1 /* 2 * Copyright (c) 2001 Vojtech Pavlik 3 */ 4 5 /* 6 * Guillemot Digital Interface Protocol 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/kernel.h> 30 #include <linux/slab.h> 31 #include <linux/module.h> 32 #include <linux/delay.h> 33 #include <linux/gameport.h> 34 #include <linux/input.h> 35 #include <linux/jiffies.h> 36 37 #define DRIVER_DESC "Guillemot Digital joystick driver" 38 39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 40 MODULE_DESCRIPTION(DRIVER_DESC); 41 MODULE_LICENSE("GPL"); 42 43 #define GUILLEMOT_MAX_START 600 /* 600 us */ 44 #define GUILLEMOT_MAX_STROBE 60 /* 60 us */ 45 #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */ 46 47 static short guillemot_abs_pad[] = 48 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 }; 49 50 static short guillemot_btn_pad[] = 51 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 }; 52 53 static struct { 54 int x; 55 int y; 56 } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 57 58 struct guillemot_type { 59 unsigned char id; 60 short *abs; 61 short *btn; 62 int hat; 63 char *name; 64 }; 65 66 struct guillemot { 67 struct gameport *gameport; 68 struct input_dev *dev; 69 int bads; 70 int reads; 71 struct guillemot_type *type; 72 unsigned char length; 73 char phys[32]; 74 }; 75 76 static struct guillemot_type guillemot_type[] = { 77 { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" }, 78 { 0 }}; 79 80 /* 81 * guillemot_read_packet() reads Guillemot joystick data. 82 */ 83 84 static int guillemot_read_packet(struct gameport *gameport, u8 *data) 85 { 86 unsigned long flags; 87 unsigned char u, v; 88 unsigned int t, s; 89 int i; 90 91 for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++) 92 data[i] = 0; 93 94 i = 0; 95 t = gameport_time(gameport, GUILLEMOT_MAX_START); 96 s = gameport_time(gameport, GUILLEMOT_MAX_STROBE); 97 98 local_irq_save(flags); 99 gameport_trigger(gameport); 100 v = gameport_read(gameport); 101 102 while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) { 103 t--; 104 u = v; v = gameport_read(gameport); 105 if (v & ~u & 0x10) { 106 data[i >> 3] |= ((v >> 5) & 1) << (i & 7); 107 i++; 108 t = s; 109 } 110 } 111 112 local_irq_restore(flags); 113 114 return i; 115 } 116 117 /* 118 * guillemot_poll() reads and analyzes Guillemot joystick data. 119 */ 120 121 static void guillemot_poll(struct gameport *gameport) 122 { 123 struct guillemot *guillemot = gameport_get_drvdata(gameport); 124 struct input_dev *dev = guillemot->dev; 125 u8 data[GUILLEMOT_MAX_LENGTH]; 126 int i; 127 128 guillemot->reads++; 129 130 if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 || 131 data[0] != 0x55 || data[16] != 0xaa) { 132 guillemot->bads++; 133 } else { 134 135 for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++) 136 input_report_abs(dev, guillemot->type->abs[i], data[i + 5]); 137 138 if (guillemot->type->hat) { 139 input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x); 140 input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y); 141 } 142 143 for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++) 144 input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1); 145 } 146 147 input_sync(dev); 148 } 149 150 /* 151 * guillemot_open() is a callback from the input open routine. 152 */ 153 154 static int guillemot_open(struct input_dev *dev) 155 { 156 struct guillemot *guillemot = input_get_drvdata(dev); 157 158 gameport_start_polling(guillemot->gameport); 159 return 0; 160 } 161 162 /* 163 * guillemot_close() is a callback from the input close routine. 164 */ 165 166 static void guillemot_close(struct input_dev *dev) 167 { 168 struct guillemot *guillemot = input_get_drvdata(dev); 169 170 gameport_stop_polling(guillemot->gameport); 171 } 172 173 /* 174 * guillemot_connect() probes for Guillemot joysticks. 175 */ 176 177 static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv) 178 { 179 struct guillemot *guillemot; 180 struct input_dev *input_dev; 181 u8 data[GUILLEMOT_MAX_LENGTH]; 182 int i, t; 183 int err; 184 185 guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL); 186 input_dev = input_allocate_device(); 187 if (!guillemot || !input_dev) { 188 err = -ENOMEM; 189 goto fail1; 190 } 191 192 guillemot->gameport = gameport; 193 guillemot->dev = input_dev; 194 195 gameport_set_drvdata(gameport, guillemot); 196 197 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 198 if (err) 199 goto fail1; 200 201 i = guillemot_read_packet(gameport, data); 202 203 if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) { 204 err = -ENODEV; 205 goto fail2; 206 } 207 208 for (i = 0; guillemot_type[i].name; i++) 209 if (guillemot_type[i].id == data[11]) 210 break; 211 212 if (!guillemot_type[i].name) { 213 printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n", 214 gameport->phys, data[12], data[13], data[11], data[14], data[15]); 215 err = -ENODEV; 216 goto fail2; 217 } 218 219 gameport_set_poll_handler(gameport, guillemot_poll); 220 gameport_set_poll_interval(gameport, 20); 221 222 snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys); 223 guillemot->type = guillemot_type + i; 224 225 input_dev->name = guillemot_type[i].name; 226 input_dev->phys = guillemot->phys; 227 input_dev->id.bustype = BUS_GAMEPORT; 228 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT; 229 input_dev->id.product = guillemot_type[i].id; 230 input_dev->id.version = (int)data[14] << 8 | data[15]; 231 input_dev->dev.parent = &gameport->dev; 232 233 input_set_drvdata(input_dev, guillemot); 234 235 input_dev->open = guillemot_open; 236 input_dev->close = guillemot_close; 237 238 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 239 240 for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++) 241 input_set_abs_params(input_dev, t, 0, 255, 0, 0); 242 243 if (guillemot->type->hat) { 244 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0); 245 input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0); 246 } 247 248 for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++) 249 set_bit(t, input_dev->keybit); 250 251 err = input_register_device(guillemot->dev); 252 if (err) 253 goto fail2; 254 255 return 0; 256 257 fail2: gameport_close(gameport); 258 fail1: gameport_set_drvdata(gameport, NULL); 259 input_free_device(input_dev); 260 kfree(guillemot); 261 return err; 262 } 263 264 static void guillemot_disconnect(struct gameport *gameport) 265 { 266 struct guillemot *guillemot = gameport_get_drvdata(gameport); 267 268 printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys); 269 input_unregister_device(guillemot->dev); 270 gameport_close(gameport); 271 kfree(guillemot); 272 } 273 274 static struct gameport_driver guillemot_drv = { 275 .driver = { 276 .name = "guillemot", 277 }, 278 .description = DRIVER_DESC, 279 .connect = guillemot_connect, 280 .disconnect = guillemot_disconnect, 281 }; 282 283 module_gameport_driver(guillemot_drv); 284