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/*
* This file is part of the LinuxBIOS project.
*
* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Seems the link and width of HT link needs to be setup too, you need to
* generate PCI reset or LDTSTOP to apply.
*/
u8 k8t890_early_setup_car(u8 width, u8 speed)
{
u8 awidth, aspeed;
print_debug("LDT width and speed for K8T890 was");
awidth = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x67);
print_debug_hex8(awidth);
aspeed = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x6d);
print_debug_hex8(aspeed);
if ((aspeed == speed) && (((width == 16) && (awidth == 0x11)) ||
((width == 8) && (awidth == 0x00))))
return 0;
/* Update the desired HT LNK capabilities in NB too. */
pci_write_config8(PCI_DEV(0, 0x0, 0), 0x67,
(width == 16) ? 0x11 : 0x00);
pci_write_config8(PCI_DEV(0, 0x0, 0), 0x6d, speed);
print_debug(" and will after HT reset: ");
awidth = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x67);
print_debug_hex8(awidth);
aspeed = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x6d);
print_debug_hex8(aspeed);
print_debug("\n");
return 1;
}
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