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/*
* Copyright 2009 by Ping Cheng, Wacom. <pingc@wacom.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "xf86Wacom.h"
#include "wcmFilter.h"
#ifdef WCM_XORG_XSERVER_1_4
#ifndef _XF86_ANSIC_H
#include <fcntl.h>
#include <sys/stat.h>
#endif
/*****************************************************************************
* xf86WcmCheckSource - Check if there is another source defined this device
* before or not: don't add the tool by hal/udev if user has defined at least
* one tool for the device in xorg.conf. One device can have multiple tools
* with the same type to individualize tools with serial number or areas
****************************************************************************/
static Bool xf86WcmCheckSource(LocalDevicePtr local, dev_t min_maj)
{
int match = 0;
char* device;
char* lSource = xf86CheckStrOption(local->options, "_source", "");
LocalDevicePtr pDevices = xf86FirstLocalDevice();
WacomCommonPtr pCommon = NULL;
char* pSource;
for (; pDevices != NULL; pDevices = pDevices->next)
{
device = xf86CheckStrOption(pDevices->options, "Device", NULL);
/* device can be NULL on some distros */
if (!device || !strstr(pDevices->drv->driverName, "wacom"))
continue;
if (local != pDevices)
{
pSource = xf86CheckStrOption(pDevices->options, "_source", "");
pCommon = ((WacomDevicePtr)pDevices->private)->common;
if ( pCommon->min_maj && pCommon->min_maj == min_maj)
{
/* only add the new tool if the matching major/minor
* was from the same source */
if (strcmp(lSource, pSource))
{
match = 1;
break;
}
}
}
}
if (match)
xf86Msg(X_WARNING, "%s: device file already in use by %s."
" Ignoring.\n", local->name, pDevices->name);
return match;
}
/* check if the device has been added */
int wcmIsDuplicate(char* device, LocalDevicePtr local)
{
#ifdef _XF86_ANSIC_H
struct xf86stat st;
#else
struct stat st;
#endif
int isInUse = 0;
char* lSource = xf86CheckStrOption(local->options, "_source", "");
local->fd = -1;
/* always allow xorg.conf defined tools to be added */
if (!strlen(lSource)) goto ret;
/* open the port */
do {
SYSCALL(local->fd = open(device, O_RDONLY, 0));
} while (local->fd < 0 && errno == EINTR);
if (local->fd < 0)
{
/* can not open the device */
xf86Msg(X_ERROR, "Unable to open Wacom device \"%s\".\n", device);
isInUse = 1;
goto ret;
}
#ifdef _XF86_ANSIC_H
if (xf86fstat(local->fd, &st) == -1)
#else
if (fstat(local->fd, &st) == -1)
#endif
{
/* can not access major/minor to check device duplication */
xf86Msg(X_ERROR, "%s: stat failed (%s). cannot check for duplicates.\n",
local->name, strerror(errno));
/* older systems don't support the required ioctl. let it pass */
goto ret;
}
if ((int)st.st_rdev)
{
/* device matches with another added port */
if (xf86WcmCheckSource(local, st.st_rdev))
{
isInUse = 3;
goto ret;
}
}
else
{
/* major/minor can never be 0, right? */
xf86Msg(X_ERROR, "%s: device opened with a major/minor of 0. "
"Something was wrong.\n", local->name);
isInUse = 4;
}
ret:
if (local->fd >= 0)
{
close(local->fd);
local->fd = -1;
}
return isInUse;
}
static struct
{
const char* type;
__u16 tool;
} wcmType [] =
{
{ "stylus", BTN_TOOL_PEN },
{ "eraser", BTN_TOOL_RUBBER },
{ "cursor", BTN_TOOL_MOUSE },
{ "touch", BTN_TOOL_DOUBLETAP },
{ "pad", BTN_TOOL_FINGER }
};
static Bool checkValidType(char* type, unsigned long* keys)
{
int j, ret = FALSE;
/* walkthrough all types */
for (j = 0; j < sizeof (wcmType) / sizeof (wcmType [0]); j++)
{
if (!strcmp(wcmType[j].type, type))
if (ISBITSET (keys, wcmType[j].tool))
ret = TRUE;
}
return ret;
}
/* validate tool type for device/product */
Bool wcmIsAValidType(char* device, LocalDevicePtr local)
{
Bool ret = FALSE;
int fd = -1;
unsigned long keys[NBITS(KEY_MAX)];
char* type = xf86FindOptionValue(local->options, "Type");
SYSCALL(fd = open(device, O_RDONLY));
if (fd < 0)
return FALSE;
/* test if the tool is defined in the kernel */
if (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keys)), keys) < 0)
{
xf86Msg(X_ERROR, "WACOM: wcmIsAValidType unable to ioctl key bits.\n");
return FALSE;
}
close(fd);
ret = checkValidType(type, keys);
return ret;
}
#endif /* WCM_XORG_XSERVER_1_4 */
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