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ASoC: davinci: add missing break statement
[deliverable/linux.git] / sound / soc / samsung / i2s.c
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5033f43c 1/* sound/soc/samsung/i2s.c
1c7ac018
JB		 2 *
3 * ALSA SoC Audio Layer - Samsung I2S Controller driver
4 *
5 * Copyright (c) 2010 Samsung Electronics Co. Ltd.
6 * Jaswinder Singh <jassi.brar@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/delay.h>
14#include <linux/slab.h>
15#include <linux/clk.h>
16#include <linux/io.h>
17
1c7ac018 18#include <sound/soc.h>
0378b6ac 19#include <sound/pcm_params.h>
1c7ac018
JB		 20
21#include <plat/audio.h>
22
23#include "dma.h"
24#include "i2s.h"
172a453d 25#include "i2s-regs.h"
1c7ac018
JB		 26
27#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
28
29struct i2s_dai {
30 /* Platform device for this DAI */
31 struct platform_device *pdev;
32 /* IOREMAP'd SFRs */
33 void __iomem *addr;
34 /* Physical base address of SFRs */
35 u32 base;
36 /* Rate of RCLK source clock */
37 unsigned long rclk_srcrate;
38 /* Frame Clock */
39 unsigned frmclk;
40 /*
41 * Specifically requested RCLK,BCLK by MACHINE Driver.
42 * 0 indicates CPU driver is free to choose any value.
43 */
44 unsigned rfs, bfs;
45 /* I2S Controller's core clock */
46 struct clk *clk;
47 /* Clock for generating I2S signals */
48 struct clk *op_clk;
49 /* Array of clock names for op_clk */
50 const char **src_clk;
51 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
52 struct i2s_dai *pri_dai;
53 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
54 struct i2s_dai *sec_dai;
55#define DAI_OPENED (1 << 0) /* Dai is opened */
56#define DAI_MANAGER (1 << 1) /* Dai is the manager */
57 unsigned mode;
58 /* Driver for this DAI */
59 struct snd_soc_dai_driver i2s_dai_drv;
60 /* DMA parameters */
61 struct s3c_dma_params dma_playback;
62 struct s3c_dma_params dma_capture;
63 u32 quirks;
64 u32 suspend_i2smod;
65 u32 suspend_i2scon;
66 u32 suspend_i2spsr;
67};
68
69/* Lock for cross i/f checks */
70static DEFINE_SPINLOCK(lock);
71
72/* If this is the 'overlay' stereo DAI */
73static inline bool is_secondary(struct i2s_dai *i2s)
74{
75 return i2s->pri_dai ? true : false;
76}
77
78/* If operating in SoC-Slave mode */
79static inline bool is_slave(struct i2s_dai *i2s)
80{
81 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
82}
83
84/* If this interface of the controller is transmitting data */
85static inline bool tx_active(struct i2s_dai *i2s)
86{
87 u32 active;
88
89 if (!i2s)
90 return false;
91
33195500 92 active = readl(i2s->addr + I2SCON);
1c7ac018
JB		 93
94 if (is_secondary(i2s))
95 active &= CON_TXSDMA_ACTIVE;
96 else
97 active &= CON_TXDMA_ACTIVE;
98
99 return active ? true : false;
100}
101
102/* If the other interface of the controller is transmitting data */
103static inline bool other_tx_active(struct i2s_dai *i2s)
104{
105 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
106
107 return tx_active(other);
108}
109
110/* If any interface of the controller is transmitting data */
111static inline bool any_tx_active(struct i2s_dai *i2s)
112{
113 return tx_active(i2s) || other_tx_active(i2s);
114}
115
116/* If this interface of the controller is receiving data */
117static inline bool rx_active(struct i2s_dai *i2s)
118{
119 u32 active;
120
121 if (!i2s)
122 return false;
123
33195500 124 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
1c7ac018
JB		 125
126 return active ? true : false;
127}
128
129/* If the other interface of the controller is receiving data */
130static inline bool other_rx_active(struct i2s_dai *i2s)
131{
132 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
