| 1 | /* Driver for USB Mass Storage compliant devices |
| 2 | * |
| 3 | * Current development and maintenance by: |
| 4 | * (c) 1999-2003 Matthew Dharm (mdharm-usb@one-eyed-alien.net) |
| 5 | * |
| 6 | * Developed with the assistance of: |
| 7 | * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) |
| 8 | * (c) 2003-2009 Alan Stern (stern@rowland.harvard.edu) |
| 9 | * |
| 10 | * Initial work by: |
| 11 | * (c) 1999 Michael Gee (michael@linuxspecific.com) |
| 12 | * |
| 13 | * usb_device_id support by Adam J. Richter (adam@yggdrasil.com): |
| 14 | * (c) 2000 Yggdrasil Computing, Inc. |
| 15 | * |
| 16 | * This driver is based on the 'USB Mass Storage Class' document. This |
| 17 | * describes in detail the protocol used to communicate with such |
| 18 | * devices. Clearly, the designers had SCSI and ATAPI commands in |
| 19 | * mind when they created this document. The commands are all very |
| 20 | * similar to commands in the SCSI-II and ATAPI specifications. |
| 21 | * |
| 22 | * It is important to note that in a number of cases this class |
| 23 | * exhibits class-specific exemptions from the USB specification. |
| 24 | * Notably the usage of NAK, STALL and ACK differs from the norm, in |
| 25 | * that they are used to communicate wait, failed and OK on commands. |
| 26 | * |
| 27 | * Also, for certain devices, the interrupt endpoint is used to convey |
| 28 | * status of a command. |
| 29 | * |
| 30 | * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more |
| 31 | * information about this driver. |
| 32 | * |
| 33 | * This program is free software; you can redistribute it and/or modify it |
| 34 | * under the terms of the GNU General Public License as published by the |
| 35 | * Free Software Foundation; either version 2, or (at your option) any |
| 36 | * later version. |
| 37 | * |
| 38 | * This program is distributed in the hope that it will be useful, but |
| 39 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 41 | * General Public License for more details. |
| 42 | * |
| 43 | * You should have received a copy of the GNU General Public License along |
| 44 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 45 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 46 | */ |
| 47 | |
| 48 | #ifdef CONFIG_USB_STORAGE_DEBUG |
| 49 | #define DEBUG |
| 50 | #endif |
| 51 | |
| 52 | #include <linux/sched.h> |
| 53 | #include <linux/errno.h> |
| 54 | #include <linux/freezer.h> |
| 55 | #include <linux/module.h> |
| 56 | #include <linux/slab.h> |
| 57 | #include <linux/kthread.h> |
| 58 | #include <linux/mutex.h> |
| 59 | #include <linux/utsname.h> |
| 60 | |
| 61 | #include <scsi/scsi.h> |
| 62 | #include <scsi/scsi_cmnd.h> |
| 63 | #include <scsi/scsi_device.h> |
| 64 | |
| 65 | #include "usb.h" |
| 66 | #include "scsiglue.h" |
| 67 | #include "transport.h" |
| 68 | #include "protocol.h" |
| 69 | #include "debug.h" |
| 70 | #include "initializers.h" |
| 71 | |
| 72 | #include "sierra_ms.h" |
| 73 | #include "option_ms.h" |
| 74 | |
| 75 | #if IS_ENABLED(CONFIG_USB_UAS) |
| 76 | #include "uas-detect.h" |
| 77 | #endif |
| 78 | |
| 79 | #define DRV_NAME "usb-storage" |
| 80 | |
| 81 | /* Some informational data */ |
| 82 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); |
| 83 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); |
| 84 | MODULE_LICENSE("GPL"); |
| 85 | |
| 86 | static unsigned int delay_use = 1; |
| 87 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); |
| 88 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); |
| 89 | |
| 90 | static char quirks[128]; |
| 91 | module_param_string(quirks, quirks, sizeof(quirks), S_IRUGO | S_IWUSR); |
| 92 | MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks"); |
| 93 | |
| 94 | |
| 95 | /* |
| 96 | * The entries in this table correspond, line for line, |
| 97 | * with the entries in usb_storage_usb_ids[], defined in usual-tables.c. |
| 98 | */ |
| 99 | |
| 100 | /* The vendor name should be kept at eight characters or less, and |
| 101 | * the product name should be kept at 16 characters or less. If a device |
| 102 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names |
| 103 | * normally generated by a device through the INQUIRY response will be |
| 104 | * taken from this list, and this is the reason for the above size |
| 105 | * restriction. However, if the flag is not present, then you |
| 106 | * are free to use as many characters as you like. |
| 107 | */ |
| 108 | |
| 109 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
| 110 | vendor_name, product_name, use_protocol, use_transport, \ |
| 111 | init_function, Flags) \ |
| 112 | { \ |
| 113 | .vendorName = vendor_name, \ |
| 114 | .productName = product_name, \ |
| 115 | .useProtocol = use_protocol, \ |
| 116 | .useTransport = use_transport, \ |
| 117 | .initFunction = init_function, \ |
| 118 | } |
| 119 | |
| 120 | #define COMPLIANT_DEV UNUSUAL_DEV |
| 121 | |
| 122 | #define USUAL_DEV(use_protocol, use_transport) \ |
| 123 | { \ |
| 124 | .useProtocol = use_protocol, \ |
| 125 | .useTransport = use_transport, \ |
| 126 | } |
| 127 | |
| 128 | #define UNUSUAL_VENDOR_INTF(idVendor, cl, sc, pr, \ |
| 129 | vendor_name, product_name, use_protocol, use_transport, \ |
