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Linux/sound/soc/blackfin/bf5xx-i2s.c

  1 /*
  2  * File:         sound/soc/blackfin/bf5xx-i2s.c
  3  * Author:       Cliff Cai <Cliff.Cai@analog.com>
  4  *
  5  * Created:      Tue June 06 2008
  6  * Description:  Blackfin I2S CPU DAI driver
  7  *
  8  * Modified:
  9  *               Copyright 2008 Analog Devices Inc.
 10  *
 11  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 12  *
 13  * This program is free software; you can redistribute it and/or modify
 14  * it under the terms of the GNU General Public License as published by
 15  * the Free Software Foundation; either version 2 of the License, or
 16  * (at your option) any later version.
 17  *
 18  * This program is distributed in the hope that it will be useful,
 19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 21  * GNU General Public License for more details.
 22  *
 23  * You should have received a copy of the GNU General Public License
 24  * along with this program; if not, see the file COPYING, or write
 25  * to the Free Software Foundation, Inc.,
 26  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 27  */
 28 
 29 #include <linux/init.h>
 30 #include <linux/module.h>
 31 #include <linux/device.h>
 32 #include <linux/delay.h>
 33 #include <sound/core.h>
 34 #include <sound/pcm.h>
 35 #include <sound/pcm_params.h>
 36 #include <sound/initval.h>
 37 #include <sound/soc.h>
 38 
 39 #include <asm/irq.h>
 40 #include <asm/portmux.h>
 41 #include <linux/mutex.h>
 42 #include <linux/gpio.h>
 43 
 44 #include "bf5xx-sport.h"
 45 #include "bf5xx-i2s-pcm.h"
 46 
 47 struct bf5xx_i2s_port {
 48         u16 tcr1;
 49         u16 rcr1;
 50         u16 tcr2;
 51         u16 rcr2;
 52         int configured;
 53 
 54         unsigned int slots;
 55         unsigned int tx_mask;
 56         unsigned int rx_mask;
 57 
 58         struct bf5xx_i2s_pcm_data tx_dma_data;
 59         struct bf5xx_i2s_pcm_data rx_dma_data;
 60 };
 61 
 62 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 63                 unsigned int fmt)
 64 {
 65         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
 66         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 67         int ret = 0;
 68 
 69         /* interface format:support I2S,slave mode */
 70         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 71         case SND_SOC_DAIFMT_I2S:
 72                 bf5xx_i2s->tcr1 |= TFSR | TCKFE;
 73                 bf5xx_i2s->rcr1 |= RFSR | RCKFE;
 74                 bf5xx_i2s->tcr2 |= TSFSE;
 75                 bf5xx_i2s->rcr2 |= RSFSE;
 76                 break;
 77         case SND_SOC_DAIFMT_DSP_A:
 78                 bf5xx_i2s->tcr1 |= TFSR;
 79                 bf5xx_i2s->rcr1 |= RFSR;
 80                 break;
 81         case SND_SOC_DAIFMT_LEFT_J:
 82                 ret = -EINVAL;
 83                 break;
 84         default:
 85                 dev_err(cpu_dai->dev, "%s: Unknown DAI format type\n",
 86                         __func__);
 87                 ret = -EINVAL;
 88                 break;
 89         }
 90 
 91         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 92         case SND_SOC_DAIFMT_CBM_CFM:
 93                 break;
 94         case SND_SOC_DAIFMT_CBS_CFS:
 95         case SND_SOC_DAIFMT_CBM_CFS:
 96         case SND_SOC_DAIFMT_CBS_CFM:
 97                 ret = -EINVAL;
 98                 break;
 99         default:
100                 dev_err(cpu_dai->dev, "%s: Unknown DAI master type\n",
101                         __func__);
102                 ret = -EINVAL;
103                 break;
104         }
105 
106         return ret;
107 }
108 
109 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
110                                 struct snd_pcm_hw_params *params,
111                                 struct snd_soc_dai *dai)
112 {
113         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
114         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
115         int ret = 0;
116 
117         bf5xx_i2s->tcr2 &= ~0x1f;
118         bf5xx_i2s->rcr2 &= ~0x1f;
119         switch (params_format(params)) {
120         case SNDRV_PCM_FORMAT_S8:
121                 bf5xx_i2s->tcr2 |= 7;
122                 bf5xx_i2s->rcr2 |= 7;
123                 sport_handle->wdsize = 1;
124                 break;
125         case SNDRV_PCM_FORMAT_S16_LE:
126                 bf5xx_i2s->tcr2 |= 15;
127                 bf5xx_i2s->rcr2 |= 15;
128                 sport_handle->wdsize = 2;
129                 break;
130         case SNDRV_PCM_FORMAT_S24_LE:
131                 bf5xx_i2s->tcr2 |= 23;
132                 bf5xx_i2s->rcr2 |= 23;
133                 sport_handle->wdsize = 3;
134                 break;
135         case SNDRV_PCM_FORMAT_S32_LE:
136                 bf5xx_i2s->tcr2 |= 31;
137                 bf5xx_i2s->rcr2 |= 31;
138                 sport_handle->wdsize = 4;
139                 break;
140         }
141 
142         if (!bf5xx_i2s->configured) {
143                 /*
144                  * TX and RX are not independent,they are enabled at the
145                  * same time, even if only one side is running. So, we
146                  * need to configure both of them at the time when the first
147                  * stream is opened.
