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 */
113 #ifdef CONFIG_GPIOLIB
114 struct gpio_chip gpio_chip;
118 struct davinci_mcasp_context context;
121 struct davinci_mcasp_ruledata ruledata[2];
122 struct snd_pcm_hw_constraint_list chconstr[2];
125 static inline void mcasp_set_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_clr_bits(struct davinci_mcasp *mcasp, u32 offset,
135 void __iomem *reg = mcasp->base + offset;
136 __raw_writel((__raw_readl(reg) & ~(val)), reg);
139 static inline void mcasp_mod_bits(struct davinci_mcasp *mcasp, u32 offset,
142 void __iomem *reg = mcasp->base + offset;
143 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
146 static inline void mcasp_set_reg(struct davinci_mcasp *mcasp, u32 offset,
149 __raw_writel(val, mcasp->base + offset);
152 static inline u32 mcasp_get_reg(struct davinci_mcasp *mcasp, u32 offset)
154 return (u32)__raw_readl(mcasp->base + offset);
157 static void mcasp_set_ctl_reg(struct davinci_mcasp *mcasp, u32 ctl_reg, u32 val)
161 mcasp_set_bits(mcasp, ctl_reg, val);
163 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
164 /* loop count is to avoid the lock-up */
165 for (i = 0; i < 1000; i++) {
166 if ((mcasp_get_reg(mcasp, ctl_reg) & val) == val)
170 if (i == 1000 && ((mcasp_get_reg(mcasp, ctl_reg) & val) != val))
171 printk(KERN_ERR "GBLCTL write error\n");
174 static bool mcasp_is_synchronous(struct davinci_mcasp *mcasp)
176 u32 rxfmctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXFMCTL_REG);
177 u32 aclkxctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_ACLKXCTL_REG);
179 return !(aclkxctl & TX_ASYNC) && rxfmctl & AFSRE;
182 static inline void mcasp_set_clk_pdir(struct davinci_mcasp *mcasp, bool enable)
184 u32 bit = PIN_BIT_AMUTE;
186 for_each_set_bit_from(bit, &mcasp->pdir, PIN_BIT_AFSR + 1) {
188 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
190 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
194 static inline void mcasp_set_axr_pdir(struct davinci_mcasp *mcasp, bool enable)
198 for_each_set_bit(bit, &mcasp->pdir, PIN_BIT_AFSR) {
200 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
202 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(bit));
206 static void mcasp_start_rx(struct davinci_mcasp *mcasp)
208 if (mcasp->rxnumevt) { /* enable FIFO */
209 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
211 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
212 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
216 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
217 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
219 * When ASYNC == 0 the transmit and receive sections operate
220 * synchronously from the transmit clock and frame sync. We need to make
221 * sure that the TX signlas are enabled when starting reception.
223 if (mcasp_is_synchronous(mcasp)) {
224 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
225 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
228 /* Activate serializer(s) */
229 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
230 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
231 /* Release RX state machine */
232 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
233 /* Release Frame Sync generator */
234 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
235 if (mcasp_is_synchronous(mcasp))
236 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
238 /* enable receive IRQs */
239 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
240 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
243 static void mcasp_start_tx(struct davinci_mcasp *mcasp)
247 if (mcasp->txnumevt) { /* enable FIFO */
248 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
250 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
251 mcasp_set_bits(mcasp, reg, FIFO_ENABLE);
255 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
256 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
257 mcasp_set_clk_pdir(mcasp, true);
259 /* Activate serializer(s) */
260 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
261 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
263 /* wait for XDATA to be cleared */
265 while ((mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG) & XRDATA) &&
269 mcasp_set_axr_pdir(mcasp, true);
271 /* Release TX state machine */
272 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
273 /* Release Frame Sync generator */
274 mcasp_set_ctl_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
276 /* enable transmit IRQs */
277 mcasp_set_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
278 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
281 static void davinci_mcasp_start(struct davinci_mcasp *mcasp, int stream)
285 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
286 mcasp_start_tx(mcasp);
288 mcasp_start_rx(mcasp);
291 static void mcasp_stop_rx(struct davinci_mcasp *mcasp)
293 /* disable IRQ sources */
294 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLR_REG,
295 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE]);
298 * In synchronous mode stop the TX clocks if no other stream is
301 if (mcasp_is_synchronous(mcasp) && !mcasp->streams) {
302 mcasp_set_clk_pdir(mcasp, false);
303 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, 0);
306 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLR_REG, 0);
307 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
309 if (mcasp->rxnumevt) { /* disable FIFO */
310 u32 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
312 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
316 static void mcasp_stop_tx(struct davinci_mcasp *mcasp)
320 /* disable IRQ sources */
321 mcasp_clr_bits(mcasp, DAVINCI_MCASP_EVTCTLX_REG,
322 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK]);
325 * In synchronous mode keep TX clocks running if the capture stream is
328 if (mcasp_is_synchronous(mcasp) && mcasp->streams)
329 val = TXHCLKRST | TXCLKRST | TXFSRST;
331 mcasp_set_clk_pdir(mcasp, false);
334 mcasp_set_reg(mcasp, DAVINCI_MCASP_GBLCTLX_REG, val);
335 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
337 if (mcasp->txnumevt) { /* disable FIFO */
338 u32 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
340 mcasp_clr_bits(mcasp, reg, FIFO_ENABLE);
343 mcasp_set_axr_pdir(mcasp, false);
346 static void davinci_mcasp_stop(struct davinci_mcasp *mcasp, int stream)
350 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
351 mcasp_stop_tx(mcasp);
353 mcasp_stop_rx(mcasp);
356 static irqreturn_t davinci_mcasp_tx_irq_handler(int irq, void *data)
358 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
359 struct snd_pcm_substream *substream;
360 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK];
361 u32 handled_mask = 0;
364 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG);
365 if (stat & XUNDRN & irq_mask) {
366 dev_warn(mcasp->dev, "Transmit buffer underflow\n");
367 handled_mask |= XUNDRN;
369 substream = mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK];
371 snd_pcm_stop_xrun(substream);
375 dev_warn(mcasp->dev, "unhandled tx event. txstat: 0x%08x\n",
379 handled_mask |= XRERR;
381 /* Ack the handled event only */
382 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, handled_mask);
384 return IRQ_RETVAL(handled_mask);
387 static irqreturn_t davinci_mcasp_rx_irq_handler(int irq, void *data)
389 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
390 struct snd_pcm_substream *substream;
391 u32 irq_mask = mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE];
392 u32 handled_mask = 0;
395 stat = mcasp_get_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG);
396 if (stat & ROVRN & irq_mask) {
397 dev_warn(mcasp->dev, "Receive buffer overflow\n");
398 handled_mask |= ROVRN;
400 substream = mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE];
402 snd_pcm_stop_xrun(substream);
406 dev_warn(mcasp->dev, "unhandled rx event. rxstat: 0x%08x\n",
410 handled_mask |= XRERR;
412 /* Ack the handled event only */
413 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, handled_mask);
415 return IRQ_RETVAL(handled_mask);
418 static irqreturn_t davinci_mcasp_common_irq_handler(int irq, void *data)
420 struct davinci_mcasp *mcasp = (struct davinci_mcasp *)data;
421 irqreturn_t ret = IRQ_NONE;
423 if (mcasp->substreams[SNDRV_PCM_STREAM_PLAYBACK])
424 ret = davinci_mcasp_tx_irq_handler(irq, data);
426 if (mcasp->substreams[SNDRV_PCM_STREAM_CAPTURE])
427 ret |= davinci_mcasp_rx_irq_handler(irq, data);
432 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
435 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
444 pm_runtime_get_sync(mcasp->dev);
445 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
446 case SND_SOC_DAIFMT_DSP_A:
447 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
448 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
449 /* 1st data bit occur one ACLK cycle after the frame sync */
452 case SND_SOC_DAIFMT_DSP_B:
453 case SND_SOC_DAIFMT_AC97:
