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Merge tag 'omap-for-v3.13/fixes-for-merge-window-take2' of git://git.kernel.org/pub...
[linux-2.6.git] / sound / soc / sh / fsi.c
blobb33ca7cd085bf4b766dee1900a4101beffc9fa72
1 /*
2 * Fifo-attached Serial Interface (FSI) support for SH7724
3 *
4 * Copyright (C) 2009 Renesas Solutions Corp.
5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
6 *
7 * Based on ssi.c
8 * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
9 *
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.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/io.h>
19 #include <linux/of.h>
20 #include <linux/of_device.h>
21 #include <linux/scatterlist.h>
22 #include <linux/sh_dma.h>
23 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <linux/workqueue.h>
26 #include <sound/soc.h>
27 #include <sound/pcm_params.h>
28 #include <sound/sh_fsi.h>
29
30 /* PortA/PortB register */
31 #define REG_DO_FMT 0x0000
32 #define REG_DOFF_CTL 0x0004
33 #define REG_DOFF_ST 0x0008
34 #define REG_DI_FMT 0x000C
35 #define REG_DIFF_CTL 0x0010
36 #define REG_DIFF_ST 0x0014
37 #define REG_CKG1 0x0018
38 #define REG_CKG2 0x001C
39 #define REG_DIDT 0x0020
40 #define REG_DODT 0x0024
41 #define REG_MUTE_ST 0x0028
42 #define REG_OUT_DMAC 0x002C
43 #define REG_OUT_SEL 0x0030
44 #define REG_IN_DMAC 0x0038
45
46 /* master register */
47 #define MST_CLK_RST 0x0210
48 #define MST_SOFT_RST 0x0214
49 #define MST_FIFO_SZ 0x0218
50
51 /* core register (depend on FSI version) */
52 #define A_MST_CTLR 0x0180
53 #define B_MST_CTLR 0x01A0
54 #define CPU_INT_ST 0x01F4
55 #define CPU_IEMSK 0x01F8
56 #define CPU_IMSK 0x01FC
57 #define INT_ST 0x0200
58 #define IEMSK 0x0204
59 #define IMSK 0x0208
60
61 /* DO_FMT */
62 /* DI_FMT */
63 #define CR_BWS_MASK (0x3 << 20) /* FSI2 */
64 #define CR_BWS_24 (0x0 << 20) /* FSI2 */
65 #define CR_BWS_16 (0x1 << 20) /* FSI2 */
66 #define CR_BWS_20 (0x2 << 20) /* FSI2 */
67
68 #define CR_DTMD_PCM (0x0 << 8) /* FSI2 */
69 #define CR_DTMD_SPDIF_PCM (0x1 << 8) /* FSI2 */
70 #define CR_DTMD_SPDIF_STREAM (0x2 << 8) /* FSI2 */
71
72 #define CR_MONO (0x0 << 4)
73 #define CR_MONO_D (0x1 << 4)
74 #define CR_PCM (0x2 << 4)
75 #define CR_I2S (0x3 << 4)
76 #define CR_TDM (0x4 << 4)
77 #define CR_TDM_D (0x5 << 4)
78
79 /* OUT_DMAC */
80 /* IN_DMAC */
81 #define VDMD_MASK (0x3 << 4)
82 #define VDMD_FRONT (0x0 << 4) /* Package in front */
83 #define VDMD_BACK (0x1 << 4) /* Package in back */
84 #define VDMD_STREAM (0x2 << 4) /* Stream mode(16bit * 2) */
85
86 #define DMA_ON (0x1 << 0)
87
88 /* DOFF_CTL */
89 /* DIFF_CTL */
90 #define IRQ_HALF 0x00100000
91 #define FIFO_CLR 0x00000001
92
93 /* DOFF_ST */
94 #define ERR_OVER 0x00000010
95 #define ERR_UNDER 0x00000001
96 #define ST_ERR (ERR_OVER | ERR_UNDER)
97
98 /* CKG1 */
99 #define ACKMD_MASK 0x00007000
100 #define BPFMD_MASK 0x00000700
101 #define DIMD (1 << 4)
102 #define DOMD (1 << 0)
103
104 /* A/B MST_CTLR */
105 #define BP (1 << 4) /* Fix the signal of Biphase output */
106 #define SE (1 << 0) /* Fix the master clock */
107
108 /* CLK_RST */
109 #define CRB (1 << 4)
110 #define CRA (1 << 0)
111
112 /* IO SHIFT / MACRO */
113 #define BI_SHIFT 12
114 #define BO_SHIFT 8
115 #define AI_SHIFT 4
116 #define AO_SHIFT 0
117 #define AB_IO(param, shift) (param << shift)
118
119 /* SOFT_RST */
120 #define PBSR (1 << 12) /* Port B Software Reset */
121 #define PASR (1 << 8) /* Port A Software Reset */
122 #define IR (1 << 4) /* Interrupt Reset */
123 #define FSISR (1 << 0) /* Software Reset */
124
125 /* OUT_SEL (FSI2) */
126 #define DMMD (1 << 4) /* SPDIF output timing 0: Biphase only */
127 /* 1: Biphase and serial */
128
129 /* FIFO_SZ */
130 #define FIFO_SZ_MASK 0x7
131
132 #define FSI_RATES SNDRV_PCM_RATE_8000_96000
133
134 #define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
135
136 /*
137 * bus options
138 *
139 * 0x000000BA
140 *
141 * A : sample widtht 16bit setting
142 * B : sample widtht 24bit setting
143 */
144
145 #define SHIFT_16DATA 0
146 #define SHIFT_24DATA 4
147
148 #define PACKAGE_24BITBUS_BACK 0
149 #define PACKAGE_24BITBUS_FRONT 1
150 #define PACKAGE_16BITBUS_STREAM 2
151
152 #define BUSOP_SET(s, a) ((a) << SHIFT_ ## s ## DATA)
153 #define BUSOP_GET(s, a) (((a) >> SHIFT_ ## s ## DATA) & 0xF)
154
155 /*
156 * FSI driver use below type name for variable
157 *
158 * xxx_num : number of data
159 * xxx_pos : position of data
160 * xxx_capa : capacity of data
161 */
162
163 /*
164 * period/frame/sample image
165 *
166 * ex) PCM (2ch)
167 *
168 * period pos period pos
169 * [n] [n + 1]
170 * |<-------------------- period--------------------->|
171 * ==|============================================ ... =|==
172 * | |
173 * ||<----- frame ----->|<------ frame ----->| ... |
174 * |+--------------------+--------------------+- ... |
175 * ||[ sample ][ sample ]|[ sample ][ sample ]| ... |
176 * |+--------------------+--------------------+- ... |
177 * ==|============================================ ... =|==
178 */
179
180 /*
181 * FSI FIFO image
182 *
183 * | |
184 * | |
185 * | [ sample ] |
186 * | [ sample ] |
187 * | [ sample ] |
188 * | [ sample ] |
189 * --> go to codecs
190 */
191
192 /*
193 * FSI clock
194 *
195 * FSIxCLK [CPG] (ick) -------> |
196 * |-> FSI_DIV (div)-> FSI2
197 * FSIxCK [external] (xck) ---> |
198 */
199
200 /*
201 * struct
202 */
203
204 struct fsi_stream_handler;
205 struct fsi_stream {
206
207 /*
208 * these are initialized by fsi_stream_init()
209 */
210 struct snd_pcm_substream *substream;
211 int fifo_sample_capa; /* sample capacity of FSI FIFO */
212 int buff_sample_capa; /* sample capacity of ALSA buffer */
213 int buff_sample_pos; /* sample position of ALSA buffer */
214 int period_samples; /* sample number / 1 period */
215 int period_pos; /* current period position */
216 int sample_width; /* sample width */
217 int uerr_num;
218 int oerr_num;
219
220 /*
221 * bus options
222 */
223 u32 bus_option;
224
225 /*
226 * thse are initialized by fsi_handler_init()
227 */
228 struct fsi_stream_handler *handler;
229 struct fsi_priv *priv;
230
231 /*
232 * these are for DMAEngine
233 */
234 struct dma_chan *chan;
235 struct sh_dmae_slave slave; /* see fsi_handler_init() */
236 struct work_struct work;
237 dma_addr_t dma;
238 int loop_cnt;
239 int additional_pos;
240 };
241
242 struct fsi_clk {
243 /* see [FSI clock] */
244 struct clk *own;
245 struct clk *xck;
246 struct clk *ick;
247 struct clk *div;
248 int (*set_rate)(struct device *dev,
249 struct fsi_priv *fsi);
250
251 unsigned long rate;
252 unsigned int count;
253 };
254
255 struct fsi_priv {
256 void __iomem *base;
257 struct fsi_master *master;
258
259 struct fsi_stream playback;
260 struct fsi_stream capture;
261
262 struct fsi_clk clock;
263
264 u32 fmt;
265
266 int chan_num:16;
267 int clk_master:1;
268 int clk_cpg:1;
269 int spdif:1;
270 int enable_stream:1;
271 int bit_clk_inv:1;
272 int lr_clk_inv:1;
273 };
274
