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Merge tag 'v3.13' into for-3.15
[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 <mach/dma.h>
26
27 #include <linux/platform_data/asoc-s3c.h>
28
29 #include "dma.h"
30 #include "idma.h"
31 #include "i2s.h"
32 #include "i2s-regs.h"
33
34 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
35
36 enum samsung_dai_type {
37 TYPE_PRI,
38 TYPE_SEC,
39 };
40
41 struct samsung_i2s_dai_data {
42 int dai_type;
43 u32 quirks;
44 };
45
46 struct i2s_dai {
47 /* Platform device for this DAI */
48 struct platform_device *pdev;
49 /* IOREMAP'd SFRs */
50 void __iomem *addr;
51 /* Physical base address of SFRs */
52 u32 base;
53 /* Rate of RCLK source clock */
54 unsigned long rclk_srcrate;
55 /* Frame Clock */
56 unsigned frmclk;
57 /*
58 * Specifically requested RCLK,BCLK by MACHINE Driver.
59 * 0 indicates CPU driver is free to choose any value.
60 */
61 unsigned rfs, bfs;
62 /* I2S Controller's core clock */
63 struct clk *clk;
64 /* Clock for generating I2S signals */
65 struct clk *op_clk;
66 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
67 struct i2s_dai *pri_dai;
68 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
69 struct i2s_dai *sec_dai;
70 #define DAI_OPENED (1 << 0) /* Dai is opened */
71 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
72 unsigned mode;
73 /* Driver for this DAI */
74 struct snd_soc_dai_driver i2s_dai_drv;
75 /* DMA parameters */
76 struct s3c_dma_params dma_playback;
77 struct s3c_dma_params dma_capture;
78 struct s3c_dma_params idma_playback;
79 u32 quirks;
80 u32 suspend_i2smod;
81 u32 suspend_i2scon;
82 u32 suspend_i2spsr;
83 unsigned long gpios[7]; /* i2s gpio line numbers */
84 };
85
86 /* Lock for cross i/f checks */
87 static DEFINE_SPINLOCK(lock);
88
89 /* If this is the 'overlay' stereo DAI */
90 static inline bool is_secondary(struct i2s_dai *i2s)
91 {
92 return i2s->pri_dai ? true : false;
93 }
94
95 /* If operating in SoC-Slave mode */
96 static inline bool is_slave(struct i2s_dai *i2s)
97 {
98 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
99 }
100
101 /* If this interface of the controller is transmitting data */
102 static inline bool tx_active(struct i2s_dai *i2s)
103 {
104 u32 active;
105
106 if (!i2s)
107 return false;
108
109 active = readl(i2s->addr + I2SCON);
110
111 if (is_secondary(i2s))
112 active &= CON_TXSDMA_ACTIVE;
113 else
114 active &= CON_TXDMA_ACTIVE;
115
116 return active ? true : false;
117 }
118
119 /* If the other interface of the controller is transmitting data */
120 static inline bool other_tx_active(struct i2s_dai *i2s)
121 {
122 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
123
124 return tx_active(other);
125 }
126
127 /* If any interface of the controller is transmitting data */
128 static inline bool any_tx_active(struct i2s_dai *i2s)
129 {
130 return tx_active(i2s) || other_tx_active(i2s);
131 }
132
133 /* If this interface of the controller is receiving data */
134 static inline bool rx_active(struct i2s_dai *i2s)
135 {
136 u32 active;
137
138 if (!i2s)
139 return false;
140
141 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
142
143 return active ? true : false;
144 }
145
146 /* If the other interface of the controller is receiving data */
147 static inline bool other_rx_active(struct i2s_dai *i2s)
148 {
149 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
150
151 return rx_active(other);
152 }
153
154 /* If any interface of the controller is receiving data */
155 static inline bool any_rx_active(struct i2s_dai *i2s)
156 {
157 return rx_active(i2s) || other_rx_active(i2s);
158 }
159
160 /* If the other DAI is transmitting or receiving data */
161 static inline bool other_active(struct i2s_dai *i2s)
