release/src-rt-6.x.4708/linux/linux-2.6.36/arch/sh/boards/mach-highlander/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 <mach/highlander.h>
  16
  17 enum {
  18         UNUSED = 0,
  19
  20         /* board specific interrupt sources */
  21         CF,             /* Compact Flash */
  22         TP,             /* Touch panel */
  23         SCIF1,          /* FPGA SCIF1 */
  24         SCIF0,          /* FPGA SCIF0 */
  25         SMBUS,          /* SMBUS */
  26         RTC,            /* RTC Alarm */
  27         AX88796,        /* Ethernet controller */
  28         PSW,            /* Push Switch */
  29
  30         /* external bus connector */
  31         EXT1, EXT2, EXT4, EXT5, EXT6,
  32 };
  33
  34 static struct intc_vect vectors[] __initdata = {
  35         INTC_IRQ(CF, IRQ_CF),
  36         INTC_IRQ(TP, IRQ_TP),
  37         INTC_IRQ(SCIF1, IRQ_SCIF1),
  38         INTC_IRQ(SCIF0, IRQ_SCIF0),
  39         INTC_IRQ(SMBUS, IRQ_SMBUS),
  40         INTC_IRQ(RTC, IRQ_RTC),
  41         INTC_IRQ(AX88796, IRQ_AX88796),
  42         INTC_IRQ(PSW, IRQ_PSW),
  43
  44         INTC_IRQ(EXT1, IRQ_EXT1), INTC_IRQ(EXT2, IRQ_EXT2),
  45         INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
  46         INTC_IRQ(EXT6, IRQ_EXT6),
  47 };
  48
  49 static struct intc_mask_reg mask_registers[] __initdata = {
  50         { 0xa4000000, 0, 16, /* IRLMSK */
  51           { SCIF0, SCIF1, RTC, 0, CF, 0, TP, SMBUS,
  52             0, EXT6, EXT5, EXT4, EXT2, EXT1, PSW, AX88796 } },
  53 };
  54
  55 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
  56         0, IRQ_CF, IRQ_TP, IRQ_SCIF1,
  57         IRQ_SCIF0, IRQ_SMBUS, IRQ_RTC, IRQ_EXT6,
  58         IRQ_EXT5, IRQ_EXT4, IRQ_EXT2, IRQ_EXT1,
  59         0, IRQ_AX88796, IRQ_PSW,
  60 };
  61
  62 static DECLARE_INTC_DESC(intc_desc, "r7780mp", vectors,
  63                          NULL, mask_registers, NULL, NULL);
  64
  65 unsigned char * __init highlander_plat_irq_setup(void)
  66 {
  67         if ((__raw_readw(0xa4000700) & 0xf000) == 0x2000) {
  68                 printk(KERN_INFO "Using r7780mp interrupt controller.\n");
  69                 register_intc_controller(&intc_desc);
  70                 return irl2irq;
  71         }
  72
  73         return NULL;
  74 }