275 struct fsi_stream_handler {
276 int (*init)(struct fsi_priv *fsi, struct fsi_stream *io);
277 int (*quit)(struct fsi_priv *fsi, struct fsi_stream *io);
278 int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev);
279 int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io);
280 int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io);
281 int (*start_stop)(struct fsi_priv *fsi, struct fsi_stream *io,
282 int enable);
283 };
284 #define fsi_stream_handler_call(io, func, args...) \
285 (!(io) ? -ENODEV : \
286 !((io)->handler->func) ? 0 : \
287 (io)->handler->func(args))
288
289 struct fsi_core {
290 int ver;
291
292 u32 int_st;
293 u32 iemsk;
294 u32 imsk;
295 u32 a_mclk;
296 u32 b_mclk;
297 };
298
299 struct fsi_master {
300 void __iomem *base;
301 struct fsi_priv fsia;
302 struct fsi_priv fsib;
303 const struct fsi_core *core;
304 spinlock_t lock;
305 };
306
307 static int fsi_stream_is_play(struct fsi_priv *fsi, struct fsi_stream *io);
308
309 /*
310 * basic read write function
311 */
312
313 static void __fsi_reg_write(u32 __iomem *reg, u32 data)
314 {
315 /* valid data area is 24bit */
316 data &= 0x00ffffff;
317
318 __raw_writel(data, reg);
319 }
320
321 static u32 __fsi_reg_read(u32 __iomem *reg)
322 {
323 return __raw_readl(reg);
324 }
325
326 static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
327 {
328 u32 val = __fsi_reg_read(reg);
329
330 val &= ~mask;
331 val |= data & mask;
332
333 __fsi_reg_write(reg, val);
334 }
335
336 #define fsi_reg_write(p, r, d)\
337 __fsi_reg_write((p->base + REG_##r), d)
338
339 #define fsi_reg_read(p, r)\
340 __fsi_reg_read((p->base + REG_##r))
341
342 #define fsi_reg_mask_set(p, r, m, d)\
343 __fsi_reg_mask_set((p->base + REG_##r), m, d)
344
345 #define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
346 #define fsi_core_read(p, r) _fsi_master_read(p, p->core->r)
347 static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
348 {
349 u32 ret;
350 unsigned long flags;
351
352 spin_lock_irqsave(&master->lock, flags);
353 ret = __fsi_reg_read(master->base + reg);
354 spin_unlock_irqrestore(&master->lock, flags);
355
356 return ret;
357 }
358
359 #define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
360 #define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d)
361 static void _fsi_master_mask_set(struct fsi_master *master,
362 u32 reg, u32 mask, u32 data)
363 {
364 unsigned long flags;
365
366 spin_lock_irqsave(&master->lock, flags);
367 __fsi_reg_mask_set(master->base + reg, mask, data);
368 spin_unlock_irqrestore(&master->lock, flags);
369 }
370
371 /*
372 * basic function
373 */
374 static int fsi_version(struct fsi_master *master)
375 {
376 return master->core->ver;
377 }
378
379 static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
380 {
381 return fsi->master;
382 }
383
384 static int fsi_is_clk_master(struct fsi_priv *fsi)
385 {
386 return fsi->clk_master;
387 }
388
389 static int fsi_is_port_a(struct fsi_priv *fsi)
390 {
391 return fsi->master->base == fsi->base;
392 }
393
394 static int fsi_is_spdif(struct fsi_priv *fsi)
395 {
396 return fsi->spdif;
397 }
398
399 static int fsi_is_enable_stream(struct fsi_priv *fsi)
400 {
401 return fsi->enable_stream;
402 }
403
404 static int fsi_is_play(struct snd_pcm_substream *substream)
405 {
406 return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
407 }
408
409 static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
410 {
411 struct snd_soc_pcm_runtime *rtd = substream->private_data;
412
413 return rtd->cpu_dai;
414 }
415
416 static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
417 {
418 struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
419
420 if (dai->id == 0)
421 return &master->fsia;
422 else
423 return &master->fsib;
424 }
425
426 static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
427 {
428 return fsi_get_priv_frm_dai(fsi_get_dai(substream));
429 }
430
431 static u32 fsi_get_port_shift(struct fsi_priv *fsi, struct fsi_stream *io)
432 {
433 int is_play = fsi_stream_is_play(fsi, io);
434 int is_porta = fsi_is_port_a(fsi);
435 u32 shift;
436
437 if (is_porta)
438 shift = is_play ? AO_SHIFT : AI_SHIFT;
439 else
440 shift = is_play ? BO_SHIFT : BI_SHIFT;
441
442 return shift;
443 }
444
445 static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
446 {
447 return frames * fsi->chan_num;
448 }
449
450 static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
451 {
452 return samples / fsi->chan_num;
453 }
454
455 static int fsi_get_current_fifo_samples(struct fsi_priv *fsi,
456 struct fsi_stream *io)
457 {
458 int is_play = fsi_stream_is_play(fsi, io);
459 u32 status;
460 int frames;
461
462 status = is_play ?
463 fsi_reg_read(fsi, DOFF_ST) :
464 fsi_reg_read(fsi, DIFF_ST);
465
466 frames = 0x1ff & (status >> 8);
467
468 return fsi_frame2sample(fsi, frames);
469 }
470
471 static void fsi_count_fifo_err(struct fsi_priv *fsi)
472 {
473 u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
474 u32 istatus = fsi_reg_read(fsi, DIFF_ST);
475
476 if (ostatus & ERR_OVER)
477 fsi->playback.oerr_num++;
478
479 if (ostatus & ERR_UNDER)
480 fsi->playback.uerr_num++;
481
482 if (istatus & ERR_OVER)
483 fsi->capture.oerr_num++;
484
485 if (istatus & ERR_UNDER)
486 fsi->capture.uerr_num++;
487
488 fsi_reg_write(fsi, DOFF_ST, 0);
489 fsi_reg_write(fsi, DIFF_ST, 0);
490 }
491
492 /*
493 * fsi_stream_xx() function
494 */
495 static inline int fsi_stream_is_play(struct fsi_priv *fsi,
496 struct fsi_stream *io)
497 {
498 return &fsi->playback == io;
499 }
500
501 static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi,
502 struct snd_pcm_substream *substream)
503 {
504 return fsi_is_play(substream) ? &fsi->playback : &fsi->capture;
505 }
506
507 static int fsi_stream_is_working(struct fsi_priv *fsi,
508 struct fsi_stream *io)
509 {
510 struct fsi_master *master = fsi_get_master(fsi);
511 unsigned long flags;
512 int ret;
513
514 spin_lock_irqsave(&master->lock, flags);
515 ret = !!(io->substream && io->substream->runtime);
516 spin_unlock_irqrestore(&master->lock, flags);
517
518 return ret;
519 }
520
521 static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io)
522 {
523 return io->priv;
524 }
525
526 static void fsi_stream_init(struct fsi_priv *fsi,
527 struct fsi_stream *io,
528 struct snd_pcm_substream *substream)
529 {
530 struct snd_pcm_runtime *runtime = substream->runtime;
531 struct fsi_master *master = fsi_get_master(fsi);
532 unsigned long flags;
533
534 spin_lock_irqsave(&master->lock, flags);
535 io->substream = substream;
536 io->buff_sample_capa = fsi_frame2sample(fsi, runtime->buffer_size);
537 io->buff_sample_pos = 0;
538 io->period_samples = fsi_frame2sample(fsi, runtime->period_size);
539 io->period_pos = 0;
540 io->sample_width = samples_to_bytes(runtime, 1);
541 io->bus_option = 0;
542 io->oerr_num = -1; /* ignore 1st err */
543 io->uerr_num = -1; /* ignore 1st err */
