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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> | |
7dfb7103 | 52 | #include <linux/freezer.h> |
1da177e4 LT |
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> |
00f8b0c1 | 58 | #include <linux/utsname.h> |
1da177e4 LT |
59 | |
60 | #include <scsi/scsi.h> | |
61 | #include <scsi/scsi_cmnd.h> | |
62 | #include <scsi/scsi_device.h> | |
63 | ||
64 | #include "usb.h" | |
65 | #include "scsiglue.h" | |
66 | #include "transport.h" | |
67 | #include "protocol.h" | |
68 | #include "debug.h" | |
69 | #include "initializers.h" | |
70 | ||
71 | #ifdef CONFIG_USB_STORAGE_USBAT | |
72 | #include "shuttle_usbat.h" | |
73 | #endif | |
74 | #ifdef CONFIG_USB_STORAGE_SDDR09 | |
75 | #include "sddr09.h" | |
76 | #endif | |
77 | #ifdef CONFIG_USB_STORAGE_SDDR55 | |
78 | #include "sddr55.h" | |
79 | #endif | |
80 | #ifdef CONFIG_USB_STORAGE_DPCM | |
81 | #include "dpcm.h" | |
82 | #endif | |
83 | #ifdef CONFIG_USB_STORAGE_FREECOM | |
84 | #include "freecom.h" | |
85 | #endif | |
86 | #ifdef CONFIG_USB_STORAGE_ISD200 | |
87 | #include "isd200.h" | |
88 | #endif | |
89 | #ifdef CONFIG_USB_STORAGE_DATAFAB | |
90 | #include "datafab.h" | |
91 | #endif | |
92 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT | |
93 | #include "jumpshot.h" | |
94 | #endif | |
34008dbf MD |
95 | #ifdef CONFIG_USB_STORAGE_ONETOUCH |
96 | #include "onetouch.h" | |
97 | #endif | |
e80b0fad MD |
98 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
99 | #include "alauda.h" | |
100 | #endif | |
dfe0d3ba MD |
101 | #ifdef CONFIG_USB_STORAGE_KARMA |
102 | #include "karma.h" | |
103 | #endif | |
1da177e4 LT |
104 | |
105 | /* Some informational data */ | |
106 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); | |
107 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); | |
108 | MODULE_LICENSE("GPL"); | |
109 | ||
110 | static unsigned int delay_use = 5; | |
111 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); | |
112 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); | |
113 | ||
114 | ||
115 | /* These are used to make sure the module doesn't unload before all the | |
116 | * threads have exited. | |
117 | */ | |
118 | static atomic_t total_threads = ATOMIC_INIT(0); | |
119 | static DECLARE_COMPLETION(threads_gone); | |
120 | ||
121 | ||
a00828e9 PZ |
122 | /* |
123 | * The entries in this table correspond, line for line, | |
124 | * with the entries of us_unusual_dev_list[]. | |
1da177e4 | 125 | */ |
a00828e9 | 126 | #ifndef CONFIG_USB_LIBUSUAL |
1da177e4 LT |
127 | |
128 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ | |
129 | vendorName, productName,useProtocol, useTransport, \ | |
130 | initFunction, flags) \ | |
a00828e9 PZ |
131 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin,bcdDeviceMax), \ |
132 | .driver_info = (flags)|(USB_US_TYPE_STOR<<24) } | |
133 | ||
134 | #define USUAL_DEV(useProto, useTrans, useType) \ | |
135 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, useProto, useTrans), \ | |
136 | .driver_info = (USB_US_TYPE_STOR<<24) } | |
1da177e4 LT |
137 | |
138 | static struct usb_device_id storage_usb_ids [] = { | |
139 | ||
140 | # include "unusual_devs.h" | |
141 | #undef UNUSUAL_DEV | |
a00828e9 | 142 | #undef USUAL_DEV |
1da177e4 LT |
143 | /* Terminating entry */ |
144 | { } | |
145 | }; | |
146 | ||
147 | MODULE_DEVICE_TABLE (usb, storage_usb_ids); | |
a00828e9 | 148 | #endif /* CONFIG_USB_LIBUSUAL */ |
1da177e4 LT |
149 | |
150 | /* This is the list of devices we recognize, along with their flag data */ | |
151 | ||
152 | /* The vendor name should be kept at eight characters or less, and | |
153 | * the product name should be kept at 16 characters or less. If a device | |
154 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names | |
155 | * normally generated by a device thorugh the INQUIRY response will be | |
156 | * taken from this list, and this is the reason for the above size | |
157 | * restriction. However, if the flag is not present, then you | |
158 | * are free to use as many characters as you like. | |
159 | */ | |
160 | ||
1da177e4 LT |
161 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
162 | vendor_name, product_name, use_protocol, use_transport, \ | |
163 | init_function, Flags) \ | |
164 | { \ | |
165 | .vendorName = vendor_name, \ | |
166 | .productName = product_name, \ | |
167 | .useProtocol = use_protocol, \ | |
168 | .useTransport = use_transport, \ | |
169 | .initFunction = init_function, \ | |
a00828e9 PZ |
170 | } |
171 | ||
172 | #define USUAL_DEV(use_protocol, use_transport, use_type) \ | |
173 | { \ | |
174 | .useProtocol = use_protocol, \ | |
175 | .useTransport = use_transport, \ | |
1da177e4 LT |
176 | } |
177 | ||
178 | static struct us_unusual_dev us_unusual_dev_list[] = { | |
179 | # include "unusual_devs.h" | |
180 | # undef UNUSUAL_DEV | |
a00828e9 | 181 | # undef USUAL_DEV |
1da177e4 LT |
182 | |
183 | /* Terminating entry */ | |
184 | { NULL } | |
185 | }; | |
186 | ||
ce2596df AS |
