1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // siu_dai.c - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
4 //
5 // Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6 // Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
7
8 #include <linux/delay.h>
9 #include <linux/firmware.h>
10 #include <linux/pm_runtime.h>
11 #include <linux/slab.h>
12 #include <linux/module.h>
13
14 #include <asm/clock.h>
15 #include <asm/siu.h>
16
17 #include <sound/control.h>
18 #include <sound/soc.h>
19
20 #include "siu.h"
21
22 /* Board specifics */
23 #if defined(CONFIG_CPU_SUBTYPE_SH7722)
24 # define SIU_MAX_VOLUME 0x1000
25 #else
26 # define SIU_MAX_VOLUME 0x7fff
27 #endif
28
29 #define PRAM_SIZE 0x2000
30 #define XRAM_SIZE 0x800
31 #define YRAM_SIZE 0x800
32
33 #define XRAM_OFFSET 0x4000
34 #define YRAM_OFFSET 0x6000
35 #define REG_OFFSET 0xc000
36
37 #define PLAYBACK_ENABLED 1
38 #define CAPTURE_ENABLED 2
39
40 #define VOLUME_CAPTURE 0
41 #define VOLUME_PLAYBACK 1
42 #define DFLT_VOLUME_LEVEL 0x08000800
43
44 /*
45 * SPDIF is only available on port A and on some SIU implementations it is only
46 * available for input. Due to the lack of hardware to test it, SPDIF is left
47 * disabled in this driver version
48 */
49 struct format_flag {
50 u32 i2s;
51 u32 pcm;
52 u32 spdif;
53 u32 mask;
54 };
55
56 struct port_flag {
57 struct format_flag playback;
58 struct format_flag capture;
59 };
60
61 struct siu_info *siu_i2s_data;
62
63 static struct port_flag siu_flags[SIU_PORT_NUM] = {
64 [SIU_PORT_A] = {
65 .playback = {
66 .i2s = 0x50000000,
67 .pcm = 0x40000000,
68 .spdif = 0x80000000, /* not on all SIU versions */
69 .mask = 0xd0000000,
70 },
71 .capture = {
72 .i2s = 0x05000000,
73 .pcm = 0x04000000,
74 .spdif = 0x08000000,
75 .mask = 0x0d000000,
76 },
77 },
78 [SIU_PORT_B] = {
79 .playback = {
80 .i2s = 0x00500000,
81 .pcm = 0x00400000,
82 .spdif = 0, /* impossible - turn off */
83 .mask = 0x00500000,
84 },
85 .capture = {
86 .i2s = 0x00050000,
87 .pcm = 0x00040000,
88 .spdif = 0, /* impossible - turn off */
89 .mask = 0x00050000,
90 },
91 },
92 };
93
siu_dai_start(struct siu_port * port_info)94 static void siu_dai_start(struct siu_port *port_info)
95 {
96 struct siu_info *info = siu_i2s_data;
97 u32 __iomem *base = info->reg;
98
99 dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
100
101 /* Issue software reset to siu */
102 siu_write32(base + SIU_SRCTL, 0);
103
104 /* Wait for the reset to take effect */
105 udelay(1);
106
107 port_info->stfifo = 0;
108 port_info->trdat = 0;
109
110 /* portA, portB, SIU operate */
111 siu_write32(base + SIU_SRCTL, 0x301);
112
113 /* portA=256fs, portB=256fs */
114 siu_write32(base + SIU_CKCTL, 0x40400000);
115
116 /* portA's BRG does not divide SIUCKA */
117 siu_write32(base + SIU_BRGASEL, 0);
118 siu_write32(base + SIU_BRRA, 0);
119
120 /* portB's BRG divides SIUCKB by half */
121 siu_write32(base + SIU_BRGBSEL, 1);
122 siu_write32(base + SIU_BRRB, 0);
123
124 siu_write32(base + SIU_IFCTL, 0x44440000);
125
126 /* portA: 32 bit/fs, master; portB: 32 bit/fs, master */
127 siu_write32(base + SIU_SFORM, 0x0c0c0000);
128
129 /*
130 * Volume levels: looks like the DSP firmware implements volume controls
131 * differently from what's described in the datasheet
132 */
133 siu_write32(base + SIU_SBDVCA, port_info->playback.volume);
134 siu_write32(base + SIU_SBDVCB, port_info->capture.volume);
