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>
29 #include <linux/platform_data/davinci_asp.h>
30 #include <linux/math64.h>
32 #include <sound/asoundef.h>
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/initval.h>
37 #include <sound/soc.h>
38 #include <sound/dmaengine_pcm.h>
39 #include <sound/omap-pcm.h>
42 #include "davinci-mcasp.h"
44 #define MCASP_MAX_AFIFO_DEPTH 64
46 static u32 context_regs[] = {
47 DAVINCI_MCASP_TXFMCTL_REG,
48 DAVINCI_MCASP_RXFMCTL_REG,
49 DAVINCI_MCASP_TXFMT_REG,
50 DAVINCI_MCASP_RXFMT_REG,
51 DAVINCI_MCASP_ACLKXCTL_REG,
52 DAVINCI_MCASP_ACLKRCTL_REG,
53 DAVINCI_MCASP_AHCLKXCTL_REG,
54 DAVINCI_MCASP_AHCLKRCTL_REG,
55 DAVINCI_MCASP_PDIR_REG,
56 DAVINCI_MCASP_RXMASK_REG,
57 DAVINCI_MCASP_TXMASK_REG,
58 DAVINCI_MCASP_RXTDM_REG,
59 DAVINCI_MCASP_TXTDM_REG,
62 struct davinci_mcasp_context {
63 u32 config_regs[ARRAY_SIZE(context_regs)];
64 u32 afifo_regs[2]; /* for read/write fifo control registers */
65 u32 *xrsr_regs; /* for serializer configuration */
69 struct davinci_mcasp_ruledata {
70 struct davinci_mcasp *mcasp;
74 struct davinci_mcasp {
75 struct snd_dmaengine_dai_dma_data dma_data[2];
79 struct snd_pcm_substream *substreams[2];
81 /* McASP specific data */
96 /* McASP FIFO related */
102 /* Used for comstraint setting on the second stream */
105 #ifdef CONFIG_PM_SLEEP
106 struct davinci_mcasp_context context;
109 struct davinci_mcasp_ruledata ruledata[2];
110 struct snd_pcm_hw_constraint_list chconstr[2];
113 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
116 void __iomem *reg = mcasp->base + offset;
117 __raw_writel(__raw_readl(reg) | val, reg);
120 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
123 void __iomem *reg = mcasp->base + offset;
124 __raw_writel((__raw_readl(reg) & ~(val)), reg);
127 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
130 void __iomem *reg = mcasp->base + offset;
131 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
134 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
137 __raw_writel(val, mcasp->base + offset);
140 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
142 return (u32)__raw_readl(mcasp->base + offset);
145 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
149 mcasp_set_bits(mcasp, ctl_reg, val);
151 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
152 /* loop count is to avoid the lock-up */
153 for (i = 0; i < 1000; i++) {
154 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
158 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
159 printk(KERN_ERR "GBLCTL write error\n");
162 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
164 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
165 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
167 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
170 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
172 if (mcasp->rxnumevt) { /* enable FIFO */
173 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
175 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
176 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
180 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
181 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
183 * When ASYNC == 0 the transmit and receive sections operate
184 * synchronously from the transmit clock and frame sync. We need to make
185 * sure that the TX signlas are enabled when starting reception.
187 if (mcasp_is_synchronous(mcasp)) {
188 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
189 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
192 /* Activate serializer(s) */
193 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
194 /* Release RX state machine */
195 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
196 /* Release Frame Sync generator */
197 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
198 if (mcasp_is_synchronous(mcasp))
199 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
201 /* enable receive IRQs */
202 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
203 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
206 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
210 if (mcasp->txnumevt) { /* enable FIFO */
211 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
213 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
214 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
218 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
219 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
220 /* Activate serializer(s) */
221 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
223 /* wait for XDATA to be cleared */
225 while (!(mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) &
226 ~XRDATA) && (cnt < 100000))
229 /* Release TX state machine */
230 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
231 /* Release Frame Sync generator */
232 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
234 /* enable transmit IRQs */
235 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
236 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
239 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
243 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
244 mcasp_start_tx(mcasp);
246 mcasp_start_rx(mcasp);
249 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
251 /* disable IRQ sources */
252 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
253 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
256 * In synchronous mode stop the TX clocks if no other stream is
259 if (mcasp_is_synchronous(mcasp) && !mcasp->streams)
260 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
262 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
263 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
265 if (mcasp->rxnumevt) { /* disable FIFO */
266 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
268 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
272 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
276 /* disable IRQ sources */
277 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
278 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
281 * In synchronous mode keep TX clocks running if the capture stream is
284 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
285 val = TXHCLKRST | TXCLKRST | TXFSRST;
287 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
288 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
290 if (mcasp->txnumevt) { /* disable FIFO */
291 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
293 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
297 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
301 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
302 mcasp_stop_tx(mcasp);
304 mcasp_stop_rx(mcasp);
307 static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data)
309 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
310 struct snd_pcm_substream *substream;
311 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK];
312 u32 handled_mask = 0;
315 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG);
316 if (stat & XUNDRN & irq_mask) {
317 dev_warn(mcasp->dev, "Transmit buffer underflow\n");
318 handled_mask |= XUNDRN;
320 substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK];
322 snd_pcm_stream_lock_irq(substream);
323 if (snd_pcm_running(substream))
324 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
325 snd_pcm_stream_unlock_irq(substream);
330 dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n",
334 handled_mask |= XRERR;
336 /* Ack the handled event only */
337 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask);
339 return IRQ_RETVAL(handled_mask);
342 static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data)
344 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
345 struct snd_pcm_substream *substream;
346 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE];
