GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add support for ST M25P80 chips to flashrom. Detection was tested. 

Print status register before erase to help debugging block locks.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Corey Osgood <corey.osgood@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3008 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Carl-Daniel Hailfinger 2007-12-16 21:15:27 +00:00
parent c9a677b4b3
commit 3b408fd237
3 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
util/flashrom/flash.h
View File

@ -167,7 +167,12 @@ extern struct flashchip flashchips[];
#define SST_49LF016C 0x5C
#define SST_49LF160C 0x4C
/*
* ST25P chips are SPI, first byte of device ID is memory type, second
* byte of device ID is related to log(bitsize) at least for some chips.
*/
#define ST_ID 0x20 /* ST */
#define ST_M25P80 0x2014
#define ST_M50FLW040A 0x08
#define ST_M50FLW040B 0x28
#define ST_M50FLW080A 0x80

2
util/flashrom/flashchips.c
View File

@ -140,6 +140,8 @@ struct flashchip flashchips[] = {
probe_jedec, erase_chip_jedec, write_jedec},
{"M29F040B", ST_ID, ST_M29F040B, 512, 64 * 1024,
probe_29f040b, erase_29f040b, write_29f040b},
{"M25P80", ST_ID, ST_M25P80, 1024, 64 * 1024,
probe_spi, generic_spi_chip_erase, generic_spi_chip_write},
{"82802ab", 137, 173, 512, 64 * 1024,
probe_82802ab, erase_82802ab, write_82802ab},
{"82802ac", 137, 172, 1024, 64 * 1024,

4
util/flashrom/spi.c
View File

@ -280,6 +280,10 @@ uint8_t generic_spi_read_status_register()
int generic_spi_chip_erase(struct flashchip *flash)
{
const unsigned char cmd[] = JEDEC_CE_2;
uint8_t statusreg;
statusreg = generic_spi_read_status_register();
printf("chip status register before erase is %02x\n", statusreg);
generic_spi_write_enable();
/* Send CE (Chip Erase) */