drivers/net/wireless/wl12xx/wl1271_boot.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 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/gpio.h>
  25
  26 #include "wl1271_acx.h"
  27 #include "wl1271_reg.h"
  28 #include "wl1271_boot.h"
  29 #include "wl1271_spi.h"
  30 #include "wl1271_event.h"
  31
  32 static struct wl1271_partition_set part_table[PART_TABLE_LEN] = {
  33         [PART_DOWN] = {
  34                 .mem = {
  35                         .start = 0x00000000,
  36                         .size  = 0x000177c0
  37                 },
  38                 .reg = {
  39                         .start = REGISTERS_BASE,
  40                         .size  = 0x00008800
  41                 },
  42                 .mem2 = {
  43                         .start = 0x00000000,
  44                         .size  = 0x00000000
  45                 },
  46                 .mem3 = {
  47                         .start = 0x00000000,
  48                         .size  = 0x00000000
  49                 },
  50         },
  51
  52         [PART_WORK] = {
  53                 .mem = {
  54                         .start = 0x00040000,
  55                         .size  = 0x00014fc0
  56                 },
  57                 .reg = {
  58                         .start = REGISTERS_BASE,
  59                         .size  = 0x0000a000
  60                 },
  61                 .mem2 = {
  62                         .start = 0x003004f8,
  63                         .size  = 0x00000004
  64                 },
  65                 .mem3 = {
  66                         .start = 0x00040404,
  67                         .size  = 0x00000000
  68                 },
  69         },
  70
  71         [PART_DRPW] = {
  72                 .mem = {
  73                         .start = 0x00040000,
  74                         .size  = 0x00014fc0
  75                 },
  76                 .reg = {
  77                         .start = DRPW_BASE,
  78                         .size  = 0x00006000
  79                 },
  80                 .mem2 = {
  81                         .start = 0x00000000,
  82                         .size  = 0x00000000
  83                 },
  84                 .mem3 = {
  85                         .start = 0x00000000,
  86                         .size  = 0x00000000
  87                 }
  88         }
  89 };
  90
  91 static void wl1271_boot_set_ecpu_ctrl(struct wl1271 *wl, u32 flag)
  92 {
  93         u32 cpu_ctrl;
  94
  95         /* 10.5.0 run the firmware (I) */
  96         cpu_ctrl = wl1271_spi_read32(wl, ACX_REG_ECPU_CONTROL);
  97
  98         /* 10.5.1 run the firmware (II) */
  99         cpu_ctrl |= flag;
 100         wl1271_spi_write32(wl, ACX_REG_ECPU_CONTROL, cpu_ctrl);
 101 }
 102
 103 static void wl1271_boot_fw_version(struct wl1271 *wl)
 104 {
 105         struct wl1271_static_data static_data;
 106
 107         wl1271_spi_read(wl, wl->cmd_box_addr,
 108                         &static_data, sizeof(static_data), false);
 109
 110         strncpy(wl->chip.fw_ver, static_data.fw_version,
 111                 sizeof(wl->chip.fw_ver));
 112
 113         /* make sure the string is NULL-terminated */
 114         wl->chip.fw_ver[sizeof(wl->chip.fw_ver) - 1] = '\0';
 115 }
 116
 117 static int wl1271_boot_upload_firmware_chunk(struct wl1271 *wl, void *buf,
 118                                              size_t fw_data_len, u32 dest)
 119 {
 120         struct wl1271_partition_set partition;
 121         int addr, chunk_num, partition_limit;
 122         u8 *p, *chunk;
 123
 124         /* whal_FwCtrl_LoadFwImageSm() */
 125
 126         wl1271_debug(DEBUG_BOOT, "starting firmware upload");
 127
 128         wl1271_debug(DEBUG_BOOT, "fw_data_len %zd chunk_size %d",
 129                      fw_data_len, CHUNK_SIZE);
 130
 131         if ((fw_data_len % 4) != 0) {
 132                 wl1271_error("firmware length not multiple of four");
