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2ee98e0f WZ |
1 | /* Board-specific reboot/shutdown routines |
2 | * | |
3 | * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca> | |
4 | * | |
5 | * Copyright (C) 2009 Lemote Inc. | |
f7a904df | 6 | * Author: Wu Zhangjin, wuzhangjin@gmail.com |
2ee98e0f WZ |
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> | |
70ab711d | 23 | #include "ec_kb3310b.h" |
2ee98e0f WZ |
24 | |
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 | ||
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 | ||
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 | ||
2ee98e0f WZ |
79 | void ml2f_reboot(void) |
80 | { | |
81 | reset_cpu(); | |
82 | ||
83 | /* sending an reset signal to EC(embedded controller) */ | |
70ab711d | 84 | ec_write(REG_RESET, BIT_RESET_ON); |
2ee98e0f WZ |
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 | ||
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 | ||
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 | ||
123 | void mach_prepare_reboot(void) | |
124 | { | |
125 | switch (mips_machtype) { | |
126 | case MACH_LEMOTE_FL2F: | |
e13fb776 | 127 | case MACH_LEMOTE_NAS: |
6e552c9b | 128 | case MACH_LEMOTE_LL2F: |
2ee98e0f WZ |
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 | ||
142 | void mach_prepare_shutdown(void) | |
143 | { | |
144 | switch (mips_machtype) { | |
145 | case MACH_LEMOTE_FL2F: | |
e13fb776 | 146 | case MACH_LEMOTE_NAS: |
6e552c9b | 147 | case MACH_LEMOTE_LL2F: |
2ee98e0f WZ |
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 | } |