454 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
455 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
456 /* No delay after FS */
459 case SND_SOC_DAIFMT_I2S:
460 /* configure a full-word SYNC pulse (LRCLK) */
461 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
462 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
463 /* 1st data bit occur one ACLK cycle after the frame sync */
465 /* FS need to be inverted */
468 case SND_SOC_DAIFMT_LEFT_J:
469 /* configure a full-word SYNC pulse (LRCLK) */
470 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
471 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
472 /* No delay after FS */
480 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, FSXDLY(data_delay),
482 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, FSRDLY(data_delay),
485 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
486 case SND_SOC_DAIFMT_CBS_CFS:
487 /* codec is clock and frame slave */
488 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
489 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
491 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
492 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
495 set_bit(PIN_BIT_ACLKX, &mcasp->pdir);
496 set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
498 set_bit(PIN_BIT_AFSX, &mcasp->pdir);
499 set_bit(PIN_BIT_AFSR, &mcasp->pdir);
501 mcasp->bclk_master = 1;
503 case SND_SOC_DAIFMT_CBS_CFM:
504 /* codec is clock slave and frame master */
505 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
506 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
508 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
509 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
512 set_bit(PIN_BIT_ACLKX, &mcasp->pdir);
513 set_bit(PIN_BIT_ACLKR, &mcasp->pdir);
515 clear_bit(PIN_BIT_AFSX, &mcasp->pdir);
516 clear_bit(PIN_BIT_AFSR, &mcasp->pdir);
518 mcasp->bclk_master = 1;
520 case SND_SOC_DAIFMT_CBM_CFS:
521 /* codec is clock master and frame slave */
522 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
523 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
525 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
526 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
529 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir);
530 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
532 set_bit(PIN_BIT_AFSX, &mcasp->pdir);
533 set_bit(PIN_BIT_AFSR, &mcasp->pdir);
535 mcasp->bclk_master = 0;
537 case SND_SOC_DAIFMT_CBM_CFM:
538 /* codec is clock and frame master */
539 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
540 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
542 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
543 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
546 clear_bit(PIN_BIT_ACLKX, &mcasp->pdir);
547 clear_bit(PIN_BIT_ACLKR, &mcasp->pdir);
549 clear_bit(PIN_BIT_AFSX, &mcasp->pdir);
550 clear_bit(PIN_BIT_AFSR, &mcasp->pdir);
552 mcasp->bclk_master = 0;
559 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
560 case SND_SOC_DAIFMT_IB_NF:
561 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
562 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
563 fs_pol_rising = true;
565 case SND_SOC_DAIFMT_NB_IF:
566 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
567 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
568 fs_pol_rising = false;
570 case SND_SOC_DAIFMT_IB_IF:
571 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
572 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
573 fs_pol_rising = false;
575 case SND_SOC_DAIFMT_NB_NF:
576 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
577 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
578 fs_pol_rising = true;
586 fs_pol_rising = !fs_pol_rising;
589 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
590 mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
592 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
593 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
596 mcasp->dai_fmt = fmt;
598 pm_runtime_put(mcasp->dev);
602 static int __davinci_mcasp_set_clkdiv(struct davinci_mcasp *mcasp, int div_id,
603 int div, bool explicit)
605 pm_runtime_get_sync(mcasp->dev);
607 case MCASP_CLKDIV_AUXCLK: /* MCLK divider */
608 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG,
609 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
610 mcasp_mod_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG,
611 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
614 case MCASP_CLKDIV_BCLK: /* BCLK divider */
615 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG,
616 ACLKXDIV(div - 1), ACLKXDIV_MASK);
617 mcasp_mod_bits(mcasp, DAVINCI_MCASP_ACLKRCTL_REG,
618 ACLKRDIV(div - 1), ACLKRDIV_MASK);
620 mcasp->bclk_div = div;
623 case MCASP_CLKDIV_BCLK_FS_RATIO:
625 * BCLK/LRCLK ratio descries how many bit-clock cycles
626 * fit into one frame. The clock ratio is given for a
627 * full period of data (for I2S format both left and
628 * right channels), so it has to be divided by number
629 * of tdm-slots (for I2S - divided by 2).
630 * Instead of storing this ratio, we calculate a new
631 * tdm_slot width by dividing the the ratio by the
632 * number of configured tdm slots.
634 mcasp->slot_width = div / mcasp->tdm_slots;
635 if (div % mcasp->tdm_slots)
637 "%s(): BCLK/LRCLK %d is not divisible by %d tdm slots",
638 __func__, div, mcasp->tdm_slots);
645 pm_runtime_put(mcasp->dev);
649 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id,
652 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
654 return __davinci_mcasp_set_clkdiv(mcasp, div_id, div, 1);
657 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
658 unsigned int freq, int dir)
660 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
662 pm_runtime_get_sync(mcasp->dev);
663 if (dir == SND_SOC_CLOCK_OUT) {
664 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
665 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
666 set_bit(PIN_BIT_AHCLKX, &mcasp->pdir);
668 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
669 mcasp_clr_bits(mcasp, DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
670 clear_bit(PIN_BIT_AHCLKX, &mcasp->pdir);
673 mcasp->sysclk_freq = freq;
675 pm_runtime_put(mcasp->dev);
679 /* All serializers must have equal number of channels */
680 static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream,
683 struct snd_pcm_hw_constraint_list *cl = &mcasp->chconstr[stream];
684 unsigned int *list = (unsigned int *) cl->list;
685 int slots = mcasp->tdm_slots;
688 if (mcasp->tdm_mask[stream])
689 slots = hweight32(mcasp->tdm_mask[stream]);
691 for (i = 1; i <= slots; i++)
694 for (i = 2; i <= serializers; i++)
695 list[count++] = i*slots;
702 static int davinci_mcasp_set_ch_constraints(struct davinci_mcasp *mcasp)
704 int rx_serializers = 0, tx_serializers = 0, ret, i;
706 for (i = 0; i < mcasp->num_serializer; i++)
707 if (mcasp->serial_dir[i] == TX_MODE)
709 else if (mcasp->serial_dir[i] == RX_MODE)
712 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_PLAYBACK,
717 ret = davinci_mcasp_ch_constraint(mcasp, SNDRV_PCM_STREAM_CAPTURE,
724 static int davinci_mcasp_set_tdm_slot(struct snd_soc_dai *dai,
725 unsigned int tx_mask,
726 unsigned int rx_mask,
727 int slots, int slot_width)
729 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
732 "%s() tx_mask 0x%08x rx_mask 0x%08x slots %d width %d\n",
733 __func__, tx_mask, rx_mask, slots, slot_width);
735 if (tx_mask >= (1<<slots) || rx_mask >= (1<<slots)) {
737 "Bad tdm mask tx: 0x%08x rx: 0x%08x slots %d\n",
738 tx_mask, rx_mask, slots);
743 (slot_width < 8 || slot_width > 32 || slot_width % 4 != 0)) {
744 dev_err(mcasp->dev, "%s: Unsupported slot_width %d\n",
745 __func__, slot_width);
749 mcasp->tdm_slots = slots;
750 mcasp->tdm_mask[SNDRV_PCM_STREAM_PLAYBACK] = tx_mask;
751 mcasp->tdm_mask[SNDRV_PCM_STREAM_CAPTURE] = rx_mask;
752 mcasp->slot_width = slot_width;
754 return davinci_mcasp_set_ch_constraints(mcasp);
757 static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
761 u32 tx_rotate = (sample_width / 4) & 0x7;
762 u32 mask = (1ULL << sample_width) - 1;
763 u32 slot_width = sample_width;
766 * For captured data we should not rotate, inversion and masking is
767 * enoguh to get the data to the right position:
768 * Format data from bus after reverse (XRBUF)
769 * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB|
770 * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
771 * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB|
772 * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB|
777 * Setting the tdm slot width either with set_clkdiv() or
778 * set_tdm_slot() allows us to for example send 32 bits per
779 * channel to the codec, while only 16 of them carry audio
782 if (mcasp->slot_width) {
784 * When we have more bclk then it is needed for the
785 * data, we need to use the rotation to move the
786 * received samples to have correct alignment.
