Merge branch 'next/board' of git://git.linaro.org/people/arnd/arm-soc

[pandora-kernel.git] / arch / arm / mach-ixp4xx / miccpt-pci.c

diff --git a/arch/arm/mach-ixp4xx/miccpt-pci.c b/arch/arm/mach-ixp4xx/miccpt-pci.c
new file mode 100644 (file)
index 0000000..ca0bae7
--- /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);