2 * ALSA SoC McASP Audio Layer for TI DAVINCI processor
4 * Multi-channel Audio Serial Port Driver
6 * Author: Nirmal Pandey <n-pandey@ti.com>,
7 * Suresh Rajashekara <suresh.r@ti.com>
8 * Steve Chen <schen@.mvista.com>
10 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
11 * Copyright: (C) 2009 Texas Instruments, India
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/init.h>
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/slab.h>
22 #include <linux/delay.h>
24 #include <linux/clk.h>
25 #include <linux/pm_runtime.h>
27 #include <linux/of_platform.h>
28 #include <linux/of_device.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/initval.h>
34 #include <sound/soc.h>
35 #include <sound/dmaengine_pcm.h>
37 #include "davinci-pcm.h"
38 #include "davinci-mcasp.h"
40 struct davinci_mcasp {
41 struct davinci_pcm_dma_params dma_params[2];
42 struct snd_dmaengine_dai_dma_data dma_data[2];
47 /* McASP specific data */
56 /* McASP FIFO related */
62 #ifdef CONFIG_PM_SLEEP
75 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
78 void __iomem *reg = mcasp->base + offset;
79 __raw_writel(__raw_readl(reg) | val, reg);
82 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
85 void __iomem *reg = mcasp->base + offset;
86 __raw_writel((__raw_readl(reg) & ~(val)), reg);
89 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
92 void __iomem *reg = mcasp->base + offset;
93 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
96 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
99 __raw_writel(val, mcasp->base + offset);
102 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
104 return (u32)__raw_readl(mcasp->base + offset);
107 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
111 mcasp_set_bits(mcasp, ctl_reg, val);
113 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
114 /* loop count is to avoid the lock-up */
115 for (i = 0; i < 1000; i++) {
116 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
120 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
121 printk(KERN_ERR "GBLCTL write error\n");
124 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
126 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
127 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
129 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
132 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
134 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
135 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
138 * When ASYNC == 0 the transmit and receive sections operate
139 * synchronously from the transmit clock and frame sync. We need to make
140 * sure that the TX signlas are enabled when starting reception.
142 if (mcasp_is_synchronous(mcasp)) {
143 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
144 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
147 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
148 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
150 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
151 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
152 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXBUF_REG, 0);
154 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
155 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
157 if (mcasp_is_synchronous(mcasp))
158 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
161 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
166 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
167 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
168 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
169 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
171 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
172 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
173 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
174 for (i = 0; i < mcasp->num_serializer; i++) {
175 if (mcasp->serial_dir[i] == TX_MODE) {
181 /* wait for TX ready */
183 while (!(mcasp_get_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(offset)) &
184 TXSTATE) && (cnt < 100000))
187 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXBUF_REG, 0);
190 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
196 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
197 if (mcasp->txnumevt) { /* enable FIFO */
198 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
199 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
200 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
202 mcasp_start_tx(mcasp);
204 if (mcasp->rxnumevt) { /* enable FIFO */
205 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
206 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
207 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
209 mcasp_start_rx(mcasp);
213 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
216 * In synchronous mode stop the TX clocks if no other stream is
219 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
220 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
222 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
223 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
226 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
