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/pm_runtime.h>
26 #include <linux/of_platform.h>
27 #include <linux/of_device.h>
29 #include <sound/core.h>
30 #include <sound/pcm.h>
31 #include <sound/pcm_params.h>
32 #include <sound/initval.h>
33 #include <sound/soc.h>
35 #include "davinci-pcm.h"
36 #include "davinci-mcasp.h"
38 struct davinci_mcasp {
39 struct davinci_pcm_dma_params dma_params[2];
44 /* McASP specific data */
53 /* McASP FIFO related */
59 #ifdef CONFIG_PM_SLEEP
72 static inline void mcasp_set_bits(void __iomem *reg, u32 val)
74 __raw_writel(__raw_readl(reg) | val, reg);
77 static inline void mcasp_clr_bits(void __iomem *reg, u32 val)
79 __raw_writel((__raw_readl(reg) & ~(val)), reg);
82 static inline void mcasp_mod_bits(void __iomem *reg, u32 val, u32 mask)
84 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
87 static inline void mcasp_set_reg(void __iomem *reg, u32 val)
89 __raw_writel(val, reg);
92 static inline u32 mcasp_get_reg(void __iomem *reg)
94 return (unsigned int)__raw_readl(reg);
97 static void mcasp_set_ctl_reg(void __iomem *regs, u32 val)
101 mcasp_set_bits(regs, val);
103 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
104 /* loop count is to avoid the lock-up */
105 for (i = 0; i < 1000; i++) {
106 if ((mcasp_get_reg(regs) & val) == val)
110 if (i == 1000 && ((mcasp_get_reg(regs) & val) != val))
111 printk(KERN_ERR "GBLCTL write error\n");
114 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
116 u32 rxfmctl = mcasp_get_reg(mcasp->base + DAVINCI_MCASP_RXFMCTL_REG);
117 u32 aclkxctl = mcasp_get_reg(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG);
119 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
122 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
124 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
125 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
128 * When ASYNC == 0 the transmit and receive sections operate
129 * synchronously from the transmit clock and frame sync. We need to make
130 * sure that the TX signlas are enabled when starting reception.
132 if (mcasp_is_synchronous(mcasp)) {
133 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG,
135 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG,
139 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
140 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXBUF_REG, 0);
142 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
143 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
144 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXBUF_REG, 0);
146 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
147 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
149 if (mcasp_is_synchronous(mcasp))
150 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG,
154 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
159 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
160 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
161 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
162 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXBUF_REG, 0);
164 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
165 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
166 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXBUF_REG, 0);
167 for (i = 0; i < mcasp->num_serializer; i++) {
168 if (mcasp->serial_dir[i] == TX_MODE) {
174 /* wait for TX ready */
176 while (!(mcasp_get_reg(mcasp->base + DAVINCI_MCASP_XRSRCTL_REG(offset)) &
177 TXSTATE) && (cnt < 100000))
180 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXBUF_REG, 0);
183 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
189 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
190 if (mcasp->txnumevt) { /* enable FIFO */
191 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
192 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
193 mcasp_set_bits(mcasp->base + reg, FIFO_ENABLE);
195 mcasp_start_tx(mcasp);
197 if (mcasp->rxnumevt) { /* enable FIFO */
198 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
199 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
200 mcasp_set_bits(mcasp->base + reg, FIFO_ENABLE);
202 mcasp_start_rx(mcasp);
206 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
209 * In synchronous mode stop the TX clocks if no other stream is
212 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
213 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, 0);
215 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, 0);
216 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
219 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
