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>
18 #include <sound/soc.h>
19 #include <sound/pcm_params.h>
21 #include <plat/audio.h>
27 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
30 /* Platform device for this DAI */
31 struct platform_device *pdev;
34 /* Physical base address of SFRs */
36 /* Rate of RCLK source clock */
37 unsigned long rclk_srcrate;
41 * Specifically requested RCLK,BCLK by MACHINE Driver.
42 * 0 indicates CPU driver is free to choose any value.
45 /* I2S Controller's core clock */
47 /* Clock for generating I2S signals */
49 /* Array of clock names for op_clk */
51 /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
52 struct i2s_dai *pri_dai;
53 /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
54 struct i2s_dai *sec_dai;
55 #define DAI_OPENED (1 << 0) /* Dai is opened */
56 #define DAI_MANAGER (1 << 1) /* Dai is the manager */
58 /* Driver for this DAI */
59 struct snd_soc_dai_driver i2s_dai_drv;
61 struct s3c_dma_params dma_playback;
62 struct s3c_dma_params dma_capture;
69 /* Lock for cross i/f checks */
70 static DEFINE_SPINLOCK(lock);
72 /* If this is the 'overlay' stereo DAI */
73 static inline bool is_secondary(struct i2s_dai *i2s)
75 return i2s->pri_dai ? true : false;
78 /* If operating in SoC-Slave mode */
79 static inline bool is_slave(struct i2s_dai *i2s)
81 return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
84 /* If this interface of the controller is transmitting data */
85 static inline bool tx_active(struct i2s_dai *i2s)
92 active = readl(i2s->addr + I2SCON);
94 if (is_secondary(i2s))
95 active &= CON_TXSDMA_ACTIVE;
97 active &= CON_TXDMA_ACTIVE;
99 return active ? true : false;
102 /* If the other interface of the controller is transmitting data */
103 static inline bool other_tx_active(struct i2s_dai *i2s)
105 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
107 return tx_active(other);
110 /* If any interface of the controller is transmitting data */
111 static inline bool any_tx_active(struct i2s_dai *i2s)
113 return tx_active(i2s) || other_tx_active(i2s);
116 /* If this interface of the controller is receiving data */
117 static inline bool rx_active(struct i2s_dai *i2s)
124 active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
126 return active ? true : false;
129 /* If the other interface of the controller is receiving data */
130 static inline bool other_rx_active(struct i2s_dai *i2s)
132 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
134 return rx_active(other);
137 /* If any interface of the controller is receiving data */
138 static inline bool any_rx_active(struct i2s_dai *i2s)
140 return rx_active(i2s) || other_rx_active(i2s);
143 /* If the other DAI is transmitting or receiving data */
144 static inline bool other_active(struct i2s_dai *i2s)
146 return other_rx_active(i2s) || other_tx_active(i2s);
149 /* If this DAI is transmitting or receiving data */
150 static inline bool this_active(struct i2s_dai *i2s)
152 return tx_active(i2s) || rx_active(i2s);
155 /* If the controller is active anyway */
156 static inline bool any_active(struct i2s_dai *i2s)
158 return this_active(i2s) || other_active(i2s);
161 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
163 return snd_soc_dai_get_drvdata(dai);
166 static inline bool is_opened(struct i2s_dai *i2s)
168 if (i2s && (i2s->mode & DAI_OPENED))
174 static inline bool is_manager(struct i2s_dai *i2s)
176 if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
182 /* Read RCLK of I2S (in multiples of LRCLK) */
183 static inline unsigned get_rfs(struct i2s_dai *i2s)
185 u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
195 /* Write RCLK of I2S (in multiples of LRCLK) */
