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Merge tag 'for-linus-4.3-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / sound / soc / davinci / davinci-mcasp.c
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 #include <linux/pm_runtime.h>
26 #include <linux/of.h>
27 #include <linux/of_platform.h>
28 #include <linux/of_device.h>
29 #include <linux/platform_data/davinci_asp.h>
30 #include <linux/math64.h>
31
32 #include <sound/asoundef.h>
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/initval.h>
37 #include <sound/soc.h>
38 #include <sound/dmaengine_pcm.h>
39 #include <sound/omap-pcm.h>
40
41 #include "edma-pcm.h"
42 #include "davinci-mcasp.h"
43
44 #define MCASP_MAX_AFIFO_DEPTH 64
45
46 static u32 context_regs[] = {
47 DAVINCI_MCASP_TXFMCTL_REG,
48 DAVINCI_MCASP_RXFMCTL_REG,
49 DAVINCI_MCASP_TXFMT_REG,
50 DAVINCI_MCASP_RXFMT_REG,
51 DAVINCI_MCASP_ACLKXCTL_REG,
52 DAVINCI_MCASP_ACLKRCTL_REG,
53 DAVINCI_MCASP_AHCLKXCTL_REG,
54 DAVINCI_MCASP_AHCLKRCTL_REG,
55 DAVINCI_MCASP_PDIR_REG,
56 DAVINCI_MCASP_RXMASK_REG,
57 DAVINCI_MCASP_TXMASK_REG,
58 DAVINCI_MCASP_RXTDM_REG,
59 DAVINCI_MCASP_TXTDM_REG,
60 };
61
62 struct davinci_mcasp_context {
63 u32 config_regs[ARRAY_SIZE(context_regs)];
64 u32 afifo_regs[2]; /* for read/write fifo control registers */
65 u32 *xrsr_regs; /* for serializer configuration */
66 bool pm_state;
67 };
68
69 struct davinci_mcasp_ruledata {
70 struct davinci_mcasp *mcasp;
71 int serializers;
72 };
73
74 struct davinci_mcasp {
75 struct snd_dmaengine_dai_dma_data dma_data[2];
76 void __iomem *base;
77 u32 fifo_base;
78 struct device *dev;
79 struct snd_pcm_substream *substreams[2];
80
81 /* McASP specific data */
82 int tdm_slots;
83 u8 op_mode;
84 u8 num_serializer;
85 u8 *serial_dir;
86 u8 version;
87 u8 bclk_div;
88 u16 bclk_lrclk_ratio;
89 int streams;
90 u32 irq_request[2];
91 int dma_request[2];
92
93 int sysclk_freq;
94 bool bclk_master;
95
96 /* McASP FIFO related */
97 u8 txnumevt;
98 u8 rxnumevt;
99
100 bool dat_port;
101
102 /* Used for comstraint setting on the second stream */
103 u32 channels;
104
105 #ifdef CONFIG_PM_SLEEP
106 struct davinci_mcasp_context context;
107 #endif
108
109 struct davinci_mcasp_ruledata ruledata[2];
110 struct snd_pcm_hw_constraint_list chconstr[2];
111 };
112
113 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
114 u32 val)
115 {
116 void __iomem *reg = mcasp->base + offset;
117 __raw_writel(__raw_readl(reg) | val, reg);
118 }
119
120 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
121 u32 val)
122 {
123 void __iomem *reg = mcasp->base + offset;
124 __raw_writel((__raw_readl(reg) & ~(val)), reg);
125 }
126
127 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
128 u32 val, u32 mask)
129 {
130 void __iomem *reg = mcasp->base + offset;
131 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
132 }
133
134 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
135 u32 val)
136 {
137 __raw_writel(val, mcasp->base + offset);
138 }
139
140 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
141 {
142 return (u32)__raw_readl(mcasp->base + offset);
143 }
144
145 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
146 {
147 int i = 0;
148
149 mcasp_set_bits(mcasp, ctl_reg, val);
150
151 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
152 /* loop count is to avoid the lock-up */
153 for (i = 0; i < 1000; i++) {
154 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
155 break;
156 }
157
158 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
159 printk(KERN_ERR "GBLCTL write error\n");
160 }
161
162 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
163 {
164 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
165 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
166
167 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
168 }
169
170 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
171 {
172 if (mcasp->rxnumevt) { /* enable FIFO */
173 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
174
175 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
176 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
177 }
178
179 /* Start clocks */
180 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
181 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
182 /*
183 * When ASYNC == 0 the transmit and receive sections operate
184 * synchronously from the transmit clock and frame sync. We need to make
185 * sure that the TX signlas are enabled when starting reception.
186 */
187 if (mcasp_is_synchronous(mcasp)) {
188 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
189 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
190 }
191
192 /* Activate serializer(s) */
193 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
194 /* Release RX state machine */
195 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
196 /* Release Frame Sync generator */
197 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
198 if (mcasp_is_synchronous(mcasp))
199 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
200
201 /* enable receive IRQs */
202 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
203 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
204 }
205
206 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
207 {
208 u32 cnt;
209
210 if (mcasp->txnumevt) { /* enable FIFO */
211 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
212
213 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
214 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
215 }
216
217 /* Start clocks */
218 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
219 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
220 /* Activate serializer(s) */
221 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
222
223 /* wait for XDATA to be cleared */
224 cnt = 0;
225 while (!(mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) &
226 ~XRDATA) && (cnt < 100000))
227 cnt++;
228
229 /* Release TX state machine */
230 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
231 /* Release Frame Sync generator */
232 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
233
234 /* enable transmit IRQs */
235 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
236 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
237 }
238
239 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
240 {
241 mcasp->streams++;
242
243 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
244 mcasp_start_tx(mcasp);
245 else
246 mcasp_start_rx(mcasp);
247 }
248
249 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
250 {
251 /* disable IRQ sources */
252 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
253 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
254
255 /*
256 * In synchronous mode stop the TX clocks if no other stream is
257 * running
258 */
259 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
260 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
261
262 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
263 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
264
265 if (mcasp->rxnumevt) { /* disable FIFO */
266 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
267
268 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
269 }
270 }
271
272 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
273 {
274 u32 val = 0;
275
276 /* disable IRQ sources */
277 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
278 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
279
280 /*
281 * In synchronous mode keep TX clocks running if the capture stream is
282 * still running.
