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x86: Fix S4 regression
[linux-btrfs-devel.git] / sound / soc / pxa / pxa-ssp.c
blob8ad93ee2e92bfe312157b46eabbe251b9db35f9d
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/slab.h>
20 #include <linux/platform_device.h>
21 #include <linux/clk.h>
22 #include <linux/io.h>
23 #include <linux/pxa2xx_ssp.h>
24
25 #include <asm/irq.h>
26
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29 #include <sound/initval.h>
30 #include <sound/pcm_params.h>
31 #include <sound/soc.h>
32 #include <sound/pxa2xx-lib.h>
33
34 #include <mach/hardware.h>
35 #include <mach/dma.h>
36 #include <mach/audio.h>
37
38 #include "../../arm/pxa2xx-pcm.h"
39 #include "pxa-ssp.h"
40
41 /*
42 * SSP audio private data
43 */
44 struct ssp_priv {
45 struct ssp_device *ssp;
46 unsigned int sysclk;
47 int dai_fmt;
48 #ifdef CONFIG_PM
49 uint32_t cr0;
50 uint32_t cr1;
51 uint32_t to;
52 uint32_t psp;
53 #endif
54 };
55
56 static void dump_registers(struct ssp_device *ssp)
57 {
58 dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
59 pxa_ssp_read_reg(ssp, SSCR0), pxa_ssp_read_reg(ssp, SSCR1),
60 pxa_ssp_read_reg(ssp, SSTO));
61
62 dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
63 pxa_ssp_read_reg(ssp, SSPSP), pxa_ssp_read_reg(ssp, SSSR),
64 pxa_ssp_read_reg(ssp, SSACD));
65 }
66
67 static void pxa_ssp_enable(struct ssp_device *ssp)
68 {
69 uint32_t sscr0;
70
71 sscr0 = __raw_readl(ssp->mmio_base + SSCR0) | SSCR0_SSE;
72 __raw_writel(sscr0, ssp->mmio_base + SSCR0);
73 }
74
75 static void pxa_ssp_disable(struct ssp_device *ssp)
76 {
77 uint32_t sscr0;
78
79 sscr0 = __raw_readl(ssp->mmio_base + SSCR0) & ~SSCR0_SSE;
80 __raw_writel(sscr0, ssp->mmio_base + SSCR0);
81 }
82
83 struct pxa2xx_pcm_dma_data {
84 struct pxa2xx_pcm_dma_params params;
85 char name[20];
86 };
87
88 static struct pxa2xx_pcm_dma_params *
89 pxa_ssp_get_dma_params(struct ssp_device *ssp, int width4, int out)
90 {
91 struct pxa2xx_pcm_dma_data *dma;
92
93 dma = kzalloc(sizeof(struct pxa2xx_pcm_dma_data), GFP_KERNEL);
94 if (dma == NULL)
95 return NULL;
96
97 snprintf(dma->name, 20, "SSP%d PCM %s %s", ssp->port_id,
98 width4 ? "32-bit" : "16-bit", out ? "out" : "in");
99
100 dma->params.name = dma->name;
101 dma->params.drcmr = &DRCMR(out ? ssp->drcmr_tx : ssp->drcmr_rx);
102 dma->params.dcmd = (out ? (DCMD_INCSRCADDR | DCMD_FLOWTRG) :
103 (DCMD_INCTRGADDR | DCMD_FLOWSRC)) |
104 (width4 ? DCMD_WIDTH4 : DCMD_WIDTH2) | DCMD_BURST16;
105 dma->params.dev_addr = ssp->phys_base + SSDR;
106
107 return &dma->params;
108 }
109
110 static int pxa_ssp_startup(struct snd_pcm_substream *substream,
111 struct snd_soc_dai *cpu_dai)
112 {
113 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
114 struct ssp_device *ssp = priv->ssp;
115 int ret = 0;
116
117 if (!cpu_dai->active) {
118 clk_enable(ssp->clk);
119 pxa_ssp_disable(ssp);
120 }
121
122 kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
123 snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
124
125 return ret;
126 }
127
128 static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
129 struct snd_soc_dai *cpu_dai)
130 {
131 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
132 struct ssp_device *ssp = priv->ssp;
133
134 if (!cpu_dai->active) {
135 pxa_ssp_disable(ssp);
136 clk_disable(ssp->clk);
137 }
138
139 kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
140 snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
141 }
142
143 #ifdef CONFIG_PM
144
145 static int pxa_ssp_suspend(struct snd_soc_dai *cpu_dai)
146 {
