Commit | Line | Data |
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1da177e4 | 1 | /* Driver for USB Mass Storage compliant devices |
1da177e4 LT |
2 | * |
3 | * Current development and maintenance by: | |
4 | * (c) 1999-2003 Matthew Dharm (mdharm-usb@one-eyed-alien.net) | |
5 | * | |
6 | * Developed with the assistance of: | |
7 | * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) | |
8 | * (c) 2003 Alan Stern (stern@rowland.harvard.edu) | |
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 | ||
1da177e4 LT |
48 | #include <linux/sched.h> |
49 | #include <linux/errno.h> | |
7dfb7103 | 50 | #include <linux/freezer.h> |
1da177e4 LT |
51 | #include <linux/module.h> |
52 | #include <linux/init.h> | |
53 | #include <linux/slab.h> | |
3f13e66e | 54 | #include <linux/kthread.h> |
4186ecf8 | 55 | #include <linux/mutex.h> |
00f8b0c1 | 56 | #include <linux/utsname.h> |
1da177e4 LT |
57 | |
58 | #include <scsi/scsi.h> | |
59 | #include <scsi/scsi_cmnd.h> | |
60 | #include <scsi/scsi_device.h> | |
61 | ||
62 | #include "usb.h" | |
63 | #include "scsiglue.h" | |
64 | #include "transport.h" | |
65 | #include "protocol.h" | |
66 | #include "debug.h" | |
67 | #include "initializers.h" | |
68 | ||
69 | #ifdef CONFIG_USB_STORAGE_USBAT | |
70 | #include "shuttle_usbat.h" | |
71 | #endif | |
72 | #ifdef CONFIG_USB_STORAGE_SDDR09 | |
73 | #include "sddr09.h" | |
74 | #endif | |
75 | #ifdef CONFIG_USB_STORAGE_SDDR55 | |
76 | #include "sddr55.h" | |
77 | #endif | |
1da177e4 LT |
78 | #ifdef CONFIG_USB_STORAGE_FREECOM |
79 | #include "freecom.h" | |
80 | #endif | |
81 | #ifdef CONFIG_USB_STORAGE_ISD200 | |
82 | #include "isd200.h" | |
83 | #endif | |
84 | #ifdef CONFIG_USB_STORAGE_DATAFAB | |
85 | #include "datafab.h" | |
86 | #endif | |
87 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT | |
88 | #include "jumpshot.h" | |
89 | #endif | |
34008dbf MD |
90 | #ifdef CONFIG_USB_STORAGE_ONETOUCH |
91 | #include "onetouch.h" | |
92 | #endif | |
e80b0fad MD |
93 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
94 | #include "alauda.h" | |
95 | #endif | |
dfe0d3ba MD |
96 | #ifdef CONFIG_USB_STORAGE_KARMA |
97 | #include "karma.h" | |
98 | #endif | |
d277064e | 99 | #ifdef CONFIG_USB_STORAGE_CYPRESS_ATACB |
100 | #include "cypress_atacb.h" | |
101 | #endif | |
32fe5e39 | 102 | #include "sierra_ms.h" |
1da177e4 LT |
103 | |
104 | /* Some informational data */ | |
105 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); | |
106 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); | |
107 | MODULE_LICENSE("GPL"); | |
108 | ||
109 | static unsigned int delay_use = 5; | |
110 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); | |
111 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); | |
112 | ||
d4f373e5 AS |
113 | static char *quirks; |
114 | module_param(quirks, charp, S_IRUGO); | |
115 | MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks"); | |
116 | ||
117 | struct quirks_entry { | |
118 | u16 vid, pid; | |
119 | u32 fflags; | |
120 | }; | |
121 | static struct quirks_entry *quirks_list, *quirks_end; | |
122 | ||
1da177e4 | 123 | |
a00828e9 PZ |
124 | /* |
125 | * The entries in this table correspond, line for line, | |
126 | * with the entries of us_unusual_dev_list[]. | |
1da177e4 | 127 | */ |
a00828e9 | 128 | #ifndef CONFIG_USB_LIBUSUAL |
1da177e4 LT |
129 | |
130 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ | |
131 | vendorName, productName,useProtocol, useTransport, \ | |
132 | initFunction, flags) \ | |
a00828e9 PZ |
133 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin,bcdDeviceMax), \ |
134 | .driver_info = (flags)|(USB_US_TYPE_STOR<<24) } | |
135 | ||
136 | #define USUAL_DEV(useProto, useTrans, useType) \ | |
137 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, useProto, useTrans), \ | |
138 | .driver_info = (USB_US_TYPE_STOR<<24) } | |
1da177e4 LT |
139 | |
140 | static struct usb_device_id storage_usb_ids [] = { | |
141 | ||
142 | # include "unusual_devs.h" | |
143 | #undef UNUSUAL_DEV | |
a00828e9 | 144 | #undef USUAL_DEV |
1da177e4 LT |
145 | /* Terminating entry */ |
146 | { } | |
147 | }; | |
148 | ||
149 | MODULE_DEVICE_TABLE (usb, storage_usb_ids); | |
a00828e9 | 150 | #endif /* CONFIG_USB_LIBUSUAL */ |
1da177e4 LT |
151 | |
152 | /* This is the list of devices we recognize, along with their flag data */ | |
153 | ||
154 | /* The vendor name should be kept at eight characters or less, and | |
155 | * the product name should be kept at 16 characters or less. If a device | |
156 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names | |
157 | * normally generated by a device thorugh the INQUIRY response will be | |
158 | * taken from this list, and this is the reason for the above size | |
159 | * restriction. However, if the flag is not present, then you | |
160 | * are free to use as many characters as you like. | |
161 | */ | |
162 | ||
1da177e4 LT |
163 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
164 | vendor_name, product_name, use_protocol, use_transport, \ | |
165 | init_function, Flags) \ | |
166 | { \ | |
167 | .vendorName = vendor_name, \ | |
168 | .productName = product_name, \ | |
169 | .useProtocol = use_protocol, \ | |
170 | .useTransport = use_transport, \ | |