347 u32 handled_mask = 0;
350 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG);
351 if (stat & ROVRN & irq_mask) {
352 dev_warn(mcasp->dev, "Receive buffer overflow\n");
353 handled_mask |= ROVRN;
355 substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE];
357 snd_pcm_stream_lock_irq(substream);
358 if (snd_pcm_running(substream))
359 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
360 snd_pcm_stream_unlock_irq(substream);
365 dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n",
369 handled_mask |= XRERR;
371 /* Ack the handled event only */
372 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask);
374 return IRQ_RETVAL(handled_mask);
377 static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data)
379 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
380 irqreturn_t ret = IRQ_NONE;
382 if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK])
383 ret = davinci_mcasp_tx_irq_handler(irq, data);
385 if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE])
386 ret |= davinci_mcasp_rx_irq_handler(irq, data);
391 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
394 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
400 pm_runtime_get_sync(mcasp->dev);
401 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
402 case SND_SOC_DAIFMT_DSP_A:
403 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
404 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
405 /* 1st data bit occur one ACLK cycle after the frame sync */
408 case SND_SOC_DAIFMT_DSP_B:
409 case SND_SOC_DAIFMT_AC97:
410 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
411 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
412 /* No delay after FS */
415 case SND_SOC_DAIFMT_I2S:
416 /* configure a full-word SYNC pulse (LRCLK) */
417 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
418 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
419 /* 1st data bit occur one ACLK cycle after the frame sync */
421 /* FS need to be inverted */
424 case SND_SOC_DAIFMT_LEFT_J:
425 /* configure a full-word SYNC pulse (LRCLK) */
426 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
427 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
428 /* No delay after FS */
436 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
438 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
441 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
442 case SND_SOC_DAIFMT_CBS_CFS:
443 /* codec is clock and frame slave */
444 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
445 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
447 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
448 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
450 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
451 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
452 mcasp->bclk_master = 1;
454 case SND_SOC_DAIFMT_CBS_CFM:
455 /* codec is clock slave and frame master */
456 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
457 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
459 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
460 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
462 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
463 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
464 mcasp->bclk_master = 1;
466 case SND_SOC_DAIFMT_CBM_CFS:
467 /* codec is clock master and frame slave */
468 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
469 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
471 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
472 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
474 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, ACLKX | ACLKR);
475 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AFSX | AFSR);
476 mcasp->bclk_master = 0;
478 case SND_SOC_DAIFMT_CBM_CFM:
479 /* codec is clock and frame master */
480 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
481 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
483 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
484 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
486 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG,
487 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
488 mcasp->bclk_master = 0;
495 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
496 case SND_SOC_DAIFMT_IB_NF:
497 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
498 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
499 fs_pol_rising = true;
501 case SND_SOC_DAIFMT_NB_IF:
502 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
503 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
504 fs_pol_rising = false;
506 case SND_SOC_DAIFMT_IB_IF:
507 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
508 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
509 fs_pol_rising = false;
511 case SND_SOC_DAIFMT_NB_NF:
512 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
513 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
514 fs_pol_rising = true;
522 fs_pol_rising = !fs_pol_rising;
525 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
526 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
528 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
529 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
532 pm_runtime_put(mcasp->dev);
536 static int __davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
537 int div, bool explicit)
539 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
541 pm_runtime_get_sync(mcasp->dev);
543 case 0: /* MCLK divider */
544 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
545 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
546 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
547 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
550 case 1: /* BCLK divider */
551 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
552 ACLKXDIV(div - 1), ACLKXDIV_MASK);
553 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
554 ACLKRDIV(div - 1), ACLKRDIV_MASK);
556 mcasp->bclk_div = div;
559 case 2: /* BCLK/LRCLK ratio */
560 mcasp->bclk_lrclk_ratio = div;
567 pm_runtime_put(mcasp->dev);
571 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
574 return __davinci_mcasp_set_clkdiv(dai, div_id, div, 1);
577 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
578 unsigned int freq, int dir)
580 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
582 pm_runtime_get_sync(mcasp->dev);
583 if (dir == SND_SOC_CLOCK_OUT) {
584 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
585 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
586 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
588 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
589 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
590 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AHCLKX);
593 mcasp->sysclk_freq = freq;
595 pm_runtime_put(mcasp->dev);
599 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
603 u32 tx_rotate = (word_length / 4) & 0x7;
604 u32 mask = (1ULL << word_length) - 1;
606 * For captured data we should not rotate, inversion and masking is
607 * enoguh to get the data to the right position:
608 * Format data from bus after reverse (XRBUF)
609 * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB|
610 * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
611 * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
612 * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB|
617 * if s BCLK-to-LRCLK ratio has been configured via the set_clkdiv()
618 * callback, take it into account here. That allows us to for example
619 * send 32 bits per channel to the codec, while only 16 of them carry
621 * The clock ratio is given for a full period of data (for I2S format
622 * both left and right channels), so it has to be divided by number of
623 * tdm-slots (for I2S - divided by 2).
