small fixes

server/drivers/CFontz633.c

@@ -402,7 +402,7 @@ CFontz633_flush (Driver *drvthis)
 			out[0] = (unsigned char) (i % p->width);	// column
 			out[1] = (unsigned char) (i / p->width);	// line
 			out[2] = p->framebuf[i];			// character
-			send_bytes_message(fd, CF633_Send_Data_to_LCD, 3, out);
+			send_bytes_message(p->fd, CF633_Send_Data_to_LCD, 3, out);
 			p->backingstore[i] = p->framebuf[i];
 		}
 	}

server/drivers/CFontz633io.c

@@ -165,6 +165,16 @@ send_packet(int fd, COMMAND_PACKET *out)
 
 
 /** calculate CRC over given buffer with given length */
+/* According to the "Painless Guide to CRC error dectectin algorithmsi
+ * (http://www.repairfaq.org/filipg/LINK/F_crc_v3.html) this is the table driven
+ * implementation of a CRC with the following parameters:
+ * - WIDTH:  16		(16 bit CRC)
+ * - POLY:   0x1021	(generating polynomial)
+ * - INIT:   0xFFFF	(seed value for the register when starting the algorithm)
+ * - REFIN:  TRUE	(reflect [i.e. bit-swap] each input byte before being processed) 
+ * - REFOUT: TRUE	(reflect [i.e. bit-swap] the result before the XOROUT phase)
+ * - XOROUT: 0xFFFF	(value to xor the result before returning it as crc)
+ */ 
 static int
 get_crc(char *buf, int len, int seed)
 {
@@ -210,10 +220,10 @@ get_crc(char *buf, int len, int seed)
 
 	/* This algorithm is based on the IrDA LAP example */
 	while (len-- > 0)
-		newCrc = (newCrc >> 8) ^ crcLookupTable[(newCrc ^ *buf++) & 0xff];
+		newCrc = (newCrc >> 8) ^ crcLookupTable[(newCrc ^ *buf++) & 0xFF];
 
 	/* Make this crc match the one's complement that is sent in the packet */
-	return (~newCrc);
+	return ((~newCrc) & 0xFFFF);
 }
 
 
@@ -395,7 +405,7 @@ test_packet(int fd, unsigned char response)
 		while (is_msg != GIVE_UP) {
 			if (is_msg == GOOD_MSG) {
 				treat_packet();
-				// do we need treat_packet at all ?
+				// do we need treat_packet as separate function ?
 				if (incoming_command.command == response)
         	                        response_received = 1;
 			}	
@@ -505,7 +515,6 @@ check_for_packet(int fd, unsigned char expected_length)
 	//Compute the expected CheckSum
 	testcrc = get_crc((unsigned char *) &incoming_command,
 			  incoming_command.data_length+2, 0xFFFF);
-	testcrc = testcrc & 0xFFFF; /* This is TRICKY */
 
 	if (incoming_command.crc.as_word == testcrc) {
 		//This is a good packet. I'll be horn swaggled. Remove the packet

server/drivers/svgalib_drv.c

@@ -307,7 +307,7 @@ svgalib_drv_init (Driver *drvthis)
 
 	/* initialize svgalib library */
 	if (vga_init() != 0) {
-		report(RPT_ERR, "svga: ivga_niti() failed.");
+		report(RPT_ERR, "svga: vga_init() failed.");
 		return -1;
 	}	
 

server/drivers/svgalib_drv.h

@@ -30,6 +30,8 @@ MODULE_EXPORT int  svgalib_drv_init (Driver *drvthis);
 MODULE_EXPORT void svgalib_drv_close (Driver *drvthis);
 MODULE_EXPORT int  svgalib_drv_width (Driver *drvthis);
 MODULE_EXPORT int  svgalib_drv_height (Driver *drvthis);
+MODULE_EXPORT int  svgalib_drv_cellwidth (Driver *drvthis);
+MODULE_EXPORT int  svgalib_drv_cellheight (Driver *drvthis);
 MODULE_EXPORT void svgalib_drv_clear (Driver *drvthis);
 MODULE_EXPORT void svgalib_drv_flush (Driver *drvthis);
 MODULE_EXPORT void svgalib_drv_string (Driver *drvthis, int x, int y, char string[]);