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writeback: split writeback_inodes_wb
[linux-2.6/next.git] / sound / soc / davinci / davinci-mcasp.c
blobd3955096d87214e842d3ba25d0e45aedf3fbcc12
1 /*
2 * ALSA SoC McASP Audio Layer for TI DAVINCI processor
3 *
4 * Multi-channel Audio Serial Port Driver
5 *
6 * Author: Nirmal Pandey <n-pandey@ti.com>,
7 * Suresh Rajashekara <suresh.r@ti.com>
8 * Steve Chen <schen@.mvista.com>
9 *
10 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
11 * Copyright: (C) 2009 Texas Instruments, India
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
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 * McASP register definitions
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 /* Left(even TDM Slot) Channel Status Register File */
88 #define DAVINCI_MCASP_DITCSRA_REG 0x100
89 /* Right(odd TDM slot) Channel Status Register File */
90 #define DAVINCI_MCASP_DITCSRB_REG 0x118
91 /* Left(even TDM slot) User Data Register File */
92 #define DAVINCI_MCASP_DITUDRA_REG 0x130
93 /* Right(odd TDM Slot) User Data Register File */
94 #define DAVINCI_MCASP_DITUDRB_REG 0x148
95
96 /* Serializer n Control Register */
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 /* Transmit Buffer for Serializer n */
102 #define DAVINCI_MCASP_TXBUF_REG 0x200
103 /* Receive Buffer for Serializer n */
104 #define DAVINCI_MCASP_RXBUF_REG 0x280
105
106 /* McASP FIFO Registers */
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 * DAVINCI_MCASP_PWREMUMGT_REG - Power Down and Emulation Management
114 * Register Bits
115 */
116 #define MCASP_FREE BIT(0)
117 #define MCASP_SOFT BIT(1)
118
119 /*
120 * DAVINCI_MCASP_PFUNC_REG - Pin Function / GPIO Enable Register Bits
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 * DAVINCI_MCASP_PDIR_REG - Pin Direction Register Bits
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 * DAVINCI_MCASP_TXDITCTL_REG - Transmit DIT Control Register Bits
145 */
146 #define DITEN BIT(0) /* Transmit DIT mode enable/disable */
147 #define VA BIT(2)
148 #define VB BIT(3)
149
150 /*
151 * DAVINCI_MCASP_TXFMT_REG - Transmit Bitstream Format Register Bits
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 * DAVINCI_MCASP_RXFMT_REG - Receive Bitstream Format Register Bits
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 * DAVINCI_MCASP_TXFMCTL_REG - Transmit Frame Control Register Bits
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 * DAVINCI_MCASP_RXFMCTL_REG - Receive Frame Control Register Bits
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 * DAVINCI_MCASP_ACLKXCTL_REG - Transmit Clock Control Register Bits
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 * DAVINCI_MCASP_ACLKRCTL_REG Receive Clock Control Register Bits
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 * DAVINCI_MCASP_AHCLKXCTL_REG - High Frequency Transmit Clock Control
206 * Register Bits
207 */
208 #define AHCLKXDIV(val) (val)
209 #define AHCLKXPOL BIT(14)
210 #define AHCLKXE BIT(15)
211
212 /*
213 * DAVINCI_MCASP_AHCLKRCTL_REG - High Frequency Receive Clock Control
214 * Register Bits
215 */
216 #define AHCLKRDIV(val) (val)
217 #define AHCLKRPOL BIT(14)
218 #define AHCLKRE BIT(15)
219
220 /*
221 * DAVINCI_MCASP_XRSRCTL_BASE_REG - Serializer Control Register Bits
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 * DAVINCI_MCASP_LBCTL_REG - Loop Back Control Register Bits
230 */
231 #define LBEN BIT(0)
232 #define LBORD BIT(1)
233 #define LBGENMODE(val) (val<<2)
234
235 /*
236 * DAVINCI_MCASP_TXTDMSLOT_REG - Transmit TDM Slot Register configuration
237 */
238 #define TXTDMS(n) (1<<n)
239
240 /*
241 * DAVINCI_MCASP_RXTDMSLOT_REG - Receive TDM Slot Register configuration
242 */
243 #define RXTDMS(n) (1<<n)
244
245 /*
246 * DAVINCI_MCASP_GBLCTL_REG - Global Control Register Bits
247 */