544 fsi_stream_handler_call(io, init, fsi, io);
545 spin_unlock_irqrestore(&master->lock, flags);
546 }
547
548 static void fsi_stream_quit(struct fsi_priv *fsi, struct fsi_stream *io)
549 {
550 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
551 struct fsi_master *master = fsi_get_master(fsi);
552 unsigned long flags;
553
554 spin_lock_irqsave(&master->lock, flags);
555
556 if (io->oerr_num > 0)
557 dev_err(dai->dev, "over_run = %d\n", io->oerr_num);
558
559 if (io->uerr_num > 0)
560 dev_err(dai->dev, "under_run = %d\n", io->uerr_num);
561
562 fsi_stream_handler_call(io, quit, fsi, io);
563 io->substream = NULL;
564 io->buff_sample_capa = 0;
565 io->buff_sample_pos = 0;
566 io->period_samples = 0;
567 io->period_pos = 0;
568 io->sample_width = 0;
569 io->bus_option = 0;
570 io->oerr_num = 0;
571 io->uerr_num = 0;
572 spin_unlock_irqrestore(&master->lock, flags);
573 }
574
575 static int fsi_stream_transfer(struct fsi_stream *io)
576 {
577 struct fsi_priv *fsi = fsi_stream_to_priv(io);
578 if (!fsi)
579 return -EIO;
580
581 return fsi_stream_handler_call(io, transfer, fsi, io);
582 }
583
584 #define fsi_stream_start(fsi, io)\
585 fsi_stream_handler_call(io, start_stop, fsi, io, 1)
586
587 #define fsi_stream_stop(fsi, io)\
588 fsi_stream_handler_call(io, start_stop, fsi, io, 0)
589
590 static int fsi_stream_probe(struct fsi_priv *fsi, struct device *dev)
591 {
592 struct fsi_stream *io;
593 int ret1, ret2;
594
595 io = &fsi->playback;
596 ret1 = fsi_stream_handler_call(io, probe, fsi, io, dev);
597
598 io = &fsi->capture;
599 ret2 = fsi_stream_handler_call(io, probe, fsi, io, dev);
600
601 if (ret1 < 0)
602 return ret1;
603 if (ret2 < 0)
604 return ret2;
605
606 return 0;
607 }
608
609 static int fsi_stream_remove(struct fsi_priv *fsi)
610 {
611 struct fsi_stream *io;
612 int ret1, ret2;
613
614 io = &fsi->playback;
615 ret1 = fsi_stream_handler_call(io, remove, fsi, io);
616
617 io = &fsi->capture;
618 ret2 = fsi_stream_handler_call(io, remove, fsi, io);
619
620 if (ret1 < 0)
621 return ret1;
622 if (ret2 < 0)
623 return ret2;
624
625 return 0;
626 }
627
628 /*
629 * format/bus/dma setting
630 */
631 static void fsi_format_bus_setup(struct fsi_priv *fsi, struct fsi_stream *io,
632 u32 bus, struct device *dev)
633 {
634 struct fsi_master *master = fsi_get_master(fsi);
635 int is_play = fsi_stream_is_play(fsi, io);
636 u32 fmt = fsi->fmt;
637
638 if (fsi_version(master) >= 2) {
639 u32 dma = 0;
640
641 /*
642 * FSI2 needs DMA/Bus setting
643 */
644 switch (bus) {
645 case PACKAGE_24BITBUS_FRONT:
646 fmt |= CR_BWS_24;
647 dma |= VDMD_FRONT;
648 dev_dbg(dev, "24bit bus / package in front\n");
649 break;
650 case PACKAGE_16BITBUS_STREAM:
651 fmt |= CR_BWS_16;
652 dma |= VDMD_STREAM;
653 dev_dbg(dev, "16bit bus / stream mode\n");
654 break;
655 case PACKAGE_24BITBUS_BACK:
656 default:
657 fmt |= CR_BWS_24;
658 dma |= VDMD_BACK;
659 dev_dbg(dev, "24bit bus / package in back\n");
660 break;
661 }
662
663 if (is_play)
664 fsi_reg_write(fsi, OUT_DMAC, dma);
665 else
666 fsi_reg_write(fsi, IN_DMAC, dma);
667 }
668
669 if (is_play)
670 fsi_reg_write(fsi, DO_FMT, fmt);
671 else
672 fsi_reg_write(fsi, DI_FMT, fmt);
673 }
674
675 /*
676 * irq function
677 */
678
679 static void fsi_irq_enable(struct fsi_priv *fsi, struct fsi_stream *io)
680 {
681 u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
682 struct fsi_master *master = fsi_get_master(fsi);
683
684 fsi_core_mask_set(master, imsk, data, data);
685 fsi_core_mask_set(master, iemsk, data, data);
686 }
687
688 static void fsi_irq_disable(struct fsi_priv *fsi, struct fsi_stream *io)
689 {
690 u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
691 struct fsi_master *master = fsi_get_master(fsi);
692
693 fsi_core_mask_set(master, imsk, data, 0);
694 fsi_core_mask_set(master, iemsk, data, 0);
695 }
696
697 static u32 fsi_irq_get_status(struct fsi_master *master)
698 {
699 return fsi_core_read(master, int_st);
700 }
701
702 static void fsi_irq_clear_status(struct fsi_priv *fsi)
703 {
704 u32 data = 0;
705 struct fsi_master *master = fsi_get_master(fsi);
706
707 data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->playback));
708 data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->capture));
709
710 /* clear interrupt factor */
711 fsi_core_mask_set(master, int_st, data, 0);
712 }
713
714 /*
715 * SPDIF master clock function
716 *
717 * These functions are used later FSI2
718 */
719 static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
720 {
721 struct fsi_master *master = fsi_get_master(fsi);
722 u32 mask, val;
723
724 mask = BP | SE;
725 val = enable ? mask : 0;
726
727 fsi_is_port_a(fsi) ?
728 fsi_core_mask_set(master, a_mclk, mask, val) :
729 fsi_core_mask_set(master, b_mclk, mask, val);
730 }
731
732 /*
733 * clock function
734 */
735 static int fsi_clk_init(struct device *dev,
736 struct fsi_priv *fsi,
737 int xck,
738 int ick,
739 int div,
740 int (*set_rate)(struct device *dev,
741 struct fsi_priv *fsi))
742 {
743 struct fsi_clk *clock = &fsi->clock;
744 int is_porta = fsi_is_port_a(fsi);
745
746 clock->xck = NULL;
747 clock->ick = NULL;
748 clock->div = NULL;
749 clock->rate = 0;
750 clock->count = 0;
751 clock->set_rate = set_rate;
752
753 clock->own = devm_clk_get(dev, NULL);
754 if (IS_ERR(clock->own))
755 return -EINVAL;
756
757 /* external clock */
758 if (xck) {
759 clock->xck = devm_clk_get(dev, is_porta ? "xcka" : "xckb");
760 if (IS_ERR(clock->xck)) {
761 dev_err(dev, "can't get xck clock\n");
762 return -EINVAL;
763 }
764 if (clock->xck == clock->own) {
765 dev_err(dev, "cpu doesn't support xck clock\n");
766 return -EINVAL;
767 }
768 }
769
770 /* FSIACLK/FSIBCLK */
771 if (ick) {
772 clock->ick = devm_clk_get(dev, is_porta ? "icka" : "ickb");
773 if (IS_ERR(clock->ick)) {
774 dev_err(dev, "can't get ick clock\n");
775 return -EINVAL;
776 }
777 if (clock->ick == clock->own) {
778 dev_err(dev, "cpu doesn't support ick clock\n");
779 return -EINVAL;
780 }
781 }
782
783 /* FSI-DIV */
784 if (div) {
785 clock->div = devm_clk_get(dev, is_porta ? "diva" : "divb");
786 if (IS_ERR(clock->div)) {
787 dev_err(dev, "can't get div clock\n");
788 return -EINVAL;
789 }
790 if (clock->div == clock->own) {
791 dev_err(dev, "cpu doens't support div clock\n");
792 return -EINVAL;
793 }
794 }
795
796 return 0;
797 }
798
799 #define fsi_clk_invalid(fsi) fsi_clk_valid(fsi, 0)
800 static void fsi_clk_valid(struct fsi_priv *fsi, unsigned long rate)
801 {
802 fsi->clock.rate = rate;
803 }
804
805 static int fsi_clk_is_valid(struct fsi_priv *fsi)
806 {
807 return fsi->clock.set_rate &&
808 fsi->clock.rate;
809 }
810
811 static int fsi_clk_enable(struct device *dev,
812 struct fsi_priv *fsi)
813 {
814 struct fsi_clk *clock = &fsi->clock;
815 int ret = -EINVAL;
816
817 if (!fsi_clk_is_valid(fsi))
818 return ret;
819
820 if (0 == clock->count) {
821 ret = clock->set_rate(dev, fsi);
822 if (ret < 0) {
823 fsi_clk_invalid(fsi);
