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@@ -1,3656 +0,0 @@
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-/*
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- * file_storage.c -- File-backed USB Storage Gadget, for USB development
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- *
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- * Copyright (C) 2003-2008 Alan Stern
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- * All rights reserved.
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- *
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- * Redistribution and use in source and binary forms, with or without
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- * modification, are permitted provided that the following conditions
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- * are met:
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- * 1. Redistributions of source code must retain the above copyright
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- * notice, this list of conditions, and the following disclaimer,
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- * without modification.
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- * 2. Redistributions in binary form must reproduce the above copyright
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- * notice, this list of conditions and the following disclaimer in the
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- * documentation and/or other materials provided with the distribution.
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- * 3. The names of the above-listed copyright holders may not be used
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- * to endorse or promote products derived from this software without
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- * specific prior written permission.
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- *
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- * ALTERNATIVELY, this software may be distributed under the terms of the
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- * GNU General Public License ("GPL") as published by the Free Software
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- * Foundation, either version 2 of that License or (at your option) any
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- * later version.
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- *
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- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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- */
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-
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-
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-/*
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- * The File-backed Storage Gadget acts as a USB Mass Storage device,
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- * appearing to the host as a disk drive or as a CD-ROM drive. In addition
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- * to providing an example of a genuinely useful gadget driver for a USB
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- * device, it also illustrates a technique of double-buffering for increased
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- * throughput. Last but not least, it gives an easy way to probe the
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- * behavior of the Mass Storage drivers in a USB host.
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- *
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- * Backing storage is provided by a regular file or a block device, specified
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- * by the "file" module parameter. Access can be limited to read-only by
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- * setting the optional "ro" module parameter. (For CD-ROM emulation,
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- * access is always read-only.) The gadget will indicate that it has
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- * removable media if the optional "removable" module parameter is set.
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- *
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- * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI),
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- * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected
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- * by the optional "transport" module parameter. It also supports the
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- * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03),
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- * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by
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- * the optional "protocol" module parameter. In addition, the default
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- * Vendor ID, Product ID, release number and serial number can be overridden.
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- *
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- * There is support for multiple logical units (LUNs), each of which has
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- * its own backing file. The number of LUNs can be set using the optional
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- * "luns" module parameter (anywhere from 1 to 8), and the corresponding
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- * files are specified using comma-separated lists for "file" and "ro".
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- * The default number of LUNs is taken from the number of "file" elements;
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- * it is 1 if "file" is not given. If "removable" is not set then a backing
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- * file must be specified for each LUN. If it is set, then an unspecified
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- * or empty backing filename means the LUN's medium is not loaded. Ideally
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- * each LUN would be settable independently as a disk drive or a CD-ROM
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- * drive, but currently all LUNs have to be the same type. The CD-ROM
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- * emulation includes a single data track and no audio tracks; hence there
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- * need be only one backing file per LUN.
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- *
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- * Requirements are modest; only a bulk-in and a bulk-out endpoint are
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- * needed (an interrupt-out endpoint is also needed for CBI). The memory
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- * requirement amounts to two 16K buffers, size configurable by a parameter.
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- * Support is included for both full-speed and high-speed operation.
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- *
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- * Note that the driver is slightly non-portable in that it assumes a
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- * single memory/DMA buffer will be useable for bulk-in, bulk-out, and
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- * interrupt-in endpoints. With most device controllers this isn't an
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- * issue, but there may be some with hardware restrictions that prevent
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- * a buffer from being used by more than one endpoint.
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- *
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- * Module options:
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- *
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- * file=filename[,filename...]
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- * Required if "removable" is not set, names of
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- * the files or block devices used for
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- * backing storage
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- * serial=HHHH... Required serial number (string of hex chars)
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- * ro=b[,b...] Default false, booleans for read-only access
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- * removable Default false, boolean for removable media
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- * luns=N Default N = number of filenames, number of
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- * LUNs to support
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- * nofua=b[,b...] Default false, booleans for ignore FUA flag
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- * in SCSI WRITE(10,12) commands
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- * stall Default determined according to the type of
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- * USB device controller (usually true),
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- * boolean to permit the driver to halt
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- * bulk endpoints
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- * cdrom Default false, boolean for whether to emulate
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- * a CD-ROM drive
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- * transport=XXX Default BBB, transport name (CB, CBI, or BBB)
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- * protocol=YYY Default SCSI, protocol name (RBC, 8020 or
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- * ATAPI, QIC, UFI, 8070, or SCSI;
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- * also 1 - 6)
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- * vendor=0xVVVV Default 0x0525 (NetChip), USB Vendor ID
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- * product=0xPPPP Default 0xa4a5 (FSG), USB Product ID
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- * release=0xRRRR Override the USB release number (bcdDevice)
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- * buflen=N Default N=16384, buffer size used (will be
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- * rounded down to a multiple of
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- * PAGE_CACHE_SIZE)
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- *
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- * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "serial", "ro",
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- * "removable", "luns", "nofua", "stall", and "cdrom" options are available;
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- * default values are used for everything else.
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- *
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- * The pathnames of the backing files and the ro settings are available in
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- * the attribute files "file", "nofua", and "ro" in the lun<n> subdirectory of
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- * the gadget's sysfs directory. If the "removable" option is set, writing to
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- * these files will simulate ejecting/loading the medium (writing an empty
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- * line means eject) and adjusting a write-enable tab. Changes to the ro
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- * setting are not allowed when the medium is loaded or if CD-ROM emulation
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- * is being used.
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- *
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- * This gadget driver is heavily based on "Gadget Zero" by David Brownell.
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- * The driver's SCSI command interface was based on the "Information
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- * technology - Small Computer System Interface - 2" document from
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- * X3T9.2 Project 375D, Revision 10L, 7-SEP-93, available at
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- * <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>. The single exception
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- * is opcode 0x23 (READ FORMAT CAPACITIES), which was based on the
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- * "Universal Serial Bus Mass Storage Class UFI Command Specification"
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- * document, Revision 1.0, December 14, 1998, available at
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- * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>.
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- */
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-
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-
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-/*
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- * Driver Design
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- *
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- * The FSG driver is fairly straightforward. There is a main kernel
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- * thread that handles most of the work. Interrupt routines field
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- * callbacks from the controller driver: bulk- and interrupt-request
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- * completion notifications, endpoint-0 events, and disconnect events.
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- * Completion events are passed to the main thread by wakeup calls. Many
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- * ep0 requests are handled at interrupt time, but SetInterface,
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- * SetConfiguration, and device reset requests are forwarded to the
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- * thread in the form of "exceptions" using SIGUSR1 signals (since they
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- * should interrupt any ongoing file I/O operations).
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- *
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- * The thread's main routine implements the standard command/data/status
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- * parts of a SCSI interaction. It and its subroutines are full of tests
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- * for pending signals/exceptions -- all this polling is necessary since
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- * the kernel has no setjmp/longjmp equivalents. (Maybe this is an
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- * indication that the driver really wants to be running in userspace.)
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- * An important point is that so long as the thread is alive it keeps an
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- * open reference to the backing file. This will prevent unmounting
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- * the backing file's underlying filesystem and could cause problems
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- * during system shutdown, for example. To prevent such problems, the
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- * thread catches INT, TERM, and KILL signals and converts them into
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- * an EXIT exception.
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- *
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- * In normal operation the main thread is started during the gadget's
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- * fsg_bind() callback and stopped during fsg_unbind(). But it can also
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- * exit when it receives a signal, and there's no point leaving the
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- * gadget running when the thread is dead. So just before the thread
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- * exits, it deregisters the gadget driver. This makes things a little
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- * tricky: The driver is deregistered at two places, and the exiting
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- * thread can indirectly call fsg_unbind() which in turn can tell the
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- * thread to exit. The first problem is resolved through the use of the
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- * REGISTERED atomic bitflag; the driver will only be deregistered once.
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- * The second problem is resolved by having fsg_unbind() check
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- * fsg->state; it won't try to stop the thread if the state is already
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- * FSG_STATE_TERMINATED.
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- *
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- * To provide maximum throughput, the driver uses a circular pipeline of
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- * buffer heads (struct fsg_buffhd). In principle the pipeline can be
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- * arbitrarily long; in practice the benefits don't justify having more
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- * than 2 stages (i.e., double buffering). But it helps to think of the
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- * pipeline as being a long one. Each buffer head contains a bulk-in and
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- * a bulk-out request pointer (since the buffer can be used for both
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- * output and input -- directions always are given from the host's
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- * point of view) as well as a pointer to the buffer and various state
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- * variables.
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- *
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- * Use of the pipeline follows a simple protocol. There is a variable
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- * (fsg->next_buffhd_to_fill) that points to the next buffer head to use.
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- * At any time that buffer head may still be in use from an earlier
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- * request, so each buffer head has a state variable indicating whether
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- * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the
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- * buffer head to be EMPTY, filling the buffer either by file I/O or by
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- * USB I/O (during which the buffer head is BUSY), and marking the buffer
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- * head FULL when the I/O is complete. Then the buffer will be emptied
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- * (again possibly by USB I/O, during which it is marked BUSY) and
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- * finally marked EMPTY again (possibly by a completion routine).
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- *
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- * A module parameter tells the driver to avoid stalling the bulk
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- * endpoints wherever the transport specification allows. This is
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- * necessary for some UDCs like the SuperH, which cannot reliably clear a
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- * halt on a bulk endpoint. However, under certain circumstances the
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- * Bulk-only specification requires a stall. In such cases the driver
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- * will halt the endpoint and set a flag indicating that it should clear
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- * the halt in software during the next device reset. Hopefully this
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- * will permit everything to work correctly. Furthermore, although the
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- * specification allows the bulk-out endpoint to halt when the host sends
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- * too much data, implementing this would cause an unavoidable race.
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- * The driver will always use the "no-stall" approach for OUT transfers.
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- *
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- * One subtle point concerns sending status-stage responses for ep0
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- * requests. Some of these requests, such as device reset, can involve
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- * interrupting an ongoing file I/O operation, which might take an
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- * arbitrarily long time. During that delay the host might give up on
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- * the original ep0 request and issue a new one. When that happens the
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- * driver should not notify the host about completion of the original
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- * request, as the host will no longer be waiting for it. So the driver
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- * assigns to each ep0 request a unique tag, and it keeps track of the
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- * tag value of the request associated with a long-running exception
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- * (device-reset, interface-change, or configuration-change). When the
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- * exception handler is finished, the status-stage response is submitted
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- * only if the current ep0 request tag is equal to the exception request
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- * tag. Thus only the most recently received ep0 request will get a
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- * status-stage response.
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- *
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- * Warning: This driver source file is too long. It ought to be split up
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- * into a header file plus about 3 separate .c files, to handle the details
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- * of the Gadget, USB Mass Storage, and SCSI protocols.
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- */
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-
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-
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-/* #define VERBOSE_DEBUG */
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-/* #define DUMP_MSGS */
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-
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-
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-#include <linux/blkdev.h>
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-#include <linux/completion.h>
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-#include <linux/dcache.h>
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-#include <linux/delay.h>
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-#include <linux/device.h>
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-#include <linux/fcntl.h>
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-#include <linux/file.h>
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-#include <linux/fs.h>
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-#include <linux/kref.h>
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-#include <linux/kthread.h>
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-#include <linux/limits.h>
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-#include <linux/module.h>
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-#include <linux/rwsem.h>
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-#include <linux/slab.h>
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-#include <linux/spinlock.h>
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-#include <linux/string.h>
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-#include <linux/freezer.h>
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-#include <linux/utsname.h>
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-
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-#include <linux/usb/composite.h>
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-#include <linux/usb/ch9.h>
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-#include <linux/usb/gadget.h>
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-
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-#include "gadget_chips.h"
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-
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-#define DRIVER_DESC "File-backed Storage Gadget"
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-#define DRIVER_NAME "g_file_storage"
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-#define DRIVER_VERSION "1 September 2010"
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-
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-static char fsg_string_manufacturer[64];
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-static const char fsg_string_product[] = DRIVER_DESC;
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-static const char fsg_string_config[] = "Self-powered";
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-static const char fsg_string_interface[] = "Mass Storage";
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-
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-
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-#include "storage_common.c"
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-
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-
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-MODULE_DESCRIPTION(DRIVER_DESC);
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-MODULE_AUTHOR("Alan Stern");
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-MODULE_LICENSE("Dual BSD/GPL");
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-
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-/*
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- * This driver assumes self-powered hardware and has no way for users to
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- * trigger remote wakeup. It uses autoconfiguration to select endpoints
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- * and endpoint addresses.
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- */
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-
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-
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-/*-------------------------------------------------------------------------*/
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-
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-
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-/* Encapsulate the module parameter settings */
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-
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-static struct {
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- char *file[FSG_MAX_LUNS];
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- char *serial;
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- bool ro[FSG_MAX_LUNS];
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- bool nofua[FSG_MAX_LUNS];
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- unsigned int num_filenames;
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- unsigned int num_ros;
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- unsigned int num_nofuas;
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- unsigned int nluns;
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-
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- bool removable;
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- bool can_stall;
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- bool cdrom;
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-
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- char *transport_parm;
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- char *protocol_parm;
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- unsigned short vendor;
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- unsigned short product;
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- unsigned short release;
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- unsigned int buflen;
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-
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- int transport_type;
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- char *transport_name;
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- int protocol_type;
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- char *protocol_name;
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-
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-} mod_data = { // Default values
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- .transport_parm = "BBB",
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- .protocol_parm = "SCSI",
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- .removable = 0,
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- .can_stall = 1,
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- .cdrom = 0,
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- .vendor = FSG_VENDOR_ID,
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- .product = FSG_PRODUCT_ID,
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- .release = 0xffff, // Use controller chip type
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- .buflen = 16384,
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- };
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-
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-
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-module_param_array_named(file, mod_data.file, charp, &mod_data.num_filenames,
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- S_IRUGO);
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-MODULE_PARM_DESC(file, "names of backing files or devices");
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-
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-module_param_named(serial, mod_data.serial, charp, S_IRUGO);
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-MODULE_PARM_DESC(serial, "USB serial number");
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-
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-module_param_array_named(ro, mod_data.ro, bool, &mod_data.num_ros, S_IRUGO);
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-MODULE_PARM_DESC(ro, "true to force read-only");
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-
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-module_param_array_named(nofua, mod_data.nofua, bool, &mod_data.num_nofuas,
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- S_IRUGO);
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-MODULE_PARM_DESC(nofua, "true to ignore SCSI WRITE(10,12) FUA bit");
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-
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-module_param_named(luns, mod_data.nluns, uint, S_IRUGO);
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-MODULE_PARM_DESC(luns, "number of LUNs");
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-
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-module_param_named(removable, mod_data.removable, bool, S_IRUGO);
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-MODULE_PARM_DESC(removable, "true to simulate removable media");
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-
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-module_param_named(stall, mod_data.can_stall, bool, S_IRUGO);
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-MODULE_PARM_DESC(stall, "false to prevent bulk stalls");
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-
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-module_param_named(cdrom, mod_data.cdrom, bool, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(cdrom, "true to emulate cdrom instead of disk");
|
|
|
-
|
|
|
-/* In the non-TEST version, only the module parameters listed above
|
|
|
- * are available. */
|
|
|
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
|
|
|
-
|
|
|
-module_param_named(transport, mod_data.transport_parm, charp, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)");
|
|
|
-
|
|
|
-module_param_named(protocol, mod_data.protocol_parm, charp, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, "
|
|
|
- "8070, or SCSI)");
|
|
|
-
|
|
|
-module_param_named(vendor, mod_data.vendor, ushort, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(vendor, "USB Vendor ID");
|
|
|
-
|
|
|
-module_param_named(product, mod_data.product, ushort, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(product, "USB Product ID");
|
|
|
-
|
|
|
-module_param_named(release, mod_data.release, ushort, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(release, "USB release number");
|
|
|
-
|
|
|
-module_param_named(buflen, mod_data.buflen, uint, S_IRUGO);
|
|
|
-MODULE_PARM_DESC(buflen, "I/O buffer size");
|
|
|
-
|
|
|
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
- * These definitions will permit the compiler to avoid generating code for
|
|
|
- * parts of the driver that aren't used in the non-TEST version. Even gcc
|
|
|
- * can recognize when a test of a constant expression yields a dead code
|
|
|
- * path.