135 }
136
siu_dai_stop(struct siu_port * port_info)137 static void siu_dai_stop(struct siu_port *port_info)
138 {
139 struct siu_info *info = siu_i2s_data;
140 u32 __iomem *base = info->reg;
141
142 /* SIU software reset */
143 siu_write32(base + SIU_SRCTL, 0);
144 }
145
siu_dai_spbAselect(struct siu_port * port_info)146 static void siu_dai_spbAselect(struct siu_port *port_info)
147 {
148 struct siu_info *info = siu_i2s_data;
149 struct siu_firmware *fw = &info->fw;
150 u32 *ydef = fw->yram0;
151 u32 idx;
152
153 /* path A use */
154 if (!info->port_id)
155 idx = 1; /* portA */
156 else
157 idx = 2; /* portB */
158
159 ydef[0] = (fw->spbpar[idx].ab1a << 16) |
160 (fw->spbpar[idx].ab0a << 8) |
161 (fw->spbpar[idx].dir << 7) | 3;
162 ydef[1] = fw->yram0[1]; /* 0x03000300 */
163 ydef[2] = (16 / 2) << 24;
164 ydef[3] = fw->yram0[3]; /* 0 */
165 ydef[4] = fw->yram0[4]; /* 0 */
166 ydef[7] = fw->spbpar[idx].event;
167 port_info->stfifo |= fw->spbpar[idx].stfifo;
168 port_info->trdat |= fw->spbpar[idx].trdat;
169 }
170
siu_dai_spbBselect(struct siu_port * port_info)171 static void siu_dai_spbBselect(struct siu_port *port_info)
172 {
173 struct siu_info *info = siu_i2s_data;
174 struct siu_firmware *fw = &info->fw;
175 u32 *ydef = fw->yram0;
176 u32 idx;
177
178 /* path B use */
179 if (!info->port_id)
180 idx = 7; /* portA */
181 else
182 idx = 8; /* portB */
183
184 ydef[5] = (fw->spbpar[idx].ab1a << 16) |
185 (fw->spbpar[idx].ab0a << 8) | 1;
186 ydef[6] = fw->spbpar[idx].event;
187 port_info->stfifo |= fw->spbpar[idx].stfifo;
188 port_info->trdat |= fw->spbpar[idx].trdat;
189 }
190
siu_dai_open(struct siu_stream * siu_stream)191 static void siu_dai_open(struct siu_stream *siu_stream)
192 {
193 struct siu_info *info = siu_i2s_data;
194 u32 __iomem *base = info->reg;
195 u32 srctl, ifctl;
196
197 srctl = siu_read32(base + SIU_SRCTL);
198 ifctl = siu_read32(base + SIU_IFCTL);
199
200 switch (info->port_id) {
201 case SIU_PORT_A:
202 /* portA operates */
203 srctl |= 0x200;
204 ifctl &= ~0xc2;
205 break;
206 case SIU_PORT_B:
207 /* portB operates */
208 srctl |= 0x100;
209 ifctl &= ~0x31;
210 break;
211 }
212
213 siu_write32(base + SIU_SRCTL, srctl);
214 /* Unmute and configure portA */
215 siu_write32(base + SIU_IFCTL, ifctl);
216 }
217
218 /*
219 * At the moment only fixed Left-upper, Left-lower, Right-upper, Right-lower
220 * packing is supported
221 */
siu_dai_pcmdatapack(struct siu_stream * siu_stream)222 static void siu_dai_pcmdatapack(struct siu_stream *siu_stream)
223 {
224 struct siu_info *info = siu_i2s_data;
225 u32 __iomem *base = info->reg;
226 u32 dpak;
227
228 dpak = siu_read32(base + SIU_DPAK);
229
230 switch (info->port_id) {
231 case SIU_PORT_A:
232 dpak &= ~0xc0000000;
233 break;
234 case SIU_PORT_B:
235 dpak &= ~0x00c00000;
236 break;
237 }
238
239 siu_write32(base + SIU_DPAK, dpak);
240 }
241
siu_dai_spbstart(struct siu_port * port_info)242 static int siu_dai_spbstart(struct siu_port *port_info)
243 {
244 struct siu_info *info = siu_i2s_data;
245 u32 __iomem *base = info->reg;
246 struct siu_firmware *fw = &info->fw;
247 u32 *ydef = fw->yram0;
248 int cnt;
249 u32 __iomem *add;
250 u32 *ptr;
251
252 /* Load SPB Program in PRAM */
253 ptr = fw->pram0;
254 add = info->pram;
255 for (cnt = 0; cnt < PRAM0_SIZE; cnt++, add++, ptr++)
256 siu_write32(add, *ptr);
257
