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(struct davinci_mcasp *mcasp, u32 offset,
77 void __iomem *reg = mcasp->base + offset;
78 __raw_writel(__raw_readl(reg) | val, reg);
81 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
84 void __iomem *reg = mcasp->base + offset;
85 __raw_writel((__raw_readl(reg) & ~(val)), reg);
88 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
91 void __iomem *reg = mcasp->base + offset;
92 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
95 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
98 __raw_writel(val, mcasp->base + offset);
101 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
103 return (u32)__raw_readl(mcasp->base + offset);
106 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
110 mcasp_set_bits(mcasp, ctl_reg, val);
112 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
113 /* loop count is to avoid the lock-up */
114 for (i = 0; i < 1000; i++) {
115 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
119 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
120 printk(KERN_ERR "GBLCTL write error\n");
123 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
125 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
126 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
128 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
131 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
133 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
134 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
137 * When ASYNC == 0 the transmit and receive sections operate
138 * synchronously from the transmit clock and frame sync. We need to make
139 * sure that the TX signlas are enabled when starting reception.
141 if (mcasp_is_synchronous(mcasp)) {
142 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
143 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
146 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
147 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
149 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
150 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
151 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
153 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
154 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
156 if (mcasp_is_synchronous(mcasp))
157 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
160 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
165 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
166 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
167 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
168 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
170 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
171 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
172 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
173 for (i = 0; i < mcasp->num_serializer; i++) {
174 if (mcasp->serial_dir[i] == TX_MODE) {
180 /* wait for TX ready */
182 while (!(mcasp_get_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(offset)) &
183 TXSTATE) && (cnt < 100000))
186 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
189 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
195 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
196 if (mcasp->txnumevt) { /* enable FIFO */
197 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
198 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
199 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
201 mcasp_start_tx(mcasp);
203 if (mcasp->rxnumevt) { /* enable FIFO */
204 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
205 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
206 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
208 mcasp_start_rx(mcasp);
212 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
215 * In synchronous mode stop the TX clocks if no other stream is
218 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
219 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
221 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
222 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
225 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
230 * In synchronous mode keep TX clocks running if the capture stream is
233 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
234 val = TXHCLKRST | TXCLKRST | TXFSRST;
236 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
237 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
240 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
246 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
247 if (mcasp->txnumevt) { /* disable FIFO */
248 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
249 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
251 mcasp_stop_tx(mcasp);
253 if (mcasp->rxnumevt) { /* disable FIFO */
254 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
255 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
257 mcasp_stop_rx(mcasp);
261 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
264 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
266 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
267 case SND_SOC_DAIFMT_DSP_B:
268 case SND_SOC_DAIFMT_AC97:
269 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
270 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
273 /* configure a full-word SYNC pulse (LRCLK) */
274 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
275 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
277 /* make 1st data bit occur one ACLK cycle after the frame sync */
278 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
279 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
283 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
284 case SND_SOC_DAIFMT_CBS_CFS:
285 /* codec is clock and frame slave */
286 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
287 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
289 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
290 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
292 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
293 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
295 case SND_SOC_DAIFMT_CBM_CFS:
296 /* codec is clock master and frame slave */
297 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
298 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
300 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
301 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
303 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
304 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
306 case SND_SOC_DAIFMT_CBM_CFM:
307 /* codec is clock and frame master */
308 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
309 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
311 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
312 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
314 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG,
315 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
322 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
323 case SND_SOC_DAIFMT_IB_NF:
324 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
325 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
327 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
328 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
331 case SND_SOC_DAIFMT_NB_IF:
332 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
333 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
335 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
336 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
339 case SND_SOC_DAIFMT_IB_IF:
340 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
341 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
343 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
344 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
347 case SND_SOC_DAIFMT_NB_NF:
348 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
349 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
351 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
352 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
362 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
364 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
367 case 0: /* MCLK divider */
368 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
369 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
370 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
371 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
374 case 1: /* BCLK divider */
375 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
376 ACLKXDIV(div - 1), ACLKXDIV_MASK);
377 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
378 ACLKRDIV(div - 1), ACLKRDIV_MASK);
381 case 2: /* BCLK/LRCLK ratio */
382 mcasp->bclk_lrclk_ratio = div;
392 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
393 unsigned int freq, int dir)
395 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
397 if (dir == SND_SOC_CLOCK_OUT) {
398 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
399 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
400 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
402 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
403 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
404 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
410 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
414 u32 tx_rotate = (word_length / 4) & 0x7;
415 u32 rx_rotate = (32 - word_length) / 4;
416 u32 mask = (1ULL << word_length) - 1;
419 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
420 * callback, take it into account here. That allows us to for example
421 * send 32 bits per channel to the codec, while only 16 of them carry
423 * The clock ratio is given for a full period of data (for I2S format
424 * both left and right channels), so it has to be divided by number of
425 * tdm-slots (for I2S - divided by 2).
