| 1 | /* |
| 2 | * TSLIB based touchscreen driver for KDrive |
| 3 | * Porting to new input API and event queueing by Daniel Stone. |
| 4 | * Derived from ts.c by Keith Packard |
| 5 | * Derived from ps2.c by Jim Gettys |
| 6 | * |
| 7 | * Copyright © 1999 Keith Packard |
| 8 | * Copyright © 2000 Compaq Computer Corporation |
| 9 | * Copyright © 2002 MontaVista Software Inc. |
| 10 | * Copyright © 2005 OpenedHand Ltd. |
| 11 | * Copyright © 2006 Nokia Corporation |
| 12 | * |
| 13 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 14 | * documentation for any purpose is hereby granted without fee, provided that |
| 15 | * the above copyright notice appear in all copies and that both that |
| 16 | * copyright notice and this permission notice appear in supporting |
| 17 | * documentation, and that the name of the authors and/or copyright holders |
| 18 | * not be used in advertising or publicity pertaining to distribution of the |
| 19 | * software without specific, written prior permission. The authors and/or |
| 20 | * copyright holders make no representations about the suitability of this |
| 21 | * software for any purpose. It is provided "as is" without express or |
| 22 | * implied warranty. |
| 23 | * |
| 24 | * THE AUTHORS AND/OR COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD |
| 25 | * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
| 26 | * AND FITNESS, IN NO EVENT SHALL THE AUTHORS AND/OR COPYRIGHT HOLDERS BE |
| 27 | * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 28 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 30 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #ifdef HAVE_KDRIVE_CONFIG_H |
| 34 | #include <kdrive-config.h> |
| 35 | #endif |
| 36 | |
| 37 | #include <X11/X.h> |
| 38 | #include <X11/Xproto.h> |
| 39 | #include <X11/Xpoll.h> |
| 40 | #include "inputstr.h" |
| 41 | #include "scrnintstr.h" |
| 42 | #include "kdrive.h" |
| 43 | #include <sys/ioctl.h> |
| 44 | #include <tslib.h> |
| 45 | #include <dirent.h> |
| 46 | #include <linux/input.h> |
| 47 | |
| 48 | struct TslibPrivate { |
| 49 | int fd; |
| 50 | int lastx, lasty; |
| 51 | struct tsdev *tsDev; |
| 52 | void (*raw_event_hook) (int x, int y, int pressure, void *closure); |
| 53 | void *raw_event_closure; |
| 54 | int phys_screen; |
| 55 | }; |
| 56 | |
| 57 | static void |
| 58 | TsRead(int fd, void *closure) |
| 59 | { |
| 60 | KdPointerInfo *pi = closure; |
| 61 | struct TslibPrivate *private = pi->driverPrivate; |
| 62 | struct ts_sample event; |
| 63 | long x = 0, y = 0; |
| 64 | unsigned long flags; |
| 65 | |
| 66 | if (private->raw_event_hook) { |
| 67 | while (ts_read_raw(private->tsDev, &event, 1) == 1) |
| 68 | private->raw_event_hook(event.x, event.y, event.pressure, |
| 69 | private->raw_event_closure); |
| 70 | return; |
| 71 | } |
| 72 | |
| 73 | while (ts_read(private->tsDev, &event, 1) == 1) { |
| 74 | if (event.pressure) { |
| 75 | flags = KD_BUTTON_1; |
| 76 | |
| 77 | /* |
| 78 | * Here we test for the touch screen driver actually being on the |
| 79 | * touch screen, if it is we send absolute coordinates. If not, |
| 80 | * then we send delta's so that we can track the entire vga screen. |
