linux-2.6.38到tiny6410的移植手册(连载4)USB设备(U盘摄像头wifi).doc

linux-2.6.38到tiny6410的移植手册（连载4）_USB设备(U盘,摄像头,wifi)今天来讲讲一些USB设备(U盘,摄像头,wifi)的驱动吧，它的特点是内核已经带非常完善的驱动了，我们需要的就是配置而已，和很少的修改而已。一、首先是U盘得支持。1、vi arch/arm/mach-s3c64xx/mach-mini6410.c124行增加/* Initializes OTG Phy. to output 48M clock */void s3c_otg_phy_config(int enable) u32 val;if (enable) _raw_writel(0x0, S3C_PHYPWR);/* Power up */val = _raw_readl(S3C_PHYCLK);val &= S3C_PHYCLK_CLKSEL_MASK;_raw_writel(val, S3C_PHYCLK);_raw_writel(0x1, S3C_RSTCON);udelay(5);_raw_writel(0x0, S3C_RSTCON);/* Finish the reset */udelay(5); else _raw_writel(0x19, S3C_PHYPWR); /* Power down */2、vi drivers/usb/host/ohci-s3c2410.c修改方法 -25,10 +25,14 #define valid_port(idx) (idx) = 1 | (idx) = 2)+#ifdef CONFIG_MACH_MINI6410+extern void s3c_otg_phy_config(int enable);+#endif+/* clock device associated with the hcd */static struct clk *clk;-static struct clk *usb_clk;+static struct clk *otg_clk, *usb_clk;/* forward definitions */ -47,6 +51,11 dev_dbg(&dev-dev, s3c2410_start_hc:n);+clk_enable(otg_clk);+#ifdef CONFIG_MACH_MINI6410+s3c_otg_phy_config(1);+#endif+ clk_enable(usb_clk); mdelay(2);/* let the bus clock stabilise */ -79,6 +88,7 clk_disable(clk); clk_disable(usb_clk);+clk_disable(otg_clk);/* ohci_s3c2410_hub_status_data -375,6 +385,13 goto err_clk; +otg_clk = clk_get(&dev-dev, otg);+if (IS_ERR(otg_clk) +dev_err(&dev-dev, cannot get otg clockn);+retval = -ENOENT;+goto err_otg;+ s3c2410_start_hc(dev, hcd); hcd-regs = ioremap(hcd-rsrc_start, hcd-rsrc_len); -395,6 +412,10 err_ioremap: s3c2410_stop_hc(dev); iounmap(hcd-regs);+clk_put(otg_clk);+ err_otg: clk_put(usb_clk);err_clk:3、make menuconfigDevice Drivers-SCSI device support- SCSI device support SCSI disk support SCSI generic supportUSB support Support for Host-side USB * USB device filesystem (DEPRECATED) USB Monitor OHCI HCD support USB Mass Storage supportFile systems-DOS/FAT/NT Filesystems- MSDOS fs support VFAT (Windows-95) fs support(936) Default codepage for FAT (cp936) Default iocharset for FAT启动之后插入u盘显示rootFriendlyARM /# usb 1-1.2: new full speed USB device using s3c2410-ohci and address 3usb 1-1.2: New USB device found, idVendor=1043, idProduct=8012usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0usb 1-1.2: Product: USB Flash Driveusb 1-1.2: Manufacturer: Genericuba: uba4挂载 mount /dev/uba4 /mnt后即能看到u盘里的数据了二、说说usb摄像头的和usb-wifi的支持吧，这两个东西得看你的设备是什么芯片，先说usb摄像头吧，关于摄像头的驱动驱动配置比较简单，只是关于驱动接口有两种版本，分别是V4L和V4L2，从2.6以后以后有了V4L2，我的linux2.6.38已经看不到关于v4l支持了，在linux的版本中我们还能看到中有Video For linux API 1的支持，但38的版本却看不到了，所以 像gspcav1-20071224.tar.gz这样的v4l接口的驱动就加不进去了,而很多V4l接口的usb测试程序也就用不了了，网上很少有V4l2的测试程序，所以友善也就没有开源的他的USB摄像头程序了（个人理解，不知是否正确）既然这样我们就学友善的，按V4l2的来配置吧我的摄像头芯片是sunplus凌阳的SPCA2000C的，支持UVC，支持UVC的就可以不用管是什么芯片了，选上一个就行Device Drivers- Multimedia support- Video For Linux* Video capture adapters- * V4L USB devices- USB Video Class (UVC)选上这个就行了make zImage后启动，插上usb摄像头，显示rootFriendlyARM /# usb 1-1.1: new full speed USB device using s3c2410-ohci and address 4usb 1-1.1: New USB device found, idVendor=04fc, idProduct=2003usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3usb 1-1.1: Product: Sunplus Camerausb 1-1.1: Manufacturer: Sunplus Camerausb 1-1.1: SerialNumber: CN0316-MM00-OV03-VH-R61.01.00uvcvideo: Found UVC 1.00 device Sunplus Camera (04fc:2003)input: Sunplus Camera as /devices/platform/s3c2410-ohci/usb1/1-1/1-1.1/1-1.1:1.0/input/input1在/dev/多了个video0，测试的话用mjpg-streamer就能够测试了具体看友善光盘A中的 开发文档和教程中的 专题04 通过Web远程浏览并控制Mini6410上的摄像头此外，我还有个中星微的芯片是ZC0301的摄像头，它的配置是Device Drivers- Multimedia support- Video For Linux* Video capture adapters- GSPCA based webcams- ZC3XX USB Camera Drivermake zImage插上后显示rootFriendlyARM /# usb 1-1.1: USB disconnect, address 4usb 1-1.1: new full speed USB device using s3c2410-ohci and address 5usb 1-1.1: New USB device found, idVendor=0ac8, idProduct=301busb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0usb 1-1.1: Product: PC Camerausb 1-1.1: Manufacturer: Vimicro Corp.gspca: probing 0ac8:301bzc3xx: probe 2wr ov vga 0x0000zc3xx: probe sensor - 0011zc3xx: Find Sensor HV7131Rinput: zc3xx as /devices/platform/s3c2410-ohci/usb1/1-1/1-1.1/input/input2gspca: video0 created它采集到得数据直接是jpeg的，所以不能用mjpg-stream来测试，友善修改后mjpg-stream要求采集的数据是yuv货mjpg的，我找了个基于v4l2的测试程序，看/aokikyon/blog/item/6e4e622c3e6f9be18b13993f.html，它将采集到数据直接存到了jpeg文件里面见附件也行三、说说usb-wifi的驱动我的usb-wifi芯片是Ralink的RT2571WF，这个我是拆开看的，所以它的配置是- Wireless cfg80211 - wireless configuration API Generic IEEE 802.11 Networking Stack (mac80211)* Wireless LAN- Ralink driver support- Ralink rt2501/rt73 (USB) support然后make zImage后显示rootFriendlyARM /# usb 1-1.2: new full speed USB device using s3c2410-ohci and address 3usb 1-1.2: New USB device found, idVendor=148f, idProduct=2573usb 1-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0接着输入命令0.ifconfig wlan0 up1.列出区域内的无线网络iwlist wlan0 scan2.连接到网络iwconfig wlan0 essid MyHome key s:12345这个密码是无线路由的密码，如果没有就不用输入了。由于无线路由的密码形式有很多种，有wep和wpa什么的。我们用的事wep，所以在输入key后加个s。3.设置ip