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>
34 #include <sound/dmaengine_pcm.h>
36 #include "davinci-pcm.h"
37 #include "davinci-mcasp.h"
39 struct davinci_mcasp {
40 struct davinci_pcm_dma_params dma_params[2];
41 struct snd_dmaengine_dai_dma_data dma_data[2];
46 /* McASP specific data */
55 /* McASP FIFO related */
61 #ifdef CONFIG_PM_SLEEP
74 static inline void mcasp_set_bits(void __iomem *reg, u32 val)
76 __raw_writel(__raw_readl(reg) | val, reg);
79 static inline void mcasp_clr_bits(void __iomem *reg, u32 val)
81 __raw_writel((__raw_readl(reg) & ~(val)), reg);
84 static inline void mcasp_mod_bits(void __iomem *reg, u32 val, u32 mask)
86 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
89 static inline void mcasp_set_reg(void __iomem *reg, u32 val)
91 __raw_writel(val, reg);
94 static inline u32 mcasp_get_reg(void __iomem *reg)
96 return (unsigned int)__raw_readl(reg);
99 static void mcasp_set_ctl_reg(void __iomem *regs, u32 val)
103 mcasp_set_bits(regs, val);
105 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
106 /* loop count is to avoid the lock-up */
107 for (i = 0; i < 1000; i++) {
108 if ((mcasp_get_reg(regs) & val) == val)
112 if (i == 1000 && ((mcasp_get_reg(regs) & val) != val))
113 printk(KERN_ERR "GBLCTL write error\n");
116 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
118 u32 rxfmctl = mcasp_get_reg(mcasp->base + DAVINCI_MCASP_RXFMCTL_REG);
119 u32 aclkxctl = mcasp_get_reg(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG);
121 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
124 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
126 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
127 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
130 * When ASYNC == 0 the transmit and receive sections operate
131 * synchronously from the transmit clock and frame sync. We need to make
132 * sure that the TX signlas are enabled when starting reception.
134 if (mcasp_is_synchronous(mcasp)) {
135 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG,
137 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG,
141 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
142 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXBUF_REG, 0);
144 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
145 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
146 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXBUF_REG, 0);
148 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
149 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
151 if (mcasp_is_synchronous(mcasp))
152 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG,
156 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
161 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
162 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
163 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
164 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXBUF_REG, 0);
166 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
167 mcasp_set_ctl_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
168 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXBUF_REG, 0);
169 for (i = 0; i < mcasp->num_serializer; i++) {
170 if (mcasp->serial_dir[i] == TX_MODE) {
176 /* wait for TX ready */
178 while (!(mcasp_get_reg(mcasp->base + DAVINCI_MCASP_XRSRCTL_REG(offset)) &
179 TXSTATE) && (cnt < 100000))
182 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXBUF_REG, 0);
185 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
191 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
192 if (mcasp->txnumevt) { /* enable FIFO */
193 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
194 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
195 mcasp_set_bits(mcasp->base + reg, FIFO_ENABLE);
197 mcasp_start_tx(mcasp);
199 if (mcasp->rxnumevt) { /* enable FIFO */
200 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
201 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
202 mcasp_set_bits(mcasp->base + reg, FIFO_ENABLE);
204 mcasp_start_rx(mcasp);
208 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
211 * In synchronous mode stop the TX clocks if no other stream is
214 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
215 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, 0);
217 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_GBLCTLR_REG, 0);
218 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
221 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
226 * In synchronous mode keep TX clocks running if the capture stream is
229 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
230 val = TXHCLKRST | TXCLKRST | TXFSRST;
232 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_GBLCTLX_REG, val);
233 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
