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Merge tag 'kbuild-fixes-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masah...
[mirror_ubuntu-bionic-kernel.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/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 int dma_id;
236 };
237
238 struct fsi_clk {
239 /* see [FSI clock] */
240 struct clk *own;
241 struct clk *xck;
242 struct clk *ick;
243 struct clk *div;
244 int (*set_rate)(struct device *dev,
245 struct fsi_priv *fsi);
246
247 unsigned long rate;
248 unsigned int count;
249 };
250
251 struct fsi_priv {
252 void __iomem *base;
253 phys_addr_t phys;
254 struct fsi_master *master;
255
256 struct fsi_stream playback;
257 struct fsi_stream capture;
258
259 struct fsi_clk clock;
260
261 u32 fmt;
262
263 int chan_num:16;
264 unsigned int clk_master:1;
265 unsigned int clk_cpg:1;
266 unsigned int spdif:1;
267 unsigned int enable_stream:1;
268 unsigned int bit_clk_inv:1;
269 unsigned int lr_clk_inv:1;
270 };
271
272 struct fsi_stream_handler {
273 int (*init)(struct fsi_priv *fsi, struct fsi_stream *io);
274 int (*quit)(struct fsi_priv *fsi, struct fsi_stream *io);
275 int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev);
276 int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io);
277 int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io);
278 int (*start_stop)(struct fsi_priv *fsi, struct fsi_stream *io,
279 int enable);
280 };
281 #define fsi_stream_handler_call(io, func, args...) \
282 (!(io) ? -ENODEV : \
283 !((io)->handler->func) ? 0 : \
284 (io)->handler->func(args))
285
286 struct fsi_core {
287 int ver;
288
289 u32 int_st;
290 u32 iemsk;
291 u32 imsk;
292 u32 a_mclk;
293 u32 b_mclk;
294 };
295
296 struct fsi_master {
297 void __iomem *base;
298 struct fsi_priv fsia;
299 struct fsi_priv fsib;
300 const struct fsi_core *core;
301 spinlock_t lock;
302 };
303
304 static int fsi_stream_is_play(struct fsi_priv *fsi, struct fsi_stream *io);
305
306 /*
307 * basic read write function
308 */
309
310 static void __fsi_reg_write(u32 __iomem *reg, u32 data)
311 {
312 /* valid data area is 24bit */
313 data &= 0x00ffffff;
314
315 __raw_writel(data, reg);
316 }
317
318 static u32 __fsi_reg_read(u32 __iomem *reg)
319 {
320 return __raw_readl(reg);
321 }
322
323 static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
324 {
325 u32 val = __fsi_reg_read(reg);
326
327 val &= ~mask;
328 val |= data & mask;
329
330 __fsi_reg_write(reg, val);
331 }
332
333 #define fsi_reg_write(p, r, d)\
334 __fsi_reg_write((p->base + REG_##r), d)
335
336 #define fsi_reg_read(p, r)\
337 __fsi_reg_read((p->base + REG_##r))
338
339 #define fsi_reg_mask_set(p, r, m, d)\
340 __fsi_reg_mask_set((p->base + REG_##r), m, d)
341
342 #define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
343 #define fsi_core_read(p, r) _fsi_master_read(p, p->core->r)
344 static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
345 {
346 u32 ret;
347 unsigned long flags;
348
349 spin_lock_irqsave(&master->lock, flags);
350 ret = __fsi_reg_read(master->base + reg);
351 spin_unlock_irqrestore(&master->lock, flags);
352
353 return ret;
354 }
355
356 #define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
357 #define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d)
358 static void _fsi_master_mask_set(struct fsi_master *master,
359 u32 reg, u32 mask, u32 data)
360 {
361 unsigned long flags;
362
363 spin_lock_irqsave(&master->lock, flags);
364 __fsi_reg_mask_set(master->base + reg, mask, data);
365 spin_unlock_irqrestore(&master->lock, flags);
366 }
367
368 /*
369 * basic function
370 */
371 static int fsi_version(struct fsi_master *master)
372 {
373 return master->core->ver;
374 }
375
376 static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
377 {
378 return fsi->master;
379 }
380
381 static int fsi_is_clk_master(struct fsi_priv *fsi)
382 {
383 return fsi->clk_master;
384 }
385
386 static int fsi_is_port_a(struct fsi_priv *fsi)
387 {
388 return fsi->master->base == fsi->base;
389 }
390
391 static int fsi_is_spdif(struct fsi_priv *fsi)
392 {
393 return fsi->spdif;
394 }
395
396 static int fsi_is_enable_stream(struct fsi_priv *fsi)
397 {
398 return fsi->enable_stream;
399 }
400
401 static int fsi_is_play(struct snd_pcm_substream *substream)
402 {
403 return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
404 }
405
406 static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
407 {
408 struct snd_soc_pcm_runtime *rtd = substream->private_data;
409
410 return rtd->cpu_dai;
411 }
412
413 static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
414 {
415 struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
416
417 if (dai->id == 0)
418 return &master->fsia;
419 else
420 return &master->fsib;
421 }
422
423 static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
424 {
425 return fsi_get_priv_frm_dai(fsi_get_dai(substream));
426 }
427
428 static u32 fsi_get_port_shift(struct fsi_priv *fsi, struct fsi_stream *io)
429 {
430 int is_play = fsi_stream_is_play(fsi, io);
431 int is_porta = fsi_is_port_a(fsi);
432 u32 shift;
433
434 if (is_porta)
435 shift = is_play ? AO_SHIFT : AI_SHIFT;
436 else
437 shift = is_play ? BO_SHIFT : BI_SHIFT;
438
439 return shift;
440 }
441
442 static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
443 {
444 return frames * fsi->chan_num;
445 }
446
447 static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
448 {
449 return samples / fsi->chan_num;
450 }
451
452 static int fsi_get_current_fifo_samples(struct fsi_priv *fsi,
453 struct fsi_stream *io)
454 {
455 int is_play = fsi_stream_is_play(fsi, io);
456 u32 status;
457 int frames;
458
459 status = is_play ?
