drivers/input/joystick/spaceorb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 1999-2001 Vojtech Pavlik
   4  *
   5  *  Based on the work of:
   6  *      David Thompson
   7  */
   8
   9 /*
  10  * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
  11  */
  12
  13 /*
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/module.h>
  19 #include <linux/input.h>
  20 #include <linux/serio.h>
  21
  22 #define DRIVER_DESC     "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
  23
  24 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  25 MODULE_DESCRIPTION(DRIVER_DESC);
  26 MODULE_LICENSE("GPL");
  27
  28 /*
  29  * Constants.
  30  */
  31
  32 #define SPACEORB_MAX_LENGTH     64
  33
  34 static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
  35 static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
  36
  37 /*
  38  * Per-Orb data.
  39  */
  40
  41 struct spaceorb {
  42         struct input_dev *dev;
  43         int idx;
  44         unsigned char data[SPACEORB_MAX_LENGTH];
  45         char phys[32];
  46 };
  47
  48 static unsigned char spaceorb_xor[] = "SpaceWare";
  49
  50 static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
  51                 "Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
  52
  53 /*
  54  * spaceorb_process_packet() decodes packets the driver receives from the
  55  * SpaceOrb.
  56  */
  57
  58 static void spaceorb_process_packet(struct spaceorb *spaceorb)
  59 {
  60         struct input_dev *dev = spaceorb->dev;
  61         unsigned char *data = spaceorb->data;
  62         unsigned char c = 0;
  63         int axes[6];
  64         int i;
  65
  66         if (spaceorb->idx < 2) return;
  67         for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
  68         if (c) return;
  69
  70         switch (data[0]) {
  71
  72                 case 'R':                               /* Reset packet */
  73                         spaceorb->data[spaceorb->idx - 1] = 0;
  74                         for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
  75                         printk(KERN_INFO "input: %s [%s] is %s\n",
  76                                  dev->name, spaceorb->data + i, spaceorb->phys);
  77                         break;
  78
  79                 case 'D':                               /* Ball + button data */
  80                         if (spaceorb->idx != 12) return;
  81                         for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
  82                         axes[0] = ( data[2]      << 3) | (data[ 3] >> 4);
  83                         axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
  84                         axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
  85                         axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
  86                         axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
  87                         axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
  88                         for (i = 0; i < 6; i++)
  89                                 input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
  90                         for (i = 0; i < 6; i++)
  91                                 input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
  92                         break;
  93
  94                 case 'K':                               /* Button data */
  95                         if (spaceorb->idx != 5) return;
  96                         for (i = 0; i < 6; i++)
  97                                 input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
  98
  99                         break;
 100
 101                 case 'E':                               /* Error packet */
 102                         if (spaceorb->idx != 4) return;
 103                         printk(KERN_ERR "spaceorb: Device error. [ ");
 104                         for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
 105                         printk("]\n");
 106                         break;
 107         }
 108
 109         input_sync(dev);
 110 }
 111
 112 static irqreturn_t spaceorb_interrupt(struct serio *serio,
 113                 unsigned char data, unsigned int flags)
 114 {
 115         struct spaceorb* spaceorb = serio_get_drvdata(serio);
 116
 117         if (~data & 0x80) {
 118                 if (spaceorb->idx) spaceorb_process_packet(spaceorb);
 119                 spaceorb->idx = 0;
 120         }
 121         if (spaceorb->idx < SPACEORB_MAX_LENGTH)
 122                 spaceorb->data[spaceorb->idx++] = data & 0x7f;
 123         return IRQ_HANDLED;
 124 }
 125
 126 /*
 127  * spaceorb_disconnect() is the opposite of spaceorb_connect()
 128  */
 129
 130 static void spaceorb_disconnect(struct serio *serio)
 131 {
 132         struct spaceorb* spaceorb = serio_get_drvdata(serio);
 133
 134         serio_close(serio);
 135         serio_set_drvdata(serio, NULL);
 136         input_unregister_device(spaceorb->dev);
 137         kfree(spaceorb);
 138 }
 139
 140 /*
 141  * spaceorb_connect() is the routine that is called when someone adds a
 142  * new serio device that supports SpaceOrb/Avenger protocol and registers
 143  * it as an input device.
 144  */
 145
 146 static int spaceorb_connect(struct serio *serio, struct serio_driver *drv)
 147 {
 148         struct spaceorb *spaceorb;
 149         struct input_dev *input_dev;
 150         int err = -ENOMEM;
 151         int i;
 152
 153         spaceorb = kzalloc(sizeof(struct spaceorb), GFP_KERNEL);
 154         input_dev = input_allocate_device();
 155         if (!spaceorb || !input_dev)
 156                 goto fail1;
 157
 158         spaceorb->dev = input_dev;
 159         snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
 160
 161         input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
 162         input_dev->phys = spaceorb->phys;
 163         input_dev->id.bustype = BUS_RS232;
 164         input_dev->id.vendor = SERIO_SPACEORB;
 165         input_dev->id.product = 0x0001;
 166         input_dev->id.version = 0x0100;
 167         input_dev->dev.parent = &serio->dev;
 168
 169         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 170
 171         for (i = 0; i < 6; i++)
 172                 set_bit(spaceorb_buttons[i], input_dev->keybit);
 173
 174         for (i = 0; i < 6; i++)
 175                 input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);
 176
 177         serio_set_drvdata(serio, spaceorb);
 178
 179         err = serio_open(serio, drv);
 180         if (err)
 181                 goto fail2;
 182
 183         err = input_register_device(spaceorb->dev);
 184         if (err)
 185                 goto fail3;
 186
 187         return 0;
 188
 189  fail3: serio_close(serio);
 190  fail2: serio_set_drvdata(serio, NULL);
 191  fail1: input_free_device(input_dev);
 192         kfree(spaceorb);
 193         return err;
 194 }
 195
 196 /*
 197  * The serio driver structure.
 198  */
 199
 200 static const struct serio_device_id spaceorb_serio_ids[] = {
 201         {
 202                 .type   = SERIO_RS232,
 203                 .proto  = SERIO_SPACEORB,
 204                 .id     = SERIO_ANY,
 205                 .extra  = SERIO_ANY,
 206         },
 207         { 0 }
 208 };
 209
 210 MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);
 211
 212 static struct serio_driver spaceorb_drv = {
 213         .driver         = {
 214                 .name   = "spaceorb",
 215         },
 216         .description    = DRIVER_DESC,
 217         .id_table       = spaceorb_serio_ids,
 218         .interrupt      = spaceorb_interrupt,
 219         .connect        = spaceorb_connect,
 220         .disconnect     = spaceorb_disconnect,
 221 };
 222
 223 module_serio_driver(spaceorb_drv);