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1da177e4 LT |
1 | /* Driver for USB Mass Storage compliant devices |
2 | * | |
3 | * $Id: usb.c,v 1.75 2002/04/22 03:39:43 mdharm Exp $ | |
4 | * | |
5 | * Current development and maintenance by: | |
6 | * (c) 1999-2003 Matthew Dharm (mdharm-usb@one-eyed-alien.net) | |
7 | * | |
8 | * Developed with the assistance of: | |
9 | * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) | |
10 | * (c) 2003 Alan Stern (stern@rowland.harvard.edu) | |
11 | * | |
12 | * Initial work by: | |
13 | * (c) 1999 Michael Gee (michael@linuxspecific.com) | |
14 | * | |
15 | * usb_device_id support by Adam J. Richter (adam@yggdrasil.com): | |
16 | * (c) 2000 Yggdrasil Computing, Inc. | |
17 | * | |
18 | * This driver is based on the 'USB Mass Storage Class' document. This | |
19 | * describes in detail the protocol used to communicate with such | |
20 | * devices. Clearly, the designers had SCSI and ATAPI commands in | |
21 | * mind when they created this document. The commands are all very | |
22 | * similar to commands in the SCSI-II and ATAPI specifications. | |
23 | * | |
24 | * It is important to note that in a number of cases this class | |
25 | * exhibits class-specific exemptions from the USB specification. | |
26 | * Notably the usage of NAK, STALL and ACK differs from the norm, in | |
27 | * that they are used to communicate wait, failed and OK on commands. | |
28 | * | |
29 | * Also, for certain devices, the interrupt endpoint is used to convey | |
30 | * status of a command. | |
31 | * | |
32 | * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more | |
33 | * information about this driver. | |
34 | * | |
35 | * This program is free software; you can redistribute it and/or modify it | |
36 | * under the terms of the GNU General Public License as published by the | |
37 | * Free Software Foundation; either version 2, or (at your option) any | |
38 | * later version. | |
39 | * | |
40 | * This program is distributed in the hope that it will be useful, but | |
41 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
42 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
43 | * General Public License for more details. | |
44 | * | |
45 | * You should have received a copy of the GNU General Public License along | |
46 | * with this program; if not, write to the Free Software Foundation, Inc., | |
47 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
48 | */ | |
49 | ||
1da177e4 LT |
50 | #include <linux/sched.h> |
51 | #include <linux/errno.h> | |
52 | #include <linux/suspend.h> | |
53 | #include <linux/module.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/slab.h> | |
3f13e66e | 56 | #include <linux/kthread.h> |
4186ecf8 | 57 | #include <linux/mutex.h> |
1da177e4 LT |
58 | |
59 | #include <scsi/scsi.h> | |
60 | #include <scsi/scsi_cmnd.h> | |
61 | #include <scsi/scsi_device.h> | |
62 | ||
63 | #include "usb.h" | |
64 | #include "scsiglue.h" | |
65 | #include "transport.h" | |
66 | #include "protocol.h" | |
67 | #include "debug.h" | |
68 | #include "initializers.h" | |
69 | ||
70 | #ifdef CONFIG_USB_STORAGE_USBAT | |
71 | #include "shuttle_usbat.h" | |
72 | #endif | |
73 | #ifdef CONFIG_USB_STORAGE_SDDR09 | |
74 | #include "sddr09.h" | |
75 | #endif | |
76 | #ifdef CONFIG_USB_STORAGE_SDDR55 | |
77 | #include "sddr55.h" | |
78 | #endif | |
79 | #ifdef CONFIG_USB_STORAGE_DPCM | |
80 | #include "dpcm.h" | |
81 | #endif | |
82 | #ifdef CONFIG_USB_STORAGE_FREECOM | |
83 | #include "freecom.h" | |
84 | #endif | |
85 | #ifdef CONFIG_USB_STORAGE_ISD200 | |
86 | #include "isd200.h" | |
87 | #endif | |
88 | #ifdef CONFIG_USB_STORAGE_DATAFAB | |
89 | #include "datafab.h" | |
90 | #endif | |
91 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT | |
92 | #include "jumpshot.h" | |
93 | #endif | |
34008dbf MD |
94 | #ifdef CONFIG_USB_STORAGE_ONETOUCH |
95 | #include "onetouch.h" | |
96 | #endif | |
e80b0fad MD |
97 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
98 | #include "alauda.h" | |
99 | #endif | |
1da177e4 LT |
100 | |
101 | /* Some informational data */ | |
102 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); | |
103 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); | |
104 | MODULE_LICENSE("GPL"); | |
105 | ||
106 | static unsigned int delay_use = 5; | |
107 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); | |
108 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); | |
109 | ||
110 | ||
111 | /* These are used to make sure the module doesn't unload before all the | |
112 | * threads have exited. | |
113 | */ | |
114 | static atomic_t total_threads = ATOMIC_INIT(0); | |
115 | static DECLARE_COMPLETION(threads_gone); | |
116 | ||
117 | ||
a00828e9 PZ |
118 | /* |
119 | * The entries in this table correspond, line for line, | |
120 | * with the entries of us_unusual_dev_list[]. | |
1da177e4 | 121 | */ |
a00828e9 | 122 | #ifndef CONFIG_USB_LIBUSUAL |
1da177e4 LT |
123 | |