187 | |
188 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ | |
189 | ||
190 | static int storage_suspend(struct usb_interface *iface, pm_message_t message) | |
191 | { | |
192 | struct us_data *us = usb_get_intfdata(iface); | |
193 | ||
194 | /* Wait until no command is running */ | |
4186ecf8 | 195 | mutex_lock(&us->dev_mutex); |
ce2596df AS |
196 | |
197 | US_DEBUGP("%s\n", __FUNCTION__); | |
7931e1c6 MD |
198 | if (us->suspend_resume_hook) |
199 | (us->suspend_resume_hook)(us, US_SUSPEND); | |
ce2596df AS |
200 | |
201 | /* When runtime PM is working, we'll set a flag to indicate | |
202 | * whether we should autoresume when a SCSI request arrives. */ | |
203 | ||
4186ecf8 | 204 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
205 | return 0; |
206 | } | |
207 | ||
208 | static int storage_resume(struct usb_interface *iface) | |
209 | { | |
210 | struct us_data *us = usb_get_intfdata(iface); | |
211 | ||
4186ecf8 | 212 | mutex_lock(&us->dev_mutex); |
ce2596df AS |
213 | |
214 | US_DEBUGP("%s\n", __FUNCTION__); | |
7931e1c6 MD |
215 | if (us->suspend_resume_hook) |
216 | (us->suspend_resume_hook)(us, US_RESUME); | |
ce2596df | 217 | |
4186ecf8 | 218 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
219 | return 0; |
220 | } | |
221 | ||
222 | #endif /* CONFIG_PM */ | |
1da177e4 | 223 | |
47104b0d AS |
224 | /* |
225 | * The next two routines get called just before and just after | |
226 | * a USB port reset, whether from this driver or a different one. | |
227 | */ | |
228 | ||
229 | static void storage_pre_reset(struct usb_interface *iface) | |
230 | { | |
231 | struct us_data *us = usb_get_intfdata(iface); | |
232 | ||
233 | US_DEBUGP("%s\n", __FUNCTION__); | |
234 | ||
235 | /* Make sure no command runs during the reset */ | |
236 | mutex_lock(&us->dev_mutex); | |
237 | } | |
238 | ||
0458d5b4 | 239 | static void storage_post_reset(struct usb_interface *iface, int reset_resume) |
47104b0d AS |
240 | { |
241 | struct us_data *us = usb_get_intfdata(iface); | |
242 | ||
243 | US_DEBUGP("%s\n", __FUNCTION__); | |
244 | ||
245 | /* Report the reset to the SCSI core */ | |
246 | scsi_lock(us_to_host(us)); | |
247 | usb_stor_report_bus_reset(us); | |
248 | scsi_unlock(us_to_host(us)); | |
249 | ||
250 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
251 | * the device */ | |
0458d5b4 AS |
252 | |
253 | /* If this is a reset-resume then the pre_reset routine wasn't | |
254 | * called, so we don't need to unlock the mutex. */ | |
255 | if (!reset_resume) | |
256 | mutex_unlock(&us->dev_mutex); | |
47104b0d AS |
257 | } |
258 | ||
1da177e4 LT |
259 | /* |
260 | * fill_inquiry_response takes an unsigned char array (which must | |
261 | * be at least 36 characters) and populates the vendor name, | |
262 | * product name, and revision fields. Then the array is copied | |
263 | * into the SCSI command's response buffer (oddly enough | |
264 | * called request_buffer). data_len contains the length of the | |
265 | * data array, which again must be at least 36. | |
266 | */ | |
267 | ||
268 | void fill_inquiry_response(struct us_data *us, unsigned char *data, | |
269 | unsigned int data_len) | |
270 | { | |
271 | if (data_len<36) // You lose. | |
272 | return; | |
273 | ||
274 | if(data[0]&0x20) { /* USB device currently not connected. Return | |
275 | peripheral qualifier 001b ("...however, the | |
276 | physical device is not currently connected | |
277 | to this logical unit") and leave vendor and | |
278 | product identification empty. ("If the target | |
279 | does store some of the INQUIRY data on the | |
280 | device, it may return zeros or ASCII spaces | |
281 | (20h) in those fields until the data is | |
282 | available from the device."). */ | |
283 | memset(data+8,0,28); | |
284 | } else { | |
285 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); | |
286 | memcpy(data+8, us->unusual_dev->vendorName, | |
287 | strlen(us->unusual_dev->vendorName) > 8 ? 8 : | |
288 | strlen(us->unusual_dev->vendorName)); | |
289 | memcpy(data+16, us->unusual_dev->productName, | |
290 | strlen(us->unusual_dev->productName) > 16 ? 16 : | |
291 | strlen(us->unusual_dev->productName)); | |
292 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); | |
293 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); | |
294 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); | |
295 | data[35] = 0x30 + ((bcdDevice) & 0x0F); | |
296 | } | |
297 | ||
298 | usb_stor_set_xfer_buf(data, data_len, us->srb); | |
299 | } | |
300 | ||
301 | static int usb_stor_control_thread(void * __us) | |
302 | { | |
303 | struct us_data *us = (struct us_data *)__us; | |
304 | struct Scsi_Host *host = us_to_host(us); | |
305 | ||
1da177e4 | 306 | current->flags |= PF_NOFREEZE; |
1da177e4 LT |
307 | |
308 | for(;;) { | |
309 | US_DEBUGP("*** thread sleeping.\n"); | |
310 | if(down_interruptible(&us->sema)) | |
311 | break; | |
312 | ||
313 | US_DEBUGP("*** thread awakened.\n"); | |
314 | ||
315 | /* lock the device pointers */ | |
