--- /dev/null
+/*********************************************************************
+ *
+ * Filename: tekram.c
+ * Version: 1.3
+ * 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: Sun Oct 27 22:02:38 2002
+ * Modified by: Martin Diehl <mad@mdiehl.de>
+ *
+ * Copyright (c) 1998-1999 Dag Brattli,
+ * Copyright (c) 2002 Martin Diehl,
+ * 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 Tromsø 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/init.h>
+
+#include <net/irda/irda.h>
+
+#include "sir-dev.h"
+
+static int tekram_delay = 150; /* default is 150 ms */
+module_param(tekram_delay, int, 0);
+MODULE_PARM_DESC(tekram_delay, "tekram dongle write complete delay");
+
+static int tekram_open(struct sir_dev *);
+static int tekram_close(struct sir_dev *);
+static int tekram_change_speed(struct sir_dev *, unsigned);
+static int tekram_reset(struct sir_dev *);
+
+#define TEKRAM_115200 0x00
+#define TEKRAM_57600 0x01
+#define TEKRAM_38400 0x02
+#define TEKRAM_19200 0x03
+#define TEKRAM_9600 0x04
+
+#define TEKRAM_PW 0x10 /* Pulse select bit */
+
+static struct dongle_driver tekram = {
+ .owner = THIS_MODULE,
+ .driver_name = "Tekram IR-210B",
+ .type = IRDA_TEKRAM_DONGLE,
+ .open = tekram_open,
+ .close = tekram_close,
+ .reset = tekram_reset,
+ .set_speed = tekram_change_speed,
+};
+
+static int __init tekram_sir_init(void)
+{
+ if (tekram_delay < 1 || tekram_delay > 500)
+ tekram_delay = 200;
+ pr_debug("%s - using %d ms delay\n",
+ tekram.driver_name, tekram_delay);
+ return irda_register_dongle(&tekram);
+}
+
+static void __exit tekram_sir_cleanup(void)
+{
+ irda_unregister_dongle(&tekram);
+}
+
+static int tekram_open(struct sir_dev *dev)
+{
+ struct qos_info *qos = &dev->qos;
+
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+
+ qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
+ qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
+ irda_qos_bits_to_value(qos);
+
+ /* irda thread waits 50 msec for power settling */
+
+ return 0;
+}
+
+static int tekram_close(struct sir_dev *dev)
+{
+ /* Power off dongle */
+ sirdev_set_dtr_rts(dev, FALSE, FALSE);
+
+ return 0;
+}
+
+/*
+ * Function tekram_change_speed (dev, state, speed)
+ *
+ * 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)
+ *
+ * [oops, why 100 msec? sending 1 byte (10 bits) takes 1.05 msec
+ * - is this probably to compensate for delays in tty layer?]
+ *
+ * 5. clear RTS (return to NORMAL Operation)
+ * 6. wait at least 50 us, new setting (baud rate, etc) takes effect here
+ * after
+ */
+
+#define TEKRAM_STATE_WAIT_SPEED (SIRDEV_STATE_DONGLE_SPEED + 1)
+
+static int tekram_change_speed(struct sir_dev *dev, unsigned speed)
+{
+ unsigned state = dev->fsm.substate;
+ unsigned delay = 0;
+ u8 byte;
+ static int ret = 0;
+
+ switch(state) {
+ case SIRDEV_STATE_DONGLE_SPEED:
+
+ switch (speed) {
+ default:
+ speed = 9600;
+ ret = -EINVAL;
+ /* fall thru */
+ case 9600:
+ byte = TEKRAM_PW|TEKRAM_9600;
+ break;
+ case 19200:
+ byte = TEKRAM_PW|TEKRAM_19200;
+ break;
+ case 38400:
+ byte = TEKRAM_PW|TEKRAM_38400;
+ break;
+ case 57600:
+ byte = TEKRAM_PW|TEKRAM_57600;
+ break;
+ case 115200:
+ byte = TEKRAM_115200;
+ break;
+ }
+
+ /* Set DTR, Clear RTS */
+ sirdev_set_dtr_rts(dev, TRUE, FALSE);
+
+ /* Wait at least 7us */
+ udelay(14);
+
+ /* Write control byte */
+ sirdev_raw_write(dev, &byte, 1);
+
+ dev->speed = speed;
+
+ state = TEKRAM_STATE_WAIT_SPEED;
+ delay = tekram_delay;
+ break;
+
+ case TEKRAM_STATE_WAIT_SPEED:
+ /* Set DTR, Set RTS */
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+ udelay(50);
+ break;
+
+ default:
+ net_err_ratelimited("%s - undefined state %d\n",
+ __func__, state);
+ ret = -EINVAL;
+ break;
+ }
+
+ dev->fsm.substate = state;
+ return (delay > 0) ? delay : ret;
+}
+
+/*
+ * Function tekram_reset (driver)
+ *
+ * This function resets the tekram dongle. Warning, this function
+ * must be called with a process context!!
+ *
+ * Algorithm:
+ * 0. Clear 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
+ */
+
+static int tekram_reset(struct sir_dev *dev)
+{
+ /* Clear DTR, Set RTS */
+ sirdev_set_dtr_rts(dev, FALSE, TRUE);
+
+ /* Should sleep 1 ms */
+ msleep(1);
+
+ /* Set DTR, Set RTS */
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+
+ /* Wait at least 50 us */
+ udelay(75);
+
+ dev->speed = 9600;
+
+ return 0;
+}
+
+MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
+MODULE_DESCRIPTION("Tekram IrMate IR-210B dongle driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("irda-dongle-0"); /* IRDA_TEKRAM_DONGLE */
+
+module_init(tekram_sir_init);
+module_exit(tekram_sir_cleanup);
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