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 <jassi.brar@samsung.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 <sound/soc.h>
20 #include <sound/pcm_params.h>
22 #include <plat/audio.h>
29 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
32 /* Platform device for this DAI */
33 struct platform_device *pdev;
36 /* Physical base address of SFRs */
38 /* Rate of RCLK source clock */
39 unsigned long rclk_srcrate;
43 * Specifically requested RCLK,BCLK by MACHINE Driver.
44 * 0 indicates CPU driver is free to choose any value.
47 /* I2S Controller's core clock */
49 /* Clock for generating I2S signals */
51 /* Array of clock names for op_clk */
53 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
54 struct i2s_dai *pri_dai;
55 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
56 struct i2s_dai *sec_dai;
57 #define DAI_OPENED (1 << 0) /* Dai is opened */
58 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
60 /* Driver for this DAI */
61 struct snd_soc_dai_driver i2s_dai_drv;
63 struct s3c_dma_params dma_playback;
64 struct s3c_dma_params dma_capture;
65 struct s3c_dma_params idma_playback;
72 /* Lock for cross i/f checks */
73 static DEFINE_SPINLOCK(lock);
75 /* If this is the 'overlay' stereo DAI */
76 static inline bool is_secondary(struct i2s_dai *i2s)
78 return i2s->pri_dai ? true : false;
81 /* If operating in SoC-Slave mode */
82 static inline bool is_slave(struct i2s_dai *i2s)
84 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
87 /* If this interface of the controller is transmitting data */
88 static inline bool tx_active(struct i2s_dai *i2s)
95 active = readl(i2s->addr + I2SCON);
97 if (is_secondary(i2s))
98 active &= CON_TXSDMA_ACTIVE;
100 active &= CON_TXDMA_ACTIVE;
102 return active ? true : false;
105 /* If the other interface of the controller is transmitting data */
106 static inline bool other_tx_active(struct i2s_dai *i2s)
108 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
110 return tx_active(other);
113 /* If any interface of the controller is transmitting data */
114 static inline bool any_tx_active(struct i2s_dai *i2s)
116 return tx_active(i2s) || other_tx_active(i2s);
119 /* If this interface of the controller is receiving data */
120 static inline bool rx_active(struct i2s_dai *i2s)
127 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
129 return active ? true : false;
132 /* If the other interface of the controller is receiving data */
133 static inline bool other_rx_active(struct i2s_dai *i2s)
135 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
137 return rx_active(other);
140 /* If any interface of the controller is receiving data */
141 static inline bool any_rx_active(struct i2s_dai *i2s)
143 return rx_active(i2s) || other_rx_active(i2s);
146 /* If the other DAI is transmitting or receiving data */
147 static inline bool other_active(struct i2s_dai *i2s)
149 return other_rx_active(i2s) || other_tx_active(i2s);
152 /* If this DAI is transmitting or receiving data */
153 static inline bool this_active(struct i2s_dai *i2s)
155 return tx_active(i2s) || rx_active(i2s);
158 /* If the controller is active anyway */
159 static inline bool any_active(struct i2s_dai *i2s)
161 return this_active(i2s) || other_active(i2s);
164 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
166 return snd_soc_dai_get_drvdata(dai);
169 static inline bool is_opened(struct i2s_dai *i2s)
171 if (i2s && (i2s->mode & DAI_OPENED))
177 static inline bool is_manager(struct i2s_dai *i2s)
179 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
185 /* Read RCLK of I2S (in multiples of LRCLK) */
186 static inline unsigned get_rfs(struct i2s_dai *i2s)
188 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
198 /* Write RCLK of I2S (in multiples of LRCLK) */
199 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
201 u32 mod = readl(i2s->addr + I2SMOD);
203 mod &= ~MOD_RCLK_MASK;
207 mod |= MOD_RCLK_768FS;
210 mod |= MOD_RCLK_512FS;
213 mod |= MOD_RCLK_384FS;
216 mod |= MOD_RCLK_256FS;
220 writel(mod, i2s->addr + I2SMOD);
223 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
224 static inline unsigned get_bfs(struct i2s_dai *i2s)
226 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
236 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
237 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
239 u32 mod = readl(i2s->addr + I2SMOD);
241 mod &= ~MOD_BCLK_MASK;
245 mod |= MOD_BCLK_48FS;
248 mod |= MOD_BCLK_32FS;