283 */
284 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
285 val = TXHCLKRST | TXCLKRST | TXFSRST;
286
287 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
288 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
289
290 if (mcasp->txnumevt) { /* disable FIFO */
291 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
292
293 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
294 }
295 }
296
297 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
298 {
299 mcasp->streams--;
300
301 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
302 mcasp_stop_tx(mcasp);
303 else
304 mcasp_stop_rx(mcasp);
305 }
306
307 static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data)
308 {
309 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
310 struct snd_pcm_substream *substream;
311 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK];
312 u32 handled_mask = 0;
313 u32 stat;
314
315 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG);
316 if (stat & XUNDRN & irq_mask) {
317 dev_warn(mcasp->dev, "Transmit buffer underflow\n");
318 handled_mask |= XUNDRN;
319
320 substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK];
321 if (substream) {
322 snd_pcm_stream_lock_irq(substream);
323 if (snd_pcm_running(substream))
324 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
325 snd_pcm_stream_unlock_irq(substream);
326 }
327 }
328
329 if (!handled_mask)
330 dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n",
331 stat);
332
333 if (stat & XRERR)
334 handled_mask |= XRERR;
335
336 /* Ack the handled event only */
337 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask);
338
339 return IRQ_RETVAL(handled_mask);
340 }
341
342 static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data)
343 {
344 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
345 struct snd_pcm_substream *substream;
346 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE];
347 u32 handled_mask = 0;
348 u32 stat;
349
350 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG);
351 if (stat & ROVRN & irq_mask) {
352 dev_warn(mcasp->dev, "Receive buffer overflow\n");
353 handled_mask |= ROVRN;
354
355 substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE];
356 if (substream) {
357 snd_pcm_stream_lock_irq(substream);
358 if (snd_pcm_running(substream))
359 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
360 snd_pcm_stream_unlock_irq(substream);
361 }
362 }
363
364 if (!handled_mask)
365 dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n",
366 stat);
367
368 if (stat & XRERR)
369 handled_mask |= XRERR;
370
371 /* Ack the handled event only */
372 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask);
373
374 return IRQ_RETVAL(handled_mask);
375 }
376
377 static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data)
378 {
379 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
380 irqreturn_t ret = IRQ_NONE;
381
382 if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK])
383 ret = davinci_mcasp_tx_irq_handler(irq, data);
384
385 if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE])
386 ret |= davinci_mcasp_rx_irq_handler(irq, data);
387
388 return ret;
389 }
390
391 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
392 unsigned int fmt)
393 {
394 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
395 int ret = 0;
396 u32 data_delay;
397 bool fs_pol_rising;
398 bool inv_fs = false;
399
400 pm_runtime_get_sync(mcasp->dev);
401 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
402 case SND_SOC_DAIFMT_DSP_A:
403 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
404 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
405 /* 1st data bit occur one ACLK cycle after the frame sync */
406 data_delay = 1;
407 break;
408 case SND_SOC_DAIFMT_DSP_B:
409 case SND_SOC_DAIFMT_AC97:
410 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
411 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
412 /* No delay after FS */
413 data_delay = 0;
414 break;
415 case SND_SOC_DAIFMT_I2S:
416 /* configure a full-word SYNC pulse (LRCLK) */
417 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
418 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
419 /* 1st data bit occur one ACLK cycle after the frame sync */
420 data_delay = 1;
421 /* FS need to be inverted */
422 inv_fs = true;
423 break;
424 case SND_SOC_DAIFMT_LEFT_J:
425 /* configure a full-word SYNC pulse (LRCLK) */
426 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
427 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
428 /* No delay after FS */
429 data_delay = 0;
430 break;
431 default:
432 ret = -EINVAL;
433 goto out;
434 }
435
436 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
437 FSXDLY(3));
438 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
439 FSRDLY(3));
440
441 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
442 case SND_SOC_DAIFMT_CBS_CFS:
443 /* codec is clock and frame slave */
444 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
445 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
446
447 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
448 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
449
450 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
451 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
452 mcasp->bclk_master = 1;
453 break;
454 case SND_SOC_DAIFMT_CBS_CFM:
455 /* codec is clock slave and frame master */
456 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
457 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
458
459 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
460 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
461
462 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
463 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
464 mcasp->bclk_master = 1;
465 break;
466 case SND_SOC_DAIFMT_CBM_CFS:
467 /* codec is clock master and frame slave */
468 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
469 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
470
471 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
472 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
473
474 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
475 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
476 mcasp->bclk_master = 0;
477 break;
478 case SND_SOC_DAIFMT_CBM_CFM:
479 /* codec is clock and frame master */
480 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
481 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
482
483 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
484 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
485
486 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG,
487 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
488 mcasp->bclk_master = 0;
489 break;
490 default:
491 ret = -EINVAL;
492 goto out;
493 }
494
495 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
496 case SND_SOC_DAIFMT_IB_NF:
497 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
498 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
499 fs_pol_rising = true;
500 break;
501 case SND_SOC_DAIFMT_NB_IF:
502 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
503 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
504 fs_pol_rising = false;
505 break;
506 case SND_SOC_DAIFMT_IB_IF:
507 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
508 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
509 fs_pol_rising = false;
510 break;
511 case SND_SOC_DAIFMT_NB_NF:
512 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
513 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
514 fs_pol_rising = true;
515 break;
516 default:
517 ret = -EINVAL;
518 goto out;
519 }
520
521 if (inv_fs)
522 fs_pol_rising = !fs_pol_rising;
523
524 if (fs_pol_rising) {
525 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
526 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
527 } else {
528 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
529 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
530 }
531 out:
532 pm_runtime_put(mcasp->dev);
533 return ret;
534 }
535
536 static int __davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
537 int div, bool explicit)
538 {
539 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
540
541 pm_runtime_get_sync(mcasp->dev);
542 switch (div_id) {
543 case 0: /* MCLK divider */
544 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
545 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
546 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
547 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
548 break;
549
550 case 1: /* BCLK divider */
551 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
552 ACLKXDIV(div - 1), ACLKXDIV_MASK);
553 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
554 ACLKRDIV(div - 1), ACLKRDIV_MASK);
555 if (explicit)
556 mcasp->bclk_div = div;
557 break;
558
559 case 2: /* BCLK/LRCLK ratio */
560 mcasp->bclk_lrclk_ratio = div;
561 break;
562
563 default:
564 return -EINVAL;
565 }
566
567 pm_runtime_put(mcasp->dev);
568 return 0;
569 }
570
571 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
572 int div)
573 {
574 return __davinci_mcasp_set_clkdiv(dai, div_id, div, 1);
575 }
576
577 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
578 unsigned int freq, int dir)
579 {
580 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
581
582 pm_runtime_get_sync(mcasp->dev);
583 if (dir == SND_SOC_CLOCK_OUT) {
584 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
585 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
586 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
587 } else {
588 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
589 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
590 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
591 }
592
593 mcasp->sysclk_freq = freq;
594
595 pm_runtime_put(mcasp->dev);
596 return 0;
597 }
598
599 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
600 int word_length)
601 {
602 u32 fmt;
603 u32 tx_rotate = (word_length / 4) & 0x7;
604 u32 mask = (1ULL << word_length) - 1;
605 /*
606 * For captured data we should not rotate, inversion and masking is
607 * enoguh to get the data to the right position:
608 * Format data from bus after reverse (XRBUF)
609 * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB|
610 * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
611 * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
612 * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB|
613 */
614 u32 rx_rotate = 0;
615
616 /*
617 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
618 * callback, take it into account here. That allows us to for example
619 * send 32 bits per channel to the codec, while only 16 of them carry
620 * audio payload.
