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Merge remote-tracking branch 'net/master'
[linux-2.6/next.git] / sound / soc / samsung / i2s.c
blobc086b78539ee5075f14b76d99089e4abb7f0abf1
1 /* sound/soc/samsung/i2s.c
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
18 #include <sound/soc.h>
19 #include <sound/pcm_params.h>
20
21 #include <plat/audio.h>
22
23 #include "dma.h"
24 #include "idma.h"
25 #include "i2s.h"
26 #include "i2s-regs.h"
27
28 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
29
30 struct i2s_dai {
31 /* Platform device for this DAI */
32 struct platform_device *pdev;
33 /* IOREMAP'd SFRs */
34 void __iomem *addr;
35 /* Physical base address of SFRs */
36 u32 base;
37 /* Rate of RCLK source clock */
38 unsigned long rclk_srcrate;
39 /* Frame Clock */
40 unsigned frmclk;
41 /*
42 * Specifically requested RCLK,BCLK by MACHINE Driver.
43 * 0 indicates CPU driver is free to choose any value.
44 */
45 unsigned rfs, bfs;
46 /* I2S Controller's core clock */
47 struct clk *clk;
48 /* Clock for generating I2S signals */
49 struct clk *op_clk;
50 /* Array of clock names for op_clk */
51 const char **src_clk;
52 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
53 struct i2s_dai *pri_dai;
54 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
55 struct i2s_dai *sec_dai;
56 #define DAI_OPENED (1 << 0) /* Dai is opened */
57 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
58 unsigned mode;
59 /* Driver for this DAI */
60 struct snd_soc_dai_driver i2s_dai_drv;
61 /* DMA parameters */
62 struct s3c_dma_params dma_playback;
63 struct s3c_dma_params dma_capture;
64 struct s3c_dma_params idma_playback;
65 u32 quirks;
66 u32 suspend_i2smod;
67 u32 suspend_i2scon;
68 u32 suspend_i2spsr;
69 };
70
71 /* Lock for cross i/f checks */
72 static DEFINE_SPINLOCK(lock);
73
74 /* If this is the 'overlay' stereo DAI */
75 static inline bool is_secondary(struct i2s_dai *i2s)
76 {
77 return i2s->pri_dai ? true : false;
78 }
79
80 /* If operating in SoC-Slave mode */
81 static inline bool is_slave(struct i2s_dai *i2s)
82 {
83 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
84 }
85
86 /* If this interface of the controller is transmitting data */
87 static inline bool tx_active(struct i2s_dai *i2s)
88 {
89 u32 active;
90
91 if (!i2s)
92 return false;
93
94 active = readl(i2s->addr + I2SCON);
95
96 if (is_secondary(i2s))
97 active &= CON_TXSDMA_ACTIVE;
98 else
99 active &= CON_TXDMA_ACTIVE;
100
101 return active ? true : false;
102 }
103
104 /* If the other interface of the controller is transmitting data */
105 static inline bool other_tx_active(struct i2s_dai *i2s)
106 {
107 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
108
109 return tx_active(other);
110 }
111
112 /* If any interface of the controller is transmitting data */
113 static inline bool any_tx_active(struct i2s_dai *i2s)
114 {
115 return tx_active(i2s) || other_tx_active(i2s);
116 }
117
118 /* If this interface of the controller is receiving data */
119 static inline bool rx_active(struct i2s_dai *i2s)
120 {
121 u32 active;
122
123 if (!i2s)
124 return false;
125
126 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
127
128 return active ? true : false;
129 }
130
131 /* If the other interface of the controller is receiving data */
132 static inline bool other_rx_active(struct i2s_dai *i2s)
133 {
134 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
135
136 return rx_active(other);
137 }
138
139 /* If any interface of the controller is receiving data */
140 static inline bool any_rx_active(struct i2s_dai *i2s)
141 {
142 return rx_active(i2s) || other_rx_active(i2s);
143 }
144
