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First Support on Ginger and OMAP TI
[linux-ginger.git] / sound / soc / pxa / pxa-ssp.c
blobd11a6d7e384abdfeab68eb47120a251f8734fe47
1 /*
2 * pxa-ssp.c -- ALSA Soc Audio Layer
3 *
4 * Copyright 2005,2008 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood
6 * Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * TODO:
14 * o Test network mode for > 16bit sample size
15 */
16
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21 #include <linux/io.h>
22
23 #include <asm/irq.h>
24
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/initval.h>
28 #include <sound/pcm_params.h>
29 #include <sound/soc.h>
30 #include <sound/pxa2xx-lib.h>
31
32 #include <mach/hardware.h>
33 #include <mach/dma.h>
34 #include <mach/regs-ssp.h>
35 #include <mach/audio.h>
36 #include <mach/ssp.h>
37
38 #include "pxa2xx-pcm.h"
39 #include "pxa-ssp.h"
40
41 /*
42 * SSP audio private data
43 */
44 struct ssp_priv {
45 struct ssp_dev dev;
46 unsigned int sysclk;
47 int dai_fmt;
48 #ifdef CONFIG_PM
49 struct ssp_state state;
50 #endif
51 };
52
53 static void dump_registers(struct ssp_device *ssp)
54 {
55 dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
56 ssp_read_reg(ssp, SSCR0), ssp_read_reg(ssp, SSCR1),
57 ssp_read_reg(ssp, SSTO));
58
59 dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
60 ssp_read_reg(ssp, SSPSP), ssp_read_reg(ssp, SSSR),
61 ssp_read_reg(ssp, SSACD));
62 }
63
64 struct pxa2xx_pcm_dma_data {
65 struct pxa2xx_pcm_dma_params params;
66 char name[20];
67 };
68
69 static struct pxa2xx_pcm_dma_params *
70 ssp_get_dma_params(struct ssp_device *ssp, int width4, int out)
71 {
72 struct pxa2xx_pcm_dma_data *dma;
73
74 dma = kzalloc(sizeof(struct pxa2xx_pcm_dma_data), GFP_KERNEL);
75 if (dma == NULL)
76 return NULL;
77
78 snprintf(dma->name, 20, "SSP%d PCM %s %s", ssp->port_id,
79 width4 ? "32-bit" : "16-bit", out ? "out" : "in");
80
81 dma->params.name = dma->name;
82 dma->params.drcmr = &DRCMR(out ? ssp->drcmr_tx : ssp->drcmr_rx);
83 dma->params.dcmd = (out ? (DCMD_INCSRCADDR | DCMD_FLOWTRG) :
84 (DCMD_INCTRGADDR | DCMD_FLOWSRC)) |
85 (width4 ? DCMD_WIDTH4 : DCMD_WIDTH2) | DCMD_BURST16;
86 dma->params.dev_addr = ssp->phys_base + SSDR;
87
88 return &dma->params;
89 }
90
91 static int pxa_ssp_startup(struct snd_pcm_substream *substream,
92 struct snd_soc_dai *dai)
93 {
94 struct snd_soc_pcm_runtime *rtd = substream->private_data;
95 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
96 struct ssp_priv *priv = cpu_dai->private_data;
97 int ret = 0;
98
99 if (!cpu_dai->active) {
100 priv->dev.port = cpu_dai->id + 1;
101 priv->dev.irq = NO_IRQ;
102 clk_enable(priv->dev.ssp->clk);
103 ssp_disable(&priv->dev);
104 }
105
106 if (cpu_dai->dma_data) {
107 kfree(cpu_dai->dma_data);
108 cpu_dai->dma_data = NULL;
109 }
110 return ret;
111 }
112
113 static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
114 struct snd_soc_dai *dai)
115 {
116 struct snd_soc_pcm_runtime *rtd = substream->private_data;
117 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
118 struct ssp_priv *priv = cpu_dai->private_data;
119
120 if (!cpu_dai->active) {
121 ssp_disable(&priv->dev);
