关于在2440上移植rtl8192和rtl8188cus linux驱动遇到的问题及解决方法！！！

很早就想在2440上移植无线网卡驱动了，在网上也看了不少相关的资料，但真正做起来才发现有不少问题。

一开始，我用从同学那里拿来的TL-WN725N（这卡便宜啊，50左右成交，TB上坑爹的2440无线网卡最低也要90+），但是不知为什么把驱动编译好了，插上网卡，执行insmod，再执行ifconfig wlan0 up时老出错。

root@VTK321 /(-_-!)>usb 1-1: new full speed USB device using s3c2410-ohci and ad

dress 2

usb 1-1: New USB device found, idVendor=0bda, idProduct=8176

usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

usb 1-1: Product: 802.11n WLAN Adapter

usb 1-1: Manufacturer: Realtek

usb 1-1: SerialNumber: 00e04c000001

usb 1-1: configuration #1 chosen from 1 choice

root@VTK321 /(-_-!)>insmod 8192cu.ko

rtw driver version=v3.4.3_4369.20120622

Build at: Nov 30 2012 16:32:00

register rtw_netdev_ops to netdev_ops

CHIP TYPE: RTL8188C_8192C

usb_endpoint_descriptor(0):

bLength=7

bDescriptorType=5

bEndpointAddress=81

wMaxPacketSize=40

bInterval=0

RT_usb_endpoint_is_bulk_in = 1

usb_endpoint_descriptor(1):

bLength=7

bDescriptorType=5

bEndpointAddress=2

wMaxPacketSize=40

bInterval=0

RT_usb_endpoint_is_bulk_out = 2

usb_endpoint_descriptor(2):

bLength=7

bDescriptorType=5

bEndpointAddress=3

wMaxPacketSize=40

bInterval=0

RT_usb_endpoint_is_bulk_out = 3

usb_endpoint_descriptor(3):

bLength=7

bDescriptorType=5

bEndpointAddress=84

wMaxPacketSize=40

bInterval=1

RT_usb_endpoint_is_int_in = 4, Interval = 1

nr_endpoint=4, in_num=2, out_num=2

NON USB_SPEED_HIGH

Chip Version ID: VERSION_NORMAL_TSMC_CHIP_88C.

RF_Type is 3!!

EEPROM type is E-FUSE

====> ReadAdapterInfo8192C

Boot from EFUSE, Autoload OK !

EEPROMVID = 0x0bda

EEPROMPID = 0x8176

EEPROMCustomerID : 0x00

EEPROMSubCustomerID: 0x00

RT_CustomerID: 0x00

_ReadMACAddress MAC Address from EFUSE = ec:88:8f:bf:fa:e7

EEPROMRegulatory = 0x0

_ReadBoardType(0)

BT Coexistance = disable

RT_ChannelPlan: 0x02

_ReadPSSetting...bHWPwrPindetect(0)-bHWPowerdown(0) ,bSupportRemoteWakeup(0)
### PS params=>  power_mgnt(1),usbss_enable(0) ###

### AntDivCfg(0)

readAdapterInfo_8192CU(): REPLACEMENT = 1

<==== ReadAdapterInfo8192C in 2165 ms

rtw_macaddr_cfg MAC Address  = ec:88:8f:bf:fa:e7

MAC Address from pnetdev->dev_addr= ec:88:8f:bf:fa:e7

bDriverStopped:1, bSurpriseRemoved:0, bup:0, hw_init_completed:0

usbcore: registered new interface driver rtl8192cu

root@VTK321 /(-_-!)>

//------------------------------------------------------------------------------------------------------------------------------------------------------------//

root@VTK321 /(-_-!)>ifconfig wlan0 up

+871x_drv - drv_open, bup=0

 ===> FirmwareDownload91C() fw:Rtl819XFwImageArray_TSMC

FirmwareDownload92C accquire FW from embedded image

fw_ver=v80, fw_subver=0, sig=0x88c0

fw download ok!

Set RF Chip ID to RF_6052 and RF type to 1T1R.

IOL rtl8192c_IOL_exec_cmds_sync complete in 20ms

IOL rtl8192c_IOL_exec_cmds_sync complete in 20ms

IOL rtl8192c_IOL_exec_cmds_sync complete in 65ms

IOL rtl8192c_IOL_exec_cmds_sync complete in 60ms

IOL rtl8192c_IOL_exec_cmds_sync complete in 250ms

IQ
b2b4
K:Start!!!

Path A Rx IQK fail!!

Path A Rx IQK fail!!

Path A IQK Only  Tx Success!!

Path A Rx IQK fail!!

Path A Rx IQK fail!!

Path A IQK Only  Tx Success!!

IQK: final_candidate is 0

IQK: RegE94=100 RegE9C=f RegEA4=0 RegEAC=0 RegEB4=0 RegEBC=0 RegEC4=0 RegECC=0

 Path A IQ Calibration Success !

_PHY_PathAFillIQKMatrix only Tx OK

pdmpriv->TxPowerTrackControl = 1

MAC Address from REG_MACID = ec:88:8f:bf:fa:e7

rtl8192cu_hal_init in 1755ms

MAC Address = ec:88:8f:bf:fa:e7

-871x_drv - drv_open, bup=1

root@VTK321 /(-_-!)>==>pwr_state_check_handler .fw_state(0)

==> rtw_ps_cmd  , enqueue CMD

==>rtw_ps_processor .fw_state(0)

==>ips_enter cnts:1

==>power_saving_ctrl_wk_hdl change rf to OFF...LED(0x00020808)....

===> rtw_ips_pwr_down...................

====> rtw_ips_dev_unload...

usb_read_port_cancel

usb_write_port_cancel

==> rtl8192cu_hal_deinit

bkeepfwalive(0)

card disble without HWSM...........

<=== rtw_ips_pwr_down..................... in 315ms

从反馈信息看到设备是挂上了，但是一直提示usb读写取消。

先是怀疑驱动错了，但是网上移植方法都大同小异，而且都是这样的。接着换板子，还是一样情况。最后换网卡，换成磊科NW336（rtl8188cus芯片）也还是一样，不过却发现NW336的指示灯一开始亮了，当出现==>pwr_state_check_handler
.fw_state(0)时就灭了。于是翻查芯片的手册，看到8188具有省电模式，在Makefile中默认选上，而且加载驱动时，也默认最小省电模式（没错，就是上面代码红色的地方，旁边的应该是usb自动休眠，也是坑爹玩意）。

You can easy set the power saving to Min-PS (rtw_power_mgnt=1) by modify

the CONFIG_POWER_SAVING to y, at the line 20 of Makefile file.

Ex:

CONFIG_POWER_SAVING = y

于是尝试了一下，执行insmod 8192cu.ko rtw_power_mgnt=0（关闭省电模式），然后ifconfig wlan0 up，

等了一下，没出现usb读写取消的信息，NW336的指示灯也亮着，于是执行iwlist scanning，网卡很快就搜到了AP。

看来就是省电模式和2440有冲突啊。苦战了N久，终于搞定了.................

PS：如果不想每次insmod都带参数，在Makefile里把CONFIG_POWER_SAVING设成N就行了！！！