171 | .initFunction = init_function, \ | |
a00828e9 PZ |
172 | } |
173 | ||
174 | #define USUAL_DEV(use_protocol, use_transport, use_type) \ | |
175 | { \ | |
176 | .useProtocol = use_protocol, \ | |
177 | .useTransport = use_transport, \ | |
1da177e4 LT |
178 | } |
179 | ||
180 | static struct us_unusual_dev us_unusual_dev_list[] = { | |
181 | # include "unusual_devs.h" | |
182 | # undef UNUSUAL_DEV | |
a00828e9 | 183 | # undef USUAL_DEV |
1da177e4 LT |
184 | |
185 | /* Terminating entry */ | |
186 | { NULL } | |
187 | }; | |
188 | ||
ce2596df AS |
189 | |
190 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ | |
191 | ||
192 | static int storage_suspend(struct usb_interface *iface, pm_message_t message) | |
193 | { | |
194 | struct us_data *us = usb_get_intfdata(iface); | |
195 | ||
196 | /* Wait until no command is running */ | |
4186ecf8 | 197 | mutex_lock(&us->dev_mutex); |
ce2596df | 198 | |
441b62c1 | 199 | US_DEBUGP("%s\n", __func__); |
7931e1c6 MD |
200 | if (us->suspend_resume_hook) |
201 | (us->suspend_resume_hook)(us, US_SUSPEND); | |
ce2596df | 202 | |
d526875d GKH |
203 | /* When runtime PM is working, we'll set a flag to indicate |
204 | * whether we should autoresume when a SCSI request arrives. */ | |
205 | ||
4186ecf8 | 206 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
207 | return 0; |
208 | } | |
209 | ||
210 | static int storage_resume(struct usb_interface *iface) | |
211 | { | |
212 | struct us_data *us = usb_get_intfdata(iface); | |
213 | ||
d526875d | 214 | mutex_lock(&us->dev_mutex); |
8dfe4b14 | 215 | |
441b62c1 | 216 | US_DEBUGP("%s\n", __func__); |
7931e1c6 MD |
217 | if (us->suspend_resume_hook) |
218 | (us->suspend_resume_hook)(us, US_RESUME); | |
ce2596df | 219 | |
d526875d | 220 | mutex_unlock(&us->dev_mutex); |
ce2596df AS |
221 | return 0; |
222 | } | |
223 | ||
f07600cf AS |
224 | static int storage_reset_resume(struct usb_interface *iface) |
225 | { | |
226 | struct us_data *us = usb_get_intfdata(iface); | |
227 | ||
441b62c1 | 228 | US_DEBUGP("%s\n", __func__); |
f07600cf AS |
229 | |
230 | /* Report the reset to the SCSI core */ | |
231 | usb_stor_report_bus_reset(us); | |
232 | ||
233 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
234 | * the device */ | |
235 | return 0; | |
236 | } | |
237 | ||
ce2596df | 238 | #endif /* CONFIG_PM */ |
1da177e4 | 239 | |
47104b0d AS |
240 | /* |
241 | * The next two routines get called just before and just after | |
242 | * a USB port reset, whether from this driver or a different one. | |
243 | */ | |
244 | ||
f07600cf | 245 | static int storage_pre_reset(struct usb_interface *iface) |
47104b0d AS |
246 | { |
247 | struct us_data *us = usb_get_intfdata(iface); | |
248 | ||
441b62c1 | 249 | US_DEBUGP("%s\n", __func__); |
47104b0d AS |
250 | |
251 | /* Make sure no command runs during the reset */ | |
252 | mutex_lock(&us->dev_mutex); | |
f07600cf | 253 | return 0; |
47104b0d AS |
254 | } |
255 | ||
f07600cf | 256 | static int storage_post_reset(struct usb_interface *iface) |
47104b0d AS |
257 | { |
258 | struct us_data *us = usb_get_intfdata(iface); | |
259 | ||
441b62c1 | 260 | US_DEBUGP("%s\n", __func__); |
47104b0d AS |
261 | |
262 | /* Report the reset to the SCSI core */ | |
47104b0d | 263 | usb_stor_report_bus_reset(us); |
47104b0d AS |
264 | |
265 | /* FIXME: Notify the subdrivers that they need to reinitialize | |
266 | * the device */ | |
0458d5b4 | 267 | |
f07600cf AS |
268 | mutex_unlock(&us->dev_mutex); |
269 | return 0; | |
47104b0d AS |
270 | } |
271 | ||
1da177e4 LT |
272 | /* |
273 | * fill_inquiry_response takes an unsigned char array (which must | |
274 | * be at least 36 characters) and populates the vendor name, | |
275 | * product name, and revision fields. Then the array is copied | |
276 | * into the SCSI command's response buffer (oddly enough | |
277 | * called request_buffer). data_len contains the length of the | |
278 | * data array, which again must be at least 36. | |
279 | */ | |
280 | ||
281 | void fill_inquiry_response(struct us_data *us, unsigned char *data, | |
282 | unsigned int data_len) | |
283 | { | |
284 | if (data_len<36) // You lose. | |
285 | return; | |
286 | ||
287 | if(data[0]&0x20) { /* USB device currently not connected. Return | |
288 | peripheral qualifier 001b ("...however, the | |
289 | physical device is not currently connected | |
290 | to this logical unit") and leave vendor and | |
291 | product identification empty. ("If the target | |
292 | does store some of the INQUIRY data on the | |
293 | device, it may return zeros or ASCII spaces | |
294 | (20h) in those fields until the data is | |
295 | available from the device."). */ | |
296 | memset(data+8,0,28); | |
297 | } else { | |
298 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); | |
299 | memcpy(data+8, us->unusual_dev->vendorName, | |
300 | strlen(us->unusual_dev->vendorName) > 8 ? 8 : | |
301 | strlen(us->unusual_dev->vendorName)); | |
302 | memcpy(data+16, us->unusual_dev->productName, | |
303 | strlen(us->unusual_dev->productName) > 16 ? 16 : | |
304 | strlen(us->unusual_dev->productName)); | |
305 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); | |
306 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); | |
