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18#include <linux/init.h>
19#include <linux/module.h>
20#include <linux/device.h>
21#include <linux/slab.h>
22#include <linux/delay.h>
23#include <linux/io.h>
24#include <linux/clk.h>
25
26#include <sound/core.h>
27#include <sound/pcm.h>
28#include <sound/pcm_params.h>
29#include <sound/initval.h>
30#include <sound/soc.h>
31
32#include "davinci-pcm.h"
33#include "davinci-mcasp.h"
34
35
36
37
38#define DAVINCI_MCASP_PID_REG 0x00
39#define DAVINCI_MCASP_PWREMUMGT_REG 0x04
40
41#define DAVINCI_MCASP_PFUNC_REG 0x10
42#define DAVINCI_MCASP_PDIR_REG 0x14
43#define DAVINCI_MCASP_PDOUT_REG 0x18
44#define DAVINCI_MCASP_PDSET_REG 0x1c
45
46#define DAVINCI_MCASP_PDCLR_REG 0x20
47
48#define DAVINCI_MCASP_TLGC_REG 0x30
49#define DAVINCI_MCASP_TLMR_REG 0x34
50
51#define DAVINCI_MCASP_GBLCTL_REG 0x44
52#define DAVINCI_MCASP_AMUTE_REG 0x48
53#define DAVINCI_MCASP_LBCTL_REG 0x4c
54
55#define DAVINCI_MCASP_TXDITCTL_REG 0x50
56
57#define DAVINCI_MCASP_GBLCTLR_REG 0x60
58#define DAVINCI_MCASP_RXMASK_REG 0x64
59#define DAVINCI_MCASP_RXFMT_REG 0x68
60#define DAVINCI_MCASP_RXFMCTL_REG 0x6c
61
62#define DAVINCI_MCASP_ACLKRCTL_REG 0x70
63#define DAVINCI_MCASP_AHCLKRCTL_REG 0x74
64#define DAVINCI_MCASP_RXTDM_REG 0x78
65#define DAVINCI_MCASP_EVTCTLR_REG 0x7c
66
67#define DAVINCI_MCASP_RXSTAT_REG 0x80
68#define DAVINCI_MCASP_RXTDMSLOT_REG 0x84
69#define DAVINCI_MCASP_RXCLKCHK_REG 0x88
70#define DAVINCI_MCASP_REVTCTL_REG 0x8c
71
72#define DAVINCI_MCASP_GBLCTLX_REG 0xa0
73#define DAVINCI_MCASP_TXMASK_REG 0xa4
74#define DAVINCI_MCASP_TXFMT_REG 0xa8
75#define DAVINCI_MCASP_TXFMCTL_REG 0xac
76
77#define DAVINCI_MCASP_ACLKXCTL_REG 0xb0
78#define DAVINCI_MCASP_AHCLKXCTL_REG 0xb4
79#define DAVINCI_MCASP_TXTDM_REG 0xb8
80#define DAVINCI_MCASP_EVTCTLX_REG 0xbc
81
82#define DAVINCI_MCASP_TXSTAT_REG 0xc0
83#define DAVINCI_MCASP_TXTDMSLOT_REG 0xc4
84#define DAVINCI_MCASP_TXCLKCHK_REG 0xc8
85#define DAVINCI_MCASP_XEVTCTL_REG 0xcc
86
87
88#define DAVINCI_MCASP_DITCSRA_REG 0x100
89
90#define DAVINCI_MCASP_DITCSRB_REG 0x118
91
92#define DAVINCI_MCASP_DITUDRA_REG 0x130
93
94#define DAVINCI_MCASP_DITUDRB_REG 0x148
95
96
97#define DAVINCI_MCASP_XRSRCTL_BASE_REG 0x180
98#define DAVINCI_MCASP_XRSRCTL_REG(n) (DAVINCI_MCASP_XRSRCTL_BASE_REG + \
99 (n << 2))
100
101
102#define DAVINCI_MCASP_TXBUF_REG 0x200
103
104#define DAVINCI_MCASP_RXBUF_REG 0x280
105
106
107#define DAVINCI_MCASP_WFIFOCTL (0x1010)
108#define DAVINCI_MCASP_WFIFOSTS (0x1014)
109#define DAVINCI_MCASP_RFIFOCTL (0x1018)
110#define DAVINCI_MCASP_RFIFOSTS (0x101C)
111
112
113
114
115
116#define MCASP_FREE BIT(0)
117#define MCASP_SOFT BIT(1)
118
119
120
121
122#define AXR(n) (1<<n)
123#define PFUNC_AMUTE BIT(25)
124#define ACLKX BIT(26)
125#define AHCLKX BIT(27)
126#define AFSX BIT(28)
127#define ACLKR BIT(29)
128#define AHCLKR BIT(30)
129#define AFSR BIT(31)
130
131
132
133
134#define AXR(n) (1<<n)
135#define PDIR_AMUTE BIT(25)
136#define ACLKX BIT(26)
137#define AHCLKX BIT(27)
138#define AFSX BIT(28)
139#define ACLKR BIT(29)
140#define AHCLKR BIT(30)
141#define AFSR BIT(31)
142
143
144
145
146#define DITEN BIT(0)
147#define VA BIT(2)
148#define VB BIT(3)
149
150
151
152
153#define TXROT(val) (val)
154#define TXSEL BIT(3)
155#define TXSSZ(val) (val<<4)
156#define TXPBIT(val) (val<<8)
157#define TXPAD(val) (val<<13)
158#define TXORD BIT(15)
159#define FSXDLY(val) (val<<16)
160
161
162
163
164#define RXROT(val) (val)
165#define RXSEL BIT(3)
166#define RXSSZ(val) (val<<4)
167#define RXPBIT(val) (val<<8)
168#define RXPAD(val) (val<<13)
169#define RXORD BIT(15)
170#define FSRDLY(val) (val<<16)
171
172
173
174
175#define FSXPOL BIT(0)
176#define AFSXE BIT(1)
177#define FSXDUR BIT(4)
178#define FSXMOD(val) (val<<7)
179
180
181
182
183#define FSRPOL BIT(0)
184#define AFSRE BIT(1)
185#define FSRDUR BIT(4)
186#define FSRMOD(val) (val<<7)
187
188
189
190
191#define ACLKXDIV(val) (val)
192#define ACLKXE BIT(5)
193#define TX_ASYNC BIT(6)
194#define ACLKXPOL BIT(7)
195
196
197
198
199#define ACLKRDIV(val) (val)
200#define ACLKRE BIT(5)
201#define RX_ASYNC BIT(6)
