Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * file_storage.c -- File-backed USB Storage Gadget, for USB development |
| 3 | * |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 4 | * Copyright (C) 2003-2008 Alan Stern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions, and the following disclaimer, |
| 12 | * without modification. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The names of the above-listed copyright holders may not be used |
| 17 | * to endorse or promote products derived from this software without |
| 18 | * specific prior written permission. |
| 19 | * |
| 20 | * ALTERNATIVELY, this software may be distributed under the terms of the |
| 21 | * GNU General Public License ("GPL") as published by the Free Software |
| 22 | * Foundation, either version 2 of that License or (at your option) any |
| 23 | * later version. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 26 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 27 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 29 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 30 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 31 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 32 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | |
| 39 | /* |
| 40 | * The File-backed Storage Gadget acts as a USB Mass Storage device, |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 41 | * appearing to the host as a disk drive or as a CD-ROM drive. In addition |
| 42 | * to providing an example of a genuinely useful gadget driver for a USB |
| 43 | * device, it also illustrates a technique of double-buffering for increased |
| 44 | * throughput. Last but not least, it gives an easy way to probe the |
| 45 | * behavior of the Mass Storage drivers in a USB host. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | * |
| 47 | * Backing storage is provided by a regular file or a block device, specified |
| 48 | * by the "file" module parameter. Access can be limited to read-only by |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 49 | * setting the optional "ro" module parameter. (For CD-ROM emulation, |
| 50 | * access is always read-only.) The gadget will indicate that it has |
| 51 | * removable media if the optional "removable" module parameter is set. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | * |
| 53 | * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI), |
| 54 | * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected |
| 55 | * by the optional "transport" module parameter. It also supports the |
| 56 | * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03), |
| 57 | * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by |
| 58 | * the optional "protocol" module parameter. In addition, the default |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 59 | * Vendor ID, Product ID, release number and serial number can be overridden. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | * |
| 61 | * There is support for multiple logical units (LUNs), each of which has |
| 62 | * its own backing file. The number of LUNs can be set using the optional |
| 63 | * "luns" module parameter (anywhere from 1 to 8), and the corresponding |
| 64 | * files are specified using comma-separated lists for "file" and "ro". |
| 65 | * The default number of LUNs is taken from the number of "file" elements; |
| 66 | * it is 1 if "file" is not given. If "removable" is not set then a backing |
| 67 | * file must be specified for each LUN. If it is set, then an unspecified |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 68 | * or empty backing filename means the LUN's medium is not loaded. Ideally |
| 69 | * each LUN would be settable independently as a disk drive or a CD-ROM |
| 70 | * drive, but currently all LUNs have to be the same type. The CD-ROM |
| 71 | * emulation includes a single data track and no audio tracks; hence there |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 72 | * need be only one backing file per LUN. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | * |
| 74 | * Requirements are modest; only a bulk-in and a bulk-out endpoint are |
| 75 | * needed (an interrupt-out endpoint is also needed for CBI). The memory |
| 76 | * requirement amounts to two 16K buffers, size configurable by a parameter. |
| 77 | * Support is included for both full-speed and high-speed operation. |
| 78 | * |
Alan Stern | 14cd5f8 | 2006-03-23 15:07:25 -0500 | [diff] [blame] | 79 | * Note that the driver is slightly non-portable in that it assumes a |
| 80 | * single memory/DMA buffer will be useable for bulk-in, bulk-out, and |
| 81 | * interrupt-in endpoints. With most device controllers this isn't an |
| 82 | * issue, but there may be some with hardware restrictions that prevent |
| 83 | * a buffer from being used by more than one endpoint. |
| 84 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | * Module options: |
| 86 | * |
| 87 | * file=filename[,filename...] |
| 88 | * Required if "removable" is not set, names of |
| 89 | * the files or block devices used for |
| 90 | * backing storage |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 91 | * serial=HHHH... Required serial number (string of hex chars) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | * ro=b[,b...] Default false, booleans for read-only access |
| 93 | * removable Default false, boolean for removable media |
| 94 | * luns=N Default N = number of filenames, number of |
| 95 | * LUNs to support |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 96 | * nofua=b[,b...] Default false, booleans for ignore FUA flag |
| 97 | * in SCSI WRITE(10,12) commands |
Alan Stern | d794ac7 | 2005-04-18 12:43:25 -0400 | [diff] [blame] | 98 | * stall Default determined according to the type of |
| 99 | * USB device controller (usually true), |
| 100 | * boolean to permit the driver to halt |
| 101 | * bulk endpoints |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 102 | * cdrom Default false, boolean for whether to emulate |
| 103 | * a CD-ROM drive |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | * transport=XXX Default BBB, transport name (CB, CBI, or BBB) |
| 105 | * protocol=YYY Default SCSI, protocol name (RBC, 8020 or |
| 106 | * ATAPI, QIC, UFI, 8070, or SCSI; |
| 107 | * also 1 - 6) |
| 108 | * vendor=0xVVVV Default 0x0525 (NetChip), USB Vendor ID |
| 109 | * product=0xPPPP Default 0xa4a5 (FSG), USB Product ID |
| 110 | * release=0xRRRR Override the USB release number (bcdDevice) |
| 111 | * buflen=N Default N=16384, buffer size used (will be |
| 112 | * rounded down to a multiple of |
| 113 | * PAGE_CACHE_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | * |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 115 | * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "serial", "ro", |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 116 | * "removable", "luns", "nofua", "stall", and "cdrom" options are available; |
| 117 | * default values are used for everything else. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | * |
| 119 | * The pathnames of the backing files and the ro settings are available in |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 120 | * the attribute files "file", "nofua", and "ro" in the lun<n> subdirectory of |
| 121 | * the gadget's sysfs directory. If the "removable" option is set, writing to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | * these files will simulate ejecting/loading the medium (writing an empty |
| 123 | * line means eject) and adjusting a write-enable tab. Changes to the ro |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 124 | * setting are not allowed when the medium is loaded or if CD-ROM emulation |
| 125 | * is being used. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | * |
| 127 | * This gadget driver is heavily based on "Gadget Zero" by David Brownell. |
Alan Stern | aafe5bd | 2006-03-31 11:46:43 -0500 | [diff] [blame] | 128 | * The driver's SCSI command interface was based on the "Information |
| 129 | * technology - Small Computer System Interface - 2" document from |
| 130 | * X3T9.2 Project 375D, Revision 10L, 7-SEP-93, available at |
| 131 | * <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>. The single exception |
| 132 | * is opcode 0x23 (READ FORMAT CAPACITIES), which was based on the |
| 133 | * "Universal Serial Bus Mass Storage Class UFI Command Specification" |
| 134 | * document, Revision 1.0, December 14, 1998, available at |
| 135 | * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | */ |
| 137 | |
| 138 | |
| 139 | /* |
| 140 | * Driver Design |
| 141 | * |
| 142 | * The FSG driver is fairly straightforward. There is a main kernel |
| 143 | * thread that handles most of the work. Interrupt routines field |
| 144 | * callbacks from the controller driver: bulk- and interrupt-request |
| 145 | * completion notifications, endpoint-0 events, and disconnect events. |
| 146 | * Completion events are passed to the main thread by wakeup calls. Many |
| 147 | * ep0 requests are handled at interrupt time, but SetInterface, |
| 148 | * SetConfiguration, and device reset requests are forwarded to the |
| 149 | * thread in the form of "exceptions" using SIGUSR1 signals (since they |
| 150 | * should interrupt any ongoing file I/O operations). |
| 151 | * |
| 152 | * The thread's main routine implements the standard command/data/status |
| 153 | * parts of a SCSI interaction. It and its subroutines are full of tests |
| 154 | * for pending signals/exceptions -- all this polling is necessary since |
| 155 | * the kernel has no setjmp/longjmp equivalents. (Maybe this is an |
| 156 | * indication that the driver really wants to be running in userspace.) |
| 157 | * An important point is that so long as the thread is alive it keeps an |
| 158 | * open reference to the backing file. This will prevent unmounting |
| 159 | * the backing file's underlying filesystem and could cause problems |
| 160 | * during system shutdown, for example. To prevent such problems, the |
| 161 | * thread catches INT, TERM, and KILL signals and converts them into |
| 162 | * an EXIT exception. |
| 163 | * |
| 164 | * In normal operation the main thread is started during the gadget's |
| 165 | * fsg_bind() callback and stopped during fsg_unbind(). But it can also |
| 166 | * exit when it receives a signal, and there's no point leaving the |
| 167 | * gadget running when the thread is dead. So just before the thread |
| 168 | * exits, it deregisters the gadget driver. This makes things a little |
| 169 | * tricky: The driver is deregistered at two places, and the exiting |
| 170 | * thread can indirectly call fsg_unbind() which in turn can tell the |
| 171 | * thread to exit. The first problem is resolved through the use of the |
| 172 | * REGISTERED atomic bitflag; the driver will only be deregistered once. |
| 173 | * The second problem is resolved by having fsg_unbind() check |
| 174 | * fsg->state; it won't try to stop the thread if the state is already |
| 175 | * FSG_STATE_TERMINATED. |
| 176 | * |
| 177 | * To provide maximum throughput, the driver uses a circular pipeline of |
| 178 | * buffer heads (struct fsg_buffhd). In principle the pipeline can be |
| 179 | * arbitrarily long; in practice the benefits don't justify having more |
| 180 | * than 2 stages (i.e., double buffering). But it helps to think of the |
| 181 | * pipeline as being a long one. Each buffer head contains a bulk-in and |
| 182 | * a bulk-out request pointer (since the buffer can be used for both |
| 183 | * output and input -- directions always are given from the host's |
| 184 | * point of view) as well as a pointer to the buffer and various state |
| 185 | * variables. |
| 186 | * |
| 187 | * Use of the pipeline follows a simple protocol. There is a variable |
| 188 | * (fsg->next_buffhd_to_fill) that points to the next buffer head to use. |
| 189 | * At any time that buffer head may still be in use from an earlier |
| 190 | * request, so each buffer head has a state variable indicating whether |
| 191 | * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the |
| 192 | * buffer head to be EMPTY, filling the buffer either by file I/O or by |
| 193 | * USB I/O (during which the buffer head is BUSY), and marking the buffer |
| 194 | * head FULL when the I/O is complete. Then the buffer will be emptied |
| 195 | * (again possibly by USB I/O, during which it is marked BUSY) and |
| 196 | * finally marked EMPTY again (possibly by a completion routine). |
| 197 | * |
| 198 | * A module parameter tells the driver to avoid stalling the bulk |
| 199 | * endpoints wherever the transport specification allows. This is |
| 200 | * necessary for some UDCs like the SuperH, which cannot reliably clear a |
| 201 | * halt on a bulk endpoint. However, under certain circumstances the |
| 202 | * Bulk-only specification requires a stall. In such cases the driver |
| 203 | * will halt the endpoint and set a flag indicating that it should clear |
| 204 | * the halt in software during the next device reset. Hopefully this |
| 205 | * will permit everything to work correctly. Furthermore, although the |
| 206 | * specification allows the bulk-out endpoint to halt when the host sends |
| 207 | * too much data, implementing this would cause an unavoidable race. |
| 208 | * The driver will always use the "no-stall" approach for OUT transfers. |
| 209 | * |
| 210 | * One subtle point concerns sending status-stage responses for ep0 |
| 211 | * requests. Some of these requests, such as device reset, can involve |
| 212 | * interrupting an ongoing file I/O operation, which might take an |
| 213 | * arbitrarily long time. During that delay the host might give up on |
| 214 | * the original ep0 request and issue a new one. When that happens the |
| 215 | * driver should not notify the host about completion of the original |
| 216 | * request, as the host will no longer be waiting for it. So the driver |
| 217 | * assigns to each ep0 request a unique tag, and it keeps track of the |
| 218 | * tag value of the request associated with a long-running exception |
| 219 | * (device-reset, interface-change, or configuration-change). When the |
| 220 | * exception handler is finished, the status-stage response is submitted |
| 221 | * only if the current ep0 request tag is equal to the exception request |
| 222 | * tag. Thus only the most recently received ep0 request will get a |
| 223 | * status-stage response. |
| 224 | * |
| 225 | * Warning: This driver source file is too long. It ought to be split up |
| 226 | * into a header file plus about 3 separate .c files, to handle the details |
| 227 | * of the Gadget, USB Mass Storage, and SCSI protocols. |
| 228 | */ |
| 229 | |
| 230 | |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 231 | /* #define VERBOSE_DEBUG */ |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 232 | /* #define DUMP_MSGS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | #include <linux/blkdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | #include <linux/completion.h> |
| 237 | #include <linux/dcache.h> |
| 238 | #include <linux/delay.h> |
| 239 | #include <linux/device.h> |
| 240 | #include <linux/fcntl.h> |
| 241 | #include <linux/file.h> |
| 242 | #include <linux/fs.h> |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 243 | #include <linux/kref.h> |
Alan Stern | 22efcf4 | 2005-09-26 16:12:02 -0400 | [diff] [blame] | 244 | #include <linux/kthread.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | #include <linux/limits.h> |
Paul Gortmaker | 6eb0de8 | 2011-07-03 16:09:31 -0400 | [diff] [blame] | 246 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | #include <linux/rwsem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | #include <linux/slab.h> |
| 249 | #include <linux/spinlock.h> |
| 250 | #include <linux/string.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 251 | #include <linux/freezer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | #include <linux/utsname.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
David Brownell | 5f84813 | 2006-12-16 15:34:53 -0800 | [diff] [blame] | 254 | #include <linux/usb/ch9.h> |
David Brownell | 9454a57 | 2007-10-04 18:05:17 -0700 | [diff] [blame] | 255 | #include <linux/usb/gadget.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
| 257 | #include "gadget_chips.h" |
| 258 | |
| 259 | |
David Brownell | 352e2b9 | 2008-08-18 17:43:25 -0700 | [diff] [blame] | 260 | |
| 261 | /* |
| 262 | * Kbuild is not very cooperative with respect to linking separately |
| 263 | * compiled library objects into one module. So for now we won't use |
| 264 | * separate compilation ... ensuring init/exit sections work to shrink |
| 265 | * the runtime footprint, and giving us at least some parts of what |
| 266 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. |
| 267 | */ |
| 268 | #include "usbstring.c" |
| 269 | #include "config.c" |
| 270 | #include "epautoconf.c" |
| 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | /*-------------------------------------------------------------------------*/ |
| 273 | |
| 274 | #define DRIVER_DESC "File-backed Storage Gadget" |
| 275 | #define DRIVER_NAME "g_file_storage" |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 276 | #define DRIVER_VERSION "1 September 2010" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 278 | static char fsg_string_manufacturer[64]; |
| 279 | static const char fsg_string_product[] = DRIVER_DESC; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 280 | static const char fsg_string_config[] = "Self-powered"; |
| 281 | static const char fsg_string_interface[] = "Mass Storage"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 283 | |
| 284 | #include "storage_common.c" |
| 285 | |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 288 | MODULE_AUTHOR("Alan Stern"); |
| 289 | MODULE_LICENSE("Dual BSD/GPL"); |
| 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | /* |
| 292 | * This driver assumes self-powered hardware and has no way for users to |
| 293 | * trigger remote wakeup. It uses autoconfiguration to select endpoints |
| 294 | * and endpoint addresses. |
| 295 | */ |
| 296 | |
| 297 | |
| 298 | /*-------------------------------------------------------------------------*/ |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | /* Encapsulate the module parameter settings */ |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | static struct { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 304 | char *file[FSG_MAX_LUNS]; |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 305 | char *serial; |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 306 | bool ro[FSG_MAX_LUNS]; |
| 307 | bool nofua[FSG_MAX_LUNS]; |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 308 | unsigned int num_filenames; |
| 309 | unsigned int num_ros; |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 310 | unsigned int num_nofuas; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | unsigned int nluns; |
| 312 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 313 | bool removable; |
| 314 | bool can_stall; |
| 315 | bool cdrom; |
Alan Stern | d794ac7 | 2005-04-18 12:43:25 -0400 | [diff] [blame] | 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | char *transport_parm; |
| 318 | char *protocol_parm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | unsigned short vendor; |
| 320 | unsigned short product; |
| 321 | unsigned short release; |
| 322 | unsigned int buflen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | int transport_type; |
| 325 | char *transport_name; |
| 326 | int protocol_type; |
| 327 | char *protocol_name; |
| 328 | |
| 329 | } mod_data = { // Default values |
| 330 | .transport_parm = "BBB", |
| 331 | .protocol_parm = "SCSI", |
| 332 | .removable = 0, |
Alan Stern | d794ac7 | 2005-04-18 12:43:25 -0400 | [diff] [blame] | 333 | .can_stall = 1, |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 334 | .cdrom = 0, |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 335 | .vendor = FSG_VENDOR_ID, |
| 336 | .product = FSG_PRODUCT_ID, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | .release = 0xffff, // Use controller chip type |
| 338 | .buflen = 16384, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | }; |
| 340 | |
| 341 | |
Alan Stern | aafe5bd | 2006-03-31 11:46:43 -0500 | [diff] [blame] | 342 | module_param_array_named(file, mod_data.file, charp, &mod_data.num_filenames, |
| 343 | S_IRUGO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | MODULE_PARM_DESC(file, "names of backing files or devices"); |
| 345 | |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 346 | module_param_named(serial, mod_data.serial, charp, S_IRUGO); |
| 347 | MODULE_PARM_DESC(serial, "USB serial number"); |
| 348 | |
Alan Stern | aafe5bd | 2006-03-31 11:46:43 -0500 | [diff] [blame] | 349 | module_param_array_named(ro, mod_data.ro, bool, &mod_data.num_ros, S_IRUGO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | MODULE_PARM_DESC(ro, "true to force read-only"); |
| 351 | |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 352 | module_param_array_named(nofua, mod_data.nofua, bool, &mod_data.num_nofuas, |
| 353 | S_IRUGO); |
| 354 | MODULE_PARM_DESC(nofua, "true to ignore SCSI WRITE(10,12) FUA bit"); |
| 355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | module_param_named(luns, mod_data.nluns, uint, S_IRUGO); |
| 357 | MODULE_PARM_DESC(luns, "number of LUNs"); |
| 358 | |
| 359 | module_param_named(removable, mod_data.removable, bool, S_IRUGO); |
| 360 | MODULE_PARM_DESC(removable, "true to simulate removable media"); |
| 361 | |
