sound/soc/codecs/wm0010.c

   1 /*
   2  * wm0010.c  --  WM0010 DSP Driver
   3  *
   4  * Copyright 2012 Wolfson Microelectronics PLC.
   5  *
   6  * Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *          Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
   8  *          Scott Ling <sl@opensource.wolfsonmicro.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/irqreturn.h>
  19 #include <linux/init.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/firmware.h>
  22 #include <linux/delay.h>
  23 #include <linux/fs.h>
  24 #include <linux/gpio.h>
  25 #include <linux/regulator/consumer.h>
  26 #include <linux/mutex.h>
  27 #include <linux/workqueue.h>
  28
  29 #include <sound/soc.h>
  30 #include <sound/wm0010.h>
  31
  32 #define DEVICE_ID_WM0010        10
  33
  34 /* We only support v1 of the .dfw INFO record */
  35 #define INFO_VERSION            1
  36
  37 enum dfw_cmd {
  38         DFW_CMD_FUSE = 0x01,
  39         DFW_CMD_CODE_HDR,
  40         DFW_CMD_CODE_DATA,
  41         DFW_CMD_PLL,
  42         DFW_CMD_INFO = 0xff
  43 };
  44
  45 struct dfw_binrec {
  46         u8 command;
  47         u32 length:24;
  48         u32 address;
  49         uint8_t data[0];
  50 } __packed;
  51
  52 struct dfw_inforec {
  53         u8 info_version;
  54         u8 tool_major_version;
  55         u8 tool_minor_version;
  56         u8 dsp_target;
  57 };
  58
  59 struct dfw_pllrec {
  60         u8 command;
  61         u32 length:24;
  62         u32 address;
  63         u32 clkctrl1;
  64         u32 clkctrl2;
  65         u32 clkctrl3;
  66         u32 ldetctrl;
  67         u32 uart_div;
  68         u32 spi_div;
  69 } __packed;
  70
  71 static struct pll_clock_map {
  72         int max_sysclk;
  73         int max_pll_spi_speed;
  74         u32 pll_clkctrl1;
  75 } pll_clock_map[] = {                      /* Dividers */
  76         { 22000000, 26000000, 0x00201f11 }, /* 2,32,2  */
  77         { 18000000, 26000000, 0x00203f21 }, /* 2,64,4  */
  78         { 14000000, 26000000, 0x00202620 }, /* 1,39,4  */
  79         { 10000000, 22000000, 0x00203120 }, /* 1,50,4  */
  80         {  6500000, 22000000, 0x00204520 }, /* 1,70,4  */
  81         {  5500000, 22000000, 0x00103f10 }, /* 1,64,2  */
  82 };
  83
  84 enum wm0010_state {
  85         WM0010_POWER_OFF,
  86         WM0010_OUT_OF_RESET,
  87         WM0010_BOOTROM,
  88         WM0010_STAGE2,
  89         WM0010_FIRMWARE,
  90 };
  91
  92 struct wm0010_priv {
  93         struct snd_soc_codec *codec;
  94
  95         struct mutex lock;
  96         struct device *dev;
  97
  98         struct wm0010_pdata pdata;
  99
 100         int gpio_reset;
 101         int gpio_reset_value;
 102
 103         struct regulator_bulk_data core_supplies[2];
 104         struct regulator *dbvdd;
 105
 106         int sysclk;
 107
 108         enum wm0010_state state;
 109         bool boot_failed;
 110         bool ready;
 111         bool pll_running;
 112         int max_spi_freq;
 113         int board_max_spi_speed;
 114         u32 pll_clkctrl1;
 115
 116         spinlock_t irq_lock;
 117         int irq;
 118
 119         struct completion boot_completion;
 120 };
 121
 122 struct wm0010_spi_msg {
 123         struct spi_message m;
 124         struct spi_transfer t;
 125         u8 *tx_buf;
 126         u8 *rx_buf;
 127         size_t len;
 128 };
 129
 130 static const struct snd_soc_dapm_widget wm0010_dapm_widgets[] = {
 131 SND_SOC_DAPM_SUPPLY("CLKIN",  SND_SOC_NOPM, 0, 0, NULL, 0),
 132 };
 133
 134 static const struct snd_soc_dapm_route wm0010_dapm_routes[] = {
 135         { "SDI2 Capture", NULL, "SDI1 Playback" },
 136         { "SDI1 Capture", NULL, "SDI2 Playback" },
 137
 138         { "SDI1 Capture", NULL, "CLKIN" },
 139         { "SDI2 Capture", NULL, "CLKIN" },
 140         { "SDI1 Playback", NULL, "CLKIN" },
 141         { "SDI2 Playback", NULL, "CLKIN" },
 142 };
 143
 144 static const char *wm0010_state_to_str(enum wm0010_state state)
 145 {
 146         static const char * const state_to_str[] = {
 147                 "Power off",
 148                 "Out of reset",
 149                 "Boot ROM",
 150                 "Stage2",
 151                 "Firmware"
 152         };
 153
 154         if (state < 0 || state >= ARRAY_SIZE(state_to_str))
 155                 return "null";
 156         return state_to_str[state];
 157 }
 158
 159 /* Called with wm0010->lock held */
 160 static void wm0010_halt(struct snd_soc_codec *codec)
 161 {
 162         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 163         unsigned long flags;
 164         enum wm0010_state state;
 165
 166         /* Fetch the wm0010 state */
 167         spin_lock_irqsave(&wm0010->irq_lock, flags);
 168         state = wm0010->state;
 169         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 170
 171         switch (state) {
 172         case WM0010_POWER_OFF:
 173                 /* If there's nothing to do, bail out */
 174                 return;
 175         case WM0010_OUT_OF_RESET:
 176         case WM0010_BOOTROM:
 177         case WM0010_STAGE2:
 178         case WM0010_FIRMWARE:
 179                 /* Remember to put chip back into reset */
 180                 gpio_set_value_cansleep(wm0010->gpio_reset,
 181                                         wm0010->gpio_reset_value);
 182                 /* Disable the regulators */
 183                 regulator_disable(wm0010->dbvdd);
 184                 regulator_bulk_disable(ARRAY_SIZE(wm0010->core_supplies),
 185                                        wm0010->core_supplies);
 186                 break;
 187         }
 188
 189         spin_lock_irqsave(&wm0010->irq_lock, flags);
 190         wm0010->state = WM0010_POWER_OFF;
 191         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 192 }
 193
 194 struct wm0010_boot_xfer {
 195         struct list_head list;
 196         struct snd_soc_codec *codec;
 197         struct completion *done;
 198         struct spi_message m;
 199         struct spi_transfer t;
 200 };
 201
 202 /* Called with wm0010->lock held */
 203 static void wm0010_mark_boot_failure(struct wm0010_priv *wm0010)
 204 {
 205         enum wm0010_state state;
 206         unsigned long flags;
 207
 208         spin_lock_irqsave(&wm0010->irq_lock, flags);
 209         state = wm0010->state;
 210         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 211
 212         dev_err(wm0010->dev, "Failed to transition from `%s' state to `%s' state\n",
 213                 wm0010_state_to_str(state), wm0010_state_to_str(state + 1));
 214
 215         wm0010->boot_failed = true;
 216 }
 217
 218 static void wm0010_boot_xfer_complete(void *data)
 219 {
 220         struct wm0010_boot_xfer *xfer = data;
 221         struct snd_soc_codec *codec = xfer->codec;
 222         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 223         u32 *out32 = xfer->t.rx_buf;
 224         int i;
 225
 226         if (xfer->m.status != 0) {
 227                 dev_err(codec->dev, "SPI transfer failed: %d\n",
 228                         xfer->m.status);
 229                 wm0010_mark_boot_failure(wm0010);
 230                 if (xfer->done)
 231                         complete(xfer->done);
 232                 return;
 233         }
 234
 235         for (i = 0; i < xfer->t.len / 4; i++) {
 236                 dev_dbg(codec->dev, "%d: %04x\n", i, out32[i]);
 237
 238                 switch (be32_to_cpu(out32[i])) {
 239                 case 0xe0e0e0e0:
 240                         dev_err(codec->dev,
 241                                 "%d: ROM error reported in stage 2\n", i);
 242                         wm0010_mark_boot_failure(wm0010);
 243                         break;
 244
 245                 case 0x55555555:
 246                         if (wm0010->state < WM0010_STAGE2)
 247                                 break;
 248                         dev_err(codec->dev,
 249                                 "%d: ROM bootloader running in stage 2\n", i);
 250                         wm0010_mark_boot_failure(wm0010);
 251                         break;
 252
 253                 case 0x0fed0000:
 254                         dev_dbg(codec->dev, "Stage2 loader running\n");
 255                         break;
 256
 257                 case 0x0fed0007:
 258                         dev_dbg(codec->dev, "CODE_HDR packet received\n");
 259                         break;
 260
 261                 case 0x0fed0008:
 262                         dev_dbg(codec->dev, "CODE_DATA packet received\n");
 263                         break;
 264
 265                 case 0x0fed0009:
 266                         dev_dbg(codec->dev, "Download complete\n");
 267                         break;
 268
 269                 case 0x0fed000c:
 270                         dev_dbg(codec->dev, "Application start\n");
 271                         break;
 272
 273                 case 0x0fed000e:
 274                         dev_dbg(codec->dev, "PLL packet received\n");
 275                         wm0010->pll_running = true;
 276                         break;
 277
