1 files changed, 87 insertions, 0 deletions
diff --git a/packages/linux/openslug-kernel-2.6.11/nslu2-pci.c b/packages/linux/openslug-kernel-2.6.11/nslu2-pci.c
index e69de29bb2..7327c65a4f 100644
--- a/packages/linux/openslug-kernel-2.6.11/nslu2-pci.c
+++ b/packages/linux/openslug-kernel-2.6.11/nslu2-pci.c
@@ -0,0 +1,87 @@
+/*
+ * arch/arm/mach-ixp4xx/nslu2-pci.c
+ *
+ * NSLU2 board-level PCI initialization
+ *
+ * based on ixdp425-pci.c:
+ *	Copyright (C) 2002 Intel Corporation.
+ *	Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * Maintainer: http://www.nslu2-linux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+// GPIO 8 is used as the power input so is not free for use as a PCI IRQ
+// However, all the common PCI setup code presumes the standard 4 PCI
+// interrupts are available.  So we compromise...we don't enable the
+// IRQ on Pin 8 but we let
+
+#include <linux/config.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/mach/pci.h>
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+
+void __init nslu2_pci_preinit(void)
+{
+	gpio_line_config(NSLU2_PCI_INTA_PIN,
+				IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
+	gpio_line_config(NSLU2_PCI_INTB_PIN,
+				IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
+	gpio_line_config(NSLU2_PCI_INTC_PIN,
+				IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
+//	gpio_line_config(NSLU2_PCI_INTD_PIN,
+//				IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
+
+	gpio_line_isr_clear(NSLU2_PCI_INTA_PIN);
+	gpio_line_isr_clear(NSLU2_PCI_INTB_PIN);
+	gpio_line_isr_clear(NSLU2_PCI_INTC_PIN);
+//	gpio_line_isr_clear(NSLU2_PCI_INTD_PIN);
+
+	ixp4xx_pci_preinit();
+}
+
+static int __init nslu2_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+	static int pci_irq_table[NSLU2_PCI_IRQ_LINES] = {
+		IRQ_NSLU2_PCI_INTA,
+		IRQ_NSLU2_PCI_INTB,
+		IRQ_NSLU2_PCI_INTC,
+//		IRQ_NSLU2_PCI_INTD
+	};
+
+	int irq = -1;
+
+	if (slot >= 1 && slot <= NSLU2_PCI_MAX_DEV &&
+		pin >= 1 && pin <= NSLU2_PCI_IRQ_LINES) {
+		irq = pci_irq_table[(slot + pin - 2) % 3]; // ! % 4 kas11
+	}
+
+	return irq;
+}
+
+struct hw_pci __initdata nslu2_pci = {
+	.nr_controllers = 1,
+	.preinit	= nslu2_pci_preinit,
+	.swizzle	= pci_std_swizzle,
+	.setup		= ixp4xx_setup,
+	.scan		= ixp4xx_scan_bus,
+	.map_irq	= nslu2_map_irq,
+};
+
+int __init nslu2_pci_init(void)		//monkey see, monkey do
+{
+	if (machine_is_nslu2())
+		pci_common_init(&nslu2_pci);
+	return 0;
+}
+
+subsys_initcall(nslu2_pci_init);
+