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
  24 void bcm63xx_machine_halt(void)
  25 {
  26         printk(KERN_INFO "System halted\n");
  27         while (1)
  28                 ;
  29 }
  30
  31 static void bcm6348_a1_reboot(void)
  32 {
  33         u32 reg;
  34
  35         /* soft reset all blocks */
  36         printk(KERN_INFO "soft-reseting 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
  64 void 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 BCM6338_CPU_ID:
  72                 perf_regs[0] = PERF_EXTIRQ_CFG_REG_6338;
  73                 break;
  74         case BCM6348_CPU_ID:
  75                 perf_regs[0] = PERF_EXTIRQ_CFG_REG_6348;
  76                 break;
  77         case BCM6358_CPU_ID:
  78                 perf_regs[0] = PERF_EXTIRQ_CFG_REG_6358;
  79                 break;
  80         }
  81
  82         for (i = 0; i < 2; i++) {
  83                 reg = bcm_perf_readl(perf_regs[i]);
  84                 if (BCMCPU_IS_6348()) {
  85                         reg &= ~EXTIRQ_CFG_MASK_ALL_6348;
  86                         reg |= EXTIRQ_CFG_CLEAR_ALL_6348;
  87                 } else {
  88                         reg &= ~EXTIRQ_CFG_MASK_ALL;
  89                         reg |= EXTIRQ_CFG_CLEAR_ALL;
  90                 }
  91                 bcm_perf_writel(reg, perf_regs[i]);
  92         }
  93
  94         if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
  95                 bcm6348_a1_reboot();
  96
  97         printk(KERN_INFO "triggering watchdog soft-reset...\n");
  98         reg = bcm_perf_readl(PERF_SYS_PLL_CTL_REG);
  99         reg |= SYS_PLL_SOFT_RESET;
 100         bcm_perf_writel(reg, PERF_SYS_PLL_CTL_REG);
 101         while (1)
 102                 ;
 103 }
 104
 105 static void __bcm63xx_machine_reboot(char *p)
 106 {
 107         bcm63xx_machine_reboot();
 108 }
 109
 110 /*
 111  * return system type in /proc/cpuinfo
 112  */
 113 const char *get_system_type(void)
 114 {
 115         static char buf[128];
 116         snprintf(buf, sizeof(buf), "bcm63xx/%s (0x%04x/0x%04X)",
 117                  board_get_name(),
 118                  bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
 119         return buf;
 120 }
 121
 122 void __init plat_time_init(void)
 123 {
 124         mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
 125 }
 126
 127 void __init plat_mem_setup(void)
 128 {
 129         add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);
 130
 131         _machine_halt = bcm63xx_machine_halt;
 132         _machine_restart = __bcm63xx_machine_reboot;
 133         pm_power_off = bcm63xx_machine_halt;
 134
 135         set_io_port_base(0);
 136         ioport_resource.start = 0;
 137         ioport_resource.end = ~0;
 138
 139         board_setup();
 140 }
 141
 142 int __init bcm63xx_register_devices(void)
 143 {
 144         return board_register_devices();
 145 }
 146
 147 device_initcall(bcm63xx_register_devices);