drivers/char/joystick/joy-thrustmaster.c

   1 /*
   2  *  joy-thrustmaster.c  Version 1.2
   3  *
   4  *  Copyright (c) 1998-1999 Vojtech Pavlik
   5  *
   6  *  Sponsored by SuSE
   7  */
   8
   9 /*
  10  * This is a module for the Linux joystick driver, supporting
  11  * ThrustMaster DirectConnect (BSP) joystick family.
  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@suse.cz>, or by paper mail:
  31  * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
  32  */
  33
  34 #include <asm/io.h>
  35 #include <asm/system.h>
  36 #include <linux/delay.h>
  37 #include <linux/errno.h>
  38 #include <linux/ioport.h>
  39 #include <linux/joystick.h>
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/string.h>
  43 #include <linux/init.h>
  44
  45 #define JS_TM_MAX_START         400
  46 #define JS_TM_MAX_STROBE        45
  47 #define JS_TM_MAX_LENGTH        13
  48
  49 #define JS_TM_MODE_M3DI         1
  50 #define JS_TM_MODE_3DRP         3
  51 #define JS_TM_MODE_FGP          163
  52
  53 #define JS_TM_BYTE_ID           10
  54 #define JS_TM_BYTE_REV          11
  55 #define JS_TM_BYTE_DEF          12
  56
  57 static int js_tm_port_list[] __initdata = {0x201, 0};
  58 static struct js_port* js_tm_port __initdata = NULL;
  59
  60 static unsigned char js_tm_byte_a[16] = { 0, 1, 3, 4, 6, 7 };
  61 static unsigned char js_tm_byte_d[16] = { 2, 5, 8, 9 };
  62
  63 struct js_tm_info {
  64         int io;
  65         unsigned char mode;
  66 };
  67
  68 /*
  69  * js_tm_read_packet() reads a ThrustMaster packet.
  70  */
  71
  72 static int js_tm_read_packet(int io, unsigned char *data)
  73 {
  74         unsigned int t, p;
  75         unsigned char u, v, error;
  76         int i, j;
  77         unsigned long flags;
  78
  79         error = 0;
  80         i = j = 0;
  81         p = t = JS_TM_MAX_START;
  82
  83         __save_flags(flags);
  84         __cli();
  85         outb(0xff,io);
  86
  87         v = inb(io) >> 4;
  88
  89         do {
  90                 t--;
  91                 u = v; v = inb(io) >> 4;
  92                 if (~v & u & 2) {
  93                         if (j) {
  94                                 if (j < 9) {                            /* Data bit */
  95                                         data[i] |= (~v & 1) << (j - 1);
  96                                         j++;
  97                                 } else {                                /* Stop bit */
  98                                         error |= v & 1;
  99                                         j = 0;
 100                                         i++;
 101                                 }
 102                         } else {                                        /* Start bit */
 103                                 data[i] = 0;
 104                                 error |= ~v & 1;
 105                                 j++;
 106                         }
 107                         p = t = (p - t) << 1;
 108                 }
 109         } while (!error && i < JS_TM_MAX_LENGTH && t > 0);
 110
 111         __restore_flags(flags);
 112
 113         return -(i != JS_TM_MAX_LENGTH);
 114 }
 115
 116 /*
 117  * js_tm_read() reads and analyzes ThrustMaster joystick data.
 118  */
 119
 120 static int js_tm_read(void *xinfo, int **axes, int **buttons)
 121 {
 122         struct js_tm_info *info = xinfo;
 123         unsigned char data[JS_TM_MAX_LENGTH];
 124         int i;
 125
 126         if (js_tm_read_packet(info->io, data)) return -1;
 127         if (data[JS_TM_BYTE_ID] != info->mode) return -1;
 128
 129         for (i = 0; i < data[JS_TM_BYTE_DEF] >> 4; i++) axes[0][i] = data[js_tm_byte_a[i]];
 130
 131         switch (info->mode) {
 132
 133                 case JS_TM_MODE_M3DI:
 134
 135                         axes[0][4] = ((data[js_tm_byte_d[0]] >> 3) & 1) - ((data[js_tm_byte_d[0]] >> 1) & 1);
 136                         axes[0][5] = ((data[js_tm_byte_d[0]] >> 2) & 1) - ( data[js_tm_byte_d[0]]       & 1);
 137
 138                         buttons[0][0] = ((data[js_tm_byte_d[0]] >> 6) & 0x01) | ((data[js_tm_byte_d[0]] >> 3) & 0x06)
 139                                       | ((data[js_tm_byte_d[0]] >> 4) & 0x08) | ((data[js_tm_byte_d[1]] >> 2) & 0x30);
 140
 141                         return 0;
 142
 143                 case JS_TM_MODE_3DRP:
 144                 case JS_TM_MODE_FGP:
 145
 146                         buttons[0][0] = (data[js_tm_byte_d[0]] & 0x3f) | ((data[js_tm_byte_d[1]] << 6) & 0xc0)
 147                                       | (( ((int) data[js_tm_byte_d[0]]) << 2) & 0x300);
 148
 149                         return 0;
 150
 151                 default:
 152
 153                         buttons[0][0] = 0;
 154
 155                         for (i = 0; i < (data[JS_TM_BYTE_DEF] & 0xf); i++)
 156                                 buttons[0][0] |= ((int) data[js_tm_byte_d[i]]) << (i << 3);
 157
 158                         return 0;
 159
 160         }
 161
 162         return -1;
 163 }
 164
 165 /*
 166  * js_tm_init_corr() initializes the correction values for
 167  * ThrustMaster joysticks.
