drivers/input/joystick/spaceorb.c

   1 /*
   2  *  Copyright (c) 1999-2001 Vojtech Pavlik
   3  *
   4  *  Based on the work of:
   5  *      David Thompson
   6  */
   7
   8 /*
   9  * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
  10  */
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/slab.h>
  30 #include <linux/module.h>
  31 #include <linux/input.h>
  32 #include <linux/serio.h>
  33
  34 #define DRIVER_DESC     "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
  35
  36 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  37 MODULE_DESCRIPTION(DRIVER_DESC);
  38 MODULE_LICENSE("GPL");
  39
  40 /*
  41  * Constants.
  42  */
  43
  44 #define SPACEORB_MAX_LENGTH     64
  45
  46 static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
  47 static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
  48
  49 /*
  50  * Per-Orb data.
  51  */
  52
  53 struct spaceorb {
  54         struct input_dev *dev;
  55         int idx;
  56         unsigned char data[SPACEORB_MAX_LENGTH];
  57         char phys[32];
  58 };
  59
  60 static unsigned char spaceorb_xor[] = "SpaceWare";
  61
  62 static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
  63                 "Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
  64
  65 /*
  66  * spaceorb_process_packet() decodes packets the driver receives from the
  67  * SpaceOrb.
  68  */
  69
  70 static void spaceorb_process_packet(struct spaceorb *spaceorb)
  71 {
  72         struct input_dev *dev = spaceorb->dev;
  73         unsigned char *data = spaceorb->data;
  74         unsigned char c = 0;
  75         int axes[6];
  76         int i;
  77
  78         if (spaceorb->idx < 2) return;
  79         for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
  80         if (c) return;
  81
  82         switch (data[0]) {
  83
  84                 case 'R':                               /* Reset packet */
  85                         spaceorb->data[spaceorb->idx - 1] = 0;
  86                         for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
  87                         printk(KERN_INFO "input: %s [%s] is %s\n",
  88                                  dev->name, spaceorb->data + i, spaceorb->phys);
  89                         break;
  90
  91                 case 'D':                               /* Ball + button data */
  92                         if (spaceorb->idx != 12) return;
  93                         for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
  94                         axes[0] = ( data[2]      << 3) | (data[ 3] >> 4);
  95                         axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
  96                         axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
  97                         axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
  98                         axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
  99                         axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
 100                         for (i = 0; i < 6; i++)
 101                                 input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
 102                         for (i = 0; i < 6; i++)
 103                                 input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
 104                         break;
 105
 106                 case 'K':                               /* Button data */
 107                         if (spaceorb->idx != 5) return;
 108                         for (i = 0; i < 6; i++)
 109                                 input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
 110
 111                         break;
 112
 113                 case 'E':                               /* Error packet */
 114                         if (spaceorb->idx != 4) return;
 115                         printk(KERN_ERR "spaceorb: Device error. [ ");
 116                         for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
 117                         printk("]\n");
 118                         break;
 119         }
 120
 121         input_sync(dev);
 122 }
 123
 124 static irqreturn_t spaceorb_interrupt(struct serio *serio,
 125                 unsigned char data, unsigned int flags)
 126 {
 127         struct spaceorb* spaceorb = serio_get_drvdata(serio);
 128
 129         if (~data & 0x80) {
 130                 if (spaceorb->idx) spaceorb_process_packet(spaceorb);
 131                 spaceorb->idx = 0;
 132         }
 133         if (spaceorb->idx < SPACEORB_MAX_LENGTH)
 134                 spaceorb->data[spaceorb->idx++] = data & 0x7f;
 135         return IRQ_HANDLED;
 136 }
 137
 138 /*
 139  * spaceorb_disconnect() is the opposite of spaceorb_connect()
 140  */
 141
 142 static void spaceorb_disconnect(struct serio *serio)
 143 {
 144         struct spaceorb* spaceorb = serio_get_drvdata(serio);
 145
 146         serio_close(serio);
 147         serio_set_drvdata(serio, NULL);
 148         input_unregister_device(spaceorb->dev);
 149         kfree(spaceorb);
 150 }
 151
 152 /*
 153  * spaceorb_connect() is the routine that is called when someone adds a
 154  * new serio device that supports SpaceOrb/Avenger protocol and registers
 155  * it as an input device.
 156  */
 157
 158 static int spaceorb_connect(struct serio *serio, struct serio_driver *drv)
 159 {
 160         struct spaceorb *spaceorb;
 161         struct input_dev *input_dev;
 162         int err = -ENOMEM;
 163         int i;
 164
 165         spaceorb = kzalloc(sizeof(struct spaceorb), GFP_KERNEL);
 166         input_dev = input_allocate_device();
 167         if (!spaceorb || !input_dev)
 168                 goto fail1;
 169
 170         spaceorb->dev = input_dev;
 171         snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
 172
 173         input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
 174         input_dev->phys = spaceorb->phys;
 175         input_dev->id.bustype = BUS_RS232;
 176         input_dev->id.vendor = SERIO_SPACEORB;
 177         input_dev->id.product = 0x0001;
 178         input_dev->id.version = 0x0100;
 179         input_dev->dev.parent = &serio->dev;
 180
 181         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 182
 183         for (i = 0; i < 6; i++)
 184                 set_bit(spaceorb_buttons[i], input_dev->keybit);
 185
 186         for (i = 0; i < 6; i++)
 187                 input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);
 188
 189         serio_set_drvdata(serio, spaceorb);
 190
 191         err = serio_open(serio, drv);
 192         if (err)
 193                 goto fail2;
 194
 195         err = input_register_device(spaceorb->dev);
 196         if (err)
 197                 goto fail3;
 198
 199         return 0;
 200
 201  fail3: serio_close(serio);
 202  fail2: serio_set_drvdata(serio, NULL);
 203  fail1: input_free_device(input_dev);
 204         kfree(spaceorb);
 205         return err;
 206 }
 207
 208 /*
 209  * The serio driver structure.
 210  */
 211
 212 static const struct serio_device_id spaceorb_serio_ids[] = {
 213         {
 214                 .type   = SERIO_RS232,
 215                 .proto  = SERIO_SPACEORB,
 216                 .id     = SERIO_ANY,
 217                 .extra  = SERIO_ANY,
 218         },
 219         { 0 }
 220 };
 221
 222 MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);
 223
 224 static struct serio_driver spaceorb_drv = {
 225         .driver         = {
 226                 .name   = "spaceorb",
 227         },
 228         .description    = DRIVER_DESC,
 229         .id_table       = spaceorb_serio_ids,
 230         .interrupt      = spaceorb_interrupt,
 231         .connect        = spaceorb_connect,
 232         .disconnect     = spaceorb_disconnect,
 233 };
 234
 235 module_serio_driver(spaceorb_drv);