258 ptr = fw->pram1;
259 add = info->pram + (0x0100 / sizeof(u32));
260 for (cnt = 0; cnt < PRAM1_SIZE; cnt++, add++, ptr++)
261 siu_write32(add, *ptr);
262
263 /* XRAM initialization */
264 add = info->xram;
265 for (cnt = 0; cnt < XRAM0_SIZE + XRAM1_SIZE + XRAM2_SIZE; cnt++, add++)
266 siu_write32(add, 0);
267
268 /* YRAM variable area initialization */
269 add = info->yram;
270 for (cnt = 0; cnt < YRAM_DEF_SIZE; cnt++, add++)
271 siu_write32(add, ydef[cnt]);
272
273 /* YRAM FIR coefficient area initialization */
274 add = info->yram + (0x0200 / sizeof(u32));
275 for (cnt = 0; cnt < YRAM_FIR_SIZE; cnt++, add++)
276 siu_write32(add, fw->yram_fir_coeff[cnt]);
277
278 /* YRAM IIR coefficient area initialization */
279 add = info->yram + (0x0600 / sizeof(u32));
280 for (cnt = 0; cnt < YRAM_IIR_SIZE; cnt++, add++)
281 siu_write32(add, 0);
282
283 siu_write32(base + SIU_TRDAT, port_info->trdat);
284 port_info->trdat = 0x0;
285
286
287 /* SPB start condition: software */
288 siu_write32(base + SIU_SBACTIV, 0);
289 /* Start SPB */
290 siu_write32(base + SIU_SBCTL, 0xc0000000);
291 /* Wait for program to halt */
292 cnt = 0x10000;
293 while (--cnt && siu_read32(base + SIU_SBCTL) != 0x80000000)
294 cpu_relax();
295
296 if (!cnt)
297 return -EBUSY;
298
299 /* SPB program start address setting */
300 siu_write32(base + SIU_SBPSET, 0x00400000);
301 /* SPB hardware start(FIFOCTL source) */
302 siu_write32(base + SIU_SBACTIV, 0xc0000000);
303
304 return 0;
305 }
306
siu_dai_spbstop(struct siu_port * port_info)307 static void siu_dai_spbstop(struct siu_port *port_info)
308 {
309 struct siu_info *info = siu_i2s_data;
310 u32 __iomem *base = info->reg;
311
312 siu_write32(base + SIU_SBACTIV, 0);
313 /* SPB stop */
314 siu_write32(base + SIU_SBCTL, 0);
315
316 port_info->stfifo = 0;
317 }
318
319 /* API functions */
320
321 /* Playback and capture hardware properties are identical */
322 static const struct snd_pcm_hardware siu_dai_pcm_hw = {
323 .info = SNDRV_PCM_INFO_INTERLEAVED,
324 .formats = SNDRV_PCM_FMTBIT_S16,
325 .rates = SNDRV_PCM_RATE_8000_48000,
326 .rate_min = 8000,
327 .rate_max = 48000,
328 .channels_min = 2,
329 .channels_max = 2,
330 .buffer_bytes_max = SIU_BUFFER_BYTES_MAX,
331 .period_bytes_min = SIU_PERIOD_BYTES_MIN,
332 .period_bytes_max = SIU_PERIOD_BYTES_MAX,
333 .periods_min = SIU_PERIODS_MIN,
334 .periods_max = SIU_PERIODS_MAX,
335 };
336
siu_dai_info_volume(struct snd_kcontrol * kctrl,struct snd_ctl_elem_info * uinfo)337 static int siu_dai_info_volume(struct snd_kcontrol *kctrl,
338 struct snd_ctl_elem_info *uinfo)
339 {
340 struct siu_port *port_info = snd_kcontrol_chip(kctrl);
341
342 dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
343
344 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
345 uinfo->count = 2;
346 uinfo->value.integer.min = 0;
347 uinfo->value.integer.max = SIU_MAX_VOLUME;
348
349 return 0;
350 }
351
siu_dai_get_volume(struct snd_kcontrol * kctrl,struct snd_ctl_elem_value * ucontrol)352 static int siu_dai_get_volume(struct snd_kcontrol *kctrl,
353 struct snd_ctl_elem_value *ucontrol)
354 {
355 struct siu_port *port_info = snd_kcontrol_chip(kctrl);
356 struct device *dev = port_info->pcm->card->dev;
357 u32 vol;
358
359 dev_dbg(dev, "%s\n", __func__);
360
361 switch (kctrl->private_value) {
362 case VOLUME_PLAYBACK:
363 /* Playback is always on port 0 */
364 vol = port_info->playback.volume;
365 ucontrol->value.integer.value[0] = vol & 0xffff;
366 ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
367 break;
368 case VOLUME_CAPTURE:
369 /* Capture is always on port 1 */
370 vol = port_info->capture.volume;
371 ucontrol->value.integer.value[0] = vol & 0xffff;
372 ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
373 break;
374 default:
375 dev_err(dev, "%s() invalid private_value=%ld\n",
376 __func__, kctrl->private_value);
377 return -EINVAL;
378 }
379
380 return 0;
381 }
382
siu_dai_put_volume(struct snd_kcontrol * kctrl,struct snd_ctl_elem_value * ucontrol)383 static int siu_dai_put_volume(struct snd_kcontrol *kctrl,
384 struct snd_ctl_elem_value *ucontrol)
385 {
386 struct siu_port *port_info = snd_kcontrol_chip(kctrl);
387 struct device *dev = port_info->pcm->card->dev;
388 struct siu_info *info = siu_i2s_data;
389 u32 __iomem *base = info->reg;
390 u32 new_vol;
391 u32 cur_vol;
392
393 dev_dbg(dev, "%s\n", __func__);
394
395 if (ucontrol->value.integer.value[0] < 0 ||
396 ucontrol->value.integer.value[0] > SIU_MAX_VOLUME ||
397 ucontrol->value.integer.value[1] < 0 ||
398 ucontrol->value.integer.value[1] > SIU_MAX_VOLUME)
399 return -EINVAL;
400
401 new_vol = ucontrol->value.integer.value[0] |
402 ucontrol->value.integer.value[1] << 16;
403
404 /* See comment above - DSP firmware implementation */
405 switch (kctrl->private_value) {
406 case VOLUME_PLAYBACK:
407 /* Playback is always on port 0 */
408 cur_vol = port_info->playback.volume;
409 siu_write32(base + SIU_SBDVCA, new_vol);
410 port_info->playback.volume = new_vol;
411 break;
412 case VOLUME_CAPTURE:
413 /* Capture is always on port 1 */
414 cur_vol = port_info->capture.volume;
415 siu_write32(base + SIU_SBDVCB, new_vol);
416 port_info->capture.volume = new_vol;
417 break;
418 default:
419 dev_err(dev, "%s() invalid private_value=%ld\n",
420 __func__, kctrl->private_value);
421 return -EINVAL;
422 }
423
424 if (cur_vol != new_vol)
425 return 1;
426
427 return 0;
428 }
429
430 static const struct snd_kcontrol_new playback_controls = {
431 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
432 .name = "PCM Playback Volume",
433 .index = 0,
434 .info = siu_dai_info_volume,
435 .get = siu_dai_get_volume,
436 .put = siu_dai_put_volume,
437 .private_value = VOLUME_PLAYBACK,
438 };
439
440 static const struct snd_kcontrol_new capture_controls = {
441 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
442 .name = "PCM Capture Volume",
443 .index = 0,
444 .info = siu_dai_info_volume,
445 .get = siu_dai_get_volume,
446 .put = siu_dai_put_volume,
447 .private_value = VOLUME_CAPTURE,
448 };
449
siu_init_port(int port,struct siu_port ** port_info,struct snd_card * card)450 int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card)
451 {
452 struct device *dev = card->dev;
453 struct snd_kcontrol *kctrl;
454 int ret;
455
456 *port_info = kzalloc(sizeof(**port_info), GFP_KERNEL);
457 if (!*port_info)
458 return -ENOMEM;
459
460 dev_dbg(dev, "%s: port #%d@%p\n", __func__, port, *port_info);
461
462 (*port_info)->playback.volume = DFLT_VOLUME_LEVEL;
463 (*port_info)->capture.volume = DFLT_VOLUME_LEVEL;
464
465 /*
466 * Add mixer support. The SPB is used to change the volume. Both
467 * ports use the same SPB. Therefore, we only register one
468 * control instance since it will be used by both channels.