460 fsi_reg_read(fsi, DOFF_ST) :
461 fsi_reg_read(fsi, DIFF_ST);
462
463 frames = 0x1ff & (status >> 8);
464
465 return fsi_frame2sample(fsi, frames);
466 }
467
468 static void fsi_count_fifo_err(struct fsi_priv *fsi)
469 {
470 u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
471 u32 istatus = fsi_reg_read(fsi, DIFF_ST);
472
473 if (ostatus & ERR_OVER)
474 fsi->playback.oerr_num++;
475
476 if (ostatus & ERR_UNDER)
477 fsi->playback.uerr_num++;
478
479 if (istatus & ERR_OVER)
480 fsi->capture.oerr_num++;
481
482 if (istatus & ERR_UNDER)
483 fsi->capture.uerr_num++;
484
485 fsi_reg_write(fsi, DOFF_ST, 0);
486 fsi_reg_write(fsi, DIFF_ST, 0);
487 }
488
489 /*
490 * fsi_stream_xx() function
491 */
492 static inline int fsi_stream_is_play(struct fsi_priv *fsi,
493 struct fsi_stream *io)
494 {
495 return &fsi->playback == io;
496 }
497
498 static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi,
499 struct snd_pcm_substream *substream)
500 {
501 return fsi_is_play(substream) ? &fsi->playback : &fsi->capture;
502 }
503
504 static int fsi_stream_is_working(struct fsi_priv *fsi,
505 struct fsi_stream *io)
506 {
507 struct fsi_master *master = fsi_get_master(fsi);
508 unsigned long flags;
509 int ret;
510
511 spin_lock_irqsave(&master->lock, flags);
512 ret = !!(io->substream && io->substream->runtime);
513 spin_unlock_irqrestore(&master->lock, flags);
514
515 return ret;
516 }
517
518 static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io)
519 {
520 return io->priv;
521 }
522
523 static void fsi_stream_init(struct fsi_priv *fsi,
524 struct fsi_stream *io,
525 struct snd_pcm_substream *substream)
526 {
527 struct snd_pcm_runtime *runtime = substream->runtime;
528 struct fsi_master *master = fsi_get_master(fsi);
529 unsigned long flags;
530
531 spin_lock_irqsave(&master->lock, flags);
532 io->substream = substream;
533 io->buff_sample_capa = fsi_frame2sample(fsi, runtime->buffer_size);
534 io->buff_sample_pos = 0;
535 io->period_samples = fsi_frame2sample(fsi, runtime->period_size);
536 io->period_pos = 0;
537 io->sample_width = samples_to_bytes(runtime, 1);
538 io->bus_option = 0;
539 io->oerr_num = -1; /* ignore 1st err */
540 io->uerr_num = -1; /* ignore 1st err */
541 fsi_stream_handler_call(io, init, fsi, io);
542 spin_unlock_irqrestore(&master->lock, flags);
543 }
544
545 static void fsi_stream_quit(struct fsi_priv *fsi, struct fsi_stream *io)
546 {
547 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
548 struct fsi_master *master = fsi_get_master(fsi);
549 unsigned long flags;
550
551 spin_lock_irqsave(&master->lock, flags);
552
553 if (io->oerr_num > 0)
554 dev_err(dai->dev, "over_run = %d\n", io->oerr_num);
555
556 if (io->uerr_num > 0)
557 dev_err(dai->dev, "under_run = %d\n", io->uerr_num);
558
559 fsi_stream_handler_call(io, quit, fsi, io);
560 io->substream = NULL;
561 io->buff_sample_capa = 0;
562 io->buff_sample_pos = 0;
563 io->period_samples = 0;
564 io->period_pos = 0;
565 io->sample_width = 0;
566 io->bus_option = 0;
567 io->oerr_num = 0;
568 io->uerr_num = 0;
569 spin_unlock_irqrestore(&master->lock, flags);
570 }
571
572 static int fsi_stream_transfer(struct fsi_stream *io)
573 {
574 struct fsi_priv *fsi = fsi_stream_to_priv(io);
575 if (!fsi)
576 return -EIO;
577
578 return fsi_stream_handler_call(io, transfer, fsi, io);
579 }
580
581 #define fsi_stream_start(fsi, io)\
582 fsi_stream_handler_call(io, start_stop, fsi, io, 1)
583
584 #define fsi_stream_stop(fsi, io)\
585 fsi_stream_handler_call(io, start_stop, fsi, io, 0)
586
587 static int fsi_stream_probe(struct fsi_priv *fsi, struct device *dev)
588 {
589 struct fsi_stream *io;
590 int ret1, ret2;
591
592 io = &fsi->playback;
593 ret1 = fsi_stream_handler_call(io, probe, fsi, io, dev);
594
595 io = &fsi->capture;
596 ret2 = fsi_stream_handler_call(io, probe, fsi, io, dev);
597
598 if (ret1 < 0)
599 return ret1;
600 if (ret2 < 0)
601 return ret2;
602
603 return 0;
604 }
605
606 static int fsi_stream_remove(struct fsi_priv *fsi)
607 {
608 struct fsi_stream *io;
609 int ret1, ret2;
610
611 io = &fsi->playback;
612 ret1 = fsi_stream_handler_call(io, remove, fsi, io);
613
614 io = &fsi->capture;
615 ret2 = fsi_stream_handler_call(io, remove, fsi, io);
616
617 if (ret1 < 0)
618 return ret1;
619 if (ret2 < 0)
620 return ret2;
621
622 return 0;
623 }
624
625 /*
626 * format/bus/dma setting
627 */
628 static void fsi_format_bus_setup(struct fsi_priv *fsi, struct fsi_stream *io,
629 u32 bus, struct device *dev)
630 {
631 struct fsi_master *master = fsi_get_master(fsi);
632 int is_play = fsi_stream_is_play(fsi, io);
633 u32 fmt = fsi->fmt;
634
635 if (fsi_version(master) >= 2) {
636 u32 dma = 0;
637
638 /*
639 * FSI2 needs DMA/Bus setting
640 */
641 switch (bus) {
642 case PACKAGE_24BITBUS_FRONT:
643 fmt |= CR_BWS_24;
644 dma |= VDMD_FRONT;
645 dev_dbg(dev, "24bit bus / package in front\n");
646 break;
647 case PACKAGE_16BITBUS_STREAM:
648 fmt |= CR_BWS_16;
649 dma |= VDMD_STREAM;
650 dev_dbg(dev, "16bit bus / stream mode\n");
651 break;
652 case PACKAGE_24BITBUS_BACK:
653 default:
654 fmt |= CR_BWS_24;
655 dma |= VDMD_BACK;
656 dev_dbg(dev, "24bit bus / package in back\n");
657 break;
658 }
659
660 if (is_play)
661 fsi_reg_write(fsi, OUT_DMAC, dma);
662 else
663 fsi_reg_write(fsi, IN_DMAC, dma);
664 }
665
666 if (is_play)
667 fsi_reg_write(fsi, DO_FMT, fmt);
668 else
669 fsi_reg_write(fsi, DI_FMT, fmt);
670 }
671
672 /*
673 * irq function
674 */
675
676 static void fsi_irq_enable(struct fsi_priv *fsi, struct fsi_stream *io)
677 {
678 u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
679 struct fsi_master *master = fsi_get_master(fsi);
680
681 fsi_core_mask_set(master, imsk, data, data);
682 fsi_core_mask_set(master, iemsk, data, data);
683 }
684
685 static void fsi_irq_disable(struct fsi_priv *fsi, struct fsi_stream *io)
686 {
687 u32 data = AB_IO(1, fsi_get_port_shift(fsi, io));
688 struct fsi_master *master = fsi_get_master(fsi);
689
690 fsi_core_mask_set(master, imsk, data, 0);
691 fsi_core_mask_set(master, iemsk, data, 0);
692 }
693
694 static u32 fsi_irq_get_status(struct fsi_master *master)
695 {
696 return fsi_core_read(master, int_st);
697 }
698
699 static void fsi_irq_clear_status(struct fsi_priv *fsi)
700 {
701 u32 data = 0;
702 struct fsi_master *master = fsi_get_master(fsi);
703
704 data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->playback));
705 data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->capture));
706
707 /* clear interrupt factor */
708 fsi_core_mask_set(master, int_st, data, 0);
709 }
710
711 /*
712 * SPDIF master clock function
713 *
714 * These functions are used later FSI2
715 */
716 static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
717 {
718 struct fsi_master *master = fsi_get_master(fsi);
719 u32 mask, val;
720
721 mask = BP | SE;
722 val = enable ? mask : 0;
723
724 fsi_is_port_a(fsi) ?
