1/* 2 * $Id: spaceball.c,v 1.1.1.1 2007/08/03 18:52:33 Exp $ 3 * 4 * Copyright (c) 1999-2001 Vojtech Pavlik 5 * 6 * Based on the work of: 7 * David Thompson 8 * Joseph Krahn 9 */ 10 11/* 12 * SpaceTec SpaceBall 2003/3003/4000 FLX driver for Linux 13 */ 14 15/* 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 * 30 * Should you need to contact me, the author, you can do so either by 31 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 32 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 33 */ 34 35#include <linux/kernel.h> 36#include <linux/slab.h> 37#include <linux/module.h> 38#include <linux/init.h> 39#include <linux/input.h> 40#include <linux/serio.h> 41 42#define DRIVER_DESC "SpaceTec SpaceBall 2003/3003/4000 FLX driver" 43 44MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 45MODULE_DESCRIPTION(DRIVER_DESC); 46MODULE_LICENSE("GPL"); 47 48/* 49 * Constants. 50 */ 51 52#define SPACEBALL_MAX_LENGTH 128 53#define SPACEBALL_MAX_ID 9 54 55#define SPACEBALL_1003 1 56#define SPACEBALL_2003B 3 57#define SPACEBALL_2003C 4 58#define SPACEBALL_3003C 7 59#define SPACEBALL_4000FLX 8 60#define SPACEBALL_4000FLX_L 9 61 62static int spaceball_axes[] = { ABS_X, ABS_Z, ABS_Y, ABS_RX, ABS_RZ, ABS_RY }; 63static char *spaceball_names[] = { 64 "?", "SpaceTec SpaceBall 1003", "SpaceTec SpaceBall 2003", "SpaceTec SpaceBall 2003B", 65 "SpaceTec SpaceBall 2003C", "SpaceTec SpaceBall 3003", "SpaceTec SpaceBall SpaceController", 66 "SpaceTec SpaceBall 3003C", "SpaceTec SpaceBall 4000FLX", "SpaceTec SpaceBall 4000FLX Lefty" }; 67 68/* 69 * Per-Ball data. 70 */ 71 72struct spaceball { 73 struct input_dev *dev; 74 int idx; 75 int escape; 76 unsigned char data[SPACEBALL_MAX_LENGTH]; 77 char phys[32]; 78}; 79 80/* 81 * spaceball_process_packet() decodes packets the driver receives from the 82 * SpaceBall. 83 */ 84 85static void spaceball_process_packet(struct spaceball* spaceball) 86{ 87 struct input_dev *dev = spaceball->dev; 88 unsigned char *data = spaceball->data; 89 int i; 90 91 if (spaceball->idx < 2) return; 92 93 switch (spaceball->data[0]) { 94 95 case 'D': /* Ball data */ 96 if (spaceball->idx != 15) return; 97 for (i = 0; i < 6; i++) 98 input_report_abs(dev, spaceball_axes[i], 99 (__s16)((data[2 * i + 3] << 8) | data[2 * i + 2])); 100 break; 101 102 case 'K': /* Button data */ 103 if (spaceball->idx != 3) return; 104 input_report_key(dev, BTN_1, (data[2] & 0x01) || (data[2] & 0x20)); 105 input_report_key(dev, BTN_2, data[2] & 0x02); 106 input_report_key(dev, BTN_3, data[2] & 0x04); 107 input_report_key(dev, BTN_4, data[2] & 0x08); 108 input_report_key(dev, BTN_5, data[1] & 0x01); 109 input_report_key(dev, BTN_6, data[1] & 0x02); 110 input_report_key(dev, BTN_7, data[1] & 0x04); 111 input_report_key(dev, BTN_8, data[1] & 0x10); 112 break; 113 114 case '.': /* Advanced button data */ 115 if (spaceball->idx != 3) return; 116 input_report_key(dev, BTN_1, data[2] & 0x01); 117 input_report_key(dev, BTN_2, data[2] & 0x02); 118 input_report_key(dev, BTN_3, data[2] & 0x04); 119 input_report_key(dev, BTN_4, data[2] & 0x08); 120 input_report_key(dev, BTN_5, data[2] & 0x10); 121 input_report_key(dev, BTN_6, data[2] & 0x20); 122 input_report_key(dev, BTN_7, data[2] & 0x80); 123 input_report_key(dev, BTN_8, data[1] & 0x01); 124 input_report_key(dev, BTN_9, data[1] & 0x02); 125 input_report_key(dev, BTN_A, data[1] & 0x04); 126 input_report_key(dev, BTN_B, data[1] & 0x08); 127 input_report_key(dev, BTN_C, data[1] & 0x10); 128 input_report_key(dev, BTN_MODE, data[1] & 0x20); 129 break; 130 131 case 'E': /* Device error */ 132 spaceball->data[spaceball->idx - 1] = 0; 133 printk(KERN_ERR "spaceball: Device error. [%s]\n", spaceball->data + 1); 134 break; 135 136 case '?': /* Bad command packet */ 137 spaceball->data[spaceball->idx - 1] = 0; 138 printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1); 139 break; 140 } 141 142 input_sync(dev); 143} 144 145/* 146 * Spaceball 4000 FLX packets all start with a one letter packet-type decriptor, 147 * and end in 0x0d. It uses '^' as an escape for CR, XOFF and XON characters which 148 * can occur in the axis values. 