124 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ | |
125 | vendorName, productName,useProtocol, useTransport, \ | |
126 | initFunction, flags) \ | |
a00828e9 PZ |
127 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin,bcdDeviceMax), \ |
128 | .driver_info = (flags)|(USB_US_TYPE_STOR<<24) } | |
129 | ||
130 | #define USUAL_DEV(useProto, useTrans, useType) \ | |
131 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, useProto, useTrans), \ | |
132 | .driver_info = (USB_US_TYPE_STOR<<24) } | |
1da177e4 LT |
133 | |
134 | static struct usb_device_id storage_usb_ids [] = { | |
135 | ||
136 | # include "unusual_devs.h" | |
137 | #undef UNUSUAL_DEV | |
a00828e9 | 138 | #undef USUAL_DEV |
1da177e4 LT |
139 | /* Terminating entry */ |
140 | { } | |
141 | }; | |
142 | ||
143 | MODULE_DEVICE_TABLE (usb, storage_usb_ids); | |
a00828e9 | 144 | #endif /* CONFIG_USB_LIBUSUAL */ |
1da177e4 LT |
145 | |
146 | /* This is the list of devices we recognize, along with their flag data */ | |
147 | ||
148 | /* The vendor name should be kept at eight characters or less, and | |
149 | * the product name should be kept at 16 characters or less. If a device | |
150 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names | |
151 | * normally generated by a device thorugh the INQUIRY response will be | |
152 | * taken from this list, and this is the reason for the above size | |
153 | * restriction. However, if the flag is not present, then you | |
154 | * are free to use as many characters as you like. | |
155 | */ | |
156 | ||
1da177e4 LT |
157 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
158 | vendor_name, product_name, use_protocol, use_transport, \ | |
159 | init_function, Flags) \ | |
160 | { \ | |
161 | .vendorName = vendor_name, \ | |
162 | .productName = product_name, \ | |
163 | .useProtocol = use_protocol, \ | |
164 | .useTransport = use_transport, \ | |
165 | .initFunction = init_function, \ | |
a00828e9 PZ |
166 | } |
167 | ||
168 | #define USUAL_DEV(use_protocol, use_transport, use_type) \ | |
169 | { \ | |
170 | .useProtocol = use_protocol, \ | |
171 | .useTransport = use_transport, \ | |
1da177e4 LT |
172 | } |
173 | ||
174 | static struct us_unusual_dev us_unusual_dev_list[] = { | |
175 | # include "unusual_devs.h" | |
176 | # undef UNUSUAL_DEV | |
a00828e9 | 177 | # undef USUAL_DEV |
1da177e4 LT |
178 | |
179 | /* Terminating entry */ | |
180 | { NULL } | |
181 | }; | |
182 | ||
ce2596df AS |
183 | |
184 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ | |
185 | ||
186 | static int storage_suspend(struct usb_interface *iface, pm_message_t message) | |
187 | { | |
188 | struct us_data *us = usb_get_intfdata(iface); | |
189 | ||
190 | /* Wait until no command is running */ | |
4186ecf8 | 191 | mutex_lock(&us->dev_mutex); |
ce2596df AS |
192 | |
193 | US_DEBUGP("%s\n", __FUNCTION__); | |
7931e1c6 MD |
194 | if (us->suspend_resume_hook) |
195 | (us->suspend_resume_hook)(us, US_SUSPEND); | |
ce2596df AS |
196 | iface->dev.power.power_state.event = message.event; |
197 | ||
198 | /* When runtime PM is working, we'll set a flag to indicate | |
199 | * whether we should autoresume when a SCSI request arrives. */ | |
200 | ||
4186ecf8 | 201 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
202 | return 0; |
203 | } | |
204 | ||
205 | static int storage_resume(struct usb_interface *iface) | |
206 | { | |
207 | struct us_data *us = usb_get_intfdata(iface); | |
208 | ||
4186ecf8 | 209 | mutex_lock(&us->dev_mutex); |
ce2596df AS |
210 | |
211 | US_DEBUGP("%s\n", __FUNCTION__); | |
7931e1c6 MD |
212 | if (us->suspend_resume_hook) |
213 | (us->suspend_resume_hook)(us, US_RESUME); | |
ce2596df AS |
214 | iface->dev.power.power_state.event = PM_EVENT_ON; |
215 | ||
4186ecf8 | 216 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
217 | return 0; |
218 | } | |
219 | ||
220 | #endif /* CONFIG_PM */ | |
1da177e4 | 221 | |
47104b0d AS |
222 | /* |
223 | * The next two routines get called just before and just after | |
224 | * a USB port reset, whether from this driver or a different one. | |
225 | */ | |
226 | ||
227 | static void storage_pre_reset(struct usb_interface *iface) | |
228 | { | |
229 | struct us_data *us = usb_get_intfdata(iface); | |
230 | ||
231 | US_DEBUGP("%s\n", __FUNCTION__); | |
232 | ||
233 | /* Make sure no command runs during the reset */ | |
234 | mutex_lock(&us->dev_mutex); | |
235 | } | |
236 | ||
237 | static void storage_post_reset(struct usb_interface *iface) | |
238 | { | |
239 | struct us_data *us = usb_get_intfdata(iface); | |
240 | ||
241 | US_DEBUGP("%s\n", __FUNCTION__); | |
242 | ||
243 | /* Report the reset to the SCSI core */ | |
244 | scsi_lock(us_to_host(us)); | |
245 | usb_stor_report_bus_reset(us); | |
246 | scsi_unlock(us_to_host(us)); | |
247 | ||
248 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
249 | * the device */ | |
250 | mutex_unlock(&us->dev_mutex); | |
251 | } | |
252 | ||
1da177e4 LT |
253 | /* |
