Commit | Line | Data |
---|---|---|
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 LT |
55 | #include <linux/module.h> |
56 | #include <linux/init.h> | |
57 | #include <linux/slab.h> | |
3f13e66e | 58 | #include <linux/kthread.h> |
4186ecf8 | 59 | #include <linux/mutex.h> |
00f8b0c1 | 60 | #include <linux/utsname.h> |
1da177e4 LT |
61 | |
62 | #include <scsi/scsi.h> | |
63 | #include <scsi/scsi_cmnd.h> | |
64 | #include <scsi/scsi_device.h> | |
65 | ||
66 | #include "usb.h" | |
67 | #include "scsiglue.h" | |
68 | #include "transport.h" | |
69 | #include "protocol.h" | |
70 | #include "debug.h" | |
71 | #include "initializers.h" | |
72 | ||
32fe5e39 | 73 | #include "sierra_ms.h" |
281b064f | 74 | #include "option_ms.h" |
1da177e4 LT |
75 | |
76 | /* Some informational data */ | |
77 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); | |
78 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); | |
79 | MODULE_LICENSE("GPL"); | |
80 | ||
a4a47bc0 | 81 | static unsigned int delay_use = 1; |
1da177e4 LT |
82 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); |
83 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); | |
84 | ||
c838ea46 AS |
85 | static char quirks[128]; |
86 | module_param_string(quirks, quirks, sizeof(quirks), S_IRUGO | S_IWUSR); | |
d4f373e5 AS |
87 | MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks"); |
88 | ||
1da177e4 | 89 | |
a00828e9 PZ |
90 | /* |
91 | * The entries in this table correspond, line for line, | |
e6e244b6 | 92 | * with the entries in usb_storage_usb_ids[], defined in usual-tables.c. |
1da177e4 | 93 | */ |
1da177e4 LT |
94 | |
95 | /* The vendor name should be kept at eight characters or less, and | |
96 | * the product name should be kept at 16 characters or less. If a device | |
97 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names | |
98 | * normally generated by a device thorugh the INQUIRY response will be | |
99 | * taken from this list, and this is the reason for the above size | |
100 | * restriction. However, if the flag is not present, then you | |
101 | * are free to use as many characters as you like. | |
102 | */ | |
103 | ||
1da177e4 LT |
104 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
105 | vendor_name, product_name, use_protocol, use_transport, \ | |
106 | init_function, Flags) \ | |
107 | { \ | |
108 | .vendorName = vendor_name, \ | |
109 | .productName = product_name, \ | |
110 | .useProtocol = use_protocol, \ | |
111 | .useTransport = use_transport, \ | |
112 | .initFunction = init_function, \ | |
a00828e9 PZ |
113 | } |
114 | ||
25ff1c31 AS |
115 | #define COMPLIANT_DEV UNUSUAL_DEV |
116 | ||
a00828e9 PZ |
117 | #define USUAL_DEV(use_protocol, use_transport, use_type) \ |
118 | { \ | |
119 | .useProtocol = use_protocol, \ | |
120 | .useTransport = use_transport, \ | |
1da177e4 LT |
121 | } |
122 | ||
123 | static struct us_unusual_dev us_unusual_dev_list[] = { | |
a1631062 | 124 | # include "unusual_devs.h" |
e6e244b6 | 125 | { } /* Terminating entry */ |
1da177e4 LT |
126 | }; |
127 | ||
fd7ff36d HL |
128 | static struct us_unusual_dev for_dynamic_ids = |
129 | USUAL_DEV(USB_SC_SCSI, USB_PR_BULK, 0); | |
130 | ||
e6e244b6 AS |
131 | #undef UNUSUAL_DEV |
132 | #undef COMPLIANT_DEV | |
133 | #undef USUAL_DEV | |
134 | ||
c825bab0 ML |
135 | #ifdef CONFIG_LOCKDEP |
136 | ||
137 | static struct lock_class_key us_interface_key[USB_MAXINTERFACES]; | |
138 | ||
139 | static void us_set_lock_class(struct mutex *mutex, | |
140 | struct usb_interface *intf) | |
141 | { | |
142 | struct usb_device *udev = interface_to_usbdev(intf); | |
143 | struct usb_host_config *config = udev->actconfig; | |
144 | int i; | |
145 | ||
146 | for (i = 0; i < config->desc.bNumInterfaces; i++) { | |
147 | if (config->interface[i] == intf) | |
148 | break; | |
149 | } | |
150 | ||
151 | BUG_ON(i == config->desc.bNumInterfaces); | |
152 | ||
153 | lockdep_set_class(mutex, &us_interface_key[i]); | |
154 | } | |
155 | ||
156 | #else | |
157 | ||
158 | static void us_set_lock_class(struct mutex *mutex, | |
159 | struct usb_interface *intf) | |
160 | { | |
161 | } | |
162 | ||
163 | #endif | |
ce2596df AS |
164 | |
165 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ | |
166 | ||
e6e244b6 | 167 | int usb_stor_suspend(struct usb_interface *iface, pm_message_t message) |
ce2596df AS |
168 | { |
169 | struct us_data *us = usb_get_intfdata(iface); | |
170 | ||
171 | /* Wait until no command is running */ | |
4186ecf8 | 172 | mutex_lock(&us->dev_mutex); |
ce2596df | 173 | |
441b62c1 | 174 | US_DEBUGP("%s\n", __func__); |
7931e1c6 MD |
175 | if (us->suspend_resume_hook) |
176 | (us->suspend_resume_hook)(us, US_SUSPEND); | |
ce2596df | 177 | |
d526875d GKH |
178 | /* When runtime PM is working, we'll set a flag to indicate |
179 | * whether we should autoresume when a SCSI request arrives. */ | |
180 | ||
4186ecf8 | 181 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
182 | return 0; |
183 | } | |
e6e244b6 | 184 | EXPORT_SYMBOL_GPL(usb_stor_suspend); |
ce2596df | 185 | |
e6e244b6 | 186 | int usb_stor_resume(struct usb_interface *iface) |
ce2596df AS |
187 | { |
188 | struct us_data *us = usb_get_intfdata(iface); | |
189 | ||
d526875d | 190 | mutex_lock(&us->dev_mutex); |
8dfe4b14 | 191 | |
