1 /* sound/soc/samsung/i2s.c
3 * ALSA SoC Audio Layer - Samsung I2S Controller driver
5 * Copyright (c) 2010 Samsung Electronics Co. Ltd.
6 * Jaswinder Singh <jassisinghbrar@gmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/delay.h>
14 #include <linux/slab.h>
15 #include <linux/clk.h>
17 #include <linux/module.h>
19 #include <linux/of_gpio.h>
20 #include <linux/pm_runtime.h>
22 #include <sound/soc.h>
23 #include <sound/pcm_params.h>
25 #include <linux/platform_data/asoc-s3c.h>
32 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
34 enum samsung_dai_type
{
39 struct samsung_i2s_dai_data
{
45 /* Platform device for this DAI */
46 struct platform_device
*pdev
;
49 /* Physical base address of SFRs */
51 /* Rate of RCLK source clock */
52 unsigned long rclk_srcrate
;
56 * Specifically requested RCLK,BCLK by MACHINE Driver.
57 * 0 indicates CPU driver is free to choose any value.
60 /* I2S Controller's core clock */
62 /* Clock for generating I2S signals */
64 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
65 struct i2s_dai
*pri_dai
;
66 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
67 struct i2s_dai
*sec_dai
;
68 #define DAI_OPENED (1 << 0) /* Dai is opened */
69 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
71 /* Driver for this DAI */
72 struct snd_soc_dai_driver i2s_dai_drv
;
74 struct s3c_dma_params dma_playback
;
75 struct s3c_dma_params dma_capture
;
76 struct s3c_dma_params idma_playback
;
81 unsigned long gpios
[7]; /* i2s gpio line numbers */
84 /* Lock for cross i/f checks */
85 static DEFINE_SPINLOCK(lock
);
87 /* If this is the 'overlay' stereo DAI */
88 static inline bool is_secondary(struct i2s_dai
*i2s
)
90 return i2s
->pri_dai
? true : false;
93 /* If operating in SoC-Slave mode */
94 static inline bool is_slave(struct i2s_dai
*i2s
)
96 return (readl(i2s
->addr
+ I2SMOD
) & MOD_SLAVE
) ? true : false;
99 /* If this interface of the controller is transmitting data */
100 static inline bool tx_active(struct i2s_dai
*i2s
)
107 active
= readl(i2s
->addr
+ I2SCON
);
109 if (is_secondary(i2s
))
110 active
&= CON_TXSDMA_ACTIVE
;
112 active
&= CON_TXDMA_ACTIVE
;
114 return active
? true : false;
117 /* If the other interface of the controller is transmitting data */
118 static inline bool other_tx_active(struct i2s_dai
*i2s
)
120 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
122 return tx_active(other
);
125 /* If any interface of the controller is transmitting data */
126 static inline bool any_tx_active(struct i2s_dai
*i2s
)
128 return tx_active(i2s
) || other_tx_active(i2s
);
131 /* If this interface of the controller is receiving data */
132 static inline bool rx_active(struct i2s_dai
*i2s
)
139 active
= readl(i2s
->addr
+ I2SCON
) & CON_RXDMA_ACTIVE
;
141 return active
? true : false;
144 /* If the other interface of the controller is receiving data */
145 static inline bool other_rx_active(struct i2s_dai
*i2s
)
147 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
149 return rx_active(other
);
152 /* If any interface of the controller is receiving data */
153 static inline bool any_rx_active(struct i2s_dai
*i2s
)
155 return rx_active(i2s
) || other_rx_active(i2s
);
158 /* If the other DAI is transmitting or receiving data */
159 static inline bool other_active(struct i2s_dai
*i2s
)
161 return other_rx_active(i2s
) || other_tx_active(i2s
);
164 /* If this DAI is transmitting or receiving data */
165 static inline bool this_active(struct i2s_dai
*i2s
)
167 return tx_active(i2s
) || rx_active(i2s
);