4186ecf8 | 316 | mutex_lock(&(us->dev_mutex)); |
1da177e4 LT |
317 | |
318 | /* if the device has disconnected, we are free to exit */ | |
319 | if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { | |
320 | US_DEBUGP("-- exiting\n"); | |
4186ecf8 | 321 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
322 | break; |
323 | } | |
324 | ||
325 | /* lock access to the state */ | |
326 | scsi_lock(host); | |
327 | ||
328 | /* has the command timed out *already* ? */ | |
329 | if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) { | |
330 | us->srb->result = DID_ABORT << 16; | |
331 | goto SkipForAbort; | |
332 | } | |
333 | ||
334 | scsi_unlock(host); | |
335 | ||
336 | /* reject the command if the direction indicator | |
337 | * is UNKNOWN | |
338 | */ | |
339 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { | |
340 | US_DEBUGP("UNKNOWN data direction\n"); | |
341 | us->srb->result = DID_ERROR << 16; | |
342 | } | |
343 | ||
344 | /* reject if target != 0 or if LUN is higher than | |
345 | * the maximum known LUN | |
346 | */ | |
347 | else if (us->srb->device->id && | |
348 | !(us->flags & US_FL_SCM_MULT_TARG)) { | |
349 | US_DEBUGP("Bad target number (%d:%d)\n", | |
350 | us->srb->device->id, us->srb->device->lun); | |
351 | us->srb->result = DID_BAD_TARGET << 16; | |
352 | } | |
353 | ||
354 | else if (us->srb->device->lun > us->max_lun) { | |
355 | US_DEBUGP("Bad LUN (%d:%d)\n", | |
356 | us->srb->device->id, us->srb->device->lun); | |
357 | us->srb->result = DID_BAD_TARGET << 16; | |
358 | } | |
359 | ||
360 | /* Handle those devices which need us to fake | |
361 | * their inquiry data */ | |
362 | else if ((us->srb->cmnd[0] == INQUIRY) && | |
363 | (us->flags & US_FL_FIX_INQUIRY)) { | |
364 | unsigned char data_ptr[36] = { | |
365 | 0x00, 0x80, 0x02, 0x02, | |
366 | 0x1F, 0x00, 0x00, 0x00}; | |
367 | ||
368 | US_DEBUGP("Faking INQUIRY command\n"); | |
369 | fill_inquiry_response(us, data_ptr, 36); | |
370 | us->srb->result = SAM_STAT_GOOD; | |
371 | } | |
372 | ||
373 | /* we've got a command, let's do it! */ | |
374 | else { | |
375 | US_DEBUG(usb_stor_show_command(us->srb)); | |
376 | us->proto_handler(us->srb, us); | |
377 | } | |
378 | ||
379 | /* lock access to the state */ | |
380 | scsi_lock(host); | |
381 | ||
eecd11ed AS |
382 | /* did the command already complete because of a disconnect? */ |
383 | if (!us->srb) | |
384 | ; /* nothing to do */ | |
385 | ||
1da177e4 | 386 | /* indicate that the command is done */ |
eecd11ed | 387 | else if (us->srb->result != DID_ABORT << 16) { |
1da177e4 LT |
388 | US_DEBUGP("scsi cmd done, result=0x%x\n", |
389 | us->srb->result); | |
390 | us->srb->scsi_done(us->srb); | |
391 | } else { | |
392 | SkipForAbort: | |
393 | US_DEBUGP("scsi command aborted\n"); | |
394 | } | |
395 | ||
396 | /* If an abort request was received we need to signal that | |
397 | * the abort has finished. The proper test for this is | |
398 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because | |
226173ed MD |
399 | * the timeout might have occurred after the command had |
400 | * already completed with a different result code. */ | |
401 | if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) { | |
1da177e4 LT |
402 | complete(&(us->notify)); |
403 | ||
226173ed MD |
404 | /* Allow USB transfers to resume */ |
405 | clear_bit(US_FLIDX_ABORTING, &us->flags); | |
406 | clear_bit(US_FLIDX_TIMED_OUT, &us->flags); | |
407 | } | |
408 | ||
1da177e4 LT |
409 | /* finished working on this command */ |
410 | us->srb = NULL; | |
411 | scsi_unlock(host); | |
412 | ||
413 | /* unlock the device pointers */ | |
4186ecf8 | 414 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
415 | } /* for (;;) */ |
416 | ||
417 | scsi_host_put(host); | |
418 | ||
419 | /* notify the exit routine that we're actually exiting now | |
420 | * | |
421 | * complete()/wait_for_completion() is similar to up()/down(), | |
422 | * except that complete() is safe in the case where the structure | |
423 | * is getting deleted in a parallel mode of execution (i.e. just | |
424 | * after the down() -- that's necessary for the thread-shutdown | |
425 | * case. | |
426 | * | |
427 | * complete_and_exit() goes even further than this -- it is safe in | |
428 | * the case that the thread of the caller is going away (not just | |
429 | * the structure) -- this is necessary for the module-remove case. | |
430 | * This is important in preemption kernels, which transfer the flow | |
431 | * of execution immediately upon a complete(). | |
432 | */ | |
433 | complete_and_exit(&threads_gone, 0); | |
434 | } | |
435 | ||
436 | /*********************************************************************** | |
437 | * Device probing and disconnecting | |
438 | ***********************************************************************/ | |
439 | ||
440 | /* Associate our private data with the USB device */ | |
441 | static int associate_dev(struct us_data *us, struct usb_interface *intf) | |
442 | { | |
443 | US_DEBUGP("-- %s\n", __FUNCTION__); | |
