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-rw-r--r--src/evdev_brain.c284
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diff --git a/src/evdev_brain.c b/src/evdev_brain.c
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+/*
+ * Copyright © 2006 Zephaniah E. Hull
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Soft-
+ * ware"), to deal in the Software without restriction, including without
+ * limitation the rights to use, copy, modify, merge, publish, distribute,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, provided that the above copyright
+ * notice(s) and this permission notice appear in all copies of the Soft-
+ * ware and that both the above copyright notice(s) and this permission
+ * notice appear in supporting documentation.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+ * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
+ * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
+ * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
+ * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
+ * MANCE OF THIS SOFTWARE.
+ *
+ * Except as contained in this notice, the name of a copyright holder shall
+ * not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization of
+ * the copyright holder.
+ *
+ * Author: Zephaniah E. Hull (warp@aehallh.com)
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define HAVE_WRAPPER_DECLS
+#include "xf86_OSlib.h"
+
+#include "evdev.h"
+
+#include <xf86.h>
+
+#ifndef SYSCALL
+#define SYSCALL(call) while(((call) == -1) && (errno == EINTR))
+#endif
+
+static Bool evdev_alive = FALSE;
+static InputInfoPtr evdev_pInfo = NULL;
+static evdevDriverPtr evdev_drivers = NULL;
+static int evdev_seq;
+
+static int
+glob_match(const char *pattern, const char *matchp)
+{
+ int i, j = 0, ret = 0;
+ if (!(pattern && matchp))
+ return (strlen(pattern) == strlen(matchp));
+
+ for (i = 0; matchp[i]; i++) {
+ if (pattern[j] == '\\')
+ j++;
+ else if (pattern[j] == '*') {
+ if (pattern[j + 1]) {
+ if (!glob_match(pattern+j+1,matchp+i))
+ return 0;
+ } else
+ return 0;
+ continue;
+ } else if (pattern[j] == '?') {
+ j++;
+ continue;
+ }
+
+ if ((ret = (pattern[j] - matchp[i])))
+ return ret;
+
+ j++;
+ }
+ if (!pattern[j] || ((pattern[j] == '*') && !pattern[j + 1]))
+ return 0;
+ else
+ return 1;
+}
+
+
+int
+evdevGetFDForDevice (evdevDevicePtr device)
+{
+ int fd;
+
+ if (!device)
+ return -1;
+
+
+ if (device->device) {
+ SYSCALL(fd = open (device->device, O_RDWR | O_NONBLOCK));
+ if (fd == -1)
+ xf86Msg(X_ERROR, "%s (%d): Open failed: %s\n", __FILE__, __LINE__, strerror(errno));
+ return fd;
+ } else
+ return -1;
+}
+
+#define device_add(driver,device) do { \
+ device->next = driver->devices; \
+ driver->devices = device; \
+} while (0)
+
+static void
+evdevRescanDevices (InputInfoPtr pInfo)
+{
+ char dev[20];
+ char name[256], phys[256];
+ int fd, i;
+ int old_seq = evdev_seq;
+ evdevDriverPtr driver;
+ evdevDevicePtr device;
+ Bool found;
+
+ evdev_seq++;
+ xf86Msg(X_INFO, "%s: Rescanning devices (%d).\n", pInfo->name, evdev_seq);
+
+ for (i = 0; i < 32; i++) {
+ snprintf(dev, sizeof(dev), "/dev/input/event%d", i);
+ SYSCALL(fd = open (dev, O_RDWR | O_NONBLOCK));
+ if (fd == -1)
+ continue;
+
+ if (ioctl(fd, EVIOCGNAME(sizeof(name)), name) == -1)
+ name[0] = '\0';
+ if (ioctl(fd, EVIOCGPHYS(sizeof(phys)), phys) == -1)
+ phys[0] = '\0';
+
+ for (driver = evdev_drivers; driver; driver = driver->next) {
