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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / sound / soc / davinci / davinci-mcasp.c
blob8566238db2a5ea7a3f807f2cb341826703167bec
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 = 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 /* 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,
438 ACLKX | AHCLKX | AFSX);
439 break;
440 case SND_SOC_DAIFMT_CBM_CFS:
441 /* codec is clock master and frame slave */
442 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
443 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
444
445 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
446 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
447
448 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
449 ACLKX | ACLKR);
450 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
451 AFSX | AFSR);
452 break;
453 case SND_SOC_DAIFMT_CBM_CFM:
454 /* codec is clock and frame master */
455 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
456 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
457
458 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
459 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
460
461 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
462 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
463 break;
464
465 default:
466 return -EINVAL;
467 }
468
469 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
470 case SND_SOC_DAIFMT_IB_NF:
471 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
472 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
473
474 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
475 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
476 break;
477
478 case SND_SOC_DAIFMT_NB_IF:
479 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
480 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
481
482 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
483 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
484 break;
485
486 case SND_SOC_DAIFMT_IB_IF:
487 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
488 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
489
490 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
491 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
492 break;
493
494 case SND_SOC_DAIFMT_NB_NF:
495 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
496 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
497
498 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
499 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
500 break;
501
502 default:
503 return -EINVAL;
504 }
505
506 return 0;
507 }
508
509 static int davinci_config_channel_size(struct davinci_audio_dev *dev,
510 int channel_size)
511 {
512 u32 fmt = 0;
513 u32 mask, rotate;
514
515 switch (channel_size) {
516 case DAVINCI_AUDIO_WORD_8:
517 fmt = 0x03;
518 rotate = 6;
519 mask = 0x000000ff;
520 break;
521
522 case DAVINCI_AUDIO_WORD_12:
523 fmt = 0x05;
524 rotate = 5;
525 mask = 0x00000fff;
526 break;
527
528 case DAVINCI_AUDIO_WORD_16:
529 fmt = 0x07;
530 rotate = 4;
531 mask = 0x0000ffff;
532 break;
533
534 case DAVINCI_AUDIO_WORD_20:
535 fmt = 0x09;
536 rotate = 3;
537 mask = 0x000fffff;
538 break;
539
540 case DAVINCI_AUDIO_WORD_24:
541 fmt = 0x0B;
542 rotate = 2;
543 mask = 0x00ffffff;
544 break;
545
546 case DAVINCI_AUDIO_WORD_28:
547 fmt = 0x0D;
548 rotate = 1;
549 mask = 0x0fffffff;
550 break;
551
552 case DAVINCI_AUDIO_WORD_32:
553 fmt = 0x0F;
554 rotate = 0;
555 mask = 0xffffffff;
556 break;
557
558 default:
559 return -EINVAL;
560 }
561
562 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
563 RXSSZ(fmt), RXSSZ(0x0F));
564 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
565 TXSSZ(fmt), TXSSZ(0x0F));
566 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXROT(rotate),
567 TXROT(7));
568 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXROT(rotate),
569 RXROT(7));
570 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, mask);
571 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, mask);
572
573 return 0;
574 }
