Commit | Line | Data |
---|---|---|
5b775f67 | 1 | /** |
af901ca1 | 2 | * drivers/usb/class/usbtmc.c - USB Test & Measurement class driver |
5b775f67 GKH |
3 | * |
4 | * Copyright (C) 2007 Stefan Kopp, Gechingen, Germany | |
5 | * Copyright (C) 2008 Novell, Inc. | |
6 | * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version 2 | |
11 | * of the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * The GNU General Public License is available at | |
19 | * http://www.gnu.org/copyleft/gpl.html. | |
20 | */ | |
21 | ||
22 | #include <linux/init.h> | |
23 | #include <linux/module.h> | |
857cc4df | 24 | #include <linux/kernel.h> |
5b775f67 GKH |
25 | #include <linux/fs.h> |
26 | #include <linux/uaccess.h> | |
27 | #include <linux/kref.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/usb.h> | |
30 | #include <linux/usb/tmc.h> | |
31 | ||
32 | ||
33 | #define USBTMC_MINOR_BASE 176 | |
34 | ||
35 | /* | |
36 | * Size of driver internal IO buffer. Must be multiple of 4 and at least as | |
37 | * large as wMaxPacketSize (which is usually 512 bytes). | |
38 | */ | |
39 | #define USBTMC_SIZE_IOBUFFER 2048 | |
40 | ||
41 | /* Default USB timeout (in milliseconds) */ | |
35f76e89 | 42 | #define USBTMC_TIMEOUT 5000 |
5b775f67 GKH |
43 | |
44 | /* | |
45 | * Maximum number of read cycles to empty bulk in endpoint during CLEAR and | |
46 | * ABORT_BULK_IN requests. Ends the loop if (for whatever reason) a short | |
47 | * packet is never read. | |
48 | */ | |
49 | #define USBTMC_MAX_READS_TO_CLEAR_BULK_IN 100 | |
50 | ||
51 | static struct usb_device_id usbtmc_devices[] = { | |
52 | { USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 0), }, | |
228dd05d | 53 | { USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 1), }, |
5b775f67 GKH |
54 | { 0, } /* terminating entry */ |
55 | }; | |
5413aa46 | 56 | MODULE_DEVICE_TABLE(usb, usbtmc_devices); |
5b775f67 GKH |
57 | |
58 | /* | |
59 | * This structure is the capabilities for the device | |
d0a38365 GI |
60 | * See section 4.2.1.8 of the USBTMC specification, |
61 | * and section 4.2.2 of the USBTMC usb488 subclass | |
62 | * specification for details. | |
5b775f67 GKH |
63 | */ |
64 | struct usbtmc_dev_capabilities { | |
65 | __u8 interface_capabilities; | |
66 | __u8 device_capabilities; | |
67 | __u8 usb488_interface_capabilities; | |
68 | __u8 usb488_device_capabilities; | |
69 | }; | |
70 | ||
71 | /* This structure holds private data for each USBTMC device. One copy is | |
72 | * allocated for each USBTMC device in the driver's probe function. | |
73 | */ | |
74 | struct usbtmc_device_data { | |
75 | const struct usb_device_id *id; | |
76 | struct usb_device *usb_dev; | |
77 | struct usb_interface *intf; | |
78 | ||
79 | unsigned int bulk_in; | |
80 | unsigned int bulk_out; | |
81 | ||
82 | u8 bTag; | |
83 | u8 bTag_last_write; /* needed for abort */ | |
84 | u8 bTag_last_read; /* needed for abort */ | |
85 | ||
86 | /* attributes from the USB TMC spec for this device */ | |
87 | u8 TermChar; | |
88 | bool TermCharEnabled; | |
89 | bool auto_abort; | |
90 | ||
86286883 ON |
91 | bool zombie; /* fd of disconnected device */ |
92 | ||
5b775f67 GKH |
93 | struct usbtmc_dev_capabilities capabilities; |
94 | struct kref kref; | |
95 | struct mutex io_mutex; /* only one i/o function running at a time */ | |
96 | }; | |
97 | #define to_usbtmc_data(d) container_of(d, struct usbtmc_device_data, kref) | |
98 | ||
99 | /* Forward declarations */ | |
100 | static struct usb_driver usbtmc_driver; | |
101 | ||
102 | static void usbtmc_delete(struct kref *kref) | |
103 | { | |
104 | struct usbtmc_device_data *data = to_usbtmc_data(kref); | |
105 | ||
106 | usb_put_dev(data->usb_dev); | |
107 | kfree(data); | |
108 | } | |
109 | ||
110 | static int usbtmc_open(struct inode *inode, struct file *filp) | |
111 | { | |
112 | struct usb_interface *intf; | |
113 | struct usbtmc_device_data *data; | |
5b10916e | 114 | int retval = 0; |
5b775f67 GKH |
115 | |
116 | intf = usb_find_interface(&usbtmc_driver, iminor(inode)); | |
117 | if (!intf) { | |
118 | printk(KERN_ERR KBUILD_MODNAME | |
119 | ": can not find device for minor %d", iminor(inode)); | |
5b10916e | 120 | retval = -ENODEV; |
5b775f67 GKH |
121 | goto exit; |
122 | } | |
123 | ||
124 | data = usb_get_intfdata(intf); | |
125 | kref_get(&data->kref); | |
126 | ||
127 | /* Store pointer in file structure's private data field */ | |
128 | filp->private_data = data; | |
129 | ||
130 | exit: | |
131 | return retval; | |
132 | } | |
133 | ||
134 | static int usbtmc_release(struct inode *inode, struct file *file) | |
135 | { | |
136 | struct usbtmc_device_data *data = file->private_data; | |
137 | ||
138 | kref_put(&data->kref, usbtmc_delete); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int usbtmc_ioctl_abort_bulk_in(struct usbtmc_device_data *data) | |
143 | { | |
b361a6e3 | 144 | u8 *buffer; |
5b775f67 GKH |
145 | struct device *dev; |
146 | int rv; | |
147 | int n; | |
148 | int actual; | |
149 | struct usb_host_interface *current_setting; | |
150 | int max_size; | |
151 | ||
152 | dev = &data->intf->dev; | |
153 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
154 | if (!buffer) | |
155 | return -ENOMEM; | |
156 | ||
157 | rv = usb_control_msg(data->usb_dev, | |
158 | usb_rcvctrlpipe(data->usb_dev, 0), | |
159 | USBTMC_REQUEST_INITIATE_ABORT_BULK_IN, | |
160 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
161 | data->bTag_last_read, data->bulk_in, | |
162 | buffer, 2, USBTMC_TIMEOUT); | |
163 | ||
164 | if (rv < 0) { | |
165 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
166 | goto exit; | |
167 | } | |
168 | ||
169 | dev_dbg(dev, "INITIATE_ABORT_BULK_IN returned %x\n", buffer[0]); | |
170 | ||
171 | if (buffer[0] == USBTMC_STATUS_FAILED) { | |
172 | rv = 0; | |
173 | goto exit; | |
174 | } | |
175 | ||
176 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
177 | dev_err(dev, "INITIATE_ABORT_BULK_IN returned %x\n", | |
178 | buffer[0]); | |
179 | rv = -EPERM; | |
180 | goto exit; | |
181 | } | |
182 | ||
183 | max_size = 0; | |
184 | current_setting = data->intf->cur_altsetting; | |
185 | for (n = 0; n < current_setting->desc.bNumEndpoints; n++) | |
186 | if (current_setting->endpoint[n].desc.bEndpointAddress == | |
187 | data->bulk_in) | |
188 | max_size = le16_to_cpu(current_setting->endpoint[n]. | |
189 | desc.wMaxPacketSize); | |
190 | ||
191 | if (max_size == 0) { | |
192 | dev_err(dev, "Couldn't get wMaxPacketSize\n"); | |
193 | rv = -EPERM; | |
194 | goto exit; | |
195 | } | |
196 | ||
197 | dev_dbg(&data->intf->dev, "wMaxPacketSize is %d\n", max_size); | |
198 | ||
199 | n = 0; | |
200 | ||
201 | do { | |
202 | dev_dbg(dev, "Reading from bulk in EP\n"); | |
203 | ||
204 | rv = usb_bulk_msg(data->usb_dev, | |
205 | usb_rcvbulkpipe(data->usb_dev, | |
206 | data->bulk_in), | |
207 | buffer, USBTMC_SIZE_IOBUFFER, | |
208 | &actual, USBTMC_TIMEOUT); | |
209 | ||
210 | n++; | |
211 | ||
212 | if (rv < 0) { | |
213 | dev_err(dev, "usb_bulk_msg returned %d\n", rv); | |
214 | goto exit; | |
215 | } | |
216 | } while ((actual == max_size) && | |
217 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)); | |
218 | ||
219 | if (actual == max_size) { | |
220 | dev_err(dev, "Couldn't clear device buffer within %d cycles\n", | |
221 | USBTMC_MAX_READS_TO_CLEAR_BULK_IN); | |
222 | rv = -EPERM; | |
223 | goto exit; | |
224 | } | |
225 | ||
226 | n = 0; | |
227 | ||
228 | usbtmc_abort_bulk_in_status: | |
229 | rv = usb_control_msg(data->usb_dev, | |
230 | usb_rcvctrlpipe(data->usb_dev, 0), | |
231 | USBTMC_REQUEST_CHECK_ABORT_BULK_IN_STATUS, | |
232 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
233 | 0, data->bulk_in, buffer, 0x08, | |
234 | USBTMC_TIMEOUT); | |
235 | ||
236 | if (rv < 0) { | |
237 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
238 | goto exit; | |
239 | } | |
240 | ||
241 | dev_dbg(dev, "INITIATE_ABORT_BULK_IN returned %x\n", buffer[0]); | |
242 | ||
243 | if (buffer[0] == USBTMC_STATUS_SUCCESS) { | |
244 | rv = 0; | |
245 | goto exit; | |
246 | } | |
247 | ||
248 | if (buffer[0] != USBTMC_STATUS_PENDING) { | |
249 | dev_err(dev, "INITIATE_ABORT_BULK_IN returned %x\n", buffer[0]); | |
250 | rv = -EPERM; | |
251 | goto exit; | |
252 | } | |
253 | ||
254 | if (buffer[1] == 1) | |
255 | do { | |
256 | dev_dbg(dev, "Reading from bulk in EP\n"); | |
257 | ||
258 | rv = usb_bulk_msg(data->usb_dev, | |
259 | usb_rcvbulkpipe(data->usb_dev, | |
260 | data->bulk_in), | |
261 | buffer, USBTMC_SIZE_IOBUFFER, | |
262 | &actual, USBTMC_TIMEOUT); | |
263 | ||
264 | n++; | |
265 | ||
266 | if (rv < 0) { | |
267 | dev_err(dev, "usb_bulk_msg returned %d\n", rv); | |
268 | goto exit; | |
269 | } | |
270 | } while ((actual = max_size) && | |
271 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)); | |
272 | ||
273 | if (actual == max_size) { | |
274 | dev_err(dev, "Couldn't clear device buffer within %d cycles\n", | |
275 | USBTMC_MAX_READS_TO_CLEAR_BULK_IN); | |
276 | rv = -EPERM; | |
277 | goto exit; | |
278 | } | |
279 | ||
280 | goto usbtmc_abort_bulk_in_status; | |
281 | ||
282 | exit: | |
283 | kfree(buffer); | |
284 | return rv; | |
285 | ||
286 | } | |
287 | ||
288 | static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data) | |
289 | { | |
290 | struct device *dev; | |
291 | u8 *buffer; | |
292 | int rv; | |
293 | int n; | |
294 | ||
295 | dev = &data->intf->dev; | |
296 | ||
297 | buffer = kmalloc(8, GFP_KERNEL); | |
298 | if (!buffer) | |
299 | return -ENOMEM; | |
300 | ||
301 | rv = usb_control_msg(data->usb_dev, | |
302 | usb_rcvctrlpipe(data->usb_dev, 0), | |
303 | USBTMC_REQUEST_INITIATE_ABORT_BULK_OUT, | |
304 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
305 | data->bTag_last_write, data->bulk_out, | |
306 | buffer, 2, USBTMC_TIMEOUT); | |
307 | ||
308 | if (rv < 0) { | |
309 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
310 | goto exit; | |
311 | } | |
312 | ||
313 | dev_dbg(dev, "INITIATE_ABORT_BULK_OUT returned %x\n", buffer[0]); | |
314 | ||
315 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
316 | dev_err(dev, "INITIATE_ABORT_BULK_OUT returned %x\n", | |
317 | buffer[0]); | |
318 | rv = -EPERM; | |
319 | goto exit; | |
320 | } | |
321 | ||
322 | n = 0; | |
323 | ||
324 | usbtmc_abort_bulk_out_check_status: | |
325 | rv = usb_control_msg(data->usb_dev, | |
326 | usb_rcvctrlpipe(data->usb_dev, 0), | |
327 | USBTMC_REQUEST_CHECK_ABORT_BULK_OUT_STATUS, | |
328 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
329 | 0, data->bulk_out, buffer, 0x08, | |
330 | USBTMC_TIMEOUT); | |
331 | n++; | |
332 | if (rv < 0) { | |
333 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
334 | goto exit; | |
335 | } | |
336 | ||
337 | dev_dbg(dev, "CHECK_ABORT_BULK_OUT returned %x\n", buffer[0]); | |
338 | ||
339 | if (buffer[0] == USBTMC_STATUS_SUCCESS) | |
340 | goto usbtmc_abort_bulk_out_clear_halt; | |
341 | ||
342 | if ((buffer[0] == USBTMC_STATUS_PENDING) && | |
343 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)) | |
344 | goto usbtmc_abort_bulk_out_check_status; | |
345 | ||
346 | rv = -EPERM; | |
347 | goto exit; | |
348 | ||
349 | usbtmc_abort_bulk_out_clear_halt: | |
350 | rv = usb_control_msg(data->usb_dev, | |
351 | usb_sndctrlpipe(data->usb_dev, 0), | |
352 | USB_REQ_CLEAR_FEATURE, | |
353 | USB_DIR_OUT | USB_TYPE_STANDARD | | |
354 | USB_RECIP_ENDPOINT, | |
355 | USB_ENDPOINT_HALT, data->bulk_out, buffer, | |
356 | 0, USBTMC_TIMEOUT); | |
357 | ||
358 | if (rv < 0) { | |
359 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
360 | goto exit; | |
361 | } | |
362 | rv = 0; | |
363 | ||
364 | exit: | |
365 | kfree(buffer); | |
366 | return rv; | |
367 | } | |
368 | ||
369 | static ssize_t usbtmc_read(struct file *filp, char __user *buf, | |
370 | size_t count, loff_t *f_pos) | |
371 | { | |
372 | struct usbtmc_device_data *data; | |
373 | struct device *dev; | |
665d7662 | 374 | u32 n_characters; |
5b775f67 GKH |
375 | u8 *buffer; |
376 | int actual; | |
665d7662 GS |
377 | size_t done; |
378 | size_t remaining; | |
5b775f67 | 379 | int retval; |
665d7662 | 380 | size_t this_part; |
5b775f67 GKH |
381 | |
382 | /* Get pointer to private data structure */ | |
383 | data = filp->private_data; | |
384 | dev = &data->intf->dev; | |
385 | ||
386 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
387 | if (!buffer) | |
388 | return -ENOMEM; | |
389 | ||
390 | mutex_lock(&data->io_mutex); | |
86286883 ON |
391 | if (data->zombie) { |
392 | retval = -ENODEV; | |
393 | goto exit; | |
394 | } | |
5b775f67 GKH |
395 | |
396 | remaining = count; | |
397 | done = 0; | |
398 | ||
399 | while (remaining > 0) { | |
400 | if (remaining > USBTMC_SIZE_IOBUFFER - 12 - 3) | |
401 | this_part = USBTMC_SIZE_IOBUFFER - 12 - 3; | |
402 | else | |
403 | this_part = remaining; | |
404 | ||
405 | /* Setup IO buffer for DEV_DEP_MSG_IN message | |
406 | * Refer to class specs for details | |
407 | */ | |
408 | buffer[0] = 2; | |
409 | buffer[1] = data->bTag; | |
410 | buffer[2] = ~(data->bTag); | |
411 | buffer[3] = 0; /* Reserved */ | |
c2cd26e1 SH |
412 | buffer[4] = (this_part) & 255; |
413 | buffer[5] = ((this_part) >> 8) & 255; | |
414 | buffer[6] = ((this_part) >> 16) & 255; | |
415 | buffer[7] = ((this_part) >> 24) & 255; | |
5b775f67 GKH |
416 | buffer[8] = data->TermCharEnabled * 2; |
417 | /* Use term character? */ | |
418 | buffer[9] = data->TermChar; | |
419 | buffer[10] = 0; /* Reserved */ | |
420 | buffer[11] = 0; /* Reserved */ | |
421 | ||
422 | /* Send bulk URB */ | |
423 | retval = usb_bulk_msg(data->usb_dev, | |
424 | usb_sndbulkpipe(data->usb_dev, | |
425 | data->bulk_out), | |
426 | buffer, 12, &actual, USBTMC_TIMEOUT); | |
427 | ||
428 | /* Store bTag (in case we need to abort) */ | |
429 | data->bTag_last_write = data->bTag; | |
430 | ||
431 | /* Increment bTag -- and increment again if zero */ | |
432 | data->bTag++; | |
433 | if (!data->bTag) | |
434 | (data->bTag)++; | |
435 | ||
436 | if (retval < 0) { | |
437 | dev_err(dev, "usb_bulk_msg returned %d\n", retval); | |
438 | if (data->auto_abort) | |
439 | usbtmc_ioctl_abort_bulk_out(data); | |
440 | goto exit; | |
441 | } | |
442 | ||
443 | /* Send bulk URB */ | |
444 | retval = usb_bulk_msg(data->usb_dev, | |