122 clk_disable(priv->dev.ssp->clk);
123 }
124
125 if (cpu_dai->dma_data) {
126 kfree(cpu_dai->dma_data);
127 cpu_dai->dma_data = NULL;
128 }
129 }
130
131 #ifdef CONFIG_PM
132
133 static int pxa_ssp_suspend(struct snd_soc_dai *cpu_dai)
134 {
135 struct ssp_priv *priv = cpu_dai->private_data;
136
137 if (!cpu_dai->active)
138 return 0;
139
140 ssp_save_state(&priv->dev, &priv->state);
141 clk_disable(priv->dev.ssp->clk);
142 return 0;
143 }
144
145 static int pxa_ssp_resume(struct snd_soc_dai *cpu_dai)
146 {
147 struct ssp_priv *priv = cpu_dai->private_data;
148
149 if (!cpu_dai->active)
150 return 0;
151
152 clk_enable(priv->dev.ssp->clk);
153 ssp_restore_state(&priv->dev, &priv->state);
154 ssp_enable(&priv->dev);
155
156 return 0;
157 }
158
159 #else
160 #define pxa_ssp_suspend NULL
161 #define pxa_ssp_resume NULL
162 #endif
163
164 /**
165 * ssp_set_clkdiv - set SSP clock divider
166 * @div: serial clock rate divider
167 */
168 static void ssp_set_scr(struct ssp_device *ssp, u32 div)
169 {
170 u32 sscr0 = ssp_read_reg(ssp, SSCR0);
171
172 if (cpu_is_pxa25x() && ssp->type == PXA25x_SSP) {
173 sscr0 &= ~0x0000ff00;
174 sscr0 |= ((div - 2)/2) << 8; /* 2..512 */
175 } else {
176 sscr0 &= ~0x000fff00;
177 sscr0 |= (div - 1) << 8; /* 1..4096 */
178 }
179 ssp_write_reg(ssp, SSCR0, sscr0);
180 }
181
182 /**
183 * ssp_get_clkdiv - get SSP clock divider
184 */
185 static u32 ssp_get_scr(struct ssp_device *ssp)
186 {
187 u32 sscr0 = ssp_read_reg(ssp, SSCR0);
188 u32 div;
189
190 if (cpu_is_pxa25x() && ssp->type == PXA25x_SSP)
191 div = ((sscr0 >> 8) & 0xff) * 2 + 2;
192 else
193 div = ((sscr0 >> 8) & 0xfff) + 1;
194 return div;
195 }
196
197 /*
198 * Set the SSP ports SYSCLK.
199 */
200 static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
201 int clk_id, unsigned int freq, int dir)
202 {
203 struct ssp_priv *priv = cpu_dai->private_data;
204 struct ssp_device *ssp = priv->dev.ssp;
205 int val;
206
207 u32 sscr0 = ssp_read_reg(ssp, SSCR0) &
208 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
209
210 dev_dbg(&ssp->pdev->dev,
211 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %u\n",
212 cpu_dai->id, clk_id, freq);
213
214 switch (clk_id) {
215 case PXA_SSP_CLK_NET_PLL:
216 sscr0 |= SSCR0_MOD;
217 break;
218 case PXA_SSP_CLK_PLL:
219 /* Internal PLL is fixed */
220 if (cpu_is_pxa25x())
221 priv->sysclk = 1843200;
222 else
223 priv->sysclk = 13000000;
224 break;
225 case PXA_SSP_CLK_EXT:
226 priv->sysclk = freq;
227 sscr0 |= SSCR0_ECS;
228 break;
229 case PXA_SSP_CLK_NET:
230 priv->sysclk = freq;
231 sscr0 |= SSCR0_NCS | SSCR0_MOD;
232 break;
233 case PXA_SSP_CLK_AUDIO:
234 priv->sysclk = 0;
235 ssp_set_scr(ssp, 1);
236 sscr0 |= SSCR0_ACS;
237 break;
238 default:
239 return -ENODEV;
240 }
241
242 /* The SSP clock must be disabled when changing SSP clock mode
243 * on PXA2xx. On PXA3xx it must be enabled when doing so. */
244 if (!cpu_is_pxa3xx())
245 clk_disable(priv->dev.ssp->clk);
246 val = ssp_read_reg(ssp, SSCR0) | sscr0;
247 ssp_write_reg(ssp, SSCR0, val);
248 if (!cpu_is_pxa3xx())
249 clk_enable(priv->dev.ssp->clk);
250
251 return 0;
252 }
253
254 /*
255 * Set the SSP clock dividers.