824 return ret;
825 }
826
827 if (clock->xck)
828 clk_enable(clock->xck);
829 if (clock->ick)
830 clk_enable(clock->ick);
831 if (clock->div)
832 clk_enable(clock->div);
833
834 clock->count++;
835 }
836
837 return ret;
838 }
839
840 static int fsi_clk_disable(struct device *dev,
841 struct fsi_priv *fsi)
842 {
843 struct fsi_clk *clock = &fsi->clock;
844
845 if (!fsi_clk_is_valid(fsi))
846 return -EINVAL;
847
848 if (1 == clock->count--) {
849 if (clock->xck)
850 clk_disable(clock->xck);
851 if (clock->ick)
852 clk_disable(clock->ick);
853 if (clock->div)
854 clk_disable(clock->div);
855 }
856
857 return 0;
858 }
859
860 static int fsi_clk_set_ackbpf(struct device *dev,
861 struct fsi_priv *fsi,
862 int ackmd, int bpfmd)
863 {
864 u32 data = 0;
865
866 /* check ackmd/bpfmd relationship */
867 if (bpfmd > ackmd) {
868 dev_err(dev, "unsupported rate (%d/%d)\n", ackmd, bpfmd);
869 return -EINVAL;
870 }
871
872 /* ACKMD */
873 switch (ackmd) {
874 case 512:
875 data |= (0x0 << 12);
876 break;
877 case 256:
878 data |= (0x1 << 12);
879 break;
880 case 128:
881 data |= (0x2 << 12);
882 break;
883 case 64:
884 data |= (0x3 << 12);
885 break;
886 case 32:
887 data |= (0x4 << 12);
888 break;
889 default:
890 dev_err(dev, "unsupported ackmd (%d)\n", ackmd);
891 return -EINVAL;
892 }
893
894 /* BPFMD */
895 switch (bpfmd) {
896 case 32:
897 data |= (0x0 << 8);
898 break;
899 case 64:
900 data |= (0x1 << 8);
901 break;
902 case 128:
903 data |= (0x2 << 8);
904 break;
905 case 256:
906 data |= (0x3 << 8);
907 break;
908 case 512:
909 data |= (0x4 << 8);
910 break;
911 case 16:
912 data |= (0x7 << 8);
913 break;
914 default:
915 dev_err(dev, "unsupported bpfmd (%d)\n", bpfmd);
916 return -EINVAL;
917 }
918
919 dev_dbg(dev, "ACKMD/BPFMD = %d/%d\n", ackmd, bpfmd);
920
921 fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
922 udelay(10);
923
924 return 0;
925 }
926
927 static int fsi_clk_set_rate_external(struct device *dev,
928 struct fsi_priv *fsi)
929 {
930 struct clk *xck = fsi->clock.xck;
931 struct clk *ick = fsi->clock.ick;
932 unsigned long rate = fsi->clock.rate;
933 unsigned long xrate;
934 int ackmd, bpfmd;
935 int ret = 0;
936
937 /* check clock rate */
938 xrate = clk_get_rate(xck);
939 if (xrate % rate) {
940 dev_err(dev, "unsupported clock rate\n");
941 return -EINVAL;
942 }
943
944 clk_set_parent(ick, xck);
945 clk_set_rate(ick, xrate);
946
947 bpfmd = fsi->chan_num * 32;
948 ackmd = xrate / rate;
949
950 dev_dbg(dev, "external/rate = %ld/%ld\n", xrate, rate);
951
952 ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd);
953 if (ret < 0)
954 dev_err(dev, "%s failed", __func__);
955
956 return ret;
957 }
958
959 static int fsi_clk_set_rate_cpg(struct device *dev,
960 struct fsi_priv *fsi)
961 {
962 struct clk *ick = fsi->clock.ick;
963 struct clk *div = fsi->clock.div;
964 unsigned long rate = fsi->clock.rate;
965 unsigned long target = 0; /* 12288000 or 11289600 */
966 unsigned long actual, cout;
967 unsigned long diff, min;
968 unsigned long best_cout, best_act;
969 int adj;
970 int ackmd, bpfmd;
971 int ret = -EINVAL;
972
973 if (!(12288000 % rate))
974 target = 12288000;
975 if (!(11289600 % rate))
976 target = 11289600;
977 if (!target) {
978 dev_err(dev, "unsupported rate\n");
979 return ret;
980 }
981
982 bpfmd = fsi->chan_num * 32;
983 ackmd = target / rate;
984 ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd);
985 if (ret < 0) {
986 dev_err(dev, "%s failed", __func__);
987 return ret;
988 }
989
990 /*
991 * The clock flow is
992 *
993 * [CPG] = cout => [FSI_DIV] = audio => [FSI] => [codec]
994 *
995 * But, it needs to find best match of CPG and FSI_DIV
996 * combination, since it is difficult to generate correct
997 * frequency of audio clock from ick clock only.
998 * Because ick is created from its parent clock.
999 *
1000 * target = rate x [512/256/128/64]fs
1001 * cout = round(target x adjustment)
1002 * actual = cout / adjustment (by FSI-DIV) ~= target
1003 * audio = actual
1004 */
1005 min = ~0;
1006 best_cout = 0;
1007 best_act = 0;
1008 for (adj = 1; adj < 0xffff; adj++) {
1009
1010 cout = target * adj;
1011 if (cout > 100000000) /* max clock = 100MHz */
1012 break;
1013
1014 /* cout/actual audio clock */
1015 cout = clk_round_rate(ick, cout);
1016 actual = cout / adj;
1017
1018 /* find best frequency */
1019 diff = abs(actual - target);
1020 if (diff < min) {
1021 min = diff;
1022 best_cout = cout;
1023 best_act = actual;
1024 }
1025 }
1026
1027 ret = clk_set_rate(ick, best_cout);
1028 if (ret < 0) {
1029 dev_err(dev, "ick clock failed\n");
1030 return -EIO;
1031 }
1032
1033 ret = clk_set_rate(div, clk_round_rate(div, best_act));
1034 if (ret < 0) {
1035 dev_err(dev, "div clock failed\n");
1036 return -EIO;
1037 }
1038
1039 dev_dbg(dev, "ick/div = %ld/%ld\n",
1040 clk_get_rate(ick), clk_get_rate(div));
1041
1042 return ret;
1043 }
1044
1045 /*
1046 * pio data transfer handler
1047 */
1048 static void fsi_pio_push16(struct fsi_priv *fsi, u8 *_buf, int samples)
1049 {
1050 int i;
1051
1052 if (fsi_is_enable_stream(fsi)) {
1053 /*
1054 * stream mode
1055 * see
1056 * fsi_pio_push_init()
1057 */
1058 u32 *buf = (u32 *)_buf;
1059
1060 for (i = 0; i < samples / 2; i++)
1061 fsi_reg_write(fsi, DODT, buf[i]);
1062 } else {
1063 /* normal mode */
1064 u16 *buf = (u16 *)_buf;
1065
1066 for (i = 0; i < samples; i++)
1067 fsi_reg_write(fsi, DODT, ((u32)*(buf + i) << 8));
1068 }
1069 }
1070
1071 static void fsi_pio_pop16(struct fsi_priv *fsi, u8 *_buf, int samples)
1072 {
1073 u16 *buf = (u16 *)_buf;
1074 int i;
1075
1076 for (i = 0; i < samples; i++)
1077 *(buf + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
1078 }
1079
1080 static void fsi_pio_push32(struct fsi_priv *fsi, u8 *_buf, int samples)
1081 {
1082 u32 *buf = (u32 *)_buf;
1083 int i;
1084
1085 for (i = 0; i < samples; i++)
1086 fsi_reg_write(fsi, DODT, *(buf + i));
1087 }
1088
1089 static void fsi_pio_pop32(struct fsi_priv *fsi, u8 *_buf, int samples)
1090 {
1091 u32 *buf = (u32 *)_buf;
1092 int i;
1093
1094 for (i = 0; i < samples; i++)
1095 *(buf + i) = fsi_reg_read(fsi, DIDT);
1096 }
1097
1098 static u8 *fsi_pio_get_area(struct fsi_priv *fsi, struct fsi_stream *io)
1099 {
1100 struct snd_pcm_runtime *runtime = io->substream->runtime;
1101
1102 return runtime->dma_area +
1103 samples_to_bytes(runtime, io->buff_sample_pos);
1104 }
1105
1106 static int fsi_pio_transfer(struct fsi_priv *fsi, struct fsi_stream *io,
1107 void (*run16)(struct fsi_priv *fsi, u8 *buf, int samples),
1108 void (*run32)(struct fsi_priv *fsi, u8 *buf, int samples),
1109 int samples)
1110 {
1111 struct snd_pcm_runtime *runtime;
1112 struct snd_pcm_substream *substream;
1113 u8 *buf;
1114 int over_period;
1115
1116 if (!fsi_stream_is_working(fsi, io))
1117 return -EINVAL;
1118
1119 over_period = 0;
1120 substream = io->substream;
1121 runtime = substream->runtime;
1122
1123 /* FSI FIFO has limit.
