2 * Fifo-attached Serial Interface (FSI) support for SH7724
4 * Copyright (C) 2009 Renesas Solutions Corp.
5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
8 * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
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 <sound/soc.h>
20 #include <sound/sh_fsi.h>
23 #define DOFF_CTL 0x0004
24 #define DOFF_ST 0x0008
26 #define DIFF_CTL 0x0010
27 #define DIFF_ST 0x0014
32 #define MUTE_ST 0x0028
33 #define OUT_SEL 0x0030
34 #define REG_END OUT_SEL
36 #define A_MST_CTLR 0x0180
37 #define B_MST_CTLR 0x01A0
38 #define CPU_INT_ST 0x01F4
39 #define CPU_IEMSK 0x01F8
40 #define CPU_IMSK 0x01FC
45 #define CLK_RST 0x0210
46 #define SOFT_RST 0x0214
47 #define FIFO_SZ 0x0218
48 #define MREG_START A_MST_CTLR
49 #define MREG_END FIFO_SZ
53 #define CR_MONO (0x0 << 4)
54 #define CR_MONO_D (0x1 << 4)
55 #define CR_PCM (0x2 << 4)
56 #define CR_I2S (0x3 << 4)
57 #define CR_TDM (0x4 << 4)
58 #define CR_TDM_D (0x5 << 4)
59 #define CR_SPDIF 0x00100120
63 #define IRQ_HALF 0x00100000
64 #define FIFO_CLR 0x00000001
67 #define ERR_OVER 0x00000010
68 #define ERR_UNDER 0x00000001
69 #define ST_ERR (ERR_OVER | ERR_UNDER)
72 #define ACKMD_MASK 0x00007000
73 #define BPFMD_MASK 0x00000700
76 #define BP (1 << 4) /* Fix the signal of Biphase output */
77 #define SE (1 << 0) /* Fix the master clock */
80 #define B_CLK 0x00000010
81 #define A_CLK 0x00000001
83 /* IO SHIFT / MACRO */
88 #define AB_IO(param, shift) (param << shift)
91 #define PBSR (1 << 12) /* Port B Software Reset */
92 #define PASR (1 << 8) /* Port A Software Reset */
93 #define IR (1 << 4) /* Interrupt Reset */
94 #define FSISR (1 << 0) /* Software Reset */
97 #define FIFO_SZ_MASK 0x7
99 #define FSI_RATES SNDRV_PCM_RATE_8000_96000
101 #define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
104 * FSI driver use below type name for variable
106 * xxx_len : data length
107 * xxx_width : data width
108 * xxx_offset : data offset
109 * xxx_num : number of data
117 struct snd_pcm_substream
*substream
;
130 struct fsi_master
*master
;
132 struct fsi_stream playback
;
133 struct fsi_stream capture
;
151 struct fsi_priv fsia
;
152 struct fsi_priv fsib
;
153 struct fsi_core
*core
;
154 struct sh_fsi_platform_info
*info
;
159 * basic read write function
162 static void __fsi_reg_write(u32 reg
, u32 data
)
164 /* valid data area is 24bit */
167 __raw_writel(data
, reg
);
170 static u32
__fsi_reg_read(u32 reg
)
172 return __raw_readl(reg
);
175 static void __fsi_reg_mask_set(u32 reg
, u32 mask
, u32 data
)
177 u32 val
= __fsi_reg_read(reg
);
182 __fsi_reg_write(reg
, val
);
185 static void fsi_reg_write(struct fsi_priv
*fsi
, u32 reg
, u32 data
)
188 pr_err("fsi: register access err (%s)\n", __func__
);
192 __fsi_reg_write((u32
)(fsi
->base
+ reg
), data
);
195 static u32
fsi_reg_read(struct fsi_priv
*fsi
, u32 reg
)
198 pr_err("fsi: register access err (%s)\n", __func__
);
202 return __fsi_reg_read((u32
)(fsi
->base
+ reg
));
205 static void fsi_reg_mask_set(struct fsi_priv
*fsi
, u32 reg
, u32 mask
, u32 data
)
208 pr_err("fsi: register access err (%s)\n", __func__
);
212 __fsi_reg_mask_set((u32
)(fsi
->base
+ reg
), mask
, data
);
215 static void fsi_master_write(struct fsi_master
*master
, u32 reg
, u32 data
)
219 if ((reg
< MREG_START
) ||
221 pr_err("fsi: register access err (%s)\n", __func__
);
225 spin_lock_irqsave(&master
->lock
, flags
);
226 __fsi_reg_write((u32
)(master
->base
+ reg
), data
);
227 spin_unlock_irqrestore(&master
->lock
, flags
);
230 static u32
