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