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 | ||
f4d844cb AS |
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
23 | ||
5b775f67 | 24 | #include <linux/module.h> |
857cc4df | 25 | #include <linux/kernel.h> |
5b775f67 GKH |
26 | #include <linux/fs.h> |
27 | #include <linux/uaccess.h> | |
28 | #include <linux/kref.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
5b775f67 GKH |
30 | #include <linux/mutex.h> |
31 | #include <linux/usb.h> | |
32 | #include <linux/usb/tmc.h> | |
33 | ||
34 | ||
8402db5d APF |
35 | #define RIGOL 1 |
36 | #define USBTMC_HEADER_SIZE 12 | |
5b775f67 GKH |
37 | #define USBTMC_MINOR_BASE 176 |
38 | ||
39 | /* | |
40 | * Size of driver internal IO buffer. Must be multiple of 4 and at least as | |
41 | * large as wMaxPacketSize (which is usually 512 bytes). | |
42 | */ | |
43 | #define USBTMC_SIZE_IOBUFFER 2048 | |
44 | ||
45 | /* Default USB timeout (in milliseconds) */ | |
35f76e89 | 46 | #define USBTMC_TIMEOUT 5000 |
5b775f67 GKH |
47 | |
48 | /* | |
49 | * Maximum number of read cycles to empty bulk in endpoint during CLEAR and | |
50 | * ABORT_BULK_IN requests. Ends the loop if (for whatever reason) a short | |
51 | * packet is never read. | |
52 | */ | |
53 | #define USBTMC_MAX_READS_TO_CLEAR_BULK_IN 100 | |
54 | ||
6ef4852b | 55 | static const struct usb_device_id usbtmc_devices[] = { |
5b775f67 | 56 | { USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 0), }, |
228dd05d | 57 | { USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, 3, 1), }, |
5b775f67 GKH |
58 | { 0, } /* terminating entry */ |
59 | }; | |
5413aa46 | 60 | MODULE_DEVICE_TABLE(usb, usbtmc_devices); |
5b775f67 GKH |
61 | |
62 | /* | |
63 | * This structure is the capabilities for the device | |
d0a38365 GI |
64 | * See section 4.2.1.8 of the USBTMC specification, |
65 | * and section 4.2.2 of the USBTMC usb488 subclass | |
66 | * specification for details. | |
5b775f67 GKH |
67 | */ |
68 | struct usbtmc_dev_capabilities { | |
69 | __u8 interface_capabilities; | |
70 | __u8 device_capabilities; | |
71 | __u8 usb488_interface_capabilities; | |
72 | __u8 usb488_device_capabilities; | |
73 | }; | |
74 | ||
75 | /* This structure holds private data for each USBTMC device. One copy is | |
76 | * allocated for each USBTMC device in the driver's probe function. | |
77 | */ | |
78 | struct usbtmc_device_data { | |
79 | const struct usb_device_id *id; | |
80 | struct usb_device *usb_dev; | |
81 | struct usb_interface *intf; | |
82 | ||
83 | unsigned int bulk_in; | |
84 | unsigned int bulk_out; | |
85 | ||
86 | u8 bTag; | |
87 | u8 bTag_last_write; /* needed for abort */ | |
88 | u8 bTag_last_read; /* needed for abort */ | |
89 | ||
8402db5d APF |
90 | u8 rigol_quirk; |
91 | ||
5b775f67 GKH |
92 | /* attributes from the USB TMC spec for this device */ |
93 | u8 TermChar; | |
94 | bool TermCharEnabled; | |
95 | bool auto_abort; | |
96 | ||
86286883 ON |
97 | bool zombie; /* fd of disconnected device */ |
98 | ||
5b775f67 GKH |
99 | struct usbtmc_dev_capabilities capabilities; |
100 | struct kref kref; | |
101 | struct mutex io_mutex; /* only one i/o function running at a time */ | |
102 | }; | |
103 | #define to_usbtmc_data(d) container_of(d, struct usbtmc_device_data, kref) | |
104 | ||
8402db5d APF |
105 | struct usbtmc_ID_rigol_quirk { |
106 | __u16 idVendor; | |
107 | __u16 idProduct; | |
108 | }; | |
109 | ||
110 | static const struct usbtmc_ID_rigol_quirk usbtmc_id_quirk[] = { | |
111 | { 0x1ab1, 0x0588 }, | |
112 | { 0, 0 } | |
113 | }; | |
114 | ||
5b775f67 GKH |
115 | /* Forward declarations */ |
116 | static struct usb_driver usbtmc_driver; | |
117 | ||
118 | static void usbtmc_delete(struct kref *kref) | |
119 | { | |
120 | struct usbtmc_device_data *data = to_usbtmc_data(kref); | |
121 | ||
122 | usb_put_dev(data->usb_dev); | |
5b775f67 GKH |
123 | } |
124 | ||
125 | static int usbtmc_open(struct inode *inode, struct file *filp) | |
126 | { | |
127 | struct usb_interface *intf; | |
128 | struct usbtmc_device_data *data; | |
5b10916e | 129 | int retval = 0; |
5b775f67 GKH |
130 | |
131 | intf = usb_find_interface(&usbtmc_driver, iminor(inode)); | |
132 | if (!intf) { | |
f4d844cb AS |
133 | pr_err("can not find device for minor %d", iminor(inode)); |
134 | return -ENODEV; | |
5b775f67 GKH |
135 | } |
136 | ||
137 | data = usb_get_intfdata(intf); | |
138 | kref_get(&data->kref); | |
139 | ||
140 | /* Store pointer in file structure's private data field */ | |
141 | filp->private_data = data; | |
142 | ||
5b775f67 GKH |
143 | return retval; |
144 | } | |
145 | ||
146 | static int usbtmc_release(struct inode *inode, struct file *file) | |
147 | { | |
148 | struct usbtmc_device_data *data = file->private_data; | |
149 | ||
150 | kref_put(&data->kref, usbtmc_delete); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int usbtmc_ioctl_abort_bulk_in(struct usbtmc_device_data *data) | |
155 | { | |
b361a6e3 | 156 | u8 *buffer; |
5b775f67 GKH |
157 | struct device *dev; |
158 | int rv; | |
159 | int n; | |
160 | int actual; | |
161 | struct usb_host_interface *current_setting; | |
162 | int max_size; | |
163 | ||
164 | dev = &data->intf->dev; | |
165 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
166 | if (!buffer) | |
