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/asoundef.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/initval.h>
35 #include <sound/soc.h>
36 #include <sound/dmaengine_pcm.h>
37 #include <sound/omap-pcm.h>
39 #include "davinci-pcm.h"
41 #include "davinci-mcasp.h"
43 #define MCASP_MAX_AFIFO_DEPTH 64
45 struct davinci_mcasp_context {
55 struct davinci_mcasp {
56 struct davinci_pcm_dma_params dma_params[2];
57 struct snd_dmaengine_dai_dma_data dma_data[2];
62 /* McASP specific data */
75 /* McASP FIFO related */
81 #ifdef CONFIG_PM_SLEEP
82 struct davinci_mcasp_context context;
86 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
89 void __iomem *reg = mcasp->base + offset;
90 __raw_writel(__raw_readl(reg) | val, reg);
93 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
96 void __iomem *reg = mcasp->base + offset;
97 __raw_writel((__raw_readl(reg) & ~(val)), reg);
100 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
103 void __iomem *reg = mcasp->base + offset;
104 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
107 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
110 __raw_writel(val, mcasp->base + offset);
113 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
115 return (u32)__raw_readl(mcasp->base + offset);
118 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
122 mcasp_set_bits(mcasp, ctl_reg, val);
124 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
125 /* loop count is to avoid the lock-up */
126 for (i = 0; i < 1000; i++) {
127 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
131 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
132 printk(KERN_ERR "GBLCTL write error\n");
135 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
137 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
138 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
140 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
143 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
145 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
146 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
149 * When ASYNC == 0 the transmit and receive sections operate
150 * synchronously from the transmit clock and frame sync. We need to make
151 * sure that the TX signlas are enabled when starting reception.
153 if (mcasp_is_synchronous(mcasp)) {
154 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
155 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
158 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
159 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
161 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
162 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
163 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
165 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
166 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
168 if (mcasp_is_synchronous(mcasp))
169 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
172 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
177 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
178 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
179 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
180 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
182 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
183 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
184 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
185 for (i = 0; i < mcasp->num_serializer; i++) {
186 if (mcasp->serial_dir[i] == TX_MODE) {
192 /* wait for TX ready */
194 while (!(mcasp_get_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(offset)) &
195 TXSTATE) && (cnt < 100000))
198 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
201 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
207 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
208 if (mcasp->txnumevt) { /* enable FIFO */
209 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
210 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
211 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
213 mcasp_start_tx(mcasp);
215 if (mcasp->rxnumevt) { /* enable FIFO */
216 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
217 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
218 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
220 mcasp_start_rx(mcasp);
224 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
227 * In synchronous mode stop the TX clocks if no other stream is
230 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
231 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
233 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
234 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
237 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
242 * In synchronous mode keep TX clocks running if the capture stream is
245 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
246 val = TXHCLKRST | TXCLKRST | TXFSRST;
248 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
249 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
252 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
258 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
259 if (mcasp->txnumevt) { /* disable FIFO */
260 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
261 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
263 mcasp_stop_tx(mcasp);
265 if (mcasp->rxnumevt) { /* disable FIFO */
266 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
267 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
269 mcasp_stop_rx(mcasp);
273 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
276 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
282 pm_runtime_get_sync(mcasp->dev);
283 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
284 case SND_SOC_DAIFMT_DSP_A:
285 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
286 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
287 /* 1st data bit occur one ACLK cycle after the frame sync */
290 case SND_SOC_DAIFMT_DSP_B:
291 case SND_SOC_DAIFMT_AC97:
292 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
293 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
294 /* No delay after FS */
297 case SND_SOC_DAIFMT_I2S:
298 /* configure a full-word SYNC pulse (LRCLK) */
299 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
300 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
301 /* 1st data bit occur one ACLK cycle after the frame sync */
303 /* FS need to be inverted */
306 case SND_SOC_DAIFMT_LEFT_J:
307 /* configure a full-word SYNC pulse (LRCLK) */
308 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
309 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
310 /* No delay after FS */
318 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
320 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
323 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
324 case SND_SOC_DAIFMT_CBS_CFS:
325 /* codec is clock and frame slave */
326 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
