2 * Renesas R-Car SRU/SCU/SSIU/SSI support
4 * Copyright (C) 2013 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
8 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
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.
16 * Renesas R-Car sound device structure
20 * SRU : Sound Routing Unit
21 * - SRC : Sampling Rate Converter
23 * - CTU : Channel Count Conversion Unit
25 * - DVC : Digital Volume and Mute Function
26 * - SSI : Serial Sound Interface
30 * SCU : Sampling Rate Converter Unit
31 * - SRC : Sampling Rate Converter
33 * - CTU : Channel Count Conversion Unit
35 * - DVC : Digital Volume and Mute Function
36 * SSIU : Serial Sound Interface Unit
37 * - SSI : Serial Sound Interface
45 * | ** this depends on Gen1/Gen2
49 * | ** these depend on data path
50 * | ** gen and platform data control it
54 * | +- playback -> [mod] -> [mod] -> [mod] -> ...
57 * | +- capture -> [mod] -> [mod] -> [mod] -> ...
61 * | +- playback -> [mod] -> [mod] -> [mod] -> ...
64 * | +- capture -> [mod] -> [mod] -> [mod] -> ...
67 * | ** these control ssi
76 * | ** these control scu
86 * for_each_rsnd_dai(xx, priv, xx)
87 * rdai[0] => rdai[1] => rdai[2] => ...
89 * for_each_rsnd_mod(xx, rdai, xx)
90 * [mod] => [mod] => [mod] => ...
92 * rsnd_dai_call(xxx, fn )
93 * [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
96 #include <linux/pm_runtime.h>
99 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
103 * rsnd_platform functions
105 #define rsnd_platform_call(priv, dai, func, param...) \
106 (!(priv->info->func) ? 0 : \
107 priv->info->func(param))
112 char *rsnd_mod_name(struct rsnd_mod
*mod
)
114 if (!mod
|| !mod
->ops
)
117 return mod
->ops
->name
;
120 void rsnd_mod_init(struct rsnd_priv
*priv
,
121 struct rsnd_mod
*mod
,
122 struct rsnd_mod_ops
*ops
,
128 INIT_LIST_HEAD(&mod
->list
);
134 static void rsnd_dma_continue(struct rsnd_dma
*dma
)
136 /* push next A or B plane */
137 dma
->submit_loop
= 1;
138 schedule_work(&dma
->work
);
141 void rsnd_dma_start(struct rsnd_dma
*dma
)
143 /* push both A and B plane*/
144 dma
->submit_loop
= 2;
145 schedule_work(&dma
->work
);
148 void rsnd_dma_stop(struct rsnd_dma
*dma
)
150 dma
->submit_loop
= 0;
151 cancel_work_sync(&dma
->work
);
152 dmaengine_terminate_all(dma
->chan
);
155 static void rsnd_dma_complete(void *data
)
157 struct rsnd_dma
*dma
= (struct rsnd_dma
*)data
;
158 struct rsnd_priv
*priv
= dma
->priv
;
161 rsnd_lock(priv
, flags
);
165 if (dma
->submit_loop
)
166 rsnd_dma_continue(dma
);
168 rsnd_unlock(priv
, flags
);
171 static void rsnd_dma_do_work(struct work_struct
*work
)
173 struct rsnd_dma
*dma
= container_of(work
, struct rsnd_dma
, work
);
174 struct rsnd_priv
*priv
= dma
->priv
;
175 struct device
*dev
= rsnd_priv_to_dev(priv
);
176 struct dma_async_tx_descriptor
*desc
;
181 for (i
= 0; i
< dma
->submit_loop
; i
++) {
183 if (dma
->inquiry(dma
, &buf
, &len
) < 0)
186 desc
= dmaengine_prep_slave_single(
187 dma
->chan