133
134 return rx_active(other);
135}
136
137/* If any interface of the controller is receiving data */
138static inline bool any_rx_active(struct i2s_dai *i2s)
139{
140 return rx_active(i2s) || other_rx_active(i2s);
141}
142
143/* If the other DAI is transmitting or receiving data */
144static inline bool other_active(struct i2s_dai *i2s)
145{
146 return other_rx_active(i2s) || other_tx_active(i2s);
147}
148
149/* If this DAI is transmitting or receiving data */
150static inline bool this_active(struct i2s_dai *i2s)
151{
152 return tx_active(i2s) || rx_active(i2s);
153}
154
155/* If the controller is active anyway */
156static inline bool any_active(struct i2s_dai *i2s)
157{
158 return this_active(i2s) || other_active(i2s);
159}
160
161static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
162{
163 return snd_soc_dai_get_drvdata(dai);
164}
165
166static inline bool is_opened(struct i2s_dai *i2s)
167{
168 if (i2s && (i2s->mode & DAI_OPENED))
169 return true;
170 else
171 return false;
172}
173
174static inline bool is_manager(struct i2s_dai *i2s)
175{
176 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
177 return true;
178 else
179 return false;
180}
181
182/* Read RCLK of I2S (in multiples of LRCLK) */
183static inline unsigned get_rfs(struct i2s_dai *i2s)
184{
185 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
186
187 switch (rfs) {
188 case 3: return 768;
189 case 2: return 384;
190 case 1: return 512;
191 default: return 256;
192 }
193}
194
195/* Write RCLK of I2S (in multiples of LRCLK) */
196static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
197{
198 u32 mod = readl(i2s->addr + I2SMOD);
199
200 mod &= ~MOD_RCLK_MASK;
201
202 switch (rfs) {
203 case 768:
204 mod |= MOD_RCLK_768FS;
205 break;
206 case 512:
207 mod |= MOD_RCLK_512FS;
208 break;
209 case 384:
210 mod |= MOD_RCLK_384FS;
211 break;
212 default:
213 mod |= MOD_RCLK_256FS;
214 break;
215 }
216
217 writel(mod, i2s->addr + I2SMOD);
218}
219
220/* Read Bit-Clock of I2S (in multiples of LRCLK) */
221static inline unsigned get_bfs(struct i2s_dai *i2s)
222{
223 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
224
225 switch (bfs) {
226 case 3: return 24;
227 case 2: return 16;
228 case 1: return 48;
229 default: return 32;
230 }
231}
232
233/* Write Bit-Clock of I2S (in multiples of LRCLK) */
234static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
235{
236 u32 mod = readl(i2s->addr + I2SMOD);
237
238 mod &= ~MOD_BCLK_MASK;
239
240 switch (bfs) {
241 case 48:
242 mod |= MOD_BCLK_48FS;
243 break;
244 case 32:
245 mod |= MOD_BCLK_32FS;
246 break;
247 case 24:
248 mod |= MOD_BCLK_24FS;
249 break;
250 case 16:
251 mod |= MOD_BCLK_16FS;
252 break;
253 default:
254 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
255 return;
256 }
257
258 writel(mod, i2s->addr + I2SMOD);
259}
260
261/* Sample-Size */
262static inline int get_blc(struct i2s_dai *i2s)
263{
264 int blc = readl(i2s->addr + I2SMOD);
265
266 blc = (blc >> 13) & 0x3;
267
268 switch (blc) {
269 case 2: return 24;
270 case 1: return 8;
271 default: return 16;
272 }
273}
274
275/* TX Channel Control */
276static void i2s_txctrl(struct i2s_dai *i2s, int on)
277{
278 void __iomem *addr = i2s->addr;
279 u32 con = readl(addr + I2SCON);
280 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
281
282 if (on) {
283 con |= CON_ACTIVE;
284 con &= ~CON_TXCH_PAUSE;
285
286 if (is_secondary(i2s)) {
287 con |= CON_TXSDMA_ACTIVE;
288 con &= ~CON_TXSDMA_PAUSE;
289 } else {
290 con |= CON_TXDMA_ACTIVE;
291 con &= ~CON_TXDMA_PAUSE;
292 }
293
294 if (any_rx_active(i2s))
295 mod |= MOD_TXRX;
296 else
297 mod |= MOD_TXONLY;
298 } else {
299 if (is_secondary(i2s)) {