248 #define RXCLKRST BIT(0) /* Receiver Clock Divider Reset */
249 #define RXHCLKRST BIT(1) /* Receiver High Frequency Clock Divider */
250 #define RXSERCLR BIT(2) /* Receiver Serializer Clear */
251 #define RXSMRST BIT(3) /* Receiver State Machine Reset */
252 #define RXFSRST BIT(4) /* Frame Sync Generator Reset */
253 #define TXCLKRST BIT(8) /* Transmitter Clock Divider Reset */
254 #define TXHCLKRST BIT(9) /* Transmitter High Frequency Clock Divider*/
255 #define TXSERCLR BIT(10) /* Transmit Serializer Clear */
256 #define TXSMRST BIT(11) /* Transmitter State Machine Reset */
257 #define TXFSRST BIT(12) /* Frame Sync Generator Reset */
258
259 /*
260 * DAVINCI_MCASP_AMUTE_REG - Mute Control Register Bits
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 * DAVINCI_MCASP_REVTCTL_REG - Receiver DMA Event Control Register bits
277 */
278 #define RXDATADMADIS BIT(0)
279
280 /*
281 * DAVINCI_MCASP_XEVTCTL_REG - Transmitter DMA Event Control Register bits
282 */
283 #define TXDATADMADIS BIT(0)
284
285 /*
286 * DAVINCI_MCASP_W[R]FIFOCTL - Write/Read FIFO Control Register bits
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
294 static inline void mcasp_set_bits(void __iomem *reg, u32 val)
295 {
296 __raw_writel(__raw_readl(reg) | val, reg);
297 }
298
299 static inline void mcasp_clr_bits(void __iomem *reg, u32 val)
300 {
301 __raw_writel((__raw_readl(reg) & ~(val)), reg);
302 }
303
304 static inline void mcasp_mod_bits(void __iomem *reg, u32 val, u32 mask)
305 {
306 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
307 }
308
309 static inline void mcasp_set_reg(void __iomem *reg, u32 val)
310 {
311 __raw_writel(val, reg);
312 }
313
314 static inline u32 mcasp_get_reg(void __iomem *reg)
315 {
316 return (unsigned int)__raw_readl(reg);
317 }
318
319 static 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 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
326 /* loop count is to avoid the lock-up */
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
336 static 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
351 static 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 /* wait for TX ready */
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
380 static void davinci_mcasp_start(struct davinci_audio_dev *dev, int stream)
381 {
382 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
383 if (dev->txnumevt) /* enable FIFO */
384 mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
385 FIFO_ENABLE);
386 mcasp_start_tx(dev);
387 } else {
388 if (dev->rxnumevt) /* enable FIFO */
389 mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
390 FIFO_ENABLE);
391 mcasp_start_rx(dev);
392 }
393 }
394
395 static 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
401 static 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
407 static void davinci_mcasp_stop(struct davinci_audio_dev *dev, int stream)
408 {
409 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
410 if (dev->txnumevt) /* disable FIFO */
411 mcasp_clr_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
412 FIFO_ENABLE);
413 mcasp_stop_tx(dev);
414 } else {
415 if (dev->rxnumevt) /* disable FIFO */
416 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
417 FIFO_ENABLE);
418 mcasp_stop_rx(dev);
419 }
420 }
421
422 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
423 unsigned int fmt)
424 {
425 struct davinci_audio_dev *dev = cpu_dai->private_data;
426 void __iomem *base = dev->base;
427
428 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
429 case SND_SOC_DAIFMT_CBS_CFS:
430 /* codec is clock and frame slave */
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 /* codec is clock master and frame slave */
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 /* codec is clock and frame master */
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
