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Commit | Line | Data |
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1da177e4 | 1 | /* Driver for USB Mass Storage compliant devices |
1da177e4 LT |
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) | |
e6e244b6 | 8 | * (c) 2003-2009 Alan Stern (stern@rowland.harvard.edu) |
1da177e4 LT |
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 | ||
9eb66f71 MW |
48 | #ifdef CONFIG_USB_STORAGE_DEBUG |
49 | #define DEBUG | |
50 | #endif | |
51 | ||
1da177e4 LT |
52 | #include <linux/sched.h> |
53 | #include <linux/errno.h> | |
7dfb7103 | 54 | #include <linux/freezer.h> |
1da177e4 | 55 | #include <linux/module.h> |
1da177e4 | 56 | #include <linux/slab.h> |
3f13e66e | 57 | #include <linux/kthread.h> |
4186ecf8 | 58 | #include <linux/mutex.h> |
00f8b0c1 | 59 | #include <linux/utsname.h> |
1da177e4 LT |
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 | ||
32fe5e39 | 72 | #include "sierra_ms.h" |
281b064f | 73 | #include "option_ms.h" |
1da177e4 | 74 | |
5bfd5b5d HG |
75 | #if IS_ENABLED(CONFIG_USB_UAS) |
76 | #include "uas-detect.h" | |
77 | #endif | |
78 | ||
1da177e4 LT |
79 | /* Some informational data */ |
80 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); | |
81 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); | |
82 | MODULE_LICENSE("GPL"); | |
83 | ||
a4a47bc0 | 84 | static unsigned int delay_use = 1; |
1da177e4 LT |
85 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); |
86 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); | |
87 | ||
c838ea46 AS |
88 | static char quirks[128]; |
89 | module_param_string(quirks, quirks, sizeof(quirks), S_IRUGO | S_IWUSR); | |
d4f373e5 AS |
90 | MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks"); |
91 | ||
1da177e4 | 92 | |
a00828e9 PZ |
93 | /* |
94 | * The entries in this table correspond, line for line, | |
e6e244b6 | 95 | * with the entries in usb_storage_usb_ids[], defined in usual-tables.c. |
1da177e4 | 96 | */ |
1da177e4 LT |
97 | |
98 | /* The vendor name should be kept at eight characters or less, and | |
99 | * the product name should be kept at 16 characters or less. If a device | |
100 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names | |
a6cd244b | 101 | * normally generated by a device through the INQUIRY response will be |
1da177e4 LT |
102 | * taken from this list, and this is the reason for the above size |
103 | * restriction. However, if the flag is not present, then you | |
104 | * are free to use as many characters as you like. | |
105 | */ | |
106 | ||
1da177e4 LT |
107 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
108 | vendor_name, product_name, use_protocol, use_transport, \ | |
109 | init_function, Flags) \ | |
110 | { \ | |
111 | .vendorName = vendor_name, \ | |
112 | .productName = product_name, \ | |
113 | .useProtocol = use_protocol, \ | |
114 | .useTransport = use_transport, \ | |
115 | .initFunction = init_function, \ | |
a00828e9 PZ |
116 | } |
117 | ||
25ff1c31 AS |
118 | #define COMPLIANT_DEV UNUSUAL_DEV |
119 | ||
f61870ee | 120 | #define USUAL_DEV(use_protocol, use_transport) \ |
a00828e9 PZ |
121 | { \ |
122 | .useProtocol = use_protocol, \ | |
123 | .useTransport = use_transport, \ | |
1da177e4 LT |
124 | } |
125 | ||
07c7be3d | 126 | #define UNUSUAL_VENDOR_INTF(idVendor, cl, sc, pr, \ |
127 | vendor_name, product_name, use_protocol, use_transport, \ | |
128 | init_function, Flags) \ | |
129 | { \ | |
130 | .vendorName = vendor_name, \ | |
131 | .productName = product_name, \ | |
132 | .useProtocol = use_protocol, \ | |
133 | .useTransport = use_transport, \ | |
134 | .initFunction = init_function, \ | |
135 | } | |
136 | ||
1da177e4 | 137 | static struct us_unusual_dev us_unusual_dev_list[] = { |
a1631062 | 138 | # include "unusual_devs.h" |
e6e244b6 | 139 | { } /* Terminating entry */ |
1da177e4 LT |
140 | }; |
141 | ||
fd7ff36d | 142 | static struct us_unusual_dev for_dynamic_ids = |
f61870ee | 143 | USUAL_DEV(USB_SC_SCSI, USB_PR_BULK); |
fd7ff36d | 144 | |
e6e244b6 AS |
145 | #undef UNUSUAL_DEV |
146 | #undef COMPLIANT_DEV | |
147 | #undef USUAL_DEV | |
07c7be3d | 148 | #undef UNUSUAL_VENDOR_INTF |
e6e244b6 | 149 | |
c825bab0 ML |
150 | #ifdef CONFIG_LOCKDEP |
151 | ||
152 | static struct lock_class_key us_interface_key[USB_MAXINTERFACES]; | |
153 | ||
154 | static void us_set_lock_class(struct mutex *mutex, | |
155 | struct usb_interface *intf) | |
156 | { | |
157 | struct usb_device *udev = interface_to_usbdev(intf); | |
158 | struct usb_host_config *config = udev->actconfig; | |
159 | int i; | |
160 | ||
161 | for (i = 0; i < config->desc.bNumInterfaces; i++) { | |
162 | if (config->interface[i] == intf) | |
163 | break; | |
164 | } | |
165 | ||
166 | BUG_ON(i == config->desc.bNumInterfaces); | |
167 | ||
168 | lockdep_set_class(mutex, &us_interface_key[i]); | |
169 | } | |
170 | ||
171 | #else | |
172 | ||
173 | static void us_set_lock_class(struct mutex *mutex, | |
174 | struct usb_interface *intf) | |
175 | { | |
176 | } | |
177 | ||
178 | #endif | |
ce2596df AS |
179 | |
180 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ | |
181 | ||
e6e244b6 | 182 | int usb_stor_suspend(struct usb_interface *iface, pm_message_t message) |
ce2596df AS |
183 | { |
184 | struct us_data *us = usb_get_intfdata(iface); | |
185 | ||
186 | /* Wait until no command is running */ | |
4186ecf8 | 187 | mutex_lock(&us->dev_mutex); |
ce2596df | 188 | |
7931e1c6 MD |
189 | if (us->suspend_resume_hook) |
190 | (us->suspend_resume_hook)(us, US_SUSPEND); | |
ce2596df | 191 | |
d526875d GKH |
192 | /* When runtime PM is working, we'll set a flag to indicate |
193 | * whether we should autoresume when a SCSI request arrives. */ | |
194 | ||
4186ecf8 | 195 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
196 | return 0; |
197 | } | |
e6e244b6 | 198 | EXPORT_SYMBOL_GPL(usb_stor_suspend); |
ce2596df | 199 | |
e6e244b6 | 200 | int usb_stor_resume(struct usb_interface *iface) |
ce2596df AS |
201 | { |
202 | struct us_data *us = usb_get_intfdata(iface); | |
203 | ||
d526875d | 204 | mutex_lock(&us->dev_mutex); |
8dfe4b14 | 205 | |
7931e1c6 MD |
206 | if (us->suspend_resume_hook) |
207 | (us->suspend_resume_hook)(us, US_RESUME); | |
ce2596df | 208 | |
d526875d | 209 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
210 | return 0; |
211 | } | |
e6e244b6 | 212 | EXPORT_SYMBOL_GPL(usb_stor_resume); |
ce2596df | 213 | |
e6e244b6 | 214 | int usb_stor_reset_resume(struct usb_interface *iface) |
f07600cf AS |
215 | { |
216 | struct us_data *us = usb_get_intfdata(iface); | |
217 | ||
f07600cf AS |
218 | /* Report the reset to the SCSI core */ |
219 | usb_stor_report_bus_reset(us); | |
220 | ||
221 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
222 | * the device */ | |
223 | return 0; | |
224 | } | |
e6e244b6 | 225 | EXPORT_SYMBOL_GPL(usb_stor_reset_resume); |
f07600cf | 226 | |
ce2596df | 227 | #endif /* CONFIG_PM */ |
1da177e4 | 228 | |
47104b0d AS |
229 | /* |
230 | * The next two routines get called just before and just after | |
231 | * a USB port reset, whether from this driver or a different one. | |
232 | */ | |
233 | ||
e6e244b6 | 234 | int usb_stor_pre_reset(struct usb_interface *iface) |
47104b0d AS |
235 | { |
236 | struct us_data *us = usb_get_intfdata(iface); | |
237 | ||
47104b0d AS |
238 | /* Make sure no command runs during the reset */ |
239 | mutex_lock(&us->dev_mutex); | |
f07600cf | 240 | return 0; |
47104b0d | 241 | } |
e6e244b6 | 242 | EXPORT_SYMBOL_GPL(usb_stor_pre_reset); |
47104b0d | 243 | |
e6e244b6 | 244 | int usb_stor_post_reset(struct usb_interface *iface) |
47104b0d AS |
245 | { |
246 | struct us_data *us = usb_get_intfdata(iface); | |
247 | ||
47104b0d | 248 | /* Report the reset to the SCSI core */ |
47104b0d | 249 | usb_stor_report_bus_reset(us); |
47104b0d AS |
250 | |
251 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
252 | * the device */ | |
0458d5b4 | 253 | |
f07600cf AS |
254 | mutex_unlock(&us->dev_mutex); |
255 | return 0; | |
47104b0d | 256 | } |
e6e244b6 | 257 | EXPORT_SYMBOL_GPL(usb_stor_post_reset); |
47104b0d | 258 | |
1da177e4 LT |
259 | /* |
260 | * fill_inquiry_response takes an unsigned char array (which must | |
261 | * be at least 36 characters) and populates the vendor name, | |
262 | * product name, and revision fields. Then the array is copied | |
263 | * into the SCSI command's response buffer (oddly enough | |
264 | * called request_buffer). data_len contains the length of the | |
265 | * data array, which again must be at least 36. | |
266 | */ | |
267 | ||
268 | void fill_inquiry_response(struct us_data *us, unsigned char *data, | |
269 | unsigned int data_len) | |
270 | { | |
a1631062 | 271 | if (data_len < 36) /* You lose. */ |
1da177e4 LT |
272 | return; |
273 | ||
f3f6faa9 | 274 | memset(data+8, ' ', 28); |
db2c8624 | 275 | if (data[0]&0x20) { /* USB device currently not connected. Return |
1da177e4 LT |
276 | peripheral qualifier 001b ("...however, the |
277 | physical device is not currently connected | |
278 | to this logical unit") and leave vendor and | |
279 | product identification empty. ("If the target | |
280 | does store some of the INQUIRY data on the | |
a1631062 | 281 | device, it may return zeros or ASCII spaces |
1da177e4 LT |
282 | (20h) in those fields until the data is |
283 | available from the device."). */ | |
1da177e4 LT |
284 | } else { |
285 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); | |
f3f6faa9 AS |
286 | int n; |
287 | ||
288 | n = strlen(us->unusual_dev->vendorName); | |
289 | memcpy(data+8, us->unusual_dev->vendorName, min(8, n)); | |
290 | n = strlen(us->unusual_dev->productName); | |
291 | memcpy(data+16, us->unusual_dev->productName, min(16, n)); | |
292 | ||
1da177e4 LT |
293 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); |
294 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); | |
295 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); | |
296 | data[35] = 0x30 + ((bcdDevice) & 0x0F); | |
297 | } | |
298 | ||
299 | usb_stor_set_xfer_buf(data, data_len, us->srb); | |
300 | } | |
e6e244b6 | 301 | EXPORT_SYMBOL_GPL(fill_inquiry_response); |
1da177e4 LT |
302 | |
303 | static int usb_stor_control_thread(void * __us) | |
304 | { | |
305 | struct us_data *us = (struct us_data *)__us; | |
306 | struct Scsi_Host *host = us_to_host(us); | |
307 | ||
db2c8624 | 308 | for (;;) { |
191648d0 | 309 | usb_stor_dbg(us, "*** thread sleeping\n"); |
7119e3c3 | 310 | if (wait_for_completion_interruptible(&us->cmnd_ready)) |
1da177e4 | 311 | break; |
7119e3c3 | 312 | |
191648d0 | 313 | usb_stor_dbg(us, "*** thread awakened\n"); |
1da177e4 LT |
314 | |
315 | /* lock the device pointers */ | |
4186ecf8 | 316 | mutex_lock(&(us->dev_mutex)); |
1da177e4 | 317 | |
543f7810 AS |
318 | /* lock access to the state */ |
319 | scsi_lock(host); | |
