2 * ALSA SoC McASP Audio Layer for TI DAVINCI processor
4 * Multi-channel Audio Serial Port Driver
6 * Author: Nirmal Pandey <n-pandey@ti.com>,
7 * Suresh Rajashekara <suresh.r@ti.com>
8 * Steve Chen <schen@.mvista.com>
10 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
11 * Copyright: (C) 2009 Texas Instruments, India
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.
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>
24 #include <linux/clk.h>
25 #include <linux/pm_runtime.h>
27 #include <linux/of_platform.h>
28 #include <linux/of_device.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/initval.h>
34 #include <sound/soc.h>
35 #include <sound/dmaengine_pcm.h>
36 #include <sound/omap-pcm.h>
38 #include "davinci-pcm.h"
39 #include "davinci-mcasp.h"
41 #define MCASP_MAX_AFIFO_DEPTH 64
43 struct davinci_mcasp_context {
53 struct davinci_mcasp {
54 struct davinci_pcm_dma_params dma_params[2];
55 struct snd_dmaengine_dai_dma_data dma_data[2];
60 /* McASP specific data */
72 /* McASP FIFO related */
78 #ifdef CONFIG_PM_SLEEP
79 struct davinci_mcasp_context context;
83 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
86 void __iomem *reg = mcasp->base + offset;
87 __raw_writel(__raw_readl(reg) | val, reg);
90 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
93 void __iomem *reg = mcasp->base + offset;
94 __raw_writel((__raw_readl(reg) & ~(val)), reg);
97 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
100 void __iomem *reg = mcasp->base + offset;
101 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
104 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
107 __raw_writel(val, mcasp->base + offset);
110 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
112 return (u32)__raw_readl(mcasp->base + offset);
115 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
119 mcasp_set_bits(mcasp, ctl_reg, val);
121 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
122 /* loop count is to avoid the lock-up */
123 for (i = 0; i < 1000; i++) {
124 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
128 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
129 printk(KERN_ERR "GBLCTL write error\n");
132 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
134 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
135 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
137 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
140 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
142 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
143 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
146 * When ASYNC == 0 the transmit and receive sections operate
147 * synchronously from the transmit clock and frame sync. We need to make
148 * sure that the TX signlas are enabled when starting reception.
150 if (mcasp_is_synchronous(mcasp)) {
151 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
152 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
155 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
156 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
158 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
159 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
160 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
162 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
163 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
165 if (mcasp_is_synchronous(mcasp))
166 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
169 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
174 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
175 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
176 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
177 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
179 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
180 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
181 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
182 for (i = 0; i < mcasp->num_serializer; i++) {
183 if (mcasp->serial_dir[i] == TX_MODE) {
189 /* wait for TX ready */
191 while (!(mcasp_get_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(offset)) &
192 TXSTATE) && (cnt < 100000))
195 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
198 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
204 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
205 if (mcasp->txnumevt) { /* enable FIFO */
206 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
207 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
208 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
210 mcasp_start_tx(mcasp);
212 if (mcasp->rxnumevt) { /* enable FIFO */
213 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
214 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
215 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
217 mcasp_start_rx(mcasp);
221 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
224 * In synchronous mode stop the TX clocks if no other stream is
227 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
228 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
230 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
231 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
234 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
239 * In synchronous mode keep TX clocks running if the capture stream is
242 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
243 val = TXHCLKRST | TXCLKRST | TXFSRST;
245 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
246 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
249 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
255 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
256 if (mcasp->txnumevt) { /* disable FIFO */
257 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
258 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
260 mcasp_stop_tx(mcasp);
262 if (mcasp->rxnumevt) { /* disable FIFO */
263 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
264 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
266 mcasp_stop_rx(mcasp);
270 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
273 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
279 pm_runtime_get_sync(mcasp->dev);
280 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
281 case SND_SOC_DAIFMT_DSP_A:
282 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
283 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
284 /* 1st data bit occur one ACLK cycle after the frame sync */
287 case SND_SOC_DAIFMT_DSP_B:
288 case SND_SOC_DAIFMT_AC97:
289 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
290 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
291 /* No delay after FS */
294 case SND_SOC_DAIFMT_I2S:
295 /* configure a full-word SYNC pulse (LRCLK) */
296 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
297 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
298 /* 1st data bit occur one ACLK cycle after the frame sync */
300 /* FS need to be inverted */
303 case SND_SOC_DAIFMT_LEFT_J:
304 /* configure a full-word SYNC pulse (LRCLK) */
305 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
306 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
