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);
268 pm_runtime_get_sync(mcasp->dev);
269 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
270 case SND_SOC_DAIFMT_DSP_B:
271 case SND_SOC_DAIFMT_AC97:
272 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
273 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
276 /* configure a full-word SYNC pulse (LRCLK) */
277 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
278 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
280 /* make 1st data bit occur one ACLK cycle after the frame sync */
281 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
282 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
286 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
287 case SND_SOC_DAIFMT_CBS_CFS:
288 /* codec is clock and frame slave */
289 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
290 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
292 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
293 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
295 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
296 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
298 case SND_SOC_DAIFMT_CBM_CFS:
299 /* codec is clock master and frame slave */
300 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
301 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
303 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
304 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
306 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
307 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
309 case SND_SOC_DAIFMT_CBM_CFM:
310 /* codec is clock and frame master */
311 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
312 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
314 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
315 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
317 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG,
318 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
326 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
327 case SND_SOC_DAIFMT_IB_NF:
328 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
329 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
331 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
332 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
335 case SND_SOC_DAIFMT_NB_IF:
336 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
337 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
339 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
340 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
343 case SND_SOC_DAIFMT_IB_IF:
344 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
345 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
347 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
348 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
351 case SND_SOC_DAIFMT_NB_NF:
352 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
353 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
355 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
356 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
364 pm_runtime_put_sync(mcasp->dev);
368 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
370 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
373 case 0: /* MCLK divider */
374 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
375 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
376 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
377 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
380 case 1: /* BCLK divider */
381 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
382 ACLKXDIV(div - 1), ACLKXDIV_MASK);
383 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
384 ACLKRDIV(div - 1), ACLKRDIV_MASK);
387 case 2: /* BCLK/LRCLK ratio */
388 mcasp->bclk_lrclk_ratio = div;
398 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
399 unsigned int freq, int dir)
401 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
403 if (dir == SND_SOC_CLOCK_OUT) {
404 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
405 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
406 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
408 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
409 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
410 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
416 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
420 u32 tx_rotate = (word_length / 4) & 0x7;
421 u32 mask = (1ULL << word_length) - 1;
423 * For captured data we should not rotate, inversion and masking is
424 * enoguh to get the data to the right position:
425 * Format data from bus after reverse (XRBUF)
426 * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB|
427 * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
428 * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
429 * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB|
434 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
435 * callback, take it into account here. That allows us to for example
436 * send 32 bits per channel to the codec, while only 16 of them carry
438 * The clock ratio is given for a full period of data (for I2S format
439 * both left and right channels), so it has to be divided by number of
440 * tdm-slots (for I2S - divided by 2).
442 if (mcasp->bclk_lrclk_ratio)
443 word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
445 /* mapping of the XSSZ bit-field as described in the datasheet */
446 fmt = (word_length >> 1) - 1;
448 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
449 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
451 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
453 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
455 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
457 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
460 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
465 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
472 u8 slots = mcasp->tdm_slots;
473 u8 max_active_serializers = (channels + slots - 1) / slots;
475 /* Default configuration */
476 if (mcasp->version != MCASP_VERSION_4)
477 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
479 /* All PINS as McASP */
480 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
482 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
483 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
484 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
486 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
487 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
490 for (i = 0; i < mcasp->num_serializer; i++) {
491 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
492 mcasp->serial_dir[i]);
493 if (mcasp->serial_dir[i] == TX_MODE &&
494 tx_ser < max_active_serializers) {
495 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
497 } else if (mcasp->serial_dir[i] == RX_MODE &&
498 rx_ser < max_active_serializers) {
499 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
502 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
503 SRMOD_INACTIVE, SRMOD_MASK);
507 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
512 if (ser < max_active_serializers) {
513 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
514 "enabled in mcasp (%d)\n", channels, ser * slots);
518 if (mcasp->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
519 if (mcasp->txnumevt * tx_ser > 64)
522 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
523 mcasp_mod_bits(mcasp, reg, tx_ser, NUMDMA_MASK);
524 mcasp_mod_bits(mcasp, reg, ((mcasp->txnumevt * tx_ser) << 8),
528 if (mcasp->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
529 if (mcasp->rxnumevt * rx_ser > 64)
532 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
533 mcasp_mod_bits(mcasp, reg, rx_ser, NUMDMA_MASK);
534 mcasp_mod_bits(mcasp, reg, ((mcasp->rxnumevt * rx_ser) << 8),
541 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
547 if ((mcasp->tdm_slots < 2) || (mcasp->tdm_slots > 32)) {
548 dev_err(mcasp->dev, "tdm slot %d not supported\n",
553 active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
554 for (i = 0; i < active_slots; i++)
557 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
559 if (!mcasp->dat_port)
562 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
563 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
564 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
565 FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
567 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
568 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
569 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
570 FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
576 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp)
578 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
580 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
582 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
583 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
585 /* Set the TX tdm : for all the slots */
586 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
588 /* Set the TX clock controls : div = 1 and internal */
589 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
591 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
