blob: 7b306aa22d2589518d696111cb2750bdc3bed4c0 [file] [log] [blame]
Greg Kroah-Hartman5fd54ac2017-11-03 11:28:30 +01001// SPDX-License-Identifier: GPL-2.0
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +09002/*
3 * Driver for Meywa-Denki & KAYAC YUREX
4 *
5 * Copyright (C) 2010 Tomoki Sekiyama (tomoki.sekiyama@gmail.com)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +09006 */
7
8#include <linux/kernel.h>
9#include <linux/errno.h>
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +090010#include <linux/slab.h>
11#include <linux/module.h>
12#include <linux/kref.h>
13#include <linux/mutex.h>
14#include <linux/uaccess.h>
15#include <linux/usb.h>
16#include <linux/hid.h>
17
18#define DRIVER_AUTHOR "Tomoki Sekiyama"
19#define DRIVER_DESC "Driver for Meywa-Denki & KAYAC YUREX"
20
21#define YUREX_VENDOR_ID 0x0c45
22#define YUREX_PRODUCT_ID 0x1010
23
24#define CMD_ACK '!'
25#define CMD_ANIMATE 'A'
26#define CMD_COUNT 'C'
27#define CMD_LED 'L'
28#define CMD_READ 'R'
29#define CMD_SET 'S'
30#define CMD_VERSION 'V'
31#define CMD_EOF 0x0d
32#define CMD_PADDING 0xff
33
34#define YUREX_BUF_SIZE 8
Tomoki Sekiyamae06ea972010-10-03 06:59:06 +090035#define YUREX_WRITE_TIMEOUT (HZ*2)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +090036
37/* table of devices that work with this driver */
38static struct usb_device_id yurex_table[] = {
39 { USB_DEVICE(YUREX_VENDOR_ID, YUREX_PRODUCT_ID) },
40 { } /* Terminating entry */
41};
42MODULE_DEVICE_TABLE(usb, yurex_table);
43
44#ifdef CONFIG_USB_DYNAMIC_MINORS
Greg Kroah-Hartman1b62d252010-09-30 05:01:22 -070045#define YUREX_MINOR_BASE 0
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +090046#else
Greg Kroah-Hartman1b62d252010-09-30 05:01:22 -070047#define YUREX_MINOR_BASE 192
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +090048#endif
49
50/* Structure to hold all of our device specific stuff */
51struct usb_yurex {
52 struct usb_device *udev;
53 struct usb_interface *interface;
54 __u8 int_in_endpointAddr;
55 struct urb *urb; /* URB for interrupt in */
56 unsigned char *int_buffer; /* buffer for intterupt in */
57 struct urb *cntl_urb; /* URB for control msg */
58 struct usb_ctrlrequest *cntl_req; /* req for control msg */
59 unsigned char *cntl_buffer; /* buffer for control msg */
60
61 struct kref kref;
62 struct mutex io_mutex;
63 struct fasync_struct *async_queue;
64 wait_queue_head_t waitq;
65
66 spinlock_t lock;
67 __s64 bbu; /* BBU from device */
68};
69#define to_yurex_dev(d) container_of(d, struct usb_yurex, kref)
70
71static struct usb_driver yurex_driver;
72static const struct file_operations yurex_fops;
73
74
75static void yurex_control_callback(struct urb *urb)
76{
77 struct usb_yurex *dev = urb->context;
78 int status = urb->status;
79
80 if (status) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -070081 dev_err(&urb->dev->dev, "%s - control failed: %d\n",
82 __func__, status);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +090083 wake_up_interruptible(&dev->waitq);
84 return;
85 }
86 /* on success, sender woken up by CMD_ACK int in, or timeout */
87}
88
89static void yurex_delete(struct kref *kref)
90{
91 struct usb_yurex *dev = to_yurex_dev(kref);
92
Greg Kroah-Hartmanaadd6472012-05-01 21:34:11 -070093 dev_dbg(&dev->interface->dev, "%s\n", __func__);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +090094
95 usb_put_dev(dev->udev);
Tomoki Sekiyamae06ea972010-10-03 06:59:06 +090096 if (dev->cntl_urb) {
97 usb_kill_urb(dev->cntl_urb);
Tomoki Sekiyama523fc5c2012-03-30 08:51:28 +090098 kfree(dev->cntl_req);
Tomoki Sekiyamae06ea972010-10-03 06:59:06 +090099 if (dev->cntl_buffer)
100 usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
101 dev->cntl_buffer, dev->cntl_urb->transfer_dma);
102 usb_free_urb(dev->cntl_urb);
103 }
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900104 if (dev->urb) {
105 usb_kill_urb(dev->urb);
106 if (dev->int_buffer)
107 usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
108 dev->int_buffer, dev->urb->transfer_dma);