145 /* If the other DAI is transmitting or receiving data */
146 static inline bool other_active(struct i2s_dai *i2s)
147 {
148 return other_rx_active(i2s) || other_tx_active(i2s);
149 }
150
151 /* If this DAI is transmitting or receiving data */
152 static inline bool this_active(struct i2s_dai *i2s)
153 {
154 return tx_active(i2s) || rx_active(i2s);
155 }
156
157 /* If the controller is active anyway */
158 static inline bool any_active(struct i2s_dai *i2s)
159 {
160 return this_active(i2s) || other_active(i2s);
161 }
162
163 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
164 {
165 return snd_soc_dai_get_drvdata(dai);
166 }
167
168 static inline bool is_opened(struct i2s_dai *i2s)
169 {
170 if (i2s && (i2s->mode & DAI_OPENED))
171 return true;
172 else
173 return false;
174 }
175
176 static inline bool is_manager(struct i2s_dai *i2s)
177 {
178 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
179 return true;
180 else
181 return false;
182 }
183
184 /* Read RCLK of I2S (in multiples of LRCLK) */
185 static inline unsigned get_rfs(struct i2s_dai *i2s)
186 {
187 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
188
189 switch (rfs) {
190 case 3: return 768;
191 case 2: return 384;
192 case 1: return 512;
193 default: return 256;
194 }
195 }
196
197 /* Write RCLK of I2S (in multiples of LRCLK) */
198 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
199 {
200 u32 mod = readl(i2s->addr + I2SMOD);
201
202 mod &= ~MOD_RCLK_MASK;
203
204 switch (rfs) {
205 case 768:
206 mod |= MOD_RCLK_768FS;
207 break;
208 case 512:
209 mod |= MOD_RCLK_512FS;
210 break;
211 case 384:
212 mod |= MOD_RCLK_384FS;
213 break;
214 default:
215 mod |= MOD_RCLK_256FS;
216 break;
217 }
218
219 writel(mod, i2s->addr + I2SMOD);
220 }
221
222 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
223 static inline unsigned get_bfs(struct i2s_dai *i2s)
224 {
225 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
226
227 switch (bfs) {
228 case 3: return 24;
229 case 2: return 16;
230 case 1: return 48;
231 default: return 32;
232 }
233 }
234
235 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
236 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
237 {
238 u32 mod = readl(i2s->addr + I2SMOD);
239
240 mod &= ~MOD_BCLK_MASK;
241
242 switch (bfs) {
243 case 48:
244 mod |= MOD_BCLK_48FS;
245 break;
246 case 32:
247 mod |= MOD_BCLK_32FS;
248 break;
249 case 24:
250 mod |= MOD_BCLK_24FS;
251 break;
252 case 16:
253 mod |= MOD_BCLK_16FS;
254 break;
255 default:
256 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
257 return;
258 }
259
260 writel(mod, i2s->addr + I2SMOD);
261 }
262
263 /* Sample-Size */
264 static inline int get_blc(struct i2s_dai *i2s)
265 {
266 int blc = readl(i2s->addr + I2SMOD);
267
268 blc = (blc >> 13) & 0x3;
269
270 switch (blc) {
271 case 2: return 24;
272 case 1: return 8;
273 default: return 16;
274 }
275 }
276
277 /* TX Channel Control */
278 static void i2s_txctrl(struct i2s_dai *i2s, int on)
279 {
280 void __iomem *addr = i2s->addr;
281 u32 con = readl(addr + I2SCON);
282 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
283
284 if (on) {
285 con |= CON_ACTIVE;
286 con &= ~CON_TXCH_PAUSE;
287
288 if (is_secondary(i2s)) {
289 con |= CON_TXSDMA_ACTIVE;
290 con &= ~CON_TXSDMA_PAUSE;
291 } else {
292 con |= CON_TXDMA_ACTIVE;
293 con &= ~CON_TXDMA_PAUSE;
294 }
295
296 if (any_rx_active(i2s))
297 mod |= MOD_TXRX;
298 else
299 mod |= MOD_TXONLY;
300 } else {
301 if (is_secondary(i2s)) {
302 con |= CON_TXSDMA_PAUSE;
303 con &= ~CON_TXSDMA_ACTIVE;
304 } else {
305 con |= CON_TXDMA_PAUSE;
306 con &= ~CON_TXDMA_ACTIVE;
307 }
308
309 if (other_tx_active(i2s)) {
310 writel(con, addr + I2SCON);
