| 1 | /* Portions of this file were derived from the following files: |
| 2 | * |
| 3 | ********************************************************************** |
| 4 | * |
| 5 | * Xserver/hw/kdrive/linux/ps2.c |
| 6 | * |
| 7 | * Copyright (c) 1999 by Keith Packard |
| 8 | * |
| 9 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 10 | * documentation for any purpose is hereby granted without fee, provided that |
| 11 | * the above copyright notice appear in all copies and that both that |
| 12 | * copyright notice and this permission notice appear in supporting |
| 13 | * documentation, and that the name of Keith Packard not be used in |
| 14 | * advertising or publicity pertaining to distribution of the software without |
| 15 | * specific, written prior permission. Keith Packard makes no |
| 16 | * representations about the suitability of this software for any purpose. It |
| 17 | * is provided "as is" without express or implied warranty. |
| 18 | * |
| 19 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 20 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 21 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 22 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 23 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 24 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 25 | * PERFORMANCE OF THIS SOFTWARE. |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * Copyright 2001,2003 Red Hat Inc., Durham, North Carolina. |
| 31 | * |
| 32 | * All Rights Reserved. |
| 33 | * |
| 34 | * Permission is hereby granted, free of charge, to any person obtaining |
| 35 | * a copy of this software and associated documentation files (the |
| 36 | * "Software"), to deal in the Software without restriction, including |
| 37 | * without limitation on the rights to use, copy, modify, merge, |
| 38 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 39 | * and to permit persons to whom the Software is furnished to do so, |
| 40 | * subject to the following conditions: |
| 41 | * |
| 42 | * The above copyright notice and this permission notice (including the |
| 43 | * next paragraph) shall be included in all copies or substantial |
| 44 | * portions of the Software. |
| 45 | * |
| 46 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 47 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 48 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 49 | * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS |
| 50 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 51 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 52 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 53 | * SOFTWARE. |
| 54 | */ |
| 55 | |
| 56 | /* |
| 57 | * Authors: |
| 58 | * Rickard E. (Rik) Faith <faith@redhat.com> |
| 59 | * |
| 60 | */ |
| 61 | |
| 62 | /** \file |
| 63 | * |
| 64 | * This code implements a low-level device driver for a serial MS mouse. |
| 65 | * The code is derived from code by Keith Packard (see the source code |
| 66 | * for complete references). */ |
| 67 | |
| 68 | #ifdef HAVE_DMX_CONFIG_H |
| 69 | #include <dmx-config.h> |
| 70 | #endif |
| 71 | |
| 72 | #include "inputstr.h" |
| 73 | #include <X11/Xos.h> |
| 74 | #include <errno.h> |
| 75 | #include <termios.h> |
| 76 | |
| 77 | /*****************************************************************************/ |
| 78 | /* Define some macros to make it easier to move this file to another |
| 79 | * part of the Xserver tree. All calls to the dmx* layer are #defined |
| 80 | * here for the .c file. The .h file will also have to be edited. */ |
| 81 | #include "dmxinputinit.h" |
| 82 | #include "lnx-ps2.h" |