202#define ACLKRPOL BIT(7)
203
204
205
206
207
208#define AHCLKXDIV(val) (val)
209#define AHCLKXPOL BIT(14)
210#define AHCLKXE BIT(15)
211
212
213
214
215
216#define AHCLKRDIV(val) (val)
217#define AHCLKRPOL BIT(14)
218#define AHCLKRE BIT(15)
219
220
221
222
223#define MODE(val) (val)
224#define DISMOD (val)(val<<2)
225#define TXSTATE BIT(4)
226#define RXSTATE BIT(5)
227
228
229
230
231#define LBEN BIT(0)
232#define LBORD BIT(1)
233#define LBGENMODE(val) (val<<2)
234
235
236
237
238#define TXTDMS(n) (1<<n)
239
240
241
242
243#define RXTDMS(n) (1<<n)
244
245
246
247
248#define RXCLKRST BIT(0)
249#define RXHCLKRST BIT(1)
250#define RXSERCLR BIT(2)
251#define RXSMRST BIT(3)
252#define RXFSRST BIT(4)
253#define TXCLKRST BIT(8)
254#define TXHCLKRST BIT(9)
255#define TXSERCLR BIT(10)
256#define TXSMRST BIT(11)
257#define TXFSRST BIT(12)
258
259
260
261
262#define MUTENA(val) (val)
263#define MUTEINPOL BIT(2)
264#define MUTEINENA BIT(3)
265#define MUTEIN BIT(4)
266#define MUTER BIT(5)
267#define MUTEX BIT(6)
268#define MUTEFSR BIT(7)
269#define MUTEFSX BIT(8)
270#define MUTEBADCLKR BIT(9)
271#define MUTEBADCLKX BIT(10)
272#define MUTERXDMAERR BIT(11)
273#define MUTETXDMAERR BIT(12)
274
275
276
277
278#define RXDATADMADIS BIT(0)
279
280
281
282
283#define TXDATADMADIS BIT(0)
284
285
286
287
288#define FIFO_ENABLE BIT(16)
289#define NUMEVT_MASK (0xFF << 8)
290#define NUMDMA_MASK (0xFF)
291
292#define DAVINCI_MCASP_NUM_SERIALIZER 16
293
294static inline void mcasp_set_bits(void __iomem *reg, u32 val)
295{
296 __raw_writel(__raw_readl(reg) | val, reg);
297}
298
299static inline void mcasp_clr_bits(void __iomem *reg, u32 val)
300{
301 __raw_writel((__raw_readl(reg) & ~(val)), reg);
302}
303
304static inline void mcasp_mod_bits(void __iomem *reg, u32 val, u32 mask)
305{
306 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
307}
308
309static inline void mcasp_set_reg(void __iomem *reg, u32 val)
310{
311 __raw_writel(val, reg);
312}
313
314static inline u32 mcasp_get_reg(void __iomem *reg)
315{
316 return (unsigned int)__raw_readl(reg);
317}
318
319static inline void mcasp_set_ctl_reg(void __iomem *regs, u32 val)
320{
321 int i = 0;
322
323 mcasp_set_bits(regs, val);
324
325
326
327 for (i = 0; i < 1000; i++) {
328 if ((mcasp_get_reg(regs) & val) == val)
329 break;
330 }
331
332 if (i == 1000 && ((mcasp_get_reg(regs) & val) != val))
333 printk(KERN_ERR "GBLCTL write error\n");
334}
335
336static void mcasp_start_rx(struct davinci_audio_dev *dev)
337{
338 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
339 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
340 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
341 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXBUF_REG, 0);
342
343 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
344 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
345 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXBUF_REG, 0);
346
347 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
348 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
349}
350
351static void mcasp_start_tx(struct davinci_audio_dev *dev)
352{
353 u8 offset = 0, i;
354 u32 cnt;
355
356 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
357 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
358 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
359 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
360
361 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
362 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
363 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
364 for (i = 0; i < dev->num_serializer; i++) {
365 if (dev->serial_dir[i] == TX_MODE) {
366 offset = i;
367 break;
368 }
369 }
370
371
372 cnt = 0;
373 while (!(mcasp_get_reg(dev->base + DAVINCI_MCASP_XRSRCTL_REG(offset)) &
374 TXSTATE) && (cnt < 100000))
375 cnt++;
376
377 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
378}
379
380static void davinci_mcasp_start(struct davinci_audio_dev *dev, int stream)
381{
382 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
383 if (dev->txnumevt)