 278                 case 0x0fed0025:
 279                         dev_err(codec->dev, "Device reports image too long\n");
 280                         wm0010_mark_boot_failure(wm0010);
 281                         break;
 282
 283                 case 0x0fed002c:
 284                         dev_err(codec->dev, "Device reports bad SPI packet\n");
 285                         wm0010_mark_boot_failure(wm0010);
 286                         break;
 287
 288                 case 0x0fed0031:
 289                         dev_err(codec->dev, "Device reports SPI read overflow\n");
 290                         wm0010_mark_boot_failure(wm0010);
 291                         break;
 292
 293                 case 0x0fed0032:
 294                         dev_err(codec->dev, "Device reports SPI underclock\n");
 295                         wm0010_mark_boot_failure(wm0010);
 296                         break;
 297
 298                 case 0x0fed0033:
 299                         dev_err(codec->dev, "Device reports bad header packet\n");
 300                         wm0010_mark_boot_failure(wm0010);
 301                         break;
 302
 303                 case 0x0fed0034:
 304                         dev_err(codec->dev, "Device reports invalid packet type\n");
 305                         wm0010_mark_boot_failure(wm0010);
 306                         break;
 307
 308                 case 0x0fed0035:
 309                         dev_err(codec->dev, "Device reports data before header error\n");
 310                         wm0010_mark_boot_failure(wm0010);
 311                         break;
 312
 313                 case 0x0fed0038:
 314                         dev_err(codec->dev, "Device reports invalid PLL packet\n");
 315                         break;
 316
 317                 case 0x0fed003a:
 318                         dev_err(codec->dev, "Device reports packet alignment error\n");
 319                         wm0010_mark_boot_failure(wm0010);
 320                         break;
 321
 322                 default:
 323                         dev_err(codec->dev, "Unrecognised return 0x%x\n",
 324                             be32_to_cpu(out32[i]));
 325                         wm0010_mark_boot_failure(wm0010);
 326                         break;
 327                 }
 328
 329                 if (wm0010->boot_failed)
 330                         break;
 331         }
 332
 333         if (xfer->done)
 334                 complete(xfer->done);
 335 }
 336
 337 static void byte_swap_64(u64 *data_in, u64 *data_out, u32 len)
 338 {
 339         int i;
 340
 341         for (i = 0; i < len / 8; i++)
 342                 data_out[i] = cpu_to_be64(le64_to_cpu(data_in[i]));
 343 }
 344
 345 static int wm0010_firmware_load(const char *name, struct snd_soc_codec *codec)
 346 {
 347         struct spi_device *spi = to_spi_device(codec->dev);
 348         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 349         struct list_head xfer_list;
 350         struct wm0010_boot_xfer *xfer;
 351         int ret;
 352         struct completion done;
 353         const struct firmware *fw;
 354         const struct dfw_binrec *rec;
 355         const struct dfw_inforec *inforec;
 356         u64 *img;
 357         u8 *out, dsp;
 358         u32 len, offset;
 359
 360         INIT_LIST_HEAD(&xfer_list);
 361
 362         ret = request_firmware(&fw, name, codec->dev);
 363         if (ret != 0) {
 364                 dev_err(codec->dev, "Failed to request application(%s): %d\n",
 365                         name, ret);
 366                 return ret;
 367         }
 368
 369         rec = (const struct dfw_binrec *)fw->data;
 370         inforec = (const struct dfw_inforec *)rec->data;
 371         offset = 0;
 372         dsp = inforec->dsp_target;
 373         wm0010->boot_failed = false;
 374         if (WARN_ON(!list_empty(&xfer_list)))
 375                 return -EINVAL;
 376         init_completion(&done);
 377
 378         /* First record should be INFO */
 379         if (rec->command != DFW_CMD_INFO) {
 380                 dev_err(codec->dev, "First record not INFO\r\n");
 381                 ret = -EINVAL;
 382                 goto abort;
 383         }
 384
 385         if (inforec->info_version != INFO_VERSION) {
 386                 dev_err(codec->dev,
 387                         "Unsupported version (%02d) of INFO record\r\n",
 388                         inforec->info_version);
 389                 ret = -EINVAL;
 390                 goto abort;
 391         }
 392
 393         dev_dbg(codec->dev, "Version v%02d INFO record found\r\n",
