drivers/input/joystick/guillemot.c

   1 /*
   2  * $Id: guillemot.c,v 1.10 2002/01/22 20:28:12 vojtech Exp $
   3  *
   4  *  Copyright (c) 2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Guillemot Digital Interface Protocol driver for Linux
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/slab.h>
  33 #include <linux/module.h>
  34 #include <linux/delay.h>
  35 #include <linux/init.h>
  36 #include <linux/gameport.h>
  37 #include <linux/input.h>
  38 #include <linux/jiffies.h>
  39
  40 #define DRIVER_DESC     "Guillemot Digital joystick driver"
  41
  42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  43 MODULE_DESCRIPTION(DRIVER_DESC);
  44 MODULE_LICENSE("GPL");
  45
  46 #define GUILLEMOT_MAX_START     600     /* 600 us */
  47 #define GUILLEMOT_MAX_STROBE    60      /* 60 us */
  48 #define GUILLEMOT_MAX_LENGTH    17      /* 17 bytes */
  49
  50 static short guillemot_abs_pad[] =
  51         { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
  52
  53 static short guillemot_btn_pad[] =
  54         { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
  55
  56 static struct {
  57         int x;
  58         int y;
  59 } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  60
  61 struct guillemot_type {
  62         unsigned char id;
  63         short *abs;
  64         short *btn;
  65         int hat;
  66         char *name;
  67 };
  68
  69 struct guillemot {
  70         struct gameport *gameport;
  71         struct input_dev *dev;
  72         int bads;
  73         int reads;
  74         struct guillemot_type *type;
  75         unsigned char length;
  76         char phys[32];
  77 };
  78
  79 static struct guillemot_type guillemot_type[] = {
  80         { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
  81         { 0 }};
  82
  83 /*
  84  * guillemot_read_packet() reads Guillemot joystick data.
  85  */
  86
  87 static int guillemot_read_packet(struct gameport *gameport, u8 *data)
  88 {
  89         unsigned long flags;
  90         unsigned char u, v;
  91         unsigned int t, s;
  92         int i;
  93
  94         for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
  95                 data[i] = 0;
  96
  97         i = 0;
  98         t = gameport_time(gameport, GUILLEMOT_MAX_START);
  99         s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
 100
 101         local_irq_save(flags);
 102         gameport_trigger(gameport);
 103         v = gameport_read(gameport);
 104
 105         while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
 106                 t--;
 107                 u = v; v = gameport_read(gameport);
 108                 if (v & ~u & 0x10) {
 109                         data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
 110                         i++;
 111                         t = s;
 112                 }
 113         }
 114
 115         local_irq_restore(flags);
 116
 117         return i;
 118 }
 119
 120 /*
 121  * guillemot_poll() reads and analyzes Guillemot joystick data.
 122  */
 123
 124 static void guillemot_poll(struct gameport *gameport)
 125 {
 126         struct guillemot *guillemot = gameport_get_drvdata(gameport);
 127         struct input_dev *dev = guillemot->dev;
 128         u8 data[GUILLEMOT_MAX_LENGTH];
 129         int i;
 130
 131         guillemot->reads++;
 132
 133         if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
 134                 data[0] != 0x55 || data[16] != 0xaa) {
 135                 guillemot->bads++;
 136         } else {
 137
 138                 for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
 139                         input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
 140
 141                 if (guillemot->type->hat) {
 142                         input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
 143                         input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
 144                 }
 145
 146                 for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
 147                         input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
 148         }
 149
 150         input_sync(dev);
 151 }
 152
 153 /*
 154  * guillemot_open() is a callback from the input open routine.
 155  */
 156
 157 static int guillemot_open(struct input_dev *dev)
 158 {
 159         struct guillemot *guillemot = dev->private;
 160
 161         gameport_start_polling(guillemot->gameport);
 162         return 0;
 163 }
 164
 165 /*
 166  * guillemot_close() is a callback from the input close routine.
