git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_sup.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/delay.h>
  10 #include <asm/uaccess.h>
  11
  12 static uint16_t qla2x00_nvram_request(scsi_qla_host_t *, uint32_t);
  13 static void qla2x00_nv_deselect(scsi_qla_host_t *);
  14 static void qla2x00_nv_write(scsi_qla_host_t *, uint16_t);
  15
  16 /*
  17  * NVRAM support routines
  18  */
  19
  20 /**
  21  * qla2x00_lock_nvram_access() -
  22  * @ha: HA context
  23  */
  24 void
  25 qla2x00_lock_nvram_access(scsi_qla_host_t *ha)
  26 {
  27         uint16_t data;
  28         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
  29
  30         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA2300(ha)) {
  31                 data = RD_REG_WORD(&reg->nvram);
  32                 while (data & NVR_BUSY) {
  33                         udelay(100);
  34                         data = RD_REG_WORD(&reg->nvram);
  35                 }
  36
  37                 /* Lock resource */
  38                 WRT_REG_WORD(&reg->u.isp2300.host_semaphore, 0x1);
  39                 RD_REG_WORD(&reg->u.isp2300.host_semaphore);
  40                 udelay(5);
  41                 data = RD_REG_WORD(&reg->u.isp2300.host_semaphore);
  42                 while ((data & BIT_0) == 0) {
  43                         /* Lock failed */
  44                         udelay(100);
  45                         WRT_REG_WORD(&reg->u.isp2300.host_semaphore, 0x1);
  46                         RD_REG_WORD(&reg->u.isp2300.host_semaphore);
  47                         udelay(5);
  48                         data = RD_REG_WORD(&reg->u.isp2300.host_semaphore);
  49                 }
  50         }
  51 }
  52
  53 /**
  54  * qla2x00_unlock_nvram_access() -
  55  * @ha: HA context
  56  */
  57 void
  58 qla2x00_unlock_nvram_access(scsi_qla_host_t *ha)
  59 {
  60         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
  61
  62         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA2300(ha)) {
  63                 WRT_REG_WORD(&reg->u.isp2300.host_semaphore, 0);
  64                 RD_REG_WORD(&reg->u.isp2300.host_semaphore);
  65         }
  66 }
  67
  68 /**
  69  * qla2x00_get_nvram_word() - Calculates word position in NVRAM and calls the
  70  *      request routine to get the word from NVRAM.
  71  * @ha: HA context
  72  * @addr: Address in NVRAM to read
  73  *
  74  * Returns the word read from nvram @addr.
  75  */
  76 uint16_t
  77 qla2x00_get_nvram_word(scsi_qla_host_t *ha, uint32_t addr)
  78 {
  79         uint16_t        data;
  80         uint32_t        nv_cmd;
  81
  82         nv_cmd = addr << 16;
  83         nv_cmd |= NV_READ_OP;
  84         data = qla2x00_nvram_request(ha, nv_cmd);
  85
  86         return (data);
  87 }
  88
  89 /**
  90  * qla2x00_write_nvram_word() - Write NVRAM data.
  91  * @ha: HA context
  92  * @addr: Address in NVRAM to write
  93  * @data: word to program
  94  */
  95 void
  96 qla2x00_write_nvram_word(scsi_qla_host_t *ha, uint32_t addr, uint16_t data)
  97 {
  98         int count;
  99         uint16_t word;
 100         uint32_t nv_cmd;
 101         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 102
 103         qla2x00_nv_write(ha, NVR_DATA_OUT);
 104         qla2x00_nv_write(ha, 0);
 105         qla2x00_nv_write(ha, 0);
 106
 107         for (word = 0; word < 8; word++)
 108                 qla2x00_nv_write(ha, NVR_DATA_OUT);
 109
 110         qla2x00_nv_deselect(ha);
 111
 112         /* Write data */
 113         nv_cmd = (addr << 16) | NV_WRITE_OP;
 114         nv_cmd |= data;
 115         nv_cmd <<= 5;
 116         for (count = 0; count < 27; count++) {
 117                 if (nv_cmd & BIT_31)
 118                         qla2x00_nv_write(ha, NVR_DATA_OUT);
 119                 else
 120                         qla2x00_nv_write(ha, 0);
 121
 122                 nv_cmd <<= 1;
 123         }
 124
 125         qla2x00_nv_deselect(ha);
 126
 127         /* Wait for NVRAM to become ready */
 128         WRT_REG_WORD(&reg->nvram, NVR_SELECT);
 129         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 130         do {
 131                 NVRAM_DELAY();
