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omap: Runtime detection of OMAP35x devices
[linux-ginger.git] / sound / soc / davinci / davinci-mcasp.c
blob5d1f98a4c97869fa41d446327a879f383b11136c
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/delay.h>
22 #include <linux/io.h>
23 #include <linux/clk.h>
24
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/initval.h>
29 #include <sound/soc.h>
30
31 #include "davinci-pcm.h"
32 #include "davinci-mcasp.h"
33
34 /*
35 * McASP register definitions
36 */
37 #define DAVINCI_MCASP_PID_REG 0x00
38 #define DAVINCI_MCASP_PWREMUMGT_REG 0x04
39
40 #define DAVINCI_MCASP_PFUNC_REG 0x10
41 #define DAVINCI_MCASP_PDIR_REG 0x14
42 #define DAVINCI_MCASP_PDOUT_REG 0x18
43 #define DAVINCI_MCASP_PDSET_REG 0x1c
44
45 #define DAVINCI_MCASP_PDCLR_REG 0x20
46
47 #define DAVINCI_MCASP_TLGC_REG 0x30
48 #define DAVINCI_MCASP_TLMR_REG 0x34
49
50 #define DAVINCI_MCASP_GBLCTL_REG 0x44
51 #define DAVINCI_MCASP_AMUTE_REG 0x48
52 #define DAVINCI_MCASP_LBCTL_REG 0x4c
53
54 #define DAVINCI_MCASP_TXDITCTL_REG 0x50
55
56 #define DAVINCI_MCASP_GBLCTLR_REG 0x60
57 #define DAVINCI_MCASP_RXMASK_REG 0x64
58 #define DAVINCI_MCASP_RXFMT_REG 0x68
59 #define DAVINCI_MCASP_RXFMCTL_REG 0x6c
60
61 #define DAVINCI_MCASP_ACLKRCTL_REG 0x70
62 #define DAVINCI_MCASP_AHCLKRCTL_REG 0x74
63 #define DAVINCI_MCASP_RXTDM_REG 0x78
64 #define DAVINCI_MCASP_EVTCTLR_REG 0x7c
65
66 #define DAVINCI_MCASP_RXSTAT_REG 0x80
67 #define DAVINCI_MCASP_RXTDMSLOT_REG 0x84
68 #define DAVINCI_MCASP_RXCLKCHK_REG 0x88
69 #define DAVINCI_MCASP_REVTCTL_REG 0x8c
70
71 #define DAVINCI_MCASP_GBLCTLX_REG 0xa0
72 #define DAVINCI_MCASP_TXMASK_REG 0xa4
73 #define DAVINCI_MCASP_TXFMT_REG 0xa8
74 #define DAVINCI_MCASP_TXFMCTL_REG 0xac
75
76 #define DAVINCI_MCASP_ACLKXCTL_REG 0xb0
77 #define DAVINCI_MCASP_AHCLKXCTL_REG 0xb4
78 #define DAVINCI_MCASP_TXTDM_REG 0xb8
79 #define DAVINCI_MCASP_EVTCTLX_REG 0xbc
80
81 #define DAVINCI_MCASP_TXSTAT_REG 0xc0
82 #define DAVINCI_MCASP_TXTDMSLOT_REG 0xc4
83 #define DAVINCI_MCASP_TXCLKCHK_REG 0xc8
84 #define DAVINCI_MCASP_XEVTCTL_REG 0xcc
85
86 /* Left(even TDM Slot) Channel Status Register File */
87 #define DAVINCI_MCASP_DITCSRA_REG 0x100
88 /* Right(odd TDM slot) Channel Status Register File */
89 #define DAVINCI_MCASP_DITCSRB_REG 0x118
90 /* Left(even TDM slot) User Data Register File */
91 #define DAVINCI_MCASP_DITUDRA_REG 0x130
92 /* Right(odd TDM Slot) User Data Register File */
93 #define DAVINCI_MCASP_DITUDRB_REG 0x148
94
95 /* Serializer n Control Register */
96 #define DAVINCI_MCASP_XRSRCTL_BASE_REG 0x180
97 #define DAVINCI_MCASP_XRSRCTL_REG(n) (DAVINCI_MCASP_XRSRCTL_BASE_REG + \
98 (n << 2))
99
100 /* Transmit Buffer for Serializer n */
101 #define DAVINCI_MCASP_TXBUF_REG 0x200
102 /* Receive Buffer for Serializer n */
103 #define DAVINCI_MCASP_RXBUF_REG 0x280
104
105 /* McASP FIFO Registers */
106 #define DAVINCI_MCASP_WFIFOCTL (0x1010)
107 #define DAVINCI_MCASP_WFIFOSTS (0x1014)
108 #define DAVINCI_MCASP_RFIFOCTL (0x1018)
109 #define DAVINCI_MCASP_RFIFOSTS (0x101C)
110
111 /*
112 * DAVINCI_MCASP_PWREMUMGT_REG - Power Down and Emulation Management
113 * Register Bits
114 */
115 #define MCASP_FREE BIT(0)
116 #define MCASP_SOFT BIT(1)
117
118 /*
119 * DAVINCI_MCASP_PFUNC_REG - Pin Function / GPIO Enable Register Bits
120 */
121 #define AXR(n) (1<<n)
122 #define PFUNC_AMUTE BIT(25)
123 #define ACLKX BIT(26)
124 #define AHCLKX BIT(27)
125 #define AFSX BIT(28)
126 #define ACLKR BIT(29)
127 #define AHCLKR BIT(30)
128 #define AFSR BIT(31)
129
130 /*
131 * DAVINCI_MCASP_PDIR_REG - Pin Direction Register Bits
132 */
133 #define AXR(n) (1<<n)
134 #define PDIR_AMUTE BIT(25)
135 #define ACLKX BIT(26)
136 #define AHCLKX BIT(27)
137 #define AFSX BIT(28)
138 #define ACLKR BIT(29)
139 #define AHCLKR BIT(30)
140 #define AFSR BIT(31)
141
142 /*
143 * DAVINCI_MCASP_TXDITCTL_REG - Transmit DIT Control Register Bits
144 */