427 if (mcasp->bclk_lrclk_ratio)
428 word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
430 /* mapping of the XSSZ bit-field as described in the datasheet */
431 fmt = (word_length >> 1) - 1;
433 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
434 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
436 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
438 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
440 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
442 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
445 mcasp_set_reg(mcasp, 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 if (mcasp->version != MCASP_VERSION_4)
462 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
464 /* All PINS as McASP */
465 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
467 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
468 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
469 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
471 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
472 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
475 for (i = 0; i < mcasp->num_serializer; i++) {
476 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
477 mcasp->serial_dir[i]);
478 if (mcasp->serial_dir[i] == TX_MODE &&
479 tx_ser < max_active_serializers) {
480 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
482 } else if (mcasp->serial_dir[i] == RX_MODE &&
483 rx_ser < max_active_serializers) {
484 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
487 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
488 SRMOD_INACTIVE, SRMOD_MASK);
492 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
497 if (ser < max_active_serializers) {
498 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
499 "enabled in mcasp (%d)\n", channels, ser * slots);
503 if (mcasp->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
504 if (mcasp->txnumevt * tx_ser > 64)
507 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
508 mcasp_mod_bits(mcasp, reg, tx_ser, NUMDMA_MASK);
509 mcasp_mod_bits(mcasp, reg, ((mcasp->txnumevt * tx_ser) << 8),
513 if (mcasp->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
514 if (mcasp->rxnumevt * rx_ser > 64)
517 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
518 mcasp_mod_bits(mcasp, reg, rx_ser, NUMDMA_MASK);
519 mcasp_mod_bits(mcasp, reg, ((mcasp->rxnumevt * rx_ser) << 8),
526 static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
532 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
533 for (i = 0; i < active_slots; i++)
536 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
538 if (!mcasp->dat_port)
541 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
542 /* bit stream is MSB first with no delay */
544 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
545 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
547 if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
548 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
549 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
551 printk(KERN_ERR "playback tdm slot %d not supported\n",
554 /* bit stream is MSB first with no delay */
556 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
557 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
559 if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
560 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
561 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
563 printk(KERN_ERR "capture tdm slot %d not supported\n",
569 static void davinci_hw_dit_param(struct davinci_mcasp *mcasp)
571 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
573 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
575 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
576 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
578 /* Set the TX tdm : for all the slots */
579 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
581 /* Set the TX clock controls : div = 1 and internal */
582 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
584 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
586 /* Only 44100 and 48000 are valid, both have the same setting */
587 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
590 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
593 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
594 struct snd_pcm_hw_params *params,
595 struct snd_soc_dai *cpu_dai)