148                  *
149                  * CPU DAI:slave mode.
150                  */
151                 bf5xx_i2s->configured = 1;
152                 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
153                                       bf5xx_i2s->rcr2, 0, 0);
154                 if (ret) {
155                         dev_err(dai->dev, "SPORT is busy!\n");
156                         return -EBUSY;
157                 }
158 
159                 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
160                                       bf5xx_i2s->tcr2, 0, 0);
161                 if (ret) {
162                         dev_err(dai->dev, "SPORT is busy!\n");
163                         return -EBUSY;
164                 }
165         }
166 
167         return 0;
168 }
169 
170 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
171                                struct snd_soc_dai *dai)
172 {
173         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
174         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
175 
176         dev_dbg(dai->dev, "%s enter\n", __func__);
177         /* No active stream, SPORT is allowed to be configured again. */
178         if (!dai->active)
179                 bf5xx_i2s->configured = 0;
180 }
181 
182 static int bf5xx_i2s_set_channel_map(struct snd_soc_dai *dai,
183                 unsigned int tx_num, unsigned int *tx_slot,
184                 unsigned int rx_num, unsigned int *rx_slot)
185 {
186         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
187         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
188         unsigned int tx_mapped = 0, rx_mapped = 0;
189         unsigned int slot;
190         int i;
191 
192         if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
193                         (rx_num > BFIN_TDM_DAI_MAX_SLOTS))
194                 return -EINVAL;
195 
196         for (i = 0; i < tx_num; i++) {
197                 slot = tx_slot[i];
198                 if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
199                                 (!(tx_mapped & (1 << slot)))) {
200                         bf5xx_i2s->tx_dma_data.map[i] = slot;
201                         tx_mapped |= 1 << slot;
202                 } else
203                         return -EINVAL;
204         }
205         for (i = 0; i < rx_num; i++) {
206                 slot = rx_slot[i];
207                 if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
208                                 (!(rx_mapped & (1 << slot)))) {
209                         bf5xx_i2s->rx_dma_data.map[i] = slot;
210                         rx_mapped |= 1 << slot;
211                 } else
212                         return -EINVAL;
213         }
214 
215         return 0;
216 }
217 
218 static int bf5xx_i2s_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
219         unsigned int rx_mask, int slots, int width)
220 {
221         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
222         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
223 
224         if (slots % 8 != 0 || slots > 8)
225                 return -EINVAL;
226 
227         if (width != 32)
228                 return -EINVAL;
229 
230         bf5xx_i2s->slots = slots;
231         bf5xx_i2s->tx_mask = tx_mask;
232         bf5xx_i2s->rx_mask = rx_mask;
233 
234         bf5xx_i2s->tx_dma_data.tdm_mode = slots != 0;
235         bf5xx_i2s->rx_dma_data.tdm_mode = slots != 0;
236 
237         return sport_set_multichannel(sport_handle, slots, tx_mask, rx_mask, 0);
238 }
239 
240 #ifdef CONFIG_PM
241 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
242 {
243         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
244 
245         dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
246 
247         if (dai->capture_active)
248                 sport_rx_stop(sport_handle);
249         if (dai->playback_active)
250                 sport_tx_stop(sport_handle);
251         return 0;
252 }
253 
254 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
255 {
256         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
257         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
258         int ret;
259 
260         dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
261 
262         ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
263                                       bf5xx_i2s->rcr2, 0, 0);
264         if (ret) {
