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review.evervolv.com / android_kernel_htc_msm8960 / 6e552c9b3aa7ba3be57b9569ec92a38af5c65e48 / . / arch / mips / loongson / lemote-2f / reset.c
blob: 44bb984d58dd117603fd1b29d6c092d41c9eda4d [file] [log] [blame]
Wu Zhangjin2ee98e02009-11-10 00:06:15 +0800[diff] [blame]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, wuzj@lemote.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
24static void reset_cpu(void)
25{
26 /*
27 * reset cpu to full speed, this is needed when enabling cpu frequency
28 * scalling
29 */
30 LOONGSON_CHIPCFG0 |= 0x7;
31}
32
33/* reset support for fuloong2f */
34
35static void fl2f_reboot(void)
36{
37 reset_cpu();
38
39 /* send a reset signal to south bridge.
40 *
41 * NOTE: if enable "Power Management" in kernel, rtl8169 will not reset
42 * normally with this reset operation and it will not work in PMON, but
43 * you can type halt command and then reboot, seems the hardware reset
44 * logic not work normally.
45 */
46 {
47 u32 hi, lo;
48 _rdmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), &hi, &lo);
49 lo |= 0x00000001;
50 _wrmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), hi, lo);
51 }
52}
53
54static void fl2f_shutdown(void)
55{
56 u32 hi, lo, val;
57 int gpio_base;
58
59 /* get gpio base */
60 _rdmsr(DIVIL_MSR_REG(DIVIL_LBAR_GPIO), &hi, &lo);
61 gpio_base = lo & 0xff00;
62
63 /* make cs5536 gpio13 output enable */
64 val = inl(gpio_base + GPIOL_OUT_EN);
65 val &= ~(1 << (16 + 13));
66 val |= (1 << 13);
67 outl(val, gpio_base + GPIOL_OUT_EN);
68 mmiowb();
69 /* make cs5536 gpio13 output low level voltage. */
70 val = inl(gpio_base + GPIOL_OUT_VAL) & ~(1 << (13));
71 val |= (1 << (16 + 13));
72 outl(val, gpio_base + GPIOL_OUT_VAL);
73 mmiowb();
74}
75
76/* reset support for yeeloong2f and mengloong2f notebook */
77
78/*
79 * The following registers are determined by the EC index configuration.
80 * 1. fill the PORT_HIGH as EC register high part.
81 * 2. fill the PORT_LOW as EC register low part.
82 * 3. fill the PORT_DATA as EC register write data or get the data from it.
83 */
84
85#define EC_IO_PORT_HIGH 0x0381
86#define EC_IO_PORT_LOW 0x0382
87#define EC_IO_PORT_DATA 0x0383
88#define REG_RESET_HIGH 0xF4 /* reset the machine auto-clear : rd/wr */
89#define REG_RESET_LOW 0xEC
90#define BIT_RESET_ON (1 << 0)
91
92void ml2f_reboot(void)
93{
94 reset_cpu();
95
96 /* sending an reset signal to EC(embedded controller) */
97 outb(REG_RESET_HIGH, EC_IO_PORT_HIGH);
98 outb(REG_RESET_LOW, EC_IO_PORT_LOW);
99 mmiowb();
100 outb(BIT_RESET_ON, EC_IO_PORT_DATA);
101 mmiowb();
102}
103
104#define yl2f89_reboot ml2f_reboot
105
106/* menglong(7inches) laptop has different shutdown logic from 8.9inches */
107#define EC_SHUTDOWN_IO_PORT_HIGH 0xff2d
108#define EC_SHUTDOWN_IO_PORT_LOW 0xff2e
109#define EC_SHUTDOWN_IO_PORT_DATA 0xff2f
110#define REG_SHUTDOWN_HIGH 0xFC
111#define REG_SHUTDOWN_LOW 0x29
112#define BIT_SHUTDOWN_ON (1 << 1)
113
114static void ml2f_shutdown(void)
115{
116 u8 val;
117 u64 i;
118
119 outb(REG_SHUTDOWN_HIGH, EC_SHUTDOWN_IO_PORT_HIGH);
120 outb(REG_SHUTDOWN_LOW, EC_SHUTDOWN_IO_PORT_LOW);
121 mmiowb();
122 val = inb(EC_SHUTDOWN_IO_PORT_DATA);
123 outb(val & (~BIT_SHUTDOWN_ON), EC_SHUTDOWN_IO_PORT_DATA);
124 mmiowb();
125 /* need enough wait here... how many microseconds needs? */
126 for (i = 0; i < 0x10000; i++)
127 delay();
128 outb(val | BIT_SHUTDOWN_ON, EC_SHUTDOWN_IO_PORT_DATA);
129 mmiowb();
130}
131
132static void yl2f89_shutdown(void)
133{
134 /* cpu-gpio0 output low */
135 LOONGSON_GPIODATA &= ~0x00000001;
136 /* cpu-gpio0 as output */
137 LOONGSON_GPIOIE &= ~0x00000001;
138}
139
140void mach_prepare_reboot(void)
141{
142 switch (mips_machtype) {
143 case MACH_LEMOTE_FL2F:
Wu Zhangjine13fb772009-11-17 00:58:14 +0800[diff] [blame]144 case MACH_LEMOTE_NAS:
Wu Zhangjin6e552c92009-11-17 00:58:15 +0800[diff] [blame^]145 case MACH_LEMOTE_LL2F:
Wu Zhangjin2ee98e02009-11-10 00:06:15 +0800[diff] [blame]146 fl2f_reboot();
147 break;
148 case MACH_LEMOTE_ML2F7:
149 ml2f_reboot();
150 break;
151 case MACH_LEMOTE_YL2F89:
152 yl2f89_reboot();
153 break;
154 default:
155 break;
156 }
157}
158
159void mach_prepare_shutdown(void)
160{
161 switch (mips_machtype) {
162 case MACH_LEMOTE_FL2F:
Wu Zhangjine13fb772009-11-17 00:58:14 +0800[diff] [blame]163 case MACH_LEMOTE_NAS:
Wu Zhangjin6e552c92009-11-17 00:58:15 +0800[diff] [blame^]164 case MACH_LEMOTE_LL2F:
Wu Zhangjin2ee98e02009-11-10 00:06:15 +0800[diff] [blame]165 fl2f_shutdown();
166 break;
167 case MACH_LEMOTE_ML2F7:
168 ml2f_shutdown();
169 break;
170 case MACH_LEMOTE_YL2F89:
171 yl2f89_shutdown();
172 break;
173 default:
174 break;
175 }
176}