236 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
242 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
243 if (mcasp->txnumevt) { /* disable FIFO */
244 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
245 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
247 mcasp_stop_tx(mcasp);
249 if (mcasp->rxnumevt) { /* disable FIFO */
250 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
251 mcasp_clr_bits(mcasp->base + reg, FIFO_ENABLE);
253 mcasp_stop_rx(mcasp);
257 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
260 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
261 void __iomem *base = mcasp->base;
263 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
264 case SND_SOC_DAIFMT_DSP_B:
265 case SND_SOC_DAIFMT_AC97:
266 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
267 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
270 /* configure a full-word SYNC pulse (LRCLK) */
271 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
272 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
274 /* make 1st data bit occur one ACLK cycle after the frame sync */
275 mcasp_set_bits(base + DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
276 mcasp_set_bits(base + DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
280 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
281 case SND_SOC_DAIFMT_CBS_CFS:
282 /* codec is clock and frame slave */
283 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
284 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
286 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
287 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
289 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
291 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
294 case SND_SOC_DAIFMT_CBM_CFS:
295 /* codec is clock master and frame slave */
296 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
297 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
299 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
300 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
302 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
304 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
307 case SND_SOC_DAIFMT_CBM_CFM:
308 /* codec is clock and frame master */
309 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
310 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
312 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
313 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
315 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
316 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
323 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
324 case SND_SOC_DAIFMT_IB_NF:
325 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
326 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
328 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
329 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
332 case SND_SOC_DAIFMT_NB_IF:
333 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
334 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
336 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
337 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
340 case SND_SOC_DAIFMT_IB_IF:
341 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
342 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
344 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
345 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
348 case SND_SOC_DAIFMT_NB_NF:
349 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
350 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
352 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
353 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
363 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
365 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
368 case 0: /* MCLK divider */
369 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG,
370 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
371 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_AHCLKRCTL_REG,
372 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
375 case 1: /* BCLK divider */
376 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG,
377 ACLKXDIV(div - 1), ACLKXDIV_MASK);
378 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_ACLKRCTL_REG,
379 ACLKRDIV(div - 1), ACLKRDIV_MASK);
382 case 2: /* BCLK/LRCLK ratio */
383 mcasp->bclk_lrclk_ratio = div;
393 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
394 unsigned int freq, int dir)
396 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
398 if (dir == SND_SOC_CLOCK_OUT) {
399 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
400 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
401 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
403 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
404 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
405 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
411 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
415 u32 tx_rotate = (word_length / 4) & 0x7;
416 u32 rx_rotate = (32 - word_length) / 4;
417 u32 mask = (1ULL << word_length) - 1;
420 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
421 * callback, take it into account here. That allows us to for example
422 * send 32 bits per channel to the codec, while only 16 of them carry
424 * The clock ratio is given for a full period of data (for I2S format
425 * both left and right channels), so it has to be divided by number of
426 * tdm-slots (for I2S - divided by 2).
428 if (mcasp->bclk_lrclk_ratio)
429 word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
431 /* mapping of the XSSZ bit-field as described in the datasheet */
432 fmt = (word_length >> 1) - 1;
434 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
435 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
436 RXSSZ(fmt), RXSSZ(0x0F));
437 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
438 TXSSZ(fmt), TXSSZ(0x0F));
439 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
440 TXROT(tx_rotate), TXROT(7));
441 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
442 RXROT(rx_rotate), RXROT(7));
443 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXMASK_REG,
447 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXMASK_REG, mask);
452 static int davinci_hw_common_param(struct davinci_mcasp *mcasp, int stream,
459 u8 slots = mcasp->tdm_slots;
460 u8 max_active_serializers = (channels + slots - 1) / slots;
462 /* Default configuration */
463 if (mcasp->version != MCASP_VERSION_4)
464 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PWREMUMGT_REG,
467 /* All PINS as McASP */
468 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_PFUNC_REG, 0x00000000);
470 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
471 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
472 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_XEVTCTL_REG,
475 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
476 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_REVTCTL_REG,
480 for (i = 0; i < mcasp->num_serializer; i++) {
481 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_XRSRCTL_REG(i),
482 mcasp->serial_dir[i]);
483 if (mcasp->serial_dir[i] == TX_MODE &&
484 tx_ser < max_active_serializers) {
485 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG,
488 } else if (mcasp->serial_dir[i] == RX_MODE &&
489 rx_ser < max_active_serializers) {
490 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_PDIR_REG,
494 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_XRSRCTL_REG(i),
495 SRMOD_INACTIVE, SRMOD_MASK);
499 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
504 if (ser < max_active_serializers) {
505 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
506 "enabled in mcasp (%d)\n", channels, ser * slots);
510 if (mcasp->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
511 if (mcasp->txnumevt * tx_ser > 64)
514 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
515 mcasp_mod_bits(mcasp->base + reg, tx_ser, NUMDMA_MASK);
516 mcasp_mod_bits(mcasp->base + reg,
517 ((mcasp->txnumevt * tx_ser) << 8), NUMEVT_MASK);
520 if (mcasp->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
521 if (mcasp->rxnumevt * rx_ser > 64)
524 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
525 mcasp_mod_bits(mcasp->base + reg, rx_ser, NUMDMA_MASK);
526 mcasp_mod_bits(mcasp->base + reg,
527 ((mcasp->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
533 static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
539 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
540 for (i = 0; i < active_slots; i++)
543 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
545 if (!mcasp->dat_port)
548 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
549 /* bit stream is MSB first with no delay */
551 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXTDM_REG, mask);
552 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
555 if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
556 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_TXFMCTL_REG,
557 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
559 printk(KERN_ERR "playback tdm slot %d not supported\n",
562 /* bit stream is MSB first with no delay */
564 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_RXFMT_REG,
566 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_RXTDM_REG, mask);
568 if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
569 mcasp_mod_bits(mcasp->base + DAVINCI_MCASP_RXFMCTL_REG,
570 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
572 printk(KERN_ERR "capture tdm slot %d not supported\n",
578 static void davinci_hw_dit_param(struct davinci_mcasp *mcasp)
580 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
582 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXFMT_REG,
583 TXROT(6) | TXSSZ(15));
585 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
586 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXFMCTL_REG,
587 AFSXE | FSXMOD(0x180));
589 /* Set the TX tdm : for all the slots */
590 mcasp_set_reg(mcasp->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
592 /* Set the TX clock controls : div = 1 and internal */
593 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_ACLKXCTL_REG,
596 mcasp_clr_bits(mcasp->base + DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
598 /* Only 44100 and 48000 are valid, both have the same setting */
599 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
602 mcasp_set_bits(mcasp->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
605 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
606 struct snd_pcm_hw_params *params,
607 struct snd_soc_dai *cpu_dai)
609 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
610 struct davinci_pcm_dma_params *dma_params =
611 &mcasp->dma_params[substream->stream];
612 struct snd_dmaengine_dai_dma_data *dma_data =
613 &mcasp->dma_data[substream->stream];
616 u8 slots = mcasp->tdm_slots;
617 u8 active_serializers;
619 struct snd_interval *pcm_channels = hw_param_interval(params,
620 SNDRV_PCM_HW_PARAM_CHANNELS);
621 channels = pcm_channels->min;
623 active_serializers = (channels + slots - 1) / slots;
625 if (davinci_hw_common_param(mcasp, substream->stream, channels) == -EINVAL)
627 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
628 fifo_level = mcasp->txnumevt * active_serializers;
630 fifo_level = mcasp->rxnumevt * active_serializers;
632 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
633 davinci_hw_dit_param(mcasp);
635 davinci_hw_param(mcasp, substream->stream);
637 switch (params_format(params)) {
638 case SNDRV_PCM_FORMAT_U8:
639 case SNDRV_PCM_FORMAT_S8:
640 dma_params->data_type = 1;
644 case SNDRV_PCM_FORMAT_U16_LE:
645 case SNDRV_PCM_FORMAT_S16_LE:
646 dma_params->data_type = 2;
650 case SNDRV_PCM_FORMAT_U24_3LE:
651 case SNDRV_PCM_FORMAT_S24_3LE:
652 dma_params->data_type = 3;
656 case SNDRV_PCM_FORMAT_U24_LE:
657 case SNDRV_PCM_FORMAT_S24_LE:
658 case SNDRV_PCM_FORMAT_U32_LE:
659 case SNDRV_PCM_FORMAT_S32_LE:
660 dma_params->data_type = 4;
665 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
669 if (mcasp->version == MCASP_VERSION_2 && !fifo_level)
670 dma_params->acnt = 4;
672 dma_params->acnt = dma_params->data_type;
674 dma_params->fifo_level = fifo_level;
675 dma_data->maxburst = fifo_level;
677 davinci_config_channel_size(mcasp, word_length);
682 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
683 int cmd, struct snd_soc_dai *cpu_dai)
685 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
689 case SNDRV_PCM_TRIGGER_RESUME:
690 case SNDRV_PCM_TRIGGER_START:
691 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
692 ret = pm_runtime_get_sync(mcasp->dev);
693 if (IS_ERR_VALUE(ret))
694 dev_err(mcasp->dev, "pm_runtime_get_sync() failed\n");
695 davinci_mcasp_start(mcasp, substream->stream);
698 case SNDRV_PCM_TRIGGER_SUSPEND:
699 davinci_mcasp_stop(mcasp, substream->stream);
700 ret = pm_runtime_put_sync(mcasp->dev);
701 if (IS_ERR_VALUE(ret))
702 dev_err(mcasp->dev, "pm_runtime_put_sync() failed\n");
705 case SNDRV_PCM_TRIGGER_STOP:
706 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
707 davinci_mcasp_stop(mcasp, substream->stream);
717 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
718 struct snd_soc_dai *dai)
720 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
722 if (mcasp->version == MCASP_VERSION_4)
723 snd_soc_dai_set_dma_data(dai, substream,
724 &mcasp->dma_data[substream->stream]);
726 snd_soc_dai_set_dma_data(dai, substream, mcasp->dma_params);
731 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
732 .startup = davinci_mcasp_startup,
733 .trigger = davinci_mcasp_trigger,
734 .hw_params = davinci_mcasp_hw_params,
735 .set_fmt = davinci_mcasp_set_dai_fmt,
736 .set_clkdiv = davinci_mcasp_set_clkdiv,
737 .set_sysclk = davinci_mcasp_set_sysclk,
740 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
742 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
743 SNDRV_PCM_FMTBIT_U8 | \
744 SNDRV_PCM_FMTBIT_S16_LE | \
745 SNDRV_PCM_FMTBIT_U16_LE | \
746 SNDRV_PCM_FMTBIT_S24_LE | \
747 SNDRV_PCM_FMTBIT_U24_LE | \
748 SNDRV_PCM_FMTBIT_S24_3LE | \
749 SNDRV_PCM_FMTBIT_U24_3LE | \
750 SNDRV_PCM_FMTBIT_S32_LE | \
751 SNDRV_PCM_FMTBIT_U32_LE)
753 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
755 .name = "davinci-mcasp.0",