167 | return -ENOMEM; | |
168 | ||
169 | rv = usb_control_msg(data->usb_dev, | |
170 | usb_rcvctrlpipe(data->usb_dev, 0), | |
171 | USBTMC_REQUEST_INITIATE_ABORT_BULK_IN, | |
172 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
173 | data->bTag_last_read, data->bulk_in, | |
174 | buffer, 2, USBTMC_TIMEOUT); | |
175 | ||
176 | if (rv < 0) { | |
177 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
178 | goto exit; | |
179 | } | |
180 | ||
181 | dev_dbg(dev, "INITIATE_ABORT_BULK_IN returned %x\n", buffer[0]); | |
182 | ||
183 | if (buffer[0] == USBTMC_STATUS_FAILED) { | |
184 | rv = 0; | |
185 | goto exit; | |
186 | } | |
187 | ||
188 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
189 | dev_err(dev, "INITIATE_ABORT_BULK_IN returned %x\n", | |
190 | buffer[0]); | |
191 | rv = -EPERM; | |
192 | goto exit; | |
193 | } | |
194 | ||
195 | max_size = 0; | |
196 | current_setting = data->intf->cur_altsetting; | |
197 | for (n = 0; n < current_setting->desc.bNumEndpoints; n++) | |
198 | if (current_setting->endpoint[n].desc.bEndpointAddress == | |
199 | data->bulk_in) | |
29cc8897 | 200 | max_size = usb_endpoint_maxp(¤t_setting->endpoint[n].desc); |
5b775f67 GKH |
201 | |
202 | if (max_size == 0) { | |
203 | dev_err(dev, "Couldn't get wMaxPacketSize\n"); | |
204 | rv = -EPERM; | |
205 | goto exit; | |
206 | } | |
207 | ||
208 | dev_dbg(&data->intf->dev, "wMaxPacketSize is %d\n", max_size); | |
209 | ||
210 | n = 0; | |
211 | ||
212 | do { | |
213 | dev_dbg(dev, "Reading from bulk in EP\n"); | |
214 | ||
215 | rv = usb_bulk_msg(data->usb_dev, | |
216 | usb_rcvbulkpipe(data->usb_dev, | |
217 | data->bulk_in), | |
218 | buffer, USBTMC_SIZE_IOBUFFER, | |
219 | &actual, USBTMC_TIMEOUT); | |
220 | ||
221 | n++; | |
222 | ||
223 | if (rv < 0) { | |
224 | dev_err(dev, "usb_bulk_msg returned %d\n", rv); | |
225 | goto exit; | |
226 | } | |
227 | } while ((actual == max_size) && | |
228 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)); | |
229 | ||
230 | if (actual == max_size) { | |
231 | dev_err(dev, "Couldn't clear device buffer within %d cycles\n", | |
232 | USBTMC_MAX_READS_TO_CLEAR_BULK_IN); | |
233 | rv = -EPERM; | |
234 | goto exit; | |
235 | } | |
236 | ||
237 | n = 0; | |
238 | ||
239 | usbtmc_abort_bulk_in_status: | |
240 | rv = usb_control_msg(data->usb_dev, | |
241 | usb_rcvctrlpipe(data->usb_dev, 0), | |
242 | USBTMC_REQUEST_CHECK_ABORT_BULK_IN_STATUS, | |
243 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
244 | 0, data->bulk_in, buffer, 0x08, | |
245 | USBTMC_TIMEOUT); | |
246 | ||
247 | if (rv < 0) { | |
248 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
249 | goto exit; | |
250 | } | |
251 | ||
252 | dev_dbg(dev, "INITIATE_ABORT_BULK_IN returned %x\n", buffer[0]); | |
253 | ||
254 | if (buffer[0] == USBTMC_STATUS_SUCCESS) { | |
255 | rv = 0; | |
256 | goto exit; | |
257 | } | |
258 | ||
259 | if (buffer[0] != USBTMC_STATUS_PENDING) { | |
260 | dev_err(dev, "INITIATE_ABORT_BULK_IN returned %x\n", buffer[0]); | |
261 | rv = -EPERM; | |
262 | goto exit; | |
263 | } | |
264 | ||
265 | if (buffer[1] == 1) | |
266 | do { | |
267 | dev_dbg(dev, "Reading from bulk in EP\n"); | |
268 | ||
269 | rv = usb_bulk_msg(data->usb_dev, | |
270 | usb_rcvbulkpipe(data->usb_dev, | |
271 | data->bulk_in), | |
272 | buffer, USBTMC_SIZE_IOBUFFER, | |
273 | &actual, USBTMC_TIMEOUT); | |
274 | ||
275 | n++; | |
276 | ||
277 | if (rv < 0) { | |
278 | dev_err(dev, "usb_bulk_msg returned %d\n", rv); | |
279 | goto exit; | |
280 | } | |
4f1a7a3e | 281 | } while ((actual == max_size) && |
5b775f67 GKH |
282 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)); |
283 | ||
284 | if (actual == max_size) { | |
285 | dev_err(dev, "Couldn't clear device buffer within %d cycles\n", | |
286 | USBTMC_MAX_READS_TO_CLEAR_BULK_IN); | |
287 | rv = -EPERM; | |
288 | goto exit; | |
289 | } | |
290 | ||
291 | goto usbtmc_abort_bulk_in_status; | |
292 | ||
293 | exit: | |
294 | kfree(buffer); | |
295 | return rv; | |
296 | ||
297 | } | |
298 | ||
299 | static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data) | |
300 | { | |
301 | struct device *dev; | |
302 | u8 *buffer; | |
303 | int rv; | |
304 | int n; | |
305 | ||
306 | dev = &data->intf->dev; | |
307 | ||
308 | buffer = kmalloc(8, GFP_KERNEL); | |
309 | if (!buffer) | |
310 | return -ENOMEM; | |
311 | ||
312 | rv = usb_control_msg(data->usb_dev, | |
313 | usb_rcvctrlpipe(data->usb_dev, 0), | |
314 | USBTMC_REQUEST_INITIATE_ABORT_BULK_OUT, | |
315 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
316 | data->bTag_last_write, data->bulk_out, | |
317 | buffer, 2, USBTMC_TIMEOUT); | |
318 | ||
319 | if (rv < 0) { | |
320 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
321 | goto exit; | |
322 | } | |
323 | ||
324 | dev_dbg(dev, "INITIATE_ABORT_BULK_OUT returned %x\n", buffer[0]); | |
325 | ||
326 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
327 | dev_err(dev, "INITIATE_ABORT_BULK_OUT returned %x\n", | |
328 | buffer[0]); | |
329 | rv = -EPERM; | |
330 | goto exit; | |
331 | } | |
332 | ||
333 | n = 0; | |
334 | ||
335 | usbtmc_abort_bulk_out_check_status: | |
336 | rv = usb_control_msg(data->usb_dev, | |
337 | usb_rcvctrlpipe(data->usb_dev, 0), | |
