1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 1998-2001 Vojtech Pavlik 4 */ 5 6 /* 7 * Genius Flight 2000 joystick driver for Linux 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/kernel.h> 12 #include <linux/slab.h> 13 #include <linux/module.h> 14 #include <linux/input.h> 15 #include <linux/gameport.h> 16 #include <linux/jiffies.h> 17 18 #define DRIVER_DESC "Genius Flight 2000 joystick driver" 19 20 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 21 MODULE_DESCRIPTION(DRIVER_DESC); 22 MODULE_LICENSE("GPL"); 23 24 #define GF2K_START 400 /* The time we wait for the first bit [400 us] */ 25 #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */ 26 #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */ 27 #define GF2K_LENGTH 80 /* Max number of triplets in a packet */ 28 29 /* 30 * Genius joystick ids ... 31 */ 32 33 #define GF2K_ID_G09 1 34 #define GF2K_ID_F30D 2 35 #define GF2K_ID_F30 3 36 #define GF2K_ID_F31D 4 37 #define GF2K_ID_F305 5 38 #define GF2K_ID_F23P 6 39 #define GF2K_ID_F31 7 40 #define GF2K_ID_MAX 7 41 42 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 }; 43 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}}; 44 45 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D", 46 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"}; 47 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 }; 48 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 }; 49 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 }; 50 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 }; 51 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 }; 52 53 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE }; 54 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }; 55 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 }; 56 57 58 static short gf2k_seq_reset[] = { 240, 340, 0 }; 59 static short gf2k_seq_digital[] = { 590, 320, 860, 0 }; 60 61 struct gf2k { 62 struct gameport *gameport; 63 struct input_dev *dev; 64 int reads; 65 int bads; 66 unsigned char id; 67 unsigned char length; 68 char phys[32]; 69 }; 70 71 /* 72 * gf2k_read_packet() reads a Genius Flight2000 packet. 73 */ 74 75 static int gf2k_read_packet(struct gameport *gameport, int length, char *data) 76 { 77 unsigned char u, v; 78 int i; 79 unsigned int t, p; 80 unsigned long flags; 81 82 t = gameport_time(gameport, GF2K_START); 83 p = gameport_time(gameport, GF2K_STROBE); 84 85 i = 0; 86 87 local_irq_save(flags); 88 89 gameport_trigger(gameport); 90 v = gameport_read(gameport); 91 92 while (t > 0 && i < length) { 93 t--; u = v; 94 v = gameport_read(gameport); 95 if (v & ~u & 0x10) { 96 data[i++] = v >> 5; 97 t = p; 98 } 99 } 100 101 local_irq_restore(flags); 102 103 return i; 104 } 105 106 /* 107 * gf2k_trigger_seq() initializes a Genius Flight2000 joystick 108 * into digital mode. 109 */ 110 111 static void gf2k_trigger_seq(struct gameport *gameport, short *seq) 112 { 113 114 unsigned long flags; 115 int i, t; 116 117 local_irq_save(flags); 118 119 i = 0; 120 do { 121 gameport_trigger(gameport); 122 t = gameport_time(gameport, GF2K_TIMEOUT * 1000); 123 while ((gameport_read(gameport) & 1) && t) t--; 124 udelay(seq[i]); 125 } while (seq[++i]); 126 127 gameport_trigger(gameport); 128 129 local_irq_restore(flags); 130 } 131 132 /* 133 * js_sw_get_bits() composes bits from the triplet buffer into a __u64. 134 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 135 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 136 * is number of bits per triplet. 137 */ 138 139 #define GB(p,n,s) gf2k_get_bits(data, p, n, s) 140 141 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift) 142 { 143 __u64 data = 0; 144 int i; 145 146 for (i = 0; i < num / 3 + 2; i++) 147 data |= buf[pos / 3 + i] << (i * 3); 148 data >>= pos % 3; 149 data &= (1 << num) - 1; 150 data <<= shift; 151 152 return data; 153 } 154 155 static void gf2k_read(struct gf2k *gf2k, unsigned char *data) 156 { 157 struct input_dev *dev = gf2k->dev; 158 int i, t; 159 160 for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++) 161 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9)); 162 163 for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++) 164 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9)); 165 166 t = GB(40,4,0); 167 168 for (i = 0; i < gf2k_hats[gf2k->id]; i++) 169 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]); 170 171 t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10); 172 173 for (i = 0; i < gf2k_joys[gf2k->id]; i++) 174 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1); 175 176 for (i = 0; i < gf2k_pads[gf2k->id]; i++) 177 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1); 178 179 input_sync(dev); 180 } 181 182 /* 183 * gf2k_poll() reads and analyzes Genius joystick data. 184 */ 185 186 static void gf2k_poll(struct gameport *gameport) 187 { 188 struct gf2k *gf2k = gameport_get_drvdata(gameport); 189 unsigned char data[GF2K_LENGTH]; 190 191 gf2k->reads++; 192 193 if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id]) 194 gf2k->bads++; 195 else 196 gf2k_read(gf2k, data); 197 } 198 199 static int gf2k_open(struct input_dev *dev) 200 { 201 struct gf2k *gf2k = input_get_drvdata(dev); 202 203 gameport_start_polling(gf2k->gameport); 204 return 0; 205 } 206 207 static void gf2k_close(struct input_dev *dev) 208 { 209 struct gf2k *gf2k = input_get_drvdata(dev); 210 211 gameport_stop_polling(gf2k->gameport); 212 } 213 214 /* 215 * gf2k_connect() probes for Genius id joysticks. 216 */ 217 218 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv) 219 { 220 struct gf2k *gf2k; 221 struct input_dev *input_dev; 222 unsigned char data[GF2K_LENGTH]; 223 int i, err; 224 225 gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL); 226 input_dev = input_allocate_device(); 227 if (!gf2k || !input_dev) { 228 err = -ENOMEM; 229 goto fail1; 230 } 231 232 gf2k->gameport = gameport; 233 gf2k->dev = input_dev; 234 235 gameport_set_drvdata(gameport, gf2k); 236 237 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 238 if (err) 239 goto fail1; 240 241 gf2k_trigger_seq(gameport, gf2k_seq_reset); 242 243 msleep(GF2K_TIMEOUT); 244 245 gf2k_trigger_seq(gameport, gf2k_seq_digital); 246 247 msleep(GF2K_TIMEOUT); 248 249 if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) { 250 err = -ENODEV; 251 goto fail2; 252 } 253 254 if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) { 255 err = -ENODEV; 256 goto fail2; 257 } 258 259 #ifdef RESET_WORKS 260 if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) && 261 (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) { 262 err = -ENODEV; 263 goto fail2; 264 } 265 #else 266 gf2k->id = 6; 267 #endif 268 269 if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) { 270 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n", 271 gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]); 272 err = -ENODEV; 273 goto fail2; 274 } 275 276 gameport_set_poll_handler(gameport, gf2k_poll); 277 gameport_set_poll_interval(gameport, 20); 278 279 snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys); 280 281 gf2k->length = gf2k_lens[gf2k->id]; 282 283 input_dev->name = gf2k_names[gf2k->id]; 284 input_dev->phys = gf2k->phys; 285 input_dev->id.bustype = BUS_GAMEPORT; 286 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS; 287 input_dev->id.product = gf2k->id; 288 input_dev->id.version = 0x0100; 289 input_dev->dev.parent = &gameport->dev; 290 291 input_set_drvdata(input_dev, gf2k); 292 293 input_dev->open = gf2k_open; 294 input_dev->close = gf2k_close; 295 296 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 297 298 for (i = 0; i < gf2k_axes[gf2k->id]; i++) 299 set_bit(gf2k_abs[i], input_dev->absbit); 300 301 for (i = 0; i < gf2k_hats[gf2k->id]; i++) 302 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0); 303 304 for (i = 0; i < gf2k_joys[gf2k->id]; i++) 305 set_bit(gf2k_btn_joy[i], input_dev->keybit); 306 307 for (i = 0; i < gf2k_pads[gf2k->id]; i++) 308 set_bit(gf2k_btn_pad[i], input_dev->keybit); 309 310 gf2k_read_packet(gameport, gf2k->length, data); 311 gf2k_read(gf2k, data); 312 313 for (i = 0; i < gf2k_axes[gf2k->id]; i++) { 314 int max = i < 2 ? 315 input_abs_get_val(input_dev, gf2k_abs[i]) * 2 : 316 input_abs_get_val(input_dev, gf2k_abs[0]) + 317 input_abs_get_val(input_dev, gf2k_abs[1]); 318 int flat = i < 2 ? 24 : 0; 319 320 input_set_abs_params(input_dev, gf2k_abs[i], 321 32, max - 32, 8, flat); 322 } 323 324 err = input_register_device(gf2k->dev); 325 if (err) 326 goto fail2; 327 328 return 0; 329 330 fail2: gameport_close(gameport); 331 fail1: gameport_set_drvdata(gameport, NULL); 332 input_free_device(input_dev); 333 kfree(gf2k); 334 return err; 335 } 336 337 static void gf2k_disconnect(struct gameport *gameport) 338 { 339 struct gf2k *gf2k = gameport_get_drvdata(gameport); 340 341 input_unregister_device(gf2k->dev); 342 gameport_close(gameport); 343 gameport_set_drvdata(gameport, NULL); 344 kfree(gf2k); 345 } 346 347 static struct gameport_driver gf2k_drv = { 348 .driver = { 349 .name = "gf2k", 350 }, 351 .description = DRIVER_DESC, 352 .connect = gf2k_connect, 353 .disconnect = gf2k_disconnect, 354 }; 355 356 module_gameport_driver(gf2k_drv); 357