git.sur5r.net Git - u-boot/blob - drivers/mtd/spi/eon.c

   1 /*
   2  * (C) Copyright 2010, ucRobotics Inc.
   3  * Author: Chong Huang <chuang@ucrobotics.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 /* EN25Q128-specific commands */
  14 #define CMD_EN25Q128_SE         0x20    /* Sector Erase */
  15 #define CMD_EN25Q128_BE         0xd8    /* Block Erase */
  16
  17 struct eon_spi_flash_params {
  18         u8 idcode1;
  19         u16 page_size;
  20         u16 pages_per_sector;
  21         u16 sectors_per_block;
  22         u16 nr_sectors;
  23         const char *name;
  24 };
  25
  26 static const struct eon_spi_flash_params eon_spi_flash_table[] = {
  27         {
  28                 .idcode1 = 0x16,
  29                 .page_size = 256,
  30                 .pages_per_sector = 16,
  31                 .sectors_per_block = 16,
  32                 .nr_sectors = 1024,
  33                 .name = "EN25Q32B",
  34         },
  35         {
  36                 .idcode1 = 0x18,
  37                 .page_size = 256,
  38                 .pages_per_sector = 16,
  39                 .sectors_per_block = 16,
  40                 .nr_sectors = 4096,
  41                 .name = "EN25Q128",
  42         },
  43         {
  44                 .idcode1 = 0x16,
  45                 .page_size = 256,
  46                 .pages_per_sector = 16,
  47                 .sectors_per_block = 16,
  48                 .nr_sectors = 1024,
  49                 .name = "EN25Q32B",
  50         },
  51 };
  52
  53 static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
  54 {
  55         return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
  56 }
  57
  58 struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
  59 {
  60         const struct eon_spi_flash_params *params;
  61         struct spi_flash *flash;
  62         unsigned int i;
  63
  64         for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
  65                 params = &eon_spi_flash_table[i];
  66                 if (params->idcode1 == idcode[2])
  67                         break;
  68         }
  69
  70         if (i == ARRAY_SIZE(eon_spi_flash_table)) {
  71                 debug("SF: Unsupported EON ID %02x\n", idcode[1]);
  72                 return NULL;
  73         }
  74
  75         flash = malloc(sizeof(*flash));
  76         if (!flash) {
  77                 debug("SF: Failed to allocate memory\n");
  78                 return NULL;
  79         }
  80
  81         flash->spi = spi;
  82         flash->name = params->name;
  83
  84         flash->write = spi_flash_cmd_write_multi;
  85         flash->erase = eon_erase;
  86         flash->read = spi_flash_cmd_read_fast;
  87         flash->page_size = params->page_size;
  88         flash->sector_size = params->page_size * params->pages_per_sector
  89             * params->sectors_per_block;
  90         flash->size = params->page_size * params->pages_per_sector
  91             * params->nr_sectors;
  92
  93         return flash;
  94 }