ixp4xx: support omicron ixp425 based boards

This patch adds board support for the DEVIXP, the MICCPT, and the
MIC256, which are three IXP425 based boards produced by OMICRON
electronics, GmbH.

Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 78 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/miccpt-pci.c b/arch/arm/mach-ixp4xx/miccpt-pci.c
new file mode 100644
index 000000000000..ca0bae7fca90
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/miccpt-pci.c
@@ -0,0 +1,78 @@
+/*
+ * arch/arm/mach-ixp4xx/miccpt-pci.c
+ *
+ * MICCPT board-level PCI initialization
+ *
+ * Copyright (C) 2002 Intel Corporation.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ * Copyright (C) 2006 OMICRON electronics GmbH
+ *
+ * Author: Michael Jochum <michael.jochum@omicron.at>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <asm/mach/pci.h>
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+
+#define MAX_DEV         4
+#define IRQ_LINES       4
+
+/* PCI controller GPIO to IRQ pin mappings */
+#define INTA            1
+#define INTB            2
+#define INTC            3
+#define INTD            4
+
+
+void __init miccpt_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);
+        ixp4xx_pci_preinit();
+}
+
+static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+        static int pci_irq_table[IRQ_LINES] = {
+                IXP4XX_GPIO_IRQ(INTA),
+                IXP4XX_GPIO_IRQ(INTB),
+                IXP4XX_GPIO_IRQ(INTC),
+                IXP4XX_GPIO_IRQ(INTD)
+        };
+
+        if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
+                return pci_irq_table[(slot + pin - 2) % 4];
+
+        return -1;
+}
+
+struct hw_pci miccpt_pci __initdata = {
+        .nr_controllers = 1,
+        .preinit        = miccpt_pci_preinit,
+        .swizzle        = pci_std_swizzle,
+        .setup          = ixp4xx_setup,
+        .scan           = ixp4xx_scan_bus,
+        .map_irq        = miccpt_map_irq,
+};
+
+int __init miccpt_pci_init(void)
+{
+        if (machine_is_miccpt())
+                pci_common_init(&miccpt_pci);
+        return 0;
+}
+
+subsys_initcall(miccpt_pci_init);