256 */
257 static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
258 int div_id, int div)
259 {
260 struct ssp_priv *priv = cpu_dai->private_data;
261 struct ssp_device *ssp = priv->dev.ssp;
262 int val;
263
264 switch (div_id) {
265 case PXA_SSP_AUDIO_DIV_ACDS:
266 val = (ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
267 ssp_write_reg(ssp, SSACD, val);
268 break;
269 case PXA_SSP_AUDIO_DIV_SCDB:
270 val = ssp_read_reg(ssp, SSACD);
271 val &= ~SSACD_SCDB;
272 #if defined(CONFIG_PXA3xx)
273 if (cpu_is_pxa3xx())
274 val &= ~SSACD_SCDX8;
275 #endif
276 switch (div) {
277 case PXA_SSP_CLK_SCDB_1:
278 val |= SSACD_SCDB;
279 break;
280 case PXA_SSP_CLK_SCDB_4:
281 break;
282 #if defined(CONFIG_PXA3xx)
283 case PXA_SSP_CLK_SCDB_8:
284 if (cpu_is_pxa3xx())
285 val |= SSACD_SCDX8;
286 else
287 return -EINVAL;
288 break;
289 #endif
290 default:
291 return -EINVAL;
292 }
293 ssp_write_reg(ssp, SSACD, val);
294 break;
295 case PXA_SSP_DIV_SCR:
296 ssp_set_scr(ssp, div);
297 break;
298 default:
299 return -ENODEV;
300 }
301
302 return 0;
303 }
304
305 /*
306 * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
307 */
308 static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai,
309 int pll_id, unsigned int freq_in, unsigned int freq_out)
310 {
311 struct ssp_priv *priv = cpu_dai->private_data;
312 struct ssp_device *ssp = priv->dev.ssp;
313 u32 ssacd = ssp_read_reg(ssp, SSACD) & ~0x70;
314
315 #if defined(CONFIG_PXA3xx)
316 if (cpu_is_pxa3xx())
317 ssp_write_reg(ssp, SSACDD, 0);
318 #endif
319
320 switch (freq_out) {
321 case 5622000:
322 break;
323 case 11345000:
324 ssacd |= (0x1 << 4);
325 break;
326 case 12235000:
327 ssacd |= (0x2 << 4);
328 break;
329 case 14857000:
330 ssacd |= (0x3 << 4);
331 break;
332 case 32842000:
333 ssacd |= (0x4 << 4);
334 break;
335 case 48000000:
336 ssacd |= (0x5 << 4);
337 break;
338 case 0:
339 /* Disable */
340 break;
341
342 default:
343 #ifdef CONFIG_PXA3xx
344 /* PXA3xx has a clock ditherer which can be used to generate
345 * a wider range of frequencies - calculate a value for it.
