Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * LEGO USB Tower driver | |
3 | * | |
4 | * Copyright (C) 2003 David Glance <davidgsf@sourceforge.net> | |
5 | * 2001-2004 Juergen Stuber <starblue@users.sourceforge.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License as | |
9 | * published by the Free Software Foundation; either version 2 of | |
10 | * the License, or (at your option) any later version. | |
11 | * | |
12 | * derived from USB Skeleton driver - 0.5 | |
13 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) | |
14 | * | |
15 | * History: | |
16 | * | |
17 | * 2001-10-13 - 0.1 js | |
18 | * - first version | |
19 | * 2001-11-03 - 0.2 js | |
20 | * - simplified buffering, one-shot URBs for writing | |
21 | * 2001-11-10 - 0.3 js | |
22 | * - removed IOCTL (setting power/mode is more complicated, postponed) | |
23 | * 2001-11-28 - 0.4 js | |
24 | * - added vendor commands for mode of operation and power level in open | |
25 | * 2001-12-04 - 0.5 js | |
26 | * - set IR mode by default (by oversight 0.4 set VLL mode) | |
27 | * 2002-01-11 - 0.5? pcchan | |
28 | * - make read buffer reusable and work around bytes_to_write issue between | |
29 | * uhci and legusbtower | |
30 | * 2002-09-23 - 0.52 david (david@csse.uwa.edu.au) | |
31 | * - imported into lejos project | |
32 | * - changed wake_up to wake_up_interruptible | |
33 | * - changed to use lego0 rather than tower0 | |
441b62c1 | 34 | * - changed dbg() to use __func__ rather than deprecated __func__ |
1da177e4 LT |
35 | * 2003-01-12 - 0.53 david (david@csse.uwa.edu.au) |
36 | * - changed read and write to write everything or | |
37 | * timeout (from a patch by Chris Riesen and Brett Thaeler driver) | |
38 | * - added ioctl functionality to set timeouts | |
39 | * 2003-07-18 - 0.54 davidgsf (david@csse.uwa.edu.au) | |
40 | * - initial import into LegoUSB project | |
41 | * - merge of existing LegoUSB.c driver | |
42 | * 2003-07-18 - 0.56 davidgsf (david@csse.uwa.edu.au) | |
43 | * - port to 2.6 style driver | |
44 | * 2004-02-29 - 0.6 Juergen Stuber <starblue@users.sourceforge.net> | |
45 | * - fix locking | |
46 | * - unlink read URBs which are no longer needed | |
47 | * - allow increased buffer size, eliminates need for timeout on write | |
48 | * - have read URB running continuously | |
49 | * - added poll | |
50 | * - forbid seeking | |
51 | * - added nonblocking I/O | |
441b62c1 | 52 | * - changed back __func__ to __func__ |
1da177e4 LT |
53 | * - read and log tower firmware version |
54 | * - reset tower on probe, avoids failure of first write | |
55 | * 2004-03-09 - 0.7 Juergen Stuber <starblue@users.sourceforge.net> | |
56 | * - timeout read now only after inactivity, shorten default accordingly | |
57 | * 2004-03-11 - 0.8 Juergen Stuber <starblue@users.sourceforge.net> | |
58 | * - log major, minor instead of possibly confusing device filename | |
59 | * - whitespace cleanup | |
60 | * 2004-03-12 - 0.9 Juergen Stuber <starblue@users.sourceforge.net> | |
61 | * - normalize whitespace in debug messages | |
62 | * - take care about endianness in control message responses | |
63 | * 2004-03-13 - 0.91 Juergen Stuber <starblue@users.sourceforge.net> | |
64 | * - make default intervals longer to accommodate current EHCI driver | |
65 | * 2004-03-19 - 0.92 Juergen Stuber <starblue@users.sourceforge.net> | |
66 | * - replaced atomic_t by memory barriers | |
67 | * 2004-04-21 - 0.93 Juergen Stuber <starblue@users.sourceforge.net> | |
68 | * - wait for completion of write urb in release (needed for remotecontrol) | |
69 | * - corrected poll for write direction (missing negation) | |
70 | * 2004-04-22 - 0.94 Juergen Stuber <starblue@users.sourceforge.net> | |
71 | * - make device locking interruptible | |
72 | * 2004-04-30 - 0.95 Juergen Stuber <starblue@users.sourceforge.net> | |
73 | * - check for valid udev on resubmitting and unlinking urbs | |
74 | * 2004-08-03 - 0.96 Juergen Stuber <starblue@users.sourceforge.net> | |
75 | * - move reset into open to clean out spurious data | |
76 | */ | |
77 | ||
1da177e4 LT |
78 | #include <linux/kernel.h> |
79 | #include <linux/errno.h> | |
80 | #include <linux/init.h> | |
81 | #include <linux/slab.h> | |
82 | #include <linux/module.h> | |
1da177e4 | 83 | #include <linux/completion.h> |
4186ecf8 | 84 | #include <linux/mutex.h> |
1da177e4 LT |
85 | #include <asm/uaccess.h> |
86 | #include <linux/usb.h> | |
87 | #include <linux/poll.h> | |
88 | ||
89 | ||
90 | #ifdef CONFIG_USB_DEBUG | |
91 | static int debug = 4; | |
92 | #else | |
93 | static int debug = 0; | |
94 | #endif | |
95 | ||
96 | /* Use our own dbg macro */ | |
97 | #undef dbg | |
98 | #define dbg(lvl, format, arg...) do { if (debug >= lvl) printk(KERN_DEBUG __FILE__ ": " format "\n", ## arg); } while (0) | |
99 | ||
100 | ||
101 | /* Version Information */ | |
102 | #define DRIVER_VERSION "v0.96" | |
103 | #define DRIVER_AUTHOR "Juergen Stuber <starblue@sourceforge.net>" | |
104 | #define DRIVER_DESC "LEGO USB Tower Driver" | |
105 | ||
106 | /* Module parameters */ | |
107 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
