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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/acpi/sleep
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/acpi/sleep')
-rw-r--r--drivers/acpi/sleep/Makefile5
-rw-r--r--drivers/acpi/sleep/main.c234
-rw-r--r--drivers/acpi/sleep/poweroff.c39
-rw-r--r--drivers/acpi/sleep/proc.c509
-rw-r--r--drivers/acpi/sleep/sleep.h8
-rw-r--r--drivers/acpi/sleep/wakeup.c209
6 files changed, 1004 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/Makefile b/drivers/acpi/sleep/Makefile
new file mode 100644
index 000000000000..d6c017709c85
--- /dev/null
+++ b/drivers/acpi/sleep/Makefile
@@ -0,0 +1,5 @@
1obj-y := poweroff.o wakeup.o
2obj-$(CONFIG_ACPI_SLEEP) += main.o
3obj-$(CONFIG_ACPI_SLEEP_PROC_FS) += proc.o
4
5EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
new file mode 100644
index 000000000000..0a5d2a94131e
--- /dev/null
+++ b/drivers/acpi/sleep/main.c
@@ -0,0 +1,234 @@
1/*
2 * sleep.c - ACPI sleep support.
3 *
4 * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
5 * Copyright (c) 2000-2003 Patrick Mochel
6 * Copyright (c) 2003 Open Source Development Lab
7 *
8 * This file is released under the GPLv2.
9 *
10 */
11
12#include <linux/delay.h>
13#include <linux/irq.h>
14#include <linux/dmi.h>
15#include <linux/device.h>
16#include <linux/suspend.h>
17#include <asm/io.h>
18#include <acpi/acpi_bus.h>
19#include <acpi/acpi_drivers.h>
20#include "sleep.h"
21
22u8 sleep_states[ACPI_S_STATE_COUNT];
23
24static struct pm_ops acpi_pm_ops;
25
26extern void do_suspend_lowlevel_s4bios(void);
27extern void do_suspend_lowlevel(void);
28
29static u32 acpi_suspend_states[] = {
30 [PM_SUSPEND_ON] = ACPI_STATE_S0,
31 [PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
32 [PM_SUSPEND_MEM] = ACPI_STATE_S3,
33 [PM_SUSPEND_DISK] = ACPI_STATE_S4,
34};
35
36static int init_8259A_after_S1;
37
38/**
39 * acpi_pm_prepare - Do preliminary suspend work.
40 * @pm_state: suspend state we're entering.
41 *
42 * Make sure we support the state. If we do, and we need it, set the
43 * firmware waking vector and do arch-specific nastiness to get the
44 * wakeup code to the waking vector.
45 */
46
47static int acpi_pm_prepare(suspend_state_t pm_state)
48{
49 u32 acpi_state = acpi_suspend_states[pm_state];
50
51 if (!sleep_states[acpi_state])
52 return -EPERM;
53
54 /* do we have a wakeup address for S2 and S3? */
55 /* Here, we support only S4BIOS, those we set the wakeup address */
56 /* S4OS is only supported for now via swsusp.. */
57 if (pm_state == PM_SUSPEND_MEM || pm_state == PM_SUSPEND_DISK) {
58 if (!acpi_wakeup_address)
59 return -EFAULT;
60 acpi_set_firmware_waking_vector(
61 (acpi_physical_address) virt_to_phys(
62 (void *)acpi_wakeup_address));
63 }
64 ACPI_FLUSH_CPU_CACHE();
65 acpi_enable_wakeup_device_prep(acpi_state);
66 acpi_enter_sleep_state_prep(acpi_state);
67 return 0;
68}
69
70
71/**
72 * acpi_pm_enter - Actually enter a sleep state.
73 * @pm_state: State we're entering.
74 *
75 * Flush caches and go to sleep. For STR or STD, we have to call
76 * arch-specific assembly, which in turn call acpi_enter_sleep_state().
77 * It's unfortunate, but it works. Please fix if you're feeling frisky.
