1 #define DEBUG
2 /*
3 * pxa-ssp.c -- ALSA Soc Audio Layer
4 *
5 * Copyright 2005,2008 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood
7 * Mark Brown <broonie@opensource.wolfsonmicro.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * TODO:
15 * o Test network mode for > 16bit sample size
16 */
17
18 #include <linux/init.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/clk.h>
22 #include <linux/io.h>
23
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/initval.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29 #include <sound/pxa2xx-lib.h>
30
31 #include <mach/hardware.h>
32 #include <mach/pxa-regs.h>
33 #include <mach/regs-ssp.h>
34 #include <mach/audio.h>
35 #include <mach/ssp.h>
36
37 #include "pxa2xx-pcm.h"
38 #include "pxa-ssp.h"
39
40 /*
41 * SSP audio private data
42 */
43 struct ssp_priv {
44 struct ssp_dev dev;
45 unsigned int sysclk;
46 int dai_fmt;
47 #ifdef CONFIG_PM
48 struct ssp_state state;
49 #endif
50 };
51
52 #define PXA2xx_SSP1_BASE 0x41000000
53 #define PXA27x_SSP2_BASE 0x41700000
54 #define PXA27x_SSP3_BASE 0x41900000
55 #define PXA3xx_SSP4_BASE 0x41a00000
56
57 static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_mono_out = {
58 .name = "SSP1 PCM Mono out",
59 .dev_addr = PXA2xx_SSP1_BASE + SSDR,
60 .drcmr = &DRCMR(14),
61 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
62 DCMD_BURST16 | DCMD_WIDTH2,
63 };
64
65 static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_mono_in = {
66 .name = "SSP1 PCM Mono in",
67 .dev_addr = PXA2xx_SSP1_BASE + SSDR,
68 .drcmr = &DRCMR(13),
69 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
70 DCMD_BURST16 | DCMD_WIDTH2,
71 };
72
73 static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_stereo_out = {
74 .name = "SSP1 PCM Stereo out",
75 .dev_addr = PXA2xx_SSP1_BASE + SSDR,
76 .drcmr = &DRCMR(14),
77 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
78 DCMD_BURST16 | DCMD_WIDTH4,
79 };
80
81 static struct pxa2xx_pcm_dma_params pxa_ssp1_pcm_stereo_in = {
82 .name = "SSP1 PCM Stereo in",
83 .dev_addr = PXA2xx_SSP1_BASE + SSDR,
84 .drcmr = &DRCMR(13),
85 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
86 DCMD_BURST16 | DCMD_WIDTH4,
87 };
88
89 static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_mono_out = {
90 .name = "SSP2 PCM Mono out",
91 .dev_addr = PXA27x_SSP2_BASE + SSDR,
92 .drcmr = &DRCMR(16),
93 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
94 DCMD_BURST16 | DCMD_WIDTH2,
95 };
96
97 static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_mono_in = {
98 .name = "SSP2 PCM Mono in",
99 .dev_addr = PXA27x_SSP2_BASE + SSDR,
100 .drcmr = &DRCMR(15),
101 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
102 DCMD_BURST16 | DCMD_WIDTH2,
103 };
104
105 static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_stereo_out = {
106 .name = "SSP2 PCM Stereo out",
107 .dev_addr = PXA27x_SSP2_BASE + SSDR,
108 .drcmr = &DRCMR(16),
109 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
110 DCMD_BURST16 | DCMD_WIDTH4,
111 };
112
113 static struct pxa2xx_pcm_dma_params pxa_ssp2_pcm_stereo_in = {
114 .name = "SSP2 PCM Stereo in",
115 .dev_addr = PXA27x_SSP2_BASE + SSDR,
116 .drcmr = &DRCMR(15),
117 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
118 DCMD_BURST16 | DCMD_WIDTH4,
119 };
120
121 static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_mono_out = {
122 .name = "SSP3 PCM Mono out",
