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ASoC: SAMSUNG: Add WM8994 PCM Machine driver
[deliverable/linux.git] / sound / soc / samsung / i2s.c
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5033f43c 1/* sound/soc/samsung/i2s.c
1c7ac018
JB		 2 *
3 * ALSA SoC Audio Layer - Samsung I2S Controller driver
4 *
5 * Copyright (c) 2010 Samsung Electronics Co. Ltd.
6 * Jaswinder Singh <jassi.brar@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/delay.h>
14#include <linux/slab.h>
15#include <linux/clk.h>
16#include <linux/io.h>
17
1c7ac018 18#include <sound/soc.h>
0378b6ac 19#include <sound/pcm_params.h>
1c7ac018
JB		 20
21#include <plat/audio.h>
22
23#include "dma.h"
24#include "i2s.h"
25
26#define I2SCON 0x0
27#define I2SMOD 0x4
28#define I2SFIC 0x8
29#define I2SPSR 0xc
30#define I2STXD 0x10
31#define I2SRXD 0x14
32#define I2SFICS 0x18
33#define I2STXDS 0x1c
34
35#define CON_RSTCLR (1 << 31)
36#define CON_FRXOFSTATUS (1 << 26)
37#define CON_FRXORINTEN (1 << 25)
38#define CON_FTXSURSTAT (1 << 24)
39#define CON_FTXSURINTEN (1 << 23)
40#define CON_TXSDMA_PAUSE (1 << 20)
41#define CON_TXSDMA_ACTIVE (1 << 18)
42
43#define CON_FTXURSTATUS (1 << 17)
44#define CON_FTXURINTEN (1 << 16)
45#define CON_TXFIFO2_EMPTY (1 << 15)
46#define CON_TXFIFO1_EMPTY (1 << 14)
47#define CON_TXFIFO2_FULL (1 << 13)
48#define CON_TXFIFO1_FULL (1 << 12)
49
50#define CON_LRINDEX (1 << 11)
51#define CON_TXFIFO_EMPTY (1 << 10)
52#define CON_RXFIFO_EMPTY (1 << 9)
53#define CON_TXFIFO_FULL (1 << 8)
54#define CON_RXFIFO_FULL (1 << 7)
55#define CON_TXDMA_PAUSE (1 << 6)
56#define CON_RXDMA_PAUSE (1 << 5)
57#define CON_TXCH_PAUSE (1 << 4)
58#define CON_RXCH_PAUSE (1 << 3)
59#define CON_TXDMA_ACTIVE (1 << 2)
60#define CON_RXDMA_ACTIVE (1 << 1)
61#define CON_ACTIVE (1 << 0)
62
63#define MOD_OPCLK_CDCLK_OUT (0 << 30)
64#define MOD_OPCLK_CDCLK_IN (1 << 30)
65#define MOD_OPCLK_BCLK_OUT (2 << 30)
66#define MOD_OPCLK_PCLK (3 << 30)
67#define MOD_OPCLK_MASK (3 << 30)
68#define MOD_TXS_IDMA (1 << 28) /* Sec_TXFIFO use I-DMA */
69
70#define MOD_BLCS_SHIFT 26
71#define MOD_BLCS_16BIT (0 << MOD_BLCS_SHIFT)
72#define MOD_BLCS_8BIT (1 << MOD_BLCS_SHIFT)
73#define MOD_BLCS_24BIT (2 << MOD_BLCS_SHIFT)
74#define MOD_BLCS_MASK (3 << MOD_BLCS_SHIFT)
75#define MOD_BLCP_SHIFT 24
76#define MOD_BLCP_16BIT (0 << MOD_BLCP_SHIFT)
77#define MOD_BLCP_8BIT (1 << MOD_BLCP_SHIFT)
78#define MOD_BLCP_24BIT (2 << MOD_BLCP_SHIFT)
79#define MOD_BLCP_MASK (3 << MOD_BLCP_SHIFT)
80
81#define MOD_C2DD_HHALF (1 << 21) /* Discard Higher-half */
82#define MOD_C2DD_LHALF (1 << 20) /* Discard Lower-half */
83#define MOD_C1DD_HHALF (1 << 19)
84#define MOD_C1DD_LHALF (1 << 18)
85#define MOD_DC2_EN (1 << 17)
86#define MOD_DC1_EN (1 << 16)
87#define MOD_BLC_16BIT (0 << 13)
88#define MOD_BLC_8BIT (1 << 13)
89#define MOD_BLC_24BIT (2 << 13)
90#define MOD_BLC_MASK (3 << 13)
91
92#define MOD_IMS_SYSMUX (1 << 10)
93#define MOD_SLAVE (1 << 11)
94#define MOD_TXONLY (0 << 8)
95#define MOD_RXONLY (1 << 8)
96#define MOD_TXRX (2 << 8)
97#define MOD_MASK (3 << 8)
98#define MOD_LR_LLOW (0 << 7)
99#define MOD_LR_RLOW (1 << 7)
100#define MOD_SDF_IIS (0 << 5)
101#define MOD_SDF_MSB (1 << 5)
102#define MOD_SDF_LSB (2 << 5)
103#define MOD_SDF_MASK (3 << 5)
104#define MOD_RCLK_256FS (0 << 3)
105#define MOD_RCLK_512FS (1 << 3)
106#define MOD_RCLK_384FS (2 << 3)
107#define MOD_RCLK_768FS (3 << 3)
108#define MOD_RCLK_MASK (3 << 3)
109#define MOD_BCLK_32FS (0 << 1)
110#define MOD_BCLK_48FS (1 << 1)
111#define MOD_BCLK_16FS (2 << 1)
112#define MOD_BCLK_24FS (3 << 1)
113#define MOD_BCLK_MASK (3 << 1)
114#define MOD_8BIT (1 << 0)
115
116#define MOD_CDCLKCON (1 << 12)
117
118#define PSR_PSREN (1 << 15)
119
120#define FIC_TX2COUNT(x) (((x) >> 24) & 0xf)
121#define FIC_TX1COUNT(x) (((x) >> 16) & 0xf)
122
123#define FIC_TXFLUSH (1 << 15)
124#define FIC_RXFLUSH (1 << 7)
125#define FIC_TXCOUNT(x) (((x) >> 8) & 0xf)
126#define FIC_RXCOUNT(x) (((x) >> 0) & 0xf)
127#define FICS_TXCOUNT(x) (((x) >> 8) & 0x7f)
128
129#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
130
131struct i2s_dai {
132 /* Platform device for this DAI */