| 130 | init_function, Flags) \ |
| 131 | { \ |
| 132 | .vendorName = vendor_name, \ |
| 133 | .productName = product_name, \ |
| 134 | .useProtocol = use_protocol, \ |
| 135 | .useTransport = use_transport, \ |
| 136 | .initFunction = init_function, \ |
| 137 | } |
| 138 | |
| 139 | static struct us_unusual_dev us_unusual_dev_list[] = { |
| 140 | # include "unusual_devs.h" |
| 141 | { } /* Terminating entry */ |
| 142 | }; |
| 143 | |
| 144 | static struct us_unusual_dev for_dynamic_ids = |
| 145 | USUAL_DEV(USB_SC_SCSI, USB_PR_BULK); |
| 146 | |
| 147 | #undef UNUSUAL_DEV |
| 148 | #undef COMPLIANT_DEV |
| 149 | #undef USUAL_DEV |
| 150 | #undef UNUSUAL_VENDOR_INTF |
| 151 | |
| 152 | #ifdef CONFIG_LOCKDEP |
| 153 | |
| 154 | static struct lock_class_key us_interface_key[USB_MAXINTERFACES]; |
| 155 | |
| 156 | static void us_set_lock_class(struct mutex *mutex, |
| 157 | struct usb_interface *intf) |
| 158 | { |
| 159 | struct usb_device *udev = interface_to_usbdev(intf); |
| 160 | struct usb_host_config *config = udev->actconfig; |
| 161 | int i; |
| 162 | |
| 163 | for (i = 0; i < config->desc.bNumInterfaces; i++) { |
| 164 | if (config->interface[i] == intf) |
| 165 | break; |
| 166 | } |
| 167 | |
| 168 | BUG_ON(i == config->desc.bNumInterfaces); |
| 169 | |
| 170 | lockdep_set_class(mutex, &us_interface_key[i]); |
| 171 | } |
| 172 | |
| 173 | #else |
| 174 | |
| 175 | static void us_set_lock_class(struct mutex *mutex, |
| 176 | struct usb_interface *intf) |
| 177 | { |
| 178 | } |
| 179 | |
| 180 | #endif |
| 181 | |
| 182 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ |
| 183 | |
| 184 | int usb_stor_suspend(struct usb_interface *iface, pm_message_t message) |
| 185 | { |
| 186 | struct us_data *us = usb_get_intfdata(iface); |
| 187 | |
| 188 | /* Wait until no command is running */ |
| 189 | mutex_lock(&us->dev_mutex); |
| 190 | |
| 191 | if (us->suspend_resume_hook) |
| 192 | (us->suspend_resume_hook)(us, US_SUSPEND); |
| 193 | |
| 194 | /* When runtime PM is working, we'll set a flag to indicate |
| 195 | * whether we should autoresume when a SCSI request arrives. */ |
| 196 | |
| 197 | mutex_unlock(&us->dev_mutex); |
| 198 | return 0; |
| 199 | } |
| 200 | EXPORT_SYMBOL_GPL(usb_stor_suspend); |
| 201 | |
| 202 | int usb_stor_resume(struct usb_interface *iface) |
| 203 | { |
| 204 | struct us_data *us = usb_get_intfdata(iface); |
| 205 | |
| 206 | mutex_lock(&us->dev_mutex); |
| 207 | |
| 208 | if (us->suspend_resume_hook) |
| 209 | (us->suspend_resume_hook)(us, US_RESUME); |
| 210 | |
| 211 | mutex_unlock(&us->dev_mutex); |
| 212 | return 0; |
| 213 | } |
| 214 | EXPORT_SYMBOL_GPL(usb_stor_resume); |
| 215 | |
| 216 | int usb_stor_reset_resume(struct usb_interface *iface) |
| 217 | { |
| 218 | struct us_data *us = usb_get_intfdata(iface); |
| 219 | |
| 220 | /* Report the reset to the SCSI core */ |
| 221 | usb_stor_report_bus_reset(us); |
| 222 | |
| 223 | /* FIXME: Notify the subdrivers that they need to reinitialize |
| 224 | * the device */ |
| 225 | return 0; |
| 226 | } |
| 227 | EXPORT_SYMBOL_GPL(usb_stor_reset_resume); |
| 228 | |
| 229 | #endif /* CONFIG_PM */ |
| 230 | |
| 231 | /* |
| 232 | * The next two routines get called just before and just after |
| 233 | * a USB port reset, whether from this driver or a different one. |
| 234 | */ |
| 235 | |
| 236 | int usb_stor_pre_reset(struct usb_interface *iface) |
| 237 | { |
| 238 | struct us_data *us = usb_get_intfdata(iface); |
| 239 | |
| 240 | /* Make sure no command runs during the reset */ |
| 241 | mutex_lock(&us->dev_mutex); |
| 242 | return 0; |
| 243 | } |
| 244 | EXPORT_SYMBOL_GPL(usb_stor_pre_reset); |
| 245 | |
| 246 | int usb_stor_post_reset(struct usb_interface *iface) |
| 247 | { |
| 248 | struct us_data *us = usb_get_intfdata(iface); |
| 249 | |
| 250 | /* Report the reset to the SCSI core */ |
| 251 | usb_stor_report_bus_reset(us); |
| 252 | |
| 253 | /* FIXME: Notify the subdrivers that they need to reinitialize |
| 254 | * the device */ |
| 255 | |
| 256 | mutex_unlock(&us->dev_mutex); |
| 257 | return 0; |
| 258 | } |
| 259 | EXPORT_SYMBOL_GPL(usb_stor_post_reset); |
| 260 | |
| 261 | /* |
| 262 | * fill_inquiry_response takes an unsigned char array (which must |
| 263 | * be at least 36 characters) and populates the vendor name, |
| 264 | * product name, and revision fields. Then the array is copied |
| 265 | * into the SCSI command's response buffer (oddly enough |
| 266 | * called request_buffer). data_len contains the length of the |
| 267 | * data array, which again must be at least 36. |
| 268 | */ |
| 269 | |
| 270 | void fill_inquiry_response(struct us_data *us, unsigned char *data, |
| 271 | unsigned int data_len) |
| 272 | { |
| 273 | if (data_len < 36) /* You lose. */ |
| 274 | return; |
| 275 | |
| 276 | memset(data+8, ' ', 28); |
| 277 | if (data[0]&0x20) { /* USB device currently not connected. Return |
| 278 | peripheral qualifier 001b ("...however, the |
| 279 | physical device is not currently connected |
| 280 | to this logical unit") and leave vendor and |
| 281 | product identification empty. ("If the target |
| 282 | does store some of the INQUIRY data on the |
