1 /* 2 * $Id: gf2k.c,v 1.19 2002/01/22 20:27:43 vojtech Exp $ 3 * 4 * Copyright (c) 1998-2001 Vojtech Pavlik 5 */ 6 7 /* 8 * Genius Flight 2000 joystick 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/delay.h> 32 #include <linux/kernel.h> 33 #include <linux/slab.h> 34 #include <linux/module.h> 35 #include <linux/init.h> 36 #include <linux/input.h> 37 #include <linux/gameport.h> 38 #include <linux/jiffies.h> 39 40 #define DRIVER_DESC "Genius Flight 2000 joystick driver" 41 42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 43 MODULE_DESCRIPTION(DRIVER_DESC); 44 MODULE_LICENSE("GPL"); 45 46 #define GF2K_START 400 /* The time we wait for the first bit [400 us] */ 47 #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */ 48 #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */ 49 #define GF2K_LENGTH 80 /* Max number of triplets in a packet */ 50 51 /* 52 * Genius joystick ids ... 53 */ 54 55 #define GF2K_ID_G09 1 56 #define GF2K_ID_F30D 2 57 #define GF2K_ID_F30 3 58 #define GF2K_ID_F31D 4 59 #define GF2K_ID_F305 5 60 #define GF2K_ID_F23P 6 61 #define GF2K_ID_F31 7 62 #define GF2K_ID_MAX 7 63 64 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 }; 65 static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 66 67 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D", 68 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"}; 69 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 }; 70 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 }; 71 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 }; 72 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 }; 73 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 }; 74 75 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE }; 76 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }; 77 static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT }; 78 79 80 static short gf2k_seq_reset[] = { 240, 340, 0 }; 81 static short gf2k_seq_digital[] = { 590, 320, 860, 0 }; 82 83 struct gf2k { 84 struct gameport *gameport; 85 struct input_dev *dev; 86 int reads; 87 int bads; 88 unsigned char id; 89 unsigned char length; 90 char phys[32]; 91 }; 92 93 /* 94 * gf2k_read_packet() reads a Genius Flight2000 packet. 95 */ 96 97 static int gf2k_read_packet(struct gameport *gameport, int length, char *data) 98 { 99 unsigned char u, v; 100 int i; 101 unsigned int t, p; 102 unsigned long flags; 103 104 t = gameport_time(gameport, GF2K_START); 105 p = gameport_time(gameport, GF2K_STROBE); 106 107 i = 0; 108 109 local_irq_save(flags); 110 111 gameport_trigger(gameport); 112 v = gameport_read(gameport); 113 114 while (t > 0 && i < length) { 115 t--; u = v; 116 v = gameport_read(gameport); 117 if (v & ~u & 0x10) { 118 data[i++] = v >> 5; 119 t = p; 120 } 121 } 122 123 local_irq_restore(flags); 124 125 return i; 126 } 127 128 /* 129 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick 130 * into digital mode. 131 */ 132 133 static void gf2k_trigger_seq(struct gameport *gameport, short *seq) 134 { 135 136 unsigned long flags; 137 int i, t; 138 139 local_irq_save(flags); 140 141 i = 0; 142 do { 143 gameport_trigger(gameport); 144 t = gameport_time(gameport, GF2K_TIMEOUT * 1000); 145 while ((gameport_read(gameport) & 1) && t) t--; 146 udelay(seq[i]); 147 } while (seq[++i]); 148 149 gameport_trigger(gameport); 150 151 local_irq_restore(flags); 152 } 153 154 /* 155 * js_sw_get_bits() composes bits from the triplet buffer into a __u64. 156 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 157 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 158 * is number of bits per triplet. 159 */ 160 161 #define GB(p,n,s) gf2k_get_bits(data, p, n, s) 162 163 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift) 164 { 165 __u64 data = 0; 166 int i; 167 168 for (i = 0; i < num / 3 + 2; i++) 169 data |= buf[pos / 3 + i] << (i * 3); 170 data >>= pos % 3; 171 data &= (1 << num) - 1; 172 data <<= shift; 173 174 return data; 175 } 176 177 static void gf2k_read(struct gf2k *gf2k, unsigned char *data) 178 { 179 struct input_dev *dev = gf2k->dev; 180 int i, t; 181 182 for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++) 183 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9)); 184 185 for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++) 186 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9)); 187 188 t = GB(40,4,0); 189 190 for (i = 0; i < gf2k_hats[gf2k->id]; i++) 191 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]); 192 193 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10); 194 195 for (i = 0; i < gf2k_joys[gf2k->id]; i++) 196 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1); 197 198 for (i = 0; i < gf2k_pads[gf2k->id]; i++) 199 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1); 200 201 input_sync(dev); 