78 */
79
80static int acpi_pm_enter(suspend_state_t pm_state)
81{
82 acpi_status status = AE_OK;
83 unsigned long flags = 0;
84 u32 acpi_state = acpi_suspend_states[pm_state];
85
86 ACPI_FLUSH_CPU_CACHE();
87
88 /* Do arch specific saving of state. */
89 if (pm_state > PM_SUSPEND_STANDBY) {
90 int error = acpi_save_state_mem();
91 if (error)
92 return error;
93 }
94
95
96 local_irq_save(flags);
97 acpi_enable_wakeup_device(acpi_state);
98 switch (pm_state)
99 {
100 case PM_SUSPEND_STANDBY:
101 barrier();
102 status = acpi_enter_sleep_state(acpi_state);
103 break;
104
105 case PM_SUSPEND_MEM:
106 do_suspend_lowlevel();
107 break;
108
109 case PM_SUSPEND_DISK:
110 if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM)
111 status = acpi_enter_sleep_state(acpi_state);
112 else
113 do_suspend_lowlevel_s4bios();
114 break;
115 default:
116 return -EINVAL;
117 }
118 local_irq_restore(flags);
119 printk(KERN_DEBUG "Back to C!\n");
120
121 /* restore processor state
122 * We should only be here if we're coming back from STR or STD.
123 * And, in the case of the latter, the memory image should have already
124 * been loaded from disk.
125 */
126 if (pm_state > PM_SUSPEND_STANDBY)
127 acpi_restore_state_mem();
128
129
130 return ACPI_SUCCESS(status) ? 0 : -EFAULT;
131}
132
133
134/**
135 * acpi_pm_finish - Finish up suspend sequence.
136 * @pm_state: State we're coming out of.
137 *
138 * This is called after we wake back up (or if entering the sleep state
139 * failed).
140 */
141
142static int acpi_pm_finish(suspend_state_t pm_state)
143{
144 u32 acpi_state = acpi_suspend_states[pm_state];
145
146 acpi_leave_sleep_state(acpi_state);
147 acpi_disable_wakeup_device(acpi_state);
148
149 /* reset firmware waking vector */
150 acpi_set_firmware_waking_vector((acpi_physical_address) 0);
151
152 if (init_8259A_after_S1) {
153 printk("Broken toshiba laptop -> kicking interrupts\n");
154 init_8259A(0);
155 }
156 return 0;
157}
158
159
160int acpi_suspend(u32 acpi_state)
161{
162 suspend_state_t states[] = {
163 [1] = PM_SUSPEND_STANDBY,
164 [3] = PM_SUSPEND_MEM,
165 [4] = PM_SUSPEND_DISK,
166 };
167
168 if (acpi_state <= 4 && states[acpi_state])
169 return pm_suspend(states[acpi_state]);
170 return -EINVAL;
171}
172
173static struct pm_ops acpi_pm_ops = {
174 .prepare = acpi_pm_prepare,
175 .enter = acpi_pm_enter,
176 .finish = acpi_pm_finish,
177};
178
179
180/*
181 * Toshiba fails to preserve interrupts over S1, reinitialization
182 * of 8259 is needed after S1 resume.
183 */
184static int __init init_ints_after_s1(struct dmi_system_id *d)
185{
186 printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
187 init_8259A_after_S1 = 1;
188 return 0;
189}
190
191static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
192 {
193 .callback = init_ints_after_s1,
194 .ident = "Toshiba Satellite 4030cdt",
195 .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"), },
196 },
197 { },
198};
199
200static int __init acpi_sleep_init(void)
201{
202 int i = 0;
203
204 dmi_check_system(acpisleep_dmi_table);
205
206 if (acpi_disabled)
207 return 0;
208
209 printk(KERN_INFO PREFIX "(supports");
210 for (i=0; i < ACPI_S_STATE_COUNT; i++) {
211 acpi_status status;
212 u8 type_a, type_b;
213 status = acpi_get_sleep_type_data(i, &type_a, &type_b);
214 if (ACPI_SUCCESS(status)) {
215 sleep_states[i] = 1;
216 printk(" S%d", i);
217 }
218 if (i == ACPI_STATE_S4) {
219 if (acpi_gbl_FACS->S4bios_f) {
220 sleep_states[i] = 1;
221 printk(" S4bios");
222 acpi_pm_ops.pm_disk_mode = PM_DISK_FIRMWARE;
223 }
224 if (sleep_states[i])
225 acpi_pm_ops.pm_disk_mode = PM_DISK_PLATFORM;
226 }
227 }
228 printk(")\n");
229
230 pm_set_ops(&acpi_pm_ops);
231 return 0;
232}
233
234late_initcall(acpi_sleep_init);
diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c
new file mode 100644
index 000000000000..da237754ded9
--- /dev/null
+++ b/drivers/acpi/sleep/poweroff.c
@@ -0,0 +1,39 @@
1/*
2 * poweroff.c - ACPI handler for powering off the system.