307 /* No delay after FS */
315 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
317 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
320 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
321 case SND_SOC_DAIFMT_CBS_CFS:
322 /* codec is clock and frame slave */
323 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
324 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
326 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
327 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
329 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
330 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
331 mcasp->bclk_master = 1;
333 case SND_SOC_DAIFMT_CBM_CFS:
334 /* codec is clock master and frame slave */
335 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
336 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
338 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
339 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
341 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
342 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
343 mcasp->bclk_master = 0;
345 case SND_SOC_DAIFMT_CBM_CFM:
346 /* codec is clock and frame master */
347 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
348 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
350 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
351 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
353 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG,
354 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
355 mcasp->bclk_master = 0;
362 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
363 case SND_SOC_DAIFMT_IB_NF:
364 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
365 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
366 fs_pol_rising = true;
368 case SND_SOC_DAIFMT_NB_IF:
369 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
370 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
371 fs_pol_rising = false;
373 case SND_SOC_DAIFMT_IB_IF:
374 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
375 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
376 fs_pol_rising = false;
378 case SND_SOC_DAIFMT_NB_NF:
379 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
380 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
381 fs_pol_rising = true;
389 fs_pol_rising = !fs_pol_rising;
392 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
393 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
395 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
396 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
399 pm_runtime_put_sync(mcasp->dev);
403 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
405 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
408 case 0: /* MCLK divider */
409 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
410 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
411 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
412 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
415 case 1: /* BCLK divider */
416 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
417 ACLKXDIV(div - 1), ACLKXDIV_MASK);
418 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
419 ACLKRDIV(div - 1), ACLKRDIV_MASK);
422 case 2: /* BCLK/LRCLK ratio */
423 mcasp->bclk_lrclk_ratio = div;
433 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
434 unsigned int freq, int dir)
436 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
438 if (dir == SND_SOC_CLOCK_OUT) {
439 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
440 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
441 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
443 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
444 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
445 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
448 mcasp->sysclk_freq = freq;
453 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
457 u32 tx_rotate = (word_length / 4) & 0x7;
458 u32 rx_rotate = (32 - word_length) / 4;
459 u32 mask = (1ULL << word_length) - 1;
462 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
463 * callback, take it into account here. That allows us to for example
464 * send 32 bits per channel to the codec, while only 16 of them carry
466 * The clock ratio is given for a full period of data (for I2S format
467 * both left and right channels), so it has to be divided by number of
468 * tdm-slots (for I2S - divided by 2).
470 if (mcasp->bclk_lrclk_ratio)
471 word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
473 /* mapping of the XSSZ bit-field as described in the datasheet */
474 fmt = (word_length >> 1) - 1;
476 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
477 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
479 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
481 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
483 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
485 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
488 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
493 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
494 int period_words, int channels)
496 struct davinci_pcm_dma_params *dma_params = &mcasp->dma_params[stream];
497 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
501 u8 slots = mcasp->tdm_slots;
502 u8 max_active_serializers = (channels + slots - 1) / slots;
503 int active_serializers, numevt, n;
505 /* Default configuration */
506 if (mcasp->version < MCASP_VERSION_3)
507 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
509 /* All PINS as McASP */
510 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
512 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
513 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
514 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
516 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
517 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
520 for (i = 0; i < mcasp->num_serializer; i++) {
521 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
522 mcasp->serial_dir[i]);
523 if (mcasp->serial_dir[i] == TX_MODE &&
524 tx_ser < max_active_serializers) {
525 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
527 } else if (mcasp->serial_dir[i] == RX_MODE &&
528 rx_ser < max_active_serializers) {
529 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
532 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
533 SRMOD_INACTIVE, SRMOD_MASK);
537 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
538 active_serializers = tx_ser;
539 numevt = mcasp->txnumevt;
540 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
542 active_serializers = rx_ser;
543 numevt = mcasp->rxnumevt;
544 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
547 if (active_serializers < max_active_serializers) {
548 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
549 "enabled in mcasp (%d)\n", channels,
550 active_serializers * slots);
554 /* AFIFO is not in use */
556 /* Configure the burst size for platform drivers */
557 if (active_serializers > 1) {
559 * If more than one serializers are in use we have one
560 * DMA request to provide data for all serializers.