109 usb_free_urb(dev->urb);
110 }
111 kfree(dev);
112}
113
114/*
115 * usb class driver info in order to get a minor number from the usb core,
116 * and to have the device registered with the driver core
117 */
118static struct usb_class_driver yurex_class = {
119 .name = "yurex%d",
120 .fops = &yurex_fops,
121 .minor_base = YUREX_MINOR_BASE,
122};
123
124static void yurex_interrupt(struct urb *urb)
125{
126 struct usb_yurex *dev = urb->context;
127 unsigned char *buf = dev->int_buffer;
128 int status = urb->status;
129 unsigned long flags;
130 int retval, i;
131
132 switch (status) {
133 case 0: /*success*/
134 break;
135 case -EOVERFLOW:
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700136 dev_err(&dev->interface->dev,
137 "%s - overflow with length %d, actual length is %d\n",
138 __func__, YUREX_BUF_SIZE, dev->urb->actual_length);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900139 case -ECONNRESET:
140 case -ENOENT:
141 case -ESHUTDOWN:
142 case -EILSEQ:
143 /* The device is terminated, clean up */
144 return;
145 default:
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700146 dev_err(&dev->interface->dev,
147 "%s - unknown status received: %d\n", __func__, status);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900148 goto exit;
149 }
150
151 /* handle received message */
152 switch (buf[0]) {
153 case CMD_COUNT:
154 case CMD_READ:
155 if (buf[6] == CMD_EOF) {
156 spin_lock_irqsave(&dev->lock, flags);
157 dev->bbu = 0;
158 for (i = 1; i < 6; i++) {
159 dev->bbu += buf[i];
160 if (i != 5)
161 dev->bbu <<= 8;
162 }
Greg Kroah-Hartmanaadd6472012-05-01 21:34:11 -0700163 dev_dbg(&dev->interface->dev, "%s count: %lld\n",
164 __func__, dev->bbu);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900165 spin_unlock_irqrestore(&dev->lock, flags);
166
167 kill_fasync(&dev->async_queue, SIGIO, POLL_IN);
168 }
169 else
Greg Kroah-Hartmanaadd6472012-05-01 21:34:11 -0700170 dev_dbg(&dev->interface->dev,
171 "data format error - no EOF\n");
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900172 break;
173 case CMD_ACK:
Greg Kroah-Hartmanaadd6472012-05-01 21:34:11 -0700174 dev_dbg(&dev->interface->dev, "%s ack: %c\n",
175 __func__, buf[1]);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900176 wake_up_interruptible(&dev->waitq);
177 break;
178 }
179
180exit:
181 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
182 if (retval) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700183 dev_err(&dev->interface->dev, "%s - usb_submit_urb failed: %d\n",
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900184 __func__, retval);
185 }
186}
187
188static int yurex_probe(struct usb_interface *interface, const struct usb_device_id *id)
189{
190 struct usb_yurex *dev;
191 struct usb_host_interface *iface_desc;
192 struct usb_endpoint_descriptor *endpoint;
193 int retval = -ENOMEM;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900194 DEFINE_WAIT(wait);
Johan Hovold499841e2017-03-17 11:35:45 +0100195 int res;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900196
197 /* allocate memory for our device state and initialize it */
198 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
Wolfram Sang0c2bc5c2016-08-25 19:39:25 +0200199 if (!dev)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900200 goto error;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900201 kref_init(&dev->kref);
202 mutex_init(&dev->io_mutex);
203 spin_lock_init(&dev->lock);
204 init_waitqueue_head(&dev->waitq);
205
206 dev->udev = usb_get_dev(interface_to_usbdev(interface));
207 dev->interface = interface;
208
209 /* set up the endpoint information */
210 iface_desc = interface->cur_altsetting;
Johan Hovold499841e2017-03-17 11:35:45 +0100211 res = usb_find_int_in_endpoint(iface_desc, &endpoint);
212 if (res) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700213 dev_err(&interface->dev, "Could not find endpoints\n");
