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/*
* usb.c - usb probing/module loading functionality
*
* Erik Troan <ewt@redhat.com>
* Matt Wilson <msw@redhat.com>
* Michael Fulbright <msf@redhat.com>
* Jeremy Katz <katzj@redhat.com>
*
* Copyright 1999 - 2002 Red Hat, Inc.
*
* This software may be freely redistributed under the terms of the GNU
* General Public License.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <alloca.h>
#include <errno.h>
#include <fcntl.h>
#include <kudzu/kudzu.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include "loader.h"
#include "log.h"
#include "modules.h"
#include "moduledeps.h"
#include "../isys/imount.h"
/* This forces a pause between initializing usb and trusting the /proc
stuff */
static void sleepUntilUsbIsStable(void) {
struct stat sb;
time_t last = 0;
int i, count = 0;
/* sleep for a maximum of 20 seconds, minimum of 2 seconds */
logMessage("waiting for usb to become stable...");
for (i = 0; i < 20; i++) {
stat("/proc/bus/usb/devices", &sb);
if (last == sb.st_mtime) {
count++;
/* if we get the same mtime twice in a row, should be
good enough to use now */
if (count > 1)
break;
} else {
/* if we didn't match mtimes, reset the stability counter */
count = 0;
}
last = sb.st_mtime;
sleep(1);
}
logMessage("%d seconds.", i);
}
int usbInitialize(moduleList modLoaded, moduleDeps modDeps,
moduleInfoSet modInfo, int flags) {
struct device ** devices;
char * buf;
int i;
if (FL_NOUSB(flags)) return 0;
logMessage("looking for usb controllers");
devices = probeDevices(CLASS_USB, BUS_PCI, PROBE_ALL);
if (!devices) {
logMessage("no usb controller found");
return 0;
}
/* JKFIXME: if we looked for all of them, we could batch this up and it
* would be faster */
for (i=0; devices[i]; i++) {
logMessage("found USB controller %s", devices[i]->driver);
if (mlLoadModuleSet(devices[i]->driver, modLoaded, modDeps,
modInfo, flags)) {
/* dont return, just keep going. */
/* may have USB built into kernel */
/* return 1; */
}
}
if (FL_TESTING(flags)) return 0;
if (doPwMount("/proc/bus/usb", "/proc/bus/usb", "usbdevfs", 0, 0,
NULL, NULL))
logMessage("failed to mount device usbdevfs: %s", strerror(errno));
/* sleep so we make sure usb devices get properly enumerated.
that way we should block when initializing each usb driver until
the device is ready for use */
sleepUntilUsbIsStable();
buf = alloca(40);
sprintf(buf, "hid:keybdev%s",
(FL_NOUSBSTORAGE(flags) ? "" : ":usb-storage"));
mlLoadModuleSet(buf, modLoaded, modDeps, modInfo, flags);
sleep(1);
return 0;
}
void usbInitializeMouse(moduleList modLoaded, moduleDeps modDeps,
moduleInfoSet modInfo, int flags) {
extern struct moduleBallLocation * secondStageModuleLocation;
if (FL_NOUSB(flags)) return;
if (access("/proc/bus/usb/devices", R_OK)) return;
logMessage("looking for USB mouse...");
if (probeDevices(CLASS_MOUSE, BUS_USB, PROBE_ALL)) {
logMessage("USB mouse found, loading mousedev module");
if (mlLoadModuleSetLocation("mousedev", modLoaded, modDeps, modInfo, flags, secondStageModuleLocation)) {
logMessage ("failed to loading mousedev module");
return;
}
}
}
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