162 {
163 return other_rx_active(i2s) || other_tx_active(i2s);
164 }
165
166 /* If this DAI is transmitting or receiving data */
167 static inline bool this_active(struct i2s_dai *i2s)
168 {
169 return tx_active(i2s) || rx_active(i2s);
170 }
171
172 /* If the controller is active anyway */
173 static inline bool any_active(struct i2s_dai *i2s)
174 {
175 return this_active(i2s) || other_active(i2s);
176 }
177
178 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
179 {
180 return snd_soc_dai_get_drvdata(dai);
181 }
182
183 static inline bool is_opened(struct i2s_dai *i2s)
184 {
185 if (i2s && (i2s->mode & DAI_OPENED))
186 return true;
187 else
188 return false;
189 }
190
191 static inline bool is_manager(struct i2s_dai *i2s)
192 {
193 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
194 return true;
195 else
196 return false;
197 }
198
199 /* Read RCLK of I2S (in multiples of LRCLK) */
200 static inline unsigned get_rfs(struct i2s_dai *i2s)
201 {
202 u32 rfs;
203
204 if (i2s->quirks & QUIRK_SUPPORTS_TDM)
205 rfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_RCLK_SHIFT;
206 else
207 rfs = (readl(i2s->addr + I2SMOD) >> MOD_RCLK_SHIFT);
208 rfs &= MOD_RCLK_MASK;
209
210 switch (rfs) {
211 case 3: return 768;
212 case 2: return 384;
213 case 1: return 512;
214 default: return 256;
215 }
216 }
217
218 /* Write RCLK of I2S (in multiples of LRCLK) */
219 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
220 {
221 u32 mod = readl(i2s->addr + I2SMOD);
222 int rfs_shift;
223
224 if (i2s->quirks & QUIRK_SUPPORTS_TDM)
225 rfs_shift = EXYNOS5420_MOD_RCLK_SHIFT;
226 else
227 rfs_shift = MOD_RCLK_SHIFT;
228 mod &= ~(MOD_RCLK_MASK << rfs_shift);
229
230 switch (rfs) {
231 case 768:
232 mod |= (MOD_RCLK_768FS << rfs_shift);
233 break;
234 case 512:
235 mod |= (MOD_RCLK_512FS << rfs_shift);
236 break;
237 case 384:
238 mod |= (MOD_RCLK_384FS << rfs_shift);
239 break;
240 default:
241 mod |= (MOD_RCLK_256FS << rfs_shift);
242 break;
243 }
244
245 writel(mod, i2s->addr + I2SMOD);
246 }
247
248 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
249 static inline unsigned get_bfs(struct i2s_dai *i2s)
250 {
251 u32 bfs;
252
253 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
254 bfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_BCLK_SHIFT;
255 bfs &= EXYNOS5420_MOD_BCLK_MASK;
256 } else {
257 bfs = readl(i2s->addr + I2SMOD) >> MOD_BCLK_SHIFT;
258 bfs &= MOD_BCLK_MASK;
259 }
260
261 switch (bfs) {
262 case 8: return 256;
263 case 7: return 192;
264 case 6: return 128;
265 case 5: return 96;
266 case 4: return 64;
267 case 3: return 24;
268 case 2: return 16;
269 case 1: return 48;
270 default: return 32;
271 }
272 }
273
274 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
275 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
276 {
277 u32 mod = readl(i2s->addr + I2SMOD);
278 int bfs_shift;
279 int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM;
280
281 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
282 bfs_shift = EXYNOS5420_MOD_BCLK_SHIFT;
283 mod &= ~(EXYNOS5420_MOD_BCLK_MASK << bfs_shift);
284 } else {
285 bfs_shift = MOD_BCLK_SHIFT;
286 mod &= ~(MOD_BCLK_MASK << bfs_shift);
287 }
288
289 /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
290 if (!tdm && bfs > 48) {
291 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
292 return;
293 }
294
295 switch (bfs) {
296 case 48:
297 mod |= (MOD_BCLK_48FS << bfs_shift);
298 break;
299 case 32:
300 mod |= (MOD_BCLK_32FS << bfs_shift);
301 break;
302 case 24:
303 mod |= (MOD_BCLK_24FS << bfs_shift);
304 break;
305 case 16:
306 mod |= (MOD_BCLK_16FS << bfs_shift);
307 break;
308 case 64:
309 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
