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Based in info gleaned from the web and other drivers (including the Linux

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sx driver), change a magic value in the PLX bridge chip.  Apparently later
builds of the PCI cards had corrected values in the configuration eeprom.
This change supposedly fixes some pci bus problems.
This commit is contained in:
peter 2007-12-01 20:39:47 +00:00
parent 993b36f0ab
commit a032664fc9
1 changed files with 23 additions and 0 deletions
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23
sys/dev/si/si_pci.c
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@ -105,6 +105,29 @@ si_pci_attach(device_t dev)
goto fail;
}
if (pci_get_devid(dev) == 0x200011cb) {
int rid;
struct resource *plx_res;
uint32_t *addr;
uint32_t oldvalue;
/* Perform a PLX control register fixup */
rid = PCIR_BAR(0);
plx_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (plx_res == NULL) {
device_printf(dev, "couldn't map plx registers\n");
} else {
addr = rman_get_virtual(plx_res);
oldvalue = addr[0x50 / 4];
if (oldvalue != 0x18260000) {
device_printf(dev, "PLX register 0x50: 0x%08x changed to 0x%08x\n", oldvalue, 0x18260000);
addr[0x50 / 4] = 0x18260000;
}
bus_release_resource(dev, SYS_RES_MEMORY, rid, plx_res);
}
}
error = siattach(dev);
if (error)
goto fail;