target/linux/adm5120-2.6/files/arch/mips/adm5120/setup.c

   1 /*
   2  *      Copyright (C) ADMtek Incorporated.
   3  *              Creator : daniell@admtek.com.tw
   4  *      Copyright 1999, 2000 MIPS Technologies, Inc.
   5  *      Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005
   6  */
   7
   8 #include <linux/autoconf.h>
   9 #include <linux/init.h>
  10 #include <linux/device.h>
  11 #include <linux/platform_device.h>
  12
  13 #include <asm/reboot.h>
  14 #include <asm/io.h>
  15 #include <asm/time.h>
  16
  17 #define ADM5120_SOFTRESET       0x12000004
  18 #define STATUS_IE               0x00000001
  19 #define ALLINTS (IE_IRQ0 | IE_IRQ5 | STATUS_IE)
  20
  21 #define ADM5120_CODEREG         0x12000000
  22 #define ADM5120_CPU_CLK_MASK    0x00300000
  23 #define ADM5120_CPU_CLK_175     0x00000000
  24 #define ADM5120_CPU_CLK_200     0x00100000
  25 #define ADM5120_CPU_CLK_225     0x00200000
  26 #define ADM5120_CPU_CLK_250     0x00300000
  27
  28 void  mips_time_init(void);
  29
  30 extern unsigned int mips_counter_frequency;
  31
  32 void adm5120_restart(char *command)
  33 {
  34         *(u32*)KSEG1ADDR(ADM5120_SOFTRESET)=1;
  35 }
  36
  37
  38 void adm5120_halt(void)
  39 {
  40         printk(KERN_NOTICE "\n** You can safely turn off the power\n");
  41         while (1);
  42 }
  43
  44
  45 void adm5120_power_off(void)
  46 {
  47         adm5120_halt();
  48 }
  49
  50 void __init mips_time_init(void)
  51 {
  52         u32 clock;
  53
  54         clock = *(u32*)KSEG1ADDR(ADM5120_CODEREG);
  55
  56         switch (clock & ADM5120_CPU_CLK_MASK) {
  57                 case ADM5120_CPU_CLK_175:
  58                         mips_counter_frequency = 87500000;
  59                         printk("CPU clock: 175MHz\n");
  60                         break;
  61                 case ADM5120_CPU_CLK_200:
  62                         mips_counter_frequency = 100000000;
  63                         printk("CPU clock: 200MHz\n");
  64                         break;
  65                 case ADM5120_CPU_CLK_225:
  66                         mips_counter_frequency = 112500000;
  67                         printk("CPU clock: 225MHz\n");
  68                         break;
  69                 case ADM5120_CPU_CLK_250:
  70                         mips_counter_frequency = 125000000;
  71                         printk("CPU clock: 250MHz\n");
  72                         break;
  73         }
  74 }
  75
  76 void __init plat_timer_setup(struct irqaction *irq)
  77 {
  78         /* to generate the first timer interrupt */
  79         write_c0_compare(read_c0_count()+ mips_counter_frequency/HZ);
  80         clear_c0_status(ST0_BEV);
  81         set_c0_status(ALLINTS);
  82 }
  83
  84 void __init plat_mem_setup(void)
  85 {
  86         printk(KERN_INFO "ADM5120 board setup\n");
  87
  88         board_time_init = mips_time_init;
  89         //board_timer_setup = mips_timer_setup;
  90
  91         _machine_restart = adm5120_restart;
  92         _machine_halt = adm5120_halt;
  93         pm_power_off = adm5120_power_off;
  94
  95         set_io_port_base(KSEG1);
  96 }
  97
  98 const char *get_system_type(void)
  99 {
 100         return "ADM5120 Board";
 101 }
 102
 103 static struct resource adm5120_hcd_resources[] = {
 104         [0] = {
 105                 .start  = 0x11200000,
 106                 .end    = 0x11200084,
 107                 .flags  = IORESOURCE_MEM,
 108         },
 109         [1] = {
 110                 .start  = 0x3,
 111                 .end    = 0x3,
 112                 .flags  = IORESOURCE_IRQ,
 113         },
 114 };
 115
 116 static struct platform_device adm5120hcd_device = {
 117         .name           = "adm5120-hcd",
 118         .id             = -1,
 119         .num_resources  = ARRAY_SIZE(adm5120_hcd_resources),
 120         .resource       = adm5120_hcd_resources,
 121 };
 122
 123 static struct platform_device *devices[] __initdata = {
 124         &adm5120hcd_device,
 125 };
 126
 127 static int __init adm5120_init(void)
 128 {
 129         return platform_add_devices(devices, ARRAY_SIZE(devices));
 130 }
 131
 132 subsys_initcall(adm5120_init);