133 struct platform_device *pdev;
134 /* IOREMAP'd SFRs */
135 void __iomem *addr;
136 /* Physical base address of SFRs */
137 u32 base;
138 /* Rate of RCLK source clock */
139 unsigned long rclk_srcrate;
140 /* Frame Clock */
141 unsigned frmclk;
142 /*
143 * Specifically requested RCLK,BCLK by MACHINE Driver.
144 * 0 indicates CPU driver is free to choose any value.
145 */
146 unsigned rfs, bfs;
147 /* I2S Controller's core clock */
148 struct clk *clk;
149 /* Clock for generating I2S signals */
150 struct clk *op_clk;
151 /* Array of clock names for op_clk */
152 const char **src_clk;
153 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
154 struct i2s_dai *pri_dai;
155 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
156 struct i2s_dai *sec_dai;
157#define DAI_OPENED (1 << 0) /* Dai is opened */
158#define DAI_MANAGER (1 << 1) /* Dai is the manager */
159 unsigned mode;
160 /* Driver for this DAI */
161 struct snd_soc_dai_driver i2s_dai_drv;
162 /* DMA parameters */
163 struct s3c_dma_params dma_playback;
164 struct s3c_dma_params dma_capture;
165 u32 quirks;
166 u32 suspend_i2smod;
167 u32 suspend_i2scon;
168 u32 suspend_i2spsr;
169};
170
171/* Lock for cross i/f checks */
172static DEFINE_SPINLOCK(lock);
173
174/* If this is the 'overlay' stereo DAI */
175static inline bool is_secondary(struct i2s_dai *i2s)
176{
177 return i2s->pri_dai ? true : false;
178}
179
180/* If operating in SoC-Slave mode */
181static inline bool is_slave(struct i2s_dai *i2s)
182{
183 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
184}
185
186/* If this interface of the controller is transmitting data */
187static inline bool tx_active(struct i2s_dai *i2s)
188{
189 u32 active;
190
191 if (!i2s)
192 return false;
193
33195500 194 active = readl(i2s->addr + I2SCON);
1c7ac018
JB		 195
196 if (is_secondary(i2s))
197 active &= CON_TXSDMA_ACTIVE;
198 else
199 active &= CON_TXDMA_ACTIVE;
200
201 return active ? true : false;
202}
203
204/* If the other interface of the controller is transmitting data */
205static inline bool other_tx_active(struct i2s_dai *i2s)
206{
207 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
208
209 return tx_active(other);
210}
211
212/* If any interface of the controller is transmitting data */
213static inline bool any_tx_active(struct i2s_dai *i2s)
214{
215 return tx_active(i2s) || other_tx_active(i2s);
216}
217
218/* If this interface of the controller is receiving data */
219static inline bool rx_active(struct i2s_dai *i2s)
220{
221 u32 active;
222
223 if (!i2s)
224 return false;
225
33195500 226 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
1c7ac018
JB		 227
228 return active ? true : false;
229}
230
231/* If the other interface of the controller is receiving data */
232static inline bool other_rx_active(struct i2s_dai *i2s)
233{
234 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
235
236 return rx_active(other);
237}
238
239/* If any interface of the controller is receiving data */
240static inline bool any_rx_active(struct i2s_dai *i2s)
241{
242 return rx_active(i2s) || other_rx_active(i2s);
243}
244
245/* If the other DAI is transmitting or receiving data */
246static inline bool other_active(struct i2s_dai *i2s)
247{
248 return other_rx_active(i2s) || other_tx_active(i2s);
249}
250
251/* If this DAI is transmitting or receiving data */
252static inline bool this_active(struct i2s_dai *i2s)
253{
254 return tx_active(i2s) || rx_active(i2s);
255}
256
257/* If the controller is active anyway */
258static inline bool any_active(struct i2s_dai *i2s)
259{
260 return this_active(i2s) || other_active(i2s);
261}
262
263static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
264{
265 return snd_soc_dai_get_drvdata(dai);
266}
267
268static inline bool is_opened(struct i2s_dai *i2s)
269{
270 if (i2s && (i2s->mode & DAI_OPENED))
271 return true;
272 else
273 return false;
274}
275
276static inline bool is_manager(struct i2s_dai *i2s)
277{
278 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
279 return true;
280 else
281 return false;
282}
283
284/* Read RCLK of I2S (in multiples of LRCLK) */