108 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
109 | ||
110 | /* The defaults are chosen to work with the latest versions of leJOS and NQC. | |
111 | */ | |
112 | ||
113 | /* Some legacy software likes to receive packets in one piece. | |
114 | * In this case read_buffer_size should exceed the maximal packet length | |
115 | * (417 for datalog uploads), and packet_timeout should be set. | |
116 | */ | |
117 | static int read_buffer_size = 480; | |
118 | module_param(read_buffer_size, int, 0); | |
119 | MODULE_PARM_DESC(read_buffer_size, "Read buffer size"); | |
120 | ||
121 | /* Some legacy software likes to send packets in one piece. | |
122 | * In this case write_buffer_size should exceed the maximal packet length | |
123 | * (417 for firmware and program downloads). | |
124 | * A problem with long writes is that the following read may time out | |
125 | * if the software is not prepared to wait long enough. | |
126 | */ | |
127 | static int write_buffer_size = 480; | |
128 | module_param(write_buffer_size, int, 0); | |
129 | MODULE_PARM_DESC(write_buffer_size, "Write buffer size"); | |
130 | ||
131 | /* Some legacy software expects reads to contain whole LASM packets. | |
132 | * To achieve this, characters which arrive before a packet timeout | |
133 | * occurs will be returned in a single read operation. | |
134 | * A problem with long reads is that the software may time out | |
135 | * if it is not prepared to wait long enough. | |
136 | * The packet timeout should be greater than the time between the | |
137 | * reception of subsequent characters, which should arrive about | |
138 | * every 5ms for the standard 2400 baud. | |
139 | * Set it to 0 to disable. | |
140 | */ | |
141 | static int packet_timeout = 50; | |
142 | module_param(packet_timeout, int, 0); | |
143 | MODULE_PARM_DESC(packet_timeout, "Packet timeout in ms"); | |
144 | ||
145 | /* Some legacy software expects blocking reads to time out. | |
146 | * Timeout occurs after the specified time of read and write inactivity. | |
147 | * Set it to 0 to disable. | |
148 | */ | |
149 | static int read_timeout = 200; | |
150 | module_param(read_timeout, int, 0); | |
151 | MODULE_PARM_DESC(read_timeout, "Read timeout in ms"); | |
152 | ||
153 | /* As of kernel version 2.6.4 ehci-hcd uses an | |
154 | * "only one interrupt transfer per frame" shortcut | |
155 | * to simplify the scheduling of periodic transfers. | |
156 | * This conflicts with our standard 1ms intervals for in and out URBs. | |
157 | * We use default intervals of 2ms for in and 8ms for out transfers, | |
158 | * which is fast enough for 2400 baud and allows a small additional load. | |
159 | * Increase the interval to allow more devices that do interrupt transfers, | |
160 | * or set to 0 to use the standard interval from the endpoint descriptors. | |
161 | */ | |
162 | static int interrupt_in_interval = 2; | |
163 | module_param(interrupt_in_interval, int, 0); | |
164 | MODULE_PARM_DESC(interrupt_in_interval, "Interrupt in interval in ms"); | |
165 | ||
166 | static int interrupt_out_interval = 8; | |
167 | module_param(interrupt_out_interval, int, 0); | |
168 | MODULE_PARM_DESC(interrupt_out_interval, "Interrupt out interval in ms"); | |
169 | ||
170 | /* Define these values to match your device */ | |
171 | #define LEGO_USB_TOWER_VENDOR_ID 0x0694 | |
172 | #define LEGO_USB_TOWER_PRODUCT_ID 0x0001 | |
173 | ||
174 | /* Vendor requests */ | |
175 | #define LEGO_USB_TOWER_REQUEST_RESET 0x04 | |
176 | #define LEGO_USB_TOWER_REQUEST_GET_VERSION 0xFD | |
177 | ||
178 | struct tower_reset_reply { | |
179 | __le16 size; /* little-endian */ | |
180 | __u8 err_code; | |
181 | __u8 spare; | |
182 | } __attribute__ ((packed)); | |
183 | ||
184 | struct tower_get_version_reply { | |
185 | __le16 size; /* little-endian */ | |
186 | __u8 err_code; | |
187 | __u8 spare; | |
188 | __u8 major; | |
189 | __u8 minor; | |
190 | __le16 build_no; /* little-endian */ | |
191 | } __attribute__ ((packed)); | |
192 | ||
193 | ||
194 | /* table of devices that work with this driver */ | |
195 | static struct usb_device_id tower_table [] = { | |
196 | { USB_DEVICE(LEGO_USB_TOWER_VENDOR_ID, LEGO_USB_TOWER_PRODUCT_ID) }, | |
197 | { } /* Terminating entry */ | |
198 | }; | |
199 | ||
200 | MODULE_DEVICE_TABLE (usb, tower_table); | |
78663ecc | 201 | static DEFINE_MUTEX(open_disc_mutex); |
1da177e4 LT |
202 | |
203 | #define LEGO_USB_TOWER_MINOR_BASE 160 | |
204 | ||
205 | ||
206 | /* Structure to hold all of our device specific stuff */ | |
207 | struct lego_usb_tower { | |
18bcbcfe | 208 | struct mutex lock; /* locks this structure */ |
1da177e4 LT |
209 | struct usb_device* udev; /* save off the usb device pointer */ |
210 | unsigned char minor; /* the starting minor number for this device */ | |
211 | ||
212 | int open_count; /* number of times this port has been opened */ | |
213 | ||
214 | char* read_buffer; | |
215 | size_t read_buffer_length; /* this much came in */ | |
216 | size_t read_packet_length; /* this much will be returned on read */ | |
