1 /* 2 * Copyright (c) 1998-2001 Vojtech Pavlik 3 */ 4 5 /* 6 * Genius Flight 2000 joystick driver for Linux 7 */ 8 9 /* 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 * Should you need to contact me, the author, you can do so either by 25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 27 */ 28 29 #include <linux/delay.h> 30 #include <linux/kernel.h> 31 #include <linux/slab.h> 32 #include <linux/module.h> 33 #include <linux/input.h> 34 #include <linux/gameport.h> 35 #include <linux/jiffies.h> 36 37 #define DRIVER_DESC "Genius Flight 2000 joystick driver" 38 39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 40 MODULE_DESCRIPTION(DRIVER_DESC); 41 MODULE_LICENSE("GPL"); 42 43 #define GF2K_START 400 /* The time we wait for the first bit [400 us] */ 44 #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */ 45 #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */ 46 #define GF2K_LENGTH 80 /* Max number of triplets in a packet */ 47 48 /* 49 * Genius joystick ids ... 50 */ 51 52 #define GF2K_ID_G09 1 53 #define GF2K_ID_F30D 2 54 #define GF2K_ID_F30 3 55 #define GF2K_ID_F31D 4 56 #define GF2K_ID_F305 5 57 #define GF2K_ID_F23P 6 58 #define GF2K_ID_F31 7 59 #define GF2K_ID_MAX 7 60 61 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 }; 62 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}}; 63 64 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D", 65 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"}; 66 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 }; 67 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 }; 68 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 }; 69 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 }; 70 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 }; 71 72 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE }; 73 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }; 74 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 }; 75 76 77 static short gf2k_seq_reset[] = { 240, 340, 0 }; 78 static short gf2k_seq_digital[] = { 590, 320, 860, 0 }; 79 80 struct gf2k { 81 struct gameport *gameport; 82 struct input_dev *dev; 83 int reads; 84 int bads; 85 unsigned char id; 86 unsigned char length; 87 char phys[32]; 88 }; 89 90 /* 91 * gf2k_read_packet() reads a Genius Flight2000 packet. 92 */ 93 94 static int gf2k_read_packet(struct gameport *gameport, int length, char *data) 95 { 96 unsigned char u, v; 97 int i; 98 unsigned int t, p; 99 unsigned long flags; 100 101 t = gameport_time(gameport, GF2K_START); 102 p = gameport_time(gameport, GF2K_STROBE); 103 104 i = 0; 105 106 local_irq_save(flags); 107 108 gameport_trigger(gameport); 109 v = gameport_read(gameport); 110 111 while (t > 0 && i < length) { 112 t--; u = v; 113 v = gameport_read(gameport); 114 if (v & ~u & 0x10) { 115 data[i++] = v >> 5; 116 t = p; 117 } 118 } 119 120 local_irq_restore(flags); 121 122 return i; 123 } 124 125 /* 126 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick 127 * into digital mode. 128 */ 129 130 static void gf2k_trigger_seq(struct gameport *gameport, short *seq) 131 { 132 133 unsigned long flags; 134 int i, t; 135 136 local_irq_save(flags); 137 138 i = 0; 139 do { 140 gameport_trigger(gameport); 141 t = gameport_time(gameport, GF2K_TIMEOUT * 1000); 142 while ((gameport_read(gameport) & 1) && t) t--; 143 udelay(seq[i]); 144 } while (seq[++i]); 145 146 gameport_trigger(gameport); 147 148 local_irq_restore(flags); 149 } 150 151 /* 152 * js_sw_get_bits() composes bits from the triplet buffer into a __u64. 153 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 154 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 155 * is number of bits per triplet. 156 */ 157 158 #define GB(p,n,s) gf2k_get_bits(data, p, n, s) 159 160 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift) 161 { 162 __u64 data = 0; 163 int i; 164 165 for (i = 0; i < num / 3 + 2; i++) 166 data |= buf[pos / 3 + i] << (i * 3); 167 data >>= pos % 3; 168 data &= (1 << num) - 1; 169 data <<= shift; 170 171 return data; 172 } 173 174 static void gf2k_read(struct gf2k *gf2k, unsigned char *data) 175 { 176 struct input_dev *dev = gf2k->dev; 177 int i, t; 178 179 for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++) 180 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9)); 181 182 for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++) 183 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9)); 184 185 t = GB(40,4,0); 186 187 for (i = 0; i < gf2k_hats[gf2k->id]; i++) 188 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]); 189 190 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10); 191 192 for (i = 0; i < gf2k_joys[gf2k->id]; i++) 