diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2007-02-09 12:08:58 -0500 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2007-02-09 12:08:58 -0500 |
commit | 75e7153abd220f1c4a731a9613fb705485b56aa8 (patch) | |
tree | 6bdebced27c0ebc6d13061346168ec0556cce6c8 /arch | |
parent | 7726942fb15edd46e4fe8ab37f9a99795191e585 (diff) |
[APM] ARM: Convert to use shared APM emulation.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/Kconfig | 29 | ||||
-rw-r--r-- | arch/arm/common/sharpsl_pm.c | 2 | ||||
-rw-r--r-- | arch/arm/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/kernel/apm.c | 672 | ||||
-rw-r--r-- | arch/arm/mach-pxa/corgi_pm.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-pxa/sharpsl_pm.c | 2 | ||||
-rw-r--r-- | arch/arm/mach-pxa/spitz_pm.c | 2 |
7 files changed, 8 insertions, 702 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 6783c2e5512d..1523046e092b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig | |||
@@ -9,6 +9,7 @@ config ARM | |||
9 | bool | 9 | bool |
10 | default y | 10 | default y |
11 | select RTC_LIB | 11 | select RTC_LIB |
12 | select SYS_SUPPORTS_APM_EMULATION | ||
12 | help | 13 | help |
13 | The ARM series is a line of low-power-consumption RISC chip designs | 14 | The ARM series is a line of low-power-consumption RISC chip designs |
14 | licensed by ARM Ltd and targeted at embedded applications and | 15 | licensed by ARM Ltd and targeted at embedded applications and |
@@ -17,6 +18,9 @@ config ARM | |||
17 | Europe. There is an ARM Linux project with a web page at | 18 | Europe. There is an ARM Linux project with a web page at |
18 | <http://www.arm.linux.org.uk/>. | 19 | <http://www.arm.linux.org.uk/>. |
19 | 20 | ||
21 | config SYS_SUPPORTS_APM_EMULATION | ||
22 | bool | ||
23 | |||
20 | config GENERIC_TIME | 24 | config GENERIC_TIME |
21 | bool | 25 | bool |
22 | default n | 26 | default n |
@@ -856,31 +860,6 @@ menu "Power management options" | |||
856 | 860 | ||
857 | source "kernel/power/Kconfig" | 861 | source "kernel/power/Kconfig" |
858 | 862 | ||
859 | config APM | ||
860 | tristate "Advanced Power Management Emulation" | ||
861 | ---help--- | ||
862 | APM is a BIOS specification for saving power using several different | ||
863 | techniques. This is mostly useful for battery powered laptops with | ||
864 | APM compliant BIOSes. If you say Y here, the system time will be | ||
865 | reset after a RESUME operation, the /proc/apm device will provide | ||
866 | battery status information, and user-space programs will receive | ||
867 | notification of APM "events" (e.g. battery status change). | ||
868 | |||
869 | In order to use APM, you will need supporting software. For location | ||
870 | and more information, read <file:Documentation/pm.txt> and the | ||
871 | Battery Powered Linux mini-HOWTO, available from | ||
872 | <http://www.tldp.org/docs.html#howto>. | ||
873 | |||
874 | This driver does not spin down disk drives (see the hdparm(8) | ||
875 | manpage ("man 8 hdparm") for that), and it doesn't turn off | ||
876 | VESA-compliant "green" monitors. | ||
877 | |||
878 | Generally, if you don't have a battery in your machine, there isn't | ||
879 | much point in using this driver and you should say N. If you get | ||
880 | random kernel OOPSes or reboots that don't seem to be related to | ||
881 | anything, try disabling/enabling this option (or disabling/enabling | ||
882 | APM in your BIOS). | ||
883 | |||
884 | endmenu | 863 | endmenu |
885 | 864 | ||
886 | source "net/Kconfig" | 865 | source "net/Kconfig" |
