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TOMOYO Linux Cross Reference
Linux/sound/soc/sh/siu_dai.c

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  1 /*
  2  * siu_dai.c - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
  3  *
  4  * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
  5  * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; either version 2 of the License, or
 10  * (at your option) any later version.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  *
 17  * You should have received a copy of the GNU General Public License
 18  * along with this program; if not, write to the Free Software
 19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 20  */
 21 
 22 #include <linux/delay.h>
 23 #include <linux/firmware.h>
 24 #include <linux/pm_runtime.h>
 25 #include <linux/slab.h>
 26 #include <linux/module.h>
 27 
 28 #include <asm/clock.h>
 29 #include <asm/siu.h>
 30 
 31 #include <sound/control.h>
 32 #include <sound/soc.h>
 33 
 34 #include "siu.h"
 35 
 36 /* Board specifics */
 37 #if defined(CONFIG_CPU_SUBTYPE_SH7722)
 38 # define SIU_MAX_VOLUME         0x1000
 39 #else
 40 # define SIU_MAX_VOLUME         0x7fff
 41 #endif
 42 
 43 #define PRAM_SIZE       0x2000
 44 #define XRAM_SIZE       0x800
 45 #define YRAM_SIZE       0x800
 46 
 47 #define XRAM_OFFSET     0x4000
 48 #define YRAM_OFFSET     0x6000
 49 #define REG_OFFSET      0xc000
 50 
 51 #define PLAYBACK_ENABLED        1
 52 #define CAPTURE_ENABLED         2
 53 
 54 #define VOLUME_CAPTURE          0
 55 #define VOLUME_PLAYBACK         1
 56 #define DFLT_VOLUME_LEVEL       0x08000800
 57 
 58 /*
 59  * SPDIF is only available on port A and on some SIU implementations it is only
 60  * available for input. Due to the lack of hardware to test it, SPDIF is left
 61  * disabled in this driver version
 62  */
 63 struct format_flag {
 64         u32     i2s;
 65         u32     pcm;
 66         u32     spdif;
 67         u32     mask;
 68 };
 69 
 70 struct port_flag {
 71         struct format_flag      playback;
 72         struct format_flag      capture;
 73 };
 74 
 75 struct siu_info *siu_i2s_data;
 76 
 77 static struct port_flag siu_flags[SIU_PORT_NUM] = {
 78         [SIU_PORT_A] = {
 79                 .playback = {
 80                         .i2s    = 0x50000000,
 81                         .pcm    = 0x40000000,
 82                         .spdif  = 0x80000000,   /* not on all SIU versions */
 83                         .mask   = 0xd0000000,
 84                 },
 85                 .capture = {
 86                         .i2s    = 0x05000000,
 87                         .pcm    = 0x04000000,
 88                         .spdif  = 0x08000000,
 89                         .mask   = 0x0d000000,
 90                 },
 91         },
 92         [SIU_PORT_B] = {
 93                 .playback = {
 94                         .i2s    = 0x00500000,
 95                         .pcm    = 0x00400000,
 96                         .spdif  = 0,            /* impossible - turn off */
 97                         .mask   = 0x00500000,
 98                 },
 99                 .capture = {
100                         .i2s    = 0x00050000,
101                         .pcm    = 0x00040000,
102                         .spdif  = 0,            /* impossible - turn off */
103                         .mask   = 0x00050000,
104                 },
105         },
106 };
107 
108 static void siu_dai_start(struct siu_port *port_info)
109 {
110         struct siu_info *info = siu_i2s_data;
111         u32 __iomem *base = info->reg;
112 
113         dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
114 
115         /* Issue software reset to siu */
116         siu_write32(base + SIU_SRCTL, 0);
117 
118         /* Wait for the reset to take effect */
119         udelay(1);
120 
121         port_info->stfifo = 0;
122         port_info->trdat = 0;
123 
124         /* portA, portB, SIU operate */
125         siu_write32(base + SIU_SRCTL, 0x301);
126 
127         /* portA=256fs, portB=256fs */
128         siu_write32(base + SIU_CKCTL, 0x40400000);
129 
130         /* portA's BRG does not divide SIUCKA */
131         siu_write32(base + SIU_BRGASEL, 0);
132         siu_write32(base + SIU_BRRA, 0);
133 