265                 dev_err(dai->dev, "SPORT is busy!\n");
266                 return -EBUSY;
267         }
268 
269         ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
270                                       bf5xx_i2s->tcr2, 0, 0);
271         if (ret) {
272                 dev_err(dai->dev, "SPORT is busy!\n");
273                 return -EBUSY;
274         }
275 
276         return sport_set_multichannel(sport_handle, bf5xx_i2s->slots,
277                         bf5xx_i2s->tx_mask, bf5xx_i2s->rx_mask, 0);
278 }
279 
280 #else
281 #define bf5xx_i2s_suspend       NULL
282 #define bf5xx_i2s_resume        NULL
283 #endif
284 
285 static int bf5xx_i2s_dai_probe(struct snd_soc_dai *dai)
286 {
287         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
288         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
289         unsigned int i;
290 
291         for (i = 0; i < BFIN_TDM_DAI_MAX_SLOTS; i++) {
292                 bf5xx_i2s->tx_dma_data.map[i] = i;
293                 bf5xx_i2s->rx_dma_data.map[i] = i;
294         }
295 
296         dai->playback_dma_data = &bf5xx_i2s->tx_dma_data;
297         dai->capture_dma_data = &bf5xx_i2s->rx_dma_data;
298 
299         return 0;
300 }
301 
302 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
303                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
304                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
305                 SNDRV_PCM_RATE_96000)
306 
307 #define BF5XX_I2S_FORMATS \
308         (SNDRV_PCM_FMTBIT_S8 | \
309          SNDRV_PCM_FMTBIT_S16_LE | \
310          SNDRV_PCM_FMTBIT_S24_LE | \
311          SNDRV_PCM_FMTBIT_S32_LE)
312 
313 static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
314         .shutdown        = bf5xx_i2s_shutdown,
315         .hw_params       = bf5xx_i2s_hw_params,
316         .set_fmt         = bf5xx_i2s_set_dai_fmt,
317         .set_tdm_slot    = bf5xx_i2s_set_tdm_slot,
318         .set_channel_map = bf5xx_i2s_set_channel_map,
319 };
320 
321 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
322         .probe = bf5xx_i2s_dai_probe,
323         .suspend = bf5xx_i2s_suspend,
324         .resume = bf5xx_i2s_resume,
325         .playback = {
326                 .channels_min = 2,
327                 .channels_max = 8,
328                 .rates = BF5XX_I2S_RATES,
329                 .formats = BF5XX_I2S_FORMATS,},
330         .capture = {
331                 .channels_min = 2,
332                 .channels_max = 8,
333                 .rates = BF5XX_I2S_RATES,
334                 .formats = BF5XX_I2S_FORMATS,},
335         .ops = &bf5xx_i2s_dai_ops,
336 };
337 
338 static const struct snd_soc_component_driver bf5xx_i2s_component = {
339         .name           = "bf5xx-i2s",
340 };
341 
342 static int bf5xx_i2s_probe(struct platform_device *pdev)
343 {
344         struct sport_device *sport_handle;
345         int ret;
346 
347         /* configure SPORT for I2S */
348         sport_handle = sport_init(pdev, 4, 8 * sizeof(u32),
349                 sizeof(struct bf5xx_i2s_port));
350         if (!sport_handle)
351                 return -ENODEV;
352 
353         /* register with the ASoC layers */
354         ret = snd_soc_register_component(&pdev->dev, &bf5xx_i2s_component,
355                                          &bf5xx_i2s_dai, 1);
356         if (ret) {
357                 dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
358                 sport_done(sport_handle);
359                 return ret;
360         }
361 
362         return 0;
363 }
364 
365 static int bf5xx_i2s_remove(struct platform_device *pdev)
366 {
367         struct sport_device *sport_handle = platform_get_drvdata(pdev);
368 
369         dev_dbg(&pdev->dev, "%s enter\n", __func__);
370 
371         snd_soc_unregister_component(&pdev->dev);
372         sport_done(sport_handle);
373 
374         return 0;
375 }
376 
377 static struct platform_driver bfin_i2s_driver = {
378         .probe  = bf5xx_i2s_probe,
379         .remove = bf5xx_i2s_remove,
380         .driver = {
381                 .name = "bfin-i2s",
382                 .owner = THIS_MODULE,
383         },
384 };
385 
386 module_platform_driver(bfin_i2s_driver);
387 
388 /* Module information */
389 MODULE_AUTHOR("Cliff Cai");
390 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
391 MODULE_LICENSE("GPL");
392 
393 

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