625 if (mcasp->bclk_lrclk_ratio) {
626 u32 slot_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
629 * When we have more bclk then it is needed for the data, we
630 * need to use the rotation to move the received samples to have
633 rx_rotate = (slot_length - word_length) / 4;
634 word_length = slot_length;
637 /* mapping of the XSSZ bit-field as described in the datasheet */
638 fmt = (word_length >> 1) - 1;
640 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
641 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
643 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
645 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
647 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
649 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
652 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
657 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
658 int period_words, int channels)
660 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
664 u8 slots = mcasp->tdm_slots;
665 u8 max_active_serializers = (channels + slots - 1) / slots;
666 int active_serializers, numevt, n;
668 /* Default configuration */
669 if (mcasp->version < MCASP_VERSION_3)
670 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
672 /* All PINS as McASP */
673 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
675 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
676 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
677 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
679 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
680 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
683 for (i = 0; i < mcasp->num_serializer; i++) {
684 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
685 mcasp->serial_dir[i]);
686 if (mcasp->serial_dir[i] == TX_MODE &&
687 tx_ser < max_active_serializers) {
688 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
690 } else if (mcasp->serial_dir[i] == RX_MODE &&
691 rx_ser < max_active_serializers) {
692 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, AXR(i));
695 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
696 SRMOD_INACTIVE, SRMOD_MASK);
700 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
701 active_serializers = tx_ser;
702 numevt = mcasp->txnumevt;
703 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
705 active_serializers = rx_ser;
706 numevt = mcasp->rxnumevt;
707 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
710 if (active_serializers < max_active_serializers) {
711 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
712 "enabled in mcasp (%d)\n", channels,
713 active_serializers * slots);
717 /* AFIFO is not in use */
719 /* Configure the burst size for platform drivers */
720 if (active_serializers > 1) {
722 * If more than one serializers are in use we have one
723 * DMA request to provide data for all serializers.
724 * For example if three serializers are enabled the DMA
725 * need to transfer three words per DMA request.
