generic.c

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/*
 *  linux/arch/arm/mach-pxa/generic.c
 *
 *  Author: Nicolas Pitre
 *  Created:    Jun 15, 2001
 *  Copyright:  MontaVista Software Inc.
 *
 * Code common to all PXA machines.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Since this file should be linked before any other machine specific file,
 * the __initcall() here will be executed first.  This serves as default
 * initialization stuff for PXA machines which can be overridden later if
 * need be.
 */
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>

#include <mach/hardware.h>
#include <asm/mach/map.h>
#include <asm/mach-types.h>

#include <mach/reset.h>
#include <mach/smemc.h>
#include <mach/pxa3xx-regs.h>

#include "generic.h"

void clear_reset_status(unsigned int mask)
{
    if (cpu_is_pxa2xx())
        pxa2xx_clear_reset_status(mask);
    else {
        /* RESET_STATUS_* has a 1:1 mapping with ARSR */
        ARSR = mask;
    }
}

unsigned long get_clock_tick_rate(void)
{
    unsigned long clock_tick_rate;

    if (cpu_is_pxa25x())
        clock_tick_rate = 3686400;
    else if (machine_is_mainstone())
        clock_tick_rate = 3249600;
    else
        clock_tick_rate = 3250000;

    return clock_tick_rate;
}
EXPORT_SYMBOL(get_clock_tick_rate);

/*
 * Get the clock frequency as reflected by CCCR and the turbo flag.
 * We assume these values have been applied via a fcs.
 * If info is not 0 we also display the current settings.
 */
unsigned int get_clk_frequency_khz(int info)
{
    if (cpu_is_pxa25x())
        return pxa25x_get_clk_frequency_khz(info);
    else if (cpu_is_pxa27x())
        return pxa27x_get_clk_frequency_khz(info);
    return 0;
}
EXPORT_SYMBOL(get_clk_frequency_khz);

/*
 * Intel PXA2xx internal register mapping.
 *
 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
 *       and cache flush area.
 */
static struct map_desc common_io_desc[] __initdata = {
    {   /* Devs */
        .virtual    =  0xf2000000,
        .pfn        = __phys_to_pfn(0x40000000),
        .length     = 0x02000000,
        .type       = MT_DEVICE
    }, {    /* UNCACHED_PHYS_0 */
        .virtual    = 0xff000000,
        .pfn        = __phys_to_pfn(0x00000000),
        .length     = 0x00100000,
        .type       = MT_DEVICE
    }
};

void __init pxa_map_io(void)
{
    iotable_init(ARRAY_AND_SIZE(common_io_desc));
}