346 */
347 if (cpu_is_pxa3xx()) {
348 u32 val;
349 u64 tmp = 19968;
350 tmp *= 1000000;
351 do_div(tmp, freq_out);
352 val = tmp;
353
354 val = (val << 16) | 64;
355 ssp_write_reg(ssp, SSACDD, val);
356
357 ssacd |= (0x6 << 4);
358
359 dev_dbg(&ssp->pdev->dev,
360 "Using SSACDD %x to supply %uHz\n",
361 val, freq_out);
362 break;
363 }
364 #endif
365
366 return -EINVAL;
367 }
368
369 ssp_write_reg(ssp, SSACD, ssacd);
370
371 return 0;
372 }
373
374 /*
375 * Set the active slots in TDM/Network mode
376 */
377 static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
378 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
379 {
380 struct ssp_priv *priv = cpu_dai->private_data;
381 struct ssp_device *ssp = priv->dev.ssp;
382 u32 sscr0;
383
384 sscr0 = ssp_read_reg(ssp, SSCR0);
385 sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS);
386
387 /* set slot width */
388 if (slot_width > 16)
389 sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16);
390 else
391 sscr0 |= SSCR0_DataSize(slot_width);
392
393 if (slots > 1) {
394 /* enable network mode */
395 sscr0 |= SSCR0_MOD;
396
397 /* set number of active slots */
398 sscr0 |= SSCR0_SlotsPerFrm(slots);
399
400 /* set active slot mask */
401 ssp_write_reg(ssp, SSTSA, tx_mask);
402 ssp_write_reg(ssp, SSRSA, rx_mask);
403 }
404 ssp_write_reg(ssp, SSCR0, sscr0);
405
406 return 0;
407 }
408
409 /*
410 * Tristate the SSP DAI lines
411 */
412 static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
413 int tristate)
414 {
415 struct ssp_priv *priv = cpu_dai->private_data;
416 struct ssp_device *ssp = priv->dev.ssp;
417 u32 sscr1;
418
419 sscr1 = ssp_read_reg(ssp, SSCR1);
420 if (tristate)
421 sscr1 &= ~SSCR1_TTE;
422 else
423 sscr1 |= SSCR1_TTE;
424 ssp_write_reg(ssp, SSCR1, sscr1);
425
426 return 0;
427 }
428
429 /*
430 * Set up the SSP DAI format.
431 * The SSP Port must be inactive before calling this function as the
432 * physical interface format is changed.
433 */
434 static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
435 unsigned int fmt)
436 {
437 struct ssp_priv *priv = cpu_dai->private_data;
438 struct ssp_device *ssp = priv->dev.ssp;
439 u32 sscr0;
440 u32 sscr1;
441 u32 sspsp;
442
443 /* check if we need to change anything at all */
444 if (priv->dai_fmt == fmt)
445 return 0;
446
447 /* we can only change the settings if the port is not in use */
448 if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
449 dev_err(&ssp->pdev->dev,
450 "can't change hardware dai format: stream is in use");
451 return -EINVAL;
452 }
453
454 /* reset port settings */
455 sscr0 = ssp_read_reg(ssp, SSCR0) &
456 (SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
457 sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
458 sspsp = 0;
459
460 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
461 case SND_SOC_DAIFMT_CBM_CFM:
462 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR;
463 break;
464 case SND_SOC_DAIFMT_CBM_CFS:
465 sscr1 |= SSCR1_SCLKDIR;
466 break;
467 case SND_SOC_DAIFMT_CBS_CFS:
468 break;
469 default:
470 return -EINVAL;
471 }
472
473 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
474 case SND_SOC_DAIFMT_NB_NF:
475 sspsp |= SSPSP_SFRMP;
476 break;
477 case SND_SOC_DAIFMT_NB_IF:
478 break;
479 case SND_SOC_DAIFMT_IB_IF:
480 sspsp |= SSPSP_SCMODE(2);
481 break;
482 case SND_SOC_DAIFMT_IB_NF:
483 sspsp |= SSPSP_SCMODE(2) | SSPSP_SFRMP;
484 break;
485 default:
486 return -EINVAL;
487 }
488
489 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
490 case SND_SOC_DAIFMT_I2S:
491 sscr0 |= SSCR0_PSP;
492 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
493 /* See hw_params() */
494 break;
495
496 case SND_SOC_DAIFMT_DSP_A:
497 sspsp |= SSPSP_FSRT;
498 case SND_SOC_DAIFMT_DSP_B:
499 sscr0 |= SSCR0_MOD | SSCR0_PSP;
500 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
501 break;
502
503 default:
504 return -EINVAL;
505 }
506
507 ssp_write_reg(ssp, SSCR0, sscr0);
508 ssp_write_reg(ssp, SSCR1, sscr1);
509 ssp_write_reg(ssp, SSPSP, sspsp);
510
511 dump_registers(ssp);
512
513 /* Since we are configuring the timings for the format by hand
514 * we have to defer some things until hw_params() where we
515 * know parameters like the sample size.
