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1// SPDX-License-Identifier: GPL-2.0-or-later
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 * TODO:
10 * o Test network mode for > 16bit sample size
11 */
12
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/slab.h>
16#include <linux/platform_device.h>
17#include <linux/clk.h>
18#include <linux/io.h>
19#include <linux/pxa2xx_ssp.h>
20#include <linux/of.h>
21#include <linux/dmaengine.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#include <sound/dmaengine_pcm.h>
32
33#include "pxa-ssp.h"
34
35/*
36 * SSP audio private data
37 */
38struct ssp_priv {
39 struct ssp_device *ssp;
40 struct clk *extclk;
41 unsigned long ssp_clk;
42 unsigned int sysclk;
43 unsigned int dai_fmt;
44 unsigned int configured_dai_fmt;
45#ifdef CONFIG_PM
46 uint32_t cr0;
47 uint32_t cr1;
48 uint32_t to;
49 uint32_t psp;
50#endif
51};
52
53static void dump_registers(struct ssp_device *ssp)
54{
55 dev_dbg(ssp->dev, "SSCR0 0x%08x SSCR1 0x%08x SSTO 0x%08x\n",
56 pxa_ssp_read_reg(ssp, SSCR0), pxa_ssp_read_reg(ssp, SSCR1),
57 pxa_ssp_read_reg(ssp, SSTO));
58
59 dev_dbg(ssp->dev, "SSPSP 0x%08x SSSR 0x%08x SSACD 0x%08x\n",
60 pxa_ssp_read_reg(ssp, SSPSP), pxa_ssp_read_reg(ssp, SSSR),
61 pxa_ssp_read_reg(ssp, SSACD));
62}
63
64static void pxa_ssp_set_dma_params(struct ssp_device *ssp, int width4,
65 int out, struct snd_dmaengine_dai_dma_data *dma)
66{
67 dma->addr_width = width4 ? DMA_SLAVE_BUSWIDTH_4_BYTES :
68 DMA_SLAVE_BUSWIDTH_2_BYTES;
69 dma->maxburst = 16;
70 dma->addr = ssp->phys_base + SSDR;
71}
72
73static int pxa_ssp_startup(struct snd_pcm_substream *substream,
74 struct snd_soc_dai *cpu_dai)
75{
76 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
77 struct ssp_device *ssp = priv->ssp;
78 struct snd_dmaengine_dai_dma_data *dma;
79 int ret = 0;
80
81 if (!snd_soc_dai_active(cpu_dai)) {
82 clk_prepare_enable(ssp->clk);
83 pxa_ssp_disable(ssp);
84 }
85
86 clk_prepare_enable(priv->extclk);
87
88 dma = kzalloc(sizeof(struct snd_dmaengine_dai_dma_data), GFP_KERNEL);
89 if (!dma)
90 return -ENOMEM;
91 dma->chan_name = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
92 "tx" : "rx";
93
94 snd_soc_dai_set_dma_data(cpu_dai, substream, dma);
95
96 return ret;
97}
98
99static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
100 struct snd_soc_dai *cpu_dai)
101{
102 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
103 struct ssp_device *ssp = priv->ssp;
104
105 if (!snd_soc_dai_active(cpu_dai)) {
106 pxa_ssp_disable(ssp);
107 clk_disable_unprepare(ssp->clk);
108 }
109
110 clk_disable_unprepare(priv->extclk);
111
112 kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
113 snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
114}
115
116#ifdef CONFIG_PM
117
118static int pxa_ssp_suspend(struct snd_soc_component *component)
119{
120 struct ssp_priv *priv = snd_soc_component_get_drvdata(component);
121 struct ssp_device *ssp = priv->ssp;
122
123 if (!snd_soc_component_active(component))
124 clk_prepare_enable(ssp->clk);
125
126 priv->cr0 = __raw_readl(ssp->mmio_base + SSCR0);
127 priv->cr1 = __raw_readl(ssp->mmio_base + SSCR1);
128 priv->to = __raw_readl(ssp->mmio_base + SSTO);
129 priv->psp = __raw_readl(ssp->mmio_base + SSPSP);
130
131 pxa_ssp_disable(ssp);
132 clk_disable_unprepare(ssp->clk);
133 return 0;
134}
135
136static int pxa_ssp_resume(struct snd_soc_component *component)
137{
138 struct ssp_priv *priv = snd_soc_component_get_drvdata(component);
139 struct ssp_device *ssp = priv->ssp;
140 uint32_t sssr = SSSR_ROR | SSSR_TUR | SSSR_BCE;
141
142 clk_prepare_enable(ssp->clk);
143
144 __raw_writel(sssr, ssp->mmio_base + SSSR);
145 __raw_writel(priv->cr0 & ~SSCR0_SSE, ssp->mmio_base + SSCR0);
146 __raw_writel(priv->cr1, ssp->mmio_base + SSCR1);
147 __raw_writel(priv->to, ssp->mmio_base + SSTO);
148 __raw_writel(priv->psp, ssp->mmio_base + SSPSP);
149
150 if (snd_soc_component_active(component))
151 pxa_ssp_enable(ssp);
152 else
153 clk_disable_unprepare(ssp->clk);
154
155 return 0;
156}
157
158#else
159#define pxa_ssp_suspend NULL
160#define pxa_ssp_resume NULL
161#endif
162
163/*
164 * ssp_set_clkdiv - set SSP clock divider
165 * @div: serial clock rate divider
166 */
167static void pxa_ssp_set_scr(struct ssp_device *ssp, u32 div)
168{
169 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
170
171 if (ssp->type == PXA25x_SSP) {
172 sscr0 &= ~0x0000ff00;
173 sscr0 |= ((div - 2)/2) << 8; /* 2..512 */
174 } else {
175 sscr0 &= ~0x000fff00;
176 sscr0 |= (div - 1) << 8; /* 1..4096 */
177 }
178 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
179}
180
181/*
182 * Set the SSP ports SYSCLK.
183 */
184static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
185 int clk_id, unsigned int freq, int dir)
186{
187 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
188 struct ssp_device *ssp = priv->ssp;
189
190 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
191 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
192
193 if (priv->extclk) {
194 int ret;
195
196 /*
197 * For DT based boards, if an extclk is given, use it
198 * here and configure PXA_SSP_CLK_EXT.
