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-rw-r--r--sound/soc/imx/mxc-ssi.c868
1 files changed, 868 insertions, 0 deletions
diff --git a/sound/soc/imx/mxc-ssi.c b/sound/soc/imx/mxc-ssi.c
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index 000000000000..3806ff2c0cd4
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+++ b/sound/soc/imx/mxc-ssi.c
@@ -0,0 +1,868 @@
1/*
2 * mxc-ssi.c -- SSI driver for Freescale IMX
3 *
4 * Copyright 2006 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood
6 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
7 *
8 * Based on mxc-alsa-mc13783 (C) 2006 Freescale.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 * TODO:
16 * Need to rework SSI register defs when new defs go into mainline.
17 * Add support for TDM and FIFO 1.
18 * Add support for i.mx3x DMA interface.
19 *
20 */
21
22
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/platform_device.h>
26#include <linux/slab.h>
27#include <linux/dma-mapping.h>
28#include <linux/clk.h>
29#include <sound/core.h>
30#include <sound/pcm.h>
31#include <sound/pcm_params.h>
32#include <sound/soc.h>
33#include <mach/dma-mx1-mx2.h>
34#include <asm/mach-types.h>
35
36#include "mxc-ssi.h"
37#include "mx1_mx2-pcm.h"
38
39#define SSI1_PORT 0
40#define SSI2_PORT 1
41
42static int ssi_active[2] = {0, 0};
43
44/* DMA information for mx1_mx2 platforms */
45static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_out0 = {
46 .name = "SSI1 PCM Stereo out 0",
47 .transfer_type = DMA_MODE_WRITE,
48 .per_address = SSI1_BASE_ADDR + STX0,
49 .event_id = DMA_REQ_SSI1_TX0,
50 .watermark_level = TXFIFO_WATERMARK,
51 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
52 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
53};
54
55static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_out1 = {
56 .name = "SSI1 PCM Stereo out 1",
57 .transfer_type = DMA_MODE_WRITE,
58 .per_address = SSI1_BASE_ADDR + STX1,
59 .event_id = DMA_REQ_SSI1_TX1,
60 .watermark_level = TXFIFO_WATERMARK,
61 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
62 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
63};
64
65static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_in0 = {
66 .name = "SSI1 PCM Stereo in 0",
67 .transfer_type = DMA_MODE_READ,
68 .per_address = SSI1_BASE_ADDR + SRX0,
69 .event_id = DMA_REQ_SSI1_RX0,
70 .watermark_level = RXFIFO_WATERMARK,
71 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
72 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
73};
74
75static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_in1 = {
76 .name = "SSI1 PCM Stereo in 1",
77 .transfer_type = DMA_MODE_READ,
78 .per_address = SSI1_BASE_ADDR + SRX1,
79 .event_id = DMA_REQ_SSI1_RX1,
80 .watermark_level = RXFIFO_WATERMARK,
81 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
82 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
83};
84
85static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_out0 = {
86 .name = "SSI2 PCM Stereo out 0",
87 .transfer_type = DMA_MODE_WRITE,
88 .per_address = SSI2_BASE_ADDR + STX0,
89 .event_id = DMA_REQ_SSI2_TX0,
90 .watermark_level = TXFIFO_WATERMARK,
91 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
92 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
93};
94
95static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_out1 = {
96 .name = "SSI2 PCM Stereo out 1",
97 .transfer_type = DMA_MODE_WRITE,
98 .per_address = SSI2_BASE_ADDR + STX1,
99 .event_id = DMA_REQ_SSI2_TX1,
100 .watermark_level = TXFIFO_WATERMARK,
101 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
102 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
103};
104
105static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_in0 = {
106 .name = "SSI2 PCM Stereo in 0",
107 .transfer_type = DMA_MODE_READ,
108 .per_address = SSI2_BASE_ADDR + SRX0,
