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/init.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/delay.h>
19 #include <linux/list.h>
20 #include <linux/pm_runtime.h>
22 #include <linux/slab.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/initval.h>
26 #include <sound/soc.h>
27 #include <sound/pcm_params.h>
28 #include <sound/sh_fsi.h>
29 #include <asm/atomic.h>
32 #define DOFF_CTL 0x0004
33 #define DOFF_ST 0x0008
35 #define DIFF_CTL 0x0010
36 #define DIFF_ST 0x0014
41 #define MUTE_ST 0x0028
42 #define REG_END MUTE_ST
48 #define CLK_RST 0x0210
49 #define SOFT_RST 0x0214
50 #define MREG_START INT_ST
51 #define MREG_END SOFT_RST
55 #define CR_FMT(param) ((param) << 4)
57 # define CR_MONO_D 0x1
65 #define IRQ_HALF 0x00100000
66 #define FIFO_CLR 0x00000001
69 #define ERR_OVER 0x00000010
70 #define ERR_UNDER 0x00000001
71 #define ST_ERR (ERR_OVER | ERR_UNDER)
74 #define B_CLK 0x00000010
75 #define A_CLK 0x00000001
78 #define INT_B_IN (1 << 12)
79 #define INT_B_OUT (1 << 8)
80 #define INT_A_IN (1 << 4)
81 #define INT_A_OUT (1 << 0)
83 #define FSI_RATES SNDRV_PCM_RATE_8000_96000
85 #define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
87 /************************************************************************
93 ************************************************************************/
96 struct snd_pcm_substream
*substream
;
97 struct fsi_master
*master
;
111 struct fsi_priv fsia
;
112 struct fsi_priv fsib
;
113 struct sh_fsi_platform_info
*info
;
117 /************************************************************************
120 basic read write function
123 ************************************************************************/
124 static void __fsi_reg_write(u32 reg
, u32 data
)
126 /* valid data area is 24bit */
129 __raw_writel(data
, reg
);
132 static u32
__fsi_reg_read(u32 reg
)
134 return __raw_readl(reg
);
137 static void __fsi_reg_mask_set(u32 reg
, u32 mask
, u32 data
)
139 u32 val
= __fsi_reg_read(reg
);
144 __fsi_reg_write(reg
, val
);
147 static void fsi_reg_write(struct fsi_priv
*fsi
, u32 reg
, u32 data
)
152 __fsi_reg_write((u32
)(fsi
->base
+ reg
), data
);
155 static u32
fsi_reg_read(struct fsi_priv
*fsi
, u32 reg
)
160 return __fsi_reg_read((u32
)(fsi
->base
+ reg
));
163 static void fsi_reg_mask_set(struct fsi_priv
*fsi
, u32 reg
, u32 mask
, u32 data
)
168 __fsi_reg_mask_set((u32
)(fsi
->base
+ reg
), mask
, data
);
171 static void fsi_master_write(struct fsi_master
*master
, u32 reg
, u32 data
)
175 if ((reg
< MREG_START
) ||
179 spin_lock_irqsave(&master
->lock
, flags
);
180 __fsi_reg_write((u32
)(master
->base
+ reg
), data
);
181 spin_unlock_irqrestore(&master
->lock
, flags
);
184 static u32
fsi_master_read(struct fsi_master
*master
, u32 reg
)
189 if ((reg
< MREG_START
) ||
193 spin_lock_irqsave(&master
->lock
, flags
);
194 ret
= __fsi_reg_read((u32
)(master
->base
+ reg
));
195 spin_unlock_irqrestore(&master
->lock
, flags
);
200 static void fsi_master_mask_set(struct fsi_master
*master
,
201 u32 reg
, u32 mask
, u32 data
)
205 if ((reg
< MREG_START
) ||
209 spin_lock_irqsave(&master
->lock
, flags
);
210 __fsi_reg_mask_set((u32
)(master
->base
+ reg
), mask
, data
);
211 spin_unlock_irqrestore(&master
->lock
, flags
);
214 /************************************************************************
220 ************************************************************************/
221 static struct fsi_master
*fsi_get_master(struct fsi_priv
*fsi
)
226 static int fsi_is_port_a(struct fsi_priv
*fsi
)
228 return fsi
->master
->base
== fsi
->base
;
231 static struct snd_soc_dai
*fsi_get_dai(struct snd_pcm_substream