199 */
200
201 ret = clk_set_rate(priv->extclk, freq);
202 if (ret < 0)
203 return ret;
204
205 clk_id = PXA_SSP_CLK_EXT;
206 }
207
208 dev_dbg(ssp->dev,
209 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %u\n",
210 cpu_dai->id, clk_id, freq);
211
212 switch (clk_id) {
213 case PXA_SSP_CLK_NET_PLL:
214 sscr0 |= SSCR0_MOD;
215 break;
216 case PXA_SSP_CLK_PLL:
217 /* Internal PLL is fixed */
218 if (ssp->type == PXA25x_SSP)
219 priv->sysclk = 1843200;
220 else
221 priv->sysclk = 13000000;
222 break;
223 case PXA_SSP_CLK_EXT:
224 priv->sysclk = freq;
225 sscr0 |= SSCR0_ECS;
226 break;
227 case PXA_SSP_CLK_NET:
228 priv->sysclk = freq;
229 sscr0 |= SSCR0_NCS | SSCR0_MOD;
230 break;
231 case PXA_SSP_CLK_AUDIO:
232 priv->sysclk = 0;
233 pxa_ssp_set_scr(ssp, 1);
234 sscr0 |= SSCR0_ACS;
235 break;
236 default:
237 return -ENODEV;
238 }
239
240 /* The SSP clock must be disabled when changing SSP clock mode
241 * on PXA2xx. On PXA3xx it must be enabled when doing so. */
242 if (ssp->type != PXA3xx_SSP)
243 clk_disable_unprepare(ssp->clk);
244 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
245 if (ssp->type != PXA3xx_SSP)
246 clk_prepare_enable(ssp->clk);
247
248 return 0;
249}
250
251/*
252 * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
253 */
254static int pxa_ssp_set_pll(struct ssp_priv *priv, unsigned int freq)
255{
256 struct ssp_device *ssp = priv->ssp;
257 u32 ssacd = pxa_ssp_read_reg(ssp, SSACD) & ~0x70;
258
259 if (ssp->type == PXA3xx_SSP)
260 pxa_ssp_write_reg(ssp, SSACDD, 0);
261
262 switch (freq) {
263 case 5622000:
264 break;
265 case 11345000:
266 ssacd |= (0x1 << 4);
267 break;
268 case 12235000:
269 ssacd |= (0x2 << 4);
270 break;
271 case 14857000:
272 ssacd |= (0x3 << 4);
273 break;
274 case 32842000:
275 ssacd |= (0x4 << 4);
276 break;
277 case 48000000:
278 ssacd |= (0x5 << 4);
279 break;
280 case 0:
281 /* Disable */
282 break;
283
284 default:
285 /* PXA3xx has a clock ditherer which can be used to generate
286 * a wider range of frequencies - calculate a value for it.
287 */
288 if (ssp->type == PXA3xx_SSP) {
289 u32 val;
290 u64 tmp = 19968;
291
292 tmp *= 1000000;
293 do_div(tmp, freq);
294 val = tmp;
295
296 val = (val << 16) | 64;
297 pxa_ssp_write_reg(ssp, SSACDD, val);
298
299 ssacd |= (0x6 << 4);
300
301 dev_dbg(ssp->dev,
302 "Using SSACDD %x to supply %uHz\n",
303 val, freq);
304 break;
305 }
306
307 return -EINVAL;
308 }
309
310 pxa_ssp_write_reg(ssp, SSACD, ssacd);
311
312 return 0;
313}
314
315/*
316 * Set the active slots in TDM/Network mode
317 */
318static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
319 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
320{
321 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
322 struct ssp_device *ssp = priv->ssp;
323 u32 sscr0;
324
325 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
326 sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS);
327
328 /* set slot width */
329 if (slot_width > 16)
330 sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16);
331 else
332 sscr0 |= SSCR0_DataSize(slot_width);
333
334 if (slots > 1) {
335 /* enable network mode */
336 sscr0 |= SSCR0_MOD;
337
338 /* set number of active slots */
339 sscr0 |= SSCR0_SlotsPerFrm(slots);
340
341 /* set active slot mask */
342 pxa_ssp_write_reg(ssp, SSTSA, tx_mask);
343 pxa_ssp_write_reg(ssp, SSRSA, rx_mask);
344 }
345 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
346
347 return 0;
348}
349
350/*
351 * Tristate the SSP DAI lines
352 */
353static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
354 int tristate)
355{
356 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
357 struct ssp_device *ssp = priv->ssp;
358 u32 sscr1;
359
360 sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
361 if (tristate)
362 sscr1 &= ~SSCR1_TTE;
363 else
364 sscr1 |= SSCR1_TTE;
365 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
366
367 return 0;
368}
369
370static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
371 unsigned int fmt)
372{
373 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
374
375 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
376 case SND_SOC_DAIFMT_BC_FC:
377 case SND_SOC_DAIFMT_BC_FP:
378 case SND_SOC_DAIFMT_BP_FP:
379 break;
380 default:
381 return -EINVAL;
382 }
383
384 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
385 case SND_SOC_DAIFMT_NB_NF:
386 case SND_SOC_DAIFMT_NB_IF:
387 case SND_SOC_DAIFMT_IB_IF:
388 case SND_SOC_DAIFMT_IB_NF:
389 break;
390 default:
391 return -EINVAL;
392 }
393
394 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
395 case SND_SOC_DAIFMT_I2S:
396 case SND_SOC_DAIFMT_DSP_A:
397 case SND_SOC_DAIFMT_DSP_B:
398 break;
399
400 default:
401 return -EINVAL;
402 }
403
404 /* Settings will be applied in hw_params() */
405 priv->dai_fmt = fmt;
406
407 return 0;
408}
409
410/*
411 * Set up the SSP DAI format.
412 * The SSP Port must be inactive before calling this function as the
413 * physical interface format is changed.
