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  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <malloc.h>
  11 #include <spi_flash.h>
  12
  13 #include "spi_flash_internal.h"
  14
  15 struct gigadevice_spi_flash_params {
  16         uint16_t        id;
  17         uint16_t        nr_blocks;
  18         const char      *name;
  19 };
  20
  21 static const struct gigadevice_spi_flash_params gigadevice_spi_flash_table[] = {
  22         {
  23                 .id                     = 0x6016,
  24                 .nr_blocks              = 64,
  25                 .name                   = "GD25LQ",
  26         },
  27         {
  28                 .id                     = 0x4017,
  29                 .nr_blocks              = 128,
  30                 .name                   = "GD25Q64B",
  31         },
  32 };
  33
  34 struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
  35 {
  36         const struct gigadevice_spi_flash_params *params;
  37         struct spi_flash *flash;
  38         unsigned int i;
  39
  40         for (i = 0; i < ARRAY_SIZE(gigadevice_spi_flash_table); i++) {
  41                 params = &gigadevice_spi_flash_table[i];
  42                 if (params->id == ((idcode[1] << 8) | idcode[2]))
  43                         break;
  44         }
  45
  46         if (i == ARRAY_SIZE(gigadevice_spi_flash_table)) {
  47                 debug("SF: Unsupported Gigadevice ID %02x%02x\n",
  48                       idcode[1], idcode[2]);
  49                 return NULL;
  50         }
  51
  52         flash = spi_flash_alloc_base(spi, params->name);
  53         if (!flash) {
  54                 debug("SF: Failed to allocate memory\n");
  55                 return NULL;
  56         }
  57         /* page_size */
  58         flash->page_size = 256;
  59         /* sector_size = page_size * pages_per_sector */
  60         flash->sector_size = flash->page_size * 16;
  61         /* size = sector_size * sector_per_block * number of blocks */
  62         flash->size = flash->sector_size * 16 * params->nr_blocks;
  63
  64         return flash;
  65 }