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