109 .event_id = DMA_REQ_SSI2_RX0,
110 .watermark_level = RXFIFO_WATERMARK,
111 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
112 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
113};
114
115static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_in1 = {
116 .name = "SSI2 PCM Stereo in 1",
117 .transfer_type = DMA_MODE_READ,
118 .per_address = SSI2_BASE_ADDR + SRX1,
119 .event_id = DMA_REQ_SSI2_RX1,
120 .watermark_level = RXFIFO_WATERMARK,
121 .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
122 .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
123};
124
125static struct clk *ssi_clk0, *ssi_clk1;
126
127int get_ssi_clk(int ssi, struct device *dev)
128{
129 switch (ssi) {
130 case 0:
131 ssi_clk0 = clk_get(dev, "ssi1");
132 if (IS_ERR(ssi_clk0))
133 return PTR_ERR(ssi_clk0);
134 return 0;
135 case 1:
136 ssi_clk1 = clk_get(dev, "ssi2");
137 if (IS_ERR(ssi_clk1))
138 return PTR_ERR(ssi_clk1);
139 return 0;
140 default:
141 return -EINVAL;
142 }
143}
144EXPORT_SYMBOL(get_ssi_clk);
145
146void put_ssi_clk(int ssi)
147{
148 switch (ssi) {
149 case 0:
150 clk_put(ssi_clk0);
151 ssi_clk0 = NULL;
152 break;
153 case 1:
154 clk_put(ssi_clk1);
155 ssi_clk1 = NULL;
156 break;
157 }
158}
159EXPORT_SYMBOL(put_ssi_clk);
160
161/*
162 * SSI system clock configuration.
163 * Should only be called when port is inactive (i.e. SSIEN = 0).
164 */
165static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
166 int clk_id, unsigned int freq, int dir)
167{
168 u32 scr;
169
170 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
171 scr = SSI1_SCR;
172 pr_debug("%s: SCR for SSI1 is %x\n", __func__, scr);
173 } else {
174 scr = SSI2_SCR;
175 pr_debug("%s: SCR for SSI2 is %x\n", __func__, scr);
176 }
177
178 if (scr & SSI_SCR_SSIEN) {
179 printk(KERN_WARNING "Warning ssi already enabled\n");
180 return 0;
181 }
182
183 switch (clk_id) {
184 case IMX_SSP_SYS_CLK:
185 if (dir == SND_SOC_CLOCK_OUT) {
186 scr |= SSI_SCR_SYS_CLK_EN;
187 pr_debug("%s: clk of is output\n", __func__);
188 } else {
189 scr &= ~SSI_SCR_SYS_CLK_EN;
190 pr_debug("%s: clk of is input\n", __func__);
191 }
192 break;
193 default:
194 return -EINVAL;
195 }
196
197 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
198 pr_debug("%s: writeback of SSI1_SCR\n", __func__);
199 SSI1_SCR = scr;
200 } else {
201 pr_debug("%s: writeback of SSI2_SCR\n", __func__);
202 SSI2_SCR = scr;
203 }
204
205 return 0;
206}
207
208/*
209 * SSI Clock dividers
210 * Should only be called when port is inactive (i.e. SSIEN = 0).
211 */
212static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
213 int div_id, int div)
214{
215 u32 stccr, srccr;
216
217 pr_debug("%s\n", __func__);
218 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
219 if (SSI1_SCR & SSI_SCR_SSIEN)
220 return 0;
221 srccr = SSI1_STCCR;
222 stccr = SSI1_STCCR;
223 } else {
224 if (SSI2_SCR & SSI_SCR_SSIEN)
225 return 0;
226 srccr = SSI2_STCCR;
227 stccr = SSI2_STCCR;
228 }
229
230 switch (div_id) {
231 case IMX_SSI_TX_DIV_2:
232 stccr &= ~SSI_STCCR_DIV2;
233 stccr |= div;
234 break;
235 case IMX_SSI_TX_DIV_PSR:
236 stccr &= ~SSI_STCCR_PSR;
237 stccr |= div;
238 break;
239 case IMX_SSI_TX_DIV_PM:
240 stccr &= ~0xff;
241 stccr |= SSI_STCCR_PM(div);
242 break;
243 case IMX_SSI_RX_DIV_2:
244 stccr &= ~SSI_STCCR_DIV2;
245 stccr |= div;
246 break;
247 case IMX_SSI_RX_DIV_PSR:
248 stccr &= ~SSI_STCCR_PSR;
249 stccr |= div;
250 break;
251 case IMX_SSI_RX_DIV_PM:
252 stccr &= ~0xff;
253 stccr |= SSI_STCCR_PM(div);
254 break;
255 default:
256 return -EINVAL;
257 }
258
259 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
260 SSI1_STCCR = stccr;
261 SSI1_SRCCR = srccr;
262 } else {
263 SSI2_STCCR = stccr;
264 SSI2_SRCCR = srccr;
265 }
266 return 0;
267}
268
269/*
270 * SSI Network Mode or TDM slots configuration.