788 slot_width = mcasp->slot_width;
789 rx_rotate = (slot_width - sample_width) / 4;
792 /* mapping of the XSSZ bit-field as described in the datasheet */
793 fmt = (slot_width >> 1) - 1;
795 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
796 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXSSZ(fmt),
798 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXSSZ(fmt),
800 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(tx_rotate),
802 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, RXROT(rx_rotate),
804 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXMASK_REG, mask);
807 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXMASK_REG, mask);
812 static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
813 int period_words, int channels)
815 struct snd_dmaengine_dai_dma_data *dma_data = &mcasp->dma_data[stream];
819 u8 slots = mcasp->tdm_slots;
820 u8 max_active_serializers = (channels + slots - 1) / slots;
821 int active_serializers, numevt;
823 /* Default configuration */
824 if (mcasp->version < MCASP_VERSION_3)
825 mcasp_set_bits(mcasp, DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
827 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
828 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
829 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
831 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
832 mcasp_clr_bits(mcasp, DAVINCI_MCASP_REVTCTL_REG, RXDATADMADIS);
835 for (i = 0; i < mcasp->num_serializer; i++) {
836 mcasp_set_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
837 mcasp->serial_dir[i]);
838 if (mcasp->serial_dir[i] == TX_MODE &&
839 tx_ser < max_active_serializers) {
840 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
841 mcasp->dismod, DISMOD_MASK);
842 set_bit(PIN_BIT_AXR(i), &mcasp->pdir);
844 } else if (mcasp->serial_dir[i] == RX_MODE &&
845 rx_ser < max_active_serializers) {
846 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
849 /* Inactive or unused pin, set it to inactive */
850 mcasp_mod_bits(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
851 SRMOD_INACTIVE, SRMOD_MASK);
852 /* If unused, set DISMOD for the pin */
853 if (mcasp->serial_dir[i] != INACTIVE_MODE)
854 mcasp_mod_bits(mcasp,
855 DAVINCI_MCASP_XRSRCTL_REG(i),
856 mcasp->dismod, DISMOD_MASK);
857 clear_bit(PIN_BIT_AXR(i), &mcasp->pdir);
861 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
862 active_serializers = tx_ser;
863 numevt = mcasp->txnumevt;
864 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
866 active_serializers = rx_ser;
867 numevt = mcasp->rxnumevt;
868 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
871 if (active_serializers < max_active_serializers) {
872 dev_warn(mcasp->dev, "stream has more channels (%d) than are "
873 "enabled in mcasp (%d)\n", channels,
874 active_serializers * slots);
878 /* AFIFO is not in use */
880 /* Configure the burst size for platform drivers */
881 if (active_serializers > 1) {
883 * If more than one serializers are in use we have one
884 * DMA request to provide data for all serializers.
885 * For example if three serializers are enabled the DMA
886 * need to transfer three words per DMA request.
888 dma_data->maxburst = active_serializers;
890 dma_data->maxburst = 0;
895 if (period_words % active_serializers) {
896 dev_err(mcasp->dev, "Invalid combination of period words and "
897 "active serializers: %d, %d\n", period_words,
903 * Calculate the optimal AFIFO depth for platform side:
904 * The number of words for numevt need to be in steps of active
907 numevt = (numevt / active_serializers) * active_serializers;
909 while (period_words % numevt && numevt > 0)
910 numevt -= active_serializers;
912 numevt = active_serializers;
914 mcasp_mod_bits(mcasp, reg, active_serializers, NUMDMA_MASK);
915 mcasp_mod_bits(mcasp, reg, NUMEVT(numevt), NUMEVT_MASK);
917 /* Configure the burst size for platform drivers */
920 dma_data->maxburst = numevt;
925 static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream,
930 int active_serializers;
934 total_slots = mcasp->tdm_slots;
937 * If more than one serializer is needed, then use them with
938 * all the specified tdm_slots. Otherwise, one serializer can
939 * cope with the transaction using just as many slots as there
940 * are channels in the stream.
