arch/sh/boards/mach-highlander/irq-r7785rp.c

   1 /*
   2  * Renesas Solutions Highlander R7785RP Support.
   3  *
   4  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
   5  * Copyright (C) 2006 - 2008  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         /* FPGA specific interrupt sources */
  21         CF,             /* Compact Flash */
  22         SMBUS,          /* SMBUS */
  23         TP,             /* Touch panel */
  24         RTC,            /* RTC Alarm */
  25         TH_ALERT,       /* Temperature sensor */
  26         AX88796,        /* Ethernet controller */
  27
  28         /* external bus connector */
  29         EXT0, EXT1, EXT2, EXT3, EXT4, EXT5, EXT6, EXT7,
  30 };
  31
  32 static struct intc_vect vectors[] __initdata = {
  33         INTC_IRQ(CF, IRQ_CF),
  34         INTC_IRQ(SMBUS, IRQ_SMBUS),
  35         INTC_IRQ(TP, IRQ_TP),
  36         INTC_IRQ(RTC, IRQ_RTC),
  37         INTC_IRQ(TH_ALERT, IRQ_TH_ALERT),
  38
  39         INTC_IRQ(EXT0, IRQ_EXT0), INTC_IRQ(EXT1, IRQ_EXT1),
  40         INTC_IRQ(EXT2, IRQ_EXT2), INTC_IRQ(EXT3, IRQ_EXT3),
  41
  42         INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
  43         INTC_IRQ(EXT6, IRQ_EXT6), INTC_IRQ(EXT7, IRQ_EXT7),
  44
  45         INTC_IRQ(AX88796, IRQ_AX88796),
  46 };
  47
  48 static struct intc_mask_reg mask_registers[] __initdata = {
  49         { 0xa4000010, 0, 16, /* IRLMCR1 */
  50           { 0, 0, 0, 0, CF, AX88796, SMBUS, TP,
  51             RTC, 0, TH_ALERT, 0, 0, 0, 0, 0 } },
  52         { 0xa4000012, 0, 16, /* IRLMCR2 */
  53           { 0, 0, 0, 0, 0, 0, 0, 0,
  54             EXT7, EXT6, EXT5, EXT4, EXT3, EXT2, EXT1, EXT0 } },
  55 };
  56
  57 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
  58         0, IRQ_CF, IRQ_EXT4, IRQ_EXT5,
  59         IRQ_EXT6, IRQ_EXT7, IRQ_SMBUS, IRQ_TP,
  60         IRQ_RTC, IRQ_TH_ALERT, IRQ_AX88796, IRQ_EXT0,
  61         IRQ_EXT1, IRQ_EXT2, IRQ_EXT3,
  62 };
  63
  64 static DECLARE_INTC_DESC(intc_desc, "r7785rp", vectors,
  65                          NULL, mask_registers, NULL, NULL);
  66
  67 unsigned char * __init highlander_plat_irq_setup(void)
  68 {
  69         if ((__raw_readw(0xa4000158) & 0xf000) != 0x1000)
  70                 return NULL;
  71
  72         printk(KERN_INFO "Using r7785rp interrupt controller.\n");
  73
  74         __raw_writew(0x0000, PA_IRLSSR1);       /* FPGA IRLSSR1(CF_CD clear) */
  75
  76         /* Setup the FPGA IRL */
  77         __raw_writew(0x0000, PA_IRLPRA);        /* FPGA IRLA */
  78         __raw_writew(0xe598, PA_IRLPRB);        /* FPGA IRLB */
  79         __raw_writew(0x7060, PA_IRLPRC);        /* FPGA IRLC */
  80         __raw_writew(0x0000, PA_IRLPRD);        /* FPGA IRLD */
  81         __raw_writew(0x4321, PA_IRLPRE);        /* FPGA IRLE */
  82         __raw_writew(0xdcba, PA_IRLPRF);        /* FPGA IRLF */
  83
  84         register_intc_controller(&intc_desc);
  85         return irl2irq;
  86 }