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429 lines
12 KiB
C
429 lines
12 KiB
C
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/*********************************************************************
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*
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* Filename: ircomm_tty_ioctl.c
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* Version:
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* Description:
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Thu Jun 10 14:39:09 1999
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* Modified at: Wed Jan 5 14:45:43 2000
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/termios.h>
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#include <linux/tty.h>
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#include <linux/serial.h>
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#include <asm/uaccess.h>
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#include <net/irda/irda.h>
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#include <net/irda/irmod.h>
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#include <net/irda/ircomm_core.h>
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#include <net/irda/ircomm_param.h>
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#include <net/irda/ircomm_tty_attach.h>
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#include <net/irda/ircomm_tty.h>
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#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
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/*
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* Function ircomm_tty_change_speed (driver)
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*
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* Change speed of the driver. If the remote device is a DCE, then this
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* should make it change the speed of its serial port
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*/
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static void ircomm_tty_change_speed(struct ircomm_tty_cb *self)
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{
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unsigned cflag, cval;
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int baud;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if (!self->tty || !self->tty->termios || !self->ircomm)
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return;
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cflag = self->tty->termios->c_cflag;
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/* byte size and parity */
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switch (cflag & CSIZE) {
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case CS5: cval = IRCOMM_WSIZE_5; break;
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case CS6: cval = IRCOMM_WSIZE_6; break;
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case CS7: cval = IRCOMM_WSIZE_7; break;
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case CS8: cval = IRCOMM_WSIZE_8; break;
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default: cval = IRCOMM_WSIZE_5; break;
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}
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if (cflag & CSTOPB)
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cval |= IRCOMM_2_STOP_BIT;
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if (cflag & PARENB)
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cval |= IRCOMM_PARITY_ENABLE;
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if (!(cflag & PARODD))
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cval |= IRCOMM_PARITY_EVEN;
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/* Determine divisor based on baud rate */
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baud = tty_get_baud_rate(self->tty);
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if (!baud)
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baud = 9600; /* B0 transition handled in rs_set_termios */
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self->settings.data_rate = baud;
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ircomm_param_request(self, IRCOMM_DATA_RATE, FALSE);
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/* CTS flow control flag and modem status interrupts */
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if (cflag & CRTSCTS) {
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self->flags |= ASYNC_CTS_FLOW;
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self->settings.flow_control |= IRCOMM_RTS_CTS_IN;
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/* This got me. Bummer. Jean II */
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if (self->service_type == IRCOMM_3_WIRE_RAW)
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IRDA_WARNING("%s(), enabling RTS/CTS on link that doesn't support it (3-wire-raw)\n", __FUNCTION__);
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} else {
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self->flags &= ~ASYNC_CTS_FLOW;
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self->settings.flow_control &= ~IRCOMM_RTS_CTS_IN;
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}
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if (cflag & CLOCAL)
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self->flags &= ~ASYNC_CHECK_CD;
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else
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self->flags |= ASYNC_CHECK_CD;
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#if 0
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/*
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* Set up parity check flag
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*/
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if (I_INPCK(self->tty))
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driver->read_status_mask |= LSR_FE | LSR_PE;
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if (I_BRKINT(driver->tty) || I_PARMRK(driver->tty))
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driver->read_status_mask |= LSR_BI;
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/*
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* Characters to ignore
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*/
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driver->ignore_status_mask = 0;
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if (I_IGNPAR(driver->tty))
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driver->ignore_status_mask |= LSR_PE | LSR_FE;
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if (I_IGNBRK(self->tty)) {
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self->ignore_status_mask |= LSR_BI;
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/*
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* If we're ignore parity and break indicators, ignore
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* overruns too. (For real raw support).
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*/
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if (I_IGNPAR(self->tty))
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self->ignore_status_mask |= LSR_OE;
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}
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#endif
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self->settings.data_format = cval;
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ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE);
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ircomm_param_request(self, IRCOMM_FLOW_CONTROL, TRUE);
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}
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/*
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* Function ircomm_tty_set_termios (tty, old_termios)
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*
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* This routine allows the tty driver to be notified when device's
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* termios settings have changed. Note that a well-designed tty driver
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* should be prepared to accept the case where old == NULL, and try to
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* do something rational.