 132                 word = RD_REG_WORD(&reg->nvram);
 133         } while ((word & NVR_DATA_IN) == 0);
 134
 135         qla2x00_nv_deselect(ha);
 136
 137         /* Disable writes */
 138         qla2x00_nv_write(ha, NVR_DATA_OUT);
 139         for (count = 0; count < 10; count++)
 140                 qla2x00_nv_write(ha, 0);
 141
 142         qla2x00_nv_deselect(ha);
 143 }
 144
 145 static int
 146 qla2x00_write_nvram_word_tmo(scsi_qla_host_t *ha, uint32_t addr, uint16_t data,
 147     uint32_t tmo)
 148 {
 149         int ret, count;
 150         uint16_t word;
 151         uint32_t nv_cmd;
 152         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 153
 154         ret = QLA_SUCCESS;
 155
 156         qla2x00_nv_write(ha, NVR_DATA_OUT);
 157         qla2x00_nv_write(ha, 0);
 158         qla2x00_nv_write(ha, 0);
 159
 160         for (word = 0; word < 8; word++)
 161                 qla2x00_nv_write(ha, NVR_DATA_OUT);
 162
 163         qla2x00_nv_deselect(ha);
 164
 165         /* Write data */
 166         nv_cmd = (addr << 16) | NV_WRITE_OP;
 167         nv_cmd |= data;
 168         nv_cmd <<= 5;
 169         for (count = 0; count < 27; count++) {
 170                 if (nv_cmd & BIT_31)
 171                         qla2x00_nv_write(ha, NVR_DATA_OUT);
 172                 else
 173                         qla2x00_nv_write(ha, 0);
 174
 175                 nv_cmd <<= 1;
 176         }
 177
 178         qla2x00_nv_deselect(ha);
 179
 180         /* Wait for NVRAM to become ready */
 181         WRT_REG_WORD(&reg->nvram, NVR_SELECT);
 182         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 183         do {
 184                 NVRAM_DELAY();
 185                 word = RD_REG_WORD(&reg->nvram);
 186                 if (!--tmo) {
 187                         ret = QLA_FUNCTION_FAILED;
 188                         break;
 189                 }
 190         } while ((word & NVR_DATA_IN) == 0);
 191
 192         qla2x00_nv_deselect(ha);
 193
 194         /* Disable writes */
 195         qla2x00_nv_write(ha, NVR_DATA_OUT);
 196         for (count = 0; count < 10; count++)
 197                 qla2x00_nv_write(ha, 0);
 198
 199         qla2x00_nv_deselect(ha);
 200
 201         return ret;
 202 }
 203
 204 /**
 205  * qla2x00_nvram_request() - Sends read command to NVRAM and gets data from
 206  *      NVRAM.
 207  * @ha: HA context
 208  * @nv_cmd: NVRAM command
 209  *
 210  * Bit definitions for NVRAM command:
 211  *
 212  *      Bit 26     = start bit
 213  *      Bit 25, 24 = opcode
 214  *      Bit 23-16  = address
 215  *      Bit 15-0   = write data
 216  *
 217  * Returns the word read from nvram @addr.
 218  */
 219 static uint16_t
 220 qla2x00_nvram_request(scsi_qla_host_t *ha, uint32_t nv_cmd)
 221 {
 222         uint8_t         cnt;
 223         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 224         uint16_t        data = 0;
 225         uint16_t        reg_data;
 226
 227         /* Send command to NVRAM. */
 228         nv_cmd <<= 5;
 229         for (cnt = 0; cnt < 11; cnt++) {
 230                 if (nv_cmd & BIT_31)
 231                         qla2x00_nv_write(ha, NVR_DATA_OUT);
 232                 else
 233                         qla2x00_nv_write(ha, 0);
 234                 nv_cmd <<= 1;
 235         }
 236
 237         /* Read data from NVRAM. */
 238         for (cnt = 0; cnt < 16; cnt++) {
 239                 WRT_REG_WORD(&reg->nvram, NVR_SELECT | NVR_CLOCK);
 240                 RD_REG_WORD(&reg->nvram);       /* PCI Posting. */
 241                 NVRAM_DELAY();
 242                 data <<= 1;
 243                 reg_data = RD_REG_WORD(&reg->nvram);
 244                 if (reg_data & NVR_DATA_IN)
 245                         data |= BIT_0;
 246                 WRT_REG_WORD(&reg->nvram, NVR_SELECT);
 247                 RD_REG_WORD(&reg->nvram);       /* PCI Posting. */
 248                 NVRAM_DELAY();
 249         }
 250
 251         /* Deselect chip. */
 252         WRT_REG_WORD(&reg->nvram, NVR_DESELECT);
 253         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 254         NVRAM_DELAY();
 255
 256         return (data);
 257 }
 258
 259 /**
 260  * qla2x00_nv_write() - Clean NVRAM operations.
