drivers/net/wireless/wl12xx/boot.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2010 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * 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., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/wl12xx.h>
  26
  27 #include "debug.h"
  28 #include "acx.h"
  29 #include "reg.h"
  30 #include "boot.h"
  31 #include "io.h"
  32 #include "event.h"
  33 #include "rx.h"
  34
  35 static struct wl1271_partition_set part_table[PART_TABLE_LEN] = {
  36         [PART_DOWN] = {
  37                 .mem = {
  38                         .start = 0x00000000,
  39                         .size  = 0x000177c0
  40                 },
  41                 .reg = {
  42                         .start = REGISTERS_BASE,
  43                         .size  = 0x00008800
  44                 },
  45                 .mem2 = {
  46                         .start = 0x00000000,
  47                         .size  = 0x00000000
  48                 },
  49                 .mem3 = {
  50                         .start = 0x00000000,
  51                         .size  = 0x00000000
  52                 },
  53         },
  54
  55         [PART_WORK] = {
  56                 .mem = {
  57                         .start = 0x00040000,
  58                         .size  = 0x00014fc0
  59                 },
  60                 .reg = {
  61                         .start = REGISTERS_BASE,
  62                         .size  = 0x0000a000
  63                 },
  64                 .mem2 = {
  65                         .start = 0x003004f8,
  66                         .size  = 0x00000004
  67                 },
  68                 .mem3 = {
  69                         .start = 0x00040404,
  70                         .size  = 0x00000000
  71                 },
  72         },
  73
  74         [PART_DRPW] = {
  75                 .mem = {
  76                         .start = 0x00040000,
  77                         .size  = 0x00014fc0
  78                 },
  79                 .reg = {
  80                         .start = DRPW_BASE,
  81                         .size  = 0x00006000
  82                 },
  83                 .mem2 = {
  84                         .start = 0x00000000,
  85                         .size  = 0x00000000
  86                 },
  87                 .mem3 = {
  88                         .start = 0x00000000,
  89                         .size  = 0x00000000
  90                 }
  91         }
  92 };
  93
  94 static void wl1271_boot_set_ecpu_ctrl(struct wl1271 *wl, u32 flag)
  95 {
  96         u32 cpu_ctrl;
  97
  98         /* 10.5.0 run the firmware (I) */
  99         cpu_ctrl = wl1271_read32(wl, ACX_REG_ECPU_CONTROL);
 100
 101         /* 10.5.1 run the firmware (II) */
 102         cpu_ctrl |= flag;
 103         wl1271_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
 104 }
 105
 106 static unsigned int wl12xx_get_fw_ver_quirks(struct wl1271 *wl)
 107 {
 108         unsigned int quirks = 0;
 109         unsigned int *fw_ver = wl->chip.fw_ver;
 110
 111         /* Only new station firmwares support routing fw logs to the host */
 112         if ((fw_ver[FW_VER_IF_TYPE] == FW_VER_IF_TYPE_STA) &&
 113             (fw_ver[FW_VER_MINOR] < FW_VER_MINOR_FWLOG_STA_MIN))
 114                 quirks |= WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED;
 115
 116         /* This feature is not yet supported for AP mode */
 117         if (fw_ver[FW_VER_IF_TYPE] == FW_VER_IF_TYPE_AP)
 118                 quirks |= WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED;
 119
 120         return quirks;
 121 }
 122
 123 static void wl1271_parse_fw_ver(struct wl1271 *wl)
 124 {
 125         int ret;
 126
 127         ret = sscanf(wl->chip.fw_ver_str + 4, "%u.%u.%u.%u.%u",
 128                      &wl->chip.fw_ver[0], &wl->chip.fw_ver[1],
 129                      &wl->chip.fw_ver[2], &wl->chip.fw_ver[3],
 130                      &wl->chip.fw_ver[4]);
 131
 132         if (ret != 5) {
 133                 wl1271_warning("fw version incorrect value");