384 mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
385 FIFO_ENABLE);
386 mcasp_start_tx(dev);
387 } else {
388 if (dev->rxnumevt)
389 mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
390 FIFO_ENABLE);
391 mcasp_start_rx(dev);
392 }
393}
394
395static void mcasp_stop_rx(struct davinci_audio_dev *dev)
396{
397 mcasp_set_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, 0);
398 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
399}
400
401static void mcasp_stop_tx(struct davinci_audio_dev *dev)
402{
403 mcasp_set_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, 0);
404 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
405}
406
407static void davinci_mcasp_stop(struct davinci_audio_dev *dev, int stream)
408{
409 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
410 if (dev->txnumevt)
411 mcasp_clr_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
412 FIFO_ENABLE);
413 mcasp_stop_tx(dev);
414 } else {
415 if (dev->rxnumevt)
416 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
417 FIFO_ENABLE);
418 mcasp_stop_rx(dev);
419 }
420}
421
422static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
423 unsigned int fmt)
424{
425 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
426 void __iomem *base = dev->base;
427
428 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
429 case SND_SOC_DAIFMT_CBS_CFS:
430
431 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
432 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
433
434 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
435 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
436
437 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x7 << 26));
438 break;
439 case SND_SOC_DAIFMT_CBM_CFS:
440
441 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
442 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
443
444 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
445 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
446
447 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x2d << 26));
448 break;
449 case SND_SOC_DAIFMT_CBM_CFM:
450
451 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
452 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
453
454 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
455 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
456
457 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG, (0x3f << 26));
458 break;
459
460 default:
461 return -EINVAL;
462 }
463
464 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
465 case SND_SOC_DAIFMT_IB_NF:
466 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
467 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
468
469 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
470 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
471 break;
472
473 case SND_SOC_DAIFMT_NB_IF:
474 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
475 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
476
477 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
478 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
479 break;
480
481 case SND_SOC_DAIFMT_IB_IF:
482 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
483 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
484
485 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
486 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
487 break;
488
489 case SND_SOC_DAIFMT_NB_NF:
490 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
491 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
492
493 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
494 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
495 break;
496
497 default:
498 return -EINVAL;
499 }
500
501 return 0;
502}
503
504static int davinci_config_channel_size(struct davinci_audio_dev *dev,
505 int channel_size)
506{
507 u32 fmt = 0;
508 u32 mask, rotate;
509
510 switch (channel_size) {
511 case DAVINCI_AUDIO_WORD_8:
512 fmt = 0x03;
513 rotate = 6;
514 mask = 0x000000ff;
515 break;
516
517 case DAVINCI_AUDIO_WORD_12:
518 fmt = 0x05;
519 rotate = 5;
520 mask = 0x00000fff;
521 break;
522
523 case DAVINCI_AUDIO_WORD_16:
524 fmt = 0x07;
525 rotate = 4;
526 mask = 0x0000ffff;
527 break;
528
529 case DAVINCI_AUDIO_WORD_20:
530 fmt = 0x09;
531 rotate = 3;
532 mask = 0x000fffff;
533 break;
534
535 case DAVINCI_AUDIO_WORD_24:
536 fmt = 0x0B;
537 rotate = 2;
538 mask = 0x00ffffff;
539 break;
540
541 case DAVINCI_AUDIO_WORD_28:
542 fmt = 0x0D;
543 rotate = 1;
544 mask = 0x0fffffff;
545 break;
546
547 case DAVINCI_AUDIO_WORD_32:
548 fmt = 0x0F;
549 rotate = 0;
550 mask = 0xffffffff;
551 break;
552
553 default:
554 return -EINVAL;
555 }
556
557 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
558 RXSSZ(fmt), RXSSZ(0x0F));
559 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
560 TXSSZ(fmt), TXSSZ(0x0F));
561 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXROT(rotate),
562 TXROT(7));
563 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXROT(rotate),
564 RXROT(7));
565 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, mask);
566 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, mask);
567
568 return 0;
569}
570
571static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
572{
573 int i;
574 u8 tx_ser = 0;
575 u8 rx_ser = 0;
576
577
578 mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
579
580
581 mcasp_set_reg(dev->base + DAVINCI_MCASP_PFUNC_REG, 0x00000000);
582
583 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
584 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
585 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG,
586 TXDATADMADIS);
587 } else {
588 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
589 mcasp_clr_bits(dev->base + DAVINCI_MCASP_REVTCTL_REG,
590 RXDATADMADIS);
591 }
592
593 for (i = 0; i < dev->num_serializer; i++) {
594 mcasp_set_bits(dev->base + DAVINCI_MCASP_XRSRCTL_REG(i),
595 dev->serial_dir[i]);
596 if (dev->serial_dir[i] == TX_MODE) {
597 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
598 AXR(i));
599 tx_ser++;
600 } else if (dev->serial_dir[i] == RX_MODE) {
601 mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
602 AXR(i));
603 rx_ser++;
604 }
605 }
606
607 if (dev->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
608 if (dev->txnumevt * tx_ser > 64)
609 dev->txnumevt = 1;
610
611 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, tx_ser,
612 NUMDMA_MASK);
613 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
614 ((dev->txnumevt * tx_ser) << 8), NUMEVT_MASK);
615 }
616
617 if (dev->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
618 if (dev->rxnumevt * rx_ser > 64)
619 dev->rxnumevt = 1;
620
621 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, rx_ser,
622 NUMDMA_MASK);
623 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
624 ((dev->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
625 }
626}
627
628static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
629{
630 int i, active_slots;
631 u32 mask = 0;
632
633 active_slots = (dev->tdm_slots > 31) ? 32 : dev->tdm_slots;
634 for (i = 0; i < active_slots; i++)
635 mask |= (1 << i);
636
637 mcasp_clr_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
638
639 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
640
641
642 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG,
643 AHCLKXE);
644 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, mask);
645 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXORD);
646
647 if ((dev->tdm_slots >= 2) || (dev->tdm_slots <= 32))
648 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
649 FSXMOD(dev->tdm_slots), FSXMOD(0x1FF));
650 else
651 printk(KERN_ERR "playback tdm slot %d not supported\n",
652 dev->tdm_slots);
653
654 mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
655 } else {
656
657
658 mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXORD);
659 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG,
660 AHCLKRE);
661 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXTDM_REG, mask);
662
663 if ((dev->tdm_slots >= 2) || (dev->tdm_slots <= 32))
664 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG,
665 FSRMOD(dev->tdm_slots), FSRMOD(0x1FF));
666 else
667 printk(KERN_ERR "capture tdm slot %d not supported\n",
