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Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
[deliverable/linux.git] / sound / soc / samsung / i2s.c
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 <jassisinghbrar@gmail.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 #include <linux/module.h>
18 #include <linux/of.h>
19 #include <linux/of_gpio.h>
20 #include <linux/pm_runtime.h>
21
22 #include <sound/soc.h>
23 #include <sound/pcm_params.h>
24
25 #include <linux/platform_data/asoc-s3c.h>
26
27 #include "dma.h"
28 #include "idma.h"
29 #include "i2s.h"
30 #include "i2s-regs.h"
31
32 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
33
34 enum samsung_dai_type {
35 TYPE_PRI,
36 TYPE_SEC,
37 };
38
39 struct samsung_i2s_dai_data {
40 int dai_type;
41 u32 quirks;
42 };
43
44 struct i2s_dai {
45 /* Platform device for this DAI */
46 struct platform_device *pdev;
47 /* IOREMAP'd SFRs */
48 void __iomem *addr;
49 /* Physical base address of SFRs */
50 u32 base;
51 /* Rate of RCLK source clock */
52 unsigned long rclk_srcrate;
53 /* Frame Clock */
54 unsigned frmclk;
55 /*
56 * Specifically requested RCLK,BCLK by MACHINE Driver.
57 * 0 indicates CPU driver is free to choose any value.
58 */
59 unsigned rfs, bfs;
60 /* I2S Controller's core clock */
61 struct clk *clk;
62 /* Clock for generating I2S signals */
63 struct clk *op_clk;
64 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
65 struct i2s_dai *pri_dai;
66 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
67 struct i2s_dai *sec_dai;
68 #define DAI_OPENED (1 << 0) /* Dai is opened */
69 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
70 unsigned mode;
71 /* Driver for this DAI */
72 struct snd_soc_dai_driver i2s_dai_drv;
73 /* DMA parameters */
74 struct s3c_dma_params dma_playback;
75 struct s3c_dma_params dma_capture;
76 struct s3c_dma_params idma_playback;
77 u32 quirks;
78 u32 suspend_i2smod;
79 u32 suspend_i2scon;
80 u32 suspend_i2spsr;
81 unsigned long gpios[7]; /* i2s gpio line numbers */
82 };
83
84 /* Lock for cross i/f checks */
85 static DEFINE_SPINLOCK(lock);
86
87 /* If this is the 'overlay' stereo DAI */
88 static inline bool is_secondary(struct i2s_dai *i2s)
89 {
90 return i2s->pri_dai ? true : false;
91 }
92
93 /* If operating in SoC-Slave mode */
94 static inline bool is_slave(struct i2s_dai *i2s)
95 {
96 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
97 }
98
99 /* If this interface of the controller is transmitting data */
100 static inline bool tx_active(struct i2s_dai *i2s)
101 {
102 u32 active;
103
104 if (!i2s)
105 return false;
106
107 active = readl(i2s->addr + I2SCON);
108
109 if (is_secondary(i2s))
110 active &= CON_TXSDMA_ACTIVE;
111 else
112 active &= CON_TXDMA_ACTIVE;
113
114 return active ? true : false;
115 }
116
117 /* If the other interface of the controller is transmitting data */
118 static inline bool other_tx_active(struct i2s_dai *i2s)
119 {
120 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
121
122 return tx_active(other);
123 }
124
125 /* If any interface of the controller is transmitting data */
126 static inline bool any_tx_active(struct i2s_dai *i2s)
127 {
128 return tx_active(i2s) || other_tx_active(i2s);
129 }
130
131 /* If this interface of the controller is receiving data */
132 static inline bool rx_active(struct i2s_dai *i2s)
133 {
134 u32 active;
135
136 if (!i2s)
137 return false;
138
139 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
140
141 return active ? true : false;
142 }
143
144 /* If the other interface of the controller is receiving data */
145 static inline bool other_rx_active(struct i2s_dai *i2s)
146 {
147 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
148
149 return rx_active(other);
150 }
151
152 /* If any interface of the controller is receiving data */
153 static inline bool any_rx_active(struct i2s_dai *i2s)
154 {
155 return rx_active(i2s) || other_rx_active(i2s);
156 }
157
158 /* If the other DAI is transmitting or receiving data */
159 static inline bool other_active(struct i2s_dai *i2s)
160 {
161 return other_rx_active(i2s) || other_tx_active(i2s);
162 }
163
164 /* If this DAI is transmitting or receiving data */
165 static inline bool this_active(struct i2s_dai *i2s)
166 {
167 return tx_active(i2s) || rx_active(i2s);
168 }
169
170 /* If the controller is active anyway */
171 static inline bool any_active(struct i2s_dai *i2s)
172 {
173 return this_active(i2s) || other_active(i2s);
