minix/drivers/usb_storage/README.txt
Kees Jongenburger dfb2b8398d usb:adding usb mass storage driver.
Change-Id: I9e431d56eddfeec21413c290b2fa7ad35b566f6b

http://gerrit.minix3.org/#/c/2690/
2014-07-28 17:05:39 +02:00

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* INFORMATION: *
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README file for "USB Mass Storage driver" that uses DDEkit and libblockdriver.
created march-april 2014, JPEmbedded (info@jpembedded.eu)
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* KNOWN LIMITATIONS: *
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-Hardcoded interface number for bulk-only reset.
-Hardcoded configuration number for simple enumeration.
-Call to ddekit_minix_create_msg_q in _ddekit_usb_thread uses base that
overlaps that of blockdriver's (in mass_storage_task) so initialization
must be done in fixed order.
-Some of DDEKit's functions are declared in source files as they are missing
from headers.
-DDEKit has 'init' but no 'deinit' call, so memory is spilled.
-Hardcoded geometry.
-LUN always set to 0.
-SIGTERM handler uses exit instead of DDEkit semaphores.
-mass_storage.conf taken from dde-linux26-usb-drivers.
-Subpartitioning does not seem to work.
-Type ddekit_usb_dev is not defined in any header file but two variants of it
should exist (client and server).
-Magic number in URB setup buffer assignment as there is no header for that
(like usb_ch9.h for descriptors).