942 if (mcasp->tdm_mask[stream]) {
943 active_slots = hweight32(mcasp->tdm_mask[stream]);
944 active_serializers = (channels + active_slots - 1) /
946 if (active_serializers == 1)
947 active_slots = channels;
948 for (i = 0; i < total_slots; i++) {
949 if ((1 << i) & mcasp->tdm_mask[stream]) {
951 if (--active_slots <= 0)
956 active_serializers = (channels + total_slots - 1) / total_slots;
957 if (active_serializers == 1)
958 active_slots = channels;
960 active_slots = total_slots;
962 for (i = 0; i < active_slots; i++)
966 mcasp_clr_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
968 if (!mcasp->dat_port)
971 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
972 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
973 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
974 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
975 FSXMOD(total_slots), FSXMOD(0x1FF));
976 } else if (stream == SNDRV_PCM_STREAM_CAPTURE) {
977 mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
978 mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
979 mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
980 FSRMOD(total_slots), FSRMOD(0x1FF));
982 * If McASP is set to be TX/RX synchronous and the playback is
983 * not running already we need to configure the TX slots in
984 * order to have correct FSX on the bus
986 if (mcasp_is_synchronous(mcasp) && !mcasp->channels)
987 mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
988 FSXMOD(total_slots), FSXMOD(0x1FF));
995 static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp,
999 u8 *cs_bytes = (u8*) &cs_value;
1001 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
1003 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, TXROT(6) | TXSSZ(15));
1005 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
1006 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, AFSXE | FSXMOD(0x180));
1008 /* Set the TX tdm : for all the slots */
1009 mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
1011 /* Set the TX clock controls : div = 1 and internal */
1012 mcasp_set_bits(mcasp, DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE | TX_ASYNC);
1014 mcasp_clr_bits(mcasp, DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
1016 /* Only 44100 and 48000 are valid, both have the same setting */
1017 mcasp_set_bits(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
1019 /* Enable the DIT */
1020 mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
1022 /* Set S/PDIF channel status bits */
1023 cs_bytes[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
1024 cs_bytes[1] = IEC958_AES1_CON_PCM_CODER;
1028 cs_bytes[3] |= IEC958_AES3_CON_FS_22050;
1031 cs_bytes[3] |= IEC958_AES3_CON_FS_24000;
1034 cs_bytes[3] |= IEC958_AES3_CON_FS_32000;
1037 cs_bytes[3] |= IEC958_AES3_CON_FS_44100;
1040 cs_bytes[3] |= IEC958_AES3_CON_FS_48000;
1043 cs_bytes[3] |= IEC958_AES3_CON_FS_88200;
1046 cs_bytes[3] |= IEC958_AES3_CON_FS_96000;
1049 cs_bytes[3] |= IEC958_AES3_CON_FS_176400;
1052 cs_bytes[3] |= IEC958_AES3_CON_FS_192000;
1055 printk(KERN_WARNING "unsupported sampling rate: %d\n", rate);
1059 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRA_REG, cs_value);
1060 mcasp_set_reg(mcasp, DAVINCI_MCASP_DITCSRB_REG, cs_value);
1065 static int davinci_mcasp_calc_clk_div(struct davinci_mcasp *mcasp,
1066 unsigned int sysclk_freq,
1067 unsigned int bclk_freq, bool set)
1069 u32 reg = mcasp_get_reg(mcasp, DAVINCI_MCASP_AHCLKXCTL_REG);
1070 int div = sysclk_freq / bclk_freq;
1071 int rem = sysclk_freq % bclk_freq;
1075 if (div > (ACLKXDIV_MASK + 1)) {
1076 if (reg & AHCLKXE) {
1077 aux_div = div / (ACLKXDIV_MASK + 1);
1078 if (div % (ACLKXDIV_MASK + 1))
1081 sysclk_freq /= aux_div;
1082 div = sysclk_freq / bclk_freq;
1083 rem = sysclk_freq % bclk_freq;
1085 dev_warn(mcasp->dev, "Too fast reference clock (%u)\n",
1092 ((sysclk_freq / div) - bclk_freq) >
1093 (bclk_freq - (sysclk_freq / (div+1)))) {
1095 rem = rem - bclk_freq;
1098 error_ppm = (div*1000000 + (int)div64_long(1000000LL*rem,
1099 (int)bclk_freq)) / div - 1000000;
1103 dev_info(mcasp->dev, "Sample-rate is off by %d PPM\n",
1106 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_BCLK, div, 0);
1108 __davinci_mcasp_set_clkdiv(mcasp, MCASP_CLKDIV_AUXCLK,
1115 static inline u32 davinci_mcasp_tx_delay(struct davinci_mcasp *mcasp)
1117 if (!mcasp->txnumevt)
1120 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_WFIFOSTS_OFFSET);
1123 static inline u32 davinci_mcasp_rx_delay(struct davinci_mcasp *mcasp)
1125 if (!mcasp->rxnumevt)
1128 return mcasp_get_reg(mcasp, mcasp->fifo_base + MCASP_RFIFOSTS_OFFSET);
1131 static snd_pcm_sframes_t davinci_mcasp_delay(
1132 struct snd_pcm_substream *substream,
1133 struct snd_soc_dai *cpu_dai)
1135 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1138 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1139 fifo_use = davinci_mcasp_tx_delay(mcasp);
1141 fifo_use = davinci_mcasp_rx_delay(mcasp);
1144 * Divide the used locations with the channel count to get the
1145 * FIFO usage in samples (don't care about partial samples in the
1148 return fifo_use / substream->runtime->channels;
1151 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
1152 struct snd_pcm_hw_params *params,
1153 struct snd_soc_dai *cpu_dai)
1155 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1157 int channels = params_channels(params);
1158 int period_size = params_period_size(params);
1161 ret = davinci_mcasp_set_dai_fmt(cpu_dai, mcasp->dai_fmt);
1166 * If mcasp is BCLK master, and a BCLK divider was not provided by
1167 * the machine driver, we need to calculate the ratio.
1169 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1170 int slots = mcasp->tdm_slots;
1171 int rate = params_rate(params);
1172 int sbits = params_width(params);
1174 if (mcasp->slot_width)
1175 sbits = mcasp->slot_width;
1177 davinci_mcasp_calc_clk_div(mcasp, mcasp->sysclk_freq,
1178 rate * sbits * slots, true);
1181 ret = mcasp_common_hw_param(mcasp, substream->stream,
1182 period_size * channels, channels);
1186 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1187 ret = mcasp_dit_hw_param(mcasp, params_rate(params));
1189 ret = mcasp_i2s_hw_param(mcasp, substream->stream,
1195 switch (params_format(params)) {
1196 case SNDRV_PCM_FORMAT_U8:
1197 case SNDRV_PCM_FORMAT_S8:
1201 case SNDRV_PCM_FORMAT_U16_LE:
1202 case SNDRV_PCM_FORMAT_S16_LE:
1206 case SNDRV_PCM_FORMAT_U24_3LE:
1207 case SNDRV_PCM_FORMAT_S24_3LE:
1211 case SNDRV_PCM_FORMAT_U24_LE:
1212 case SNDRV_PCM_FORMAT_S24_LE:
1216 case SNDRV_PCM_FORMAT_U32_LE:
1217 case SNDRV_PCM_FORMAT_S32_LE:
1222 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
1226 davinci_config_channel_size(mcasp, word_length);
1228 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE)
1229 mcasp->channels = channels;
1234 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
1235 int cmd, struct snd_soc_dai *cpu_dai)
1237 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1241 case SNDRV_PCM_TRIGGER_RESUME:
1242 case SNDRV_PCM_TRIGGER_START:
1243 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1244 davinci_mcasp_start(mcasp, substream->stream);
1246 case SNDRV_PCM_TRIGGER_SUSPEND:
1247 case SNDRV_PCM_TRIGGER_STOP:
1248 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1249 davinci_mcasp_stop(mcasp, substream->stream);
1259 static const unsigned int davinci_mcasp_dai_rates[] = {
1260 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
1261 88200, 96000, 176400, 192000,
1264 #define DAVINCI_MAX_RATE_ERROR_PPM 1000
1266 static int davinci_mcasp_hw_rule_rate(struct snd_pcm_hw_params *params,
1267 struct snd_pcm_hw_rule *rule)
1269 struct davinci_mcasp_ruledata *rd = rule->private;
1270 struct snd_interval *ri =
1271 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1272 int sbits = params_width(params);
1273 int slots = rd->mcasp->tdm_slots;
1274 struct snd_interval range;
1277 if (rd->mcasp->slot_width)
1278 sbits = rd->mcasp->slot_width;
1280 snd_interval_any(&range);
1283 for (i = 0; i < ARRAY_SIZE(davinci_mcasp_dai_rates); i++) {
1284 if (snd_interval_test(ri, davinci_mcasp_dai_rates[i])) {
1285 uint bclk_freq = sbits * slots *
1286 davinci_mcasp_dai_rates[i];
1287 unsigned int sysclk_freq;
1290 if (rd->mcasp->auxclk_fs_ratio)
1291 sysclk_freq = davinci_mcasp_dai_rates[i] *
1292 rd->mcasp->auxclk_fs_ratio;
1294 sysclk_freq = rd->mcasp->sysclk_freq;
1296 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq,
1298 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1300 range.min = davinci_mcasp_dai_rates[i];
1303 range.max = davinci_mcasp_dai_rates[i];
1308 dev_dbg(rd->mcasp->dev,
1309 "Frequencies %d-%d -> %d-%d for %d sbits and %d tdm slots\n",
1310 ri->min, ri->max, range.min, range.max, sbits, slots);
1312 return snd_interval_refine(hw_param_interval(params, rule->var),
1316 static int davinci_mcasp_hw_rule_format(struct snd_pcm_hw_params *params,
1317 struct snd_pcm_hw_rule *rule)
1319 struct davinci_mcasp_ruledata *rd = rule->private;
1320 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1321 struct snd_mask nfmt;
1322 int rate = params_rate(params);
1323 int slots = rd->mcasp->tdm_slots;
1326 snd_mask_none(&nfmt);
1328 for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
1329 if (snd_mask_test(fmt, i)) {
1330 uint sbits = snd_pcm_format_width(i);
1331 unsigned int sysclk_freq;
1334 if (rd->mcasp->auxclk_fs_ratio)
1335 sysclk_freq = rate *
1336 rd->mcasp->auxclk_fs_ratio;
1338 sysclk_freq = rd->mcasp->sysclk_freq;
1340 if (rd->mcasp->slot_width)
1341 sbits = rd->mcasp->slot_width;
1343 ppm = davinci_mcasp_calc_clk_div(rd->mcasp, sysclk_freq,
1344 sbits * slots * rate,
1346 if (abs(ppm) < DAVINCI_MAX_RATE_ERROR_PPM) {
1347 snd_mask_set(&nfmt, i);
1352 dev_dbg(rd->mcasp->dev,
1353 "%d possible sample format for %d Hz and %d tdm slots\n",
1354 count, rate, slots);
1356 return snd_mask_refine(fmt, &nfmt);
1359 static int davinci_mcasp_hw_rule_min_periodsize(
1360 struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
1362 struct snd_interval *period_size = hw_param_interval(params,
1363 SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1364 struct snd_interval frames;
1366 snd_interval_any(&frames);
1370 return snd_interval_refine(period_size, &frames);
1373 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
1374 struct snd_soc_dai *cpu_dai)
1376 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1377 struct davinci_mcasp_ruledata *ruledata =
1378 &mcasp->ruledata[substream->stream];
1379 u32 max_channels = 0;
1381 int tdm_slots = mcasp->tdm_slots;
1383 /* Do not allow more then one stream per direction */
1384 if (mcasp->substreams[substream->stream])
1387 mcasp->substreams[substream->stream] = substream;
1389 if (mcasp->tdm_mask[substream->stream])
1390 tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);
1392 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1396 * Limit the maximum allowed channels for the first stream:
1397 * number of serializers for the direction * tdm slots per serializer
1399 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1404 for (i = 0; i < mcasp->num_serializer; i++) {
1405 if (mcasp->serial_dir[i] == dir)
1408 ruledata->serializers = max_channels;
1409 max_channels *= tdm_slots;
1411 * If the already active stream has less channels than the calculated
1412 * limnit based on the seirializers * tdm_slots, we need to use that as
1413 * a constraint for the second stream.
1414 * Otherwise (first stream or less allowed channels) we use the
1415 * calculated constraint.
1417 if (mcasp->channels && mcasp->channels < max_channels)
1418 max_channels = mcasp->channels;
1420 * But we can always allow channels upto the amount of
1421 * the available tdm_slots.
1423 if (max_channels < tdm_slots)
1424 max_channels = tdm_slots;
1426 snd_pcm_hw_constraint_minmax(substream->runtime,
1427 SNDRV_PCM_HW_PARAM_CHANNELS,
1430 snd_pcm_hw_constraint_list(substream->runtime,
1431 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1432 &mcasp->chconstr[substream->stream]);
1434 if (mcasp->slot_width)
1435 snd_pcm_hw_constraint_minmax(substream->runtime,
1436 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1437 8, mcasp->slot_width);
1440 * If we rely on implicit BCLK divider setting we should
1441 * set constraints based on what we can provide.
1443 if (mcasp->bclk_master && mcasp->bclk_div == 0 && mcasp->sysclk_freq) {
1446 ruledata->mcasp = mcasp;
1448 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1449 SNDRV_PCM_HW_PARAM_RATE,
1450 davinci_mcasp_hw_rule_rate,
1452 SNDRV_PCM_HW_PARAM_FORMAT, -1);
1455 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
1456 SNDRV_PCM_HW_PARAM_FORMAT,
1457 davinci_mcasp_hw_rule_format,
1459 SNDRV_PCM_HW_PARAM_RATE, -1);
1464 snd_pcm_hw_rule_add(substream->runtime, 0,
1465 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1466 davinci_mcasp_hw_rule_min_periodsize, NULL,
1467 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1472 static void davinci_mcasp_shutdown(struct snd_pcm_substream *substream,
1473 struct snd_soc_dai *cpu_dai)
1475 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