123 .dev_addr = PXA27x_SSP3_BASE + SSDR,
124 .drcmr = &DRCMR(67),
125 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
126 DCMD_BURST16 | DCMD_WIDTH2,
127 };
128
129 static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_mono_in = {
130 .name = "SSP3 PCM Mono in",
131 .dev_addr = PXA27x_SSP3_BASE + SSDR,
132 .drcmr = &DRCMR(66),
133 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
134 DCMD_BURST16 | DCMD_WIDTH2,
135 };
136
137 static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_stereo_out = {
138 .name = "SSP3 PCM Stereo out",
139 .dev_addr = PXA27x_SSP3_BASE + SSDR,
140 .drcmr = &DRCMR(67),
141 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
142 DCMD_BURST16 | DCMD_WIDTH4,
143 };
144
145 static struct pxa2xx_pcm_dma_params pxa_ssp3_pcm_stereo_in = {
146 .name = "SSP3 PCM Stereo in",
147 .dev_addr = PXA27x_SSP3_BASE + SSDR,
148 .drcmr = &DRCMR(66),
149 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
150 DCMD_BURST16 | DCMD_WIDTH4,
151 };
152
153 static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_mono_out = {
154 .name = "SSP4 PCM Mono out",
155 .dev_addr = PXA3xx_SSP4_BASE + SSDR,
156 .drcmr = &DRCMR(67),
157 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
158 DCMD_BURST16 | DCMD_WIDTH2,
159 };
160
161 static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_mono_in = {
162 .name = "SSP4 PCM Mono in",
163 .dev_addr = PXA3xx_SSP4_BASE + SSDR,
164 .drcmr = &DRCMR(66),
165 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
166 DCMD_BURST16 | DCMD_WIDTH2,
167 };
168
169 static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_stereo_out = {
170 .name = "SSP4 PCM Stereo out",
171 .dev_addr = PXA3xx_SSP4_BASE + SSDR,
172 .drcmr = &DRCMR(67),
173 .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
174 DCMD_BURST16 | DCMD_WIDTH4,
175 };
176
177 static struct pxa2xx_pcm_dma_params pxa_ssp4_pcm_stereo_in = {
178 .name = "SSP4 PCM Stereo in",
179 .dev_addr = PXA3xx_SSP4_BASE + SSDR,
180 .drcmr = &DRCMR(66),
181 .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
182 DCMD_BURST16 | DCMD_WIDTH4,
183 };
184
dump_registers(struct ssp_device * ssp)185 static void dump_registers(struct ssp_device *ssp)
186 {
187 dev_dbg(&ssp->pdev->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
188 ssp_read_reg(ssp, SSCR0), ssp_read_reg(ssp, SSCR1),
189 ssp_read_reg(ssp, SSTO));
190
191 dev_dbg(&ssp->pdev->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
192 ssp_read_reg(ssp, SSPSP), ssp_read_reg(ssp, SSSR),
193 ssp_read_reg(ssp, SSACD));
194 }
195
196 static struct pxa2xx_pcm_dma_params *ssp_dma_params[4][4] = {
197 {
198 &pxa_ssp1_pcm_mono_out, &pxa_ssp1_pcm_mono_in,
199 &pxa_ssp1_pcm_stereo_out, &pxa_ssp1_pcm_stereo_in,
200 },
201 {
202 &pxa_ssp2_pcm_mono_out, &pxa_ssp2_pcm_mono_in,
203 &pxa_ssp2_pcm_stereo_out, &pxa_ssp2_pcm_stereo_in,
204 },
205 {
206 &pxa_ssp3_pcm_mono_out, &pxa_ssp3_pcm_mono_in,
207 &pxa_ssp3_pcm_stereo_out, &pxa_ssp3_pcm_stereo_in,
208 },
209 {
210 &pxa_ssp4_pcm_mono_out, &pxa_ssp4_pcm_mono_in,
211 &pxa_ssp4_pcm_stereo_out, &pxa_ssp4_pcm_stereo_in,
212 },
213 };
214
pxa_ssp_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)215 static int pxa_ssp_startup(struct snd_pcm_substream *substream,
216 struct snd_soc_dai *dai)
217 {
218 struct snd_soc_pcm_runtime *rtd = substream->private_data;
219 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
220 struct ssp_priv *priv = cpu_dai->private_data;
