patch-2.4.0-test9 linux/arch/arm/kernel/ftv-pci.c

• Lines: 52
• Date: Mon Sep 18 15:15:25 2000
• Orig file: v2.4.0-test8/linux/arch/arm/kernel/ftv-pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test8/linux/arch/arm/kernel/ftv-pci.c linux/arch/arm/kernel/ftv-pci.c
@@ -0,0 +1,51 @@
+/*
+ *  linux/arch/arm/kernel/ftv-pci.c
+ *
+ *  PCI bios-type initialisation for PCI machines
+ *
+ *  Bits taken from various places.
+ */
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include <asm/irq.h>
+#include <asm/mach/pci.h>
+
+/*
+ * Owing to a PCB cockup, issue A backplanes are wired thus:
+ *
+ * Slot 1    2    3    4    5   Bridge   S1    S2    S3    S4
+ * IRQ  D    C    B    A    A            C     B     A     D
+ *      A    D    C    B    B            D     C     B     A
+ *      B    A    D    C    C            A     D     C     B
+ *      C    B    A    D    D            B     A     D     C
+ *
+ * ID A31  A30  A29  A28  A27   A26      DEV4  DEV5  DEV6  DEV7
+ *
+ * Actually, this isn't too bad, because with the processor card
+ * in slot 5 on the primary bus, the IRQs rotate on both sides
+ * as you'd expect.
+ */
+
+static int irqmap_ftv[] __initdata = { IRQ_PCI_D, IRQ_PCI_C, IRQ_PCI_B, IRQ_PCI_A };
+
+static int __init ftv_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	if (slot > 0x10)
+		slot--;
+	return irqmap_ftv[(slot - pin) & 3];
+}
+
+static u8 __init ftv_swizzle(struct pci_dev *dev, u8 *pin)
+{
+	return PCI_SLOT(dev->devfn);
+}
+
+/* ftv host-specific stuff */
+struct hw_pci ftv_pci __initdata = {
+	init:		plx90x0_init,
+	swizzle:	ftv_swizzle,
+	map_irq:	ftv_map_irq,
+};
+