170 /* If the controller is active anyway */
171 static inline bool any_active(struct i2s_dai
*i2s
)
173 return this_active(i2s
) || other_active(i2s
);
176 static inline struct i2s_dai
*to_info(struct snd_soc_dai
*dai
)
178 return snd_soc_dai_get_drvdata(dai
);
181 static inline bool is_opened(struct i2s_dai
*i2s
)
183 if (i2s
&& (i2s
->mode
& DAI_OPENED
))
189 static inline bool is_manager(struct i2s_dai
*i2s
)
191 if (is_opened(i2s
) && (i2s
->mode
& DAI_MANAGER
))
197 /* Read RCLK of I2S (in multiples of LRCLK) */
198 static inline unsigned get_rfs(struct i2s_dai
*i2s
)
202 if (i2s
->quirks
& QUIRK_SUPPORTS_TDM
)
203 rfs
= readl(i2s
->addr
+ I2SMOD
) >> EXYNOS5420_MOD_RCLK_SHIFT
;
205 rfs
= (readl(i2s
->addr
+ I2SMOD
) >> MOD_RCLK_SHIFT
);
206 rfs
&= MOD_RCLK_MASK
;
216 /* Write RCLK of I2S (in multiples of LRCLK) */
217 static inline void set_rfs(struct i2s_dai
*i2s
, unsigned rfs
)
219 u32 mod
= readl(i2s
->addr
+ I2SMOD
);
222 if (i2s
->quirks
& QUIRK_SUPPORTS_TDM
)
223 rfs_shift
= EXYNOS5420_MOD_RCLK_SHIFT
;
225 rfs_shift
= MOD_RCLK_SHIFT
;
226 mod
&= ~(MOD_RCLK_MASK
<< rfs_shift
);
230 mod
|= (MOD_RCLK_768FS
<< rfs_shift
);
233 mod
|= (MOD_RCLK_512FS
<< rfs_shift
);
236 mod
|= (MOD_RCLK_384FS
<< rfs_shift
);
239 mod
|= (MOD_RCLK_256FS
<< rfs_shift
);
243 writel(mod
, i2s
->addr
+ I2SMOD
);
246 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
247 static inline unsigned get_bfs(struct i2s_dai
*i2s
)
251 if (i2s
->quirks
& QUIRK_SUPPORTS_TDM
) {
252 bfs
= readl(i2s
->addr
+ I2SMOD
) >> EXYNOS5420_MOD_BCLK_SHIFT
;
253 bfs
&= EXYNOS5420_MOD_BCLK_MASK
;
255 bfs
= readl(i2s
->addr
+ I2SMOD
) >> MOD_BCLK_SHIFT
;
256 bfs
&= MOD_BCLK_MASK
;
272 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
273 static inline void set_bfs(struct i2s_dai
*i2s
, unsigned bfs
)
275 u32 mod
= readl(i2s
->addr
+ I2SMOD
);
277 int tdm
= i2s
->quirks
& QUIRK_SUPPORTS_TDM
;
279 if (i2s
->quirks
& QUIRK_SUPPORTS_TDM
) {
280 bfs_shift
= EXYNOS5420_MOD_BCLK_SHIFT
;
281 mod
&= ~(EXYNOS5420_MOD_BCLK_MASK
<< bfs_shift
);
283 bfs_shift
= MOD_BCLK_SHIFT
;
284 mod
&= ~(MOD_BCLK_MASK
<< bfs_shift
);
287 /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
288 if (!tdm
&& bfs
> 48) {
289 dev_err(&i2s
->pdev
->dev
, "Unsupported BCLK divider\n");
295 mod
|= (MOD_BCLK_48FS
<< bfs_shift
);
298 mod
|= (MOD_BCLK_32FS
<< bfs_shift
);
301 mod
|= (MOD_BCLK_24FS
<< bfs_shift
);
304 mod
|= (MOD_BCLK_16FS
<< bfs_shift
);
307 mod
|= (EXYNOS5420_MOD_BCLK_64FS
<< bfs_shift
);
310 mod
|= (EXYNOS5420_MOD_BCLK_96FS
<< bfs_shift
);
313 mod
|= (EXYNOS5420_MOD_BCLK_128FS
<< bfs_shift
);
316 mod
|= (EXYNOS5420_MOD_BCLK_192FS
<< bfs_shift
);
319 mod
|= (EXYNOS5420_MOD_BCLK_256FS
<< bfs_shift
);
322 dev_err(&i2s
->pdev
->dev
, "Wrong BCLK Divider!\n");
326 writel(mod
, i2s
->addr
+ I2SMOD
);
330 static inline int get_blc(struct i2s_dai
*i2s
)
332 int blc
= readl(i2s
->addr
+ I2SMOD
);
334 blc
= (blc
>> 13) & 0x3;
343 /* TX Channel Control */
344 static void i2s_txctrl(struct i2s_dai
*i2s
, int on
)
346 void __iomem
*addr
= i2s
->addr
;
347 u32 con
= readl(addr
+ I2SCON
);
348 u32 mod
= readl(addr
+ I2SMOD
) & ~MOD_MASK
;
352 con
&= ~CON_TXCH_PAUSE
;
354 if (is_secondary(i2s
)) {
355 con
|= CON_TXSDMA_ACTIVE
;
356 con
&= ~CON_TXSDMA_PAUSE
;
358 con
|= CON_TXDMA_ACTIVE
;
359 con
&= ~CON_TXDMA_PAUSE
;
362 if (any_rx_active(i2s
))
367 if (is_secondary(i2s
)) {
368 con
|= CON_TXSDMA_PAUSE
;
369 con
&= ~CON_TXSDMA_ACTIVE
;
371 con
|= CON_TXDMA_PAUSE
;
372 con
&= ~CON_TXDMA_ACTIVE
;
375 if (other_tx_active(i2s
)) {
376 writel(con