271 * Should only be called when port is inactive (i.e. SSIEN = 0).
272 */
273static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
274 unsigned int mask, int slots)
275{
276 u32 stmsk, srmsk, stccr;
277
278 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
279 if (SSI1_SCR & SSI_SCR_SSIEN) {
280 printk(KERN_WARNING "Warning ssi already enabled\n");
281 return 0;
282 }
283 stccr = SSI1_STCCR;
284 } else {
285 if (SSI2_SCR & SSI_SCR_SSIEN) {
286 printk(KERN_WARNING "Warning ssi already enabled\n");
287 return 0;
288 }
289 stccr = SSI2_STCCR;
290 }
291
292 stmsk = srmsk = mask;
293 stccr &= ~SSI_STCCR_DC_MASK;
294 stccr |= SSI_STCCR_DC(slots - 1);
295
296 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
297 SSI1_STMSK = stmsk;
298 SSI1_SRMSK = srmsk;
299 SSI1_SRCCR = SSI1_STCCR = stccr;
300 } else {
301 SSI2_STMSK = stmsk;
302 SSI2_SRMSK = srmsk;
303 SSI2_SRCCR = SSI2_STCCR = stccr;
304 }
305
306 return 0;
307}
308
309/*
310 * SSI DAI format configuration.
311 * Should only be called when port is inactive (i.e. SSIEN = 0).
312 * Note: We don't use the I2S modes but instead manually configure the
313 * SSI for I2S.
314 */
315static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai,
316 unsigned int fmt)
317{
318 u32 stcr = 0, srcr = 0, scr;
319
320 /*
321 * This is done to avoid this function to modify
322 * previous set values in stcr
323 */
324 stcr = SSI1_STCR;
325
326 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
327 scr = SSI1_SCR & ~(SSI_SCR_SYN | SSI_SCR_NET);
328 else
329 scr = SSI2_SCR & ~(SSI_SCR_SYN | SSI_SCR_NET);
330
331 if (scr & SSI_SCR_SSIEN) {
332 printk(KERN_WARNING "Warning ssi already enabled\n");
333 return 0;
334 }
335
336 /* DAI mode */
337 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
338 case SND_SOC_DAIFMT_I2S:
339 /* data on rising edge of bclk, frame low 1clk before data */
340 stcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0;
341 srcr |= SSI_SRCR_RFSI | SSI_SRCR_REFS | SSI_SRCR_RXBIT0;
342 break;
343 case SND_SOC_DAIFMT_LEFT_J:
344 /* data on rising edge of bclk, frame high with data */
345 stcr |= SSI_STCR_TXBIT0;
346 srcr |= SSI_SRCR_RXBIT0;
347 break;
348 case SND_SOC_DAIFMT_DSP_B:
349 /* data on rising edge of bclk, frame high with data */
350 stcr |= SSI_STCR_TFSL;
351 srcr |= SSI_SRCR_RFSL;
352 break;
353 case SND_SOC_DAIFMT_DSP_A:
354 /* data on rising edge of bclk, frame high 1clk before data */
355 stcr |= SSI_STCR_TFSL | SSI_STCR_TEFS;
356 srcr |= SSI_SRCR_RFSL | SSI_SRCR_REFS;
357 break;
358 }
359
360 /* DAI clock inversion */
361 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
362 case SND_SOC_DAIFMT_IB_IF:
363 stcr |= SSI_STCR_TFSI;
364 stcr &= ~SSI_STCR_TSCKP;
365 srcr |= SSI_SRCR_RFSI;
366 srcr &= ~SSI_SRCR_RSCKP;
367 break;
368 case SND_SOC_DAIFMT_IB_NF:
369 stcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI);
370 srcr &= ~(SSI_SRCR_RSCKP | SSI_SRCR_RFSI);
371 break;
372 case SND_SOC_DAIFMT_NB_IF:
373 stcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP;
374 srcr |= SSI_SRCR_RFSI | SSI_SRCR_RSCKP;
375 break;
376 case SND_SOC_DAIFMT_NB_NF:
377 stcr &= ~SSI_STCR_TFSI;
378 stcr |= SSI_STCR_TSCKP;
379 srcr &= ~SSI_SRCR_RFSI;
380 srcr |= SSI_SRCR_RSCKP;
381 break;
382 }
383
384 /* DAI clock master masks */
385 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
386 case SND_SOC_DAIFMT_CBS_CFS:
387 stcr |= SSI_STCR_TFDIR | SSI_STCR_TXDIR;
388 srcr |= SSI_SRCR_RFDIR | SSI_SRCR_RXDIR;
389 break;
390 case SND_SOC_DAIFMT_CBM_CFS:
391 stcr |= SSI_STCR_TFDIR;
392 srcr |= SSI_SRCR_RFDIR;
393 break;
394 case SND_SOC_DAIFMT_CBS_CFM:
395 stcr |= SSI_STCR_TXDIR;
396 srcr |= SSI_SRCR_RXDIR;
397 break;
398 }
399
400 /* sync */
401 if (!(fmt & SND_SOC_DAIFMT_ASYNC))
402 scr |= SSI_SCR_SYN;
403
404 /* tdm - only for stereo atm */
405 if (fmt & SND_SOC_DAIFMT_TDM)
406 scr |= SSI_SCR_NET;
407
408 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
409 SSI1_STCR = stcr;
410 SSI1_SRCR = srcr;
411 SSI1_SCR = scr;
412 } else {
413 SSI2_STCR = stcr;
414 SSI2_SRCR = srcr;
415 SSI2_SCR = scr;
416 }
417
418 return 0;
419}
420
421static int imx_ssi_startup(struct snd_pcm_substream *substream,
422 struct snd_soc_dai *dai)
423{
424 struct snd_soc_pcm_runtime *rtd = substream->private_data;
425 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
426
427 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
428 /* set up TX DMA params */
429 switch (cpu_dai->id) {
430 case IMX_DAI_SSI0:
431 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out0;
432 break;
433 case IMX_DAI_SSI1:
434 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out1;
435 break;
436 case IMX_DAI_SSI2:
437 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out0;
438 break;
439 case IMX_DAI_SSI3:
440 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out1;
441 }
442 pr_debug("%s: (playback)\n", __func__);
443 } else {
444 /* set up RX DMA params */
445 switch (cpu_dai->id) {
446 case IMX_DAI_SSI0:
447 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in0;
448 break;
449 case IMX_DAI_SSI1:
450 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in1;
451 break;
452 case IMX_DAI_SSI2:
453 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in0;
454 break;
455 case IMX_DAI_SSI3:
456 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in1;
457 }
458 pr_debug("%s: (capture)\n", __func__);
459 }
460
461 /*
462 * we cant really change any SSI values after SSI is enabled
463 * need to fix in software for max flexibility - lrg
464 */
465 if (cpu_dai->active) {
466 printk(KERN_WARNING "Warning ssi already enabled\n");
467 return 0;
468 }
469
470 /* reset the SSI port - Sect 45.4.4 */
471 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
472
473 if (!ssi_clk0)
474 return -EINVAL;
475
476 if (ssi_active[SSI1_PORT]++) {
477 pr_debug("%s: exit before reset\n", __func__);
478 return 0;
479 }
480
481 /* SSI1 Reset */
482 SSI1_SCR = 0;
483
484 SSI1_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) |
485 SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) |
486 SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) |
487 SSI_SFCSR_TFWM0(TXFIFO_WATERMARK);
488 } else {
489
490 if (!ssi_clk1)
491 return -EINVAL;
492
493 if (ssi_active[SSI2_PORT]++) {
