1 /*
2 * omap-mcbsp.c -- OMAP ALSA SoC DAI driver using McBSP port
3 *
4 * Copyright (C) 2008 Nokia Corporation
5 *
6 * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
7 * Peter Ujfalusi <peter.ujfalusi@ti.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21 * 02110-1301 USA
22 *
23 */
24
25 #include <linux/init.h>
26 #include <linux/module.h>
27 #include <linux/device.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/of.h>
30 #include <linux/of_device.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/initval.h>
35 #include <sound/soc.h>
36 #include <sound/dmaengine_pcm.h>
37
38 #include <linux/platform_data/asoc-ti-mcbsp.h>
39 #include "mcbsp.h"
40 #include "omap-mcbsp.h"
41 #include "sdma-pcm.h"
42
43 #define OMAP_MCBSP_RATES (SNDRV_PCM_RATE_8000_96000)
44
45 #define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \
46 xhandler_get, xhandler_put) \
47 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
48 .info = omap_mcbsp_st_info_volsw, \
49 .get = xhandler_get, .put = xhandler_put, \
50 .private_value = (unsigned long) &(struct soc_mixer_control) \
51 {.min = xmin, .max = xmax} }
52
53 enum {
54 OMAP_MCBSP_WORD_8 = 0,
55 OMAP_MCBSP_WORD_12,
56 OMAP_MCBSP_WORD_16,
57 OMAP_MCBSP_WORD_20,
58 OMAP_MCBSP_WORD_24,
59 OMAP_MCBSP_WORD_32,
60 };
61
62 /*
63 * Stream DMA parameters. DMA request line and port address are set runtime
64 * since they are different between OMAP1 and later OMAPs
65 */
omap_mcbsp_set_threshold(struct snd_pcm_substream * substream,unsigned int packet_size)66 static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream,
67 unsigned int packet_size)
68 {
69 struct snd_soc_pcm_runtime *rtd = substream->private_data;
70 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
71 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
72 int words;
73
74 /*
75 * Configure McBSP threshold based on either:
76 * packet_size, when the sDMA is in packet mode, or based on the
77 * period size in THRESHOLD mode, otherwise use McBSP threshold = 1
78 * for mono streams.
79 */
80 if (packet_size)
81 words = packet_size;
82 else
83 words = 1;
84
85 /* Configure McBSP internal buffer usage */
86 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
87 omap_mcbsp_set_tx_threshold(mcbsp, words);
88 else
89 omap_mcbsp_set_rx_threshold(mcbsp, words);
90 }
91
omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)92 static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params,
93 struct snd_pcm_hw_rule *rule)
94 {
95 struct snd_interval *buffer_size = hw_param_interval(params,
96 SNDRV_PCM_HW_PARAM_BUFFER_SIZE);
97 struct snd_interval *channels = hw_param_interval(params,
98 SNDRV_PCM_HW_PARAM_CHANNELS);
99 struct omap_mcbsp *mcbsp = rule->private;
100 struct snd_interval frames;
101 int size;
102
103 snd_interval_any(&frames);
104 size = mcbsp->pdata->buffer_size;
105
106 frames.min = size / channels->min;
107 frames.integer = 1;
108 return snd_interval_refine(buffer_size, &frames);
109 }
110
omap_mcbsp_dai_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)111 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
112 struct snd_soc_dai *cpu_dai)
113 {
114 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
115 int err = 0;
116
117 if (!cpu_dai->active)
118 err = omap_mcbsp_request(mcbsp);
119
120 /*
121 * OMAP3 McBSP FIFO is word structured.
122 * McBSP2 has 1024 + 256 = 1280 word long buffer,
123 * McBSP1,3,4,5 has 128 word long buffer
124 * This means that the size of the FIFO depends on the sample format.
125 * For example on McBSP3:
126 * 16bit samples: size is 128 * 2 = 256 bytes
127 * 32bit samples: size is 128 * 4 = 512 bytes
128 * It is simpler to place constraint for buffer and period based on
129 * channels.