134         /* portB's BRG divides SIUCKB by half */
135         siu_write32(base + SIU_BRGBSEL, 1);
136         siu_write32(base + SIU_BRRB, 0);
137 
138         siu_write32(base + SIU_IFCTL, 0x44440000);
139 
140         /* portA: 32 bit/fs, master; portB: 32 bit/fs, master */
141         siu_write32(base + SIU_SFORM, 0x0c0c0000);
142 
143         /*
144          * Volume levels: looks like the DSP firmware implements volume controls
145          * differently from what's described in the datasheet
146          */
147         siu_write32(base + SIU_SBDVCA, port_info->playback.volume);
148         siu_write32(base + SIU_SBDVCB, port_info->capture.volume);
149 }
150 
151 static void siu_dai_stop(struct siu_port *port_info)
152 {
153         struct siu_info *info = siu_i2s_data;
154         u32 __iomem *base = info->reg;
155 
156         /* SIU software reset */
157         siu_write32(base + SIU_SRCTL, 0);
158 }
159 
160 static void siu_dai_spbAselect(struct siu_port *port_info)
161 {
162         struct siu_info *info = siu_i2s_data;
163         struct siu_firmware *fw = &info->fw;
164         u32 *ydef = fw->yram0;
165         u32 idx;
166 
167         /* path A use */
168         if (!info->port_id)
169                 idx = 1;                /* portA */
170         else
171                 idx = 2;                /* portB */
172 
173         ydef[0] = (fw->spbpar[idx].ab1a << 16) |
174                 (fw->spbpar[idx].ab0a << 8) |
175                 (fw->spbpar[idx].dir << 7) | 3;
176         ydef[1] = fw->yram0[1]; /* 0x03000300 */
177         ydef[2] = (16 / 2) << 24;
178         ydef[3] = fw->yram0[3]; /* 0 */
179         ydef[4] = fw->yram0[4]; /* 0 */
180         ydef[7] = fw->spbpar[idx].event;
181         port_info->stfifo |= fw->spbpar[idx].stfifo;
182         port_info->trdat |= fw->spbpar[idx].trdat;
183 }
184 
185 static void siu_dai_spbBselect(struct siu_port *port_info)
186 {
187         struct siu_info *info = siu_i2s_data;
188         struct siu_firmware *fw = &info->fw;
189         u32 *ydef = fw->yram0;
190         u32 idx;
191 
192         /* path B use */
193         if (!info->port_id)
194                 idx = 7;                /* portA */
195         else
196                 idx = 8;                /* portB */
197 
198         ydef[5] = (fw->spbpar[idx].ab1a << 16) |
199                 (fw->spbpar[idx].ab0a << 8) | 1;
200         ydef[6] = fw->spbpar[idx].event;
201         port_info->stfifo |= fw->spbpar[idx].stfifo;
202         port_info->trdat |= fw->spbpar[idx].trdat;
203 }
204 
205 static void siu_dai_open(struct siu_stream *siu_stream)
206 {
207         struct siu_info *info = siu_i2s_data;
208         u32 __iomem *base = info->reg;
209         u32 srctl, ifctl;
210 
211         srctl = siu_read32(base + SIU_SRCTL);
212         ifctl = siu_read32(base + SIU_IFCTL);
213 
214         switch (info->port_id) {
215         case SIU_PORT_A:
216                 /* portA operates */
217                 srctl |= 0x200;
218                 ifctl &= ~0xc2;
219                 break;
220         case SIU_PORT_B:
221                 /* portB operates */
222                 srctl |= 0x100;
223                 ifctl &= ~0x31;
224                 break;
225         }
226 
227         siu_write32(base + SIU_SRCTL, srctl);
228         /* Unmute and configure portA */
229         siu_write32(base + SIU_IFCTL, ifctl);
230 }
231 
232 /*
233  * At the moment only fixed Left-upper, Left-lower, Right-upper, Right-lower
234  * packing is supported
235  */
236 static void siu_dai_pcmdatapack(struct siu_stream *siu_stream)
237 {
238         struct siu_info *info = siu_i2s_data;
239         u32 __iomem *base = info->reg;
240         u32 dpak;
241 
242         dpak = siu_read32(base + SIU_DPAK);
243 
244         switch (info->port_id) {
245         case SIU_PORT_A:
246                 dpak &= ~0xc0000000;
247                 break;
248         case SIU_PORT_B:
249                 dpak &= ~0x00c00000;
250                 break;
251         }
252 
253         siu_write32(base + SIU_DPAK, dpak);
254 }
255 
256 static int siu_dai_spbstart(struct siu_port *port_info)
257 {
258         struct siu_info *info = siu_i2s_data;
259         u32 __iomem *base = info->reg;
260         struct siu_firmware *fw = &info->fw;