Alan Stern | d794ac7 | 2005-04-18 12:43:25 -0400 | [diff] [blame] | 362 | module_param_named(stall, mod_data.can_stall, bool, S_IRUGO); |
| 363 | MODULE_PARM_DESC(stall, "false to prevent bulk stalls"); |
| 364 | |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 365 | module_param_named(cdrom, mod_data.cdrom, bool, S_IRUGO); |
| 366 | MODULE_PARM_DESC(cdrom, "true to emulate cdrom instead of disk"); |
| 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | /* In the non-TEST version, only the module parameters listed above |
| 369 | * are available. */ |
| 370 | #ifdef CONFIG_USB_FILE_STORAGE_TEST |
| 371 | |
| 372 | module_param_named(transport, mod_data.transport_parm, charp, S_IRUGO); |
| 373 | MODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)"); |
| 374 | |
| 375 | module_param_named(protocol, mod_data.protocol_parm, charp, S_IRUGO); |
| 376 | MODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, " |
| 377 | "8070, or SCSI)"); |
| 378 | |
| 379 | module_param_named(vendor, mod_data.vendor, ushort, S_IRUGO); |
| 380 | MODULE_PARM_DESC(vendor, "USB Vendor ID"); |
| 381 | |
| 382 | module_param_named(product, mod_data.product, ushort, S_IRUGO); |
| 383 | MODULE_PARM_DESC(product, "USB Product ID"); |
| 384 | |
| 385 | module_param_named(release, mod_data.release, ushort, S_IRUGO); |
| 386 | MODULE_PARM_DESC(release, "USB release number"); |
| 387 | |
| 388 | module_param_named(buflen, mod_data.buflen, uint, S_IRUGO); |
| 389 | MODULE_PARM_DESC(buflen, "I/O buffer size"); |
| 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | #endif /* CONFIG_USB_FILE_STORAGE_TEST */ |
| 392 | |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | /* |
| 395 | * These definitions will permit the compiler to avoid generating code for |
| 396 | * parts of the driver that aren't used in the non-TEST version. Even gcc |
| 397 | * can recognize when a test of a constant expression yields a dead code |
| 398 | * path. |
| 399 | */ |
| 400 | |
| 401 | #ifdef CONFIG_USB_FILE_STORAGE_TEST |
| 402 | |
| 403 | #define transport_is_bbb() (mod_data.transport_type == USB_PR_BULK) |
| 404 | #define transport_is_cbi() (mod_data.transport_type == USB_PR_CBI) |
| 405 | #define protocol_is_scsi() (mod_data.protocol_type == USB_SC_SCSI) |
| 406 | |
| 407 | #else |
| 408 | |
| 409 | #define transport_is_bbb() 1 |
| 410 | #define transport_is_cbi() 0 |
| 411 | #define protocol_is_scsi() 1 |
| 412 | |
| 413 | #endif /* CONFIG_USB_FILE_STORAGE_TEST */ |
| 414 | |
| 415 | |
Michal Nazarewicz | b6058d0 | 2009-10-28 16:57:14 +0100 | [diff] [blame] | 416 | /*-------------------------------------------------------------------------*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | struct fsg_dev { |
| 420 | /* lock protects: state, all the req_busy's, and cbbuf_cmnd */ |
| 421 | spinlock_t lock; |
| 422 | struct usb_gadget *gadget; |
| 423 | |
| 424 | /* filesem protects: backing files in use */ |
| 425 | struct rw_semaphore filesem; |
| 426 | |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 427 | /* reference counting: wait until all LUNs are released */ |
| 428 | struct kref ref; |
| 429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | struct usb_ep *ep0; // Handy copy of gadget->ep0 |
| 431 | struct usb_request *ep0req; // For control responses |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 432 | unsigned int ep0_req_tag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | const char *ep0req_name; |
| 434 | |
| 435 | struct usb_request *intreq; // For interrupt responses |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 436 | int intreq_busy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | struct fsg_buffhd *intr_buffhd; |
| 438 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 439 | unsigned int bulk_out_maxpacket; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | enum fsg_state state; // For exception handling |
| 441 | unsigned int exception_req_tag; |
| 442 | |
| 443 | u8 config, new_config; |
| 444 | |
| 445 | unsigned int running : 1; |
| 446 | unsigned int bulk_in_enabled : 1; |
| 447 | unsigned int bulk_out_enabled : 1; |
| 448 | unsigned int intr_in_enabled : 1; |
| 449 | unsigned int phase_error : 1; |
| 450 | unsigned int short_packet_received : 1; |
| 451 | unsigned int bad_lun_okay : 1; |
| 452 | |
| 453 | unsigned long atomic_bitflags; |
| 454 | #define REGISTERED 0 |
Alan Stern | b950bdb | 2008-04-14 11:45:29 -0400 | [diff] [blame] | 455 | #define IGNORE_BULK_OUT 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | #define SUSPENDED 2 |
| 457 | |
| 458 | struct usb_ep *bulk_in; |
| 459 | struct usb_ep *bulk_out; |
| 460 | struct usb_ep *intr_in; |
| 461 | |
| 462 | struct fsg_buffhd *next_buffhd_to_fill; |
| 463 | struct fsg_buffhd *next_buffhd_to_drain; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | int thread_wakeup_needed; |
| 466 | struct completion thread_notifier; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | struct task_struct *thread_task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | int cmnd_size; |
| 470 | u8 cmnd[MAX_COMMAND_SIZE]; |
| 471 | enum data_direction data_dir; |
| 472 | u32 data_size; |
| 473 | u32 data_size_from_cmnd; |
| 474 | u32 tag; |
| 475 | unsigned int lun; |
| 476 | u32 residue; |
| 477 | u32 usb_amount_left; |
| 478 | |
| 479 | /* The CB protocol offers no way for a host to know when a command |
| 480 | * has completed. As a result the next command may arrive early, |
| 481 | * and we will still have to handle it. For that reason we need |
| 482 | * a buffer to store new commands when using CB (or CBI, which |
| 483 | * does not oblige a host to wait for command completion either). */ |
| 484 | int cbbuf_cmnd_size; |
| 485 | u8 cbbuf_cmnd[MAX_COMMAND_SIZE]; |
| 486 | |
| 487 | unsigned int nluns; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 488 | struct fsg_lun *luns; |
| 489 | struct fsg_lun *curlun; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 490 | /* Must be the last entry */ |
| 491 | struct fsg_buffhd buffhds[]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | }; |
| 493 | |
| 494 | typedef void (*fsg_routine_t)(struct fsg_dev *); |
| 495 | |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 496 | static int exception_in_progress(struct fsg_dev *fsg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
| 498 | return (fsg->state > FSG_STATE_IDLE); |
| 499 | } |
| 500 | |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 501 | /* Make bulk-out requests be divisible by the maxpacket size */ |
| 502 | static void set_bulk_out_req_length(struct fsg_dev *fsg, |
| 503 | struct fsg_buffhd *bh, unsigned int length) |
| 504 | { |
| 505 | unsigned int rem; |
| 506 | |
| 507 | bh->bulk_out_intended_length = length; |
| 508 | rem = length % fsg->bulk_out_maxpacket; |
| 509 | if (rem > 0) |
| 510 | length += fsg->bulk_out_maxpacket - rem; |
| 511 | bh->outreq->length = length; |
| 512 | } |
| 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | static struct fsg_dev *the_fsg; |
| 515 | static struct usb_gadget_driver fsg_driver; |
| 516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | /*-------------------------------------------------------------------------*/ |
| 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep) |
| 521 | { |
| 522 | const char *name; |
| 523 | |
| 524 | if (ep == fsg->bulk_in) |
| 525 | name = "bulk-in"; |
| 526 | else if (ep == fsg->bulk_out) |
| 527 | name = "bulk-out"; |
| 528 | else |
| 529 | name = ep->name; |
| 530 | DBG(fsg, "%s set halt\n", name); |
| 531 | return usb_ep_set_halt(ep); |
| 532 | } |
| 533 | |
| 534 | |
| 535 | /*-------------------------------------------------------------------------*/ |
| 536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | /* |
| 538 | * DESCRIPTORS ... most are static, but strings and (full) configuration |
| 539 | * descriptors are built on demand. Also the (static) config and interface |
| 540 | * descriptors are adjusted during fsg_bind(). |
| 541 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* There is only one configuration. */ |
| 544 | #define CONFIG_VALUE 1 |
| 545 | |
| 546 | static struct usb_device_descriptor |
| 547 | device_desc = { |
| 548 | .bLength = sizeof device_desc, |
| 549 | .bDescriptorType = USB_DT_DEVICE, |
| 550 | |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 551 | .bcdUSB = cpu_to_le16(0x0200), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
| 553 | |
| 554 | /* The next three values can be overridden by module parameters */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 555 | .idVendor = cpu_to_le16(FSG_VENDOR_ID), |
| 556 | .idProduct = cpu_to_le16(FSG_PRODUCT_ID), |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 557 | .bcdDevice = cpu_to_le16(0xffff), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 559 | .iManufacturer = FSG_STRING_MANUFACTURER, |
| 560 | .iProduct = FSG_STRING_PRODUCT, |
| 561 | .iSerialNumber = FSG_STRING_SERIAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | .bNumConfigurations = 1, |
| 563 | }; |
| 564 | |
| 565 | static struct usb_config_descriptor |
| 566 | config_desc = { |
| 567 | .bLength = sizeof config_desc, |
| 568 | .bDescriptorType = USB_DT_CONFIG, |
| 569 | |
| 570 | /* wTotalLength computed by usb_gadget_config_buf() */ |
| 571 | .bNumInterfaces = 1, |
| 572 | .bConfigurationValue = CONFIG_VALUE, |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 573 | .iConfiguration = FSG_STRING_CONFIG, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, |
David Brownell | 36e893d | 2008-09-12 09:39:06 -0700 | [diff] [blame] | 575 | .bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | }; |
| 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | static struct usb_qualifier_descriptor |
| 580 | dev_qualifier = { |
| 581 | .bLength = sizeof dev_qualifier, |
| 582 | .bDescriptorType = USB_DT_DEVICE_QUALIFIER, |
| 583 | |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 584 | .bcdUSB = cpu_to_le16(0x0200), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
| 586 | |
| 587 | .bNumConfigurations = 1, |
| 588 | }; |
| 589 | |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 590 | static int populate_bos(struct fsg_dev *fsg, u8 *buf) |
| 591 | { |
| 592 | memcpy(buf, &fsg_bos_desc, USB_DT_BOS_SIZE); |
| 593 | buf += USB_DT_BOS_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 595 | memcpy(buf, &fsg_ext_cap_desc, USB_DT_USB_EXT_CAP_SIZE); |
| 596 | buf += USB_DT_USB_EXT_CAP_SIZE; |
| 597 | |
| 598 | memcpy(buf, &fsg_ss_cap_desc, USB_DT_USB_SS_CAP_SIZE); |
| 599 | |
| 600 | return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE |
| 601 | + USB_DT_USB_EXT_CAP_SIZE; |
| 602 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | /* |
| 605 | * Config descriptors must agree with the code that sets configurations |
| 606 | * and with code managing interfaces and their altsettings. They must |
| 607 | * also handle different speeds and other-speed requests. |
| 608 | */ |
| 609 | static int populate_config_buf(struct usb_gadget *gadget, |
| 610 | u8 *buf, u8 type, unsigned index) |
| 611 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | enum usb_device_speed speed = gadget->speed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | int len; |
| 614 | const struct usb_descriptor_header **function; |
| 615 | |
| 616 | if (index > 0) |
| 617 | return -EINVAL; |
| 618 | |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 619 | if (gadget_is_dualspeed(gadget) && type == USB_DT_OTHER_SPEED_CONFIG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed; |
Michal Nazarewicz | d23b0f0 | 2009-11-09 14:15:20 +0100 | [diff] [blame] | 621 | function = gadget_is_dualspeed(gadget) && speed == USB_SPEED_HIGH |
| 622 | ? (const struct usb_descriptor_header **)fsg_hs_function |
| 623 | : (const struct usb_descriptor_header **)fsg_fs_function; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
| 625 | /* for now, don't advertise srp-only devices */ |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 626 | if (!gadget_is_otg(gadget)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | function++; |
| 628 | |
| 629 | len = usb_gadget_config_buf(&config_desc, buf, EP0_BUFSIZE, function); |
| 630 | ((struct usb_config_descriptor *) buf)->bDescriptorType = type; |
| 631 | return len; |
| 632 | } |
| 633 | |
| 634 | |
| 635 | /*-------------------------------------------------------------------------*/ |
| 636 | |
| 637 | /* These routines may be called in process context or in_irq */ |
| 638 | |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 639 | /* Caller must hold fsg->lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | static void wakeup_thread(struct fsg_dev *fsg) |
| 641 | { |
| 642 | /* Tell the main thread that something has happened */ |
| 643 | fsg->thread_wakeup_needed = 1; |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 644 | if (fsg->thread_task) |
| 645 | wake_up_process(fsg->thread_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | |
| 649 | static void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state) |
| 650 | { |
| 651 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | |
| 653 | /* Do nothing if a higher-priority exception is already in progress. |
| 654 | * If a lower-or-equal priority exception is in progress, preempt it |
| 655 | * and notify the main thread by sending it a signal. */ |
| 656 | spin_lock_irqsave(&fsg->lock, flags); |
| 657 | if (fsg->state <= new_state) { |
| 658 | fsg->exception_req_tag = fsg->ep0_req_tag; |
| 659 | fsg->state = new_state; |
Alan Stern | 22efcf4 | 2005-09-26 16:12:02 -0400 | [diff] [blame] | 660 | if (fsg->thread_task) |
| 661 | send_sig_info(SIGUSR1, SEND_SIG_FORCED, |
| 662 | fsg->thread_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | } |
| 664 | spin_unlock_irqrestore(&fsg->lock, flags); |
| 665 | } |
| 666 | |
| 667 | |
| 668 | /*-------------------------------------------------------------------------*/ |
| 669 | |
| 670 | /* The disconnect callback and ep0 routines. These always run in_irq, |
| 671 | * except that ep0_queue() is called in the main thread to acknowledge |
| 672 | * completion of various requests: set config, set interface, and |
| 673 | * Bulk-only device reset. */ |
| 674 | |
| 675 | static void fsg_disconnect(struct usb_gadget *gadget) |
| 676 | { |
| 677 | struct fsg_dev *fsg = get_gadget_data(gadget); |
| 678 | |
| 679 | DBG(fsg, "disconnect or port reset\n"); |
| 680 | raise_exception(fsg, FSG_STATE_DISCONNECT); |
| 681 | } |
| 682 | |
| 683 | |
| 684 | static int ep0_queue(struct fsg_dev *fsg) |
| 685 | { |
| 686 | int rc; |
| 687 | |
| 688 | rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC); |
| 689 | if (rc != 0 && rc != -ESHUTDOWN) { |
| 690 | |
| 691 | /* We can't do much more than wait for a reset */ |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 692 | WARNING(fsg, "error in submission: %s --> %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | fsg->ep0->name, rc); |
| 694 | } |
| 695 | return rc; |
| 696 | } |
| 697 | |
| 698 | static void ep0_complete(struct usb_ep *ep, struct usb_request *req) |
| 699 | { |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 700 | struct fsg_dev *fsg = ep->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
| 702 | if (req->actual > 0) |
| 703 | dump_msg(fsg, fsg->ep0req_name, req->buf, req->actual); |
| 704 | if (req->status || req->actual != req->length) |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 705 | DBG(fsg, "%s --> %d, %u/%u\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | req->status, req->actual, req->length); |
| 707 | if (req->status == -ECONNRESET) // Request was cancelled |
| 708 | usb_ep_fifo_flush(ep); |
| 709 | |
| 710 | if (req->status == 0 && req->context) |
| 711 | ((fsg_routine_t) (req->context))(fsg); |
| 712 | } |
| 713 | |
| 714 | |
| 715 | /*-------------------------------------------------------------------------*/ |
| 716 | |
| 717 | /* Bulk and interrupt endpoint completion handlers. |
| 718 | * These always run in_irq. */ |
| 719 | |
| 720 | static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req) |
| 721 | { |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 722 | struct fsg_dev *fsg = ep->driver_data; |
| 723 | struct fsg_buffhd *bh = req->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
| 725 | if (req->status || req->actual != req->length) |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 726 | DBG(fsg, "%s --> %d, %u/%u\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | req->status, req->actual, req->length); |
| 728 | if (req->status == -ECONNRESET) // Request was cancelled |
| 729 | usb_ep_fifo_flush(ep); |
| 730 | |
| 731 | /* Hold the lock while we update the request and buffer states */ |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 732 | smp_wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | spin_lock(&fsg->lock); |
| 734 | bh->inreq_busy = 0; |
| 735 | bh->state = BUF_STATE_EMPTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | wakeup_thread(fsg); |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 737 | spin_unlock(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req) |
| 741 | { |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 742 | struct fsg_dev *fsg = ep->driver_data; |
| 743 | struct fsg_buffhd *bh = req->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
| 745 | dump_msg(fsg, "bulk-out", req->buf, req->actual); |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 746 | if (req->status || req->actual != bh->bulk_out_intended_length) |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 747 | DBG(fsg, "%s --> %d, %u/%u\n", __func__, |
Greg Kroah-Hartman | 98346f7 | 2011-04-14 13:42:46 -0700 | [diff] [blame] | 748 | req->status, req->actual, |
| 749 | bh->bulk_out_intended_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | if (req->status == -ECONNRESET) // Request was cancelled |
| 751 | usb_ep_fifo_flush(ep); |
| 752 | |
| 753 | /* Hold the lock while we update the request and buffer states */ |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 754 | smp_wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | spin_lock(&fsg->lock); |
| 756 | bh->outreq_busy = 0; |
| 757 | bh->state = BUF_STATE_FULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | wakeup_thread(fsg); |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 759 | spin_unlock(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
| 761 | |
| 762 | |
| 763 | #ifdef CONFIG_USB_FILE_STORAGE_TEST |
| 764 | static void intr_in_complete(struct usb_ep *ep, struct usb_request *req) |
| 765 | { |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 766 | struct fsg_dev *fsg = ep->driver_data; |
| 767 | struct fsg_buffhd *bh = req->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
| 769 | if (req->status || req->actual != req->length) |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 770 | DBG(fsg, "%s --> %d, %u/%u\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | req->status, req->actual, req->length); |
| 772 | if (req->status == -ECONNRESET) // Request was cancelled |
| 773 | usb_ep_fifo_flush(ep); |
| 774 | |
| 775 | /* Hold the lock while we update the request and buffer states */ |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 776 | smp_wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | spin_lock(&fsg->lock); |
| 778 | fsg->intreq_busy = 0; |
| 779 | bh->state = BUF_STATE_EMPTY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | wakeup_thread(fsg); |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 781 | spin_unlock(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
| 783 | |
| 784 | #else |
| 785 | static void intr_in_complete(struct usb_ep *ep, struct usb_request *req) |
| 786 | {} |
| 787 | #endif /* CONFIG_USB_FILE_STORAGE_TEST */ |
| 788 | |
| 789 | |
| 790 | /*-------------------------------------------------------------------------*/ |
| 791 | |
| 792 | /* Ep0 class-specific handlers. These always run in_irq. */ |
| 793 | |
| 794 | #ifdef CONFIG_USB_FILE_STORAGE_TEST |
| 795 | static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 796 | { |
| 797 | struct usb_request *req = fsg->ep0req; |
| 798 | static u8 cbi_reset_cmnd[6] = { |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 799 | SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
| 801 | /* Error in command transfer? */ |
| 802 | if (req->status || req->length != req->actual || |
| 803 | req->actual < 6 || req->actual > MAX_COMMAND_SIZE) { |
| 804 | |
| 805 | /* Not all controllers allow a protocol stall after |
| 806 | * receiving control-out data, but we'll try anyway. */ |
| 807 | fsg_set_halt(fsg, fsg->ep0); |
| 808 | return; // Wait for reset |
| 809 | } |
| 810 | |
| 811 | /* Is it the special reset command? */ |
| 812 | if (req->actual >= sizeof cbi_reset_cmnd && |
| 813 | memcmp(req->buf, cbi_reset_cmnd, |
| 814 | sizeof cbi_reset_cmnd) == 0) { |
| 815 | |
| 816 | /* Raise an exception to stop the current operation |
| 817 | * and reinitialize our state. */ |
| 818 | DBG(fsg, "cbi reset request\n"); |
| 819 | raise_exception(fsg, FSG_STATE_RESET); |
| 820 | return; |
| 821 | } |
| 822 | |
| 823 | VDBG(fsg, "CB[I] accept device-specific command\n"); |
| 824 | spin_lock(&fsg->lock); |
| 825 | |
| 826 | /* Save the command for later */ |
| 827 | if (fsg->cbbuf_cmnd_size) |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 828 | WARNING(fsg, "CB[I] overwriting previous command\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | fsg->cbbuf_cmnd_size = req->actual; |
| 830 | memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size); |
| 831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | wakeup_thread(fsg); |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 833 | spin_unlock(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | #else |