285static inline unsigned get_rfs(struct i2s_dai *i2s)
286{
287 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
288
289 switch (rfs) {
290 case 3: return 768;
291 case 2: return 384;
292 case 1: return 512;
293 default: return 256;
294 }
295}
296
297/* Write RCLK of I2S (in multiples of LRCLK) */
298static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
299{
300 u32 mod = readl(i2s->addr + I2SMOD);
301
302 mod &= ~MOD_RCLK_MASK;
303
304 switch (rfs) {
305 case 768:
306 mod |= MOD_RCLK_768FS;
307 break;
308 case 512:
309 mod |= MOD_RCLK_512FS;
310 break;
311 case 384:
312 mod |= MOD_RCLK_384FS;
313 break;
314 default:
315 mod |= MOD_RCLK_256FS;
316 break;
317 }
318
319 writel(mod, i2s->addr + I2SMOD);
320}
321
322/* Read Bit-Clock of I2S (in multiples of LRCLK) */
323static inline unsigned get_bfs(struct i2s_dai *i2s)
324{
325 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
326
327 switch (bfs) {
328 case 3: return 24;
329 case 2: return 16;
330 case 1: return 48;
331 default: return 32;
332 }
333}
334
335/* Write Bit-Clock of I2S (in multiples of LRCLK) */
336static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
337{
338 u32 mod = readl(i2s->addr + I2SMOD);
339
340 mod &= ~MOD_BCLK_MASK;
341
342 switch (bfs) {
343 case 48:
344 mod |= MOD_BCLK_48FS;
345 break;
346 case 32:
347 mod |= MOD_BCLK_32FS;
348 break;
349 case 24:
350 mod |= MOD_BCLK_24FS;
351 break;
352 case 16:
353 mod |= MOD_BCLK_16FS;
354 break;
355 default:
356 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
357 return;
358 }
359
360 writel(mod, i2s->addr + I2SMOD);
361}
362
363/* Sample-Size */
364static inline int get_blc(struct i2s_dai *i2s)
365{
366 int blc = readl(i2s->addr + I2SMOD);
367
368 blc = (blc >> 13) & 0x3;
369
370 switch (blc) {
371 case 2: return 24;
372 case 1: return 8;
373 default: return 16;
374 }
375}
376
377/* TX Channel Control */
378static void i2s_txctrl(struct i2s_dai *i2s, int on)
379{
380 void __iomem *addr = i2s->addr;
381 u32 con = readl(addr + I2SCON);
382 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
383
384 if (on) {
385 con |= CON_ACTIVE;
386 con &= ~CON_TXCH_PAUSE;
387
388 if (is_secondary(i2s)) {
389 con |= CON_TXSDMA_ACTIVE;
390 con &= ~CON_TXSDMA_PAUSE;
391 } else {
392 con |= CON_TXDMA_ACTIVE;
393 con &= ~CON_TXDMA_PAUSE;
394 }
395
396 if (any_rx_active(i2s))
397 mod |= MOD_TXRX;
398 else
399 mod |= MOD_TXONLY;
400 } else {
401 if (is_secondary(i2s)) {
402 con |= CON_TXSDMA_PAUSE;
403 con &= ~CON_TXSDMA_ACTIVE;
404 } else {
405 con |= CON_TXDMA_PAUSE;
406 con &= ~CON_TXDMA_ACTIVE;
407 }
408
409 if (other_tx_active(i2s)) {
410 writel(con, addr + I2SCON);
411 return;
412 }
413
414 con |= CON_TXCH_PAUSE;
415
416 if (any_rx_active(i2s))
417 mod |= MOD_RXONLY;
418 else
419 con &= ~CON_ACTIVE;
420 }
421
422 writel(mod, addr + I2SMOD);
423 writel(con, addr + I2SCON);
424}
425
426/* RX Channel Control */
427static void i2s_rxctrl(struct i2s_dai *i2s, int on)
428{
429 void __iomem *addr = i2s->addr;
430 u32 con = readl(addr + I2SCON);
431 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
432
433 if (on) {
434 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
435 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
436
437 if (any_tx_active(i2s))
438 mod |= MOD_TXRX;
439 else
440 mod |= MOD_RXONLY;
441 } else {
442 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
443 con &= ~CON_RXDMA_ACTIVE;
444
445 if (any_tx_active(i2s))
446 mod |= MOD_TXONLY;
447 else
448 con &= ~CON_ACTIVE;
449 }
450
451 writel(mod, addr + I2SMOD);
452 writel(con, addr + I2SCON);
453}
454
455/* Flush FIFO of an interface */
456static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
457{
458 void __iomem *fic;
459 u32 val;
460
461 if (!i2s)
462 return;
463
464 if (is_secondary(i2s))
465 fic = i2s->addr + I2SFICS;
466 else
467 fic = i2s->addr + I2SFIC;
468
469 /* Flush the FIFO */
470 writel(readl(fic) | flush, fic);
471
472 /* Be patient */
473 val = msecs_to_loops(1) / 1000; /* 1 usec */
474 while (--val)
475 cpu_relax();
476
477 writel(readl(fic) & ~flush, fic);
478}
479