3 *
4 * AKA S5, but it is independent of whether or not the kernel supports
5 * any other sleep support in the system.
6 */
7
8#include <linux/pm.h>
9#include <linux/init.h>
10#include <acpi/acpi_bus.h>
11#include <linux/sched.h>
12#include "sleep.h"
13
14static void
15acpi_power_off (void)
16{
17 printk("%s called\n",__FUNCTION__);
18 /* Some SMP machines only can poweroff in boot CPU */
19 set_cpus_allowed(current, cpumask_of_cpu(0));
20 acpi_wakeup_gpe_poweroff_prepare();
21 acpi_enter_sleep_state_prep(ACPI_STATE_S5);
22 ACPI_DISABLE_IRQS();
23 acpi_enter_sleep_state(ACPI_STATE_S5);
24}
25
26static int acpi_poweroff_init(void)
27{
28 if (!acpi_disabled) {
29 u8 type_a, type_b;
30 acpi_status status;
31
32 status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
33 if (ACPI_SUCCESS(status))
34 pm_power_off = acpi_power_off;
35 }
36 return 0;
37}
38
39late_initcall(acpi_poweroff_init);
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
new file mode 100644
index 000000000000..fd7c5a0649af
--- /dev/null
+++ b/drivers/acpi/sleep/proc.c
@@ -0,0 +1,509 @@
1#include <linux/proc_fs.h>
2#include <linux/seq_file.h>
3#include <linux/suspend.h>
4#include <linux/bcd.h>
5#include <asm/uaccess.h>
6
7#include <acpi/acpi_bus.h>
8#include <acpi/acpi_drivers.h>
9
10#ifdef CONFIG_X86
11#include <linux/mc146818rtc.h>
12#endif
13
14#include "sleep.h"
15
16#define ACPI_SYSTEM_FILE_SLEEP "sleep"
17#define ACPI_SYSTEM_FILE_ALARM "alarm"
18#define ACPI_SYSTEM_FILE_WAKEUP_DEVICE "wakeup"
19
20#define _COMPONENT ACPI_SYSTEM_COMPONENT
21ACPI_MODULE_NAME ("sleep")
22
23
24static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
25{
26 int i;
27
28 ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");
29
30 for (i = 0; i <= ACPI_STATE_S5; i++) {
31 if (sleep_states[i]) {
32 seq_printf(seq,"S%d ", i);
33 if (i == ACPI_STATE_S4 && acpi_gbl_FACS->S4bios_f)
34 seq_printf(seq, "S4bios ");
35 }
36 }
37
38 seq_puts(seq, "\n");
39
40 return 0;
41}
42
43static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file)
44{
45 return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data);
46}
47
48static ssize_t
49acpi_system_write_sleep (
50 struct file *file,
51 const char __user *buffer,
52 size_t count,
53 loff_t *ppos)
54{
55 char str[12];
56 u32 state = 0;
57 int error = 0;
58
59 if (count > sizeof(str) - 1)
60 goto Done;
61 memset(str,0,sizeof(str));
62 if (copy_from_user(str, buffer, count))
63 return -EFAULT;
64
65 /* Check for S4 bios request */
66 if (!strcmp(str,"4b")) {
67 error = acpi_suspend(4);
68 goto Done;
69 }
70 state = simple_strtoul(str, NULL, 0);
71#ifdef CONFIG_SOFTWARE_SUSPEND
72 if (state == 4) {
73 error = software_suspend();
74 goto Done;
75 }
76#endif
77 error = acpi_suspend(state);
78 Done:
79 return error ? error : count;
80}
81
82static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
83{
84 u32 sec, min, hr;
85 u32 day, mo, yr;
86 unsigned char rtc_control = 0;
87 unsigned long flags;
88
89 ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
90
91 spin_lock_irqsave(&rtc_lock, flags);
92
93 sec = CMOS_READ(RTC_SECONDS_ALARM);
94 min = CMOS_READ(RTC_MINUTES_ALARM);
95 hr = CMOS_READ(RTC_HOURS_ALARM);
96 rtc_control = CMOS_READ(RTC_CONTROL);
97
98 /* If we ever get an FACP with proper values... */
99 if (acpi_gbl_FADT->day_alrm)
100 /* ACPI spec: only low 6 its should be cared */
101 day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 0x3F;
102 else
