2 * ALSA SoC McASP Audio Layer for TI DAVINCI processor
4 * Multi-channel Audio Serial Port Driver
6 * Author: Nirmal Pandey <n-pandey@ti.com>,
7 * Suresh Rajashekara <suresh.r@ti.com>
8 * Steve Chen <schen@.mvista.com>
10 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
11 * Copyright: (C) 2009 Texas Instruments, India
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/init.h>
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/slab.h>
22 #include <linux/delay.h>
24 #include <linux/pm_runtime.h>
26 #include <linux/of_platform.h>
27 #include <linux/of_device.h>
29 #include <sound/core.h>
30 #include <sound/pcm.h>
31 #include <sound/pcm_params.h>
32 #include <sound/initval.h>
33 #include <sound/soc.h>
35 #include "davinci-pcm.h"
36 #include "davinci-mcasp.h"
39 * McASP register definitions
41 #define DAVINCI_MCASP_PID_REG 0x00
42 #define DAVINCI_MCASP_PWREMUMGT_REG 0x04
44 #define DAVINCI_MCASP_PFUNC_REG 0x10
45 #define DAVINCI_MCASP_PDIR_REG 0x14
46 #define DAVINCI_MCASP_PDOUT_REG 0x18
47 #define DAVINCI_MCASP_PDSET_REG 0x1c
49 #define DAVINCI_MCASP_PDCLR_REG 0x20
51 #define DAVINCI_MCASP_TLGC_REG 0x30
52 #define DAVINCI_MCASP_TLMR_REG 0x34
54 #define DAVINCI_MCASP_GBLCTL_REG 0x44
55 #define DAVINCI_MCASP_AMUTE_REG 0x48
56 #define DAVINCI_MCASP_LBCTL_REG 0x4c
58 #define DAVINCI_MCASP_TXDITCTL_REG 0x50
60 #define DAVINCI_MCASP_GBLCTLR_REG 0x60
61 #define DAVINCI_MCASP_RXMASK_REG 0x64
62 #define DAVINCI_MCASP_RXFMT_REG 0x68
63 #define DAVINCI_MCASP_RXFMCTL_REG 0x6c
65 #define DAVINCI_MCASP_ACLKRCTL_REG 0x70
66 #define DAVINCI_MCASP_AHCLKRCTL_REG 0x74
67 #define DAVINCI_MCASP_RXTDM_REG 0x78
68 #define DAVINCI_MCASP_EVTCTLR_REG 0x7c
70 #define DAVINCI_MCASP_RXSTAT_REG 0x80
71 #define DAVINCI_MCASP_RXTDMSLOT_REG 0x84
72 #define DAVINCI_MCASP_RXCLKCHK_REG 0x88
73 #define DAVINCI_MCASP_REVTCTL_REG 0x8c
75 #define DAVINCI_MCASP_GBLCTLX_REG 0xa0
76 #define DAVINCI_MCASP_TXMASK_REG 0xa4
77 #define DAVINCI_MCASP_TXFMT_REG 0xa8
78 #define DAVINCI_MCASP_TXFMCTL_REG 0xac
80 #define DAVINCI_MCASP_ACLKXCTL_REG 0xb0
81 #define DAVINCI_MCASP_AHCLKXCTL_REG 0xb4
82 #define DAVINCI_MCASP_TXTDM_REG 0xb8
83 #define DAVINCI_MCASP_EVTCTLX_REG 0xbc
85 #define DAVINCI_MCASP_TXSTAT_REG 0xc0
86 #define DAVINCI_MCASP_TXTDMSLOT_REG 0xc4
87 #define DAVINCI_MCASP_TXCLKCHK_REG 0xc8
88 #define DAVINCI_MCASP_XEVTCTL_REG 0xcc
90 /* Left(even TDM Slot) Channel Status Register File */
91 #define DAVINCI_MCASP_DITCSRA_REG 0x100
92 /* Right(odd TDM slot) Channel Status Register File */
93 #define DAVINCI_MCASP_DITCSRB_REG 0x118
94 /* Left(even TDM slot) User Data Register File */
95 #define DAVINCI_MCASP_DITUDRA_REG 0x130
96 /* Right(odd TDM Slot) User Data Register File */
97 #define DAVINCI_MCASP_DITUDRB_REG 0x148
99 /* Serializer n Control Register */
100 #define DAVINCI_MCASP_XRSRCTL_BASE_REG 0x180
101 #define DAVINCI_MCASP_XRSRCTL_REG(n) (DAVINCI_MCASP_XRSRCTL_BASE_REG + \
104 /* Transmit Buffer for Serializer n */
105 #define DAVINCI_MCASP_TXBUF_REG 0x200
106 /* Receive Buffer for Serializer n */
107 #define DAVINCI_MCASP_RXBUF_REG 0x280
109 /* McASP FIFO Registers */
110 #define DAVINCI_MCASP_WFIFOCTL (0x1010)
111 #define DAVINCI_MCASP_WFIFOSTS (0x1014)
112 #define DAVINCI_MCASP_RFIFOCTL (0x1018)
113 #define DAVINCI_MCASP_RFIFOSTS (0x101C)
114 #define MCASP_VER3_WFIFOCTL (0x1000)
115 #define MCASP_VER3_WFIFOSTS (0x1004)
116 #define MCASP_VER3_RFIFOCTL (0x1008)
117 #define MCASP_VER3_RFIFOSTS (0x100C)
120 * DAVINCI_MCASP_PWREMUMGT_REG - Power Down and Emulation Management
123 #define MCASP_FREE BIT(0)
124 #define MCASP_SOFT BIT(1)
127 * DAVINCI_MCASP_PFUNC_REG - Pin Function / GPIO Enable Register Bits
129 #define AXR(n) (1<<n)
130 #define PFUNC_AMUTE BIT(25)
131 #define ACLKX BIT(26)
132 #define AHCLKX BIT(27)
134 #define ACLKR BIT(29)
135 #define AHCLKR BIT(30)
139 * DAVINCI_MCASP_PDIR_REG - Pin Direction Register Bits
