release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-s5p/irq.c

   1 /* arch/arm/plat-s5p/irq.c
   2  *
   3  * Copyright (c) 2009 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * S5P - Interrupt handling
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/irq.h>
  16 #include <linux/io.h>
  17
  18 #include <asm/hardware/vic.h>
  19
  20 #include <linux/serial_core.h>
  21 #include <mach/map.h>
  22 #include <plat/regs-timer.h>
  23 #include <plat/regs-serial.h>
  24 #include <plat/cpu.h>
  25 #include <plat/irq-vic-timer.h>
  26 #include <plat/irq-uart.h>
  27
  28 /*
  29  * Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3]
  30  * are consecutive when looking up the interrupt in the demux routines.
  31  */
  32 static struct s3c_uart_irq uart_irqs[] = {
  33         [0] = {
  34                 .regs           = S5P_VA_UART0,
  35                 .base_irq       = IRQ_S5P_UART_BASE0,
  36                 .parent_irq     = IRQ_UART0,
  37         },
  38         [1] = {
  39                 .regs           = S5P_VA_UART1,
  40                 .base_irq       = IRQ_S5P_UART_BASE1,
  41                 .parent_irq     = IRQ_UART1,
  42         },
  43         [2] = {
  44                 .regs           = S5P_VA_UART2,
  45                 .base_irq       = IRQ_S5P_UART_BASE2,
  46                 .parent_irq     = IRQ_UART2,
  47         },
  48 #if CONFIG_SERIAL_SAMSUNG_UARTS > 3
  49         [3] = {
  50                 .regs           = S5P_VA_UART3,
  51                 .base_irq       = IRQ_S5P_UART_BASE3,
  52                 .parent_irq     = IRQ_UART3,
  53         },
  54 #endif
  55 };
  56
  57 void __init s5p_init_irq(u32 *vic, u32 num_vic)
  58 {
  59 #ifdef CONFIG_ARM_VIC
  60         int irq;
  61
  62         /* initialize the VICs */
  63         for (irq = 0; irq < num_vic; irq++)
  64                 vic_init(VA_VIC(irq), VIC_BASE(irq), vic[irq], 0);
  65 #endif
  66
  67         s3c_init_vic_timer_irq(IRQ_TIMER0_VIC, IRQ_TIMER0);
  68         s3c_init_vic_timer_irq(IRQ_TIMER1_VIC, IRQ_TIMER1);
  69         s3c_init_vic_timer_irq(IRQ_TIMER2_VIC, IRQ_TIMER2);
  70         s3c_init_vic_timer_irq(IRQ_TIMER3_VIC, IRQ_TIMER3);
  71         s3c_init_vic_timer_irq(IRQ_TIMER4_VIC, IRQ_TIMER4);
  72
  73         s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs));
  74 }