444 | ||
445 | /* Fill in the device-related fields */ | |
446 | us->pusb_dev = interface_to_usbdev(intf); | |
447 | us->pusb_intf = intf; | |
448 | us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
449 | US_DEBUGP("Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", | |
450 | le16_to_cpu(us->pusb_dev->descriptor.idVendor), | |
451 | le16_to_cpu(us->pusb_dev->descriptor.idProduct), | |
452 | le16_to_cpu(us->pusb_dev->descriptor.bcdDevice)); | |
453 | US_DEBUGP("Interface Subclass: 0x%02x, Protocol: 0x%02x\n", | |
454 | intf->cur_altsetting->desc.bInterfaceSubClass, | |
455 | intf->cur_altsetting->desc.bInterfaceProtocol); | |
456 | ||
457 | /* Store our private data in the interface */ | |
458 | usb_set_intfdata(intf, us); | |
459 | ||
460 | /* Allocate the device-related DMA-mapped buffers */ | |
461 | us->cr = usb_buffer_alloc(us->pusb_dev, sizeof(*us->cr), | |
462 | GFP_KERNEL, &us->cr_dma); | |
463 | if (!us->cr) { | |
464 | US_DEBUGP("usb_ctrlrequest allocation failed\n"); | |
465 | return -ENOMEM; | |
466 | } | |
467 | ||
468 | us->iobuf = usb_buffer_alloc(us->pusb_dev, US_IOBUF_SIZE, | |
469 | GFP_KERNEL, &us->iobuf_dma); | |
470 | if (!us->iobuf) { | |
471 | US_DEBUGP("I/O buffer allocation failed\n"); | |
472 | return -ENOMEM; | |
473 | } | |
bbafa466 AS |
474 | |
475 | us->sensebuf = kmalloc(US_SENSE_SIZE, GFP_KERNEL); | |
476 | if (!us->sensebuf) { | |
477 | US_DEBUGP("Sense buffer allocation failed\n"); | |
478 | return -ENOMEM; | |
479 | } | |
1da177e4 LT |
480 | return 0; |
481 | } | |
482 | ||
a00828e9 PZ |
483 | /* Find an unusual_dev descriptor (always succeeds in the current code) */ |
484 | static struct us_unusual_dev *find_unusual(const struct usb_device_id *id) | |
485 | { | |
486 | const int id_index = id - storage_usb_ids; | |
487 | return &us_unusual_dev_list[id_index]; | |
488 | } | |
489 | ||
1da177e4 | 490 | /* Get the unusual_devs entries and the string descriptors */ |
3c332422 | 491 | static int get_device_info(struct us_data *us, const struct usb_device_id *id) |
1da177e4 LT |
492 | { |
493 | struct usb_device *dev = us->pusb_dev; | |
494 | struct usb_interface_descriptor *idesc = | |
495 | &us->pusb_intf->cur_altsetting->desc; | |
a00828e9 | 496 | struct us_unusual_dev *unusual_dev = find_unusual(id); |
1da177e4 LT |
497 | |
498 | /* Store the entries */ | |
499 | us->unusual_dev = unusual_dev; | |
500 | us->subclass = (unusual_dev->useProtocol == US_SC_DEVICE) ? | |
501 | idesc->bInterfaceSubClass : | |
502 | unusual_dev->useProtocol; | |
503 | us->protocol = (unusual_dev->useTransport == US_PR_DEVICE) ? | |
504 | idesc->bInterfaceProtocol : | |
505 | unusual_dev->useTransport; | |
a00828e9 | 506 | us->flags = USB_US_ORIG_FLAGS(id->driver_info); |
1da177e4 | 507 | |
3c332422 DD |
508 | if (us->flags & US_FL_IGNORE_DEVICE) { |
509 | printk(KERN_INFO USB_STORAGE "device ignored\n"); | |
510 | return -ENODEV; | |
511 | } | |
512 | ||
1da177e4 LT |
513 | /* |
514 | * This flag is only needed when we're in high-speed, so let's | |
515 | * disable it if we're in full-speed | |
516 | */ | |
517 | if (dev->speed != USB_SPEED_HIGH) | |
518 | us->flags &= ~US_FL_GO_SLOW; | |
519 | ||
520 | /* Log a message if a non-generic unusual_dev entry contains an | |
521 | * unnecessary subclass or protocol override. This may stimulate | |
522 | * reports from users that will help us remove unneeded entries | |
523 | * from the unusual_devs.h table. | |
524 | */ | |
525 | if (id->idVendor || id->idProduct) { | |
4c4c9432 | 526 | static const char *msgs[3] = { |
1da177e4 LT |
527 | "an unneeded SubClass entry", |
528 | "an unneeded Protocol entry", | |
529 | "unneeded SubClass and Protocol entries"}; | |
530 | struct usb_device_descriptor *ddesc = &dev->descriptor; | |
531 | int msg = -1; | |
532 | ||
533 | if (unusual_dev->useProtocol != US_SC_DEVICE && | |
534 | us->subclass == idesc->bInterfaceSubClass) | |
535 | msg += 1; | |
536 | if (unusual_dev->useTransport != US_PR_DEVICE && | |
537 | us->protocol == idesc->bInterfaceProtocol) | |
538 | msg += 2; | |
a00828e9 | 539 | if (msg >= 0 && !(us->flags & US_FL_NEED_OVERRIDE)) |
1da177e4 LT |
540 | printk(KERN_NOTICE USB_STORAGE "This device " |
541 | "(%04x,%04x,%04x S %02x P %02x)" | |
5650b4dd PD |
542 | " has %s in unusual_devs.h (kernel" |
543 | " %s)\n" | |
1da177e4 LT |
544 | " Please send a copy of this message to " |
545 | "<linux-usb-devel@lists.sourceforge.net>\n", | |
546 | le16_to_cpu(ddesc->idVendor), | |
547 | le16_to_cpu(ddesc->idProduct), | |
548 | le16_to_cpu(ddesc->bcdDevice), | |
549 | idesc->bInterfaceSubClass, | |
550 | idesc->bInterfaceProtocol, | |
5650b4dd | 551 | msgs[msg], |
00f8b0c1 | 552 | utsname()->release); |
1da177e4 | 553 | } |
3c332422 DD |
554 | |
555 | return 0; | |
1da177e4 LT |
556 | } |
557 | ||
558 | /* Get the transport settings */ | |
559 | static int get_transport(struct us_data *us) | |
560 | { | |
561 | switch (us->protocol) { | |
562 | case US_PR_CB: | |
563 | us->transport_name = "Control/Bulk"; | |