141 #define AXR(n) (1<<n)
142 #define PDIR_AMUTE BIT(25)
143 #define ACLKX BIT(26)
144 #define AHCLKX BIT(27)
146 #define ACLKR BIT(29)
147 #define AHCLKR BIT(30)
151 * DAVINCI_MCASP_TXDITCTL_REG - Transmit DIT Control Register Bits
153 #define DITEN BIT(0) /* Transmit DIT mode enable/disable */
158 * DAVINCI_MCASP_TXFMT_REG - Transmit Bitstream Format Register Bits
160 #define TXROT(val) (val)
162 #define TXSSZ(val) (val<<4)
163 #define TXPBIT(val) (val<<8)
164 #define TXPAD(val) (val<<13)
165 #define TXORD BIT(15)
166 #define FSXDLY(val) (val<<16)
169 * DAVINCI_MCASP_RXFMT_REG - Receive Bitstream Format Register Bits
171 #define RXROT(val) (val)
173 #define RXSSZ(val) (val<<4)
174 #define RXPBIT(val) (val<<8)
175 #define RXPAD(val) (val<<13)
176 #define RXORD BIT(15)
177 #define FSRDLY(val) (val<<16)
180 * DAVINCI_MCASP_TXFMCTL_REG - Transmit Frame Control Register Bits
182 #define FSXPOL BIT(0)
184 #define FSXDUR BIT(4)
185 #define FSXMOD(val) (val<<7)
188 * DAVINCI_MCASP_RXFMCTL_REG - Receive Frame Control Register Bits
190 #define FSRPOL BIT(0)
192 #define FSRDUR BIT(4)
193 #define FSRMOD(val) (val<<7)
196 * DAVINCI_MCASP_ACLKXCTL_REG - Transmit Clock Control Register Bits
198 #define ACLKXDIV(val) (val)
199 #define ACLKXE BIT(5)
200 #define TX_ASYNC BIT(6)
201 #define ACLKXPOL BIT(7)
202 #define ACLKXDIV_MASK 0x1f
205 * DAVINCI_MCASP_ACLKRCTL_REG Receive Clock Control Register Bits
207 #define ACLKRDIV(val) (val)
208 #define ACLKRE BIT(5)
209 #define RX_ASYNC BIT(6)
210 #define ACLKRPOL BIT(7)
211 #define ACLKRDIV_MASK 0x1f
214 * DAVINCI_MCASP_AHCLKXCTL_REG - High Frequency Transmit Clock Control
217 #define AHCLKXDIV(val) (val)
218 #define AHCLKXPOL BIT(14)
219 #define AHCLKXE BIT(15)
220 #define AHCLKXDIV_MASK 0xfff
223 * DAVINCI_MCASP_AHCLKRCTL_REG - High Frequency Receive Clock Control
226 #define AHCLKRDIV(val) (val)
227 #define AHCLKRPOL BIT(14)
228 #define AHCLKRE BIT(15)
229 #define AHCLKRDIV_MASK 0xfff
232 * DAVINCI_MCASP_XRSRCTL_BASE_REG - Serializer Control Register Bits
234 #define MODE(val) (val)
235 #define DISMOD (val)(val<<2)
236 #define TXSTATE BIT(4)
237 #define RXSTATE BIT(5)
240 * DAVINCI_MCASP_LBCTL_REG - Loop Back Control Register Bits
244 #define LBGENMODE(val) (val<<2)
247 * DAVINCI_MCASP_TXTDMSLOT_REG - Transmit TDM Slot Register configuration
249 #define TXTDMS(n) (1<<n)
252 * DAVINCI_MCASP_RXTDMSLOT_REG - Receive TDM Slot Register configuration
254 #define RXTDMS(n) (1<<n)
257 * DAVINCI_MCASP_GBLCTL_REG - Global Control Register Bits
259 #define RXCLKRST BIT(0) /* Receiver Clock Divider Reset */
260 #define RXHCLKRST BIT(1) /* Receiver High Frequency Clock Divider */
261 #define RXSERCLR BIT(2) /* Receiver Serializer Clear */
262 #define RXSMRST BIT(3) /* Receiver State Machine Reset */
263 #define RXFSRST BIT(4) /* Frame Sync Generator Reset */
264 #define TXCLKRST BIT(8) /* Transmitter Clock Divider Reset */
265 #define TXHCLKRST BIT(9) /* Transmitter High Frequency Clock Divider*/
266 #define TXSERCLR BIT(10) /* Transmit Serializer Clear */
267 #define TXSMRST BIT(11) /* Transmitter State Machine Reset */
268 #define TXFSRST BIT(12) /* Frame Sync Generator Reset */
271 * DAVINCI_MCASP_AMUTE_REG - Mute Control Register Bits
273 #define MUTENA(val) (val)
274 #define MUTEINPOL BIT(2)
275 #define MUTEINENA BIT(3)
276 #define MUTEIN BIT(4)
279 #define MUTEFSR BIT(7)
280 #define MUTEFSX BIT(8)
281 #define MUTEBADCLKR BIT(9)
282 #define MUTEBADCLKX BIT(10)
283 #define MUTERXDMAERR BIT(11)
284 #define MUTETXDMAERR BIT(12)
287 * DAVINCI_MCASP_REVTCTL_REG - Receiver DMA Event Control Register bits
289 #define RXDATADMADIS BIT(0)
292 * DAVINCI_MCASP_XEVTCTL_REG - Transmitter DMA Event Control Register bits
294 #define TXDATADMADIS BIT(0)
297 * DAVINCI_MCASP_W[R]FIFOCTL - Write/Read FIFO Control Register bits
