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Commit 2ee98e0f authored by Wu Zhangjin's avatar Wu Zhangjin Committed by Ralf Baechle
Browse files

MIPS: Lemote 2F: Add reset support 



Fuloong 2F, Yeeloong 2F and Menglong 2F have different reset / shutdown
logic.

Signed-off-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
Cc: zhangfx@lemote.com
Cc: yanh@lemote.com 
Cc: huhb@lemote.com
Cc: Nicholas Mc Guire <hofrat@hofr.at>
Cc: Arnaud Patard <apatard@mandriva.com>
Cc: loongson-dev@googlegroups.com
Cc: linux-mips@linux-mips.org
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 6616db78

arch/mips/include/asm/mach-loongson/loongson.h

+7 −0
Original line number Diff line number Diff line
@@ -42,6 +42,13 @@ extern void __init set_irq_trigger_mode(void); 
extern void __init mach_init_irq(void);

extern void mach_irq_dispatch(unsigned int pending);



/* We need this in some places... */

#define delay()	({		\

	int x;				\

	for (x = 0; x < 100000; x++)	\

		__asm__ __volatile__(""); \

})



#define LOONGSON_REG(x) \

	(*(volatile u32 *)((char *)CKSEG1ADDR(LOONGSON_REG_BASE) + (x)))

arch/mips/loongson/lemote-2f/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -2,4 +2,4 @@ 
# Makefile for lemote loongson2f family machines

#



obj-y += irq.o
 
obj-y += irq.o reset.o

arch/mips/loongson/lemote-2f/reset.c

0 → 100644
+172 −0
Original line number Diff line number Diff line 
/* 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;

	}

}