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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/arm/mach-ixp4xx/ixdp425-pci.c
Initial import
Diffstat (limited to 'arch/arm/mach-ixp4xx/ixdp425-pci.c')
-rw-r--r--arch/arm/mach-ixp4xx/ixdp425-pci.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/ixdp425-pci.c b/arch/arm/mach-ixp4xx/ixdp425-pci.c
new file mode 100644
index 000000000..318424dd3
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/ixdp425-pci.c
@@ -0,0 +1,77 @@
+/*
+ * arch/arm/mach-ixp4xx/ixdp425-pci.c
+ *
+ * IXDP425 board-level PCI initialization
+ *
+ * Copyright (C) 2002 Intel Corporation.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * Maintainer: Deepak Saxena <dsaxena@plexity.net>
+ *
+ * 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/irq.h>
+#include <linux/delay.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 11
+#define INTB 10
+#define INTC 9
+#define INTD 8
+
+
+void __init ixdp425_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 ixdp425_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 ixdp425_pci __initdata = {
+ .nr_controllers = 1,
+ .ops = &ixp4xx_ops,
+ .preinit = ixdp425_pci_preinit,
+ .setup = ixp4xx_setup,
+ .map_irq = ixdp425_map_irq,
+};
+
+int __init ixdp425_pci_init(void)
+{
+ if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
+ machine_is_ixdp465() || machine_is_kixrp435())
+ pci_common_init(&ixdp425_pci);
+ return 0;
+}
+
+subsys_initcall(ixdp425_pci_init);