254 | * fill_inquiry_response takes an unsigned char array (which must | |
255 | * be at least 36 characters) and populates the vendor name, | |
256 | * product name, and revision fields. Then the array is copied | |
257 | * into the SCSI command's response buffer (oddly enough | |
258 | * called request_buffer). data_len contains the length of the | |
259 | * data array, which again must be at least 36. | |
260 | */ | |
261 | ||
262 | void fill_inquiry_response(struct us_data *us, unsigned char *data, | |
263 | unsigned int data_len) | |
264 | { | |
265 | if (data_len<36) // You lose. | |
266 | return; | |
267 | ||
268 | if(data[0]&0x20) { /* USB device currently not connected. Return | |
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 | |
274 | device, it may return zeros or ASCII spaces | |
275 | (20h) in those fields until the data is | |
276 | available from the device."). */ | |
277 | memset(data+8,0,28); | |
278 | } else { | |
279 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); | |
280 | memcpy(data+8, us->unusual_dev->vendorName, | |
281 | strlen(us->unusual_dev->vendorName) > 8 ? 8 : | |
282 | strlen(us->unusual_dev->vendorName)); | |
283 | memcpy(data+16, us->unusual_dev->productName, | |
284 | strlen(us->unusual_dev->productName) > 16 ? 16 : | |
285 | strlen(us->unusual_dev->productName)); | |
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 | } | |
294 | ||
295 | static int usb_stor_control_thread(void * __us) | |
296 | { | |
297 | struct us_data *us = (struct us_data *)__us; | |
298 | struct Scsi_Host *host = us_to_host(us); | |
299 | ||
1da177e4 | 300 | current->flags |= PF_NOFREEZE; |
1da177e4 LT |
301 | |
302 | for(;;) { | |
303 | US_DEBUGP("*** thread sleeping.\n"); | |
304 | if(down_interruptible(&us->sema)) | |
305 | break; | |
306 | ||
307 | US_DEBUGP("*** thread awakened.\n"); | |
308 | ||
309 | /* lock the device pointers */ | |
4186ecf8 | 310 | mutex_lock(&(us->dev_mutex)); |
1da177e4 LT |
311 | |
312 | /* if the device has disconnected, we are free to exit */ | |
313 | if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { | |
314 | US_DEBUGP("-- exiting\n"); | |
4186ecf8 | 315 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
316 | break; |
317 | } | |
318 | ||
319 | /* lock access to the state */ | |
320 | scsi_lock(host); | |
321 | ||
322 | /* has the command timed out *already* ? */ | |
323 | if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) { | |
324 | us->srb->result = DID_ABORT << 16; | |
325 | goto SkipForAbort; | |
326 | } | |
327 | ||
328 | scsi_unlock(host); | |
329 | ||
330 | /* reject the command if the direction indicator | |
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 | */ | |
341 | else if (us->srb->device->id && | |
342 | !(us->flags & US_FL_SCM_MULT_TARG)) { | |
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 | ||
354 | /* Handle those devices which need us to fake | |
355 | * their inquiry data */ | |
356 | else if ((us->srb->cmnd[0] == INQUIRY) && | |
357 | (us->flags & US_FL_FIX_INQUIRY)) { | |
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); | |
371 | } | |
372 | ||
373 | /* lock access to the state */ | |
374 | scsi_lock(host); | |
375 | ||
376 | /* indicate that the command is done */ | |
377 | if (us->srb->result != DID_ABORT << 16) { | |
378 | US_DEBUGP("scsi cmd done, result=0x%x\n", | |
379 | us->srb->result); | |
380 | us->srb->scsi_done(us->srb); | |
381 | } else { | |
382 | SkipForAbort: | |
383 | US_DEBUGP("scsi command aborted\n"); | |
384 | } | |
385 | ||
386 | /* If an abort request was received we need to signal that | |
387 | * the abort has finished. The proper test for this is | |
388 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because | |
226173ed MD |
389 | * the timeout might have occurred after the command had |
390 | * already completed with a different result code. */ | |
391 | if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) { | |
1da177e4 LT |
392 | complete(&(us->notify)); |
393 | ||
226173ed MD |
394 | /* Allow USB transfers to resume */ |
395 | clear_bit(US_FLIDX_ABORTING, &us->flags); | |
396 | clear_bit(US_FLIDX_TIMED_OUT, &us->flags); | |
397 | } | |
398 | ||
1da177e4 LT |
399 | /* finished working on this command */ |
400 | us->srb = NULL; | |
401 | scsi_unlock(host); | |
402 | ||
403 | /* unlock the device pointers */ | |
4186ecf8 | 404 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
405 | } /* for (;;) */ |
406 | ||
407 | scsi_host_put(host); | |
408 | ||
409 | /* notify the exit routine that we're actually exiting now | |
410 | * | |
411 | * complete()/wait_for_completion() is similar to up()/down(), | |
412 | * except that complete() is safe in the case where the structure | |
413 | * is getting deleted in a parallel mode of execution (i.e. just | |
414 | * after the down() -- that's necessary for the thread-shutdown | |
415 | * case. | |
416 | * | |
417 | * complete_and_exit() goes even further than this -- it is safe in | |