575
576 static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
577 {
578 int i;
579 u8 tx_ser = 0;
580 u8 rx_ser = 0;
581
582 /* Default configuration */
583 mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
584
585 /* All PINS as McASP */
586 mcasp_set_reg(dev->base + DAVINCI_MCASP_PFUNC_REG, 0x00000000);
587
588 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
589 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
590 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG,
591 TXDATADMADIS);
592 } else {
593 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
594 mcasp_clr_bits(dev->base + DAVINCI_MCASP_REVTCTL_REG,
595 RXDATADMADIS);
596 }
597
598 for (i = 0; i < dev->num_serializer; i++) {
599 mcasp_set_bits(dev->base + DAVINCI_MCASP_XRSRCTL_REG(i),
600 dev->serial_dir[i]);
601 if (dev->serial_dir[i] == TX_MODE) {
602 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
603 AXR(i));
604 tx_ser++;
605 } else if (dev->serial_dir[i] == RX_MODE) {
606 mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
607 AXR(i));
608 rx_ser++;
609 }
610 }
611
612 if (dev->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
613 if (dev->txnumevt * tx_ser > 64)
614 dev->txnumevt = 1;
615
616 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, tx_ser,
617 NUMDMA_MASK);
618 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
619 ((dev->txnumevt * tx_ser) << 8), NUMEVT_MASK);
620 }
621
622 if (dev->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
623 if (dev->rxnumevt * rx_ser > 64)
624 dev->rxnumevt = 1;
625
626 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, rx_ser,
627 NUMDMA_MASK);
628 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
629 ((dev->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
630 }
631 }
632
633 static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
634 {
635 int i, active_slots;
636 u32 mask = 0;
637
638 active_slots = (dev->tdm_slots > 31) ? 32 : dev->tdm_slots;
639 for (i = 0; i < active_slots; i++)
640 mask |= (1 << i);
641
642 mcasp_clr_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
643
644 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
645 /* bit stream is MSB first with no delay */
646 /* DSP_B mode */
647 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG,
648 AHCLKXE);
649 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, mask);
650 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXORD);
651
652 if ((dev->tdm_slots >= 2) && (dev->tdm_slots <= 32))
653 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
654 FSXMOD(dev->tdm_slots), FSXMOD(0x1FF));
655 else
656 printk(KERN_ERR "playback tdm slot %d not supported\n",
657 dev->tdm_slots);
658
659 mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
660 } else {
661 /* bit stream is MSB first with no delay */
662 /* DSP_B mode */
663 mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXORD);
664 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG,
665 AHCLKRE);
666 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXTDM_REG, mask);
667
668 if ((dev->tdm_slots >= 2) && (dev->tdm_slots <= 32))
669 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG,
670 FSRMOD(dev->tdm_slots), FSRMOD(0x1FF));
671 else
672 printk(KERN_ERR "capture tdm slot %d not supported\n",
673 dev->tdm_slots);
674
675 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
676 }
677 }
678
679 /* S/PDIF */
680 static void davinci_hw_dit_param(struct davinci_audio_dev *dev)
681 {
682 /* Set the PDIR for Serialiser as output */
683 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AFSX);
684
685 /* TXMASK for 24 bits */
686 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0x00FFFFFF);
687
688 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
689 and LSB first */
690 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
691 TXROT(6) | TXSSZ(15));
692
693 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
694 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
695 AFSXE | FSXMOD(0x180));
696
697 /* Set the TX tdm : for all the slots */