307 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); | |
308 | data[35] = 0x30 + ((bcdDevice) & 0x0F); | |
309 | } | |
310 | ||
311 | usb_stor_set_xfer_buf(data, data_len, us->srb); | |
312 | } | |
313 | ||
314 | static int usb_stor_control_thread(void * __us) | |
315 | { | |
316 | struct us_data *us = (struct us_data *)__us; | |
317 | struct Scsi_Host *host = us_to_host(us); | |
318 | ||
1da177e4 LT |
319 | for(;;) { |
320 | US_DEBUGP("*** thread sleeping.\n"); | |
7119e3c3 | 321 | if (wait_for_completion_interruptible(&us->cmnd_ready)) |
1da177e4 | 322 | break; |
7119e3c3 | 323 | |
1da177e4 LT |
324 | US_DEBUGP("*** thread awakened.\n"); |
325 | ||
326 | /* lock the device pointers */ | |
4186ecf8 | 327 | mutex_lock(&(us->dev_mutex)); |
1da177e4 | 328 | |
543f7810 AS |
329 | /* lock access to the state */ |
330 | scsi_lock(host); | |
331 | ||
332 | /* When we are called with no command pending, we're done */ | |
333 | if (us->srb == NULL) { | |
334 | scsi_unlock(host); | |
4186ecf8 | 335 | mutex_unlock(&us->dev_mutex); |
543f7810 | 336 | US_DEBUGP("-- exiting\n"); |
1da177e4 LT |
337 | break; |
338 | } | |
339 | ||
1da177e4 | 340 | /* has the command timed out *already* ? */ |
7e4d6c38 | 341 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
342 | us->srb->result = DID_ABORT << 16; |
343 | goto SkipForAbort; | |
344 | } | |
345 | ||
346 | scsi_unlock(host); | |
347 | ||
348 | /* reject the command if the direction indicator | |
349 | * is UNKNOWN | |
350 | */ | |
351 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { | |
352 | US_DEBUGP("UNKNOWN data direction\n"); | |
353 | us->srb->result = DID_ERROR << 16; | |
354 | } | |
355 | ||
356 | /* reject if target != 0 or if LUN is higher than | |
357 | * the maximum known LUN | |
358 | */ | |
359 | else if (us->srb->device->id && | |
7e4d6c38 | 360 | !(us->fflags & US_FL_SCM_MULT_TARG)) { |
1da177e4 LT |
361 | US_DEBUGP("Bad target number (%d:%d)\n", |
362 | us->srb->device->id, us->srb->device->lun); | |
363 | us->srb->result = DID_BAD_TARGET << 16; | |
364 | } | |
365 | ||
366 | else if (us->srb->device->lun > us->max_lun) { | |
367 | US_DEBUGP("Bad LUN (%d:%d)\n", | |
368 | us->srb->device->id, us->srb->device->lun); | |
369 | us->srb->result = DID_BAD_TARGET << 16; | |
370 | } | |
371 | ||
372 | /* Handle those devices which need us to fake | |
373 | * their inquiry data */ | |
374 | else if ((us->srb->cmnd[0] == INQUIRY) && | |
7e4d6c38 | 375 | (us->fflags & US_FL_FIX_INQUIRY)) { |
1da177e4 LT |
376 | unsigned char data_ptr[36] = { |
377 | 0x00, 0x80, 0x02, 0x02, | |
378 | 0x1F, 0x00, 0x00, 0x00}; | |
379 | ||
380 | US_DEBUGP("Faking INQUIRY command\n"); | |
381 | fill_inquiry_response(us, data_ptr, 36); | |
382 | us->srb->result = SAM_STAT_GOOD; | |
383 | } | |
384 | ||
385 | /* we've got a command, let's do it! */ | |
386 | else { | |
387 | US_DEBUG(usb_stor_show_command(us->srb)); | |
388 | us->proto_handler(us->srb, us); | |
389 | } | |
390 | ||
391 | /* lock access to the state */ | |
392 | scsi_lock(host); | |
393 | ||
394 | /* indicate that the command is done */ | |
543f7810 | 395 | if (us->srb->result != DID_ABORT << 16) { |
1da177e4 LT |
396 | US_DEBUGP("scsi cmd done, result=0x%x\n", |
397 | us->srb->result); | |
398 | us->srb->scsi_done(us->srb); | |
399 | } else { | |
400 | SkipForAbort: | |
401 | US_DEBUGP("scsi command aborted\n"); | |
402 | } | |
403 | ||
404 | /* If an abort request was received we need to signal that | |
405 | * the abort has finished. The proper test for this is | |
406 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because | |
226173ed MD |
407 | * the timeout might have occurred after the command had |
408 | * already completed with a different result code. */ | |
7e4d6c38 | 409 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
1da177e4 LT |
410 | complete(&(us->notify)); |
411 | ||
226173ed | 412 | /* Allow USB transfers to resume */ |
7e4d6c38 AS |
413 | clear_bit(US_FLIDX_ABORTING, &us->dflags); |
414 | clear_bit(US_FLIDX_TIMED_OUT, &us->dflags); | |
226173ed MD |
415 | } |
416 | ||
1da177e4 LT |
417 | /* finished working on this command */ |
418 | us->srb = NULL; | |
419 | scsi_unlock(host); | |
420 | ||
421 | /* unlock the device pointers */ | |
4186ecf8 | 422 | mutex_unlock(&us->dev_mutex); |
1da177e4 LT |
423 | } /* for (;;) */ |
424 | ||
ed76cacb AS |
425 | /* Wait until we are told to stop */ |
426 | for (;;) { | |
427 | set_current_state(TASK_INTERRUPTIBLE); | |
428 | if (kthread_should_stop()) | |
429 | break; | |
430 | schedule(); | |
431 | } | |
432 | __set_current_state(TASK_RUNNING); | |
433 | return 0; | |
1da177e4 LT |
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 | { | |
441b62c1 | 443 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
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 | } | |
474 | return 0; | |
475 | } | |
476 | ||
d4f373e5 AS |
477 | /* Adjust device flags based on the "quirks=" module parameter */ |
478 | static void adjust_quirks(struct us_data *us) | |
479 | { | |
480 | u16 vid, pid; | |
481 | struct quirks_entry *q; | |
482 | unsigned int mask = (US_FL_FIX_CAPACITY | US_FL_IGNORE_DEVICE | | |
483 | US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 | | |