, buf
, len
, dma
->dir
,
188 DMA_PREP_INTERRUPT
| DMA_CTRL_ACK
);
190 dev_err(dev
, "dmaengine_prep_slave_sg() fail\n");
194 desc
->callback
= rsnd_dma_complete
;
195 desc
->callback_param
= dma
;
197 if (dmaengine_submit(desc
) < 0) {
198 dev_err(dev
, "dmaengine_submit() fail\n");
204 dma_async_issue_pending(dma
->chan
);
207 int rsnd_dma_available(struct rsnd_dma
*dma
)
212 static bool rsnd_dma_filter(struct dma_chan
*chan
, void *param
)
214 chan
->private = param
;
219 int rsnd_dma_init(struct rsnd_priv
*priv
, struct rsnd_dma
*dma
,
221 int (*inquiry
)(struct rsnd_dma
*dma
,
222 dma_addr_t
*buf
, int *len
),
223 int (*complete
)(struct rsnd_dma
*dma
))
225 struct device
*dev
= rsnd_priv_to_dev(priv
);
229 dev_err(dev
, "it already has dma channel\n");
234 dma_cap_set(DMA_SLAVE
, mask
);
236 dma
->slave
.shdma_slave
.slave_id
= id
;
238 dma
->chan
= dma_request_channel(mask
, rsnd_dma_filter
,
239 &dma
->slave
.shdma_slave
);
241 dev_err(dev
, "can't get dma channel\n");
245 dma
->dir
= is_play
? DMA_TO_DEVICE
: DMA_FROM_DEVICE
;
247 dma
->inquiry
= inquiry
;
248 dma
->complete
= complete
;
249 INIT_WORK(&dma
->work
, rsnd_dma_do_work
);
254 void rsnd_dma_quit(struct rsnd_priv
*priv
,
255 struct rsnd_dma
*dma
)
258 dma_release_channel(dma
->chan
);
266 #define rsnd_dai_call(rdai, io, fn) \
268 struct rsnd_mod *mod, *n; \
270 for_each_rsnd_mod(mod, n, io) { \
271 ret = rsnd_mod_call(mod, fn, rdai, io); \
278 int rsnd_dai_connect(struct rsnd_dai
*rdai
,
279 struct rsnd_mod
*mod
,
280 struct rsnd_dai_stream
*io
)
285 if (!list_empty(&mod
->list
)) {
286 struct rsnd_priv
*priv
= rsnd_mod_to_priv(mod
);
287 struct device
*dev
= rsnd_priv_to_dev(priv
);
289 dev_err(dev
, "%s%d is not empty\n",
295 list_add_tail(&mod
->list
, &io
->head
);
300 int rsnd_dai_disconnect(struct rsnd_mod
*mod
)
302 list_del_init(&mod
->list
);
307 int rsnd_dai_id(struct rsnd_priv
*priv
, struct rsnd_dai
*rdai
)
309 int id
= rdai
- priv
->rdai
;
311 if ((id
< 0) || (id
>= rsnd_dai_nr(priv
)))
317 struct rsnd_dai
*rsnd_dai_get(struct rsnd_priv
*priv
, int id
)
319 if ((id
< 0) || (id
>= rsnd_dai_nr(priv
)))
322 return priv
->rdai
+ id
;
325 static struct rsnd_dai
*rsnd_dai_to_rdai(struct snd_soc_dai
*dai
)
327 struct rsnd_priv
*priv
= snd_soc_dai_get_drvdata(dai
);
329 return rsnd_dai_get(priv
, dai
->id
);
332 int rsnd_dai_is_play(struct rsnd_dai
*rdai
, struct rsnd_dai_stream
*io
)
334 return &rdai
->playback
== io
;
338 * rsnd_soc_dai functions
340 int rsnd_dai_pointer_offset(struct rsnd_dai_stream
*io
, int additional
)
342 struct snd_pcm_substream
*substream
= io
->substream
;
343 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
344 int pos
= io
->byte_pos
+ additional
;
346 pos
%= (runtime
->periods
* io
->byte_per_period
);
351 void rsnd_dai_pointer_update(struct rsnd_dai_stream
*io
, int byte
)
353 io
->byte_pos
+= byte
;
355 if (io
->byte_pos
>= io
->next_period_byte
) {
356 struct snd_pcm_substream