| 283 | device, it may return zeros or ASCII spaces |
| 284 | (20h) in those fields until the data is |
| 285 | available from the device."). */ |
| 286 | } else { |
| 287 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); |
| 288 | int n; |
| 289 | |
| 290 | n = strlen(us->unusual_dev->vendorName); |
| 291 | memcpy(data+8, us->unusual_dev->vendorName, min(8, n)); |
| 292 | n = strlen(us->unusual_dev->productName); |
| 293 | memcpy(data+16, us->unusual_dev->productName, min(16, n)); |
| 294 | |
| 295 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); |
| 296 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); |
| 297 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); |
| 298 | data[35] = 0x30 + ((bcdDevice) & 0x0F); |
| 299 | } |
| 300 | |
| 301 | usb_stor_set_xfer_buf(data, data_len, us->srb); |
| 302 | } |
| 303 | EXPORT_SYMBOL_GPL(fill_inquiry_response); |
| 304 | |
| 305 | static int usb_stor_control_thread(void * __us) |
| 306 | { |
| 307 | struct us_data *us = (struct us_data *)__us; |
| 308 | struct Scsi_Host *host = us_to_host(us); |
| 309 | |
| 310 | for (;;) { |
| 311 | usb_stor_dbg(us, "*** thread sleeping\n"); |
| 312 | if (wait_for_completion_interruptible(&us->cmnd_ready)) |
| 313 | break; |
| 314 | |
| 315 | usb_stor_dbg(us, "*** thread awakened\n"); |
| 316 | |
| 317 | /* lock the device pointers */ |
| 318 | mutex_lock(&(us->dev_mutex)); |
| 319 | |
| 320 | /* lock access to the state */ |
| 321 | scsi_lock(host); |
| 322 | |
| 323 | /* When we are called with no command pending, we're done */ |
| 324 | if (us->srb == NULL) { |
| 325 | scsi_unlock(host); |
| 326 | mutex_unlock(&us->dev_mutex); |
| 327 | usb_stor_dbg(us, "-- exiting\n"); |
| 328 | break; |
| 329 | } |
| 330 | |
| 331 | /* has the command timed out *already* ? */ |
| 332 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| 333 | us->srb->result = DID_ABORT << 16; |
| 334 | goto SkipForAbort; |
| 335 | } |
| 336 | |
| 337 | scsi_unlock(host); |
| 338 | |
| 339 | /* reject the command if the direction indicator |
| 340 | * is UNKNOWN |
| 341 | */ |
| 342 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { |
| 343 | usb_stor_dbg(us, "UNKNOWN data direction\n"); |
| 344 | us->srb->result = DID_ERROR << 16; |
| 345 | } |
| 346 | |
| 347 | /* reject if target != 0 or if LUN is higher than |
| 348 | * the maximum known LUN |
| 349 | */ |
| 350 | else if (us->srb->device->id && |
| 351 | !(us->fflags & US_FL_SCM_MULT_TARG)) { |
| 352 | usb_stor_dbg(us, "Bad target number (%d:%llu)\n", |
| 353 | us->srb->device->id, |
| 354 | us->srb->device->lun); |
| 355 | us->srb->result = DID_BAD_TARGET << 16; |
| 356 | } |
| 357 | |
| 358 | else if (us->srb->device->lun > us->max_lun) { |
| 359 | usb_stor_dbg(us, "Bad LUN (%d:%llu)\n", |
| 360 | us->srb->device->id, |
| 361 | us->srb->device->lun); |
| 362 | us->srb->result = DID_BAD_TARGET << 16; |
| 363 | } |
| 364 | |
| 365 | /* Handle those devices which need us to fake |
| 366 | * their inquiry data */ |
| 367 | else if ((us->srb->cmnd[0] == INQUIRY) && |
| 368 | (us->fflags & US_FL_FIX_INQUIRY)) { |
| 369 | unsigned char data_ptr[36] = { |
| 370 | 0x00, 0x80, 0x02, 0x02, |
| 371 | 0x1F, 0x00, 0x00, 0x00}; |
| 372 | |
| 373 | usb_stor_dbg(us, "Faking INQUIRY command\n"); |
| 374 | fill_inquiry_response(us, data_ptr, 36); |
| 375 | us->srb->result = SAM_STAT_GOOD; |
| 376 | } |
| 377 | |
| 378 | /* we've got a command, let's do it! */ |
| 379 | else { |
| 380 | US_DEBUG(usb_stor_show_command(us, us->srb)); |
| 381 | us->proto_handler(us->srb, us); |
| 382 | usb_mark_last_busy(us->pusb_dev); |
| 383 | } |
| 384 | |
| 385 | /* lock access to the state */ |
| 386 | scsi_lock(host); |
| 387 | |
| 388 | /* indicate that the command is done */ |
| 389 | if (us->srb->result != DID_ABORT << 16) { |
| 390 | usb_stor_dbg(us, "scsi cmd done, result=0x%x\n", |
| 391 | us->srb->result); |
| 392 | us->srb->scsi_done(us->srb); |
| 393 | } else { |
| 394 | SkipForAbort: |
| 395 | usb_stor_dbg(us, "scsi command aborted\n"); |
| 396 | } |
| 397 | |
| 398 | /* If an abort request was received we need to signal that |
| 399 | * the abort has finished. The proper test for this is |
| 400 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because |
| 401 | * the timeout might have occurred after the command had |
| 402 | * already completed with a different result code. */ |
| 403 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
| 404 | complete(&(us->notify)); |
| 405 | |
| 406 | /* Allow USB transfers to resume */ |
| 407 | clear_bit(US_FLIDX_ABORTING, &us->dflags); |
| 408 | clear_bit(US_FLIDX_TIMED_OUT, &us->dflags); |
| 409 | } |
| 410 | |
| 411 | /* finished working on this command */ |
| 412 | us->srb = NULL; |
| 413 | scsi_unlock(host); |
| 414 | |
| 415 | /* unlock the device pointers */ |
| 416 | mutex_unlock(&us->dev_mutex); |
| 417 | } /* for (;;) */ |
| 418 | |
| 419 | /* Wait until we are told to stop */ |
| 420 | for (;;) { |
| 421 | set_current_state(TASK_INTERRUPTIBLE); |
| 422 | if (kthread_should_stop()) |
| 423 | break; |
| 424 | schedule(); |
| 425 | } |
| 426 | __set_current_state(TASK_RUNNING); |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | /*********************************************************************** |