| 83 | |
| 84 | #define GETPRIV myPrivate *priv \ |
| 85 | = ((DMXLocalInputInfoPtr)(pDev->devicePrivate))->private |
| 86 | |
| 87 | #define LOG0(f) dmxLog(dmxDebug,f) |
| 88 | #define LOG1(f,a) dmxLog(dmxDebug,f,a) |
| 89 | #define LOG2(f,a,b) dmxLog(dmxDebug,f,a,b) |
| 90 | #define LOG3(f,a,b,c) dmxLog(dmxDebug,f,a,b,c) |
| 91 | #define FATAL0(f) dmxLog(dmxFatal,f) |
| 92 | #define FATAL1(f,a) dmxLog(dmxFatal,f,a) |
| 93 | #define FATAL2(f,a,b) dmxLog(dmxFatal,f,a,b) |
| 94 | #define MOTIONPROC dmxMotionProcPtr |
| 95 | #define ENQUEUEPROC dmxEnqueueProcPtr |
| 96 | #define CHECKPROC dmxCheckSpecialProcPtr |
| 97 | #define BLOCK DMXBlockType |
| 98 | |
| 99 | /* End of interface definitions. */ |
| 100 | /*****************************************************************************/ |
| 101 | |
| 102 | /* Private area for PS/2 devices. */ |
| 103 | typedef struct _myPrivate { |
| 104 | DeviceIntPtr pMouse; |
| 105 | int fd; |
| 106 | enum { |
| 107 | button1 = 0x0001, |
| 108 | button2 = 0x0002, |
| 109 | button3 = 0x0004, |
| 110 | button4 = 0x0008, |
| 111 | button5 = 0x0010 |
| 112 | } buttons; |
| 113 | } myPrivate; |
| 114 | |
| 115 | static int |
| 116 | ps2LinuxReadBytes(int fd, unsigned char *buf, int len, int min) |
| 117 | { |
| 118 | int n, tot; |
| 119 | fd_set set; |
| 120 | struct timeval tv; |
| 121 | |
| 122 | tot = 0; |
| 123 | while (len) { |
| 124 | n = read(fd, buf, len); |
| 125 | if (n > 0) { |
| 126 | tot += n; |
| 127 | buf += n; |
| 128 | len -= n; |
| 129 | } |
| 130 | if (tot % min == 0) |
| 131 | break; |
| 132 | FD_ZERO(&set); |
| 133 | FD_SET(fd, &set); |
| 134 | tv.tv_sec = 0; |
| 135 | tv.tv_usec = 100 * 1000; |
| 136 | n = select(fd + 1, &set, 0, 0, &tv); |
| 137 | if (n <= 0) |
| 138 | break; |
| 139 | } |
| 140 | return tot; |
| 141 | } |
| 142 | |
| 143 | static void |
| 144 | ps2LinuxButton(DevicePtr pDev, ENQUEUEPROC enqueue, int buttons, BLOCK block) |
| 145 | { |
| 146 | GETPRIV; |
| 147 | |
| 148 | #define PRESS(b) \ |
| 149 | do { \ |
| 150 | enqueue(pDev, ButtonPress, 0, 0, NULL, block); \ |
| 151 | } while (0) |
| 152 | |
| 153 | #define RELEASE(b) \ |
| 154 | do { \ |
| 155 | enqueue(pDev, ButtonRelease, 0, 0, NULL, block); \ |
| 156 | } while (0) |
| 157 | |
| 158 | if ((buttons & button1) && !(priv->buttons & button1)) |
| 159 | PRESS(1); |
| 160 | if (!(buttons & button1) && (priv->buttons & button1)) |
| 161 | RELEASE(1); |
| 162 | |
| 163 | if ((buttons & button2) && !(priv->buttons & button2)) |
| 164 | PRESS(2); |
| 165 | if (!(buttons & button2) && (priv->buttons & button2)) |
| 166 | RELEASE(2); |
| 167 | |
| 168 | if ((buttons & button3) && !(priv->buttons & button3)) |
| 169 | PRESS(3); |
| 170 | if (!(buttons & button3) && (priv->buttons & button3)) |
| 171 | RELEASE(3); |
| 172 | |
| 173 | if ((buttons & button4) && !(priv->buttons & button4)) |
| 174 | PRESS(4); |
| 175 | if (!(buttons & button4) && (priv->buttons & button4)) |
| 176 | RELEASE(4); |
| 177 | |
| 178 | if ((buttons & button5) && !(priv->buttons & button5)) |
| 179 | PRESS(5); |
| 180 | if (!(buttons & button5) && (priv->buttons & button5)) |
| 181 | RELEASE(5); |
| 182 | |
| 183 | priv->buttons = buttons; |
| 184 | } |
| 185 | |
| 186 | /** Read an event from the \a pDev device. If the event is a motion |
| 187 | * event, enqueue it with the \a motion function. Otherwise, check for |
| 188 | * special keys with the \a checkspecial function and enqueue the event |
| 189 | * with the \a enqueue function. The \a block type is passed to the |
| 190 | * functions so that they may block SIGIO handling as appropriate to the |