145 #define DITEN BIT(0) /* Transmit DIT mode enable/disable */
146 #define VA BIT(2)
147 #define VB BIT(3)
148
149 /*
150 * DAVINCI_MCASP_TXFMT_REG - Transmit Bitstream Format Register Bits
151 */
152 #define TXROT(val) (val)
153 #define TXSEL BIT(3)
154 #define TXSSZ(val) (val<<4)
155 #define TXPBIT(val) (val<<8)
156 #define TXPAD(val) (val<<13)
157 #define TXORD BIT(15)
158 #define FSXDLY(val) (val<<16)
159
160 /*
161 * DAVINCI_MCASP_RXFMT_REG - Receive Bitstream Format Register Bits
162 */
163 #define RXROT(val) (val)
164 #define RXSEL BIT(3)
165 #define RXSSZ(val) (val<<4)
166 #define RXPBIT(val) (val<<8)
167 #define RXPAD(val) (val<<13)
168 #define RXORD BIT(15)
169 #define FSRDLY(val) (val<<16)
170
171 /*
172 * DAVINCI_MCASP_TXFMCTL_REG - Transmit Frame Control Register Bits
173 */
174 #define FSXPOL BIT(0)
175 #define AFSXE BIT(1)
176 #define FSXDUR BIT(4)
177 #define FSXMOD(val) (val<<7)
178
179 /*
180 * DAVINCI_MCASP_RXFMCTL_REG - Receive Frame Control Register Bits
181 */
182 #define FSRPOL BIT(0)
183 #define AFSRE BIT(1)
184 #define FSRDUR BIT(4)
185 #define FSRMOD(val) (val<<7)
186
187 /*
188 * DAVINCI_MCASP_ACLKXCTL_REG - Transmit Clock Control Register Bits
189 */
190 #define ACLKXDIV(val) (val)
191 #define ACLKXE BIT(5)
192 #define TX_ASYNC BIT(6)
193 #define ACLKXPOL BIT(7)
194
195 /*
196 * DAVINCI_MCASP_ACLKRCTL_REG Receive Clock Control Register Bits
197 */
198 #define ACLKRDIV(val) (val)
199 #define ACLKRE BIT(5)
200 #define RX_ASYNC BIT(6)
201 #define ACLKRPOL BIT(7)
202
203 /*
204 * DAVINCI_MCASP_AHCLKXCTL_REG - High Frequency Transmit Clock Control
205 * Register Bits
206 */
207 #define AHCLKXDIV(val) (val)
208 #define AHCLKXPOL BIT(14)
209 #define AHCLKXE BIT(15)
210
211 /*
212 * DAVINCI_MCASP_AHCLKRCTL_REG - High Frequency Receive Clock Control
213 * Register Bits
214 */
215 #define AHCLKRDIV(val) (val)
216 #define AHCLKRPOL BIT(14)
217 #define AHCLKRE BIT(15)
218
219 /*
220 * DAVINCI_MCASP_XRSRCTL_BASE_REG - Serializer Control Register Bits
221 */
222 #define MODE(val) (val)
223 #define DISMOD (val)(val<<2)
224 #define TXSTATE BIT(4)
225 #define RXSTATE BIT(5)
226
227 /*
228 * DAVINCI_MCASP_LBCTL_REG - Loop Back Control Register Bits
229 */
230 #define LBEN BIT(0)
231 #define LBORD BIT(1)
232 #define LBGENMODE(val) (val<<2)
233
234 /*
235 * DAVINCI_MCASP_TXTDMSLOT_REG - Transmit TDM Slot Register configuration
236 */
237 #define TXTDMS(n) (1<<n)
238
239 /*
240 * DAVINCI_MCASP_RXTDMSLOT_REG - Receive TDM Slot Register configuration
241 */
242 #define RXTDMS(n) (1<<n)
243
244 /*
245 * DAVINCI_MCASP_GBLCTL_REG - Global Control Register Bits
246 */
247 #define RXCLKRST BIT(0) /* Receiver Clock Divider Reset */
248 #define RXHCLKRST BIT(1) /* Receiver High Frequency Clock Divider */
249 #define RXSERCLR BIT(2) /* Receiver Serializer Clear */
250 #define RXSMRST BIT(3) /* Receiver State Machine Reset */
251 #define RXFSRST BIT(4) /* Frame Sync Generator Reset */
252 #define TXCLKRST BIT(8) /* Transmitter Clock Divider Reset */
253 #define TXHCLKRST BIT(9) /* Transmitter High Frequency Clock Divider*/
254 #define TXSERCLR BIT(10) /* Transmit Serializer Clear */
255 #define TXSMRST BIT(11) /* Transmitter State Machine Reset */
256 #define TXFSRST BIT(12) /* Frame Sync Generator Reset */
257
258 /*
259 * DAVINCI_MCASP_AMUTE_REG - Mute Control Register Bits
260 */
261 #define MUTENA(val) (val)
262 #define MUTEINPOL BIT(2)
263 #define MUTEINENA BIT(3)
264 #define MUTEIN BIT(4)
265 #define MUTER BIT(5)
266 #define MUTEX BIT(6)
267 #define MUTEFSR BIT(7)
268 #define MUTEFSX BIT(8)
269 #define MUTEBADCLKR BIT(9)
270 #define MUTEBADCLKX BIT(10)
271 #define MUTERXDMAERR BIT(11)
272 #define MUTETXDMAERR BIT(12)
273
274 /*
275 * DAVINCI_MCASP_REVTCTL_REG - Receiver DMA Event Control Register bits
276 */
277 #define RXDATADMADIS BIT(0)
278
279 /*
280 * DAVINCI_MCASP_XEVTCTL_REG - Transmitter DMA Event Control Register bits
281 */
282 #define TXDATADMADIS BIT(0)