231 * In synchronous mode keep TX clocks running if the capture stream is
234 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
235 val = TXHCLKRST | TXCLKRST | TXFSRST;
237 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
238 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
241 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
247 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
248 if (mcasp->txnumevt) { /* disable FIFO */
249 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
250 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
252 mcasp_stop_tx(mcasp);
254 if (mcasp->rxnumevt) { /* disable FIFO */
255 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
256 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
258 mcasp_stop_rx(mcasp);
262 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
265 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
267 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
268 case SND_SOC_DAIFMT_DSP_B:
269 case SND_SOC_DAIFMT_AC97:
270 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
271 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
274 /* configure a full-word SYNC pulse (LRCLK) */
275 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
276 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
278 /* make 1st data bit occur one ACLK cycle after the frame sync */
279 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
280 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
284 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
285 case SND_SOC_DAIFMT_CBS_CFS:
286 /* codec is clock and frame slave */
287 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
288 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
290 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
291 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
293 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
294 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
296 case SND_SOC_DAIFMT_CBM_CFS:
297 /* codec is clock master and frame slave */
298 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
299 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
301 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
302 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
304 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
305 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
307 case SND_SOC_DAIFMT_CBM_CFM:
308 /* codec is clock and frame master */
309 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
310 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
312 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
313 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
315 mcasp_clr_bits(mcasp, 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(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
326 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
328 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
329 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
332 case SND_SOC_DAIFMT_NB_IF:
333 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
334 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
336 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
337 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
340 case SND_SOC_DAIFMT_IB_IF:
341 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
342 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
344 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
345 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
348 case SND_SOC_DAIFMT_NB_NF:
349 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
350 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
352 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
353 mcasp_clr_bits(mcasp, 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, DAVINCI_MCASP_AHCLKXCTL_REG,
370 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
371 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
372 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
375 case 1: /* BCLK divider */
376 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
377 ACLKXDIV(div - 1), ACLKXDIV_MASK);
378 mcasp_mod_bits(mcasp, 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, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
400 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
401 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
403 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
404 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
405 mcasp_clr_bits(mcasp, 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, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
437 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
439 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
441 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
443 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
446 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
451 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
458 u8 slots = mcasp->tdm_slots;
459 u8 max_active_serializers = (channels + slots - 1) / slots;
461 /* Default configuration */
462 if (mcasp->version != MCASP_VERSION_4)
