Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/power/process.c - Functions for saving/restoring console. | |
3 | * | |
4 | * Originally from swsusp. | |
5 | */ | |
6 | ||
7 | #include <linux/vt_kern.h> | |
8 | #include <linux/kbd_kern.h> | |
9 | #include <linux/console.h> | |
10 | #include "power.h" | |
11 | ||
1da177e4 LT |
12 | #ifdef SUSPEND_CONSOLE |
13 | static int orig_fgconsole, orig_kmsg; | |
1da177e4 LT |
14 | |
15 | int pm_prepare_console(void) | |
16 | { | |
1da177e4 LT |
17 | acquire_console_sem(); |
18 | ||
19 | orig_fgconsole = fg_console; | |
20 | ||
21 | if (vc_allocate(SUSPEND_CONSOLE)) { | |
22 | /* we can't have a free VC for now. Too bad, | |
23 | * we don't want to mess the screen for now. */ | |
24 | release_console_sem(); | |
25 | return 1; | |
26 | } | |
27 | ||
28 | set_console(SUSPEND_CONSOLE); | |
29 | release_console_sem(); | |
30 | ||
31 | if (vt_waitactive(SUSPEND_CONSOLE)) { | |
32 | pr_debug("Suspend: Can't switch VCs."); | |
33 | return 1; | |
34 | } | |
35 | orig_kmsg = kmsg_redirect; | |
36 | kmsg_redirect = SUSPEND_CONSOLE; | |
1da177e4 LT |
37 | return 0; |
38 | } | |
39 | ||
40 | void pm_restore_console(void) | |
41 | { | |
1da177e4 LT |
42 | acquire_console_sem(); |
43 | set_console(orig_fgconsole); | |
44 | release_console_sem(); | |
45 | kmsg_redirect = orig_kmsg; | |
1da177e4 LT |
46 | return; |
47 | } | |
f7b8988f | 48 | #endif |