174 }
175
176 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
177 {
178 return snd_soc_dai_get_drvdata(dai);
179 }
180
181 static inline bool is_opened(struct i2s_dai *i2s)
182 {
183 if (i2s && (i2s->mode & DAI_OPENED))
184 return true;
185 else
186 return false;
187 }
188
189 static inline bool is_manager(struct i2s_dai *i2s)
190 {
191 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
192 return true;
193 else
194 return false;
195 }
196
197 /* Read RCLK of I2S (in multiples of LRCLK) */
198 static inline unsigned get_rfs(struct i2s_dai *i2s)
199 {
200 u32 rfs;
201
202 if (i2s->quirks & QUIRK_SUPPORTS_TDM)
203 rfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_RCLK_SHIFT;
204 else
205 rfs = (readl(i2s->addr + I2SMOD) >> MOD_RCLK_SHIFT);
206 rfs &= MOD_RCLK_MASK;
207
208 switch (rfs) {
209 case 3: return 768;
210 case 2: return 384;
211 case 1: return 512;
212 default: return 256;
213 }
214 }
215
216 /* Write RCLK of I2S (in multiples of LRCLK) */
217 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
218 {
219 u32 mod = readl(i2s->addr + I2SMOD);
220 int rfs_shift;
221
222 if (i2s->quirks & QUIRK_SUPPORTS_TDM)
223 rfs_shift = EXYNOS5420_MOD_RCLK_SHIFT;
224 else
225 rfs_shift = MOD_RCLK_SHIFT;
226 mod &= ~(MOD_RCLK_MASK << rfs_shift);
227
228 switch (rfs) {
229 case 768:
230 mod |= (MOD_RCLK_768FS << rfs_shift);
231 break;
232 case 512:
233 mod |= (MOD_RCLK_512FS << rfs_shift);
234 break;
235 case 384:
236 mod |= (MOD_RCLK_384FS << rfs_shift);
237 break;
238 default:
239 mod |= (MOD_RCLK_256FS << rfs_shift);
240 break;
241 }
242
243 writel(mod, i2s->addr + I2SMOD);
244 }
245
246 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
247 static inline unsigned get_bfs(struct i2s_dai *i2s)
248 {
249 u32 bfs;
250
251 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
252 bfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_BCLK_SHIFT;
253 bfs &= EXYNOS5420_MOD_BCLK_MASK;
254 } else {
255 bfs = readl(i2s->addr + I2SMOD) >> MOD_BCLK_SHIFT;
256 bfs &= MOD_BCLK_MASK;
257 }
258
259 switch (bfs) {
260 case 8: return 256;
261 case 7: return 192;
262 case 6: return 128;
263 case 5: return 96;
264 case 4: return 64;
265 case 3: return 24;
266 case 2: return 16;
267 case 1: return 48;
268 default: return 32;
269 }
270 }
271
272 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
273 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
274 {
275 u32 mod = readl(i2s->addr + I2SMOD);
276 int bfs_shift;
277 int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM;
278
279 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
280 bfs_shift = EXYNOS5420_MOD_BCLK_SHIFT;
281 mod &= ~(EXYNOS5420_MOD_BCLK_MASK << bfs_shift);
282 } else {
283 bfs_shift = MOD_BCLK_SHIFT;
284 mod &= ~(MOD_BCLK_MASK << bfs_shift);
285 }
286
287 /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
288 if (!tdm && bfs > 48) {
289 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
290 return;
291 }
292
293 switch (bfs) {
294 case 48:
295 mod |= (MOD_BCLK_48FS << bfs_shift);
296 break;
297 case 32:
298 mod |= (MOD_BCLK_32FS << bfs_shift);
299 break;
300 case 24:
301 mod |= (MOD_BCLK_24FS << bfs_shift);
302 break;
303 case 16:
304 mod |= (MOD_BCLK_16FS << bfs_shift);
305 break;
306 case 64:
307 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
308 break;
309 case 96:
310 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
311 break;
312 case 128:
313 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
314 break;
315 case 192:
316 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
317 break;
318 case 256:
319 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
320 break;
321 default:
322 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
323 return;
324 }
325
326 writel(mod, i2s->addr + I2SMOD);
327 }
328
329 /* Sample-Size */
330 static inline int get_blc(struct i2s_dai *i2s)
331 {
332 int blc = readl(i2s->addr + I2SMOD);
333
334 blc = (blc >> 13) & 0x3;
335
336 switch (blc) {
337 case 2: return 24;
338 case 1: return 8;
339 default: return 16;
340 }
341 }
342
343 /* TX Channel Control */
344 static void i2s_txctrl(struct i2s_dai *i2s, int on)
345 {
346 void __iomem *addr = i2s->addr;
347 u32 con = readl(addr + I2SCON);
348 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
349
350 if (on) {
351 con |= CON_ACTIVE;
352 con &= ~CON_TXCH_PAUSE;
353
354 if (is_secondary(i2s)) {
355 con |= CON_TXSDMA_ACTIVE;
356 con &= ~CON_TXSDMA_PAUSE;
357 } else {