469 * In error case we continue without controls.
470 */
471 kctrl = snd_ctl_new1(&playback_controls, *port_info);
472 ret = snd_ctl_add(card, kctrl);
473 if (ret < 0)
474 dev_err(dev,
475 "failed to add playback controls %p port=%d err=%d\n",
476 kctrl, port, ret);
477
478 kctrl = snd_ctl_new1(&capture_controls, *port_info);
479 ret = snd_ctl_add(card, kctrl);
480 if (ret < 0)
481 dev_err(dev,
482 "failed to add capture controls %p port=%d err=%d\n",
483 kctrl, port, ret);
484
485 return 0;
486 }
487
siu_free_port(struct siu_port * port_info)488 void siu_free_port(struct siu_port *port_info)
489 {
490 kfree(port_info);
491 }
492
siu_dai_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)493 static int siu_dai_startup(struct snd_pcm_substream *substream,
494 struct snd_soc_dai *dai)
495 {
496 struct siu_info *info = snd_soc_dai_get_drvdata(dai);
497 struct snd_pcm_runtime *rt = substream->runtime;
498 struct siu_port *port_info = siu_port_info(substream);
499 int ret;
500
501 dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
502 info->port_id, port_info);
503
504 snd_soc_set_runtime_hwparams(substream, &siu_dai_pcm_hw);
505
506 ret = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
507 if (unlikely(ret < 0))
508 return ret;
509
510 siu_dai_start(port_info);
511
512 return 0;
513 }
514
siu_dai_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)515 static void siu_dai_shutdown(struct snd_pcm_substream *substream,
516 struct snd_soc_dai *dai)
517 {
518 struct siu_info *info = snd_soc_dai_get_drvdata(dai);
519 struct siu_port *port_info = siu_port_info(substream);
520
521 dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
522 info->port_id, port_info);
523
524 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
525 port_info->play_cap &= ~PLAYBACK_ENABLED;
526 else
527 port_info->play_cap &= ~CAPTURE_ENABLED;
528
529 /* Stop the siu if the other stream is not using it */
530 if (!port_info->play_cap) {
531 /* during stmread or stmwrite ? */
532 if (WARN_ON(port_info->playback.rw_flg || port_info->capture.rw_flg))
533 return;
534 siu_dai_spbstop(port_info);
535 siu_dai_stop(port_info);
536 }
537 }
538
539 /* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */
siu_dai_prepare(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)540 static int siu_dai_prepare(struct snd_pcm_substream *substream,
541 struct snd_soc_dai *dai)
542 {
543 struct siu_info *info = snd_soc_dai_get_drvdata(dai);
544 struct snd_pcm_runtime *rt = substream->runtime;
545 struct siu_port *port_info = siu_port_info(substream);
546 struct siu_stream *siu_stream;
547 int self, ret;
548
549 dev_dbg(substream->pcm->card->dev,
550 "%s: port %d, active streams %lx, %d channels\n",
551 __func__, info->port_id, port_info->play_cap, rt->channels);
552
553 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
554 self = PLAYBACK_ENABLED;
555 siu_stream = &port_info->playback;
556 } else {
557 self = CAPTURE_ENABLED;
558 siu_stream = &port_info->capture;
559 }
560
561 /* Set up the siu if not already done */
562 if (!port_info->play_cap) {
563 siu_stream->rw_flg = 0; /* stream-data transfer flag */
564
565 siu_dai_spbAselect(port_info);
566 siu_dai_spbBselect(port_info);
567
568 siu_dai_open(siu_stream);
569
570 siu_dai_pcmdatapack(siu_stream);
571
572 ret = siu_dai_spbstart(port_info);
573 if (ret < 0)
574 goto fail;
575 } else {
576 ret = 0;
577 }
578
579 port_info->play_cap |= self;
580
581 fail:
582 return ret;
583 }
584
585 /*
586 * SIU can set bus format to I2S / PCM / SPDIF independently for playback and
587 * capture, however, the current API sets the bus format globally for a DAI.
588 */
siu_dai_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)589 static int siu_dai_set_fmt(struct snd_soc_dai *dai,
590 unsigned int fmt)
591 {
592 struct siu_info *info = snd_soc_dai_get_drvdata(dai);
593 u32 __iomem *base = info->reg;
594 u32 ifctl;
595
596 dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n",
597 __func__, fmt, info->port_id);
598
599 if (info->port_id < 0)
600 return -ENODEV;
601
602 /* Here select between I2S / PCM / SPDIF */
603 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
604 case SND_SOC_DAIFMT_I2S:
605 ifctl = siu_flags[info->port_id].playback.i2s |
606 siu_flags[info->port_id].capture.i2s;
607 break;
608 case SND_SOC_DAIFMT_LEFT_J:
609 ifctl = siu_flags[info->port_id].playback.pcm |
610 siu_flags[info->port_id].capture.pcm;
611 break;
612 /* SPDIF disabled - see comment at the top */
613 default:
614 return -EINVAL;
615 }
616
617 ifctl |= ~(siu_flags[info->port_id].playback.mask |
618 siu_flags[info->port_id].capture.mask) &
619 siu_read32(base + SIU_IFCTL);
620 siu_write32(base + SIU_IFCTL, ifctl);
621
622 return 0;
623 }
624
siu_dai_set_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)625 static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
626 unsigned int freq, int dir)
627 {
628 struct clk *siu_clk, *parent_clk;
629 char *siu_name, *parent_name;
630 int ret;
631
632 if (dir != SND_SOC_CLOCK_IN)
633 return -EINVAL;
634
635 dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id);
636
637 switch (clk_id) {
638 case SIU_CLKA_PLL:
639 siu_name = "siua_clk";
640 parent_name = "pll_clk";
641 break;
642 case SIU_CLKA_EXT:
643 siu_name = "siua_clk";
644 parent_name = "siumcka_clk";
645 break;
646 case SIU_CLKB_PLL:
647 siu_name = "siub_clk";
648 parent_name = "pll_clk";
649 break;
650 case SIU_CLKB_EXT:
651 siu_name = "siub_clk";
652 parent_name = "siumckb_clk";
653 break;
654 default:
655 return -EINVAL;
656 }
657
658 siu_clk = clk_get(dai->dev, siu_name);
659 if (IS_ERR(siu_clk)) {
660 dev_err(dai->dev, "%s: cannot get a SIU clock: %ld\n", __func__,
661 PTR_ERR(siu_clk));
662 return PTR_ERR(siu_clk);
663 }
664
665 parent_clk = clk_get(dai->dev, parent_name);
666 if (IS_ERR(parent_clk)) {
667 ret = PTR_ERR(parent_clk);
668 dev_err(dai->dev, "cannot get a SIU clock parent: %d\n", ret);
669 goto epclkget;
670 }
671
672 ret = clk_set_parent(siu_clk, parent_clk);
673 if (ret < 0) {
674 dev_err(dai->dev, "cannot reparent the SIU clock: %d\n", ret);
675 goto eclksetp;
676 }
677
678 ret = clk_set_rate(siu_clk, freq);
679 if (ret < 0)
680 dev_err(dai->dev, "cannot set SIU clock rate: %d\n", ret);
681
682 /* TODO: when clkdev gets reference counting we'll move these to siu_dai_shutdown() */
683 eclksetp:
684 clk_put(parent_clk);
685 epclkget:
686 clk_put(siu_clk);
687
688 return ret;
689 }
690
691 static const struct snd_soc_dai_ops siu_dai_ops = {
692 .startup = siu_dai_startup,
693 .shutdown = siu_dai_shutdown,
