proting IDE driver for uclinux/linux

tommywgt

我在Xilinx FPGA(EDK8.2)引用了MicroBlaze 32 bits RISC CPU, 可以RUN uclinux, 現在我又設計了一個非標準的IDE, 我自己寫個程式去R/W HD, 400G的也沒問題, 我也寫了一個FAT32 file system透過FAT32的LIB我所做的檔案操作, 使得HD接到WINDOWS也可以RUN的很正常. 但是問題來了, 這些自己寫的HD LIB無法跟uclinux KERNEL結合, 以致於無法直接跟系統資源結合, 也無法在VFS內mount這個device?
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有人能夠清楚的詳列在LINUX下porting IDE driver的步驟嗎?

tommywgt

這一段是說明如何用ata driver改成sata, 照道理來講就是改drivers/ide這一段的code就對了.
有人能再補充更多的嗎?
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Driver Overview: Linux kernels have two ATA ("IDE") driver sets:

6 u/ e& b# G: @7 `, f8 q"drivers/ide": This is the traditional ATA driver set, maintained by Bartlomiej Zolnierkiewicz (before that, Andre Hedrick). Contrary to popular belief, it includes low-level drivers for many common SATA chipsets.
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Optionally, on top of drivers/ide block-device (generic mass storage access) drivers, one can load drivers to provide software-level suport for BIOS services enabling various types of manufacturer-specific software RAID (called "fakeraid", below):

For 2.4 kernels, Linux's software-RAID (fakeraid) driver collection is called "ataraid", which has subdrivers for the various manufacturers' different software RAID schemes. Using ataraid results in your partitions being addressed using a /dev/ataraid/d0p1 (etc.) device-naming convention. Note: Support greatly improved circa-2.4.23.
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For 2.6 kernels, Linux's software-RAID (fakeraid) driver collection is called "dmraid" (Device Mapper RAID). So far (Sept 2004), Promise Fasttrack, HighPoint 37X, Intel ICH5/6, LSI, and SiI 3112A/Medley are supported: http://tienstra4.flatnet.tudelft.nl/~gerte/gen2dmraid/

I'm pretty sure manufacturers' proprietary drivers, where available, are designed to fit the above framework.

& }  j( \1 A& b1 l, N"libata": This is the newer ATA driver set for selected SATA chipsets only, maintained by Jeff Garzik, leveraging the kernel's well-tested SCSI layer. Garzik developed it in the 2.6 kernel series. 2.4 support was available only with a backported patch until libata's inclusion in 2.4.27 and later.

libata causes each SATA port appear as a new SCSI bus. There are individual low-level drivers for the individual SATA chipsets, e.g., ahci, ata_adma, ata_piix, sata_nv, sata_promise, sata_sil, sata_sx4, sata_svw, sata_via, sata_vsc.

tommywgt

另外這有二個很重要的網站
www.t10.org SCSI
' n& E: P- ]6 B: Awww.t13.org ATAPI

我在design HD controller時就是根據這二個網站資料的

kevin

我想你的問題是如何寫 Uclinux ide/ATA 的 driver.
- _( i  F9 ]2 j6 @. X! X) R$ r# _: \可以參考O'Reilly "Linux Device Drivers" book.
1 ~, \) g( m4 U$ C: N' hcode example 在 http://examples.oreilly.com/linuxdrive3/

tommywgt

好巧...這本書我有也...

) g' k. M, ^2 x4 c6 Y  o* u不過還是謝了

' i1 I6 J" y  x" S大大願意在這跟大家分享的話論壇的後進都會感謝你的...

tommywgt

沒人回也...我自己推一下好了, 不然只好找時間自己回了...鳴

windflowerz

我隻能幫妳頂一下，非常抱歉，幫不暸忙哦

jacky002

因為你是用uCLinux，所以我首先會問你有沒有將MMU的設定關掉，在我記憶中uCLinux是不支援MMU的。
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其次，你是用ATAPI或是SCSI的driver layer去寫這個driver的。建議Driver path最好還是使用SCSI會比較好，其實底層都類似，只不過SCSI再上層多做了一層，轉了一層SCSI command，也補強之前ATAPI的部分不足。

/ {, e! P! Q0 g2 D, i4 Z$ ^給你參考，希望對你有所幫助。

olduncle

除了看書之外,最實際的方法就是參考别家的Source code
Linux的源碼就有很可供參考,不管是legacy IDE或是掛在SCSI下的libata
看個2~3隻driver,你就會清楚ATA的interface需要哪些structure及private function point.
6 i1 E9 l  r& b: e7 i而且Lnux本身就支援許多Filesystem,除非你是要hack filesystem,否則只要porting driver就夠了。

olduncle

除了看書之外,最實際的方法就是參考别家的Source code
* B1 ?" [1 N( F3 F1 x$ }, ZLinux的源碼就有很可供參考,不管是legacy IDE或是掛在SCSI下的libata
看個2~3隻driver,你就會清楚ATA的interface需要哪些structure及private function point.
$ W) z1 `8 R8 X0 H4 L" o# ]* M" R5 ?而且Lnux本身就支援許多Filesystem,除非你是要hack filesystem,否則只要porting driver就夠了。