320 | ||
321 | /* When we are called with no command pending, we're done */ | |
322 | if (us->srb == NULL) { | |
323 | scsi_unlock(host); | |
4186ecf8 | 324 | mutex_unlock(&us->dev_mutex); |
191648d0 | 325 | usb_stor_dbg(us, "-- exiting\n"); |
1da177e4 LT |
326 | break; |
327 | } | |
328 | ||
1da177e4 | 329 | /* has the command timed out *already* ? */ |
7e4d6c38 | 330 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
331 | us->srb->result = DID_ABORT << 16; |
332 | goto SkipForAbort; | |
333 | } | |
334 | ||
335 | scsi_unlock(host); | |
336 | ||
a1631062 | 337 | /* reject the command if the direction indicator |
1da177e4 LT |
338 | * is UNKNOWN |
339 | */ | |
340 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { | |
191648d0 | 341 | usb_stor_dbg(us, "UNKNOWN data direction\n"); |
1da177e4 LT |
342 | us->srb->result = DID_ERROR << 16; |
343 | } | |
344 | ||
345 | /* reject if target != 0 or if LUN is higher than | |
346 | * the maximum known LUN | |
347 | */ | |
a1631062 | 348 | else if (us->srb->device->id && |
7e4d6c38 | 349 | !(us->fflags & US_FL_SCM_MULT_TARG)) { |
9cb78c16 HR |
350 | usb_stor_dbg(us, "Bad target number (%d:%llu)\n", |
351 | us->srb->device->id, | |
352 | us->srb->device->lun); | |
1da177e4 LT |
353 | us->srb->result = DID_BAD_TARGET << 16; |
354 | } | |
355 | ||
356 | else if (us->srb->device->lun > us->max_lun) { | |
9cb78c16 HR |
357 | usb_stor_dbg(us, "Bad LUN (%d:%llu)\n", |
358 | us->srb->device->id, | |
359 | us->srb->device->lun); | |
1da177e4 LT |
360 | us->srb->result = DID_BAD_TARGET << 16; |
361 | } | |
362 | ||
a1631062 | 363 | /* Handle those devices which need us to fake |
1da177e4 LT |
364 | * their inquiry data */ |
365 | else if ((us->srb->cmnd[0] == INQUIRY) && | |
7e4d6c38 | 366 | (us->fflags & US_FL_FIX_INQUIRY)) { |
1da177e4 LT |
367 | unsigned char data_ptr[36] = { |
368 | 0x00, 0x80, 0x02, 0x02, | |
369 | 0x1F, 0x00, 0x00, 0x00}; | |
370 | ||
191648d0 | 371 | usb_stor_dbg(us, "Faking INQUIRY command\n"); |
1da177e4 LT |
372 | fill_inquiry_response(us, data_ptr, 36); |
373 | us->srb->result = SAM_STAT_GOOD; | |
374 | } | |
375 | ||
376 | /* we've got a command, let's do it! */ | |
377 | else { | |
191648d0 | 378 | US_DEBUG(usb_stor_show_command(us, us->srb)); |
1da177e4 | 379 | us->proto_handler(us->srb, us); |
f283925f | 380 | usb_mark_last_busy(us->pusb_dev); |
1da177e4 LT |
381 | } |
382 | ||
383 | /* lock access to the state */ | |
384 | scsi_lock(host); | |
385 | ||
386 | /* indicate that the command is done */ | |
543f7810 | 387 | if (us->srb->result != DID_ABORT << 16) { |
191648d0 JP |
388 | usb_stor_dbg(us, "scsi cmd done, result=0x%x\n", |
389 | us->srb->result); | |
1da177e4 LT |
390 | us->srb->scsi_done(us->srb); |
391 | } else { | |
392 | SkipForAbort: | |
191648d0 | 393 | usb_stor_dbg(us, "scsi command aborted\n"); |
1da177e4 LT |
394 | } |
395 | ||
396 | /* If an abort request was received we need to signal that | |
397 | * the abort has finished. The proper test for this is | |
398 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because | |
226173ed MD |
399 | * the timeout might have occurred after the command had |
400 | * already completed with a different result code. */ | |
7e4d6c38 | 401 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
402 | complete(&(us->notify)); |
403 | ||
226173ed | 404 | /* Allow USB transfers to resume */ |
7e4d6c38 AS |
405 | clear_bit(US_FLIDX_ABORTING, &us->dflags); |
406 | clear_bit(US_FLIDX_TIMED_OUT, &us->dflags); | |
226173ed MD |
407 | } |
408 | ||
1da177e4 LT |
409 | /* finished working on this command */ |
410 | us->srb = NULL; | |
411 | scsi_unlock(host); | |
412 | ||
413 | /* unlock the device pointers */ | |
4186ecf8 | 414 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
415 | } /* for (;;) */ |
416 | ||
ed76cacb AS |
417 | /* Wait until we are told to stop */ |
418 | for (;;) { | |
419 | set_current_state(TASK_INTERRUPTIBLE); | |
420 | if (kthread_should_stop()) | |
421 | break; | |
422 | schedule(); | |
423 | } | |
424 | __set_current_state(TASK_RUNNING); | |
425 | return 0; | |
a1631062 | 426 | } |
1da177e4 LT |
427 | |
428 | /*********************************************************************** | |
429 | * Device probing and disconnecting | |
430 | ***********************************************************************/ | |
431 | ||
432 | /* Associate our private data with the USB device */ | |
433 | static int associate_dev(struct us_data *us, struct usb_interface *intf) | |
434 | { | |
1da177e4 LT |
435 | /* Fill in the device-related fields */ |
436 | us->pusb_dev = interface_to_usbdev(intf); | |
437 | us->pusb_intf = intf; | |
438 | us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
191648d0 JP |
439 | usb_stor_dbg(us, "Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", |
440 | le16_to_cpu(us->pusb_dev->descriptor.idVendor), | |
441 | le16_to_cpu(us->pusb_dev->descriptor.idProduct), | |
442 | le16_to_cpu(us->pusb_dev->descriptor.bcdDevice)); | |
443 | usb_stor_dbg(us, "Interface Subclass: 0x%02x, Protocol: 0x%02x\n", | |
444 | intf->cur_altsetting->desc.bInterfaceSubClass, | |
445 | intf->cur_altsetting->desc.bInterfaceProtocol); | |
1da177e4 LT |
446 | |
447 | /* Store our private data in the interface */ | |
448 | usb_set_intfdata(intf, us); | |
449 | ||
0ede76fc AS |
450 | /* Allocate the control/setup and DMA-mapped buffers */ |
451 | us->cr = kmalloc(sizeof(*us->cr), GFP_KERNEL); | |