| 81 | */ |
| 82 | if (KdCurScreen == private->phys_screen) { |
| 83 | x = event.x; |
| 84 | y = event.y; |
| 85 | } |
| 86 | else { |
| 87 | flags |= KD_MOUSE_DELTA; |
| 88 | if ((private->lastx == 0) || (private->lasty == 0)) { |
| 89 | x = event.x; |
| 90 | y = event.y; |
| 91 | } |
| 92 | else { |
| 93 | x = event.x - private->lastx; |
| 94 | y = event.y - private->lasty; |
| 95 | } |
| 96 | } |
| 97 | private->lastx = event.x; |
| 98 | private->lasty = event.y; |
| 99 | } |
| 100 | else { |
| 101 | flags = 0; |
| 102 | x = private->lastx; |
| 103 | y = private->lasty; |
| 104 | } |
| 105 | |
| 106 | KdEnqueuePointerEvent(pi, flags, x, y, event.pressure); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | static Status |
| 111 | TslibEnable(KdPointerInfo * pi) |
| 112 | { |
| 113 | struct TslibPrivate *private = pi->driverPrivate; |
| 114 | |
| 115 | private->raw_event_hook = NULL; |
| 116 | private->raw_event_closure = NULL; |
| 117 | if (!pi->path) { |
| 118 | pi->path = strdup("/dev/input/touchscreen0"); |
| 119 | ErrorF("[tslib/TslibEnable] no device path given, trying %s\n", |
| 120 | pi->path); |
| 121 | } |
| 122 | |
| 123 | private->tsDev = ts_open(pi->path, 0); |
| 124 | if (!private->tsDev) { |
| 125 | ErrorF("[tslib/TslibEnable] failed to open %s\n", pi->path); |
| 126 | return BadAlloc; |
| 127 | } |
| 128 | |
| 129 | if (ts_config(private->tsDev)) { |
| 130 | ErrorF("[tslib/TslibEnable] failed to load configuration\n"); |
| 131 | ts_close(private->tsDev); |
| 132 | private->tsDev = NULL; |
| 133 | return BadValue; |
| 134 | } |
| 135 | |
| 136 | private->fd = ts_fd(private->tsDev); |
| 137 | |
| 138 | KdRegisterFd(private->fd, TsRead, pi); |
| 139 | |
| 140 | return Success; |
| 141 | } |
| 142 | |
| 143 | static void |
| 144 | TslibDisable(KdPointerInfo * pi) |
| 145 | { |
| 146 | struct TslibPrivate *private = pi->driverPrivate; |
| 147 | |
| 148 | if (private->fd) |
| 149 | KdUnregisterFd(pi, private->fd, TRUE); |
| 150 | |
| 151 | if (private->tsDev) |
| 152 | ts_close(private->tsDev); |
| 153 | |
| 154 | private->fd = 0; |
| 155 | private->tsDev = NULL; |
| 156 | } |
| 157 | |
| 158 | static Status |
| 159 | TslibInit(KdPointerInfo * pi) |
| 160 | { |
| 161 | struct TslibPrivate *private = NULL; |
| 162 | |
| 163 | if (!pi || !pi->dixdev) |
| 164 | return !Success; |
| 165 | |
| 166 | pi->driverPrivate = (struct TslibPrivate *) |
| 167 | calloc(sizeof(struct TslibPrivate), 1); |
| 168 | if (!pi->driverPrivate) |
| 169 | return !Success; |
| 170 | |
| 171 | private = pi->driverPrivate; |
| 172 | /* hacktastic */ |
| 173 | private->phys_screen = 0; |
| 174 | pi->nAxes = 3; |
| 175 | pi->name = strdup("Touchscreen"); |
| 176 | pi->inputClass = KD_TOUCHSCREEN; |
| 177 | |
| 178 | return Success; |
| 179 | } |
| 180 | |
| 181 | static void |
| 182 | TslibFini(KdPointerInfo * pi) |
| 183 | { |
| 184 | free(pi->driverPrivate); |
| 185 | pi->driverPrivate = NULL; |
| 186 | } |
| 187 | |
| 188 | KdPointerDriver TsDriver = { |
| 189 | "tslib", |
| 190 | TslibInit, |
| 191 | TslibEnable, |
| 192 | TslibDisable, |
| 193 | TslibFini, |
| 194 | NULL, |
| 195 | }; |