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