/* * 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 - 2003 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 <unistd.h>#include "loader.h"#include "log.h"#include "modules.h"#include "moduledeps.h"#include "../isys/imount.h"/* boot flags */extern int flags;/* This forces a pause between initializing usb and trusting the /proc    stuff */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(DEBUGLVL, "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(DEBUGLVL, "%d seconds.", i);}int usbInitialize(moduleList modLoaded, moduleDeps modDeps,			 moduleInfoSet modInfo) {    struct device ** devices;    char * buf;    int i;    char * loadUsbStorage = NULL;    if (FL_NOUSB(flags)) return 0;    logMessage(INFO, "looking for usb controllers");    devices = probeDevices(CLASS_USB, BUS_PCI | BUS_PS3, 0);    if (!devices) {        logMessage(DEBUGLVL, "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++) {        if (!devices[i]->driver) continue;        logMessage(INFO, "found USB controller %s", devices[i]->driver);        if (mlLoadModuleSet(devices[i]->driver, modLoaded, modDeps, modInfo)) {            /* dont return, just keep going. */            /* may have USB built into kernel */            /* return 1; */        }    }    free(devices);    if (FL_TESTING(flags)) return 0;    if (doPwMount("/proc/bus/usb", "/proc/bus/usb", "usbfs", 0, NULL))	logMessage(ERROR, "failed to mount device usbfs: %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();    if (!FL_NOUSBSTORAGE(flags)) {        devices = probeDevices(CLASS_HD | CLASS_FLOPPY | CLASS_CDROM,                                BUS_USB, PROBE_ALL);        if (devices) {            /*            if (FL_UB(flags))                loadUsbStorage = ":ub";                else */                loadUsbStorage = ":usb-storage";            free(devices);        }    }    buf = alloca(40);    sprintf(buf, "hid:keybdev%s", (loadUsbStorage ? loadUsbStorage : ""));    mlLoadModuleSet(buf, modLoaded, modDeps, modInfo);    sleep(1);    return 0;}void usbInitializeMouse(moduleList modLoaded, moduleDeps modDeps,                        moduleInfoSet modInfo) {    if (FL_NOUSB(flags)) return;    logMessage(INFO, "looking for USB mouse...");    if (probeDevices(CLASS_MOUSE, BUS_USB, PROBE_ALL)) {        logMessage(INFO, "USB mouse found, loading mousedev module");        if (mlLoadModuleSet("mousedev:appletouch", modLoaded, modDeps, modInfo)) {            logMessage (DEBUGLVL, "failed to loading mousedev module");            return;        }    }}