758 .channels_max = 32 * 16,
759 .rates = DAVINCI_MCASP_RATES,
760 .formats = DAVINCI_MCASP_PCM_FMTS,
764 .channels_max = 32 * 16,
765 .rates = DAVINCI_MCASP_RATES,
766 .formats = DAVINCI_MCASP_PCM_FMTS,
768 .ops = &davinci_mcasp_dai_ops,
772 .name = "davinci-mcasp.1",
776 .rates = DAVINCI_MCASP_RATES,
777 .formats = DAVINCI_MCASP_PCM_FMTS,
779 .ops = &davinci_mcasp_dai_ops,
784 static const struct snd_soc_component_driver davinci_mcasp_component = {
785 .name = "davinci-mcasp",
788 /* Some HW specific values and defaults. The rest is filled in from DT. */
789 static struct snd_platform_data dm646x_mcasp_pdata = {
790 .tx_dma_offset = 0x400,
791 .rx_dma_offset = 0x400,
792 .asp_chan_q = EVENTQ_0,
793 .version = MCASP_VERSION_1,
796 static struct snd_platform_data da830_mcasp_pdata = {
797 .tx_dma_offset = 0x2000,
798 .rx_dma_offset = 0x2000,
799 .asp_chan_q = EVENTQ_0,
800 .version = MCASP_VERSION_2,
803 static struct snd_platform_data omap2_mcasp_pdata = {
806 .asp_chan_q = EVENTQ_0,
807 .version = MCASP_VERSION_3,
810 static struct snd_platform_data dra7_mcasp_pdata = {
811 .tx_dma_offset = 0x200,
812 .rx_dma_offset = 0x284,
813 .asp_chan_q = EVENTQ_0,
814 .version = MCASP_VERSION_4,
817 static const struct of_device_id mcasp_dt_ids[] = {
819 .compatible = "ti,dm646x-mcasp-audio",
820 .data = &dm646x_mcasp_pdata,
823 .compatible = "ti,da830-mcasp-audio",
824 .data = &da830_mcasp_pdata,
827 .compatible = "ti,am33xx-mcasp-audio",
828 .data = &omap2_mcasp_pdata,
831 .compatible = "ti,dra7-mcasp-audio",
832 .data = &dra7_mcasp_pdata,
836 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
838 static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
839 struct platform_device *pdev)
841 struct device_node *np = pdev->dev.of_node;
842 struct snd_platform_data *pdata = NULL;
843 const struct of_device_id *match =
844 of_match_device(mcasp_dt_ids, &pdev->dev);
845 struct of_phandle_args dma_spec;
847 const u32 *of_serial_dir32;
851 if (pdev->dev.platform_data) {
852 pdata = pdev->dev.platform_data;
855 pdata = (struct snd_platform_data *) match->data;
857 /* control shouldn't reach here. something is wrong */
862 ret = of_property_read_u32(np, "op-mode", &val);
864 pdata->op_mode = val;
866 ret = of_property_read_u32(np, "tdm-slots", &val);
868 if (val < 2 || val > 32) {
870 "tdm-slots must be in rage [2-32]\n");
875 pdata->tdm_slots = val;
878 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
880 if (of_serial_dir32) {
881 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
882 (sizeof(*of_serial_dir) * val),
884 if (!of_serial_dir) {
889 for (i = 0; i < val; i++)
890 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
892 pdata->num_serializer = val;
893 pdata->serial_dir = of_serial_dir;
896 ret = of_property_match_string(np, "dma-names", "tx");
900 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
905 pdata->tx_dma_channel = dma_spec.args[0];
907 ret = of_property_match_string(np, "dma-names", "rx");
911 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
916 pdata->rx_dma_channel = dma_spec.args[0];
918 ret = of_property_read_u32(np, "tx-num-evt", &val);
920 pdata->txnumevt = val;
922 ret = of_property_read_u32(np, "rx-num-evt", &val);
924 pdata->rxnumevt = val;
926 ret = of_property_read_u32(np, "sram-size-playback", &val);
928 pdata->sram_size_playback = val;
930 ret = of_property_read_u32(np, "sram-size-capture", &val);
932 pdata->sram_size_capture = val;
938 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
945 static int davinci_mcasp_probe(struct platform_device *pdev)
947 struct davinci_pcm_dma_params *dma_data;
948 struct resource *mem, *ioarea, *res, *dat;
949 struct snd_platform_data *pdata;
950 struct davinci_mcasp *mcasp;
953 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
954 dev_err(&pdev->dev, "No platform data supplied\n");
958 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
963 pdata = davinci_mcasp_set_pdata_from_of(pdev);
965 dev_err(&pdev->dev, "no platform data\n");
969 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
972 "\"mpu\" mem resource not found, using index 0\n");
973 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
975 dev_err(&pdev->dev, "no mem resource?\n");
980 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
981 resource_size(mem), pdev->name);
983 dev_err(&pdev->dev, "Audio region already claimed\n");
987 pm_runtime_enable(&pdev->dev);
989 ret = pm_runtime_get_sync(&pdev->dev);
990 if (IS_ERR_VALUE(ret)) {
991 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
995 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
997 dev_err(&pdev->dev, "ioremap failed\n");
999 goto err_release_clk;
1002 mcasp->op_mode = pdata->op_mode;
1003 mcasp->tdm_slots = pdata->tdm_slots;
1004 mcasp->num_serializer = pdata->num_serializer;