130 * McBSP3 as example again (16 or 32 bit samples):
131 * 1 channel (mono): size is 128 frames (128 words)
132 * 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
133 * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
134 */
135 if (mcbsp->pdata->buffer_size) {
136 /*
137 * Rule for the buffer size. We should not allow
138 * smaller buffer than the FIFO size to avoid underruns.
139 * This applies only for the playback stream.
140 */
141 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
142 snd_pcm_hw_rule_add(substream->runtime, 0,
143 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
144 omap_mcbsp_hwrule_min_buffersize,
145 mcbsp,
146 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
147
148 /* Make sure, that the period size is always even */
149 snd_pcm_hw_constraint_step(substream->runtime, 0,
150 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
151 }
152
153 return err;
154 }
155
omap_mcbsp_dai_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)156 static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
157 struct snd_soc_dai *cpu_dai)
158 {
159 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
160 int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
161 int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
162 int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
163
164 if (mcbsp->latency[stream2])
165 pm_qos_update_request(&mcbsp->pm_qos_req,
166 mcbsp->latency[stream2]);
167 else if (mcbsp->latency[stream1])
168 pm_qos_remove_request(&mcbsp->pm_qos_req);
169
170 mcbsp->latency[stream1] = 0;
171
172 if (!cpu_dai->active) {
173 omap_mcbsp_free(mcbsp);
174 mcbsp->configured = 0;
175 }
176 }
177
omap_mcbsp_dai_prepare(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)178 static int omap_mcbsp_dai_prepare(struct snd_pcm_substream *substream,
179 struct snd_soc_dai *cpu_dai)
180 {
181 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
182 struct pm_qos_request *pm_qos_req = &mcbsp->pm_qos_req;
183 int tx = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
184 int stream1 = tx ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
185 int stream2 = tx ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
186 int latency = mcbsp->latency[stream2];
187
188 /* Prevent omap hardware from hitting off between FIFO fills */
189 if (!latency || mcbsp->latency[stream1] < latency)
190 latency = mcbsp->latency[stream1];
191
192 if (pm_qos_request_active(pm_qos_req))
193 pm_qos_update_request(pm_qos_req, latency);
194 else if (latency)
195 pm_qos_add_request(pm_qos_req, PM_QOS_CPU_DMA_LATENCY, latency);
196
197 return 0;
198 }
199
omap_mcbsp_dai_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * cpu_dai)200 static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
201 struct snd_soc_dai *cpu_dai)
202 {
203 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
204 int err = 0, play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
205
206 switch (cmd) {
207 case SNDRV_PCM_TRIGGER_START:
208 case SNDRV_PCM_TRIGGER_RESUME:
209 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
210 mcbsp->active++;
211 omap_mcbsp_start(mcbsp, play, !play);
212 break;
213
214 case SNDRV_PCM_TRIGGER_STOP:
215 case SNDRV_PCM_TRIGGER_SUSPEND:
216 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
217 omap_mcbsp_stop(mcbsp, play, !play);
218 mcbsp->active--;
219 break;
220 default:
221 err = -EINVAL;
222 }
223
224 return err;
225 }
226
omap_mcbsp_dai_delay(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)227 static snd_pcm_sframes_t omap_mcbsp_dai_delay(
228 struct snd_pcm_substream *substream,
229 struct snd_soc_dai *dai)
230 {
231 struct snd_soc_pcm_runtime *rtd = substream->private_data;
232 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
233 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
234 u16 fifo_use;
235 snd_pcm_sframes_t delay;
236
237 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
238 fifo_use = omap_mcbsp_get_tx_delay(mcbsp);
239 else
240 fifo_use = omap_mcbsp_get_rx_delay(mcbsp);
241
242 /*
243 * Divide the used locations with the channel count to get the
244 * FIFO usage in samples (don't care about partial samples in the
245 * buffer).