338 | USBTMC_REQUEST_CHECK_ABORT_BULK_OUT_STATUS, | |
339 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT, | |
340 | 0, data->bulk_out, buffer, 0x08, | |
341 | USBTMC_TIMEOUT); | |
342 | n++; | |
343 | if (rv < 0) { | |
344 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
345 | goto exit; | |
346 | } | |
347 | ||
348 | dev_dbg(dev, "CHECK_ABORT_BULK_OUT returned %x\n", buffer[0]); | |
349 | ||
350 | if (buffer[0] == USBTMC_STATUS_SUCCESS) | |
351 | goto usbtmc_abort_bulk_out_clear_halt; | |
352 | ||
353 | if ((buffer[0] == USBTMC_STATUS_PENDING) && | |
354 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)) | |
355 | goto usbtmc_abort_bulk_out_check_status; | |
356 | ||
357 | rv = -EPERM; | |
358 | goto exit; | |
359 | ||
360 | usbtmc_abort_bulk_out_clear_halt: | |
3342ecda SS |
361 | rv = usb_clear_halt(data->usb_dev, |
362 | usb_sndbulkpipe(data->usb_dev, data->bulk_out)); | |
5b775f67 GKH |
363 | |
364 | if (rv < 0) { | |
365 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
366 | goto exit; | |
367 | } | |
368 | rv = 0; | |
369 | ||
370 | exit: | |
371 | kfree(buffer); | |
372 | return rv; | |
373 | } | |
374 | ||
88d9b2b3 APF |
375 | /* |
376 | * Sends a REQUEST_DEV_DEP_MSG_IN message on the Bulk-IN endpoint. | |
377 | * @transfer_size: number of bytes to request from the device. | |
378 | * | |
379 | * See the USBTMC specification, Table 4. | |
380 | * | |
381 | * Also updates bTag_last_write. | |
382 | */ | |
383 | static int send_request_dev_dep_msg_in(struct usbtmc_device_data *data, size_t transfer_size) | |
384 | { | |
385 | int retval; | |
d846b765 | 386 | u8 *buffer; |
88d9b2b3 APF |
387 | int actual; |
388 | ||
d846b765 ON |
389 | buffer = kmalloc(USBTMC_HEADER_SIZE, GFP_KERNEL); |
390 | if (!buffer) | |
391 | return -ENOMEM; | |
88d9b2b3 APF |
392 | /* Setup IO buffer for REQUEST_DEV_DEP_MSG_IN message |
393 | * Refer to class specs for details | |
394 | */ | |
395 | buffer[0] = 2; | |
396 | buffer[1] = data->bTag; | |
bbf4976e | 397 | buffer[2] = ~data->bTag; |
88d9b2b3 | 398 | buffer[3] = 0; /* Reserved */ |
bbf4976e AS |
399 | buffer[4] = transfer_size >> 0; |
400 | buffer[5] = transfer_size >> 8; | |
401 | buffer[6] = transfer_size >> 16; | |
402 | buffer[7] = transfer_size >> 24; | |
88d9b2b3 APF |
403 | buffer[8] = data->TermCharEnabled * 2; |
404 | /* Use term character? */ | |
405 | buffer[9] = data->TermChar; | |
406 | buffer[10] = 0; /* Reserved */ | |
407 | buffer[11] = 0; /* Reserved */ | |
408 | ||
409 | /* Send bulk URB */ | |
410 | retval = usb_bulk_msg(data->usb_dev, | |
411 | usb_sndbulkpipe(data->usb_dev, | |
412 | data->bulk_out), | |
413 | buffer, USBTMC_HEADER_SIZE, &actual, USBTMC_TIMEOUT); | |
414 | ||
415 | /* Store bTag (in case we need to abort) */ | |
416 | data->bTag_last_write = data->bTag; | |
417 | ||
418 | /* Increment bTag -- and increment again if zero */ | |
419 | data->bTag++; | |
420 | if (!data->bTag) | |
bbf4976e | 421 | data->bTag++; |
88d9b2b3 | 422 | |
d846b765 | 423 | kfree(buffer); |
88d9b2b3 APF |
424 | if (retval < 0) { |
425 | dev_err(&data->intf->dev, "usb_bulk_msg in send_request_dev_dep_msg_in() returned %d\n", retval); | |
426 | return retval; | |
427 | } | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
5b775f67 GKH |
432 | static ssize_t usbtmc_read(struct file *filp, char __user *buf, |
433 | size_t count, loff_t *f_pos) | |
434 | { | |
435 | struct usbtmc_device_data *data; | |
436 | struct device *dev; | |
665d7662 | 437 | u32 n_characters; |
5b775f67 GKH |
438 | u8 *buffer; |
439 | int actual; | |
665d7662 GS |
440 | size_t done; |
441 | size_t remaining; | |
5b775f67 | 442 | int retval; |
665d7662 | 443 | size_t this_part; |
5b775f67 GKH |
444 | |
445 | /* Get pointer to private data structure */ | |
446 | data = filp->private_data; | |
447 | dev = &data->intf->dev; | |
448 | ||
449 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
450 | if (!buffer) | |
451 | return -ENOMEM; | |
452 | ||
453 | mutex_lock(&data->io_mutex); | |
86286883 ON |
454 | if (data->zombie) { |
455 | retval = -ENODEV; | |
456 | goto exit; | |
457 | } | |
5b775f67 | 458 | |
d2ddce37 APF |
459 | if (data->rigol_quirk) { |
460 | dev_dbg(dev, "usb_bulk_msg_in: count(%zu)\n", count); | |
461 | ||
462 | retval = send_request_dev_dep_msg_in(data, count); | |
463 | ||
464 | if (retval < 0) { | |
465 | if (data->auto_abort) | |
466 | usbtmc_ioctl_abort_bulk_out(data); | |
467 | goto exit; | |
468 | } | |
469 | } | |
470 | ||
471 | /* Loop until we have fetched everything we requested */ | |
5b775f67 | 472 | remaining = count; |
d2ddce37 | 473 | this_part = remaining; |
5b775f67 GKH |
474 | done = 0; |
475 | ||
476 | while (remaining > 0) { | |
bbf4976e | 477 | if (!data->rigol_quirk) { |
d2ddce37 APF |
478 | dev_dbg(dev, "usb_bulk_msg_in: remaining(%zu), count(%zu)\n", remaining, count); |
479 | ||
480 | if (remaining > USBTMC_SIZE_IOBUFFER - USBTMC_HEADER_SIZE - 3) | |
481 | this_part = USBTMC_SIZE_IOBUFFER - USBTMC_HEADER_SIZE - 3; | |
482 | else | |
483 | this_part = remaining; | |
5b775f67 | 484 | |
88d9b2b3 | 485 | retval = send_request_dev_dep_msg_in(data, this_part); |
d2ddce37 | 486 | if (retval < 0) { |
5b775f67 | 487 | dev_err(dev, "usb_bulk_msg returned %d\n", retval); |