561 * For example if three serializers are enabled the DMA
562 * need to transfer three words per DMA request.
564 dma_params->fifo_level = active_serializers;
565 dma_data->maxburst = active_serializers;
567 dma_params->fifo_level = 0;
568 dma_data->maxburst = 0;
573 if (period_words % active_serializers) {
574 dev_err(mcasp->dev, "Invalid combination of period words and "
575 "active serializers: %d, %d\n", period_words,
581 * Calculate the optimal AFIFO depth for platform side:
582 * The number of words for numevt need to be in steps of active
585 n = numevt % active_serializers;
587 numevt += (active_serializers - n);
588 while (period_words % numevt && numevt > 0)
589 numevt -= active_serializers;
591 numevt = active_serializers;
593 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
594 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
596 /* Configure the burst size for platform drivers */
599 dma_params->fifo_level = numevt;
600 dma_data->maxburst = numevt;
605 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
611 if ((mcasp->tdm_slots < 2) || (mcasp->tdm_slots > 32)) {
612 dev_err(mcasp->dev, "tdm slot %d not supported\n",
617 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
618 for (i = 0; i < active_slots; i++)
621 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
623 if (!mcasp->dat_port)
626 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
627 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
628 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
629 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
631 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
632 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
633 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
634 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
640 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp)
642 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
644 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
646 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
647 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
649 /* Set the TX tdm : for all the slots */
650 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
652 /* Set the TX clock controls : div = 1 and internal */
653 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
655 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
657 /* Only 44100 and 48000 are valid, both have the same setting */
658 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
661 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
666 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
667 struct snd_pcm_hw_params *params,
668 struct snd_soc_dai *cpu_dai)
670 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
671 struct davinci_pcm_dma_params *dma_params =
672 &mcasp->dma_params[substream->stream];
674 int channels = params_channels(params);
675 int period_size = params_period_size(params);
678 /* If mcasp is BCLK master we need to set BCLK divider */
679 if (mcasp->bclk_master) {
680 unsigned int bclk_freq = snd_soc_params_to_bclk(params);
681 if (mcasp->sysclk_freq % bclk_freq != 0) {
682 dev_err(mcasp->dev, "Can't produce required BCLK\n");
685 davinci_mcasp_set_clkdiv(
686 cpu_dai, 1, mcasp->sysclk_freq / bclk_freq);
689 ret = mcasp_common_hw_param(mcasp, substream->stream,
690 period_size * channels, channels);
694 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
695 ret = mcasp_dit_hw_param(mcasp);
697 ret = mcasp_i2s_hw_param(mcasp, substream->stream);
702 switch (params_format(params)) {
703 case SNDRV_PCM_FORMAT_U8:
704 case SNDRV_PCM_FORMAT_S8:
705 dma_params->data_type = 1;
709 case SNDRV_PCM_FORMAT_U16_LE:
710 case SNDRV_PCM_FORMAT_S16_LE:
711 dma_params->data_type = 2;
715 case SNDRV_PCM_FORMAT_U24_3LE:
716 case SNDRV_PCM_FORMAT_S24_3LE:
717 dma_params->data_type = 3;
721 case SNDRV_PCM_FORMAT_U24_LE:
722 case SNDRV_PCM_FORMAT_S24_LE:
723 case SNDRV_PCM_FORMAT_U32_LE:
724 case SNDRV_PCM_FORMAT_S32_LE:
725 dma_params->data_type = 4;
730 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
734 if (mcasp->version == MCASP_VERSION_2 && !dma_params->fifo_level)
