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[] = { | |
124 | # include "unusual_devs.h" | |
e6e244b6 | 125 | { } /* Terminating entry */ |
1da177e4 LT |
126 | }; |
127 | ||
e6e244b6 AS |
128 | #undef UNUSUAL_DEV |
129 | #undef COMPLIANT_DEV | |
130 | #undef USUAL_DEV | |
131 | ||
ce2596df AS |
132 | |
133 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ | |
134 | ||
e6e244b6 | 135 | int usb_stor_suspend(struct usb_interface *iface, pm_message_t message) |
ce2596df AS |
136 | { |
137 | struct us_data *us = usb_get_intfdata(iface); | |
138 | ||
139 | /* Wait until no command is running */ | |
4186ecf8 | 140 | mutex_lock(&us->dev_mutex); |
ce2596df | 141 | |
441b62c1 | 142 | US_DEBUGP("%s\n", __func__); |
7931e1c6 MD |
143 | if (us->suspend_resume_hook) |
144 | (us->suspend_resume_hook)(us, US_SUSPEND); | |
ce2596df | 145 | |
d526875d GKH |
146 | /* When runtime PM is working, we'll set a flag to indicate |
147 | * whether we should autoresume when a SCSI request arrives. */ | |
148 | ||
4186ecf8 | 149 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
150 | return 0; |
151 | } | |
e6e244b6 | 152 | EXPORT_SYMBOL_GPL(usb_stor_suspend); |
ce2596df | 153 | |
e6e244b6 | 154 | int usb_stor_resume(struct usb_interface *iface) |
ce2596df AS |
155 | { |
156 | struct us_data *us = usb_get_intfdata(iface); | |
157 | ||
d526875d | 158 | mutex_lock(&us->dev_mutex); |
8dfe4b14 | 159 | |
441b62c1 | 160 | US_DEBUGP("%s\n", __func__); |
7931e1c6 MD |
161 | if (us->suspend_resume_hook) |
162 | (us->suspend_resume_hook)(us, US_RESUME); | |
ce2596df | 163 | |
d526875d | 164 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
165 | return 0; |
166 | } | |
e6e244b6 | 167 | EXPORT_SYMBOL_GPL(usb_stor_resume); |
ce2596df | 168 | |
e6e244b6 | 169 | int usb_stor_reset_resume(struct usb_interface *iface) |
f07600cf AS |
170 | { |
171 | struct us_data *us = usb_get_intfdata(iface); | |
172 | ||
441b62c1 | 173 | US_DEBUGP("%s\n", __func__); |
f07600cf AS |
174 | |
175 | /* Report the reset to the SCSI core */ | |
176 | usb_stor_report_bus_reset(us); | |
177 | ||
178 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
179 | * the device */ | |
180 | return 0; | |
181 | } | |
e6e244b6 | 182 | EXPORT_SYMBOL_GPL(usb_stor_reset_resume); |
f07600cf | 183 | |
ce2596df | 184 | #endif /* CONFIG_PM */ |
1da177e4 | 185 | |
47104b0d AS |
186 | /* |
187 | * The next two routines get called just before and just after | |
188 | * a USB port reset, whether from this driver or a different one. | |
189 | */ | |
190 | ||
e6e244b6 | 191 | int usb_stor_pre_reset(struct usb_interface *iface) |
47104b0d AS |
192 | { |
193 | struct us_data *us = usb_get_intfdata(iface); | |
194 | ||
441b62c1 | 195 | US_DEBUGP("%s\n", __func__); |
47104b0d AS |
196 | |
197 | /* Make sure no command runs during the reset */ | |
198 | mutex_lock(&us->dev_mutex); | |
f07600cf | 199 | return 0; |
47104b0d | 200 | } |
e6e244b6 | 201 | EXPORT_SYMBOL_GPL(usb_stor_pre_reset); |
47104b0d | 202 | |
e6e244b6 | 203 | int usb_stor_post_reset(struct usb_interface *iface) |
47104b0d AS |
204 | { |
205 | struct us_data *us = usb_get_intfdata(iface); | |
206 | ||
441b62c1 | 207 | US_DEBUGP("%s\n", __func__); |
47104b0d AS |
208 | |
209 | /* Report the reset to the SCSI core */ | |
47104b0d | 210 | usb_stor_report_bus_reset(us); |
47104b0d AS |
211 | |
212 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
213 | * the device */ | |
0458d5b4 | 214 | |
f07600cf AS |
215 | mutex_unlock(&us->dev_mutex); |
216 | return 0; | |
47104b0d | 217 | } |
e6e244b6 | 218 | EXPORT_SYMBOL_GPL(usb_stor_post_reset); |
47104b0d | 219 | |
1da177e4 LT |
220 | /* |
221 | * fill_inquiry_response takes an unsigned char array (which must | |
222 | * be at least 36 characters) and populates the vendor name, | |
223 | * product name, and revision fields. Then the array is copied | |
224 | * into the SCSI command's response buffer (oddly enough | |
225 | * called request_buffer). data_len contains the length of the | |
226 | * data array, which again must be at least 36. | |
227 | */ | |
228 | ||
229 | void fill_inquiry_response(struct us_data *us, unsigned char *data, | |
230 | unsigned int data_len) | |
231 | { | |
232 | if (data_len<36) // You lose. | |
233 | return; | |
234 | ||
f3f6faa9 | 235 | memset(data+8, ' ', 28); |
1da177e4 LT |
236 | if(data[0]&0x20) { /* USB device currently not connected. Return |
237 | peripheral qualifier 001b ("...however, the | |
238 | physical device is not currently connected | |
239 | to this logical unit") and leave vendor and | |
240 | product identification empty. ("If the target | |
241 | does store some of the INQUIRY data on the | |
242 | device, it may return zeros or ASCII spaces | |
243 | (20h) in those fields until the data is | |
244 | available from the device."). */ | |
