1 files changed, 77 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/dsmg600-pci.c b/arch/arm/mach-ixp4xx/dsmg600-pci.c
new file mode 100644
index 000000000..e997d97f6
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/dsmg600-pci.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DSM-G600 board-level PCI initialization
+ *
+ * Copyright (C) 2006 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * based on ixdp425-pci.c:
+ *	Copyright (C) 2002 Intel Corporation.
+ *	Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * Maintainer: http://www.nslu2-linux.org/
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/mach-types.h>
+
+#include "irqs.h"
+
+#define MAX_DEV		4
+#define IRQ_LINES	3
+
+/* PCI controller GPIO to IRQ pin mappings */
+#define INTA		11
+#define INTB		10
+#define INTC		9
+#define INTD		8
+#define INTE		7
+#define INTF		6
+
+void __init dsmg600_pci_preinit(void)
+{
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
+	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTF), IRQ_TYPE_LEVEL_LOW);
+	ixp4xx_pci_preinit();
+}
+
+static int __init dsmg600_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
+		{ IXP4XX_GPIO_IRQ(INTE), -1, -1 },
+		{ IXP4XX_GPIO_IRQ(INTA), -1, -1 },
+		{ IXP4XX_GPIO_IRQ(INTB), IXP4XX_GPIO_IRQ(INTC),
+		  IXP4XX_GPIO_IRQ(INTD) },
+		{ IXP4XX_GPIO_IRQ(INTF), -1, -1 },
+	};
+
+	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
+		return pci_irq_table[slot - 1][pin - 1];
+
+	return -1;
+}
+
+struct hw_pci __initdata dsmg600_pci = {
+	.nr_controllers = 1,
+	.ops		= &ixp4xx_ops,
+	.preinit	= dsmg600_pci_preinit,
+	.setup		= ixp4xx_setup,
+	.map_irq	= dsmg600_map_irq,
+};
+
+int __init dsmg600_pci_init(void)
+{
+	if (machine_is_dsmg600())
+		pci_common_init(&dsmg600_pci);
+
+	return 0;
+}
+
+subsys_initcall(dsmg600_pci_init);