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155 lines
3.3 KiB
155 lines
3.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* Board-specific reboot/shutdown routines |
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* |
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* Copyright (c) 2009 Philippe Vachon <[email protected]> |
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* |
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* Copyright (C) 2009 Lemote Inc. |
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* Author: Wu Zhangjin, [email protected] |
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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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#include "ec_kb3310b.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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writel(readl(LOONGSON_CHIPCFG) | 0x7, LOONGSON_CHIPCFG); |
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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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static 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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ec_write(REG_RESET, BIT_RESET_ON); |
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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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case MACH_LEMOTE_NAS: |
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case MACH_LEMOTE_LL2F: |
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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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case MACH_LEMOTE_NAS: |
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case MACH_LEMOTE_LL2F: |
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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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}
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