358 con |= CON_TXDMA_ACTIVE;
359 con &= ~CON_TXDMA_PAUSE;
360 }
361
362 if (any_rx_active(i2s))
363 mod |= MOD_TXRX;
364 else
365 mod |= MOD_TXONLY;
366 } else {
367 if (is_secondary(i2s)) {
368 con |= CON_TXSDMA_PAUSE;
369 con &= ~CON_TXSDMA_ACTIVE;
370 } else {
371 con |= CON_TXDMA_PAUSE;
372 con &= ~CON_TXDMA_ACTIVE;
373 }
374
375 if (other_tx_active(i2s)) {
376 writel(con, addr + I2SCON);
377 return;
378 }
379
380 con |= CON_TXCH_PAUSE;
381
382 if (any_rx_active(i2s))
383 mod |= MOD_RXONLY;
384 else
385 con &= ~CON_ACTIVE;
386 }
387
388 writel(mod, addr + I2SMOD);
389 writel(con, addr + I2SCON);
390 }
391
392 /* RX Channel Control */
393 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
394 {
395 void __iomem *addr = i2s->addr;
396 u32 con = readl(addr + I2SCON);
397 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
398
399 if (on) {
400 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
401 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
402
403 if (any_tx_active(i2s))
404 mod |= MOD_TXRX;
405 else
406 mod |= MOD_RXONLY;
407 } else {
408 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
409 con &= ~CON_RXDMA_ACTIVE;
410
411 if (any_tx_active(i2s))
412 mod |= MOD_TXONLY;
413 else
414 con &= ~CON_ACTIVE;
415 }
416
417 writel(mod, addr + I2SMOD);
418 writel(con, addr + I2SCON);
419 }
420
421 /* Flush FIFO of an interface */
422 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
423 {
424 void __iomem *fic;
425 u32 val;
426
427 if (!i2s)
428 return;
429
430 if (is_secondary(i2s))
431 fic = i2s->addr + I2SFICS;
432 else
433 fic = i2s->addr + I2SFIC;
434
435 /* Flush the FIFO */
436 writel(readl(fic) | flush, fic);
437
438 /* Be patient */
439 val = msecs_to_loops(1) / 1000; /* 1 usec */
440 while (--val)
441 cpu_relax();
442
443 writel(readl(fic) & ~flush, fic);
444 }
445
446 static int i2s_set_sysclk(struct snd_soc_dai *dai,
447 int clk_id, unsigned int rfs, int dir)
448 {
449 struct i2s_dai *i2s = to_info(dai);
450 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
451 u32 mod = readl(i2s->addr + I2SMOD);
452
453 switch (clk_id) {
454 case SAMSUNG_I2S_CDCLK:
455 /* Shouldn't matter in GATING(CLOCK_IN) mode */
456 if (dir == SND_SOC_CLOCK_IN)
457 rfs = 0;
458
459 if ((rfs && other->rfs && (other->rfs != rfs)) ||
460 (any_active(i2s) &&
461 (((dir == SND_SOC_CLOCK_IN)
462 && !(mod & MOD_CDCLKCON)) ||
463 ((dir == SND_SOC_CLOCK_OUT)
464 && (mod & MOD_CDCLKCON))))) {
465 dev_err(&i2s->pdev->dev,
466 "%s:%d Other DAI busy\n", __func__, __LINE__);
467 return -EAGAIN;
468 }
469
470 if (dir == SND_SOC_CLOCK_IN)
471 mod |= MOD_CDCLKCON;
472 else
473 mod &= ~MOD_CDCLKCON;
474
475 i2s->rfs = rfs;
476 break;
477
478 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
479 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
480 if ((i2s->quirks & QUIRK_NO_MUXPSR)
481 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
482 clk_id = 0;
483 else
484 clk_id = 1;
485
486 if (!any_active(i2s)) {
487 if (i2s->op_clk) {
488 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
489 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
490 clk_disable_unprepare(i2s->op_clk);
491 clk_put(i2s->op_clk);
492 } else {
493 i2s->rclk_srcrate =
494 clk_get_rate(i2s->op_clk);
495 return 0;
496 }
497 }
498
499 if (clk_id)
500 i2s->op_clk = clk_get(&i2s->pdev->dev,
501 "i2s_opclk1");
502 else
503 i2s->op_clk = clk_get(&i2s->pdev->dev,
504 "i2s_opclk0");
505 clk_prepare_enable(i2s->op_clk);
506 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
507
508 /* Over-ride the other's */
509 if (other) {
510 other->op_clk = i2s->op_clk;
511 other->rclk_srcrate = i2s->rclk_srcrate;
512 }
513 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
514 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
515 dev_err(&i2s->pdev->dev,
516 "%s:%d Other DAI busy\n", __func__, __LINE__);
517 return -EAGAIN;
518 } else {
519 /* Call can't be on the active DAI */
520 i2s->op_clk = other->op_clk;
521 i2s->rclk_srcrate = other->rclk_srcrate;
522 return 0;
523 }
524
525 if (clk_id == 0)
526 mod &= ~MOD_IMS_SYSMUX;
527 else
528 mod |= MOD_IMS_SYSMUX;
529 break;
530
531 default:
532 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
533 return -EINVAL;
534 }
535
536 writel(mod, i2s->addr + I2SMOD);
537
538 return 0;
539 }
540
541 static int i2s_set_fmt(struct snd_soc_dai *dai,
542 unsigned int fmt)
543 {
544 struct i2s_dai *i2s = to_info(dai);
545 u32 mod = readl(i2s->addr + I2SMOD);