| 431 | * Device probing and disconnecting |
| 432 | ***********************************************************************/ |
| 433 | |
| 434 | /* Associate our private data with the USB device */ |
| 435 | static int associate_dev(struct us_data *us, struct usb_interface *intf) |
| 436 | { |
| 437 | /* Fill in the device-related fields */ |
| 438 | us->pusb_dev = interface_to_usbdev(intf); |
| 439 | us->pusb_intf = intf; |
| 440 | us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
| 441 | usb_stor_dbg(us, "Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", |
| 442 | le16_to_cpu(us->pusb_dev->descriptor.idVendor), |
| 443 | le16_to_cpu(us->pusb_dev->descriptor.idProduct), |
| 444 | le16_to_cpu(us->pusb_dev->descriptor.bcdDevice)); |
| 445 | usb_stor_dbg(us, "Interface Subclass: 0x%02x, Protocol: 0x%02x\n", |
| 446 | intf->cur_altsetting->desc.bInterfaceSubClass, |
| 447 | intf->cur_altsetting->desc.bInterfaceProtocol); |
| 448 | |
| 449 | /* Store our private data in the interface */ |
| 450 | usb_set_intfdata(intf, us); |
| 451 | |
| 452 | /* Allocate the control/setup and DMA-mapped buffers */ |
| 453 | us->cr = kmalloc(sizeof(*us->cr), GFP_KERNEL); |
| 454 | if (!us->cr) |
| 455 | return -ENOMEM; |
| 456 | |
| 457 | us->iobuf = usb_alloc_coherent(us->pusb_dev, US_IOBUF_SIZE, |
| 458 | GFP_KERNEL, &us->iobuf_dma); |
| 459 | if (!us->iobuf) { |
| 460 | usb_stor_dbg(us, "I/O buffer allocation failed\n"); |
| 461 | return -ENOMEM; |
| 462 | } |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | /* Works only for digits and letters, but small and fast */ |
| 467 | #define TOLOWER(x) ((x) | 0x20) |
| 468 | |
| 469 | /* Adjust device flags based on the "quirks=" module parameter */ |
| 470 | void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags) |
| 471 | { |
| 472 | char *p; |
| 473 | u16 vid = le16_to_cpu(udev->descriptor.idVendor); |
| 474 | u16 pid = le16_to_cpu(udev->descriptor.idProduct); |
| 475 | unsigned f = 0; |
| 476 | unsigned int mask = (US_FL_SANE_SENSE | US_FL_BAD_SENSE | |
| 477 | US_FL_FIX_CAPACITY | US_FL_IGNORE_UAS | |
| 478 | US_FL_CAPACITY_HEURISTICS | US_FL_IGNORE_DEVICE | |
| 479 | US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 | |
| 480 | US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE | |
| 481 | US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT | |
| 482 | US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 | |
| 483 | US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE | |
| 484 | US_FL_NO_ATA_1X | US_FL_NO_REPORT_OPCODES | |
| 485 | US_FL_MAX_SECTORS_240 | US_FL_NO_REPORT_LUNS); |
| 486 | |
| 487 | p = quirks; |
| 488 | while (*p) { |
| 489 | /* Each entry consists of VID:PID:flags */ |
| 490 | if (vid == simple_strtoul(p, &p, 16) && |
| 491 | *p == ':' && |
| 492 | pid == simple_strtoul(p+1, &p, 16) && |
| 493 | *p == ':') |
| 494 | break; |
| 495 | |
| 496 | /* Move forward to the next entry */ |
| 497 | while (*p) { |
| 498 | if (*p++ == ',') |
| 499 | break; |
| 500 | } |
| 501 | } |
| 502 | if (!*p) /* No match */ |
| 503 | return; |
| 504 | |
| 505 | /* Collect the flags */ |
| 506 | while (*++p && *p != ',') { |
| 507 | switch (TOLOWER(*p)) { |
| 508 | case 'a': |
| 509 | f |= US_FL_SANE_SENSE; |
| 510 | break; |
| 511 | case 'b': |
| 512 | f |= US_FL_BAD_SENSE; |
| 513 | break; |
| 514 | case 'c': |
| 515 | f |= US_FL_FIX_CAPACITY; |
| 516 | break; |
| 517 | case 'd': |
| 518 | f |= US_FL_NO_READ_DISC_INFO; |
| 519 | break; |
| 520 | case 'e': |
| 521 | f |= US_FL_NO_READ_CAPACITY_16; |
| 522 | break; |
| 523 | case 'f': |
| 524 | f |= US_FL_NO_REPORT_OPCODES; |
| 525 | break; |
| 526 | case 'g': |
| 527 | f |= US_FL_MAX_SECTORS_240; |
| 528 | break; |
| 529 | case 'h': |
| 530 | f |= US_FL_CAPACITY_HEURISTICS; |
| 531 | break; |
| 532 | case 'i': |
| 533 | f |= US_FL_IGNORE_DEVICE; |
| 534 | break; |
| 535 | case 'j': |
| 536 | f |= US_FL_NO_REPORT_LUNS; |
| 537 | break; |
| 538 | case 'l': |
| 539 | f |= US_FL_NOT_LOCKABLE; |
| 540 | break; |
| 541 | case 'm': |
| 542 | f |= US_FL_MAX_SECTORS_64; |
| 543 | break; |
| 544 | case 'n': |
| 545 | f |= US_FL_INITIAL_READ10; |
| 546 | break; |
| 547 | case 'o': |
| 548 | f |= US_FL_CAPACITY_OK; |
| 549 | break; |
| 550 | case 'p': |
| 551 | f |= US_FL_WRITE_CACHE; |
| 552 | break; |
| 553 | case 'r': |
| 554 | f |= US_FL_IGNORE_RESIDUE; |
| 555 | break; |
| 556 | case 's': |
| 557 | f |= US_FL_SINGLE_LUN; |
| 558 | break; |
| 559 | case 't': |
| 560 | f |= US_FL_NO_ATA_1X; |
| 561 | break; |
| 562 | case 'u': |
| 563 | f |= US_FL_IGNORE_UAS; |
| 564 | break; |
| 565 | case 'w': |
| 566 | f |= US_FL_NO_WP_DETECT; |
| 567 | break; |
| 568 | /* Ignore unrecognized flag characters */ |
| 569 | } |
| 570 | } |
| 571 | *fflags = (*fflags & ~mask) | f; |
| 572 | } |
| 573 | EXPORT_SYMBOL_GPL(usb_stor_adjust_quirks); |
| 574 | |
| 575 | /* Get the unusual_devs entries and the string descriptors */ |
| 576 | static int get_device_info(struct us_data *us, const struct usb_device_id *id, |
| 577 | struct us_unusual_dev *unusual_dev) |
| 578 | { |
| 579 | struct usb_device *dev = us->pusb_dev; |
| 580 | struct usb_interface_descriptor *idesc = |