1da177e4 LT |
245 | } else { |
246 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); | |
f3f6faa9 AS |
247 | int n; |
248 | ||
249 | n = strlen(us->unusual_dev->vendorName); | |
250 | memcpy(data+8, us->unusual_dev->vendorName, min(8, n)); | |
251 | n = strlen(us->unusual_dev->productName); | |
252 | memcpy(data+16, us->unusual_dev->productName, min(16, n)); | |
253 | ||
1da177e4 LT |
254 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); |
255 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); | |
256 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); | |
257 | data[35] = 0x30 + ((bcdDevice) & 0x0F); | |
258 | } | |
259 | ||
260 | usb_stor_set_xfer_buf(data, data_len, us->srb); | |
261 | } | |
e6e244b6 | 262 | EXPORT_SYMBOL_GPL(fill_inquiry_response); |
1da177e4 LT |
263 | |
264 | static int usb_stor_control_thread(void * __us) | |
265 | { | |
266 | struct us_data *us = (struct us_data *)__us; | |
267 | struct Scsi_Host *host = us_to_host(us); | |
268 | ||
1da177e4 LT |
269 | for(;;) { |
270 | US_DEBUGP("*** thread sleeping.\n"); | |
7119e3c3 | 271 | if (wait_for_completion_interruptible(&us->cmnd_ready)) |
1da177e4 | 272 | break; |
7119e3c3 | 273 | |
1da177e4 LT |
274 | US_DEBUGP("*** thread awakened.\n"); |
275 | ||
276 | /* lock the device pointers */ | |
4186ecf8 | 277 | mutex_lock(&(us->dev_mutex)); |
1da177e4 | 278 | |
543f7810 AS |
279 | /* lock access to the state */ |
280 | scsi_lock(host); | |
281 | ||
282 | /* When we are called with no command pending, we're done */ | |
283 | if (us->srb == NULL) { | |
284 | scsi_unlock(host); | |
4186ecf8 | 285 | mutex_unlock(&us->dev_mutex); |
543f7810 | 286 | US_DEBUGP("-- exiting\n"); |
1da177e4 LT |
287 | break; |
288 | } | |
289 | ||
1da177e4 | 290 | /* has the command timed out *already* ? */ |
7e4d6c38 | 291 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
292 | us->srb->result = DID_ABORT << 16; |
293 | goto SkipForAbort; | |
294 | } | |
295 | ||
296 | scsi_unlock(host); | |
297 | ||
298 | /* reject the command if the direction indicator | |
299 | * is UNKNOWN | |
300 | */ | |
301 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { | |
302 | US_DEBUGP("UNKNOWN data direction\n"); | |
303 | us->srb->result = DID_ERROR << 16; | |
304 | } | |
305 | ||
306 | /* reject if target != 0 or if LUN is higher than | |
307 | * the maximum known LUN | |
308 | */ | |
309 | else if (us->srb->device->id && | |
7e4d6c38 | 310 | !(us->fflags & US_FL_SCM_MULT_TARG)) { |
1da177e4 LT |
311 | US_DEBUGP("Bad target number (%d:%d)\n", |
312 | us->srb->device->id, us->srb->device->lun); | |
313 | us->srb->result = DID_BAD_TARGET << 16; | |
314 | } | |
315 | ||
316 | else if (us->srb->device->lun > us->max_lun) { | |
317 | US_DEBUGP("Bad LUN (%d:%d)\n", | |
318 | us->srb->device->id, us->srb->device->lun); | |
319 | us->srb->result = DID_BAD_TARGET << 16; | |
320 | } | |
321 | ||
322 | /* Handle those devices which need us to fake | |
323 | * their inquiry data */ | |
324 | else if ((us->srb->cmnd[0] == INQUIRY) && | |
7e4d6c38 | 325 | (us->fflags & US_FL_FIX_INQUIRY)) { |
1da177e4 LT |
326 | unsigned char data_ptr[36] = { |
327 | 0x00, 0x80, 0x02, 0x02, | |
328 | 0x1F, 0x00, 0x00, 0x00}; | |
329 | ||
330 | US_DEBUGP("Faking INQUIRY command\n"); | |
331 | fill_inquiry_response(us, data_ptr, 36); | |
332 | us->srb->result = SAM_STAT_GOOD; | |
333 | } | |
334 | ||
335 | /* we've got a command, let's do it! */ | |
336 | else { | |
337 | US_DEBUG(usb_stor_show_command(us->srb)); | |
338 | us->proto_handler(us->srb, us); | |
f283925f | 339 | usb_mark_last_busy(us->pusb_dev); |
1da177e4 LT |
340 | } |
341 | ||
342 | /* lock access to the state */ | |
343 | scsi_lock(host); | |
344 | ||
345 | /* indicate that the command is done */ | |
543f7810 | 346 | if (us->srb->result != DID_ABORT << 16) { |
1da177e4 LT |
347 | US_DEBUGP("scsi cmd done, result=0x%x\n", |
348 | us->srb->result); | |
349 | us->srb->scsi_done(us->srb); | |
350 | } else { | |
351 | SkipForAbort: | |
352 | US_DEBUGP("scsi command aborted\n"); | |
353 | } | |
354 | ||
355 | /* If an abort request was received we need to signal that | |
356 | * the abort has finished. The proper test for this is | |
357 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because | |
226173ed MD |
358 | * the timeout might have occurred after the command had |
359 | * already completed with a different result code. */ | |
7e4d6c38 | 360 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
361 | complete(&(us->notify)); |
362 | ||
226173ed | 363 | /* Allow USB transfers to resume */ |
7e4d6c38 AS |
364 | clear_bit(US_FLIDX_ABORTING, &us->dflags); |
365 | clear_bit(US_FLIDX_TIMED_OUT, &us->dflags); | |
226173ed MD |
366 | } |
367 | ||
1da177e4 LT |
368 | /* finished working on this command */ |
369 | us->srb = NULL; | |
370 | scsi_unlock(host); | |
371 | ||
372 | /* unlock the device pointers */ | |
4186ecf8 | 373 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
374 | } /* for (;;) */ |
375 | ||
ed76cacb AS |
376 | /* Wait until we are told to stop */ |
377 | for (;;) { | |
378 | set_current_state(TASK_INTERRUPTIBLE); | |
379 | if (kthread_should_stop()) | |
380 | break; | |
381 | schedule(); | |
382 | } | |
383 | __set_current_state(TASK_RUNNING); | |
384 | return 0; | |
1da177e4 LT |
385 | } |
386 | ||
387 | /*********************************************************************** | |
388 | * Device probing and disconnecting | |
389 | ***********************************************************************/ | |
390 | ||
391 | /* Associate our private data with the USB device */ | |
392 | static int associate_dev(struct us_data *us, struct usb_interface *intf) | |
393 | { | |
441b62c1 | 394 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
395 | |
396 | /* Fill in the device-related fields */ | |
397 | us->pusb_dev = interface_to_usbdev(intf); | |
398 | us->pusb_intf = intf; | |
399 | us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
400 | US_DEBUGP("Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", | |
401 | le16_to_cpu(us->pusb_dev->descriptor.idVendor), | |
402 | le16_to_cpu(us->pusb_dev->descriptor.idProduct), | |
403 | le16_to_cpu(us->pusb_dev->descriptor.bcdDevice)); | |
404 | US_DEBUGP("Interface Subclass: 0x%02x, Protocol: 0x%02x\n", | |
405 | intf->cur_altsetting->desc.bInterfaceSubClass, | |
406 | intf->cur_altsetting->desc.bInterfaceProtocol); | |
407 | ||
408 | /* Store our private data in the interface */ | |
409 | usb_set_intfdata(intf, us); | |
410 | ||
0ede76fc AS |
411 | /* Allocate the control/setup and DMA-mapped buffers */ |
412 | us->cr = kmalloc(sizeof(*us->cr), GFP_KERNEL); | |
1da177e4 LT |
413 | if (!us->cr) { |
414 | US_DEBUGP("usb_ctrlrequest allocation failed\n"); | |
415 | return -ENOMEM; | |
416 | } | |
417 | ||
997ea58e | 418 | us->iobuf = usb_alloc_coherent(us->pusb_dev, US_IOBUF_SIZE, |
1da177e4 LT |
419 | GFP_KERNEL, &us->iobuf_dma); |
420 | if (!us->iobuf) { | |
421 | US_DEBUGP("I/O buffer allocation failed\n"); | |
422 | return -ENOMEM; | |
423 | } | |
424 | return 0; | |
425 | } | |
426 | ||
c838ea46 AS |
427 | /* Works only for digits and letters, but small and fast */ |
428 | #define TOLOWER(x) ((x) | 0x20) | |
429 | ||
d4f373e5 AS |
430 | /* Adjust device flags based on the "quirks=" module parameter */ |
431 | static void adjust_quirks(struct us_data *us) | |
432 | { | |
c838ea46 AS |
433 | char *p; |
434 | u16 vid = le16_to_cpu(us->pusb_dev->descriptor.idVendor); | |
435 | u16 pid = le16_to_cpu(us->pusb_dev->descriptor.idProduct); | |
436 | unsigned f = 0; | |
a91b593e AS |
437 | unsigned int mask = (US_FL_SANE_SENSE | US_FL_BAD_SENSE | |
438 | US_FL_FIX_CAPACITY | | |
c838ea46 | 439 | US_FL_CAPACITY_HEURISTICS | US_FL_IGNORE_DEVICE | |
d4f373e5 | 440 | US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 | |
c838ea46 | 441 | US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE | |
5116901d | 442 | US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT | |
21c13a4f AS |
443 | US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 | |
444 | US_FL_INITIAL_READ10); | |
c838ea46 AS |
445 | |
446 | p = quirks; | |
447 | while (*p) { | |
448 | /* Each entry consists of VID:PID:flags */ | |
449 | if (vid == simple_strtoul(p, &p, 16) && | |
450 | *p == ':' && | |
451 | pid == simple_strtoul(p+1, &p, 16) && | |
452 | *p == ':') | |
d4f373e5 | 453 | break; |
c838ea46 AS |
454 | |
455 | /* Move forward to the next entry */ | |
456 | while (*p) { | |
457 | if (*p++ == ',') | |
458 | break; | |
d4f373e5 AS |
459 | } |
460 | } | |
c838ea46 AS |
461 | if (!*p) /* No match */ |
462 | return; | |
463 | ||
464 | /* Collect the flags */ | |
465 | while (*++p && *p != ',') { | |
466 | switch (TOLOWER(*p)) { | |
467 | case 'a': | |
468 | f |= US_FL_SANE_SENSE; | |
469 | break; | |
a0bb1081 AS |
470 | case 'b': |
471 | f |= US_FL_BAD_SENSE; | |
472 | break; | |
c838ea46 AS |
473 | case 'c': |
474 | f |= US_FL_FIX_CAPACITY; | |
475 | break; | |
5116901d KR |
476 | case 'd': |
477 | f |= US_FL_NO_READ_DISC_INFO; | |
478 | break; | |
479 | case 'e': | |
480 | f |= US_FL_NO_READ_CAPACITY_16; | |
481 | break; | |
c838ea46 AS |
482 | case 'h': |
483 | f |= US_FL_CAPACITY_HEURISTICS; | |
484 | break; | |
485 | case 'i': | |
486 | f |= US_FL_IGNORE_DEVICE; | |
487 | break; | |
488 | case 'l': | |
489 | f |= US_FL_NOT_LOCKABLE; | |
490 | break; | |
491 | case 'm': | |
492 | f |= US_FL_MAX_SECTORS_64; | |
493 | break; | |
21c13a4f AS |
494 | case 'n': |
495 | f |= US_FL_INITIAL_READ10; | |
496 | break; | |
c838ea46 AS |
497 | case 'o': |
498 | f |= US_FL_CAPACITY_OK; | |
499 | break; | |
500 | case 'r': | |