414 */
415static int pxa_ssp_configure_dai_fmt(struct ssp_priv *priv)
416{
417 struct ssp_device *ssp = priv->ssp;
418 u32 sscr0, sscr1, sspsp, scfr;
419
420 /* check if we need to change anything at all */
421 if (priv->configured_dai_fmt == priv->dai_fmt)
422 return 0;
423
424 /* reset port settings */
425 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
426 ~(SSCR0_PSP | SSCR0_MOD);
427 sscr1 = pxa_ssp_read_reg(ssp, SSCR1) &
428 ~(SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR |
429 SSCR1_RWOT | SSCR1_TRAIL | SSCR1_TFT | SSCR1_RFT);
430 sspsp = pxa_ssp_read_reg(ssp, SSPSP) &
431 ~(SSPSP_SFRMP | SSPSP_SCMODE(3));
432
433 sscr1 |= SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
434
435 switch (priv->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
436 case SND_SOC_DAIFMT_BC_FC:
437 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR;
438 break;
439 case SND_SOC_DAIFMT_BC_FP:
440 sscr1 |= SSCR1_SCLKDIR | SSCR1_SCFR;
441 break;
442 case SND_SOC_DAIFMT_BP_FP:
443 break;
444 default:
445 return -EINVAL;
446 }
447
448 switch (priv->dai_fmt & SND_SOC_DAIFMT_INV_MASK) {
449 case SND_SOC_DAIFMT_NB_NF:
450 sspsp |= SSPSP_SFRMP;
451 break;
452 case SND_SOC_DAIFMT_NB_IF:
453 break;
454 case SND_SOC_DAIFMT_IB_IF:
455 sspsp |= SSPSP_SCMODE(2);
456 break;
457 case SND_SOC_DAIFMT_IB_NF:
458 sspsp |= SSPSP_SCMODE(2) | SSPSP_SFRMP;
459 break;
460 default:
461 return -EINVAL;
462 }
463
464 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
465 case SND_SOC_DAIFMT_I2S:
466 sscr0 |= SSCR0_PSP;
467 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
468 /* See hw_params() */
469 break;
470
471 case SND_SOC_DAIFMT_DSP_A:
472 sspsp |= SSPSP_FSRT;
473 fallthrough;
474 case SND_SOC_DAIFMT_DSP_B:
475 sscr0 |= SSCR0_MOD | SSCR0_PSP;
476 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
477 break;
478
479 default:
480 return -EINVAL;
481 }
482
483 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
484 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
485 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
486
487 switch (priv->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
488 case SND_SOC_DAIFMT_BC_FC:
489 case SND_SOC_DAIFMT_BC_FP:
490 scfr = pxa_ssp_read_reg(ssp, SSCR1) | SSCR1_SCFR;
491 pxa_ssp_write_reg(ssp, SSCR1, scfr);
492
493 while (pxa_ssp_read_reg(ssp, SSSR) & SSSR_BSY)
494 cpu_relax();
495 break;
496 }
497
498 dump_registers(ssp);
499
500 /* Since we are configuring the timings for the format by hand
501 * we have to defer some things until hw_params() where we
502 * know parameters like the sample size.
503 */
504 priv->configured_dai_fmt = priv->dai_fmt;
505
506 return 0;
507}
508
509struct pxa_ssp_clock_mode {
510 int rate;
511 int pll;
512 u8 acds;
513 u8 scdb;
514};
515
516static const struct pxa_ssp_clock_mode pxa_ssp_clock_modes[] = {
517 { .rate = 8000, .pll = 32842000, .acds = SSACD_ACDS_32, .scdb = SSACD_SCDB_4X },
518 { .rate = 11025, .pll = 5622000, .acds = SSACD_ACDS_4, .scdb = SSACD_SCDB_4X },
519 { .rate = 16000, .pll = 32842000, .acds = SSACD_ACDS_16, .scdb = SSACD_SCDB_4X },
520 { .rate = 22050, .pll = 5622000, .acds = SSACD_ACDS_2, .scdb = SSACD_SCDB_4X },
521 { .rate = 44100, .pll = 11345000, .acds = SSACD_ACDS_2, .scdb = SSACD_SCDB_4X },
522 { .rate = 48000, .pll = 12235000, .acds = SSACD_ACDS_2, .scdb = SSACD_SCDB_4X },
523 { .rate = 96000, .pll = 12235000, .acds = SSACD_ACDS_4, .scdb = SSACD_SCDB_1X },
524 {}
525};
526
527/*
528 * Set the SSP audio DMA parameters and sample size.
529 * Can be called multiple times by oss emulation.
530 */
531static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
532 struct snd_pcm_hw_params *params,
533 struct snd_soc_dai *cpu_dai)
534{
535 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
536 struct ssp_device *ssp = priv->ssp;
537 int chn = params_channels(params);
538 u32 sscr0, sspsp;
539 int width = snd_pcm_format_physical_width(params_format(params));
540 int ttsa = pxa_ssp_read_reg(ssp, SSTSA) & 0xf;
541 struct snd_dmaengine_dai_dma_data *dma_data;
542 int rate = params_rate(params);
543 int bclk = rate * chn * (width / 8);
544 int ret;
545
546 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
547
548 /* Network mode with one active slot (ttsa == 1) can be used
549 * to force 16-bit frame width on the wire (for S16_LE), even
550 * with two channels. Use 16-bit DMA transfers for this case.
551 */
552 pxa_ssp_set_dma_params(ssp,
553 ((chn == 2) && (ttsa != 1)) || (width == 32),
554 substream->stream == SNDRV_PCM_STREAM_PLAYBACK, dma_data);
555
556 /* we can only change the settings if the port is not in use */
557 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
558 return 0;
559
560 ret = pxa_ssp_configure_dai_fmt(priv);
561 if (ret < 0)
562 return ret;
563
564 /* clear selected SSP bits */
565 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
566
567 /* bit size */
568 switch (params_format(params)) {
569 case SNDRV_PCM_FORMAT_S16_LE:
570 if (ssp->type == PXA3xx_SSP)
571 sscr0 |= SSCR0_FPCKE;
572 sscr0 |= SSCR0_DataSize(16);
573 break;
574 case SNDRV_PCM_FORMAT_S24_LE:
575 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
576 break;
577 case SNDRV_PCM_FORMAT_S32_LE:
578 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
579 break;
580 }
581 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
582
583 if (sscr0 & SSCR0_ACS) {
584 ret = pxa_ssp_set_pll(priv, bclk);
585
586 /*
587 * If we were able to generate the bclk directly,
588 * all is fine. Otherwise, look up the closest rate
589 * from the table and also set the dividers.
590 */
591
592 if (ret < 0) {
593 const struct pxa_ssp_clock_mode *m;
594 int ssacd;
595
596 for (m = pxa_ssp_clock_modes; m->rate; m++) {
597 if (m->rate == rate)
598 break;
599 }
600
601 if (!m->rate)
602 return -EINVAL;
603
604 ret = pxa_ssp_set_pll(priv, bclk);
605 if (ret < 0)
606 return ret;
607
608 ssacd = pxa_ssp_read_reg(ssp, SSACD);
609 ssacd &= ~(SSACD_ACDS(7) | SSACD_SCDB_1X);
610 ssacd |= SSACD_ACDS(m->acds);
611 ssacd |= m->scdb;
612 pxa_ssp_write_reg(ssp, SSACD, ssacd);
613 }
614 } else if (sscr0 & SSCR0_ECS) {
615 /*
616 * For setups with external clocking, the PLL and its diviers
617 * are not active. Instead, the SCR bits in SSCR0 can be used
618 * to divide the clock.
619 */
620 pxa_ssp_set_scr(ssp, bclk / rate);
621 }
622
623 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
624 case SND_SOC_DAIFMT_I2S:
625 sspsp = pxa_ssp_read_reg(ssp, SSPSP);
626
627 if (((priv->sysclk / bclk) == 64) && (width == 16)) {
628 /* This is a special case where the bitclk is 64fs
629 * and we're not dealing with 2*32 bits of audio
630 * samples.
