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util/superiotool: distinguish between VT82C686 and VT1211 

They both have a device id of 0x3c. The former is part of the PCI chip set
accessible via port 0x3f0 while the latter is a standalone LPC chip accessible
via 0x2e/0x4e depending on strapping.

They're not register compatible: the VT82C686 only provides a FDC, LPT and part
of UARTs.

The VT82C686 documentation suggests it has revision 0x00 while the VT1211
datasheet indicates 0x01. Nevertheless, the VT1211 I happen to have hs a
revision of 0x02. Thus the revision is probably not good enough to tell one
from the another.

Change-Id: Ic7529c84724c8d6b9eb75b863f1bceef5e4b52b5
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-on: https://review.coreboot.org/22254
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Lubomir Rintel 2017-10-31 09:25:18 +01:00 committed by Stefan Reinauer
parent 2f6a29e2e6
commit 4d1bbe9908
1 changed files with 17 additions and 11 deletions
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28
util/superiotool/via.c
View File

@ -23,7 +23,9 @@
#define DEVICE_REV_VT1211_REG 0x21
static const struct superio_registers reg_table[] = {
{0x3c, "VT82C686A/VT82C686B/VT1211", {
{0x3c00, "VT82C686A/VT82C686B", {
{EOT}}},
{0x3c01, "VT1211", {
{EOT}}},
{EOT}
};
@ -75,41 +77,45 @@ static void exit_conf_mode_via_vt82c686(void)
void probe_idregs_via(uint16_t port)
{
uint16_t id;
uint8_t devid;
uint8_t rev;
if (port == 0x3f0) {
probing_for("VIA", "(init=vt82c686)", port);
probing_for("VIA", "(init=vt82c686) ", port);
if (enter_conf_mode_via_vt82c686())
return;
id = regval(port, DEVICE_ID_VT82C686_REG);
devid = regval(port, DEVICE_ID_VT82C686_REG);
rev = regval(port, DEVICE_REV_VT82C686_REG);
id = devid << 8;
if (superio_unknown(reg_table, id)) {
if (verbose)
printf(NOTFOUND "id=0x%04x, rev=0x%02x\n", id, rev);
printf(NOTFOUND "id=0x%02x, rev=0x%02x\n", devid, rev);
} else {
printf("Found VIA %s (id=0x%04x, rev=0x%02x) at 0x%x\n",
get_superio_name(reg_table, id), id, rev, port);
printf("Found VIA %s (id=0x%02x, rev=0x%02x) at 0x%x\n",
get_superio_name(reg_table, id), devid, rev, port);
chip_found = 1;
}
exit_conf_mode_via_vt82c686();
if (chip_found)
return;
} else {
probing_for("VIA", "(init=0x87,0x87)", port);
probing_for("VIA", "(init=0x87,0x87) ", port);
enter_conf_mode_winbond_fintek_ite_8787(port);
id = regval(port, DEVICE_ID_VT1211_REG);
devid = regval(port, DEVICE_ID_VT1211_REG);
rev = regval(port, DEVICE_REV_VT1211_REG);
id = (devid << 8) | 1;
if (superio_unknown(reg_table, id)) {
if (verbose)
printf(NOTFOUND "id=0x%04x, rev=0x%02x\n", id, rev);
printf(NOTFOUND "id=0x%02x, rev=0x%02x\n", devid, rev);
} else {
printf("Found VIA %s (id=0x%04x, rev=0x%02x) at 0x%x\n",
get_superio_name(reg_table, id), id, rev, port);
printf("Found VIA %s (id=0x%02x, rev=0x%02x) at 0x%x\n",
get_superio_name(reg_table, id), devid, rev, port);
chip_found = 1;
dump_superio("VIA", reg_table, port, id, LDN_SEL);
}
}