261         u32 *ydef = fw->yram0;
262         int cnt;
263         u32 __iomem *add;
264         u32 *ptr;
265 
266         /* Load SPB Program in PRAM */
267         ptr = fw->pram0;
268         add = info->pram;
269         for (cnt = 0; cnt < PRAM0_SIZE; cnt++, add++, ptr++)
270                 siu_write32(add, *ptr);
271 
272         ptr = fw->pram1;
273         add = info->pram + (0x0100 / sizeof(u32));
274         for (cnt = 0; cnt < PRAM1_SIZE; cnt++, add++, ptr++)
275                 siu_write32(add, *ptr);
276 
277         /* XRAM initialization */
278         add = info->xram;
279         for (cnt = 0; cnt < XRAM0_SIZE + XRAM1_SIZE + XRAM2_SIZE; cnt++, add++)
280                 siu_write32(add, 0);
281 
282         /* YRAM variable area initialization */
283         add = info->yram;
284         for (cnt = 0; cnt < YRAM_DEF_SIZE; cnt++, add++)
285                 siu_write32(add, ydef[cnt]);
286 
287         /* YRAM FIR coefficient area initialization */
288         add = info->yram + (0x0200 / sizeof(u32));
289         for (cnt = 0; cnt < YRAM_FIR_SIZE; cnt++, add++)
290                 siu_write32(add, fw->yram_fir_coeff[cnt]);
291 
292         /* YRAM IIR coefficient area initialization */
293         add = info->yram + (0x0600 / sizeof(u32));
294         for (cnt = 0; cnt < YRAM_IIR_SIZE; cnt++, add++)
295                 siu_write32(add, 0);
296 
297         siu_write32(base + SIU_TRDAT, port_info->trdat);
298         port_info->trdat = 0x0;
299 
300 
301         /* SPB start condition: software */
302         siu_write32(base + SIU_SBACTIV, 0);
303         /* Start SPB */
304         siu_write32(base + SIU_SBCTL, 0xc0000000);
305         /* Wait for program to halt */
306         cnt = 0x10000;
307         while (--cnt && siu_read32(base + SIU_SBCTL) != 0x80000000)
308                 cpu_relax();
309 
310         if (!cnt)
311                 return -EBUSY;
312 
313         /* SPB program start address setting */
314         siu_write32(base + SIU_SBPSET, 0x00400000);
315         /* SPB hardware start(FIFOCTL source) */
316         siu_write32(base + SIU_SBACTIV, 0xc0000000);
317 
318         return 0;
319 }
320 
321 static void siu_dai_spbstop(struct siu_port *port_info)
322 {
323         struct siu_info *info = siu_i2s_data;
324         u32 __iomem *base = info->reg;
325 
326         siu_write32(base + SIU_SBACTIV, 0);
327         /* SPB stop */
328         siu_write32(base + SIU_SBCTL, 0);
329 
330         port_info->stfifo = 0;
331 }
332 
333 /*              API functions           */
334 
335 /* Playback and capture hardware properties are identical */
336 static struct snd_pcm_hardware siu_dai_pcm_hw = {
337         .info                   = SNDRV_PCM_INFO_INTERLEAVED,
338         .formats                = SNDRV_PCM_FMTBIT_S16,
339         .rates                  = SNDRV_PCM_RATE_8000_48000,
340         .rate_min               = 8000,
341         .rate_max               = 48000,
342         .channels_min           = 2,
343         .channels_max           = 2,
344         .buffer_bytes_max       = SIU_BUFFER_BYTES_MAX,
345         .period_bytes_min       = SIU_PERIOD_BYTES_MIN,
346         .period_bytes_max       = SIU_PERIOD_BYTES_MAX,
347         .periods_min            = SIU_PERIODS_MIN,
348         .periods_max            = SIU_PERIODS_MAX,
349 };
350 
351 static int siu_dai_info_volume(struct snd_kcontrol *kctrl,
352                                struct snd_ctl_elem_info *uinfo)
353 {
354         struct siu_port *port_info = snd_kcontrol_chip(kctrl);
355 
356         dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
357 
358         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
359         uinfo->count = 2;
360         uinfo->value.integer.min = 0;
361         uinfo->value.integer.max = SIU_MAX_VOLUME;
362 
363         return 0;
364 }
365 
366 static int siu_dai_get_volume(struct snd_kcontrol *kctrl,
367                               struct snd_ctl_elem_value *ucontrol)
368 {
369         struct siu_port *port_info = snd_kcontrol_chip(kctrl);
370         struct device *dev = port_info->pcm->card->dev;
371         u32 vol;
372 
373         dev_dbg(dev, "%s\n", __func__);
374 
375         switch (kctrl->private_value) {
376         case VOLUME_PLAYBACK:
377                 /* Playback is always on port 0 */
378                 vol = port_info->playback.volume;
379                 ucontrol->value.integer.value[0] = vol & 0xffff;
380                 ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
381                 break;
382         case VOLUME_CAPTURE:
383                 /* Capture is always on port 1 */
384                 vol = port_info->capture.volume;
385                 ucontrol->value.integer.value[0] = vol & 0xffff;
386                 ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
387                 break;
388         default:
389                 dev_err(dev, "%s() invalid private_value=%ld\n",
390                         __func__, kctrl->private_value);
391                 return -EINVAL;
392         }
393 
394         return 0;
395 }
396 
397 static int siu_dai_put_volume(struct snd_kcontrol *kctrl,
398                               struct snd_ctl_elem_value *ucontrol)
399 {
400         struct siu_port *port_info = snd_kcontrol_chip(kctrl);
401         struct device *dev = port_info->pcm->card->dev;
402         struct siu_info *info = siu_i2s_data;
403         u32 __iomem *base = info->reg;
404         u32 new_vol;
405         u32 cur_vol;
406 
407         dev_dbg(dev, "%s\n", __func__);
408 
409         if (ucontrol->value.integer.value[0] < 0 ||
410             ucontrol->value.integer.value[0] > SIU_MAX_VOLUME ||
411             ucontrol->value.integer.value[1] < 0 ||
412             ucontrol->value.integer.value[1] > SIU_MAX_VOLUME)
413                 return -EINVAL;
414 
415         new_vol = ucontrol->value.integer.value[0] |
416                 ucontrol->value.integer.value[1] << 16;
417 
418         /* See comment above - DSP firmware implementation */
419         switch (kctrl->private_value) {
420         case VOLUME_PLAYBACK:
421                 /* Playback is always on port 0 */
422                 cur_vol = port_info->playback.volume;
423                 siu_write32(base + SIU_SBDVCA, new_vol);
424                 port_info->playback.volume = new_vol;
425                 break;
426         case VOLUME_CAPTURE:
427                 /* Capture is always on port 1 */
428                 cur_vol = port_info->capture.volume;
429                 siu_write32(base + SIU_SBDVCB, new_vol);
430                 port_info->capture.volume = new_vol;
431                 break;
432         default:
433                 dev_err(dev, "%s() invalid private_value=%ld\n",
434                         __func__, kctrl->private_value);
435                 return -EINVAL;
436         }
437 
438         if (cur_vol != new_vol)
439                 return 1;
440 
441         return 0;
442 }
443 
444 static struct snd_kcontrol_new playback_controls = {
445         .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
446         .name           = "PCM Playback Volume",
447         .index          = 0,
448         .info           = siu_dai_info_volume,
449         .get            = siu_dai_get_volume,
450         .put            = siu_dai_put_volume,
451         .private_value  = VOLUME_PLAYBACK,
452 };
453 
454 static struct snd_kcontrol_new capture_controls = {
455         .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
456         .name           = "PCM Capture Volume",
457         .index          = 0,
458         .info           = siu_dai_info_volume,
459         .get            = siu_dai_get_volume,
460         .put            = siu_dai_put_volume,
461         .private_value  = VOLUME_CAPTURE,
462 };
463 
464 int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card)
465 {
466         struct device *dev = card->dev;
467         struct snd_kcontrol *kctrl;
468         int ret;
469 
470         *port_info = kzalloc(sizeof(**port_info), GFP_KERNEL);
471         if (!*port_info)
472                 return -ENOMEM;
473 
474         dev_dbg(dev, "%s: port #%d@%p\n", __func__, port, *port_info);
475 
476         (*port_info)->playback.volume = DFLT_VOLUME_LEVEL;
477         (*port_info)->capture.volume = DFLT_VOLUME_LEVEL;
478 
479         /*
480          * Add mixer support. The SPB is used to change the volume. Both
481          * ports use the same SPB. Therefore, we only register one
482          * control instance since it will be used by both channels.
