drivers/mtd/spi/gigadevice.c

   1 /*
   2  * Gigadevice SPI flash driver
   3  * Copyright 2013, Samsung Electronics Co., Ltd.
   4  * Author: Banajit Goswami <banajit.g@samsung.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <common.h>
  26 #include <malloc.h>
  27 #include <spi_flash.h>
  28
  29 #include "spi_flash_internal.h"
  30
  31 struct gigadevice_spi_flash_params {
  32         uint16_t        id;
  33         uint16_t        nr_blocks;
  34         const char      *name;
  35 };
  36
  37 static const struct gigadevice_spi_flash_params gigadevice_spi_flash_table[] = {
  38         {
  39                 .id                     = 0x6016,
  40                 .nr_blocks              = 64,
  41                 .name                   = "GD25LQ",
  42         },
  43         {
  44                 .id                     = 0x4017,
  45                 .nr_blocks              = 128,
  46                 .name                   = "GD25Q64B",
  47         },
  48 };
  49
  50 struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
  51 {
  52         const struct gigadevice_spi_flash_params *params;
  53         struct spi_flash *flash;
  54         unsigned int i;
  55
  56         for (i = 0; i < ARRAY_SIZE(gigadevice_spi_flash_table); i++) {
  57                 params = &gigadevice_spi_flash_table[i];
  58                 if (params->id == ((idcode[1] << 8) | idcode[2]))
  59                         break;
  60         }
  61
  62         if (i == ARRAY_SIZE(gigadevice_spi_flash_table)) {
  63                 debug("SF: Unsupported Gigadevice ID %02x%02x\n",
  64                                 idcode[1], idcode[2]);
  65                 return NULL;
  66         }
  67
  68         flash = spi_flash_alloc_base(spi, params->name);
  69         if (!flash) {
  70                 debug("SF: Failed to allocate memory\n");
  71                 return NULL;
  72         }
  73         /* page_size */
  74         flash->page_size = 256;
  75         /* sector_size = page_size * pages_per_sector */
  76         flash->sector_size = flash->page_size * 16;
  77         /* size = sector_size * sector_per_block * number of blocks */
  78         flash->size = flash->sector_size * 16 * params->nr_blocks;
  79
  80         return flash;
  81 }