*substream
)
233 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
234 struct snd_soc_dai_link
*machine
= rtd
->dai
;
236 return machine
->cpu_dai
;
239 static struct fsi_priv
*fsi_get_priv(struct snd_pcm_substream
*substream
)
241 struct snd_soc_dai
*dai
= fsi_get_dai(substream
);
243 return dai
->private_data
;
246 static u32
fsi_get_info_flags(struct fsi_priv
*fsi
)
248 int is_porta
= fsi_is_port_a(fsi
);
249 struct fsi_master
*master
= fsi_get_master(fsi
);
251 return is_porta
? master
->info
->porta_flags
:
252 master
->info
->portb_flags
;
255 static int fsi_is_master_mode(struct fsi_priv
*fsi
, int is_play
)
258 u32 flags
= fsi_get_info_flags(fsi
);
260 mode
= is_play
? SH_FSI_OUT_SLAVE_MODE
: SH_FSI_IN_SLAVE_MODE
;
267 return (mode
& flags
) != mode
;
270 static u32
fsi_port_ab_io_bit(struct fsi_priv
*fsi
, int is_play
)
272 int is_porta
= fsi_is_port_a(fsi
);
276 data
= is_play
? (1 << 0) : (1 << 4);
278 data
= is_play
? (1 << 8) : (1 << 12);
283 static void fsi_stream_push(struct fsi_priv
*fsi
,
284 struct snd_pcm_substream
*substream
,
288 fsi
->substream
= substream
;
289 fsi
->buffer_len
= buffer_len
;
290 fsi
->period_len
= period_len
;
291 fsi
->byte_offset
= 0;
295 static void fsi_stream_pop(struct fsi_priv
*fsi
)
297 fsi
->substream
= NULL
;
300 fsi
->byte_offset
= 0;
304 static int fsi_get_fifo_residue(struct fsi_priv
*fsi
, int is_play
)
307 u32 reg
= is_play
? DOFF_ST
: DIFF_ST
;
310 status
= fsi_reg_read(fsi
, reg
);
311 residue
= 0x1ff & (status
>> 8);
312 residue
*= fsi
->chan
;
317 /************************************************************************
323 ************************************************************************/
324 static void fsi_irq_enable(struct fsi_priv
*fsi
, int is_play
)
326 u32 data
= fsi_port_ab_io_bit(fsi
, is_play
);
327 struct fsi_master
*master
= fsi_get_master(fsi
);
329 fsi_master_mask_set(master
, IMSK
, data
, data
);
330 fsi_master_mask_set(master
, IEMSK
, data
, data
);
333 static void fsi_irq_disable(struct fsi_priv
*fsi
, int is_play
)
335 u32 data
= fsi_port_ab_io_bit(fsi
, is_play
);
336 struct fsi_master
*master
= fsi_get_master(fsi
);
338 fsi_master_mask_set(master
, IMSK
, data
, 0);
339 fsi_master_mask_set(master
, IEMSK
, data
, 0);
342 static void fsi_clk_ctrl(struct fsi_priv
*fsi
, int enable
)
344 u32 val
= fsi_is_port_a(fsi
) ? (1 << 0) : (1 << 4);
345 struct fsi_master
*master
= fsi_get_master(fsi
);
348 fsi_master_mask_set(master
, CLK_RST
, val
, val
);
350 fsi_master_mask_set(master
, CLK_RST
, val
, 0);
353 static void fsi_irq_init(struct fsi_priv
*fsi
, int is_play
)
358 data
= fsi_port_ab_io_bit(fsi
, is_play
);
359 ctrl
= is_play
? DOFF_CTL
: DIFF_CTL
;
362 fsi_irq_disable(fsi
, is_play
);
364 /* set interrupt generation factor */
365 fsi_reg_write(fsi
, ctrl
, IRQ_HALF
);
368 fsi_reg_mask_set(fsi
, ctrl
, FIFO_CLR
, FIFO_CLR
);
370 /* clear interrupt factor */
371 fsi_master_mask_set(fsi_get_master(fsi
), INT_ST
, data
, 0);
374 static void fsi_soft_all_reset(struct fsi_master
*master
)
376 u32 status
= fsi_master_read(master
, SOFT_RST
);
379 status
&= 0x000000ff;
380 fsi_master_write(master
, SOFT_RST
, status
);
384 status
&= 0x000000f0;
385 fsi_master_write(master
, SOFT_RST
, status
);
386 status
|= 0x00000001;
387 fsi_master_write(master
, SOFT_RST
, status
);
391 /* playback interrupt */
392 static int fsi_data_push(struct fsi_priv
*fsi
, int startup
)
394 struct snd_pcm_runtime
*runtime
;
395 struct snd_pcm_substream
*substream
= NULL
;
405 !fsi
->substream
->runtime
)
409 substream
= fsi
->substream
;
410 runtime
= substream
->runtime
;
412 /* FSI FIFO has limit.