725 fsi_core_mask_set(master, a_mclk, mask, val) :
726 fsi_core_mask_set(master, b_mclk, mask, val);
727 }
728
729 /*
730 * clock function
731 */
732 static int fsi_clk_init(struct device *dev,
733 struct fsi_priv *fsi,
734 int xck,
735 int ick,
736 int div,
737 int (*set_rate)(struct device *dev,
738 struct fsi_priv *fsi))
739 {
740 struct fsi_clk *clock = &fsi->clock;
741 int is_porta = fsi_is_port_a(fsi);
742
743 clock->xck = NULL;
744 clock->ick = NULL;
745 clock->div = NULL;
746 clock->rate = 0;
747 clock->count = 0;
748 clock->set_rate = set_rate;
749
750 clock->own = devm_clk_get(dev, NULL);
751 if (IS_ERR(clock->own))
752 return -EINVAL;
753
754 /* external clock */
755 if (xck) {
756 clock->xck = devm_clk_get(dev, is_porta ? "xcka" : "xckb");
757 if (IS_ERR(clock->xck)) {
758 dev_err(dev, "can't get xck clock\n");
759 return -EINVAL;
760 }
761 if (clock->xck == clock->own) {
762 dev_err(dev, "cpu doesn't support xck clock\n");
763 return -EINVAL;
764 }
765 }
766
767 /* FSIACLK/FSIBCLK */
768 if (ick) {
769 clock->ick = devm_clk_get(dev, is_porta ? "icka" : "ickb");
770 if (IS_ERR(clock->ick)) {
771 dev_err(dev, "can't get ick clock\n");
772 return -EINVAL;
773 }
774 if (clock->ick == clock->own) {
775 dev_err(dev, "cpu doesn't support ick clock\n");
776 return -EINVAL;
777 }
778 }
779
780 /* FSI-DIV */
781 if (div) {
782 clock->div = devm_clk_get(dev, is_porta ? "diva" : "divb");
783 if (IS_ERR(clock->div)) {
784 dev_err(dev, "can't get div clock\n");
785 return -EINVAL;
786 }
787 if (clock->div == clock->own) {
788 dev_err(dev, "cpu doens't support div clock\n");
789 return -EINVAL;
790 }
791 }
792
793 return 0;
794 }
795
796 #define fsi_clk_invalid(fsi) fsi_clk_valid(fsi, 0)
797 static void fsi_clk_valid(struct fsi_priv *fsi, unsigned long rate)
798 {
799 fsi->clock.rate = rate;
800 }
801
802 static int fsi_clk_is_valid(struct fsi_priv *fsi)
803 {
804 return fsi->clock.set_rate &&
805 fsi->clock.rate;
806 }
807
808 static int fsi_clk_enable(struct device *dev,
809 struct fsi_priv *fsi)
810 {
811 struct fsi_clk *clock = &fsi->clock;
812 int ret = -EINVAL;
813
814 if (!fsi_clk_is_valid(fsi))
815 return ret;
816
817 if (0 == clock->count) {
818 ret = clock->set_rate(dev, fsi);
819 if (ret < 0) {
820 fsi_clk_invalid(fsi);
821 return ret;
822 }
823
824 clk_enable(clock->xck);
825 clk_enable(clock->ick);
826 clk_enable(clock->div);
827
828 clock->count++;
829 }
830
831 return ret;
832 }
833
834 static int fsi_clk_disable(struct device *dev,
835 struct fsi_priv *fsi)
836 {
837 struct fsi_clk *clock = &fsi->clock;
838
839 if (!fsi_clk_is_valid(fsi))
840 return -EINVAL;
841
842 if (1 == clock->count--) {
843 clk_disable(clock->xck);
844 clk_disable(clock->ick);
845 clk_disable(clock->div);
846 }
847
848 return 0;
849 }
850
851 static int fsi_clk_set_ackbpf(struct device *dev,
852 struct fsi_priv *fsi,
853 int ackmd, int bpfmd)
854 {
855 u32 data = 0;
856
857 /* check ackmd/bpfmd relationship */
858 if (bpfmd > ackmd) {
859 dev_err(dev, "unsupported rate (%d/%d)\n", ackmd, bpfmd);
860 return -EINVAL;
861 }
862
863 /* ACKMD */
864 switch (ackmd) {
865 case 512:
866 data |= (0x0 << 12);
867 break;
868 case 256:
869 data |= (0x1 << 12);
870 break;
871 case 128:
872 data |= (0x2 << 12);
873 break;
874 case 64:
875 data |= (0x3 << 12);
876 break;
877 case 32:
878 data |= (0x4 << 12);
879 break;
880 default:
881 dev_err(dev, "unsupported ackmd (%d)\n", ackmd);
882 return -EINVAL;
883 }
884
885 /* BPFMD */
886 switch (bpfmd) {
887 case 32:
888 data |= (0x0 << 8);
889 break;
890 case 64:
891 data |= (0x1 << 8);
892 break;
893 case 128:
894 data |= (0x2 << 8);
895 break;
896 case 256:
897 data |= (0x3 << 8);
898 break;
899 case 512:
900 data |= (0x4 << 8);
901 break;
902 case 16:
903 data |= (0x7 << 8);
904 break;
905 default:
906 dev_err(dev, "unsupported bpfmd (%d)\n", bpfmd);
907 return -EINVAL;
908 }
909
910 dev_dbg(dev, "ACKMD/BPFMD = %d/%d\n", ackmd, bpfmd);
911
912 fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
913 udelay(10);
914
915 return 0;
916 }
917
918 static int fsi_clk_set_rate_external(struct device *dev,
919 struct fsi_priv *fsi)
920 {
921 struct clk *xck = fsi->clock.xck;
922 struct clk *ick = fsi->clock.ick;
923 unsigned long rate = fsi->clock.rate;
924 unsigned long xrate;
925 int ackmd, bpfmd;
926 int ret = 0;
927
928 /* check clock rate */
929 xrate = clk_get_rate(xck);
930 if (xrate % rate) {
931 dev_err(dev, "unsupported clock rate\n");
932 return -EINVAL;
933 }
934
935 clk_set_parent(ick, xck);
936 clk_set_rate(ick, xrate);
937
938 bpfmd = fsi->chan_num * 32;
939 ackmd = xrate / rate;
940
941 dev_dbg(dev, "external/rate = %ld/%ld\n", xrate, rate);
942
943 ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd);
944 if (ret < 0)
945 dev_err(dev, "%s failed", __func__);
946
947 return ret;
948 }
949
950 static int fsi_clk_set_rate_cpg(struct device *dev,
951 struct fsi_priv *fsi)
952 {
953 struct clk *ick = fsi->clock.ick;
954 struct clk *div = fsi->clock.div;
955 unsigned long rate = fsi->clock.rate;
956 unsigned long target = 0; /* 12288000 or 11289600 */
957 unsigned long actual, cout;
958 unsigned long diff, min;
959 unsigned long best_cout, best_act;
960 int adj;
961 int ackmd, bpfmd;
962 int ret = -EINVAL;
963
964 if (!(12288000 % rate))
965 target = 12288000;
966 if (!(11289600 % rate))
967 target = 11289600;
968 if (!target) {
969 dev_err(dev, "unsupported rate\n");
970 return ret;
971 }
972
973 bpfmd = fsi->chan_num * 32;
974 ackmd = target / rate;
975 ret = fsi_clk_set_ackbpf(dev, fsi, ackmd, bpfmd);
976 if (ret < 0) {
977 dev_err(dev, "%s failed", __func__);
978 return ret;
979 }
980
981 /*
982 * The clock flow is
983 *
984 * [CPG] = cout => [FSI_DIV] = audio => [FSI] => [codec]
985 *
986 * But, it needs to find best match of CPG and FSI_DIV
987 * combination, since it is difficult to generate correct
988 * frequency of audio clock from ick clock only.
989 * Because ick is created from its parent clock.