327 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
329 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
330 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
332 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
333 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
334 mcasp->bclk_master = 1;
336 case SND_SOC_DAIFMT_CBM_CFS:
337 /* codec is clock master and frame slave */
338 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
339 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
341 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
342 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
344 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
345 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
346 mcasp->bclk_master = 0;
348 case SND_SOC_DAIFMT_CBM_CFM:
349 /* codec is clock and frame master */
350 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
351 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
353 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
354 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
356 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG,
357 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
358 mcasp->bclk_master = 0;
365 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
366 case SND_SOC_DAIFMT_IB_NF:
367 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
368 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
369 fs_pol_rising = true;
371 case SND_SOC_DAIFMT_NB_IF:
372 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
373 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
374 fs_pol_rising = false;
376 case SND_SOC_DAIFMT_IB_IF:
377 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
378 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
379 fs_pol_rising = false;
381 case SND_SOC_DAIFMT_NB_NF:
382 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
383 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
384 fs_pol_rising = true;
392 fs_pol_rising = !fs_pol_rising;
395 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
396 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
398 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
399 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
402 pm_runtime_put_sync(mcasp->dev);
406 static int __davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
407 int div, bool explicit)
409 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
412 case 0: /* MCLK divider */
413 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
414 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
415 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
416 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
419 case 1: /* BCLK divider */
420 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
421 ACLKXDIV(div - 1), ACLKXDIV_MASK);
422 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
423 ACLKRDIV(div - 1), ACLKRDIV_MASK);
425 mcasp->bclk_div = div;
428 case 2: /* BCLK/LRCLK ratio */
429 mcasp->bclk_lrclk_ratio = div;
439 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
442 return __davinci_mcasp_set_clkdiv(dai, div_id, div, 1);
445 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
446 unsigned int freq, int dir)
448 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
450 if (dir == SND_SOC_CLOCK_OUT) {
451 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
452 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
453 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
455 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
456 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
457 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
460 mcasp->sysclk_freq = freq;
465 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
469 u32 tx_rotate = (word_length / 4) & 0x7;
470 u32 rx_rotate = (32 - word_length) / 4;
471 u32 mask = (1ULL << word_length) - 1;
474 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
475 * callback, take it into account here. That allows us to for example
476 * send 32 bits per channel to the codec, while only 16 of them carry
478 * The clock ratio is given for a full period of data (for I2S format
479 * both left and right channels), so it has to be divided by number of
480 * tdm-slots (for I2S - divided by 2).
482 if (mcasp->bclk_lrclk_ratio)
483 word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
485 /* mapping of the XSSZ bit-field as described in the datasheet */
486 fmt = (word_length >> 1) - 1;
488 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
489 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
491 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
493 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
495 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
497 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
500 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
505 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
506 int period_words, int channels)
508 struct davinci_pcm_dma_params *dma_params = &mcasp->dma_params[stream];
509 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
513 u8 slots = mcasp->tdm_slots;
514 u8 max_active_serializers = (channels + slots - 1) / slots;
515 int active_serializers, numevt, n;
517 /* Default configuration */
518 if (mcasp->version < MCASP_VERSION_3)
519 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
521 /* All PINS as McASP */
522 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
524 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
525 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
526 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
528 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
529 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
532 for (i = 0; i < mcasp->num_serializer; i++) {
533 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
534 mcasp->serial_dir[i]);
535 if (mcasp->serial_dir[i] == TX_MODE &&
536 tx_ser < max_active_serializers) {
537 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
539 } else if (mcasp->serial_dir[i] == RX_MODE &&
540 rx_ser < max_active_serializers) {
541 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
544 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
545 SRMOD_INACTIVE, SRMOD_MASK);
549 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
550 active_serializers = tx_ser;
551 numevt = mcasp->txnumevt;
552 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
554 active_serializers = rx_ser;
555 numevt = mcasp->rxnumevt;
556 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
559 if (active_serializers < max_active_serializers) {
560 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
561 "enabled in mcasp (%d)\n", channels,
562 active_serializers * slots);
566 /* AFIFO is not in use */
568 /* Configure the burst size for platform drivers */
569 if (active_serializers > 1) {
571 * If more than one serializers are in use we have one
572 * DMA request to provide data for all serializers.