, addr
+ I2SCON
);
380 con
|= CON_TXCH_PAUSE
;
382 if (any_rx_active(i2s
))
388 writel(mod
, addr
+ I2SMOD
);
389 writel(con
, addr
+ I2SCON
);
392 /* RX Channel Control */
393 static void i2s_rxctrl(struct i2s_dai
*i2s
, int on
)
395 void __iomem
*addr
= i2s
->addr
;
396 u32 con
= readl(addr
+ I2SCON
);
397 u32 mod
= readl(addr
+ I2SMOD
) & ~MOD_MASK
;
400 con
|= CON_RXDMA_ACTIVE
| CON_ACTIVE
;
401 con
&= ~(CON_RXDMA_PAUSE
| CON_RXCH_PAUSE
);
403 if (any_tx_active(i2s
))
408 con
|= CON_RXDMA_PAUSE
| CON_RXCH_PAUSE
;
409 con
&= ~CON_RXDMA_ACTIVE
;
411 if (any_tx_active(i2s
))
417 writel(mod
, addr
+ I2SMOD
);
418 writel(con
, addr
+ I2SCON
);
421 /* Flush FIFO of an interface */
422 static inline void i2s_fifo(struct i2s_dai
*i2s
, u32 flush
)
430 if (is_secondary(i2s
))
431 fic
= i2s
->addr
+ I2SFICS
;
433 fic
= i2s
->addr
+ I2SFIC
;
436 writel(readl(fic
) | flush
, fic
);
439 val
= msecs_to_loops(1) / 1000; /* 1 usec */
443 writel(readl(fic
) & ~flush
, fic
);
446 static int i2s_set_sysclk(struct snd_soc_dai
*dai
,
447 int clk_id
, unsigned int rfs
, int dir
)
449 struct i2s_dai
*i2s
= to_info(dai
);
450 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
451 u32 mod
= readl(i2s
->addr
+ I2SMOD
);
454 case SAMSUNG_I2S_OPCLK
:
455 mod
&= ~MOD_OPCLK_MASK
;
458 case SAMSUNG_I2S_CDCLK
:
459 /* Shouldn't matter in GATING(CLOCK_IN) mode */
460 if (dir
== SND_SOC_CLOCK_IN
)
463 if ((rfs
&& other
->rfs
&& (other
->rfs
!= rfs
)) ||
465 (((dir
== SND_SOC_CLOCK_IN
)
466 && !(mod
& MOD_CDCLKCON
)) ||
467 ((dir
== SND_SOC_CLOCK_OUT
)
468 && (mod
& MOD_CDCLKCON
))))) {
469 dev_err(&i2s
->pdev
->dev
,
470 "%s:%d Other DAI busy\n", __func__
, __LINE__
);
474 if (dir
== SND_SOC_CLOCK_IN
)
477 mod
&= ~MOD_CDCLKCON
;
482 case SAMSUNG_I2S_RCLKSRC_0
: /* clock corrsponding to IISMOD[10] := 0 */
483 case SAMSUNG_I2S_RCLKSRC_1
: /* clock corrsponding to IISMOD[10] := 1 */
484 if ((i2s
->quirks
& QUIRK_NO_MUXPSR
)
485 || (clk_id
== SAMSUNG_I2S_RCLKSRC_0
))
490 if (!any_active(i2s
)) {
492 if ((clk_id
&& !(mod
& MOD_IMS_SYSMUX
)) ||
493 (!clk_id
&& (mod
& MOD_IMS_SYSMUX
))) {
494 clk_disable_unprepare(i2s
->op_clk
);
495 clk_put(i2s
->op_clk
);
498 clk_get_rate(i2s
->op_clk
);
504 i2s
->op_clk
= clk_get(&i2s
->pdev
->dev
,
507 i2s
->op_clk
= clk_get(&i2s
->pdev
->dev
,
509 clk_prepare_enable(i2s
->op_clk
);
510 i2s
->rclk_srcrate
= clk_get_rate(i2s
->op_clk
);
512 /* Over-ride the other's */
514 other
->op_clk
= i2s
->op_clk
;
515 other
->rclk_srcrate
= i2s
->rclk_srcrate
;
517 } else if ((!clk_id
&& (mod
& MOD_IMS_SYSMUX
))
518 || (clk_id
&& !(mod
& MOD_IMS_SYSMUX
))) {
519 dev_err(&i2s
->pdev
->dev
,
520 "%s:%d Other DAI busy\n", __func__
, __LINE__
);
523 /* Call can't be on the active DAI */
524 i2s
->op_clk
= other
->op_clk
;
525 i2s
->rclk_srcrate
= other
->rclk_srcrate
;
530 mod
&= ~MOD_IMS_SYSMUX
;
532 mod
|= MOD_IMS_SYSMUX
;
536 dev_err(&i2s
->pdev
->dev
, "We don't serve that!\n");
540 writel(mod
, i2s
->addr
+ I2SMOD
);
545 static int i2s_set_fmt(struct snd_soc_dai
*dai
,
548 struct i2s_dai
*i2s
= to_info(dai
);
549 u32 mod
= readl(i2s
->addr
+ I2SMOD
);
550 int lrp_shift
, sdf_shift
, sdf_mask
, lrp_rlow
;
553 if (i2s
->quirks
& QUIRK_SUPPORTS_TDM
) {
554 lrp_shift
= EXYNOS5420_MOD_LRP_SHIFT
;
555 sdf_shift
= EXYNOS5420_MOD_SDF_SHIFT
;
557 lrp_shift
= MOD_LRP_SHIFT
;
558 sdf_shift
= MOD_SDF_SHIFT
;
561 sdf_mask
= MOD_SDF_MASK
<< sdf_shift
;
562 lrp_rlow
= MOD_LR_RLOW
<< lrp_shift
;
564 /* Format is priority */
565 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