480static int i2s_set_sysclk(struct snd_soc_dai *dai,
481 int clk_id, unsigned int rfs, int dir)
482{
483 struct i2s_dai *i2s = to_info(dai);
484 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
485 u32 mod = readl(i2s->addr + I2SMOD);
486
487 switch (clk_id) {
488 case SAMSUNG_I2S_CDCLK:
489 /* Shouldn't matter in GATING(CLOCK_IN) mode */
490 if (dir == SND_SOC_CLOCK_IN)
491 rfs = 0;
492
493 if ((rfs && other->rfs && (other->rfs != rfs)) ||
494 (any_active(i2s) &&
495 (((dir == SND_SOC_CLOCK_IN)
496 && !(mod & MOD_CDCLKCON)) ||
497 ((dir == SND_SOC_CLOCK_OUT)
498 && (mod & MOD_CDCLKCON))))) {
499 dev_err(&i2s->pdev->dev,
500 "%s:%d Other DAI busy\n", __func__, __LINE__);
501 return -EAGAIN;
502 }
503
504 if (dir == SND_SOC_CLOCK_IN)
505 mod |= MOD_CDCLKCON;
506 else
507 mod &= ~MOD_CDCLKCON;
508
509 i2s->rfs = rfs;
510 break;
511
512 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
513 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
514 if ((i2s->quirks & QUIRK_NO_MUXPSR)
515 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
516 clk_id = 0;
517 else
518 clk_id = 1;
519
520 if (!any_active(i2s)) {
521 if (i2s->op_clk) {
522 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
523 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
524 clk_disable(i2s->op_clk);
525 clk_put(i2s->op_clk);
526 } else {
6ce534aa
JB		 527 i2s->rclk_srcrate =
528 clk_get_rate(i2s->op_clk);
1c7ac018
JB		 529 return 0;
530 }
531 }
532
533 i2s->op_clk = clk_get(&i2s->pdev->dev,
534 i2s->src_clk[clk_id]);
535 clk_enable(i2s->op_clk);
536 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
537
538 /* Over-ride the other's */
539 if (other) {
540 other->op_clk = i2s->op_clk;
541 other->rclk_srcrate = i2s->rclk_srcrate;
542 }
543 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
544 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
545 dev_err(&i2s->pdev->dev,
546 "%s:%d Other DAI busy\n", __func__, __LINE__);
547 return -EAGAIN;
548 } else {
549 /* Call can't be on the active DAI */
550 i2s->op_clk = other->op_clk;
551 i2s->rclk_srcrate = other->rclk_srcrate;
552 return 0;
553 }
554
555 if (clk_id == 0)
556 mod &= ~MOD_IMS_SYSMUX;
557 else
558 mod |= MOD_IMS_SYSMUX;
559 break;
560
561 default:
562 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
563 return -EINVAL;
564 }
565
566 writel(mod, i2s->addr + I2SMOD);
567
568 return 0;
569}
570
571static int i2s_set_fmt(struct snd_soc_dai *dai,
572 unsigned int fmt)
573{
574 struct i2s_dai *i2s = to_info(dai);
575 u32 mod = readl(i2s->addr + I2SMOD);
576 u32 tmp = 0;
577
578 /* Format is priority */
579 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
580 case SND_SOC_DAIFMT_RIGHT_J:
581 tmp |= MOD_LR_RLOW;
582 tmp |= MOD_SDF_MSB;
583 break;
584 case SND_SOC_DAIFMT_LEFT_J:
585 tmp |= MOD_LR_RLOW;
586 tmp |= MOD_SDF_LSB;
587 break;
588 case SND_SOC_DAIFMT_I2S:
589 tmp |= MOD_SDF_IIS;
590 break;
591 default:
592 dev_err(&i2s->pdev->dev, "Format not supported\n");
593 return -EINVAL;
594 }
595
596 /*
597 * INV flag is relative to the FORMAT flag - if set it simply
598 * flips the polarity specified by the Standard
599 */
600 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
601 case SND_SOC_DAIFMT_NB_NF:
602 break;
603 case SND_SOC_DAIFMT_NB_IF:
604 if (tmp & MOD_LR_RLOW)
605 tmp &= ~MOD_LR_RLOW;
606 else
607 tmp |= MOD_LR_RLOW;
608 break;
609 default:
610 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
611 return -EINVAL;
612 }
613
614 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
615 case SND_SOC_DAIFMT_CBM_CFM:
616 tmp |= MOD_SLAVE;
617 break;
618 case SND_SOC_DAIFMT_CBS_CFS:
619 /* Set default source clock in Master mode */
620 if (i2s->rclk_srcrate == 0)
621 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
622 0, SND_SOC_CLOCK_IN);
623 break;
624 default:
625 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
626 return -EINVAL;
627 }
628
629 if (any_active(i2s) &&
630 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
631 | MOD_SLAVE)) != tmp)) {
632 dev_err(&i2s->pdev->dev,
633 "%s:%d Other DAI busy\n", __func__, __LINE__);
634 return -EAGAIN;