147 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
148 struct ssp_device *ssp = priv->ssp;
149
150 if (!cpu_dai->active)
151 clk_enable(ssp->clk);
152
153 priv->cr0 = __raw_readl(ssp->mmio_base + SSCR0);
154 priv->cr1 = __raw_readl(ssp->mmio_base + SSCR1);
155 priv->to = __raw_readl(ssp->mmio_base + SSTO);
156 priv->psp = __raw_readl(ssp->mmio_base + SSPSP);
157
158 pxa_ssp_disable(ssp);
159 clk_disable(ssp->clk);
160 return 0;
161 }
162
163 static int pxa_ssp_resume(struct snd_soc_dai *cpu_dai)
164 {
165 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
166 struct ssp_device *ssp = priv->ssp;
167 uint32_t sssr = SSSR_ROR | SSSR_TUR | SSSR_BCE;
168
169 clk_enable(ssp->clk);
170
171 __raw_writel(sssr, ssp->mmio_base + SSSR);
172 __raw_writel(priv->cr0 & ~SSCR0_SSE, ssp->mmio_base + SSCR0);
173 __raw_writel(priv->cr1, ssp->mmio_base + SSCR1);
174 __raw_writel(priv->to, ssp->mmio_base + SSTO);
175 __raw_writel(priv->psp, ssp->mmio_base + SSPSP);
176
177 if (cpu_dai->active)
178 pxa_ssp_enable(ssp);
179 else
180 clk_disable(ssp->clk);
181
182 return 0;
183 }
184
185 #else
186 #define pxa_ssp_suspend NULL
187 #define pxa_ssp_resume NULL
188 #endif
189
190 /**
191 * ssp_set_clkdiv - set SSP clock divider
192 * @div: serial clock rate divider
193 */
194 static void pxa_ssp_set_scr(struct ssp_device *ssp, u32 div)
195 {
196 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
197
198 if (cpu_is_pxa25x() && ssp->type == PXA25x_SSP) {
199 sscr0 &= ~0x0000ff00;
200 sscr0 |= ((div - 2)/2) << 8; /* 2..512 */
201 } else {
202 sscr0 &= ~0x000fff00;
203 sscr0 |= (div - 1) << 8; /* 1..4096 */
204 }
205 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
206 }
207
208 /**
209 * pxa_ssp_get_clkdiv - get SSP clock divider
210 */
211 static u32 pxa_ssp_get_scr(struct ssp_device *ssp)
212 {
213 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
214 u32 div;
215
216 if (cpu_is_pxa25x() && ssp->type == PXA25x_SSP)
217 div = ((sscr0 >> 8) & 0xff) * 2 + 2;
218 else
219 div = ((sscr0 >> 8) & 0xfff) + 1;
220 return div;
221 }
222
223 /*
224 * Set the SSP ports SYSCLK.
225 */
226 static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
227 int clk_id, unsigned int freq, int dir)
228 {
229 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
230 struct ssp_device *ssp = priv->ssp;
231 int val;
232
233 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
234 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
235
236 dev_dbg(&ssp->pdev->dev,
237 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %u\n",
238 cpu_dai->id, clk_id, freq);
239
240 switch (clk_id) {
241 case PXA_SSP_CLK_NET_PLL:
242 sscr0 |= SSCR0_MOD;
243 break;
244 case PXA_SSP_CLK_PLL:
245 /* Internal PLL is fixed */
246 if (cpu_is_pxa25x())
247 priv->sysclk = 1843200;
248 else
249 priv->sysclk = 13000000;
250 break;
251 case PXA_SSP_CLK_EXT:
252 priv->sysclk = freq;
253 sscr0 |= SSCR0_ECS;
254 break;
255 case PXA_SSP_CLK_NET:
256 priv->sysclk = freq;
257 sscr0 |= SSCR0_NCS | SSCR0_MOD;
258 break;
259 case PXA_SSP_CLK_AUDIO:
260 priv->sysclk = 0;
261 pxa_ssp_set_scr(ssp, 1);
262 sscr0 |= SSCR0_ACS;
263 break;
264 default:
265 return -ENODEV;
266 }
267
268 /* The SSP clock must be disabled when changing SSP clock mode
269 * on PXA2xx. On PXA3xx it must be enabled when doing so. */
270 if (!cpu_is_pxa3xx())
271 clk_disable(ssp->clk);
272 val = pxa_ssp_read_reg(ssp, SSCR0) | sscr0;
273 pxa_ssp_write_reg(ssp, SSCR0, val);
274 if (!cpu_is_pxa3xx())
275 clk_enable(ssp->clk);
276
277 return 0;
278 }
279
280 /*
281 * Set the SSP clock dividers.
