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>
31 #include <linux/bitmap.h>
33 #include <sound/asoundef.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/initval.h>
38 #include <sound/soc.h>
39 #include <sound/dmaengine_pcm.h>
42 #include "../omap/sdma-pcm.h"
43 #include "davinci-mcasp.h"
45 #define MCASP_MAX_AFIFO_DEPTH 64
47 static u32 context_regs[] = {
48 DAVINCI_MCASP_TXFMCTL_REG,
49 DAVINCI_MCASP_RXFMCTL_REG,
50 DAVINCI_MCASP_TXFMT_REG,
51 DAVINCI_MCASP_RXFMT_REG,
52 DAVINCI_MCASP_ACLKXCTL_REG,
53 DAVINCI_MCASP_ACLKRCTL_REG,
54 DAVINCI_MCASP_AHCLKXCTL_REG,
55 DAVINCI_MCASP_AHCLKRCTL_REG,
56 DAVINCI_MCASP_PDIR_REG,
57 DAVINCI_MCASP_RXMASK_REG,
58 DAVINCI_MCASP_TXMASK_REG,
59 DAVINCI_MCASP_RXTDM_REG,
60 DAVINCI_MCASP_TXTDM_REG,
63 struct davinci_mcasp_context {
64 u32 config_regs[ARRAY_SIZE(context_regs)];
65 u32 afifo_regs[2]; /* for read/write fifo control registers */
66 u32 *xrsr_regs; /* for serializer configuration */
70 struct davinci_mcasp_ruledata {
71 struct davinci_mcasp *mcasp;
75 struct davinci_mcasp {
76 struct snd_dmaengine_dai_dma_data dma_data[2];
80 struct snd_pcm_substream *substreams[2];
83 /* McASP specific data */
99 unsigned long pdir; /* Pin direction bitfield */
101 /* McASP FIFO related */
107 /* Used for comstraint setting on the second stream */
110 #ifdef CONFIG_PM_SLEEP
111 struct davinci_mcasp_context context;
114 struct davinci_mcasp_ruledata ruledata[2];
115 struct snd_pcm_hw_constraint_list chconstr[2];
118 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
121 void __iomem *reg = mcasp->base + offset;
122 __raw_writel(__raw_readl(reg) | val, reg);
125 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
128 void __iomem *reg = mcasp->base + offset;
129 __raw_writel((__raw_readl(reg) & ~(val)), reg);
132 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
135 void __iomem *reg = mcasp->base + offset;
136 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
139 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
142 __raw_writel(val, mcasp->base + offset);
145 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
147 return (u32)__raw_readl(mcasp->base + offset);
150 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
154 mcasp_set_bits(mcasp, ctl_reg, val);
156 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
157 /* loop count is to avoid the lock-up */
158 for (i = 0; i < 1000; i++) {
159 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
163 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
164 printk(KERN_ERR "GBLCTL write error\n");
167 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
169 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
170 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
172 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
175 static inline void mcasp_set_clk_pdir(struct davinci_mcasp *mcasp, bool enable)
177 u32 bit = PIN_BIT_AMUTE;
179 for_each_set_bit_from(bit, &mcasp->pdir, PIN_BIT_AFSR + 1) {
181 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
183 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
187 static inline void mcasp_set_axr_pdir(struct davinci_mcasp *mcasp, bool enable)
191 for_each_set_bit(bit, &mcasp->pdir, PIN_BIT_AFSR) {
193 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
195 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
199 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
201 if (mcasp->rxnumevt) { /* enable FIFO */
202 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
204 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
205 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
209 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
210 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
212 * When ASYNC == 0 the transmit and receive sections operate
213 * synchronously from the transmit clock and frame sync. We need to make
214 * sure that the TX signlas are enabled when starting reception.
216 if (mcasp_is_synchronous(mcasp)) {
217 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
218 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
221 /* Activate serializer(s) */
222 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
223 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
224 /* Release RX state machine */
225 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
226 /* Release Frame Sync generator */
227 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
228 if (mcasp_is_synchronous(mcasp))
229 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
231 /* enable receive IRQs */
232 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
233 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
236 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
240 if (mcasp->txnumevt) { /* enable FIFO */
241 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
243 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
244 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
248 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
249 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
250 mcasp_set_clk_pdir(mcasp, true);
252 /* Activate serializer(s) */
253 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
254 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
256 /* wait for XDATA to be cleared */
258 while ((mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) & XRDATA) &&
262 mcasp_set_axr_pdir(mcasp, true);
264 /* Release TX state machine */
265 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
266 /* Release Frame Sync generator */
267 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
269 /* enable transmit IRQs */
270 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
271 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
274 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
278 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
279 mcasp_start_tx(mcasp);
281 mcasp_start_rx(mcasp);
284 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
286 /* disable IRQ sources */
287 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
288 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
291 * In synchronous mode stop the TX clocks if no other stream is
294 if (mcasp_is_synchronous(mcasp) && !mcasp->streams) {
295 mcasp_set_clk_pdir(mcasp, false);
296 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
299 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
300 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
302 if (mcasp->rxnumevt) { /* disable FIFO */
303 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
305 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
309 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
313 /* disable IRQ sources */
314 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
315 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
318 * In synchronous mode keep TX clocks running if the capture stream is
321 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
322 val = TXHCLKRST | TXCLKRST | TXFSRST;
324 mcasp_set_clk_pdir(mcasp, false);
327 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
328 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
330 if (mcasp->txnumevt) { /* disable FIFO */
331 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
333 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
336 mcasp_set_axr_pdir(mcasp, false);
339 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
343 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
344 mcasp_stop_tx(mcasp);
346 mcasp_stop_rx(mcasp);
349 static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data)