441b62c1 | 192 | US_DEBUGP("%s\n", __func__); |
7931e1c6 MD |
193 | if (us->suspend_resume_hook) |
194 | (us->suspend_resume_hook)(us, US_RESUME); | |
ce2596df | 195 | |
d526875d | 196 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
197 | return 0; |
198 | } | |
e6e244b6 | 199 | EXPORT_SYMBOL_GPL(usb_stor_resume); |
ce2596df | 200 | |
e6e244b6 | 201 | int usb_stor_reset_resume(struct usb_interface *iface) |
f07600cf AS |
202 | { |
203 | struct us_data *us = usb_get_intfdata(iface); | |
204 | ||
441b62c1 | 205 | US_DEBUGP("%s\n", __func__); |
f07600cf AS |
206 | |
207 | /* Report the reset to the SCSI core */ | |
208 | usb_stor_report_bus_reset(us); | |
209 | ||
210 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
211 | * the device */ | |
212 | return 0; | |
213 | } | |
e6e244b6 | 214 | EXPORT_SYMBOL_GPL(usb_stor_reset_resume); |
f07600cf | 215 | |
ce2596df | 216 | #endif /* CONFIG_PM */ |
1da177e4 | 217 | |
47104b0d AS |
218 | /* |
219 | * The next two routines get called just before and just after | |
220 | * a USB port reset, whether from this driver or a different one. | |
221 | */ | |
222 | ||
e6e244b6 | 223 | int usb_stor_pre_reset(struct usb_interface *iface) |
47104b0d AS |
224 | { |
225 | struct us_data *us = usb_get_intfdata(iface); | |
226 | ||
441b62c1 | 227 | US_DEBUGP("%s\n", __func__); |
47104b0d AS |
228 | |
229 | /* Make sure no command runs during the reset */ | |
230 | mutex_lock(&us->dev_mutex); | |
f07600cf | 231 | return 0; |
47104b0d | 232 | } |
e6e244b6 | 233 | EXPORT_SYMBOL_GPL(usb_stor_pre_reset); |
47104b0d | 234 | |
e6e244b6 | 235 | int usb_stor_post_reset(struct usb_interface *iface) |
47104b0d AS |
236 | { |
237 | struct us_data *us = usb_get_intfdata(iface); | |
238 | ||
441b62c1 | 239 | US_DEBUGP("%s\n", __func__); |
47104b0d AS |
240 | |
241 | /* Report the reset to the SCSI core */ | |
47104b0d | 242 | usb_stor_report_bus_reset(us); |
47104b0d AS |
243 | |
244 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
245 | * the device */ | |
0458d5b4 | 246 | |
f07600cf AS |
247 | mutex_unlock(&us->dev_mutex); |
248 | return 0; | |
47104b0d | 249 | } |
e6e244b6 | 250 | EXPORT_SYMBOL_GPL(usb_stor_post_reset); |
47104b0d | 251 | |
1da177e4 LT |
252 | /* |
253 | * fill_inquiry_response takes an unsigned char array (which must | |
254 | * be at least 36 characters) and populates the vendor name, | |
255 | * product name, and revision fields. Then the array is copied | |
256 | * into the SCSI command's response buffer (oddly enough | |
257 | * called request_buffer). data_len contains the length of the | |
258 | * data array, which again must be at least 36. | |
259 | */ | |
260 | ||
261 | void fill_inquiry_response(struct us_data *us, unsigned char *data, | |
262 | unsigned int data_len) | |
263 | { | |
a1631062 | 264 | if (data_len < 36) /* You lose. */ |
1da177e4 LT |
265 | return; |
266 | ||
f3f6faa9 | 267 | memset(data+8, ' ', 28); |
db2c8624 | 268 | if (data[0]&0x20) { /* USB device currently not connected. Return |
1da177e4 LT |
269 | peripheral qualifier 001b ("...however, the |
270 | physical device is not currently connected | |
271 | to this logical unit") and leave vendor and | |
272 | product identification empty. ("If the target | |
273 | does store some of the INQUIRY data on the | |
a1631062 | 274 | device, it may return zeros or ASCII spaces |
1da177e4 LT |
275 | (20h) in those fields until the data is |
276 | available from the device."). */ | |
1da177e4 LT |
277 | } else { |
278 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); | |
f3f6faa9 AS |
279 | int n; |
280 | ||
281 | n = strlen(us->unusual_dev->vendorName); | |
282 | memcpy(data+8, us->unusual_dev->vendorName, min(8, n)); | |
283 | n = strlen(us->unusual_dev->productName); | |
284 | memcpy(data+16, us->unusual_dev->productName, min(16, n)); | |
285 | ||
1da177e4 LT |
286 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); |
287 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); | |
288 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); | |
289 | data[35] = 0x30 + ((bcdDevice) & 0x0F); | |
290 | } | |
291 | ||
292 | usb_stor_set_xfer_buf(data, data_len, us->srb); | |
293 | } | |
e6e244b6 | 294 | EXPORT_SYMBOL_GPL(fill_inquiry_response); |
1da177e4 LT |
295 | |
296 | static int usb_stor_control_thread(void * __us) | |
297 | { | |
298 | struct us_data *us = (struct us_data *)__us; | |
299 | struct Scsi_Host *host = us_to_host(us); | |
300 | ||
db2c8624 | 301 | for (;;) { |
1da177e4 | 302 | US_DEBUGP("*** thread sleeping.\n"); |
7119e3c3 | 303 | if (wait_for_completion_interruptible(&us->cmnd_ready)) |
1da177e4 | 304 | break; |
7119e3c3 | 305 | |
1da177e4 LT |
306 | US_DEBUGP("*** thread awakened.\n"); |
307 | ||
308 | /* lock the device pointers */ | |
4186ecf8 | 309 | mutex_lock(&(us->dev_mutex)); |
1da177e4 | 310 | |
543f7810 AS |
311 | /* lock access to the state */ |
312 | scsi_lock(host); | |
313 | ||
314 | /* When we are called with no command pending, we're done */ | |
315 | if (us->srb == NULL) { | |
316 | scsi_unlock(host); | |
4186ecf8 | 317 | mutex_unlock(&us->dev_mutex); |
543f7810 | 318 | US_DEBUGP("-- exiting\n"); |
1da177e4 LT |
319 | break; |
320 | } | |
321 | ||
1da177e4 | 322 | /* has the command timed out *already* ? */ |