483          * In error case we continue without controls.
484          */
485         kctrl = snd_ctl_new1(&playback_controls, *port_info);
486         ret = snd_ctl_add(card, kctrl);
487         if (ret < 0)
488                 dev_err(dev,
489                         "failed to add playback controls %p port=%d err=%d\n",
490                         kctrl, port, ret);
491 
492         kctrl = snd_ctl_new1(&capture_controls, *port_info);
493         ret = snd_ctl_add(card, kctrl);
494         if (ret < 0)
495                 dev_err(dev,
496                         "failed to add capture controls %p port=%d err=%d\n",
497                         kctrl, port, ret);
498 
499         return 0;
500 }
501 
502 void siu_free_port(struct siu_port *port_info)
503 {
504         kfree(port_info);
505 }
506 
507 static int siu_dai_startup(struct snd_pcm_substream *substream,
508                            struct snd_soc_dai *dai)
509 {
510         struct siu_info *info = snd_soc_dai_get_drvdata(dai);
511         struct snd_pcm_runtime *rt = substream->runtime;
512         struct siu_port *port_info = siu_port_info(substream);
513         int ret;
514 
515         dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
516                 info->port_id, port_info);
517 
518         snd_soc_set_runtime_hwparams(substream, &siu_dai_pcm_hw);
519 
520         ret = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
521         if (unlikely(ret < 0))
522                 return ret;
523 
524         siu_dai_start(port_info);
525 
526         return 0;
527 }
528 
529 static void siu_dai_shutdown(struct snd_pcm_substream *substream,
530                              struct snd_soc_dai *dai)
531 {
532         struct siu_info *info = snd_soc_dai_get_drvdata(dai);
533         struct siu_port *port_info = siu_port_info(substream);
534 
535         dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
536                 info->port_id, port_info);
537 
538         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
539                 port_info->play_cap &= ~PLAYBACK_ENABLED;
540         else
541                 port_info->play_cap &= ~CAPTURE_ENABLED;
542 
543         /* Stop the siu if the other stream is not using it */
544         if (!port_info->play_cap) {
545                 /* during stmread or stmwrite ? */
546                 BUG_ON(port_info->playback.rw_flg || port_info->capture.rw_flg);
547                 siu_dai_spbstop(port_info);
548                 siu_dai_stop(port_info);
549         }
550 }
551 
552 /* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */
553 static int siu_dai_prepare(struct snd_pcm_substream *substream,
554                            struct snd_soc_dai *dai)
555 {
556         struct siu_info *info = snd_soc_dai_get_drvdata(dai);
557         struct snd_pcm_runtime *rt = substream->runtime;
558         struct siu_port *port_info = siu_port_info(substream);
559         struct siu_stream *siu_stream;
560         int self, ret;
561 
562         dev_dbg(substream->pcm->card->dev,
563                 "%s: port %d, active streams %lx, %d channels\n",
564                 __func__, info->port_id, port_info->play_cap, rt->channels);
565 
566         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
567                 self = PLAYBACK_ENABLED;
568                 siu_stream = &port_info->playback;
569         } else {
570                 self = CAPTURE_ENABLED;
571                 siu_stream = &port_info->capture;
572         }
573 
574         /* Set up the siu if not already done */
575         if (!port_info->play_cap) {
576                 siu_stream->rw_flg = 0; /* stream-data transfer flag */
577 
578                 siu_dai_spbAselect(port_info);
579                 siu_dai_spbBselect(port_info);
580 
581                 siu_dai_open(siu_stream);
582 
583                 siu_dai_pcmdatapack(siu_stream);
584 
585                 ret = siu_dai_spbstart(port_info);
586                 if (ret < 0)
587                         goto fail;
588         } else {
589                 ret = 0;
590         }
591 
592         port_info->play_cap |= self;
593 
594 fail:
595         return ret;
596 }
597 
598 /*
599  * SIU can set bus format to I2S / PCM / SPDIF independently for playback and
600  * capture, however, the current API sets the bus format globally for a DAI.