 394                 inforec->info_version);
 395
 396         /* Check it's a DSP file */
 397         if (dsp != DEVICE_ID_WM0010) {
 398                 dev_err(codec->dev, "Not a WM0010 firmware file.\r\n");
 399                 ret = -EINVAL;
 400                 goto abort;
 401         }
 402
 403         /* Skip the info record as we don't need to send it */
 404         offset += ((rec->length) + 8);
 405         rec = (void *)&rec->data[rec->length];
 406
 407         while (offset < fw->size) {
 408                 dev_dbg(codec->dev,
 409                         "Packet: command %d, data length = 0x%x\r\n",
 410                         rec->command, rec->length);
 411                 len = rec->length + 8;
 412
 413                 xfer = kzalloc(sizeof(*xfer), GFP_KERNEL);
 414                 if (!xfer) {
 415                         ret = -ENOMEM;
 416                         goto abort;
 417                 }
 418
 419                 xfer->codec = codec;
 420                 list_add_tail(&xfer->list, &xfer_list);
 421
 422                 out = kzalloc(len, GFP_KERNEL | GFP_DMA);
 423                 if (!out) {
 424                         ret = -ENOMEM;
 425                         goto abort1;
 426                 }
 427                 xfer->t.rx_buf = out;
 428
 429                 img = kzalloc(len, GFP_KERNEL | GFP_DMA);
 430                 if (!img) {
 431                         ret = -ENOMEM;
 432                         goto abort1;
 433                 }
 434                 xfer->t.tx_buf = img;
 435
 436                 byte_swap_64((u64 *)&rec->command, img, len);
 437
 438                 spi_message_init(&xfer->m);
 439                 xfer->m.complete = wm0010_boot_xfer_complete;
 440                 xfer->m.context = xfer;
 441                 xfer->t.len = len;
 442                 xfer->t.bits_per_word = 8;
 443
 444                 if (!wm0010->pll_running) {
 445                         xfer->t.speed_hz = wm0010->sysclk / 6;
 446                 } else {
 447                         xfer->t.speed_hz = wm0010->max_spi_freq;
 448
 449                         if (wm0010->board_max_spi_speed &&
 450                            (wm0010->board_max_spi_speed < wm0010->max_spi_freq))
 451                                         xfer->t.speed_hz = wm0010->board_max_spi_speed;
 452                 }
 453
 454                 /* Store max usable spi frequency for later use */
 455                 wm0010->max_spi_freq = xfer->t.speed_hz;
 456
 457                 spi_message_add_tail(&xfer->t, &xfer->m);
 458
 459                 offset += ((rec->length) + 8);
 460                 rec = (void *)&rec->data[rec->length];
 461
 462                 if (offset >= fw->size) {
 463                         dev_dbg(codec->dev, "All transfers scheduled\n");
 464                         xfer->done = &done;
 465                 }
 466
 467                 ret = spi_async(spi, &xfer->m);
 468                 if (ret != 0) {
 469                         dev_err(codec->dev, "Write failed: %d\n", ret);
 470                         goto abort1;
 471                 }
 472
 473                 if (wm0010->boot_failed) {
 474                         dev_dbg(codec->dev, "Boot fail!\n");
 475                         ret = -EINVAL;
 476                         goto abort1;
 477                 }
 478         }
 479
 480         wait_for_completion(&done);
 481
 482         ret = 0;
 483
 484 abort1:
 485         while (!list_empty(&xfer_list)) {
 486                 xfer = list_first_entry(&xfer_list, struct wm0010_boot_xfer,
 487                                         list);
 488                 kfree(xfer->t.rx_buf);
 489                 kfree(xfer->t.tx_buf);
 490                 list_del(&xfer->list);
 491                 kfree(xfer);
 492         }
 493
 494 abort:
 495         release_firmware(fw);
 496         return ret;
 497 }
 498
 499 static int wm0010_stage2_load(struct snd_soc_codec *codec)
 500 {
 501         struct spi_device *spi = to_spi_device(codec->dev);
 502         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 503         const struct firmware *fw;
 504         struct spi_message m;
 505         struct spi_transfer t;
 506         u32 *img;
 507         u8 *out;
 508         int i;
 509         int ret = 0;
 510
 511         ret = request_firmware(&fw, "wm0010_stage2.bin", codec->dev);
 512         if (ret != 0) {
 513                 dev_err(codec->dev, "Failed to request stage2 loader: %d\n",
 514                         ret);