196 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
198 u32 mod = readl(i2s->addr + I2SMOD);
200 mod &= ~MOD_RCLK_MASK;
204 mod |= MOD_RCLK_768FS;
207 mod |= MOD_RCLK_512FS;
210 mod |= MOD_RCLK_384FS;
213 mod |= MOD_RCLK_256FS;
217 writel(mod, i2s->addr + I2SMOD);
220 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
221 static inline unsigned get_bfs(struct i2s_dai *i2s)
223 u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
233 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
234 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
236 u32 mod = readl(i2s->addr + I2SMOD);
238 mod &= ~MOD_BCLK_MASK;
242 mod |= MOD_BCLK_48FS;
245 mod |= MOD_BCLK_32FS;
248 mod |= MOD_BCLK_24FS;
251 mod |= MOD_BCLK_16FS;
254 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
258 writel(mod, i2s->addr + I2SMOD);
262 static inline int get_blc(struct i2s_dai *i2s)
264 int blc = readl(i2s->addr + I2SMOD);
266 blc = (blc >> 13) & 0x3;
275 /* TX Channel Control */
276 static void i2s_txctrl(struct i2s_dai *i2s, int on)
278 void __iomem *addr = i2s->addr;
279 u32 con = readl(addr + I2SCON);
280 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
284 con &= ~CON_TXCH_PAUSE;
286 if (is_secondary(i2s)) {
287 con |= CON_TXSDMA_ACTIVE;
288 con &= ~CON_TXSDMA_PAUSE;
290 con |= CON_TXDMA_ACTIVE;
291 con &= ~CON_TXDMA_PAUSE;
294 if (any_rx_active(i2s))
299 if (is_secondary(i2s)) {
300 con |= CON_TXSDMA_PAUSE;
301 con &= ~CON_TXSDMA_ACTIVE;
303 con |= CON_TXDMA_PAUSE;
304 con &= ~CON_TXDMA_ACTIVE;
307 if (other_tx_active(i2s)) {
308 writel(con, addr + I2SCON);
312 con |= CON_TXCH_PAUSE;
314 if (any_rx_active(i2s))
320 writel(mod, addr + I2SMOD);
321 writel(con, addr + I2SCON);
324 /* RX Channel Control */
325 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
327 void __iomem *addr = i2s->addr;
328 u32 con = readl(addr + I2SCON);
329 u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
332 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
333 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
335 if (any_tx_active(i2s))
340 con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
341 con &= ~CON_RXDMA_ACTIVE;
343 if (any_tx_active(i2s))
349 writel(mod, addr + I2SMOD);
350 writel(con, addr + I2SCON);
353 /* Flush FIFO of an interface */
354 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
362 if (is_secondary(i2s))
363 fic = i2s->addr + I2SFICS;
365 fic = i2s->addr + I2SFIC;
368 writel(readl(fic) | flush, fic);
371 val = msecs_to_loops(1) / 1000; /* 1 usec */
375 writel(readl(fic) & ~flush, fic);
378 static int i2s_set_sysclk(struct snd_soc_dai *dai,
379 int clk_id, unsigned int rfs, int dir)
381 struct i2s_dai *i2s = to_info(dai);
382 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
383 u32 mod = readl(i2s->addr + I2SMOD);
386 case SAMSUNG_I2S_CDCLK:
387 /* Shouldn't matter in GATING(CLOCK_IN) mode */
388 if (dir == SND_SOC_CLOCK_IN)
391 if ((rfs && other->rfs && (other->rfs != rfs)) ||
393 (((dir == SND_SOC_CLOCK_IN)
394 && !(mod & MOD_CDCLKCON)) ||
395 ((dir == SND_SOC_CLOCK_OUT)
396 && (mod & MOD_CDCLKCON))))) {
397 dev_err(&i2s->pdev->dev,
398 "%s:%d Other DAI busy\n", __func__, __LINE__);
402 if (dir == SND_SOC_CLOCK_IN)
405 mod &= ~MOD_CDCLKCON;
410 case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
411 case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
412 if ((i2s->quirks & QUIRK_NO_MUXPSR)
413 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
418 if (!any_active(i2s)) {
420 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
421 (!clk_id && (mod & MOD_IMS_SYSMUX))) {
422 clk_disable(i2s->op_clk);
423 clk_put(i2s->op_clk);
