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Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penber...
[deliverable/linux.git] / sound / soc / sh / fsi.c
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/scatterlist.h>
20 #include <linux/sh_dma.h>
21 #include <linux/slab.h>
22 #include <linux/module.h>
23 #include <sound/soc.h>
24 #include <sound/sh_fsi.h>
25
26 /* PortA/PortB register */
27 #define REG_DO_FMT 0x0000
28 #define REG_DOFF_CTL 0x0004
29 #define REG_DOFF_ST 0x0008
30 #define REG_DI_FMT 0x000C
31 #define REG_DIFF_CTL 0x0010
32 #define REG_DIFF_ST 0x0014
33 #define REG_CKG1 0x0018
34 #define REG_CKG2 0x001C
35 #define REG_DIDT 0x0020
36 #define REG_DODT 0x0024
37 #define REG_MUTE_ST 0x0028
38 #define REG_OUT_DMAC 0x002C
39 #define REG_OUT_SEL 0x0030
40 #define REG_IN_DMAC 0x0038
41
42 /* master register */
43 #define MST_CLK_RST 0x0210
44 #define MST_SOFT_RST 0x0214
45 #define MST_FIFO_SZ 0x0218
46
47 /* core register (depend on FSI version) */
48 #define A_MST_CTLR 0x0180
49 #define B_MST_CTLR 0x01A0
50 #define CPU_INT_ST 0x01F4
51 #define CPU_IEMSK 0x01F8
52 #define CPU_IMSK 0x01FC
53 #define INT_ST 0x0200
54 #define IEMSK 0x0204
55 #define IMSK 0x0208
56
57 /* DO_FMT */
58 /* DI_FMT */
59 #define CR_BWS_MASK (0x3 << 20) /* FSI2 */
60 #define CR_BWS_24 (0x0 << 20) /* FSI2 */
61 #define CR_BWS_16 (0x1 << 20) /* FSI2 */
62 #define CR_BWS_20 (0x2 << 20) /* FSI2 */
63
64 #define CR_DTMD_PCM (0x0 << 8) /* FSI2 */
65 #define CR_DTMD_SPDIF_PCM (0x1 << 8) /* FSI2 */
66 #define CR_DTMD_SPDIF_STREAM (0x2 << 8) /* FSI2 */
67
68 #define CR_MONO (0x0 << 4)
69 #define CR_MONO_D (0x1 << 4)
70 #define CR_PCM (0x2 << 4)
71 #define CR_I2S (0x3 << 4)
72 #define CR_TDM (0x4 << 4)
73 #define CR_TDM_D (0x5 << 4)
74
75 /* OUT_DMAC */
76 /* IN_DMAC */
77 #define VDMD_MASK (0x3 << 4)
78 #define VDMD_FRONT (0x0 << 4) /* Package in front */
79 #define VDMD_BACK (0x1 << 4) /* Package in back */
80 #define VDMD_STREAM (0x2 << 4) /* Stream mode(16bit * 2) */
81
82 #define DMA_ON (0x1 << 0)
83
84 /* DOFF_CTL */
85 /* DIFF_CTL */
86 #define IRQ_HALF 0x00100000
87 #define FIFO_CLR 0x00000001
88
89 /* DOFF_ST */
90 #define ERR_OVER 0x00000010
91 #define ERR_UNDER 0x00000001
92 #define ST_ERR (ERR_OVER | ERR_UNDER)
93
94 /* CKG1 */
95 #define ACKMD_MASK 0x00007000
96 #define BPFMD_MASK 0x00000700
97 #define DIMD (1 << 4)
98 #define DOMD (1 << 0)
99
100 /* A/B MST_CTLR */
101 #define BP (1 << 4) /* Fix the signal of Biphase output */
102 #define SE (1 << 0) /* Fix the master clock */
103
104 /* CLK_RST */
105 #define CRB (1 << 4)
106 #define CRA (1 << 0)
107
108 /* IO SHIFT / MACRO */
109 #define BI_SHIFT 12
110 #define BO_SHIFT 8
111 #define AI_SHIFT 4
112 #define AO_SHIFT 0
113 #define AB_IO(param, shift) (param << shift)
114
115 /* SOFT_RST */
116 #define PBSR (1 << 12) /* Port B Software Reset */
117 #define PASR (1 << 8) /* Port A Software Reset */
118 #define IR (1 << 4) /* Interrupt Reset */
119 #define FSISR (1 << 0) /* Software Reset */
120
121 /* OUT_SEL (FSI2) */
122 #define DMMD (1 << 4) /* SPDIF output timing 0: Biphase only */
123 /* 1: Biphase and serial */
124
125 /* FIFO_SZ */
126 #define FIFO_SZ_MASK 0x7
127
128 #define FSI_RATES SNDRV_PCM_RATE_8000_96000
129
130 #define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
131
132 typedef int (*set_rate_func)(struct device *dev, int rate, int enable);
133
134 /*
135 * FSI driver use below type name for variable
136 *
137 * xxx_num : number of data
138 * xxx_pos : position of data
139 * xxx_capa : capacity of data
140 */
141
142 /*
143 * period/frame/sample image
144 *
145 * ex) PCM (2ch)
146 *
147 * period pos period pos
148 * [n] [n + 1]
149 * |<-------------------- period--------------------->|
150 * ==|============================================ ... =|==
151 * | |
152 * ||<----- frame ----->|<------ frame ----->| ... |
153 * |+--------------------+--------------------+- ... |
154 * ||[ sample ][ sample ]|[ sample ][ sample ]| ... |
155 * |+--------------------+--------------------+- ... |
156 * ==|============================================ ... =|==
157 */
158
159 /*
160 * FSI FIFO image
161 *
162 * | |
163 * | |
164 * | [ sample ] |
165 * | [ sample ] |
166 * | [ sample ] |
167 * | [ sample ] |
168 * --> go to codecs
169 */
170
171 /*
172 * struct
173 */
174
175 struct fsi_stream_handler;
176 struct fsi_stream {
177
178 /*
179 * these are initialized by fsi_stream_init()
180 */
181 struct snd_pcm_substream *substream;
182 int fifo_sample_capa; /* sample capacity of FSI FIFO */
183 int buff_sample_capa; /* sample capacity of ALSA buffer */
184 int buff_sample_pos; /* sample position of ALSA buffer */
185 int period_samples; /* sample number / 1 period */
186 int period_pos; /* current period position */
187 int sample_width; /* sample width */
188 int uerr_num;
189 int oerr_num;
190
191 /*
192 * thse are initialized by fsi_handler_init()
193 */
194 struct fsi_stream_handler *handler;
195 struct fsi_priv *priv;
196
197 /*
198 * these are for DMAEngine
199 */
200 struct dma_chan *chan;
201 struct sh_dmae_slave slave; /* see fsi_handler_init() */
202 struct tasklet_struct tasklet;