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*/
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void ircomm_tty_set_termios(struct tty_struct *tty,
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struct termios *old_termios)
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{
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struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
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unsigned int cflag = tty->termios->c_cflag;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if ((cflag == old_termios->c_cflag) &&
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(RELEVANT_IFLAG(tty->termios->c_iflag) ==
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RELEVANT_IFLAG(old_termios->c_iflag)))
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{
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return;
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}
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ircomm_tty_change_speed(self);
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/* Handle transition to B0 status */
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if ((old_termios->c_cflag & CBAUD) &&
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!(cflag & CBAUD)) {
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self->settings.dte &= ~(IRCOMM_DTR|IRCOMM_RTS);
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ircomm_param_request(self, IRCOMM_DTE, TRUE);
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}
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/* Handle transition away from B0 status */
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if (!(old_termios->c_cflag & CBAUD) &&
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(cflag & CBAUD)) {
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self->settings.dte |= IRCOMM_DTR;
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if (!(tty->termios->c_cflag & CRTSCTS) ||
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!test_bit(TTY_THROTTLED, &tty->flags)) {
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self->settings.dte |= IRCOMM_RTS;
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}
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ircomm_param_request(self, IRCOMM_DTE, TRUE);
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}
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/* Handle turning off CRTSCTS */
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if ((old_termios->c_cflag & CRTSCTS) &&
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!(tty->termios->c_cflag & CRTSCTS))
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{
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tty->hw_stopped = 0;
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ircomm_tty_start(tty);
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}
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}
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/*
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* Function ircomm_tty_tiocmget (tty, file)
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*
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*
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*
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*/
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int ircomm_tty_tiocmget(struct tty_struct *tty, struct file *file)
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{
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struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
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unsigned int result;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if (tty->flags & (1 << TTY_IO_ERROR))
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return -EIO;
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result = ((self->settings.dte & IRCOMM_RTS) ? TIOCM_RTS : 0)
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| ((self->settings.dte & IRCOMM_DTR) ? TIOCM_DTR : 0)
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| ((self->settings.dce & IRCOMM_CD) ? TIOCM_CAR : 0)
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| ((self->settings.dce & IRCOMM_RI) ? TIOCM_RNG : 0)
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| ((self->settings.dce & IRCOMM_DSR) ? TIOCM_DSR : 0)
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| ((self->settings.dce & IRCOMM_CTS) ? TIOCM_CTS : 0);
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return result;
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}
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/*
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* Function ircomm_tty_tiocmset (tty, file, set, clear)
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*
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*
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*
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*/
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int ircomm_tty_tiocmset(struct tty_struct *tty, struct file *file,
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unsigned int set, unsigned int clear)
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{
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struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if (tty->flags & (1 << TTY_IO_ERROR))
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return -EIO;
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
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if (set & TIOCM_RTS)
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self->settings.dte |= IRCOMM_RTS;
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if (set & TIOCM_DTR)
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self->settings.dte |= IRCOMM_DTR;
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if (clear & TIOCM_RTS)
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self->settings.dte &= ~IRCOMM_RTS;
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if (clear & TIOCM_DTR)
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self->settings.dte &= ~IRCOMM_DTR;
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if ((set|clear) & TIOCM_RTS)
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self->settings.dte |= IRCOMM_DELTA_RTS;
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if ((set|clear) & TIOCM_DTR)
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self->settings.dte |= IRCOMM_DELTA_DTR;
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ircomm_param_request(self, IRCOMM_DTE, TRUE);
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return 0;
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}
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/*
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* Function get_serial_info (driver, retinfo)
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*
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*
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*
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*/
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static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self,
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struct serial_struct __user *retinfo)
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{
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struct serial_struct info;
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if (!retinfo)
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return -EFAULT;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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memset(&info, 0, sizeof(info));
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info.line = self->line;
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info.flags = self->flags;
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info.baud_base = self->settings.data_rate;
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info.close_delay = self->close_delay;
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info.closing_wait = self->closing_wait;
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/* For compatibility */
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info.type = PORT_16550A;
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info.port = 0;
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info.irq = 0;
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info.xmit_fifo_size = 0;
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info.hub6 = 0;
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info.custom_divisor = 0;
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if (copy_to_user(retinfo, &info, sizeof(*retinfo)))
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return -EFAULT;
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return 0;
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}
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/*
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* Function set_serial_info (driver, new_info)
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*
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*
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*
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*/
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static int ircomm_tty_set_serial_info(struct ircomm_tty_cb *self,
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struct serial_struct __user *new_info)
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{
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#if 0
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struct serial_struct new_serial;
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struct ircomm_tty_cb old_state, *state;
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
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return -EFAULT;
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state = self
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old_state = *self;
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if (!capable(CAP_SYS_ADMIN)) {
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if ((new_serial.baud_base != state->settings.data_rate) ||
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(new_serial.close_delay != state->close_delay) ||
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((new_serial.flags & ~ASYNC_USR_MASK) !=
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(self->flags & ~ASYNC_USR_MASK)))
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return -EPERM;
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state->flags = ((state->flags & ~ASYNC_USR_MASK) |
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(new_serial.flags & ASYNC_USR_MASK));
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self->flags = ((self->flags & ~ASYNC_USR_MASK) |
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(new_serial.flags & ASYNC_USR_MASK));
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/* self->custom_divisor = new_serial.custom_divisor; */
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goto check_and_exit;
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}
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/*
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* OK, past this point, all the error checking has been done.
