2 * Fifo-attached Serial Interface (FSI) support for SH7724
4 * Copyright (C) 2009 Renesas Solutions Corp.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/delay.h>
16 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20 #include <sound/soc.h>
21 #include <sound/sh_fsi.h>
23 /* PortA/PortB register */
24 #define REG_DO_FMT 0x0000
25 #define REG_DOFF_CTL 0x0004
26 #define REG_DOFF_ST 0x0008
27 #define REG_DI_FMT 0x000C
28 #define REG_DIFF_CTL 0x0010
29 #define REG_DIFF_ST 0x0014
30 #define REG_CKG1 0x0018
31 #define REG_CKG2 0x001C
32 #define REG_DIDT 0x0020
33 #define REG_DODT 0x0024
34 #define REG_MUTE_ST 0x0028
35 #define REG_OUT_SEL 0x0030
38 #define MST_CLK_RST 0x0210
39 #define MST_SOFT_RST 0x0214
40 #define MST_FIFO_SZ 0x0218
42 /* core register (depend on FSI version) */
43 #define A_MST_CTLR 0x0180
44 #define B_MST_CTLR 0x01A0
45 #define CPU_INT_ST 0x01F4
46 #define CPU_IEMSK 0x01F8
47 #define CPU_IMSK 0x01FC
54 #define CR_BWS_24 (0x0 << 20) /* FSI2 */
55 #define CR_BWS_16 (0x1 << 20) /* FSI2 */
56 #define CR_BWS_20 (0x2 << 20) /* FSI2 */
58 #define CR_DTMD_PCM (0x0 << 8) /* FSI2 */
59 #define CR_DTMD_SPDIF_PCM (0x1 << 8) /* FSI2 */
60 #define CR_DTMD_SPDIF_STREAM (0x2 << 8) /* FSI2 */
62 #define CR_MONO (0x0 << 4)
63 #define CR_MONO_D (0x1 << 4)
64 #define CR_PCM (0x2 << 4)
65 #define CR_I2S (0x3 << 4)
66 #define CR_TDM (0x4 << 4)
67 #define CR_TDM_D (0x5 << 4)
71 #define IRQ_HALF 0x00100000
72 #define FIFO_CLR 0x00000001
75 #define ERR_OVER 0x00000010
76 #define ERR_UNDER 0x00000001
77 #define ST_ERR (ERR_OVER | ERR_UNDER)
80 #define ACKMD_MASK 0x00007000
81 #define BPFMD_MASK 0x00000700
86 #define BP (1 << 4) /* Fix the signal of Biphase output */
87 #define SE (1 << 0) /* Fix the master clock */
93 /* IO SHIFT / MACRO */
98 #define AB_IO(param, shift) (param << shift)
101 #define PBSR (1 << 12) /* Port B Software Reset */
102 #define PASR (1 << 8) /* Port A Software Reset */
103 #define IR (1 << 4) /* Interrupt Reset */
104 #define FSISR (1 << 0) /* Software Reset */
107 #define DMMD (1 << 4) /* SPDIF output timing 0: Biphase only */
108 /* 1: Biphase and serial */
111 #define FIFO_SZ_MASK 0x7
113 #define FSI_RATES SNDRV_PCM_RATE_8000_96000
115 #define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
117 typedef int (*set_rate_func)(struct device *dev, int is_porta, int rate, int enable);
120 * FSI driver use below type name for variable
122 * xxx_num : number of data
123 * xxx_pos : position of data
124 * xxx_capa : capacity of data
128 * period/frame/sample image
132 * period pos period pos
134 * |<-------------------- period--------------------->|
135 * ==|============================================ ... =|==
137 * ||<----- frame ----->|<------ frame ----->| ... |
138 * |+--------------------+--------------------+- ... |
139 * ||[ sample ][ sample ]|[ sample ][ sample ]| ... |
140 * |+--------------------+--------------------+- ... |
141 * ==|============================================ ... =|==
161 struct snd_pcm_substream *substream;
163 int fifo_sample_capa; /* sample capacity of FSI FIFO */
164 int buff_sample_capa; /* sample capacity of ALSA buffer */
165 int buff_sample_pos; /* sample position of ALSA buffer */
166 int period_samples; /* sample number / 1 period */
167 int period_pos; /* current period position */
