1 /* 2 * $Id: interact.c,v 1.16 2002/01/22 20:28:25 vojtech Exp $ 3 * 4 * Copyright (c) 2001 Vojtech Pavlik 5 * 6 * Based on the work of: 7 * Toby Deshane 8 */ 9 10 /* 11 * InterAct digital gamepad/joystick driver for Linux 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 28 * 29 * Should you need to contact me, the author, you can do so either by 30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 31 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 32 */ 33 34 #include <linux/kernel.h> 35 #include <linux/slab.h> 36 #include <linux/module.h> 37 #include <linux/delay.h> 38 #include <linux/init.h> 39 #include <linux/gameport.h> 40 #include <linux/input.h> 41 42 #define DRIVER_DESC "InterAct digital joystick driver" 43 44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 45 MODULE_DESCRIPTION(DRIVER_DESC); 46 MODULE_LICENSE("GPL"); 47 48 #define INTERACT_MAX_START 600 /* 400 us */ 49 #define INTERACT_MAX_STROBE 60 /* 40 us */ 50 #define INTERACT_MAX_LENGTH 32 /* 32 bits */ 51 52 #define INTERACT_TYPE_HHFX 0 /* HammerHead/FX */ 53 #define INTERACT_TYPE_PP8D 1 /* ProPad 8 */ 54 55 struct interact { 56 struct gameport *gameport; 57 struct input_dev *dev; 58 int bads; 59 int reads; 60 unsigned char type; 61 unsigned char length; 62 char phys[32]; 63 }; 64 65 static short interact_abs_hhfx[] = 66 { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 }; 67 static short interact_abs_pp8d[] = 68 { ABS_X, ABS_Y, -1 }; 69 70 static short interact_btn_hhfx[] = 71 { BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL, BTN_TL2, BTN_TR2, BTN_MODE, BTN_SELECT, -1 }; 72 static short interact_btn_pp8d[] = 73 { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 }; 74 75 struct interact_type { 76 int id; 77 short *abs; 78 short *btn; 79 char *name; 80 unsigned char length; 81 unsigned char b8; 82 }; 83 84 static struct interact_type interact_type[] = { 85 { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX", 32, 4 }, 86 { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 }, 87 { 0 }}; 88 89 /* 90 * interact_read_packet() reads and InterAct joystick data. 91 */ 92 93 static int interact_read_packet(struct gameport *gameport, int length, u32 *data) 94 { 95 unsigned long flags; 96 unsigned char u, v; 97 unsigned int t, s; 98 int i; 99 100 i = 0; 101 data[0] = data[1] = data[2] = 0; 102 t = gameport_time(gameport, INTERACT_MAX_START); 103 s = gameport_time(gameport, INTERACT_MAX_STROBE); 104 105 local_irq_save(flags); 106 gameport_trigger(gameport); 107 v = gameport_read(gameport); 108 109 while (t > 0 && i < length) { 110 t--; 111 u = v; v = gameport_read(gameport); 112 if (v & ~u & 0x40) { 113 data[0] = (data[0] << 1) | ((v >> 4) & 1); 114 data[1] = (data[1] << 1) | ((v >> 5) & 1); 115 data[2] = (data[2] << 1) | ((v >> 7) & 1); 116 i++; 117 t = s; 118 } 119 } 120 121 local_irq_restore(flags); 122 123 return i; 124 } 125 126 /* 127 * interact_poll() reads and analyzes InterAct joystick data. 128 */ 129 130 static void interact_poll(struct gameport *gameport) 131 { 132 struct interact *interact = gameport_get_drvdata(gameport); 133 struct input_dev *dev = interact->dev; 134 u32 data[3]; 135 int i; 136 137 interact->reads++; 138 139 if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) { 140 interact->bads++; 141 } else { 142 143 for (i = 0; i < 3; i++) 144 data[i] <<= INTERACT_MAX_LENGTH - interact->length; 145 146 switch (interact->type) { 147 148 case INTERACT_TYPE_HHFX: 149 150 for (i = 0; i < 4; i++) 151 input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff); 152 153 for (i = 0; i < 2; i++) 154 input_report_abs(dev, ABS_HAT0Y - i, 155 ((data[1] >> ((i << 1) + 17)) & 1) - ((data[1] >> ((i << 1) + 16)) & 1)); 156 157 for (i = 0; i < 8; i++) 158 input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1); 159 160 for (i = 0; i < 4; i++) 161 input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1); 162 163 break; 164 165 case INTERACT_TYPE_PP8D: 166 167 for (i = 0; i < 2; i++) 168 input_report_abs(dev, interact_abs_pp8d[i], 169 ((data[0] >> ((i << 1) + 20)) & 1) - ((data[0] >> ((i << 1) + 21)) & 1)); 170 171 for (i = 0; i < 8; i++) 172 input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1); 173 174 break; 175 } 176 } 177 178 input_sync(dev); 179 } 180 181 /* 182 * interact_open() is a callback from the input open routine. 