351 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
352 struct snd_pcm_substream *substream;
353 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK];
354 u32 handled_mask = 0;
357 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG);
358 if (stat & XUNDRN & irq_mask) {
359 dev_warn(mcasp->dev, "Transmit buffer underflow\n");
360 handled_mask |= XUNDRN;
362 substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK];
364 snd_pcm_stop_xrun(substream);
368 dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n",
372 handled_mask |= XRERR;
374 /* Ack the handled event only */
375 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask);
377 return IRQ_RETVAL(handled_mask);
380 static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data)
382 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
383 struct snd_pcm_substream *substream;
384 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE];
385 u32 handled_mask = 0;
388 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG);
389 if (stat & ROVRN & irq_mask) {
390 dev_warn(mcasp->dev, "Receive buffer overflow\n");
391 handled_mask |= ROVRN;
393 substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE];
395 snd_pcm_stop_xrun(substream);
399 dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n",
403 handled_mask |= XRERR;
405 /* Ack the handled event only */
406 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask);
408 return IRQ_RETVAL(handled_mask);
411 static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data)
413 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
414 irqreturn_t ret = IRQ_NONE;
416 if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK])
417 ret = davinci_mcasp_tx_irq_handler(irq, data);
419 if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE])
420 ret |= davinci_mcasp_rx_irq_handler(irq, data);
425 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
428 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
437 pm_runtime_get_sync(mcasp->dev);
438 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
439 case SND_SOC_DAIFMT_DSP_A:
440 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
441 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
442 /* 1st data bit occur one ACLK cycle after the frame sync */
445 case SND_SOC_DAIFMT_DSP_B:
446 case SND_SOC_DAIFMT_AC97:
447 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
448 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
449 /* No delay after FS */
452 case SND_SOC_DAIFMT_I2S:
453 /* configure a full-word SYNC pulse (LRCLK) */
454 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
455 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
456 /* 1st data bit occur one ACLK cycle after the frame sync */
458 /* FS need to be inverted */
461 case SND_SOC_DAIFMT_LEFT_J:
462 /* configure a full-word SYNC pulse (LRCLK) */
463 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
464 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
465 /* No delay after FS */
473 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
475 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
478 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
479 case SND_SOC_DAIFMT_CBS_CFS:
480 /* codec is clock and frame slave */
481 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
482 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
484 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
485 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
488 set_bit(PIN_BIT_ACLKX, &mcasp->pdir);
489 set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
491 set_bit(PIN_BIT_AFSX, &mcasp->pdir);
492 set_bit(PIN_BIT_AFSR, &mcasp->pdir);
494 mcasp->bclk_master = 1;
496 case SND_SOC_DAIFMT_CBS_CFM:
497 /* codec is clock slave and frame master */
498 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
499 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
501 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
502 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
505 set_bit(PIN_BIT_ACLKX, &mcasp->pdir);
506 set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
508 clear_bit(PIN_BIT_AFSX, &mcasp->pdir);
509 clear_bit(PIN_BIT_AFSR, &mcasp->pdir);
511 mcasp->bclk_master = 1;
513 case SND_SOC_DAIFMT_CBM_CFS:
514 /* codec is clock master and frame slave */
515 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
516 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
518 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
519 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
522 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir);
523 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
525 set_bit(PIN_BIT_AFSX, &mcasp->pdir);
526 set_bit(PIN_BIT_AFSR, &mcasp->pdir);
528 mcasp->bclk_master = 0;
530 case SND_SOC_DAIFMT_CBM_CFM:
531 /* codec is clock and frame master */
532 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
533 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
535 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
536 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
539 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir);
540 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
542 clear_bit(PIN_BIT_AFSX, &mcasp->pdir);
543 clear_bit(PIN_BIT_AFSR, &mcasp->pdir);
545 mcasp->bclk_master = 0;
552 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
553 case SND_SOC_DAIFMT_IB_NF:
554 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
555 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
556 fs_pol_rising = true;
558 case SND_SOC_DAIFMT_NB_IF:
559 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
560 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
561 fs_pol_rising = false;
563 case SND_SOC_DAIFMT_IB_IF:
564 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
565 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
566 fs_pol_rising = false;
568 case SND_SOC_DAIFMT_NB_NF:
569 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
570 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
571 fs_pol_rising = true;
579 fs_pol_rising = !fs_pol_rising;
582 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
583 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
585 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
586 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
589 mcasp->dai_fmt = fmt;
591 pm_runtime_put(mcasp->dev);
595 static int __davinci_mcasp_set_clkdiv(struct davinci_mcasp *mcasp, int div_id,
596 int div, bool explicit)
598 pm_runtime_get_sync(mcasp->dev);
600 case MCASP_CLKDIV_AUXCLK: /* MCLK divider */
601 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
602 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
603 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
604 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
607 case MCASP_CLKDIV_BCLK: /* BCLK divider */
608 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
609 ACLKXDIV(div - 1), ACLKXDIV_MASK);
610 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
611 ACLKRDIV(div - 1), ACLKRDIV_MASK);
613 mcasp->bclk_div = div;
616 case MCASP_CLKDIV_BCLK_FS_RATIO:
618 * BCLK/LRCLK ratio descries how many bit-clock cycles
619 * fit into one frame. The clock ratio is given for a
620 * full period of data (for I2S format both left and
621 * right channels), so it has to be divided by number
622 * of tdm-slots (for I2S - divided by 2).
623 * Instead of storing this ratio, we calculate a new
624 * tdm_slot width by dividing the the ratio by the
625 * number of configured tdm slots.
