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Revert "microblaze_mmu_v2: Update signal returning address"
[linux/fpc-iii.git] / sound / soc / pxa / pxa-ssp.c
blob4da5fc55c7ee81d81369fae163344e8058c96b86
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
37 #include "../../arm/pxa2xx-pcm.h"
38 #include "pxa-ssp.h"
39
40 /*
41 * SSP audio private data
42 */
43 struct ssp_priv {
44 struct ssp_device *ssp;
45 unsigned int sysclk;
46 int dai_fmt;
47 #ifdef CONFIG_PM
48 uint32_t cr0;
49 uint32_t cr1;
50 uint32_t to;
51 uint32_t psp;
52 #endif
53 };
54
55 static void dump_registers(struct ssp_device *ssp)
56 {
57 dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
58 pxa_ssp_read_reg(ssp, SSCR0), pxa_ssp_read_reg(ssp, SSCR1),
59 pxa_ssp_read_reg(ssp, SSTO));
60
61 dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
62 pxa_ssp_read_reg(ssp, SSPSP), pxa_ssp_read_reg(ssp, SSSR),
63 pxa_ssp_read_reg(ssp, SSACD));
64 }
65
66 static void pxa_ssp_enable(struct ssp_device *ssp)
67 {
68 uint32_t sscr0;
69
70 sscr0 = __raw_readl(ssp->mmio_base + SSCR0) | SSCR0_SSE;
71 __raw_writel(sscr0, ssp->mmio_base + SSCR0);
72 }
73
74 static void pxa_ssp_disable(struct ssp_device *ssp)
75 {
76 uint32_t sscr0;
77
78 sscr0 = __raw_readl(ssp->mmio_base + SSCR0) & ~SSCR0_SSE;
79 __raw_writel(sscr0, ssp->mmio_base + SSCR0);
80 }
81
82 struct pxa2xx_pcm_dma_data {
83 struct pxa2xx_pcm_dma_params params;
84 char name[20];
85 };
86
87 static void pxa_ssp_set_dma_params(struct ssp_device *ssp, int width4,
88 int out, struct pxa2xx_pcm_dma_params *dma_data)
89 {
90 struct pxa2xx_pcm_dma_data *dma;
91
92 dma = container_of(dma_data, struct pxa2xx_pcm_dma_data, params);
93
94 snprintf(dma->name, 20, "SSP%d PCM %s %s", ssp->port_id,
95 width4 ? "32-bit" : "16-bit", out ? "out" : "in");
96
97 dma->params.name = dma->name;
98 dma->params.drcmr = &DRCMR(out ? ssp->drcmr_tx : ssp->drcmr_rx);
99 dma->params.dcmd = (out ? (DCMD_INCSRCADDR | DCMD_FLOWTRG) :
100 (DCMD_INCTRGADDR | DCMD_FLOWSRC)) |
101 (width4 ? DCMD_WIDTH4 : DCMD_WIDTH2) | DCMD_BURST16;
102 dma->params.dev_addr = ssp->phys_base + SSDR;
103 }
104
105 static int pxa_ssp_startup(struct snd_pcm_substream *substream,
106 struct snd_soc_dai *cpu_dai)
107 {
108 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
109 struct ssp_device *ssp = priv->ssp;
110 struct pxa2xx_pcm_dma_data *dma;
111 int ret = 0;
112
113 if (!cpu_dai->active) {
114 clk_enable(ssp->clk);
115 pxa_ssp_disable(ssp);
116 }
117
118 dma = kzalloc(sizeof(struct pxa2xx_pcm_dma_data), GFP_KERNEL);
119 if (!dma)
120 return -ENOMEM;
121 snd_soc_dai_set_dma_data(cpu_dai, substream, &dma->params);
122
123 return ret;
124 }
125
126 static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
127 struct snd_soc_dai *cpu_dai)
128 {
129 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
130 struct ssp_device *ssp = priv->ssp;
131
132 if (!cpu_dai->active) {
133 pxa_ssp_disable(ssp);
134 clk_disable(ssp->clk);
135 }
136
137 kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
138 snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
139 }
140
141 #ifdef CONFIG_PM
142
143 static int pxa_ssp_suspend(struct snd_soc_dai *cpu_dai)
144 {
145 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
146 struct ssp_device *ssp = priv->ssp;
147
148 if (!cpu_dai->active)
149 clk_enable(ssp->clk);
150