621 * The clock ratio is given for a full period of data (for I2S format
622 * both left and right channels), so it has to be divided by number of
623 * tdm-slots (for I2S - divided by 2).
624 */
625 if (mcasp->bclk_lrclk_ratio) {
626 u32 slot_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
627
628 /*
629 * When we have more bclk then it is needed for the data, we
630 * need to use the rotation to move the received samples to have
631 * correct alignment.
632 */
633 rx_rotate = (slot_length - word_length) / 4;
634 word_length = slot_length;
635 }
636
637 /* mapping of the XSSZ bit-field as described in the datasheet */
638 fmt = (word_length >> 1) - 1;
639
640 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
641 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
642 RXSSZ(0x0F));
643 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
644 TXSSZ(0x0F));
645 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
646 TXROT(7));
647 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
648 RXROT(7));
649 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
650 }
651
652 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
653
654 return 0;
655 }
656
657 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
658 int period_words, int channels)
659 {
660 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
661 int i;
662 u8 tx_ser = 0;
663 u8 rx_ser = 0;
664 u8 slots = mcasp->tdm_slots;
665 u8 max_active_serializers = (channels + slots - 1) / slots;
666 int active_serializers, numevt, n;
667 u32 reg;
668 /* Default configuration */
669 if (mcasp->version < MCASP_VERSION_3)
670 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
671
672 /* All PINS as McASP */
673 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
674
675 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
676 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
677 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
678 } else {
679 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
680 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
681 }
682
683 for (i = 0; i < mcasp->num_serializer; i++) {
684 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
685 mcasp->serial_dir[i]);
686 if (mcasp->serial_dir[i] == TX_MODE &&
687 tx_ser < max_active_serializers) {
688 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
689 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
690 DISMOD_LOW, DISMOD_MASK);
691 tx_ser++;
692 } else if (mcasp->serial_dir[i] == RX_MODE &&
693 rx_ser < max_active_serializers) {
694 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
695 rx_ser++;
696 } else {
697 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
698 SRMOD_INACTIVE, SRMOD_MASK);
699 }
700 }
701
702 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
703 active_serializers = tx_ser;
704 numevt = mcasp->txnumevt;
705 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
706 } else {
707 active_serializers = rx_ser;
708 numevt = mcasp->rxnumevt;
709 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
710 }
711
712 if (active_serializers < max_active_serializers) {
713 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
714 "enabled in mcasp (%d)\n", channels,
715 active_serializers * slots);
716 return -EINVAL;
717 }
718
719 /* AFIFO is not in use */
720 if (!numevt) {
721 /* Configure the burst size for platform drivers */
722 if (active_serializers > 1) {
723 /*
724 * If more than one serializers are in use we have one
725 * DMA request to provide data for all serializers.
726 * For example if three serializers are enabled the DMA
727 * need to transfer three words per DMA request.
728 */
729 dma_data->maxburst = active_serializers;
730 } else {
731 dma_data->maxburst = 0;
732 }
733 return 0;
734 }
735
736 if (period_words % active_serializers) {
737 dev_err(mcasp->dev, "Invalid combination of period words and "
738 "active serializers: %d, %d\n", period_words,
739 active_serializers);
740 return -EINVAL;
741 }
742
743 /*
744 * Calculate the optimal AFIFO depth for platform side:
745 * The number of words for numevt need to be in steps of active
746 * serializers.
747 */
748 n = numevt % active_serializers;
749 if (n)
750 numevt += (active_serializers - n);
751 while (period_words % numevt && numevt > 0)
752 numevt -= active_serializers;
753 if (numevt <= 0)
754 numevt = active_serializers;
755
756 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
757 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
758
759 /* Configure the burst size for platform drivers */
760 if (numevt == 1)
761 numevt = 0;
762 dma_data->maxburst = numevt;
763
764 return 0;
765 }
766
767 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,
768 int channels)
769 {
770 int i, active_slots;
771 int total_slots;
772 int active_serializers;
773 u32 mask = 0;
774 u32 busel = 0;
775
776 total_slots = mcasp->tdm_slots;
777
778 /*
779 * If more than one serializer is needed, then use them with
780 * their specified tdm_slots count. Otherwise, one serializer
781 * can cope with the transaction using as many slots as channels
782 * in the stream, requires channels symmetry
783 */
784 active_serializers = (channels + total_slots - 1) / total_slots;
785 if (active_serializers == 1)
786 active_slots = channels;
787 else
788 active_slots = total_slots;
789
790 for (i = 0; i < active_slots; i++)
791 mask |= (1 << i);
792
793 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
794
795 if (!mcasp->dat_port)
796 busel = TXSEL;
797
798 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
799 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
800 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
801 FSXMOD(total_slots), FSXMOD(0x1FF));
802
803 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
804 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
805 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