546 int lrp_shift, sdf_shift, sdf_mask, lrp_rlow;
547 u32 tmp = 0;
548
549 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
550 lrp_shift = EXYNOS5420_MOD_LRP_SHIFT;
551 sdf_shift = EXYNOS5420_MOD_SDF_SHIFT;
552 } else {
553 lrp_shift = MOD_LRP_SHIFT;
554 sdf_shift = MOD_SDF_SHIFT;
555 }
556
557 sdf_mask = MOD_SDF_MASK << sdf_shift;
558 lrp_rlow = MOD_LR_RLOW << lrp_shift;
559
560 /* Format is priority */
561 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
562 case SND_SOC_DAIFMT_RIGHT_J:
563 tmp |= lrp_rlow;
564 tmp |= (MOD_SDF_MSB << sdf_shift);
565 break;
566 case SND_SOC_DAIFMT_LEFT_J:
567 tmp |= lrp_rlow;
568 tmp |= (MOD_SDF_LSB << sdf_shift);
569 break;
570 case SND_SOC_DAIFMT_I2S:
571 tmp |= (MOD_SDF_IIS << sdf_shift);
572 break;
573 default:
574 dev_err(&i2s->pdev->dev, "Format not supported\n");
575 return -EINVAL;
576 }
577
578 /*
579 * INV flag is relative to the FORMAT flag - if set it simply
580 * flips the polarity specified by the Standard
581 */
582 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
583 case SND_SOC_DAIFMT_NB_NF:
584 break;
585 case SND_SOC_DAIFMT_NB_IF:
586 if (tmp & lrp_rlow)
587 tmp &= ~lrp_rlow;
588 else
589 tmp |= lrp_rlow;
590 break;
591 default:
592 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
593 return -EINVAL;
594 }
595
596 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
597 case SND_SOC_DAIFMT_CBM_CFM:
598 tmp |= MOD_SLAVE;
599 break;
600 case SND_SOC_DAIFMT_CBS_CFS:
601 /* Set default source clock in Master mode */
602 if (i2s->rclk_srcrate == 0)
603 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
604 0, SND_SOC_CLOCK_IN);
605 break;
606 default:
607 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
608 return -EINVAL;
609 }
610
611 /*
612 * Don't change the I2S mode if any controller is active on this
613 * channel.
614 */
615 if (any_active(i2s) &&
616 ((mod & (sdf_mask | lrp_rlow | MOD_SLAVE)) != tmp)) {
617 dev_err(&i2s->pdev->dev,
618 "%s:%d Other DAI busy\n", __func__, __LINE__);
619 return -EAGAIN;
620 }
621
622 mod &= ~(sdf_mask | lrp_rlow | MOD_SLAVE);
623 mod |= tmp;
624 writel(mod, i2s->addr + I2SMOD);
625
626 return 0;
627 }
628
629 static int i2s_hw_params(struct snd_pcm_substream *substream,
630 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
631 {
632 struct i2s_dai *i2s = to_info(dai);
633 u32 mod = readl(i2s->addr + I2SMOD);
634
635 if (!is_secondary(i2s))
636 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
637
638 switch (params_channels(params)) {
639 case 6:
640 mod |= MOD_DC2_EN;
641 case 4:
642 mod |= MOD_DC1_EN;
643 break;
644 case 2:
645 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
646 i2s->dma_playback.dma_size = 4;
647 else
648 i2s->dma_capture.dma_size = 4;
649 break;
650 case 1:
651 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
652 i2s->dma_playback.dma_size = 2;
653 else
654 i2s->dma_capture.dma_size = 2;
655
656 break;
657 default:
658 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
659 params_channels(params));
660 return -EINVAL;
661 }
662
663 if (is_secondary(i2s))
664 mod &= ~MOD_BLCS_MASK;
665 else
666 mod &= ~MOD_BLCP_MASK;
667
668 if (is_manager(i2s))
669 mod &= ~MOD_BLC_MASK;
670
671 switch (params_format(params)) {
672 case SNDRV_PCM_FORMAT_S8:
673 if (is_secondary(i2s))
674 mod |= MOD_BLCS_8BIT;
675 else
676 mod |= MOD_BLCP_8BIT;
677 if (is_manager(i2s))
678 mod |= MOD_BLC_8BIT;
679 break;
680 case SNDRV_PCM_FORMAT_S16_LE:
681 if (is_secondary(i2s))
682 mod |= MOD_BLCS_16BIT;
683 else
684 mod |= MOD_BLCP_16BIT;
685 if (is_manager(i2s))
686 mod |= MOD_BLC_16BIT;
687 break;
688 case SNDRV_PCM_FORMAT_S24_LE:
689 if (is_secondary(i2s))
690 mod |= MOD_BLCS_24BIT;
691 else
692 mod |= MOD_BLCP_24BIT;
693 if (is_manager(i2s))
694 mod |= MOD_BLC_24BIT;
695 break;
696 default:
697 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
698 params_format(params));
699 return -EINVAL;
700 }
701 writel(mod, i2s->addr + I2SMOD);
702
703 samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
704
705 i2s->frmclk = params_rate(params);
706
707 return 0;
708 }
709
710 /* We set constraints on the substream acc to the version of I2S */
711 static int i2s_startup(struct snd_pcm_substream *substream,
712 struct snd_soc_dai *dai)
713 {
714 struct i2s_dai *i2s = to_info(dai);
715 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
716 unsigned long flags;
717
718 spin_lock_irqsave(&lock, flags);
719
