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_WREN       0x06    /* Write Enable */
  15 #define CMD_EN25Q128_WRDI       0x04    /* Write Disable */
  16 #define CMD_EN25Q128_RDSR       0x05    /* Read Status Register */
  17 #define CMD_EN25Q128_WRSR       0x01    /* Write Status Register */
  18 #define CMD_EN25Q128_READ       0x03    /* Read Data Bytes */
  19 #define CMD_EN25Q128_FAST_READ  0x0b    /* Read Data Bytes at Higher Speed */
  20 #define CMD_EN25Q128_PP         0x02    /* Page Program */
  21 #define CMD_EN25Q128_SE         0x20    /* Sector Erase */
  22 #define CMD_EN25Q128_BE         0xd8    /* Block Erase */
  23 #define CMD_EN25Q128_DP         0xb9    /* Deep Power-down */
  24 #define CMD_EN25Q128_RES        0xab    /* Release from DP, and Read Signature */
  25
  26 struct eon_spi_flash_params {
  27         u8 idcode1;
  28         u16 page_size;
  29         u16 pages_per_sector;
  30         u16 sectors_per_block;
  31         u16 nr_sectors;
  32         const char *name;
  33 };
  34
  35 static const struct eon_spi_flash_params eon_spi_flash_table[] = {
  36         {
  37                 .idcode1 = 0x18,
  38                 .page_size = 256,
  39                 .pages_per_sector = 16,
  40                 .sectors_per_block = 16,
  41                 .nr_sectors = 4096,
  42                 .name = "EN25Q128",
  43         },
  44 };
  45
  46 static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
  47 {
  48         return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
  49 }
  50
  51 struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
  52 {
  53         const struct eon_spi_flash_params *params;
  54         struct spi_flash *flash;
  55         unsigned int i;
  56
  57         for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
  58                 params = &eon_spi_flash_table[i];
  59                 if (params->idcode1 == idcode[2])
  60                         break;
  61         }
  62
  63         if (i == ARRAY_SIZE(eon_spi_flash_table)) {
  64                 debug("SF: Unsupported EON ID %02x\n", idcode[1]);
  65                 return NULL;
  66         }
  67
  68         flash = malloc(sizeof(*flash));
  69         if (!flash) {
  70                 debug("SF: Failed to allocate memory\n");
  71                 return NULL;
  72         }
  73
  74         flash->spi = spi;
  75         flash->name = params->name;
  76
  77         flash->write = spi_flash_cmd_write_multi;
  78         flash->erase = eon_erase;
  79         flash->read = spi_flash_cmd_read_fast;
  80         flash->page_size = params->page_size;
  81         flash->sector_size = params->page_size * params->pages_per_sector
  82             * params->sectors_per_block;
  83         flash->size = params->page_size * params->pages_per_sector
  84             * params->nr_sectors;
  85
  86         return flash;
  87 }