diff --git a/arch/arm/common/sharpsl_pm.c b/arch/arm/common/sharpsl_pm.c index b3599743093b..a3b450f8ef17 100644 --- a/arch/arm/common/sharpsl_pm.c +++ b/arch/arm/common/sharpsl_pm.c | |||
@@ -27,7 +27,7 @@ | |||
27 | #include <asm/hardware.h> | 27 | #include <asm/hardware.h> |
28 | #include <asm/mach-types.h> | 28 | #include <asm/mach-types.h> |
29 | #include <asm/irq.h> | 29 | #include <asm/irq.h> |
30 | #include <asm/apm.h> | 30 | #include <asm/apm-emulation.h> |
31 | #include <asm/arch/pm.h> | 31 | #include <asm/arch/pm.h> |
32 | #include <asm/arch/pxa-regs.h> | 32 | #include <asm/arch/pxa-regs.h> |
33 | #include <asm/arch/sharpsl.h> | 33 | #include <asm/arch/sharpsl.h> |
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index ab06a86e85d5..1b935fb94b83 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile | |||
@@ -10,7 +10,6 @@ obj-y := compat.o entry-armv.o entry-common.o irq.o \ | |||
10 | process.o ptrace.o semaphore.o setup.o signal.o sys_arm.o \ | 10 | process.o ptrace.o semaphore.o setup.o signal.o sys_arm.o \ |
11 | time.o traps.o | 11 | time.o traps.o |
12 | 12 | ||
13 | obj-$(CONFIG_APM) += apm.o | ||
14 | obj-$(CONFIG_ISA_DMA_API) += dma.o | 13 | obj-$(CONFIG_ISA_DMA_API) += dma.o |
15 | obj-$(CONFIG_ARCH_ACORN) += ecard.o | 14 | obj-$(CONFIG_ARCH_ACORN) += ecard.o |
16 | obj-$(CONFIG_FIQ) += fiq.o | 15 | obj-$(CONFIG_FIQ) += fiq.o |
diff --git a/arch/arm/kernel/apm.c b/arch/arm/kernel/apm.c deleted file mode 100644 index 2c37b70b17ab..000000000000 --- a/arch/arm/kernel/apm.c +++ /dev/null | |||
@@ -1,672 +0,0 @@ | |||
1 | /* | ||
2 | * bios-less APM driver for ARM Linux | ||
3 | * Jamey Hicks <jamey@crl.dec.com> | ||
4 | * adapted from the APM BIOS driver for Linux by Stephen Rothwell (sfr@linuxcare.com) | ||
5 | * | ||
6 | * APM 1.2 Reference: | ||
7 | * Intel Corporation, Microsoft Corporation. Advanced Power Management | ||
8 | * (APM) BIOS Interface Specification, Revision 1.2, February 1996. | ||
9 | * | ||
10 | * [This document is available from Microsoft at: | ||
11 | * http://www.microsoft.com/hwdev/busbios/amp_12.htm] | ||
12 | */ | ||
13 | #include <linux/module.h> | ||
14 | #include <linux/poll.h> | ||
15 | #include <linux/slab.h> | ||
16 | #include <linux/proc_fs.h> | ||
17 | #include <linux/miscdevice.h> | ||
18 | #include <linux/apm_bios.h> | ||
19 | #include <linux/capability.h> | ||
20 | #include <linux/sched.h> | ||
21 | #include <linux/pm.h> | ||
22 | #include <linux/device.h> | ||
23 | #include <linux/kernel.h> | ||
24 | #include <linux/list.h> | ||
25 | #include <linux/init.h> | ||
26 | #include <linux/completion.h> | ||
27 | #include <linux/kthread.h> | ||
28 | #include <linux/delay.h> | ||
29 | |||
30 | #include <asm/apm.h> /* apm_power_info */ | ||
31 | #include <asm/system.h> | ||
32 | |||
33 | /* | ||
34 | * The apm_bios device is one of the misc char devices. | ||
35 | * This is its minor number. | ||
36 | */ | ||
37 | #define APM_MINOR_DEV 134 | ||
38 | |||
39 | /* | ||
40 | * See Documentation/Config.help for the configuration options. | ||
41 | * | ||
42 | * Various options can be changed at boot time as follows: | ||
43 | * (We allow underscores for compatibility with the modules code) | ||
44 | * apm=on/off enable/disable APM | ||
45 | */ | ||
46 | |||
47 | /* | ||
48 | * Maximum number of events stored | ||
49 | */ | ||
50 | #define APM_MAX_EVENTS 16 | ||
51 | |||
52 | struct apm_queue { | ||
53 | unsigned int event_head; | ||
54 | unsigned int event_tail; | ||
55 | apm_event_t events[APM_MAX_EVENTS]; | ||
56 | }; | ||
57 | |||
58 | /* | ||
59 | * The per-file APM data | ||
60 | */ | ||
61 | struct apm_user { | ||
62 | struct list_head list; | ||
63 | |||
64 | unsigned int suser: 1; | ||