445 | usb_rcvbulkpipe(data->usb_dev, | |
446 | data->bulk_in), | |
447 | buffer, USBTMC_SIZE_IOBUFFER, &actual, | |
448 | USBTMC_TIMEOUT); | |
449 | ||
450 | /* Store bTag (in case we need to abort) */ | |
451 | data->bTag_last_read = data->bTag; | |
452 | ||
453 | if (retval < 0) { | |
454 | dev_err(dev, "Unable to read data, error %d\n", retval); | |
455 | if (data->auto_abort) | |
456 | usbtmc_ioctl_abort_bulk_in(data); | |
457 | goto exit; | |
458 | } | |
459 | ||
460 | /* How many characters did the instrument send? */ | |
461 | n_characters = buffer[4] + | |
462 | (buffer[5] << 8) + | |
463 | (buffer[6] << 16) + | |
464 | (buffer[7] << 24); | |
465 | ||
665d7662 GS |
466 | /* Ensure the instrument doesn't lie about it */ |
467 | if(n_characters > actual - 12) { | |
a2fbf10e | 468 | dev_err(dev, "Device lies about message size: %u > %d\n", n_characters, actual - 12); |
665d7662 GS |
469 | n_characters = actual - 12; |
470 | } | |
471 | ||
472 | /* Ensure the instrument doesn't send more back than requested */ | |
473 | if(n_characters > this_part) { | |
474 | dev_err(dev, "Device returns more than requested: %zu > %zu\n", done + n_characters, done + this_part); | |
475 | n_characters = this_part; | |
476 | } | |
477 | ||
92d07e42 SH |
478 | /* Bound amount of data received by amount of data requested */ |
479 | if (n_characters > this_part) | |
480 | n_characters = this_part; | |
481 | ||
5b775f67 GKH |
482 | /* Copy buffer to user space */ |
483 | if (copy_to_user(buf + done, &buffer[12], n_characters)) { | |
484 | /* There must have been an addressing problem */ | |
485 | retval = -EFAULT; | |
486 | goto exit; | |
487 | } | |
488 | ||
489 | done += n_characters; | |
4143d178 SH |
490 | /* Terminate if end-of-message bit recieved from device */ |
491 | if ((buffer[8] & 0x01) && (actual >= n_characters + 12)) | |
5b775f67 | 492 | remaining = 0; |
665d7662 GS |
493 | else |
494 | remaining -= n_characters; | |
5b775f67 GKH |
495 | } |
496 | ||
497 | /* Update file position value */ | |
498 | *f_pos = *f_pos + done; | |
499 | retval = done; | |
500 | ||
501 | exit: | |
502 | mutex_unlock(&data->io_mutex); | |
503 | kfree(buffer); | |
504 | return retval; | |
505 | } | |
506 | ||
507 | static ssize_t usbtmc_write(struct file *filp, const char __user *buf, | |
508 | size_t count, loff_t *f_pos) | |
509 | { | |
510 | struct usbtmc_device_data *data; | |
511 | u8 *buffer; | |
512 | int retval; | |
513 | int actual; | |
514 | unsigned long int n_bytes; | |
5b775f67 GKH |
515 | int remaining; |
516 | int done; | |
517 | int this_part; | |
518 | ||
519 | data = filp->private_data; | |
520 | ||
521 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
522 | if (!buffer) | |
523 | return -ENOMEM; | |
524 | ||
525 | mutex_lock(&data->io_mutex); | |
86286883 ON |
526 | if (data->zombie) { |
527 | retval = -ENODEV; | |
528 | goto exit; | |
529 | } | |
5b775f67 GKH |
530 | |
531 | remaining = count; | |
532 | done = 0; | |
533 | ||
534 | while (remaining > 0) { | |
535 | if (remaining > USBTMC_SIZE_IOBUFFER - 12) { | |
536 | this_part = USBTMC_SIZE_IOBUFFER - 12; | |
537 | buffer[8] = 0; | |
538 | } else { | |
539 | this_part = remaining; | |
540 | buffer[8] = 1; | |
541 | } | |
542 | ||
543 | /* Setup IO buffer for DEV_DEP_MSG_OUT message */ | |
544 | buffer[0] = 1; | |
545 | buffer[1] = data->bTag; | |
546 | buffer[2] = ~(data->bTag); | |
547 | buffer[3] = 0; /* Reserved */ | |
548 | buffer[4] = this_part & 255; | |
549 | buffer[5] = (this_part >> 8) & 255; | |
550 | buffer[6] = (this_part >> 16) & 255; | |
551 | buffer[7] = (this_part >> 24) & 255; | |
552 | /* buffer[8] is set above... */ | |
553 | buffer[9] = 0; /* Reserved */ | |
554 | buffer[10] = 0; /* Reserved */ | |
555 | buffer[11] = 0; /* Reserved */ | |
556 | ||
557 | if (copy_from_user(&buffer[12], buf + done, this_part)) { | |
558 | retval = -EFAULT; | |
559 | goto exit; | |
560 | } | |
561 | ||
857cc4df IJ |
562 | n_bytes = roundup(12 + this_part, 4); |
563 | memset(buffer + 12 + this_part, 0, n_bytes - (12 + this_part)); | |
5b775f67 | 564 | |
ec412b92 AH |
565 | do { |
566 | retval = usb_bulk_msg(data->usb_dev, | |
567 | usb_sndbulkpipe(data->usb_dev, | |
568 | data->bulk_out), | |
569 | buffer, n_bytes, | |
570 | &actual, USBTMC_TIMEOUT); | |
571 | if (retval != 0) | |
572 | break; | |
573 | n_bytes -= actual; | |
574 | } while (n_bytes); | |
5b775f67 GKH |
575 | |
576 | data->bTag_last_write = data->bTag; | |
577 | data->bTag++; | |
578 | ||
579 | if (!data->bTag) | |
580 | data->bTag++; | |
581 | ||
582 | if (retval < 0) { | |
583 | dev_err(&data->intf->dev, | |
584 | "Unable to send data, error %d\n", retval); | |
585 | if (data->auto_abort) | |
586 | usbtmc_ioctl_abort_bulk_out(data); | |