203 dma_addr_t dma;
204 };
205
206 struct fsi_priv {
207 void __iomem *base;
208 struct fsi_master *master;
209 struct sh_fsi_port_info *info;
210
211 struct fsi_stream playback;
212 struct fsi_stream capture;
213
214 u32 do_fmt;
215 u32 di_fmt;
216
217 int chan_num:16;
218 int clk_master:1;
219 int spdif:1;
220
221 long rate;
222 };
223
224 struct fsi_stream_handler {
225 int (*init)(struct fsi_priv *fsi, struct fsi_stream *io);
226 int (*quit)(struct fsi_priv *fsi, struct fsi_stream *io);
227 int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io);
228 int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io);
229 int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io);
230 void (*start_stop)(struct fsi_priv *fsi, struct fsi_stream *io,
231 int enable);
232 };
233 #define fsi_stream_handler_call(io, func, args...) \
234 (!(io) ? -ENODEV : \
235 !((io)->handler->func) ? 0 : \
236 (io)->handler->func(args))
237
238 struct fsi_core {
239 int ver;
240
241 u32 int_st;
242 u32 iemsk;
243 u32 imsk;
244 u32 a_mclk;
245 u32 b_mclk;
246 };
247
248 struct fsi_master {
249 void __iomem *base;
250 int irq;
251 struct fsi_priv fsia;
252 struct fsi_priv fsib;
253 struct fsi_core *core;
254 spinlock_t lock;
255 };
256
257 static int fsi_stream_is_play(struct fsi_priv *fsi, struct fsi_stream *io);
258
259 /*
260 * basic read write function
261 */
262
263 static void __fsi_reg_write(u32 __iomem *reg, u32 data)
264 {
265 /* valid data area is 24bit */
266 data &= 0x00ffffff;
267
268 __raw_writel(data, reg);
269 }
270
271 static u32 __fsi_reg_read(u32 __iomem *reg)
272 {
273 return __raw_readl(reg);
274 }
275
276 static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
277 {
278 u32 val = __fsi_reg_read(reg);
279
280 val &= ~mask;
281 val |= data & mask;
282
283 __fsi_reg_write(reg, val);
284 }
285
286 #define fsi_reg_write(p, r, d)\
287 __fsi_reg_write((p->base + REG_##r), d)
288
289 #define fsi_reg_read(p, r)\
290 __fsi_reg_read((p->base + REG_##r))
291
292 #define fsi_reg_mask_set(p, r, m, d)\
293 __fsi_reg_mask_set((p->base + REG_##r), m, d)
294
295 #define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
296 #define fsi_core_read(p, r) _fsi_master_read(p, p->core->r)
297 static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
298 {
299 u32 ret;
300 unsigned long flags;
301
302 spin_lock_irqsave(&master->lock, flags);
303 ret = __fsi_reg_read(master->base + reg);
304 spin_unlock_irqrestore(&master->lock, flags);
305
306 return ret;
307 }
308
309 #define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
310 #define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d)
311 static void _fsi_master_mask_set(struct fsi_master *master,
312 u32 reg, u32 mask, u32 data)
313 {
314 unsigned long flags;
315
316 spin_lock_irqsave(&master->lock, flags);
317 __fsi_reg_mask_set(master->base + reg, mask, data);
318 spin_unlock_irqrestore(&master->lock, flags);
319 }
320
321 /*
322 * basic function
323 */
324
325 static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
326 {
327 return fsi->master;
328 }
329
330 static int fsi_is_clk_master(struct fsi_priv *fsi)
331 {
332 return fsi->clk_master;
333 }
334
335 static int fsi_is_port_a(struct fsi_priv *fsi)
336 {
337 return fsi->master->base == fsi->base;
338 }
339
340 static int fsi_is_spdif(struct fsi_priv *fsi)
341 {
342 return fsi->spdif;
343 }
344
345 static int fsi_is_play(struct snd_pcm_substream *substream)
346 {
347 return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
348 }
349
350 static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
351 {
352 struct snd_soc_pcm_runtime *rtd = substream->private_data;
353
354 return rtd->cpu_dai;
355 }
356
357 static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
358 {
359 struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
360
361 if (dai->id == 0)
362 return &master->fsia;
363 else
364 return &master->fsib;
365 }
366
367 static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
368 {
369 return fsi_get_priv_frm_dai(fsi_get_dai(substream));
370 }
371
372 static set_rate_func fsi_get_info_set_rate(struct fsi_priv *fsi)
373 {
374 if (!fsi->info)
375 return NULL;
376
377 return fsi->info->set_rate;
378 }
379
380 static u32 fsi_get_info_flags(struct fsi_priv *fsi)
381 {
382 if (!fsi->info)
383 return 0;
384
385 return fsi->info->flags;
386 }
387
388 static u32 fsi_get_port_shift(struct fsi_priv *fsi, struct fsi_stream *io)
389 {
390 int is_play = fsi_stream_is_play(fsi, io);
391 int is_porta = fsi_is_port_a(fsi);
392 u32 shift;
393
394 if (is_porta)
395 shift = is_play ? AO_SHIFT : AI_SHIFT;
396 else
397 shift = is_play ? BO_SHIFT : BI_SHIFT;
398
399 return shift;
400 }
401
402 static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
403 {
404 return frames * fsi->chan_num;
405 }
406
407 static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
408 {
409 return samples / fsi->chan_num;
410 }
411
412 static int fsi_get_current_fifo_samples(struct fsi_priv *fsi,
413 struct fsi_stream *io)
414 {
415 int is_play = fsi_stream_is_play(fsi, io);
416 u32 status;
417 int frames;
418
419 status = is_play ?