627 mcasp->slot_width = div / mcasp->tdm_slots;
628 if (div % mcasp->tdm_slots)
630 "%s(): BCLK/LRCLK %d is not divisible by %d tdm slots",
631 __func__, div, mcasp->tdm_slots);
638 pm_runtime_put(mcasp->dev);
642 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
645 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
647 return __davinci_mcasp_set_clkdiv(mcasp, div_id, div, 1);
650 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
651 unsigned int freq, int dir)
653 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
655 pm_runtime_get_sync(mcasp->dev);
656 if (dir == SND_SOC_CLOCK_OUT) {
657 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
658 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
659 set_bit(PIN_BIT_AHCLKX, &mcasp->pdir);
661 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
662 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
663 clear_bit(PIN_BIT_AHCLKX, &mcasp->pdir);
666 mcasp->sysclk_freq = freq;
668 pm_runtime_put(mcasp->dev);
672 /* All serializers must have equal number of channels */
673 static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream,
676 struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream];
677 unsigned int *list = (unsigned int *) cl->list;
678 int slots = mcasp->tdm_slots;
681 if (mcasp->tdm_mask[stream])
682 slots = hweight32(mcasp->tdm_mask[stream]);
684 for (i = 1; i <= slots; i++)
687 for (i = 2; i <= serializers; i++)
688 list[count++] = i*slots;
695 static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp)
697 int rx_serializers = 0, tx_serializers = 0, ret, i;
699 for (i = 0; i < mcasp->num_serializer; i++)
700 if (mcasp->serial_dir[i] == TX_MODE)
702 else if (mcasp->serial_dir[i] == RX_MODE)
705 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK,
710 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE,
717 static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai,
718 unsigned int tx_mask,
719 unsigned int rx_mask,
720 int slots, int slot_width)
722 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
725 "%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n",
726 __func__, tx_mask, rx_mask, slots, slot_width);
728 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
730 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
731 tx_mask, rx_mask, slots);
736 (slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) {
737 dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n",
738 __func__, slot_width);
742 mcasp->tdm_slots = slots;
743 mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
744 mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
745 mcasp->slot_width = slot_width;
747 return davinci_mcasp_set_ch_constraints(mcasp);
750 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
754 u32 tx_rotate = (sample_width / 4) & 0x7;
755 u32 mask = (1ULL << sample_width) - 1;
756 u32 slot_width = sample_width;
759 * For captured data we should not rotate, inversion and masking is
760 * enoguh to get the data to the right position:
761 * Format data from bus after reverse (XRBUF)
762 * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB|
763 * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
764 * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
765 * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB|
770 * Setting the tdm slot width either with set_clkdiv() or
771 * set_tdm_slot() allows us to for example send 32 bits per
772 * channel to the codec, while only 16 of them carry audio
775 if (mcasp->slot_width) {
777 * When we have more bclk then it is needed for the
778 * data, we need to use the rotation to move the
779 * received samples to have correct alignment.
781 slot_width = mcasp->slot_width;
782 rx_rotate = (slot_width - sample_width) / 4;
785 /* mapping of the XSSZ bit-field as described in the datasheet */
786 fmt = (slot_width >> 1) - 1;
788 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
789 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
791 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
793 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
795 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
797 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
800 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
805 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
806 int period_words, int channels)
808 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
812 u8 slots = mcasp->tdm_slots;
813 u8 max_active_serializers = (channels + slots - 1) / slots;
814 int active_serializers, numevt;
816 /* Default configuration */
817 if (mcasp->version < MCASP_VERSION_3)
818 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
820 /* All PINS as McASP */
821 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
823 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
824 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
825 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
827 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
828 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
831 for (i = 0; i < mcasp->num_serializer; i++) {
832 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
833 mcasp->serial_dir[i]);
834 if (mcasp->serial_dir[i] == TX_MODE &&
835 tx_ser < max_active_serializers) {
836 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
837 DISMOD_LOW, DISMOD_MASK);
838 set_bit(PIN_BIT_AXR(i), &mcasp->pdir);
840 } else if (mcasp->serial_dir[i] == RX_MODE &&
841 rx_ser < max_active_serializers) {
842 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
844 } else if (mcasp->serial_dir[i] == INACTIVE_MODE) {
845 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
846 SRMOD_INACTIVE, SRMOD_MASK);
847 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
848 } else if (mcasp->serial_dir[i] == TX_MODE) {
849 /* Unused TX pins, clear PDIR */
850 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
854 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
855 active_serializers = tx_ser;
856 numevt = mcasp->txnumevt;
857 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
859 active_serializers = rx_ser;
860 numevt = mcasp->rxnumevt;
861 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
864 if (active_serializers < max_active_serializers) {
865 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
866 "enabled in mcasp (%d)\n", channels,
867 active_serializers * slots);
871 /* AFIFO is not in use */
873 /* Configure the burst size for platform drivers */
874 if (active_serializers > 1) {
876 * If more than one serializers are in use we have one
877 * DMA request to provide data for all serializers.
878 * For example if three serializers are enabled the DMA
879 * need to transfer three words per DMA request.
881 dma_data->maxburst = active_serializers;
883 dma_data->maxburst = 0;
888 if (period_words % active_serializers) {
889 dev_err(mcasp->dev, "Invalid combination of period words and "
890 "active serializers: %d, %d\n", period_words,
896 * Calculate the optimal AFIFO depth for platform side:
897 * The number of words for numevt need to be in steps of active
900 numevt = (numevt / active_serializers) * active_serializers;
902 while (period_words % numevt && numevt > 0)
903 numevt -= active_serializers;
905 numevt = active_serializers;
907 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
908 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
910 /* Configure the burst size for platform drivers */
913 dma_data->maxburst = numevt;
918 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,
923 int active_serializers;
927 total_slots = mcasp->tdm_slots;
930 * If more than one serializer is needed, then use them with
931 * all the specified tdm_slots. Otherwise, one serializer can
932 * cope with the transaction using just as many slots as there
933 * are channels in the stream.