d2ddce37 APF |
488 | if (data->auto_abort) |
489 | usbtmc_ioctl_abort_bulk_out(data); | |
490 | goto exit; | |
491 | } | |
5b775f67 GKH |
492 | } |
493 | ||
494 | /* Send bulk URB */ | |
495 | retval = usb_bulk_msg(data->usb_dev, | |
496 | usb_rcvbulkpipe(data->usb_dev, | |
497 | data->bulk_in), | |
498 | buffer, USBTMC_SIZE_IOBUFFER, &actual, | |
499 | USBTMC_TIMEOUT); | |
500 | ||
d2ddce37 APF |
501 | dev_dbg(dev, "usb_bulk_msg: retval(%u), done(%zu), remaining(%zu), actual(%d)\n", retval, done, remaining, actual); |
502 | ||
5b775f67 GKH |
503 | /* Store bTag (in case we need to abort) */ |
504 | data->bTag_last_read = data->bTag; | |
505 | ||
506 | if (retval < 0) { | |
d2ddce37 | 507 | dev_dbg(dev, "Unable to read data, error %d\n", retval); |
5b775f67 GKH |
508 | if (data->auto_abort) |
509 | usbtmc_ioctl_abort_bulk_in(data); | |
510 | goto exit; | |
511 | } | |
512 | ||
d2ddce37 | 513 | /* Parse header in first packet */ |
bbf4976e | 514 | if ((done == 0) || !data->rigol_quirk) { |
d2ddce37 APF |
515 | /* Sanity checks for the header */ |
516 | if (actual < USBTMC_HEADER_SIZE) { | |
517 | dev_err(dev, "Device sent too small first packet: %u < %u\n", actual, USBTMC_HEADER_SIZE); | |
518 | if (data->auto_abort) | |
519 | usbtmc_ioctl_abort_bulk_in(data); | |
520 | goto exit; | |
521 | } | |
5b775f67 | 522 | |
d2ddce37 APF |
523 | if (buffer[0] != 2) { |
524 | dev_err(dev, "Device sent reply with wrong MsgID: %u != 2\n", buffer[0]); | |
525 | if (data->auto_abort) | |
526 | usbtmc_ioctl_abort_bulk_in(data); | |
527 | goto exit; | |
528 | } | |
665d7662 | 529 | |
d2ddce37 APF |
530 | if (buffer[1] != data->bTag_last_write) { |
531 | dev_err(dev, "Device sent reply with wrong bTag: %u != %u\n", buffer[1], data->bTag_last_write); | |
532 | if (data->auto_abort) | |
533 | usbtmc_ioctl_abort_bulk_in(data); | |
534 | goto exit; | |
535 | } | |
665d7662 | 536 | |
d2ddce37 APF |
537 | /* How many characters did the instrument send? */ |
538 | n_characters = buffer[4] + | |
539 | (buffer[5] << 8) + | |
540 | (buffer[6] << 16) + | |
541 | (buffer[7] << 24); | |
92d07e42 | 542 | |
d2ddce37 APF |
543 | if (n_characters > this_part) { |
544 | dev_err(dev, "Device wants to return more data than requested: %u > %zu\n", n_characters, count); | |
545 | if (data->auto_abort) | |
546 | usbtmc_ioctl_abort_bulk_in(data); | |
547 | goto exit; | |
548 | } | |
549 | ||
550 | /* Remove the USBTMC header */ | |
551 | actual -= USBTMC_HEADER_SIZE; | |
552 | ||
553 | /* Check if the message is smaller than requested */ | |
554 | if (data->rigol_quirk) { | |
555 | if (remaining > n_characters) | |
556 | remaining = n_characters; | |
557 | /* Remove padding if it exists */ | |
92f78ddb | 558 | if (actual > remaining) |
d2ddce37 APF |
559 | actual = remaining; |
560 | } | |
561 | else { | |
562 | if (this_part > n_characters) | |
563 | this_part = n_characters; | |
564 | /* Remove padding if it exists */ | |
92f78ddb | 565 | if (actual > this_part) |
d2ddce37 APF |
566 | actual = this_part; |
567 | } | |
568 | ||
569 | dev_dbg(dev, "Bulk-IN header: N_characters(%u), bTransAttr(%u)\n", n_characters, buffer[8]); | |
570 | ||
571 | remaining -= actual; | |
572 | ||
573 | /* Terminate if end-of-message bit received from device */ | |
bbf4976e | 574 | if ((buffer[8] & 0x01) && (actual >= n_characters)) |
d2ddce37 APF |
575 | remaining = 0; |
576 | ||
577 | dev_dbg(dev, "Bulk-IN header: remaining(%zu), buf(%p), buffer(%p) done(%zu)\n", remaining,buf,buffer,done); | |
578 | ||
579 | ||
580 | /* Copy buffer to user space */ | |
581 | if (copy_to_user(buf + done, &buffer[USBTMC_HEADER_SIZE], actual)) { | |
582 | /* There must have been an addressing problem */ | |
583 | retval = -EFAULT; | |
584 | goto exit; | |
585 | } | |
586 | done += actual; | |
5b775f67 | 587 | } |
d2ddce37 | 588 | else { |
92f78ddb | 589 | if (actual > remaining) |
d2ddce37 | 590 | actual = remaining; |
5b775f67 | 591 | |
d2ddce37 APF |
592 | remaining -= actual; |
593 | ||
594 | dev_dbg(dev, "Bulk-IN header cont: actual(%u), done(%zu), remaining(%zu), buf(%p), buffer(%p)\n", actual, done, remaining,buf,buffer); | |
595 | ||
596 | /* Copy buffer to user space */ | |
597 | if (copy_to_user(buf + done, buffer, actual)) { | |
598 | /* There must have been an addressing problem */ | |
599 | retval = -EFAULT; | |
600 | goto exit; | |
601 | } | |
602 | done += actual; | |
603 | } | |
5b775f67 GKH |
604 | } |
605 | ||
606 | /* Update file position value */ | |
607 | *f_pos = *f_pos + done; | |
608 | retval = done; | |
609 | ||
610 | exit: | |
611 | mutex_unlock(&data->io_mutex); | |
612 | kfree(buffer); | |
613 | return retval; | |
614 | } | |
615 | ||
616 | static ssize_t usbtmc_write(struct file *filp, const char __user *buf, | |
617 | size_t count, loff_t *f_pos) | |
618 | { | |
619 | struct usbtmc_device_data *data; | |
620 | u8 *buffer; | |
621 | int retval; | |
622 | int actual; | |
623 | unsigned long int n_bytes; | |
5b775f67 GKH |
624 | int remaining; |
625 | int done; | |
626 | int this_part; | |
627 | ||
628 | data = filp->private_data; | |
629 | ||
630 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
631 | if (!buffer) | |
632 | return -ENOMEM; | |
633 | ||
634 | mutex_lock(&data->io_mutex); | |