426 clk_get_rate(i2s->op_clk);
431 i2s->op_clk = clk_get(&i2s->pdev->dev,
432 i2s->src_clk[clk_id]);
433 clk_enable(i2s->op_clk);
434 i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
436 /* Over-ride the other's */
438 other->op_clk = i2s->op_clk;
439 other->rclk_srcrate = i2s->rclk_srcrate;
441 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
442 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
443 dev_err(&i2s->pdev->dev,
444 "%s:%d Other DAI busy\n", __func__, __LINE__);
447 /* Call can't be on the active DAI */
448 i2s->op_clk = other->op_clk;
449 i2s->rclk_srcrate = other->rclk_srcrate;
454 mod &= ~MOD_IMS_SYSMUX;
456 mod |= MOD_IMS_SYSMUX;
460 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
464 writel(mod, i2s->addr + I2SMOD);
469 static int i2s_set_fmt(struct snd_soc_dai *dai,
472 struct i2s_dai *i2s = to_info(dai);
473 u32 mod = readl(i2s->addr + I2SMOD);
476 /* Format is priority */
477 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
478 case SND_SOC_DAIFMT_RIGHT_J:
482 case SND_SOC_DAIFMT_LEFT_J:
486 case SND_SOC_DAIFMT_I2S:
490 dev_err(&i2s->pdev->dev, "Format not supported\n");
495 * INV flag is relative to the FORMAT flag - if set it simply
496 * flips the polarity specified by the Standard
498 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
499 case SND_SOC_DAIFMT_NB_NF:
501 case SND_SOC_DAIFMT_NB_IF:
502 if (tmp & MOD_LR_RLOW)
508 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
512 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
513 case SND_SOC_DAIFMT_CBM_CFM:
516 case SND_SOC_DAIFMT_CBS_CFS:
517 /* Set default source clock in Master mode */
518 if (i2s->rclk_srcrate == 0)
519 i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
520 0, SND_SOC_CLOCK_IN);
523 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
527 if (any_active(i2s) &&
528 ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
529 | MOD_SLAVE)) != tmp)) {
530 dev_err(&i2s->pdev->dev,
531 "%s:%d Other DAI busy\n", __func__, __LINE__);
535 mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
537 writel(mod, i2s->addr + I2SMOD);
542 static int i2s_hw_params(struct snd_pcm_substream *substream,
543 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
545 struct i2s_dai *i2s = to_info(dai);
546 u32 mod = readl(i2s->addr + I2SMOD);
548 if (!is_secondary(i2s))
549 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
551 switch (params_channels(params)) {
560 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
561 params_channels(params));
565 if (is_secondary(i2s))
566 mod &= ~MOD_BLCS_MASK;
568 mod &= ~MOD_BLCP_MASK;
571 mod &= ~MOD_BLC_MASK;
573 switch (params_format(params)) {
574 case SNDRV_PCM_FORMAT_S8:
575 if (is_secondary(i2s))
576 mod |= MOD_BLCS_8BIT;
578 mod |= MOD_BLCP_8BIT;
582 case SNDRV_PCM_FORMAT_S16_LE:
583 if (is_secondary(i2s))
584 mod |= MOD_BLCS_16BIT;
586 mod |= MOD_BLCP_16BIT;
588 mod |= MOD_BLC_16BIT;
590 case SNDRV_PCM_FORMAT_S24_LE:
591 if (is_secondary(i2s))
592 mod |= MOD_BLCS_24BIT;
594 mod |= MOD_BLCP_24BIT;
596 mod |= MOD_BLC_24BIT;
599 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
600 params_format(params));
603 writel(mod, i2s->addr + I2SMOD);
605 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
606 snd_soc_dai_set_dma_data(dai, substream,
607 (void *)&i2s->dma_playback);
609 snd_soc_dai_set_dma_data(dai, substream,
610 (void *)&i2s->dma_capture);
612 i2s->frmclk = params_rate(params);
617 /* We set constraints on the substream acc to the version of I2S */
618 static int i2s_startup(struct snd_pcm_substream *substream,
619 struct snd_soc_dai *dai)
621 struct i2s_dai *i2s = to_info(dai);
622 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