504 static 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
571 static 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 /* Default configuration */
578 mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
579
580 /* All PINS as McASP */
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
628 static 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 /* bit stream is MSB first with no delay */
641 /* DSP_B mode */
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 /* bit stream is MSB first with no delay */
657 /* DSP_B mode */
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 /* S/PDIF */
675 static void davinci_hw_dit_param(struct davinci_audio_dev *dev)
676 {
677 /* Set the PDIR for Serialiser as output */
678 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AFSX);
679
680 /* TXMASK for 24 bits */
681 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0x00FFFFFF);
682
683 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
684 and LSB first */
685 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
686 TXROT(6) | TXSSZ(15));
687
688 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
689 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
690 AFSXE | FSXMOD(0x180));
691
692 /* Set the TX tdm : for all the slots */
693 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
694
695 /* Set the TX clock controls : div = 1 and internal */
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 /* Only 44100 and 48000 are valid, both have the same setting */
702 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
703
704 /* Enable the DIT */
705 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
706 }
707
708 static 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 = cpu_dai->private_data;
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
761 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
762 int cmd, struct snd_soc_dai *cpu_dai)
763 {
764 struct snd_soc_pcm_runtime *rtd = substream->private_data;
765 struct davinci_audio_dev *dev = rtd->dai->cpu_dai->private_data;
766 int ret = 0;
767
768 switch (cmd) {
769 case SNDRV_PCM_TRIGGER_RESUME:
770 case SNDRV_PCM_TRIGGER_START:
771 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
772 if (!dev->clk_active) {
773 clk_enable(dev->clk);
774 dev->clk_active = 1;
775 }
776 davinci_mcasp_start(dev, substream->stream);
777 break;
778
779 case SNDRV_PCM_TRIGGER_SUSPEND:
780 davinci_mcasp_stop(dev, substream->stream);
781 if (dev->clk_active) {
782 clk_disable(dev->clk);
783 dev->clk_active = 0;
784 }
785
786 break;
787
788 case SNDRV_PCM_TRIGGER_STOP:
789 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
790 davinci_mcasp_stop(dev, substream->stream);
791 break;
792
793 default:
794 ret = -EINVAL;
795 }
796
797 return ret;
798 }
799
800 static struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
801 .trigger = davinci_mcasp_trigger,
802 .hw_params = davinci_mcasp_hw_params,
803 .set_fmt = davinci_mcasp_set_dai_fmt,
804
805 };
806
807 struct snd_soc_dai davinci_mcasp_dai[] = {
808 {
809 .name = "davinci-i2s",
810 .id = 0,
811 .playback = {
812 .channels_min = 2,
813 .channels_max = 2,
814 .rates = DAVINCI_MCASP_RATES,
815 .formats = SNDRV_PCM_FMTBIT_S8 |
816 SNDRV_PCM_FMTBIT_S16_LE |
817 SNDRV_PCM_FMTBIT_S32_LE,
818 },
819 .capture = {
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 .ops = &davinci_mcasp_dai_ops,
828
829 },
830 {
831 .name = "davinci-dit",
832 .id = 1,
833 .playback = {
834 .channels_min = 1,
835 .channels_max = 384,
836 .rates = DAVINCI_MCASP_RATES,
837 .formats = SNDRV_PCM_FMTBIT_S16_LE,
838 },
839 .ops = &davinci_mcasp_dai_ops,
840 },
841
842 };
843 EXPORT_SYMBOL_GPL(davinci_mcasp_dai);
844
845 static int davinci_mcasp_probe(struct platform_device *pdev)
846 {
847 struct davinci_pcm_dma_params *dma_data;
848 struct resource *mem, *ioarea, *res;