86286883 ON |
635 | if (data->zombie) { |
636 | retval = -ENODEV; | |
637 | goto exit; | |
638 | } | |
5b775f67 GKH |
639 | |
640 | remaining = count; | |
641 | done = 0; | |
642 | ||
643 | while (remaining > 0) { | |
50c9ba31 APF |
644 | if (remaining > USBTMC_SIZE_IOBUFFER - USBTMC_HEADER_SIZE) { |
645 | this_part = USBTMC_SIZE_IOBUFFER - USBTMC_HEADER_SIZE; | |
5b775f67 GKH |
646 | buffer[8] = 0; |
647 | } else { | |
648 | this_part = remaining; | |
649 | buffer[8] = 1; | |
650 | } | |
651 | ||
652 | /* Setup IO buffer for DEV_DEP_MSG_OUT message */ | |
653 | buffer[0] = 1; | |
654 | buffer[1] = data->bTag; | |
bbf4976e | 655 | buffer[2] = ~data->bTag; |
5b775f67 | 656 | buffer[3] = 0; /* Reserved */ |
bbf4976e AS |
657 | buffer[4] = this_part >> 0; |
658 | buffer[5] = this_part >> 8; | |
659 | buffer[6] = this_part >> 16; | |
660 | buffer[7] = this_part >> 24; | |
5b775f67 GKH |
661 | /* buffer[8] is set above... */ |
662 | buffer[9] = 0; /* Reserved */ | |
663 | buffer[10] = 0; /* Reserved */ | |
664 | buffer[11] = 0; /* Reserved */ | |
665 | ||
50c9ba31 | 666 | if (copy_from_user(&buffer[USBTMC_HEADER_SIZE], buf + done, this_part)) { |
5b775f67 GKH |
667 | retval = -EFAULT; |
668 | goto exit; | |
669 | } | |
670 | ||
50c9ba31 APF |
671 | n_bytes = roundup(USBTMC_HEADER_SIZE + this_part, 4); |
672 | memset(buffer + USBTMC_HEADER_SIZE + this_part, 0, n_bytes - (USBTMC_HEADER_SIZE + this_part)); | |
5b775f67 | 673 | |
ec412b92 AH |
674 | do { |
675 | retval = usb_bulk_msg(data->usb_dev, | |
676 | usb_sndbulkpipe(data->usb_dev, | |
677 | data->bulk_out), | |
678 | buffer, n_bytes, | |
679 | &actual, USBTMC_TIMEOUT); | |
680 | if (retval != 0) | |
681 | break; | |
682 | n_bytes -= actual; | |
683 | } while (n_bytes); | |
5b775f67 GKH |
684 | |
685 | data->bTag_last_write = data->bTag; | |
686 | data->bTag++; | |
687 | ||
688 | if (!data->bTag) | |
689 | data->bTag++; | |
690 | ||
691 | if (retval < 0) { | |
692 | dev_err(&data->intf->dev, | |
693 | "Unable to send data, error %d\n", retval); | |
694 | if (data->auto_abort) | |
695 | usbtmc_ioctl_abort_bulk_out(data); | |
696 | goto exit; | |
697 | } | |
698 | ||
699 | remaining -= this_part; | |
700 | done += this_part; | |
701 | } | |
702 | ||
703 | retval = count; | |
704 | exit: | |
705 | mutex_unlock(&data->io_mutex); | |
706 | kfree(buffer); | |
707 | return retval; | |
708 | } | |
709 | ||
710 | static int usbtmc_ioctl_clear(struct usbtmc_device_data *data) | |
711 | { | |
712 | struct usb_host_interface *current_setting; | |
713 | struct usb_endpoint_descriptor *desc; | |
714 | struct device *dev; | |
715 | u8 *buffer; | |
716 | int rv; | |
717 | int n; | |
ab53eb97 | 718 | int actual = 0; |
5b775f67 GKH |
719 | int max_size; |
720 | ||
721 | dev = &data->intf->dev; | |
722 | ||
723 | dev_dbg(dev, "Sending INITIATE_CLEAR request\n"); | |
724 | ||
725 | buffer = kmalloc(USBTMC_SIZE_IOBUFFER, GFP_KERNEL); | |
726 | if (!buffer) | |
727 | return -ENOMEM; | |
728 | ||
729 | rv = usb_control_msg(data->usb_dev, | |
730 | usb_rcvctrlpipe(data->usb_dev, 0), | |
731 | USBTMC_REQUEST_INITIATE_CLEAR, | |
732 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
733 | 0, 0, buffer, 1, USBTMC_TIMEOUT); | |
734 | if (rv < 0) { | |
735 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
736 | goto exit; | |
737 | } | |
738 | ||
739 | dev_dbg(dev, "INITIATE_CLEAR returned %x\n", buffer[0]); | |
740 | ||
741 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
742 | dev_err(dev, "INITIATE_CLEAR returned %x\n", buffer[0]); | |
743 | rv = -EPERM; | |
744 | goto exit; | |
745 | } | |
746 | ||
747 | max_size = 0; | |
748 | current_setting = data->intf->cur_altsetting; | |
749 | for (n = 0; n < current_setting->desc.bNumEndpoints; n++) { | |
750 | desc = ¤t_setting->endpoint[n].desc; | |
751 | if (desc->bEndpointAddress == data->bulk_in) | |
29cc8897 | 752 | max_size = usb_endpoint_maxp(desc); |
5b775f67 GKH |
753 | } |
754 | ||
755 | if (max_size == 0) { | |
756 | dev_err(dev, "Couldn't get wMaxPacketSize\n"); | |
757 | rv = -EPERM; | |
758 | goto exit; | |
759 | } | |
760 | ||
761 | dev_dbg(dev, "wMaxPacketSize is %d\n", max_size); | |
762 | ||
763 | n = 0; | |
764 | ||
765 | usbtmc_clear_check_status: | |
766 | ||
767 | dev_dbg(dev, "Sending CHECK_CLEAR_STATUS request\n"); | |
768 | ||
769 | rv = usb_control_msg(data->usb_dev, | |
770 | usb_rcvctrlpipe(data->usb_dev, 0), | |
771 | USBTMC_REQUEST_CHECK_CLEAR_STATUS, | |
772 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
773 | 0, 0, buffer, 2, USBTMC_TIMEOUT); | |
774 | if (rv < 0) { | |
775 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
776 | goto exit; | |
777 | } | |
778 | ||
779 | dev_dbg(dev, "CHECK_CLEAR_STATUS returned %x\n", buffer[0]); | |
780 | ||
781 | if (buffer[0] == USBTMC_STATUS_SUCCESS) | |
782 | goto usbtmc_clear_bulk_out_halt; | |
783 | ||
784 | if (buffer[0] != USBTMC_STATUS_PENDING) { | |
785 | dev_err(dev, "CHECK_CLEAR_STATUS returned %x\n", buffer[0]); | |
786 | rv = -EPERM; | |
787 | goto exit; | |
788 | } | |
789 | ||
790 | if (buffer[1] == 1) | |
791 | do { | |
792 | dev_dbg(dev, "Reading from bulk in EP\n"); | |
793 | ||
794 | rv = usb_bulk_msg(data->usb_dev, | |
795 | usb_rcvbulkpipe(data->usb_dev, | |
