1 // SPDX-License-Identifier: GPL-2.0-only
3 * ALSA SoC McASP Audio Layer for TI DAVINCI processor
5 * Multi-channel Audio Serial Port Driver
7 * Author: Nirmal Pandey <n-pandey@ti.com>,
8 * Suresh Rajashekara <suresh.r@ti.com>
9 * Steve Chen <schen@.mvista.com>
11 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
12 * Copyright: (C) 2009 Texas Instruments, India
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/device.h>
18 #include <linux/slab.h>
19 #include <linux/delay.h>
21 #include <linux/clk.h>
22 #include <linux/pm_runtime.h>
24 #include <linux/of_platform.h>
25 #include <linux/of_device.h>
26 #include <linux/platform_data/davinci_asp.h>
27 #include <linux/math64.h>
28 #include <linux/bitmap.h>
29 #include <linux/gpio/driver.h>
31 #include <sound/asoundef.h>
32 #include <sound/core.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/initval.h>
36 #include <sound/soc.h>
37 #include <sound/dmaengine_pcm.h>
41 #include "davinci-mcasp.h"
43 #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_PFUNC_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 */
71 struct davinci_mcasp_ruledata {
72 struct davinci_mcasp *mcasp;
76 struct davinci_mcasp {
77 struct snd_dmaengine_dai_dma_data dma_data[2];
81 struct snd_pcm_substream *substreams[2];
84 /* McASP specific data */
102 unsigned long pdir; /* Pin direction bitfield */
104 /* McASP FIFO related */
110 /* Used for comstraint setting on the second stream */
112 u8 active_serializers[2];
114 #ifdef CONFIG_GPIOLIB
115 struct gpio_chip gpio_chip;
119 struct davinci_mcasp_context context;
122 struct davinci_mcasp_ruledata ruledata[2];
123 struct snd_pcm_hw_constraint_list chconstr[2];
126 static inline void mcasp_set_bits(struct davinci_mcasp *mcasp, u32 offset,
129 void __iomem *reg = mcasp->base + offset;
130 __raw_writel(__raw_readl(reg) | val, reg);
133 static inline void mcasp_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
136 void __iomem *reg = mcasp->base + offset;
137 __raw_writel((__raw_readl(reg) & ~(val)), reg);
140 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
143 void __iomem *reg = mcasp->base + offset;
144 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
147 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
150 __raw_writel(val, mcasp->base + offset);
153 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
155 return (u32)__raw_readl(mcasp->base + offset);
158 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
162 mcasp_set_bits(mcasp, ctl_reg, val);
164 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
165 /* loop count is to avoid the lock-up */
166 for (i = 0; i < 1000; i++) {
167 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
171 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
172 printk(KERN_ERR "GBLCTL write error\n");
175 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
177 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
178 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
180 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
183 static inline void mcasp_set_clk_pdir(struct davinci_mcasp *mcasp, bool enable)
185 u32 bit = PIN_BIT_AMUTE;
187 for_each_set_bit_from(bit, &mcasp->pdir, PIN_BIT_AFSR + 1) {
189 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
191 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
195 static inline void mcasp_set_axr_pdir(struct davinci_mcasp *mcasp, bool enable)
199 for_each_set_bit(bit, &mcasp->pdir, PIN_BIT_AMUTE) {
201 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
203 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
207 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
209 if (mcasp->rxnumevt) { /* enable FIFO */
210 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
212 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
213 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
217 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
218 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
220 * When ASYNC == 0 the transmit and receive sections operate
221 * synchronously from the transmit clock and frame sync. We need to make
222 * sure that the TX signlas are enabled when starting reception.
224 if (mcasp_is_synchronous(mcasp)) {
225 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
226 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
227 mcasp_set_clk_pdir(mcasp, true);
230 /* Activate serializer(s) */
231 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
232 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
233 /* Release RX state machine */
234 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
235 /* Release Frame Sync generator */
236 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
237 if (mcasp_is_synchronous(mcasp))
238 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
240 /* enable receive IRQs */
241 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
242 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
245 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
249 if (mcasp->txnumevt) { /* enable FIFO */
250 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
252 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
253 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
257 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
258 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
259 mcasp_set_clk_pdir(mcasp, true);
261 /* Activate serializer(s) */
262 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
263 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
265 /* wait for XDATA to be cleared */
267 while ((mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) & XRDATA) &&
271 mcasp_set_axr_pdir(mcasp, true);
273 /* Release TX state machine */
274 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
275 /* Release Frame Sync generator */
276 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
278 /* enable transmit IRQs */
279 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
280 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
283 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
287 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
288 mcasp_start_tx(mcasp);
290 mcasp_start_rx(mcasp);
293 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
295 /* disable IRQ sources */
296 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
297 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
300 * In synchronous mode stop the TX clocks if no other stream is
303 if (mcasp_is_synchronous(mcasp) && !mcasp->streams) {
304 mcasp_set_clk_pdir(mcasp, false);
305 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
308 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
309 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
311 if (mcasp->rxnumevt) { /* disable FIFO */
312 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
314 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
318 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
322 /* disable IRQ sources */
323 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
324 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
327 * In synchronous mode keep TX clocks running if the capture stream is
330 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
331 val = TXHCLKRST | TXCLKRST | TXFSRST;
333 mcasp_set_clk_pdir(mcasp, false);
336 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
337 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
339 if (mcasp->txnumevt) { /* disable FIFO */
340 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
342 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
345 mcasp_set_axr_pdir(mcasp, false);
