From 86464aed71025541805e7b1515541aee89879e33 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Mon, 15 Feb 1999 02:15:32 +0000 Subject: Merge with Linux 2.2.1. --- drivers/net/irda/tekram.c | 314 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 314 insertions(+) create mode 100644 drivers/net/irda/tekram.c (limited to 'drivers/net/irda/tekram.c') diff --git a/drivers/net/irda/tekram.c b/drivers/net/irda/tekram.c new file mode 100644 index 000000000..bdada4afa --- /dev/null +++ b/drivers/net/irda/tekram.c @@ -0,0 +1,314 @@ +/********************************************************************* + * + * Filename: tekram.c + * Version: 0.4 + * Description: Implementation of the Tekram IrMate IR-210B dongle + * Status: Experimental. + * Author: Dag Brattli + * Created at: Wed Oct 21 20:02:35 1998 + * Modified at: Mon Jan 18 11:30:38 1999 + * Modified by: Dag Brattli + * + * Copyright (c) 1998 Dag Brattli, All Rights Reserved. + * + * 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 + * the License, or (at your option) any later version. + * + * Neither Dag Brattli nor University of Tromsų admit liability nor + * provide warranty for any of this software. This material is + * provided "AS-IS" and at no charge. + * + ********************************************************************/ + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include +#include +#include +#include + +static void tekram_reset( struct irda_device *dev, int unused); +static void tekram_open( struct irda_device *dev, int type); +static void tekram_close( struct irda_device *dev); +static void tekram_change_speed( struct irda_device *dev, int baud); +static void tekram_init_qos( struct irda_device *idev, struct qos_info *qos); + +static struct dongle dongle = { + TEKRAM_DONGLE, + tekram_open, + tekram_close, + tekram_reset, + tekram_change_speed, + tekram_init_qos, +}; + +__initfunc(void tekram_init(void)) +{ + irtty_register_dongle( &dongle); +} + +void tekram_cleanup(void) +{ + irtty_unregister_dongle( &dongle); +} + +static void tekram_open( struct irda_device *dev, int type) +{ + strcat( dev->name, " <-> tekram"); + + MOD_INC_USE_COUNT; +} + +static void tekram_close( struct irda_device *dev) +{ + MOD_DEC_USE_COUNT; +} + +/* + * Function tekram_change_speed (tty, baud) + * + * Set the speed for the Tekram IRMate 210 type dongle. Warning, this + * function must be called with a process context! + * + * Algorithm + * 1. clear DTR + * 2. set RTS, and wait at least 7 us + * 3. send Control Byte to the IR-210 through TXD to set new baud rate + * wait until the stop bit of Control Byte is sent (for 9600 baud rate, + * it takes about 100 msec) + * 5. clear RTS (return to NORMAL Operation) + * 6. wait at least 50 us, new setting (baud rate, etc) takes effect here + * after + */ +static void tekram_change_speed( struct irda_device *dev, int baud) +{ + struct irtty_cb *self; + struct tty_struct *tty; + struct termios old_termios; + int arg = 0; + int cflag; + __u8 byte; + int actual; + mm_segment_t fs; + + DEBUG( 4, __FUNCTION__ "()\n"); + + ASSERT( dev != NULL, return;); + ASSERT( dev->magic == IRDA_DEVICE_MAGIC, return;); + + self = (struct irtty_cb *) dev->priv; + + ASSERT( self != NULL, return;); + ASSERT( self->magic == IRTTY_MAGIC, return;); + + if ( !self->tty) + return; + + tty = self->tty; + + old_termios = *(tty->termios); + cflag = tty->termios->c_cflag; + + cflag &= ~CBAUD; + + switch (baud) { + case 9600: + default: + cflag |= B9600; + byte = 4; + break; + case 19200: + cflag |= B19200; + byte = 3; + break; + case 34800: + cflag |= B38400; + byte = 2; + break; + case 57600: + cflag |= B57600; + byte = 1; + break; + case 115200: + cflag |= B115200; + byte = 0; + break; + } + + /* Set DTR, Clear RTS */ + DEBUG( 0, __FUNCTION__ "(), Setting DTR, Clearing RTS\n"); + arg = TIOCM_DTR | TIOCM_OUT2; + + fs = get_fs(); + set_fs( get_ds()); + + if ( tty->driver.ioctl( tty, NULL, TIOCMSET, + (unsigned long) &arg)) { + DEBUG( 0, "error setting Tekram speed!