246 */
247 delay = fifo_use / substream->runtime->channels;
248
249 return delay;
250 }
251
omap_mcbsp_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * cpu_dai)252 static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
253 struct snd_pcm_hw_params *params,
254 struct snd_soc_dai *cpu_dai)
255 {
256 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
257 struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
258 struct snd_dmaengine_dai_dma_data *dma_data;
259 int wlen, channels, wpf;
260 int pkt_size = 0;
261 unsigned int format, div, framesize, master;
262 unsigned int buffer_size = mcbsp->pdata->buffer_size;
263
264 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
265 channels = params_channels(params);
266
267 switch (params_format(params)) {
268 case SNDRV_PCM_FORMAT_S16_LE:
269 wlen = 16;
270 break;
271 case SNDRV_PCM_FORMAT_S32_LE:
272 wlen = 32;
273 break;
274 default:
275 return -EINVAL;
276 }
277 if (buffer_size) {
278 int latency;
279
280 if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {
281 int period_words, max_thrsh;
282 int divider = 0;
283
284 period_words = params_period_bytes(params) / (wlen / 8);
285 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
286 max_thrsh = mcbsp->max_tx_thres;
287 else
288 max_thrsh = mcbsp->max_rx_thres;
289 /*
290 * Use sDMA packet mode if McBSP is in threshold mode:
291 * If period words less than the FIFO size the packet
292 * size is set to the number of period words, otherwise
293 * Look for the biggest threshold value which divides
294 * the period size evenly.
295 */
296 divider = period_words / max_thrsh;
297 if (period_words % max_thrsh)
298 divider++;
299 while (period_words % divider &&
300 divider < period_words)
301 divider++;
302 if (divider == period_words)
303 return -EINVAL;
304
305 pkt_size = period_words / divider;
306 } else if (channels > 1) {
307 /* Use packet mode for non mono streams */
308 pkt_size = channels;
309 }
310
311 latency = ((((buffer_size - pkt_size) / channels) * 1000)
312 / (params->rate_num / params->rate_den));
313
314 mcbsp->latency[substream->stream] = latency;
315
316 omap_mcbsp_set_threshold(substream, pkt_size);
317 }
318
319 dma_data->maxburst = pkt_size;
320
321 if (mcbsp->configured) {
322 /* McBSP already configured by another stream */
323 return 0;
324 }
325
326 regs->rcr2 &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7));
327 regs->xcr2 &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7));
328 regs->rcr1 &= ~(RFRLEN1(0x7f) | RWDLEN1(7));
329 regs->xcr1 &= ~(XFRLEN1(0x7f) | XWDLEN1(7));
330 format = mcbsp->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
331 wpf = channels;
332 if (channels == 2 && (format == SND_SOC_DAIFMT_I2S ||
333 format == SND_SOC_DAIFMT_LEFT_J)) {
334 /* Use dual-phase frames */
335 regs->rcr2 |= RPHASE;
336 regs->xcr2 |= XPHASE;
337 /* Set 1 word per (McBSP) frame for phase1 and phase2 */
338 wpf--;
339 regs->rcr2 |= RFRLEN2(wpf - 1);
340 regs->xcr2 |= XFRLEN2(wpf - 1);
341 }
342
343 regs->rcr1 |= RFRLEN1(wpf - 1);
344 regs->xcr1 |= XFRLEN1(wpf - 1);
345
346 switch (params_format(params)) {
347 case SNDRV_PCM_FORMAT_S16_LE:
348 /* Set word lengths */
349 regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_16);
350 regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_16);