 261  * @ha: HA context
 262  */
 263 static void
 264 qla2x00_nv_deselect(scsi_qla_host_t *ha)
 265 {
 266         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 267
 268         WRT_REG_WORD(&reg->nvram, NVR_DESELECT);
 269         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 270         NVRAM_DELAY();
 271 }
 272
 273 /**
 274  * qla2x00_nv_write() - Prepare for NVRAM read/write operation.
 275  * @ha: HA context
 276  * @data: Serial interface selector
 277  */
 278 static void
 279 qla2x00_nv_write(scsi_qla_host_t *ha, uint16_t data)
 280 {
 281         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 282
 283         WRT_REG_WORD(&reg->nvram, data | NVR_SELECT | NVR_WRT_ENABLE);
 284         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 285         NVRAM_DELAY();
 286         WRT_REG_WORD(&reg->nvram, data | NVR_SELECT| NVR_CLOCK |
 287             NVR_WRT_ENABLE);
 288         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 289         NVRAM_DELAY();
 290         WRT_REG_WORD(&reg->nvram, data | NVR_SELECT | NVR_WRT_ENABLE);
 291         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 292         NVRAM_DELAY();
 293 }
 294
 295 /**
 296  * qla2x00_clear_nvram_protection() -
 297  * @ha: HA context
 298  */
 299 static int
 300 qla2x00_clear_nvram_protection(scsi_qla_host_t *ha)
 301 {
 302         int ret, stat;
 303         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 304         uint32_t word;
 305         uint16_t wprot, wprot_old;
 306
 307         /* Clear NVRAM write protection. */
 308         ret = QLA_FUNCTION_FAILED;
 309         wprot_old = cpu_to_le16(qla2x00_get_nvram_word(ha, 0));
 310         stat = qla2x00_write_nvram_word_tmo(ha, 0,
 311             __constant_cpu_to_le16(0x1234), 100000);
 312         wprot = cpu_to_le16(qla2x00_get_nvram_word(ha, 0));
 313         if (stat != QLA_SUCCESS || wprot != __constant_cpu_to_le16(0x1234)) {
 314                 /* Write enable. */
 315                 qla2x00_nv_write(ha, NVR_DATA_OUT);
 316                 qla2x00_nv_write(ha, 0);
 317                 qla2x00_nv_write(ha, 0);
 318                 for (word = 0; word < 8; word++)
 319                         qla2x00_nv_write(ha, NVR_DATA_OUT);
 320
 321                 qla2x00_nv_deselect(ha);
 322
 323                 /* Enable protection register. */
 324                 qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 325                 qla2x00_nv_write(ha, NVR_PR_ENABLE);
 326                 qla2x00_nv_write(ha, NVR_PR_ENABLE);
 327                 for (word = 0; word < 8; word++)
 328                         qla2x00_nv_write(ha, NVR_DATA_OUT | NVR_PR_ENABLE);
 329
 330                 qla2x00_nv_deselect(ha);
 331
 332                 /* Clear protection register (ffff is cleared). */
 333                 qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 334                 qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 335                 qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 336                 for (word = 0; word < 8; word++)
 337                         qla2x00_nv_write(ha, NVR_DATA_OUT | NVR_PR_ENABLE);
 338
 339                 qla2x00_nv_deselect(ha);
 340
 341                 /* Wait for NVRAM to become ready. */
 342                 WRT_REG_WORD(&reg->nvram, NVR_SELECT);
 343                 RD_REG_WORD(&reg->nvram);       /* PCI Posting. */
 344                 do {
 345                         NVRAM_DELAY();
 346                         word = RD_REG_WORD(&reg->nvram);
 347                 } while ((word & NVR_DATA_IN) == 0);
 348
 349                 ret = QLA_SUCCESS;
 350         } else
 351                 qla2x00_write_nvram_word(ha, 0, wprot_old);
 352
 353         return ret;
 354 }
 355
 356 static void
 357 qla2x00_set_nvram_protection(scsi_qla_host_t *ha, int stat)
 358 {
 359         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 360         uint32_t word;
 361
 362         if (stat != QLA_SUCCESS)
 363                 return;
 364
