2440/2410上将usb device改成usb host

-ENOMEM;

goto fail;

}

hub->status = kmalloc(sizeof(*hub->status), GFP_KERNEL);

if (!hub->status) {

message = "cant kmalloc hub status buffer";

ret = -ENOMEM;

goto fail;

}

mutex_init(&hub->status_mutex);

hub->descriptor = kmalloc(sizeof(*hub->descriptor), GFP_KERNEL);

if (!hub->descriptor) {

message = "cant kmalloc hub descriptor";

ret = -ENOMEM;

goto fail;

}

/* Request the entire hub descriptor.

* hub->descriptor can handle USB_MAXCHILDREN ports,

* but the hub can/will return fewer bytes here.

*/

ret = get_hub_descriptor(hdev, hub->descriptor,

sizeof(*hub->descriptor));

if (ret < 0) {

message = "cant read hub descriptor";

goto fail;

} else if (hub->descriptor->bNbrPorts > USB_MAXCHILDREN) {

message = "hub has too many ports!";

ret = -ENODEV;

goto fail;

}

/********************************************/

/*add by hiboy */

#ifdef CONFIG_ARCH_S3C2410

if ((hdev->devnum == 1) // Root Hub

&& hub->descriptor->bNbrPorts > CONFIG_MAX_ROOT_PORTS) {

int j;

for (j=hub->descriptor->bNbrPorts-1; j>=0; j--) {

printk("port #%d ", j);

if (j > CONFIG_MAX_ROOT_PORTS-1) {

printk("suspened!\n");

} else {

printk("alived!\n");

}

}

hub->descriptor->bNbrPorts = CONFIG_MAX_ROOT_PORTS;

}

#endif

/*********************************************/

第二篇：

是由于MISCCR寄存器没有正确设置的缘故，我在mach-2410.c中增加了设置MISCCR寄存器的内容，HOST0就可以正常使用了

/*add by seigpao*/

int usb_seigpao_init(void)

{

unsigned long upllvalue;

unsigned long misccr;

//设置UPLLCON

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

__raw_writel(upllvalue,S3C2410_UPLLCON);

//设置MISCCR

misccr = __raw_readl(S3C2410_MISCCR);

misccr |= S3C2410_MISCCR_USBHOST;

misccr &= ~(S3C2410_MISCCR_USBSUSPND0 | S3C2410_MISCCR_USBSUSPND1);

__raw_writel(misccr,S3C2410_MISCCR);

return 1;

}

/* end by seigpao */

static void __init smdk2410_map_io(void)

{

s3c24xx_init_io(smdk2410_iodesc, ARRAY_SIZE(smdk2410_iodesc));

s3c24xx_init_clocks(0);

s3c24xx_init_uarts(smdk2410_uartcfgs, ARRAY_SIZE(smdk2410_uartcfgs));

s3c24xx_set_board(&smdk2410_board);

/*add by seigpao*/

//设置2410触摸屏

set_s3c2410ts_info(&sbc2410_ts_cfg);

//设置USB相关寄存器

usb_seigpao_init();

/* end by seigpao */

}

不知道为什么会有第二篇，感觉不适合，所以又重网上找了另一篇文章。

修改ohci-s3c2440.c文件（含头文件）：

#include

#include

#include

/*add here*/

#include

#include

#include

#include

/*end here*/

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

/*add here*/

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

{

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

unsigned long misccr; //add misccr

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

while (upllvalue != __raw_readl(S3C2410_UPLLCON)) //setup UPLLCON

{

__raw_writel(upllvalue, S3C2410_UPLLCON);

mdelay(1);

}

misccr = __raw_readl(S3C2410_MISCCR); //MISCCR

misccr |= S3C2410_MISCCR_USBHOST;

misccr&=~(S3C2410_MISCCR_USBSUSPND0|S3C2410_MISCCR_USBSUSPND1);

__raw_writel(misccr,S3C2410_MISCCR);

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

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);

}

}

}

使用了这篇文章的改动。头文件位置可能根据内核不同做相应改动。我的2.6.29内核中的regs-clock.h和regs-gpio.h是在arch\arm\mach-s3c2410\include\mach中。我拷贝两个头文件到本地drivers/usb/host/，include 变成""。

然后make zImage,之后Kconfig会重新选择，

USB support (USB_SUPPORT) [Y/n/?] y

Support for Host-side USB (USB) [Y/n/m/?] y

USB verbose debug messages (USB_DEBUG) [N/y/?] n

USB announce new devices (USB_ANNOUNCE_NEW_DEVICES) [Y/n/?] y

*

* Miscellaneous USB options

*

USB device filesystem (USB_DEVICEFS) [Y/n/?] y

USB device class-de