463 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
465 /* All PINS as McASP */
466 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
468 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
469 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
470 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
472 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
473 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
476 for (i = 0; i < mcasp->num_serializer; i++) {
477 mcasp_set_bits(mcasp, 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, DAVINCI_MCASP_PDIR_REG, AXR(i));
483 } else if (mcasp->serial_dir[i] == RX_MODE &&
484 rx_ser < max_active_serializers) {
485 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
488 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
489 SRMOD_INACTIVE, SRMOD_MASK);
493 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
498 if (ser < max_active_serializers) {
499 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
500 "enabled in mcasp (%d)\n", channels, ser * slots);
504 if (mcasp->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
505 if (mcasp->txnumevt * tx_ser > 64)
508 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
509 mcasp_mod_bits(mcasp, reg, tx_ser, NUMDMA_MASK);
510 mcasp_mod_bits(mcasp, reg, ((mcasp->txnumevt * tx_ser) << 8),
514 if (mcasp->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
515 if (mcasp->rxnumevt * rx_ser > 64)
518 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
519 mcasp_mod_bits(mcasp, reg, rx_ser, NUMDMA_MASK);
520 mcasp_mod_bits(mcasp, reg, ((mcasp->rxnumevt * rx_ser) << 8),
527 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
533 if ((mcasp->tdm_slots < 2) || (mcasp->tdm_slots > 32)) {
534 dev_err(mcasp->dev, "tdm slot %d not supported\n",
539 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
540 for (i = 0; i < active_slots; i++)
543 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
545 if (!mcasp->dat_port)
548 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
549 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
550 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
551 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
553 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
554 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
555 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
556 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
562 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp)
564 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
566 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
568 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
569 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
571 /* Set the TX tdm : for all the slots */
572 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
574 /* Set the TX clock controls : div = 1 and internal */
575 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
577 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
579 /* Only 44100 and 48000 are valid, both have the same setting */
580 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
583 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
588 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
589 struct snd_pcm_hw_params *params,
590 struct snd_soc_dai *cpu_dai)
592 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
593 struct davinci_pcm_dma_params *dma_params =
594 &mcasp->dma_params[substream->stream];
595 struct snd_dmaengine_dai_dma_data *dma_data =
596 &mcasp->dma_data[substream->stream];
599 u8 slots = mcasp->tdm_slots;
600 u8 active_serializers;
603 struct snd_interval *pcm_channels = hw_param_interval(params,
604 SNDRV_PCM_HW_PARAM_CHANNELS);
605 channels = pcm_channels->min;
607 active_serializers = (channels + slots - 1) / slots;
609 if (mcasp_common_hw_param(mcasp, substream->stream, channels) == -EINVAL)
611 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
612 fifo_level = mcasp->txnumevt * active_serializers;
614 fifo_level = mcasp->rxnumevt * active_serializers;
616 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
617 ret = mcasp_dit_hw_param(mcasp);
619 ret = mcasp_i2s_hw_param(mcasp, substream->stream);
624 switch (params_format(params)) {
625 case SNDRV_PCM_FORMAT_U8:
626 case SNDRV_PCM_FORMAT_S8:
627 dma_params->data_type = 1;
631 case SNDRV_PCM_FORMAT_U16_LE:
632 case SNDRV_PCM_FORMAT_S16_LE:
633 dma_params->data_type = 2;
637 case SNDRV_PCM_FORMAT_U24_3LE:
638 case SNDRV_PCM_FORMAT_S24_3LE:
639 dma_params->data_type = 3;
643 case SNDRV_PCM_FORMAT_U24_LE:
644 case SNDRV_PCM_FORMAT_S24_LE:
645 case SNDRV_PCM_FORMAT_U32_LE:
646 case SNDRV_PCM_FORMAT_S32_LE:
647 dma_params->data_type = 4;
652 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
656 if (mcasp->version == MCASP_VERSION_2 && !fifo_level)
657 dma_params->acnt = 4;
659 dma_params->acnt = dma_params->data_type;
661 dma_params->fifo_level = fifo_level;
662 dma_data->maxburst = fifo_level;
664 davinci_config_channel_size(mcasp, word_length);
669 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
670 int cmd, struct snd_soc_dai *cpu_dai)
