-#define IPW_SIO_RXCTL 0x00 // control bulk rx channel transmissions, value=1/0 (on/off)
-#define IPW_SIO_SET_BAUD 0x01 // set baud, value=requested ipw_sio_bxxxx
-#define IPW_SIO_SET_LINE 0x03 // set databits, parity. value=ipw_dtb_x
-#define IPW_SIO_SET_PIN 0x03 // set/clear dtr/rts value=ipw_pin_xxx
-#define IPW_SIO_POLL 0x08 // get serial port status byte, call with value=0
-#define IPW_SIO_INIT 0x11 // initializes ? value=0 (appears as first thing todo on open)
-#define IPW_SIO_PURGE 0x12 // purge all transmissions?, call with value=numchar_to_purge
-#define IPW_SIO_HANDFLOW 0x13 // set xon/xoff limits value=0, and a buffer of 0x10 bytes
-#define IPW_SIO_SETCHARS 0x13 // set the flowcontrol special chars, value=0, buf=6 bytes,
- // last 2 bytes contain flowcontrol chars e.g. 00 00 00 00 11 13
+#define IPW_SIO_RXCTL 0x00 /* control bulk rx channel transmissions, value=1/0 (on/off) */
+#define IPW_SIO_SET_BAUD 0x01 /* set baud, value=requested ipw_sio_bxxxx */
+#define IPW_SIO_SET_LINE 0x03 /* set databits, parity. value=ipw_dtb_x */
+#define IPW_SIO_SET_PIN 0x03 /* set/clear dtr/rts value=ipw_pin_xxx */
+#define IPW_SIO_POLL 0x08 /* get serial port status byte, call with value=0 */
+#define IPW_SIO_INIT 0x11 /* initializes ? value=0 (appears as first thing todo on open) */
+#define IPW_SIO_PURGE 0x12 /* purge all transmissions?, call with value=numchar_to_purge */
+#define IPW_SIO_HANDFLOW 0x13 /* set xon/xoff limits value=0, and a buffer of 0x10 bytes */
+#define IPW_SIO_SETCHARS 0x13 /* set the flowcontrol special chars, value=0, buf=6 bytes, */
+ /* last 2 bytes contain flowcontrol chars e.g. 00 00 00 00 11 13 */