727 dma_data->maxburst = active_serializers;
729 dma_data->maxburst = 0;
734 if (period_words % active_serializers) {
735 dev_err(mcasp->dev, "Invalid combination of period words and "
736 "active serializers: %d, %d\n", period_words,
742 * Calculate the optimal AFIFO depth for platform side:
743 * The number of words for numevt need to be in steps of active
746 n = numevt % active_serializers;
748 numevt += (active_serializers - n);
749 while (period_words % numevt && numevt > 0)
750 numevt -= active_serializers;
752 numevt = active_serializers;
754 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
755 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
757 /* Configure the burst size for platform drivers */
760 dma_data->maxburst = numevt;
765 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,
770 int active_serializers;
774 total_slots = mcasp->tdm_slots;
777 * If more than one serializer is needed, then use them with
778 * their specified tdm_slots count. Otherwise, one serializer
779 * can cope with the transaction using as many slots as channels
780 * in the stream, requires channels symmetry
782 active_serializers = (channels + total_slots - 1) / total_slots;
783 if (active_serializers == 1)
784 active_slots = channels;
786 active_slots = total_slots;
788 for (i = 0; i < active_slots; i++)
791 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
793 if (!mcasp->dat_port)
796 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
797 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
798 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
799 FSXMOD(total_slots), FSXMOD(0x1FF));
801 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
802 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
803 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
804 FSRMOD(total_slots), FSRMOD(0x1FF));
810 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
814 u8 *cs_bytes = (u8*) &cs_value;
816 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
818 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
820 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
821 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
823 /* Set the TX tdm : for all the slots */
824 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
826 /* Set the TX clock controls : div = 1 and internal */
827 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
829 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
831 /* Only 44100 and 48000 are valid, both have the same setting */
832 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
835 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
837 /* Set S/PDIF channel status bits */
838 cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
839 cs_bytes[1] = IEC958_AES1_CON_PCM_CODER;
843 cs_bytes[3] |= IEC958_AES3_CON_FS_22050;
846 cs_bytes[3] |= IEC958_AES3_CON_FS_24000;
849 cs_bytes[3] |= IEC958_AES3_CON_FS_32000;
852 cs_bytes[3] |= IEC958_AES3_CON_FS_44100;
855 cs_bytes[3] |= IEC958_AES3_CON_FS_48000;
858 cs_bytes[3] |= IEC958_AES3_CON_FS_88200;
861 cs_bytes[3] |= IEC958_AES3_CON_FS_96000;
864 cs_bytes[3] |= IEC958_AES3_CON_FS_176400;
867 cs_bytes[3] |= IEC958_AES3_CON_FS_192000;
870 printk(KERN_WARNING "unsupported sampling rate: %d\n", rate);
874 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value);
875 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value);
880 static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp,
881 unsigned int bclk_freq,
884 int div = mcasp->sysclk_freq / bclk_freq;
885 int rem = mcasp->sysclk_freq % bclk_freq;
889 ((mcasp->sysclk_freq / div) - bclk_freq) >
890 (bclk_freq - (mcasp->sysclk_freq / (div+1)))) {
892 rem = rem - bclk_freq;
897 (div*1000000 + (int)div64_long(1000000LL*rem,
904 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
905 struct snd_pcm_hw_params *params,
906 struct snd_soc_dai *cpu_dai)
908 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
910 int channels = params_channels(params);
911 int period_size = params_period_size(params);
915 * If mcasp is BCLK master, and a BCLK divider was not provided by
916 * the machine driver, we need to calculate the ratio.
918 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
919 int slots = mcasp->tdm_slots;
920 int rate = params_rate(params);
921 int sbits = params_width(params);
924 div = davinci_mcasp_calc_clk_div(mcasp, rate*sbits*slots,
927 dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n",
930 __davinci_mcasp_set_clkdiv(cpu_dai, 1, div, 0);
933 ret = mcasp_common_hw_param(mcasp, substream->stream,
934 period_size * channels, channels);
938 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
939 ret = mcasp_dit_hw_param(mcasp, params_rate(params));
941 ret = mcasp_i2s_hw_param(mcasp, substream->stream,
947 switch (params_format(params)) {
948 case SNDRV_PCM_FORMAT_U8:
949 case SNDRV_PCM_FORMAT_S8:
953 case SNDRV_PCM_FORMAT_U16_LE:
954 case SNDRV_PCM_FORMAT_S16_LE:
958 case SNDRV_PCM_FORMAT_U24_3LE:
959 case SNDRV_PCM_FORMAT_S24_3LE:
963 case SNDRV_PCM_FORMAT_U24_LE:
964 case SNDRV_PCM_FORMAT_S24_LE:
968 case SNDRV_PCM_FORMAT_U32_LE:
969 case SNDRV_PCM_FORMAT_S32_LE:
974 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
978 davinci_config_channel_size(mcasp, word_length);
980 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE)
981 mcasp->channels = channels;
986 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
987 int cmd, struct snd_soc_dai *cpu_dai)
989 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
993 case SNDRV_PCM_TRIGGER_RESUME:
994 case SNDRV_PCM_TRIGGER_START:
995 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
996 davinci_mcasp_start(mcasp, substream->stream);
998 case SNDRV_PCM_TRIGGER_SUSPEND:
999 case SNDRV_PCM_TRIGGER_STOP:
1000 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1001 davinci_mcasp_stop(mcasp, substream->stream);
1011 static const unsigned int davinci_mcasp_dai_rates[] = {
1012 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
1013 88200, 96000, 176400, 192000,
1016 #define DAVINCI_MAX_RATE_ERROR_PPM 1000
1018 static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
1019 struct snd_pcm_hw_rule *rule)
1021 struct davinci_mcasp_ruledata *rd = rule->private;
1022 struct snd_interval *ri =
1023 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1024 int sbits = params_width(params);
1025 int slots = rd->mcasp->tdm_slots;
1026 struct snd_interval range;
1029 snd_interval_any(&range);
1032 for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) {
1033 if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) {
1034 uint bclk_freq = sbits*slots*
1035 davinci_mcasp_dai_rates[i];
1038 davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, &ppm);
1039 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1041 range.min = davinci_mcasp_dai_rates[i];
1044 range.max = davinci_mcasp_dai_rates[i];
1049 dev_dbg(rd->mcasp->dev,
1050 "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n",
1051 ri->min, ri->max, range.min, range.max, sbits, slots);
1053 return snd_interval_refine(hw_param_interval(params, rule->var),
1057 static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
1058 struct snd_pcm_hw_rule *rule)
1060 struct davinci_mcasp_ruledata *rd = rule->private;
1061 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1062 struct snd_mask nfmt;
1063 int rate = params_rate(params);
1064 int slots = rd->mcasp->tdm_slots;
1067 snd_mask_none(&nfmt);
1069 for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
1070 if (snd_mask_test(fmt, i)) {
1071 uint bclk_freq = snd_pcm_format_width(i)*slots*rate;
1074 davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq, &ppm);
1075 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1076 snd_mask_set(&nfmt, i);
1081 dev_dbg(rd->mcasp->dev,
1082 "%d possible sample format for %d Hz and %d tdm slots\n",
1083 count, rate, slots);
1085 return snd_mask_refine(fmt, &nfmt);
1088 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
1089 struct snd_soc_dai *cpu_dai)
1091 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1092 struct davinci_mcasp_ruledata *ruledata =
1093 &mcasp->ruledata[substream->stream];
1094 u32 max_channels = 0;
1097 mcasp->substreams[substream->stream] = substream;
1099 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1103 * Limit the maximum allowed channels for the first stream:
1104 * number of serializers for the direction * tdm slots per serializer
1106 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1111 for (i = 0; i < mcasp->num_serializer; i++) {
1112 if (mcasp->serial_dir[i] == dir)
1115 ruledata->serializers = max_channels;
1116 max_channels *= mcasp->tdm_slots;
1118 * If the already active stream has less channels than the calculated
1119 * limnit based on the seirializers * tdm_slots, we need to use that as
1120 * a constraint for the second stream.
1121 * Otherwise (first stream or less allowed channels) we use the
1122 * calculated constraint.
1124 if (mcasp->channels && mcasp->channels < max_channels)
1125 max_channels = mcasp->channels;
1127 snd_pcm_hw_constraint_minmax(substream->runtime,
1128 SNDRV_PCM_HW_PARAM_CHANNELS,
1131 if (mcasp->chconstr[substream->stream].count)
1132 snd_pcm_hw_constraint_list(substream->runtime,
1133 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1134 &mcasp->chconstr[substream->stream]);
1137 * If we rely on implicit BCLK divider setting we should
1138 * set constraints based on what we can provide.
1140 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1143 ruledata->mcasp = mcasp;
1145 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1146 SNDRV_PCM_HW_PARAM_RATE,
1147 davinci_mcasp_hw_rule_rate,
1149 SNDRV_PCM_HW_PARAM_FORMAT, -1);
1152 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1153 SNDRV_PCM_HW_PARAM_FORMAT,
