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 <dt-bindings/sound/samsung-i2s.h>
14 #include <linux/delay.h>
15 #include <linux/slab.h>
16 #include <linux/clk.h>
17 #include <linux/clk-provider.h>
19 #include <linux/module.h>
21 #include <linux/of_device.h>
22 #include <linux/of_gpio.h>
23 #include <linux/pm_runtime.h>
25 #include <sound/soc.h>
26 #include <sound/pcm_params.h>
28 #include <linux/platform_data/asoc-s3c.h>
35 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
37 #define SAMSUNG_I2S_ID_PRIMARY 1
38 #define SAMSUNG_I2S_ID_SECONDARY 2
40 struct samsung_i2s_variant_regs {
45 unsigned int rclksrc_off;
47 unsigned int cdclkcon_off;
49 unsigned int bfs_mask;
50 unsigned int rfs_mask;
51 unsigned int ftx0cnt_off;
54 struct samsung_i2s_dai_data {
56 unsigned int pcm_rates;
57 const struct samsung_i2s_variant_regs *i2s_variant_regs;
61 /* Platform device for this DAI */
62 struct platform_device *pdev;
63 /* Memory mapped SFR region */
65 /* Rate of RCLK source clock */
66 unsigned long rclk_srcrate;
70 * Specifically requested RCLK,BCLK by MACHINE Driver.
71 * 0 indicates CPU driver is free to choose any value.
74 /* I2S Controller's core clock */
76 /* Clock for generating I2S signals */
78 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
79 struct i2s_dai *pri_dai;
80 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
81 struct i2s_dai *sec_dai;
82 #define DAI_OPENED (1 << 0) /* Dai is opened */
83 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
86 /* Driver for this DAI */
87 struct snd_soc_dai_driver *drv;
90 struct snd_dmaengine_dai_dma_data dma_playback;
91 struct snd_dmaengine_dai_dma_data dma_capture;
92 struct snd_dmaengine_dai_dma_data idma_playback;
98 const struct samsung_i2s_variant_regs *variant_regs;
102 struct samsung_i2s_priv *priv;
105 /* Lock for cross i/f checks */
106 static DEFINE_SPINLOCK(lock);
108 struct samsung_i2s_priv {
109 struct platform_device *pdev;
110 struct platform_device *pdev_sec;
112 /* Spinlock protecting access to the device's registers */
115 /* CPU DAIs and their corresponding drivers */
117 struct snd_soc_dai_driver *dai_drv;
120 /* The clock provider's data */
121 struct clk *clk_table[3];
122 struct clk_onecell_data clk_data;
125 struct i2s_dai *samsung_i2s_get_pri_dai(struct device *dev)
127 struct samsung_i2s_priv *priv = dev_get_drvdata(dev);
129 return &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
132 /* Returns true if this is the 'overlay' stereo DAI */
133 static inline bool is_secondary(struct i2s_dai *i2s)
135 return i2s->drv->id == SAMSUNG_I2S_ID_SECONDARY;
138 /* If operating in SoC-Slave mode */
139 static inline bool is_slave(struct i2s_dai *i2s)
141 u32 mod = readl(i2s->addr + I2SMOD);
142 return (mod & (1 << i2s->variant_regs->mss_off)) ? true : false;
145 /* If this interface of the controller is transmitting data */
146 static inline bool tx_active(struct i2s_dai *i2s)
153 active = readl(i2s->addr + I2SCON);
155 if (is_secondary(i2s))
156 active &= CON_TXSDMA_ACTIVE;
158 active &= CON_TXDMA_ACTIVE;
160 return active ? true : false;
163 /* Return pointer to the other DAI */
164 static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s)
166 return i2s->pri_dai ? : i2s->sec_dai;
169 /* If the other interface of the controller is transmitting data */
170 static inline bool other_tx_active(struct i2s_dai *i2s)
172 struct i2s_dai *other = get_other_dai(i2s);
174 return tx_active(other);
177 /* If any interface of the controller is transmitting data */
178 static inline bool any_tx_active(struct i2s_dai *i2s)
180 return tx_active(i2s) || other_tx_active(i2s);
183 /* If this interface of the controller is receiving data */
184 static inline bool rx_active(struct i2s_dai *i2s)
191 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
193 return active ? true : false;
196 /* If the other interface of the controller is receiving data */
197 static inline bool other_rx_active(struct i2s_dai *i2s)
199 struct i2s_dai *other = get_other_dai(i2s);
201 return rx_active(other);
204 /* If any interface of the controller is receiving data */
205 static inline bool any_rx_active(struct i2s_dai *i2s)
207 return rx_active(i2s) || other_rx_active(i2s);
210 /* If the other DAI is transmitting or receiving data */
211 static inline bool other_active(struct i2s_dai *i2s)
213 return other_rx_active(i2s) || other_tx_active(i2s);
216 /* If this DAI is transmitting or receiving data */
217 static inline bool this_active(struct i2s_dai *i2s)
219 return tx_active(i2s) || rx_active(i2s);
222 /* If the controller is active anyway */
223 static inline bool any_active(struct i2s_dai *i2s)
225 return this_active(i2s) || other_active(i2s);
228 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
230 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
232 return &priv->dai[dai->id - 1];
235 static inline bool is_opened(struct i2s_dai *i2s)
237 if (i2s && (i2s->mode & DAI_OPENED))
243 static inline bool is_manager(struct i2s_dai *i2s)
245 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
251 /* Read RCLK of I2S (in multiples of LRCLK) */
252 static inline unsigned get_rfs(struct i2s_dai *i2s)
255 rfs = readl(i2s->addr + I2SMOD) >> i2s->variant_regs->rfs_off;
256 rfs &= i2s->variant_regs->rfs_mask;
270 /* Write RCLK of I2S (in multiples of LRCLK) */
271 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
273 u32 mod = readl(i2s->addr + I2SMOD);
274 int rfs_shift = i2s->variant_regs->rfs_off;
276 mod &= ~(i2s->variant_regs->rfs_mask << rfs_shift);
280 mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift);
283 mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift);
286 mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift);
289 mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift);
292 mod |= (MOD_RCLK_768FS << rfs_shift);
295 mod |= (MOD_RCLK_512FS << rfs_shift);
298 mod |= (MOD_RCLK_384FS << rfs_shift);
301 mod |= (MOD_RCLK_256FS << rfs_shift);
305 writel(mod, i2s->addr + I2SMOD);
308 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
309 static inline unsigned get_bfs(struct i2s_dai *i2s)
312 bfs = readl(i2s->addr + I2SMOD) >> i2s->variant_regs->bfs_off;
313 bfs &= i2s->variant_regs->bfs_mask;
328 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
329 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
331 u32 mod = readl(i2s->addr + I2SMOD);
332 int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM;
333 int bfs_shift = i2s->variant_regs->bfs_off;
335 /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
336 if (!tdm && bfs > 48) {
337 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
341 mod &= ~(i2s->variant_regs->bfs_mask << bfs_shift);
345 mod |= (MOD_BCLK_48FS << bfs_shift);
348 mod |= (MOD_BCLK_32FS << bfs_shift);
351 mod |= (MOD_BCLK_24FS << bfs_shift);
354 mod |= (MOD_BCLK_16FS << bfs_shift);
357 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
360 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
363 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
366 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
369 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
372 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
376 writel(mod, i2s->addr + I2SMOD);
380 static inline int get_blc(struct i2s_dai *i2s)
382 int blc = readl(i2s->addr + I2SMOD);
384 blc = (blc >> 13) & 0x3;
393 /* TX Channel Control */
394 static void i2s_txctrl(struct i2s_dai *i2s, int on)
396 void __iomem *addr = i2s->addr;
397 int txr_off = i2s->variant_regs->txr_off;
398 u32 con = readl(addr + I2SCON);
399 u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
403 con &= ~CON_TXCH_PAUSE;
405 if (is_secondary(i2s)) {
406 con |= CON_TXSDMA_ACTIVE;
407 con &= ~CON_TXSDMA_PAUSE;
409 con |= CON_TXDMA_ACTIVE;
410 con &= ~CON_TXDMA_PAUSE;
413 if (any_rx_active(i2s))
418 if (is_secondary(i2s)) {
419 con |= CON_TXSDMA_PAUSE;
420 con &= ~CON_TXSDMA_ACTIVE;
422 con |= CON_TXDMA_PAUSE;
423 con &= ~CON_TXDMA_ACTIVE;
426 if (other_tx_active(i2s)) {
427 writel(con, addr + I2SCON);
431 con |= CON_TXCH_PAUSE;
433 if (any_rx_active(i2s))
439 writel(mod, addr + I2SMOD);
440 writel(con, addr + I2SCON);
443 /* RX Channel Control */
444 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
446 void __iomem *addr = i2s->addr;
447 int txr_off = i2s->variant_regs->txr_off;
448 u32 con = readl(addr + I2SCON);
449 u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
452 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
453 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
455 if (any_tx_active(i2s))
460 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
461 con &= ~CON_RXDMA_ACTIVE;
463 if (any_tx_active(i2s))
469 writel(mod, addr + I2SMOD);
470 writel(con, addr + I2SCON);
473 /* Flush FIFO of an interface */
474 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
482 if (is_secondary(i2s))
483 fic = i2s->addr + I2SFICS;
485 fic = i2s->addr + I2SFIC;
488 writel(readl(fic) | flush, fic);
491 val = msecs_to_loops(1) / 1000; /* 1 usec */
495 writel(readl(fic) & ~flush, fic);
498 static int i2s_set_sysclk(struct snd_soc_dai *dai,
499 int clk_id, unsigned int rfs, int dir)
501 struct i2s_dai *i2s = to_info(dai);
502 struct i2s_dai *other = get_other_dai(i2s);
503 const struct samsung_i2s_variant_regs *i2s_regs = i2s->variant_regs;
504 unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
505 unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
506 u32 mod, mask, val = 0;
510 pm_runtime_get_sync(dai->dev);
512 spin_lock_irqsave(i2s->lock, flags);
513 mod = readl(i2s->addr + I2SMOD);
514 spin_unlock_irqrestore(i2s->lock, flags);
517 case SAMSUNG_I2S_OPCLK:
518 mask = MOD_OPCLK_MASK;
519 val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK;
521 case SAMSUNG_I2S_CDCLK:
522 mask = 1 << i2s_regs->cdclkcon_off;
523 /* Shouldn't matter in GATING(CLOCK_IN) mode */
524 if (dir == SND_SOC_CLOCK_IN)
527 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
529 (((dir == SND_SOC_CLOCK_IN)
530 && !(mod & cdcon_mask)) ||
531 ((dir == SND_SOC_CLOCK_OUT)
532 && (mod & cdcon_mask))))) {
533 dev_err(&i2s->pdev->dev,
534 "%s:%d Other DAI busy\n", __func__, __LINE__);
539 if (dir == SND_SOC_CLOCK_IN)
540 val = 1 << i2s_regs->cdclkcon_off;
545 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
546 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
547 mask = 1 << i2s_regs->rclksrc_off;
549 if ((i2s->quirks & QUIRK_NO_MUXPSR)
550 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
555 if (!any_active(i2s)) {
556 if (i2s->op_clk && !IS_ERR(i2s->op_clk)) {
557 if ((clk_id && !(mod & rsrc_mask)) ||
558 (!clk_id && (mod & rsrc_mask))) {
559 clk_disable_unprepare(i2s->op_clk);
560 clk_put(i2s->op_clk);
563 clk_get_rate(i2s->op_clk);
569 i2s->op_clk = clk_get(&i2s->pdev->dev,
572 i2s->op_clk = clk_get(&i2s->pdev->dev,
575 if (WARN_ON(IS_ERR(i2s->op_clk))) {
576 ret = PTR_ERR(i2s->op_clk);
581 ret = clk_prepare_enable(i2s->op_clk);
583 clk_put(i2s->op_clk);
587 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
589 /* Over-ride the other's */
591 other->op_clk = i2s->op_clk;
592 other->rclk_srcrate = i2s->rclk_srcrate;
594 } else if ((!clk_id && (mod & rsrc_mask))
595 || (clk_id && !(mod & rsrc_mask))) {
596 dev_err(&i2s->pdev->dev,
597 "%s:%d Other DAI busy\n", __func__, __LINE__);
601 /* Call can't be on the active DAI */
602 i2s->op_clk = other->op_clk;
603 i2s->rclk_srcrate = other->rclk_srcrate;
608 val = 1 << i2s_regs->rclksrc_off;
611 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
616 spin_lock_irqsave(i2s->lock, flags);
617 mod = readl(i2s->addr + I2SMOD);
618 mod = (mod & ~mask) | val;
619 writel(mod, i2s->addr + I2SMOD);
620 spin_unlock_irqrestore(i2s->lock, flags);
622 pm_runtime_put(dai->dev);
626 pm_runtime_put(dai->dev);
630 static int i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
632 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
633 struct i2s_dai *i2s = to_info(dai);
634 int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
638 lrp_shift = i2s->variant_regs->lrp_off;
639 sdf_shift = i2s->variant_regs->sdf_off;
640 mod_slave = 1 << i2s->variant_regs->mss_off;
642 sdf_mask = MOD_SDF_MASK << sdf_shift;
643 lrp_rlow = MOD_LR_RLOW << lrp_shift;
645 /* Format is priority */
646 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
647 case SND_SOC_DAIFMT_RIGHT_J:
649 tmp |= (MOD_SDF_MSB << sdf_shift);
651 case SND_SOC_DAIFMT_LEFT_J:
653 tmp |= (MOD_SDF_LSB << sdf_shift);
655 case SND_SOC_DAIFMT_I2S:
656 tmp |= (MOD_SDF_IIS << sdf_shift);
659 dev_err(&i2s->pdev->dev, "Format not supported\n");
664 * INV flag is relative to the FORMAT flag - if set it simply
665 * flips the polarity specified by the Standard
667 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
668 case SND_SOC_DAIFMT_NB_NF:
670 case SND_SOC_DAIFMT_NB_IF:
677 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
681 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
682 case SND_SOC_DAIFMT_CBM_CFM:
685 case SND_SOC_DAIFMT_CBS_CFS:
687 * Set default source clock in Master mode, only when the
688 * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
689 * clock configuration assigned in DT is not overwritten.