fsi_master_read(struct fsi_master
*master
, u32 reg
)
235 if ((reg
< MREG_START
) ||
237 pr_err("fsi: register access err (%s)\n", __func__
);
241 spin_lock_irqsave(&master
->lock
, flags
);
242 ret
= __fsi_reg_read((u32
)(master
->base
+ reg
));
243 spin_unlock_irqrestore(&master
->lock
, flags
);
248 static void fsi_master_mask_set(struct fsi_master
*master
,
249 u32 reg
, u32 mask
, u32 data
)
253 if ((reg
< MREG_START
) ||
255 pr_err("fsi: register access err (%s)\n", __func__
);
259 spin_lock_irqsave(&master
->lock
, flags
);
260 __fsi_reg_mask_set((u32
)(master
->base
+ reg
), mask
, data
);
261 spin_unlock_irqrestore(&master
->lock
, flags
);
268 static struct fsi_master
*fsi_get_master(struct fsi_priv
*fsi
)
273 static int fsi_is_port_a(struct fsi_priv
*fsi
)
275 return fsi
->master
->base
== fsi
->base
;
278 static struct snd_soc_dai
*fsi_get_dai(struct snd_pcm_substream
*substream
)
280 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
285 static struct fsi_priv
*fsi_get_priv(struct snd_pcm_substream
*substream
)
287 struct snd_soc_dai
*dai
= fsi_get_dai(substream
);
288 struct fsi_master
*master
= snd_soc_dai_get_drvdata(dai
);
291 return &master
->fsia
;
293 return &master
->fsib
;
296 static u32
fsi_get_info_flags(struct fsi_priv
*fsi
)
298 int is_porta
= fsi_is_port_a(fsi
);
299 struct fsi_master
*master
= fsi_get_master(fsi
);
301 return is_porta
? master
->info
->porta_flags
:
302 master
->info
->portb_flags
;
305 static inline int fsi_stream_is_play(int stream
)
307 return stream
== SNDRV_PCM_STREAM_PLAYBACK
;
310 static inline int fsi_is_play(struct snd_pcm_substream
*substream
)
312 return fsi_stream_is_play(substream
->stream
);
315 static inline struct fsi_stream
*fsi_get_stream(struct fsi_priv
*fsi
,
318 return is_play
? &fsi
->playback
: &fsi
->capture
;
321 static int fsi_is_master_mode(struct fsi_priv
*fsi
, int is_play
)
324 u32 flags
= fsi_get_info_flags(fsi
);
326 mode
= is_play
? SH_FSI_OUT_SLAVE_MODE
: SH_FSI_IN_SLAVE_MODE
;
333 return (mode
& flags
) != mode
;
336 static u32
fsi_get_port_shift(struct fsi_priv
*fsi
, int is_play
)
338 int is_porta
= fsi_is_port_a(fsi
);
342 shift
= is_play
? AO_SHIFT
: AI_SHIFT
;
344 shift
= is_play
? BO_SHIFT
: BI_SHIFT
;
349 static void fsi_stream_push(struct fsi_priv
*fsi
,
351 struct snd_pcm_substream
*substream
,
355 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
357 io
->substream
= substream
;
358 io
->buff_len
= buffer_len
;
360 io
->period_len
= period_len
;
364 static void fsi_stream_pop(struct fsi_priv
*fsi
, int is_play
)
366 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
368 io
->substream
= NULL
;
375 static int fsi_get_fifo_data_num(struct fsi_priv
*fsi
, int is_play
)
378 u32 reg
= is_play
? DOFF_ST
: DIFF_ST
;
379 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
382 status
= fsi_reg_read(fsi
, reg
);
383 data_num
= 0x1ff & (status
>> 8);
384 data_num
*= io
->chan_num
;
389 static int fsi_len2num(int len
, int width
)
394 #define fsi_num2offset(a, b) fsi_num2len(a, b)
395 static int fsi_num2len(int num
, int width
)
400 static int fsi_get_frame_width(struct fsi_priv
*fsi
, int is_play
)
402 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
403 struct snd_pcm_substream
*substream
= io
->substream
;
404 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
406 return frames_to_bytes(runtime
, 1) / io
->chan_num
;
413 static u8
*fsi_dma_get_area(struct fsi_priv
*fsi
, int stream
)
415 int is_play
= fsi_stream_is_play(stream
);