587 | goto exit; | |
588 | } | |
589 | ||
590 | remaining -= this_part; | |
591 | done += this_part; | |
592 | } | |
593 | ||
594 | retval = count; | |
595 | exit: | |
596 | mutex_unlock(&data->io_mutex); | |
597 | kfree(buffer); | |
598 | return retval; | |
599 | } | |
600 | ||
601 | static int usbtmc_ioctl_clear(struct usbtmc_device_data *data) | |
602 | { | |
603 | struct usb_host_interface *current_setting; | |
604 | struct usb_endpoint_descriptor *desc; | |
605 | struct device *dev; | |
606 | u8 *buffer; | |
607 | int rv; | |
608 | int n; | |
609 | int actual; | |
610 | int max_size; | |
611 | ||
612 | dev = &data->intf->dev; | |
613 | ||
614 | dev_dbg(dev, "Sending INITIATE_CLEAR request\n"); | |
615 | ||
616 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
617 | if (!buffer) | |
618 | return -ENOMEM; | |
619 | ||
620 | rv = usb_control_msg(data->usb_dev, | |
621 | usb_rcvctrlpipe(data->usb_dev, 0), | |
622 | USBTMC_REQUEST_INITIATE_CLEAR, | |
623 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
624 | 0, 0, buffer, 1, USBTMC_TIMEOUT); | |
625 | if (rv < 0) { | |
626 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
627 | goto exit; | |
628 | } | |
629 | ||
630 | dev_dbg(dev, "INITIATE_CLEAR returned %x\n", buffer[0]); | |
631 | ||
632 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
633 | dev_err(dev, "INITIATE_CLEAR returned %x\n", buffer[0]); | |
634 | rv = -EPERM; | |
635 | goto exit; | |
636 | } | |
637 | ||
638 | max_size = 0; | |
639 | current_setting = data->intf->cur_altsetting; | |
640 | for (n = 0; n < current_setting->desc.bNumEndpoints; n++) { | |
641 | desc = ¤t_setting->endpoint[n].desc; | |
642 | if (desc->bEndpointAddress == data->bulk_in) | |
643 | max_size = le16_to_cpu(desc->wMaxPacketSize); | |
644 | } | |
645 | ||
646 | if (max_size == 0) { | |
647 | dev_err(dev, "Couldn't get wMaxPacketSize\n"); | |
648 | rv = -EPERM; | |
649 | goto exit; | |
650 | } | |
651 | ||
652 | dev_dbg(dev, "wMaxPacketSize is %d\n", max_size); | |
653 | ||
654 | n = 0; | |
655 | ||
656 | usbtmc_clear_check_status: | |
657 | ||
658 | dev_dbg(dev, "Sending CHECK_CLEAR_STATUS request\n"); | |
659 | ||
660 | rv = usb_control_msg(data->usb_dev, | |
661 | usb_rcvctrlpipe(data->usb_dev, 0), | |
662 | USBTMC_REQUEST_CHECK_CLEAR_STATUS, | |
663 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
664 | 0, 0, buffer, 2, USBTMC_TIMEOUT); | |
665 | if (rv < 0) { | |
666 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
667 | goto exit; | |
668 | } | |
669 | ||
670 | dev_dbg(dev, "CHECK_CLEAR_STATUS returned %x\n", buffer[0]); | |
671 | ||
672 | if (buffer[0] == USBTMC_STATUS_SUCCESS) | |
673 | goto usbtmc_clear_bulk_out_halt; | |
674 | ||
675 | if (buffer[0] != USBTMC_STATUS_PENDING) { | |
676 | dev_err(dev, "CHECK_CLEAR_STATUS returned %x\n", buffer[0]); | |
677 | rv = -EPERM; | |
678 | goto exit; | |
679 | } | |
680 | ||
681 | if (buffer[1] == 1) | |
682 | do { | |
683 | dev_dbg(dev, "Reading from bulk in EP\n"); | |
684 | ||
685 | rv = usb_bulk_msg(data->usb_dev, | |
686 | usb_rcvbulkpipe(data->usb_dev, | |
687 | data->bulk_in), | |
688 | buffer, USBTMC_SIZE_IOBUFFER, | |
689 | &actual, USBTMC_TIMEOUT); | |
690 | n++; | |
691 | ||
692 | if (rv < 0) { | |
693 | dev_err(dev, "usb_control_msg returned %d\n", | |
694 | rv); | |
695 | goto exit; | |
696 | } | |
697 | } while ((actual == max_size) && | |
698 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)); | |
699 | ||
700 | if (actual == max_size) { | |
701 | dev_err(dev, "Couldn't clear device buffer within %d cycles\n", | |
702 | USBTMC_MAX_READS_TO_CLEAR_BULK_IN); | |
703 | rv = -EPERM; | |
704 | goto exit; | |
705 | } | |
706 | ||
707 | goto usbtmc_clear_check_status; | |
708 | ||
709 | usbtmc_clear_bulk_out_halt: | |
710 | ||
711 | rv = usb_control_msg(data->usb_dev, | |
712 | usb_sndctrlpipe(data->usb_dev, 0), | |
713 | USB_REQ_CLEAR_FEATURE, | |
714 | USB_DIR_OUT | USB_TYPE_STANDARD | | |
715 | USB_RECIP_ENDPOINT, | |
716 | USB_ENDPOINT_HALT, | |
717 | data->bulk_out, buffer, 0, | |
718 | USBTMC_TIMEOUT); | |
719 | if (rv < 0) { | |
720 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
721 | goto exit; | |
722 | } | |
723 | rv = 0; | |
724 | ||
725 | exit: | |
726 | kfree(buffer); | |
727 | return rv; | |
728 | } | |
729 | ||
730 | static int usbtmc_ioctl_clear_out_halt(struct usbtmc_device_data *data) | |
731 | { | |
732 | u8 *buffer; | |
733 | int rv; | |
734 | ||
735 | buffer = kmalloc(2, GFP_KERNEL); | |
736 | if (!buffer) | |
737 | return -ENOMEM; | |
738 | ||
739 | rv = usb_control_msg(data->usb_dev, | |
740 | usb_sndctrlpipe(data->usb_dev, 0), | |
741 | USB_REQ_CLEAR_FEATURE, | |
742 | USB_DIR_OUT | USB_TYPE_STANDARD | | |
743 | USB_RECIP_ENDPOINT, | |