413 * So, this driver can not send periods data at a time
415 if (fsi
->byte_offset
>=
416 fsi
->period_len
* (fsi
->periods
+ 1)) {
419 fsi
->periods
= (fsi
->periods
+ 1) % runtime
->periods
;
421 if (0 == fsi
->periods
)
422 fsi
->byte_offset
= 0;
425 /* get 1 channel data width */
426 width
= frames_to_bytes(runtime
, 1) / fsi
->chan
;
428 /* get send size for alsa */
429 send
= (fsi
->buffer_len
- fsi
->byte_offset
) / width
;
431 /* get FIFO free size */
432 fifo_free
= (fsi
->fifo_max
* fsi
->chan
) - fsi_get_fifo_residue(fsi
, 1);
435 if (fifo_free
< send
)
438 start
= runtime
->dma_area
;
439 start
+= fsi
->byte_offset
;
443 for (i
= 0; i
< send
; i
++)
444 fsi_reg_write(fsi
, DODT
,
445 ((u32
)*((u16
*)start
+ i
) << 8));
448 for (i
= 0; i
< send
; i
++)
449 fsi_reg_write(fsi
, DODT
, *((u32
*)start
+ i
));
455 fsi
->byte_offset
+= send
* width
;
457 status
= fsi_reg_read(fsi
, DOFF_ST
);
459 struct snd_soc_dai
*dai
= fsi_get_dai(substream
);
461 if (status
& ERR_OVER
)
462 dev_err(dai
->dev
, "over run\n");
463 if (status
& ERR_UNDER
)
464 dev_err(dai
->dev
, "under run\n");
466 fsi_reg_write(fsi
, DOFF_ST
, 0);
468 fsi_irq_enable(fsi
, 1);
471 snd_pcm_period_elapsed(substream
);
476 static int fsi_data_pop(struct fsi_priv
*fsi
, int startup
)
478 struct snd_pcm_runtime
*runtime
;
479 struct snd_pcm_substream
*substream
= NULL
;
489 !fsi
->substream
->runtime
)
493 substream
= fsi
->substream
;
494 runtime
= substream
->runtime
;
496 /* FSI FIFO has limit.
