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/* Board-specific reboot/shutdown routines
*
* Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
*
* Copyright (C) 2009 Lemote Inc.
* Author: Wu Zhangjin, wuzj@lemote.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <cs5536/cs5536.h>
static void reset_cpu(void)
{
/*
* reset cpu to full speed, this is needed when enabling cpu frequency
* scalling
*/
LOONGSON_CHIPCFG0 |= 0x7;
}
/* reset support for fuloong2f */
static void fl2f_reboot(void)
{
reset_cpu();
/* send a reset signal to south bridge.
*
* NOTE: if enable "Power Management" in kernel, rtl8169 will not reset
* normally with this reset operation and it will not work in PMON, but
* you can type halt command and then reboot, seems the hardware reset
* logic not work normally.
*/
{
u32 hi, lo;
_rdmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), &hi, &lo);
lo |= 0x00000001;
_wrmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), hi, lo);
}
}
static void fl2f_shutdown(void)
{
u32 hi, lo, val;
int gpio_base;
/* get gpio base */
_rdmsr(DIVIL_MSR_REG(DIVIL_LBAR_GPIO), &hi, &lo);
gpio_base = lo & 0xff00;
/* make cs5536 gpio13 output enable */
val = inl(gpio_base + GPIOL_OUT_EN);
val &= ~(1 << (16 + 13));
val |= (1 << 13);
outl(val, gpio_base + GPIOL_OUT_EN);
mmiowb();
/* make cs5536 gpio13 output low level voltage. */
val = inl(gpio_base + GPIOL_OUT_VAL) & ~(1 << (13));
val |= (1 << (16 + 13));
outl(val, gpio_base + GPIOL_OUT_VAL);
mmiowb();
}
/* reset support for yeeloong2f and mengloong2f notebook */
/*
* The following registers are determined by the EC index configuration.
* 1. fill the PORT_HIGH as EC register high part.
* 2. fill the PORT_LOW as EC register low part.
* 3. fill the PORT_DATA as EC register write data or get the data from it.
*/
#define EC_IO_PORT_HIGH 0x0381
#define EC_IO_PORT_LOW 0x0382
#define EC_IO_PORT_DATA 0x0383
#define REG_RESET_HIGH 0xF4 /* reset the machine auto-clear : rd/wr */
#define REG_RESET_LOW 0xEC
#define BIT_RESET_ON (1 << 0)
void ml2f_reboot(void)
{
reset_cpu();
/* sending an reset signal to EC(embedded controller) */
outb(REG_RESET_HIGH, EC_IO_PORT_HIGH);
outb(REG_RESET_LOW, EC_IO_PORT_LOW);
mmiowb();
outb(BIT_RESET_ON, EC_IO_PORT_DATA);
mmiowb();
}
#define yl2f89_reboot ml2f_reboot
/* menglong(7inches) laptop has different shutdown logic from 8.9inches */
#define EC_SHUTDOWN_IO_PORT_HIGH 0xff2d
#define EC_SHUTDOWN_IO_PORT_LOW 0xff2e
#define EC_SHUTDOWN_IO_PORT_DATA 0xff2f
#define REG_SHUTDOWN_HIGH 0xFC
#define REG_SHUTDOWN_LOW 0x29
#define BIT_SHUTDOWN_ON (1 << 1)
static void ml2f_shutdown(void)
{
u8 val;
u64 i;
outb(REG_SHUTDOWN_HIGH, EC_SHUTDOWN_IO_PORT_HIGH);
outb(REG_SHUTDOWN_LOW, EC_SHUTDOWN_IO_PORT_LOW);
mmiowb();
val = inb(EC_SHUTDOWN_IO_PORT_DATA);
outb(val & (~BIT_SHUTDOWN_ON), EC_SHUTDOWN_IO_PORT_DATA);
mmiowb();
/* need enough wait here... how many microseconds needs? */
for (i = 0; i < 0x10000; i++)
delay();
outb(val | BIT_SHUTDOWN_ON, EC_SHUTDOWN_IO_PORT_DATA);
mmiowb();
}
static void yl2f89_shutdown(void)
{
/* cpu-gpio0 output low */
LOONGSON_GPIODATA &= ~0x00000001;
/* cpu-gpio0 as output */
LOONGSON_GPIOIE &= ~0x00000001;
}
void mach_prepare_reboot(void)
{
switch (mips_machtype) {
case MACH_LEMOTE_FL2F:
fl2f_reboot();
break;
case MACH_LEMOTE_ML2F7:
ml2f_reboot();
break;
case MACH_LEMOTE_YL2F89:
yl2f89_reboot();
break;
default:
break;
}
}
void mach_prepare_shutdown(void)
{
switch (mips_machtype) {
case MACH_LEMOTE_FL2F:
fl2f_shutdown();
break;
case MACH_LEMOTE_ML2F7:
ml2f_shutdown();
break;
case MACH_LEMOTE_YL2F89:
yl2f89_shutdown();
break;
default:
break;
}
}
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