735 dma_params->acnt = 4;
737 dma_params->acnt = dma_params->data_type;
739 davinci_config_channel_size(mcasp, word_length);
744 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
745 int cmd, struct snd_soc_dai *cpu_dai)
747 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
751 case SNDRV_PCM_TRIGGER_RESUME:
752 case SNDRV_PCM_TRIGGER_START:
753 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
754 davinci_mcasp_start(mcasp, substream->stream);
756 case SNDRV_PCM_TRIGGER_SUSPEND:
757 case SNDRV_PCM_TRIGGER_STOP:
758 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
759 davinci_mcasp_stop(mcasp, substream->stream);
769 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
770 .trigger = davinci_mcasp_trigger,
771 .hw_params = davinci_mcasp_hw_params,
772 .set_fmt = davinci_mcasp_set_dai_fmt,
773 .set_clkdiv = davinci_mcasp_set_clkdiv,
774 .set_sysclk = davinci_mcasp_set_sysclk,
777 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
779 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
781 if (mcasp->version == MCASP_VERSION_4) {
782 /* Using dmaengine PCM */
783 dai->playback_dma_data =
784 &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
785 dai->capture_dma_data =
786 &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
788 /* Using davinci-pcm */
789 dai->playback_dma_data = mcasp->dma_params;
790 dai->capture_dma_data = mcasp->dma_params;
796 #ifdef CONFIG_PM_SLEEP
797 static int davinci_mcasp_suspend(struct snd_soc_dai *dai)
799 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
800 struct davinci_mcasp_context *context = &mcasp->context;
802 context->txfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG);
803 context->rxfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
804 context->txfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMT_REG);
805 context->rxfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMT_REG);
806 context->aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
807 context->aclkrctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG);
808 context->pdir = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
813 static int davinci_mcasp_resume(struct snd_soc_dai *dai)
815 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
816 struct davinci_mcasp_context *context = &mcasp->context;
818 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, context->txfmtctl);
819 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG, context->rxfmtctl);
820 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMT_REG, context->txfmt);
821 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMT_REG, context->rxfmt);
822 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, context->aclkxctl);
823 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, context->aclkrctl);
824 mcasp_set_reg(mcasp, DAVINCI_MCASP_PDIR_REG, context->pdir);
829 #define davinci_mcasp_suspend NULL
830 #define davinci_mcasp_resume NULL
833 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
835 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
836 SNDRV_PCM_FMTBIT_U8 | \
837 SNDRV_PCM_FMTBIT_S16_LE | \
838 SNDRV_PCM_FMTBIT_U16_LE | \
839 SNDRV_PCM_FMTBIT_S24_LE | \
840 SNDRV_PCM_FMTBIT_U24_LE | \
841 SNDRV_PCM_FMTBIT_S24_3LE | \
842 SNDRV_PCM_FMTBIT_U24_3LE | \
843 SNDRV_PCM_FMTBIT_S32_LE | \
844 SNDRV_PCM_FMTBIT_U32_LE)
846 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
848 .name = "davinci-mcasp.0",
849 .probe = davinci_mcasp_dai_probe,
850 .suspend = davinci_mcasp_suspend,
851 .resume = davinci_mcasp_resume,
854 .channels_max = 32 * 16,
855 .rates = DAVINCI_MCASP_RATES,
856 .formats = DAVINCI_MCASP_PCM_FMTS,
860 .channels_max = 32 * 16,
861 .rates = DAVINCI_MCASP_RATES,
862 .formats = DAVINCI_MCASP_PCM_FMTS,
864 .ops = &davinci_mcasp_dai_ops,
868 .name = "davinci-mcasp.1",
869 .probe = davinci_mcasp_dai_probe,
873 .rates = DAVINCI_MCASP_RATES,
874 .formats = DAVINCI_MCASP_PCM_FMTS,
876 .ops = &davinci_mcasp_dai_ops,
881 static const struct snd_soc_component_driver davinci_mcasp_component = {
882 .name = "davinci-mcasp",
885 /* Some HW specific values and defaults. The rest is filled in from DT. */