573 * For example if three serializers are enabled the DMA
574 * need to transfer three words per DMA request.
576 dma_params->fifo_level = active_serializers;
577 dma_data->maxburst = active_serializers;
579 dma_params->fifo_level = 0;
580 dma_data->maxburst = 0;
585 if (period_words % active_serializers) {
586 dev_err(mcasp->dev, "Invalid combination of period words and "
587 "active serializers: %d, %d\n", period_words,
593 * Calculate the optimal AFIFO depth for platform side:
594 * The number of words for numevt need to be in steps of active
597 n = numevt % active_serializers;
599 numevt += (active_serializers - n);
600 while (period_words % numevt && numevt > 0)
601 numevt -= active_serializers;
603 numevt = active_serializers;
605 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
606 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
608 /* Configure the burst size for platform drivers */
611 dma_params->fifo_level = numevt;
612 dma_data->maxburst = numevt;
617 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
623 if ((mcasp->tdm_slots < 2) || (mcasp->tdm_slots > 32)) {
624 dev_err(mcasp->dev, "tdm slot %d not supported\n",
629 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
630 for (i = 0; i < active_slots; i++)
633 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
635 if (!mcasp->dat_port)
638 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
639 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
640 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
641 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
643 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
644 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
645 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
646 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
652 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
656 u8 *cs_bytes = (u8*) &cs_value;
658 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
660 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
662 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
663 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
665 /* Set the TX tdm : for all the slots */
666 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
668 /* Set the TX clock controls : div = 1 and internal */
669 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
671 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
673 /* Only 44100 and 48000 are valid, both have the same setting */
674 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
677 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
679 /* Set S/PDIF channel status bits */
680 cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
681 cs_bytes[1] = IEC958_AES1_CON_PCM_CODER;
685 cs_bytes[3] |= IEC958_AES3_CON_FS_22050;
688 cs_bytes[3] |= IEC958_AES3_CON_FS_24000;
691 cs_bytes[3] |= IEC958_AES3_CON_FS_32000;
694 cs_bytes[3] |= IEC958_AES3_CON_FS_44100;
697 cs_bytes[3] |= IEC958_AES3_CON_FS_48000;
700 cs_bytes[3] |= IEC958_AES3_CON_FS_88200;
703 cs_bytes[3] |= IEC958_AES3_CON_FS_96000;
706 cs_bytes[3] |= IEC958_AES3_CON_FS_176400;
709 cs_bytes[3] |= IEC958_AES3_CON_FS_192000;
712 printk(KERN_WARNING "unsupported sampling rate: %d\n", rate);
716 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value);
717 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value);
722 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
723 struct snd_pcm_hw_params *params,
724 struct snd_soc_dai *cpu_dai)
726 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
727 struct davinci_pcm_dma_params *dma_params =
728 &mcasp->dma_params[substream->stream];
730 int channels = params_channels(params);
731 int period_size = params_period_size(params);
735 * If mcasp is BCLK master, and a BCLK divider was not provided by
736 * the machine driver, we need to calculate the ratio.