151 priv->cr0 = __raw_readl(ssp->mmio_base + SSCR0);
152 priv->cr1 = __raw_readl(ssp->mmio_base + SSCR1);
153 priv->to = __raw_readl(ssp->mmio_base + SSTO);
154 priv->psp = __raw_readl(ssp->mmio_base + SSPSP);
155
156 pxa_ssp_disable(ssp);
157 clk_disable(ssp->clk);
158 return 0;
159 }
160
161 static int pxa_ssp_resume(struct snd_soc_dai *cpu_dai)
162 {
163 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
164 struct ssp_device *ssp = priv->ssp;
165 uint32_t sssr = SSSR_ROR | SSSR_TUR | SSSR_BCE;
166
167 clk_enable(ssp->clk);
168
169 __raw_writel(sssr, ssp->mmio_base + SSSR);
170 __raw_writel(priv->cr0 & ~SSCR0_SSE, ssp->mmio_base + SSCR0);
171 __raw_writel(priv->cr1, ssp->mmio_base + SSCR1);
172 __raw_writel(priv->to, ssp->mmio_base + SSTO);
173 __raw_writel(priv->psp, ssp->mmio_base + SSPSP);
174
175 if (cpu_dai->active)
176 pxa_ssp_enable(ssp);
177 else
178 clk_disable(ssp->clk);
179
180 return 0;
181 }
182
183 #else
184 #define pxa_ssp_suspend NULL
185 #define pxa_ssp_resume NULL
186 #endif
187
188 /**
189 * ssp_set_clkdiv - set SSP clock divider
190 * @div: serial clock rate divider
191 */
192 static void pxa_ssp_set_scr(struct ssp_device *ssp, u32 div)
193 {
194 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
195
196 if (ssp->type == PXA25x_SSP) {
197 sscr0 &= ~0x0000ff00;
198 sscr0 |= ((div - 2)/2) << 8; /* 2..512 */
199 } else {
200 sscr0 &= ~0x000fff00;
201 sscr0 |= (div - 1) << 8; /* 1..4096 */
202 }
203 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
204 }
205
206 /**
207 * pxa_ssp_get_clkdiv - get SSP clock divider
208 */
209 static u32 pxa_ssp_get_scr(struct ssp_device *ssp)
210 {
211 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
212 u32 div;
213
214 if (ssp->type == PXA25x_SSP)
215 div = ((sscr0 >> 8) & 0xff) * 2 + 2;
216 else
217 div = ((sscr0 >> 8) & 0xfff) + 1;
218 return div;
219 }
220
221 /*
222 * Set the SSP ports SYSCLK.
223 */
224 static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
225 int clk_id, unsigned int freq, int dir)
226 {
227 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
228 struct ssp_device *ssp = priv->ssp;
229 int val;
230
231 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
232 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
233
234 dev_dbg(&ssp->pdev->dev,
235 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %u\n",
236 cpu_dai->id, clk_id, freq);
237
238 switch (clk_id) {
239 case PXA_SSP_CLK_NET_PLL:
240 sscr0 |= SSCR0_MOD;
241 break;
242 case PXA_SSP_CLK_PLL:
243 /* Internal PLL is fixed */
244 if (ssp->type == PXA25x_SSP)
245 priv->sysclk = 1843200;
246 else
247 priv->sysclk = 13000000;
248 break;
249 case PXA_SSP_CLK_EXT:
250 priv->sysclk = freq;
251 sscr0 |= SSCR0_ECS;
252 break;
253 case PXA_SSP_CLK_NET:
254 priv->sysclk = freq;
255 sscr0 |= SSCR0_NCS | SSCR0_MOD;
256 break;
257 case PXA_SSP_CLK_AUDIO:
258 priv->sysclk = 0;
259 pxa_ssp_set_scr(ssp, 1);
260 sscr0 |= SSCR0_ACS;
261 break;
262 default:
263 return -ENODEV;
264 }
265
266 /* The SSP clock must be disabled when changing SSP clock mode
267 * on PXA2xx. On PXA3xx it must be enabled when doing so. */
268 if (ssp->type != PXA3xx_SSP)
269 clk_disable(ssp->clk);
270 val = pxa_ssp_read_reg(ssp, SSCR0) | sscr0;
271 pxa_ssp_write_reg(ssp, SSCR0, val);
272 if (ssp->type != PXA3xx_SSP)
273 clk_enable(ssp->clk);
274
275 return 0;
276 }
277
278 /*
279 * Set the SSP clock dividers.