 134                 memset(wl->chip.fw_ver, 0, sizeof(wl->chip.fw_ver));
 135                 return;
 136         }
 137
 138         /* Check if any quirks are needed with older fw versions */
 139         wl->quirks |= wl12xx_get_fw_ver_quirks(wl);
 140 }
 141
 142 static void wl1271_boot_fw_version(struct wl1271 *wl)
 143 {
 144         struct wl1271_static_data static_data;
 145
 146         wl1271_read(wl, wl->cmd_box_addr, &static_data, sizeof(static_data),
 147                     false);
 148
 149         strncpy(wl->chip.fw_ver_str, static_data.fw_version,
 150                 sizeof(wl->chip.fw_ver_str));
 151
 152         /* make sure the string is NULL-terminated */
 153         wl->chip.fw_ver_str[sizeof(wl->chip.fw_ver_str) - 1] = '\0';
 154
 155         wl1271_parse_fw_ver(wl);
 156 }
 157
 158 static int wl1271_boot_upload_firmware_chunk(struct wl1271 *wl, void *buf,
 159                                              size_t fw_data_len, u32 dest)
 160 {
 161         struct wl1271_partition_set partition;
 162         int addr, chunk_num, partition_limit;
 163         u8 *p, *chunk;
 164
 165         /* whal_FwCtrl_LoadFwImageSm() */
 166
 167         wl1271_debug(DEBUG_BOOT, "starting firmware upload");
 168
 169         wl1271_debug(DEBUG_BOOT, "fw_data_len %zd chunk_size %d",
 170                      fw_data_len, CHUNK_SIZE);
 171
 172         if ((fw_data_len % 4) != 0) {
 173                 wl1271_error("firmware length not multiple of four");
 174                 return -EIO;
 175         }
 176
 177         chunk = kmalloc(CHUNK_SIZE, GFP_KERNEL);
 178         if (!chunk) {
 179                 wl1271_error("allocation for firmware upload chunk failed");
 180                 return -ENOMEM;
 181         }
 182
 183         memcpy(&partition, &part_table[PART_DOWN], sizeof(partition));
 184         partition.mem.start = dest;
 185         wl1271_set_partition(wl, &partition);
 186
 187         /* 10.1 set partition limit and chunk num */
 188         chunk_num = 0;
 189         partition_limit = part_table[PART_DOWN].mem.size;
 190
 191         while (chunk_num < fw_data_len / CHUNK_SIZE) {
 192                 /* 10.2 update partition, if needed */
 193                 addr = dest + (chunk_num + 2) * CHUNK_SIZE;
 194                 if (addr > partition_limit) {
 195                         addr = dest + chunk_num * CHUNK_SIZE;
 196                         partition_limit = chunk_num * CHUNK_SIZE +
 197                                 part_table[PART_DOWN].mem.size;
 198                         partition.mem.start = addr;
 199                         wl1271_set_partition(wl, &partition);
 200                 }
 201
 202                 /* 10.3 upload the chunk */
 203                 addr = dest + chunk_num * CHUNK_SIZE;
 204                 p = buf + chunk_num * CHUNK_SIZE;
 205                 memcpy(chunk, p, CHUNK_SIZE);
 206                 wl1271_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x",
 207                              p, addr);
 208                 wl1271_write(wl, addr, chunk, CHUNK_SIZE, false);
 209
 210                 chunk_num++;
 211         }
 212
 213         /* 10.4 upload the last chunk */
 214         addr = dest + chunk_num * CHUNK_SIZE;
 215         p = buf + chunk_num * CHUNK_SIZE;
 216         memcpy(chunk, p, fw_data_len % CHUNK_SIZE);
 217         wl1271_debug(DEBUG_BOOT, "uploading fw last chunk (%zd B) 0x%p to 0x%x",
 218                      fw_data_len % CHUNK_SIZE, p, addr);
 219         wl1271_write(wl, addr, chunk, fw_data_len % CHUNK_SIZE, false);
 220
 221         kfree(chunk);
 222         return 0;
 223 }
 224
 225 static int wl1271_boot_upload_firmware(struct wl1271 *wl)
 226 {
 227         u32 chunks, addr, len;
 228         int ret = 0;
 229         u8 *fw;
 230
 231         fw = wl->fw;
 232         chunks = be32_to_cpup((__be32 *) fw);
 233         fw += sizeof(u32);
 234
 235         wl1271_debug(DEBUG_BOOT, "firmware chunks to be uploaded: %u", chunks);
 236
 237         while (chunks--) {