849 struct snd_platform_data *pdata;
850 struct davinci_audio_dev *dev;
851 int ret = 0;
852
853 dev = kzalloc(sizeof(struct davinci_audio_dev), GFP_KERNEL);
854 if (!dev)
855 return -ENOMEM;
856
857 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
858 if (!mem) {
859 dev_err(&pdev->dev, "no mem resource?\n");
860 ret = -ENODEV;
861 goto err_release_data;
862 }
863
864 ioarea = request_mem_region(mem->start,
865 (mem->end - mem->start) + 1, pdev->name);
866 if (!ioarea) {
867 dev_err(&pdev->dev, "Audio region already claimed\n");
868 ret = -EBUSY;
869 goto err_release_data;
870 }
871
872 pdata = pdev->dev.platform_data;
873 dev->clk = clk_get(&pdev->dev, NULL);
874 if (IS_ERR(dev->clk)) {
875 ret = -ENODEV;
876 goto err_release_region;
877 }
878
879 clk_enable(dev->clk);
880 dev->clk_active = 1;
881
882 dev->base = (void __iomem *)IO_ADDRESS(mem->start);
883 dev->op_mode = pdata->op_mode;
884 dev->tdm_slots = pdata->tdm_slots;
885 dev->num_serializer = pdata->num_serializer;
886 dev->serial_dir = pdata->serial_dir;
887 dev->codec_fmt = pdata->codec_fmt;
888 dev->version = pdata->version;
889 dev->txnumevt = pdata->txnumevt;
890 dev->rxnumevt = pdata->rxnumevt;
891
892 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
893 dma_data->eventq_no = pdata->eventq_no;
894 dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
895 io_v2p(dev->base));
896
897 /* first TX, then RX */
898 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
899 if (!res) {
900 dev_err(&pdev->dev, "no DMA resource\n");
901 goto err_release_region;
902 }
903
904 dma_data->channel = res->start;
905
906 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
907 dma_data->eventq_no = pdata->eventq_no;
908 dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
909 io_v2p(dev->base));
910
911 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
912 if (!res) {
913 dev_err(&pdev->dev, "no DMA resource\n");
914 goto err_release_region;
915 }
916
917 dma_data->channel = res->start;
918 davinci_mcasp_dai[pdata->op_mode].private_data = dev;
919 davinci_mcasp_dai[pdata->op_mode].capture.dma_data = dev->dma_params;
920 davinci_mcasp_dai[pdata->op_mode].playback.dma_data = dev->dma_params;
921 davinci_mcasp_dai[pdata->op_mode].dev = &pdev->dev;
922 ret = snd_soc_register_dai(&davinci_mcasp_dai[pdata->op_mode]);
923
924 if (ret != 0)
925 goto err_release_region;
926 return 0;
927
928 err_release_region:
929 release_mem_region(mem->start, (mem->end - mem->start) + 1);
930 err_release_data:
931 kfree(dev);
932
933 return ret;
934 }
935
936 static int davinci_mcasp_remove(struct platform_device *pdev)
937 {
938 struct snd_platform_data *pdata = pdev->dev.platform_data;
939 struct davinci_audio_dev *dev;
940 struct resource *mem;
941
942 snd_soc_unregister_dai(&davinci_mcasp_dai[pdata->op_mode]);
943 dev = davinci_mcasp_dai[pdata->op_mode].private_data;
944 clk_disable(dev->clk);
945 clk_put(dev->clk);
946 dev->clk = NULL;
947
948 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
949 release_mem_region(mem->start, (mem->end - mem->start) + 1);
950
951 kfree(dev);
952
953 return 0;
954 }
955
956 static struct platform_driver davinci_mcasp_driver = {
957 .probe = davinci_mcasp_probe,
958 .remove = davinci_mcasp_remove,
959 .driver = {
960 .name = "davinci-mcasp",
961 .owner = THIS_MODULE,
962 },
963 };
964
965 static int __init davinci_mcasp_init(void)
966 {
967 return platform_driver_register(&davinci_mcasp_driver);
968 }
969 module_init(davinci_mcasp_init);
970
971 static void __exit davinci_mcasp_exit(void)
972 {
973 platform_driver_unregister(&davinci_mcasp_driver);
974 }
975 module_exit(davinci_mcasp_exit);
976
977 MODULE_AUTHOR("Steve Chen");
978 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
979 MODULE_LICENSE("GPL");
980
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