\n"); + } + set_fs(fs); + + /* Wait at least 7us */ + udelay( 7); + + DEBUG( 0, __FUNCTION__ "(), Writing control byte\n"); + /* Write control byte */ + if ( tty->driver.write) + actual = tty->driver.write( self->tty, 0, &byte, 1); + + /* Wait at least 100 ms */ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout( 10); + + /* Set DTR, Set RTS */ + DEBUG( 0, __FUNCTION__ "(), Setting DTR, Setting RTS\n"); + arg = TIOCM_DTR | TIOCM_RTS | TIOCM_OUT2; + + fs = get_fs(); + set_fs( get_ds()); + + if ( tty->driver.ioctl( tty, NULL, TIOCMSET, + (unsigned long) &arg)) { + DEBUG( 0, "error setting Tekram speed!\n"); + } + set_fs(fs); + + DEBUG( 0, __FUNCTION__ "(), Setting new speed on serial port\n"); + /* Now change the speed of the serial port */ + tty->termios->c_cflag = cflag; + tty->driver.set_termios( tty, &old_termios); +} + +/* + * Function tekram_reset (driver) + * + * This function resets the tekram dongle. Warning, this function + * must be called with a process context!! + * + * Algorithm: + * 0. set RTS and DTR, and wait 50 ms + * ( power off the IR-210 ) + * 1. clear RTS + * 2. set DTR, and wait at least 1 ms + * 3. clear DTR to SPACE state, wait at least 50 us for further + * operation + */ +void tekram_reset( struct irda_device *dev, int unused) +{ + struct irtty_cb *self; + struct tty_struct *tty; + int arg = 0; + mm_segment_t fs; + + DEBUG( 4, __FUNCTION__ "()\n"); + + ASSERT( dev != NULL, return;); + ASSERT( dev->magic == IRDA_DEVICE_MAGIC, return;); + + self = (struct irtty_cb *) dev->priv; + + ASSERT( self != NULL, return;); + ASSERT( self->magic == IRTTY_MAGIC, return;); + + tty = self->tty; + if ( !tty) + return; + + DEBUG( 0, __FUNCTION__ "(), Power off dongle\n"); + arg = TIOCM_RTS | TIOCM_DTR | TIOCM_OUT2; + + fs = get_fs(); + set_fs( get_ds()); + + if ( tty->driver.ioctl( tty, NULL, TIOCMSET, + (unsigned long) &arg)) + { + DEBUG(0, "error setting ESI speed!\n"); + } + set_fs(fs); + + /* Sleep 50 ms */ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(5); + + DEBUG( 0, __FUNCTION__ "(), Set DTR, clear RTS\n"); + /* Set DTR, clear RTS */ + arg = TIOCM_DTR | TIOCM_OUT2; + + fs = get_fs(); + set_fs( get_ds()); + + if ( tty->driver.ioctl( tty, NULL, TIOCMSET, + (unsigned long) &arg)) { + DEBUG( 0, "Error setting Tekram speed!\n"); + } + set_fs(fs); + + /* Should sleep 1 ms, but 10-20 should not do any harm */ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(2); + + DEBUG( 0, __FUNCTION__ "(), STATE3\n"); + /* Clear DTR, clear RTS */ + arg = TIOCM_OUT2; + + fs = get_fs(); + set_fs( get_ds()); + + if ( tty->driver.ioctl( tty, NULL, TIOCMSET, (unsigned long) &arg)) { + DEBUG( 0, "error setting Tekram speed!\n"); + } + set_fs(fs); + + /* Finished! */ +} + +/* + * Function tekram_init_qos (qos) + * + * Initialize QoS capabilities + * + */ +static void tekram_init_qos( struct irda_device *idev, struct qos_info *qos) +{ + qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; + qos->min_turn_time.bits &= 0xfe; /* All except 0 ms */ +} + +#ifdef MODULE + +/* + * Function init_module (void) + * + * Initialize Tekram module + * + */ +int init_module(void) +{ + tekram_init(); + return(0); +} + +/* + * Function cleanup_module (void) + * + * Cleanup Tekram module + * + */ +void cleanup_module(void) +{ + tekram_cleanup(); +} + +#endif -- cgit v1.2.3