 238                 addr = be32_to_cpup((__be32 *) fw);
 239                 fw += sizeof(u32);
 240                 len = be32_to_cpup((__be32 *) fw);
 241                 fw += sizeof(u32);
 242
 243                 if (len > 300000) {
 244                         wl1271_info("firmware chunk too long: %u", len);
 245                         return -EINVAL;
 246                 }
 247                 wl1271_debug(DEBUG_BOOT, "chunk %d addr 0x%x len %u",
 248                              chunks, addr, len);
 249                 ret = wl1271_boot_upload_firmware_chunk(wl, fw, len, addr);
 250                 if (ret != 0)
 251                         break;
 252                 fw += len;
 253         }
 254
 255         return ret;
 256 }
 257
 258 static int wl1271_boot_upload_nvs(struct wl1271 *wl)
 259 {
 260         size_t nvs_len, burst_len;
 261         int i;
 262         u32 dest_addr, val;
 263         u8 *nvs_ptr, *nvs_aligned;
 264
 265         if (wl->nvs == NULL)
 266                 return -ENODEV;
 267
 268         if (wl->chip.id == CHIP_ID_1283_PG20) {
 269                 struct wl128x_nvs_file *nvs = (struct wl128x_nvs_file *)wl->nvs;
 270
 271                 if (wl->nvs_len == sizeof(struct wl128x_nvs_file)) {
 272                         if (nvs->general_params.dual_mode_select)
 273                                 wl->enable_11a = true;
 274                 } else {
 275                         wl1271_error("nvs size is not as expected: %zu != %zu",
 276                                      wl->nvs_len,
 277                                      sizeof(struct wl128x_nvs_file));
 278                         kfree(wl->nvs);
 279                         wl->nvs = NULL;
 280                         wl->nvs_len = 0;
 281                         return -EILSEQ;
 282                 }
 283
 284                 /* only the first part of the NVS needs to be uploaded */
 285                 nvs_len = sizeof(nvs->nvs);
 286                 nvs_ptr = (u8 *)nvs->nvs;
 287
 288         } else {
 289                 struct wl1271_nvs_file *nvs =
 290                         (struct wl1271_nvs_file *)wl->nvs;
 291                 /*
 292                  * FIXME: the LEGACY NVS image support (NVS's missing the 5GHz
 293                  * band configurations) can be removed when those NVS files stop
 294                  * floating around.
 295                  */
 296                 if (wl->nvs_len == sizeof(struct wl1271_nvs_file) ||
 297                     wl->nvs_len == WL1271_INI_LEGACY_NVS_FILE_SIZE) {
 298                         if (nvs->general_params.dual_mode_select)
 299                                 wl->enable_11a = true;
 300                 }
 301
 302                 if (wl->nvs_len != sizeof(struct wl1271_nvs_file) &&
 303                     (wl->nvs_len != WL1271_INI_LEGACY_NVS_FILE_SIZE ||
 304                      wl->enable_11a)) {
 305                         wl1271_error("nvs size is not as expected: %zu != %zu",
 306                                 wl->nvs_len, sizeof(struct wl1271_nvs_file));
 307                         kfree(wl->nvs);
 308                         wl->nvs = NULL;
 309                         wl->nvs_len = 0;
 310                         return -EILSEQ;
 311                 }
 312
 313                 /* only the first part of the NVS needs to be uploaded */
 314                 nvs_len = sizeof(nvs->nvs);
 315                 nvs_ptr = (u8 *) nvs->nvs;
 316         }
 317
 318         /* update current MAC address to NVS */
 319         nvs_ptr[11] = wl->mac_addr[0];
 320         nvs_ptr[10] = wl->mac_addr[1];
 321         nvs_ptr[6] = wl->mac_addr[2];
 322         nvs_ptr[5] = wl->mac_addr[3];
 323         nvs_ptr[4] = wl->mac_addr[4];
 324         nvs_ptr[3] = wl->mac_addr[5];
 325
 326         /*
 327          * Layout before the actual NVS tables:
 328          * 1 byte : burst length.
 329          * 2 bytes: destination address.
 330          * n bytes: data to burst copy.
 331          *
 332          * This is ended by a 0 length, then the NVS tables.
