drivers/input/joystick/spaceball.c

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