drivers/input/joystick/gf2k.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 1998-2001 Vojtech Pavlik
   4  */
   5
   6 /*
   7  * Genius Flight 2000 joystick driver for Linux
   8  */
   9
  10 #include <linux/delay.h>
  11 #include <linux/kernel.h>
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/input.h>
  15 #include <linux/gameport.h>
  16 #include <linux/jiffies.h>
  17
  18 #define DRIVER_DESC     "Genius Flight 2000 joystick driver"
  19
  20 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  21 MODULE_DESCRIPTION(DRIVER_DESC);
  22 MODULE_LICENSE("GPL");
  23
  24 #define GF2K_START              400     /* The time we wait for the first bit [400 us] */
  25 #define GF2K_STROBE             40      /* The time we wait for the first bit [40 us] */
  26 #define GF2K_TIMEOUT            4       /* Wait for everything to settle [4 ms] */
  27 #define GF2K_LENGTH             80      /* Max number of triplets in a packet */
  28
  29 /*
  30  * Genius joystick ids ...
  31  */
  32
  33 #define GF2K_ID_G09             1
  34 #define GF2K_ID_F30D            2
  35 #define GF2K_ID_F30             3
  36 #define GF2K_ID_F31D            4
  37 #define GF2K_ID_F305            5
  38 #define GF2K_ID_F23P            6
  39 #define GF2K_ID_F31             7
  40 #define GF2K_ID_MAX             7
  41
  42 static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
  43 static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  44
  45 static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
  46                                 "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
  47 static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
  48 static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
  49 static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
  50 static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
  51 static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
  52
  53 static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
  54 static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
  55 static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };
  56
  57
  58 static short gf2k_seq_reset[] = { 240, 340, 0 };
  59 static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
  60
  61 struct gf2k {
  62         struct gameport *gameport;
  63         struct input_dev *dev;
  64         int reads;
  65         int bads;
  66         unsigned char id;
  67         unsigned char length;
  68         char phys[32];
  69 };
  70
  71 /*
  72  * gf2k_read_packet() reads a Genius Flight2000 packet.
  73  */
  74
  75 static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
  76 {
  77         unsigned char u, v;
  78         int i;
  79         unsigned int t, p;
  80         unsigned long flags;
  81
  82         t = gameport_time(gameport, GF2K_START);
  83         p = gameport_time(gameport, GF2K_STROBE);
  84
  85         i = 0;
  86
  87         local_irq_save(flags);
  88
  89         gameport_trigger(gameport);
  90         v = gameport_read(gameport);
  91
  92         while (t > 0 && i < length) {
  93                 t--; u = v;
  94                 v = gameport_read(gameport);
  95                 if (v & ~u & 0x10) {
  96                         data[i++] = v >> 5;
  97                         t = p;
  98                 }
  99         }
 100
 101         local_irq_restore(flags);
 102
 103         return i;
 104 }
 105
 106 /*
 107  * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
 108  * into digital mode.
 109  */
 110
 111 static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
 112 {
 113
 114         unsigned long flags;
 115         int i, t;
 116
 117         local_irq_save(flags);
 118
 119         i = 0;
 120         do {
 121                 gameport_trigger(gameport);
 122                 t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
 123                 while ((gameport_read(gameport) & 1) && t) t--;
 124                 udelay(seq[i]);
 125         } while (seq[++i]);
 126
 127         gameport_trigger(gameport);
 128
 129         local_irq_restore(flags);
 130 }
 131
 132 /*
 133  * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
 134  * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
 135  * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
 136  * is number of bits per triplet.
 137  */
 138
 139 #define GB(p,n,s)       gf2k_get_bits(data, p, n, s)
 140
 141 static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
 142 {
 143         __u64 data = 0;
 144         int i;
 145
 146         for (i = 0; i < num / 3 + 2; i++)
 147                 data |= buf[pos / 3 + i] << (i * 3);
 148         data >>= pos % 3;
 149         data &= (1 << num) - 1;
 150         data <<= shift;
 151
 152         return data;
 153 }
 154
 155 static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
 156 {
 157         struct input_dev *dev = gf2k->dev;
 158         int i, t;
 159
 160         for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
 161                 input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
 162
 163         for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
 164                 input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
 165
 166         t = GB(40,4,0);
 167
 168         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 169                 input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
 170
 171         t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
 172
 173         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 174                 input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
 175
 176         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 177                 input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
 178
 179         input_sync(dev);
 180 }
 181
 182 /*
 183  * gf2k_poll() reads and analyzes Genius joystick data.
 184  */
 185
 186 static void gf2k_poll(struct gameport *gameport)
 187 {
 188         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 189         unsigned char data[GF2K_LENGTH];
 190
 191         gf2k->reads++;
 192
 193         if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
 194                 gf2k->bads++;
 195         else
 196                 gf2k_read(gf2k, data);
 197 }
 198
 199 static int gf2k_open(struct input_dev *dev)
 200 {
 201         struct gf2k *gf2k = input_get_drvdata(dev);
 202
 203         gameport_start_polling(gf2k->gameport);
 204         return 0;
 205 }
 206
 207 static void gf2k_close(struct input_dev *dev)
 208 {
 209         struct gf2k *gf2k = input_get_drvdata(dev);
 210
 211         gameport_stop_polling(gf2k->gameport);
 212 }
 213
 214 /*
 215  * gf2k_connect() probes for Genius id joysticks.