300 con |= CON_TXSDMA_PAUSE;
301 con &= ~CON_TXSDMA_ACTIVE;
302 } else {
303 con |= CON_TXDMA_PAUSE;
304 con &= ~CON_TXDMA_ACTIVE;
305 }
306
307 if (other_tx_active(i2s)) {
308 writel(con, addr + I2SCON);
309 return;
310 }
311
312 con |= CON_TXCH_PAUSE;
313
314 if (any_rx_active(i2s))
315 mod |= MOD_RXONLY;
316 else
317 con &= ~CON_ACTIVE;
318 }
319
320 writel(mod, addr + I2SMOD);
321 writel(con, addr + I2SCON);
322}
323
324/* RX Channel Control */
325static void i2s_rxctrl(struct i2s_dai *i2s, int on)
326{
327 void __iomem *addr = i2s->addr;
328 u32 con = readl(addr + I2SCON);
329 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
330
331 if (on) {
332 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
333 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
334
335 if (any_tx_active(i2s))
336 mod |= MOD_TXRX;
337 else
338 mod |= MOD_RXONLY;
339 } else {
340 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
341 con &= ~CON_RXDMA_ACTIVE;
342
343 if (any_tx_active(i2s))
344 mod |= MOD_TXONLY;
345 else
346 con &= ~CON_ACTIVE;
347 }
348
349 writel(mod, addr + I2SMOD);
350 writel(con, addr + I2SCON);
351}
352
353/* Flush FIFO of an interface */
354static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
355{
356 void __iomem *fic;
357 u32 val;
358
359 if (!i2s)
360 return;
361
362 if (is_secondary(i2s))
363 fic = i2s->addr + I2SFICS;
364 else
365 fic = i2s->addr + I2SFIC;
366
367 /* Flush the FIFO */
368 writel(readl(fic) | flush, fic);
369
370 /* Be patient */
371 val = msecs_to_loops(1) / 1000; /* 1 usec */
372 while (--val)
373 cpu_relax();
374
375 writel(readl(fic) & ~flush, fic);
376}
377
378static int i2s_set_sysclk(struct snd_soc_dai *dai,
379 int clk_id, unsigned int rfs, int dir)
380{
381 struct i2s_dai *i2s = to_info(dai);
382 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
383 u32 mod = readl(i2s->addr + I2SMOD);
384
385 switch (clk_id) {
386 case SAMSUNG_I2S_CDCLK:
387 /* Shouldn't matter in GATING(CLOCK_IN) mode */
388 if (dir == SND_SOC_CLOCK_IN)
389 rfs = 0;
390
391 if ((rfs && other->rfs && (other->rfs != rfs)) ||
392 (any_active(i2s) &&
393 (((dir == SND_SOC_CLOCK_IN)
394 && !(mod & MOD_CDCLKCON)) ||
395 ((dir == SND_SOC_CLOCK_OUT)
396 && (mod & MOD_CDCLKCON))))) {
397 dev_err(&i2s->pdev->dev,
398 "%s:%d Other DAI busy\n", __func__, __LINE__);
399 return -EAGAIN;
400 }
401
402 if (dir == SND_SOC_CLOCK_IN)
403 mod |= MOD_CDCLKCON;
404 else
405 mod &= ~MOD_CDCLKCON;
406
407 i2s->rfs = rfs;
408 break;
409
410 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
411 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
412 if ((i2s->quirks & QUIRK_NO_MUXPSR)
413 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
414 clk_id = 0;
415 else
416 clk_id = 1;
417
418 if (!any_active(i2s)) {
419 if (i2s->op_clk) {
420 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
421 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
422 clk_disable(i2s->op_clk);
423 clk_put(i2s->op_clk);
424 } else {
6ce534aa
JB		 425 i2s->rclk_srcrate =
426 clk_get_rate(i2s->op_clk);
1c7ac018
JB		 427 return 0;
428 }
429 }
430
431 i2s->op_clk = clk_get(&i2s->pdev->dev,
432 i2s->src_clk[clk_id]);
433 clk_enable(i2s->op_clk);
434 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
435
436 /* Over-ride the other's */
437 if (other) {
438 other->op_clk = i2s->op_clk;
439 other->rclk_srcrate = i2s->rclk_srcrate;
440 }
441 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
442 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
443 dev_err(&i2s->pdev->dev,
444 "%s:%d Other DAI busy\n", __func__, __LINE__);
445 return -EAGAIN;
446 } else {
447 /* Call can't be on the active DAI */