806 FSRMOD(total_slots), FSRMOD(0x1FF));
807
808 return 0;
809 }
810
811 /* S/PDIF */
812 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
813 unsigned int rate)
814 {
815 u32 cs_value = 0;
816 u8 *cs_bytes = (u8*) &cs_value;
817
818 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
819 and LSB first */
820 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
821
822 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
823 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
824
825 /* Set the TX tdm : for all the slots */
826 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
827
828 /* Set the TX clock controls : div = 1 and internal */
829 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
830
831 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
832
833 /* Only 44100 and 48000 are valid, both have the same setting */
834 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
835
836 /* Enable the DIT */
837 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
838
839 /* Set S/PDIF channel status bits */
840 cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
841 cs_bytes[1] = IEC958_AES1_CON_PCM_CODER;
842
843 switch (rate) {
844 case 22050:
845 cs_bytes[3] |= IEC958_AES3_CON_FS_22050;
846 break;
847 case 24000:
848 cs_bytes[3] |= IEC958_AES3_CON_FS_24000;
849 break;
850 case 32000:
851 cs_bytes[3] |= IEC958_AES3_CON_FS_32000;
852 break;
853 case 44100:
854 cs_bytes[3] |= IEC958_AES3_CON_FS_44100;
855 break;
856 case 48000:
857 cs_bytes[3] |= IEC958_AES3_CON_FS_48000;
858 break;
859 case 88200:
860 cs_bytes[3] |= IEC958_AES3_CON_FS_88200;
861 break;
862 case 96000:
863 cs_bytes[3] |= IEC958_AES3_CON_FS_96000;
864 break;
865 case 176400:
866 cs_bytes[3] |= IEC958_AES3_CON_FS_176400;
867 break;
868 case 192000:
869 cs_bytes[3] |= IEC958_AES3_CON_FS_192000;
870 break;
871 default:
872 printk(KERN_WARNING "unsupported sampling rate: %d\n", rate);
873 return -EINVAL;
874 }
875
876 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value);
877 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value);
878
879 return 0;
880 }
881
882 static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp,
883 unsigned int bclk_freq,
884 int *error_ppm)
885 {
886 int div = mcasp->sysclk_freq / bclk_freq;
887 int rem = mcasp->sysclk_freq % bclk_freq;
888
889 if (rem != 0) {
890 if (div == 0 ||
891 ((mcasp->sysclk_freq / div) - bclk_freq) >
892 (bclk_freq - (mcasp->sysclk_freq / (div+1)))) {
893 div++;
894 rem = rem - bclk_freq;
895 }
896 }
897 if (error_ppm)
898 *error_ppm =
899 (div*1000000 + (int)div64_long(1000000LL*rem,
900 (int)bclk_freq))
901 /div - 1000000;
902
903 return div;
904 }
905
906 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
907 struct snd_pcm_hw_params *params,
908 struct snd_soc_dai *cpu_dai)
909 {
910 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
911 int word_length;
912 int channels = params_channels(params);
913 int period_size = params_period_size(params);
914 int ret;
915
916 /*
917 * If mcasp is BCLK master, and a BCLK divider was not provided by
918 * the machine driver, we need to calculate the ratio.
919 */
920 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
921 int slots = mcasp->tdm_slots;
922 int rate = params_rate(params);
923 int sbits = params_width(params);
924 int ppm, div;
925
926 div = davinci_mcasp_calc_clk_div(mcasp, rate*sbits*slots,
927 &ppm);
928 if (ppm)
929 dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n",
930 ppm);
931
932 __davinci_mcasp_set_clkdiv(cpu_dai, 1, div, 0);
933 }
934
935 ret = mcasp_common_hw_param(mcasp, substream->stream,
936 period_size * channels, channels);
937 if (ret)
938 return ret;
939
940 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
941 ret = mcasp_dit_hw_param(mcasp, params_rate(params));
942 else
943 ret = mcasp_i2s_hw_param(mcasp, substream->stream,
944 channels);
945
946 if (ret)
947 return ret;
948
949 switch (params_format(params)) {
950 case SNDRV_PCM_FORMAT_U8:
951 case SNDRV_PCM_FORMAT_S8:
952 word_length = 8;
953 break;
954
955 case SNDRV_PCM_FORMAT_U16_LE:
956 case SNDRV_PCM_FORMAT_S16_LE:
957 word_length = 16;
958 break;
959
960 case SNDRV_PCM_FORMAT_U24_3LE:
961 case SNDRV_PCM_FORMAT_S24_3LE:
962 word_length = 24;
963 break;
964
965 case SNDRV_PCM_FORMAT_U24_LE:
966 case SNDRV_PCM_FORMAT_S24_LE:
967 word_length = 24;
968 break;
969
970 case SNDRV_PCM_FORMAT_U32_LE:
971 case SNDRV_PCM_FORMAT_S32_LE:
972 word_length = 32;
973 break;
974
975 default:
976 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
977 return -EINVAL;
978 }
979
980 davinci_config_channel_size(mcasp, word_length);
981
982 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE)
983 mcasp->channels = channels;
984
985 return 0;
986 }
987
988 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
989 int cmd, struct snd_soc_dai *cpu_dai)
990 {
991 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
992 int ret = 0;
993
994 switch (cmd) {
995 case SNDRV_PCM_TRIGGER_RESUME:
996 case SNDRV_PCM_TRIGGER_START:
997 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
998 davinci_mcasp_start(mcasp, substream->stream);
999 break;
1000 case SNDRV_PCM_TRIGGER_SUSPEND:
1001 case SNDRV_PCM_TRIGGER_STOP:
1002 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1003 davinci_mcasp_stop(mcasp, substream->stream);
1004 break;
1005
1006 default:
1007 ret = -EINVAL;
1008 }
1009
1010 return ret;
1011 }
1012
1013 static const unsigned int davinci_mcasp_dai_rates[] = {
1014 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
1015 88200, 96000, 176400, 192000,
1016 };
1017
1018 #define DAVINCI_MAX_RATE_ERROR_PPM 1000
1019
1020 static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
1021 struct snd_pcm_hw_rule *rule)
1022 {
1023 struct davinci_mcasp_ruledata *rd = rule->private;
1024 struct snd_interval *ri =
1025 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1026 int sbits = params_width(params);