501 | f |= US_FL_IGNORE_RESIDUE; | |
502 | break; | |
503 | case 's': | |
504 | f |= US_FL_SINGLE_LUN; | |
505 | break; | |
506 | case 'w': | |
507 | f |= US_FL_NO_WP_DETECT; | |
508 | break; | |
509 | /* Ignore unrecognized flag characters */ | |
510 | } | |
511 | } | |
512 | us->fflags = (us->fflags & ~mask) | f; | |
d4f373e5 AS |
513 | } |
514 | ||
1da177e4 | 515 | /* Get the unusual_devs entries and the string descriptors */ |
e6e244b6 AS |
516 | static int get_device_info(struct us_data *us, const struct usb_device_id *id, |
517 | struct us_unusual_dev *unusual_dev) | |
1da177e4 LT |
518 | { |
519 | struct usb_device *dev = us->pusb_dev; | |
520 | struct usb_interface_descriptor *idesc = | |
521 | &us->pusb_intf->cur_altsetting->desc; | |
cbd3af54 | 522 | struct device *pdev = &us->pusb_intf->dev; |
1da177e4 LT |
523 | |
524 | /* Store the entries */ | |
525 | us->unusual_dev = unusual_dev; | |
8fa7fd74 | 526 | us->subclass = (unusual_dev->useProtocol == USB_SC_DEVICE) ? |
1da177e4 LT |
527 | idesc->bInterfaceSubClass : |
528 | unusual_dev->useProtocol; | |
8fa7fd74 | 529 | us->protocol = (unusual_dev->useTransport == USB_PR_DEVICE) ? |
1da177e4 LT |
530 | idesc->bInterfaceProtocol : |
531 | unusual_dev->useTransport; | |
7e4d6c38 | 532 | us->fflags = USB_US_ORIG_FLAGS(id->driver_info); |
d4f373e5 | 533 | adjust_quirks(us); |
1da177e4 | 534 | |
7e4d6c38 | 535 | if (us->fflags & US_FL_IGNORE_DEVICE) { |
cbd3af54 | 536 | dev_info(pdev, "device ignored\n"); |
3c332422 DD |
537 | return -ENODEV; |
538 | } | |
539 | ||
1da177e4 LT |
540 | /* |
541 | * This flag is only needed when we're in high-speed, so let's | |
542 | * disable it if we're in full-speed | |
543 | */ | |
544 | if (dev->speed != USB_SPEED_HIGH) | |
7e4d6c38 | 545 | us->fflags &= ~US_FL_GO_SLOW; |
1da177e4 | 546 | |
39f2f080 FC |
547 | if (us->fflags) |
548 | dev_info(pdev, "Quirks match for vid %04x pid %04x: %lx\n", | |
549 | le16_to_cpu(dev->descriptor.idVendor), | |
550 | le16_to_cpu(dev->descriptor.idProduct), | |
551 | us->fflags); | |
552 | ||
1da177e4 LT |
553 | /* Log a message if a non-generic unusual_dev entry contains an |
554 | * unnecessary subclass or protocol override. This may stimulate | |
555 | * reports from users that will help us remove unneeded entries | |
556 | * from the unusual_devs.h table. | |
557 | */ | |
558 | if (id->idVendor || id->idProduct) { | |
4c4c9432 | 559 | static const char *msgs[3] = { |
1da177e4 LT |
560 | "an unneeded SubClass entry", |
561 | "an unneeded Protocol entry", | |
562 | "unneeded SubClass and Protocol entries"}; | |
563 | struct usb_device_descriptor *ddesc = &dev->descriptor; | |
564 | int msg = -1; | |
565 | ||
8fa7fd74 | 566 | if (unusual_dev->useProtocol != USB_SC_DEVICE && |
1da177e4 LT |
567 | us->subclass == idesc->bInterfaceSubClass) |
568 | msg += 1; | |
8fa7fd74 | 569 | if (unusual_dev->useTransport != USB_PR_DEVICE && |
1da177e4 LT |
570 | us->protocol == idesc->bInterfaceProtocol) |
571 | msg += 2; | |
7e4d6c38 | 572 | if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE)) |
cbd3af54 FC |
573 | dev_notice(pdev, "This device " |
574 | "(%04x,%04x,%04x S %02x P %02x)" | |
575 | " has %s in unusual_devs.h (kernel" | |
576 | " %s)\n" | |
577 | " Please send a copy of this message to " | |
578 | "<linux-usb@vger.kernel.org> and " | |
579 | "<usb-storage@lists.one-eyed-alien.net>\n", | |
580 | le16_to_cpu(ddesc->idVendor), | |
581 | le16_to_cpu(ddesc->idProduct), | |
582 | le16_to_cpu(ddesc->bcdDevice), | |
583 | idesc->bInterfaceSubClass, | |
584 | idesc->bInterfaceProtocol, | |
585 | msgs[msg], | |
586 | utsname()->release); | |
1da177e4 | 587 | } |
3c332422 DD |
588 | |
589 | return 0; | |
1da177e4 LT |
590 | } |
591 | ||
592 | /* Get the transport settings */ | |
e6e244b6 | 593 | static void get_transport(struct us_data *us) |
1da177e4 LT |
594 | { |
595 | switch (us->protocol) { | |
8fa7fd74 | 596 | case USB_PR_CB: |
1da177e4 LT |
597 | us->transport_name = "Control/Bulk"; |
598 | us->transport = usb_stor_CB_transport; | |
599 | us->transport_reset = usb_stor_CB_reset; | |
600 | us->max_lun = 7; | |
601 | break; | |
602 | ||
8fa7fd74 | 603 | case USB_PR_CBI: |
1da177e4 | 604 | us->transport_name = "Control/Bulk/Interrupt"; |
64648a9d | 605 | us->transport = usb_stor_CB_transport; |
1da177e4 LT |
606 | us->transport_reset = usb_stor_CB_reset; |
607 | us->max_lun = 7; | |
608 | break; | |
609 | ||
8fa7fd74 | 610 | case USB_PR_BULK: |
1da177e4 LT |
611 | us->transport_name = "Bulk"; |
612 | us->transport = usb_stor_Bulk_transport; | |
613 | us->transport_reset = usb_stor_Bulk_reset; | |
614 | break; | |
1da177e4 | 615 | } |
1da177e4 LT |
616 | } |
617 | ||
618 | /* Get the protocol settings */ | |
e6e244b6 | 619 | static void get_protocol(struct us_data *us) |
1da177e4 LT |
620 | { |