+ if (driver->name && glob_match(driver->name, name))
+ continue;
+ if (driver->phys && glob_match(driver->phys, phys))
+ continue;
+ if (driver->device && glob_match(driver->device, dev))
+ continue;
+
+ found = 0;
+ for (device = driver->devices; device; device = device->next) {
+ xf86Msg(X_INFO, "%s: %s %d -> %s %d.\n", pInfo->name, name, evdev_seq, device->name, device->seen);
+ if (!strcmp(device->name, name)) {
+ if (device->seen != old_seq) {
+ device->device = xstrdup(dev);
+ device->phys = xstrdup(phys);
+ device->callback(device->pInfo->dev, DEVICE_ON);
+ }
+
+ device->seen = evdev_seq;
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ device = Xcalloc (sizeof (evdevDeviceRec));
+
+ device->device = xstrdup(dev);
+ device->name = xstrdup(name);
+ device->phys = xstrdup(phys);
+ device->seen = evdev_seq;
+ device_add(driver, device);
+ driver->callback(driver, device);
+ }
+
+ device->seen = evdev_seq;
+ break;
+ }
+ close (fd);
+ }
+
+ for (driver = evdev_drivers; driver; driver = driver->next)
+ for (device = driver->devices; device; device = device->next)
+ if (device->seen == old_seq) {
+ device->callback(device->pInfo->dev, DEVICE_OFF);
+
+ if (device->device)
+ xfree(device->device);
+ device->device = NULL;
+
+ if (device->phys)
+ xfree(device->phys);
+ device->phys = NULL;
+ }
+}
+
+static void
+evdevReadInput (InputInfoPtr pInfo)
+{
+ /*
+ * XXX: Freezing the server for a moment is not really friendly.
+ * But we need to wait until udev has actually created the device.
+ */
+ usleep (500000);
+ evdevRescanDevices (pInfo);
+}
+
+static int
+evdevControl(DeviceIntPtr pPointer, int what)
+{
+ InputInfoPtr pInfo;
+
+ pInfo = pPointer->public.devicePrivate;
+
+ switch (what) {
+ case DEVICE_INIT:
+ pPointer->public.on = FALSE;
+ break;
+
+ case DEVICE_ON:
+ /*
+ * XXX: We do /proc/bus/usb/devices instead of /proc/bus/input/devices
+ * because the only hotplug input devices at the moment are USB...
+ * And because the latter is useless to poll/select against.
+ * FIXME: Get a patch in the kernel which fixes the latter.
+ */
+ pInfo->fd = open ("/proc/bus/usb/devices", O_RDONLY);
+ if (pInfo->fd == -1) {
+ xf86Msg(X_ERROR, "%s: cannot open /proc/bus/usb/devices.\n", pInfo->name);
+ return BadRequest;
+ }
+ xf86FlushInput(pInfo->fd);
+ AddEnabledDevice(pInfo->fd);
+ pPointer->public.on = TRUE;
+ evdevRescanDevices (pInfo);
+ break;
+
+ case DEVICE_OFF:
+ case DEVICE_CLOSE:
+ if (pInfo->fd != -1) {
+ RemoveEnabledDevice(pInfo->fd);
+ close (pInfo->fd);
+ pInfo->fd = -1;
+ }
+ pPointer->public.on = FALSE;
+ break;
+ }
+ return Success;
+}
+
+Bool
+evdevStart (InputDriverPtr drv)
+{
+ InputInfoRec *pInfo;
+
+ if (evdev_alive)
+ return TRUE;
+
+ if (!(pInfo = xf86AllocateInput(drv, 0)))
+ return FALSE;
+
+ evdev_alive = TRUE;
+
+ pInfo->name = "evdev brain";
+ pInfo->type_name = "evdev brain";
+ pInfo->device_control = evdevControl;
+ pInfo->read_input = evdevReadInput;
+ pInfo->fd = -1;
+ pInfo->flags = XI86_CONFIGURED | XI86_OPEN_ON_INIT;
+
+ evdev_pInfo = pInfo;
+ return TRUE;
+}
+
+Bool
+evdevNewDriver (evdevDriverPtr driver)
+{
+ if (!evdev_alive)
+ return FALSE;
+ if (!(driver->name || driver->phys || driver->device))
+ return FALSE;
+ if (!driver->callback)
+ return FALSE;
+
+ driver->next = evdev_drivers;
+ evdev_drivers = driver;
+
+ evdevRescanDevices (evdev_pInfo);
+ driver->configured = TRUE;
+ return TRUE;
+}
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