564 | us->transport = usb_stor_CB_transport; | |
565 | us->transport_reset = usb_stor_CB_reset; | |
566 | us->max_lun = 7; | |
567 | break; | |
568 | ||
569 | case US_PR_CBI: | |
570 | us->transport_name = "Control/Bulk/Interrupt"; | |
571 | us->transport = usb_stor_CBI_transport; | |
572 | us->transport_reset = usb_stor_CB_reset; | |
573 | us->max_lun = 7; | |
574 | break; | |
575 | ||
576 | case US_PR_BULK: | |
577 | us->transport_name = "Bulk"; | |
578 | us->transport = usb_stor_Bulk_transport; | |
579 | us->transport_reset = usb_stor_Bulk_reset; | |
580 | break; | |
581 | ||
582 | #ifdef CONFIG_USB_STORAGE_USBAT | |
b7b1e655 DD |
583 | case US_PR_USBAT: |
584 | us->transport_name = "Shuttle USBAT"; | |
1da177e4 LT |
585 | us->transport = usbat_transport; |
586 | us->transport_reset = usb_stor_CB_reset; | |
587 | us->max_lun = 1; | |
588 | break; | |
589 | #endif | |
590 | ||
591 | #ifdef CONFIG_USB_STORAGE_SDDR09 | |
592 | case US_PR_EUSB_SDDR09: | |
593 | us->transport_name = "EUSB/SDDR09"; | |
594 | us->transport = sddr09_transport; | |
595 | us->transport_reset = usb_stor_CB_reset; | |
596 | us->max_lun = 0; | |
597 | break; | |
598 | #endif | |
599 | ||
600 | #ifdef CONFIG_USB_STORAGE_SDDR55 | |
601 | case US_PR_SDDR55: | |
602 | us->transport_name = "SDDR55"; | |
603 | us->transport = sddr55_transport; | |
604 | us->transport_reset = sddr55_reset; | |
605 | us->max_lun = 0; | |
606 | break; | |
607 | #endif | |
608 | ||
609 | #ifdef CONFIG_USB_STORAGE_DPCM | |
610 | case US_PR_DPCM_USB: | |
611 | us->transport_name = "Control/Bulk-EUSB/SDDR09"; | |
612 | us->transport = dpcm_transport; | |
613 | us->transport_reset = usb_stor_CB_reset; | |
614 | us->max_lun = 1; | |
615 | break; | |
616 | #endif | |
617 | ||
618 | #ifdef CONFIG_USB_STORAGE_FREECOM | |
619 | case US_PR_FREECOM: | |
620 | us->transport_name = "Freecom"; | |
621 | us->transport = freecom_transport; | |
622 | us->transport_reset = usb_stor_freecom_reset; | |
623 | us->max_lun = 0; | |
624 | break; | |
625 | #endif | |
626 | ||
627 | #ifdef CONFIG_USB_STORAGE_DATAFAB | |
628 | case US_PR_DATAFAB: | |
629 | us->transport_name = "Datafab Bulk-Only"; | |
630 | us->transport = datafab_transport; | |
631 | us->transport_reset = usb_stor_Bulk_reset; | |
632 | us->max_lun = 1; | |
633 | break; | |
634 | #endif | |
635 | ||
636 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT | |
637 | case US_PR_JUMPSHOT: | |
638 | us->transport_name = "Lexar Jumpshot Control/Bulk"; | |
639 | us->transport = jumpshot_transport; | |
640 | us->transport_reset = usb_stor_Bulk_reset; | |
641 | us->max_lun = 1; | |
642 | break; | |
643 | #endif | |
644 | ||
b383539e DD |
645 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
646 | case US_PR_ALAUDA: | |
647 | us->transport_name = "Alauda Control/Bulk"; | |
648 | us->transport = alauda_transport; | |
649 | us->transport_reset = usb_stor_Bulk_reset; | |
650 | us->max_lun = 1; | |
651 | break; | |
652 | #endif | |
653 | ||
dfe0d3ba MD |
654 | #ifdef CONFIG_USB_STORAGE_KARMA |
655 | case US_PR_KARMA: | |
656 | us->transport_name = "Rio Karma/Bulk"; | |
657 | us->transport = rio_karma_transport; | |
658 | us->transport_reset = usb_stor_Bulk_reset; | |
659 | break; | |
660 | #endif | |
661 | ||
1da177e4 LT |
662 | default: |
663 | return -EIO; | |
664 | } | |
665 | US_DEBUGP("Transport: %s\n", us->transport_name); | |
666 | ||
667 | /* fix for single-lun devices */ | |
668 | if (us->flags & US_FL_SINGLE_LUN) | |
669 | us->max_lun = 0; | |
670 | return 0; | |
671 | } | |
672 | ||
673 | /* Get the protocol settings */ | |
674 | static int get_protocol(struct us_data *us) | |
675 | { | |
676 | switch (us->subclass) { | |
677 | case US_SC_RBC: | |
678 | us->protocol_name = "Reduced Block Commands (RBC)"; | |
679 | us->proto_handler = usb_stor_transparent_scsi_command; | |
680 | break; | |
681 | ||
682 | case US_SC_8020: | |
683 | us->protocol_name = "8020i"; | |
684 | us->proto_handler = usb_stor_ATAPI_command; | |
685 | us->max_lun = 0; | |
686 | break; | |
687 | ||
688 | case US_SC_QIC: | |
689 | us->protocol_name = "QIC-157"; | |
690 | us->proto_handler = usb_stor_qic157_command; | |
691 | us->max_lun = 0; | |
692 | break; | |
693 | ||
694 | case US_SC_8070: | |
695 | us->protocol_name = "8070i"; | |
696 | us->proto_handler = usb_stor_ATAPI_command; | |
697 | us->max_lun = 0; | |
698 | break; | |
699 | ||
700 | case US_SC_SCSI: | |
701 | us->protocol_name = "Transparent SCSI"; | |
702 | us->proto_handler = usb_stor_transparent_scsi_command; | |
703 | break; | |
704 | ||
705 | case US_SC_UFI: | |
706 | us->protocol_name = "Uniform Floppy Interface (UFI)"; | |
707 | us->proto_handler = usb_stor_ufi_command; | |
708 | break; | |
709 | ||
710 | #ifdef CONFIG_USB_STORAGE_ISD200 | |
711 | case US_SC_ISD200: | |
712 | us->protocol_name = "ISD200 ATA/ATAPI"; | |
713 | us->proto_handler = isd200_ata_command; | |
714 | break; | |
715 | #endif | |
716 | ||
717 | default: | |
718 | return -EIO; | |
719 | } | |
