Hi, I'm working on a sd/mmc driver. The controller has a BLKLEN setting, however here is no register to set block_count setting. The datasheet says for Multi-Block Read/Write: host needs to stop controller manually by setting STPCMD to 1 when all data is received/transmitted. Host also needs to start CMD12 on the bus to stop the card. The datasheet does not mention the limitation on block_count.
So my question is how to determinate max_req_size and max_blk_count settings in driver since the controller only has a BLKLEN setting in register. Yet another question is: I got some messages while copying file to sd card: [ 35.602813] mmcblk0: error -5 transferring data, sector 11008, nr 64, cmd response 0x900, card status 0xc00 [ 35.639143] end_request: I/O error, dev mmcblk0, sector 11008 [ 35.645170] end_request: I/O error, dev mmcblk0, sector 11016 [ 35.651690] end_request: I/O error, dev mmcblk0, sector 11024 [ 35.658095] end_request: I/O error, dev mmcblk0, sector 11032 [ 35.664090] end_request: I/O error, dev mmcblk0, sector 11040 [ 35.670570] end_request: I/O error, dev mmcblk0, sector 11048 [ 35.676541] end_request: I/O error, dev mmcblk0, sector 11056 [ 35.682997] end_request: I/O error, dev mmcblk0, sector 11064 The copy looks success. (Destination file size looks ok. And if I copy an executable file, I can execute it. So I think the copy is success.) But I'm still have no idea how to debug such I/O error now. Any comments/hits to debug such issue? Thanks, Axel -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
