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Linux/sound/soc/pxa/pxa2xx-ac97.c

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  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/ac97/controller.h>
 21 #include <sound/core.h>
 22 #include <sound/ac97_codec.h>
 23 #include <sound/soc.h>
 24 #include <sound/pxa2xx-lib.h>
 25 #include <sound/dmaengine_pcm.h>
 26 
 27 #include <mach/hardware.h>
 28 #include <mach/regs-ac97.h>
 29 #include <mach/audio.h>
 30 
 31 static void pxa2xx_ac97_warm_reset(struct ac97_controller *adrv)
 32 {
 33         pxa2xx_ac97_try_warm_reset();
 34 
 35         pxa2xx_ac97_finish_reset();
 36 }
 37 
 38 static void pxa2xx_ac97_cold_reset(struct ac97_controller *adrv)
 39 {
 40         pxa2xx_ac97_try_cold_reset();
 41 
 42         pxa2xx_ac97_finish_reset();
 43 }
 44 
 45 static int pxa2xx_ac97_read_actrl(struct ac97_controller *adrv, int slot,
 46                                   unsigned short reg)
 47 {
 48         return pxa2xx_ac97_read(slot, reg);
 49 }
 50 
 51 static int pxa2xx_ac97_write_actrl(struct ac97_controller *adrv, int slot,
 52                                    unsigned short reg, unsigned short val)
 53 {
 54         return pxa2xx_ac97_write(slot, reg, val);
 55 }
 56 
 57 static struct ac97_controller_ops pxa2xx_ac97_ops = {
 58         .read   = pxa2xx_ac97_read_actrl,
 59         .write  = pxa2xx_ac97_write_actrl,
 60         .warm_reset     = pxa2xx_ac97_warm_reset,
 61         .reset  = pxa2xx_ac97_cold_reset,
 62 };
 63 
 64 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
 65         .addr           = __PREG(PCDR),
 66         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
 67         .chan_name      = "pcm_pcm_stereo_in",
 68         .maxburst       = 32,
 69 };
 70 
 71 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
 72         .addr           = __PREG(PCDR),
 73         .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
 74         .chan_name      = "pcm_pcm_stereo_out",
 75         .maxburst       = 32,
 76 };
 77 
 78 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
 79         .addr           = __PREG(MODR),
 80         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 81         .chan_name      = "pcm_aux_mono_out",
 82         .maxburst       = 16,
 83 };
 84 
 85 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
 86         .addr           = __PREG(MODR),
 87         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 88         .chan_name      = "pcm_aux_mono_in",
 89         .maxburst       = 16,
 90 };
 91 
 92 static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
 93         .addr           = __PREG(MCDR),
 94         .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
 95         .chan_name      = "pcm_aux_mic_mono",
 96         .maxburst       = 16,
 97 };
 98 
 99 static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
100                                     struct snd_soc_dai *cpu_dai)
101 {
102         struct snd_dmaengine_dai_dma_data *dma_data;
103 
104         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
105                 dma_data = &pxa2xx_ac97_pcm_stereo_out;
106         else
107                 dma_data = &pxa2xx_ac97_pcm_stereo_in;
108 
109         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
110 
111         return 0;
112 }
113 
114 static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
115                                    struct snd_soc_dai *cpu_dai)
116 {
117         struct snd_dmaengine_dai_dma_data *dma_data;
118 
119         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
120                 dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
121         else
122                 dma_data = &pxa2xx_ac97_pcm_aux_mono_in;
123 
124         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
125 
126         return 0;
127 }
128 
129 static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
130                                    struct snd_soc_dai *cpu_dai)
131 {
132         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
133                 return -ENODEV;
134         snd_soc_dai_set_dma_data(cpu_dai, substream,
135                                  &pxa2xx_ac97_pcm_mic_mono_in);
136 
137         return 0;
138 }
139 
140 #define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
141                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
142                 SNDRV_PCM_RATE_48000)
143 
144 static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
145         .startup        = pxa2xx_ac97_hifi_startup,
146 };
147 
148 static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
149         .startup        = pxa2xx_ac97_aux_startup,
150 };
151 
152 static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
153         .startup        = pxa2xx_ac97_mic_startup,
154 };
155 
156 /*
157  * There is only 1 physical AC97 interface for pxa2xx, but it
158  * has extra fifo's that can be used for aux DACs and ADCs.