418 | * the case that the thread of the caller is going away (not just | |
419 | * the structure) -- this is necessary for the module-remove case. | |
420 | * This is important in preemption kernels, which transfer the flow | |
421 | * of execution immediately upon a complete(). | |
422 | */ | |
423 | complete_and_exit(&threads_gone, 0); | |
424 | } | |
425 | ||
426 | /*********************************************************************** | |
427 | * Device probing and disconnecting | |
428 | ***********************************************************************/ | |
429 | ||
430 | /* Associate our private data with the USB device */ | |
431 | static int associate_dev(struct us_data *us, struct usb_interface *intf) | |
432 | { | |
433 | US_DEBUGP("-- %s\n", __FUNCTION__); | |
434 | ||
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; | |
439 | US_DEBUGP("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 | US_DEBUGP("Interface Subclass: 0x%02x, Protocol: 0x%02x\n", | |
444 | intf->cur_altsetting->desc.bInterfaceSubClass, | |
445 | intf->cur_altsetting->desc.bInterfaceProtocol); | |
446 | ||
447 | /* Store our private data in the interface */ | |
448 | usb_set_intfdata(intf, us); | |
449 | ||
450 | /* Allocate the device-related DMA-mapped buffers */ | |
451 | us->cr = usb_buffer_alloc(us->pusb_dev, sizeof(*us->cr), | |
452 | GFP_KERNEL, &us->cr_dma); | |
453 | if (!us->cr) { | |
454 | US_DEBUGP("usb_ctrlrequest allocation failed\n"); | |
455 | return -ENOMEM; | |
456 | } | |
457 | ||
458 | us->iobuf = usb_buffer_alloc(us->pusb_dev, US_IOBUF_SIZE, | |
459 | GFP_KERNEL, &us->iobuf_dma); | |
460 | if (!us->iobuf) { | |
461 | US_DEBUGP("I/O buffer allocation failed\n"); | |
462 | return -ENOMEM; | |
463 | } | |
bbafa466 AS |
464 | |
465 | us->sensebuf = kmalloc(US_SENSE_SIZE, GFP_KERNEL); | |
466 | if (!us->sensebuf) { | |
467 | US_DEBUGP("Sense buffer allocation failed\n"); | |
468 | return -ENOMEM; | |
469 | } | |
1da177e4 LT |
470 | return 0; |
471 | } | |
472 | ||
a00828e9 PZ |
473 | /* Find an unusual_dev descriptor (always succeeds in the current code) */ |
474 | static struct us_unusual_dev *find_unusual(const struct usb_device_id *id) | |
475 | { | |
476 | const int id_index = id - storage_usb_ids; | |
477 | return &us_unusual_dev_list[id_index]; | |
478 | } | |
479 | ||
1da177e4 | 480 | /* Get the unusual_devs entries and the string descriptors */ |
a00828e9 | 481 | static void get_device_info(struct us_data *us, const struct usb_device_id *id) |
1da177e4 LT |
482 | { |
483 | struct usb_device *dev = us->pusb_dev; | |
484 | struct usb_interface_descriptor *idesc = | |
485 | &us->pusb_intf->cur_altsetting->desc; | |
a00828e9 | 486 | struct us_unusual_dev *unusual_dev = find_unusual(id); |
1da177e4 LT |
487 | |
488 | /* Store the entries */ | |
489 | us->unusual_dev = unusual_dev; | |
490 | us->subclass = (unusual_dev->useProtocol == US_SC_DEVICE) ? | |
491 | idesc->bInterfaceSubClass : | |
492 | unusual_dev->useProtocol; | |
493 | us->protocol = (unusual_dev->useTransport == US_PR_DEVICE) ? | |
494 | idesc->bInterfaceProtocol : | |
495 | unusual_dev->useTransport; | |
a00828e9 | 496 | us->flags = USB_US_ORIG_FLAGS(id->driver_info); |
1da177e4 LT |
497 | |
498 | /* | |
499 | * This flag is only needed when we're in high-speed, so let's | |
500 | * disable it if we're in full-speed | |
501 | */ | |
502 | if (dev->speed != USB_SPEED_HIGH) | |
503 | us->flags &= ~US_FL_GO_SLOW; | |
504 | ||
505 | /* Log a message if a non-generic unusual_dev entry contains an | |
506 | * unnecessary subclass or protocol override. This may stimulate | |
507 | * reports from users that will help us remove unneeded entries | |
508 | * from the unusual_devs.h table. | |
509 | */ | |
510 | if (id->idVendor || id->idProduct) { | |
4c4c9432 | 511 | static const char *msgs[3] = { |
1da177e4 LT |
512 | "an unneeded SubClass entry", |
513 | "an unneeded Protocol entry", | |
514 | "unneeded SubClass and Protocol entries"}; | |
515 | struct usb_device_descriptor *ddesc = &dev->descriptor; | |
516 | int msg = -1; | |
517 | ||
518 | if (unusual_dev->useProtocol != US_SC_DEVICE && | |
519 | us->subclass == idesc->bInterfaceSubClass) | |
520 | msg += 1; | |
521 | if (unusual_dev->useTransport != US_PR_DEVICE && | |
522 | us->protocol == idesc->bInterfaceProtocol) | |
523 | msg += 2; | |
a00828e9 | 524 | if (msg >= 0 && !(us->flags & US_FL_NEED_OVERRIDE)) |
1da177e4 LT |
525 | printk(KERN_NOTICE USB_STORAGE "This device " |
526 | "(%04x,%04x,%04x S %02x P %02x)" | |
527 | " has %s in unusual_devs.h\n" | |
528 | " Please send a copy of this message to " | |
529 | "<linux-usb-devel@lists.sourceforge.net>\n", | |
530 | le16_to_cpu(ddesc->idVendor), | |
531 | le16_to_cpu(ddesc->idProduct), | |
532 | le16_to_cpu(ddesc->bcdDevice), | |
533 | idesc->bInterfaceSubClass, | |
534 | idesc->bInterfaceProtocol, | |
535 | msgs[msg]); | |
536 | } | |
537 | } | |