631 *
632 * The SSP values used for that are all found out by
633 * trying and failing a lot; some of the registers
634 * needed for that mode are only available on PXA3xx.
635 */
636 if (ssp->type != PXA3xx_SSP)
637 return -EINVAL;
638
639 sspsp |= SSPSP_SFRMWDTH(width * 2);
640 sspsp |= SSPSP_SFRMDLY(width * 4);
641 sspsp |= SSPSP_EDMYSTOP(3);
642 sspsp |= SSPSP_DMYSTOP(3);
643 sspsp |= SSPSP_DMYSTRT(1);
644 } else {
645 /* The frame width is the width the LRCLK is
646 * asserted for; the delay is expressed in
647 * half cycle units. We need the extra cycle
648 * because the data starts clocking out one BCLK
649 * after LRCLK changes polarity.
650 */
651 sspsp |= SSPSP_SFRMWDTH(width + 1);
652 sspsp |= SSPSP_SFRMDLY((width + 1) * 2);
653 sspsp |= SSPSP_DMYSTRT(1);
654 }
655
656 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
657 break;
658 default:
659 break;
660 }
661
662 /* When we use a network mode, we always require TDM slots
663 * - complain loudly and fail if they've not been set up yet.
664 */
665 if ((sscr0 & SSCR0_MOD) && !ttsa) {
666 dev_err(ssp->dev, "No TDM timeslot configured\n");
667 return -EINVAL;
668 }
669
670 dump_registers(ssp);
671
672 return 0;
673}
674
675static void pxa_ssp_set_running_bit(struct snd_pcm_substream *substream,
676 struct ssp_device *ssp, int value)
677{
678 uint32_t sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
679 uint32_t sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
680 uint32_t sspsp = pxa_ssp_read_reg(ssp, SSPSP);
681 uint32_t sssr = pxa_ssp_read_reg(ssp, SSSR);
682
683 if (value && (sscr0 & SSCR0_SSE))
684 pxa_ssp_write_reg(ssp, SSCR0, sscr0 & ~SSCR0_SSE);
685
686 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
687 if (value)
688 sscr1 |= SSCR1_TSRE;
689 else
690 sscr1 &= ~SSCR1_TSRE;
691 } else {
692 if (value)
693 sscr1 |= SSCR1_RSRE;
694 else
695 sscr1 &= ~SSCR1_RSRE;
696 }
697
698 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
699
700 if (value) {
701 pxa_ssp_write_reg(ssp, SSSR, sssr);
702 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
703 pxa_ssp_write_reg(ssp, SSCR0, sscr0 | SSCR0_SSE);
704 }
705}
706
707static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
708 struct snd_soc_dai *cpu_dai)
709{
710 int ret = 0;
711 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
712 struct ssp_device *ssp = priv->ssp;
713 int val;
714
715 switch (cmd) {
716 case SNDRV_PCM_TRIGGER_RESUME:
717 pxa_ssp_enable(ssp);
718 break;
719 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
720 pxa_ssp_set_running_bit(substream, ssp, 1);
721 val = pxa_ssp_read_reg(ssp, SSSR);
722 pxa_ssp_write_reg(ssp, SSSR, val);
723 break;
724 case SNDRV_PCM_TRIGGER_START:
725 pxa_ssp_set_running_bit(substream, ssp, 1);
726 break;
727 case SNDRV_PCM_TRIGGER_STOP:
728 pxa_ssp_set_running_bit(substream, ssp, 0);
729 break;
730 case SNDRV_PCM_TRIGGER_SUSPEND:
731 pxa_ssp_disable(ssp);
732 break;
733 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
734 pxa_ssp_set_running_bit(substream, ssp, 0);
735 break;
736
737 default:
738 ret = -EINVAL;
739 }
740
741 dump_registers(ssp);
742
743 return ret;
744}
745
746static int pxa_ssp_probe(struct snd_soc_dai *dai)
747{
748 struct device *dev = dai->dev;
749 struct ssp_priv *priv;
750 int ret;
751
752 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
753 if (!priv)
754 return -ENOMEM;
755
756 if (dev->of_node) {
757 struct device_node *ssp_handle;
758
759 ssp_handle = of_parse_phandle(dev->of_node, "port", 0);
760 if (!ssp_handle) {
761 dev_err(dev, "unable to get 'port' phandle\n");
762 ret = -ENODEV;
763 goto err_priv;
764 }
765
766 priv->ssp = pxa_ssp_request_of(ssp_handle, "SoC audio");
767 if (priv->ssp == NULL) {
768 ret = -ENODEV;
769 goto err_priv;
770 }
771
772 priv->extclk = devm_clk_get(dev, "extclk");
773 if (IS_ERR(priv->extclk)) {
774 ret = PTR_ERR(priv->extclk);
775 if (ret == -EPROBE_DEFER)
776 goto err_priv;
777
778 priv->extclk = NULL;
779 }
780 } else {
781 priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
782 if (priv->ssp == NULL) {
783 ret = -ENODEV;
784 goto err_priv;
785 }
786 }
787
788 priv->dai_fmt = (unsigned int) -1;
789 snd_soc_dai_set_drvdata(dai, priv);
790
791 return 0;
792
793err_priv:
794 kfree(priv);
795 return ret;
796}
797
798static int pxa_ssp_remove(struct snd_soc_dai *dai)
799{
800 struct ssp_priv *priv = snd_soc_dai_get_drvdata(dai);
801
802 pxa_ssp_free(priv->ssp);
803 kfree(priv);
804 return 0;
805}
806
807#define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
808 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
809 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
810 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
811 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
812
813#define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
814
815static const struct snd_soc_dai_ops pxa_ssp_dai_ops = {
816 .probe = pxa_ssp_probe,
817 .remove = pxa_ssp_remove,
818 .startup = pxa_ssp_startup,
819 .shutdown = pxa_ssp_shutdown,
820 .trigger = pxa_ssp_trigger,
821 .hw_params = pxa_ssp_hw_params,
822 .set_sysclk = pxa_ssp_set_dai_sysclk,
823 .set_fmt = pxa_ssp_set_dai_fmt,
824 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
825 .set_tristate = pxa_ssp_set_dai_tristate,
826};
827
828static struct snd_soc_dai_driver pxa_ssp_dai = {
829 .playback = {
830 .channels_min = 1,
831 .channels_max = 8,
832 .rates = PXA_SSP_RATES,
833 .formats = PXA_SSP_FORMATS,
834 },
835 .capture = {
836 .channels_min = 1,
837 .channels_max = 8,
838 .rates = PXA_SSP_RATES,
839 .formats = PXA_SSP_FORMATS,