| 837 | static void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 838 | {} |
| 839 | #endif /* CONFIG_USB_FILE_STORAGE_TEST */ |
| 840 | |
| 841 | |
| 842 | static int class_setup_req(struct fsg_dev *fsg, |
| 843 | const struct usb_ctrlrequest *ctrl) |
| 844 | { |
| 845 | struct usb_request *req = fsg->ep0req; |
| 846 | int value = -EOPNOTSUPP; |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 847 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
Luis Lloret | 88e45db | 2007-07-26 10:08:47 -0400 | [diff] [blame] | 848 | u16 w_value = le16_to_cpu(ctrl->wValue); |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 849 | u16 w_length = le16_to_cpu(ctrl->wLength); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
| 851 | if (!fsg->config) |
| 852 | return value; |
| 853 | |
| 854 | /* Handle Bulk-only class-specific requests */ |
| 855 | if (transport_is_bbb()) { |
| 856 | switch (ctrl->bRequest) { |
| 857 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 858 | case US_BULK_RESET_REQUEST: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | if (ctrl->bRequestType != (USB_DIR_OUT | |
| 860 | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
| 861 | break; |
Paul Zimmerman | ce7b612 | 2011-10-26 12:07:54 -0700 | [diff] [blame] | 862 | if (w_index != 0 || w_value != 0 || w_length != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | value = -EDOM; |
| 864 | break; |
| 865 | } |
| 866 | |
| 867 | /* Raise an exception to stop the current operation |
| 868 | * and reinitialize our state. */ |
| 869 | DBG(fsg, "bulk reset request\n"); |
| 870 | raise_exception(fsg, FSG_STATE_RESET); |
| 871 | value = DELAYED_STATUS; |
| 872 | break; |
| 873 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 874 | case US_BULK_GET_MAX_LUN: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | if (ctrl->bRequestType != (USB_DIR_IN | |
| 876 | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
| 877 | break; |
Paul Zimmerman | db332bc | 2011-10-13 17:46:36 -0700 | [diff] [blame] | 878 | if (w_index != 0 || w_value != 0 || w_length != 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | value = -EDOM; |
| 880 | break; |
| 881 | } |
| 882 | VDBG(fsg, "get max LUN\n"); |
| 883 | *(u8 *) req->buf = fsg->nluns - 1; |
Alan Stern | 76f4af8 | 2005-04-05 11:56:54 -0400 | [diff] [blame] | 884 | value = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | break; |
| 886 | } |
| 887 | } |
| 888 | |
| 889 | /* Handle CBI class-specific requests */ |
| 890 | else { |
| 891 | switch (ctrl->bRequest) { |
| 892 | |
| 893 | case USB_CBI_ADSC_REQUEST: |
| 894 | if (ctrl->bRequestType != (USB_DIR_OUT | |
| 895 | USB_TYPE_CLASS | USB_RECIP_INTERFACE)) |
| 896 | break; |
Luis Lloret | 88e45db | 2007-07-26 10:08:47 -0400 | [diff] [blame] | 897 | if (w_index != 0 || w_value != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | value = -EDOM; |
| 899 | break; |
| 900 | } |
| 901 | if (w_length > MAX_COMMAND_SIZE) { |
| 902 | value = -EOVERFLOW; |
| 903 | break; |
| 904 | } |
| 905 | value = w_length; |
| 906 | fsg->ep0req->context = received_cbi_adsc; |
| 907 | break; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | if (value == -EOPNOTSUPP) |
| 912 | VDBG(fsg, |
| 913 | "unknown class-specific control req " |
| 914 | "%02x.%02x v%04x i%04x l%u\n", |
| 915 | ctrl->bRequestType, ctrl->bRequest, |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 916 | le16_to_cpu(ctrl->wValue), w_index, w_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | return value; |
| 918 | } |
| 919 | |
| 920 | |
| 921 | /*-------------------------------------------------------------------------*/ |
| 922 | |
| 923 | /* Ep0 standard request handlers. These always run in_irq. */ |
| 924 | |
| 925 | static int standard_setup_req(struct fsg_dev *fsg, |
| 926 | const struct usb_ctrlrequest *ctrl) |
| 927 | { |
| 928 | struct usb_request *req = fsg->ep0req; |
| 929 | int value = -EOPNOTSUPP; |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 930 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
| 931 | u16 w_value = le16_to_cpu(ctrl->wValue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
| 933 | /* Usually this just stores reply data in the pre-allocated ep0 buffer, |
| 934 | * but config change events will also reconfigure hardware. */ |
| 935 | switch (ctrl->bRequest) { |
| 936 | |
| 937 | case USB_REQ_GET_DESCRIPTOR: |
| 938 | if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | |
| 939 | USB_RECIP_DEVICE)) |
| 940 | break; |
| 941 | switch (w_value >> 8) { |
| 942 | |
| 943 | case USB_DT_DEVICE: |
| 944 | VDBG(fsg, "get device descriptor\n"); |
Sebastian Andrzej Siewior | 765f5b8 | 2011-06-23 14:26:11 +0200 | [diff] [blame] | 945 | device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket; |
Alan Stern | 76f4af8 | 2005-04-05 11:56:54 -0400 | [diff] [blame] | 946 | value = sizeof device_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | memcpy(req->buf, &device_desc, value); |
| 948 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | case USB_DT_DEVICE_QUALIFIER: |
| 950 | VDBG(fsg, "get device qualifier\n"); |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 951 | if (!gadget_is_dualspeed(fsg->gadget) || |
| 952 | fsg->gadget->speed == USB_SPEED_SUPER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | break; |
Sebastian Andrzej Siewior | 765f5b8 | 2011-06-23 14:26:11 +0200 | [diff] [blame] | 954 | /* |
| 955 | * Assume ep0 uses the same maxpacket value for both |
| 956 | * speeds |
| 957 | */ |
| 958 | dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket; |
Alan Stern | 76f4af8 | 2005-04-05 11:56:54 -0400 | [diff] [blame] | 959 | value = sizeof dev_qualifier; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | memcpy(req->buf, &dev_qualifier, value); |
| 961 | break; |
| 962 | |
| 963 | case USB_DT_OTHER_SPEED_CONFIG: |
| 964 | VDBG(fsg, "get other-speed config descriptor\n"); |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 965 | if (!gadget_is_dualspeed(fsg->gadget) || |
| 966 | fsg->gadget->speed == USB_SPEED_SUPER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | break; |
| 968 | goto get_config; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | case USB_DT_CONFIG: |
| 970 | VDBG(fsg, "get configuration descriptor\n"); |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 971 | get_config: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | value = populate_config_buf(fsg->gadget, |
| 973 | req->buf, |
| 974 | w_value >> 8, |
| 975 | w_value & 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | break; |
| 977 | |
| 978 | case USB_DT_STRING: |
| 979 | VDBG(fsg, "get string descriptor\n"); |
| 980 | |
| 981 | /* wIndex == language code */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 982 | value = usb_gadget_get_string(&fsg_stringtab, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | w_value & 0xff, req->buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | break; |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 985 | |
| 986 | case USB_DT_BOS: |
| 987 | VDBG(fsg, "get bos descriptor\n"); |
| 988 | |
| 989 | if (gadget_is_superspeed(fsg->gadget)) |
| 990 | value = populate_bos(fsg, req->buf); |
| 991 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | } |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | break; |
| 995 | |
| 996 | /* One config, two speeds */ |
| 997 | case USB_REQ_SET_CONFIGURATION: |
| 998 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | |
| 999 | USB_RECIP_DEVICE)) |
| 1000 | break; |
| 1001 | VDBG(fsg, "set configuration\n"); |
| 1002 | if (w_value == CONFIG_VALUE || w_value == 0) { |
| 1003 | fsg->new_config = w_value; |
| 1004 | |
| 1005 | /* Raise an exception to wipe out previous transaction |
| 1006 | * state (queued bufs, etc) and set the new config. */ |
| 1007 | raise_exception(fsg, FSG_STATE_CONFIG_CHANGE); |
| 1008 | value = DELAYED_STATUS; |
| 1009 | } |
| 1010 | break; |
| 1011 | case USB_REQ_GET_CONFIGURATION: |
| 1012 | if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | |
| 1013 | USB_RECIP_DEVICE)) |
| 1014 | break; |
| 1015 | VDBG(fsg, "get configuration\n"); |
| 1016 | *(u8 *) req->buf = fsg->config; |
Alan Stern | 76f4af8 | 2005-04-05 11:56:54 -0400 | [diff] [blame] | 1017 | value = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | break; |
| 1019 | |
| 1020 | case USB_REQ_SET_INTERFACE: |
| 1021 | if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD | |
| 1022 | USB_RECIP_INTERFACE)) |
| 1023 | break; |
| 1024 | if (fsg->config && w_index == 0) { |
| 1025 | |
| 1026 | /* Raise an exception to wipe out previous transaction |
| 1027 | * state (queued bufs, etc) and install the new |
| 1028 | * interface altsetting. */ |
| 1029 | raise_exception(fsg, FSG_STATE_INTERFACE_CHANGE); |
| 1030 | value = DELAYED_STATUS; |
| 1031 | } |
| 1032 | break; |
| 1033 | case USB_REQ_GET_INTERFACE: |
| 1034 | if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | |
| 1035 | USB_RECIP_INTERFACE)) |
| 1036 | break; |
| 1037 | if (!fsg->config) |
| 1038 | break; |
| 1039 | if (w_index != 0) { |
| 1040 | value = -EDOM; |
| 1041 | break; |
| 1042 | } |
| 1043 | VDBG(fsg, "get interface\n"); |
| 1044 | *(u8 *) req->buf = 0; |
Alan Stern | 76f4af8 | 2005-04-05 11:56:54 -0400 | [diff] [blame] | 1045 | value = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | break; |
| 1047 | |
| 1048 | default: |
| 1049 | VDBG(fsg, |
| 1050 | "unknown control req %02x.%02x v%04x i%04x l%u\n", |
| 1051 | ctrl->bRequestType, ctrl->bRequest, |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 1052 | w_value, w_index, le16_to_cpu(ctrl->wLength)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | } |
| 1054 | |
| 1055 | return value; |
| 1056 | } |
| 1057 | |
| 1058 | |
| 1059 | static int fsg_setup(struct usb_gadget *gadget, |
| 1060 | const struct usb_ctrlrequest *ctrl) |
| 1061 | { |
| 1062 | struct fsg_dev *fsg = get_gadget_data(gadget); |
| 1063 | int rc; |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 1064 | int w_length = le16_to_cpu(ctrl->wLength); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
| 1066 | ++fsg->ep0_req_tag; // Record arrival of a new request |
| 1067 | fsg->ep0req->context = NULL; |
| 1068 | fsg->ep0req->length = 0; |
| 1069 | dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl)); |
| 1070 | |
| 1071 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) |
| 1072 | rc = class_setup_req(fsg, ctrl); |
| 1073 | else |
| 1074 | rc = standard_setup_req(fsg, ctrl); |
| 1075 | |
| 1076 | /* Respond with data/status or defer until later? */ |
| 1077 | if (rc >= 0 && rc != DELAYED_STATUS) { |
Alan Stern | 76f4af8 | 2005-04-05 11:56:54 -0400 | [diff] [blame] | 1078 | rc = min(rc, w_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | fsg->ep0req->length = rc; |
David Brownell | 1bbc169 | 2005-05-07 13:05:13 -0700 | [diff] [blame] | 1080 | fsg->ep0req->zero = rc < w_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ? |
| 1082 | "ep0-in" : "ep0-out"); |
| 1083 | rc = ep0_queue(fsg); |
| 1084 | } |
| 1085 | |
| 1086 | /* Device either stalls (rc < 0) or reports success */ |
| 1087 | return rc; |
| 1088 | } |
| 1089 | |
| 1090 | |
| 1091 | /*-------------------------------------------------------------------------*/ |
| 1092 | |
| 1093 | /* All the following routines run in process context */ |
| 1094 | |
| 1095 | |
| 1096 | /* Use this for bulk or interrupt transfers, not ep0 */ |
| 1097 | static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep, |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1098 | struct usb_request *req, int *pbusy, |
| 1099 | enum fsg_buffer_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | { |
| 1101 | int rc; |
| 1102 | |
| 1103 | if (ep == fsg->bulk_in) |
| 1104 | dump_msg(fsg, "bulk-in", req->buf, req->length); |
| 1105 | else if (ep == fsg->intr_in) |
| 1106 | dump_msg(fsg, "intr-in", req->buf, req->length); |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1107 | |
| 1108 | spin_lock_irq(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | *pbusy = 1; |
| 1110 | *state = BUF_STATE_BUSY; |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1111 | spin_unlock_irq(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | rc = usb_ep_queue(ep, req, GFP_KERNEL); |
| 1113 | if (rc != 0) { |
| 1114 | *pbusy = 0; |
| 1115 | *state = BUF_STATE_EMPTY; |
| 1116 | |
| 1117 | /* We can't do much more than wait for a reset */ |
| 1118 | |
| 1119 | /* Note: currently the net2280 driver fails zero-length |
| 1120 | * submissions if DMA is enabled. */ |
| 1121 | if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP && |
| 1122 | req->length == 0)) |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 1123 | WARNING(fsg, "error in submission: %s --> %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | ep->name, rc); |
| 1125 | } |
| 1126 | } |
| 1127 | |
| 1128 | |
| 1129 | static int sleep_thread(struct fsg_dev *fsg) |
| 1130 | { |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1131 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
| 1133 | /* Wait until a signal arrives or we are woken up */ |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1134 | for (;;) { |
| 1135 | try_to_freeze(); |
| 1136 | set_current_state(TASK_INTERRUPTIBLE); |
| 1137 | if (signal_pending(current)) { |
| 1138 | rc = -EINTR; |
| 1139 | break; |
| 1140 | } |
| 1141 | if (fsg->thread_wakeup_needed) |
| 1142 | break; |
| 1143 | schedule(); |
| 1144 | } |
| 1145 | __set_current_state(TASK_RUNNING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | fsg->thread_wakeup_needed = 0; |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1147 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | |
| 1151 | /*-------------------------------------------------------------------------*/ |
| 1152 | |
| 1153 | static int do_read(struct fsg_dev *fsg) |
| 1154 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1155 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | u32 lba; |
| 1157 | struct fsg_buffhd *bh; |
| 1158 | int rc; |
| 1159 | u32 amount_left; |
| 1160 | loff_t file_offset, file_offset_tmp; |
| 1161 | unsigned int amount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | ssize_t nread; |
| 1163 | |
| 1164 | /* Get the starting Logical Block Address and check that it's |
| 1165 | * not too big */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1166 | if (fsg->cmnd[0] == READ_6) |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1167 | lba = get_unaligned_be24(&fsg->cmnd[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | else { |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1169 | lba = get_unaligned_be32(&fsg->cmnd[2]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | |
| 1171 | /* We allow DPO (Disable Page Out = don't save data in the |
| 1172 | * cache) and FUA (Force Unit Access = don't read from the |
| 1173 | * cache), but we don't implement them. */ |
| 1174 | if ((fsg->cmnd[1] & ~0x18) != 0) { |
| 1175 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1176 | return -EINVAL; |
| 1177 | } |
| 1178 | } |
| 1179 | if (lba >= curlun->num_sectors) { |
| 1180 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1181 | return -EINVAL; |
| 1182 | } |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1183 | file_offset = ((loff_t) lba) << curlun->blkbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | |
| 1185 | /* Carry out the file reads */ |
| 1186 | amount_left = fsg->data_size_from_cmnd; |
| 1187 | if (unlikely(amount_left == 0)) |
| 1188 | return -EIO; // No default reply |
| 1189 | |
| 1190 | for (;;) { |
| 1191 | |
| 1192 | /* Figure out how much we need to read: |
| 1193 | * Try to read the remaining amount. |
| 1194 | * But don't read more than the buffer size. |
| 1195 | * And don't try to read past the end of the file. |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1196 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | amount = min((unsigned int) amount_left, mod_data.buflen); |
| 1198 | amount = min((loff_t) amount, |
| 1199 | curlun->file_length - file_offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
| 1201 | /* Wait for the next buffer to become available */ |
| 1202 | bh = fsg->next_buffhd_to_fill; |
| 1203 | while (bh->state != BUF_STATE_EMPTY) { |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 1204 | rc = sleep_thread(fsg); |
| 1205 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | return rc; |
| 1207 | } |
| 1208 | |
| 1209 | /* If we were asked to read past the end of file, |
| 1210 | * end with an empty buffer. */ |
| 1211 | if (amount == 0) { |
| 1212 | curlun->sense_data = |
| 1213 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1214 | curlun->sense_data_info = file_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1215 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | bh->inreq->length = 0; |
| 1217 | bh->state = BUF_STATE_FULL; |
| 1218 | break; |
| 1219 | } |
| 1220 | |
| 1221 | /* Perform the read */ |
| 1222 | file_offset_tmp = file_offset; |
| 1223 | nread = vfs_read(curlun->filp, |
| 1224 | (char __user *) bh->buf, |
| 1225 | amount, &file_offset_tmp); |
| 1226 | VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, |
| 1227 | (unsigned long long) file_offset, |
| 1228 | (int) nread); |
| 1229 | if (signal_pending(current)) |
| 1230 | return -EINTR; |
| 1231 | |
| 1232 | if (nread < 0) { |
| 1233 | LDBG(curlun, "error in file read: %d\n", |
| 1234 | (int) nread); |
| 1235 | nread = 0; |
| 1236 | } else if (nread < amount) { |
| 1237 | LDBG(curlun, "partial file read: %d/%u\n", |
| 1238 | (int) nread, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1239 | nread = round_down(nread, curlun->blksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | } |
| 1241 | file_offset += nread; |
| 1242 | amount_left -= nread; |
| 1243 | fsg->residue -= nread; |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1244 | |
| 1245 | /* Except at the end of the transfer, nread will be |
| 1246 | * equal to the buffer size, which is divisible by the |
| 1247 | * bulk-in maxpacket size. |
| 1248 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | bh->inreq->length = nread; |
| 1250 | bh->state = BUF_STATE_FULL; |
| 1251 | |
| 1252 | /* If an error occurred, report it and its position */ |
| 1253 | if (nread < amount) { |
| 1254 | curlun->sense_data = SS_UNRECOVERED_READ_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1255 | curlun->sense_data_info = file_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1256 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | break; |
| 1258 | } |
| 1259 | |
| 1260 | if (amount_left == 0) |
| 1261 | break; // No more left to read |
| 1262 | |
| 1263 | /* Send this buffer and go read some more */ |
| 1264 | bh->inreq->zero = 0; |
| 1265 | start_transfer(fsg, fsg->bulk_in, bh->inreq, |
| 1266 | &bh->inreq_busy, &bh->state); |
| 1267 | fsg->next_buffhd_to_fill = bh->next; |
| 1268 | } |
| 1269 | |
| 1270 | return -EIO; // No default reply |
| 1271 | } |
| 1272 | |
| 1273 | |
| 1274 | /*-------------------------------------------------------------------------*/ |
| 1275 | |
| 1276 | static int do_write(struct fsg_dev *fsg) |
| 1277 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1278 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | u32 lba; |
| 1280 | struct fsg_buffhd *bh; |
| 1281 | int get_some_more; |
| 1282 | u32 amount_left_to_req, amount_left_to_write; |
| 1283 | loff_t usb_offset, file_offset, file_offset_tmp; |
| 1284 | unsigned int amount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | ssize_t nwritten; |
| 1286 | int rc; |
| 1287 | |
| 1288 | if (curlun->ro) { |
| 1289 | curlun->sense_data = SS_WRITE_PROTECTED; |
| 1290 | return -EINVAL; |
| 1291 | } |
Jonathan Corbet | db1dd4d | 2009-02-06 15:25:24 -0700 | [diff] [blame] | 1292 | spin_lock(&curlun->filp->f_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | curlun->filp->f_flags &= ~O_SYNC; // Default is not to wait |
Jonathan Corbet | db1dd4d | 2009-02-06 15:25:24 -0700 | [diff] [blame] | 1294 | spin_unlock(&curlun->filp->f_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | |
| 1296 | /* Get the starting Logical Block Address and check that it's |
| 1297 | * not too big */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1298 | if (fsg->cmnd[0] == WRITE_6) |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1299 | lba = get_unaligned_be24(&fsg->cmnd[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | else { |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1301 | lba = get_unaligned_be32(&fsg->cmnd[2]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
| 1303 | /* We allow DPO (Disable Page Out = don't save data in the |
| 1304 | * cache) and FUA (Force Unit Access = write directly to the |
| 1305 | * medium). We don't implement DPO; we implement FUA by |
| 1306 | * performing synchronous output. */ |
| 1307 | if ((fsg->cmnd[1] & ~0x18) != 0) { |
| 1308 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1309 | return -EINVAL; |
| 1310 | } |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 1311 | /* FUA */ |
| 1312 | if (!curlun->nofua && (fsg->cmnd[1] & 0x08)) { |
Jonathan Corbet | db1dd4d | 2009-02-06 15:25:24 -0700 | [diff] [blame] | 1313 | spin_lock(&curlun->filp->f_lock); |
Christoph Hellwig | 6b2f3d1 | 2009-10-27 11:05:28 +0100 | [diff] [blame] | 1314 | curlun->filp->f_flags |= O_DSYNC; |
Jonathan Corbet | db1dd4d | 2009-02-06 15:25:24 -0700 | [diff] [blame] | 1315 | spin_unlock(&curlun->filp->f_lock); |
| 1316 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | } |
| 1318 | if (lba >= curlun->num_sectors) { |
| 1319 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1320 | return -EINVAL; |