 333          */
 334
 335         /* FIXME: Do we need to check here whether the LSB is 1? */
 336         while (nvs_ptr[0]) {
 337                 burst_len = nvs_ptr[0];
 338                 dest_addr = (nvs_ptr[1] & 0xfe) | ((u32)(nvs_ptr[2] << 8));
 339
 340                 /*
 341                  * Due to our new wl1271_translate_reg_addr function,
 342                  * we need to add the REGISTER_BASE to the destination
 343                  */
 344                 dest_addr += REGISTERS_BASE;
 345
 346                 /* We move our pointer to the data */
 347                 nvs_ptr += 3;
 348
 349                 for (i = 0; i < burst_len; i++) {
 350                         val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
 351                                | (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
 352
 353                         wl1271_debug(DEBUG_BOOT,
 354                                      "nvs burst write 0x%x: 0x%x",
 355                                      dest_addr, val);
 356                         wl1271_write32(wl, dest_addr, val);
 357
 358                         nvs_ptr += 4;
 359                         dest_addr += 4;
 360                 }
 361         }
 362
 363         /*
 364          * We've reached the first zero length, the first NVS table
 365          * is located at an aligned offset which is at least 7 bytes further.
 366          * NOTE: The wl->nvs->nvs element must be first, in order to
 367          * simplify the casting, we assume it is at the beginning of
 368          * the wl->nvs structure.
 369          */
 370         nvs_ptr = (u8 *)wl->nvs +
 371                         ALIGN(nvs_ptr - (u8 *)wl->nvs + 7, 4);
 372         nvs_len -= nvs_ptr - (u8 *)wl->nvs;
 373
 374         /* Now we must set the partition correctly */
 375         wl1271_set_partition(wl, &part_table[PART_WORK]);
 376
 377         /* Copy the NVS tables to a new block to ensure alignment */
 378         nvs_aligned = kmemdup(nvs_ptr, nvs_len, GFP_KERNEL);
 379         if (!nvs_aligned)
 380                 return -ENOMEM;
 381
 382         /* And finally we upload the NVS tables */
 383         wl1271_write(wl, CMD_MBOX_ADDRESS, nvs_aligned, nvs_len, false);
 384
 385         kfree(nvs_aligned);
 386         return 0;
 387 }
 388
 389 static void wl1271_boot_enable_interrupts(struct wl1271 *wl)
 390 {
 391         wl1271_enable_interrupts(wl);
 392         wl1271_write32(wl, ACX_REG_INTERRUPT_MASK,
 393                        WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
 394         wl1271_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
 395 }
 396
 397 static int wl1271_boot_soft_reset(struct wl1271 *wl)
 398 {
 399         unsigned long timeout;
 400         u32 boot_data;
 401
 402         /* perform soft reset */
 403         wl1271_write32(wl, ACX_REG_SLV_SOFT_RESET, ACX_SLV_SOFT_RESET_BIT);
 404
 405         /* SOFT_RESET is self clearing */
 406         timeout = jiffies + usecs_to_jiffies(SOFT_RESET_MAX_TIME);
 407         while (1) {
 408                 boot_data = wl1271_read32(wl, ACX_REG_SLV_SOFT_RESET);
 409                 wl1271_debug(DEBUG_BOOT, "soft reset bootdata 0x%x", boot_data);
 410                 if ((boot_data & ACX_SLV_SOFT_RESET_BIT) == 0)
 411                         break;
 412
 413                 if (time_after(jiffies, timeout)) {
 414                         /* 1.2 check pWhalBus->uSelfClearTime if the
 415                          * timeout was reached */
 416                         wl1271_error("soft reset timeout");
 417                         return -1;
 418                 }
 419
 420                 udelay(SOFT_RESET_STALL_TIME);
 421         }
 422
 423         /* disable Rx/Tx */
 424         wl1271_write32(wl, ENABLE, 0x0);
 425
 426         /* disable auto calibration on start*/