 515                 return ret;
 516         }
 517
 518         dev_dbg(codec->dev, "Downloading %zu byte stage 2 loader\n", fw->size);
 519
 520         /* Copy to local buffer first as vmalloc causes problems for dma */
 521         img = kzalloc(fw->size, GFP_KERNEL | GFP_DMA);
 522         if (!img) {
 523                 ret = -ENOMEM;
 524                 goto abort2;
 525         }
 526
 527         out = kzalloc(fw->size, GFP_KERNEL | GFP_DMA);
 528         if (!out) {
 529                 ret = -ENOMEM;
 530                 goto abort1;
 531         }
 532
 533         memcpy(img, &fw->data[0], fw->size);
 534
 535         spi_message_init(&m);
 536         memset(&t, 0, sizeof(t));
 537         t.rx_buf = out;
 538         t.tx_buf = img;
 539         t.len = fw->size;
 540         t.bits_per_word = 8;
 541         t.speed_hz = wm0010->sysclk / 10;
 542         spi_message_add_tail(&t, &m);
 543
 544         dev_dbg(codec->dev, "Starting initial download at %dHz\n",
 545                 t.speed_hz);
 546
 547         ret = spi_sync(spi, &m);
 548         if (ret != 0) {
 549                 dev_err(codec->dev, "Initial download failed: %d\n", ret);
 550                 goto abort;
 551         }
 552
 553         /* Look for errors from the boot ROM */
 554         for (i = 0; i < fw->size; i++) {
 555                 if (out[i] != 0x55) {
 556                         dev_err(codec->dev, "Boot ROM error: %x in %d\n",
 557                                 out[i], i);
 558                         wm0010_mark_boot_failure(wm0010);
 559                         ret = -EBUSY;
 560                         goto abort;
 561                 }
 562         }
 563 abort:
 564         kfree(out);
 565 abort1:
 566         kfree(img);
 567 abort2:
 568         release_firmware(fw);
 569
 570         return ret;
 571 }
 572
 573 static int wm0010_boot(struct snd_soc_codec *codec)
 574 {
 575         struct spi_device *spi = to_spi_device(codec->dev);
 576         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 577         unsigned long flags;
 578         int ret;
 579         struct spi_message m;
 580         struct spi_transfer t;
 581         struct dfw_pllrec pll_rec;
 582         u32 *p, len;
 583         u64 *img_swap;
 584         u8 *out;
 585         int i;
 586
 587         spin_lock_irqsave(&wm0010->irq_lock, flags);
 588         if (wm0010->state != WM0010_POWER_OFF)
 589                 dev_warn(wm0010->dev, "DSP already powered up!\n");
 590         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 591
 592         if (wm0010->sysclk > 26000000) {
 593                 dev_err(codec->dev, "Max DSP clock frequency is 26MHz\n");
 594                 ret = -ECANCELED;
 595                 goto err;
 596         }
 597
 598         mutex_lock(&wm0010->lock);
 599         wm0010->pll_running = false;
 600
 601         dev_dbg(codec->dev, "max_spi_freq: %d\n", wm0010->max_spi_freq);
 602
 603         ret = regulator_bulk_enable(ARRAY_SIZE(wm0010->core_supplies),
 604                                     wm0010->core_supplies);
 605         if (ret != 0) {
 606                 dev_err(&spi->dev, "Failed to enable core supplies: %d\n",
 607                         ret);
 608                 mutex_unlock(&wm0010->lock);
 609                 goto err;
 610         }
 611
 612         ret = regulator_enable(wm0010->dbvdd);
 613         if (ret != 0) {
 614                 dev_err(&spi->dev, "Failed to enable DBVDD: %d\n", ret);
 615                 goto err_core;
 616         }
 617
 618         /* Release reset */
 619         gpio_set_value_cansleep(wm0010->gpio_reset, !wm0010->gpio_reset_value);
 620         spin_lock_irqsave(&wm0010->irq_lock, flags);
 621         wm0010->state = WM0010_OUT_OF_RESET;
 622         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 623
 624         if (!wait_for_completion_timeout(&wm0010->boot_completion,
 625                                          msecs_to_jiffies(20)))
 626                 dev_err(codec->dev, "Failed to get interrupt from DSP\n");
 627
 628         spin_lock_irqsave(&wm0010->irq_lock, flags);
 629         wm0010->state = WM0010_BOOTROM;
 630         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 631
 632         ret = wm0010_stage2_load(codec);
 633         if (ret)
 634                 goto abort;
 635
 636         if (!wait_for_completion_timeout(&wm0010->boot_completion,
 637                                          msecs_to_jiffies(20)))
 638                 dev_err(codec->dev, "Failed to get interrupt from DSP loader.\n");
