irq.c

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/*
 * SDK7786 FPGA IRQ Controller Support.
 *
 * Copyright (C) 2010  Matt Fleming
 * Copyright (C) 2010  Paul Mundt
 *
 * 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/irq.h>
#include <mach/fpga.h>
#include <mach/irq.h>

enum {
    ATA_IRQ_BIT     = 1,
    SPI_BUSY_BIT        = 2,
    LIRQ5_BIT       = 3,
    LIRQ6_BIT       = 4,
    LIRQ7_BIT       = 5,
    LIRQ8_BIT       = 6,
    KEY_IRQ_BIT     = 7,
    PEN_IRQ_BIT     = 8,
    ETH_IRQ_BIT     = 9,
    RTC_ALARM_BIT       = 10,
    CRYSTAL_FAIL_BIT    = 12,
    ETH_PME_BIT     = 14,
};

void __init sdk7786_init_irq(void)
{
    unsigned int tmp;

    /* Enable priority encoding for all IRLs */
    fpga_write_reg(fpga_read_reg(INTMSR) | 0x0303, INTMSR);

    /* Clear FPGA interrupt status registers */
    fpga_write_reg(0x0000, INTASR);
    fpga_write_reg(0x0000, INTBSR);

    /* Unmask FPGA interrupts */
    tmp = fpga_read_reg(INTAMR);
    tmp &= ~(1 << ETH_IRQ_BIT);
    fpga_write_reg(tmp, INTAMR);

    plat_irq_setup_pins(IRQ_MODE_IRL7654_MASK);
    plat_irq_setup_pins(IRQ_MODE_IRL3210_MASK);
}