 133                 return -EIO;
 134         }
 135
 136         chunk = kmalloc(CHUNK_SIZE, GFP_KERNEL);
 137         if (!buf) {
 138                 wl1271_error("allocation for firmware upload chunk failed");
 139                 return -ENOMEM;
 140         }
 141
 142         memcpy(&partition, &part_table[PART_DOWN], sizeof(partition));
 143         partition.mem.start = dest;
 144         wl1271_set_partition(wl, &partition);
 145
 146         /* 10.1 set partition limit and chunk num */
 147         chunk_num = 0;
 148         partition_limit = part_table[PART_DOWN].mem.size;
 149
 150         while (chunk_num < fw_data_len / CHUNK_SIZE) {
 151                 /* 10.2 update partition, if needed */
 152                 addr = dest + (chunk_num + 2) * CHUNK_SIZE;
 153                 if (addr > partition_limit) {
 154                         addr = dest + chunk_num * CHUNK_SIZE;
 155                         partition_limit = chunk_num * CHUNK_SIZE +
 156                                 part_table[PART_DOWN].mem.size;
 157                         partition.mem.start = addr;
 158                         wl1271_set_partition(wl, &partition);
 159                 }
 160
 161                 /* 10.3 upload the chunk */
 162                 addr = dest + chunk_num * CHUNK_SIZE;
 163                 p = buf + chunk_num * CHUNK_SIZE;
 164                 memcpy(chunk, p, CHUNK_SIZE);
 165                 wl1271_debug(DEBUG_BOOT, "uploading fw chunk 0x%p to 0x%x",
 166                              p, addr);
 167                 wl1271_spi_write(wl, addr, chunk, CHUNK_SIZE, false);
 168
 169                 chunk_num++;
 170         }
 171
 172         /* 10.4 upload the last chunk */
 173         addr = dest + chunk_num * CHUNK_SIZE;
 174         p = buf + chunk_num * CHUNK_SIZE;
 175         memcpy(chunk, p, fw_data_len % CHUNK_SIZE);
 176         wl1271_debug(DEBUG_BOOT, "uploading fw last chunk (%zd B) 0x%p to 0x%x",
 177                      fw_data_len % CHUNK_SIZE, p, addr);
 178         wl1271_spi_write(wl, addr, chunk, fw_data_len % CHUNK_SIZE, false);
 179
 180         kfree(chunk);
 181         return 0;
 182 }
 183
 184 static int wl1271_boot_upload_firmware(struct wl1271 *wl)
 185 {
 186         u32 chunks, addr, len;
 187         u8 *fw;
 188
 189         fw = wl->fw;
 190         chunks = be32_to_cpup((u32 *) fw);
 191         fw += sizeof(u32);
 192
 193         wl1271_debug(DEBUG_BOOT, "firmware chunks to be uploaded: %u", chunks);
 194
 195         while (chunks--) {
 196                 addr = be32_to_cpup((u32 *) fw);
 197                 fw += sizeof(u32);
 198                 len = be32_to_cpup((u32 *) fw);
 199                 fw += sizeof(u32);
 200
 201                 if (len > 300000) {
 202                         wl1271_info("firmware chunk too long: %u", len);
 203                         return -EINVAL;
 204                 }
 205                 wl1271_debug(DEBUG_BOOT, "chunk %d addr 0x%x len %u",
 206                              chunks, addr, len);
 207                 wl1271_boot_upload_firmware_chunk(wl, fw, len, addr);
 208                 fw += len;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int wl1271_boot_upload_nvs(struct wl1271 *wl)
 215 {
 216         size_t nvs_len, burst_len;
 217         int i;
 218         u32 dest_addr, val;
 219         u8 *nvs_ptr, *nvs, *nvs_aligned;
 220
 221         nvs = wl->nvs;
 222         if (nvs == NULL)
 223                 return -ENODEV;
 224
 225         nvs_ptr = nvs;
 226
 227         nvs_len = wl->nvs_len;
 228
 229         /* Update the device MAC address into the nvs */
 230         nvs[11] = wl->mac_addr[0];
 231         nvs[10] = wl->mac_addr[1];
 232         nvs[6] = wl->mac_addr[2];
 233         nvs[5] = wl->mac_addr[3];
 234         nvs[4] = wl->mac_addr[4];
 235         nvs[3] = wl->mac_addr[5];
 236
 237         /*
 238          * Layout before the actual NVS tables:
 239          * 1 byte : burst length.