796 | data->bulk_in), | |
797 | buffer, USBTMC_SIZE_IOBUFFER, | |
798 | &actual, USBTMC_TIMEOUT); | |
799 | n++; | |
800 | ||
801 | if (rv < 0) { | |
802 | dev_err(dev, "usb_control_msg returned %d\n", | |
803 | rv); | |
804 | goto exit; | |
805 | } | |
806 | } while ((actual == max_size) && | |
807 | (n < USBTMC_MAX_READS_TO_CLEAR_BULK_IN)); | |
808 | ||
809 | if (actual == max_size) { | |
810 | dev_err(dev, "Couldn't clear device buffer within %d cycles\n", | |
811 | USBTMC_MAX_READS_TO_CLEAR_BULK_IN); | |
812 | rv = -EPERM; | |
813 | goto exit; | |
814 | } | |
815 | ||
816 | goto usbtmc_clear_check_status; | |
817 | ||
818 | usbtmc_clear_bulk_out_halt: | |
819 | ||
3342ecda SS |
820 | rv = usb_clear_halt(data->usb_dev, |
821 | usb_sndbulkpipe(data->usb_dev, data->bulk_out)); | |
5b775f67 GKH |
822 | if (rv < 0) { |
823 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
824 | goto exit; | |
825 | } | |
826 | rv = 0; | |
827 | ||
828 | exit: | |
829 | kfree(buffer); | |
830 | return rv; | |
831 | } | |
832 | ||
833 | static int usbtmc_ioctl_clear_out_halt(struct usbtmc_device_data *data) | |
834 | { | |
5b775f67 GKH |
835 | int rv; |
836 | ||
3342ecda SS |
837 | rv = usb_clear_halt(data->usb_dev, |
838 | usb_sndbulkpipe(data->usb_dev, data->bulk_out)); | |
5b775f67 GKH |
839 | |
840 | if (rv < 0) { | |
841 | dev_err(&data->usb_dev->dev, "usb_control_msg returned %d\n", | |
842 | rv); | |
ac9e59ca | 843 | return rv; |
5b775f67 | 844 | } |
ac9e59ca | 845 | return 0; |
5b775f67 GKH |
846 | } |
847 | ||
848 | static int usbtmc_ioctl_clear_in_halt(struct usbtmc_device_data *data) | |
849 | { | |
5b775f67 GKH |
850 | int rv; |
851 | ||
3342ecda SS |
852 | rv = usb_clear_halt(data->usb_dev, |
853 | usb_rcvbulkpipe(data->usb_dev, data->bulk_in)); | |
5b775f67 GKH |
854 | |
855 | if (rv < 0) { | |
856 | dev_err(&data->usb_dev->dev, "usb_control_msg returned %d\n", | |
857 | rv); | |
ac9e59ca | 858 | return rv; |
5b775f67 | 859 | } |
ac9e59ca | 860 | return 0; |
5b775f67 GKH |
861 | } |
862 | ||
863 | static int get_capabilities(struct usbtmc_device_data *data) | |
864 | { | |
865 | struct device *dev = &data->usb_dev->dev; | |
866 | char *buffer; | |
ca157c4a | 867 | int rv = 0; |
5b775f67 GKH |
868 | |
869 | buffer = kmalloc(0x18, GFP_KERNEL); | |
870 | if (!buffer) | |
871 | return -ENOMEM; | |
872 | ||
873 | rv = usb_control_msg(data->usb_dev, usb_rcvctrlpipe(data->usb_dev, 0), | |
874 | USBTMC_REQUEST_GET_CAPABILITIES, | |
875 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
876 | 0, 0, buffer, 0x18, USBTMC_TIMEOUT); | |
877 | if (rv < 0) { | |
878 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
ca157c4a | 879 | goto err_out; |
5b775f67 GKH |
880 | } |
881 | ||
882 | dev_dbg(dev, "GET_CAPABILITIES returned %x\n", buffer[0]); | |
5b775f67 GKH |
883 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { |
884 | dev_err(dev, "GET_CAPABILITIES returned %x\n", buffer[0]); | |
ca157c4a ON |
885 | rv = -EPERM; |
886 | goto err_out; | |
5b775f67 | 887 | } |
d0a38365 GI |
888 | dev_dbg(dev, "Interface capabilities are %x\n", buffer[4]); |
889 | dev_dbg(dev, "Device capabilities are %x\n", buffer[5]); | |
890 | dev_dbg(dev, "USB488 interface capabilities are %x\n", buffer[14]); | |
891 | dev_dbg(dev, "USB488 device capabilities are %x\n", buffer[15]); | |
5b775f67 GKH |
892 | |
893 | data->capabilities.interface_capabilities = buffer[4]; | |
894 | data->capabilities.device_capabilities = buffer[5]; | |
895 | data->capabilities.usb488_interface_capabilities = buffer[14]; | |
896 | data->capabilities.usb488_device_capabilities = buffer[15]; | |
d0a38365 | 897 | rv = 0; |
5b775f67 | 898 | |
ca157c4a | 899 | err_out: |
5b775f67 | 900 | kfree(buffer); |
ca157c4a | 901 | return rv; |
5b775f67 GKH |
902 | } |
903 | ||
904 | #define capability_attribute(name) \ | |
2a6eb8ac | 905 | static ssize_t name##_show(struct device *dev, \ |
5b775f67 GKH |
906 | struct device_attribute *attr, char *buf) \ |
907 | { \ | |
908 | struct usb_interface *intf = to_usb_interface(dev); \ | |
909 | struct usbtmc_device_data *data = usb_get_intfdata(intf); \ | |
910 | \ | |
911 | return sprintf(buf, "%d\n", data->capabilities.name); \ | |
912 | } \ | |
2a6eb8ac | 913 | static DEVICE_ATTR_RO(name) |
5b775f67 GKH |
914 | |
915 | capability_attribute(interface_capabilities); | |
916 | capability_attribute(device_capabilities); | |
917 | capability_attribute(usb488_interface_capabilities); | |
918 | capability_attribute(usb488_device_capabilities); | |
919 | ||
920 | static struct attribute *capability_attrs[] = { | |
921 | &dev_attr_interface_capabilities.attr, | |
922 | &dev_attr_device_capabilities.attr, | |
923 | &dev_attr_usb488_interface_capabilities.attr, | |
924 | &dev_attr_usb488_device_capabilities.attr, | |
925 | NULL, | |
926 | }; | |
927 | ||
928 | static struct attribute_group capability_attr_grp = { | |
929 | .attrs = capability_attrs, | |
930 | }; | |
931 | ||
2a6eb8ac | 932 | static ssize_t TermChar_show(struct device *dev, |
5b775f67 GKH |
933 | struct device_attribute *attr, char *buf) |
934 | { | |
935 | struct usb_interface *intf = to_usb_interface(dev); | |
936 | struct usbtmc_device_data *data = usb_get_intfdata(intf); | |
937 | ||
