drivers/input/joystick/spaceorb.c

   1 /*
   2  * $Id: spaceorb.c,v 1.15 2002/01/22 20:29:19 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  *
   6  *  Based on the work of:
   7  *      David Thompson
   8  */
   9
  10 /*
  11  * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  *
  29  *  Should you need to contact me, the author, you can do so either by
  30  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  31  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/slab.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/input.h>
  39 #include <linux/serio.h>
  40
  41 #define DRIVER_DESC     "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
  42
  43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  44 MODULE_DESCRIPTION(DRIVER_DESC);
  45 MODULE_LICENSE("GPL");
  46
  47 /*
  48  * Constants.
  49  */
  50
  51 #define SPACEORB_MAX_LENGTH     64
  52
  53 static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
  54 static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
  55 static char *spaceorb_name = "SpaceTec SpaceOrb 360 / Avenger";
  56
  57 /*
  58  * Per-Orb data.
  59  */
  60
  61 struct spaceorb {
  62         struct input_dev dev;
  63         struct serio *serio;
  64         int idx;
  65         unsigned char data[SPACEORB_MAX_LENGTH];
  66         char phys[32];
  67 };
  68
  69 static unsigned char spaceorb_xor[] = "SpaceWare";
  70
  71 static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
  72                 "Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
  73
  74 /*
  75  * spaceorb_process_packet() decodes packets the driver receives from the
  76  * SpaceOrb.
  77  */
  78
  79 static void spaceorb_process_packet(struct spaceorb *spaceorb, struct pt_regs *regs)
  80 {
  81         struct input_dev *dev = &spaceorb->dev;
  82         unsigned char *data = spaceorb->data;
  83         unsigned char c = 0;
  84         int axes[6];
  85         int i;
  86
  87         if (spaceorb->idx < 2) return;
  88         for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
  89         if (c) return;
  90
  91         input_regs(dev, regs);
  92
  93         switch (data[0]) {
  94
  95                 case 'R':                               /* Reset packet */
  96                         spaceorb->data[spaceorb->idx - 1] = 0;
  97                         for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
  98                         printk(KERN_INFO "input: %s [%s] on %s\n",
  99                                  spaceorb_name, spaceorb->data + i, spaceorb->serio->phys);
 100                         break;
 101
 102                 case 'D':                               /* Ball + button data */
 103                         if (spaceorb->idx != 12) return;
 104                         for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
 105                         axes[0] = ( data[2]      << 3) | (data[ 3] >> 4);
 106                         axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
 107                         axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
 108                         axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
 109                         axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
 110                         axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
 111                         for (i = 0; i < 6; i++)
 112                                 input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
 113                         for (i = 0; i < 6; i++)
 114                                 input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
 115                         break;
 116
 117                 case 'K':                               /* Button data */
 118                         if (spaceorb->idx != 5) return;
 119                         for (i = 0; i < 7; i++)
 120                                 input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
 121
 122                         break;
 123
 124                 case 'E':                               /* Error packet */
 125                         if (spaceorb->idx != 4) return;
 126                         printk(KERN_ERR "joy-spaceorb: Device error. [ ");
 127                         for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
 128                         printk("]\n");
 129                         break;
 130         }
 131
 132         input_sync(dev);
 133 }
 134
 135 static irqreturn_t spaceorb_interrupt(struct serio *serio,
 136                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 137 {
 138         struct spaceorb* spaceorb = serio->private;
 139
 140         if (~data & 0x80) {
 141                 if (spaceorb->idx) spaceorb_process_packet(spaceorb, regs);
 142                 spaceorb->idx = 0;
 143         }
 144         if (spaceorb->idx < SPACEORB_MAX_LENGTH)
 145                 spaceorb->data[spaceorb->idx++] = data & 0x7f;
 146         return IRQ_HANDLED;
 147 }
 148
 149 /*
 150  * spaceorb_disconnect() is the opposite of spaceorb_connect()
 151  */
 152
 153 static void spaceorb_disconnect(struct serio *serio)
 154 {
 155         struct spaceorb* spaceorb = serio->private;
 156         input_unregister_device(&spaceorb->dev);
 157         serio_close(serio);
 158         kfree(spaceorb);
 159 }
 160
 161 /*
 162  * spaceorb_connect() is the routine that is called when someone adds a
 163  * new serio device. It looks for the SpaceOrb/Avenger, and if found, registers
 164  * it as an input device.
 165  */
 166
 167 static void spaceorb_connect(struct serio *serio, struct serio_driver *drv)
 168 {
 169         struct spaceorb *spaceorb;
 170         int i, t;
 171
 172         if (serio->type != (SERIO_RS232 | SERIO_SPACEORB))
 173                 return;
 174
 175         if (!(spaceorb = kmalloc(sizeof(struct spaceorb), GFP_KERNEL)))
 176                 return;
 177         memset(spaceorb, 0, sizeof(struct spaceorb));
 178
 179         spaceorb->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 180
 181         for (i = 0; i < 6; i++)
 182                 set_bit(spaceorb_buttons[i], spaceorb->dev.keybit);
 183
 184         for (i = 0; i < 6; i++) {
 185                 t = spaceorb_axes[i];
 186                 set_bit(t, spaceorb->dev.absbit);
 187                 spaceorb->dev.absmin[t] = -508;
 188                 spaceorb->dev.absmax[t] =  508;
 189         }
 190
 191         spaceorb->serio = serio;
 192         spaceorb->dev.private = spaceorb;
 193
 194         sprintf(spaceorb->phys, "%s/input0", serio->phys);
 195
 196         init_input_dev(&spaceorb->dev);
 197         spaceorb->dev.name = spaceorb_name;
 198         spaceorb->dev.phys = spaceorb->phys;
 199         spaceorb->dev.id.bustype = BUS_RS232;
 200         spaceorb->dev.id.vendor = SERIO_SPACEORB;
 201         spaceorb->dev.id.product = 0x0001;
 202         spaceorb->dev.id.version = 0x0100;
 203
 204         serio->private = spaceorb;
 205
 206         if (serio_open(serio, drv)) {
 207                 kfree(spaceorb);
 208                 return;
 209         }
 210
 211         input_register_device(&spaceorb->dev);
 212 }
 213
 214 /*
 215  * The serio device structure.
 216  */
 217
 218 static struct serio_driver spaceorb_drv = {
 219         .driver         = {
 220                 .name   = "spaceorb",
 221         },
 222         .description    = DRIVER_DESC,
 223         .interrupt      = spaceorb_interrupt,
 224         .connect        = spaceorb_connect,
 225         .disconnect     = spaceorb_disconnect,
 226 };
 227
 228 /*
 229  * The functions for inserting/removing us as a module.
 230  */
 231
 232 int __init spaceorb_init(void)
 233 {
 234         serio_register_driver(&spaceorb_drv);
 235         return 0;
 236 }
 237
 238 void __exit spaceorb_exit(void)
 239 {
 240         serio_unregister_driver(&spaceorb_drv);
 241 }
 242
 243 module_init(spaceorb_init);
 244 module_exit(spaceorb_exit);