|
|
|
- */
|
|
|
-
|
|
|
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
|
|
|
-
|
|
|
-#define transport_is_bbb() (mod_data.transport_type == USB_PR_BULK)
|
|
|
-#define transport_is_cbi() (mod_data.transport_type == USB_PR_CBI)
|
|
|
-#define protocol_is_scsi() (mod_data.protocol_type == USB_SC_SCSI)
|
|
|
-
|
|
|
-#else
|
|
|
-
|
|
|
-#define transport_is_bbb() 1
|
|
|
-#define transport_is_cbi() 0
|
|
|
-#define protocol_is_scsi() 1
|
|
|
-
|
|
|
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-
|
|
|
-struct fsg_dev {
|
|
|
- /* lock protects: state, all the req_busy's, and cbbuf_cmnd */
|
|
|
- spinlock_t lock;
|
|
|
- struct usb_gadget *gadget;
|
|
|
-
|
|
|
- /* filesem protects: backing files in use */
|
|
|
- struct rw_semaphore filesem;
|
|
|
-
|
|
|
- /* reference counting: wait until all LUNs are released */
|
|
|
- struct kref ref;
|
|
|
-
|
|
|
- struct usb_ep *ep0; // Handy copy of gadget->ep0
|
|
|
- struct usb_request *ep0req; // For control responses
|
|
|
- unsigned int ep0_req_tag;
|
|
|
- const char *ep0req_name;
|
|
|
-
|
|
|
- struct usb_request *intreq; // For interrupt responses
|
|
|
- int intreq_busy;
|
|
|
- struct fsg_buffhd *intr_buffhd;
|
|
|
-
|
|
|
- unsigned int bulk_out_maxpacket;
|
|
|
- enum fsg_state state; // For exception handling
|
|
|
- unsigned int exception_req_tag;
|
|
|
-
|
|
|
- u8 config, new_config;
|
|
|
-
|
|
|
- unsigned int running : 1;
|
|
|
- unsigned int bulk_in_enabled : 1;
|
|
|
- unsigned int bulk_out_enabled : 1;
|
|
|
- unsigned int intr_in_enabled : 1;
|
|
|
- unsigned int phase_error : 1;
|
|
|
- unsigned int short_packet_received : 1;
|
|
|
- unsigned int bad_lun_okay : 1;
|
|
|
-
|
|
|
- unsigned long atomic_bitflags;
|
|
|
-#define REGISTERED 0
|
|
|
-#define IGNORE_BULK_OUT 1
|
|
|
-#define SUSPENDED 2
|
|
|
-
|
|
|
- struct usb_ep *bulk_in;
|
|
|
- struct usb_ep *bulk_out;
|
|
|
- struct usb_ep *intr_in;
|
|
|
-
|
|
|
- struct fsg_buffhd *next_buffhd_to_fill;
|
|
|
- struct fsg_buffhd *next_buffhd_to_drain;
|
|
|
-
|
|
|
- int thread_wakeup_needed;
|
|
|
- struct completion thread_notifier;
|
|
|
- struct task_struct *thread_task;
|
|
|
-
|
|
|
- int cmnd_size;
|
|
|
- u8 cmnd[MAX_COMMAND_SIZE];
|
|
|
- enum data_direction data_dir;
|
|
|
- u32 data_size;
|
|
|
- u32 data_size_from_cmnd;
|
|
|
- u32 tag;
|
|
|
- unsigned int lun;
|
|
|
- u32 residue;
|
|
|
- u32 usb_amount_left;
|
|
|
-
|
|
|
- /* The CB protocol offers no way for a host to know when a command
|
|
|
- * has completed. As a result the next command may arrive early,
|
|
|
- * and we will still have to handle it. For that reason we need
|
|
|
- * a buffer to store new commands when using CB (or CBI, which
|
|
|
- * does not oblige a host to wait for command completion either). */
|
|
|
- int cbbuf_cmnd_size;
|
|
|
- u8 cbbuf_cmnd[MAX_COMMAND_SIZE];
|
|
|
-
|
|
|
- unsigned int nluns;
|
|
|
- struct fsg_lun *luns;
|
|
|
- struct fsg_lun *curlun;
|
|
|
- /* Must be the last entry */
|
|
|
- struct fsg_buffhd buffhds[];
|
|
|
-};
|
|
|
-
|
|
|
-typedef void (*fsg_routine_t)(struct fsg_dev *);
|
|
|
-
|
|
|
-static int exception_in_progress(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- return (fsg->state > FSG_STATE_IDLE);
|
|
|
-}
|
|
|
-
|
|
|
-/* Make bulk-out requests be divisible by the maxpacket size */
|
|
|
-static void set_bulk_out_req_length(struct fsg_dev *fsg,
|
|
|
- struct fsg_buffhd *bh, unsigned int length)
|
|
|
-{
|
|
|
- unsigned int rem;
|
|
|
-
|
|
|
- bh->bulk_out_intended_length = length;
|
|
|
- rem = length % fsg->bulk_out_maxpacket;
|
|
|
- if (rem > 0)
|
|
|
- length += fsg->bulk_out_maxpacket - rem;
|
|
|
- bh->outreq->length = length;
|
|
|
-}
|
|
|
-
|
|
|
-static struct fsg_dev *the_fsg;
|
|
|
-static struct usb_gadget_driver fsg_driver;
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
|
|
|
-{
|
|
|
- const char *name;
|
|
|
-
|
|
|
- if (ep == fsg->bulk_in)
|
|
|
- name = "bulk-in";
|
|
|
- else if (ep == fsg->bulk_out)
|
|
|
- name = "bulk-out";
|
|
|
- else
|
|
|
- name = ep->name;
|
|
|
- DBG(fsg, "%s set halt\n", name);
|
|
|
- return usb_ep_set_halt(ep);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/*
|
|
|
- * DESCRIPTORS ... most are static, but strings and (full) configuration
|
|
|
- * descriptors are built on demand. Also the (static) config and interface
|
|
|
- * descriptors are adjusted during fsg_bind().
|
|
|
- */
|
|
|
-
|
|
|
-/* There is only one configuration. */
|
|
|
-#define CONFIG_VALUE 1
|
|
|
-
|
|
|
-static struct usb_device_descriptor
|
|
|
-device_desc = {
|
|
|
- .bLength = sizeof device_desc,
|
|
|
- .bDescriptorType = USB_DT_DEVICE,
|
|
|
-
|
|
|
- .bcdUSB = cpu_to_le16(0x0200),
|
|
|
- .bDeviceClass = USB_CLASS_PER_INTERFACE,
|
|
|
-
|
|
|
- /* The next three values can be overridden by module parameters */
|
|
|
- .idVendor = cpu_to_le16(FSG_VENDOR_ID),
|
|
|
- .idProduct = cpu_to_le16(FSG_PRODUCT_ID),
|
|
|
- .bcdDevice = cpu_to_le16(0xffff),
|
|
|
-
|
|
|
- .iManufacturer = FSG_STRING_MANUFACTURER,
|
|
|
- .iProduct = FSG_STRING_PRODUCT,
|
|
|
- .iSerialNumber = FSG_STRING_SERIAL,
|
|
|
- .bNumConfigurations = 1,
|
|
|
-};
|
|
|
-
|
|
|
-static struct usb_config_descriptor
|
|
|
-config_desc = {
|
|
|
- .bLength = sizeof config_desc,
|
|
|
- .bDescriptorType = USB_DT_CONFIG,
|
|
|
-
|
|
|
- /* wTotalLength computed by usb_gadget_config_buf() */
|
|
|
- .bNumInterfaces = 1,
|
|
|
- .bConfigurationValue = CONFIG_VALUE,
|
|
|
- .iConfiguration = FSG_STRING_CONFIG,
|
|
|
- .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
|
|
|
- .bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2,
|
|
|
-};
|
|
|
-
|
|
|
-
|
|
|
-static struct usb_qualifier_descriptor
|
|
|
-dev_qualifier = {
|
|
|
- .bLength = sizeof dev_qualifier,
|
|
|
- .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
|
|
|
-
|
|
|
- .bcdUSB = cpu_to_le16(0x0200),
|
|
|
- .bDeviceClass = USB_CLASS_PER_INTERFACE,
|
|
|
-
|
|
|
- .bNumConfigurations = 1,
|
|
|
-};
|
|
|
-
|
|
|
-static int populate_bos(struct fsg_dev *fsg, u8 *buf)
|
|
|
-{
|
|
|
- memcpy(buf, &fsg_bos_desc, USB_DT_BOS_SIZE);
|
|
|
- buf += USB_DT_BOS_SIZE;
|
|
|
-
|
|
|
- memcpy(buf, &fsg_ext_cap_desc, USB_DT_USB_EXT_CAP_SIZE);
|
|
|
- buf += USB_DT_USB_EXT_CAP_SIZE;
|
|
|
-
|
|
|
- memcpy(buf, &fsg_ss_cap_desc, USB_DT_USB_SS_CAP_SIZE);
|
|
|
-
|
|
|
- return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE
|
|
|
- + USB_DT_USB_EXT_CAP_SIZE;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Config descriptors must agree with the code that sets configurations
|
|
|
- * and with code managing interfaces and their altsettings. They must
|
|
|
- * also handle different speeds and other-speed requests.
|
|
|
- */
|
|
|
-static int populate_config_buf(struct usb_gadget *gadget,
|
|
|
- u8 *buf, u8 type, unsigned index)
|
|
|
-{
|
|
|
- enum usb_device_speed speed = gadget->speed;
|
|
|
- int len;
|
|
|
- const struct usb_descriptor_header **function;
|
|
|
-
|
|
|
- if (index > 0)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- if (gadget_is_dualspeed(gadget) && type == USB_DT_OTHER_SPEED_CONFIG)
|
|
|
- speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed;
|
|
|
- function = gadget_is_dualspeed(gadget) && speed == USB_SPEED_HIGH
|
|
|
- ? (const struct usb_descriptor_header **)fsg_hs_function
|
|
|
- : (const struct usb_descriptor_header **)fsg_fs_function;
|
|
|
-
|
|
|
- /* for now, don't advertise srp-only devices */
|
|
|
- if (!gadget_is_otg(gadget))
|
|
|
- function++;
|
|
|
-
|
|
|
- len = usb_gadget_config_buf(&config_desc, buf, EP0_BUFSIZE, function);
|
|
|
- ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
|
|
|
- return len;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* These routines may be called in process context or in_irq */
|
|
|
-
|
|
|
-/* Caller must hold fsg->lock */
|
|
|
-static void wakeup_thread(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- /* Tell the main thread that something has happened */
|
|
|
- fsg->thread_wakeup_needed = 1;
|
|
|
- if (fsg->thread_task)
|
|
|
- wake_up_process(fsg->thread_task);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state)
|
|
|
-{
|
|
|
- unsigned long flags;
|
|
|
-
|
|
|
- /* Do nothing if a higher-priority exception is already in progress.
|
|
|
- * If a lower-or-equal priority exception is in progress, preempt it
|
|
|
- * and notify the main thread by sending it a signal. */
|
|
|
- spin_lock_irqsave(&fsg->lock, flags);
|
|
|
- if (fsg->state <= new_state) {
|
|
|
- fsg->exception_req_tag = fsg->ep0_req_tag;
|
|
|
- fsg->state = new_state;
|
|
|
- if (fsg->thread_task)
|
|
|
- send_sig_info(SIGUSR1, SEND_SIG_FORCED,
|
|
|
- fsg->thread_task);
|
|
|
- }
|
|
|
- spin_unlock_irqrestore(&fsg->lock, flags);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* The disconnect callback and ep0 routines. These always run in_irq,
|
|
|
- * except that ep0_queue() is called in the main thread to acknowledge
|
|
|
- * completion of various requests: set config, set interface, and
|
|
|
- * Bulk-only device reset. */
|
|
|
-
|
|
|
-static void fsg_disconnect(struct usb_gadget *gadget)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = get_gadget_data(gadget);
|
|
|
-
|
|
|
- DBG(fsg, "disconnect or port reset\n");
|
|
|
- raise_exception(fsg, FSG_STATE_DISCONNECT);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int ep0_queue(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- int rc;
|
|
|
-
|
|
|
- rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC);
|
|
|
- if (rc != 0 && rc != -ESHUTDOWN) {
|
|
|
-
|
|
|
- /* We can't do much more than wait for a reset */
|
|
|
- WARNING(fsg, "error in submission: %s --> %d\n",
|
|
|
- fsg->ep0->name, rc);
|
|
|
- }
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-static void ep0_complete(struct usb_ep *ep, struct usb_request *req)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = ep->driver_data;
|
|
|
-
|
|
|
- if (req->actual > 0)
|
|
|
- dump_msg(fsg, fsg->ep0req_name, req->buf, req->actual);
|
|
|
- if (req->status || req->actual != req->length)
|
|
|
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
|
|
|
- req->status, req->actual, req->length);
|
|
|
- if (req->status == -ECONNRESET) // Request was cancelled
|
|
|
- usb_ep_fifo_flush(ep);
|
|
|
-
|
|
|
- if (req->status == 0 && req->context)
|
|
|
- ((fsg_routine_t) (req->context))(fsg);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* Bulk and interrupt endpoint completion handlers.
|
|
|
- * These always run in_irq. */
|
|
|
-
|
|
|
-static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = ep->driver_data;
|
|
|
- struct fsg_buffhd *bh = req->context;
|
|
|
-
|
|
|
- if (req->status || req->actual != req->length)
|
|
|
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
|
|
|
- req->status, req->actual, req->length);
|
|
|
- if (req->status == -ECONNRESET) // Request was cancelled
|
|
|
- usb_ep_fifo_flush(ep);
|
|
|
-
|
|
|
- /* Hold the lock while we update the request and buffer states */
|
|
|
- smp_wmb();
|
|
|
- spin_lock(&fsg->lock);
|
|
|
- bh->inreq_busy = 0;
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
- wakeup_thread(fsg);
|
|
|
- spin_unlock(&fsg->lock);
|
|
|
-}
|
|
|
-
|
|
|
-static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = ep->driver_data;
|
|
|
- struct fsg_buffhd *bh = req->context;
|
|
|
-
|
|
|
- dump_msg(fsg, "bulk-out", req->buf, req->actual);
|
|
|
- if (req->status || req->actual != bh->bulk_out_intended_length)
|
|
|
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
|
|
|
- req->status, req->actual,
|
|
|
- bh->bulk_out_intended_length);
|
|
|
- if (req->status == -ECONNRESET) // Request was cancelled
|
|
|
- usb_ep_fifo_flush(ep);
|
|
|
-
|
|
|
- /* Hold the lock while we update the request and buffer states */
|
|
|
- smp_wmb();
|
|
|
- spin_lock(&fsg->lock);
|
|
|
- bh->outreq_busy = 0;
|
|
|
- bh->state = BUF_STATE_FULL;
|
|
|
- wakeup_thread(fsg);
|
|
|
- spin_unlock(&fsg->lock);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
|
|
|
-static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = ep->driver_data;
|
|
|
- struct fsg_buffhd *bh = req->context;
|
|
|
-
|
|
|
- if (req->status || req->actual != req->length)
|
|
|
- DBG(fsg, "%s --> %d, %u/%u\n", __func__,
|
|
|
- req->status, req->actual, req->length);
|
|
|
- if (req->status == -ECONNRESET) // Request was cancelled
|
|
|
- usb_ep_fifo_flush(ep);
|
|
|
-
|
|
|
- /* Hold the lock while we update the request and buffer states */
|
|
|
- smp_wmb();
|
|
|
- spin_lock(&fsg->lock);
|
|
|
- fsg->intreq_busy = 0;
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
- wakeup_thread(fsg);
|
|
|
- spin_unlock(&fsg->lock);
|
|
|
-}
|
|
|
-
|
|
|
-#else
|
|
|
-static void intr_in_complete(struct usb_ep *ep, struct usb_request *req)
|
|
|
-{}
|
|
|
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* Ep0 class-specific handlers. These always run in_irq. */
|
|
|
-
|
|
|
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
|
|
|
-static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct usb_request *req = fsg->ep0req;
|
|
|
- static u8 cbi_reset_cmnd[6] = {
|
|
|
- SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff};
|
|
|
-
|
|
|
- /* Error in command transfer? */
|
|
|
- if (req->status || req->length != req->actual ||
|
|
|
- req->actual < 6 || req->actual > MAX_COMMAND_SIZE) {
|
|
|
-
|
|
|
- /* Not all controllers allow a protocol stall after
|
|
|
- * receiving control-out data, but we'll try anyway. */
|
|
|
- fsg_set_halt(fsg, fsg->ep0);
|
|
|
- return; // Wait for reset
|
|
|
- }
|
|
|
-
|
|
|
- /* Is it the special reset command? */
|
|
|
- if (req->actual >= sizeof cbi_reset_cmnd &&
|
|
|
- memcmp(req->buf, cbi_reset_cmnd,
|
|
|
- sizeof cbi_reset_cmnd) == 0) {
|
|
|
-
|
|
|
- /* Raise an exception to stop the current operation
|
|
|
- * and reinitialize our state. */
|
|
|
- DBG(fsg, "cbi reset request\n");
|
|
|
- raise_exception(fsg, FSG_STATE_RESET);
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- VDBG(fsg, "CB[I] accept device-specific command\n");
|
|
|
- spin_lock(&fsg->lock);
|
|
|
-
|
|
|
- /* Save the command for later */
|
|
|
- if (fsg->cbbuf_cmnd_size)
|
|
|
- WARNING(fsg, "CB[I] overwriting previous command\n");
|
|
|
- fsg->cbbuf_cmnd_size = req->actual;
|
|
|
- memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size);
|
|
|
-
|
|
|
- wakeup_thread(fsg);
|
|
|
- spin_unlock(&fsg->lock);
|
|
|
-}
|
|
|
-
|
|
|
-#else
|
|
|
-static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{}
|
|
|
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
|
|
|
-
|
|
|
-
|
|
|
-static int class_setup_req(struct fsg_dev *fsg,
|
|
|
- const struct usb_ctrlrequest *ctrl)
|
|
|
-{
|
|
|
- struct usb_request *req = fsg->ep0req;
|
|
|
- int value = -EOPNOTSUPP;
|
|
|
- u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
|
- u16 w_value = le16_to_cpu(ctrl->wValue);
|
|
|
- u16 w_length = le16_to_cpu(ctrl->wLength);
|
|
|
-
|
|
|
- if (!fsg->config)
|
|
|
- return value;
|
|
|
-
|
|
|
- /* Handle Bulk-only class-specific requests */
|
|
|
- if (transport_is_bbb()) {
|
|
|
- switch (ctrl->bRequest) {
|
|
|
-
|
|
|
- case US_BULK_RESET_REQUEST:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_OUT |
|
|
|
- USB_TYPE_CLASS | USB_RECIP_INTERFACE))
|
|
|
- break;
|
|
|
- if (w_index != 0 || w_value != 0 || w_length != 0) {
|
|
|
