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Diffstat (limited to 'src/flash/nor/spi.h')
| -rw-r--r-- | src/flash/nor/spi.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/flash/nor/spi.h b/src/flash/nor/spi.h new file mode 100644 index 00000000..319b00b9 --- /dev/null +++ b/src/flash/nor/spi.h @@ -0,0 +1,58 @@ +/*************************************************************************** + * Copyright (C) 2012 by George Harris * + * george@luminairecoffee.com * + * * + * Copyright (C) 2010 by Antonio Borneo * + * borneo.antonio@gmail.com * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ + +/* data structure to maintain flash ids from different vendors */ +struct flash_device { + char *name; + uint8_t erase_cmd; + uint8_t chip_erase_cmd; + uint32_t device_id; + uint32_t pagesize; + unsigned long sectorsize; + unsigned long size_in_bytes; +}; + +#define FLASH_ID(n, es, ces, id, psize, ssize, size) \ +{ \ + .name = n, \ + .erase_cmd = es, \ + .chip_erase_cmd = ces, \ + .device_id = id, \ + .pagesize = psize, \ + .sectorsize = ssize, \ + .size_in_bytes = size \ +} + +extern struct flash_device flash_devices[]; + +/* fields in SPI flash status register */ +#define SPIFLASH_BSY_BIT 0x00000001 /* WIP Bit of SPI SR on SMI SR */ +#define SPIFLASH_WE_BIT 0x00000002 /* WEL Bit of SPI SR on SMI SR */ + +/* SPI Flash Commands */ +#define SPIFLASH_READ_ID 0x9F /* Read Flash Identification */ +#define SPIFLASH_READ_STATUS 0x05 /* Read Status Register */ +#define SPIFLASH_WRITE_ENABLE 0x06 /* Write Enable */ +#define SPIFLASH_PAGE_PROGRAM 0x02 /* Page Program */ +#define SPIFLASH_FAST_READ 0x0B /* Fast Read */ +#define SPIFLASH_READ 0x03 /* Normal Read */ |