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Allow the SiS 620 chipset to detect and read at least 256kb chips

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Based on the 5595 datasheet and uniflash 1.40 sources, only looking for info
about SiS620.

Corresponding to flashrom svn r325 and coreboot v2 svn r3668.

Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>
This commit is contained in:
Urja Rannikko 2008-10-18 13:54:30 +00:00 committed by Peter Stuge
parent 3af487d419
commit a88daa731d
1 changed files with 11 additions and 0 deletions
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11
chipset_enable.c
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@ -540,6 +540,17 @@ static int enable_flash_sis5595(struct pci_dev *dev, const char *name)
return -1;
}
/* Extended BIOS enable = 1, Lower BIOS Enable = 1 */
new = pci_read_byte(dev,0x40);
new &= 0xFB;
new |= 0x3;
pci_write_byte(dev,0x40,new);
newer = pci_read_byte(dev,0x40);
if (newer != new) {
printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x40, new, name);
printf("Stuck at 0x%x\n", newer);
return -1;
}
return 0;
}