- value = -EDOM;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* Raise an exception to stop the current operation
|
|
|
- * and reinitialize our state. */
|
|
|
- DBG(fsg, "bulk reset request\n");
|
|
|
- raise_exception(fsg, FSG_STATE_RESET);
|
|
|
- value = DELAYED_STATUS;
|
|
|
- break;
|
|
|
-
|
|
|
- case US_BULK_GET_MAX_LUN:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_IN |
|
|
|
- USB_TYPE_CLASS | USB_RECIP_INTERFACE))
|
|
|
- break;
|
|
|
- if (w_index != 0 || w_value != 0 || w_length != 1) {
|
|
|
- value = -EDOM;
|
|
|
- break;
|
|
|
- }
|
|
|
- VDBG(fsg, "get max LUN\n");
|
|
|
- *(u8 *) req->buf = fsg->nluns - 1;
|
|
|
- value = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Handle CBI class-specific requests */
|
|
|
- else {
|
|
|
- switch (ctrl->bRequest) {
|
|
|
-
|
|
|
- case USB_CBI_ADSC_REQUEST:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_OUT |
|
|
|
- USB_TYPE_CLASS | USB_RECIP_INTERFACE))
|
|
|
- break;
|
|
|
- if (w_index != 0 || w_value != 0) {
|
|
|
- value = -EDOM;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (w_length > MAX_COMMAND_SIZE) {
|
|
|
- value = -EOVERFLOW;
|
|
|
- break;
|
|
|
- }
|
|
|
- value = w_length;
|
|
|
- fsg->ep0req->context = received_cbi_adsc;
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (value == -EOPNOTSUPP)
|
|
|
- VDBG(fsg,
|
|
|
- "unknown class-specific control req "
|
|
|
- "%02x.%02x v%04x i%04x l%u\n",
|
|
|
- ctrl->bRequestType, ctrl->bRequest,
|
|
|
- le16_to_cpu(ctrl->wValue), w_index, w_length);
|
|
|
- return value;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* Ep0 standard request handlers. These always run in_irq. */
|
|
|
-
|
|
|
-static int standard_setup_req(struct fsg_dev *fsg,
|
|
|
- const struct usb_ctrlrequest *ctrl)
|
|
|
-{
|
|
|
- struct usb_request *req = fsg->ep0req;
|
|
|
- int value = -EOPNOTSUPP;
|
|
|
- u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
|
- u16 w_value = le16_to_cpu(ctrl->wValue);
|
|
|
-
|
|
|
- /* Usually this just stores reply data in the pre-allocated ep0 buffer,
|
|
|
- * but config change events will also reconfigure hardware. */
|
|
|
- switch (ctrl->bRequest) {
|
|
|
-
|
|
|
- case USB_REQ_GET_DESCRIPTOR:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
|
|
|
- USB_RECIP_DEVICE))
|
|
|
- break;
|
|
|
- switch (w_value >> 8) {
|
|
|
-
|
|
|
- case USB_DT_DEVICE:
|
|
|
- VDBG(fsg, "get device descriptor\n");
|
|
|
- device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket;
|
|
|
- value = sizeof device_desc;
|
|
|
- memcpy(req->buf, &device_desc, value);
|
|
|
- break;
|
|
|
- case USB_DT_DEVICE_QUALIFIER:
|
|
|
- VDBG(fsg, "get device qualifier\n");
|
|
|
- if (!gadget_is_dualspeed(fsg->gadget) ||
|
|
|
- fsg->gadget->speed == USB_SPEED_SUPER)
|
|
|
- break;
|
|
|
- /*
|
|
|
- * Assume ep0 uses the same maxpacket value for both
|
|
|
- * speeds
|
|
|
- */
|
|
|
- dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket;
|
|
|
- value = sizeof dev_qualifier;
|
|
|
- memcpy(req->buf, &dev_qualifier, value);
|
|
|
- break;
|
|
|
-
|
|
|
- case USB_DT_OTHER_SPEED_CONFIG:
|
|
|
- VDBG(fsg, "get other-speed config descriptor\n");
|
|
|
- if (!gadget_is_dualspeed(fsg->gadget) ||
|
|
|
- fsg->gadget->speed == USB_SPEED_SUPER)
|
|
|
- break;
|
|
|
- goto get_config;
|
|
|
- case USB_DT_CONFIG:
|
|
|
- VDBG(fsg, "get configuration descriptor\n");
|
|
|
-get_config:
|
|
|
- value = populate_config_buf(fsg->gadget,
|
|
|
- req->buf,
|
|
|
- w_value >> 8,
|
|
|
- w_value & 0xff);
|
|
|
- break;
|
|
|
-
|
|
|
- case USB_DT_STRING:
|
|
|
- VDBG(fsg, "get string descriptor\n");
|
|
|
-
|
|
|
- /* wIndex == language code */
|
|
|
- value = usb_gadget_get_string(&fsg_stringtab,
|
|
|
- w_value & 0xff, req->buf);
|
|
|
- break;
|
|
|
-
|
|
|
- case USB_DT_BOS:
|
|
|
- VDBG(fsg, "get bos descriptor\n");
|
|
|
-
|
|
|
- if (gadget_is_superspeed(fsg->gadget))
|
|
|
- value = populate_bos(fsg, req->buf);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- break;
|
|
|
-
|
|
|
- /* One config, two speeds */
|
|
|
- case USB_REQ_SET_CONFIGURATION:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
|
|
|
- USB_RECIP_DEVICE))
|
|
|
- break;
|
|
|
- VDBG(fsg, "set configuration\n");
|
|
|
- if (w_value == CONFIG_VALUE || w_value == 0) {
|
|
|
- fsg->new_config = w_value;
|
|
|
-
|
|
|
- /* Raise an exception to wipe out previous transaction
|
|
|
- * state (queued bufs, etc) and set the new config. */
|
|
|
- raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
|
|
|
- value = DELAYED_STATUS;
|
|
|
- }
|
|
|
- break;
|
|
|
- case USB_REQ_GET_CONFIGURATION:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
|
|
|
- USB_RECIP_DEVICE))
|
|
|
- break;
|
|
|
- VDBG(fsg, "get configuration\n");
|
|
|
- *(u8 *) req->buf = fsg->config;
|
|
|
- value = 1;
|
|
|
- break;
|
|
|
-
|
|
|
- case USB_REQ_SET_INTERFACE:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD |
|
|
|
- USB_RECIP_INTERFACE))
|
|
|
- break;
|
|
|
- if (fsg->config && w_index == 0) {
|
|
|
-
|
|
|
- /* Raise an exception to wipe out previous transaction
|
|
|
- * state (queued bufs, etc) and install the new
|
|
|
- * interface altsetting. */
|
|
|
- raise_exception(fsg, FSG_STATE_INTERFACE_CHANGE);
|
|
|
- value = DELAYED_STATUS;
|
|
|
- }
|
|
|
- break;
|
|
|
- case USB_REQ_GET_INTERFACE:
|
|
|
- if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD |
|
|
|
- USB_RECIP_INTERFACE))
|
|
|
- break;
|
|
|
- if (!fsg->config)
|
|
|
- break;
|
|
|
- if (w_index != 0) {
|
|
|
- value = -EDOM;
|
|
|
- break;
|
|
|
- }
|
|
|
- VDBG(fsg, "get interface\n");
|
|
|
- *(u8 *) req->buf = 0;
|
|
|
- value = 1;
|
|
|
- break;
|
|
|
-
|
|
|
- default:
|
|
|
- VDBG(fsg,
|
|
|
- "unknown control req %02x.%02x v%04x i%04x l%u\n",
|
|
|
- ctrl->bRequestType, ctrl->bRequest,
|
|
|
- w_value, w_index, le16_to_cpu(ctrl->wLength));
|
|
|
- }
|
|
|
-
|
|
|
- return value;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int fsg_setup(struct usb_gadget *gadget,
|
|
|
- const struct usb_ctrlrequest *ctrl)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = get_gadget_data(gadget);
|
|
|
- int rc;
|
|
|
- int w_length = le16_to_cpu(ctrl->wLength);
|
|
|
-
|
|
|
- ++fsg->ep0_req_tag; // Record arrival of a new request
|
|
|
- fsg->ep0req->context = NULL;
|
|
|
- fsg->ep0req->length = 0;
|
|
|
- dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl));
|
|
|
-
|
|
|
- if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
|
|
|
- rc = class_setup_req(fsg, ctrl);
|
|
|
- else
|
|
|
- rc = standard_setup_req(fsg, ctrl);
|
|
|
-
|
|
|
- /* Respond with data/status or defer until later? */
|
|
|
- if (rc >= 0 && rc != DELAYED_STATUS) {
|
|
|
- rc = min(rc, w_length);
|
|
|
- fsg->ep0req->length = rc;
|
|
|
- fsg->ep0req->zero = rc < w_length;
|
|
|
- fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ?
|
|
|
- "ep0-in" : "ep0-out");
|
|
|
- rc = ep0_queue(fsg);
|
|
|
- }
|
|
|
-
|
|
|
- /* Device either stalls (rc < 0) or reports success */
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* All the following routines run in process context */
|
|
|
-
|
|
|
-
|
|
|
-/* Use this for bulk or interrupt transfers, not ep0 */
|
|
|
-static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
|
|
|
- struct usb_request *req, int *pbusy,
|
|
|
- enum fsg_buffer_state *state)
|
|
|
-{
|
|
|
- int rc;
|
|
|
-
|
|
|
- if (ep == fsg->bulk_in)
|
|
|
- dump_msg(fsg, "bulk-in", req->buf, req->length);
|
|
|
- else if (ep == fsg->intr_in)
|
|
|
- dump_msg(fsg, "intr-in", req->buf, req->length);
|
|
|
-
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- *pbusy = 1;
|
|
|
- *state = BUF_STATE_BUSY;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
- rc = usb_ep_queue(ep, req, GFP_KERNEL);
|
|
|
- if (rc != 0) {
|
|
|
- *pbusy = 0;
|
|
|
- *state = BUF_STATE_EMPTY;
|
|
|
-
|
|
|
- /* We can't do much more than wait for a reset */
|
|
|
-
|
|
|
- /* Note: currently the net2280 driver fails zero-length
|
|
|
- * submissions if DMA is enabled. */
|
|
|
- if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP &&
|
|
|
- req->length == 0))
|
|
|
- WARNING(fsg, "error in submission: %s --> %d\n",
|
|
|
- ep->name, rc);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int sleep_thread(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- int rc = 0;
|
|
|
-
|
|
|
- /* Wait until a signal arrives or we are woken up */
|
|
|
- for (;;) {
|
|
|
- try_to_freeze();
|
|
|
- set_current_state(TASK_INTERRUPTIBLE);
|
|
|
- if (signal_pending(current)) {
|
|
|
- rc = -EINTR;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (fsg->thread_wakeup_needed)
|
|
|
- break;
|
|
|
- schedule();
|
|
|
- }
|
|
|
- __set_current_state(TASK_RUNNING);
|
|
|
- fsg->thread_wakeup_needed = 0;
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int do_read(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- u32 lba;
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- int rc;
|
|
|
- u32 amount_left;
|
|
|
- loff_t file_offset, file_offset_tmp;
|
|
|
- unsigned int amount;
|
|
|
- ssize_t nread;
|
|
|
-
|
|
|
- /* Get the starting Logical Block Address and check that it's
|
|
|
- * not too big */
|
|
|
- if (fsg->cmnd[0] == READ_6)
|
|
|
- lba = get_unaligned_be24(&fsg->cmnd[1]);
|
|
|
- else {
|
|
|
- lba = get_unaligned_be32(&fsg->cmnd[2]);
|
|
|
-
|
|
|
- /* We allow DPO (Disable Page Out = don't save data in the
|
|
|
- * cache) and FUA (Force Unit Access = don't read from the
|
|
|
- * cache), but we don't implement them. */
|
|
|
- if ((fsg->cmnd[1] & ~0x18) != 0) {
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
- if (lba >= curlun->num_sectors) {
|
|
|
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- file_offset = ((loff_t) lba) << curlun->blkbits;
|
|
|
-
|
|
|
- /* Carry out the file reads */
|
|
|
- amount_left = fsg->data_size_from_cmnd;
|
|
|
- if (unlikely(amount_left == 0))
|
|
|
- return -EIO; // No default reply
|
|
|
-
|
|
|
- for (;;) {
|
|
|
-
|
|
|
- /* Figure out how much we need to read:
|
|
|
- * Try to read the remaining amount.
|
|
|
- * But don't read more than the buffer size.
|
|
|
- * And don't try to read past the end of the file.
|
|
|
- */
|
|
|
- amount = min((unsigned int) amount_left, mod_data.buflen);
|
|
|
- amount = min((loff_t) amount,
|
|
|
- curlun->file_length - file_offset);
|
|
|
-
|
|
|
- /* Wait for the next buffer to become available */
|
|
|
- bh = fsg->next_buffhd_to_fill;
|
|
|
- while (bh->state != BUF_STATE_EMPTY) {
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
-
|
|
|
- /* If we were asked to read past the end of file,
|
|
|
- * end with an empty buffer. */
|
|
|
- if (amount == 0) {
|
|
|
- curlun->sense_data =
|
|
|
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- curlun->sense_data_info = file_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- bh->inreq->length = 0;
|
|
|
- bh->state = BUF_STATE_FULL;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* Perform the read */
|
|
|
- file_offset_tmp = file_offset;
|
|
|
- nread = vfs_read(curlun->filp,
|
|
|
- (char __user *) bh->buf,
|
|
|
- amount, &file_offset_tmp);
|
|
|
- VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
|
|
|
- (unsigned long long) file_offset,
|
|
|
- (int) nread);
|
|
|
- if (signal_pending(current))
|
|
|
- return -EINTR;
|
|
|
-
|
|
|
- if (nread < 0) {
|
|
|
- LDBG(curlun, "error in file read: %d\n",
|
|
|
- (int) nread);
|
|
|
- nread = 0;
|
|
|
- } else if (nread < amount) {
|
|
|
- LDBG(curlun, "partial file read: %d/%u\n",
|
|
|
- (int) nread, amount);
|
|
|
- nread = round_down(nread, curlun->blksize);
|
|
|
- }
|
|
|
- file_offset += nread;
|
|
|
- amount_left -= nread;
|
|
|
- fsg->residue -= nread;
|
|
|
-
|
|
|
- /* Except at the end of the transfer, nread will be
|
|
|
- * equal to the buffer size, which is divisible by the
|
|
|
- * bulk-in maxpacket size.
|
|
|
- */
|
|
|
- bh->inreq->length = nread;
|
|
|
- bh->state = BUF_STATE_FULL;
|
|
|
-
|
|
|
- /* If an error occurred, report it and its position */
|
|
|
- if (nread < amount) {
|
|
|
- curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
|
|
|
- curlun->sense_data_info = file_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- if (amount_left == 0)
|
|
|
- break; // No more left to read
|
|
|
-
|
|
|
- /* Send this buffer and go read some more */
|
|
|
- bh->inreq->zero = 0;
|
|
|
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
|
|
|
- &bh->inreq_busy, &bh->state);
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- }
|
|
|
-
|
|
|
- return -EIO; // No default reply
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int do_write(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- u32 lba;
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- int get_some_more;
|
|
|
- u32 amount_left_to_req, amount_left_to_write;
|
|
|
- loff_t usb_offset, file_offset, file_offset_tmp;
|
|
|
- unsigned int amount;
|
|
|
- ssize_t nwritten;
|
|
|
- int rc;
|
|
|
-
|
|
|
- if (curlun->ro) {
|
|
|
- curlun->sense_data = SS_WRITE_PROTECTED;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- spin_lock(&curlun->filp->f_lock);
|
|
|
- curlun->filp->f_flags &= ~O_SYNC; // Default is not to wait
|
|
|
- spin_unlock(&curlun->filp->f_lock);
|
|
|
-
|
|
|
- /* Get the starting Logical Block Address and check that it's
|
|
|
- * not too big */
|
|
|
- if (fsg->cmnd[0] == WRITE_6)
|
|
|
- lba = get_unaligned_be24(&fsg->cmnd[1]);
|
|
|
- else {
|
|
|
- lba = get_unaligned_be32(&fsg->cmnd[2]);
|
|
|
-
|
|
|
- /* We allow DPO (Disable Page Out = don't save data in the
|
|
|
- * cache) and FUA (Force Unit Access = write directly to the
|
|
|
- * medium). We don't implement DPO; we implement FUA by
|
|
|
- * performing synchronous output. */
|
|
|
- if ((fsg->cmnd[1] & ~0x18) != 0) {
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- /* FUA */
|
|
|
- if (!curlun->nofua && (fsg->cmnd[1] & 0x08)) {
|
|
|
- spin_lock(&curlun->filp->f_lock);
|
|
|
- curlun->filp->f_flags |= O_DSYNC;
|
|
|
- spin_unlock(&curlun->filp->f_lock);
|
|
|
- }
|
|
|
- }
|
|
|
- if (lba >= curlun->num_sectors) {
|
|
|
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Carry out the file writes */
|
|
|
- get_some_more = 1;
|
|
|
- file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits;
|
|
|
- amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd;
|
|
|
-
|
|
|
- while (amount_left_to_write > 0) {
|
|
|
-
|
|
|
- /* Queue a request for more data from the host */
|
|
|
- bh = fsg->next_buffhd_to_fill;
|
|
|
- if (bh->state == BUF_STATE_EMPTY && get_some_more) {
|
|
|
-
|
|
|
- /* Figure out how much we want to get:
|
|
|
- * Try to get the remaining amount,
|
|
|
- * but not more than the buffer size.
|
|
|
- */
|
|
|
- amount = min(amount_left_to_req, mod_data.buflen);
|
|
|
-
|
|
|
- /* Beyond the end of the backing file? */
|
|
|
- if (usb_offset >= curlun->file_length) {
|
|
|
- get_some_more = 0;
|
|
|
- curlun->sense_data =
|
|
|
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- curlun->sense_data_info = usb_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- /* Get the next buffer */
|
|
|
- usb_offset += amount;
|
|
|
- fsg->usb_amount_left -= amount;
|
|
|
- amount_left_to_req -= amount;
|
|
|
- if (amount_left_to_req == 0)
|
|
|
- get_some_more = 0;
|
|
|
-
|
|
|
- /* Except at the end of the transfer, amount will be
|
|
|
- * equal to the buffer size, which is divisible by
|
|
|
- * the bulk-out maxpacket size.