191648d0 | 452 | if (!us->cr) |
1da177e4 | 453 | return -ENOMEM; |
1da177e4 | 454 | |
997ea58e | 455 | us->iobuf = usb_alloc_coherent(us->pusb_dev, US_IOBUF_SIZE, |
1da177e4 LT |
456 | GFP_KERNEL, &us->iobuf_dma); |
457 | if (!us->iobuf) { | |
191648d0 | 458 | usb_stor_dbg(us, "I/O buffer allocation failed\n"); |
1da177e4 LT |
459 | return -ENOMEM; |
460 | } | |
461 | return 0; | |
462 | } | |
463 | ||
c838ea46 AS |
464 | /* Works only for digits and letters, but small and fast */ |
465 | #define TOLOWER(x) ((x) | 0x20) | |
466 | ||
d4f373e5 | 467 | /* Adjust device flags based on the "quirks=" module parameter */ |
d24d481b | 468 | void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags) |
d4f373e5 | 469 | { |
c838ea46 | 470 | char *p; |
d24d481b HG |
471 | u16 vid = le16_to_cpu(udev->descriptor.idVendor); |
472 | u16 pid = le16_to_cpu(udev->descriptor.idProduct); | |
c838ea46 | 473 | unsigned f = 0; |
a91b593e | 474 | unsigned int mask = (US_FL_SANE_SENSE | US_FL_BAD_SENSE | |
d24d481b | 475 | US_FL_FIX_CAPACITY | US_FL_IGNORE_UAS | |
c838ea46 | 476 | US_FL_CAPACITY_HEURISTICS | US_FL_IGNORE_DEVICE | |
d4f373e5 | 477 | US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 | |
c838ea46 | 478 | US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE | |
5116901d | 479 | US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT | |
21c13a4f | 480 | US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 | |
59307852 | 481 | US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE | |
734016b0 | 482 | US_FL_NO_ATA_1X | US_FL_NO_REPORT_OPCODES); |
c838ea46 AS |
483 | |
484 | p = quirks; | |
485 | while (*p) { | |
486 | /* Each entry consists of VID:PID:flags */ | |
487 | if (vid == simple_strtoul(p, &p, 16) && | |
488 | *p == ':' && | |
489 | pid == simple_strtoul(p+1, &p, 16) && | |
490 | *p == ':') | |
d4f373e5 | 491 | break; |
c838ea46 AS |
492 | |
493 | /* Move forward to the next entry */ | |
494 | while (*p) { | |
495 | if (*p++ == ',') | |
496 | break; | |
d4f373e5 AS |
497 | } |
498 | } | |
c838ea46 AS |
499 | if (!*p) /* No match */ |
500 | return; | |
501 | ||
502 | /* Collect the flags */ | |
503 | while (*++p && *p != ',') { | |
504 | switch (TOLOWER(*p)) { | |
505 | case 'a': | |
506 | f |= US_FL_SANE_SENSE; | |
507 | break; | |
a0bb1081 AS |
508 | case 'b': |
509 | f |= US_FL_BAD_SENSE; | |
510 | break; | |
c838ea46 AS |
511 | case 'c': |
512 | f |= US_FL_FIX_CAPACITY; | |
513 | break; | |
5116901d KR |
514 | case 'd': |
515 | f |= US_FL_NO_READ_DISC_INFO; | |
516 | break; | |
517 | case 'e': | |
518 | f |= US_FL_NO_READ_CAPACITY_16; | |
519 | break; | |
734016b0 HG |
520 | case 'f': |
521 | f |= US_FL_NO_REPORT_OPCODES; | |
522 | break; | |
c838ea46 AS |
523 | case 'h': |
524 | f |= US_FL_CAPACITY_HEURISTICS; | |
525 | break; | |
526 | case 'i': | |
527 | f |= US_FL_IGNORE_DEVICE; | |
528 | break; | |
529 | case 'l': | |
530 | f |= US_FL_NOT_LOCKABLE; | |
531 | break; | |
532 | case 'm': | |
533 | f |= US_FL_MAX_SECTORS_64; | |
534 | break; | |
21c13a4f AS |
535 | case 'n': |
536 | f |= US_FL_INITIAL_READ10; | |
537 | break; | |
c838ea46 AS |
538 | case 'o': |
539 | f |= US_FL_CAPACITY_OK; | |
540 | break; | |
eaa05dfc NJ |
541 | case 'p': |
542 | f |= US_FL_WRITE_CACHE; | |
543 | break; | |
c838ea46 AS |
544 | case 'r': |
545 | f |= US_FL_IGNORE_RESIDUE; | |
546 | break; | |
547 | case 's': | |
548 | f |= US_FL_SINGLE_LUN; | |
549 | break; | |
59307852 HG |
550 | case 't': |
551 | f |= US_FL_NO_ATA_1X; | |
552 | break; | |
d24d481b HG |
553 | case 'u': |
554 | f |= US_FL_IGNORE_UAS; | |
555 | break; | |
c838ea46 AS |
556 | case 'w': |
557 | f |= US_FL_NO_WP_DETECT; | |
558 | break; | |
559 | /* Ignore unrecognized flag characters */ | |
560 | } | |
561 | } | |
d24d481b | 562 | *fflags = (*fflags & ~mask) | f; |
d4f373e5 | 563 | } |
d24d481b | 564 | EXPORT_SYMBOL_GPL(usb_stor_adjust_quirks); |
d4f373e5 | 565 | |
1da177e4 | 566 | /* Get the unusual_devs entries and the string descriptors */ |
e6e244b6 AS |
567 | static int get_device_info(struct us_data *us, const struct usb_device_id *id, |
568 | struct us_unusual_dev *unusual_dev) | |
1da177e4 LT |
569 | { |
570 | struct usb_device *dev = us->pusb_dev; | |
571 | struct usb_interface_descriptor *idesc = | |
572 | &us->pusb_intf->cur_altsetting->desc; | |
cbd3af54 | 573 | struct device *pdev = &us->pusb_intf->dev; |
1da177e4 LT |
574 | |
575 | /* Store the entries */ | |
576 | us->unusual_dev = unusual_dev; | |
8fa7fd74 | 577 | us->subclass = (unusual_dev->useProtocol == USB_SC_DEVICE) ? |
1da177e4 LT |
578 | idesc->bInterfaceSubClass : |
579 | unusual_dev->useProtocol; | |
8fa7fd74 | 580 | us->protocol = (unusual_dev->useTransport == USB_PR_DEVICE) ? |
1da177e4 LT |
581 | idesc->bInterfaceProtocol : |
582 | unusual_dev->useTransport; | |
f61870ee | 583 | us->fflags = id->driver_info; |
d24d481b | 584 | usb_stor_adjust_quirks(us->pusb_dev, &us->fflags); |
1da177e4 | 585 | |
7e4d6c38 | 586 | if (us->fflags & US_FL_IGNORE_DEVICE) { |
cbd3af54 | 587 | dev_info(pdev, "device ignored\n"); |
3c332422 DD |
588 | return -ENODEV; |
589 | } | |
590 | ||
1da177e4 LT |
591 | /* |
592 | * This flag is only needed when we're in high-speed, so let's | |
593 | * disable it if we're in full-speed | |
594 | */ | |
595 | if (dev->speed != USB_SPEED_HIGH) | |
7e4d6c38 | 596 | us->fflags &= ~US_FL_GO_SLOW; |
1da177e4 | 597 | |
39f2f080 FC |
598 | if (us->fflags) |
599 | dev_info(pdev, "Quirks match for vid %04x pid %04x: %lx\n", | |
600 | le16_to_cpu(dev->descriptor.idVendor), | |
601 | le16_to_cpu(dev->descriptor.idProduct), | |
602 | us->fflags); | |
603 | ||
1da177e4 LT |
604 | /* Log a message if a non-generic unusual_dev entry contains an |
605 | * unnecessary subclass or protocol override. This may stimulate | |
606 | * reports from users that will help us remove unneeded entries | |
607 | * from the unusual_devs.h table. | |
608 | */ | |
609 | if (id->idVendor || id->idProduct) { | |
4c4c9432 | 610 | static const char *msgs[3] = { |
1da177e4 LT |
611 | "an unneeded SubClass entry", |
612 | "an unneeded Protocol entry", | |
613 | "unneeded SubClass and Protocol entries"}; | |
614 | struct usb_device_descriptor *ddesc = &dev->descriptor; | |
615 | int msg = -1; | |
616 | ||
8fa7fd74 | 617 | if (unusual_dev->useProtocol != USB_SC_DEVICE && |
1da177e4 LT |
618 | us->subclass == idesc->bInterfaceSubClass) |
619 | msg += 1; | |
8fa7fd74 | 620 | if (unusual_dev->useTransport != USB_PR_DEVICE && |
1da177e4 LT |
621 | us->protocol == idesc->bInterfaceProtocol) |
622 | msg += 2; | |
7e4d6c38 | 623 | if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE)) |
cbd3af54 FC |
624 | dev_notice(pdev, "This device " |
625 | "(%04x,%04x,%04x S %02x P %02x)" | |
626 | " has %s in unusual_devs.h (kernel" | |
627 | " %s)\n" | |
628 | " Please send a copy of this message to " | |
629 | "<linux-usb@vger.kernel.org> and " | |
630 | "<usb-storage@lists.one-eyed-alien.net>\n", | |
631 | le16_to_cpu(ddesc->idVendor), | |
632 | le16_to_cpu(ddesc->idProduct), | |
633 | le16_to_cpu(ddesc->bcdDevice), | |
634 | idesc->bInterfaceSubClass, | |
635 | idesc->bInterfaceProtocol, | |
636 | msgs[msg], | |
637 | utsname()->release); | |
1da177e4 | 638 | } |
3c332422 DD |
639 | |
640 | return 0; | |
1da177e4 LT |
641 | } |
642 | ||
643 | /* Get the transport settings */ | |
e6e244b6 | 644 | static void get_transport(struct us_data *us) |
1da177e4 LT |
645 | { |
646 | switch (us->protocol) { | |
8fa7fd74 | 647 | case USB_PR_CB: |
1da177e4 LT |
648 | us->transport_name = "Control/Bulk"; |
649 | us->transport = usb_stor_CB_transport; | |
650 | us->transport_reset = usb_stor_CB_reset; | |
651 | us->max_lun = 7; | |
652 | break; | |
653 | ||
8fa7fd74 | 654 | case USB_PR_CBI: |
1da177e4 | 655 | us->transport_name = "Control/Bulk/Interrupt"; |
64648a9d | 656 | us->transport = usb_stor_CB_transport; |
1da177e4 LT |
657 | us->transport_reset = usb_stor_CB_reset; |
658 | us->max_lun = 7; | |
659 | break; | |
660 | ||
8fa7fd74 | 661 | case USB_PR_BULK: |
1da177e4 LT |
662 | us->transport_name = "Bulk"; |
663 | us->transport = usb_stor_Bulk_transport; | |
664 | us->transport_reset = usb_stor_Bulk_reset; | |
665 | break; | |
1da177e4 | 666 | } |
1da177e4 LT |
667 | } |
668 | ||
669 | /* Get the protocol settings */ | |
e6e244b6 | 670 | static void get_protocol(struct us_data *us) |
1da177e4 LT |
671 | { |
672 | switch (us->subclass) { | |
8fa7fd74 | 673 | case USB_SC_RBC: |
1da177e4 LT |
674 | us->protocol_name = "Reduced Block Commands (RBC)"; |
675 | us->proto_handler = usb_stor_transparent_scsi_command; | |
676 | break; | |
677 | ||
8fa7fd74 | 678 | case USB_SC_8020: |
1da177e4 | 679 | us->protocol_name = "8020i"; |
3dae5345 | 680 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
681 | us->max_lun = 0; |
682 | break; | |
683 | ||
8fa7fd74 | 684 | case USB_SC_QIC: |
1da177e4 | 685 | us->protocol_name = "QIC-157"; |
3dae5345 | 686 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
687 | us->max_lun = 0; |
688 | break; | |
689 | ||
8fa7fd74 | 690 | case USB_SC_8070: |
1da177e4 | 691 | us->protocol_name = "8070i"; |
3dae5345 | 692 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
693 | us->max_lun = 0; |
694 | break; | |
695 | ||
8fa7fd74 | 696 | case USB_SC_SCSI: |
1da177e4 LT |
697 | us->protocol_name = "Transparent SCSI"; |
698 | us->proto_handler = usb_stor_transparent_scsi_command; | |
699 | break; | |
700 | ||
8fa7fd74 | 701 | case USB_SC_UFI: |
1da177e4 LT |
702 | us->protocol_name = "Uniform Floppy Interface (UFI)"; |
703 | us->proto_handler = usb_stor_ufi_command; | |
704 | break; | |
1da177e4 | 705 | } |
1da177e4 LT |
706 | } |
707 | ||
708 | /* Get the pipe settings */ | |
709 | static int get_pipes(struct us_data *us) | |
710 | { | |
711 | struct usb_host_interface *altsetting = | |
712 | us->pusb_intf->cur_altsetting; | |
713 | int i; | |
714 | struct usb_endpoint_descriptor *ep; | |
715 | struct usb_endpoint_descriptor *ep_in = NULL; | |
716 | struct usb_endpoint_descriptor *ep_out = NULL; | |
717 | struct usb_endpoint_descriptor *ep_int = NULL; | |
718 | ||
719 | /* | |
1096f780 | 720 | * Find the first endpoint of each type we need. |
1da177e4 | 721 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
1096f780 | 722 | * An optional interrupt-in is OK (necessary for CBI protocol). |
1da177e4 LT |
723 | * We will ignore any others. |
724 | */ | |
725 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { | |
726 | ep = &altsetting->endpoint[i].desc; | |
727 | ||
04720747 | 728 | if (usb_endpoint_xfer_bulk(ep)) { |
1096f780 AS |
729 | if (usb_endpoint_dir_in(ep)) { |
730 | if (!ep_in) | |
731 | ep_in = ep; | |
732 | } else { | |
733 | if (!ep_out) | |
734 | ep_out = ep; | |
735 | } | |
1da177e4 LT |
736 | } |
737 | ||
1096f780 AS |
738 | else if (usb_endpoint_is_int_in(ep)) { |
