~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

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

Version: ~ [ linux-6.11-rc3 ] ~ [ linux-6.10.4 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.45 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.104 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.164 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.223 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.281 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.319 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 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 
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 
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 
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 
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  */
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 
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 
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 
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 
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 
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 
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 
488 void siu_free_port(struct siu_port *port_info)
489 {
490         kfree(port_info);
491 }
492 
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 
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() */
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  */
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 
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 
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 
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 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

sflogo.php