420 fsi_reg_read(fsi, DOFF_ST) :
421 fsi_reg_read(fsi, DIFF_ST);
422
423 frames = 0x1ff & (status >> 8);
424
425 return fsi_frame2sample(fsi, frames);
426 }
427
428 static void fsi_count_fifo_err(struct fsi_priv *fsi)
429 {
430 u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
431 u32 istatus = fsi_reg_read(fsi, DIFF_ST);
432
433 if (ostatus & ERR_OVER)
434 fsi->playback.oerr_num++;
435
436 if (ostatus & ERR_UNDER)
437 fsi->playback.uerr_num++;
438
439 if (istatus & ERR_OVER)
440 fsi->capture.oerr_num++;
441
442 if (istatus & ERR_UNDER)
443 fsi->capture.uerr_num++;
444
445 fsi_reg_write(fsi, DOFF_ST, 0);
446 fsi_reg_write(fsi, DIFF_ST, 0);
447 }
448
449 /*
450 * fsi_stream_xx() function
451 */
452 static inline int fsi_stream_is_play(struct fsi_priv *fsi,
453 struct fsi_stream *io)
454 {
455 return &fsi->playback == io;
456 }
457
458 static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi,
459 struct snd_pcm_substream *substream)
460 {
461 return fsi_is_play(substream) ? &fsi->playback : &fsi->capture;
462 }
463
464 static int fsi_stream_is_working(struct fsi_priv *fsi,
465 struct fsi_stream *io)
466 {
467 struct fsi_master *master = fsi_get_master(fsi);
468 unsigned long flags;
469 int ret;
470
471 spin_lock_irqsave(&master->lock, flags);
472 ret = !!(io->substream && io->substream->runtime);
473 spin_unlock_irqrestore(&master->lock, flags);
474
475 return ret;
476 }
477
478 static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io)
479 {
480 return io->priv;
481 }
482
483 static void fsi_stream_init(struct fsi_priv *fsi,
484 struct fsi_stream *io,
485 struct snd_pcm_substream *substream)
486 {
487 struct snd_pcm_runtime *runtime = substream->runtime;
488 struct fsi_master *master = fsi_get_master(fsi);
489 unsigned long flags;
490
491 spin_lock_irqsave(&master->lock, flags);
492 io->substream = substream;
493 io->buff_sample_capa = fsi_frame2sample(fsi, runtime->buffer_size);
494 io->buff_sample_pos = 0;
495 io->period_samples = fsi_frame2sample(fsi, runtime->period_size);
496 io->period_pos = 0;
497 io->sample_width = samples_to_bytes(runtime, 1);
498 io->oerr_num = -1; /* ignore 1st err */
499 io->uerr_num = -1; /* ignore 1st err */
500 fsi_stream_handler_call(io, init, fsi, io);
501 spin_unlock_irqrestore(&master->lock, flags);
502 }
503
504 static void fsi_stream_quit(struct fsi_priv *fsi, struct fsi_stream *io)
505 {
506 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
507 struct fsi_master *master = fsi_get_master(fsi);
508 unsigned long flags;
509
510 spin_lock_irqsave(&master->lock, flags);
511
512 if (io->oerr_num > 0)
513 dev_err(dai->dev, "over_run = %d\n", io->oerr_num);
514
515 if (io->uerr_num > 0)
516 dev_err(dai->dev, "under_run = %d\n", io->uerr_num);
517
518 fsi_stream_handler_call(io, quit, fsi, io);
519 io->substream = NULL;
520 io->buff_sample_capa = 0;
521 io->buff_sample_pos = 0;
522 io->period_samples = 0;
523 io->period_pos = 0;
524 io->sample_width = 0;
525 io->oerr_num = 0;
526 io->uerr_num = 0;
527 spin_unlock_irqrestore(&master->lock, flags);
528 }
529
530 static int fsi_stream_transfer(struct fsi_stream *io)
531 {
532 struct fsi_priv *fsi = fsi_stream_to_priv(io);
533 if (!fsi)
534 return -EIO;
535
536 return fsi_stream_handler_call(io, transfer, fsi, io);
537 }
538
539 #define fsi_stream_start(fsi, io)\
540 fsi_stream_handler_call(io, start_stop, fsi, io, 1)
541
542 #define fsi_stream_stop(fsi, io)\
543 fsi_stream_handler_call(io, start_stop, fsi, io, 0)
544
545 static int fsi_stream_probe(struct fsi_priv *fsi)
546 {
547 struct fsi_stream *io;
548 int ret1, ret2;
549
550 io = &fsi->playback;
551 ret1 = fsi_stream_handler_call(io, probe, fsi, io);
552
553 io = &fsi->capture;
554 ret2 = fsi_stream_handler_call(io, probe, fsi, io);
555
556 if (ret1 < 0)
557 return ret1;
558 if (ret2 < 0)
559 return ret2;
560
561 return 0;
562 }
563
564 static int fsi_stream_remove(struct fsi_priv *fsi)
565 {
566 struct fsi_stream *io;
567 int ret1, ret2;
568
569 io = &fsi->playback;
570 ret1 = fsi_stream_handler_call(io, remove, fsi, io);
571
572 io = &fsi->capture;
573 ret2 = fsi_stream_handler_call(io, remove, fsi, io);
574
575 if (ret1 < 0)
576 return ret1;
577 if (ret2 < 0)
578 return ret2;
579
580 return 0;
581 }
582
583 /*
584 * irq function
585 */
586
587 static void fsi_irq_enable(struct fsi_priv *fsi, struct fsi_stream *io)
588 {
589 u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
590 struct fsi_master *master = fsi_get_master(fsi);
591
592 fsi_core_mask_set(master, imsk, data, data);
593 fsi_core_mask_set(master, iemsk, data, data);
594 }
595
596 static void fsi_irq_disable(struct fsi_priv *fsi, struct fsi_stream *io)
597 {
598 u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
599 struct fsi_master *master = fsi_get_master(fsi);
600
601 fsi_core_mask_set(master, imsk, data, 0);
602 fsi_core_mask_set(master, iemsk, data, 0);
603 }
604
605 static u32 fsi_irq_get_status(struct fsi_master *master)
606 {
607 return fsi_core_read(master, int_st);
608 }
609
610 static void fsi_irq_clear_status(struct fsi_priv *fsi)
611 {
612 u32 data = 0;
613 struct fsi_master *master = fsi_get_master(fsi);
614
615 data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->playback));
616 data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->capture));
617
618 /* clear interrupt factor */
619 fsi_core_mask_set(master, int_st, data, 0);
620 }
621
622 /*
623 * SPDIF master clock function
624 *
625 * These functions are used later FSI2
626 */
627 static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
628 {
629 struct fsi_master *master = fsi_get_master(fsi);
630 u32 mask, val;
631
632 if (master->core->ver < 2) {
633 pr_err("fsi: register access err (%s)\n", __func__);
634 return;
635 }
636
637 mask = BP | SE;
638 val = enable ? mask : 0;
639
640 fsi_is_port_a(fsi) ?