311 return;
312 }
313
314 con |= CON_TXCH_PAUSE;
315
316 if (any_rx_active(i2s))
317 mod |= MOD_RXONLY;
318 else
319 con &= ~CON_ACTIVE;
320 }
321
322 writel(mod, addr + I2SMOD);
323 writel(con, addr + I2SCON);
324 }
325
326 /* RX Channel Control */
327 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
328 {
329 void __iomem *addr = i2s->addr;
330 u32 con = readl(addr + I2SCON);
331 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
332
333 if (on) {
334 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
335 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
336
337 if (any_tx_active(i2s))
338 mod |= MOD_TXRX;
339 else
340 mod |= MOD_RXONLY;
341 } else {
342 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
343 con &= ~CON_RXDMA_ACTIVE;
344
345 if (any_tx_active(i2s))
346 mod |= MOD_TXONLY;
347 else
348 con &= ~CON_ACTIVE;
349 }
350
351 writel(mod, addr + I2SMOD);
352 writel(con, addr + I2SCON);
353 }
354
355 /* Flush FIFO of an interface */
356 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
357 {
358 void __iomem *fic;
359 u32 val;
360
361 if (!i2s)
362 return;
363
364 if (is_secondary(i2s))
365 fic = i2s->addr + I2SFICS;
366 else
367 fic = i2s->addr + I2SFIC;
368
369 /* Flush the FIFO */
370 writel(readl(fic) | flush, fic);
371
372 /* Be patient */
373 val = msecs_to_loops(1) / 1000; /* 1 usec */
374 while (--val)
375 cpu_relax();
376
377 writel(readl(fic) & ~flush, fic);
378 }
379
380 static int i2s_set_sysclk(struct snd_soc_dai *dai,
381 int clk_id, unsigned int rfs, int dir)
382 {
383 struct i2s_dai *i2s = to_info(dai);
384 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
385 u32 mod = readl(i2s->addr + I2SMOD);
386
387 switch (clk_id) {
388 case SAMSUNG_I2S_CDCLK:
389 /* Shouldn't matter in GATING(CLOCK_IN) mode */
390 if (dir == SND_SOC_CLOCK_IN)
391 rfs = 0;
392
393 if ((rfs && other->rfs && (other->rfs != rfs)) ||
394 (any_active(i2s) &&
395 (((dir == SND_SOC_CLOCK_IN)
396 && !(mod & MOD_CDCLKCON)) ||
397 ((dir == SND_SOC_CLOCK_OUT)
398 && (mod & MOD_CDCLKCON))))) {
399 dev_err(&i2s->pdev->dev,
400 "%s:%d Other DAI busy\n", __func__, __LINE__);
401 return -EAGAIN;
402 }
403
404 if (dir == SND_SOC_CLOCK_IN)
405 mod |= MOD_CDCLKCON;
406 else
407 mod &= ~MOD_CDCLKCON;
408
409 i2s->rfs = rfs;
410 break;
411
412 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
413 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
414 if ((i2s->quirks & QUIRK_NO_MUXPSR)
415 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
416 clk_id = 0;
417 else
418 clk_id = 1;
419
420 if (!any_active(i2s)) {
421 if (i2s->op_clk) {
422 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
423 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
424 clk_disable(i2s->op_clk);
425 clk_put(i2s->op_clk);
426 } else {
427 i2s->rclk_srcrate =
428 clk_get_rate(i2s->op_clk);
429 return 0;
430 }
431 }
432
433 i2s->op_clk = clk_get(&i2s->pdev->dev,
434 i2s->src_clk[clk_id]);
435 clk_enable(i2s->op_clk);
436 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
437
438 /* Over-ride the other's */
439 if (other) {
440 other->op_clk = i2s->op_clk;
441 other->rclk_srcrate = i2s->rclk_srcrate;
442 }
443 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
444 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
445 dev_err(&i2s->pdev->dev,
446 "%s:%d Other DAI busy\n", __func__, __LINE__);
447 return -EAGAIN;
448 } else {
449 /* Call can't be on the active DAI */
450 i2s->op_clk = other->op_clk;
451 i2s->rclk_srcrate = other->rclk_srcrate;
452 return 0;
453 }
454
455 if (clk_id == 0)
456 mod &= ~MOD_IMS_SYSMUX;
457 else
458 mod |= MOD_IMS_SYSMUX;
459 break;
460
461 default:
462 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
463 return -EINVAL;
464 }
465
466 writel(mod, i2s->addr + I2SMOD);
467
468 return 0;
469 }
470
471 static int i2s_set_fmt(struct snd_soc_dai *dai,
472 unsigned int fmt)
473 {
474 struct i2s_dai *i2s = to_info(dai);
475 u32 mod = readl(i2s->addr + I2SMOD);
476 u32 tmp = 0;
477
478 /* Format is priority */
479 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
480 case SND_SOC_DAIFMT_RIGHT_J:
481 tmp |= MOD_LR_RLOW;
482 tmp |= MOD_SDF_MSB;
483 break;
484 case SND_SOC_DAIFMT_LEFT_J:
485 tmp |= MOD_LR_RLOW;
486 tmp |= MOD_SDF_LSB;
487 break;
488 case SND_SOC_DAIFMT_I2S:
489 tmp |= MOD_SDF_IIS;
490 break;
491 default:
492 dev_err(&i2s->pdev->dev, "Format not supported\n");
493 return -EINVAL;
494 }
495
496 /*
497 * INV flag is relative to the FORMAT flag - if set it simply
498 * flips the polarity specified by the Standard
499 */
500 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
501 case SND_SOC_DAIFMT_NB_NF:
502 break;
503 case SND_SOC_DAIFMT_NB_IF:
504 if (tmp & MOD_LR_RLOW)
505 tmp &= ~MOD_LR_RLOW;
506 else
507 tmp |= MOD_LR_RLOW;
508 break;
509 default:
510 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
511 return -EINVAL;
512 }
513
514 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
515 case SND_SOC_DAIFMT_CBM_CFM:
516 tmp |= MOD_SLAVE;
517 break;
518 case SND_SOC_DAIFMT_CBS_CFS:
519 /* Set default source clock in Master mode */
520 if (i2s->rclk_srcrate == 0)
521 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
522 0, SND_SOC_CLOCK_IN);
523 break;
524 default:
525 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
526 return -EINVAL;
527 }
528
529 if (any_active(i2s) &&
530 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
531 | MOD_SLAVE)) != tmp)) {
532 dev_err(&i2s->pdev->dev,
533 "%s:%d Other DAI busy\n", __func__, __LINE__);
534 return -EAGAIN;
535 }
536
537 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
538 mod |= tmp;
539 writel(mod, i2s->addr + I2SMOD);
540
541 return 0;
542 }
543
544 static int i2s_hw_params(struct snd_pcm_substream *substream,
545 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
546 {
547 struct i2s_dai *i2s = to_info(dai);
548 u32 mod = readl(i2s->addr + I2SMOD);
549
550 if (!is_secondary(i2s))
551 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
552
553 switch (params_channels(params)) {
554 case 6:
555 mod |= MOD_DC2_EN;
556 case 4:
557 mod |= MOD_DC1_EN;
558 break;
559 case 2:
560 break;
561 default:
562 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
563 params_channels(params));
564 return -EINVAL;
565 }
566
567 if (is_secondary(i2s))
568 mod &= ~MOD_BLCS_MASK;
569 else
570 mod &= ~MOD_BLCP_MASK;
571
572 if (is_manager(i2s))
573 mod &= ~MOD_BLC_MASK;
574
575 switch (params_format(params)) {
576 case SNDRV_PCM_FORMAT_S8:
577 if (is_secondary(i2s))
578 mod |= MOD_BLCS_8BIT;
579 else
580 mod |= MOD_BLCP_8BIT;
581 if (is_manager(i2s))
582 mod |= MOD_BLC_8BIT;
583 break;
584 case SNDRV_PCM_FORMAT_S16_LE:
585 if (is_secondary(i2s))
586 mod |= MOD_BLCS_16BIT;
587 else
588 mod |= MOD_BLCP_16BIT;
589 if (is_manager(i2s))
590 mod |= MOD_BLC_16BIT;
591 break;
592 case SNDRV_PCM_FORMAT_S24_LE:
593 if (is_secondary(i2s))
594 mod |= MOD_BLCS_24BIT;
595 else
596 mod |= MOD_BLCP_24BIT;
597 if (is_manager(i2s))
598 mod |= MOD_BLC_24BIT;
599 break;
600 default:
601 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
602 params_format(params));
603 return -EINVAL;
604 }
605 writel(mod, i2s->addr + I2SMOD);
606
607 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
608 snd_soc_dai_set_dma_data(dai, substream,
609 (void *)&i2s->dma_playback);
610 else
611 snd_soc_dai_set_dma_data(dai, substream,