310 break;
311 case 96:
312 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
313 break;
314 case 128:
315 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
316 break;
317 case 192:
318 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
319 break;
320 case 256:
321 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
322 break;
323 default:
324 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
325 return;
326 }
327
328 writel(mod, i2s->addr + I2SMOD);
329 }
330
331 /* Sample-Size */
332 static inline int get_blc(struct i2s_dai *i2s)
333 {
334 int blc = readl(i2s->addr + I2SMOD);
335
336 blc = (blc >> 13) & 0x3;
337
338 switch (blc) {
339 case 2: return 24;
340 case 1: return 8;
341 default: return 16;
342 }
343 }
344
345 /* TX Channel Control */
346 static void i2s_txctrl(struct i2s_dai *i2s, int on)
347 {
348 void __iomem *addr = i2s->addr;
349 u32 con = readl(addr + I2SCON);
350 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
351
352 if (on) {
353 con |= CON_ACTIVE;
354 con &= ~CON_TXCH_PAUSE;
355
356 if (is_secondary(i2s)) {
357 con |= CON_TXSDMA_ACTIVE;
358 con &= ~CON_TXSDMA_PAUSE;
359 } else {
360 con |= CON_TXDMA_ACTIVE;
361 con &= ~CON_TXDMA_PAUSE;
362 }
363
364 if (any_rx_active(i2s))
365 mod |= MOD_TXRX;
366 else
367 mod |= MOD_TXONLY;
368 } else {
369 if (is_secondary(i2s)) {
370 con |= CON_TXSDMA_PAUSE;
371 con &= ~CON_TXSDMA_ACTIVE;
372 } else {
373 con |= CON_TXDMA_PAUSE;
374 con &= ~CON_TXDMA_ACTIVE;
375 }
376
377 if (other_tx_active(i2s)) {
378 writel(con, addr + I2SCON);
379 return;
380 }
381
382 con |= CON_TXCH_PAUSE;
383
384 if (any_rx_active(i2s))
385 mod |= MOD_RXONLY;
386 else
387 con &= ~CON_ACTIVE;
388 }
389
390 writel(mod, addr + I2SMOD);
391 writel(con, addr + I2SCON);
392 }
393
394 /* RX Channel Control */
395 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
396 {
397 void __iomem *addr = i2s->addr;
398 u32 con = readl(addr + I2SCON);
399 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
400
401 if (on) {
402 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
403 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
404
405 if (any_tx_active(i2s))
406 mod |= MOD_TXRX;
407 else
408 mod |= MOD_RXONLY;
409 } else {
410 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
411 con &= ~CON_RXDMA_ACTIVE;
412
413 if (any_tx_active(i2s))
414 mod |= MOD_TXONLY;
415 else
416 con &= ~CON_ACTIVE;
417 }
418
419 writel(mod, addr + I2SMOD);
420 writel(con, addr + I2SCON);
421 }
422
423 /* Flush FIFO of an interface */
424 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
425 {
426 void __iomem *fic;
427 u32 val;
428
429 if (!i2s)
430 return;
431
432 if (is_secondary(i2s))
433 fic = i2s->addr + I2SFICS;
434 else
435 fic = i2s->addr + I2SFIC;
436
437 /* Flush the FIFO */
438 writel(readl(fic) | flush, fic);
439
440 /* Be patient */
441 val = msecs_to_loops(1) / 1000; /* 1 usec */
442 while (--val)
443 cpu_relax();
444
445 writel(readl(fic) & ~flush, fic);
446 }
447
448 static int i2s_set_sysclk(struct snd_soc_dai *dai,
449 int clk_id, unsigned int rfs, int dir)
450 {
451 struct i2s_dai *i2s = to_info(dai);
452 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
453 u32 mod = readl(i2s->addr + I2SMOD);
454
455 switch (clk_id) {
456 case SAMSUNG_I2S_CDCLK:
457 /* Shouldn't matter in GATING(CLOCK_IN) mode */
458 if (dir == SND_SOC_CLOCK_IN)
459 rfs = 0;
460
461 if ((rfs && other->rfs && (other->rfs != rfs)) ||
462 (any_active(i2s) &&
463 (((dir == SND_SOC_CLOCK_IN)
464 && !(mod & MOD_CDCLKCON)) ||
465 ((dir == SND_SOC_CLOCK_OUT)
466 && (mod & MOD_CDCLKCON))))) {
467 dev_err(&i2s->pdev->dev,
468 "%s:%d Other DAI busy\n", __func__, __LINE__);
469 return -EAGAIN;
470 }
471
472 if (dir == SND_SOC_CLOCK_IN)