251 mod |= MOD_BCLK_24FS;
254 mod |= MOD_BCLK_16FS;
257 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
261 writel(mod, i2s->addr + I2SMOD);
265 static inline int get_blc(struct i2s_dai *i2s)
267 int blc = readl(i2s->addr + I2SMOD);
269 blc = (blc >> 13) & 0x3;
278 /* TX Channel Control */
279 static void i2s_txctrl(struct i2s_dai *i2s, int on)
281 void __iomem *addr = i2s->addr;
282 u32 con = readl(addr + I2SCON);
283 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
287 con &= ~CON_TXCH_PAUSE;
289 if (is_secondary(i2s)) {
290 con |= CON_TXSDMA_ACTIVE;
291 con &= ~CON_TXSDMA_PAUSE;
293 con |= CON_TXDMA_ACTIVE;
294 con &= ~CON_TXDMA_PAUSE;
297 if (any_rx_active(i2s))
302 if (is_secondary(i2s)) {
303 con |= CON_TXSDMA_PAUSE;
304 con &= ~CON_TXSDMA_ACTIVE;
306 con |= CON_TXDMA_PAUSE;
307 con &= ~CON_TXDMA_ACTIVE;
310 if (other_tx_active(i2s)) {
311 writel(con, addr + I2SCON);
315 con |= CON_TXCH_PAUSE;
317 if (any_rx_active(i2s))
323 writel(mod, addr + I2SMOD);
324 writel(con, addr + I2SCON);
327 /* RX Channel Control */
328 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
330 void __iomem *addr = i2s->addr;
331 u32 con = readl(addr + I2SCON);
332 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
335 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
336 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
338 if (any_tx_active(i2s))
343 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
344 con &= ~CON_RXDMA_ACTIVE;
346 if (any_tx_active(i2s))
352 writel(mod, addr + I2SMOD);
353 writel(con, addr + I2SCON);
356 /* Flush FIFO of an interface */
357 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
365 if (is_secondary(i2s))
366 fic = i2s->addr + I2SFICS;
368 fic = i2s->addr + I2SFIC;
371 writel(readl(fic) | flush, fic);
374 val = msecs_to_loops(1) / 1000; /* 1 usec */
378 writel(readl(fic) & ~flush, fic);
381 static int i2s_set_sysclk(struct snd_soc_dai *dai,
382 int clk_id, unsigned int rfs, int dir)
384 struct i2s_dai *i2s = to_info(dai);
385 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
386 u32 mod = readl(i2s->addr + I2SMOD);
389 case SAMSUNG_I2S_CDCLK:
390 /* Shouldn't matter in GATING(CLOCK_IN) mode */
391 if (dir == SND_SOC_CLOCK_IN)
394 if ((rfs && other->rfs && (other->rfs != rfs)) ||
396 (((dir == SND_SOC_CLOCK_IN)
397 && !(mod & MOD_CDCLKCON)) ||
398 ((dir == SND_SOC_CLOCK_OUT)
399 && (mod & MOD_CDCLKCON))))) {
400 dev_err(&i2s->pdev->dev,
401 "%s:%d Other DAI busy\n", __func__, __LINE__);
405 if (dir == SND_SOC_CLOCK_IN)
408 mod &= ~MOD_CDCLKCON;
413 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
414 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
415 if ((i2s->quirks & QUIRK_NO_MUXPSR)
416 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
421 if (!any_active(i2s)) {
423 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
424 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
425 clk_disable(i2s->op_clk);
426 clk_put(i2s->op_clk);
429 clk_get_rate(i2s->op_clk);
434 i2s->op_clk = clk_get(&i2s->pdev->dev,
435 i2s->src_clk[clk_id]);
436 clk_enable(i2s->op_clk);
437 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
439 /* Over-ride the other's */
441 other->op_clk = i2s->op_clk;
442 other->rclk_srcrate = i2s->rclk_srcrate;
444 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
445 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
446 dev_err(&i2s->pdev->dev,
447 "%s:%d Other DAI busy\n", __func__, __LINE__);
450 /* Call can't be on the active DAI */
451 i2s->op_clk = other->op_clk;
452 i2s->rclk_srcrate = other->rclk_srcrate;
457 mod &= ~MOD_IMS_SYSMUX;
459 mod |= MOD_IMS_SYSMUX;
463 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
467 writel(mod, i2s->addr + I2SMOD);
472 static int i2s_set_fmt(struct snd_soc_dai *dai,
475 struct i2s_dai *i2s = to_info(dai);
476 u32 mod = readl(i2s->addr + I2SMOD);
479 /* Format is priority */
480 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
481 case SND_SOC_DAIFMT_RIGHT_J:
485 case SND_SOC_DAIFMT_LEFT_J:
489 case SND_SOC_DAIFMT_I2S:
493 dev_err(&i2s->pdev->dev, "Format not supported\n");
498 * INV flag is relative to the FORMAT flag - if set it simply
499 * flips the polarity specified by the Standard
501 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
502 case SND_SOC_DAIFMT_NB_NF:
504 case SND_SOC_DAIFMT_NB_IF:
505 if (tmp & MOD_LR_RLOW)
511 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
515 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