 168  */
 169
 170 static void __init js_tm_init_corr(int num_axes, int mode, int **axes, struct js_corr **corr)
 171 {
 172         int j = 0;
 173
 174         for (; j < num_axes; j++) {
 175                 corr[0][j].type = JS_CORR_BROKEN;
 176                 corr[0][j].prec = 0;
 177                 corr[0][j].coef[0] = 127 - 2;
 178                 corr[0][j].coef[1] = 128 + 2;
 179                 corr[0][j].coef[2] = (1 << 29) / (127 - 4);
 180                 corr[0][j].coef[3] = (1 << 29) / (127 - 4);
 181         }
 182
 183         switch (mode) {
 184                 case JS_TM_MODE_M3DI: j = 4; break;
 185                 default: break;
 186         }
 187
 188         for (; j < num_axes; j++) {
 189                 corr[0][j].type = JS_CORR_BROKEN;
 190                 corr[0][j].prec = 0;
 191                 corr[0][j].coef[0] = 0;
 192                 corr[0][j].coef[1] = 0;
 193                 corr[0][j].coef[2] = (1 << 29);
 194                 corr[0][j].coef[3] = (1 << 29);
 195         }
 196
 197 }
 198
 199 /*
 200  * js_tm_probe() probes for ThrustMaster type joysticks.
 201  */
 202
 203 static struct js_port __init *js_tm_probe(int io, struct js_port *port)
 204 {
 205         struct js_tm_info info;
 206         struct js_rm_models {
 207                 unsigned char id;
 208                 char *name;
 209                 char axes;
 210                 char buttons;
 211         } models[] = {  {   1, "ThrustMaster Millenium 3D Inceptor", 6, 6 },
 212                         {   3, "ThrustMaster Rage 3D Gamepad", 2, 10 },
 213                         { 163, "Thrustmaster Fusion GamePad", 2, 10 },
 214                         {   0, NULL, 0, 0 }};
 215         char name[64];
 216         unsigned char data[JS_TM_MAX_LENGTH];
 217         unsigned char a, b;
 218         int i;
 219
 220         if (check_region(io, 1)) return port;
 221
 222         if (js_tm_read_packet(io, data)) return port;
 223
 224         info.io = io;
 225         info.mode = data[JS_TM_BYTE_ID];
 226
 227         if (!info.mode) return port;
 228
 229         for (i = 0; models[i].id && models[i].id != info.mode; i++);
 230
 231         if (models[i].id != info.mode) {
 232                 a = data[JS_TM_BYTE_DEF] >> 4;
 233                 b = (data[JS_TM_BYTE_DEF] & 0xf) << 3;
 234                 sprintf(name, "Unknown %d-axis, %d-button TM device %d", a, b, info.mode);
 235         } else {
 236                 sprintf(name, models[i].name);
 237                 a = models[i].axes;
 238                 b = models[i].buttons;
 239         }
 240
 241         request_region(io, 1, "joystick (thrustmaster)");
 242         port = js_register_port(port, &info, 1, sizeof(struct js_tm_info), js_tm_read);
 243         printk(KERN_INFO "js%d: %s revision %d at %#x\n",
 244                 js_register_device(port, 0, a, b, name, THIS_MODULE, NULL, NULL), name, data[JS_TM_BYTE_REV], io);
 245         js_tm_init_corr(a, info.mode, port->axes, port->corr);
 246
 247         return port;
 248 }
 249
 250 #ifdef MODULE
 251 int init_module(void)
 252 #else
 253 int __init js_tm_init(void)
 254 #endif
 255 {
 256         int *p;
 257
 258         for (p = js_tm_port_list; *p; p++) js_tm_port = js_tm_probe(*p, js_tm_port);
 259         if (js_tm_port) return 0;
 260
 261 #ifdef MODULE
 262         printk(KERN_WARNING "joy-thrustmaster: no joysticks found\n");
 263 #endif
 264
 265         return -ENODEV;
 266 }
 267
 268 #ifdef MODULE
 269 void cleanup_module(void)
 270 {
 271         struct js_tm_info *info;
 272
 273         while (js_tm_port) {
 274                 js_unregister_device(js_tm_port->devs[0]);
 275                 info = js_tm_port->info;
 276                 release_region(info->io, 1);
 277                 js_tm_port = js_unregister_port(js_tm_port);
 278         }
 279 }
 280 #endif