Quick Start Guide For WOW
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Quick Guide for Wake on WLAN
Date: 2019/2/26
Version: 0.8
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Quick Start Guide for Wake on Lan
(1) Support list:
.) USB interface: 8188EU, 8188CU, 8192DU, 8192EU, 8723BU, 8812AU,
8821AU, 88x2BU, 8188FU, 8723DU
.) SDIO interface: 8189ES, 8189FS, 8723BS, 8703C, 8192ES, 88x2BS,
8821AS, 8703BS, 8723DS, 8723CS.
.)PCI-E interface: 8812AE, 8821AE, 88x2BE, 8821CE, 8723BE.
(2) Requirements of wakeup via in-band and out-band methods:
.) In-band requirements:
SDIO Interface:
SDIO host MUST support remote wakeup feature.
SDIO data1 MUST be wakeup source in the host platform.
The platform MUST keep power to WiFi chip in suspend state.
The platform MSUT work fine between suspend and resume.
USB Interface:
USB host MUST support remote wakeup feature.
The platform MUST keep power to WiFi chip in suspend state.
The platform MSUT work fine between suspend and resume.
PCI Interface:
PCI host MUST support remote wakeup feature.
The platform MUST keep power to WiFi chip in suspend state.
The platform MSUT work fine between suspend and resume.
.) Out-band requirements:
The GPIO of the PLATFORM MUST be wakeup source.
The platform MUST keep power to WiFi chip in suspend state.
The platform MSUT work fine between suspend and resume.
The WIFI module MUST have the GPIO wakeup pin.
(3) Driver Configuration for Wake on WLAN:
.) In-band configuration:
If using SDIO DATA1 pin or USB protocol D+/D- toggle in-band method
to wakeup the host, driver need to do is only switch CONFIG_WOWLAN
from “n” to “y” in Makefile as Figure 1.
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(Figure 1)
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.) Out-band configuration:
If using out-band method, driver need to do is modify Makefile and config
GPIO. The detail is as following:
Makefile Configuration:
Switch CONFIG_WOWLAN and CONFIG_GPIO_WAKEUP from “n”
to “y” as Figure 2.
(Figure 2)
GPIO Configuration:
If use the module package, please use the driver default value. The
default value depends on HDK document.
If there is any customized requirement about
modify WIFI GPIO
number, please modiy the value of CONFIG_WAKEUP_GPIO_IDX in
Makefile and please contact with RTK technical support team first.
User could use “proc” subsystem to modify the behavior of WIFI GPIO
when receive wakeup up packet in non-suspend state.
wowlan_gpio_info to show WIFI wakeup host GPIO number and
high_active value:
cat /proc/net/rtlxxxx/wlanX/wowlan_gpio_info
modify high_active form 0 to 1 in wowlan_gpio_info:
echo 1 > /proc/net/rtlxxxx/wlanX/wowlan_gpio_info
high_active = 0 means pull low wake. (default)
high_active = 1 means pull high wake.
(Figure 3)
CONFIG_WAKEUP_TYPE:
If the setting of Makefile is CONFIG_WAKEUP_TYPE = 0x7, it means that
WOWLAN supports “deauth wake up”, “unicast wake up” and “magic packet wake
up”. The detail description is bit0: magic pkt, bit1: unicast and bit2: deauth.
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.) Setup the wake up pattern, ONLY support on driver version v5.1.0 or later:
iwpriv:
iwpriv wlanX wow_set_pattern pattern=[pattern]
Examples:
wake up on any packets sent to MAC 00:E0:4C:01:F0:EE
iwpriv wlanX wow_set_pattern pattern=00:E0:4C:01:F0:EE
echo pattern into wow_pattern_info:
echo [pattern] > /proc/net/rtl8xxx/wlanx/wow_pattern_info
Examples:
wake up on any packets sent to MAC 00:E0:4C:01:F0:EE
$ echo 00:E0:4C:01:F0:EE > /proc/net/rtl8xxx/wlanx/wow_pattern_info
.) clean wake up patterns, ONLY support on driver version v5.1.0 or later:
iwpriv:
iwpriv wlanX wow_set_pattern clean
Examples:
wake up on any packet sent to MAC 00:E0:4C:01:F0:EE
echo clean:
$echo clean> /proc/net/rtl8xxx/wlanx/wow_pattern_info
Patter Format:
The pattern begins with an 802.3 (Ethernet) header with the correct
src/dest MACs base on IPv4. All of the following parameters are need to
use HEX format. The more information is as following:
AA:AA:AA:AA:AA:AA:BB:BB:BB:BB:BB:BB:CC:CC:DD:-:-:-:-:-:-:-:-:EE:-:-:
FF:FF:FF:FF:GG:GG:GG:GG:HH:HH:II:II
A: Ethernet destination address
B: Ethernet source address
C: Ethernet protocol type
D: IP header VER + Hlen, use: 0x45 (4-is for ver. 4, 5 is for len. 20)
E: IP protocol
F: IP source address (192.168.0.1 C0:A8:00:01)
G: IP destination address (192.168.0.4 C0:A8:00:04)
H: Source port (1024: 04:00)
I: Destination port (1024: 04:00)
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(4) The wake up reason table:
The DUT could be waked up by the WIFI chip with the following reasons:
Reason Value
Description
Note
0x01
Receive pairwise key change packet.
0x02
Receive group key change packet.
0x04
Receive disassociate packet.
0x08
Receive de-auth. Packet.
0x10
AP power off, or could not receive
AP’s beacon in a period time
0x21
Receive magic packet.
0x22
Receive unicast packet.
The unicast packet included IP level.
0x23
Pattern Match
The device could be waked up by
specific pattern.
(5) wpa_supplicant Configuration for Wake on WLAN:
The configuration file of wpa_supplicant should add “wowlan_triggers=any” when
the driver adopt CFG80211 interface in the linux kernel. If there is no
“wowlan_triggers=any”, the CFG80211 module will send disconnect command to
wifi driver and the wake on WLAN function will fail.
Ex:
ctrl_interface=/var/run/wpa_supplicant
#update_config=1
wowlan_triggers=any
#connect to open network
network={
ssid="SSID"
psk="12345678"
}
The wpa_supplicant need to restart again after the wifi device/driver remove and
insert.
The below command can check the wowlan status of CFG80211:
//get the phy number mapping to wlan interface
#iw dev
phy#135
Interface wlan1
ifindex 138
type managed
phy#134
Interface wlan20
6
ifindex 137
type managed
//get the wowlan status, below is correct
#iw phy134 wowlan show
WoWLAN is enabled:
* wake up on special any trigger
//below wowlan status is wrong
iw phy134 wowlan show
WoWLAN is disabled.
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