LXR linux/arch/mips/bcm63xx/setup.c

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   7 */
   8
   9#include <linux/init.h>
  10#include <linux/kernel.h>
  11#include <linux/delay.h>
  12#include <linux/bootmem.h>
  13#include <linux/ioport.h>
  14#include <linux/pm.h>
  15#include <asm/bootinfo.h>
  16#include <asm/time.h>
  17#include <asm/reboot.h>
  18#include <asm/cacheflush.h>
  19#include <bcm63xx_board.h>
  20#include <bcm63xx_cpu.h>
  21#include <bcm63xx_regs.h>
  22#include <bcm63xx_io.h>
  23#include <bcm63xx_gpio.h>
  24
  25void bcm63xx_machine_halt(void)
  26{
  27        pr_info("System halted\n");
  28        while (1)
  29                ;
  30}
  31
  32static void bcm6348_a1_reboot(void)
  33{
  34        u32 reg;
  35
  36        /* soft reset all blocks */
  37        pr_info("soft-resetting all blocks ...\n");
  38        reg = bcm_perf_readl(PERF_SOFTRESET_REG);
  39        reg &= ~SOFTRESET_6348_ALL;
  40        bcm_perf_writel(reg, PERF_SOFTRESET_REG);
  41        mdelay(10);
  42
  43        reg = bcm_perf_readl(PERF_SOFTRESET_REG);
  44        reg |= SOFTRESET_6348_ALL;
  45        bcm_perf_writel(reg, PERF_SOFTRESET_REG);
  46        mdelay(10);
  47
  48        /* Jump to the power on address. */
  49        pr_info("jumping to reset vector.\n");
  50        /* set high vectors (base at 0xbfc00000 */
  51        set_c0_status(ST0_BEV | ST0_ERL);
  52        /* run uncached in kseg0 */
  53        change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  54        __flush_cache_all();
  55        /* remove all wired TLB entries */
  56        write_c0_wired(0);
  57        __asm__ __volatile__(
  58                "jr\t%0"
  59                :
  60                : "r" (0xbfc00000));
  61        while (1)
  62                ;
  63}
  64
  65void bcm63xx_machine_reboot(void)
  66{
  67        u32 reg, perf_regs[2] = { 0, 0 };
  68        unsigned int i;
  69
  70        /* mask and clear all external irq */
  71        switch (bcm63xx_get_cpu_id()) {
  72        case BCM3368_CPU_ID:
  73                perf_regs[0] = PERF_EXTIRQ_CFG_REG_3368;
  74                break;
  75        case BCM6328_CPU_ID:
  76                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6328;
  77                break;
  78        case BCM6338_CPU_ID:
  79                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
  80                break;
  81        case BCM6345_CPU_ID:
  82                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6345;
  83                break;
  84        case BCM6348_CPU_ID:
  85                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
  86                break;
  87        case BCM6358_CPU_ID:
  88                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
  89                break;
  90        case BCM6362_CPU_ID:
  91                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6362;
  92                break;
  93        }
  94
  95        for (i = 0; i < 2; i++) {
  96                if (!perf_regs[i])
  97                        break;
  98
  99                reg = bcm_perf_readl(perf_regs[i]);
 100                if (BCMCPU_IS_6348()) {
 101                        reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
 102                        reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
 103                } else {
 104                        reg &= ~EXTIRQ_CFG_MASK_ALL;
 105                        reg |= EXTIRQ_CFG_CLEAR_ALL;
 106                }
 107                bcm_perf_writel(reg, perf_regs[i]);
 108        }
 109
 110        if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
 111                bcm6348_a1_reboot();
 112
 113        pr_info("triggering watchdog soft-reset...\n");
 114        if (BCMCPU_IS_6328()) {
 115                bcm_wdt_writel(1, WDT_SOFTRESET_REG);
 116        } else {
 117                reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
 118                reg |= SYS_PLL_SOFT_RESET;
 119                bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
 120        }
 121        while (1)
 122                ;
 123}
 124
 125static void __bcm63xx_machine_reboot(char *p)
 126{
 127        bcm63xx_machine_reboot();
 128}
 129
 130/*
 131 * return system type in /proc/cpuinfo
 132 */
 133const char *get_system_type(void)
 134{
 135        static char buf[128];
 136        snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%02X)",
 137                 board_get_name(),
 138                 bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
 139        return buf;
 140}
 141
 142void __init plat_time_init(void)
 143{
 144        mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
 145}
 146
 147void __init plat_mem_setup(void)
 148{
 149        add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);
 150
 151        _machine_halt = bcm63xx_machine_halt;
 152        _machine_restart = __bcm63xx_machine_reboot;
 153        pm_power_off = bcm63xx_machine_halt;
 154
 155        set_io_port_base(0);
 156        ioport_resource.start = 0;
 157        ioport_resource.end = ~0;
 158
 159        board_setup();
 160}
 161
 162int __init bcm63xx_register_devices(void)
 163{
 164        /* register gpiochip */
 165        bcm63xx_gpio_init();
 166
 167        return board_register_devices();
 168}
 169
 170arch_initcall(bcm63xx_register_devices);
 171