 427         wl1271_write32(wl, SPARE_A2, 0xffff);
 428
 429         return 0;
 430 }
 431
 432 static int wl1271_boot_run_firmware(struct wl1271 *wl)
 433 {
 434         int loop, ret;
 435         u32 chip_id, intr;
 436
 437         wl1271_boot_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);
 438
 439         chip_id = wl1271_read32(wl, CHIP_ID_B);
 440
 441         wl1271_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x", chip_id);
 442
 443         if (chip_id != wl->chip.id) {
 444                 wl1271_error("chip id doesn't match after firmware boot");
 445                 return -EIO;
 446         }
 447
 448         /* wait for init to complete */
 449         loop = 0;
 450         while (loop++ < INIT_LOOP) {
 451                 udelay(INIT_LOOP_DELAY);
 452                 intr = wl1271_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
 453
 454                 if (intr == 0xffffffff) {
 455                         wl1271_error("error reading hardware complete "
 456                                      "init indication");
 457                         return -EIO;
 458                 }
 459                 /* check that ACX_INTR_INIT_COMPLETE is enabled */
 460                 else if (intr & WL1271_ACX_INTR_INIT_COMPLETE) {
 461                         wl1271_write32(wl, ACX_REG_INTERRUPT_ACK,
 462                                        WL1271_ACX_INTR_INIT_COMPLETE);
 463                         break;
 464                 }
 465         }
 466
 467         if (loop > INIT_LOOP) {
 468                 wl1271_error("timeout waiting for the hardware to "
 469                              "complete initialization");
 470                 return -EIO;
 471         }
 472
 473         /* get hardware config command mail box */
 474         wl->cmd_box_addr = wl1271_read32(wl, REG_COMMAND_MAILBOX_PTR);
 475
 476         /* get hardware config event mail box */
 477         wl->event_box_addr = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
 478
 479         /* set the working partition to its "running" mode offset */
 480         wl1271_set_partition(wl, &part_table[PART_WORK]);
 481
 482         wl1271_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x",
 483                      wl->cmd_box_addr, wl->event_box_addr);
 484
 485         wl1271_boot_fw_version(wl);
 486
 487         /*
 488          * in case of full asynchronous mode the firmware event must be
 489          * ready to receive event from the command mailbox
 490          */
 491
 492         /* unmask required mbox events  */
 493         wl->event_mask = BSS_LOSE_EVENT_ID |
 494                 SCAN_COMPLETE_EVENT_ID |
 495                 PS_REPORT_EVENT_ID |
 496                 DISCONNECT_EVENT_COMPLETE_ID |
 497                 RSSI_SNR_TRIGGER_0_EVENT_ID |
 498                 PSPOLL_DELIVERY_FAILURE_EVENT_ID |
 499                 SOFT_GEMINI_SENSE_EVENT_ID |
 500                 PERIODIC_SCAN_REPORT_EVENT_ID |
 501                 PERIODIC_SCAN_COMPLETE_EVENT_ID |
 502                 DUMMY_PACKET_EVENT_ID |
 503                 PEER_REMOVE_COMPLETE_EVENT_ID |
 504                 BA_SESSION_RX_CONSTRAINT_EVENT_ID |
 505                 REMAIN_ON_CHANNEL_COMPLETE_EVENT_ID |
 506                 INACTIVE_STA_EVENT_ID |
 507                 MAX_TX_RETRY_EVENT_ID |
 508                 CHANNEL_SWITCH_COMPLETE_EVENT_ID;
 509
 510         ret = wl1271_event_unmask(wl);
 511         if (ret < 0) {
 512                 wl1271_error("EVENT mask setting failed");
 513                 return ret;
 514         }
 515
 516         wl1271_event_mbox_config(wl);
 517
 518         /* firmware startup completed */
 519         return 0;
 520 }
 521
 522 static int wl1271_boot_write_irq_polarity(struct wl1271 *wl)
 523 {
 524         u32 polarity;
 525
 526         polarity = wl1271_top_reg_read(wl, OCP_REG_POLARITY);
 527