282 */
283 static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
284 int div_id, int div)
285 {
286 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
287 struct ssp_device *ssp = priv->ssp;
288 int val;
289
290 switch (div_id) {
291 case PXA_SSP_AUDIO_DIV_ACDS:
292 val = (pxa_ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
293 pxa_ssp_write_reg(ssp, SSACD, val);
294 break;
295 case PXA_SSP_AUDIO_DIV_SCDB:
296 val = pxa_ssp_read_reg(ssp, SSACD);
297 val &= ~SSACD_SCDB;
298 #if defined(CONFIG_PXA3xx)
299 if (cpu_is_pxa3xx())
300 val &= ~SSACD_SCDX8;
301 #endif
302 switch (div) {
303 case PXA_SSP_CLK_SCDB_1:
304 val |= SSACD_SCDB;
305 break;
306 case PXA_SSP_CLK_SCDB_4:
307 break;
308 #if defined(CONFIG_PXA3xx)
309 case PXA_SSP_CLK_SCDB_8:
310 if (cpu_is_pxa3xx())
311 val |= SSACD_SCDX8;
312 else
313 return -EINVAL;
314 break;
315 #endif
316 default:
317 return -EINVAL;
318 }
319 pxa_ssp_write_reg(ssp, SSACD, val);
320 break;
321 case PXA_SSP_DIV_SCR:
322 pxa_ssp_set_scr(ssp, div);
323 break;
324 default:
325 return -ENODEV;
326 }
327
328 return 0;
329 }
330
331 /*
332 * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
333 */
334 static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
335 int source, unsigned int freq_in, unsigned int freq_out)
336 {
337 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
338 struct ssp_device *ssp = priv->ssp;
339 u32 ssacd = pxa_ssp_read_reg(ssp, SSACD) & ~0x70;
340
341 #if defined(CONFIG_PXA3xx)
342 if (cpu_is_pxa3xx())
343 pxa_ssp_write_reg(ssp, SSACDD, 0);
344 #endif
345
346 switch (freq_out) {
347 case 5622000:
348 break;
349 case 11345000:
350 ssacd |= (0x1 << 4);
351 break;
352 case 12235000:
353 ssacd |= (0x2 << 4);
354 break;
355 case 14857000:
356 ssacd |= (0x3 << 4);
357 break;
358 case 32842000:
359 ssacd |= (0x4 << 4);
360 break;
361 case 48000000:
362 ssacd |= (0x5 << 4);
363 break;
364 case 0:
365 /* Disable */
366 break;
367
368 default:
369 #ifdef CONFIG_PXA3xx
370 /* PXA3xx has a clock ditherer which can be used to generate
371 * a wider range of frequencies - calculate a value for it.
372 */
373 if (cpu_is_pxa3xx()) {
374 u32 val;
375 u64 tmp = 19968;
376 tmp *= 1000000;
377 do_div(tmp, freq_out);
378 val = tmp;
379
380 val = (val << 16) | 64;
381 pxa_ssp_write_reg(ssp, SSACDD, val);
382
383 ssacd |= (0x6 << 4);
384
385 dev_dbg(&ssp->pdev->dev,
386 "Using SSACDD %x to supply %uHz\n",
387 val, freq_out);
388 break;
389 }
390 #endif
391
392 return -EINVAL;
393 }
394
395 pxa_ssp_write_reg(ssp, SSACD, ssacd);
396
397 return 0;
398 }
399
400 /*
401 * Set the active slots in TDM/Network mode
402 */
403 static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
404 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
405 {
406 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
407 struct ssp_device *ssp = priv->ssp;
408 u32 sscr0;
409
410 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
411 sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS);
412
413 /* set slot width */
414 if (slot_width > 16)
415 sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16);
416 else
417 sscr0 |= SSCR0_DataSize(slot_width);
418
419 if (slots > 1) {
420 /* enable network mode */
421 sscr0 |= SSCR0_MOD;
422
423 /* set number of active slots */
424 sscr0 |= SSCR0_SlotsPerFrm(slots);
425
426 /* set active slot mask */
427 pxa_ssp_write_reg(ssp, SSTSA, tx_mask);
428 pxa_ssp_write_reg(ssp, SSRSA, rx_mask);
429 }
430 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
431
432 return 0;
433 }
434
435 /*
436 * Tristate the SSP DAI lines
437 */
438 static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
439 int tristate)
440 {
441 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
442 struct ssp_device *ssp = priv->ssp;
443 u32 sscr1;
444
445 sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
446 if (tristate)
447 sscr1 &= ~SSCR1_TTE;
448 else
449 sscr1 |= SSCR1_TTE;
450 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
451
452 return 0;
453 }
454
455 /*
456 * Set up the SSP DAI format.