612 (void *)&i2s->dma_capture);
613
614 i2s->frmclk = params_rate(params);
615
616 return 0;
617 }
618
619 /* We set constraints on the substream acc to the version of I2S */
620 static int i2s_startup(struct snd_pcm_substream *substream,
621 struct snd_soc_dai *dai)
622 {
623 struct i2s_dai *i2s = to_info(dai);
624 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
625 unsigned long flags;
626
627 spin_lock_irqsave(&lock, flags);
628
629 i2s->mode |= DAI_OPENED;
630
631 if (is_manager(other))
632 i2s->mode &= ~DAI_MANAGER;
633 else
634 i2s->mode |= DAI_MANAGER;
635
636 /* Enforce set_sysclk in Master mode */
637 i2s->rclk_srcrate = 0;
638
639 spin_unlock_irqrestore(&lock, flags);
640
641 return 0;
642 }
643
644 static void i2s_shutdown(struct snd_pcm_substream *substream,
645 struct snd_soc_dai *dai)
646 {
647 struct i2s_dai *i2s = to_info(dai);
648 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
649 unsigned long flags;
650
651 spin_lock_irqsave(&lock, flags);
652
653 i2s->mode &= ~DAI_OPENED;
654 i2s->mode &= ~DAI_MANAGER;
655
656 if (is_opened(other))
657 other->mode |= DAI_MANAGER;
658
659 /* Reset any constraint on RFS and BFS */
660 i2s->rfs = 0;
661 i2s->bfs = 0;
662
663 spin_unlock_irqrestore(&lock, flags);
664
665 /* Gate CDCLK by default */
666 if (!is_opened(other))
667 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
668 0, SND_SOC_CLOCK_IN);
669 }
670
671 static int config_setup(struct i2s_dai *i2s)
672 {
673 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
674 unsigned rfs, bfs, blc;
675 u32 psr;
676
677 blc = get_blc(i2s);
678
679 bfs = i2s->bfs;
680
681 if (!bfs && other)
682 bfs = other->bfs;
683
684 /* Select least possible multiple(2) if no constraint set */
685 if (!bfs)
686 bfs = blc * 2;
687
688 rfs = i2s->rfs;
689
690 if (!rfs && other)
691 rfs = other->rfs;
692
693 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
694 dev_err(&i2s->pdev->dev,
695 "%d-RFS not supported for 24-blc\n", rfs);
696 return -EINVAL;
697 }
698
699 if (!rfs) {
700 if (bfs == 16 || bfs == 32)
701 rfs = 256;
702 else
703 rfs = 384;
704 }
705
706 /* If already setup and running */
707 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
708 dev_err(&i2s->pdev->dev,
709 "%s:%d Other DAI busy\n", __func__, __LINE__);
710 return -EAGAIN;
711 }
712
713 /* Don't bother RFS, BFS & PSR in Slave mode */
714 if (is_slave(i2s))
715 return 0;
716
717 set_bfs(i2s, bfs);
718 set_rfs(i2s, rfs);
719
720 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
721 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
722 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
723 dev_dbg(&i2s->pdev->dev,
724 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
725 i2s->rclk_srcrate, psr, rfs, bfs);
726 }
727
728 return 0;
729 }
730
731 static int i2s_trigger(struct snd_pcm_substream *substream,
732 int cmd, struct snd_soc_dai *dai)
733 {
734 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
735 struct snd_soc_pcm_runtime *rtd = substream->private_data;
736 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
737 unsigned long flags;
738
739 switch (cmd) {
740 case SNDRV_PCM_TRIGGER_START:
741 case SNDRV_PCM_TRIGGER_RESUME:
742 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
743 local_irq_save(flags);
744
745 if (config_setup(i2s)) {
746 local_irq_restore(flags);
747 return -EINVAL;
748 }
749
750 if (capture)
751 i2s_rxctrl(i2s, 1);
752 else
753 i2s_txctrl(i2s, 1);
754
755 local_irq_restore(flags);
756 break;
757 case SNDRV_PCM_TRIGGER_STOP:
758 case SNDRV_PCM_TRIGGER_SUSPEND:
759 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
760 local_irq_save(flags);
