drivers/input/joystick/spaceball.c

   1 /*
   2  * $Id: spaceball.c,v 1.17 2002/01/22 20:29:03 vojtech 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
  44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  45 MODULE_DESCRIPTION(DRIVER_DESC);
  46 MODULE_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
  62 static int spaceball_axes[] = { ABS_X, ABS_Z, ABS_Y, ABS_RX, ABS_RZ, ABS_RY };
  63 static 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
  72 struct 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
  85 static void spaceball_process_packet(struct spaceball* spaceball, struct pt_regs *regs)
  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         input_regs(dev, regs);
  94
  95         switch (spaceball->data[0]) {
  96
  97                 case 'D':                                       /* Ball data */
  98                         if (spaceball->idx != 15) return;
  99                         for (i = 0; i < 6; i++)
 100                                 input_report_abs(dev, spaceball_axes[i],
 101                                         (__s16)((data[2 * i + 3] << 8) | data[2 * i + 2]));
 102                         break;
 103
 104                 case 'K':                                       /* Button data */
 105                         if (spaceball->idx != 3) return;
 106                         input_report_key(dev, BTN_1, (data[2] & 0x01) || (data[2] & 0x20));
 107                         input_report_key(dev, BTN_2, data[2] & 0x02);
 108                         input_report_key(dev, BTN_3, data[2] & 0x04);
 109                         input_report_key(dev, BTN_4, data[2] & 0x08);
 110                         input_report_key(dev, BTN_5, data[1] & 0x01);
 111                         input_report_key(dev, BTN_6, data[1] & 0x02);
 112                         input_report_key(dev, BTN_7, data[1] & 0x04);
 113                         input_report_key(dev, BTN_8, data[1] & 0x10);
 114                         break;
 115
 116                 case '.':                                       /* Advanced button data */
 117                         if (spaceball->idx != 3) return;
 118                         input_report_key(dev, BTN_1, data[2] & 0x01);
 119                         input_report_key(dev, BTN_2, data[2] & 0x02);
 120                         input_report_key(dev, BTN_3, data[2] & 0x04);
 121                         input_report_key(dev, BTN_4, data[2] & 0x08);
 122                         input_report_key(dev, BTN_5, data[2] & 0x10);
 123                         input_report_key(dev, BTN_6, data[2] & 0x20);
 124                         input_report_key(dev, BTN_7, data[2] & 0x80);
 125                         input_report_key(dev, BTN_8, data[1] & 0x01);
 126                         input_report_key(dev, BTN_9, data[1] & 0x02);
 127                         input_report_key(dev, BTN_A, data[1] & 0x04);
 128                         input_report_key(dev, BTN_B, data[1] & 0x08);
 129                         input_report_key(dev, BTN_C, data[1] & 0x10);
 130                         input_report_key(dev, BTN_MODE, data[1] & 0x20);
 131                         break;
 132
 133                 case 'E':                                       /* Device error */
 134                         spaceball->data[spaceball->idx - 1] = 0;
 135                         printk(KERN_ERR "spaceball: Device error. [%s]\n", spaceball->data + 1);
 136                         break;
 137
 138                 case '?':                                       /* Bad command packet */
 139                         spaceball->data[spaceball->idx - 1] = 0;
 140                         printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1);
 141                         break;
 142         }
 143
 144         input_sync(dev);
 145 }
 146
 147 /*
 148  * Spaceball 4000 FLX packets all start with a one letter packet-type decriptor,
 149  * and end in 0x0d. It uses '^' as an escape for CR, XOFF and XON characters which
 150  * can occur in the axis values.
 151  */
 152
 153 static irqreturn_t spaceball_interrupt(struct serio *serio,
 154                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 155 {
 156         struct spaceball *spaceball = serio_get_drvdata(serio);
 157
 158         switch (data) {
 159                 case 0xd:
 160                         spaceball_process_packet(spaceball, regs);
 161                         spaceball->idx = 0;
 162                         spaceball->escape = 0;
 163                         break;
 164                 case '^':
 165                         if (!spaceball->escape) {
 166                                 spaceball->escape = 1;
 167                                 break;
 168                         }
 169                         spaceball->escape = 0;
 170                 case 'M':
 171                 case 'Q':
 172                 case 'S':
 173                         if (spaceball->escape) {
 174                                 spaceball->escape = 0;
 175                                 data &= 0x1f;
 176                         }
 177                 default:
 178                         if (spaceball->escape)
 179                                 spaceball->escape = 0;
 180                         if (spaceball->idx < SPACEBALL_MAX_LENGTH)
 181                                 spaceball->data[spaceball->idx++] = data;
 182                         break;
 183         }
 184         return IRQ_HANDLED;
 185 }
 186
 187 /*
 188  * spaceball_disconnect() is the opposite of spaceball_connect()
 189  */
 190
 191 static void spaceball_disconnect(struct serio *serio)
 192 {
 193         struct spaceball* spaceball = serio_get_drvdata(serio);
 194
 195         serio_close(serio);
 196         serio_set_drvdata(serio, NULL);
 197         input_unregister_device(spaceball->dev);
 198         kfree(spaceball);
 199 }
 200
 201 /*
 202  * spaceball_connect() is the routine that is called when someone adds a
 203  * new serio device that supports Spaceball protocol and registers it as
 204  * an input device.