217 | spinlock_t read_buffer_lock; | |
218 | int packet_timeout_jiffies; | |
219 | unsigned long read_last_arrival; | |
220 | ||
221 | wait_queue_head_t read_wait; | |
222 | wait_queue_head_t write_wait; | |
223 | ||
224 | char* interrupt_in_buffer; | |
225 | struct usb_endpoint_descriptor* interrupt_in_endpoint; | |
226 | struct urb* interrupt_in_urb; | |
227 | int interrupt_in_interval; | |
228 | int interrupt_in_running; | |
229 | int interrupt_in_done; | |
230 | ||
231 | char* interrupt_out_buffer; | |
232 | struct usb_endpoint_descriptor* interrupt_out_endpoint; | |
233 | struct urb* interrupt_out_urb; | |
234 | int interrupt_out_interval; | |
235 | int interrupt_out_busy; | |
236 | ||
237 | }; | |
238 | ||
239 | ||
240 | /* local function prototypes */ | |
241 | static ssize_t tower_read (struct file *file, char __user *buffer, size_t count, loff_t *ppos); | |
242 | static ssize_t tower_write (struct file *file, const char __user *buffer, size_t count, loff_t *ppos); | |
243 | static inline void tower_delete (struct lego_usb_tower *dev); | |
244 | static int tower_open (struct inode *inode, struct file *file); | |
245 | static int tower_release (struct inode *inode, struct file *file); | |
246 | static unsigned int tower_poll (struct file *file, poll_table *wait); | |
247 | static loff_t tower_llseek (struct file *file, loff_t off, int whence); | |
248 | ||
249 | static void tower_abort_transfers (struct lego_usb_tower *dev); | |
250 | static void tower_check_for_read_packet (struct lego_usb_tower *dev); | |
7d12e780 DH |
251 | static void tower_interrupt_in_callback (struct urb *urb); |
252 | static void tower_interrupt_out_callback (struct urb *urb); | |
1da177e4 LT |
253 | |
254 | static int tower_probe (struct usb_interface *interface, const struct usb_device_id *id); | |
255 | static void tower_disconnect (struct usb_interface *interface); | |
256 | ||
257 | ||
1da177e4 | 258 | /* file operations needed when we register this driver */ |
066202dd | 259 | static const struct file_operations tower_fops = { |
1da177e4 LT |
260 | .owner = THIS_MODULE, |
261 | .read = tower_read, | |
262 | .write = tower_write, | |
263 | .open = tower_open, | |
264 | .release = tower_release, | |
265 | .poll = tower_poll, | |
266 | .llseek = tower_llseek, | |
267 | }; | |
268 | ||
269 | /* | |
270 | * usb class driver info in order to get a minor number from the usb core, | |
d6e5bcf4 | 271 | * and to have the device registered with the driver core |
1da177e4 LT |
272 | */ |
273 | static struct usb_class_driver tower_class = { | |
d6e5bcf4 | 274 | .name = "legousbtower%d", |
1da177e4 | 275 | .fops = &tower_fops, |
1da177e4 LT |
276 | .minor_base = LEGO_USB_TOWER_MINOR_BASE, |
277 | }; | |
278 | ||
279 | ||
280 | /* usb specific object needed to register this driver with the usb subsystem */ | |
281 | static struct usb_driver tower_driver = { | |
1da177e4 LT |
282 | .name = "legousbtower", |
283 | .probe = tower_probe, | |
284 | .disconnect = tower_disconnect, | |
285 | .id_table = tower_table, | |
286 | }; | |
287 | ||
288 | ||
289 | /** | |
290 | * lego_usb_tower_debug_data | |
291 | */ | |
292 | static inline void lego_usb_tower_debug_data (int level, const char *function, int size, const unsigned char *data) | |
293 | { | |
294 | int i; | |
295 | ||
296 | if (debug < level) | |
297 | return; | |
298 | ||
299 | printk (KERN_DEBUG __FILE__": %s - length = %d, data = ", function, size); | |
300 | for (i = 0; i < size; ++i) { | |
301 | printk ("%.2x ", data[i]); | |
302 | } | |
303 | printk ("\n"); | |
304 | } | |
305 | ||
306 | ||
307 | /** | |
308 | * tower_delete | |
309 | */ | |
310 | static inline void tower_delete (struct lego_usb_tower *dev) | |
311 | { | |
441b62c1 | 312 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
313 | |
314 | tower_abort_transfers (dev); | |
315 | ||
316 | /* free data structures */ | |
f53510e8 MK |
317 | usb_free_urb(dev->interrupt_in_urb); |
318 | usb_free_urb(dev->interrupt_out_urb); | |
1da177e4 LT |
319 | kfree (dev->read_buffer); |
320 | kfree (dev->interrupt_in_buffer); | |
321 | kfree (dev->interrupt_out_buffer); | |
322 | kfree (dev); | |
323 | ||
441b62c1 | 324 | dbg(2, "%s: leave", __func__); |
1da177e4 LT |
325 | } |
326 | ||
327 | ||
328 | /** | |
329 | * tower_open | |
330 | */ | |
331 | static int tower_open (struct inode *inode, struct file *file) | |
332 | { | |
333 | struct lego_usb_tower *dev = NULL; | |
334 | int subminor; | |
335 | int retval = 0; | |
336 | struct usb_interface *interface; | |
337 | struct tower_reset_reply reset_reply; | |
338 | int result; | |
339 | ||
441b62c1 | 340 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
341 | |
342 | nonseekable_open(inode, file); | |
343 | subminor = iminor(inode); | |
344 | ||
1da177e4 LT |
345 | interface = usb_find_interface (&tower_driver, subminor); |
346 | ||
347 | if (!interface) { | |
348 | err ("%s - error, can't find device for minor %d", | |
441b62c1 | 349 | __func__, subminor); |
1da177e4 | 350 | retval = -ENODEV; |
d4ead16f | 351 | goto exit; |
1da177e4 LT |