1027 int slots = rd->mcasp->tdm_slots;
1028 struct snd_interval range;
1029 int i;
1030
1031 snd_interval_any(&range);
1032 range.empty = 1;
1033
1034 for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) {
1035 if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) {
1036 uint bclk_freq = sbits*slots*
1037 davinci_mcasp_dai_rates[i];
1038 int ppm;
1039
1040 davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, &ppm);
1041 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1042 if (range.empty) {
1043 range.min = davinci_mcasp_dai_rates[i];
1044 range.empty = 0;
1045 }
1046 range.max = davinci_mcasp_dai_rates[i];
1047 }
1048 }
1049 }
1050
1051 dev_dbg(rd->mcasp->dev,
1052 "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n",
1053 ri->min, ri->max, range.min, range.max, sbits, slots);
1054
1055 return snd_interval_refine(hw_param_interval(params, rule->var),
1056 &range);
1057 }
1058
1059 static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
1060 struct snd_pcm_hw_rule *rule)
1061 {
1062 struct davinci_mcasp_ruledata *rd = rule->private;
1063 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1064 struct snd_mask nfmt;
1065 int rate = params_rate(params);
1066 int slots = rd->mcasp->tdm_slots;
1067 int i, count = 0;
1068
1069 snd_mask_none(&nfmt);
1070
1071 for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
1072 if (snd_mask_test(fmt, i)) {
1073 uint bclk_freq = snd_pcm_format_width(i)*slots*rate;
1074 int ppm;
1075
1076 davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, &ppm);
1077 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1078 snd_mask_set(&nfmt, i);
1079 count++;
1080 }
1081 }
1082 }
1083 dev_dbg(rd->mcasp->dev,
1084 "%d possible sample format for %d Hz and %d tdm slots\n",
1085 count, rate, slots);
1086
1087 return snd_mask_refine(fmt, &nfmt);
1088 }
1089
1090 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
1091 struct snd_soc_dai *cpu_dai)
1092 {
1093 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1094 struct davinci_mcasp_ruledata *ruledata =
1095 &mcasp->ruledata[substream->stream];
1096 u32 max_channels = 0;
1097 int i, dir;
1098
1099 mcasp->substreams[substream->stream] = substream;
1100
1101 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1102 return 0;
1103
1104 /*
1105 * Limit the maximum allowed channels for the first stream:
1106 * number of serializers for the direction * tdm slots per serializer
1107 */
1108 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1109 dir = TX_MODE;
1110 else
1111 dir = RX_MODE;
1112
1113 for (i = 0; i < mcasp->num_serializer; i++) {
1114 if (mcasp->serial_dir[i] == dir)
1115 max_channels++;
1116 }
1117 ruledata->serializers = max_channels;
1118 max_channels *= mcasp->tdm_slots;
1119 /*
1120 * If the already active stream has less channels than the calculated
1121 * limnit based on the seirializers * tdm_slots, we need to use that as
1122 * a constraint for the second stream.
1123 * Otherwise (first stream or less allowed channels) we use the
1124 * calculated constraint.
1125 */
1126 if (mcasp->channels && mcasp->channels < max_channels)
1127 max_channels = mcasp->channels;
1128
1129 snd_pcm_hw_constraint_minmax(substream->runtime,
1130 SNDRV_PCM_HW_PARAM_CHANNELS,
1131 2, max_channels);
1132
1133 if (mcasp->chconstr[substream->stream].count)
1134 snd_pcm_hw_constraint_list(substream->runtime,
1135 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1136 &mcasp->chconstr[substream->stream]);
1137
1138 /*
1139 * If we rely on implicit BCLK divider setting we should
1140 * set constraints based on what we can provide.
1141 */
1142 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1143 int ret;
1144
1145 ruledata->mcasp = mcasp;
1146
1147 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1148 SNDRV_PCM_HW_PARAM_RATE,
1149 davinci_mcasp_hw_rule_rate,
1150 ruledata,
1151 SNDRV_PCM_HW_PARAM_FORMAT, -1);
1152 if (ret)
1153 return ret;
1154 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1155 SNDRV_PCM_HW_PARAM_FORMAT,
1156 davinci_mcasp_hw_rule_format,
1157 ruledata,
1158 SNDRV_PCM_HW_PARAM_RATE, -1);
1159 if (ret)
1160 return ret;
1161 }
1162
1163 return 0;
1164 }
1165
1166 static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream,
1167 struct snd_soc_dai *cpu_dai)
1168 {
1169 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1170
1171 mcasp->substreams[substream->stream] = NULL;
1172
1173 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1174 return;
1175
1176 if (!cpu_dai->active)
1177 mcasp->channels = 0;
1178 }
1179
1180 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
1181 .startup = davinci_mcasp_startup,
1182 .shutdown = davinci_mcasp_shutdown,
1183 .trigger = davinci_mcasp_trigger,
1184 .hw_params = davinci_mcasp_hw_params,
1185 .set_fmt = davinci_mcasp_set_dai_fmt,
1186 .set_clkdiv = davinci_mcasp_set_clkdiv,
1187 .set_sysclk = davinci_mcasp_set_sysclk,
1188 };
1189
1190 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
1191 {
1192 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1193
1194 dai->playback_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1195 dai->capture_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1196
1197 return 0;
1198 }
1199
1200 #ifdef CONFIG_PM_SLEEP
1201 static int davinci_mcasp_suspend(struct snd_soc_dai *dai)
1202 {
1203 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1204 struct davinci_mcasp_context *context = &mcasp->context;
1205 u32 reg;
1206 int i;
1207
1208 context->pm_state = pm_runtime_active(mcasp->dev);
1209 if (!context->pm_state)
1210 pm_runtime_get_sync(mcasp->dev);
1211
1212 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
1213 context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);
1214
1215 if (mcasp->txnumevt) {
1216 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
1217 context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);
1218 }