990 *
991 * target = rate x [512/256/128/64]fs
992 * cout = round(target x adjustment)
993 * actual = cout / adjustment (by FSI-DIV) ~= target
994 * audio = actual
995 */
996 min = ~0;
997 best_cout = 0;
998 best_act = 0;
999 for (adj = 1; adj < 0xffff; adj++) {
1000
1001 cout = target * adj;
1002 if (cout > 100000000) /* max clock = 100MHz */
1003 break;
1004
1005 /* cout/actual audio clock */
1006 cout = clk_round_rate(ick, cout);
1007 actual = cout / adj;
1008
1009 /* find best frequency */
1010 diff = abs(actual - target);
1011 if (diff < min) {
1012 min = diff;
1013 best_cout = cout;
1014 best_act = actual;
1015 }
1016 }
1017
1018 ret = clk_set_rate(ick, best_cout);
1019 if (ret < 0) {
1020 dev_err(dev, "ick clock failed\n");
1021 return -EIO;
1022 }
1023
1024 ret = clk_set_rate(div, clk_round_rate(div, best_act));
1025 if (ret < 0) {
1026 dev_err(dev, "div clock failed\n");
1027 return -EIO;
1028 }
1029
1030 dev_dbg(dev, "ick/div = %ld/%ld\n",
1031 clk_get_rate(ick), clk_get_rate(div));
1032
1033 return ret;
1034 }
1035
1036 static void fsi_pointer_update(struct fsi_stream *io, int size)
1037 {
1038 io->buff_sample_pos += size;
1039
1040 if (io->buff_sample_pos >=
1041 io->period_samples * (io->period_pos + 1)) {
1042 struct snd_pcm_substream *substream = io->substream;
1043 struct snd_pcm_runtime *runtime = substream->runtime;
1044
1045 io->period_pos++;
1046
1047 if (io->period_pos >= runtime->periods) {
1048 io->buff_sample_pos = 0;
1049 io->period_pos = 0;
1050 }
1051
1052 snd_pcm_period_elapsed(substream);
1053 }
1054 }
1055
1056 /*
1057 * pio data transfer handler
1058 */
1059 static void fsi_pio_push16(struct fsi_priv *fsi, u8 *_buf, int samples)
1060 {
1061 int i;
1062
1063 if (fsi_is_enable_stream(fsi)) {
1064 /*
1065 * stream mode
1066 * see
1067 * fsi_pio_push_init()
1068 */
1069 u32 *buf = (u32 *)_buf;
1070
1071 for (i = 0; i < samples / 2; i++)
1072 fsi_reg_write(fsi, DODT, buf[i]);
1073 } else {
1074 /* normal mode */
1075 u16 *buf = (u16 *)_buf;
1076
1077 for (i = 0; i < samples; i++)
1078 fsi_reg_write(fsi, DODT, ((u32)*(buf + i) << 8));
1079 }
1080 }
1081
1082 static void fsi_pio_pop16(struct fsi_priv *fsi, u8 *_buf, int samples)
1083 {
1084 u16 *buf = (u16 *)_buf;
1085 int i;
1086
1087 for (i = 0; i < samples; i++)
1088 *(buf + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
1089 }
1090
1091 static void fsi_pio_push32(struct fsi_priv *fsi, u8 *_buf, int samples)
1092 {
1093 u32 *buf = (u32 *)_buf;
1094 int i;
1095
1096 for (i = 0; i < samples; i++)
1097 fsi_reg_write(fsi, DODT, *(buf + i));
1098 }
1099
1100 static void fsi_pio_pop32(struct fsi_priv *fsi, u8 *_buf, int samples)
1101 {
1102 u32 *buf = (u32 *)_buf;
1103 int i;
1104
1105 for (i = 0; i < samples; i++)
1106 *(buf + i) = fsi_reg_read(fsi, DIDT);
1107 }
1108
1109 static u8 *fsi_pio_get_area(struct fsi_priv *fsi, struct fsi_stream *io)
1110 {
1111 struct snd_pcm_runtime *runtime = io->substream->runtime;
1112
1113 return runtime->dma_area +
1114 samples_to_bytes(runtime, io->buff_sample_pos);
1115 }
1116
1117 static int fsi_pio_transfer(struct fsi_priv *fsi, struct fsi_stream *io,
1118 void (*run16)(struct fsi_priv *fsi, u8 *buf, int samples),
1119 void (*run32)(struct fsi_priv *fsi, u8 *buf, int samples),
1120 int samples)
1121 {
1122 u8 *buf;
1123
1124 if (!fsi_stream_is_working(fsi, io))
1125 return -EINVAL;
1126
1127 buf = fsi_pio_get_area(fsi, io);
1128
1129 switch (io->sample_width) {
1130 case 2:
1131 run16(fsi, buf, samples);
1132 break;
1133 case 4:
1134 run32(fsi, buf, samples);
1135 break;
1136 default:
1137 return -EINVAL;
1138 }
1139
1140 fsi_pointer_update(io, samples);
1141
1142 return 0;
1143 }
1144
1145 static int fsi_pio_pop(struct fsi_priv *fsi, struct fsi_stream *io)
1146 {
1147 int sample_residues; /* samples in FSI fifo */
1148 int sample_space; /* ALSA free samples space */
1149 int samples;
1150
1151 sample_residues = fsi_get_current_fifo_samples(fsi, io);
1152 sample_space = io->buff_sample_capa - io->buff_sample_pos;
1153
1154 samples = min(sample_residues, sample_space);
1155
1156 return fsi_pio_transfer(fsi, io,
1157 fsi_pio_pop16,
1158 fsi_pio_pop32,
1159 samples);
1160 }
1161
1162 static int fsi_pio_push(struct fsi_priv *fsi, struct fsi_stream *io)
1163 {
1164 int sample_residues; /* ALSA residue samples */
1165 int sample_space; /* FSI fifo free samples space */
1166 int samples;
1167
1168 sample_residues = io->buff_sample_capa - io->buff_sample_pos;
1169 sample_space = io->fifo_sample_capa -
1170 fsi_get_current_fifo_samples(fsi, io);
1171
1172 samples = min(sample_residues, sample_space);
1173
1174 return fsi_pio_transfer(fsi, io,
1175 fsi_pio_push16,
1176 fsi_pio_push32,
1177 samples);
1178 }
1179
1180 static int fsi_pio_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1181 int enable)
1182 {
1183 struct fsi_master *master = fsi_get_master(fsi);
1184 u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
1185
1186 if (enable)
1187 fsi_irq_enable(fsi, io);
1188 else
1189 fsi_irq_disable(fsi, io);
1190
1191 if (fsi_is_clk_master(fsi))
1192 fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
1193
1194 return 0;
1195 }
1196
1197 static int fsi_pio_push_init(struct fsi_priv *fsi, struct fsi_stream *io)
1198 {
1199 /*
1200 * we can use 16bit stream mode
1201 * when "playback" and "16bit data"
1202 * and platform allows "stream mode"
1203 * see
1204 * fsi_pio_push16()
1205 */
1206 if (fsi_is_enable_stream(fsi))
1207 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1208 BUSOP_SET(16, PACKAGE_16BITBUS_STREAM);
1209 else
1210 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1211 BUSOP_SET(16, PACKAGE_24BITBUS_BACK);
1212 return 0;
1213 }
1214
1215 static int fsi_pio_pop_init(struct fsi_priv *fsi, struct fsi_stream *io)
1216 {
1217 /*
1218 * always 24bit bus, package back when "capture"
1219 */
1220 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1221 BUSOP_SET(16, PACKAGE_24BITBUS_BACK);
1222 return 0;
1223 }
1224
1225 static struct fsi_stream_handler fsi_pio_push_handler = {
1226 .init = fsi_pio_push_init,
1227 .transfer = fsi_pio_push,
1228 .start_stop = fsi_pio_start_stop,
1229 };
1230
1231 static struct fsi_stream_handler fsi_pio_pop_handler = {
1232 .init = fsi_pio_pop_init,
1233 .transfer = fsi_pio_pop,
1234 .start_stop = fsi_pio_start_stop,
1235 };
1236