840 },
841 .ops = &pxa_ssp_dai_ops,
842};
843
844static const struct snd_soc_component_driver pxa_ssp_component = {
845 .name = "pxa-ssp",
846 .pcm_construct = pxa2xx_soc_pcm_new,
847 .open = pxa2xx_soc_pcm_open,
848 .close = pxa2xx_soc_pcm_close,
849 .hw_params = pxa2xx_soc_pcm_hw_params,
850 .prepare = pxa2xx_soc_pcm_prepare,
851 .trigger = pxa2xx_soc_pcm_trigger,
852 .pointer = pxa2xx_soc_pcm_pointer,
853 .suspend = pxa_ssp_suspend,
854 .resume = pxa_ssp_resume,
855 .legacy_dai_naming = 1,
856};
857
858#ifdef CONFIG_OF
859static const struct of_device_id pxa_ssp_of_ids[] = {
860 { .compatible = "mrvl,pxa-ssp-dai" },
861 {}
862};
863MODULE_DEVICE_TABLE(of, pxa_ssp_of_ids);
864#endif
865
866static int asoc_ssp_probe(struct platform_device *pdev)
867{
868 return devm_snd_soc_register_component(&pdev->dev, &pxa_ssp_component,
869 &pxa_ssp_dai, 1);
870}
871
872static struct platform_driver asoc_ssp_driver = {
873 .driver = {
874 .name = "pxa-ssp-dai",
875 .of_match_table = of_match_ptr(pxa_ssp_of_ids),
876 },
877
878 .probe = asoc_ssp_probe,
879};
880
881module_platform_driver(asoc_ssp_driver);
882
883/* Module information */
884MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
885MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
886MODULE_LICENSE("GPL");
887MODULE_ALIAS("platform:pxa-ssp-dai");
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#include <linux/of.h>
25#include <linux/dmaengine.h>
26
27#include <asm/irq.h>
28
29#include <sound/core.h>
30#include <sound/pcm.h>
31#include <sound/initval.h>
32#include <sound/pcm_params.h>
33#include <sound/soc.h>
34#include <sound/pxa2xx-lib.h>
35#include <sound/dmaengine_pcm.h>
36
37#include "../../arm/pxa2xx-pcm.h"
38#include "pxa-ssp.h"
39
40/*
41 * SSP audio private data
42 */
43struct 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
55static 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
66static 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
74static 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
82static void pxa_ssp_set_dma_params(struct ssp_device *ssp, int width4,
83 int out, struct snd_dmaengine_dai_dma_data *dma)
84{
85 dma->addr_width = width4 ? DMA_SLAVE_BUSWIDTH_4_BYTES :
86 DMA_SLAVE_BUSWIDTH_2_BYTES;
87 dma->maxburst = 16;
88 dma->addr = ssp->phys_base + SSDR;
89}
90
91static int pxa_ssp_startup(struct snd_pcm_substream *substream,
92 struct snd_soc_dai *cpu_dai)
93{
94 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
95 struct ssp_device *ssp = priv->ssp;
96 struct snd_dmaengine_dai_dma_data *dma;
97 int ret = 0;
98
99 if (!cpu_dai->active) {
100 clk_prepare_enable(ssp->clk);
101 pxa_ssp_disable(ssp);
102 }
103
104 dma = kzalloc(sizeof(struct snd_dmaengine_dai_dma_data), GFP_KERNEL);
105 if (!dma)
106 return -ENOMEM;
107
108 dma->filter_data = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
109 &ssp->drcmr_tx : &ssp->drcmr_rx;
110
111 snd_soc_dai_set_dma_data(cpu_dai, substream, dma);
112
113 return ret;
114}
115
116static void pxa_ssp_shutdown(struct snd_pcm_substream *substream,
117 struct snd_soc_dai *cpu_dai)
118{
119 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
120 struct ssp_device *ssp = priv->ssp;
121
122 if (!cpu_dai->active) {
123 pxa_ssp_disable(ssp);
124 clk_disable_unprepare(ssp->clk);
125 }
126
127 kfree(snd_soc_dai_get_dma_data(cpu_dai, substream));
128 snd_soc_dai_set_dma_data(cpu_dai, substream, NULL);
129}
130
131#ifdef CONFIG_PM
132
133static int pxa_ssp_suspend(struct snd_soc_dai *cpu_dai)
134{
135 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
136 struct ssp_device *ssp = priv->ssp;
137
138 if (!cpu_dai->active)
139 clk_prepare_enable(ssp->clk);
140
141 priv->cr0 = __raw_readl(ssp->mmio_base + SSCR0);
142 priv->cr1 = __raw_readl(ssp->mmio_base + SSCR1);
143 priv->to = __raw_readl(ssp->mmio_base + SSTO);
144 priv->psp = __raw_readl(ssp->mmio_base + SSPSP);
145
146 pxa_ssp_disable(ssp);
147 clk_disable_unprepare(ssp->clk);
148 return 0;
149}
150
151static int pxa_ssp_resume(struct snd_soc_dai *cpu_dai)
152{
153 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
154 struct ssp_device *ssp = priv->ssp;
155 uint32_t sssr = SSSR_ROR | SSSR_TUR | SSSR_BCE;
156
157 clk_prepare_enable(ssp->clk);
158
159 __raw_writel(sssr, ssp->mmio_base + SSSR);
160 __raw_writel(priv->cr0 & ~SSCR0_SSE, ssp->mmio_base + SSCR0);
161 __raw_writel(priv->cr1, ssp->mmio_base + SSCR1);
162 __raw_writel(priv->to, ssp->mmio_base + SSTO);
163 __raw_writel(priv->psp, ssp->mmio_base + SSPSP);
164
165 if (cpu_dai->active)
166 pxa_ssp_enable(ssp);
167 else
168 clk_disable_unprepare(ssp->clk);
169
170 return 0;
171}
172
173#else
174#define pxa_ssp_suspend NULL
175#define pxa_ssp_resume NULL
176#endif
177
178/**
179 * ssp_set_clkdiv - set SSP clock divider
180 * @div: serial clock rate divider
181 */
182static void pxa_ssp_set_scr(struct ssp_device *ssp, u32 div)
183{
184 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
185
186 if (ssp->type == PXA25x_SSP) {
187 sscr0 &= ~0x0000ff00;
188 sscr0 |= ((div - 2)/2) << 8; /* 2..512 */
189 } else {
190 sscr0 &= ~0x000fff00;
191 sscr0 |= (div - 1) << 8; /* 1..4096 */
192 }
193 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
194}
195
196/**
197 * pxa_ssp_get_clkdiv - get SSP clock divider
198 */
199static u32 pxa_ssp_get_scr(struct ssp_device *ssp)
200{
201 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
202 u32 div;
203
204 if (ssp->type == PXA25x_SSP)
205 div = ((sscr0 >> 8) & 0xff) * 2 + 2;
206 else
207 div = ((sscr0 >> 8) & 0xfff) + 1;
208 return div;
209}
210
211/*
212 * Set the SSP ports SYSCLK.
