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

• Lines: 315
• Date: Fri Dec 18 08:06:39 1998
• Orig file: v2.1.131/linux/drivers/net/irda/actisys.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.131/linux/drivers/net/irda/actisys.c linux/drivers/net/irda/actisys.c
@@ -0,0 +1,314 @@
+/*********************************************************************
+ *                
+ * Filename:      actisys.c
+ * Version:       0.3
+ * Description:   Implementation for the ACTiSYS IR-220L and IR-220L+ 
+ *                dongles
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Wed Oct 21 20:02:35 1998
+ * Modified at:   Mon Dec 14 11:50:32 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 actisys_reset( struct irda_device *dev, int unused);
+static void actisys_open( struct irda_device *idev, int type);
+static void actisys_close( struct irda_device *dev);
+static void actisys_change_speed( struct irda_device *dev, int baudrate);
+static void actisys_reset( struct irda_device *dev, int unused);
+static void actisys_init_qos( struct irda_device *idev, struct qos_info *qos);
+
+/* These are the baudrates supported */
+static int baud_rates[] = { 9600, 19200, 57600, 115200, 38400};
+
+static struct dongle dongle = {
+	ACTISYS_DONGLE,
+	actisys_open,
+	actisys_close,
+	actisys_reset,
+	actisys_change_speed,
+	actisys_init_qos,
+};
+
+__initfunc(void actisys_init(void))
+{
+	irtty_register_dongle(&dongle);
+}
+
+void actisys_cleanup(void)
+{
+	irtty_unregister_dongle(&dongle);
+}
+
+static void actisys_open( struct irda_device *idev, int type)
+{
+	strcat( idev->name, " <-> actisys");
+
+        idev->io.dongle_id = type;
+
+	MOD_INC_USE_COUNT;
+}
+
+static void actisys_close( struct irda_device *dev)
+{
+	MOD_DEC_USE_COUNT;
+}
+
+/*
+ * Function actisys_change_speed (tty, baud)
+ *
+ *    Change speed of the ACTiSYS IR-220L and IR-220L+ type IrDA dongles.  
+ *    To cycle through the available baud rates, pulse RTS low for a few ms.
+ *    To be compatible with the new IR-220L+, we have to reset the dongle 
+ *    first since its not possible cycle around anymore and still be 
+ *    compatible with both dongles :-(
+ */
+static void actisys_change_speed( struct irda_device *idev, int baudrate)
+{
+        struct irtty_cb *self;
+        struct tty_struct *tty;
+        int arg = 0;
+        struct termios old_termios;
+	int cflag;
+        int current_baudrate;
+        int index = 0;
+	mm_segment_t fs;
+	
+	DEBUG( 0, __FUNCTION__ "()\n");
+
+	ASSERT( idev != NULL, return;);
+	ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;);
+	
+	self = (struct irtty_cb *) idev->priv;
+	
+	ASSERT( self != NULL, return;);
+	ASSERT( self->magic == IRTTY_MAGIC, return;);
+
+	current_baudrate = idev->qos.baud_rate.value;
+
+	/* Find the correct baudrate index for the currently used baudrate */
+	while ( current_baudrate != baud_rates[index])
+		index++;
+
+        DEBUG( 0, __FUNCTION__ "(), index=%d\n", index);
+
+	if ( !self->tty)
+		return;
+
+	tty = self->tty;
+
+	/* Cycle through avaiable baudrates until we reach the correct one */
+        while ( current_baudrate != baudrate) {	
+                DEBUG( 0, __FUNCTION__ "(), current baudrate = %d\n",
+                       baud_rates[index]);
+		DEBUG( 0, __FUNCTION__ "(), Clearing 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, __FUNCTION__ 
+			       "Error clearing RTS!\n");
+		}
+		set_fs(fs);
+		
+		/* Wait at a few ms */
+		current->state = TASK_INTERRUPTIBLE;
+		schedule_timeout(2);
+
+		/* Set DTR, Set RTS */
+                arg = TIOCM_DTR | TIOCM_RTS;
+
+		fs = get_fs();
+		set_fs( get_ds());
+		
+		if ( tty->driver.ioctl( tty, NULL, TIOCMSET, 
+					(unsigned long) &arg)) { 
+			DEBUG( 0, __FUNCTION__  "Error setting RTS!\n");
+		}
+		set_fs(fs);
+		
+		/* Wait at a few ms again */
+		current->state = TASK_INTERRUPTIBLE;
+		schedule_timeout( 2);
+
+                /* Go to next baudrate */
+		if ( idev->io.dongle_id == ACTISYS_DONGLE)
+                        index = (index+1) % 4; /* IR-220L */
+		else
+                        index = (index+1) % 5; /* IR-220L+ */
+
+                current_baudrate = baud_rates[index];
+        }
+	DEBUG( 0, __FUNCTION__ "(), current baudrate = %d\n", 
+                  baud_rates[index]);
+
+	/* Now change the speed of the serial port */
+	old_termios = *(tty->termios);
+	cflag = tty->termios->c_cflag;
+
+	cflag &= ~CBAUD;
+
+        switch ( baudrate) {
+        case 9600:
+        default:
+		cflag |= B9600;
+		break;
+	case 19200:
+		cflag |= B19200;
+		break;
+	case 38400:
+		cflag |= B38400;
+		break;
+	case 57600:
+		cflag |= B57600;
+		break;
+	case 115200:
+		cflag |= B115200;
+		break;
+	}
+
+	tty->termios->c_cflag = cflag;
+
+	DEBUG( 0, __FUNCTION__ "(), Setting the speed of the serial port\n");
+	tty->driver.set_termios( tty, &old_termios);
+}
+
+/*
+ * Function actisys_reset (dev)
+ *
+ *      Reset the Actisys type dongle. Warning, this function must only be
+ *      called with a process context!
+ *
+ *    	1. Clear DTR for a few ms.
+ *
+ */
+static void actisys_reset( struct irda_device *idev, int unused)
+{
+	struct irtty_cb *self;
+        struct tty_struct *tty;
+        int arg = 0;
+	mm_segment_t fs;
+
+	DEBUG( 4, __FUNCTION__ "()\n");
+
+	ASSERT( idev != NULL, return;);
+	ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;);
+	
+	self = (struct irtty_cb *) idev->priv;
+	
+	ASSERT( self != NULL, return;);
+	ASSERT( self->magic == IRTTY_MAGIC, return;);
+
+	tty = self->tty;
+	if ( !tty)
+		return;
+
+	DEBUG( 0, __FUNCTION__ "(), Clearing DTR\n");
+	arg = TIOCM_RTS;
+
+	fs = get_fs();
+	set_fs( get_ds());
+	
+	if ( tty->driver.ioctl( tty, NULL, TIOCMSET, 
+				(unsigned long) &arg)) 
+	{ 
+		DEBUG( 0, __FUNCTION__"(), Ioctl error!\n");
+	}
+	set_fs(fs);
+
+	/* Sleep 10-20 ms*/
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout(2);
+	
+	DEBUG( 0, __FUNCTION__ "(), Setting DTR\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, __FUNCTION__"(), Ioctl error!\n");
+	}
+	set_fs(fs);
+
+	idev->qos.baud_rate.value = 9600;
+}
+
+/*
+ * Function actisys_init_qos (qos)
+ *
+ *    Initialize QoS capabilities
+ *
+ */
+static void actisys_init_qos( struct irda_device *idev, struct qos_info *qos)
+{
+	qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
+
+	/* Remove support for 38400 if this is not a 220L+ dongle */
+	if ( idev->io.dongle_id == ACTISYS_DONGLE)
+		qos->baud_rate.bits &= ~IR_38400;
+		
+	qos->min_turn_time.bits &= 0xfe; /* All except 0 ms */
+}
+
+#ifdef MODULE
+		
+/*
+ * Function init_module (void)
+ *
+ *    Initialize Actisys module
+ *
+ */
+int init_module(void)
+{
+	actisys_init();
+	return(0);
+}
+
+/*
+ * Function cleanup_module (void)
+ *
+ *    Cleanup Actisys module
+ *
+ */
+void cleanup_module(void)
+{
+	actisys_cleanup();
+}
+
+#endif