351 regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_16);
352 regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_16);
353 break;
354 case SNDRV_PCM_FORMAT_S32_LE:
355 /* Set word lengths */
356 regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_32);
357 regs->rcr1 |= RWDLEN1(OMAP_MCBSP_WORD_32);
358 regs->xcr2 |= XWDLEN2(OMAP_MCBSP_WORD_32);
359 regs->xcr1 |= XWDLEN1(OMAP_MCBSP_WORD_32);
360 break;
361 default:
362 /* Unsupported PCM format */
363 return -EINVAL;
364 }
365
366 /* In McBSP master modes, FRAME (i.e. sample rate) is generated
367 * by _counting_ BCLKs. Calculate frame size in BCLKs */
368 master = mcbsp->fmt & SND_SOC_DAIFMT_MASTER_MASK;
369 if (master == SND_SOC_DAIFMT_CBS_CFS) {
370 div = mcbsp->clk_div ? mcbsp->clk_div : 1;
371 framesize = (mcbsp->in_freq / div) / params_rate(params);
372
373 if (framesize < wlen * channels) {
374 printk(KERN_ERR "%s: not enough bandwidth for desired rate and "
375 "channels\n", __func__);
376 return -EINVAL;
377 }
378 } else
379 framesize = wlen * channels;
380
381 /* Set FS period and length in terms of bit clock periods */
382 regs->srgr2 &= ~FPER(0xfff);
383 regs->srgr1 &= ~FWID(0xff);
384 switch (format) {
385 case SND_SOC_DAIFMT_I2S:
386 case SND_SOC_DAIFMT_LEFT_J:
387 regs->srgr2 |= FPER(framesize - 1);
388 regs->srgr1 |= FWID((framesize >> 1) - 1);
389 break;
390 case SND_SOC_DAIFMT_DSP_A:
391 case SND_SOC_DAIFMT_DSP_B:
392 regs->srgr2 |= FPER(framesize - 1);
393 regs->srgr1 |= FWID(0);
394 break;
395 }
396
397 omap_mcbsp_config(mcbsp, &mcbsp->cfg_regs);
398 mcbsp->wlen = wlen;
399 mcbsp->configured = 1;
400
401 return 0;
402 }
403
404 /*
405 * This must be called before _set_clkdiv and _set_sysclk since McBSP register
406 * cache is initialized here
407 */
omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)408 static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
409 unsigned int fmt)
410 {
411 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
412 struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
413 bool inv_fs = false;
414
415 if (mcbsp->configured)
416 return 0;
417
418 mcbsp->fmt = fmt;
419 memset(regs, 0, sizeof(*regs));
420 /* Generic McBSP register settings */
421 regs->spcr2 |= XINTM(3) | FREE;
422 regs->spcr1 |= RINTM(3);
423 /* RFIG and XFIG are not defined in 2430 and on OMAP3+ */
424 if (!mcbsp->pdata->has_ccr) {
425 regs->rcr2 |= RFIG;
426 regs->xcr2 |= XFIG;
427 }
428
429 /* Configure XCCR/RCCR only for revisions which have ccr registers */
430 if (mcbsp->pdata->has_ccr) {
431 regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE;
432 regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE;
433 }
434
435 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
436 case SND_SOC_DAIFMT_I2S:
437 /* 1-bit data delay */
438 regs->rcr2 |= RDATDLY(1);
439 regs->xcr2 |= XDATDLY(1);
440 break;
441 case SND_SOC_DAIFMT_LEFT_J:
442 /* 0-bit data delay */
443 regs->rcr2 |= RDATDLY(0);
444 regs->xcr2 |= XDATDLY(0);
445 regs->spcr1 |= RJUST(2);
446 /* Invert FS polarity configuration */
447 inv_fs = true;
448 break;
449 case SND_SOC_DAIFMT_DSP_A:
450 /* 1-bit data delay */
451 regs->rcr2 |= RDATDLY(1);
452 regs->xcr2 |= XDATDLY(1);
453 /* Invert FS polarity configuration */
454 inv_fs = true;
455 break;
456 case SND_SOC_DAIFMT_DSP_B:
457 /* 0-bit data delay */