65 | unsigned int writer: 1; | ||
66 | unsigned int reader: 1; | ||
67 | |||
68 | int suspend_result; | ||
69 | unsigned int suspend_state; | ||
70 | #define SUSPEND_NONE 0 /* no suspend pending */ | ||
71 | #define SUSPEND_PENDING 1 /* suspend pending read */ | ||
72 | #define SUSPEND_READ 2 /* suspend read, pending ack */ | ||
73 | #define SUSPEND_ACKED 3 /* suspend acked */ | ||
74 | #define SUSPEND_WAIT 4 /* waiting for suspend */ | ||
75 | #define SUSPEND_DONE 5 /* suspend completed */ | ||
76 | |||
77 | struct apm_queue queue; | ||
78 | }; | ||
79 | |||
80 | /* | ||
81 | * Local variables | ||
82 | */ | ||
83 | static int suspends_pending; | ||
84 | static int apm_disabled; | ||
85 | static struct task_struct *kapmd_tsk; | ||
86 | |||
87 | static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue); | ||
88 | static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue); | ||
89 | |||
90 | /* | ||
91 | * This is a list of everyone who has opened /dev/apm_bios | ||
92 | */ | ||
93 | static DECLARE_RWSEM(user_list_lock); | ||
94 | static LIST_HEAD(apm_user_list); | ||
95 | |||
96 | /* | ||
97 | * kapmd info. kapmd provides us a process context to handle | ||
98 | * "APM" events within - specifically necessary if we're going | ||
99 | * to be suspending the system. | ||
100 | */ | ||
101 | static DECLARE_WAIT_QUEUE_HEAD(kapmd_wait); | ||
102 | static DEFINE_SPINLOCK(kapmd_queue_lock); | ||
103 | static struct apm_queue kapmd_queue; | ||
104 | |||
105 | static DEFINE_MUTEX(state_lock); | ||
106 | |||
107 | static const char driver_version[] = "1.13"; /* no spaces */ | ||
108 | |||
109 | |||
110 | |||
111 | /* | ||
112 | * Compatibility cruft until the IPAQ people move over to the new | ||
113 | * interface. | ||
114 | */ | ||
115 | static void __apm_get_power_status(struct apm_power_info *info) | ||
116 | { | ||
117 | } | ||
118 | |||
119 | /* | ||
120 | * This allows machines to provide their own "apm get power status" function. | ||
121 | */ | ||
122 | void (*apm_get_power_status)(struct apm_power_info *) = __apm_get_power_status; | ||
123 | EXPORT_SYMBOL(apm_get_power_status); | ||
124 | |||
125 | |||
126 | /* | ||
127 | * APM event queue management. | ||
128 | */ | ||
129 | static inline int queue_empty(struct apm_queue *q) | ||
130 | { | ||
131 | return q->event_head == q->event_tail; | ||
132 | } | ||
133 | |||
134 | static inline apm_event_t queue_get_event(struct apm_queue *q) | ||
135 | { | ||
136 | q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS; | ||
137 | return q->events[q->event_tail]; | ||
138 | } | ||
139 | |||
140 | static void queue_add_event(struct apm_queue *q, apm_event_t event) | ||
141 | { | ||
142 | q->event_head = (q->event_head + 1) % APM_MAX_EVENTS; | ||
143 | if (q->event_head == q->event_tail) { | ||
144 | static int notified; | ||
145 | |||
146 | if (notified++ == 0) | ||
147 | printk(KERN_ERR "apm: an event queue overflowed\n"); | ||
148 | q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS; | ||
149 | } | ||
150 | q->events[q->event_head] = event; | ||
151 | } | ||
152 | |||
153 | static void queue_event(apm_event_t event) | ||
154 | { | ||
155 | struct apm_user *as; | ||
156 | |||
157 | down_read(&user_list_lock); | ||
158 | list_for_each_entry(as, &apm_user_list, list) { | ||
159 | if (as->reader) | ||
160 | queue_add_event(&as->queue, event); | ||
161 | } | ||
162 | up_read(&user_list_lock); | ||
163 | wake_up_interruptible(&apm_waitqueue); | ||
164 | } | ||
165 | |||
166 | /* | ||
167 | * queue_suspend_event - queue an APM suspend event. | ||
168 | * | ||
