linux/drivers/input/joystick/interact.c
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   1/*
   2 *  Copyright (c) 2001 Vojtech Pavlik
   3 *
   4 *  Based on the work of:
   5 *      Toby Deshane
   6 */
   7
   8/*
   9 * InterAct digital gamepad/joystick driver for Linux
  10 */
  11
  12/*
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation; either version 2 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program; if not, write to the Free Software
  25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26 *
  27 * Should you need to contact me, the author, you can do so either by
  28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  30 */
  31
  32#include <linux/kernel.h>
  33#include <linux/slab.h>
  34#include <linux/module.h>
  35#include <linux/delay.h>
  36#include <linux/init.h>
  37#include <linux/gameport.h>
  38#include <linux/input.h>
  39#include <linux/jiffies.h>
  40
  41#define DRIVER_DESC     "InterAct digital joystick driver"
  42
  43MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  44MODULE_DESCRIPTION(DRIVER_DESC);
  45MODULE_LICENSE("GPL");
  46
  47#define INTERACT_MAX_START      600     /* 400 us */
  48#define INTERACT_MAX_STROBE     60      /* 40 us */
  49#define INTERACT_MAX_LENGTH     32      /* 32 bits */
  50
  51#define INTERACT_TYPE_HHFX      0       /* HammerHead/FX */
  52#define INTERACT_TYPE_PP8D      1       /* ProPad 8 */
  53
  54struct interact {
  55        struct gameport *gameport;
  56        struct input_dev *dev;
  57        int bads;
  58        int reads;
  59        unsigned char type;
  60        unsigned char length;
  61        char phys[32];
  62};
  63
  64static short interact_abs_hhfx[] =
  65        { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 };
  66static short interact_abs_pp8d[] =
  67        { ABS_X, ABS_Y, -1 };
  68
  69static short interact_btn_hhfx[] =
  70        { 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 };
  71static short interact_btn_pp8d[] =
  72        { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 };
  73
  74struct interact_type {
  75        int id;
  76        short *abs;
  77        short *btn;
  78        char *name;
  79        unsigned char length;
  80        unsigned char b8;
  81};
  82
  83static struct interact_type interact_type[] = {
  84        { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX",    32, 4 },
  85        { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 },
  86        { 0 }};
  87
  88/*
  89 * interact_read_packet() reads and InterAct joystick data.
  90 */
  91
  92static int interact_read_packet(struct gameport *gameport, int length, u32 *data)
  93{
  94        unsigned long flags;
  95        unsigned char u, v;
  96        unsigned int t, s;
  97        int i;
  98
  99        i = 0;
 100        data[0] = data[1] = data[2] = 0;
 101        t = gameport_time(gameport, INTERACT_MAX_START);
 102        s = gameport_time(gameport, INTERACT_MAX_STROBE);
 103
 104        local_irq_save(flags);
 105        gameport_trigger(gameport);
 106        v = gameport_read(gameport);
 107
 108        while (t > 0 && i < length) {
 109                t--;
 110                u = v; v = gameport_read(gameport);
 111                if (v & ~u & 0x40) {
 112                        data[0] = (data[0] << 1) | ((v >> 4) & 1);
 113                        data[1] = (data[1] << 1) | ((v >> 5) & 1);
 114                        data[2] = (data[2] << 1) | ((v >> 7) & 1);
 115                        i++;
 116                        t = s;
 117                }
 118        }
 119
 120        local_irq_restore(flags);
 121
 122        return i;
 123}
 124
 125/*
 126 * interact_poll() reads and analyzes InterAct joystick data.
 127 */
 128
 129static void interact_poll(struct gameport *gameport)
 130{
 131        struct interact *interact = gameport_get_drvdata(gameport);
 132        struct input_dev *dev = interact->dev;
 133        u32 data[3];
 134        int i;
 135
 136        interact->reads++;
 137
 138        if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) {
 139                interact->bads++;
 140        } else {
 141
 142                for (i = 0; i < 3; i++)
 143                        data[i] <<= INTERACT_MAX_LENGTH - interact->length;
 144
 145                switch (interact->type) {
 146
 147                        case INTERACT_TYPE_HHFX:
 148
 149                                for (i = 0; i < 4; i++)
 150                                        input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff);
 151
 152                                for (i = 0; i < 2; i++)
 153                                        input_report_abs(dev, ABS_HAT0Y - i,
 154                                                ((data[1] >> ((i << 1) + 17)) & 1)  - ((data[1] >> ((i << 1) + 16)) & 1));
 155
 156                                for (i = 0; i < 8; i++)
 157                                        input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1);
 158
 159                                for (i = 0; i < 4; i++)
 160                                        input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1);
 161
 162                                break;
 163
 164                        case INTERACT_TYPE_PP8D:
 165
 166                                for (i = 0; i < 2; i++)
 167                                        input_report_abs(dev, interact_abs_pp8d[i],
 168                                                ((data[0] >> ((i << 1) + 20)) & 1)  - ((data[0] >> ((i << 1) + 21)) & 1));
 169
 170                                for (i = 0; i < 8; i++)
 171                                        input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1);
 172
 173                                break;
 174                }
 175        }
 176
 177        input_sync(dev);
 178}
 179
 180/*
 181 * interact_open() is a callback from the input open routine.
