arch/arm/plat-s5pc1xx/irq.c

   1 /* arch/arm/plat-s5pc1xx/irq.c
   2  *
   3  * Copyright 2009 Samsung Electronics Co.
   4  *      Byungho Min <bhmin@samsung.com>
   5  *
   6  * S5PC1XX - Interrupt handling
   7  *
   8  * Based on plat-s3c64xx/irq.c
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/irq.h>
  18 #include <linux/io.h>
  19
  20 #include <asm/hardware/vic.h>
  21
  22 #include <mach/map.h>
  23 #include <plat/irq-vic-timer.h>
  24 #include <plat/irq-uart.h>
  25 #include <plat/cpu.h>
  26
  27 /* Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3]
  28  * are consecutive when looking up the interrupt in the demux routines.
  29  */
  30 static struct s3c_uart_irq uart_irqs[] = {
  31         [0] = {
  32                 .regs           = (void *)S3C_VA_UART0,
  33                 .base_irq       = IRQ_S3CUART_BASE0,
  34                 .parent_irq     = IRQ_UART0,
  35         },
  36         [1] = {
  37                 .regs           = (void *)S3C_VA_UART1,
  38                 .base_irq       = IRQ_S3CUART_BASE1,
  39                 .parent_irq     = IRQ_UART1,
  40         },
  41         [2] = {
  42                 .regs           = (void *)S3C_VA_UART2,
  43                 .base_irq       = IRQ_S3CUART_BASE2,
  44                 .parent_irq     = IRQ_UART2,
  45         },
  46         [3] = {
  47                 .regs           = (void *)S3C_VA_UART3,
  48                 .base_irq       = IRQ_S3CUART_BASE3,
  49                 .parent_irq     = IRQ_UART3,
  50         },
  51 };
  52
  53 void __init s5pc1xx_init_irq(u32 *vic_valid, int num)
  54 {
  55         int i;
  56
  57         printk(KERN_DEBUG "%s: initialising interrupts\n", __func__);
  58
  59         /* initialise the pair of VICs */
  60         for (i = 0; i < num; i++)
  61                 vic_init((void *)S5PC1XX_VA_VIC(i), S3C_IRQ(i * S3C_IRQ_OFFSET),
  62                                 vic_valid[i], 0);
  63
  64         /* add the timer sub-irqs */
  65
  66         s3c_init_vic_timer_irq(IRQ_TIMER0_VIC, IRQ_TIMER0);
  67         s3c_init_vic_timer_irq(IRQ_TIMER1_VIC, IRQ_TIMER1);
  68         s3c_init_vic_timer_irq(IRQ_TIMER2_VIC, IRQ_TIMER2);
  69         s3c_init_vic_timer_irq(IRQ_TIMER3_VIC, IRQ_TIMER3);
  70         s3c_init_vic_timer_irq(IRQ_TIMER4_VIC, IRQ_TIMER4);
  71
  72         s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs));
  73 }
  74
  75