738 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
739 unsigned int bclk_freq = snd_soc_params_to_bclk(params);
740 unsigned int div = mcasp->sysclk_freq / bclk_freq;
741 if (mcasp->sysclk_freq % bclk_freq != 0) {
742 if (((mcasp->sysclk_freq / div) - bclk_freq) >
743 (bclk_freq - (mcasp->sysclk_freq / (div+1))))
746 "Inaccurate BCLK: %u Hz / %u != %u Hz\n",
747 mcasp->sysclk_freq, div, bclk_freq);
749 __davinci_mcasp_set_clkdiv(cpu_dai, 1, div, 0);
752 ret = mcasp_common_hw_param(mcasp, substream->stream,
753 period_size * channels, channels);
757 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
758 ret = mcasp_dit_hw_param(mcasp, params_rate(params));
760 ret = mcasp_i2s_hw_param(mcasp, substream->stream);
765 switch (params_format(params)) {
766 case SNDRV_PCM_FORMAT_U8:
767 case SNDRV_PCM_FORMAT_S8:
768 dma_params->data_type = 1;
772 case SNDRV_PCM_FORMAT_U16_LE:
773 case SNDRV_PCM_FORMAT_S16_LE:
774 dma_params->data_type = 2;
778 case SNDRV_PCM_FORMAT_U24_3LE:
779 case SNDRV_PCM_FORMAT_S24_3LE:
780 dma_params->data_type = 3;
784 case SNDRV_PCM_FORMAT_U24_LE:
785 case SNDRV_PCM_FORMAT_S24_LE:
786 dma_params->data_type = 4;
790 case SNDRV_PCM_FORMAT_U32_LE:
791 case SNDRV_PCM_FORMAT_S32_LE:
792 dma_params->data_type = 4;
797 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
801 if (mcasp->version == MCASP_VERSION_2 && !dma_params->fifo_level)
802 dma_params->acnt = 4;
804 dma_params->acnt = dma_params->data_type;
806 davinci_config_channel_size(mcasp, word_length);
811 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
812 int cmd, struct snd_soc_dai *cpu_dai)
814 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
818 case SNDRV_PCM_TRIGGER_RESUME:
819 case SNDRV_PCM_TRIGGER_START:
820 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
821 davinci_mcasp_start(mcasp, substream->stream);
823 case SNDRV_PCM_TRIGGER_SUSPEND:
824 case SNDRV_PCM_TRIGGER_STOP:
825 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
826 davinci_mcasp_stop(mcasp, substream->stream);
836 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
837 .trigger = davinci_mcasp_trigger,
838 .hw_params = davinci_mcasp_hw_params,
839 .set_fmt = davinci_mcasp_set_dai_fmt,
840 .set_clkdiv = davinci_mcasp_set_clkdiv,
841 .set_sysclk = davinci_mcasp_set_sysclk,
844 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
846 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
848 if (mcasp->version >= MCASP_VERSION_3) {
849 /* Using dmaengine PCM */
850 dai->playback_dma_data =
851 &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
852 dai->capture_dma_data =
853 &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
855 /* Using davinci-pcm */
856 dai->playback_dma_data = mcasp->dma_params;
857 dai->capture_dma_data = mcasp->dma_params;
863 #ifdef CONFIG_PM_SLEEP
864 static int davinci_mcasp_suspend(struct snd_soc_dai *dai)
866 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
867 struct davinci_mcasp_context *context = &mcasp->context;
869 context->txfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG);
870 context->rxfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
871 context->txfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMT_REG);
872 context->rxfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMT_REG);
873 context->aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
874 context->aclkrctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG);
875 context->pdir = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
880 static int davinci_mcasp_resume(struct snd_soc_dai *dai)
882 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