668 dev->tdm_slots);
669
670 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
671 }
672}
673
674
675static void davinci_hw_dit_param(struct davinci_audio_dev *dev)
676{
677
678 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AFSX);
679
680
681 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0x00FFFFFF);
682
683
684
685 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
686 TXROT(6) | TXSSZ(15));
687
688
689 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
690 AFSXE | FSXMOD(0x180));
691
692
693 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
694
695
696 mcasp_set_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG,
697 ACLKXE | TX_ASYNC);
698
699 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
700
701
702 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
703
704
705 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
706}
707
708static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
709 struct snd_pcm_hw_params *params,
710 struct snd_soc_dai *cpu_dai)
711{
712 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
713 struct davinci_pcm_dma_params *dma_params =
714 &dev->dma_params[substream->stream];
715 int word_length;
716 u8 fifo_level;
717
718 davinci_hw_common_param(dev, substream->stream);
719 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
720 fifo_level = dev->txnumevt;
721 else
722 fifo_level = dev->rxnumevt;
723
724 if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
725 davinci_hw_dit_param(dev);
726 else
727 davinci_hw_param(dev, substream->stream);
728
729 switch (params_format(params)) {
730 case SNDRV_PCM_FORMAT_S8:
731 dma_params->data_type = 1;
732 word_length = DAVINCI_AUDIO_WORD_8;
733 break;
734
735 case SNDRV_PCM_FORMAT_S16_LE:
736 dma_params->data_type = 2;
737 word_length = DAVINCI_AUDIO_WORD_16;
738 break;
739
740 case SNDRV_PCM_FORMAT_S32_LE:
741 dma_params->data_type = 4;
742 word_length = DAVINCI_AUDIO_WORD_32;
743 break;
744
745 default:
746 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
747 return -EINVAL;
748 }
749
750 if (dev->version == MCASP_VERSION_2 && !fifo_level)
751 dma_params->acnt = 4;
752 else
753 dma_params->acnt = dma_params->data_type;
754
755 dma_params->fifo_level = fifo_level;
756 davinci_config_channel_size(dev, word_length);
757
758 return 0;
759}
760
761static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
762 int cmd, struct snd_soc_dai *cpu_dai)
763{
764 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
765 int ret = 0;
766
767 switch (cmd) {
768 case SNDRV_PCM_TRIGGER_RESUME:
769 case SNDRV_PCM_TRIGGER_START:
770 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
771 if (!dev->clk_active) {
772 clk_enable(dev->clk);
773 dev->clk_active = 1;
774 }
775 davinci_mcasp_start(dev, substream->stream);
776 break;
777
778 case SNDRV_PCM_TRIGGER_SUSPEND:
779 davinci_mcasp_stop(dev, substream->stream);
780 if (dev->clk_active) {
781 clk_disable(dev->clk);
782 dev->clk_active = 0;
783 }
784
785 break;
786
787 case SNDRV_PCM_TRIGGER_STOP:
788 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
789 davinci_mcasp_stop(dev, substream->stream);
790 break;
791
792 default:
793 ret = -EINVAL;
794 }
795
796 return ret;
797}
798
799static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
800 struct snd_soc_dai *dai)
801{
802 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
803
804 snd_soc_dai_set_dma_data(dai, substream, dev->dma_params);
805 return 0;
806}
807
808static struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
809 .startup = davinci_mcasp_startup,
810 .trigger = davinci_mcasp_trigger,
811 .hw_params = davinci_mcasp_hw_params,
812 .set_fmt = davinci_mcasp_set_dai_fmt,
813
814};
815
816static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
817 {
818 .name = "davinci-mcasp.0",
819 .playback = {
820 .channels_min = 2,
821 .channels_max = 2,
822 .rates = DAVINCI_MCASP_RATES,
823 .formats = SNDRV_PCM_FMTBIT_S8 |
824 SNDRV_PCM_FMTBIT_S16_LE |
825 SNDRV_PCM_FMTBIT_S32_LE,
826 },
827 .capture = {
828 .channels_min = 2,
829 .channels_max = 2,