1477 mcasp->substreams[substream->stream] = NULL;
1479 if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
1482 if (!cpu_dai->active)
1483 mcasp->channels = 0;
1486 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
1487 .startup = davinci_mcasp_startup,
1488 .shutdown = davinci_mcasp_shutdown,
1489 .trigger = davinci_mcasp_trigger,
1490 .delay = davinci_mcasp_delay,
1491 .hw_params = davinci_mcasp_hw_params,
1492 .set_fmt = davinci_mcasp_set_dai_fmt,
1493 .set_clkdiv = davinci_mcasp_set_clkdiv,
1494 .set_sysclk = davinci_mcasp_set_sysclk,
1495 .set_tdm_slot = davinci_mcasp_set_tdm_slot,
1498 static int davinci_mcasp_dai_probe(struct snd_soc_dai *dai)
1500 struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai);
1502 dai->playback_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
1503 dai->capture_dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
1508 #define DAVINCI_MCASP_RATES SNDRV_PCM_RATE_8000_192000
1510 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1511 SNDRV_PCM_FMTBIT_U8 | \
1512 SNDRV_PCM_FMTBIT_S16_LE | \
1513 SNDRV_PCM_FMTBIT_U16_LE | \
1514 SNDRV_PCM_FMTBIT_S24_LE | \
1515 SNDRV_PCM_FMTBIT_U24_LE | \
1516 SNDRV_PCM_FMTBIT_S24_3LE | \
1517 SNDRV_PCM_FMTBIT_U24_3LE | \
1518 SNDRV_PCM_FMTBIT_S32_LE | \
1519 SNDRV_PCM_FMTBIT_U32_LE)
1521 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
1523 .name = "davinci-mcasp.0",
1524 .probe = davinci_mcasp_dai_probe,
1527 .channels_max = 32 * 16,
1528 .rates = DAVINCI_MCASP_RATES,
1529 .formats = DAVINCI_MCASP_PCM_FMTS,
1533 .channels_max = 32 * 16,
1534 .rates = DAVINCI_MCASP_RATES,
1535 .formats = DAVINCI_MCASP_PCM_FMTS,
1537 .ops = &davinci_mcasp_dai_ops,
1539 .symmetric_samplebits = 1,
1540 .symmetric_rates = 1,
1543 .name = "davinci-mcasp.1",
1544 .probe = davinci_mcasp_dai_probe,
1547 .channels_max = 384,
1548 .rates = DAVINCI_MCASP_RATES,
1549 .formats = DAVINCI_MCASP_PCM_FMTS,
1551 .ops = &davinci_mcasp_dai_ops,
1556 static const struct snd_soc_component_driver davinci_mcasp_component = {
1557 .name = "davinci-mcasp",
1560 /* Some HW specific values and defaults. The rest is filled in from DT. */
1561 static struct davinci_mcasp_pdata dm646x_mcasp_pdata = {
1562 .tx_dma_offset = 0x400,
1563 .rx_dma_offset = 0x400,
1564 .version = MCASP_VERSION_1,
1567 static struct davinci_mcasp_pdata da830_mcasp_pdata = {
1568 .tx_dma_offset = 0x2000,
1569 .rx_dma_offset = 0x2000,
1570 .version = MCASP_VERSION_2,
1573 static struct davinci_mcasp_pdata am33xx_mcasp_pdata = {
1576 .version = MCASP_VERSION_3,
1579 static struct davinci_mcasp_pdata dra7_mcasp_pdata = {
1580 /* The CFG port offset will be calculated if it is needed */
1583 .version = MCASP_VERSION_4,
1586 static const struct of_device_id mcasp_dt_ids[] = {
1588 .compatible = "ti,dm646x-mcasp-audio",
1589 .data = &dm646x_mcasp_pdata,
1592 .compatible = "ti,da830-mcasp-audio",
1593 .data = &da830_mcasp_pdata,
1596 .compatible = "ti,am33xx-mcasp-audio",
1597 .data = &am33xx_mcasp_pdata,
1600 .compatible = "ti,dra7-mcasp-audio",
1601 .data = &dra7_mcasp_pdata,
1605 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1607 static int mcasp_reparent_fck(struct platform_device *pdev)
1609 struct device_node *node = pdev->dev.of_node;
1610 struct clk *gfclk, *parent_clk;
1611 const char *parent_name;
1617 parent_name = of_get_property(node, "fck_parent", NULL);
1621 dev_warn(&pdev->dev, "Update the bindings to use assigned-clocks!\n");
1623 gfclk = clk_get(&pdev->dev, "fck");
1624 if (IS_ERR(gfclk)) {
1625 dev_err(&pdev->dev, "failed to get fck\n");
1626 return PTR_ERR(gfclk);
1629 parent_clk = clk_get(NULL, parent_name);
1630 if (IS_ERR(parent_clk)) {
1631 dev_err(&pdev->dev, "failed to get parent clock\n");
1632 ret = PTR_ERR(parent_clk);
1636 ret = clk_set_parent(gfclk, parent_clk);
1638 dev_err(&pdev->dev, "failed to reparent fck\n");
1643 clk_put(parent_clk);
1649 static struct davinci_mcasp_pdata *davinci_mcasp_set_pdata_from_of(
1650 struct platform_device *pdev)
1652 struct device_node *np = pdev->dev.of_node;
1653 struct davinci_mcasp_pdata *pdata = NULL;
1654 const struct of_device_id *match =
1655 of_match_device(mcasp_dt_ids, &pdev->dev);
1656 struct of_phandle_args dma_spec;
1658 const u32 *of_serial_dir32;
1662 if (pdev->dev.platform_data) {
1663 pdata = pdev->dev.platform_data;
1664 pdata->dismod = DISMOD_LOW;
1667 pdata = devm_kmemdup(&pdev->dev, match->data, sizeof(*pdata),
1674 /* control shouldn't reach here. something is wrong */
1679 ret = of_property_read_u32(np, "op-mode", &val);
1681 pdata->op_mode = val;
1683 ret = of_property_read_u32(np, "tdm-slots", &val);
1685 if (val < 2 || val > 32) {
1687 "tdm-slots must be in rage [2-32]\n");
1692 pdata->tdm_slots = val;
1695 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1697 if (of_serial_dir32) {
1698 u8 *of_serial_dir = devm_kzalloc(&pdev->dev,
1699 (sizeof(*of_serial_dir) * val),
1701 if (!of_serial_dir) {
1706 for (i = 0; i < val; i++)
1707 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1709 pdata->num_serializer = val;
1710 pdata->serial_dir = of_serial_dir;
1713 ret = of_property_match_string(np, "dma-names", "tx");
1717 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1722 pdata->tx_dma_channel = dma_spec.args[0];
1724 /* RX is not valid in DIT mode */
1725 if (pdata->op_mode != DAVINCI_MCASP_DIT_MODE) {
1726 ret = of_property_match_string(np, "dma-names", "rx");
1730 ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", ret,
1735 pdata->rx_dma_channel = dma_spec.args[0];
1738 ret = of_property_read_u32(np, "tx-num-evt", &val);
1740 pdata->txnumevt = val;
1742 ret = of_property_read_u32(np, "rx-num-evt", &val);
1744 pdata->rxnumevt = val;
1746 ret = of_property_read_u32(np, "sram-size-playback", &val);
1748 pdata->sram_size_playback = val;
1750 ret = of_property_read_u32(np, "sram-size-capture", &val);
1752 pdata->sram_size_capture = val;
1754 ret = of_property_read_u32(np, "dismod", &val);
1756 if (val == 0 || val == 2 || val == 3) {
1757 pdata->dismod = DISMOD_VAL(val);
1759 dev_warn(&pdev->dev, "Invalid dismod value: %u\n", val);
1760 pdata->dismod = DISMOD_LOW;
1763 pdata->dismod = DISMOD_LOW;
1770 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1781 static const char *sdma_prefix = "ti,omap";
1783 static int davinci_mcasp_get_dma_type(struct davinci_mcasp *mcasp)
1785 struct dma_chan *chan;
1789 if (!mcasp->dev->of_node)
1792 tmp = mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data;
1793 chan = dma_request_slave_channel_reason(mcasp->dev, tmp);
1795 if (PTR_ERR(chan) != -EPROBE_DEFER)