621 | switch (us->subclass) { | |
8fa7fd74 | 622 | case USB_SC_RBC: |
1da177e4 LT |
623 | us->protocol_name = "Reduced Block Commands (RBC)"; |
624 | us->proto_handler = usb_stor_transparent_scsi_command; | |
625 | break; | |
626 | ||
8fa7fd74 | 627 | case USB_SC_8020: |
1da177e4 | 628 | us->protocol_name = "8020i"; |
3dae5345 | 629 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
630 | us->max_lun = 0; |
631 | break; | |
632 | ||
8fa7fd74 | 633 | case USB_SC_QIC: |
1da177e4 | 634 | us->protocol_name = "QIC-157"; |
3dae5345 | 635 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
636 | us->max_lun = 0; |
637 | break; | |
638 | ||
8fa7fd74 | 639 | case USB_SC_8070: |
1da177e4 | 640 | us->protocol_name = "8070i"; |
3dae5345 | 641 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
642 | us->max_lun = 0; |
643 | break; | |
644 | ||
8fa7fd74 | 645 | case USB_SC_SCSI: |
1da177e4 LT |
646 | us->protocol_name = "Transparent SCSI"; |
647 | us->proto_handler = usb_stor_transparent_scsi_command; | |
648 | break; | |
649 | ||
8fa7fd74 | 650 | case USB_SC_UFI: |
1da177e4 LT |
651 | us->protocol_name = "Uniform Floppy Interface (UFI)"; |
652 | us->proto_handler = usb_stor_ufi_command; | |
653 | break; | |
1da177e4 | 654 | } |
1da177e4 LT |
655 | } |
656 | ||
657 | /* Get the pipe settings */ | |
658 | static int get_pipes(struct us_data *us) | |
659 | { | |
660 | struct usb_host_interface *altsetting = | |
661 | us->pusb_intf->cur_altsetting; | |
662 | int i; | |
663 | struct usb_endpoint_descriptor *ep; | |
664 | struct usb_endpoint_descriptor *ep_in = NULL; | |
665 | struct usb_endpoint_descriptor *ep_out = NULL; | |
666 | struct usb_endpoint_descriptor *ep_int = NULL; | |
667 | ||
668 | /* | |
1096f780 | 669 | * Find the first endpoint of each type we need. |
1da177e4 | 670 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
1096f780 | 671 | * An optional interrupt-in is OK (necessary for CBI protocol). |
1da177e4 LT |
672 | * We will ignore any others. |
673 | */ | |
674 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { | |
675 | ep = &altsetting->endpoint[i].desc; | |
676 | ||
04720747 | 677 | if (usb_endpoint_xfer_bulk(ep)) { |
1096f780 AS |
678 | if (usb_endpoint_dir_in(ep)) { |
679 | if (!ep_in) | |
680 | ep_in = ep; | |
681 | } else { | |
682 | if (!ep_out) | |
683 | ep_out = ep; | |
684 | } | |
1da177e4 LT |
685 | } |
686 | ||
1096f780 AS |
687 | else if (usb_endpoint_is_int_in(ep)) { |
688 | if (!ep_int) | |
689 | ep_int = ep; | |
1da177e4 LT |
690 | } |
691 | } | |
692 | ||
8fa7fd74 | 693 | if (!ep_in || !ep_out || (us->protocol == USB_PR_CBI && !ep_int)) { |
1da177e4 LT |
694 | US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n"); |
695 | return -EIO; | |
696 | } | |
697 | ||
698 | /* Calculate and store the pipe values */ | |
699 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); | |
700 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); | |
701 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, | |
2e0fe709 | 702 | usb_endpoint_num(ep_out)); |
1da177e4 | 703 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, |
2e0fe709 | 704 | usb_endpoint_num(ep_in)); |
1da177e4 LT |
705 | if (ep_int) { |
706 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, | |
2e0fe709 | 707 | usb_endpoint_num(ep_int)); |
1da177e4 LT |
708 | us->ep_bInterval = ep_int->bInterval; |
709 | } | |
710 | return 0; | |
711 | } | |
712 | ||
713 | /* Initialize all the dynamic resources we need */ | |
714 | static int usb_stor_acquire_resources(struct us_data *us) | |
715 | { | |
716 | int p; | |
3f13e66e | 717 | struct task_struct *th; |
1da177e4 LT |
718 | |
719 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); | |
720 | if (!us->current_urb) { | |
721 | US_DEBUGP("URB allocation failed\n"); | |
722 | return -ENOMEM; | |
723 | } | |
724 | ||
1da177e4 LT |
725 | /* Just before we start our control thread, initialize |
726 | * the device if it needs initialization */ | |
b876aef7 AS |
727 | if (us->unusual_dev->initFunction) { |
728 | p = us->unusual_dev->initFunction(us); | |
729 | if (p) | |
730 | return p; | |
731 | } | |
1da177e4 LT |
732 | |
733 | /* Start up our control thread */ | |
ed76cacb | 734 | th = kthread_run(usb_stor_control_thread, us, "usb-storage"); |
3f13e66e | 735 | if (IS_ERR(th)) { |
cbd3af54 FC |
736 | dev_warn(&us->pusb_intf->dev, |
737 | "Unable to start control thread\n"); | |
3f13e66e | 738 | return PTR_ERR(th); |
1da177e4 | 739 | } |
ed76cacb | 740 | us->ctl_thread = th; |
1da177e4 LT |
741 | |
742 | return 0; | |
743 | } | |
744 | ||
745 | /* Release all our dynamic resources */ | |
746 | static void usb_stor_release_resources(struct us_data *us) | |
747 | { | |
441b62c1 | 748 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
749 | |
750 | /* Tell the control thread to exit. The SCSI host must | |