299 #define FIFO_ENABLE BIT(16)
300 #define NUMEVT_MASK (0xFF << 8)
301 #define NUMDMA_MASK (0xFF)
303 #define DAVINCI_MCASP_NUM_SERIALIZER 16
305 static inline void mcasp_set_bits(void __iomem *reg, u32 val)
307 __raw_writel(__raw_readl(reg) | val, reg);
310 static inline void mcasp_clr_bits(void __iomem *reg, u32 val)
312 __raw_writel((__raw_readl(reg) & ~(val)), reg);
315 static inline void mcasp_mod_bits(void __iomem *reg, u32 val, u32 mask)
317 __raw_writel((__raw_readl(reg) & ~mask) | val, reg);
320 static inline void mcasp_set_reg(void __iomem *reg, u32 val)
322 __raw_writel(val, reg);
325 static inline u32 mcasp_get_reg(void __iomem *reg)
327 return (unsigned int)__raw_readl(reg);
330 static inline void mcasp_set_ctl_reg(void __iomem *regs, u32 val)
334 mcasp_set_bits(regs, val);
336 /* programming GBLCTL needs to read back from GBLCTL and verfiy */
337 /* loop count is to avoid the lock-up */
338 for (i = 0; i < 1000; i++) {
339 if ((mcasp_get_reg(regs) & val) == val)
343 if (i == 1000 && ((mcasp_get_reg(regs) & val) != val))
344 printk(KERN_ERR "GBLCTL write error\n");
347 static void mcasp_start_rx(struct davinci_audio_dev *dev)
349 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXHCLKRST);
350 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXCLKRST);
351 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSERCLR);
352 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXBUF_REG, 0);
354 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
355 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
356 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXBUF_REG, 0);
358 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXSMRST);
359 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, RXFSRST);
362 static void mcasp_start_tx(struct davinci_audio_dev *dev)
367 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXHCLKRST);
368 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXCLKRST);
369 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSERCLR);
370 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
372 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXSMRST);
373 mcasp_set_ctl_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, TXFSRST);
374 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
375 for (i = 0; i < dev->num_serializer; i++) {
376 if (dev->serial_dir[i] == TX_MODE) {
382 /* wait for TX ready */
384 while (!(mcasp_get_reg(dev->base + DAVINCI_MCASP_XRSRCTL_REG(offset)) &
385 TXSTATE) && (cnt < 100000))
388 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXBUF_REG, 0);
391 static void davinci_mcasp_start(struct davinci_audio_dev *dev, int stream)
393 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
394 if (dev->txnumevt) { /* enable FIFO */
395 switch (dev->version) {
396 case MCASP_VERSION_3:
397 mcasp_clr_bits(dev->base + MCASP_VER3_WFIFOCTL,
399 mcasp_set_bits(dev->base + MCASP_VER3_WFIFOCTL,
403 mcasp_clr_bits(dev->base +
404 DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
405 mcasp_set_bits(dev->base +
406 DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
411 if (dev->rxnumevt) { /* enable FIFO */
412 switch (dev->version) {
413 case MCASP_VERSION_3:
414 mcasp_clr_bits(dev->base + MCASP_VER3_RFIFOCTL,
416 mcasp_set_bits(dev->base + MCASP_VER3_RFIFOCTL,
420 mcasp_clr_bits(dev->base +
421 DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
422 mcasp_set_bits(dev->base +
423 DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
430 static void mcasp_stop_rx(struct davinci_audio_dev *dev)
432 mcasp_set_reg(dev->base + DAVINCI_MCASP_GBLCTLR_REG, 0);
433 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
436 static void mcasp_stop_tx(struct davinci_audio_dev *dev)
438 mcasp_set_reg(dev->base + DAVINCI_MCASP_GBLCTLX_REG, 0);
439 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
