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 if (WARN_ON(port_info->playback.rw_flg || port_info->capture.rw_flg)) 547 return; 548 siu_dai_spbstop(port_info); 549 siu_dai_stop(port_info); 550 } 551 } 552 553 /* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */ 554 static int siu_dai_prepare(struct snd_pcm_substream *substream, 555 struct snd_soc_dai *dai) 556 { 557 struct siu_info *info = snd_soc_dai_get_drvdata(dai); 558 struct snd_pcm_runtime *rt = substream->runtime; 559 struct siu_port *port_info = siu_port_info(substream); 560 struct siu_stream *siu_stream; 561 int self, ret; 562 563 dev_dbg(substream->pcm->card->dev, 564 "%s: port %d, active streams %lx, %d channels\n", 565 __func__, info->port_id, port_info->play_cap, rt->channels); 566 567 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 568 self = PLAYBACK_ENABLED; 569 siu_stream = &port_info->playback; 570 } else { 571 self = CAPTURE_ENABLED; 572 siu_stream = &port_info->capture; 573 } 574 575 /* Set up the siu if not already done */ 576 if (!port_info->play_cap) { 577 siu_stream->rw_flg = 0; /* stream-data transfer flag */ 578 579 siu_dai_spbAselect(port_info); 580 siu_dai_spbBselect(port_info); 581 582 siu_dai_open(siu_stream); 583 584 siu_dai_pcmdatapack(siu_stream); 585 586 ret = siu_dai_spbstart(port_info); 587 if (ret < 0) 588 goto fail; 589 } else { 590 ret = 0; 591 } 592 593 port_info->play_cap |= self; 594 595 fail: 596 return ret; 597 } 598 599 /* 600 * SIU can set bus format to I2S / PCM / SPDIF independently for playback and 601 * capture, however, the current API sets the bus format globally for a DAI. 602 */ 603 static int siu_dai_set_fmt(struct snd_soc_dai *dai, 604 unsigned int fmt) 605 { 606 struct siu_info *info = snd_soc_dai_get_drvdata(dai); 607 u32 __iomem *base = info->reg; 608 u32 ifctl; 609 610 dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n", 611 __func__, fmt, info->port_id); 612 613 if (info->port_id < 0) 614 return -ENODEV; 615 616 /* Here select between I2S / PCM / SPDIF */ 617 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 618 case SND_SOC_DAIFMT_I2S: 619 ifctl = siu_flags[info->port_id].playback.i2s | 620 siu_flags[info->port_id].capture.i2s; 621 break; 622 case SND_SOC_DAIFMT_LEFT_J: 623 ifctl = siu_flags[info->port_id].playback.pcm | 624 siu_flags[info->port_id].capture.pcm; 625 break; 626 /* SPDIF disabled - see comment at the top */ 627 default: 628 return -EINVAL; 629 } 630 631 ifctl |= ~(siu_flags[info->port_id].playback.mask | 632 siu_flags[info->port_id].capture.mask) & 633 siu_read32(base + SIU_IFCTL); 634 siu_write32(base + SIU_IFCTL, ifctl); 635 636 return 0; 637 } 638 639 static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id, 640 unsigned int freq, int dir) 641 { 642 struct clk *siu_clk, *parent_clk; 643 char *siu_name, *parent_name; 644 int ret; 645 646 if (dir != SND_SOC_CLOCK_IN) 647 return -EINVAL; 648 649 dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id); 650 651 switch (clk_id) { 652 case SIU_CLKA_PLL: 653 siu_name = "siua_clk"; 654 parent_name = "pll_clk"; 655 break; 656 case SIU_CLKA_EXT: 657 siu_name = "siua_clk"; 658 parent_name = "siumcka_clk"; 659 break; 660 case SIU_CLKB_PLL: 661 siu_name = "siub_clk"; 662 parent_name = "pll_clk"; 663 break; 664 case SIU_CLKB_EXT: 665 siu_name = "siub_clk"; 666 parent_name = "siumckb_clk"; 667 break; 668 default: 669 return -EINVAL; 670 } 671 672 siu_clk = clk_get(dai->dev, siu_name); 673 if (IS_ERR(siu_clk)) { 674 dev_err(dai->dev, "%s: cannot get a SIU clock: %ld\n", __func__, 675 PTR_ERR(siu_clk)); 676 return PTR_ERR(siu_clk); 677 } 678 679 parent_clk = clk_get(dai->dev, parent_name); 680 if (IS_ERR(parent_clk)) { 681 ret = PTR_ERR(parent_clk); 