| 581 | &us->pusb_intf->cur_altsetting->desc; |
| 582 | struct device *pdev = &us->pusb_intf->dev; |
| 583 | |
| 584 | /* Store the entries */ |
| 585 | us->unusual_dev = unusual_dev; |
| 586 | us->subclass = (unusual_dev->useProtocol == USB_SC_DEVICE) ? |
| 587 | idesc->bInterfaceSubClass : |
| 588 | unusual_dev->useProtocol; |
| 589 | us->protocol = (unusual_dev->useTransport == USB_PR_DEVICE) ? |
| 590 | idesc->bInterfaceProtocol : |
| 591 | unusual_dev->useTransport; |
| 592 | us->fflags = id->driver_info; |
| 593 | usb_stor_adjust_quirks(us->pusb_dev, &us->fflags); |
| 594 | |
| 595 | if (us->fflags & US_FL_IGNORE_DEVICE) { |
| 596 | dev_info(pdev, "device ignored\n"); |
| 597 | return -ENODEV; |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * This flag is only needed when we're in high-speed, so let's |
| 602 | * disable it if we're in full-speed |
| 603 | */ |
| 604 | if (dev->speed != USB_SPEED_HIGH) |
| 605 | us->fflags &= ~US_FL_GO_SLOW; |
| 606 | |
| 607 | if (us->fflags) |
| 608 | dev_info(pdev, "Quirks match for vid %04x pid %04x: %lx\n", |
| 609 | le16_to_cpu(dev->descriptor.idVendor), |
| 610 | le16_to_cpu(dev->descriptor.idProduct), |
| 611 | us->fflags); |
| 612 | |
| 613 | /* Log a message if a non-generic unusual_dev entry contains an |
| 614 | * unnecessary subclass or protocol override. This may stimulate |
| 615 | * reports from users that will help us remove unneeded entries |
| 616 | * from the unusual_devs.h table. |
| 617 | */ |
| 618 | if (id->idVendor || id->idProduct) { |
| 619 | static const char *msgs[3] = { |
| 620 | "an unneeded SubClass entry", |
| 621 | "an unneeded Protocol entry", |
| 622 | "unneeded SubClass and Protocol entries"}; |
| 623 | struct usb_device_descriptor *ddesc = &dev->descriptor; |
| 624 | int msg = -1; |
| 625 | |
| 626 | if (unusual_dev->useProtocol != USB_SC_DEVICE && |
| 627 | us->subclass == idesc->bInterfaceSubClass) |
| 628 | msg += 1; |
| 629 | if (unusual_dev->useTransport != USB_PR_DEVICE && |
| 630 | us->protocol == idesc->bInterfaceProtocol) |
| 631 | msg += 2; |
| 632 | if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE)) |
| 633 | dev_notice(pdev, "This device " |
| 634 | "(%04x,%04x,%04x S %02x P %02x)" |
| 635 | " has %s in unusual_devs.h (kernel" |
| 636 | " %s)\n" |
| 637 | " Please send a copy of this message to " |
| 638 | "<linux-usb@vger.kernel.org> and " |
| 639 | "<usb-storage@lists.one-eyed-alien.net>\n", |
| 640 | le16_to_cpu(ddesc->idVendor), |
| 641 | le16_to_cpu(ddesc->idProduct), |
| 642 | le16_to_cpu(ddesc->bcdDevice), |
| 643 | idesc->bInterfaceSubClass, |
| 644 | idesc->bInterfaceProtocol, |
| 645 | msgs[msg], |
| 646 | utsname()->release); |
| 647 | } |
| 648 | |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | /* Get the transport settings */ |
| 653 | static void get_transport(struct us_data *us) |
| 654 | { |
| 655 | switch (us->protocol) { |
| 656 | case USB_PR_CB: |
| 657 | us->transport_name = "Control/Bulk"; |
| 658 | us->transport = usb_stor_CB_transport; |
| 659 | us->transport_reset = usb_stor_CB_reset; |
| 660 | us->max_lun = 7; |
| 661 | break; |
| 662 | |
| 663 | case USB_PR_CBI: |
| 664 | us->transport_name = "Control/Bulk/Interrupt"; |
| 665 | us->transport = usb_stor_CB_transport; |
| 666 | us->transport_reset = usb_stor_CB_reset; |
| 667 | us->max_lun = 7; |
| 668 | break; |
| 669 | |
| 670 | case USB_PR_BULK: |
| 671 | us->transport_name = "Bulk"; |
| 672 | us->transport = usb_stor_Bulk_transport; |
| 673 | us->transport_reset = usb_stor_Bulk_reset; |
| 674 | break; |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | /* Get the protocol settings */ |
| 679 | static void get_protocol(struct us_data *us) |
| 680 | { |
| 681 | switch (us->subclass) { |
| 682 | case USB_SC_RBC: |
| 683 | us->protocol_name = "Reduced Block Commands (RBC)"; |
| 684 | us->proto_handler = usb_stor_transparent_scsi_command; |
| 685 | break; |
| 686 | |
| 687 | case USB_SC_8020: |
| 688 | us->protocol_name = "8020i"; |
| 689 | us->proto_handler = usb_stor_pad12_command; |
| 690 | us->max_lun = 0; |
| 691 | break; |
| 692 | |
| 693 | case USB_SC_QIC: |
| 694 | us->protocol_name = "QIC-157"; |
| 695 | us->proto_handler = usb_stor_pad12_command; |
| 696 | us->max_lun = 0; |
| 697 | break; |
| 698 | |
| 699 | case USB_SC_8070: |
| 700 | us->protocol_name = "8070i"; |
| 701 | us->proto_handler = usb_stor_pad12_command; |
| 702 | us->max_lun = 0; |
| 703 | break; |
| 704 | |
| 705 | case USB_SC_SCSI: |
| 706 | us->protocol_name = "Transparent SCSI"; |
| 707 | us->proto_handler = usb_stor_transparent_scsi_command; |
| 708 | break; |
| 709 | |
| 710 | case USB_SC_UFI: |
| 711 | us->protocol_name = "Uniform Floppy Interface (UFI)"; |
| 712 | us->proto_handler = usb_stor_ufi_command; |
| 713 | break; |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | /* Get the pipe settings */ |
| 718 | static int get_pipes(struct us_data *us) |
| 719 | { |
| 720 | struct usb_host_interface *altsetting = |
| 721 | us->pusb_intf->cur_altsetting; |
| 722 | int i; |
| 723 | struct usb_endpoint_descriptor *ep; |
| 724 | struct usb_endpoint_descriptor *ep_in = NULL; |
| 725 | struct usb_endpoint_descriptor *ep_out = NULL; |