516 */
517 priv->dai_fmt = fmt;
518
519 return 0;
520 }
521
522 /*
523 * Set the SSP audio DMA parameters and sample size.
524 * Can be called multiple times by oss emulation.
525 */
526 static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
527 struct snd_pcm_hw_params *params,
528 struct snd_soc_dai *dai)
529 {
530 struct snd_soc_pcm_runtime *rtd = substream->private_data;
531 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
532 struct ssp_priv *priv = cpu_dai->private_data;
533 struct ssp_device *ssp = priv->dev.ssp;
534 int chn = params_channels(params);
535 u32 sscr0;
536 u32 sspsp;
537 int width = snd_pcm_format_physical_width(params_format(params));
538 int ttsa = ssp_read_reg(ssp, SSTSA) & 0xf;
539
540 /* generate correct DMA params */
541 if (cpu_dai->dma_data)
542 kfree(cpu_dai->dma_data);
543
544 /* Network mode with one active slot (ttsa == 1) can be used
545 * to force 16-bit frame width on the wire (for S16_LE), even
546 * with two channels. Use 16-bit DMA transfers for this case.
547 */
548 cpu_dai->dma_data = ssp_get_dma_params(ssp,
549 ((chn == 2) && (ttsa != 1)) || (width == 32),
550 substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
551
552 /* we can only change the settings if the port is not in use */
553 if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
554 return 0;
555
556 /* clear selected SSP bits */
557 sscr0 = ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
558 ssp_write_reg(ssp, SSCR0, sscr0);
559
560 /* bit size */
561 sscr0 = ssp_read_reg(ssp, SSCR0);
562 switch (params_format(params)) {
563 case SNDRV_PCM_FORMAT_S16_LE:
564 #ifdef CONFIG_PXA3xx
565 if (cpu_is_pxa3xx())
566 sscr0 |= SSCR0_FPCKE;
567 #endif
568 sscr0 |= SSCR0_DataSize(16);
569 break;
570 case SNDRV_PCM_FORMAT_S24_LE:
571 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
572 break;
573 case SNDRV_PCM_FORMAT_S32_LE:
574 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
575 break;
576 }
577 ssp_write_reg(ssp, SSCR0, sscr0);
578
579 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
580 case SND_SOC_DAIFMT_I2S:
581 sspsp = ssp_read_reg(ssp, SSPSP);
582
583 if ((ssp_get_scr(ssp) == 4) && (width == 16)) {
584 /* This is a special case where the bitclk is 64fs
585 * and we're not dealing with 2*32 bits of audio
586 * samples.
587 *
588 * The SSP values used for that are all found out by
589 * trying and failing a lot; some of the registers
590 * needed for that mode are only available on PXA3xx.
591 */
592
593 #ifdef CONFIG_PXA3xx
594 if (!cpu_is_pxa3xx())
595 return -EINVAL;
596
597 sspsp |= SSPSP_SFRMWDTH(width * 2);
598 sspsp |= SSPSP_SFRMDLY(width * 4);
599 sspsp |= SSPSP_EDMYSTOP(3);
600 sspsp |= SSPSP_DMYSTOP(3);
601 sspsp |= SSPSP_DMYSTRT(1);
602 #else
603 return -EINVAL;
604 #endif
605 } else {
606 /* The frame width is the width the LRCLK is
607 * asserted for; the delay is expressed in
608 * half cycle units. We need the extra cycle
609 * because the data starts clocking out one BCLK
610 * after LRCLK changes polarity.