543f7810 AS |
751 | * already have been removed and the DISCONNECTING flag set |
752 | * so that we won't accept any more commands. | |
1da177e4 LT |
753 | */ |
754 | US_DEBUGP("-- sending exit command to thread\n"); | |
7119e3c3 | 755 | complete(&us->cmnd_ready); |
ed76cacb AS |
756 | if (us->ctl_thread) |
757 | kthread_stop(us->ctl_thread); | |
1da177e4 LT |
758 | |
759 | /* Call the destructor routine, if it exists */ | |
760 | if (us->extra_destructor) { | |
761 | US_DEBUGP("-- calling extra_destructor()\n"); | |
762 | us->extra_destructor(us->extra); | |
763 | } | |
764 | ||
765 | /* Free the extra data and the URB */ | |
766 | kfree(us->extra); | |
767 | usb_free_urb(us->current_urb); | |
768 | } | |
769 | ||
770 | /* Dissociate from the USB device */ | |
771 | static void dissociate_dev(struct us_data *us) | |
772 | { | |
441b62c1 | 773 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 | 774 | |
0ede76fc AS |
775 | /* Free the buffers */ |
776 | kfree(us->cr); | |
997ea58e | 777 | usb_free_coherent(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, us->iobuf_dma); |
1da177e4 LT |
778 | |
779 | /* Remove our private data from the interface */ | |
780 | usb_set_intfdata(us->pusb_intf, NULL); | |
781 | } | |
782 | ||
543f7810 AS |
783 | /* First stage of disconnect processing: stop SCSI scanning, |
784 | * remove the host, and stop accepting new commands | |
785 | */ | |
77f46328 MD |
786 | static void quiesce_and_remove_host(struct us_data *us) |
787 | { | |
eecd11ed AS |
788 | struct Scsi_Host *host = us_to_host(us); |
789 | ||
543f7810 AS |
790 | /* If the device is really gone, cut short reset delays */ |
791 | if (us->pusb_dev->state == USB_STATE_NOTATTACHED) | |
792 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); | |
77f46328 | 793 | |
543f7810 AS |
794 | /* Prevent SCSI-scanning (if it hasn't started yet) |
795 | * and wait for the SCSI-scanning thread to stop. | |
796 | */ | |
797 | set_bit(US_FLIDX_DONT_SCAN, &us->dflags); | |
798 | wake_up(&us->delay_wait); | |
799 | wait_for_completion(&us->scanning_done); | |
26186ba7 | 800 | |
543f7810 AS |
801 | /* Removing the host will perform an orderly shutdown: caches |
802 | * synchronized, disks spun down, etc. | |
803 | */ | |
eecd11ed | 804 | scsi_remove_host(host); |
2f67cd5b | 805 | |
543f7810 AS |
806 | /* Prevent any new commands from being accepted and cut short |
807 | * reset delays. | |
808 | */ | |
809 | scsi_lock(host); | |
810 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); | |
811 | scsi_unlock(host); | |
812 | wake_up(&us->delay_wait); | |
77f46328 MD |
813 | } |
814 | ||
815 | /* Second stage of disconnect processing: deallocate all resources */ | |
816 | static void release_everything(struct us_data *us) | |
817 | { | |
818 | usb_stor_release_resources(us); | |
819 | dissociate_dev(us); | |
820 | ||
821 | /* Drop our reference to the host; the SCSI core will free it | |
822 | * (and "us" along with it) when the refcount becomes 0. */ | |
823 | scsi_host_put(us_to_host(us)); | |
824 | } | |
825 | ||
1da177e4 LT |
826 | /* Thread to carry out delayed SCSI-device scanning */ |
827 | static int usb_stor_scan_thread(void * __us) | |
828 | { | |
829 | struct us_data *us = (struct us_data *)__us; | |
cbd3af54 | 830 | struct device *dev = &us->pusb_intf->dev; |
1da177e4 | 831 | |
cbd3af54 | 832 | dev_dbg(dev, "device found\n"); |
1da177e4 | 833 | |
ec012476 TH |
834 | set_freezable(); |
835 | ||
f02fe890 SF |
836 | /* |
837 | * Wait for the timeout to expire or for a disconnect | |
838 | * | |
839 | * We can't freeze in this thread or we risk causing khubd to | |
840 | * fail to freeze, but we can't be non-freezable either. Nor can | |
841 | * khubd freeze while waiting for scanning to complete as it may | |
842 | * hold the device lock, causing a hang when suspending devices. | |
ec012476 TH |
843 | * So instead of using wait_event_freezable(), explicitly test |
844 | * for (DONT_SCAN || freezing) in interruptible wait and proceed | |
845 | * if any of DONT_SCAN, freezing or timeout has happened. | |
f02fe890 | 846 | */ |
1da177e4 | 847 | if (delay_use > 0) { |
cbd3af54 | 848 | dev_dbg(dev, "waiting for device to settle " |
9eb66f71 | 849 | "before scanning\n"); |
f02fe890 | 850 | wait_event_interruptible_timeout(us->delay_wait, |
ec012476 TH |
851 | test_bit(US_FLIDX_DONT_SCAN, &us->dflags) || |
852 | freezing(current), delay_use * HZ); | |
1da177e4 LT |
853 | } |
854 | ||
855 | /* If the device is still connected, perform the scanning */ | |
543f7810 | 856 | if (!test_bit(US_FLIDX_DONT_SCAN, &us->dflags)) { |
b876aef7 AS |
857 | |
858 | /* For bulk-only devices, determine the max LUN value */ | |
8fa7fd74 | 859 | if (us->protocol == USB_PR_BULK && |
7e4d6c38 | 860 | !(us->fflags & US_FL_SINGLE_LUN)) { |