416 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
418 return io
->substream
->runtime
->dma_area
+ io
->buff_offset
;
421 static void fsi_dma_soft_push16(struct fsi_priv
*fsi
, int num
)
426 start
= (u16
*)fsi_dma_get_area(fsi
, SNDRV_PCM_STREAM_PLAYBACK
);
428 for (i
= 0; i
< num
; i
++)
429 fsi_reg_write(fsi
, DODT
, ((u32
)*(start
+ i
) << 8));
432 static void fsi_dma_soft_pop16(struct fsi_priv
*fsi
, int num
)
437 start
= (u16
*)fsi_dma_get_area(fsi
, SNDRV_PCM_STREAM_CAPTURE
);
440 for (i
= 0; i
< num
; i
++)
441 *(start
+ i
) = (u16
)(fsi_reg_read(fsi
, DIDT
) >> 8);
444 static void fsi_dma_soft_push32(struct fsi_priv
*fsi
, int num
)
449 start
= (u32
*)fsi_dma_get_area(fsi
, SNDRV_PCM_STREAM_PLAYBACK
);
452 for (i
= 0; i
< num
; i
++)
453 fsi_reg_write(fsi
, DODT
, *(start
+ i
));
456 static void fsi_dma_soft_pop32(struct fsi_priv
*fsi
, int num
)
461 start
= (u32
*)fsi_dma_get_area(fsi
, SNDRV_PCM_STREAM_CAPTURE
);
463 for (i
= 0; i
< num
; i
++)
464 *(start
+ i
) = fsi_reg_read(fsi
, DIDT
);
471 static void fsi_irq_enable(struct fsi_priv
*fsi
, int is_play
)
473 u32 data
= AB_IO(1, fsi_get_port_shift(fsi
, is_play
));
474 struct fsi_master
*master
= fsi_get_master(fsi
);
476 fsi_master_mask_set(master
, master
->core
->imsk
, data
, data
);
477 fsi_master_mask_set(master
, master
->core
->iemsk
, data
, data
);
480 static void fsi_irq_disable(struct fsi_priv
*fsi
, int is_play
)
482 u32 data
= AB_IO(1, fsi_get_port_shift(fsi
, is_play
));
483 struct fsi_master
*master
= fsi_get_master(fsi
);
485 fsi_master_mask_set(master
, master
->core
->imsk
, data
, 0);
486 fsi_master_mask_set(master
, master
->core
->iemsk
, data
, 0);
489 static u32
fsi_irq_get_status(struct fsi_master
*master
)
491 return fsi_master_read(master
, master
->core
->int_st
);
494 static void fsi_irq_clear_all_status(struct fsi_master
*master
)
496 fsi_master_write(master
, master
->core
->int_st
, 0);
499 static void fsi_irq_clear_status(struct fsi_priv
*fsi
)
502 struct fsi_master
*master
= fsi_get_master(fsi
);
504 data
|= AB_IO(1, fsi_get_port_shift(fsi
, 0));
505 data
|= AB_IO(1, fsi_get_port_shift(fsi
, 1));
507 /* clear interrupt factor */
508 fsi_master_mask_set(master
, master
->core
->int_st
, data
, 0);
512 * SPDIF master clock function
514 * These functions are used later FSI2
516 static void fsi_spdif_clk_ctrl(struct fsi_priv
*fsi
, int enable
)
518 struct fsi_master
*master
= fsi_get_master(fsi
);
521 if (master
->core
->ver
< 2) {
522 pr_err("fsi: register access err (%s)\n", __func__
);
527 fsi_master_mask_set(master
, fsi
->mst_ctrl
, val
, val
);
529 fsi_master_mask_set(master
, fsi
->mst_ctrl
, val
, 0);
536 static void fsi_clk_ctrl(struct fsi_priv
*fsi
, int enable
)
538 u32 val
= fsi_is_port_a(fsi
) ? (1 << 0) : (1 << 4);
539 struct fsi_master
*master
= fsi_get_master(fsi
);
542 fsi_master_mask_set(master
, CLK_RST
, val
, val
);
544 fsi_master_mask_set(master
, CLK_RST
, val
, 0);
547 static void fsi_fifo_init(struct fsi_priv
*fsi
,
549 struct snd_soc_dai
*dai
)
551 struct fsi_master
*master
= fsi_get_master(fsi
);
552 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
555 /* get on-chip RAM capacity */
556 shift
= fsi_master_read(master
, FIFO_SZ
);
557 shift
>>= fsi_get_port_shift(fsi
, is_play
);
558 shift
&= FIFO_SZ_MASK
;
559 io
->fifo_max_num
= 256 << shift
;
560 dev_dbg(dai
->dev
, "fifo = %d words\n", io
->fifo_max_num
);
563 * The maximum number of sample data varies depending
564 * on the number of channels selected for the format.