641 fsi_core_mask_set(master, a_mclk, mask, val) :
642 fsi_core_mask_set(master, b_mclk, mask, val);
643 }
644
645 /*
646 * clock function
647 */
648 static int fsi_set_master_clk(struct device *dev, struct fsi_priv *fsi,
649 long rate, int enable)
650 {
651 struct fsi_master *master = fsi_get_master(fsi);
652 set_rate_func set_rate = fsi_get_info_set_rate(fsi);
653 int fsi_ver = master->core->ver;
654 int ret;
655
656 if (!set_rate)
657 return 0;
658
659 ret = set_rate(dev, rate, enable);
660 if (ret < 0) /* error */
661 return ret;
662
663 if (!enable)
664 return 0;
665
666 if (ret > 0) {
667 u32 data = 0;
668
669 switch (ret & SH_FSI_ACKMD_MASK) {
670 default:
671 /* FALL THROUGH */
672 case SH_FSI_ACKMD_512:
673 data |= (0x0 << 12);
674 break;
675 case SH_FSI_ACKMD_256:
676 data |= (0x1 << 12);
677 break;
678 case SH_FSI_ACKMD_128:
679 data |= (0x2 << 12);
680 break;
681 case SH_FSI_ACKMD_64:
682 data |= (0x3 << 12);
683 break;
684 case SH_FSI_ACKMD_32:
685 if (fsi_ver < 2)
686 dev_err(dev, "unsupported ACKMD\n");
687 else
688 data |= (0x4 << 12);
689 break;
690 }
691
692 switch (ret & SH_FSI_BPFMD_MASK) {
693 default:
694 /* FALL THROUGH */
695 case SH_FSI_BPFMD_32:
696 data |= (0x0 << 8);
697 break;
698 case SH_FSI_BPFMD_64:
699 data |= (0x1 << 8);
700 break;
701 case SH_FSI_BPFMD_128:
702 data |= (0x2 << 8);
703 break;
704 case SH_FSI_BPFMD_256:
705 data |= (0x3 << 8);
706 break;
707 case SH_FSI_BPFMD_512:
708 data |= (0x4 << 8);
709 break;
710 case SH_FSI_BPFMD_16:
711 if (fsi_ver < 2)
712 dev_err(dev, "unsupported ACKMD\n");
713 else
714 data |= (0x7 << 8);
715 break;
716 }
717
718 fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
719 udelay(10);
720 ret = 0;
721 }
722
723 return ret;
724 }
725
726 /*
727 * pio data transfer handler
728 */
729 static void fsi_pio_push16(struct fsi_priv *fsi, u8 *_buf, int samples)
730 {
731 u16 *buf = (u16 *)_buf;
732 int i;
733
734 for (i = 0; i < samples; i++)
735 fsi_reg_write(fsi, DODT, ((u32)*(buf + i) << 8));
736 }
737
738 static void fsi_pio_pop16(struct fsi_priv *fsi, u8 *_buf, int samples)
739 {
740 u16 *buf = (u16 *)_buf;
741 int i;
742
743 for (i = 0; i < samples; i++)
744 *(buf + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
745 }
746
747 static void fsi_pio_push32(struct fsi_priv *fsi, u8 *_buf, int samples)
748 {
749 u32 *buf = (u32 *)_buf;
750 int i;
751
752 for (i = 0; i < samples; i++)
753 fsi_reg_write(fsi, DODT, *(buf + i));
754 }
755
756 static void fsi_pio_pop32(struct fsi_priv *fsi, u8 *_buf, int samples)
757 {
758 u32 *buf = (u32 *)_buf;
759 int i;
760
761 for (i = 0; i < samples; i++)
762 *(buf + i) = fsi_reg_read(fsi, DIDT);
763 }
764
765 static u8 *fsi_pio_get_area(struct fsi_priv *fsi, struct fsi_stream *io)
766 {
767 struct snd_pcm_runtime *runtime = io->substream->runtime;
768
769 return runtime->dma_area +
770 samples_to_bytes(runtime, io->buff_sample_pos);
771 }
772
773 static int fsi_pio_transfer(struct fsi_priv *fsi, struct fsi_stream *io,
774 void (*run16)(struct fsi_priv *fsi, u8 *buf, int samples),
775 void (*run32)(struct fsi_priv *fsi, u8 *buf, int samples),
776 int samples)
777 {
778 struct snd_pcm_runtime *runtime;
779 struct snd_pcm_substream *substream;
780 u8 *buf;
781 int over_period;
782
783 if (!fsi_stream_is_working(fsi, io))
784 return -EINVAL;
785
786 over_period = 0;
787 substream = io->substream;
788 runtime = substream->runtime;
789
790 /* FSI FIFO has limit.
791 * So, this driver can not send periods data at a time
792 */
793 if (io->buff_sample_pos >=
794 io->period_samples * (io->period_pos + 1)) {
795
796 over_period = 1;
797 io->period_pos = (io->period_pos + 1) % runtime->periods;
798
799 if (0 == io->period_pos)
800 io->buff_sample_pos = 0;
801 }
802
803 buf = fsi_pio_get_area(fsi, io);
804
805 switch (io->sample_width) {
806 case 2:
807 run16(fsi, buf, samples);
808 break;
809 case 4:
810 run32(fsi, buf, samples);
811 break;
812 default:
813 return -EINVAL;
814 }
815
816 /* update buff_sample_pos */
817 io->buff_sample_pos += samples;
818
819 if (over_period)
820 snd_pcm_period_elapsed(substream);
821
822 return 0;
823 }
824
825 static int fsi_pio_pop(struct fsi_priv *fsi, struct fsi_stream *io)
826 {
827 int sample_residues; /* samples in FSI fifo */
828 int sample_space; /* ALSA free samples space */
829 int samples;
830
831 sample_residues = fsi_get_current_fifo_samples(fsi, io);
832 sample_space = io->buff_sample_capa - io->buff_sample_pos;
833
834 samples = min(sample_residues, sample_space);
835
836 return fsi_pio_transfer(fsi, io,
837 fsi_pio_pop16,
838 fsi_pio_pop32,
839 samples);
840 }
841
842 static int fsi_pio_push(struct fsi_priv *fsi, struct fsi_stream *io)
843 {
844 int sample_residues; /* ALSA residue samples */
845 int sample_space; /* FSI fifo free samples space */
846 int samples;
847
848 sample_residues = io->buff_sample_capa - io->buff_sample_pos;
849 sample_space = io->fifo_sample_capa -
850 fsi_get_current_fifo_samples(fsi, io);
851
852 samples = min(sample_residues, sample_space);
853
854 return fsi_pio_transfer(fsi, io,
855 fsi_pio_push16,
856 fsi_pio_push32,
857 samples);
858 }
859
860 static void fsi_pio_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
861 int enable)
862 {
863 struct fsi_master *master = fsi_get_master(fsi);
864 u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
865
866 if (enable)
867 fsi_irq_enable(fsi, io);
868 else
869 fsi_irq_disable(fsi, io);
870
871 if (fsi_is_clk_master(fsi))
872 fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
873 }
874
875 static struct fsi_stream_handler fsi_pio_push_handler = {
876 .transfer = fsi_pio_push,
877 .start_stop = fsi_pio_start_stop,
878 };
879
880 static struct fsi_stream_handler fsi_pio_pop_handler = {
881 .transfer = fsi_pio_pop,
882 .start_stop = fsi_pio_start_stop,
883 };
884
885 static irqreturn_t fsi_interrupt(int irq, void *data)
886 {
887 struct fsi_master *master = data;
888 u32 int_st = fsi_irq_get_status(master);
889
890 /* clear irq status */
891 fsi_master_mask_set(master, SOFT_RST, IR, 0);
892 fsi_master_mask_set(master, SOFT_RST, IR, IR);
893
894 if (int_st & AB_IO(1, AO_SHIFT))
895 fsi_stream_transfer(&master->fsia.playback);
896 if (int_st & AB_IO(1, BO_SHIFT))
897 fsi_stream_transfer(&master->fsib.playback);
898 if (int_st & AB_IO(1, AI_SHIFT))
899 fsi_stream_transfer(&master->fsia.capture);
900 if (int_st & AB_IO(1, BI_SHIFT))
901 fsi_stream_transfer(&master->fsib.capture);
902
903 fsi_count_fifo_err(&master->fsia);
904 fsi_count_fifo_err(&master->fsib);
905
906 fsi_irq_clear_status(&master->fsia);
907 fsi_irq_clear_status(&master->fsib);
908
909 return IRQ_HANDLED;
910 }
911
912 /*
913 * dma data transfer handler
914 */
915 static int fsi_dma_init(struct fsi_priv *fsi, struct fsi_stream *io)
916 {
917 struct snd_pcm_runtime *runtime = io->substream->runtime;
918 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
919 enum dma_data_direction dir = fsi_stream_is_play(fsi, io) ?
920 DMA_TO_DEVICE : DMA_FROM_DEVICE;
921
922 io->dma = dma_map_single(dai->dev, runtime->dma_area,
923 snd_pcm_lib_buffer_bytes(io->substream), dir);
924 return 0;
925 }
926
927 static int fsi_dma_quit(struct fsi_priv *fsi, struct fsi_stream *io)
928 {
929 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
930 enum dma_data_direction dir = fsi_stream_is_play(fsi, io) ?