883 struct davinci_mcasp_context *context = &mcasp->context;
885 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, context->txfmtctl);
886 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG, context->rxfmtctl);
887 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMT_REG, context->txfmt);
888 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMT_REG, context->rxfmt);
889 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, context->aclkxctl);
890 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, context->aclkrctl);
891 mcasp_set_reg(mcasp, DAVINCI_MCASP_PDIR_REG, context->pdir);
896 #define davinci_mcasp_suspend NULL
897 #define davinci_mcasp_resume NULL
900 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
902 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
903 SNDRV_PCM_FMTBIT_U8 | \
904 SNDRV_PCM_FMTBIT_S16_LE | \
905 SNDRV_PCM_FMTBIT_U16_LE | \
906 SNDRV_PCM_FMTBIT_S24_LE | \
907 SNDRV_PCM_FMTBIT_U24_LE | \
908 SNDRV_PCM_FMTBIT_S24_3LE | \
909 SNDRV_PCM_FMTBIT_U24_3LE | \
910 SNDRV_PCM_FMTBIT_S32_LE | \
911 SNDRV_PCM_FMTBIT_U32_LE)
913 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
915 .name = "davinci-mcasp.0",
916 .probe = davinci_mcasp_dai_probe,
917 .suspend = davinci_mcasp_suspend,
918 .resume = davinci_mcasp_resume,
921 .channels_max = 32 * 16,
922 .rates = DAVINCI_MCASP_RATES,
923 .formats = DAVINCI_MCASP_PCM_FMTS,
927 .channels_max = 32 * 16,
928 .rates = DAVINCI_MCASP_RATES,
929 .formats = DAVINCI_MCASP_PCM_FMTS,
931 .ops = &davinci_mcasp_dai_ops,
935 .name = "davinci-mcasp.1",
936 .probe = davinci_mcasp_dai_probe,
940 .rates = DAVINCI_MCASP_RATES,
941 .formats = DAVINCI_MCASP_PCM_FMTS,
943 .ops = &davinci_mcasp_dai_ops,
948 static const struct snd_soc_component_driver davinci_mcasp_component = {
949 .name = "davinci-mcasp",
952 /* Some HW specific values and defaults. The rest is filled in from DT. */
953 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
954 .tx_dma_offset = 0x400,
955 .rx_dma_offset = 0x400,
956 .asp_chan_q = EVENTQ_0,
957 .version = MCASP_VERSION_1,
960 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
961 .tx_dma_offset = 0x2000,
962 .rx_dma_offset = 0x2000,
963 .asp_chan_q = EVENTQ_0,
964 .version = MCASP_VERSION_2,
967 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
970 .asp_chan_q = EVENTQ_0,
971 .version = MCASP_VERSION_3,
974 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
975 .tx_dma_offset = 0x200,
976 .rx_dma_offset = 0x284,
977 .asp_chan_q = EVENTQ_0,
978 .version = MCASP_VERSION_4,
981 static const struct of_device_id mcasp_dt_ids[] = {
983 .compatible = "ti,dm646x-mcasp-audio",
984 .data = &dm646x_mcasp_pdata,
987 .compatible = "ti,da830-mcasp-audio",
988 .data = &da830_mcasp_pdata,
991 .compatible = "ti,am33xx-mcasp-audio",
992 .data = &am33xx_mcasp_pdata,
995 .compatible = "ti,dra7-mcasp-audio",
996 .data = &dra7_mcasp_pdata,
1000 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1002 static int mcasp_reparent_fck(struct platform_device *pdev)
1004 struct device_node *node = pdev->dev.of_node;
1005 struct clk *gfclk, *parent_clk;
1006 const char *parent_name;
1012 parent_name = of_get_property(node, "fck_parent", NULL);
1016 gfclk = clk_get(&pdev->dev, "fck");
1017 if (IS_ERR(gfclk)) {
1018 dev_err(&pdev->dev, "failed to get fck\n");
1019 return PTR_ERR(gfclk);
1022 parent_clk = clk_get(NULL, parent_name);
1023 if (IS_ERR(parent_clk)) {
1024 dev_err(&pdev->dev, "failed to get parent clock\n");
1025 ret = PTR_ERR(parent_clk);
1029 ret = clk_set_parent(gfclk, parent_clk);
1031 dev_err(&pdev->dev, "failed to reparent fck\n");