103 day = CMOS_READ(RTC_DAY_OF_MONTH);
104 if (acpi_gbl_FADT->mon_alrm)
105 mo = CMOS_READ(acpi_gbl_FADT->mon_alrm);
106 else
107 mo = CMOS_READ(RTC_MONTH);
108 if (acpi_gbl_FADT->century)
109 yr = CMOS_READ(acpi_gbl_FADT->century) * 100 + CMOS_READ(RTC_YEAR);
110 else
111 yr = CMOS_READ(RTC_YEAR);
112
113 spin_unlock_irqrestore(&rtc_lock, flags);
114
115 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
116 BCD_TO_BIN(sec);
117 BCD_TO_BIN(min);
118 BCD_TO_BIN(hr);
119 BCD_TO_BIN(day);
120 BCD_TO_BIN(mo);
121 BCD_TO_BIN(yr);
122 }
123
124 /* we're trusting the FADT (see above)*/
125 if (!acpi_gbl_FADT->century)
126 /* If we're not trusting the FADT, we should at least make it
127 * right for _this_ century... ehm, what is _this_ century?
128 *
129 * TBD:
130 * ASAP: find piece of code in the kernel, e.g. star tracker driver,
131 * which we can trust to determine the century correctly. Atom
132 * watch driver would be nice, too...
133 *
134 * if that has not happened, change for first release in 2050:
135 * if (yr<50)
136 * yr += 2100;
137 * else
138 * yr += 2000; // current line of code
139 *
140 * if that has not happened either, please do on 2099/12/31:23:59:59
141 * s/2000/2100
142 *
143 */
144 yr += 2000;
145
146 seq_printf(seq,"%4.4u-", yr);
147 (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
148 (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
149 (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
150 (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
151 (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
152
153 return 0;
154}
155
156static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
157{
158 return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
159}
160
161
162static int
163get_date_field (
164 char **p,
165 u32 *value)
166{
167 char *next = NULL;
168 char *string_end = NULL;
169 int result = -EINVAL;
170
171 /*
172 * Try to find delimeter, only to insert null. The end of the
173 * string won't have one, but is still valid.
174 */
175 next = strpbrk(*p, "- :");
176 if (next)
177 *next++ = '\0';
178
179 *value = simple_strtoul(*p, &string_end, 10);
180
181 /* Signal success if we got a good digit */
182 if (string_end != *p)
183 result = 0;
184
185 if (next)
186 *p = next;
187
188 return result;
189}
190
191
192static ssize_t
193acpi_system_write_alarm (
194 struct file *file,
195 const char __user *buffer,
196 size_t count,
197 loff_t *ppos)
198{
199 int result = 0;
200 char alarm_string[30] = {'\0'};
201 char *p = alarm_string;
202 u32 sec, min, hr, day, mo, yr;
203 int adjust = 0;
204 unsigned char rtc_control = 0;
205
206 ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
207
208 if (count > sizeof(alarm_string) - 1)
209 return_VALUE(-EINVAL);
210
211 if (copy_from_user(alarm_string, buffer, count))
212 return_VALUE(-EFAULT);
213
214 alarm_string[count] = '\0';
215
216 /* check for time adjustment */
217 if (alarm_string[0] == '+') {
218 p++;
219 adjust = 1;
220 }
221
222 if ((result = get_date_field(&p, &yr)))
223 goto end;
224 if ((result = get_date_field(&p, &mo)))
225 goto end;
226 if ((result = get_date_field(&p, &day)))
227 goto end;
228 if ((result = get_date_field(&p, &hr)))
229 goto end;
230 if ((result = get_date_field(&p, &min)))
231 goto end;
232 if ((result = get_date_field(&p, &sec)))
233 goto end;
234
235 if (sec > 59) {
236 min += 1;
237 sec -= 60;
238 }
239 if (min > 59) {
240 hr += 1;
241 min -= 60;
242 }
243 if (hr > 23) {
