- switch(cypress_request_type) {
- case CYPRESS_SET_CONFIG:
-
- /*
- * The general purpose firmware for the Cypress M8 allows for a maximum speed
- * of 57600bps (I have no idea whether DeLorme chose to use the general purpose
- * firmware or not), if you need to modify this speed setting for your own
- * project please add your own chiptype and modify the code likewise. The
- * Cypress HID->COM device will work successfully up to 115200bps (but the
- * actual throughput is around 3kBps).
- */
- if (baud_mask != priv->cbr_mask) {
- dbg("%s - baud rate is changing", __FUNCTION__);
- if ( priv->chiptype == CT_EARTHMATE ) {
- /* 300 and 600 baud rates are supported under the generic firmware,
- * but are not used with NMEA and SiRF protocols */
-
- if ( (baud_mask == B300) || (baud_mask == B600) ) {
- err("%s - failed setting baud rate, unsupported speed",
- __FUNCTION__);
- new_baudrate = priv->baud_rate;
- } else if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
- err("%s - failed setting baud rate, unsupported speed",
- __FUNCTION__);
- new_baudrate = priv->baud_rate;
- }
- } else if (priv->chiptype == CT_CYPHIDCOM) {
- if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
- err("%s - failed setting baud rate, unsupported speed",
- __FUNCTION__);
- new_baudrate = priv->baud_rate;
- }
- } else if (priv->chiptype == CT_GENERIC) {
- if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) {
- err("%s - failed setting baud rate, unsupported speed",
- __FUNCTION__);
- new_baudrate = priv->baud_rate;
- }
- } else {
- info("%s - please define your chiptype", __FUNCTION__);
- new_baudrate = priv->baud_rate;
- }
- } else { /* baud rate not changing, keep the old */
- new_baudrate = priv->baud_rate;
- }
- dbg("%s - baud rate is being sent as %d", __FUNCTION__, new_baudrate);
-
- memset(feature_buffer, 0, 8);
- /* fill the feature_buffer with new configuration */
- *((u_int32_t *)feature_buffer) = new_baudrate;
-
- feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */
- /* 1 bit gap */
- feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */
- feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */
- feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */
- /* 1 bit gap */
- feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */
-
- dbg("%s - device is being sent this feature report:", __FUNCTION__);
- dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1],
- feature_buffer[2], feature_buffer[3], feature_buffer[4]);
-
- do {
- retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
- HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
- 0x0300, 0, feature_buffer, 8, 500);
-
- if (tries++ >= 3)
- break;
-
- if (retval == EPIPE)
- usb_clear_halt(port->serial->dev, 0x00);
- } while (retval != 8 && retval != ENODEV);
-
- if (retval != 8)
- err("%s - failed sending serial line settings - %d", __FUNCTION__, retval);
- else {
- spin_lock_irqsave(&priv->lock, flags);
- priv->baud_rate = new_baudrate;
- priv->cbr_mask = baud_mask;
- priv->current_config = feature_buffer[4];
- spin_unlock_irqrestore(&priv->lock, flags);
- }
- break;
- case CYPRESS_GET_CONFIG:
- dbg("%s - retreiving serial line settings", __FUNCTION__);
- /* set initial values in feature buffer */
- memset(feature_buffer, 0, 8);
-
- do {
- retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0),
- HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
- 0x0300, 0, feature_buffer, 8, 500);
-
- if (tries++ >= 3)
- break;
-
- if (retval == EPIPE)
- usb_clear_halt(port->serial->dev, 0x00);
- } while (retval != 5 && retval != ENODEV);
-
- if (retval != 5) {
- err("%s - failed to retreive serial line settings - %d", __FUNCTION__, retval);
- return retval;
- } else {
- spin_lock_irqsave(&priv->lock, flags);
-
- /* store the config in one byte, and later use bit masks to check values */
- priv->current_config = feature_buffer[4];
- priv->baud_rate = *((u_int32_t *)feature_buffer);
-
- if ( (priv->cbr_mask = rate_to_mask(priv->baud_rate)) == 0x40)
- dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__);
- spin_unlock_irqrestore(&priv->lock, flags);