348 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
352 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
353 mcasp_stop_tx(mcasp);
355 mcasp_stop_rx(mcasp);
358 static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data)
360 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
361 struct snd_pcm_substream *substream;
362 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK];
363 u32 handled_mask = 0;
366 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG);
367 if (stat & XUNDRN & irq_mask) {
368 dev_warn(mcasp->dev, "Transmit buffer underflow\n");
369 handled_mask |= XUNDRN;
371 substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK];
373 snd_pcm_stop_xrun(substream);
377 dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n",
381 handled_mask |= XRERR;
383 /* Ack the handled event only */
384 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask);
386 return IRQ_RETVAL(handled_mask);
389 static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data)
391 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
392 struct snd_pcm_substream *substream;
393 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE];
394 u32 handled_mask = 0;
397 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG);
398 if (stat & ROVRN & irq_mask) {
399 dev_warn(mcasp->dev, "Receive buffer overflow\n");
400 handled_mask |= ROVRN;
402 substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE];
404 snd_pcm_stop_xrun(substream);
408 dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n",
412 handled_mask |= XRERR;
414 /* Ack the handled event only */
415 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask);
417 return IRQ_RETVAL(handled_mask);
420 static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data)
422 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
423 irqreturn_t ret = IRQ_NONE;
425 if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK])
426 ret = davinci_mcasp_tx_irq_handler(irq, data);
428 if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE])
429 ret |= davinci_mcasp_rx_irq_handler(irq, data);
434 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
437 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
446 pm_runtime_get_sync(mcasp->dev);
447 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
448 case SND_SOC_DAIFMT_DSP_A:
449 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
450 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
451 /* 1st data bit occur one ACLK cycle after the frame sync */
454 case SND_SOC_DAIFMT_DSP_B:
455 case SND_SOC_DAIFMT_AC97:
456 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
457 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
458 /* No delay after FS */
461 case SND_SOC_DAIFMT_I2S:
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 /* 1st data bit occur one ACLK cycle after the frame sync */
467 /* FS need to be inverted */
470 case SND_SOC_DAIFMT_RIGHT_J:
471 case SND_SOC_DAIFMT_LEFT_J:
472 /* configure a full-word SYNC pulse (LRCLK) */
473 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
474 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
475 /* No delay after FS */
483 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
485 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
488 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
489 case SND_SOC_DAIFMT_CBS_CFS:
490 /* codec is clock and frame slave */
491 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
492 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
494 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
495 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
498 set_bit(PIN_BIT_ACLKX, &mcasp->pdir);
499 set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
501 set_bit(PIN_BIT_AFSX, &mcasp->pdir);
502 set_bit(PIN_BIT_AFSR, &mcasp->pdir);
504 mcasp->bclk_master = 1;
506 case SND_SOC_DAIFMT_CBS_CFM:
507 /* codec is clock slave and frame master */
508 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
509 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
511 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
512 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
515 set_bit(PIN_BIT_ACLKX, &mcasp->pdir);
516 set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
518 clear_bit(PIN_BIT_AFSX, &mcasp->pdir);
519 clear_bit(PIN_BIT_AFSR, &mcasp->pdir);
521 mcasp->bclk_master = 1;
523 case SND_SOC_DAIFMT_CBM_CFS:
524 /* codec is clock master and frame slave */
525 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
526 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
528 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
529 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
532 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir);
533 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
535 set_bit(PIN_BIT_AFSX, &mcasp->pdir);
536 set_bit(PIN_BIT_AFSR, &mcasp->pdir);
538 mcasp->bclk_master = 0;
540 case SND_SOC_DAIFMT_CBM_CFM:
541 /* codec is clock and frame master */
542 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
543 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
545 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
546 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
549 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir);
550 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
552 clear_bit(PIN_BIT_AFSX, &mcasp->pdir);
553 clear_bit(PIN_BIT_AFSR, &mcasp->pdir);
555 mcasp->bclk_master = 0;
562 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
563 case SND_SOC_DAIFMT_IB_NF:
564 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
565 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
566 fs_pol_rising = true;
568 case SND_SOC_DAIFMT_NB_IF:
569 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
570 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
571 fs_pol_rising = false;
573 case SND_SOC_DAIFMT_IB_IF:
574 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
575 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
576 fs_pol_rising = false;
578 case SND_SOC_DAIFMT_NB_NF:
579 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
580 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
581 fs_pol_rising = true;
589 fs_pol_rising = !fs_pol_rising;
592 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
593 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
595 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
596 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
599 mcasp->dai_fmt = fmt;
601 pm_runtime_put(mcasp->dev);
605 static int __davinci_mcasp_set_clkdiv(struct davinci_mcasp *mcasp, int div_id,
606 int div, bool explicit)
608 pm_runtime_get_sync(mcasp->dev);
610 case MCASP_CLKDIV_AUXCLK: /* MCLK divider */
611 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
612 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
613 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
614 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
617 case MCASP_CLKDIV_BCLK: /* BCLK divider */
618 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
619 ACLKXDIV(div - 1), ACLKXDIV_MASK);
620 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
621 ACLKRDIV(div - 1), ACLKRDIV_MASK);
623 mcasp->bclk_div = div;
626 case MCASP_CLKDIV_BCLK_FS_RATIO:
628 * BCLK/LRCLK ratio descries how many bit-clock cycles
629 * fit into one frame. The clock ratio is given for a
630 * full period of data (for I2S format both left and
631 * right channels), so it has to be divided by number
632 * of tdm-slots (for I2S - divided by 2).
633 * Instead of storing this ratio, we calculate a new
634 * tdm_slot width by dividing the the ratio by the
635 * number of configured tdm slots.