169 | * Check that we're in a state where we can suspend. If not, | ||
170 | * return -EBUSY. Otherwise, queue an event to all "writer" | ||
171 | * users. If there are no "writer" users, return '1' to | ||
172 | * indicate that we can immediately suspend. | ||
173 | */ | ||
174 | static int queue_suspend_event(apm_event_t event, struct apm_user *sender) | ||
175 | { | ||
176 | struct apm_user *as; | ||
177 | int ret = 1; | ||
178 | |||
179 | mutex_lock(&state_lock); | ||
180 | down_read(&user_list_lock); | ||
181 | |||
182 | /* | ||
183 | * If a thread is still processing, we can't suspend, so reject | ||
184 | * the request. | ||
185 | */ | ||
186 | list_for_each_entry(as, &apm_user_list, list) { | ||
187 | if (as != sender && as->reader && as->writer && as->suser && | ||
188 | as->suspend_state != SUSPEND_NONE) { | ||
189 | ret = -EBUSY; | ||
190 | goto out; | ||
191 | } | ||
192 | } | ||
193 | |||
194 | list_for_each_entry(as, &apm_user_list, list) { | ||
195 | if (as != sender && as->reader && as->writer && as->suser) { | ||
196 | as->suspend_state = SUSPEND_PENDING; | ||
197 | suspends_pending++; | ||
198 | queue_add_event(&as->queue, event); | ||
199 | ret = 0; | ||
200 | } | ||
201 | } | ||
202 | out: | ||
203 | up_read(&user_list_lock); | ||
204 | mutex_unlock(&state_lock); | ||
205 | wake_up_interruptible(&apm_waitqueue); | ||
206 | return ret; | ||
207 | } | ||
208 | |||
209 | static void apm_suspend(void) | ||
210 | { | ||
211 | struct apm_user *as; | ||
212 | int err = pm_suspend(PM_SUSPEND_MEM); | ||
213 | |||
214 | /* | ||
215 | * Anyone on the APM queues will think we're still suspended. | ||
216 | * Send a message so everyone knows we're now awake again. | ||
217 | */ | ||
218 | queue_event(APM_NORMAL_RESUME); | ||
219 | |||
220 | /* | ||
221 | * Finally, wake up anyone who is sleeping on the suspend. | ||
222 | */ | ||
223 | mutex_lock(&state_lock); | ||
224 | down_read(&user_list_lock); | ||
225 | list_for_each_entry(as, &apm_user_list, list) { | ||
226 | if (as->suspend_state == SUSPEND_WAIT || | ||
227 | as->suspend_state == SUSPEND_ACKED) { | ||
228 | as->suspend_result = err; | ||
229 | as->suspend_state = SUSPEND_DONE; | ||
230 | } | ||
231 | } | ||
232 | up_read(&user_list_lock); | ||
233 | mutex_unlock(&state_lock); | ||
234 | |||
235 | wake_up(&apm_suspend_waitqueue); | ||
236 | } | ||
237 | |||
238 | static ssize_t apm_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos) | ||
239 | { | ||
240 | struct apm_user *as = fp->private_data; | ||
241 | apm_event_t event; | ||
242 | int i = count, ret = 0; | ||
243 | |||
244 | if (count < sizeof(apm_event_t)) | ||
245 | return -EINVAL; | ||
246 | |||
247 | if (queue_empty(&as->queue) && fp->f_flags & O_NONBLOCK) | ||
248 | return -EAGAIN; | ||
249 | |||
250 | wait_event_interruptible(apm_waitqueue, !queue_empty(&as->queue)); | ||
251 | |||
252 | while ((i >= sizeof(event)) && !queue_empty(&as->queue)) { | ||
253 | event = queue_get_event(&as->queue); | ||
254 | |||
255 | ret = -EFAULT; | ||
256 | if (copy_to_user(buf, &event, sizeof(event))) | ||
257 | break; | ||
258 | |||
259 | mutex_lock(&state_lock); | ||
260 | if (as->suspend_state == SUSPEND_PENDING && | ||
261 | (event == APM_SYS_SUSPEND || event == APM_USER_SUSPEND)) | ||
262 | as->suspend_state = SUSPEND_READ; | ||
263 | mutex_unlock(&state_lock); | ||
264 | |||
265 | buf += sizeof(event); | ||
266 | i -= sizeof(event); | ||
267 | } | ||
268 | |||
269 | if (i < count) | ||
270 | ret = count - i; | ||
271 | |||
272 | return ret; | ||
273 | } | ||
274 | |||
275 | static unsigned int apm_poll(struct file *fp, poll_table * wait) | ||
276 | { | ||