283
284 /*
285 * DAVINCI_MCASP_W[R]FIFOCTL - Write/Read FIFO Control Register bits
286 */
287 #define FIFO_ENABLE BIT(16)
288 #define NUMEVT_MASK (0xFF << 8)
289 #define NUMDMA_MASK (0xFF)
290
291 #define DAVINCI_MCASP_NUM_SERIALIZER 16
292
293 static inline void mcasp_set_bits(void __iomem *reg, u32 val)
294 {
295 __raw_writel(__raw_readl(reg) | val, reg);
296 }
297
298 static inline void mcasp_clr_bits(void __iomem *reg, u32 val)
299 {
300 __raw_writel((__raw_readl(reg) & ~(val)), reg);
301 }
302
303 static inline void mcasp_mod_bits(void __iomem *reg, u32 val, u32 mask)
304 {
305 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
306 }
307
308 static inline void mcasp_set_reg(void __iomem *reg, u32 val)
309 {
310 __raw_writel(val, reg);
311 }
312
313 static inline u32 mcasp_get_reg(void __iomem *reg)
314 {
315 return (unsigned int)__raw_readl(reg);
316 }
317
318 static inline void mcasp_set_ctl_reg(void __iomem *regs, u32 val)
319 {
320 int i = 0;
321
322 mcasp_set_bits(regs, val);
323
324 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
325 /* loop count is to avoid the lock-up */
326 for (i = 0; i < 1000; i++) {
327 if ((mcasp_get_reg(regs) & val) == val)
328 break;
329 }
330
331 if (i == 1000 && ((mcasp_get_reg(regs) & val) != val))
332 printk(KERN_ERR "GBLCTL write error\n");
333 }
334
335 static void mcasp_start_rx(struct davinci_audio_dev *dev)
336 {
337 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
338 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
339 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
340 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXBUF_REG, 0);
341
342 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
343 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
344 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXBUF_REG, 0);
345
346 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
347 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
348 }
349
350 static void mcasp_start_tx(struct davinci_audio_dev *dev)
351 {
352 u8 offset = 0, i;
353 u32 cnt;
354
355 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
356 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
357 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
358 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
359
360 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
361 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
362 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
363 for (i = 0; i < dev->num_serializer; i++) {
364 if (dev->serial_dir[i] == TX_MODE) {
365 offset = i;
366 break;
367 }
368 }
369
370 /* wait for TX ready */
371 cnt = 0;
372 while (!(mcasp_get_reg(dev->base + DAVINCI_MCASP_XRSRCTL_REG(offset)) &
373 TXSTATE) && (cnt < 100000))
374 cnt++;
375
376 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
377 }
378
379 static void davinci_mcasp_start(struct davinci_audio_dev *dev, int stream)
380 {
381 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
382 if (dev->txnumevt) /* enable FIFO */
383 mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
384 FIFO_ENABLE);
385 mcasp_start_tx(dev);
386 } else {
387 if (dev->rxnumevt) /* enable FIFO */
388 mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
389 FIFO_ENABLE);
390 mcasp_start_rx(dev);
391 }
392 }
393
394 static void mcasp_stop_rx(struct davinci_audio_dev *dev)
395 {
396 mcasp_set_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, 0);
397 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
398 }
399
400 static void mcasp_stop_tx(struct davinci_audio_dev *dev)
401 {
402 mcasp_set_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, 0);
403 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
404 }
405
406 static void davinci_mcasp_stop(struct davinci_audio_dev *dev, int stream)
407 {
408 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
409 if (dev->txnumevt) /* disable FIFO */
