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 51 /* 52 * Per-Warrior data. 53 */ 54 55 struct warrior { 56 struct input_dev *dev; 57 int idx, len; 58 unsigned char data[WARRIOR_MAX_LENGTH]; 59 char phys[32]; 60 }; 61 62 /* 63 * warrior_process_packet() decodes packets the driver receives from the 64 * Warrior. It updates the data accordingly. 65 */ 66 67 static void warrior_process_packet(struct warrior *warrior, struct pt_regs *regs) 68 { 69 struct input_dev *dev = warrior->dev; 70 unsigned char *data = warrior->data; 71 72 if (!warrior->idx) return; 73 74 input_regs(dev, regs); 75 76 switch ((data[0] >> 4) & 7) { 77 case 1: /* Button data */ 78 input_report_key(dev, BTN_TRIGGER, data[3] & 1); 79 input_report_key(dev, BTN_THUMB, (data[3] >> 1) & 1); 80 input_report_key(dev, BTN_TOP, (data[3] >> 2) & 1); 81 input_report_key(dev, BTN_TOP2, (data[3] >> 3) & 1); 82 break; 83 case 3: /* XY-axis info->data */ 84 input_report_abs(dev, ABS_X, ((data[0] & 8) << 5) - (data[2] | ((data[0] & 4) << 5))); 85 input_report_abs(dev, ABS_Y, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7)); 86 break; 87 case 5: /* Throttle, spinner, hat info->data */ 88 input_report_abs(dev, ABS_THROTTLE, (data[1] | ((data[0] & 1) << 7)) - ((data[0] & 2) << 7)); 89 input_report_abs(dev, ABS_HAT0X, (data[3] & 2 ? 1 : 0) - (data[3] & 1 ? 1 : 0)); 90 input_report_abs(dev, ABS_HAT0Y, (data[3] & 8 ? 1 : 0) - (data[3] & 4 ? 1 : 0)); 91 input_report_rel(dev, REL_DIAL, (data[2] | ((data[0] & 4) << 5)) - ((data[0] & 8) << 5)); 92 break; 93 } 94 input_sync(dev); 95 } 96 97 /* 98 * warrior_interrupt() is called by the low level driver when characters 99 * are ready for us. We then buffer them for further processing, or call the 100 * packet processing routine. 101 */ 102 103 static irqreturn_t warrior_interrupt(struct serio *serio, 104 unsigned char data, unsigned int flags, struct pt_regs *regs) 105 { 106 struct warrior *warrior = serio_get_drvdata(serio); 107 108 if (data & 0x80) { 109 if (warrior->idx) warrior_process_packet(warrior, regs); 110 warrior->idx = 0; 111 warrior->len = warrior_lengths[(data >> 4) & 7]; 112 } 113 114 if (warrior->idx < warrior->len) 115 warrior->data[warrior->idx++] = data; 116 117 if (warrior->idx == warrior->len) { 118 if (warrior->idx) warrior_process_packet(warrior, regs); 119 warrior->idx = 0; 120 warrior->len = 0; 121 } 122 return IRQ_HANDLED; 123 } 124 125 /* 126 * warrior_disconnect() is the opposite of warrior_connect() 127 */ 128 129 static void warrior_disconnect(struct serio *serio) 130 { 131 struct warrior *warrior = serio_get_drvdata(serio); 132 133 serio_close(serio); 134 serio_set_drvdata(serio, NULL); 135 input_unregister_device(warrior->dev); 136 kfree(warrior); 137 } 138 139 /* 140 * warrior_connect() is the routine that is called when someone adds a 141 * new serio device. It looks for the Warrior, and if found, registers 142 * it as an input device. 143 */ 144 145 static int warrior_connect(struct serio *serio, struct serio_driver *drv) 146 { 147 struct warrior *warrior; 148 struct input_dev *input_dev; 149 int err = -ENOMEM; 150 151 warrior = kzalloc(sizeof(struct warrior), GFP_KERNEL); 152 input_dev = input_allocate_device(); 153 if (!warrior || !input_dev) 154 goto fail; 155 156 warrior->dev = input_dev; 157 sprintf(warrior->phys, "%s/input0", serio->phys); 158 159 input_dev->name = "Logitech WingMan Warrior"; 160 input_dev->phys = warrior->phys; 161 input_dev->id.bustype = BUS_RS232; 162 input_dev->id.vendor = SERIO_WARRIOR; 163 input_dev->id.product = 0x0001; 164 input_dev->id.version = 0x0100; 165 input_dev->cdev.dev = &serio->dev; 166 input_dev->private = warrior; 167 168 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS); 169 input_dev->keybit[LONG(BTN_TRIGGER)] = BIT(BTN_TRIGGER) | BIT(BTN_THUMB) | BIT(BTN_TOP) | BIT(BTN_TOP2); 170 input_dev->relbit[0] = BIT(REL_DIAL); 171 input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 8); 172 input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 8); 173 input_set_abs_params(input_dev, ABS_THROTTLE, -112, 112, 0, 0); 174 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0); 175 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0); 176 177 serio_set_drvdata(serio, warrior); 178 179 err = serio_open(serio, drv); 180 if (err) 181 goto fail; 182 183 input_register_device(warrior->dev); 184 return 0; 185 186 fail: serio_set_drvdata(serio, NULL); 187 input_free_device(input_dev); 188 kfree(warrior); 189 return err; 190 } 191 192 /* 193 * The serio driver structure. 194 */ 195 196 static struct serio_device_id warrior_serio_ids[] = { 197 { 198 .type = SERIO_RS232, 199 .proto = SERIO_WARRIOR, 200 .id = SERIO_ANY, 201 .extra = SERIO_ANY, 202 }, 203 { 0 } 204 }; 205 206 MODULE_DEVICE_TABLE(serio, warrior_serio_ids); 207 208 static struct serio_driver warrior_drv = { 209 .driver = { 210 .name = "warrior", 211 }, 212 .description = DRIVER_DESC, 213 .id_table = warrior_serio_ids, 214 .interrupt = warrior_interrupt, 215 .connect = warrior_connect, 216 .disconnect = warrior_disconnect, 217 }; 218 219 /* 220 * The functions for inserting/removing us as a module. 221 */ 222 223 static int __init warrior_init(void) 224 { 225 serio_register_driver(&warrior_drv); 226 return 0; 227 } 228 229 static void __exit warrior_exit(void) 230 { 231 serio_unregister_driver(&warrior_drv); 232 } 233 234 module_init(warrior_init); 235 module_exit(warrior_exit); 236