|
|
|
- */
|
|
|
- set_bulk_out_req_length(fsg, bh, amount);
|
|
|
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
|
|
|
- &bh->outreq_busy, &bh->state);
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- /* Write the received data to the backing file */
|
|
|
- bh = fsg->next_buffhd_to_drain;
|
|
|
- if (bh->state == BUF_STATE_EMPTY && !get_some_more)
|
|
|
- break; // We stopped early
|
|
|
- if (bh->state == BUF_STATE_FULL) {
|
|
|
- smp_rmb();
|
|
|
- fsg->next_buffhd_to_drain = bh->next;
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
-
|
|
|
- /* Did something go wrong with the transfer? */
|
|
|
- if (bh->outreq->status != 0) {
|
|
|
- curlun->sense_data = SS_COMMUNICATION_FAILURE;
|
|
|
- curlun->sense_data_info = file_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- amount = bh->outreq->actual;
|
|
|
- if (curlun->file_length - file_offset < amount) {
|
|
|
- LERROR(curlun,
|
|
|
- "write %u @ %llu beyond end %llu\n",
|
|
|
- amount, (unsigned long long) file_offset,
|
|
|
- (unsigned long long) curlun->file_length);
|
|
|
- amount = curlun->file_length - file_offset;
|
|
|
- }
|
|
|
-
|
|
|
- /* Don't accept excess data. The spec doesn't say
|
|
|
- * what to do in this case. We'll ignore the error.
|
|
|
- */
|
|
|
- amount = min(amount, bh->bulk_out_intended_length);
|
|
|
-
|
|
|
- /* Don't write a partial block */
|
|
|
- amount = round_down(amount, curlun->blksize);
|
|
|
- if (amount == 0)
|
|
|
- goto empty_write;
|
|
|
-
|
|
|
- /* Perform the write */
|
|
|
- file_offset_tmp = file_offset;
|
|
|
- nwritten = vfs_write(curlun->filp,
|
|
|
- (char __user *) bh->buf,
|
|
|
- amount, &file_offset_tmp);
|
|
|
- VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
|
|
|
- (unsigned long long) file_offset,
|
|
|
- (int) nwritten);
|
|
|
- if (signal_pending(current))
|
|
|
- return -EINTR; // Interrupted!
|
|
|
-
|
|
|
- if (nwritten < 0) {
|
|
|
- LDBG(curlun, "error in file write: %d\n",
|
|
|
- (int) nwritten);
|
|
|
- nwritten = 0;
|
|
|
- } else if (nwritten < amount) {
|
|
|
- LDBG(curlun, "partial file write: %d/%u\n",
|
|
|
- (int) nwritten, amount);
|
|
|
- nwritten = round_down(nwritten, curlun->blksize);
|
|
|
- }
|
|
|
- file_offset += nwritten;
|
|
|
- amount_left_to_write -= nwritten;
|
|
|
- fsg->residue -= nwritten;
|
|
|
-
|
|
|
- /* If an error occurred, report it and its position */
|
|
|
- if (nwritten < amount) {
|
|
|
- curlun->sense_data = SS_WRITE_ERROR;
|
|
|
- curlun->sense_data_info = file_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- empty_write:
|
|
|
- /* Did the host decide to stop early? */
|
|
|
- if (bh->outreq->actual < bh->bulk_out_intended_length) {
|
|
|
- fsg->short_packet_received = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- /* Wait for something to happen */
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
-
|
|
|
- return -EIO; // No default reply
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int do_synchronize_cache(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- int rc;
|
|
|
-
|
|
|
- /* We ignore the requested LBA and write out all file's
|
|
|
- * dirty data buffers. */
|
|
|
- rc = fsg_lun_fsync_sub(curlun);
|
|
|
- if (rc)
|
|
|
- curlun->sense_data = SS_WRITE_ERROR;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static void invalidate_sub(struct fsg_lun *curlun)
|
|
|
-{
|
|
|
- struct file *filp = curlun->filp;
|
|
|
- struct inode *inode = filp->f_path.dentry->d_inode;
|
|
|
- unsigned long rc;
|
|
|
-
|
|
|
- rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
|
|
|
- VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc);
|
|
|
-}
|
|
|
-
|
|
|
-static int do_verify(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- u32 lba;
|
|
|
- u32 verification_length;
|
|
|
- struct fsg_buffhd *bh = fsg->next_buffhd_to_fill;
|
|
|
- loff_t file_offset, file_offset_tmp;
|
|
|
- u32 amount_left;
|
|
|
- unsigned int amount;
|
|
|
- ssize_t nread;
|
|
|
-
|
|
|
- /* Get the starting Logical Block Address and check that it's
|
|
|
- * not too big */
|
|
|
- lba = get_unaligned_be32(&fsg->cmnd[2]);
|
|
|
- if (lba >= curlun->num_sectors) {
|
|
|
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* We allow DPO (Disable Page Out = don't save data in the
|
|
|
- * cache) but we don't implement it. */
|
|
|
- if ((fsg->cmnd[1] & ~0x10) != 0) {
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- verification_length = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if (unlikely(verification_length == 0))
|
|
|
- return -EIO; // No default reply
|
|
|
-
|
|
|
- /* Prepare to carry out the file verify */
|
|
|
- amount_left = verification_length << curlun->blkbits;
|
|
|
- file_offset = ((loff_t) lba) << curlun->blkbits;
|
|
|
-
|
|
|
- /* Write out all the dirty buffers before invalidating them */
|
|
|
- fsg_lun_fsync_sub(curlun);
|
|
|
- if (signal_pending(current))
|
|
|
- return -EINTR;
|
|
|
-
|
|
|
- invalidate_sub(curlun);
|
|
|
- if (signal_pending(current))
|
|
|
- return -EINTR;
|
|
|
-
|
|
|
- /* Just try to read the requested blocks */
|
|
|
- while (amount_left > 0) {
|
|
|
-
|
|
|
- /* Figure out how much we need to read:
|
|
|
- * Try to read the remaining amount, but not more than
|
|
|
- * the buffer size.
|
|
|
- * And don't try to read past the end of the file.
|
|
|
- */
|
|
|
- amount = min((unsigned int) amount_left, mod_data.buflen);
|
|
|
- amount = min((loff_t) amount,
|
|
|
- curlun->file_length - file_offset);
|
|
|
- if (amount == 0) {
|
|
|
- curlun->sense_data =
|
|
|
- SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- curlun->sense_data_info = file_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* Perform the read */
|
|
|
- file_offset_tmp = file_offset;
|
|
|
- nread = vfs_read(curlun->filp,
|
|
|
- (char __user *) bh->buf,
|
|
|
- amount, &file_offset_tmp);
|
|
|
- VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
|
|
|
- (unsigned long long) file_offset,
|
|
|
- (int) nread);
|
|
|
- if (signal_pending(current))
|
|
|
- return -EINTR;
|
|
|
-
|
|
|
- if (nread < 0) {
|
|
|
- LDBG(curlun, "error in file verify: %d\n",
|
|
|
- (int) nread);
|
|
|
- nread = 0;
|
|
|
- } else if (nread < amount) {
|
|
|
- LDBG(curlun, "partial file verify: %d/%u\n",
|
|
|
- (int) nread, amount);
|
|
|
- nread = round_down(nread, curlun->blksize);
|
|
|
- }
|
|
|
- if (nread == 0) {
|
|
|
- curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
|
|
|
- curlun->sense_data_info = file_offset >> curlun->blkbits;
|
|
|
- curlun->info_valid = 1;
|
|
|
- break;
|
|
|
- }
|
|
|
- file_offset += nread;
|
|
|
- amount_left -= nread;
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
-
|
|
|
- static char vendor_id[] = "Linux ";
|
|
|
- static char product_disk_id[] = "File-Stor Gadget";
|
|
|
- static char product_cdrom_id[] = "File-CD Gadget ";
|
|
|
-
|
|
|
- if (!fsg->curlun) { // Unsupported LUNs are okay
|
|
|
- fsg->bad_lun_okay = 1;
|
|
|
- memset(buf, 0, 36);
|
|
|
- buf[0] = 0x7f; // Unsupported, no device-type
|
|
|
- buf[4] = 31; // Additional length
|
|
|
- return 36;
|
|
|
- }
|
|
|
-
|
|
|
- memset(buf, 0, 8);
|
|
|
- buf[0] = (mod_data.cdrom ? TYPE_ROM : TYPE_DISK);
|
|
|
- if (mod_data.removable)
|
|
|
- buf[1] = 0x80;
|
|
|
- buf[2] = 2; // ANSI SCSI level 2
|
|
|
- buf[3] = 2; // SCSI-2 INQUIRY data format
|
|
|
- buf[4] = 31; // Additional length
|
|
|
- // No special options
|
|
|
- sprintf(buf + 8, "%-8s%-16s%04x", vendor_id,
|
|
|
- (mod_data.cdrom ? product_cdrom_id :
|
|
|
- product_disk_id),
|
|
|
- mod_data.release);
|
|
|
- return 36;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
- u32 sd, sdinfo;
|
|
|
- int valid;
|
|
|
-
|
|
|
- /*
|
|
|
- * From the SCSI-2 spec., section 7.9 (Unit attention condition):
|
|
|
- *
|
|
|
- * If a REQUEST SENSE command is received from an initiator
|
|
|
- * with a pending unit attention condition (before the target
|
|
|
- * generates the contingent allegiance condition), then the
|
|
|
- * target shall either:
|
|
|
- * a) report any pending sense data and preserve the unit
|
|
|
- * attention condition on the logical unit, or,
|
|
|
- * b) report the unit attention condition, may discard any
|
|
|
- * pending sense data, and clear the unit attention
|
|
|
- * condition on the logical unit for that initiator.
|
|
|
- *
|
|
|
- * FSG normally uses option a); enable this code to use option b).
|
|
|
- */
|
|
|
-#if 0
|
|
|
- if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
|
|
|
- curlun->sense_data = curlun->unit_attention_data;
|
|
|
- curlun->unit_attention_data = SS_NO_SENSE;
|
|
|
- }
|
|
|
-#endif
|
|
|
-
|
|
|
- if (!curlun) { // Unsupported LUNs are okay
|
|
|
- fsg->bad_lun_okay = 1;
|
|
|
- sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
|
|
|
- sdinfo = 0;
|
|
|
- valid = 0;
|
|
|
- } else {
|
|
|
- sd = curlun->sense_data;
|
|
|
- sdinfo = curlun->sense_data_info;
|
|
|
- valid = curlun->info_valid << 7;
|
|
|
- curlun->sense_data = SS_NO_SENSE;
|
|
|
- curlun->sense_data_info = 0;
|
|
|
- curlun->info_valid = 0;
|
|
|
- }
|
|
|
-
|
|
|
- memset(buf, 0, 18);
|
|
|
- buf[0] = valid | 0x70; // Valid, current error
|
|
|
- buf[2] = SK(sd);
|
|
|
- put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */
|
|
|
- buf[7] = 18 - 8; // Additional sense length
|
|
|
- buf[12] = ASC(sd);
|
|
|
- buf[13] = ASCQ(sd);
|
|
|
- return 18;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- u32 lba = get_unaligned_be32(&fsg->cmnd[2]);
|
|
|
- int pmi = fsg->cmnd[8];
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
-
|
|
|
- /* Check the PMI and LBA fields */
|
|
|
- if (pmi > 1 || (pmi == 0 && lba != 0)) {
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- put_unaligned_be32(curlun->num_sectors - 1, &buf[0]);
|
|
|
- /* Max logical block */
|
|
|
- put_unaligned_be32(curlun->blksize, &buf[4]); /* Block length */
|
|
|
- return 8;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_read_header(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- int msf = fsg->cmnd[1] & 0x02;
|
|
|
- u32 lba = get_unaligned_be32(&fsg->cmnd[2]);
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
-
|
|
|
- if ((fsg->cmnd[1] & ~0x02) != 0) { /* Mask away MSF */
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- if (lba >= curlun->num_sectors) {
|
|
|
- curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- memset(buf, 0, 8);
|
|
|
- buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */
|
|
|
- store_cdrom_address(&buf[4], msf, lba);
|
|
|
- return 8;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- int msf = fsg->cmnd[1] & 0x02;
|
|
|
- int start_track = fsg->cmnd[6];
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
-
|
|
|
- if ((fsg->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
|
|
|
- start_track > 1) {
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- memset(buf, 0, 20);
|
|
|
- buf[1] = (20-2); /* TOC data length */
|
|
|
- buf[2] = 1; /* First track number */
|
|
|
- buf[3] = 1; /* Last track number */
|
|
|
- buf[5] = 0x16; /* Data track, copying allowed */
|
|
|
- buf[6] = 0x01; /* Only track is number 1 */
|
|
|
- store_cdrom_address(&buf[8], msf, 0);
|
|
|
-
|
|
|
- buf[13] = 0x16; /* Lead-out track is data */
|
|
|
- buf[14] = 0xAA; /* Lead-out track number */
|
|
|
- store_cdrom_address(&buf[16], msf, curlun->num_sectors);
|
|
|
- return 20;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- int mscmnd = fsg->cmnd[0];
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
- u8 *buf0 = buf;
|
|
|
- int pc, page_code;
|
|
|
- int changeable_values, all_pages;
|
|
|
- int valid_page = 0;
|
|
|
- int len, limit;
|
|
|
-
|
|
|
- if ((fsg->cmnd[1] & ~0x08) != 0) { // Mask away DBD
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- pc = fsg->cmnd[2] >> 6;
|
|
|
- page_code = fsg->cmnd[2] & 0x3f;
|
|
|
- if (pc == 3) {
|
|
|
- curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- changeable_values = (pc == 1);
|
|
|
- all_pages = (page_code == 0x3f);
|
|
|
-
|
|
|
- /* Write the mode parameter header. Fixed values are: default
|
|
|
- * medium type, no cache control (DPOFUA), and no block descriptors.
|
|
|
- * The only variable value is the WriteProtect bit. We will fill in
|
|
|
- * the mode data length later. */
|
|
|
- memset(buf, 0, 8);
|
|
|
- if (mscmnd == MODE_SENSE) {
|
|
|
- buf[2] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA
|
|
|
- buf += 4;
|
|
|
- limit = 255;
|
|
|
- } else { // MODE_SENSE_10
|
|
|
- buf[3] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA
|
|
|
- buf += 8;
|
|
|
- limit = 65535; // Should really be mod_data.buflen
|
|
|
- }
|
|
|
-
|
|
|
- /* No block descriptors */
|
|
|
-
|
|
|
- /* The mode pages, in numerical order. The only page we support
|
|
|
- * is the Caching page. */
|
|
|
- if (page_code == 0x08 || all_pages) {
|
|
|
- valid_page = 1;
|
|
|
- buf[0] = 0x08; // Page code
|
|
|
- buf[1] = 10; // Page length
|
|
|
- memset(buf+2, 0, 10); // None of the fields are changeable
|
|
|
-
|
|
|
- if (!changeable_values) {
|
|
|
- buf[2] = 0x04; // Write cache enable,
|
|
|
- // Read cache not disabled
|
|
|
- // No cache retention priorities
|
|
|
- put_unaligned_be16(0xffff, &buf[4]);
|
|
|
- /* Don't disable prefetch */
|
|
|
- /* Minimum prefetch = 0 */
|
|
|
- put_unaligned_be16(0xffff, &buf[8]);
|
|
|
- /* Maximum prefetch */
|
|
|
- put_unaligned_be16(0xffff, &buf[10]);
|
|
|
- /* Maximum prefetch ceiling */
|
|
|
- }
|
|
|
- buf += 12;
|
|
|
- }
|
|
|
-
|
|
|
- /* Check that a valid page was requested and the mode data length
|
|
|
- * isn't too long. */
|
|
|
- len = buf - buf0;
|
|
|
- if (!valid_page || len > limit) {
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Store the mode data length */
|
|
|
- if (mscmnd == MODE_SENSE)
|
|
|
- buf0[0] = len - 1;
|
|
|
- else
|
|
|
- put_unaligned_be16(len - 2, buf0);
|
|
|
- return len;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_start_stop(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- int loej, start;
|
|
|
-
|
|
|
- if (!mod_data.removable) {
|
|
|
- curlun->sense_data = SS_INVALID_COMMAND;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- // int immed = fsg->cmnd[1] & 0x01;
|
|
|
- loej = fsg->cmnd[4] & 0x02;
|
|
|
- start = fsg->cmnd[4] & 0x01;
|
|
|
-
|
|
|
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
|
|
|
- if ((fsg->cmnd[1] & ~0x01) != 0 || // Mask away Immed
|
|
|
- (fsg->cmnd[4] & ~0x03) != 0) { // Mask LoEj, Start
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- if (!start) {
|
|
|
-
|
|
|
- /* Are we allowed to unload the media? */
|
|
|
- if (curlun->prevent_medium_removal) {
|
|
|
- LDBG(curlun, "unload attempt prevented\n");
|
|
|
- curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- if (loej) { // Simulate an unload/eject
|
|
|
- up_read(&fsg->filesem);
|
|
|
- down_write(&fsg->filesem);
|
|
|
- fsg_lun_close(curlun);
|
|
|
- up_write(&fsg->filesem);
|
|
|
- down_read(&fsg->filesem);
|
|
|
- }
|
|
|
- } else {
|
|
|
-
|
|
|
- /* Our emulation doesn't support mounting; the medium is
|
|
|
- * available for use as soon as it is loaded. */
|
|
|
- if (!fsg_lun_is_open(curlun)) {
|
|
|
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-#endif
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_prevent_allow(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- int prevent;
|
|
|
-
|
|
|
- if (!mod_data.removable) {
|
|
|
- curlun->sense_data = SS_INVALID_COMMAND;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- prevent = fsg->cmnd[4] & 0x01;
|
|
|
- if ((fsg->cmnd[4] & ~0x01) != 0) { // Mask away Prevent
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- if (curlun->prevent_medium_removal && !prevent)
|
|
|
- fsg_lun_fsync_sub(curlun);
|
|
|
- curlun->prevent_medium_removal = prevent;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_read_format_capacities(struct fsg_dev *fsg,
|
|
|
- struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- u8 *buf = (u8 *) bh->buf;
|
|
|
-
|
|
|
- buf[0] = buf[1] = buf[2] = 0;
|
|
|
- buf[3] = 8; // Only the Current/Maximum Capacity Descriptor
|
|
|
- buf += 4;
|
|
|
-
|
|
|
- put_unaligned_be32(curlun->num_sectors, &buf[0]);
|
|
|
- /* Number of blocks */
|
|
|
- put_unaligned_be32(curlun->blksize, &buf[4]); /* Block length */
|
|
|
- buf[4] = 0x02; /* Current capacity */
|
|
|
- return 12;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
-
|
|
|
- /* We don't support MODE SELECT */
|
|
|
- curlun->sense_data = SS_INVALID_COMMAND;
|
|
|
- return -EINVAL;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int halt_bulk_in_endpoint(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- int rc;
|
|
|
-
|
|
|
- rc = fsg_set_halt(fsg, fsg->bulk_in);
|
|
|
- if (rc == -EAGAIN)
|
|
|
- VDBG(fsg, "delayed bulk-in endpoint halt\n");
|
|
|
- while (rc != 0) {
|
|
|
- if (rc != -EAGAIN) {
|
|
|
- WARNING(fsg, "usb_ep_set_halt -> %d\n", rc);
|
|
|
- rc = 0;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* Wait for a short time and then try again */
|
|
|
- if (msleep_interruptible(100) != 0)
|
|
|
- return -EINTR;
|
|
|
- rc = usb_ep_set_halt(fsg->bulk_in);
|
|
|
- }
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-static int wedge_bulk_in_endpoint(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- int rc;
|
|
|
-
|
|
|
- DBG(fsg, "bulk-in set wedge\n");
|
|
|
- rc = usb_ep_set_wedge(fsg->bulk_in);
|
|
|
- if (rc == -EAGAIN)
|
|
|
- VDBG(fsg, "delayed bulk-in endpoint wedge\n");
|
|
|
- while (rc != 0) {
|
|
|
- if (rc != -EAGAIN) {
|
|
|
- WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc);
|
|
|
- rc = 0;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* Wait for a short time and then try again */
|
|
|
- if (msleep_interruptible(100) != 0)
|
|
|
- return -EINTR;
|
|
|
- rc = usb_ep_set_wedge(fsg->bulk_in);
|
|
|
- }
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-static int throw_away_data(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- u32 amount;
|
|
|
- int rc;
|
|
|
-
|
|
|
- while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY ||
|
|
|
- fsg->usb_amount_left > 0) {
|
|
|
-
|
|
|
- /* Throw away the data in a filled buffer */
|
|
|
- if (bh->state == BUF_STATE_FULL) {
|
|
|
- smp_rmb();
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
- fsg->next_buffhd_to_drain = bh->next;
|
|
|
-
|
|
|
- /* A short packet or an error ends everything */
|
|
|
- if (bh->outreq->actual < bh->bulk_out_intended_length ||
|
|
|
- bh->outreq->status != 0) {
|
|
|
- raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
|
|
|
- return -EINTR;
|
|
|
- }
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- /* Try to submit another request if we need one */
|
|
|
- bh = fsg->next_buffhd_to_fill;
|
|
|
- if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) {
|
|
|
- amount = min(fsg->usb_amount_left,
|
|
|
- (u32) mod_data.buflen);
|
|
|
-
|
|
|
- /* Except at the end of the transfer, amount will be
|
|
|
- * equal to the buffer size, which is divisible by
|
|
|
- * the bulk-out maxpacket size.
