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133 lines
2.7 KiB
C
133 lines
2.7 KiB
C
/*
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* Copyright (C) ADMtek Incorporated.
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* Creator : daniell@admtek.com.tw
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* Copyright 1999, 2000 MIPS Technologies, Inc.
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* Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005
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*/
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#include <linux/autoconf.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <asm/reboot.h>
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#include <asm/io.h>
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#include <asm/time.h>
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#define ADM5120_SOFTRESET 0x12000004
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#define STATUS_IE 0x00000001
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#define ALLINTS (IE_IRQ0 | IE_IRQ5 | STATUS_IE)
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#define ADM5120_CODEREG 0x12000000
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#define ADM5120_CPU_CLK_MASK 0x00300000
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#define ADM5120_CPU_CLK_175 0x00000000
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#define ADM5120_CPU_CLK_200 0x00100000
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#define ADM5120_CPU_CLK_225 0x00200000
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#define ADM5120_CPU_CLK_250 0x00300000
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void mips_time_init(void);
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extern unsigned int mips_counter_frequency;
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void adm5120_restart(char *command)
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{
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*(u32*)KSEG1ADDR(ADM5120_SOFTRESET)=1;
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}
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void adm5120_halt(void)
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{
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printk(KERN_NOTICE "\n** You can safely turn off the power\n");
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while (1);
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}
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void adm5120_power_off(void)
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{
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adm5120_halt();
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}
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void __init mips_time_init(void)
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{
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u32 clock;
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clock = *(u32*)KSEG1ADDR(ADM5120_CODEREG);
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switch (clock & ADM5120_CPU_CLK_MASK) {
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case ADM5120_CPU_CLK_175:
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mips_counter_frequency = 87500000;
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printk("CPU clock: 175MHz\n");
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break;
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case ADM5120_CPU_CLK_200:
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mips_counter_frequency = 100000000;
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printk("CPU clock: 200MHz\n");
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break;
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case ADM5120_CPU_CLK_225:
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mips_counter_frequency = 112500000;
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printk("CPU clock: 225MHz\n");
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break;
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case ADM5120_CPU_CLK_250:
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mips_counter_frequency = 125000000;
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printk("CPU clock: 250MHz\n");
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break;
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}
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}
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void __init plat_timer_setup(struct irqaction *irq)
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{
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/* to generate the first timer interrupt */
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write_c0_compare(read_c0_count()+ mips_counter_frequency/HZ);
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clear_c0_status(ST0_BEV);
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set_c0_status(ALLINTS);
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}
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void __init plat_mem_setup(void)
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{
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printk(KERN_INFO "ADM5120 board setup\n");
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board_time_init = mips_time_init;
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//board_timer_setup = mips_timer_setup;
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_machine_restart = adm5120_restart;
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_machine_halt = adm5120_halt;
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pm_power_off = adm5120_power_off;
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set_io_port_base(KSEG1);
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}
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const char *get_system_type(void)
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{
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return "ADM5120 Board";
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}
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static struct resource adm5120_hcd_resources[] = {
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[0] = {
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.start = 0x11200000,
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.end = 0x11200084,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = 0x3,
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.end = 0x3,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device adm5120hcd_device = {
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.name = "adm5120-hcd",
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.id = -1,
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.num_resources = ARRAY_SIZE(adm5120_hcd_resources),
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.resource = adm5120_hcd_resources,
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};
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static struct platform_device *devices[] __initdata = {
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&adm5120hcd_device,
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};
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static int __init adm5120_init(void)
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{
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return platform_add_devices(devices, ARRAY_SIZE(devices));
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}
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subsys_initcall(adm5120_init);
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