280 */
281 static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
282 int div_id, int div)
283 {
284 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
285 struct ssp_device *ssp = priv->ssp;
286 int val;
287
288 switch (div_id) {
289 case PXA_SSP_AUDIO_DIV_ACDS:
290 val = (pxa_ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
291 pxa_ssp_write_reg(ssp, SSACD, val);
292 break;
293 case PXA_SSP_AUDIO_DIV_SCDB:
294 val = pxa_ssp_read_reg(ssp, SSACD);
295 val &= ~SSACD_SCDB;
296 if (ssp->type == PXA3xx_SSP)
297 val &= ~SSACD_SCDX8;
298 switch (div) {
299 case PXA_SSP_CLK_SCDB_1:
300 val |= SSACD_SCDB;
301 break;
302 case PXA_SSP_CLK_SCDB_4:
303 break;
304 case PXA_SSP_CLK_SCDB_8:
305 if (ssp->type == PXA3xx_SSP)
306 val |= SSACD_SCDX8;
307 else
308 return -EINVAL;
309 break;
310 default:
311 return -EINVAL;
312 }
313 pxa_ssp_write_reg(ssp, SSACD, val);
314 break;
315 case PXA_SSP_DIV_SCR:
316 pxa_ssp_set_scr(ssp, div);
317 break;
318 default:
319 return -ENODEV;
320 }
321
322 return 0;
323 }
324
325 /*
326 * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
327 */
328 static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
329 int source, unsigned int freq_in, unsigned int freq_out)
330 {
331 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
332 struct ssp_device *ssp = priv->ssp;
333 u32 ssacd = pxa_ssp_read_reg(ssp, SSACD) & ~0x70;
334
335 if (ssp->type == PXA3xx_SSP)
336 pxa_ssp_write_reg(ssp, SSACDD, 0);
337
338 switch (freq_out) {
339 case 5622000:
340 break;
341 case 11345000:
342 ssacd |= (0x1 << 4);
343 break;
344 case 12235000:
345 ssacd |= (0x2 << 4);
346 break;
347 case 14857000:
348 ssacd |= (0x3 << 4);
349 break;
350 case 32842000:
351 ssacd |= (0x4 << 4);
352 break;
353 case 48000000:
354 ssacd |= (0x5 << 4);
355 break;
356 case 0:
357 /* Disable */
358 break;
359
360 default:
361 /* PXA3xx has a clock ditherer which can be used to generate
362 * a wider range of frequencies - calculate a value for it.
363 */
364 if (ssp->type == PXA3xx_SSP) {
365 u32 val;
366 u64 tmp = 19968;
367 tmp *= 1000000;
368 do_div(tmp, freq_out);
369 val = tmp;
370
371 val = (val << 16) | 64;
372 pxa_ssp_write_reg(ssp, SSACDD, val);
373
374 ssacd |= (0x6 << 4);
375
376 dev_dbg(&ssp->pdev->dev,
377 "Using SSACDD %x to supply %uHz\n",
378 val, freq_out);
379 break;
380 }
381
382 return -EINVAL;
383 }
384
385 pxa_ssp_write_reg(ssp, SSACD, ssacd);
386
387 return 0;
388 }
389
390 /*
391 * Set the active slots in TDM/Network mode
392 */
393 static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
394 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
395 {
396 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
397 struct ssp_device *ssp = priv->ssp;
398 u32 sscr0;
399
400 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
401 sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS);
402
403 /* set slot width */
404 if (slot_width > 16)
405 sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16);
406 else
407 sscr0 |= SSCR0_DataSize(slot_width);
408
409 if (slots > 1) {
410 /* enable network mode */
411 sscr0 |= SSCR0_MOD;
412
413 /* set number of active slots */
414 sscr0 |= SSCR0_SlotsPerFrm(slots);
415
416 /* set active slot mask */
417 pxa_ssp_write_reg(ssp, SSTSA, tx_mask);
418 pxa_ssp_write_reg(ssp, SSRSA, rx_mask);
419 }
420 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
421
422 return 0;
423 }
424
425 /*
426 * Tristate the SSP DAI lines
427 */
428 static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
429 int tristate)
430 {
431 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
432 struct ssp_device *ssp = priv->ssp;
433 u32 sscr1;
434
435 sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
436 if (tristate)
437 sscr1 &= ~SSCR1_TTE;
438 else
439 sscr1 |= SSCR1_TTE;
440 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
441
442 return 0;
443 }
444
445 /*
446 * Set up the SSP DAI format.
