/* Implementation of the BSD usleep function using nanosleep.
 Copyright (C) 1996, 1997, 1999, 2001, 2003 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

 The GNU C Library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 
  The GNU C Library 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 Lesser General Public
  License along with the GNU C Library; if not, see
  <http://www.gnu.org/licenses/>. */
 
#include <time.h>
#include <unistd.h>

int
usleep (useconds_t useconds)
{
 struct timespec ts = { .tv_sec = (long int) (useconds / 1000000),
 .tv_nsec = (long int) (useconds % 1000000) * 1000ul };

 /* Note the usleep() is a cancellation point. But since we call
 nanosleep() which itself is a cancellation point we do not have
 to do anything here. */
 return __nanosleep (&ts, NULL);
}

/* Copyright (C) 1996, 1997, 2002 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 The GNU C Library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 The GNU C Library 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 Lesser General Public
 License along with the GNU C Library; if not, see
 <http://www.gnu.org/licenses/>. */

#include <errno.h>
#include <time.h>


/* Pause execution for a number of nanoseconds. */
 int
 __libc_nanosleep (const struct timespec *requested_time,
  struct timespec *remaining)
 {
  __set_errno (ENOSYS);
  return -1;
 }
 stub_warning (nanosleep)
 
 weak_alias (__libc_nanosleep, __nanosleep)
 libc_hidden_def (__nanosleep)
 weak_alias (__libc_nanosleep, nanosleep)

root@OpenWrt:/# lsmod
Module                  Size  Used by    Tainted: G  
option                 14992  0 
usb_wwan                6560  1 option
cdc_wdm                 7072  0 
usbserial              23792  2 option,usb_wwan
usbnet                 12032  0 
ath79_wdt               2240  1

root@OpenWrt:~# cat /proc/bus/usb/devices

....
P:  Vendor=12d1 ProdID=1506 Rev= 0.00
S:  Manufacturer=Huawei Technologies
S:  Product=HUAWEI Mobile
C:* #Ifs= 7 Cfg#= 1 Atr=c0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=option
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=02 Driver=option
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=03 Driver=option
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 3 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=01 Prot=09 Driver=cdc_wdm
E:  Ad=85(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
I:* If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=08 Driver=(none)
E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 5 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
....

[   34.990000] usbcore: registered new interface driver usbserial
[   34.990000] USB Serial support registered for generic
[   35.000000] usbcore: registered new interface driver usbserial_generic
[   35.010000] usbserial: USB Serial Driver core
[   35.040000] cdc_wdm 1-1:1.3: Ignoring extra header, type 15, length 13
[   35.050000] cdc_wdm 1-1:1.3: Ignoring extra header, type 6, length 5
[   35.050000] cdc_wdm 1-1:1.3: cdc-wdm0: USB WDM device
[   35.060000] usbcore: registered new interface driver cdc_wdm
[   35.100000] USB Serial support registered for GSM modem (1-port)
[   35.100000] option 1-1:1.0: GSM modem (1-port) converter detected

root@OpenWrt:/# opkg list-installed
......
kmod-qmi-wwan - 3.3.8-1
kmod-scsi-core - 3.3.8-1
kmod-usb-core - 3.3.8-1
kmod-usb-net - 3.3.8-1
kmod-usb-ohci - 3.3.8-1
kmod-usb-serial - 3.3.8-1
kmod-usb-serial-option - 3.3.8-1
kmod-usb-serial-wwan - 3.3.8-1
kmod-usb-storage - 3.3.8-1
kmod-usb-uhci - 3.3.8-1
kmod-usb-wdm - 3.3.8-1
kmod-usb2 - 3.3.8-1
.....