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Improve VIA K8M890 HT settings. Use recommended settings for ROMSIP and 

for the transmit clock driving control. Unfortunately this is not enough
to make the HT1000 work reliably, therefore blacklist this for now in CPU
HT code. If ever anyone figure out what is wrong, it could be removed. The
downgrading now makes the board work on HT800, which is certainly better than
not at all with a HT1000 CPU.

Change-Id: I949bfd9b0b48ee12bd0234c2fb1deaaa773bd235
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Reviewed-on: http://review.coreboot.org/68
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Rudolf Marek 2011-06-29 23:47:20 +02:00 committed by Stefan Reinauer
parent 0d21cd36b7
commit 23b215272d
3 changed files with 28 additions and 3 deletions
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7
src/northbridge/amd/amdk8/incoherent_ht.c
View File

@ -148,8 +148,11 @@ static uint16_t ht_read_freq_cap(device_t dev, uint8_t pos)
}
printk(BIOS_SPEW, "pos=0x%x, filtered freq_cap=0x%x\n", pos, freq_cap);
//printk(BIOS_SPEW, "capping to 800/600/400/200 MHz\n");
//freq_cap &= 0x3f;
#if CONFIG_SOUTHBRIDGE_VIA_K8M890 == 1
freq_cap &= 0x3f;
printk(BIOS_INFO, "Limiting HT to 800/600/400/200 MHz until K8M890 HT1000 is fixed.\n");
#endif
return freq_cap;
}

2
src/southbridge/via/k8t890/early_car.c
View File

@ -77,6 +77,8 @@ u8 k8t890_early_setup_ht(void)
print_debug("K8T800 Pro found at LDT ");
#elif CONFIG_SOUTHBRIDGE_VIA_K8M890
print_debug("K8M890 found at LDT ");
/* K8M890 fix HT delay */
pci_write_config8(PCI_DEV(0, 0x0, 2), 0xab, 0x22);
#elif CONFIG_SOUTHBRIDGE_VIA_K8T890
print_debug("K8T890 found at LDT ");
#endif

22
src/southbridge/via/k8t890/romstrap.inc
View File

@ -52,7 +52,27 @@ tblpointer:
.long 0x0
.long 0x0
#elif CONFIG_SOUTHBRIDGE_VIA_K8M890 || CONFIG_SOUTHBRIDGE_VIA_K8T890
#elif CONFIG_SOUTHBRIDGE_VIA_K8M890
tblpointer:
.long 0x504400FF, 0x61970FC2 //;200M
.long 0x504400FF, 0x61970FC2 //;400M
.long 0x504400FF, 0x61970FC2 //;600M
.long 0x504400FF, 0x61970FC2 //;800M
.long 0x504400FF, 0x61970FC2 //;1000M
.long 0x0
.long 0x0
.long 0x0
.long 0x0
.long 0x0
.long 0x0
.long 0x0
.long 0x0
.long 0x0
.long 0x0
#elif CONFIG_SOUTHBRIDGE_VIA_K8T890
tblpointer:
.long 0x504400AA, 0x61970FC2 //;200M