597 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
598 struct davinci_pcm_dma_params *dma_params =
599 &mcasp->dma_params[substream->stream];
600 struct snd_dmaengine_dai_dma_data *dma_data =
601 &mcasp->dma_data[substream->stream];
604 u8 slots = mcasp->tdm_slots;
605 u8 active_serializers;
607 struct snd_interval *pcm_channels = hw_param_interval(params,
608 SNDRV_PCM_HW_PARAM_CHANNELS);
609 channels = pcm_channels->min;
611 active_serializers = (channels + slots - 1) / slots;
613 if (davinci_hw_common_param(mcasp, substream->stream, channels) == -EINVAL)
615 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
616 fifo_level = mcasp->txnumevt * active_serializers;
618 fifo_level = mcasp->rxnumevt * active_serializers;
620 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
621 davinci_hw_dit_param(mcasp);
623 davinci_hw_param(mcasp, substream->stream);
625 switch (params_format(params)) {
626 case SNDRV_PCM_FORMAT_U8:
627 case SNDRV_PCM_FORMAT_S8:
628 dma_params->data_type = 1;
632 case SNDRV_PCM_FORMAT_U16_LE:
633 case SNDRV_PCM_FORMAT_S16_LE:
634 dma_params->data_type = 2;
638 case SNDRV_PCM_FORMAT_U24_3LE:
639 case SNDRV_PCM_FORMAT_S24_3LE:
640 dma_params->data_type = 3;
644 case SNDRV_PCM_FORMAT_U24_LE:
645 case SNDRV_PCM_FORMAT_S24_LE:
646 case SNDRV_PCM_FORMAT_U32_LE:
647 case SNDRV_PCM_FORMAT_S32_LE:
648 dma_params->data_type = 4;
653 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
657 if (mcasp->version == MCASP_VERSION_2 && !fifo_level)
658 dma_params->acnt = 4;
660 dma_params->acnt = dma_params->data_type;
662 dma_params->fifo_level = fifo_level;
663 dma_data->maxburst = fifo_level;
665 davinci_config_channel_size(mcasp, word_length);
670 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
671 int cmd, struct snd_soc_dai *cpu_dai)
673 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
677 case SNDRV_PCM_TRIGGER_RESUME:
678 case SNDRV_PCM_TRIGGER_START:
679 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
680 ret = pm_runtime_get_sync(mcasp->dev);
681 if (IS_ERR_VALUE(ret))
682 dev_err(mcasp->dev, "pm_runtime_get_sync() failed\n");
683 davinci_mcasp_start(mcasp, substream->stream);
686 case SNDRV_PCM_TRIGGER_SUSPEND:
687 davinci_mcasp_stop(mcasp, substream->stream);
688 ret = pm_runtime_put_sync(mcasp->dev);
689 if (IS_ERR_VALUE(ret))
690 dev_err(mcasp->dev, "pm_runtime_put_sync() failed\n");
693 case SNDRV_PCM_TRIGGER_STOP:
694 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
695 davinci_mcasp_stop(mcasp, substream->stream);
705 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
706 struct snd_soc_dai *dai)
708 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
710 if (mcasp->version == MCASP_VERSION_4)
711 snd_soc_dai_set_dma_data(dai, substream,
712 &mcasp->dma_data[substream->stream]);
714 snd_soc_dai_set_dma_data(dai, substream, mcasp->dma_params);
719 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
720 .startup = davinci_mcasp_startup,
721 .trigger = davinci_mcasp_trigger,
722 .hw_params = davinci_mcasp_hw_params,
723 .set_fmt = davinci_mcasp_set_dai_fmt,
724 .set_clkdiv = davinci_mcasp_set_clkdiv,
725 .set_sysclk = davinci_mcasp_set_sysclk,
728 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
730 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
731 SNDRV_PCM_FMTBIT_U8 | \
732 SNDRV_PCM_FMTBIT_S16_LE | \
733 SNDRV_PCM_FMTBIT_U16_LE | \
734 SNDRV_PCM_FMTBIT_S24_LE | \
735 SNDRV_PCM_FMTBIT_U24_LE | \
736 SNDRV_PCM_FMTBIT_S24_3LE | \
737 SNDRV_PCM_FMTBIT_U24_3LE | \
738 SNDRV_PCM_FMTBIT_S32_LE | \
739 SNDRV_PCM_FMTBIT_U32_LE)
741 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
743 .name = "davinci-mcasp.0",
746 .channels_max = 32 * 16,
747 .rates = DAVINCI_MCASP_RATES,
748 .formats = DAVINCI_MCASP_PCM_FMTS,
752 .channels_max = 32 * 16,
753 .rates = DAVINCI_MCASP_RATES,
754 .formats = DAVINCI_MCASP_PCM_FMTS,
756 .ops = &davinci_mcasp_dai_ops,
760 .name = "davinci-mcasp.1",
764 .rates = DAVINCI_MCASP_RATES,
765 .formats = DAVINCI_MCASP_PCM_FMTS,
767 .ops = &davinci_mcasp_dai_ops,
772 static const struct snd_soc_component_driver davinci_mcasp_component = {
773 .name = "davinci-mcasp",
776 /* Some HW specific values and defaults. The rest is filled in from DT. */
777 static struct snd_platform_data dm646x_mcasp_pdata = {
778 .tx_dma_offset = 0x400,
779 .rx_dma_offset = 0x400,
780 .asp_chan_q = EVENTQ_0,
781 .version = MCASP_VERSION_1,