159  */
160 static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
161 {
162         .name = "pxa2xx-ac97",
163         .bus_control = true,
164         .playback = {
165                 .stream_name = "AC97 Playback",
166                 .channels_min = 2,
167                 .channels_max = 2,
168                 .rates = PXA2XX_AC97_RATES,
169                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
170         .capture = {
171                 .stream_name = "AC97 Capture",
172                 .channels_min = 2,
173                 .channels_max = 2,
174                 .rates = PXA2XX_AC97_RATES,
175                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
176         .ops = &pxa_ac97_hifi_dai_ops,
177 },
178 {
179         .name = "pxa2xx-ac97-aux",
180         .bus_control = true,
181         .playback = {
182                 .stream_name = "AC97 Aux Playback",
183                 .channels_min = 1,
184                 .channels_max = 1,
185                 .rates = PXA2XX_AC97_RATES,
186                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
187         .capture = {
188                 .stream_name = "AC97 Aux Capture",
189                 .channels_min = 1,
190                 .channels_max = 1,
191                 .rates = PXA2XX_AC97_RATES,
192                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
193         .ops = &pxa_ac97_aux_dai_ops,
194 },
195 {
196         .name = "pxa2xx-ac97-mic",
197         .bus_control = true,
198         .capture = {
199                 .stream_name = "AC97 Mic Capture",
200                 .channels_min = 1,
201                 .channels_max = 1,
202                 .rates = PXA2XX_AC97_RATES,
203                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
204         .ops = &pxa_ac97_mic_dai_ops,
205 },
206 };
207 
208 static const struct snd_soc_component_driver pxa_ac97_component = {
209         .name           = "pxa-ac97",
210         .ops            = &pxa2xx_pcm_ops,
211         .pcm_new        = pxa2xx_soc_pcm_new,
212         .pcm_free       = pxa2xx_pcm_free_dma_buffers,
213 };
214 
215 #ifdef CONFIG_OF
216 static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
217         { .compatible = "marvell,pxa250-ac97", },
218         { .compatible = "marvell,pxa270-ac97", },
219         { .compatible = "marvell,pxa300-ac97", },
220         { }
221 };
222 MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);
223 
224 #endif
225 
226 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
227 {
228         int ret;
229         struct ac97_controller *ctrl;
230         pxa2xx_audio_ops_t *pdata = pdev->dev.platform_data;
231         void **codecs_pdata;
232 
233         if (pdev->id != -1) {
234                 dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
235                 return -ENXIO;
236         }
237 
238         ret = pxa2xx_ac97_hw_probe(pdev);
239         if (ret) {
240                 dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
241                 return ret;
242         }
243 
244         codecs_pdata = pdata ? pdata->codec_pdata : NULL;
245         ctrl = snd_ac97_controller_register(&pxa2xx_ac97_ops, &pdev->dev,
246                                             AC97_SLOTS_AVAILABLE_ALL,
247                                             codecs_pdata);
248         if (IS_ERR(ctrl))
249                 return PTR_ERR(ctrl);
250 
251         platform_set_drvdata(pdev, ctrl);
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 
260 static int pxa2xx_ac97_dev_remove(struct platform_device *pdev)
261 {
262         struct ac97_controller *ctrl = platform_get_drvdata(pdev);
263 
264         snd_soc_unregister_component(&pdev->dev);
265         snd_ac97_controller_unregister(ctrl);
266         pxa2xx_ac97_hw_remove(pdev);
267         return 0;
268 }
269 
270 #ifdef CONFIG_PM_SLEEP
271 static int pxa2xx_ac97_dev_suspend(struct device *dev)
272 {
273         return pxa2xx_ac97_hw_suspend();
274 }
275 
276 static int pxa2xx_ac97_dev_resume(struct device *dev)
277 {
278         return pxa2xx_ac97_hw_resume();
279 }
280 
281 static SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
282                 pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);
283 #endif
284 
285 static struct platform_driver pxa2xx_ac97_driver = {
286         .probe          = pxa2xx_ac97_dev_probe,
287         .remove         = pxa2xx_ac97_dev_remove,
288         .driver         = {
289                 .name   = "pxa2xx-ac97",
290 #ifdef CONFIG_PM_SLEEP
291                 .pm     = &pxa2xx_ac97_pm_ops,
292 #endif
293                 .of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
294         },
295 };
296 
297 module_platform_driver(pxa2xx_ac97_driver);
298 
299 MODULE_AUTHOR("Nicolas Pitre");
300 MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
301 MODULE_LICENSE("GPL");
302 MODULE_ALIAS("platform:pxa2xx-ac97");
303 

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