672 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
676 case SNDRV_PCM_TRIGGER_RESUME:
677 case SNDRV_PCM_TRIGGER_START:
678 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
679 ret = pm_runtime_get_sync(mcasp->dev);
680 if (IS_ERR_VALUE(ret))
681 dev_err(mcasp->dev, "pm_runtime_get_sync() failed\n");
682 davinci_mcasp_start(mcasp, substream->stream);
685 case SNDRV_PCM_TRIGGER_SUSPEND:
686 davinci_mcasp_stop(mcasp, substream->stream);
687 ret = pm_runtime_put_sync(mcasp->dev);
688 if (IS_ERR_VALUE(ret))
689 dev_err(mcasp->dev, "pm_runtime_put_sync() failed\n");
692 case SNDRV_PCM_TRIGGER_STOP:
693 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
694 davinci_mcasp_stop(mcasp, substream->stream);
704 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
705 struct snd_soc_dai *dai)
707 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
709 if (mcasp->version == MCASP_VERSION_4)
710 snd_soc_dai_set_dma_data(dai, substream,
711 &mcasp->dma_data[substream->stream]);
713 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 am33xx_mcasp_pdata = {
793 .asp_chan_q = EVENTQ_0,
794 .version = MCASP_VERSION_3,
797 static struct snd_platform_data dra7_mcasp_pdata = {
798 .tx_dma_offset = 0x200,
799 .rx_dma_offset = 0x284,
800 .asp_chan_q = EVENTQ_0,
801 .version = MCASP_VERSION_4,
804 static const struct of_device_id mcasp_dt_ids[] = {
806 .compatible = "ti,dm646x-mcasp-audio",
807 .data = &dm646x_mcasp_pdata,
810 .compatible = "ti,da830-mcasp-audio",
811 .data = &da830_mcasp_pdata,
814 .compatible = "ti,am33xx-mcasp-audio",
815 .data = &am33xx_mcasp_pdata,
818 .compatible = "ti,dra7-mcasp-audio",
819 .data = &dra7_mcasp_pdata,
823 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
825 static int mcasp_reparent_fck(struct platform_device *pdev)
827 struct device_node *node = pdev->dev.of_node;
828 struct clk *gfclk, *parent_clk;
829 const char *parent_name;
835 parent_name = of_get_property(node, "fck_parent", NULL);
839 gfclk = clk_get(&pdev->dev, "fck");
841 dev_err(&pdev->dev, "failed to get fck\n");
842 return PTR_ERR(gfclk);
845 parent_clk = clk_get(NULL, parent_name);
846 if (IS_ERR(parent_clk)) {
847 dev_err(&pdev->dev, "failed to get parent clock\n");
848 ret = PTR_ERR(parent_clk);
852 ret = clk_set_parent(gfclk, parent_clk);
854 dev_err(&pdev->dev, "failed to reparent fck\n");
865 static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
866 struct platform_device *pdev)
868 struct device_node *np = pdev->dev.of_node;
869 struct snd_platform_data *pdata = NULL;
870 const struct of_device_id *match =
871 of_match_device(mcasp_dt_ids, &pdev->dev);
872 struct of_phandle_args dma_spec;
874 const u32 *of_serial_dir32;
878 if (pdev->dev.platform_data) {
879 pdata = pdev->dev.platform_data;
882 pdata = (struct snd_platform_data *) match->data;
884 /* control shouldn't reach here. something is wrong */
889 ret = of_property_read_u32(np, "op-mode", &val);
891 pdata->op_mode = val;
893 ret = of_property_read_u32(np, "tdm-slots", &val);
895 if (val < 2 || val > 32) {
897 "tdm-slots must be in rage [2-32]\n");
902 pdata->tdm_slots = val;
905 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
907 if (of_serial_dir32) {
908 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
909 (sizeof(*of_serial_dir) * val),
911 if (!of_serial_dir) {
916 for (i = 0; i < val; i++)
917 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
919 pdata->num_serializer = val;
920 pdata->serial_dir = of_serial_dir;
923 ret = of_property_match_string(np, "dma-names", "tx");
927 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
932 pdata->tx_dma_channel = dma_spec.args[0];
934 ret = of_property_match_string(np, "dma-names", "rx");
938 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
943 pdata->rx_dma_channel = dma_spec.args[0];
945 ret = of_property_read_u32(np, "tx-num-evt", &val);
947 pdata->txnumevt = val;
949 ret = of_property_read_u32(np, "rx-num-evt", &val);
951 pdata->rxnumevt = val;
953 ret = of_property_read_u32(np, "sram-size-playback", &val);
955 pdata->sram_size_playback = val;
957 ret = of_property_read_u32(np, "sram-size-capture", &val);
959 pdata->sram_size_capture = val;
965 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
972 static int davinci_mcasp_probe(struct platform_device *pdev)
974 struct davinci_pcm_dma_params *dma_data;
975 struct resource *mem, *ioarea, *res, *dat;
976 struct snd_platform_data *pdata;
977 struct davinci_mcasp *mcasp;
980 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
981 dev_err(&pdev->dev, "No platform data supplied\n");
985 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
990 pdata = davinci_mcasp_set_pdata_from_of(pdev);
992 dev_err(&pdev->dev, "no platform data\n");
996 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
999 "\"mpu\" mem resource not found, using index 0\n");
1000 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1002 dev_err(&pdev->dev, "no mem resource?\n");
1007 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
1008 resource_size(mem), pdev->name);
1010 dev_err(&pdev->dev, "Audio region already claimed\n");
1014 pm_runtime_enable(&pdev->dev);
1016 ret = pm_runtime_get_sync(&pdev->dev);
