📄 linux-2_6_14下usb驱动移植心得 - luofuchong - it博客网.htm
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<DIV class=postTitle><A class=postTitle2 id=viewpost1_TitleUrl
href="http://www.cnitblog.com/luofuchong/archive/2007/01/24/22265.html">linux-2.6.14下USB驱动移植心得</A>
</DIV>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 171pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 19.0"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">USB</SPAN>
<SPAN
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">驱动移植心得<SPAN
lang=EN-US><BR></SPAN>一、代码修改<SPAN lang=EN-US><BR></SPAN>主要是按照这个贴来做：<SPAN
lang=EN-US><BR><A
href="http://www.hfrk.net/S3C2410/kaifa/063152202483252_37.htm"
target=_blank><SPAN
style="COLOR: #333333; TEXT-DECORATION: none; mso-bidi-font-size: 12.0pt; text-underline: none">http://www.hfrk.net/S3C2410/kaifa/063152202483252_37.htm</SPAN></A><BR></SPAN>我也看过其它不同版本的内核关于<SPAN
lang=EN-US>usb</SPAN>驱动的移植，移植方法几乎一样，只是修改的文件不同而已。上面的贴子有不少头文件没有例出来，以下是我按照以上贴子添加的代码（好像在很多论坛上包括头文件部分都显示不出来，在这里把<SPAN
lang=EN-US>include</SPAN>前面的<SPAN lang=EN-US>#</SPAN>给删了，希望有帮助）：<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">/*add
by lfc*/<BR></SPAN><SPAN
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">＃<SPAN
lang=EN-US>include <asm/arch/regs-clock.h><BR></SPAN>＃<SPAN
lang=EN-US>include <asm/arch/usb-control.h><BR></SPAN>＃<SPAN
lang=EN-US>include <linux/device.h><BR></SPAN>＃<SPAN lang=EN-US>include
<linux/delay.h><BR>/*end add*/ <o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">/**********************add
by lfc*************************************/<BR>static struct s<st1:chmetcnv
tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="3"
unitname="C" w:st="on">3c</st1:chmetcnv>2410_hcd_info usb_sbc2410_info =
{<BR> .port[0] =
{<BR> .flags =
S<st1:chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="False"
sourcevalue="3" unitname="C" w:st="on">3C</st1:chmetcnv>_HCDFLG_USED<BR>
}<BR>}; <o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">int
usb_sbc2410_init(void)<BR>{<BR>unsigned long upllvalue =
(0x78<<12)|(0x02<<4)|(0x03);<BR>printk("USB Control, (c) 2006
sbc2410\n");<BR>s<st1:chmetcnv tcsc="0" numbertype="1" negative="False"
hasspace="False" sourcevalue="3" unitname="C"
w:st="on">3c</st1:chmetcnv>_device_usb.dev.platform_data =
&usb_sbc2410_info;<BR>while(upllvalue!=__raw_readl(S<st1:chmetcnv tcsc="0"
numbertype="1" negative="False" hasspace="False" sourcevalue="3" unitname="C"
w:st="on">3C</st1:chmetcnv>2410_UPLLCON))<BR>{<BR>__raw_writel(upllvalue,S<st1:chmetcnv
tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="3"
unitname="C"
w:st="on">3C</st1:chmetcnv>2410_UPLLCON);<BR>mdelay(1);<BR>}<BR>return 0;<BR>}
<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">/***************************end
add**********************/ <o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">static
void __init smdk2410_map_io(void)<BR>{<BR>s<st1:chmetcnv tcsc="0" numbertype="1"
negative="False" hasspace="False" sourcevalue="3" unitname="C"
w:st="on">3c</st1:chmetcnv>24xx_init_io(smdk2410_iodesc,
ARRAY_SIZE(smdk2410_iodesc));<BR>s<st1:chmetcnv tcsc="0" numbertype="1"
negative="False" hasspace="False" sourcevalue="3" unitname="C"
w:st="on">3c</st1:chmetcnv>24xx_init_clocks(0);<BR>s<st1:chmetcnv tcsc="0"
numbertype="1" negative="False" hasspace="False" sourcevalue="3" unitname="C"
w:st="on">3c</st1:chmetcnv>24xx_init_uarts(smdk2410_uartcfgs,
ARRAY_SIZE(smdk2410_uartcfgs));<BR>s<st1:chmetcnv tcsc="0" numbertype="1"
negative="False" hasspace="False" sourcevalue="3" unitname="C"
w:st="on">3c</st1:chmetcnv>24xx_set_board(&smdk2410_board);<BR>/*************************add
by lfc****************************/<BR>
usb_sbc2410_init();<BR>/*************************end
add*******************************/<BR>} <o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">上面的修改其实也参考了这个牛贴一下，里面有大虾们对<SPAN
lang=EN-US>USB</SPAN>驱动移植的讨论，还不错：<SPAN lang=EN-US><BR><A
href="http://www.linuxforum.net/forum/showflat.php?Cat=&Board=embedded&Number=556915&page=0&view=collapsed&sb=5&o=0&fpart="
target=_blank><SPAN
style="COLOR: #333333; TEXT-DECORATION: none; text-underline: none">http://www.linuxforum.net/forum/showflat.php?Cat=&Board=embedded&Number=556915&page=0&view=collapsed&sb=5&o=0&fpart=</SPAN></A><o:p></o:p></SPAN></SPAN>
</P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">其实到了这里，要修改的代码已经修改完了，比添加<SPAN
lang=EN-US>Nand flash</SPAN>的支持修改的地方还要少<SPAN
lang=EN-US>^_^</SPAN>，不过我一直以为还没修改好，最后发现原来是没配置好<SPAN lang=EN-US>~_~
<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">二、内核配置<SPAN
lang=EN-US><BR></SPAN>下面说一下郁闷了我好一阵子的内核配置（支持<SPAN
lang=EN-US>USB</SPAN>）问题，这个就比<SPAN lang=EN-US>Nand flash</SPAN>的配置要复杂多了。<SPAN
lang=EN-US><BR></SPAN>１、让内核支持热插拔<SPAN lang=EN-US><BR></SPAN>│<SPAN lang=EN-US>
General setup
---> <BR> </SPAN>│ │<SPAN lang=EN-US>[*] Support for
hot-pluggable devices <o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: #555555; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">２、<SPAN
lang=EN-US>USB</SPAN>驱动设置，可能有些不选也行，不过没时间去试，至于为什么要选这些选项的话可以看一下这个贴（<SPAN
lang=EN-US>Linux</SPAN>下的硬件驱动——<SPAN lang=EN-US>USB</SPAN>设备）：<SPAN
lang=EN-US><BR><A
href="http://www-128.ibm.com/developerworks/cn/linux/l-usb/index1.html"
target=_blank><SPAN
style="COLOR: #333333; TEXT-DECORATION: none; text-underline: none">http://www-128.ibm.com/developerworks/cn/linux/l-usb/index1.html</SPAN></A><o:p></o:p></SPAN></SPAN>
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