691 if (i2s->rclk_srcrate == 0 && priv->clk_data.clks == NULL)
692 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
693 0, SND_SOC_CLOCK_IN);
696 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
700 pm_runtime_get_sync(dai->dev);
701 spin_lock_irqsave(i2s->lock, flags);
702 mod = readl(i2s->addr + I2SMOD);
704 * Don't change the I2S mode if any controller is active on this
707 if (any_active(i2s) &&
708 ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
709 spin_unlock_irqrestore(i2s->lock, flags);
710 pm_runtime_put(dai->dev);
711 dev_err(&i2s->pdev->dev,
712 "%s:%d Other DAI busy\n", __func__, __LINE__);
716 mod &= ~(sdf_mask | lrp_rlow | mod_slave);
718 writel(mod, i2s->addr + I2SMOD);
719 spin_unlock_irqrestore(i2s->lock, flags);
720 pm_runtime_put(dai->dev);
725 static int i2s_hw_params(struct snd_pcm_substream *substream,
726 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
728 struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai);
729 struct i2s_dai *i2s = to_info(dai);
730 u32 mod, mask = 0, val = 0;
734 WARN_ON(!pm_runtime_active(dai->dev));
736 if (!is_secondary(i2s))
737 mask |= (MOD_DC2_EN | MOD_DC1_EN);
739 switch (params_channels(params)) {
746 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
747 i2s->dma_playback.addr_width = 4;
749 i2s->dma_capture.addr_width = 4;
752 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
753 i2s->dma_playback.addr_width = 2;
755 i2s->dma_capture.addr_width = 2;
759 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
760 params_channels(params));
764 if (is_secondary(i2s))
765 mask |= MOD_BLCS_MASK;
767 mask |= MOD_BLCP_MASK;
770 mask |= MOD_BLC_MASK;
772 switch (params_width(params)) {
774 if (is_secondary(i2s))
775 val |= MOD_BLCS_8BIT;
777 val |= MOD_BLCP_8BIT;
782 if (is_secondary(i2s))
783 val |= MOD_BLCS_16BIT;
785 val |= MOD_BLCP_16BIT;
787 val |= MOD_BLC_16BIT;
790 if (is_secondary(i2s))
791 val |= MOD_BLCS_24BIT;
793 val |= MOD_BLCP_24BIT;
795 val |= MOD_BLC_24BIT;
798 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
799 params_format(params));
803 spin_lock_irqsave(i2s->lock, flags);
804 mod = readl(i2s->addr + I2SMOD);
805 mod = (mod & ~mask) | val;
806 writel(mod, i2s->addr + I2SMOD);
807 spin_unlock_irqrestore(i2s->lock, flags);
809 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
811 i2s->frmclk = params_rate(params);
813 rclksrc = priv->clk_table[CLK_I2S_RCLK_SRC];
814 if (rclksrc && !IS_ERR(rclksrc))
815 i2s->rclk_srcrate = clk_get_rate(rclksrc);
820 /* We set constraints on the substream acc to the version of I2S */
821 static int i2s_startup(struct snd_pcm_substream *substream,
822 struct snd_soc_dai *dai)
824 struct i2s_dai *i2s = to_info(dai);
825 struct i2s_dai *other = get_other_dai(i2s);
828 pm_runtime_get_sync(dai->dev);
830 spin_lock_irqsave(&lock, flags);
832 i2s->mode |= DAI_OPENED;
834 if (is_manager(other))
835 i2s->mode &= ~DAI_MANAGER;
837 i2s->mode |= DAI_MANAGER;
839 if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR))
840 writel(CON_RSTCLR, i2s->addr + I2SCON);
842 spin_unlock_irqrestore(&lock, flags);
847 static void i2s_shutdown(struct snd_pcm_substream *substream,
848 struct snd_soc_dai *dai)
850 struct i2s_dai *i2s = to_info(dai);
851 struct i2s_dai *other = get_other_dai(i2s);
854 spin_lock_irqsave(&lock, flags);
856 i2s->mode &= ~DAI_OPENED;
857 i2s->mode &= ~DAI_MANAGER;
859 if (is_opened(other))
860 other->mode |= DAI_MANAGER;
862 /* Reset any constraint on RFS and BFS */
866 spin_unlock_irqrestore(&lock, flags);
868 pm_runtime_put(dai->dev);
871 static int config_setup(struct i2s_dai *i2s)
873 struct i2s_dai *other = get_other_dai(i2s);
874 unsigned rfs, bfs, blc;
884 /* Select least possible multiple(2) if no constraint set */
893 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
894 dev_err(&i2s->pdev->dev,
895 "%d-RFS not supported for 24-blc\n", rfs);
900 if (bfs == 16 || bfs == 32)
906 /* If already setup and running */
907 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
908 dev_err(&i2s->pdev->dev,
909 "%s:%d Other DAI busy\n", __func__, __LINE__);
916 /* Don't bother with PSR in Slave mode */
920 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
921 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
922 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
923 dev_dbg(&i2s->pdev->dev,
924 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
925 i2s->rclk_srcrate, psr, rfs, bfs);
931 static int i2s_trigger(struct snd_pcm_substream *substream,