1219 if (mcasp->rxnumevt) {
1220 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
1221 context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);
1222 }
1223
1224 for (i = 0; i < mcasp->num_serializer; i++)
1225 context->xrsr_regs[i] = mcasp_get_reg(mcasp,
1226 DAVINCI_MCASP_XRSRCTL_REG(i));
1227
1228 pm_runtime_put_sync(mcasp->dev);
1229
1230 return 0;
1231 }
1232
1233 static int davinci_mcasp_resume(struct snd_soc_dai *dai)
1234 {
1235 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1236 struct davinci_mcasp_context *context = &mcasp->context;
1237 u32 reg;
1238 int i;
1239
1240 pm_runtime_get_sync(mcasp->dev);
1241
1242 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
1243 mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);
1244
1245 if (mcasp->txnumevt) {
1246 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
1247 mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);
1248 }
1249 if (mcasp->rxnumevt) {
1250 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
1251 mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);
1252 }
1253
1254 for (i = 0; i < mcasp->num_serializer; i++)
1255 mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
1256 context->xrsr_regs[i]);
1257
1258 if (!context->pm_state)
1259 pm_runtime_put_sync(mcasp->dev);
1260
1261 return 0;
1262 }
1263 #else
1264 #define davinci_mcasp_suspend NULL
1265 #define davinci_mcasp_resume NULL
1266 #endif
1267
1268 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
1269
1270 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1271 SNDRV_PCM_FMTBIT_U8 | \
1272 SNDRV_PCM_FMTBIT_S16_LE | \
1273 SNDRV_PCM_FMTBIT_U16_LE | \
1274 SNDRV_PCM_FMTBIT_S24_LE | \
1275 SNDRV_PCM_FMTBIT_U24_LE | \
1276 SNDRV_PCM_FMTBIT_S24_3LE | \
1277 SNDRV_PCM_FMTBIT_U24_3LE | \
1278 SNDRV_PCM_FMTBIT_S32_LE | \
1279 SNDRV_PCM_FMTBIT_U32_LE)
1280
1281 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
1282 {
1283 .name = "davinci-mcasp.0",
1284 .probe = davinci_mcasp_dai_probe,
1285 .suspend = davinci_mcasp_suspend,
1286 .resume = davinci_mcasp_resume,
1287 .playback = {
1288 .channels_min = 2,
1289 .channels_max = 32 * 16,
1290 .rates = DAVINCI_MCASP_RATES,
1291 .formats = DAVINCI_MCASP_PCM_FMTS,
1292 },
1293 .capture = {
1294 .channels_min = 2,
1295 .channels_max = 32 * 16,
1296 .rates = DAVINCI_MCASP_RATES,
1297 .formats = DAVINCI_MCASP_PCM_FMTS,
1298 },
1299 .ops = &davinci_mcasp_dai_ops,
1300
1301 .symmetric_samplebits = 1,
1302 },
1303 {
1304 .name = "davinci-mcasp.1",
1305 .probe = davinci_mcasp_dai_probe,
1306 .playback = {
1307 .channels_min = 1,
1308 .channels_max = 384,
1309 .rates = DAVINCI_MCASP_RATES,
1310 .formats = DAVINCI_MCASP_PCM_FMTS,
1311 },
1312 .ops = &davinci_mcasp_dai_ops,
1313 },
1314
1315 };
1316
1317 static const struct snd_soc_component_driver davinci_mcasp_component = {
1318 .name = "davinci-mcasp",
1319 };
1320
1321 /* Some HW specific values and defaults. The rest is filled in from DT. */
1322 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
1323 .tx_dma_offset = 0x400,
1324 .rx_dma_offset = 0x400,
1325 .version = MCASP_VERSION_1,
1326 };
1327
1328 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
1329 .tx_dma_offset = 0x2000,
1330 .rx_dma_offset = 0x2000,
1331 .version = MCASP_VERSION_2,
1332 };
1333
1334 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
1335 .tx_dma_offset = 0,
1336 .rx_dma_offset = 0,
1337 .version = MCASP_VERSION_3,
1338 };
1339
1340 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
1341 .tx_dma_offset = 0x200,
1342 .rx_dma_offset = 0x284,
1343 .version = MCASP_VERSION_4,
1344 };
1345
1346 static const struct of_device_id mcasp_dt_ids[] = {
1347 {
1348 .compatible = "ti,dm646x-mcasp-audio",
1349 .data = &dm646x_mcasp_pdata,
1350 },
1351 {
1352 .compatible = "ti,da830-mcasp-audio",
1353 .data = &da830_mcasp_pdata,
1354 },
1355 {
1356 .compatible = "ti,am33xx-mcasp-audio",
1357 .data = &am33xx_mcasp_pdata,
1358 },
1359 {
1360 .compatible = "ti,dra7-mcasp-audio",
1361 .data = &dra7_mcasp_pdata,
1362 },
1363 { /* sentinel */ }
1364 };
1365 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1366
1367 static int mcasp_reparent_fck(struct platform_device *pdev)
1368 {
1369 struct device_node *node = pdev->dev.of_node;
1370 struct clk *gfclk, *parent_clk;
1371 const char *parent_name;
1372 int ret;
1373
1374 if (!node)
1375 return 0;
1376
1377 parent_name = of_get_property(node, "fck_parent", NULL);
1378 if (!parent_name)
1379 return 0;
1380
1381 gfclk = clk_get(&pdev->dev, "fck");
1382 if (IS_ERR(gfclk)) {
1383 dev_err(&pdev->dev, "failed to get fck\n");
1384 return PTR_ERR(gfclk);
1385 }
1386
1387 parent_clk = clk_get(NULL, parent_name);
1388 if (IS_ERR(parent_clk)) {
1389 dev_err(&pdev->dev, "failed to get parent clock\n");
1390 ret = PTR_ERR(parent_clk);
1391 goto err1;
1392 }
1393
1394 ret = clk_set_parent(gfclk, parent_clk);
1395 if (ret) {
1396 dev_err(&pdev->dev, "failed to reparent fck\n");
1397 goto err2;
1398 }
1399
1400 err2:
1401 clk_put(parent_clk);
1402 err1:
1403 clk_put(gfclk);
1404 return ret;
1405 }
1406
1407 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
1408 struct platform_device *pdev)
1409 {
1410 struct device_node *np = pdev->dev.of_node;
1411 struct davinci_mcasp_pdata *pdata = NULL;
1412 const struct of_device_id *match =
1413 of_match_device(mcasp_dt_ids, &pdev->dev);
1414 struct of_phandle_args dma_spec;
1415
1416 const u32 *of_serial_dir32;
1417 u32 val;
1418 int i, ret = 0;
1419
1420 if (pdev->dev.platform_data) {
1421 pdata = pdev->dev.platform_data;
1422 return pdata;
1423 } else if (match) {
1424 pdata = (struct davinci_mcasp_pdata*) match->data;
1425 } else {
1426 /* control shouldn't reach here. something is wrong */
1427 ret = -EINVAL;
1428 goto nodata;
1429 }
1430
1431 ret = of_property_read_u32(np, "op-mode", &val);
1432 if (ret >= 0)
1433 pdata->op_mode = val;
1434
1435 ret = of_property_read_u32(np, "tdm-slots", &val);