625 spin_lock_irqsave(&lock, flags);
627 i2s->mode |= DAI_OPENED;
629 if (is_manager(other))
630 i2s->mode &= ~DAI_MANAGER;
632 i2s->mode |= DAI_MANAGER;
634 /* Enforce set_sysclk in Master mode */
635 i2s->rclk_srcrate = 0;
637 spin_unlock_irqrestore(&lock, flags);
642 static void i2s_shutdown(struct snd_pcm_substream *substream,
643 struct snd_soc_dai *dai)
645 struct i2s_dai *i2s = to_info(dai);
646 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
649 spin_lock_irqsave(&lock, flags);
651 i2s->mode &= ~DAI_OPENED;
652 i2s->mode &= ~DAI_MANAGER;
654 if (is_opened(other))
655 other->mode |= DAI_MANAGER;
657 /* Reset any constraint on RFS and BFS */
661 spin_unlock_irqrestore(&lock, flags);
663 /* Gate CDCLK by default */
664 if (!is_opened(other))
665 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
666 0, SND_SOC_CLOCK_IN);
669 static int config_setup(struct i2s_dai *i2s)
671 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
672 unsigned rfs, bfs, blc;
682 /* Select least possible multiple(2) if no constraint set */
691 if ((rfs == 256 || rfs == 512) && (blc == 24)) {
692 dev_err(&i2s->pdev->dev,
693 "%d-RFS not supported for 24-blc\n", rfs);
698 if (bfs == 16 || bfs == 32)
704 /* If already setup and running */
705 if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
706 dev_err(&i2s->pdev->dev,
707 "%s:%d Other DAI busy\n", __func__, __LINE__);
711 /* Don't bother RFS, BFS & PSR in Slave mode */
718 if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
719 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
720 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
721 dev_dbg(&i2s->pdev->dev,
722 "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
723 i2s->rclk_srcrate, psr, rfs, bfs);
729 static int i2s_trigger(struct snd_pcm_substream *substream,
730 int cmd, struct snd_soc_dai *dai)
732 int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
733 struct snd_soc_pcm_runtime *rtd = substream->private_data;
734 struct i2s_dai *i2s = to_info(rtd->cpu_dai);
738 case SNDRV_PCM_TRIGGER_START:
739 case SNDRV_PCM_TRIGGER_RESUME:
740 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
741 local_irq_save(flags);
743 if (config_setup(i2s)) {
744 local_irq_restore(flags);
753 local_irq_restore(flags);
755 case SNDRV_PCM_TRIGGER_STOP:
756 case SNDRV_PCM_TRIGGER_SUSPEND:
757 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
758 local_irq_save(flags);
766 i2s_fifo(i2s, FIC_RXFLUSH);
768 i2s_fifo(i2s, FIC_TXFLUSH);
770 local_irq_restore(flags);
777 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
780 struct i2s_dai *i2s = to_info(dai);
781 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
784 case SAMSUNG_I2S_DIV_BCLK:
785 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
786 || (other && other->bfs && (other->bfs != div))) {
787 dev_err(&i2s->pdev->dev,
788 "%s:%d Other DAI busy\n", __func__, __LINE__);
794 dev_err(&i2s->pdev->dev,
795 "Invalid clock divider(%d)\n", div_id);
802 static snd_pcm_sframes_t
803 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
805 struct i2s_dai *i2s = to_info(dai);
806 u32 reg = readl(i2s->addr + I2SFIC);
807 snd_pcm_sframes_t delay;
809 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
810 delay = FIC_RXCOUNT(reg);
811 else if (is_secondary(i2s))
812 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
814 delay = FIC_TXCOUNT(reg);
820 static int i2s_suspend(struct snd_soc_dai *dai)
822 struct i2s_dai *i2s = to_info(dai);
825 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
826 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
827 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