352 | } |
353 | ||
78663ecc | 354 | mutex_lock(&open_disc_mutex); |
1da177e4 LT |
355 | dev = usb_get_intfdata(interface); |
356 | ||
357 | if (!dev) { | |
78663ecc | 358 | mutex_unlock(&open_disc_mutex); |
1da177e4 | 359 | retval = -ENODEV; |
d4ead16f | 360 | goto exit; |
1da177e4 LT |
361 | } |
362 | ||
363 | /* lock this device */ | |
18bcbcfe | 364 | if (mutex_lock_interruptible(&dev->lock)) { |
78663ecc | 365 | mutex_unlock(&open_disc_mutex); |
1da177e4 | 366 | retval = -ERESTARTSYS; |
d4ead16f | 367 | goto exit; |
1da177e4 LT |
368 | } |
369 | ||
78663ecc | 370 | |
1da177e4 LT |
371 | /* allow opening only once */ |
372 | if (dev->open_count) { | |
78663ecc | 373 | mutex_unlock(&open_disc_mutex); |
1da177e4 LT |
374 | retval = -EBUSY; |
375 | goto unlock_exit; | |
376 | } | |
377 | dev->open_count = 1; | |
78663ecc | 378 | mutex_unlock(&open_disc_mutex); |
1da177e4 LT |
379 | |
380 | /* reset the tower */ | |
381 | result = usb_control_msg (dev->udev, | |
382 | usb_rcvctrlpipe(dev->udev, 0), | |
383 | LEGO_USB_TOWER_REQUEST_RESET, | |
384 | USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, | |
385 | 0, | |
386 | 0, | |
387 | &reset_reply, | |
388 | sizeof(reset_reply), | |
389 | 1000); | |
390 | if (result < 0) { | |
391 | err("LEGO USB Tower reset control request failed"); | |
392 | retval = result; | |
393 | goto unlock_exit; | |
394 | } | |
395 | ||
396 | /* initialize in direction */ | |
397 | dev->read_buffer_length = 0; | |
398 | dev->read_packet_length = 0; | |
399 | usb_fill_int_urb (dev->interrupt_in_urb, | |
400 | dev->udev, | |
401 | usb_rcvintpipe(dev->udev, dev->interrupt_in_endpoint->bEndpointAddress), | |
402 | dev->interrupt_in_buffer, | |
403 | le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize), | |
404 | tower_interrupt_in_callback, | |
405 | dev, | |
406 | dev->interrupt_in_interval); | |
407 | ||
408 | dev->interrupt_in_running = 1; | |
409 | dev->interrupt_in_done = 0; | |
410 | mb(); | |
411 | ||
412 | retval = usb_submit_urb (dev->interrupt_in_urb, GFP_KERNEL); | |
413 | if (retval) { | |
414 | err("Couldn't submit interrupt_in_urb %d", retval); | |
415 | dev->interrupt_in_running = 0; | |
416 | dev->open_count = 0; | |
417 | goto unlock_exit; | |
418 | } | |
419 | ||
420 | /* save device in the file's private structure */ | |
421 | file->private_data = dev; | |
422 | ||
423 | unlock_exit: | |
18bcbcfe | 424 | mutex_unlock(&dev->lock); |
1da177e4 | 425 | |
d4ead16f | 426 | exit: |
441b62c1 | 427 | dbg(2, "%s: leave, return value %d ", __func__, retval); |
1da177e4 LT |
428 | |
429 | return retval; | |
430 | } | |
431 | ||
432 | /** | |
433 | * tower_release | |
434 | */ | |
435 | static int tower_release (struct inode *inode, struct file *file) | |
436 | { | |
437 | struct lego_usb_tower *dev; | |
438 | int retval = 0; | |
439 | ||
441b62c1 | 440 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
441 | |
442 | dev = (struct lego_usb_tower *)file->private_data; | |
443 | ||
444 | if (dev == NULL) { | |
441b62c1 | 445 | dbg(1, "%s: object is NULL", __func__); |
1da177e4 | 446 | retval = -ENODEV; |
78663ecc | 447 | goto exit_nolock; |
1da177e4 LT |
448 | } |
449 | ||
78663ecc | 450 | mutex_lock(&open_disc_mutex); |
18bcbcfe | 451 | if (mutex_lock_interruptible(&dev->lock)) { |
1da177e4 LT |
452 | retval = -ERESTARTSYS; |
453 | goto exit; | |
454 | } | |
455 | ||
456 | if (dev->open_count != 1) { | |
441b62c1 | 457 | dbg(1, "%s: device not opened exactly once", __func__); |
1da177e4 LT |
458 | retval = -ENODEV; |
459 | goto unlock_exit; | |
460 | } | |
461 | if (dev->udev == NULL) { | |
462 | /* the device was unplugged before the file was released */ | |
18bcbcfe DW |
463 | |
464 | /* unlock here as tower_delete frees dev */ | |
465 | mutex_unlock(&dev->lock); | |
1da177e4 LT |
466 | tower_delete (dev); |
467 | goto exit; | |
468 | } | |
469 | ||
470 | /* wait until write transfer is finished */ | |
471 | if (dev->interrupt_out_busy) { | |
472 | wait_event_interruptible_timeout (dev->write_wait, !dev->interrupt_out_busy, 2 * HZ); | |
473 | } | |
474 | tower_abort_transfers (dev); | |
475 | dev->open_count = 0; | |
476 | ||
477 | unlock_exit: | |
18bcbcfe | 478 | mutex_unlock(&dev->lock); |
1da177e4 LT |
479 | |
480 | exit: | |
78663ecc ON |
481 | mutex_unlock(&open_disc_mutex); |
482 | exit_nolock: | |
441b62c1 | 483 | dbg(2, "%s: leave, return value %d", __func__, retval); |
1da177e4 LT |
484 | return retval; |
485 | } | |
486 | ||
487 | ||
488 | /** | |
489 | * tower_abort_transfers | |
490 | * aborts transfers and frees associated data structures | |
491 | */ | |
492 | static void tower_abort_transfers (struct lego_usb_tower *dev) | |
493 | { | |
441b62c1 | 494 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
495 | |
496 | if (dev == NULL) { | |
441b62c1 | 497 | dbg(1, "%s: dev is null", __func__); |
1da177e4 LT |
498 | goto exit; |
499 | } | |
500 | ||
501 | /* shutdown transfer */ | |
502 | if (dev->interrupt_in_running) { | |
503 | dev->interrupt_in_running = 0; | |
504 | mb(); | |
f53510e8 | 505 | if (dev->udev) |
