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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/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);
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/panic_notifier.h>
16#include <linux/sched.h>
17#include <linux/sched/signal.h>
18#include <linux/notifier.h>
19#include <linux/delay.h>
20#include <linux/rtc/ds1685.h>
21#include <linux/interrupt.h>
22#include <linux/pm.h>
23
24#include <asm/addrspace.h>
25#include <asm/irq.h>
26#include <asm/reboot.h>
27#include <asm/wbflush.h>
28#include <asm/ip32/mace.h>
29#include <asm/ip32/crime.h>
30#include <asm/ip32/ip32_ints.h>
31
32#define POWERDOWN_TIMEOUT 120
33/*
34 * Blink frequency during reboot grace period and when panicked.
35 */
36#define POWERDOWN_FREQ (HZ / 4)
37#define PANIC_FREQ (HZ / 8)
38
39extern struct platform_device ip32_rtc_device;
40
41static struct timer_list power_timer, blink_timer;
42static unsigned long blink_timer_timeout;
43static int has_panicked, shutting_down;
44
45static __noreturn void ip32_poweroff(void *data)
46{
47 void (*poweroff_func)(struct platform_device *) =
48 symbol_get(ds1685_rtc_poweroff);
49
50#ifdef CONFIG_MODULES
51 /* If the first __symbol_get failed, our module wasn't loaded. */
52 if (!poweroff_func) {
53 request_module("rtc-ds1685");
54 poweroff_func = symbol_get(ds1685_rtc_poweroff);
55 }
56#endif
57
58 if (!poweroff_func)
59 pr_emerg("RTC not available for power-off. Spinning forever ...\n");
60 else {
61 (*poweroff_func)((struct platform_device *)data);
62 symbol_put(ds1685_rtc_poweroff);
63 }
64
65 unreachable();
66}
67
68static void ip32_machine_restart(char *cmd) __noreturn;
69static void ip32_machine_restart(char *cmd)
70{
71 msleep(20);
72 crime->control = CRIME_CONTROL_HARD_RESET;
73 unreachable();
74}
75
76static void blink_timeout(struct timer_list *unused)
77{
78 unsigned long led = mace->perif.ctrl.misc ^ MACEISA_LED_RED;
79 mace->perif.ctrl.misc = led;
80 mod_timer(&blink_timer, jiffies + blink_timer_timeout);
81}
82
83static void ip32_machine_halt(void)
84{
85 ip32_poweroff(&ip32_rtc_device);
86}
87
88static void power_timeout(struct timer_list *unused)
89{
90 ip32_poweroff(&ip32_rtc_device);
91}
92
93void ip32_prepare_poweroff(void)
94{
95 if (has_panicked)
96 return;
97
98 if (shutting_down || kill_cad_pid(SIGINT, 1)) {
99 /* No init process or button pressed twice. */
100 ip32_poweroff(&ip32_rtc_device);
101 }
102
103 shutting_down = 1;
104 blink_timer_timeout = POWERDOWN_FREQ;
105 blink_timeout(&blink_timer);
106
107 timer_setup(&power_timer, power_timeout, 0);
108 power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
109 add_timer(&power_timer);
110}
111
112static int panic_event(struct notifier_block *this, unsigned long event,
113 void *ptr)
114{
115 unsigned long led;
116
117 if (has_panicked)
118 return NOTIFY_DONE;
119 has_panicked = 1;
120
121 /* turn off the green LED */
122 led = mace->perif.ctrl.misc | MACEISA_LED_GREEN;
123 mace->perif.ctrl.misc = led;
124
125 blink_timer_timeout = PANIC_FREQ;
126 blink_timeout(&blink_timer);
127
128 return NOTIFY_DONE;
129}
130
131static struct notifier_block panic_block = {
132 .notifier_call = panic_event,
133};
134
135static __init int ip32_reboot_setup(void)
136{
137 /* turn on the green led only */
138 unsigned long led = mace->perif.ctrl.misc;
139 led |= MACEISA_LED_RED;
140 led &= ~MACEISA_LED_GREEN;
141 mace->perif.ctrl.misc = led;
142
143 _machine_restart = ip32_machine_restart;
144 _machine_halt = ip32_machine_halt;
145 pm_power_off = ip32_machine_halt;
146
147 timer_setup(&blink_timer, blink_timeout, 0);
148 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
149
150 return 0;
151}
152
153subsys_initcall(ip32_reboot_setup);