932 int cmd, struct snd_soc_dai *dai)
934 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
935 struct snd_soc_pcm_runtime *rtd = substream->private_data;
936 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
940 case SNDRV_PCM_TRIGGER_START:
941 case SNDRV_PCM_TRIGGER_RESUME:
942 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
943 pm_runtime_get_sync(dai->dev);
944 spin_lock_irqsave(i2s->lock, flags);
946 if (config_setup(i2s)) {
947 spin_unlock_irqrestore(i2s->lock, flags);
956 spin_unlock_irqrestore(i2s->lock, flags);
958 case SNDRV_PCM_TRIGGER_STOP:
959 case SNDRV_PCM_TRIGGER_SUSPEND:
960 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
961 spin_lock_irqsave(i2s->lock, flags);
965 i2s_fifo(i2s, FIC_RXFLUSH);
968 i2s_fifo(i2s, FIC_TXFLUSH);
971 spin_unlock_irqrestore(i2s->lock, flags);
972 pm_runtime_put(dai->dev);
979 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
982 struct i2s_dai *i2s = to_info(dai);
983 struct i2s_dai *other = get_other_dai(i2s);
986 case SAMSUNG_I2S_DIV_BCLK:
987 pm_runtime_get_sync(dai->dev);
988 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
989 || (other && other->bfs && (other->bfs != div))) {
990 pm_runtime_put(dai->dev);
991 dev_err(&i2s->pdev->dev,
992 "%s:%d Other DAI busy\n", __func__, __LINE__);
996 pm_runtime_put(dai->dev);
999 dev_err(&i2s->pdev->dev,
1000 "Invalid clock divider(%d)\n", div_id);
1007 static snd_pcm_sframes_t
1008 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
1010 struct i2s_dai *i2s = to_info(dai);
1011 u32 reg = readl(i2s->addr + I2SFIC);
1012 snd_pcm_sframes_t delay;
1013 const struct samsung_i2s_variant_regs *i2s_regs = i2s->variant_regs;
1015 WARN_ON(!pm_runtime_active(dai->dev));
1017 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
1018 delay = FIC_RXCOUNT(reg);
1019 else if (is_secondary(i2s))
1020 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
1022 delay = (reg >> i2s_regs->ftx0cnt_off) & 0x7f;
1028 static int i2s_suspend(struct snd_soc_dai *dai)
1030 return pm_runtime_force_suspend(dai->dev);
1033 static int i2s_resume(struct snd_soc_dai *dai)
1035 return pm_runtime_force_resume(dai->dev);
1038 #define i2s_suspend NULL
1039 #define i2s_resume NULL
1042 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
1044 struct i2s_dai *i2s = to_info(dai);
1045 struct i2s_dai *other = get_other_dai(i2s);
1046 unsigned long flags;
1048 pm_runtime_get_sync(dai->dev);
1050 if (is_secondary(i2s)) { /* If this is probe on the secondary DAI */
1051 snd_soc_dai_init_dma_data(dai, &other->sec_dai->dma_playback,
1054 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback,
1057 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1058 writel(CON_RSTCLR, i2s->addr + I2SCON);
1060 if (i2s->quirks & QUIRK_SUPPORTS_IDMA)
1061 idma_reg_addr_init(i2s->addr,
1062 i2s->sec_dai->idma_playback.addr);
1065 /* Reset any constraint on RFS and BFS */
1068 i2s->rclk_srcrate = 0;
1070 spin_lock_irqsave(i2s->lock, flags);
1073 i2s_fifo(i2s, FIC_TXFLUSH);
1074 i2s_fifo(other, FIC_TXFLUSH);
1075 i2s_fifo(i2s, FIC_RXFLUSH);
1076 spin_unlock_irqrestore(i2s->lock, flags);
1078 /* Gate CDCLK by default */
1079 if (!is_opened(other))
1080 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1081 0, SND_SOC_CLOCK_IN);
1082 pm_runtime_put(dai->dev);
1087 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1089 struct i2s_dai *i2s = to_info(dai);
1090 unsigned long flags;
1092 pm_runtime_get_sync(dai->dev);
1094 if (!is_secondary(i2s)) {
1095 if (i2s->quirks & QUIRK_NEED_RSTCLR) {
1096 spin_lock_irqsave(i2s->lock, flags);
1097 writel(0, i2s->addr + I2SCON);
1098 spin_unlock_irqrestore(i2s->lock, flags);
1102 pm_runtime_put(dai->dev);
1107 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1108 .trigger = i2s_trigger,
1109 .hw_params = i2s_hw_params,
1110 .set_fmt = i2s_set_fmt,
1111 .set_clkdiv = i2s_set_clkdiv,
1112 .set_sysclk = i2s_set_sysclk,
1113 .startup = i2s_startup,
1114 .shutdown = i2s_shutdown,
1118 static const struct snd_soc_dapm_widget samsung_i2s_widgets[] = {
1120 SND_SOC_DAPM_AIF_OUT("Mixer DAI TX", NULL, 0, SND_SOC_NOPM, 0, 0),
1121 SND_SOC_DAPM_AIF_IN("Mixer DAI RX", NULL, 0, SND_SOC_NOPM, 0, 0),
1123 /* Playback Mixer */
1124 SND_SOC_DAPM_MIXER("Playback Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
1127 static const struct snd_soc_dapm_route samsung_i2s_dapm_routes[] = {
1128 { "Playback Mixer", NULL, "Primary" },
1129 { "Playback Mixer", NULL, "Secondary" },
1131 { "Mixer DAI TX", NULL, "Playback Mixer" },
