tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
MIPS: Lemote 2F: Add reset support
Fuloong 2F, Yeeloong 2F and Menglong 2F have different reset / shutdown
logic.
Signed-off-by: Wu 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: Ralf Baechle <ralf@linux-mips.org>
authored by
Wu Zhangjin
and committed by
Ralf Baechle
2ee98e0f
6616db78
+180
-1
+7
arch/mips/include/asm/mach-loongson/loongson.h
+7
arch/mips/include/asm/mach-loongson/loongson.h
···
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extern void __init mach_init_irq(void);
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extern void mach_irq_dispatch(unsigned int pending);
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/* We need this in some places... */
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#define delay() ({ \
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int x; \
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for (x = 0; x < 100000; x++) \
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__asm__ __volatile__(""); \
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})
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#define LOONGSON_REG(x) \
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(*(volatile u32 *)((char *)CKSEG1ADDR(LOONGSON_REG_BASE) + (x)))
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+1
-1
arch/mips/loongson/lemote-2f/Makefile
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-1
arch/mips/loongson/lemote-2f/Makefile
+172
arch/mips/loongson/lemote-2f/reset.c
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arch/mips/loongson/lemote-2f/reset.c
···
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/* Board-specific reboot/shutdown routines
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*
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* Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
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*
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* Copyright (C) 2009 Lemote Inc.
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* Author: Wu Zhangjin, wuzj@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/types.h>
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#include <asm/bootinfo.h>
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#include <loongson.h>
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#include <cs5536/cs5536.h>
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static void reset_cpu(void)
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{
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/*
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* reset cpu to full speed, this is needed when enabling cpu frequency
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* scalling
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*/
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LOONGSON_CHIPCFG0 |= 0x7;
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}
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/* reset support for fuloong2f */
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static void fl2f_reboot(void)
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{
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reset_cpu();
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/* send a reset signal to south bridge.
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*
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* NOTE: if enable "Power Management" in kernel, rtl8169 will not reset
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* normally with this reset operation and it will not work in PMON, but
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* you can type halt command and then reboot, seems the hardware reset
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* logic not work normally.
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*/
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{
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u32 hi, lo;
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_rdmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), &hi, &lo);
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lo |= 0x00000001;
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_wrmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), hi, lo);
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}
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}
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static void fl2f_shutdown(void)
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{
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u32 hi, lo, val;
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int gpio_base;
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/* get gpio base */
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_rdmsr(DIVIL_MSR_REG(DIVIL_LBAR_GPIO), &hi, &lo);
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gpio_base = lo & 0xff00;
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/* make cs5536 gpio13 output enable */
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val = inl(gpio_base + GPIOL_OUT_EN);
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val &= ~(1 << (16 + 13));
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val |= (1 << 13);
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outl(val, gpio_base + GPIOL_OUT_EN);
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mmiowb();
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/* make cs5536 gpio13 output low level voltage. */
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val = inl(gpio_base + GPIOL_OUT_VAL) & ~(1 << (13));
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val |= (1 << (16 + 13));
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outl(val, gpio_base + GPIOL_OUT_VAL);
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mmiowb();
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}
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/* reset support for yeeloong2f and mengloong2f notebook */
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/*
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* The following registers are determined by the EC index configuration.
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* 1. fill the PORT_HIGH as EC register high part.
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* 2. fill the PORT_LOW as EC register low part.
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* 3. fill the PORT_DATA as EC register write data or get the data from it.
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*/
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#define EC_IO_PORT_HIGH 0x0381
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#define EC_IO_PORT_LOW 0x0382
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#define EC_IO_PORT_DATA 0x0383
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#define REG_RESET_HIGH 0xF4 /* reset the machine auto-clear : rd/wr */
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#define REG_RESET_LOW 0xEC
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#define BIT_RESET_ON (1 << 0)
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void ml2f_reboot(void)
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{
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reset_cpu();
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/* sending an reset signal to EC(embedded controller) */
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outb(REG_RESET_HIGH, EC_IO_PORT_HIGH);
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outb(REG_RESET_LOW, EC_IO_PORT_LOW);
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mmiowb();
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outb(BIT_RESET_ON, EC_IO_PORT_DATA);
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mmiowb();
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}
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#define yl2f89_reboot ml2f_reboot
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/* menglong(7inches) laptop has different shutdown logic from 8.9inches */
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#define EC_SHUTDOWN_IO_PORT_HIGH 0xff2d
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#define EC_SHUTDOWN_IO_PORT_LOW 0xff2e
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#define EC_SHUTDOWN_IO_PORT_DATA 0xff2f
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#define REG_SHUTDOWN_HIGH 0xFC
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#define REG_SHUTDOWN_LOW 0x29
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#define BIT_SHUTDOWN_ON (1 << 1)
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static void ml2f_shutdown(void)
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{
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u8 val;
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u64 i;
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outb(REG_SHUTDOWN_HIGH, EC_SHUTDOWN_IO_PORT_HIGH);
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outb(REG_SHUTDOWN_LOW, EC_SHUTDOWN_IO_PORT_LOW);
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mmiowb();
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val = inb(EC_SHUTDOWN_IO_PORT_DATA);
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outb(val & (~BIT_SHUTDOWN_ON), EC_SHUTDOWN_IO_PORT_DATA);
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mmiowb();
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/* need enough wait here... how many microseconds needs? */
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for (i = 0; i < 0x10000; i++)
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delay();
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outb(val | BIT_SHUTDOWN_ON, EC_SHUTDOWN_IO_PORT_DATA);
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mmiowb();
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}
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static void yl2f89_shutdown(void)
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{
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/* cpu-gpio0 output low */
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LOONGSON_GPIODATA &= ~0x00000001;
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/* cpu-gpio0 as output */
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LOONGSON_GPIOIE &= ~0x00000001;
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}
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void mach_prepare_reboot(void)
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{
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switch (mips_machtype) {
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case MACH_LEMOTE_FL2F:
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fl2f_reboot();
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break;
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case MACH_LEMOTE_ML2F7:
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ml2f_reboot();
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break;
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case MACH_LEMOTE_YL2F89:
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yl2f89_reboot();
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break;
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default:
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break;
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}
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}
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void mach_prepare_shutdown(void)
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{
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switch (mips_machtype) {
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case MACH_LEMOTE_FL2F:
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fl2f_shutdown();
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break;
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case MACH_LEMOTE_ML2F7:
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ml2f_shutdown();
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break;
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case MACH_LEMOTE_YL2F89:
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yl2f89_shutdown();
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break;
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default:
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break;
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}
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}