1 /* Board-specific reboot/shutdown routines
2 *
3 * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
4 *
5 * Copyright (C) 2009 Lemote Inc.
6 * Author: Wu Zhangjin, wuzhangjin@gmail.com
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14 #include <linux/io.h>
15 #include <linux/delay.h>
16 #include <linux/types.h>
17
18 #include <asm/bootinfo.h>
19
20 #include <loongson.h>
21
22 #include <cs5536/cs5536.h>
23 #include "ec_kb3310b.h"
24
reset_cpu(void)25 static void reset_cpu(void)
26 {
27 /*
28 * reset cpu to full speed, this is needed when enabling cpu frequency
29 * scalling
30 */
31 LOONGSON_CHIPCFG0 |= 0x7;
32 }
33
34 /* reset support for fuloong2f */
35
fl2f_reboot(void)36 static void fl2f_reboot(void)
37 {
38 reset_cpu();
39
40 /* send a reset signal to south bridge.
41 *
42 * NOTE: if enable "Power Management" in kernel, rtl8169 will not reset
43 * normally with this reset operation and it will not work in PMON, but
44 * you can type halt command and then reboot, seems the hardware reset
45 * logic not work normally.
46 */
47 {
48 u32 hi, lo;
49 _rdmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), &hi, &lo);
50 lo |= 0x00000001;
51 _wrmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), hi, lo);
52 }
53 }
54
fl2f_shutdown(void)55 static void fl2f_shutdown(void)
56 {
57 u32 hi, lo, val;
58 int gpio_base;
59
60 /* get gpio base */
61 _rdmsr(DIVIL_MSR_REG(DIVIL_LBAR_GPIO), &hi, &lo);
62 gpio_base = lo & 0xff00;
63
64 /* make cs5536 gpio13 output enable */
65 val = inl(gpio_base + GPIOL_OUT_EN);
66 val &= ~(1 << (16 + 13));
67 val |= (1 << 13);
68 outl(val, gpio_base + GPIOL_OUT_EN);
69 mmiowb();
70 /* make cs5536 gpio13 output low level voltage. */
71 val = inl(gpio_base + GPIOL_OUT_VAL) & ~(1 << (13));
72 val |= (1 << (16 + 13));
73 outl(val, gpio_base + GPIOL_OUT_VAL);
74 mmiowb();
75 }
76
77 /* reset support for yeeloong2f and mengloong2f notebook */
78
ml2f_reboot(void)79 void ml2f_reboot(void)
80 {
81 reset_cpu();
82
83 /* sending an reset signal to EC(embedded controller) */
84 ec_write(REG_RESET, BIT_RESET_ON);
85 }
86
87 #define yl2f89_reboot ml2f_reboot
88
89 /* menglong(7inches) laptop has different shutdown logic from 8.9inches */
90 #define EC_SHUTDOWN_IO_PORT_HIGH 0xff2d
91 #define EC_SHUTDOWN_IO_PORT_LOW 0xff2e
92 #define EC_SHUTDOWN_IO_PORT_DATA 0xff2f
93 #define REG_SHUTDOWN_HIGH 0xFC
94 #define REG_SHUTDOWN_LOW 0x29
95 #define BIT_SHUTDOWN_ON (1 << 1)
96
ml2f_shutdown(void)97 static void ml2f_shutdown(void)
98 {
99 u8 val;
100 u64 i;
101
102 outb(REG_SHUTDOWN_HIGH, EC_SHUTDOWN_IO_PORT_HIGH);
103 outb(REG_SHUTDOWN_LOW, EC_SHUTDOWN_IO_PORT_LOW);
104 mmiowb();
105 val = inb(EC_SHUTDOWN_IO_PORT_DATA);
106 outb(val & (~BIT_SHUTDOWN_ON), EC_SHUTDOWN_IO_PORT_DATA);
107 mmiowb();
108 /* need enough wait here... how many microseconds needs? */
109 for (i = 0; i < 0x10000; i++)
110 delay();
111 outb(val | BIT_SHUTDOWN_ON, EC_SHUTDOWN_IO_PORT_DATA);
112 mmiowb();
113 }
114
yl2f89_shutdown(void)115 static void yl2f89_shutdown(void)
116 {
117 /* cpu-gpio0 output low */
118 LOONGSON_GPIODATA &= ~0x00000001;
119 /* cpu-gpio0 as output */
120 LOONGSON_GPIOIE &= ~0x00000001;
121 }
122
mach_prepare_reboot(void)123 void mach_prepare_reboot(void)
124 {
125 switch (mips_machtype) {
126 case MACH_LEMOTE_FL2F:
127 case MACH_LEMOTE_NAS:
128 case MACH_LEMOTE_LL2F:
129 fl2f_reboot();
130 break;
131 case MACH_LEMOTE_ML2F7:
132 ml2f_reboot();
133 break;
134 case MACH_LEMOTE_YL2F89:
135 yl2f89_reboot();
136 break;
137 default:
138 break;
139 }
140 }
141
mach_prepare_shutdown(void)142 void mach_prepare_shutdown(void)
143 {
144 switch (mips_machtype) {
145 case MACH_LEMOTE_FL2F:
146 case MACH_LEMOTE_NAS:
147 case MACH_LEMOTE_LL2F:
148 fl2f_shutdown();
149 break;
150 case MACH_LEMOTE_ML2F7:
151 ml2f_shutdown();
152 break;
153 case MACH_LEMOTE_YL2F89:
154 yl2f89_shutdown();
155 break;
156 default:
157 break;
158 }
159 }
160