1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2001 Vojtech Pavlik 4 * 5 * Based on the work of: 6 * Toby Deshane 7 */ 8 9 /* 10 * InterAct digital gamepad/joystick driver for Linux 11 */ 12 13 /* 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/slab.h> 18 #include <linux/module.h> 19 #include <linux/delay.h> 20 #include <linux/gameport.h> 21 #include <linux/input.h> 22 #include <linux/jiffies.h> 23 24 #define DRIVER_DESC "InterAct digital joystick driver" 25 26 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 27 MODULE_DESCRIPTION(DRIVER_DESC); 28 MODULE_LICENSE("GPL"); 29 30 #define INTERACT_MAX_START 600 /* 400 us */ 31 #define INTERACT_MAX_STROBE 60 /* 40 us */ 32 #define INTERACT_MAX_LENGTH 32 /* 32 bits */ 33 34 #define INTERACT_TYPE_HHFX 0 /* HammerHead/FX */ 35 #define INTERACT_TYPE_PP8D 1 /* ProPad 8 */ 36 37 struct interact { 38 struct gameport *gameport; 39 struct input_dev *dev; 40 int bads; 41 int reads; 42 unsigned char type; 43 unsigned char length; 44 char phys[32]; 45 }; 46 47 static short interact_abs_hhfx[] = 48 { ABS_RX, ABS_RY, ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y, -1 }; 49 static short interact_abs_pp8d[] = 50 { ABS_X, ABS_Y, -1 }; 51 52 static short interact_btn_hhfx[] = 53 { 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 }; 54 static short interact_btn_pp8d[] = 55 { BTN_C, BTN_TL, BTN_TR, BTN_A, BTN_B, BTN_Y, BTN_Z, BTN_X, -1 }; 56 57 struct interact_type { 58 int id; 59 short *abs; 60 short *btn; 61 char *name; 62 unsigned char length; 63 unsigned char b8; 64 }; 65 66 static struct interact_type interact_type[] = { 67 { 0x6202, interact_abs_hhfx, interact_btn_hhfx, "InterAct HammerHead/FX", 32, 4 }, 68 { 0x53f8, interact_abs_pp8d, interact_btn_pp8d, "InterAct ProPad 8 Digital", 16, 0 }, 69 { 0 }}; 70 71 /* 72 * interact_read_packet() reads and InterAct joystick data. 73 */ 74 75 static int interact_read_packet(struct gameport *gameport, int length, u32 *data) 76 { 77 unsigned long flags; 78 unsigned char u, v; 79 unsigned int t, s; 80 int i; 81 82 i = 0; 83 data[0] = data[1] = data[2] = 0; 84 t = gameport_time(gameport, INTERACT_MAX_START); 85 s = gameport_time(gameport, INTERACT_MAX_STROBE); 86 87 local_irq_save(flags); 88 gameport_trigger(gameport); 89 v = gameport_read(gameport); 90 91 while (t > 0 && i < length) { 92 t--; 93 u = v; v = gameport_read(gameport); 94 if (v & ~u & 0x40) { 95 data[0] = (data[0] << 1) | ((v >> 4) & 1); 96 data[1] = (data[1] << 1) | ((v >> 5) & 1); 97 data[2] = (data[2] << 1) | ((v >> 7) & 1); 98 i++; 99 t = s; 100 } 101 } 102 103 local_irq_restore(flags); 104 105 return i; 106 } 107 108 /* 109 * interact_poll() reads and analyzes InterAct joystick data. 110 */ 111 112 static void interact_poll(struct gameport *gameport) 113 { 114 struct interact *interact = gameport_get_drvdata(gameport); 115 struct input_dev *dev = interact->dev; 116 u32 data[3]; 117 int i; 118 119 interact->reads++; 120 121 if (interact_read_packet(interact->gameport, interact->length, data) < interact->length) { 122 interact->bads++; 123 } else { 124 125 for (i = 0; i < 3; i++) 126 data[i] <<= INTERACT_MAX_LENGTH - interact->length; 127 128 switch (interact->type) { 129 130 case INTERACT_TYPE_HHFX: 131 132 for (i = 0; i < 4; i++) 133 input_report_abs(dev, interact_abs_hhfx[i], (data[i & 1] >> ((i >> 1) << 3)) & 0xff); 134 135 for (i = 0; i < 2; i++) 136 input_report_abs(dev, ABS_HAT0Y - i, 137 ((data[1] >> ((i << 1) + 17)) & 1) - ((data[1] >> ((i << 1) + 16)) & 1)); 138 139 for (i = 0; i < 8; i++) 140 input_report_key(dev, interact_btn_hhfx[i], (data[0] >> (i + 16)) & 1); 141 142 for (i = 0; i < 4; i++) 143 input_report_key(dev, interact_btn_hhfx[i + 8], (data[1] >> (i + 20)) & 1); 144 145 break; 146 147 case INTERACT_TYPE_PP8D: 148 149 for (i = 0; i < 2; i++) 150 input_report_abs(dev, interact_abs_pp8d[i], 151 ((data[0] >> ((i << 1) + 20)) & 1) - ((data[0] >> ((i << 1) + 21)) & 1)); 152 153 for (i = 0; i < 8; i++) 154 input_report_key(dev, interact_btn_pp8d[i], (data[1] >> (i + 16)) & 1); 155 156 break; 157 } 158 } 159 160 input_sync(dev); 161 } 162 163 /* 164 * interact_open() is a callback from the input open routine. 