931 DMA_TO_DEVICE : DMA_FROM_DEVICE;
932
933 dma_unmap_single(dai->dev, io->dma,
934 snd_pcm_lib_buffer_bytes(io->substream), dir);
935 return 0;
936 }
937
938 static void fsi_dma_complete(void *data)
939 {
940 struct fsi_stream *io = (struct fsi_stream *)data;
941 struct fsi_priv *fsi = fsi_stream_to_priv(io);
942 struct snd_pcm_runtime *runtime = io->substream->runtime;
943 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
944 enum dma_data_direction dir = fsi_stream_is_play(fsi, io) ?
945 DMA_TO_DEVICE : DMA_FROM_DEVICE;
946
947 dma_sync_single_for_cpu(dai->dev, io->dma,
948 samples_to_bytes(runtime, io->period_samples), dir);
949
950 io->buff_sample_pos += io->period_samples;
951 io->period_pos++;
952
953 if (io->period_pos >= runtime->periods) {
954 io->period_pos = 0;
955 io->buff_sample_pos = 0;
956 }
957
958 fsi_count_fifo_err(fsi);
959 fsi_stream_transfer(io);
960
961 snd_pcm_period_elapsed(io->substream);
962 }
963
964 static dma_addr_t fsi_dma_get_area(struct fsi_stream *io)
965 {
966 struct snd_pcm_runtime *runtime = io->substream->runtime;
967
968 return io->dma + samples_to_bytes(runtime, io->buff_sample_pos);
969 }
970
971 static void fsi_dma_do_tasklet(unsigned long data)
972 {
973 struct fsi_stream *io = (struct fsi_stream *)data;
974 struct fsi_priv *fsi = fsi_stream_to_priv(io);
975 struct dma_chan *chan;
976 struct snd_soc_dai *dai;
977 struct dma_async_tx_descriptor *desc;
978 struct scatterlist sg;
979 struct snd_pcm_runtime *runtime;
980 enum dma_data_direction dir;
981 dma_cookie_t cookie;
982 int is_play = fsi_stream_is_play(fsi, io);
983 int len;
984 dma_addr_t buf;
985
986 if (!fsi_stream_is_working(fsi, io))
987 return;
988
989 dai = fsi_get_dai(io->substream);
990 chan = io->chan;
991 runtime = io->substream->runtime;
992 dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
993 len = samples_to_bytes(runtime, io->period_samples);
994 buf = fsi_dma_get_area(io);
995
996 dma_sync_single_for_device(dai->dev, io->dma, len, dir);
997
998 sg_init_table(&sg, 1);
999 sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf)),
1000 len , offset_in_page(buf));
1001 sg_dma_address(&sg) = buf;
1002 sg_dma_len(&sg) = len;
1003
1004 desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir,
1005 DMA_PREP_INTERRUPT |
1006 DMA_CTRL_ACK);
1007 if (!desc) {
1008 dev_err(dai->dev, "device_prep_slave_sg() fail\n");
1009 return;
1010 }
1011
1012 desc->callback = fsi_dma_complete;
1013 desc->callback_param = io;
1014
1015 cookie = desc->tx_submit(desc);
1016 if (cookie < 0) {
1017 dev_err(dai->dev, "tx_submit() fail\n");
1018 return;
1019 }
1020
1021 dma_async_issue_pending(chan);
1022
1023 /*
1024 * FIXME
1025 *
1026 * In DMAEngine case, codec and FSI cannot be started simultaneously
1027 * since FSI is using tasklet.
1028 * Therefore, in capture case, probably FSI FIFO will have got
1029 * overflow error in this point.
1030 * in that case, DMA cannot start transfer until error was cleared.
1031 */
1032 if (!is_play) {
1033 if (ERR_OVER & fsi_reg_read(fsi, DIFF_ST)) {
1034 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1035 fsi_reg_write(fsi, DIFF_ST, 0);
1036 }
1037 }
1038 }
1039
1040 static bool fsi_dma_filter(struct dma_chan *chan, void *param)
1041 {
1042 struct sh_dmae_slave *slave = param;
1043
1044 chan->private = slave;
1045
1046 return true;
1047 }
1048
1049 static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io)
1050 {
1051 tasklet_schedule(&io->tasklet);
1052
1053 return 0;
1054 }
1055
1056 static void fsi_dma_push_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1057 int start)
1058 {
1059 u32 bws;
1060 u32 dma;
1061
1062 switch (io->sample_width * start) {
1063 case 2:
1064 bws = CR_BWS_16;
1065 dma = VDMD_STREAM | DMA_ON;
1066 break;
1067 case 4:
1068 bws = CR_BWS_24;
1069 dma = VDMD_BACK | DMA_ON;
1070 break;
1071 default:
1072 bws = 0;
1073 dma = 0;
1074 }
1075
1076 fsi_reg_mask_set(fsi, DO_FMT, CR_BWS_MASK, bws);
1077 fsi_reg_write(fsi, OUT_DMAC, dma);
1078 }
1079
1080 static int fsi_dma_probe(struct fsi_priv *fsi, struct fsi_stream *io)
1081 {
1082 dma_cap_mask_t mask;
1083
1084 dma_cap_zero(mask);
1085 dma_cap_set(DMA_SLAVE, mask);
1086
1087 io->chan = dma_request_channel(mask, fsi_dma_filter, &io->slave);
1088 if (!io->chan)
1089 return -EIO;
1090
1091 tasklet_init(&io->tasklet, fsi_dma_do_tasklet, (unsigned long)io);
1092
1093 return 0;
1094 }
1095
1096 static int fsi_dma_remove(struct fsi_priv *fsi, struct fsi_stream *io)
1097 {
1098 tasklet_kill(&io->tasklet);
1099
1100 fsi_stream_stop(fsi, io);
1101
1102 if (io->chan)
1103 dma_release_channel(io->chan);
1104
1105 io->chan = NULL;
1106 return 0;
1107 }
1108
1109 static struct fsi_stream_handler fsi_dma_push_handler = {
1110 .init = fsi_dma_init,
1111 .quit = fsi_dma_quit,
1112 .probe = fsi_dma_probe,
1113 .transfer = fsi_dma_transfer,
1114 .remove = fsi_dma_remove,
1115 .start_stop = fsi_dma_push_start_stop,
1116 };
1117
1118 /*
1119 * dai ops
1120 */
1121 static void fsi_fifo_init(struct fsi_priv *fsi,
1122 struct fsi_stream *io,
1123 struct device *dev)
1124 {
1125 struct fsi_master *master = fsi_get_master(fsi);
1126 int is_play = fsi_stream_is_play(fsi, io);
1127 u32 shift, i;
1128 int frame_capa;
1129
1130 /* get on-chip RAM capacity */
1131 shift = fsi_master_read(master, FIFO_SZ);
1132 shift >>= fsi_get_port_shift(fsi, io);
1133 shift &= FIFO_SZ_MASK;
1134 frame_capa = 256 << shift;
1135 dev_dbg(dev, "fifo = %d words\n", frame_capa);
1136
1137 /*
1138 * The maximum number of sample data varies depending
1139 * on the number of channels selected for the format.
