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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Renesas Solutions Highlander R7785RP Support.
   4  *
   5  * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
   6  * Copyright (C) 2006 - 2008  Paul Mundt
   7  * Copyright (C) 2007  Magnus Damm
   8  */
   9 #include <linux/init.h>
  10 #include <linux/irq.h>
  11 #include <linux/io.h>
  12 #include <mach/highlander.h>
  13
  14 enum {
  15         UNUSED = 0,
  16
  17         /* FPGA specific interrupt sources */
  18         CF,             /* Compact Flash */
  19         SMBUS,          /* SMBUS */
  20         TP,             /* Touch panel */
  21         RTC,            /* RTC Alarm */
  22         TH_ALERT,       /* Temperature sensor */
  23         AX88796,        /* Ethernet controller */
  24
  25         /* external bus connector */
  26         EXT0, EXT1, EXT2, EXT3, EXT4, EXT5, EXT6, EXT7,
  27 };
  28
  29 static struct intc_vect vectors[] __initdata = {
  30         INTC_IRQ(CF, IRQ_CF),
  31         INTC_IRQ(SMBUS, IRQ_SMBUS),
  32         INTC_IRQ(TP, IRQ_TP),
  33         INTC_IRQ(RTC, IRQ_RTC),
  34         INTC_IRQ(TH_ALERT, IRQ_TH_ALERT),
  35
  36         INTC_IRQ(EXT0, IRQ_EXT0), INTC_IRQ(EXT1, IRQ_EXT1),
  37         INTC_IRQ(EXT2, IRQ_EXT2), INTC_IRQ(EXT3, IRQ_EXT3),
  38
  39         INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
  40         INTC_IRQ(EXT6, IRQ_EXT6), INTC_IRQ(EXT7, IRQ_EXT7),
  41
  42         INTC_IRQ(AX88796, IRQ_AX88796),
  43 };
  44
  45 static struct intc_mask_reg mask_registers[] __initdata = {
  46         { 0xa4000010, 0, 16, /* IRLMCR1 */
  47           { 0, 0, 0, 0, CF, AX88796, SMBUS, TP,
  48             RTC, 0, TH_ALERT, 0, 0, 0, 0, 0 } },
  49         { 0xa4000012, 0, 16, /* IRLMCR2 */
  50           { 0, 0, 0, 0, 0, 0, 0, 0,
  51             EXT7, EXT6, EXT5, EXT4, EXT3, EXT2, EXT1, EXT0 } },
  52 };
  53
  54 static unsigned char irl2irq[HL_NR_IRL] __initdata = {
  55         0, IRQ_CF, IRQ_EXT4, IRQ_EXT5,
  56         IRQ_EXT6, IRQ_EXT7, IRQ_SMBUS, IRQ_TP,
  57         IRQ_RTC, IRQ_TH_ALERT, IRQ_AX88796, IRQ_EXT0,
  58         IRQ_EXT1, IRQ_EXT2, IRQ_EXT3,
  59 };
  60
  61 static DECLARE_INTC_DESC(intc_desc, "r7785rp", vectors,
  62                          NULL, mask_registers, NULL, NULL);
  63
  64 unsigned char * __init highlander_plat_irq_setup(void)
  65 {
  66         if ((__raw_readw(0xa4000158) & 0xf000) != 0x1000)
  67                 return NULL;
  68
  69         printk(KERN_INFO "Using r7785rp interrupt controller.\n");
  70
  71         __raw_writew(0x0000, PA_IRLSSR1);       /* FPGA IRLSSR1(CF_CD clear) */
  72
  73         /* Setup the FPGA IRL */
  74         __raw_writew(0x0000, PA_IRLPRA);        /* FPGA IRLA */
  75         __raw_writew(0xe598, PA_IRLPRB);        /* FPGA IRLB */
  76         __raw_writew(0x7060, PA_IRLPRC);        /* FPGA IRLC */
  77         __raw_writew(0x0000, PA_IRLPRD);        /* FPGA IRLD */
  78         __raw_writew(0x4321, PA_IRLPRE);        /* FPGA IRLE */
  79         __raw_writew(0xdcba, PA_IRLPRF);        /* FPGA IRLF */
  80
  81         register_intc_controller(&intc_desc);
  82         return irl2irq;
  83 }