761
762 if (capture)
763 i2s_rxctrl(i2s, 0);
764 else
765 i2s_txctrl(i2s, 0);
766
767 if (capture)
768 i2s_fifo(i2s, FIC_RXFLUSH);
769 else
770 i2s_fifo(i2s, FIC_TXFLUSH);
771
772 local_irq_restore(flags);
773 break;
774 }
775
776 return 0;
777 }
778
779 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
780 int div_id, int div)
781 {
782 struct i2s_dai *i2s = to_info(dai);
783 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
784
785 switch (div_id) {
786 case SAMSUNG_I2S_DIV_BCLK:
787 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
788 || (other && other->bfs && (other->bfs != div))) {
789 dev_err(&i2s->pdev->dev,
790 "%s:%d Other DAI busy\n", __func__, __LINE__);
791 return -EAGAIN;
792 }
793 i2s->bfs = div;
794 break;
795 default:
796 dev_err(&i2s->pdev->dev,
797 "Invalid clock divider(%d)\n", div_id);
798 return -EINVAL;
799 }
800
801 return 0;
802 }
803
804 static snd_pcm_sframes_t
805 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
806 {
807 struct i2s_dai *i2s = to_info(dai);
808 u32 reg = readl(i2s->addr + I2SFIC);
809 snd_pcm_sframes_t delay;
810
811 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
812 delay = FIC_RXCOUNT(reg);
813 else if (is_secondary(i2s))
814 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
815 else
816 delay = FIC_TXCOUNT(reg);
817
818 return delay;
819 }
820
821 #ifdef CONFIG_PM
822 static int i2s_suspend(struct snd_soc_dai *dai)
823 {
824 struct i2s_dai *i2s = to_info(dai);
825
826 if (dai->active) {
827 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
828 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
829 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
830 }
831
832 return 0;
833 }
834
835 static int i2s_resume(struct snd_soc_dai *dai)
836 {
837 struct i2s_dai *i2s = to_info(dai);
838
839 if (dai->active) {
840 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
841 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
842 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
843 }
844
845 return 0;
846 }
847 #else
848 #define i2s_suspend NULL
849 #define i2s_resume NULL
850 #endif
851
852 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
853 {
854 struct i2s_dai *i2s = to_info(dai);
855 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
856
857 if (other && other->clk) /* If this is probe on secondary */
858 goto probe_exit;
859
860 i2s->addr = ioremap(i2s->base, 0x100);
861 if (i2s->addr == NULL) {
862 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
863 return -ENXIO;
864 }
865
866 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
867 if (IS_ERR(i2s->clk)) {
868 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
869 iounmap(i2s->addr);
870 return -ENOENT;
871 }
872 clk_enable(i2s->clk);
873
874 if (other) {
875 other->addr = i2s->addr;
876 other->clk = i2s->clk;
877 }
878
879 if (i2s->quirks & QUIRK_NEED_RSTCLR)
880 writel(CON_RSTCLR, i2s->addr + I2SCON);
881
882 if (i2s->quirks & QUIRK_SEC_DAI)
883 idma_reg_addr_init((void *)i2s->addr,
884 i2s->sec_dai->idma_playback.dma_addr);
885
886 probe_exit:
887 /* Reset any constraint on RFS and BFS */
888 i2s->rfs = 0;
889 i2s->bfs = 0;
890 i2s_txctrl(i2s, 0);
891 i2s_rxctrl(i2s, 0);
892 i2s_fifo(i2s, FIC_TXFLUSH);
893 i2s_fifo(other, FIC_TXFLUSH);
894 i2s_fifo(i2s, FIC_RXFLUSH);
895
896 /* Gate CDCLK by default */
897 if (!is_opened(other))
898 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
899 0, SND_SOC_CLOCK_IN);
900
901 return 0;
902 }
903
904 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
905 {
906 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
907 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
908