|
|
|
- */
|
|
|
- set_bulk_out_req_length(fsg, bh, amount);
|
|
|
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
|
|
|
- &bh->outreq_busy, &bh->state);
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- fsg->usb_amount_left -= amount;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- /* Otherwise wait for something to happen */
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int finish_reply(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_buffhd *bh = fsg->next_buffhd_to_fill;
|
|
|
- int rc = 0;
|
|
|
-
|
|
|
- switch (fsg->data_dir) {
|
|
|
- case DATA_DIR_NONE:
|
|
|
- break; // Nothing to send
|
|
|
-
|
|
|
- /* If we don't know whether the host wants to read or write,
|
|
|
- * this must be CB or CBI with an unknown command. We mustn't
|
|
|
- * try to send or receive any data. So stall both bulk pipes
|
|
|
- * if we can and wait for a reset. */
|
|
|
- case DATA_DIR_UNKNOWN:
|
|
|
- if (mod_data.can_stall) {
|
|
|
- fsg_set_halt(fsg, fsg->bulk_out);
|
|
|
- rc = halt_bulk_in_endpoint(fsg);
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- /* All but the last buffer of data must have already been sent */
|
|
|
- case DATA_DIR_TO_HOST:
|
|
|
- if (fsg->data_size == 0)
|
|
|
- ; // Nothing to send
|
|
|
-
|
|
|
- /* If there's no residue, simply send the last buffer */
|
|
|
- else if (fsg->residue == 0) {
|
|
|
- bh->inreq->zero = 0;
|
|
|
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
|
|
|
- &bh->inreq_busy, &bh->state);
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- }
|
|
|
-
|
|
|
- /* There is a residue. For CB and CBI, simply mark the end
|
|
|
- * of the data with a short packet. However, if we are
|
|
|
- * allowed to stall, there was no data at all (residue ==
|
|
|
- * data_size), and the command failed (invalid LUN or
|
|
|
- * sense data is set), then halt the bulk-in endpoint
|
|
|
- * instead. */
|
|
|
- else if (!transport_is_bbb()) {
|
|
|
- if (mod_data.can_stall &&
|
|
|
- fsg->residue == fsg->data_size &&
|
|
|
- (!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) {
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
- rc = halt_bulk_in_endpoint(fsg);
|
|
|
- } else {
|
|
|
- bh->inreq->zero = 1;
|
|
|
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
|
|
|
- &bh->inreq_busy, &bh->state);
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * For Bulk-only, mark the end of the data with a short
|
|
|
- * packet. If we are allowed to stall, halt the bulk-in
|
|
|
- * endpoint. (Note: This violates the Bulk-Only Transport
|
|
|
- * specification, which requires us to pad the data if we
|
|
|
- * don't halt the endpoint. Presumably nobody will mind.)
|
|
|
- */
|
|
|
- else {
|
|
|
- bh->inreq->zero = 1;
|
|
|
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
|
|
|
- &bh->inreq_busy, &bh->state);
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- if (mod_data.can_stall)
|
|
|
- rc = halt_bulk_in_endpoint(fsg);
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- /* We have processed all we want from the data the host has sent.
|
|
|
- * There may still be outstanding bulk-out requests. */
|
|
|
- case DATA_DIR_FROM_HOST:
|
|
|
- if (fsg->residue == 0)
|
|
|
- ; // Nothing to receive
|
|
|
-
|
|
|
- /* Did the host stop sending unexpectedly early? */
|
|
|
- else if (fsg->short_packet_received) {
|
|
|
- raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
|
|
|
- rc = -EINTR;
|
|
|
- }
|
|
|
-
|
|
|
- /* We haven't processed all the incoming data. Even though
|
|
|
- * we may be allowed to stall, doing so would cause a race.
|
|
|
- * The controller may already have ACK'ed all the remaining
|
|
|
- * bulk-out packets, in which case the host wouldn't see a
|
|
|
- * STALL. Not realizing the endpoint was halted, it wouldn't
|
|
|
- * clear the halt -- leading to problems later on. */
|
|
|
-#if 0
|
|
|
- else if (mod_data.can_stall) {
|
|
|
- fsg_set_halt(fsg, fsg->bulk_out);
|
|
|
- raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
|
|
|
- rc = -EINTR;
|
|
|
- }
|
|
|
-#endif
|
|
|
-
|
|
|
- /* We can't stall. Read in the excess data and throw it
|
|
|
- * all away. */
|
|
|
- else
|
|
|
- rc = throw_away_data(fsg);
|
|
|
- break;
|
|
|
- }
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int send_status(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_lun *curlun = fsg->curlun;
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- int rc;
|
|
|
- u8 status = US_BULK_STAT_OK;
|
|
|
- u32 sd, sdinfo = 0;
|
|
|
-
|
|
|
- /* Wait for the next buffer to become available */
|
|
|
- bh = fsg->next_buffhd_to_fill;
|
|
|
- while (bh->state != BUF_STATE_EMPTY) {
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
-
|
|
|
- if (curlun) {
|
|
|
- sd = curlun->sense_data;
|
|
|
- sdinfo = curlun->sense_data_info;
|
|
|
- } else if (fsg->bad_lun_okay)
|
|
|
- sd = SS_NO_SENSE;
|
|
|
- else
|
|
|
- sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
|
|
|
-
|
|
|
- if (fsg->phase_error) {
|
|
|
- DBG(fsg, "sending phase-error status\n");
|
|
|
- status = US_BULK_STAT_PHASE;
|
|
|
- sd = SS_INVALID_COMMAND;
|
|
|
- } else if (sd != SS_NO_SENSE) {
|
|
|
- DBG(fsg, "sending command-failure status\n");
|
|
|
- status = US_BULK_STAT_FAIL;
|
|
|
- VDBG(fsg, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
|
|
|
- " info x%x\n",
|
|
|
- SK(sd), ASC(sd), ASCQ(sd), sdinfo);
|
|
|
- }
|
|
|
-
|
|
|
- if (transport_is_bbb()) {
|
|
|
- struct bulk_cs_wrap *csw = bh->buf;
|
|
|
-
|
|
|
- /* Store and send the Bulk-only CSW */
|
|
|
- csw->Signature = cpu_to_le32(US_BULK_CS_SIGN);
|
|
|
- csw->Tag = fsg->tag;
|
|
|
- csw->Residue = cpu_to_le32(fsg->residue);
|
|
|
- csw->Status = status;
|
|
|
-
|
|
|
- bh->inreq->length = US_BULK_CS_WRAP_LEN;
|
|
|
- bh->inreq->zero = 0;
|
|
|
- start_transfer(fsg, fsg->bulk_in, bh->inreq,
|
|
|
- &bh->inreq_busy, &bh->state);
|
|
|
-
|
|
|
- } else if (mod_data.transport_type == USB_PR_CB) {
|
|
|
-
|
|
|
- /* Control-Bulk transport has no status phase! */
|
|
|
- return 0;
|
|
|
-
|
|
|
- } else { // USB_PR_CBI
|
|
|
- struct interrupt_data *buf = bh->buf;
|
|
|
-
|
|
|
- /* Store and send the Interrupt data. UFI sends the ASC
|
|
|
- * and ASCQ bytes. Everything else sends a Type (which
|
|
|
- * is always 0) and the status Value. */
|
|
|
- if (mod_data.protocol_type == USB_SC_UFI) {
|
|
|
- buf->bType = ASC(sd);
|
|
|
- buf->bValue = ASCQ(sd);
|
|
|
- } else {
|
|
|
- buf->bType = 0;
|
|
|
- buf->bValue = status;
|
|
|
- }
|
|
|
- fsg->intreq->length = CBI_INTERRUPT_DATA_LEN;
|
|
|
-
|
|
|
- fsg->intr_buffhd = bh; // Point to the right buffhd
|
|
|
- fsg->intreq->buf = bh->inreq->buf;
|
|
|
- fsg->intreq->context = bh;
|
|
|
- start_transfer(fsg, fsg->intr_in, fsg->intreq,
|
|
|
- &fsg->intreq_busy, &bh->state);
|
|
|
- }
|
|
|
-
|
|
|
- fsg->next_buffhd_to_fill = bh->next;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-/* Check whether the command is properly formed and whether its data size
|
|
|
- * and direction agree with the values we already have. */
|
|
|
-static int check_command(struct fsg_dev *fsg, int cmnd_size,
|
|
|
- enum data_direction data_dir, unsigned int mask,
|
|
|
- int needs_medium, const char *name)
|
|
|
-{
|
|
|
- int i;
|
|
|
- int lun = fsg->cmnd[1] >> 5;
|
|
|
- static const char dirletter[4] = {'u', 'o', 'i', 'n'};
|
|
|
- char hdlen[20];
|
|
|
- struct fsg_lun *curlun;
|
|
|
-
|
|
|
- /* Adjust the expected cmnd_size for protocol encapsulation padding.
|
|
|
- * Transparent SCSI doesn't pad. */
|
|
|
- if (protocol_is_scsi())
|
|
|
- ;
|
|
|
-
|
|
|
- /* There's some disagreement as to whether RBC pads commands or not.
|
|
|
- * We'll play it safe and accept either form. */
|
|
|
- else if (mod_data.protocol_type == USB_SC_RBC) {
|
|
|
- if (fsg->cmnd_size == 12)
|
|
|
- cmnd_size = 12;
|
|
|
-
|
|
|
- /* All the other protocols pad to 12 bytes */
|
|
|
- } else
|
|
|
- cmnd_size = 12;
|
|
|
-
|
|
|
- hdlen[0] = 0;
|
|
|
- if (fsg->data_dir != DATA_DIR_UNKNOWN)
|
|
|
- sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir],
|
|
|
- fsg->data_size);
|
|
|
- VDBG(fsg, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
|
|
|
- name, cmnd_size, dirletter[(int) data_dir],
|
|
|
- fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen);
|
|
|
-
|
|
|
- /* We can't reply at all until we know the correct data direction
|
|
|
- * and size. */
|
|
|
- if (fsg->data_size_from_cmnd == 0)
|
|
|
- data_dir = DATA_DIR_NONE;
|
|
|
- if (fsg->data_dir == DATA_DIR_UNKNOWN) { // CB or CBI
|
|
|
- fsg->data_dir = data_dir;
|
|
|
- fsg->data_size = fsg->data_size_from_cmnd;
|
|
|
-
|
|
|
- } else { // Bulk-only
|
|
|
- if (fsg->data_size < fsg->data_size_from_cmnd) {
|
|
|
-
|
|
|
- /* Host data size < Device data size is a phase error.
|
|
|
- * Carry out the command, but only transfer as much
|
|
|
- * as we are allowed. */
|
|
|
- fsg->data_size_from_cmnd = fsg->data_size;
|
|
|
- fsg->phase_error = 1;
|
|
|
- }
|
|
|
- }
|
|
|
- fsg->residue = fsg->usb_amount_left = fsg->data_size;
|
|
|
-
|
|
|
- /* Conflicting data directions is a phase error */
|
|
|
- if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) {
|
|
|
- fsg->phase_error = 1;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Verify the length of the command itself */
|
|
|
- if (cmnd_size != fsg->cmnd_size) {
|
|
|
-
|
|
|
- /* Special case workaround: There are plenty of buggy SCSI
|
|
|
- * implementations. Many have issues with cbw->Length
|
|
|
- * field passing a wrong command size. For those cases we
|
|
|
- * always try to work around the problem by using the length
|
|
|
- * sent by the host side provided it is at least as large
|
|
|
- * as the correct command length.
|
|
|
- * Examples of such cases would be MS-Windows, which issues
|
|
|
- * REQUEST SENSE with cbw->Length == 12 where it should
|
|
|
- * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and
|
|
|
- * REQUEST SENSE with cbw->Length == 10 where it should
|
|
|
- * be 6 as well.