 240          * 2 bytes: destination address.
 241          * n bytes: data to burst copy.
 242          *
 243          * This is ended by a 0 length, then the NVS tables.
 244          */
 245
 246         /* FIXME: Do we need to check here whether the LSB is 1? */
 247         while (nvs_ptr[0]) {
 248                 burst_len = nvs_ptr[0];
 249                 dest_addr = (nvs_ptr[1] & 0xfe) | ((u32)(nvs_ptr[2] << 8));
 250
 251                 /* FIXME: Due to our new wl1271_translate_reg_addr function,
 252                    we need to add the REGISTER_BASE to the destination */
 253                 dest_addr += REGISTERS_BASE;
 254
 255                 /* We move our pointer to the data */
 256                 nvs_ptr += 3;
 257
 258                 for (i = 0; i < burst_len; i++) {
 259                         val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
 260                                | (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
 261
 262                         wl1271_debug(DEBUG_BOOT,
 263                                      "nvs burst write 0x%x: 0x%x",
 264                                      dest_addr, val);
 265                         wl1271_spi_write32(wl, dest_addr, val);
 266
 267                         nvs_ptr += 4;
 268                         dest_addr += 4;
 269                 }
 270         }
 271
 272         /*
 273          * We've reached the first zero length, the first NVS table
 274          * is 7 bytes further.
 275          */
 276         nvs_ptr += 7;
 277         nvs_len -= nvs_ptr - nvs;
 278         nvs_len = ALIGN(nvs_len, 4);
 279
 280         /* FIXME: The driver sets the partition here, but this is not needed,
 281            since it sets to the same one as currently in use */
 282         /* Now we must set the partition correctly */
 283         wl1271_set_partition(wl, &part_table[PART_WORK]);
 284
 285         /* Copy the NVS tables to a new block to ensure alignment */
 286         nvs_aligned = kmemdup(nvs_ptr, nvs_len, GFP_KERNEL);
 287
 288         /* And finally we upload the NVS tables */
 289         /* FIXME: In wl1271, we upload everything at once.
 290            No endianness handling needed here?! The ref driver doesn't do
 291            anything about it at this point */
 292         wl1271_spi_write(wl, CMD_MBOX_ADDRESS, nvs_aligned, nvs_len, false);
 293
 294         kfree(nvs_aligned);
 295         return 0;
 296 }
 297
 298 static void wl1271_boot_enable_interrupts(struct wl1271 *wl)
 299 {
 300         enable_irq(wl->irq);
 301         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_MASK,
 302                            WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
 303         wl1271_spi_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
 304 }
 305
 306 static int wl1271_boot_soft_reset(struct wl1271 *wl)
 307 {
 308         unsigned long timeout;
 309         u32 boot_data;
 310
 311         /* perform soft reset */
 312         wl1271_spi_write32(wl, ACX_REG_SLV_SOFT_RESET,
 313                            ACX_SLV_SOFT_RESET_BIT);
 314
 315         /* SOFT_RESET is self clearing */
 316         timeout = jiffies + usecs_to_jiffies(SOFT_RESET_MAX_TIME);
 317         while (1) {
 318                 boot_data = wl1271_spi_read32(wl, ACX_REG_SLV_SOFT_RESET);
 319                 wl1271_debug(DEBUG_BOOT, "soft reset bootdata 0x%x", boot_data);
 320                 if ((boot_data & ACX_SLV_SOFT_RESET_BIT) == 0)
 321                         break;
 322
 323                 if (time_after(jiffies, timeout)) {
 324                         /* 1.2 check pWhalBus->uSelfClearTime if the
 325                          * timeout was reached */
 326                         wl1271_error("soft reset timeout");
 327                         return -1;
 328                 }
 329
 330                 udelay(SOFT_RESET_STALL_TIME);
 331         }
 332
 333         /* disable Rx/Tx */
 334         wl1271_spi_write32(wl, ENABLE, 0x0);
 335