744 | USB_ENDPOINT_HALT, data->bulk_out, | |
745 | buffer, 0, USBTMC_TIMEOUT); | |
746 | ||
747 | if (rv < 0) { | |
748 | dev_err(&data->usb_dev->dev, "usb_control_msg returned %d\n", | |
749 | rv); | |
750 | goto exit; | |
751 | } | |
752 | rv = 0; | |
753 | ||
754 | exit: | |
755 | kfree(buffer); | |
756 | return rv; | |
757 | } | |
758 | ||
759 | static int usbtmc_ioctl_clear_in_halt(struct usbtmc_device_data *data) | |
760 | { | |
761 | u8 *buffer; | |
762 | int rv; | |
763 | ||
764 | buffer = kmalloc(2, GFP_KERNEL); | |
765 | if (!buffer) | |
766 | return -ENOMEM; | |
767 | ||
768 | rv = usb_control_msg(data->usb_dev, usb_sndctrlpipe(data->usb_dev, 0), | |
769 | USB_REQ_CLEAR_FEATURE, | |
770 | USB_DIR_OUT | USB_TYPE_STANDARD | | |
771 | USB_RECIP_ENDPOINT, | |
772 | USB_ENDPOINT_HALT, data->bulk_in, buffer, 0, | |
773 | USBTMC_TIMEOUT); | |
774 | ||
775 | if (rv < 0) { | |
776 | dev_err(&data->usb_dev->dev, "usb_control_msg returned %d\n", | |
777 | rv); | |
778 | goto exit; | |
779 | } | |
780 | rv = 0; | |
781 | ||
782 | exit: | |
783 | kfree(buffer); | |
784 | return rv; | |
785 | } | |
786 | ||
787 | static int get_capabilities(struct usbtmc_device_data *data) | |
788 | { | |
789 | struct device *dev = &data->usb_dev->dev; | |
790 | char *buffer; | |
ca157c4a | 791 | int rv = 0; |
5b775f67 GKH |
792 | |
793 | buffer = kmalloc(0x18, GFP_KERNEL); | |
794 | if (!buffer) | |
795 | return -ENOMEM; | |
796 | ||
797 | rv = usb_control_msg(data->usb_dev, usb_rcvctrlpipe(data->usb_dev, 0), | |
798 | USBTMC_REQUEST_GET_CAPABILITIES, | |
799 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
800 | 0, 0, buffer, 0x18, USBTMC_TIMEOUT); | |
801 | if (rv < 0) { | |
802 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
ca157c4a | 803 | goto err_out; |
5b775f67 GKH |
804 | } |
805 | ||
806 | dev_dbg(dev, "GET_CAPABILITIES returned %x\n", buffer[0]); | |
5b775f67 GKH |
807 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { |
808 | dev_err(dev, "GET_CAPABILITIES returned %x\n", buffer[0]); | |
ca157c4a ON |
809 | rv = -EPERM; |
810 | goto err_out; | |
5b775f67 | 811 | } |
d0a38365 GI |
812 | dev_dbg(dev, "Interface capabilities are %x\n", buffer[4]); |
813 | dev_dbg(dev, "Device capabilities are %x\n", buffer[5]); | |
814 | dev_dbg(dev, "USB488 interface capabilities are %x\n", buffer[14]); | |
815 | dev_dbg(dev, "USB488 device capabilities are %x\n", buffer[15]); | |
5b775f67 GKH |
816 | |
817 | data->capabilities.interface_capabilities = buffer[4]; | |
818 | data->capabilities.device_capabilities = buffer[5]; | |
819 | data->capabilities.usb488_interface_capabilities = buffer[14]; | |
820 | data->capabilities.usb488_device_capabilities = buffer[15]; | |
d0a38365 | 821 | rv = 0; |
5b775f67 | 822 | |
ca157c4a | 823 | err_out: |
5b775f67 | 824 | kfree(buffer); |
ca157c4a | 825 | return rv; |
5b775f67 GKH |
826 | } |
827 | ||
828 | #define capability_attribute(name) \ | |
829 | static ssize_t show_##name(struct device *dev, \ | |
830 | struct device_attribute *attr, char *buf) \ | |
831 | { \ | |
832 | struct usb_interface *intf = to_usb_interface(dev); \ | |
833 | struct usbtmc_device_data *data = usb_get_intfdata(intf); \ | |
834 | \ | |
835 | return sprintf(buf, "%d\n", data->capabilities.name); \ | |
836 | } \ | |
837 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) | |
838 | ||
839 | capability_attribute(interface_capabilities); | |
840 | capability_attribute(device_capabilities); | |
841 | capability_attribute(usb488_interface_capabilities); | |
842 | capability_attribute(usb488_device_capabilities); | |
843 | ||
844 | static struct attribute *capability_attrs[] = { | |
845 | &dev_attr_interface_capabilities.attr, | |
846 | &dev_attr_device_capabilities.attr, | |
847 | &dev_attr_usb488_interface_capabilities.attr, | |
848 | &dev_attr_usb488_device_capabilities.attr, | |
849 | NULL, | |
850 | }; | |
851 | ||
852 | static struct attribute_group capability_attr_grp = { | |
853 | .attrs = capability_attrs, | |
854 | }; | |
855 | ||
856 | static ssize_t show_TermChar(struct device *dev, | |
857 | struct device_attribute *attr, char *buf) | |
858 | { | |
859 | struct usb_interface *intf = to_usb_interface(dev); | |
860 | struct usbtmc_device_data *data = usb_get_intfdata(intf); | |
861 | ||
862 | return sprintf(buf, "%c\n", data->TermChar); | |
863 | } | |
864 | ||
865 | static ssize_t store_TermChar(struct device *dev, | |
866 | struct device_attribute *attr, | |
867 | const char *buf, size_t count) | |
868 | { | |
869 | struct usb_interface *intf = to_usb_interface(dev); | |
870 | struct usbtmc_device_data *data = usb_get_intfdata(intf); | |
871 | ||
872 | if (count < 1) | |
873 | return -EINVAL; | |
874 | data->TermChar = buf[0]; | |