193 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1); 194 195 for (i = 0; i < gf2k_pads[gf2k->id]; i++) 196 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1); 197 198 input_sync(dev); 199 } 200 201 /* 202 * gf2k_poll() reads and analyzes Genius joystick data. 203 */ 204 205 static void gf2k_poll(struct gameport *gameport) 206 { 207 struct gf2k *gf2k = gameport_get_drvdata(gameport); 208 unsigned char data[GF2K_LENGTH]; 209 210 gf2k->reads++; 211 212 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) 213 gf2k->bads++; 214 else 215 gf2k_read(gf2k, data); 216 } 217 218 static int gf2k_open(struct input_dev *dev) 219 { 220 struct gf2k *gf2k = input_get_drvdata(dev); 221 222 gameport_start_polling(gf2k->gameport); 223 return 0; 224 } 225 226 static void gf2k_close(struct input_dev *dev) 227 { 228 struct gf2k *gf2k = input_get_drvdata(dev); 229 230 gameport_stop_polling(gf2k->gameport); 231 } 232 233 /* 234 * gf2k_connect() probes for Genius id joysticks. 235 */ 236 237 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv) 238 { 239 struct gf2k *gf2k; 240 struct input_dev *input_dev; 241 unsigned char data[GF2K_LENGTH]; 242 int i, err; 243 244 gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL); 245 input_dev = input_allocate_device(); 246 if (!gf2k || !input_dev) { 247 err = -ENOMEM; 248 goto fail1; 249 } 250 251 gf2k->gameport = gameport; 252 gf2k->dev = input_dev; 253 254 gameport_set_drvdata(gameport, gf2k); 255 256 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 257 if (err) 258 goto fail1; 259 260 gf2k_trigger_seq(gameport, gf2k_seq_reset); 261 262 msleep(GF2K_TIMEOUT); 263 264 gf2k_trigger_seq(gameport, gf2k_seq_digital); 265 266 msleep(GF2K_TIMEOUT); 267 268 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) { 269 err = -ENODEV; 270 goto fail2; 271 } 272 273 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) { 274 err = -ENODEV; 275 goto fail2; 276 } 277 278 #ifdef RESET_WORKS 279 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) && 280 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) { 281 err = -ENODEV; 282 goto fail2; 283 } 284 #else 285 gf2k->id = 6; 286 #endif 287 288 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) { 289 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n", 290 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]); 291 err = -ENODEV; 292 goto fail2; 293 } 294 295 gameport_set_poll_handler(gameport, gf2k_poll); 296 gameport_set_poll_interval(gameport, 20); 297 298 snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys); 299 300 gf2k->length = gf2k_lens[gf2k->id]; 301 302 input_dev->name = gf2k_names[gf2k->id]; 303 input_dev->phys = gf2k->phys; 304 input_dev->id.bustype = BUS_GAMEPORT; 305 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS; 306 input_dev->id.product = gf2k->id; 307 input_dev->id.version = 0x0100; 308 input_dev->dev.parent = &gameport->dev; 309 310 input_set_drvdata(input_dev, gf2k); 311 312 input_dev->open = gf2k_open; 313 input_dev->close = gf2k_close; 314 315 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 316 317 for (i = 0; i < gf2k_axes[gf2k->id]; i++) 318 set_bit(gf2k_abs[i], input_dev->absbit); 319 320 for (i = 0; i < gf2k_hats[gf2k->id]; i++) 321 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0); 322 323 for (i = 0; i < gf2k_joys[gf2k->id]; i++) 324 set_bit(gf2k_btn_joy[i], input_dev->keybit); 325 326 for (i = 0; i < gf2k_pads[gf2k->id]; i++) 327 set_bit(gf2k_btn_pad[i], input_dev->keybit); 328 329 gf2k_read_packet(gameport, gf2k->length, data); 330 gf2k_read(gf2k, data); 331 332 for (i = 0; i < gf2k_axes[gf2k->id]; i++) { 333 int max = i < 2 ? 334 input_abs_get_val(input_dev, gf2k_abs[i]) * 2 : 335 input_abs_get_val(input_dev, gf2k_abs[0]) + 336 input_abs_get_val(input_dev, gf2k_abs[1]); 337 int flat = i < 2 ? 24 : 0; 338 339 input_set_abs_params(input_dev, gf2k_abs[i], 340 32, max - 32, 8, flat); 341 } 342 343 err = input_register_device(gf2k->dev); 344 if (err) 345 goto fail2; 346 347 return 0; 348 349 fail2: gameport_close(gameport); 350 fail1: gameport_set_drvdata(gameport, NULL); 351 input_free_device(input_dev); 352 kfree(gf2k); 353 return err; 354 } 355 356 static void gf2k_disconnect(struct gameport *gameport) 357 { 358 struct gf2k *gf2k = gameport_get_drvdata(gameport); 359 360 input_unregister_device(gf2k->dev); 361 gameport_close(gameport); 362 gameport_set_drvdata(gameport, NULL); 363 kfree(gf2k); 364 } 365 366 static struct gameport_driver gf2k_drv = { 367 .driver = { 368 .name = "gf2k", 369 }, 370 .description = DRIVER_DESC, 371 .connect = gf2k_connect, 372 .disconnect = gf2k_disconnect, 373 }; 374 375 module_gameport_driver(gf2k_drv); 376