patch-2.4.0-test8 linux/arch/arm/mach-footbridge/personal-pci.c

• Lines: 44
• Date: Sun Sep 3 11:19:11 2000
• Orig file: v2.4.0-test7/linux/arch/arm/mach-footbridge/personal-pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test7/linux/arch/arm/mach-footbridge/personal-pci.c linux/arch/arm/mach-footbridge/personal-pci.c
@@ -0,0 +1,43 @@
+/*
+ * linux/arch/arm/mach-footbridge/personal-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>
+
+static int irqmap_personal_server[] __initdata = {
+	IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
+	IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
+};
+
+static int __init personal_server_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	unsigned char line;
+
+	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
+
+	if (line > 0x40 && line <= 0x5f) {
+		/* line corresponds to the bit controlling this interrupt
+		 * in the footbridge.  Ignore the first 8 interrupt bits,
+		 * look up the rest in the map.  IN0 is bit number 8
+		 */
+		return irqmap_personal_server[(line & 0x1f) - 8];
+	} else if (line == 0) {
+		/* no interrupt */
+		return 0;
+	} else
+		return irqmap_personal_server[(line - 1) & 3];
+}
+
+struct hw_pci personal_server_pci __initdata = {
+	init:		dc21285_init,
+	swizzle:	no_swizzle,
+	map_irq:	personal_server_map_irq,
+};