566 * FIFOs are used in 4-channel units in 3-channel mode
567 * and in 8-channel units in 5- to 7-channel mode
568 * meaning that more FIFOs than the required size of DPRAM
571 * ex) if 256 words of DP-RAM is connected
572 * 1 channel: 256 (256 x 1 = 256)
573 * 2 channels: 128 (128 x 2 = 256)
574 * 3 channels: 64 ( 64 x 3 = 192)
575 * 4 channels: 64 ( 64 x 4 = 256)
576 * 5 channels: 32 ( 32 x 5 = 160)
577 * 6 channels: 32 ( 32 x 6 = 192)
578 * 7 channels: 32 ( 32 x 7 = 224)
579 * 8 channels: 32 ( 32 x 8 = 256)
581 for (i
= 1; i
< io
->chan_num
; i
<<= 1)
582 io
->fifo_max_num
>>= 1;
583 dev_dbg(dai
->dev
, "%d channel %d store\n",
584 io
->chan_num
, io
->fifo_max_num
);
586 ctrl
= is_play
? DOFF_CTL
: DIFF_CTL
;
588 /* set interrupt generation factor */
589 fsi_reg_write(fsi
, ctrl
, IRQ_HALF
);
592 fsi_reg_mask_set(fsi
, ctrl
, FIFO_CLR
, FIFO_CLR
);
595 static void fsi_soft_all_reset(struct fsi_master
*master
)
598 fsi_master_mask_set(master
, SOFT_RST
, PASR
| PBSR
, 0);
602 fsi_master_mask_set(master
, SOFT_RST
, FSISR
, 0);
603 fsi_master_mask_set(master
, SOFT_RST
, FSISR
, FSISR
);
607 static int fsi_fifo_data_ctrl(struct fsi_priv
*fsi
, int startup
, int stream
)
609 struct snd_pcm_runtime
*runtime
;
610 struct snd_pcm_substream
*substream
= NULL
;
611 int is_play
= fsi_stream_is_play(stream
);
612 struct fsi_stream
*io
= fsi_get_stream(fsi
, is_play
);
613 u32 status_reg
= is_play
? DOFF_ST
: DIFF_ST
;
614 int data_residue_num
;
619 void (*fn
)(struct fsi_priv
*fsi
, int size
);
623 !io
->substream
->runtime
)
627 substream
= io
->substream
;
628 runtime
= substream
->runtime
;
630 /* FSI FIFO has limit.