473 mod |= MOD_CDCLKCON;
474 else
475 mod &= ~MOD_CDCLKCON;
476
477 i2s->rfs = rfs;
478 break;
479
480 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
481 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
482 if ((i2s->quirks & QUIRK_NO_MUXPSR)
483 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
484 clk_id = 0;
485 else
486 clk_id = 1;
487
488 if (!any_active(i2s)) {
489 if (i2s->op_clk) {
490 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
491 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
492 clk_disable_unprepare(i2s->op_clk);
493 clk_put(i2s->op_clk);
494 } else {
495 i2s->rclk_srcrate =
496 clk_get_rate(i2s->op_clk);
497 return 0;
498 }
499 }
500
501 if (clk_id)
502 i2s->op_clk = clk_get(&i2s->pdev->dev,
503 "i2s_opclk1");
504 else
505 i2s->op_clk = clk_get(&i2s->pdev->dev,
506 "i2s_opclk0");
507 clk_prepare_enable(i2s->op_clk);
508 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
509
510 /* Over-ride the other's */
511 if (other) {
512 other->op_clk = i2s->op_clk;
513 other->rclk_srcrate = i2s->rclk_srcrate;
514 }
515 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
516 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
517 dev_err(&i2s->pdev->dev,
518 "%s:%d Other DAI busy\n", __func__, __LINE__);
519 return -EAGAIN;
520 } else {
521 /* Call can't be on the active DAI */
522 i2s->op_clk = other->op_clk;
523 i2s->rclk_srcrate = other->rclk_srcrate;
524 return 0;
525 }
526
527 if (clk_id == 0)
528 mod &= ~MOD_IMS_SYSMUX;
529 else
530 mod |= MOD_IMS_SYSMUX;
531 break;
532
533 default:
534 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
535 return -EINVAL;
536 }
537
538 writel(mod, i2s->addr + I2SMOD);
539
540 return 0;
541 }
542
543 static int i2s_set_fmt(struct snd_soc_dai *dai,
544 unsigned int fmt)
545 {
546 struct i2s_dai *i2s = to_info(dai);
547 u32 mod = readl(i2s->addr + I2SMOD);
548 int lrp_shift, sdf_shift, sdf_mask, lrp_rlow;
549 u32 tmp = 0;
550
551 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
552 lrp_shift = EXYNOS5420_MOD_LRP_SHIFT;
553 sdf_shift = EXYNOS5420_MOD_SDF_SHIFT;
554 } else {
555 lrp_shift = MOD_LRP_SHIFT;
556 sdf_shift = MOD_SDF_SHIFT;
557 }
558
559 sdf_mask = MOD_SDF_MASK << sdf_shift;
560 lrp_rlow = MOD_LR_RLOW << lrp_shift;
561
562 /* Format is priority */
563 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
564 case SND_SOC_DAIFMT_RIGHT_J:
565 tmp |= lrp_rlow;
566 tmp |= (MOD_SDF_MSB << sdf_shift);
567 break;
568 case SND_SOC_DAIFMT_LEFT_J:
569 tmp |= lrp_rlow;
570 tmp |= (MOD_SDF_LSB << sdf_shift);
571 break;
572 case SND_SOC_DAIFMT_I2S:
573 tmp |= (MOD_SDF_IIS << sdf_shift);
574 break;
575 default:
576 dev_err(&i2s->pdev->dev, "Format not supported\n");
577 return -EINVAL;
578 }
579
580 /*
581 * INV flag is relative to the FORMAT flag - if set it simply
582 * flips the polarity specified by the Standard
583 */
584 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
585 case SND_SOC_DAIFMT_NB_NF:
586 break;
587 case SND_SOC_DAIFMT_NB_IF:
588 if (tmp & lrp_rlow)
589 tmp &= ~lrp_rlow;
590 else
591 tmp |= lrp_rlow;
592 break;
593 default:
594 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
595 return -EINVAL;
596 }
597
598 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
599 case SND_SOC_DAIFMT_CBM_CFM:
600 tmp |= MOD_SLAVE;
601 break;
602 case SND_SOC_DAIFMT_CBS_CFS:
603 /* Set default source clock in Master mode */
604 if (i2s->rclk_srcrate == 0)
605 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
606 0, SND_SOC_CLOCK_IN);
607 break;
608 default:
609 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
610 return -EINVAL;
611 }
612
613 /*
614 * Don't change the I2S mode if any controller is active on this
615 * channel.