635 }
636
637 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
638 mod |= tmp;
639 writel(mod, i2s->addr + I2SMOD);
640
641 return 0;
642}
643
644static int i2s_hw_params(struct snd_pcm_substream *substream,
645 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
646{
647 struct i2s_dai *i2s = to_info(dai);
648 u32 mod = readl(i2s->addr + I2SMOD);
649
650 if (!is_secondary(i2s))
651 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
652
653 switch (params_channels(params)) {
654 case 6:
655 mod |= MOD_DC2_EN;
656 case 4:
657 mod |= MOD_DC1_EN;
658 break;
659 case 2:
660 break;
661 default:
662 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
663 params_channels(params));
664 return -EINVAL;
665 }
666
667 if (is_secondary(i2s))
668 mod &= ~MOD_BLCS_MASK;
669 else
670 mod &= ~MOD_BLCP_MASK;
671
672 if (is_manager(i2s))
673 mod &= ~MOD_BLC_MASK;
674
675 switch (params_format(params)) {
676 case SNDRV_PCM_FORMAT_S8:
677 if (is_secondary(i2s))
678 mod |= MOD_BLCS_8BIT;
679 else
680 mod |= MOD_BLCP_8BIT;
681 if (is_manager(i2s))
682 mod |= MOD_BLC_8BIT;
683 break;
684 case SNDRV_PCM_FORMAT_S16_LE:
685 if (is_secondary(i2s))
686 mod |= MOD_BLCS_16BIT;
687 else
688 mod |= MOD_BLCP_16BIT;
689 if (is_manager(i2s))
690 mod |= MOD_BLC_16BIT;
691 break;
692 case SNDRV_PCM_FORMAT_S24_LE:
693 if (is_secondary(i2s))
694 mod |= MOD_BLCS_24BIT;
695 else
696 mod |= MOD_BLCP_24BIT;
697 if (is_manager(i2s))
698 mod |= MOD_BLC_24BIT;
699 break;
700 default:
701 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
702 params_format(params));
703 return -EINVAL;
704 }
705 writel(mod, i2s->addr + I2SMOD);
706
707 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
708 snd_soc_dai_set_dma_data(dai, substream,
709 (void *)&i2s->dma_playback);
710 else
711 snd_soc_dai_set_dma_data(dai, substream,
712 (void *)&i2s->dma_capture);
713
714 i2s->frmclk = params_rate(params);
715
716 return 0;
717}
718
719/* We set constraints on the substream acc to the version of I2S */
720static int i2s_startup(struct snd_pcm_substream *substream,
721 struct snd_soc_dai *dai)
722{
723 struct i2s_dai *i2s = to_info(dai);
724 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
725 unsigned long flags;
726
727 spin_lock_irqsave(&lock, flags);
728
729 i2s->mode |= DAI_OPENED;
730
731 if (is_manager(other))
732 i2s->mode &= ~DAI_MANAGER;
733 else
734 i2s->mode |= DAI_MANAGER;
735
736 /* Enforce set_sysclk in Master mode */
737 i2s->rclk_srcrate = 0;
738
739 spin_unlock_irqrestore(&lock, flags);
740
741 return 0;
742}
743
744static void i2s_shutdown(struct snd_pcm_substream *substream,
745 struct snd_soc_dai *dai)
746{
747 struct i2s_dai *i2s = to_info(dai);
748 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
749 unsigned long flags;
750
751 spin_lock_irqsave(&lock, flags);
752
753 i2s->mode &= ~DAI_OPENED;
754 i2s->mode &= ~DAI_MANAGER;
755
756 if (is_opened(other))
757 other->mode |= DAI_MANAGER;
758
759 /* Reset any constraint on RFS and BFS */
760 i2s->rfs = 0;
761 i2s->bfs = 0;
762
763 spin_unlock_irqrestore(&lock, flags);
764
765 /* Gate CDCLK by default */
766 if (!is_opened(other))
767 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
768 0, SND_SOC_CLOCK_IN);
769}
770
771static int config_setup(struct i2s_dai *i2s)
772{
773 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
774 unsigned rfs, bfs, blc;
775 u32 psr;
776
777 blc = get_blc(i2s);
778
779 bfs = i2s->bfs;
780
781 if (!bfs && other)
782 bfs = other->bfs;
783
784 /* Select least possible multiple(2) if no constraint set */
785 if (!bfs)
786 bfs = blc * 2;
787
788 rfs = i2s->rfs;
789
790 if (!rfs && other)
791 rfs = other->rfs;
792
793 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
794 dev_err(&i2s->pdev->dev,
795 "%d-RFS not supported for 24-blc\n", rfs);
796 return -EINVAL;
797 }
798
799 if (!rfs) {
800 if (bfs == 16 || bfs == 32)
801 rfs = 256;
802 else
803 rfs = 384;
804 }
805
806 /* If already setup and running */
807 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
808 dev_err(&i2s->pdev->dev,
809 "%s:%d Other DAI busy\n", __func__, __LINE__);
810 return -EAGAIN;