165 */ 166 167 static int interact_open(struct input_dev *dev) 168 { 169 struct interact *interact = input_get_drvdata(dev); 170 171 gameport_start_polling(interact->gameport); 172 return 0; 173 } 174 175 /* 176 * interact_close() is a callback from the input close routine. 177 */ 178 179 static void interact_close(struct input_dev *dev) 180 { 181 struct interact *interact = input_get_drvdata(dev); 182 183 gameport_stop_polling(interact->gameport); 184 } 185 186 /* 187 * interact_connect() probes for InterAct joysticks. 188 */ 189 190 static int interact_connect(struct gameport *gameport, struct gameport_driver *drv) 191 { 192 struct interact *interact; 193 struct input_dev *input_dev; 194 __u32 data[3]; 195 int i, t; 196 int err; 197 198 interact = kzalloc(sizeof(struct interact), GFP_KERNEL); 199 input_dev = input_allocate_device(); 200 if (!interact || !input_dev) { 201 err = -ENOMEM; 202 goto fail1; 203 } 204 205 interact->gameport = gameport; 206 interact->dev = input_dev; 207 208 gameport_set_drvdata(gameport, interact); 209 210 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 211 if (err) 212 goto fail1; 213 214 i = interact_read_packet(gameport, INTERACT_MAX_LENGTH * 2, data); 215 216 if (i != 32 || (data[0] >> 24) != 0x0c || (data[1] >> 24) != 0x02) { 217 err = -ENODEV; 218 goto fail2; 219 } 220 221 for (i = 0; interact_type[i].length; i++) 222 if (interact_type[i].id == (data[2] >> 16)) 223 break; 224 225 if (!interact_type[i].length) { 226 printk(KERN_WARNING "interact.c: Unknown joystick on %s. [len %d d0 %08x d1 %08x i2 %08x]\n", 227 gameport->phys, i, data[0], data[1], data[2]); 228 err = -ENODEV; 229 goto fail2; 230 } 231 232 gameport_set_poll_handler(gameport, interact_poll); 233 gameport_set_poll_interval(gameport, 20); 234 235 snprintf(interact->phys, sizeof(interact->phys), "%s/input0", gameport->phys); 236 237 interact->type = i; 238 interact->length = interact_type[i].length; 239 240 input_dev->name = interact_type[i].name; 241 input_dev->phys = interact->phys; 242 input_dev->id.bustype = BUS_GAMEPORT; 243 input_dev->id.vendor = GAMEPORT_ID_VENDOR_INTERACT; 244 input_dev->id.product = interact_type[i].id; 245 input_dev->id.version = 0x0100; 246 input_dev->dev.parent = &gameport->dev; 247 248 input_set_drvdata(input_dev, interact); 249 250 input_dev->open = interact_open; 251 input_dev->close = interact_close; 252 253 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 254 255 for (i = 0; (t = interact_type[interact->type].abs[i]) >= 0; i++) { 256 if (i < interact_type[interact->type].b8) 257 input_set_abs_params(input_dev, t, 0, 255, 0, 0); 258 else 259 input_set_abs_params(input_dev, t, -1, 1, 0, 0); 260 } 261 262 for (i = 0; (t = interact_type[interact->type].btn[i]) >= 0; i++) 263 __set_bit(t, input_dev->keybit); 264 265 err = input_register_device(interact->dev); 266 if (err) 267 goto fail2; 268 269 return 0; 270 271 fail2: gameport_close(gameport); 272 fail1: gameport_set_drvdata(gameport, NULL); 273 input_free_device(input_dev); 274 kfree(interact); 275 return err; 276 } 277 278 static void interact_disconnect(struct gameport *gameport) 279 { 280 struct interact *interact = gameport_get_drvdata(gameport); 281 282 input_unregister_device(interact->dev); 283 gameport_close(gameport); 284 gameport_set_drvdata(gameport, NULL); 285 kfree(interact); 286 } 287 288 static struct gameport_driver interact_drv = { 289 .driver = { 290 .name = "interact", 291 }, 292 .description = DRIVER_DESC, 293 .connect = interact_connect, 294 .disconnect = interact_disconnect, 295 }; 296 297 module_gameport_driver(interact_drv); 298