244 day += 1;
245 hr -= 24;
246 }
247 if (day > 31) {
248 mo += 1;
249 day -= 31;
250 }
251 if (mo > 12) {
252 yr += 1;
253 mo -= 12;
254 }
255
256 spin_lock_irq(&rtc_lock);
257
258 rtc_control = CMOS_READ(RTC_CONTROL);
259 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
260 BIN_TO_BCD(yr);
261 BIN_TO_BCD(mo);
262 BIN_TO_BCD(day);
263 BIN_TO_BCD(hr);
264 BIN_TO_BCD(min);
265 BIN_TO_BCD(sec);
266 }
267
268 if (adjust) {
269 yr += CMOS_READ(RTC_YEAR);
270 mo += CMOS_READ(RTC_MONTH);
271 day += CMOS_READ(RTC_DAY_OF_MONTH);
272 hr += CMOS_READ(RTC_HOURS);
273 min += CMOS_READ(RTC_MINUTES);
274 sec += CMOS_READ(RTC_SECONDS);
275 }
276
277 spin_unlock_irq(&rtc_lock);
278
279 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
280 BCD_TO_BIN(yr);
281 BCD_TO_BIN(mo);
282 BCD_TO_BIN(day);
283 BCD_TO_BIN(hr);
284 BCD_TO_BIN(min);
285 BCD_TO_BIN(sec);
286 }
287
288 if (sec > 59) {
289 min++;
290 sec -= 60;
291 }
292 if (min > 59) {
293 hr++;
294 min -= 60;
295 }
296 if (hr > 23) {
297 day++;
298 hr -= 24;
299 }
300 if (day > 31) {
301 mo++;
302 day -= 31;
303 }
304 if (mo > 12) {
305 yr++;
306 mo -= 12;
307 }
308 if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
309 BIN_TO_BCD(yr);
310 BIN_TO_BCD(mo);
311 BIN_TO_BCD(day);
312 BIN_TO_BCD(hr);
313 BIN_TO_BCD(min);
314 BIN_TO_BCD(sec);
315 }
316
317 spin_lock_irq(&rtc_lock);
318 /*
319 * Disable alarm interrupt before setting alarm timer or else
320 * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
321 */
322 rtc_control &= ~RTC_AIE;
323 CMOS_WRITE(rtc_control, RTC_CONTROL);
324 CMOS_READ(RTC_INTR_FLAGS);
325
326 /* write the fields the rtc knows about */
327 CMOS_WRITE(hr, RTC_HOURS_ALARM);
328 CMOS_WRITE(min, RTC_MINUTES_ALARM);
329 CMOS_WRITE(sec, RTC_SECONDS_ALARM);
330
331 /*
332 * If the system supports an enhanced alarm it will have non-zero
333 * offsets into the CMOS RAM here -- which for some reason are pointing
334 * to the RTC area of memory.
335 */
336 if (acpi_gbl_FADT->day_alrm)
337 CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
338 if (acpi_gbl_FADT->mon_alrm)
339 CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
340 if (acpi_gbl_FADT->century)
341 CMOS_WRITE(yr/100, acpi_gbl_FADT->century);
342 /* enable the rtc alarm interrupt */
343 rtc_control |= RTC_AIE;
344 CMOS_WRITE(rtc_control, RTC_CONTROL);
345 CMOS_READ(RTC_INTR_FLAGS);
346
347 spin_unlock_irq(&rtc_lock);
348
349 acpi_clear_event(ACPI_EVENT_RTC);
350 acpi_enable_event(ACPI_EVENT_RTC, 0);
351
352 *ppos += count;
353
354 result = 0;
355end:
356 return_VALUE(result ? result : count);
357}
358
359extern struct list_head acpi_wakeup_device_list;
360extern spinlock_t acpi_device_lock;
361
362static int
363acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
364{
365 struct list_head * node, * next;
366
367 seq_printf(seq, "Device Sleep state Status\n");
368
369 spin_lock(&acpi_device_lock);
370 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
371 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
372
373 if (!dev->wakeup.flags.valid)
374 continue;
375 spin_unlock(&acpi_device_lock);
376 if (dev->wakeup.flags.run_wake)
377 seq_printf(seq, "%4s %4d %8s\n",
378 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
379 dev->wakeup.state.enabled ? "*enabled" : "*disabled");
380 else
381 seq_printf(seq, "%4s %4d %8s\n",
382 dev->pnp.bus_id, (u32) dev->wakeup.sleep_state,
383 dev->wakeup.state.enabled ? "enabled" : "disabled");