637 mcasp->slot_width = div / mcasp->tdm_slots;
638 if (div % mcasp->tdm_slots)
640 "%s(): BCLK/LRCLK %d is not divisible by %d tdm slots",
641 __func__, div, mcasp->tdm_slots);
648 pm_runtime_put(mcasp->dev);
652 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
655 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
657 return __davinci_mcasp_set_clkdiv(mcasp, div_id, div, 1);
660 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
661 unsigned int freq, int dir)
663 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
665 pm_runtime_get_sync(mcasp->dev);
666 if (dir == SND_SOC_CLOCK_OUT) {
667 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
668 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
669 set_bit(PIN_BIT_AHCLKX, &mcasp->pdir);
671 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
672 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
673 clear_bit(PIN_BIT_AHCLKX, &mcasp->pdir);
676 mcasp->sysclk_freq = freq;
678 pm_runtime_put(mcasp->dev);
682 /* All serializers must have equal number of channels */
683 static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream,
686 struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream];
687 unsigned int *list = (unsigned int *) cl->list;
688 int slots = mcasp->tdm_slots;
691 if (mcasp->tdm_mask[stream])
692 slots = hweight32(mcasp->tdm_mask[stream]);
694 for (i = 1; i <= slots; i++)
697 for (i = 2; i <= serializers; i++)
698 list[count++] = i*slots;
705 static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp)
707 int rx_serializers = 0, tx_serializers = 0, ret, i;
709 for (i = 0; i < mcasp->num_serializer; i++)
710 if (mcasp->serial_dir[i] == TX_MODE)
712 else if (mcasp->serial_dir[i] == RX_MODE)
715 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK,
720 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE,
727 static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai,
728 unsigned int tx_mask,
729 unsigned int rx_mask,
730 int slots, int slot_width)
732 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
735 "%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n",
736 __func__, tx_mask, rx_mask, slots, slot_width);
738 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
740 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
741 tx_mask, rx_mask, slots);
746 (slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) {
747 dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n",
748 __func__, slot_width);
752 mcasp->tdm_slots = slots;
753 mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
754 mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
755 mcasp->slot_width = slot_width;
757 return davinci_mcasp_set_ch_constraints(mcasp);
760 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
764 u32 tx_rotate, rx_rotate, slot_width;
765 u32 mask = (1ULL << sample_width) - 1;
767 if (mcasp->slot_width)
768 slot_width = mcasp->slot_width;
770 slot_width = sample_width;
773 * right aligned formats: rotate w/ slot_width
774 * left aligned formats: rotate w/ sample_width
777 * right aligned formats: no rotation needed
778 * left aligned formats: rotate w/ (slot_width - sample_width)
780 if ((mcasp->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) ==
781 SND_SOC_DAIFMT_RIGHT_J) {
782 tx_rotate = (slot_width / 4) & 0x7;
785 tx_rotate = (sample_width / 4) & 0x7;
786 rx_rotate = (slot_width - sample_width) / 4;
789 /* mapping of the XSSZ bit-field as described in the datasheet */
790 fmt = (slot_width >> 1) - 1;
792 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
793 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
795 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
797 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
799 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
801 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
804 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
809 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
810 int period_words, int channels)
812 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
816 u8 slots = mcasp->tdm_slots;
817 u8 max_active_serializers = (channels + slots - 1) / slots;
818 u8 max_rx_serializers, max_tx_serializers;
819 int active_serializers, numevt;
821 /* Default configuration */
822 if (mcasp->version < MCASP_VERSION_3)
823 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
825 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
826 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
827 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
828 max_tx_serializers = max_active_serializers;
830 mcasp->active_serializers[SNDRV_PCM_STREAM_CAPTURE];
832 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
833 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
835 mcasp->active_serializers[SNDRV_PCM_STREAM_PLAYBACK];
836 max_rx_serializers = max_active_serializers;
839 for (i = 0; i < mcasp->num_serializer; i++) {
840 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
841 mcasp->serial_dir[i]);
842 if (mcasp->serial_dir[i] == TX_MODE &&
843 tx_ser < max_tx_serializers) {
844 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
845 mcasp->dismod, DISMOD_MASK);
846 set_bit(PIN_BIT_AXR(i), &mcasp->pdir);
848 } else if (mcasp->serial_dir[i] == RX_MODE &&
849 rx_ser < max_rx_serializers) {
850 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
853 /* Inactive or unused pin, set it to inactive */
854 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
855 SRMOD_INACTIVE, SRMOD_MASK);
856 /* If unused, set DISMOD for the pin */
857 if (mcasp->serial_dir[i] != INACTIVE_MODE)
858 mcasp_mod_bits(mcasp,
859 DAVINCI_MCASP_XRSRCTL_REG(i),
860 mcasp->dismod, DISMOD_MASK);
861 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
865 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
866 active_serializers = tx_ser;
867 numevt = mcasp->txnumevt;
868 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
870 active_serializers = rx_ser;
871 numevt = mcasp->rxnumevt;
872 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
875 if (active_serializers < max_active_serializers) {
876 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
877 "enabled in mcasp (%d)\n", channels,
878 active_serializers * slots);
882 /* AFIFO is not in use */
884 /* Configure the burst size for platform drivers */
885 if (active_serializers > 1) {
887 * If more than one serializers are in use we have one
888 * DMA request to provide data for all serializers.
889 * For example if three serializers are enabled the DMA
890 * need to transfer three words per DMA request.
892 dma_data->maxburst = active_serializers;
894 dma_data->maxburst = 0;
900 if (period_words % active_serializers) {
901 dev_err(mcasp->dev, "Invalid combination of period words and "
902 "active serializers: %d, %d\n", period_words,
908 * Calculate the optimal AFIFO depth for platform side:
909 * The number of words for numevt need to be in steps of active
912 numevt = (numevt / active_serializers) * active_serializers;
914 while (period_words % numevt && numevt > 0)
915 numevt -= active_serializers;
917 numevt = active_serializers;
919 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
920 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
922 /* Configure the burst size for platform drivers */
925 dma_data->maxburst = numevt;
928 mcasp->active_serializers[stream] = active_serializers;
933 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,
938 int active_serializers;
942 total_slots = mcasp->tdm_slots;
945 * If more than one serializer is needed, then use them with
946 * all the specified tdm_slots. Otherwise, one serializer can
947 * cope with the transaction using just as many slots as there
948 * are channels in the stream.