1da177e4 | 506 | usb_kill_urb (dev->interrupt_in_urb); |
1da177e4 | 507 | } |
f53510e8 MK |
508 | if (dev->interrupt_out_busy && dev->udev) |
509 | usb_kill_urb(dev->interrupt_out_urb); | |
1da177e4 LT |
510 | |
511 | exit: | |
441b62c1 | 512 | dbg(2, "%s: leave", __func__); |
1da177e4 LT |
513 | } |
514 | ||
515 | ||
516 | /** | |
517 | * tower_check_for_read_packet | |
518 | * | |
519 | * To get correct semantics for signals and non-blocking I/O | |
520 | * with packetizing we pretend not to see any data in the read buffer | |
521 | * until it has been there unchanged for at least | |
522 | * dev->packet_timeout_jiffies, or until the buffer is full. | |
523 | */ | |
524 | static void tower_check_for_read_packet (struct lego_usb_tower *dev) | |
525 | { | |
526 | spin_lock_irq (&dev->read_buffer_lock); | |
527 | if (!packet_timeout | |
528 | || time_after(jiffies, dev->read_last_arrival + dev->packet_timeout_jiffies) | |
529 | || dev->read_buffer_length == read_buffer_size) { | |
530 | dev->read_packet_length = dev->read_buffer_length; | |
531 | } | |
532 | dev->interrupt_in_done = 0; | |
533 | spin_unlock_irq (&dev->read_buffer_lock); | |
534 | } | |
535 | ||
536 | ||
537 | /** | |
538 | * tower_poll | |
539 | */ | |
540 | static unsigned int tower_poll (struct file *file, poll_table *wait) | |
541 | { | |
542 | struct lego_usb_tower *dev; | |
543 | unsigned int mask = 0; | |
544 | ||
441b62c1 | 545 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
546 | |
547 | dev = file->private_data; | |
548 | ||
549 | poll_wait(file, &dev->read_wait, wait); | |
550 | poll_wait(file, &dev->write_wait, wait); | |
551 | ||
552 | tower_check_for_read_packet(dev); | |
553 | if (dev->read_packet_length > 0) { | |
554 | mask |= POLLIN | POLLRDNORM; | |
555 | } | |
556 | if (!dev->interrupt_out_busy) { | |
557 | mask |= POLLOUT | POLLWRNORM; | |
558 | } | |
559 | ||
441b62c1 | 560 | dbg(2, "%s: leave, mask = %d", __func__, mask); |
1da177e4 LT |
561 | |
562 | return mask; | |
563 | } | |
564 | ||
565 | ||
566 | /** | |
567 | * tower_llseek | |
568 | */ | |
569 | static loff_t tower_llseek (struct file *file, loff_t off, int whence) | |
570 | { | |
571 | return -ESPIPE; /* unseekable */ | |
572 | } | |
573 | ||
574 | ||
575 | /** | |
576 | * tower_read | |
577 | */ | |
578 | static ssize_t tower_read (struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
579 | { | |
580 | struct lego_usb_tower *dev; | |
581 | size_t bytes_to_read; | |
582 | int i; | |
583 | int retval = 0; | |
584 | unsigned long timeout = 0; | |
585 | ||
441b62c1 | 586 | dbg(2, "%s: enter, count = %Zd", __func__, count); |
1da177e4 LT |
587 | |
588 | dev = (struct lego_usb_tower *)file->private_data; | |
589 | ||
590 | /* lock this object */ | |
18bcbcfe | 591 | if (mutex_lock_interruptible(&dev->lock)) { |
1da177e4 LT |
592 | retval = -ERESTARTSYS; |
593 | goto exit; | |
594 | } | |
595 | ||
596 | /* verify that the device wasn't unplugged */ | |
597 | if (dev->udev == NULL) { | |
598 | retval = -ENODEV; | |
599 | err("No device or device unplugged %d", retval); | |
600 | goto unlock_exit; | |
601 | } | |
602 | ||
603 | /* verify that we actually have some data to read */ | |
604 | if (count == 0) { | |
441b62c1 | 605 | dbg(1, "%s: read request of 0 bytes", __func__); |
1da177e4 LT |
606 | goto unlock_exit; |
607 | } | |
608 | ||
609 | if (read_timeout) { | |
610 | timeout = jiffies + read_timeout * HZ / 1000; | |
611 | } | |
612 | ||
613 | /* wait for data */ | |
614 | tower_check_for_read_packet (dev); | |
615 | while (dev->read_packet_length == 0) { | |
616 | if (file->f_flags & O_NONBLOCK) { | |
617 | retval = -EAGAIN; | |
618 | goto unlock_exit; | |
619 | } | |
620 | retval = wait_event_interruptible_timeout(dev->read_wait, dev->interrupt_in_done, dev->packet_timeout_jiffies); | |
621 | if (retval < 0) { | |
622 | goto unlock_exit; | |
623 | } | |
624 | ||
625 | /* reset read timeout during read or write activity */ | |
626 | if (read_timeout | |
627 | && (dev->read_buffer_length || dev->interrupt_out_busy)) { | |
628 | timeout = jiffies + read_timeout * HZ / 1000; | |
629 | } | |
630 | /* check for read timeout */ | |
631 | if (read_timeout && time_after (jiffies, timeout)) { | |
632 | retval = -ETIMEDOUT; | |
633 | goto unlock_exit; | |
634 | } | |
635 | tower_check_for_read_packet (dev); | |
636 | } | |
637 | ||
638 | /* copy the data from read_buffer into userspace */ | |
639 | bytes_to_read = min(count, dev->read_packet_length); | |
640 | ||
641 | if (copy_to_user (buffer, dev->read_buffer, bytes_to_read)) { | |
642 | retval = -EFAULT; | |
643 | goto unlock_exit; | |
644 | } | |
645 | ||
646 | spin_lock_irq (&dev->read_buffer_lock); | |
647 | dev->read_buffer_length -= bytes_to_read; | |
648 | dev->read_packet_length -= bytes_to_read; | |
649 | for (i=0; i<dev->read_buffer_length; i++) { | |
650 | dev->read_buffer[i] = dev->read_buffer[i+bytes_to_read]; | |
651 | } | |
652 | spin_unlock_irq (&dev->read_buffer_lock); | |
653 | ||
654 | retval = bytes_to_read; | |
655 | ||
656 | unlock_exit: | |
657 | /* unlock the device */ | |