448 i2s->op_clk = other->op_clk;
449 i2s->rclk_srcrate = other->rclk_srcrate;
450 return 0;
451 }
452
453 if (clk_id == 0)
454 mod &= ~MOD_IMS_SYSMUX;
455 else
456 mod |= MOD_IMS_SYSMUX;
457 break;
458
459 default:
460 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
461 return -EINVAL;
462 }
463
464 writel(mod, i2s->addr + I2SMOD);
465
466 return 0;
467}
468
469static int i2s_set_fmt(struct snd_soc_dai *dai,
470 unsigned int fmt)
471{
472 struct i2s_dai *i2s = to_info(dai);
473 u32 mod = readl(i2s->addr + I2SMOD);
474 u32 tmp = 0;
475
476 /* Format is priority */
477 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
478 case SND_SOC_DAIFMT_RIGHT_J:
479 tmp |= MOD_LR_RLOW;
480 tmp |= MOD_SDF_MSB;
481 break;
482 case SND_SOC_DAIFMT_LEFT_J:
483 tmp |= MOD_LR_RLOW;
484 tmp |= MOD_SDF_LSB;
485 break;
486 case SND_SOC_DAIFMT_I2S:
487 tmp |= MOD_SDF_IIS;
488 break;
489 default:
490 dev_err(&i2s->pdev->dev, "Format not supported\n");
491 return -EINVAL;
492 }
493
494 /*
495 * INV flag is relative to the FORMAT flag - if set it simply
496 * flips the polarity specified by the Standard
497 */
498 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
499 case SND_SOC_DAIFMT_NB_NF:
500 break;
501 case SND_SOC_DAIFMT_NB_IF:
502 if (tmp & MOD_LR_RLOW)
503 tmp &= ~MOD_LR_RLOW;
504 else
505 tmp |= MOD_LR_RLOW;
506 break;
507 default:
508 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
509 return -EINVAL;
510 }
511
512 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
513 case SND_SOC_DAIFMT_CBM_CFM:
514 tmp |= MOD_SLAVE;
515 break;
516 case SND_SOC_DAIFMT_CBS_CFS:
517 /* Set default source clock in Master mode */
518 if (i2s->rclk_srcrate == 0)
519 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
520 0, SND_SOC_CLOCK_IN);
521 break;
522 default:
523 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
524 return -EINVAL;
525 }
526
527 if (any_active(i2s) &&
528 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
529 | MOD_SLAVE)) != tmp)) {
530 dev_err(&i2s->pdev->dev,
531 "%s:%d Other DAI busy\n", __func__, __LINE__);
532 return -EAGAIN;
533 }
534
535 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
536 mod |= tmp;
537 writel(mod, i2s->addr + I2SMOD);
538
539 return 0;
540}
541
542static int i2s_hw_params(struct snd_pcm_substream *substream,
543 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
544{
545 struct i2s_dai *i2s = to_info(dai);
546 u32 mod = readl(i2s->addr + I2SMOD);
547
548 if (!is_secondary(i2s))
549 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
550
551 switch (params_channels(params)) {
552 case 6:
553 mod |= MOD_DC2_EN;
554 case 4:
555 mod |= MOD_DC1_EN;
556 break;
557 case 2:
558 break;
559 default:
560 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
561 params_channels(params));
562 return -EINVAL;
563 }
564
565 if (is_secondary(i2s))
566 mod &= ~MOD_BLCS_MASK;
567 else
568 mod &= ~MOD_BLCP_MASK;
569
570 if (is_manager(i2s))
571 mod &= ~MOD_BLC_MASK;
572
573 switch (params_format(params)) {
574 case SNDRV_PCM_FORMAT_S8:
575 if (is_secondary(i2s))
576 mod |= MOD_BLCS_8BIT;
577 else
578 mod |= MOD_BLCP_8BIT;
579 if (is_manager(i2s))
580 mod |= MOD_BLC_8BIT;
581 break;
582 case SNDRV_PCM_FORMAT_S16_LE:
583 if (is_secondary(i2s))
584 mod |= MOD_BLCS_16BIT;
585 else
586 mod |= MOD_BLCP_16BIT;
587 if (is_manager(i2s))
588 mod |= MOD_BLC_16BIT;
589 break;
590 case SNDRV_PCM_FORMAT_S24_LE:
591 if (is_secondary(i2s))
592 mod |= MOD_BLCS_24BIT;
593 else
594 mod |= MOD_BLCP_24BIT;
595 if (is_manager(i2s))
596 mod |= MOD_BLC_24BIT;
597 break;
598 default:
599 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
600 params_format(params));
601 return -EINVAL;
602 }