950 if (mcasp->tdm_mask[stream]) {
951 active_slots = hweight32(mcasp->tdm_mask[stream]);
952 active_serializers = (channels + active_slots - 1) /
954 if (active_serializers == 1)
955 active_slots = channels;
956 for (i = 0; i < total_slots; i++) {
957 if ((1 << i) & mcasp->tdm_mask[stream]) {
959 if (--active_slots <= 0)
964 active_serializers = (channels + total_slots - 1) / total_slots;
965 if (active_serializers == 1)
966 active_slots = channels;
968 active_slots = total_slots;
970 for (i = 0; i < active_slots; i++)
974 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
976 if (!mcasp->dat_port)
979 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
980 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
981 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
982 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
983 FSXMOD(total_slots), FSXMOD(0x1FF));
984 } else if (stream == SNDRV_PCM_STREAM_CAPTURE) {
985 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
986 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
987 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
988 FSRMOD(total_slots), FSRMOD(0x1FF));
990 * If McASP is set to be TX/RX synchronous and the playback is
991 * not running already we need to configure the TX slots in
992 * order to have correct FSX on the bus
994 if (mcasp_is_synchronous(mcasp) && !mcasp->channels)
995 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
996 FSXMOD(total_slots), FSXMOD(0x1FF));
1003 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
1007 u8 *cs_bytes = (u8*) &cs_value;
1009 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
1011 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
1013 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
1014 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
1016 /* Set the TX tdm : for all the slots */
1017 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
1019 /* Set the TX clock controls : div = 1 and internal */
1020 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
1022 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
1024 /* Only 44100 and 48000 are valid, both have the same setting */
1025 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
1027 /* Enable the DIT */
1028 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
1030 /* Set S/PDIF channel status bits */
1031 cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
1032 cs_bytes[1] = IEC958_AES1_CON_PCM_CODER;
1036 cs_bytes[3] |= IEC958_AES3_CON_FS_22050;
1039 cs_bytes[3] |= IEC958_AES3_CON_FS_24000;
1042 cs_bytes[3] |= IEC958_AES3_CON_FS_32000;
1045 cs_bytes[3] |= IEC958_AES3_CON_FS_44100;
1048 cs_bytes[3] |= IEC958_AES3_CON_FS_48000;
1051 cs_bytes[3] |= IEC958_AES3_CON_FS_88200;
1054 cs_bytes[3] |= IEC958_AES3_CON_FS_96000;
1057 cs_bytes[3] |= IEC958_AES3_CON_FS_176400;
1060 cs_bytes[3] |= IEC958_AES3_CON_FS_192000;
1063 printk(KERN_WARNING "unsupported sampling rate: %d\n", rate);
1067 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value);
1068 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value);
1073 static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp,
1074 unsigned int sysclk_freq,
1075 unsigned int bclk_freq, bool set)
1077 u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG);
1078 int div = sysclk_freq / bclk_freq;
1079 int rem = sysclk_freq % bclk_freq;
1083 if (div > (ACLKXDIV_MASK + 1)) {
1084 if (reg & AHCLKXE) {
1085 aux_div = div / (ACLKXDIV_MASK + 1);
1086 if (div % (ACLKXDIV_MASK + 1))
1089 sysclk_freq /= aux_div;
1090 div = sysclk_freq / bclk_freq;
1091 rem = sysclk_freq % bclk_freq;
1093 dev_warn(mcasp->dev, "Too fast reference clock (%u)\n",
1100 ((sysclk_freq / div) - bclk_freq) >
1101 (bclk_freq - (sysclk_freq / (div+1)))) {
1103 rem = rem - bclk_freq;
1106 error_ppm = (div*1000000 + (int)div64_long(1000000LL*rem,
1107 (int)bclk_freq)) / div - 1000000;
1111 dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n",
1114 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_BCLK, div, 0);
1116 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_AUXCLK,
1123 static inline u32 davinci_mcasp_tx_delay(struct davinci_mcasp *mcasp)
1125 if (!mcasp->txnumevt)
1128 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_WFIFOSTS_OFFSET);
1131 static inline u32 davinci_mcasp_rx_delay(struct davinci_mcasp *mcasp)
1133 if (!mcasp->rxnumevt)
1136 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_RFIFOSTS_OFFSET);
1139 static snd_pcm_sframes_t davinci_mcasp_delay(
1140 struct snd_pcm_substream *substream,
1141 struct snd_soc_dai *cpu_dai)
1143 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1146 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1147 fifo_use = davinci_mcasp_tx_delay(mcasp);
1149 fifo_use = davinci_mcasp_rx_delay(mcasp);
1152 * Divide the used locations with the channel count to get the
1153 * FIFO usage in samples (don't care about partial samples in the
1156 return fifo_use / substream->runtime->channels;
1159 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
1160 struct snd_pcm_hw_params *params,
1161 struct snd_soc_dai *cpu_dai)
1163 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1165 int channels = params_channels(params);
1166 int period_size = params_period_size(params);
1169 switch (params_format(params)) {
1170 case SNDRV_PCM_FORMAT_U8:
1171 case SNDRV_PCM_FORMAT_S8:
1175 case SNDRV_PCM_FORMAT_U16_LE:
1176 case SNDRV_PCM_FORMAT_S16_LE:
1180 case SNDRV_PCM_FORMAT_U24_3LE:
1181 case SNDRV_PCM_FORMAT_S24_3LE:
1185 case SNDRV_PCM_FORMAT_U24_LE:
1186 case SNDRV_PCM_FORMAT_S24_LE:
1190 case SNDRV_PCM_FORMAT_U32_LE:
1191 case SNDRV_PCM_FORMAT_S32_LE:
1196 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
1200 ret = davinci_mcasp_set_dai_fmt(cpu_dai, mcasp->dai_fmt);
1205 * If mcasp is BCLK master, and a BCLK divider was not provided by
1206 * the machine driver, we need to calculate the ratio.