616 */
617 if (any_active(i2s) &&
618 ((mod & (sdf_mask | lrp_rlow | MOD_SLAVE)) != tmp)) {
619 dev_err(&i2s->pdev->dev,
620 "%s:%d Other DAI busy\n", __func__, __LINE__);
621 return -EAGAIN;
622 }
623
624 mod &= ~(sdf_mask | lrp_rlow | MOD_SLAVE);
625 mod |= tmp;
626 writel(mod, i2s->addr + I2SMOD);
627
628 return 0;
629 }
630
631 static int i2s_hw_params(struct snd_pcm_substream *substream,
632 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
633 {
634 struct i2s_dai *i2s = to_info(dai);
635 u32 mod = readl(i2s->addr + I2SMOD);
636
637 if (!is_secondary(i2s))
638 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
639
640 switch (params_channels(params)) {
641 case 6:
642 mod |= MOD_DC2_EN;
643 case 4:
644 mod |= MOD_DC1_EN;
645 break;
646 case 2:
647 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
648 i2s->dma_playback.dma_size = 4;
649 else
650 i2s->dma_capture.dma_size = 4;
651 break;
652 case 1:
653 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
654 i2s->dma_playback.dma_size = 2;
655 else
656 i2s->dma_capture.dma_size = 2;
657
658 break;
659 default:
660 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
661 params_channels(params));
662 return -EINVAL;
663 }
664
665 if (is_secondary(i2s))
666 mod &= ~MOD_BLCS_MASK;
667 else
668 mod &= ~MOD_BLCP_MASK;
669
670 if (is_manager(i2s))
671 mod &= ~MOD_BLC_MASK;
672
673 switch (params_format(params)) {
674 case SNDRV_PCM_FORMAT_S8:
675 if (is_secondary(i2s))
676 mod |= MOD_BLCS_8BIT;
677 else
678 mod |= MOD_BLCP_8BIT;
679 if (is_manager(i2s))
680 mod |= MOD_BLC_8BIT;
681 break;
682 case SNDRV_PCM_FORMAT_S16_LE:
683 if (is_secondary(i2s))
684 mod |= MOD_BLCS_16BIT;
685 else
686 mod |= MOD_BLCP_16BIT;
687 if (is_manager(i2s))
688 mod |= MOD_BLC_16BIT;
689 break;
690 case SNDRV_PCM_FORMAT_S24_LE:
691 if (is_secondary(i2s))
692 mod |= MOD_BLCS_24BIT;
693 else
694 mod |= MOD_BLCP_24BIT;
695 if (is_manager(i2s))
696 mod |= MOD_BLC_24BIT;
697 break;
698 default:
699 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
700 params_format(params));
701 return -EINVAL;
702 }
703 writel(mod, i2s->addr + I2SMOD);
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 goto probe_exit;
951
952 i2s->addr = ioremap(i2s->base, 0x100);
953 if (i2s->addr == NULL) {
954 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
955 return -ENXIO;
956 }
957
958 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
959 if (IS_ERR(i2s->clk)) {
960 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
961 iounmap(i2s->addr);
962 return -ENOENT;
963 }
964 clk_prepare_enable(i2s->clk);
965
966 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
967
968 if (other) {
969 other->addr = i2s->addr;
970 other->clk = i2s->clk;
971 }
972
973 if (i2s->quirks & QUIRK_NEED_RSTCLR)
974 writel(CON_RSTCLR, i2s->addr + I2SCON);
975
976 if (i2s->quirks & QUIRK_SEC_DAI)
977 idma_reg_addr_init(i2s->addr,
978 i2s->sec_dai->idma_playback.dma_addr);
979
980 probe_exit:
981 /* Reset any constraint on RFS and BFS */
982 i2s->rfs = 0;
983 i2s->bfs = 0;
984 i2s_txctrl(i2s, 0);
985 i2s_rxctrl(i2s, 0);
986 i2s_fifo(i2s, FIC_TXFLUSH);
987 i2s_fifo(other, FIC_TXFLUSH);
988 i2s_fifo(i2s, FIC_RXFLUSH);
989
990 /* Gate CDCLK by default */
991 if (!is_opened(other))
992 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
993 0, SND_SOC_CLOCK_IN);
994
995 return 0;
996 }
997
998 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
999 {
1000 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
1001 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
1002
