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/**
* @file
* @section AUTHORS
*
* Copyright IBM, Corp. 2005-2006
* Copyright Red Hat, Inc. 2006-2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>,
* Markus Armbruster <armbru@redhat.com>,
* Daniel P. Berrange <berrange@redhat.com>,
* Pat Campbell <plc@novell.com>,
* Gerd Hoffmann <kraxel@redhat.com>
* Eamon Walsh <ewalsh@tycho.nsa.gov>
*
* @section LICENSE
*
* 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; under version 2 of the License.
*
* 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 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* @section DESCRIPTION
*
* This is the stock framebuffer and input backend code from QEMU,
* modified to call Linpicker instead of QEMU functions.
*
* This is the code for linpicker-monitor, which is responsible for setting
* up the framebuffer and input device backends in XenStore. This code
* acutally only handles XenStore writes during frontend state transitions;
* the initial setup is done using functions from libxenlight. No actual
* servicing of the devices are done here, that is linpicker-server's job.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <linux/fb.h>
#include "xen_backend.h"
#include "xen_linpicker.h"
#include "display.h"
static int width, height;
int xenfb_monitor_init(void)
{
struct fb_var_screeninfo fvs;
int rc, fd;
/* XXX test this failure case */
width = 800;
height = 600;
fd = open("/dev/fb0", O_RDONLY);
if (fd < 0)
return -1;
rc = ioctl(fd, FBIOGET_VSCREENINFO, &fvs);
if (rc == 0) {
width = fvs.xres_virtual;
height = fvs.yres_virtual - SECLABEL_HEIGHT;
}
close(fd);
return 0;
}
/* -------------------------------------------------------------------- */
static int input_init(struct XenDevice *xendev)
{
xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
xenstore_write_be_int(xendev, "width", width);
xenstore_write_be_int(xendev, "height", height);
return 0;
}
/* -------------------------------------------------------------------- */
static int fb_init(struct XenDevice *xendev)
{
#ifdef XENFB_TYPE_RESIZE
xenstore_write_be_int(xendev, "feature-resize", 1);
#endif
xenstore_write_be_int(xendev, "feature-grants", 1);
xenstore_write_be_int(xendev, "width", width);
xenstore_write_be_int(xendev, "height", height);
return 0;
}
static int fb_initialise(struct XenDevice *xendev)
{
int videoram, update;
if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1)
videoram = 0;
if (xenstore_read_fe_int(xendev, "feature-update", &update) == -1)
update = 0;
if (update)
xenstore_write_be_int(xendev, "request-update", 1);
XEN_BE_LOG(xendev, 1, "feature-update=%d, videoram=%d\n",
update, videoram);
return 0;
}
static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
{
struct XenFB *fb = (struct XenFB *)xendev;
/*
* Set state to Connected *again* once the frontend switched
* to connected. We must trigger the watch a second time to
* workaround a frontend bug.
*/
if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 &&
xendev->fe_state == XenbusStateConnected &&
xendev->be_state == XenbusStateConnected) {
XEN_BE_LOG(xendev, 2, "re-trigger connected (frontend bug)\n");
xen_be_set_state(xendev, XenbusStateConnected);
fb->bug_trigger = 1; /* only once */
}
}
static void fb_disconnect(struct XenDevice *xendev)
{
struct XenFB *fb = (struct XenFB *)xendev;
fb->feature_update = 0;
fb->bug_trigger = 0;
}
/* -------------------------------------------------------------------- */
struct XenDevOps xen_kbdmouse_ops = {
.size = sizeof(struct XenInput),
.init = input_init,
};
struct XenDevOps xen_framebuffer_ops = {
.size = sizeof(struct XenFB),
.init = fb_init,
.initialise = fb_initialise,
.disconnect = fb_disconnect,
.frontend_changed = fb_frontend_changed,
};
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