1208 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1209 int slots = mcasp->tdm_slots;
1210 int rate = params_rate(params);
1211 int sbits = params_width(params);
1213 if (mcasp->slot_width)
1214 sbits = mcasp->slot_width;
1216 davinci_mcasp_calc_clk_div(mcasp, mcasp->sysclk_freq,
1217 rate * sbits * slots, true);
1220 ret = mcasp_common_hw_param(mcasp, substream->stream,
1221 period_size * channels, channels);
1225 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1226 ret = mcasp_dit_hw_param(mcasp, params_rate(params));
1228 ret = mcasp_i2s_hw_param(mcasp, substream->stream,
1234 davinci_config_channel_size(mcasp, word_length);
1236 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE)
1237 mcasp->channels = channels;
1242 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
1243 int cmd, struct snd_soc_dai *cpu_dai)
1245 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1249 case SNDRV_PCM_TRIGGER_RESUME:
1250 case SNDRV_PCM_TRIGGER_START:
1251 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1252 davinci_mcasp_start(mcasp, substream->stream);
1254 case SNDRV_PCM_TRIGGER_SUSPEND:
1255 case SNDRV_PCM_TRIGGER_STOP:
1256 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1257 davinci_mcasp_stop(mcasp, substream->stream);
1267 static int davinci_mcasp_hw_rule_slot_width(struct snd_pcm_hw_params *params,
1268 struct snd_pcm_hw_rule *rule)
1270 struct davinci_mcasp_ruledata *rd = rule->private;
1271 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1272 struct snd_mask nfmt;
1275 snd_mask_none(&nfmt);
1276 slot_width = rd->mcasp->slot_width;
1278 for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
1279 if (snd_mask_test(fmt, i)) {
1280 if (snd_pcm_format_width(i) <= slot_width) {
1281 snd_mask_set(&nfmt, i);
1286 return snd_mask_refine(fmt, &nfmt);
1289 static const unsigned int davinci_mcasp_dai_rates[] = {
1290 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
1291 88200, 96000, 176400, 192000,
1294 #define DAVINCI_MAX_RATE_ERROR_PPM 1000
1296 static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
1297 struct snd_pcm_hw_rule *rule)
1299 struct davinci_mcasp_ruledata *rd = rule->private;
1300 struct snd_interval *ri =
1301 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1302 int sbits = params_width(params);
1303 int slots = rd->mcasp->tdm_slots;
1304 struct snd_interval range;
1307 if (rd->mcasp->slot_width)
1308 sbits = rd->mcasp->slot_width;
1310 snd_interval_any(&range);
1313 for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) {
1314 if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) {
1315 uint bclk_freq = sbits * slots *
1316 davinci_mcasp_dai_rates[i];
1317 unsigned int sysclk_freq;
1320 if (rd->mcasp->auxclk_fs_ratio)
1321 sysclk_freq = davinci_mcasp_dai_rates[i] *
1322 rd->mcasp->auxclk_fs_ratio;
1324 sysclk_freq = rd->mcasp->sysclk_freq;
1326 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq,
1328 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1330 range.min = davinci_mcasp_dai_rates[i];
1333 range.max = davinci_mcasp_dai_rates[i];
1338 dev_dbg(rd->mcasp->dev,
1339 "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n",
1340 ri->min, ri->max, range.min, range.max, sbits, slots);
1342 return snd_interval_refine(hw_param_interval(params, rule->var),
1346 static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
1347 struct snd_pcm_hw_rule *rule)
1349 struct davinci_mcasp_ruledata *rd = rule->private;
1350 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1351 struct snd_mask nfmt;
1352 int rate = params_rate(params);
1353 int slots = rd->mcasp->tdm_slots;
1356 snd_mask_none(&nfmt);
1358 for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
1359 if (snd_mask_test(fmt, i)) {
1360 uint sbits = snd_pcm_format_width(i);
1361 unsigned int sysclk_freq;
1364 if (rd->mcasp->auxclk_fs_ratio)
1365 sysclk_freq = rate *
1366 rd->mcasp->auxclk_fs_ratio;
1368 sysclk_freq = rd->mcasp->sysclk_freq;
1370 if (rd->mcasp->slot_width)
1371 sbits = rd->mcasp->slot_width;
1373 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq,
1374 sbits * slots * rate,
1376 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1377 snd_mask_set(&nfmt, i);
1382 dev_dbg(rd->mcasp->dev,
1383 "%d possible sample format for %d Hz and %d tdm slots\n",
1384 count, rate, slots);
1386 return snd_mask_refine(fmt, &nfmt);
1389 static int davinci_mcasp_hw_rule_min_periodsize(
1390 struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
1392 struct snd_interval *period_size = hw_param_interval(params,
1393 SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1394 struct snd_interval frames;
1396 snd_interval_any(&frames);
1400 return snd_interval_refine(period_size, &frames);
1403 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
1404 struct snd_soc_dai *cpu_dai)
1406 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1407 struct davinci_mcasp_ruledata *ruledata =
1408 &mcasp->ruledata[substream->stream];
1409 u32 max_channels = 0;
1411 int tdm_slots = mcasp->tdm_slots;
1413 /* Do not allow more then one stream per direction */
1414 if (mcasp->substreams[substream->stream])
1417 mcasp->substreams[substream->stream] = substream;
1419 if (mcasp->tdm_mask[substream->stream])
1420 tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);
1422 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1426 * Limit the maximum allowed channels for the first stream:
1427 * number of serializers for the direction * tdm slots per serializer
1429 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1434 for (i = 0; i < mcasp->num_serializer; i++) {
1435 if (mcasp->serial_dir[i] == dir)
1438 ruledata->serializers = max_channels;
1439 ruledata->mcasp = mcasp;
1440 max_channels *= tdm_slots;
1442 * If the already active stream has less channels than the calculated
1443 * limit based on the seirializers * tdm_slots, and only one serializer
1444 * is in use we need to use that as a constraint for the second stream.
1445 * Otherwise (first stream or less allowed channels or more than one
1446 * serializer in use) we use the calculated constraint.
1448 if (mcasp->channels && mcasp->channels < max_channels &&
1449 ruledata->serializers == 1)
1450 max_channels = mcasp->channels;
1452 * But we can always allow channels upto the amount of
1453 * the available tdm_slots.
1455 if (max_channels < tdm_slots)
1456 max_channels = tdm_slots;
1458 snd_pcm_hw_constraint_minmax(substream->runtime,
1459 SNDRV_PCM_HW_PARAM_CHANNELS,
1462 snd_pcm_hw_constraint_list(substream->runtime,
1463 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1464 &mcasp->chconstr[substream->stream]);
1466 if (mcasp->slot_width) {
1467 /* Only allow formats require <= slot_width bits on the bus */
1468 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1469 SNDRV_PCM_HW_PARAM_FORMAT,
1470 davinci_mcasp_hw_rule_slot_width,
1472 SNDRV_PCM_HW_PARAM_FORMAT, -1);
1478 * If we rely on implicit BCLK divider setting we should
1479 * set constraints based on what we can provide.