202 } 203 204 /* 205 * gf2k_poll() reads and analyzes Genius joystick data. 206 */ 207 208 static void gf2k_poll(struct gameport *gameport) 209 { 210 struct gf2k *gf2k = gameport_get_drvdata(gameport); 211 unsigned char data[GF2K_LENGTH]; 212 213 gf2k->reads++; 214 215 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) 216 gf2k->bads++; 217 else 218 gf2k_read(gf2k, data); 219 } 220 221 static int gf2k_open(struct input_dev *dev) 222 { 223 struct gf2k *gf2k = input_get_drvdata(dev); 224 225 gameport_start_polling(gf2k->gameport); 226 return 0; 227 } 228 229 static void gf2k_close(struct input_dev *dev) 230 { 231 struct gf2k *gf2k = input_get_drvdata(dev); 232 233 gameport_stop_polling(gf2k->gameport); 234 } 235 236 /* 237 * gf2k_connect() probes for Genius id joysticks. 238 */ 239 240 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv) 241 { 242 struct gf2k *gf2k; 243 struct input_dev *input_dev; 244 unsigned char data[GF2K_LENGTH]; 245 int i, err; 246 247 gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL); 248 input_dev = input_allocate_device(); 249 if (!gf2k || !input_dev) { 250 err = -ENOMEM; 251 goto fail1; 252 } 253 254 gf2k->gameport = gameport; 255 gf2k->dev = input_dev; 256 257 gameport_set_drvdata(gameport, gf2k); 258 259 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 260 if (err) 261 goto fail1; 262 263 gf2k_trigger_seq(gameport, gf2k_seq_reset); 264 265 msleep(GF2K_TIMEOUT); 266 267 gf2k_trigger_seq(gameport, gf2k_seq_digital); 268 269 msleep(GF2K_TIMEOUT); 270 271 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) { 272 err = -ENODEV; 273 goto fail2; 274 } 275 276 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) { 277 err = -ENODEV; 278 goto fail2; 279 } 280 281 #ifdef RESET_WORKS 282 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) || 283 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) { 284 err = -ENODEV; 285 goto fail2; 286 } 287 #else 288 gf2k->id = 6; 289 #endif 290 291 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) { 292 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n", 293 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]); 294 err = -ENODEV; 295 goto fail2; 296 } 297 298 gameport_set_poll_handler(gameport, gf2k_poll); 299 gameport_set_poll_interval(gameport, 20); 300 301 snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys); 302 303 gf2k->length = gf2k_lens[gf2k->id]; 304 305 input_dev->name = gf2k_names[gf2k->id]; 306 input_dev->phys = gf2k->phys; 307 input_dev->id.bustype = BUS_GAMEPORT; 308 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS; 309 input_dev->id.product = gf2k->id; 310 input_dev->id.version = 0x0100; 311 input_dev->dev.parent = &gameport->dev; 312 313 input_set_drvdata(input_dev, gf2k); 314 315 input_dev->open = gf2k_open; 316 input_dev->close = gf2k_close; 317 318 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 319 320 for (i = 0; i < gf2k_axes[gf2k->id]; i++) 321 set_bit(gf2k_abs[i], input_dev->absbit); 322 323 for (i = 0; i < gf2k_hats[gf2k->id]; i++) { 324 set_bit(ABS_HAT0X + i, input_dev->absbit); 325 input_dev->absmin[ABS_HAT0X + i] = -1; 326 input_dev->absmax[ABS_HAT0X + i] = 1; 327 } 328 329 for (i = 0; i < gf2k_joys[gf2k->id]; i++) 330 set_bit(gf2k_btn_joy[i], input_dev->keybit); 331 332 for (i = 0; i < gf2k_pads[gf2k->id]; i++) 333 set_bit(gf2k_btn_pad[i], input_dev->keybit); 334 335 gf2k_read_packet(gameport, gf2k->length, data); 336 gf2k_read(gf2k, data); 337 338 for (i = 0; i < gf2k_axes[gf2k->id]; i++) { 339 input_dev->absmax[gf2k_abs[i]] = (i < 2) ? input_dev->abs[gf2k_abs[i]] * 2 - 32 : 340 input_dev->abs[gf2k_abs[0]] + input_dev->abs[gf2k_abs[1]] - 32; 341 input_dev->absmin[gf2k_abs[i]] = 32; 342 input_dev->absfuzz[gf2k_abs[i]] = 8; 343 input_dev->absflat[gf2k_abs[i]] = (i < 2) ? 24 : 0; 344 } 345 346 err = input_register_device(gf2k->dev); 347 if (err) 348 goto fail2; 349 350 return 0; 351 352 fail2: gameport_close(gameport); 353 fail1: gameport_set_drvdata(gameport, NULL); 354 input_free_device(input_dev); 355 kfree(gf2k); 356 return err; 357 } 358 359 static void gf2k_disconnect(struct gameport *gameport) 360 { 361 struct gf2k *gf2k = gameport_get_drvdata(gameport); 362 363 input_unregister_device(gf2k->dev); 364 gameport_close(gameport); 365 gameport_set_drvdata(gameport, NULL); 366 kfree(gf2k); 367 } 368 369 static struct gameport_driver gf2k_drv = { 370 .driver = { 371 .name = "gf2k", 372 }, 373 .description = DRIVER_DESC, 374 .connect = gf2k_connect, 375 .disconnect = gf2k_disconnect, 376 }; 377 378 static int __init gf2k_init(void) 379 { 380 gameport_register_driver(&gf2k_drv); 381 return 0; 382 } 383 384 static void __exit gf2k_exit(void) 385 { 386 gameport_unregister_driver(&gf2k_drv); 387 } 388 389 module_init(gf2k_init); 390 module_exit(gf2k_exit); 391