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Tiny6410 下的USB移植

終於做完usb的移植了,前前後後自己一共做了20幾個zImage,其中也發現了很多問題,所幸的是問題都已得到解決,有很多問題是關於make menuconfig的,有這樣那樣的選項沒有選上就會出現問題,以後要注意,還有就是網上的關於tiny6410的移植很少,還不全!

1、vi arch/arm/mach-s3c64xx/mach-mini6410.c

124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 clock\n");
+        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 menuconfig

Device Drivers  --->

    SCSI device support  --->
         <*> SCSI device support
         <*> SCSI disk support
         <*> SCSI generic support

    USB support
         <*>   Support for Host-side USB
         [*]     USB device filesystem (DEPRECATED)
        <*>   USB Monitor
        <*>   OHCI HCD support
        <*>   USB Mass Storage support

File systems  --->
    DOS/FAT/NT Filesystems  --->
           <*> MSDOS fs support                                               
            <*> VFAT (Windows-95) fs support                                  
          (936) Default codepage for FAT                                       

         (cp936) Default iocharset for FAT

 

 

問題1:

"usb device descriptor read/64, error -71"

linux-kernel/include/asm-generic/erron.h 可以發現是:#define EPROTO   71 /* Protocol error 協議錯誤*/

內核配置中添加:CONFIG_USB_EHCI_ROOT_HUB_TT=y 就可以了。

問題2:

U盤可以掛載但是只讀:

解決:

--- SCSI device support                                                                     │ │
│ │                      [*]   legacy /proc/scsi/ support                             


問題3:
不支持U盤裡面的中文名稱:
提示:NTFS-fs error (device uba1): ntfs_ucstonls(): Unicode name contains characters that cannot be converted to character set default. You might want to try to use the mount option nls=utf8.
解決:

--- Base native language support                                                            │ │
│ │                      (utf8) Default NLS Option    

問題4:

Linux Ubuntu 2.6.38-12-generic   對NTFS支持不好,導致掛載U盤後寫入東西相當的費勁,基本上是不能寫的,可能低版本的會好一些。

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