720 i2s->mode |= DAI_OPENED;
721
722 if (is_manager(other))
723 i2s->mode &= ~DAI_MANAGER;
724 else
725 i2s->mode |= DAI_MANAGER;
726
727 /* Enforce set_sysclk in Master mode */
728 i2s->rclk_srcrate = 0;
729
730 if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR))
731 writel(CON_RSTCLR, i2s->addr + I2SCON);
732
733 spin_unlock_irqrestore(&lock, flags);
734
735 return 0;
736 }
737
738 static void i2s_shutdown(struct snd_pcm_substream *substream,
739 struct snd_soc_dai *dai)
740 {
741 struct i2s_dai *i2s = to_info(dai);
742 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
743 unsigned long flags;
744
745 spin_lock_irqsave(&lock, flags);
746
747 i2s->mode &= ~DAI_OPENED;
748 i2s->mode &= ~DAI_MANAGER;
749
750 if (is_opened(other))
751 other->mode |= DAI_MANAGER;
752
753 /* Reset any constraint on RFS and BFS */
754 i2s->rfs = 0;
755 i2s->bfs = 0;
756
757 spin_unlock_irqrestore(&lock, flags);
758
759 /* Gate CDCLK by default */
760 if (!is_opened(other))
761 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
762 0, SND_SOC_CLOCK_IN);
763 }
764
765 static int config_setup(struct i2s_dai *i2s)
766 {
767 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
768 unsigned rfs, bfs, blc;
769 u32 psr;
770
771 blc = get_blc(i2s);
772
773 bfs = i2s->bfs;
774
775 if (!bfs && other)
776 bfs = other->bfs;
777
778 /* Select least possible multiple(2) if no constraint set */
779 if (!bfs)
780 bfs = blc * 2;
781
782 rfs = i2s->rfs;
783
784 if (!rfs && other)
785 rfs = other->rfs;
786
787 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
788 dev_err(&i2s->pdev->dev,
789 "%d-RFS not supported for 24-blc\n", rfs);
790 return -EINVAL;
791 }
792
793 if (!rfs) {
794 if (bfs == 16 || bfs == 32)
795 rfs = 256;
796 else
797 rfs = 384;
798 }
799
800 /* If already setup and running */
801 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
802 dev_err(&i2s->pdev->dev,
803 "%s:%d Other DAI busy\n", __func__, __LINE__);
804 return -EAGAIN;
805 }
806
807 set_bfs(i2s, bfs);
808 set_rfs(i2s, rfs);
809
810 /* Don't bother with PSR in Slave mode */
811 if (is_slave(i2s))
812 return 0;
813
814 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
815 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
816 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
817 dev_dbg(&i2s->pdev->dev,
818 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
819 i2s->rclk_srcrate, psr, rfs, bfs);
820 }
821
822 return 0;
823 }
824
825 static int i2s_trigger(struct snd_pcm_substream *substream,
826 int cmd, struct snd_soc_dai *dai)
827 {
828 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
829 struct snd_soc_pcm_runtime *rtd = substream->private_data;
830 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
831 unsigned long flags;
832
833 switch (cmd) {
834 case SNDRV_PCM_TRIGGER_START:
835 case SNDRV_PCM_TRIGGER_RESUME:
836 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
837 local_irq_save(flags);
838
839 if (config_setup(i2s)) {
840 local_irq_restore(flags);
841 return -EINVAL;
842 }
843
844 if (capture)
845 i2s_rxctrl(i2s, 1);
846 else
847 i2s_txctrl(i2s, 1);
848
849 local_irq_restore(flags);
850 break;
851 case SNDRV_PCM_TRIGGER_STOP:
852 case SNDRV_PCM_TRIGGER_SUSPEND:
853 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
854 local_irq_save(flags);
855
856 if (capture) {
857 i2s_rxctrl(i2s, 0);
858 i2s_fifo(i2s, FIC_RXFLUSH);
859 } else {
860 i2s_txctrl(i2s, 0);
861 i2s_fifo(i2s, FIC_TXFLUSH);
862 }
863
864 local_irq_restore(flags);
865 break;
866 }
867
868 return 0;
869 }
870
871 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
872 int div_id, int div)
873 {
874 struct i2s_dai *i2s = to_info(dai);
875 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
876
877 switch (div_id) {
878 case SAMSUNG_I2S_DIV_BCLK:
879 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
880 || (other && other->bfs && (other->bfs != div))) {
881 dev_err(&i2s->pdev->dev,
882 "%s:%d Other DAI busy\n", __func__, __LINE__);
883 return -EAGAIN;
884 }
885 i2s->bfs = div;
886 break;
887 default:
888 dev_err(&i2s->pdev->dev,
889 "Invalid clock divider(%d)\n", div_id);
890 return -EINVAL;
891 }
892
893 return 0;
894 }
895
896 static snd_pcm_sframes_t
897 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
898 {
899 struct i2s_dai *i2s = to_info(dai);
900 u32 reg = readl(i2s->addr + I2SFIC);
901 snd_pcm_sframes_t delay;
902
903 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