935 if (mcasp->tdm_mask[stream]) {
936 active_slots = hweight32(mcasp->tdm_mask[stream]);
937 active_serializers = (channels + active_slots - 1) /
939 if (active_serializers == 1) {
940 active_slots = channels;
941 for (i = 0; i < total_slots; i++) {
942 if ((1 << i) & mcasp->tdm_mask[stream]) {
944 if (--active_slots <= 0)
950 active_serializers = (channels + total_slots - 1) / total_slots;
951 if (active_serializers == 1)
952 active_slots = channels;
954 active_slots = total_slots;
956 for (i = 0; i < active_slots; i++)
959 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
961 if (!mcasp->dat_port)
964 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
965 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
966 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
967 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
968 FSXMOD(total_slots), FSXMOD(0x1FF));
969 } else if (stream == SNDRV_PCM_STREAM_CAPTURE) {
970 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
971 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
972 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
973 FSRMOD(total_slots), FSRMOD(0x1FF));
975 * If McASP is set to be TX/RX synchronous and the playback is
976 * not running already we need to configure the TX slots in
977 * order to have correct FSX on the bus
979 if (mcasp_is_synchronous(mcasp) && !mcasp->channels)
980 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
981 FSXMOD(total_slots), FSXMOD(0x1FF));
988 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
992 u8 *cs_bytes = (u8*) &cs_value;
994 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
996 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
998 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
999 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
1001 /* Set the TX tdm : for all the slots */
1002 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
1004 /* Set the TX clock controls : div = 1 and internal */
1005 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
1007 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
1009 /* Only 44100 and 48000 are valid, both have the same setting */
1010 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
1012 /* Enable the DIT */
1013 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
1015 /* Set S/PDIF channel status bits */
1016 cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
1017 cs_bytes[1] = IEC958_AES1_CON_PCM_CODER;
1021 cs_bytes[3] |= IEC958_AES3_CON_FS_22050;
1024 cs_bytes[3] |= IEC958_AES3_CON_FS_24000;
1027 cs_bytes[3] |= IEC958_AES3_CON_FS_32000;
1030 cs_bytes[3] |= IEC958_AES3_CON_FS_44100;
1033 cs_bytes[3] |= IEC958_AES3_CON_FS_48000;
1036 cs_bytes[3] |= IEC958_AES3_CON_FS_88200;
1039 cs_bytes[3] |= IEC958_AES3_CON_FS_96000;
1042 cs_bytes[3] |= IEC958_AES3_CON_FS_176400;
1045 cs_bytes[3] |= IEC958_AES3_CON_FS_192000;
1048 printk(KERN_WARNING "unsupported sampling rate: %d\n", rate);
1052 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value);
1053 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value);
1058 static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp,
1059 unsigned int bclk_freq, bool set)
1062 unsigned int sysclk_freq = mcasp->sysclk_freq;
1063 u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG);
1064 int div = sysclk_freq / bclk_freq;
1065 int rem = sysclk_freq % bclk_freq;
1068 if (div > (ACLKXDIV_MASK + 1)) {
1069 if (reg & AHCLKXE) {
1070 aux_div = div / (ACLKXDIV_MASK + 1);
1071 if (div % (ACLKXDIV_MASK + 1))
1074 sysclk_freq /= aux_div;
1075 div = sysclk_freq / bclk_freq;
1076 rem = sysclk_freq % bclk_freq;
1078 dev_warn(mcasp->dev, "Too fast reference clock (%u)\n",
1085 ((sysclk_freq / div) - bclk_freq) >
1086 (bclk_freq - (sysclk_freq / (div+1)))) {
1088 rem = rem - bclk_freq;
1091 error_ppm = (div*1000000 + (int)div64_long(1000000LL*rem,
1092 (int)bclk_freq)) / div - 1000000;
1096 dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n",
1099 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_BCLK, div, 0);
1101 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_AUXCLK,
1108 static inline u32 davinci_mcasp_tx_delay(struct davinci_mcasp *mcasp)
1110 if (!mcasp->txnumevt)
1113 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_WFIFOSTS_OFFSET);
1116 static inline u32 davinci_mcasp_rx_delay(struct davinci_mcasp *mcasp)
1118 if (!mcasp->rxnumevt)
1121 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_RFIFOSTS_OFFSET);
1124 static snd_pcm_sframes_t davinci_mcasp_delay(
1125 struct snd_pcm_substream *substream,
1126 struct snd_soc_dai *cpu_dai)
1128 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1131 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1132 fifo_use = davinci_mcasp_tx_delay(mcasp);
1134 fifo_use = davinci_mcasp_rx_delay(mcasp);
1137 * Divide the used locations with the channel count to get the
1138 * FIFO usage in samples (don't care about partial samples in the
1141 return fifo_use / substream->runtime->channels;
1144 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
1145 struct snd_pcm_hw_params *params,
1146 struct snd_soc_dai *cpu_dai)
1148 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1150 int channels = params_channels(params);
1151 int period_size = params_period_size(params);
1154 ret = davinci_mcasp_set_dai_fmt(cpu_dai, mcasp->dai_fmt);
1159 * If mcasp is BCLK master, and a BCLK divider was not provided by
1160 * the machine driver, we need to calculate the ratio.