*substream
= io
->substream
;
357 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
360 io
->next_period_byte
+= io
->byte_per_period
;
362 if (io
->period_pos
>= runtime
->periods
) {
365 io
->next_period_byte
= io
->byte_per_period
;
368 snd_pcm_period_elapsed(substream
);
372 static int rsnd_dai_stream_init(struct rsnd_dai_stream
*io
,
373 struct snd_pcm_substream
*substream
)
375 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
377 if (!list_empty(&io
->head
))
380 INIT_LIST_HEAD(&io
->head
);
381 io
->substream
= substream
;
384 io
->byte_per_period
= runtime
->period_size
*
386 samples_to_bytes(runtime
, 1);
387 io
->next_period_byte
= io
->byte_per_period
;
393 struct snd_soc_dai
*rsnd_substream_to_dai(struct snd_pcm_substream
*substream
)
395 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
401 struct rsnd_dai_stream
*rsnd_rdai_to_io(struct rsnd_dai
*rdai
,
402 struct snd_pcm_substream
*substream
)
404 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
405 return &rdai
->playback
;
407 return &rdai
->capture
;
410 static int rsnd_soc_dai_trigger(struct snd_pcm_substream
*substream
, int cmd
,
411 struct snd_soc_dai
*dai
)
413 struct rsnd_priv
*priv
= snd_soc_dai_get_drvdata(dai
);
414 struct rsnd_dai
*rdai
= rsnd_dai_to_rdai(dai
);
415 struct rsnd_dai_stream
*io
= rsnd_rdai_to_io(rdai
, substream
);
416 struct rsnd_mod
*mod
= rsnd_ssi_mod_get_frm_dai(priv
,
417 rsnd_dai_id(priv
, rdai
),
418 rsnd_dai_is_play(rdai
, io
));
419 int ssi_id
= rsnd_mod_id(mod
);
423 rsnd_lock(priv
, flags
);
426 case SNDRV_PCM_TRIGGER_START
:
427 ret
= rsnd_dai_stream_init(io
, substream
);
429 goto dai_trigger_end
;
431 ret
= rsnd_platform_call(priv
, dai
, start
, ssi_id
);
433 goto dai_trigger_end
;
435 ret
= rsnd_gen_path_init(priv
, rdai
, io
);
437 goto dai_trigger_end
;
439 ret
= rsnd_dai_call(rdai
, io
, init
);
441 goto dai_trigger_end
;
443 ret
= rsnd_dai_call(rdai
, io
, start
);
445 goto dai_trigger_end
;
447 case SNDRV_PCM_TRIGGER_STOP
:
448 ret
= rsnd_dai_call(rdai
, io
, stop
);
450 goto dai_trigger_end
;
452 ret
= rsnd_dai_call(rdai
, io
, quit
);
454 goto dai_trigger_end
;
456 ret
= rsnd_gen_path_exit(priv
, rdai
, io
);
458 goto dai_trigger_end
;
460 ret
= rsnd_platform_call(priv
, dai
, stop
, ssi_id
);
462 goto dai_trigger_end
;
469 rsnd_unlock(priv
, flags
);
474 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai
*dai
, unsigned int fmt
)
476 struct rsnd_dai
*rdai
= rsnd_dai_to_rdai(dai
);
478 /* set master/slave audio interface */
479 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
480 case SND_SOC_DAIFMT_CBM_CFM
:
481 rdai
->clk_master
= 1;
483 case SND_SOC_DAIFMT_CBS_CFS
:
484 rdai
->clk_master
= 0;
490 /* set clock inversion */
491 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
492 case SND_SOC_DAIFMT_NB_IF
:
493 rdai
->bit_clk_inv
= 0;
494 rdai
->frm_clk_inv
= 1;
496 case SND_SOC_DAIFMT_IB_NF
:
497 rdai
->bit_clk_inv
= 1;