739 | if (!ep_int) | |
740 | ep_int = ep; | |
1da177e4 LT |
741 | } |
742 | } | |
743 | ||
8fa7fd74 | 744 | if (!ep_in || !ep_out || (us->protocol == USB_PR_CBI && !ep_int)) { |
191648d0 | 745 | usb_stor_dbg(us, "Endpoint sanity check failed! Rejecting dev.\n"); |
1da177e4 LT |
746 | return -EIO; |
747 | } | |
748 | ||
749 | /* Calculate and store the pipe values */ | |
750 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); | |
751 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); | |
752 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, | |
2e0fe709 | 753 | usb_endpoint_num(ep_out)); |
a1631062 | 754 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, |
2e0fe709 | 755 | usb_endpoint_num(ep_in)); |
1da177e4 LT |
756 | if (ep_int) { |
757 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, | |
2e0fe709 | 758 | usb_endpoint_num(ep_int)); |
1da177e4 LT |
759 | us->ep_bInterval = ep_int->bInterval; |
760 | } | |
761 | return 0; | |
762 | } | |
763 | ||
764 | /* Initialize all the dynamic resources we need */ | |
765 | static int usb_stor_acquire_resources(struct us_data *us) | |
766 | { | |
767 | int p; | |
3f13e66e | 768 | struct task_struct *th; |
1da177e4 LT |
769 | |
770 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); | |
771 | if (!us->current_urb) { | |
191648d0 | 772 | usb_stor_dbg(us, "URB allocation failed\n"); |
1da177e4 LT |
773 | return -ENOMEM; |
774 | } | |
775 | ||
1da177e4 LT |
776 | /* Just before we start our control thread, initialize |
777 | * the device if it needs initialization */ | |
b876aef7 AS |
778 | if (us->unusual_dev->initFunction) { |
779 | p = us->unusual_dev->initFunction(us); | |
780 | if (p) | |
781 | return p; | |
782 | } | |
1da177e4 LT |
783 | |
784 | /* Start up our control thread */ | |
ed76cacb | 785 | th = kthread_run(usb_stor_control_thread, us, "usb-storage"); |
3f13e66e | 786 | if (IS_ERR(th)) { |
cbd3af54 FC |
787 | dev_warn(&us->pusb_intf->dev, |
788 | "Unable to start control thread\n"); | |
3f13e66e | 789 | return PTR_ERR(th); |
1da177e4 | 790 | } |
ed76cacb | 791 | us->ctl_thread = th; |
1da177e4 LT |
792 | |
793 | return 0; | |
794 | } | |
795 | ||
796 | /* Release all our dynamic resources */ | |
797 | static void usb_stor_release_resources(struct us_data *us) | |
798 | { | |
1da177e4 | 799 | /* Tell the control thread to exit. The SCSI host must |
543f7810 AS |
800 | * already have been removed and the DISCONNECTING flag set |
801 | * so that we won't accept any more commands. | |
1da177e4 | 802 | */ |
191648d0 | 803 | usb_stor_dbg(us, "-- sending exit command to thread\n"); |
7119e3c3 | 804 | complete(&us->cmnd_ready); |
ed76cacb AS |
805 | if (us->ctl_thread) |
806 | kthread_stop(us->ctl_thread); | |
1da177e4 LT |
807 | |
808 | /* Call the destructor routine, if it exists */ | |
809 | if (us->extra_destructor) { | |
191648d0 | 810 | usb_stor_dbg(us, "-- calling extra_destructor()\n"); |
1da177e4 LT |
811 | us->extra_destructor(us->extra); |
812 | } | |
813 | ||
814 | /* Free the extra data and the URB */ | |
815 | kfree(us->extra); | |
816 | usb_free_urb(us->current_urb); | |
817 | } | |
818 | ||
819 | /* Dissociate from the USB device */ | |
820 | static void dissociate_dev(struct us_data *us) | |
821 | { | |
0ede76fc AS |
822 | /* Free the buffers */ |
823 | kfree(us->cr); | |
997ea58e | 824 | usb_free_coherent(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, us->iobuf_dma); |
1da177e4 LT |
825 | |
826 | /* Remove our private data from the interface */ | |
827 | usb_set_intfdata(us->pusb_intf, NULL); | |
828 | } | |
829 | ||
543f7810 AS |
830 | /* First stage of disconnect processing: stop SCSI scanning, |
831 | * remove the host, and stop accepting new commands | |
832 | */ | |
77f46328 MD |
833 | static void quiesce_and_remove_host(struct us_data *us) |
834 | { | |
eecd11ed AS |
835 | struct Scsi_Host *host = us_to_host(us); |
836 | ||
543f7810 | 837 | /* If the device is really gone, cut short reset delays */ |
bb94a406 | 838 | if (us->pusb_dev->state == USB_STATE_NOTATTACHED) { |
543f7810 | 839 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); |
bb94a406 AS |
840 | wake_up(&us->delay_wait); |
841 | } | |
77f46328 | 842 | |
bb94a406 AS |
843 | /* Prevent SCSI scanning (if it hasn't started yet) |
844 | * or wait for the SCSI-scanning routine to stop. | |
543f7810 | 845 | */ |
bb94a406 AS |
846 | cancel_delayed_work_sync(&us->scan_dwork); |
847 | ||
848 | /* Balance autopm calls if scanning was cancelled */ | |
849 | if (test_bit(US_FLIDX_SCAN_PENDING, &us->dflags)) | |
850 | usb_autopm_put_interface_no_suspend(us->pusb_intf); | |
26186ba7 | 851 | |
543f7810 AS |
852 | /* Removing the host will perform an orderly shutdown: caches |
853 | * synchronized, disks spun down, etc. | |
854 | */ | |
eecd11ed | 855 | scsi_remove_host(host); |
2f67cd5b | 856 | |
543f7810 AS |
857 | /* Prevent any new commands from being accepted and cut short |
858 | * reset delays. | |
859 | */ | |
860 | scsi_lock(host); | |
861 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); | |
862 | scsi_unlock(host); | |
863 | wake_up(&us->delay_wait); | |
77f46328 MD |
864 | } |
865 | ||
866 | /* Second stage of disconnect processing: deallocate all resources */ | |
867 | static void release_everything(struct us_data *us) | |
868 | { | |
869 | usb_stor_release_resources(us); | |
870 | dissociate_dev(us); | |
871 | ||