698 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
699
700 /* Set the TX clock controls : div = 1 and internal */
701 mcasp_set_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG,
702 ACLKXE | TX_ASYNC);
703
704 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
705
706 /* Only 44100 and 48000 are valid, both have the same setting */
707 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
708
709 /* Enable the DIT */
710 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
711 }
712
713 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
714 struct snd_pcm_hw_params *params,
715 struct snd_soc_dai *cpu_dai)
716 {
717 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
718 struct davinci_pcm_dma_params *dma_params =
719 &dev->dma_params[substream->stream];
720 int word_length;
721 u8 fifo_level;
722
723 davinci_hw_common_param(dev, substream->stream);
724 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
725 fifo_level = dev->txnumevt;
726 else
727 fifo_level = dev->rxnumevt;
728
729 if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
730 davinci_hw_dit_param(dev);
731 else
732 davinci_hw_param(dev, substream->stream);
733
734 switch (params_format(params)) {
735 case SNDRV_PCM_FORMAT_S8:
736 dma_params->data_type = 1;
737 word_length = DAVINCI_AUDIO_WORD_8;
738 break;
739
740 case SNDRV_PCM_FORMAT_S16_LE:
741 dma_params->data_type = 2;
742 word_length = DAVINCI_AUDIO_WORD_16;
743 break;
744
745 case SNDRV_PCM_FORMAT_S32_LE:
746 dma_params->data_type = 4;
747 word_length = DAVINCI_AUDIO_WORD_32;
748 break;
749
750 default:
751 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
752 return -EINVAL;
753 }
754
755 if (dev->version == MCASP_VERSION_2 && !fifo_level)
756 dma_params->acnt = 4;
757 else
758 dma_params->acnt = dma_params->data_type;
759
760 dma_params->fifo_level = fifo_level;
761 davinci_config_channel_size(dev, word_length);
762
763 return 0;
764 }
765
766 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
767 int cmd, struct snd_soc_dai *cpu_dai)
768 {
769 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
770 int ret = 0;
771
772 switch (cmd) {
773 case SNDRV_PCM_TRIGGER_RESUME:
774 case SNDRV_PCM_TRIGGER_START:
775 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
776 if (!dev->clk_active) {
777 clk_enable(dev->clk);
778 dev->clk_active = 1;
779 }
780 davinci_mcasp_start(dev, substream->stream);
781 break;
782
783 case SNDRV_PCM_TRIGGER_SUSPEND:
784 davinci_mcasp_stop(dev, substream->stream);
785 if (dev->clk_active) {
786 clk_disable(dev->clk);
787 dev->clk_active = 0;
788 }
789
790 break;
791
792 case SNDRV_PCM_TRIGGER_STOP:
793 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
794 davinci_mcasp_stop(dev, substream->stream);
795 break;
796
797 default:
798 ret = -EINVAL;
799 }
800
801 return ret;
802 }
803
804 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
805 struct snd_soc_dai *dai)
806 {
807 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
808
809 snd_soc_dai_set_dma_data(dai, substream, dev->dma_params);
810 return 0;
811 }
812
813 static struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
814 .startup = davinci_mcasp_startup,
815 .trigger = davinci_mcasp_trigger,
816 .hw_params = davinci_mcasp_hw_params,
817 .set_fmt = davinci_mcasp_set_dai_fmt,
818
819 };
820
821 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
822 {
823 .name = "davinci-mcasp.0",
824 .playback = {
825 .channels_min = 2,
826 .channels_max = 2,
827 .rates = DAVINCI_MCASP_RATES,
828 .formats = SNDRV_PCM_FMTBIT_S8 |
829 SNDRV_PCM_FMTBIT_S16_LE |
830 SNDRV_PCM_FMTBIT_S32_LE,
831 },
832 .capture = {
833 .channels_min = 2,
834 .channels_max = 2,
835 .rates = DAVINCI_MCASP_RATES,
836 .formats = SNDRV_PCM_FMTBIT_S8 |
837 SNDRV_PCM_FMTBIT_S16_LE |
838 SNDRV_PCM_FMTBIT_S32_LE,
839 },
840 .ops = &davinci_mcasp_dai_ops,
841
842 },
843 {
844 "davinci-mcasp.1",
845 .playback = {
846 .channels_min = 1,
847 .channels_max = 384,
848 .rates = DAVINCI_MCASP_RATES,
849 .formats = SNDRV_PCM_FMTBIT_S16_LE,
850 },
851 .ops = &davinci_mcasp_dai_ops,
852 },
853
854 };
855