458 regs->rcr2 |= RDATDLY(0);
459 regs->xcr2 |= XDATDLY(0);
460 /* Invert FS polarity configuration */
461 inv_fs = true;
462 break;
463 default:
464 /* Unsupported data format */
465 return -EINVAL;
466 }
467
468 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
469 case SND_SOC_DAIFMT_CBS_CFS:
470 /* McBSP master. Set FS and bit clocks as outputs */
471 regs->pcr0 |= FSXM | FSRM |
472 CLKXM | CLKRM;
473 /* Sample rate generator drives the FS */
474 regs->srgr2 |= FSGM;
475 break;
476 case SND_SOC_DAIFMT_CBM_CFS:
477 /* McBSP slave. FS clock as output */
478 regs->srgr2 |= FSGM;
479 regs->pcr0 |= FSXM | FSRM;
480 break;
481 case SND_SOC_DAIFMT_CBM_CFM:
482 /* McBSP slave */
483 break;
484 default:
485 /* Unsupported master/slave configuration */
486 return -EINVAL;
487 }
488
489 /* Set bit clock (CLKX/CLKR) and FS polarities */
490 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
491 case SND_SOC_DAIFMT_NB_NF:
492 /*
493 * Normal BCLK + FS.
494 * FS active low. TX data driven on falling edge of bit clock
495 * and RX data sampled on rising edge of bit clock.
496 */
497 regs->pcr0 |= FSXP | FSRP |
498 CLKXP | CLKRP;
499 break;
500 case SND_SOC_DAIFMT_NB_IF:
501 regs->pcr0 |= CLKXP | CLKRP;
502 break;
503 case SND_SOC_DAIFMT_IB_NF:
504 regs->pcr0 |= FSXP | FSRP;
505 break;
506 case SND_SOC_DAIFMT_IB_IF:
507 break;
508 default:
509 return -EINVAL;
510 }
511 if (inv_fs == true)
512 regs->pcr0 ^= FSXP | FSRP;
513
514 return 0;
515 }
516
omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai * cpu_dai,int div_id,int div)517 static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
518 int div_id, int div)
519 {
520 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
521 struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
522
523 if (div_id != OMAP_MCBSP_CLKGDV)
524 return -ENODEV;
525
526 mcbsp->clk_div = div;
527 regs->srgr1 &= ~CLKGDV(0xff);
528 regs->srgr1 |= CLKGDV(div - 1);
529
530 return 0;
531 }
532
omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai * cpu_dai,int clk_id,unsigned int freq,int dir)533 static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
534 int clk_id, unsigned int freq,
535 int dir)
536 {
537 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
538 struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
539 int err = 0;
540
541 if (mcbsp->active) {
542 if (freq == mcbsp->in_freq)
543 return 0;
544 else
545 return -EBUSY;
546 }
547
548 mcbsp->in_freq = freq;
549 regs->srgr2 &= ~CLKSM;
550 regs->pcr0 &= ~SCLKME;
551
552 switch (clk_id) {
553 case OMAP_MCBSP_SYSCLK_CLK:
554 regs->srgr2 |= CLKSM;
555 break;
556 case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
557 if (mcbsp_omap1()) {
558 err = -EINVAL;
559 break;
560 }
561 err = omap2_mcbsp_set_clks_src(mcbsp,
562 MCBSP_CLKS_PRCM_SRC);
563 break;
564 case OMAP_MCBSP_SYSCLK_CLKS_EXT:
565 if (mcbsp_omap1()) {
566 err = 0;
567 break;
568 }
569 err = omap2_mcbsp_set_clks_src(mcbsp,
570 MCBSP_CLKS_PAD_SRC);
571 break;
572
573 case OMAP_MCBSP_SYSCLK_CLKX_EXT:
574 regs->srgr2 |= CLKSM;
575 regs->pcr0 |= SCLKME;
576 /*
577 * If McBSP is master but yet the CLKX/CLKR pin drives the SRG,
578 * disable output on those pins. This enables to inject the
579 * reference clock through CLKX/CLKR. For this to work
580 * set_dai_sysclk() _needs_ to be called after set_dai_fmt().