213 */
214static int pxa_ssp_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
215 int clk_id, unsigned int freq, int dir)
216{
217 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
218 struct ssp_device *ssp = priv->ssp;
219 int val;
220
221 u32 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
222 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
223
224 dev_dbg(&ssp->pdev->dev,
225 "pxa_ssp_set_dai_sysclk id: %d, clk_id %d, freq %u\n",
226 cpu_dai->id, clk_id, freq);
227
228 switch (clk_id) {
229 case PXA_SSP_CLK_NET_PLL:
230 sscr0 |= SSCR0_MOD;
231 break;
232 case PXA_SSP_CLK_PLL:
233 /* Internal PLL is fixed */
234 if (ssp->type == PXA25x_SSP)
235 priv->sysclk = 1843200;
236 else
237 priv->sysclk = 13000000;
238 break;
239 case PXA_SSP_CLK_EXT:
240 priv->sysclk = freq;
241 sscr0 |= SSCR0_ECS;
242 break;
243 case PXA_SSP_CLK_NET:
244 priv->sysclk = freq;
245 sscr0 |= SSCR0_NCS | SSCR0_MOD;
246 break;
247 case PXA_SSP_CLK_AUDIO:
248 priv->sysclk = 0;
249 pxa_ssp_set_scr(ssp, 1);
250 sscr0 |= SSCR0_ACS;
251 break;
252 default:
253 return -ENODEV;
254 }
255
256 /* The SSP clock must be disabled when changing SSP clock mode
257 * on PXA2xx. On PXA3xx it must be enabled when doing so. */
258 if (ssp->type != PXA3xx_SSP)
259 clk_disable_unprepare(ssp->clk);
260 val = pxa_ssp_read_reg(ssp, SSCR0) | sscr0;
261 pxa_ssp_write_reg(ssp, SSCR0, val);
262 if (ssp->type != PXA3xx_SSP)
263 clk_prepare_enable(ssp->clk);
264
265 return 0;
266}
267
268/*
269 * Set the SSP clock dividers.
270 */
271static int pxa_ssp_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
272 int div_id, int div)
273{
274 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
275 struct ssp_device *ssp = priv->ssp;
276 int val;
277
278 switch (div_id) {
279 case PXA_SSP_AUDIO_DIV_ACDS:
280 val = (pxa_ssp_read_reg(ssp, SSACD) & ~0x7) | SSACD_ACDS(div);
281 pxa_ssp_write_reg(ssp, SSACD, val);
282 break;
283 case PXA_SSP_AUDIO_DIV_SCDB:
284 val = pxa_ssp_read_reg(ssp, SSACD);
285 val &= ~SSACD_SCDB;
286 if (ssp->type == PXA3xx_SSP)
287 val &= ~SSACD_SCDX8;
288 switch (div) {
289 case PXA_SSP_CLK_SCDB_1:
290 val |= SSACD_SCDB;
291 break;
292 case PXA_SSP_CLK_SCDB_4:
293 break;
294 case PXA_SSP_CLK_SCDB_8:
295 if (ssp->type == PXA3xx_SSP)
296 val |= SSACD_SCDX8;
297 else
298 return -EINVAL;
299 break;
300 default:
301 return -EINVAL;
302 }
303 pxa_ssp_write_reg(ssp, SSACD, val);
304 break;
305 case PXA_SSP_DIV_SCR:
306 pxa_ssp_set_scr(ssp, div);
307 break;
308 default:
309 return -ENODEV;
310 }
311
312 return 0;
313}
314
315/*
316 * Configure the PLL frequency pxa27x and (afaik - pxa320 only)
317 */
318static int pxa_ssp_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
319 int source, unsigned int freq_in, unsigned int freq_out)
320{
321 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
322 struct ssp_device *ssp = priv->ssp;
323 u32 ssacd = pxa_ssp_read_reg(ssp, SSACD) & ~0x70;
324
325 if (ssp->type == PXA3xx_SSP)
326 pxa_ssp_write_reg(ssp, SSACDD, 0);
327
328 switch (freq_out) {
329 case 5622000:
330 break;
331 case 11345000:
332 ssacd |= (0x1 << 4);
333 break;
334 case 12235000:
335 ssacd |= (0x2 << 4);
336 break;
337 case 14857000:
338 ssacd |= (0x3 << 4);
339 break;
340 case 32842000:
341 ssacd |= (0x4 << 4);
342 break;
343 case 48000000:
344 ssacd |= (0x5 << 4);
345 break;
346 case 0:
347 /* Disable */
348 break;
349
350 default:
351 /* PXA3xx has a clock ditherer which can be used to generate
352 * a wider range of frequencies - calculate a value for it.
353 */
354 if (ssp->type == PXA3xx_SSP) {
355 u32 val;
356 u64 tmp = 19968;
357 tmp *= 1000000;
358 do_div(tmp, freq_out);
359 val = tmp;
360
361 val = (val << 16) | 64;
362 pxa_ssp_write_reg(ssp, SSACDD, val);
363
364 ssacd |= (0x6 << 4);
365
366 dev_dbg(&ssp->pdev->dev,
367 "Using SSACDD %x to supply %uHz\n",
368 val, freq_out);
369 break;
370 }
371
372 return -EINVAL;
373 }
374
375 pxa_ssp_write_reg(ssp, SSACD, ssacd);
376
377 return 0;
378}
379
380/*
381 * Set the active slots in TDM/Network mode
382 */
383static int pxa_ssp_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
384 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
385{
386 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
387 struct ssp_device *ssp = priv->ssp;
388 u32 sscr0;
389
390 sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
391 sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS);
392
393 /* set slot width */
394 if (slot_width > 16)
395 sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16);
396 else
397 sscr0 |= SSCR0_DataSize(slot_width);
398
399 if (slots > 1) {
400 /* enable network mode */
401 sscr0 |= SSCR0_MOD;
402
403 /* set number of active slots */
404 sscr0 |= SSCR0_SlotsPerFrm(slots);
405
406 /* set active slot mask */
407 pxa_ssp_write_reg(ssp, SSTSA, tx_mask);
408 pxa_ssp_write_reg(ssp, SSRSA, rx_mask);
409 }
410 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
411
412 return 0;
413}
414
415/*
416 * Tristate the SSP DAI lines
417 */
418static int pxa_ssp_set_dai_tristate(struct snd_soc_dai *cpu_dai,
419 int tristate)
420{
421 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
422 struct ssp_device *ssp = priv->ssp;
423 u32 sscr1;
424
425 sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
426 if (tristate)
427 sscr1 &= ~SSCR1_TTE;
428 else
429 sscr1 |= SSCR1_TTE;
430 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
431
432 return 0;
433}
434
435/*
436 * Set up the SSP DAI format.