538 | ||
539 | /* Get the transport settings */ | |
540 | static int get_transport(struct us_data *us) | |
541 | { | |
542 | switch (us->protocol) { | |
543 | case US_PR_CB: | |
544 | us->transport_name = "Control/Bulk"; | |
545 | us->transport = usb_stor_CB_transport; | |
546 | us->transport_reset = usb_stor_CB_reset; | |
547 | us->max_lun = 7; | |
548 | break; | |
549 | ||
550 | case US_PR_CBI: | |
551 | us->transport_name = "Control/Bulk/Interrupt"; | |
552 | us->transport = usb_stor_CBI_transport; | |
553 | us->transport_reset = usb_stor_CB_reset; | |
554 | us->max_lun = 7; | |
555 | break; | |
556 | ||
557 | case US_PR_BULK: | |
558 | us->transport_name = "Bulk"; | |
559 | us->transport = usb_stor_Bulk_transport; | |
560 | us->transport_reset = usb_stor_Bulk_reset; | |
561 | break; | |
562 | ||
563 | #ifdef CONFIG_USB_STORAGE_USBAT | |
b7b1e655 DD |
564 | case US_PR_USBAT: |
565 | us->transport_name = "Shuttle USBAT"; | |
1da177e4 LT |
566 | us->transport = usbat_transport; |
567 | us->transport_reset = usb_stor_CB_reset; | |
568 | us->max_lun = 1; | |
569 | break; | |
570 | #endif | |
571 | ||
572 | #ifdef CONFIG_USB_STORAGE_SDDR09 | |
573 | case US_PR_EUSB_SDDR09: | |
574 | us->transport_name = "EUSB/SDDR09"; | |
575 | us->transport = sddr09_transport; | |
576 | us->transport_reset = usb_stor_CB_reset; | |
577 | us->max_lun = 0; | |
578 | break; | |
579 | #endif | |
580 | ||
581 | #ifdef CONFIG_USB_STORAGE_SDDR55 | |
582 | case US_PR_SDDR55: | |
583 | us->transport_name = "SDDR55"; | |
584 | us->transport = sddr55_transport; | |
585 | us->transport_reset = sddr55_reset; | |
586 | us->max_lun = 0; | |
587 | break; | |
588 | #endif | |
589 | ||
590 | #ifdef CONFIG_USB_STORAGE_DPCM | |
591 | case US_PR_DPCM_USB: | |
592 | us->transport_name = "Control/Bulk-EUSB/SDDR09"; | |
593 | us->transport = dpcm_transport; | |
594 | us->transport_reset = usb_stor_CB_reset; | |
595 | us->max_lun = 1; | |
596 | break; | |
597 | #endif | |
598 | ||
599 | #ifdef CONFIG_USB_STORAGE_FREECOM | |
600 | case US_PR_FREECOM: | |
601 | us->transport_name = "Freecom"; | |
602 | us->transport = freecom_transport; | |
603 | us->transport_reset = usb_stor_freecom_reset; | |
604 | us->max_lun = 0; | |
605 | break; | |
606 | #endif | |
607 | ||
608 | #ifdef CONFIG_USB_STORAGE_DATAFAB | |
609 | case US_PR_DATAFAB: | |
610 | us->transport_name = "Datafab Bulk-Only"; | |
611 | us->transport = datafab_transport; | |
612 | us->transport_reset = usb_stor_Bulk_reset; | |
613 | us->max_lun = 1; | |
614 | break; | |
615 | #endif | |
616 | ||
617 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT | |
618 | case US_PR_JUMPSHOT: | |
619 | us->transport_name = "Lexar Jumpshot Control/Bulk"; | |
620 | us->transport = jumpshot_transport; | |
621 | us->transport_reset = usb_stor_Bulk_reset; | |
622 | us->max_lun = 1; | |
623 | break; | |
624 | #endif | |
625 | ||
b383539e DD |
626 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
627 | case US_PR_ALAUDA: | |
628 | us->transport_name = "Alauda Control/Bulk"; | |
629 | us->transport = alauda_transport; | |
630 | us->transport_reset = usb_stor_Bulk_reset; | |
631 | us->max_lun = 1; | |
632 | break; | |
633 | #endif | |
634 | ||
1da177e4 LT |
635 | default: |
636 | return -EIO; | |
637 | } | |
638 | US_DEBUGP("Transport: %s\n", us->transport_name); | |
639 | ||
640 | /* fix for single-lun devices */ | |
641 | if (us->flags & US_FL_SINGLE_LUN) | |
642 | us->max_lun = 0; | |
643 | return 0; | |
644 | } | |
645 | ||
646 | /* Get the protocol settings */ | |
647 | static int get_protocol(struct us_data *us) | |
648 | { | |
649 | switch (us->subclass) { | |
650 | case US_SC_RBC: | |
651 | us->protocol_name = "Reduced Block Commands (RBC)"; | |
652 | us->proto_handler = usb_stor_transparent_scsi_command; | |
653 | break; | |
654 | ||
655 | case US_SC_8020: | |
656 | us->protocol_name = "8020i"; | |
657 | us->proto_handler = usb_stor_ATAPI_command; | |
658 | us->max_lun = 0; | |
659 | break; | |
660 | ||
661 | case US_SC_QIC: | |
662 | us->protocol_name = "QIC-157"; | |
663 | us->proto_handler = usb_stor_qic157_command; | |
664 | us->max_lun = 0; | |
665 | break; | |
666 | ||
667 | case US_SC_8070: | |
668 | us->protocol_name = "8070i"; | |
669 | us->proto_handler = usb_stor_ATAPI_command; | |
670 | us->max_lun = 0; | |
671 | break; | |
672 | ||
673 | case US_SC_SCSI: | |
674 | us->protocol_name = "Transparent SCSI"; | |
675 | us->proto_handler = usb_stor_transparent_scsi_command; | |
676 | break; | |
677 | ||
678 | case US_SC_UFI: | |
679 | us->protocol_name = "Uniform Floppy Interface (UFI)"; | |
680 | us->proto_handler = usb_stor_ufi_command; | |
681 | break; | |
682 | ||
683 | #ifdef CONFIG_USB_STORAGE_ISD200 | |
684 | case US_SC_ISD200: | |
685 | us->protocol_name = "ISD200 ATA/ATAPI"; | |
686 | us->proto_handler = isd200_ata_command; | |
687 | break; | |
688 | #endif | |
689 | ||
690 | default: | |
691 | return -EIO; | |
692 | } | |