175 struct fsi_master *master;
177 struct fsi_stream playback;
178 struct fsi_stream capture;
203 struct fsi_priv fsia;
204 struct fsi_priv fsib;
205 struct fsi_core *core;
206 struct sh_fsi_platform_info *info;
211 * basic read write function
214 static void __fsi_reg_write(u32 __iomem *reg, u32 data)
216 /* valid data area is 24bit */
219 __raw_writel(data, reg);
222 static u32 __fsi_reg_read(u32 __iomem *reg)
224 return __raw_readl(reg);
227 static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
229 u32 val = __fsi_reg_read(reg);
234 __fsi_reg_write(reg, val);
237 #define fsi_reg_write(p, r, d)\
238 __fsi_reg_write((u32)(p->base + REG_##r), d)
240 #define fsi_reg_read(p, r)\
241 __fsi_reg_read((u32)(p->base + REG_##r))
243 #define fsi_reg_mask_set(p, r, m, d)\
244 __fsi_reg_mask_set((u32)(p->base + REG_##r), m, d)
246 #define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
247 #define fsi_core_read(p, r) _fsi_master_read(p, p->core->r)
248 static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
253 spin_lock_irqsave(&master->lock, flags);
254 ret = __fsi_reg_read(master->base + reg);
255 spin_unlock_irqrestore(&master->lock, flags);
260 #define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
261 #define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d)
262 static void _fsi_master_mask_set(struct fsi_master *master,
263 u32 reg, u32 mask, u32 data)
267 spin_lock_irqsave(&master->lock, flags);
268 __fsi_reg_mask_set(master->base + reg, mask, data);
269 spin_unlock_irqrestore(&master->lock, flags);
276 static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
281 static int fsi_is_clk_master(struct fsi_priv *fsi)
283 return fsi->clk_master;
286 static int fsi_is_port_a(struct fsi_priv *fsi)
288 return fsi->master->base == fsi->base;
291 static int fsi_is_spdif(struct fsi_priv *fsi)
296 static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
298 struct snd_soc_pcm_runtime *rtd = substream->private_data;
303 static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
305 struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
308 return &master->fsia;
310 return &master->fsib;
313 static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
315 return fsi_get_priv_frm_dai(fsi_get_dai(substream));
318 static set_rate_func fsi_get_info_set_rate(struct fsi_master *master)
323 return master->info->set_rate;
326 static u32 fsi_get_info_flags(struct fsi_priv *fsi)
328 int is_porta = fsi_is_port_a(fsi);
329 struct fsi_master *master = fsi_get_master(fsi);
334 return is_porta ? master->info->porta_flags :
335 master->info->portb_flags;
338 static inline int fsi_stream_is_play(int stream)
340 return stream == SNDRV_PCM_STREAM_PLAYBACK;
343 static inline int fsi_is_play(struct snd_pcm_substream *substream)
345 return fsi_stream_is_play(substream->stream);
348 static inline struct fsi_stream *fsi_get_stream(struct fsi_priv *fsi,
351 return is_play ? &fsi->playback : &fsi->capture;
354 static u32 fsi_get_port_shift(struct fsi_priv *fsi, int is_play)
356 int is_porta = fsi_is_port_a(fsi);
360 shift = is_play ? AO_SHIFT : AI_SHIFT;
362 shift = is_play ? BO_SHIFT : BI_SHIFT;
367 static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
369 return frames * fsi->chan_num;
372 static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
374 return samples / fsi->chan_num;
