drivers/input/joystick/interact.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2001 Vojtech Pavlik
   4  *
   5  *  Based on the work of:
   6  *      Toby Deshane
   7  */
   8
   9 /*
  10  * InterAct digital gamepad/joystick driver for Linux
  11  */
  12
  13 /*
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/module.h>
  19 #include <linux/delay.h>
  20 #include <linux/gameport.h>
  21 #include <linux/input.h>
  22 #include <linux/jiffies.h>
  23
  24 #define DRIVER_DESC     "InterAct digital joystick driver"
  25
  26 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  27 MODULE_DESCRIPTION(DRIVER_DESC);
  28 MODULE_LICENSE("GPL");
  29
  30 #define INTERACT_MAX_START      600     /* 400 us */
  31 #define INTERACT_MAX_STROBE     60      /* 40 us */
  32 #define INTERACT_MAX_LENGTH     32      /* 32 bits */
  33
  34 #define INTERACT_TYPE_HHFX      0       /* HammerHead/FX */
  35 #define INTERACT_TYPE_PP8D      1       /* ProPad 8 */
  36
  37 struct interact {
  38         struct gameport *gameport;
  39         struct input_dev *dev;
  40         int bads;
  41         int reads;
  42         unsigned char type;
  43         unsigned char length;
  44         char phys[32];
  45 };
  46
  47 static short interact_abs_hhfx[] =
  48         { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
  49 static short interact_abs_pp8d[] =
  50         { ABS_X, ABS_Y, -1 };
  51
  52 static short interact_btn_hhfx[] =
  53         { BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL, BTN_TL2, BTN_TR2, BTN_MODE, BTN_SELECT, -1 };
  54 static short interact_btn_pp8d[] =
  55         { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
  56
  57 struct interact_type {
  58         int id;
  59         short *abs;
  60         short *btn;
  61         char *name;
  62         unsigned char length;
  63         unsigned char b8;
  64 };
  65
  66 static struct interact_type interact_type[] = {
  67         { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
  68         { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
  69         { 0 }};
  70
  71 /*
  72  * interact_read_packet() reads and InterAct joystick data.
  73  */
  74
  75 static int interact_read_packet(struct gameport *gameport, int length, u32 *data)
  76 {
  77         unsigned long flags;
  78         unsigned char u, v;
  79         unsigned int t, s;
  80         int i;
  81
  82         i = 0;
  83         data[0] = data[1] = data[2] = 0;
  84         t = gameport_time(gameport, INTERACT_MAX_START);
  85         s = gameport_time(gameport, INTERACT_MAX_STROBE);
  86
  87         local_irq_save(flags);
  88         gameport_trigger(gameport);
  89         v = gameport_read(gameport);
  90
  91         while (t > 0 && i < length) {
  92                 t--;
  93                 u = v; v = gameport_read(gameport);
  94                 if (v & ~u & 0x40) {
  95                         data[0] = (data[0] << 1) | ((v >> 4) & 1);
  96                         data[1] = (data[1] << 1) | ((v >> 5) & 1);
  97                         data[2] = (data[2] << 1) | ((v >> 7) & 1);
  98                         i++;
  99                         t = s;
 100                 }
 101         }
 102
 103         local_irq_restore(flags);
 104
 105         return i;
 106 }
 107
 108 /*
 109  * interact_poll() reads and analyzes InterAct joystick data.
 110  */
 111
 112 static void interact_poll(struct gameport *gameport)
 113 {
 114         struct interact *interact = gameport_get_drvdata(gameport);
 115         struct input_dev *dev = interact->dev;
 116         u32 data[3];
 117         int i;
 118
 119         interact->reads++;
 120
 121         if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) {
 122                 interact->bads++;
 123         } else {
 124
 125                 for (i = 0; i < 3; i++)
 126                         data[i] <<= INTERACT_MAX_LENGTH - interact->length;
 127
 128                 switch (interact->type) {
 129
 130                         case INTERACT_TYPE_HHFX:
 131
 132                                 for (i = 0; i < 4; i++)
 133                                         input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
 134
 135                                 for (i = 0; i < 2; i++)
 136                                         input_report_abs(dev, ABS_HAT0Y - i,
 137                                                 ((data[1] >> ((i << 1) + 17)) & 1)  - ((data[1] >> ((i << 1) + 16)) & 1));
 138
 139                                 for (i = 0; i < 8; i++)
 140                                         input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
 141
 142                                 for (i = 0; i < 4; i++)
 143                                         input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1);
 144
 145                                 break;
 146
 147                         case INTERACT_TYPE_PP8D:
 148
 149                                 for (i = 0; i < 2; i++)
 150                                         input_report_abs(dev, interact_abs_pp8d[i],
 151                                                 ((data[0] >> ((i << 1) + 20)) & 1)  - ((data[0] >> ((i << 1) + 21)) & 1));
 152
 153                                 for (i = 0; i < 8; i++)
 154                                         input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1);
 155
 156                                 break;
 157                 }
 158         }
 159
 160         input_sync(dev);
 161 }
 162
 163 /*
 164  * interact_open() is a callback from the input open routine.