1162 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1163 int slots = mcasp->tdm_slots;
1164 int rate = params_rate(params);
1165 int sbits = params_width(params);
1167 if (mcasp->slot_width)
1168 sbits = mcasp->slot_width;
1170 davinci_mcasp_calc_clk_div(mcasp, rate * sbits * slots, true);
1173 ret = mcasp_common_hw_param(mcasp, substream->stream,
1174 period_size * channels, channels);
1178 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1179 ret = mcasp_dit_hw_param(mcasp, params_rate(params));
1181 ret = mcasp_i2s_hw_param(mcasp, substream->stream,
1187 switch (params_format(params)) {
1188 case SNDRV_PCM_FORMAT_U8:
1189 case SNDRV_PCM_FORMAT_S8:
1193 case SNDRV_PCM_FORMAT_U16_LE:
1194 case SNDRV_PCM_FORMAT_S16_LE:
1198 case SNDRV_PCM_FORMAT_U24_3LE:
1199 case SNDRV_PCM_FORMAT_S24_3LE:
1203 case SNDRV_PCM_FORMAT_U24_LE:
1204 case SNDRV_PCM_FORMAT_S24_LE:
1208 case SNDRV_PCM_FORMAT_U32_LE:
1209 case SNDRV_PCM_FORMAT_S32_LE:
1214 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
1218 davinci_config_channel_size(mcasp, word_length);
1220 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE)
1221 mcasp->channels = channels;
1226 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
1227 int cmd, struct snd_soc_dai *cpu_dai)
1229 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1233 case SNDRV_PCM_TRIGGER_RESUME:
1234 case SNDRV_PCM_TRIGGER_START:
1235 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1236 davinci_mcasp_start(mcasp, substream->stream);
1238 case SNDRV_PCM_TRIGGER_SUSPEND:
1239 case SNDRV_PCM_TRIGGER_STOP:
1240 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1241 davinci_mcasp_stop(mcasp, substream->stream);
1251 static const unsigned int davinci_mcasp_dai_rates[] = {
1252 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
1253 88200, 96000, 176400, 192000,
1256 #define DAVINCI_MAX_RATE_ERROR_PPM 1000
1258 static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
1259 struct snd_pcm_hw_rule *rule)
1261 struct davinci_mcasp_ruledata *rd = rule->private;
1262 struct snd_interval *ri =
1263 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1264 int sbits = params_width(params);
1265 int slots = rd->mcasp->tdm_slots;
1266 struct snd_interval range;
1269 if (rd->mcasp->slot_width)
1270 sbits = rd->mcasp->slot_width;
1272 snd_interval_any(&range);
1275 for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) {
1276 if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) {
1277 uint bclk_freq = sbits*slots*
1278 davinci_mcasp_dai_rates[i];
1281 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, bclk_freq,
1283 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1285 range.min = davinci_mcasp_dai_rates[i];
1288 range.max = davinci_mcasp_dai_rates[i];
1293 dev_dbg(rd->mcasp->dev,
1294 "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n",
1295 ri->min, ri->max, range.min, range.max, sbits, slots);
1297 return snd_interval_refine(hw_param_interval(params, rule->var),
1301 static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
1302 struct snd_pcm_hw_rule *rule)
1304 struct davinci_mcasp_ruledata *rd = rule->private;
1305 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1306 struct snd_mask nfmt;
1307 int rate = params_rate(params);
1308 int slots = rd->mcasp->tdm_slots;
1311 snd_mask_none(&nfmt);
1313 for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
1314 if (snd_mask_test(fmt, i)) {
1315 uint sbits = snd_pcm_format_width(i);
1318 if (rd->mcasp->slot_width)
1319 sbits = rd->mcasp->slot_width;
1321 ppm = davinci_mcasp_calc_clk_div(rd->mcasp,
1322 sbits * slots * rate,
1324 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1325 snd_mask_set(&nfmt, i);
1330 dev_dbg(rd->mcasp->dev,
1331 "%d possible sample format for %d Hz and %d tdm slots\n",
1332 count, rate, slots);
1334 return snd_mask_refine(fmt, &nfmt);
1337 static int davinci_mcasp_hw_rule_min_periodsize(
1338 struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
1340 struct snd_interval *period_size = hw_param_interval(params,
1341 SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1342 struct snd_interval frames;
1344 snd_interval_any(&frames);
1348 return snd_interval_refine(period_size, &frames);
1351 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
1352 struct snd_soc_dai *cpu_dai)
1354 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1355 struct davinci_mcasp_ruledata *ruledata =
1356 &mcasp->ruledata[substream->stream];
1357 u32 max_channels = 0;
1359 int tdm_slots = mcasp->tdm_slots;
1361 /* Do not allow more then one stream per direction */
1362 if (mcasp->substreams[substream->stream])
1365 mcasp->substreams[substream->stream] = substream;
1367 if (mcasp->tdm_mask[substream->stream])
1368 tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);
1370 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1374 * Limit the maximum allowed channels for the first stream:
1375 * number of serializers for the direction * tdm slots per serializer
1377 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1382 for (i = 0; i < mcasp->num_serializer; i++) {
1383 if (mcasp->serial_dir[i] == dir)
1386 ruledata->serializers = max_channels;
1387 max_channels *= tdm_slots;
1389 * If the already active stream has less channels than the calculated
1390 * limnit based on the seirializers * tdm_slots, we need to use that as
1391 * a constraint for the second stream.
1392 * Otherwise (first stream or less allowed channels) we use the
1393 * calculated constraint.
1395 if (mcasp->channels && mcasp->channels < max_channels)
1396 max_channels = mcasp->channels;
1398 * But we can always allow channels upto the amount of
1399 * the available tdm_slots.
1401 if (max_channels < tdm_slots)
1402 max_channels = tdm_slots;
1404 snd_pcm_hw_constraint_minmax(substream->runtime,
1405 SNDRV_PCM_HW_PARAM_CHANNELS,
1408 snd_pcm_hw_constraint_list(substream->runtime,
1409 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1410 &mcasp->chconstr[substream->stream]);
1412 if (mcasp->slot_width)
1413 snd_pcm_hw_constraint_minmax(substream->runtime,
1414 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1415 8, mcasp->slot_width);
1418 * If we rely on implicit BCLK divider setting we should
1419 * set constraints based on what we can provide.