224 * In synchronous mode keep TX clocks running if the capture stream is
227 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
228 val = TXHCLKRST | TXCLKRST | TXFSRST;
230 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, val);
231 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
234 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
240 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
241 if (mcasp->txnumevt) { /* disable FIFO */
242 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
243 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
245 mcasp_stop_tx(mcasp);
247 if (mcasp->rxnumevt) { /* disable FIFO */
248 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
249 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
251 mcasp_stop_rx(mcasp);
255 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
258 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
259 void __iomem *base = mcasp->base;
261 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
262 case SND_SOC_DAIFMT_DSP_B:
263 case SND_SOC_DAIFMT_AC97:
264 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
265 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
268 /* configure a full-word SYNC pulse (LRCLK) */
269 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
270 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
272 /* make 1st data bit occur one ACLK cycle after the frame sync */
273 mcasp_set_bits(base + DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
274 mcasp_set_bits(base + DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
278 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
279 case SND_SOC_DAIFMT_CBS_CFS:
280 /* codec is clock and frame slave */
281 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
282 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
284 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
285 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
287 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
289 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
292 case SND_SOC_DAIFMT_CBM_CFS:
293 /* codec is clock master and frame slave */
294 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
295 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
297 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
298 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
300 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
302 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
305 case SND_SOC_DAIFMT_CBM_CFM:
306 /* codec is clock and frame master */
307 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
308 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
310 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
311 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
313 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
314 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
321 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
322 case SND_SOC_DAIFMT_IB_NF:
323 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
324 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
326 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
327 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
330 case SND_SOC_DAIFMT_NB_IF:
331 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
332 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
334 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
335 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
338 case SND_SOC_DAIFMT_IB_IF:
339 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
340 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
342 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
343 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
346 case SND_SOC_DAIFMT_NB_NF:
347 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
348 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
350 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
351 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
361 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
363 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
366 case 0: /* MCLK divider */
367 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG,
368 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
369 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_AHCLKRCTL_REG,
370 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
373 case 1: /* BCLK divider */
374 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG,
375 ACLKXDIV(div - 1), ACLKXDIV_MASK);
376 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_ACLKRCTL_REG,