872 | /* Drop our reference to the host; the SCSI core will free it | |
873 | * (and "us" along with it) when the refcount becomes 0. */ | |
874 | scsi_host_put(us_to_host(us)); | |
875 | } | |
876 | ||
bb94a406 AS |
877 | /* Delayed-work routine to carry out SCSI-device scanning */ |
878 | static void usb_stor_scan_dwork(struct work_struct *work) | |
1da177e4 | 879 | { |
bb94a406 AS |
880 | struct us_data *us = container_of(work, struct us_data, |
881 | scan_dwork.work); | |
cbd3af54 | 882 | struct device *dev = &us->pusb_intf->dev; |
1da177e4 | 883 | |
bb94a406 | 884 | dev_dbg(dev, "starting scan\n"); |
ec012476 | 885 | |
bb94a406 | 886 | /* For bulk-only devices, determine the max LUN value */ |
646a3843 MK |
887 | if (us->protocol == USB_PR_BULK && |
888 | !(us->fflags & US_FL_SINGLE_LUN) && | |
889 | !(us->fflags & US_FL_SCM_MULT_TARG)) { | |
bb94a406 AS |
890 | mutex_lock(&us->dev_mutex); |
891 | us->max_lun = usb_stor_Bulk_max_lun(us); | |
ec371326 ON |
892 | /* |
893 | * Allow proper scanning of devices that present more than 8 LUNs | |
894 | * While not affecting other devices that may need the previous behavior | |
895 | */ | |
896 | if (us->max_lun >= 8) | |
897 | us_to_host(us)->max_lun = us->max_lun+1; | |
bb94a406 | 898 | mutex_unlock(&us->dev_mutex); |
1da177e4 | 899 | } |
bb94a406 AS |
900 | scsi_scan_host(us_to_host(us)); |
901 | dev_dbg(dev, "scan complete\n"); | |
1da177e4 | 902 | |
bb94a406 | 903 | /* Should we unbind if no devices were detected? */ |
1da177e4 | 904 | |
f283925f | 905 | usb_autopm_put_interface(us->pusb_intf); |
bb94a406 | 906 | clear_bit(US_FLIDX_SCAN_PENDING, &us->dflags); |
1da177e4 LT |
907 | } |
908 | ||
4c1bd3d7 DV |
909 | static unsigned int usb_stor_sg_tablesize(struct usb_interface *intf) |
910 | { | |
911 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
912 | ||
913 | if (usb_dev->bus->sg_tablesize) { | |
914 | return usb_dev->bus->sg_tablesize; | |
915 | } | |
916 | return SG_ALL; | |
917 | } | |
1da177e4 | 918 | |
e6e244b6 AS |
919 | /* First part of general USB mass-storage probing */ |
920 | int usb_stor_probe1(struct us_data **pus, | |
921 | struct usb_interface *intf, | |
922 | const struct usb_device_id *id, | |
923 | struct us_unusual_dev *unusual_dev) | |
1da177e4 LT |
924 | { |
925 | struct Scsi_Host *host; | |
926 | struct us_data *us; | |
1da177e4 | 927 | int result; |
a00828e9 | 928 | |
191648d0 | 929 | dev_info(&intf->dev, "USB Mass Storage device detected\n"); |
1da177e4 LT |
930 | |
931 | /* | |
932 | * Ask the SCSI layer to allocate a host structure, with extra | |
933 | * space at the end for our private us_data structure. | |
934 | */ | |
935 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); | |
936 | if (!host) { | |
191648d0 | 937 | dev_warn(&intf->dev, "Unable to allocate the scsi host\n"); |
1da177e4 LT |
938 | return -ENOMEM; |
939 | } | |
940 | ||
17f06022 RS |
941 | /* |
942 | * Allow 16-byte CDBs and thus > 2TB | |
943 | */ | |
944 | host->max_cmd_len = 16; | |
4c1bd3d7 | 945 | host->sg_tablesize = usb_stor_sg_tablesize(intf); |
e6e244b6 | 946 | *pus = us = host_to_us(host); |
4186ecf8 | 947 | mutex_init(&(us->dev_mutex)); |
c825bab0 | 948 | us_set_lock_class(&us->dev_mutex, intf); |
7119e3c3 | 949 | init_completion(&us->cmnd_ready); |
1da177e4 LT |
950 | init_completion(&(us->notify)); |
951 | init_waitqueue_head(&us->delay_wait); | |
bb94a406 | 952 | INIT_DELAYED_WORK(&us->scan_dwork, usb_stor_scan_dwork); |
1da177e4 LT |
953 | |
954 | /* Associate the us_data structure with the USB device */ | |
955 | result = associate_dev(us, intf); | |
956 | if (result) | |
957 | goto BadDevice; | |
958 | ||
e6e244b6 AS |
959 | /* Get the unusual_devs entries and the descriptors */ |
960 | result = get_device_info(us, id, unusual_dev); | |
3c332422 DD |
961 | if (result) |
962 | goto BadDevice; | |
1da177e4 | 963 | |
e6e244b6 AS |
964 | /* Get standard transport and protocol settings */ |
965 | get_transport(us); | |
966 | get_protocol(us); | |
967 | ||
968 | /* Give the caller a chance to fill in specialized transport | |
969 | * or protocol settings. | |
970 | */ | |
971 | return 0; | |
972 | ||
973 | BadDevice: | |
191648d0 | 974 | usb_stor_dbg(us, "storage_probe() failed\n"); |
e6e244b6 AS |
975 | release_everything(us); |
976 | return result; | |
977 | } | |
978 | EXPORT_SYMBOL_GPL(usb_stor_probe1); | |
979 | ||
980 | /* Second part of general USB mass-storage probing */ | |
981 | int usb_stor_probe2(struct us_data *us) | |
982 | { | |
e6e244b6 | 983 | int result; |
cbd3af54 | 984 | struct device *dev = &us->pusb_intf->dev; |
e6e244b6 AS |
985 | |
986 | /* Make sure the transport and protocol have both been set */ | |
987 | if (!us->transport || !us->proto_handler) { | |
988 | result = -ENXIO; | |
1da177e4 | 989 | goto BadDevice; |
e6e244b6 | 990 | } |
191648d0 JP |
991 | usb_stor_dbg(us, "Transport: %s\n", us->transport_name); |
992 | usb_stor_dbg(us, "Protocol: %s\n", us->protocol_name); | |
e6e244b6 | 993 | |
646a3843 MK |
994 | if (us->fflags & US_FL_SCM_MULT_TARG) { |
995 | /* | |
996 | * SCM eUSCSI bridge devices can have different numbers | |
997 | * of LUNs on different targets; allow all to be probed. | |
998 | */ | |
999 | us->max_lun = 7; | |
1000 | /* The eUSCSI itself has ID 7, so avoid scanning that */ | |
1001 | us_to_host(us)->this_id = 7; | |
1002 | /* max_id is 8 initially, so no need to set it here */ | |
1003 | } else { | |