886 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
887 .tx_dma_offset = 0x400,
888 .rx_dma_offset = 0x400,
889 .asp_chan_q = EVENTQ_0,
890 .version = MCASP_VERSION_1,
893 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
894 .tx_dma_offset = 0x2000,
895 .rx_dma_offset = 0x2000,
896 .asp_chan_q = EVENTQ_0,
897 .version = MCASP_VERSION_2,
900 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
903 .asp_chan_q = EVENTQ_0,
904 .version = MCASP_VERSION_3,
907 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
908 .tx_dma_offset = 0x200,
909 .rx_dma_offset = 0x284,
910 .asp_chan_q = EVENTQ_0,
911 .version = MCASP_VERSION_4,
914 static const struct of_device_id mcasp_dt_ids[] = {
916 .compatible = "ti,dm646x-mcasp-audio",
917 .data = &dm646x_mcasp_pdata,
920 .compatible = "ti,da830-mcasp-audio",
921 .data = &da830_mcasp_pdata,
924 .compatible = "ti,am33xx-mcasp-audio",
925 .data = &am33xx_mcasp_pdata,
928 .compatible = "ti,dra7-mcasp-audio",
929 .data = &dra7_mcasp_pdata,
933 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
935 static int mcasp_reparent_fck(struct platform_device *pdev)
937 struct device_node *node = pdev->dev.of_node;
938 struct clk *gfclk, *parent_clk;
939 const char *parent_name;
945 parent_name = of_get_property(node, "fck_parent", NULL);
949 gfclk = clk_get(&pdev->dev, "fck");
951 dev_err(&pdev->dev, "failed to get fck\n");
952 return PTR_ERR(gfclk);
955 parent_clk = clk_get(NULL, parent_name);
956 if (IS_ERR(parent_clk)) {
957 dev_err(&pdev->dev, "failed to get parent clock\n");
958 ret = PTR_ERR(parent_clk);
962 ret = clk_set_parent(gfclk, parent_clk);
964 dev_err(&pdev->dev, "failed to reparent fck\n");
975 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
976 struct platform_device *pdev)
978 struct device_node *np = pdev->dev.of_node;
979 struct davinci_mcasp_pdata *pdata = NULL;
980 const struct of_device_id *match =
981 of_match_device(mcasp_dt_ids, &pdev->dev);
982 struct of_phandle_args dma_spec;
984 const u32 *of_serial_dir32;
988 if (pdev->dev.platform_data) {
989 pdata = pdev->dev.platform_data;
992 pdata = (struct davinci_mcasp_pdata*) match->data;
994 /* control shouldn't reach here. something is wrong */
999 ret = of_property_read_u32(np, "op-mode", &val);
1001 pdata->op_mode = val;
1003 ret = of_property_read_u32(np, "tdm-slots", &val);
1005 if (val < 2 || val > 32) {
1007 "tdm-slots must be in rage [2-32]\n");
1012 pdata->tdm_slots = val;
1015 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1017 if (of_serial_dir32) {
1018 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1019 (sizeof(*of_serial_dir) * val),
1021 if (!of_serial_dir) {
1026 for (i = 0; i < val; i++)
1027 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1029 pdata->num_serializer = val;
1030 pdata->serial_dir = of_serial_dir;
1033 ret = of_property_match_string(np, "dma-names", "tx");
1037 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1042 pdata->tx_dma_channel = dma_spec.args[0];
1044 ret = of_property_match_string(np, "dma-names", "rx");
1048 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1053 pdata->rx_dma_channel = dma_spec.args[0];
1055 ret = of_property_read_u32(np, "tx-num-evt", &val);
1057 pdata->txnumevt = val;
1059 ret = of_property_read_u32(np, "rx-num-evt", &val);
1061 pdata->rxnumevt = val;
1063 ret = of_property_read_u32(np, "sram-size-playback", &val);
1065 pdata->sram_size_playback = val;
1067 ret = of_property_read_u32(np, "sram-size-capture", &val);
1069 pdata->sram_size_capture = val;
1075 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1082 static int davinci_mcasp_probe(struct platform_device *pdev)
1084 struct davinci_pcm_dma_params *dma_params;
1085 struct snd_dmaengine_dai_dma_data *dma_data;
1086 struct resource *mem, *ioarea, *res, *dat;
1087 struct davinci_mcasp_pdata *pdata;
1088 struct davinci_mcasp *mcasp;
1091 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
1092 dev_err(&pdev->dev, "No platform data supplied\n");
1096 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
1101 pdata = davinci_mcasp_set_pdata_from_of(pdev);
1103 dev_err(&pdev->dev, "no platform data\n");
1107 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1109 dev_warn(mcasp->dev,