4186ecf8 | 861 | mutex_lock(&us->dev_mutex); |
b876aef7 | 862 | us->max_lun = usb_stor_Bulk_max_lun(us); |
4186ecf8 | 863 | mutex_unlock(&us->dev_mutex); |
b876aef7 | 864 | } |
1da177e4 | 865 | scsi_scan_host(us_to_host(us)); |
cbd3af54 | 866 | dev_dbg(dev, "scan complete\n"); |
1da177e4 LT |
867 | |
868 | /* Should we unbind if no devices were detected? */ | |
869 | } | |
870 | ||
f283925f | 871 | usb_autopm_put_interface(us->pusb_intf); |
2f67cd5b | 872 | complete_and_exit(&us->scanning_done, 0); |
1da177e4 LT |
873 | } |
874 | ||
4c1bd3d7 DV |
875 | static unsigned int usb_stor_sg_tablesize(struct usb_interface *intf) |
876 | { | |
877 | struct usb_device *usb_dev = interface_to_usbdev(intf); | |
878 | ||
879 | if (usb_dev->bus->sg_tablesize) { | |
880 | return usb_dev->bus->sg_tablesize; | |
881 | } | |
882 | return SG_ALL; | |
883 | } | |
1da177e4 | 884 | |
e6e244b6 AS |
885 | /* First part of general USB mass-storage probing */ |
886 | int usb_stor_probe1(struct us_data **pus, | |
887 | struct usb_interface *intf, | |
888 | const struct usb_device_id *id, | |
889 | struct us_unusual_dev *unusual_dev) | |
1da177e4 LT |
890 | { |
891 | struct Scsi_Host *host; | |
892 | struct us_data *us; | |
1da177e4 | 893 | int result; |
a00828e9 | 894 | |
1da177e4 LT |
895 | US_DEBUGP("USB Mass Storage device detected\n"); |
896 | ||
897 | /* | |
898 | * Ask the SCSI layer to allocate a host structure, with extra | |
899 | * space at the end for our private us_data structure. | |
900 | */ | |
901 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); | |
902 | if (!host) { | |
cbd3af54 FC |
903 | dev_warn(&intf->dev, |
904 | "Unable to allocate the scsi host\n"); | |
1da177e4 LT |
905 | return -ENOMEM; |
906 | } | |
907 | ||
17f06022 RS |
908 | /* |
909 | * Allow 16-byte CDBs and thus > 2TB | |
910 | */ | |
911 | host->max_cmd_len = 16; | |
4c1bd3d7 | 912 | host->sg_tablesize = usb_stor_sg_tablesize(intf); |
e6e244b6 | 913 | *pus = us = host_to_us(host); |
1da177e4 | 914 | memset(us, 0, sizeof(struct us_data)); |
4186ecf8 | 915 | mutex_init(&(us->dev_mutex)); |
7119e3c3 | 916 | init_completion(&us->cmnd_ready); |
1da177e4 LT |
917 | init_completion(&(us->notify)); |
918 | init_waitqueue_head(&us->delay_wait); | |
2f67cd5b | 919 | init_completion(&us->scanning_done); |
1da177e4 LT |
920 | |
921 | /* Associate the us_data structure with the USB device */ | |
922 | result = associate_dev(us, intf); | |
923 | if (result) | |
924 | goto BadDevice; | |
925 | ||
e6e244b6 AS |
926 | /* Get the unusual_devs entries and the descriptors */ |
927 | result = get_device_info(us, id, unusual_dev); | |
3c332422 DD |
928 | if (result) |
929 | goto BadDevice; | |
1da177e4 | 930 | |
e6e244b6 AS |
931 | /* Get standard transport and protocol settings */ |
932 | get_transport(us); | |
933 | get_protocol(us); | |
934 | ||
935 | /* Give the caller a chance to fill in specialized transport | |
936 | * or protocol settings. | |
937 | */ | |
938 | return 0; | |
939 | ||
940 | BadDevice: | |
941 | US_DEBUGP("storage_probe() failed\n"); | |
942 | release_everything(us); | |
943 | return result; | |
944 | } | |
945 | EXPORT_SYMBOL_GPL(usb_stor_probe1); | |
946 | ||
947 | /* Second part of general USB mass-storage probing */ | |
948 | int usb_stor_probe2(struct us_data *us) | |
949 | { | |
950 | struct task_struct *th; | |
951 | int result; | |
cbd3af54 | 952 | struct device *dev = &us->pusb_intf->dev; |
e6e244b6 AS |
953 | |
954 | /* Make sure the transport and protocol have both been set */ | |
955 | if (!us->transport || !us->proto_handler) { | |
956 | result = -ENXIO; | |
1da177e4 | 957 | goto BadDevice; |
e6e244b6 AS |
958 | } |
959 | US_DEBUGP("Transport: %s\n", us->transport_name); | |
960 | US_DEBUGP("Protocol: %s\n", us->protocol_name); | |
961 | ||
962 | /* fix for single-lun devices */ | |
963 | if (us->fflags & US_FL_SINGLE_LUN) | |
964 | us->max_lun = 0; | |
965 | ||
966 | /* Find the endpoints and calculate pipe values */ | |
1da177e4 LT |
967 | result = get_pipes(us); |
968 | if (result) | |
969 | goto BadDevice; | |
970 | ||
21c13a4f AS |
971 | /* |
972 | * If the device returns invalid data for the first READ(10) | |
973 | * command, indicate the command should be retried. | |
974 | */ | |
975 | if (us->fflags & US_FL_INITIAL_READ10) | |
976 | set_bit(US_FLIDX_REDO_READ10, &us->dflags); | |
977 | ||
1da177e4 LT |
978 | /* Acquire all the other resources and add the host */ |
979 | result = usb_stor_acquire_resources(us); | |
980 | if (result) | |
981 | goto BadDevice; | |
00fa43ef MW |
982 | snprintf(us->scsi_name, sizeof(us->scsi_name), "usb-storage %s", |
983 | dev_name(&us->pusb_intf->dev)); | |
cbd3af54 | 984 | result = scsi_add_host(us_to_host(us), dev); |
1da177e4 | 985 | if (result) { |
cbd3af54 FC |
986 | dev_warn(dev, |
