drivers/input/joystick/warrior.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 1999-2001 Vojtech Pavlik
   4  */
   5
   6 /*
   7  * Logitech WingMan Warrior joystick driver for Linux
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/input.h>
  14 #include <linux/serio.h>
  15
  16 #define DRIVER_DESC     "Logitech WingMan Warrior joystick driver"
  17
  18 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  19 MODULE_DESCRIPTION(DRIVER_DESC);
  20 MODULE_LICENSE("GPL");
  21
  22 /*
  23  * Constants.
  24  */
  25
  26 #define WARRIOR_MAX_LENGTH      16
  27 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 };
  28
  29 /*
  30  * Per-Warrior data.
  31  */
  32
  33 struct warrior {
  34         struct input_dev *dev;
  35         int idx, len;
  36         unsigned char data[WARRIOR_MAX_LENGTH];
  37         char phys[32];
  38 };
  39
  40 /*
  41  * warrior_process_packet() decodes packets the driver receives from the
  42  * Warrior. It updates the data accordingly.
  43  */
  44
  45 static void warrior_process_packet(struct warrior *warrior)
  46 {
  47         struct input_dev *dev = warrior->dev;
  48         unsigned char *data = warrior->data;
  49
  50         if (!warrior->idx) return;
  51
  52         switch ((data[0] >> 4) & 7) {
  53                 case 1:                                 /* Button data */
  54                         input_report_key(dev, BTN_TRIGGER,  data[3]       & 1);
  55                         input_report_key(dev, BTN_THUMB,   (data[3] >> 1) & 1);
  56                         input_report_key(dev, BTN_TOP,     (data[3] >> 2) & 1);
  57                         input_report_key(dev, BTN_TOP2,    (data[3] >> 3) & 1);
  58                         break;
  59                 case 3:                                 /* XY-axis info->data */
  60                         input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5)));
  61                         input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  62                         break;
  63                 case 5:                                 /* Throttle, spinner, hat info->data */
  64                         input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7));
  65                         input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0));
  66                         input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0));
  67                         input_report_rel(dev, REL_DIAL,  (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5));
  68                         break;
  69         }
  70         input_sync(dev);
  71 }
  72
  73 /*
  74  * warrior_interrupt() is called by the low level driver when characters
  75  * are ready for us. We then buffer them for further processing, or call the
  76  * packet processing routine.
  77  */
  78
  79 static irqreturn_t warrior_interrupt(struct serio *serio,
  80                 unsigned char data, unsigned int flags)
  81 {
  82         struct warrior *warrior = serio_get_drvdata(serio);
  83
  84         if (data & 0x80) {
  85                 if (warrior->idx) warrior_process_packet(warrior);
  86                 warrior->idx = 0;
  87                 warrior->len = warrior_lengths[(data >> 4) & 7];
  88         }
  89
  90         if (warrior->idx < warrior->len)
  91                 warrior->data[warrior->idx++] = data;
  92
  93         if (warrior->idx == warrior->len) {
  94                 if (warrior->idx) warrior_process_packet(warrior);
  95                 warrior->idx = 0;
  96                 warrior->len = 0;
  97         }
  98         return IRQ_HANDLED;
  99 }
 100
 101 /*
 102  * warrior_disconnect() is the opposite of warrior_connect()
 103  */
 104
 105 static void warrior_disconnect(struct serio *serio)
 106 {
 107         struct warrior *warrior = serio_get_drvdata(serio);
 108
 109         serio_close(serio);
 110         serio_set_drvdata(serio, NULL);
 111         input_unregister_device(warrior->dev);
 112         kfree(warrior);
 113 }
 114
 115 /*
 116  * warrior_connect() is the routine that is called when someone adds a
 117  * new serio device. It looks for the Warrior, and if found, registers
 118  * it as an input device.
 119  */
 120
 121 static int warrior_connect(struct serio *serio, struct serio_driver *drv)
 122 {
 123         struct warrior *warrior;
 124         struct input_dev *input_dev;
 125         int err = -ENOMEM;
 126
 127         warrior = kzalloc(sizeof(*warrior), GFP_KERNEL);
 128         input_dev = input_allocate_device();
 129         if (!warrior || !input_dev)
 130                 goto fail1;
 131
 132         warrior->dev = input_dev;
 133         snprintf(warrior->phys, sizeof(warrior->phys), "%s/input0", serio->phys);
 134
 135         input_dev->name = "Logitech WingMan Warrior";
 136         input_dev->phys = warrior->phys;
 137         input_dev->id.bustype = BUS_RS232;
 138         input_dev->id.vendor = SERIO_WARRIOR;
 139         input_dev->id.product = 0x0001;
 140         input_dev->id.version = 0x0100;
 141         input_dev->dev.parent = &serio->dev;
 142
 143         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) |
 144                 BIT_MASK(EV_ABS);
 145         input_dev->keybit[BIT_WORD(BTN_TRIGGER)] = BIT_MASK(BTN_TRIGGER) |
 146                 BIT_MASK(BTN_THUMB) | BIT_MASK(BTN_TOP) | BIT_MASK(BTN_TOP2);
 147         input_dev->relbit[0] = BIT_MASK(REL_DIAL);
 148         input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8);
 149         input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8);
 150         input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0);
 151         input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
 152         input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
 153
 154         serio_set_drvdata(serio, warrior);
 155
 156         err = serio_open(serio, drv);
 157         if (err)
 158                 goto fail2;
 159
 160         err = input_register_device(warrior->dev);
 161         if (err)
 162                 goto fail3;
 163
 164         return 0;
 165
 166  fail3: serio_close(serio);
 167  fail2: serio_set_drvdata(serio, NULL);
 168  fail1: input_free_device(input_dev);
 169         kfree(warrior);
 170         return err;
 171 }
 172
 173 /*
 174  * The serio driver structure.
 175  */
 176
 177 static const struct serio_device_id warrior_serio_ids[] = {
 178         {
 179                 .type   = SERIO_RS232,
 180                 .proto  = SERIO_WARRIOR,
 181                 .id     = SERIO_ANY,
 182                 .extra  = SERIO_ANY,
 183         },
 184         { 0 }
 185 };
 186
 187 MODULE_DEVICE_TABLE(serio, warrior_serio_ids);
 188
 189 static struct serio_driver warrior_drv = {
 190         .driver         = {
 191                 .name   = "warrior",
 192         },
 193         .description    = DRIVER_DESC,
 194         .id_table       = warrior_serio_ids,
 195         .interrupt      = warrior_interrupt,
 196         .connect        = warrior_connect,
 197         .disconnect     = warrior_disconnect,
 198 };
 199
 200 module_serio_driver(warrior_drv);