693 | US_DEBUGP("Protocol: %s\n", us->protocol_name); | |
694 | return 0; | |
695 | } | |
696 | ||
697 | /* Get the pipe settings */ | |
698 | static int get_pipes(struct us_data *us) | |
699 | { | |
700 | struct usb_host_interface *altsetting = | |
701 | us->pusb_intf->cur_altsetting; | |
702 | int i; | |
703 | struct usb_endpoint_descriptor *ep; | |
704 | struct usb_endpoint_descriptor *ep_in = NULL; | |
705 | struct usb_endpoint_descriptor *ep_out = NULL; | |
706 | struct usb_endpoint_descriptor *ep_int = NULL; | |
707 | ||
708 | /* | |
709 | * Find the endpoints we need. | |
710 | * We are expecting a minimum of 2 endpoints - in and out (bulk). | |
711 | * An optional interrupt is OK (necessary for CBI protocol). | |
712 | * We will ignore any others. | |
713 | */ | |
714 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { | |
715 | ep = &altsetting->endpoint[i].desc; | |
716 | ||
717 | /* Is it a BULK endpoint? */ | |
718 | if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
719 | == USB_ENDPOINT_XFER_BULK) { | |
720 | /* BULK in or out? */ | |
721 | if (ep->bEndpointAddress & USB_DIR_IN) | |
722 | ep_in = ep; | |
723 | else | |
724 | ep_out = ep; | |
725 | } | |
726 | ||
727 | /* Is it an interrupt endpoint? */ | |
728 | else if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
729 | == USB_ENDPOINT_XFER_INT) { | |
730 | ep_int = ep; | |
731 | } | |
732 | } | |
733 | ||
734 | if (!ep_in || !ep_out || (us->protocol == US_PR_CBI && !ep_int)) { | |
735 | US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n"); | |
736 | return -EIO; | |
737 | } | |
738 | ||
739 | /* Calculate and store the pipe values */ | |
740 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); | |
741 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); | |
742 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, | |
743 | ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
744 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, | |
745 | ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
746 | if (ep_int) { | |
747 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, | |
748 | ep_int->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
749 | us->ep_bInterval = ep_int->bInterval; | |
750 | } | |
751 | return 0; | |
752 | } | |
753 | ||
754 | /* Initialize all the dynamic resources we need */ | |
755 | static int usb_stor_acquire_resources(struct us_data *us) | |
756 | { | |
757 | int p; | |
3f13e66e | 758 | struct task_struct *th; |
1da177e4 LT |
759 | |
760 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); | |
761 | if (!us->current_urb) { | |
762 | US_DEBUGP("URB allocation failed\n"); | |
763 | return -ENOMEM; | |
764 | } | |
765 | ||
1da177e4 LT |
766 | /* Just before we start our control thread, initialize |
767 | * the device if it needs initialization */ | |
b876aef7 AS |
768 | if (us->unusual_dev->initFunction) { |
769 | p = us->unusual_dev->initFunction(us); | |
770 | if (p) | |
771 | return p; | |
772 | } | |
1da177e4 LT |
773 | |
774 | /* Start up our control thread */ | |
3f13e66e AS |
775 | th = kthread_create(usb_stor_control_thread, us, "usb-storage"); |
776 | if (IS_ERR(th)) { | |
1da177e4 LT |
777 | printk(KERN_WARNING USB_STORAGE |
778 | "Unable to start control thread\n"); | |
3f13e66e | 779 | return PTR_ERR(th); |
1da177e4 | 780 | } |
1da177e4 | 781 | |
3f13e66e AS |
782 | /* Take a reference to the host for the control thread and |
783 | * count it among all the threads we have launched. Then | |
784 | * start it up. */ | |
785 | scsi_host_get(us_to_host(us)); | |
786 | atomic_inc(&total_threads); | |
787 | wake_up_process(th); | |
1da177e4 LT |
788 | |
789 | return 0; | |
790 | } | |
791 | ||
792 | /* Release all our dynamic resources */ | |
793 | static void usb_stor_release_resources(struct us_data *us) | |
794 | { | |
795 | US_DEBUGP("-- %s\n", __FUNCTION__); | |
796 | ||
797 | /* Tell the control thread to exit. The SCSI host must | |
798 | * already have been removed so it won't try to queue | |
799 | * any more commands. | |
800 | */ | |
801 | US_DEBUGP("-- sending exit command to thread\n"); | |
77f46328 | 802 | set_bit(US_FLIDX_DISCONNECTING, &us->flags); |
1da177e4 LT |
803 | up(&us->sema); |
804 | ||
805 | /* Call the destructor routine, if it exists */ | |
806 | if (us->extra_destructor) { | |
807 | US_DEBUGP("-- calling extra_destructor()\n"); | |
808 | us->extra_destructor(us->extra); | |
809 | } | |
810 | ||
811 | /* Free the extra data and the URB */ | |
812 | kfree(us->extra); | |
813 | usb_free_urb(us->current_urb); | |
814 | } | |
815 | ||
816 | /* Dissociate from the USB device */ | |
817 | static void dissociate_dev(struct us_data *us) | |
818 | { | |
819 | US_DEBUGP("-- %s\n", __FUNCTION__); | |
820 | ||
bbafa466 AS |
821 | kfree(us->sensebuf); |
822 | ||
1da177e4 LT |
823 | /* Free the device-related DMA-mapped buffers */ |
824 | if (us->cr) | |
825 | usb_buffer_free(us->pusb_dev, sizeof(*us->cr), us->cr, | |
