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84 lines
1.8 KiB
84 lines
1.8 KiB
/* |
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* arch/arm/mach-dove/irq.c |
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* |
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* Dove IRQ handling. |
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* |
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* This file is licensed under the terms of the GNU General Public |
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* License version 2. This program is licensed "as is" without any |
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* warranty of any kind, whether express or implied. |
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*/ |
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#include <linux/init.h> |
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#include <linux/irq.h> |
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#include <linux/io.h> |
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#include <asm/exception.h> |
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#include <plat/irq.h> |
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#include <plat/orion-gpio.h> |
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#include "pm.h" |
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#include "bridge-regs.h" |
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#include "common.h" |
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static int __initdata gpio0_irqs[4] = { |
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IRQ_DOVE_GPIO_0_7, |
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IRQ_DOVE_GPIO_8_15, |
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IRQ_DOVE_GPIO_16_23, |
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IRQ_DOVE_GPIO_24_31, |
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}; |
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static int __initdata gpio1_irqs[4] = { |
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IRQ_DOVE_HIGH_GPIO, |
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0, |
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0, |
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0, |
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}; |
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static int __initdata gpio2_irqs[4] = { |
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0, |
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0, |
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0, |
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0, |
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}; |
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static void __iomem *dove_irq_base = IRQ_VIRT_BASE; |
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static asmlinkage void |
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__exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs) |
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{ |
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u32 stat; |
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stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF); |
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stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF); |
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if (stat) { |
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unsigned int hwirq = 1 + __fls(stat); |
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handle_IRQ(hwirq, regs); |
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return; |
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} |
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stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF); |
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stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF); |
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if (stat) { |
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unsigned int hwirq = 33 + __fls(stat); |
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handle_IRQ(hwirq, regs); |
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return; |
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} |
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} |
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void __init dove_init_irq(void) |
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{ |
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orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF); |
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orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF); |
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set_handle_irq(dove_legacy_handle_irq); |
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/* |
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* Initialize gpiolib for GPIOs 0-71. |
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*/ |
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orion_gpio_init(NULL, 0, 32, DOVE_GPIO_LO_VIRT_BASE, 0, |
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IRQ_DOVE_GPIO_START, gpio0_irqs); |
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orion_gpio_init(NULL, 32, 32, DOVE_GPIO_HI_VIRT_BASE, 0, |
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IRQ_DOVE_GPIO_START + 32, gpio1_irqs); |
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orion_gpio_init(NULL, 64, 8, DOVE_GPIO2_VIRT_BASE, 0, |
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IRQ_DOVE_GPIO_START + 64, gpio2_irqs); |
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}
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