1481 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1482 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1483 SNDRV_PCM_HW_PARAM_RATE,
1484 davinci_mcasp_hw_rule_rate,
1486 SNDRV_PCM_HW_PARAM_FORMAT, -1);
1489 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1490 SNDRV_PCM_HW_PARAM_FORMAT,
1491 davinci_mcasp_hw_rule_format,
1493 SNDRV_PCM_HW_PARAM_RATE, -1);
1498 snd_pcm_hw_rule_add(substream->runtime, 0,
1499 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1500 davinci_mcasp_hw_rule_min_periodsize, NULL,
1501 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1506 static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream,
1507 struct snd_soc_dai *cpu_dai)
1509 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1511 mcasp->substreams[substream->stream] = NULL;
1512 mcasp->active_serializers[substream->stream] = 0;
1514 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1517 if (!cpu_dai->active)
1518 mcasp->channels = 0;
1521 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
1522 .startup = davinci_mcasp_startup,
1523 .shutdown = davinci_mcasp_shutdown,
1524 .trigger = davinci_mcasp_trigger,
1525 .delay = davinci_mcasp_delay,
1526 .hw_params = davinci_mcasp_hw_params,
1527 .set_fmt = davinci_mcasp_set_dai_fmt,
1528 .set_clkdiv = davinci_mcasp_set_clkdiv,
1529 .set_sysclk = davinci_mcasp_set_sysclk,
1530 .set_tdm_slot = davinci_mcasp_set_tdm_slot,
1533 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
1535 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1537 dai->playback_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1538 dai->capture_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1543 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
1545 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1546 SNDRV_PCM_FMTBIT_U8 | \
1547 SNDRV_PCM_FMTBIT_S16_LE | \
1548 SNDRV_PCM_FMTBIT_U16_LE | \
1549 SNDRV_PCM_FMTBIT_S24_LE | \
1550 SNDRV_PCM_FMTBIT_U24_LE | \
1551 SNDRV_PCM_FMTBIT_S24_3LE | \
1552 SNDRV_PCM_FMTBIT_U24_3LE | \
1553 SNDRV_PCM_FMTBIT_S32_LE | \
1554 SNDRV_PCM_FMTBIT_U32_LE)
1556 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
1558 .name = "davinci-mcasp.0",
1559 .probe = davinci_mcasp_dai_probe,
1562 .channels_max = 32 * 16,
1563 .rates = DAVINCI_MCASP_RATES,
1564 .formats = DAVINCI_MCASP_PCM_FMTS,
1568 .channels_max = 32 * 16,
1569 .rates = DAVINCI_MCASP_RATES,
1570 .formats = DAVINCI_MCASP_PCM_FMTS,
1572 .ops = &davinci_mcasp_dai_ops,
1574 .symmetric_samplebits = 1,
1575 .symmetric_rates = 1,
1578 .name = "davinci-mcasp.1",
1579 .probe = davinci_mcasp_dai_probe,
1582 .channels_max = 384,
1583 .rates = DAVINCI_MCASP_RATES,
1584 .formats = DAVINCI_MCASP_PCM_FMTS,
1586 .ops = &davinci_mcasp_dai_ops,
1591 static const struct snd_soc_component_driver davinci_mcasp_component = {
1592 .name = "davinci-mcasp",
1595 /* Some HW specific values and defaults. The rest is filled in from DT. */
1596 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
1597 .tx_dma_offset = 0x400,
1598 .rx_dma_offset = 0x400,
1599 .version = MCASP_VERSION_1,
1602 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
1603 .tx_dma_offset = 0x2000,
1604 .rx_dma_offset = 0x2000,
1605 .version = MCASP_VERSION_2,
1608 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
1611 .version = MCASP_VERSION_3,
1614 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
1615 /* The CFG port offset will be calculated if it is needed */
1618 .version = MCASP_VERSION_4,
1621 static const struct of_device_id mcasp_dt_ids[] = {
1623 .compatible = "ti,dm646x-mcasp-audio",
1624 .data = &dm646x_mcasp_pdata,
1627 .compatible = "ti,da830-mcasp-audio",
1628 .data = &da830_mcasp_pdata,
1631 .compatible = "ti,am33xx-mcasp-audio",
1632 .data = &am33xx_mcasp_pdata,
1635 .compatible = "ti,dra7-mcasp-audio",
1636 .data = &dra7_mcasp_pdata,
1640 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1642 static int mcasp_reparent_fck(struct platform_device *pdev)
1644 struct device_node *node = pdev->dev.of_node;
1645 struct clk *gfclk, *parent_clk;
1646 const char *parent_name;
1652 parent_name = of_get_property(node, "fck_parent", NULL);
1656 dev_warn(&pdev->dev, "Update the bindings to use assigned-clocks!\n");
1658 gfclk = clk_get(&pdev->dev, "fck");
1659 if (IS_ERR(gfclk)) {
1660 dev_err(&pdev->dev, "failed to get fck\n");
1661 return PTR_ERR(gfclk);
1664 parent_clk = clk_get(NULL, parent_name);
1665 if (IS_ERR(parent_clk)) {
1666 dev_err(&pdev->dev, "failed to get parent clock\n");
1667 ret = PTR_ERR(parent_clk);
1671 ret = clk_set_parent(gfclk, parent_clk);
1673 dev_err(&pdev->dev, "failed to reparent fck\n");
1678 clk_put(parent_clk);
1684 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
1685 struct platform_device *pdev)
1687 struct device_node *np = pdev->dev.of_node;
1688 struct davinci_mcasp_pdata *pdata = NULL;
1689 const struct of_device_id *match =
1690 of_match_device(mcasp_dt_ids, &pdev->dev);
1691 struct of_phandle_args dma_spec;
1693 const u32 *of_serial_dir32;
1697 if (pdev->dev.platform_data) {
1698 pdata = pdev->dev.platform_data;
1699 pdata->dismod = DISMOD_LOW;
1702 pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata),
1709 /* control shouldn't reach here. something is wrong */
1714 ret = of_property_read_u32(np, "op-mode", &val);
1716 pdata->op_mode = val;
1718 ret = of_property_read_u32(np, "tdm-slots", &val);
1720 if (val < 2 || val > 32) {
1722 "tdm-slots must be in rage [2-32]\n");
1727 pdata->tdm_slots = val;
1730 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1732 if (of_serial_dir32) {
1733 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1734 (sizeof(*of_serial_dir) * val),
1736 if (!of_serial_dir) {
1741 for (i = 0; i < val; i++)
1742 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1744 pdata->num_serializer = val;
1745 pdata->serial_dir = of_serial_dir;
1748 ret = of_property_match_string(np, "dma-names", "tx");
1752 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1757 pdata->tx_dma_channel = dma_spec.args[0];
1759 /* RX is not valid in DIT mode */
1760 if (pdata->op_mode != DAVINCI_MCASP_DIT_MODE) {
1761 ret = of_property_match_string(np, "dma-names", "rx");
1765 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1770 pdata->rx_dma_channel = dma_spec.args[0];
