LXR uboot/drivers/mtd/spi/stmicro.c

   1/*
   2 * (C) Copyright 2000-2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * Copyright 2008, Network Appliance Inc.
   6 * Jason McMullan <mcmullan@netapp.com>
   7 *
   8 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
   9 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  10 *
  11 * See file CREDITS for list of people who contributed to this
  12 * project.
  13 *
  14 * This program is free software; you can redistribute it and/or
  15 * modify it under the terms of the GNU General Public License as
  16 * published by the Free Software Foundation; either version 2 of
  17 * the License, or (at your option) any later version.
  18 *
  19 * This program is distributed in the hope that it will be useful,
  20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 * GNU General Public License for more details.
  23 *
  24 * You should have received a copy of the GNU General Public License
  25 * along with this program; if not, write to the Free Software
  26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27 * MA 02111-1307 USA
  28 */
  29
  30#include <common.h>
  31#include <malloc.h>
  32#include <spi_flash.h>
  33
  34#include "spi_flash_internal.h"
  35
  36/* M25Pxx-specific commands */
  37#define CMD_M25PXX_WREN         0x06    /* Write Enable */
  38#define CMD_M25PXX_WRDI         0x04    /* Write Disable */
  39#define CMD_M25PXX_RDSR         0x05    /* Read Status Register */
  40#define CMD_M25PXX_WRSR         0x01    /* Write Status Register */
  41#define CMD_M25PXX_READ         0x03    /* Read Data Bytes */
  42#define CMD_M25PXX_FAST_READ    0x0b    /* Read Data Bytes at Higher Speed */
  43#define CMD_M25PXX_PP           0x02    /* Page Program */
  44#define CMD_M25PXX_SE           0xd8    /* Sector Erase */
  45#define CMD_M25PXX_BE           0xc7    /* Bulk Erase */
  46#define CMD_M25PXX_DP           0xb9    /* Deep Power-down */
  47#define CMD_M25PXX_RES          0xab    /* Release from DP, and Read Signature */
  48
  49struct stmicro_spi_flash_params {
  50        u8 idcode1;
  51        u16 page_size;
  52        u16 pages_per_sector;
  53        u16 nr_sectors;
  54        const char *name;
  55};
  56
  57static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
  58        {
  59                .idcode1 = 0x11,
  60                .page_size = 256,
  61                .pages_per_sector = 128,
  62                .nr_sectors = 4,
  63                .name = "M25P10",
  64        },
  65        {
  66                .idcode1 = 0x15,
  67                .page_size = 256,
  68                .pages_per_sector = 256,
  69                .nr_sectors = 32,
  70                .name = "M25P16",
  71        },
  72        {
  73                .idcode1 = 0x12,
  74                .page_size = 256,
  75                .pages_per_sector = 256,
  76                .nr_sectors = 4,
  77                .name = "M25P20",
  78        },
  79        {
  80                .idcode1 = 0x16,
  81                .page_size = 256,
  82                .pages_per_sector = 256,
  83                .nr_sectors = 64,
  84                .name = "M25P32",
  85        },
  86        {
  87                .idcode1 = 0x13,
  88                .page_size = 256,
  89                .pages_per_sector = 256,
  90                .nr_sectors = 8,
  91                .name = "M25P40",
  92        },
  93        {
  94                .idcode1 = 0x17,
  95                .page_size = 256,
  96                .pages_per_sector = 256,
  97                .nr_sectors = 128,
  98                .name = "M25P64",
  99        },
 100        {
 101                .idcode1 = 0x14,
 102                .page_size = 256,
 103                .pages_per_sector = 256,
 104                .nr_sectors = 16,
 105                .name = "M25P80",
 106        },
 107        {
 108                .idcode1 = 0x18,
 109                .page_size = 256,
 110                .pages_per_sector = 1024,
 111                .nr_sectors = 64,
 112                .name = "M25P128",
 113        },
 114};
 115
 116static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
 117{
 118        return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
 119}
 120
 121struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 122{
 123        const struct stmicro_spi_flash_params *params;
 124        struct spi_flash *flash;
 125        unsigned int i;
 126
 127        if (idcode[0] == 0xff) {
 128                i = spi_flash_cmd(spi, CMD_M25PXX_RES,
 129                                  idcode, 4);
 130                if (i)
 131                        return NULL;
 132                if ((idcode[3] & 0xf0) == 0x10) {
 133                        idcode[0] = 0x20;
 134                        idcode[1] = 0x20;
 135                        idcode[2] = idcode[3] + 1;
 136                } else
 137                        return NULL;
 138        }
 139
 140        for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
 141                params = &stmicro_spi_flash_table[i];
 142                if (params->idcode1 == idcode[2]) {
 143                        break;
 144                }
 145        }
 146
 147        if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
 148                debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
 149                return NULL;
 150        }
 151
 152        flash = malloc(sizeof(*flash));
 153        if (!flash) {
 154                debug("SF: Failed to allocate memory\n");
 155                return NULL;
 156        }
 157
 158        flash->spi = spi;
 159        flash->name = params->name;
 160
 161        flash->write = spi_flash_cmd_write_multi;
 162        flash->erase = stmicro_erase;
 163        flash->read = spi_flash_cmd_read_fast;
 164        flash->page_size = params->page_size;
 165        flash->sector_size = params->page_size * params->pages_per_sector;
 166        flash->size = flash->sector_size * params->nr_sectors;
 167
 168        return flash;
 169}
 170