856 static int davinci_mcasp_probe(struct platform_device *pdev)
857 {
858 struct davinci_pcm_dma_params *dma_data;
859 struct resource *mem, *ioarea, *res;
860 struct snd_platform_data *pdata;
861 struct davinci_audio_dev *dev;
862 int ret = 0;
863
864 dev = kzalloc(sizeof(struct davinci_audio_dev), GFP_KERNEL);
865 if (!dev)
866 return -ENOMEM;
867
868 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
869 if (!mem) {
870 dev_err(&pdev->dev, "no mem resource?\n");
871 ret = -ENODEV;
872 goto err_release_data;
873 }
874
875 ioarea = request_mem_region(mem->start,
876 resource_size(mem), pdev->name);
877 if (!ioarea) {
878 dev_err(&pdev->dev, "Audio region already claimed\n");
879 ret = -EBUSY;
880 goto err_release_data;
881 }
882
883 pdata = pdev->dev.platform_data;
884 dev->clk = clk_get(&pdev->dev, NULL);
885 if (IS_ERR(dev->clk)) {
886 ret = -ENODEV;
887 goto err_release_region;
888 }
889
890 clk_enable(dev->clk);
891 dev->clk_active = 1;
892
893 dev->base = ioremap(mem->start, resource_size(mem));
894 if (!dev->base) {
895 dev_err(&pdev->dev, "ioremap failed\n");
896 ret = -ENOMEM;
897 goto err_release_clk;
898 }
899
900 dev->op_mode = pdata->op_mode;
901 dev->tdm_slots = pdata->tdm_slots;
902 dev->num_serializer = pdata->num_serializer;
903 dev->serial_dir = pdata->serial_dir;
904 dev->codec_fmt = pdata->codec_fmt;
905 dev->version = pdata->version;
906 dev->txnumevt = pdata->txnumevt;
907 dev->rxnumevt = pdata->rxnumevt;
908
909 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
910 dma_data->asp_chan_q = pdata->asp_chan_q;
911 dma_data->ram_chan_q = pdata->ram_chan_q;
912 dma_data->sram_size = pdata->sram_size_playback;
913 dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
914 mem->start);
915
916 /* first TX, then RX */
917 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
918 if (!res) {
919 dev_err(&pdev->dev, "no DMA resource\n");
920 ret = -ENODEV;
921 goto err_iounmap;
922 }
923
924 dma_data->channel = res->start;
925
926 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
927 dma_data->asp_chan_q = pdata->asp_chan_q;
928 dma_data->ram_chan_q = pdata->ram_chan_q;
929 dma_data->sram_size = pdata->sram_size_capture;
930 dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
931 mem->start);
932
933 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
934 if (!res) {
935 dev_err(&pdev->dev, "no DMA resource\n");
936 ret = -ENODEV;
937 goto err_iounmap;
938 }
939
940 dma_data->channel = res->start;
941 dev_set_drvdata(&pdev->dev, dev);
942 ret = snd_soc_register_dai(&pdev->dev, &davinci_mcasp_dai[pdata->op_mode]);
943
944 if (ret != 0)
945 goto err_iounmap;
946 return 0;
947
948 err_iounmap:
949 iounmap(dev->base);
950 err_release_clk:
951 clk_disable(dev->clk);
952 clk_put(dev->clk);
953 err_release_region:
954 release_mem_region(mem->start, resource_size(mem));
955 err_release_data:
956 kfree(dev);
957
958 return ret;
959 }
960
961 static int davinci_mcasp_remove(struct platform_device *pdev)
962 {
963 struct davinci_audio_dev *dev = dev_get_drvdata(&pdev->dev);
964 struct resource *mem;
965
966 snd_soc_unregister_dai(&pdev->dev);
967 clk_disable(dev->clk);
968 clk_put(dev->clk);
969 dev->clk = NULL;
970
971 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
972 release_mem_region(mem->start, resource_size(mem));
973
974 kfree(dev);
975
976 return 0;
977 }
978
979 static struct platform_driver davinci_mcasp_driver = {
980 .probe = davinci_mcasp_probe,
981 .remove = davinci_mcasp_remove,
982 .driver = {
983 .name = "davinci-mcasp",
984 .owner = THIS_MODULE,
985 },
986 };
987
988 static int __init davinci_mcasp_init(void)
989 {
990 return platform_driver_register(&davinci_mcasp_driver);
991 }
992 module_init(davinci_mcasp_init);
993
994 static void __exit davinci_mcasp_exit(void)
995 {
996 platform_driver_unregister(&davinci_mcasp_driver);
997 }
998 module_exit(davinci_mcasp_exit);
999
1000 MODULE_AUTHOR("Steve Chen");
1001 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1002 MODULE_LICENSE("GPL");
1003
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