 528         /* We use HIGH polarity, so unset the LOW bit */
 529         polarity &= ~POLARITY_LOW;
 530         wl1271_top_reg_write(wl, OCP_REG_POLARITY, polarity);
 531
 532         return 0;
 533 }
 534
 535 static void wl1271_boot_hw_version(struct wl1271 *wl)
 536 {
 537         u32 fuse;
 538
 539         if (wl->chip.id == CHIP_ID_1283_PG20)
 540                 fuse = wl1271_top_reg_read(wl, WL128X_REG_FUSE_DATA_2_1);
 541         else
 542                 fuse = wl1271_top_reg_read(wl, WL127X_REG_FUSE_DATA_2_1);
 543         fuse = (fuse & PG_VER_MASK) >> PG_VER_OFFSET;
 544
 545         wl->hw_pg_ver = (s8)fuse;
 546 }
 547
 548 static int wl128x_switch_tcxo_to_fref(struct wl1271 *wl)
 549 {
 550         u16 spare_reg;
 551
 552         /* Mask bits [2] & [8:4] in the sys_clk_cfg register */
 553         spare_reg = wl1271_top_reg_read(wl, WL_SPARE_REG);
 554         if (spare_reg == 0xFFFF)
 555                 return -EFAULT;
 556         spare_reg |= (BIT(3) | BIT(5) | BIT(6));
 557         wl1271_top_reg_write(wl, WL_SPARE_REG, spare_reg);
 558
 559         /* Enable FREF_CLK_REQ & mux MCS and coex PLLs to FREF */
 560         wl1271_top_reg_write(wl, SYS_CLK_CFG_REG,
 561                              WL_CLK_REQ_TYPE_PG2 | MCS_PLL_CLK_SEL_FREF);
 562
 563         /* Delay execution for 15msec, to let the HW settle */
 564         mdelay(15);
 565
 566         return 0;
 567 }
 568
 569 static bool wl128x_is_tcxo_valid(struct wl1271 *wl)
 570 {
 571         u16 tcxo_detection;
 572
 573         tcxo_detection = wl1271_top_reg_read(wl, TCXO_CLK_DETECT_REG);
 574         if (tcxo_detection & TCXO_DET_FAILED)
 575                 return false;
 576
 577         return true;
 578 }
 579
 580 static bool wl128x_is_fref_valid(struct wl1271 *wl)
 581 {
 582         u16 fref_detection;
 583
 584         fref_detection = wl1271_top_reg_read(wl, FREF_CLK_DETECT_REG);
 585         if (fref_detection & FREF_CLK_DETECT_FAIL)
 586                 return false;
 587
 588         return true;
 589 }
 590
 591 static int wl128x_manually_configure_mcs_pll(struct wl1271 *wl)
 592 {
 593         wl1271_top_reg_write(wl, MCS_PLL_M_REG, MCS_PLL_M_REG_VAL);
 594         wl1271_top_reg_write(wl, MCS_PLL_N_REG, MCS_PLL_N_REG_VAL);
 595         wl1271_top_reg_write(wl, MCS_PLL_CONFIG_REG, MCS_PLL_CONFIG_REG_VAL);
 596
 597         return 0;
 598 }
 599
 600 static int wl128x_configure_mcs_pll(struct wl1271 *wl, int clk)
 601 {
 602         u16 spare_reg;
 603         u16 pll_config;
 604         u8 input_freq;
 605
 606         /* Mask bits [3:1] in the sys_clk_cfg register */
 607         spare_reg = wl1271_top_reg_read(wl, WL_SPARE_REG);
 608         if (spare_reg == 0xFFFF)
 609                 return -EFAULT;
 610         spare_reg |= BIT(2);
 611         wl1271_top_reg_write(wl, WL_SPARE_REG, spare_reg);
 612
 613         /* Handle special cases of the TCXO clock */
 614         if (wl->tcxo_clock == WL12XX_TCXOCLOCK_16_8 ||
 615             wl->tcxo_clock == WL12XX_TCXOCLOCK_33_6)
 616                 return wl128x_manually_configure_mcs_pll(wl);
 617
 618         /* Set the input frequency according to the selected clock source */
 619         input_freq = (clk & 1) + 1;
 620
 621         pll_config = wl1271_top_reg_read(wl, MCS_PLL_CONFIG_REG);
 622         if (pll_config == 0xFFFF)
 623                 return -EFAULT;
 624         pll_config |= (input_freq << MCS_SEL_IN_FREQ_SHIFT);
 625         pll_config |= MCS_PLL_ENABLE_HP;
 626         wl1271_top_reg_write(wl, MCS_PLL_CONFIG_REG, pll_config);
 627
 628         return 0;
 629 }
 630
 631 /*
 632  * WL128x has two clocks input - TCXO and FREF.
 633  * TCXO is the main clock of the device, while FREF is used to sync
 634  * between the GPS and the cellular modem.
 635  * In cases where TCXO is 32.736MHz or 16.368MHz, the FREF will be used
 636  * as the WLAN/BT main clock.