938 | return sprintf(buf, "%c\n", data->TermChar); | |
939 | } | |
940 | ||
2a6eb8ac | 941 | static ssize_t TermChar_store(struct device *dev, |
5b775f67 GKH |
942 | struct device_attribute *attr, |
943 | const char *buf, size_t count) | |
944 | { | |
945 | struct usb_interface *intf = to_usb_interface(dev); | |
946 | struct usbtmc_device_data *data = usb_get_intfdata(intf); | |
947 | ||
948 | if (count < 1) | |
949 | return -EINVAL; | |
950 | data->TermChar = buf[0]; | |
951 | return count; | |
952 | } | |
2a6eb8ac | 953 | static DEVICE_ATTR_RW(TermChar); |
5b775f67 GKH |
954 | |
955 | #define data_attribute(name) \ | |
2a6eb8ac | 956 | static ssize_t name##_show(struct device *dev, \ |
5b775f67 GKH |
957 | struct device_attribute *attr, char *buf) \ |
958 | { \ | |
959 | struct usb_interface *intf = to_usb_interface(dev); \ | |
960 | struct usbtmc_device_data *data = usb_get_intfdata(intf); \ | |
961 | \ | |
962 | return sprintf(buf, "%d\n", data->name); \ | |
963 | } \ | |
2a6eb8ac | 964 | static ssize_t name##_store(struct device *dev, \ |
5b775f67 GKH |
965 | struct device_attribute *attr, \ |
966 | const char *buf, size_t count) \ | |
967 | { \ | |
968 | struct usb_interface *intf = to_usb_interface(dev); \ | |
969 | struct usbtmc_device_data *data = usb_get_intfdata(intf); \ | |
970 | ssize_t result; \ | |
971 | unsigned val; \ | |
972 | \ | |
973 | result = sscanf(buf, "%u\n", &val); \ | |
974 | if (result != 1) \ | |
975 | result = -EINVAL; \ | |
976 | data->name = val; \ | |
977 | if (result < 0) \ | |
978 | return result; \ | |
979 | else \ | |
980 | return count; \ | |
981 | } \ | |
2a6eb8ac | 982 | static DEVICE_ATTR_RW(name) |
5b775f67 GKH |
983 | |
984 | data_attribute(TermCharEnabled); | |
985 | data_attribute(auto_abort); | |
986 | ||
987 | static struct attribute *data_attrs[] = { | |
988 | &dev_attr_TermChar.attr, | |
989 | &dev_attr_TermCharEnabled.attr, | |
990 | &dev_attr_auto_abort.attr, | |
991 | NULL, | |
992 | }; | |
993 | ||
994 | static struct attribute_group data_attr_grp = { | |
995 | .attrs = data_attrs, | |
996 | }; | |
997 | ||
998 | static int usbtmc_ioctl_indicator_pulse(struct usbtmc_device_data *data) | |
999 | { | |
1000 | struct device *dev; | |
1001 | u8 *buffer; | |
1002 | int rv; | |
1003 | ||
1004 | dev = &data->intf->dev; | |
1005 | ||
1006 | buffer = kmalloc(2, GFP_KERNEL); | |
1007 | if (!buffer) | |
1008 | return -ENOMEM; | |
1009 | ||
1010 | rv = usb_control_msg(data->usb_dev, | |
1011 | usb_rcvctrlpipe(data->usb_dev, 0), | |
1012 | USBTMC_REQUEST_INDICATOR_PULSE, | |
1013 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
1014 | 0, 0, buffer, 0x01, USBTMC_TIMEOUT); | |
1015 | ||
1016 | if (rv < 0) { | |
1017 | dev_err(dev, "usb_control_msg returned %d\n", rv); | |
1018 | goto exit; | |
1019 | } | |
1020 | ||
1021 | dev_dbg(dev, "INDICATOR_PULSE returned %x\n", buffer[0]); | |
1022 | ||
1023 | if (buffer[0] != USBTMC_STATUS_SUCCESS) { | |
1024 | dev_err(dev, "INDICATOR_PULSE returned %x\n", buffer[0]); | |
1025 | rv = -EPERM; | |
1026 | goto exit; | |
1027 | } | |
1028 | rv = 0; | |
1029 | ||
1030 | exit: | |
1031 | kfree(buffer); | |
1032 | return rv; | |
1033 | } | |
1034 | ||
1035 | static long usbtmc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1036 | { | |
1037 | struct usbtmc_device_data *data; | |
1038 | int retval = -EBADRQC; | |
1039 | ||
1040 | data = file->private_data; | |
1041 | mutex_lock(&data->io_mutex); | |
86286883 ON |
1042 | if (data->zombie) { |
1043 | retval = -ENODEV; | |
1044 | goto skip_io_on_zombie; | |
1045 | } | |
5b775f67 GKH |
1046 | |
1047 | switch (cmd) { | |
1048 | case USBTMC_IOCTL_CLEAR_OUT_HALT: | |
1049 | retval = usbtmc_ioctl_clear_out_halt(data); | |
a92b63e7 | 1050 | break; |
5b775f67 GKH |
1051 | |
1052 | case USBTMC_IOCTL_CLEAR_IN_HALT: | |
1053 | retval = usbtmc_ioctl_clear_in_halt(data); | |
a92b63e7 | 1054 | break; |
5b775f67 GKH |
1055 | |
1056 | case USBTMC_IOCTL_INDICATOR_PULSE: | |
1057 | retval = usbtmc_ioctl_indicator_pulse(data); | |
a92b63e7 | 1058 | break; |
5b775f67 GKH |
1059 | |
1060 | case USBTMC_IOCTL_CLEAR: | |
1061 | retval = usbtmc_ioctl_clear(data); | |
a92b63e7 | 1062 | break; |
5b775f67 GKH |
1063 | |
1064 | case USBTMC_IOCTL_ABORT_BULK_OUT: | |
1065 | retval = usbtmc_ioctl_abort_bulk_out(data); | |
a92b63e7 | 1066 | break; |
5b775f67 GKH |
1067 | |
1068 | case USBTMC_IOCTL_ABORT_BULK_IN: | |
1069 | retval = usbtmc_ioctl_abort_bulk_in(data); | |
a92b63e7 | 1070 | break; |
5b775f67 GKH |
1071 | } |
1072 | ||
86286883 | 1073 | skip_io_on_zombie: |
5b775f67 GKH |
1074 | mutex_unlock(&data->io_mutex); |
1075 | return retval; | |
1076 | } | |
1077 | ||
828c0950 | 1078 | static const struct file_operations fops = { |
5b775f67 GKH |
1079 | .owner = THIS_MODULE, |
1080 | .read = usbtmc_read, | |
1081 | .write = usbtmc_write, | |
1082 | .open = usbtmc_open, | |
1083 | .release = usbtmc_release, | |
1084 | .unlocked_ioctl = usbtmc_ioctl, | |
6038f373 | 1085 | .llseek = default_llseek, |
5b775f67 GKH |
1086 | }; |
1087 | ||
1088 | static struct usb_class_driver usbtmc_class = { | |
1089 | .name = "usbtmc%d", | |
1090 | .fops = &fops, | |
1091 | .minor_base = USBTMC_MINOR_BASE, | |
1092 | }; | |
1093 | ||
1094 | ||