516 case SND_SOC_DAIFMT_CBM_CFM:
519 case SND_SOC_DAIFMT_CBS_CFS:
520 /* Set default source clock in Master mode */
521 if (i2s->rclk_srcrate == 0)
522 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
523 0, SND_SOC_CLOCK_IN);
526 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
530 if (any_active(i2s) &&
531 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
532 | MOD_SLAVE)) != tmp)) {
533 dev_err(&i2s->pdev->dev,
534 "%s:%d Other DAI busy\n", __func__, __LINE__);
538 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
540 writel(mod, i2s->addr + I2SMOD);
545 static int i2s_hw_params(struct snd_pcm_substream *substream,
546 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
548 struct i2s_dai *i2s = to_info(dai);
549 u32 mod = readl(i2s->addr + I2SMOD);
551 if (!is_secondary(i2s))
552 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
554 switch (params_channels(params)) {
563 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
564 params_channels(params));
568 if (is_secondary(i2s))
569 mod &= ~MOD_BLCS_MASK;
571 mod &= ~MOD_BLCP_MASK;
574 mod &= ~MOD_BLC_MASK;
576 switch (params_format(params)) {
577 case SNDRV_PCM_FORMAT_S8:
578 if (is_secondary(i2s))
579 mod |= MOD_BLCS_8BIT;
581 mod |= MOD_BLCP_8BIT;
585 case SNDRV_PCM_FORMAT_S16_LE:
586 if (is_secondary(i2s))
587 mod |= MOD_BLCS_16BIT;
589 mod |= MOD_BLCP_16BIT;
591 mod |= MOD_BLC_16BIT;
593 case SNDRV_PCM_FORMAT_S24_LE:
594 if (is_secondary(i2s))
595 mod |= MOD_BLCS_24BIT;
597 mod |= MOD_BLCP_24BIT;
599 mod |= MOD_BLC_24BIT;
602 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
603 params_format(params));
606 writel(mod, i2s->addr + I2SMOD);
608 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
609 snd_soc_dai_set_dma_data(dai, substream,
610 (void *)&i2s->dma_playback);
612 snd_soc_dai_set_dma_data(dai, substream,
613 (void *)&i2s->dma_capture);
615 i2s->frmclk = params_rate(params);
620 /* We set constraints on the substream acc to the version of I2S */
621 static int i2s_startup(struct snd_pcm_substream *substream,
622 struct snd_soc_dai *dai)
624 struct i2s_dai *i2s = to_info(dai);
625 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
628 spin_lock_irqsave(&lock, flags);
630 i2s->mode |= DAI_OPENED;
632 if (is_manager(other))
633 i2s->mode &= ~DAI_MANAGER;
635 i2s->mode |= DAI_MANAGER;
637 /* Enforce set_sysclk in Master mode */
638 i2s->rclk_srcrate = 0;
640 spin_unlock_irqrestore(&lock, flags);
645 static void i2s_shutdown(struct snd_pcm_substream *substream,
646 struct snd_soc_dai *dai)
648 struct i2s_dai *i2s = to_info(dai);
649 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
652 spin_lock_irqsave(&lock, flags);
654 i2s->mode &= ~DAI_OPENED;
655 i2s->mode &= ~DAI_MANAGER;
657 if (is_opened(other))
658 other->mode |= DAI_MANAGER;
660 /* Reset any constraint on RFS and BFS */
664 spin_unlock_irqrestore(&lock, flags);
666 /* Gate CDCLK by default */
667 if (!is_opened(other))
668 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
669 0, SND_SOC_CLOCK_IN);
672 static int config_setup(struct i2s_dai *i2s)
674 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
675 unsigned rfs, bfs, blc;
685 /* Select least possible multiple(2) if no constraint set */
694 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
695 dev_err(&i2s->pdev->dev,
696 "%d-RFS not supported for 24-blc\n", rfs);
701 if (bfs == 16 || bfs == 32)
707 /* If already setup and running */
708 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
709 dev_err(&i2s->pdev->dev,
710 "%s:%d Other DAI busy\n", __func__, __LINE__);
714 /* Don't bother RFS, BFS & PSR in Slave mode */
721 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
722 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
723 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
724 dev_dbg(&i2s->pdev->dev,
725 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
726 i2s->rclk_srcrate, psr, rfs, bfs);
732 static int i2s_trigger(struct snd_pcm_substream *substream,
733 int cmd, struct snd_soc_dai *dai)
735 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
736 struct snd_soc_pcm_runtime *rtd = substream->private_data;
737 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
741 case SNDRV_PCM_TRIGGER_START:
742 case SNDRV_PCM_TRIGGER_RESUME:
743 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
744 local_irq_save(flags);
746 if (config_setup(i2s)) {
747 local_irq_restore(flags);
756 local_irq_restore(flags);