1132 { "Playback Mixer", NULL, "Mixer DAI RX" },
1135 static const struct snd_soc_component_driver samsung_i2s_component = {
1136 .name = "samsung-i2s",
1138 .dapm_widgets = samsung_i2s_widgets,
1139 .num_dapm_widgets = ARRAY_SIZE(samsung_i2s_widgets),
1141 .dapm_routes = samsung_i2s_dapm_routes,
1142 .num_dapm_routes = ARRAY_SIZE(samsung_i2s_dapm_routes),
1145 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
1146 SNDRV_PCM_FMTBIT_S16_LE | \
1147 SNDRV_PCM_FMTBIT_S24_LE)
1149 static int i2s_alloc_dais(struct samsung_i2s_priv *priv,
1150 const struct samsung_i2s_dai_data *i2s_dai_data,
1153 static const char *dai_names[] = { "samsung-i2s", "samsung-i2s-sec" };
1154 static const char *stream_names[] = { "Primary", "Secondary" };
1155 struct snd_soc_dai_driver *dai_drv;
1156 struct i2s_dai *dai;
1159 priv->dai = devm_kcalloc(&priv->pdev->dev, num_dais,
1160 sizeof(*dai), GFP_KERNEL);
1164 priv->dai_drv = devm_kcalloc(&priv->pdev->dev, num_dais,
1165 sizeof(*dai_drv), GFP_KERNEL);
1169 for (i = 0; i < num_dais; i++) {
1170 dai_drv = &priv->dai_drv[i];
1172 dai_drv->probe = samsung_i2s_dai_probe;
1173 dai_drv->remove = samsung_i2s_dai_remove;
1174 dai_drv->suspend = i2s_suspend;
1175 dai_drv->resume = i2s_resume;
1177 dai_drv->symmetric_rates = 1;
1178 dai_drv->ops = &samsung_i2s_dai_ops;
1180 dai_drv->playback.channels_min = 1;
1181 dai_drv->playback.channels_max = 2;
1182 dai_drv->playback.rates = i2s_dai_data->pcm_rates;
1183 dai_drv->playback.formats = SAMSUNG_I2S_FMTS;
1184 dai_drv->playback.stream_name = stream_names[i];
1186 dai_drv->id = i + 1;
1187 dai_drv->name = dai_names[i];
1189 priv->dai[i].drv = &priv->dai_drv[i];
1190 priv->dai[i].pdev = priv->pdev;
1193 /* Initialize capture only for the primary DAI */
1194 dai_drv = &priv->dai_drv[SAMSUNG_I2S_ID_PRIMARY - 1];
1196 dai_drv->capture.channels_min = 1;
1197 dai_drv->capture.channels_max = 2;
1198 dai_drv->capture.rates = i2s_dai_data->pcm_rates;
1199 dai_drv->capture.formats = SAMSUNG_I2S_FMTS;
1205 static int i2s_runtime_suspend(struct device *dev)
1207 struct i2s_dai *i2s = samsung_i2s_get_pri_dai(dev);
1209 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
1210 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
1211 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
1214 clk_disable_unprepare(i2s->op_clk);
1215 clk_disable_unprepare(i2s->clk);
1220 static int i2s_runtime_resume(struct device *dev)
1222 struct i2s_dai *i2s = samsung_i2s_get_pri_dai(dev);
1225 ret = clk_prepare_enable(i2s->clk);
1230 ret = clk_prepare_enable(i2s->op_clk);
1232 clk_disable_unprepare(i2s->clk);
1237 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
1238 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
1239 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
1243 #endif /* CONFIG_PM */
1245 static void i2s_unregister_clocks(struct samsung_i2s_priv *priv)
1249 for (i = 0; i < priv->clk_data.clk_num; i++) {
1250 if (!IS_ERR(priv->clk_table[i]))
1251 clk_unregister(priv->clk_table[i]);
1255 static void i2s_unregister_clock_provider(struct samsung_i2s_priv *priv)
1257 of_clk_del_provider(priv->pdev->dev.of_node);
1258 i2s_unregister_clocks(priv);
1262 static int i2s_register_clock_provider(struct samsung_i2s_priv *priv)
1265 const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1266 const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1267 const char *p_names[2] = { NULL };
1268 struct device *dev = &priv->pdev->dev;
1269 struct i2s_dai *i2s = samsung_i2s_get_pri_dai(dev);
1270 const struct samsung_i2s_variant_regs *reg_info = i2s->variant_regs;
1271 const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1272 struct clk *rclksrc;
1275 /* Register the clock provider only if it's expected in the DTB */
1276 if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1279 /* Get the RCLKSRC mux clock parent clock names */
1280 for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1281 rclksrc = clk_get(dev, clk_name[i]);
1282 if (IS_ERR(rclksrc))
1284 p_names[i] = __clk_get_name(rclksrc);
1288 for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1289 i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1290 dev_name(dev), i2s_clk_desc[i]);
1291 if (!i2s_clk_name[i])
1295 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
1296 /* Activate the prescaler */
1297 u32 val = readl(i2s->addr + I2SPSR);
1298 writel(val | PSR_PSREN, i2s->addr + I2SPSR);
1300 priv->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1301 i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1302 ARRAY_SIZE(p_names),