7e4d6c38 | 323 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
324 | us->srb->result = DID_ABORT << 16; |
325 | goto SkipForAbort; | |
326 | } | |
327 | ||
328 | scsi_unlock(host); | |
329 | ||
a1631062 | 330 | /* reject the command if the direction indicator |
1da177e4 LT |
331 | * is UNKNOWN |
332 | */ | |
333 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { | |
334 | US_DEBUGP("UNKNOWN data direction\n"); | |
335 | us->srb->result = DID_ERROR << 16; | |
336 | } | |
337 | ||
338 | /* reject if target != 0 or if LUN is higher than | |
339 | * the maximum known LUN | |
340 | */ | |
a1631062 | 341 | else if (us->srb->device->id && |
7e4d6c38 | 342 | !(us->fflags & US_FL_SCM_MULT_TARG)) { |
1da177e4 LT |
343 | US_DEBUGP("Bad target number (%d:%d)\n", |
344 | us->srb->device->id, us->srb->device->lun); | |
345 | us->srb->result = DID_BAD_TARGET << 16; | |
346 | } | |
347 | ||
348 | else if (us->srb->device->lun > us->max_lun) { | |
349 | US_DEBUGP("Bad LUN (%d:%d)\n", | |
350 | us->srb->device->id, us->srb->device->lun); | |
351 | us->srb->result = DID_BAD_TARGET << 16; | |
352 | } | |
353 | ||
a1631062 | 354 | /* Handle those devices which need us to fake |
1da177e4 LT |
355 | * their inquiry data */ |
356 | else if ((us->srb->cmnd[0] == INQUIRY) && | |
7e4d6c38 | 357 | (us->fflags & US_FL_FIX_INQUIRY)) { |
1da177e4 LT |
358 | unsigned char data_ptr[36] = { |
359 | 0x00, 0x80, 0x02, 0x02, | |
360 | 0x1F, 0x00, 0x00, 0x00}; | |
361 | ||
362 | US_DEBUGP("Faking INQUIRY command\n"); | |
363 | fill_inquiry_response(us, data_ptr, 36); | |
364 | us->srb->result = SAM_STAT_GOOD; | |
365 | } | |
366 | ||
367 | /* we've got a command, let's do it! */ | |
368 | else { | |
369 | US_DEBUG(usb_stor_show_command(us->srb)); | |
370 | us->proto_handler(us->srb, us); | |
f283925f | 371 | usb_mark_last_busy(us->pusb_dev); |
1da177e4 LT |
372 | } |
373 | ||
374 | /* lock access to the state */ | |
375 | scsi_lock(host); | |
376 | ||
377 | /* indicate that the command is done */ | |
543f7810 | 378 | if (us->srb->result != DID_ABORT << 16) { |
a1631062 | 379 | US_DEBUGP("scsi cmd done, result=0x%x\n", |
1da177e4 LT |
380 | us->srb->result); |
381 | us->srb->scsi_done(us->srb); | |
382 | } else { | |
383 | SkipForAbort: | |
384 | US_DEBUGP("scsi command aborted\n"); | |
385 | } | |
386 | ||
387 | /* If an abort request was received we need to signal that | |
388 | * the abort has finished. The proper test for this is | |
389 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because | |
226173ed MD |
390 | * the timeout might have occurred after the command had |
391 | * already completed with a different result code. */ | |
7e4d6c38 | 392 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
393 | complete(&(us->notify)); |
394 | ||
226173ed | 395 | /* Allow USB transfers to resume */ |
7e4d6c38 AS |
396 | clear_bit(US_FLIDX_ABORTING, &us->dflags); |
397 | clear_bit(US_FLIDX_TIMED_OUT, &us->dflags); | |
226173ed MD |
398 | } |
399 | ||
1da177e4 LT |
400 | /* finished working on this command */ |
401 | us->srb = NULL; | |
402 | scsi_unlock(host); | |
403 | ||
404 | /* unlock the device pointers */ | |
4186ecf8 | 405 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
406 | } /* for (;;) */ |
407 | ||
ed76cacb AS |
408 | /* Wait until we are told to stop */ |
409 | for (;;) { | |
410 | set_current_state(TASK_INTERRUPTIBLE); | |
411 | if (kthread_should_stop()) | |
412 | break; | |
413 | schedule(); | |
414 | } | |
415 | __set_current_state(TASK_RUNNING); | |
416 | return 0; | |
a1631062 | 417 | } |
1da177e4 LT |
418 | |
419 | /*********************************************************************** | |
420 | * Device probing and disconnecting | |
421 | ***********************************************************************/ | |
422 | ||
423 | /* Associate our private data with the USB device */ | |
424 | static int associate_dev(struct us_data *us, struct usb_interface *intf) | |
425 | { | |
441b62c1 | 426 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
427 | |
428 | /* Fill in the device-related fields */ | |
429 | us->pusb_dev = interface_to_usbdev(intf); | |
430 | us->pusb_intf = intf; | |
431 | us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
432 | US_DEBUGP("Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", | |
433 | le16_to_cpu(us->pusb_dev->descriptor.idVendor), | |
434 | le16_to_cpu(us->pusb_dev->descriptor.idProduct), | |
435 | le16_to_cpu(us->pusb_dev->descriptor.bcdDevice)); | |
436 | US_DEBUGP("Interface Subclass: 0x%02x, Protocol: 0x%02x\n", | |
437 | intf->cur_altsetting->desc.bInterfaceSubClass, | |
438 | intf->cur_altsetting->desc.bInterfaceProtocol); | |
439 | ||
440 | /* Store our private data in the interface */ | |
441 | usb_set_intfdata(intf, us); | |
442 | ||
0ede76fc AS |
443 | /* Allocate the control/setup and DMA-mapped buffers */ |
444 | us->cr = kmalloc(sizeof(*us->cr), GFP_KERNEL); | |
1da177e4 LT |
445 | if (!us->cr) { |
446 | US_DEBUGP("usb_ctrlrequest allocation failed\n"); | |
447 | return -ENOMEM; | |
448 | } | |
449 | ||
997ea58e | 450 | us->iobuf = usb_alloc_coherent(us->pusb_dev, US_IOBUF_SIZE, |
1da177e4 LT |
451 | GFP_KERNEL, &us->iobuf_dma); |
452 | if (!us->iobuf) { | |
453 | US_DEBUGP("I/O buffer allocation failed\n"); | |