 167  */
 168
 169 static void guillemot_close(struct input_dev *dev)
 170 {
 171         struct guillemot *guillemot = dev->private;
 172
 173         gameport_stop_polling(guillemot->gameport);
 174 }
 175
 176 /*
 177  * guillemot_connect() probes for Guillemot joysticks.
 178  */
 179
 180 static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
 181 {
 182         struct guillemot *guillemot;
 183         struct input_dev *input_dev;
 184         u8 data[GUILLEMOT_MAX_LENGTH];
 185         int i, t;
 186         int err;
 187
 188         guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
 189         input_dev = input_allocate_device();
 190         if (!guillemot || !input_dev) {
 191                 err = -ENOMEM;
 192                 goto fail1;
 193         }
 194
 195         guillemot->gameport = gameport;
 196         guillemot->dev = input_dev;
 197
 198         gameport_set_drvdata(gameport, guillemot);
 199
 200         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 201         if (err)
 202                 goto fail1;
 203
 204         i = guillemot_read_packet(gameport, data);
 205
 206         if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
 207                 err = -ENODEV;
 208                 goto fail2;
 209         }
 210
 211         for (i = 0; guillemot_type[i].name; i++)
 212                 if (guillemot_type[i].id == data[11])
 213                         break;
 214
 215         if (!guillemot_type[i].name) {
 216                 printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
 217                         gameport->phys, data[12], data[13], data[11], data[14], data[15]);
 218                 err = -ENODEV;
 219                 goto fail2;
 220         }
 221
 222         gameport_set_poll_handler(gameport, guillemot_poll);
 223         gameport_set_poll_interval(gameport, 20);
 224
 225         snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
 226         guillemot->type = guillemot_type + i;
 227
 228         input_dev->name = guillemot_type[i].name;
 229         input_dev->phys = guillemot->phys;
 230         input_dev->id.bustype = BUS_GAMEPORT;
 231         input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
 232         input_dev->id.product = guillemot_type[i].id;
 233         input_dev->id.version = (int)data[14] << 8 | data[15];
 234         input_dev->cdev.dev = &gameport->dev;
 235         input_dev->private = guillemot;
 236
 237         input_dev->open = guillemot_open;
 238         input_dev->close = guillemot_close;
 239
 240         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 241
 242         for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
 243                 input_set_abs_params(input_dev, t, 0, 255, 0, 0);
 244
 245         if (guillemot->type->hat) {
 246                 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
 247                 input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
 248         }
 249
 250         for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
 251                 set_bit(t, input_dev->keybit);
 252
 253         input_register_device(guillemot->dev);
 254
 255         return 0;
 256
 257 fail2:  gameport_close(gameport);
 258 fail1:  gameport_set_drvdata(gameport, NULL);
 259         input_free_device(input_dev);
 260         kfree(guillemot);
 261         return err;
 262 }
 263
 264 static void guillemot_disconnect(struct gameport *gameport)
 265 {
 266         struct guillemot *guillemot = gameport_get_drvdata(gameport);
 267
 268         printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
 269         input_unregister_device(guillemot->dev);
 270         gameport_close(gameport);
 271         kfree(guillemot);
 272 }
 273
 274 static struct gameport_driver guillemot_drv = {
 275         .driver         = {
 276                 .name   = "guillemot",
 277         },
 278         .description    = DRIVER_DESC,
 279         .connect        = guillemot_connect,
 280         .disconnect     = guillemot_disconnect,
 281 };
 282
 283 static int __init guillemot_init(void)
 284 {
 285         gameport_register_driver(&guillemot_drv);
 286         return 0;
 287 }
 288
 289 static void __exit guillemot_exit(void)
 290 {
 291         gameport_unregister_driver(&guillemot_drv);
 292 }
 293
 294 module_init(guillemot_init);
 295 module_exit(guillemot_exit);