1773 ret = of_property_read_u32(np, "tx-num-evt", &val);
1775 pdata->txnumevt = val;
1777 ret = of_property_read_u32(np, "rx-num-evt", &val);
1779 pdata->rxnumevt = val;
1781 ret = of_property_read_u32(np, "sram-size-playback", &val);
1783 pdata->sram_size_playback = val;
1785 ret = of_property_read_u32(np, "sram-size-capture", &val);
1787 pdata->sram_size_capture = val;
1789 ret = of_property_read_u32(np, "dismod", &val);
1791 if (val == 0 || val == 2 || val == 3) {
1792 pdata->dismod = DISMOD_VAL(val);
1794 dev_warn(&pdev->dev, "Invalid dismod value: %u\n", val);
1795 pdata->dismod = DISMOD_LOW;
1798 pdata->dismod = DISMOD_LOW;
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 #ifdef CONFIG_GPIOLIB
1903 static int davinci_mcasp_gpio_request(struct gpio_chip *chip, unsigned offset)
1905 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1907 if (mcasp->num_serializer && offset < mcasp->num_serializer &&
1908 mcasp->serial_dir[offset] != INACTIVE_MODE) {
1909 dev_err(mcasp->dev, "AXR%u pin is used for audio\n", offset);
1913 /* Do not change the PIN yet */
1915 return pm_runtime_get_sync(mcasp->dev);
1918 static void davinci_mcasp_gpio_free(struct gpio_chip *chip, unsigned offset)
1920 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1922 /* Set the direction to input */
1923 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset));
1925 /* Set the pin as McASP pin */
1926 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset));
1928 pm_runtime_put_sync(mcasp->dev);
1931 static int davinci_mcasp_gpio_direction_out(struct gpio_chip *chip,
1932 unsigned offset, int value)
1934 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1938 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1940 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1942 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG);
1943 if (!(val & BIT(offset))) {
1944 /* Set the pin as GPIO pin */
1945 mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset));
1947 /* Set the direction to output */
1948 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset));
1954 static void davinci_mcasp_gpio_set(struct gpio_chip *chip, unsigned offset,
1957 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1960 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1962 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1965 static int davinci_mcasp_gpio_direction_in(struct gpio_chip *chip,
1968 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1971 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG);
1972 if (!(val & BIT(offset))) {
1973 /* Set the direction to input */
1974 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset));
1976 /* Set the pin as GPIO pin */
1977 mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset));
1983 static int davinci_mcasp_gpio_get(struct gpio_chip *chip, unsigned offset)
1985 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1988 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDSET_REG);
1989 if (val & BIT(offset))
1995 static int davinci_mcasp_gpio_get_direction(struct gpio_chip *chip,
1998 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
2001 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
2002 if (val & BIT(offset))
2008 static const struct gpio_chip davinci_mcasp_template_chip = {
2009 .owner = THIS_MODULE,
2010 .request = davinci_mcasp_gpio_request,
2011 .free = davinci_mcasp_gpio_free,
2012 .direction_output = davinci_mcasp_gpio_direction_out,
2013 .set = davinci_mcasp_gpio_set,
2014 .direction_input = davinci_mcasp_gpio_direction_in,
2015 .get = davinci_mcasp_gpio_get,
2016 .get_direction = davinci_mcasp_gpio_get_direction,
2021 static int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp)
2023 if (!of_property_read_bool(mcasp->dev->of_node, "gpio-controller"))
2026 mcasp->gpio_chip = davinci_mcasp_template_chip;
2027 mcasp->gpio_chip.label = dev_name(mcasp->dev);
2028 mcasp->gpio_chip.parent = mcasp->dev;
2029 #ifdef CONFIG_OF_GPIO
2030 mcasp->gpio_chip.of_node = mcasp->dev->of_node;
2033 return devm_gpiochip_add_data(mcasp->dev, &mcasp->gpio_chip, mcasp);
2036 #else /* CONFIG_GPIOLIB */
2037 static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp)
2041 #endif /* CONFIG_GPIOLIB */
2043 static int davinci_mcasp_get_dt_params(struct davinci_mcasp *mcasp)
2045 struct device_node *np = mcasp->dev->of_node;
2052 ret = of_property_read_u32(np, "auxclk-fs-ratio", &val);
2054 mcasp->auxclk_fs_ratio = val;
2059 static int davinci_mcasp_probe(struct platform_device *pdev)
2061 struct snd_dmaengine_dai_dma_data *dma_data;
2062 struct resource *mem, *res, *dat;
2063 struct davinci_mcasp_pdata *pdata;
2064 struct davinci_mcasp *mcasp;
2070 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
2071 dev_err(&pdev->dev, "No platform data supplied\n");
2075 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
2080 pdata = davinci_mcasp_set_pdata_from_of(pdev);
2082 dev_err(&pdev->dev, "no platform data\n");
2086 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
2088 dev_warn(mcasp->dev,
2089 "\"mpu\" mem resource not found, using index 0\n");
2090 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2092 dev_err(&pdev->dev, "no mem resource?\n");
2097 mcasp->base = devm_ioremap_resource(&pdev->dev, mem);
2098 if (IS_ERR(mcasp->base))
2099 return PTR_ERR(mcasp->base);
2101 pm_runtime_enable(&pdev->dev);
2103 mcasp->op_mode = pdata->op_mode;
2104 /* sanity check for tdm slots parameter */
2105 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) {
2106 if (pdata->tdm_slots < 2) {
2107 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
2109 mcasp->tdm_slots = 2;
2110 } else if (pdata->tdm_slots > 32) {
2111 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
2113 mcasp->tdm_slots = 32;
2115 mcasp->tdm_slots = pdata->tdm_slots;
2119 mcasp->num_serializer = pdata->num_serializer;
2121 mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev,
2122 mcasp->num_serializer, sizeof(u32),
2124 if (!mcasp->context.xrsr_regs) {
2129 mcasp->serial_dir = pdata->serial_dir;
2130 mcasp->version = pdata->version;
2131 mcasp->txnumevt = pdata->txnumevt;
2132 mcasp->rxnumevt = pdata->rxnumevt;
2133 mcasp->dismod = pdata->dismod;
2135 mcasp->dev = &pdev->dev;
2137 irq = platform_get_irq_byname(pdev, "common");