221 int ret = 0;
222
223 if (!cpu_dai->active) {
224 ret = ssp_init(&priv->dev, cpu_dai->id + 1, SSP_NO_IRQ);
225 if (ret < 0)
226 return ret;
227 ssp_disable(&priv->dev);
228 }
229 return ret;
230 }
231
pxa_ssp_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)232 static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
233 struct snd_soc_dai *dai)
234 {
235 struct snd_soc_pcm_runtime *rtd = substream->private_data;
236 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
237 struct ssp_priv *priv = cpu_dai->private_data;
238
239 if (!cpu_dai->active) {
240 ssp_disable(&priv->dev);
241 ssp_exit(&priv->dev);
242 }
243 }
244
245 #ifdef CONFIG_PM
246
pxa_ssp_suspend(struct snd_soc_dai * cpu_dai)247 static int pxa_ssp_suspend(struct snd_soc_dai *cpu_dai)
248 {
249 struct ssp_priv *priv = cpu_dai->private_data;
250
251 if (!cpu_dai->active)
252 return 0;
253
254 ssp_save_state(&priv->dev, &priv->state);
255 clk_disable(priv->dev.ssp->clk);
256 return 0;
257 }
258
pxa_ssp_resume(struct snd_soc_dai * cpu_dai)259 static int pxa_ssp_resume(struct snd_soc_dai *cpu_dai)
260 {
261 struct ssp_priv *priv = cpu_dai->private_data;
262
263 if (!cpu_dai->active)
264 return 0;
265
266 clk_enable(priv->dev.ssp->clk);
267 ssp_restore_state(&priv->dev, &priv->state);
268 ssp_enable(&priv->dev);
269
270 return 0;
271 }
272
273 #else
274 #define pxa_ssp_suspend NULL
275 #define pxa_ssp_resume NULL
276 #endif
277
278 /**
279 * ssp_set_clkdiv - set SSP clock divider
280 * @div: serial clock rate divider
281 */
ssp_set_scr(struct ssp_dev * dev,u32 div)282 static void ssp_set_scr(struct ssp_dev *dev, u32 div)
283 {
284 struct ssp_device *ssp = dev->ssp;
285 u32 sscr0 = ssp_read_reg(dev->ssp, SSCR0) & ~SSCR0_SCR;
286
287 ssp_write_reg(ssp, SSCR0, (sscr0 | SSCR0_SerClkDiv(div)));
288 }
289
290 /*
291 * Set the SSP ports SYSCLK.
292 */
pxa_ssp_set_dai_sysclk(struct snd_soc_dai * cpu_dai,int clk_id,unsigned int freq,int dir)293 static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
294 int clk_id, unsigned int freq, int dir)
295 {
296 struct ssp_priv *priv = cpu_dai->private_data;
297 struct ssp_device *ssp = priv->dev.ssp;
298 int val;
299
300 u32 sscr0 = ssp_read_reg(ssp, SSCR0) &
301 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
302
303 dev_dbg(&ssp->pdev->dev,
304 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %d\n",
305 cpu_dai->id, clk_id, freq);
306
307 switch (clk_id) {
308 case PXA_SSP_CLK_NET_PLL:
309 sscr0 |= SSCR0_MOD;
310 break;
311 case PXA_SSP_CLK_PLL:
312 /* Internal PLL is fixed */
313 if (cpu_is_pxa25x())
314 priv->sysclk = 1843200;
315 else
316 priv->sysclk = 13000000;
317 break;
318 case PXA_SSP_CLK_EXT:
319 priv->sysclk = freq;
320 sscr0 |= SSCR0_ECS;
321 break;
322 case PXA_SSP_CLK_NET:
323 priv->sysclk = freq;
324 sscr0 |= SSCR0_NCS | SSCR0_MOD;
325 break;
326 case PXA_SSP_CLK_AUDIO:
327 priv->sysclk = 0;
328 ssp_set_scr(&priv->dev, 1);
329 sscr0 |= SSCR0_ADC;
330 break;
331 default:
332 return -ENODEV;
333 }
334
335 /* The SSP clock must be disabled when changing SSP clock mode
336 * on PXA2xx. On PXA3xx it must be enabled when doing so. */
337 if (!cpu_is_pxa3xx())
338 clk_disable(priv->dev.ssp->clk);
339 val = ssp_read_reg(ssp, SSCR0) | sscr0;
340 ssp_write_reg(ssp, SSCR0, val);
341 if (!cpu_is_pxa3xx())
342 clk_enable(priv->dev.ssp->clk);
343
344 return 0;
345 }
346
347 /*
348 * Set the SSP clock dividers.