1110 "\"mpu\" mem resource not found, using index 0\n");
1111 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1113 dev_err(&pdev->dev, "no mem resource?\n");
1118 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
1119 resource_size(mem), pdev->name);
1121 dev_err(&pdev->dev, "Audio region already claimed\n");
1125 pm_runtime_enable(&pdev->dev);
1127 ret = pm_runtime_get_sync(&pdev->dev);
1128 if (IS_ERR_VALUE(ret)) {
1129 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
1133 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
1135 dev_err(&pdev->dev, "ioremap failed\n");
1140 mcasp->op_mode = pdata->op_mode;
1141 mcasp->tdm_slots = pdata->tdm_slots;
1142 mcasp->num_serializer = pdata->num_serializer;
1143 mcasp->serial_dir = pdata->serial_dir;
1144 mcasp->version = pdata->version;
1145 mcasp->txnumevt = pdata->txnumevt;
1146 mcasp->rxnumevt = pdata->rxnumevt;
1148 mcasp->dev = &pdev->dev;
1150 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1152 mcasp->dat_port = true;
1154 dma_params = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1155 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1156 dma_params->asp_chan_q = pdata->asp_chan_q;
1157 dma_params->ram_chan_q = pdata->ram_chan_q;
1158 dma_params->sram_pool = pdata->sram_pool;
1159 dma_params->sram_size = pdata->sram_size_playback;
1161 dma_params->dma_addr = dat->start;
1163 dma_params->dma_addr = mem->start + pdata->tx_dma_offset;
1165 /* Unconditional dmaengine stuff */
1166 dma_data->addr = dma_params->dma_addr;
1168 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1170 dma_params->channel = res->start;
1172 dma_params->channel = pdata->tx_dma_channel;
1174 /* dmaengine filter data for DT and non-DT boot */
1175 if (pdev->dev.of_node)
1176 dma_data->filter_data = "tx";
1178 dma_data->filter_data = &dma_params->channel;
1180 dma_params = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1181 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1182 dma_params->asp_chan_q = pdata->asp_chan_q;
1183 dma_params->ram_chan_q = pdata->ram_chan_q;
1184 dma_params->sram_pool = pdata->sram_pool;
1185 dma_params->sram_size = pdata->sram_size_capture;
1187 dma_params->dma_addr = dat->start;
1189 dma_params->dma_addr = mem->start + pdata->rx_dma_offset;
1191 /* Unconditional dmaengine stuff */
1192 dma_data->addr = dma_params->dma_addr;
1194 if (mcasp->version < MCASP_VERSION_3) {
1195 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1196 /* dma_params->dma_addr is pointing to the data port address */
1197 mcasp->dat_port = true;
1199 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1202 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1204 dma_params->channel = res->start;
1206 dma_params->channel = pdata->rx_dma_channel;
1208 /* dmaengine filter data for DT and non-DT boot */
1209 if (pdev->dev.of_node)
1210 dma_data->filter_data = "rx";
1212 dma_data->filter_data = &dma_params->channel;
1214 dev_set_drvdata(&pdev->dev, mcasp);
1216 mcasp_reparent_fck(pdev);
1218 ret = devm_snd_soc_register_component(&pdev->dev,
1219 &davinci_mcasp_component,
1220 &davinci_mcasp_dai[pdata->op_mode], 1);
1225 switch (mcasp->version) {
1226 case MCASP_VERSION_1:
1227 case MCASP_VERSION_2:
1228 case MCASP_VERSION_3:
1229 ret = davinci_soc_platform_register(&pdev->dev);
1231 case MCASP_VERSION_4:
1232 ret = omap_pcm_platform_register(&pdev->dev);
1235 dev_err(&pdev->dev, "Invalid McASP version: %d\n",
1242 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1249 pm_runtime_put_sync(&pdev->dev);
1250 pm_runtime_disable(&pdev->dev);
1254 static int davinci_mcasp_remove(struct platform_device *pdev)
1256 pm_runtime_put_sync(&pdev->dev);
1257 pm_runtime_disable(&pdev->dev);
1262 static struct platform_driver davinci_mcasp_driver = {
1263 .probe = davinci_mcasp_probe,
1264 .remove = davinci_mcasp_remove,
1266 .name = "davinci-mcasp",
1267 .owner = THIS_MODULE,
1268 .of_match_table = mcasp_dt_ids,
1272 module_platform_driver(davinci_mcasp_driver);
1274 MODULE_AUTHOR("Steve Chen");
1275 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1276 MODULE_LICENSE("GPL");