875 | return count; | |
876 | } | |
877 | static DEVICE_ATTR(TermChar, S_IRUGO, show_TermChar, store_TermChar); | |
878 | ||
879 | #define data_attribute(name) \ | |
880 | static ssize_t show_##name(struct device *dev, \ | |
881 | struct device_attribute *attr, char *buf) \ | |
882 | { \ | |
883 | struct usb_interface *intf = to_usb_interface(dev); \ | |
884 | struct usbtmc_device_data *data = usb_get_intfdata(intf); \ | |
885 | \ | |
886 | return sprintf(buf, "%d\n", data->name); \ | |
887 | } \ | |
888 | static ssize_t store_##name(struct device *dev, \ | |
889 | struct device_attribute *attr, \ | |
890 | const char *buf, size_t count) \ | |
891 | { \ | |
892 | struct usb_interface *intf = to_usb_interface(dev); \ | |
893 | struct usbtmc_device_data *data = usb_get_intfdata(intf); \ | |
894 | ssize_t result; \ | |
895 | unsigned val; \ | |
896 | \ | |
897 | result = sscanf(buf, "%u\n", &val); \ | |
898 | if (result != 1) \ | |
899 | result = -EINVAL; \ | |
900 | data->name = val; \ | |
901 | if (result < 0) \ | |
902 | return result; \ | |
903 | else \ | |
904 | return count; \ | |
905 | } \ | |
906 | static DEVICE_ATTR(name, S_IRUGO, show_##name, store_##name) | |
907 | ||
908 | data_attribute(TermCharEnabled); | |
909 | data_attribute(auto_abort); | |
910 | ||
911 | static struct attribute *data_attrs[] = { | |
912 | &dev_attr_TermChar.attr, | |
913 | &dev_attr_TermCharEnabled.attr, | |
914 | &dev_attr_auto_abort.attr, | |
915 | NULL, | |
916 | }; | |
917 | ||
918 | static struct attribute_group data_attr_grp = { | |
919 | .attrs = data_attrs, | |
920 | }; | |
921 | ||
922 | static int usbtmc_ioctl_indicator_pulse(struct usbtmc_device_data *data) | |
923 | { | |
924 | struct device *dev; | |
925 | u8 *buffer; | |
926 | int rv; | |
927 | ||
928 | dev = &data->intf->dev; | |
929 | ||
930 | buffer = kmalloc(2, GFP_KERNEL); | |
931 | if (!buffer) | |
932 | return -ENOMEM; | |
933 | ||
934 | rv = usb_control_msg(data->usb_dev, | |
935 | usb_rcvctrlpipe(data->usb_dev, 0), | |
936 | USBTMC_REQUEST_INDICATOR_PULSE, | |
937 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
938 | 0, 0, buffer, 0x01, USBTMC_TIMEOUT); | |
939 | ||
940 | if (rv < 0) { | |
941 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
942 | goto exit; | |
943 | } | |
944 | ||
945 | dev_dbg(dev, "INDICATOR_PULSE returned %x\n", buffer[0]); | |
946 | ||
947 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
948 | dev_err(dev, "INDICATOR_PULSE returned %x\n", buffer[0]); | |
949 | rv = -EPERM; | |
950 | goto exit; | |
951 | } | |
952 | rv = 0; | |
953 | ||
954 | exit: | |
955 | kfree(buffer); | |
956 | return rv; | |
957 | } | |
958 | ||
959 | static long usbtmc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
960 | { | |
961 | struct usbtmc_device_data *data; | |
962 | int retval = -EBADRQC; | |
963 | ||
964 | data = file->private_data; | |
965 | mutex_lock(&data->io_mutex); | |
86286883 ON |
966 | if (data->zombie) { |
967 | retval = -ENODEV; | |
968 | goto skip_io_on_zombie; | |
969 | } | |
5b775f67 GKH |
970 | |
971 | switch (cmd) { | |
972 | case USBTMC_IOCTL_CLEAR_OUT_HALT: | |
973 | retval = usbtmc_ioctl_clear_out_halt(data); | |
a92b63e7 | 974 | break; |
5b775f67 GKH |
975 | |
976 | case USBTMC_IOCTL_CLEAR_IN_HALT: | |
977 | retval = usbtmc_ioctl_clear_in_halt(data); | |
a92b63e7 | 978 | break; |
5b775f67 GKH |
979 | |
980 | case USBTMC_IOCTL_INDICATOR_PULSE: | |
981 | retval = usbtmc_ioctl_indicator_pulse(data); | |
a92b63e7 | 982 | break; |
5b775f67 GKH |
983 | |
984 | case USBTMC_IOCTL_CLEAR: | |
985 | retval = usbtmc_ioctl_clear(data); | |
a92b63e7 | 986 | break; |
5b775f67 GKH |
987 | |
988 | case USBTMC_IOCTL_ABORT_BULK_OUT: | |
989 | retval = usbtmc_ioctl_abort_bulk_out(data); | |
a92b63e7 | 990 | break; |
5b775f67 GKH |
991 | |
992 | case USBTMC_IOCTL_ABORT_BULK_IN: | |
993 | retval = usbtmc_ioctl_abort_bulk_in(data); | |
a92b63e7 | 994 | break; |
5b775f67 GKH |
995 | } |
996 | ||
86286883 | 997 | skip_io_on_zombie: |
5b775f67 GKH |
998 | mutex_unlock(&data->io_mutex); |
999 | return retval; | |
1000 | } | |
1001 | ||
828c0950 | 1002 | static const struct file_operations fops = { |
5b775f67 GKH |
1003 | .owner = THIS_MODULE, |
1004 | .read = usbtmc_read, | |
1005 | .write = usbtmc_write, | |
1006 | .open = usbtmc_open, | |
1007 | .release = usbtmc_release, | |
1008 | .unlocked_ioctl = usbtmc_ioctl, | |
1009 | }; | |
1010 | ||
1011 | static struct usb_class_driver usbtmc_class = { | |
1012 | .name = "usbtmc%d", | |
1013 | .fops = &fops, | |
1014 | .minor_base = USBTMC_MINOR_BASE, | |
1015 | }; | |
1016 | ||
1017 | ||
1018 | static int usbtmc_probe(struct usb_interface *intf, | |
1019 | const struct usb_device_id *id) | |
1020 | { | |
1021 | struct usbtmc_device_data *data; | |
