156 lines
3.3 KiB
C
156 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/* Board-specific reboot/shutdown routines
|
|
*
|
|
* Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
|
|
*
|
|
* Copyright (C) 2009 Lemote Inc.
|
|
* Author: Wu Zhangjin, wuzhangjin@gmail.com
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/types.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
#include <loongson.h>
|
|
|
|
#include <cs5536/cs5536.h>
|
|
#include "ec_kb3310b.h"
|
|
|
|
static void reset_cpu(void)
|
|
{
|
|
/*
|
|
* reset cpu to full speed, this is needed when enabling cpu frequency
|
|
* scalling
|
|
*/
|
|
writel(readl(LOONGSON_CHIPCFG) | 0x7, LOONGSON_CHIPCFG);
|
|
}
|
|
|
|
/* 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 */
|
|
|
|
static void ml2f_reboot(void)
|
|
{
|
|
reset_cpu();
|
|
|
|
/* sending an reset signal to EC(embedded controller) */
|
|
ec_write(REG_RESET, BIT_RESET_ON);
|
|
}
|
|
|
|
#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:
|
|
case MACH_LEMOTE_NAS:
|
|
case MACH_LEMOTE_LL2F:
|
|
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:
|
|
case MACH_LEMOTE_NAS:
|
|
case MACH_LEMOTE_LL2F:
|
|
fl2f_shutdown();
|
|
break;
|
|
case MACH_LEMOTE_ML2F7:
|
|
ml2f_shutdown();
|
|
break;
|
|
case MACH_LEMOTE_YL2F89:
|
|
yl2f89_shutdown();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|