349 */
pxa_ssp_set_dai_clkdiv(struct snd_soc_dai * cpu_dai,int div_id,int div)350 static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
351 int div_id, int div)
352 {
353 struct ssp_priv *priv = cpu_dai->private_data;
354 struct ssp_device *ssp = priv->dev.ssp;
355 int val;
356
357 switch (div_id) {
358 case PXA_SSP_AUDIO_DIV_ACDS:
359 val = (ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
360 ssp_write_reg(ssp, SSACD, val);
361 break;
362 case PXA_SSP_AUDIO_DIV_SCDB:
363 val = ssp_read_reg(ssp, SSACD);
364 val &= ~SSACD_SCDB;
365 #if defined(CONFIG_PXA3xx)
366 if (cpu_is_pxa3xx())
367 val &= ~SSACD_SCDX8;
368 #endif
369 switch (div) {
370 case PXA_SSP_CLK_SCDB_1:
371 val |= SSACD_SCDB;
372 break;
373 case PXA_SSP_CLK_SCDB_4:
374 break;
375 #if defined(CONFIG_PXA3xx)
376 case PXA_SSP_CLK_SCDB_8:
377 if (cpu_is_pxa3xx())
378 val |= SSACD_SCDX8;
379 else
380 return -EINVAL;
381 break;
382 #endif
383 default:
384 return -EINVAL;
385 }
386 ssp_write_reg(ssp, SSACD, val);
387 break;
388 case PXA_SSP_DIV_SCR:
389 ssp_set_scr(&priv->dev, div);
390 break;
391 default:
392 return -ENODEV;
393 }
394
395 return 0;
396 }
397
398 /*
399 * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
400 */
pxa_ssp_set_dai_pll(struct snd_soc_dai * cpu_dai,int pll_id,unsigned int freq_in,unsigned int freq_out)401 static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai,
402 int pll_id, unsigned int freq_in, unsigned int freq_out)
403 {
404 struct ssp_priv *priv = cpu_dai->private_data;
405 struct ssp_device *ssp = priv->dev.ssp;
406 u32 ssacd = ssp_read_reg(ssp, SSACD) & ~0x70;
407
408 #if defined(CONFIG_PXA3xx)
409 if (cpu_is_pxa3xx())
410 ssp_write_reg(ssp, SSACDD, 0);
411 #endif
412
413 switch (freq_out) {
414 case 5622000:
415 break;
416 case 11345000:
417 ssacd |= (0x1 << 4);
418 break;
419 case 12235000:
420 ssacd |= (0x2 << 4);
421 break;
422 case 14857000:
423 ssacd |= (0x3 << 4);
424 break;
425 case 32842000:
426 ssacd |= (0x4 << 4);
427 break;
428 case 48000000:
429 ssacd |= (0x5 << 4);
430 break;
431 case 0:
432 /* Disable */
433 break;
434
435 default:
436 #ifdef CONFIG_PXA3xx
437 /* PXA3xx has a clock ditherer which can be used to generate
438 * a wider range of frequencies - calculate a value for it.