603 writel(mod, i2s->addr + I2SMOD);
604
605 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
606 snd_soc_dai_set_dma_data(dai, substream,
607 (void *)&i2s->dma_playback);
608 else
609 snd_soc_dai_set_dma_data(dai, substream,
610 (void *)&i2s->dma_capture);
611
612 i2s->frmclk = params_rate(params);
613
614 return 0;
615}
616
617/* We set constraints on the substream acc to the version of I2S */
618static int i2s_startup(struct snd_pcm_substream *substream,
619 struct snd_soc_dai *dai)
620{
621 struct i2s_dai *i2s = to_info(dai);
622 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
623 unsigned long flags;
624
625 spin_lock_irqsave(&lock, flags);
626
627 i2s->mode |= DAI_OPENED;
628
629 if (is_manager(other))
630 i2s->mode &= ~DAI_MANAGER;
631 else
632 i2s->mode |= DAI_MANAGER;
633
634 /* Enforce set_sysclk in Master mode */
635 i2s->rclk_srcrate = 0;
636
637 spin_unlock_irqrestore(&lock, flags);
638
639 return 0;
640}
641
642static void i2s_shutdown(struct snd_pcm_substream *substream,
643 struct snd_soc_dai *dai)
644{
645 struct i2s_dai *i2s = to_info(dai);
646 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
647 unsigned long flags;
648
649 spin_lock_irqsave(&lock, flags);
650
651 i2s->mode &= ~DAI_OPENED;
652 i2s->mode &= ~DAI_MANAGER;
653
654 if (is_opened(other))
655 other->mode |= DAI_MANAGER;
656
657 /* Reset any constraint on RFS and BFS */
658 i2s->rfs = 0;
659 i2s->bfs = 0;
660
661 spin_unlock_irqrestore(&lock, flags);
662
663 /* Gate CDCLK by default */
664 if (!is_opened(other))
665 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
666 0, SND_SOC_CLOCK_IN);
667}
668
669static int config_setup(struct i2s_dai *i2s)
670{
671 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
672 unsigned rfs, bfs, blc;
673 u32 psr;
674
675 blc = get_blc(i2s);
676
677 bfs = i2s->bfs;
678
679 if (!bfs && other)
680 bfs = other->bfs;
681
682 /* Select least possible multiple(2) if no constraint set */
683 if (!bfs)
684 bfs = blc * 2;
685
686 rfs = i2s->rfs;
687
688 if (!rfs && other)
689 rfs = other->rfs;
690
691 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
692 dev_err(&i2s->pdev->dev,
693 "%d-RFS not supported for 24-blc\n", rfs);
694 return -EINVAL;
695 }
696
697 if (!rfs) {
698 if (bfs == 16 || bfs == 32)
699 rfs = 256;
700 else
701 rfs = 384;
702 }
703
704 /* If already setup and running */
705 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
706 dev_err(&i2s->pdev->dev,
707 "%s:%d Other DAI busy\n", __func__, __LINE__);
708 return -EAGAIN;
709 }
710
711 /* Don't bother RFS, BFS & PSR in Slave mode */
712 if (is_slave(i2s))
713 return 0;
714
715 set_bfs(i2s, bfs);
716 set_rfs(i2s, rfs);
717
718 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
719 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
720 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
721 dev_dbg(&i2s->pdev->dev,
722 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
723 i2s->rclk_srcrate, psr, rfs, bfs);
724 }
725
726 return 0;
727}
728
729static int i2s_trigger(struct snd_pcm_substream *substream,
730 int cmd, struct snd_soc_dai *dai)
731{
732 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
733 struct snd_soc_pcm_runtime *rtd = substream->private_data;
734 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
735 unsigned long flags;
736
737 switch (cmd) {
738 case SNDRV_PCM_TRIGGER_START:
739 case SNDRV_PCM_TRIGGER_RESUME:
740 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
741 local_irq_save(flags);
742
1c7ac018
JB		 743 if (config_setup(i2s)) {
744 local_irq_restore(flags);
745 return -EINVAL;
746 }
747
748 if (capture)
749 i2s_rxctrl(i2s, 1);
750 else
751 i2s_txctrl(i2s, 1);