|
|
|
- */
|
|
|
- if (cmnd_size <= fsg->cmnd_size) {
|
|
|
- DBG(fsg, "%s is buggy! Expected length %d "
|
|
|
- "but we got %d\n", name,
|
|
|
- cmnd_size, fsg->cmnd_size);
|
|
|
- cmnd_size = fsg->cmnd_size;
|
|
|
- } else {
|
|
|
- fsg->phase_error = 1;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Check that the LUN values are consistent */
|
|
|
- if (transport_is_bbb()) {
|
|
|
- if (fsg->lun != lun)
|
|
|
- DBG(fsg, "using LUN %d from CBW, "
|
|
|
- "not LUN %d from CDB\n",
|
|
|
- fsg->lun, lun);
|
|
|
- }
|
|
|
-
|
|
|
- /* Check the LUN */
|
|
|
- curlun = fsg->curlun;
|
|
|
- if (curlun) {
|
|
|
- if (fsg->cmnd[0] != REQUEST_SENSE) {
|
|
|
- curlun->sense_data = SS_NO_SENSE;
|
|
|
- curlun->sense_data_info = 0;
|
|
|
- curlun->info_valid = 0;
|
|
|
- }
|
|
|
- } else {
|
|
|
- fsg->bad_lun_okay = 0;
|
|
|
-
|
|
|
- /* INQUIRY and REQUEST SENSE commands are explicitly allowed
|
|
|
- * to use unsupported LUNs; all others may not. */
|
|
|
- if (fsg->cmnd[0] != INQUIRY &&
|
|
|
- fsg->cmnd[0] != REQUEST_SENSE) {
|
|
|
- DBG(fsg, "unsupported LUN %d\n", fsg->lun);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* If a unit attention condition exists, only INQUIRY and
|
|
|
- * REQUEST SENSE commands are allowed; anything else must fail. */
|
|
|
- if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
|
|
|
- fsg->cmnd[0] != INQUIRY &&
|
|
|
- fsg->cmnd[0] != REQUEST_SENSE) {
|
|
|
- curlun->sense_data = curlun->unit_attention_data;
|
|
|
- curlun->unit_attention_data = SS_NO_SENSE;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Check that only command bytes listed in the mask are non-zero */
|
|
|
- fsg->cmnd[1] &= 0x1f; // Mask away the LUN
|
|
|
- for (i = 1; i < cmnd_size; ++i) {
|
|
|
- if (fsg->cmnd[i] && !(mask & (1 << i))) {
|
|
|
- if (curlun)
|
|
|
- curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* If the medium isn't mounted and the command needs to access
|
|
|
- * it, return an error. */
|
|
|
- if (curlun && !fsg_lun_is_open(curlun) && needs_medium) {
|
|
|
- curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* wrapper of check_command for data size in blocks handling */
|
|
|
-static int check_command_size_in_blocks(struct fsg_dev *fsg, int cmnd_size,
|
|
|
- enum data_direction data_dir, unsigned int mask,
|
|
|
- int needs_medium, const char *name)
|
|
|
-{
|
|
|
- if (fsg->curlun)
|
|
|
- fsg->data_size_from_cmnd <<= fsg->curlun->blkbits;
|
|
|
- return check_command(fsg, cmnd_size, data_dir,
|
|
|
- mask, needs_medium, name);
|
|
|
-}
|
|
|
-
|
|
|
-static int do_scsi_command(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- int rc;
|
|
|
- int reply = -EINVAL;
|
|
|
- int i;
|
|
|
- static char unknown[16];
|
|
|
-
|
|
|
- dump_cdb(fsg);
|
|
|
-
|
|
|
- /* Wait for the next buffer to become available for data or status */
|
|
|
- bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill;
|
|
|
- while (bh->state != BUF_STATE_EMPTY) {
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
- fsg->phase_error = 0;
|
|
|
- fsg->short_packet_received = 0;
|
|
|
-
|
|
|
- down_read(&fsg->filesem); // We're using the backing file
|
|
|
- switch (fsg->cmnd[0]) {
|
|
|
-
|
|
|
- case INQUIRY:
|
|
|
- fsg->data_size_from_cmnd = fsg->cmnd[4];
|
|
|
- if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
|
|
|
- (1<<4), 0,
|
|
|
- "INQUIRY")) == 0)
|
|
|
- reply = do_inquiry(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case MODE_SELECT:
|
|
|
- fsg->data_size_from_cmnd = fsg->cmnd[4];
|
|
|
- if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
|
|
|
- (1<<1) | (1<<4), 0,
|
|
|
- "MODE SELECT(6)")) == 0)
|
|
|
- reply = do_mode_select(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case MODE_SELECT_10:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
|
|
|
- (1<<1) | (3<<7), 0,
|
|
|
- "MODE SELECT(10)")) == 0)
|
|
|
- reply = do_mode_select(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case MODE_SENSE:
|
|
|
- fsg->data_size_from_cmnd = fsg->cmnd[4];
|
|
|
- if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
|
|
|
- (1<<1) | (1<<2) | (1<<4), 0,
|
|
|
- "MODE SENSE(6)")) == 0)
|
|
|
- reply = do_mode_sense(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case MODE_SENSE_10:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
|
|
|
- (1<<1) | (1<<2) | (3<<7), 0,
|
|
|
- "MODE SENSE(10)")) == 0)
|
|
|
- reply = do_mode_sense(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case ALLOW_MEDIUM_REMOVAL:
|
|
|
- fsg->data_size_from_cmnd = 0;
|
|
|
- if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
|
|
|
- (1<<4), 0,
|
|
|
- "PREVENT-ALLOW MEDIUM REMOVAL")) == 0)
|
|
|
- reply = do_prevent_allow(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_6:
|
|
|
- i = fsg->cmnd[4];
|
|
|
- fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
|
|
|
- if ((reply = check_command_size_in_blocks(fsg, 6,
|
|
|
- DATA_DIR_TO_HOST,
|
|
|
- (7<<1) | (1<<4), 1,
|
|
|
- "READ(6)")) == 0)
|
|
|
- reply = do_read(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_10:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command_size_in_blocks(fsg, 10,
|
|
|
- DATA_DIR_TO_HOST,
|
|
|
- (1<<1) | (0xf<<2) | (3<<7), 1,
|
|
|
- "READ(10)")) == 0)
|
|
|
- reply = do_read(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_12:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
|
|
|
- if ((reply = check_command_size_in_blocks(fsg, 12,
|
|
|
- DATA_DIR_TO_HOST,
|
|
|
- (1<<1) | (0xf<<2) | (0xf<<6), 1,
|
|
|
- "READ(12)")) == 0)
|
|
|
- reply = do_read(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_CAPACITY:
|
|
|
- fsg->data_size_from_cmnd = 8;
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
|
|
|
- (0xf<<2) | (1<<8), 1,
|
|
|
- "READ CAPACITY")) == 0)
|
|
|
- reply = do_read_capacity(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_HEADER:
|
|
|
- if (!mod_data.cdrom)
|
|
|
- goto unknown_cmnd;
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
|
|
|
- (3<<7) | (0x1f<<1), 1,
|
|
|
- "READ HEADER")) == 0)
|
|
|
- reply = do_read_header(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_TOC:
|
|
|
- if (!mod_data.cdrom)
|
|
|
- goto unknown_cmnd;
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
|
|
|
- (7<<6) | (1<<1), 1,
|
|
|
- "READ TOC")) == 0)
|
|
|
- reply = do_read_toc(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case READ_FORMAT_CAPACITIES:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
|
|
|
- (3<<7), 1,
|
|
|
- "READ FORMAT CAPACITIES")) == 0)
|
|
|
- reply = do_read_format_capacities(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case REQUEST_SENSE:
|
|
|
- fsg->data_size_from_cmnd = fsg->cmnd[4];
|
|
|
- if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
|
|
|
- (1<<4), 0,
|
|
|
- "REQUEST SENSE")) == 0)
|
|
|
- reply = do_request_sense(fsg, bh);
|
|
|
- break;
|
|
|
-
|
|
|
- case START_STOP:
|
|
|
- fsg->data_size_from_cmnd = 0;
|
|
|
- if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
|
|
|
- (1<<1) | (1<<4), 0,
|
|
|
- "START-STOP UNIT")) == 0)
|
|
|
- reply = do_start_stop(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case SYNCHRONIZE_CACHE:
|
|
|
- fsg->data_size_from_cmnd = 0;
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
|
|
|
- (0xf<<2) | (3<<7), 1,
|
|
|
- "SYNCHRONIZE CACHE")) == 0)
|
|
|
- reply = do_synchronize_cache(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case TEST_UNIT_READY:
|
|
|
- fsg->data_size_from_cmnd = 0;
|
|
|
- reply = check_command(fsg, 6, DATA_DIR_NONE,
|
|
|
- 0, 1,
|
|
|
- "TEST UNIT READY");
|
|
|
- break;
|
|
|
-
|
|
|
- /* Although optional, this command is used by MS-Windows. We
|
|
|
- * support a minimal version: BytChk must be 0. */
|
|
|
- case VERIFY:
|
|
|
- fsg->data_size_from_cmnd = 0;
|
|
|
- if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
|
|
|
- (1<<1) | (0xf<<2) | (3<<7), 1,
|
|
|
- "VERIFY")) == 0)
|
|
|
- reply = do_verify(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case WRITE_6:
|
|
|
- i = fsg->cmnd[4];
|
|
|
- fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
|
|
|
- if ((reply = check_command_size_in_blocks(fsg, 6,
|
|
|
- DATA_DIR_FROM_HOST,
|
|
|
- (7<<1) | (1<<4), 1,
|
|
|
- "WRITE(6)")) == 0)
|
|
|
- reply = do_write(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case WRITE_10:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
|
|
|
- if ((reply = check_command_size_in_blocks(fsg, 10,
|
|
|
- DATA_DIR_FROM_HOST,
|
|
|
- (1<<1) | (0xf<<2) | (3<<7), 1,
|
|
|
- "WRITE(10)")) == 0)
|
|
|
- reply = do_write(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case WRITE_12:
|
|
|
- fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
|
|
|
- if ((reply = check_command_size_in_blocks(fsg, 12,
|
|
|
- DATA_DIR_FROM_HOST,
|
|
|
- (1<<1) | (0xf<<2) | (0xf<<6), 1,
|
|
|
- "WRITE(12)")) == 0)
|
|
|
- reply = do_write(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- /* Some mandatory commands that we recognize but don't implement.
|
|
|
- * They don't mean much in this setting. It's left as an exercise
|
|
|
- * for anyone interested to implement RESERVE and RELEASE in terms
|
|
|
- * of Posix locks. */
|
|
|
- case FORMAT_UNIT:
|
|
|
- case RELEASE:
|
|
|
- case RESERVE:
|
|
|
- case SEND_DIAGNOSTIC:
|
|
|
- // Fall through
|
|
|
-
|
|
|
- default:
|
|
|
- unknown_cmnd:
|
|
|
- fsg->data_size_from_cmnd = 0;
|
|
|
- sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]);
|
|
|
- if ((reply = check_command(fsg, fsg->cmnd_size,
|
|
|
- DATA_DIR_UNKNOWN, ~0, 0, unknown)) == 0) {
|
|
|
- fsg->curlun->sense_data = SS_INVALID_COMMAND;
|
|
|
- reply = -EINVAL;
|
|
|
- }
|
|
|
- break;
|
|
|
- }
|
|
|
- up_read(&fsg->filesem);
|
|
|
-
|
|
|
- if (reply == -EINTR || signal_pending(current))
|
|
|
- return -EINTR;
|
|
|
-
|
|
|
- /* Set up the single reply buffer for finish_reply() */
|
|
|
- if (reply == -EINVAL)
|
|
|
- reply = 0; // Error reply length
|
|
|
- if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) {
|
|
|
- reply = min((u32) reply, fsg->data_size_from_cmnd);
|
|
|
- bh->inreq->length = reply;
|
|
|
- bh->state = BUF_STATE_FULL;
|
|
|
- fsg->residue -= reply;
|
|
|
- } // Otherwise it's already set
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
|
|
|
-{
|
|
|
- struct usb_request *req = bh->outreq;
|
|
|
- struct bulk_cb_wrap *cbw = req->buf;
|
|
|
-
|
|
|
- /* Was this a real packet? Should it be ignored? */
|
|
|
- if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- /* Is the CBW valid? */
|
|
|
- if (req->actual != US_BULK_CB_WRAP_LEN ||
|
|
|
- cbw->Signature != cpu_to_le32(
|
|
|
- US_BULK_CB_SIGN)) {
|
|
|
- DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
|
|
|
- req->actual,
|
|
|
- le32_to_cpu(cbw->Signature));
|
|
|
-
|
|
|
- /* The Bulk-only spec says we MUST stall the IN endpoint
|
|
|
- * (6.6.1), so it's unavoidable. It also says we must
|
|
|
- * retain this state until the next reset, but there's
|
|
|
- * no way to tell the controller driver it should ignore
|
|
|
- * Clear-Feature(HALT) requests.
|
|
|
- *
|
|
|
- * We aren't required to halt the OUT endpoint; instead
|
|
|
- * we can simply accept and discard any data received
|
|
|
- * until the next reset. */
|
|
|
- wedge_bulk_in_endpoint(fsg);
|
|
|
- set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Is the CBW meaningful? */
|
|
|
- if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN ||
|
|
|
- cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) {
|
|
|
- DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
|
|
|
- "cmdlen %u\n",
|
|
|
- cbw->Lun, cbw->Flags, cbw->Length);
|
|
|
-
|
|
|
- /* We can do anything we want here, so let's stall the
|
|
|
- * bulk pipes if we are allowed to. */
|
|
|
- if (mod_data.can_stall) {
|
|
|
- fsg_set_halt(fsg, fsg->bulk_out);
|
|
|
- halt_bulk_in_endpoint(fsg);
|
|
|
- }
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Save the command for later */
|
|
|
- fsg->cmnd_size = cbw->Length;
|
|
|
- memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size);
|
|
|
- if (cbw->Flags & US_BULK_FLAG_IN)
|
|
|
- fsg->data_dir = DATA_DIR_TO_HOST;
|
|
|
- else
|
|
|
- fsg->data_dir = DATA_DIR_FROM_HOST;
|
|
|
- fsg->data_size = le32_to_cpu(cbw->DataTransferLength);
|
|
|
- if (fsg->data_size == 0)
|
|
|
- fsg->data_dir = DATA_DIR_NONE;
|
|
|
- fsg->lun = cbw->Lun;
|
|
|
- fsg->tag = cbw->Tag;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int get_next_command(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- int rc = 0;
|
|
|
-
|
|
|
- if (transport_is_bbb()) {
|
|
|
-
|
|
|
- /* Wait for the next buffer to become available */
|
|
|
- bh = fsg->next_buffhd_to_fill;
|
|
|
- while (bh->state != BUF_STATE_EMPTY) {
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
-
|
|
|
- /* Queue a request to read a Bulk-only CBW */
|
|
|
- set_bulk_out_req_length(fsg, bh, US_BULK_CB_WRAP_LEN);
|
|
|
- start_transfer(fsg, fsg->bulk_out, bh->outreq,
|
|
|
- &bh->outreq_busy, &bh->state);
|
|
|
-
|
|
|
- /* We will drain the buffer in software, which means we
|
|
|
- * can reuse it for the next filling. No need to advance
|
|
|
- * next_buffhd_to_fill. */
|
|
|
-
|
|
|
- /* Wait for the CBW to arrive */
|
|
|
- while (bh->state != BUF_STATE_FULL) {
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
- smp_rmb();
|
|
|
- rc = received_cbw(fsg, bh);
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
-
|
|
|
- } else { // USB_PR_CB or USB_PR_CBI
|
|
|
-
|
|
|
- /* Wait for the next command to arrive */
|
|
|
- while (fsg->cbbuf_cmnd_size == 0) {
|
|
|
- rc = sleep_thread(fsg);
|
|
|
- if (rc)
|
|
|
- return rc;
|
|
|
- }
|
|
|
-
|
|
|
- /* Is the previous status interrupt request still busy?
|
|
|
- * The host is allowed to skip reading the status,
|
|
|
- * so we must cancel it. */
|
|
|
- if (fsg->intreq_busy)
|
|
|
- usb_ep_dequeue(fsg->intr_in, fsg->intreq);
|
|
|
-
|
|
|
- /* Copy the command and mark the buffer empty */
|
|
|
- fsg->data_dir = DATA_DIR_UNKNOWN;
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- fsg->cmnd_size = fsg->cbbuf_cmnd_size;
|
|
|
- memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size);
|
|
|
- fsg->cbbuf_cmnd_size = 0;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
-
|
|
|
- /* Use LUN from the command */
|
|
|
- fsg->lun = fsg->cmnd[1] >> 5;
|
|
|
- }
|
|
|
-
|
|
|
- /* Update current lun */
|
|
|
- if (fsg->lun >= 0 && fsg->lun < fsg->nluns)
|
|
|
- fsg->curlun = &fsg->luns[fsg->lun];
|
|
|
- else
|
|
|
- fsg->curlun = NULL;
|
|
|
-
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
|
|
|
- const struct usb_endpoint_descriptor *d)
|
|
|
-{
|
|
|
- int rc;
|
|
|
-
|
|
|
- ep->driver_data = fsg;
|
|
|
- ep->desc = d;
|
|
|
- rc = usb_ep_enable(ep);
|
|
|
- if (rc)
|
|
|
- ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep,
|
|
|
- struct usb_request **preq)
|
|
|
-{
|
|
|
- *preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
|
|
|
- if (*preq)
|
|
|
- return 0;
|
|
|
- ERROR(fsg, "can't allocate request for %s\n", ep->name);
|
|
|
- return -ENOMEM;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Reset interface setting and re-init endpoint state (toggle etc).
|
|
|
- * Call with altsetting < 0 to disable the interface. The only other
|
|
|
- * available altsetting is 0, which enables the interface.
|
|
|
- */
|
|
|
-static int do_set_interface(struct fsg_dev *fsg, int altsetting)
|
|
|
-{
|
|
|
- int rc = 0;
|
|
|
- int i;
|
|
|
- const struct usb_endpoint_descriptor *d;
|
|
|
-
|
|
|
- if (fsg->running)
|
|
|
- DBG(fsg, "reset interface\n");
|
|
|
-
|
|
|
-reset:
|
|
|
- /* Deallocate the requests */
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i) {
|
|
|
- struct fsg_buffhd *bh = &fsg->buffhds[i];
|
|
|
-
|
|
|
- if (bh->inreq) {
|
|
|
- usb_ep_free_request(fsg->bulk_in, bh->inreq);
|
|
|
- bh->inreq = NULL;
|
|
|
- }
|
|
|
- if (bh->outreq) {
|
|
|
- usb_ep_free_request(fsg->bulk_out, bh->outreq);
|
|
|
- bh->outreq = NULL;
|
|
|
- }
|
|
|
- }
|
|
|
- if (fsg->intreq) {
|
|
|
- usb_ep_free_request(fsg->intr_in, fsg->intreq);
|
|
|
- fsg->intreq = NULL;
|
|
|
- }
|
|
|
-
|
|
|
- /* Disable the endpoints */
|
|
|
- if (fsg->bulk_in_enabled) {
|
|
|
- usb_ep_disable(fsg->bulk_in);
|
|
|
- fsg->bulk_in_enabled = 0;
|
|
|
- }
|
|
|
- if (fsg->bulk_out_enabled) {
|
|
|
- usb_ep_disable(fsg->bulk_out);
|
|
|
- fsg->bulk_out_enabled = 0;
|
|
|
- }
|
|
|
- if (fsg->intr_in_enabled) {
|
|
|
- usb_ep_disable(fsg->intr_in);
|
|
|
- fsg->intr_in_enabled = 0;
|
|
|
- }
|
|
|
-
|
|
|
- fsg->running = 0;
|
|
|
- if (altsetting < 0 || rc != 0)
|
|
|
- return rc;
|
|
|
-
|
|
|
- DBG(fsg, "set interface %d\n", altsetting);
|
|
|
-
|
|
|
- /* Enable the endpoints */
|
|
|
- d = fsg_ep_desc(fsg->gadget,
|
|
|
- &fsg_fs_bulk_in_desc, &fsg_hs_bulk_in_desc,
|
|
|
- &fsg_ss_bulk_in_desc);
|
|
|
- if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0)
|
|
|
- goto reset;
|
|
|
- fsg->bulk_in_enabled = 1;
|
|
|
-
|
|
|
- d = fsg_ep_desc(fsg->gadget,
|
|
|
- &fsg_fs_bulk_out_desc, &fsg_hs_bulk_out_desc,
|
|
|
- &fsg_ss_bulk_out_desc);
|
|
|
- if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0)
|
|
|
- goto reset;
|
|
|
- fsg->bulk_out_enabled = 1;
|
|
|
- fsg->bulk_out_maxpacket = usb_endpoint_maxp(d);
|
|
|
- clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
|
|
|
-
|
|
|
- if (transport_is_cbi()) {
|
|
|
- d = fsg_ep_desc(fsg->gadget,
|
|
|
- &fsg_fs_intr_in_desc, &fsg_hs_intr_in_desc,
|
|
|
- &fsg_ss_intr_in_desc);
|
|
|
- if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0)
|
|
|
- goto reset;
|
|
|
- fsg->intr_in_enabled = 1;
|
|
|
- }
|
|
|
-
|
|
|
- /* Allocate the requests */
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i) {
|
|
|
- struct fsg_buffhd *bh = &fsg->buffhds[i];
|
|
|
-
|
|
|
- if ((rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq)) != 0)
|
|
|
- goto reset;
|
|
|
- if ((rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq)) != 0)
|
|
|
- goto reset;
|
|
|
- bh->inreq->buf = bh->outreq->buf = bh->buf;
|
|
|
- bh->inreq->context = bh->outreq->context = bh;
|
|
|
- bh->inreq->complete = bulk_in_complete;
|
|
|
- bh->outreq->complete = bulk_out_complete;
|
|
|
- }
|
|
|
- if (transport_is_cbi()) {
|
|
|
- if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0)
|
|
|
- goto reset;
|
|
|
- fsg->intreq->complete = intr_in_complete;
|
|
|
- }
|
|
|
-
|
|
|
- fsg->running = 1;
|
|
|
- for (i = 0; i < fsg->nluns; ++i)
|
|
|
- fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*
|
|
|
- * Change our operational configuration. This code must agree with the code
|
|
|
- * that returns config descriptors, and with interface altsetting code.
