setup.c

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/*
 * 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.
 *
 * Copyright (C) 2008 Maxime Bizon <[email protected]>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/bootmem.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/reboot.h>
#include <asm/cacheflush.h>
#include <bcm63xx_board.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_regs.h>
#include <bcm63xx_io.h>

void bcm63xx_machine_halt(void)
{
    printk(KERN_INFO "System halted\n");
    while (1)
        ;
}

static void bcm6348_a1_reboot(void)
{
    u32 reg;

    /* soft reset all blocks */
    printk(KERN_INFO "soft-resetting all blocks ...\n");
    reg = bcm_perf_readl(PERF_SOFTRESET_REG);
    reg &= ~SOFTRESET_6348_ALL;
    bcm_perf_writel(reg, PERF_SOFTRESET_REG);
    mdelay(10);

    reg = bcm_perf_readl(PERF_SOFTRESET_REG);
    reg |= SOFTRESET_6348_ALL;
    bcm_perf_writel(reg, PERF_SOFTRESET_REG);
    mdelay(10);

    /* Jump to the power on address. */
    printk(KERN_INFO "jumping to reset vector.\n");
    /* set high vectors (base at 0xbfc00000 */
    set_c0_status(ST0_BEV | ST0_ERL);
    /* run uncached in kseg0 */
    change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
    __flush_cache_all();
    /* remove all wired TLB entries */
    write_c0_wired(0);
    __asm__ __volatile__(
        "jr\t%0"
        :
        : "r" (0xbfc00000));
    while (1)
        ;
}

void bcm63xx_machine_reboot(void)
{
    u32 reg, perf_regs[2] = { 0, 0 };
    unsigned int i;

    /* mask and clear all external irq */
    switch (bcm63xx_get_cpu_id()) {
    case BCM6328_CPU_ID:
        perf_regs[0] = PERF_EXTIRQ_CFG_REG_6328;
        break;
    case BCM6338_CPU_ID:
        perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
        break;
    case BCM6345_CPU_ID:
        perf_regs[0] = PERF_EXTIRQ_CFG_REG_6345;
        break;
    case BCM6348_CPU_ID:
        perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
        break;
    case BCM6358_CPU_ID:
        perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
        break;
    }

    for (i = 0; i < 2; i++) {
        if (!perf_regs[i])
            break;

        reg = bcm_perf_readl(perf_regs[i]);
        if (BCMCPU_IS_6348()) {
            reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
            reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
        } else {
            reg &= ~EXTIRQ_CFG_MASK_ALL;
            reg |= EXTIRQ_CFG_CLEAR_ALL;
        }
        bcm_perf_writel(reg, perf_regs[i]);
    }

    if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
        bcm6348_a1_reboot();

    printk(KERN_INFO "triggering watchdog soft-reset...\n");
    if (BCMCPU_IS_6328()) {
        bcm_wdt_writel(1, WDT_SOFTRESET_REG);
    } else {
        reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
        reg |= SYS_PLL_SOFT_RESET;
        bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
    }
    while (1)
        ;
}

static void __bcm63xx_machine_reboot(char *p)
{
    bcm63xx_machine_reboot();
}

/*
 * return system type in /proc/cpuinfo
 */
const char *get_system_type(void)
{
    static char buf[128];
    snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%04X)",
         board_get_name(),
         bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
    return buf;
}

void __init plat_time_init(void)
{
    mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
}

void __init plat_mem_setup(void)
{
    add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);

    _machine_halt = bcm63xx_machine_halt;
    _machine_restart = __bcm63xx_machine_reboot;
    pm_power_off = bcm63xx_machine_halt;

    set_io_port_base(0);
    ioport_resource.start = 0;
    ioport_resource.end = ~0;

    board_setup();
}

int __init bcm63xx_register_devices(void)
{
    return board_register_devices();
}

device_initcall(bcm63xx_register_devices);