 639
 640         spin_lock_irqsave(&wm0010->irq_lock, flags);
 641         wm0010->state = WM0010_STAGE2;
 642         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 643
 644         /* Only initialise PLL if max_spi_freq initialised */
 645         if (wm0010->max_spi_freq) {
 646
 647                 /* Initialise a PLL record */
 648                 memset(&pll_rec, 0, sizeof(pll_rec));
 649                 pll_rec.command = DFW_CMD_PLL;
 650                 pll_rec.length = (sizeof(pll_rec) - 8);
 651
 652                 /* On wm0010 only the CLKCTRL1 value is used */
 653                 pll_rec.clkctrl1 = wm0010->pll_clkctrl1;
 654
 655                 ret = -ENOMEM;
 656                 len = pll_rec.length + 8;
 657                 out = kzalloc(len, GFP_KERNEL | GFP_DMA);
 658                 if (!out)
 659                         goto abort;
 660
 661                 img_swap = kzalloc(len, GFP_KERNEL | GFP_DMA);
 662                 if (!img_swap)
 663                         goto abort_out;
 664
 665                 /* We need to re-order for 0010 */
 666                 byte_swap_64((u64 *)&pll_rec, img_swap, len);
 667
 668                 spi_message_init(&m);
 669                 memset(&t, 0, sizeof(t));
 670                 t.rx_buf = out;
 671                 t.tx_buf = img_swap;
 672                 t.len = len;
 673                 t.bits_per_word = 8;
 674                 t.speed_hz = wm0010->sysclk / 6;
 675                 spi_message_add_tail(&t, &m);
 676
 677                 ret = spi_sync(spi, &m);
 678                 if (ret) {
 679                         dev_err(codec->dev, "First PLL write failed: %d\n", ret);
 680                         goto abort_swap;
 681                 }
 682
 683                 /* Use a second send of the message to get the return status */
 684                 ret = spi_sync(spi, &m);
 685                 if (ret) {
 686                         dev_err(codec->dev, "Second PLL write failed: %d\n", ret);
 687                         goto abort_swap;
 688                 }
 689
 690                 p = (u32 *)out;
 691
 692                 /* Look for PLL active code from the DSP */
 693                 for (i = 0; i < len / 4; i++) {
 694                         if (*p == 0x0e00ed0f) {
 695                                 dev_dbg(codec->dev, "PLL packet received\n");
 696                                 wm0010->pll_running = true;
 697                                 break;
 698                         }
 699                         p++;
 700                 }
 701
 702                 kfree(img_swap);
 703                 kfree(out);
 704         } else
 705                 dev_dbg(codec->dev, "Not enabling DSP PLL.");
 706
 707         ret = wm0010_firmware_load("wm0010.dfw", codec);
 708
 709         if (ret != 0)
 710                 goto abort;
 711
 712         spin_lock_irqsave(&wm0010->irq_lock, flags);
 713         wm0010->state = WM0010_FIRMWARE;
 714         spin_unlock_irqrestore(&wm0010->irq_lock, flags);
 715
 716         mutex_unlock(&wm0010->lock);
 717
 718         return 0;
 719
 720 abort_swap:
 721         kfree(img_swap);
 722 abort_out:
 723         kfree(out);
 724 abort:
 725         /* Put the chip back into reset */
 726         wm0010_halt(codec);
 727         mutex_unlock(&wm0010->lock);
 728         return ret;
 729
 730 err_core:
 731         mutex_unlock(&wm0010->lock);
 732         regulator_bulk_disable(ARRAY_SIZE(wm0010->core_supplies),
 733                                wm0010->core_supplies);
 734 err:
 735         return ret;
 736 }
 737
 738 static int wm0010_set_bias_level(struct snd_soc_codec *codec,
 739                                  enum snd_soc_bias_level level)
 740 {
 741         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 742
 743         switch (level) {
 744         case SND_SOC_BIAS_ON:
 745                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_PREPARE)
 746                         wm0010_boot(codec);
 747                 break;
 748         case SND_SOC_BIAS_PREPARE:
 749                 break;
 750         case SND_SOC_BIAS_STANDBY:
 751                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_PREPARE) {
 752                         mutex_lock(&wm0010->lock);
 753                         wm0010_halt(codec);
 754                         mutex_unlock(&wm0010->lock);
 755                 }
 756                 break;
 757         case SND_SOC_BIAS_OFF:
 758                 break;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int wm0010_set_sysclk(struct snd_soc_codec *codec, int source,