631 * So, this driver can not send periods data at a time
633 if (io
->buff_offset
>=
634 fsi_num2offset(io
->period_num
+ 1, io
->period_len
)) {
637 io
->period_num
= (io
->period_num
+ 1) % runtime
->periods
;
639 if (0 == io
->period_num
)
643 /* get 1 channel data width */
644 ch_width
= fsi_get_frame_width(fsi
, is_play
);
646 /* get residue data number of alsa */
647 data_residue_num
= fsi_len2num(io
->buff_len
- io
->buff_offset
,
654 * data_num_max : number of FSI fifo free space
655 * data_num : number of ALSA residue data
657 data_num_max
= io
->fifo_max_num
* io
->chan_num
;
658 data_num_max
-= fsi_get_fifo_data_num(fsi
, is_play
);
660 data_num
= data_residue_num
;
664 fn
= fsi_dma_soft_push16
;
667 fn
= fsi_dma_soft_push32
;
676 * data_num_max : number of ALSA free space
677 * data_num : number of data in FSI fifo
679 data_num_max
= data_residue_num
;
680 data_num
= fsi_get_fifo_data_num(fsi
, is_play
);
684 fn
= fsi_dma_soft_pop16
;
687 fn
= fsi_dma_soft_pop32
;
694 data_num
= min(data_num
, data_num_max
);
698 /* update buff_offset */
699 io
->buff_offset
+= fsi_num2offset(data_num
, ch_width
);
701 /* check fifo status */
703 struct snd_soc_dai
*dai
= fsi_get_dai(substream
);
704 u32 status
= fsi_reg_read(fsi
, status_reg
);
706 if (status
& ERR_OVER
)
707 dev_err(dai
->dev
, "over run\n");
708 if (status
& ERR_UNDER
)
709 dev_err(dai
->dev
, "under run\n");
711 fsi_reg_write(fsi
, status_reg
, 0);
714 fsi_irq_enable(fsi
, is_play
);
717 snd_pcm_period_elapsed(substream
);
722 static int fsi_data_pop(struct fsi_priv
*fsi
, int startup
)
724 return fsi_fifo_data_ctrl(fsi
, startup
, SNDRV_PCM_STREAM_CAPTURE
);
727 static int fsi_data_push(struct fsi_priv
*fsi
, int startup
)
729 return fsi_fifo_data_ctrl(fsi
, startup
, SNDRV_PCM_STREAM_PLAYBACK
);
732 static irqreturn_t
fsi_interrupt(int irq
, void *data
)
734 struct fsi_master
*master
= data
;
735 u32 int_st
= fsi_irq_get_status(master
);
737 /* clear irq status */
738 fsi_master_mask_set(master
, SOFT_RST
, IR
, 0);
739 fsi_master_mask_set(master
, SOFT_RST
, IR
, IR
);
741 if (int_st
& AB_IO(1, AO_SHIFT
))
742 fsi_data_push(&master
->fsia
, 0);
743 if (int_st
& AB_IO(1, BO_SHIFT
))
744 fsi_data_push(&master
->fsib
, 0);
745 if (int_st
& AB_IO(1, AI_SHIFT
))
746 fsi_data_pop(&master
->fsia
, 0);
747 if (int_st
& AB_IO(1, BI_SHIFT
))
748 fsi_data_pop(&master
->fsib
, 0);
750 fsi_irq_clear_all_status(master
);
759 static int fsi_dai_startup(struct snd_pcm_substream
*substream
,
760 struct snd_soc_dai
*dai
)
762 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
763 struct fsi_master
*master
= fsi_get_master(fsi
);
764 struct fsi_stream
*io
;
765 u32 flags
= fsi_get_info_flags(fsi
);
769 int is_play
= fsi_is_play(substream
);
772 io
= fsi_get_stream(fsi
, is_play
);
774 pm_runtime_get_sync(dai
->dev
);
777 data
= is_play
? (1 << 0) : (1 << 4);
778 is_master
= fsi_is_master_mode(fsi
, is_play
);
780 fsi_reg_mask_set(fsi
, CKG1
, data
, data
);
782 fsi_reg_mask_set(fsi
, CKG1
, data
, 0);
784 /* clock inversion (CKG2) */
786 if (SH_FSI_LRM_INV
& flags
)
788 if (SH_FSI_BRM_INV
& flags
)
790 if (SH_FSI_LRS_INV
& flags
)
792 if (SH_FSI_BRS_INV
& flags
)
795 fsi_reg_write(fsi
, CKG2
, data
);
799 reg
= is_play
? DO_FMT
: DI_FMT
;
800 fmt
= is_play
? SH_FSI_GET_OFMT(flags
) : SH_FSI_GET_IFMT(flags
);
802 case SH_FSI_FMT_MONO
:
806 case SH_FSI_FMT_MONO_DELAY
:
819 io
->chan_num
= is_play
?