811 }
812
813 /* Don't bother RFS, BFS & PSR in Slave mode */
814 if (is_slave(i2s))
815 return 0;
816
817 set_bfs(i2s, bfs);
818 set_rfs(i2s, rfs);
819
820 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
821 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
822 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
823 dev_dbg(&i2s->pdev->dev,
824 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
825 i2s->rclk_srcrate, psr, rfs, bfs);
826 }
827
828 return 0;
829}
830
831static int i2s_trigger(struct snd_pcm_substream *substream,
832 int cmd, struct snd_soc_dai *dai)
833{
834 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
835 struct snd_soc_pcm_runtime *rtd = substream->private_data;
836 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
837 unsigned long flags;
838
839 switch (cmd) {
840 case SNDRV_PCM_TRIGGER_START:
841 case SNDRV_PCM_TRIGGER_RESUME:
842 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
843 local_irq_save(flags);
844
1c7ac018
JB		 845 if (config_setup(i2s)) {
846 local_irq_restore(flags);
847 return -EINVAL;
848 }
849
850 if (capture)
851 i2s_rxctrl(i2s, 1);
852 else
853 i2s_txctrl(i2s, 1);
854
855 local_irq_restore(flags);
856 break;
857 case SNDRV_PCM_TRIGGER_STOP:
858 case SNDRV_PCM_TRIGGER_SUSPEND:
859 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
860 local_irq_save(flags);
861
862 if (capture)
863 i2s_rxctrl(i2s, 0);
864 else
865 i2s_txctrl(i2s, 0);
866
775bc971
JB		 867 if (capture)
868 i2s_fifo(i2s, FIC_RXFLUSH);
869 else
870 i2s_fifo(i2s, FIC_TXFLUSH);
871
1c7ac018
JB		 872 local_irq_restore(flags);
873 break;
874 }
875
876 return 0;
877}
878
879static int i2s_set_clkdiv(struct snd_soc_dai *dai,
880 int div_id, int div)
881{
882 struct i2s_dai *i2s = to_info(dai);
883 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
884
885 switch (div_id) {
886 case SAMSUNG_I2S_DIV_BCLK:
887 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
888 || (other && other->bfs && (other->bfs != div))) {
889 dev_err(&i2s->pdev->dev,
890 "%s:%d Other DAI busy\n", __func__, __LINE__);
891 return -EAGAIN;
892 }
893 i2s->bfs = div;
894 break;
895 default:
896 dev_err(&i2s->pdev->dev,
897 "Invalid clock divider(%d)\n", div_id);
898 return -EINVAL;
899 }
900
901 return 0;
902}
903
904static snd_pcm_sframes_t
905i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
906{
907 struct i2s_dai *i2s = to_info(dai);
908 u32 reg = readl(i2s->addr + I2SFIC);
909 snd_pcm_sframes_t delay;
910
911 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
912 delay = FIC_RXCOUNT(reg);
913 else if (is_secondary(i2s))
914 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
915 else
916 delay = FIC_TXCOUNT(reg);
917
918 return delay;
919}
920
921#ifdef CONFIG_PM
922static int i2s_suspend(struct snd_soc_dai *dai)
923{
924 struct i2s_dai *i2s = to_info(dai);
925
926 if (dai->active) {
927 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
928 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
929 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
930 }
931
932 return 0;
933}
934
935static int i2s_resume(struct snd_soc_dai *dai)
936{
937 struct i2s_dai *i2s = to_info(dai);
938
939 if (dai->active) {
940 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
941 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
942 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
943 }
944
945 return 0;
946}
947#else
948#define i2s_suspend NULL
949#define i2s_resume NULL
950#endif
951
952static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
953{
954 struct i2s_dai *i2s = to_info(dai);
955 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
956
957 if (other && other->clk) /* If this is probe on secondary */
958 goto probe_exit;
959
960 i2s->addr = ioremap(i2s->base, 0x100);
961 if (i2s->addr == NULL) {
962 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
963 return -ENXIO;
964 }
965
966 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
967 if (IS_ERR(i2s->clk)) {
968 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
969 iounmap(i2s->addr);
970 return -ENOENT;
971 }
972 clk_enable(i2s->clk);