1003 if (!other || !other->clk) {
1004
1005 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1006 writel(0, i2s->addr + I2SCON);
1007
1008 clk_disable_unprepare(i2s->clk);
1009 clk_put(i2s->clk);
1010
1011 iounmap(i2s->addr);
1012 }
1013
1014 i2s->clk = NULL;
1015
1016 return 0;
1017 }
1018
1019 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1020 .trigger = i2s_trigger,
1021 .hw_params = i2s_hw_params,
1022 .set_fmt = i2s_set_fmt,
1023 .set_clkdiv = i2s_set_clkdiv,
1024 .set_sysclk = i2s_set_sysclk,
1025 .startup = i2s_startup,
1026 .shutdown = i2s_shutdown,
1027 .delay = i2s_delay,
1028 };
1029
1030 static const struct snd_soc_component_driver samsung_i2s_component = {
1031 .name = "samsung-i2s",
1032 };
1033
1034 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
1035
1036 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1037 SNDRV_PCM_FMTBIT_S16_LE | \
1038 SNDRV_PCM_FMTBIT_S24_LE)
1039
1040 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
1041 {
1042 struct i2s_dai *i2s;
1043 int ret;
1044
1045 i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
1046 if (i2s == NULL)
1047 return NULL;
1048
1049 i2s->pdev = pdev;
1050 i2s->pri_dai = NULL;
1051 i2s->sec_dai = NULL;
1052 i2s->i2s_dai_drv.symmetric_rates = 1;
1053 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
1054 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
1055 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
1056 i2s->i2s_dai_drv.suspend = i2s_suspend;
1057 i2s->i2s_dai_drv.resume = i2s_resume;
1058 i2s->i2s_dai_drv.playback.channels_min = 1;
1059 i2s->i2s_dai_drv.playback.channels_max = 2;
1060 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
1061 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
1062
1063 if (!sec) {
1064 i2s->i2s_dai_drv.capture.channels_min = 1;
1065 i2s->i2s_dai_drv.capture.channels_max = 2;
1066 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
1067 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1068 dev_set_drvdata(&i2s->pdev->dev, i2s);
1069 } else { /* Create a new platform_device for Secondary */
1070 i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1);
1071 if (!i2s->pdev)
1072 return NULL;
1073
1074 i2s->pdev->dev.parent = &pdev->dev;
1075
1076 platform_set_drvdata(i2s->pdev, i2s);
1077 ret = platform_device_add(i2s->pdev);
1078 if (ret < 0)
1079 return NULL;
1080 }
1081
1082 return i2s;
1083 }
1084
1085 static const struct of_device_id exynos_i2s_match[];
1086
1087 static inline const struct samsung_i2s_dai_data *samsung_i2s_get_driver_data(
1088 struct platform_device *pdev)
1089 {
1090 #ifdef CONFIG_OF
1091 if (pdev->dev.of_node) {
1092 const struct of_device_id *match;
1093 match = of_match_node(exynos_i2s_match, pdev->dev.of_node);
1094 return match->data;
1095 } else
1096 #endif
1097 return (struct samsung_i2s_dai_data *)
1098 platform_get_device_id(pdev)->driver_data;
1099 }
1100
1101 #ifdef CONFIG_PM_RUNTIME
1102 static int i2s_runtime_suspend(struct device *dev)
1103 {
1104 struct i2s_dai *i2s = dev_get_drvdata(dev);
1105
1106 clk_disable_unprepare(i2s->clk);
1107
1108 return 0;
1109 }
1110
1111 static int i2s_runtime_resume(struct device *dev)
1112 {
1113 struct i2s_dai *i2s = dev_get_drvdata(dev);
1114
1115 clk_prepare_enable(i2s->clk);
1116
1117 return 0;
1118 }
1119 #endif /* CONFIG_PM_RUNTIME */
1120
1121 static int samsung_i2s_probe(struct platform_device *pdev)
1122 {
1123 struct i2s_dai *pri_dai, *sec_dai = NULL;
1124 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1125 struct samsung_i2s *i2s_cfg = NULL;
1126 struct resource *res;