484 | US_FL_IGNORE_RESIDUE | US_FL_SINGLE_LUN | | |
485 | US_FL_NO_WP_DETECT); | |
486 | ||
487 | vid = le16_to_cpu(us->pusb_dev->descriptor.idVendor); | |
488 | pid = le16_to_cpu(us->pusb_dev->descriptor.idProduct); | |
489 | ||
490 | for (q = quirks_list; q != quirks_end; ++q) { | |
491 | if (q->vid == vid && q->pid == pid) { | |
492 | us->fflags = (us->fflags & ~mask) | q->fflags; | |
493 | dev_info(&us->pusb_intf->dev, "Quirks match for " | |
494 | "vid %04x pid %04x: %x\n", | |
495 | vid, pid, q->fflags); | |
496 | break; | |
497 | } | |
498 | } | |
499 | } | |
500 | ||
a00828e9 PZ |
501 | /* Find an unusual_dev descriptor (always succeeds in the current code) */ |
502 | static struct us_unusual_dev *find_unusual(const struct usb_device_id *id) | |
503 | { | |
504 | const int id_index = id - storage_usb_ids; | |
505 | return &us_unusual_dev_list[id_index]; | |
506 | } | |
507 | ||
1da177e4 | 508 | /* Get the unusual_devs entries and the string descriptors */ |
3c332422 | 509 | static int get_device_info(struct us_data *us, const struct usb_device_id *id) |
1da177e4 LT |
510 | { |
511 | struct usb_device *dev = us->pusb_dev; | |
512 | struct usb_interface_descriptor *idesc = | |
513 | &us->pusb_intf->cur_altsetting->desc; | |
a00828e9 | 514 | struct us_unusual_dev *unusual_dev = find_unusual(id); |
1da177e4 LT |
515 | |
516 | /* Store the entries */ | |
517 | us->unusual_dev = unusual_dev; | |
518 | us->subclass = (unusual_dev->useProtocol == US_SC_DEVICE) ? | |
519 | idesc->bInterfaceSubClass : | |
520 | unusual_dev->useProtocol; | |
521 | us->protocol = (unusual_dev->useTransport == US_PR_DEVICE) ? | |
522 | idesc->bInterfaceProtocol : | |
523 | unusual_dev->useTransport; | |
7e4d6c38 | 524 | us->fflags = USB_US_ORIG_FLAGS(id->driver_info); |
d4f373e5 | 525 | adjust_quirks(us); |
1da177e4 | 526 | |
7e4d6c38 | 527 | if (us->fflags & US_FL_IGNORE_DEVICE) { |
3c332422 DD |
528 | printk(KERN_INFO USB_STORAGE "device ignored\n"); |
529 | return -ENODEV; | |
530 | } | |
531 | ||
1da177e4 LT |
532 | /* |
533 | * This flag is only needed when we're in high-speed, so let's | |
534 | * disable it if we're in full-speed | |
535 | */ | |
536 | if (dev->speed != USB_SPEED_HIGH) | |
7e4d6c38 | 537 | us->fflags &= ~US_FL_GO_SLOW; |
1da177e4 LT |
538 | |
539 | /* Log a message if a non-generic unusual_dev entry contains an | |
540 | * unnecessary subclass or protocol override. This may stimulate | |
541 | * reports from users that will help us remove unneeded entries | |
542 | * from the unusual_devs.h table. | |
543 | */ | |
544 | if (id->idVendor || id->idProduct) { | |
4c4c9432 | 545 | static const char *msgs[3] = { |
1da177e4 LT |
546 | "an unneeded SubClass entry", |
547 | "an unneeded Protocol entry", | |
548 | "unneeded SubClass and Protocol entries"}; | |
549 | struct usb_device_descriptor *ddesc = &dev->descriptor; | |
550 | int msg = -1; | |
551 | ||
552 | if (unusual_dev->useProtocol != US_SC_DEVICE && | |
553 | us->subclass == idesc->bInterfaceSubClass) | |
554 | msg += 1; | |
555 | if (unusual_dev->useTransport != US_PR_DEVICE && | |
556 | us->protocol == idesc->bInterfaceProtocol) | |
557 | msg += 2; | |
7e4d6c38 | 558 | if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE)) |
1da177e4 LT |
559 | printk(KERN_NOTICE USB_STORAGE "This device " |
560 | "(%04x,%04x,%04x S %02x P %02x)" | |
5650b4dd PD |
561 | " has %s in unusual_devs.h (kernel" |
562 | " %s)\n" | |
1da177e4 | 563 | " Please send a copy of this message to " |
cef03f8f AL |
564 | "<linux-usb@vger.kernel.org> and " |
565 | "<usb-storage@lists.one-eyed-alien.net>\n", | |
1da177e4 LT |
566 | le16_to_cpu(ddesc->idVendor), |
567 | le16_to_cpu(ddesc->idProduct), | |
568 | le16_to_cpu(ddesc->bcdDevice), | |
569 | idesc->bInterfaceSubClass, | |
570 | idesc->bInterfaceProtocol, | |
5650b4dd | 571 | msgs[msg], |
00f8b0c1 | 572 | utsname()->release); |
1da177e4 | 573 | } |
3c332422 DD |
574 | |
575 | return 0; | |
1da177e4 LT |
576 | } |
577 | ||
578 | /* Get the transport settings */ | |
579 | static int get_transport(struct us_data *us) | |
580 | { | |
581 | switch (us->protocol) { | |
582 | case US_PR_CB: | |
583 | us->transport_name = "Control/Bulk"; | |
584 | us->transport = usb_stor_CB_transport; | |
585 | us->transport_reset = usb_stor_CB_reset; | |
586 | us->max_lun = 7; | |
587 | break; | |
588 | ||
589 | case US_PR_CBI: | |
590 | us->transport_name = "Control/Bulk/Interrupt"; | |
64648a9d | 591 | us->transport = usb_stor_CB_transport; |
1da177e4 LT |
592 | us->transport_reset = usb_stor_CB_reset; |
593 | us->max_lun = 7; | |
594 | break; | |
595 | ||
596 | case US_PR_BULK: | |
597 | us->transport_name = "Bulk"; | |
598 | us->transport = usb_stor_Bulk_transport; | |
599 | us->transport_reset = usb_stor_Bulk_reset; | |
600 | break; | |
601 | ||
602 | #ifdef CONFIG_USB_STORAGE_USBAT | |
b7b1e655 DD |
603 | case US_PR_USBAT: |
604 | us->transport_name = "Shuttle USBAT"; | |
1da177e4 LT |
605 | us->transport = usbat_transport; |
606 | us->transport_reset = usb_stor_CB_reset; | |
607 | us->max_lun = 1; | |
608 | break; | |
609 | #endif | |
610 | ||
611 | #ifdef CONFIG_USB_STORAGE_SDDR09 | |
612 | case US_PR_EUSB_SDDR09: | |
