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ASoC: samsung: drop owner assignment from platform_drivers
[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 /* CDCLK pin direction: 0 - input, 1 - output */
72 unsigned int cdclk_out:1;
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_OPCLK:
457 mod &= ~MOD_OPCLK_MASK;
458 mod |= dir;
459 break;
460 case SAMSUNG_I2S_CDCLK:
461 /* Shouldn't matter in GATING(CLOCK_IN) mode */
462 if (dir == SND_SOC_CLOCK_IN)
463 rfs = 0;
464
465 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
466 (any_active(i2s) &&
467 (((dir == SND_SOC_CLOCK_IN)
468 && !(mod & MOD_CDCLKCON)) ||
469 ((dir == SND_SOC_CLOCK_OUT)
470 && (mod & MOD_CDCLKCON))))) {
471 dev_err(&i2s->pdev->dev,
472 "%s:%d Other DAI busy\n", __func__, __LINE__);
473 return -EAGAIN;
474 }
475
476 if (dir == SND_SOC_CLOCK_IN)
477 mod |= MOD_CDCLKCON;
478 else
479 mod &= ~MOD_CDCLKCON;
480
481 i2s->rfs = rfs;
482 break;
483
484 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
485 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
486 if ((i2s->quirks & QUIRK_NO_MUXPSR)
487 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
488 clk_id = 0;
489 else
490 clk_id = 1;
491
492 if (!any_active(i2s)) {
493 if (i2s->op_clk && !IS_ERR(i2s->op_clk)) {
494 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
495 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
496 clk_disable_unprepare(i2s->op_clk);
497 clk_put(i2s->op_clk);
498 } else {
499 i2s->rclk_srcrate =
500 clk_get_rate(i2s->op_clk);
501 return 0;
502 }
503 }
504
505 if (clk_id)
506 i2s->op_clk = clk_get(&i2s->pdev->dev,
507 "i2s_opclk1");
508 else
509 i2s->op_clk = clk_get(&i2s->pdev->dev,
510 "i2s_opclk0");
511
512 if (WARN_ON(IS_ERR(i2s->op_clk)))
513 return PTR_ERR(i2s->op_clk);
514
515 clk_prepare_enable(i2s->op_clk);
516 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
517
518 /* Over-ride the other's */
519 if (other) {
520 other->op_clk = i2s->op_clk;
521 other->rclk_srcrate = i2s->rclk_srcrate;
522 }
523 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
524 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
525 dev_err(&i2s->pdev->dev,
526 "%s:%d Other DAI busy\n", __func__, __LINE__);
527 return -EAGAIN;
528 } else {
529 /* Call can't be on the active DAI */
530 i2s->op_clk = other->op_clk;
531 i2s->rclk_srcrate = other->rclk_srcrate;
532 return 0;
533 }
534
535 if (clk_id == 0)
536 mod &= ~MOD_IMS_SYSMUX;
537 else
538 mod |= MOD_IMS_SYSMUX;
539 break;
540
541 default:
542 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
543 return -EINVAL;
544 }
545
546 writel(mod, i2s->addr + I2SMOD);
547
548 return 0;
549 }
550
551 static int i2s_set_fmt(struct snd_soc_dai *dai,
552 unsigned int fmt)
553 {
554 struct i2s_dai *i2s = to_info(dai);
555 u32 mod = readl(i2s->addr + I2SMOD);
556 int lrp_shift, sdf_shift, sdf_mask, lrp_rlow;
557 u32 tmp = 0;
558
559 if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
560 lrp_shift = EXYNOS5420_MOD_LRP_SHIFT;
561 sdf_shift = EXYNOS5420_MOD_SDF_SHIFT;
562 } else {
563 lrp_shift = MOD_LRP_SHIFT;
564 sdf_shift = MOD_SDF_SHIFT;
565 }
566
567 sdf_mask = MOD_SDF_MASK << sdf_shift;
568 lrp_rlow = MOD_LR_RLOW << lrp_shift;
569
570 /* Format is priority */
571 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
572 case SND_SOC_DAIFMT_RIGHT_J:
573 tmp |= lrp_rlow;
574 tmp |= (MOD_SDF_MSB << sdf_shift);
575 break;
576 case SND_SOC_DAIFMT_LEFT_J:
577 tmp |= lrp_rlow;
578 tmp |= (MOD_SDF_LSB << sdf_shift);
579 break;
580 case SND_SOC_DAIFMT_I2S:
581 tmp |= (MOD_SDF_IIS << sdf_shift);
582 break;
583 default:
584 dev_err(&i2s->pdev->dev, "Format not supported\n");
585 return -EINVAL;
586 }
587
588 /*
589 * INV flag is relative to the FORMAT flag - if set it simply
590 * flips the polarity specified by the Standard
591 */
592 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
593 case SND_SOC_DAIFMT_NB_NF:
594 break;
595 case SND_SOC_DAIFMT_NB_IF:
596 if (tmp & lrp_rlow)
597 tmp &= ~lrp_rlow;
598 else
599 tmp |= lrp_rlow;
600 break;
601 default:
602 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
603 return -EINVAL;
604 }
605
606 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
607 case SND_SOC_DAIFMT_CBM_CFM:
608 tmp |= MOD_SLAVE;
609 break;
610 case SND_SOC_DAIFMT_CBS_CFS:
611 /* Set default source clock in Master mode */
612 if (i2s->rclk_srcrate == 0)
613 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
614 0, SND_SOC_CLOCK_IN);
615 break;
616 default:
617 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
618 return -EINVAL;
619 }
620
621 /*
622 * Don't change the I2S mode if any controller is active on this
623 * channel.
624 */
625 if (any_active(i2s) &&
626 ((mod & (sdf_mask | lrp_rlow | MOD_SLAVE)) != tmp)) {
627 dev_err(&i2s->pdev->dev,
628 "%s:%d Other DAI busy\n", __func__, __LINE__);
629 return -EAGAIN;
630 }
631
632 mod &= ~(sdf_mask | lrp_rlow | MOD_SLAVE);
633 mod |= tmp;
634 writel(mod, i2s->addr + I2SMOD);
635
636 return 0;
637 }
638
639 static int i2s_hw_params(struct snd_pcm_substream *substream,
640 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
641 {
642 struct i2s_dai *i2s = to_info(dai);
643 u32 mod = readl(i2s->addr + I2SMOD);
644
645 if (!is_secondary(i2s))
646 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
647
648 switch (params_channels(params)) {
649 case 6:
650 mod |= MOD_DC2_EN;
651 case 4:
652 mod |= MOD_DC1_EN;
653 break;
654 case 2:
655 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
656 i2s->dma_playback.dma_size = 4;
657 else
658 i2s->dma_capture.dma_size = 4;
659 break;
660 case 1:
661 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
662 i2s->dma_playback.dma_size = 2;
663 else
664 i2s->dma_capture.dma_size = 2;
665
666 break;
667 default:
668 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
669 params_channels(params));
670 return -EINVAL;
671 }
672
673 if (is_secondary(i2s))
674 mod &= ~MOD_BLCS_MASK;
675 else
676 mod &= ~MOD_BLCP_MASK;
677
678 if (is_manager(i2s))
679 mod &= ~MOD_BLC_MASK;
680
681 switch (params_width(params)) {
682 case 8:
683 if (is_secondary(i2s))
684 mod |= MOD_BLCS_8BIT;
685 else
686 mod |= MOD_BLCP_8BIT;
687 if (is_manager(i2s))
688 mod |= MOD_BLC_8BIT;
689 break;
690 case 16:
691 if (is_secondary(i2s))
692 mod |= MOD_BLCS_16BIT;
693 else
694 mod |= MOD_BLCP_16BIT;
695 if (is_manager(i2s))
696 mod |= MOD_BLC_16BIT;
697 break;
698 case 24:
699 if (is_secondary(i2s))
700 mod |= MOD_BLCS_24BIT;
701 else
702 mod |= MOD_BLCP_24BIT;
703 if (is_manager(i2s))
704 mod |= MOD_BLC_24BIT;
705 break;
706 default:
707 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
708 params_format(params));
709 return -EINVAL;
710 }
711 writel(mod, i2s->addr + I2SMOD);
712
713 samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
714
715 i2s->frmclk = params_rate(params);
716
717 return 0;
718 }
719
720 /* We set constraints on the substream acc to the version of I2S */
721 static int i2s_startup(struct snd_pcm_substream *substream,
722 struct snd_soc_dai *dai)
723 {
724 struct i2s_dai *i2s = to_info(dai);
