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| author | Ronald G. Minnich <rminnich@gmail.com> | 2004-09-30 16:37:01 +0000 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2004-09-30 16:37:01 +0000 |
| commit | 2b763af4ca6541734ff7d36a16173f9606c248c9 (patch) | |
| tree | 38e06456e1b64284d33a2e48da7ef4a9fc67f40d /util/flash_and_burn/jedec.c | |
| parent | 1b41f6b480ae3bebbb319d9154aebb140fbbcf62 (diff) | |
| download | coreboot-2b763af4ca6541734ff7d36a16173f9606c248c9.tar.xz | |
support for sst firmware hub
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1651 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/flash_and_burn/jedec.c')
| -rw-r--r-- | util/flash_and_burn/jedec.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/util/flash_and_burn/jedec.c b/util/flash_and_burn/jedec.c index d99e774be7..19a233b81c 100644 --- a/util/flash_and_burn/jedec.c +++ b/util/flash_and_burn/jedec.c @@ -89,6 +89,35 @@ int erase_sector_jedec(volatile unsigned char *bios, unsigned int page) return (0); } +int erase_block_jedec(volatile unsigned char *bios, unsigned int block) +{ + volatile unsigned char *Temp; + + /* Issue the Sector Erase command */ + Temp = bios + 0x5555; /* set up address to be BASE:5555h */ + *Temp = 0xAA; /* write data 0xAA to the address */ + myusec_delay(10); + Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */ + *Temp = 0x55; /* write data 0x55 to the address */ + myusec_delay(10); + Temp = bios + 0x5555; /* set up address to be BASE:5555h */ + *Temp = 0x80; /* write data 0x80 to the address */ + myusec_delay(10); + Temp = bios + 0x5555; /* set up address to be BASE:5555h */ + *Temp = 0xAA; /* write data 0xAA to the address */ + myusec_delay(10); + Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */ + *Temp = 0x55; /* write data 0x55 to the address */ + myusec_delay(10); + Temp = bios + block; /* set up address to be the current sector */ + *Temp = 0x50; /* write data 0x30 to the address */ + myusec_delay(10); + + /* wait for Toggle bit ready */ + toggle_ready_jedec(bios); + + return (0); +} int erase_chip_jedec(struct flashchip *flash) { |