439 */
440 if (cpu_is_pxa3xx()) {
441 u32 val;
442 u64 tmp = 19968;
443 tmp *= 1000000;
444 do_div(tmp, freq_out);
445 val = tmp;
446
447 val = (val << 16) | 64;;
448 ssp_write_reg(ssp, SSACDD, val);
449
450 ssacd |= (0x6 << 4);
451
452 dev_dbg(&ssp->pdev->dev,
453 "Using SSACDD %x to supply %dHz\n",
454 val, freq_out);
455 break;
456 }
457 #endif
458
459 return -EINVAL;
460 }
461
462 ssp_write_reg(ssp, SSACD, ssacd);
463
464 return 0;
465 }
466
467 /*
468 * Set the active slots in TDM/Network mode
469 */
pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai * cpu_dai,unsigned int mask,int slots)470 static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
471 unsigned int mask, int slots)
472 {
473 struct ssp_priv *priv = cpu_dai->private_data;
474 struct ssp_device *ssp = priv->dev.ssp;
475 u32 sscr0;
476
477 sscr0 = ssp_read_reg(ssp, SSCR0) & ~SSCR0_SlotsPerFrm(7);
478
479 /* set number of active slots */
480 sscr0 |= SSCR0_SlotsPerFrm(slots);
481 ssp_write_reg(ssp, SSCR0, sscr0);
482
483 /* set active slot mask */
484 ssp_write_reg(ssp, SSTSA, mask);
485 ssp_write_reg(ssp, SSRSA, mask);
486 return 0;
487 }
488
489 /*
490 * Tristate the SSP DAI lines
491 */
pxa_ssp_set_dai_tristate(struct snd_soc_dai * cpu_dai,int tristate)492 static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
493 int tristate)
494 {
495 struct ssp_priv *priv = cpu_dai->private_data;
496 struct ssp_device *ssp = priv->dev.ssp;
497 u32 sscr1;
498
499 sscr1 = ssp_read_reg(ssp, SSCR1);
500 if (tristate)
501 sscr1 &= ~SSCR1_TTE;
502 else
503 sscr1 |= SSCR1_TTE;
504 ssp_write_reg(ssp, SSCR1, sscr1);
505
506 return 0;
507 }
508
509 /*
510 * Set up the SSP DAI format.
511 * The SSP Port must be inactive before calling this function as the
512 * physical interface format is changed.
513 */
pxa_ssp_set_dai_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)514 static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
515 unsigned int fmt)
516 {
517 struct ssp_priv *priv = cpu_dai->private_data;
518 struct ssp_device *ssp = priv->dev.ssp;
519 u32 sscr0;
520 u32 sscr1;
521 u32 sspsp;
522
523 /* reset port settings */
524 sscr0 = ssp_read_reg(ssp, SSCR0) &
525 (SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ADC);
526 sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
527 sspsp = 0;
528
529 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
530 case SND_SOC_DAIFMT_CBM_CFM:
531 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR;
532 break;
533 case SND_SOC_DAIFMT_CBM_CFS:
534 sscr1 |= SSCR1_SCLKDIR;
535 break;
536 case SND_SOC_DAIFMT_CBS_CFS:
537 break;
538 default:
539 return -EINVAL;
540 }
541
542 ssp_write_reg(ssp, SSCR0, sscr0);
543 ssp_write_reg(ssp, SSCR1, sscr1);
544 ssp_write_reg(ssp, SSPSP, sspsp);
545
546 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
547 case SND_SOC_DAIFMT_I2S:
548 sscr0 |= SSCR0_MOD | SSCR0_PSP;
549 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
550
551 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
552 case SND_SOC_DAIFMT_NB_NF:
553 sspsp |= SSPSP_FSRT;
554 break;
555 case SND_SOC_DAIFMT_NB_IF:
556 sspsp |= SSPSP_SFRMP | SSPSP_FSRT;
557 break;
558 case SND_SOC_DAIFMT_IB_IF:
559 sspsp |= SSPSP_SFRMP;
560 break;
561 default:
562 return -EINVAL;
563 }
564 break;
565
566 case SND_SOC_DAIFMT_DSP_A:
567 sspsp |= SSPSP_FSRT;
568 case SND_SOC_DAIFMT_DSP_B:
569 sscr0 |= SSCR0_MOD | SSCR0_PSP;
570 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
571
572 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
573 case SND_SOC_DAIFMT_NB_NF:
574 sspsp |= SSPSP_SFRMP;
575 break;
576 case SND_SOC_DAIFMT_IB_IF:
577 break;
578 default:
579 return -EINVAL;
580 }
581 break;
582
583 default:
584 return -EINVAL;
585 }
586
587 ssp_write_reg(ssp, SSCR0, sscr0);
588 ssp_write_reg(ssp, SSCR1, sscr1);
589 ssp_write_reg(ssp, SSPSP, sspsp);
590
591 dump_registers(ssp);
592
593 /* Since we are configuring the timings for the format by hand
594 * we have to defer some things until hw_params() where we
595 * know parameters like the sample size.