613 | us->transport_name = "EUSB/SDDR09"; | |
614 | us->transport = sddr09_transport; | |
615 | us->transport_reset = usb_stor_CB_reset; | |
616 | us->max_lun = 0; | |
617 | break; | |
618 | #endif | |
619 | ||
620 | #ifdef CONFIG_USB_STORAGE_SDDR55 | |
621 | case US_PR_SDDR55: | |
622 | us->transport_name = "SDDR55"; | |
623 | us->transport = sddr55_transport; | |
624 | us->transport_reset = sddr55_reset; | |
625 | us->max_lun = 0; | |
626 | break; | |
627 | #endif | |
628 | ||
629 | #ifdef CONFIG_USB_STORAGE_DPCM | |
630 | case US_PR_DPCM_USB: | |
631 | us->transport_name = "Control/Bulk-EUSB/SDDR09"; | |
632 | us->transport = dpcm_transport; | |
633 | us->transport_reset = usb_stor_CB_reset; | |
634 | us->max_lun = 1; | |
635 | break; | |
636 | #endif | |
637 | ||
638 | #ifdef CONFIG_USB_STORAGE_FREECOM | |
639 | case US_PR_FREECOM: | |
640 | us->transport_name = "Freecom"; | |
641 | us->transport = freecom_transport; | |
642 | us->transport_reset = usb_stor_freecom_reset; | |
643 | us->max_lun = 0; | |
644 | break; | |
645 | #endif | |
646 | ||
647 | #ifdef CONFIG_USB_STORAGE_DATAFAB | |
648 | case US_PR_DATAFAB: | |
649 | us->transport_name = "Datafab Bulk-Only"; | |
650 | us->transport = datafab_transport; | |
651 | us->transport_reset = usb_stor_Bulk_reset; | |
652 | us->max_lun = 1; | |
653 | break; | |
654 | #endif | |
655 | ||
656 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT | |
657 | case US_PR_JUMPSHOT: | |
658 | us->transport_name = "Lexar Jumpshot Control/Bulk"; | |
659 | us->transport = jumpshot_transport; | |
660 | us->transport_reset = usb_stor_Bulk_reset; | |
661 | us->max_lun = 1; | |
662 | break; | |
663 | #endif | |
664 | ||
b383539e DD |
665 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
666 | case US_PR_ALAUDA: | |
667 | us->transport_name = "Alauda Control/Bulk"; | |
668 | us->transport = alauda_transport; | |
669 | us->transport_reset = usb_stor_Bulk_reset; | |
670 | us->max_lun = 1; | |
671 | break; | |
672 | #endif | |
673 | ||
dfe0d3ba MD |
674 | #ifdef CONFIG_USB_STORAGE_KARMA |
675 | case US_PR_KARMA: | |
676 | us->transport_name = "Rio Karma/Bulk"; | |
677 | us->transport = rio_karma_transport; | |
678 | us->transport_reset = usb_stor_Bulk_reset; | |
679 | break; | |
680 | #endif | |
681 | ||
1da177e4 LT |
682 | default: |
683 | return -EIO; | |
684 | } | |
685 | US_DEBUGP("Transport: %s\n", us->transport_name); | |
686 | ||
687 | /* fix for single-lun devices */ | |
7e4d6c38 | 688 | if (us->fflags & US_FL_SINGLE_LUN) |
1da177e4 LT |
689 | us->max_lun = 0; |
690 | return 0; | |
691 | } | |
692 | ||
693 | /* Get the protocol settings */ | |
694 | static int get_protocol(struct us_data *us) | |
695 | { | |
696 | switch (us->subclass) { | |
697 | case US_SC_RBC: | |
698 | us->protocol_name = "Reduced Block Commands (RBC)"; | |
699 | us->proto_handler = usb_stor_transparent_scsi_command; | |
700 | break; | |
701 | ||
702 | case US_SC_8020: | |
703 | us->protocol_name = "8020i"; | |
3dae5345 | 704 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
705 | us->max_lun = 0; |
706 | break; | |
707 | ||
708 | case US_SC_QIC: | |
709 | us->protocol_name = "QIC-157"; | |
3dae5345 | 710 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
711 | us->max_lun = 0; |
712 | break; | |
713 | ||
714 | case US_SC_8070: | |
715 | us->protocol_name = "8070i"; | |
3dae5345 | 716 | us->proto_handler = usb_stor_pad12_command; |
1da177e4 LT |
717 | us->max_lun = 0; |
718 | break; | |
719 | ||
720 | case US_SC_SCSI: | |
721 | us->protocol_name = "Transparent SCSI"; | |
722 | us->proto_handler = usb_stor_transparent_scsi_command; | |
723 | break; | |
724 | ||
725 | case US_SC_UFI: | |
726 | us->protocol_name = "Uniform Floppy Interface (UFI)"; | |
727 | us->proto_handler = usb_stor_ufi_command; | |
728 | break; | |
729 | ||
730 | #ifdef CONFIG_USB_STORAGE_ISD200 | |
731 | case US_SC_ISD200: | |
732 | us->protocol_name = "ISD200 ATA/ATAPI"; | |
733 | us->proto_handler = isd200_ata_command; | |
734 | break; | |
735 | #endif | |
736 | ||
d277064e | 737 | #ifdef CONFIG_USB_STORAGE_CYPRESS_ATACB |
738 | case US_SC_CYP_ATACB: | |
739 | us->protocol_name = "Transparent SCSI with Cypress ATACB"; | |
740 | us->proto_handler = cypress_atacb_passthrough; | |
741 | break; | |
742 | #endif | |
743 | ||
1da177e4 LT |
744 | default: |
745 | return -EIO; | |
746 | } | |
747 | US_DEBUGP("Protocol: %s\n", us->protocol_name); | |
748 | return 0; | |
749 | } | |
750 | ||
751 | /* Get the pipe settings */ | |
752 | static int get_pipes(struct us_data *us) | |
753 | { | |
754 | struct usb_host_interface *altsetting = | |
755 | us->pusb_intf->cur_altsetting; | |
756 | int i; | |
757 | struct usb_endpoint_descriptor *ep; | |
758 | struct usb_endpoint_descriptor *ep_in = NULL; | |
759 | struct usb_endpoint_descriptor *ep_out = NULL; | |
760 | struct usb_endpoint_descriptor *ep_int = NULL; | |
761 | ||
762 | /* | |
1096f780 | 763 | * Find the first endpoint of each type we need. |
1da177e4 | 764 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
1096f780 | 765 | * An optional interrupt-in is OK (necessary for CBI protocol). |
1da177e4 LT |
766 | * We will ignore any others. |
767 | */ | |
768 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { | |
769 | ep = &altsetting->endpoint[i].desc; | |
770 | ||
04720747 | 771 | if (usb_endpoint_xfer_bulk(ep)) { |
1096f780 AS |
772 | if (usb_endpoint_dir_in(ep)) { |
773 | if (!ep_in) | |
774 | ep_in = ep; | |
775 | } else { | |
776 | if (!ep_out) | |
777 | ep_out = ep; | |
778 | } | |
1da177e4 LT |
779 | } |
780 | ||
1096f780 AS |
781 | else if (usb_endpoint_is_int_in(ep)) { |
782 | if (!ep_int) | |
783 | ep_int = ep; | |
1da177e4 LT |
784 | } |
785 | } | |
786 | ||
787 | if (!ep_in || !ep_out || (us->protocol == US_PR_CBI && !ep_int)) { | |
788 | US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n"); | |
789 | return -EIO; | |
790 | } | |
791 | ||
792 | /* Calculate and store the pipe values */ | |
793 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); | |
794 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); | |
795 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, | |
796 | ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
797 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, | |
798 | ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
799 | if (ep_int) { | |
800 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, | |
801 | ep_int->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
802 | us->ep_bInterval = ep_int->bInterval; | |
803 | } | |
804 | return 0; | |
805 | } | |
806 | ||
807 | /* Initialize all the dynamic resources we need */ | |
808 | static int usb_stor_acquire_resources(struct us_data *us) | |
809 | { | |
810 | int p; | |
3f13e66e | 811 | struct task_struct *th; |
1da177e4 LT |
812 | |
813 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); | |
814 | if (!us->current_urb) { | |
815 | US_DEBUGP("URB allocation failed\n"); | |
816 | return -ENOMEM; | |
817 | } | |
818 | ||
1da177e4 LT |
819 | /* Just before we start our control thread, initialize |
820 | * the device if it needs initialization */ | |
b876aef7 AS |
821 | if (us->unusual_dev->initFunction) { |
822 | p = us->unusual_dev->initFunction(us); | |
823 | if (p) | |
824 | return p; | |
825 | } | |
1da177e4 LT |
826 | |
827 | /* Start up our control thread */ | |
ed76cacb | 828 | th = kthread_run(usb_stor_control_thread, us, "usb-storage"); |
3f13e66e | 829 | if (IS_ERR(th)) { |
1da177e4 LT |
830 | printk(KERN_WARNING USB_STORAGE |
831 | "Unable to start control thread\n"); | |
3f13e66e | 832 | return PTR_ERR(th); |
1da177e4 | 833 | } |
ed76cacb | 834 | us->ctl_thread = th; |
1da177e4 LT |
835 | |
836 | return 0; | |
837 | } | |
838 | ||
839 | /* Release all our dynamic resources */ | |
840 | static void usb_stor_release_resources(struct us_data *us) | |
841 | { | |
441b62c1 | 842 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
843 | |
844 | /* Tell the control thread to exit. The SCSI host must | |
543f7810 AS |
845 | * already have been removed and the DISCONNECTING flag set |
846 | * so that we won't accept any more commands. | |
1da177e4 LT |
847 | */ |
848 | US_DEBUGP("-- sending exit command to thread\n"); | |
7119e3c3 | 849 | complete(&us->cmnd_ready); |
ed76cacb AS |
850 | if (us->ctl_thread) |
851 | kthread_stop(us->ctl_thread); | |
1da177e4 LT |
852 | |
853 | /* Call the destructor routine, if it exists */ | |
854 | if (us->extra_destructor) { | |
855 | US_DEBUGP("-- calling extra_destructor()\n"); | |
856 | us->extra_destructor(us->extra); | |
857 | } | |
858 | ||
859 | /* Free the extra data and the URB */ | |
860 | kfree(us->extra); | |
861 | usb_free_urb(us->current_urb); | |
862 | } | |
863 | ||
864 | /* Dissociate from the USB device */ | |
865 | static void dissociate_dev(struct us_data *us) | |
866 | { | |
441b62c1 | 867 | US_DEBUGP("-- %s\n", __func__); |
1da177e4 LT |
868 | |
869 | /* Free the device-related DMA-mapped buffers */ | |
870 | if (us->cr) | |
871 | usb_buffer_free(us->pusb_dev, sizeof(*us->cr), us->cr, | |
872 | us->cr_dma); | |
873 | if (us->iobuf) | |
874 | usb_buffer_free(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, | |
875 | us->iobuf_dma); | |
876 | ||
877 | /* Remove our private data from the interface */ | |
878 | usb_set_intfdata(us->pusb_intf, NULL); | |
879 | } | |
880 | ||
543f7810 AS |
881 | /* First stage of disconnect processing: stop SCSI scanning, |
882 | * remove the host, and stop accepting new commands | |
883 | */ | |
77f46328 MD |
884 | static void quiesce_and_remove_host(struct us_data *us) |
885 | { | |
eecd11ed AS |
886 | struct Scsi_Host *host = us_to_host(us); |
887 | ||
543f7810 AS |
888 | /* If the device is really gone, cut short reset delays */ |
889 | if (us->pusb_dev->state == USB_STATE_NOTATTACHED) | |
890 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); | |
77f46328 | 891 | |
543f7810 AS |
892 | /* Prevent SCSI-scanning (if it hasn't started yet) |
893 | * and wait for the SCSI-scanning thread to stop. | |
894 | */ | |
895 | set_bit(US_FLIDX_DONT_SCAN, &us->dflags); | |
896 | wake_up(&us->delay_wait); | |
897 | wait_for_completion(&us->scanning_done); | |
26186ba7 | 898 | |
543f7810 AS |
899 | /* Removing the host will perform an orderly shutdown: caches |
900 | * synchronized, disks spun down, etc. | |
901 | */ | |
eecd11ed | 902 | scsi_remove_host(host); |
2f67cd5b | 903 | |
543f7810 AS |