497 * So, this driver can not send periods data at a time
499 if (fsi
->byte_offset
>=
500 fsi
->period_len
* (fsi
->periods
+ 1)) {
503 fsi
->periods
= (fsi
->periods
+ 1) % runtime
->periods
;
505 if (0 == fsi
->periods
)
506 fsi
->byte_offset
= 0;
509 /* get 1 channel data width */
510 width
= frames_to_bytes(runtime
, 1) / fsi
->chan
;
512 /* get free space for alsa */
513 free
= (fsi
->buffer_len
- fsi
->byte_offset
) / width
;
516 fifo_fill
= fsi_get_fifo_residue(fsi
, 0);
518 if (free
< fifo_fill
)
521 start
= runtime
->dma_area
;
522 start
+= fsi
->byte_offset
;
526 for (i
= 0; i
< fifo_fill
; i
++)
527 *((u16
*)start
+ i
) =
528 (u16
)(fsi_reg_read(fsi
, DIDT
) >> 8);
531 for (i
= 0; i
< fifo_fill
; i
++)
532 *((u32
*)start
+ i
) = fsi_reg_read(fsi
, DIDT
);
538 fsi
->byte_offset
+= fifo_fill
* width
;
540 status
= fsi_reg_read(fsi
, DIFF_ST
);
542 struct snd_soc_dai
*dai
= fsi_get_dai(substream
);
544 if (status
& ERR_OVER
)
545 dev_err(dai
->dev
, "over run\n");
546 if (status
& ERR_UNDER
)
547 dev_err(dai
->dev
, "under run\n");
549 fsi_reg_write(fsi
, DIFF_ST
, 0);
551 fsi_irq_enable(fsi
, 0);
554 snd_pcm_period_elapsed(substream
);
559 static irqreturn_t
fsi_interrupt(int irq
, void *data
)
561 struct fsi_master
*master
= data
;
562 u32 status
= fsi_master_read(master
, SOFT_RST
) & ~0x00000010;
563 u32 int_st
= fsi_master_read(master
, INT_ST
);
565 /* clear irq status */
566 fsi_master_write(master
, SOFT_RST
, status
);
567 fsi_master_write(master
, SOFT_RST
, status
| 0x00000010);
569 if (int_st
& INT_A_OUT
)
570 fsi_data_push(&master
->fsia
, 0);
571 if (int_st
& INT_B_OUT
)
572 fsi_data_push(&master
->fsib
, 0);
573 if (int_st
& INT_A_IN
)
574 fsi_data_pop(&master
->fsia
, 0);
575 if (int_st
& INT_B_IN
)
576 fsi_data_pop(&master
->fsib
, 0);
578 fsi_master_write(master
, INT_ST
, 0x0000000);
583 /************************************************************************
589 ************************************************************************/
590 static int fsi_dai_startup(struct snd_pcm_substream
*substream
,
591 struct snd_soc_dai
*dai
)
593 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
595 u32 flags
= fsi_get_info_flags(fsi
);
599 int is_play
= (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
);
603 pm_runtime_get_sync(dai
->dev
);
606 data
= is_play
? (1 << 0) : (1 << 4);
607 is_master
= fsi_is_master_mode(fsi
, is_play
);
609 fsi_reg_mask_set(fsi
, CKG1
, data
, data
);
611 fsi_reg_mask_set(fsi
, CKG1
, data
, 0);
613 /* clock inversion (CKG2) */
615 switch (SH_FSI_INVERSION_MASK
& flags
) {
629 fsi_reg_write(fsi
, CKG2
, data
);
633 reg
= is_play
? DO_FMT
: DI_FMT
;
634 fmt
= is_play
? SH_FSI_GET_OFMT(flags
) : SH_FSI_GET_IFMT(flags
);
636 case SH_FSI_FMT_MONO
:
638 data
= CR_FMT(CR_MONO
);
641 case SH_FSI_FMT_MONO_DELAY
:
643 data
= CR_FMT(CR_MONO_D
);
648 data
= CR_FMT(CR_PCM
);
653 data
= CR_FMT(CR_I2S
);
658 data
= CR_FMT(CR_TDM
) | (fsi
->chan
- 1);
659 fsi
->chan
= is_play
?
660 SH_FSI_GET_CH_O(flags
) : SH_FSI_GET_CH_I(flags
);
662 case SH_FSI_FMT_TDM_DELAY
:
664 data
= CR_FMT(CR_TDM_D
) | (fsi
->chan
- 1);
665 fsi
->chan
= is_play
?