1004 | /* In the normal case there is only a single target */ | |
1005 | us_to_host(us)->max_id = 1; | |
1006 | /* | |
1007 | * Like Windows, we won't store the LUN bits in CDB[1] for | |
1008 | * SCSI-2 devices using the Bulk-Only transport (even though | |
1009 | * this violates the SCSI spec). | |
1010 | */ | |
1011 | if (us->transport == usb_stor_Bulk_transport) | |
1012 | us_to_host(us)->no_scsi2_lun_in_cdb = 1; | |
1013 | } | |
1014 | ||
e6e244b6 AS |
1015 | /* fix for single-lun devices */ |
1016 | if (us->fflags & US_FL_SINGLE_LUN) | |
1017 | us->max_lun = 0; | |
1018 | ||
1019 | /* Find the endpoints and calculate pipe values */ | |
1da177e4 LT |
1020 | result = get_pipes(us); |
1021 | if (result) | |
1022 | goto BadDevice; | |
1023 | ||
21c13a4f AS |
1024 | /* |
1025 | * If the device returns invalid data for the first READ(10) | |
1026 | * command, indicate the command should be retried. | |
1027 | */ | |
1028 | if (us->fflags & US_FL_INITIAL_READ10) | |
1029 | set_bit(US_FLIDX_REDO_READ10, &us->dflags); | |
1030 | ||
1da177e4 LT |
1031 | /* Acquire all the other resources and add the host */ |
1032 | result = usb_stor_acquire_resources(us); | |
1033 | if (result) | |
1034 | goto BadDevice; | |
00fa43ef MW |
1035 | snprintf(us->scsi_name, sizeof(us->scsi_name), "usb-storage %s", |
1036 | dev_name(&us->pusb_intf->dev)); | |
cbd3af54 | 1037 | result = scsi_add_host(us_to_host(us), dev); |
1da177e4 | 1038 | if (result) { |
cbd3af54 FC |
1039 | dev_warn(dev, |
1040 | "Unable to add the scsi host\n"); | |
1da177e4 LT |
1041 | goto BadDevice; |
1042 | } | |
1043 | ||
bb94a406 | 1044 | /* Submit the delayed_work for SCSI-device scanning */ |
f283925f | 1045 | usb_autopm_get_interface_no_resume(us->pusb_intf); |
bb94a406 | 1046 | set_bit(US_FLIDX_SCAN_PENDING, &us->dflags); |
1da177e4 | 1047 | |
bb94a406 AS |
1048 | if (delay_use > 0) |
1049 | dev_dbg(dev, "waiting for device to settle before scanning\n"); | |
1050 | queue_delayed_work(system_freezable_wq, &us->scan_dwork, | |
1051 | delay_use * HZ); | |
1da177e4 LT |
1052 | return 0; |
1053 | ||
1054 | /* We come here if there are any problems */ | |
1055 | BadDevice: | |
191648d0 | 1056 | usb_stor_dbg(us, "storage_probe() failed\n"); |
77f46328 | 1057 | release_everything(us); |
1da177e4 LT |
1058 | return result; |
1059 | } | |
e6e244b6 | 1060 | EXPORT_SYMBOL_GPL(usb_stor_probe2); |
1da177e4 | 1061 | |
e6e244b6 AS |
1062 | /* Handle a USB mass-storage disconnect */ |
1063 | void usb_stor_disconnect(struct usb_interface *intf) | |
1da177e4 LT |
1064 | { |
1065 | struct us_data *us = usb_get_intfdata(intf); | |
1066 | ||
77f46328 MD |
1067 | quiesce_and_remove_host(us); |
1068 | release_everything(us); | |
1da177e4 | 1069 | } |
e6e244b6 AS |
1070 | EXPORT_SYMBOL_GPL(usb_stor_disconnect); |
1071 | ||
1072 | /* The main probe routine for standard devices */ | |
1073 | static int storage_probe(struct usb_interface *intf, | |
1074 | const struct usb_device_id *id) | |
1075 | { | |
fd7ff36d | 1076 | struct us_unusual_dev *unusual_dev; |
e6e244b6 AS |
1077 | struct us_data *us; |
1078 | int result; | |
fd7ff36d | 1079 | int size; |
e6e244b6 | 1080 | |
5bfd5b5d HG |
1081 | /* If uas is enabled and this device can do uas then ignore it. */ |
1082 | #if IS_ENABLED(CONFIG_USB_UAS) | |
1083 | if (uas_use_uas_driver(intf, id)) | |
1084 | return -ENXIO; | |
1085 | #endif | |
1086 | ||
e6e244b6 | 1087 | /* |
e6e244b6 AS |
1088 | * If the device isn't standard (is handled by a subdriver |
1089 | * module) then don't accept it. | |
1090 | */ | |
f61870ee | 1091 | if (usb_usual_ignore_device(intf)) |
e6e244b6 AS |
1092 | return -ENXIO; |
1093 | ||
1094 | /* | |
1095 | * Call the general probe procedures. | |
1096 | * | |
1097 | * The unusual_dev_list array is parallel to the usb_storage_usb_ids | |
1098 | * table, so we use the index of the id entry to find the | |
1099 | * corresponding unusual_devs entry. | |
1100 | */ | |
fd7ff36d HL |
1101 | |
1102 | size = ARRAY_SIZE(us_unusual_dev_list); | |
1103 | if (id >= usb_storage_usb_ids && id < usb_storage_usb_ids + size) { | |
1104 | unusual_dev = (id - usb_storage_usb_ids) + us_unusual_dev_list; | |
1105 | } else { | |
1106 | unusual_dev = &for_dynamic_ids; | |
1107 | ||
191648d0 | 1108 | dev_dbg(&intf->dev, "Use Bulk-Only transport with the Transparent SCSI protocol for dynamic id: 0x%04x 0x%04x\n", |
fd7ff36d HL |
1109 | id->idVendor, id->idProduct); |
1110 | } | |
1111 | ||
1112 | result = usb_stor_probe1(&us, intf, id, unusual_dev); | |
e6e244b6 AS |
1113 | if (result) |
1114 | return result; | |
1115 | ||
1116 | /* No special transport or protocol settings in the main module */ | |
1117 | ||
1118 | result = usb_stor_probe2(us); | |
1119 | return result; | |
1120 | } | |
1da177e4 | 1121 | |
ce2596df | 1122 | static struct usb_driver usb_storage_driver = { |
ce2596df AS |
1123 | .name = "usb-storage", |
1124 | .probe = storage_probe, | |
e6e244b6 AS |
1125 | .disconnect = usb_stor_disconnect, |
1126 | .suspend = usb_stor_suspend, | |
1127 | .resume = usb_stor_resume, | |
1128 | .reset_resume = usb_stor_reset_resume, | |
1129 | .pre_reset = usb_stor_pre_reset, | |
1130 | .post_reset = usb_stor_post_reset, | |
1131 | .id_table = usb_storage_usb_ids, | |
f283925f | 1132 | .supports_autosuspend = 1, |
543f7810 | 1133 | .soft_unbind = 1, |
ce2596df AS |
1134 | }; |
1135 | ||
4601de80 | 1136 | module_usb_driver(usb_storage_driver); |