909 if (!other || !other->clk) {
910
911 if (i2s->quirks & QUIRK_NEED_RSTCLR)
912 writel(0, i2s->addr + I2SCON);
913
914 clk_disable(i2s->clk);
915 clk_put(i2s->clk);
916
917 iounmap(i2s->addr);
918 }
919
920 i2s->clk = NULL;
921
922 return 0;
923 }
924
925 static struct snd_soc_dai_ops samsung_i2s_dai_ops = {
926 .trigger = i2s_trigger,
927 .hw_params = i2s_hw_params,
928 .set_fmt = i2s_set_fmt,
929 .set_clkdiv = i2s_set_clkdiv,
930 .set_sysclk = i2s_set_sysclk,
931 .startup = i2s_startup,
932 .shutdown = i2s_shutdown,
933 .delay = i2s_delay,
934 };
935
936 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
937
938 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
939 SNDRV_PCM_FMTBIT_S16_LE | \
940 SNDRV_PCM_FMTBIT_S24_LE)
941
942 static __devinit
943 struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
944 {
945 struct i2s_dai *i2s;
946
947 i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL);
948 if (i2s == NULL)
949 return NULL;
950
951 i2s->pdev = pdev;
952 i2s->pri_dai = NULL;
953 i2s->sec_dai = NULL;
954 i2s->i2s_dai_drv.symmetric_rates = 1;
955 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
956 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
957 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
958 i2s->i2s_dai_drv.suspend = i2s_suspend;
959 i2s->i2s_dai_drv.resume = i2s_resume;
960 i2s->i2s_dai_drv.playback.channels_min = 2;
961 i2s->i2s_dai_drv.playback.channels_max = 2;
962 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
963 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
964
965 if (!sec) {
966 i2s->i2s_dai_drv.capture.channels_min = 2;
967 i2s->i2s_dai_drv.capture.channels_max = 2;
968 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
969 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
970 } else { /* Create a new platform_device for Secondary */
971 i2s->pdev = platform_device_register_resndata(NULL,
972 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
973 NULL, 0, NULL, 0);
974 if (IS_ERR(i2s->pdev)) {
975 kfree(i2s);
976 return NULL;
977 }
978 }
979
980 /* Pre-assign snd_soc_dai_set_drvdata */
981 dev_set_drvdata(&i2s->pdev->dev, i2s);
982
983 return i2s;
984 }
985
986 static __devinit int samsung_i2s_probe(struct platform_device *pdev)
987 {
988 u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
989 struct i2s_dai *pri_dai, *sec_dai = NULL;
990 struct s3c_audio_pdata *i2s_pdata;
991 struct samsung_i2s *i2s_cfg;
992 struct resource *res;
993 u32 regs_base, quirks;
994 int ret = 0;
995
996 /* Call during Seconday interface registration */
997 if (pdev->id >= SAMSUNG_I2S_SECOFF) {
998 sec_dai = dev_get_drvdata(&pdev->dev);
999 snd_soc_register_dai(&sec_dai->pdev->dev,
1000 &sec_dai->i2s_dai_drv);
1001 return 0;
1002 }
1003
1004 i2s_pdata = pdev->dev.platform_data;
1005 if (i2s_pdata == NULL) {
1006 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1007 return -EINVAL;
1008 }
1009
1010 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1011 if (!res) {
1012 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
1013 return -ENXIO;
1014 }
1015 dma_pl_chan = res->start;
1016
1017 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1018 if (!res) {
1019 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
1020 return -ENXIO;
1021 }
1022 dma_cp_chan = res->start;
1023
1024 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1025 if (res)
1026 dma_pl_sec_chan = res->start;
1027 else
1028 dma_pl_sec_chan = 0;
1029
1030 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1031 if (!res) {
1032 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1033 return -ENXIO;
1034 }
1035
1036 if (!request_mem_region(res->start, resource_size(res),