666 SH_FSI_GET_CH_O(flags
) : SH_FSI_GET_CH_I(flags
);
669 dev_err(dai
->dev
, "unknown format.\n");
691 dev_err(dai
->dev
, "channel size error.\n");
695 fsi_reg_write(fsi
, reg
, data
);
698 * clear clk reset if master mode
701 fsi_clk_ctrl(fsi
, 1);
704 fsi_irq_init(fsi
, is_play
);
709 static void fsi_dai_shutdown(struct snd_pcm_substream
*substream
,
710 struct snd_soc_dai
*dai
)
712 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
713 int is_play
= substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
;
715 fsi_irq_disable(fsi
, is_play
);
716 fsi_clk_ctrl(fsi
, 0);
718 pm_runtime_put_sync(dai
->dev
);
721 static int fsi_dai_trigger(struct snd_pcm_substream
*substream
, int cmd
,
722 struct snd_soc_dai
*dai
)
724 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
725 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
726 int is_play
= substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
;
730 case SNDRV_PCM_TRIGGER_START
:
731 fsi_stream_push(fsi
, substream
,
732 frames_to_bytes(runtime
, runtime
->buffer_size
),
733 frames_to_bytes(runtime
, runtime
->period_size
));
734 ret
= is_play
? fsi_data_push(fsi
, 1) : fsi_data_pop(fsi
, 1);
736 case SNDRV_PCM_TRIGGER_STOP
:
737 fsi_irq_disable(fsi
, is_play
);
745 static struct snd_soc_dai_ops fsi_dai_ops
= {
746 .startup
= fsi_dai_startup
,
747 .shutdown
= fsi_dai_shutdown
,
748 .trigger
= fsi_dai_trigger
,
751 /************************************************************************
757 ************************************************************************/
758 static struct snd_pcm_hardware fsi_pcm_hardware
= {
759 .info
= SNDRV_PCM_INFO_INTERLEAVED
|
760 SNDRV_PCM_INFO_MMAP
|
761 SNDRV_PCM_INFO_MMAP_VALID
|
762 SNDRV_PCM_INFO_PAUSE
,
769 .buffer_bytes_max
= 64 * 1024,
770 .period_bytes_min
= 32,
771 .period_bytes_max
= 8192,
777 static int fsi_pcm_open(struct snd_pcm_substream
*substream
)
779 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
782 snd_soc_set_runtime_hwparams(substream
, &fsi_pcm_hardware
);
784 ret
= snd_pcm_hw_constraint_integer(runtime
,
785 SNDRV_PCM_HW_PARAM_PERIODS
);
790 static int fsi_hw_params(struct snd_pcm_substream
*substream
,
791 struct snd_pcm_hw_params
*hw_params
)
793 return snd_pcm_lib_malloc_pages(substream
,
794 params_buffer_bytes(hw_params
));
797 static int fsi_hw_free(struct snd_pcm_substream
*substream
)
799 return snd_pcm_lib_free_pages(substream
);
802 static snd_pcm_uframes_t
fsi_pointer(struct snd_pcm_substream
*substream
)
804 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
805 struct fsi_priv
*fsi
= fsi_get_priv(substream
);
808 location
= (fsi
->byte_offset
- 1);
812 return bytes_to_frames(runtime
, location
);
815 static struct snd_pcm_ops fsi_pcm_ops
= {
816 .open
= fsi_pcm_open
,
817 .ioctl
= snd_pcm_lib_ioctl
,
818 .hw_params
= fsi_hw_params
,
819 .hw_free
= fsi_hw_free
,
820 .pointer
= fsi_pointer
,
823 /************************************************************************
829 ************************************************************************/
830 #define PREALLOC_BUFFER (32 * 1024)
831 #define PREALLOC_BUFFER_MAX (32 * 1024)
833 static void fsi_pcm_free(struct snd_pcm
*pcm
)
835 snd_pcm_lib_preallocate_free_for_all(pcm
);
838 static int fsi_pcm_new(struct snd_card
*card
,
839 struct snd_soc_dai
*dai
,
843 * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
844 * in MMAP mode (i.e. aplay -M)
846 return snd_pcm_lib_preallocate_pages_for_all(
848 SNDRV_DMA_TYPE_CONTINUOUS
,
849 snd_dma_continuous_data(GFP_KERNEL
),
850 PREALLOC_BUFFER
, PREALLOC_BUFFER_MAX
);