 637  */
 638 static int wl128x_boot_clk(struct wl1271 *wl, int *selected_clock)
 639 {
 640         u16 sys_clk_cfg;
 641
 642         /* For XTAL-only modes, FREF will be used after switching from TCXO */
 643         if (wl->ref_clock == WL12XX_REFCLOCK_26_XTAL ||
 644             wl->ref_clock == WL12XX_REFCLOCK_38_XTAL) {
 645                 if (!wl128x_switch_tcxo_to_fref(wl))
 646                         return -EINVAL;
 647                 goto fref_clk;
 648         }
 649
 650         /* Query the HW, to determine which clock source we should use */
 651         sys_clk_cfg = wl1271_top_reg_read(wl, SYS_CLK_CFG_REG);
 652         if (sys_clk_cfg == 0xFFFF)
 653                 return -EINVAL;
 654         if (sys_clk_cfg & PRCM_CM_EN_MUX_WLAN_FREF)
 655                 goto fref_clk;
 656
 657         /* If TCXO is either 32.736MHz or 16.368MHz, switch to FREF */
 658         if (wl->tcxo_clock == WL12XX_TCXOCLOCK_16_368 ||
 659             wl->tcxo_clock == WL12XX_TCXOCLOCK_32_736) {
 660                 if (!wl128x_switch_tcxo_to_fref(wl))
 661                         return -EINVAL;
 662                 goto fref_clk;
 663         }
 664
 665         /* TCXO clock is selected */
 666         if (!wl128x_is_tcxo_valid(wl))
 667                 return -EINVAL;
 668         *selected_clock = wl->tcxo_clock;
 669         goto config_mcs_pll;
 670
 671 fref_clk:
 672         /* FREF clock is selected */
 673         if (!wl128x_is_fref_valid(wl))
 674                 return -EINVAL;
 675         *selected_clock = wl->ref_clock;
 676
 677 config_mcs_pll:
 678         return wl128x_configure_mcs_pll(wl, *selected_clock);
 679 }
 680
 681 static int wl127x_boot_clk(struct wl1271 *wl)
 682 {
 683         u32 pause;
 684         u32 clk;
 685
 686         if (((wl->hw_pg_ver & PG_MAJOR_VER_MASK) >> PG_MAJOR_VER_OFFSET) < 3)
 687                 wl->quirks |= WL12XX_QUIRK_END_OF_TRANSACTION;
 688
 689         if (wl->ref_clock == CONF_REF_CLK_19_2_E ||
 690             wl->ref_clock == CONF_REF_CLK_38_4_E ||
 691             wl->ref_clock == CONF_REF_CLK_38_4_M_XTAL)
 692                 /* ref clk: 19.2/38.4/38.4-XTAL */
 693                 clk = 0x3;
 694         else if (wl->ref_clock == CONF_REF_CLK_26_E ||
 695                  wl->ref_clock == CONF_REF_CLK_52_E)
 696                 /* ref clk: 26/52 */
 697                 clk = 0x5;
 698         else
 699                 return -EINVAL;
 700
 701         if (wl->ref_clock != CONF_REF_CLK_19_2_E) {
 702                 u16 val;
 703                 /* Set clock type (open drain) */
 704                 val = wl1271_top_reg_read(wl, OCP_REG_CLK_TYPE);
 705                 val &= FREF_CLK_TYPE_BITS;
 706                 wl1271_top_reg_write(wl, OCP_REG_CLK_TYPE, val);
 707
 708                 /* Set clock pull mode (no pull) */
 709                 val = wl1271_top_reg_read(wl, OCP_REG_CLK_PULL);
 710                 val |= NO_PULL;
 711                 wl1271_top_reg_write(wl, OCP_REG_CLK_PULL, val);
 712         } else {
 713                 u16 val;
 714                 /* Set clock polarity */
 715                 val = wl1271_top_reg_read(wl, OCP_REG_CLK_POLARITY);
 716                 val &= FREF_CLK_POLARITY_BITS;
 717                 val |= CLK_REQ_OUTN_SEL;
 718                 wl1271_top_reg_write(wl, OCP_REG_CLK_POLARITY, val);
 719         }
 720
 721         wl1271_write32(wl, PLL_PARAMETERS, clk);
 722
 723         pause = wl1271_read32(wl, PLL_PARAMETERS);
 724
 725         wl1271_debug(DEBUG_BOOT, "pause1 0x%x", pause);
 726
 727         pause &= ~(WU_COUNTER_PAUSE_VAL);
 728         pause |= WU_COUNTER_PAUSE_VAL;
 729         wl1271_write32(wl, WU_COUNTER_PAUSE, pause);
 730
 731         return 0;