454 | return -ENOMEM; | |
455 | } | |
456 | return 0; | |
457 | } | |
458 | ||
c838ea46 AS |
459 | /* Works only for digits and letters, but small and fast */ |
460 | #define TOLOWER(x) ((x) | 0x20) | |
461 | ||
d4f373e5 AS |
462 | /* Adjust device flags based on the "quirks=" module parameter */ |
463 | static void adjust_quirks(struct us_data *us) | |
464 | { | |
c838ea46 AS |
465 | char *p; |
466 | u16 vid = le16_to_cpu(us->pusb_dev->descriptor.idVendor); | |
467 | u16 pid = le16_to_cpu(us->pusb_dev->descriptor.idProduct); | |
468 | unsigned f = 0; | |
a91b593e AS |
469 | unsigned int mask = (US_FL_SANE_SENSE | US_FL_BAD_SENSE | |
470 | US_FL_FIX_CAPACITY | | |
c838ea46 | 471 | US_FL_CAPACITY_HEURISTICS | US_FL_IGNORE_DEVICE | |
d4f373e5 | 472 | US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 | |
c838ea46 | 473 | US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE | |
5116901d | 474 | US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT | |
21c13a4f | 475 | US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 | |
eaa05dfc | 476 | US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE); |
c838ea46 AS |
477 | |
478 | p = quirks; | |
479 | while (*p) { | |
480 | /* Each entry consists of VID:PID:flags */ | |
481 | if (vid == simple_strtoul(p, &p, 16) && | |
482 | *p == ':' && | |
483 | pid == simple_strtoul(p+1, &p, 16) && | |
484 | *p == ':') | |
d4f373e5 | 485 | break; |
c838ea46 AS |
486 | |
487 | /* Move forward to the next entry */ | |
488 | while (*p) { | |
489 | if (*p++ == ',') | |
490 | break; | |
d4f373e5 AS |
491 | } |
492 | } | |
c838ea46 AS |
493 | if (!*p) /* No match */ |
494 | return; | |
495 | ||
496 | /* Collect the flags */ | |
497 | while (*++p && *p != ',') { | |
498 | switch (TOLOWER(*p)) { | |
499 | case 'a': | |
500 | f |= US_FL_SANE_SENSE; | |
501 | break; | |
a0bb1081 AS |
502 | case 'b': |
503 | f |= US_FL_BAD_SENSE; | |
504 | break; | |
c838ea46 AS |
505 | case 'c': |
506 | f |= US_FL_FIX_CAPACITY; | |
507 | break; | |
5116901d KR |
508 | case 'd': |
509 | f |= US_FL_NO_READ_DISC_INFO; | |
510 | break; | |
511 | case 'e': | |
512 | f |= US_FL_NO_READ_CAPACITY_16; | |
513 | break; | |
c838ea46 AS |
514 | case 'h': |
515 | f |= US_FL_CAPACITY_HEURISTICS; | |
516 | break; | |
517 | case 'i': | |
518 | f |= US_FL_IGNORE_DEVICE; | |
519 | break; | |
520 | case 'l': | |
521 | f |= US_FL_NOT_LOCKABLE; | |
522 | break; | |
523 | case 'm': | |
524 | f |= US_FL_MAX_SECTORS_64; | |
525 | break; | |
21c13a4f AS |
526 | case 'n': |
527 | f |= US_FL_INITIAL_READ10; | |
528 | break; | |
c838ea46 AS |
529 | case 'o': |
530 | f |= US_FL_CAPACITY_OK; | |
531 | break; | |
eaa05dfc NJ |
532 | case 'p': |
533 | f |= US_FL_WRITE_CACHE; | |
534 | break; | |
c838ea46 AS |
535 | case 'r': |
536 | f |= US_FL_IGNORE_RESIDUE; | |
537 | break; | |
538 | case 's': | |
539 | f |= US_FL_SINGLE_LUN; | |
540 | break; | |
541 | case 'w': | |
542 | f |= US_FL_NO_WP_DETECT; | |
543 | break; | |
544 | /* Ignore unrecognized flag characters */ | |
545 | } | |
546 | } | |
547 | us->fflags = (us->fflags & ~mask) | f; | |
d4f373e5 AS |
548 | } |
549 | ||
1da177e4 | 550 | /* Get the unusual_devs entries and the string descriptors */ |
e6e244b6 AS |
551 | static int get_device_info(struct us_data *us, const struct usb_device_id *id, |
552 | struct us_unusual_dev *unusual_dev) | |
1da177e4 LT |
553 | { |
554 | struct usb_device *dev = us->pusb_dev; | |
555 | struct usb_interface_descriptor *idesc = | |
556 | &us->pusb_intf->cur_altsetting->desc; | |
cbd3af54 | 557 | struct device *pdev = &us->pusb_intf->dev; |
1da177e4 LT |
558 | |
559 | /* Store the entries */ | |
560 | us->unusual_dev = unusual_dev; | |
8fa7fd74 | 561 | us->subclass = (unusual_dev->useProtocol == USB_SC_DEVICE) ? |
1da177e4 LT |
562 | idesc->bInterfaceSubClass : |
563 | unusual_dev->useProtocol; | |
8fa7fd74 | 564 | us->protocol = (unusual_dev->useTransport == USB_PR_DEVICE) ? |
1da177e4 LT |
565 | idesc->bInterfaceProtocol : |
566 | unusual_dev->useTransport; | |
7e4d6c38 | 567 | us->fflags = USB_US_ORIG_FLAGS(id->driver_info); |
d4f373e5 | 568 | adjust_quirks(us); |
1da177e4 | 569 | |
7e4d6c38 | 570 | if (us->fflags & US_FL_IGNORE_DEVICE) { |
cbd3af54 | 571 | dev_info(pdev, "device ignored\n"); |
3c332422 DD |
572 | return -ENODEV; |
573 | } | |
574 | ||
1da177e4 LT |
575 | /* |
576 | * This flag is only needed when we're in high-speed, so let's | |
577 | * disable it if we're in full-speed | |
578 | */ | |
579 | if (dev->speed != USB_SPEED_HIGH) | |
7e4d6c38 | 580 | us->fflags &= ~US_FL_GO_SLOW; |
1da177e4 | 581 | |
39f2f080 FC |
582 | if (us->fflags) |
583 | dev_info(pdev, "Quirks match for vid %04x pid %04x: %lx\n", | |
584 | le16_to_cpu(dev->descriptor.idVendor), | |
585 | le16_to_cpu(dev->descriptor.idProduct), | |
586 | us->fflags); | |
587 | ||
1da177e4 LT |
588 | /* Log a message if a non-generic unusual_dev entry contains an |
589 | * unnecessary subclass or protocol override. This may stimulate | |
590 | * reports from users that will help us remove unneeded entries | |
591 | * from the unusual_devs.h table. | |
592 | */ | |
593 | if (id->idVendor || id->idProduct) { | |
4c4c9432 | 594 | static const char *msgs[3] = { |
1da177e4 LT |
595 | "an unneeded SubClass entry", |