1436 if (ret >= 0) {
1437 if (val < 2 || val > 32) {
1438 dev_err(&pdev->dev,
1439 "tdm-slots must be in rage [2-32]\n");
1440 ret = -EINVAL;
1441 goto nodata;
1442 }
1443
1444 pdata->tdm_slots = val;
1445 }
1446
1447 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1448 val /= sizeof(u32);
1449 if (of_serial_dir32) {
1450 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1451 (sizeof(*of_serial_dir) * val),
1452 GFP_KERNEL);
1453 if (!of_serial_dir) {
1454 ret = -ENOMEM;
1455 goto nodata;
1456 }
1457
1458 for (i = 0; i < val; i++)
1459 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1460
1461 pdata->num_serializer = val;
1462 pdata->serial_dir = of_serial_dir;
1463 }
1464
1465 ret = of_property_match_string(np, "dma-names", "tx");
1466 if (ret < 0)
1467 goto nodata;
1468
1469 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1470 &dma_spec);
1471 if (ret < 0)
1472 goto nodata;
1473
1474 pdata->tx_dma_channel = dma_spec.args[0];
1475
1476 /* RX is not valid in DIT mode */
1477 if (pdata->op_mode != DAVINCI_MCASP_DIT_MODE) {
1478 ret = of_property_match_string(np, "dma-names", "rx");
1479 if (ret < 0)
1480 goto nodata;
1481
1482 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1483 &dma_spec);
1484 if (ret < 0)
1485 goto nodata;
1486
1487 pdata->rx_dma_channel = dma_spec.args[0];
1488 }
1489
1490 ret = of_property_read_u32(np, "tx-num-evt", &val);
1491 if (ret >= 0)
1492 pdata->txnumevt = val;
1493
1494 ret = of_property_read_u32(np, "rx-num-evt", &val);
1495 if (ret >= 0)
1496 pdata->rxnumevt = val;
1497
1498 ret = of_property_read_u32(np, "sram-size-playback", &val);
1499 if (ret >= 0)
1500 pdata->sram_size_playback = val;
1501
1502 ret = of_property_read_u32(np, "sram-size-capture", &val);
1503 if (ret >= 0)
1504 pdata->sram_size_capture = val;
1505
1506 return pdata;
1507
1508 nodata:
1509 if (ret < 0) {
1510 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1511 ret);
1512 pdata = NULL;
1513 }
1514 return pdata;
1515 }
1516
1517 /* All serializers must have equal number of channels */
1518 static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp,
1519 struct snd_pcm_hw_constraint_list *cl,
1520 int serializers)
1521 {
1522 unsigned int *list;
1523 int i, count = 0;
1524
1525 if (serializers <= 1)
1526 return 0;
1527
1528 list = devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
1529 (mcasp->tdm_slots + serializers - 2),
1530 GFP_KERNEL);
1531 if (!list)
1532 return -ENOMEM;
1533
1534 for (i = 2; i <= mcasp->tdm_slots; i++)
1535 list[count++] = i;
1536
1537 for (i = 2; i <= serializers; i++)
1538 list[count++] = i*mcasp->tdm_slots;
1539
1540 cl->count = count;
1541 cl->list = list;
1542
1543 return 0;
1544 }
1545
1546
1547 static int davinci_mcasp_init_ch_constraints(struct davinci_mcasp *mcasp)
1548 {
1549 int rx_serializers = 0, tx_serializers = 0, ret, i;
1550
1551 for (i = 0; i < mcasp->num_serializer; i++)
1552 if (mcasp->serial_dir[i] == TX_MODE)
1553 tx_serializers++;
1554 else if (mcasp->serial_dir[i] == RX_MODE)
1555 rx_serializers++;
1556
1557 ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[
1558 SNDRV_PCM_STREAM_PLAYBACK],
1559 tx_serializers);
1560 if (ret)
1561 return ret;
1562
1563 ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[
1564 SNDRV_PCM_STREAM_CAPTURE],
1565 rx_serializers);
1566
1567 return ret;
1568 }
1569
1570 enum {
1571 PCM_EDMA,
1572 PCM_SDMA,
1573 };
1574 static const char *sdma_prefix = "ti,omap";
1575
1576 static int davinci_mcasp_get_dma_type(struct davinci_mcasp *mcasp)
1577 {
1578 struct dma_chan *chan;
1579 const char *tmp;
1580 int ret = PCM_EDMA;
1581
1582 if (!mcasp->dev->of_node)
1583 return PCM_EDMA;
1584
1585 tmp = mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data;
1586 chan = dma_request_slave_channel_reason(mcasp->dev, tmp);
1587 if (IS_ERR(chan)) {
1588 if (PTR_ERR(chan) != -EPROBE_DEFER)
1589 dev_err(mcasp->dev,
1590 "Can't verify DMA configuration (%ld)\n",
1591 PTR_ERR(chan));
1592 return PTR_ERR(chan);
1593 }
1594 BUG_ON(!chan->device || !chan->device->dev);
1595
1596 if (chan->device->dev->of_node)
1597 ret = of_property_read_string(chan->device->dev->of_node,
1598 "compatible", &tmp);
1599 else
1600 dev_dbg(mcasp->dev, "DMA controller has no of-node\n");
1601
1602 dma_release_channel(chan);
1603 if (ret)
1604 return ret;
1605
1606 dev_dbg(mcasp->dev, "DMA controller compatible = \"%s\"\n", tmp);
1607 if (!strncmp(tmp, sdma_prefix, strlen(sdma_prefix)))
1608 return PCM_SDMA;
1609
1610 return PCM_EDMA;
1611 }
1612
1613 static int davinci_mcasp_probe(struct platform_device *pdev)
1614 {
1615 struct snd_dmaengine_dai_dma_data *dma_data;
1616 struct resource *mem, *res, *dat;
1617 struct davinci_mcasp_pdata *pdata;
1618 struct davinci_mcasp *mcasp;
1619 char *irq_name;
1620 int *dma;
1621 int irq;
1622 int ret;
1623
1624 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
1625 dev_err(&pdev->dev, "No platform data supplied\n");
1626 return -EINVAL;
1627 }
1628
1629 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
1630 GFP_KERNEL);
1631 if (!mcasp)
1632 return -ENOMEM;
1633
1634 pdata = davinci_mcasp_set_pdata_from_of(pdev);
1635 if (!pdata) {
1636 dev_err(&pdev->dev, "no platform data\n");
1637 return -EINVAL;
1638 }
1639
1640 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1641 if (!mem) {
1642 dev_warn(mcasp->dev,
1643 "\"mpu\" mem resource not found, using index 0\n");
1644 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1645 if (!mem) {
1646 dev_err(&pdev->dev, "no mem resource?\n");
1647 return -ENODEV;
1648 }
1649 }
1650
1651 mcasp->base = devm_ioremap_resource(&pdev->dev, mem);
1652 if (IS_ERR(mcasp->base))
1653 return PTR_ERR(mcasp->base);
1654
1655 pm_runtime_enable(&pdev->dev);
1656
1657 mcasp->op_mode = pdata->op_mode;
1658 /* sanity check for tdm slots parameter */
1659 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) {
1660 if (pdata->tdm_slots < 2) {