904 delay = FIC_RXCOUNT(reg);
905 else if (is_secondary(i2s))
906 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
907 else
908 delay = FIC_TXCOUNT(reg);
909
910 return delay;
911 }
912
913 #ifdef CONFIG_PM
914 static int i2s_suspend(struct snd_soc_dai *dai)
915 {
916 struct i2s_dai *i2s = to_info(dai);
917
918 if (dai->active) {
919 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
920 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
921 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
922 }
923
924 return 0;
925 }
926
927 static int i2s_resume(struct snd_soc_dai *dai)
928 {
929 struct i2s_dai *i2s = to_info(dai);
930
931 if (dai->active) {
932 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
933 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
934 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
935 }
936
937 return 0;
938 }
939 #else
940 #define i2s_suspend NULL
941 #define i2s_resume NULL
942 #endif
943
944 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
945 {
946 struct i2s_dai *i2s = to_info(dai);
947 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
948
949 if (other && other->clk) { /* If this is probe on secondary */
950 samsung_asoc_init_dma_data(dai, &other->sec_dai->dma_playback,
951 NULL);
952 goto probe_exit;
953 }
954
955 i2s->addr = ioremap(i2s->base, 0x100);
956 if (i2s->addr == NULL) {
957 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
958 return -ENXIO;
959 }
960
961 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
962 if (IS_ERR(i2s->clk)) {
963 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
964 iounmap(i2s->addr);
965 return -ENOENT;
966 }
967 clk_prepare_enable(i2s->clk);
968
969 samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
970
971 if (other) {
972 other->addr = i2s->addr;
973 other->clk = i2s->clk;
974 }
975
976 if (i2s->quirks & QUIRK_NEED_RSTCLR)
977 writel(CON_RSTCLR, i2s->addr + I2SCON);
978
979 if (i2s->quirks & QUIRK_SEC_DAI)
980 idma_reg_addr_init(i2s->addr,
981 i2s->sec_dai->idma_playback.dma_addr);
982
983 probe_exit:
984 /* Reset any constraint on RFS and BFS */
985 i2s->rfs = 0;
986 i2s->bfs = 0;
987 i2s_txctrl(i2s, 0);
988 i2s_rxctrl(i2s, 0);
989 i2s_fifo(i2s, FIC_TXFLUSH);
990 i2s_fifo(other, FIC_TXFLUSH);
991 i2s_fifo(i2s, FIC_RXFLUSH);
992
993 /* Gate CDCLK by default */
994 if (!is_opened(other))
995 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
996 0, SND_SOC_CLOCK_IN);
997
998 return 0;
999 }
1000
1001 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1002 {
1003 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
1004 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
1005
1006 if (!other || !other->clk) {
1007
1008 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1009 writel(0, i2s->addr + I2SCON);
1010
1011 clk_disable_unprepare(i2s->clk);
1012 clk_put(i2s->clk);
1013
1014 iounmap(i2s->addr);
1015 }
1016
1017 i2s->clk = NULL;
1018
1019 return 0;
1020 }
1021
1022 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1023 .trigger = i2s_trigger,
1024 .hw_params = i2s_hw_params,
1025 .set_fmt = i2s_set_fmt,
1026 .set_clkdiv = i2s_set_clkdiv,
1027 .set_sysclk = i2s_set_sysclk,
1028 .startup = i2s_startup,
1029 .shutdown = i2s_shutdown,
1030 .delay = i2s_delay,
1031 };
1032
1033 static const struct snd_soc_component_driver samsung_i2s_component = {
1034 .name = "samsung-i2s",
1035 };
1036
1037 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
1038
1039 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1040 SNDRV_PCM_FMTBIT_S16_LE | \
1041 SNDRV_PCM_FMTBIT_S24_LE)
1042
1043 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
1044 {
1045 struct i2s_dai *i2s;
1046 int ret;
1047
1048 i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
1049 if (i2s == NULL)
1050 return NULL;
1051
1052 i2s->pdev = pdev;
1053 i2s->pri_dai = NULL;
1054 i2s->sec_dai = NULL;
1055 i2s->i2s_dai_drv.symmetric_rates = 1;
1056 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
1057 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
1058 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
1059 i2s->i2s_dai_drv.suspend = i2s_suspend;
1060 i2s->i2s_dai_drv.resume = i2s_resume;
1061 i2s->i2s_dai_drv.playback.channels_min = 1;
1062 i2s->i2s_dai_drv.playback.channels_max = 2;
1063 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
1064 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
1065
1066 if (!sec) {
1067 i2s->i2s_dai_drv.capture.channels_min = 1;