384 spin_lock(&acpi_device_lock);
385 }
386 spin_unlock(&acpi_device_lock);
387 return 0;
388}
389
390static ssize_t
391acpi_system_write_wakeup_device (
392 struct file *file,
393 const char __user *buffer,
394 size_t count,
395 loff_t *ppos)
396{
397 struct list_head * node, * next;
398 char strbuf[5];
399 char str[5] = "";
400 int len = count;
401 struct acpi_device *found_dev = NULL;
402
403 if (len > 4) len = 4;
404
405 if (copy_from_user(strbuf, buffer, len))
406 return -EFAULT;
407 strbuf[len] = '\0';
408 sscanf(strbuf, "%s", str);
409
410 spin_lock(&acpi_device_lock);
411 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
412 struct acpi_device * dev = container_of(node, struct acpi_device, wakeup_list);
413 if (!dev->wakeup.flags.valid)
414 continue;
415
416 if (!strncmp(dev->pnp.bus_id, str, 4)) {
417 dev->wakeup.state.enabled = dev->wakeup.state.enabled ? 0:1;
418 found_dev = dev;
419 break;
420 }
421 }
422 if (found_dev) {
423 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
424 struct acpi_device * dev = container_of(node,
425 struct acpi_device, wakeup_list);
426
427 if ((dev != found_dev) &&
428 (dev->wakeup.gpe_number == found_dev->wakeup.gpe_number) &&
429 (dev->wakeup.gpe_device == found_dev->wakeup.gpe_device)) {
430 printk(KERN_WARNING "ACPI: '%s' and '%s' have the same GPE, "
431 "can't disable/enable one seperately\n",
432 dev->pnp.bus_id, found_dev->pnp.bus_id);
433 dev->wakeup.state.enabled = found_dev->wakeup.state.enabled;
434 }
435 }
436 }
437 spin_unlock(&acpi_device_lock);
438 return count;
439}
440
441static int
442acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
443{
444 return single_open(file, acpi_system_wakeup_device_seq_show, PDE(inode)->data);
445}
446
447static struct file_operations acpi_system_wakeup_device_fops = {
448 .open = acpi_system_wakeup_device_open_fs,
449 .read = seq_read,
450 .write = acpi_system_write_wakeup_device,
451 .llseek = seq_lseek,
452 .release = single_release,
453};
454
455static struct file_operations acpi_system_sleep_fops = {
456 .open = acpi_system_sleep_open_fs,
457 .read = seq_read,
458 .write = acpi_system_write_sleep,
459 .llseek = seq_lseek,
460 .release = single_release,
461};
462
463static struct file_operations acpi_system_alarm_fops = {
464 .open = acpi_system_alarm_open_fs,
465 .read = seq_read,
466 .write = acpi_system_write_alarm,
467 .llseek = seq_lseek,
468 .release = single_release,
469};
470
471
472static u32 rtc_handler(void * context)
473{
474 acpi_clear_event(ACPI_EVENT_RTC);
475 acpi_disable_event(ACPI_EVENT_RTC, 0);
476
477 return ACPI_INTERRUPT_HANDLED;
478}
479
480static int acpi_sleep_proc_init(void)
481{
482 struct proc_dir_entry *entry = NULL;
483
484 if (acpi_disabled)
485 return 0;
486
487 /* 'sleep' [R/W]*/
488 entry = create_proc_entry(ACPI_SYSTEM_FILE_SLEEP,
489 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
490 if (entry)
491 entry->proc_fops = &acpi_system_sleep_fops;
492
493 /* 'alarm' [R/W] */
494 entry = create_proc_entry(ACPI_SYSTEM_FILE_ALARM,
495 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
496 if (entry)
497 entry->proc_fops = &acpi_system_alarm_fops;
498
499 /* 'wakeup device' [R/W]*/
500 entry = create_proc_entry(ACPI_SYSTEM_FILE_WAKEUP_DEVICE,
501 S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir);
502 if (entry)
503 entry->proc_fops = &acpi_system_wakeup_device_fops;
504
505 acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
506 return 0;