1797 "Can't verify DMA configuration (%ld)\n",
1799 return PTR_ERR(chan);
1801 if (WARN_ON(!chan->device || !chan->device->dev))
1804 if (chan->device->dev->of_node)
1805 ret = of_property_read_string(chan->device->dev->of_node,
1806 "compatible", &tmp);
1808 dev_dbg(mcasp->dev, "DMA controller has no of-node\n");
1810 dma_release_channel(chan);
1814 dev_dbg(mcasp->dev, "DMA controller compatible = \"%s\"\n", tmp);
1815 if (!strncmp(tmp, sdma_prefix, strlen(sdma_prefix)))
1821 static u32 davinci_mcasp_txdma_offset(struct davinci_mcasp_pdata *pdata)
1826 if (pdata->version != MCASP_VERSION_4)
1827 return pdata->tx_dma_offset;
1829 for (i = 0; i < pdata->num_serializer; i++) {
1830 if (pdata->serial_dir[i] == TX_MODE) {
1832 offset = DAVINCI_MCASP_TXBUF_REG(i);
1834 pr_err("%s: Only one serializer allowed!\n",
1844 static u32 davinci_mcasp_rxdma_offset(struct davinci_mcasp_pdata *pdata)
1849 if (pdata->version != MCASP_VERSION_4)
1850 return pdata->rx_dma_offset;
1852 for (i = 0; i < pdata->num_serializer; i++) {
1853 if (pdata->serial_dir[i] == RX_MODE) {
1855 offset = DAVINCI_MCASP_RXBUF_REG(i);
1857 pr_err("%s: Only one serializer allowed!\n",
1867 #ifdef CONFIG_GPIOLIB
1868 static int davinci_mcasp_gpio_request(struct gpio_chip *chip, unsigned offset)
1870 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1872 if (mcasp->num_serializer && offset < mcasp->num_serializer &&
1873 mcasp->serial_dir[offset] != INACTIVE_MODE) {
1874 dev_err(mcasp->dev, "AXR%u pin is used for audio\n", offset);
1878 /* Do not change the PIN yet */
1880 return pm_runtime_get_sync(mcasp->dev);
1883 static void davinci_mcasp_gpio_free(struct gpio_chip *chip, unsigned offset)
1885 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1887 /* Set the direction to input */
1888 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset));
1890 /* Set the pin as McASP pin */
1891 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset));
1893 pm_runtime_put_sync(mcasp->dev);
1896 static int davinci_mcasp_gpio_direction_out(struct gpio_chip *chip,
1897 unsigned offset, int value)
1899 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1903 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1905 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1907 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG);
1908 if (!(val & BIT(offset))) {
1909 /* Set the pin as GPIO pin */
1910 mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset));
1912 /* Set the direction to output */
1913 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset));
1919 static void davinci_mcasp_gpio_set(struct gpio_chip *chip, unsigned offset,
1922 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1925 mcasp_set_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1927 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDOUT_REG, BIT(offset));
1930 static int davinci_mcasp_gpio_direction_in(struct gpio_chip *chip,
1933 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1936 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PFUNC_REG);
1937 if (!(val & BIT(offset))) {
1938 /* Set the direction to input */
1939 mcasp_clr_bits(mcasp, DAVINCI_MCASP_PDIR_REG, BIT(offset));
1941 /* Set the pin as GPIO pin */
1942 mcasp_set_bits(mcasp, DAVINCI_MCASP_PFUNC_REG, BIT(offset));
1948 static int davinci_mcasp_gpio_get(struct gpio_chip *chip, unsigned offset)
1950 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1953 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDSET_REG);
1954 if (val & BIT(offset))
1960 static int davinci_mcasp_gpio_get_direction(struct gpio_chip *chip,
1963 struct davinci_mcasp *mcasp = gpiochip_get_data(chip);
1966 val = mcasp_get_reg(mcasp, DAVINCI_MCASP_PDIR_REG);
1967 if (val & BIT(offset))
1973 static const struct gpio_chip davinci_mcasp_template_chip = {
1974 .owner = THIS_MODULE,
1975 .request = davinci_mcasp_gpio_request,
1976 .free = davinci_mcasp_gpio_free,
1977 .direction_output = davinci_mcasp_gpio_direction_out,
1978 .set = davinci_mcasp_gpio_set,
1979 .direction_input = davinci_mcasp_gpio_direction_in,
1980 .get = davinci_mcasp_gpio_get,
1981 .get_direction = davinci_mcasp_gpio_get_direction,
1986 static int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp)
1988 if (!of_property_read_bool(mcasp->dev->of_node, "gpio-controller"))
1991 mcasp->gpio_chip = davinci_mcasp_template_chip;
1992 mcasp->gpio_chip.label = dev_name(mcasp->dev);
1993 mcasp->gpio_chip.parent = mcasp->dev;
1994 #ifdef CONFIG_OF_GPIO
1995 mcasp->gpio_chip.of_node = mcasp->dev->of_node;
1998 return devm_gpiochip_add_data(mcasp->dev, &mcasp->gpio_chip, mcasp);
2001 #else /* CONFIG_GPIOLIB */
2002 static inline int davinci_mcasp_init_gpiochip(struct davinci_mcasp *mcasp)
2006 #endif /* CONFIG_GPIOLIB */
2008 static int davinci_mcasp_get_dt_params(struct davinci_mcasp *mcasp)
2010 struct device_node *np = mcasp->dev->of_node;
2017 ret = of_property_read_u32(np, "auxclk-fs-ratio", &val);
2019 mcasp->auxclk_fs_ratio = val;
2024 static int davinci_mcasp_probe(struct platform_device *pdev)
2026 struct snd_dmaengine_dai_dma_data *dma_data;
2027 struct resource *mem, *res, *dat;
2028 struct davinci_mcasp_pdata *pdata;
2029 struct davinci_mcasp *mcasp;
2035 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
2036 dev_err(&pdev->dev, "No platform data supplied\n");
2040 mcasp = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcasp),
2045 pdata = davinci_mcasp_set_pdata_from_of(pdev);
2047 dev_err(&pdev->dev, "no platform data\n");
2051 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
2053 dev_warn(mcasp->dev,
2054 "\"mpu\" mem resource not found, using index 0\n");
2055 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2057 dev_err(&pdev->dev, "no mem resource?\n");
2062 mcasp->base = devm_ioremap_resource(&pdev->dev, mem);
2063 if (IS_ERR(mcasp->base))
2064 return PTR_ERR(mcasp->base);
2066 pm_runtime_enable(&pdev->dev);
2068 mcasp->op_mode = pdata->op_mode;
2069 /* sanity check for tdm slots parameter */
2070 if (mcasp->op_mode == DAVINCI_MCASP_IIS_MODE) {
2071 if (pdata->tdm_slots < 2) {
2072 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
2074 mcasp->tdm_slots = 2;
2075 } else if (pdata->tdm_slots > 32) {
2076 dev_err(&pdev->dev, "invalid tdm slots: %d\n",
2078 mcasp->tdm_slots = 32;
2080 mcasp->tdm_slots = pdata->tdm_slots;
2084 mcasp->num_serializer = pdata->num_serializer;
2086 mcasp->context.xrsr_regs = devm_kcalloc(&pdev->dev,
2087 mcasp->num_serializer, sizeof(u32),
2089 if (!mcasp->context.xrsr_regs) {