18bcbcfe | 658 | mutex_unlock(&dev->lock); |
1da177e4 LT |
659 | |
660 | exit: | |
441b62c1 | 661 | dbg(2, "%s: leave, return value %d", __func__, retval); |
1da177e4 LT |
662 | return retval; |
663 | } | |
664 | ||
665 | ||
666 | /** | |
667 | * tower_write | |
668 | */ | |
669 | static ssize_t tower_write (struct file *file, const char __user *buffer, size_t count, loff_t *ppos) | |
670 | { | |
671 | struct lego_usb_tower *dev; | |
672 | size_t bytes_to_write; | |
673 | int retval = 0; | |
674 | ||
441b62c1 | 675 | dbg(2, "%s: enter, count = %Zd", __func__, count); |
1da177e4 LT |
676 | |
677 | dev = (struct lego_usb_tower *)file->private_data; | |
678 | ||
679 | /* lock this object */ | |
18bcbcfe | 680 | if (mutex_lock_interruptible(&dev->lock)) { |
1da177e4 LT |
681 | retval = -ERESTARTSYS; |
682 | goto exit; | |
683 | } | |
684 | ||
685 | /* verify that the device wasn't unplugged */ | |
686 | if (dev->udev == NULL) { | |
687 | retval = -ENODEV; | |
688 | err("No device or device unplugged %d", retval); | |
689 | goto unlock_exit; | |
690 | } | |
691 | ||
692 | /* verify that we actually have some data to write */ | |
693 | if (count == 0) { | |
441b62c1 | 694 | dbg(1, "%s: write request of 0 bytes", __func__); |
1da177e4 LT |
695 | goto unlock_exit; |
696 | } | |
697 | ||
698 | /* wait until previous transfer is finished */ | |
699 | while (dev->interrupt_out_busy) { | |
700 | if (file->f_flags & O_NONBLOCK) { | |
701 | retval = -EAGAIN; | |
702 | goto unlock_exit; | |
703 | } | |
704 | retval = wait_event_interruptible (dev->write_wait, !dev->interrupt_out_busy); | |
705 | if (retval) { | |
706 | goto unlock_exit; | |
707 | } | |
708 | } | |
709 | ||
710 | /* write the data into interrupt_out_buffer from userspace */ | |
711 | bytes_to_write = min_t(int, count, write_buffer_size); | |
441b62c1 | 712 | dbg(4, "%s: count = %Zd, bytes_to_write = %Zd", __func__, count, bytes_to_write); |
1da177e4 LT |
713 | |
714 | if (copy_from_user (dev->interrupt_out_buffer, buffer, bytes_to_write)) { | |
715 | retval = -EFAULT; | |
716 | goto unlock_exit; | |
717 | } | |
718 | ||
719 | /* send off the urb */ | |
720 | usb_fill_int_urb(dev->interrupt_out_urb, | |
721 | dev->udev, | |
722 | usb_sndintpipe(dev->udev, dev->interrupt_out_endpoint->bEndpointAddress), | |
723 | dev->interrupt_out_buffer, | |
724 | bytes_to_write, | |
725 | tower_interrupt_out_callback, | |
726 | dev, | |
727 | dev->interrupt_out_interval); | |
728 | ||
729 | dev->interrupt_out_busy = 1; | |
730 | wmb(); | |
731 | ||
732 | retval = usb_submit_urb (dev->interrupt_out_urb, GFP_KERNEL); | |
733 | if (retval) { | |
734 | dev->interrupt_out_busy = 0; | |
735 | err("Couldn't submit interrupt_out_urb %d", retval); | |
736 | goto unlock_exit; | |
737 | } | |
738 | retval = bytes_to_write; | |
739 | ||
740 | unlock_exit: | |
741 | /* unlock the device */ | |
18bcbcfe | 742 | mutex_unlock(&dev->lock); |
1da177e4 LT |
743 | |
744 | exit: | |
441b62c1 | 745 | dbg(2, "%s: leave, return value %d", __func__, retval); |
1da177e4 LT |
746 | |
747 | return retval; | |
748 | } | |
749 | ||
750 | ||
751 | /** | |
752 | * tower_interrupt_in_callback | |
753 | */ | |
7d12e780 | 754 | static void tower_interrupt_in_callback (struct urb *urb) |
1da177e4 LT |
755 | { |
756 | struct lego_usb_tower *dev = (struct lego_usb_tower *)urb->context; | |
64771a0f | 757 | int status = urb->status; |
1da177e4 LT |
758 | int retval; |
759 | ||
441b62c1 | 760 | dbg(4, "%s: enter, status %d", __func__, status); |
1da177e4 | 761 | |
441b62c1 | 762 | lego_usb_tower_debug_data(5, __func__, urb->actual_length, urb->transfer_buffer); |
1da177e4 | 763 | |
64771a0f GKH |
764 | if (status) { |
765 | if (status == -ENOENT || | |
766 | status == -ECONNRESET || | |
767 | status == -ESHUTDOWN) { | |
1da177e4 LT |
768 | goto exit; |
769 | } else { | |
441b62c1 | 770 | dbg(1, "%s: nonzero status received: %d", __func__, status); |
1da177e4 LT |
771 | goto resubmit; /* maybe we can recover */ |
772 | } | |
773 | } | |
774 | ||
775 | if (urb->actual_length > 0) { | |
776 | spin_lock (&dev->read_buffer_lock); | |
777 | if (dev->read_buffer_length + urb->actual_length < read_buffer_size) { | |
778 | memcpy (dev->read_buffer + dev->read_buffer_length, | |
779 | dev->interrupt_in_buffer, | |
780 | urb->actual_length); | |
781 | dev->read_buffer_length += urb->actual_length; | |
782 | dev->read_last_arrival = jiffies; | |
441b62c1 | 783 | dbg(3, "%s: received %d bytes", __func__, urb->actual_length); |
1da177e4 | 784 | } else { |
441b62c1 | 785 | printk(KERN_WARNING "%s: read_buffer overflow, %d bytes dropped", __func__, urb->actual_length); |
1da177e4 LT |
786 | } |
787 | spin_unlock (&dev->read_buffer_lock); | |
788 | } | |
789 | ||
790 | resubmit: | |
791 | /* resubmit if we're still running */ | |
792 | if (dev->interrupt_in_running && dev->udev) { | |
793 | retval = usb_submit_urb (dev->interrupt_in_urb, GFP_ATOMIC); | |
794 | if (retval) { | |
441b62c1 | 795 | err("%s: usb_submit_urb failed (%d)", __func__, retval); |
1da177e4 LT |
796 | } |
797 | } | |