447 * The SSP Port must be inactive before calling this function as the
448 * physical interface format is changed.
449 */
450 static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
451 unsigned int fmt)
452 {
453 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
454 struct ssp_device *ssp = priv->ssp;
455 u32 sscr0, sscr1, sspsp, scfr;
456
457 /* check if we need to change anything at all */
458 if (priv->dai_fmt == fmt)
459 return 0;
460
461 /* we can only change the settings if the port is not in use */
462 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
463 dev_err(&ssp->pdev->dev,
464 "can't change hardware dai format: stream is in use");
465 return -EINVAL;
466 }
467
468 /* reset port settings */
469 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
470 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
471 sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
472 sspsp = 0;
473
474 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
475 case SND_SOC_DAIFMT_CBM_CFM:
476 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR;
477 break;
478 case SND_SOC_DAIFMT_CBM_CFS:
479 sscr1 |= SSCR1_SCLKDIR | SSCR1_SCFR;
480 break;
481 case SND_SOC_DAIFMT_CBS_CFS:
482 break;
483 default:
484 return -EINVAL;
485 }
486
487 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
488 case SND_SOC_DAIFMT_NB_NF:
489 sspsp |= SSPSP_SFRMP;
490 break;
491 case SND_SOC_DAIFMT_NB_IF:
492 break;
493 case SND_SOC_DAIFMT_IB_IF:
494 sspsp |= SSPSP_SCMODE(2);
495 break;
496 case SND_SOC_DAIFMT_IB_NF:
497 sspsp |= SSPSP_SCMODE(2) | SSPSP_SFRMP;
498 break;
499 default:
500 return -EINVAL;
501 }
502
503 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
504 case SND_SOC_DAIFMT_I2S:
505 sscr0 |= SSCR0_PSP;
506 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
507 /* See hw_params() */
508 break;
509
510 case SND_SOC_DAIFMT_DSP_A:
511 sspsp |= SSPSP_FSRT;
512 case SND_SOC_DAIFMT_DSP_B:
513 sscr0 |= SSCR0_MOD | SSCR0_PSP;
514 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
515 break;
516
517 default:
518 return -EINVAL;
519 }
520
521 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
522 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
523 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
524
525 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
526 case SND_SOC_DAIFMT_CBM_CFM:
527 case SND_SOC_DAIFMT_CBM_CFS:
528 scfr = pxa_ssp_read_reg(ssp, SSCR1) | SSCR1_SCFR;
529 pxa_ssp_write_reg(ssp, SSCR1, scfr);
530
531 while (pxa_ssp_read_reg(ssp, SSSR) & SSSR_BSY)
532 cpu_relax();
533 break;
534 }
535
536 dump_registers(ssp);
537
538 /* Since we are configuring the timings for the format by hand
539 * we have to defer some things until hw_params() where we
540 * know parameters like the sample size.
541 */
542 priv->dai_fmt = fmt;
543
544 return 0;
545 }
546
547 /*
548 * Set the SSP audio DMA parameters and sample size.
549 * Can be called multiple times by oss emulation.
550 */
551 static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
552 struct snd_pcm_hw_params *params,
553 struct snd_soc_dai *cpu_dai)
554 {
555 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
556 struct ssp_device *ssp = priv->ssp;
557 int chn = params_channels(params);
558 u32 sscr0;
559 u32 sspsp;
560 int width = snd_pcm_format_physical_width(params_format(params));
561 int ttsa = pxa_ssp_read_reg(ssp, SSTSA) & 0xf;
562 struct pxa2xx_pcm_dma_params *dma_data;
563
564 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
565
566 /* Network mode with one active slot (ttsa == 1) can be used
567 * to force 16-bit frame width on the wire (for S16_LE), even
568 * with two channels. Use 16-bit DMA transfers for this case.
