1 /* 2 * $Id: warrior.c,v 1.14 2002/01/22 20:32:10 vojtech Exp $ 3 * 4 * Copyright (c) 1999-2001 Vojtech Pavlik 5 */ 6 7 /* 8 * Logitech WingMan Warrior joystick driver for Linux 9 */ 10 11 /* 12 * This program is free warftware; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 * Should you need to contact me, the author, you can do so either by 27 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 28 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 29 */ 30 31 #include <linux/kernel.h> 32 #include <linux/module.h> 33 #include <linux/slab.h> 34 #include <linux/input.h> 35 #include <linux/serio.h> 36 #include <linux/init.h> 37 38 #define DRIVER_DESC "Logitech WingMan Warrior joystick driver" 39 40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 41 MODULE_DESCRIPTION(DRIVER_DESC); 42 MODULE_LICENSE("GPL"); 43 44 /* 45 * Constants. 46 */ 47 48 #define WARRIOR_MAX_LENGTH 16 49 static char warrior_lengths[] = { 0, 4, 12, 3, 4, 4, 0, 0 }; 50 static char *warrior_name = "Logitech WingMan Warrior"; 51 52 /* 53 * Per-Warrior data. 54 */ 55 56 struct warrior { 57 struct input_dev dev; 58 int idx, len; 59 unsigned char data[WARRIOR_MAX_LENGTH]; 60 char phys[32]; 61 }; 62 63 /* 64 * warrior_process_packet() decodes packets the driver receives from the 65 * Warrior. It updates the data accordingly. 66 */ 67 68 static void warrior_process_packet(struct warrior *warrior, struct pt_regs *regs) 69 { 70 struct input_dev *dev = &warrior->dev; 71 unsigned char *data = warrior->data; 72 73 if (!warrior->idx) return; 74 75 input_regs(dev, regs); 76 77 switch ((data[0] >> 4) & 7) { 78 case 1: /* Button data */ 79 input_report_key(dev, BTN_TRIGGER, data[3] & 1); 80 input_report_key(dev, BTN_THUMB, (data[3] >> 1) & 1); 81 input_report_key(dev, BTN_TOP, (data[3] >> 2) & 1); 82 input_report_key(dev, BTN_TOP2, (data[3] >> 3) & 1); 83 break; 84 case 3: /* XY-axis info->data */ 85 input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5))); 86 input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7)); 87 break; 88 case 5: /* Throttle, spinner, hat info->data */ 89 input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7)); 90 input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0)); 91 input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0)); 92 input_report_rel(dev, REL_DIAL, (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5)); 93 break; 94 } 95 input_sync(dev); 96 } 97 98 /* 99 * warrior_interrupt() is called by the low level driver when characters 100 * are ready for us. We then buffer them for further processing, or call the 101 * packet processing routine. 102 */ 103 104 static irqreturn_t warrior_interrupt(struct serio *serio, 105 unsigned char data, unsigned int flags, struct pt_regs *regs) 106 { 107 struct warrior *warrior = serio_get_drvdata(serio); 108 109 if (data & 0x80) { 110 if (warrior->idx) warrior_process_packet(warrior, regs); 111 warrior->idx = 0; 112 warrior->len = warrior_lengths[(data >> 4) & 7]; 113 } 114 115 if (warrior->idx < warrior->len) 116 warrior->data[warrior->idx++] = data; 117 118 if (warrior->idx == warrior->len) { 119 if (warrior->idx) warrior_process_packet(warrior, regs); 120 warrior->idx = 0; 121 warrior->len = 0; 122 } 123 return IRQ_HANDLED; 124 } 125 126 /* 127 * warrior_disconnect() is the opposite of warrior_connect() 128 */ 129 130 static void warrior_disconnect(struct serio *serio) 131 { 132 struct warrior *warrior = serio_get_drvdata(serio); 133 134 input_unregister_device(&warrior->dev); 135 serio_close(serio); 136 serio_set_drvdata(serio, NULL); 137 kfree(warrior); 138 } 139 140 /* 141 * warrior_connect() is the routine that is called when someone adds a 142 * new serio device. It looks for the Warrior, and if found, registers 143 * it as an input device. 144 */ 145 146 static int warrior_connect(struct serio *serio, struct serio_driver *drv) 147 { 148 struct warrior *warrior; 149 int i; 150 int err; 151 152 if (!(warrior = kmalloc(sizeof(struct warrior), GFP_KERNEL))) 153 return -ENOMEM; 154 155 memset(warrior, 0, sizeof(struct warrior)); 156 157 warrior->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS); 158 warrior->dev.keybit[LONG(BTN_TRIGGER)] = BIT(BTN_TRIGGER) | BIT(BTN_THUMB) | BIT(BTN_TOP) | BIT(BTN_TOP2); 159 warrior->dev.relbit[0] = BIT(REL_DIAL); 160 warrior->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_THROTTLE) | BIT(ABS_HAT0X) | BIT(ABS_HAT0Y); 161 162 sprintf(warrior->phys, "%s/input0", serio->phys); 163 164 init_input_dev(&warrior->dev); 165 warrior->dev.name = warrior_name; 166 warrior->dev.phys = warrior->phys; 167 warrior->dev.id.bustype = BUS_RS232; 168 warrior->dev.id.vendor = SERIO_WARRIOR; 169 warrior->dev.id.product = 0x0001; 170 warrior->dev.id.version = 0x0100; 171 warrior->dev.dev = &serio->dev; 172 173 for (i = 0; i < 2; i++) { 174 warrior->dev.absmax[ABS_X+i] = -64; 175 warrior->dev.absmin[ABS_X+i] = 64; 176 warrior->dev.absflat[ABS_X+i] = 8; 177 } 178 179 warrior->dev.absmax[ABS_THROTTLE] = -112; 180 warrior->dev.absmin[ABS_THROTTLE] = 112; 181 182 for (i = 0; i < 2; i++) { 183 warrior->dev.absmax[ABS_HAT0X+i] = -1; 184 warrior->dev.absmin[ABS_HAT0X+i] = 1; 185 } 186 187 warrior->dev.private = warrior; 188 189 serio_set_drvdata(serio, warrior); 190 191 err = serio_open(serio, drv); 192 if (err) { 193 serio_set_drvdata(serio, NULL); 194 kfree(warrior); 195 return err; 196 } 197 198 input_register_device(&warrior->dev); 199 200 printk(KERN_INFO "input: Logitech WingMan Warrior on %s\n", serio->phys); 201 202 return 0; 203 } 204 205 /* 206 * The serio driver structure. 207 */ 208 209 static struct serio_device_id warrior_serio_ids[] = { 210 { 211 .type = SERIO_RS232, 212 .proto = SERIO_WARRIOR, 213 .id = SERIO_ANY, 214 .extra = SERIO_ANY, 215 }, 216 { 0 } 217 }; 218 219 MODULE_DEVICE_TABLE(serio, warrior_serio_ids); 220 221 static struct serio_driver warrior_drv = { 222 .driver = { 223 .name = "warrior", 224 }, 225 .description = DRIVER_DESC, 226 .id_table = warrior_serio_ids, 227 .interrupt = warrior_interrupt, 228 .connect = warrior_connect, 229 .disconnect = warrior_disconnect, 230 }; 231 232 /* 233 * The functions for inserting/removing us as a module. 234 */ 235 236 static int __init warrior_init(void) 237 { 238 serio_register_driver(&warrior_drv); 239 return 0; 240 } 241 242 static void __exit warrior_exit(void) 243 { 244 serio_unregister_driver(&warrior_drv); 245 } 246 247 module_init(warrior_init); 248 module_exit(warrior_exit); 249