377 static int fsi_stream_is_working(struct fsi_priv *fsi,
380 struct fsi_stream *io = fsi_get_stream(fsi, is_play);
381 struct fsi_master *master = fsi_get_master(fsi);
385 spin_lock_irqsave(&master->lock, flags);
386 ret = !!io->substream;
387 spin_unlock_irqrestore(&master->lock, flags);
392 static void fsi_stream_push(struct fsi_priv *fsi,
394 struct snd_pcm_substream *substream)
396 struct fsi_stream *io = fsi_get_stream(fsi, is_play);
397 struct snd_pcm_runtime *runtime = substream->runtime;
398 struct fsi_master *master = fsi_get_master(fsi);
401 spin_lock_irqsave(&master->lock, flags);
402 io->substream = substream;
403 io->buff_sample_capa = fsi_frame2sample(fsi, runtime->buffer_size);
404 io->buff_sample_pos = 0;
405 io->period_samples = fsi_frame2sample(fsi, runtime->period_size);
407 io->oerr_num = -1; /* ignore 1st err */
408 io->uerr_num = -1; /* ignore 1st err */
409 spin_unlock_irqrestore(&master->lock, flags);
412 static void fsi_stream_pop(struct fsi_priv *fsi, int is_play)
414 struct fsi_stream *io = fsi_get_stream(fsi, is_play);
415 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
416 struct fsi_master *master = fsi_get_master(fsi);
419 spin_lock_irqsave(&master->lock, flags);
421 if (io->oerr_num > 0)
422 dev_err(dai->dev, "over_run = %d\n", io->oerr_num);
424 if (io->uerr_num > 0)
425 dev_err(dai->dev, "under_run = %d\n", io->uerr_num);
427 io->substream = NULL;
428 io->buff_sample_capa = 0;
429 io->buff_sample_pos = 0;
430 io->period_samples = 0;
434 spin_unlock_irqrestore(&master->lock, flags);
437 static int fsi_get_current_fifo_samples(struct fsi_priv *fsi, int is_play)
443 fsi_reg_read(fsi, DOFF_ST) :
444 fsi_reg_read(fsi, DIFF_ST);
446 frames = 0x1ff & (status >> 8);
448 return fsi_frame2sample(fsi, frames);
451 static void fsi_count_fifo_err(struct fsi_priv *fsi)
453 u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
454 u32 istatus = fsi_reg_read(fsi, DIFF_ST);
456 if (ostatus & ERR_OVER)
457 fsi->playback.oerr_num++;
459 if (ostatus & ERR_UNDER)
460 fsi->playback.uerr_num++;
462 if (istatus & ERR_OVER)
463 fsi->capture.oerr_num++;
465 if (istatus & ERR_UNDER)
466 fsi->capture.uerr_num++;
468 fsi_reg_write(fsi, DOFF_ST, 0);
469 fsi_reg_write(fsi, DIFF_ST, 0);
476 static u8 *fsi_dma_get_area(struct fsi_priv *fsi, int stream)
478 int is_play = fsi_stream_is_play(stream);
479 struct fsi_stream *io = fsi_get_stream(fsi, is_play);
480 struct snd_pcm_runtime *runtime = io->substream->runtime;
482 return runtime->dma_area +
483 samples_to_bytes(runtime, io->buff_sample_pos);
486 static void fsi_dma_soft_push16(struct fsi_priv *fsi, int num)
491 start = (u16 *)fsi_dma_get_area(fsi, SNDRV_PCM_STREAM_PLAYBACK);
493 for (i = 0; i < num; i++)
494 fsi_reg_write(fsi, DODT, ((u32)*(start + i) << 8));
497 static void fsi_dma_soft_pop16(struct fsi_priv *fsi, int num)
502 start = (u16 *)fsi_dma_get_area(fsi, SNDRV_PCM_STREAM_CAPTURE);
505 for (i = 0; i < num; i++)
506 *(start + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
509 static void fsi_dma_soft_push32(struct fsi_priv *fsi, int num)
514 start = (u32 *)fsi_dma_get_area(fsi, SNDRV_PCM_STREAM_PLAYBACK);
517 for (i = 0; i < num; i++)
518 fsi_reg_write(fsi, DODT, *(start + i));
521 static void fsi_dma_soft_pop32(struct fsi_priv *fsi, int num)