566 case SND_SOC_DAIFMT_RIGHT_J
:
568 tmp
|= (MOD_SDF_MSB
<< sdf_shift
);
570 case SND_SOC_DAIFMT_LEFT_J
:
572 tmp
|= (MOD_SDF_LSB
<< sdf_shift
);
574 case SND_SOC_DAIFMT_I2S
:
575 tmp
|= (MOD_SDF_IIS
<< sdf_shift
);
578 dev_err(&i2s
->pdev
->dev
, "Format not supported\n");
583 * INV flag is relative to the FORMAT flag - if set it simply
584 * flips the polarity specified by the Standard
586 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
587 case SND_SOC_DAIFMT_NB_NF
:
589 case SND_SOC_DAIFMT_NB_IF
:
596 dev_err(&i2s
->pdev
->dev
, "Polarity not supported\n");
600 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
601 case SND_SOC_DAIFMT_CBM_CFM
:
604 case SND_SOC_DAIFMT_CBS_CFS
:
605 /* Set default source clock in Master mode */
606 if (i2s
->rclk_srcrate
== 0)
607 i2s_set_sysclk(dai
, SAMSUNG_I2S_RCLKSRC_0
,
608 0, SND_SOC_CLOCK_IN
);
611 dev_err(&i2s
->pdev
->dev
, "master/slave format not supported\n");
616 * Don't change the I2S mode if any controller is active on this
619 if (any_active(i2s
) &&
620 ((mod
& (sdf_mask
| lrp_rlow
| MOD_SLAVE
)) != tmp
)) {
621 dev_err(&i2s
->pdev
->dev
,
622 "%s:%d Other DAI busy\n", __func__
, __LINE__
);
626 mod
&= ~(sdf_mask
| lrp_rlow
| MOD_SLAVE
);
628 writel(mod
, i2s
->addr
+ I2SMOD
);
633 static int i2s_hw_params(struct snd_pcm_substream
*substream
,
634 struct snd_pcm_hw_params
*params
, struct snd_soc_dai
*dai
)
636 struct i2s_dai
*i2s
= to_info(dai
);
637 u32 mod
= readl(i2s
->addr
+ I2SMOD
);
639 if (!is_secondary(i2s
))
640 mod
&= ~(MOD_DC2_EN
| MOD_DC1_EN
);
642 switch (params_channels(params
)) {
649 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
650 i2s
->dma_playback
.dma_size
= 4;
652 i2s
->dma_capture
.dma_size
= 4;
655 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
656 i2s
->dma_playback
.dma_size
= 2;
658 i2s
->dma_capture
.dma_size
= 2;
662 dev_err(&i2s
->pdev
->dev
, "%d channels not supported\n",
663 params_channels(params
));
667 if (is_secondary(i2s
))
668 mod
&= ~MOD_BLCS_MASK
;
670 mod
&= ~MOD_BLCP_MASK
;
673 mod
&= ~MOD_BLC_MASK
;
675 switch (params_format(params
)) {
676 case SNDRV_PCM_FORMAT_S8
:
677 if (is_secondary(i2s
))
678 mod
|= MOD_BLCS_8BIT
;
680 mod
|= MOD_BLCP_8BIT
;
684 case SNDRV_PCM_FORMAT_S16_LE
:
685 if (is_secondary(i2s
))
686 mod
|= MOD_BLCS_16BIT
;
688 mod
|= MOD_BLCP_16BIT
;
690 mod
|= MOD_BLC_16BIT
;
692 case SNDRV_PCM_FORMAT_S24_LE
:
693 if (is_secondary(i2s
))
694 mod
|= MOD_BLCS_24BIT
;
696 mod
|= MOD_BLCP_24BIT
;
698 mod
|= MOD_BLC_24BIT
;
701 dev_err(&i2s
->pdev
->dev
, "Format(%d) not supported\n",
702 params_format(params
));
705 writel(mod
, i2s
->addr
+ I2SMOD
);
707 samsung_asoc_init_dma_data(dai
, &i2s
->dma_playback
, &i2s
->dma_capture
);
709 i2s
->frmclk
= params_rate(params
);
714 /* We set constraints on the substream acc to the version of I2S */
715 static int i2s_startup(struct snd_pcm_substream
*substream
,
716 struct snd_soc_dai
*dai
)
718 struct i2s_dai
*i2s
= to_info(dai
);
719 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
722 spin_lock_irqsave(&lock
, flags
);
724 i2s
->mode
|= DAI_OPENED
;
726 if (is_manager(other
))
727 i2s
->mode
&= ~DAI_MANAGER
;
729 i2s
->mode
|= DAI_MANAGER
;
731 if (!any_active(i2s
) && (i2s
->quirks
& QUIRK_NEED_RSTCLR
))
732 writel(CON_RSTCLR
, i2s
->addr
+ I2SCON
);
734 spin_unlock_irqrestore(&lock
, flags
);
739 static void i2s_shutdown(struct snd_pcm_substream
*substream
,
740 struct snd_soc_dai
*dai
)
742 struct i2s_dai
*i2s
= to_info(dai
);
743 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