1237 static irqreturn_t fsi_interrupt(int irq, void *data)
1238 {
1239 struct fsi_master *master = data;
1240 u32 int_st = fsi_irq_get_status(master);
1241
1242 /* clear irq status */
1243 fsi_master_mask_set(master, SOFT_RST, IR, 0);
1244 fsi_master_mask_set(master, SOFT_RST, IR, IR);
1245
1246 if (int_st & AB_IO(1, AO_SHIFT))
1247 fsi_stream_transfer(&master->fsia.playback);
1248 if (int_st & AB_IO(1, BO_SHIFT))
1249 fsi_stream_transfer(&master->fsib.playback);
1250 if (int_st & AB_IO(1, AI_SHIFT))
1251 fsi_stream_transfer(&master->fsia.capture);
1252 if (int_st & AB_IO(1, BI_SHIFT))
1253 fsi_stream_transfer(&master->fsib.capture);
1254
1255 fsi_count_fifo_err(&master->fsia);
1256 fsi_count_fifo_err(&master->fsib);
1257
1258 fsi_irq_clear_status(&master->fsia);
1259 fsi_irq_clear_status(&master->fsib);
1260
1261 return IRQ_HANDLED;
1262 }
1263
1264 /*
1265 * dma data transfer handler
1266 */
1267 static int fsi_dma_init(struct fsi_priv *fsi, struct fsi_stream *io)
1268 {
1269 /*
1270 * 24bit data : 24bit bus / package in back
1271 * 16bit data : 16bit bus / stream mode
1272 */
1273 io->bus_option = BUSOP_SET(24, PACKAGE_24BITBUS_BACK) |
1274 BUSOP_SET(16, PACKAGE_16BITBUS_STREAM);
1275
1276 return 0;
1277 }
1278
1279 static void fsi_dma_complete(void *data)
1280 {
1281 struct fsi_stream *io = (struct fsi_stream *)data;
1282 struct fsi_priv *fsi = fsi_stream_to_priv(io);
1283
1284 fsi_pointer_update(io, io->period_samples);
1285
1286 fsi_count_fifo_err(fsi);
1287 }
1288
1289 static int fsi_dma_transfer(struct fsi_priv *fsi, struct fsi_stream *io)
1290 {
1291 struct snd_soc_dai *dai = fsi_get_dai(io->substream);
1292 struct snd_pcm_substream *substream = io->substream;
1293 struct dma_async_tx_descriptor *desc;
1294 int is_play = fsi_stream_is_play(fsi, io);
1295 enum dma_transfer_direction dir;
1296 int ret = -EIO;
1297
1298 if (is_play)
1299 dir = DMA_MEM_TO_DEV;
1300 else
1301 dir = DMA_DEV_TO_MEM;
1302
1303 desc = dmaengine_prep_dma_cyclic(io->chan,
1304 substream->runtime->dma_addr,
1305 snd_pcm_lib_buffer_bytes(substream),
1306 snd_pcm_lib_period_bytes(substream),
1307 dir,
1308 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
1309 if (!desc) {
1310 dev_err(dai->dev, "dmaengine_prep_dma_cyclic() fail\n");
1311 goto fsi_dma_transfer_err;
1312 }
1313
1314 desc->callback = fsi_dma_complete;
1315 desc->callback_param = io;
1316
1317 if (dmaengine_submit(desc) < 0) {
1318 dev_err(dai->dev, "tx_submit() fail\n");
1319 goto fsi_dma_transfer_err;
1320 }
1321
1322 dma_async_issue_pending(io->chan);
1323
1324 /*
1325 * FIXME
1326 *
1327 * In DMAEngine case, codec and FSI cannot be started simultaneously
1328 * since FSI is using the scheduler work queue.
1329 * Therefore, in capture case, probably FSI FIFO will have got
1330 * overflow error in this point.
1331 * in that case, DMA cannot start transfer until error was cleared.
1332 */
1333 if (!is_play) {
1334 if (ERR_OVER & fsi_reg_read(fsi, DIFF_ST)) {
1335 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1336 fsi_reg_write(fsi, DIFF_ST, 0);
1337 }
1338 }
1339
1340 ret = 0;
1341
1342 fsi_dma_transfer_err:
1343 return ret;
1344 }
1345
1346 static int fsi_dma_push_start_stop(struct fsi_priv *fsi, struct fsi_stream *io,
1347 int start)
1348 {
1349 struct fsi_master *master = fsi_get_master(fsi);
1350 u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
1351 u32 enable = start ? DMA_ON : 0;
1352
1353 fsi_reg_mask_set(fsi, OUT_DMAC, DMA_ON, enable);
1354
1355 dmaengine_terminate_all(io->chan);
1356
1357 if (fsi_is_clk_master(fsi))
1358 fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
1359
1360 return 0;
1361 }
1362
1363 static int fsi_dma_probe(struct fsi_priv *fsi, struct fsi_stream *io, struct device *dev)
1364 {
1365 int is_play = fsi_stream_is_play(fsi, io);
1366
1367 #ifdef CONFIG_SUPERH
1368 dma_cap_mask_t mask;
1369 dma_cap_zero(mask);
1370 dma_cap_set(DMA_SLAVE, mask);
1371
1372 io->chan = dma_request_channel(mask, shdma_chan_filter,
1373 (void *)io->dma_id);
1374 #else
1375 io->chan = dma_request_slave_channel(dev, is_play ? "tx" : "rx");
1376 #endif
1377 if (io->chan) {
1378 struct dma_slave_config cfg = {};
1379 int ret;
1380
1381 if (is_play) {
1382 cfg.dst_addr = fsi->phys + REG_DODT;
1383 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1384 cfg.direction = DMA_MEM_TO_DEV;
1385 } else {
1386 cfg.src_addr = fsi->phys + REG_DIDT;
1387 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1388 cfg.direction = DMA_DEV_TO_MEM;
1389 }
1390
1391 ret = dmaengine_slave_config(io->chan, &cfg);
1392 if (ret < 0) {
1393 dma_release_channel(io->chan);
1394 io->chan = NULL;
1395 }
1396 }
1397
1398 if (!io->chan) {
1399
1400 /* switch to PIO handler */
1401 if (is_play)
1402 fsi->playback.handler = &fsi_pio_push_handler;
1403 else
1404 fsi->capture.handler = &fsi_pio_pop_handler;
1405
1406 dev_info(dev, "switch handler (dma => pio)\n");
1407
1408 /* probe again */
1409 return fsi_stream_probe(fsi, dev);
1410 }
1411
1412 return 0;
1413 }
1414
1415 static int fsi_dma_remove(struct fsi_priv *fsi, struct fsi_stream *io)
1416 {
1417 fsi_stream_stop(fsi, io);
1418
1419 if (io->chan)
1420 dma_release_channel(io->chan);
1421
1422 io->chan = NULL;
1423 return 0;
1424 }
1425
1426 static struct fsi_stream_handler fsi_dma_push_handler = {
1427 .init = fsi_dma_init,
1428 .probe = fsi_dma_probe,
1429 .transfer = fsi_dma_transfer,
1430 .remove = fsi_dma_remove,
1431 .start_stop = fsi_dma_push_start_stop,
1432 };
1433
1434 /*
1435 * dai ops
1436 */
1437 static void fsi_fifo_init(struct fsi_priv *fsi,
1438 struct fsi_stream *io,
1439 struct device *dev)
1440 {
1441 struct fsi_master *master = fsi_get_master(fsi);
1442 int is_play = fsi_stream_is_play(fsi, io);
1443 u32 shift, i;
1444 int frame_capa;
1445
1446 /* get on-chip RAM capacity */
1447 shift = fsi_master_read(master, FIFO_SZ);
1448 shift >>= fsi_get_port_shift(fsi, io);
1449 shift &= FIFO_SZ_MASK;
1450 frame_capa = 256 << shift;
1451 dev_dbg(dev, "fifo = %d words\n", frame_capa);
1452
1453 /*
1454 * The maximum number of sample data varies depending
1455 * on the number of channels selected for the format.
1456 *
1457 * FIFOs are used in 4-channel units in 3-channel mode
1458 * and in 8-channel units in 5- to 7-channel mode
1459 * meaning that more FIFOs than the required size of DPRAM
1460 * are used.
