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
bf5xx_i2s_set_dai_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)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
bf5xx_i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)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
bf5xx_i2s_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)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
bf5xx_i2s_set_channel_map(struct snd_soc_dai * dai,unsigned int tx_num,unsigned int * tx_slot,unsigned int rx_num,unsigned int * rx_slot)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
bf5xx_i2s_set_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int width)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
bf5xx_i2s_suspend(struct snd_soc_dai * dai)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
bf5xx_i2s_resume(struct snd_soc_dai * dai)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
bf5xx_i2s_dai_probe(struct snd_soc_dai * dai)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
bf5xx_i2s_probe(struct platform_device * pdev)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
bf5xx_i2s_remove(struct platform_device * pdev)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