| 1321 | } |
| 1322 | |
| 1323 | /* Carry out the file writes */ |
| 1324 | get_some_more = 1; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1325 | file_offset = usb_offset = ((loff_t) lba) << curlun->blkbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd; |
| 1327 | |
| 1328 | while (amount_left_to_write > 0) { |
| 1329 | |
| 1330 | /* Queue a request for more data from the host */ |
| 1331 | bh = fsg->next_buffhd_to_fill; |
| 1332 | if (bh->state == BUF_STATE_EMPTY && get_some_more) { |
| 1333 | |
| 1334 | /* Figure out how much we want to get: |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1335 | * Try to get the remaining amount, |
| 1336 | * but not more than the buffer size. |
| 1337 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | amount = min(amount_left_to_req, mod_data.buflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1340 | /* Beyond the end of the backing file? */ |
| 1341 | if (usb_offset >= curlun->file_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | get_some_more = 0; |
| 1343 | curlun->sense_data = |
| 1344 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1345 | curlun->sense_data_info = usb_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1346 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | continue; |
| 1348 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | |
| 1350 | /* Get the next buffer */ |
| 1351 | usb_offset += amount; |
| 1352 | fsg->usb_amount_left -= amount; |
| 1353 | amount_left_to_req -= amount; |
| 1354 | if (amount_left_to_req == 0) |
| 1355 | get_some_more = 0; |
| 1356 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1357 | /* Except at the end of the transfer, amount will be |
| 1358 | * equal to the buffer size, which is divisible by |
| 1359 | * the bulk-out maxpacket size. |
| 1360 | */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1361 | set_bulk_out_req_length(fsg, bh, amount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | start_transfer(fsg, fsg->bulk_out, bh->outreq, |
| 1363 | &bh->outreq_busy, &bh->state); |
| 1364 | fsg->next_buffhd_to_fill = bh->next; |
| 1365 | continue; |
| 1366 | } |
| 1367 | |
| 1368 | /* Write the received data to the backing file */ |
| 1369 | bh = fsg->next_buffhd_to_drain; |
| 1370 | if (bh->state == BUF_STATE_EMPTY && !get_some_more) |
| 1371 | break; // We stopped early |
| 1372 | if (bh->state == BUF_STATE_FULL) { |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1373 | smp_rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | fsg->next_buffhd_to_drain = bh->next; |
| 1375 | bh->state = BUF_STATE_EMPTY; |
| 1376 | |
| 1377 | /* Did something go wrong with the transfer? */ |
| 1378 | if (bh->outreq->status != 0) { |
| 1379 | curlun->sense_data = SS_COMMUNICATION_FAILURE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1380 | curlun->sense_data_info = file_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1381 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | break; |
| 1383 | } |
| 1384 | |
| 1385 | amount = bh->outreq->actual; |
| 1386 | if (curlun->file_length - file_offset < amount) { |
| 1387 | LERROR(curlun, |
| 1388 | "write %u @ %llu beyond end %llu\n", |
| 1389 | amount, (unsigned long long) file_offset, |
| 1390 | (unsigned long long) curlun->file_length); |
| 1391 | amount = curlun->file_length - file_offset; |
| 1392 | } |
| 1393 | |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1394 | /* Don't accept excess data. The spec doesn't say |
| 1395 | * what to do in this case. We'll ignore the error. |
| 1396 | */ |
| 1397 | amount = min(amount, bh->bulk_out_intended_length); |
| 1398 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1399 | /* Don't write a partial block */ |
| 1400 | amount = round_down(amount, curlun->blksize); |
| 1401 | if (amount == 0) |
| 1402 | goto empty_write; |
| 1403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | /* Perform the write */ |
| 1405 | file_offset_tmp = file_offset; |
| 1406 | nwritten = vfs_write(curlun->filp, |
| 1407 | (char __user *) bh->buf, |
| 1408 | amount, &file_offset_tmp); |
| 1409 | VLDBG(curlun, "file write %u @ %llu -> %d\n", amount, |
| 1410 | (unsigned long long) file_offset, |
| 1411 | (int) nwritten); |
| 1412 | if (signal_pending(current)) |
| 1413 | return -EINTR; // Interrupted! |
| 1414 | |
| 1415 | if (nwritten < 0) { |
| 1416 | LDBG(curlun, "error in file write: %d\n", |
| 1417 | (int) nwritten); |
| 1418 | nwritten = 0; |
| 1419 | } else if (nwritten < amount) { |
| 1420 | LDBG(curlun, "partial file write: %d/%u\n", |
| 1421 | (int) nwritten, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1422 | nwritten = round_down(nwritten, curlun->blksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | } |
| 1424 | file_offset += nwritten; |
| 1425 | amount_left_to_write -= nwritten; |
| 1426 | fsg->residue -= nwritten; |
| 1427 | |
| 1428 | /* If an error occurred, report it and its position */ |
| 1429 | if (nwritten < amount) { |
| 1430 | curlun->sense_data = SS_WRITE_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1431 | curlun->sense_data_info = file_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1432 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | break; |
| 1434 | } |
| 1435 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1436 | empty_write: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | /* Did the host decide to stop early? */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1438 | if (bh->outreq->actual < bh->bulk_out_intended_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | fsg->short_packet_received = 1; |
| 1440 | break; |
| 1441 | } |
| 1442 | continue; |
| 1443 | } |
| 1444 | |
| 1445 | /* Wait for something to happen */ |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 1446 | rc = sleep_thread(fsg); |
| 1447 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | return rc; |
| 1449 | } |
| 1450 | |
| 1451 | return -EIO; // No default reply |
| 1452 | } |
| 1453 | |
| 1454 | |
| 1455 | /*-------------------------------------------------------------------------*/ |
| 1456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | static int do_synchronize_cache(struct fsg_dev *fsg) |
| 1458 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1459 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | int rc; |
| 1461 | |
| 1462 | /* We ignore the requested LBA and write out all file's |
| 1463 | * dirty data buffers. */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1464 | rc = fsg_lun_fsync_sub(curlun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | if (rc) |
| 1466 | curlun->sense_data = SS_WRITE_ERROR; |
| 1467 | return 0; |
| 1468 | } |
| 1469 | |
| 1470 | |
| 1471 | /*-------------------------------------------------------------------------*/ |
| 1472 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1473 | static void invalidate_sub(struct fsg_lun *curlun) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | { |
| 1475 | struct file *filp = curlun->filp; |
Josef Sipek | 33cb899 | 2006-12-08 02:37:46 -0800 | [diff] [blame] | 1476 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | unsigned long rc; |
| 1478 | |
Andrew Morton | fc0ecff | 2007-02-10 01:45:39 -0800 | [diff] [blame] | 1479 | rc = invalidate_mapping_pages(inode->i_mapping, 0, -1); |
Christoph Hellwig | 2ecdc82 | 2010-01-26 17:27:20 +0100 | [diff] [blame] | 1480 | VLDBG(curlun, "invalidate_mapping_pages -> %ld\n", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | } |
| 1482 | |
| 1483 | static int do_verify(struct fsg_dev *fsg) |
| 1484 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1485 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | u32 lba; |
| 1487 | u32 verification_length; |
| 1488 | struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; |
| 1489 | loff_t file_offset, file_offset_tmp; |
| 1490 | u32 amount_left; |
| 1491 | unsigned int amount; |
| 1492 | ssize_t nread; |
| 1493 | |
| 1494 | /* Get the starting Logical Block Address and check that it's |
| 1495 | * not too big */ |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1496 | lba = get_unaligned_be32(&fsg->cmnd[2]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | if (lba >= curlun->num_sectors) { |
| 1498 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1499 | return -EINVAL; |
| 1500 | } |
| 1501 | |
| 1502 | /* We allow DPO (Disable Page Out = don't save data in the |
| 1503 | * cache) but we don't implement it. */ |
| 1504 | if ((fsg->cmnd[1] & ~0x10) != 0) { |
| 1505 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1506 | return -EINVAL; |
| 1507 | } |
| 1508 | |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1509 | verification_length = get_unaligned_be16(&fsg->cmnd[7]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | if (unlikely(verification_length == 0)) |
| 1511 | return -EIO; // No default reply |
| 1512 | |
| 1513 | /* Prepare to carry out the file verify */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1514 | amount_left = verification_length << curlun->blkbits; |
| 1515 | file_offset = ((loff_t) lba) << curlun->blkbits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
| 1517 | /* Write out all the dirty buffers before invalidating them */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1518 | fsg_lun_fsync_sub(curlun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | if (signal_pending(current)) |
| 1520 | return -EINTR; |
| 1521 | |
| 1522 | invalidate_sub(curlun); |
| 1523 | if (signal_pending(current)) |
| 1524 | return -EINTR; |
| 1525 | |
| 1526 | /* Just try to read the requested blocks */ |
| 1527 | while (amount_left > 0) { |
| 1528 | |
| 1529 | /* Figure out how much we need to read: |
| 1530 | * Try to read the remaining amount, but not more than |
| 1531 | * the buffer size. |
| 1532 | * And don't try to read past the end of the file. |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1533 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | amount = min((unsigned int) amount_left, mod_data.buflen); |
| 1535 | amount = min((loff_t) amount, |
| 1536 | curlun->file_length - file_offset); |
| 1537 | if (amount == 0) { |
| 1538 | curlun->sense_data = |
| 1539 | SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1540 | curlun->sense_data_info = file_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1541 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | break; |
| 1543 | } |
| 1544 | |
| 1545 | /* Perform the read */ |
| 1546 | file_offset_tmp = file_offset; |
| 1547 | nread = vfs_read(curlun->filp, |
| 1548 | (char __user *) bh->buf, |
| 1549 | amount, &file_offset_tmp); |
| 1550 | VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, |
| 1551 | (unsigned long long) file_offset, |
| 1552 | (int) nread); |
| 1553 | if (signal_pending(current)) |
| 1554 | return -EINTR; |
| 1555 | |
| 1556 | if (nread < 0) { |
| 1557 | LDBG(curlun, "error in file verify: %d\n", |
| 1558 | (int) nread); |
| 1559 | nread = 0; |
| 1560 | } else if (nread < amount) { |
| 1561 | LDBG(curlun, "partial file verify: %d/%u\n", |
| 1562 | (int) nread, amount); |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1563 | nread = round_down(nread, curlun->blksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | } |
| 1565 | if (nread == 0) { |
| 1566 | curlun->sense_data = SS_UNRECOVERED_READ_ERROR; |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1567 | curlun->sense_data_info = file_offset >> curlun->blkbits; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1568 | curlun->info_valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | break; |
| 1570 | } |
| 1571 | file_offset += nread; |
| 1572 | amount_left -= nread; |
| 1573 | } |
| 1574 | return 0; |
| 1575 | } |
| 1576 | |
| 1577 | |
| 1578 | /*-------------------------------------------------------------------------*/ |
| 1579 | |
| 1580 | static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1581 | { |
| 1582 | u8 *buf = (u8 *) bh->buf; |
| 1583 | |
| 1584 | static char vendor_id[] = "Linux "; |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1585 | static char product_disk_id[] = "File-Stor Gadget"; |
| 1586 | static char product_cdrom_id[] = "File-CD Gadget "; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | |
| 1588 | if (!fsg->curlun) { // Unsupported LUNs are okay |
| 1589 | fsg->bad_lun_okay = 1; |
| 1590 | memset(buf, 0, 36); |
| 1591 | buf[0] = 0x7f; // Unsupported, no device-type |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1592 | buf[4] = 31; // Additional length |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | return 36; |
| 1594 | } |
| 1595 | |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1596 | memset(buf, 0, 8); |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1597 | buf[0] = (mod_data.cdrom ? TYPE_ROM : TYPE_DISK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | if (mod_data.removable) |
| 1599 | buf[1] = 0x80; |
| 1600 | buf[2] = 2; // ANSI SCSI level 2 |
| 1601 | buf[3] = 2; // SCSI-2 INQUIRY data format |
| 1602 | buf[4] = 31; // Additional length |
| 1603 | // No special options |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1604 | sprintf(buf + 8, "%-8s%-16s%04x", vendor_id, |
| 1605 | (mod_data.cdrom ? product_cdrom_id : |
| 1606 | product_disk_id), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | mod_data.release); |
| 1608 | return 36; |
| 1609 | } |
| 1610 | |
| 1611 | |
| 1612 | static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1613 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1614 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | u8 *buf = (u8 *) bh->buf; |
| 1616 | u32 sd, sdinfo; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1617 | int valid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | |
| 1619 | /* |
| 1620 | * From the SCSI-2 spec., section 7.9 (Unit attention condition): |
| 1621 | * |
| 1622 | * If a REQUEST SENSE command is received from an initiator |
| 1623 | * with a pending unit attention condition (before the target |
| 1624 | * generates the contingent allegiance condition), then the |
| 1625 | * target shall either: |
| 1626 | * a) report any pending sense data and preserve the unit |
| 1627 | * attention condition on the logical unit, or, |
| 1628 | * b) report the unit attention condition, may discard any |
| 1629 | * pending sense data, and clear the unit attention |
| 1630 | * condition on the logical unit for that initiator. |
| 1631 | * |
| 1632 | * FSG normally uses option a); enable this code to use option b). |
| 1633 | */ |
| 1634 | #if 0 |
| 1635 | if (curlun && curlun->unit_attention_data != SS_NO_SENSE) { |
| 1636 | curlun->sense_data = curlun->unit_attention_data; |
| 1637 | curlun->unit_attention_data = SS_NO_SENSE; |
| 1638 | } |
| 1639 | #endif |
| 1640 | |
| 1641 | if (!curlun) { // Unsupported LUNs are okay |
| 1642 | fsg->bad_lun_okay = 1; |
| 1643 | sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; |
| 1644 | sdinfo = 0; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1645 | valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | } else { |
| 1647 | sd = curlun->sense_data; |
| 1648 | sdinfo = curlun->sense_data_info; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1649 | valid = curlun->info_valid << 7; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | curlun->sense_data = SS_NO_SENSE; |
| 1651 | curlun->sense_data_info = 0; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1652 | curlun->info_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | } |
| 1654 | |
| 1655 | memset(buf, 0, 18); |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 1656 | buf[0] = valid | 0x70; // Valid, current error |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | buf[2] = SK(sd); |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1658 | put_unaligned_be32(sdinfo, &buf[3]); /* Sense information */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | buf[7] = 18 - 8; // Additional sense length |
| 1660 | buf[12] = ASC(sd); |
| 1661 | buf[13] = ASCQ(sd); |
| 1662 | return 18; |
| 1663 | } |
| 1664 | |
| 1665 | |
| 1666 | static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1667 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1668 | struct fsg_lun *curlun = fsg->curlun; |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1669 | u32 lba = get_unaligned_be32(&fsg->cmnd[2]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | int pmi = fsg->cmnd[8]; |
| 1671 | u8 *buf = (u8 *) bh->buf; |
| 1672 | |
| 1673 | /* Check the PMI and LBA fields */ |
| 1674 | if (pmi > 1 || (pmi == 0 && lba != 0)) { |
| 1675 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1676 | return -EINVAL; |
| 1677 | } |
| 1678 | |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1679 | put_unaligned_be32(curlun->num_sectors - 1, &buf[0]); |
| 1680 | /* Max logical block */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1681 | put_unaligned_be32(curlun->blksize, &buf[4]); /* Block length */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | return 8; |
| 1683 | } |
| 1684 | |
| 1685 | |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1686 | static int do_read_header(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1687 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1688 | struct fsg_lun *curlun = fsg->curlun; |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1689 | int msf = fsg->cmnd[1] & 0x02; |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1690 | u32 lba = get_unaligned_be32(&fsg->cmnd[2]); |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1691 | u8 *buf = (u8 *) bh->buf; |
| 1692 | |
| 1693 | if ((fsg->cmnd[1] & ~0x02) != 0) { /* Mask away MSF */ |
| 1694 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1695 | return -EINVAL; |
| 1696 | } |
| 1697 | if (lba >= curlun->num_sectors) { |
| 1698 | curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; |
| 1699 | return -EINVAL; |
| 1700 | } |
| 1701 | |
| 1702 | memset(buf, 0, 8); |
| 1703 | buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */ |
| 1704 | store_cdrom_address(&buf[4], msf, lba); |
| 1705 | return 8; |
| 1706 | } |
| 1707 | |
| 1708 | |
| 1709 | static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1710 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1711 | struct fsg_lun *curlun = fsg->curlun; |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 1712 | int msf = fsg->cmnd[1] & 0x02; |
| 1713 | int start_track = fsg->cmnd[6]; |
| 1714 | u8 *buf = (u8 *) bh->buf; |
| 1715 | |
| 1716 | if ((fsg->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */ |
| 1717 | start_track > 1) { |
| 1718 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1719 | return -EINVAL; |
| 1720 | } |
| 1721 | |
| 1722 | memset(buf, 0, 20); |
| 1723 | buf[1] = (20-2); /* TOC data length */ |
| 1724 | buf[2] = 1; /* First track number */ |
| 1725 | buf[3] = 1; /* Last track number */ |
| 1726 | buf[5] = 0x16; /* Data track, copying allowed */ |
| 1727 | buf[6] = 0x01; /* Only track is number 1 */ |
| 1728 | store_cdrom_address(&buf[8], msf, 0); |
| 1729 | |
| 1730 | buf[13] = 0x16; /* Lead-out track is data */ |
| 1731 | buf[14] = 0xAA; /* Lead-out track number */ |
| 1732 | store_cdrom_address(&buf[16], msf, curlun->num_sectors); |
| 1733 | return 20; |
| 1734 | } |
| 1735 | |
| 1736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1738 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1739 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | int mscmnd = fsg->cmnd[0]; |
| 1741 | u8 *buf = (u8 *) bh->buf; |
| 1742 | u8 *buf0 = buf; |
| 1743 | int pc, page_code; |
| 1744 | int changeable_values, all_pages; |
| 1745 | int valid_page = 0; |
| 1746 | int len, limit; |
| 1747 | |
| 1748 | if ((fsg->cmnd[1] & ~0x08) != 0) { // Mask away DBD |
| 1749 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1750 | return -EINVAL; |
| 1751 | } |
| 1752 | pc = fsg->cmnd[2] >> 6; |
| 1753 | page_code = fsg->cmnd[2] & 0x3f; |
| 1754 | if (pc == 3) { |
| 1755 | curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED; |
| 1756 | return -EINVAL; |
| 1757 | } |
| 1758 | changeable_values = (pc == 1); |
| 1759 | all_pages = (page_code == 0x3f); |
| 1760 | |
| 1761 | /* Write the mode parameter header. Fixed values are: default |
| 1762 | * medium type, no cache control (DPOFUA), and no block descriptors. |
| 1763 | * The only variable value is the WriteProtect bit. We will fill in |
| 1764 | * the mode data length later. */ |
| 1765 | memset(buf, 0, 8); |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1766 | if (mscmnd == MODE_SENSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | buf[2] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA |
| 1768 | buf += 4; |
| 1769 | limit = 255; |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1770 | } else { // MODE_SENSE_10 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | buf[3] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA |
| 1772 | buf += 8; |
| 1773 | limit = 65535; // Should really be mod_data.buflen |
| 1774 | } |
| 1775 | |
| 1776 | /* No block descriptors */ |
| 1777 | |
| 1778 | /* The mode pages, in numerical order. The only page we support |
| 1779 | * is the Caching page. */ |
| 1780 | if (page_code == 0x08 || all_pages) { |
| 1781 | valid_page = 1; |
| 1782 | buf[0] = 0x08; // Page code |
| 1783 | buf[1] = 10; // Page length |
| 1784 | memset(buf+2, 0, 10); // None of the fields are changeable |
| 1785 | |
| 1786 | if (!changeable_values) { |
| 1787 | buf[2] = 0x04; // Write cache enable, |
| 1788 | // Read cache not disabled |
| 1789 | // No cache retention priorities |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1790 | put_unaligned_be16(0xffff, &buf[4]); |
| 1791 | /* Don't disable prefetch */ |
| 1792 | /* Minimum prefetch = 0 */ |
