Hi all,
I'm currently writing a driver for some Carry USB
CompactFlash/SmartMedia/MemoryStick Card readers (www.carry.com.tw,
USB-Vendor 0x7CC). I have some doc's under NDA and the CompactFlash part is
already working quite nicely under 2.4.2.
Now I'm doing the SSFDC stuff. Of course I could just copy sddr09 and
fudge in the differences USB protocol stuff, but I would prefer to transfer
all the SSFDC-things into a separate ssfdc_mgr.c which could be used by all
SSFDC devices, regardless of the bus/device there connected to. An of
course we're still missing write-access ?
Now:
* does sddr09.c work with 1&2 MB Cards ?
These cards would show up as 256bytes/sector devices to the scsi layer ?
From all specs/docs I've seen, one should really hide this detail from
other layers ?
* do we really need a full two-way pba<-->lba mapping for read-only ?
SSFDC Block 0 (not Page/Sector 0 !) can't contain any user data anyway
(always card info there).
for write-access we definitely need them: finding free blocks,...
My plans for the ssfdc_mgr are something like:
struct ssfdc_abstract_manager {
void *connected_via_device; // for read/write calls
int vendorID,deviceID;
ssfdc_geometry geo;
int *lba2pba;
// Functions to read/write/copy complete 256+8/512+16
sectors (data+redundancy)
//
int (*read_raw_sector_func)(ssfdc_abstract_manager *mgr,int
block,int page,char *data,int size);
int (*write_raw_sector_func)(ssfdc_abstract_manager *mgr,int
block,int page,char *data,int size);
int (*copy_raw_sector_func)(ssfdc_abstract_manager *mgr,int
sourceblock,int sourcepage,int destblock);
// Erase a block after it's been copied somewhere else..
//
int (*erase_block_func)(ssfdc_abstract_manager *mgr,int block);
// Read data only or redundancy only.
//
// Multiple sectors ok, but don't cross block boundarys.
//
int (*read_data_func)(ssfdc_abstract_manager *mgr,int
block,int page,char *data,int size);
int (*read_redundancy_func)(ssfdc_abstract_manager *mgr,int
block,int page,char *data,int size);
};
I'm not familiar with the SCM commands for writing, therefor: will this
match the SCM Command-set ?
I remember Matt asking about this in some other groups: was this your idea ?
Can we use the SMIL stuff published by Toshiba/SSFDC (see
http://www.ssfdc.or.jp/english/smil/down.htm) ?
I guess not.
sda
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
http://lists.sourceforge.net/lists/listinfo/linux-usb-devel
