drivers/mtd/spi/winbond.c

   1 /*
   2  * Copyright 2008, Network Appliance Inc.
   3  * Author: Jason McMullan <mcmullan <at> netapp.com>
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #include <common.h>
   8 #include <malloc.h>
   9 #include <spi_flash.h>
  10
  11 #include "spi_flash_internal.h"
  12
  13 /* M25Pxx-specific commands */
  14 #define CMD_W25_SE              0x20    /* Sector (4K) Erase */
  15 #define CMD_W25_BE              0xd8    /* Block (64K) Erase */
  16 #define CMD_W25_CE              0xc7    /* Chip Erase */
  17
  18 struct winbond_spi_flash_params {
  19         uint16_t        id;
  20         uint16_t        nr_blocks;
  21         const char      *name;
  22 };
  23
  24 static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
  25         {
  26                 .id                     = 0x3013,
  27                 .nr_blocks              = 8,
  28                 .name                   = "W25X40",
  29         },
  30         {
  31                 .id                     = 0x3015,
  32                 .nr_blocks              = 32,
  33                 .name                   = "W25X16",
  34         },
  35         {
  36                 .id                     = 0x3016,
  37                 .nr_blocks              = 64,
  38                 .name                   = "W25X32",
  39         },
  40         {
  41                 .id                     = 0x3017,
  42                 .nr_blocks              = 128,
  43                 .name                   = "W25X64",
  44         },
  45         {
  46                 .id                     = 0x4014,
  47                 .nr_blocks              = 16,
  48                 .name                   = "W25Q80BL",
  49         },
  50         {
  51                 .id                     = 0x4015,
  52                 .nr_blocks              = 32,
  53                 .name                   = "W25Q16",
  54         },
  55         {
  56                 .id                     = 0x4016,
  57                 .nr_blocks              = 64,
  58                 .name                   = "W25Q32",
  59         },
  60         {
  61                 .id                     = 0x4017,
  62                 .nr_blocks              = 128,
  63                 .name                   = "W25Q64",
  64         },
  65         {
  66                 .id                     = 0x4018,
  67                 .nr_blocks              = 256,
  68                 .name                   = "W25Q128",
  69         },
  70 };
  71
  72 static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
  73 {
  74         return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
  75 }
  76
  77 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
  78 {
  79         const struct winbond_spi_flash_params *params;
  80         struct spi_flash *flash;
  81         unsigned int i;
  82
  83         for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
  84                 params = &winbond_spi_flash_table[i];
  85                 if (params->id == ((idcode[1] << 8) | idcode[2]))
  86                         break;
  87         }
  88
  89         if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
  90                 debug("SF: Unsupported Winbond ID %02x%02x\n",
  91                                 idcode[1], idcode[2]);
  92                 return NULL;
  93         }
  94
  95         flash = malloc(sizeof(*flash));
  96         if (!flash) {
  97                 debug("SF: Failed to allocate memory\n");
  98                 return NULL;
  99         }
 100
 101         flash->spi = spi;
 102         flash->name = params->name;
 103
 104         flash->write = spi_flash_cmd_write_multi;
 105         flash->erase = winbond_erase;
 106         flash->read = spi_flash_cmd_read_fast;
 107         flash->page_size = 4096;
 108         flash->sector_size = 4096;
 109         flash->size = 4096 * 16 * params->nr_blocks;
 110
 111         return flash;
 112 }