| 1793 | put_unaligned_be16(0xffff, &buf[8]); |
| 1794 | /* Maximum prefetch */ |
| 1795 | put_unaligned_be16(0xffff, &buf[10]); |
| 1796 | /* Maximum prefetch ceiling */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | } |
| 1798 | buf += 12; |
| 1799 | } |
| 1800 | |
| 1801 | /* Check that a valid page was requested and the mode data length |
| 1802 | * isn't too long. */ |
| 1803 | len = buf - buf0; |
| 1804 | if (!valid_page || len > limit) { |
| 1805 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1806 | return -EINVAL; |
| 1807 | } |
| 1808 | |
| 1809 | /* Store the mode data length */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 1810 | if (mscmnd == MODE_SENSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | buf0[0] = len - 1; |
| 1812 | else |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1813 | put_unaligned_be16(len - 2, buf0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | return len; |
| 1815 | } |
| 1816 | |
| 1817 | |
| 1818 | static int do_start_stop(struct fsg_dev *fsg) |
| 1819 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1820 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | int loej, start; |
| 1822 | |
| 1823 | if (!mod_data.removable) { |
| 1824 | curlun->sense_data = SS_INVALID_COMMAND; |
| 1825 | return -EINVAL; |
| 1826 | } |
| 1827 | |
| 1828 | // int immed = fsg->cmnd[1] & 0x01; |
| 1829 | loej = fsg->cmnd[4] & 0x02; |
| 1830 | start = fsg->cmnd[4] & 0x01; |
| 1831 | |
| 1832 | #ifdef CONFIG_USB_FILE_STORAGE_TEST |
| 1833 | if ((fsg->cmnd[1] & ~0x01) != 0 || // Mask away Immed |
| 1834 | (fsg->cmnd[4] & ~0x03) != 0) { // Mask LoEj, Start |
| 1835 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1836 | return -EINVAL; |
| 1837 | } |
| 1838 | |
| 1839 | if (!start) { |
| 1840 | |
| 1841 | /* Are we allowed to unload the media? */ |
| 1842 | if (curlun->prevent_medium_removal) { |
| 1843 | LDBG(curlun, "unload attempt prevented\n"); |
| 1844 | curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED; |
| 1845 | return -EINVAL; |
| 1846 | } |
| 1847 | if (loej) { // Simulate an unload/eject |
| 1848 | up_read(&fsg->filesem); |
| 1849 | down_write(&fsg->filesem); |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1850 | fsg_lun_close(curlun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | up_write(&fsg->filesem); |
| 1852 | down_read(&fsg->filesem); |
| 1853 | } |
| 1854 | } else { |
| 1855 | |
| 1856 | /* Our emulation doesn't support mounting; the medium is |
| 1857 | * available for use as soon as it is loaded. */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1858 | if (!fsg_lun_is_open(curlun)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | curlun->sense_data = SS_MEDIUM_NOT_PRESENT; |
| 1860 | return -EINVAL; |
| 1861 | } |
| 1862 | } |
| 1863 | #endif |
| 1864 | return 0; |
| 1865 | } |
| 1866 | |
| 1867 | |
| 1868 | static int do_prevent_allow(struct fsg_dev *fsg) |
| 1869 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1870 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | int prevent; |
| 1872 | |
| 1873 | if (!mod_data.removable) { |
| 1874 | curlun->sense_data = SS_INVALID_COMMAND; |
| 1875 | return -EINVAL; |
| 1876 | } |
| 1877 | |
| 1878 | prevent = fsg->cmnd[4] & 0x01; |
| 1879 | if ((fsg->cmnd[4] & ~0x01) != 0) { // Mask away Prevent |
| 1880 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 1881 | return -EINVAL; |
| 1882 | } |
| 1883 | |
| 1884 | if (curlun->prevent_medium_removal && !prevent) |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1885 | fsg_lun_fsync_sub(curlun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | curlun->prevent_medium_removal = prevent; |
| 1887 | return 0; |
| 1888 | } |
| 1889 | |
| 1890 | |
| 1891 | static int do_read_format_capacities(struct fsg_dev *fsg, |
| 1892 | struct fsg_buffhd *bh) |
| 1893 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1894 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | u8 *buf = (u8 *) bh->buf; |
| 1896 | |
| 1897 | buf[0] = buf[1] = buf[2] = 0; |
| 1898 | buf[3] = 8; // Only the Current/Maximum Capacity Descriptor |
| 1899 | buf += 4; |
| 1900 | |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1901 | put_unaligned_be32(curlun->num_sectors, &buf[0]); |
| 1902 | /* Number of blocks */ |
Peiyu Li | 3f565a3 | 2011-08-17 22:52:59 -0700 | [diff] [blame] | 1903 | put_unaligned_be32(curlun->blksize, &buf[4]); /* Block length */ |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 1904 | buf[4] = 0x02; /* Current capacity */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | return 12; |
| 1906 | } |
| 1907 | |
| 1908 | |
| 1909 | static int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 1910 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 1911 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | |
| 1913 | /* We don't support MODE SELECT */ |
| 1914 | curlun->sense_data = SS_INVALID_COMMAND; |
| 1915 | return -EINVAL; |
| 1916 | } |
| 1917 | |
| 1918 | |
| 1919 | /*-------------------------------------------------------------------------*/ |
| 1920 | |
| 1921 | static int halt_bulk_in_endpoint(struct fsg_dev *fsg) |
| 1922 | { |
| 1923 | int rc; |
| 1924 | |
| 1925 | rc = fsg_set_halt(fsg, fsg->bulk_in); |
| 1926 | if (rc == -EAGAIN) |
| 1927 | VDBG(fsg, "delayed bulk-in endpoint halt\n"); |
| 1928 | while (rc != 0) { |
| 1929 | if (rc != -EAGAIN) { |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 1930 | WARNING(fsg, "usb_ep_set_halt -> %d\n", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | rc = 0; |
| 1932 | break; |
| 1933 | } |
| 1934 | |
| 1935 | /* Wait for a short time and then try again */ |
| 1936 | if (msleep_interruptible(100) != 0) |
| 1937 | return -EINTR; |
| 1938 | rc = usb_ep_set_halt(fsg->bulk_in); |
| 1939 | } |
| 1940 | return rc; |
| 1941 | } |
| 1942 | |
David Lopo | 62fd2ca | 2008-04-29 10:14:38 +0100 | [diff] [blame] | 1943 | static int wedge_bulk_in_endpoint(struct fsg_dev *fsg) |
| 1944 | { |
| 1945 | int rc; |
| 1946 | |
| 1947 | DBG(fsg, "bulk-in set wedge\n"); |
| 1948 | rc = usb_ep_set_wedge(fsg->bulk_in); |
| 1949 | if (rc == -EAGAIN) |
| 1950 | VDBG(fsg, "delayed bulk-in endpoint wedge\n"); |
| 1951 | while (rc != 0) { |
| 1952 | if (rc != -EAGAIN) { |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 1953 | WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc); |
David Lopo | 62fd2ca | 2008-04-29 10:14:38 +0100 | [diff] [blame] | 1954 | rc = 0; |
| 1955 | break; |
| 1956 | } |
| 1957 | |
| 1958 | /* Wait for a short time and then try again */ |
| 1959 | if (msleep_interruptible(100) != 0) |
| 1960 | return -EINTR; |
| 1961 | rc = usb_ep_set_wedge(fsg->bulk_in); |
| 1962 | } |
| 1963 | return rc; |
| 1964 | } |
| 1965 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | static int throw_away_data(struct fsg_dev *fsg) |
| 1967 | { |
| 1968 | struct fsg_buffhd *bh; |
| 1969 | u32 amount; |
| 1970 | int rc; |
| 1971 | |
| 1972 | while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY || |
| 1973 | fsg->usb_amount_left > 0) { |
| 1974 | |
| 1975 | /* Throw away the data in a filled buffer */ |
| 1976 | if (bh->state == BUF_STATE_FULL) { |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 1977 | smp_rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | bh->state = BUF_STATE_EMPTY; |
| 1979 | fsg->next_buffhd_to_drain = bh->next; |
| 1980 | |
| 1981 | /* A short packet or an error ends everything */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 1982 | if (bh->outreq->actual < bh->bulk_out_intended_length || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | bh->outreq->status != 0) { |
| 1984 | raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); |
| 1985 | return -EINTR; |
| 1986 | } |
| 1987 | continue; |
| 1988 | } |
| 1989 | |
| 1990 | /* Try to submit another request if we need one */ |
| 1991 | bh = fsg->next_buffhd_to_fill; |
| 1992 | if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) { |
| 1993 | amount = min(fsg->usb_amount_left, |
| 1994 | (u32) mod_data.buflen); |
| 1995 | |
Alan Stern | 04eee25 | 2011-08-18 14:29:00 -0400 | [diff] [blame] | 1996 | /* Except at the end of the transfer, amount will be |
| 1997 | * equal to the buffer size, which is divisible by |
| 1998 | * the bulk-out maxpacket size. |
| 1999 | */ |
Paul Zimmerman | fe69676 | 2011-09-30 15:26:06 -0700 | [diff] [blame] | 2000 | set_bulk_out_req_length(fsg, bh, amount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2001 | start_transfer(fsg, fsg->bulk_out, bh->outreq, |
| 2002 | &bh->outreq_busy, &bh->state); |
| 2003 | fsg->next_buffhd_to_fill = bh->next; |
| 2004 | fsg->usb_amount_left -= amount; |
| 2005 | continue; |
| 2006 | } |
| 2007 | |
| 2008 | /* Otherwise wait for something to happen */ |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2009 | rc = sleep_thread(fsg); |
| 2010 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | return rc; |
| 2012 | } |
| 2013 | return 0; |
| 2014 | } |
| 2015 | |
| 2016 | |
| 2017 | static int finish_reply(struct fsg_dev *fsg) |
| 2018 | { |
| 2019 | struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; |
| 2020 | int rc = 0; |
| 2021 | |
| 2022 | switch (fsg->data_dir) { |
| 2023 | case DATA_DIR_NONE: |
| 2024 | break; // Nothing to send |
| 2025 | |
| 2026 | /* If we don't know whether the host wants to read or write, |
| 2027 | * this must be CB or CBI with an unknown command. We mustn't |
| 2028 | * try to send or receive any data. So stall both bulk pipes |
| 2029 | * if we can and wait for a reset. */ |
| 2030 | case DATA_DIR_UNKNOWN: |
| 2031 | if (mod_data.can_stall) { |
| 2032 | fsg_set_halt(fsg, fsg->bulk_out); |
| 2033 | rc = halt_bulk_in_endpoint(fsg); |
| 2034 | } |
| 2035 | break; |
| 2036 | |
| 2037 | /* All but the last buffer of data must have already been sent */ |
| 2038 | case DATA_DIR_TO_HOST: |
| 2039 | if (fsg->data_size == 0) |
| 2040 | ; // Nothing to send |
| 2041 | |
| 2042 | /* If there's no residue, simply send the last buffer */ |
| 2043 | else if (fsg->residue == 0) { |
| 2044 | bh->inreq->zero = 0; |
| 2045 | start_transfer(fsg, fsg->bulk_in, bh->inreq, |
| 2046 | &bh->inreq_busy, &bh->state); |
| 2047 | fsg->next_buffhd_to_fill = bh->next; |
| 2048 | } |
| 2049 | |
| 2050 | /* There is a residue. For CB and CBI, simply mark the end |
| 2051 | * of the data with a short packet. However, if we are |
| 2052 | * allowed to stall, there was no data at all (residue == |
| 2053 | * data_size), and the command failed (invalid LUN or |
| 2054 | * sense data is set), then halt the bulk-in endpoint |
| 2055 | * instead. */ |
| 2056 | else if (!transport_is_bbb()) { |
| 2057 | if (mod_data.can_stall && |
| 2058 | fsg->residue == fsg->data_size && |
| 2059 | (!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) { |
| 2060 | bh->state = BUF_STATE_EMPTY; |
| 2061 | rc = halt_bulk_in_endpoint(fsg); |
| 2062 | } else { |
| 2063 | bh->inreq->zero = 1; |
| 2064 | start_transfer(fsg, fsg->bulk_in, bh->inreq, |
| 2065 | &bh->inreq_busy, &bh->state); |
| 2066 | fsg->next_buffhd_to_fill = bh->next; |
| 2067 | } |
| 2068 | } |
| 2069 | |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 2070 | /* |
| 2071 | * For Bulk-only, mark the end of the data with a short |
| 2072 | * packet. If we are allowed to stall, halt the bulk-in |
| 2073 | * endpoint. (Note: This violates the Bulk-Only Transport |
| 2074 | * specification, which requires us to pad the data if we |
| 2075 | * don't halt the endpoint. Presumably nobody will mind.) |
| 2076 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2077 | else { |
Alan Stern | ee81b3e | 2011-03-25 11:46:27 -0400 | [diff] [blame] | 2078 | bh->inreq->zero = 1; |
| 2079 | start_transfer(fsg, fsg->bulk_in, bh->inreq, |
| 2080 | &bh->inreq_busy, &bh->state); |
| 2081 | fsg->next_buffhd_to_fill = bh->next; |
| 2082 | if (mod_data.can_stall) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | rc = halt_bulk_in_endpoint(fsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | } |
| 2085 | break; |
| 2086 | |
| 2087 | /* We have processed all we want from the data the host has sent. |
| 2088 | * There may still be outstanding bulk-out requests. */ |
| 2089 | case DATA_DIR_FROM_HOST: |
| 2090 | if (fsg->residue == 0) |
| 2091 | ; // Nothing to receive |
| 2092 | |
| 2093 | /* Did the host stop sending unexpectedly early? */ |
| 2094 | else if (fsg->short_packet_received) { |
| 2095 | raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); |
| 2096 | rc = -EINTR; |
| 2097 | } |
| 2098 | |
| 2099 | /* We haven't processed all the incoming data. Even though |
| 2100 | * we may be allowed to stall, doing so would cause a race. |
| 2101 | * The controller may already have ACK'ed all the remaining |
| 2102 | * bulk-out packets, in which case the host wouldn't see a |
| 2103 | * STALL. Not realizing the endpoint was halted, it wouldn't |
| 2104 | * clear the halt -- leading to problems later on. */ |
| 2105 | #if 0 |
| 2106 | else if (mod_data.can_stall) { |
| 2107 | fsg_set_halt(fsg, fsg->bulk_out); |
| 2108 | raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); |
| 2109 | rc = -EINTR; |
| 2110 | } |
| 2111 | #endif |
| 2112 | |
| 2113 | /* We can't stall. Read in the excess data and throw it |
| 2114 | * all away. */ |
| 2115 | else |
| 2116 | rc = throw_away_data(fsg); |
| 2117 | break; |
| 2118 | } |
| 2119 | return rc; |
| 2120 | } |
| 2121 | |
| 2122 | |
| 2123 | static int send_status(struct fsg_dev *fsg) |
| 2124 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2125 | struct fsg_lun *curlun = fsg->curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | struct fsg_buffhd *bh; |
| 2127 | int rc; |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2128 | u8 status = US_BULK_STAT_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | u32 sd, sdinfo = 0; |
| 2130 | |
| 2131 | /* Wait for the next buffer to become available */ |
| 2132 | bh = fsg->next_buffhd_to_fill; |
| 2133 | while (bh->state != BUF_STATE_EMPTY) { |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2134 | rc = sleep_thread(fsg); |
| 2135 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | return rc; |
| 2137 | } |
| 2138 | |
| 2139 | if (curlun) { |
| 2140 | sd = curlun->sense_data; |
| 2141 | sdinfo = curlun->sense_data_info; |
| 2142 | } else if (fsg->bad_lun_okay) |
| 2143 | sd = SS_NO_SENSE; |
| 2144 | else |
| 2145 | sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; |
| 2146 | |
| 2147 | if (fsg->phase_error) { |
| 2148 | DBG(fsg, "sending phase-error status\n"); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2149 | status = US_BULK_STAT_PHASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | sd = SS_INVALID_COMMAND; |
| 2151 | } else if (sd != SS_NO_SENSE) { |
| 2152 | DBG(fsg, "sending command-failure status\n"); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2153 | status = US_BULK_STAT_FAIL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | VDBG(fsg, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;" |
| 2155 | " info x%x\n", |
| 2156 | SK(sd), ASC(sd), ASCQ(sd), sdinfo); |
| 2157 | } |
| 2158 | |
| 2159 | if (transport_is_bbb()) { |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 2160 | struct bulk_cs_wrap *csw = bh->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | |
| 2162 | /* Store and send the Bulk-only CSW */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2163 | csw->Signature = cpu_to_le32(US_BULK_CS_SIGN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | csw->Tag = fsg->tag; |
| 2165 | csw->Residue = cpu_to_le32(fsg->residue); |
| 2166 | csw->Status = status; |
| 2167 | |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2168 | bh->inreq->length = US_BULK_CS_WRAP_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | bh->inreq->zero = 0; |
| 2170 | start_transfer(fsg, fsg->bulk_in, bh->inreq, |
| 2171 | &bh->inreq_busy, &bh->state); |
| 2172 | |
| 2173 | } else if (mod_data.transport_type == USB_PR_CB) { |
| 2174 | |
| 2175 | /* Control-Bulk transport has no status phase! */ |
| 2176 | return 0; |
| 2177 | |
| 2178 | } else { // USB_PR_CBI |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 2179 | struct interrupt_data *buf = bh->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | |
| 2181 | /* Store and send the Interrupt data. UFI sends the ASC |
| 2182 | * and ASCQ bytes. Everything else sends a Type (which |
| 2183 | * is always 0) and the status Value. */ |
| 2184 | if (mod_data.protocol_type == USB_SC_UFI) { |
| 2185 | buf->bType = ASC(sd); |
| 2186 | buf->bValue = ASCQ(sd); |
| 2187 | } else { |
| 2188 | buf->bType = 0; |
| 2189 | buf->bValue = status; |
| 2190 | } |
| 2191 | fsg->intreq->length = CBI_INTERRUPT_DATA_LEN; |
| 2192 | |
| 2193 | fsg->intr_buffhd = bh; // Point to the right buffhd |
| 2194 | fsg->intreq->buf = bh->inreq->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | fsg->intreq->context = bh; |
| 2196 | start_transfer(fsg, fsg->intr_in, fsg->intreq, |
| 2197 | &fsg->intreq_busy, &bh->state); |
| 2198 | } |
| 2199 | |
| 2200 | fsg->next_buffhd_to_fill = bh->next; |
| 2201 | return 0; |
| 2202 | } |
| 2203 | |
| 2204 | |
| 2205 | /*-------------------------------------------------------------------------*/ |
| 2206 | |
| 2207 | /* Check whether the command is properly formed and whether its data size |
| 2208 | * and direction agree with the values we already have. */ |
| 2209 | static int check_command(struct fsg_dev *fsg, int cmnd_size, |
| 2210 | enum data_direction data_dir, unsigned int mask, |
| 2211 | int needs_medium, const char *name) |
| 2212 | { |
| 2213 | int i; |
| 2214 | int lun = fsg->cmnd[1] >> 5; |
| 2215 | static const char dirletter[4] = {'u', 'o', 'i', 'n'}; |
| 2216 | char hdlen[20]; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2217 | struct fsg_lun *curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | |
| 2219 | /* Adjust the expected cmnd_size for protocol encapsulation padding. |
| 2220 | * Transparent SCSI doesn't pad. */ |
| 2221 | if (protocol_is_scsi()) |
| 2222 | ; |
| 2223 | |
| 2224 | /* There's some disagreement as to whether RBC pads commands or not. |
| 2225 | * We'll play it safe and accept either form. */ |
| 2226 | else if (mod_data.protocol_type == USB_SC_RBC) { |
| 2227 | if (fsg->cmnd_size == 12) |
| 2228 | cmnd_size = 12; |
| 2229 | |
| 2230 | /* All the other protocols pad to 12 bytes */ |
| 2231 | } else |
| 2232 | cmnd_size = 12; |
| 2233 | |
| 2234 | hdlen[0] = 0; |
| 2235 | if (fsg->data_dir != DATA_DIR_UNKNOWN) |
| 2236 | sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir], |
| 2237 | fsg->data_size); |
| 2238 | VDBG(fsg, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n", |
| 2239 | name, cmnd_size, dirletter[(int) data_dir], |
| 2240 | fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen); |
| 2241 | |
| 2242 | /* We can't reply at all until we know the correct data direction |
| 2243 | * and size. */ |
| 2244 | if (fsg->data_size_from_cmnd == 0) |
| 2245 | data_dir = DATA_DIR_NONE; |
| 2246 | if (fsg->data_dir == DATA_DIR_UNKNOWN) { // CB or CBI |
| 2247 | fsg->data_dir = data_dir; |
| 2248 | fsg->data_size = fsg->data_size_from_cmnd; |
| 2249 | |
| 2250 | } else { // Bulk-only |
| 2251 | if (fsg->data_size < fsg->data_size_from_cmnd) { |
| 2252 | |
| 2253 | /* Host data size < Device data size is a phase error. |
| 2254 | * Carry out the command, but only transfer as much |
| 2255 | * as we are allowed. */ |
| 2256 | fsg->data_size_from_cmnd = fsg->data_size; |
| 2257 | fsg->phase_error = 1; |
| 2258 | } |
| 2259 | } |
| 2260 | fsg->residue = fsg->usb_amount_left = fsg->data_size; |
| 2261 | |
| 2262 | /* Conflicting data directions is a phase error */ |
| 2263 | if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) { |
| 2264 | fsg->phase_error = 1; |
| 2265 | return -EINVAL; |
| 2266 | } |
| 2267 | |
| 2268 | /* Verify the length of the command itself */ |
| 2269 | if (cmnd_size != fsg->cmnd_size) { |
| 2270 | |
Felipe Balbi | 549c41e | 2008-09-19 02:00:02 +0300 | [diff] [blame] | 2271 | /* Special case workaround: There are plenty of buggy SCSI |
| 2272 | * implementations. Many have issues with cbw->Length |
| 2273 | * field passing a wrong command size. For those cases we |
| 2274 | * always try to work around the problem by using the length |
| 2275 | * sent by the host side provided it is at least as large |
| 2276 | * as the correct command length. |
| 2277 | * Examples of such cases would be MS-Windows, which issues |
| 2278 | * REQUEST SENSE with cbw->Length == 12 where it should |
| 2279 | * be 6, and xbox360 issuing INQUIRY, TEST UNIT READY and |
| 2280 | * REQUEST SENSE with cbw->Length == 10 where it should |
| 2281 | * be 6 as well. |
| 2282 | */ |
| 2283 | if (cmnd_size <= fsg->cmnd_size) { |
| 2284 | DBG(fsg, "%s is buggy! Expected length %d " |
| 2285 | "but we got %d\n", name, |
| 2286 | cmnd_size, fsg->cmnd_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | cmnd_size = fsg->cmnd_size; |
Felipe Balbi | 549c41e | 2008-09-19 02:00:02 +0300 | [diff] [blame] | 2288 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | fsg->phase_error = 1; |
| 2290 | return -EINVAL; |
| 2291 | } |
| 2292 | } |
| 2293 | |
Alan Stern | d794ac7 | 2005-04-18 12:43:25 -0400 | [diff] [blame] | 2294 | /* Check that the LUN values are consistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | if (transport_is_bbb()) { |
| 2296 | if (fsg->lun != lun) |
| 2297 | DBG(fsg, "using LUN %d from CBW, " |
| 2298 | "not LUN %d from CDB\n", |
| 2299 | fsg->lun, lun); |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2300 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | |
| 2302 | /* Check the LUN */ |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2303 | curlun = fsg->curlun; |
