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1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001 Keith M Wesolowski
7 * Copyright (C) 2001 Paul Mundt
8 * Copyright (C) 2003 Guido Guenther <agx@sigxcpu.org>
9 */
10
11#include <linux/compiler.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/sched.h>
16#include <linux/notifier.h>
17#include <linux/delay.h>
18#include <linux/rtc/ds1685.h>
19#include <linux/interrupt.h>
20#include <linux/pm.h>
21
22#include <asm/addrspace.h>
23#include <asm/irq.h>
24#include <asm/reboot.h>
25#include <asm/wbflush.h>
26#include <asm/ip32/mace.h>
27#include <asm/ip32/crime.h>
28#include <asm/ip32/ip32_ints.h>
29
30#define POWERDOWN_TIMEOUT 120
31/*
32 * Blink frequency during reboot grace period and when panicked.
33 */
34#define POWERDOWN_FREQ (HZ / 4)
35#define PANIC_FREQ (HZ / 8)
36
37extern struct platform_device ip32_rtc_device;
38
39static struct timer_list power_timer, blink_timer;
40static int has_panicked, shutting_down;
41
42static __noreturn void ip32_poweroff(void *data)
43{
44 void (*poweroff_func)(struct platform_device *) =
45 symbol_get(ds1685_rtc_poweroff);
46
47#ifdef CONFIG_MODULES
48 /* If the first __symbol_get failed, our module wasn't loaded. */
49 if (!poweroff_func) {
50 request_module("rtc-ds1685");
51 poweroff_func = symbol_get(ds1685_rtc_poweroff);
52 }
53#endif
54
55 if (!poweroff_func)
56 pr_emerg("RTC not available for power-off. Spinning forever ...\n");
57 else {
58 (*poweroff_func)((struct platform_device *)data);
59 symbol_put(ds1685_rtc_poweroff);
60 }
61
62 unreachable();
63}
64
65static void ip32_machine_restart(char *cmd) __noreturn;
66static void ip32_machine_restart(char *cmd)
67{
68 msleep(20);
69 crime->control = CRIME_CONTROL_HARD_RESET;
70 unreachable();
71}
72
73static void blink_timeout(unsigned long data)
74{
75 unsigned long led = mace->perif.ctrl.misc ^ MACEISA_LED_RED;
76 mace->perif.ctrl.misc = led;
77 mod_timer(&blink_timer, jiffies + data);
78}
79
80static void ip32_machine_halt(void)
81{
82 ip32_poweroff(&ip32_rtc_device);
83}
84
85static void power_timeout(unsigned long data)
86{
87 ip32_poweroff(&ip32_rtc_device);
88}
89
90void ip32_prepare_poweroff(void)
91{
92 if (has_panicked)
93 return;
94
95 if (shutting_down || kill_cad_pid(SIGINT, 1)) {
96 /* No init process or button pressed twice. */
97 ip32_poweroff(&ip32_rtc_device);
98 }
99
100 shutting_down = 1;
101 blink_timer.data = POWERDOWN_FREQ;
102 blink_timeout(POWERDOWN_FREQ);
103
104 init_timer(&power_timer);
105 power_timer.function = power_timeout;
106 power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
107 add_timer(&power_timer);
108}
109
110static int panic_event(struct notifier_block *this, unsigned long event,
111 void *ptr)
112{
113 unsigned long led;
114
115 if (has_panicked)
116 return NOTIFY_DONE;
117 has_panicked = 1;
118
119 /* turn off the green LED */
120 led = mace->perif.ctrl.misc | MACEISA_LED_GREEN;
121 mace->perif.ctrl.misc = led;
122
123 blink_timer.data = PANIC_FREQ;
124 blink_timeout(PANIC_FREQ);
125
126 return NOTIFY_DONE;
127}
128
129static struct notifier_block panic_block = {
130 .notifier_call = panic_event,
131};
132
133static __init int ip32_reboot_setup(void)
134{
135 /* turn on the green led only */
136 unsigned long led = mace->perif.ctrl.misc;
137 led |= MACEISA_LED_RED;
138 led &= ~MACEISA_LED_GREEN;
139 mace->perif.ctrl.misc = led;
140
141 _machine_restart = ip32_machine_restart;
142 _machine_halt = ip32_machine_halt;
143 pm_power_off = ip32_machine_halt;
144
145 init_timer(&blink_timer);
146 blink_timer.function = blink_timeout;
147 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
148
149 return 0;
150}
151
152subsys_initcall(ip32_reboot_setup);
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001 Keith M Wesolowski
7 * Copyright (C) 2001 Paul Mundt
8 * Copyright (C) 2003 Guido Guenther <agx@sigxcpu.org>
9 */
10
11#include <linux/compiler.h>
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/sched.h>
16#include <linux/sched/signal.h>
17#include <linux/notifier.h>
18#include <linux/delay.h>
19#include <linux/rtc/ds1685.h>
20#include <linux/interrupt.h>
21#include <linux/pm.h>
22
23#include <asm/addrspace.h>
24#include <asm/irq.h>
25#include <asm/reboot.h>
26#include <asm/wbflush.h>
27#include <asm/ip32/mace.h>
28#include <asm/ip32/crime.h>
29#include <asm/ip32/ip32_ints.h>
30
31#define POWERDOWN_TIMEOUT 120
32/*
33 * Blink frequency during reboot grace period and when panicked.
