From 997a51ae373df6484cdd4a5fc61a9c9bec82cd68 Mon Sep 17 00:00:00 2001 From: Ivan Kokshaysky Date: Mon, 19 Sep 2005 18:55:51 +0400 Subject: [PATCH] Alpha: ISA IRQs fixup for dp264 Basically, this extends original dp264 fixup to all dp264 variations. Here is one minor change: mask out bits 4-7 of a value assigned by SRM, because - newer consoles report ISA IRQs with offset 0xe0; - even if console IRQ value is bogus, we'll have a value < 16 so it should be harmless as it won't clash with native IRQs. Particularly this fixes USB interrupt problem on xp1000 and es40. Signed-off-by: Ivan Kokshaysky Acked-by: Richard Henderson Signed-off-by: Linus Torvalds --- arch/alpha/kernel/sys_dp264.c | 41 +++++++++++++++++++++++------------------ 1 file changed, 23 insertions(+), 18 deletions(-) (limited to 'arch/alpha/kernel/sys_dp264.c') diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c index 9e36b07fa940..d5da6b1b28ee 100644 --- a/arch/alpha/kernel/sys_dp264.c +++ b/arch/alpha/kernel/sys_dp264.c @@ -394,6 +394,22 @@ clipper_init_irq(void) * 10 64 bit PCI option slot 3 (not bus 0) */ +static int __init +isa_irq_fixup(struct pci_dev *dev, int irq) +{ + u8 irq8; + + if (irq > 0) + return irq; + + /* This interrupt is routed via ISA bridge, so we'll + just have to trust whatever value the console might + have assigned. */ + pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8); + + return irq8 & 0xf; +} + static int __init dp264_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { @@ -407,25 +423,13 @@ dp264_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0} /* IdSel 10 slot 3 */ }; const long min_idsel = 5, max_idsel = 10, irqs_per_slot = 5; - struct pci_controller *hose = dev->sysdata; int irq = COMMON_TABLE_LOOKUP; - if (irq > 0) { + if (irq > 0) irq += 16 * hose->index; - } else { - /* ??? The Contaq IDE controller on the ISA bridge uses - "legacy" interrupts 14 and 15. I don't know if anything - can wind up at the same slot+pin on hose1, so we'll - just have to trust whatever value the console might - have assigned. */ - - u8 irq8; - pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8); - irq = irq8; - } - return irq; + return isa_irq_fixup(dev, irq); } static int __init @@ -453,7 +457,8 @@ monet_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { 24, 24, 25, 26, 27} /* IdSel 15 slot 5 PCI2*/ }; const long min_idsel = 3, max_idsel = 15, irqs_per_slot = 5; - return COMMON_TABLE_LOOKUP; + + return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP); } static u8 __init @@ -507,7 +512,8 @@ webbrick_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { 47, 47, 46, 45, 44}, /* IdSel 17 slot 3 */ }; const long min_idsel = 7, max_idsel = 17, irqs_per_slot = 5; - return COMMON_TABLE_LOOKUP; + + return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP); } static int __init @@ -524,14 +530,13 @@ clipper_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { -1, -1, -1, -1, -1} /* IdSel 7 ISA Bridge */ }; const long min_idsel = 1, max_idsel = 7, irqs_per_slot = 5; - struct pci_controller *hose = dev->sysdata; int irq = COMMON_TABLE_LOOKUP; if (irq > 0) irq += 16 * hose->index; - return irq; + return isa_irq_fixup(dev, irq); } static void __init -- cgit v1.2.3