Re: pci detection on alpha fails to assign irq to on-board usb device

Ivan Kokshaysky
2005-09-16T11:09:27Z

On Fri, Sep 16, 2005 at 12:13:25AM -0400, Ilia Mirkin wrote:
> Tried with 2.6.13.1 -- same thing. If you think that there are relevant
> patches that went into -rc1 that are not in .1, I could try that out
> too. A cursory look does not suggest any though.

USB has never worked on these machines with stock kernels.
Please try appended patch (also make sure that "usb_enable" is "on"
in SRM.

Ivan.

--- linux/arch/alpha/kernel/sys_dp264.c.orig Fri Sep 16 14:41:22 2005
+++ linux/arch/alpha/kernel/sys_dp264.c Fri Sep 16 14:48:13 2005
@@ -395,6 +395,22 @@ clipper_init_irq(void)
*/

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)
{
static char irq_tab[6][5] __initdata = {
@@ -407,25 +423,13 @@ dp264_map_irq(struct pci_dev *dev, u8 sl
{ 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 sl
{ 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
{ 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
{ -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