601  */
602 static int siu_dai_set_fmt(struct snd_soc_dai *dai,
603                            unsigned int fmt)
604 {
605         struct siu_info *info = snd_soc_dai_get_drvdata(dai);
606         u32 __iomem *base = info->reg;
607         u32 ifctl;
608 
609         dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n",
610                 __func__, fmt, info->port_id);
611 
612         if (info->port_id < 0)
613                 return -ENODEV;
614 
615         /* Here select between I2S / PCM / SPDIF */
616         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
617         case SND_SOC_DAIFMT_I2S:
618                 ifctl = siu_flags[info->port_id].playback.i2s |
619                         siu_flags[info->port_id].capture.i2s;
620                 break;
621         case SND_SOC_DAIFMT_LEFT_J:
622                 ifctl = siu_flags[info->port_id].playback.pcm |
623                         siu_flags[info->port_id].capture.pcm;
624                 break;
625         /* SPDIF disabled - see comment at the top */
626         default:
627                 return -EINVAL;
628         }
629 
630         ifctl |= ~(siu_flags[info->port_id].playback.mask |
631                    siu_flags[info->port_id].capture.mask) &
632                 siu_read32(base + SIU_IFCTL);
633         siu_write32(base + SIU_IFCTL, ifctl);
634 
635         return 0;
636 }
637 
638 static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
639                               unsigned int freq, int dir)
640 {
641         struct clk *siu_clk, *parent_clk;
642         char *siu_name, *parent_name;
643         int ret;
644 
645         if (dir != SND_SOC_CLOCK_IN)
646                 return -EINVAL;
647 
648         dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id);
649 
650         switch (clk_id) {
651         case SIU_CLKA_PLL:
652                 siu_name = "siua_clk";
653                 parent_name = "pll_clk";
654                 break;
655         case SIU_CLKA_EXT:
656                 siu_name = "siua_clk";
657                 parent_name = "siumcka_clk";
658                 break;
659         case SIU_CLKB_PLL:
660                 siu_name = "siub_clk";
661                 parent_name = "pll_clk";
662                 break;
663         case SIU_CLKB_EXT:
664                 siu_name = "siub_clk";
665                 parent_name = "siumckb_clk";
666                 break;
667         default:
668                 return -EINVAL;
669         }
670 
671         siu_clk = clk_get(dai->dev, siu_name);
672         if (IS_ERR(siu_clk)) {
673                 dev_err(dai->dev, "%s: cannot get a SIU clock: %ld\n", __func__,
674                         PTR_ERR(siu_clk));
675                 return PTR_ERR(siu_clk);
676         }
677 
678         parent_clk = clk_get(dai->dev, parent_name);
679         if (IS_ERR(parent_clk)) {
680                 ret = PTR_ERR(parent_clk);
681                 dev_err(dai->dev, "cannot get a SIU clock parent: %d\n", ret);
682                 goto epclkget;
683         }
684 
685         ret = clk_set_parent(siu_clk, parent_clk);
686         if (ret < 0) {
687                 dev_err(dai->dev, "cannot reparent the SIU clock: %d\n", ret);
688                 goto eclksetp;
689         }
690 
691         ret = clk_set_rate(siu_clk, freq);
692         if (ret < 0)
693                 dev_err(dai->dev, "cannot set SIU clock rate: %d\n", ret);
694 
695         /* TODO: when clkdev gets reference counting we'll move these to siu_dai_shutdown() */
696 eclksetp:
697         clk_put(parent_clk);
698 epclkget:
699         clk_put(siu_clk);
700 
701         return ret;
702 }
703 
704 static const struct snd_soc_dai_ops siu_dai_ops = {
705         .startup        = siu_dai_startup,
706         .shutdown       = siu_dai_shutdown,
707         .prepare        = siu_dai_prepare,
708         .set_sysclk     = siu_dai_set_sysclk,
709         .set_fmt        = siu_dai_set_fmt,
710 };
711 
712 static struct snd_soc_dai_driver siu_i2s_dai = {
713         .name   = "siu-i2s-dai",
714         .playback = {
715                 .channels_min = 2,
716                 .channels_max = 2,
717                 .formats = SNDRV_PCM_FMTBIT_S16,
718                 .rates = SNDRV_PCM_RATE_8000_48000,
719         },
720         .capture = {
