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-rw-r--r--drivers/net/irda/tekram.c314
1 files changed, 314 insertions, 0 deletions
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 <dagb@cs.uit.no>
+ * Created at: Wed Oct 21 20:02:35 1998
+ * Modified at: Mon Jan 18 11:30:38 1999
+ * 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 | 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
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