725 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
726 unsigned long flags;
727
728 spin_lock_irqsave(&lock, flags);
729
730 i2s->mode |= DAI_OPENED;
731
732 if (is_manager(other))
733 i2s->mode &= ~DAI_MANAGER;
734 else
735 i2s->mode |= DAI_MANAGER;
736
737 if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR))
738 writel(CON_RSTCLR, i2s->addr + I2SCON);
739
740 spin_unlock_irqrestore(&lock, flags);
741
742 if (!is_opened(other) && i2s->cdclk_out)
743 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
744 0, SND_SOC_CLOCK_OUT);
745 return 0;
746 }
747
748 static void i2s_shutdown(struct snd_pcm_substream *substream,
749 struct snd_soc_dai *dai)
750 {
751 struct i2s_dai *i2s = to_info(dai);
752 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
753 unsigned long flags;
754
755 spin_lock_irqsave(&lock, flags);
756
757 i2s->mode &= ~DAI_OPENED;
758 i2s->mode &= ~DAI_MANAGER;
759
760 if (is_opened(other)) {
761 other->mode |= DAI_MANAGER;
762 } else {
763 u32 mod = readl(i2s->addr + I2SMOD);
764 i2s->cdclk_out = !(mod & MOD_CDCLKCON);
765 if (other)
766 other->cdclk_out = i2s->cdclk_out;
767 }
768 /* Reset any constraint on RFS and BFS */
769 i2s->rfs = 0;
770 i2s->bfs = 0;
771
772 spin_unlock_irqrestore(&lock, flags);
773
774 /* Gate CDCLK by default */
775 if (!is_opened(other))
776 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
777 0, SND_SOC_CLOCK_IN);
778 }
779
780 static int config_setup(struct i2s_dai *i2s)
781 {
782 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
783 unsigned rfs, bfs, blc;
784 u32 psr;
785
786 blc = get_blc(i2s);
787
788 bfs = i2s->bfs;
789
790 if (!bfs && other)
791 bfs = other->bfs;
792
793 /* Select least possible multiple(2) if no constraint set */
794 if (!bfs)
795 bfs = blc * 2;
796
797 rfs = i2s->rfs;
798
799 if (!rfs && other)
800 rfs = other->rfs;
801
802 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
803 dev_err(&i2s->pdev->dev,
804 "%d-RFS not supported for 24-blc\n", rfs);
805 return -EINVAL;
806 }
807
808 if (!rfs) {
809 if (bfs == 16 || bfs == 32)
810 rfs = 256;
811 else
812 rfs = 384;
813 }
814
815 /* If already setup and running */
816 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
817 dev_err(&i2s->pdev->dev,
818 "%s:%d Other DAI busy\n", __func__, __LINE__);
819 return -EAGAIN;
820 }
821
822 set_bfs(i2s, bfs);
823 set_rfs(i2s, rfs);
824
825 /* Don't bother with PSR in Slave mode */
826 if (is_slave(i2s))
827 return 0;
828
829 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
830 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
831 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
832 dev_dbg(&i2s->pdev->dev,
833 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
834 i2s->rclk_srcrate, psr, rfs, bfs);
835 }
836
837 return 0;
838 }
839
840 static int i2s_trigger(struct snd_pcm_substream *substream,
841 int cmd, struct snd_soc_dai *dai)
842 {
843 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
844 struct snd_soc_pcm_runtime *rtd = substream->private_data;
845 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
846 unsigned long flags;
847
848 switch (cmd) {
849 case SNDRV_PCM_TRIGGER_START:
850 case SNDRV_PCM_TRIGGER_RESUME:
851 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
852 local_irq_save(flags);
853
854 if (config_setup(i2s)) {
855 local_irq_restore(flags);
856 return -EINVAL;
857 }
858
859 if (capture)
860 i2s_rxctrl(i2s, 1);
861 else
862 i2s_txctrl(i2s, 1);
863
864 local_irq_restore(flags);
865 break;
866 case SNDRV_PCM_TRIGGER_STOP:
867 case SNDRV_PCM_TRIGGER_SUSPEND:
868 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
869 local_irq_save(flags);
870
871 if (capture) {
872 i2s_rxctrl(i2s, 0);
873 i2s_fifo(i2s, FIC_RXFLUSH);
874 } else {
875 i2s_txctrl(i2s, 0);
876 i2s_fifo(i2s, FIC_TXFLUSH);
877 }
878
879 local_irq_restore(flags);
880 break;
881 }
882
883 return 0;
884 }
885
886 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
887 int div_id, int div)
888 {
889 struct i2s_dai *i2s = to_info(dai);
890 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
891
892 switch (div_id) {
893 case SAMSUNG_I2S_DIV_BCLK:
894 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
895 || (other && other->bfs && (other->bfs != div))) {
896 dev_err(&i2s->pdev->dev,
897 "%s:%d Other DAI busy\n", __func__, __LINE__);
898 return -EAGAIN;
899 }
900 i2s->bfs = div;
901 break;
902 default:
903 dev_err(&i2s->pdev->dev,
904 "Invalid clock divider(%d)\n", div_id);
905 return -EINVAL;
906 }
907
908 return 0;
909 }
910
911 static snd_pcm_sframes_t
912 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
913 {
914 struct i2s_dai *i2s = to_info(dai);
915 u32 reg = readl(i2s->addr + I2SFIC);
916 snd_pcm_sframes_t delay;
917
918 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
919 delay = FIC_RXCOUNT(reg);
920 else if (is_secondary(i2s))
921 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
922 else
923 delay = FIC_TXCOUNT(reg);
924
925 return delay;
926 }
927
928 #ifdef CONFIG_PM
929 static int i2s_suspend(struct snd_soc_dai *dai)
930 {
931 struct i2s_dai *i2s = to_info(dai);
932
933 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
934 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
935 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
936
937 return 0;
938 }
939
940 static int i2s_resume(struct snd_soc_dai *dai)
941 {
942 struct i2s_dai *i2s = to_info(dai);
943
944 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
945 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
946 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
947
948 return 0;
949 }
950 #else
951 #define i2s_suspend NULL
952 #define i2s_resume NULL
953 #endif
954
955 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
956 {
957 struct i2s_dai *i2s = to_info(dai);
958 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
959
960 if (other && other->clk) { /* If this is probe on secondary */
961 samsung_asoc_init_dma_data(dai, &other->sec_dai->dma_playback,
962 NULL);
963 goto probe_exit;
964 }
965
966 i2s->addr = ioremap(i2s->base, 0x100);
967 if (i2s->addr == NULL) {
968 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
969 return -ENXIO;
970 }
971
972 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
973 if (IS_ERR(i2s->clk)) {
974 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
975 iounmap(i2s->addr);
976 return -ENOENT;
977 }
978 clk_prepare_enable(i2s->clk);
979
980 samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
981
982 if (other) {
983 other->addr = i2s->addr;
984 other->clk = i2s->clk;
985 }
986
987 if (i2s->quirks & QUIRK_NEED_RSTCLR)
988 writel(CON_RSTCLR, i2s->addr + I2SCON);
989
990 if (i2s->quirks & QUIRK_SEC_DAI)
991 idma_reg_addr_init(i2s->addr,
992 i2s->sec_dai->idma_playback.dma_addr);
993
994 probe_exit:
995 /* Reset any constraint on RFS and BFS */
996 i2s->rfs = 0;
997 i2s->bfs = 0;
998 i2s->rclk_srcrate = 0;
999 i2s_txctrl(i2s, 0);
1000 i2s_rxctrl(i2s, 0);
1001 i2s_fifo(i2s, FIC_TXFLUSH);
1002 i2s_fifo(other, FIC_TXFLUSH);
1003 i2s_fifo(i2s, FIC_RXFLUSH);
1004
1005 /* Gate CDCLK by default */
1006 if (!is_opened(other))