277 | struct apm_user *as = fp->private_data; | ||
278 | |||
279 | poll_wait(fp, &apm_waitqueue, wait); | ||
280 | return queue_empty(&as->queue) ? 0 : POLLIN | POLLRDNORM; | ||
281 | } | ||
282 | |||
283 | /* | ||
284 | * apm_ioctl - handle APM ioctl | ||
285 | * | ||
286 | * APM_IOC_SUSPEND | ||
287 | * This IOCTL is overloaded, and performs two functions. It is used to: | ||
288 | * - initiate a suspend | ||
289 | * - acknowledge a suspend read from /dev/apm_bios. | ||
290 | * Only when everyone who has opened /dev/apm_bios with write permission | ||
291 | * has acknowledge does the actual suspend happen. | ||
292 | */ | ||
293 | static int | ||
294 | apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg) | ||
295 | { | ||
296 | struct apm_user *as = filp->private_data; | ||
297 | unsigned long flags; | ||
298 | int err = -EINVAL; | ||
299 | |||
300 | if (!as->suser || !as->writer) | ||
301 | return -EPERM; | ||
302 | |||
303 | switch (cmd) { | ||
304 | case APM_IOC_SUSPEND: | ||
305 | mutex_lock(&state_lock); | ||
306 | |||
307 | as->suspend_result = -EINTR; | ||
308 | |||
309 | if (as->suspend_state == SUSPEND_READ) { | ||
310 | int pending; | ||
311 | |||
312 | /* | ||
313 | * If we read a suspend command from /dev/apm_bios, | ||
314 | * then the corresponding APM_IOC_SUSPEND ioctl is | ||
315 | * interpreted as an acknowledge. | ||
316 | */ | ||
317 | as->suspend_state = SUSPEND_ACKED; | ||
318 | suspends_pending--; | ||
319 | pending = suspends_pending == 0; | ||
320 | mutex_unlock(&state_lock); | ||
321 | |||
322 | /* | ||
323 | * If there are no further acknowledges required, | ||
324 | * suspend the system. | ||
325 | */ | ||
326 | if (pending) | ||
327 | apm_suspend(); | ||
328 | |||
329 | /* | ||
330 | * Wait for the suspend/resume to complete. If there | ||
331 | * are pending acknowledges, we wait here for them. | ||
332 | * | ||
333 | * Note: we need to ensure that the PM subsystem does | ||
334 | * not kick us out of the wait when it suspends the | ||
335 | * threads. | ||
336 | */ | ||
337 | flags = current->flags; | ||
338 | current->flags |= PF_NOFREEZE; | ||
339 | |||
340 | wait_event(apm_suspend_waitqueue, | ||
341 | as->suspend_state == SUSPEND_DONE); | ||
342 | } else { | ||
343 | as->suspend_state = SUSPEND_WAIT; | ||
344 | mutex_unlock(&state_lock); | ||
345 | |||
346 | /* | ||
347 | * Otherwise it is a request to suspend the system. | ||
348 | * Queue an event for all readers, and expect an | ||
349 | * acknowledge from all writers who haven't already | ||
350 | * acknowledged. | ||
351 | */ | ||
352 | err = queue_suspend_event(APM_USER_SUSPEND, as); | ||
353 | if (err < 0) { | ||
354 | /* | ||
355 | * Avoid taking the lock here - this | ||
356 | * should be fine. | ||
357 | */ | ||
358 | as->suspend_state = SUSPEND_NONE; | ||
359 | break; | ||
360 | } | ||
361 | |||
362 | if (err > 0) | ||
363 | apm_suspend(); | ||
364 | |||
365 | /* | ||
366 | * Wait for the suspend/resume to complete. If there | ||
367 | * are pending acknowledges, we wait here for them. | ||
368 | * | ||
369 | * Note: we need to ensure that the PM subsystem does | ||
370 | * not kick us out of the wait when it suspends the | ||
371 | * threads. | ||
372 | */ | ||
373 | flags = current->flags; | ||
374 | current->flags |= PF_NOFREEZE; | ||
375 | |||
376 | wait_event_interruptible(apm_suspend_waitqueue, | ||
377 | as->suspend_state == SUSPEND_DONE); | ||
378 | } | ||
379 | |||
380 | current->flags = flags; | ||
381 | |||
382 | mutex_lock(&state_lock); | ||
383 | err = as->suspend_result; | ||
384 | as->suspend_state = SUSPEND_NONE; | ||
385 | mutex_unlock(&state_lock); | ||