| 2304 | if (curlun) { |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2305 | if (fsg->cmnd[0] != REQUEST_SENSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | curlun->sense_data = SS_NO_SENSE; |
| 2307 | curlun->sense_data_info = 0; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 2308 | curlun->info_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | } |
| 2310 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | fsg->bad_lun_okay = 0; |
| 2312 | |
| 2313 | /* INQUIRY and REQUEST SENSE commands are explicitly allowed |
| 2314 | * to use unsupported LUNs; all others may not. */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2315 | if (fsg->cmnd[0] != INQUIRY && |
| 2316 | fsg->cmnd[0] != REQUEST_SENSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | DBG(fsg, "unsupported LUN %d\n", fsg->lun); |
| 2318 | return -EINVAL; |
| 2319 | } |
| 2320 | } |
| 2321 | |
| 2322 | /* If a unit attention condition exists, only INQUIRY and |
| 2323 | * REQUEST SENSE commands are allowed; anything else must fail. */ |
| 2324 | if (curlun && curlun->unit_attention_data != SS_NO_SENSE && |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2325 | fsg->cmnd[0] != INQUIRY && |
| 2326 | fsg->cmnd[0] != REQUEST_SENSE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | curlun->sense_data = curlun->unit_attention_data; |
| 2328 | curlun->unit_attention_data = SS_NO_SENSE; |
| 2329 | return -EINVAL; |
| 2330 | } |
| 2331 | |
| 2332 | /* Check that only command bytes listed in the mask are non-zero */ |
| 2333 | fsg->cmnd[1] &= 0x1f; // Mask away the LUN |
| 2334 | for (i = 1; i < cmnd_size; ++i) { |
| 2335 | if (fsg->cmnd[i] && !(mask & (1 << i))) { |
| 2336 | if (curlun) |
| 2337 | curlun->sense_data = SS_INVALID_FIELD_IN_CDB; |
| 2338 | return -EINVAL; |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | /* If the medium isn't mounted and the command needs to access |
| 2343 | * it, return an error. */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2344 | if (curlun && !fsg_lun_is_open(curlun) && needs_medium) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | curlun->sense_data = SS_MEDIUM_NOT_PRESENT; |
| 2346 | return -EINVAL; |
| 2347 | } |
| 2348 | |
| 2349 | return 0; |
| 2350 | } |
| 2351 | |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2352 | /* wrapper of check_command for data size in blocks handling */ |
| 2353 | static int check_command_size_in_blocks(struct fsg_dev *fsg, int cmnd_size, |
| 2354 | enum data_direction data_dir, unsigned int mask, |
| 2355 | int needs_medium, const char *name) |
| 2356 | { |
| 2357 | if (fsg->curlun) |
| 2358 | fsg->data_size_from_cmnd <<= fsg->curlun->blkbits; |
| 2359 | return check_command(fsg, cmnd_size, data_dir, |
| 2360 | mask, needs_medium, name); |
| 2361 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | |
| 2363 | static int do_scsi_command(struct fsg_dev *fsg) |
| 2364 | { |
| 2365 | struct fsg_buffhd *bh; |
| 2366 | int rc; |
| 2367 | int reply = -EINVAL; |
| 2368 | int i; |
| 2369 | static char unknown[16]; |
| 2370 | |
| 2371 | dump_cdb(fsg); |
| 2372 | |
| 2373 | /* Wait for the next buffer to become available for data or status */ |
| 2374 | bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill; |
| 2375 | while (bh->state != BUF_STATE_EMPTY) { |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2376 | rc = sleep_thread(fsg); |
| 2377 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | return rc; |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | fsg->phase_error = 0; |
| 2381 | fsg->short_packet_received = 0; |
| 2382 | |
| 2383 | down_read(&fsg->filesem); // We're using the backing file |
| 2384 | switch (fsg->cmnd[0]) { |
| 2385 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2386 | case INQUIRY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | fsg->data_size_from_cmnd = fsg->cmnd[4]; |
| 2388 | if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, |
| 2389 | (1<<4), 0, |
| 2390 | "INQUIRY")) == 0) |
| 2391 | reply = do_inquiry(fsg, bh); |
| 2392 | break; |
| 2393 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2394 | case MODE_SELECT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | fsg->data_size_from_cmnd = fsg->cmnd[4]; |
| 2396 | if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST, |
| 2397 | (1<<1) | (1<<4), 0, |
| 2398 | "MODE SELECT(6)")) == 0) |
| 2399 | reply = do_mode_select(fsg, bh); |
| 2400 | break; |
| 2401 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2402 | case MODE_SELECT_10: |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 2403 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST, |
| 2405 | (1<<1) | (3<<7), 0, |
| 2406 | "MODE SELECT(10)")) == 0) |
| 2407 | reply = do_mode_select(fsg, bh); |
| 2408 | break; |
| 2409 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2410 | case MODE_SENSE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | fsg->data_size_from_cmnd = fsg->cmnd[4]; |
| 2412 | if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, |
| 2413 | (1<<1) | (1<<2) | (1<<4), 0, |
| 2414 | "MODE SENSE(6)")) == 0) |
| 2415 | reply = do_mode_sense(fsg, bh); |
| 2416 | break; |
| 2417 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2418 | case MODE_SENSE_10: |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 2419 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, |
| 2421 | (1<<1) | (1<<2) | (3<<7), 0, |
| 2422 | "MODE SENSE(10)")) == 0) |
| 2423 | reply = do_mode_sense(fsg, bh); |
| 2424 | break; |
| 2425 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2426 | case ALLOW_MEDIUM_REMOVAL: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | fsg->data_size_from_cmnd = 0; |
| 2428 | if ((reply = check_command(fsg, 6, DATA_DIR_NONE, |
| 2429 | (1<<4), 0, |
| 2430 | "PREVENT-ALLOW MEDIUM REMOVAL")) == 0) |
| 2431 | reply = do_prevent_allow(fsg); |
| 2432 | break; |
| 2433 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2434 | case READ_6: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | i = fsg->cmnd[4]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2436 | fsg->data_size_from_cmnd = (i == 0) ? 256 : i; |
| 2437 | if ((reply = check_command_size_in_blocks(fsg, 6, |
| 2438 | DATA_DIR_TO_HOST, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | (7<<1) | (1<<4), 1, |
| 2440 | "READ(6)")) == 0) |
| 2441 | reply = do_read(fsg); |
| 2442 | break; |
| 2443 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2444 | case READ_10: |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2445 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
| 2446 | if ((reply = check_command_size_in_blocks(fsg, 10, |
| 2447 | DATA_DIR_TO_HOST, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2449 | "READ(10)")) == 0) |
| 2450 | reply = do_read(fsg); |
| 2451 | break; |
| 2452 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2453 | case READ_12: |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2454 | fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]); |
| 2455 | if ((reply = check_command_size_in_blocks(fsg, 12, |
| 2456 | DATA_DIR_TO_HOST, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | (1<<1) | (0xf<<2) | (0xf<<6), 1, |
| 2458 | "READ(12)")) == 0) |
| 2459 | reply = do_read(fsg); |
| 2460 | break; |
| 2461 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2462 | case READ_CAPACITY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | fsg->data_size_from_cmnd = 8; |
| 2464 | if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, |
| 2465 | (0xf<<2) | (1<<8), 1, |
| 2466 | "READ CAPACITY")) == 0) |
| 2467 | reply = do_read_capacity(fsg, bh); |
| 2468 | break; |
| 2469 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2470 | case READ_HEADER: |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 2471 | if (!mod_data.cdrom) |
| 2472 | goto unknown_cmnd; |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 2473 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 2474 | if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, |
| 2475 | (3<<7) | (0x1f<<1), 1, |
| 2476 | "READ HEADER")) == 0) |
| 2477 | reply = do_read_header(fsg, bh); |
| 2478 | break; |
| 2479 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2480 | case READ_TOC: |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 2481 | if (!mod_data.cdrom) |
| 2482 | goto unknown_cmnd; |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 2483 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 2484 | if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, |
| 2485 | (7<<6) | (1<<1), 1, |
| 2486 | "READ TOC")) == 0) |
| 2487 | reply = do_read_toc(fsg, bh); |
| 2488 | break; |
| 2489 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2490 | case READ_FORMAT_CAPACITIES: |
Alan Stern | 604eb89 | 2009-04-27 13:19:41 -0400 | [diff] [blame] | 2491 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, |
| 2493 | (3<<7), 1, |
| 2494 | "READ FORMAT CAPACITIES")) == 0) |
| 2495 | reply = do_read_format_capacities(fsg, bh); |
| 2496 | break; |
| 2497 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2498 | case REQUEST_SENSE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | fsg->data_size_from_cmnd = fsg->cmnd[4]; |
| 2500 | if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, |
| 2501 | (1<<4), 0, |
| 2502 | "REQUEST SENSE")) == 0) |
| 2503 | reply = do_request_sense(fsg, bh); |
| 2504 | break; |
| 2505 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2506 | case START_STOP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | fsg->data_size_from_cmnd = 0; |
| 2508 | if ((reply = check_command(fsg, 6, DATA_DIR_NONE, |
| 2509 | (1<<1) | (1<<4), 0, |
| 2510 | "START-STOP UNIT")) == 0) |
| 2511 | reply = do_start_stop(fsg); |
| 2512 | break; |
| 2513 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2514 | case SYNCHRONIZE_CACHE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | fsg->data_size_from_cmnd = 0; |
| 2516 | if ((reply = check_command(fsg, 10, DATA_DIR_NONE, |
| 2517 | (0xf<<2) | (3<<7), 1, |
| 2518 | "SYNCHRONIZE CACHE")) == 0) |
| 2519 | reply = do_synchronize_cache(fsg); |
| 2520 | break; |
| 2521 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2522 | case TEST_UNIT_READY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | fsg->data_size_from_cmnd = 0; |
| 2524 | reply = check_command(fsg, 6, DATA_DIR_NONE, |
| 2525 | 0, 1, |
| 2526 | "TEST UNIT READY"); |
| 2527 | break; |
| 2528 | |
| 2529 | /* Although optional, this command is used by MS-Windows. We |
| 2530 | * support a minimal version: BytChk must be 0. */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2531 | case VERIFY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | fsg->data_size_from_cmnd = 0; |
| 2533 | if ((reply = check_command(fsg, 10, DATA_DIR_NONE, |
| 2534 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2535 | "VERIFY")) == 0) |
| 2536 | reply = do_verify(fsg); |
| 2537 | break; |
| 2538 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2539 | case WRITE_6: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | i = fsg->cmnd[4]; |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2541 | fsg->data_size_from_cmnd = (i == 0) ? 256 : i; |
| 2542 | if ((reply = check_command_size_in_blocks(fsg, 6, |
| 2543 | DATA_DIR_FROM_HOST, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | (7<<1) | (1<<4), 1, |
| 2545 | "WRITE(6)")) == 0) |
| 2546 | reply = do_write(fsg); |
| 2547 | break; |
| 2548 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2549 | case WRITE_10: |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2550 | fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]); |
| 2551 | if ((reply = check_command_size_in_blocks(fsg, 10, |
| 2552 | DATA_DIR_FROM_HOST, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | (1<<1) | (0xf<<2) | (3<<7), 1, |
| 2554 | "WRITE(10)")) == 0) |
| 2555 | reply = do_write(fsg); |
| 2556 | break; |
| 2557 | |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2558 | case WRITE_12: |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2559 | fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]); |
| 2560 | if ((reply = check_command_size_in_blocks(fsg, 12, |
| 2561 | DATA_DIR_FROM_HOST, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | (1<<1) | (0xf<<2) | (0xf<<6), 1, |
| 2563 | "WRITE(12)")) == 0) |
| 2564 | reply = do_write(fsg); |
| 2565 | break; |
| 2566 | |
| 2567 | /* Some mandatory commands that we recognize but don't implement. |
| 2568 | * They don't mean much in this setting. It's left as an exercise |
| 2569 | * for anyone interested to implement RESERVE and RELEASE in terms |
| 2570 | * of Posix locks. */ |
Michal Nazarewicz | 0a6a717 | 2010-10-07 14:46:15 +0200 | [diff] [blame] | 2571 | case FORMAT_UNIT: |
| 2572 | case RELEASE: |
| 2573 | case RESERVE: |
| 2574 | case SEND_DIAGNOSTIC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | // Fall through |
| 2576 | |
| 2577 | default: |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 2578 | unknown_cmnd: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | fsg->data_size_from_cmnd = 0; |
| 2580 | sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]); |
| 2581 | if ((reply = check_command(fsg, fsg->cmnd_size, |
| 2582 | DATA_DIR_UNKNOWN, 0xff, 0, unknown)) == 0) { |
| 2583 | fsg->curlun->sense_data = SS_INVALID_COMMAND; |
| 2584 | reply = -EINVAL; |
| 2585 | } |
| 2586 | break; |
| 2587 | } |
| 2588 | up_read(&fsg->filesem); |
| 2589 | |
| 2590 | if (reply == -EINTR || signal_pending(current)) |
| 2591 | return -EINTR; |
| 2592 | |
| 2593 | /* Set up the single reply buffer for finish_reply() */ |
| 2594 | if (reply == -EINVAL) |
| 2595 | reply = 0; // Error reply length |
| 2596 | if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) { |
| 2597 | reply = min((u32) reply, fsg->data_size_from_cmnd); |
| 2598 | bh->inreq->length = reply; |
| 2599 | bh->state = BUF_STATE_FULL; |
| 2600 | fsg->residue -= reply; |
| 2601 | } // Otherwise it's already set |
| 2602 | |
| 2603 | return 0; |
| 2604 | } |
| 2605 | |
| 2606 | |
| 2607 | /*-------------------------------------------------------------------------*/ |
| 2608 | |
| 2609 | static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh) |
| 2610 | { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2611 | struct usb_request *req = bh->outreq; |
Sebastian Andrzej Siewior | 7ac4704 | 2012-02-25 18:28:09 +0100 | [diff] [blame] | 2612 | struct bulk_cb_wrap *cbw = req->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | |
Alan Stern | b950bdb | 2008-04-14 11:45:29 -0400 | [diff] [blame] | 2614 | /* Was this a real packet? Should it be ignored? */ |
| 2615 | if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2616 | return -EINVAL; |
| 2617 | |
| 2618 | /* Is the CBW valid? */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2619 | if (req->actual != US_BULK_CB_WRAP_LEN || |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 2620 | cbw->Signature != cpu_to_le32( |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2621 | US_BULK_CB_SIGN)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | DBG(fsg, "invalid CBW: len %u sig 0x%x\n", |
| 2623 | req->actual, |
| 2624 | le32_to_cpu(cbw->Signature)); |
| 2625 | |
Alan Stern | b950bdb | 2008-04-14 11:45:29 -0400 | [diff] [blame] | 2626 | /* The Bulk-only spec says we MUST stall the IN endpoint |
| 2627 | * (6.6.1), so it's unavoidable. It also says we must |
| 2628 | * retain this state until the next reset, but there's |
| 2629 | * no way to tell the controller driver it should ignore |
| 2630 | * Clear-Feature(HALT) requests. |
| 2631 | * |
| 2632 | * We aren't required to halt the OUT endpoint; instead |
| 2633 | * we can simply accept and discard any data received |
| 2634 | * until the next reset. */ |
David Lopo | 62fd2ca | 2008-04-29 10:14:38 +0100 | [diff] [blame] | 2635 | wedge_bulk_in_endpoint(fsg); |
Alan Stern | b950bdb | 2008-04-14 11:45:29 -0400 | [diff] [blame] | 2636 | set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2637 | return -EINVAL; |
| 2638 | } |
| 2639 | |
| 2640 | /* Is the CBW meaningful? */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2641 | if (cbw->Lun >= FSG_MAX_LUNS || cbw->Flags & ~US_BULK_FLAG_IN || |
Alan Stern | 12943f0 | 2007-08-24 16:27:50 -0400 | [diff] [blame] | 2642 | cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2643 | DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, " |
| 2644 | "cmdlen %u\n", |
| 2645 | cbw->Lun, cbw->Flags, cbw->Length); |
| 2646 | |
| 2647 | /* We can do anything we want here, so let's stall the |
| 2648 | * bulk pipes if we are allowed to. */ |
| 2649 | if (mod_data.can_stall) { |
| 2650 | fsg_set_halt(fsg, fsg->bulk_out); |
| 2651 | halt_bulk_in_endpoint(fsg); |
| 2652 | } |
| 2653 | return -EINVAL; |
| 2654 | } |
| 2655 | |
| 2656 | /* Save the command for later */ |
| 2657 | fsg->cmnd_size = cbw->Length; |
| 2658 | memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size); |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2659 | if (cbw->Flags & US_BULK_FLAG_IN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | fsg->data_dir = DATA_DIR_TO_HOST; |
| 2661 | else |
| 2662 | fsg->data_dir = DATA_DIR_FROM_HOST; |
| 2663 | fsg->data_size = le32_to_cpu(cbw->DataTransferLength); |
| 2664 | if (fsg->data_size == 0) |
| 2665 | fsg->data_dir = DATA_DIR_NONE; |
| 2666 | fsg->lun = cbw->Lun; |
| 2667 | fsg->tag = cbw->Tag; |
| 2668 | return 0; |
| 2669 | } |
| 2670 | |
| 2671 | |
| 2672 | static int get_next_command(struct fsg_dev *fsg) |
| 2673 | { |
| 2674 | struct fsg_buffhd *bh; |
| 2675 | int rc = 0; |
| 2676 | |
| 2677 | if (transport_is_bbb()) { |
| 2678 | |
| 2679 | /* Wait for the next buffer to become available */ |
| 2680 | bh = fsg->next_buffhd_to_fill; |
| 2681 | while (bh->state != BUF_STATE_EMPTY) { |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2682 | rc = sleep_thread(fsg); |
| 2683 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | return rc; |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2685 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | |
| 2687 | /* Queue a request to read a Bulk-only CBW */ |
Sebastian Andrzej Siewior | 775dafd | 2012-02-25 18:28:11 +0100 | [diff] [blame] | 2688 | set_bulk_out_req_length(fsg, bh, US_BULK_CB_WRAP_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | start_transfer(fsg, fsg->bulk_out, bh->outreq, |
| 2690 | &bh->outreq_busy, &bh->state); |
| 2691 | |
| 2692 | /* We will drain the buffer in software, which means we |
| 2693 | * can reuse it for the next filling. No need to advance |
| 2694 | * next_buffhd_to_fill. */ |
| 2695 | |
| 2696 | /* Wait for the CBW to arrive */ |
| 2697 | while (bh->state != BUF_STATE_FULL) { |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2698 | rc = sleep_thread(fsg); |
| 2699 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | return rc; |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2701 | } |
Alan Stern | a21d4fe | 2005-11-29 12:04:24 -0500 | [diff] [blame] | 2702 | smp_rmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | rc = received_cbw(fsg, bh); |
| 2704 | bh->state = BUF_STATE_EMPTY; |
| 2705 | |
| 2706 | } else { // USB_PR_CB or USB_PR_CBI |
| 2707 | |
| 2708 | /* Wait for the next command to arrive */ |
| 2709 | while (fsg->cbbuf_cmnd_size == 0) { |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2710 | rc = sleep_thread(fsg); |
| 2711 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | return rc; |
Alan Stern | 79a7d9e | 2007-08-08 17:10:11 -0400 | [diff] [blame] | 2713 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2714 | |
| 2715 | /* Is the previous status interrupt request still busy? |
| 2716 | * The host is allowed to skip reading the status, |
| 2717 | * so we must cancel it. */ |
| 2718 | if (fsg->intreq_busy) |
| 2719 | usb_ep_dequeue(fsg->intr_in, fsg->intreq); |
| 2720 | |
| 2721 | /* Copy the command and mark the buffer empty */ |
| 2722 | fsg->data_dir = DATA_DIR_UNKNOWN; |
| 2723 | spin_lock_irq(&fsg->lock); |
| 2724 | fsg->cmnd_size = fsg->cbbuf_cmnd_size; |
| 2725 | memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size); |
| 2726 | fsg->cbbuf_cmnd_size = 0; |
| 2727 | spin_unlock_irq(&fsg->lock); |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2728 | |
| 2729 | /* Use LUN from the command */ |
| 2730 | fsg->lun = fsg->cmnd[1] >> 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | } |
Yuping Luo | 144974e | 2011-10-25 19:13:10 -0700 | [diff] [blame] | 2732 | |
| 2733 | /* Update current lun */ |
| 2734 | if (fsg->lun >= 0 && fsg->lun < fsg->nluns) |
| 2735 | fsg->curlun = &fsg->luns[fsg->lun]; |
| 2736 | else |
| 2737 | fsg->curlun = NULL; |
| 2738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | return rc; |
| 2740 | } |
| 2741 | |
| 2742 | |
| 2743 | /*-------------------------------------------------------------------------*/ |
| 2744 | |
| 2745 | static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep, |
| 2746 | const struct usb_endpoint_descriptor *d) |
| 2747 | { |
| 2748 | int rc; |
| 2749 | |
| 2750 | ep->driver_data = fsg; |
Tatyana Brokhman | 72c973d | 2011-06-28 16:33:48 +0300 | [diff] [blame] | 2751 | ep->desc = d; |
| 2752 | rc = usb_ep_enable(ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2753 | if (rc) |
| 2754 | ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc); |
| 2755 | return rc; |
| 2756 | } |
| 2757 | |
| 2758 | static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep, |
| 2759 | struct usb_request **preq) |
| 2760 | { |
| 2761 | *preq = usb_ep_alloc_request(ep, GFP_ATOMIC); |
| 2762 | if (*preq) |
| 2763 | return 0; |
| 2764 | ERROR(fsg, "can't allocate request for %s\n", ep->name); |
| 2765 | return -ENOMEM; |
| 2766 | } |
| 2767 | |
| 2768 | /* |
| 2769 | * Reset interface setting and re-init endpoint state (toggle etc). |