1124 * So, this driver can not send periods data at a time
1125 */
1126 if (io->buff_sample_pos >=
1127 io->period_samples * (io->period_pos + 1)) {
1128
1129 over_period = 1;
1130 io->period_pos = (io->period_pos + 1) % runtime->periods;
1131
1132 if (0 == io->period_pos)
1133 io->buff_sample_pos = 0;
1134 }
1135
1136 buf = fsi_pio_get_area(fsi, io);
1137
1138 switch (io->sample_width) {
1139 case 2:
1140 run16(fsi, buf, samples);
1141 break;
1142 case 4:
1143 run32(fsi, buf, samples);
1144 break;
1145 default:
1146 return -EINVAL;
1147 }
1148
1149 /* update buff_sample_pos */
1150 io->buff_sample_pos += samples;
1151
1152 if (over_period)
1153 snd_pcm_period_elapsed(substream);
1154
1155 return 0;
1156 }
1157
1158 static int fsi_pio_pop(struct fsi_priv *fsi, struct fsi_stream *io)
1159 {
1160 int sample_residues; /* samples in FSI fifo */
1161 int sample_space; /* ALSA free samples space */
1162 int samples;
1163
1164 sample_residues = fsi_get_current_fifo_samples(fsi, io);
1165 sample_space = io->buff_sample_capa - io->buff_sample_pos;
1166
1167 samples = min(sample_residues, sample_space);
1168
1169 return fsi_pio_transfer(fsi, io,
1170 fsi_pio_pop16,
1171 fsi_pio_pop32,
1172 samples);
1173 }
1174
1175 static int fsi_pio_push(struct fsi_priv *fsi, struct fsi_stream *io)
1176 {
1177 int sample_residues; /* ALSA residue samples */
1178 int sample_space; /* FSI fifo free samples space */
1179 int samples;
1180
1181 sample_residues = io->buff_sample_capa - io->buff_sample_pos;
1182 sample_space = io->fifo_sample_capa -
1183 fsi_get_current_fifo_samples(fsi, io);
1184
1185 samples = min(sample_residues, sample_space);
1186
1187 return fsi_pio_transfer(fsi, io,
1188 fsi_pio_push16,
1189 fsi_pio_push32,
1190 samples);
1191 }
1192
1193 static int fsi_pio_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1194 int enable)
1195 {
1196 struct fsi_master *master = fsi_get_master(fsi);
1197 u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
1198
1199 if (enable)
1200 fsi_irq_enable(fsi, io);
1201 else
1202 fsi_irq_disable(fsi, io);
1203
1204 if (fsi_is_clk_master(fsi))
1205 fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
1206
1207 return 0;
1208 }
1209
1210 static int fsi_pio_push_init(struct fsi_priv *fsi, struct fsi_stream *io)
1211 {
1212 /*
1213 * we can use 16bit stream mode
1214 * when "playback" and "16bit data"
1215 * and platform allows "stream mode"
1216 * see
1217 * fsi_pio_push16()
1218 */
1219 if (fsi_is_enable_stream(fsi))
1220 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1221 BUSOP_SET(16, PACKAGE_16BITBUS_STREAM);
1222 else
1223 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1224 BUSOP_SET(16, PACKAGE_24BITBUS_BACK);
1225 return 0;
1226 }
1227
1228 static int fsi_pio_pop_init(struct fsi_priv *fsi, struct fsi_stream *io)
1229 {
1230 /*
1231 * always 24bit bus, package back when "capture"
1232 */
1233 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1234 BUSOP_SET(16, PACKAGE_24BITBUS_BACK);
1235 return 0;
1236 }
1237
1238 static struct fsi_stream_handler fsi_pio_push_handler = {
1239 .init = fsi_pio_push_init,
1240 .transfer = fsi_pio_push,
1241 .start_stop = fsi_pio_start_stop,
1242 };
1243
1244 static struct fsi_stream_handler fsi_pio_pop_handler = {
1245 .init = fsi_pio_pop_init,
1246 .transfer = fsi_pio_pop,
1247 .start_stop = fsi_pio_start_stop,
1248 };
1249
1250 static irqreturn_t fsi_interrupt(int irq, void *data)
1251 {
1252 struct fsi_master *master = data;
1253 u32 int_st = fsi_irq_get_status(master);
1254
1255 /* clear irq status */
1256 fsi_master_mask_set(master, SOFT_RST, IR, 0);
1257 fsi_master_mask_set(master, SOFT_RST, IR, IR);
1258
1259 if (int_st & AB_IO(1, AO_SHIFT))
1260 fsi_stream_transfer(&master->fsia.playback);
1261 if (int_st & AB_IO(1, BO_SHIFT))
1262 fsi_stream_transfer(&master->fsib.playback);
1263 if (int_st & AB_IO(1, AI_SHIFT))
1264 fsi_stream_transfer(&master->fsia.capture);
1265 if (int_st & AB_IO(1, BI_SHIFT))
1266 fsi_stream_transfer(&master->fsib.capture);
1267
1268 fsi_count_fifo_err(&master->fsia);
1269 fsi_count_fifo_err(&master->fsib);
1270
1271 fsi_irq_clear_status(&master->fsia);
1272 fsi_irq_clear_status(&master->fsib);
1273
1274 return IRQ_HANDLED;
1275 }
1276
1277 /*
1278 * dma data transfer handler
1279 */
1280 static int fsi_dma_init(struct fsi_priv *fsi, struct fsi_stream *io)
1281 {
1282 struct snd_pcm_runtime *runtime = io->substream->runtime;
1283 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
1284 enum dma_data_direction dir = fsi_stream_is_play(fsi, io) ?
1285 DMA_TO_DEVICE : DMA_FROM_DEVICE;
1286
1287 /*
1288 * 24bit data : 24bit bus / package in back
1289 * 16bit data : 16bit bus / stream mode
1290 */
1291 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1292 BUSOP_SET(16, PACKAGE_16BITBUS_STREAM);
1293
1294 io->loop_cnt = 2; /* push 1st, 2nd period first, then 3rd, 4th... */
1295 io->additional_pos = 0;
1296 io->dma = dma_map_single(dai->dev, runtime->dma_area,
1297 snd_pcm_lib_buffer_bytes(io->substream), dir);
1298 return 0;
1299 }
1300
1301 static int fsi_dma_quit(struct fsi_priv *fsi, struct fsi_stream *io)
1302 {
1303 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
1304 enum dma_data_direction dir = fsi_stream_is_play(fsi, io) ?
1305 DMA_TO_DEVICE : DMA_FROM_DEVICE;
1306
1307 dma_unmap_single(dai->dev, io->dma,
1308 snd_pcm_lib_buffer_bytes(io->substream), dir);
1309 return 0;
1310 }
1311
1312 static dma_addr_t fsi_dma_get_area(struct fsi_stream *io, int additional)
1313 {
1314 struct snd_pcm_runtime *runtime = io->substream->runtime;
1315 int period = io->period_pos + additional;
1316
1317 if (period >= runtime->periods)
1318 period = 0;
1319
1320 return io->dma + samples_to_bytes(runtime, period * io->period_samples);
1321 }
1322
1323 static void fsi_dma_complete(void *data)
1324 {
1325 struct fsi_stream *io = (struct fsi_stream *)data;
1326 struct fsi_priv *fsi = fsi_stream_to_priv(io);
1327 struct snd_pcm_runtime *runtime = io->substream->runtime;
1328 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
1329 enum dma_data_direction dir = fsi_stream_is_play(fsi, io) ?
1330 DMA_TO_DEVICE : DMA_FROM_DEVICE;
1331
1332 dma_sync_single_for_cpu(dai->dev, fsi_dma_get_area(io, 0),
1333 samples_to_bytes(runtime, io->period_samples), dir);
1334
1335 io->buff_sample_pos += io->period_samples;
1336 io->period_pos++;
1337
1338 if (io->period_pos >= runtime->periods) {
1339 io->period_pos = 0;
1340 io->buff_sample_pos = 0;
1341 }
1342
1343 fsi_count_fifo_err(fsi);
1344 fsi_stream_transfer(io);
1345
1346 snd_pcm_period_elapsed(io->substream);
1347 }
1348
1349 static void fsi_dma_do_work(struct work_struct *work)
1350 {
1351 struct fsi_stream *io = container_of(work, struct fsi_stream, work);
1352 struct fsi_priv *fsi = fsi_stream_to_priv(io);
1353 struct snd_soc_dai *dai;
1354 struct dma_async_tx_descriptor *desc;
1355 struct snd_pcm_runtime *runtime;
1356 enum dma_data_direction dir;
1357 int is_play = fsi_stream_is_play(fsi, io);
1358 int len, i;
1359 dma_addr_t buf;
1360
1361 if (!fsi_stream_is_working(fsi, io))
1362 return;
1363
1364 dai = fsi_get_dai(io->substream);
1365 runtime = io->substream->runtime;
1366 dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
1367 len = samples_to_bytes(runtime, io->period_samples);
1368
1369 for (i = 0; i < io->loop_cnt; i++) {
1370 buf = fsi_dma_get_area(io, io->additional_pos);
1371
1372 dma_sync_single_for_device(dai->dev, buf, len, dir);
1373
1374 desc = dmaengine_prep_slave_single(io->chan, buf, len, dir,
1375 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
1376 if (!desc) {
1377 dev_err(dai->dev, "dmaengine_prep_slave_sg() fail\n");
1378 return;
1379 }
1380
1381 desc->callback = fsi_dma_complete;
1382 desc->callback_param = io;
1383
1384 if (dmaengine_submit(desc) < 0) {
1385 dev_err(dai->dev, "tx_submit() fail\n");
1386 return;
1387 }
1388
1389 dma_async_issue_pending(io->chan);
1390
1391 io->additional_pos = 1;
1392 }
1393
1394 io->loop_cnt = 1;
1395
1396 /*
1397 * FIXME
1398 *
1399 * In DMAEngine case, codec and FSI cannot be started simultaneously
1400 * since FSI is using the scheduler work queue.
1401 * Therefore, in capture case, probably FSI FIFO will have got
1402 * overflow error in this point.
1403 * in that case, DMA cannot start transfer until error was cleared.