596 | "an unneeded Protocol entry", | |
597 | "unneeded SubClass and Protocol entries"}; | |
598 | struct usb_device_descriptor *ddesc = &dev->descriptor; | |
599 | int msg = -1; | |
600 | ||
8fa7fd74 | 601 | if (unusual_dev->useProtocol != USB_SC_DEVICE && |
1da177e4 LT |
602 | us->subclass == idesc->bInterfaceSubClass) |
603 | msg += 1; | |
8fa7fd74 | 604 | if (unusual_dev->useTransport != USB_PR_DEVICE && |
1da177e4 LT |
605 | us->protocol == idesc->bInterfaceProtocol) |
606 | msg += 2; | |
7e4d6c38 | 607 | if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE)) |
cbd3af54 FC |
608 | dev_notice(pdev, "This device " |
609 | "(%04x,%04x,%04x S %02x P %02x)" | |
610 | " has %s in unusual_devs.h (kernel" | |
611 | " %s)\n" | |
612 | " Please send a copy of this message to " | |
613 | "<linux-usb@vger.kernel.org> and " | |
614 | "<usb-storage@lists.one-eyed-alien.net>\n", | |
615 | le16_to_cpu(ddesc->idVendor), | |
616 | le16_to_cpu(ddesc->idProduct), | |
617 | le16_to_cpu(ddesc->bcdDevice), | |
618 | idesc->bInterfaceSubClass, | |
619 | idesc->bInterfaceProtocol, | |
620 | msgs[msg], | |
621 | utsname()->release); | |
1da177e4 | 622 | } |
3c332422 DD |
623 | |
624 | return 0; | |
1da177e4 LT |
625 | } |
626 | ||
627 | /* Get the transport settings */ | |
e6e244b6 | 628 | static void get_transport(struct us_data *us) |
1da177e4 LT |
629 | { |
630 | switch (us->protocol) { | |
8fa7fd74 | 631 | case USB_PR_CB: |
1da177e4 LT |
632 | us->transport_name = "Control/Bulk"; |
633 | us->transport = usb_stor_CB_transport; | |
634 | us->transport_reset = usb_stor_CB_reset; | |
635 | us->max_lun = 7; | |
636 | break; | |
637 | ||
8fa7fd74 | 638 | case USB_PR_CBI: |
1da177e4 | 639 | us->transport_name = "Control/Bulk/Interrupt"; |
64648a9d | 640 | us->transport = usb_stor_CB_transport; |
1da177e4 LT |
641 | us->transport_reset = usb_stor_CB_reset; |
642 | us->max_lun = 7; | |
643 | break; | |
644 | ||
8fa7fd74 | 645 | case USB_PR_BULK: |
1da177e4 LT |
646 | us->transport_name = "Bulk"; |
647 | us->transport = usb_stor_Bulk_transport; | |
648 | us->transport_reset = usb_stor_Bulk_reset; | |
649 | break; | |
1da177e4 | 650 | } |
1da177e4 LT |
651 | } |
652 | ||
653 | /* Get the protocol settings */ | |
e6e244b6 | 654 | static void get_protocol(struct us_data *us) |
1da177e4 LT |
655 | { |
656 | switch (us->subclass) { | |
8fa7fd74 | 657 | case USB_SC_RBC: |
1da177e4 LT |
658 | us->protocol_name = "Reduced Block Commands (RBC)"; |
659 | us->proto_handler = usb_stor_transparent_scsi_command; | |
660 | break; | |
661 | ||
8fa7fd74 | 662 | case USB_SC_8020: |
1da177e4 | 663 | us->protocol_name = "8020i"; |
3dae5345 | 664 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
665 | us->max_lun = 0; |
666 | break; | |
667 | ||
8fa7fd74 | 668 | case USB_SC_QIC: |
1da177e4 | 669 | us->protocol_name = "QIC-157"; |
3dae5345 | 670 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
671 | us->max_lun = 0; |
672 | break; | |
673 | ||
8fa7fd74 | 674 | case USB_SC_8070: |
1da177e4 | 675 | us->protocol_name = "8070i"; |
3dae5345 | 676 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
677 | us->max_lun = 0; |
678 | break; | |
679 | ||
8fa7fd74 | 680 | case USB_SC_SCSI: |
1da177e4 LT |
681 | us->protocol_name = "Transparent SCSI"; |
682 | us->proto_handler = usb_stor_transparent_scsi_command; | |
683 | break; | |
684 | ||
8fa7fd74 | 685 | case USB_SC_UFI: |
1da177e4 LT |
686 | us->protocol_name = "Uniform Floppy Interface (UFI)"; |
687 | us->proto_handler = usb_stor_ufi_command; | |
688 | break; | |
1da177e4 | 689 | } |
1da177e4 LT |
690 | } |
691 | ||
692 | /* Get the pipe settings */ | |
693 | static int get_pipes(struct us_data *us) | |
694 | { | |
695 | struct usb_host_interface *altsetting = | |
696 | us->pusb_intf->cur_altsetting; | |
697 | int i; | |
698 | struct usb_endpoint_descriptor *ep; | |
699 | struct usb_endpoint_descriptor *ep_in = NULL; | |
700 | struct usb_endpoint_descriptor *ep_out = NULL; | |
701 | struct usb_endpoint_descriptor *ep_int = NULL; | |
702 | ||
703 | /* | |
1096f780 | 704 | * Find the first endpoint of each type we need. |
1da177e4 | 705 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
1096f780 | 706 | * An optional interrupt-in is OK (necessary for CBI protocol). |
1da177e4 LT |
707 | * We will ignore any others. |
708 | */ | |
709 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { | |
710 | ep = &altsetting->endpoint[i].desc; | |
711 | ||
04720747 | 712 | if (usb_endpoint_xfer_bulk(ep)) { |
1096f780 AS |
713 | if (usb_endpoint_dir_in(ep)) { |
714 | if (!ep_in) | |
715 | ep_in = ep; | |
716 | } else { | |
717 | if (!ep_out) | |
718 | ep_out = ep; | |
719 | } | |
1da177e4 LT |
720 | } |
721 | ||
1096f780 AS |
722 | else if (usb_endpoint_is_int_in(ep)) { |
723 | if (!ep_int) | |
724 | ep_int = ep; | |
1da177e4 LT |
725 | } |
726 | } | |
727 | ||
8fa7fd74 | 728 | if (!ep_in || !ep_out || (us->protocol == USB_PR_CBI && !ep_int)) { |
1da177e4 LT |
729 | US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n"); |
730 | return -EIO; | |
731 | } | |
732 | ||
733 | /* Calculate and store the pipe values */ | |
734 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); | |
735 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); | |