442 static void davinci_mcasp_stop(struct davinci_audio_dev *dev, int stream)
444 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
445 if (dev->txnumevt) { /* disable FIFO */
446 switch (dev->version) {
447 case MCASP_VERSION_3:
448 mcasp_clr_bits(dev->base + MCASP_VER3_WFIFOCTL,
452 mcasp_clr_bits(dev->base +
453 DAVINCI_MCASP_WFIFOCTL, FIFO_ENABLE);
458 if (dev->rxnumevt) { /* disable FIFO */
459 switch (dev->version) {
460 case MCASP_VERSION_3:
461 mcasp_clr_bits(dev->base + MCASP_VER3_RFIFOCTL,
466 mcasp_clr_bits(dev->base +
467 DAVINCI_MCASP_RFIFOCTL, FIFO_ENABLE);
474 static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
477 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
478 void __iomem *base = dev->base;
480 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
481 case SND_SOC_DAIFMT_DSP_B:
482 case SND_SOC_DAIFMT_AC97:
483 mcasp_clr_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
484 mcasp_clr_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
487 /* configure a full-word SYNC pulse (LRCLK) */
488 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
489 mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
491 /* make 1st data bit occur one ACLK cycle after the frame sync */
492 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, FSXDLY(1));
493 mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, FSRDLY(1));
497 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
498 case SND_SOC_DAIFMT_CBS_CFS:
499 /* codec is clock and frame slave */
500 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
501 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
503 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
504 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
506 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG, ACLKX | AFSX);
508 case SND_SOC_DAIFMT_CBM_CFS:
509 /* codec is clock master and frame slave */
510 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
511 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
513 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
514 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
516 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
518 mcasp_set_bits(base + DAVINCI_MCASP_PDIR_REG,
521 case SND_SOC_DAIFMT_CBM_CFM:
522 /* codec is clock and frame master */
523 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXE);
524 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, AFSXE);
526 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRE);
527 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, AFSRE);
529 mcasp_clr_bits(base + DAVINCI_MCASP_PDIR_REG,
530 ACLKX | AHCLKX | AFSX | ACLKR | AHCLKR | AFSR);
537 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
538 case SND_SOC_DAIFMT_IB_NF:
539 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
540 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
542 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
543 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
546 case SND_SOC_DAIFMT_NB_IF:
547 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
548 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
550 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
551 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
554 case SND_SOC_DAIFMT_IB_IF:
555 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
556 mcasp_set_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
558 mcasp_set_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
559 mcasp_set_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
562 case SND_SOC_DAIFMT_NB_NF:
563 mcasp_set_bits(base + DAVINCI_MCASP_ACLKXCTL_REG, ACLKXPOL);
564 mcasp_clr_bits(base + DAVINCI_MCASP_TXFMCTL_REG, FSXPOL);
566 mcasp_clr_bits(base + DAVINCI_MCASP_ACLKRCTL_REG, ACLKRPOL);
567 mcasp_clr_bits(base + DAVINCI_MCASP_RXFMCTL_REG, FSRPOL);
577 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