973
974 if (other) {
975 other->addr = i2s->addr;
976 other->clk = i2s->clk;
977 }
978
979 if (i2s->quirks & QUIRK_NEED_RSTCLR)
980 writel(CON_RSTCLR, i2s->addr + I2SCON);
981
982probe_exit:
983 /* Reset any constraint on RFS and BFS */
984 i2s->rfs = 0;
985 i2s->bfs = 0;
986 i2s_txctrl(i2s, 0);
987 i2s_rxctrl(i2s, 0);
988 i2s_fifo(i2s, FIC_TXFLUSH);
989 i2s_fifo(other, FIC_TXFLUSH);
990 i2s_fifo(i2s, FIC_RXFLUSH);
991
992 /* Gate CDCLK by default */
993 if (!is_opened(other))
994 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
995 0, SND_SOC_CLOCK_IN);
996
997 return 0;
998}
999
1000static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1001{
1002 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
1003 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
1004
1005 if (!other || !other->clk) {
1006
1007 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1008 writel(0, i2s->addr + I2SCON);
1009
1010 clk_disable(i2s->clk);
1011 clk_put(i2s->clk);
1012
1013 iounmap(i2s->addr);
1014 }
1015
1016 i2s->clk = NULL;
1017
1018 return 0;
1019}
1020
1021static struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1022 .trigger = i2s_trigger,
1023 .hw_params = i2s_hw_params,
1024 .set_fmt = i2s_set_fmt,
1025 .set_clkdiv = i2s_set_clkdiv,
1026 .set_sysclk = i2s_set_sysclk,
1027 .startup = i2s_startup,
1028 .shutdown = i2s_shutdown,
1029 .delay = i2s_delay,
1030};
1031
1032#define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
1033
1034#define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1035 SNDRV_PCM_FMTBIT_S16_LE | \
1036 SNDRV_PCM_FMTBIT_S24_LE)
1037
1038static __devinit
1039struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
1040{
1041 struct i2s_dai *i2s;
1042
1043 i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL);
1044 if (i2s == NULL)
1045 return NULL;
1046
1047 i2s->pdev = pdev;
1048 i2s->pri_dai = NULL;
1049 i2s->sec_dai = NULL;
1050 i2s->i2s_dai_drv.symmetric_rates = 1;
1051 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
1052 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
1053 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
1054 i2s->i2s_dai_drv.suspend = i2s_suspend;
1055 i2s->i2s_dai_drv.resume = i2s_resume;
1056 i2s->i2s_dai_drv.playback.channels_min = 2;
1057 i2s->i2s_dai_drv.playback.channels_max = 2;
1058 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
1059 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
1060
1061 if (!sec) {
1062 i2s->i2s_dai_drv.capture.channels_min = 2;
1063 i2s->i2s_dai_drv.capture.channels_max = 2;
1064 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
1065 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1066 } else { /* Create a new platform_device for Secondary */
1067 i2s->pdev = platform_device_register_resndata(NULL,
1068 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
1069 NULL, 0, NULL, 0);
1070 if (IS_ERR(i2s->pdev)) {
1071 kfree(i2s);
1072 return NULL;
1073 }
1074 }
1075
1076 /* Pre-assign snd_soc_dai_set_drvdata */
1077 dev_set_drvdata(&i2s->pdev->dev, i2s);
1078
1079 return i2s;
1080}
1081
1082static __devinit int samsung_i2s_probe(struct platform_device *pdev)
1083{
1084 u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
1085 struct i2s_dai *pri_dai, *sec_dai = NULL;
1086 struct s3c_audio_pdata *i2s_pdata;
1087 struct samsung_i2s *i2s_cfg;
1088 struct resource *res;
1089 u32 regs_base, quirks;
1090 int ret = 0;
1091
1092 /* Call during Seconday interface registration */
1093 if (pdev->id >= SAMSUNG_I2S_SECOFF) {
1094 sec_dai = dev_get_drvdata(&pdev->dev);
1095 snd_soc_register_dai(&sec_dai->pdev->dev,
1096 &sec_dai->i2s_dai_drv);
1097 return 0;
1098 }
1099
1100 i2s_pdata = pdev->dev.platform_data;
1101 if (i2s_pdata == NULL) {
1102 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1103 return -EINVAL;
1104 }
1105
1106 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1107 if (!res) {
1108 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
1109 return -ENXIO;
1110 }
1111 dma_pl_chan = res->start;
1112
1113 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1114 if (!res) {