1007 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1008 0, SND_SOC_CLOCK_IN);
1009
1010 return 0;
1011 }
1012
1013 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1014 {
1015 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
1016 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
1017
1018 if (!other || !other->clk) {
1019
1020 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1021 writel(0, i2s->addr + I2SCON);
1022
1023 clk_disable_unprepare(i2s->clk);
1024 clk_put(i2s->clk);
1025
1026 iounmap(i2s->addr);
1027 }
1028
1029 i2s->clk = NULL;
1030
1031 return 0;
1032 }
1033
1034 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1035 .trigger = i2s_trigger,
1036 .hw_params = i2s_hw_params,
1037 .set_fmt = i2s_set_fmt,
1038 .set_clkdiv = i2s_set_clkdiv,
1039 .set_sysclk = i2s_set_sysclk,
1040 .startup = i2s_startup,
1041 .shutdown = i2s_shutdown,
1042 .delay = i2s_delay,
1043 };
1044
1045 static const struct snd_soc_component_driver samsung_i2s_component = {
1046 .name = "samsung-i2s",
1047 };
1048
1049 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
1050
1051 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1052 SNDRV_PCM_FMTBIT_S16_LE | \
1053 SNDRV_PCM_FMTBIT_S24_LE)
1054
1055 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
1056 {
1057 struct i2s_dai *i2s;
1058 int ret;
1059
1060 i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
1061 if (i2s == NULL)
1062 return NULL;
1063
1064 i2s->pdev = pdev;
1065 i2s->pri_dai = NULL;
1066 i2s->sec_dai = NULL;
1067 i2s->i2s_dai_drv.symmetric_rates = 1;
1068 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
1069 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
1070 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
1071 i2s->i2s_dai_drv.suspend = i2s_suspend;
1072 i2s->i2s_dai_drv.resume = i2s_resume;
1073 i2s->i2s_dai_drv.playback.channels_min = 1;
1074 i2s->i2s_dai_drv.playback.channels_max = 2;
1075 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
1076 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
1077
1078 if (!sec) {
1079 i2s->i2s_dai_drv.capture.channels_min = 1;
1080 i2s->i2s_dai_drv.capture.channels_max = 2;
1081 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
1082 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1083 dev_set_drvdata(&i2s->pdev->dev, i2s);
1084 } else { /* Create a new platform_device for Secondary */
1085 i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1);
1086 if (!i2s->pdev)
1087 return NULL;
1088
1089 i2s->pdev->dev.parent = &pdev->dev;
1090
1091 platform_set_drvdata(i2s->pdev, i2s);
1092 ret = platform_device_add(i2s->pdev);
1093 if (ret < 0)
1094 return NULL;
1095 }
1096
1097 return i2s;
1098 }
1099
1100 static const struct of_device_id exynos_i2s_match[];
1101
1102 static inline const struct samsung_i2s_dai_data *samsung_i2s_get_driver_data(
1103 struct platform_device *pdev)
1104 {
1105 #ifdef CONFIG_OF
1106 if (pdev->dev.of_node) {
1107 const struct of_device_id *match;
1108 match = of_match_node(exynos_i2s_match, pdev->dev.of_node);
1109 return match->data;
1110 } else
1111 #endif
1112 return (struct samsung_i2s_dai_data *)
1113 platform_get_device_id(pdev)->driver_data;
1114 }
1115
1116 #ifdef CONFIG_PM_RUNTIME
1117 static int i2s_runtime_suspend(struct device *dev)
1118 {
1119 struct i2s_dai *i2s = dev_get_drvdata(dev);
1120
1121 clk_disable_unprepare(i2s->clk);
1122
1123 return 0;
1124 }
1125
1126 static int i2s_runtime_resume(struct device *dev)
1127 {
1128 struct i2s_dai *i2s = dev_get_drvdata(dev);
1129
1130 clk_prepare_enable(i2s->clk);