526 start = (u32 *)fsi_dma_get_area(fsi, SNDRV_PCM_STREAM_CAPTURE);
528 for (i = 0; i < num; i++)
529 *(start + i) = fsi_reg_read(fsi, DIDT);
536 static void fsi_irq_enable(struct fsi_priv *fsi, int is_play)
538 u32 data = AB_IO(1, fsi_get_port_shift(fsi, is_play));
539 struct fsi_master *master = fsi_get_master(fsi);
541 fsi_core_mask_set(master, imsk, data, data);
542 fsi_core_mask_set(master, iemsk, data, data);
545 static void fsi_irq_disable(struct fsi_priv *fsi, int is_play)
547 u32 data = AB_IO(1, fsi_get_port_shift(fsi, is_play));
548 struct fsi_master *master = fsi_get_master(fsi);
550 fsi_core_mask_set(master, imsk, data, 0);
551 fsi_core_mask_set(master, iemsk, data, 0);
554 static u32 fsi_irq_get_status(struct fsi_master *master)
556 return fsi_core_read(master, int_st);
559 static void fsi_irq_clear_status(struct fsi_priv *fsi)
562 struct fsi_master *master = fsi_get_master(fsi);
564 data |= AB_IO(1, fsi_get_port_shift(fsi, 0));
565 data |= AB_IO(1, fsi_get_port_shift(fsi, 1));
567 /* clear interrupt factor */
568 fsi_core_mask_set(master, int_st, data, 0);
572 * SPDIF master clock function
574 * These functions are used later FSI2
576 static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
578 struct fsi_master *master = fsi_get_master(fsi);
581 if (master->core->ver < 2) {
582 pr_err("fsi: register access err (%s)\n", __func__);
587 val = enable ? mask : 0;
590 fsi_core_mask_set(master, a_mclk, mask, val) :
591 fsi_core_mask_set(master, b_mclk, mask, val);
597 static int fsi_set_master_clk(struct device *dev, struct fsi_priv *fsi,
598 long rate, int enable)
600 struct fsi_master *master = fsi_get_master(fsi);
601 set_rate_func set_rate = fsi_get_info_set_rate(master);
602 int fsi_ver = master->core->ver;
605 ret = set_rate(dev, fsi_is_port_a(fsi), rate, enable);
606 if (ret < 0) /* error */
615 switch (ret & SH_FSI_ACKMD_MASK) {
618 case SH_FSI_ACKMD_512:
621 case SH_FSI_ACKMD_256:
624 case SH_FSI_ACKMD_128:
627 case SH_FSI_ACKMD_64:
630 case SH_FSI_ACKMD_32:
632 dev_err(dev, "unsupported ACKMD\n");
638 switch (ret & SH_FSI_BPFMD_MASK) {
641 case SH_FSI_BPFMD_32:
644 case SH_FSI_BPFMD_64:
647 case SH_FSI_BPFMD_128:
650 case SH_FSI_BPFMD_256:
653 case SH_FSI_BPFMD_512:
656 case SH_FSI_BPFMD_16:
658 dev_err(dev, "unsupported ACKMD\n");
664 fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
672 #define fsi_port_start(f, i) __fsi_port_clk_ctrl(f, i, 1)
673 #define fsi_port_stop(f, i) __fsi_port_clk_ctrl(f, i, 0)
674 static void __fsi_port_clk_ctrl(struct fsi_priv *fsi, int is_play, int enable)
676 struct fsi_master *master = fsi_get_master(fsi);
677 u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
680 fsi_irq_enable(fsi, is_play);
682 fsi_irq_disable(fsi, is_play);
684 if (fsi_is_clk_master(fsi))
685 fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
691 static void fsi_fifo_init(struct fsi_priv *fsi,
695 struct fsi_master *master = fsi_get_master(fsi);
696 struct fsi_stream *io = fsi_get_stream(fsi, is_play);
700 /* get on-chip RAM capacity */
701 shift = fsi_master_read(master, FIFO_SZ);
702 shift >>= fsi_get_port_shift(fsi, is_play);
703 shift &= FIFO_SZ_MASK;
704 frame_capa = 256 << shift;
705 dev_dbg(dev, "fifo = %d words\n", frame_capa);
708 * The maximum number of sample data varies depending
709 * on the number of channels selected for the format.