1154 davinci_mcasp_hw_rule_format,
1156 SNDRV_PCM_HW_PARAM_RATE, -1);
1164 static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream,
1165 struct snd_soc_dai *cpu_dai)
1167 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1169 mcasp->substreams[substream->stream] = NULL;
1171 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1174 if (!cpu_dai->active)
1175 mcasp->channels = 0;
1178 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
1179 .startup = davinci_mcasp_startup,
1180 .shutdown = davinci_mcasp_shutdown,
1181 .trigger = davinci_mcasp_trigger,
1182 .hw_params = davinci_mcasp_hw_params,
1183 .set_fmt = davinci_mcasp_set_dai_fmt,
1184 .set_clkdiv = davinci_mcasp_set_clkdiv,
1185 .set_sysclk = davinci_mcasp_set_sysclk,
1188 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
1190 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1192 dai->playback_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1193 dai->capture_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1198 #ifdef CONFIG_PM_SLEEP
1199 static int davinci_mcasp_suspend(struct snd_soc_dai *dai)
1201 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1202 struct davinci_mcasp_context *context = &mcasp->context;
1206 context->pm_state = pm_runtime_active(mcasp->dev);
1207 if (!context->pm_state)
1208 pm_runtime_get_sync(mcasp->dev);
1210 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
1211 context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);
1213 if (mcasp->txnumevt) {
1214 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
1215 context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);
1217 if (mcasp->rxnumevt) {
1218 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
1219 context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);
1222 for (i = 0; i < mcasp->num_serializer; i++)
1223 context->xrsr_regs[i] = mcasp_get_reg(mcasp,
1224 DAVINCI_MCASP_XRSRCTL_REG(i));
1226 pm_runtime_put_sync(mcasp->dev);
1231 static int davinci_mcasp_resume(struct snd_soc_dai *dai)
1233 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1234 struct davinci_mcasp_context *context = &mcasp->context;
1238 pm_runtime_get_sync(mcasp->dev);
1240 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
1241 mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);
1243 if (mcasp->txnumevt) {
1244 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
1245 mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);
1247 if (mcasp->rxnumevt) {
1248 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
1249 mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);
1252 for (i = 0; i < mcasp->num_serializer; i++)
1253 mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
1254 context->xrsr_regs[i]);
1256 if (!context->pm_state)
1257 pm_runtime_put_sync(mcasp->dev);
1262 #define davinci_mcasp_suspend NULL
1263 #define davinci_mcasp_resume NULL
1266 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
1268 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1269 SNDRV_PCM_FMTBIT_U8 | \
1270 SNDRV_PCM_FMTBIT_S16_LE | \
1271 SNDRV_PCM_FMTBIT_U16_LE | \
1272 SNDRV_PCM_FMTBIT_S24_LE | \
1273 SNDRV_PCM_FMTBIT_U24_LE | \
1274 SNDRV_PCM_FMTBIT_S24_3LE | \
1275 SNDRV_PCM_FMTBIT_U24_3LE | \
1276 SNDRV_PCM_FMTBIT_S32_LE | \
1277 SNDRV_PCM_FMTBIT_U32_LE)
1279 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
1281 .name = "davinci-mcasp.0",
1282 .probe = davinci_mcasp_dai_probe,
1283 .suspend = davinci_mcasp_suspend,
1284 .resume = davinci_mcasp_resume,
1287 .channels_max = 32 * 16,
1288 .rates = DAVINCI_MCASP_RATES,
1289 .formats = DAVINCI_MCASP_PCM_FMTS,
1293 .channels_max = 32 * 16,
1294 .rates = DAVINCI_MCASP_RATES,
1295 .formats = DAVINCI_MCASP_PCM_FMTS,
1297 .ops = &davinci_mcasp_dai_ops,
1299 .symmetric_samplebits = 1,
1302 .name = "davinci-mcasp.1",
1303 .probe = davinci_mcasp_dai_probe,
1306 .channels_max = 384,
1307 .rates = DAVINCI_MCASP_RATES,
1308 .formats = DAVINCI_MCASP_PCM_FMTS,
1310 .ops = &davinci_mcasp_dai_ops,
1315 static const struct snd_soc_component_driver davinci_mcasp_component = {
1316 .name = "davinci-mcasp",
1319 /* Some HW specific values and defaults. The rest is filled in from DT. */
1320 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
1321 .tx_dma_offset = 0x400,
1322 .rx_dma_offset = 0x400,
1323 .version = MCASP_VERSION_1,
1326 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
1327 .tx_dma_offset = 0x2000,
1328 .rx_dma_offset = 0x2000,
1329 .version = MCASP_VERSION_2,
1332 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
1335 .version = MCASP_VERSION_3,
1338 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
1339 .tx_dma_offset = 0x200,
1340 .rx_dma_offset = 0x284,
1341 .version = MCASP_VERSION_4,
1344 static const struct of_device_id mcasp_dt_ids[] = {
1346 .compatible = "ti,dm646x-mcasp-audio",
1347 .data = &dm646x_mcasp_pdata,