498 rdai
->frm_clk_inv
= 0;
500 case SND_SOC_DAIFMT_IB_IF
:
501 rdai
->bit_clk_inv
= 1;
502 rdai
->frm_clk_inv
= 1;
504 case SND_SOC_DAIFMT_NB_NF
:
506 rdai
->bit_clk_inv
= 0;
507 rdai
->frm_clk_inv
= 0;
512 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
513 case SND_SOC_DAIFMT_I2S
:
515 rdai
->data_alignment
= 0;
517 case SND_SOC_DAIFMT_LEFT_J
:
519 rdai
->data_alignment
= 0;
521 case SND_SOC_DAIFMT_RIGHT_J
:
523 rdai
->data_alignment
= 1;
530 static const struct snd_soc_dai_ops rsnd_soc_dai_ops
= {
531 .trigger
= rsnd_soc_dai_trigger
,
532 .set_fmt
= rsnd_soc_dai_set_fmt
,
535 static int rsnd_dai_probe(struct platform_device
*pdev
,
536 struct rcar_snd_info
*info
,
537 struct rsnd_priv
*priv
)
539 struct snd_soc_dai_driver
*drv
;
540 struct rsnd_dai
*rdai
;
541 struct rsnd_mod
*pmod
, *cmod
;
542 struct device
*dev
= rsnd_priv_to_dev(priv
);
547 for (dai_nr
= 0; dai_nr
< 32; dai_nr
++) {
548 pmod
= rsnd_ssi_mod_get_frm_dai(priv
, dai_nr
, 1);
549 cmod
= rsnd_ssi_mod_get_frm_dai(priv
, dai_nr
, 0);
556 dev_err(dev
, "no dai\n");
560 drv
= devm_kzalloc(dev
, sizeof(*drv
) * dai_nr
, GFP_KERNEL
);
561 rdai
= devm_kzalloc(dev
, sizeof(*rdai
) * dai_nr
, GFP_KERNEL
);
563 dev_err(dev
, "dai allocate failed\n");
567 for (i
= 0; i
< dai_nr
; i
++) {
569 pmod
= rsnd_ssi_mod_get_frm_dai(priv
, i
, 1);
570 cmod
= rsnd_ssi_mod_get_frm_dai(priv
, i
, 0);
575 INIT_LIST_HEAD(&rdai
[i
].playback
.head
);
576 INIT_LIST_HEAD(&rdai
[i
].capture
.head
);
578 snprintf(rdai
[i
].name
, RSND_DAI_NAME_SIZE
, "rsnd-dai.%d", i
);
581 * init snd_soc_dai_driver
583 drv
[i
].name
= rdai
[i
].name
;
584 drv
[i
].ops
= &rsnd_soc_dai_ops
;
586 drv
[i
].playback
.rates
= RSND_RATES
;
587 drv
[i
].playback
.formats
= RSND_FMTS
;
588 drv
[i
].playback
.channels_min
= 2;
589 drv
[i
].playback
.channels_max
= 2;
592 drv
[i
].capture
.rates
= RSND_RATES
;
593 drv
[i
].capture
.formats
= RSND_FMTS
;
594 drv
[i
].capture
.channels_min
= 2;
595 drv
[i
].capture
.channels_max
= 2;
598 dev_dbg(dev
, "%s (%s/%s)\n", rdai
[i
].name
,
599 pmod
? "play" : " -- ",
600 cmod
? "capture" : " -- ");
603 priv
->dai_nr
= dai_nr
;
610 static void rsnd_dai_remove(struct platform_device
*pdev
,
611 struct rsnd_priv
*priv
)
618 static struct snd_pcm_hardware rsnd_pcm_hardware
= {
619 .info
= SNDRV_PCM_INFO_INTERLEAVED
|
620 SNDRV_PCM_INFO_MMAP
|
621 SNDRV_PCM_INFO_MMAP_VALID
|
622 SNDRV_PCM_INFO_PAUSE
,
623 .formats
= RSND_FMTS
,
629 .buffer_bytes_max
= 64 * 1024,
630 .period_bytes_min
= 32,
631 .period_bytes_max
= 8192,
637 static int rsnd_pcm_open(struct snd_pcm_substream
*substream
)
639 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
642 snd_soc_set_runtime_hwparams(substream
, &rsnd_pcm_hardware
);
644 ret
= snd_pcm_hw_constraint_integer(runtime
,
645 SNDRV_PCM_HW_PARAM_PERIODS
);
650 static int rsnd_hw_params(struct snd_pcm_substream
*substream
,
651 struct snd_pcm_hw_params
*hw_params
)
653 return snd_pcm_lib_malloc_pages(substream