| 726 | struct usb_endpoint_descriptor *ep_int = NULL; |
| 727 | |
| 728 | /* |
| 729 | * Find the first endpoint of each type we need. |
| 730 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
| 731 | * An optional interrupt-in is OK (necessary for CBI protocol). |
| 732 | * We will ignore any others. |
| 733 | */ |
| 734 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { |
| 735 | ep = &altsetting->endpoint[i].desc; |
| 736 | |
| 737 | if (usb_endpoint_xfer_bulk(ep)) { |
| 738 | if (usb_endpoint_dir_in(ep)) { |
| 739 | if (!ep_in) |
| 740 | ep_in = ep; |
| 741 | } else { |
| 742 | if (!ep_out) |
| 743 | ep_out = ep; |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | else if (usb_endpoint_is_int_in(ep)) { |
| 748 | if (!ep_int) |
| 749 | ep_int = ep; |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | if (!ep_in || !ep_out || (us->protocol == USB_PR_CBI && !ep_int)) { |
| 754 | usb_stor_dbg(us, "Endpoint sanity check failed! Rejecting dev.\n"); |
| 755 | return -EIO; |
| 756 | } |
| 757 | |
| 758 | /* Calculate and store the pipe values */ |
| 759 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); |
| 760 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); |
| 761 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, |
| 762 | usb_endpoint_num(ep_out)); |
| 763 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, |
| 764 | usb_endpoint_num(ep_in)); |
| 765 | if (ep_int) { |
| 766 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, |
| 767 | usb_endpoint_num(ep_int)); |
| 768 | us->ep_bInterval = ep_int->bInterval; |
| 769 | } |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | /* Initialize all the dynamic resources we need */ |
| 774 | static int usb_stor_acquire_resources(struct us_data *us) |
| 775 | { |
| 776 | int p; |
| 777 | struct task_struct *th; |
| 778 | |
| 779 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 780 | if (!us->current_urb) { |
| 781 | usb_stor_dbg(us, "URB allocation failed\n"); |
| 782 | return -ENOMEM; |
| 783 | } |
| 784 | |
| 785 | /* Just before we start our control thread, initialize |
| 786 | * the device if it needs initialization */ |
| 787 | if (us->unusual_dev->initFunction) { |
| 788 | p = us->unusual_dev->initFunction(us); |
| 789 | if (p) |
| 790 | return p; |
| 791 | } |
| 792 | |
| 793 | /* Start up our control thread */ |
| 794 | th = kthread_run(usb_stor_control_thread, us, "usb-storage"); |
| 795 | if (IS_ERR(th)) { |
| 796 | dev_warn(&us->pusb_intf->dev, |
| 797 | "Unable to start control thread\n"); |
| 798 | return PTR_ERR(th); |
| 799 | } |
| 800 | us->ctl_thread = th; |
| 801 | |
| 802 | return 0; |
| 803 | } |
| 804 | |
| 805 | /* Release all our dynamic resources */ |
| 806 | static void usb_stor_release_resources(struct us_data *us) |
| 807 | { |
| 808 | /* Tell the control thread to exit. The SCSI host must |
| 809 | * already have been removed and the DISCONNECTING flag set |
| 810 | * so that we won't accept any more commands. |
| 811 | */ |
| 812 | usb_stor_dbg(us, "-- sending exit command to thread\n"); |
| 813 | complete(&us->cmnd_ready); |
| 814 | if (us->ctl_thread) |
| 815 | kthread_stop(us->ctl_thread); |
| 816 | |
| 817 | /* Call the destructor routine, if it exists */ |
| 818 | if (us->extra_destructor) { |
| 819 | usb_stor_dbg(us, "-- calling extra_destructor()\n"); |
| 820 | us->extra_destructor(us->extra); |
| 821 | } |
| 822 | |
| 823 | /* Free the extra data and the URB */ |
| 824 | kfree(us->extra); |
| 825 | usb_free_urb(us->current_urb); |
| 826 | } |
| 827 | |
| 828 | /* Dissociate from the USB device */ |
| 829 | static void dissociate_dev(struct us_data *us) |
| 830 | { |
| 831 | /* Free the buffers */ |
| 832 | kfree(us->cr); |
| 833 | usb_free_coherent(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, us->iobuf_dma); |
| 834 | |
| 835 | /* Remove our private data from the interface */ |
| 836 | usb_set_intfdata(us->pusb_intf, NULL); |
| 837 | } |
| 838 | |
| 839 | /* First stage of disconnect processing: stop SCSI scanning, |
| 840 | * remove the host, and stop accepting new commands |
| 841 | */ |
| 842 | static void quiesce_and_remove_host(struct us_data *us) |
| 843 | { |
| 844 | struct Scsi_Host *host = us_to_host(us); |
| 845 | |
| 846 | /* If the device is really gone, cut short reset delays */ |
| 847 | if (us->pusb_dev->state == USB_STATE_NOTATTACHED) { |
| 848 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); |
| 849 | wake_up(&us->delay_wait); |
| 850 | } |
| 851 | |
| 852 | /* Prevent SCSI scanning (if it hasn't started yet) |
| 853 | * or wait for the SCSI-scanning routine to stop. |
| 854 | */ |
| 855 | cancel_delayed_work_sync(&us->scan_dwork); |
| 856 | |
| 857 | /* Balance autopm calls if scanning was cancelled */ |
| 858 | if (test_bit(US_FLIDX_SCAN_PENDING, &us->dflags)) |
| 859 | usb_autopm_put_interface_no_suspend(us->pusb_intf); |
| 860 | |
| 861 | /* Removing the host will perform an orderly shutdown: caches |
| 862 | * synchronized, disks spun down, etc. |
| 863 | */ |
| 864 | scsi_remove_host(host); |
| 865 | |
| 866 | /* Prevent any new commands from being accepted and cut short |
| 867 | * reset delays. |
| 868 | */ |
| 869 | scsi_lock(host); |