1350 .compatible = "ti,da830-mcasp-audio",
1351 .data = &da830_mcasp_pdata,
1354 .compatible = "ti,am33xx-mcasp-audio",
1355 .data = &am33xx_mcasp_pdata,
1358 .compatible = "ti,dra7-mcasp-audio",
1359 .data = &dra7_mcasp_pdata,
1363 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1365 static int mcasp_reparent_fck(struct platform_device *pdev)
1367 struct device_node *node = pdev->dev.of_node;
1368 struct clk *gfclk, *parent_clk;
1369 const char *parent_name;
1375 parent_name = of_get_property(node, "fck_parent", NULL);
1379 gfclk = clk_get(&pdev->dev, "fck");
1380 if (IS_ERR(gfclk)) {
1381 dev_err(&pdev->dev, "failed to get fck\n");
1382 return PTR_ERR(gfclk);
1385 parent_clk = clk_get(NULL, parent_name);
1386 if (IS_ERR(parent_clk)) {
1387 dev_err(&pdev->dev, "failed to get parent clock\n");
1388 ret = PTR_ERR(parent_clk);
1392 ret = clk_set_parent(gfclk, parent_clk);
1394 dev_err(&pdev->dev, "failed to reparent fck\n");
1399 clk_put(parent_clk);
1405 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
1406 struct platform_device *pdev)
1408 struct device_node *np = pdev->dev.of_node;
1409 struct davinci_mcasp_pdata *pdata = NULL;
1410 const struct of_device_id *match =
1411 of_match_device(mcasp_dt_ids, &pdev->dev);
1412 struct of_phandle_args dma_spec;
1414 const u32 *of_serial_dir32;
1418 if (pdev->dev.platform_data) {
1419 pdata = pdev->dev.platform_data;
1422 pdata = (struct davinci_mcasp_pdata*) match->data;
1424 /* control shouldn't reach here. something is wrong */
1429 ret = of_property_read_u32(np, "op-mode", &val);
1431 pdata->op_mode = val;
1433 ret = of_property_read_u32(np, "tdm-slots", &val);
1435 if (val < 2 || val > 32) {
1437 "tdm-slots must be in rage [2-32]\n");
1442 pdata->tdm_slots = val;
1445 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1447 if (of_serial_dir32) {
1448 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1449 (sizeof(*of_serial_dir) * val),
1451 if (!of_serial_dir) {
1456 for (i = 0; i < val; i++)
1457 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1459 pdata->num_serializer = val;
1460 pdata->serial_dir = of_serial_dir;
1463 ret = of_property_match_string(np, "dma-names", "tx");
1467 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1472 pdata->tx_dma_channel = dma_spec.args[0];
1474 /* RX is not valid in DIT mode */
1475 if (pdata->op_mode != DAVINCI_MCASP_DIT_MODE) {
1476 ret = of_property_match_string(np, "dma-names", "rx");
1480 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1485 pdata->rx_dma_channel = dma_spec.args[0];
1488 ret = of_property_read_u32(np, "tx-num-evt", &val);
1490 pdata->txnumevt = val;
1492 ret = of_property_read_u32(np, "rx-num-evt", &val);
1494 pdata->rxnumevt = val;
1496 ret = of_property_read_u32(np, "sram-size-playback", &val);
1498 pdata->sram_size_playback = val;
1500 ret = of_property_read_u32(np, "sram-size-capture", &val);
1502 pdata->sram_size_capture = val;
1508 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1515 /* All serializers must have equal number of channels */
1516 static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp,
1517 struct snd_pcm_hw_constraint_list *cl,
1523 if (serializers <= 1)
1526 list = devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
1527 (mcasp->tdm_slots + serializers - 2),
1532 for (i = 2; i <= mcasp->tdm_slots; i++)
1535 for (i = 2; i <= serializers; i++)
1536 list[count++] = i*mcasp->tdm_slots;
1545 static int davinci_mcasp_init_ch_constraints(struct davinci_mcasp *mcasp)
1547 int rx_serializers = 0, tx_serializers = 0, ret, i;
1549 for (i = 0; i < mcasp->num_serializer; i++)
1550 if (mcasp->serial_dir[i] == TX_MODE)
1552 else if (mcasp->serial_dir[i] == RX_MODE)
1555 ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[
1556 SNDRV_PCM_STREAM_PLAYBACK],
1561 ret = davinci_mcasp_ch_constraint(mcasp, &mcasp->chconstr[
1562 SNDRV_PCM_STREAM_CAPTURE],
1568 static int davinci_mcasp_probe(struct platform_device *pdev)
1570 struct snd_dmaengine_dai_dma_data *dma_data;
1571 struct resource *mem, *ioarea, *res, *dat;
1572 struct davinci_mcasp_pdata *pdata;
1573 struct davinci_mcasp *mcasp;
1579 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
1580 dev_err(&pdev->dev, "No platform data supplied\n");
1584 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
1589 pdata = davinci_mcasp_set_pdata_from_of(pdev);
1591 dev_err(&pdev->dev, "no platform data\n");
1595 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1597 dev_warn(mcasp->dev,
1598 "\"mpu\" mem resource not found, using index 0\n");
1599 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1601 dev_err(&pdev->dev, "no mem resource?\n");
1606 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
1607 resource_size(mem), pdev->name);
1609 dev_err(&pdev->dev, "Audio region already claimed\n");
1613 pm_runtime_enable(&pdev->dev);
1615 mcasp->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