410 mcasp_clr_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
411 FIFO_ENABLE);
412 mcasp_stop_tx(dev);
413 } else {
414 if (dev->rxnumevt) /* disable FIFO */
415 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
416 FIFO_ENABLE);
417 mcasp_stop_rx(dev);
418 }
419 }
420
421 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
422 unsigned int fmt)
423 {
424 struct davinci_audio_dev *dev = cpu_dai->private_data;
425 void __iomem *base = dev->base;
426
427 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
428 case SND_SOC_DAIFMT_CBS_CFS:
429 /* codec is clock and frame slave */
430 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
431 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
432
433 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
434 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
435
436 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x7 << 26));
437 break;
438 case SND_SOC_DAIFMT_CBM_CFS:
439 /* codec is clock master and frame slave */
440 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
441 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
442
443 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
444 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
445
446 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, (0x2d << 26));
447 break;
448 case SND_SOC_DAIFMT_CBM_CFM:
449 /* codec is clock and frame master */
450 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
451 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
452
453 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
454 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
455
456 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG, (0x3f << 26));
457 break;
458
459 default:
460 return -EINVAL;
461 }
462
463 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
464 case SND_SOC_DAIFMT_IB_NF:
465 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
466 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
467
468 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
469 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
470 break;
471
472 case SND_SOC_DAIFMT_NB_IF:
473 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
474 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
475
476 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
477 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
478 break;
479
480 case SND_SOC_DAIFMT_IB_IF:
481 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
482 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
483
484 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
485 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
486 break;
487
488 case SND_SOC_DAIFMT_NB_NF:
489 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
490 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
491
492 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
493 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
494 break;
495
496 default:
497 return -EINVAL;
498 }
499
500 return 0;
501 }
502
503 static int davinci_config_channel_size(struct davinci_audio_dev *dev,
504 int channel_size)
505 {
506 u32 fmt = 0;
507 u32 mask, rotate;
508
509 switch (channel_size) {
510 case DAVINCI_AUDIO_WORD_8:
511 fmt = 0x03;
512 rotate = 6;
513 mask = 0x000000ff;
514 break;
515
516 case DAVINCI_AUDIO_WORD_12:
517 fmt = 0x05;
518 rotate = 5;
519 mask = 0x00000fff;
520 break;
521
522 case DAVINCI_AUDIO_WORD_16:
523 fmt = 0x07;
524 rotate = 4;
525 mask = 0x0000ffff;
526 break;
527
528 case DAVINCI_AUDIO_WORD_20:
529 fmt = 0x09;
530 rotate = 3;
531 mask = 0x000fffff;
532 break;
533
534 case DAVINCI_AUDIO_WORD_24:
535 fmt = 0x0B;
536 rotate = 2;
537 mask = 0x00ffffff;
538 break;
539
540 case DAVINCI_AUDIO_WORD_28:
541 fmt = 0x0D;
542 rotate = 1;
543 mask = 0x0fffffff;
544 break;
545
546 case DAVINCI_AUDIO_WORD_32:
547 fmt = 0x0F;
548 rotate = 0;
549 mask = 0xffffffff;
550 break;
551
552 default:
553 return -EINVAL;
554 }
555
556 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
557 RXSSZ(fmt), RXSSZ(0x0F));
558 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
559 TXSSZ(fmt), TXSSZ(0x0F));
560 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXROT(rotate),
561 TXROT(7));
562 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXROT(rotate),
563 RXROT(7));
564 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, mask);
565 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, mask);
566
567 return 0;
568 }
569
570 static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
571 {
572 int i;
573 u8 tx_ser = 0;
574 u8 rx_ser = 0;
575
576 /* Default configuration */
577 mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
578
579 /* All PINS as McASP */
580 mcasp_set_reg(dev->base + DAVINCI_MCASP_PFUNC_REG, 0x00000000);
581
582 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
583 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
584 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG,
585 TXDATADMADIS);
586 } else {
587 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
588 mcasp_clr_bits(dev->base + DAVINCI_MCASP_REVTCTL_REG,
589 RXDATADMADIS);
590 }
591
592 for (i = 0; i < dev->num_serializer; i++) {
593 mcasp_set_bits(dev->base + DAVINCI_MCASP_XRSRCTL_REG(i),
594 dev->serial_dir[i]);
595 if (dev->serial_dir[i] == TX_MODE) {
596 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
597 AXR(i));
598 tx_ser++;
599 } else if (dev->serial_dir[i] == RX_MODE) {
600 mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
601 AXR(i));
602 rx_ser++;
603 }
604 }
605
606 if (dev->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
607 if (dev->txnumevt * tx_ser > 64)
608 dev->txnumevt = 1;
609
610 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, tx_ser,
611 NUMDMA_MASK);
612 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
613 ((dev->txnumevt * tx_ser) << 8), NUMEVT_MASK);
614 mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
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 mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
626 }
627 }
628
629 static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
630 {
631 int i, active_slots;
632 u32 mask = 0;
633
634 active_slots = (dev->tdm_slots > 31) ? 32 : dev->tdm_slots;
635 for (i = 0; i < active_slots; i++)
636 mask |= (1 << i);
637
638 mcasp_clr_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
639
640 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
641 /* bit stream is MSB first with no delay */
642 /* DSP_B mode */
643 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG,
644 AHCLKXE);
645 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, mask);
646 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXORD);
647
648 if ((dev->tdm_slots >= 2) || (dev->tdm_slots <= 32))
649 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
650 FSXMOD(dev->tdm_slots), FSXMOD(0x1FF));
651 else
652 printk(KERN_ERR "playback tdm slot %d not supported\n",
653 dev->tdm_slots);
654
655 mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
656 } else {
657 /* bit stream is MSB first with no delay */
658 /* DSP_B mode */
659 mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXORD);
660 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG,
661 AHCLKRE);
662 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXTDM_REG, mask);
663
664 if ((dev->tdm_slots >= 2) || (dev->tdm_slots <= 32))
665 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG,
666 FSRMOD(dev->tdm_slots), FSRMOD(0x1FF));
667 else
668 printk(KERN_ERR "capture tdm slot %d not supported\n",
669 dev->tdm_slots);
670
671 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
672 }
673 }
674
675 /* S/PDIF */
676 static void davinci_hw_dit_param(struct davinci_audio_dev *dev)
677 {
678 /* Set the PDIR for Serialiser as output */
679 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AFSX);