1115 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
1116 return -ENXIO;
1117 }
1118 dma_cp_chan = res->start;
1119
1120 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1121 if (res)
1122 dma_pl_sec_chan = res->start;
1123 else
1124 dma_pl_sec_chan = 0;
1125
1126 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1127 if (!res) {
1128 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1129 return -ENXIO;
1130 }
1131
1132 if (!request_mem_region(res->start, resource_size(res),
1133 "samsung-i2s")) {
1134 dev_err(&pdev->dev, "Unable to request SFR region\n");
1135 return -EBUSY;
1136 }
1137 regs_base = res->start;
1138
1139 i2s_cfg = &i2s_pdata->type.i2s;
1140 quirks = i2s_cfg->quirks;
1141
1142 pri_dai = i2s_alloc_dai(pdev, false);
1143 if (!pri_dai) {
1144 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1145 ret = -ENOMEM;
1146 goto err1;
1147 }
1148
1149 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1150 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1151 pri_dai->dma_playback.client =
1152 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1153 pri_dai->dma_capture.client =
1154 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1155 pri_dai->dma_playback.channel = dma_pl_chan;
1156 pri_dai->dma_capture.channel = dma_cp_chan;
1157 pri_dai->src_clk = i2s_cfg->src_clk;
1158 pri_dai->dma_playback.dma_size = 4;
1159 pri_dai->dma_capture.dma_size = 4;
1160 pri_dai->base = regs_base;
1161 pri_dai->quirks = quirks;
1162
1163 if (quirks & QUIRK_PRI_6CHAN)
1164 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1165
1166 if (quirks & QUIRK_SEC_DAI) {
1167 sec_dai = i2s_alloc_dai(pdev, true);
1168 if (!sec_dai) {
1169 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1170 ret = -ENOMEM;
1171 goto err2;
1172 }
1173 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1174 sec_dai->dma_playback.client =
1175 (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1176 /* Use iDMA always if SysDMA not provided */
1177 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
1178 sec_dai->src_clk = i2s_cfg->src_clk;
1179 sec_dai->dma_playback.dma_size = 4;
1180 sec_dai->base = regs_base;
1181 sec_dai->quirks = quirks;
1182 sec_dai->pri_dai = pri_dai;
1183 pri_dai->sec_dai = sec_dai;
1184 }
1185
1186 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1187 dev_err(&pdev->dev, "Unable to configure gpio\n");
1188 ret = -EINVAL;
1189 goto err3;
1190 }
1191
1192 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
1193
1194 return 0;
1195err3:
1196 kfree(sec_dai);
1197err2:
1198 kfree(pri_dai);
1199err1:
1200 release_mem_region(regs_base, resource_size(res));
1201
1202 return ret;
1203}
1204
1205static __devexit int samsung_i2s_remove(struct platform_device *pdev)
1206{
1207 struct i2s_dai *i2s, *other;
1208
1209 i2s = dev_get_drvdata(&pdev->dev);
1210 other = i2s->pri_dai ? : i2s->sec_dai;
1211
1212 if (other) {
1213 other->pri_dai = NULL;
1214 other->sec_dai = NULL;
1215 } else {
1216 struct resource *res;
1217 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1218 if (res)
1219 release_mem_region(res->start, resource_size(res));
1220 }
1221
1222 i2s->pri_dai = NULL;
1223 i2s->sec_dai = NULL;
1224
1225 kfree(i2s);
1226
1227 snd_soc_unregister_dai(&pdev->dev);
1228
1229 return 0;
1230}
1231
1232static struct platform_driver samsung_i2s_driver = {
1233 .probe = samsung_i2s_probe,
1234 .remove = samsung_i2s_remove,
1235 .driver = {
1236 .name = "samsung-i2s",
1237 .owner = THIS_MODULE,
1238 },
1239};
1240
1241static int __init samsung_i2s_init(void)
1242{
1243 return platform_driver_register(&samsung_i2s_driver);
1244}
1245module_init(samsung_i2s_init);
1246
1247static void __exit samsung_i2s_exit(void)
1248{
1249 platform_driver_unregister(&samsung_i2s_driver);
1250}
1251module_exit(samsung_i2s_exit);
1252
1253/* Module information */
1254MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
1255MODULE_DESCRIPTION("Samsung I2S Interface");
1256MODULE_ALIAS("platform:samsung-i2s");
1257MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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