1036 clk_put(parent_clk);
1042 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
1043 struct platform_device *pdev)
1045 struct device_node *np = pdev->dev.of_node;
1046 struct davinci_mcasp_pdata *pdata = NULL;
1047 const struct of_device_id *match =
1048 of_match_device(mcasp_dt_ids, &pdev->dev);
1049 struct of_phandle_args dma_spec;
1051 const u32 *of_serial_dir32;
1055 if (pdev->dev.platform_data) {
1056 pdata = pdev->dev.platform_data;
1059 pdata = (struct davinci_mcasp_pdata*) match->data;
1061 /* control shouldn't reach here. something is wrong */
1066 ret = of_property_read_u32(np, "op-mode", &val);
1068 pdata->op_mode = val;
1070 ret = of_property_read_u32(np, "tdm-slots", &val);
1072 if (val < 2 || val > 32) {
1074 "tdm-slots must be in rage [2-32]\n");
1079 pdata->tdm_slots = val;
1082 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1084 if (of_serial_dir32) {
1085 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1086 (sizeof(*of_serial_dir) * val),
1088 if (!of_serial_dir) {
1093 for (i = 0; i < val; i++)
1094 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1096 pdata->num_serializer = val;
1097 pdata->serial_dir = of_serial_dir;
1100 ret = of_property_match_string(np, "dma-names", "tx");
1104 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1109 pdata->tx_dma_channel = dma_spec.args[0];
1111 ret = of_property_match_string(np, "dma-names", "rx");
1115 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1120 pdata->rx_dma_channel = dma_spec.args[0];
1122 ret = of_property_read_u32(np, "tx-num-evt", &val);
1124 pdata->txnumevt = val;
1126 ret = of_property_read_u32(np, "rx-num-evt", &val);
1128 pdata->rxnumevt = val;
1130 ret = of_property_read_u32(np, "sram-size-playback", &val);
1132 pdata->sram_size_playback = val;
1134 ret = of_property_read_u32(np, "sram-size-capture", &val);
1136 pdata->sram_size_capture = val;
1142 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1149 static int davinci_mcasp_probe(struct platform_device *pdev)
1151 struct davinci_pcm_dma_params *dma_params;
1152 struct snd_dmaengine_dai_dma_data *dma_data;
1153 struct resource *mem, *ioarea, *res, *dat;
1154 struct davinci_mcasp_pdata *pdata;
1155 struct davinci_mcasp *mcasp;
1158 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
1159 dev_err(&pdev->dev, "No platform data supplied\n");
1163 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
1168 pdata = davinci_mcasp_set_pdata_from_of(pdev);
1170 dev_err(&pdev->dev, "no platform data\n");
1174 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1176 dev_warn(mcasp->dev,
1177 "\"mpu\" mem resource not found, using index 0\n");
1178 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1180 dev_err(&pdev->dev, "no mem resource?\n");
1185 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
1186 resource_size(mem), pdev->name);
1188 dev_err(&pdev->dev, "Audio region already claimed\n");
1192 pm_runtime_enable(&pdev->dev);
1194 ret = pm_runtime_get_sync(&pdev->dev);
1195 if (IS_ERR_VALUE(ret)) {
1196 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
1200 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
1202 dev_err(&pdev->dev, "ioremap failed\n");
1207 mcasp->op_mode = pdata->op_mode;
1208 mcasp->tdm_slots = pdata->tdm_slots;
1209 mcasp->num_serializer = pdata->num_serializer;
1210 mcasp->serial_dir = pdata->serial_dir;
1211 mcasp->version = pdata->version;
1212 mcasp->txnumevt = pdata->txnumevt;
1213 mcasp->rxnumevt = pdata->rxnumevt;
1215 mcasp->dev = &pdev->dev;
1217 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1219 mcasp->dat_port = true;