711 * FIFOs are used in 4-channel units in 3-channel mode
712 * and in 8-channel units in 5- to 7-channel mode
713 * meaning that more FIFOs than the required size of DPRAM
716 * ex) if 256 words of DP-RAM is connected
717 * 1 channel: 256 (256 x 1 = 256)
718 * 2 channels: 128 (128 x 2 = 256)
719 * 3 channels: 64 ( 64 x 3 = 192)
720 * 4 channels: 64 ( 64 x 4 = 256)
721 * 5 channels: 32 ( 32 x 5 = 160)
722 * 6 channels: 32 ( 32 x 6 = 192)
723 * 7 channels: 32 ( 32 x 7 = 224)
724 * 8 channels: 32 ( 32 x 8 = 256)
726 for (i = 1; i < fsi->chan_num; i <<= 1)
728 dev_dbg(dev, "%d channel %d store\n",
729 fsi->chan_num, frame_capa);
731 io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa);
734 * set interrupt generation factor
738 fsi_reg_write(fsi, DOFF_CTL, IRQ_HALF);
739 fsi_reg_mask_set(fsi, DOFF_CTL, FIFO_CLR, FIFO_CLR);
741 fsi_reg_write(fsi, DIFF_CTL, IRQ_HALF);
742 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
746 static int fsi_fifo_data_ctrl(struct fsi_priv *fsi, int stream)
748 struct snd_pcm_runtime *runtime;
749 struct snd_pcm_substream *substream = NULL;
750 int is_play = fsi_stream_is_play(stream);
751 struct fsi_stream *io = fsi_get_stream(fsi, is_play);
757 void (*fn)(struct fsi_priv *fsi, int size);
761 !io->substream->runtime)
765 substream = io->substream;
766 runtime = substream->runtime;
768 /* FSI FIFO has limit.
769 * So, this driver can not send periods data at a time
771 if (io->buff_sample_pos >=
772 io->period_samples * (io->period_pos + 1)) {
775 io->period_pos = (io->period_pos + 1) % runtime->periods;
777 if (0 == io->period_pos)
778 io->buff_sample_pos = 0;
781 /* get 1 sample data width */
782 sample_width = samples_to_bytes(runtime, 1);
784 /* get number of residue samples */
785 sample_residues = io->buff_sample_capa - io->buff_sample_pos;
791 * samples_max : number of FSI fifo free samples space
792 * samples : number of ALSA residue samples
794 samples_max = io->fifo_sample_capa;
795 samples_max -= fsi_get_current_fifo_samples(fsi, is_play);
797 samples = sample_residues;
799 switch (sample_width) {
801 fn = fsi_dma_soft_push16;
804 fn = fsi_dma_soft_push32;
813 * samples_max : number of ALSA free samples space
814 * samples : number of samples in FSI fifo
816 samples_max = sample_residues;
817 samples = fsi_get_current_fifo_samples(fsi, is_play);
819 switch (sample_width) {
821 fn = fsi_dma_soft_pop16;
824 fn = fsi_dma_soft_pop32;
831 samples = min(samples, samples_max);
835 /* update buff_sample_pos */
836 io->buff_sample_pos += samples;
839 snd_pcm_period_elapsed(substream);
844 static int fsi_data_pop(struct fsi_priv *fsi)
846 return fsi_fifo_data_ctrl(fsi, SNDRV_PCM_STREAM_CAPTURE);
849 static int fsi_data_push(struct fsi_priv *fsi)
851 return fsi_fifo_data_ctrl(fsi, SNDRV_PCM_STREAM_PLAYBACK);
854 static irqreturn_t fsi_interrupt(int irq, void *data)
856 struct fsi_master *master = data;
857 u32 int_st = fsi_irq_get_status(master);
859 /* clear irq status */
860 fsi_master_mask_set(master, SOFT_RST, IR, 0);
861 fsi_master_mask_set(master, SOFT_RST, IR, IR);
863 if (int_st & AB_IO(1, AO_SHIFT))
864 fsi_data_push(&master->fsia);
865 if (int_st & AB_IO(1, BO_SHIFT))
866 fsi_data_push(&master->fsib);
867 if (int_st & AB_IO(1, AI_SHIFT))
868 fsi_data_pop(&master->fsia);
869 if (int_st & AB_IO(1, BI_SHIFT))
870 fsi_data_pop(&master->fsib);
872 fsi_count_fifo_err(&master->fsia);
873 fsi_count_fifo_err(&master->fsib);
875 fsi_irq_clear_status(&master->fsia);