736 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, | |
2e0fe709 | 737 | usb_endpoint_num(ep_out)); |
a1631062 | 738 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, |
2e0fe709 | 739 | usb_endpoint_num(ep_in)); |
1da177e4 LT |
740 | if (ep_int) { |
741 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, | |
2e0fe709 | 742 | usb_endpoint_num(ep_int)); |
1da177e4 LT |
743 | us->ep_bInterval = ep_int->bInterval; |
744 | } | |
745 | return 0; | |
746 | } | |
747 | ||
748 | /* Initialize all the dynamic resources we need */ | |
749 | static int usb_stor_acquire_resources(struct us_data *us) | |
750 | { | |
751 | int p; | |
3f13e66e | 752 | struct task_struct *th; |
1da177e4 LT |
753 | |
754 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); | |
755 | if (!us->current_urb) { | |
756 | US_DEBUGP("URB allocation failed\n"); | |
757 | return -ENOMEM; | |
758 | } | |
759 | ||
1da177e4 LT |
760 | /* Just before we start our control thread, initialize |
761 | * the device if it needs initialization */ | |
b876aef7 AS |
762 | if (us->unusual_dev->initFunction) { |
763 | p = us->unusual_dev->initFunction(us); | |
764 | if (p) | |
765 | return p; | |
766 | } | |
1da177e4 LT |
767 | |
768 | /* Start up our control thread */ | |
ed76cacb | 769 | th = kthread_run(usb_stor_control_thread, us, "usb-storage"); |
3f13e66e | 770 | if (IS_ERR(th)) { |
cbd3af54 FC |
771 | dev_warn(&us->pusb_intf->dev, |
772 | "Unable to start control thread\n"); | |
3f13e66e | 773 | return PTR_ERR(th); |
1da177e4 | 774 | } |
ed76cacb | 775 | us->ctl_thread = th; |
1da177e4 LT |
776 | |
777 | return 0; | |
778 | } | |
779 | ||
780 | /* Release all our dynamic resources */ | |
781 | static void usb_stor_release_resources(struct us_data *us) | |
782 | { | |
441b62c1 | 783 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
784 | |
785 | /* Tell the control thread to exit. The SCSI host must | |
543f7810 AS |
786 | * already have been removed and the DISCONNECTING flag set |
787 | * so that we won't accept any more commands. | |
1da177e4 LT |
788 | */ |
789 | US_DEBUGP("-- sending exit command to thread\n"); | |
7119e3c3 | 790 | complete(&us->cmnd_ready); |
ed76cacb AS |
791 | if (us->ctl_thread) |
792 | kthread_stop(us->ctl_thread); | |
1da177e4 LT |
793 | |
794 | /* Call the destructor routine, if it exists */ | |
795 | if (us->extra_destructor) { | |
796 | US_DEBUGP("-- calling extra_destructor()\n"); | |
797 | us->extra_destructor(us->extra); | |
798 | } | |
799 | ||
800 | /* Free the extra data and the URB */ | |
801 | kfree(us->extra); | |
802 | usb_free_urb(us->current_urb); | |
803 | } | |
804 | ||
805 | /* Dissociate from the USB device */ | |
806 | static void dissociate_dev(struct us_data *us) | |
807 | { | |
441b62c1 | 808 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 | 809 | |
0ede76fc AS |
810 | /* Free the buffers */ |
811 | kfree(us->cr); | |
997ea58e | 812 | usb_free_coherent(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, us->iobuf_dma); |
1da177e4 LT |
813 | |
814 | /* Remove our private data from the interface */ | |
815 | usb_set_intfdata(us->pusb_intf, NULL); | |
816 | } | |
817 | ||
543f7810 AS |
818 | /* First stage of disconnect processing: stop SCSI scanning, |
819 | * remove the host, and stop accepting new commands | |
820 | */ | |
77f46328 MD |
821 | static void quiesce_and_remove_host(struct us_data *us) |
822 | { | |
eecd11ed AS |
823 | struct Scsi_Host *host = us_to_host(us); |
824 | ||
543f7810 | 825 | /* If the device is really gone, cut short reset delays */ |
bb94a406 | 826 | if (us->pusb_dev->state == USB_STATE_NOTATTACHED) { |
543f7810 | 827 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); |
bb94a406 AS |
828 | wake_up(&us->delay_wait); |
829 | } | |
77f46328 | 830 | |
bb94a406 AS |
831 | /* Prevent SCSI scanning (if it hasn't started yet) |
832 | * or wait for the SCSI-scanning routine to stop. | |
543f7810 | 833 | */ |
bb94a406 AS |
834 | cancel_delayed_work_sync(&us->scan_dwork); |
835 | ||
836 | /* Balance autopm calls if scanning was cancelled */ | |
837 | if (test_bit(US_FLIDX_SCAN_PENDING, &us->dflags)) | |
838 | usb_autopm_put_interface_no_suspend(us->pusb_intf); | |
26186ba7 | 839 | |
543f7810 AS |
840 | /* Removing the host will perform an orderly shutdown: caches |
841 | * synchronized, disks spun down, etc. | |
842 | */ | |
eecd11ed | 843 | scsi_remove_host(host); |
2f67cd5b | 844 | |
543f7810 AS |
845 | /* Prevent any new commands from being accepted and cut short |
846 | * reset delays. | |
847 | */ | |
848 | scsi_lock(host); | |
849 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); | |
850 | scsi_unlock(host); | |
851 | wake_up(&us->delay_wait); | |
77f46328 MD |
852 | } |
853 | ||
854 | /* Second stage of disconnect processing: deallocate all resources */ | |
855 | static void release_everything(struct us_data *us) | |
856 | { | |
857 | usb_stor_release_resources(us); | |
858 | dissociate_dev(us); | |
859 | ||
860 | /* Drop our reference to the host; the SCSI core will free it | |
861 | * (and "us" along with it) when the refcount becomes 0. */ | |
862 | scsi_host_put(us_to_host(us)); | |
863 | } | |
864 | ||
bb94a406 AS |
865 | /* Delayed-work routine to carry out SCSI-device scanning */ |
