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Diffstat (limited to 'arch/arm/mach-exynos/irq-combiner.c')
-rw-r--r--arch/arm/mach-exynos/irq-combiner.c124
1 files changed, 0 insertions, 124 deletions
diff --git a/arch/arm/mach-exynos/irq-combiner.c b/arch/arm/mach-exynos/irq-combiner.c
deleted file mode 100644
index 5a2758ab055..00000000000
--- a/arch/arm/mach-exynos/irq-combiner.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/* linux/arch/arm/mach-exynos4/irq-combiner.c
- *
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Based on arch/arm/common/gic.c
- *
- * IRQ COMBINER support
- *
- * 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/io.h>
-
-#include <asm/mach/irq.h>
-
-#define COMBINER_ENABLE_SET 0x0
-#define COMBINER_ENABLE_CLEAR 0x4
-#define COMBINER_INT_STATUS 0xC
-
-static DEFINE_SPINLOCK(irq_controller_lock);
-
-struct combiner_chip_data {
- unsigned int irq_offset;
- unsigned int irq_mask;
- void __iomem *base;
-};
-
-static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
-
-static inline void __iomem *combiner_base(struct irq_data *data)
-{
- struct combiner_chip_data *combiner_data =
- irq_data_get_irq_chip_data(data);
-
- return combiner_data->base;
-}
-
-static void combiner_mask_irq(struct irq_data *data)
-{
- u32 mask = 1 << (data->irq % 32);
-
- __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
-}
-
-static void combiner_unmask_irq(struct irq_data *data)
-{
- u32 mask = 1 << (data->irq % 32);
-
- __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
-}
-
-static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
-{
- struct combiner_chip_data *chip_data = irq_get_handler_data(irq);
- struct irq_chip *chip = irq_get_chip(irq);
- unsigned int cascade_irq, combiner_irq;
- unsigned long status;
-
- chained_irq_enter(chip, desc);
-
- spin_lock(&irq_controller_lock);
- status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
- spin_unlock(&irq_controller_lock);
- status &= chip_data->irq_mask;
-
- if (status == 0)
- goto out;
-
- combiner_irq = __ffs(status);
-
- cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
- if (unlikely(cascade_irq >= NR_IRQS))
- do_bad_IRQ(cascade_irq, desc);
- else
- generic_handle_irq(cascade_irq);
-
- out:
- chained_irq_exit(chip, desc);
-}
-
-static struct irq_chip combiner_chip = {
- .name = "COMBINER",
- .irq_mask = combiner_mask_irq,
- .irq_unmask = combiner_unmask_irq,
-};
-
-void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
-{
- if (combiner_nr >= MAX_COMBINER_NR)
- BUG();
- if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
- BUG();
- irq_set_chained_handler(irq, combiner_handle_cascade_irq);
-}
-
-void __init combiner_init(unsigned int combiner_nr, void __iomem *base,
- unsigned int irq_start)
-{
- unsigned int i;
-
- if (combiner_nr >= MAX_COMBINER_NR)
- BUG();
-
- combiner_data[combiner_nr].base = base;
- combiner_data[combiner_nr].irq_offset = irq_start;
- combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
-
- /* Disable all interrupts */
-
- __raw_writel(combiner_data[combiner_nr].irq_mask,
- base + COMBINER_ENABLE_CLEAR);
-
- /* Setup the Linux IRQ subsystem */
-
- for (i = irq_start; i < combiner_data[combiner_nr].irq_offset
- + MAX_IRQ_IN_COMBINER; i++) {
- irq_set_chip_and_handler(i, &combiner_chip, handle_level_irq);
- irq_set_chip_data(i, &combiner_data[combiner_nr]);
- set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
- }
-}