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59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
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/*
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* drivers/power/process.c - Functions for saving/restoring console.
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*
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* Originally from swsusp.
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*/
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#include <linux/vt_kern.h>
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#include <linux/kbd_kern.h>
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#include <linux/console.h>
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#include "power.h"
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static int new_loglevel = 10;
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static int orig_loglevel;
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#ifdef SUSPEND_CONSOLE
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static int orig_fgconsole, orig_kmsg;
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#endif
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int pm_prepare_console(void)
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{
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orig_loglevel = console_loglevel;
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console_loglevel = new_loglevel;
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#ifdef SUSPEND_CONSOLE
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acquire_console_sem();
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orig_fgconsole = fg_console;
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if (vc_allocate(SUSPEND_CONSOLE)) {
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/* we can't have a free VC for now. Too bad,
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* we don't want to mess the screen for now. */
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release_console_sem();
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return 1;
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}
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set_console(SUSPEND_CONSOLE);
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release_console_sem();
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if (vt_waitactive(SUSPEND_CONSOLE)) {
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pr_debug("Suspend: Can't switch VCs.");
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return 1;
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}
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orig_kmsg = kmsg_redirect;
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kmsg_redirect = SUSPEND_CONSOLE;
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#endif
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return 0;
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}
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void pm_restore_console(void)
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{
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console_loglevel = orig_loglevel;
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#ifdef SUSPEND_CONSOLE
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acquire_console_sem();
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set_console(orig_fgconsole);
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release_console_sem();
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kmsg_redirect = orig_kmsg;
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#endif
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return;
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}
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