1461 *
1462 * ex) if 256 words of DP-RAM is connected
1463 * 1 channel: 256 (256 x 1 = 256)
1464 * 2 channels: 128 (128 x 2 = 256)
1465 * 3 channels: 64 ( 64 x 3 = 192)
1466 * 4 channels: 64 ( 64 x 4 = 256)
1467 * 5 channels: 32 ( 32 x 5 = 160)
1468 * 6 channels: 32 ( 32 x 6 = 192)
1469 * 7 channels: 32 ( 32 x 7 = 224)
1470 * 8 channels: 32 ( 32 x 8 = 256)
1471 */
1472 for (i = 1; i < fsi->chan_num; i <<= 1)
1473 frame_capa >>= 1;
1474 dev_dbg(dev, "%d channel %d store\n",
1475 fsi->chan_num, frame_capa);
1476
1477 io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa);
1478
1479 /*
1480 * set interrupt generation factor
1481 * clear FIFO
1482 */
1483 if (is_play) {
1484 fsi_reg_write(fsi, DOFF_CTL, IRQ_HALF);
1485 fsi_reg_mask_set(fsi, DOFF_CTL, FIFO_CLR, FIFO_CLR);
1486 } else {
1487 fsi_reg_write(fsi, DIFF_CTL, IRQ_HALF);
1488 fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
1489 }
1490 }
1491
1492 static int fsi_hw_startup(struct fsi_priv *fsi,
1493 struct fsi_stream *io,
1494 struct device *dev)
1495 {
1496 u32 data = 0;
1497
1498 /* clock setting */
1499 if (fsi_is_clk_master(fsi))
1500 data = DIMD | DOMD;
1501
1502 fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data);
1503
1504 /* clock inversion (CKG2) */
1505 data = 0;
1506 if (fsi->bit_clk_inv)
1507 data |= (1 << 0);
1508 if (fsi->lr_clk_inv)
1509 data |= (1 << 4);
1510 if (fsi_is_clk_master(fsi))
1511 data <<= 8;
1512 fsi_reg_write(fsi, CKG2, data);
1513
1514 /* spdif ? */
1515 if (fsi_is_spdif(fsi)) {
1516 fsi_spdif_clk_ctrl(fsi, 1);
1517 fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
1518 }
1519
1520 /*
1521 * get bus settings
1522 */
1523 data = 0;
1524 switch (io->sample_width) {
1525 case 2:
1526 data = BUSOP_GET(16, io->bus_option);
1527 break;
1528 case 4:
1529 data = BUSOP_GET(24, io->bus_option);
1530 break;
1531 }
1532 fsi_format_bus_setup(fsi, io, data, dev);
1533
1534 /* irq clear */
1535 fsi_irq_disable(fsi, io);
1536 fsi_irq_clear_status(fsi);
1537
1538 /* fifo init */
1539 fsi_fifo_init(fsi, io, dev);
1540
1541 /* start master clock */
1542 if (fsi_is_clk_master(fsi))
1543 return fsi_clk_enable(dev, fsi);
1544
1545 return 0;
1546 }
1547
1548 static int fsi_hw_shutdown(struct fsi_priv *fsi,
1549 struct device *dev)
1550 {
1551 /* stop master clock */
1552 if (fsi_is_clk_master(fsi))
1553 return fsi_clk_disable(dev, fsi);
1554
1555 return 0;
1556 }
1557
1558 static int fsi_dai_startup(struct snd_pcm_substream *substream,
1559 struct snd_soc_dai *dai)
1560 {
1561 struct fsi_priv *fsi = fsi_get_priv(substream);
1562
1563 fsi_clk_invalid(fsi);
1564
1565 return 0;
1566 }
1567
1568 static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
1569 struct snd_soc_dai *dai)
1570 {
1571 struct fsi_priv *fsi = fsi_get_priv(substream);
1572
1573 fsi_clk_invalid(fsi);
1574 }
1575
1576 static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
1577 struct snd_soc_dai *dai)
1578 {
1579 struct fsi_priv *fsi = fsi_get_priv(substream);
1580 struct fsi_stream *io = fsi_stream_get(fsi, substream);
1581 int ret = 0;
1582
1583 switch (cmd) {
1584 case SNDRV_PCM_TRIGGER_START:
1585 fsi_stream_init(fsi, io, substream);
1586 if (!ret)
1587 ret = fsi_hw_startup(fsi, io, dai->dev);
1588 if (!ret)
1589 ret = fsi_stream_start(fsi, io);
1590 if (!ret)
1591 ret = fsi_stream_transfer(io);
1592 break;
1593 case SNDRV_PCM_TRIGGER_STOP:
1594 if (!ret)
1595 ret = fsi_hw_shutdown(fsi, dai->dev);
1596 fsi_stream_stop(fsi, io);
1597 fsi_stream_quit(fsi, io);
1598 break;
1599 }
1600
1601 return ret;
1602 }
1603
1604 static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt)
1605 {
1606 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1607 case SND_SOC_DAIFMT_I2S:
1608 fsi->fmt = CR_I2S;
1609 fsi->chan_num = 2;
1610 break;
1611 case SND_SOC_DAIFMT_LEFT_J:
1612 fsi->fmt = CR_PCM;
1613 fsi->chan_num = 2;
1614 break;
1615 default:
1616 return -EINVAL;
1617 }
1618
1619 return 0;
1620 }
1621
1622 static int fsi_set_fmt_spdif(struct fsi_priv *fsi)
1623 {
1624 struct fsi_master *master = fsi_get_master(fsi);
1625
1626 if (fsi_version(master) < 2)
1627 return -EINVAL;
1628
1629 fsi->fmt = CR_DTMD_SPDIF_PCM | CR_PCM;
1630 fsi->chan_num = 2;
1631
1632 return 0;
1633 }
1634
1635 static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1636 {
1637 struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai);
1638 int ret;
1639
1640 /* set master/slave audio interface */
1641 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1642 case SND_SOC_DAIFMT_CBM_CFM:
1643 break;
1644 case SND_SOC_DAIFMT_CBS_CFS:
1645 fsi->clk_master = 1; /* codec is slave, cpu is master */
1646 break;
1647 default:
1648 return -EINVAL;
1649 }
1650
1651 /* set clock inversion */
1652 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
1653 case SND_SOC_DAIFMT_NB_IF:
1654 fsi->bit_clk_inv = 0;
1655 fsi->lr_clk_inv = 1;
1656 break;
1657 case SND_SOC_DAIFMT_IB_NF:
1658 fsi->bit_clk_inv = 1;
1659 fsi->lr_clk_inv = 0;
1660 break;
1661 case SND_SOC_DAIFMT_IB_IF:
1662 fsi->bit_clk_inv = 1;
1663 fsi->lr_clk_inv = 1;
1664 break;
1665 case SND_SOC_DAIFMT_NB_NF:
1666 default:
1667 fsi->bit_clk_inv = 0;
1668 fsi->lr_clk_inv = 0;
1669 break;
1670 }
1671
1672 if (fsi_is_clk_master(fsi)) {
1673 if (fsi->clk_cpg)
1674 fsi_clk_init(dai->dev, fsi, 0, 1, 1,
1675 fsi_clk_set_rate_cpg);
1676 else
1677 fsi_clk_init(dai->dev, fsi, 1, 1, 0,
1678 fsi_clk_set_rate_external);
1679 }
1680
1681 /* set format */
1682 if (fsi_is_spdif(fsi))
1683 ret = fsi_set_fmt_spdif(fsi);
1684 else
1685 ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1686
1687 return ret;
1688 }
1689
1690 static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
1691 struct snd_pcm_hw_params *params,
1692 struct snd_soc_dai *dai)
1693 {
1694 struct fsi_priv *fsi = fsi_get_priv(substream);