1068 i2s->i2s_dai_drv.capture.channels_max = 2;
1069 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
1070 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1071 dev_set_drvdata(&i2s->pdev->dev, i2s);
1072 } else { /* Create a new platform_device for Secondary */
1073 i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1);
1074 if (!i2s->pdev)
1075 return NULL;
1076
1077 i2s->pdev->dev.parent = &pdev->dev;
1078
1079 platform_set_drvdata(i2s->pdev, i2s);
1080 ret = platform_device_add(i2s->pdev);
1081 if (ret < 0)
1082 return NULL;
1083 }
1084
1085 return i2s;
1086 }
1087
1088 static const struct of_device_id exynos_i2s_match[];
1089
1090 static inline const struct samsung_i2s_dai_data *samsung_i2s_get_driver_data(
1091 struct platform_device *pdev)
1092 {
1093 #ifdef CONFIG_OF
1094 if (pdev->dev.of_node) {
1095 const struct of_device_id *match;
1096 match = of_match_node(exynos_i2s_match, pdev->dev.of_node);
1097 return match->data;
1098 } else
1099 #endif
1100 return (struct samsung_i2s_dai_data *)
1101 platform_get_device_id(pdev)->driver_data;
1102 }
1103
1104 #ifdef CONFIG_PM_RUNTIME
1105 static int i2s_runtime_suspend(struct device *dev)
1106 {
1107 struct i2s_dai *i2s = dev_get_drvdata(dev);
1108
1109 clk_disable_unprepare(i2s->clk);
1110
1111 return 0;
1112 }
1113
1114 static int i2s_runtime_resume(struct device *dev)
1115 {
1116 struct i2s_dai *i2s = dev_get_drvdata(dev);
1117
1118 clk_prepare_enable(i2s->clk);
1119
1120 return 0;
1121 }
1122 #endif /* CONFIG_PM_RUNTIME */
1123
1124 static int samsung_i2s_probe(struct platform_device *pdev)
1125 {
1126 struct i2s_dai *pri_dai, *sec_dai = NULL;
1127 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1128 struct samsung_i2s *i2s_cfg = NULL;
1129 struct resource *res;
1130 u32 regs_base, quirks = 0, idma_addr = 0;
1131 struct device_node *np = pdev->dev.of_node;
1132 const struct samsung_i2s_dai_data *i2s_dai_data;
1133 int ret = 0;
1134
1135 /* Call during Seconday interface registration */
1136 i2s_dai_data = samsung_i2s_get_driver_data(pdev);
1137
1138 if (i2s_dai_data->dai_type == TYPE_SEC) {
1139 sec_dai = dev_get_drvdata(&pdev->dev);
1140 if (!sec_dai) {
1141 dev_err(&pdev->dev, "Unable to get drvdata\n");
1142 return -EFAULT;
1143 }
1144 devm_snd_soc_register_component(&sec_dai->pdev->dev,
1145 &samsung_i2s_component,
1146 &sec_dai->i2s_dai_drv, 1);
1147 samsung_asoc_dma_platform_register(&pdev->dev);
1148 return 0;
1149 }
1150
1151 pri_dai = i2s_alloc_dai(pdev, false);
1152 if (!pri_dai) {
1153 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1154 return -ENOMEM;
1155 }
1156
1157 if (!np) {
1158 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1159 if (!res) {
1160 dev_err(&pdev->dev,
1161 "Unable to get I2S-TX dma resource\n");
1162 return -ENXIO;
1163 }
1164 pri_dai->dma_playback.channel = res->start;
1165
1166 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1167 if (!res) {
1168 dev_err(&pdev->dev,
1169 "Unable to get I2S-RX dma resource\n");
1170 return -ENXIO;
1171 }
1172 pri_dai->dma_capture.channel = res->start;
1173
1174 if (i2s_pdata == NULL) {
1175 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1176 return -EINVAL;
1177 }
1178
1179 if (&i2s_pdata->type)
1180 i2s_cfg = &i2s_pdata->type.i2s;
1181
1182 if (i2s_cfg) {
1183 quirks = i2s_cfg->quirks;
1184 idma_addr = i2s_cfg->idma_addr;
1185 }
1186 } else {
1187 quirks = i2s_dai_data->quirks;
1188 if (of_property_read_u32(np, "samsung,idma-addr",
1189 &idma_addr)) {
1190 if (quirks & QUIRK_SEC_DAI) {
1191 dev_err(&pdev->dev, "idma address is not"\
1192 "specified");
1193 return -EINVAL;
1194 }
1195 }
1196 }
1197
1198 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1199 if (!res) {
1200 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1201 return -ENXIO;
1202 }
1203
1204 if (!request_mem_region(res->start, resource_size(res),
1205 "samsung-i2s")) {
1206 dev_err(&pdev->dev, "Unable to request SFR region\n");
1207 return -EBUSY;
1208 }
1209 regs_base = res->start;
1210
1211 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1212 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1213 pri_dai->dma_playback.client =
1214 (struct s3c_dma_client *)&pri_dai->dma_playback;
1215 pri_dai->dma_playback.ch_name = "tx";
1216 pri_dai->dma_capture.client =
1217 (struct s3c_dma_client *)&pri_dai->dma_capture;
1218 pri_dai->dma_capture.ch_name = "rx";
1219 pri_dai->dma_playback.dma_size = 4;