1221 dma_params = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1222 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1223 dma_params->asp_chan_q = pdata->asp_chan_q;
1224 dma_params->ram_chan_q = pdata->ram_chan_q;
1225 dma_params->sram_pool = pdata->sram_pool;
1226 dma_params->sram_size = pdata->sram_size_playback;
1228 dma_params->dma_addr = dat->start;
1230 dma_params->dma_addr = mem->start + pdata->tx_dma_offset;
1232 /* Unconditional dmaengine stuff */
1233 dma_data->addr = dma_params->dma_addr;
1235 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1237 dma_params->channel = res->start;
1239 dma_params->channel = pdata->tx_dma_channel;
1241 /* dmaengine filter data for DT and non-DT boot */
1242 if (pdev->dev.of_node)
1243 dma_data->filter_data = "tx";
1245 dma_data->filter_data = &dma_params->channel;
1247 dma_params = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1248 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1249 dma_params->asp_chan_q = pdata->asp_chan_q;
1250 dma_params->ram_chan_q = pdata->ram_chan_q;
1251 dma_params->sram_pool = pdata->sram_pool;
1252 dma_params->sram_size = pdata->sram_size_capture;
1254 dma_params->dma_addr = dat->start;
1256 dma_params->dma_addr = mem->start + pdata->rx_dma_offset;
1258 /* Unconditional dmaengine stuff */
1259 dma_data->addr = dma_params->dma_addr;
1261 if (mcasp->version < MCASP_VERSION_3) {
1262 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1263 /* dma_params->dma_addr is pointing to the data port address */
1264 mcasp->dat_port = true;
1266 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1269 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1271 dma_params->channel = res->start;
1273 dma_params->channel = pdata->rx_dma_channel;
1275 /* dmaengine filter data for DT and non-DT boot */
1276 if (pdev->dev.of_node)
1277 dma_data->filter_data = "rx";
1279 dma_data->filter_data = &dma_params->channel;
1281 dev_set_drvdata(&pdev->dev, mcasp);
1283 mcasp_reparent_fck(pdev);
1285 ret = devm_snd_soc_register_component(&pdev->dev,
1286 &davinci_mcasp_component,
1287 &davinci_mcasp_dai[pdata->op_mode], 1);
1292 switch (mcasp->version) {
1293 #if IS_BUILTIN(CONFIG_SND_DAVINCI_SOC) || \
1294 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1295 IS_MODULE(CONFIG_SND_DAVINCI_SOC))
1296 case MCASP_VERSION_1:
1297 case MCASP_VERSION_2:
1298 ret = davinci_soc_platform_register(&pdev->dev);
1301 #if IS_BUILTIN(CONFIG_SND_EDMA_SOC) || \
1302 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1303 IS_MODULE(CONFIG_SND_EDMA_SOC))
1304 case MCASP_VERSION_3:
1305 ret = edma_pcm_platform_register(&pdev->dev);
1308 #if IS_BUILTIN(CONFIG_SND_OMAP_SOC) || \
1309 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1310 IS_MODULE(CONFIG_SND_OMAP_SOC))
1311 case MCASP_VERSION_4:
1312 ret = omap_pcm_platform_register(&pdev->dev);
1316 dev_err(&pdev->dev, "Invalid McASP version: %d\n",
1323 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1330 pm_runtime_put_sync(&pdev->dev);
1331 pm_runtime_disable(&pdev->dev);
1335 static int davinci_mcasp_remove(struct platform_device *pdev)
1337 pm_runtime_put_sync(&pdev->dev);
1338 pm_runtime_disable(&pdev->dev);
1343 static struct platform_driver davinci_mcasp_driver = {
1344 .probe = davinci_mcasp_probe,
1345 .remove = davinci_mcasp_remove,
1347 .name = "davinci-mcasp",
1348 .owner = THIS_MODULE,
1349 .of_match_table = mcasp_dt_ids,
1353 module_platform_driver(davinci_mcasp_driver);
1355 MODULE_AUTHOR("Steve Chen");
1356 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1357 MODULE_LICENSE("GPL");