1421 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1424 ruledata->mcasp = mcasp;
1426 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1427 SNDRV_PCM_HW_PARAM_RATE,
1428 davinci_mcasp_hw_rule_rate,
1430 SNDRV_PCM_HW_PARAM_FORMAT, -1);
1433 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1434 SNDRV_PCM_HW_PARAM_FORMAT,
1435 davinci_mcasp_hw_rule_format,
1437 SNDRV_PCM_HW_PARAM_RATE, -1);
1442 snd_pcm_hw_rule_add(substream->runtime, 0,
1443 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1444 davinci_mcasp_hw_rule_min_periodsize, NULL,
1445 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1450 static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream,
1451 struct snd_soc_dai *cpu_dai)
1453 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1455 mcasp->substreams[substream->stream] = NULL;
1457 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1460 if (!cpu_dai->active)
1461 mcasp->channels = 0;
1464 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
1465 .startup = davinci_mcasp_startup,
1466 .shutdown = davinci_mcasp_shutdown,
1467 .trigger = davinci_mcasp_trigger,
1468 .delay = davinci_mcasp_delay,
1469 .hw_params = davinci_mcasp_hw_params,
1470 .set_fmt = davinci_mcasp_set_dai_fmt,
1471 .set_clkdiv = davinci_mcasp_set_clkdiv,
1472 .set_sysclk = davinci_mcasp_set_sysclk,
1473 .set_tdm_slot = davinci_mcasp_set_tdm_slot,
1476 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
1478 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1480 dai->playback_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1481 dai->capture_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1486 #ifdef CONFIG_PM_SLEEP
1487 static int davinci_mcasp_suspend(struct snd_soc_dai *dai)
1489 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1490 struct davinci_mcasp_context *context = &mcasp->context;
1494 context->pm_state = pm_runtime_active(mcasp->dev);
1495 if (!context->pm_state)
1496 pm_runtime_get_sync(mcasp->dev);
1498 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
1499 context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);
1501 if (mcasp->txnumevt) {
1502 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
1503 context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);
1505 if (mcasp->rxnumevt) {
1506 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
1507 context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);
1510 for (i = 0; i < mcasp->num_serializer; i++)
1511 context->xrsr_regs[i] = mcasp_get_reg(mcasp,
1512 DAVINCI_MCASP_XRSRCTL_REG(i));
1514 pm_runtime_put_sync(mcasp->dev);
1519 static int davinci_mcasp_resume(struct snd_soc_dai *dai)
1521 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1522 struct davinci_mcasp_context *context = &mcasp->context;
1526 pm_runtime_get_sync(mcasp->dev);
1528 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
1529 mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);
1531 if (mcasp->txnumevt) {
1532 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
1533 mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);
1535 if (mcasp->rxnumevt) {
1536 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
1537 mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);
1540 for (i = 0; i < mcasp->num_serializer; i++)
1541 mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
1542 context->xrsr_regs[i]);
1544 if (!context->pm_state)
1545 pm_runtime_put_sync(mcasp->dev);
1550 #define davinci_mcasp_suspend NULL
1551 #define davinci_mcasp_resume NULL
1554 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
1556 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1557 SNDRV_PCM_FMTBIT_U8 | \
1558 SNDRV_PCM_FMTBIT_S16_LE | \
1559 SNDRV_PCM_FMTBIT_U16_LE | \
1560 SNDRV_PCM_FMTBIT_S24_LE | \
1561 SNDRV_PCM_FMTBIT_U24_LE | \
1562 SNDRV_PCM_FMTBIT_S24_3LE | \
1563 SNDRV_PCM_FMTBIT_U24_3LE | \
1564 SNDRV_PCM_FMTBIT_S32_LE | \
1565 SNDRV_PCM_FMTBIT_U32_LE)
1567 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
1569 .name = "davinci-mcasp.0",
1570 .probe = davinci_mcasp_dai_probe,
1571 .suspend = davinci_mcasp_suspend,
1572 .resume = davinci_mcasp_resume,
1575 .channels_max = 32 * 16,
1576 .rates = DAVINCI_MCASP_RATES,
1577 .formats = DAVINCI_MCASP_PCM_FMTS,
1581 .channels_max = 32 * 16,
1582 .rates = DAVINCI_MCASP_RATES,
1583 .formats = DAVINCI_MCASP_PCM_FMTS,
1585 .ops = &davinci_mcasp_dai_ops,
1587 .symmetric_samplebits = 1,
1588 .symmetric_rates = 1,
1591 .name = "davinci-mcasp.1",
1592 .probe = davinci_mcasp_dai_probe,
1595 .channels_max = 384,
1596 .rates = DAVINCI_MCASP_RATES,
1597 .formats = DAVINCI_MCASP_PCM_FMTS,
1599 .ops = &davinci_mcasp_dai_ops,
1604 static const struct snd_soc_component_driver davinci_mcasp_component = {
1605 .name = "davinci-mcasp",
1608 /* Some HW specific values and defaults. The rest is filled in from DT. */
1609 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
1610 .tx_dma_offset = 0x400,
1611 .rx_dma_offset = 0x400,
1612 .version = MCASP_VERSION_1,
1615 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
1616 .tx_dma_offset = 0x2000,
1617 .rx_dma_offset = 0x2000,
1618 .version = MCASP_VERSION_2,
1621 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
1624 .version = MCASP_VERSION_3,
1627 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
1628 /* The CFG port offset will be calculated if it is needed */
1631 .version = MCASP_VERSION_4,
1634 static const struct of_device_id mcasp_dt_ids[] = {
1636 .compatible = "ti,dm646x-mcasp-audio",
1637 .data = &dm646x_mcasp_pdata,
1640 .compatible = "ti,da830-mcasp-audio",