494 pr_debug("%s: exit before reset\n", __func__);
495 return 0;
496 }
497
498 /* SSI2 Reset */
499 SSI2_SCR = 0;
500
501 SSI2_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) |
502 SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) |
503 SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) |
504 SSI_SFCSR_TFWM0(TXFIFO_WATERMARK);
505 }
506
507 return 0;
508}
509
510int imx_ssi_hw_tx_params(struct snd_pcm_substream *substream,
511 struct snd_pcm_hw_params *params)
512{
513 struct snd_soc_pcm_runtime *rtd = substream->private_data;
514 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
515 u32 stccr, stcr, sier;
516
517 pr_debug("%s\n", __func__);
518
519 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
520 stccr = SSI1_STCCR & ~SSI_STCCR_WL_MASK;
521 stcr = SSI1_STCR;
522 sier = SSI1_SIER;
523 } else {
524 stccr = SSI2_STCCR & ~SSI_STCCR_WL_MASK;
525 stcr = SSI2_STCR;
526 sier = SSI2_SIER;
527 }
528
529 /* DAI data (word) size */
530 switch (params_format(params)) {
531 case SNDRV_PCM_FORMAT_S16_LE:
532 stccr |= SSI_STCCR_WL(16);
533 break;
534 case SNDRV_PCM_FORMAT_S20_3LE:
535 stccr |= SSI_STCCR_WL(20);
536 break;
537 case SNDRV_PCM_FORMAT_S24_LE:
538 stccr |= SSI_STCCR_WL(24);
539 break;
540 }
541
542 /* enable interrupts */
543 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
544 stcr |= SSI_STCR_TFEN0;
545 else
546 stcr |= SSI_STCR_TFEN1;
547 sier |= SSI_SIER_TDMAE;
548
549 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
550 SSI1_STCR = stcr;
551 SSI1_STCCR = stccr;
552 SSI1_SIER = sier;
553 } else {
554 SSI2_STCR = stcr;
555 SSI2_STCCR = stccr;
556 SSI2_SIER = sier;
557 }
558
559 return 0;
560}
561
562int imx_ssi_hw_rx_params(struct snd_pcm_substream *substream,
563 struct snd_pcm_hw_params *params)
564{
565 struct snd_soc_pcm_runtime *rtd = substream->private_data;
566 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
567 u32 srccr, srcr, sier;
568
569 pr_debug("%s\n", __func__);
570
571 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
572 srccr = SSI1_SRCCR & ~SSI_SRCCR_WL_MASK;
573 srcr = SSI1_SRCR;
574 sier = SSI1_SIER;
575 } else {
576 srccr = SSI2_SRCCR & ~SSI_SRCCR_WL_MASK;
577 srcr = SSI2_SRCR;
578 sier = SSI2_SIER;
579 }
580
581 /* DAI data (word) size */
582 switch (params_format(params)) {
583 case SNDRV_PCM_FORMAT_S16_LE:
584 srccr |= SSI_SRCCR_WL(16);
585 break;
586 case SNDRV_PCM_FORMAT_S20_3LE:
587 srccr |= SSI_SRCCR_WL(20);
588 break;
589 case SNDRV_PCM_FORMAT_S24_LE:
590 srccr |= SSI_SRCCR_WL(24);
591 break;
592 }
593
594 /* enable interrupts */
595 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
596 srcr |= SSI_SRCR_RFEN0;
597 else
598 srcr |= SSI_SRCR_RFEN1;
599 sier |= SSI_SIER_RDMAE;
600
601 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
602 SSI1_SRCR = srcr;
603 SSI1_SRCCR = srccr;
604 SSI1_SIER = sier;
605 } else {
606 SSI2_SRCR = srcr;
607 SSI2_SRCCR = srccr;
608 SSI2_SIER = sier;
609 }
610
611 return 0;
612}
613
614/*
615 * Should only be called when port is inactive (i.e. SSIEN = 0),
616 * although can be called multiple times by upper layers.