 165  */
 166
 167 static int interact_open(struct input_dev *dev)
 168 {
 169         struct interact *interact = input_get_drvdata(dev);
 170
 171         gameport_start_polling(interact->gameport);
 172         return 0;
 173 }
 174
 175 /*
 176  * interact_close() is a callback from the input close routine.
 177  */
 178
 179 static void interact_close(struct input_dev *dev)
 180 {
 181         struct interact *interact = input_get_drvdata(dev);
 182
 183         gameport_stop_polling(interact->gameport);
 184 }
 185
 186 /*
 187  * interact_connect() probes for InterAct joysticks.
 188  */
 189
 190 static int interact_connect(struct gameport *gameport, struct gameport_driver *drv)
 191 {
 192         struct interact *interact;
 193         struct input_dev *input_dev;
 194         __u32 data[3];
 195         int i, t;
 196         int err;
 197
 198         interact = kzalloc(sizeof(struct interact), GFP_KERNEL);
 199         input_dev = input_allocate_device();
 200         if (!interact || !input_dev) {
 201                 err = -ENOMEM;
 202                 goto fail1;
 203         }
 204
 205         interact->gameport = gameport;
 206         interact->dev = input_dev;
 207
 208         gameport_set_drvdata(gameport, interact);
 209
 210         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 211         if (err)
 212                 goto fail1;
 213
 214         i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
 215
 216         if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
 217                 err = -ENODEV;
 218                 goto fail2;
 219         }
 220
 221         for (i = 0; interact_type[i].length; i++)
 222                 if (interact_type[i].id == (data[2] >> 16))
 223                         break;
 224
 225         if (!interact_type[i].length) {
 226                 printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n",
 227                         gameport->phys, i, data[0], data[1], data[2]);
 228                 err = -ENODEV;
 229                 goto fail2;
 230         }
 231
 232         gameport_set_poll_handler(gameport, interact_poll);
 233         gameport_set_poll_interval(gameport, 20);
 234
 235         snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys);
 236
 237         interact->type = i;
 238         interact->length = interact_type[i].length;
 239
 240         input_dev->name = interact_type[i].name;
 241         input_dev->phys = interact->phys;
 242         input_dev->id.bustype = BUS_GAMEPORT;
 243         input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT;
 244         input_dev->id.product = interact_type[i].id;
 245         input_dev->id.version = 0x0100;
 246         input_dev->dev.parent = &gameport->dev;
 247
 248         input_set_drvdata(input_dev, interact);
 249
 250         input_dev->open = interact_open;
 251         input_dev->close = interact_close;
 252
 253         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 254
 255         for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
 256                 if (i < interact_type[interact->type].b8)
 257                         input_set_abs_params(input_dev, t, 0, 255, 0, 0);
 258                 else
 259                         input_set_abs_params(input_dev, t, -1, 1, 0, 0);
 260         }
 261
 262         for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
 263                 __set_bit(t, input_dev->keybit);
 264
 265         err = input_register_device(interact->dev);
 266         if (err)
 267                 goto fail2;
 268
 269         return 0;
 270
 271 fail2:  gameport_close(gameport);
 272 fail1:  gameport_set_drvdata(gameport, NULL);
 273         input_free_device(input_dev);
 274         kfree(interact);
 275         return err;
 276 }
 277
 278 static void interact_disconnect(struct gameport *gameport)
 279 {
 280         struct interact *interact = gameport_get_drvdata(gameport);
 281
 282         input_unregister_device(interact->dev);
 283         gameport_close(gameport);
 284         gameport_set_drvdata(gameport, NULL);
 285         kfree(interact);
 286 }
 287
 288 static struct gameport_driver interact_drv = {
 289         .driver         = {
 290                 .name   = "interact",
 291         },
 292         .description    = DRIVER_DESC,
 293         .connect        = interact_connect,
 294         .disconnect     = interact_disconnect,
 295 };
 296
 297 module_gameport_driver(interact_drv);