board-xxs1500.c

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/*
 * BRIEF MODULE DESCRIPTION
 *  MyCable XXS1500 board support
 *
 * Copyright 2003, 2008 MontaVista Software Inc.
 * Author: MontaVista Software, Inc. <[email protected]>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/mach-au1x00/au1000.h>
#include <prom.h>

const char *get_system_type(void)
{
    return "XXS1500";
}

void __init prom_init(void)
{
    unsigned char *memsize_str;
    unsigned long memsize;

    prom_argc = fw_arg0;
    prom_argv = (char **)fw_arg1;
    prom_envp = (char **)fw_arg2;

    prom_init_cmdline();

    memsize_str = prom_getenv("memsize");
    if (!memsize_str || strict_strtoul(memsize_str, 0, &memsize))
        memsize = 0x04000000;

    add_memory_region(0, memsize, BOOT_MEM_RAM);
}

void prom_putchar(unsigned char c)
{
    alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
}

static void xxs1500_reset(char *c)
{
    /* Jump to the reset vector */
    __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
}

static void xxs1500_power_off(void)
{
    while (1)
        asm volatile (
        "   .set    mips32                  \n"
        "   wait                        \n"
        "   .set    mips0                   \n");
}

void __init board_setup(void)
{
    u32 pin_func;

    pm_power_off = xxs1500_power_off;
    _machine_halt = xxs1500_power_off;
    _machine_restart = xxs1500_reset;

    alchemy_gpio1_input_enable();
    alchemy_gpio2_enable();

    /* Set multiple use pins (UART3/GPIO) to UART (it's used as UART too) */
    pin_func  = au_readl(SYS_PINFUNC) & ~SYS_PF_UR3;
    pin_func |= SYS_PF_UR3;
    au_writel(pin_func, SYS_PINFUNC);

    /* Enable UART */
    alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
    /* Enable DTR (MCR bit 0) = USB power up */
    __raw_writel(1, (void __iomem *)KSEG1ADDR(AU1000_UART3_PHYS_ADDR + 0x18));
    wmb();
}

/******************************************************************************/

static struct resource xxs1500_pcmcia_res[] = {
    {
        .name   = "pcmcia-io",
        .flags  = IORESOURCE_MEM,
        .start  = AU1000_PCMCIA_IO_PHYS_ADDR,
        .end    = AU1000_PCMCIA_IO_PHYS_ADDR + 0x000400000 - 1,
    },
    {
        .name   = "pcmcia-attr",
        .flags  = IORESOURCE_MEM,
        .start  = AU1000_PCMCIA_ATTR_PHYS_ADDR,
        .end    = AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
    },
    {
        .name   = "pcmcia-mem",
        .flags  = IORESOURCE_MEM,
        .start  = AU1000_PCMCIA_MEM_PHYS_ADDR,
        .end    = AU1000_PCMCIA_MEM_PHYS_ADDR + 0x000400000 - 1,
    },
};

static struct platform_device xxs1500_pcmcia_dev = {
    .name       = "xxs1500_pcmcia",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(xxs1500_pcmcia_res),
    .resource   = xxs1500_pcmcia_res,
};

static struct platform_device *xxs1500_devs[] __initdata = {
    &xxs1500_pcmcia_dev,
};

static int __init xxs1500_dev_init(void)
{
    irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
    irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO207_INT, IRQ_TYPE_LEVEL_LOW);

    irq_set_irq_type(AU1500_GPIO0_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO1_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO2_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO3_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO4_INT, IRQ_TYPE_LEVEL_LOW); /* CF irq */
    irq_set_irq_type(AU1500_GPIO5_INT, IRQ_TYPE_LEVEL_LOW);

    return platform_add_devices(xxs1500_devs,
                    ARRAY_SIZE(xxs1500_devs));
}
device_initcall(xxs1500_dev_init);