820 SH_FSI_GET_CH_O(flags
) : SH_FSI_GET_CH_I(flags
);
821 data
= CR_TDM
| (io
->chan_num
- 1);
823 case SH_FSI_FMT_TDM_DELAY
:
824 io
->chan_num
= is_play
?
825 SH_FSI_GET_CH_O(flags
) : SH_FSI_GET_CH_I(flags
);
826 data
= CR_TDM_D
| (io
->chan_num
- 1);
828 case SH_FSI_FMT_SPDIF
:
829 if (master
->core
->ver
< 2) {
830 dev_err(dai
->dev
, "This FSI can not use SPDIF\n");
835 fsi_spdif_clk_ctrl(fsi
, 1);
836 fsi_reg_mask_set(fsi
, OUT_SEL
, 0x0010, 0x0010);
839 dev_err(dai
->dev
, "unknown format.\n");
842 fsi_reg_write(fsi
, reg
, data
);
845 fsi_irq_disable(fsi
, is_play
);
846 fsi_irq_clear_status(fsi
);
849 fsi_fifo_init(fsi
, is_play
, dai
);
854 static void fsi_dai_shutdown(struct snd_pcm_substream
*substream
,
855 struct snd_soc_dai
*dai
)
857 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
858 int is_play
= fsi_is_play(substream
);
859 struct fsi_master
*master
= fsi_get_master(fsi
);
860 int (*set_rate
)(struct device
*dev
, int is_porta
, int rate
, int enable
);
862 fsi_irq_disable(fsi
, is_play
);
863 fsi_clk_ctrl(fsi
, 0);
865 set_rate
= master
->info
->set_rate
;
866 if (set_rate
&& fsi
->rate
)
867 set_rate(dai
->dev
, fsi_is_port_a(fsi
), fsi
->rate
, 0);
870 pm_runtime_put_sync(dai
->dev
);
873 static int fsi_dai_trigger(struct snd_pcm_substream
*substream
, int cmd
,
874 struct snd_soc_dai
*dai
)
876 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
877 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
878 int is_play
= fsi_is_play(substream
);
882 case SNDRV_PCM_TRIGGER_START
:
883 fsi_stream_push(fsi
, is_play
, substream
,
884 frames_to_bytes(runtime
, runtime
->buffer_size
),
885 frames_to_bytes(runtime
, runtime
->period_size
));
886 ret
= is_play
? fsi_data_push(fsi
, 1) : fsi_data_pop(fsi
, 1);
888 case SNDRV_PCM_TRIGGER_STOP
:
889 fsi_irq_disable(fsi
, is_play
);
890 fsi_stream_pop(fsi
, is_play
);
897 static int fsi_dai_hw_params(struct snd_pcm_substream
*substream
,
898 struct snd_pcm_hw_params
*params
,
899 struct snd_soc_dai
*dai
)
901 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
902 struct fsi_master
*master
= fsi_get_master(fsi
);
903 int (*set_rate
)(struct device
*dev
, int is_porta
, int rate
, int enable
);
904 int fsi_ver
= master
->core
->ver
;
905 long rate
= params_rate(params
);
908 set_rate
= master
->info
->set_rate
;
912 ret
= set_rate(dai
->dev
, fsi_is_port_a(fsi
), rate
, 1);
913 if (ret
< 0) /* error */
920 switch (ret
& SH_FSI_ACKMD_MASK
) {
923 case SH_FSI_ACKMD_512
:
926 case SH_FSI_ACKMD_256
:
929 case SH_FSI_ACKMD_128
:
932 case SH_FSI_ACKMD_64
:
935 case SH_FSI_ACKMD_32
:
937 dev_err(dai
->dev
, "unsupported ACKMD\n");
943 switch (ret
& SH_FSI_BPFMD_MASK
) {
946 case SH_FSI_BPFMD_32
:
949 case SH_FSI_BPFMD_64
:
952 case SH_FSI_BPFMD_128
:
955 case SH_FSI_BPFMD_256
:
958 case SH_FSI_BPFMD_512
:
961 case SH_FSI_BPFMD_16
:
963 dev_err(dai
->dev
, "unsupported ACKMD\n");
969 fsi_reg_mask_set(fsi
, CKG1
, (ACKMD_MASK
| BPFMD_MASK
) , data
);
971 fsi_clk_ctrl(fsi
, 1);
