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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/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#include "ip32-common.h"
33
34#define POWERDOWN_TIMEOUT 120
35/*
36 * Blink frequency during reboot grace period and when panicked.
37 */
38#define POWERDOWN_FREQ (HZ / 4)
39#define PANIC_FREQ (HZ / 8)
40
41extern struct platform_device ip32_rtc_device;
42
43static struct timer_list power_timer, blink_timer;
44static unsigned long blink_timer_timeout;
45static int has_panicked, shutting_down;
46
47static __noreturn void ip32_poweroff(void *data)
48{
49 void (*poweroff_func)(struct platform_device *) =
50 symbol_get(ds1685_rtc_poweroff);
51
52#ifdef CONFIG_MODULES
53 /* If the first __symbol_get failed, our module wasn't loaded. */
54 if (!poweroff_func) {
55 request_module("rtc-ds1685");
56 poweroff_func = symbol_get(ds1685_rtc_poweroff);
57 }
58#endif
59
60 if (!poweroff_func)
61 pr_emerg("RTC not available for power-off. Spinning forever ...\n");
62 else {
63 (*poweroff_func)((struct platform_device *)data);
64 symbol_put(ds1685_rtc_poweroff);
65 }
66
67 unreachable();
68}
69
70static void ip32_machine_restart(char *cmd) __noreturn;
71static void ip32_machine_restart(char *cmd)
72{
73 msleep(20);
74 crime->control = CRIME_CONTROL_HARD_RESET;
75 unreachable();
76}
77
78static void blink_timeout(struct timer_list *unused)
79{
80 unsigned long led = mace->perif.ctrl.misc ^ MACEISA_LED_RED;
81 mace->perif.ctrl.misc = led;
82 mod_timer(&blink_timer, jiffies + blink_timer_timeout);
83}
84
85static void ip32_machine_halt(void)
86{
87 ip32_poweroff(&ip32_rtc_device);
88}
89
90static void power_timeout(struct timer_list *unused)
91{
92 ip32_poweroff(&ip32_rtc_device);
93}
94
95void ip32_prepare_poweroff(void)
96{
97 if (has_panicked)
98 return;
99
100 if (shutting_down || kill_cad_pid(SIGINT, 1)) {
101 /* No init process or button pressed twice. */
102 ip32_poweroff(&ip32_rtc_device);
103 }
104
105 shutting_down = 1;
106 blink_timer_timeout = POWERDOWN_FREQ;
107 blink_timeout(&blink_timer);
108
109 timer_setup(&power_timer, power_timeout, 0);
110 power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
111 add_timer(&power_timer);
112}
113
114static int panic_event(struct notifier_block *this, unsigned long event,
115 void *ptr)
116{
117 unsigned long led;
118
119 if (has_panicked)
120 return NOTIFY_DONE;
121 has_panicked = 1;
122
123 /* turn off the green LED */
124 led = mace->perif.ctrl.misc | MACEISA_LED_GREEN;
125 mace->perif.ctrl.misc = led;
126
127 blink_timer_timeout = PANIC_FREQ;
128 blink_timeout(&blink_timer);
129
130 return NOTIFY_DONE;
131}
132
133static struct notifier_block panic_block = {
134 .notifier_call = panic_event,
135};
136
137static __init int ip32_reboot_setup(void)
138{
139 /* turn on the green led only */
140 unsigned long led = mace->perif.ctrl.misc;
141 led |= MACEISA_LED_RED;
142 led &= ~MACEISA_LED_GREEN;
143 mace->perif.ctrl.misc = led;
144
145 _machine_restart = ip32_machine_restart;
146 _machine_halt = ip32_machine_halt;
147 pm_power_off = ip32_machine_halt;
148
149 timer_setup(&blink_timer, blink_timeout, 0);
150 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
151
152 return 0;
153}
154
155subsys_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);