Add the apm_saver syscons screen saver module.

apm_saver uses the apm_display() routine from the apm system to
"suspend" the "display" part of the machine.

This is beneficial for some laptops (or other machines with
non-traditional displays) that choke on the 'green' saver's
effect.

Another way of looking at this is that it's the same as a screen
saver that does an 'apm -d 0' to blank the display and an 'apm -d 1'
to bring it back. One probably ought to use these commands to make
sure the effect will be correct before using it unattended.

1 files changed, 91 insertions, 0 deletions

diff --git a/sys/dev/syscons/apm/apm_saver.c b/sys/dev/syscons/apm/apm_saver.c
new file mode 100644
index 0000000..d7863ba
--- /dev/null
+++ b/sys/dev/syscons/apm/apm_saver.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 1999 Nick Sayer (who stole shamelessly from blank_saver)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification, immediately at the beginning of the file.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/consio.h>
+#include <sys/fbio.h>
+
+#include <dev/fb/fbreg.h>
+#include <dev/fb/splashreg.h>
+#include <dev/syscons/syscons.h>
+
+#include <sys/select.h>
+#include <machine/apm_bios.h>
+#include <machine/pc/bios.h>
+#include <i386/apm/apm.h>
+
+extern int apm_display __P((int newstate));                                     
+
+extern struct apm_softc apm_softc;
+
+static int blanked=0;
+
+static int
+apm_saver(video_adapter_t *adp, int blank)
+{
+	struct apm_softc *sc = &apm_softc;                                      
+
+	if (!sc->initialized || !sc->active)
+		return 0;
+
+	if (blank==blanked)
+		return 0;
+
+	blanked=blank;
+
+	apm_display(!blanked);
+
+	return 0;
+}
+
+static int
+apm_init(video_adapter_t *adp)
+{
+	struct apm_softc *sc = &apm_softc;                                      
+
+	if (!sc->initialized || !sc->active)
+		printf("WARNING: apm_saver module requires apm enabled\n");
+	return 0;
+}
+
+static int
+apm_term(video_adapter_t *adp)
+{
+	return 0;
+}
+
+static scrn_saver_t apm_module = {
+	"apm_saver", apm_init, apm_term, apm_saver, NULL,
+};
+
+SAVER_MODULE(apm_saver, apm_module);