593 /* Only 44100 and 48000 are valid, both have the same setting */
594 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
597 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
602 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
603 struct snd_pcm_hw_params *params,
604 struct snd_soc_dai *cpu_dai)
606 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
607 struct davinci_pcm_dma_params *dma_params =
608 &mcasp->dma_params[substream->stream];
609 struct snd_dmaengine_dai_dma_data *dma_data =
610 &mcasp->dma_data[substream->stream];
613 u8 slots = mcasp->tdm_slots;
614 u8 active_serializers;
617 struct snd_interval *pcm_channels = hw_param_interval(params,
618 SNDRV_PCM_HW_PARAM_CHANNELS);
619 channels = pcm_channels->min;
621 active_serializers = (channels + slots - 1) / slots;
623 if (mcasp_common_hw_param(mcasp, substream->stream, channels) == -EINVAL)
625 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
626 fifo_level = mcasp->txnumevt * active_serializers;
628 fifo_level = mcasp->rxnumevt * active_serializers;
630 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
631 ret = mcasp_dit_hw_param(mcasp);
633 ret = mcasp_i2s_hw_param(mcasp, substream->stream);
638 switch (params_format(params)) {
639 case SNDRV_PCM_FORMAT_U8:
640 case SNDRV_PCM_FORMAT_S8:
641 dma_params->data_type = 1;
645 case SNDRV_PCM_FORMAT_U16_LE:
646 case SNDRV_PCM_FORMAT_S16_LE:
647 dma_params->data_type = 2;
651 case SNDRV_PCM_FORMAT_U24_3LE:
652 case SNDRV_PCM_FORMAT_S24_3LE:
653 dma_params->data_type = 3;
657 case SNDRV_PCM_FORMAT_U24_LE:
658 case SNDRV_PCM_FORMAT_S24_LE:
659 case SNDRV_PCM_FORMAT_U32_LE:
660 case SNDRV_PCM_FORMAT_S32_LE:
661 dma_params->data_type = 4;
666 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
670 if (mcasp->version == MCASP_VERSION_2 && !fifo_level)
671 dma_params->acnt = 4;
673 dma_params->acnt = dma_params->data_type;
675 dma_params->fifo_level = fifo_level;
676 dma_data->maxburst = fifo_level;
678 davinci_config_channel_size(mcasp, word_length);
683 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
684 int cmd, struct snd_soc_dai *cpu_dai)
686 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
690 case SNDRV_PCM_TRIGGER_RESUME:
691 case SNDRV_PCM_TRIGGER_START:
692 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
693 davinci_mcasp_start(mcasp, substream->stream);
695 case SNDRV_PCM_TRIGGER_SUSPEND:
696 case SNDRV_PCM_TRIGGER_STOP:
697 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
698 davinci_mcasp_stop(mcasp, substream->stream);
708 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
709 struct snd_soc_dai *dai)
711 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
713 if (mcasp->version == MCASP_VERSION_4)
714 snd_soc_dai_set_dma_data(dai, substream,
715 &mcasp->dma_data[substream->stream]);
717 snd_soc_dai_set_dma_data(dai, substream, mcasp->dma_params);
722 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
723 .startup = davinci_mcasp_startup,
724 .trigger = davinci_mcasp_trigger,
725 .hw_params = davinci_mcasp_hw_params,
726 .set_fmt = davinci_mcasp_set_dai_fmt,
727 .set_clkdiv = davinci_mcasp_set_clkdiv,
728 .set_sysclk = davinci_mcasp_set_sysclk,
731 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
733 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
734 SNDRV_PCM_FMTBIT_U8 | \
735 SNDRV_PCM_FMTBIT_S16_LE | \
736 SNDRV_PCM_FMTBIT_U16_LE | \
737 SNDRV_PCM_FMTBIT_S24_LE | \
738 SNDRV_PCM_FMTBIT_U24_LE | \
739 SNDRV_PCM_FMTBIT_S24_3LE | \
740 SNDRV_PCM_FMTBIT_U24_3LE | \
741 SNDRV_PCM_FMTBIT_S32_LE | \
742 SNDRV_PCM_FMTBIT_U32_LE)
744 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
746 .name = "davinci-mcasp.0",
749 .channels_max = 32 * 16,
750 .rates = DAVINCI_MCASP_RATES,
751 .formats = DAVINCI_MCASP_PCM_FMTS,
755 .channels_max = 32 * 16,
756 .rates = DAVINCI_MCASP_RATES,
757 .formats = DAVINCI_MCASP_PCM_FMTS,
759 .ops = &davinci_mcasp_dai_ops,
763 .name = "davinci-mcasp.1",
767 .rates = DAVINCI_MCASP_RATES,
768 .formats = DAVINCI_MCASP_PCM_FMTS,
770 .ops = &davinci_mcasp_dai_ops,
775 static const struct snd_soc_component_driver davinci_mcasp_component = {
776 .name = "davinci-mcasp",
779 /* Some HW specific values and defaults. The rest is filled in from DT. */
780 static struct snd_platform_data dm646x_mcasp_pdata = {
781 .tx_dma_offset = 0x400,
782 .rx_dma_offset = 0x400,
783 .asp_chan_q = EVENTQ_0,
784 .version = MCASP_VERSION_1,
787 static struct snd_platform_data da830_mcasp_pdata = {
788 .tx_dma_offset = 0x2000,
789 .rx_dma_offset = 0x2000,
790 .asp_chan_q = EVENTQ_0,
791 .version = MCASP_VERSION_2,
794 static struct snd_platform_data am33xx_mcasp_pdata = {
797 .asp_chan_q = EVENTQ_0,