377 ACLKRDIV(div - 1), ACLKRDIV_MASK);
380 case 2: /* BCLK/LRCLK ratio */
381 mcasp->bclk_lrclk_ratio = div;
391 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
392 unsigned int freq, int dir)
394 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
396 if (dir == SND_SOC_CLOCK_OUT) {
397 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
398 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
399 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
401 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
402 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
403 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
409 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
413 u32 tx_rotate = (word_length / 4) & 0x7;
414 u32 rx_rotate = (32 - word_length) / 4;
415 u32 mask = (1ULL << word_length) - 1;
418 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
419 * callback, take it into account here. That allows us to for example
420 * send 32 bits per channel to the codec, while only 16 of them carry
422 * The clock ratio is given for a full period of data (for I2S format
423 * both left and right channels), so it has to be divided by number of
424 * tdm-slots (for I2S - divided by 2).
426 if (mcasp->bclk_lrclk_ratio)
427 word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
429 /* mapping of the XSSZ bit-field as described in the datasheet */
430 fmt = (word_length >> 1) - 1;
432 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
433 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
434 RXSSZ(fmt), RXSSZ(0x0F));
435 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
436 TXSSZ(fmt), TXSSZ(0x0F));
437 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
438 TXROT(tx_rotate), TXROT(7));
439 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
440 RXROT(rx_rotate), RXROT(7));
441 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXMASK_REG,
445 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXMASK_REG, mask);
450 static int davinci_hw_common_param(struct davinci_mcasp *mcasp, int stream,
457 u8 slots = mcasp->tdm_slots;
458 u8 max_active_serializers = (channels + slots - 1) / slots;
460 /* Default configuration */
461 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
463 /* All PINS as McASP */
464 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_PFUNC_REG, 0x00000000);
466 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
467 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
468 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_XEVTCTL_REG,
471 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
472 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_REVTCTL_REG,
476 for (i = 0; i < mcasp->num_serializer; i++) {
477 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_XRSRCTL_REG(i),
478 mcasp->serial_dir[i]);
479 if (mcasp->serial_dir[i] == TX_MODE &&
480 tx_ser < max_active_serializers) {
481 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG,
484 } else if (mcasp->serial_dir[i] == RX_MODE &&
485 rx_ser < max_active_serializers) {
486 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG,
490 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_XRSRCTL_REG(i),
491 SRMOD_INACTIVE, SRMOD_MASK);
495 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
500 if (ser < max_active_serializers) {
501 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
502 "enabled in mcasp (%d)\n", channels, ser * slots);
506 if (mcasp->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
507 if (mcasp->txnumevt * tx_ser > 64)
510 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
511 mcasp_mod_bits(mcasp->base + reg, tx_ser, NUMDMA_MASK);
512 mcasp_mod_bits(mcasp->base + reg,
513 ((mcasp->txnumevt * tx_ser) << 8), NUMEVT_MASK);
516 if (mcasp->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
517 if (mcasp->rxnumevt * rx_ser > 64)
520 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
521 mcasp_mod_bits(mcasp->base + reg, rx_ser, NUMDMA_MASK);
522 mcasp_mod_bits(mcasp->base + reg,
523 ((mcasp->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
529 static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
535 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
536 for (i = 0; i < active_slots; i++)
539 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
541 if (!mcasp->dat_port)
544 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
545 /* bit stream is MSB first with no delay */
547 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXTDM_REG, mask);
548 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