2094 mcasp->serial_dir = pdata->serial_dir;
2095 mcasp->version = pdata->version;
2096 mcasp->txnumevt = pdata->txnumevt;
2097 mcasp->rxnumevt = pdata->rxnumevt;
2098 mcasp->dismod = pdata->dismod;
2100 mcasp->dev = &pdev->dev;
2102 irq = platform_get_irq_byname(pdev, "common");
2104 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_common",
2105 dev_name(&pdev->dev));
2110 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2111 davinci_mcasp_common_irq_handler,
2112 IRQF_ONESHOT | IRQF_SHARED,
2115 dev_err(&pdev->dev, "common IRQ request failed\n");
2119 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
2120 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
2123 irq = platform_get_irq_byname(pdev, "rx");
2125 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_rx",
2126 dev_name(&pdev->dev));
2131 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2132 davinci_mcasp_rx_irq_handler,
2133 IRQF_ONESHOT, irq_name, mcasp);
2135 dev_err(&pdev->dev, "RX IRQ request failed\n");
2139 mcasp->irq_request[SNDRV_PCM_STREAM_CAPTURE] = ROVRN;
2142 irq = platform_get_irq_byname(pdev, "tx");
2144 irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s_tx",
2145 dev_name(&pdev->dev));
2150 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
2151 davinci_mcasp_tx_irq_handler,
2152 IRQF_ONESHOT, irq_name, mcasp);
2154 dev_err(&pdev->dev, "TX IRQ request failed\n");
2158 mcasp->irq_request[SNDRV_PCM_STREAM_PLAYBACK] = XUNDRN;
2161 dat = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
2163 mcasp->dat_port = true;
2165 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
2167 dma_data->addr = dat->start;
2169 dma_data->addr = mem->start + davinci_mcasp_txdma_offset(pdata);
2171 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_PLAYBACK];
2172 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
2176 *dma = pdata->tx_dma_channel;
2178 /* dmaengine filter data for DT and non-DT boot */
2179 if (pdev->dev.of_node)
2180 dma_data->filter_data = "tx";
2182 dma_data->filter_data = dma;
2184 /* RX is not valid in DIT mode */
2185 if (mcasp->op_mode != DAVINCI_MCASP_DIT_MODE) {
2186 dma_data = &mcasp->dma_data[SNDRV_PCM_STREAM_CAPTURE];
2188 dma_data->addr = dat->start;
2191 mem->start + davinci_mcasp_rxdma_offset(pdata);
2193 dma = &mcasp->dma_request[SNDRV_PCM_STREAM_CAPTURE];
2194 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
2198 *dma = pdata->rx_dma_channel;
2200 /* dmaengine filter data for DT and non-DT boot */
2201 if (pdev->dev.of_node)
2202 dma_data->filter_data = "rx";
2204 dma_data->filter_data = dma;
2207 if (mcasp->version < MCASP_VERSION_3) {
2208 mcasp->fifo_base = DAVINCI_MCASP_V2_AFIFO_BASE;
2209 /* dma_params->dma_addr is pointing to the data port address */
2210 mcasp->dat_port = true;
2212 mcasp->fifo_base = DAVINCI_MCASP_V3_AFIFO_BASE;
2215 /* Allocate memory for long enough list for all possible
2216 * scenarios. Maximum number tdm slots is 32 and there cannot
2217 * be more serializers than given in the configuration. The
2218 * serializer directions could be taken into account, but it
2219 * would make code much more complex and save only couple of
2222 mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list =
2223 devm_kcalloc(mcasp->dev,
2224 32 + mcasp->num_serializer - 1,
2225 sizeof(unsigned int),
2228 mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list =
2229 devm_kcalloc(mcasp->dev,
2230 32 + mcasp->num_serializer - 1,
2231 sizeof(unsigned int),
2234 if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list ||
2235 !mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list) {
2240 ret = davinci_mcasp_set_ch_constraints(mcasp);
2244 dev_set_drvdata(&pdev->dev, mcasp);
2246 mcasp_reparent_fck(pdev);
2248 /* All PINS as McASP */
2249 pm_runtime_get_sync(mcasp->dev);
2250 mcasp_set_reg(mcasp, DAVINCI_MCASP_PFUNC_REG, 0x00000000);
2251 pm_runtime_put(mcasp->dev);
2253 ret = davinci_mcasp_init_gpiochip(mcasp);
2257 ret = davinci_mcasp_get_dt_params(mcasp);
2261 ret = devm_snd_soc_register_component(&pdev->dev,
2262 &davinci_mcasp_component,
2263 &davinci_mcasp_dai[pdata->op_mode], 1);
2268 ret = davinci_mcasp_get_dma_type(mcasp);
2271 ret = edma_pcm_platform_register(&pdev->dev);
2274 ret = sdma_pcm_platform_register(&pdev->dev, "tx", "rx");
2277 dev_err(&pdev->dev, "No DMA controller found (%d)\n", ret);
2284 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
2291 pm_runtime_disable(&pdev->dev);
2295 static int davinci_mcasp_remove(struct platform_device *pdev)
2297 pm_runtime_disable(&pdev->dev);
2303 static int davinci_mcasp_runtime_suspend(struct device *dev)
2305 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
2306 struct davinci_mcasp_context *context = &mcasp->context;
2310 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
2311 context->config_regs[i] = mcasp_get_reg(mcasp, context_regs[i]);
2313 if (mcasp->txnumevt) {
2314 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
2315 context->afifo_regs[0] = mcasp_get_reg(mcasp, reg);
2317 if (mcasp->rxnumevt) {
2318 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
2319 context->afifo_regs[1] = mcasp_get_reg(mcasp, reg);
2322 for (i = 0; i < mcasp->num_serializer; i++)
2323 context->xrsr_regs[i] = mcasp_get_reg(mcasp,
2324 DAVINCI_MCASP_XRSRCTL_REG(i));
2329 static int davinci_mcasp_runtime_resume(struct device *dev)
2331 struct davinci_mcasp *mcasp = dev_get_drvdata(dev);
2332 struct davinci_mcasp_context *context = &mcasp->context;
2336 for (i = 0; i < ARRAY_SIZE(context_regs); i++)
2337 mcasp_set_reg(mcasp, context_regs[i], context->config_regs[i]);
2339 if (mcasp->txnumevt) {
2340 reg = mcasp->fifo_base + MCASP_WFIFOCTL_OFFSET;
2341 mcasp_set_reg(mcasp, reg, context->afifo_regs[0]);
2343 if (mcasp->rxnumevt) {
2344 reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET;
2345 mcasp_set_reg(mcasp, reg, context->afifo_regs[1]);
2348 for (i = 0; i < mcasp->num_serializer; i++)
2349 mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i),
2350 context->xrsr_regs[i]);
2357 static const struct dev_pm_ops davinci_mcasp_pm_ops = {
2358 SET_RUNTIME_PM_OPS(davinci_mcasp_runtime_suspend,
2359 davinci_mcasp_runtime_resume,
2363 static struct platform_driver davinci_mcasp_driver = {
2364 .probe = davinci_mcasp_probe,
2365 .remove = davinci_mcasp_remove,
2367 .name = "davinci-mcasp",
2368 .pm = &davinci_mcasp_pm_ops,
2369 .of_match_table = mcasp_dt_ids,
2373 module_platform_driver(davinci_mcasp_driver);
2375 MODULE_AUTHOR("Steve Chen");
2376 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
2377 MODULE_LICENSE("GPL");