Johan Hovold499841e2017-03-17 11:35:45 +0100214 retval = res;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900215 goto error;
216 }
217
Johan Hovold499841e2017-03-17 11:35:45 +0100218 dev->int_in_endpointAddr = endpoint->bEndpointAddress;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900219
220 /* allocate control URB */
221 dev->cntl_urb = usb_alloc_urb(0, GFP_KERNEL);
Wolfram Sang0450ba42016-08-11 23:14:45 +0200222 if (!dev->cntl_urb)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900223 goto error;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900224
225 /* allocate buffer for control req */
Tomoki Sekiyama523fc5c2012-03-30 08:51:28 +0900226 dev->cntl_req = kmalloc(YUREX_BUF_SIZE, GFP_KERNEL);
Wolfram Sang0c2bc5c2016-08-25 19:39:25 +0200227 if (!dev->cntl_req)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900228 goto error;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900229
230 /* allocate buffer for control msg */
231 dev->cntl_buffer = usb_alloc_coherent(dev->udev, YUREX_BUF_SIZE,
232 GFP_KERNEL,
233 &dev->cntl_urb->transfer_dma);
234 if (!dev->cntl_buffer) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700235 dev_err(&interface->dev, "Could not allocate cntl_buffer\n");
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900236 goto error;
237 }
238
239 /* configure control URB */
240 dev->cntl_req->bRequestType = USB_DIR_OUT | USB_TYPE_CLASS |
241 USB_RECIP_INTERFACE;
242 dev->cntl_req->bRequest = HID_REQ_SET_REPORT;
243 dev->cntl_req->wValue = cpu_to_le16((HID_OUTPUT_REPORT + 1) << 8);
244 dev->cntl_req->wIndex = cpu_to_le16(iface_desc->desc.bInterfaceNumber);
245 dev->cntl_req->wLength = cpu_to_le16(YUREX_BUF_SIZE);
246
247 usb_fill_control_urb(dev->cntl_urb, dev->udev,
248 usb_sndctrlpipe(dev->udev, 0),
249 (void *)dev->cntl_req, dev->cntl_buffer,
250 YUREX_BUF_SIZE, yurex_control_callback, dev);
Tomoki Sekiyamae06ea972010-10-03 06:59:06 +0900251 dev->cntl_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900252
253
254 /* allocate interrupt URB */
255 dev->urb = usb_alloc_urb(0, GFP_KERNEL);
Wolfram Sang0450ba42016-08-11 23:14:45 +0200256 if (!dev->urb)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900257 goto error;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900258
259 /* allocate buffer for interrupt in */
260 dev->int_buffer = usb_alloc_coherent(dev->udev, YUREX_BUF_SIZE,
261 GFP_KERNEL, &dev->urb->transfer_dma);
262 if (!dev->int_buffer) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700263 dev_err(&interface->dev, "Could not allocate int_buffer\n");
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900264 goto error;
265 }
266
267 /* configure interrupt URB */
268 usb_fill_int_urb(dev->urb, dev->udev,
269 usb_rcvintpipe(dev->udev, dev->int_in_endpointAddr),
270 dev->int_buffer, YUREX_BUF_SIZE, yurex_interrupt,
271 dev, 1);
Tomoki Sekiyama532f17b2012-03-30 08:51:36 +0900272 dev->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900273 if (usb_submit_urb(dev->urb, GFP_KERNEL)) {
274 retval = -EIO;
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700275 dev_err(&interface->dev, "Could not submitting URB\n");
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900276 goto error;
277 }
278
279 /* save our data pointer in this interface device */
280 usb_set_intfdata(interface, dev);
Oliver Neukumc78d1ecf2014-05-19 13:52:20 +0200281 dev->bbu = -1;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900282
283 /* we can register the device now, as it is ready */
284 retval = usb_register_dev(interface, &yurex_class);
285 if (retval) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700286 dev_err(&interface->dev,
287 "Not able to get a minor for this device.\n");
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900288 usb_set_intfdata(interface, NULL);
289 goto error;
290 }
291
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900292 dev_info(&interface->dev,
Tomoki Sekiyamae06ea972010-10-03 06:59:06 +0900293 "USB YUREX device now attached to Yurex #%d\n",