746 spin_lock_irqsave(&lock
, flags
);
748 i2s
->mode
&= ~DAI_OPENED
;
749 i2s
->mode
&= ~DAI_MANAGER
;
751 if (is_opened(other
))
752 other
->mode
|= DAI_MANAGER
;
754 /* Reset any constraint on RFS and BFS */
758 spin_unlock_irqrestore(&lock
, flags
);
760 /* Gate CDCLK by default */
761 if (!is_opened(other
))
762 i2s_set_sysclk(dai
, SAMSUNG_I2S_CDCLK
,
763 0, SND_SOC_CLOCK_IN
);
766 static int config_setup(struct i2s_dai
*i2s
)
768 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
769 unsigned rfs
, bfs
, blc
;
779 /* Select least possible multiple(2) if no constraint set */
788 if ((rfs
== 256 || rfs
== 512) && (blc
== 24)) {
789 dev_err(&i2s
->pdev
->dev
,
790 "%d-RFS not supported for 24-blc\n", rfs
);
795 if (bfs
== 16 || bfs
== 32)
801 /* If already setup and running */
802 if (any_active(i2s
) && (get_rfs(i2s
) != rfs
|| get_bfs(i2s
) != bfs
)) {
803 dev_err(&i2s
->pdev
->dev
,
804 "%s:%d Other DAI busy\n", __func__
, __LINE__
);
811 /* Don't bother with PSR in Slave mode */
815 if (!(i2s
->quirks
& QUIRK_NO_MUXPSR
)) {
816 psr
= i2s
->rclk_srcrate
/ i2s
->frmclk
/ rfs
;
817 writel(((psr
- 1) << 8) | PSR_PSREN
, i2s
->addr
+ I2SPSR
);
818 dev_dbg(&i2s
->pdev
->dev
,
819 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
820 i2s
->rclk_srcrate
, psr
, rfs
, bfs
);
826 static int i2s_trigger(struct snd_pcm_substream
*substream
,
827 int cmd
, struct snd_soc_dai
*dai
)
829 int capture
= (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
);
830 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
831 struct i2s_dai
*i2s
= to_info(rtd
->cpu_dai
);
835 case SNDRV_PCM_TRIGGER_START
:
836 case SNDRV_PCM_TRIGGER_RESUME
:
837 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
838 local_irq_save(flags
);
840 if (config_setup(i2s
)) {
841 local_irq_restore(flags
);
850 local_irq_restore(flags
);
852 case SNDRV_PCM_TRIGGER_STOP
:
853 case SNDRV_PCM_TRIGGER_SUSPEND
:
854 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
855 local_irq_save(flags
);
859 i2s_fifo(i2s
, FIC_RXFLUSH
);
862 i2s_fifo(i2s
, FIC_TXFLUSH
);
865 local_irq_restore(flags
);
872 static int i2s_set_clkdiv(struct snd_soc_dai
*dai
,
875 struct i2s_dai
*i2s
= to_info(dai
);
876 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
879 case SAMSUNG_I2S_DIV_BCLK
:
880 if ((any_active(i2s
) && div
&& (get_bfs(i2s
) != div
))
881 || (other
&& other
->bfs
&& (other
->bfs
!= div
))) {
882 dev_err(&i2s
->pdev
->dev
,
883 "%s:%d Other DAI busy\n", __func__
, __LINE__
);
889 dev_err(&i2s
->pdev
->dev
,
890 "Invalid clock divider(%d)\n", div_id
);
897 static snd_pcm_sframes_t
898 i2s_delay(struct snd_pcm_substream
*substream
, struct snd_soc_dai
*dai
)
900 struct i2s_dai
*i2s
= to_info(dai
);
901 u32 reg
= readl(i2s
->addr
+ I2SFIC
);
902 snd_pcm_sframes_t delay
;
904 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
905 delay
= FIC_RXCOUNT(reg
);
906 else if (is_secondary(i2s
))
907 delay
= FICS_TXCOUNT(readl(i2s
->addr
+ I2SFICS
));
909 delay
= FIC_TXCOUNT(reg
);
915 static int i2s_suspend(struct snd_soc_dai
*dai
)
917 struct i2s_dai
*i2s
= to_info(dai
);
920 i2s
->suspend_i2smod
= readl(i2s
->addr
+ I2SMOD
);
921 i2s
->suspend_i2scon
= readl(i2s
->addr
+ I2SCON
);
922 i2s
->suspend_i2spsr
= readl(i2s
->addr
+ I2SPSR
);
928 static int i2s_resume(struct snd_soc_dai
*dai
)
930 struct i2s_dai
*i2s
= to_info(dai
);
933 writel(i2s
->suspend_i2scon
, i2s
->addr
+ I2SCON
);
934 writel(i2s
->suspend_i2smod
, i2s
->addr
+ I2SMOD
);
935 writel(i2s
->suspend_i2spsr
, i2s
->addr
+ I2SPSR
);