 365         /* Set NVRAM write protection. */
 366         /* Write enable. */
 367         qla2x00_nv_write(ha, NVR_DATA_OUT);
 368         qla2x00_nv_write(ha, 0);
 369         qla2x00_nv_write(ha, 0);
 370         for (word = 0; word < 8; word++)
 371                 qla2x00_nv_write(ha, NVR_DATA_OUT);
 372
 373         qla2x00_nv_deselect(ha);
 374
 375         /* Enable protection register. */
 376         qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 377         qla2x00_nv_write(ha, NVR_PR_ENABLE);
 378         qla2x00_nv_write(ha, NVR_PR_ENABLE);
 379         for (word = 0; word < 8; word++)
 380                 qla2x00_nv_write(ha, NVR_DATA_OUT | NVR_PR_ENABLE);
 381
 382         qla2x00_nv_deselect(ha);
 383
 384         /* Enable protection register. */
 385         qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 386         qla2x00_nv_write(ha, NVR_PR_ENABLE);
 387         qla2x00_nv_write(ha, NVR_PR_ENABLE | NVR_DATA_OUT);
 388         for (word = 0; word < 8; word++)
 389                 qla2x00_nv_write(ha, NVR_PR_ENABLE);
 390
 391         qla2x00_nv_deselect(ha);
 392
 393         /* Wait for NVRAM to become ready. */
 394         WRT_REG_WORD(&reg->nvram, NVR_SELECT);
 395         RD_REG_WORD(&reg->nvram);               /* PCI Posting. */
 396         do {
 397                 NVRAM_DELAY();
 398                 word = RD_REG_WORD(&reg->nvram);
 399         } while ((word & NVR_DATA_IN) == 0);
 400 }
 401
 402
 403 /*****************************************************************************/
 404 /* Flash Manipulation Routines                                               */
 405 /*****************************************************************************/
 406
 407 static inline uint32_t
 408 flash_conf_to_access_addr(uint32_t faddr)
 409 {
 410         return FARX_ACCESS_FLASH_CONF | faddr;
 411 }
 412
 413 static inline uint32_t
 414 flash_data_to_access_addr(uint32_t faddr)
 415 {
 416         return FARX_ACCESS_FLASH_DATA | faddr;
 417 }
 418
 419 static inline uint32_t
 420 nvram_conf_to_access_addr(uint32_t naddr)
 421 {
 422         return FARX_ACCESS_NVRAM_CONF | naddr;
 423 }
 424
 425 static inline uint32_t
 426 nvram_data_to_access_addr(uint32_t naddr)
 427 {
 428         return FARX_ACCESS_NVRAM_DATA | naddr;
 429 }
 430
 431 uint32_t
 432 qla24xx_read_flash_dword(scsi_qla_host_t *ha, uint32_t addr)
 433 {
 434         int rval;
 435         uint32_t cnt, data;
 436         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 437
 438         WRT_REG_DWORD(&reg->flash_addr, addr & ~FARX_DATA_FLAG);
 439         /* Wait for READ cycle to complete. */
 440         rval = QLA_SUCCESS;
 441         for (cnt = 3000;
 442             (RD_REG_DWORD(&reg->flash_addr) & FARX_DATA_FLAG) == 0 &&
 443             rval == QLA_SUCCESS; cnt--) {
 444                 if (cnt)
 445                         udelay(10);
 446                 else
 447                         rval = QLA_FUNCTION_TIMEOUT;
 448         }
 449
 450         /* TODO: What happens if we time out? */
 451         data = 0xDEADDEAD;
 452         if (rval == QLA_SUCCESS)
 453                 data = RD_REG_DWORD(&reg->flash_data);
 454
 455         return data;
 456 }
 457
 458 uint32_t *
 459 qla24xx_read_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
 460     uint32_t dwords)
 461 {
 462         uint32_t i;
 463
 464         /* Dword reads to flash. */
 465         for (i = 0; i < dwords; i++, faddr++)
 466                 dwptr[i] = cpu_to_le32(qla24xx_read_flash_dword(ha,
 467                     flash_data_to_access_addr(faddr)));
 468
 469         return dwptr;
 470 }
 471
 472 int
 473 qla24xx_write_flash_dword(scsi_qla_host_t *ha, uint32_t addr, uint32_t data)
 474 {
 475         int rval;
 476         uint32_t cnt;
 477         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 478
 479         WRT_REG_DWORD(&reg->flash_data, data);
 480         RD_REG_DWORD(&reg->flash_data);         /* PCI Posting. */
 481         WRT_REG_DWORD(&reg->flash_addr, addr | FARX_DATA_FLAG);