979 static struct snd_soc_dai_ops fsi_dai_ops
= {
980 .startup
= fsi_dai_startup
,
981 .shutdown
= fsi_dai_shutdown
,
982 .trigger
= fsi_dai_trigger
,
983 .hw_params
= fsi_dai_hw_params
,
990 static struct snd_pcm_hardware fsi_pcm_hardware
= {
991 .info
= SNDRV_PCM_INFO_INTERLEAVED
|
992 SNDRV_PCM_INFO_MMAP
|
993 SNDRV_PCM_INFO_MMAP_VALID
|
994 SNDRV_PCM_INFO_PAUSE
,
1001 .buffer_bytes_max
= 64 * 1024,
1002 .period_bytes_min
= 32,
1003 .period_bytes_max
= 8192,
1009 static int fsi_pcm_open(struct snd_pcm_substream
*substream
)
1011 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1014 snd_soc_set_runtime_hwparams(substream
, &fsi_pcm_hardware
);
1016 ret
= snd_pcm_hw_constraint_integer(runtime
,
1017 SNDRV_PCM_HW_PARAM_PERIODS
);
1022 static int fsi_hw_params(struct snd_pcm_substream
*substream
,
1023 struct snd_pcm_hw_params
*hw_params
)
1025 return snd_pcm_lib_malloc_pages(substream
,
1026 params_buffer_bytes(hw_params
));
1029 static int fsi_hw_free(struct snd_pcm_substream
*substream
)
1031 return snd_pcm_lib_free_pages(substream
);
1034 static snd_pcm_uframes_t
fsi_pointer(struct snd_pcm_substream
*substream
)
1036 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1037 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
1038 struct fsi_stream
*io
= fsi_get_stream(fsi
, fsi_is_play(substream
));
1041 location
= (io
->buff_offset
- 1);
1045 return bytes_to_frames(runtime
, location
);
1048 static struct snd_pcm_ops fsi_pcm_ops
= {
1049 .open
= fsi_pcm_open
,
1050 .ioctl
= snd_pcm_lib_ioctl
,
1051 .hw_params
= fsi_hw_params
,
1052 .hw_free
= fsi_hw_free
,
1053 .pointer
= fsi_pointer
,
1060 #define PREALLOC_BUFFER (32 * 1024)
1061 #define PREALLOC_BUFFER_MAX (32 * 1024)
1063 static void fsi_pcm_free(struct snd_pcm
*pcm
)
1065 snd_pcm_lib_preallocate_free_for_all(pcm
);
1068 static int fsi_pcm_new(struct snd_card
*card
,
1069 struct snd_soc_dai
*dai
,
1070 struct snd_pcm
*pcm
)
1073 * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
1074 * in MMAP mode (i.e. aplay -M)
1076 return snd_pcm_lib_preallocate_pages_for_all(
1078 SNDRV_DMA_TYPE_CONTINUOUS
,
1079 snd_dma_continuous_data(GFP_KERNEL
),
1080 PREALLOC_BUFFER
, PREALLOC_BUFFER_MAX
);
1087 static struct snd_soc_dai_driver fsi_soc_dai
[] = {
1092 .formats
= FSI_FMTS
,
1098 .formats
= FSI_FMTS
,
1102 .ops
= &fsi_dai_ops
,
1108 .formats
= FSI_FMTS
,
1114 .formats
= FSI_FMTS
,
1118 .ops
= &fsi_dai_ops
,
1122 static struct snd_soc_platform_driver fsi_soc_platform
= {
1123 .ops
= &fsi_pcm_ops
,
1124 .pcm_new
= fsi_pcm_new
,
1125 .pcm_free
= fsi_pcm_free
,
1132 static int fsi_probe(struct platform_device
*pdev
)
1134 struct fsi_master
*master
;
1135 const struct platform_device_id
*id_entry
;
1136 struct resource
*res
;
1140 id_entry
= pdev
->id_entry
;
1142 dev_err(&pdev
->dev
, "unknown fsi device\n");
1146 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1147 irq
= platform_get_irq(pdev
, 0);
1148 if (!res
|| (int)irq
<= 0) {
1149 dev_err(&pdev
->dev
, "Not enough FSI platform resources.\n");
1154 master