866 | static void usb_stor_scan_dwork(struct work_struct *work) | |
1da177e4 | 867 | { |
bb94a406 AS |
868 | struct us_data *us = container_of(work, struct us_data, |
869 | scan_dwork.work); | |
cbd3af54 | 870 | struct device *dev = &us->pusb_intf->dev; |
1da177e4 | 871 | |
bb94a406 | 872 | dev_dbg(dev, "starting scan\n"); |
ec012476 | 873 | |
bb94a406 AS |
874 | /* For bulk-only devices, determine the max LUN value */ |
875 | if (us->protocol == USB_PR_BULK && !(us->fflags & US_FL_SINGLE_LUN)) { | |
876 | mutex_lock(&us->dev_mutex); | |
877 | us->max_lun = usb_stor_Bulk_max_lun(us); | |
878 | mutex_unlock(&us->dev_mutex); | |
1da177e4 | 879 | } |
bb94a406 AS |
880 | scsi_scan_host(us_to_host(us)); |
881 | dev_dbg(dev, "scan complete\n"); | |
1da177e4 | 882 | |
bb94a406 | 883 | /* Should we unbind if no devices were detected? */ |
1da177e4 | 884 | |
f283925f | 885 | usb_autopm_put_interface(us->pusb_intf); |
bb94a406 | 886 | clear_bit(US_FLIDX_SCAN_PENDING, &us->dflags); |
1da177e4 LT |
887 | } |
888 | ||
4c1bd3d7 DV |
889 | static unsigned int usb_stor_sg_tablesize(struct usb_interface *intf) |
890 | { | |
891 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
892 | ||
893 | if (usb_dev->bus->sg_tablesize) { | |
894 | return usb_dev->bus->sg_tablesize; | |
895 | } | |
896 | return SG_ALL; | |
897 | } | |
1da177e4 | 898 | |
e6e244b6 AS |
899 | /* First part of general USB mass-storage probing */ |
900 | int usb_stor_probe1(struct us_data **pus, | |
901 | struct usb_interface *intf, | |
902 | const struct usb_device_id *id, | |
903 | struct us_unusual_dev *unusual_dev) | |
1da177e4 LT |
904 | { |
905 | struct Scsi_Host *host; | |
906 | struct us_data *us; | |
1da177e4 | 907 | int result; |
a00828e9 | 908 | |
1da177e4 LT |
909 | US_DEBUGP("USB Mass Storage device detected\n"); |
910 | ||
911 | /* | |
912 | * Ask the SCSI layer to allocate a host structure, with extra | |
913 | * space at the end for our private us_data structure. | |
914 | */ | |
915 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); | |
916 | if (!host) { | |
cbd3af54 FC |
917 | dev_warn(&intf->dev, |
918 | "Unable to allocate the scsi host\n"); | |
1da177e4 LT |
919 | return -ENOMEM; |
920 | } | |
921 | ||
17f06022 RS |
922 | /* |
923 | * Allow 16-byte CDBs and thus > 2TB | |
924 | */ | |
925 | host->max_cmd_len = 16; | |
4c1bd3d7 | 926 | host->sg_tablesize = usb_stor_sg_tablesize(intf); |
e6e244b6 | 927 | *pus = us = host_to_us(host); |
1da177e4 | 928 | memset(us, 0, sizeof(struct us_data)); |
4186ecf8 | 929 | mutex_init(&(us->dev_mutex)); |
c825bab0 | 930 | us_set_lock_class(&us->dev_mutex, intf); |
7119e3c3 | 931 | init_completion(&us->cmnd_ready); |
1da177e4 LT |
932 | init_completion(&(us->notify)); |
933 | init_waitqueue_head(&us->delay_wait); | |
bb94a406 | 934 | INIT_DELAYED_WORK(&us->scan_dwork, usb_stor_scan_dwork); |
1da177e4 LT |
935 | |
936 | /* Associate the us_data structure with the USB device */ | |
937 | result = associate_dev(us, intf); | |
938 | if (result) | |
939 | goto BadDevice; | |
940 | ||
e6e244b6 AS |
941 | /* Get the unusual_devs entries and the descriptors */ |
942 | result = get_device_info(us, id, unusual_dev); | |
3c332422 DD |
943 | if (result) |
944 | goto BadDevice; | |
1da177e4 | 945 | |
e6e244b6 AS |
946 | /* Get standard transport and protocol settings */ |
947 | get_transport(us); | |
948 | get_protocol(us); | |
949 | ||
950 | /* Give the caller a chance to fill in specialized transport | |
951 | * or protocol settings. | |
952 | */ | |
953 | return 0; | |
954 | ||
955 | BadDevice: | |
956 | US_DEBUGP("storage_probe() failed\n"); | |
957 | release_everything(us); | |
958 | return result; | |
959 | } | |
960 | EXPORT_SYMBOL_GPL(usb_stor_probe1); | |
961 | ||
962 | /* Second part of general USB mass-storage probing */ | |
963 | int usb_stor_probe2(struct us_data *us) | |
964 | { | |
e6e244b6 | 965 | int result; |
cbd3af54 | 966 | struct device *dev = &us->pusb_intf->dev; |
e6e244b6 AS |
967 | |
968 | /* Make sure the transport and protocol have both been set */ | |
969 | if (!us->transport || !us->proto_handler) { | |
970 | result = -ENXIO; | |
1da177e4 | 971 | goto BadDevice; |
e6e244b6 AS |
972 | } |
973 | US_DEBUGP("Transport: %s\n", us->transport_name); | |
974 | US_DEBUGP("Protocol: %s\n", us->protocol_name); | |
975 | ||
976 | /* fix for single-lun devices */ | |
977 | if (us->fflags & US_FL_SINGLE_LUN) | |
978 | us->max_lun = 0; | |
979 | ||
980 | /* Find the endpoints and calculate pipe values */ | |
1da177e4 LT |
981 | result = get_pipes(us); |
982 | if (result) | |
983 | goto BadDevice; | |
984 | ||
21c13a4f AS |
985 | /* |
986 | * If the device returns invalid data for the first READ(10) | |
987 | * command, indicate the command should be retried. | |
988 | */ | |
989 | if (us->fflags & US_FL_INITIAL_READ10) | |
990 | set_bit(US_FLIDX_REDO_READ10, &us->dflags); | |
991 | ||
1da177e4 LT |
992 | /* Acquire all the other resources and add the host */ |
993 | result = usb_stor_acquire_resources(us); | |
994 | if (result) | |
995 | goto BadDevice; | |
00fa43ef MW |
996 | snprintf(us->scsi_name, sizeof(us->scsi_name), "usb-storage %s", |
997 | dev_name(&us->pusb_intf->dev)); | |
cbd3af54 | 998 | result = scsi_add_host(us_to_host(us), dev); |
1da177e4 | 999 | if (result) { |