830 .rates = DAVINCI_MCASP_RATES,
831 .formats = SNDRV_PCM_FMTBIT_S8 |
832 SNDRV_PCM_FMTBIT_S16_LE |
833 SNDRV_PCM_FMTBIT_S32_LE,
834 },
835 .ops = &davinci_mcasp_dai_ops,
836
837 },
838 {
839 "davinci-mcasp.1",
840 .playback = {
841 .channels_min = 1,
842 .channels_max = 384,
843 .rates = DAVINCI_MCASP_RATES,
844 .formats = SNDRV_PCM_FMTBIT_S16_LE,
845 },
846 .ops = &davinci_mcasp_dai_ops,
847 },
848
849};
850
851static int davinci_mcasp_probe(struct platform_device *pdev)
852{
853 struct davinci_pcm_dma_params *dma_data;
854 struct resource *mem, *ioarea, *res;
855 struct snd_platform_data *pdata;
856 struct davinci_audio_dev *dev;
857 int ret = 0;
858
859 dev = kzalloc(sizeof(struct davinci_audio_dev), GFP_KERNEL);
860 if (!dev)
861 return -ENOMEM;
862
863 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
864 if (!mem) {
865 dev_err(&pdev->dev, "no mem resource?\n");
866 ret = -ENODEV;
867 goto err_release_data;
868 }
869
870 ioarea = request_mem_region(mem->start,
871 (mem->end - mem->start) + 1, pdev->name);
872 if (!ioarea) {
873 dev_err(&pdev->dev, "Audio region already claimed\n");
874 ret = -EBUSY;
875 goto err_release_data;
876 }
877
878 pdata = pdev->dev.platform_data;
879 dev->clk = clk_get(&pdev->dev, NULL);
880 if (IS_ERR(dev->clk)) {
881 ret = -ENODEV;
882 goto err_release_region;
883 }
884
885 clk_enable(dev->clk);
886 dev->clk_active = 1;
887
888 dev->base = (void __iomem *)IO_ADDRESS(mem->start);
889 dev->op_mode = pdata->op_mode;
890 dev->tdm_slots = pdata->tdm_slots;
891 dev->num_serializer = pdata->num_serializer;
892 dev->serial_dir = pdata->serial_dir;
893 dev->codec_fmt = pdata->codec_fmt;
894 dev->version = pdata->version;
895 dev->txnumevt = pdata->txnumevt;
896 dev->rxnumevt = pdata->rxnumevt;
897
898 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
899 dma_data->asp_chan_q = pdata->asp_chan_q;
900 dma_data->ram_chan_q = pdata->ram_chan_q;
901 dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
902 io_v2p(dev->base));
903
904
905 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
906 if (!res) {
907 dev_err(&pdev->dev, "no DMA resource\n");
908 ret = -ENODEV;
909 goto err_release_region;
910 }
911
912 dma_data->channel = res->start;
913
914 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
915 dma_data->asp_chan_q = pdata->asp_chan_q;
916 dma_data->ram_chan_q = pdata->ram_chan_q;
917 dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
918 io_v2p(dev->base));
919
920 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
921 if (!res) {
922 dev_err(&pdev->dev, "no DMA resource\n");
923 ret = -ENODEV;
924 goto err_release_region;
925 }
926
927 dma_data->channel = res->start;
928 dev_set_drvdata(&pdev->dev, dev);
929 ret = snd_soc_register_dai(&pdev->dev, &davinci_mcasp_dai[pdata->op_mode]);
930
931 if (ret != 0)
932 goto err_release_region;
933 return 0;
934
935err_release_region:
936 release_mem_region(mem->start, (mem->end - mem->start) + 1);
937err_release_data:
938 kfree(dev);
939
940 return ret;
941}
942
943static int davinci_mcasp_remove(struct platform_device *pdev)
944{
945 struct davinci_audio_dev *dev = dev_get_drvdata(&pdev->dev);
946 struct resource *mem;
947
948 snd_soc_unregister_dai(&pdev->dev);
949 clk_disable(dev->clk);
950 clk_put(dev->clk);
951 dev->clk = NULL;
952
953 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
954 release_mem_region(mem->start, (mem->end - mem->start) + 1);
955
956 kfree(dev);
957
958 return 0;
959}
960
961static struct platform_driver davinci_mcasp_driver = {
962 .probe = davinci_mcasp_probe,
963 .remove = davinci_mcasp_remove,
964 .driver = {
965 .name = "davinci-mcasp",
966 .owner = THIS_MODULE,
967 },
968};
969
970static int __init davinci_mcasp_init(void)
971{
972 return platform_driver_register(&davinci_mcasp_driver);
973}
974module_init(davinci_mcasp_init);
975
976static void __exit davinci_mcasp_exit(void)
977{
978 platform_driver_unregister(&davinci_mcasp_driver);
979}
980module_exit(davinci_mcasp_exit);
981
982MODULE_AUTHOR("Steve Chen");
983MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
984MODULE_LICENSE("GPL");
985
986