 732 }
 733
 734 /* uploads NVS and firmware */
 735 int wl1271_load_firmware(struct wl1271 *wl)
 736 {
 737         int ret = 0;
 738         u32 tmp, clk;
 739         int selected_clock = -1;
 740
 741         wl1271_boot_hw_version(wl);
 742
 743         if (wl->chip.id == CHIP_ID_1283_PG20) {
 744                 ret = wl128x_boot_clk(wl, &selected_clock);
 745                 if (ret < 0)
 746                         goto out;
 747         } else {
 748                 ret = wl127x_boot_clk(wl);
 749                 if (ret < 0)
 750                         goto out;
 751         }
 752
 753         /* Continue the ELP wake up sequence */
 754         wl1271_write32(wl, WELP_ARM_COMMAND, WELP_ARM_COMMAND_VAL);
 755         udelay(500);
 756
 757         wl1271_set_partition(wl, &part_table[PART_DRPW]);
 758
 759         /* Read-modify-write DRPW_SCRATCH_START register (see next state)
 760            to be used by DRPw FW. The RTRIM value will be added by the FW
 761            before taking DRPw out of reset */
 762
 763         wl1271_debug(DEBUG_BOOT, "DRPW_SCRATCH_START %08x", DRPW_SCRATCH_START);
 764         clk = wl1271_read32(wl, DRPW_SCRATCH_START);
 765
 766         wl1271_debug(DEBUG_BOOT, "clk2 0x%x", clk);
 767
 768         if (wl->chip.id == CHIP_ID_1283_PG20) {
 769                 clk |= ((selected_clock & 0x3) << 1) << 4;
 770         } else {
 771                 clk |= (wl->ref_clock << 1) << 4;
 772         }
 773
 774         wl1271_write32(wl, DRPW_SCRATCH_START, clk);
 775
 776         wl1271_set_partition(wl, &part_table[PART_WORK]);
 777
 778         /* Disable interrupts */
 779         wl1271_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
 780
 781         ret = wl1271_boot_soft_reset(wl);
 782         if (ret < 0)
 783                 goto out;
 784
 785         /* 2. start processing NVS file */
 786         ret = wl1271_boot_upload_nvs(wl);
 787         if (ret < 0)
 788                 goto out;
 789
 790         /* write firmware's last address (ie. it's length) to
 791          * ACX_EEPROMLESS_IND_REG */
 792         wl1271_debug(DEBUG_BOOT, "ACX_EEPROMLESS_IND_REG");
 793
 794         wl1271_write32(wl, ACX_EEPROMLESS_IND_REG, ACX_EEPROMLESS_IND_REG);
 795
 796         tmp = wl1271_read32(wl, CHIP_ID_B);
 797
 798         wl1271_debug(DEBUG_BOOT, "chip id 0x%x", tmp);
 799
 800         /* 6. read the EEPROM parameters */
 801         tmp = wl1271_read32(wl, SCR_PAD2);
 802
 803         /* WL1271: The reference driver skips steps 7 to 10 (jumps directly
 804          * to upload_fw) */
 805
 806         if (wl->chip.id == CHIP_ID_1283_PG20)
 807                 wl1271_top_reg_write(wl, SDIO_IO_DS, wl->conf.hci_io_ds);
 808
 809         ret = wl1271_boot_upload_firmware(wl);
 810         if (ret < 0)
 811                 goto out;
 812
 813 out:
 814         return ret;
 815 }
 816 EXPORT_SYMBOL_GPL(wl1271_load_firmware);
 817
 818 int wl1271_boot(struct wl1271 *wl)
 819 {
 820         int ret;
 821
 822         /* upload NVS and firmware */
 823         ret = wl1271_load_firmware(wl);
 824         if (ret)
 825                 return ret;
 826
 827         /* 10.5 start firmware */
 828         ret = wl1271_boot_run_firmware(wl);
 829         if (ret < 0)
 830                 goto out;
 831
 832         ret = wl1271_boot_write_irq_polarity(wl);
 833         if (ret < 0)
 834                 goto out;
 835
 836         wl1271_write32(wl, ACX_REG_INTERRUPT_MASK,
 837                        WL1271_ACX_ALL_EVENTS_VECTOR);
 838
 839         /* Enable firmware interrupts now */
 840         wl1271_boot_enable_interrupts(wl);
 841
 842         wl1271_event_mbox_config(wl);
 843
 844 out:
 845         return ret;
 846 }