941 #define i2s_suspend NULL
942 #define i2s_resume NULL
945 static int samsung_i2s_dai_probe(struct snd_soc_dai
*dai
)
947 struct i2s_dai
*i2s
= to_info(dai
);
948 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
950 if (other
&& other
->clk
) { /* If this is probe on secondary */
951 samsung_asoc_init_dma_data(dai
, &other
->sec_dai
->dma_playback
,
956 i2s
->addr
= ioremap(i2s
->base
, 0x100);
957 if (i2s
->addr
== NULL
) {
958 dev_err(&i2s
->pdev
->dev
, "cannot ioremap registers\n");
962 i2s
->clk
= clk_get(&i2s
->pdev
->dev
, "iis");
963 if (IS_ERR(i2s
->clk
)) {
964 dev_err(&i2s
->pdev
->dev
, "failed to get i2s_clock\n");
968 clk_prepare_enable(i2s
->clk
);
970 samsung_asoc_init_dma_data(dai
, &i2s
->dma_playback
, &i2s
->dma_capture
);
973 other
->addr
= i2s
->addr
;
974 other
->clk
= i2s
->clk
;
977 if (i2s
->quirks
& QUIRK_NEED_RSTCLR
)
978 writel(CON_RSTCLR
, i2s
->addr
+ I2SCON
);
980 if (i2s
->quirks
& QUIRK_SEC_DAI
)
981 idma_reg_addr_init(i2s
->addr
,
982 i2s
->sec_dai
->idma_playback
.dma_addr
);
985 /* Reset any constraint on RFS and BFS */
988 i2s
->rclk_srcrate
= 0;
991 i2s_fifo(i2s
, FIC_TXFLUSH
);
992 i2s_fifo(other
, FIC_TXFLUSH
);
993 i2s_fifo(i2s
, FIC_RXFLUSH
);
995 /* Gate CDCLK by default */
996 if (!is_opened(other
))
997 i2s_set_sysclk(dai
, SAMSUNG_I2S_CDCLK
,
998 0, SND_SOC_CLOCK_IN
);
1003 static int samsung_i2s_dai_remove(struct snd_soc_dai
*dai
)
1005 struct i2s_dai
*i2s
= snd_soc_dai_get_drvdata(dai
);
1006 struct i2s_dai
*other
= i2s
->pri_dai
? : i2s
->sec_dai
;
1008 if (!other
|| !other
->clk
) {
1010 if (i2s
->quirks
& QUIRK_NEED_RSTCLR
)
1011 writel(0, i2s
->addr
+ I2SCON
);
1013 clk_disable_unprepare(i2s
->clk
);
1024 static const struct snd_soc_dai_ops samsung_i2s_dai_ops
= {
1025 .trigger
= i2s_trigger
,
1026 .hw_params
= i2s_hw_params
,
1027 .set_fmt
= i2s_set_fmt
,
1028 .set_clkdiv
= i2s_set_clkdiv
,
1029 .set_sysclk
= i2s_set_sysclk
,
1030 .startup
= i2s_startup
,
1031 .shutdown
= i2s_shutdown
,
1035 static const struct snd_soc_component_driver samsung_i2s_component
= {
1036 .name
= "samsung-i2s",
1039 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
1041 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1042 SNDRV_PCM_FMTBIT_S16_LE | \
1043 SNDRV_PCM_FMTBIT_S24_LE)
1045 static struct i2s_dai
*i2s_alloc_dai(struct platform_device
*pdev
, bool sec
)
1047 struct i2s_dai
*i2s
;
1050 i2s
= devm_kzalloc(&pdev
->dev
, sizeof(struct i2s_dai
), GFP_KERNEL
);
1055 i2s
->pri_dai
= NULL
;
1056 i2s
->sec_dai
= NULL
;
1057 i2s
->i2s_dai_drv
.symmetric_rates
= 1;
1058 i2s
->i2s_dai_drv
.probe
= samsung_i2s_dai_probe
;
1059 i2s
->i2s_dai_drv
.remove
= samsung_i2s_dai_remove
;
1060 i2s
->i2s_dai_drv
.ops
= &samsung_i2s_dai_ops
;
1061 i2s
->i2s_dai_drv
.suspend
= i2s_suspend
;
1062 i2s
->i2s_dai_drv
.resume
= i2s_resume
;
1063 i2s
->i2s_dai_drv
.playback
.channels_min
= 1;
1064 i2s
->i2s_dai_drv
.playback
.channels_max
= 2;
1065 i2s
->i2s_dai_drv
.playback
.rates
= SAMSUNG_I2S_RATES
;
1066 i2s
->i2s_dai_drv
.playback
.formats
= SAMSUNG_I2S_FMTS
;
1069 i2s
->i2s_dai_drv
.capture
.channels_min
= 1;
1070 i2s
->i2s_dai_drv
.capture
.channels_max
= 2;
1071 i2s
->i2s_dai_drv
.capture
.rates
= SAMSUNG_I2S_RATES
;
1072 i2s
->i2s_dai_drv
.capture
.formats
= SAMSUNG_I2S_FMTS
;
1073 dev_set_drvdata(&i2s
->pdev
->dev
, i2s
);
1074 } else { /* Create a new platform_device for Secondary */
1075 i2s
->pdev
= platform_device_alloc("samsung-i2s-sec", -1);
1079 i2s
->pdev
->dev
.parent
= &pdev
->dev
;
1081 platform_set_drvdata(i2s
->pdev
, i2s
);
1082 ret