569 */
570 pxa_ssp_set_dma_params(ssp,
571 ((chn == 2) && (ttsa != 1)) || (width == 32),
572 substream->stream == SNDRV_PCM_STREAM_PLAYBACK, dma_data);
573
574 /* we can only change the settings if the port is not in use */
575 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
576 return 0;
577
578 /* clear selected SSP bits */
579 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
580
581 /* bit size */
582 switch (params_format(params)) {
583 case SNDRV_PCM_FORMAT_S16_LE:
584 if (ssp->type == PXA3xx_SSP)
585 sscr0 |= SSCR0_FPCKE;
586 sscr0 |= SSCR0_DataSize(16);
587 break;
588 case SNDRV_PCM_FORMAT_S24_LE:
589 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
590 break;
591 case SNDRV_PCM_FORMAT_S32_LE:
592 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
593 break;
594 }
595 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
596
597 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
598 case SND_SOC_DAIFMT_I2S:
599 sspsp = pxa_ssp_read_reg(ssp, SSPSP);
600
601 if ((pxa_ssp_get_scr(ssp) == 4) && (width == 16)) {
602 /* This is a special case where the bitclk is 64fs
603 * and we're not dealing with 2*32 bits of audio
604 * samples.
605 *
606 * The SSP values used for that are all found out by
607 * trying and failing a lot; some of the registers
608 * needed for that mode are only available on PXA3xx.
609 */
610 if (ssp->type != PXA3xx_SSP)
611 return -EINVAL;
612
613 sspsp |= SSPSP_SFRMWDTH(width * 2);
614 sspsp |= SSPSP_SFRMDLY(width * 4);
615 sspsp |= SSPSP_EDMYSTOP(3);
616 sspsp |= SSPSP_DMYSTOP(3);
617 sspsp |= SSPSP_DMYSTRT(1);
618 } else {
619 /* The frame width is the width the LRCLK is
620 * asserted for; the delay is expressed in
621 * half cycle units. We need the extra cycle
622 * because the data starts clocking out one BCLK
623 * after LRCLK changes polarity.
624 */
625 sspsp |= SSPSP_SFRMWDTH(width + 1);
626 sspsp |= SSPSP_SFRMDLY((width + 1) * 2);
627 sspsp |= SSPSP_DMYSTRT(1);
628 }
629
630 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
631 break;
632 default:
633 break;
634 }
635
636 /* When we use a network mode, we always require TDM slots
637 * - complain loudly and fail if they've not been set up yet.
638 */
639 if ((sscr0 & SSCR0_MOD) && !ttsa) {
640 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
641 return -EINVAL;
642 }
643
644 dump_registers(ssp);
645
646 return 0;
647 }
648
649 static void pxa_ssp_set_running_bit(struct snd_pcm_substream *substream,
650 struct ssp_device *ssp, int value)
651 {
652 uint32_t sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
653 uint32_t sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
654 uint32_t sspsp = pxa_ssp_read_reg(ssp, SSPSP);
655 uint32_t sssr = pxa_ssp_read_reg(ssp, SSSR);
656
657 if (value && (sscr0 & SSCR0_SSE))
658 pxa_ssp_write_reg(ssp, SSCR0, sscr0 & ~SSCR0_SSE);
659
660 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
661 if (value)
662 sscr1 |= SSCR1_TSRE;
663 else
664 sscr1 &= ~SSCR1_TSRE;
665 } else {
666 if (value)
667 sscr1 |= SSCR1_RSRE;
668 else
669 sscr1 &= ~SSCR1_RSRE;
670 }
671
672 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
673
674 if (value) {
675 pxa_ssp_write_reg(ssp, SSSR, sssr);
676 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
677 pxa_ssp_write_reg(ssp, SSCR0, sscr0 | SSCR0_SSE);
678 }
679 }
680
681 static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
682 struct snd_soc_dai *cpu_dai)
683 {
684 int ret = 0;
685 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
686 struct ssp_device *ssp = priv->ssp;
687 int val;
688
689 switch (cmd) {
