1 /* 1 /*
2 * This file is subject to the terms and condi 2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the mai 3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details. 4 * for more details.
5 * 5 *
6 * Copyright (C) 1997, 1998, 2001, 03, 05, 06 6 * Copyright (C) 1997, 1998, 2001, 03, 05, 06 by Ralf Baechle
7 */ 7 */
8 #include <linux/linkage.h> 8 #include <linux/linkage.h>
9 #include <linux/init.h> 9 #include <linux/init.h>
10 #include <linux/rtc/ds1286.h> 10 #include <linux/rtc/ds1286.h>
11 #include <linux/interrupt.h> 11 #include <linux/interrupt.h>
12 #include <linux/kernel.h> 12 #include <linux/kernel.h>
13 #include <linux/sched/signal.h> 13 #include <linux/sched/signal.h>
14 #include <linux/panic_notifier.h> 14 #include <linux/panic_notifier.h>
15 #include <linux/pm.h> 15 #include <linux/pm.h>
16 #include <linux/timer.h> 16 #include <linux/timer.h>
17 17
18 #include <asm/io.h> 18 #include <asm/io.h>
19 #include <asm/irq.h> 19 #include <asm/irq.h>
20 #include <asm/reboot.h> 20 #include <asm/reboot.h>
21 #include <asm/sgialib.h> 21 #include <asm/sgialib.h>
22 #include <asm/sgi/ioc.h> 22 #include <asm/sgi/ioc.h>
23 #include <asm/sgi/hpc3.h> 23 #include <asm/sgi/hpc3.h>
24 #include <asm/sgi/mc.h> 24 #include <asm/sgi/mc.h>
25 #include <asm/sgi/ip22.h> 25 #include <asm/sgi/ip22.h>
26 26
27 /* 27 /*
28 * Just powerdown if init hasn't done after PO 28 * Just powerdown if init hasn't done after POWERDOWN_TIMEOUT seconds.
29 * I'm not sure if this feature is a good idea 29 * I'm not sure if this feature is a good idea, for now it's here just to
30 * make the power button make behave just like 30 * make the power button make behave just like under IRIX.
31 */ 31 */
32 #define POWERDOWN_TIMEOUT 120 32 #define POWERDOWN_TIMEOUT 120
33 33
34 /* 34 /*
35 * Blink frequency during reboot grace period 35 * Blink frequency during reboot grace period and when panicked.
36 */ 36 */
37 #define POWERDOWN_FREQ (HZ / 4) 37 #define POWERDOWN_FREQ (HZ / 4)
38 #define PANIC_FREQ (HZ / 8) 38 #define PANIC_FREQ (HZ / 8)
39 39
40 static struct timer_list power_timer, blink_ti 40 static struct timer_list power_timer, blink_timer, debounce_timer;
41 static unsigned long blink_timer_timeout; 41 static unsigned long blink_timer_timeout;
42 42
43 #define MACHINE_PANICKED 1 43 #define MACHINE_PANICKED 1
44 #define MACHINE_SHUTTING_DOWN 2 44 #define MACHINE_SHUTTING_DOWN 2
45 45
46 static int machine_state; 46 static int machine_state;
47 47
48 static void __noreturn sgi_machine_power_off(v 48 static void __noreturn sgi_machine_power_off(void)
49 { 49 {
50 unsigned int tmp; 50 unsigned int tmp;
51 51
52 local_irq_disable(); 52 local_irq_disable();
53 53
54 /* Disable watchdog */ 54 /* Disable watchdog */
55 tmp = hpc3c0->rtcregs[RTC_CMD] & 0xff; 55 tmp = hpc3c0->rtcregs[RTC_CMD] & 0xff;
56 hpc3c0->rtcregs[RTC_CMD] = tmp | RTC_W 56 hpc3c0->rtcregs[RTC_CMD] = tmp | RTC_WAM;
57 hpc3c0->rtcregs[RTC_WSEC] = 0; 57 hpc3c0->rtcregs[RTC_WSEC] = 0;
58 hpc3c0->rtcregs[RTC_WHSEC] = 0; 58 hpc3c0->rtcregs[RTC_WHSEC] = 0;
59 59
60 while (1) { 60 while (1) {
61 sgioc->panel = ~SGIOC_PANEL_PO 61 sgioc->panel = ~SGIOC_PANEL_POWERON;
62 /* Good bye cruel world ... * 62 /* Good bye cruel world ... */
63 63
64 /* If we're still running, we 64 /* If we're still running, we probably got sent an alarm
65 interrupt. Read the flag t 65 interrupt. Read the flag to clear it. */
66 tmp = hpc3c0->rtcregs[RTC_HOUR 66 tmp = hpc3c0->rtcregs[RTC_HOURS_ALARM];