581 */
582 regs->pcr0 &= ~CLKXM;
583 break;
584 case OMAP_MCBSP_SYSCLK_CLKR_EXT:
585 regs->pcr0 |= SCLKME;
586 /* Disable ouput on CLKR pin in master mode */
587 regs->pcr0 &= ~CLKRM;
588 break;
589 default:
590 err = -ENODEV;
591 }
592
593 return err;
594 }
595
596 static const struct snd_soc_dai_ops mcbsp_dai_ops = {
597 .startup = omap_mcbsp_dai_startup,
598 .shutdown = omap_mcbsp_dai_shutdown,
599 .prepare = omap_mcbsp_dai_prepare,
600 .trigger = omap_mcbsp_dai_trigger,
601 .delay = omap_mcbsp_dai_delay,
602 .hw_params = omap_mcbsp_dai_hw_params,
603 .set_fmt = omap_mcbsp_dai_set_dai_fmt,
604 .set_clkdiv = omap_mcbsp_dai_set_clkdiv,
605 .set_sysclk = omap_mcbsp_dai_set_dai_sysclk,
606 };
607
omap_mcbsp_probe(struct snd_soc_dai * dai)608 static int omap_mcbsp_probe(struct snd_soc_dai *dai)
609 {
610 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(dai);
611
612 pm_runtime_enable(mcbsp->dev);
613
614 snd_soc_dai_init_dma_data(dai,
615 &mcbsp->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
616 &mcbsp->dma_data[SNDRV_PCM_STREAM_CAPTURE]);
617
618 return 0;
619 }
620
omap_mcbsp_remove(struct snd_soc_dai * dai)621 static int omap_mcbsp_remove(struct snd_soc_dai *dai)
622 {
623 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(dai);
624
625 pm_runtime_disable(mcbsp->dev);
626
627 return 0;
628 }
629
630 static struct snd_soc_dai_driver omap_mcbsp_dai = {
631 .probe = omap_mcbsp_probe,
632 .remove = omap_mcbsp_remove,
633 .playback = {
634 .channels_min = 1,
635 .channels_max = 16,
636 .rates = OMAP_MCBSP_RATES,
637 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
638 },
639 .capture = {
640 .channels_min = 1,
641 .channels_max = 16,
642 .rates = OMAP_MCBSP_RATES,
643 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
644 },
645 .ops = &mcbsp_dai_ops,
646 };
647
648 static const struct snd_soc_component_driver omap_mcbsp_component = {
649 .name = "omap-mcbsp",
650 };
651
omap_mcbsp_st_info_volsw(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)652 static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
653 struct snd_ctl_elem_info *uinfo)
654 {
655 struct soc_mixer_control *mc =
656 (struct soc_mixer_control *)kcontrol->private_value;
657 int max = mc->max;
658 int min = mc->min;
659
660 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
661 uinfo->count = 1;
662 uinfo->value.integer.min = min;
663 uinfo->value.integer.max = max;
664 return 0;
665 }
666
667 #define OMAP_MCBSP_ST_CHANNEL_VOLUME(channel) \
668 static int \
669 omap_mcbsp_set_st_ch##channel##_volume(struct snd_kcontrol *kc, \
670 struct snd_ctl_elem_value *uc) \
671 { \
672 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc); \
673 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai); \
674 struct soc_mixer_control *mc = \
675 (struct soc_mixer_control *)kc->private_value; \
676 int max = mc->max; \
677 int min = mc->min; \
678 int val = uc->value.integer.value[0]; \
679 \
680 if (val < min || val > max) \
681 return -EINVAL; \
682 \
683 /* OMAP McBSP implementation uses index values 0..4 */ \
684 return omap_st_set_chgain(mcbsp, channel, val); \
685 } \
686 \
687 static int \
688 omap_mcbsp_get_st_ch##channel##_volume(struct snd_kcontrol *kc, \