386 | break; | ||
387 | } | ||
388 | |||
389 | return err; | ||
390 | } | ||
391 | |||
392 | static int apm_release(struct inode * inode, struct file * filp) | ||
393 | { | ||
394 | struct apm_user *as = filp->private_data; | ||
395 | int pending = 0; | ||
396 | |||
397 | filp->private_data = NULL; | ||
398 | |||
399 | down_write(&user_list_lock); | ||
400 | list_del(&as->list); | ||
401 | up_write(&user_list_lock); | ||
402 | |||
403 | /* | ||
404 | * We are now unhooked from the chain. As far as new | ||
405 | * events are concerned, we no longer exist. However, we | ||
406 | * need to balance suspends_pending, which means the | ||
407 | * possibility of sleeping. | ||
408 | */ | ||
409 | mutex_lock(&state_lock); | ||
410 | if (as->suspend_state != SUSPEND_NONE) { | ||
411 | suspends_pending -= 1; | ||
412 | pending = suspends_pending == 0; | ||
413 | } | ||
414 | mutex_unlock(&state_lock); | ||
415 | if (pending) | ||
416 | apm_suspend(); | ||
417 | |||
418 | kfree(as); | ||
419 | return 0; | ||
420 | } | ||
421 | |||
422 | static int apm_open(struct inode * inode, struct file * filp) | ||
423 | { | ||
424 | struct apm_user *as; | ||
425 | |||
426 | as = kzalloc(sizeof(*as), GFP_KERNEL); | ||
427 | if (as) { | ||
428 | /* | ||
429 | * XXX - this is a tiny bit broken, when we consider BSD | ||
430 | * process accounting. If the device is opened by root, we | ||
431 | * instantly flag that we used superuser privs. Who knows, | ||
432 | * we might close the device immediately without doing a | ||
433 | * privileged operation -- cevans | ||
434 | */ | ||
435 | as->suser = capable(CAP_SYS_ADMIN); | ||
436 | as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE; | ||
437 | as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ; | ||
438 | |||
439 | down_write(&user_list_lock); | ||
440 | list_add(&as->list, &apm_user_list); | ||
441 | up_write(&user_list_lock); | ||
442 | |||
443 | filp->private_data = as; | ||
444 | } | ||
445 | |||
446 | return as ? 0 : -ENOMEM; | ||
447 | } | ||
448 | |||
449 | static struct file_operations apm_bios_fops = { | ||
450 | .owner = THIS_MODULE, | ||
451 | .read = apm_read, | ||
452 | .poll = apm_poll, | ||
453 | .ioctl = apm_ioctl, | ||
454 | .open = apm_open, | ||
455 | .release = apm_release, | ||
456 | }; | ||
457 | |||
458 | static struct miscdevice apm_device = { | ||
459 | .minor = APM_MINOR_DEV, | ||
460 | .name = "apm_bios", | ||
461 | .fops = &apm_bios_fops | ||
462 | }; | ||
463 | |||
464 | |||
465 | #ifdef CONFIG_PROC_FS | ||
466 | /* | ||
467 | * Arguments, with symbols from linux/apm_bios.h. | ||
468 | * | ||
469 | * 0) Linux driver version (this will change if format changes) | ||
470 | * 1) APM BIOS Version. Usually 1.0, 1.1 or 1.2. | ||
471 | * 2) APM flags from APM Installation Check (0x00): | ||
472 | * bit 0: APM_16_BIT_SUPPORT | ||
473 | * bit 1: APM_32_BIT_SUPPORT | ||
474 | * bit 2: APM_IDLE_SLOWS_CLOCK | ||
475 | * bit 3: APM_BIOS_DISABLED | ||
476 | * bit 4: APM_BIOS_DISENGAGED | ||
477 | * 3) AC line status | ||
478 | * 0x00: Off-line | ||
479 | * 0x01: On-line | ||
480 | * 0x02: On backup power (BIOS >= 1.1 only) | ||
481 | * 0xff: Unknown | ||
482 | * 4) Battery status | ||
483 | * 0x00: High | ||
484 | * 0x01: Low | ||
485 | * 0x02: Critical | ||
486 | * 0x03: Charging | ||
487 | * 0x04: Selected battery not present (BIOS >= 1.2 only) | ||
488 | * 0xff: Unknown | ||
489 | * 5) Battery flag | ||
490 | * bit 0: High | ||
491 | * bit 1: Low | ||
492 | * bit 2: Critical | ||
493 | * bit 3: Charging | ||
494 | * bit 7: No system battery | ||
495 | * 0xff: Unknown | ||
496 | * 6) Remaining battery life (percentage of charge): | ||