551 if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
552 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMCTL_REG,
553 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
555 printk(KERN_ERR "playback tdm slot %d not supported\n",
558 /* bit stream is MSB first with no delay */
560 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
562 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXTDM_REG, mask);
564 if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
565 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RXFMCTL_REG,
566 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
568 printk(KERN_ERR "capture tdm slot %d not supported\n",
574 static void davinci_hw_dit_param(struct davinci_mcasp *mcasp)
576 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
578 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
579 TXROT(6) | TXSSZ(15));
581 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
582 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXFMCTL_REG,
583 AFSXE | FSXMOD(0x180));
585 /* Set the TX tdm : for all the slots */
586 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
588 /* Set the TX clock controls : div = 1 and internal */
589 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG,
592 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
594 /* Only 44100 and 48000 are valid, both have the same setting */
595 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
598 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
601 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
602 struct snd_pcm_hw_params *params,
603 struct snd_soc_dai *cpu_dai)
605 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
606 struct davinci_pcm_dma_params *dma_params =
607 &mcasp->dma_params[substream->stream];
610 u8 slots = mcasp->tdm_slots;
611 u8 active_serializers;
613 struct snd_interval *pcm_channels = hw_param_interval(params,
614 SNDRV_PCM_HW_PARAM_CHANNELS);
615 channels = pcm_channels->min;
617 active_serializers = (channels + slots - 1) / slots;
619 if (davinci_hw_common_param(mcasp, substream->stream, channels) == -EINVAL)
621 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
622 fifo_level = mcasp->txnumevt * active_serializers;
624 fifo_level = mcasp->rxnumevt * active_serializers;
626 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
627 davinci_hw_dit_param(mcasp);
629 davinci_hw_param(mcasp, substream->stream);
631 switch (params_format(params)) {
632 case SNDRV_PCM_FORMAT_U8:
633 case SNDRV_PCM_FORMAT_S8:
634 dma_params->data_type = 1;
638 case SNDRV_PCM_FORMAT_U16_LE:
639 case SNDRV_PCM_FORMAT_S16_LE:
640 dma_params->data_type = 2;
644 case SNDRV_PCM_FORMAT_U24_3LE:
645 case SNDRV_PCM_FORMAT_S24_3LE:
646 dma_params->data_type = 3;
650 case SNDRV_PCM_FORMAT_U24_LE:
651 case SNDRV_PCM_FORMAT_S24_LE:
652 case SNDRV_PCM_FORMAT_U32_LE:
653 case SNDRV_PCM_FORMAT_S32_LE:
654 dma_params->data_type = 4;
659 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
663 if (mcasp->version == MCASP_VERSION_2 && !fifo_level)
664 dma_params->acnt = 4;
666 dma_params->acnt = dma_params->data_type;
668 dma_params->fifo_level = fifo_level;
669 davinci_config_channel_size(mcasp, word_length);
674 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
675 int cmd, struct snd_soc_dai *cpu_dai)
677 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
681 case SNDRV_PCM_TRIGGER_RESUME:
682 case SNDRV_PCM_TRIGGER_START:
683 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
684 ret = pm_runtime_get_sync(mcasp->dev);
685 if (IS_ERR_VALUE(ret))
686 dev_err(mcasp->dev, "pm_runtime_get_sync() failed\n");
687 davinci_mcasp_start(mcasp, substream->stream);
690 case SNDRV_PCM_TRIGGER_SUSPEND:
691 davinci_mcasp_stop(mcasp, substream->stream);
692 ret = pm_runtime_put_sync(mcasp->dev);
693 if (IS_ERR_VALUE(ret))
694 dev_err(mcasp->dev, "pm_runtime_put_sync() failed\n");
697 case SNDRV_PCM_TRIGGER_STOP:
698 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
699 davinci_mcasp_stop(mcasp, substream->stream);
709 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
710 struct snd_soc_dai *dai)
712 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
714 snd_soc_dai_set_dma_data(dai, substream, mcasp->dma_params);
718 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
719 .startup = davinci_mcasp_startup,
720 .trigger = davinci_mcasp_trigger,
721 .hw_params = davinci_mcasp_hw_params,
722 .set_fmt = davinci_mcasp_set_dai_fmt,
723 .set_clkdiv = davinci_mcasp_set_clkdiv,
724 .set_sysclk = davinci_mcasp_set_sysclk,
727 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