1220 pri_dai->dma_capture.dma_size = 4;
1221 pri_dai->base = regs_base;
1222 pri_dai->quirks = quirks;
1223
1224 if (quirks & QUIRK_PRI_6CHAN)
1225 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1226
1227 if (quirks & QUIRK_SEC_DAI) {
1228 sec_dai = i2s_alloc_dai(pdev, true);
1229 if (!sec_dai) {
1230 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1231 ret = -ENOMEM;
1232 goto err;
1233 }
1234 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1235 sec_dai->dma_playback.client =
1236 (struct s3c_dma_client *)&sec_dai->dma_playback;
1237 sec_dai->dma_playback.ch_name = "tx-sec";
1238
1239 if (!np) {
1240 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1241 if (res)
1242 sec_dai->dma_playback.channel = res->start;
1243 }
1244
1245 sec_dai->dma_playback.dma_size = 4;
1246 sec_dai->base = regs_base;
1247 sec_dai->quirks = quirks;
1248 sec_dai->idma_playback.dma_addr = idma_addr;
1249 sec_dai->pri_dai = pri_dai;
1250 pri_dai->sec_dai = sec_dai;
1251 }
1252
1253 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1254 dev_err(&pdev->dev, "Unable to configure gpio\n");
1255 ret = -EINVAL;
1256 goto err;
1257 }
1258
1259 devm_snd_soc_register_component(&pri_dai->pdev->dev,
1260 &samsung_i2s_component,
1261 &pri_dai->i2s_dai_drv, 1);
1262
1263 pm_runtime_enable(&pdev->dev);
1264
1265 samsung_asoc_dma_platform_register(&pdev->dev);
1266
1267 return 0;
1268 err:
1269 if (res)
1270 release_mem_region(regs_base, resource_size(res));
1271
1272 return ret;
1273 }
1274
1275 static int samsung_i2s_remove(struct platform_device *pdev)
1276 {
1277 struct i2s_dai *i2s, *other;
1278 struct resource *res;
1279
1280 i2s = dev_get_drvdata(&pdev->dev);
1281 other = i2s->pri_dai ? : i2s->sec_dai;
1282
1283 if (other) {
1284 other->pri_dai = NULL;
1285 other->sec_dai = NULL;
1286 } else {
1287 pm_runtime_disable(&pdev->dev);
1288 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1289 if (res)
1290 release_mem_region(res->start, resource_size(res));
1291 }
1292
1293 i2s->pri_dai = NULL;
1294 i2s->sec_dai = NULL;
1295
1296 samsung_asoc_dma_platform_unregister(&pdev->dev);
1297
1298 return 0;
1299 }
1300
1301 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1302 .dai_type = TYPE_PRI,
1303 .quirks = QUIRK_NO_MUXPSR,
1304 };
1305
1306 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1307 .dai_type = TYPE_PRI,
1308 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR,
1309 };
1310
1311 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1312 .dai_type = TYPE_PRI,
1313 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1314 QUIRK_SUPPORTS_TDM,
1315 };
1316
1317 static const struct samsung_i2s_dai_data samsung_dai_type_pri = {
1318 .dai_type = TYPE_PRI,
1319 };
1320
1321 static const struct samsung_i2s_dai_data samsung_dai_type_sec = {
1322 .dai_type = TYPE_SEC,
1323 };
1324
1325 static struct platform_device_id samsung_i2s_driver_ids[] = {
1326 {
1327 .name = "samsung-i2s",
1328 .driver_data = (kernel_ulong_t)&samsung_dai_type_pri,
1329 }, {
1330 .name = "samsung-i2s-sec",
1331 .driver_data = (kernel_ulong_t)&samsung_dai_type_sec,
1332 },
1333 {},
1334 };
1335 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1336
1337 #ifdef CONFIG_OF
1338 static const struct of_device_id exynos_i2s_match[] = {
1339 {
1340 .compatible = "samsung,s3c6410-i2s",
1341 .data = &i2sv3_dai_type,
1342 }, {
1343 .compatible = "samsung,s5pv210-i2s",
1344 .data = &i2sv5_dai_type,
1345 }, {
1346 .compatible = "samsung,exynos5420-i2s",
1347 .data = &i2sv6_dai_type,
1348 },
1349 {},
1350 };
1351 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1352 #endif
1353
1354 static const struct dev_pm_ops samsung_i2s_pm = {
1355 SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1356 i2s_runtime_resume, NULL)
1357 };
1358
1359 static struct platform_driver samsung_i2s_driver = {
1360 .probe = samsung_i2s_probe,
1361 .remove = samsung_i2s_remove,
1362 .id_table = samsung_i2s_driver_ids,
1363 .driver = {
1364 .name = "samsung-i2s",
1365 .owner = THIS_MODULE,
1366 .of_match_table = of_match_ptr(exynos_i2s_match),
1367 .pm = &samsung_i2s_pm,
1368 },
1369 };
1370
1371 module_platform_driver(samsung_i2s_driver);
1372
1373 /* Module information */
1374 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1375 MODULE_DESCRIPTION("Samsung I2S Interface");
1376 MODULE_ALIAS("platform:samsung-i2s");
1377 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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