497 | * 0-100: valid | ||
498 | * -1: Unknown | ||
499 | * 7) Remaining battery life (time units): | ||
500 | * Number of remaining minutes or seconds | ||
501 | * -1: Unknown | ||
502 | * 8) min = minutes; sec = seconds | ||
503 | */ | ||
504 | static int apm_get_info(char *buf, char **start, off_t fpos, int length) | ||
505 | { | ||
506 | struct apm_power_info info; | ||
507 | char *units; | ||
508 | int ret; | ||
509 | |||
510 | info.ac_line_status = 0xff; | ||
511 | info.battery_status = 0xff; | ||
512 | info.battery_flag = 0xff; | ||
513 | info.battery_life = -1; | ||
514 | info.time = -1; | ||
515 | info.units = -1; | ||
516 | |||
517 | if (apm_get_power_status) | ||
518 | apm_get_power_status(&info); | ||
519 | |||
520 | switch (info.units) { | ||
521 | default: units = "?"; break; | ||
522 | case 0: units = "min"; break; | ||
523 | case 1: units = "sec"; break; | ||
524 | } | ||
525 | |||
526 | ret = sprintf(buf, "%s 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n", | ||
527 | driver_version, APM_32_BIT_SUPPORT, | ||
528 | info.ac_line_status, info.battery_status, | ||
529 | info.battery_flag, info.battery_life, | ||
530 | info.time, units); | ||
531 | |||
532 | return ret; | ||
533 | } | ||
534 | #endif | ||
535 | |||
536 | static int kapmd(void *arg) | ||
537 | { | ||
538 | do { | ||
539 | apm_event_t event; | ||
540 | int ret; | ||
541 | |||
542 | wait_event_interruptible(kapmd_wait, | ||
543 | !queue_empty(&kapmd_queue) || kthread_should_stop()); | ||
544 | |||
545 | if (kthread_should_stop()) | ||
546 | break; | ||
547 | |||
548 | spin_lock_irq(&kapmd_queue_lock); | ||
549 | event = 0; | ||
550 | if (!queue_empty(&kapmd_queue)) | ||
551 | event = queue_get_event(&kapmd_queue); | ||
552 | spin_unlock_irq(&kapmd_queue_lock); | ||
553 | |||
554 | switch (event) { | ||
555 | case 0: | ||
556 | break; | ||
557 | |||
558 | case APM_LOW_BATTERY: | ||
559 | case APM_POWER_STATUS_CHANGE: | ||
560 | queue_event(event); | ||
561 | break; | ||
562 | |||
563 | case APM_USER_SUSPEND: | ||
564 | case APM_SYS_SUSPEND: | ||
565 | ret = queue_suspend_event(event, NULL); | ||
566 | if (ret < 0) { | ||
567 | /* | ||
568 | * We were busy. Try again in 50ms. | ||
569 | */ | ||
570 | queue_add_event(&kapmd_queue, event); | ||
571 | msleep(50); | ||
572 | } | ||
573 | if (ret > 0) | ||
574 | apm_suspend(); | ||
575 | break; | ||
576 | |||
577 | case APM_CRITICAL_SUSPEND: | ||
578 | apm_suspend(); | ||
579 | break; | ||
580 | } | ||
581 | } while (1); | ||
582 | |||
583 | return 0; | ||
584 | } | ||
585 | |||
586 | static int __init apm_init(void) | ||
587 | { | ||
588 | int ret; | ||
589 | |||
590 | if (apm_disabled) { | ||
591 | printk(KERN_NOTICE "apm: disabled on user request.\n"); | ||
592 | return -ENODEV; | ||
593 | } | ||
594 | |||
595 | kapmd_tsk = kthread_create(kapmd, NULL, "kapmd"); | ||
596 | if (IS_ERR(kapmd_tsk)) { | ||
597 | ret = PTR_ERR(kapmd_tsk); | ||
598 | kapmd_tsk = NULL; | ||
599 | return ret; | ||
600 | } | ||
601 | kapmd_tsk->flags |= PF_NOFREEZE; | ||
602 | wake_up_process(kapmd_tsk); | ||
603 | |||
604 | #ifdef CONFIG_PROC_FS | ||
605 | create_proc_info_entry("apm", 0, NULL, apm_get_info); | ||
606 | #endif | ||
607 | |||
608 | ret = misc_register(&apm_device); | ||
609 | if (ret != 0) { | ||
610 | remove_proc_entry("apm", NULL); | ||
611 | kthread_stop(kapmd_tsk); | ||
612 | } | ||
613 | |||
614 | return ret; | ||
615 | } | ||
616 | |||
617 | static void __exit apm_exit(void) | ||
618 | { | ||
619 | misc_deregister(&apm_device); | ||
620 | remove_proc_entry("apm", NULL); | ||
621 | |||