1303 CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1304 i2s->addr + I2SMOD, reg_info->rclksrc_off,
1307 priv->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1308 i2s_clk_name[CLK_I2S_RCLK_PSR],
1309 i2s_clk_name[CLK_I2S_RCLK_SRC],
1310 CLK_SET_RATE_PARENT,
1311 i2s->addr + I2SPSR, 8, 6, 0, i2s->lock);
1313 p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1314 priv->clk_data.clk_num = 2;
1317 priv->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1318 i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1319 CLK_SET_RATE_PARENT,
1320 i2s->addr + I2SMOD, reg_info->cdclkcon_off,
1321 CLK_GATE_SET_TO_DISABLE, i2s->lock);
1323 priv->clk_data.clk_num += 1;
1324 priv->clk_data.clks = priv->clk_table;
1326 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1329 dev_err(dev, "failed to add clock provider: %d\n", ret);
1330 i2s_unregister_clocks(priv);
1336 /* Create platform device for the secondary PCM */
1337 static int i2s_create_secondary_device(struct samsung_i2s_priv *priv)
1339 struct platform_device *pdev;
1342 pdev = platform_device_register_simple("samsung-i2s-sec", -1, NULL, 0);
1346 ret = device_attach(&pdev->dev);
1348 dev_info(&pdev->dev, "device_attach() failed\n");
1352 priv->pdev_sec = pdev;
1357 static void i2s_delete_secondary_device(struct samsung_i2s_priv *priv)
1359 if (priv->pdev_sec) {
1360 platform_device_del(priv->pdev_sec);
1361 priv->pdev_sec = NULL;
1364 static int samsung_i2s_probe(struct platform_device *pdev)
1366 struct i2s_dai *pri_dai, *sec_dai = NULL;
1367 struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1368 struct resource *res;
1369 u32 regs_base, quirks = 0, idma_addr = 0;
1370 struct device_node *np = pdev->dev.of_node;
1371 const struct samsung_i2s_dai_data *i2s_dai_data;
1373 struct samsung_i2s_priv *priv;
1375 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node)
1376 i2s_dai_data = of_device_get_match_data(&pdev->dev);
1378 i2s_dai_data = (struct samsung_i2s_dai_data *)
1379 platform_get_device_id(pdev)->driver_data;
1381 /* Nothing to do if it is the secondary device probe */
1385 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1389 quirks = np ? i2s_dai_data->quirks : i2s_pdata->type.quirks;
1390 num_dais = (quirks & QUIRK_SEC_DAI) ? 2 : 1;
1393 ret = i2s_alloc_dais(priv, i2s_dai_data, num_dais);
1397 pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];
1399 spin_lock_init(&priv->spinlock);
1400 pri_dai->lock = &priv->spinlock;
1403 if (i2s_pdata == NULL) {
1404 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1408 pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1409 pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1410 pri_dai->filter = i2s_pdata->dma_filter;
1412 idma_addr = i2s_pdata->type.idma_addr;
1414 if (of_property_read_u32(np, "samsung,idma-addr",
1416 if (quirks & QUIRK_SUPPORTS_IDMA) {
1417 dev_info(&pdev->dev, "idma address is not"\
1423 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1424 pri_dai->addr = devm_ioremap_resource(&pdev->dev, res);
1425 if (IS_ERR(pri_dai->addr))
1426 return PTR_ERR(pri_dai->addr);
1428 regs_base = res->start;
1430 pri_dai->clk = devm_clk_get(&pdev->dev, "iis");
1431 if (IS_ERR(pri_dai->clk)) {
1432 dev_err(&pdev->dev, "Failed to get iis clock\n");
1433 return PTR_ERR(pri_dai->clk);
1436 ret = clk_prepare_enable(pri_dai->clk);
1438 dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1441 pri_dai->dma_playback.addr = regs_base + I2STXD;
1442 pri_dai->dma_capture.addr = regs_base + I2SRXD;
1443 pri_dai->dma_playback.chan_name = "tx";
1444 pri_dai->dma_capture.chan_name = "rx";
1445 pri_dai->dma_playback.addr_width = 4;
1446 pri_dai->dma_capture.addr_width = 4;
1447 pri_dai->quirks = quirks;
1448 pri_dai->variant_regs = i2s_dai_data->i2s_variant_regs;
1449 pri_dai->priv = priv;
1451 if (quirks & QUIRK_PRI_6CHAN)
1452 pri_dai->drv->playback.channels_max = 6;
1454 ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1457 goto err_disable_clk;
1459 if (quirks & QUIRK_SEC_DAI) {
1460 sec_dai = &priv->dai[SAMSUNG_I2S_ID_SECONDARY - 1];
1462 sec_dai->lock = &priv->spinlock;
1463 sec_dai->variant_regs = pri_dai->variant_regs;
1464 sec_dai->dma_playback.addr = regs_base + I2STXDS;
1465 sec_dai->dma_playback.chan_name = "tx-sec";
1468 sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1469 sec_dai->filter = i2s_pdata->dma_filter;
1472 sec_dai->dma_playback.addr_width = 4;
1473 sec_dai->addr = pri_dai->addr;