 182 */
 183
 184static int interact_open(struct input_dev *dev)
 185{
 186        struct interact *interact = input_get_drvdata(dev);
 187
 188        gameport_start_polling(interact->gameport);
 189        return 0;
 190}
 191
 192/*
 193 * interact_close() is a callback from the input close routine.
 194 */
 195
 196static void interact_close(struct input_dev *dev)
 197{
 198        struct interact *interact = input_get_drvdata(dev);
 199
 200        gameport_stop_polling(interact->gameport);
 201}
 202
 203/*
 204 * interact_connect() probes for InterAct joysticks.
 205 */
 206
 207static int interact_connect(struct gameport *gameport, struct gameport_driver *drv)
 208{
 209        struct interact *interact;
 210        struct input_dev *input_dev;
 211        __u32 data[3];
 212        int i, t;
 213        int err;
 214
 215        interact = kzalloc(sizeof(struct interact), GFP_KERNEL);
 216        input_dev = input_allocate_device();
 217        if (!interact || !input_dev) {
 218                err = -ENOMEM;
 219                goto fail1;
 220        }
 221
 222        interact->gameport = gameport;
 223        interact->dev = input_dev;
 224
 225        gameport_set_drvdata(gameport, interact);
 226
 227        err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 228        if (err)
 229                goto fail1;
 230
 231        i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data);
 232
 233        if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) {
 234                err = -ENODEV;
 235                goto fail2;
 236        }
 237
 238        for (i = 0; interact_type[i].length; i++)
 239                if (interact_type[i].id == (data[2] >> 16))
 240                        break;
 241
 242        if (!interact_type[i].length) {
 243                printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n",
 244                        gameport->phys, i, data[0], data[1], data[2]);
 245                err = -ENODEV;
 246                goto fail2;
 247        }
 248
 249        gameport_set_poll_handler(gameport, interact_poll);
 250        gameport_set_poll_interval(gameport, 20);
 251
 252        snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys);
 253
 254        interact->type = i;
 255        interact->length = interact_type[i].length;
 256
 257        input_dev->name = interact_type[i].name;
 258        input_dev->phys = interact->phys;
 259        input_dev->id.bustype = BUS_GAMEPORT;
 260        input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT;
 261        input_dev->id.product = interact_type[i].id;
 262        input_dev->id.version = 0x0100;
 263        input_dev->dev.parent = &gameport->dev;
 264
 265        input_set_drvdata(input_dev, interact);
 266
 267        input_dev->open = interact_open;
 268        input_dev->close = interact_close;
 269
 270        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 271
 272        for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) {
 273                set_bit(t, input_dev->absbit);
 274                if (i < interact_type[interact->type].b8) {
 275                        input_dev->absmin[t] = 0;
 276                        input_dev->absmax[t] = 255;
 277                } else {
 278                        input_dev->absmin[t] = -1;
 279                        input_dev->absmax[t] = 1;
 280                }
 281        }
 282
 283        for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++)
 284                set_bit(t, input_dev->keybit);
 285
 286        err = input_register_device(interact->dev);
 287        if (err)
 288                goto fail2;
 289
 290        return 0;
 291
 292fail2:  gameport_close(gameport);
 293fail1:  gameport_set_drvdata(gameport, NULL);
 294        input_free_device(input_dev);
 295        kfree(interact);
 296        return err;
 297}
 298
 299static void interact_disconnect(struct gameport *gameport)
 300{
 301        struct interact *interact = gameport_get_drvdata(gameport);
 302
 303        input_unregister_device(interact->dev);
 304        gameport_close(gameport);
 305        gameport_set_drvdata(gameport, NULL);
 306        kfree(interact);
 307}
 308
 309static struct gameport_driver interact_drv = {
 310        .driver         = {
 311                .name   = "interact",
 312        },
 313        .description    = DRIVER_DESC,
 314        .connect        = interact_connect,
 315        .disconnect     = interact_disconnect,
 316};
 317
 318static int __init interact_init(void)
 319{
 320        return gameport_register_driver(&interact_drv);
 321}
 322
 323static void __exit interact_exit(void)
 324{
 325        gameport_unregister_driver(&interact_drv);
 326}
 327
 328module_init(interact_init);
 329module_exit(interact_exit);
 330