1695
1696 if (fsi_is_clk_master(fsi))
1697 fsi_clk_valid(fsi, params_rate(params));
1698
1699 return 0;
1700 }
1701
1702 static const struct snd_soc_dai_ops fsi_dai_ops = {
1703 .startup = fsi_dai_startup,
1704 .shutdown = fsi_dai_shutdown,
1705 .trigger = fsi_dai_trigger,
1706 .set_fmt = fsi_dai_set_fmt,
1707 .hw_params = fsi_dai_hw_params,
1708 };
1709
1710 /*
1711 * pcm ops
1712 */
1713
1714 static struct snd_pcm_hardware fsi_pcm_hardware = {
1715 .info = SNDRV_PCM_INFO_INTERLEAVED |
1716 SNDRV_PCM_INFO_MMAP |
1717 SNDRV_PCM_INFO_MMAP_VALID,
1718 .buffer_bytes_max = 64 * 1024,
1719 .period_bytes_min = 32,
1720 .period_bytes_max = 8192,
1721 .periods_min = 1,
1722 .periods_max = 32,
1723 .fifo_size = 256,
1724 };
1725
1726 static int fsi_pcm_open(struct snd_pcm_substream *substream)
1727 {
1728 struct snd_pcm_runtime *runtime = substream->runtime;
1729 int ret = 0;
1730
1731 snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware);
1732
1733 ret = snd_pcm_hw_constraint_integer(runtime,
1734 SNDRV_PCM_HW_PARAM_PERIODS);
1735
1736 return ret;
1737 }
1738
1739 static int fsi_hw_params(struct snd_pcm_substream *substream,
1740 struct snd_pcm_hw_params *hw_params)
1741 {
1742 return snd_pcm_lib_malloc_pages(substream,
1743 params_buffer_bytes(hw_params));
1744 }
1745
1746 static int fsi_hw_free(struct snd_pcm_substream *substream)
1747 {
1748 return snd_pcm_lib_free_pages(substream);
1749 }
1750
1751 static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
1752 {
1753 struct fsi_priv *fsi = fsi_get_priv(substream);
1754 struct fsi_stream *io = fsi_stream_get(fsi, substream);
1755
1756 return fsi_sample2frame(fsi, io->buff_sample_pos);
1757 }
1758
1759 static struct snd_pcm_ops fsi_pcm_ops = {
1760 .open = fsi_pcm_open,
1761 .ioctl = snd_pcm_lib_ioctl,
1762 .hw_params = fsi_hw_params,
1763 .hw_free = fsi_hw_free,
1764 .pointer = fsi_pointer,
1765 };
1766
1767 /*
1768 * snd_soc_platform
1769 */
1770
1771 #define PREALLOC_BUFFER (32 * 1024)
1772 #define PREALLOC_BUFFER_MAX (32 * 1024)
1773
1774 static int fsi_pcm_new(struct snd_soc_pcm_runtime *rtd)
1775 {
1776 return snd_pcm_lib_preallocate_pages_for_all(
1777 rtd->pcm,
1778 SNDRV_DMA_TYPE_DEV,
1779 rtd->card->snd_card->dev,
1780 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1781 }
1782
1783 /*
1784 * alsa struct
1785 */
1786
1787 static struct snd_soc_dai_driver fsi_soc_dai[] = {
1788 {
1789 .name = "fsia-dai",
1790 .playback = {
1791 .rates = FSI_RATES,
1792 .formats = FSI_FMTS,
1793 .channels_min = 2,
1794 .channels_max = 2,
1795 },
1796 .capture = {
1797 .rates = FSI_RATES,
1798 .formats = FSI_FMTS,
1799 .channels_min = 2,
1800 .channels_max = 2,
1801 },
1802 .ops = &fsi_dai_ops,
1803 },
1804 {
1805 .name = "fsib-dai",
1806 .playback = {
1807 .rates = FSI_RATES,
1808 .formats = FSI_FMTS,
1809 .channels_min = 2,
1810 .channels_max = 2,
1811 },
1812 .capture = {
1813 .rates = FSI_RATES,
1814 .formats = FSI_FMTS,
1815 .channels_min = 2,
1816 .channels_max = 2,
1817 },
1818 .ops = &fsi_dai_ops,
1819 },
1820 };
1821
1822 static struct snd_soc_platform_driver fsi_soc_platform = {
1823 .ops = &fsi_pcm_ops,
1824 .pcm_new = fsi_pcm_new,
1825 };
1826
1827 static const struct snd_soc_component_driver fsi_soc_component = {
1828 .name = "fsi",
1829 };
1830
1831 /*
1832 * platform function
1833 */
1834 static void fsi_of_parse(char *name,
1835 struct device_node *np,
1836 struct sh_fsi_port_info *info,
1837 struct device *dev)
1838 {
1839 int i;
1840 char prop[128];
1841 unsigned long flags = 0;
1842 struct {
1843 char *name;
1844 unsigned int val;
1845 } of_parse_property[] = {
1846 { "spdif-connection", SH_FSI_FMT_SPDIF },
1847 { "stream-mode-support", SH_FSI_ENABLE_STREAM_MODE },
1848 { "use-internal-clock", SH_FSI_CLK_CPG },
1849 };
1850
1851 for (i = 0; i < ARRAY_SIZE(of_parse_property); i++) {
1852 sprintf(prop, "%s,%s", name, of_parse_property[i].name);
1853 if (of_get_property(np, prop, NULL))
1854 flags |= of_parse_property[i].val;
1855 }
1856 info->flags = flags;
1857
1858 dev_dbg(dev, "%s flags : %lx\n", name, info->flags);
1859 }
1860
1861 static void fsi_port_info_init(struct fsi_priv *fsi,
1862 struct sh_fsi_port_info *info)
1863 {
1864 if (info->flags & SH_FSI_FMT_SPDIF)
1865 fsi->spdif = 1;
1866
1867 if (info->flags & SH_FSI_CLK_CPG)
1868 fsi->clk_cpg = 1;
1869
1870 if (info->flags & SH_FSI_ENABLE_STREAM_MODE)
1871 fsi->enable_stream = 1;
1872 }
1873
1874 static void fsi_handler_init(struct fsi_priv *fsi,
1875 struct sh_fsi_port_info *info)
1876 {
1877 fsi->playback.handler = &fsi_pio_push_handler; /* default PIO */
1878 fsi->playback.priv = fsi;
1879 fsi->capture.handler = &fsi_pio_pop_handler; /* default PIO */
1880 fsi->capture.priv = fsi;
1881
1882 if (info->tx_id) {
1883 fsi->playback.dma_id = info->tx_id;
1884 fsi->playback.handler = &fsi_dma_push_handler;
1885 }
1886 }
1887
1888 static const struct fsi_core fsi1_core = {
1889 .ver = 1,
1890
1891 /* Interrupt */
1892 .int_st = INT_ST,
1893 .iemsk = IEMSK,
1894 .imsk = IMSK,
1895 };
1896
1897 static const struct fsi_core fsi2_core = {
1898 .ver = 2,
1899
1900 /* Interrupt */
1901 .int_st = CPU_INT_ST,
1902 .iemsk = CPU_IEMSK,
1903 .imsk = CPU_IMSK,
1904 .a_mclk = A_MST_CTLR,
1905 .b_mclk = B_MST_CTLR,
1906 };
1907
1908 static const struct of_device_id fsi_of_match[] = {
1909 { .compatible = "renesas,sh_fsi", .data = &fsi1_core},
1910 { .compatible = "renesas,sh_fsi2", .data = &fsi2_core},
1911 {},
1912 };
1913 MODULE_DEVICE_TABLE(of, fsi_of_match);
1914
1915 static const struct platform_device_id fsi_id_table[] = {
1916 { "sh_fsi", (kernel_ulong_t)&fsi1_core },
1917 {},
1918 };
1919 MODULE_DEVICE_TABLE(platform, fsi_id_table);
1920
1921 static int fsi_probe(struct platform_device *pdev)
1922 {
1923 struct fsi_master *master;