904 | /* Prevent any new commands from being accepted and cut short |
905 | * reset delays. | |
906 | */ | |
907 | scsi_lock(host); | |
908 | set_bit(US_FLIDX_DISCONNECTING, &us->dflags); | |
909 | scsi_unlock(host); | |
910 | wake_up(&us->delay_wait); | |
77f46328 MD |
911 | } |
912 | ||
913 | /* Second stage of disconnect processing: deallocate all resources */ | |
914 | static void release_everything(struct us_data *us) | |
915 | { | |
916 | usb_stor_release_resources(us); | |
917 | dissociate_dev(us); | |
918 | ||
919 | /* Drop our reference to the host; the SCSI core will free it | |
920 | * (and "us" along with it) when the refcount becomes 0. */ | |
921 | scsi_host_put(us_to_host(us)); | |
922 | } | |
923 | ||
1da177e4 LT |
924 | /* Thread to carry out delayed SCSI-device scanning */ |
925 | static int usb_stor_scan_thread(void * __us) | |
926 | { | |
927 | struct us_data *us = (struct us_data *)__us; | |
928 | ||
1da177e4 LT |
929 | printk(KERN_DEBUG |
930 | "usb-storage: device found at %d\n", us->pusb_dev->devnum); | |
931 | ||
83144186 | 932 | set_freezable(); |
1da177e4 LT |
933 | /* Wait for the timeout to expire or for a disconnect */ |
934 | if (delay_use > 0) { | |
935 | printk(KERN_DEBUG "usb-storage: waiting for device " | |
936 | "to settle before scanning\n"); | |
e42837bc | 937 | wait_event_freezable_timeout(us->delay_wait, |
543f7810 | 938 | test_bit(US_FLIDX_DONT_SCAN, &us->dflags), |
1da177e4 | 939 | delay_use * HZ); |
1da177e4 LT |
940 | } |
941 | ||
942 | /* If the device is still connected, perform the scanning */ | |
543f7810 | 943 | if (!test_bit(US_FLIDX_DONT_SCAN, &us->dflags)) { |
b876aef7 AS |
944 | |
945 | /* For bulk-only devices, determine the max LUN value */ | |
946 | if (us->protocol == US_PR_BULK && | |
7e4d6c38 | 947 | !(us->fflags & US_FL_SINGLE_LUN)) { |
4186ecf8 | 948 | mutex_lock(&us->dev_mutex); |
b876aef7 | 949 | us->max_lun = usb_stor_Bulk_max_lun(us); |
4186ecf8 | 950 | mutex_unlock(&us->dev_mutex); |
b876aef7 | 951 | } |
1da177e4 LT |
952 | scsi_scan_host(us_to_host(us)); |
953 | printk(KERN_DEBUG "usb-storage: device scan complete\n"); | |
954 | ||
955 | /* Should we unbind if no devices were detected? */ | |
956 | } | |
957 | ||
2f67cd5b | 958 | complete_and_exit(&us->scanning_done, 0); |
1da177e4 LT |
959 | } |
960 | ||
961 | ||
962 | /* Probe to see if we can drive a newly-connected USB device */ | |
963 | static int storage_probe(struct usb_interface *intf, | |
964 | const struct usb_device_id *id) | |
965 | { | |
966 | struct Scsi_Host *host; | |
967 | struct us_data *us; | |
1da177e4 | 968 | int result; |
3f13e66e | 969 | struct task_struct *th; |
1da177e4 | 970 | |
a00828e9 PZ |
971 | if (usb_usual_check_type(id, USB_US_TYPE_STOR)) |
972 | return -ENXIO; | |
973 | ||
1da177e4 LT |
974 | US_DEBUGP("USB Mass Storage device detected\n"); |
975 | ||
976 | /* | |
977 | * Ask the SCSI layer to allocate a host structure, with extra | |
978 | * space at the end for our private us_data structure. | |
979 | */ | |
980 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); | |
981 | if (!host) { | |
982 | printk(KERN_WARNING USB_STORAGE | |
983 | "Unable to allocate the scsi host\n"); | |
984 | return -ENOMEM; | |
985 | } | |
986 | ||
17f06022 RS |
987 | /* |
988 | * Allow 16-byte CDBs and thus > 2TB | |
989 | */ | |
990 | host->max_cmd_len = 16; | |
1da177e4 LT |
991 | us = host_to_us(host); |
992 | memset(us, 0, sizeof(struct us_data)); | |
4186ecf8 | 993 | mutex_init(&(us->dev_mutex)); |
7119e3c3 | 994 | init_completion(&us->cmnd_ready); |
1da177e4 LT |
995 | init_completion(&(us->notify)); |
996 | init_waitqueue_head(&us->delay_wait); | |
2f67cd5b | 997 | init_completion(&us->scanning_done); |
1da177e4 LT |
998 | |
999 | /* Associate the us_data structure with the USB device */ | |
1000 | result = associate_dev(us, intf); | |
1001 | if (result) | |
1002 | goto BadDevice; | |
1003 | ||
1004 | /* | |
1005 | * Get the unusual_devs entries and the descriptors | |
1006 | * | |
1007 | * id_index is calculated in the declaration to be the index number | |
1008 | * of the match from the usb_device_id table, so we can find the | |
1009 | * corresponding entry in the private table. | |
1010 | */ | |
3c332422 DD |
1011 | result = get_device_info(us, id); |
1012 | if (result) | |
1013 | goto BadDevice; | |
1da177e4 | 1014 | |
1da177e4 LT |
1015 | /* Get the transport, protocol, and pipe settings */ |
1016 | result = get_transport(us); | |
1017 | if (result) | |
1018 | goto BadDevice; | |
1019 | result = get_protocol(us); | |
1020 | if (result) | |
1021 | goto BadDevice; | |
1022 | result = get_pipes(us); | |
1023 | if (result) | |
1024 | goto BadDevice; | |
1025 | ||
1026 | /* Acquire all the other resources and add the host */ | |
1027 | result = usb_stor_acquire_resources(us); | |
1028 | if (result) | |
1029 | goto BadDevice; | |
1030 | result = scsi_add_host(host, &intf->dev); | |
1031 | if (result) { | |
1032 | printk(KERN_WARNING USB_STORAGE | |
1033 | "Unable to add the scsi host\n"); | |
1034 | goto BadDevice; | |
1035 | } | |
1036 | ||
1037 | /* Start up the thread for delayed SCSI-device scanning */ | |
3f13e66e AS |
1038 | th = kthread_create(usb_stor_scan_thread, us, "usb-stor-scan"); |
1039 | if (IS_ERR(th)) { | |