1017 if (IS_ERR_VALUE(ret)) {
1018 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
1022 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
1024 dev_err(&pdev->dev, "ioremap failed\n");
1026 goto err_release_clk;
1029 mcasp->op_mode = pdata->op_mode;
1030 mcasp->tdm_slots = pdata->tdm_slots;
1031 mcasp->num_serializer = pdata->num_serializer;
1032 mcasp->serial_dir = pdata->serial_dir;
1033 mcasp->version = pdata->version;
1034 mcasp->txnumevt = pdata->txnumevt;
1035 mcasp->rxnumevt = pdata->rxnumevt;
1037 mcasp->dev = &pdev->dev;
1039 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1041 mcasp->dat_port = true;
1043 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1044 dma_data->asp_chan_q = pdata->asp_chan_q;
1045 dma_data->ram_chan_q = pdata->ram_chan_q;
1046 dma_data->sram_pool = pdata->sram_pool;
1047 dma_data->sram_size = pdata->sram_size_playback;
1049 dma_data->dma_addr = dat->start;
1051 dma_data->dma_addr = mem->start + pdata->tx_dma_offset;
1053 /* Unconditional dmaengine stuff */
1054 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr = dma_data->dma_addr;
1056 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1058 dma_data->channel = res->start;
1060 dma_data->channel = pdata->tx_dma_channel;
1062 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1063 dma_data->asp_chan_q = pdata->asp_chan_q;
1064 dma_data->ram_chan_q = pdata->ram_chan_q;
1065 dma_data->sram_pool = pdata->sram_pool;
1066 dma_data->sram_size = pdata->sram_size_capture;
1068 dma_data->dma_addr = dat->start;
1070 dma_data->dma_addr = mem->start + pdata->rx_dma_offset;
1072 /* Unconditional dmaengine stuff */
1073 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr = dma_data->dma_addr;
1075 if (mcasp->version < MCASP_VERSION_3) {
1076 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1077 /* dma_data->dma_addr is pointing to the data port address */
1078 mcasp->dat_port = true;
1080 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1083 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1085 dma_data->channel = res->start;
1087 dma_data->channel = pdata->rx_dma_channel;
1089 /* Unconditional dmaengine stuff */
1090 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = "tx";
1091 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = "rx";
1093 dev_set_drvdata(&pdev->dev, mcasp);
1095 mcasp_reparent_fck(pdev);
1097 ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
1098 &davinci_mcasp_dai[pdata->op_mode], 1);
1101 goto err_release_clk;
1103 if (mcasp->version != MCASP_VERSION_4) {
1104 ret = davinci_soc_platform_register(&pdev->dev);
1106 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1107 goto err_unregister_component;
1113 err_unregister_component:
1114 snd_soc_unregister_component(&pdev->dev);
1116 pm_runtime_put_sync(&pdev->dev);
1117 pm_runtime_disable(&pdev->dev);
1121 static int davinci_mcasp_remove(struct platform_device *pdev)
1123 struct davinci_mcasp *mcasp = dev_get_drvdata(&pdev->dev);
1125 snd_soc_unregister_component(&pdev->dev);
1126 if (mcasp->version != MCASP_VERSION_4)
1127 davinci_soc_platform_unregister(&pdev->dev);
1129 pm_runtime_put_sync(&pdev->dev);
1130 pm_runtime_disable(&pdev->dev);
1135 #ifdef CONFIG_PM_SLEEP
1136 static int davinci_mcasp_suspend(struct device *dev)
1138 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1140 mcasp->context.txfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG);
1141 mcasp->context.rxfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
1142 mcasp->context.txfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMT_REG);
1143 mcasp->context.rxfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMT_REG);
1144 mcasp->context.aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
1145 mcasp->context.aclkrctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG);
1146 mcasp->context.pdir = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
1151 static int davinci_mcasp_resume(struct device *dev)
1153 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1155 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, mcasp->context.txfmtctl);
1156 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG, mcasp->context.rxfmtctl);
1157 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMT_REG, mcasp->context.txfmt);
1158 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMT_REG, mcasp->context.rxfmt);
1159 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, mcasp->context.aclkxctl);
1160 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, mcasp->context.aclkrctl);
1161 mcasp_set_reg(mcasp, DAVINCI_MCASP_PDIR_REG, mcasp->context.pdir);
1167 SIMPLE_DEV_PM_OPS(davinci_mcasp_pm_ops,
1168 davinci_mcasp_suspend,
1169 davinci_mcasp_resume);
1171 static struct platform_driver davinci_mcasp_driver = {
1172 .probe = davinci_mcasp_probe,
1173 .remove = davinci_mcasp_remove,
1175 .name = "davinci-mcasp",
1176 .owner = THIS_MODULE,
1177 .pm = &davinci_mcasp_pm_ops,
1178 .of_match_table = mcasp_dt_ids,
1182 module_platform_driver(davinci_mcasp_driver);
1184 MODULE_AUTHOR("Steve Chen");
1185 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1186 MODULE_LICENSE("GPL");