34 */
35#define POWERDOWN_FREQ (HZ / 4)
36#define PANIC_FREQ (HZ / 8)
37
38extern struct platform_device ip32_rtc_device;
39
40static struct timer_list power_timer, blink_timer;
41static unsigned long blink_timer_timeout;
42static int has_panicked, shutting_down;
43
44static __noreturn void ip32_poweroff(void *data)
45{
46 void (*poweroff_func)(struct platform_device *) =
47 symbol_get(ds1685_rtc_poweroff);
48
49#ifdef CONFIG_MODULES
50 /* If the first __symbol_get failed, our module wasn't loaded. */
51 if (!poweroff_func) {
52 request_module("rtc-ds1685");
53 poweroff_func = symbol_get(ds1685_rtc_poweroff);
54 }
55#endif
56
57 if (!poweroff_func)
58 pr_emerg("RTC not available for power-off. Spinning forever ...\n");
59 else {
60 (*poweroff_func)((struct platform_device *)data);
61 symbol_put(ds1685_rtc_poweroff);
62 }
63
64 unreachable();
65}
66
67static void ip32_machine_restart(char *cmd) __noreturn;
68static void ip32_machine_restart(char *cmd)
69{
70 msleep(20);
71 crime->control = CRIME_CONTROL_HARD_RESET;
72 unreachable();
73}
74
75static void blink_timeout(struct timer_list *unused)
76{
77 unsigned long led = mace->perif.ctrl.misc ^ MACEISA_LED_RED;
78 mace->perif.ctrl.misc = led;
79 mod_timer(&blink_timer, jiffies + blink_timer_timeout);
80}
81
82static void ip32_machine_halt(void)
83{
84 ip32_poweroff(&ip32_rtc_device);
85}
86
87static void power_timeout(struct timer_list *unused)
88{
89 ip32_poweroff(&ip32_rtc_device);
90}
91
92void ip32_prepare_poweroff(void)
93{
94 if (has_panicked)
95 return;
96
97 if (shutting_down || kill_cad_pid(SIGINT, 1)) {
98 /* No init process or button pressed twice. */
99 ip32_poweroff(&ip32_rtc_device);
100 }
101
102 shutting_down = 1;
103 blink_timer_timeout = POWERDOWN_FREQ;
104 blink_timeout(&blink_timer);
105
106 timer_setup(&power_timer, power_timeout, 0);
107 power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
108 add_timer(&power_timer);
109}
110
111static int panic_event(struct notifier_block *this, unsigned long event,
112 void *ptr)
113{
114 unsigned long led;
115
116 if (has_panicked)
117 return NOTIFY_DONE;
118 has_panicked = 1;
119
120 /* turn off the green LED */
121 led = mace->perif.ctrl.misc | MACEISA_LED_GREEN;
122 mace->perif.ctrl.misc = led;
123
124 blink_timer_timeout = PANIC_FREQ;
125 blink_timeout(&blink_timer);
126
127 return NOTIFY_DONE;
128}
129
130static struct notifier_block panic_block = {
131 .notifier_call = panic_event,
132};
133
134static __init int ip32_reboot_setup(void)
135{
136 /* turn on the green led only */
137 unsigned long led = mace->perif.ctrl.misc;
138 led |= MACEISA_LED_RED;
139 led &= ~MACEISA_LED_GREEN;
140 mace->perif.ctrl.misc = led;
141
142 _machine_restart = ip32_machine_restart;
143 _machine_halt = ip32_machine_halt;
144 pm_power_off = ip32_machine_halt;
145
146 timer_setup(&blink_timer, blink_timeout, 0);
147 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
148
149 return 0;
150}
151
152subsys_initcall(ip32_reboot_setup);