1140 *
1141 * FIFOs are used in 4-channel units in 3-channel mode
1142 * and in 8-channel units in 5- to 7-channel mode
1143 * meaning that more FIFOs than the required size of DPRAM
1144 * are used.
1145 *
1146 * ex) if 256 words of DP-RAM is connected
1147 * 1 channel: 256 (256 x 1 = 256)
1148 * 2 channels: 128 (128 x 2 = 256)
1149 * 3 channels: 64 ( 64 x 3 = 192)
1150 * 4 channels: 64 ( 64 x 4 = 256)
1151 * 5 channels: 32 ( 32 x 5 = 160)
1152 * 6 channels: 32 ( 32 x 6 = 192)
1153 * 7 channels: 32 ( 32 x 7 = 224)
1154 * 8 channels: 32 ( 32 x 8 = 256)
1155 */
1156 for (i = 1; i < fsi->chan_num; i <<= 1)
1157 frame_capa >>= 1;
1158 dev_dbg(dev, "%d channel %d store\n",
1159 fsi->chan_num, frame_capa);
1160
1161 io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa);
1162
1163 /*
1164 * set interrupt generation factor
1165 * clear FIFO
1166 */
1167 if (is_play) {
1168 fsi_reg_write(fsi, DOFF_CTL, IRQ_HALF);
1169 fsi_reg_mask_set(fsi, DOFF_CTL, FIFO_CLR, FIFO_CLR);
1170 } else {
1171 fsi_reg_write(fsi, DIFF_CTL, IRQ_HALF);
1172 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1173 }
1174 }
1175
1176 static int fsi_hw_startup(struct fsi_priv *fsi,
1177 struct fsi_stream *io,
1178 struct device *dev)
1179 {
1180 struct fsi_master *master = fsi_get_master(fsi);
1181 int fsi_ver = master->core->ver;
1182 u32 flags = fsi_get_info_flags(fsi);
1183 u32 data = 0;
1184
1185 /* clock setting */
1186 if (fsi_is_clk_master(fsi))
1187 data = DIMD | DOMD;
1188
1189 fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data);
1190
1191 /* clock inversion (CKG2) */
1192 data = 0;
1193 if (SH_FSI_LRM_INV & flags)
1194 data |= 1 << 12;
1195 if (SH_FSI_BRM_INV & flags)
1196 data |= 1 << 8;
1197 if (SH_FSI_LRS_INV & flags)
1198 data |= 1 << 4;
1199 if (SH_FSI_BRS_INV & flags)
1200 data |= 1 << 0;
1201
1202 fsi_reg_write(fsi, CKG2, data);
1203
1204 /* set format */
1205 fsi_reg_write(fsi, DO_FMT, fsi->do_fmt);
1206 fsi_reg_write(fsi, DI_FMT, fsi->di_fmt);
1207
1208 /* spdif ? */
1209 if (fsi_is_spdif(fsi)) {
1210 fsi_spdif_clk_ctrl(fsi, 1);
1211 fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
1212 }
1213
1214 /*
1215 * FIXME
1216 *
1217 * FSI driver assumed that data package is in-back.
1218 * FSI2 chip can select it.
1219 */
1220 if (fsi_ver >= 2) {
1221 fsi_reg_write(fsi, OUT_DMAC, (1 << 4));
1222 fsi_reg_write(fsi, IN_DMAC, (1 << 4));
1223 }
1224
1225 /* irq clear */
1226 fsi_irq_disable(fsi, io);
1227 fsi_irq_clear_status(fsi);
1228
1229 /* fifo init */
1230 fsi_fifo_init(fsi, io, dev);
1231
1232 return 0;
1233 }
1234
1235 static void fsi_hw_shutdown(struct fsi_priv *fsi,
1236 struct device *dev)
1237 {
1238 if (fsi_is_clk_master(fsi))
1239 fsi_set_master_clk(dev, fsi, fsi->rate, 0);
1240 }
1241
1242 static int fsi_dai_startup(struct snd_pcm_substream *substream,
1243 struct snd_soc_dai *dai)
1244 {
1245 struct fsi_priv *fsi = fsi_get_priv(substream);
1246
1247 return fsi_hw_startup(fsi, fsi_stream_get(fsi, substream), dai->dev);
1248 }
1249
1250 static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
1251 struct snd_soc_dai *dai)
1252 {
1253 struct fsi_priv *fsi = fsi_get_priv(substream);
1254
1255 fsi_hw_shutdown(fsi, dai->dev);
1256 fsi->rate = 0;
1257 }
1258
1259 static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
1260 struct snd_soc_dai *dai)
1261 {
1262 struct fsi_priv *fsi = fsi_get_priv(substream);
1263 struct fsi_stream *io = fsi_stream_get(fsi, substream);
1264 int ret = 0;
1265
1266 switch (cmd) {
1267 case SNDRV_PCM_TRIGGER_START:
1268 fsi_stream_init(fsi, io, substream);
1269 ret = fsi_stream_transfer(io);
1270 if (0 == ret)
1271 fsi_stream_start(fsi, io);
1272 break;
1273 case SNDRV_PCM_TRIGGER_STOP:
1274 fsi_stream_stop(fsi, io);
1275 fsi_stream_quit(fsi, io);
1276 break;
1277 }
1278
1279 return ret;
1280 }
1281
1282 static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt)
1283 {
1284 u32 data = 0;
1285
1286 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1287 case SND_SOC_DAIFMT_I2S:
1288 data = CR_I2S;
1289 fsi->chan_num = 2;
1290 break;
1291 case SND_SOC_DAIFMT_LEFT_J:
1292 data = CR_PCM;
1293 fsi->chan_num = 2;
1294 break;
1295 default:
1296 return -EINVAL;
1297 }
1298
1299 fsi->do_fmt = data;
1300 fsi->di_fmt = data;
1301
1302 return 0;
1303 }
1304
1305 static int fsi_set_fmt_spdif(struct fsi_priv *fsi)
1306 {
1307 struct fsi_master *master = fsi_get_master(fsi);
1308 u32 data = 0;
1309
1310 if (master->core->ver < 2)
1311 return -EINVAL;
1312
1313 data = CR_BWS_16 | CR_DTMD_SPDIF_PCM | CR_PCM;
1314 fsi->chan_num = 2;
1315 fsi->spdif = 1;
1316
1317 fsi->do_fmt = data;
1318 fsi->di_fmt = data;
1319
1320 return 0;
1321 }
1322
1323 static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1324 {
1325 struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai);
1326 set_rate_func set_rate = fsi_get_info_set_rate(fsi);
1327 u32 flags = fsi_get_info_flags(fsi);
1328 int ret;
1329
1330 /* set master/slave audio interface */
1331 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1332 case SND_SOC_DAIFMT_CBM_CFM:
1333 fsi->clk_master = 1;
1334 break;
1335 case SND_SOC_DAIFMT_CBS_CFS:
1336 break;
1337 default:
1338 return -EINVAL;
1339 }
1340
1341 if (fsi_is_clk_master(fsi) && !set_rate) {
1342 dev_err(dai->dev, "platform doesn't have set_rate\n");
1343 return -EINVAL;
1344 }
1345
1346 /* set format */
1347 switch (flags & SH_FSI_FMT_MASK) {
1348 case SH_FSI_FMT_DAI:
1349 ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1350 break;
1351 case SH_FSI_FMT_SPDIF:
1352 ret = fsi_set_fmt_spdif(fsi);
1353 break;
1354 default:
1355 ret = -EINVAL;
1356 }
1357
1358 return ret;
1359 }
1360
1361 static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
1362 struct snd_pcm_hw_params *params,
1363 struct snd_soc_dai *dai)
1364 {
1365 struct fsi_priv *fsi = fsi_get_priv(substream);
1366 long rate = params_rate(params);
1367 int ret;
1368
1369 if (!fsi_is_clk_master(fsi))
1370 return 0;
1371
1372 ret = fsi_set_master_clk(dai->dev, fsi, rate, 1);
1373 if (ret < 0)
1374 return ret;
1375
1376 fsi->rate = rate;
1377
1378 return ret;
1379 }
1380
1381 static const struct snd_soc_dai_ops fsi_dai_ops = {
1382 .startup = fsi_dai_startup,
1383 .shutdown = fsi_dai_shutdown,
1384 .trigger = fsi_dai_trigger,
1385 .set_fmt = fsi_dai_set_fmt,
1386 .hw_params = fsi_dai_hw_params,
1387 };
1388
1389 /*
1390 * pcm ops
1391 */
1392
1393 static struct snd_pcm_hardware fsi_pcm_hardware = {
1394 .info = SNDRV_PCM_INFO_INTERLEAVED |
1395 SNDRV_PCM_INFO_MMAP |
1396 SNDRV_PCM_INFO_MMAP_VALID |
1397 SNDRV_PCM_INFO_PAUSE,
1398 .formats = FSI_FMTS,
1399 .rates = FSI_RATES,
1400 .rate_min = 8000,
1401 .rate_max = 192000,
1402 .channels_min = 1,
1403 .channels_max = 2,
1404 .buffer_bytes_max = 64 * 1024,
1405 .period_bytes_min = 32,
1406 .period_bytes_max = 8192,
1407 .periods_min = 1,
1408 .periods_max = 32,
1409 .fifo_size = 256,
1410 };
1411
1412 static int fsi_pcm_open(struct snd_pcm_substream *substream)
1413 {
1414 struct snd_pcm_runtime *runtime = substream->runtime;
1415 int ret = 0;
1416
1417 snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware);
1418
1419 ret = snd_pcm_hw_constraint_integer(runtime,
1420 SNDRV_PCM_HW_PARAM_PERIODS);
1421
1422 return ret;
1423 }
1424
1425 static int fsi_hw_params(struct snd_pcm_substream *substream,
1426 struct snd_pcm_hw_params *hw_params)
1427 {
1428 return snd_pcm_lib_malloc_pages(substream,
1429 params_buffer_bytes(hw_params));
1430 }
1431
1432 static int fsi_hw_free(struct snd_pcm_substream *substream)
1433 {
1434 return snd_pcm_lib_free_pages(substream);
1435 }
1436
1437 static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
1438 {
1439 struct fsi_priv *fsi = fsi_get_priv(substream);
1440 struct fsi_stream *io = fsi_stream_get(fsi, substream);
1441
1442 return fsi_sample2frame(fsi, io->buff_sample_pos);
1443 }
1444
1445 static struct snd_pcm_ops fsi_pcm_ops = {
1446 .open = fsi_pcm_open,
1447 .ioctl = snd_pcm_lib_ioctl,
1448 .hw_params = fsi_hw_params,
1449 .hw_free = fsi_hw_free,
1450 .pointer = fsi_pointer,
1451 };
1452
1453 /*
1454 * snd_soc_platform
1455 */
1456
1457 #define PREALLOC_BUFFER (32 * 1024)
1458 #define PREALLOC_BUFFER_MAX (32 * 1024)
1459
1460 static void fsi_pcm_free(struct snd_pcm *pcm)
1461 {
1462 snd_pcm_lib_preallocate_free_for_all(pcm);
1463 }
1464
1465 static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd)
1466 {
1467 struct snd_pcm *pcm = rtd->pcm;
1468
1469 /*
1470 * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
1471 * in MMAP mode (i.e. aplay -M)
1472 */
1473 return snd_pcm_lib_preallocate_pages_for_all(
1474 pcm,
1475 SNDRV_DMA_TYPE_CONTINUOUS,
1476 snd_dma_continuous_data(GFP_KERNEL),
1477 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1478 }
1479
1480 /*
1481 * alsa struct
1482 */
1483
1484 static struct snd_soc_dai_driver fsi_soc_dai[] = {
1485 {
1486 .name = "fsia-dai",
1487 .playback = {
1488 .rates = FSI_RATES,
1489 .formats = FSI_FMTS,
1490 .channels_min = 1,
1491 .channels_max = 8,
1492 },
1493 .capture = {
1494 .rates = FSI_RATES,
1495 .formats = FSI_FMTS,
1496 .channels_min = 1,
1497 .channels_max = 8,
1498 },
1499 .ops = &fsi_dai_ops,
1500 },
1501 {
1502 .name = "fsib-dai",
1503 .playback = {
1504 .rates = FSI_RATES,
1505 .formats = FSI_FMTS,
1506 .channels_min = 1,
1507 .channels_max = 8,
1508 },
1509 .capture = {
1510 .rates = FSI_RATES,
1511 .formats = FSI_FMTS,
1512 .channels_min = 1,
1513 .channels_max = 8,
1514 },
1515 .ops = &fsi_dai_ops,
1516 },
1517 };
1518
1519 static struct snd_soc_platform_driver fsi_soc_platform = {
1520 .ops = &fsi_pcm_ops,
1521 .pcm_new = fsi_pcm_new,
1522 .pcm_free = fsi_pcm_free,
1523 };
1524
1525 /*
1526 * platform function
1527 */
1528 static void fsi_handler_init(struct fsi_priv *fsi)
1529 {
1530 fsi->playback.handler = &fsi_pio_push_handler; /* default PIO */
1531 fsi->playback.priv = fsi;
1532 fsi->capture.handler = &fsi_pio_pop_handler; /* default PIO */
1533 fsi->capture.priv = fsi;
1534
1535 if (fsi->info->tx_id) {
1536 fsi->playback.slave.slave_id = fsi->info->tx_id;
1537 fsi->playback.handler = &fsi_dma_push_handler;
1538 }
1539 }
1540
1541 static int fsi_probe(struct platform_device *pdev)
1542 {
1543 struct fsi_master *master;
1544 const struct platform_device_id *id_entry;
1545 struct sh_fsi_platform_info *info = pdev->dev.platform_data;
1546 struct resource *res;
1547 unsigned int irq;
1548 int ret;
1549
1550 id_entry = pdev->id_entry;
1551 if (!id_entry) {
1552 dev_err(&pdev->dev, "unknown fsi device\n");
1553 return -ENODEV;
1554 }
1555
1556 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1557 irq = platform_get_irq(pdev, 0);
1558 if (!res || (int)irq <= 0) {
1559 dev_err(&pdev->dev, "Not enough FSI platform resources.\n");
1560 ret = -ENODEV;
1561 goto exit;
1562 }
1563
1564 master = kzalloc(sizeof(*master), GFP_KERNEL);
1565 if (!master) {