987 | "Unable to add the scsi host\n"); | |
1da177e4 LT |
988 | goto BadDevice; |
989 | } | |
990 | ||
991 | /* Start up the thread for delayed SCSI-device scanning */ | |
3f13e66e AS |
992 | th = kthread_create(usb_stor_scan_thread, us, "usb-stor-scan"); |
993 | if (IS_ERR(th)) { | |
cbd3af54 FC |
994 | dev_warn(dev, |
995 | "Unable to start the device-scanning thread\n"); | |
543f7810 | 996 | complete(&us->scanning_done); |
77f46328 | 997 | quiesce_and_remove_host(us); |
3f13e66e | 998 | result = PTR_ERR(th); |
1da177e4 LT |
999 | goto BadDevice; |
1000 | } | |
1da177e4 | 1001 | |
f283925f | 1002 | usb_autopm_get_interface_no_resume(us->pusb_intf); |
3f13e66e | 1003 | wake_up_process(th); |
1da177e4 LT |
1004 | |
1005 | return 0; | |
1006 | ||
1007 | /* We come here if there are any problems */ | |
1008 | BadDevice: | |
1009 | US_DEBUGP("storage_probe() failed\n"); | |
77f46328 | 1010 | release_everything(us); |
1da177e4 LT |
1011 | return result; |
1012 | } | |
e6e244b6 | 1013 | EXPORT_SYMBOL_GPL(usb_stor_probe2); |
1da177e4 | 1014 | |
e6e244b6 AS |
1015 | /* Handle a USB mass-storage disconnect */ |
1016 | void usb_stor_disconnect(struct usb_interface *intf) | |
1da177e4 LT |
1017 | { |
1018 | struct us_data *us = usb_get_intfdata(intf); | |
1019 | ||
1020 | US_DEBUGP("storage_disconnect() called\n"); | |
77f46328 MD |
1021 | quiesce_and_remove_host(us); |
1022 | release_everything(us); | |
1da177e4 | 1023 | } |
e6e244b6 AS |
1024 | EXPORT_SYMBOL_GPL(usb_stor_disconnect); |
1025 | ||
1026 | /* The main probe routine for standard devices */ | |
1027 | static int storage_probe(struct usb_interface *intf, | |
1028 | const struct usb_device_id *id) | |
1029 | { | |
1030 | struct us_data *us; | |
1031 | int result; | |
1032 | ||
1033 | /* | |
1034 | * If libusual is configured, let it decide whether a standard | |
1035 | * device should be handled by usb-storage or by ub. | |
1036 | * If the device isn't standard (is handled by a subdriver | |
1037 | * module) then don't accept it. | |
1038 | */ | |
1039 | if (usb_usual_check_type(id, USB_US_TYPE_STOR) || | |
1040 | usb_usual_ignore_device(intf)) | |
1041 | return -ENXIO; | |
1042 | ||
1043 | /* | |
1044 | * Call the general probe procedures. | |
1045 | * | |
1046 | * The unusual_dev_list array is parallel to the usb_storage_usb_ids | |
1047 | * table, so we use the index of the id entry to find the | |
1048 | * corresponding unusual_devs entry. | |
1049 | */ | |
1050 | result = usb_stor_probe1(&us, intf, id, | |
1051 | (id - usb_storage_usb_ids) + us_unusual_dev_list); | |
1052 | if (result) | |
1053 | return result; | |
1054 | ||
1055 | /* No special transport or protocol settings in the main module */ | |
1056 | ||
1057 | result = usb_stor_probe2(us); | |
1058 | return result; | |
1059 | } | |
1da177e4 LT |
1060 | |
1061 | /*********************************************************************** | |
1062 | * Initialization and registration | |
1063 | ***********************************************************************/ | |
1064 | ||
ce2596df | 1065 | static struct usb_driver usb_storage_driver = { |
ce2596df AS |
1066 | .name = "usb-storage", |
1067 | .probe = storage_probe, | |
e6e244b6 AS |
1068 | .disconnect = usb_stor_disconnect, |
1069 | .suspend = usb_stor_suspend, | |
1070 | .resume = usb_stor_resume, | |
1071 | .reset_resume = usb_stor_reset_resume, | |
1072 | .pre_reset = usb_stor_pre_reset, | |
1073 | .post_reset = usb_stor_post_reset, | |
1074 | .id_table = usb_storage_usb_ids, | |
f283925f | 1075 | .supports_autosuspend = 1, |
543f7810 | 1076 | .soft_unbind = 1, |
1a3a026b | 1077 | .no_dynamic_id = 1, |
ce2596df AS |
1078 | }; |
1079 | ||
1da177e4 LT |
1080 | static int __init usb_stor_init(void) |
1081 | { | |
1082 | int retval; | |
d4f373e5 | 1083 | |
cbd3af54 | 1084 | pr_info("Initializing USB Mass Storage driver...\n"); |
1da177e4 LT |
1085 | |
1086 | /* register the driver, return usb_register return code if error */ | |
1087 | retval = usb_register(&usb_storage_driver); | |
a00828e9 | 1088 | if (retval == 0) { |
cbd3af54 | 1089 | pr_info("USB Mass Storage support registered.\n"); |
a00828e9 PZ |
1090 | usb_usual_set_present(USB_US_TYPE_STOR); |
1091 | } | |
1da177e4 LT |
1092 | return retval; |
1093 | } | |
1094 | ||
1095 | static void __exit usb_stor_exit(void) | |
1096 | { | |
1097 | US_DEBUGP("usb_stor_exit() called\n"); | |
1098 | ||
1099 | /* Deregister the driver | |
1100 | * This will cause disconnect() to be called for each | |
1101 | * attached unit | |
1102 | */ | |
1103 | US_DEBUGP("-- calling usb_deregister()\n"); | |
1104 | usb_deregister(&usb_storage_driver) ; | |
1105 | ||
a00828e9 | 1106 | usb_usual_clear_present(USB_US_TYPE_STOR); |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | module_init(usb_stor_init); | |
1110 | module_exit(usb_stor_exit); |