690 case SNDRV_PCM_TRIGGER_RESUME:
691 pxa_ssp_enable(ssp);
692 break;
693 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
694 pxa_ssp_set_running_bit(substream, ssp, 1);
695 val = pxa_ssp_read_reg(ssp, SSSR);
696 pxa_ssp_write_reg(ssp, SSSR, val);
697 break;
698 case SNDRV_PCM_TRIGGER_START:
699 pxa_ssp_set_running_bit(substream, ssp, 1);
700 break;
701 case SNDRV_PCM_TRIGGER_STOP:
702 pxa_ssp_set_running_bit(substream, ssp, 0);
703 break;
704 case SNDRV_PCM_TRIGGER_SUSPEND:
705 pxa_ssp_disable(ssp);
706 break;
707 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
708 pxa_ssp_set_running_bit(substream, ssp, 0);
709 break;
710
711 default:
712 ret = -EINVAL;
713 }
714
715 dump_registers(ssp);
716
717 return ret;
718 }
719
720 static int pxa_ssp_probe(struct snd_soc_dai *dai)
721 {
722 struct ssp_priv *priv;
723 int ret;
724
725 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
726 if (!priv)
727 return -ENOMEM;
728
729 priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
730 if (priv->ssp == NULL) {
731 ret = -ENODEV;
732 goto err_priv;
733 }
734
735 priv->dai_fmt = (unsigned int) -1;
736 snd_soc_dai_set_drvdata(dai, priv);
737
738 return 0;
739
740 err_priv:
741 kfree(priv);
742 return ret;
743 }
744
745 static int pxa_ssp_remove(struct snd_soc_dai *dai)
746 {
747 struct ssp_priv *priv = snd_soc_dai_get_drvdata(dai);
748
749 pxa_ssp_free(priv->ssp);
750 kfree(priv);
751 return 0;
752 }
753
754 #define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
755 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
756 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
757 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
758 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
759
760 #define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
761 SNDRV_PCM_FMTBIT_S24_LE | \
762 SNDRV_PCM_FMTBIT_S32_LE)
763
764 static const struct snd_soc_dai_ops pxa_ssp_dai_ops = {
765 .startup = pxa_ssp_startup,
766 .shutdown = pxa_ssp_shutdown,
767 .trigger = pxa_ssp_trigger,
768 .hw_params = pxa_ssp_hw_params,
769 .set_sysclk = pxa_ssp_set_dai_sysclk,
770 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
771 .set_pll = pxa_ssp_set_dai_pll,
772 .set_fmt = pxa_ssp_set_dai_fmt,
773 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
774 .set_tristate = pxa_ssp_set_dai_tristate,
775 };
776
777 static struct snd_soc_dai_driver pxa_ssp_dai = {
778 .probe = pxa_ssp_probe,
779 .remove = pxa_ssp_remove,
780 .suspend = pxa_ssp_suspend,
781 .resume = pxa_ssp_resume,
782 .playback = {
783 .channels_min = 1,
784 .channels_max = 8,
785 .rates = PXA_SSP_RATES,
786 .formats = PXA_SSP_FORMATS,
787 },
788 .capture = {
789 .channels_min = 1,
790 .channels_max = 8,
791 .rates = PXA_SSP_RATES,
792 .formats = PXA_SSP_FORMATS,
793 },
794 .ops = &pxa_ssp_dai_ops,
795 };
796
797 static __devinit int asoc_ssp_probe(struct platform_device *pdev)
798 {
799 return snd_soc_register_dai(&pdev->dev, &pxa_ssp_dai);
800 }
801
802 static int __devexit asoc_ssp_remove(struct platform_device *pdev)
803 {
804 snd_soc_unregister_dai(&pdev->dev);
805 return 0;
806 }
807
808 static struct platform_driver asoc_ssp_driver = {
809 .driver = {
810 .name = "pxa-ssp-dai",
811 .owner = THIS_MODULE,
812 },
813
814 .probe = asoc_ssp_probe,
815 .remove = __devexit_p(asoc_ssp_remove),
816 };
817
818 module_platform_driver(asoc_ssp_driver);
819
820 /* Module information */
821 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
822 MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
823 MODULE_LICENSE("GPL");
Linux with added FPC-III support