752
753 local_irq_restore(flags);
754 break;
755 case SNDRV_PCM_TRIGGER_STOP:
756 case SNDRV_PCM_TRIGGER_SUSPEND:
757 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
758 local_irq_save(flags);
759
760 if (capture)
761 i2s_rxctrl(i2s, 0);
762 else
763 i2s_txctrl(i2s, 0);
764
775bc971
JB		 765 if (capture)
766 i2s_fifo(i2s, FIC_RXFLUSH);
767 else
768 i2s_fifo(i2s, FIC_TXFLUSH);
769
1c7ac018
JB		 770 local_irq_restore(flags);
771 break;
772 }
773
774 return 0;
775}
776
777static int i2s_set_clkdiv(struct snd_soc_dai *dai,
778 int div_id, int div)
779{
780 struct i2s_dai *i2s = to_info(dai);
781 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
782
783 switch (div_id) {
784 case SAMSUNG_I2S_DIV_BCLK:
785 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
786 || (other && other->bfs && (other->bfs != div))) {
787 dev_err(&i2s->pdev->dev,
788 "%s:%d Other DAI busy\n", __func__, __LINE__);
789 return -EAGAIN;
790 }
791 i2s->bfs = div;
792 break;
793 default:
794 dev_err(&i2s->pdev->dev,
795 "Invalid clock divider(%d)\n", div_id);
796 return -EINVAL;
797 }
798
799 return 0;
800}
801
802static snd_pcm_sframes_t
803i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
804{
805 struct i2s_dai *i2s = to_info(dai);
806 u32 reg = readl(i2s->addr + I2SFIC);
807 snd_pcm_sframes_t delay;
808
809 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
810 delay = FIC_RXCOUNT(reg);
811 else if (is_secondary(i2s))
812 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
813 else
814 delay = FIC_TXCOUNT(reg);
815
816 return delay;
817}
818
819#ifdef CONFIG_PM
820static int i2s_suspend(struct snd_soc_dai *dai)
821{
822 struct i2s_dai *i2s = to_info(dai);
823
824 if (dai->active) {
825 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
826 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
827 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
828 }
829
830 return 0;
831}
832
833static int i2s_resume(struct snd_soc_dai *dai)
834{
835 struct i2s_dai *i2s = to_info(dai);
836
837 if (dai->active) {
838 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
839 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
840 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
841 }
842
843 return 0;
844}
845#else
846#define i2s_suspend NULL
847#define i2s_resume NULL
848#endif
849
850static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
851{
852 struct i2s_dai *i2s = to_info(dai);
853 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
854
855 if (other && other->clk) /* If this is probe on secondary */
856 goto probe_exit;
857
858 i2s->addr = ioremap(i2s->base, 0x100);
859 if (i2s->addr == NULL) {
860 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
861 return -ENXIO;
862 }
863
864 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
865 if (IS_ERR(i2s->clk)) {
866 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
867 iounmap(i2s->addr);
868 return -ENOENT;
869 }
870 clk_enable(i2s->clk);
871
872 if (other) {
873 other->addr = i2s->addr;
874 other->clk = i2s->clk;
875 }
876
877 if (i2s->quirks & QUIRK_NEED_RSTCLR)
878 writel(CON_RSTCLR, i2s->addr + I2SCON);
879
880probe_exit:
881 /* Reset any constraint on RFS and BFS */
882 i2s->rfs = 0;
883 i2s->bfs = 0;
884 i2s_txctrl(i2s, 0);
885 i2s_rxctrl(i2s, 0);
886 i2s_fifo(i2s, FIC_TXFLUSH);
887 i2s_fifo(other, FIC_TXFLUSH);
888 i2s_fifo(i2s, FIC_RXFLUSH);
889
890 /* Gate CDCLK by default */
891 if (!is_opened(other))
892 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
893 0, SND_SOC_CLOCK_IN);
894
895 return 0;
896}
897
898static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
899{
900 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