784 static struct snd_platform_data da830_mcasp_pdata = {
785 .tx_dma_offset = 0x2000,
786 .rx_dma_offset = 0x2000,
787 .asp_chan_q = EVENTQ_0,
788 .version = MCASP_VERSION_2,
791 static struct snd_platform_data omap2_mcasp_pdata = {
794 .asp_chan_q = EVENTQ_0,
795 .version = MCASP_VERSION_3,
798 static struct snd_platform_data dra7_mcasp_pdata = {
799 .tx_dma_offset = 0x200,
800 .rx_dma_offset = 0x284,
801 .asp_chan_q = EVENTQ_0,
802 .version = MCASP_VERSION_4,
805 static const struct of_device_id mcasp_dt_ids[] = {
807 .compatible = "ti,dm646x-mcasp-audio",
808 .data = &dm646x_mcasp_pdata,
811 .compatible = "ti,da830-mcasp-audio",
812 .data = &da830_mcasp_pdata,
815 .compatible = "ti,am33xx-mcasp-audio",
816 .data = &omap2_mcasp_pdata,
819 .compatible = "ti,dra7-mcasp-audio",
820 .data = &dra7_mcasp_pdata,
824 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
826 static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
827 struct platform_device *pdev)
829 struct device_node *np = pdev->dev.of_node;
830 struct snd_platform_data *pdata = NULL;
831 const struct of_device_id *match =
832 of_match_device(mcasp_dt_ids, &pdev->dev);
833 struct of_phandle_args dma_spec;
835 const u32 *of_serial_dir32;
839 if (pdev->dev.platform_data) {
840 pdata = pdev->dev.platform_data;
843 pdata = (struct snd_platform_data *) match->data;
845 /* control shouldn't reach here. something is wrong */
850 ret = of_property_read_u32(np, "op-mode", &val);
852 pdata->op_mode = val;
854 ret = of_property_read_u32(np, "tdm-slots", &val);
856 if (val < 2 || val > 32) {
858 "tdm-slots must be in rage [2-32]\n");
863 pdata->tdm_slots = val;
866 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
868 if (of_serial_dir32) {
869 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
870 (sizeof(*of_serial_dir) * val),
872 if (!of_serial_dir) {
877 for (i = 0; i < val; i++)
878 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
880 pdata->num_serializer = val;
881 pdata->serial_dir = of_serial_dir;
884 ret = of_property_match_string(np, "dma-names", "tx");
888 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
893 pdata->tx_dma_channel = dma_spec.args[0];
895 ret = of_property_match_string(np, "dma-names", "rx");
899 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
904 pdata->rx_dma_channel = dma_spec.args[0];
906 ret = of_property_read_u32(np, "tx-num-evt", &val);
908 pdata->txnumevt = val;
910 ret = of_property_read_u32(np, "rx-num-evt", &val);
912 pdata->rxnumevt = val;
914 ret = of_property_read_u32(np, "sram-size-playback", &val);
916 pdata->sram_size_playback = val;
918 ret = of_property_read_u32(np, "sram-size-capture", &val);
920 pdata->sram_size_capture = val;
926 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
933 static int davinci_mcasp_probe(struct platform_device *pdev)
935 struct davinci_pcm_dma_params *dma_data;
936 struct resource *mem, *ioarea, *res, *dat;
937 struct snd_platform_data *pdata;
938 struct davinci_mcasp *mcasp;
941 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
942 dev_err(&pdev->dev, "No platform data supplied\n");
946 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
951 pdata = davinci_mcasp_set_pdata_from_of(pdev);
953 dev_err(&pdev->dev, "no platform data\n");
957 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
960 "\"mpu\" mem resource not found, using index 0\n");
961 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
963 dev_err(&pdev->dev, "no mem resource?\n");
968 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
969 resource_size(mem), pdev->name);
971 dev_err(&pdev->dev, "Audio region already claimed\n");
975 pm_runtime_enable(&pdev->dev);
977 ret = pm_runtime_get_sync(&pdev->dev);
978 if (IS_ERR_VALUE(ret)) {
979 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
983 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
985 dev_err(&pdev->dev, "ioremap failed\n");
987 goto err_release_clk;
990 mcasp->op_mode = pdata->op_mode;
991 mcasp->tdm_slots = pdata->tdm_slots;
992 mcasp->num_serializer = pdata->num_serializer;
993 mcasp->serial_dir = pdata->serial_dir;
994 mcasp->version = pdata->version;
995 mcasp->txnumevt = pdata->txnumevt;
996 mcasp->rxnumevt = pdata->rxnumevt;
998 mcasp->dev = &pdev->dev;
1000 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1002 mcasp->dat_port = true;
1004 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1005 dma_data->asp_chan_q = pdata->asp_chan_q;