 336         /* disable auto calibration on start*/
 337         wl1271_spi_write32(wl, SPARE_A2, 0xffff);
 338
 339         return 0;
 340 }
 341
 342 static int wl1271_boot_run_firmware(struct wl1271 *wl)
 343 {
 344         int loop, ret;
 345         u32 chip_id, interrupt;
 346
 347         wl1271_boot_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);
 348
 349         chip_id = wl1271_spi_read32(wl, CHIP_ID_B);
 350
 351         wl1271_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x", chip_id);
 352
 353         if (chip_id != wl->chip.id) {
 354                 wl1271_error("chip id doesn't match after firmware boot");
 355                 return -EIO;
 356         }
 357
 358         /* wait for init to complete */
 359         loop = 0;
 360         while (loop++ < INIT_LOOP) {
 361                 udelay(INIT_LOOP_DELAY);
 362                 interrupt = wl1271_spi_read32(wl,
 363                                               ACX_REG_INTERRUPT_NO_CLEAR);
 364
 365                 if (interrupt == 0xffffffff) {
 366                         wl1271_error("error reading hardware complete "
 367                                      "init indication");
 368                         return -EIO;
 369                 }
 370                 /* check that ACX_INTR_INIT_COMPLETE is enabled */
 371                 else if (interrupt & WL1271_ACX_INTR_INIT_COMPLETE) {
 372                         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_ACK,
 373                                            WL1271_ACX_INTR_INIT_COMPLETE);
 374                         break;
 375                 }
 376         }
 377
 378         if (loop >= INIT_LOOP) {
 379                 wl1271_error("timeout waiting for the hardware to "
 380                              "complete initialization");
 381                 return -EIO;
 382         }
 383
 384         /* get hardware config command mail box */
 385         wl->cmd_box_addr = wl1271_spi_read32(wl, REG_COMMAND_MAILBOX_PTR);
 386
 387         /* get hardware config event mail box */
 388         wl->event_box_addr = wl1271_spi_read32(wl, REG_EVENT_MAILBOX_PTR);
 389
 390         /* set the working partition to its "running" mode offset */
 391         wl1271_set_partition(wl, &part_table[PART_WORK]);
 392
 393         wl1271_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x",
 394                      wl->cmd_box_addr, wl->event_box_addr);
 395
 396         wl1271_boot_fw_version(wl);
 397
 398         /*
 399          * in case of full asynchronous mode the firmware event must be
 400          * ready to receive event from the command mailbox
 401          */
 402
 403         /* enable gpio interrupts */
 404         wl1271_boot_enable_interrupts(wl);
 405
 406         /* unmask required mbox events  */
 407         wl->event_mask = BSS_LOSE_EVENT_ID |
 408                 SCAN_COMPLETE_EVENT_ID;
 409
 410         ret = wl1271_event_unmask(wl);
 411         if (ret < 0) {
 412                 wl1271_error("EVENT mask setting failed");
 413                 return ret;
 414         }
 415
 416         wl1271_event_mbox_config(wl);
 417
 418         /* firmware startup completed */
 419         return 0;
 420 }
 421
 422 static int wl1271_boot_write_irq_polarity(struct wl1271 *wl)
 423 {
 424         u32 polarity;
 425
 426         polarity = wl1271_top_reg_read(wl, OCP_REG_POLARITY);
 427
 428         /* We use HIGH polarity, so unset the LOW bit */
 429         polarity &= ~POLARITY_LOW;
 430         wl1271_top_reg_write(wl, OCP_REG_POLARITY, polarity);
 431
 432         return 0;
 433 }
 434
 435 int wl1271_boot(struct wl1271 *wl)
 436 {
 437         int ret = 0;
 438         u32 tmp, clk, pause;
 439
 440         if (REF_CLOCK == 0 || REF_CLOCK == 2 || REF_CLOCK == 4)
 441                 /* ref clk: 19.2/38.4/38.4-XTAL */
 442                 clk = 0x3;
 443         else if (REF_CLOCK == 1 || REF_CLOCK == 3)
 444                 /* ref clk: 26/52 */
 445                 clk = 0x5;
 446
 447         if (REF_CLOCK != 0) {