694 .prepare = siu_dai_prepare,
695 .set_sysclk = siu_dai_set_sysclk,
696 .set_fmt = siu_dai_set_fmt,
697 };
698
699 static struct snd_soc_dai_driver siu_i2s_dai = {
700 .name = "siu-i2s-dai",
701 .playback = {
702 .channels_min = 2,
703 .channels_max = 2,
704 .formats = SNDRV_PCM_FMTBIT_S16,
705 .rates = SNDRV_PCM_RATE_8000_48000,
706 },
707 .capture = {
708 .channels_min = 2,
709 .channels_max = 2,
710 .formats = SNDRV_PCM_FMTBIT_S16,
711 .rates = SNDRV_PCM_RATE_8000_48000,
712 },
713 .ops = &siu_dai_ops,
714 };
715
siu_probe(struct platform_device * pdev)716 static int siu_probe(struct platform_device *pdev)
717 {
718 const struct firmware *fw_entry;
719 struct resource *res, *region;
720 struct siu_info *info;
721 int ret;
722
723 info = devm_kmalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
724 if (!info)
725 return -ENOMEM;
726 siu_i2s_data = info;
727 info->dev = &pdev->dev;
728
729 ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev);
730 if (ret)
731 return ret;
732
733 /*
734 * Loaded firmware is "const" - read only, but we have to modify it in
735 * snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect()
736 */
737 memcpy(&info->fw, fw_entry->data, fw_entry->size);
738
739 release_firmware(fw_entry);
740
741 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
742 if (!res)
743 return -ENODEV;
744
745 region = devm_request_mem_region(&pdev->dev, res->start,
746 resource_size(res), pdev->name);
747 if (!region) {
748 dev_err(&pdev->dev, "SIU region already claimed\n");
749 return -EBUSY;
750 }
751
752 info->pram = devm_ioremap(&pdev->dev, res->start, PRAM_SIZE);
753 if (!info->pram)
754 return -ENOMEM;
755 info->xram = devm_ioremap(&pdev->dev, res->start + XRAM_OFFSET,
756 XRAM_SIZE);
757 if (!info->xram)
758 return -ENOMEM;
759 info->yram = devm_ioremap(&pdev->dev, res->start + YRAM_OFFSET,
760 YRAM_SIZE);
761 if (!info->yram)
762 return -ENOMEM;
763 info->reg = devm_ioremap(&pdev->dev, res->start + REG_OFFSET,
764 resource_size(res) - REG_OFFSET);
765 if (!info->reg)
766 return -ENOMEM;
767
768 dev_set_drvdata(&pdev->dev, info);
769
770 /* register using ARRAY version so we can keep dai name */
771 ret = devm_snd_soc_register_component(&pdev->dev, &siu_component,
772 &siu_i2s_dai, 1);
773 if (ret < 0)
774 return ret;
775
776 pm_runtime_enable(&pdev->dev);
777
778 return 0;
779 }
780
siu_remove(struct platform_device * pdev)781 static void siu_remove(struct platform_device *pdev)
782 {
783 pm_runtime_disable(&pdev->dev);
784 }
785
786 static struct platform_driver siu_driver = {
787 .driver = {
788 .name = "siu-pcm-audio",
789 },
790 .probe = siu_probe,
791 .remove_new = siu_remove,
792 };
793
794 module_platform_driver(siu_driver);
795
796 MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
797 MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
798 MODULE_LICENSE("GPL");
799
800 MODULE_FIRMWARE("siu_spb.bin");
801