758 case SNDRV_PCM_TRIGGER_STOP:
759 case SNDRV_PCM_TRIGGER_SUSPEND:
760 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
761 local_irq_save(flags);
769 i2s_fifo(i2s, FIC_RXFLUSH);
771 i2s_fifo(i2s, FIC_TXFLUSH);
773 local_irq_restore(flags);
780 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
783 struct i2s_dai *i2s = to_info(dai);
784 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
787 case SAMSUNG_I2S_DIV_BCLK:
788 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
789 || (other && other->bfs && (other->bfs != div))) {
790 dev_err(&i2s->pdev->dev,
791 "%s:%d Other DAI busy\n", __func__, __LINE__);
797 dev_err(&i2s->pdev->dev,
798 "Invalid clock divider(%d)\n", div_id);
805 static snd_pcm_sframes_t
806 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
808 struct i2s_dai *i2s = to_info(dai);
809 u32 reg = readl(i2s->addr + I2SFIC);
810 snd_pcm_sframes_t delay;
812 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
813 delay = FIC_RXCOUNT(reg);
814 else if (is_secondary(i2s))
815 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
817 delay = FIC_TXCOUNT(reg);
823 static int i2s_suspend(struct snd_soc_dai *dai)
825 struct i2s_dai *i2s = to_info(dai);
828 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
829 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
830 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
836 static int i2s_resume(struct snd_soc_dai *dai)
838 struct i2s_dai *i2s = to_info(dai);
841 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
842 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
843 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
849 #define i2s_suspend NULL
850 #define i2s_resume NULL
853 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
855 struct i2s_dai *i2s = to_info(dai);
856 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
858 if (other && other->clk) /* If this is probe on secondary */
861 i2s->addr = ioremap(i2s->base, 0x100);
862 if (i2s->addr == NULL) {
863 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
867 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
868 if (IS_ERR(i2s->clk)) {
869 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
873 clk_enable(i2s->clk);
876 other->addr = i2s->addr;
877 other->clk = i2s->clk;
880 if (i2s->quirks & QUIRK_NEED_RSTCLR)
881 writel(CON_RSTCLR, i2s->addr + I2SCON);
883 if (i2s->quirks & QUIRK_SEC_DAI)
884 idma_reg_addr_init((void *)i2s->addr,
885 i2s->sec_dai->idma_playback.dma_addr);
888 /* Reset any constraint on RFS and BFS */
893 i2s_fifo(i2s, FIC_TXFLUSH);
894 i2s_fifo(other, FIC_TXFLUSH);
895 i2s_fifo(i2s, FIC_RXFLUSH);
897 /* Gate CDCLK by default */
898 if (!is_opened(other))
899 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
900 0, SND_SOC_CLOCK_IN);
905 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
907 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
908 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
910 if (!other || !other->clk) {
912 if (i2s->quirks & QUIRK_NEED_RSTCLR)
913 writel(0, i2s->addr + I2SCON);
915 clk_disable(i2s->clk);
926 static struct snd_soc_dai_ops samsung_i2s_dai_ops = {
927 .trigger = i2s_trigger,
928 .hw_params = i2s_hw_params,
929 .set_fmt = i2s_set_fmt,
930 .set_clkdiv = i2s_set_clkdiv,
931 .set_sysclk = i2s_set_sysclk,
932 .startup = i2s_startup,
933 .shutdown = i2s_shutdown,
937 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
939 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
940 SNDRV_PCM_FMTBIT_S16_LE | \
941 SNDRV_PCM_FMTBIT_S24_LE)
944 struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
948 i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL);
955 i2s->i2s_dai_drv.symmetric_rates = 1;
956 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
957 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
958 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
959 i2s->i2s_dai_drv.suspend = i2s_suspend;
960 i2s->i2s_dai_drv.resume = i2s_resume;
961 i2s->i2s_dai_drv.playback.channels_min = 2;
962 i2s->i2s_dai_drv.playback.channels_max = 2;
963 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
964 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
967 i2s->i2s_dai_drv.capture.channels_min = 2;
968 i2s->i2s_dai_drv.capture.channels_max = 2;
969 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
970 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
971 } else { /* Create a new platform_device for Secondary */
