patch-2.1.132 linux/drivers/net/irda/tekram.c

• Lines: 313
• Date: Fri Dec 18 08:06:39 1998
• Orig file: v2.1.131/linux/drivers/net/irda/tekram.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.131/linux/drivers/net/irda/tekram.c linux/drivers/net/irda/tekram.c
@@ -0,0 +1,312 @@
+/*********************************************************************
+ *                
+ * Filename:      tekram.c
+ * Version:       0.3
+ * Description:   Implementation of the Tekram IrMate IR-210B dongle
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Wed Oct 21 20:02:35 1998
+ * Modified at:   Mon Dec 14 11:48:37 1998
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     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 <linux/module.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <asm/ioctls.h>
+#include <asm/segment.h>
+#include <asm/uaccess.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irmod.h>
+#include <net/irda/irda_device.h>
+#include <net/irda/irtty.h>
+#include <net/irda/dongle.h>
+
+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;
+	
+	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;
+	
+	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;
+	
+	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;
+	
+	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 */
+	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