|
|
|
- *
|
|
|
- * It's also responsible for power management interactions. Some
|
|
|
- * configurations might not work with our current power sources.
|
|
|
- * For now we just assume the gadget is always self-powered.
|
|
|
- */
|
|
|
-static int do_set_config(struct fsg_dev *fsg, u8 new_config)
|
|
|
-{
|
|
|
- int rc = 0;
|
|
|
-
|
|
|
- /* Disable the single interface */
|
|
|
- if (fsg->config != 0) {
|
|
|
- DBG(fsg, "reset config\n");
|
|
|
- fsg->config = 0;
|
|
|
- rc = do_set_interface(fsg, -1);
|
|
|
- }
|
|
|
-
|
|
|
- /* Enable the interface */
|
|
|
- if (new_config != 0) {
|
|
|
- fsg->config = new_config;
|
|
|
- if ((rc = do_set_interface(fsg, 0)) != 0)
|
|
|
- fsg->config = 0; // Reset on errors
|
|
|
- else
|
|
|
- INFO(fsg, "%s config #%d\n",
|
|
|
- usb_speed_string(fsg->gadget->speed),
|
|
|
- fsg->config);
|
|
|
- }
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static void handle_exception(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- siginfo_t info;
|
|
|
- int sig;
|
|
|
- int i;
|
|
|
- int num_active;
|
|
|
- struct fsg_buffhd *bh;
|
|
|
- enum fsg_state old_state;
|
|
|
- u8 new_config;
|
|
|
- struct fsg_lun *curlun;
|
|
|
- unsigned int exception_req_tag;
|
|
|
- int rc;
|
|
|
-
|
|
|
- /* Clear the existing signals. Anything but SIGUSR1 is converted
|
|
|
- * into a high-priority EXIT exception. */
|
|
|
- for (;;) {
|
|
|
- sig = dequeue_signal_lock(current, ¤t->blocked, &info);
|
|
|
- if (!sig)
|
|
|
- break;
|
|
|
- if (sig != SIGUSR1) {
|
|
|
- if (fsg->state < FSG_STATE_EXIT)
|
|
|
- DBG(fsg, "Main thread exiting on signal\n");
|
|
|
- raise_exception(fsg, FSG_STATE_EXIT);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Cancel all the pending transfers */
|
|
|
- if (fsg->intreq_busy)
|
|
|
- usb_ep_dequeue(fsg->intr_in, fsg->intreq);
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i) {
|
|
|
- bh = &fsg->buffhds[i];
|
|
|
- if (bh->inreq_busy)
|
|
|
- usb_ep_dequeue(fsg->bulk_in, bh->inreq);
|
|
|
- if (bh->outreq_busy)
|
|
|
- usb_ep_dequeue(fsg->bulk_out, bh->outreq);
|
|
|
- }
|
|
|
-
|
|
|
- /* Wait until everything is idle */
|
|
|
- for (;;) {
|
|
|
- num_active = fsg->intreq_busy;
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i) {
|
|
|
- bh = &fsg->buffhds[i];
|
|
|
- num_active += bh->inreq_busy + bh->outreq_busy;
|
|
|
- }
|
|
|
- if (num_active == 0)
|
|
|
- break;
|
|
|
- if (sleep_thread(fsg))
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- /* Clear out the controller's fifos */
|
|
|
- if (fsg->bulk_in_enabled)
|
|
|
- usb_ep_fifo_flush(fsg->bulk_in);
|
|
|
- if (fsg->bulk_out_enabled)
|
|
|
- usb_ep_fifo_flush(fsg->bulk_out);
|
|
|
- if (fsg->intr_in_enabled)
|
|
|
- usb_ep_fifo_flush(fsg->intr_in);
|
|
|
-
|
|
|
- /* Reset the I/O buffer states and pointers, the SCSI
|
|
|
- * state, and the exception. Then invoke the handler. */
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
-
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i) {
|
|
|
- bh = &fsg->buffhds[i];
|
|
|
- bh->state = BUF_STATE_EMPTY;
|
|
|
- }
|
|
|
- fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain =
|
|
|
- &fsg->buffhds[0];
|
|
|
-
|
|
|
- exception_req_tag = fsg->exception_req_tag;
|
|
|
- new_config = fsg->new_config;
|
|
|
- old_state = fsg->state;
|
|
|
-
|
|
|
- if (old_state == FSG_STATE_ABORT_BULK_OUT)
|
|
|
- fsg->state = FSG_STATE_STATUS_PHASE;
|
|
|
- else {
|
|
|
- for (i = 0; i < fsg->nluns; ++i) {
|
|
|
- curlun = &fsg->luns[i];
|
|
|
- curlun->prevent_medium_removal = 0;
|
|
|
- curlun->sense_data = curlun->unit_attention_data =
|
|
|
- SS_NO_SENSE;
|
|
|
- curlun->sense_data_info = 0;
|
|
|
- curlun->info_valid = 0;
|
|
|
- }
|
|
|
- fsg->state = FSG_STATE_IDLE;
|
|
|
- }
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
-
|
|
|
- /* Carry out any extra actions required for the exception */
|
|
|
- switch (old_state) {
|
|
|
- default:
|
|
|
- break;
|
|
|
-
|
|
|
- case FSG_STATE_ABORT_BULK_OUT:
|
|
|
- send_status(fsg);
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- if (fsg->state == FSG_STATE_STATUS_PHASE)
|
|
|
- fsg->state = FSG_STATE_IDLE;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
- break;
|
|
|
-
|
|
|
- case FSG_STATE_RESET:
|
|
|
- /* In case we were forced against our will to halt a
|
|
|
- * bulk endpoint, clear the halt now. (The SuperH UDC
|
|
|
- * requires this.) */
|
|
|
- if (test_and_clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags))
|
|
|
- usb_ep_clear_halt(fsg->bulk_in);
|
|
|
-
|
|
|
- if (transport_is_bbb()) {
|
|
|
- if (fsg->ep0_req_tag == exception_req_tag)
|
|
|
- ep0_queue(fsg); // Complete the status stage
|
|
|
-
|
|
|
- } else if (transport_is_cbi())
|
|
|
- send_status(fsg); // Status by interrupt pipe
|
|
|
-
|
|
|
- /* Technically this should go here, but it would only be
|
|
|
- * a waste of time. Ditto for the INTERFACE_CHANGE and
|
|
|
- * CONFIG_CHANGE cases. */
|
|
|
- // for (i = 0; i < fsg->nluns; ++i)
|
|
|
- // fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
|
|
|
- break;
|
|
|
-
|
|
|
- case FSG_STATE_INTERFACE_CHANGE:
|
|
|
- rc = do_set_interface(fsg, 0);
|
|
|
- if (fsg->ep0_req_tag != exception_req_tag)
|
|
|
- break;
|
|
|
- if (rc != 0) // STALL on errors
|
|
|
- fsg_set_halt(fsg, fsg->ep0);
|
|
|
- else // Complete the status stage
|
|
|
- ep0_queue(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case FSG_STATE_CONFIG_CHANGE:
|
|
|
- rc = do_set_config(fsg, new_config);
|
|
|
- if (fsg->ep0_req_tag != exception_req_tag)
|
|
|
- break;
|
|
|
- if (rc != 0) // STALL on errors
|
|
|
- fsg_set_halt(fsg, fsg->ep0);
|
|
|
- else // Complete the status stage
|
|
|
- ep0_queue(fsg);
|
|
|
- break;
|
|
|
-
|
|
|
- case FSG_STATE_DISCONNECT:
|
|
|
- for (i = 0; i < fsg->nluns; ++i)
|
|
|
- fsg_lun_fsync_sub(fsg->luns + i);
|
|
|
- do_set_config(fsg, 0); // Unconfigured state
|
|
|
- break;
|
|
|
-
|
|
|
- case FSG_STATE_EXIT:
|
|
|
- case FSG_STATE_TERMINATED:
|
|
|
- do_set_config(fsg, 0); // Free resources
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- fsg->state = FSG_STATE_TERMINATED; // Stop the thread
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static int fsg_main_thread(void *fsg_)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = fsg_;
|
|
|
-
|
|
|
- /* Allow the thread to be killed by a signal, but set the signal mask
|
|
|
- * to block everything but INT, TERM, KILL, and USR1. */
|
|
|
- allow_signal(SIGINT);
|
|
|
- allow_signal(SIGTERM);
|
|
|
- allow_signal(SIGKILL);
|
|
|
- allow_signal(SIGUSR1);
|
|
|
-
|
|
|
- /* Allow the thread to be frozen */
|
|
|
- set_freezable();
|
|
|
-
|
|
|
- /* Arrange for userspace references to be interpreted as kernel
|
|
|
- * pointers. That way we can pass a kernel pointer to a routine
|
|
|
- * that expects a __user pointer and it will work okay. */
|
|
|
- set_fs(get_ds());
|
|
|
-
|
|
|
- /* The main loop */
|
|
|
- while (fsg->state != FSG_STATE_TERMINATED) {
|
|
|
- if (exception_in_progress(fsg) || signal_pending(current)) {
|
|
|
- handle_exception(fsg);
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- if (!fsg->running) {
|
|
|
- sleep_thread(fsg);
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- if (get_next_command(fsg))
|
|
|
- continue;
|
|
|
-
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- if (!exception_in_progress(fsg))
|
|
|
- fsg->state = FSG_STATE_DATA_PHASE;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
-
|
|
|
- if (do_scsi_command(fsg) || finish_reply(fsg))
|
|
|
- continue;
|
|
|
-
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- if (!exception_in_progress(fsg))
|
|
|
- fsg->state = FSG_STATE_STATUS_PHASE;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
-
|
|
|
- if (send_status(fsg))
|
|
|
- continue;
|
|
|
-
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- if (!exception_in_progress(fsg))
|
|
|
- fsg->state = FSG_STATE_IDLE;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
- }
|
|
|
-
|
|
|
- spin_lock_irq(&fsg->lock);
|
|
|
- fsg->thread_task = NULL;
|
|
|
- spin_unlock_irq(&fsg->lock);
|
|
|
-
|
|
|
- /* If we are exiting because of a signal, unregister the
|
|
|
- * gadget driver. */
|
|
|
- if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags))
|
|
|
- usb_gadget_unregister_driver(&fsg_driver);
|
|
|
-
|
|
|
- /* Let the unbind and cleanup routines know the thread has exited */
|
|
|
- complete_and_exit(&fsg->thread_notifier, 0);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-
|
|
|
-/* The write permissions and store_xxx pointers are set in fsg_bind() */
|
|
|
-static DEVICE_ATTR(ro, 0444, fsg_show_ro, NULL);
|
|
|
-static DEVICE_ATTR(nofua, 0644, fsg_show_nofua, NULL);
|
|
|
-static DEVICE_ATTR(file, 0444, fsg_show_file, NULL);
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static void fsg_release(struct kref *ref)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = container_of(ref, struct fsg_dev, ref);
|
|
|
-
|
|
|
- kfree(fsg->luns);
|
|
|
- kfree(fsg);
|
|
|
-}
|
|
|
-
|
|
|
-static void lun_release(struct device *dev)
|
|
|
-{
|
|
|
- struct rw_semaphore *filesem = dev_get_drvdata(dev);
|
|
|
- struct fsg_dev *fsg =
|
|
|
- container_of(filesem, struct fsg_dev, filesem);
|
|
|
-
|
|
|
- kref_put(&fsg->ref, fsg_release);
|
|
|
-}
|
|
|
-
|
|
|
-static void /* __init_or_exit */ fsg_unbind(struct usb_gadget *gadget)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = get_gadget_data(gadget);
|
|
|
- int i;
|
|
|
- struct fsg_lun *curlun;
|
|
|
- struct usb_request *req = fsg->ep0req;
|
|
|
-
|
|
|
- DBG(fsg, "unbind\n");
|
|
|
- clear_bit(REGISTERED, &fsg->atomic_bitflags);
|
|
|
-
|
|
|
- /* If the thread isn't already dead, tell it to exit now */
|
|
|
- if (fsg->state != FSG_STATE_TERMINATED) {
|
|
|
- raise_exception(fsg, FSG_STATE_EXIT);
|
|
|
- wait_for_completion(&fsg->thread_notifier);
|
|
|
-
|
|
|
- /* The cleanup routine waits for this completion also */
|
|
|
- complete(&fsg->thread_notifier);
|
|
|
- }
|
|
|
-
|
|
|
- /* Unregister the sysfs attribute files and the LUNs */
|
|
|
- for (i = 0; i < fsg->nluns; ++i) {
|
|
|
- curlun = &fsg->luns[i];
|
|
|
- if (curlun->registered) {
|
|
|
- device_remove_file(&curlun->dev, &dev_attr_nofua);
|
|
|
- device_remove_file(&curlun->dev, &dev_attr_ro);
|
|
|
- device_remove_file(&curlun->dev, &dev_attr_file);
|
|
|
- fsg_lun_close(curlun);
|
|
|
- device_unregister(&curlun->dev);
|
|
|
- curlun->registered = 0;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Free the data buffers */
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i)
|
|
|
- kfree(fsg->buffhds[i].buf);
|
|
|
-
|
|
|
- /* Free the request and buffer for endpoint 0 */
|
|
|
- if (req) {
|
|
|
- kfree(req->buf);
|
|
|
- usb_ep_free_request(fsg->ep0, req);
|
|
|
- }
|
|
|
-
|
|
|
- set_gadget_data(gadget, NULL);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int __init check_parameters(struct fsg_dev *fsg)
|
|
|
-{
|
|
|
- int prot;
|
|
|
-
|
|
|
- /* Store the default values */
|
|
|
- mod_data.transport_type = USB_PR_BULK;
|
|
|
- mod_data.transport_name = "Bulk-only";
|
|
|
- mod_data.protocol_type = USB_SC_SCSI;
|
|
|
- mod_data.protocol_name = "Transparent SCSI";
|
|
|
-
|
|
|
- /* Some peripheral controllers are known not to be able to
|
|
|
- * halt bulk endpoints correctly. If one of them is present,
|
|
|
- * disable stalls.
|
|
|
- */
|
|
|
- if (gadget_is_at91(fsg->gadget))
|
|
|
- mod_data.can_stall = 0;
|
|
|
-
|
|
|
- if (mod_data.release == 0xffff)
|
|
|
- mod_data.release = get_default_bcdDevice();
|
|
|
-
|
|
|
- prot = simple_strtol(mod_data.protocol_parm, NULL, 0);
|
|
|
-
|
|
|
-#ifdef CONFIG_USB_FILE_STORAGE_TEST
|
|
|
- if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) {
|
|
|
- ; // Use default setting
|
|
|
- } else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) {
|
|
|
- mod_data.transport_type = USB_PR_CB;
|
|
|
- mod_data.transport_name = "Control-Bulk";
|
|
|
- } else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) {
|
|
|
- mod_data.transport_type = USB_PR_CBI;
|
|
|
- mod_data.transport_name = "Control-Bulk-Interrupt";
|
|
|
- } else {
|
|
|
- ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 ||
|
|
|
- prot == USB_SC_SCSI) {
|
|
|
- ; // Use default setting
|
|
|
- } else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 ||
|
|
|
- prot == USB_SC_RBC) {
|
|
|
- mod_data.protocol_type = USB_SC_RBC;
|
|
|
- mod_data.protocol_name = "RBC";
|
|
|
- } else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 ||
|
|
|
- strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 ||
|
|
|
- prot == USB_SC_8020) {
|
|
|
- mod_data.protocol_type = USB_SC_8020;
|
|
|
- mod_data.protocol_name = "8020i (ATAPI)";
|
|
|
- } else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 ||
|
|
|
- prot == USB_SC_QIC) {
|
|
|
- mod_data.protocol_type = USB_SC_QIC;
|
|
|
- mod_data.protocol_name = "QIC-157";
|
|
|
- } else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 ||
|
|
|
- prot == USB_SC_UFI) {
|
|
|
- mod_data.protocol_type = USB_SC_UFI;
|
|
|
- mod_data.protocol_name = "UFI";
|
|
|
- } else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 ||
|
|
|
- prot == USB_SC_8070) {
|
|
|
- mod_data.protocol_type = USB_SC_8070;
|
|
|
- mod_data.protocol_name = "8070i";
|
|
|
- } else {
|
|
|
- ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- mod_data.buflen &= PAGE_CACHE_MASK;
|
|
|
- if (mod_data.buflen <= 0) {
|
|
|
- ERROR(fsg, "invalid buflen\n");
|
|
|
- return -ETOOSMALL;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* CONFIG_USB_FILE_STORAGE_TEST */
|
|
|
-
|
|
|
- /* Serial string handling.