972 i2s->pdev = platform_device_register_resndata(NULL,
973 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
975 if (IS_ERR(i2s->pdev)) {
981 /* Pre-assign snd_soc_dai_set_drvdata */
982 dev_set_drvdata(&i2s->pdev->dev, i2s);
987 static __devinit int samsung_i2s_probe(struct platform_device *pdev)
989 u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
990 struct i2s_dai *pri_dai, *sec_dai = NULL;
991 struct s3c_audio_pdata *i2s_pdata;
992 struct samsung_i2s *i2s_cfg;
993 struct resource *res;
994 u32 regs_base, quirks;
997 /* Call during Seconday interface registration */
998 if (pdev->id >= SAMSUNG_I2S_SECOFF) {
999 sec_dai = dev_get_drvdata(&pdev->dev);
1000 snd_soc_register_dai(&sec_dai->pdev->dev,
1001 &sec_dai->i2s_dai_drv);
1005 i2s_pdata = pdev->dev.platform_data;
1006 if (i2s_pdata == NULL) {
1007 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1011 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1013 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
1016 dma_pl_chan = res->start;
1018 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1020 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
1023 dma_cp_chan = res->start;
1025 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1027 dma_pl_sec_chan = res->start;
1029 dma_pl_sec_chan = 0;
1031 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1033 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1037 if (!request_mem_region(res->start, resource_size(res),
1039 dev_err(&pdev->dev, "Unable to request SFR region\n");
1042 regs_base = res->start;
1044 i2s_cfg = &i2s_pdata->type.i2s;
1045 quirks = i2s_cfg->quirks;
1047 pri_dai = i2s_alloc_dai(pdev, false);
1049 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1054 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1055 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1056 pri_dai->dma_playback.client =
1057 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1058 pri_dai->dma_capture.client =
1059 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1060 pri_dai->dma_playback.channel = dma_pl_chan;
1061 pri_dai->dma_capture.channel = dma_cp_chan;
1062 pri_dai->src_clk = i2s_cfg->src_clk;
1063 pri_dai->dma_playback.dma_size = 4;
1064 pri_dai->dma_capture.dma_size = 4;
1065 pri_dai->base = regs_base;
1066 pri_dai->quirks = quirks;
1068 if (quirks & QUIRK_PRI_6CHAN)
1069 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1071 if (quirks & QUIRK_SEC_DAI) {
1072 sec_dai = i2s_alloc_dai(pdev, true);
1074 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1078 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1079 sec_dai->dma_playback.client =
1080 (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1081 /* Use iDMA always if SysDMA not provided */
1082 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
1083 sec_dai->src_clk = i2s_cfg->src_clk;
1084 sec_dai->dma_playback.dma_size = 4;
1085 sec_dai->base = regs_base;
1086 sec_dai->quirks = quirks;
1087 sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr;
1088 sec_dai->pri_dai = pri_dai;
1089 pri_dai->sec_dai = sec_dai;
1092 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1093 dev_err(&pdev->dev, "Unable to configure gpio\n");
1098 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
1106 release_mem_region(regs_base, resource_size(res));
1111 static __devexit int samsung_i2s_remove(struct platform_device *pdev)
1113 struct i2s_dai *i2s, *other;
1115 i2s = dev_get_drvdata(&pdev->dev);
1116 other = i2s->pri_dai ? : i2s->sec_dai;
1119 other->pri_dai = NULL;
1120 other->sec_dai = NULL;
1122 struct resource *res;
1123 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1125 release_mem_region(res->start, resource_size(res));
1128 i2s->pri_dai = NULL;
1129 i2s->sec_dai = NULL;
1133 snd_soc_unregister_dai(&pdev->dev);
1138 static struct platform_driver samsung_i2s_driver = {
1139 .probe = samsung_i2s_probe,
1140 .remove = __devexit_p(samsung_i2s_remove),
1142 .name = "samsung-i2s",
1143 .owner = THIS_MODULE,
1147 static int __init samsung_i2s_init(void)
1149 return platform_driver_register(&samsung_i2s_driver);
1151 module_init(samsung_i2s_init);
1153 static void __exit samsung_i2s_exit(void)
1155 platform_driver_unregister(&samsung_i2s_driver);
1157 module_exit(samsung_i2s_exit);
1159 /* Module information */
1160 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
1161 MODULE_DESCRIPTION("Samsung I2S Interface");
1162 MODULE_ALIAS("platform:samsung-i2s");
1163 MODULE_LICENSE("GPL");