826 | us->cr_dma); | |
827 | if (us->iobuf) | |
828 | usb_buffer_free(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, | |
829 | us->iobuf_dma); | |
830 | ||
831 | /* Remove our private data from the interface */ | |
832 | usb_set_intfdata(us->pusb_intf, NULL); | |
833 | } | |
834 | ||
77f46328 MD |
835 | /* First stage of disconnect processing: stop all commands and remove |
836 | * the host */ | |
837 | static void quiesce_and_remove_host(struct us_data *us) | |
838 | { | |
839 | /* Prevent new USB transfers, stop the current command, and | |
840 | * interrupt a SCSI-scan or device-reset delay */ | |
841 | set_bit(US_FLIDX_DISCONNECTING, &us->flags); | |
842 | usb_stor_stop_transport(us); | |
843 | wake_up(&us->delay_wait); | |
844 | ||
845 | /* It doesn't matter if the SCSI-scanning thread is still running. | |
846 | * The thread will exit when it sees the DISCONNECTING flag. */ | |
847 | ||
848 | /* Wait for the current command to finish, then remove the host */ | |
4186ecf8 AV |
849 | mutex_lock(&us->dev_mutex); |
850 | mutex_unlock(&us->dev_mutex); | |
26186ba7 MD |
851 | |
852 | /* queuecommand won't accept any new commands and the control | |
853 | * thread won't execute a previously-queued command. If there | |
854 | * is such a command pending, complete it with an error. */ | |
855 | if (us->srb) { | |
856 | us->srb->result = DID_NO_CONNECT << 16; | |
857 | scsi_lock(us_to_host(us)); | |
858 | us->srb->scsi_done(us->srb); | |
859 | us->srb = NULL; | |
860 | scsi_unlock(us_to_host(us)); | |
861 | } | |
862 | ||
863 | /* Now we own no commands so it's safe to remove the SCSI host */ | |
77f46328 MD |
864 | scsi_remove_host(us_to_host(us)); |
865 | } | |
866 | ||
867 | /* Second stage of disconnect processing: deallocate all resources */ | |
868 | static void release_everything(struct us_data *us) | |
869 | { | |
870 | usb_stor_release_resources(us); | |
871 | dissociate_dev(us); | |
872 | ||
873 | /* Drop our reference to the host; the SCSI core will free it | |
874 | * (and "us" along with it) when the refcount becomes 0. */ | |
875 | scsi_host_put(us_to_host(us)); | |
876 | } | |
877 | ||
1da177e4 LT |
878 | /* Thread to carry out delayed SCSI-device scanning */ |
879 | static int usb_stor_scan_thread(void * __us) | |
880 | { | |
881 | struct us_data *us = (struct us_data *)__us; | |
882 | ||
1da177e4 LT |
883 | printk(KERN_DEBUG |
884 | "usb-storage: device found at %d\n", us->pusb_dev->devnum); | |
885 | ||
886 | /* Wait for the timeout to expire or for a disconnect */ | |
887 | if (delay_use > 0) { | |
888 | printk(KERN_DEBUG "usb-storage: waiting for device " | |
889 | "to settle before scanning\n"); | |
890 | retry: | |
891 | wait_event_interruptible_timeout(us->delay_wait, | |
892 | test_bit(US_FLIDX_DISCONNECTING, &us->flags), | |
893 | delay_use * HZ); | |
3e1d1d28 | 894 | if (try_to_freeze()) |
1da177e4 | 895 | goto retry; |
1da177e4 LT |
896 | } |
897 | ||
898 | /* If the device is still connected, perform the scanning */ | |
899 | if (!test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { | |
b876aef7 AS |
900 | |
901 | /* For bulk-only devices, determine the max LUN value */ | |
902 | if (us->protocol == US_PR_BULK && | |
903 | !(us->flags & US_FL_SINGLE_LUN)) { | |
4186ecf8 | 904 | mutex_lock(&us->dev_mutex); |
b876aef7 | 905 | us->max_lun = usb_stor_Bulk_max_lun(us); |
4186ecf8 | 906 | mutex_unlock(&us->dev_mutex); |
b876aef7 | 907 | } |
1da177e4 LT |
908 | scsi_scan_host(us_to_host(us)); |
909 | printk(KERN_DEBUG "usb-storage: device scan complete\n"); | |
910 | ||
911 | /* Should we unbind if no devices were detected? */ | |
912 | } | |
913 | ||
914 | scsi_host_put(us_to_host(us)); | |
915 | complete_and_exit(&threads_gone, 0); | |
916 | } | |
917 | ||
918 | ||
919 | /* Probe to see if we can drive a newly-connected USB device */ | |
920 | static int storage_probe(struct usb_interface *intf, | |
921 | const struct usb_device_id *id) | |
922 | { | |
923 | struct Scsi_Host *host; | |
924 | struct us_data *us; | |
1da177e4 | 925 | int result; |
3f13e66e | 926 | struct task_struct *th; |
1da177e4 | 927 | |
a00828e9 PZ |
928 | if (usb_usual_check_type(id, USB_US_TYPE_STOR)) |
929 | return -ENXIO; | |
930 | ||
1da177e4 LT |
931 | US_DEBUGP("USB Mass Storage device detected\n"); |
932 | ||
933 | /* | |
934 | * Ask the SCSI layer to allocate a host structure, with extra | |
935 | * space at the end for our private us_data structure. | |
936 | */ | |
937 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); | |
938 | if (!host) { | |
939 | printk(KERN_WARNING USB_STORAGE | |
940 | "Unable to allocate the scsi host\n"); | |
941 | return -ENOMEM; | |
942 | } | |
943 | ||
944 | us = host_to_us(host); | |
945 | memset(us, 0, sizeof(struct us_data)); | |
4186ecf8 | 946 | mutex_init(&(us->dev_mutex)); |
1da177e4 LT |
947 | init_MUTEX_LOCKED(&(us->sema)); |
948 | init_completion(&(us->notify)); | |
949 | init_waitqueue_head(&us->delay_wait); | |