1566 dev_err(&pdev->dev, "Could not allocate master\n");
1567 ret = -ENOMEM;
1568 goto exit;
1569 }
1570
1571 master->base = ioremap_nocache(res->start, resource_size(res));
1572 if (!master->base) {
1573 ret = -ENXIO;
1574 dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n");
1575 goto exit_kfree;
1576 }
1577
1578 /* master setting */
1579 master->irq = irq;
1580 master->core = (struct fsi_core *)id_entry->driver_data;
1581 spin_lock_init(&master->lock);
1582
1583 /* FSI A setting */
1584 master->fsia.base = master->base;
1585 master->fsia.master = master;
1586 master->fsia.info = &info->port_a;
1587 fsi_handler_init(&master->fsia);
1588 ret = fsi_stream_probe(&master->fsia);
1589 if (ret < 0) {
1590 dev_err(&pdev->dev, "FSIA stream probe failed\n");
1591 goto exit_iounmap;
1592 }
1593
1594 /* FSI B setting */
1595 master->fsib.base = master->base + 0x40;
1596 master->fsib.master = master;
1597 master->fsib.info = &info->port_b;
1598 fsi_handler_init(&master->fsib);
1599 ret = fsi_stream_probe(&master->fsib);
1600 if (ret < 0) {
1601 dev_err(&pdev->dev, "FSIB stream probe failed\n");
1602 goto exit_fsia;
1603 }
1604
1605 pm_runtime_enable(&pdev->dev);
1606 dev_set_drvdata(&pdev->dev, master);
1607
1608 ret = request_irq(irq, &fsi_interrupt, 0,
1609 id_entry->name, master);
1610 if (ret) {
1611 dev_err(&pdev->dev, "irq request err\n");
1612 goto exit_fsib;
1613 }
1614
1615 ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform);
1616 if (ret < 0) {
1617 dev_err(&pdev->dev, "cannot snd soc register\n");
1618 goto exit_free_irq;
1619 }
1620
1621 ret = snd_soc_register_dais(&pdev->dev, fsi_soc_dai,
1622 ARRAY_SIZE(fsi_soc_dai));
1623 if (ret < 0) {
1624 dev_err(&pdev->dev, "cannot snd dai register\n");
1625 goto exit_snd_soc;
1626 }
1627
1628 return ret;
1629
1630 exit_snd_soc:
1631 snd_soc_unregister_platform(&pdev->dev);
1632 exit_free_irq:
1633 free_irq(irq, master);
1634 exit_fsib:
1635 fsi_stream_remove(&master->fsib);
1636 exit_fsia:
1637 fsi_stream_remove(&master->fsia);
1638 exit_iounmap:
1639 iounmap(master->base);
1640 pm_runtime_disable(&pdev->dev);
1641 exit_kfree:
1642 kfree(master);
1643 master = NULL;
1644 exit:
1645 return ret;
1646 }
1647
1648 static int fsi_remove(struct platform_device *pdev)
1649 {
1650 struct fsi_master *master;
1651
1652 master = dev_get_drvdata(&pdev->dev);
1653
1654 free_irq(master->irq, master);
1655 pm_runtime_disable(&pdev->dev);
1656
1657 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(fsi_soc_dai));
1658 snd_soc_unregister_platform(&pdev->dev);
1659
1660 fsi_stream_remove(&master->fsia);
1661 fsi_stream_remove(&master->fsib);
1662
1663 iounmap(master->base);
1664 kfree(master);
1665
1666 return 0;
1667 }
1668
1669 static void __fsi_suspend(struct fsi_priv *fsi,
1670 struct fsi_stream *io,
1671 struct device *dev)
1672 {
1673 if (!fsi_stream_is_working(fsi, io))
1674 return;
1675
1676 fsi_stream_stop(fsi, io);
1677 fsi_hw_shutdown(fsi, dev);
1678 }
1679
1680 static void __fsi_resume(struct fsi_priv *fsi,
1681 struct fsi_stream *io,
1682 struct device *dev)
1683 {
1684 if (!fsi_stream_is_working(fsi, io))
1685 return;
1686
1687 fsi_hw_startup(fsi, io, dev);
1688
1689 if (fsi_is_clk_master(fsi) && fsi->rate)
1690 fsi_set_master_clk(dev, fsi, fsi->rate, 1);
1691
1692 fsi_stream_start(fsi, io);
1693 }
1694
1695 static int fsi_suspend(struct device *dev)
1696 {
1697 struct fsi_master *master = dev_get_drvdata(dev);
1698 struct fsi_priv *fsia = &master->fsia;
1699 struct fsi_priv *fsib = &master->fsib;
1700
1701 __fsi_suspend(fsia, &fsia->playback, dev);
1702 __fsi_suspend(fsia, &fsia->capture, dev);
1703
1704 __fsi_suspend(fsib, &fsib->playback, dev);
1705 __fsi_suspend(fsib, &fsib->capture, dev);
1706
1707 return 0;
1708 }
1709
1710 static int fsi_resume(struct device *dev)
1711 {
1712 struct fsi_master *master = dev_get_drvdata(dev);
1713 struct fsi_priv *fsia = &master->fsia;
1714 struct fsi_priv *fsib = &master->fsib;
1715
1716 __fsi_resume(fsia, &fsia->playback, dev);
1717 __fsi_resume(fsia, &fsia->capture, dev);
1718
1719 __fsi_resume(fsib, &fsib->playback, dev);
1720 __fsi_resume(fsib, &fsib->capture, dev);
1721
1722 return 0;
1723 }
1724
1725 static struct dev_pm_ops fsi_pm_ops = {
1726 .suspend = fsi_suspend,
1727 .resume = fsi_resume,
1728 };
1729
1730 static struct fsi_core fsi1_core = {
1731 .ver = 1,
1732
1733 /* Interrupt */
1734 .int_st = INT_ST,
1735 .iemsk = IEMSK,
1736 .imsk = IMSK,
1737 };
1738
1739 static struct fsi_core fsi2_core = {
1740 .ver = 2,
1741
1742 /* Interrupt */
1743 .int_st = CPU_INT_ST,
1744 .iemsk = CPU_IEMSK,
1745 .imsk = CPU_IMSK,
1746 .a_mclk = A_MST_CTLR,
1747 .b_mclk = B_MST_CTLR,
1748 };
1749
1750 static struct platform_device_id fsi_id_table[] = {
1751 { "sh_fsi", (kernel_ulong_t)&fsi1_core },
1752 { "sh_fsi2", (kernel_ulong_t)&fsi2_core },
1753 {},
1754 };
1755 MODULE_DEVICE_TABLE(platform, fsi_id_table);
1756
1757 static struct platform_driver fsi_driver = {
1758 .driver = {
1759 .name = "fsi-pcm-audio",
1760 .pm = &fsi_pm_ops,
1761 },
1762 .probe = fsi_probe,
1763 .remove = fsi_remove,
1764 .id_table = fsi_id_table,
1765 };
1766
1767 module_platform_driver(fsi_driver);
1768
1769 MODULE_LICENSE("GPL");
1770 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
1771 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
1772 MODULE_ALIAS("platform:fsi-pcm-audio");
Linux kernel - Deliverables
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