67 } 67 }
68 } 68 }
69 69
70 static void __noreturn sgi_machine_restart(cha 70 static void __noreturn sgi_machine_restart(char *command)
71 { 71 {
72 if (machine_state & MACHINE_SHUTTING_D 72 if (machine_state & MACHINE_SHUTTING_DOWN)
73 sgi_machine_power_off(); 73 sgi_machine_power_off();
74 sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINI 74 sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINIT;
75 while (1); 75 while (1);
76 } 76 }
77 77
78 static void __noreturn sgi_machine_halt(void) 78 static void __noreturn sgi_machine_halt(void)
79 { 79 {
80 if (machine_state & MACHINE_SHUTTING_D 80 if (machine_state & MACHINE_SHUTTING_DOWN)
81 sgi_machine_power_off(); 81 sgi_machine_power_off();
82 ArcEnterInteractiveMode(); 82 ArcEnterInteractiveMode();
83 } 83 }
84 84
85 static void power_timeout(struct timer_list *u 85 static void power_timeout(struct timer_list *unused)
86 { 86 {
87 sgi_machine_power_off(); 87 sgi_machine_power_off();
88 } 88 }
89 89
90 static void blink_timeout(struct timer_list *u 90 static void blink_timeout(struct timer_list *unused)
91 { 91 {
92 /* XXX fix this for fullhouse */ 92 /* XXX fix this for fullhouse */
93 sgi_ioc_reset ^= (SGIOC_RESET_LC0OFF|S 93 sgi_ioc_reset ^= (SGIOC_RESET_LC0OFF|SGIOC_RESET_LC1OFF);
94 sgioc->reset = sgi_ioc_reset; 94 sgioc->reset = sgi_ioc_reset;
95 95
96 mod_timer(&blink_timer, jiffies + blin 96 mod_timer(&blink_timer, jiffies + blink_timer_timeout);
97 } 97 }
98 98
99 static void debounce(struct timer_list *unused 99 static void debounce(struct timer_list *unused)
100 { 100 {
101 del_timer(&debounce_timer); 101 del_timer(&debounce_timer);
102 if (sgint->istat1 & SGINT_ISTAT1_PWR) 102 if (sgint->istat1 & SGINT_ISTAT1_PWR) {
103 /* Interrupt still being sent. 103 /* Interrupt still being sent. */
104 debounce_timer.expires = jiffi 104 debounce_timer.expires = jiffies + (HZ / 20); /* 0.05s */
105 add_timer(&debounce_timer); 105 add_timer(&debounce_timer);
106 106
107 sgioc->panel = SGIOC_PANEL_POW 107 sgioc->panel = SGIOC_PANEL_POWERON | SGIOC_PANEL_POWERINTR |
108 SGIOC_PANEL_VOL 108 SGIOC_PANEL_VOLDNINTR | SGIOC_PANEL_VOLDNHOLD |
109 SGIOC_PANEL_VOL 109 SGIOC_PANEL_VOLUPINTR | SGIOC_PANEL_VOLUPHOLD;
110 110
111 return; 111 return;
112 } 112 }
113 113
114 if (machine_state & MACHINE_PANICKED) 114 if (machine_state & MACHINE_PANICKED)
115 sgimc->cpuctrl0 |= SGIMC_CCTRL 115 sgimc->cpuctrl0 |= SGIMC_CCTRL0_SYSINIT;
116 116
117 enable_irq(SGI_PANEL_IRQ); 117 enable_irq(SGI_PANEL_IRQ);
118 } 118 }
119 119
120 static inline void power_button(void) 120 static inline void power_button(void)
121 { 121 {
122 if (machine_state & MACHINE_PANICKED) 122 if (machine_state & MACHINE_PANICKED)
123 return; 123 return;
124 124
125 if ((machine_state & MACHINE_SHUTTING_ 125 if ((machine_state & MACHINE_SHUTTING_DOWN) ||
126 kill_cad_pid(SIGINT, 1 126 kill_cad_pid(SIGINT, 1)) {
127 /* No init process or button p 127 /* No init process or button pressed twice. */
128 sgi_machine_power_off(); 128 sgi_machine_power_off();
129 } 129 }
130 130
131 machine_state |= MACHINE_SHUTTING_DOWN 131 machine_state |= MACHINE_SHUTTING_DOWN;
132 blink_timer_timeout = POWERDOWN_FREQ; 132 blink_timer_timeout = POWERDOWN_FREQ;
133 blink_timeout(&blink_timer); 133 blink_timeout(&blink_timer);
134 134
135 timer_setup(&power_timer, power_timeou 135 timer_setup(&power_timer, power_timeout, 0);
136 power_timer.expires = jiffies + POWERD 136 power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