876 fsi_irq_clear_status(&master->fsib);
885 static int fsi_hw_startup(struct fsi_priv *fsi,
889 u32 flags = fsi_get_info_flags(fsi);
892 pm_runtime_get_sync(dev);
895 if (fsi_is_clk_master(fsi))
898 fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data);
900 /* clock inversion (CKG2) */
902 if (SH_FSI_LRM_INV & flags)
904 if (SH_FSI_BRM_INV & flags)
906 if (SH_FSI_LRS_INV & flags)
908 if (SH_FSI_BRS_INV & flags)
911 fsi_reg_write(fsi, CKG2, data);
914 fsi_reg_write(fsi, DO_FMT, fsi->do_fmt);
915 fsi_reg_write(fsi, DI_FMT, fsi->di_fmt);
918 if (fsi_is_spdif(fsi)) {
919 fsi_spdif_clk_ctrl(fsi, 1);
920 fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
924 fsi_irq_disable(fsi, is_play);
925 fsi_irq_clear_status(fsi);
928 fsi_fifo_init(fsi, is_play, dev);
933 static void fsi_hw_shutdown(struct fsi_priv *fsi,
937 if (fsi_is_clk_master(fsi))
938 fsi_set_master_clk(dev, fsi, fsi->rate, 0);
940 pm_runtime_put_sync(dev);
943 static int fsi_dai_startup(struct snd_pcm_substream *substream,
944 struct snd_soc_dai *dai)
946 struct fsi_priv *fsi = fsi_get_priv(substream);
947 int is_play = fsi_is_play(substream);
949 return fsi_hw_startup(fsi, is_play, dai->dev);
952 static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
953 struct snd_soc_dai *dai)
955 struct fsi_priv *fsi = fsi_get_priv(substream);
956 int is_play = fsi_is_play(substream);
958 fsi_hw_shutdown(fsi, is_play, dai->dev);
962 static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
963 struct snd_soc_dai *dai)
965 struct fsi_priv *fsi = fsi_get_priv(substream);
966 int is_play = fsi_is_play(substream);
970 case SNDRV_PCM_TRIGGER_START:
971 fsi_stream_push(fsi, is_play, substream);
972 ret = is_play ? fsi_data_push(fsi) : fsi_data_pop(fsi);
973 fsi_port_start(fsi, is_play);
975 case SNDRV_PCM_TRIGGER_STOP:
976 fsi_port_stop(fsi, is_play);
977 fsi_stream_pop(fsi, is_play);
984 static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt)
988 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
989 case SND_SOC_DAIFMT_I2S:
993 case SND_SOC_DAIFMT_LEFT_J:
1007 static int fsi_set_fmt_spdif(struct fsi_priv *fsi)
1009 struct fsi_master *master = fsi_get_master(fsi);
1012 if (master->core->ver < 2)
1015 data = CR_BWS_16 | CR_DTMD_SPDIF_PCM | CR_PCM;
1025 static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1027 struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai);
1028 struct fsi_master *master = fsi_get_master(fsi);
1029 set_rate_func set_rate = fsi_get_info_set_rate(master);
1030 u32 flags = fsi_get_info_flags(fsi);
1033 /* set master/slave audio interface */
1034 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1035 case SND_SOC_DAIFMT_CBM_CFM:
1036 fsi->clk_master = 1;
1038 case SND_SOC_DAIFMT_CBS_CFS:
1044 if (fsi_is_clk_master(fsi) && !set_rate) {
1045 dev_err(dai->dev, "platform doesn't have set_rate\n");
1050 switch (flags & SH_FSI_FMT_MASK) {
1051 case SH_FSI_FMT_DAI:
1052 ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1054 case SH_FSI_FMT_SPDIF:
1055 ret = fsi_set_fmt_spdif(fsi);
1064 static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
1065 struct snd_pcm_hw_params *params,
1066 struct snd_soc_dai *dai)
1068 struct fsi_priv *fsi = fsi_get_priv(substream);
1069 long rate = params_rate(params);
1072 if (!fsi_is_clk_master(fsi))
1075 ret = fsi_set_master_clk(dai->dev, fsi, rate, 1);
1084 static struct snd_soc_dai_ops fsi_dai_ops = {
1085 .startup = fsi_dai_startup,
1086 .shutdown = fsi_dai_shutdown,