901 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
902
903 if (!other || !other->clk) {
904
905 if (i2s->quirks & QUIRK_NEED_RSTCLR)
906 writel(0, i2s->addr + I2SCON);
907
908 clk_disable(i2s->clk);
909 clk_put(i2s->clk);
910
911 iounmap(i2s->addr);
912 }
913
914 i2s->clk = NULL;
915
916 return 0;
917}
918
919static struct snd_soc_dai_ops samsung_i2s_dai_ops = {
920 .trigger = i2s_trigger,
921 .hw_params = i2s_hw_params,
922 .set_fmt = i2s_set_fmt,
923 .set_clkdiv = i2s_set_clkdiv,
924 .set_sysclk = i2s_set_sysclk,
925 .startup = i2s_startup,
926 .shutdown = i2s_shutdown,
927 .delay = i2s_delay,
928};
929
930#define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
931
932#define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
933 SNDRV_PCM_FMTBIT_S16_LE | \
934 SNDRV_PCM_FMTBIT_S24_LE)
935
936static __devinit
937struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
938{
939 struct i2s_dai *i2s;
940
941 i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL);
942 if (i2s == NULL)
943 return NULL;
944
945 i2s->pdev = pdev;
946 i2s->pri_dai = NULL;
947 i2s->sec_dai = NULL;
948 i2s->i2s_dai_drv.symmetric_rates = 1;
949 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
950 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
951 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
952 i2s->i2s_dai_drv.suspend = i2s_suspend;
953 i2s->i2s_dai_drv.resume = i2s_resume;
954 i2s->i2s_dai_drv.playback.channels_min = 2;
955 i2s->i2s_dai_drv.playback.channels_max = 2;
956 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
957 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
958
959 if (!sec) {
960 i2s->i2s_dai_drv.capture.channels_min = 2;
961 i2s->i2s_dai_drv.capture.channels_max = 2;
962 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
963 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
964 } else { /* Create a new platform_device for Secondary */
965 i2s->pdev = platform_device_register_resndata(NULL,
966 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
967 NULL, 0, NULL, 0);
968 if (IS_ERR(i2s->pdev)) {
969 kfree(i2s);
970 return NULL;
971 }
972 }
973
974 /* Pre-assign snd_soc_dai_set_drvdata */
975 dev_set_drvdata(&i2s->pdev->dev, i2s);
976
977 return i2s;
978}
979
980static __devinit int samsung_i2s_probe(struct platform_device *pdev)
981{
982 u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
983 struct i2s_dai *pri_dai, *sec_dai = NULL;
984 struct s3c_audio_pdata *i2s_pdata;
985 struct samsung_i2s *i2s_cfg;
986 struct resource *res;
987 u32 regs_base, quirks;
988 int ret = 0;
989
990 /* Call during Seconday interface registration */
991 if (pdev->id >= SAMSUNG_I2S_SECOFF) {
992 sec_dai = dev_get_drvdata(&pdev->dev);
993 snd_soc_register_dai(&sec_dai->pdev->dev,
994 &sec_dai->i2s_dai_drv);
995 return 0;
996 }
997
998 i2s_pdata = pdev->dev.platform_data;
999 if (i2s_pdata == NULL) {
1000 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1001 return -EINVAL;
1002 }
1003
1004 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1005 if (!res) {
1006 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
1007 return -ENXIO;
1008 }
1009 dma_pl_chan = res->start;
1010
1011 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1012 if (!res) {
1013 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
1014 return -ENXIO;
1015 }
1016 dma_cp_chan = res->start;
1017
1018 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1019 if (res)
1020 dma_pl_sec_chan = res->start;
1021 else
1022 dma_pl_sec_chan = 0;
1023
1024 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1025 if (!res) {
1026 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1027 return -ENXIO;
