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
  49 struct 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
  57 static 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
 116 static 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
 121 struct 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 }