729 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
730 SNDRV_PCM_FMTBIT_U8 | \
731 SNDRV_PCM_FMTBIT_S16_LE | \
732 SNDRV_PCM_FMTBIT_U16_LE | \
733 SNDRV_PCM_FMTBIT_S24_LE | \
734 SNDRV_PCM_FMTBIT_U24_LE | \
735 SNDRV_PCM_FMTBIT_S24_3LE | \
736 SNDRV_PCM_FMTBIT_U24_3LE | \
737 SNDRV_PCM_FMTBIT_S32_LE | \
738 SNDRV_PCM_FMTBIT_U32_LE)
740 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
742 .name = "davinci-mcasp.0",
745 .channels_max = 32 * 16,
746 .rates = DAVINCI_MCASP_RATES,
747 .formats = DAVINCI_MCASP_PCM_FMTS,
751 .channels_max = 32 * 16,
752 .rates = DAVINCI_MCASP_RATES,
753 .formats = DAVINCI_MCASP_PCM_FMTS,
755 .ops = &davinci_mcasp_dai_ops,
759 .name = "davinci-mcasp.1",
763 .rates = DAVINCI_MCASP_RATES,
764 .formats = DAVINCI_MCASP_PCM_FMTS,
766 .ops = &davinci_mcasp_dai_ops,
771 static const struct snd_soc_component_driver davinci_mcasp_component = {
772 .name = "davinci-mcasp",
775 /* Some HW specific values and defaults. The rest is filled in from DT. */
776 static struct snd_platform_data dm646x_mcasp_pdata = {
777 .tx_dma_offset = 0x400,
778 .rx_dma_offset = 0x400,
779 .asp_chan_q = EVENTQ_0,
780 .version = MCASP_VERSION_1,
783 static struct snd_platform_data da830_mcasp_pdata = {
784 .tx_dma_offset = 0x2000,
785 .rx_dma_offset = 0x2000,
786 .asp_chan_q = EVENTQ_0,
787 .version = MCASP_VERSION_2,
790 static struct snd_platform_data omap2_mcasp_pdata = {
793 .asp_chan_q = EVENTQ_0,
794 .version = MCASP_VERSION_3,
797 static const struct of_device_id mcasp_dt_ids[] = {
799 .compatible = "ti,dm646x-mcasp-audio",
800 .data = &dm646x_mcasp_pdata,
803 .compatible = "ti,da830-mcasp-audio",
804 .data = &da830_mcasp_pdata,
807 .compatible = "ti,am33xx-mcasp-audio",
808 .data = &omap2_mcasp_pdata,
812 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
814 static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
815 struct platform_device *pdev)
817 struct device_node *np = pdev->dev.of_node;
818 struct snd_platform_data *pdata = NULL;
819 const struct of_device_id *match =
820 of_match_device(mcasp_dt_ids, &pdev->dev);
821 struct of_phandle_args dma_spec;
823 const u32 *of_serial_dir32;
827 if (pdev->dev.platform_data) {
828 pdata = pdev->dev.platform_data;
831 pdata = (struct snd_platform_data *) match->data;
833 /* control shouldn't reach here. something is wrong */
838 ret = of_property_read_u32(np, "op-mode", &val);
840 pdata->op_mode = val;
842 ret = of_property_read_u32(np, "tdm-slots", &val);
844 if (val < 2 || val > 32) {
846 "tdm-slots must be in rage [2-32]\n");
851 pdata->tdm_slots = val;
854 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
856 if (of_serial_dir32) {
857 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
858 (sizeof(*of_serial_dir) * val),
860 if (!of_serial_dir) {
865 for (i = 0; i < val; i++)
866 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
868 pdata->num_serializer = val;
869 pdata->serial_dir = of_serial_dir;
872 ret = of_property_match_string(np, "dma-names", "tx");
876 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
881 pdata->tx_dma_channel = dma_spec.args[0];
883 ret = of_property_match_string(np, "dma-names", "rx");
887 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
892 pdata->rx_dma_channel = dma_spec.args[0];
894 ret = of_property_read_u32(np, "tx-num-evt", &val);
896 pdata->txnumevt = val;
898 ret = of_property_read_u32(np, "rx-num-evt", &val);
900 pdata->rxnumevt = val;
902 ret = of_property_read_u32(np, "sram-size-playback", &val);
904 pdata->sram_size_playback = val;
906 ret = of_property_read_u32(np, "sram-size-capture", &val);
908 pdata->sram_size_capture = val;
914 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
921 static int davinci_mcasp_probe(struct platform_device *pdev)
923 struct davinci_pcm_dma_params *dma_data;
924 struct resource *mem, *ioarea, *res, *dat;
925 struct snd_platform_data *pdata;
926 struct davinci_mcasp *mcasp;
929 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
930 dev_err(&pdev->dev, "No platform data supplied\n");
934 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
939 pdata = davinci_mcasp_set_pdata_from_of(pdev);
941 dev_err(&pdev->dev, "no platform data\n");
945 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
948 "\"mpu\" mem resource not found, using index 0\n");
949 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
951 dev_err(&pdev->dev, "no mem resource?\n");
956 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
957 resource_size(mem), pdev->name);
959 dev_err(&pdev->dev, "Audio region already claimed\n");