596 */
597 priv->dai_fmt = fmt;
598
599 return 0;
600 }
601
602 /*
603 * Set the SSP audio DMA parameters and sample size.
604 * Can be called multiple times by oss emulation.
605 */
pxa_ssp_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)606 static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
607 struct snd_pcm_hw_params *params,
608 struct snd_soc_dai *dai)
609 {
610 struct snd_soc_pcm_runtime *rtd = substream->private_data;
611 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
612 struct ssp_priv *priv = cpu_dai->private_data;
613 struct ssp_device *ssp = priv->dev.ssp;
614 int dma = 0, chn = params_channels(params);
615 u32 sscr0;
616 u32 sspsp;
617 int width = snd_pcm_format_physical_width(params_format(params));
618
619 /* select correct DMA params */
620 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
621 dma = 1; /* capture DMA offset is 1,3 */
622 if (chn == 2)
623 dma += 2; /* stereo DMA offset is 2, mono is 0 */
624 cpu_dai->dma_data = ssp_dma_params[cpu_dai->id][dma];
625
626 dev_dbg(&ssp->pdev->dev, "pxa_ssp_hw_params: dma %d\n", dma);
627
628 /* we can only change the settings if the port is not in use */
629 if (ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
630 return 0;
631
632 /* clear selected SSP bits */
633 sscr0 = ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
634 ssp_write_reg(ssp, SSCR0, sscr0);
635
636 /* bit size */
637 sscr0 = ssp_read_reg(ssp, SSCR0);
638 switch (params_format(params)) {
639 case SNDRV_PCM_FORMAT_S16_LE:
640 #ifdef CONFIG_PXA3xx
641 if (cpu_is_pxa3xx())
642 sscr0 |= SSCR0_FPCKE;
643 #endif
644 sscr0 |= SSCR0_DataSize(16);
645 if (params_channels(params) > 1)
646 sscr0 |= SSCR0_EDSS;
647 break;
648 case SNDRV_PCM_FORMAT_S24_LE:
649 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
650 /* we must be in network mode (2 slots) for 24 bit stereo */
651 break;
652 case SNDRV_PCM_FORMAT_S32_LE:
653 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
654 /* we must be in network mode (2 slots) for 32 bit stereo */
655 break;
656 }
657 ssp_write_reg(ssp, SSCR0, sscr0);
658
659 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
660 case SND_SOC_DAIFMT_I2S:
661 /* Cleared when the DAI format is set */
662 sspsp = ssp_read_reg(ssp, SSPSP) | SSPSP_SFRMWDTH(width);
663 ssp_write_reg(ssp, SSPSP, sspsp);
664 break;
665 default:
666 break;
667 }
668
669 /* We always use a network mode so we always require TDM slots
670 * - complain loudly and fail if they've not been set up yet.
