at91x40.c

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/*
 * arch/arm/mach-at91/at91x40.c
 *
 * (C) Copyright 2007, Greg Ungerer <[email protected]>
 * Copyright (C) 2005 SAN People
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/proc-fns.h>
#include <asm/system_misc.h>
#include <asm/mach/arch.h>
#include <mach/at91x40.h>
#include <mach/at91_aic.h>
#include <mach/at91_st.h>
#include <mach/timex.h>
#include "generic.h"

/*
 * Export the clock functions for the AT91X40. Some external code common
 * to all AT91 family parts relys on this, like the gpio and serial support.
 */
int clk_enable(struct clk *clk)
{
    return 0;
}

void clk_disable(struct clk *clk)
{
}

unsigned long clk_get_rate(struct clk *clk)
{
    return AT91X40_MASTER_CLOCK;
}

static void at91x40_idle(void)
{
    /*
     * Disable the processor clock.  The processor will be automatically
     * re-enabled by an interrupt or by a reset.
     */
    __raw_writel(AT91_PS_CR_CPU, AT91_IO_P2V(AT91_PS_CR));
    cpu_do_idle();
}

void __init at91x40_initialize(unsigned long main_clock)
{
    arm_pm_idle = at91x40_idle;
    at91_extern_irq = (1 << AT91X40_ID_IRQ0) | (1 << AT91X40_ID_IRQ1)
            | (1 << AT91X40_ID_IRQ2);
}

/*
 * The default interrupt priority levels (0 = lowest, 7 = highest).
 */
static unsigned int at91x40_default_irq_priority[NR_AIC_IRQS] __initdata = {
    7,  /* Advanced Interrupt Controller (FIQ) */
    0,  /* System Peripherals */
    0,  /* USART 0 */
    0,  /* USART 1 */
    2,  /* Timer Counter 0 */
    2,  /* Timer Counter 1 */
    2,  /* Timer Counter 2 */
    0,  /* Watchdog timer */
    0,  /* Parallel IO Controller A */
    0,  /* Reserved */
    0,  /* Reserved */
    0,  /* Reserved */
    0,  /* Reserved */
    0,  /* Reserved */
    0,  /* Reserved */
    0,  /* Reserved */
    0,  /* External IRQ0 */
    0,  /* External IRQ1 */
    0,  /* External IRQ2 */
};

void __init at91x40_init_interrupts(unsigned int priority[NR_AIC_IRQS])
{
    if (!priority)
        priority = at91x40_default_irq_priority;

    at91_aic_init(priority, at91_extern_irq);
}