 205  */
 206
 207 static int spaceball_connect(struct serio *serio, struct serio_driver *drv)
 208 {
 209         struct spaceball *spaceball;
 210         struct input_dev *input_dev;
 211         int err = -ENOMEM;
 212         int i, id;
 213
 214         if ((id = serio->id.id) > SPACEBALL_MAX_ID)
 215                 return -ENODEV;
 216
 217         spaceball = kmalloc(sizeof(struct spaceball), GFP_KERNEL);
 218         input_dev = input_allocate_device();
 219         if (!spaceball || !input_dev)
 220                 goto fail;
 221
 222         spaceball->dev = input_dev;
 223         snprintf(spaceball->phys, sizeof(spaceball->phys), "%s/input0", serio->phys);
 224
 225         input_dev->name = spaceball_names[id];
 226         input_dev->phys = spaceball->phys;
 227         input_dev->id.bustype = BUS_RS232;
 228         input_dev->id.vendor = SERIO_SPACEBALL;
 229         input_dev->id.product = id;
 230         input_dev->id.version = 0x0100;
 231         input_dev->cdev.dev = &serio->dev;
 232         input_dev->private = spaceball;
 233
 234         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 235
 236         switch (id) {
 237                 case SPACEBALL_4000FLX:
 238                 case SPACEBALL_4000FLX_L:
 239                         input_dev->keybit[LONG(BTN_0)] |= BIT(BTN_9);
 240                         input_dev->keybit[LONG(BTN_A)] |= BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_MODE);
 241                 default:
 242                         input_dev->keybit[LONG(BTN_0)] |= BIT(BTN_2) | BIT(BTN_3) | BIT(BTN_4)
 243                                 | BIT(BTN_5) | BIT(BTN_6) | BIT(BTN_7) | BIT(BTN_8);
 244                 case SPACEBALL_3003C:
 245                         input_dev->keybit[LONG(BTN_0)] |= BIT(BTN_1) | BIT(BTN_8);
 246         }
 247
 248         for (i = 0; i < 3; i++) {
 249                 input_set_abs_params(input_dev, ABS_X + i, -8000, 8000, 8, 40);
 250                 input_set_abs_params(input_dev, ABS_RX + i, -1600, 1600, 2, 8);
 251         }
 252
 253         serio_set_drvdata(serio, spaceball);
 254
 255         err = serio_open(serio, drv);
 256         if (err)
 257                 goto fail;
 258
 259         input_register_device(spaceball->dev);
 260         return 0;
 261
 262  fail:  serio_set_drvdata(serio, NULL);
 263         input_free_device(input_dev);
 264         kfree(spaceball);
 265         return err;
 266 }
 267
 268 /*
 269  * The serio driver structure.
 270  */
 271
 272 static struct serio_device_id spaceball_serio_ids[] = {
 273         {
 274                 .type   = SERIO_RS232,
 275                 .proto  = SERIO_SPACEBALL,
 276                 .id     = SERIO_ANY,
 277                 .extra  = SERIO_ANY,
 278         },
 279         { 0 }
 280 };
 281
 282 MODULE_DEVICE_TABLE(serio, spaceball_serio_ids);
 283
 284 static struct serio_driver spaceball_drv = {
 285         .driver         = {
 286                 .name   = "spaceball",
 287         },
 288         .description    = DRIVER_DESC,
 289         .id_table       = spaceball_serio_ids,
 290         .interrupt      = spaceball_interrupt,
 291         .connect        = spaceball_connect,
 292         .disconnect     = spaceball_disconnect,
 293 };
 294
 295 /*
 296  * The functions for inserting/removing us as a module.
 297  */
 298
 299 static int __init spaceball_init(void)
 300 {
 301         serio_register_driver(&spaceball_drv);
 302         return 0;
 303 }
 304
 305 static void __exit spaceball_exit(void)
 306 {
 307         serio_unregister_driver(&spaceball_drv);
 308 }
 309
 310 module_init(spaceball_init);
 311 module_exit(spaceball_exit);