|
|
|
- * On a real device, the serial string would be loaded
|
|
|
- * from permanent storage. */
|
|
|
- if (mod_data.serial) {
|
|
|
- const char *ch;
|
|
|
- unsigned len = 0;
|
|
|
-
|
|
|
- /* Sanity check :
|
|
|
- * The CB[I] specification limits the serial string to
|
|
|
- * 12 uppercase hexadecimal characters.
|
|
|
- * BBB need at least 12 uppercase hexadecimal characters,
|
|
|
- * with a maximum of 126. */
|
|
|
- for (ch = mod_data.serial; *ch; ++ch) {
|
|
|
- ++len;
|
|
|
- if ((*ch < '0' || *ch > '9') &&
|
|
|
- (*ch < 'A' || *ch > 'F')) { /* not uppercase hex */
|
|
|
- WARNING(fsg,
|
|
|
- "Invalid serial string character: %c\n",
|
|
|
- *ch);
|
|
|
- goto no_serial;
|
|
|
- }
|
|
|
- }
|
|
|
- if (len > 126 ||
|
|
|
- (mod_data.transport_type == USB_PR_BULK && len < 12) ||
|
|
|
- (mod_data.transport_type != USB_PR_BULK && len > 12)) {
|
|
|
- WARNING(fsg, "Invalid serial string length!\n");
|
|
|
- goto no_serial;
|
|
|
- }
|
|
|
- fsg_strings[FSG_STRING_SERIAL - 1].s = mod_data.serial;
|
|
|
- } else {
|
|
|
- WARNING(fsg, "No serial-number string provided!\n");
|
|
|
- no_serial:
|
|
|
- device_desc.iSerialNumber = 0;
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int __init fsg_bind(struct usb_gadget *gadget,
|
|
|
- struct usb_gadget_driver *driver)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = the_fsg;
|
|
|
- int rc;
|
|
|
- int i;
|
|
|
- struct fsg_lun *curlun;
|
|
|
- struct usb_ep *ep;
|
|
|
- struct usb_request *req;
|
|
|
- char *pathbuf, *p;
|
|
|
-
|
|
|
- fsg->gadget = gadget;
|
|
|
- set_gadget_data(gadget, fsg);
|
|
|
- fsg->ep0 = gadget->ep0;
|
|
|
- fsg->ep0->driver_data = fsg;
|
|
|
-
|
|
|
- if ((rc = check_parameters(fsg)) != 0)
|
|
|
- goto out;
|
|
|
-
|
|
|
- if (mod_data.removable) { // Enable the store_xxx attributes
|
|
|
- dev_attr_file.attr.mode = 0644;
|
|
|
- dev_attr_file.store = fsg_store_file;
|
|
|
- if (!mod_data.cdrom) {
|
|
|
- dev_attr_ro.attr.mode = 0644;
|
|
|
- dev_attr_ro.store = fsg_store_ro;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Only for removable media? */
|
|
|
- dev_attr_nofua.attr.mode = 0644;
|
|
|
- dev_attr_nofua.store = fsg_store_nofua;
|
|
|
-
|
|
|
- /* Find out how many LUNs there should be */
|
|
|
- i = mod_data.nluns;
|
|
|
- if (i == 0)
|
|
|
- i = max(mod_data.num_filenames, 1u);
|
|
|
- if (i > FSG_MAX_LUNS) {
|
|
|
- ERROR(fsg, "invalid number of LUNs: %d\n", i);
|
|
|
- rc = -EINVAL;
|
|
|
- goto out;
|
|
|
- }
|
|
|
-
|
|
|
- /* Create the LUNs, open their backing files, and register the
|
|
|
- * LUN devices in sysfs. */
|
|
|
- fsg->luns = kzalloc(i * sizeof(struct fsg_lun), GFP_KERNEL);
|
|
|
- if (!fsg->luns) {
|
|
|
- rc = -ENOMEM;
|
|
|
- goto out;
|
|
|
- }
|
|
|
- fsg->nluns = i;
|
|
|
-
|
|
|
- for (i = 0; i < fsg->nluns; ++i) {
|
|
|
- curlun = &fsg->luns[i];
|
|
|
- curlun->cdrom = !!mod_data.cdrom;
|
|
|
- curlun->ro = mod_data.cdrom || mod_data.ro[i];
|
|
|
- curlun->initially_ro = curlun->ro;
|
|
|
- curlun->removable = mod_data.removable;
|
|
|
- curlun->nofua = mod_data.nofua[i];
|
|
|
- curlun->dev.release = lun_release;
|
|
|
- curlun->dev.parent = &gadget->dev;
|
|
|
- curlun->dev.driver = &fsg_driver.driver;
|
|
|
- dev_set_drvdata(&curlun->dev, &fsg->filesem);
|
|
|
- dev_set_name(&curlun->dev,"%s-lun%d",
|
|
|
- dev_name(&gadget->dev), i);
|
|
|
-
|
|
|
- kref_get(&fsg->ref);
|
|
|
- rc = device_register(&curlun->dev);
|
|
|
- if (rc) {
|
|
|
- INFO(fsg, "failed to register LUN%d: %d\n", i, rc);
|
|
|
- put_device(&curlun->dev);
|
|
|
- goto out;
|
|
|
- }
|
|
|
- curlun->registered = 1;
|
|
|
-
|
|
|
- rc = device_create_file(&curlun->dev, &dev_attr_ro);
|
|
|
- if (rc)
|
|
|
- goto out;
|
|
|
- rc = device_create_file(&curlun->dev, &dev_attr_nofua);
|
|
|
- if (rc)
|
|
|
- goto out;
|
|
|
- rc = device_create_file(&curlun->dev, &dev_attr_file);
|
|
|
- if (rc)
|
|
|
- goto out;
|
|
|
-
|
|
|
- if (mod_data.file[i] && *mod_data.file[i]) {
|
|
|
- rc = fsg_lun_open(curlun, mod_data.file[i]);
|
|
|
- if (rc)
|
|
|
- goto out;
|
|
|
- } else if (!mod_data.removable) {
|
|
|
- ERROR(fsg, "no file given for LUN%d\n", i);
|
|
|
- rc = -EINVAL;
|
|
|
- goto out;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Find all the endpoints we will use */
|
|
|
- usb_ep_autoconfig_reset(gadget);
|
|
|
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
|
|
|
- if (!ep)
|
|
|
- goto autoconf_fail;
|
|
|
- ep->driver_data = fsg; // claim the endpoint
|
|
|
- fsg->bulk_in = ep;
|
|
|
-
|
|
|
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
|
|
|
- if (!ep)
|
|
|
- goto autoconf_fail;
|
|
|
- ep->driver_data = fsg; // claim the endpoint
|
|
|
- fsg->bulk_out = ep;
|
|
|
-
|
|
|
- if (transport_is_cbi()) {
|
|
|
- ep = usb_ep_autoconfig(gadget, &fsg_fs_intr_in_desc);
|
|
|
- if (!ep)
|
|
|
- goto autoconf_fail;
|
|
|
- ep->driver_data = fsg; // claim the endpoint
|
|
|
- fsg->intr_in = ep;
|
|
|
- }
|
|
|
-
|
|
|
- /* Fix up the descriptors */
|
|
|
- device_desc.idVendor = cpu_to_le16(mod_data.vendor);
|
|
|
- device_desc.idProduct = cpu_to_le16(mod_data.product);
|
|
|
- device_desc.bcdDevice = cpu_to_le16(mod_data.release);
|
|
|
-
|
|
|
- i = (transport_is_cbi() ? 3 : 2); // Number of endpoints
|
|
|
- fsg_intf_desc.bNumEndpoints = i;
|
|
|
- fsg_intf_desc.bInterfaceSubClass = mod_data.protocol_type;
|
|
|
- fsg_intf_desc.bInterfaceProtocol = mod_data.transport_type;
|
|
|
- fsg_fs_function[i + FSG_FS_FUNCTION_PRE_EP_ENTRIES] = NULL;
|
|
|
-
|
|
|
- if (gadget_is_dualspeed(gadget)) {
|
|
|
- fsg_hs_function[i + FSG_HS_FUNCTION_PRE_EP_ENTRIES] = NULL;
|
|
|
-
|
|
|
- /* Assume endpoint addresses are the same for both speeds */
|
|
|
- fsg_hs_bulk_in_desc.bEndpointAddress =
|
|
|
- fsg_fs_bulk_in_desc.bEndpointAddress;
|
|
|
- fsg_hs_bulk_out_desc.bEndpointAddress =
|
|
|
- fsg_fs_bulk_out_desc.bEndpointAddress;
|
|
|
- fsg_hs_intr_in_desc.bEndpointAddress =
|
|
|
- fsg_fs_intr_in_desc.bEndpointAddress;
|
|
|
- }
|
|
|
-
|
|
|
- if (gadget_is_superspeed(gadget)) {
|
|
|
- unsigned max_burst;
|
|
|
-
|
|
|
- fsg_ss_function[i + FSG_SS_FUNCTION_PRE_EP_ENTRIES] = NULL;
|
|
|
-
|
|
|
- /* Calculate bMaxBurst, we know packet size is 1024 */
|
|
|
- max_burst = min_t(unsigned, mod_data.buflen / 1024, 15);
|
|
|
-
|
|
|
- /* Assume endpoint addresses are the same for both speeds */
|
|
|
- fsg_ss_bulk_in_desc.bEndpointAddress =
|
|
|
- fsg_fs_bulk_in_desc.bEndpointAddress;
|
|
|
- fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst;
|
|
|
-
|
|
|
- fsg_ss_bulk_out_desc.bEndpointAddress =
|
|
|
- fsg_fs_bulk_out_desc.bEndpointAddress;
|
|
|
- fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst;
|
|
|
- }
|
|
|
-
|
|
|
- if (gadget_is_otg(gadget))
|
|
|
- fsg_otg_desc.bmAttributes |= USB_OTG_HNP;
|
|
|
-
|
|
|
- rc = -ENOMEM;
|
|
|
-
|
|
|
- /* Allocate the request and buffer for endpoint 0 */
|
|
|
- fsg->ep0req = req = usb_ep_alloc_request(fsg->ep0, GFP_KERNEL);
|
|
|
- if (!req)
|
|
|
- goto out;
|
|
|
- req->buf = kmalloc(EP0_BUFSIZE, GFP_KERNEL);
|
|
|
- if (!req->buf)
|
|
|
- goto out;
|
|
|
- req->complete = ep0_complete;
|
|
|
-
|
|
|
- /* Allocate the data buffers */
|
|
|
- for (i = 0; i < fsg_num_buffers; ++i) {
|
|
|
- struct fsg_buffhd *bh = &fsg->buffhds[i];
|
|
|
-
|
|
|
- /* Allocate for the bulk-in endpoint. We assume that
|
|
|
- * the buffer will also work with the bulk-out (and
|
|
|
- * interrupt-in) endpoint. */
|
|
|
- bh->buf = kmalloc(mod_data.buflen, GFP_KERNEL);
|
|
|
- if (!bh->buf)
|
|
|
- goto out;
|
|
|
- bh->next = bh + 1;
|
|
|
- }
|
|
|
- fsg->buffhds[fsg_num_buffers - 1].next = &fsg->buffhds[0];
|
|
|
-
|
|
|
- /* This should reflect the actual gadget power source */
|
|
|
- usb_gadget_set_selfpowered(gadget);
|
|
|
-
|
|
|
- snprintf(fsg_string_manufacturer, sizeof fsg_string_manufacturer,
|
|
|
- "%s %s with %s",
|
|
|
- init_utsname()->sysname, init_utsname()->release,
|
|
|
- gadget->name);
|
|
|
-
|
|
|
- fsg->thread_task = kthread_create(fsg_main_thread, fsg,
|
|
|
- "file-storage-gadget");
|
|
|
- if (IS_ERR(fsg->thread_task)) {
|
|
|
- rc = PTR_ERR(fsg->thread_task);
|
|
|
- goto out;
|
|
|
- }
|
|
|
-
|
|
|
- INFO(fsg, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
|
|
|
- INFO(fsg, "NOTE: This driver is deprecated. "
|
|
|
- "Consider using g_mass_storage instead.\n");
|
|
|
- INFO(fsg, "Number of LUNs=%d\n", fsg->nluns);
|
|
|
-
|
|
|
- pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
|
|
|
- for (i = 0; i < fsg->nluns; ++i) {
|
|
|
- curlun = &fsg->luns[i];
|
|
|
- if (fsg_lun_is_open(curlun)) {
|
|
|
- p = NULL;
|
|
|
- if (pathbuf) {
|
|
|
- p = d_path(&curlun->filp->f_path,
|
|
|
- pathbuf, PATH_MAX);
|
|
|
- if (IS_ERR(p))
|
|
|
- p = NULL;
|
|
|
- }
|
|
|
- LINFO(curlun, "ro=%d, nofua=%d, file: %s\n",
|
|
|
- curlun->ro, curlun->nofua, (p ? p : "(error)"));
|
|
|
- }
|
|
|
- }
|
|
|
- kfree(pathbuf);
|
|
|
-
|
|
|
- DBG(fsg, "transport=%s (x%02x)\n",
|
|
|
- mod_data.transport_name, mod_data.transport_type);
|
|
|
- DBG(fsg, "protocol=%s (x%02x)\n",
|
|
|
- mod_data.protocol_name, mod_data.protocol_type);
|
|
|
- DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n",
|
|
|
- mod_data.vendor, mod_data.product, mod_data.release);
|
|
|
- DBG(fsg, "removable=%d, stall=%d, cdrom=%d, buflen=%u\n",
|
|
|
- mod_data.removable, mod_data.can_stall,
|
|
|
- mod_data.cdrom, mod_data.buflen);
|
|
|
- DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task));
|
|
|
-
|
|
|
- set_bit(REGISTERED, &fsg->atomic_bitflags);
|
|
|
-
|
|
|
- /* Tell the thread to start working */
|
|
|
- wake_up_process(fsg->thread_task);
|
|
|
- return 0;
|
|
|
-
|
|
|
-autoconf_fail:
|
|
|
- ERROR(fsg, "unable to autoconfigure all endpoints\n");
|
|
|
- rc = -ENOTSUPP;
|
|
|
-
|
|
|
-out:
|
|
|
- fsg->state = FSG_STATE_TERMINATED; // The thread is dead
|
|
|
- fsg_unbind(gadget);
|
|
|
- complete(&fsg->thread_notifier);
|
|
|
- return rc;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static void fsg_suspend(struct usb_gadget *gadget)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = get_gadget_data(gadget);
|
|
|
-
|
|
|
- DBG(fsg, "suspend\n");
|
|
|
- set_bit(SUSPENDED, &fsg->atomic_bitflags);
|
|
|
-}
|
|
|
-
|
|
|
-static void fsg_resume(struct usb_gadget *gadget)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = get_gadget_data(gadget);
|
|
|
-
|
|
|
- DBG(fsg, "resume\n");
|
|
|
- clear_bit(SUSPENDED, &fsg->atomic_bitflags);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-/*-------------------------------------------------------------------------*/
|
|
|
-
|
|
|
-static __refdata struct usb_gadget_driver fsg_driver = {
|
|
|
- .max_speed = USB_SPEED_SUPER,
|
|
|
- .function = (char *) fsg_string_product,
|
|
|
- .bind = fsg_bind,
|
|
|
- .unbind = fsg_unbind,
|
|
|
- .disconnect = fsg_disconnect,
|
|
|
- .setup = fsg_setup,
|
|
|
- .suspend = fsg_suspend,
|
|
|
- .resume = fsg_resume,
|
|
|
-
|
|
|
- .driver = {
|
|
|
- .name = DRIVER_NAME,
|
|
|
- .owner = THIS_MODULE,
|
|
|
- // .release = ...
|
|
|
- // .suspend = ...
|
|
|
- // .resume = ...
|
|
|
- },
|
|
|
-};
|
|
|
-
|
|
|
-
|
|
|
-static int __init fsg_alloc(void)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg;
|
|
|
-
|
|
|
- fsg = kzalloc(sizeof *fsg +
|
|
|
- fsg_num_buffers * sizeof *(fsg->buffhds), GFP_KERNEL);
|
|
|
-
|
|
|
- if (!fsg)
|
|
|
- return -ENOMEM;
|
|
|
- spin_lock_init(&fsg->lock);
|
|
|
- init_rwsem(&fsg->filesem);
|
|
|
- kref_init(&fsg->ref);
|
|
|
- init_completion(&fsg->thread_notifier);
|
|
|
-
|
|
|
- the_fsg = fsg;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int __init fsg_init(void)
|
|
|
-{
|
|
|
- int rc;
|
|
|
- struct fsg_dev *fsg;
|
|
|
-
|
|
|
- rc = fsg_num_buffers_validate();
|
|
|
- if (rc != 0)
|
|
|
- return rc;
|
|
|
-
|
|
|
- if ((rc = fsg_alloc()) != 0)
|
|
|
- return rc;
|
|
|
- fsg = the_fsg;
|
|
|
- rc = usb_gadget_probe_driver(&fsg_driver);
|
|
|
- if (rc != 0)
|
|
|
- kref_put(&fsg->ref, fsg_release);
|
|
|
- return rc;
|
|
|
-}
|
|
|
-module_init(fsg_init);
|
|
|
-
|
|
|
-
|
|
|
-static void __exit fsg_cleanup(void)
|
|
|
-{
|
|
|
- struct fsg_dev *fsg = the_fsg;
|
|
|
-
|
|
|
- /* Unregister the driver iff the thread hasn't already done so */
|
|
|
- if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags))
|
|
|
- usb_gadget_unregister_driver(&fsg_driver);
|
|
|
-
|
|
|
- /* Wait for the thread to finish up */
|
|
|
- wait_for_completion(&fsg->thread_notifier);
|
|
|
-
|
|
|
- kref_put(&fsg->ref, fsg_release);
|
|
|
-}
|
|
|
-module_exit(fsg_cleanup);
|
Greg Kroah-Hartman