 448                 u16 val;
 449                 /* Set clock type */
 450                 val = wl1271_top_reg_read(wl, OCP_REG_CLK_TYPE);
 451                 val &= FREF_CLK_TYPE_BITS;
 452                 val |= CLK_REQ_PRCM;
 453                 wl1271_top_reg_write(wl, OCP_REG_CLK_TYPE, val);
 454         } else {
 455                 u16 val;
 456                 /* Set clock polarity */
 457                 val = wl1271_top_reg_read(wl, OCP_REG_CLK_POLARITY);
 458                 val &= FREF_CLK_POLARITY_BITS;
 459                 val |= CLK_REQ_OUTN_SEL;
 460                 wl1271_top_reg_write(wl, OCP_REG_CLK_POLARITY, val);
 461         }
 462
 463         wl1271_spi_write32(wl, PLL_PARAMETERS, clk);
 464
 465         pause = wl1271_spi_read32(wl, PLL_PARAMETERS);
 466
 467         wl1271_debug(DEBUG_BOOT, "pause1 0x%x", pause);
 468
 469         pause &= ~(WU_COUNTER_PAUSE_VAL); /* FIXME: This should probably be
 470                                            * WU_COUNTER_PAUSE_VAL instead of
 471                                            * 0x3ff (magic number ).  How does
 472                                            * this work?! */
 473         pause |= WU_COUNTER_PAUSE_VAL;
 474         wl1271_spi_write32(wl, WU_COUNTER_PAUSE, pause);
 475
 476         /* Continue the ELP wake up sequence */
 477         wl1271_spi_write32(wl, WELP_ARM_COMMAND, WELP_ARM_COMMAND_VAL);
 478         udelay(500);
 479
 480         wl1271_set_partition(wl, &part_table[PART_DRPW]);
 481
 482         /* Read-modify-write DRPW_SCRATCH_START register (see next state)
 483            to be used by DRPw FW. The RTRIM value will be added by the FW
 484            before taking DRPw out of reset */
 485
 486         wl1271_debug(DEBUG_BOOT, "DRPW_SCRATCH_START %08x", DRPW_SCRATCH_START);
 487         clk = wl1271_spi_read32(wl, DRPW_SCRATCH_START);
 488
 489         wl1271_debug(DEBUG_BOOT, "clk2 0x%x", clk);
 490
 491         /* 2 */
 492         clk |= (REF_CLOCK << 1) << 4;
 493         wl1271_spi_write32(wl, DRPW_SCRATCH_START, clk);
 494
 495         wl1271_set_partition(wl, &part_table[PART_WORK]);
 496
 497         /* Disable interrupts */
 498         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
 499
 500         ret = wl1271_boot_soft_reset(wl);
 501         if (ret < 0)
 502                 goto out;
 503
 504         /* 2. start processing NVS file */
 505         ret = wl1271_boot_upload_nvs(wl);
 506         if (ret < 0)
 507                 goto out;
 508
 509         /* write firmware's last address (ie. it's length) to
 510          * ACX_EEPROMLESS_IND_REG */
 511         wl1271_debug(DEBUG_BOOT, "ACX_EEPROMLESS_IND_REG");
 512
 513         wl1271_spi_write32(wl, ACX_EEPROMLESS_IND_REG,
 514                            ACX_EEPROMLESS_IND_REG);
 515
 516         tmp = wl1271_spi_read32(wl, CHIP_ID_B);
 517
 518         wl1271_debug(DEBUG_BOOT, "chip id 0x%x", tmp);
 519
 520         /* 6. read the EEPROM parameters */
 521         tmp = wl1271_spi_read32(wl, SCR_PAD2);
 522
 523         ret = wl1271_boot_write_irq_polarity(wl);
 524         if (ret < 0)
 525                 goto out;
 526
 527         /* FIXME: Need to check whether this is really what we want */
 528         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_MASK,
 529                            WL1271_ACX_ALL_EVENTS_VECTOR);
 530
 531         /* WL1271: The reference driver skips steps 7 to 10 (jumps directly
 532          * to upload_fw) */
 533
 534         ret = wl1271_boot_upload_firmware(wl);
 535         if (ret < 0)
 536                 goto out;
 537
 538         /* 10.5 start firmware */
 539         ret = wl1271_boot_run_firmware(wl);
 540         if (ret < 0)
 541                 goto out;
 542
 543         /* set the wl1271 default filters */
 544         wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
 545         wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
 546
 547         wl1271_event_mbox_config(wl);
 548
 549 out:
 550         return ret;
 551 }