arch/sh/boards/se/7780/irq.c

   1 /*
   2  * linux/arch/sh/boards/se/7780/irq.c
   3  *
   4  * Copyright (C) 2006,2007  Nobuhiro Iwamatsu
   5  *
   6  * Hitachi UL SolutionEngine 7780 Support.
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file "COPYING" in the main directory of this archive
  10  * for more details.
  11  */
  12 #include <linux/init.h>
  13 #include <linux/irq.h>
  14 #include <linux/interrupt.h>
  15 #include <asm/irq.h>
  16 #include <asm/io.h>
  17 #include <asm/se7780.h>
  18
  19 /*
  20  * Initialize IRQ setting
  21  */
  22 void __init init_se7780_IRQ(void)
  23 {
  24         /* enable all interrupt at FPGA */
  25         ctrl_outw(0, FPGA_INTMSK1);
  26         /* mask SM501 interrupt */
  27         ctrl_outw((ctrl_inw(FPGA_INTMSK1) | 0x0002), FPGA_INTMSK1);
  28         /* enable all interrupt at FPGA */
  29         ctrl_outw(0, FPGA_INTMSK2);
  30
  31         /* set FPGA INTSEL register */
  32         /* FPGA + 0x06 */
  33         ctrl_outw( ((IRQPIN_SM501 << IRQPOS_SM501) |
  34                 (IRQPIN_SMC91CX << IRQPOS_SMC91CX)), FPGA_INTSEL1);
  35
  36         /* FPGA + 0x08 */
  37         ctrl_outw(((IRQPIN_EXTINT4 << IRQPOS_EXTINT4) |
  38                 (IRQPIN_EXTINT3 << IRQPOS_EXTINT3) |
  39                 (IRQPIN_EXTINT2 << IRQPOS_EXTINT2) |
  40                 (IRQPIN_EXTINT1 << IRQPOS_EXTINT1)), FPGA_INTSEL2);
  41
  42         /* FPGA + 0x0A */
  43         ctrl_outw((IRQPIN_PCCPW << IRQPOS_PCCPW), FPGA_INTSEL3);
  44
  45         plat_irq_setup_pins(IRQ_MODE_IRQ); /* install handlers for IRQ0-7 */
  46 }