798 .version = MCASP_VERSION_3,
801 static struct snd_platform_data dra7_mcasp_pdata = {
802 .tx_dma_offset = 0x200,
803 .rx_dma_offset = 0x284,
804 .asp_chan_q = EVENTQ_0,
805 .version = MCASP_VERSION_4,
808 static const struct of_device_id mcasp_dt_ids[] = {
810 .compatible = "ti,dm646x-mcasp-audio",
811 .data = &dm646x_mcasp_pdata,
814 .compatible = "ti,da830-mcasp-audio",
815 .data = &da830_mcasp_pdata,
818 .compatible = "ti,am33xx-mcasp-audio",
819 .data = &am33xx_mcasp_pdata,
822 .compatible = "ti,dra7-mcasp-audio",
823 .data = &dra7_mcasp_pdata,
827 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
829 static int mcasp_reparent_fck(struct platform_device *pdev)
831 struct device_node *node = pdev->dev.of_node;
832 struct clk *gfclk, *parent_clk;
833 const char *parent_name;
839 parent_name = of_get_property(node, "fck_parent", NULL);
843 gfclk = clk_get(&pdev->dev, "fck");
845 dev_err(&pdev->dev, "failed to get fck\n");
846 return PTR_ERR(gfclk);
849 parent_clk = clk_get(NULL, parent_name);
850 if (IS_ERR(parent_clk)) {
851 dev_err(&pdev->dev, "failed to get parent clock\n");
852 ret = PTR_ERR(parent_clk);
856 ret = clk_set_parent(gfclk, parent_clk);
858 dev_err(&pdev->dev, "failed to reparent fck\n");
869 static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
870 struct platform_device *pdev)
872 struct device_node *np = pdev->dev.of_node;
873 struct snd_platform_data *pdata = NULL;
874 const struct of_device_id *match =
875 of_match_device(mcasp_dt_ids, &pdev->dev);
876 struct of_phandle_args dma_spec;
878 const u32 *of_serial_dir32;
882 if (pdev->dev.platform_data) {
883 pdata = pdev->dev.platform_data;
886 pdata = (struct snd_platform_data *) match->data;
888 /* control shouldn't reach here. something is wrong */
893 ret = of_property_read_u32(np, "op-mode", &val);
895 pdata->op_mode = val;
897 ret = of_property_read_u32(np, "tdm-slots", &val);
899 if (val < 2 || val > 32) {
901 "tdm-slots must be in rage [2-32]\n");
906 pdata->tdm_slots = val;
909 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
911 if (of_serial_dir32) {
912 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
913 (sizeof(*of_serial_dir) * val),
915 if (!of_serial_dir) {
920 for (i = 0; i < val; i++)
921 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
923 pdata->num_serializer = val;
924 pdata->serial_dir = of_serial_dir;
927 ret = of_property_match_string(np, "dma-names", "tx");
931 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
936 pdata->tx_dma_channel = dma_spec.args[0];
938 ret = of_property_match_string(np, "dma-names", "rx");
942 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
947 pdata->rx_dma_channel = dma_spec.args[0];
949 ret = of_property_read_u32(np, "tx-num-evt", &val);
951 pdata->txnumevt = val;
953 ret = of_property_read_u32(np, "rx-num-evt", &val);
955 pdata->rxnumevt = val;
957 ret = of_property_read_u32(np, "sram-size-playback", &val);
959 pdata->sram_size_playback = val;
961 ret = of_property_read_u32(np, "sram-size-capture", &val);
963 pdata->sram_size_capture = val;
969 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
976 static int davinci_mcasp_probe(struct platform_device *pdev)
978 struct davinci_pcm_dma_params *dma_data;
979 struct resource *mem, *ioarea, *res, *dat;
980 struct snd_platform_data *pdata;
981 struct davinci_mcasp *mcasp;
984 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
985 dev_err(&pdev->dev, "No platform data supplied\n");
989 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
994 pdata = davinci_mcasp_set_pdata_from_of(pdev);
996 dev_err(&pdev->dev, "no platform data\n");
1000 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1002 dev_warn(mcasp->dev,
1003 "\"mpu\" mem resource not found, using index 0\n");
1004 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1006 dev_err(&pdev->dev, "no mem resource?\n");
1011 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
1012 resource_size(mem), pdev->name);
1014 dev_err(&pdev->dev, "Audio region already claimed\n");
1018 pm_runtime_enable(&pdev->dev);
1020 ret = pm_runtime_get_sync(&pdev->dev);
1021 if (IS_ERR_VALUE(ret)) {
1022 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
1026 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
1028 dev_err(&pdev->dev, "ioremap failed\n");
1030 goto err_release_clk;
1033 mcasp->op_mode = pdata->op_mode;
1034 mcasp->tdm_slots = pdata->tdm_slots;
1035 mcasp->num_serializer = pdata->num_serializer;
1036 mcasp->serial_dir = pdata->serial_dir;
1037 mcasp->version = pdata->version;
1038 mcasp->txnumevt = pdata->txnumevt;
1039 mcasp->rxnumevt = pdata->rxnumevt;
1041 mcasp->dev = &pdev->dev;