1005 mcasp->serial_dir = pdata->serial_dir;
1006 mcasp->version = pdata->version;
1007 mcasp->txnumevt = pdata->txnumevt;
1008 mcasp->rxnumevt = pdata->rxnumevt;
1010 mcasp->dev = &pdev->dev;
1012 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1014 mcasp->dat_port = true;
1016 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1017 dma_data->asp_chan_q = pdata->asp_chan_q;
1018 dma_data->ram_chan_q = pdata->ram_chan_q;
1019 dma_data->sram_pool = pdata->sram_pool;
1020 dma_data->sram_size = pdata->sram_size_playback;
1022 dma_data->dma_addr = dat->start;
1024 dma_data->dma_addr = mem->start + pdata->tx_dma_offset;
1026 /* Unconditional dmaengine stuff */
1027 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr = dma_data->dma_addr;
1029 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1031 dma_data->channel = res->start;
1033 dma_data->channel = pdata->tx_dma_channel;
1035 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1036 dma_data->asp_chan_q = pdata->asp_chan_q;
1037 dma_data->ram_chan_q = pdata->ram_chan_q;
1038 dma_data->sram_pool = pdata->sram_pool;
1039 dma_data->sram_size = pdata->sram_size_capture;
1041 dma_data->dma_addr = dat->start;
1043 dma_data->dma_addr = mem->start + pdata->rx_dma_offset;
1045 /* Unconditional dmaengine stuff */
1046 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr = dma_data->dma_addr;
1048 if (mcasp->version < MCASP_VERSION_3) {
1049 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1050 /* dma_data->dma_addr is pointing to the data port address */
1051 mcasp->dat_port = true;
1053 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1056 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1058 dma_data->channel = res->start;
1060 dma_data->channel = pdata->rx_dma_channel;
1062 /* Unconditional dmaengine stuff */
1063 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = "tx";
1064 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = "rx";
1066 dev_set_drvdata(&pdev->dev, mcasp);
1067 ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
1068 &davinci_mcasp_dai[pdata->op_mode], 1);
1071 goto err_release_clk;
1073 if (mcasp->version != MCASP_VERSION_4) {
1074 ret = davinci_soc_platform_register(&pdev->dev);
1076 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1077 goto err_unregister_component;
1083 err_unregister_component:
1084 snd_soc_unregister_component(&pdev->dev);
1086 pm_runtime_put_sync(&pdev->dev);
1087 pm_runtime_disable(&pdev->dev);
1091 static int davinci_mcasp_remove(struct platform_device *pdev)
1093 struct davinci_mcasp *mcasp = dev_get_drvdata(&pdev->dev);
1095 snd_soc_unregister_component(&pdev->dev);
1096 if (mcasp->version != MCASP_VERSION_4)
1097 davinci_soc_platform_unregister(&pdev->dev);
1099 pm_runtime_put_sync(&pdev->dev);
1100 pm_runtime_disable(&pdev->dev);
1105 #ifdef CONFIG_PM_SLEEP
1106 static int davinci_mcasp_suspend(struct device *dev)
1108 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1109 void __iomem *base = mcasp->base;
1111 mcasp->context.txfmtctl = mcasp_get_reg(base + DAVINCI_MCASP_TXFMCTL_REG);
1112 mcasp->context.rxfmtctl = mcasp_get_reg(base + DAVINCI_MCASP_RXFMCTL_REG);
1113 mcasp->context.txfmt = mcasp_get_reg(base + DAVINCI_MCASP_TXFMT_REG);
1114 mcasp->context.rxfmt = mcasp_get_reg(base + DAVINCI_MCASP_RXFMT_REG);
1115 mcasp->context.aclkxctl = mcasp_get_reg(base + DAVINCI_MCASP_ACLKXCTL_REG);
1116 mcasp->context.aclkrctl = mcasp_get_reg(base + DAVINCI_MCASP_ACLKRCTL_REG);
1117 mcasp->context.pdir = mcasp_get_reg(base + DAVINCI_MCASP_PDIR_REG);
1122 static int davinci_mcasp_resume(struct device *dev)
1124 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1125 void __iomem *base = mcasp->base;
1127 mcasp_set_reg(base + DAVINCI_MCASP_TXFMCTL_REG, mcasp->context.txfmtctl);
1128 mcasp_set_reg(base + DAVINCI_MCASP_RXFMCTL_REG, mcasp->context.rxfmtctl);
1129 mcasp_set_reg(base + DAVINCI_MCASP_TXFMT_REG, mcasp->context.txfmt);
1130 mcasp_set_reg(base + DAVINCI_MCASP_RXFMT_REG, mcasp->context.rxfmt);
1131 mcasp_set_reg(base + DAVINCI_MCASP_ACLKXCTL_REG, mcasp->context.aclkxctl);
1132 mcasp_set_reg(base + DAVINCI_MCASP_ACLKRCTL_REG, mcasp->context.aclkrctl);
1133 mcasp_set_reg(base + DAVINCI_MCASP_PDIR_REG, mcasp->context.pdir);
1139 SIMPLE_DEV_PM_OPS(davinci_mcasp_pm_ops,
1140 davinci_mcasp_suspend,
1141 davinci_mcasp_resume);
1143 static struct platform_driver davinci_mcasp_driver = {
1144 .probe = davinci_mcasp_probe,
1145 .remove = davinci_mcasp_remove,
1147 .name = "davinci-mcasp",
1148 .owner = THIS_MODULE,
1149 .pm = &davinci_mcasp_pm_ops,
1150 .of_match_table = mcasp_dt_ids,
1154 module_platform_driver(davinci_mcasp_driver);
1156 MODULE_AUTHOR("Steve Chen");
1157 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1158 MODULE_LICENSE("GPL");