579 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
582 case 0: /* MCLK divider */
583 mcasp_mod_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG,
584 AHCLKXDIV(div - 1), AHCLKXDIV_MASK);
585 mcasp_mod_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG,
586 AHCLKRDIV(div - 1), AHCLKRDIV_MASK);
589 case 1: /* BCLK divider */
590 mcasp_mod_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG,
591 ACLKXDIV(div - 1), ACLKXDIV_MASK);
592 mcasp_mod_bits(dev->base + DAVINCI_MCASP_ACLKRCTL_REG,
593 ACLKRDIV(div - 1), ACLKRDIV_MASK);
603 static int davinci_mcasp_set_sysclk(struct snd_soc_dai *dai, int clk_id,
604 unsigned int freq, int dir)
606 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
608 if (dir == SND_SOC_CLOCK_OUT) {
609 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
610 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
611 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
613 mcasp_clr_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXE);
614 mcasp_clr_bits(dev->base + DAVINCI_MCASP_AHCLKRCTL_REG, AHCLKRE);
615 mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AHCLKX);
621 static int davinci_config_channel_size(struct davinci_audio_dev *dev,
627 switch (channel_size) {
628 case DAVINCI_AUDIO_WORD_8:
634 case DAVINCI_AUDIO_WORD_12:
640 case DAVINCI_AUDIO_WORD_16:
646 case DAVINCI_AUDIO_WORD_20:
652 case DAVINCI_AUDIO_WORD_24:
658 case DAVINCI_AUDIO_WORD_28:
664 case DAVINCI_AUDIO_WORD_32:
674 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG,
675 RXSSZ(fmt), RXSSZ(0x0F));
676 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
677 TXSSZ(fmt), TXSSZ(0x0F));
678 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXROT(rotate),
680 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXROT(rotate),
682 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, mask);
683 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXMASK_REG, mask);
688 static void davinci_hw_common_param(struct davinci_audio_dev *dev, int stream)
694 /* Default configuration */
695 mcasp_set_bits(dev->base + DAVINCI_MCASP_PWREMUMGT_REG, MCASP_SOFT);
697 /* All PINS as McASP */
698 mcasp_set_reg(dev->base + DAVINCI_MCASP_PFUNC_REG, 0x00000000);
700 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
701 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXSTAT_REG, 0xFFFFFFFF);
702 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG,
705 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXSTAT_REG, 0xFFFFFFFF);
706 mcasp_clr_bits(dev->base + DAVINCI_MCASP_REVTCTL_REG,
710 for (i = 0; i < dev->num_serializer; i++) {
711 mcasp_set_bits(dev->base + DAVINCI_MCASP_XRSRCTL_REG(i),
713 if (dev->serial_dir[i] == TX_MODE) {
714 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
717 } else if (dev->serial_dir[i] == RX_MODE) {
718 mcasp_clr_bits(dev->base + DAVINCI_MCASP_PDIR_REG,
724 if (dev->txnumevt && stream == SNDRV_PCM_STREAM_PLAYBACK) {
725 if (dev->txnumevt * tx_ser > 64)
728 switch (dev->version) {
729 case MCASP_VERSION_3:
730 mcasp_mod_bits(dev->base + MCASP_VER3_WFIFOCTL, tx_ser,
732 mcasp_mod_bits(dev->base + MCASP_VER3_WFIFOCTL,
733 ((dev->txnumevt * tx_ser) << 8), NUMEVT_MASK);
736 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
737 tx_ser, NUMDMA_MASK);
738 mcasp_mod_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
739 ((dev->txnumevt * tx_ser) << 8), NUMEVT_MASK);
743 if (dev->rxnumevt && stream == SNDRV_PCM_STREAM_CAPTURE) {
744 if (dev->rxnumevt * rx_ser > 64)
746 switch (dev->version) {
747 case MCASP_VERSION_3:
748 mcasp_mod_bits(dev->base + MCASP_VER3_RFIFOCTL, rx_ser,
750 mcasp_mod_bits(dev->base + MCASP_VER3_RFIFOCTL,
751 ((dev->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
754 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
755 rx_ser, NUMDMA_MASK);