| 2770 | * Call with altsetting < 0 to disable the interface. The only other |
| 2771 | * available altsetting is 0, which enables the interface. |
| 2772 | */ |
| 2773 | static int do_set_interface(struct fsg_dev *fsg, int altsetting) |
| 2774 | { |
| 2775 | int rc = 0; |
| 2776 | int i; |
| 2777 | const struct usb_endpoint_descriptor *d; |
| 2778 | |
| 2779 | if (fsg->running) |
| 2780 | DBG(fsg, "reset interface\n"); |
| 2781 | |
| 2782 | reset: |
| 2783 | /* Deallocate the requests */ |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2784 | for (i = 0; i < fsg_num_buffers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | struct fsg_buffhd *bh = &fsg->buffhds[i]; |
| 2786 | |
| 2787 | if (bh->inreq) { |
| 2788 | usb_ep_free_request(fsg->bulk_in, bh->inreq); |
| 2789 | bh->inreq = NULL; |
| 2790 | } |
| 2791 | if (bh->outreq) { |
| 2792 | usb_ep_free_request(fsg->bulk_out, bh->outreq); |
| 2793 | bh->outreq = NULL; |
| 2794 | } |
| 2795 | } |
| 2796 | if (fsg->intreq) { |
| 2797 | usb_ep_free_request(fsg->intr_in, fsg->intreq); |
| 2798 | fsg->intreq = NULL; |
| 2799 | } |
| 2800 | |
| 2801 | /* Disable the endpoints */ |
| 2802 | if (fsg->bulk_in_enabled) { |
| 2803 | usb_ep_disable(fsg->bulk_in); |
| 2804 | fsg->bulk_in_enabled = 0; |
| 2805 | } |
| 2806 | if (fsg->bulk_out_enabled) { |
| 2807 | usb_ep_disable(fsg->bulk_out); |
| 2808 | fsg->bulk_out_enabled = 0; |
| 2809 | } |
| 2810 | if (fsg->intr_in_enabled) { |
| 2811 | usb_ep_disable(fsg->intr_in); |
| 2812 | fsg->intr_in_enabled = 0; |
| 2813 | } |
| 2814 | |
| 2815 | fsg->running = 0; |
| 2816 | if (altsetting < 0 || rc != 0) |
| 2817 | return rc; |
| 2818 | |
| 2819 | DBG(fsg, "set interface %d\n", altsetting); |
| 2820 | |
| 2821 | /* Enable the endpoints */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2822 | d = fsg_ep_desc(fsg->gadget, |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 2823 | &fsg_fs_bulk_in_desc, &fsg_hs_bulk_in_desc, |
| 2824 | &fsg_ss_bulk_in_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2825 | if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0) |
| 2826 | goto reset; |
| 2827 | fsg->bulk_in_enabled = 1; |
| 2828 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2829 | d = fsg_ep_desc(fsg->gadget, |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 2830 | &fsg_fs_bulk_out_desc, &fsg_hs_bulk_out_desc, |
| 2831 | &fsg_ss_bulk_out_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0) |
| 2833 | goto reset; |
| 2834 | fsg->bulk_out_enabled = 1; |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 2835 | fsg->bulk_out_maxpacket = usb_endpoint_maxp(d); |
Alan Stern | b950bdb | 2008-04-14 11:45:29 -0400 | [diff] [blame] | 2836 | clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | |
| 2838 | if (transport_is_cbi()) { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2839 | d = fsg_ep_desc(fsg->gadget, |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 2840 | &fsg_fs_intr_in_desc, &fsg_hs_intr_in_desc, |
| 2841 | &fsg_ss_intr_in_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2842 | if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0) |
| 2843 | goto reset; |
| 2844 | fsg->intr_in_enabled = 1; |
| 2845 | } |
| 2846 | |
| 2847 | /* Allocate the requests */ |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2848 | for (i = 0; i < fsg_num_buffers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2849 | struct fsg_buffhd *bh = &fsg->buffhds[i]; |
| 2850 | |
| 2851 | if ((rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq)) != 0) |
| 2852 | goto reset; |
| 2853 | if ((rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq)) != 0) |
| 2854 | goto reset; |
| 2855 | bh->inreq->buf = bh->outreq->buf = bh->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | bh->inreq->context = bh->outreq->context = bh; |
| 2857 | bh->inreq->complete = bulk_in_complete; |
| 2858 | bh->outreq->complete = bulk_out_complete; |
| 2859 | } |
| 2860 | if (transport_is_cbi()) { |
| 2861 | if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0) |
| 2862 | goto reset; |
| 2863 | fsg->intreq->complete = intr_in_complete; |
| 2864 | } |
| 2865 | |
| 2866 | fsg->running = 1; |
| 2867 | for (i = 0; i < fsg->nluns; ++i) |
| 2868 | fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED; |
| 2869 | return rc; |
| 2870 | } |
| 2871 | |
| 2872 | |
| 2873 | /* |
| 2874 | * Change our operational configuration. This code must agree with the code |
| 2875 | * that returns config descriptors, and with interface altsetting code. |
| 2876 | * |
| 2877 | * It's also responsible for power management interactions. Some |
| 2878 | * configurations might not work with our current power sources. |
| 2879 | * For now we just assume the gadget is always self-powered. |
| 2880 | */ |
| 2881 | static int do_set_config(struct fsg_dev *fsg, u8 new_config) |
| 2882 | { |
| 2883 | int rc = 0; |
| 2884 | |
| 2885 | /* Disable the single interface */ |
| 2886 | if (fsg->config != 0) { |
| 2887 | DBG(fsg, "reset config\n"); |
| 2888 | fsg->config = 0; |
| 2889 | rc = do_set_interface(fsg, -1); |
| 2890 | } |
| 2891 | |
| 2892 | /* Enable the interface */ |
| 2893 | if (new_config != 0) { |
| 2894 | fsg->config = new_config; |
| 2895 | if ((rc = do_set_interface(fsg, 0)) != 0) |
| 2896 | fsg->config = 0; // Reset on errors |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 2897 | else |
| 2898 | INFO(fsg, "%s config #%d\n", |
| 2899 | usb_speed_string(fsg->gadget->speed), |
| 2900 | fsg->config); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | } |
| 2902 | return rc; |
| 2903 | } |
| 2904 | |
| 2905 | |
| 2906 | /*-------------------------------------------------------------------------*/ |
| 2907 | |
| 2908 | static void handle_exception(struct fsg_dev *fsg) |
| 2909 | { |
| 2910 | siginfo_t info; |
| 2911 | int sig; |
| 2912 | int i; |
| 2913 | int num_active; |
| 2914 | struct fsg_buffhd *bh; |
| 2915 | enum fsg_state old_state; |
| 2916 | u8 new_config; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 2917 | struct fsg_lun *curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2918 | unsigned int exception_req_tag; |
| 2919 | int rc; |
| 2920 | |
| 2921 | /* Clear the existing signals. Anything but SIGUSR1 is converted |
| 2922 | * into a high-priority EXIT exception. */ |
| 2923 | for (;;) { |
Oleg Nesterov | 8cfbe7e | 2007-05-30 11:06:33 -0400 | [diff] [blame] | 2924 | sig = dequeue_signal_lock(current, ¤t->blocked, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | if (!sig) |
| 2926 | break; |
| 2927 | if (sig != SIGUSR1) { |
| 2928 | if (fsg->state < FSG_STATE_EXIT) |
| 2929 | DBG(fsg, "Main thread exiting on signal\n"); |
| 2930 | raise_exception(fsg, FSG_STATE_EXIT); |
| 2931 | } |
| 2932 | } |
| 2933 | |
| 2934 | /* Cancel all the pending transfers */ |
| 2935 | if (fsg->intreq_busy) |
| 2936 | usb_ep_dequeue(fsg->intr_in, fsg->intreq); |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2937 | for (i = 0; i < fsg_num_buffers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2938 | bh = &fsg->buffhds[i]; |
| 2939 | if (bh->inreq_busy) |
| 2940 | usb_ep_dequeue(fsg->bulk_in, bh->inreq); |
| 2941 | if (bh->outreq_busy) |
| 2942 | usb_ep_dequeue(fsg->bulk_out, bh->outreq); |
| 2943 | } |
| 2944 | |
| 2945 | /* Wait until everything is idle */ |
| 2946 | for (;;) { |
| 2947 | num_active = fsg->intreq_busy; |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2948 | for (i = 0; i < fsg_num_buffers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2949 | bh = &fsg->buffhds[i]; |
| 2950 | num_active += bh->inreq_busy + bh->outreq_busy; |
| 2951 | } |
| 2952 | if (num_active == 0) |
| 2953 | break; |
| 2954 | if (sleep_thread(fsg)) |
| 2955 | return; |
| 2956 | } |
| 2957 | |
| 2958 | /* Clear out the controller's fifos */ |
| 2959 | if (fsg->bulk_in_enabled) |
| 2960 | usb_ep_fifo_flush(fsg->bulk_in); |
| 2961 | if (fsg->bulk_out_enabled) |
| 2962 | usb_ep_fifo_flush(fsg->bulk_out); |
| 2963 | if (fsg->intr_in_enabled) |
| 2964 | usb_ep_fifo_flush(fsg->intr_in); |
| 2965 | |
| 2966 | /* Reset the I/O buffer states and pointers, the SCSI |
| 2967 | * state, and the exception. Then invoke the handler. */ |
| 2968 | spin_lock_irq(&fsg->lock); |
| 2969 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 2970 | for (i = 0; i < fsg_num_buffers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | bh = &fsg->buffhds[i]; |
| 2972 | bh->state = BUF_STATE_EMPTY; |
| 2973 | } |
| 2974 | fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain = |
| 2975 | &fsg->buffhds[0]; |
| 2976 | |
| 2977 | exception_req_tag = fsg->exception_req_tag; |
| 2978 | new_config = fsg->new_config; |
| 2979 | old_state = fsg->state; |
| 2980 | |
| 2981 | if (old_state == FSG_STATE_ABORT_BULK_OUT) |
| 2982 | fsg->state = FSG_STATE_STATUS_PHASE; |
| 2983 | else { |
| 2984 | for (i = 0; i < fsg->nluns; ++i) { |
| 2985 | curlun = &fsg->luns[i]; |
| 2986 | curlun->prevent_medium_removal = 0; |
| 2987 | curlun->sense_data = curlun->unit_attention_data = |
| 2988 | SS_NO_SENSE; |
| 2989 | curlun->sense_data_info = 0; |
Alan Stern | 6174d0f | 2006-09-26 14:51:48 -0400 | [diff] [blame] | 2990 | curlun->info_valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | } |
| 2992 | fsg->state = FSG_STATE_IDLE; |
| 2993 | } |
| 2994 | spin_unlock_irq(&fsg->lock); |
| 2995 | |
| 2996 | /* Carry out any extra actions required for the exception */ |
| 2997 | switch (old_state) { |
| 2998 | default: |
| 2999 | break; |
| 3000 | |
| 3001 | case FSG_STATE_ABORT_BULK_OUT: |
| 3002 | send_status(fsg); |
| 3003 | spin_lock_irq(&fsg->lock); |
| 3004 | if (fsg->state == FSG_STATE_STATUS_PHASE) |
| 3005 | fsg->state = FSG_STATE_IDLE; |
| 3006 | spin_unlock_irq(&fsg->lock); |
| 3007 | break; |
| 3008 | |
| 3009 | case FSG_STATE_RESET: |
| 3010 | /* In case we were forced against our will to halt a |
| 3011 | * bulk endpoint, clear the halt now. (The SuperH UDC |
| 3012 | * requires this.) */ |
Alan Stern | b950bdb | 2008-04-14 11:45:29 -0400 | [diff] [blame] | 3013 | if (test_and_clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | usb_ep_clear_halt(fsg->bulk_in); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3015 | |
| 3016 | if (transport_is_bbb()) { |
| 3017 | if (fsg->ep0_req_tag == exception_req_tag) |
| 3018 | ep0_queue(fsg); // Complete the status stage |
| 3019 | |
| 3020 | } else if (transport_is_cbi()) |
| 3021 | send_status(fsg); // Status by interrupt pipe |
| 3022 | |
| 3023 | /* Technically this should go here, but it would only be |
| 3024 | * a waste of time. Ditto for the INTERFACE_CHANGE and |
| 3025 | * CONFIG_CHANGE cases. */ |
| 3026 | // for (i = 0; i < fsg->nluns; ++i) |
| 3027 | // fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED; |
| 3028 | break; |
| 3029 | |
| 3030 | case FSG_STATE_INTERFACE_CHANGE: |
| 3031 | rc = do_set_interface(fsg, 0); |
| 3032 | if (fsg->ep0_req_tag != exception_req_tag) |
| 3033 | break; |
| 3034 | if (rc != 0) // STALL on errors |
| 3035 | fsg_set_halt(fsg, fsg->ep0); |
| 3036 | else // Complete the status stage |
| 3037 | ep0_queue(fsg); |
| 3038 | break; |
| 3039 | |
| 3040 | case FSG_STATE_CONFIG_CHANGE: |
| 3041 | rc = do_set_config(fsg, new_config); |
| 3042 | if (fsg->ep0_req_tag != exception_req_tag) |
| 3043 | break; |
| 3044 | if (rc != 0) // STALL on errors |
| 3045 | fsg_set_halt(fsg, fsg->ep0); |
| 3046 | else // Complete the status stage |
| 3047 | ep0_queue(fsg); |
| 3048 | break; |
| 3049 | |
| 3050 | case FSG_STATE_DISCONNECT: |
Michal Nazarewicz | b6058d0 | 2009-10-28 16:57:14 +0100 | [diff] [blame] | 3051 | for (i = 0; i < fsg->nluns; ++i) |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3052 | fsg_lun_fsync_sub(fsg->luns + i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3053 | do_set_config(fsg, 0); // Unconfigured state |
| 3054 | break; |
| 3055 | |
| 3056 | case FSG_STATE_EXIT: |
| 3057 | case FSG_STATE_TERMINATED: |
| 3058 | do_set_config(fsg, 0); // Free resources |
| 3059 | spin_lock_irq(&fsg->lock); |
| 3060 | fsg->state = FSG_STATE_TERMINATED; // Stop the thread |
| 3061 | spin_unlock_irq(&fsg->lock); |
| 3062 | break; |
| 3063 | } |
| 3064 | } |
| 3065 | |
| 3066 | |
| 3067 | /*-------------------------------------------------------------------------*/ |
| 3068 | |
| 3069 | static int fsg_main_thread(void *fsg_) |
| 3070 | { |
John Daiker | 7ca46b8 | 2006-12-29 19:02:06 -0800 | [diff] [blame] | 3071 | struct fsg_dev *fsg = fsg_; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3073 | /* Allow the thread to be killed by a signal, but set the signal mask |
| 3074 | * to block everything but INT, TERM, KILL, and USR1. */ |
Oleg Nesterov | 8cfbe7e | 2007-05-30 11:06:33 -0400 | [diff] [blame] | 3075 | allow_signal(SIGINT); |
| 3076 | allow_signal(SIGTERM); |
| 3077 | allow_signal(SIGKILL); |
| 3078 | allow_signal(SIGUSR1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 3080 | /* Allow the thread to be frozen */ |
| 3081 | set_freezable(); |
| 3082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | /* Arrange for userspace references to be interpreted as kernel |
| 3084 | * pointers. That way we can pass a kernel pointer to a routine |
| 3085 | * that expects a __user pointer and it will work okay. */ |
| 3086 | set_fs(get_ds()); |
| 3087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | /* The main loop */ |
| 3089 | while (fsg->state != FSG_STATE_TERMINATED) { |
| 3090 | if (exception_in_progress(fsg) || signal_pending(current)) { |
| 3091 | handle_exception(fsg); |
| 3092 | continue; |
| 3093 | } |
| 3094 | |
| 3095 | if (!fsg->running) { |
| 3096 | sleep_thread(fsg); |
| 3097 | continue; |
| 3098 | } |
| 3099 | |
| 3100 | if (get_next_command(fsg)) |
| 3101 | continue; |
| 3102 | |
| 3103 | spin_lock_irq(&fsg->lock); |
| 3104 | if (!exception_in_progress(fsg)) |
| 3105 | fsg->state = FSG_STATE_DATA_PHASE; |
| 3106 | spin_unlock_irq(&fsg->lock); |
| 3107 | |
| 3108 | if (do_scsi_command(fsg) || finish_reply(fsg)) |
| 3109 | continue; |
| 3110 | |
| 3111 | spin_lock_irq(&fsg->lock); |
| 3112 | if (!exception_in_progress(fsg)) |
| 3113 | fsg->state = FSG_STATE_STATUS_PHASE; |
| 3114 | spin_unlock_irq(&fsg->lock); |
| 3115 | |
| 3116 | if (send_status(fsg)) |
| 3117 | continue; |
| 3118 | |
| 3119 | spin_lock_irq(&fsg->lock); |
| 3120 | if (!exception_in_progress(fsg)) |
| 3121 | fsg->state = FSG_STATE_IDLE; |
| 3122 | spin_unlock_irq(&fsg->lock); |
| 3123 | } |
| 3124 | |
Alan Stern | 22efcf4 | 2005-09-26 16:12:02 -0400 | [diff] [blame] | 3125 | spin_lock_irq(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3126 | fsg->thread_task = NULL; |
Alan Stern | 22efcf4 | 2005-09-26 16:12:02 -0400 | [diff] [blame] | 3127 | spin_unlock_irq(&fsg->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3128 | |
Alan Stern | 82a10a8 | 2009-04-16 15:37:28 -0400 | [diff] [blame] | 3129 | /* If we are exiting because of a signal, unregister the |
| 3130 | * gadget driver. */ |
| 3131 | if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3132 | usb_gadget_unregister_driver(&fsg_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3133 | |
| 3134 | /* Let the unbind and cleanup routines know the thread has exited */ |
| 3135 | complete_and_exit(&fsg->thread_notifier, 0); |
| 3136 | } |
| 3137 | |
| 3138 | |
| 3139 | /*-------------------------------------------------------------------------*/ |
| 3140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | |
| 3142 | /* The write permissions and store_xxx pointers are set in fsg_bind() */ |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 3143 | static DEVICE_ATTR(ro, 0444, fsg_show_ro, NULL); |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 3144 | static DEVICE_ATTR(nofua, 0644, fsg_show_nofua, NULL); |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 3145 | static DEVICE_ATTR(file, 0444, fsg_show_file, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3146 | |
| 3147 | |
| 3148 | /*-------------------------------------------------------------------------*/ |
| 3149 | |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 3150 | static void fsg_release(struct kref *ref) |
| 3151 | { |
| 3152 | struct fsg_dev *fsg = container_of(ref, struct fsg_dev, ref); |
| 3153 | |
| 3154 | kfree(fsg->luns); |
| 3155 | kfree(fsg); |
| 3156 | } |
| 3157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3158 | static void lun_release(struct device *dev) |
| 3159 | { |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 3160 | struct rw_semaphore *filesem = dev_get_drvdata(dev); |
| 3161 | struct fsg_dev *fsg = |
| 3162 | container_of(filesem, struct fsg_dev, filesem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 3164 | kref_put(&fsg->ref, fsg_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3165 | } |
| 3166 | |
David Brownell | a353678 | 2006-07-06 15:48:53 -0700 | [diff] [blame] | 3167 | static void /* __init_or_exit */ fsg_unbind(struct usb_gadget *gadget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | { |
| 3169 | struct fsg_dev *fsg = get_gadget_data(gadget); |
| 3170 | int i; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3171 | struct fsg_lun *curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | struct usb_request *req = fsg->ep0req; |
| 3173 | |
| 3174 | DBG(fsg, "unbind\n"); |
| 3175 | clear_bit(REGISTERED, &fsg->atomic_bitflags); |
| 3176 | |
Yauheni Kaliuta | 91960c2 | 2011-10-13 14:19:05 +0300 | [diff] [blame] | 3177 | /* If the thread isn't already dead, tell it to exit now */ |
| 3178 | if (fsg->state != FSG_STATE_TERMINATED) { |
| 3179 | raise_exception(fsg, FSG_STATE_EXIT); |
| 3180 | wait_for_completion(&fsg->thread_notifier); |
| 3181 | |
| 3182 | /* The cleanup routine waits for this completion also */ |
| 3183 | complete(&fsg->thread_notifier); |
| 3184 | } |
| 3185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | /* Unregister the sysfs attribute files and the LUNs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3187 | for (i = 0; i < fsg->nluns; ++i) { |
| 3188 | curlun = &fsg->luns[i]; |
| 3189 | if (curlun->registered) { |
Michal Nazarewicz | 452ee0e | 2010-08-12 17:43:50 +0200 | [diff] [blame] | 3190 | device_remove_file(&curlun->dev, &dev_attr_nofua); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | device_remove_file(&curlun->dev, &dev_attr_ro); |
| 3192 | device_remove_file(&curlun->dev, &dev_attr_file); |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3193 | fsg_lun_close(curlun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3194 | device_unregister(&curlun->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3195 | curlun->registered = 0; |
| 3196 | } |
| 3197 | } |
| 3198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3199 | /* Free the data buffers */ |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 3200 | for (i = 0; i < fsg_num_buffers; ++i) |
David Brownell | 9d8bab5 | 2007-07-01 11:04:54 -0700 | [diff] [blame] | 3201 | kfree(fsg->buffhds[i].buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3202 | |
| 3203 | /* Free the request and buffer for endpoint 0 */ |
| 3204 | if (req) { |
David Brownell | 9d8bab5 | 2007-07-01 11:04:54 -0700 | [diff] [blame] | 3205 | kfree(req->buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3206 | usb_ep_free_request(fsg->ep0, req); |
| 3207 | } |
| 3208 | |
| 3209 | set_gadget_data(gadget, NULL); |
| 3210 | } |
| 3211 | |
| 3212 | |
| 3213 | static int __init check_parameters(struct fsg_dev *fsg) |
| 3214 | { |
| 3215 | int prot; |
David Brownell | 91e79c9 | 2005-07-13 15:18:30 -0700 | [diff] [blame] | 3216 | int gcnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3217 | |
| 3218 | /* Store the default values */ |
| 3219 | mod_data.transport_type = USB_PR_BULK; |
| 3220 | mod_data.transport_name = "Bulk-only"; |
| 3221 | mod_data.protocol_type = USB_SC_SCSI; |
| 3222 | mod_data.protocol_name = "Transparent SCSI"; |
| 3223 | |
Alan Stern | ce459ec | 2009-02-24 16:19:47 -0500 | [diff] [blame] | 3224 | /* Some peripheral controllers are known not to be able to |
| 3225 | * halt bulk endpoints correctly. If one of them is present, |
| 3226 | * disable stalls. |
| 3227 | */ |
Christoph Egger | 90f7976 | 2010-02-05 13:24:12 +0100 | [diff] [blame] | 3228 | if (gadget_is_at91(fsg->gadget)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3229 | mod_data.can_stall = 0; |
| 3230 | |
| 3231 | if (mod_data.release == 0xffff) { // Parameter wasn't set |
Christoph Egger | 90f7976 | 2010-02-05 13:24:12 +0100 | [diff] [blame] | 3232 | gcnum = usb_gadget_controller_number(fsg->gadget); |
David Brownell | 91e79c9 | 2005-07-13 15:18:30 -0700 | [diff] [blame] | 3233 | if (gcnum >= 0) |
| 3234 | mod_data.release = 0x0300 + gcnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3235 | else { |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 3236 | WARNING(fsg, "controller '%s' not recognized\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | fsg->gadget->name); |
| 3238 | mod_data.release = 0x0399; |
| 3239 | } |
| 3240 | } |
| 3241 | |
| 3242 | prot = simple_strtol(mod_data.protocol_parm, NULL, 0); |
| 3243 | |
| 3244 | #ifdef CONFIG_USB_FILE_STORAGE_TEST |
| 3245 | if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) { |
| 3246 | ; // Use default setting |
| 3247 | } else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) { |
| 3248 | mod_data.transport_type = USB_PR_CB; |
| 3249 | mod_data.transport_name = "Control-Bulk"; |
| 3250 | } else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) { |
| 3251 | mod_data.transport_type = USB_PR_CBI; |
| 3252 | mod_data.transport_name = "Control-Bulk-Interrupt"; |
| 3253 | } else { |
| 3254 | ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm); |
| 3255 | return -EINVAL; |
| 3256 | } |
| 3257 | |