 482         /* Wait for Write cycle to complete. */
 483         rval = QLA_SUCCESS;
 484         for (cnt = 500000; (RD_REG_DWORD(&reg->flash_addr) & FARX_DATA_FLAG) &&
 485             rval == QLA_SUCCESS; cnt--) {
 486                 if (cnt)
 487                         udelay(10);
 488                 else
 489                         rval = QLA_FUNCTION_TIMEOUT;
 490         }
 491         return rval;
 492 }
 493
 494 void
 495 qla24xx_get_flash_manufacturer(scsi_qla_host_t *ha, uint8_t *man_id,
 496     uint8_t *flash_id)
 497 {
 498         uint32_t ids;
 499
 500         ids = qla24xx_read_flash_dword(ha, flash_data_to_access_addr(0xd03ab));
 501         *man_id = LSB(ids);
 502         *flash_id = MSB(ids);
 503 }
 504
 505 int
 506 qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
 507     uint32_t dwords)
 508 {
 509         int ret;
 510         uint32_t liter;
 511         uint32_t sec_mask, rest_addr, conf_addr;
 512         uint32_t fdata;
 513         uint8_t man_id, flash_id;
 514         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 515
 516         ret = QLA_SUCCESS;
 517
 518         qla24xx_get_flash_manufacturer(ha, &man_id, &flash_id);
 519         DEBUG9(printk("%s(%ld): Flash man_id=%d flash_id=%d\n", __func__,
 520             ha->host_no, man_id, flash_id));
 521
 522         conf_addr = flash_conf_to_access_addr(0x03d8);
 523         switch (man_id) {
 524         case 0xbf: /* STT flash. */
 525                 rest_addr = 0x1fff;
 526                 sec_mask = 0x3e000;
 527                 if (flash_id == 0x80)
 528                         conf_addr = flash_conf_to_access_addr(0x0352);
 529                 break;
 530         case 0x13: /* ST M25P80. */
 531                 rest_addr = 0x3fff;
 532                 sec_mask = 0x3c000;
 533                 break;
 534         default:
 535                 /* Default to 64 kb sector size. */
 536                 rest_addr = 0x3fff;
 537                 sec_mask = 0x3c000;
 538                 break;
 539         }
 540
 541         /* Enable flash write. */
 542         WRT_REG_DWORD(&reg->ctrl_status,
 543             RD_REG_DWORD(&reg->ctrl_status) | CSRX_FLASH_ENABLE);
 544         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 545
 546         /* Disable flash write-protection. */
 547         qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0);
 548
 549         do {    /* Loop once to provide quick error exit. */
 550                 for (liter = 0; liter < dwords; liter++, faddr++, dwptr++) {
 551                         /* Are we at the beginning of a sector? */
 552                         if ((faddr & rest_addr) == 0) {
 553                                 fdata = (faddr & sec_mask) << 2;
 554                                 ret = qla24xx_write_flash_dword(ha, conf_addr,
 555                                     (fdata & 0xff00) |((fdata << 16) &
 556                                     0xff0000) | ((fdata >> 16) & 0xff));
 557                                 if (ret != QLA_SUCCESS) {
 558                                         DEBUG9(printk("%s(%ld) Unable to flash "
 559                                             "sector: address=%x.\n", __func__,
 560                                             ha->host_no, faddr));
 561                                         break;
 562                                 }
 563                         }
 564                         ret = qla24xx_write_flash_dword(ha,
 565                             flash_data_to_access_addr(faddr),
 566                             cpu_to_le32(*dwptr));
 567                         if (ret != QLA_SUCCESS) {
 568                                 DEBUG9(printk("%s(%ld) Unable to program flash "
 569                                     "address=%x data=%x.\n", __func__,
 570                                     ha->host_no, faddr, *dwptr));
 571                                 break;
 572                         }
 573                 }
 574         } while (0);
 575
 576         /* Enable flash write-protection. */