756 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
757 ((dev->rxnumevt * rx_ser) << 8), NUMEVT_MASK);
762 static void davinci_hw_param(struct davinci_audio_dev *dev, int stream)
767 active_slots = (dev->tdm_slots > 31) ? 32 : dev->tdm_slots;
768 for (i = 0; i < active_slots; i++)
771 mcasp_clr_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG, TX_ASYNC);
773 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
774 /* bit stream is MSB first with no delay */
776 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, mask);
777 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG, TXORD);
779 if ((dev->tdm_slots >= 2) && (dev->tdm_slots <= 32))
780 mcasp_mod_bits(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
781 FSXMOD(dev->tdm_slots), FSXMOD(0x1FF));
783 printk(KERN_ERR "playback tdm slot %d not supported\n",
786 /* bit stream is MSB first with no delay */
788 mcasp_set_bits(dev->base + DAVINCI_MCASP_RXFMT_REG, RXORD);
789 mcasp_set_reg(dev->base + DAVINCI_MCASP_RXTDM_REG, mask);
791 if ((dev->tdm_slots >= 2) && (dev->tdm_slots <= 32))
792 mcasp_mod_bits(dev->base + DAVINCI_MCASP_RXFMCTL_REG,
793 FSRMOD(dev->tdm_slots), FSRMOD(0x1FF));
795 printk(KERN_ERR "capture tdm slot %d not supported\n",
801 static void davinci_hw_dit_param(struct davinci_audio_dev *dev)
803 /* Set the PDIR for Serialiser as output */
804 mcasp_set_bits(dev->base + DAVINCI_MCASP_PDIR_REG, AFSX);
806 /* TXMASK for 24 bits */
807 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXMASK_REG, 0x00FFFFFF);
809 /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
811 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXFMT_REG,
812 TXROT(6) | TXSSZ(15));
814 /* Set TX frame synch : DIT Mode, 1 bit width, internal, rising edge */
815 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXFMCTL_REG,
816 AFSXE | FSXMOD(0x180));
818 /* Set the TX tdm : for all the slots */
819 mcasp_set_reg(dev->base + DAVINCI_MCASP_TXTDM_REG, 0xFFFFFFFF);
821 /* Set the TX clock controls : div = 1 and internal */
822 mcasp_set_bits(dev->base + DAVINCI_MCASP_ACLKXCTL_REG,
825 mcasp_clr_bits(dev->base + DAVINCI_MCASP_XEVTCTL_REG, TXDATADMADIS);
827 /* Only 44100 and 48000 are valid, both have the same setting */
828 mcasp_set_bits(dev->base + DAVINCI_MCASP_AHCLKXCTL_REG, AHCLKXDIV(3));
831 mcasp_set_bits(dev->base + DAVINCI_MCASP_TXDITCTL_REG, DITEN);
834 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
835 struct snd_pcm_hw_params *params,
836 struct snd_soc_dai *cpu_dai)
838 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
839 struct davinci_pcm_dma_params *dma_params =
840 &dev->dma_params[substream->stream];
844 davinci_hw_common_param(dev, substream->stream);
845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
846 fifo_level = dev->txnumevt;
848 fifo_level = dev->rxnumevt;
850 if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
851 davinci_hw_dit_param(dev);
853 davinci_hw_param(dev, substream->stream);
855 switch (params_format(params)) {
856 case SNDRV_PCM_FORMAT_U8:
857 case SNDRV_PCM_FORMAT_S8:
858 dma_params->data_type = 1;
859 word_length = DAVINCI_AUDIO_WORD_8;
862 case SNDRV_PCM_FORMAT_U16_LE:
863 case SNDRV_PCM_FORMAT_S16_LE:
864 dma_params->data_type = 2;
865 word_length = DAVINCI_AUDIO_WORD_16;
868 case SNDRV_PCM_FORMAT_U24_3LE:
869 case SNDRV_PCM_FORMAT_S24_3LE:
870 dma_params->data_type = 3;
871 word_length = DAVINCI_AUDIO_WORD_24;
874 case SNDRV_PCM_FORMAT_U24_LE:
875 case SNDRV_PCM_FORMAT_S24_LE:
876 case SNDRV_PCM_FORMAT_U32_LE:
877 case SNDRV_PCM_FORMAT_S32_LE:
878 dma_params->data_type = 4;
879 word_length = DAVINCI_AUDIO_WORD_32;
883 printk(KERN_WARNING "davinci-mcasp: unsupported PCM format");
887 if (dev->version == MCASP_VERSION_2 && !fifo_level)
888 dma_params->acnt = 4;
890 dma_params->acnt = dma_params->data_type;
892 dma_params->fifo_level = fifo_level;
893 davinci_config_channel_size(dev, word_length);