1617 dev_err(&pdev->dev, "ioremap failed\n");
1622 mcasp->op_mode = pdata->op_mode;
1623 /* sanity check for tdm slots parameter */
1624 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) {
1625 if (pdata->tdm_slots < 2) {
1626 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
1628 mcasp->tdm_slots = 2;
1629 } else if (pdata->tdm_slots > 32) {
1630 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
1632 mcasp->tdm_slots = 32;
1634 mcasp->tdm_slots = pdata->tdm_slots;
1638 mcasp->num_serializer = pdata->num_serializer;
1639 #ifdef CONFIG_PM_SLEEP
1640 mcasp->context.xrsr_regs = devm_kzalloc(&pdev->dev,
1641 sizeof(u32) * mcasp->num_serializer,
1644 mcasp->serial_dir = pdata->serial_dir;
1645 mcasp->version = pdata->version;
1646 mcasp->txnumevt = pdata->txnumevt;
1647 mcasp->rxnumevt = pdata->rxnumevt;
1649 mcasp->dev = &pdev->dev;
1651 irq = platform_get_irq_byname(pdev, "common");
1653 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common\n",
1654 dev_name(&pdev->dev));
1655 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1656 davinci_mcasp_common_irq_handler,
1657 IRQF_ONESHOT | IRQF_SHARED,
1660 dev_err(&pdev->dev, "common IRQ request failed\n");
1664 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
1665 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
1668 irq = platform_get_irq_byname(pdev, "rx");
1670 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx\n",
1671 dev_name(&pdev->dev));
1672 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1673 davinci_mcasp_rx_irq_handler,
1674 IRQF_ONESHOT, irq_name, mcasp);
1676 dev_err(&pdev->dev, "RX IRQ request failed\n");
1680 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
1683 irq = platform_get_irq_byname(pdev, "tx");
1685 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx\n",
1686 dev_name(&pdev->dev));
1687 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1688 davinci_mcasp_tx_irq_handler,
1689 IRQF_ONESHOT, irq_name, mcasp);
1691 dev_err(&pdev->dev, "TX IRQ request failed\n");
1695 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
1698 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
1700 mcasp->dat_port = true;
1702 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1704 dma_data->addr = dat->start;
1706 dma_data->addr = mem->start + pdata->tx_dma_offset;
1708 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
1709 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1713 *dma = pdata->tx_dma_channel;
1715 /* dmaengine filter data for DT and non-DT boot */
1716 if (pdev->dev.of_node)
1717 dma_data->filter_data = "tx";
1719 dma_data->filter_data = dma;
1721 /* RX is not valid in DIT mode */
1722 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
1723 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1725 dma_data->addr = dat->start;
1727 dma_data->addr = mem->start + pdata->rx_dma_offset;
1729 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_CAPTURE];
1730 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1734 *dma = pdata->rx_dma_channel;
1736 /* dmaengine filter data for DT and non-DT boot */
1737 if (pdev->dev.of_node)
1738 dma_data->filter_data = "rx";
1740 dma_data->filter_data = dma;
1743 if (mcasp->version < MCASP_VERSION_3) {
1744 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
1745 /* dma_params->dma_addr is pointing to the data port address */
1746 mcasp->dat_port = true;
1748 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
1751 ret = davinci_mcasp_init_ch_constraints(mcasp);
1755 dev_set_drvdata(&pdev->dev, mcasp);
1757 mcasp_reparent_fck(pdev);
1759 ret = devm_snd_soc_register_component(&pdev->dev,
1760 &davinci_mcasp_component,
1761 &davinci_mcasp_dai[pdata->op_mode], 1);
1766 switch (mcasp->version) {
1767 #if IS_BUILTIN(CONFIG_SND_EDMA_SOC) || \
1768 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1769 IS_MODULE(CONFIG_SND_EDMA_SOC))
1770 case MCASP_VERSION_1:
1771 case MCASP_VERSION_2:
1772 case MCASP_VERSION_3:
1773 ret = edma_pcm_platform_register(&pdev->dev);
1776 #if IS_BUILTIN(CONFIG_SND_OMAP_SOC) || \
1777 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
1778 IS_MODULE(CONFIG_SND_OMAP_SOC))
1779 case MCASP_VERSION_4:
1780 ret = omap_pcm_platform_register(&pdev->dev);
1784 dev_err(&pdev->dev, "Invalid McASP version: %d\n",
1791 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1798 pm_runtime_disable(&pdev->dev);
1802 static int davinci_mcasp_remove(struct platform_device *pdev)
1804 pm_runtime_disable(&pdev->dev);
1809 static struct platform_driver davinci_mcasp_driver = {
1810 .probe = davinci_mcasp_probe,
1811 .remove = davinci_mcasp_remove,
1813 .name = "davinci-mcasp",
1814 .of_match_table = mcasp_dt_ids,
1818 module_platform_driver(davinci_mcasp_driver);
1820 MODULE_AUTHOR("Steve Chen");
1821 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1822 MODULE_LICENSE("GPL");