611 */
612 sspsp |= SSPSP_SFRMWDTH(width + 1);
613 sspsp |= SSPSP_SFRMDLY((width + 1) * 2);
614 sspsp |= SSPSP_DMYSTRT(1);
615 }
616
617 ssp_write_reg(ssp, SSPSP, sspsp);
618 break;
619 default:
620 break;
621 }
622
623 /* When we use a network mode, we always require TDM slots
624 * - complain loudly and fail if they've not been set up yet.
625 */
626 if ((sscr0 & SSCR0_MOD) && !ttsa) {
627 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
628 return -EINVAL;
629 }
630
631 dump_registers(ssp);
632
633 return 0;
634 }
635
636 static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
637 struct snd_soc_dai *dai)
638 {
639 struct snd_soc_pcm_runtime *rtd = substream->private_data;
640 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
641 int ret = 0;
642 struct ssp_priv *priv = cpu_dai->private_data;
643 struct ssp_device *ssp = priv->dev.ssp;
644 int val;
645
646 switch (cmd) {
647 case SNDRV_PCM_TRIGGER_RESUME:
648 ssp_enable(&priv->dev);
649 break;
650 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
651 val = ssp_read_reg(ssp, SSCR1);
652 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
653 val |= SSCR1_TSRE;
654 else
655 val |= SSCR1_RSRE;
656 ssp_write_reg(ssp, SSCR1, val);
657 val = ssp_read_reg(ssp, SSSR);
658 ssp_write_reg(ssp, SSSR, val);
659 break;
660 case SNDRV_PCM_TRIGGER_START:
661 val = ssp_read_reg(ssp, SSCR1);
662 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
663 val |= SSCR1_TSRE;
664 else
665 val |= SSCR1_RSRE;
666 ssp_write_reg(ssp, SSCR1, val);
667 ssp_enable(&priv->dev);
668 break;
669 case SNDRV_PCM_TRIGGER_STOP:
670 val = ssp_read_reg(ssp, SSCR1);
671 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
672 val &= ~SSCR1_TSRE;
673 else
674 val &= ~SSCR1_RSRE;
675 ssp_write_reg(ssp, SSCR1, val);
676 break;
677 case SNDRV_PCM_TRIGGER_SUSPEND:
678 ssp_disable(&priv->dev);
679 break;
680 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
681 val = ssp_read_reg(ssp, SSCR1);
682 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
683 val &= ~SSCR1_TSRE;
684 else
685 val &= ~SSCR1_RSRE;
686 ssp_write_reg(ssp, SSCR1, val);
687 break;
688
689 default:
690 ret = -EINVAL;
691 }
692
693 dump_registers(ssp);
694
695 return ret;
696 }
697
698 static int pxa_ssp_probe(struct platform_device *pdev,
699 struct snd_soc_dai *dai)
700 {
701 struct ssp_priv *priv;
702 int ret;
703
704 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
705 if (!priv)
706 return -ENOMEM;
707
708 priv->dev.ssp = ssp_request(dai->id + 1, "SoC audio");
709 if (priv->dev.ssp == NULL) {
710 ret = -ENODEV;
711 goto err_priv;
712 }
713
714 priv->dai_fmt = (unsigned int) -1;
715 dai->private_data = priv;
716
717 return 0;
718
719 err_priv:
720 kfree(priv);
721 return ret;
722 }
723
724 static void pxa_ssp_remove(struct platform_device *pdev,
725 struct snd_soc_dai *dai)
726 {
727 struct ssp_priv *priv = dai->private_data;
728 ssp_free(priv->dev.ssp);
729 }
730
731 #define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
732 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
733 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