1087 .trigger = fsi_dai_trigger,
1088 .set_fmt = fsi_dai_set_fmt,
1089 .hw_params = fsi_dai_hw_params,
1096 static struct snd_pcm_hardware fsi_pcm_hardware = {
1097 .info = SNDRV_PCM_INFO_INTERLEAVED |
1098 SNDRV_PCM_INFO_MMAP |
1099 SNDRV_PCM_INFO_MMAP_VALID |
1100 SNDRV_PCM_INFO_PAUSE,
1101 .formats = FSI_FMTS,
1107 .buffer_bytes_max = 64 * 1024,
1108 .period_bytes_min = 32,
1109 .period_bytes_max = 8192,
1115 static int fsi_pcm_open(struct snd_pcm_substream *substream)
1117 struct snd_pcm_runtime *runtime = substream->runtime;
1120 snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware);
1122 ret = snd_pcm_hw_constraint_integer(runtime,
1123 SNDRV_PCM_HW_PARAM_PERIODS);
1128 static int fsi_hw_params(struct snd_pcm_substream *substream,
1129 struct snd_pcm_hw_params *hw_params)
1131 return snd_pcm_lib_malloc_pages(substream,
1132 params_buffer_bytes(hw_params));
1135 static int fsi_hw_free(struct snd_pcm_substream *substream)
1137 return snd_pcm_lib_free_pages(substream);
1140 static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
1142 struct fsi_priv *fsi = fsi_get_priv(substream);
1143 struct fsi_stream *io = fsi_get_stream(fsi, fsi_is_play(substream));
1144 int samples_pos = io->buff_sample_pos - 1;
1146 if (samples_pos < 0)
1149 return fsi_sample2frame(fsi, samples_pos);
1152 static struct snd_pcm_ops fsi_pcm_ops = {
1153 .open = fsi_pcm_open,
1154 .ioctl = snd_pcm_lib_ioctl,
1155 .hw_params = fsi_hw_params,
1156 .hw_free = fsi_hw_free,
1157 .pointer = fsi_pointer,
1164 #define PREALLOC_BUFFER (32 * 1024)
1165 #define PREALLOC_BUFFER_MAX (32 * 1024)
1167 static void fsi_pcm_free(struct snd_pcm *pcm)
1169 snd_pcm_lib_preallocate_free_for_all(pcm);
1172 static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd)
1174 struct snd_pcm *pcm = rtd->pcm;
1177 * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
1178 * in MMAP mode (i.e. aplay -M)
1180 return snd_pcm_lib_preallocate_pages_for_all(
1182 SNDRV_DMA_TYPE_CONTINUOUS,
1183 snd_dma_continuous_data(GFP_KERNEL),
1184 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1191 static struct snd_soc_dai_driver fsi_soc_dai[] = {
1196 .formats = FSI_FMTS,
1202 .formats = FSI_FMTS,
1206 .ops = &fsi_dai_ops,
1212 .formats = FSI_FMTS,
1218 .formats = FSI_FMTS,
1222 .ops = &fsi_dai_ops,
1226 static struct snd_soc_platform_driver fsi_soc_platform = {
1227 .ops = &fsi_pcm_ops,
1228 .pcm_new = fsi_pcm_new,
1229 .pcm_free = fsi_pcm_free,
1236 static int fsi_probe(struct platform_device *pdev)
1238 struct fsi_master *master;
1239 const struct platform_device_id *id_entry;
1240 struct resource *res;
1244 id_entry = pdev->id_entry;
1246 dev_err(&pdev->dev, "unknown fsi device\n");
1250 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1251 irq = platform_get_irq(pdev, 0);
1252 if (!res || (int)irq <= 0) {
1253 dev_err(&pdev->dev, "Not enough FSI platform resources.\n");
1258 master = kzalloc(sizeof(*master), GFP_KERNEL);
1260 dev_err(&pdev->dev, "Could not allocate master\n");
1265 master->base = ioremap_nocache(res->start, resource_size(res));
1266 if (!master->base) {
1268 dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n");
1272 /* master setting */
1274 master->info = pdev->dev.platform_data;
1275 master->core = (struct fsi_core *)id_entry->driver_data;
1276 spin_lock_init(&master->lock);
1279 master->fsia.base = master->base;
1280 master->fsia.master = master;
1283 master->fsib.base = master->base + 0x40;
1284 master->fsib.master = master;