682 dev_err(dai->dev, "cannot get a SIU clock parent: %d\n", ret); 683 goto epclkget; 684 } 685 686 ret = clk_set_parent(siu_clk, parent_clk); 687 if (ret < 0) { 688 dev_err(dai->dev, "cannot reparent the SIU clock: %d\n", ret); 689 goto eclksetp; 690 } 691 692 ret = clk_set_rate(siu_clk, freq); 693 if (ret < 0) 694 dev_err(dai->dev, "cannot set SIU clock rate: %d\n", ret); 695 696 /* TODO: when clkdev gets reference counting we'll move these to siu_dai_shutdown() */ 697 eclksetp: 698 clk_put(parent_clk); 699 epclkget: 700 clk_put(siu_clk); 701 702 return ret; 703 } 704 705 static const struct snd_soc_dai_ops siu_dai_ops = { 706 .startup = siu_dai_startup, 707 .shutdown = siu_dai_shutdown, 708 .prepare = siu_dai_prepare, 709 .set_sysclk = siu_dai_set_sysclk, 710 .set_fmt = siu_dai_set_fmt, 711 }; 712 713 static struct snd_soc_dai_driver siu_i2s_dai = { 714 .name = "siu-i2s-dai", 715 .playback = { 716 .channels_min = 2, 717 .channels_max = 2, 718 .formats = SNDRV_PCM_FMTBIT_S16, 719 .rates = SNDRV_PCM_RATE_8000_48000, 720 }, 721 .capture = { 722 .channels_min = 2, 723 .channels_max = 2, 724 .formats = SNDRV_PCM_FMTBIT_S16, 725 .rates = SNDRV_PCM_RATE_8000_48000, 726 }, 727 .ops = &siu_dai_ops, 728 }; 729 730 static const struct snd_soc_component_driver siu_i2s_component = { 731 .name = "siu-i2s", 732 }; 733 734 static int siu_probe(struct platform_device *pdev) 735 { 736 const struct firmware *fw_entry; 737 struct resource *res, *region; 738 struct siu_info *info; 739 int ret; 740 741 info = devm_kmalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 742 if (!info) 743 return -ENOMEM; 744 siu_i2s_data = info; 745 info->dev = &pdev->dev; 746 747 ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev); 748 if (ret) 749 return ret; 750 751 /* 752 * Loaded firmware is "const" - read only, but we have to modify it in 753 * snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect() 754 */ 755 memcpy(&info->fw, fw_entry->data, fw_entry->size); 756 757 release_firmware(fw_entry); 758 759 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 760 if (!res) 761 return -ENODEV; 762 763 region = devm_request_mem_region(&pdev->dev, res->start, 764 resource_size(res), pdev->name); 765 if (!region) { 766 dev_err(&pdev->dev, "SIU region already claimed\n"); 767 return -EBUSY; 768 } 769 770 info->pram = devm_ioremap(&pdev->dev, res->start, PRAM_SIZE); 771 if (!info->pram) 772 return -ENOMEM; 773 info->xram = devm_ioremap(&pdev->dev, res->start + XRAM_OFFSET, 774 XRAM_SIZE); 775 if (!info->xram) 776 return -ENOMEM; 777 info->yram = devm_ioremap(&pdev->dev, res->start + YRAM_OFFSET, 778 YRAM_SIZE); 779 if (!info->yram) 780 return -ENOMEM; 781 info->reg = devm_ioremap(&pdev->dev, res->start + REG_OFFSET, 782 resource_size(res) - REG_OFFSET); 783 if (!info->reg) 784 return -ENOMEM; 785 786 dev_set_drvdata(&pdev->dev, info); 787 788 /* register using ARRAY version so we can keep dai name */ 789 ret = devm_snd_soc_register_component(&pdev->dev, &siu_i2s_component, 790 &siu_i2s_dai, 1); 791 if (ret < 0) 792 return ret; 793 794 ret = devm_snd_soc_register_platform(&pdev->dev, &siu_platform); 795 if (ret < 0) 796 return ret; 797 798 pm_runtime_enable(&pdev->dev); 799 800 return 0; 801 } 802 803 static int siu_remove(struct platform_device *pdev) 804 { 805 pm_runtime_disable(&pdev->dev); 806 return 0; 807 } 808 809 static struct platform_driver siu_driver = { 810 .driver = { 811 .name = "siu-pcm-audio", 812 }, 813 .probe = siu_probe, 814 .remove = siu_remove, 815 }; 816 817 module_platform_driver(siu_driver); 818 819 MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>"); 820 MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver"); 821 MODULE_LICENSE("GPL"); 822