| Rajeshwari Shinde | 22ea934 | 2013-01-22 20:30:18 +0000 | [diff] [blame^] | 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 | } |