1127 u32 regs_base, quirks = 0, idma_addr = 0;
1128 struct device_node *np = pdev->dev.of_node;
1129 const struct samsung_i2s_dai_data *i2s_dai_data;
1130 int ret = 0;
1131
1132 /* Call during Seconday interface registration */
1133 i2s_dai_data = samsung_i2s_get_driver_data(pdev);
1134
1135 if (i2s_dai_data->dai_type == TYPE_SEC) {
1136 sec_dai = dev_get_drvdata(&pdev->dev);
1137 if (!sec_dai) {
1138 dev_err(&pdev->dev, "Unable to get drvdata\n");
1139 return -EFAULT;
1140 }
1141 devm_snd_soc_register_component(&sec_dai->pdev->dev,
1142 &samsung_i2s_component,
1143 &sec_dai->i2s_dai_drv, 1);
1144 samsung_asoc_dma_platform_register(&pdev->dev);
1145 return 0;
1146 }
1147
1148 pri_dai = i2s_alloc_dai(pdev, false);
1149 if (!pri_dai) {
1150 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1151 return -ENOMEM;
1152 }
1153
1154 if (!np) {
1155 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1156 if (!res) {
1157 dev_err(&pdev->dev,
1158 "Unable to get I2S-TX dma resource\n");
1159 return -ENXIO;
1160 }
1161 pri_dai->dma_playback.channel = res->start;
1162
1163 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1164 if (!res) {
1165 dev_err(&pdev->dev,
1166 "Unable to get I2S-RX dma resource\n");
1167 return -ENXIO;
1168 }
1169 pri_dai->dma_capture.channel = res->start;
1170
1171 if (i2s_pdata == NULL) {
1172 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1173 return -EINVAL;
1174 }
1175
1176 if (&i2s_pdata->type)
1177 i2s_cfg = &i2s_pdata->type.i2s;
1178
1179 if (i2s_cfg) {
1180 quirks = i2s_cfg->quirks;
1181 idma_addr = i2s_cfg->idma_addr;
1182 }
1183 } else {
1184 quirks = i2s_dai_data->quirks;
1185 if (of_property_read_u32(np, "samsung,idma-addr",
1186 &idma_addr)) {
1187 if (quirks & QUIRK_SEC_DAI) {
1188 dev_err(&pdev->dev, "idma address is not"\
1189 "specified");
1190 return -EINVAL;
1191 }
1192 }
1193 }
1194
1195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1196 if (!res) {
1197 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1198 return -ENXIO;
1199 }
1200
1201 if (!request_mem_region(res->start, resource_size(res),
1202 "samsung-i2s")) {
1203 dev_err(&pdev->dev, "Unable to request SFR region\n");
1204 return -EBUSY;
1205 }
1206 regs_base = res->start;
1207
1208 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1209 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1210 pri_dai->dma_playback.client =
1211 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1212 pri_dai->dma_playback.ch_name = "tx";
1213 pri_dai->dma_capture.client =
1214 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1215 pri_dai->dma_capture.ch_name = "rx";
1216 pri_dai->dma_playback.dma_size = 4;
1217 pri_dai->dma_capture.dma_size = 4;
1218 pri_dai->base = regs_base;
1219 pri_dai->quirks = quirks;
1220
1221 if (quirks & QUIRK_PRI_6CHAN)
1222 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1223
1224 if (quirks & QUIRK_SEC_DAI) {
1225 sec_dai = i2s_alloc_dai(pdev, true);
1226 if (!sec_dai) {
1227 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1228 ret = -ENOMEM;
1229 goto err;
1230 }
1231 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1232 sec_dai->dma_playback.client =
1233 (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1234 sec_dai->dma_playback.ch_name = "tx-sec";
1235
1236 if (!np) {
1237 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1238 if (res)
1239 sec_dai->dma_playback.channel = res->start;
1240 }
1241
1242 sec_dai->dma_playback.dma_size = 4;
1243 sec_dai->base = regs_base;
1244 sec_dai->quirks = quirks;
1245 sec_dai->idma_playback.dma_addr = idma_addr;