1006 dma_data->ram_chan_q = pdata->ram_chan_q;
1007 dma_data->sram_pool = pdata->sram_pool;
1008 dma_data->sram_size = pdata->sram_size_playback;
1010 dma_data->dma_addr = dat->start;
1012 dma_data->dma_addr = mem->start + pdata->tx_dma_offset;
1014 /* Unconditional dmaengine stuff */
1015 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr = dma_data->dma_addr;
1017 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1019 dma_data->channel = res->start;
1021 dma_data->channel = pdata->tx_dma_channel;
1023 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1024 dma_data->asp_chan_q = pdata->asp_chan_q;
1025 dma_data->ram_chan_q = pdata->ram_chan_q;
1026 dma_data->sram_pool = pdata->sram_pool;
1027 dma_data->sram_size = pdata->sram_size_capture;
1029 dma_data->dma_addr = dat->start;
1031 dma_data->dma_addr = mem->start + pdata->rx_dma_offset;
1033 /* Unconditional dmaengine stuff */
1034 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr = dma_data->dma_addr;
1036 if (mcasp->version < MCASP_VERSION_3) {
1037 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1038 /* dma_data->dma_addr is pointing to the data port address */
1039 mcasp->dat_port = true;
1041 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1044 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1046 dma_data->channel = res->start;
1048 dma_data->channel = pdata->rx_dma_channel;
1050 /* Unconditional dmaengine stuff */
1051 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = "tx";
1052 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = "rx";
1054 dev_set_drvdata(&pdev->dev, mcasp);
1055 ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
1056 &davinci_mcasp_dai[pdata->op_mode], 1);
1059 goto err_release_clk;
1061 if (mcasp->version != MCASP_VERSION_4) {
1062 ret = davinci_soc_platform_register(&pdev->dev);
1064 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1065 goto err_unregister_component;
1071 err_unregister_component:
1072 snd_soc_unregister_component(&pdev->dev);
1074 pm_runtime_put_sync(&pdev->dev);
1075 pm_runtime_disable(&pdev->dev);
1079 static int davinci_mcasp_remove(struct platform_device *pdev)
1081 struct davinci_mcasp *mcasp = dev_get_drvdata(&pdev->dev);
1083 snd_soc_unregister_component(&pdev->dev);
1084 if (mcasp->version != MCASP_VERSION_4)
1085 davinci_soc_platform_unregister(&pdev->dev);
1087 pm_runtime_put_sync(&pdev->dev);
1088 pm_runtime_disable(&pdev->dev);
1093 #ifdef CONFIG_PM_SLEEP
1094 static int davinci_mcasp_suspend(struct device *dev)
1096 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1098 mcasp->context.txfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG);
1099 mcasp->context.rxfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
1100 mcasp->context.txfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMT_REG);
1101 mcasp->context.rxfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMT_REG);
1102 mcasp->context.aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
1103 mcasp->context.aclkrctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG);
1104 mcasp->context.pdir = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
1109 static int davinci_mcasp_resume(struct device *dev)
1111 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1113 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, mcasp->context.txfmtctl);
1114 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG, mcasp->context.rxfmtctl);
1115 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMT_REG, mcasp->context.txfmt);
1116 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMT_REG, mcasp->context.rxfmt);
1117 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, mcasp->context.aclkxctl);
1118 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, mcasp->context.aclkrctl);
1119 mcasp_set_reg(mcasp, DAVINCI_MCASP_PDIR_REG, mcasp->context.pdir);
1125 SIMPLE_DEV_PM_OPS(davinci_mcasp_pm_ops,
1126 davinci_mcasp_suspend,
1127 davinci_mcasp_resume);
1129 static struct platform_driver davinci_mcasp_driver = {
1130 .probe = davinci_mcasp_probe,
1131 .remove = davinci_mcasp_remove,
1133 .name = "davinci-mcasp",
1134 .owner = THIS_MODULE,
1135 .pm = &davinci_mcasp_pm_ops,
1136 .of_match_table = mcasp_dt_ids,
1140 module_platform_driver(davinci_mcasp_driver);
1142 MODULE_AUTHOR("Steve Chen");
1143 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1144 MODULE_LICENSE("GPL");