689 struct snd_ctl_elem_value *uc) \
690 { \
691 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc); \
692 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai); \
693 s16 chgain; \
694 \
695 if (omap_st_get_chgain(mcbsp, channel, &chgain)) \
696 return -EAGAIN; \
697 \
698 uc->value.integer.value[0] = chgain; \
699 return 0; \
700 }
701
702 OMAP_MCBSP_ST_CHANNEL_VOLUME(0)
703 OMAP_MCBSP_ST_CHANNEL_VOLUME(1)
704
omap_mcbsp_st_put_mode(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)705 static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
706 struct snd_ctl_elem_value *ucontrol)
707 {
708 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
709 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
710 u8 value = ucontrol->value.integer.value[0];
711
712 if (value == omap_st_is_enabled(mcbsp))
713 return 0;
714
715 if (value)
716 omap_st_enable(mcbsp);
717 else
718 omap_st_disable(mcbsp);
719
720 return 1;
721 }
722
omap_mcbsp_st_get_mode(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)723 static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
724 struct snd_ctl_elem_value *ucontrol)
725 {
726 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
727 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
728
729 ucontrol->value.integer.value[0] = omap_st_is_enabled(mcbsp);
730 return 0;
731 }
732
733 #define OMAP_MCBSP_ST_CONTROLS(port) \
734 static const struct snd_kcontrol_new omap_mcbsp##port##_st_controls[] = { \
735 SOC_SINGLE_EXT("McBSP" #port " Sidetone Switch", 1, 0, 1, 0, \
736 omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode), \
737 OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 0 Volume", \
738 -32768, 32767, \
739 omap_mcbsp_get_st_ch0_volume, \
740 omap_mcbsp_set_st_ch0_volume), \
741 OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 1 Volume", \
742 -32768, 32767, \
743 omap_mcbsp_get_st_ch1_volume, \
744 omap_mcbsp_set_st_ch1_volume), \
745 }
746
747 OMAP_MCBSP_ST_CONTROLS(2);
748 OMAP_MCBSP_ST_CONTROLS(3);
749
omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime * rtd,int port_id)750 int omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime *rtd, int port_id)
751 {
752 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
753 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
754
755 if (!mcbsp->st_data) {
756 dev_warn(mcbsp->dev, "No sidetone data for port\n");
757 return 0;
758 }
759
760 switch (port_id) {
761 case 2: /* McBSP 2 */
762 return snd_soc_add_dai_controls(cpu_dai,
763 omap_mcbsp2_st_controls,
764 ARRAY_SIZE(omap_mcbsp2_st_controls));
765 case 3: /* McBSP 3 */
766 return snd_soc_add_dai_controls(cpu_dai,
767 omap_mcbsp3_st_controls,
768 ARRAY_SIZE(omap_mcbsp3_st_controls));
769 default:
770 dev_err(mcbsp->dev, "Port %d not supported\n", port_id);
771 break;
772 }
773
774 return -EINVAL;
775 }
776 EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
777
778 static struct omap_mcbsp_platform_data omap2420_pdata = {
779 .reg_step = 4,
780 .reg_size = 2,
781 };
782
783 static struct omap_mcbsp_platform_data omap2430_pdata = {
784 .reg_step = 4,
785 .reg_size = 4,
786 .has_ccr = true,
787 };
