MINI2440 USB驱动移植问题

在移植USB鼠标驱动的时候发现了如下问题：

（1）开发板参数：

开发板 : MINI2440

内核： linux - 2.6.32

(2) 插入USB鼠标之后出现如下错误：

# usb 1-1: new low speed USB device using s3c2410-ohci and address 2

usb 1-1: device descriptor read/64, error -62

usb 1-1: device descriptor read/64, error -62

usb 1-1: new low speed USB device using s3c2410-ohci and address 3

usb 1-1: device descriptor read/64, error -62

usb 1-1: device descriptor read/64, error -62

usb 1-1: new low speed USB device using s3c2410-ohci and address 4

usb 1-1: device not accepting address 4, error -62

usb 1-1: new low speed USB device using s3c2410-ohci and address 5

usb 1-1: device not accepting address 5, error -62

hub 1-0:1.0: unable to enumerate USB device on port 1

解决方法：

（1）使用Linux - 2.6.29 内核即可

（2）如果要继续使用Linux - 2.6.32 内核可以做如下修改

修改drivers/usb/host/ohci-s3c2410.c

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <plat/usb-control.h>

#define valid_port(idx) ((idx) == 1 || (idx) == 2)

#if 1

#include <mach/regs-clock.h>

unsigned long upllvalue = (0x78 << 12)|(0x02 << 4) | (0x03);

#endif

/* clock device associated with the hcd */

static struct clk *clk;

static struct clk *usb_clk;

/* forward definitions */

static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);

/* conversion functions */

static struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd)

{

return hcd->self.controller->platform_data;

}

static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd)

{

struct s3c2410_hcd_info *info = dev->dev.platform_data;

dev_dbg(&dev->dev, "s3c2410_start_hc:\n");

clk_enable(usb_clk);

mdelay(2); /* let the bus clock stabilise */

clk_enable(clk);

if (info != NULL) {

info->hcd = hcd;

info->report_oc = s3c2410_hcd_oc;

if (info->enable_oc != NULL) {

(info->enable_oc)(info, 1);

}

}

while(upllvalue != __raw_readl(S3C2410_UPLLCON))

{

__raw_writel(upllvalue ,S3C2410_UPLLCON);

mdelay(1);

}

}

加上红色的那两行即可

运行结果

插上USB鼠标后：开发板串口输出如下：

[root@FriendlyARM input]# usb 1-1: new low speed USB device using s3c2410-ohci and address 7

usb 1-1: New USB device found, idVendor=15d9, idProduct=0a4c

usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0

usb 1-1: Product: USB OPTICAL MOUSE

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

usb mouse founded!

拔出：

[root@FriendlyARM input]# usb 1-1: USB disconnect, address 9

usb mouse diconnected!