 577         qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0x9c);
 578
 579         /* Disable flash write. */
 580         WRT_REG_DWORD(&reg->ctrl_status,
 581             RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
 582         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 583
 584         return ret;
 585 }
 586
 587 uint8_t *
 588 qla2x00_read_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
 589     uint32_t bytes)
 590 {
 591         uint32_t i;
 592         uint16_t *wptr;
 593
 594         /* Word reads to NVRAM via registers. */
 595         wptr = (uint16_t *)buf;
 596         qla2x00_lock_nvram_access(ha);
 597         for (i = 0; i < bytes >> 1; i++, naddr++)
 598                 wptr[i] = cpu_to_le16(qla2x00_get_nvram_word(ha,
 599                     naddr));
 600         qla2x00_unlock_nvram_access(ha);
 601
 602         return buf;
 603 }
 604
 605 uint8_t *
 606 qla24xx_read_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
 607     uint32_t bytes)
 608 {
 609         uint32_t i;
 610         uint32_t *dwptr;
 611
 612         /* Dword reads to flash. */
 613         dwptr = (uint32_t *)buf;
 614         for (i = 0; i < bytes >> 2; i++, naddr++)
 615                 dwptr[i] = cpu_to_le32(qla24xx_read_flash_dword(ha,
 616                     nvram_data_to_access_addr(naddr)));
 617
 618         return buf;
 619 }
 620
 621 int
 622 qla2x00_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
 623     uint32_t bytes)
 624 {
 625         int ret, stat;
 626         uint32_t i;
 627         uint16_t *wptr;
 628
 629         ret = QLA_SUCCESS;
 630
 631         qla2x00_lock_nvram_access(ha);
 632
 633         /* Disable NVRAM write-protection. */
 634         stat = qla2x00_clear_nvram_protection(ha);
 635
 636         wptr = (uint16_t *)buf;
 637         for (i = 0; i < bytes >> 1; i++, naddr++) {
 638                 qla2x00_write_nvram_word(ha, naddr,
 639                     cpu_to_le16(*wptr));
 640                 wptr++;
 641         }
 642
 643         /* Enable NVRAM write-protection. */
 644         qla2x00_set_nvram_protection(ha, stat);
 645
 646         qla2x00_unlock_nvram_access(ha);
 647
 648         return ret;
 649 }
 650
 651 int
 652 qla24xx_write_nvram_data(scsi_qla_host_t *ha, uint8_t *buf, uint32_t naddr,
 653     uint32_t bytes)
 654 {
 655         int ret;
 656         uint32_t i;
 657         uint32_t *dwptr;
 658         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 659
 660         ret = QLA_SUCCESS;
 661
 662         /* Enable flash write. */
 663         WRT_REG_DWORD(&reg->ctrl_status,
 664             RD_REG_DWORD(&reg->ctrl_status) | CSRX_FLASH_ENABLE);
 665         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 666
 667         /* Disable NVRAM write-protection. */
 668         qla24xx_write_flash_dword(ha, nvram_conf_to_access_addr(0x101),
 669             0);
 670         qla24xx_write_flash_dword(ha, nvram_conf_to_access_addr(0x101),
 671             0);
 672
 673         /* Dword writes to flash. */
 674         dwptr = (uint32_t *)buf;
 675         for (i = 0; i < bytes >> 2; i++, naddr++, dwptr++) {
 676                 ret = qla24xx_write_flash_dword(ha,
 677                     nvram_data_to_access_addr(naddr),
 678                     cpu_to_le32(*dwptr));
 679                 if (ret != QLA_SUCCESS) {
 680                         DEBUG9(printk("%s(%ld) Unable to program "
 681                             "nvram address=%x data=%x.\n", __func__,
 682                             ha->host_no, naddr, *dwptr));
 683                         break;
 684                 }
 685         }
 686
 687         /* Enable NVRAM write-protection. */
 688         qla24xx_write_flash_dword(ha, nvram_conf_to_access_addr(0x101),
 689             0x8c);
 690
 691         /* Disable flash write. */
 692         WRT_REG_DWORD(&reg->ctrl_status,
 693             RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
 694         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 695
 696         return ret;
 697 }