720 | US_DEBUGP("Protocol: %s\n", us->protocol_name); | |
721 | return 0; | |
722 | } | |
723 | ||
724 | /* Get the pipe settings */ | |
725 | static int get_pipes(struct us_data *us) | |
726 | { | |
727 | struct usb_host_interface *altsetting = | |
728 | us->pusb_intf->cur_altsetting; | |
729 | int i; | |
730 | struct usb_endpoint_descriptor *ep; | |
731 | struct usb_endpoint_descriptor *ep_in = NULL; | |
732 | struct usb_endpoint_descriptor *ep_out = NULL; | |
733 | struct usb_endpoint_descriptor *ep_int = NULL; | |
734 | ||
735 | /* | |
1096f780 | 736 | * Find the first endpoint of each type we need. |
1da177e4 | 737 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
1096f780 | 738 | * An optional interrupt-in is OK (necessary for CBI protocol). |
1da177e4 LT |
739 | * We will ignore any others. |
740 | */ | |
741 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { | |
742 | ep = &altsetting->endpoint[i].desc; | |
743 | ||
04720747 | 744 | if (usb_endpoint_xfer_bulk(ep)) { |
1096f780 AS |
745 | if (usb_endpoint_dir_in(ep)) { |
746 | if (!ep_in) | |
747 | ep_in = ep; | |
748 | } else { | |
749 | if (!ep_out) | |
750 | ep_out = ep; | |
751 | } | |
1da177e4 LT |
752 | } |
753 | ||
1096f780 AS |
754 | else if (usb_endpoint_is_int_in(ep)) { |
755 | if (!ep_int) | |
756 | ep_int = ep; | |
1da177e4 LT |
757 | } |
758 | } | |
759 | ||
760 | if (!ep_in || !ep_out || (us->protocol == US_PR_CBI && !ep_int)) { | |
761 | US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n"); | |
762 | return -EIO; | |
763 | } | |
764 | ||
765 | /* Calculate and store the pipe values */ | |
766 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); | |
767 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); | |
768 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, | |
769 | ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
770 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, | |
771 | ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
772 | if (ep_int) { | |
773 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, | |
774 | ep_int->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
775 | us->ep_bInterval = ep_int->bInterval; | |
776 | } | |
777 | return 0; | |
778 | } | |
779 | ||
780 | /* Initialize all the dynamic resources we need */ | |
781 | static int usb_stor_acquire_resources(struct us_data *us) | |
782 | { | |
783 | int p; | |
3f13e66e | 784 | struct task_struct *th; |
1da177e4 LT |
785 | |
786 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); | |
787 | if (!us->current_urb) { | |
788 | US_DEBUGP("URB allocation failed\n"); | |
789 | return -ENOMEM; | |
790 | } | |
791 | ||
1da177e4 LT |
792 | /* Just before we start our control thread, initialize |
793 | * the device if it needs initialization */ | |
b876aef7 AS |
794 | if (us->unusual_dev->initFunction) { |
795 | p = us->unusual_dev->initFunction(us); | |
796 | if (p) | |
797 | return p; | |
798 | } | |
1da177e4 LT |
799 | |
800 | /* Start up our control thread */ | |
3f13e66e AS |
801 | th = kthread_create(usb_stor_control_thread, us, "usb-storage"); |
802 | if (IS_ERR(th)) { | |
1da177e4 LT |
803 | printk(KERN_WARNING USB_STORAGE |
804 | "Unable to start control thread\n"); | |
3f13e66e | 805 | return PTR_ERR(th); |
1da177e4 | 806 | } |
1da177e4 | 807 | |
3f13e66e AS |
808 | /* Take a reference to the host for the control thread and |
809 | * count it among all the threads we have launched. Then | |
810 | * start it up. */ | |
811 | scsi_host_get(us_to_host(us)); | |
812 | atomic_inc(&total_threads); | |
813 | wake_up_process(th); | |
1da177e4 LT |
814 | |
815 | return 0; | |
816 | } | |
817 | ||
818 | /* Release all our dynamic resources */ | |
819 | static void usb_stor_release_resources(struct us_data *us) | |
820 | { | |
821 | US_DEBUGP("-- %s\n", __FUNCTION__); | |
822 | ||
823 | /* Tell the control thread to exit. The SCSI host must | |
824 | * already have been removed so it won't try to queue | |
825 | * any more commands. | |
826 | */ | |
827 | US_DEBUGP("-- sending exit command to thread\n"); | |
77f46328 | 828 | set_bit(US_FLIDX_DISCONNECTING, &us->flags); |
1da177e4 LT |
829 | up(&us->sema); |
830 | ||
831 | /* Call the destructor routine, if it exists */ | |
832 | if (us->extra_destructor) { | |
833 | US_DEBUGP("-- calling extra_destructor()\n"); | |
834 | us->extra_destructor(us->extra); | |
835 | } | |
836 | ||
837 | /* Free the extra data and the URB */ | |
838 | kfree(us->extra); | |
839 | usb_free_urb(us->current_urb); | |
840 | } | |
841 | ||
842 | /* Dissociate from the USB device */ | |
843 | static void dissociate_dev(struct us_data *us) | |
844 | { | |
845 | US_DEBUGP("-- %s\n", __FUNCTION__); | |
846 | ||
bbafa466 AS |
847 | kfree(us->sensebuf); |
848 | ||
1da177e4 LT |
849 | /* Free the device-related DMA-mapped buffers */ |
850 | if (us->cr) | |
851 | usb_buffer_free(us->pusb_dev, sizeof(*us->cr), us->cr, | |
852 | us->cr_dma); | |
853 | if (us->iobuf) | |
854 | usb_buffer_free(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, | |