1095 | static int usbtmc_probe(struct usb_interface *intf, | |
1096 | const struct usb_device_id *id) | |
1097 | { | |
1098 | struct usbtmc_device_data *data; | |
1099 | struct usb_host_interface *iface_desc; | |
1100 | struct usb_endpoint_descriptor *endpoint; | |
1101 | int n; | |
1102 | int retcode; | |
1103 | ||
1104 | dev_dbg(&intf->dev, "%s called\n", __func__); | |
1105 | ||
e6c7efdc | 1106 | data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL); |
b8f2854b | 1107 | if (!data) |
5b775f67 | 1108 | return -ENOMEM; |
5b775f67 GKH |
1109 | |
1110 | data->intf = intf; | |
1111 | data->id = id; | |
1112 | data->usb_dev = usb_get_dev(interface_to_usbdev(intf)); | |
1113 | usb_set_intfdata(intf, data); | |
1114 | kref_init(&data->kref); | |
1115 | mutex_init(&data->io_mutex); | |
86286883 | 1116 | data->zombie = 0; |
5b775f67 | 1117 | |
c2e31483 APF |
1118 | /* Determine if it is a Rigol or not */ |
1119 | data->rigol_quirk = 0; | |
1120 | dev_dbg(&intf->dev, "Trying to find if device Vendor 0x%04X Product 0x%04X has the RIGOL quirk\n", | |
c786138f JH |
1121 | le16_to_cpu(data->usb_dev->descriptor.idVendor), |
1122 | le16_to_cpu(data->usb_dev->descriptor.idProduct)); | |
c2e31483 | 1123 | for(n = 0; usbtmc_id_quirk[n].idVendor > 0; n++) { |
c786138f JH |
1124 | if ((usbtmc_id_quirk[n].idVendor == le16_to_cpu(data->usb_dev->descriptor.idVendor)) && |
1125 | (usbtmc_id_quirk[n].idProduct == le16_to_cpu(data->usb_dev->descriptor.idProduct))) { | |
c2e31483 APF |
1126 | dev_dbg(&intf->dev, "Setting this device as having the RIGOL quirk\n"); |
1127 | data->rigol_quirk = 1; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
5b775f67 GKH |
1132 | /* Initialize USBTMC bTag and other fields */ |
1133 | data->bTag = 1; | |
1134 | data->TermCharEnabled = 0; | |
1135 | data->TermChar = '\n'; | |
1136 | ||
1137 | /* USBTMC devices have only one setting, so use that */ | |
1138 | iface_desc = data->intf->cur_altsetting; | |
1139 | ||
1140 | /* Find bulk in endpoint */ | |
1141 | for (n = 0; n < iface_desc->desc.bNumEndpoints; n++) { | |
1142 | endpoint = &iface_desc->endpoint[n].desc; | |
1143 | ||
1144 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1145 | data->bulk_in = endpoint->bEndpointAddress; | |
1146 | dev_dbg(&intf->dev, "Found bulk in endpoint at %u\n", | |
1147 | data->bulk_in); | |
1148 | break; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* Find bulk out endpoint */ | |
1153 | for (n = 0; n < iface_desc->desc.bNumEndpoints; n++) { | |
1154 | endpoint = &iface_desc->endpoint[n].desc; | |
1155 | ||
1156 | if (usb_endpoint_is_bulk_out(endpoint)) { | |
1157 | data->bulk_out = endpoint->bEndpointAddress; | |
1158 | dev_dbg(&intf->dev, "Found Bulk out endpoint at %u\n", | |
1159 | data->bulk_out); | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | retcode = get_capabilities(data); | |
1165 | if (retcode) | |
1166 | dev_err(&intf->dev, "can't read capabilities\n"); | |
1167 | else | |
1168 | retcode = sysfs_create_group(&intf->dev.kobj, | |
1169 | &capability_attr_grp); | |
1170 | ||
1171 | retcode = sysfs_create_group(&intf->dev.kobj, &data_attr_grp); | |
1172 | ||
1173 | retcode = usb_register_dev(intf, &usbtmc_class); | |
1174 | if (retcode) { | |
1175 | dev_err(&intf->dev, "Not able to get a minor" | |
1176 | " (base %u, slice default): %d\n", USBTMC_MINOR_BASE, | |
1177 | retcode); | |
1178 | goto error_register; | |
1179 | } | |
1180 | dev_dbg(&intf->dev, "Using minor number %d\n", intf->minor); | |
1181 | ||
1182 | return 0; | |
1183 | ||
1184 | error_register: | |
1185 | sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp); | |
1186 | sysfs_remove_group(&intf->dev.kobj, &data_attr_grp); | |
1187 | kref_put(&data->kref, usbtmc_delete); | |
1188 | return retcode; | |
1189 | } | |
1190 | ||
1191 | static void usbtmc_disconnect(struct usb_interface *intf) | |
1192 | { | |
1193 | struct usbtmc_device_data *data; | |
1194 | ||
1195 | dev_dbg(&intf->dev, "usbtmc_disconnect called\n"); | |
1196 | ||
1197 | data = usb_get_intfdata(intf); | |
1198 | usb_deregister_dev(intf, &usbtmc_class); | |
1199 | sysfs_remove_group(&intf->dev.kobj, &capability_attr_grp); | |
1200 | sysfs_remove_group(&intf->dev.kobj, &data_attr_grp); | |
86286883 ON |
1201 | mutex_lock(&data->io_mutex); |
1202 | data->zombie = 1; | |
1203 | mutex_unlock(&data->io_mutex); | |
5b775f67 GKH |
1204 | kref_put(&data->kref, usbtmc_delete); |
1205 | } | |
1206 | ||
dca8cd04 | 1207 | static int usbtmc_suspend(struct usb_interface *intf, pm_message_t message) |
a4708103 ON |
1208 | { |
1209 | /* this driver does not have pending URBs */ | |
1210 | return 0; | |
1211 | } | |
1212 | ||
dca8cd04 | 1213 | static int usbtmc_resume(struct usb_interface *intf) |
a4708103 ON |
1214 | { |
1215 | return 0; | |
1216 | } | |
1217 | ||
5b775f67 GKH |
1218 | static struct usb_driver usbtmc_driver = { |
1219 | .name = "usbtmc", | |
1220 | .id_table = usbtmc_devices, | |
1221 | .probe = usbtmc_probe, | |
a4708103 ON |
1222 | .disconnect = usbtmc_disconnect, |
1223 | .suspend = usbtmc_suspend, | |
1224 | .resume = usbtmc_resume, | |
5b775f67 GKH |
1225 | }; |
1226 | ||
65db4305 | 1227 | module_usb_driver(usbtmc_driver); |
5b775f67 GKH |
1228 | |
1229 | MODULE_LICENSE("GPL"); |