git.sur5r.net Git - u-boot/blob - drivers/mtd/spi/macronix.c

   1 /*
   2  * Copyright 2009(C) Marvell International Ltd. and its affiliates
   3  * Prafulla Wadaskar <prafulla@marvell.com>
   4  *
   5  * Based on drivers/mtd/spi/stmicro.c
   6  *
   7  * Copyright 2008, Network Appliance Inc.
   8  * Jason McMullan <mcmullan@netapp.com>
   9  *
  10  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
  11  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
  12  *
  13  * See file CREDITS for list of people who contributed to this
  14  * project.
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of
  19  * the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  29  * MA 02110-1301 USA
  30  */
  31
  32 #include <common.h>
  33 #include <malloc.h>
  34 #include <spi_flash.h>
  35
  36 #include "spi_flash_internal.h"
  37
  38 /* MX25xx-specific commands */
  39 #define CMD_MX25XX_SE           0x20    /* Sector Erase */
  40 #define CMD_MX25XX_BE           0xD8    /* Block Erase */
  41 #define CMD_MX25XX_CE           0xc7    /* Chip Erase */
  42
  43 struct macronix_spi_flash_params {
  44         u16 idcode;
  45         u16 page_size;
  46         u16 pages_per_sector;
  47         u16 sectors_per_block;
  48         u16 nr_blocks;
  49         const char *name;
  50 };
  51
  52 static const struct macronix_spi_flash_params macronix_spi_flash_table[] = {
  53         {
  54                 .idcode = 0x2013,
  55                 .page_size = 256,
  56                 .pages_per_sector = 16,
  57                 .sectors_per_block = 16,
  58                 .nr_blocks = 8,
  59                 .name = "MX25L4005",
  60         },
  61         {
  62                 .idcode = 0x2014,
  63                 .page_size = 256,
  64                 .pages_per_sector = 16,
  65                 .sectors_per_block = 16,
  66                 .nr_blocks = 16,
  67                 .name = "MX25L8005",
  68         },
  69         {
  70                 .idcode = 0x2015,
  71                 .page_size = 256,
  72                 .pages_per_sector = 16,
  73                 .sectors_per_block = 16,
  74                 .nr_blocks = 32,
  75                 .name = "MX25L1605D",
  76         },
  77         {
  78                 .idcode = 0x2016,
  79                 .page_size = 256,
  80                 .pages_per_sector = 16,
  81                 .sectors_per_block = 16,
  82                 .nr_blocks = 64,
  83                 .name = "MX25L3205D",
  84         },
  85         {
  86                 .idcode = 0x2017,
  87                 .page_size = 256,
  88                 .pages_per_sector = 16,
  89                 .sectors_per_block = 16,
  90                 .nr_blocks = 128,
  91                 .name = "MX25L6405D",
  92         },
  93         {
  94                 .idcode = 0x2018,
  95                 .page_size = 256,
  96                 .pages_per_sector = 16,
  97                 .sectors_per_block = 16,
  98                 .nr_blocks = 256,
  99                 .name = "MX25L12805D",
 100         },
 101         {
 102                 .idcode = 0x2618,
 103                 .page_size = 256,
 104                 .pages_per_sector = 16,
 105                 .sectors_per_block = 16,
 106                 .nr_blocks = 256,
 107                 .name = "MX25L12855E",
 108         },
 109 };
 110
 111 static int macronix_write_status(struct spi_flash *flash, u8 sr)
 112 {
 113         u8 cmd;
 114         int ret;
 115
 116         ret = spi_flash_cmd_write_enable(flash);
 117         if (ret < 0) {
 118                 debug("SF: enabling write failed\n");
 119                 return ret;
 120         }
 121
 122         cmd = CMD_WRITE_STATUS;
 123         ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
 124         if (ret) {
 125                 debug("SF: fail to write status register\n");
 126                 return ret;
 127         }
 128
 129         ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
 130         if (ret < 0) {
 131                 debug("SF: write status register timed out\n");
 132                 return ret;
 133         }
 134
 135         return 0;
 136 }
 137
 138 static int macronix_unlock(struct spi_flash *flash)
 139 {
 140         int ret;
 141
 142         /* Enable status register writing and clear BP# bits */
 143         ret = macronix_write_status(flash, 0);
 144         if (ret)
 145                 debug("SF: fail to disable write protection\n");
 146
 147         return ret;
 148 }
 149
 150 static int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
 151 {
 152         return spi_flash_cmd_erase(flash, CMD_MX25XX_BE, offset, len);
 153 }
 154
 155 struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
 156 {
 157         const struct macronix_spi_flash_params *params;
 158         struct spi_flash *flash;
 159         unsigned int i;
 160         u16 id = idcode[2] | idcode[1] << 8;
 161
 162         for (i = 0; i < ARRAY_SIZE(macronix_spi_flash_table); i++) {
 163                 params = &macronix_spi_flash_table[i];
 164                 if (params->idcode == id)
 165                         break;
 166         }
 167
 168         if (i == ARRAY_SIZE(macronix_spi_flash_table)) {
 169                 debug("SF: Unsupported Macronix ID %04x\n", id);
 170                 return NULL;
 171         }
 172
 173         flash = malloc(sizeof(*flash));
 174         if (!flash) {
 175                 debug("SF: Failed to allocate memory\n");
 176                 return NULL;
 177         }
 178
 179         flash->spi = spi;
 180         flash->name = params->name;
 181
 182         flash->write = spi_flash_cmd_write_multi;
 183         flash->erase = macronix_erase;
 184         flash->read = spi_flash_cmd_read_fast;
 185         flash->page_size = params->page_size;
 186         flash->sector_size = params->page_size * params->pages_per_sector
 187                 * params->sectors_per_block;
 188         flash->size = flash->sector_size * params->nr_blocks;
 189
 190         /* Clear BP# bits for read-only flash */
 191         macronix_unlock(flash);
 192
 193         return flash;
 194 }