kernel/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
  25 void bcm63xx_machine_halt(void)
  26 {
  27         printk(KERN_INFO "System halted\n");
  28         while (1)
  29                 ;
  30 }
  31
  32 static void bcm6348_a1_reboot(void)
  33 {
  34         u32 reg;
  35
  36         /* soft reset all blocks */
  37         printk(KERN_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         printk(KERN_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
  65 void 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         printk(KERN_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
 125 static void __bcm63xx_machine_reboot(char *p)
 126 {
 127         bcm63xx_machine_reboot();
 128 }
 129
 130 /*
 131  * return system type in /proc/cpuinfo
 132  */
 133 const 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
 142 void __init plat_time_init(void)
 143 {
 144         mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
 145 }
 146
 147 void __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
 162 int __init bcm63xx_register_devices(void)
 163 {
 164         /* register gpiochip */
 165         bcm63xx_gpio_init();
 166
 167         return board_register_devices();
 168 }
 169
 170 arch_initcall(bcm63xx_register_devices);