1641 .data = &da830_mcasp_pdata,
1644 .compatible = "ti,am33xx-mcasp-audio",
1645 .data = &am33xx_mcasp_pdata,
1648 .compatible = "ti,dra7-mcasp-audio",
1649 .data = &dra7_mcasp_pdata,
1653 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1655 static int mcasp_reparent_fck(struct platform_device *pdev)
1657 struct device_node *node = pdev->dev.of_node;
1658 struct clk *gfclk, *parent_clk;
1659 const char *parent_name;
1665 parent_name = of_get_property(node, "fck_parent", NULL);
1669 dev_warn(&pdev->dev, "Update the bindings to use assigned-clocks!\n");
1671 gfclk = clk_get(&pdev->dev, "fck");
1672 if (IS_ERR(gfclk)) {
1673 dev_err(&pdev->dev, "failed to get fck\n");
1674 return PTR_ERR(gfclk);
1677 parent_clk = clk_get(NULL, parent_name);
1678 if (IS_ERR(parent_clk)) {
1679 dev_err(&pdev->dev, "failed to get parent clock\n");
1680 ret = PTR_ERR(parent_clk);
1684 ret = clk_set_parent(gfclk, parent_clk);
1686 dev_err(&pdev->dev, "failed to reparent fck\n");
1691 clk_put(parent_clk);
1697 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
1698 struct platform_device *pdev)
1700 struct device_node *np = pdev->dev.of_node;
1701 struct davinci_mcasp_pdata *pdata = NULL;
1702 const struct of_device_id *match =
1703 of_match_device(mcasp_dt_ids, &pdev->dev);
1704 struct of_phandle_args dma_spec;
1706 const u32 *of_serial_dir32;
1710 if (pdev->dev.platform_data) {
1711 pdata = pdev->dev.platform_data;
1714 pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata),
1721 /* control shouldn't reach here. something is wrong */
1726 ret = of_property_read_u32(np, "op-mode", &val);
1728 pdata->op_mode = val;
1730 ret = of_property_read_u32(np, "tdm-slots", &val);
1732 if (val < 2 || val > 32) {
1734 "tdm-slots must be in rage [2-32]\n");
1739 pdata->tdm_slots = val;
1742 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1744 if (of_serial_dir32) {
1745 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1746 (sizeof(*of_serial_dir) * val),
1748 if (!of_serial_dir) {
1753 for (i = 0; i < val; i++)
1754 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1756 pdata->num_serializer = val;
1757 pdata->serial_dir = of_serial_dir;
1760 ret = of_property_match_string(np, "dma-names", "tx");
1764 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1769 pdata->tx_dma_channel = dma_spec.args[0];
1771 /* RX is not valid in DIT mode */
1772 if (pdata->op_mode != DAVINCI_MCASP_DIT_MODE) {
1773 ret = of_property_match_string(np, "dma-names", "rx");
1777 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1782 pdata->rx_dma_channel = dma_spec.args[0];
1785 ret = of_property_read_u32(np, "tx-num-evt", &val);
1787 pdata->txnumevt = val;
1789 ret = of_property_read_u32(np, "rx-num-evt", &val);
1791 pdata->rxnumevt = val;
1793 ret = of_property_read_u32(np, "sram-size-playback", &val);
1795 pdata->sram_size_playback = val;
1797 ret = of_property_read_u32(np, "sram-size-capture", &val);
1799 pdata->sram_size_capture = val;
1805 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1816 static const char *sdma_prefix = "ti,omap";
1818 static int davinci_mcasp_get_dma_type(struct davinci_mcasp *mcasp)
1820 struct dma_chan *chan;
1824 if (!mcasp->dev->of_node)
1827 tmp = mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data;
1828 chan = dma_request_slave_channel_reason(mcasp->dev, tmp);
1830 if (PTR_ERR(chan) != -EPROBE_DEFER)
1832 "Can't verify DMA configuration (%ld)\n",
1834 return PTR_ERR(chan);
1836 if (WARN_ON(!chan->device || !chan->device->dev))
1839 if (chan->device->dev->of_node)
1840 ret = of_property_read_string(chan->device->dev->of_node,
1841 "compatible", &tmp);
1843 dev_dbg(mcasp->dev, "DMA controller has no of-node\n");
1845 dma_release_channel(chan);
1849 dev_dbg(mcasp->dev, "DMA controller compatible = \"%s\"\n", tmp);
1850 if (!strncmp(tmp, sdma_prefix, strlen(sdma_prefix)))
1856 static u32 davinci_mcasp_txdma_offset(struct davinci_mcasp_pdata *pdata)
1861 if (pdata->version != MCASP_VERSION_4)
1862 return pdata->tx_dma_offset;
1864 for (i = 0; i < pdata->num_serializer; i++) {
1865 if (pdata->serial_dir[i] == TX_MODE) {
1867 offset = DAVINCI_MCASP_TXBUF_REG(i);
1869 pr_err("%s: Only one serializer allowed!\n",
1879 static u32 davinci_mcasp_rxdma_offset(struct davinci_mcasp_pdata *pdata)
1884 if (pdata->version != MCASP_VERSION_4)
1885 return pdata->rx_dma_offset;
1887 for (i = 0; i < pdata->num_serializer; i++) {
1888 if (pdata->serial_dir[i] == RX_MODE) {
1890 offset = DAVINCI_MCASP_RXBUF_REG(i);
1892 pr_err("%s: Only one serializer allowed!\n",
1902 static int davinci_mcasp_probe(struct platform_device *pdev)
1904 struct snd_dmaengine_dai_dma_data *dma_data;
1905 struct resource *mem, *res, *dat;
1906 struct davinci_mcasp_pdata *pdata;
1907 struct davinci_mcasp *mcasp;
1913 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
1914 dev_err(&pdev->dev, "No platform data supplied\n");
1918 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
1923 pdata = davinci_mcasp_set_pdata_from_of(pdev);
1925 dev_err(&pdev->dev, "no platform data\n");
1929 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1931 dev_warn(mcasp->dev,
1932 "\"mpu\" mem resource not found, using index 0\n");
1933 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1935 dev_err(&pdev->dev, "no mem resource?\n");
1940 mcasp->base = devm_ioremap_resource(&pdev->dev, mem);
1941 if (IS_ERR(mcasp->base))
1942 return PTR_ERR(mcasp->base);
1944 pm_runtime_enable(&pdev->dev);
1946 mcasp->op_mode = pdata->op_mode;
1947 /* sanity check for tdm slots parameter */