= kzalloc(sizeof(*master
), GFP_KERNEL
);
1156 dev_err(&pdev
->dev
, "Could not allocate master\n");
1161 master
->base
= ioremap_nocache(res
->start
, resource_size(res
));
1162 if (!master
->base
) {
1164 dev_err(&pdev
->dev
, "Unable to ioremap FSI registers.\n");
1168 /* master setting */
1170 master
->info
= pdev
->dev
.platform_data
;
1171 master
->core
= (struct fsi_core
*)id_entry
->driver_data
;
1172 spin_lock_init(&master
->lock
);
1175 master
->fsia
.base
= master
->base
;
1176 master
->fsia
.master
= master
;
1177 master
->fsia
.mst_ctrl
= A_MST_CTLR
;
1180 master
->fsib
.base
= master
->base
+ 0x40;
1181 master
->fsib
.master
= master
;
1182 master
->fsib
.mst_ctrl
= B_MST_CTLR
;
1184 pm_runtime_enable(&pdev
->dev
);
1185 pm_runtime_resume(&pdev
->dev
);
1186 dev_set_drvdata(&pdev
->dev
, master
);
1188 fsi_soft_all_reset(master
);
1190 ret
= request_irq(irq
, &fsi_interrupt
, IRQF_DISABLED
,
1191 id_entry
->name
, master
);
1193 dev_err(&pdev
->dev
, "irq request err\n");
1197 ret
= snd_soc_register_platform(&pdev
->dev
, &fsi_soc_platform
);
1199 dev_err(&pdev
->dev
, "cannot snd soc register\n");
1203 return snd_soc_register_dais(&pdev
->dev
, fsi_soc_dai
, ARRAY_SIZE(fsi_soc_dai
));
1206 free_irq(irq
, master
);
1208 iounmap(master
->base
);
1209 pm_runtime_disable(&pdev
->dev
);
1217 static int fsi_remove(struct platform_device
*pdev
)
1219 struct fsi_master
*master
;
1221 master
= dev_get_drvdata(&pdev
->dev
);
1223 snd_soc_unregister_dais(&pdev
->dev
, ARRAY_SIZE(fsi_soc_dai
));
1224 snd_soc_unregister_platform(&pdev
->dev
);
1226 pm_runtime_disable(&pdev
->dev
);
1228 free_irq(master
->irq
, master
);
1230 iounmap(master
->base
);
1236 static int fsi_runtime_nop(struct device
*dev
)
1238 /* Runtime PM callback shared between ->runtime_suspend()
1239 * and ->runtime_resume(). Simply returns success.
1241 * This driver re-initializes all registers after
1242 * pm_runtime_get_sync() anyway so there is no need
1243 * to save and restore registers here.
1248 static struct dev_pm_ops fsi_pm_ops
= {
1249 .runtime_suspend
= fsi_runtime_nop
,
1250 .runtime_resume
= fsi_runtime_nop
,
1253 static struct fsi_core fsi1_core
= {
1262 static struct fsi_core fsi2_core
= {
1266 .int_st
= CPU_INT_ST
,
1271 static struct platform_device_id fsi_id_table
[] = {
1272 { "sh_fsi", (kernel_ulong_t
)&fsi1_core
},
1273 { "sh_fsi2", (kernel_ulong_t
)&fsi2_core
},
1276 MODULE_DEVICE_TABLE(platform
, fsi_id_table
);
1278 static struct platform_driver fsi_driver
= {
1280 .name
= "fsi-pcm-audio",
1284 .remove
= fsi_remove
,
1285 .id_table
= fsi_id_table
,
1288 static int __init
fsi_mobile_init(void)
1290 return platform_driver_register(&fsi_driver
);
1293 static void __exit
fsi_mobile_exit(void)
1295 platform_driver_unregister(&fsi_driver
);
1298 module_init(fsi_mobile_init
);
1299 module_exit(fsi_mobile_exit
);
1301 MODULE_LICENSE("GPL");
1302 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
1303 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");