| 870 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); |
| 871 | scsi_unlock(host); |
| 872 | wake_up(&us->delay_wait); |
| 873 | } |
| 874 | |
| 875 | /* Second stage of disconnect processing: deallocate all resources */ |
| 876 | static void release_everything(struct us_data *us) |
| 877 | { |
| 878 | usb_stor_release_resources(us); |
| 879 | dissociate_dev(us); |
| 880 | |
| 881 | /* Drop our reference to the host; the SCSI core will free it |
| 882 | * (and "us" along with it) when the refcount becomes 0. */ |
| 883 | scsi_host_put(us_to_host(us)); |
| 884 | } |
| 885 | |
| 886 | /* Delayed-work routine to carry out SCSI-device scanning */ |
| 887 | static void usb_stor_scan_dwork(struct work_struct *work) |
| 888 | { |
| 889 | struct us_data *us = container_of(work, struct us_data, |
| 890 | scan_dwork.work); |
| 891 | struct device *dev = &us->pusb_intf->dev; |
| 892 | |
| 893 | dev_dbg(dev, "starting scan\n"); |
| 894 | |
| 895 | /* For bulk-only devices, determine the max LUN value */ |
| 896 | if (us->protocol == USB_PR_BULK && |
| 897 | !(us->fflags & US_FL_SINGLE_LUN) && |
| 898 | !(us->fflags & US_FL_SCM_MULT_TARG)) { |
| 899 | mutex_lock(&us->dev_mutex); |
| 900 | us->max_lun = usb_stor_Bulk_max_lun(us); |
| 901 | /* |
| 902 | * Allow proper scanning of devices that present more than 8 LUNs |
| 903 | * While not affecting other devices that may need the previous behavior |
| 904 | */ |
| 905 | if (us->max_lun >= 8) |
| 906 | us_to_host(us)->max_lun = us->max_lun+1; |
| 907 | mutex_unlock(&us->dev_mutex); |
| 908 | } |
| 909 | scsi_scan_host(us_to_host(us)); |
| 910 | dev_dbg(dev, "scan complete\n"); |
| 911 | |
| 912 | /* Should we unbind if no devices were detected? */ |
| 913 | |
| 914 | usb_autopm_put_interface(us->pusb_intf); |
| 915 | clear_bit(US_FLIDX_SCAN_PENDING, &us->dflags); |
| 916 | } |
| 917 | |
| 918 | static unsigned int usb_stor_sg_tablesize(struct usb_interface *intf) |
| 919 | { |
| 920 | struct usb_device *usb_dev = interface_to_usbdev(intf); |
| 921 | |
| 922 | if (usb_dev->bus->sg_tablesize) { |
| 923 | return usb_dev->bus->sg_tablesize; |
| 924 | } |
| 925 | return SG_ALL; |
| 926 | } |
| 927 | |
| 928 | /* First part of general USB mass-storage probing */ |
| 929 | int usb_stor_probe1(struct us_data **pus, |
| 930 | struct usb_interface *intf, |
| 931 | const struct usb_device_id *id, |
| 932 | struct us_unusual_dev *unusual_dev, |
| 933 | struct scsi_host_template *sht) |
| 934 | { |
| 935 | struct Scsi_Host *host; |
| 936 | struct us_data *us; |
| 937 | int result; |
| 938 | |
| 939 | dev_info(&intf->dev, "USB Mass Storage device detected\n"); |
| 940 | |
| 941 | /* |
| 942 | * Ask the SCSI layer to allocate a host structure, with extra |
| 943 | * space at the end for our private us_data structure. |
| 944 | */ |
| 945 | host = scsi_host_alloc(sht, sizeof(*us)); |
| 946 | if (!host) { |
| 947 | dev_warn(&intf->dev, "Unable to allocate the scsi host\n"); |
| 948 | return -ENOMEM; |
| 949 | } |
| 950 | |
| 951 | /* |
| 952 | * Allow 16-byte CDBs and thus > 2TB |
| 953 | */ |
| 954 | host->max_cmd_len = 16; |
| 955 | host->sg_tablesize = usb_stor_sg_tablesize(intf); |
| 956 | *pus = us = host_to_us(host); |
| 957 | mutex_init(&(us->dev_mutex)); |
| 958 | us_set_lock_class(&us->dev_mutex, intf); |
| 959 | init_completion(&us->cmnd_ready); |
| 960 | init_completion(&(us->notify)); |
| 961 | init_waitqueue_head(&us->delay_wait); |
| 962 | INIT_DELAYED_WORK(&us->scan_dwork, usb_stor_scan_dwork); |
| 963 | |
| 964 | /* Associate the us_data structure with the USB device */ |
| 965 | result = associate_dev(us, intf); |
| 966 | if (result) |
| 967 | goto BadDevice; |
| 968 | |
| 969 | /* Get the unusual_devs entries and the descriptors */ |
| 970 | result = get_device_info(us, id, unusual_dev); |
| 971 | if (result) |
| 972 | goto BadDevice; |
| 973 | |
| 974 | /* Get standard transport and protocol settings */ |
| 975 | get_transport(us); |
| 976 | get_protocol(us); |
| 977 | |
| 978 | /* Give the caller a chance to fill in specialized transport |
| 979 | * or protocol settings. |
| 980 | */ |
| 981 | return 0; |
| 982 | |
| 983 | BadDevice: |
| 984 | usb_stor_dbg(us, "storage_probe() failed\n"); |
| 985 | release_everything(us); |
| 986 | return result; |
| 987 | } |
| 988 | EXPORT_SYMBOL_GPL(usb_stor_probe1); |
| 989 | |
| 990 | /* Second part of general USB mass-storage probing */ |
| 991 | int usb_stor_probe2(struct us_data *us) |
| 992 | { |
| 993 | int result; |
| 994 | struct device *dev = &us->pusb_intf->dev; |
| 995 | |
| 996 | /* Make sure the transport and protocol have both been set */ |
| 997 | if (!us->transport || !us->proto_handler) { |
| 998 | result = -ENXIO; |
| 999 | goto BadDevice; |
| 1000 | } |
| 1001 | usb_stor_dbg(us, "Transport: %s\n", us->transport_name); |
| 1002 | usb_stor_dbg(us, "Protocol: %s\n", us->protocol_name); |
| 1003 | |
| 1004 | if (us->fflags & US_FL_SCM_MULT_TARG) { |
| 1005 | /* |
| 1006 | * SCM eUSCSI bridge devices can have different numbers |
| 1007 | * of LUNs on different targets; allow all to be probed. |
| 1008 | */ |
| 1009 | us->max_lun = 7; |
| 1010 | /* The eUSCSI itself has ID 7, so avoid scanning that */ |
| 1011 | us_to_host(us)->this_id = 7; |