1131
1132 return 0;
1133 }
1134 #endif /* CONFIG_PM_RUNTIME */
1135
1136 static int samsung_i2s_probe(struct platform_device *pdev)
1137 {
1138 struct i2s_dai *pri_dai, *sec_dai = NULL;
1139 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1140 struct samsung_i2s *i2s_cfg = NULL;
1141 struct resource *res;
1142 u32 regs_base, quirks = 0, idma_addr = 0;
1143 struct device_node *np = pdev->dev.of_node;
1144 const struct samsung_i2s_dai_data *i2s_dai_data;
1145 int ret = 0;
1146
1147 /* Call during Seconday interface registration */
1148 i2s_dai_data = samsung_i2s_get_driver_data(pdev);
1149
1150 if (i2s_dai_data->dai_type == TYPE_SEC) {
1151 sec_dai = dev_get_drvdata(&pdev->dev);
1152 if (!sec_dai) {
1153 dev_err(&pdev->dev, "Unable to get drvdata\n");
1154 return -EFAULT;
1155 }
1156 devm_snd_soc_register_component(&sec_dai->pdev->dev,
1157 &samsung_i2s_component,
1158 &sec_dai->i2s_dai_drv, 1);
1159 samsung_asoc_dma_platform_register(&pdev->dev);
1160 return 0;
1161 }
1162
1163 pri_dai = i2s_alloc_dai(pdev, false);
1164 if (!pri_dai) {
1165 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1166 return -ENOMEM;
1167 }
1168
1169 if (!np) {
1170 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1171 if (!res) {
1172 dev_err(&pdev->dev,
1173 "Unable to get I2S-TX dma resource\n");
1174 return -ENXIO;
1175 }
1176 pri_dai->dma_playback.channel = res->start;
1177
1178 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1179 if (!res) {
1180 dev_err(&pdev->dev,
1181 "Unable to get I2S-RX dma resource\n");
1182 return -ENXIO;
1183 }
1184 pri_dai->dma_capture.channel = res->start;
1185
1186 if (i2s_pdata == NULL) {
1187 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1188 return -EINVAL;
1189 }
1190
1191 if (&i2s_pdata->type)
1192 i2s_cfg = &i2s_pdata->type.i2s;
1193
1194 if (i2s_cfg) {
1195 quirks = i2s_cfg->quirks;
1196 idma_addr = i2s_cfg->idma_addr;
1197 }
1198 } else {
1199 quirks = i2s_dai_data->quirks;
1200 if (of_property_read_u32(np, "samsung,idma-addr",
1201 &idma_addr)) {
1202 if (quirks & QUIRK_SEC_DAI) {
1203 dev_err(&pdev->dev, "idma address is not"\
1204 "specified");
1205 return -EINVAL;
1206 }
1207 }
1208 }
1209
1210 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1211 if (!res) {
1212 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1213 return -ENXIO;
1214 }
1215
1216 if (!request_mem_region(res->start, resource_size(res),
1217 "samsung-i2s")) {
1218 dev_err(&pdev->dev, "Unable to request SFR region\n");
1219 return -EBUSY;
1220 }
1221 regs_base = res->start;
1222
1223 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1224 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1225 pri_dai->dma_playback.ch_name = "tx";
1226 pri_dai->dma_capture.ch_name = "rx";
1227 pri_dai->dma_playback.dma_size = 4;
1228 pri_dai->dma_capture.dma_size = 4;
1229 pri_dai->base = regs_base;
1230 pri_dai->quirks = quirks;
1231
1232 if (quirks & QUIRK_PRI_6CHAN)
1233 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1234
1235 if (quirks & QUIRK_SEC_DAI) {
1236 sec_dai = i2s_alloc_dai(pdev, true);
1237 if (!sec_dai) {
1238 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1239 ret = -ENOMEM;
1240 goto err;
1241 }
1242 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1243 sec_dai->dma_playback.ch_name = "tx-sec";
1244
1245 if (!np) {
1246 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1247 if (res)
1248 sec_dai->dma_playback.channel = res->start;
1249 }
1250
1251 sec_dai->dma_playback.dma_size = 4;
1252 sec_dai->base = regs_base;