788
789 static struct omap_mcbsp_platform_data omap3_pdata = {
790 .reg_step = 4,
791 .reg_size = 4,
792 .has_ccr = true,
793 .has_wakeup = true,
794 };
795
796 static struct omap_mcbsp_platform_data omap4_pdata = {
797 .reg_step = 4,
798 .reg_size = 4,
799 .has_ccr = true,
800 .has_wakeup = true,
801 };
802
803 static const struct of_device_id omap_mcbsp_of_match[] = {
804 {
805 .compatible = "ti,omap2420-mcbsp",
806 .data = &omap2420_pdata,
807 },
808 {
809 .compatible = "ti,omap2430-mcbsp",
810 .data = &omap2430_pdata,
811 },
812 {
813 .compatible = "ti,omap3-mcbsp",
814 .data = &omap3_pdata,
815 },
816 {
817 .compatible = "ti,omap4-mcbsp",
818 .data = &omap4_pdata,
819 },
820 { },
821 };
822 MODULE_DEVICE_TABLE(of, omap_mcbsp_of_match);
823
asoc_mcbsp_probe(struct platform_device * pdev)824 static int asoc_mcbsp_probe(struct platform_device *pdev)
825 {
826 struct omap_mcbsp_platform_data *pdata = dev_get_platdata(&pdev->dev);
827 struct omap_mcbsp *mcbsp;
828 const struct of_device_id *match;
829 int ret;
830
831 match = of_match_device(omap_mcbsp_of_match, &pdev->dev);
832 if (match) {
833 struct device_node *node = pdev->dev.of_node;
834 struct omap_mcbsp_platform_data *pdata_quirk = pdata;
835 int buffer_size;
836
837 pdata = devm_kzalloc(&pdev->dev,
838 sizeof(struct omap_mcbsp_platform_data),
839 GFP_KERNEL);
840 if (!pdata)
841 return -ENOMEM;
842
843 memcpy(pdata, match->data, sizeof(*pdata));
844 if (!of_property_read_u32(node, "ti,buffer-size", &buffer_size))
845 pdata->buffer_size = buffer_size;
846 if (pdata_quirk)
847 pdata->force_ick_on = pdata_quirk->force_ick_on;
848 } else if (!pdata) {
849 dev_err(&pdev->dev, "missing platform data.\n");
850 return -EINVAL;
851 }
852 mcbsp = devm_kzalloc(&pdev->dev, sizeof(struct omap_mcbsp), GFP_KERNEL);
853 if (!mcbsp)
854 return -ENOMEM;
855
856 mcbsp->id = pdev->id;
857 mcbsp->pdata = pdata;
858 mcbsp->dev = &pdev->dev;
859 platform_set_drvdata(pdev, mcbsp);
860
861 ret = omap_mcbsp_init(pdev);
862 if (ret)
863 return ret;
864
865 ret = devm_snd_soc_register_component(&pdev->dev,
866 &omap_mcbsp_component,
867 &omap_mcbsp_dai, 1);
868 if (ret)
869 return ret;
870
871 return sdma_pcm_platform_register(&pdev->dev, NULL, NULL);
872 }
873
asoc_mcbsp_remove(struct platform_device * pdev)874 static int asoc_mcbsp_remove(struct platform_device *pdev)
875 {
876 struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
877
878 if (mcbsp->pdata->ops && mcbsp->pdata->ops->free)
879 mcbsp->pdata->ops->free(mcbsp->id);
880
881 if (pm_qos_request_active(&mcbsp->pm_qos_req))
882 pm_qos_remove_request(&mcbsp->pm_qos_req);
883
884 omap_mcbsp_cleanup(mcbsp);
885
886 clk_put(mcbsp->fclk);
887
888 return 0;
889 }
890
891 static struct platform_driver asoc_mcbsp_driver = {
892 .driver = {
893 .name = "omap-mcbsp",
894 .of_match_table = omap_mcbsp_of_match,
895 },
896
897 .probe = asoc_mcbsp_probe,
898 .remove = asoc_mcbsp_remove,
899 };
900
901 module_platform_driver(asoc_mcbsp_driver);
902
903 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
904 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
905 MODULE_LICENSE("GPL");
906 MODULE_ALIAS("platform:omap-mcbsp");
907