149 */ 150 151static irqreturn_t spaceball_interrupt(struct serio *serio, 152 unsigned char data, unsigned int flags) 153{ 154 struct spaceball *spaceball = serio_get_drvdata(serio); 155 156 switch (data) { 157 case 0xd: 158 spaceball_process_packet(spaceball); 159 spaceball->idx = 0; 160 spaceball->escape = 0; 161 break; 162 case '^': 163 if (!spaceball->escape) { 164 spaceball->escape = 1; 165 break; 166 } 167 spaceball->escape = 0; 168 case 'M': 169 case 'Q': 170 case 'S': 171 if (spaceball->escape) { 172 spaceball->escape = 0; 173 data &= 0x1f; 174 } 175 default: 176 if (spaceball->escape) 177 spaceball->escape = 0; 178 if (spaceball->idx < SPACEBALL_MAX_LENGTH) 179 spaceball->data[spaceball->idx++] = data; 180 break; 181 } 182 return IRQ_HANDLED; 183} 184 185/* 186 * spaceball_disconnect() is the opposite of spaceball_connect() 187 */ 188 189static void spaceball_disconnect(struct serio *serio) 190{ 191 struct spaceball* spaceball = serio_get_drvdata(serio); 192 193 serio_close(serio); 194 serio_set_drvdata(serio, NULL); 195 input_unregister_device(spaceball->dev); 196 kfree(spaceball); 197} 198 199/* 200 * spaceball_connect() is the routine that is called when someone adds a 201 * new serio device that supports Spaceball protocol and registers it as 202 * an input device. 203 */ 204 205static int spaceball_connect(struct serio *serio, struct serio_driver *drv) 206{ 207 struct spaceball *spaceball; 208 struct input_dev *input_dev; 209 int err = -ENOMEM; 210 int i, id; 211 212 if ((id = serio->id.id) > SPACEBALL_MAX_ID) 213 return -ENODEV; 214 215 spaceball = kmalloc(sizeof(struct spaceball), GFP_KERNEL); 216 input_dev = input_allocate_device(); 217 if (!spaceball || !input_dev) 218 goto fail1; 219 220 spaceball->dev = input_dev; 221 snprintf(spaceball->phys, sizeof(spaceball->phys), "%s/input0", serio->phys); 222 223 input_dev->name = spaceball_names[id]; 224 input_dev->phys = spaceball->phys; 225 input_dev->id.bustype = BUS_RS232; 226 input_dev->id.vendor = SERIO_SPACEBALL; 227 input_dev->id.product = id; 228 input_dev->id.version = 0x0100; 229 input_dev->dev.parent = &serio->dev; 230 231 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 232 233 switch (id) { 234 case SPACEBALL_4000FLX: 235 case SPACEBALL_4000FLX_L: 236 input_dev->keybit[LONG(BTN_0)] |= BIT(BTN_9); 237 input_dev->keybit[LONG(BTN_A)] |= BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_MODE); 238 default: 239 input_dev->keybit[LONG(BTN_0)] |= BIT(BTN_2) | BIT(BTN_3) | BIT(BTN_4) 240 | BIT(BTN_5) | BIT(BTN_6) | BIT(BTN_7) | BIT(BTN_8); 241 case SPACEBALL_3003C: 242 input_dev->keybit[LONG(BTN_0)] |= BIT(BTN_1) | BIT(BTN_8); 243 } 244 245 for (i = 0; i < 3; i++) { 246 input_set_abs_params(input_dev, ABS_X + i, -8000, 8000, 8, 40); 247 input_set_abs_params(input_dev, ABS_RX + i, -1600, 1600, 2, 8); 248 } 249 250 serio_set_drvdata(serio, spaceball); 251 252 err = serio_open(serio, drv); 253 if (err) 254 goto fail2; 255 256 err = input_register_device(spaceball->dev); 257 if (err) 258 goto fail3; 259 260 return 0; 261 262 fail3: serio_close(serio); 263 fail2: serio_set_drvdata(serio, NULL); 264 fail1: input_free_device(input_dev); 265 kfree(spaceball); 266 return err; 267} 268 269/* 270 * The serio driver structure. 271 */ 272 273static struct serio_device_id spaceball_serio_ids[] = { 274 { 275 .type = SERIO_RS232, 276 .proto = SERIO_SPACEBALL, 277 .id = SERIO_ANY, 278 .extra = SERIO_ANY, 279 }, 280 { 0 } 281}; 282 283MODULE_DEVICE_TABLE(serio, spaceball_serio_ids); 284 285static struct serio_driver spaceball_drv = { 286 .driver = { 287 .name = "spaceball", 288 }, 289 .description = DRIVER_DESC, 290 .id_table = spaceball_serio_ids, 291 .interrupt = spaceball_interrupt, 292 .connect = spaceball_connect, 293 .disconnect = spaceball_disconnect, 294}; 295 296/* 297 * The functions for inserting/removing us as a module. 298 */ 299 300static int __init spaceball_init(void) 301{ 302 return serio_register_driver(&spaceball_drv); 303} 304 305static void __exit spaceball_exit(void) 306{ 307 serio_unregister_driver(&spaceball_drv); 308} 309 310module_init(spaceball_init); 311module_exit(spaceball_exit); 312