1948 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) {
1949 if (pdata->tdm_slots < 2) {
1950 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
1952 mcasp->tdm_slots = 2;
1953 } else if (pdata->tdm_slots > 32) {
1954 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
1956 mcasp->tdm_slots = 32;
1958 mcasp->tdm_slots = pdata->tdm_slots;
1962 mcasp->num_serializer = pdata->num_serializer;
1963 #ifdef CONFIG_PM_SLEEP
1964 mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev,
1965 mcasp->num_serializer, sizeof(u32),
1967 if (!mcasp->context.xrsr_regs) {
1972 mcasp->serial_dir = pdata->serial_dir;
1973 mcasp->version = pdata->version;
1974 mcasp->txnumevt = pdata->txnumevt;
1975 mcasp->rxnumevt = pdata->rxnumevt;
1977 mcasp->dev = &pdev->dev;
1979 irq = platform_get_irq_byname(pdev, "common");
1981 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common",
1982 dev_name(&pdev->dev));
1987 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1988 davinci_mcasp_common_irq_handler,
1989 IRQF_ONESHOT | IRQF_SHARED,
1992 dev_err(&pdev->dev, "common IRQ request failed\n");
1996 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
1997 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
2000 irq = platform_get_irq_byname(pdev, "rx");
2002 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx",
2003 dev_name(&pdev->dev));
2008 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2009 davinci_mcasp_rx_irq_handler,
2010 IRQF_ONESHOT, irq_name, mcasp);
2012 dev_err(&pdev->dev, "RX IRQ request failed\n");
2016 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
2019 irq = platform_get_irq_byname(pdev, "tx");
2021 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx",
2022 dev_name(&pdev->dev));
2027 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2028 davinci_mcasp_tx_irq_handler,
2029 IRQF_ONESHOT, irq_name, mcasp);
2031 dev_err(&pdev->dev, "TX IRQ request failed\n");
2035 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
2038 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
2040 mcasp->dat_port = true;
2042 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
2044 dma_data->addr = dat->start;
2046 dma_data->addr = mem->start + davinci_mcasp_txdma_offset(pdata);
2048 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
2049 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
2053 *dma = pdata->tx_dma_channel;
2055 /* dmaengine filter data for DT and non-DT boot */
2056 if (pdev->dev.of_node)
2057 dma_data->filter_data = "tx";
2059 dma_data->filter_data = dma;
2061 /* RX is not valid in DIT mode */
2062 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
2063 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
2065 dma_data->addr = dat->start;
2068 mem->start + davinci_mcasp_rxdma_offset(pdata);
2070 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_CAPTURE];
2071 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
2075 *dma = pdata->rx_dma_channel;
2077 /* dmaengine filter data for DT and non-DT boot */
2078 if (pdev->dev.of_node)
2079 dma_data->filter_data = "rx";
2081 dma_data->filter_data = dma;
2084 if (mcasp->version < MCASP_VERSION_3) {
2085 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
2086 /* dma_params->dma_addr is pointing to the data port address */
2087 mcasp->dat_port = true;
2089 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
2092 /* Allocate memory for long enough list for all possible
2093 * scenarios. Maximum number tdm slots is 32 and there cannot
2094 * be more serializers than given in the configuration. The
2095 * serializer directions could be taken into account, but it
2096 * would make code much more complex and save only couple of
2099 mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list =
2100 devm_kcalloc(mcasp->dev,
2101 32 + mcasp->num_serializer - 1,
2102 sizeof(unsigned int),
2105 mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list =
2106 devm_kcalloc(mcasp->dev,
2107 32 + mcasp->num_serializer - 1,
2108 sizeof(unsigned int),
2111 if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list ||
2112 !mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list) {
2117 ret = davinci_mcasp_set_ch_constraints(mcasp);
2121 dev_set_drvdata(&pdev->dev, mcasp);
2123 mcasp_reparent_fck(pdev);
2125 ret = devm_snd_soc_register_component(&pdev->dev,
2126 &davinci_mcasp_component,
2127 &davinci_mcasp_dai[pdata->op_mode], 1);
2132 ret = davinci_mcasp_get_dma_type(mcasp);
2135 #if IS_BUILTIN(CONFIG_SND_EDMA_SOC) || \
2136 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
2137 IS_MODULE(CONFIG_SND_EDMA_SOC))
2138 ret = edma_pcm_platform_register(&pdev->dev);
2140 dev_err(&pdev->dev, "Missing SND_EDMA_SOC\n");
2146 #if IS_BUILTIN(CONFIG_SND_SDMA_SOC) || \
2147 (IS_MODULE(CONFIG_SND_DAVINCI_SOC_MCASP) && \
2148 IS_MODULE(CONFIG_SND_SDMA_SOC))
2149 ret = sdma_pcm_platform_register(&pdev->dev, NULL, NULL);
2151 dev_err(&pdev->dev, "Missing SND_SDMA_SOC\n");
2157 dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
2164 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
2171 pm_runtime_disable(&pdev->dev);
2175 static int davinci_mcasp_remove(struct platform_device *pdev)
2177 pm_runtime_disable(&pdev->dev);
2182 static struct platform_driver davinci_mcasp_driver = {
2183 .probe = davinci_mcasp_probe,
2184 .remove = davinci_mcasp_remove,
2186 .name = "davinci-mcasp",
2187 .of_match_table = mcasp_dt_ids,
2191 module_platform_driver(davinci_mcasp_driver);
2193 MODULE_AUTHOR("Steve Chen");
2194 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
2195 MODULE_LICENSE("GPL");