 765                              int clk_id, unsigned int freq, int dir)
 766 {
 767         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 768         unsigned int i;
 769
 770         wm0010->sysclk = freq;
 771
 772         if (freq < pll_clock_map[ARRAY_SIZE(pll_clock_map)-1].max_sysclk) {
 773                 wm0010->max_spi_freq = 0;
 774         } else {
 775                 for (i = 0; i < ARRAY_SIZE(pll_clock_map); i++)
 776                         if (freq >= pll_clock_map[i].max_sysclk) {
 777                                 wm0010->max_spi_freq = pll_clock_map[i].max_pll_spi_speed;
 778                                 wm0010->pll_clkctrl1 = pll_clock_map[i].pll_clkctrl1;
 779                                 break;
 780                         }
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int wm0010_probe(struct snd_soc_codec *codec);
 787
 788 static const struct snd_soc_codec_driver soc_codec_dev_wm0010 = {
 789         .probe = wm0010_probe,
 790         .set_bias_level = wm0010_set_bias_level,
 791         .set_sysclk = wm0010_set_sysclk,
 792         .idle_bias_off = true,
 793
 794         .component_driver = {
 795                 .dapm_widgets           = wm0010_dapm_widgets,
 796                 .num_dapm_widgets       = ARRAY_SIZE(wm0010_dapm_widgets),
 797                 .dapm_routes            = wm0010_dapm_routes,
 798                 .num_dapm_routes        = ARRAY_SIZE(wm0010_dapm_routes),
 799         },
 800 };
 801
 802 #define WM0010_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 803 #define WM0010_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
 804                         SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |\
 805                         SNDRV_PCM_FMTBIT_S32_LE)
 806
 807 static struct snd_soc_dai_driver wm0010_dai[] = {
 808         {
 809                 .name = "wm0010-sdi1",
 810                 .playback = {
 811                         .stream_name = "SDI1 Playback",
 812                         .channels_min = 1,
 813                         .channels_max = 2,
 814                         .rates = WM0010_RATES,
 815                         .formats = WM0010_FORMATS,
 816                 },
 817                 .capture = {
 818                          .stream_name = "SDI1 Capture",
 819                          .channels_min = 1,
 820                          .channels_max = 2,
 821                          .rates = WM0010_RATES,
 822                          .formats = WM0010_FORMATS,
 823                  },
 824         },
 825         {
 826                 .name = "wm0010-sdi2",
 827                 .playback = {
 828                         .stream_name = "SDI2 Playback",
 829                         .channels_min = 1,
 830                         .channels_max = 2,
 831                         .rates = WM0010_RATES,
 832                         .formats = WM0010_FORMATS,
 833                 },
 834                 .capture = {
 835                          .stream_name = "SDI2 Capture",
 836                          .channels_min = 1,
 837                          .channels_max = 2,
 838                          .rates = WM0010_RATES,
 839                          .formats = WM0010_FORMATS,
 840                  },
 841         },
 842 };
 843
 844 static irqreturn_t wm0010_irq(int irq, void *data)
 845 {
 846         struct wm0010_priv *wm0010 = data;
 847
 848         switch (wm0010->state) {
 849         case WM0010_OUT_OF_RESET:
 850         case WM0010_BOOTROM:
 851         case WM0010_STAGE2:
 852                 spin_lock(&wm0010->irq_lock);
 853                 complete(&wm0010->boot_completion);
 854                 spin_unlock(&wm0010->irq_lock);
 855                 return IRQ_HANDLED;
 856         default:
 857                 return IRQ_NONE;
 858         }
 859
 860         return IRQ_NONE;
 861 }
 862
 863 static int wm0010_probe(struct snd_soc_codec *codec)
 864 {
 865         struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec);
 866
 867         wm0010->codec = codec;
 868
 869         return 0;
 870 }
 871
 872 static int wm0010_spi_probe(struct spi_device *spi)
 873 {
 874         unsigned long gpio_flags;
 875         int ret;
 876         int trigger;
 877         int irq;
 878         struct wm0010_priv *wm0010;
 879
 880         wm0010 = devm_kzalloc(&spi->dev, sizeof(*wm0010),
 881                               GFP_KERNEL);
 882         if (!wm0010)
 883                 return -ENOMEM;
 884
