Import ipod-time-sync from libgpod

This copies ipod-time-sync from libgpod and strips it of
unneccesary code + Makefile and README are added.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24306 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 100 insertions, 0 deletions

diff --git a/utils/time-sync/ipod-scsi.c b/utils/time-sync/ipod-scsi.c
new file mode 100644
index 0000000..163cfbc
--- /dev/null
+++ b/utils/time-sync/ipod-scsi.c
@@ -0,0 +1,100 @@
+/* Copyright (c) 2007, Christophe Fergeau  <teuf@gnome.org>
+ * Part of the libgpod project.
+ * 
+ * URL: http://www.gtkpod.org/
+ * URL: http://gtkpod.sourceforge.net/
+ *
+ * The code contained in this file is free software; you can redistribute
+ * it and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either version
+ * 2.1 of the License, or (at your option) any later version.
+ *
+ * This file 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this code; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * iTunes and iPod are trademarks of Apple
+ *
+ * This product is not supported/written/published by Apple!
+ *
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <scsi/sg_cmds.h>
+#include <endian.h>
+#include <time.h>
+
+static int do_sg_write_buffer (const char *device, void *buffer, size_t len)
+{
+    int fd;
+    size_t i;
+
+    fd = open (device, O_RDWR);
+    if (fd < 0) {
+	printf ("Couldn't open device %s\n", device);
+	return -1;
+    }
+
+    printf ("    Data Payload: ");
+    for (i = 0; i < len; i++) {
+	printf ("%02x ", *((uint8_t *)buffer+i));
+    }
+    printf ("\n");
+
+    if (sg_ll_write_buffer (fd, 1, 0, 0x0c0000, buffer, len, 1, 1) != 0) {
+	close(fd);
+	return -2;
+    }
+    close(fd);
+
+    return 0;
+}
+
+int sync_time (const char *device, struct tm *tm)
+{
+    struct iPodTime {
+	uint16_t year;
+	uint16_t days;
+	uint8_t timezone;
+	uint8_t hour;
+	uint8_t minute;
+	uint8_t second;
+	uint8_t dst;
+	uint8_t padding[3];
+    } __attribute__((__packed__));
+    struct iPodTime ipod_time;
+
+    if (tm == NULL) {
+	time_t current_time;
+	current_time = time (NULL);
+	tm = localtime (&current_time);
+    }
+
+    ipod_time.year = htobe16 (1900+tm->tm_year);
+    ipod_time.days = htobe16 (tm->tm_yday);
+    /* the timezone value is the shift east of UTC in 15 min chunks
+     * so eg. UTC+2 is 2*4 = 8
+     */
+    ipod_time.timezone = tm->tm_gmtoff / 900;
+    ipod_time.hour = tm->tm_hour;
+    ipod_time.minute = tm->tm_min;
+    ipod_time.second = tm->tm_sec;
+    if (tm->tm_isdst) {
+	ipod_time.dst = 1;
+    } else {
+	ipod_time.dst = 0;
+    }
+    memset (ipod_time.padding, 0, sizeof (ipod_time.padding));
+
+    return do_sg_write_buffer (device, &ipod_time, sizeof (ipod_time));
+}