1474 sec_dai->clk = pri_dai->clk;
1475 sec_dai->quirks = quirks;
1476 sec_dai->idma_playback.addr = idma_addr;
1477 sec_dai->pri_dai = pri_dai;
1478 sec_dai->priv = priv;
1479 pri_dai->sec_dai = sec_dai;
1481 ret = i2s_create_secondary_device(priv);
1483 goto err_disable_clk;
1485 ret = samsung_asoc_dma_platform_register(&priv->pdev_sec->dev,
1486 sec_dai->filter, "tx-sec", NULL,
1489 goto err_disable_clk;
1493 if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1494 dev_err(&pdev->dev, "Unable to configure gpio\n");
1496 goto err_disable_clk;
1499 dev_set_drvdata(&pdev->dev, priv);
1501 ret = devm_snd_soc_register_component(&pdev->dev,
1502 &samsung_i2s_component,
1503 priv->dai_drv, num_dais);
1505 goto err_disable_clk;
1507 pm_runtime_set_active(&pdev->dev);
1508 pm_runtime_enable(&pdev->dev);
1510 ret = i2s_register_clock_provider(priv);
1512 goto err_disable_pm;
1514 pri_dai->op_clk = clk_get_parent(priv->clk_table[CLK_I2S_RCLK_SRC]);
1519 pm_runtime_disable(&pdev->dev);
1521 clk_disable_unprepare(pri_dai->clk);
1522 i2s_delete_secondary_device(priv);
1526 static int samsung_i2s_remove(struct platform_device *pdev)
1528 struct samsung_i2s_priv *priv = dev_get_drvdata(&pdev->dev);
1529 struct i2s_dai *pri_dai = samsung_i2s_get_pri_dai(&pdev->dev);
1531 /* The secondary device has no driver data assigned */
1535 pm_runtime_get_sync(&pdev->dev);
1536 pm_runtime_disable(&pdev->dev);
1538 i2s_unregister_clock_provider(priv);
1539 clk_disable_unprepare(pri_dai->clk);
1540 pm_runtime_put_noidle(&pdev->dev);
1541 i2s_delete_secondary_device(priv);
1546 static const struct samsung_i2s_variant_regs i2sv3_regs = {
1560 static const struct samsung_i2s_variant_regs i2sv6_regs = {
1574 static const struct samsung_i2s_variant_regs i2sv7_regs = {
1588 static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1602 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1603 .quirks = QUIRK_NO_MUXPSR,
1604 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1605 .i2s_variant_regs = &i2sv3_regs,
1608 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1609 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1610 QUIRK_SUPPORTS_IDMA,
1611 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1612 .i2s_variant_regs = &i2sv3_regs,
1615 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1616 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1617 QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1618 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1619 .i2s_variant_regs = &i2sv6_regs,
1622 static const struct samsung_i2s_dai_data i2sv7_dai_type = {
1623 .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1625 .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1626 .i2s_variant_regs = &i2sv7_regs,
1629 static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 = {
1630 .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1631 .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1632 .i2s_variant_regs = &i2sv5_i2s1_regs,
1635 static const struct platform_device_id samsung_i2s_driver_ids[] = {
1637 .name = "samsung-i2s",
1638 .driver_data = (kernel_ulong_t)&i2sv3_dai_type,
1640 .name = "samsung-i2s-sec",
1644 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1647 static const struct of_device_id exynos_i2s_match[] = {
1649 .compatible = "samsung,s3c6410-i2s",
1650 .data = &i2sv3_dai_type,
1652 .compatible = "samsung,s5pv210-i2s",
1653 .data = &i2sv5_dai_type,
1655 .compatible = "samsung,exynos5420-i2s",
1656 .data = &i2sv6_dai_type,
1658 .compatible = "samsung,exynos7-i2s",
1659 .data = &i2sv7_dai_type,
1661 .compatible = "samsung,exynos7-i2s1",
1662 .data = &i2sv5_dai_type_i2s1,
1666 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1669 static const struct dev_pm_ops samsung_i2s_pm = {
1670 SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1671 i2s_runtime_resume, NULL)
1672 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1673 pm_runtime_force_resume)
1676 static struct platform_driver samsung_i2s_driver = {
1677 .probe = samsung_i2s_probe,
1678 .remove = samsung_i2s_remove,
1679 .id_table = samsung_i2s_driver_ids,
1681 .name = "samsung-i2s",
1682 .of_match_table = of_match_ptr(exynos_i2s_match),
1683 .pm = &samsung_i2s_pm,
1687 module_platform_driver(samsung_i2s_driver);
1689 /* Module information */
1690 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1691 MODULE_DESCRIPTION("Samsung I2S Interface");
1692 MODULE_ALIAS("platform:samsung-i2s");
1693 MODULE_LICENSE("GPL");