457 * The SSP Port must be inactive before calling this function as the
458 * physical interface format is changed.
459 */
460 static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
461 unsigned int fmt)
462 {
463 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
464 struct ssp_device *ssp = priv->ssp;
465 u32 sscr0, sscr1, sspsp, scfr;
466
467 /* check if we need to change anything at all */
468 if (priv->dai_fmt == fmt)
469 return 0;
470
471 /* we can only change the settings if the port is not in use */
472 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
473 dev_err(&ssp->pdev->dev,
474 "can't change hardware dai format: stream is in use");
475 return -EINVAL;
476 }
477
478 /* reset port settings */
479 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
480 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
481 sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
482 sspsp = 0;
483
484 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
485 case SND_SOC_DAIFMT_CBM_CFM:
486 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR;
487 break;
488 case SND_SOC_DAIFMT_CBM_CFS:
489 sscr1 |= SSCR1_SCLKDIR | SSCR1_SCFR;
490 break;
491 case SND_SOC_DAIFMT_CBS_CFS:
492 break;
493 default:
494 return -EINVAL;
495 }
496
497 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
498 case SND_SOC_DAIFMT_NB_NF:
499 sspsp |= SSPSP_SFRMP;
500 break;
501 case SND_SOC_DAIFMT_NB_IF:
502 break;
503 case SND_SOC_DAIFMT_IB_IF:
504 sspsp |= SSPSP_SCMODE(2);
505 break;
506 case SND_SOC_DAIFMT_IB_NF:
507 sspsp |= SSPSP_SCMODE(2) | SSPSP_SFRMP;
508 break;
509 default:
510 return -EINVAL;
511 }
512
513 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
514 case SND_SOC_DAIFMT_I2S:
515 sscr0 |= SSCR0_PSP;
516 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
517 /* See hw_params() */
518 break;
519
520 case SND_SOC_DAIFMT_DSP_A:
521 sspsp |= SSPSP_FSRT;
522 case SND_SOC_DAIFMT_DSP_B:
523 sscr0 |= SSCR0_MOD | SSCR0_PSP;
524 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
525 break;
526
527 default:
528 return -EINVAL;
529 }
530
531 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
532 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
533 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
534
535 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
536 case SND_SOC_DAIFMT_CBM_CFM:
537 case SND_SOC_DAIFMT_CBM_CFS:
538 scfr = pxa_ssp_read_reg(ssp, SSCR1) | SSCR1_SCFR;
539 pxa_ssp_write_reg(ssp, SSCR1, scfr);
540
541 while (pxa_ssp_read_reg(ssp, SSSR) & SSSR_BSY)
542 cpu_relax();
543 break;
544 }
545
546 dump_registers(ssp);
547
548 /* Since we are configuring the timings for the format by hand
549 * we have to defer some things until hw_params() where we
550 * know parameters like the sample size.
551 */
552 priv->dai_fmt = fmt;
553
554 return 0;
555 }
556
557 /*
558 * Set the SSP audio DMA parameters and sample size.
559 * Can be called multiple times by oss emulation.
