irq-r7785rp.c

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/*
 * Renesas Solutions Highlander R7785RP Support.
 *
 * Copyright (C) 2002  Atom Create Engineering Co., Ltd.
 * Copyright (C) 2006 - 2008  Paul Mundt
 * Copyright (C) 2007  Magnus Damm
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/highlander.h>

enum {
    UNUSED = 0,

    /* FPGA specific interrupt sources */
    CF,     /* Compact Flash */
    SMBUS,      /* SMBUS */
    TP,     /* Touch panel */
    RTC,        /* RTC Alarm */
    TH_ALERT,   /* Temperature sensor */
    AX88796,    /* Ethernet controller */

    /* external bus connector */
    EXT0, EXT1, EXT2, EXT3, EXT4, EXT5, EXT6, EXT7,
};

static struct intc_vect vectors[] __initdata = {
    INTC_IRQ(CF, IRQ_CF),
    INTC_IRQ(SMBUS, IRQ_SMBUS),
    INTC_IRQ(TP, IRQ_TP),
    INTC_IRQ(RTC, IRQ_RTC),
    INTC_IRQ(TH_ALERT, IRQ_TH_ALERT),

    INTC_IRQ(EXT0, IRQ_EXT0), INTC_IRQ(EXT1, IRQ_EXT1),
    INTC_IRQ(EXT2, IRQ_EXT2), INTC_IRQ(EXT3, IRQ_EXT3),

    INTC_IRQ(EXT4, IRQ_EXT4), INTC_IRQ(EXT5, IRQ_EXT5),
    INTC_IRQ(EXT6, IRQ_EXT6), INTC_IRQ(EXT7, IRQ_EXT7),

    INTC_IRQ(AX88796, IRQ_AX88796),
};

static struct intc_mask_reg mask_registers[] __initdata = {
    { 0xa4000010, 0, 16, /* IRLMCR1 */
      { 0, 0, 0, 0, CF, AX88796, SMBUS, TP,
        RTC, 0, TH_ALERT, 0, 0, 0, 0, 0 } },
    { 0xa4000012, 0, 16, /* IRLMCR2 */
      { 0, 0, 0, 0, 0, 0, 0, 0,
        EXT7, EXT6, EXT5, EXT4, EXT3, EXT2, EXT1, EXT0 } },
};

static unsigned char irl2irq[HL_NR_IRL] __initdata = {
    0, IRQ_CF, IRQ_EXT4, IRQ_EXT5,
    IRQ_EXT6, IRQ_EXT7, IRQ_SMBUS, IRQ_TP,
    IRQ_RTC, IRQ_TH_ALERT, IRQ_AX88796, IRQ_EXT0,
    IRQ_EXT1, IRQ_EXT2, IRQ_EXT3,
};

static DECLARE_INTC_DESC(intc_desc, "r7785rp", vectors,
             NULL, mask_registers, NULL, NULL);

unsigned char * __init highlander_plat_irq_setup(void)
{
    if ((__raw_readw(0xa4000158) & 0xf000) != 0x1000)
        return NULL;

    printk(KERN_INFO "Using r7785rp interrupt controller.\n");

    __raw_writew(0x0000, PA_IRLSSR1);   /* FPGA IRLSSR1(CF_CD clear) */

    /* Setup the FPGA IRL */
    __raw_writew(0x0000, PA_IRLPRA);    /* FPGA IRLA */
    __raw_writew(0xe598, PA_IRLPRB);    /* FPGA IRLB */
    __raw_writew(0x7060, PA_IRLPRC);    /* FPGA IRLC */
    __raw_writew(0x0000, PA_IRLPRD);    /* FPGA IRLD */
    __raw_writew(0x4321, PA_IRLPRE);    /* FPGA IRLE */
    __raw_writew(0xdcba, PA_IRLPRF);    /* FPGA IRLF */

    register_intc_controller(&intc_desc);
    return irl2irq;
}