622 | kthread_stop(kapmd_tsk); | ||
623 | } | ||
624 | |||
625 | module_init(apm_init); | ||
626 | module_exit(apm_exit); | ||
627 | |||
628 | MODULE_AUTHOR("Stephen Rothwell"); | ||
629 | MODULE_DESCRIPTION("Advanced Power Management"); | ||
630 | MODULE_LICENSE("GPL"); | ||
631 | |||
632 | #ifndef MODULE | ||
633 | static int __init apm_setup(char *str) | ||
634 | { | ||
635 | while ((str != NULL) && (*str != '\0')) { | ||
636 | if (strncmp(str, "off", 3) == 0) | ||
637 | apm_disabled = 1; | ||
638 | if (strncmp(str, "on", 2) == 0) | ||
639 | apm_disabled = 0; | ||
640 | str = strchr(str, ','); | ||
641 | if (str != NULL) | ||
642 | str += strspn(str, ", \t"); | ||
643 | } | ||
644 | return 1; | ||
645 | } | ||
646 | |||
647 | __setup("apm=", apm_setup); | ||
648 | #endif | ||
649 | |||
650 | /** | ||
651 | * apm_queue_event - queue an APM event for kapmd | ||
652 | * @event: APM event | ||
653 | * | ||
654 | * Queue an APM event for kapmd to process and ultimately take the | ||
655 | * appropriate action. Only a subset of events are handled: | ||
656 | * %APM_LOW_BATTERY | ||
657 | * %APM_POWER_STATUS_CHANGE | ||
658 | * %APM_USER_SUSPEND | ||
659 | * %APM_SYS_SUSPEND | ||
660 | * %APM_CRITICAL_SUSPEND | ||
661 | */ | ||
662 | void apm_queue_event(apm_event_t event) | ||
663 | { | ||
664 | unsigned long flags; | ||
665 | |||
666 | spin_lock_irqsave(&kapmd_queue_lock, flags); | ||
667 | queue_add_event(&kapmd_queue, event); | ||
668 | spin_unlock_irqrestore(&kapmd_queue_lock, flags); | ||
669 | |||
670 | wake_up_interruptible(&kapmd_wait); | ||
671 | } | ||
672 | EXPORT_SYMBOL(apm_queue_event); | ||
diff --git a/arch/arm/mach-pxa/corgi_pm.c b/arch/arm/mach-pxa/corgi_pm.c index 4c3de4008a43..165017de8d0d 100644 --- a/arch/arm/mach-pxa/corgi_pm.c +++ b/arch/arm/mach-pxa/corgi_pm.c | |||
@@ -16,7 +16,7 @@ | |||
16 | #include <linux/delay.h> | 16 | #include <linux/delay.h> |
17 | #include <linux/interrupt.h> | 17 | #include <linux/interrupt.h> |
18 | #include <linux/platform_device.h> | 18 | #include <linux/platform_device.h> |
19 | #include <asm/apm.h> | 19 | #include <asm/apm-emulation.h> |
20 | #include <asm/irq.h> | 20 | #include <asm/irq.h> |
21 | #include <asm/mach-types.h> | 21 | #include <asm/mach-types.h> |
22 | #include <asm/hardware.h> | 22 | #include <asm/hardware.h> |
diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c index db6e8f56a75f..b1d8cfca245a 100644 --- a/arch/arm/mach-pxa/sharpsl_pm.c +++ b/arch/arm/mach-pxa/sharpsl_pm.c | |||
@@ -23,7 +23,7 @@ | |||
23 | 23 | ||
24 | #include <asm/hardware.h> | 24 | #include <asm/hardware.h> |
25 | #include <asm/mach-types.h> | 25 | #include <asm/mach-types.h> |
26 | #include <asm/apm.h> | 26 | #include <asm/apm-emulation.h> |
27 | #include <asm/arch/pm.h> | 27 | #include <asm/arch/pm.h> |
28 | #include <asm/arch/pxa-regs.h> | 28 | #include <asm/arch/pxa-regs.h> |
29 | #include <asm/arch/sharpsl.h> | 29 | #include <asm/arch/sharpsl.h> |
diff --git a/arch/arm/mach-pxa/spitz_pm.c b/arch/arm/mach-pxa/spitz_pm.c index 40be833079c7..b97d543d9364 100644 --- a/arch/arm/mach-pxa/spitz_pm.c +++ b/arch/arm/mach-pxa/spitz_pm.c | |||
@@ -16,7 +16,7 @@ | |||
16 | #include <linux/delay.h> | 16 | #include <linux/delay.h> |
17 | #include <linux/interrupt.h> | 17 | #include <linux/interrupt.h> |
18 | #include <linux/platform_device.h> | 18 | #include <linux/platform_device.h> |
19 | #include <asm/apm.h> | 19 | #include <asm/apm-emulation.h> |
20 | #include <asm/irq.h> | 20 | #include <asm/irq.h> |
21 | #include <asm/mach-types.h> | 21 | #include <asm/mach-types.h> |
22 | #include <asm/hardware.h> | 22 | #include <asm/hardware.h> |