855 | us->iobuf_dma); | |
856 | ||
857 | /* Remove our private data from the interface */ | |
858 | usb_set_intfdata(us->pusb_intf, NULL); | |
859 | } | |
860 | ||
77f46328 MD |
861 | /* First stage of disconnect processing: stop all commands and remove |
862 | * the host */ | |
863 | static void quiesce_and_remove_host(struct us_data *us) | |
864 | { | |
eecd11ed AS |
865 | struct Scsi_Host *host = us_to_host(us); |
866 | ||
77f46328 MD |
867 | /* Prevent new USB transfers, stop the current command, and |
868 | * interrupt a SCSI-scan or device-reset delay */ | |
eecd11ed | 869 | scsi_lock(host); |
77f46328 | 870 | set_bit(US_FLIDX_DISCONNECTING, &us->flags); |
eecd11ed | 871 | scsi_unlock(host); |
77f46328 MD |
872 | usb_stor_stop_transport(us); |
873 | wake_up(&us->delay_wait); | |
874 | ||
875 | /* It doesn't matter if the SCSI-scanning thread is still running. | |
876 | * The thread will exit when it sees the DISCONNECTING flag. */ | |
877 | ||
26186ba7 MD |
878 | /* queuecommand won't accept any new commands and the control |
879 | * thread won't execute a previously-queued command. If there | |
880 | * is such a command pending, complete it with an error. */ | |
eecd11ed | 881 | mutex_lock(&us->dev_mutex); |
26186ba7 MD |
882 | if (us->srb) { |
883 | us->srb->result = DID_NO_CONNECT << 16; | |
eecd11ed | 884 | scsi_lock(host); |
26186ba7 MD |
885 | us->srb->scsi_done(us->srb); |
886 | us->srb = NULL; | |
eecd11ed | 887 | scsi_unlock(host); |
26186ba7 | 888 | } |
eecd11ed | 889 | mutex_unlock(&us->dev_mutex); |
26186ba7 MD |
890 | |
891 | /* Now we own no commands so it's safe to remove the SCSI host */ | |
eecd11ed | 892 | scsi_remove_host(host); |
77f46328 MD |
893 | } |
894 | ||
895 | /* Second stage of disconnect processing: deallocate all resources */ | |
896 | static void release_everything(struct us_data *us) | |
897 | { | |
898 | usb_stor_release_resources(us); | |
899 | dissociate_dev(us); | |
900 | ||
901 | /* Drop our reference to the host; the SCSI core will free it | |
902 | * (and "us" along with it) when the refcount becomes 0. */ | |
903 | scsi_host_put(us_to_host(us)); | |
904 | } | |
905 | ||
1da177e4 LT |
906 | /* Thread to carry out delayed SCSI-device scanning */ |
907 | static int usb_stor_scan_thread(void * __us) | |
908 | { | |
909 | struct us_data *us = (struct us_data *)__us; | |
910 | ||
1da177e4 LT |
911 | printk(KERN_DEBUG |
912 | "usb-storage: device found at %d\n", us->pusb_dev->devnum); | |
913 | ||
914 | /* Wait for the timeout to expire or for a disconnect */ | |
915 | if (delay_use > 0) { | |
916 | printk(KERN_DEBUG "usb-storage: waiting for device " | |
917 | "to settle before scanning\n"); | |
918 | retry: | |
919 | wait_event_interruptible_timeout(us->delay_wait, | |
920 | test_bit(US_FLIDX_DISCONNECTING, &us->flags), | |
921 | delay_use * HZ); | |
3e1d1d28 | 922 | if (try_to_freeze()) |
1da177e4 | 923 | goto retry; |
1da177e4 LT |
924 | } |
925 | ||
926 | /* If the device is still connected, perform the scanning */ | |
927 | if (!test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { | |
b876aef7 AS |
928 | |
929 | /* For bulk-only devices, determine the max LUN value */ | |
930 | if (us->protocol == US_PR_BULK && | |
931 | !(us->flags & US_FL_SINGLE_LUN)) { | |
4186ecf8 | 932 | mutex_lock(&us->dev_mutex); |
b876aef7 | 933 | us->max_lun = usb_stor_Bulk_max_lun(us); |
4186ecf8 | 934 | mutex_unlock(&us->dev_mutex); |
b876aef7 | 935 | } |
1da177e4 LT |
936 | scsi_scan_host(us_to_host(us)); |
937 | printk(KERN_DEBUG "usb-storage: device scan complete\n"); | |
938 | ||
939 | /* Should we unbind if no devices were detected? */ | |
940 | } | |
941 | ||
942 | scsi_host_put(us_to_host(us)); | |
943 | complete_and_exit(&threads_gone, 0); | |
944 | } | |
945 | ||
946 | ||
947 | /* Probe to see if we can drive a newly-connected USB device */ | |
948 | static int storage_probe(struct usb_interface *intf, | |
949 | const struct usb_device_id *id) | |
950 | { | |
951 | struct Scsi_Host *host; | |
952 | struct us_data *us; | |
1da177e4 | 953 | int result; |
3f13e66e | 954 | struct task_struct *th; |
1da177e4 | 955 | |
a00828e9 PZ |
956 | if (usb_usual_check_type(id, USB_US_TYPE_STOR)) |
957 | return -ENXIO; | |
958 | ||
1da177e4 LT |
959 | US_DEBUGP("USB Mass Storage device detected\n"); |
960 | ||
961 | /* | |
962 | * Ask the SCSI layer to allocate a host structure, with extra | |
963 | * space at the end for our private us_data structure. | |
964 | */ | |
965 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); | |
966 | if (!host) { | |
967 | printk(KERN_WARNING USB_STORAGE | |
968 | "Unable to allocate the scsi host\n"); | |
969 | return -ENOMEM; | |
970 | } | |
971 | ||
972 | us = host_to_us(host); | |
973 | memset(us, 0, sizeof(struct us_data)); | |
4186ecf8 | 974 | mutex_init(&(us->dev_mutex)); |
1da177e4 LT |
975 | init_MUTEX_LOCKED(&(us->sema)); |
976 | init_completion(&(us->notify)); | |
977 | init_waitqueue_head(&us->delay_wait); | |
978 | ||