1da177e4 LT |
1040 | printk(KERN_WARNING USB_STORAGE |
1041 | "Unable to start the device-scanning thread\n"); | |
543f7810 | 1042 | complete(&us->scanning_done); |
77f46328 | 1043 | quiesce_and_remove_host(us); |
3f13e66e | 1044 | result = PTR_ERR(th); |
1da177e4 LT |
1045 | goto BadDevice; |
1046 | } | |
1da177e4 | 1047 | |
3f13e66e | 1048 | wake_up_process(th); |
1da177e4 LT |
1049 | |
1050 | return 0; | |
1051 | ||
1052 | /* We come here if there are any problems */ | |
1053 | BadDevice: | |
1054 | US_DEBUGP("storage_probe() failed\n"); | |
77f46328 | 1055 | release_everything(us); |
1da177e4 LT |
1056 | return result; |
1057 | } | |
1058 | ||
1059 | /* Handle a disconnect event from the USB core */ | |
1060 | static void storage_disconnect(struct usb_interface *intf) | |
1061 | { | |
1062 | struct us_data *us = usb_get_intfdata(intf); | |
1063 | ||
1064 | US_DEBUGP("storage_disconnect() called\n"); | |
77f46328 MD |
1065 | quiesce_and_remove_host(us); |
1066 | release_everything(us); | |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | /*********************************************************************** | |
1070 | * Initialization and registration | |
1071 | ***********************************************************************/ | |
1072 | ||
ce2596df | 1073 | static struct usb_driver usb_storage_driver = { |
ce2596df AS |
1074 | .name = "usb-storage", |
1075 | .probe = storage_probe, | |
1076 | .disconnect = storage_disconnect, | |
1077 | #ifdef CONFIG_PM | |
1078 | .suspend = storage_suspend, | |
1079 | .resume = storage_resume, | |
f07600cf | 1080 | .reset_resume = storage_reset_resume, |
ce2596df | 1081 | #endif |
47104b0d AS |
1082 | .pre_reset = storage_pre_reset, |
1083 | .post_reset = storage_post_reset, | |
ce2596df | 1084 | .id_table = storage_usb_ids, |
543f7810 | 1085 | .soft_unbind = 1, |
ce2596df AS |
1086 | }; |
1087 | ||
d4f373e5 AS |
1088 | /* Works only for digits and letters, but small and fast */ |
1089 | #define TOLOWER(x) ((x) | 0x20) | |
1090 | ||
1091 | static void __init parse_quirks(void) | |
1092 | { | |
1093 | int n, i; | |
1094 | char *p; | |
1095 | ||
1096 | if (!quirks) | |
1097 | return; | |
1098 | ||
1099 | /* Count the ':' characters to get 2 * the number of entries */ | |
1100 | n = 0; | |
1101 | for (p = quirks; *p; ++p) { | |
1102 | if (*p == ':') | |
1103 | ++n; | |
1104 | } | |
1105 | n /= 2; | |
1106 | if (n == 0) | |
1107 | return; /* Don't allocate 0 bytes */ | |
1108 | ||
1109 | quirks_list = kmalloc(n * sizeof(*quirks_list), GFP_KERNEL); | |
1110 | if (!quirks_list) | |
1111 | return; | |
1112 | ||
1113 | p = quirks; | |
1114 | quirks_end = quirks_list; | |
1115 | for (i = 0; i < n && *p; ++i) { | |
1116 | unsigned f = 0; | |
1117 | ||
1118 | /* Each entry consists of VID:PID:flags */ | |
1119 | quirks_end->vid = simple_strtoul(p, &p, 16); | |
1120 | if (*p != ':') | |
1121 | goto skip_to_next; | |
1122 | quirks_end->pid = simple_strtoul(p+1, &p, 16); | |
1123 | if (*p != ':') | |
1124 | goto skip_to_next; | |
1125 | ||
1126 | while (*++p && *p != ',') { | |
1127 | switch (TOLOWER(*p)) { | |
1128 | case 'c': | |
1129 | f |= US_FL_FIX_CAPACITY; | |
1130 | break; | |
1131 | case 'i': | |
1132 | f |= US_FL_IGNORE_DEVICE; | |
1133 | break; | |
1134 | case 'l': | |
1135 | f |= US_FL_NOT_LOCKABLE; | |
1136 | break; | |
1137 | case 'm': | |
1138 | f |= US_FL_MAX_SECTORS_64; | |
1139 | break; | |
1140 | case 'r': | |
1141 | f |= US_FL_IGNORE_RESIDUE; | |
1142 | break; | |
1143 | case 's': | |
1144 | f |= US_FL_SINGLE_LUN; | |
1145 | break; | |
1146 | case 'w': | |
1147 | f |= US_FL_NO_WP_DETECT; | |
1148 | break; | |
1149 | /* Ignore unrecognized flag characters */ | |
1150 | } | |
1151 | } | |
1152 | quirks_end->fflags = f; | |
1153 | ++quirks_end; | |
1154 | ||
1155 | skip_to_next: | |
1156 | /* Entries are separated by commas */ | |
1157 | while (*p) { | |
1158 | if (*p++ == ',') | |
1159 | break; | |
1160 | } | |
1161 | } /* for (i = 0; ...) */ | |
1162 | } | |
1163 | ||
1da177e4 LT |
1164 | static int __init usb_stor_init(void) |
1165 | { | |
1166 | int retval; | |
d4f373e5 | 1167 | |
1da177e4 | 1168 | printk(KERN_INFO "Initializing USB Mass Storage driver...\n"); |
d4f373e5 | 1169 | parse_quirks(); |
1da177e4 LT |
1170 | |
1171 | /* register the driver, return usb_register return code if error */ | |
1172 | retval = usb_register(&usb_storage_driver); | |
a00828e9 | 1173 | if (retval == 0) { |
1da177e4 | 1174 | printk(KERN_INFO "USB Mass Storage support registered.\n"); |
a00828e9 PZ |
1175 | usb_usual_set_present(USB_US_TYPE_STOR); |
1176 | } | |
1da177e4 LT |
1177 | return retval; |
1178 | } | |
1179 | ||
1180 | static void __exit usb_stor_exit(void) | |
1181 | { | |
1182 | US_DEBUGP("usb_stor_exit() called\n"); | |
1183 | ||
1184 | /* Deregister the driver | |
1185 | * This will cause disconnect() to be called for each | |
1186 | * attached unit | |
1187 | */ | |
1188 | US_DEBUGP("-- calling usb_deregister()\n"); | |
1189 | usb_deregister(&usb_storage_driver) ; | |
1190 | ||
a00828e9 | 1191 | usb_usual_clear_present(USB_US_TYPE_STOR); |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | module_init(usb_stor_init); | |
1195 | module_exit(usb_stor_exit); |