853 /************************************************************************
859 ************************************************************************/
860 struct snd_soc_dai fsi_soc_dai
[] = {
896 EXPORT_SYMBOL_GPL(fsi_soc_dai
);
898 struct snd_soc_platform fsi_soc_platform
= {
900 .pcm_ops
= &fsi_pcm_ops
,
901 .pcm_new
= fsi_pcm_new
,
902 .pcm_free
= fsi_pcm_free
,
904 EXPORT_SYMBOL_GPL(fsi_soc_platform
);
906 /************************************************************************
912 ************************************************************************/
913 static int fsi_probe(struct platform_device
*pdev
)
915 struct fsi_master
*master
;
916 struct resource
*res
;
921 dev_err(&pdev
->dev
, "current fsi support id 0 only now\n");
925 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
926 irq
= platform_get_irq(pdev
, 0);
927 if (!res
|| (int)irq
<= 0) {
928 dev_err(&pdev
->dev
, "Not enough FSI platform resources.\n");
933 master
= kzalloc(sizeof(*master
), GFP_KERNEL
);
935 dev_err(&pdev
->dev
, "Could not allocate master\n");
940 master
->base
= ioremap_nocache(res
->start
, resource_size(res
));
943 dev_err(&pdev
->dev
, "Unable to ioremap FSI registers.\n");
948 master
->info
= pdev
->dev
.platform_data
;
949 master
->fsia
.base
= master
->base
;
950 master
->fsia
.master
= master
;
951 master
->fsib
.base
= master
->base
+ 0x40;
952 master
->fsib
.master
= master
;
953 spin_lock_init(&master
->lock
);
955 pm_runtime_enable(&pdev
->dev
);
956 pm_runtime_resume(&pdev
->dev
);
958 fsi_soc_dai
[0].dev
= &pdev
->dev
;
959 fsi_soc_dai
[0].private_data
= &master
->fsia
;
960 fsi_soc_dai
[1].dev
= &pdev
->dev
;
961 fsi_soc_dai
[1].private_data
= &master
->fsib
;
963 fsi_soft_all_reset(master
);
965 ret
= request_irq(irq
, &fsi_interrupt
, IRQF_DISABLED
, "fsi", master
);
967 dev_err(&pdev
->dev
, "irq request err\n");
971 ret
= snd_soc_register_platform(&fsi_soc_platform
);
973 dev_err(&pdev
->dev
, "cannot snd soc register\n");
977 return snd_soc_register_dais(fsi_soc_dai
, ARRAY_SIZE(fsi_soc_dai
));
980 free_irq(irq
, master
);
982 iounmap(master
->base
);
983 pm_runtime_disable(&pdev
->dev
);
991 static int fsi_remove(struct platform_device
*pdev
)
993 struct fsi_master
*master
;
995 master
= fsi_get_master(fsi_soc_dai
[0].private_data
);
997 snd_soc_unregister_dais(fsi_soc_dai
, ARRAY_SIZE(fsi_soc_dai
));
998 snd_soc_unregister_platform(&fsi_soc_platform
);
1000 pm_runtime_disable(&pdev
->dev
);
1002 free_irq(master
->irq
, master
);
1004 iounmap(master
->base
);
1007 fsi_soc_dai
[0].dev
= NULL
;
1008 fsi_soc_dai
[0].private_data
= NULL
;
1009 fsi_soc_dai
[1].dev
= NULL
;
1010 fsi_soc_dai
[1].private_data
= NULL
;
1015 static int fsi_runtime_nop(struct device
*dev
)
1017 /* Runtime PM callback shared between ->runtime_suspend()
1018 * and ->runtime_resume(). Simply returns success.
1020 * This driver re-initializes all registers after
1021 * pm_runtime_get_sync() anyway so there is no need
1022 * to save and restore registers here.
1027 static struct dev_pm_ops fsi_pm_ops
= {
1028 .runtime_suspend
= fsi_runtime_nop
,
1029 .runtime_resume
= fsi_runtime_nop
,
1032 static struct platform_driver fsi_driver
= {
1038 .remove
= fsi_remove
,
1041 static int __init
fsi_mobile_init(void)
1043 return platform_driver_register(&fsi_driver
);
1046 static void __exit
fsi_mobile_exit(void)
1048 platform_driver_unregister(&fsi_driver
);
1050 module_init(fsi_mobile_init
);
1051 module_exit(fsi_mobile_exit
);
1053 MODULE_LICENSE("GPL");
1054 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
1055 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");