617 */
618int imx_ssi_hw_params(struct snd_pcm_substream *substream,
619 struct snd_pcm_hw_params *params,
620 struct snd_soc_dai *dai)
621{
622 struct snd_soc_pcm_runtime *rtd = substream->private_data;
623 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
624
625 int ret;
626
627 /* cant change any parameters when SSI is running */
628 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
629 if (SSI1_SCR & SSI_SCR_SSIEN) {
630 printk(KERN_WARNING "Warning ssi already enabled\n");
631 return 0;
632 }
633 } else {
634 if (SSI2_SCR & SSI_SCR_SSIEN) {
635 printk(KERN_WARNING "Warning ssi already enabled\n");
636 return 0;
637 }
638 }
639
640 /*
641 * Configure both tx and rx params with the same settings. This is
642 * really a harware restriction because SSI must be disabled until
643 * we can change those values. If there is an active audio stream in
644 * one direction, enabling the other direction with different
645 * settings would mean disturbing the running one.
646 */
647 ret = imx_ssi_hw_tx_params(substream, params);
648 if (ret < 0)
649 return ret;
650 return imx_ssi_hw_rx_params(substream, params);
651}
652
653int imx_ssi_prepare(struct snd_pcm_substream *substream,
654 struct snd_soc_dai *dai)
655{
656 struct snd_soc_pcm_runtime *rtd = substream->private_data;
657 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
658 int ret;
659
660 pr_debug("%s\n", __func__);
661
662 /* Enable clks here to follow SSI recommended init sequence */
663 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
664 ret = clk_enable(ssi_clk0);
665 if (ret < 0)
666 printk(KERN_ERR "Unable to enable ssi_clk0\n");
667 } else {
668 ret = clk_enable(ssi_clk1);
669 if (ret < 0)
670 printk(KERN_ERR "Unable to enable ssi_clk1\n");
671 }
672
673 return 0;
674}
675
676static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
677 struct snd_soc_dai *dai)
678{
679 struct snd_soc_pcm_runtime *rtd = substream->private_data;
680 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
681 u32 scr;
682
683 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
684 scr = SSI1_SCR;
685 else
686 scr = SSI2_SCR;
687
688 switch (cmd) {
689 case SNDRV_PCM_TRIGGER_START:
690 case SNDRV_PCM_TRIGGER_RESUME:
691 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
692 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
693 scr |= SSI_SCR_TE | SSI_SCR_SSIEN;
694 else
695 scr |= SSI_SCR_RE | SSI_SCR_SSIEN;
696 break;
697 case SNDRV_PCM_TRIGGER_SUSPEND:
698 case SNDRV_PCM_TRIGGER_STOP:
699 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
700 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
701 scr &= ~SSI_SCR_TE;
702 else
703 scr &= ~SSI_SCR_RE;
704 break;
705 default:
706 return -EINVAL;
707 }
708
709 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
710 SSI1_SCR = scr;
711 else
712 SSI2_SCR = scr;
713
714 return 0;
715}
716
717static void imx_ssi_shutdown(struct snd_pcm_substream *substream,
718 struct snd_soc_dai *dai)
719{
720 struct snd_soc_pcm_runtime *rtd = substream->private_data;
721 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
722
723 /* shutdown SSI if neither Tx or Rx is active */
724 if (!cpu_dai->active) {
725
726 if (cpu_dai->id == IMX_DAI_SSI0 ||
727 cpu_dai->id == IMX_DAI_SSI2) {
728
729 if (--ssi_active[SSI1_PORT] > 1)