| 191 | * caller of this function. */ |
| 192 | void |
| 193 | ps2LinuxRead(DevicePtr pDev, MOTIONPROC motion, |
| 194 | ENQUEUEPROC enqueue, CHECKPROC checkspecial, BLOCK block) |
| 195 | { |
| 196 | GETPRIV; |
| 197 | unsigned char buf[3 * 200]; /* RATS: Use ok */ |
| 198 | unsigned char *b; |
| 199 | int n; |
| 200 | int dx, dy, v[2]; |
| 201 | |
| 202 | while ((n = ps2LinuxReadBytes(priv->fd, buf, sizeof(buf), 3)) > 0) { |
| 203 | b = buf; |
| 204 | while (n >= 3) { |
| 205 | dx = b[1] - ((b[0] & 0x10) ? 256 : 0); |
| 206 | dy = -b[2] + ((b[0] & 0x20) ? 256 : 0); |
| 207 | v[0] = -dx; |
| 208 | v[1] = -dy; |
| 209 | |
| 210 | motion(pDev, v, 0, 2, 1, block); |
| 211 | ps2LinuxButton(pDev, enqueue, (((b[0] & 4) ? button2 : 0) |
| 212 | | ((b[0] & 2) ? button3 : 0) |
| 213 | | ((b[0] & 1) ? button1 : 0)), |
| 214 | block); |
| 215 | n -= 3; |
| 216 | b += 3; |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /** Initialize \a pDev. */ |
| 222 | void |
| 223 | ps2LinuxInit(DevicePtr pDev) |
| 224 | { |
| 225 | GETPRIV; |
| 226 | const char *names[] = { "/dev/mouse", "/dev/psaux", NULL }; |
| 227 | int i; |
| 228 | |
| 229 | if (priv->fd >= 0) |
| 230 | return; |
| 231 | |
| 232 | for (i = 0; names[i]; i++) { |
| 233 | if ((priv->fd = open(names[i], O_RDWR | O_NONBLOCK, 0)) >= 0) |
| 234 | break; |
| 235 | } |
| 236 | if (priv->fd < 0) |
| 237 | FATAL1("ps2LinuxInit: Cannot open mouse port (%s)\n", strerror(errno)); |
| 238 | } |
| 239 | |
| 240 | /** Turn \a pDev on (i.e., take input from \a pDev). */ |
| 241 | int |
| 242 | ps2LinuxOn(DevicePtr pDev) |
| 243 | { |
| 244 | GETPRIV; |
| 245 | |
| 246 | if (priv->fd < 0) |
| 247 | ps2LinuxInit(pDev); |
| 248 | return priv->fd; |
| 249 | } |
| 250 | |
| 251 | /** Turn \a pDev off (i.e., stop taking input from \a pDev). */ |
| 252 | void |
| 253 | ps2LinuxOff(DevicePtr pDev) |
| 254 | { |
| 255 | GETPRIV; |
| 256 | |
| 257 | close(priv->fd); |
| 258 | priv->fd = -1; |
| 259 | } |
| 260 | |
| 261 | static void |
| 262 | ps2LinuxGetMap(DevicePtr pDev, unsigned char *map, int *nButtons) |
| 263 | { |
| 264 | int i; |
| 265 | |
| 266 | if (nButtons) |
| 267 | *nButtons = 3; |
| 268 | if (map) |
| 269 | for (i = 0; i <= *nButtons; i++) |
| 270 | map[i] = i; |
| 271 | } |
| 272 | |
| 273 | /** Currently unused hook called prior to an VT switch. */ |
| 274 | void |
| 275 | ps2LinuxVTPreSwitch(pointer p) |
| 276 | { |
| 277 | } |
| 278 | |
| 279 | /** Currently unused hook called after returning from a VT switch. */ |
| 280 | void |
| 281 | ps2LinuxVTPostSwitch(pointer p) |
| 282 | { |
| 283 | } |
| 284 | |
| 285 | /** Create a private structure for use within this file. */ |
| 286 | pointer |
| 287 | ps2LinuxCreatePrivate(DeviceIntPtr pMouse) |
| 288 | { |
| 289 | myPrivate *priv = calloc(1, sizeof(*priv)); |
| 290 | |
| 291 | priv->fd = -1; |
| 292 | priv->pMouse = pMouse; |
| 293 | return priv; |
| 294 | } |
| 295 | |
| 296 | /** Destroy a private structure. */ |
| 297 | void |
| 298 | ps2LinuxDestroyPrivate(pointer priv) |
| 299 | { |
| 300 | free(priv); |
| 301 | } |
| 302 | |
| 303 | /** Fill the \a info structure with information needed to initialize \a |
| 304 | * pDev. */ |
| 305 | void |
| 306 | ps2LinuxGetInfo(DevicePtr pDev, DMXLocalInitInfoPtr info) |
| 307 | { |
| 308 | info->buttonClass = 1; |
| 309 | ps2LinuxGetMap(pDev, info->map, &info->numButtons); |
| 310 | info->valuatorClass = 1; |
| 311 | info->numRelAxes = 2; |
| 312 | info->minval[0] = 0; |
| 313 | info->maxval[0] = 0; |
| 314 | info->res[0] = 1; |
| 315 | info->minres[0] = 0; |
| 316 | info->maxres[0] = 1; |
| 317 | info->ptrFeedbackClass = 1; |
| 318 | } |