437 * The SSP Port must be inactive before calling this function as the
438 * physical interface format is changed.
439 */
440static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
441 unsigned int fmt)
442{
443 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
444 struct ssp_device *ssp = priv->ssp;
445 u32 sscr0, sscr1, sspsp, scfr;
446
447 /* check if we need to change anything at all */
448 if (priv->dai_fmt == fmt)
449 return 0;
450
451 /* we can only change the settings if the port is not in use */
452 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
453 dev_err(&ssp->pdev->dev,
454 "can't change hardware dai format: stream is in use");
455 return -EINVAL;
456 }
457
458 /* reset port settings */
459 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) &
460 ~(SSCR0_ECS | SSCR0_NCS | SSCR0_MOD | SSCR0_ACS);
461 sscr1 = SSCR1_RxTresh(8) | SSCR1_TxTresh(7);
462 sspsp = 0;
463
464 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
465 case SND_SOC_DAIFMT_CBM_CFM:
466 sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR;
467 break;
468 case SND_SOC_DAIFMT_CBM_CFS:
469 sscr1 |= SSCR1_SCLKDIR | SSCR1_SCFR;
470 break;
471 case SND_SOC_DAIFMT_CBS_CFS:
472 break;
473 default:
474 return -EINVAL;
475 }
476
477 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
478 case SND_SOC_DAIFMT_NB_NF:
479 sspsp |= SSPSP_SFRMP;
480 break;
481 case SND_SOC_DAIFMT_NB_IF:
482 break;
483 case SND_SOC_DAIFMT_IB_IF:
484 sspsp |= SSPSP_SCMODE(2);
485 break;
486 case SND_SOC_DAIFMT_IB_NF:
487 sspsp |= SSPSP_SCMODE(2) | SSPSP_SFRMP;
488 break;
489 default:
490 return -EINVAL;
491 }
492
493 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
494 case SND_SOC_DAIFMT_I2S:
495 sscr0 |= SSCR0_PSP;
496 sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
497 /* See hw_params() */
498 break;
499
500 case SND_SOC_DAIFMT_DSP_A:
501 sspsp |= SSPSP_FSRT;
502 case SND_SOC_DAIFMT_DSP_B:
503 sscr0 |= SSCR0_MOD | SSCR0_PSP;
504 sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
505 break;
506
507 default:
508 return -EINVAL;
509 }
510
511 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
512 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
513 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
514
515 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
516 case SND_SOC_DAIFMT_CBM_CFM:
517 case SND_SOC_DAIFMT_CBM_CFS:
518 scfr = pxa_ssp_read_reg(ssp, SSCR1) | SSCR1_SCFR;
519 pxa_ssp_write_reg(ssp, SSCR1, scfr);
520
521 while (pxa_ssp_read_reg(ssp, SSSR) & SSSR_BSY)
522 cpu_relax();
523 break;
524 }
525
526 dump_registers(ssp);
527
528 /* Since we are configuring the timings for the format by hand
529 * we have to defer some things until hw_params() where we
530 * know parameters like the sample size.
531 */
532 priv->dai_fmt = fmt;
533
534 return 0;
535}
536
537/*
538 * Set the SSP audio DMA parameters and sample size.
539 * Can be called multiple times by oss emulation.
540 */
541static int pxa_ssp_hw_params(struct snd_pcm_substream *substream,
542 struct snd_pcm_hw_params *params,
543 struct snd_soc_dai *cpu_dai)
544{
545 struct ssp_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
546 struct ssp_device *ssp = priv->ssp;
547 int chn = params_channels(params);
548 u32 sscr0;
549 u32 sspsp;
550 int width = snd_pcm_format_physical_width(params_format(params));
551 int ttsa = pxa_ssp_read_reg(ssp, SSTSA) & 0xf;
552 struct snd_dmaengine_dai_dma_data *dma_data;
553
554 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
555
556 /* Network mode with one active slot (ttsa == 1) can be used
557 * to force 16-bit frame width on the wire (for S16_LE), even
558 * with two channels. Use 16-bit DMA transfers for this case.
559 */
560 pxa_ssp_set_dma_params(ssp,
561 ((chn == 2) && (ttsa != 1)) || (width == 32),
562 substream->stream == SNDRV_PCM_STREAM_PLAYBACK, dma_data);
563
564 /* we can only change the settings if the port is not in use */
565 if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE)
566 return 0;
567
568 /* clear selected SSP bits */
569 sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
570
571 /* bit size */
572 switch (params_format(params)) {
573 case SNDRV_PCM_FORMAT_S16_LE:
574 if (ssp->type == PXA3xx_SSP)
575 sscr0 |= SSCR0_FPCKE;
576 sscr0 |= SSCR0_DataSize(16);
577 break;
578 case SNDRV_PCM_FORMAT_S24_LE:
579 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
580 break;
581 case SNDRV_PCM_FORMAT_S32_LE:
582 sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));
583 break;
584 }
585 pxa_ssp_write_reg(ssp, SSCR0, sscr0);
586
587 switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
588 case SND_SOC_DAIFMT_I2S:
589 sspsp = pxa_ssp_read_reg(ssp, SSPSP);
590
591 if ((pxa_ssp_get_scr(ssp) == 4) && (width == 16)) {
592 /* This is a special case where the bitclk is 64fs
593 * and we're not dealing with 2*32 bits of audio
594 * samples.
595 *
596 * The SSP values used for that are all found out by
597 * trying and failing a lot; some of the registers
598 * needed for that mode are only available on PXA3xx.
599 */
600 if (ssp->type != PXA3xx_SSP)
601 return -EINVAL;
602
603 sspsp |= SSPSP_SFRMWDTH(width * 2);
604 sspsp |= SSPSP_SFRMDLY(width * 4);
605 sspsp |= SSPSP_EDMYSTOP(3);
606 sspsp |= SSPSP_DMYSTOP(3);
607 sspsp |= SSPSP_DMYSTRT(1);
608 } else {
609 /* The frame width is the width the LRCLK is
610 * asserted for; the delay is expressed in
611 * half cycle units. We need the extra cycle
612 * because the data starts clocking out one BCLK
613 * after LRCLK changes polarity.
614 */
615 sspsp |= SSPSP_SFRMWDTH(width + 1);
616 sspsp |= SSPSP_SFRMDLY((width + 1) * 2);
617 sspsp |= SSPSP_DMYSTRT(1);
618 }
619
620 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
621 break;
622 default:
623 break;
624 }
625
626 /* When we use a network mode, we always require TDM slots
627 * - complain loudly and fail if they've not been set up yet.