963 pm_runtime_enable(&pdev->dev);
965 ret = pm_runtime_get_sync(&pdev->dev);
966 if (IS_ERR_VALUE(ret)) {
967 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
971 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
973 dev_err(&pdev->dev, "ioremap failed\n");
975 goto err_release_clk;
978 mcasp->op_mode = pdata->op_mode;
979 mcasp->tdm_slots = pdata->tdm_slots;
980 mcasp->num_serializer = pdata->num_serializer;
981 mcasp->serial_dir = pdata->serial_dir;
982 mcasp->version = pdata->version;
983 mcasp->txnumevt = pdata->txnumevt;
984 mcasp->rxnumevt = pdata->rxnumevt;
986 mcasp->dev = &pdev->dev;
988 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
990 mcasp->dat_port = true;
992 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
993 dma_data->asp_chan_q = pdata->asp_chan_q;
994 dma_data->ram_chan_q = pdata->ram_chan_q;
995 dma_data->sram_pool = pdata->sram_pool;
996 dma_data->sram_size = pdata->sram_size_playback;
998 dma_data->dma_addr = dat->start;
1000 dma_data->dma_addr = mem->start + pdata->tx_dma_offset;
1002 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1004 dma_data->channel = res->start;
1006 dma_data->channel = pdata->tx_dma_channel;
1008 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1009 dma_data->asp_chan_q = pdata->asp_chan_q;
1010 dma_data->ram_chan_q = pdata->ram_chan_q;
1011 dma_data->sram_pool = pdata->sram_pool;
1012 dma_data->sram_size = pdata->sram_size_capture;
1014 dma_data->dma_addr = dat->start;
1016 dma_data->dma_addr = mem->start + pdata->rx_dma_offset;
1018 if (mcasp->version < MCASP_VERSION_3) {
1019 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1020 /* dma_data->dma_addr is pointing to the data port address */
1021 mcasp->dat_port = true;
1023 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1026 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1028 dma_data->channel = res->start;
1030 dma_data->channel = pdata->rx_dma_channel;
1032 dev_set_drvdata(&pdev->dev, mcasp);
1033 ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
1034 &davinci_mcasp_dai[pdata->op_mode], 1);
1037 goto err_release_clk;
1039 ret = davinci_soc_platform_register(&pdev->dev);
1041 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1042 goto err_unregister_component;
1047 err_unregister_component:
1048 snd_soc_unregister_component(&pdev->dev);
1050 pm_runtime_put_sync(&pdev->dev);
1051 pm_runtime_disable(&pdev->dev);
1055 static int davinci_mcasp_remove(struct platform_device *pdev)
1058 snd_soc_unregister_component(&pdev->dev);
1059 davinci_soc_platform_unregister(&pdev->dev);
1061 pm_runtime_put_sync(&pdev->dev);
1062 pm_runtime_disable(&pdev->dev);
1067 #ifdef CONFIG_PM_SLEEP
1068 static int davinci_mcasp_suspend(struct device *dev)
1070 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1071 void __iomem *base = mcasp->base;
1073 mcasp->context.txfmtctl = mcasp_get_reg(base + DAVINCI_MCASP_TXFMCTL_REG);
1074 mcasp->context.rxfmtctl = mcasp_get_reg(base + DAVINCI_MCASP_RXFMCTL_REG);
1075 mcasp->context.txfmt = mcasp_get_reg(base + DAVINCI_MCASP_TXFMT_REG);
1076 mcasp->context.rxfmt = mcasp_get_reg(base + DAVINCI_MCASP_RXFMT_REG);
1077 mcasp->context.aclkxctl = mcasp_get_reg(base + DAVINCI_MCASP_ACLKXCTL_REG);
1078 mcasp->context.aclkrctl = mcasp_get_reg(base + DAVINCI_MCASP_ACLKRCTL_REG);
1079 mcasp->context.pdir = mcasp_get_reg(base + DAVINCI_MCASP_PDIR_REG);
1084 static int davinci_mcasp_resume(struct device *dev)
1086 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1087 void __iomem *base = mcasp->base;
1089 mcasp_set_reg(base + DAVINCI_MCASP_TXFMCTL_REG, mcasp->context.txfmtctl);
1090 mcasp_set_reg(base + DAVINCI_MCASP_RXFMCTL_REG, mcasp->context.rxfmtctl);
1091 mcasp_set_reg(base + DAVINCI_MCASP_TXFMT_REG, mcasp->context.txfmt);
1092 mcasp_set_reg(base + DAVINCI_MCASP_RXFMT_REG, mcasp->context.rxfmt);
1093 mcasp_set_reg(base + DAVINCI_MCASP_ACLKXCTL_REG, mcasp->context.aclkxctl);
1094 mcasp_set_reg(base + DAVINCI_MCASP_ACLKRCTL_REG, mcasp->context.aclkrctl);
1095 mcasp_set_reg(base + DAVINCI_MCASP_PDIR_REG, mcasp->context.pdir);
1101 SIMPLE_DEV_PM_OPS(davinci_mcasp_pm_ops,
1102 davinci_mcasp_suspend,
1103 davinci_mcasp_resume);
1105 static struct platform_driver davinci_mcasp_driver = {
1106 .probe = davinci_mcasp_probe,
1107 .remove = davinci_mcasp_remove,
1109 .name = "davinci-mcasp",
1110 .owner = THIS_MODULE,
1111 .pm = &davinci_mcasp_pm_ops,
1112 .of_match_table = mcasp_dt_ids,
1116 module_platform_driver(davinci_mcasp_driver);
1118 MODULE_AUTHOR("Steve Chen");
1119 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1120 MODULE_LICENSE("GPL");