 216  */
 217
 218 static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
 219 {
 220         struct gf2k *gf2k;
 221         struct input_dev *input_dev;
 222         unsigned char data[GF2K_LENGTH];
 223         int i, err;
 224
 225         gf2k = kzalloc(sizeof(*gf2k), GFP_KERNEL);
 226         input_dev = input_allocate_device();
 227         if (!gf2k || !input_dev) {
 228                 err = -ENOMEM;
 229                 goto fail1;
 230         }
 231
 232         gf2k->gameport = gameport;
 233         gf2k->dev = input_dev;
 234
 235         gameport_set_drvdata(gameport, gf2k);
 236
 237         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 238         if (err)
 239                 goto fail1;
 240
 241         gf2k_trigger_seq(gameport, gf2k_seq_reset);
 242
 243         msleep(GF2K_TIMEOUT);
 244
 245         gf2k_trigger_seq(gameport, gf2k_seq_digital);
 246
 247         msleep(GF2K_TIMEOUT);
 248
 249         if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
 250                 err = -ENODEV;
 251                 goto fail2;
 252         }
 253
 254         if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
 255                 err = -ENODEV;
 256                 goto fail2;
 257         }
 258
 259 #ifdef RESET_WORKS
 260         if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
 261             (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
 262                 err = -ENODEV;
 263                 goto fail2;
 264         }
 265 #else
 266         gf2k->id = 6;
 267 #endif
 268
 269         if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
 270                 printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
 271                         gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
 272                 err = -ENODEV;
 273                 goto fail2;
 274         }
 275
 276         gameport_set_poll_handler(gameport, gf2k_poll);
 277         gameport_set_poll_interval(gameport, 20);
 278
 279         snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
 280
 281         gf2k->length = gf2k_lens[gf2k->id];
 282
 283         input_dev->name = gf2k_names[gf2k->id];
 284         input_dev->phys = gf2k->phys;
 285         input_dev->id.bustype = BUS_GAMEPORT;
 286         input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
 287         input_dev->id.product = gf2k->id;
 288         input_dev->id.version = 0x0100;
 289         input_dev->dev.parent = &gameport->dev;
 290
 291         input_set_drvdata(input_dev, gf2k);
 292
 293         input_dev->open = gf2k_open;
 294         input_dev->close = gf2k_close;
 295
 296         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 297
 298         for (i = 0; i < gf2k_axes[gf2k->id]; i++)
 299                 set_bit(gf2k_abs[i], input_dev->absbit);
 300
 301         for (i = 0; i < gf2k_hats[gf2k->id]; i++)
 302                 input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
 303
 304         for (i = 0; i < gf2k_joys[gf2k->id]; i++)
 305                 set_bit(gf2k_btn_joy[i], input_dev->keybit);
 306
 307         for (i = 0; i < gf2k_pads[gf2k->id]; i++)
 308                 set_bit(gf2k_btn_pad[i], input_dev->keybit);
 309
 310         gf2k_read_packet(gameport, gf2k->length, data);
 311         gf2k_read(gf2k, data);
 312
 313         for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
 314                 int max = i < 2 ?
 315                         input_abs_get_val(input_dev, gf2k_abs[i]) * 2 :
 316                         input_abs_get_val(input_dev, gf2k_abs[0]) +
 317                                 input_abs_get_val(input_dev, gf2k_abs[1]);
 318                 int flat = i < 2 ? 24 : 0;
 319
 320                 input_set_abs_params(input_dev, gf2k_abs[i],
 321                                      32, max - 32, 8, flat);
 322         }
 323
 324         err = input_register_device(gf2k->dev);
 325         if (err)
 326                 goto fail2;
 327
 328         return 0;
 329
 330  fail2: gameport_close(gameport);
 331  fail1: gameport_set_drvdata(gameport, NULL);
 332         input_free_device(input_dev);
 333         kfree(gf2k);
 334         return err;
 335 }
 336
 337 static void gf2k_disconnect(struct gameport *gameport)
 338 {
 339         struct gf2k *gf2k = gameport_get_drvdata(gameport);
 340
 341         input_unregister_device(gf2k->dev);
 342         gameport_close(gameport);
 343         gameport_set_drvdata(gameport, NULL);
 344         kfree(gf2k);
 345 }
 346
 347 static struct gameport_driver gf2k_drv = {
 348         .driver         = {
 349                 .name   = "gf2k",
 350         },
 351         .description    = DRIVER_DESC,
 352         .connect        = gf2k_connect,
 353         .disconnect     = gf2k_disconnect,
 354 };
 355
 356 module_gameport_driver(gf2k_drv);