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
  24void bcm63xx_machine_halt(void)
  25{
  26        printk(KERN_INFO "System halted\n");
  27        while (1)
  28                ;
  29}
  30
  31static void bcm6348_a1_reboot(void)
  32{
  33        u32 reg;
  34
  35        /* soft reset all blocks */
  36        printk(KERN_INFO "soft-resetting all blocks ...\n");
  37        reg = bcm_perf_readl(PERF_SOFTRESET_REG);
  38        reg &= ~SOFTRESET_6348_ALL;
  39        bcm_perf_writel(reg, PERF_SOFTRESET_REG);
  40        mdelay(10);
  41
  42        reg = bcm_perf_readl(PERF_SOFTRESET_REG);
  43        reg |= SOFTRESET_6348_ALL;
  44        bcm_perf_writel(reg, PERF_SOFTRESET_REG);
  45        mdelay(10);
  46
  47        /* Jump to the power on address. */
  48        printk(KERN_INFO "jumping to reset vector.\n");
  49        /* set high vectors (base at 0xbfc00000 */
  50        set_c0_status(ST0_BEV | ST0_ERL);
  51        /* run uncached in kseg0 */
  52        change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  53        __flush_cache_all();
  54        /* remove all wired TLB entries */
  55        write_c0_wired(0);
  56        __asm__ __volatile__(
  57                "jr\t%0"
  58                :
  59                : "r" (0xbfc00000));
  60        while (1)
  61                ;
  62}
  63
  64void bcm63xx_machine_reboot(void)
  65{
  66        u32 reg, perf_regs[2] = { 0, 0 };
  67        unsigned int i;
  68
  69        /* mask and clear all external irq */
  70        switch (bcm63xx_get_cpu_id()) {
  71        case BCM6328_CPU_ID:
  72                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6328;
  73                break;
  74        case BCM6338_CPU_ID:
  75                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
  76                break;
  77        case BCM6345_CPU_ID:
  78                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6345;
  79                break;
  80        case BCM6348_CPU_ID:
  81                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
  82                break;
  83        case BCM6358_CPU_ID:
  84                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
  85                break;
  86        case BCM6362_CPU_ID:
  87                perf_regs[0] = PERF_EXTIRQ_CFG_REG_6362;
  88                break;
  89        }
  90
  91        for (i = 0; i < 2; i++) {
  92                if (!perf_regs[i])
  93                        break;
  94
  95                reg = bcm_perf_readl(perf_regs[i]);
  96                if (BCMCPU_IS_6348()) {
  97                        reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
  98                        reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
  99                } else {
 100                        reg &= ~EXTIRQ_CFG_MASK_ALL;
 101                        reg |= EXTIRQ_CFG_CLEAR_ALL;
 102                }
 103                bcm_perf_writel(reg, perf_regs[i]);
 104        }
 105
 106        if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
 107                bcm6348_a1_reboot();
 108
 109        printk(KERN_INFO "triggering watchdog soft-reset...\n");
 110        if (BCMCPU_IS_6328()) {
 111                bcm_wdt_writel(1, WDT_SOFTRESET_REG);
 112        } else {
 113                reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
 114                reg |= SYS_PLL_SOFT_RESET;
 115                bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
 116        }
 117        while (1)
 118                ;
 119}
 120
 121static void __bcm63xx_machine_reboot(char *p)
 122{
 123        bcm63xx_machine_reboot();
 124}
 125
 126/*
 127 * return system type in /proc/cpuinfo
 128 */
 129const char *get_system_type(void)
 130{
 131        static char buf[128];
 132        snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%02X)",
 133                 board_get_name(),
 134                 bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
 135        return buf;
 136}
 137
 138void __init plat_time_init(void)
 139{
 140        mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
 141}
 142
 143void __init plat_mem_setup(void)
 144{
 145        add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);
 146
 147        _machine_halt = bcm63xx_machine_halt;
 148        _machine_restart = __bcm63xx_machine_reboot;
 149        pm_power_off = bcm63xx_machine_halt;
 150
 151        set_io_port_base(0);
 152        ioport_resource.start = 0;
 153        ioport_resource.end = ~0;
 154
 155        board_setup();
 156}
 157
 158int __init bcm63xx_register_devices(void)
 159{
 160        return board_register_devices();
 161}
 162
 163arch_initcall(bcm63xx_register_devices);
 164