507}
508
509late_initcall(acpi_sleep_proc_init);
diff --git a/drivers/acpi/sleep/sleep.h b/drivers/acpi/sleep/sleep.h
new file mode 100644
index 000000000000..efd0001c6f05
--- /dev/null
+++ b/drivers/acpi/sleep/sleep.h
@@ -0,0 +1,8 @@
1
2extern u8 sleep_states[];
3extern int acpi_suspend (u32 state);
4
5extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
6extern void acpi_enable_wakeup_device(u8 sleep_state);
7extern void acpi_disable_wakeup_device(u8 sleep_state);
8extern void acpi_wakeup_gpe_poweroff_prepare(void);
diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c
new file mode 100644
index 000000000000..d9b199969d5d
--- /dev/null
+++ b/drivers/acpi/sleep/wakeup.c
@@ -0,0 +1,209 @@
1/*
2 * wakeup.c - support wakeup devices
3 * Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com>
4 */
5
6#include <linux/init.h>
7#include <linux/acpi.h>
8#include <acpi/acpi_drivers.h>
9#include <linux/kernel.h>
10#include <linux/types.h>
11#include <acpi/acevents.h>
12#include "sleep.h"
13
14#define _COMPONENT ACPI_SYSTEM_COMPONENT
15ACPI_MODULE_NAME ("wakeup_devices")
16
17extern struct list_head acpi_wakeup_device_list;
18extern spinlock_t acpi_device_lock;
19
20#ifdef CONFIG_ACPI_SLEEP
21/**
22 * acpi_enable_wakeup_device_prep - prepare wakeup devices
23 * @sleep_state: ACPI state
24 * Enable all wakup devices power if the devices' wakeup level
25 * is higher than requested sleep level
26 */
27
28void
29acpi_enable_wakeup_device_prep(
30 u8 sleep_state)
31{
32 struct list_head * node, * next;
33
34 ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device_prep");
35
36 spin_lock(&acpi_device_lock);
37 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
38 struct acpi_device * dev = container_of(node,
39 struct acpi_device, wakeup_list);
40
41 if (!dev->wakeup.flags.valid ||
42 !dev->wakeup.state.enabled ||
43 (sleep_state > (u32) dev->wakeup.sleep_state))
44 continue;
45
46 spin_unlock(&acpi_device_lock);
47 acpi_enable_wakeup_device_power(dev);
48 spin_lock(&acpi_device_lock);
49 }
50 spin_unlock(&acpi_device_lock);
51}
52
53/**
54 * acpi_enable_wakeup_device - enable wakeup devices
55 * @sleep_state: ACPI state
56 * Enable all wakup devices's GPE
57 */
58void
59acpi_enable_wakeup_device(
60 u8 sleep_state)
61{
62 struct list_head * node, * next;
63
64 /*
65 * Caution: this routine must be invoked when interrupt is disabled
66 * Refer ACPI2.0: P212
67 */
68 ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device");
69 spin_lock(&acpi_device_lock);
70 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
71 struct acpi_device * dev = container_of(node,
72 struct acpi_device, wakeup_list);
73
74 /* If users want to disable run-wake GPE,
75 * we only disable it for wake and leave it for runtime
76 */
77 if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) {
78 spin_unlock(&acpi_device_lock);
79 acpi_set_gpe_type(dev->wakeup.gpe_device,
80 dev->wakeup.gpe_number, ACPI_GPE_TYPE_RUNTIME);
81 /* Re-enable it, since set_gpe_type will disable it */
82 acpi_enable_gpe(dev->wakeup.gpe_device,
83 dev->wakeup.gpe_number, ACPI_ISR);
84 spin_lock(&acpi_device_lock);
85 continue;
86 }
87
88 if (!dev->wakeup.flags.valid ||
89 !dev->wakeup.state.enabled ||
90 (sleep_state > (u32) dev->wakeup.sleep_state))
91 continue;
92
93 spin_unlock(&acpi_device_lock);
94 /* run-wake GPE has been enabled */
95 if (!dev->wakeup.flags.run_wake)
96 acpi_enable_gpe(dev->wakeup.gpe_device,