560 */
561 static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
562 struct snd_pcm_hw_params *params,
563 struct snd_soc_dai *cpu_dai)
564 {
565 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
566 struct ssp_device *ssp = priv->ssp;
567 int chn = params_channels(params);
568 u32 sscr0;
569 u32 sspsp;
570 int width = snd_pcm_format_physical_width(params_format(params));
571 int ttsa = pxa_ssp_read_reg(ssp, SSTSA) & 0xf;
572 struct pxa2xx_pcm_dma_params *dma_data;
573
574 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
575
576 /* generate correct DMA params */
577 kfree(dma_data);
578
579 /* Network mode with one active slot (ttsa == 1) can be used
580 * to force 16-bit frame width on the wire (for S16_LE), even
581 * with two channels. Use 16-bit DMA transfers for this case.
582 */
583 dma_data = pxa_ssp_get_dma_params(ssp,
584 ((chn == 2) && (ttsa != 1)) || (width == 32),
585 substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
586
587 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
588
589 /* we can only change the settings if the port is not in use */
590 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
591 return 0;
592
593 /* clear selected SSP bits */
594 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
595
596 /* bit size */
597 switch (params_format(params)) {
598 case SNDRV_PCM_FORMAT_S16_LE:
599 #ifdef CONFIG_PXA3xx
600 if (cpu_is_pxa3xx())
601 sscr0 |= SSCR0_FPCKE;
602 #endif
603 sscr0 |= SSCR0_DataSize(16);
604 break;
605 case SNDRV_PCM_FORMAT_S24_LE:
606 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
607 break;
608 case SNDRV_PCM_FORMAT_S32_LE:
609 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
610 break;
611 }
612 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
613
614 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
615 case SND_SOC_DAIFMT_I2S:
616 sspsp = pxa_ssp_read_reg(ssp, SSPSP);
617
618 if ((pxa_ssp_get_scr(ssp) == 4) && (width == 16)) {
619 /* This is a special case where the bitclk is 64fs
620 * and we're not dealing with 2*32 bits of audio
621 * samples.
622 *
623 * The SSP values used for that are all found out by
624 * trying and failing a lot; some of the registers
625 * needed for that mode are only available on PXA3xx.
626 */
627
628 #ifdef CONFIG_PXA3xx
629 if (!cpu_is_pxa3xx())
630 return -EINVAL;
631
632 sspsp |= SSPSP_SFRMWDTH(width * 2);
633 sspsp |= SSPSP_SFRMDLY(width * 4);
634 sspsp |= SSPSP_EDMYSTOP(3);
635 sspsp |= SSPSP_DMYSTOP(3);
636 sspsp |= SSPSP_DMYSTRT(1);
637 #else
638 return -EINVAL;
639 #endif
640 } else {
641 /* The frame width is the width the LRCLK is
642 * asserted for; the delay is expressed in
643 * half cycle units. We need the extra cycle
644 * because the data starts clocking out one BCLK
645 * after LRCLK changes polarity.
646 */
647 sspsp |= SSPSP_SFRMWDTH(width + 1);
648 sspsp |= SSPSP_SFRMDLY((width + 1) * 2);
649 sspsp |= SSPSP_DMYSTRT(1);
650 }
651
652 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
653 break;
654 default:
655 break;
656 }
657
658 /* When we use a network mode, we always require TDM slots
659 * - complain loudly and fail if they've not been set up yet.
660 */
661 if ((sscr0 & SSCR0_MOD) && !ttsa) {
662 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
663 return -EINVAL;
664 }
665
666 dump_registers(ssp);
667
668 return 0;
669 }
670
671 static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
672 struct snd_soc_dai *cpu_dai)
673 {
674 int ret = 0;
675 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
676 struct ssp_device *ssp = priv->ssp;
677 int val;
678
679 switch (cmd) {
680 case SNDRV_PCM_TRIGGER_RESUME:
681 pxa_ssp_enable(ssp);
682 break;
683 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
684 val = pxa_ssp_read_reg(ssp, SSCR1);
685 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
686 val |= SSCR1_TSRE;
687 else
688 val |= SSCR1_RSRE;
689 pxa_ssp_write_reg(ssp, SSCR1, val);
690 val = pxa_ssp_read_reg(ssp, SSSR);
691 pxa_ssp_write_reg(ssp, SSSR, val);