| 3258 | if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 || |
| 3259 | prot == USB_SC_SCSI) { |
| 3260 | ; // Use default setting |
| 3261 | } else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 || |
| 3262 | prot == USB_SC_RBC) { |
| 3263 | mod_data.protocol_type = USB_SC_RBC; |
| 3264 | mod_data.protocol_name = "RBC"; |
| 3265 | } else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 || |
| 3266 | strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 || |
| 3267 | prot == USB_SC_8020) { |
| 3268 | mod_data.protocol_type = USB_SC_8020; |
| 3269 | mod_data.protocol_name = "8020i (ATAPI)"; |
| 3270 | } else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 || |
| 3271 | prot == USB_SC_QIC) { |
| 3272 | mod_data.protocol_type = USB_SC_QIC; |
| 3273 | mod_data.protocol_name = "QIC-157"; |
| 3274 | } else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 || |
| 3275 | prot == USB_SC_UFI) { |
| 3276 | mod_data.protocol_type = USB_SC_UFI; |
| 3277 | mod_data.protocol_name = "UFI"; |
| 3278 | } else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 || |
| 3279 | prot == USB_SC_8070) { |
| 3280 | mod_data.protocol_type = USB_SC_8070; |
| 3281 | mod_data.protocol_name = "8070i"; |
| 3282 | } else { |
| 3283 | ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm); |
| 3284 | return -EINVAL; |
| 3285 | } |
| 3286 | |
| 3287 | mod_data.buflen &= PAGE_CACHE_MASK; |
| 3288 | if (mod_data.buflen <= 0) { |
| 3289 | ERROR(fsg, "invalid buflen\n"); |
| 3290 | return -ETOOSMALL; |
| 3291 | } |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3292 | |
Michal Nazarewicz | 5670649 | 2010-07-22 14:16:37 +0200 | [diff] [blame] | 3293 | #endif /* CONFIG_USB_FILE_STORAGE_TEST */ |
| 3294 | |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3295 | /* Serial string handling. |
| 3296 | * On a real device, the serial string would be loaded |
| 3297 | * from permanent storage. */ |
Michal Nazarewicz | 5670649 | 2010-07-22 14:16:37 +0200 | [diff] [blame] | 3298 | if (mod_data.serial) { |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3299 | const char *ch; |
| 3300 | unsigned len = 0; |
| 3301 | |
| 3302 | /* Sanity check : |
| 3303 | * The CB[I] specification limits the serial string to |
| 3304 | * 12 uppercase hexadecimal characters. |
| 3305 | * BBB need at least 12 uppercase hexadecimal characters, |
| 3306 | * with a maximum of 126. */ |
Michal Nazarewicz | 5670649 | 2010-07-22 14:16:37 +0200 | [diff] [blame] | 3307 | for (ch = mod_data.serial; *ch; ++ch) { |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3308 | ++len; |
| 3309 | if ((*ch < '0' || *ch > '9') && |
| 3310 | (*ch < 'A' || *ch > 'F')) { /* not uppercase hex */ |
| 3311 | WARNING(fsg, |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 3312 | "Invalid serial string character: %c\n", |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3313 | *ch); |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 3314 | goto no_serial; |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3315 | } |
| 3316 | } |
| 3317 | if (len > 126 || |
| 3318 | (mod_data.transport_type == USB_PR_BULK && len < 12) || |
| 3319 | (mod_data.transport_type != USB_PR_BULK && len > 12)) { |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 3320 | WARNING(fsg, "Invalid serial string length!\n"); |
| 3321 | goto no_serial; |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3322 | } |
Michal Nazarewicz | 5670649 | 2010-07-22 14:16:37 +0200 | [diff] [blame] | 3323 | fsg_strings[FSG_STRING_SERIAL - 1].s = mod_data.serial; |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3324 | } else { |
Alan Stern | d808742 | 2010-09-03 11:15:41 -0400 | [diff] [blame] | 3325 | WARNING(fsg, "No serial-number string provided!\n"); |
| 3326 | no_serial: |
| 3327 | device_desc.iSerialNumber = 0; |
Yann Cantin | 87eb1be | 2010-06-05 23:06:31 +0200 | [diff] [blame] | 3328 | } |
| 3329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3330 | return 0; |
| 3331 | } |
| 3332 | |
| 3333 | |
Michal Nazarewicz | e12995e | 2010-08-12 17:43:52 +0200 | [diff] [blame] | 3334 | static int __init fsg_bind(struct usb_gadget *gadget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3335 | { |
| 3336 | struct fsg_dev *fsg = the_fsg; |
| 3337 | int rc; |
| 3338 | int i; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3339 | struct fsg_lun *curlun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3340 | struct usb_ep *ep; |
| 3341 | struct usb_request *req; |
| 3342 | char *pathbuf, *p; |
| 3343 | |
| 3344 | fsg->gadget = gadget; |
| 3345 | set_gadget_data(gadget, fsg); |
| 3346 | fsg->ep0 = gadget->ep0; |
| 3347 | fsg->ep0->driver_data = fsg; |
| 3348 | |
| 3349 | if ((rc = check_parameters(fsg)) != 0) |
| 3350 | goto out; |
| 3351 | |
| 3352 | if (mod_data.removable) { // Enable the store_xxx attributes |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 3353 | dev_attr_file.attr.mode = 0644; |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 3354 | dev_attr_file.store = fsg_store_file; |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 3355 | if (!mod_data.cdrom) { |
| 3356 | dev_attr_ro.attr.mode = 0644; |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 3357 | dev_attr_ro.store = fsg_store_ro; |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 3358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | } |
| 3360 | |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 3361 | /* Only for removable media? */ |
| 3362 | dev_attr_nofua.attr.mode = 0644; |
| 3363 | dev_attr_nofua.store = fsg_store_nofua; |
| 3364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3365 | /* Find out how many LUNs there should be */ |
| 3366 | i = mod_data.nluns; |
| 3367 | if (i == 0) |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 3368 | i = max(mod_data.num_filenames, 1u); |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3369 | if (i > FSG_MAX_LUNS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3370 | ERROR(fsg, "invalid number of LUNs: %d\n", i); |
| 3371 | rc = -EINVAL; |
| 3372 | goto out; |
| 3373 | } |
| 3374 | |
| 3375 | /* Create the LUNs, open their backing files, and register the |
| 3376 | * LUN devices in sysfs. */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3377 | fsg->luns = kzalloc(i * sizeof(struct fsg_lun), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | if (!fsg->luns) { |
| 3379 | rc = -ENOMEM; |
| 3380 | goto out; |
| 3381 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3382 | fsg->nluns = i; |
| 3383 | |
| 3384 | for (i = 0; i < fsg->nluns; ++i) { |
| 3385 | curlun = &fsg->luns[i]; |
Michal Nazarewicz | e909ef5 | 2009-10-28 16:57:16 +0100 | [diff] [blame] | 3386 | curlun->cdrom = !!mod_data.cdrom; |
| 3387 | curlun->ro = mod_data.cdrom || mod_data.ro[i]; |
| 3388 | curlun->initially_ro = curlun->ro; |
| 3389 | curlun->removable = mod_data.removable; |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 3390 | curlun->nofua = mod_data.nofua[i]; |
Alan Stern | 2de9eae | 2006-09-25 14:31:15 -0400 | [diff] [blame] | 3391 | curlun->dev.release = lun_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3392 | curlun->dev.parent = &gadget->dev; |
| 3393 | curlun->dev.driver = &fsg_driver.driver; |
Michal Nazarewicz | 93f9374 | 2009-10-28 16:57:17 +0100 | [diff] [blame] | 3394 | dev_set_drvdata(&curlun->dev, &fsg->filesem); |
Kay Sievers | 0031a06 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 3395 | dev_set_name(&curlun->dev,"%s-lun%d", |
| 3396 | dev_name(&gadget->dev), i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3397 | |
Michal Nazarewicz | d9385b6 | 2010-10-28 17:31:18 +0200 | [diff] [blame] | 3398 | kref_get(&fsg->ref); |
| 3399 | rc = device_register(&curlun->dev); |
| 3400 | if (rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3401 | INFO(fsg, "failed to register LUN%d: %d\n", i, rc); |
Michal Nazarewicz | d9385b6 | 2010-10-28 17:31:18 +0200 | [diff] [blame] | 3402 | put_device(&curlun->dev); |
Alan Stern | 2de9eae | 2006-09-25 14:31:15 -0400 | [diff] [blame] | 3403 | goto out; |
| 3404 | } |
| 3405 | curlun->registered = 1; |
Michal Nazarewicz | d9385b6 | 2010-10-28 17:31:18 +0200 | [diff] [blame] | 3406 | |
| 3407 | rc = device_create_file(&curlun->dev, &dev_attr_ro); |
| 3408 | if (rc) |
| 3409 | goto out; |
| 3410 | rc = device_create_file(&curlun->dev, &dev_attr_nofua); |
| 3411 | if (rc) |
| 3412 | goto out; |
| 3413 | rc = device_create_file(&curlun->dev, &dev_attr_file); |
| 3414 | if (rc) |
| 3415 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3416 | |
Alan Stern | aafe5bd | 2006-03-31 11:46:43 -0500 | [diff] [blame] | 3417 | if (mod_data.file[i] && *mod_data.file[i]) { |
Michal Nazarewicz | d9385b6 | 2010-10-28 17:31:18 +0200 | [diff] [blame] | 3418 | rc = fsg_lun_open(curlun, mod_data.file[i]); |
| 3419 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3420 | goto out; |
| 3421 | } else if (!mod_data.removable) { |
| 3422 | ERROR(fsg, "no file given for LUN%d\n", i); |
| 3423 | rc = -EINVAL; |
| 3424 | goto out; |
| 3425 | } |
| 3426 | } |
| 3427 | |
| 3428 | /* Find all the endpoints we will use */ |
| 3429 | usb_ep_autoconfig_reset(gadget); |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3430 | ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3431 | if (!ep) |
| 3432 | goto autoconf_fail; |
| 3433 | ep->driver_data = fsg; // claim the endpoint |
| 3434 | fsg->bulk_in = ep; |
| 3435 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3436 | ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3437 | if (!ep) |
| 3438 | goto autoconf_fail; |
| 3439 | ep->driver_data = fsg; // claim the endpoint |
| 3440 | fsg->bulk_out = ep; |
| 3441 | |
| 3442 | if (transport_is_cbi()) { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3443 | ep = usb_ep_autoconfig(gadget, &fsg_fs_intr_in_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3444 | if (!ep) |
| 3445 | goto autoconf_fail; |
| 3446 | ep->driver_data = fsg; // claim the endpoint |
| 3447 | fsg->intr_in = ep; |
| 3448 | } |
| 3449 | |
| 3450 | /* Fix up the descriptors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3451 | device_desc.idVendor = cpu_to_le16(mod_data.vendor); |
| 3452 | device_desc.idProduct = cpu_to_le16(mod_data.product); |
| 3453 | device_desc.bcdDevice = cpu_to_le16(mod_data.release); |
| 3454 | |
| 3455 | i = (transport_is_cbi() ? 3 : 2); // Number of endpoints |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3456 | fsg_intf_desc.bNumEndpoints = i; |
| 3457 | fsg_intf_desc.bInterfaceSubClass = mod_data.protocol_type; |
| 3458 | fsg_intf_desc.bInterfaceProtocol = mod_data.transport_type; |
| 3459 | fsg_fs_function[i + FSG_FS_FUNCTION_PRE_EP_ENTRIES] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3460 | |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 3461 | if (gadget_is_dualspeed(gadget)) { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3462 | fsg_hs_function[i + FSG_HS_FUNCTION_PRE_EP_ENTRIES] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3463 | |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 3464 | /* Assume endpoint addresses are the same for both speeds */ |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3465 | fsg_hs_bulk_in_desc.bEndpointAddress = |
| 3466 | fsg_fs_bulk_in_desc.bEndpointAddress; |
| 3467 | fsg_hs_bulk_out_desc.bEndpointAddress = |
| 3468 | fsg_fs_bulk_out_desc.bEndpointAddress; |
| 3469 | fsg_hs_intr_in_desc.bEndpointAddress = |
| 3470 | fsg_fs_intr_in_desc.bEndpointAddress; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | } |
| 3472 | |
Felipe Balbi | 4bb99b7 | 2011-08-03 14:33:27 +0300 | [diff] [blame] | 3473 | if (gadget_is_superspeed(gadget)) { |
| 3474 | unsigned max_burst; |
| 3475 | |
| 3476 | fsg_ss_function[i + FSG_SS_FUNCTION_PRE_EP_ENTRIES] = NULL; |
| 3477 | |
| 3478 | /* Calculate bMaxBurst, we know packet size is 1024 */ |
| 3479 | max_burst = min_t(unsigned, mod_data.buflen / 1024, 15); |
| 3480 | |
| 3481 | /* Assume endpoint addresses are the same for both speeds */ |
| 3482 | fsg_ss_bulk_in_desc.bEndpointAddress = |
| 3483 | fsg_fs_bulk_in_desc.bEndpointAddress; |
| 3484 | fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst; |
| 3485 | |
| 3486 | fsg_ss_bulk_out_desc.bEndpointAddress = |
| 3487 | fsg_fs_bulk_out_desc.bEndpointAddress; |
| 3488 | fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst; |
| 3489 | } |
| 3490 | |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 3491 | if (gadget_is_otg(gadget)) |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3492 | fsg_otg_desc.bmAttributes |= USB_OTG_HNP; |
David Brownell | 2e806f6 | 2007-08-02 00:03:39 -0700 | [diff] [blame] | 3493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3494 | rc = -ENOMEM; |
| 3495 | |
| 3496 | /* Allocate the request and buffer for endpoint 0 */ |
| 3497 | fsg->ep0req = req = usb_ep_alloc_request(fsg->ep0, GFP_KERNEL); |
| 3498 | if (!req) |
| 3499 | goto out; |
David Brownell | 9d8bab5 | 2007-07-01 11:04:54 -0700 | [diff] [blame] | 3500 | req->buf = kmalloc(EP0_BUFSIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3501 | if (!req->buf) |
| 3502 | goto out; |
| 3503 | req->complete = ep0_complete; |
| 3504 | |
| 3505 | /* Allocate the data buffers */ |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 3506 | for (i = 0; i < fsg_num_buffers; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3507 | struct fsg_buffhd *bh = &fsg->buffhds[i]; |
| 3508 | |
Alan Stern | 14cd5f8 | 2006-03-23 15:07:25 -0500 | [diff] [blame] | 3509 | /* Allocate for the bulk-in endpoint. We assume that |
| 3510 | * the buffer will also work with the bulk-out (and |
| 3511 | * interrupt-in) endpoint. */ |
David Brownell | 9d8bab5 | 2007-07-01 11:04:54 -0700 | [diff] [blame] | 3512 | bh->buf = kmalloc(mod_data.buflen, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3513 | if (!bh->buf) |
| 3514 | goto out; |
| 3515 | bh->next = bh + 1; |
| 3516 | } |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 3517 | fsg->buffhds[fsg_num_buffers - 1].next = &fsg->buffhds[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3518 | |
| 3519 | /* This should reflect the actual gadget power source */ |
| 3520 | usb_gadget_set_selfpowered(gadget); |
| 3521 | |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3522 | snprintf(fsg_string_manufacturer, sizeof fsg_string_manufacturer, |
| 3523 | "%s %s with %s", |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 3524 | init_utsname()->sysname, init_utsname()->release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3525 | gadget->name); |
| 3526 | |
Alan Stern | 22efcf4 | 2005-09-26 16:12:02 -0400 | [diff] [blame] | 3527 | fsg->thread_task = kthread_create(fsg_main_thread, fsg, |
| 3528 | "file-storage-gadget"); |
| 3529 | if (IS_ERR(fsg->thread_task)) { |
| 3530 | rc = PTR_ERR(fsg->thread_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3531 | goto out; |
Alan Stern | 22efcf4 | 2005-09-26 16:12:02 -0400 | [diff] [blame] | 3532 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3533 | |
| 3534 | INFO(fsg, DRIVER_DESC ", version: " DRIVER_VERSION "\n"); |
Alan Stern | 664a51a | 2011-06-15 16:31:37 -0400 | [diff] [blame] | 3535 | INFO(fsg, "NOTE: This driver is deprecated. " |
| 3536 | "Consider using g_mass_storage instead.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3537 | INFO(fsg, "Number of LUNs=%d\n", fsg->nluns); |
| 3538 | |
| 3539 | pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); |
| 3540 | for (i = 0; i < fsg->nluns; ++i) { |
| 3541 | curlun = &fsg->luns[i]; |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3542 | if (fsg_lun_is_open(curlun)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3543 | p = NULL; |
| 3544 | if (pathbuf) { |
Jan Blunck | cf28b48 | 2008-02-14 19:38:44 -0800 | [diff] [blame] | 3545 | p = d_path(&curlun->filp->f_path, |
| 3546 | pathbuf, PATH_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3547 | if (IS_ERR(p)) |
| 3548 | p = NULL; |
| 3549 | } |
Andy Shevchenko | a93917d | 2010-07-22 17:53:56 +0300 | [diff] [blame] | 3550 | LINFO(curlun, "ro=%d, nofua=%d, file: %s\n", |
| 3551 | curlun->ro, curlun->nofua, (p ? p : "(error)")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3552 | } |
| 3553 | } |
| 3554 | kfree(pathbuf); |
| 3555 | |
| 3556 | DBG(fsg, "transport=%s (x%02x)\n", |
| 3557 | mod_data.transport_name, mod_data.transport_type); |
| 3558 | DBG(fsg, "protocol=%s (x%02x)\n", |
| 3559 | mod_data.protocol_name, mod_data.protocol_type); |
| 3560 | DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n", |
| 3561 | mod_data.vendor, mod_data.product, mod_data.release); |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 3562 | DBG(fsg, "removable=%d, stall=%d, cdrom=%d, buflen=%u\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3563 | mod_data.removable, mod_data.can_stall, |
Alan Stern | 12aae68 | 2008-11-20 14:13:12 -0500 | [diff] [blame] | 3564 | mod_data.cdrom, mod_data.buflen); |
Pavel Emelyanov | ba25f9d | 2007-10-18 23:40:40 -0700 | [diff] [blame] | 3565 | DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task)); |
Alan Stern | a922c68 | 2005-10-06 16:38:45 -0400 | [diff] [blame] | 3566 | |
| 3567 | set_bit(REGISTERED, &fsg->atomic_bitflags); |
| 3568 | |
| 3569 | /* Tell the thread to start working */ |
| 3570 | wake_up_process(fsg->thread_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3571 | return 0; |
| 3572 | |
| 3573 | autoconf_fail: |
| 3574 | ERROR(fsg, "unable to autoconfigure all endpoints\n"); |
| 3575 | rc = -ENOTSUPP; |
| 3576 | |
| 3577 | out: |
| 3578 | fsg->state = FSG_STATE_TERMINATED; // The thread is dead |
| 3579 | fsg_unbind(gadget); |
Felipe Balbi | 889394b | 2008-12-08 13:50:27 +0200 | [diff] [blame] | 3580 | complete(&fsg->thread_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3581 | return rc; |
| 3582 | } |
| 3583 | |
| 3584 | |
| 3585 | /*-------------------------------------------------------------------------*/ |
| 3586 | |
| 3587 | static void fsg_suspend(struct usb_gadget *gadget) |
| 3588 | { |
| 3589 | struct fsg_dev *fsg = get_gadget_data(gadget); |
| 3590 | |
| 3591 | DBG(fsg, "suspend\n"); |
| 3592 | set_bit(SUSPENDED, &fsg->atomic_bitflags); |
| 3593 | } |
| 3594 | |
| 3595 | static void fsg_resume(struct usb_gadget *gadget) |
| 3596 | { |
| 3597 | struct fsg_dev *fsg = get_gadget_data(gadget); |
| 3598 | |
| 3599 | DBG(fsg, "resume\n"); |
| 3600 | clear_bit(SUSPENDED, &fsg->atomic_bitflags); |
| 3601 | } |
| 3602 | |
| 3603 | |
| 3604 | /*-------------------------------------------------------------------------*/ |
| 3605 | |
| 3606 | static struct usb_gadget_driver fsg_driver = { |
Michal Nazarewicz | 7177aed | 2011-11-19 18:27:38 +0100 | [diff] [blame] | 3607 | .max_speed = USB_SPEED_SUPER, |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3608 | .function = (char *) fsg_string_product, |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 3609 | .unbind = fsg_unbind, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3610 | .disconnect = fsg_disconnect, |
| 3611 | .setup = fsg_setup, |
| 3612 | .suspend = fsg_suspend, |
| 3613 | .resume = fsg_resume, |
| 3614 | |
| 3615 | .driver = { |
Michal Nazarewicz | d618170 | 2009-10-28 16:57:15 +0100 | [diff] [blame] | 3616 | .name = DRIVER_NAME, |
Ben Dooks | d0d5049 | 2005-10-10 10:52:33 +0100 | [diff] [blame] | 3617 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3618 | // .release = ... |
| 3619 | // .suspend = ... |
| 3620 | // .resume = ... |
| 3621 | }, |
| 3622 | }; |
| 3623 | |
| 3624 | |
| 3625 | static int __init fsg_alloc(void) |
| 3626 | { |
| 3627 | struct fsg_dev *fsg; |
| 3628 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 3629 | fsg = kzalloc(sizeof *fsg + |
| 3630 | fsg_num_buffers * sizeof *(fsg->buffhds), GFP_KERNEL); |
| 3631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3632 | if (!fsg) |
| 3633 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3634 | spin_lock_init(&fsg->lock); |
| 3635 | init_rwsem(&fsg->filesem); |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 3636 | kref_init(&fsg->ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3637 | init_completion(&fsg->thread_notifier); |
| 3638 | |
| 3639 | the_fsg = fsg; |
| 3640 | return 0; |
| 3641 | } |
| 3642 | |
| 3643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3644 | static int __init fsg_init(void) |
| 3645 | { |
| 3646 | int rc; |
| 3647 | struct fsg_dev *fsg; |
| 3648 | |
Per Forlin | 6532c7f | 2011-08-19 21:21:27 +0200 | [diff] [blame] | 3649 | rc = fsg_num_buffers_validate(); |
| 3650 | if (rc != 0) |
| 3651 | return rc; |
| 3652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3653 | if ((rc = fsg_alloc()) != 0) |
| 3654 | return rc; |
| 3655 | fsg = the_fsg; |
Uwe Kleine-König | b0fca50 | 2010-08-12 17:43:53 +0200 | [diff] [blame] | 3656 | if ((rc = usb_gadget_probe_driver(&fsg_driver, fsg_bind)) != 0) |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 3657 | kref_put(&fsg->ref, fsg_release); |
Alan Stern | a922c68 | 2005-10-06 16:38:45 -0400 | [diff] [blame] | 3658 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | } |
| 3660 | module_init(fsg_init); |
| 3661 | |
| 3662 | |
| 3663 | static void __exit fsg_cleanup(void) |
| 3664 | { |
| 3665 | struct fsg_dev *fsg = the_fsg; |
| 3666 | |
| 3667 | /* Unregister the driver iff the thread hasn't already done so */ |
| 3668 | if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) |
| 3669 | usb_gadget_unregister_driver(&fsg_driver); |
| 3670 | |
| 3671 | /* Wait for the thread to finish up */ |
| 3672 | wait_for_completion(&fsg->thread_notifier); |
| 3673 | |
Alan Stern | 87c4252 | 2005-11-09 16:59:56 -0500 | [diff] [blame] | 3674 | kref_put(&fsg->ref, fsg_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3675 | } |
| 3676 | module_exit(fsg_cleanup); |