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_RES          0xab    /* Release from DP, and Read Signature */
  38
  39 struct stmicro_spi_flash_params {
  40         u16 id;
  41         u16 pages_per_sector;
  42         u16 nr_sectors;
  43         const char *name;
  44 };
  45
  46 static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
  47         {
  48                 .id = 0x2011,
  49                 .pages_per_sector = 128,
  50                 .nr_sectors = 4,
  51                 .name = "M25P10",
  52         },
  53         {
  54                 .id = 0x2015,
  55                 .pages_per_sector = 256,
  56                 .nr_sectors = 32,
  57                 .name = "M25P16",
  58         },
  59         {
  60                 .id = 0x2012,
  61                 .pages_per_sector = 256,
  62                 .nr_sectors = 4,
  63                 .name = "M25P20",
  64         },
  65         {
  66                 .id = 0x2016,
  67                 .pages_per_sector = 256,
  68                 .nr_sectors = 64,
  69                 .name = "M25P32",
  70         },
  71         {
  72                 .id = 0x2013,
  73                 .pages_per_sector = 256,
  74                 .nr_sectors = 8,
  75                 .name = "M25P40",
  76         },
  77         {
  78                 .id = 0x2017,
  79                 .pages_per_sector = 256,
  80                 .nr_sectors = 128,
  81                 .name = "M25P64",
  82         },
  83         {
  84                 .id = 0x2014,
  85                 .pages_per_sector = 256,
  86                 .nr_sectors = 16,
  87                 .name = "M25P80",
  88         },
  89         {
  90                 .id = 0x2018,
  91                 .pages_per_sector = 1024,
  92                 .nr_sectors = 64,
  93                 .name = "M25P128",
  94         },
  95         {
  96                 .id = 0xba19,
  97                 .pages_per_sector = 256,
  98                 .nr_sectors = 512,
  99                 .name = "N25Q256",
 100         },
 101 };
 102
 103 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 104 {
 105         const struct stmicro_spi_flash_params *params;
 106         struct spi_flash *flash;
 107         unsigned int i;
 108         u16 id;
 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         id = ((idcode[1] << 8) | idcode[2]);
 124
 125         for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
 126                 params = &stmicro_spi_flash_table[i];
 127                 if (params->id == id) {
 128                         break;
 129                 }
 130         }
 131
 132         if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
 133                 debug("SF: Unsupported STMicro ID %04x\n", id);
 134                 return NULL;
 135         }
 136
 137         flash = malloc(sizeof(*flash));
 138         if (!flash) {
 139                 debug("SF: Failed to allocate memory\n");
 140                 return NULL;
 141         }
 142
 143         flash->spi = spi;
 144         flash->name = params->name;
 145
 146         flash->write = spi_flash_cmd_write_multi;
 147         flash->erase = spi_flash_cmd_erase;
 148         flash->read = spi_flash_cmd_read_fast;
 149         flash->page_size = 256;
 150         flash->sector_size = 256 * params->pages_per_sector;
 151         flash->size = flash->sector_size * params->nr_sectors;
 152
 153         return flash;
 154 }