680
681 /* TXMASK for 24 bits */
682 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0x00FFFFFF);
683
684 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
685 and LSB first */
686 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
687 TXROT(6) | TXSSZ(15));
688
689 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
690 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
691 AFSXE | FSXMOD(0x180));
692
693 /* Set the TX tdm : for all the slots */
694 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
695
696 /* Set the TX clock controls : div = 1 and internal */
697 mcasp_set_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG,
698 ACLKXE | TX_ASYNC);
699
700 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
701
702 /* Only 44100 and 48000 are valid, both have the same setting */
703 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
704
705 /* Enable the DIT */
706 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
707 }
708
709 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
710 struct snd_pcm_hw_params *params,
711 struct snd_soc_dai *cpu_dai)
712 {
713 struct davinci_audio_dev *dev = cpu_dai->private_data;
714 struct davinci_pcm_dma_params *dma_params =
715 &dev->dma_params[substream->stream];
716 int word_length;
717 u8 numevt;
718
719 davinci_hw_common_param(dev, substream->stream);
720 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
721 numevt = dev->txnumevt;
722 else
723 numevt = dev->rxnumevt;
724
725 if (!numevt)
726 numevt = 1;
727
728 if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
729 davinci_hw_dit_param(dev);
730 else
731 davinci_hw_param(dev, substream->stream);
732
733 switch (params_format(params)) {
734 case SNDRV_PCM_FORMAT_S8:
735 dma_params->data_type = 1;
736 word_length = DAVINCI_AUDIO_WORD_8;
737 break;
738
739 case SNDRV_PCM_FORMAT_S16_LE:
740 dma_params->data_type = 2;
741 word_length = DAVINCI_AUDIO_WORD_16;
742 break;
743
744 case SNDRV_PCM_FORMAT_S32_LE:
745 dma_params->data_type = 4;
746 word_length = DAVINCI_AUDIO_WORD_32;
747 break;
748
749 default:
750 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
751 return -EINVAL;
752 }
753
754 if (dev->version == MCASP_VERSION_2) {
755 dma_params->data_type *= numevt;
756 dma_params->acnt = 4 * numevt;
757 } else
758 dma_params->acnt = dma_params->data_type;
759
760 davinci_config_channel_size(dev, word_length);
761
762 return 0;
763 }
764
765 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
766 int cmd, struct snd_soc_dai *cpu_dai)
767 {
768 struct snd_soc_pcm_runtime *rtd = substream->private_data;
769 struct davinci_audio_dev *dev = rtd->dai->cpu_dai->private_data;
770 int ret = 0;
771
772 switch (cmd) {
773 case SNDRV_PCM_TRIGGER_START:
774 case SNDRV_PCM_TRIGGER_RESUME:
775 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
776 davinci_mcasp_start(dev, substream->stream);
777 break;
778
779 case SNDRV_PCM_TRIGGER_STOP:
780 case SNDRV_PCM_TRIGGER_SUSPEND:
781 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
782 davinci_mcasp_stop(dev, substream->stream);
783 break;
784
785 default:
786 ret = -EINVAL;
787 }
788
789 return ret;
790 }
791
792 static struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
793 .trigger = davinci_mcasp_trigger,
794 .hw_params = davinci_mcasp_hw_params,
795 .set_fmt = davinci_mcasp_set_dai_fmt,
796
797 };
798
799 struct snd_soc_dai davinci_mcasp_dai[] = {
800 {
801 .name = "davinci-i2s",
802 .id = 0,
803 .playback = {
804 .channels_min = 2,
805 .channels_max = 2,
806 .rates = DAVINCI_MCASP_RATES,
807 .formats = SNDRV_PCM_FMTBIT_S8 |
808 SNDRV_PCM_FMTBIT_S16_LE |
809 SNDRV_PCM_FMTBIT_S32_LE,
810 },
811 .capture = {
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 .ops = &davinci_mcasp_dai_ops,
820
821 },
822 {
823 .name = "davinci-dit",
824 .id = 1,
825 .playback = {
826 .channels_min = 1,
827 .channels_max = 384,
828 .rates = DAVINCI_MCASP_RATES,