97 dev->wakeup.gpe_number, ACPI_ISR);
98 dev->wakeup.state.active = 1;
99 spin_lock(&acpi_device_lock);
100 }
101 spin_unlock(&acpi_device_lock);
102}
103
104/**
105 * acpi_disable_wakeup_device - disable devices' wakeup capability
106 * @sleep_state: ACPI state
107 * Disable all wakup devices's GPE and wakeup capability
108 */
109void
110acpi_disable_wakeup_device (
111 u8 sleep_state)
112{
113 struct list_head * node, * next;
114
115 ACPI_FUNCTION_TRACE("acpi_disable_wakeup_device");
116
117 spin_lock(&acpi_device_lock);
118 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
119 struct acpi_device * dev = container_of(node,
120 struct acpi_device, wakeup_list);
121
122 if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) {
123 spin_unlock(&acpi_device_lock);
124 acpi_set_gpe_type(dev->wakeup.gpe_device,
125 dev->wakeup.gpe_number, ACPI_GPE_TYPE_WAKE_RUN);
126 /* Re-enable it, since set_gpe_type will disable it */
127 acpi_enable_gpe(dev->wakeup.gpe_device,
128 dev->wakeup.gpe_number, ACPI_NOT_ISR);
129 spin_lock(&acpi_device_lock);
130 continue;
131 }
132
133 if (!dev->wakeup.flags.valid ||
134 !dev->wakeup.state.active ||
135 (sleep_state > (u32) dev->wakeup.sleep_state))
136 continue;
137
138 spin_unlock(&acpi_device_lock);
139 acpi_disable_wakeup_device_power(dev);
140 /* Never disable run-wake GPE */
141 if (!dev->wakeup.flags.run_wake) {
142 acpi_disable_gpe(dev->wakeup.gpe_device,
143 dev->wakeup.gpe_number, ACPI_NOT_ISR);
144 acpi_clear_gpe(dev->wakeup.gpe_device,
145 dev->wakeup.gpe_number, ACPI_NOT_ISR);
146 }
147 dev->wakeup.state.active = 0;
148 spin_lock(&acpi_device_lock);
149 }
150 spin_unlock(&acpi_device_lock);
151}
152
153static int __init acpi_wakeup_device_init(void)
154{
155 struct list_head * node, * next;
156
157 if (acpi_disabled)
158 return 0;
159 printk("ACPI wakeup devices: \n");
160
161 spin_lock(&acpi_device_lock);
162 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
163 struct acpi_device * dev = container_of(node,
164 struct acpi_device, wakeup_list);
165
166 /* In case user doesn't load button driver */
167 if (dev->wakeup.flags.run_wake && !dev->wakeup.state.enabled) {
168 spin_unlock(&acpi_device_lock);
169 acpi_set_gpe_type(dev->wakeup.gpe_device,
170 dev->wakeup.gpe_number, ACPI_GPE_TYPE_WAKE_RUN);
171 acpi_enable_gpe(dev->wakeup.gpe_device,
172 dev->wakeup.gpe_number, ACPI_NOT_ISR);
173 dev->wakeup.state.enabled = 1;
174 spin_lock(&acpi_device_lock);
175 }
176 printk("%4s ", dev->pnp.bus_id);
177 }
178 spin_unlock(&acpi_device_lock);
179 printk("\n");
180
181 return 0;
182}
183
184late_initcall(acpi_wakeup_device_init);
185#endif
186
187/*
188 * Disable all wakeup GPEs before power off.
189 *
190 * Since acpi_enter_sleep_state() will disable all
191 * RUNTIME GPEs, we simply mark all GPES that
192 * are not enabled for wakeup from S5 as RUNTIME.
193 */
194void acpi_wakeup_gpe_poweroff_prepare(void)
195{
196 struct list_head * node, * next;
197
198 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
199 struct acpi_device * dev = container_of(node,
200 struct acpi_device, wakeup_list);
201
202 /* The GPE can wakeup system from S5, don't touch it */
203 if ((u32)dev->wakeup.sleep_state == ACPI_STATE_S5)
204 continue;
205 /* acpi_set_gpe_type will automatically disable GPE */
206 acpi_set_gpe_type(dev->wakeup.gpe_device,
207 dev->wakeup.gpe_number, ACPI_GPE_TYPE_RUNTIME);
208 }
209}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 11:45:04 -0500