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_SE           0xd8    /* Sector Erase */
  38 #define CMD_M25PXX_BE           0xc7    /* Bulk Erase */
  39 #define CMD_M25PXX_RES          0xab    /* Release from DP, and Read Signature */
  40
  41 struct stmicro_spi_flash_params {
  42         u8 idcode1;
  43         u16 pages_per_sector;
  44         u16 nr_sectors;
  45         const char *name;
  46 };
  47
  48 static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
  49         {
  50                 .idcode1 = 0x11,
  51                 .pages_per_sector = 128,
  52                 .nr_sectors = 4,
  53                 .name = "M25P10",
  54         },
  55         {
  56                 .idcode1 = 0x15,
  57                 .pages_per_sector = 256,
  58                 .nr_sectors = 32,
  59                 .name = "M25P16",
  60         },
  61         {
  62                 .idcode1 = 0x12,
  63                 .pages_per_sector = 256,
  64                 .nr_sectors = 4,
  65                 .name = "M25P20",
  66         },
  67         {
  68                 .idcode1 = 0x16,
  69                 .pages_per_sector = 256,
  70                 .nr_sectors = 64,
  71                 .name = "M25P32",
  72         },
  73         {
  74                 .idcode1 = 0x13,
  75                 .pages_per_sector = 256,
  76                 .nr_sectors = 8,
  77                 .name = "M25P40",
  78         },
  79         {
  80                 .idcode1 = 0x17,
  81                 .pages_per_sector = 256,
  82                 .nr_sectors = 128,
  83                 .name = "M25P64",
  84         },
  85         {
  86                 .idcode1 = 0x14,
  87                 .pages_per_sector = 256,
  88                 .nr_sectors = 16,
  89                 .name = "M25P80",
  90         },
  91         {
  92                 .idcode1 = 0x18,
  93                 .pages_per_sector = 1024,
  94                 .nr_sectors = 64,
  95                 .name = "M25P128",
  96         },
  97 };
  98
  99 static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
 100 {
 101         return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
 102 }
 103
 104 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 105 {
 106         const struct stmicro_spi_flash_params *params;
 107         struct spi_flash *flash;
 108         unsigned int i;
 109
 110         if (idcode[0] == 0xff) {
 111                 i = spi_flash_cmd(spi, CMD_M25PXX_RES,
 112                                   idcode, 4);
 113                 if (i)
 114                         return NULL;
 115                 if ((idcode[3] & 0xf0) == 0x10) {
 116                         idcode[0] = 0x20;
 117                         idcode[1] = 0x20;
 118                         idcode[2] = idcode[3] + 1;
 119                 } else
 120                         return NULL;
 121         }
 122
 123         for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
 124                 params = &stmicro_spi_flash_table[i];
 125                 if (params->idcode1 == idcode[2]) {
 126                         break;
 127                 }
 128         }
 129
 130         if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
 131                 debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
 132                 return NULL;
 133         }
 134
 135         flash = malloc(sizeof(*flash));
 136         if (!flash) {
 137                 debug("SF: Failed to allocate memory\n");
 138                 return NULL;
 139         }
 140
 141         flash->spi = spi;
 142         flash->name = params->name;
 143
 144         flash->write = spi_flash_cmd_write_multi;
 145         flash->erase = stmicro_erase;
 146         flash->read = spi_flash_cmd_read_fast;
 147         flash->page_size = 256;
 148         flash->sector_size = 256 * params->pages_per_sector;
 149         flash->size = flash->sector_size * params->nr_sectors;
 150
 151         return flash;
 152 }