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ipv6: drop unused "dev" arg of icmpv6_send()
[linux-2.6/next.git] / sound / soc / imx / mxc-ssi.c
blobccdefe60e752f32bece04a58c33ecbf1d3f9f247
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
42 static int ssi_active[2] = {0, 0};
43
44 /* DMA information for mx1_mx2 platforms */
45 static 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
55 static 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
65 static 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
75 static 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
85 static 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
95 static 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
105 static 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
115 static 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
125 static struct clk *ssi_clk0, *ssi_clk1;
126
127 int 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 }
144 EXPORT_SYMBOL(get_ssi_clk);
145
146 void 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 }
159 EXPORT_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 */
165 static 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 */
212 static 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 */
273 static 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 */
315 static 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 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
401 SSI1_STCR = stcr;
402 SSI1_SRCR = srcr;
403 SSI1_SCR = scr;
404 } else {
405 SSI2_STCR = stcr;
406 SSI2_SRCR = srcr;
407 SSI2_SCR = scr;
408 }
409
410 return 0;
411 }
412
413 static int imx_ssi_startup(struct snd_pcm_substream *substream,
414 struct snd_soc_dai *dai)
415 {
416 struct snd_soc_pcm_runtime *rtd = substream->private_data;
417 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
418
419 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
420 /* set up TX DMA params */
421 switch (cpu_dai->id) {
422 case IMX_DAI_SSI0:
423 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out0;
424 break;
425 case IMX_DAI_SSI1:
426 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out1;
427 break;
428 case IMX_DAI_SSI2:
429 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out0;
430 break;
431 case IMX_DAI_SSI3:
432 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out1;
433 }
434 pr_debug("%s: (playback)\n", __func__);
435 } else {
436 /* set up RX DMA params */
437 switch (cpu_dai->id) {
438 case IMX_DAI_SSI0:
439 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in0;
440 break;
441 case IMX_DAI_SSI1:
442 cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in1;
443 break;
444 case IMX_DAI_SSI2:
445 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in0;
446 break;
447 case IMX_DAI_SSI3:
448 cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in1;
449 }
450 pr_debug("%s: (capture)\n", __func__);
451 }
452
453 /*
454 * we cant really change any SSI values after SSI is enabled
455 * need to fix in software for max flexibility - lrg
456 */
457 if (cpu_dai->active) {
458 printk(KERN_WARNING "Warning ssi already enabled\n");
459 return 0;
460 }
461
462 /* reset the SSI port - Sect 45.4.4 */
463 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
464
465 if (!ssi_clk0)
466 return -EINVAL;
467
468 if (ssi_active[SSI1_PORT]++) {
469 pr_debug("%s: exit before reset\n", __func__);
470 return 0;
471 }
472
473 /* SSI1 Reset */
474 SSI1_SCR = 0;
475
476 SSI1_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) |
477 SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) |
478 SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) |
479 SSI_SFCSR_TFWM0(TXFIFO_WATERMARK);
480 } else {
481
482 if (!ssi_clk1)
483 return -EINVAL;
484
485 if (ssi_active[SSI2_PORT]++) {
486 pr_debug("%s: exit before reset\n", __func__);
487 return 0;
488 }
489
490 /* SSI2 Reset */
491 SSI2_SCR = 0;
492
493 SSI2_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) |
494 SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) |
495 SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) |
496 SSI_SFCSR_TFWM0(TXFIFO_WATERMARK);
497 }
498
499 return 0;
500 }
501
502 int imx_ssi_hw_tx_params(struct snd_pcm_substream *substream,
503 struct snd_pcm_hw_params *params)
504 {
505 struct snd_soc_pcm_runtime *rtd = substream->private_data;
506 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
507 u32 stccr, stcr, sier;
508
509 pr_debug("%s\n", __func__);
510
511 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
512 stccr = SSI1_STCCR & ~SSI_STCCR_WL_MASK;