1924 struct device_node *np = pdev->dev.of_node;
1925 struct sh_fsi_platform_info info;
1926 const struct fsi_core *core;
1927 struct fsi_priv *fsi;
1928 struct resource *res;
1929 unsigned int irq;
1930 int ret;
1931
1932 memset(&info, 0, sizeof(info));
1933
1934 core = NULL;
1935 if (np) {
1936 const struct of_device_id *of_id;
1937
1938 of_id = of_match_device(fsi_of_match, &pdev->dev);
1939 if (of_id) {
1940 core = of_id->data;
1941 fsi_of_parse("fsia", np, &info.port_a, &pdev->dev);
1942 fsi_of_parse("fsib", np, &info.port_b, &pdev->dev);
1943 }
1944 } else {
1945 const struct platform_device_id *id_entry = pdev->id_entry;
1946 if (id_entry)
1947 core = (struct fsi_core *)id_entry->driver_data;
1948
1949 if (pdev->dev.platform_data)
1950 memcpy(&info, pdev->dev.platform_data, sizeof(info));
1951 }
1952
1953 if (!core) {
1954 dev_err(&pdev->dev, "unknown fsi device\n");
1955 return -ENODEV;
1956 }
1957
1958 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1959 irq = platform_get_irq(pdev, 0);
1960 if (!res || (int)irq <= 0) {
1961 dev_err(&pdev->dev, "Not enough FSI platform resources.\n");
1962 return -ENODEV;
1963 }
1964
1965 master = devm_kzalloc(&pdev->dev, sizeof(*master), GFP_KERNEL);
1966 if (!master) {
1967 dev_err(&pdev->dev, "Could not allocate master\n");
1968 return -ENOMEM;
1969 }
1970
1971 master->base = devm_ioremap_nocache(&pdev->dev,
1972 res->start, resource_size(res));
1973 if (!master->base) {
1974 dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n");
1975 return -ENXIO;
1976 }
1977
1978 /* master setting */
1979 master->core = core;
1980 spin_lock_init(&master->lock);
1981
1982 /* FSI A setting */
1983 fsi = &master->fsia;
1984 fsi->base = master->base;
1985 fsi->phys = res->start;
1986 fsi->master = master;
1987 fsi_port_info_init(fsi, &info.port_a);
1988 fsi_handler_init(fsi, &info.port_a);
1989 ret = fsi_stream_probe(fsi, &pdev->dev);
1990 if (ret < 0) {
1991 dev_err(&pdev->dev, "FSIA stream probe failed\n");
1992 return ret;
1993 }
1994
1995 /* FSI B setting */
1996 fsi = &master->fsib;
1997 fsi->base = master->base + 0x40;
1998 fsi->phys = res->start + 0x40;
1999 fsi->master = master;
2000 fsi_port_info_init(fsi, &info.port_b);
2001 fsi_handler_init(fsi, &info.port_b);
2002 ret = fsi_stream_probe(fsi, &pdev->dev);
2003 if (ret < 0) {
2004 dev_err(&pdev->dev, "FSIB stream probe failed\n");
2005 goto exit_fsia;
2006 }
2007
2008 pm_runtime_enable(&pdev->dev);
2009 dev_set_drvdata(&pdev->dev, master);
2010
2011 ret = devm_request_irq(&pdev->dev, irq, &fsi_interrupt, 0,
2012 dev_name(&pdev->dev), master);
2013 if (ret) {
2014 dev_err(&pdev->dev, "irq request err\n");
2015 goto exit_fsib;
2016 }
2017
2018 ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform);
2019 if (ret < 0) {
2020 dev_err(&pdev->dev, "cannot snd soc register\n");
2021 goto exit_fsib;
2022 }
2023
2024 ret = snd_soc_register_component(&pdev->dev, &fsi_soc_component,
2025 fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai));
2026 if (ret < 0) {
2027 dev_err(&pdev->dev, "cannot snd component register\n");
2028 goto exit_snd_soc;
2029 }
2030
2031 return ret;
2032
2033 exit_snd_soc:
2034 snd_soc_unregister_platform(&pdev->dev);
2035 exit_fsib:
2036 pm_runtime_disable(&pdev->dev);
2037 fsi_stream_remove(&master->fsib);
2038 exit_fsia:
2039 fsi_stream_remove(&master->fsia);
2040
2041 return ret;
2042 }
2043
2044 static int fsi_remove(struct platform_device *pdev)
2045 {
2046 struct fsi_master *master;
2047
2048 master = dev_get_drvdata(&pdev->dev);
2049
2050 pm_runtime_disable(&pdev->dev);
2051
2052 snd_soc_unregister_component(&pdev->dev);
2053 snd_soc_unregister_platform(&pdev->dev);
2054
2055 fsi_stream_remove(&master->fsia);
2056 fsi_stream_remove(&master->fsib);
2057
2058 return 0;
2059 }
2060
2061 static void __fsi_suspend(struct fsi_priv *fsi,
2062 struct fsi_stream *io,
2063 struct device *dev)
2064 {
2065 if (!fsi_stream_is_working(fsi, io))
2066 return;
2067
2068 fsi_stream_stop(fsi, io);
2069 fsi_hw_shutdown(fsi, dev);
2070 }
2071
2072 static void __fsi_resume(struct fsi_priv *fsi,
2073 struct fsi_stream *io,
2074 struct device *dev)
2075 {
2076 if (!fsi_stream_is_working(fsi, io))
2077 return;
2078
2079 fsi_hw_startup(fsi, io, dev);
2080 fsi_stream_start(fsi, io);
2081 }
2082
2083 static int fsi_suspend(struct device *dev)
2084 {
2085 struct fsi_master *master = dev_get_drvdata(dev);
2086 struct fsi_priv *fsia = &master->fsia;
2087 struct fsi_priv *fsib = &master->fsib;
2088
2089 __fsi_suspend(fsia, &fsia->playback, dev);
2090 __fsi_suspend(fsia, &fsia->capture, dev);
2091
2092 __fsi_suspend(fsib, &fsib->playback, dev);
2093 __fsi_suspend(fsib, &fsib->capture, dev);
2094
2095 return 0;
2096 }
2097
2098 static int fsi_resume(struct device *dev)
2099 {
2100 struct fsi_master *master = dev_get_drvdata(dev);
2101 struct fsi_priv *fsia = &master->fsia;
2102 struct fsi_priv *fsib = &master->fsib;
2103
2104 __fsi_resume(fsia, &fsia->playback, dev);
2105 __fsi_resume(fsia, &fsia->capture, dev);
2106
2107 __fsi_resume(fsib, &fsib->playback, dev);
2108 __fsi_resume(fsib, &fsib->capture, dev);
2109
2110 return 0;
2111 }
2112
2113 static struct dev_pm_ops fsi_pm_ops = {
2114 .suspend = fsi_suspend,
2115 .resume = fsi_resume,
2116 };
2117
2118 static struct platform_driver fsi_driver = {
2119 .driver = {
2120 .name = "fsi-pcm-audio",
2121 .pm = &fsi_pm_ops,
2122 .of_match_table = fsi_of_match,
2123 },
2124 .probe = fsi_probe,
2125 .remove = fsi_remove,
2126 .id_table = fsi_id_table,
2127 };
2128
2129 module_platform_driver(fsi_driver);
2130
2131 MODULE_LICENSE("GPL v2");
2132 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
2133 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
2134 MODULE_ALIAS("platform:fsi-pcm-audio");
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