671 */
672 if (!(ssp_read_reg(ssp, SSTSA) & 0xf)) {
673 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
674 return -EINVAL;
675 }
676
677 dump_registers(ssp);
678
679 return 0;
680 }
681
pxa_ssp_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)682 static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
683 struct snd_soc_dai *dai)
684 {
685 struct snd_soc_pcm_runtime *rtd = substream->private_data;
686 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
687 int ret = 0;
688 struct ssp_priv *priv = cpu_dai->private_data;
689 struct ssp_device *ssp = priv->dev.ssp;
690 int val;
691
692 switch (cmd) {
693 case SNDRV_PCM_TRIGGER_RESUME:
694 ssp_enable(&priv->dev);
695 break;
696 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
697 val = ssp_read_reg(ssp, SSCR1);
698 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
699 val |= SSCR1_TSRE;
700 else
701 val |= SSCR1_RSRE;
702 ssp_write_reg(ssp, SSCR1, val);
703 val = ssp_read_reg(ssp, SSSR);
704 ssp_write_reg(ssp, SSSR, val);
705 break;
706 case SNDRV_PCM_TRIGGER_START:
707 val = ssp_read_reg(ssp, SSCR1);
708 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
709 val |= SSCR1_TSRE;
710 else
711 val |= SSCR1_RSRE;
712 ssp_write_reg(ssp, SSCR1, val);
713 ssp_enable(&priv->dev);
714 break;
715 case SNDRV_PCM_TRIGGER_STOP:
716 val = ssp_read_reg(ssp, SSCR1);
717 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
718 val &= ~SSCR1_TSRE;
719 else
720 val &= ~SSCR1_RSRE;
721 ssp_write_reg(ssp, SSCR1, val);
722 break;
723 case SNDRV_PCM_TRIGGER_SUSPEND:
724 ssp_disable(&priv->dev);
725 break;
726 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
727 val = ssp_read_reg(ssp, SSCR1);
728 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
729 val &= ~SSCR1_TSRE;
730 else
731 val &= ~SSCR1_RSRE;
732 ssp_write_reg(ssp, SSCR1, val);
733 break;
734
735 default:
736 ret = -EINVAL;
737 }
738
739 dump_registers(ssp);
740
741 return ret;
742 }
743
pxa_ssp_probe(struct platform_device * pdev,struct snd_soc_dai * dai)744 static int pxa_ssp_probe(struct platform_device *pdev,
745 struct snd_soc_dai *dai)
746 {
747 struct ssp_priv *priv;
748 int ret;
749
750 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
751 if (!priv)
752 return -ENOMEM;
753
754 priv->dev.ssp = ssp_request(dai->id, "SoC audio");
755 if (priv->dev.ssp == NULL) {
756 ret = -ENODEV;
757 goto err_priv;
758 }
759
760 dai->private_data = priv;
761
762 return 0;
763
764 err_priv:
765 kfree(priv);
766 return ret;
767 }
768
pxa_ssp_remove(struct platform_device * pdev,struct snd_soc_dai * dai)769 static void pxa_ssp_remove(struct platform_device *pdev,
770 struct snd_soc_dai *dai)
771 {
772 struct ssp_priv *priv = dai->private_data;
773 ssp_free(priv->dev.ssp);
774 }
775
776 #define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
777 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
778 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
779 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
780
781 #define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
782 SNDRV_PCM_FMTBIT_S24_LE | \
783 SNDRV_PCM_FMTBIT_S32_LE)
784
785 struct snd_soc_dai pxa_ssp_dai[] = {
786 {
787 .name = "pxa2xx-ssp1",
788 .id = 0,
789 .probe = pxa_ssp_probe,
790 .remove = pxa_ssp_remove,
791 .suspend = pxa_ssp_suspend,
792 .resume = pxa_ssp_resume,
793 .playback = {
794 .channels_min = 1,
795 .channels_max = 2,
796 .rates = PXA_SSP_RATES,
797 .formats = PXA_SSP_FORMATS,
798 },
799 .capture = {
800 .channels_min = 1,
801 .channels_max = 2,
802 .rates = PXA_SSP_RATES,
803 .formats = PXA_SSP_FORMATS,
804 },
805 .ops = {
