drivers/net/irda/esi.c

   1 /*********************************************************************
   2  *
   3  * Filename:      esi.c
   4  * Version:       1.4
   5  * Description:   Driver for the Extended Systems JetEye PC dongle
   6  * Status:        Experimental.
   7  * Author:        Thomas Davis, <ratbert@radiks.net>
   8  * Created at:    Sat Feb 21 18:54:38 1998
   9  * Modified at:   Sun May 16 14:35:21 1999
  10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
  11  * Sources:       esi.c
  12  *
  13  *     Copyright (c) 1998-1999, Dag Brattli, <dagb@cs.uit.no>
  14  *     Copyright (c) 1998, Thomas Davis, <ratbert@radiks.net>,
  15  *     All Rights Reserved.
  16  *
  17  *     This program is free software; you can redistribute it and/or
  18  *     modify it under the terms of the GNU General Public License as
  19  *     published by the Free Software Foundation; either version 2 of
  20  *     the License, or (at your option) any later version.
  21  *
  22  *     I, Thomas Davis, provide no warranty for any of this software.
  23  *     This material is provided "AS-IS" and at no charge.
  24  *
  25  ********************************************************************/
  26
  27 #include <linux/module.h>
  28
  29 #include <linux/delay.h>
  30 #include <linux/tty.h>
  31 #include <linux/sched.h>
  32 #include <linux/init.h>
  33
  34 #include <net/irda/irda.h>
  35 #include <net/irda/irmod.h>
  36 #include <net/irda/irda_device.h>
  37 #include <net/irda/irtty.h>
  38 #include <net/irda/dongle.h>
  39
  40 static void esi_open(struct irda_device *idev, int type);
  41 static void esi_close(struct irda_device *driver);
  42 static void esi_change_speed(struct irda_device *idev, int baud);
  43 static void esi_reset(struct irda_device *idev);
  44 static void esi_qos_init(struct irda_device *idev, struct qos_info *qos);
  45
  46 static struct dongle dongle = {
  47         ESI_DONGLE,
  48         esi_open,
  49         esi_close,
  50         esi_reset,
  51         esi_change_speed,
  52         esi_qos_init,
  53 };
  54
  55 int __init esi_init(void)
  56 {
  57         return irda_device_register_dongle(&dongle);
  58 }
  59
  60 void esi_cleanup(void)
  61 {
  62         irda_device_unregister_dongle(&dongle);
  63 }
  64
  65 static void esi_open(struct irda_device *idev, int type)
  66 {
  67         strcat(idev->description, " <-> esi");
  68
  69         idev->io.dongle_id = type;
  70         idev->flags |= IFF_DONGLE;
  71
  72         MOD_INC_USE_COUNT;
  73 }
  74
  75 static void esi_close(struct irda_device *idev)
  76 {
  77         /* Power off dongle */
  78         irda_device_set_dtr_rts(idev, FALSE, FALSE);
  79
  80         MOD_DEC_USE_COUNT;
  81 }
  82
  83 /*
  84  * Function esi_change_speed (tty, baud)
  85  *
  86  *    Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle
  87  *
  88  */
  89 static void esi_change_speed(struct irda_device *idev, int baud)
  90 {
  91         int dtr, rts;
  92
  93         ASSERT(idev != NULL, return;);
  94         ASSERT(idev->magic == IRDA_DEVICE_MAGIC, return;);
  95
  96         switch (baud) {
  97         case 19200:
  98                 dtr = TRUE;
  99                 rts = FALSE;
 100                 break;
 101         case 115200:
 102                 dtr = rts = TRUE;
 103                 break;
 104         case 9600:
 105         default:
 106                 dtr = FALSE;
 107                 rts = TRUE;
 108                 break;
 109         }
 110
 111         /* Change speed of dongle */
 112         irda_device_set_dtr_rts(idev, dtr, rts);
 113 }
 114
 115 static void esi_reset( struct irda_device *idev)
 116 {
 117         /* Empty */
 118 }
 119
 120 /*
 121  * Function esi_qos_init (qos)
 122  *
 123  *    Init QoS capabilities for the dongle
 124  *
 125  */
 126 static void esi_qos_init(struct irda_device *idev, struct qos_info *qos)
 127 {
 128         qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200;
 129         qos->min_turn_time.bits &= 0x01; /* Needs at least 10 ms */
 130 }
 131
 132 #ifdef MODULE
 133
 134 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
 135 MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver");
 136
 137 /*
 138  * Function init_module (void)
 139  *
 140  *    Initialize ESI module
 141  *
 142  */
 143 int init_module(void)
 144 {
 145         return esi_init();
 146 }
 147
 148 /*
 149  * Function cleanup_module (void)
 150  *
 151  *    Cleanup ESI module
 152  *
 153  */
 154 void cleanup_module(void)
 155 {
 156         esi_cleanup();
 157 }
 158
 159 #endif
 160