1286 pm_runtime_enable(&pdev->dev);
1287 dev_set_drvdata(&pdev->dev, master);
1289 ret = request_irq(irq, &fsi_interrupt, 0,
1290 id_entry->name, master);
1292 dev_err(&pdev->dev, "irq request err\n");
1296 ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform);
1298 dev_err(&pdev->dev, "cannot snd soc register\n");
1302 ret = snd_soc_register_dais(&pdev->dev, fsi_soc_dai,
1303 ARRAY_SIZE(fsi_soc_dai));
1305 dev_err(&pdev->dev, "cannot snd dai register\n");
1312 snd_soc_unregister_platform(&pdev->dev);
1314 free_irq(irq, master);
1316 iounmap(master->base);
1317 pm_runtime_disable(&pdev->dev);
1325 static int fsi_remove(struct platform_device *pdev)
1327 struct fsi_master *master;
1329 master = dev_get_drvdata(&pdev->dev);
1331 free_irq(master->irq, master);
1332 pm_runtime_disable(&pdev->dev);
1334 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(fsi_soc_dai));
1335 snd_soc_unregister_platform(&pdev->dev);
1337 iounmap(master->base);
1343 static void __fsi_suspend(struct fsi_priv *fsi,
1347 if (!fsi_stream_is_working(fsi, is_play))
1350 fsi_port_stop(fsi, is_play);
1351 fsi_hw_shutdown(fsi, is_play, dev);
1354 static void __fsi_resume(struct fsi_priv *fsi,
1358 if (!fsi_stream_is_working(fsi, is_play))
1361 fsi_hw_startup(fsi, is_play, dev);
1363 if (fsi_is_clk_master(fsi) && fsi->rate)
1364 fsi_set_master_clk(dev, fsi, fsi->rate, 1);
1366 fsi_port_start(fsi, is_play);
1370 static int fsi_suspend(struct device *dev)
1372 struct fsi_master *master = dev_get_drvdata(dev);
1373 struct fsi_priv *fsia = &master->fsia;
1374 struct fsi_priv *fsib = &master->fsib;
1376 __fsi_suspend(fsia, 1, dev);
1377 __fsi_suspend(fsia, 0, dev);
1379 __fsi_suspend(fsib, 1, dev);
1380 __fsi_suspend(fsib, 0, dev);
1385 static int fsi_resume(struct device *dev)
1387 struct fsi_master *master = dev_get_drvdata(dev);
1388 struct fsi_priv *fsia = &master->fsia;
1389 struct fsi_priv *fsib = &master->fsib;
1391 __fsi_resume(fsia, 1, dev);
1392 __fsi_resume(fsia, 0, dev);
1394 __fsi_resume(fsib, 1, dev);
1395 __fsi_resume(fsib, 0, dev);
1400 static int fsi_runtime_nop(struct device *dev)
1402 /* Runtime PM callback shared between ->runtime_suspend()
1403 * and ->runtime_resume(). Simply returns success.
1405 * This driver re-initializes all registers after
1406 * pm_runtime_get_sync() anyway so there is no need
1407 * to save and restore registers here.
1412 static struct dev_pm_ops fsi_pm_ops = {
1413 .suspend = fsi_suspend,
1414 .resume = fsi_resume,
1415 .runtime_suspend = fsi_runtime_nop,
1416 .runtime_resume = fsi_runtime_nop,
1419 static struct fsi_core fsi1_core = {
1428 static struct fsi_core fsi2_core = {
1432 .int_st = CPU_INT_ST,
1435 .a_mclk = A_MST_CTLR,
1436 .b_mclk = B_MST_CTLR,
1439 static struct platform_device_id fsi_id_table[] = {
1440 { "sh_fsi", (kernel_ulong_t)&fsi1_core },
1441 { "sh_fsi2", (kernel_ulong_t)&fsi2_core },
1444 MODULE_DEVICE_TABLE(platform, fsi_id_table);
1446 static struct platform_driver fsi_driver = {
1448 .name = "fsi-pcm-audio",
1452 .remove = fsi_remove,
1453 .id_table = fsi_id_table,
1456 static int __init fsi_mobile_init(void)
1458 return platform_driver_register(&fsi_driver);
1461 static void __exit fsi_mobile_exit(void)
1463 platform_driver_unregister(&fsi_driver);
1466 module_init(fsi_mobile_init);
1467 module_exit(fsi_mobile_exit);
1469 MODULE_LICENSE("GPL");
1470 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
1472 MODULE_ALIAS("platform:fsi-pcm-audio");