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Diffstat (limited to 'hw/xfree86/os-support/linux/lnx_mouse.c')
-rw-r--r--hw/xfree86/os-support/linux/lnx_mouse.c175
1 files changed, 174 insertions, 1 deletions
diff --git a/hw/xfree86/os-support/linux/lnx_mouse.c b/hw/xfree86/os-support/linux/lnx_mouse.c
index 8bc7e6331..3d0d30f52 100644
--- a/hw/xfree86/os-support/linux/lnx_mouse.c
+++ b/hw/xfree86/os-support/linux/lnx_mouse.c
@@ -1,4 +1,4 @@
-/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_mouse.c,v 1.1 1999/05/17 13:17:18 dawes Exp $ */
+/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_mouse.c,v 1.2 2003/10/08 14:58:30 dawes Exp $ */
/*
* Copyright 1999 by The XFree86 Project, Inc.
@@ -8,6 +8,10 @@
#include "xf86.h"
#include "xf86Xinput.h"
#include "xf86OSmouse.h"
+#include "xf86_OSlib.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
static int
SupportedInterfaces(void)
@@ -15,6 +19,172 @@ SupportedInterfaces(void)
return MSE_SERIAL | MSE_BUS | MSE_PS2 | MSE_XPS2 | MSE_AUTO;
}
+static const char *
+DefaultProtocol(void)
+{
+ return "Auto";
+}
+
+#define DEFAULT_MOUSE_DEV "/dev/mouse"
+#define DEFAULT_PS2_DEV "/dev/psaux"
+#define DEFAULT_GPM_DATA_DEV "/dev/gpmdata"
+#define DEFAULT_GPM_CTL_DEV "/dev/gpmdata"
+
+static const char *mouseDevs[] = {
+ DEFAULT_MOUSE_DEV,
+ DEFAULT_PS2_DEV,
+ DEFAULT_GPM_DATA_DEV,
+ NULL
+};
+
+typedef enum {
+ MOUSE_PROTO_UNKNOWN = 0,
+ MOUSE_PROTO_SERIAL,
+ MOUSE_PROTO_PS2,
+ MOUSE_PROTO_MSC,
+ MOUSE_PROTO_GPM
+} protocolTypes;
+
+static struct {
+ protocolTypes proto;
+ const char *name;
+} devproto[] = {
+ { MOUSE_PROTO_UNKNOWN, NULL },
+ { MOUSE_PROTO_PS2, "PS/2" },
+ { MOUSE_PROTO_MSC, "MouseSystems" },
+ { MOUSE_PROTO_GPM, "GPM" }
+};
+
+static const char *
+FindDevice(InputInfoPtr pInfo, const char *protocol, int flags)
+{
+ int fd = -1;
+ const char **pdev;
+
+ for (pdev = mouseDevs; *pdev; pdev++) {
+ SYSCALL (fd = open(*pdev, O_RDWR | O_NONBLOCK | O_EXCL));
+ if (fd == -1) {
+#ifdef DEBUG
+ ErrorF("Cannot open %s (%s)\n", *pdev, strerror(errno));
+#endif
+ } else
+ break;
+ }
+
+ if (*pdev) {
+ close(fd);
+ /* Set the Device option. */
+ pInfo->conf_idev->commonOptions =
+ xf86AddNewOption(pInfo->conf_idev->commonOptions, "Device", *pdev);
+ xf86Msg(X_INFO, "%s: Setting Device option to \"%s\"\n",
+ pInfo->name, *pdev);
+ }
+
+ return *pdev;
+}
+
+static const char *
+GuessProtocol(InputInfoPtr pInfo, int flags)
+{
+ int fd = -1;
+ const char *dev;
+ char *realdev;
+ struct stat sbuf;
+ int i;
+ int proto = MOUSE_PROTO_UNKNOWN;
+