1246 sec_dai->pri_dai = pri_dai;
1247 pri_dai->sec_dai = sec_dai;
1248 }
1249
1250 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1251 dev_err(&pdev->dev, "Unable to configure gpio\n");
1252 ret = -EINVAL;
1253 goto err;
1254 }
1255
1256 devm_snd_soc_register_component(&pri_dai->pdev->dev,
1257 &samsung_i2s_component,
1258 &pri_dai->i2s_dai_drv, 1);
1259
1260 pm_runtime_enable(&pdev->dev);
1261
1262 samsung_asoc_dma_platform_register(&pdev->dev);
1263
1264 return 0;
1265 err:
1266 release_mem_region(regs_base, resource_size(res));
1267
1268 return ret;
1269 }
1270
1271 static int samsung_i2s_remove(struct platform_device *pdev)
1272 {
1273 struct i2s_dai *i2s, *other;
1274 struct resource *res;
1275
1276 i2s = dev_get_drvdata(&pdev->dev);
1277 other = i2s->pri_dai ? : i2s->sec_dai;
1278
1279 if (other) {
1280 other->pri_dai = NULL;
1281 other->sec_dai = NULL;
1282 } else {
1283 pm_runtime_disable(&pdev->dev);
1284 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1285 if (res)
1286 release_mem_region(res->start, resource_size(res));
1287 }
1288
1289 i2s->pri_dai = NULL;
1290 i2s->sec_dai = NULL;
1291
1292 samsung_asoc_dma_platform_unregister(&pdev->dev);
1293
1294 return 0;
1295 }
1296
1297 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1298 .dai_type = TYPE_PRI,
1299 .quirks = QUIRK_NO_MUXPSR,
1300 };
1301
1302 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1303 .dai_type = TYPE_PRI,
1304 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR,
1305 };
1306
1307 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1308 .dai_type = TYPE_PRI,
1309 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1310 QUIRK_SUPPORTS_TDM,
1311 };
1312
1313 static const struct samsung_i2s_dai_data samsung_dai_type_pri = {
1314 .dai_type = TYPE_PRI,
1315 };
1316
1317 static const struct samsung_i2s_dai_data samsung_dai_type_sec = {
1318 .dai_type = TYPE_SEC,
1319 };
1320
1321 static struct platform_device_id samsung_i2s_driver_ids[] = {
1322 {
1323 .name = "samsung-i2s",
1324 .driver_data = (kernel_ulong_t)&samsung_dai_type_pri,
1325 }, {
1326 .name = "samsung-i2s-sec",
1327 .driver_data = (kernel_ulong_t)&samsung_dai_type_sec,
1328 },
1329 {},
1330 };
1331 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1332
1333 #ifdef CONFIG_OF
1334 static const struct of_device_id exynos_i2s_match[] = {
1335 {
1336 .compatible = "samsung,s3c6410-i2s",
1337 .data = &i2sv3_dai_type,
1338 }, {
1339 .compatible = "samsung,s5pv210-i2s",
1340 .data = &i2sv5_dai_type,
1341 }, {
1342 .compatible = "samsung,exynos5420-i2s",
1343 .data = &i2sv6_dai_type,
1344 },
1345 {},
1346 };
1347 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1348 #endif
1349
1350 static const struct dev_pm_ops samsung_i2s_pm = {
1351 SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1352 i2s_runtime_resume, NULL)
1353 };
1354
1355 static struct platform_driver samsung_i2s_driver = {
1356 .probe = samsung_i2s_probe,
1357 .remove = samsung_i2s_remove,
1358 .id_table = samsung_i2s_driver_ids,
1359 .driver = {
1360 .name = "samsung-i2s",
1361 .owner = THIS_MODULE,
1362 .of_match_table = of_match_ptr(exynos_i2s_match),
1363 .pm = &samsung_i2s_pm,
1364 },
1365 };
1366
1367 module_platform_driver(samsung_i2s_driver);
1368
1369 /* Module information */
1370 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1371 MODULE_DESCRIPTION("Samsung I2S Interface");
1372 MODULE_ALIAS("platform:samsung-i2s");
1373 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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