= platform_device_add(i2s
->pdev
);
1090 static const struct of_device_id exynos_i2s_match
[];
1092 static inline const struct samsung_i2s_dai_data
*samsung_i2s_get_driver_data(
1093 struct platform_device
*pdev
)
1096 if (pdev
->dev
.of_node
) {
1097 const struct of_device_id
*match
;
1098 match
= of_match_node(exynos_i2s_match
, pdev
->dev
.of_node
);
1102 return (struct samsung_i2s_dai_data
*)
1103 platform_get_device_id(pdev
)->driver_data
;
1106 #ifdef CONFIG_PM_RUNTIME
1107 static int i2s_runtime_suspend(struct device
*dev
)
1109 struct i2s_dai
*i2s
= dev_get_drvdata(dev
);
1111 clk_disable_unprepare(i2s
->clk
);
1116 static int i2s_runtime_resume(struct device
*dev
)
1118 struct i2s_dai
*i2s
= dev_get_drvdata(dev
);
1120 clk_prepare_enable(i2s
->clk
);
1124 #endif /* CONFIG_PM_RUNTIME */
1126 static int samsung_i2s_probe(struct platform_device
*pdev
)
1128 struct i2s_dai
*pri_dai
, *sec_dai
= NULL
;
1129 struct s3c_audio_pdata
*i2s_pdata
= pdev
->dev
.platform_data
;
1130 struct samsung_i2s
*i2s_cfg
= NULL
;
1131 struct resource
*res
;
1132 u32 regs_base
, quirks
= 0, idma_addr
= 0;
1133 struct device_node
*np
= pdev
->dev
.of_node
;
1134 const struct samsung_i2s_dai_data
*i2s_dai_data
;
1137 /* Call during Seconday interface registration */
1138 i2s_dai_data
= samsung_i2s_get_driver_data(pdev
);
1140 if (i2s_dai_data
->dai_type
== TYPE_SEC
) {
1141 sec_dai
= dev_get_drvdata(&pdev
->dev
);
1143 dev_err(&pdev
->dev
, "Unable to get drvdata\n");
1146 devm_snd_soc_register_component(&sec_dai
->pdev
->dev
,
1147 &samsung_i2s_component
,
1148 &sec_dai
->i2s_dai_drv
, 1);
1149 samsung_asoc_dma_platform_register(&pdev
->dev
);
1153 pri_dai
= i2s_alloc_dai(pdev
, false);
1155 dev_err(&pdev
->dev
, "Unable to alloc I2S_pri\n");
1160 res
= platform_get_resource(pdev
, IORESOURCE_DMA
, 0);
1163 "Unable to get I2S-TX dma resource\n");
1166 pri_dai
->dma_playback
.channel
= res
->start
;
1168 res
= platform_get_resource(pdev
, IORESOURCE_DMA
, 1);
1171 "Unable to get I2S-RX dma resource\n");
1174 pri_dai
->dma_capture
.channel
= res
->start
;
1176 if (i2s_pdata
== NULL
) {
1177 dev_err(&pdev
->dev
, "Can't work without s3c_audio_pdata\n");
1181 if (&i2s_pdata
->type
)
1182 i2s_cfg
= &i2s_pdata
->type
.i2s
;
1185 quirks
= i2s_cfg
->quirks
;
1186 idma_addr
= i2s_cfg
->idma_addr
;
1189 quirks
= i2s_dai_data
->quirks
;
1190 if (of_property_read_u32(np
, "samsung,idma-addr",
1192 if (quirks
& QUIRK_SEC_DAI
) {
1193 dev_err(&pdev
->dev
, "idma address is not"\
1200 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1202 dev_err(&pdev
->dev
, "Unable to get I2S SFR address\n");
1206 if (!request_mem_region(res
->start
, resource_size(res
),
1208 dev_err(&pdev
->dev
, "Unable to request SFR region\n");
1211 regs_base
= res
->start
;
1213 pri_dai
->dma_playback
.dma_addr
= regs_base
+ I2STXD
;
1214 pri_dai
->dma_capture
.dma_addr
= regs_base
+ I2SRXD
;
1215 pri_dai
->dma_playback
.client
=
1216 (struct s3c_dma_client
*)&pri_dai
->dma_playback
;
1217 pri_dai
->dma_playback
.ch_name
= "tx";
1218 pri_dai
->dma_capture
.client
=
1219 (struct s3c_dma_client
*)&pri_dai
->dma_capture
;
1220 pri_dai
->dma_capture
.ch_name
= "rx";
1221 pri_dai
->dma_playback
.dma_size
= 4;
1222 pri_dai
->dma_capture
.dma_size
= 4;
1223 pri_dai
->base
= regs_base
;
1224 pri_dai
->quirks
= quirks
;
1226 if (quirks
& QUIRK_PRI_6CHAN
)
1227 pri_dai
->i2s_dai_drv
.playback
.channels_max
= 6;
1229 if (quirks
& QUIRK_SEC_DAI
) {
1230 sec_dai
= i2s_alloc_dai(pdev
, true);
1232 dev_err(&pdev
->dev
