release/src-rt-6.x.4708/linux/linux-2.6.36/arch/sh/boards/mach-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 <linux/io.h>
  16 #include <mach-se/mach/se7780.h>
  17
  18 #define INTC_BASE       0xffd00000
  19 #define INTC_ICR1       (INTC_BASE+0x1c)
  20
  21 /*
  22  * Initialize IRQ setting
  23  */
  24 void __init init_se7780_IRQ(void)
  25 {
  26         /* enable all interrupt at FPGA */
  27         __raw_writew(0, FPGA_INTMSK1);
  28         /* mask SM501 interrupt */
  29         __raw_writew((__raw_readw(FPGA_INTMSK1) | 0x0002), FPGA_INTMSK1);
  30         /* enable all interrupt at FPGA */
  31         __raw_writew(0, FPGA_INTMSK2);
  32
  33         /* set FPGA INTSEL register */
  34         /* FPGA + 0x06 */
  35         __raw_writew( ((IRQPIN_SM501 << IRQPOS_SM501) |
  36                 (IRQPIN_SMC91CX << IRQPOS_SMC91CX)), FPGA_INTSEL1);
  37
  38         /* FPGA + 0x08 */
  39         __raw_writew(((IRQPIN_EXTINT4 << IRQPOS_EXTINT4) |
  40                 (IRQPIN_EXTINT3 << IRQPOS_EXTINT3) |
  41                 (IRQPIN_EXTINT2 << IRQPOS_EXTINT2) |
  42                 (IRQPIN_EXTINT1 << IRQPOS_EXTINT1)), FPGA_INTSEL2);
  43
  44         /* FPGA + 0x0A */
  45         __raw_writew((IRQPIN_PCCPW << IRQPOS_PCCPW), FPGA_INTSEL3);
  46
  47         plat_irq_setup_pins(IRQ_MODE_IRQ); /* install handlers for IRQ0-7 */
  48
  49         /* ICR1: detect low level(for 2ndcut) */
  50         __raw_writel(0xAAAA0000, INTC_ICR1);
  51
  52         /*
  53          * FPGA PCISEL register initialize
  54          *
  55          *  CPU  || SLOT1 | SLOT2 | S-ATA | USB
  56          *  -------------------------------------
  57          *  INTA || INTA  | INTD  |  --   | INTB
  58          *  -------------------------------------
  59          *  INTB || INTB  | INTA  |  --   | INTC
  60          *  -------------------------------------
  61          *  INTC || INTC  | INTB  | INTA  |  --
  62          *  -------------------------------------
  63          *  INTD || INTD  | INTC  |  --   | INTA
  64          *  -------------------------------------
  65          */
  66         __raw_writew(0x0013, FPGA_PCI_INTSEL1);
  67         __raw_writew(0xE402, FPGA_PCI_INTSEL2);
  68 }