1043 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1045 mcasp->dat_port = true;
1047 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1048 dma_data->asp_chan_q = pdata->asp_chan_q;
1049 dma_data->ram_chan_q = pdata->ram_chan_q;
1050 dma_data->sram_pool = pdata->sram_pool;
1051 dma_data->sram_size = pdata->sram_size_playback;
1053 dma_data->dma_addr = dat->start;
1055 dma_data->dma_addr = mem->start + pdata->tx_dma_offset;
1057 /* Unconditional dmaengine stuff */
1058 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr = dma_data->dma_addr;
1060 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1062 dma_data->channel = res->start;
1064 dma_data->channel = pdata->tx_dma_channel;
1066 dma_data = &mcasp->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1067 dma_data->asp_chan_q = pdata->asp_chan_q;
1068 dma_data->ram_chan_q = pdata->ram_chan_q;
1069 dma_data->sram_pool = pdata->sram_pool;
1070 dma_data->sram_size = pdata->sram_size_capture;
1072 dma_data->dma_addr = dat->start;
1074 dma_data->dma_addr = mem->start + pdata->rx_dma_offset;
1076 /* Unconditional dmaengine stuff */
1077 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr = dma_data->dma_addr;
1079 if (mcasp->version < MCASP_VERSION_3) {
1080 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1081 /* dma_data->dma_addr is pointing to the data port address */
1082 mcasp->dat_port = true;
1084 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1087 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1089 dma_data->channel = res->start;
1091 dma_data->channel = pdata->rx_dma_channel;
1093 /* Unconditional dmaengine stuff */
1094 mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data = "tx";
1095 mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data = "rx";
1097 dev_set_drvdata(&pdev->dev, mcasp);
1099 mcasp_reparent_fck(pdev);
1101 ret = snd_soc_register_component(&pdev->dev, &davinci_mcasp_component,
1102 &davinci_mcasp_dai[pdata->op_mode], 1);
1105 goto err_release_clk;
1107 if (mcasp->version != MCASP_VERSION_4) {
1108 ret = davinci_soc_platform_register(&pdev->dev);
1110 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1111 goto err_unregister_component;
1117 err_unregister_component:
1118 snd_soc_unregister_component(&pdev->dev);
1120 pm_runtime_put_sync(&pdev->dev);
1121 pm_runtime_disable(&pdev->dev);
1125 static int davinci_mcasp_remove(struct platform_device *pdev)
1127 struct davinci_mcasp *mcasp = dev_get_drvdata(&pdev->dev);
1129 snd_soc_unregister_component(&pdev->dev);
1130 if (mcasp->version != MCASP_VERSION_4)
1131 davinci_soc_platform_unregister(&pdev->dev);
1133 pm_runtime_put_sync(&pdev->dev);
1134 pm_runtime_disable(&pdev->dev);
1139 #ifdef CONFIG_PM_SLEEP
1140 static int davinci_mcasp_suspend(struct device *dev)
1142 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1144 mcasp->context.txfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG);
1145 mcasp->context.rxfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
1146 mcasp->context.txfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMT_REG);
1147 mcasp->context.rxfmt = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMT_REG);
1148 mcasp->context.aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
1149 mcasp->context.aclkrctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG);
1150 mcasp->context.pdir = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
1155 static int davinci_mcasp_resume(struct device *dev)
1157 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
1159 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, mcasp->context.txfmtctl);
1160 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG, mcasp->context.rxfmtctl);
1161 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMT_REG, mcasp->context.txfmt);
1162 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXFMT_REG, mcasp->context.rxfmt);
1163 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, mcasp->context.aclkxctl);
1164 mcasp_set_reg(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, mcasp->context.aclkrctl);
1165 mcasp_set_reg(mcasp, DAVINCI_MCASP_PDIR_REG, mcasp->context.pdir);
1171 SIMPLE_DEV_PM_OPS(davinci_mcasp_pm_ops,
1172 davinci_mcasp_suspend,
1173 davinci_mcasp_resume);
1175 static struct platform_driver davinci_mcasp_driver = {
1176 .probe = davinci_mcasp_probe,
1177 .remove = davinci_mcasp_remove,
1179 .name = "davinci-mcasp",
1180 .owner = THIS_MODULE,
1181 .pm = &davinci_mcasp_pm_ops,
1182 .of_match_table = mcasp_dt_ids,
1186 module_platform_driver(davinci_mcasp_driver);
1188 MODULE_AUTHOR("Steve Chen");
1189 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1190 MODULE_LICENSE("GPL");