798 | ||
799 | exit: | |
800 | dev->interrupt_in_done = 1; | |
801 | wake_up_interruptible (&dev->read_wait); | |
802 | ||
441b62c1 HH |
803 | lego_usb_tower_debug_data(5, __func__, urb->actual_length, urb->transfer_buffer); |
804 | dbg(4, "%s: leave, status %d", __func__, status); | |
1da177e4 LT |
805 | } |
806 | ||
807 | ||
808 | /** | |
809 | * tower_interrupt_out_callback | |
810 | */ | |
7d12e780 | 811 | static void tower_interrupt_out_callback (struct urb *urb) |
1da177e4 LT |
812 | { |
813 | struct lego_usb_tower *dev = (struct lego_usb_tower *)urb->context; | |
64771a0f | 814 | int status = urb->status; |
1da177e4 | 815 | |
441b62c1 HH |
816 | dbg(4, "%s: enter, status %d", __func__, status); |
817 | lego_usb_tower_debug_data(5, __func__, urb->actual_length, urb->transfer_buffer); | |
1da177e4 LT |
818 | |
819 | /* sync/async unlink faults aren't errors */ | |
64771a0f GKH |
820 | if (status && !(status == -ENOENT || |
821 | status == -ECONNRESET || | |
822 | status == -ESHUTDOWN)) { | |
1da177e4 | 823 | dbg(1, "%s - nonzero write bulk status received: %d", |
441b62c1 | 824 | __func__, status); |
1da177e4 LT |
825 | } |
826 | ||
827 | dev->interrupt_out_busy = 0; | |
828 | wake_up_interruptible(&dev->write_wait); | |
829 | ||
441b62c1 HH |
830 | lego_usb_tower_debug_data(5, __func__, urb->actual_length, urb->transfer_buffer); |
831 | dbg(4, "%s: leave, status %d", __func__, status); | |
1da177e4 LT |
832 | } |
833 | ||
834 | ||
835 | /** | |
836 | * tower_probe | |
837 | * | |
838 | * Called by the usb core when a new device is connected that it thinks | |
839 | * this driver might be interested in. | |
840 | */ | |
841 | static int tower_probe (struct usb_interface *interface, const struct usb_device_id *id) | |
842 | { | |
843 | struct usb_device *udev = interface_to_usbdev(interface); | |
844 | struct lego_usb_tower *dev = NULL; | |
845 | struct usb_host_interface *iface_desc; | |
846 | struct usb_endpoint_descriptor* endpoint; | |
847 | struct tower_get_version_reply get_version_reply; | |
848 | int i; | |
849 | int retval = -ENOMEM; | |
850 | int result; | |
851 | ||
441b62c1 | 852 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
853 | |
854 | if (udev == NULL) { | |
855 | info ("udev is NULL."); | |
856 | } | |
857 | ||
093cf723 | 858 | /* allocate memory for our device state and initialize it */ |
1da177e4 LT |
859 | |
860 | dev = kmalloc (sizeof(struct lego_usb_tower), GFP_KERNEL); | |
861 | ||
862 | if (dev == NULL) { | |
863 | err ("Out of memory"); | |
864 | goto exit; | |
865 | } | |
866 | ||
18bcbcfe | 867 | mutex_init(&dev->lock); |
1da177e4 LT |
868 | |
869 | dev->udev = udev; | |
870 | dev->open_count = 0; | |
871 | ||
872 | dev->read_buffer = NULL; | |
873 | dev->read_buffer_length = 0; | |
874 | dev->read_packet_length = 0; | |
875 | spin_lock_init (&dev->read_buffer_lock); | |
876 | dev->packet_timeout_jiffies = packet_timeout * HZ / 1000; | |
877 | dev->read_last_arrival = jiffies; | |
878 | ||
879 | init_waitqueue_head (&dev->read_wait); | |
880 | init_waitqueue_head (&dev->write_wait); | |
881 | ||
882 | dev->interrupt_in_buffer = NULL; | |
883 | dev->interrupt_in_endpoint = NULL; | |
884 | dev->interrupt_in_urb = NULL; | |
885 | dev->interrupt_in_running = 0; | |
886 | dev->interrupt_in_done = 0; | |
887 | ||
888 | dev->interrupt_out_buffer = NULL; | |
889 | dev->interrupt_out_endpoint = NULL; | |
890 | dev->interrupt_out_urb = NULL; | |
891 | dev->interrupt_out_busy = 0; | |
892 | ||
893 | iface_desc = interface->cur_altsetting; | |
894 | ||
895 | /* set up the endpoint information */ | |
896 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
897 | endpoint = &iface_desc->endpoint[i].desc; | |
898 | ||
240661c5 LFC |
899 | if (usb_endpoint_xfer_int(endpoint)) { |
900 | if (usb_endpoint_dir_in(endpoint)) | |
901 | dev->interrupt_in_endpoint = endpoint; | |
902 | else | |
903 | dev->interrupt_out_endpoint = endpoint; | |
1da177e4 LT |
904 | } |
905 | } | |
906 | if(dev->interrupt_in_endpoint == NULL) { | |
907 | err("interrupt in endpoint not found"); | |
908 | goto error; | |
909 | } | |
910 | if (dev->interrupt_out_endpoint == NULL) { | |
911 | err("interrupt out endpoint not found"); | |
912 | goto error; | |
913 | } | |
914 | ||
915 | dev->read_buffer = kmalloc (read_buffer_size, GFP_KERNEL); | |
916 | if (!dev->read_buffer) { | |
917 | err("Couldn't allocate read_buffer"); | |
918 | goto error; | |
919 | } | |
920 | dev->interrupt_in_buffer = kmalloc (le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize), GFP_KERNEL); | |
921 | if (!dev->interrupt_in_buffer) { | |
922 | err("Couldn't allocate interrupt_in_buffer"); | |
923 | goto error; | |
924 | } | |
925 | dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
926 | if (!dev->interrupt_in_urb) { | |
927 | err("Couldn't allocate interrupt_in_urb"); | |
928 | goto error; | |
929 | } | |
930 | dev->interrupt_out_buffer = kmalloc (write_buffer_size, GFP_KERNEL); | |
931 | if (!dev->interrupt_out_buffer) { | |
932 | err("Couldn't allocate interrupt_out_buffer"); | |