833 static int i2s_resume(struct snd_soc_dai *dai)
835 struct i2s_dai *i2s = to_info(dai);
838 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
839 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
840 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
846 #define i2s_suspend NULL
847 #define i2s_resume NULL
850 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
852 struct i2s_dai *i2s = to_info(dai);
853 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
855 if (other && other->clk) /* If this is probe on secondary */
858 i2s->addr = ioremap(i2s->base, 0x100);
859 if (i2s->addr == NULL) {
860 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
864 i2s->clk = clk_get(&i2s->pdev->dev, "iis");
865 if (IS_ERR(i2s->clk)) {
866 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
870 clk_enable(i2s->clk);
873 other->addr = i2s->addr;
874 other->clk = i2s->clk;
877 if (i2s->quirks & QUIRK_NEED_RSTCLR)
878 writel(CON_RSTCLR, i2s->addr + I2SCON);
881 /* Reset any constraint on RFS and BFS */
886 i2s_fifo(i2s, FIC_TXFLUSH);
887 i2s_fifo(other, FIC_TXFLUSH);
888 i2s_fifo(i2s, FIC_RXFLUSH);
890 /* Gate CDCLK by default */
891 if (!is_opened(other))
892 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
893 0, SND_SOC_CLOCK_IN);
898 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
900 struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
901 struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
903 if (!other || !other->clk) {
905 if (i2s->quirks & QUIRK_NEED_RSTCLR)
906 writel(0, i2s->addr + I2SCON);
908 clk_disable(i2s->clk);
919 static struct snd_soc_dai_ops samsung_i2s_dai_ops = {
920 .trigger = i2s_trigger,
921 .hw_params = i2s_hw_params,
922 .set_fmt = i2s_set_fmt,
923 .set_clkdiv = i2s_set_clkdiv,
924 .set_sysclk = i2s_set_sysclk,
925 .startup = i2s_startup,
926 .shutdown = i2s_shutdown,
930 #define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
932 #define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
933 SNDRV_PCM_FMTBIT_S16_LE | \
934 SNDRV_PCM_FMTBIT_S24_LE)
937 struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
941 i2s = kzalloc(sizeof(struct i2s_dai), GFP_KERNEL);
948 i2s->i2s_dai_drv.symmetric_rates = 1;
949 i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
950 i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
951 i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
952 i2s->i2s_dai_drv.suspend = i2s_suspend;
953 i2s->i2s_dai_drv.resume = i2s_resume;
954 i2s->i2s_dai_drv.playback.channels_min = 2;
955 i2s->i2s_dai_drv.playback.channels_max = 2;
956 i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
957 i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
960 i2s->i2s_dai_drv.capture.channels_min = 2;
961 i2s->i2s_dai_drv.capture.channels_max = 2;
962 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
963 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
964 } else { /* Create a new platform_device for Secondary */
965 i2s->pdev = platform_device_register_resndata(NULL,
966 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
968 if (IS_ERR(i2s->pdev)) {
974 /* Pre-assign snd_soc_dai_set_drvdata */
975 dev_set_drvdata(&i2s->pdev->dev, i2s);
980 static __devinit int samsung_i2s_probe(struct platform_device *pdev)
982 u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
983 struct i2s_dai *pri_dai, *sec_dai = NULL;
984 struct s3c_audio_pdata *i2s_pdata;
985 struct samsung_i2s *i2s_cfg;
986 struct resource *res;
987 u32 regs_base, quirks;
990 /* Call during Seconday interface registration */
991 if (pdev->id >= SAMSUNG_I2S_SECOFF) {
992 sec_dai = dev_get_drvdata(&pdev->dev);
993 snd_soc_register_dai(&sec_dai->pdev->dev,
994 &sec_dai->i2s_dai_drv);