829 .formats = SNDRV_PCM_FMTBIT_S16_LE,
830 },
831 .ops = &davinci_mcasp_dai_ops,
832 },
833
834 };
835 EXPORT_SYMBOL_GPL(davinci_mcasp_dai);
836
837 static int davinci_mcasp_probe(struct platform_device *pdev)
838 {
839 struct davinci_pcm_dma_params *dma_data;
840 struct resource *mem, *ioarea, *res;
841 struct snd_platform_data *pdata;
842 struct davinci_audio_dev *dev;
843 int ret = 0;
844
845 dev = kzalloc(sizeof(struct davinci_audio_dev), GFP_KERNEL);
846 if (!dev)
847 return -ENOMEM;
848
849 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
850 if (!mem) {
851 dev_err(&pdev->dev, "no mem resource?\n");
852 ret = -ENODEV;
853 goto err_release_data;
854 }
855
856 ioarea = request_mem_region(mem->start,
857 (mem->end - mem->start) + 1, pdev->name);
858 if (!ioarea) {
859 dev_err(&pdev->dev, "Audio region already claimed\n");
860 ret = -EBUSY;
861 goto err_release_data;
862 }
863
864 pdata = pdev->dev.platform_data;
865 dev->clk = clk_get(&pdev->dev, NULL);
866 if (IS_ERR(dev->clk)) {
867 ret = -ENODEV;
868 goto err_release_region;
869 }
870
871 clk_enable(dev->clk);
872
873 dev->base = (void __iomem *)IO_ADDRESS(mem->start);
874 dev->op_mode = pdata->op_mode;
875 dev->tdm_slots = pdata->tdm_slots;
876 dev->num_serializer = pdata->num_serializer;
877 dev->serial_dir = pdata->serial_dir;
878 dev->codec_fmt = pdata->codec_fmt;
879 dev->version = pdata->version;
880 dev->txnumevt = pdata->txnumevt;
881 dev->rxnumevt = pdata->rxnumevt;
882
883 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
884 dma_data->eventq_no = pdata->eventq_no;
885 dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
886 io_v2p(dev->base));
887
888 /* first TX, then RX */
889 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
890 if (!res) {
891 dev_err(&pdev->dev, "no DMA resource\n");
892 goto err_release_region;
893 }
894
895 dma_data->channel = res->start;
896
897 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
898 dma_data->eventq_no = pdata->eventq_no;
899 dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
900 io_v2p(dev->base));
901
902 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
903 if (!res) {
904 dev_err(&pdev->dev, "no DMA resource\n");
905 goto err_release_region;
906 }
907
908 dma_data->channel = res->start;
909 davinci_mcasp_dai[pdata->op_mode].private_data = dev;
910 davinci_mcasp_dai[pdata->op_mode].dev = &pdev->dev;
911 ret = snd_soc_register_dai(&davinci_mcasp_dai[pdata->op_mode]);
912
913 if (ret != 0)
914 goto err_release_region;
915 return 0;
916
917 err_release_region:
918 release_mem_region(mem->start, (mem->end - mem->start) + 1);
919 err_release_data:
920 kfree(dev);
921
922 return ret;
923 }
924
925 static int davinci_mcasp_remove(struct platform_device *pdev)
926 {
927 struct snd_platform_data *pdata = pdev->dev.platform_data;
928 struct davinci_audio_dev *dev;
929 struct resource *mem;
930
931 snd_soc_unregister_dai(&davinci_mcasp_dai[pdata->op_mode]);
932 dev = davinci_mcasp_dai[pdata->op_mode].private_data;
933 clk_disable(dev->clk);
934 clk_put(dev->clk);
935 dev->clk = NULL;
936
937 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
938 release_mem_region(mem->start, (mem->end - mem->start) + 1);
939
940 kfree(dev);
941
942 return 0;
943 }
944
945 static struct platform_driver davinci_mcasp_driver = {
946 .probe = davinci_mcasp_probe,
947 .remove = davinci_mcasp_remove,
948 .driver = {
949 .name = "davinci-mcasp",
950 .owner = THIS_MODULE,
951 },
952 };
953
954 static int __init davinci_mcasp_init(void)
955 {
956 return platform_driver_register(&davinci_mcasp_driver);
957 }
958 module_init(davinci_mcasp_init);
959
960 static void __exit davinci_mcasp_exit(void)
961 {
962 platform_driver_unregister(&davinci_mcasp_driver);
963 }
964 module_exit(davinci_mcasp_exit);
965
966 MODULE_AUTHOR("Steve Chen");
967 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
968 MODULE_LICENSE("GPL");
969
Linux for Ginger Game Console