628 */
629 if ((sscr0 & SSCR0_MOD) && !ttsa) {
630 dev_err(&ssp->pdev->dev, "No TDM timeslot configured\n");
631 return -EINVAL;
632 }
633
634 dump_registers(ssp);
635
636 return 0;
637}
638
639static void pxa_ssp_set_running_bit(struct snd_pcm_substream *substream,
640 struct ssp_device *ssp, int value)
641{
642 uint32_t sscr0 = pxa_ssp_read_reg(ssp, SSCR0);
643 uint32_t sscr1 = pxa_ssp_read_reg(ssp, SSCR1);
644 uint32_t sspsp = pxa_ssp_read_reg(ssp, SSPSP);
645 uint32_t sssr = pxa_ssp_read_reg(ssp, SSSR);
646
647 if (value && (sscr0 & SSCR0_SSE))
648 pxa_ssp_write_reg(ssp, SSCR0, sscr0 & ~SSCR0_SSE);
649
650 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
651 if (value)
652 sscr1 |= SSCR1_TSRE;
653 else
654 sscr1 &= ~SSCR1_TSRE;
655 } else {
656 if (value)
657 sscr1 |= SSCR1_RSRE;
658 else
659 sscr1 &= ~SSCR1_RSRE;
660 }
661
662 pxa_ssp_write_reg(ssp, SSCR1, sscr1);
663
664 if (value) {
665 pxa_ssp_write_reg(ssp, SSSR, sssr);
666 pxa_ssp_write_reg(ssp, SSPSP, sspsp);
667 pxa_ssp_write_reg(ssp, SSCR0, sscr0 | SSCR0_SSE);
668 }
669}
670
671static 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 pxa_ssp_set_running_bit(substream, ssp, 1);
685 val = pxa_ssp_read_reg(ssp, SSSR);
686 pxa_ssp_write_reg(ssp, SSSR, val);
687 break;
688 case SNDRV_PCM_TRIGGER_START:
689 pxa_ssp_set_running_bit(substream, ssp, 1);
690 break;
691 case SNDRV_PCM_TRIGGER_STOP:
692 pxa_ssp_set_running_bit(substream, ssp, 0);
693 break;
694 case SNDRV_PCM_TRIGGER_SUSPEND:
695 pxa_ssp_disable(ssp);
696 break;
697 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
698 pxa_ssp_set_running_bit(substream, ssp, 0);
699 break;
700
701 default:
702 ret = -EINVAL;
703 }
704
705 dump_registers(ssp);
706
707 return ret;
708}
709
710static int pxa_ssp_probe(struct snd_soc_dai *dai)
711{
712 struct device *dev = dai->dev;
713 struct ssp_priv *priv;
714 int ret;
715
716 priv = kzalloc(sizeof(struct ssp_priv), GFP_KERNEL);
717 if (!priv)
718 return -ENOMEM;
719
720 if (dev->of_node) {
721 struct device_node *ssp_handle;
722
723 ssp_handle = of_parse_phandle(dev->of_node, "port", 0);
724 if (!ssp_handle) {
725 dev_err(dev, "unable to get 'port' phandle\n");
726 ret = -ENODEV;
727 goto err_priv;
728 }
729
730 priv->ssp = pxa_ssp_request_of(ssp_handle, "SoC audio");
731 if (priv->ssp == NULL) {
732 ret = -ENODEV;
733 goto err_priv;
734 }
735 } else {
736 priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
737 if (priv->ssp == NULL) {
738 ret = -ENODEV;
739 goto err_priv;
740 }
741 }
742
743 priv->dai_fmt = (unsigned int) -1;
744 snd_soc_dai_set_drvdata(dai, priv);
745
746 return 0;
747
748err_priv:
749 kfree(priv);
750 return ret;
751}
752
753static int pxa_ssp_remove(struct snd_soc_dai *dai)
754{
755 struct ssp_priv *priv = snd_soc_dai_get_drvdata(dai);
756
757 pxa_ssp_free(priv->ssp);
758 kfree(priv);
759 return 0;
760}
761
762#define PXA_SSP_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
763 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
764 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
765 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
766 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
767
768#define PXA_SSP_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
769
770static const struct snd_soc_dai_ops pxa_ssp_dai_ops = {
771 .startup = pxa_ssp_startup,
772 .shutdown = pxa_ssp_shutdown,
773 .trigger = pxa_ssp_trigger,
774 .hw_params = pxa_ssp_hw_params,
775 .set_sysclk = pxa_ssp_set_dai_sysclk,
776 .set_clkdiv = pxa_ssp_set_dai_clkdiv,
777 .set_pll = pxa_ssp_set_dai_pll,
778 .set_fmt = pxa_ssp_set_dai_fmt,
779 .set_tdm_slot = pxa_ssp_set_dai_tdm_slot,
780 .set_tristate = pxa_ssp_set_dai_tristate,
781};
782
783static struct snd_soc_dai_driver pxa_ssp_dai = {
784 .probe = pxa_ssp_probe,
785 .remove = pxa_ssp_remove,
786 .suspend = pxa_ssp_suspend,
787 .resume = pxa_ssp_resume,
788 .playback = {
789 .channels_min = 1,
790 .channels_max = 8,
791 .rates = PXA_SSP_RATES,
792 .formats = PXA_SSP_FORMATS,
793 },
794 .capture = {
795 .channels_min = 1,
796 .channels_max = 8,
797 .rates = PXA_SSP_RATES,
798 .formats = PXA_SSP_FORMATS,
799 },
800 .ops = &pxa_ssp_dai_ops,
801};
802
803static const struct snd_soc_component_driver pxa_ssp_component = {
804 .name = "pxa-ssp",
805};
806
807#ifdef CONFIG_OF
808static const struct of_device_id pxa_ssp_of_ids[] = {
809 { .compatible = "mrvl,pxa-ssp-dai" },
810 {}
811};
812MODULE_DEVICE_TABLE(of, pxa_ssp_of_ids);
813#endif
814
815static int asoc_ssp_probe(struct platform_device *pdev)
816{
817 return devm_snd_soc_register_component(&pdev->dev, &pxa_ssp_component,
818 &pxa_ssp_dai, 1);
819}
820
821static struct platform_driver asoc_ssp_driver = {
822 .driver = {
823 .name = "pxa-ssp-dai",
824 .of_match_table = of_match_ptr(pxa_ssp_of_ids),
825 },
826
827 .probe = asoc_ssp_probe,
828};
829
830module_platform_driver(asoc_ssp_driver);
831
832/* Module information */
833MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
834MODULE_DESCRIPTION("PXA SSP/PCM SoC Interface");
835MODULE_LICENSE("GPL");
836MODULE_ALIAS("platform:pxa-ssp-dai");