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Setting an integrated southbridge device (like SATA or USB2.0) to 

"off" in Config.lb should cause the PCI device not to respond to
configuration requests.

Replace the existing code that I naively copied from esb6300 with
something that actually works on the 3100.

Signed-off-by: Ed Swierk <eswierk@arastra.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3209 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ed Swierk 2008-04-01 17:14:57 +00:00
parent 23cd49ab80
commit 2b85b6311f
2 changed files with 32 additions and 38 deletions
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57
src/southbridge/intel/i3100/i3100.c
View File

@ -18,52 +18,45 @@
*
*/
/* This code is based on src/southbridge/intel/esb6300/esb6300.c */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include "i3100.h"
void i3100_enable(device_t dev)
{
device_t lpc_dev;
u32 index = 0;
u16 reg_old, reg;
u8 func;
volatile u32 *disable;
/* See if we are behind the i3100 PCI bridge */
lpc_dev = dev_find_slot(dev->bus->secondary, PCI_DEVFN(0x1f, 0));
if ((dev->path.u.pci.devfn & 0xf8) == 0xf8) {
index = dev->path.u.pci.devfn & 7;
}
else if ((dev->path.u.pci.devfn & 0xf8) == 0xe8) {
index = (dev->path.u.pci.devfn & 7) + 8;
}
if ((!lpc_dev) || (index >= 16) || ((1 << index) & 0x3091)) {
if (dev->enabled)
return;
}
if ((lpc_dev->vendor != PCI_VENDOR_ID_INTEL) ||
(lpc_dev->device != PCI_DEVICE_ID_INTEL_3100_LPC)) {
u32 id;
id = pci_read_config32(lpc_dev, PCI_VENDOR_ID);
if (id != (PCI_VENDOR_ID_INTEL |
(PCI_DEVICE_ID_INTEL_3100_LPC << 16))) {
return;
}
}
reg = reg_old = pci_read_config16(lpc_dev, 0xf2);
reg &= ~(1 << index);
if (!dev->enabled) {
reg |= (1 << index);
}
if (reg != reg_old) {
pci_write_config16(lpc_dev, 0xf2, reg);
/*
* To disable an integrated southbridge device, set the corresponding
* flag in the Function Disable register.
*/
/* Temporarily enable the root complex register block at 0xa0000000. */
lpc_dev = dev_find_slot(0x0, PCI_DEVFN(0x1f, 0x0));
pci_write_config32(lpc_dev, 0xf0, 0xa0000000 | (1 << 0));
disable = (volatile u32 *) 0xa0003418;
func = PCI_FUNC(dev->path.u.pci.devfn);
switch (PCI_SLOT(dev->path.u.pci.devfn)) {
case 0x1f: /* LPC (fn0), SATA (fn2), SMBus (fn3) */
*disable |= (1 << (func == 0x0 ? 14 : func));
break;
case 0x1d: /* UHCI (fn0, fn1), EHCI (fn7) */
*disable |= (1 << (func + 8));
break;
case 0x1c: /* PCIe ports B0-B3 (fn0-fn3) */
*disable |= (1 << (func + 16));
break;
}
/* Disable the root complex register block. */
pci_write_config32(lpc_dev, 0xf0, 0);
}
struct chip_operations southbridge_intel_i3100_ops = {
CHIP_NAME("Intel 3100 Southbridge")
.enable_dev = i3100_enable,
};

1
src/southbridge/intel/i3100/i3100_sata.c
View File

@ -72,6 +72,7 @@ static struct device_operations sata_ops = {
.enable_resources = pci_dev_enable_resources,
.init = sata_init,
.scan_bus = 0,
.enable = i3100_enable,
.ops_pci = &lops_pci,
};