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* At this point, we start making changes.....
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*/
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if (self->settings.data_rate != new_serial.baud_base) {
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self->settings.data_rate = new_serial.baud_base;
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ircomm_param_request(self, IRCOMM_DATA_RATE, TRUE);
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}
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self->close_delay = new_serial.close_delay * HZ/100;
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self->closing_wait = new_serial.closing_wait * HZ/100;
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/* self->custom_divisor = new_serial.custom_divisor; */
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self->flags = ((self->flags & ~ASYNC_FLAGS) |
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(new_serial.flags & ASYNC_FLAGS));
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self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
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check_and_exit:
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if (self->flags & ASYNC_INITIALIZED) {
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if (((old_state.flags & ASYNC_SPD_MASK) !=
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(self->flags & ASYNC_SPD_MASK)) ||
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(old_driver.custom_divisor != driver->custom_divisor)) {
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if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
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driver->tty->alt_speed = 57600;
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if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
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driver->tty->alt_speed = 115200;
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if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
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driver->tty->alt_speed = 230400;
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if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
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driver->tty->alt_speed = 460800;
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ircomm_tty_change_speed(driver);
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}
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}
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#endif
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return 0;
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}
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/*
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* Function ircomm_tty_ioctl (tty, file, cmd, arg)
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*
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*
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*
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*/
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int ircomm_tty_ioctl(struct tty_struct *tty, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
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int ret = 0;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
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(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
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(cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
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if (tty->flags & (1 << TTY_IO_ERROR))
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return -EIO;
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}
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switch (cmd) {
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case TIOCGSERIAL:
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ret = ircomm_tty_get_serial_info(self, (struct serial_struct __user *) arg);
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break;
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case TIOCSSERIAL:
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ret = ircomm_tty_set_serial_info(self, (struct serial_struct __user *) arg);
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break;
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case TIOCMIWAIT:
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IRDA_DEBUG(0, "(), TIOCMIWAIT, not impl!\n");
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break;
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case TIOCGICOUNT:
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IRDA_DEBUG(0, "%s(), TIOCGICOUNT not impl!\n", __FUNCTION__ );
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#if 0
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save_flags(flags); cli();
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cnow = driver->icount;
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restore_flags(flags);
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p_cuser = (struct serial_icounter_struct __user *) arg;
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if (put_user(cnow.cts, &p_cuser->cts) ||
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put_user(cnow.dsr, &p_cuser->dsr) ||
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put_user(cnow.rng, &p_cuser->rng) ||
|
||
|
put_user(cnow.dcd, &p_cuser->dcd) ||
|
||
|
put_user(cnow.rx, &p_cuser->rx) ||
|
||
|
put_user(cnow.tx, &p_cuser->tx) ||
|
||
|
put_user(cnow.frame, &p_cuser->frame) ||
|
||
|
put_user(cnow.overrun, &p_cuser->overrun) ||
|
||
|
put_user(cnow.parity, &p_cuser->parity) ||
|
||
|
put_user(cnow.brk, &p_cuser->brk) ||
|
||
|
put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
|
||
|
return -EFAULT;
|
||
|
#endif
|
||
|
return 0;
|
||
|
default:
|
||
|
ret = -ENOIOCTLCMD; /* ioctls which we must ignore */
|
||
|
}
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
|
||
|
|