 
228         /* Punt most of the init to the SoC probe; we may need the machine
229          * driver to do interesting things with the clocking to get us up
230          * and running.
231          */
232         return snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
233                                           pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
234 }
235 
236 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
237 {
238         snd_soc_unregister_component(&pdev->dev);
239         snd_soc_set_ac97_ops(NULL);
240         pxa2xx_ac97_hw_remove(pdev);
241         return 0;
242 }
243 
244 #ifdef CONFIG_PM_SLEEP
245 static int pxa2xx_ac97_dev_suspend(struct device *dev)
246 {
247         return pxa2xx_ac97_hw_suspend();
248 }
249 
250 static int pxa2xx_ac97_dev_resume(struct device *dev)
251 {
252         return pxa2xx_ac97_hw_resume();
253 }
254 
255 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
256                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
257 #endif
258 
259 static struct platform_driver pxa2xx_ac97_driver = {
260         .probe          = pxa2xx_ac97_dev_probe,
261         .remove         = pxa2xx_ac97_dev_remove,
262         .driver         = {
263                 .name   = "pxa2xx-ac97",
264                 .owner  = THIS_MODULE,
265 #ifdef CONFIG_PM_SLEEP
266                 .pm     = &pxa2xx_ac97_pm_ops,
267 #endif
268         },
269 };
270 
271 module_platform_driver(pxa2xx_ac97_driver);
272 
273 MODULE_AUTHOR("Nicolas Pitre");
274 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
275 MODULE_LICENSE("GPL");
276 

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