 885         mutex_init(&wm0010->lock);
 886         spin_lock_init(&wm0010->irq_lock);
 887
 888         spi_set_drvdata(spi, wm0010);
 889         wm0010->dev = &spi->dev;
 890
 891         if (dev_get_platdata(&spi->dev))
 892                 memcpy(&wm0010->pdata, dev_get_platdata(&spi->dev),
 893                        sizeof(wm0010->pdata));
 894
 895         init_completion(&wm0010->boot_completion);
 896
 897         wm0010->core_supplies[0].supply = "AVDD";
 898         wm0010->core_supplies[1].supply = "DCVDD";
 899         ret = devm_regulator_bulk_get(wm0010->dev, ARRAY_SIZE(wm0010->core_supplies),
 900                                       wm0010->core_supplies);
 901         if (ret != 0) {
 902                 dev_err(wm0010->dev, "Failed to obtain core supplies: %d\n",
 903                         ret);
 904                 return ret;
 905         }
 906
 907         wm0010->dbvdd = devm_regulator_get(wm0010->dev, "DBVDD");
 908         if (IS_ERR(wm0010->dbvdd)) {
 909                 ret = PTR_ERR(wm0010->dbvdd);
 910                 dev_err(wm0010->dev, "Failed to obtain DBVDD: %d\n", ret);
 911                 return ret;
 912         }
 913
 914         if (wm0010->pdata.gpio_reset) {
 915                 wm0010->gpio_reset = wm0010->pdata.gpio_reset;
 916
 917                 if (wm0010->pdata.reset_active_high)
 918                         wm0010->gpio_reset_value = 1;
 919                 else
 920                         wm0010->gpio_reset_value = 0;
 921
 922                 if (wm0010->gpio_reset_value)
 923                         gpio_flags = GPIOF_OUT_INIT_HIGH;
 924                 else
 925                         gpio_flags = GPIOF_OUT_INIT_LOW;
 926
 927                 ret = devm_gpio_request_one(wm0010->dev, wm0010->gpio_reset,
 928                                             gpio_flags, "wm0010 reset");
 929                 if (ret < 0) {
 930                         dev_err(wm0010->dev,
 931                                 "Failed to request GPIO for DSP reset: %d\n",
 932                                 ret);
 933                         return ret;
 934                 }
 935         } else {
 936                 dev_err(wm0010->dev, "No reset GPIO configured\n");
 937                 return -EINVAL;
 938         }
 939
 940         wm0010->state = WM0010_POWER_OFF;
 941
 942         irq = spi->irq;
 943         if (wm0010->pdata.irq_flags)
 944                 trigger = wm0010->pdata.irq_flags;
 945         else
 946                 trigger = IRQF_TRIGGER_FALLING;
 947         trigger |= IRQF_ONESHOT;
 948
 949         ret = request_threaded_irq(irq, NULL, wm0010_irq, trigger,
 950                                    "wm0010", wm0010);
 951         if (ret) {
 952                 dev_err(wm0010->dev, "Failed to request IRQ %d: %d\n",
 953                         irq, ret);
 954                 return ret;
 955         }
 956         wm0010->irq = irq;
 957
 958         ret = irq_set_irq_wake(irq, 1);
 959         if (ret) {
 960                 dev_err(wm0010->dev, "Failed to set IRQ %d as wake source: %d\n",
 961                         irq, ret);
 962                 return ret;
 963         }
 964
 965         if (spi->max_speed_hz)
 966                 wm0010->board_max_spi_speed = spi->max_speed_hz;
 967         else
 968                 wm0010->board_max_spi_speed = 0;
 969
 970         ret = snd_soc_register_codec(&spi->dev,
 971                                      &soc_codec_dev_wm0010, wm0010_dai,
 972                                      ARRAY_SIZE(wm0010_dai));
 973         if (ret < 0)
 974                 return ret;
 975
 976         return 0;
 977 }
 978
 979 static int wm0010_spi_remove(struct spi_device *spi)
 980 {
 981         struct wm0010_priv *wm0010 = spi_get_drvdata(spi);
 982
 983         snd_soc_unregister_codec(&spi->dev);
 984
 985         gpio_set_value_cansleep(wm0010->gpio_reset,
 986                                 wm0010->gpio_reset_value);
 987
 988         irq_set_irq_wake(wm0010->irq, 0);
 989
 990         if (wm0010->irq)
 991                 free_irq(wm0010->irq, wm0010);
 992
 993         return 0;
 994 }
 995
 996 static struct spi_driver wm0010_spi_driver = {
 997         .driver = {
 998                 .name   = "wm0010",
 999         },
1000         .probe          = wm0010_spi_probe,
1001         .remove         = wm0010_spi_remove,
1002 };
1003
1004 module_spi_driver(wm0010_spi_driver);
1005
1006 MODULE_DESCRIPTION("ASoC WM0010 driver");
1007 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1008 MODULE_LICENSE("GPL");