513 stcr = SSI1_STCR;
514 sier = SSI1_SIER;
515 } else {
516 stccr = SSI2_STCCR & ~SSI_STCCR_WL_MASK;
517 stcr = SSI2_STCR;
518 sier = SSI2_SIER;
519 }
520
521 /* DAI data (word) size */
522 switch (params_format(params)) {
523 case SNDRV_PCM_FORMAT_S16_LE:
524 stccr |= SSI_STCCR_WL(16);
525 break;
526 case SNDRV_PCM_FORMAT_S20_3LE:
527 stccr |= SSI_STCCR_WL(20);
528 break;
529 case SNDRV_PCM_FORMAT_S24_LE:
530 stccr |= SSI_STCCR_WL(24);
531 break;
532 }
533
534 /* enable interrupts */
535 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
536 stcr |= SSI_STCR_TFEN0;
537 else
538 stcr |= SSI_STCR_TFEN1;
539 sier |= SSI_SIER_TDMAE;
540
541 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
542 SSI1_STCR = stcr;
543 SSI1_STCCR = stccr;
544 SSI1_SIER = sier;
545 } else {
546 SSI2_STCR = stcr;
547 SSI2_STCCR = stccr;
548 SSI2_SIER = sier;
549 }
550
551 return 0;
552 }
553
554 int imx_ssi_hw_rx_params(struct snd_pcm_substream *substream,
555 struct snd_pcm_hw_params *params)
556 {
557 struct snd_soc_pcm_runtime *rtd = substream->private_data;
558 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
559 u32 srccr, srcr, sier;
560
561 pr_debug("%s\n", __func__);
562
563 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
564 srccr = SSI1_SRCCR & ~SSI_SRCCR_WL_MASK;
565 srcr = SSI1_SRCR;
566 sier = SSI1_SIER;
567 } else {
568 srccr = SSI2_SRCCR & ~SSI_SRCCR_WL_MASK;
569 srcr = SSI2_SRCR;
570 sier = SSI2_SIER;
571 }
572
573 /* DAI data (word) size */
574 switch (params_format(params)) {
575 case SNDRV_PCM_FORMAT_S16_LE:
576 srccr |= SSI_SRCCR_WL(16);
577 break;
578 case SNDRV_PCM_FORMAT_S20_3LE:
579 srccr |= SSI_SRCCR_WL(20);
580 break;
581 case SNDRV_PCM_FORMAT_S24_LE:
582 srccr |= SSI_SRCCR_WL(24);
583 break;
584 }
585
586 /* enable interrupts */
587 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
588 srcr |= SSI_SRCR_RFEN0;
589 else
590 srcr |= SSI_SRCR_RFEN1;
591 sier |= SSI_SIER_RDMAE;
592
593 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
594 SSI1_SRCR = srcr;
595 SSI1_SRCCR = srccr;
596 SSI1_SIER = sier;
597 } else {
598 SSI2_SRCR = srcr;
599 SSI2_SRCCR = srccr;
600 SSI2_SIER = sier;
601 }
602
603 return 0;
604 }
605
606 /*
607 * Should only be called when port is inactive (i.e. SSIEN = 0),
608 * although can be called multiple times by upper layers.
609 */
610 int imx_ssi_hw_params(struct snd_pcm_substream *substream,
611 struct snd_pcm_hw_params *params,
612 struct snd_soc_dai *dai)
613 {
614 struct snd_soc_pcm_runtime *rtd = substream->private_data;
615 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
616
617 int ret;
618
619 /* cant change any parameters when SSI is running */
620 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
621 if (SSI1_SCR & SSI_SCR_SSIEN) {
622 printk(KERN_WARNING "Warning ssi already enabled\n");
623 return 0;
624 }
625 } else {
626 if (SSI2_SCR & SSI_SCR_SSIEN) {
627 printk(KERN_WARNING "Warning ssi already enabled\n");
628 return 0;
629 }
630 }
631
632 /*
633 * Configure both tx and rx params with the same settings. This is
634 * really a harware restriction because SSI must be disabled until
635 * we can change those values. If there is an active audio stream in
636 * one direction, enabling the other direction with different
637 * settings would mean disturbing the running one.
638 */
639 ret = imx_ssi_hw_tx_params(substream, params);
640 if (ret < 0)
641 return ret;
642 return imx_ssi_hw_rx_params(substream, params);
643 }
644
645 int imx_ssi_prepare(struct snd_pcm_substream *substream,
646 struct snd_soc_dai *dai)
647 {
648 struct snd_soc_pcm_runtime *rtd = substream->private_data;
649 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
650 int ret;
651
652 pr_debug("%s\n", __func__);
653
654 /* Enable clks here to follow SSI recommended init sequence */
655 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
656 ret = clk_enable(ssi_clk0);
657 if (ret < 0)
658 printk(KERN_ERR "Unable to enable ssi_clk0\n");
659 } else {
660 ret = clk_enable(ssi_clk1);
661 if (ret < 0)
662 printk(KERN_ERR "Unable to enable ssi_clk1\n");
663 }
664
665 return 0;
666 }
667
668 static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
669 struct snd_soc_dai *dai)
670 {
671 struct snd_soc_pcm_runtime *rtd = substream->private_data;
672 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
673 u32 scr;
674
675 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
676 scr = SSI1_SCR;
677 else
678 scr = SSI2_SCR;
679
680 switch (cmd) {
681 case SNDRV_PCM_TRIGGER_START:
682 case SNDRV_PCM_TRIGGER_RESUME:
683 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
684 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
685 scr |= SSI_SCR_TE | SSI_SCR_SSIEN;
686 else
687 scr |= SSI_SCR_RE | SSI_SCR_SSIEN;
688 break;
689 case SNDRV_PCM_TRIGGER_SUSPEND:
690 case SNDRV_PCM_TRIGGER_STOP:
691 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
692 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
693 scr &= ~SSI_SCR_TE;
694 else
695 scr &= ~SSI_SCR_RE;
696 break;
697 default:
698 return -EINVAL;
699 }
700
701 if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
702 SSI1_SCR = scr;
703 else
704 SSI2_SCR = scr;
705
706 return 0;
707 }
708
709 static void imx_ssi_shutdown(struct snd_pcm_substream *substream,
710 struct snd_soc_dai *dai)
711 {
712 struct snd_soc_pcm_runtime *rtd = substream->private_data;
713 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
714
715 /* shutdown SSI if neither Tx or Rx is active */
716 if (!cpu_dai->active) {
717
718 if (cpu_dai->id == IMX_DAI_SSI0 ||
719 cpu_dai->id == IMX_DAI_SSI2) {
720
721 if (--ssi_active[SSI1_PORT] > 1)
722 return;
723
724 SSI1_SCR = 0;
725 clk_disable(ssi_clk0);
726 } else {
727 if (--ssi_active[SSI2_PORT])
728 return;
729 SSI2_SCR = 0;
730 clk_disable(ssi_clk1);
731 }
732 }
733 }
734
735 #ifdef CONFIG_PM
736 static int imx_ssi_suspend(struct platform_device *dev,
737 struct snd_soc_dai *dai)
738 {
739 return 0;
740 }
741
742 static int imx_ssi_resume(struct platform_device *pdev,
743 struct snd_soc_dai *dai)
744 {
745 return 0;
746 }
747
748 #else
749 #define imx_ssi_suspend NULL
750 #define imx_ssi_resume NULL
751 #endif
752
753 #define IMX_SSI_RATES \
754 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \
755 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
756 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
757 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
758 SNDRV_PCM_RATE_96000)
759
760 #define IMX_SSI_BITS \
761 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
762 SNDRV_PCM_FMTBIT_S24_LE)
763
764 static struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = {
765 .startup = imx_ssi_startup,
766 .shutdown = imx_ssi_shutdown,
767 .trigger = imx_ssi_trigger,
768 .prepare = imx_ssi_prepare,
769 .hw_params = imx_ssi_hw_params,
770 .set_sysclk = imx_ssi_set_dai_sysclk,
771 .set_clkdiv = imx_ssi_set_dai_clkdiv,
772 .set_fmt = imx_ssi_set_dai_fmt,
773 .set_tdm_slot = imx_ssi_set_dai_tdm_slot,
774 };
775
776 struct snd_soc_dai imx_ssi_pcm_dai[] = {
777 {
778 .name = "imx-i2s-1-0",
779 .id = IMX_DAI_SSI0,
780 .suspend = imx_ssi_suspend,
781 .resume = imx_ssi_resume,
782 .playback = {
783 .channels_min = 1,
784 .channels_max = 2,
785 .formats = IMX_SSI_BITS,
786 .rates = IMX_SSI_RATES,},
787 .capture = {
788 .channels_min = 1,
789 .channels_max = 2,
790 .formats = IMX_SSI_BITS,
791 .rates = IMX_SSI_RATES,},
792 .ops = &imx_ssi_pcm_dai_ops,
793 },
794 {
795 .name = "imx-i2s-2-0",
796 .id = IMX_DAI_SSI1,
797 .playback = {
798 .channels_min = 1,
799 .channels_max = 2,
800 .formats = IMX_SSI_BITS,
801 .rates = IMX_SSI_RATES,},
802 .capture = {
803 .channels_min = 1,
804 .channels_max = 2,
805 .formats = IMX_SSI_BITS,
806 .rates = IMX_SSI_RATES,},
807 .ops = &imx_ssi_pcm_dai_ops,
808 },
809 {
810 .name = "imx-i2s-1-1",
811 .id = IMX_DAI_SSI2,
812 .suspend = imx_ssi_suspend,
813 .resume = imx_ssi_resume,
814 .playback = {
815 .channels_min = 1,
816 .channels_max = 2,
817 .formats = IMX_SSI_BITS,
818 .rates = IMX_SSI_RATES,},
819 .capture = {
820 .channels_min = 1,
821 .channels_max = 2,
822 .formats = IMX_SSI_BITS,
823 .rates = IMX_SSI_RATES,},
824 .ops = &imx_ssi_pcm_dai_ops,
825 },
826 {
827 .name = "imx-i2s-2-1",
828 .id = IMX_DAI_SSI3,
829 .playback = {
830 .channels_min = 1,
831 .channels_max = 2,
832 .formats = IMX_SSI_BITS,
833 .rates = IMX_SSI_RATES,},
834 .capture = {
835 .channels_min = 1,
836 .channels_max = 2,
837 .formats = IMX_SSI_BITS,
838 .rates = IMX_SSI_RATES,},
839 .ops = &imx_ssi_pcm_dai_ops,
840 },
841 };
842 EXPORT_SYMBOL_GPL(imx_ssi_pcm_dai);
843
844 static int __init imx_ssi_init(void)
845 {
846 return snd_soc_register_dais(imx_ssi_pcm_dai,
847 ARRAY_SIZE(imx_ssi_pcm_dai));
848 }
849
850 static void __exit imx_ssi_exit(void)
851 {
852 snd_soc_unregister_dais(imx_ssi_pcm_dai,
853 ARRAY_SIZE(imx_ssi_pcm_dai));
854 }
855
856 module_init(imx_ssi_init);
857 module_exit(imx_ssi_exit);
858 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com");
859 MODULE_DESCRIPTION("i.MX ASoC I2S driver");
860 MODULE_LICENSE("GPL");
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