979 | /* Associate the us_data structure with the USB device */ | |
980 | result = associate_dev(us, intf); | |
981 | if (result) | |
982 | goto BadDevice; | |
983 | ||
984 | /* | |
985 | * Get the unusual_devs entries and the descriptors | |
986 | * | |
987 | * id_index is calculated in the declaration to be the index number | |
988 | * of the match from the usb_device_id table, so we can find the | |
989 | * corresponding entry in the private table. | |
990 | */ | |
3c332422 DD |
991 | result = get_device_info(us, id); |
992 | if (result) | |
993 | goto BadDevice; | |
1da177e4 | 994 | |
1da177e4 LT |
995 | /* Get the transport, protocol, and pipe settings */ |
996 | result = get_transport(us); | |
997 | if (result) | |
998 | goto BadDevice; | |
999 | result = get_protocol(us); | |
1000 | if (result) | |
1001 | goto BadDevice; | |
1002 | result = get_pipes(us); | |
1003 | if (result) | |
1004 | goto BadDevice; | |
1005 | ||
1006 | /* Acquire all the other resources and add the host */ | |
1007 | result = usb_stor_acquire_resources(us); | |
1008 | if (result) | |
1009 | goto BadDevice; | |
1010 | result = scsi_add_host(host, &intf->dev); | |
1011 | if (result) { | |
1012 | printk(KERN_WARNING USB_STORAGE | |
1013 | "Unable to add the scsi host\n"); | |
1014 | goto BadDevice; | |
1015 | } | |
1016 | ||
1017 | /* Start up the thread for delayed SCSI-device scanning */ | |
3f13e66e AS |
1018 | th = kthread_create(usb_stor_scan_thread, us, "usb-stor-scan"); |
1019 | if (IS_ERR(th)) { | |
1da177e4 LT |
1020 | printk(KERN_WARNING USB_STORAGE |
1021 | "Unable to start the device-scanning thread\n"); | |
77f46328 | 1022 | quiesce_and_remove_host(us); |
3f13e66e | 1023 | result = PTR_ERR(th); |
1da177e4 LT |
1024 | goto BadDevice; |
1025 | } | |
1da177e4 | 1026 | |
3f13e66e AS |
1027 | /* Take a reference to the host for the scanning thread and |
1028 | * count it among all the threads we have launched. Then | |
1029 | * start it up. */ | |
1030 | scsi_host_get(us_to_host(us)); | |
1031 | atomic_inc(&total_threads); | |
1032 | wake_up_process(th); | |
1da177e4 LT |
1033 | |
1034 | return 0; | |
1035 | ||
1036 | /* We come here if there are any problems */ | |
1037 | BadDevice: | |
1038 | US_DEBUGP("storage_probe() failed\n"); | |
77f46328 | 1039 | release_everything(us); |
1da177e4 LT |
1040 | return result; |
1041 | } | |
1042 | ||
1043 | /* Handle a disconnect event from the USB core */ | |
1044 | static void storage_disconnect(struct usb_interface *intf) | |
1045 | { | |
1046 | struct us_data *us = usb_get_intfdata(intf); | |
1047 | ||
1048 | US_DEBUGP("storage_disconnect() called\n"); | |
77f46328 MD |
1049 | quiesce_and_remove_host(us); |
1050 | release_everything(us); | |
1da177e4 LT |
1051 | } |
1052 | ||
1053 | /*********************************************************************** | |
1054 | * Initialization and registration | |
1055 | ***********************************************************************/ | |
1056 | ||
ce2596df | 1057 | static struct usb_driver usb_storage_driver = { |
ce2596df AS |
1058 | .name = "usb-storage", |
1059 | .probe = storage_probe, | |
1060 | .disconnect = storage_disconnect, | |
1061 | #ifdef CONFIG_PM | |
1062 | .suspend = storage_suspend, | |
1063 | .resume = storage_resume, | |
1064 | #endif | |
47104b0d AS |
1065 | .pre_reset = storage_pre_reset, |
1066 | .post_reset = storage_post_reset, | |
ce2596df AS |
1067 | .id_table = storage_usb_ids, |
1068 | }; | |
1069 | ||
1da177e4 LT |
1070 | static int __init usb_stor_init(void) |
1071 | { | |
1072 | int retval; | |
1073 | printk(KERN_INFO "Initializing USB Mass Storage driver...\n"); | |
1074 | ||
1075 | /* register the driver, return usb_register return code if error */ | |
1076 | retval = usb_register(&usb_storage_driver); | |
a00828e9 | 1077 | if (retval == 0) { |
1da177e4 | 1078 | printk(KERN_INFO "USB Mass Storage support registered.\n"); |
a00828e9 PZ |
1079 | usb_usual_set_present(USB_US_TYPE_STOR); |
1080 | } | |
1da177e4 LT |
1081 | return retval; |
1082 | } | |
1083 | ||
1084 | static void __exit usb_stor_exit(void) | |
1085 | { | |
1086 | US_DEBUGP("usb_stor_exit() called\n"); | |
1087 | ||
1088 | /* Deregister the driver | |
1089 | * This will cause disconnect() to be called for each | |
1090 | * attached unit | |
1091 | */ | |
1092 | US_DEBUGP("-- calling usb_deregister()\n"); | |
1093 | usb_deregister(&usb_storage_driver) ; | |
1094 | ||
1095 | /* Don't return until all of our control and scanning threads | |
1096 | * have exited. Since each thread signals threads_gone as its | |
1097 | * last act, we have to call wait_for_completion the right number | |
1098 | * of times. | |
1099 | */ | |
1100 | while (atomic_read(&total_threads) > 0) { | |
1101 | wait_for_completion(&threads_gone); | |
1102 | atomic_dec(&total_threads); | |
1103 | } | |
a00828e9 PZ |
1104 | |
1105 | usb_usual_clear_present(USB_US_TYPE_STOR); | |
1da177e4 LT |
1106 | } |
1107 | ||
1108 | module_init(usb_stor_init); | |
1109 | module_exit(usb_stor_exit); |