1404 */
1405 if (!is_play) {
1406 if (ERR_OVER & fsi_reg_read(fsi, DIFF_ST)) {
1407 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1408 fsi_reg_write(fsi, DIFF_ST, 0);
1409 }
1410 }
1411 }
1412
1413 static bool fsi_dma_filter(struct dma_chan *chan, void *param)
1414 {
1415 struct sh_dmae_slave *slave = param;
1416
1417 chan->private = slave;
1418
1419 return true;
1420 }
1421
1422 static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io)
1423 {
1424 schedule_work(&io->work);
1425
1426 return 0;
1427 }
1428
1429 static int fsi_dma_push_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1430 int start)
1431 {
1432 struct fsi_master *master = fsi_get_master(fsi);
1433 u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
1434 u32 enable = start ? DMA_ON : 0;
1435
1436 fsi_reg_mask_set(fsi, OUT_DMAC, DMA_ON, enable);
1437
1438 dmaengine_terminate_all(io->chan);
1439
1440 if (fsi_is_clk_master(fsi))
1441 fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
1442
1443 return 0;
1444 }
1445
1446 static int fsi_dma_probe(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev)
1447 {
1448 dma_cap_mask_t mask;
1449
1450 dma_cap_zero(mask);
1451 dma_cap_set(DMA_SLAVE, mask);
1452
1453 io->chan = dma_request_channel(mask, fsi_dma_filter, &io->slave);
1454 if (!io->chan) {
1455
1456 /* switch to PIO handler */
1457 if (fsi_stream_is_play(fsi, io))
1458 fsi->playback.handler = &fsi_pio_push_handler;
1459 else
1460 fsi->capture.handler = &fsi_pio_pop_handler;
1461
1462 dev_info(dev, "switch handler (dma => pio)\n");
1463
1464 /* probe again */
1465 return fsi_stream_probe(fsi, dev);
1466 }
1467
1468 INIT_WORK(&io->work, fsi_dma_do_work);
1469
1470 return 0;
1471 }
1472
1473 static int fsi_dma_remove(struct fsi_priv *fsi, struct fsi_stream *io)
1474 {
1475 cancel_work_sync(&io->work);
1476
1477 fsi_stream_stop(fsi, io);
1478
1479 if (io->chan)
1480 dma_release_channel(io->chan);
1481
1482 io->chan = NULL;
1483 return 0;
1484 }
1485
1486 static struct fsi_stream_handler fsi_dma_push_handler = {
1487 .init = fsi_dma_init,
1488 .quit = fsi_dma_quit,
1489 .probe = fsi_dma_probe,
1490 .transfer = fsi_dma_transfer,
1491 .remove = fsi_dma_remove,
1492 .start_stop = fsi_dma_push_start_stop,
1493 };
1494
1495 /*
1496 * dai ops
1497 */
1498 static void fsi_fifo_init(struct fsi_priv *fsi,
1499 struct fsi_stream *io,
1500 struct device *dev)
1501 {
1502 struct fsi_master *master = fsi_get_master(fsi);
1503 int is_play = fsi_stream_is_play(fsi, io);
1504 u32 shift, i;
1505 int frame_capa;
1506
1507 /* get on-chip RAM capacity */
1508 shift = fsi_master_read(master, FIFO_SZ);
1509 shift >>= fsi_get_port_shift(fsi, io);
1510 shift &= FIFO_SZ_MASK;
1511 frame_capa = 256 << shift;
1512 dev_dbg(dev, "fifo = %d words\n", frame_capa);
1513
1514 /*
1515 * The maximum number of sample data varies depending
1516 * on the number of channels selected for the format.
1517 *
1518 * FIFOs are used in 4-channel units in 3-channel mode
1519 * and in 8-channel units in 5- to 7-channel mode
1520 * meaning that more FIFOs than the required size of DPRAM
1521 * are used.
1522 *
1523 * ex) if 256 words of DP-RAM is connected
1524 * 1 channel: 256 (256 x 1 = 256)
1525 * 2 channels: 128 (128 x 2 = 256)
1526 * 3 channels: 64 ( 64 x 3 = 192)
1527 * 4 channels: 64 ( 64 x 4 = 256)
1528 * 5 channels: 32 ( 32 x 5 = 160)
1529 * 6 channels: 32 ( 32 x 6 = 192)
1530 * 7 channels: 32 ( 32 x 7 = 224)
1531 * 8 channels: 32 ( 32 x 8 = 256)
1532 */
1533 for (i = 1; i < fsi->chan_num; i <<= 1)
1534 frame_capa >>= 1;
1535 dev_dbg(dev, "%d channel %d store\n",
1536 fsi->chan_num, frame_capa);
1537
1538 io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa);
1539
1540 /*
1541 * set interrupt generation factor
1542 * clear FIFO
1543 */
1544 if (is_play) {
1545 fsi_reg_write(fsi, DOFF_CTL, IRQ_HALF);
1546 fsi_reg_mask_set(fsi, DOFF_CTL, FIFO_CLR, FIFO_CLR);
1547 } else {
1548 fsi_reg_write(fsi, DIFF_CTL, IRQ_HALF);
1549 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1550 }
1551 }
1552
1553 static int fsi_hw_startup(struct fsi_priv *fsi,
1554 struct fsi_stream *io,
1555 struct device *dev)
1556 {
1557 u32 data = 0;
1558
1559 /* clock setting */
1560 if (fsi_is_clk_master(fsi))
1561 data = DIMD | DOMD;
1562
1563 fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data);
1564
1565 /* clock inversion (CKG2) */
1566 data = 0;
1567 if (fsi->bit_clk_inv)
1568 data |= (1 << 0);
1569 if (fsi->lr_clk_inv)
1570 data |= (1 << 4);
1571 if (fsi_is_clk_master(fsi))
1572 data <<= 8;
1573 fsi_reg_write(fsi, CKG2, data);
1574
1575 /* spdif ? */
1576 if (fsi_is_spdif(fsi)) {
1577 fsi_spdif_clk_ctrl(fsi, 1);
1578 fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
1579 }
1580
1581 /*
1582 * get bus settings
1583 */
1584 data = 0;
1585 switch (io->sample_width) {
1586 case 2:
1587 data = BUSOP_GET(16, io->bus_option);
1588 break;
1589 case 4:
1590 data = BUSOP_GET(24, io->bus_option);
1591 break;
1592 }
1593 fsi_format_bus_setup(fsi, io, data, dev);
1594
1595 /* irq clear */
1596 fsi_irq_disable(fsi, io);
1597 fsi_irq_clear_status(fsi);
1598
1599 /* fifo init */
1600 fsi_fifo_init(fsi, io, dev);
1601
1602 /* start master clock */
1603 if (fsi_is_clk_master(fsi))
1604 return fsi_clk_enable(dev, fsi);
1605
1606 return 0;
1607 }
1608
1609 static int fsi_hw_shutdown(struct fsi_priv *fsi,
1610 struct device *dev)
1611 {
1612 /* stop master clock */
1613 if (fsi_is_clk_master(fsi))
1614 return fsi_clk_disable(dev, fsi);
1615
1616 return 0;
1617 }
1618
1619 static int fsi_dai_startup(struct snd_pcm_substream *substream,
1620 struct snd_soc_dai *dai)
1621 {
1622 struct fsi_priv *fsi = fsi_get_priv(substream);
1623
1624 fsi_clk_invalid(fsi);
1625
1626 return 0;
1627 }
1628
1629 static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
1630 struct snd_soc_dai *dai)
1631 {
1632 struct fsi_priv *fsi = fsi_get_priv(substream);
1633
1634 fsi_clk_invalid(fsi);
1635 }
1636
1637 static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
1638 struct snd_soc_dai *dai)
1639 {
1640 struct fsi_priv *fsi = fsi_get_priv(substream);
1641 struct fsi_stream *io = fsi_stream_get(fsi, substream);
1642 int ret = 0;
1643
1644 switch (cmd) {
1645 case SNDRV_PCM_TRIGGER_START:
1646 fsi_stream_init(fsi, io, substream);
1647 if (!ret)
1648 ret = fsi_hw_startup(fsi, io, dai->dev);
1649 if (!ret)
1650 ret = fsi_stream_transfer(io);
1651 if (!ret)
1652 fsi_stream_start(fsi, io);
1653 break;
1654 case SNDRV_PCM_TRIGGER_STOP:
1655 if (!ret)
1656 ret = fsi_hw_shutdown(fsi, dai->dev);
1657 fsi_stream_stop(fsi, io);
1658 fsi_stream_quit(fsi, io);
1659 break;
1660 }
1661
1662 return ret;
1663 }
1664
1665 static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt)
1666 {
1667 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1668 case SND_SOC_DAIFMT_I2S:
1669 fsi->fmt = CR_I2S;
1670 fsi->chan_num = 2;
1671 break;
1672 case SND_SOC_DAIFMT_LEFT_J:
1673 fsi->fmt = CR_PCM;
1674 fsi->chan_num = 2;
1675 break;
1676 default:
1677 return -EINVAL;
1678 }
1679
1680 return 0;
1681 }
1682
1683 static int fsi_set_fmt_spdif(struct fsi_priv *fsi)
1684 {
1685 struct fsi_master *master = fsi_get_master(fsi);
1686
1687 if (fsi_version(master) < 2)
1688 return -EINVAL;
1689
1690 fsi->fmt = CR_DTMD_SPDIF_PCM | CR_PCM;
1691 fsi->chan_num = 2;
1692
1693 return 0;
1694 }
1695
1696 static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1697 {
1698 struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai);
1699 int ret;
1700
1701 /* set master/slave audio interface */
1702 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1703 case SND_SOC_DAIFMT_CBM_CFM:
1704 fsi->clk_master = 1;
1705 break;
1706 case SND_SOC_DAIFMT_CBS_CFS:
1707 break;
1708 default:
1709 return -EINVAL;
1710 }
1711
1712 /* set clock inversion */
1713 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
1714 case SND_SOC_DAIFMT_NB_IF:
1715 fsi->bit_clk_inv = 0;
1716 fsi->lr_clk_inv = 1;
1717 break;
1718 case SND_SOC_DAIFMT_IB_NF:
1719 fsi->bit_clk_inv = 1;
1720 fsi->lr_clk_inv = 0;
1721 break;
1722 case SND_SOC_DAIFMT_IB_IF:
1723 fsi->bit_clk_inv = 1;
1724 fsi->lr_clk_inv = 1;
1725 break;
1726 case SND_SOC_DAIFMT_NB_NF:
1727 default:
1728 fsi->bit_clk_inv = 0;
1729 fsi->lr_clk_inv = 0;
1730 break;
1731 }
1732
1733 if (fsi_is_clk_master(fsi)) {
1734 if (fsi->clk_cpg)
1735 fsi_clk_init(dai->dev, fsi, 0, 1, 1,
1736 fsi_clk_set_rate_cpg);
1737 else
1738 fsi_clk_init(dai->dev, fsi, 1, 1, 0,
1739 fsi_clk_set_rate_external);
1740 }
1741
1742 /* set format */
1743 if (fsi_is_spdif(fsi))
1744 ret = fsi_set_fmt_spdif(fsi);
1745 else
1746 ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1747
1748 return ret;
1749 }
1750
1751 static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
1752 struct snd_pcm_hw_params *params,
1753 struct snd_soc_dai *dai)
1754 {
1755 struct fsi_priv *fsi = fsi_get_priv(substream);
1756
1757 if (fsi_is_clk_master(fsi))
1758 fsi_clk_valid(fsi, params_rate(params));
1759
1760 return 0;
1761 }
1762
1763 static const struct snd_soc_dai_ops fsi_dai_ops = {
1764 .startup = fsi_dai_startup,
1765 .shutdown = fsi_dai_shutdown,
1766 .trigger = fsi_dai_trigger,
1767 .set_fmt = fsi_dai_set_fmt,
1768 .hw_params = fsi_dai_hw_params,
1769 };
1770
1771 /*
1772 * pcm ops
1773 */
1774
1775 static struct snd_pcm_hardware fsi_pcm_hardware = {
1776 .info = SNDRV_PCM_INFO_INTERLEAVED |
1777 SNDRV_PCM_INFO_MMAP |
1778 SNDRV_PCM_INFO_MMAP_VALID |
1779 SNDRV_PCM_INFO_PAUSE,
1780 .formats = FSI_FMTS,
1781 .rates = FSI_RATES,
1782 .rate_min = 8000,
1783 .rate_max = 192000,
1784 .channels_min = 2,
1785 .channels_max = 2,
1786 .buffer_bytes_max = 64 * 1024,
1787 .period_bytes_min = 32,
1788 .period_bytes_max = 8192,
1789 .periods_min = 1,
1790 .periods_max = 32,
1791 .fifo_size = 256,
1792 };
1793
1794 static int fsi_pcm_open(struct snd_pcm_substream *substream)
1795 {
1796 struct snd_pcm_runtime *runtime = substream->runtime;
1797 int ret = 0;
1798
1799 snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware);
1800
1801 ret = snd_pcm_hw_constraint_integer(runtime,
1802 SNDRV_PCM_HW_PARAM_PERIODS);
1803
1804 return ret;
1805 }
1806
1807 static int fsi_hw_params(struct snd_pcm_substream *substream,
1808 struct snd_pcm_hw_params *hw_params)
1809 {
1810 return snd_pcm_lib_malloc_pages(substream,
1811 params_buffer_bytes(hw_params));
1812 }
1813
1814 static int fsi_hw_free(struct snd_pcm_substream *substream)
1815 {
1816 return snd_pcm_lib_free_pages(substream);
1817 }
1818
1819 static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
1820 {
1821 struct fsi_priv *fsi = fsi_get_priv(substream);
1822 struct fsi_stream *io = fsi_stream_get(fsi, substream);
1823
1824 return fsi_sample2frame(fsi, io->buff_sample_pos);
1825 }
1826
1827 static struct snd_pcm_ops fsi_pcm_ops = {
1828 .open = fsi_pcm_open,
1829 .ioctl = snd_pcm_lib_ioctl,
1830 .hw_params = fsi_hw_params,
1831 .hw_free = fsi_hw_free,
1832 .pointer = fsi_pointer,
1833 };
1834
1835 /*
1836 * snd_soc_platform
1837 */
1838
1839 #define PREALLOC_BUFFER (32 * 1024)
1840 #define PREALLOC_BUFFER_MAX (32 * 1024)
1841
1842 static void fsi_pcm_free(struct snd_pcm *pcm)
1843 {
1844 snd_pcm_lib_preallocate_free_for_all(pcm);
1845 }
1846
1847 static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd)
1848 {
1849 struct snd_pcm *pcm = rtd->pcm;
1850
1851 /*
1852 * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
1853 * in MMAP mode (i.e. aplay -M)
1854 */
1855 return snd_pcm_lib_preallocate_pages_for_all(
1856 pcm,
1857 SNDRV_DMA_TYPE_CONTINUOUS,
1858 snd_dma_continuous_data(GFP_KERNEL),
1859 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1860 }
1861
1862 /*
1863 * alsa struct
1864 */
1865
1866 static struct snd_soc_dai_driver fsi_soc_dai[] = {
1867 {
1868 .name = "fsia-dai",
1869 .playback = {
1870 .rates = FSI_RATES,
1871 .formats = FSI_FMTS,
1872 .channels_min = 2,
1873 .channels_max = 2,
1874 },
1875 .capture = {
1876 .rates = FSI_RATES,
1877 .formats = FSI_FMTS,
1878 .channels_min = 2,
1879 .channels_max = 2,
1880 },
1881 .ops = &fsi_dai_ops,
1882 },
1883 {
1884 .name = "fsib-dai",
1885 .playback = {
1886 .rates = FSI_RATES,
1887 .formats = FSI_FMTS,
1888 .channels_min = 2,
1889 .channels_max = 2,
1890 },
1891 .capture = {
1892 .rates = FSI_RATES,
1893 .formats = FSI_FMTS,
1894 .channels_min = 2,
1895 .channels_max = 2,
1896 },
1897 .ops = &fsi_dai_ops,
1898 },
1899 };
1900
1901 static struct snd_soc_platform_driver fsi_soc_platform = {
1902 .ops = &fsi_pcm_ops,
1903 .pcm_new = fsi_pcm_new,
1904 .pcm_free = fsi_pcm_free,
1905 };
1906
1907 static const struct snd_soc_component_driver fsi_soc_component = {
1908 .name = "fsi",
1909 };
1910
1911 /*
1912 * platform function
1913 */
1914 static void fsi_of_parse(char *name,
1915 struct device_node *np,
1916 struct sh_fsi_port_info *info,
1917 struct device *dev)
1918 {
1919 int i;
1920 char prop[128];
1921 unsigned long flags = 0;
1922 struct {
1923 char *name;
1924 unsigned int val;
1925 } of_parse_property[] = {
1926 { "spdif-connection", SH_FSI_FMT_SPDIF },
1927 { "stream-mode-support", SH_FSI_ENABLE_STREAM_MODE },
1928 { "use-internal-clock", SH_FSI_CLK_CPG },
1929 };
1930
1931 for (i = 0; i < ARRAY_SIZE(of_parse_property); i++) {
1932 sprintf(prop, "%s,%s", name, of_parse_property[i].name);
1933 if (of_get_property(np, prop, NULL))
1934 flags |= of_parse_property[i].val;
1935 }
1936 info->flags = flags;
1937
1938 dev_dbg(dev, "%s flags : %lx\n", name, info->flags);
1939 }
1940
1941 static void fsi_port_info_init(struct fsi_priv *fsi,
1942 struct sh_fsi_port_info *info)
1943 {
1944 if (info->flags & SH_FSI_FMT_SPDIF)
1945 fsi->spdif = 1;
1946
1947 if (info->flags & SH_FSI_CLK_CPG)
1948 fsi->clk_cpg = 1;
1949
1950 if (info->flags & SH_FSI_ENABLE_STREAM_MODE)
1951 fsi->enable_stream = 1;
1952 }
1953
1954 static void fsi_handler_init(struct fsi_priv *fsi,
1955 struct sh_fsi_port_info *info)
1956 {
1957 fsi->playback.handler = &fsi_pio_push_handler; /* default PIO */
1958 fsi->playback.priv = fsi;