806 .startup = pxa_ssp_startup,
807 .shutdown = pxa_ssp_shutdown,
808 .trigger = pxa_ssp_trigger,
809 .hw_params = pxa_ssp_hw_params,
810 .set_sysclk = pxa_ssp_set_dai_sysclk,
811 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
812 .set_pll = pxa_ssp_set_dai_pll,
813 .set_fmt = pxa_ssp_set_dai_fmt,
814 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
815 .set_tristate = pxa_ssp_set_dai_tristate,
816 },
817 },
818 { .name = "pxa2xx-ssp2",
819 .id = 1,
820 .probe = pxa_ssp_probe,
821 .remove = pxa_ssp_remove,
822 .suspend = pxa_ssp_suspend,
823 .resume = pxa_ssp_resume,
824 .playback = {
825 .channels_min = 1,
826 .channels_max = 2,
827 .rates = PXA_SSP_RATES,
828 .formats = PXA_SSP_FORMATS,
829 },
830 .capture = {
831 .channels_min = 1,
832 .channels_max = 2,
833 .rates = PXA_SSP_RATES,
834 .formats = PXA_SSP_FORMATS,
835 },
836 .ops = {
837 .startup = pxa_ssp_startup,
838 .shutdown = pxa_ssp_shutdown,
839 .trigger = pxa_ssp_trigger,
840 .hw_params = pxa_ssp_hw_params,
841 .set_sysclk = pxa_ssp_set_dai_sysclk,
842 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
843 .set_pll = pxa_ssp_set_dai_pll,
844 .set_fmt = pxa_ssp_set_dai_fmt,
845 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
846 .set_tristate = pxa_ssp_set_dai_tristate,
847 },
848 },
849 {
850 .name = "pxa2xx-ssp3",
851 .id = 2,
852 .probe = pxa_ssp_probe,
853 .remove = pxa_ssp_remove,
854 .suspend = pxa_ssp_suspend,
855 .resume = pxa_ssp_resume,
856 .playback = {
857 .channels_min = 1,
858 .channels_max = 2,
859 .rates = PXA_SSP_RATES,
860 .formats = PXA_SSP_FORMATS,
861 },
862 .capture = {
863 .channels_min = 1,
864 .channels_max = 2,
865 .rates = PXA_SSP_RATES,
866 .formats = PXA_SSP_FORMATS,
867 },
868 .ops = {
869 .startup = pxa_ssp_startup,
870 .shutdown = pxa_ssp_shutdown,
871 .trigger = pxa_ssp_trigger,
872 .hw_params = pxa_ssp_hw_params,
873 .set_sysclk = pxa_ssp_set_dai_sysclk,
874 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
875 .set_pll = pxa_ssp_set_dai_pll,
876 .set_fmt = pxa_ssp_set_dai_fmt,
877 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
878 .set_tristate = pxa_ssp_set_dai_tristate,
879 },
880 },
881 {
882 .name = "pxa2xx-ssp4",
883 .id = 3,
884 .probe = pxa_ssp_probe,
885 .remove = pxa_ssp_remove,
886 .suspend = pxa_ssp_suspend,
887 .resume = pxa_ssp_resume,
888 .playback = {
889 .channels_min = 1,
890 .channels_max = 2,
891 .rates = PXA_SSP_RATES,
892 .formats = PXA_SSP_FORMATS,
893 },
894 .capture = {
895 .channels_min = 1,
896 .channels_max = 2,
897 .rates = PXA_SSP_RATES,
898 .formats = PXA_SSP_FORMATS,
899 },
900 .ops = {
901 .startup = pxa_ssp_startup,
902 .shutdown = pxa_ssp_shutdown,
903 .trigger = pxa_ssp_trigger,
904 .hw_params = pxa_ssp_hw_params,
905 .set_sysclk = pxa_ssp_set_dai_sysclk,
906 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
907 .set_pll = pxa_ssp_set_dai_pll,
908 .set_fmt = pxa_ssp_set_dai_fmt,
909 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
910 .set_tristate = pxa_ssp_set_dai_tristate,
911 },
912 },
913 };
914 EXPORT_SYMBOL_GPL(pxa_ssp_dai);
915
pxa_ssp_init(void)916 static int __init pxa_ssp_init(void)
917 {
918 return snd_soc_register_dais(pxa_ssp_dai, ARRAY_SIZE(pxa_ssp_dai));
919 }
920 module_init(pxa_ssp_init);
921
pxa_ssp_exit(void)922 static void __exit pxa_ssp_exit(void)
923 {
924 snd_soc_unregister_dais(pxa_ssp_dai, ARRAY_SIZE(pxa_ssp_dai));
925 }
926 module_exit(pxa_ssp_exit);
927
928 /* Module information */
929 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
930 MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
931 MODULE_LICENSE("GPL");
932