| 1012 | /* max_id is 8 initially, so no need to set it here */ |
| 1013 | } else { |
| 1014 | /* In the normal case there is only a single target */ |
| 1015 | us_to_host(us)->max_id = 1; |
| 1016 | /* |
| 1017 | * Like Windows, we won't store the LUN bits in CDB[1] for |
| 1018 | * SCSI-2 devices using the Bulk-Only transport (even though |
| 1019 | * this violates the SCSI spec). |
| 1020 | */ |
| 1021 | if (us->transport == usb_stor_Bulk_transport) |
| 1022 | us_to_host(us)->no_scsi2_lun_in_cdb = 1; |
| 1023 | } |
| 1024 | |
| 1025 | /* fix for single-lun devices */ |
| 1026 | if (us->fflags & US_FL_SINGLE_LUN) |
| 1027 | us->max_lun = 0; |
| 1028 | |
| 1029 | /* Find the endpoints and calculate pipe values */ |
| 1030 | result = get_pipes(us); |
| 1031 | if (result) |
| 1032 | goto BadDevice; |
| 1033 | |
| 1034 | /* |
| 1035 | * If the device returns invalid data for the first READ(10) |
| 1036 | * command, indicate the command should be retried. |
| 1037 | */ |
| 1038 | if (us->fflags & US_FL_INITIAL_READ10) |
| 1039 | set_bit(US_FLIDX_REDO_READ10, &us->dflags); |
| 1040 | |
| 1041 | /* Acquire all the other resources and add the host */ |
| 1042 | result = usb_stor_acquire_resources(us); |
| 1043 | if (result) |
| 1044 | goto BadDevice; |
| 1045 | snprintf(us->scsi_name, sizeof(us->scsi_name), "usb-storage %s", |
| 1046 | dev_name(&us->pusb_intf->dev)); |
| 1047 | result = scsi_add_host(us_to_host(us), dev); |
| 1048 | if (result) { |
| 1049 | dev_warn(dev, |
| 1050 | "Unable to add the scsi host\n"); |
| 1051 | goto BadDevice; |
| 1052 | } |
| 1053 | |
| 1054 | /* Submit the delayed_work for SCSI-device scanning */ |
| 1055 | usb_autopm_get_interface_no_resume(us->pusb_intf); |
| 1056 | set_bit(US_FLIDX_SCAN_PENDING, &us->dflags); |
| 1057 | |
| 1058 | if (delay_use > 0) |
| 1059 | dev_dbg(dev, "waiting for device to settle before scanning\n"); |
| 1060 | queue_delayed_work(system_freezable_wq, &us->scan_dwork, |
| 1061 | delay_use * HZ); |
| 1062 | return 0; |
| 1063 | |
| 1064 | /* We come here if there are any problems */ |
| 1065 | BadDevice: |
| 1066 | usb_stor_dbg(us, "storage_probe() failed\n"); |
| 1067 | release_everything(us); |
| 1068 | return result; |
| 1069 | } |
| 1070 | EXPORT_SYMBOL_GPL(usb_stor_probe2); |
| 1071 | |
| 1072 | /* Handle a USB mass-storage disconnect */ |
| 1073 | void usb_stor_disconnect(struct usb_interface *intf) |
| 1074 | { |
| 1075 | struct us_data *us = usb_get_intfdata(intf); |
| 1076 | |
| 1077 | quiesce_and_remove_host(us); |
| 1078 | release_everything(us); |
| 1079 | } |
| 1080 | EXPORT_SYMBOL_GPL(usb_stor_disconnect); |
| 1081 | |
| 1082 | static struct scsi_host_template usb_stor_host_template; |
| 1083 | |
| 1084 | /* The main probe routine for standard devices */ |
| 1085 | static int storage_probe(struct usb_interface *intf, |
| 1086 | const struct usb_device_id *id) |
| 1087 | { |
| 1088 | struct us_unusual_dev *unusual_dev; |
| 1089 | struct us_data *us; |
| 1090 | int result; |
| 1091 | int size; |
| 1092 | |
| 1093 | /* If uas is enabled and this device can do uas then ignore it. */ |
| 1094 | #if IS_ENABLED(CONFIG_USB_UAS) |
| 1095 | if (uas_use_uas_driver(intf, id, NULL)) |
| 1096 | return -ENXIO; |
| 1097 | #endif |
| 1098 | |
| 1099 | /* |
| 1100 | * If the device isn't standard (is handled by a subdriver |
| 1101 | * module) then don't accept it. |
| 1102 | */ |
| 1103 | if (usb_usual_ignore_device(intf)) |
| 1104 | return -ENXIO; |
| 1105 | |
| 1106 | /* |
| 1107 | * Call the general probe procedures. |
| 1108 | * |
| 1109 | * The unusual_dev_list array is parallel to the usb_storage_usb_ids |
| 1110 | * table, so we use the index of the id entry to find the |
| 1111 | * corresponding unusual_devs entry. |
| 1112 | */ |
| 1113 | |
| 1114 | size = ARRAY_SIZE(us_unusual_dev_list); |
| 1115 | if (id >= usb_storage_usb_ids && id < usb_storage_usb_ids + size) { |
| 1116 | unusual_dev = (id - usb_storage_usb_ids) + us_unusual_dev_list; |
| 1117 | } else { |
| 1118 | unusual_dev = &for_dynamic_ids; |
| 1119 | |
| 1120 | dev_dbg(&intf->dev, "Use Bulk-Only transport with the Transparent SCSI protocol for dynamic id: 0x%04x 0x%04x\n", |
| 1121 | id->idVendor, id->idProduct); |
| 1122 | } |
| 1123 | |
| 1124 | result = usb_stor_probe1(&us, intf, id, unusual_dev, |
| 1125 | &usb_stor_host_template); |
| 1126 | if (result) |
| 1127 | return result; |
| 1128 | |
| 1129 | /* No special transport or protocol settings in the main module */ |
| 1130 | |
| 1131 | result = usb_stor_probe2(us); |
| 1132 | return result; |
| 1133 | } |
| 1134 | |
| 1135 | static struct usb_driver usb_storage_driver = { |
| 1136 | .name = DRV_NAME, |
| 1137 | .probe = storage_probe, |
| 1138 | .disconnect = usb_stor_disconnect, |
| 1139 | .suspend = usb_stor_suspend, |
| 1140 | .resume = usb_stor_resume, |
| 1141 | .reset_resume = usb_stor_reset_resume, |
| 1142 | .pre_reset = usb_stor_pre_reset, |
| 1143 | .post_reset = usb_stor_post_reset, |
| 1144 | .id_table = usb_storage_usb_ids, |
| 1145 | .supports_autosuspend = 1, |
| 1146 | .soft_unbind = 1, |
| 1147 | }; |
| 1148 | |
| 1149 | module_usb_stor_driver(usb_storage_driver, usb_stor_host_template, DRV_NAME); |