1959 fsi->capture.handler = &fsi_pio_pop_handler; /* default PIO */
1960 fsi->capture.priv = fsi;
1961
1962 if (info->tx_id) {
1963 fsi->playback.slave.shdma_slave.slave_id = info->tx_id;
1964 fsi->playback.handler = &fsi_dma_push_handler;
1965 }
1966 }
1967
1968 static struct of_device_id fsi_of_match[];
1969 static int fsi_probe(struct platform_device *pdev)
1970 {
1971 struct fsi_master *master;
1972 struct device_node *np = pdev->dev.of_node;
1973 struct sh_fsi_platform_info info;
1974 const struct fsi_core *core;
1975 struct fsi_priv *fsi;
1976 struct resource *res;
1977 unsigned int irq;
1978 int ret;
1979
1980 memset(&info, 0, sizeof(info));
1981
1982 core = NULL;
1983 if (np) {
1984 const struct of_device_id *of_id;
1985
1986 of_id = of_match_device(fsi_of_match, &pdev->dev);
1987 if (of_id) {
1988 core = of_id->data;
1989 fsi_of_parse("fsia", np, &info.port_a, &pdev->dev);
1990 fsi_of_parse("fsib", np, &info.port_b, &pdev->dev);
1991 }
1992 } else {
1993 const struct platform_device_id *id_entry = pdev->id_entry;
1994 if (id_entry)
1995 core = (struct fsi_core *)id_entry->driver_data;
1996
1997 if (pdev->dev.platform_data)
1998 memcpy(&info, pdev->dev.platform_data, sizeof(info));
1999 }
2000
2001 if (!core) {
2002 dev_err(&pdev->dev, "unknown fsi device\n");
2003 return -ENODEV;
2004 }
2005
2006 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2007 irq = platform_get_irq(pdev, 0);
2008 if (!res || (int)irq <= 0) {
2009 dev_err(&pdev->dev, "Not enough FSI platform resources.\n");
2010 return -ENODEV;
2011 }
2012
2013 master = devm_kzalloc(&pdev->dev, sizeof(*master), GFP_KERNEL);
2014 if (!master) {
2015 dev_err(&pdev->dev, "Could not allocate master\n");
2016 return -ENOMEM;
2017 }
2018
2019 master->base = devm_ioremap_nocache(&pdev->dev,
2020 res->start, resource_size(res));
2021 if (!master->base) {
2022 dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n");
2023 return -ENXIO;
2024 }
2025
2026 /* master setting */
2027 master->core = core;
2028 spin_lock_init(&master->lock);
2029
2030 /* FSI A setting */
2031 fsi = &master->fsia;
2032 fsi->base = master->base;
2033 fsi->master = master;
2034 fsi_port_info_init(fsi, &info.port_a);
2035 fsi_handler_init(fsi, &info.port_a);
2036 ret = fsi_stream_probe(fsi, &pdev->dev);
2037 if (ret < 0) {
2038 dev_err(&pdev->dev, "FSIA stream probe failed\n");
2039 return ret;
2040 }
2041
2042 /* FSI B setting */
2043 fsi = &master->fsib;
2044 fsi->base = master->base + 0x40;
2045 fsi->master = master;
2046 fsi_port_info_init(fsi, &info.port_b);
2047 fsi_handler_init(fsi, &info.port_b);
2048 ret = fsi_stream_probe(fsi, &pdev->dev);
2049 if (ret < 0) {
2050 dev_err(&pdev->dev, "FSIB stream probe failed\n");
2051 goto exit_fsia;
2052 }
2053
2054 pm_runtime_enable(&pdev->dev);
2055 dev_set_drvdata(&pdev->dev, master);
2056
2057 ret = devm_request_irq(&pdev->dev, irq, &fsi_interrupt, 0,
2058 dev_name(&pdev->dev), master);
2059 if (ret) {
2060 dev_err(&pdev->dev, "irq request err\n");
2061 goto exit_fsib;
2062 }
2063
2064 ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform);
2065 if (ret < 0) {
2066 dev_err(&pdev->dev, "cannot snd soc register\n");
2067 goto exit_fsib;
2068 }
2069
2070 ret = snd_soc_register_component(&pdev->dev, &fsi_soc_component,
2071 fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai));
2072 if (ret < 0) {
2073 dev_err(&pdev->dev, "cannot snd component register\n");
2074 goto exit_snd_soc;
2075 }
2076
2077 return ret;
2078
2079 exit_snd_soc:
2080 snd_soc_unregister_platform(&pdev->dev);
2081 exit_fsib:
2082 pm_runtime_disable(&pdev->dev);
2083 fsi_stream_remove(&master->fsib);
2084 exit_fsia:
2085 fsi_stream_remove(&master->fsia);
2086
2087 return ret;
2088 }
2089
2090 static int fsi_remove(struct platform_device *pdev)
2091 {
2092 struct fsi_master *master;
2093
2094 master = dev_get_drvdata(&pdev->dev);
2095
2096 pm_runtime_disable(&pdev->dev);
2097
2098 snd_soc_unregister_component(&pdev->dev);
2099 snd_soc_unregister_platform(&pdev->dev);
2100
2101 fsi_stream_remove(&master->fsia);
2102 fsi_stream_remove(&master->fsib);
2103
2104 return 0;
2105 }
2106
2107 static void __fsi_suspend(struct fsi_priv *fsi,
2108 struct fsi_stream *io,
2109 struct device *dev)
2110 {
2111 if (!fsi_stream_is_working(fsi, io))
2112 return;
2113
2114 fsi_stream_stop(fsi, io);
2115 fsi_hw_shutdown(fsi, dev);
2116 }
2117
2118 static void __fsi_resume(struct fsi_priv *fsi,
2119 struct fsi_stream *io,
2120 struct device *dev)
2121 {
2122 if (!fsi_stream_is_working(fsi, io))
2123 return;
2124
2125 fsi_hw_startup(fsi, io, dev);
2126 fsi_stream_start(fsi, io);
2127 }
2128
2129 static int fsi_suspend(struct device *dev)
2130 {
2131 struct fsi_master *master = dev_get_drvdata(dev);
2132 struct fsi_priv *fsia = &master->fsia;
2133 struct fsi_priv *fsib = &master->fsib;
2134
2135 __fsi_suspend(fsia, &fsia->playback, dev);
2136 __fsi_suspend(fsia, &fsia->capture, dev);
2137
2138 __fsi_suspend(fsib, &fsib->playback, dev);
2139 __fsi_suspend(fsib, &fsib->capture, dev);
2140
2141 return 0;
2142 }
2143
2144 static int fsi_resume(struct device *dev)
2145 {
2146 struct fsi_master *master = dev_get_drvdata(dev);
2147 struct fsi_priv *fsia = &master->fsia;
2148 struct fsi_priv *fsib = &master->fsib;
2149
2150 __fsi_resume(fsia, &fsia->playback, dev);
2151 __fsi_resume(fsia, &fsia->capture, dev);
2152
2153 __fsi_resume(fsib, &fsib->playback, dev);
2154 __fsi_resume(fsib, &fsib->capture, dev);
2155
2156 return 0;
2157 }
2158
2159 static struct dev_pm_ops fsi_pm_ops = {
2160 .suspend = fsi_suspend,
2161 .resume = fsi_resume,
2162 };
2163
2164 static struct fsi_core fsi1_core = {
2165 .ver = 1,
2166
2167 /* Interrupt */
2168 .int_st = INT_ST,
2169 .iemsk = IEMSK,
2170 .imsk = IMSK,
2171 };
2172
2173 static struct fsi_core fsi2_core = {
2174 .ver = 2,
2175
2176 /* Interrupt */
2177 .int_st = CPU_INT_ST,
2178 .iemsk = CPU_IEMSK,
2179 .imsk = CPU_IMSK,
2180 .a_mclk = A_MST_CTLR,
2181 .b_mclk = B_MST_CTLR,
2182 };
2183
2184 static struct of_device_id fsi_of_match[] = {
2185 { .compatible = "renesas,sh_fsi", .data = &fsi1_core},
2186 { .compatible = "renesas,sh_fsi2", .data = &fsi2_core},
2187 {},
2188 };
2189 MODULE_DEVICE_TABLE(of, fsi_of_match);
2190
2191 static struct platform_device_id fsi_id_table[] = {
2192 { "sh_fsi", (kernel_ulong_t)&fsi1_core },
2193 { "sh_fsi2", (kernel_ulong_t)&fsi2_core },
2194 {},
2195 };
2196 MODULE_DEVICE_TABLE(platform, fsi_id_table);
2197
2198 static struct platform_driver fsi_driver = {
2199 .driver = {
2200 .name = "fsi-pcm-audio",
2201 .pm = &fsi_pm_ops,
2202 .of_match_table = fsi_of_match,
2203 },
2204 .probe = fsi_probe,
2205 .remove = fsi_remove,
2206 .id_table = fsi_id_table,
2207 };
2208
2209 module_platform_driver(fsi_driver);
2210
2211 MODULE_LICENSE("GPL");
2212 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
2213 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
2214 MODULE_ALIAS("platform:fsi-pcm-audio");
Linus' kernel tree