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         /* Log2 of page size in power-of-two mode */
  21         uint8_t         l2_page_size;
  22         uint16_t        pages_per_sector;
  23         uint16_t        sectors_per_block;
  24         uint16_t        nr_blocks;
  25         const char      *name;
  26 };
  27
  28 static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
  29         {
  30                 .id                     = 0x3013,
  31                 .l2_page_size           = 8,
  32                 .pages_per_sector       = 16,
  33                 .sectors_per_block      = 16,
  34                 .nr_blocks              = 8,
  35                 .name                   = "W25X40",
  36         },
  37         {
  38                 .id                     = 0x3015,
  39                 .l2_page_size           = 8,
  40                 .pages_per_sector       = 16,
  41                 .sectors_per_block      = 16,
  42                 .nr_blocks              = 32,
  43                 .name                   = "W25X16",
  44         },
  45         {
  46                 .id                     = 0x3016,
  47                 .l2_page_size           = 8,
  48                 .pages_per_sector       = 16,
  49                 .sectors_per_block      = 16,
  50                 .nr_blocks              = 64,
  51                 .name                   = "W25X32",
  52         },
  53         {
  54                 .id                     = 0x3017,
  55                 .l2_page_size           = 8,
  56                 .pages_per_sector       = 16,
  57                 .sectors_per_block      = 16,
  58                 .nr_blocks              = 128,
  59                 .name                   = "W25X64",
  60         },
  61         {
  62                 .id                     = 0x4014,
  63                 .l2_page_size           = 8,
  64                 .pages_per_sector       = 16,
  65                 .sectors_per_block      = 16,
  66                 .nr_blocks              = 16,
  67                 .name                   = "W25Q80BL",
  68         },
  69         {
  70                 .id                     = 0x4015,
  71                 .l2_page_size           = 8,
  72                 .pages_per_sector       = 16,
  73                 .sectors_per_block      = 16,
  74                 .nr_blocks              = 32,
  75                 .name                   = "W25Q16",
  76         },
  77         {
  78                 .id                     = 0x4016,
  79                 .l2_page_size           = 8,
  80                 .pages_per_sector       = 16,
  81                 .sectors_per_block      = 16,
  82                 .nr_blocks              = 64,
  83                 .name                   = "W25Q32",
  84         },
  85         {
  86                 .id                     = 0x4017,
  87                 .l2_page_size           = 8,
  88                 .pages_per_sector       = 16,
  89                 .sectors_per_block      = 16,
  90                 .nr_blocks              = 128,
  91                 .name                   = "W25Q64",
  92         },
  93         {
  94                 .id                     = 0x4018,
  95                 .l2_page_size           = 8,
  96                 .pages_per_sector       = 16,
  97                 .sectors_per_block      = 16,
  98                 .nr_blocks              = 256,
  99                 .name                   = "W25Q128",
 100         },
 101 };
 102
 103 static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
 104 {
 105         return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
 106 }
 107
 108 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
 109 {
 110         const struct winbond_spi_flash_params *params;
 111         struct spi_flash *flash;
 112         unsigned int i;
 113         unsigned page_size;
 114
 115         for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
 116                 params = &winbond_spi_flash_table[i];
 117                 if (params->id == ((idcode[1] << 8) | idcode[2]))
 118                         break;
 119         }
 120
 121         if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
 122                 debug("SF: Unsupported Winbond ID %02x%02x\n",
 123                                 idcode[1], idcode[2]);
 124                 return NULL;
 125         }
 126
 127         flash = malloc(sizeof(*flash));
 128         if (!flash) {
 129                 debug("SF: Failed to allocate memory\n");
 130                 return NULL;
 131         }
 132
 133         flash->spi = spi;
 134         flash->name = params->name;
 135
 136         /* Assuming power-of-two page size initially. */
 137         page_size = 1 << params->l2_page_size;
 138
 139         flash->write = spi_flash_cmd_write_multi;
 140         flash->erase = winbond_erase;
 141         flash->read = spi_flash_cmd_read_fast;
 142         flash->page_size = page_size;
 143         flash->sector_size = page_size * params->pages_per_sector;
 144         flash->size = page_size * params->pages_per_sector
 145                                 * params->sectors_per_block
 146                                 * params->nr_blocks;
 147
 148         return flash;
 149 }