950 | ||
951 | /* Associate the us_data structure with the USB device */ | |
952 | result = associate_dev(us, intf); | |
953 | if (result) | |
954 | goto BadDevice; | |
955 | ||
956 | /* | |
957 | * Get the unusual_devs entries and the descriptors | |
958 | * | |
959 | * id_index is calculated in the declaration to be the index number | |
960 | * of the match from the usb_device_id table, so we can find the | |
961 | * corresponding entry in the private table. | |
962 | */ | |
a00828e9 | 963 | get_device_info(us, id); |
1da177e4 | 964 | |
1da177e4 LT |
965 | /* Get the transport, protocol, and pipe settings */ |
966 | result = get_transport(us); | |
967 | if (result) | |
968 | goto BadDevice; | |
969 | result = get_protocol(us); | |
970 | if (result) | |
971 | goto BadDevice; | |
972 | result = get_pipes(us); | |
973 | if (result) | |
974 | goto BadDevice; | |
975 | ||
976 | /* Acquire all the other resources and add the host */ | |
977 | result = usb_stor_acquire_resources(us); | |
978 | if (result) | |
979 | goto BadDevice; | |
980 | result = scsi_add_host(host, &intf->dev); | |
981 | if (result) { | |
982 | printk(KERN_WARNING USB_STORAGE | |
983 | "Unable to add the scsi host\n"); | |
984 | goto BadDevice; | |
985 | } | |
986 | ||
987 | /* Start up the thread for delayed SCSI-device scanning */ | |
3f13e66e AS |
988 | th = kthread_create(usb_stor_scan_thread, us, "usb-stor-scan"); |
989 | if (IS_ERR(th)) { | |
1da177e4 LT |
990 | printk(KERN_WARNING USB_STORAGE |
991 | "Unable to start the device-scanning thread\n"); | |
77f46328 | 992 | quiesce_and_remove_host(us); |
3f13e66e | 993 | result = PTR_ERR(th); |
1da177e4 LT |
994 | goto BadDevice; |
995 | } | |
1da177e4 | 996 | |
3f13e66e AS |
997 | /* Take a reference to the host for the scanning thread and |
998 | * count it among all the threads we have launched. Then | |
999 | * start it up. */ | |
1000 | scsi_host_get(us_to_host(us)); | |
1001 | atomic_inc(&total_threads); | |
1002 | wake_up_process(th); | |
1da177e4 LT |
1003 | |
1004 | return 0; | |
1005 | ||
1006 | /* We come here if there are any problems */ | |
1007 | BadDevice: | |
1008 | US_DEBUGP("storage_probe() failed\n"); | |
77f46328 | 1009 | release_everything(us); |
1da177e4 LT |
1010 | return result; |
1011 | } | |
1012 | ||
1013 | /* Handle a disconnect event from the USB core */ | |
1014 | static void storage_disconnect(struct usb_interface *intf) | |
1015 | { | |
1016 | struct us_data *us = usb_get_intfdata(intf); | |
1017 | ||
1018 | US_DEBUGP("storage_disconnect() called\n"); | |
77f46328 MD |
1019 | quiesce_and_remove_host(us); |
1020 | release_everything(us); | |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | /*********************************************************************** | |
1024 | * Initialization and registration | |
1025 | ***********************************************************************/ | |
1026 | ||
ce2596df | 1027 | static struct usb_driver usb_storage_driver = { |
ce2596df AS |
1028 | .name = "usb-storage", |
1029 | .probe = storage_probe, | |
1030 | .disconnect = storage_disconnect, | |
1031 | #ifdef CONFIG_PM | |
1032 | .suspend = storage_suspend, | |
1033 | .resume = storage_resume, | |
1034 | #endif | |
47104b0d AS |
1035 | .pre_reset = storage_pre_reset, |
1036 | .post_reset = storage_post_reset, | |
ce2596df AS |
1037 | .id_table = storage_usb_ids, |
1038 | }; | |
1039 | ||
1da177e4 LT |
1040 | static int __init usb_stor_init(void) |
1041 | { | |
1042 | int retval; | |
1043 | printk(KERN_INFO "Initializing USB Mass Storage driver...\n"); | |
1044 | ||
1045 | /* register the driver, return usb_register return code if error */ | |
1046 | retval = usb_register(&usb_storage_driver); | |
a00828e9 | 1047 | if (retval == 0) { |
1da177e4 | 1048 | printk(KERN_INFO "USB Mass Storage support registered.\n"); |
a00828e9 PZ |
1049 | usb_usual_set_present(USB_US_TYPE_STOR); |
1050 | } | |
1da177e4 LT |
1051 | return retval; |
1052 | } | |
1053 | ||
1054 | static void __exit usb_stor_exit(void) | |
1055 | { | |
1056 | US_DEBUGP("usb_stor_exit() called\n"); | |
1057 | ||
1058 | /* Deregister the driver | |
1059 | * This will cause disconnect() to be called for each | |
1060 | * attached unit | |
1061 | */ | |
1062 | US_DEBUGP("-- calling usb_deregister()\n"); | |
1063 | usb_deregister(&usb_storage_driver) ; | |
1064 | ||
1065 | /* Don't return until all of our control and scanning threads | |
1066 | * have exited. Since each thread signals threads_gone as its | |
1067 | * last act, we have to call wait_for_completion the right number | |
1068 | * of times. | |
1069 | */ | |
1070 | while (atomic_read(&total_threads) > 0) { | |
1071 | wait_for_completion(&threads_gone); | |
1072 | atomic_dec(&total_threads); | |
1073 | } | |
a00828e9 PZ |
1074 | |
1075 | usb_usual_clear_present(USB_US_TYPE_STOR); | |
1da177e4 LT |
1076 | } |
1077 | ||
1078 | module_init(usb_stor_init); | |
1079 | module_exit(usb_stor_exit); |