1253 sec_dai->quirks = quirks;
1254 sec_dai->idma_playback.dma_addr = idma_addr;
1255 sec_dai->pri_dai = pri_dai;
1256 pri_dai->sec_dai = sec_dai;
1257 }
1258
1259 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1260 dev_err(&pdev->dev, "Unable to configure gpio\n");
1261 ret = -EINVAL;
1262 goto err;
1263 }
1264
1265 devm_snd_soc_register_component(&pri_dai->pdev->dev,
1266 &samsung_i2s_component,
1267 &pri_dai->i2s_dai_drv, 1);
1268
1269 pm_runtime_enable(&pdev->dev);
1270
1271 samsung_asoc_dma_platform_register(&pdev->dev);
1272
1273 return 0;
1274 err:
1275 if (res)
1276 release_mem_region(regs_base, resource_size(res));
1277
1278 return ret;
1279 }
1280
1281 static int samsung_i2s_remove(struct platform_device *pdev)
1282 {
1283 struct i2s_dai *i2s, *other;
1284 struct resource *res;
1285
1286 i2s = dev_get_drvdata(&pdev->dev);
1287 other = i2s->pri_dai ? : i2s->sec_dai;
1288
1289 if (other) {
1290 other->pri_dai = NULL;
1291 other->sec_dai = NULL;
1292 } else {
1293 pm_runtime_disable(&pdev->dev);
1294 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1295 if (res)
1296 release_mem_region(res->start, resource_size(res));
1297 }
1298
1299 i2s->pri_dai = NULL;
1300 i2s->sec_dai = NULL;
1301
1302 return 0;
1303 }
1304
1305 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1306 .dai_type = TYPE_PRI,
1307 .quirks = QUIRK_NO_MUXPSR,
1308 };
1309
1310 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1311 .dai_type = TYPE_PRI,
1312 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR,
1313 };
1314
1315 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1316 .dai_type = TYPE_PRI,
1317 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1318 QUIRK_SUPPORTS_TDM,
1319 };
1320
1321 static const struct samsung_i2s_dai_data samsung_dai_type_pri = {
1322 .dai_type = TYPE_PRI,
1323 };
1324
1325 static const struct samsung_i2s_dai_data samsung_dai_type_sec = {
1326 .dai_type = TYPE_SEC,
1327 };
1328
1329 static struct platform_device_id samsung_i2s_driver_ids[] = {
1330 {
1331 .name = "samsung-i2s",
1332 .driver_data = (kernel_ulong_t)&samsung_dai_type_pri,
1333 }, {
1334 .name = "samsung-i2s-sec",
1335 .driver_data = (kernel_ulong_t)&samsung_dai_type_sec,
1336 },
1337 {},
1338 };
1339 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1340
1341 #ifdef CONFIG_OF
1342 static const struct of_device_id exynos_i2s_match[] = {
1343 {
1344 .compatible = "samsung,s3c6410-i2s",
1345 .data = &i2sv3_dai_type,
1346 }, {
1347 .compatible = "samsung,s5pv210-i2s",
1348 .data = &i2sv5_dai_type,
1349 }, {
1350 .compatible = "samsung,exynos5420-i2s",
1351 .data = &i2sv6_dai_type,
1352 },
1353 {},
1354 };
1355 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1356 #endif
1357
1358 static const struct dev_pm_ops samsung_i2s_pm = {
1359 SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1360 i2s_runtime_resume, NULL)
1361 };
1362
1363 static struct platform_driver samsung_i2s_driver = {
1364 .probe = samsung_i2s_probe,
1365 .remove = samsung_i2s_remove,
1366 .id_table = samsung_i2s_driver_ids,
1367 .driver = {
1368 .name = "samsung-i2s",
1369 .of_match_table = of_match_ptr(exynos_i2s_match),
1370 .pm = &samsung_i2s_pm,
1371 },
1372 };
1373
1374 module_platform_driver(samsung_i2s_driver);
1375
1376 /* Module information */
1377 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1378 MODULE_DESCRIPTION("Samsung I2S Interface");
1379 MODULE_ALIAS("platform:samsung-i2s");
1380 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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