, "Unable to alloc I2S_sec\n");
1236 sec_dai
->dma_playback
.dma_addr
= regs_base
+ I2STXDS
;
1237 sec_dai
->dma_playback
.client
=
1238 (struct s3c_dma_client
*)&sec_dai
->dma_playback
;
1239 sec_dai
->dma_playback
.ch_name
= "tx-sec";
1242 res
= platform_get_resource(pdev
, IORESOURCE_DMA
, 2);
1244 sec_dai
->dma_playback
.channel
= res
->start
;
1247 sec_dai
->dma_playback
.dma_size
= 4;
1248 sec_dai
->base
= regs_base
;
1249 sec_dai
->quirks
= quirks
;
1250 sec_dai
->idma_playback
.dma_addr
= idma_addr
;
1251 sec_dai
->pri_dai
= pri_dai
;
1252 pri_dai
->sec_dai
= sec_dai
;
1255 if (i2s_pdata
&& i2s_pdata
->cfg_gpio
&& i2s_pdata
->cfg_gpio(pdev
)) {
1256 dev_err(&pdev
->dev
, "Unable to configure gpio\n");
1261 devm_snd_soc_register_component(&pri_dai
->pdev
->dev
,
1262 &samsung_i2s_component
,
1263 &pri_dai
->i2s_dai_drv
, 1);
1265 pm_runtime_enable(&pdev
->dev
);
1267 samsung_asoc_dma_platform_register(&pdev
->dev
);
1272 release_mem_region(regs_base
, resource_size(res
));
1277 static int samsung_i2s_remove(struct platform_device
*pdev
)
1279 struct i2s_dai
*i2s
, *other
;
1280 struct resource
*res
;
1282 i2s
= dev_get_drvdata(&pdev
->dev
);
1283 other
= i2s
->pri_dai
? : i2s
->sec_dai
;
1286 other
->pri_dai
= NULL
;
1287 other
->sec_dai
= NULL
;
1289 pm_runtime_disable(&pdev
->dev
);
1290 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1292 release_mem_region(res
->start
, resource_size(res
));
1295 i2s
->pri_dai
= NULL
;
1296 i2s
->sec_dai
= NULL
;
1298 samsung_asoc_dma_platform_unregister(&pdev
->dev
);
1303 static const struct samsung_i2s_dai_data i2sv3_dai_type
= {
1304 .dai_type
= TYPE_PRI
,
1305 .quirks
= QUIRK_NO_MUXPSR
,
1308 static const struct samsung_i2s_dai_data i2sv5_dai_type
= {
1309 .dai_type
= TYPE_PRI
,
1310 .quirks
= QUIRK_PRI_6CHAN
| QUIRK_SEC_DAI
| QUIRK_NEED_RSTCLR
,
1313 static const struct samsung_i2s_dai_data i2sv6_dai_type
= {
1314 .dai_type
= TYPE_PRI
,
1315 .quirks
= QUIRK_PRI_6CHAN
| QUIRK_SEC_DAI
| QUIRK_NEED_RSTCLR
|
1319 static const struct samsung_i2s_dai_data samsung_dai_type_pri
= {
1320 .dai_type
= TYPE_PRI
,
1323 static const struct samsung_i2s_dai_data samsung_dai_type_sec
= {
1324 .dai_type
= TYPE_SEC
,
1327 static struct platform_device_id samsung_i2s_driver_ids
[] = {
1329 .name
= "samsung-i2s",
1330 .driver_data
= (kernel_ulong_t
)&samsung_dai_type_pri
,
1332 .name
= "samsung-i2s-sec",
1333 .driver_data
= (kernel_ulong_t
)&samsung_dai_type_sec
,
1337 MODULE_DEVICE_TABLE(platform
, samsung_i2s_driver_ids
);
1340 static const struct of_device_id exynos_i2s_match
[] = {
1342 .compatible
= "samsung,s3c6410-i2s",
1343 .data
= &i2sv3_dai_type
,
1345 .compatible
= "samsung,s5pv210-i2s",
1346 .data
= &i2sv5_dai_type
,
1348 .compatible
= "samsung,exynos5420-i2s",
1349 .data
= &i2sv6_dai_type
,
1353 MODULE_DEVICE_TABLE(of
, exynos_i2s_match
);
1356 static const struct dev_pm_ops samsung_i2s_pm
= {
1357 SET_RUNTIME_PM_OPS(i2s_runtime_suspend
,
1358 i2s_runtime_resume
, NULL
)
1361 static struct platform_driver samsung_i2s_driver
= {
1362 .probe
= samsung_i2s_probe
,
1363 .remove
= samsung_i2s_remove
,
1364 .id_table
= samsung_i2s_driver_ids
,
1366 .name
= "samsung-i2s",
1367 .owner
= THIS_MODULE
,
1368 .of_match_table
= of_match_ptr(exynos_i2s_match
),
1369 .pm
= &samsung_i2s_pm
,
1373 module_platform_driver(samsung_i2s_driver
);
1375 /* Module information */
1376 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1377 MODULE_DESCRIPTION("Samsung I2S Interface");
1378 MODULE_ALIAS("platform:samsung-i2s");
1379 MODULE_LICENSE("GPL");