137 add_timer(&power_timer); 137 add_timer(&power_timer);
138 } 138 }
139 139
140 static irqreturn_t panel_int(int irq, void *de 140 static irqreturn_t panel_int(int irq, void *dev_id)
141 { 141 {
142 unsigned int buttons; 142 unsigned int buttons;
143 143
144 buttons = sgioc->panel; 144 buttons = sgioc->panel;
145 sgioc->panel = SGIOC_PANEL_POWERON | S 145 sgioc->panel = SGIOC_PANEL_POWERON | SGIOC_PANEL_POWERINTR;
146 146
147 if (sgint->istat1 & SGINT_ISTAT1_PWR) 147 if (sgint->istat1 & SGINT_ISTAT1_PWR) {
148 /* Wait until interrupt goes a 148 /* Wait until interrupt goes away */
149 disable_irq_nosync(SGI_PANEL_I 149 disable_irq_nosync(SGI_PANEL_IRQ);
150 timer_setup(&debounce_timer, d 150 timer_setup(&debounce_timer, debounce, 0);
151 debounce_timer.expires = jiffi 151 debounce_timer.expires = jiffies + 5;
152 add_timer(&debounce_timer); 152 add_timer(&debounce_timer);
153 } 153 }
154 154
155 /* Power button was pressed 155 /* Power button was pressed
156 * ioc.ps page 22: "The Panel Register 156 * ioc.ps page 22: "The Panel Register is called Power Control by Full
157 * House. Only lowest 2 bits are used. 157 * House. Only lowest 2 bits are used. Guiness uses upper four bits
158 * for volume control". This is not tr 158 * for volume control". This is not true, all bits are pulled high
159 * on fullhouse */ 159 * on fullhouse */
160 if (!(buttons & SGIOC_PANEL_POWERINTR) 160 if (!(buttons & SGIOC_PANEL_POWERINTR))
161 power_button(); 161 power_button();
162 162
163 return IRQ_HANDLED; 163 return IRQ_HANDLED;
164 } 164 }
165 165
166 static int panic_event(struct notifier_block * 166 static int panic_event(struct notifier_block *this, unsigned long event,
167 void *ptr) 167 void *ptr)
168 { 168 {
169 if (machine_state & MACHINE_PANICKED) 169 if (machine_state & MACHINE_PANICKED)
170 return NOTIFY_DONE; 170 return NOTIFY_DONE;
171 machine_state |= MACHINE_PANICKED; 171 machine_state |= MACHINE_PANICKED;
172 172
173 blink_timer_timeout = PANIC_FREQ; 173 blink_timer_timeout = PANIC_FREQ;
174 blink_timeout(&blink_timer); 174 blink_timeout(&blink_timer);
175 175
176 return NOTIFY_DONE; 176 return NOTIFY_DONE;
177 } 177 }
178 178
179 static struct notifier_block panic_block = { 179 static struct notifier_block panic_block = {
180 .notifier_call = panic_event, 180 .notifier_call = panic_event,
181 }; 181 };
182 182
183 static int __init reboot_setup(void) 183 static int __init reboot_setup(void)
184 { 184 {
185 int res; 185 int res;
186 186
187 _machine_restart = sgi_machine_restart 187 _machine_restart = sgi_machine_restart;
188 _machine_halt = sgi_machine_halt; 188 _machine_halt = sgi_machine_halt;
189 pm_power_off = sgi_machine_power_off; 189 pm_power_off = sgi_machine_power_off;
190 190
191 res = request_irq(SGI_PANEL_IRQ, panel 191 res = request_irq(SGI_PANEL_IRQ, panel_int, 0, "Front Panel", NULL);
192 if (res) { 192 if (res) {
193 printk(KERN_ERR "Allocation of 193 printk(KERN_ERR "Allocation of front panel IRQ failed\n");
194 return res; 194 return res;
195 } 195 }
196 196
197 timer_setup(&blink_timer, blink_timeou 197 timer_setup(&blink_timer, blink_timeout, 0);
198 atomic_notifier_chain_register(&panic_ 198 atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
199 199
200 return 0; 200 return 0;
201 } 201 }
202 202
203 subsys_initcall(reboot_setup); 203 subsys_initcall(reboot_setup);
204 204
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