898 static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
899 int cmd, struct snd_soc_dai *cpu_dai)
901 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
905 case SNDRV_PCM_TRIGGER_RESUME:
906 case SNDRV_PCM_TRIGGER_START:
907 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
908 ret = pm_runtime_get_sync(dev->dev);
909 if (IS_ERR_VALUE(ret))
910 dev_err(dev->dev, "pm_runtime_get_sync() failed\n");
911 davinci_mcasp_start(dev, substream->stream);
914 case SNDRV_PCM_TRIGGER_SUSPEND:
915 davinci_mcasp_stop(dev, substream->stream);
916 ret = pm_runtime_put_sync(dev->dev);
917 if (IS_ERR_VALUE(ret))
918 dev_err(dev->dev, "pm_runtime_put_sync() failed\n");
921 case SNDRV_PCM_TRIGGER_STOP:
922 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
923 davinci_mcasp_stop(dev, substream->stream);
933 static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
934 struct snd_soc_dai *dai)
936 struct davinci_audio_dev *dev = snd_soc_dai_get_drvdata(dai);
938 snd_soc_dai_set_dma_data(dai, substream, dev->dma_params);
942 static const struct snd_soc_dai_ops davinci_mcasp_dai_ops = {
943 .startup = davinci_mcasp_startup,
944 .trigger = davinci_mcasp_trigger,
945 .hw_params = davinci_mcasp_hw_params,
946 .set_fmt = davinci_mcasp_set_dai_fmt,
947 .set_clkdiv = davinci_mcasp_set_clkdiv,
948 .set_sysclk = davinci_mcasp_set_sysclk,
951 #define DAVINCI_MCASP_PCM_FMTS (SNDRV_PCM_FMTBIT_S8 | \
952 SNDRV_PCM_FMTBIT_U8 | \
953 SNDRV_PCM_FMTBIT_S16_LE | \
954 SNDRV_PCM_FMTBIT_U16_LE | \
955 SNDRV_PCM_FMTBIT_S24_LE | \
956 SNDRV_PCM_FMTBIT_U24_LE | \
957 SNDRV_PCM_FMTBIT_S24_3LE | \
958 SNDRV_PCM_FMTBIT_U24_3LE | \
959 SNDRV_PCM_FMTBIT_S32_LE | \
960 SNDRV_PCM_FMTBIT_U32_LE)
962 static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
964 .name = "davinci-mcasp.0",
968 .rates = DAVINCI_MCASP_RATES,
969 .formats = DAVINCI_MCASP_PCM_FMTS,
974 .rates = DAVINCI_MCASP_RATES,
975 .formats = DAVINCI_MCASP_PCM_FMTS,
977 .ops = &davinci_mcasp_dai_ops,
985 .rates = DAVINCI_MCASP_RATES,
986 .formats = DAVINCI_MCASP_PCM_FMTS,
988 .ops = &davinci_mcasp_dai_ops,
993 static const struct of_device_id mcasp_dt_ids[] = {
995 .compatible = "ti,dm646x-mcasp-audio",
996 .data = (void *)MCASP_VERSION_1,
999 .compatible = "ti,da830-mcasp-audio",
1000 .data = (void *)MCASP_VERSION_2,
1003 .compatible = "ti,omap2-mcasp-audio",
1004 .data = (void *)MCASP_VERSION_3,
1008 MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
1010 static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
1011 struct platform_device *pdev)
1013 struct device_node *np = pdev->dev.of_node;
1014 struct snd_platform_data *pdata = NULL;
1015 const struct of_device_id *match =
1016 of_match_device(of_match_ptr(mcasp_dt_ids), &pdev->dev);
1018 const u32 *of_serial_dir32;
1023 if (pdev->dev.platform_data) {
1024 pdata = pdev->dev.platform_data;
1027 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
1033 /* control shouldn't reach here. something is wrong */
1039 pdata->version = (u8)((int)match->data);
1041 ret = of_property_read_u32(np, "op-mode", &val);
1043 pdata->op_mode = val;
1045 ret = of_property_read_u32(np, "tdm-slots", &val);
1047 pdata->tdm_slots = val;
1049 ret = of_property_read_u32(np, "num-serializer", &val);
1051 pdata->num_serializer = val;
1053 of_serial_dir32 = of_get_property(np, "serial-dir", &val);
1055 if (val != pdata->num_serializer) {
1057 "num-serializer(%d) != serial-dir size(%d)\n",
1058 pdata->num_serializer, val);
1063 if (of_serial_dir32) {
1064 of_serial_dir = devm_kzalloc(&pdev->dev,
1065 (sizeof(*of_serial_dir) * val),
1067 if (!of_serial_dir) {
1072 for (i = 0; i < pdata->num_serializer; i++)
1073 of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
1075 pdata->serial_dir = of_serial_dir;
1078 ret = of_property_read_u32(np, "tx-num-evt", &val);
1080 pdata->txnumevt = val;