933 | goto error; | |
934 | } | |
935 | dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
936 | if (!dev->interrupt_out_urb) { | |
937 | err("Couldn't allocate interrupt_out_urb"); | |
938 | goto error; | |
939 | } | |
940 | dev->interrupt_in_interval = interrupt_in_interval ? interrupt_in_interval : dev->interrupt_in_endpoint->bInterval; | |
941 | dev->interrupt_out_interval = interrupt_out_interval ? interrupt_out_interval : dev->interrupt_out_endpoint->bInterval; | |
942 | ||
943 | /* we can register the device now, as it is ready */ | |
944 | usb_set_intfdata (interface, dev); | |
945 | ||
946 | retval = usb_register_dev (interface, &tower_class); | |
947 | ||
948 | if (retval) { | |
949 | /* something prevented us from registering this driver */ | |
950 | err ("Not able to get a minor for this device."); | |
951 | usb_set_intfdata (interface, NULL); | |
952 | goto error; | |
953 | } | |
954 | dev->minor = interface->minor; | |
955 | ||
956 | /* let the user know what node this device is now attached to */ | |
957 | info ("LEGO USB Tower #%d now attached to major %d minor %d", (dev->minor - LEGO_USB_TOWER_MINOR_BASE), USB_MAJOR, dev->minor); | |
958 | ||
959 | /* get the firmware version and log it */ | |
960 | result = usb_control_msg (udev, | |
961 | usb_rcvctrlpipe(udev, 0), | |
962 | LEGO_USB_TOWER_REQUEST_GET_VERSION, | |
963 | USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, | |
964 | 0, | |
965 | 0, | |
966 | &get_version_reply, | |
967 | sizeof(get_version_reply), | |
968 | 1000); | |
969 | if (result < 0) { | |
970 | err("LEGO USB Tower get version control request failed"); | |
971 | retval = result; | |
972 | goto error; | |
973 | } | |
974 | info("LEGO USB Tower firmware version is %d.%d build %d", | |
975 | get_version_reply.major, | |
976 | get_version_reply.minor, | |
977 | le16_to_cpu(get_version_reply.build_no)); | |
978 | ||
979 | ||
980 | exit: | |
441b62c1 | 981 | dbg(2, "%s: leave, return value 0x%.8lx (dev)", __func__, (long) dev); |
1da177e4 LT |
982 | |
983 | return retval; | |
984 | ||
985 | error: | |
986 | tower_delete(dev); | |
987 | return retval; | |
988 | } | |
989 | ||
990 | ||
991 | /** | |
992 | * tower_disconnect | |
993 | * | |
994 | * Called by the usb core when the device is removed from the system. | |
995 | */ | |
996 | static void tower_disconnect (struct usb_interface *interface) | |
997 | { | |
998 | struct lego_usb_tower *dev; | |
999 | int minor; | |
1000 | ||
441b62c1 | 1001 | dbg(2, "%s: enter", __func__); |
1da177e4 | 1002 | |
1da177e4 | 1003 | dev = usb_get_intfdata (interface); |
78663ecc | 1004 | mutex_lock(&open_disc_mutex); |
1da177e4 LT |
1005 | usb_set_intfdata (interface, NULL); |
1006 | ||
1da177e4 LT |
1007 | minor = dev->minor; |
1008 | ||
1009 | /* give back our minor */ | |
1010 | usb_deregister_dev (interface, &tower_class); | |
1011 | ||
18bcbcfe | 1012 | mutex_lock(&dev->lock); |
78663ecc | 1013 | mutex_unlock(&open_disc_mutex); |
d4ead16f | 1014 | |
1da177e4 LT |
1015 | /* if the device is not opened, then we clean up right now */ |
1016 | if (!dev->open_count) { | |
18bcbcfe | 1017 | mutex_unlock(&dev->lock); |
1da177e4 LT |
1018 | tower_delete (dev); |
1019 | } else { | |
1020 | dev->udev = NULL; | |
18bcbcfe | 1021 | mutex_unlock(&dev->lock); |
1da177e4 LT |
1022 | } |
1023 | ||
1da177e4 LT |
1024 | info("LEGO USB Tower #%d now disconnected", (minor - LEGO_USB_TOWER_MINOR_BASE)); |
1025 | ||
441b62c1 | 1026 | dbg(2, "%s: leave", __func__); |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | ||
1030 | ||
1031 | /** | |
1032 | * lego_usb_tower_init | |
1033 | */ | |
1034 | static int __init lego_usb_tower_init(void) | |
1035 | { | |
1036 | int result; | |
1037 | int retval = 0; | |
1038 | ||
441b62c1 | 1039 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
1040 | |
1041 | /* register this driver with the USB subsystem */ | |
1042 | result = usb_register(&tower_driver); | |
1043 | if (result < 0) { | |
1044 | err("usb_register failed for the "__FILE__" driver. Error number %d", result); | |
1045 | retval = -1; | |
1046 | goto exit; | |
1047 | } | |
1048 | ||
1049 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1050 | ||
1051 | exit: | |
441b62c1 | 1052 | dbg(2, "%s: leave, return value %d", __func__, retval); |
1da177e4 LT |
1053 | |
1054 | return retval; | |
1055 | } | |
1056 | ||
1057 | ||
1058 | /** | |
1059 | * lego_usb_tower_exit | |
1060 | */ | |
1061 | static void __exit lego_usb_tower_exit(void) | |
1062 | { | |
441b62c1 | 1063 | dbg(2, "%s: enter", __func__); |
1da177e4 LT |
1064 | |
1065 | /* deregister this driver with the USB subsystem */ | |
1066 | usb_deregister (&tower_driver); | |
1067 | ||
441b62c1 | 1068 | dbg(2, "%s: leave", __func__); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | module_init (lego_usb_tower_init); | |
1072 | module_exit (lego_usb_tower_exit); | |
1073 | ||
1074 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1075 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1076 | #ifdef MODULE_LICENSE | |
1077 | MODULE_LICENSE("GPL"); | |
1078 | #endif |