pcDuino 上RT3070 SoftAP：修改在Linux 3.18.0 内核上的编译错误

RT3070 SoftAP：修改在Linux 3.18.0 内核上的编译错误

http://bbs.eetop.cn/thread-478234-1-1.html

http://blog.sina.com.cn/s/blog_6e5e78bf0100vk2f.htm

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http://www.geek-workshop.com/thread-5040-1-1.html

http://blog.sina.com.cn/s/blog_c612638e0101jrm7.html
RT3070 ,  SoftAP

1. Rt_linux.c编译时报错 /workspace/git/2010_0203_RT3070_SoftAP_v2.4.0.1_DPA/UTIL/os/linux/../../os/linux/rt_linux.c: In function 'RtmpOSFSInfoChange': /workspace/git/2010_0203_RT3070_SoftAP_v2.4.0.1_DPA/UTIL/os/linux/../../os/linux/rt_linux.c:991:20:error: incompatible types when assigning to type 'int' from type 'kuid_t'    pOSFSInfo->fsuid = current_fsuid();                     ^ /workspace/git/2010_0203_RT3070_SoftAP_v2.4.0.1_DPA/UTIL/os/linux/../../os/linux/rt_linux.c:992:20: error: incompatible types when assigning to type 'int' from type 'kgid_t'    pOSFSInfo->fsgid = current_fsgid();                       ^ 修改============= Rt_linux.c diff: line 991 -        pOSFSInfo->fsuid = current_fsuid(); +        pOSFSInfo->fsuid = current_fsuid().val; diff: line 992 -        pOSFSInfo->fsgid = current_fsgid().val; +        pOSFSInfo->fsgid = current_fsgid().val;         2. 继续报错： GPL-incompatible module rt3070ap.ko uses GPL-only symbol '__rcu_read_unlock'  修改============= Rtmp_init.c  diff: line 5242 -MODULE_LICENSE("RALINK"); +MODULE_LICENSE("GPL"); History:2011-10-25 Author:yr 雷凌系列网卡驱动移植后的调试工作记录： 为了支持多块wifi网卡同时在板子上启动，需要修改驱动源代码的参数。 假设板子上有3块网卡，都作为AP端使用，加载移植好的驱动后，分别驱动出ra0,ra1,ra2三个接口。 ifconfig ra0 up 成功,ifconfig ra1 up 时 提示： <-- ERROR in Alloc TX TxContext[3] HTTX_BUFFER!!                                                            <-- RTMPAllocTxRxRingMemory,Status=3                                                                                    ERROR!!! RTMPAllocDMAMemory failed,Status[=0x00000003]                                                !!! rt28xx Initialized fail!!!                                                                                                ifconfig: SIOCSIFFLAGS: Operation notpermitted  修改MODULE NETIFUTIL三个目录下的include/os/rt_linux.h中BULKAGGRE_SIZE参数，将100改为60，可以成功启动ra0和 ra1 但是ra2启动失败。继续减小这一参数值，到30后，三快都可以启动成功。 ifconfig rax up时若提示BIRIdx(0): RXDMALen not multiple of 4.[38539],BulkInBufLen = 172，说明DMA空间不够下一块网卡加载了，需要继续减小，但是应该会影响性能。 ////////////////////////////////下面内容转载自一技术帖回复/////////////////////////////////// 该网卡驱动需要使用DMA内存，而且还挺大（没记错的话有200k左右），出错的原因是驱动申请DMA内存失败。  解决办法：  1. 先确定系统可用于DMA的内存有多大，其他驱动是否用得差不多了。  2. 如果不能修改系统DMA内存大小，那么  3. 修改rt2870驱动rtmp_usb.h将BULKAGGRE_ZISE宏改小一些，比如(60) 在网上看到的。 http://www.61ic.com/code/redirect.php?fid=170&tid=18751&goto=nextoldset http://blog.csdn.net/bbandxq521/archive/2010/11/09/5997419.aspx 如果再次出现一些error的话： [99] RtmpOSFileOpen(): Error 2 opening/etc/Wireless/RT2870STA/RT2870STA.dat [99] Open file "/etc/Wireless/RT2870STA/RT2870STA.dat"failed! [99] 1. Phy Mode = 0 [99] ERROR!!! NICReadRegParameters failed,Status[=0x00000001] [99] usb 1-1: RtmpTimerTask timed out on ep0in len=4/4 [99] usb 1-1: wpa_supplicant timed out on ep0in len=4/4 [99] ---> RTMPFreeTxRxRingMemory [99] <--- RTMPFreeTxRxRingMemory [99] !!! rt28xx Initialized fail !!! [99] rt28xx_open return fail! 如果是PC机，请参考驱动包里的sta_ate_iwpriv_usage.txt文件。里面有这样的英文： ======================================================================= CONFIGURATION:   ==================== RT2870 driver can be configured via followinginterfaces,  i.e. (i)"iwconfig" command, (ii)"iwpriv" command, (iii)configuration file i) iwconfig comes with kernel.   ii) iwpriv usage, please refer to file "iwpriv_usage.txt" fordetails. iii)modify configuration file "RT2870STA.dat" in/etc/Wireless/RT2870STA/RT2870STA.dat.     Configuration File : RT2870STA.dat --------------------------------------- # Copy this file to /etc/Wireless/RT2870STA/RT2870STA.dat # This file is a binary file and will be read on loading rt.omodule. # # Use "vi RT2870STA.dat" to modify settings according to yourneed. #  # 1.) set NetworkType to "Adhoc" for using Adhoc-mode, otherwiseusing Infrastructure # 2.) set Channel to "0" for auto-select on Infrastructuremode # 3.) set SSID for connecting to your Accss-point. # 4.) AuthMode can be "WEPAUTO", "OPEN", "SHARED", "WPAPSK","WPA2PSK", "WPANONE" # 5.) EncrypType can be "NONE", "WEP", "TKIP", "AES" # for more information refer to the Readme file. #  因为我是做嵌入式的，为了省事，就将RT2870STA.dat直接固话到嵌入式设备里。然后修改路径就OK了。路径在/include/os/rt_linux.h里。