arch/sh/boards/renesas/r7780rp/irq-r7780mp.c

   1 /*
   2  * Renesas Solutions Highlander R7780MP Support.
   3  *
   4  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
   5  * Copyright (C) 2006  Paul Mundt
   6  * Copyright (C) 2007  Magnus Damm
   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/io.h>
  15 #include <asm/r7780rp.h>
  16
  17 enum {
  18         UNUSED = 0,
  19
  20         /* board specific interrupt sources */
  21         AX88796,          /* Ethernet controller */
  22         CF,               /* Compact Flash */
  23         PSW,              /* Push Switch */
  24         EXT1,             /* EXT1n IRQ */
  25         EXT4,             /* EXT4n IRQ */
  26 };
  27
  28 static struct intc_vect vectors[] __initdata = {
  29         INTC_IRQ(CF, IRQ_CF),
  30         INTC_IRQ(PSW, IRQ_PSW),
  31         INTC_IRQ(AX88796, IRQ_AX88796),
  32         INTC_IRQ(EXT1, IRQ_EXT1),
  33         INTC_IRQ(EXT4, IRQ_EXT4),
  34 };
  35
  36 static struct intc_mask_reg mask_registers[] __initdata = {
  37         { 0xa4000000, 0, 16, /* IRLMSK */
  38           { 0, 0, 0, 0, CF, 0, 0, 0,
  39             0, 0, 0, EXT4, 0, EXT1, PSW, AX88796 } },
  40 };
  41
  42 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
  43         0, IRQ_CF, 0, 0,
  44         0, 0, 0, 0,
  45         0, IRQ_EXT4, 0, IRQ_EXT1,
  46         0, IRQ_AX88796, IRQ_PSW,
  47 };
  48
  49 static DECLARE_INTC_DESC(intc_desc, "r7780mp", vectors,
  50                          NULL, mask_registers, NULL, NULL);
  51
  52 unsigned char * __init highlander_init_irq_r7780mp(void)
  53 {
  54         if ((ctrl_inw(0xa4000700) & 0xf000) == 0x2000) {
  55                 printk(KERN_INFO "Using r7780mp interrupt controller.\n");
  56                 register_intc_controller(&intc_desc);
  57                 return irl2irq;
  58         }
  59
  60         return NULL;
  61 }