2139 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common",
2140 dev_name(&pdev->dev));
2145 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2146 davinci_mcasp_common_irq_handler,
2147 IRQF_ONESHOT | IRQF_SHARED,
2150 dev_err(&pdev->dev, "common IRQ request failed\n");
2154 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
2155 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
2158 irq = platform_get_irq_byname(pdev, "rx");
2160 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx",
2161 dev_name(&pdev->dev));
2166 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2167 davinci_mcasp_rx_irq_handler,
2168 IRQF_ONESHOT, irq_name, mcasp);
2170 dev_err(&pdev->dev, "RX IRQ request failed\n");
2174 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
2177 irq = platform_get_irq_byname(pdev, "tx");
2179 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx",
2180 dev_name(&pdev->dev));
2185 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2186 davinci_mcasp_tx_irq_handler,
2187 IRQF_ONESHOT, irq_name, mcasp);
2189 dev_err(&pdev->dev, "TX IRQ request failed\n");
2193 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
2196 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
2198 mcasp->dat_port = true;
2200 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
2202 dma_data->addr = dat->start;
2204 dma_data->addr = mem->start + davinci_mcasp_txdma_offset(pdata);
2206 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
2207 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
2211 *dma = pdata->tx_dma_channel;
2213 /* dmaengine filter data for DT and non-DT boot */
2214 if (pdev->dev.of_node)
2215 dma_data->filter_data = "tx";
2217 dma_data->filter_data = dma;
2219 /* RX is not valid in DIT mode */
2220 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
2221 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
2223 dma_data->addr = dat->start;
2226 mem->start + davinci_mcasp_rxdma_offset(pdata);
2228 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_CAPTURE];
2229 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
2233 *dma = pdata->rx_dma_channel;
2235 /* dmaengine filter data for DT and non-DT boot */
2236 if (pdev->dev.of_node)
2237 dma_data->filter_data = "rx";
2239 dma_data->filter_data = dma;
2242 if (mcasp->version < MCASP_VERSION_3) {
2243 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
2244 /* dma_params->dma_addr is pointing to the data port address */
2245 mcasp->dat_port = true;
2247 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
2250 /* Allocate memory for long enough list for all possible
2251 * scenarios. Maximum number tdm slots is 32 and there cannot
2252 * be more serializers than given in the configuration. The
2253 * serializer directions could be taken into account, but it
2254 * would make code much more complex and save only couple of
2257 mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list =
2258 devm_kcalloc(mcasp->dev,
2259 32 + mcasp->num_serializer - 1,
2260 sizeof(unsigned int),
2263 mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list =
2264 devm_kcalloc(mcasp->dev,
2265 32 + mcasp->num_serializer - 1,
2266 sizeof(unsigned int),
2269 if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list ||
2270 !mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list) {
2275 ret = davinci_mcasp_set_ch_constraints(mcasp);
2279 dev_set_drvdata(&pdev->dev, mcasp);
2281 mcasp_reparent_fck(pdev);
2283 /* All PINS as McASP */
2284 pm_runtime_get_sync(mcasp->dev);
2285 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
2286 pm_runtime_put(mcasp->dev);
2288 ret = davinci_mcasp_init_gpiochip(mcasp);
2292 ret = davinci_mcasp_get_dt_params(mcasp);
2296 ret = devm_snd_soc_register_component(&pdev->dev,
2297 &davinci_mcasp_component,
2298 &davinci_mcasp_dai[pdata->op_mode], 1);
2303 ret = davinci_mcasp_get_dma_type(mcasp);
2306 ret = edma_pcm_platform_register(&pdev->dev);
2309 ret = sdma_pcm_platform_register(&pdev->dev, "tx", "rx");
2312 dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
2319 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
2326 pm_runtime_disable(&pdev->dev);
2330 static int davinci_mcasp_remove(struct platform_device *pdev)
2332 pm_runtime_disable(&pdev->dev);
2338 static int davinci_mcasp_runtime_suspend(struct device *dev)
2340 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
2341 struct davinci_mcasp_context *context = &mcasp->context;
2345 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
2346 context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);
2348 if (mcasp->txnumevt) {
2349 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
2350 context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);
2352 if (mcasp->rxnumevt) {
2353 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
2354 context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);
2357 for (i = 0; i < mcasp->num_serializer; i++)
2358 context->xrsr_regs[i] = mcasp_get_reg(mcasp,
2359 DAVINCI_MCASP_XRSRCTL_REG(i));
2364 static int davinci_mcasp_runtime_resume(struct device *dev)
2366 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
2367 struct davinci_mcasp_context *context = &mcasp->context;
2371 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
2372 mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);
2374 if (mcasp->txnumevt) {
2375 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
2376 mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);
2378 if (mcasp->rxnumevt) {
2379 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
2380 mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);
2383 for (i = 0; i < mcasp->num_serializer; i++)
2384 mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
2385 context->xrsr_regs[i]);
2392 static const struct dev_pm_ops davinci_mcasp_pm_ops = {
2393 SET_RUNTIME_PM_OPS(davinci_mcasp_runtime_suspend,
2394 davinci_mcasp_runtime_resume,
2398 static struct platform_driver davinci_mcasp_driver = {
2399 .probe = davinci_mcasp_probe,
2400 .remove = davinci_mcasp_remove,
2402 .name = "davinci-mcasp",
2403 .pm = &davinci_mcasp_pm_ops,
2404 .of_match_table = mcasp_dt_ids,
2408 module_platform_driver(davinci_mcasp_driver);
2410 MODULE_AUTHOR("Steve Chen");
2411 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
2412 MODULE_LICENSE("GPL");