1661 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
1662 pdata->tdm_slots);
1663 mcasp->tdm_slots = 2;
1664 } else if (pdata->tdm_slots > 32) {
1665 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
1666 pdata->tdm_slots);
1667 mcasp->tdm_slots = 32;
1668 } else {
1669 mcasp->tdm_slots = pdata->tdm_slots;
1670 }
1671 }
1672
1673 mcasp->num_serializer = pdata->num_serializer;
1674 #ifdef CONFIG_PM_SLEEP
1675 mcasp->context.xrsr_regs = devm_kzalloc(&pdev->dev,
1676 sizeof(u32) * mcasp->num_serializer,
1677 GFP_KERNEL);
1678 #endif
1679 mcasp->serial_dir = pdata->serial_dir;
1680 mcasp->version = pdata->version;
1681 mcasp->txnumevt = pdata->txnumevt;
1682 mcasp->rxnumevt = pdata->rxnumevt;
1683
1684 mcasp->dev = &pdev->dev;
1685
1686 irq = platform_get_irq_byname(pdev, "common");
1687 if (irq >= 0) {
1688 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common\n",
1689 dev_name(&pdev->dev));
1690 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1691 davinci_mcasp_common_irq_handler,
1692 IRQF_ONESHOT | IRQF_SHARED,
1693 irq_name, mcasp);
1694 if (ret) {
1695 dev_err(&pdev->dev, "common IRQ request failed\n");
1696 goto err;
1697 }
1698
1699 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
1700 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
1701 }
1702
1703 irq = platform_get_irq_byname(pdev, "rx");
1704 if (irq >= 0) {
1705 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx\n",
1706 dev_name(&pdev->dev));
1707 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1708 davinci_mcasp_rx_irq_handler,
1709 IRQF_ONESHOT, irq_name, mcasp);
1710 if (ret) {
1711 dev_err(&pdev->dev, "RX IRQ request failed\n");
1712 goto err;
1713 }
1714
1715 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
1716 }
1717
1718 irq = platform_get_irq_byname(pdev, "tx");
1719 if (irq >= 0) {
1720 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx\n",
1721 dev_name(&pdev->dev));
1722 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1723 davinci_mcasp_tx_irq_handler,
1724 IRQF_ONESHOT, irq_name, mcasp);
1725 if (ret) {
1726 dev_err(&pdev->dev, "TX IRQ request failed\n");
1727 goto err;
1728 }
1729
1730 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
1731 }
1732
1733 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1734 if (dat)
1735 mcasp->dat_port = true;
1736
1737 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1738 if (dat)
1739 dma_data->addr = dat->start;
1740 else
1741 dma_data->addr = mem->start + pdata->tx_dma_offset;
1742
1743 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
1744 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1745 if (res)
1746 *dma = res->start;
1747 else
1748 *dma = pdata->tx_dma_channel;
1749
1750 /* dmaengine filter data for DT and non-DT boot */
1751 if (pdev->dev.of_node)
1752 dma_data->filter_data = "tx";
1753 else
1754 dma_data->filter_data = dma;
1755
1756 /* RX is not valid in DIT mode */
1757 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
1758 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1759 if (dat)
1760 dma_data->addr = dat->start;
1761 else
1762 dma_data->addr = mem->start + pdata->rx_dma_offset;
1763
1764 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_CAPTURE];
1765 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1766 if (res)
1767 *dma = res->start;
1768 else
1769 *dma = pdata->rx_dma_channel;
1770
1771 /* dmaengine filter data for DT and non-DT boot */
1772 if (pdev->dev.of_node)
1773 dma_data->filter_data = "rx";
1774 else
1775 dma_data->filter_data = dma;
1776 }
1777
1778 if (mcasp->version < MCASP_VERSION_3) {
1779 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1780 /* dma_params->dma_addr is pointing to the data port address */
1781 mcasp->dat_port = true;
1782 } else {
1783 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1784 }
1785
1786 ret = davinci_mcasp_init_ch_constraints(mcasp);
1787 if (ret)
1788 goto err;
1789
1790 dev_set_drvdata(&pdev->dev, mcasp);
1791
1792 mcasp_reparent_fck(pdev);
1793
1794 ret = devm_snd_soc_register_component(&pdev->dev,
1795 &davinci_mcasp_component,
1796 &davinci_mcasp_dai[pdata->op_mode], 1);
1797
1798 if (ret != 0)
1799 goto err;
1800
1801 ret = davinci_mcasp_get_dma_type(mcasp);
1802 switch (ret) {
1803 case PCM_EDMA:
1804 #if IS_BUILTIN(CONFIG_SND_EDMA_SOC) || \
1805 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1806 IS_MODULE(CONFIG_SND_EDMA_SOC))
1807 ret = edma_pcm_platform_register(&pdev->dev);
1808 #else
1809 dev_err(&pdev->dev, "Missing SND_EDMA_SOC\n");
1810 ret = -EINVAL;
1811 goto err;
1812 #endif
1813 break;
1814 case PCM_SDMA:
1815 #if IS_BUILTIN(CONFIG_SND_OMAP_SOC) || \
1816 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1817 IS_MODULE(CONFIG_SND_OMAP_SOC))
1818 ret = omap_pcm_platform_register(&pdev->dev);
1819 #else
1820 dev_err(&pdev->dev, "Missing SND_SDMA_SOC\n");
1821 ret = -EINVAL;
1822 goto err;
1823 #endif
1824 break;
1825 default:
1826 dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
1827 case -EPROBE_DEFER:
1828 goto err;
1829 break;
1830 }
1831
1832 if (ret) {
1833 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1834 goto err;
1835 }
1836
1837 return 0;
1838
1839 err:
1840 pm_runtime_disable(&pdev->dev);
1841 return ret;
1842 }
1843
1844 static int davinci_mcasp_remove(struct platform_device *pdev)
1845 {
1846 pm_runtime_disable(&pdev->dev);
1847
1848 return 0;
1849 }
1850
1851 static struct platform_driver davinci_mcasp_driver = {
1852 .probe = davinci_mcasp_probe,
1853 .remove = davinci_mcasp_remove,
1854 .driver = {
1855 .name = "davinci-mcasp",
1856 .of_match_table = mcasp_dt_ids,
1857 },
1858 };
1859
1860 module_platform_driver(davinci_mcasp_driver);
1861
1862 MODULE_AUTHOR("Steve Chen");
1863 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1864 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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