# Copyright (C) 2006 Alessandro Di Marco
#
# LazyCD is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; version 2 of the License.
#
# LazyCD is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along
# with LazyCD; if not, write to the Free Software Foundation, Inc., 51
# Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
--- old/smartdimmer/src/smartdimmer.c	2005-07-24 05:13:46.000000000 +0200
+++ new/smartdimmer/src/smartdimmer.c	2006-12-20 23:38:51.000000000 +0100
@@ -6,6 +6,8 @@
  *                                                                            *
  * July 23, 2005                                                              *
  * Erik Waling <erikw@acc.umu.se>                                             *
+ *                                                                            *
+ * Fading logic by Alessandro Di Marco <dmr@c0nc3pt.com>                      *
  ******************************************************************************/
 
 #include <stdlib.h>
@@ -16,6 +18,8 @@
 
 static struct option long_opts[] = {
     { "get"     , no_argument      , 0, 'g' },
+    { "fade"    , required_argument, 0, 'f' },
+    { "delay"   , required_argument, 0, 'e' },
     { "set"     , required_argument, 0, 's' },
     { "increase", no_argument      , 0, 'i' },
     { "decrease", no_argument      , 0, 'd' },
@@ -30,6 +34,8 @@
     printf("Options:\n");
     printf("\t-g  --get\t\tQuery brightness level.\n");
     printf("\t-s  --set <level>\tSet brightness level (%d-%d)\n", MIN_LEVEL, MAX_LEVEL);
+    printf("\t-f  --fade <level>\tFade in/out up to the given brightness level (%d-%d)\n", MIN_LEVEL, MAX_LEVEL);
+    printf("\t-e  --delay <usecs>\tFade cycle delay\n");
     printf("\t-i  --increase\t\tIncrease brightness with one level.\n");
     printf("\t-d  --decrease\t\tDecrease brightness with one level.\n");
     printf("\t-h  --help\t\tPrints this help text.\n\n");
@@ -46,6 +52,27 @@
     nv_card.PMC[PMC_SMARTDIM_OFFSET/4] = (level << SMARTDIM_SHIFT) | (nv_card.PMC[PMC_SMARTDIM_OFFSET/4] & ~SMARTDIM_MASK); 
 }
 
+void sd_fade_level(int end, unsigned long delay) {
+    int i, start = sd_get_level();
+
+    if (end < MIN_LEVEL)
+	end = MIN_LEVEL;
+    if (end > MAX_LEVEL)
+	end = MAX_LEVEL;
+
+    if (end >= start) {
+	for (i = start + 1; i <= end; i++) {
+	    nv_card.PMC[PMC_SMARTDIM_OFFSET/4] = (i << SMARTDIM_SHIFT) | (nv_card.PMC[PMC_SMARTDIM_OFFSET/4] & ~SMARTDIM_MASK);
+	    usleep(delay);
+	}
+    } else {
+	for (i = start - 1; i >= end; i--) {
+	    nv_card.PMC[PMC_SMARTDIM_OFFSET/4] = (i << SMARTDIM_SHIFT) | (nv_card.PMC[PMC_SMARTDIM_OFFSET/4] & ~SMARTDIM_MASK);
+	    usleep(delay);
+	}
+    }
+}
+
 int sd_get_level() {
     return (nv_card.PMC[PMC_SMARTDIM_OFFSET/4] & SMARTDIM_MASK) >> SMARTDIM_SHIFT;
 }
@@ -65,6 +92,7 @@
 int main(int argc, char *argv[]) {
     
     int optind = 0, options = 0, setvalue = 0;
+    unsigned long delay = 7000;
     int c;
     
     if (argc < 2) {
@@ -72,7 +100,7 @@
         return 0;
     }
     
-    while ((c = getopt_long(argc, argv, "gs:idh", long_opts, &optind)) != -1) {
+    while ((c = getopt_long(argc, argv, "gf:s:e:idh", long_opts, &optind)) != -1) {
         switch (c) {
             case '?':
                 fprintf(stderr, "\nTry `%s --help' for help.\n", argv[0]);
@@ -93,6 +121,26 @@
                    return 1;
                }
                break;
+	    case 'e':
+	       if (isdigit(*optarg)) {
+		   delay = atol(optarg);
+		   options |= DEL_BIT;
+	       } else {
+		   fprintf(stderr, "Illegal option value (-e): "
+			   "Value has to be a non-negative number.\n");
+		   return 1;
+	       }
+	       break;
+	    case 'f':
+	       if (isdigit(*optarg)) {
+		   setvalue = atoi(optarg);
+		   options |= FAD_BIT;
+	       } else {
+		   fprintf(stderr, "Illegal option value (-f): "
+			   "Value has to be a non-negative number.\n");
+		   return 1;
+	       }
+	       break;
             case 'i':
                options |= INC_BIT;
                break;
@@ -102,7 +150,7 @@
         }
     } 
     
-    if (!options) {
+    if (!options || ((options & DEL_BIT) && !(options & FAD_BIT))) {
         sd_usage(argv[0]);
         return 1;
     }
@@ -125,6 +173,9 @@
     if (options & SET_BIT)
         sd_set_level(setvalue);
     
+    if (options & FAD_BIT)
+	sd_fade_level(setvalue, delay);
+
     if (options & GET_BIT)
         printf("SmartDimmer level: %d\n", sd_get_level());
     
--- old/smartdimmer/src/smartdimmer.h	2005-07-24 05:11:50.000000000 +0200
+++ new/smartdimmer/src/smartdimmer.h	2006-12-20 23:23:07.000000000 +0100
@@ -27,9 +27,12 @@
 #define GET_BIT    2
 #define INC_BIT    4
 #define DEC_BIT    8
+#define FAD_BIT    16
+#define DEL_BIT    32
 
 /* function prototypes */
 void sd_set_level(int level);
+void sd_fade_level(int level, unsigned long delay);
 int sd_get_level();
 int sd_init();
 void sd_usage();