1082 ret = of_property_read_u32(np, "rx-num-evt", &val);
1084 pdata->rxnumevt = val;
1086 ret = of_property_read_u32(np, "sram-size-playback", &val);
1088 pdata->sram_size_playback = val;
1090 ret = of_property_read_u32(np, "sram-size-capture", &val);
1092 pdata->sram_size_capture = val;
1098 dev_err(&pdev->dev, "Error populating platform data, err %d\n",
1105 static int davinci_mcasp_probe(struct platform_device *pdev)
1107 struct davinci_pcm_dma_params *dma_data;
1108 struct resource *mem, *ioarea, *res;
1109 struct snd_platform_data *pdata;
1110 struct davinci_audio_dev *dev;
1113 if (!pdev->dev.platform_data && !pdev->dev.of_node) {
1114 dev_err(&pdev->dev, "No platform data supplied\n");
1118 dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_audio_dev),
1123 pdata = davinci_mcasp_set_pdata_from_of(pdev);
1125 dev_err(&pdev->dev, "no platform data\n");
1129 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1131 dev_err(&pdev->dev, "no mem resource?\n");
1135 ioarea = devm_request_mem_region(&pdev->dev, mem->start,
1136 resource_size(mem), pdev->name);
1138 dev_err(&pdev->dev, "Audio region already claimed\n");
1142 pm_runtime_enable(&pdev->dev);
1144 ret = pm_runtime_get_sync(&pdev->dev);
1145 if (IS_ERR_VALUE(ret)) {
1146 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
1150 dev->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
1152 dev_err(&pdev->dev, "ioremap failed\n");
1154 goto err_release_clk;
1157 dev->op_mode = pdata->op_mode;
1158 dev->tdm_slots = pdata->tdm_slots;
1159 dev->num_serializer = pdata->num_serializer;
1160 dev->serial_dir = pdata->serial_dir;
1161 dev->codec_fmt = pdata->codec_fmt;
1162 dev->version = pdata->version;
1163 dev->txnumevt = pdata->txnumevt;
1164 dev->rxnumevt = pdata->rxnumevt;
1165 dev->dev = &pdev->dev;
1167 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
1168 dma_data->asp_chan_q = pdata->asp_chan_q;
1169 dma_data->ram_chan_q = pdata->ram_chan_q;
1170 dma_data->sram_pool = pdata->sram_pool;
1171 dma_data->sram_size = pdata->sram_size_playback;
1172 dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
1175 /* first TX, then RX */
1176 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1178 dev_err(&pdev->dev, "no DMA resource\n");
1180 goto err_release_clk;
1183 dma_data->channel = res->start;
1185 dma_data = &dev->dma_params[SNDRV_PCM_STREAM_CAPTURE];
1186 dma_data->asp_chan_q = pdata->asp_chan_q;
1187 dma_data->ram_chan_q = pdata->ram_chan_q;
1188 dma_data->sram_pool = pdata->sram_pool;
1189 dma_data->sram_size = pdata->sram_size_capture;
1190 dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
1193 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1195 dev_err(&pdev->dev, "no DMA resource\n");
1197 goto err_release_clk;
1200 dma_data->channel = res->start;
1201 dev_set_drvdata(&pdev->dev, dev);
1202 ret = snd_soc_register_dai(&pdev->dev, &davinci_mcasp_dai[pdata->op_mode]);
1205 goto err_release_clk;
1207 ret = davinci_soc_platform_register(&pdev->dev);
1209 dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
1210 goto err_unregister_dai;
1216 snd_soc_unregister_dai(&pdev->dev);
1218 pm_runtime_put_sync(&pdev->dev);
1219 pm_runtime_disable(&pdev->dev);
1223 static int davinci_mcasp_remove(struct platform_device *pdev)
1226 snd_soc_unregister_dai(&pdev->dev);
1227 davinci_soc_platform_unregister(&pdev->dev);
1229 pm_runtime_put_sync(&pdev->dev);
1230 pm_runtime_disable(&pdev->dev);
1235 static struct platform_driver davinci_mcasp_driver = {
1236 .probe = davinci_mcasp_probe,
1237 .remove = davinci_mcasp_remove,
1239 .name = "davinci-mcasp",
1240 .owner = THIS_MODULE,
1241 .of_match_table = of_match_ptr(mcasp_dt_ids),
1245 module_platform_driver(davinci_mcasp_driver);
1247 MODULE_AUTHOR("Steve Chen");
1248 MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
1249 MODULE_LICENSE("GPL");