998 i2s_pdata = pdev->dev.platform_data;
999 if (i2s_pdata == NULL) {
1000 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1004 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1006 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
1009 dma_pl_chan = res->start;
1011 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1013 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
1016 dma_cp_chan = res->start;
1018 res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1020 dma_pl_sec_chan = res->start;
1022 dma_pl_sec_chan = 0;
1024 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1026 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1030 if (!request_mem_region(res->start, resource_size(res),
1032 dev_err(&pdev->dev, "Unable to request SFR region\n");
1035 regs_base = res->start;
1037 i2s_cfg = &i2s_pdata->type.i2s;
1038 quirks = i2s_cfg->quirks;
1040 pri_dai = i2s_alloc_dai(pdev, false);
1042 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1047 pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1048 pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1049 pri_dai->dma_playback.client =
1050 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1051 pri_dai->dma_capture.client =
1052 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1053 pri_dai->dma_playback.channel = dma_pl_chan;
1054 pri_dai->dma_capture.channel = dma_cp_chan;
1055 pri_dai->src_clk = i2s_cfg->src_clk;
1056 pri_dai->dma_playback.dma_size = 4;
1057 pri_dai->dma_capture.dma_size = 4;
1058 pri_dai->base = regs_base;
1059 pri_dai->quirks = quirks;
1061 if (quirks & QUIRK_PRI_6CHAN)
1062 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1064 if (quirks & QUIRK_SEC_DAI) {
1065 sec_dai = i2s_alloc_dai(pdev, true);
1067 dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1071 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1072 sec_dai->dma_playback.client =
1073 (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1074 /* Use iDMA always if SysDMA not provided */
1075 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
1076 sec_dai->src_clk = i2s_cfg->src_clk;
1077 sec_dai->dma_playback.dma_size = 4;
1078 sec_dai->base = regs_base;
1079 sec_dai->quirks = quirks;
1080 sec_dai->pri_dai = pri_dai;
1081 pri_dai->sec_dai = sec_dai;
1084 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1085 dev_err(&pdev->dev, "Unable to configure gpio\n");
1090 snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
1098 release_mem_region(regs_base, resource_size(res));
1103 static __devexit int samsung_i2s_remove(struct platform_device *pdev)
1105 struct i2s_dai *i2s, *other;
1107 i2s = dev_get_drvdata(&pdev->dev);
1108 other = i2s->pri_dai ? : i2s->sec_dai;
1111 other->pri_dai = NULL;
1112 other->sec_dai = NULL;
1114 struct resource *res;
1115 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1117 release_mem_region(res->start, resource_size(res));
1120 i2s->pri_dai = NULL;
1121 i2s->sec_dai = NULL;
1125 snd_soc_unregister_dai(&pdev->dev);
1130 static struct platform_driver samsung_i2s_driver = {
1131 .probe = samsung_i2s_probe,
1132 .remove = samsung_i2s_remove,
1134 .name = "samsung-i2s",
1135 .owner = THIS_MODULE,
1139 static int __init samsung_i2s_init(void)
1141 return platform_driver_register(&samsung_i2s_driver);
1143 module_init(samsung_i2s_init);
1145 static void __exit samsung_i2s_exit(void)
1147 platform_driver_unregister(&samsung_i2s_driver);
1149 module_exit(samsung_i2s_exit);
1151 /* Module information */
1152 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
1153 MODULE_DESCRIPTION("Samsung I2S Interface");
1154 MODULE_ALIAS("platform:samsung-i2s");
1155 MODULE_LICENSE("GPL");