cbd3af54 FC |
1000 | dev_warn(dev, |
1001 | "Unable to add the scsi host\n"); | |
1da177e4 LT |
1002 | goto BadDevice; |
1003 | } | |
1004 | ||
bb94a406 | 1005 | /* Submit the delayed_work for SCSI-device scanning */ |
f283925f | 1006 | usb_autopm_get_interface_no_resume(us->pusb_intf); |
bb94a406 | 1007 | set_bit(US_FLIDX_SCAN_PENDING, &us->dflags); |
1da177e4 | 1008 | |
bb94a406 AS |
1009 | if (delay_use > 0) |
1010 | dev_dbg(dev, "waiting for device to settle before scanning\n"); | |
1011 | queue_delayed_work(system_freezable_wq, &us->scan_dwork, | |
1012 | delay_use * HZ); | |
1da177e4 LT |
1013 | return 0; |
1014 | ||
1015 | /* We come here if there are any problems */ | |
1016 | BadDevice: | |
1017 | US_DEBUGP("storage_probe() failed\n"); | |
77f46328 | 1018 | release_everything(us); |
1da177e4 LT |
1019 | return result; |
1020 | } | |
e6e244b6 | 1021 | EXPORT_SYMBOL_GPL(usb_stor_probe2); |
1da177e4 | 1022 | |
e6e244b6 AS |
1023 | /* Handle a USB mass-storage disconnect */ |
1024 | void usb_stor_disconnect(struct usb_interface *intf) | |
1da177e4 LT |
1025 | { |
1026 | struct us_data *us = usb_get_intfdata(intf); | |
1027 | ||
1028 | US_DEBUGP("storage_disconnect() called\n"); | |
77f46328 MD |
1029 | quiesce_and_remove_host(us); |
1030 | release_everything(us); | |
1da177e4 | 1031 | } |
e6e244b6 AS |
1032 | EXPORT_SYMBOL_GPL(usb_stor_disconnect); |
1033 | ||
1034 | /* The main probe routine for standard devices */ | |
1035 | static int storage_probe(struct usb_interface *intf, | |
1036 | const struct usb_device_id *id) | |
1037 | { | |
fd7ff36d | 1038 | struct us_unusual_dev *unusual_dev; |
e6e244b6 AS |
1039 | struct us_data *us; |
1040 | int result; | |
fd7ff36d | 1041 | int size; |
e6e244b6 AS |
1042 | |
1043 | /* | |
1044 | * If libusual is configured, let it decide whether a standard | |
1045 | * device should be handled by usb-storage or by ub. | |
1046 | * If the device isn't standard (is handled by a subdriver | |
1047 | * module) then don't accept it. | |
1048 | */ | |
1049 | if (usb_usual_check_type(id, USB_US_TYPE_STOR) || | |
1050 | usb_usual_ignore_device(intf)) | |
1051 | return -ENXIO; | |
1052 | ||
1053 | /* | |
1054 | * Call the general probe procedures. | |
1055 | * | |
1056 | * The unusual_dev_list array is parallel to the usb_storage_usb_ids | |
1057 | * table, so we use the index of the id entry to find the | |
1058 | * corresponding unusual_devs entry. | |
1059 | */ | |
fd7ff36d HL |
1060 | |
1061 | size = ARRAY_SIZE(us_unusual_dev_list); | |
1062 | if (id >= usb_storage_usb_ids && id < usb_storage_usb_ids + size) { | |
1063 | unusual_dev = (id - usb_storage_usb_ids) + us_unusual_dev_list; | |
1064 | } else { | |
1065 | unusual_dev = &for_dynamic_ids; | |
1066 | ||
1067 | US_DEBUGP("%s %s 0x%04x 0x%04x\n", "Use Bulk-Only transport", | |
1068 | "with the Transparent SCSI protocol for dynamic id:", | |
1069 | id->idVendor, id->idProduct); | |
1070 | } | |
1071 | ||
1072 | result = usb_stor_probe1(&us, intf, id, unusual_dev); | |
e6e244b6 AS |
1073 | if (result) |
1074 | return result; | |
1075 | ||
1076 | /* No special transport or protocol settings in the main module */ | |
1077 | ||
1078 | result = usb_stor_probe2(us); | |
1079 | return result; | |
1080 | } | |
1da177e4 LT |
1081 | |
1082 | /*********************************************************************** | |
1083 | * Initialization and registration | |
1084 | ***********************************************************************/ | |
1085 | ||
ce2596df | 1086 | static struct usb_driver usb_storage_driver = { |
ce2596df AS |
1087 | .name = "usb-storage", |
1088 | .probe = storage_probe, | |
e6e244b6 AS |
1089 | .disconnect = usb_stor_disconnect, |
1090 | .suspend = usb_stor_suspend, | |
1091 | .resume = usb_stor_resume, | |
1092 | .reset_resume = usb_stor_reset_resume, | |
1093 | .pre_reset = usb_stor_pre_reset, | |
1094 | .post_reset = usb_stor_post_reset, | |
1095 | .id_table = usb_storage_usb_ids, | |
f283925f | 1096 | .supports_autosuspend = 1, |
543f7810 | 1097 | .soft_unbind = 1, |
ce2596df AS |
1098 | }; |
1099 | ||
1da177e4 LT |
1100 | static int __init usb_stor_init(void) |
1101 | { | |
1102 | int retval; | |
d4f373e5 | 1103 | |
cbd3af54 | 1104 | pr_info("Initializing USB Mass Storage driver...\n"); |
1da177e4 LT |
1105 | |
1106 | /* register the driver, return usb_register return code if error */ | |
1107 | retval = usb_register(&usb_storage_driver); | |
a00828e9 | 1108 | if (retval == 0) { |
cbd3af54 | 1109 | pr_info("USB Mass Storage support registered.\n"); |
a00828e9 PZ |
1110 | usb_usual_set_present(USB_US_TYPE_STOR); |
1111 | } | |
1da177e4 LT |
1112 | return retval; |
1113 | } | |
1114 | ||
1115 | static void __exit usb_stor_exit(void) | |
1116 | { | |
1117 | US_DEBUGP("usb_stor_exit() called\n"); | |
1118 | ||
1119 | /* Deregister the driver | |
1120 | * This will cause disconnect() to be called for each | |
1121 | * attached unit | |
1122 | */ | |
1123 | US_DEBUGP("-- calling usb_deregister()\n"); | |
1124 | usb_deregister(&usb_storage_driver) ; | |
1125 | ||
a00828e9 | 1126 | usb_usual_clear_present(USB_US_TYPE_STOR); |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | module_init(usb_stor_init); | |
1130 | module_exit(usb_stor_exit); |