692 break;
693 case SNDRV_PCM_TRIGGER_START:
694 val = pxa_ssp_read_reg(ssp, SSCR1);
695 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
696 val |= SSCR1_TSRE;
697 else
698 val |= SSCR1_RSRE;
699 pxa_ssp_write_reg(ssp, SSCR1, val);
700 pxa_ssp_enable(ssp);
701 break;
702 case SNDRV_PCM_TRIGGER_STOP:
703 val = pxa_ssp_read_reg(ssp, SSCR1);
704 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
705 val &= ~SSCR1_TSRE;
706 else
707 val &= ~SSCR1_RSRE;
708 pxa_ssp_write_reg(ssp, SSCR1, val);
709 break;
710 case SNDRV_PCM_TRIGGER_SUSPEND:
711 pxa_ssp_disable(ssp);
712 break;
713 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
714 val = pxa_ssp_read_reg(ssp, SSCR1);
715 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
716 val &= ~SSCR1_TSRE;
717 else
718 val &= ~SSCR1_RSRE;
719 pxa_ssp_write_reg(ssp, SSCR1, val);
720 break;
721
722 default:
723 ret = -EINVAL;
724 }
725
726 dump_registers(ssp);
727
728 return ret;
729 }
730
731 static int pxa_ssp_probe(struct snd_soc_dai *dai)
732 {
733 struct ssp_priv *priv;
734 int ret;
735
736 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
737 if (!priv)
738 return -ENOMEM;
739
740 priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
741 if (priv->ssp == NULL) {
742 ret = -ENODEV;
743 goto err_priv;
744 }
745
746 priv->dai_fmt = (unsigned int) -1;
747 snd_soc_dai_set_drvdata(dai, priv);
748
749 return 0;
750
751 err_priv:
752 kfree(priv);
753 return ret;
754 }
755
756 static int pxa_ssp_remove(struct snd_soc_dai *dai)
757 {
758 struct ssp_priv *priv = snd_soc_dai_get_drvdata(dai);
759
760 pxa_ssp_free(priv->ssp);
761 kfree(priv);
762 return 0;
763 }
764
765 #define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
766 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
767 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
768 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
769
770 #define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
771 SNDRV_PCM_FMTBIT_S24_LE | \
772 SNDRV_PCM_FMTBIT_S32_LE)
773
774 static struct snd_soc_dai_ops pxa_ssp_dai_ops = {
775 .startup = pxa_ssp_startup,
776 .shutdown = pxa_ssp_shutdown,
777 .trigger = pxa_ssp_trigger,
778 .hw_params = pxa_ssp_hw_params,
779 .set_sysclk = pxa_ssp_set_dai_sysclk,
780 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
781 .set_pll = pxa_ssp_set_dai_pll,
782 .set_fmt = pxa_ssp_set_dai_fmt,
783 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
784 .set_tristate = pxa_ssp_set_dai_tristate,
785 };
786
787 static struct snd_soc_dai_driver pxa_ssp_dai = {
788 .probe = pxa_ssp_probe,
789 .remove = pxa_ssp_remove,
790 .suspend = pxa_ssp_suspend,
791 .resume = pxa_ssp_resume,
792 .playback = {
793 .channels_min = 1,
794 .channels_max = 8,
795 .rates = PXA_SSP_RATES,
796 .formats = PXA_SSP_FORMATS,
797 },
798 .capture = {
799 .channels_min = 1,
800 .channels_max = 8,
801 .rates = PXA_SSP_RATES,
802 .formats = PXA_SSP_FORMATS,
803 },
804 .ops = &pxa_ssp_dai_ops,
805 };
806
807 static __devinit int asoc_ssp_probe(struct platform_device *pdev)
808 {
809 return snd_soc_register_dai(&pdev->dev, &pxa_ssp_dai);
810 }
811
812 static int __devexit asoc_ssp_remove(struct platform_device *pdev)
813 {
814 snd_soc_unregister_dai(&pdev->dev);
815 return 0;
816 }
817
818 static struct platform_driver asoc_ssp_driver = {
819 .driver = {
820 .name = "pxa-ssp-dai",
821 .owner = THIS_MODULE,
822 },
823
824 .probe = asoc_ssp_probe,
825 .remove = __devexit_p(asoc_ssp_remove),
826 };
827
828 static int __init pxa_ssp_init(void)
829 {
830 return platform_driver_register(&asoc_ssp_driver);
831 }
832 module_init(pxa_ssp_init);
833
834 static void __exit pxa_ssp_exit(void)
835 {
836 platform_driver_unregister(&asoc_ssp_driver);
837 }
838 module_exit(pxa_ssp_exit);
839
840 /* Module information */
841 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
842 MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
843 MODULE_LICENSE("GPL");
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