+ dev = xf86SetStrOption(pInfo->conf_idev->commonOptions, "Device", NULL);
+ if (!dev) {
+#ifdef DEBUG
+ ErrorF("xf86SetStrOption failed to return the device name\n");
+#endif
+ return NULL;
+ }
+ /* Look at the device name to guess the protocol. */
+ realdev = NULL;
+ if (strcmp(dev, DEFAULT_MOUSE_DEV) == 0) {
+ if (lstat(dev, &sbuf) != 0) {
+#ifdef DEBUG
+ ErrorF("lstat failed for %s (%s)\n", dev, strerror(errno));
+#endif
+ return NULL;
+ }
+ if (S_ISLNK(sbuf.st_mode)) {
+ realdev = xnfalloc(PATH_MAX + 1);
+ i = readlink(dev, realdev, PATH_MAX);
+ if (i <= 0) {
+#ifdef DEBUG
+ ErrorF("readlink failed for %s (%s)\n", dev, strerror(errno));
+#endif
+ xfree(realdev);
+ return NULL;
+ }
+ realdev[i] = '\0';
+ }
+ }
+ if (!realdev)
+ realdev = xnfstrdup(dev);
+ else {
+ /* If realdev doesn't contain a '/' then prepend "/dev/" */
+ if (!strchr(realdev, '/')) {
+ char *tmp = xnfalloc(strlen(realdev) + 5 + 1);
+ sprintf(tmp, "/dev/%s", realdev);
+ xfree(realdev);
+ realdev = tmp;
+ }
+ }
+
+ if (strcmp(realdev, DEFAULT_PS2_DEV) == 0)
+ proto = MOUSE_PROTO_PS2;
+ else if (strcmp(realdev, DEFAULT_GPM_DATA_DEV) == 0)
+ proto = MOUSE_PROTO_MSC;
+ else if (strcmp(realdev, DEFAULT_GPM_CTL_DEV) == 0)
+ proto = MOUSE_PROTO_GPM;
+ xfree(realdev);
+ /*
+ * If the protocol can't be guessed from the device name,
+ * try to characterise it.
+ */
+ if (proto == MOUSE_PROTO_UNKNOWN) {
+ SYSCALL (fd = open(dev, O_RDWR | O_NONBLOCK | O_EXCL));
+ if (isatty(fd)) {
+ /* Serial PnP has already failed, so give up. */
+ } else {
+ if (fstat(fd, &sbuf) != 0) {
+#ifdef DEBUG
+ ErrorF("fstat failed for %s (%s)\n", dev, strerror(errno));
+#endif
+ close(fd);
+ return NULL;
+ }
+ if (S_ISFIFO(sbuf.st_mode)) {
+ /* Assume GPM data in MSC format. */
+ proto = MOUSE_PROTO_MSC;
+ } else {
+ /* Default to PS/2 */
+ proto = MOUSE_PROTO_PS2;
+ }
+ }
+ close(fd);
+ }
+ if (proto == MOUSE_PROTO_UNKNOWN) {
+ xf86Msg(X_ERROR, "%s: GuessProtocol: Cannot find mouse protocol.\n",
+ pInfo->name);
+ return NULL;
+ } else {
+ for (i = 0; i < sizeof(devproto)/sizeof(devproto[0]); i++) {
+ if (devproto[i].proto == proto) {
+ xf86Msg(X_INFO,
+ "%s: GuessProtocol: "
+ "setting mouse protocol to \"%s\"\n",
+ pInfo->name, devproto[i].name);
+ return devproto[i].name;
+ }
+ }
+ }
+ return NULL;
+}
+
OSMouseInfoPtr
xf86OSMouseInit(int flags)
{
@@ -24,6 +194,9 @@ xf86OSMouseInit(int flags)
if (!p)
return NULL;
p->SupportedInterfaces = SupportedInterfaces;
+ p->DefaultProtocol = DefaultProtocol;
+ p->FindDevice = FindDevice;
+ p->GuessProtocol = GuessProtocol;
return p;
}