183 */ 184 185 static int interact_open(struct input_dev *dev) 186 { 187 struct interact *interact = dev->private; 188 189 gameport_start_polling(interact->gameport); 190 return 0; 191 } 192 193 /* 194 * interact_close() is a callback from the input close routine. 195 */ 196 197 static void interact_close(struct input_dev *dev) 198 { 199 struct interact *interact = dev->private; 200 201 gameport_stop_polling(interact->gameport); 202 } 203 204 /* 205 * interact_connect() probes for InterAct joysticks. 206 */ 207 208 static int interact_connect(struct gameport *gameport, struct gameport_driver *drv) 209 { 210 struct interact *interact; 211 struct input_dev *input_dev; 212 __u32 data[3]; 213 int i, t; 214 int err; 215 216 interact = kzalloc(sizeof(struct interact), GFP_KERNEL); 217 input_dev = input_allocate_device(); 218 if (!interact || !input_dev) { 219 err = -ENOMEM; 220 goto fail1; 221 } 222 223 interact->gameport = gameport; 224 interact->dev = input_dev; 225 226 gameport_set_drvdata(gameport, interact); 227 228 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 229 if (err) 230 goto fail1; 231 232 i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data); 233 234 if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) { 235 err = -ENODEV; 236 goto fail2; 237 } 238 239 for (i = 0; interact_type[i].length; i++) 240 if (interact_type[i].id == (data[2] >> 16)) 241 break; 242 243 if (!interact_type[i].length) { 244 printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n", 245 gameport->phys, i, data[0], data[1], data[2]); 246 err = -ENODEV; 247 goto fail2; 248 } 249 250 gameport_set_poll_handler(gameport, interact_poll); 251 gameport_set_poll_interval(gameport, 20); 252 253 sprintf(interact->phys, "%s/input0", gameport->phys); 254 255 interact->type = i; 256 interact->length = interact_type[i].length; 257 258 input_dev->name = interact_type[i].name; 259 input_dev->phys = interact->phys; 260 input_dev->id.bustype = BUS_GAMEPORT; 261 input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT; 262 input_dev->id.product = interact_type[i].id; 263 input_dev->id.version = 0x0100; 264 input_dev->private = interact; 265 266 input_dev->open = interact_open; 267 input_dev->close = interact_close; 268 269 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 270 271 for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) { 272 set_bit(t, input_dev->absbit); 273 if (i < interact_type[interact->type].b8) { 274 input_dev->absmin[t] = 0; 275 input_dev->absmax[t] = 255; 276 } else { 277 input_dev->absmin[t] = -1; 278 input_dev->absmax[t] = 1; 279 } 280 } 281 282 for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++) 283 set_bit(t, input_dev->keybit); 284 285 input_register_device(interact->dev); 286 287 return 0; 288 289 fail2: gameport_close(gameport); 290 fail1: gameport_set_drvdata(gameport, NULL); 291 input_free_device(input_dev); 292 kfree(interact); 293 return err; 294 } 295 296 static void interact_disconnect(struct gameport *gameport) 297 { 298 struct interact *interact = gameport_get_drvdata(gameport); 299 300 input_unregister_device(interact->dev); 301 gameport_close(gameport); 302 gameport_set_drvdata(gameport, NULL); 303 kfree(interact); 304 } 305 306 static struct gameport_driver interact_drv = { 307 .driver = { 308 .name = "interact", 309 }, 310 .description = DRIVER_DESC, 311 .connect = interact_connect, 312 .disconnect = interact_disconnect, 313 }; 314 315 static int __init interact_init(void) 316 { 317 gameport_register_driver(&interact_drv); 318 return 0; 319 } 320 321 static void __exit interact_exit(void) 322 { 323 gameport_unregister_driver(&interact_drv); 324 } 325 326 module_init(interact_init); 327 module_exit(interact_exit); 328