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900294 interface->minor);
295
296 return 0;
297
298error:
299 if (dev)
300 /* this frees allocated memory */
301 kref_put(&dev->kref, yurex_delete);
302 return retval;
303}
304
305static void yurex_disconnect(struct usb_interface *interface)
306{
307 struct usb_yurex *dev;
308 int minor = interface->minor;
309
310 dev = usb_get_intfdata(interface);
311 usb_set_intfdata(interface, NULL);
312
313 /* give back our minor */
314 usb_deregister_dev(interface, &yurex_class);
315
316 /* prevent more I/O from starting */
Alan Sternef61eb42019-04-23 14:48:29 -0400317 usb_poison_urb(dev->urb);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900318 mutex_lock(&dev->io_mutex);
319 dev->interface = NULL;
320 mutex_unlock(&dev->io_mutex);
321
322 /* wakeup waiters */
323 kill_fasync(&dev->async_queue, SIGIO, POLL_IN);
324 wake_up_interruptible(&dev->waitq);
325
326 /* decrement our usage count */
327 kref_put(&dev->kref, yurex_delete);
328
Tomoki Sekiyamae06ea972010-10-03 06:59:06 +0900329 dev_info(&interface->dev, "USB YUREX #%d now disconnected\n", minor);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900330}
331
332static struct usb_driver yurex_driver = {
333 .name = "yurex",
334 .probe = yurex_probe,
335 .disconnect = yurex_disconnect,
336 .id_table = yurex_table,
337};
338
339
340static int yurex_fasync(int fd, struct file *file, int on)
341{
342 struct usb_yurex *dev;
343
Arjun Sreedharan113ad912014-08-19 04:23:34 +0530344 dev = file->private_data;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900345 return fasync_helper(fd, file, on, &dev->async_queue);
346}
347
348static int yurex_open(struct inode *inode, struct file *file)
349{
350 struct usb_yurex *dev;
351 struct usb_interface *interface;
352 int subminor;
353 int retval = 0;
354
355 subminor = iminor(inode);
356
357 interface = usb_find_interface(&yurex_driver, subminor);
358 if (!interface) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700359 printk(KERN_ERR "%s - error, can't find device for minor %d",
360 __func__, subminor);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900361 retval = -ENODEV;
362 goto exit;
363 }
364
365 dev = usb_get_intfdata(interface);
366 if (!dev) {
367 retval = -ENODEV;
368 goto exit;
369 }
370
371 /* increment our usage count for the device */
372 kref_get(&dev->kref);
373
374 /* save our object in the file's private structure */
375 mutex_lock(&dev->io_mutex);
376 file->private_data = dev;
377 mutex_unlock(&dev->io_mutex);
378
379exit:
380 return retval;
381}
382
383static int yurex_release(struct inode *inode, struct file *file)
384{
385 struct usb_yurex *dev;
386
Arjun Sreedharan113ad912014-08-19 04:23:34 +0530387 dev = file->private_data;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900388 if (dev == NULL)
389 return -ENODEV;
390
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900391 /* decrement the count on our device */
392 kref_put(&dev->kref, yurex_delete);
393 return 0;
394}
395
Sudip Mukherjee1cc373c2014-10-10 18:19:45 +0530396static ssize_t yurex_read(struct file *file, char __user *buffer, size_t count,
397 loff_t *ppos)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900398{
399 struct usb_yurex *dev;
Jann Hornf1e255d2018-07-06 17:12:56 +0200400 int len = 0;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900401 char in_buffer[20];
402 unsigned long flags;
403
Arjun Sreedharan113ad912014-08-19 04:23:34 +0530404 dev = file->private_data;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900405
406 mutex_lock(&dev->io_mutex);
407 if (!dev->interface) { /* already disconnected */
Jann Hornf1e255d2018-07-06 17:12:56 +0200408 mutex_unlock(&dev->io_mutex);
409 return -ENODEV;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900410 }
411
412 spin_lock_irqsave(&dev->lock, flags);
Jann Hornf1e255d2018-07-06 17:12:56 +0200413 len = snprintf(in_buffer, 20, "%lld\n", dev->bbu);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900414 spin_unlock_irqrestore(&dev->lock, flags);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900415 mutex_unlock(&dev->io_mutex);
