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
  39 #define DRIVER_DESC     "Guillemot Digital joystick driver"
  40
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION(DRIVER_DESC);
  43 MODULE_LICENSE("GPL");
  44
  45 #define GUILLEMOT_MAX_START     600     /* 600 us */
  46 #define GUILLEMOT_MAX_STROBE    60      /* 60 us */
  47 #define GUILLEMOT_MAX_LENGTH    17      /* 17 bytes */
  48
  49 static short guillemot_abs_pad[] =
  50         { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
  51
  52 static short guillemot_btn_pad[] =
  53         { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
  54
  55 static struct {
  56         int x;
  57         int y;
  58 } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  59
  60 struct guillemot_type {
  61         unsigned char id;
  62         short *abs;
  63         short *btn;
  64         int hat;
  65         char *name;
  66 };
  67
  68 struct guillemot {
  69         struct gameport *gameport;
  70         struct input_dev dev;
  71         int bads;
  72         int reads;
  73         struct guillemot_type *type;
  74         unsigned char length;
  75         char phys[32];
  76 };
  77
  78 static struct guillemot_type guillemot_type[] = {
  79         { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
  80         { 0 }};
  81
  82 /*
  83  * guillemot_read_packet() reads Guillemot joystick data.
  84  */
  85
  86 static int guillemot_read_packet(struct gameport *gameport, u8 *data)
  87 {
  88         unsigned long flags;
  89         unsigned char u, v;
  90         unsigned int t, s;
  91         int i;
  92
  93         for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
  94                 data[i] = 0;
  95
  96         i = 0;
  97         t = gameport_time(gameport, GUILLEMOT_MAX_START);
  98         s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
  99
 100         local_irq_save(flags);
 101         gameport_trigger(gameport);
 102         v = gameport_read(gameport);
 103
 104         while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
 105                 t--;
 106                 u = v; v = gameport_read(gameport);
 107                 if (v & ~u & 0x10) {
 108                         data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
 109                         i++;
 110                         t = s;
 111                 }
 112         }
 113
 114         local_irq_restore(flags);
 115
 116         return i;
 117 }
 118
 119 /*
 120  * guillemot_poll() reads and analyzes Guillemot joystick data.
 121  */
 122
 123 static void guillemot_poll(struct gameport *gameport)
 124 {
 125         struct guillemot *guillemot = gameport_get_drvdata(gameport);
 126         struct input_dev *dev = &guillemot->dev;
 127         u8 data[GUILLEMOT_MAX_LENGTH];
 128         int i;
 129
 130         guillemot->reads++;
 131
 132         if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
 133                 data[0] != 0x55 || data[16] != 0xaa) {
 134                 guillemot->bads++;
 135         } else {
 136
 137                 for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
 138                         input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
 139
 140                 if (guillemot->type->hat) {
 141                         input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
 142                         input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
 143                 }
 144
 145                 for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
 146                         input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
 147         }
 148
 149         input_sync(dev);
 150 }
 151
 152 /*
 153  * guillemot_open() is a callback from the input open routine.
 154  */
 155
 156 static int guillemot_open(struct input_dev *dev)
 157 {
 158         struct guillemot *guillemot = dev->private;
 159
 160         gameport_start_polling(guillemot->gameport);
 161         return 0;
 162 }
 163
 164 /*
 165  * guillemot_close() is a callback from the input close routine.
 166  */
 167
 168 static void guillemot_close(struct input_dev *dev)
 169 {
 170         struct guillemot *guillemot = dev->private;
 171
 172         gameport_stop_polling(guillemot->gameport);
 173 }
 174
 175 /*
 176  * guillemot_connect() probes for Guillemot joysticks.
 177  */
 178
 179 static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
 180 {
 181         struct guillemot *guillemot;
 182         u8 data[GUILLEMOT_MAX_LENGTH];
 183         int i, t;
 184         int err;
 185
 186         if (!(guillemot = kcalloc(1, sizeof(struct guillemot), GFP_KERNEL)))
 187                 return -ENOMEM;
 188
 189         guillemot->gameport = gameport;
 190
 191         gameport_set_drvdata(gameport, guillemot);
 192
 193         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 194         if (err)
 195                 goto fail1;
 196
 197         i = guillemot_read_packet(gameport, data);
 198
 199         if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
 200                 err = -ENODEV;
 201                 goto fail2;
 202         }
 203
 204         for (i = 0; guillemot_type[i].name; i++)
 205                 if (guillemot_type[i].id == data[11])
 206                         break;
 207
 208         if (!guillemot_type[i].name) {
 209                 printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
 210                         gameport->phys, data[12], data[13], data[11], data[14], data[15]);
 211                 err = -ENODEV;
 212                 goto fail2;
 213         }
 214
 215         gameport_set_poll_handler(gameport, guillemot_poll);
 216         gameport_set_poll_interval(gameport, 20);
 217
 218         sprintf(guillemot->phys, "%s/input0", gameport->phys);
 219
 220         guillemot->type = guillemot_type + i;
 221
 222         guillemot->dev.private = guillemot;
 223         guillemot->dev.open = guillemot_open;
 224         guillemot->dev.close = guillemot_close;
 225
 226         guillemot->dev.name = guillemot_type[i].name;
 227         guillemot->dev.phys = guillemot->phys;
 228         guillemot->dev.id.bustype = BUS_GAMEPORT;
 229         guillemot->dev.id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
 230         guillemot->dev.id.product = guillemot_type[i].id;
 231         guillemot->dev.id.version = (int)data[14] << 8 | data[15];
 232
 233         guillemot->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 234
 235         for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
 236                 input_set_abs_params(&guillemot->dev, t, 0, 255, 0, 0);
 237
 238         if (guillemot->type->hat) {
 239                 input_set_abs_params(&guillemot->dev, ABS_HAT0X, -1, 1, 0, 0);
 240                 input_set_abs_params(&guillemot->dev, ABS_HAT0Y, -1, 1, 0, 0);
 241         }
 242
 243         for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
 244                 set_bit(t, guillemot->dev.keybit);
 245
 246         input_register_device(&guillemot->dev);
 247         printk(KERN_INFO "input: %s ver %d.%02d on %s\n",
 248                 guillemot->type->name, data[14], data[15], gameport->phys);
 249
 250         return 0;
 251
 252 fail2:  gameport_close(gameport);
 253 fail1:  gameport_set_drvdata(gameport, NULL);
 254         kfree(guillemot);
 255         return err;
 256 }
 257
 258 static void guillemot_disconnect(struct gameport *gameport)
 259 {
 260         struct guillemot *guillemot = gameport_get_drvdata(gameport);
 261
 262         printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
 263         input_unregister_device(&guillemot->dev);
 264         gameport_close(gameport);
 265         kfree(guillemot);
 266 }
 267
 268 static struct gameport_driver guillemot_drv = {
 269         .driver         = {
 270                 .name   = "guillemot",
 271         },
 272         .description    = DRIVER_DESC,
 273         .connect        = guillemot_connect,
 274         .disconnect     = guillemot_disconnect,
 275 };
 276
 277 static int __init guillemot_init(void)
 278 {
 279         gameport_register_driver(&guillemot_drv);
 280         return 0;
 281 }
 282
 283 static void __exit guillemot_exit(void)
 284 {
 285         gameport_unregister_driver(&guillemot_drv);
 286 }
 287
 288 module_init(guillemot_init);
 289 module_exit(guillemot_exit);