1028 }
1029
1030 if (!request_mem_region(res->start, resource_size(res),
1031 "samsung-i2s")) {
1032 dev_err(&pdev->dev, "Unable to request SFR region\n");
1033 return -EBUSY;
1034 }
1035 regs_base = res->start;
1036
1037 i2s_cfg = &i2s_pdata->type.i2s;
1038 quirks = i2s_cfg->quirks;
1039
1040 pri_dai = i2s_alloc_dai(pdev, false);
1041 if (!pri_dai) {
1042 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1043 ret = -ENOMEM;
1044 goto err1;
1045 }
1046
1047 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1048 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1049 pri_dai->dma_playback.client =
1050 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1051 pri_dai->dma_capture.client =
1052 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1053 pri_dai->dma_playback.channel = dma_pl_chan;
1054 pri_dai->dma_capture.channel = dma_cp_chan;
1055 pri_dai->src_clk = i2s_cfg->src_clk;
1056 pri_dai->dma_playback.dma_size = 4;
1057 pri_dai->dma_capture.dma_size = 4;
1058 pri_dai->base = regs_base;
1059 pri_dai->quirks = quirks;
1060
1061 if (quirks & QUIRK_PRI_6CHAN)
1062 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1063
1064 if (quirks & QUIRK_SEC_DAI) {
1065 sec_dai = i2s_alloc_dai(pdev, true);
1066 if (!sec_dai) {
1067 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1068 ret = -ENOMEM;
1069 goto err2;
1070 }
1071 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1072 sec_dai->dma_playback.client =
1073 (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1074 /* Use iDMA always if SysDMA not provided */
1075 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
1076 sec_dai->src_clk = i2s_cfg->src_clk;
1077 sec_dai->dma_playback.dma_size = 4;
1078 sec_dai->base = regs_base;
1079 sec_dai->quirks = quirks;
1080 sec_dai->pri_dai = pri_dai;
1081 pri_dai->sec_dai = sec_dai;
1082 }
1083
1084 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1085 dev_err(&pdev->dev, "Unable to configure gpio\n");
1086 ret = -EINVAL;
1087 goto err3;
1088 }
1089
1090 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
1091
1092 return 0;
1093err3:
1094 kfree(sec_dai);
1095err2:
1096 kfree(pri_dai);
1097err1:
1098 release_mem_region(regs_base, resource_size(res));
1099
1100 return ret;
1101}
1102
1103static __devexit int samsung_i2s_remove(struct platform_device *pdev)
1104{
1105 struct i2s_dai *i2s, *other;
1106
1107 i2s = dev_get_drvdata(&pdev->dev);
1108 other = i2s->pri_dai ? : i2s->sec_dai;
1109
1110 if (other) {
1111 other->pri_dai = NULL;
1112 other->sec_dai = NULL;
1113 } else {
1114 struct resource *res;
1115 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1116 if (res)
1117 release_mem_region(res->start, resource_size(res));
1118 }
1119
1120 i2s->pri_dai = NULL;
1121 i2s->sec_dai = NULL;
1122
1123 kfree(i2s);
1124
1125 snd_soc_unregister_dai(&pdev->dev);
1126
1127 return 0;
1128}
1129
1130static struct platform_driver samsung_i2s_driver = {
1131 .probe = samsung_i2s_probe,
1132 .remove = samsung_i2s_remove,
1133 .driver = {
1134 .name = "samsung-i2s",
1135 .owner = THIS_MODULE,
1136 },
1137};
1138
1139static int __init samsung_i2s_init(void)
1140{
1141 return platform_driver_register(&samsung_i2s_driver);
1142}
1143module_init(samsung_i2s_init);
1144
1145static void __exit samsung_i2s_exit(void)
1146{
1147 platform_driver_unregister(&samsung_i2s_driver);
1148}
1149module_exit(samsung_i2s_exit);
1150
1151/* Module information */
1152MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
1153MODULE_DESCRIPTION("Samsung I2S Interface");
1154MODULE_ALIAS("platform:samsung-i2s");
1155MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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