730 return;
731
732 SSI1_SCR = 0;
733 clk_disable(ssi_clk0);
734 } else {
735 if (--ssi_active[SSI2_PORT])
736 return;
737 SSI2_SCR = 0;
738 clk_disable(ssi_clk1);
739 }
740 }
741}
742
743#ifdef CONFIG_PM
744static int imx_ssi_suspend(struct platform_device *dev,
745 struct snd_soc_dai *dai)
746{
747 return 0;
748}
749
750static int imx_ssi_resume(struct platform_device *pdev,
751 struct snd_soc_dai *dai)
752{
753 return 0;
754}
755
756#else
757#define imx_ssi_suspend NULL
758#define imx_ssi_resume NULL
759#endif
760
761#define IMX_SSI_RATES \
762 (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_88200 | \
766 SNDRV_PCM_RATE_96000)
767
768#define IMX_SSI_BITS \
769 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
770 SNDRV_PCM_FMTBIT_S24_LE)
771
772static struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = {
773 .startup = imx_ssi_startup,
774 .shutdown = imx_ssi_shutdown,
775 .trigger = imx_ssi_trigger,
776 .prepare = imx_ssi_prepare,
777 .hw_params = imx_ssi_hw_params,
778 .set_sysclk = imx_ssi_set_dai_sysclk,
779 .set_clkdiv = imx_ssi_set_dai_clkdiv,
780 .set_fmt = imx_ssi_set_dai_fmt,
781 .set_tdm_slot = imx_ssi_set_dai_tdm_slot,
782};
783
784struct snd_soc_dai imx_ssi_pcm_dai[] = {
785{
786 .name = "imx-i2s-1-0",
787 .id = IMX_DAI_SSI0,
788 .suspend = imx_ssi_suspend,
789 .resume = imx_ssi_resume,
790 .playback = {
791 .channels_min = 1,
792 .channels_max = 2,
793 .formats = IMX_SSI_BITS,
794 .rates = IMX_SSI_RATES,},
795 .capture = {
796 .channels_min = 1,
797 .channels_max = 2,
798 .formats = IMX_SSI_BITS,
799 .rates = IMX_SSI_RATES,},
800 .ops = &imx_ssi_pcm_dai_ops,
801},
802{
803 .name = "imx-i2s-2-0",
804 .id = IMX_DAI_SSI1,
805 .playback = {
806 .channels_min = 1,
807 .channels_max = 2,
808 .formats = IMX_SSI_BITS,
809 .rates = IMX_SSI_RATES,},
810 .capture = {
811 .channels_min = 1,
812 .channels_max = 2,
813 .formats = IMX_SSI_BITS,
814 .rates = IMX_SSI_RATES,},
815 .ops = &imx_ssi_pcm_dai_ops,
816},
817{
818 .name = "imx-i2s-1-1",
819 .id = IMX_DAI_SSI2,
820 .suspend = imx_ssi_suspend,
821 .resume = imx_ssi_resume,
822 .playback = {
823 .channels_min = 1,
824 .channels_max = 2,
825 .formats = IMX_SSI_BITS,
826 .rates = IMX_SSI_RATES,},
827 .capture = {
828 .channels_min = 1,
829 .channels_max = 2,
830 .formats = IMX_SSI_BITS,
831 .rates = IMX_SSI_RATES,},
832 .ops = &imx_ssi_pcm_dai_ops,
833},
834{
835 .name = "imx-i2s-2-1",
836 .id = IMX_DAI_SSI3,
837 .playback = {
838 .channels_min = 1,
839 .channels_max = 2,
840 .formats = IMX_SSI_BITS,
841 .rates = IMX_SSI_RATES,},
842 .capture = {
843 .channels_min = 1,
844 .channels_max = 2,
845 .formats = IMX_SSI_BITS,
846 .rates = IMX_SSI_RATES,},
847 .ops = &imx_ssi_pcm_dai_ops,
848},
849};
850EXPORT_SYMBOL_GPL(imx_ssi_pcm_dai);
851
852static int __init imx_ssi_init(void)
853{
854 return snd_soc_register_dais(imx_ssi_pcm_dai,
855 ARRAY_SIZE(imx_ssi_pcm_dai));
856}
857
858static void __exit imx_ssi_exit(void)
859{
860 snd_soc_unregister_dais(imx_ssi_pcm_dai,
861 ARRAY_SIZE(imx_ssi_pcm_dai));
862}
863
864module_init(imx_ssi_init);
865module_exit(imx_ssi_exit);
866MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com");
867MODULE_DESCRIPTION("i.MX ASoC I2S driver");
868MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-05 13:01:02 -0500