- UartNumber = port->tty->index - serial->minor;
-
- if (cmd == TIOCMGET) {
- MCR_Value = port->shadowMCR;
- MSR_Value = port->shadowMSR;
-
- {
- result = ((MCR_Value & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
- /* DTR IS SET */
- | ((MCR_Value & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
- /* RTS IS SET */
- | ((MSR_Value & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
- /* CTS is set */
- | ((MSR_Value & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
- /* Carrier detect is set */
- | ((MSR_Value & SERIAL_MSR_RI) ? TIOCM_RI : 0)
- /* Ring indicator set */
- | ((MSR_Value & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
- /* DSR is set */
- if (copy_to_user
- ((unsigned int *)arg, &result,
- sizeof(unsigned int)))
- return -EFAULT;
- return 0;
-
- }
- }
-
- /* TIOCMBIS, TIOCMBIC, AND TIOCMSET */
- if (cmd == TIOCMBIS || cmd == TIOCMBIC || cmd == TIOCMSET) {
- status =
- BoxGetRegister(port->serial, UartNumber,
- MODEM_CONTROL_REGISTER, &MCR_Value);
- if (status < 0)
- return -ESPIPE;
- if (copy_from_user
- (&value, (unsigned int *)arg, sizeof(unsigned int)))
- return -EFAULT;
-
- switch (cmd) {
- case TIOCMBIS:
- if (value & TIOCM_RTS)
- MCR_Value |= SERIAL_MCR_RTS;
- if (value & TIOCM_DTR)
- MCR_Value |= SERIAL_MCR_DTR;
- if (value & TIOCM_LOOP)
- MCR_Value |= SERIAL_MCR_LOOP;
- break;
- case TIOCMBIC:
- if (value & TIOCM_RTS)
- MCR_Value &= ~SERIAL_MCR_RTS;
- if (value & TIOCM_DTR)
- MCR_Value &= ~SERIAL_MCR_DTR;
- if (value & TIOCM_LOOP)
- MCR_Value &= ~SERIAL_MCR_LOOP;
- break;
- case TIOCMSET:
- /*
- * Turn off the RTS and DTR and loopbcck and then only
- * turn on what was asked for
- */
- MCR_Value &=
- ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR |
- SERIAL_MCR_LOOP);
- if (value & TIOCM_RTS)
- MCR_Value |= SERIAL_MCR_RTS;
- if (value & TIOCM_DTR)
- MCR_Value |= SERIAL_MCR_DTR;
- if (value & TIOCM_LOOP)
- MCR_Value |= SERIAL_MCR_LOOP;
- break;
- default:
- break;
-
- }
- status =
- BoxSetRegister(port->serial, UartNumber,
- MODEM_CONTROL_REGISTER, MCR_Value);
- if (status < 0)
- return -ESPIPE;
- else {
- port->shadowMCR = MCR_Value;
- return 0;
- }
-
- }
- /**************************************************************************************/
- /** TIOCMBIS, TIOCMBIC, AND TIOCMSET end
- */
- /**************************************************************************************/