,
654 params_buffer_bytes(hw_params
));
657 static snd_pcm_uframes_t
rsnd_pointer(struct snd_pcm_substream
*substream
)
659 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
660 struct snd_soc_dai
*dai
= rsnd_substream_to_dai(substream
);
661 struct rsnd_dai
*rdai
= rsnd_dai_to_rdai(dai
);
662 struct rsnd_dai_stream
*io
= rsnd_rdai_to_io(rdai
, substream
);
664 return bytes_to_frames(runtime
, io
->byte_pos
);
667 static struct snd_pcm_ops rsnd_pcm_ops
= {
668 .open
= rsnd_pcm_open
,
669 .ioctl
= snd_pcm_lib_ioctl
,
670 .hw_params
= rsnd_hw_params
,
671 .hw_free
= snd_pcm_lib_free_pages
,
672 .pointer
= rsnd_pointer
,
679 #define PREALLOC_BUFFER (32 * 1024)
680 #define PREALLOC_BUFFER_MAX (32 * 1024)
682 static int rsnd_pcm_new(struct snd_soc_pcm_runtime
*rtd
)
684 return snd_pcm_lib_preallocate_pages_for_all(
687 rtd
->card
->snd_card
->dev
,
688 PREALLOC_BUFFER
, PREALLOC_BUFFER_MAX
);
691 static void rsnd_pcm_free(struct snd_pcm
*pcm
)
693 snd_pcm_lib_preallocate_free_for_all(pcm
);
696 static struct snd_soc_platform_driver rsnd_soc_platform
= {
697 .ops
= &rsnd_pcm_ops
,
698 .pcm_new
= rsnd_pcm_new
,
699 .pcm_free
= rsnd_pcm_free
,
702 static const struct snd_soc_component_driver rsnd_soc_component
= {
709 static int rsnd_probe(struct platform_device
*pdev
)
711 struct rcar_snd_info
*info
;
712 struct rsnd_priv
*priv
;
713 struct device
*dev
= &pdev
->dev
;
716 info
= pdev
->dev
.platform_data
;
718 dev_err(dev
, "driver needs R-Car sound information\n");
725 priv
= devm_kzalloc(dev
, sizeof(*priv
), GFP_KERNEL
);
727 dev_err(dev
, "priv allocate failed\n");
733 spin_lock_init(&priv
->lock
);
738 ret
= rsnd_gen_probe(pdev
, info
, priv
);
742 ret
= rsnd_scu_probe(pdev
, info
, priv
);
746 ret
= rsnd_adg_probe(pdev
, info
, priv
);
750 ret
= rsnd_ssi_probe(pdev
, info
, priv
);
754 ret
= rsnd_dai_probe(pdev
, info
, priv
);
761 ret
= snd_soc_register_platform(dev
, &rsnd_soc_platform
);
763 dev_err(dev
, "cannot snd soc register\n");
767 ret
= snd_soc_register_component(dev
, &rsnd_soc_component
,
768 priv
->daidrv
, rsnd_dai_nr(priv
));
770 dev_err(dev
, "cannot snd dai register\n");
774 dev_set_drvdata(dev
, priv
);
776 pm_runtime_enable(dev
);
778 dev_info(dev
, "probed\n");
782 snd_soc_unregister_platform(dev
);
787 static int rsnd_remove(struct platform_device
*pdev
)
789 struct rsnd_priv
*priv
= dev_get_drvdata(&pdev
->dev
);
791 pm_runtime_disable(&pdev
->dev
);
796 rsnd_ssi_remove(pdev
, priv
);
797 rsnd_adg_remove(pdev
, priv
);
798 rsnd_scu_remove(pdev
, priv
);
799 rsnd_dai_remove(pdev
, priv
);
800 rsnd_gen_remove(pdev
, priv
);
805 static struct platform_driver rsnd_driver
= {
807 .name
= "rcar_sound",
810 .remove
= rsnd_remove
,
812 module_platform_driver(rsnd_driver
);
814 MODULE_LICENSE("GPL");
815 MODULE_DESCRIPTION("Renesas R-Car audio driver");
816 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
817 MODULE_ALIAS("platform:rcar-pcm-audio");