721                 .channels_min = 2,
722                 .channels_max = 2,
723                 .formats = SNDRV_PCM_FMTBIT_S16,
724                 .rates = SNDRV_PCM_RATE_8000_48000,
725          },
726         .ops = &siu_dai_ops,
727 };
728 
729 static int __devinit siu_probe(struct platform_device *pdev)
730 {
731         const struct firmware *fw_entry;
732         struct resource *res, *region;
733         struct siu_info *info;
734         int ret;
735 
736         info = kmalloc(sizeof(*info), GFP_KERNEL);
737         if (!info)
738                 return -ENOMEM;
739         siu_i2s_data = info;
740         info->dev = &pdev->dev;
741 
742         ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev);
743         if (ret)
744                 goto ereqfw;
745 
746         /*
747          * Loaded firmware is "const" - read only, but we have to modify it in
748          * snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect()
749          */
750         memcpy(&info->fw, fw_entry->data, fw_entry->size);
751 
752         release_firmware(fw_entry);
753 
754         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
755         if (!res) {
756                 ret = -ENODEV;
757                 goto egetres;
758         }
759 
760         region = request_mem_region(res->start, resource_size(res),
761                                     pdev->name);
762         if (!region) {
763                 dev_err(&pdev->dev, "SIU region already claimed\n");
764                 ret = -EBUSY;
765                 goto ereqmemreg;
766         }
767 
768         ret = -ENOMEM;
769         info->pram = ioremap(res->start, PRAM_SIZE);
770         if (!info->pram)
771                 goto emappram;
772         info->xram = ioremap(res->start + XRAM_OFFSET, XRAM_SIZE);
773         if (!info->xram)
774                 goto emapxram;
775         info->yram = ioremap(res->start + YRAM_OFFSET, YRAM_SIZE);
776         if (!info->yram)
777                 goto emapyram;
778         info->reg = ioremap(res->start + REG_OFFSET, resource_size(res) -
779                             REG_OFFSET);
780         if (!info->reg)
781                 goto emapreg;
782 
783         dev_set_drvdata(&pdev->dev, info);
784 
785         /* register using ARRAY version so we can keep dai name */
786         ret = snd_soc_register_dais(&pdev->dev, &siu_i2s_dai, 1);
787         if (ret < 0)
788                 goto edaiinit;
789 
790         ret = snd_soc_register_platform(&pdev->dev, &siu_platform);
791         if (ret < 0)
792                 goto esocregp;
793 
794         pm_runtime_enable(&pdev->dev);
795 
796         return ret;
797 
798 esocregp:
799         snd_soc_unregister_dai(&pdev->dev);
800 edaiinit:
801         iounmap(info->reg);
802 emapreg:
803         iounmap(info->yram);
804 emapyram:
805         iounmap(info->xram);
806 emapxram:
807         iounmap(info->pram);
808 emappram:
809         release_mem_region(res->start, resource_size(res));
810 ereqmemreg:
811 egetres:
812 ereqfw:
813         kfree(info);
814 
815         return ret;
816 }
817 
818 static int __devexit siu_remove(struct platform_device *pdev)
819 {
820         struct siu_info *info = dev_get_drvdata(&pdev->dev);
821         struct resource *res;
822 
823         pm_runtime_disable(&pdev->dev);
824 
825         snd_soc_unregister_platform(&pdev->dev);
826         snd_soc_unregister_dai(&pdev->dev);
827 
828         iounmap(info->reg);
829         iounmap(info->yram);
830         iounmap(info->xram);
831         iounmap(info->pram);
832         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
833         if (res)
834                 release_mem_region(res->start, resource_size(res));
835         kfree(info);
836 
837         return 0;
838 }
839 
840 static struct platform_driver siu_driver = {
841         .driver         = {
842                 .owner  = THIS_MODULE,
843                 .name   = "siu-pcm-audio",
844         },
845         .probe          = siu_probe,
846         .remove         = __devexit_p(siu_remove),
847 };
848 
849 module_platform_driver(siu_driver);
850 
851 MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
852 MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
853 MODULE_LICENSE("GPL");
854 

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