734 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
735
736 #define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
737 SNDRV_PCM_FMTBIT_S24_LE | \
738 SNDRV_PCM_FMTBIT_S32_LE)
739
740 static struct snd_soc_dai_ops pxa_ssp_dai_ops = {
741 .startup = pxa_ssp_startup,
742 .shutdown = pxa_ssp_shutdown,
743 .trigger = pxa_ssp_trigger,
744 .hw_params = pxa_ssp_hw_params,
745 .set_sysclk = pxa_ssp_set_dai_sysclk,
746 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
747 .set_pll = pxa_ssp_set_dai_pll,
748 .set_fmt = pxa_ssp_set_dai_fmt,
749 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
750 .set_tristate = pxa_ssp_set_dai_tristate,
751 };
752
753 struct snd_soc_dai pxa_ssp_dai[] = {
754 {
755 .name = "pxa2xx-ssp1",
756 .id = 0,
757 .probe = pxa_ssp_probe,
758 .remove = pxa_ssp_remove,
759 .suspend = pxa_ssp_suspend,
760 .resume = pxa_ssp_resume,
761 .playback = {
762 .channels_min = 1,
763 .channels_max = 2,
764 .rates = PXA_SSP_RATES,
765 .formats = PXA_SSP_FORMATS,
766 },
767 .capture = {
768 .channels_min = 1,
769 .channels_max = 2,
770 .rates = PXA_SSP_RATES,
771 .formats = PXA_SSP_FORMATS,
772 },
773 .ops = &pxa_ssp_dai_ops,
774 },
775 { .name = "pxa2xx-ssp2",
776 .id = 1,
777 .probe = pxa_ssp_probe,
778 .remove = pxa_ssp_remove,
779 .suspend = pxa_ssp_suspend,
780 .resume = pxa_ssp_resume,
781 .playback = {
782 .channels_min = 1,
783 .channels_max = 2,
784 .rates = PXA_SSP_RATES,
785 .formats = PXA_SSP_FORMATS,
786 },
787 .capture = {
788 .channels_min = 1,
789 .channels_max = 2,
790 .rates = PXA_SSP_RATES,
791 .formats = PXA_SSP_FORMATS,
792 },
793 .ops = &pxa_ssp_dai_ops,
794 },
795 {
796 .name = "pxa2xx-ssp3",
797 .id = 2,
798 .probe = pxa_ssp_probe,
799 .remove = pxa_ssp_remove,
800 .suspend = pxa_ssp_suspend,
801 .resume = pxa_ssp_resume,
802 .playback = {
803 .channels_min = 1,
804 .channels_max = 2,
805 .rates = PXA_SSP_RATES,
806 .formats = PXA_SSP_FORMATS,
807 },
808 .capture = {
809 .channels_min = 1,
810 .channels_max = 2,
811 .rates = PXA_SSP_RATES,
812 .formats = PXA_SSP_FORMATS,
813 },
814 .ops = &pxa_ssp_dai_ops,
815 },
816 {
817 .name = "pxa2xx-ssp4",
818 .id = 3,
819 .probe = pxa_ssp_probe,
820 .remove = pxa_ssp_remove,
821 .suspend = pxa_ssp_suspend,
822 .resume = pxa_ssp_resume,
823 .playback = {
824 .channels_min = 1,
825 .channels_max = 2,
826 .rates = PXA_SSP_RATES,
827 .formats = PXA_SSP_FORMATS,
828 },
829 .capture = {
830 .channels_min = 1,
831 .channels_max = 2,
832 .rates = PXA_SSP_RATES,
833 .formats = PXA_SSP_FORMATS,
834 },
835 .ops = &pxa_ssp_dai_ops,
836 },
837 };
838 EXPORT_SYMBOL_GPL(pxa_ssp_dai);
839
840 static int __init pxa_ssp_init(void)
841 {
842 return snd_soc_register_dais(pxa_ssp_dai, ARRAY_SIZE(pxa_ssp_dai));
843 }
844 module_init(pxa_ssp_init);
845
846 static void __exit pxa_ssp_exit(void)
847 {
848 snd_soc_unregister_dais(pxa_ssp_dai, ARRAY_SIZE(pxa_ssp_dai));
849 }
850 module_exit(pxa_ssp_exit);
851
852 /* Module information */
853 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
854 MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
855 MODULE_LICENSE("GPL");
Linux for Ginger Game Console