1022 | struct usb_host_interface *iface_desc; | |
1023 | struct usb_endpoint_descriptor *endpoint; | |
1024 | int n; | |
1025 | int retcode; | |
1026 | ||
1027 | dev_dbg(&intf->dev, "%s called\n", __func__); | |
1028 | ||
1029 | data = kmalloc(sizeof(struct usbtmc_device_data), GFP_KERNEL); | |
1030 | if (!data) { | |
1031 | dev_err(&intf->dev, "Unable to allocate kernel memory\n"); | |
1032 | return -ENOMEM; | |
1033 | } | |
1034 | ||
1035 | data->intf = intf; | |
1036 | data->id = id; | |
1037 | data->usb_dev = usb_get_dev(interface_to_usbdev(intf)); | |
1038 | usb_set_intfdata(intf, data); | |
1039 | kref_init(&data->kref); | |
1040 | mutex_init(&data->io_mutex); | |
86286883 | 1041 | data->zombie = 0; |
5b775f67 GKH |
1042 | |
1043 | /* Initialize USBTMC bTag and other fields */ | |
1044 | data->bTag = 1; | |
1045 | data->TermCharEnabled = 0; | |
1046 | data->TermChar = '\n'; | |
1047 | ||
1048 | /* USBTMC devices have only one setting, so use that */ | |
1049 | iface_desc = data->intf->cur_altsetting; | |
1050 | ||
1051 | /* Find bulk in endpoint */ | |
1052 | for (n = 0; n < iface_desc->desc.bNumEndpoints; n++) { | |
1053 | endpoint = &iface_desc->endpoint[n].desc; | |
1054 | ||
1055 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1056 | data->bulk_in = endpoint->bEndpointAddress; | |
1057 | dev_dbg(&intf->dev, "Found bulk in endpoint at %u\n", | |
1058 | data->bulk_in); | |
1059 | break; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* Find bulk out endpoint */ | |
1064 | for (n = 0; n < iface_desc->desc.bNumEndpoints; n++) { | |
1065 | endpoint = &iface_desc->endpoint[n].desc; | |
1066 | ||
1067 | if (usb_endpoint_is_bulk_out(endpoint)) { | |
1068 | data->bulk_out = endpoint->bEndpointAddress; | |
1069 | dev_dbg(&intf->dev, "Found Bulk out endpoint at %u\n", | |
1070 | data->bulk_out); | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | retcode = get_capabilities(data); | |
1076 | if (retcode) | |
1077 | dev_err(&intf->dev, "can't read capabilities\n"); | |
1078 | else | |
1079 | retcode = sysfs_create_group(&intf->dev.kobj, | |
1080 | &capability_attr_grp); | |
1081 | ||
1082 | retcode = sysfs_create_group(&intf->dev.kobj, &data_attr_grp); | |
1083 | ||
1084 | retcode = usb_register_dev(intf, &usbtmc_class); | |
1085 | if (retcode) { | |
1086 | dev_err(&intf->dev, "Not able to get a minor" | |
1087 | " (base %u, slice default): %d\n", USBTMC_MINOR_BASE, | |
1088 | retcode); | |
1089 | goto error_register; | |
1090 | } | |
1091 | dev_dbg(&intf->dev, "Using minor number %d\n", intf->minor); | |
1092 | ||
1093 | return 0; | |
1094 | ||
1095 | error_register: | |
1096 | sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp); | |
1097 | sysfs_remove_group(&intf->dev.kobj, &data_attr_grp); | |
1098 | kref_put(&data->kref, usbtmc_delete); | |
1099 | return retcode; | |
1100 | } | |
1101 | ||
1102 | static void usbtmc_disconnect(struct usb_interface *intf) | |
1103 | { | |
1104 | struct usbtmc_device_data *data; | |
1105 | ||
1106 | dev_dbg(&intf->dev, "usbtmc_disconnect called\n"); | |
1107 | ||
1108 | data = usb_get_intfdata(intf); | |
1109 | usb_deregister_dev(intf, &usbtmc_class); | |
1110 | sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp); | |
1111 | sysfs_remove_group(&intf->dev.kobj, &data_attr_grp); | |
86286883 ON |
1112 | mutex_lock(&data->io_mutex); |
1113 | data->zombie = 1; | |
1114 | mutex_unlock(&data->io_mutex); | |
5b775f67 GKH |
1115 | kref_put(&data->kref, usbtmc_delete); |
1116 | } | |
1117 | ||
dca8cd04 | 1118 | static int usbtmc_suspend(struct usb_interface *intf, pm_message_t message) |
a4708103 ON |
1119 | { |
1120 | /* this driver does not have pending URBs */ | |
1121 | return 0; | |
1122 | } | |
1123 | ||
dca8cd04 | 1124 | static int usbtmc_resume(struct usb_interface *intf) |
a4708103 ON |
1125 | { |
1126 | return 0; | |
1127 | } | |
1128 | ||
5b775f67 GKH |
1129 | static struct usb_driver usbtmc_driver = { |
1130 | .name = "usbtmc", | |
1131 | .id_table = usbtmc_devices, | |
1132 | .probe = usbtmc_probe, | |
a4708103 ON |
1133 | .disconnect = usbtmc_disconnect, |
1134 | .suspend = usbtmc_suspend, | |
1135 | .resume = usbtmc_resume, | |
5b775f67 GKH |
1136 | }; |
1137 | ||
1138 | static int __init usbtmc_init(void) | |
1139 | { | |
1140 | int retcode; | |
1141 | ||
1142 | retcode = usb_register(&usbtmc_driver); | |
1143 | if (retcode) | |
1144 | printk(KERN_ERR KBUILD_MODNAME": Unable to register driver\n"); | |
1145 | return retcode; | |
1146 | } | |
1147 | module_init(usbtmc_init); | |
1148 | ||
1149 | static void __exit usbtmc_exit(void) | |
1150 | { | |
1151 | usb_deregister(&usbtmc_driver); | |
1152 | } | |
1153 | module_exit(usbtmc_exit); | |
1154 | ||
1155 | MODULE_LICENSE("GPL"); |