Jann Hornf1e255d2018-07-06 17:12:56 +0200416
Ben Hutchings14427b82018-08-15 21:45:37 +0100417 if (WARN_ON_ONCE(len >= sizeof(in_buffer)))
418 return -EIO;
419
Jann Hornf1e255d2018-07-06 17:12:56 +0200420 return simple_read_from_buffer(buffer, count, ppos, in_buffer, len);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900421}
422
Sudip Mukherjee1cc373c2014-10-10 18:19:45 +0530423static ssize_t yurex_write(struct file *file, const char __user *user_buffer,
424 size_t count, loff_t *ppos)
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900425{
426 struct usb_yurex *dev;
427 int i, set = 0, retval = 0;
Ben Hutchings7e10f142018-08-15 21:44:25 +0100428 char buffer[16 + 1];
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900429 char *data = buffer;
430 unsigned long long c, c2 = 0;
431 signed long timeout = 0;
432 DEFINE_WAIT(wait);
433
Ben Hutchings7e10f142018-08-15 21:44:25 +0100434 count = min(sizeof(buffer) - 1, count);
Arjun Sreedharan113ad912014-08-19 04:23:34 +0530435 dev = file->private_data;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900436
437 /* verify that we actually have some data to write */
438 if (count == 0)
439 goto error;
440
441 mutex_lock(&dev->io_mutex);
Rahul Bedarkar3fb4c072013-12-30 20:49:19 +0530442 if (!dev->interface) { /* already disconnected */
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900443 mutex_unlock(&dev->io_mutex);
444 retval = -ENODEV;
445 goto error;
446 }
447
448 if (copy_from_user(buffer, user_buffer, count)) {
449 mutex_unlock(&dev->io_mutex);
450 retval = -EFAULT;
451 goto error;
452 }
Ben Hutchings7e10f142018-08-15 21:44:25 +0100453 buffer[count] = 0;
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900454 memset(dev->cntl_buffer, CMD_PADDING, YUREX_BUF_SIZE);
455
456 switch (buffer[0]) {
457 case CMD_ANIMATE:
458 case CMD_LED:
459 dev->cntl_buffer[0] = buffer[0];
460 dev->cntl_buffer[1] = buffer[1];
461 dev->cntl_buffer[2] = CMD_EOF;
462 break;
463 case CMD_READ:
464 case CMD_VERSION:
465 dev->cntl_buffer[0] = buffer[0];
466 dev->cntl_buffer[1] = 0x00;
467 dev->cntl_buffer[2] = CMD_EOF;
468 break;
469 case CMD_SET:
470 data++;
471 /* FALL THROUGH */
472 case '0' ... '9':
473 set = 1;
474 c = c2 = simple_strtoull(data, NULL, 0);
475 dev->cntl_buffer[0] = CMD_SET;
476 for (i = 1; i < 6; i++) {
477 dev->cntl_buffer[i] = (c>>32) & 0xff;
478 c <<= 8;
479 }
480 buffer[6] = CMD_EOF;
481 break;
482 default:
483 mutex_unlock(&dev->io_mutex);
484 return -EINVAL;
485 }
486
487 /* send the data as the control msg */
488 prepare_to_wait(&dev->waitq, &wait, TASK_INTERRUPTIBLE);
Greg Kroah-Hartmanaadd6472012-05-01 21:34:11 -0700489 dev_dbg(&dev->interface->dev, "%s - submit %c\n", __func__,
490 dev->cntl_buffer[0]);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900491 retval = usb_submit_urb(dev->cntl_urb, GFP_KERNEL);
492 if (retval >= 0)
493 timeout = schedule_timeout(YUREX_WRITE_TIMEOUT);
494 finish_wait(&dev->waitq, &wait);
495
496 mutex_unlock(&dev->io_mutex);
497
498 if (retval < 0) {
Greg Kroah-Hartman45714102012-04-20 16:53:56 -0700499 dev_err(&dev->interface->dev,
500 "%s - failed to send bulk msg, error %d\n",
501 __func__, retval);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900502 goto error;
503 }
504 if (set && timeout)
505 dev->bbu = c2;
506 return timeout ? count : -EIO;
507
508error:
509 return retval;
510}
511
512static const struct file_operations yurex_fops = {
513 .owner = THIS_MODULE,
514 .read = yurex_read,
515 .write = yurex_write,
516 .open = yurex_open,
517 .release = yurex_release,
518 .fasync = yurex_fasync,
Tomoki Sekiyama27f485b2010-11-22 19:29:23 +0900519 .llseek = default_llseek,
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900520};
521
Greg Kroah-Hartman65db4302011-11-18 09:34:02 -0800522module_usb_driver(yurex_driver);
Tomoki Sekiyama6bc235a2010-09-29 12:16:50 +0900523
524MODULE_LICENSE("GPL");