1037 "samsung-i2s")) {
1038 dev_err(&pdev->dev, "Unable to request SFR region\n");
1039 return -EBUSY;
1040 }
1041 regs_base = res->start;
1042
1043 i2s_cfg = &i2s_pdata->type.i2s;
1044 quirks = i2s_cfg->quirks;
1045
1046 pri_dai = i2s_alloc_dai(pdev, false);
1047 if (!pri_dai) {
1048 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1049 ret = -ENOMEM;
1050 goto err1;
1051 }
1052
1053 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1054 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1055 pri_dai->dma_playback.client =
1056 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1057 pri_dai->dma_capture.client =
1058 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1059 pri_dai->dma_playback.channel = dma_pl_chan;
1060 pri_dai->dma_capture.channel = dma_cp_chan;
1061 pri_dai->src_clk = i2s_cfg->src_clk;
1062 pri_dai->dma_playback.dma_size = 4;
1063 pri_dai->dma_capture.dma_size = 4;
1064 pri_dai->base = regs_base;
1065 pri_dai->quirks = quirks;
1066
1067 if (quirks & QUIRK_PRI_6CHAN)
1068 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1069
1070 if (quirks & QUIRK_SEC_DAI) {
1071 sec_dai = i2s_alloc_dai(pdev, true);
1072 if (!sec_dai) {
1073 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1074 ret = -ENOMEM;
1075 goto err2;
1076 }
1077 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1078 sec_dai->dma_playback.client =
1079 (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1080 /* Use iDMA always if SysDMA not provided */
1081 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
1082 sec_dai->src_clk = i2s_cfg->src_clk;
1083 sec_dai->dma_playback.dma_size = 4;
1084 sec_dai->base = regs_base;
1085 sec_dai->quirks = quirks;
1086 sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr;
1087 sec_dai->pri_dai = pri_dai;
1088 pri_dai->sec_dai = sec_dai;
1089 }
1090
1091 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1092 dev_err(&pdev->dev, "Unable to configure gpio\n");
1093 ret = -EINVAL;
1094 goto err3;
1095 }
1096
1097 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
1098
1099 return 0;
1100 err3:
1101 kfree(sec_dai);
1102 err2:
1103 kfree(pri_dai);
1104 err1:
1105 release_mem_region(regs_base, resource_size(res));
1106
1107 return ret;
1108 }
1109
1110 static __devexit int samsung_i2s_remove(struct platform_device *pdev)
1111 {
1112 struct i2s_dai *i2s, *other;
1113
1114 i2s = dev_get_drvdata(&pdev->dev);
1115 other = i2s->pri_dai ? : i2s->sec_dai;
1116
1117 if (other) {
1118 other->pri_dai = NULL;
1119 other->sec_dai = NULL;
1120 } else {
1121 struct resource *res;
1122 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1123 if (res)
1124 release_mem_region(res->start, resource_size(res));
1125 }
1126
1127 i2s->pri_dai = NULL;
1128 i2s->sec_dai = NULL;
1129
1130 kfree(i2s);
1131
1132 snd_soc_unregister_dai(&pdev->dev);
1133
1134 return 0;
1135 }
1136
1137 static struct platform_driver samsung_i2s_driver = {
1138 .probe = samsung_i2s_probe,
1139 .remove = samsung_i2s_remove,
1140 .driver = {
1141 .name = "samsung-i2s",
1142 .owner = THIS_MODULE,
1143 },
1144 };
1145
1146 static int __init samsung_i2s_init(void)
1147 {
1148 return platform_driver_register(&samsung_i2s_driver);
1149 }
1150 module_init(samsung_i2s_init);
1151
1152 static void __exit samsung_i2s_exit(void)
1153 {
1154 platform_driver_unregister(&samsung_i2s_driver);
1155 }
1156 module_exit(samsung_i2s_exit);
1157
1158 /* Module information */
1159 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
1160 MODULE_DESCRIPTION("Samsung I2S Interface");
1161 MODULE_ALIAS("platform:samsung-i2s");
1162 MODULE_LICENSE("GPL");
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