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x86: SB600: skip ACPI IRQ0 override if it is not routed to INT2 of IOAPIC

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On some more HP laptops BIOS reports an IRQ0 override
but the SB600 chipset is configured such that timer
interrupts go to INT0 of IOAPIC.

Check IRQ0 routing and if it is routed to INT0 of IOAPIC skip the
timer override.

http://bugzilla.kernel.org/show_bug.cgi?id=11715
http://bugzilla.kernel.org/show_bug.cgi?id=11516

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Andreas Herrmann 2008-10-14 21:01:15 +02:00 committed by Len Brown
parent 04ab591808
commit 26adcfbf00
1 changed files with 52 additions and 3 deletions
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55
arch/x86/kernel/early-quirks.c
View File

@ -95,7 +95,8 @@ static void __init nvidia_bugs(int num, int slot, int func)
}
static u32 ati_ixp4x0_rev(int num, int slot, int func)
#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
{
u32 d;
u8 b;
@ -115,7 +116,6 @@ static u32 ati_ixp4x0_rev(int num, int slot, int func)
static void __init ati_bugs(int num, int slot, int func)
{
#if defined(CONFIG_ACPI) && defined (CONFIG_X86_IO_APIC)
u32 d;
u8 b;
@ -138,9 +138,56 @@ static void __init ati_bugs(int num, int slot, int func)
printk(KERN_INFO "If you got timer trouble "
"try acpi_use_timer_override\n");
}
#endif
}
static u32 __init ati_sbx00_rev(int num, int slot, int func)
{
u32 old, d;
d = read_pci_config(num, slot, func, 0x70);
old = d;
d &= ~(1<<8);
write_pci_config(num, slot, func, 0x70, d);
d = read_pci_config(num, slot, func, 0x8);
d &= 0xff;
write_pci_config(num, slot, func, 0x70, old);
return d;
}
static void __init ati_bugs_contd(int num, int slot, int func)
{
u32 d, rev;
if (acpi_use_timer_override)
return;
rev = ati_sbx00_rev(num, slot, func);
if (rev > 0x13)
return;
/* check for IRQ0 interrupt swap */
d = read_pci_config(num, slot, func, 0x64);
if (!(d & (1<<14)))
acpi_skip_timer_override = 1;
if (acpi_skip_timer_override) {
printk(KERN_INFO "SB600 revision 0x%x\n", rev);
printk(KERN_INFO "Ignoring ACPI timer override.\n");
printk(KERN_INFO "If you got timer trouble "
"try acpi_use_timer_override\n");
}
}
#else
static void __init ati_bugs(int num, int slot, int func)
{
}
static void __init ati_bugs_contd(int num, int slot, int func)
{
}
#endif
#ifdef CONFIG_DMAR
static void __init intel_g33_dmar(int num, int slot, int func)
{
@ -176,6 +223,8 @@ static struct chipset early_qrk[] __initdata = {
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
#ifdef CONFIG_DMAR
{ PCI_VENDOR_ID_INTEL, 0x29c0,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar },