Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
[linux-2.6] / drivers / net / wimax / i2400m / usb.c
1 /*
2  * Intel Wireless WiMAX Connection 2400m
3  * Linux driver model glue for USB device, reset & fw upload
4  *
5  *
6  * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
7  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
8  * Yanir Lubetkin <yanirx.lubetkin@intel.com>
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License version
12  * 2 as published by the Free Software Foundation.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22  * 02110-1301, USA.
23  *
24  *
25  * See i2400m-usb.h for a general description of this driver.
26  *
27  * This file implements driver model glue, and hook ups for the
28  * generic driver to implement the bus-specific functions (device
29  * communication setup/tear down, firmware upload and resetting).
30  *
31  * ROADMAP
32  *
33  * i2400mu_probe()
34  *   alloc_netdev()...
35  *     i2400mu_netdev_setup()
36  *       i2400mu_init()
37  *       i2400m_netdev_setup()
38  *   i2400m_setup()...
39  *
40  * i2400mu_disconnect
41  *   i2400m_release()
42  *   free_netdev()
43  *
44  * i2400mu_suspend()
45  *   i2400m_cmd_enter_powersave()
46  *   i2400mu_notification_release()
47  *
48  * i2400mu_resume()
49  *   i2400mu_notification_setup()
50  *
51  * i2400mu_bus_dev_start()        Called by i2400m_dev_start() [who is
52  *   i2400mu_tx_setup()           called by i2400m_setup()]
53  *   i2400mu_rx_setup()
54  *   i2400mu_notification_setup()
55  *
56  * i2400mu_bus_dev_stop()         Called by i2400m_dev_stop() [who is
57  *   i2400mu_notification_release()  called by i2400m_release()]
58  *   i2400mu_rx_release()
59  *   i2400mu_tx_release()
60  *
61  * i2400mu_bus_reset()            Called by i2400m->bus_reset
62  *   __i2400mu_reset()
63  *     __i2400mu_send_barker()
64  *   usb_reset_device()
65  */
66 #include "i2400m-usb.h"
67 #include <linux/wimax/i2400m.h>
68 #include <linux/debugfs.h>
69
70
71 #define D_SUBMODULE usb
72 #include "usb-debug-levels.h"
73
74
75 /* Our firmware file name */
76 static const char *i2400mu_bus_fw_names[] = {
77 #define I2400MU_FW_FILE_NAME_v1_4 "i2400m-fw-usb-1.4.sbcf"
78         I2400MU_FW_FILE_NAME_v1_4,
79 #define I2400MU_FW_FILE_NAME_v1_3 "i2400m-fw-usb-1.3.sbcf"
80         I2400MU_FW_FILE_NAME_v1_3,
81         NULL,
82 };
83
84
85 static
86 int i2400mu_bus_dev_start(struct i2400m *i2400m)
87 {
88         int result;
89         struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
90         struct device *dev = &i2400mu->usb_iface->dev;
91
92         d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
93         result = i2400mu_tx_setup(i2400mu);
94         if (result < 0)
95                 goto error_usb_tx_setup;
96         result = i2400mu_rx_setup(i2400mu);
97         if (result < 0)
98                 goto error_usb_rx_setup;
99         result = i2400mu_notification_setup(i2400mu);
100         if (result < 0)
101                 goto error_notif_setup;
102         d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
103         return result;
104
105 error_notif_setup:
106         i2400mu_rx_release(i2400mu);
107 error_usb_rx_setup:
108         i2400mu_tx_release(i2400mu);
109 error_usb_tx_setup:
110         d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
111         return result;
112 }
113
114
115 static
116 void i2400mu_bus_dev_stop(struct i2400m *i2400m)
117 {
118         struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
119         struct device *dev = &i2400mu->usb_iface->dev;
120
121         d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
122         i2400mu_notification_release(i2400mu);
123         i2400mu_rx_release(i2400mu);
124         i2400mu_tx_release(i2400mu);
125         d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
126 }
127
128
129 /*
130  * Sends a barker buffer to the device
131  *
132  * This helper will allocate a kmalloced buffer and use it to transmit
133  * (then free it). Reason for this is that other arches cannot use
134  * stack/vmalloc/text areas for DMA transfers.
135  *
136  * Error recovery here is simpler: anything is considered a hard error
137  * and will move the reset code to use a last-resort bus-based reset.
138  */
139 static
140 int __i2400mu_send_barker(struct i2400mu *i2400mu,
141                           const __le32 *barker,
142                           size_t barker_size,
143                           unsigned endpoint)
144 {
145         struct usb_endpoint_descriptor *epd = NULL;
146         int pipe, actual_len, ret;
147         struct device *dev = &i2400mu->usb_iface->dev;
148         void *buffer;
149         int do_autopm = 1;
150
151         ret = usb_autopm_get_interface(i2400mu->usb_iface);
152         if (ret < 0) {
153                 dev_err(dev, "RESET: can't get autopm: %d\n", ret);
154                 do_autopm = 0;
155         }
156         ret = -ENOMEM;
157         buffer = kmalloc(barker_size, GFP_KERNEL);
158         if (buffer == NULL)
159                 goto error_kzalloc;
160         epd = usb_get_epd(i2400mu->usb_iface, endpoint);
161         pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
162         memcpy(buffer, barker, barker_size);
163         ret = usb_bulk_msg(i2400mu->usb_dev, pipe, buffer, barker_size,
164                            &actual_len, HZ);
165         if (ret < 0) {
166                 if (ret != -EINVAL)
167                         dev_err(dev, "E: barker error: %d\n", ret);
168         } else if (actual_len != barker_size) {
169                 dev_err(dev, "E: only %d bytes transmitted\n", actual_len);
170                 ret = -EIO;
171         }
172         kfree(buffer);
173 error_kzalloc:
174         if (do_autopm)
175                 usb_autopm_put_interface(i2400mu->usb_iface);
176         return ret;
177 }
178
179
180 /*
181  * Reset a device at different levels (warm, cold or bus)
182  *
183  * @i2400m: device descriptor
184  * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
185  *
186  * Warm and cold resets get a USB reset if they fail.
187  *
188  * Warm reset:
189  *
190  * The device will be fully reset internally, but won't be
191  * disconnected from the USB bus (so no reenumeration will
192  * happen). Firmware upload will be neccessary.
193  *
194  * The device will send a reboot barker in the notification endpoint
195  * that will trigger the driver to reinitialize the state
196  * automatically from notif.c:i2400m_notification_grok() into
197  * i2400m_dev_bootstrap_delayed().
198  *
199  * Cold and bus (USB) reset:
200  *
201  * The device will be fully reset internally, disconnected from the
202  * USB bus an a reenumeration will happen. Firmware upload will be
203  * neccessary. Thus, we don't do any locking or struct
204  * reinitialization, as we are going to be fully disconnected and
205  * reenumerated.
206  *
207  * Note we need to return -ENODEV if a warm reset was requested and we
208  * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
209  * and wimax_dev->op_reset.
210  *
211  * WARNING: no driver state saved/fixed
212  */
213 static
214 int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
215 {
216         int result;
217         struct i2400mu *i2400mu =
218                 container_of(i2400m, struct i2400mu, i2400m);
219         struct device *dev = i2400m_dev(i2400m);
220         static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
221                 cpu_to_le32(I2400M_WARM_RESET_BARKER),
222                 cpu_to_le32(I2400M_WARM_RESET_BARKER),
223                 cpu_to_le32(I2400M_WARM_RESET_BARKER),
224                 cpu_to_le32(I2400M_WARM_RESET_BARKER),
225         };
226         static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
227                 cpu_to_le32(I2400M_COLD_RESET_BARKER),
228                 cpu_to_le32(I2400M_COLD_RESET_BARKER),
229                 cpu_to_le32(I2400M_COLD_RESET_BARKER),
230                 cpu_to_le32(I2400M_COLD_RESET_BARKER),
231         };
232
233         d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt);
234         if (rt == I2400M_RT_WARM)
235                 result = __i2400mu_send_barker(i2400mu, i2400m_WARM_BOOT_BARKER,
236                                                sizeof(i2400m_WARM_BOOT_BARKER),
237                                                I2400MU_EP_BULK_OUT);
238         else if (rt == I2400M_RT_COLD)
239                 result = __i2400mu_send_barker(i2400mu, i2400m_COLD_BOOT_BARKER,
240                                                sizeof(i2400m_COLD_BOOT_BARKER),
241                                                I2400MU_EP_RESET_COLD);
242         else if (rt == I2400M_RT_BUS) {
243 do_bus_reset:
244                 result = usb_reset_device(i2400mu->usb_dev);
245                 switch (result) {
246                 case 0:
247                 case -EINVAL:   /* device is gone */
248                 case -ENODEV:
249                 case -ENOENT:
250                 case -ESHUTDOWN:
251                         result = rt == I2400M_RT_WARM ? -ENODEV : 0;
252                         break;  /* We assume the device is disconnected */
253                 default:
254                         dev_err(dev, "USB reset failed (%d), giving up!\n",
255                                 result);
256                 }
257         } else {
258                 result = -EINVAL;       /* shut gcc up in certain arches */
259                 BUG();
260         }
261         if (result < 0
262             && result != -EINVAL        /* device is gone */
263             && rt != I2400M_RT_BUS) {
264                 dev_err(dev, "%s reset failed (%d); trying USB reset\n",
265                         rt == I2400M_RT_WARM ? "warm" : "cold", result);
266                 rt = I2400M_RT_BUS;
267                 goto do_bus_reset;
268         }
269         d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result);
270         return result;
271 }
272
273
274 static
275 void i2400mu_netdev_setup(struct net_device *net_dev)
276 {
277         struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
278         struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
279         i2400mu_init(i2400mu);
280         i2400m_netdev_setup(net_dev);
281 }
282
283
284 /*
285  * Debug levels control; see debug.h
286  */
287 struct d_level D_LEVEL[] = {
288         D_SUBMODULE_DEFINE(usb),
289         D_SUBMODULE_DEFINE(fw),
290         D_SUBMODULE_DEFINE(notif),
291         D_SUBMODULE_DEFINE(rx),
292         D_SUBMODULE_DEFINE(tx),
293 };
294 size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
295
296
297 #define __debugfs_register(prefix, name, parent)                        \
298 do {                                                                    \
299         result = d_level_register_debugfs(prefix, name, parent);        \
300         if (result < 0)                                                 \
301                 goto error;                                             \
302 } while (0)
303
304
305 static
306 int i2400mu_debugfs_add(struct i2400mu *i2400mu)
307 {
308         int result;
309         struct device *dev = &i2400mu->usb_iface->dev;
310         struct dentry *dentry = i2400mu->i2400m.wimax_dev.debugfs_dentry;
311         struct dentry *fd;
312
313         dentry = debugfs_create_dir("i2400m-usb", dentry);
314         result = PTR_ERR(dentry);
315         if (IS_ERR(dentry)) {
316                 if (result == -ENODEV)
317                         result = 0;     /* No debugfs support */
318                 goto error;
319         }
320         i2400mu->debugfs_dentry = dentry;
321         __debugfs_register("dl_", usb, dentry);
322         __debugfs_register("dl_", fw, dentry);
323         __debugfs_register("dl_", notif, dentry);
324         __debugfs_register("dl_", rx, dentry);
325         __debugfs_register("dl_", tx, dentry);
326
327         /* Don't touch these if you don't know what you are doing */
328         fd = debugfs_create_u8("rx_size_auto_shrink", 0600, dentry,
329                                &i2400mu->rx_size_auto_shrink);
330         result = PTR_ERR(fd);
331         if (IS_ERR(fd) && result != -ENODEV) {
332                 dev_err(dev, "Can't create debugfs entry "
333                         "rx_size_auto_shrink: %d\n", result);
334                 goto error;
335         }
336
337         fd = debugfs_create_size_t("rx_size", 0600, dentry,
338                                    &i2400mu->rx_size);
339         result = PTR_ERR(fd);
340         if (IS_ERR(fd) && result != -ENODEV) {
341                 dev_err(dev, "Can't create debugfs entry "
342                         "rx_size: %d\n", result);
343                 goto error;
344         }
345
346         return 0;
347
348 error:
349         debugfs_remove_recursive(i2400mu->debugfs_dentry);
350         return result;
351 }
352
353
354 /*
355  * Probe a i2400m interface and register it
356  *
357  * @iface:   USB interface to link to
358  * @id:      USB class/subclass/protocol id
359  * @returns: 0 if ok, < 0 errno code on error.
360  *
361  * Alloc a net device, initialize the bus-specific details and then
362  * calls the bus-generic initialization routine. That will register
363  * the wimax and netdev devices, upload the firmware [using
364  * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the
365  * communication with the device and then will start to talk to it to
366  * finnish setting it up.
367  */
368 static
369 int i2400mu_probe(struct usb_interface *iface,
370                   const struct usb_device_id *id)
371 {
372         int result;
373         struct net_device *net_dev;
374         struct device *dev = &iface->dev;
375         struct i2400m *i2400m;
376         struct i2400mu *i2400mu;
377         struct usb_device *usb_dev = interface_to_usbdev(iface);
378
379         if (usb_dev->speed != USB_SPEED_HIGH)
380                 dev_err(dev, "device not connected as high speed\n");
381
382         /* Allocate instance [calls i2400m_netdev_setup() on it]. */
383         result = -ENOMEM;
384         net_dev = alloc_netdev(sizeof(*i2400mu), "wmx%d",
385                                i2400mu_netdev_setup);
386         if (net_dev == NULL) {
387                 dev_err(dev, "no memory for network device instance\n");
388                 goto error_alloc_netdev;
389         }
390         SET_NETDEV_DEV(net_dev, dev);
391         i2400m = net_dev_to_i2400m(net_dev);
392         i2400mu = container_of(i2400m, struct i2400mu, i2400m);
393         i2400m->wimax_dev.net_dev = net_dev;
394         i2400mu->usb_dev = usb_get_dev(usb_dev);
395         i2400mu->usb_iface = iface;
396         usb_set_intfdata(iface, i2400mu);
397
398         i2400m->bus_tx_block_size = I2400MU_BLK_SIZE;
399         i2400m->bus_pl_size_max = I2400MU_PL_SIZE_MAX;
400         i2400m->bus_dev_start = i2400mu_bus_dev_start;
401         i2400m->bus_dev_stop = i2400mu_bus_dev_stop;
402         i2400m->bus_tx_kick = i2400mu_bus_tx_kick;
403         i2400m->bus_reset = i2400mu_bus_reset;
404         i2400m->bus_bm_retries = I2400M_BOOT_RETRIES;
405         i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send;
406         i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack;
407         i2400m->bus_fw_names = i2400mu_bus_fw_names;
408         i2400m->bus_bm_mac_addr_impaired = 0;
409
410 #ifdef CONFIG_PM
411         iface->needs_remote_wakeup = 1;         /* autosuspend (15s delay) */
412         device_init_wakeup(dev, 1);
413         usb_autopm_enable(i2400mu->usb_iface);
414         usb_dev->autosuspend_delay = 15 * HZ;
415         usb_dev->autosuspend_disabled = 0;
416 #endif
417
418         result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT);
419         if (result < 0) {
420                 dev_err(dev, "cannot setup device: %d\n", result);
421                 goto error_setup;
422         }
423         result = i2400mu_debugfs_add(i2400mu);
424         if (result < 0) {
425                 dev_err(dev, "Can't register i2400mu's debugfs: %d\n", result);
426                 goto error_debugfs_add;
427         }
428         return 0;
429
430 error_debugfs_add:
431         i2400m_release(i2400m);
432 error_setup:
433         usb_set_intfdata(iface, NULL);
434         usb_put_dev(i2400mu->usb_dev);
435         free_netdev(net_dev);
436 error_alloc_netdev:
437         return result;
438 }
439
440
441 /*
442  * Disconect a i2400m from the system.
443  *
444  * i2400m_stop() has been called before, so al the rx and tx contexts
445  * have been taken down already. Make sure the queue is stopped,
446  * unregister netdev and i2400m, free and kill.
447  */
448 static
449 void i2400mu_disconnect(struct usb_interface *iface)
450 {
451         struct i2400mu *i2400mu = usb_get_intfdata(iface);
452         struct i2400m *i2400m = &i2400mu->i2400m;
453         struct net_device *net_dev = i2400m->wimax_dev.net_dev;
454         struct device *dev = &iface->dev;
455
456         d_fnstart(3, dev, "(iface %p i2400m %p)\n", iface, i2400m);
457
458         debugfs_remove_recursive(i2400mu->debugfs_dentry);
459         i2400m_release(i2400m);
460         usb_set_intfdata(iface, NULL);
461         usb_put_dev(i2400mu->usb_dev);
462         free_netdev(net_dev);
463         d_fnend(3, dev, "(iface %p i2400m %p) = void\n", iface, i2400m);
464 }
465
466
467 /*
468  * Get the device ready for USB port or system standby and hibernation
469  *
470  * USB port and system standby are handled the same.
471  *
472  * When the system hibernates, the USB device is powered down and then
473  * up, so we don't really have to do much here, as it will be seen as
474  * a reconnect. Still for simplicity we consider this case the same as
475  * suspend, so that the device has a chance to do notify the base
476  * station (if connected).
477  *
478  * So at the end, the three cases require common handling.
479  *
480  * If at the time of this call the device's firmware is not loaded,
481  * nothing has to be done.
482  *
483  * If the firmware is loaded, we need to:
484  *
485  *  - tell the device to go into host interface power save mode, wait
486  *    for it to ack
487  *
488  *    This is quite more interesting than it is; we need to execute a
489  *    command, but this time, we don't want the code in usb-{tx,rx}.c
490  *    to call the usb_autopm_get/put_interface() barriers as it'd
491  *    deadlock, so we need to decrement i2400mu->do_autopm, that acts
492  *    as a poor man's semaphore. Ugly, but it works.
493  *
494  *    As well, the device might refuse going to sleep for whichever
495  *    reason. In this case we just fail. For system suspend/hibernate,
496  *    we *can't* fail. We look at usb_dev->auto_pm to see if the
497  *    suspend call comes from the USB stack or from the system and act
498  *    in consequence.
499  *
500  *  - stop the notification endpoint polling
501  */
502 static
503 int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
504 {
505         int result = 0;
506         struct device *dev = &iface->dev;
507         struct i2400mu *i2400mu = usb_get_intfdata(iface);
508 #ifdef CONFIG_PM
509         struct usb_device *usb_dev = i2400mu->usb_dev;
510 #endif
511         unsigned is_autosuspend = 0;
512         struct i2400m *i2400m = &i2400mu->i2400m;
513
514 #ifdef CONFIG_PM
515         if (usb_dev->auto_pm > 0)
516                 is_autosuspend = 1;
517 #endif
518
519         d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event);
520         if (i2400m->updown == 0)
521                 goto no_firmware;
522         if (i2400m->state == I2400M_SS_DATA_PATH_CONNECTED && is_autosuspend) {
523                 /* ugh -- the device is connected and this suspend
524                  * request is an autosuspend one (not a system standby
525                  * / hibernate).
526                  *
527                  * The only way the device can go to standby is if the
528                  * link with the base station is in IDLE mode; that
529                  * were the case, we'd be in status
530                  * I2400M_SS_CONNECTED_IDLE. But we are not.
531                  *
532                  * If we *tell* him to go power save now, it'll reset
533                  * as a precautionary measure, so if this is an
534                  * autosuspend thing, say no and it'll come back
535                  * later, when the link is IDLE
536                  */
537                 result = -EBADF;
538                 d_printf(1, dev, "fw up, link up, not-idle, autosuspend: "
539                          "not entering powersave\n");
540                 goto error_not_now;
541         }
542         d_printf(1, dev, "fw up: entering powersave\n");
543         atomic_dec(&i2400mu->do_autopm);
544         result = i2400m_cmd_enter_powersave(i2400m);
545         atomic_inc(&i2400mu->do_autopm);
546         if (result < 0 && !is_autosuspend) {
547                 /* System suspend, can't fail */
548                 dev_err(dev, "failed to suspend, will reset on resume\n");
549                 result = 0;
550         }
551         if (result < 0)
552                 goto error_enter_powersave;
553         i2400mu_notification_release(i2400mu);
554         d_printf(1, dev, "powersave requested\n");
555 error_enter_powersave:
556 error_not_now:
557 no_firmware:
558         d_fnend(3, dev, "(iface %p pm_msg %u) = %d\n",
559                 iface, pm_msg.event, result);
560         return result;
561 }
562
563
564 static
565 int i2400mu_resume(struct usb_interface *iface)
566 {
567         int ret = 0;
568         struct device *dev = &iface->dev;
569         struct i2400mu *i2400mu = usb_get_intfdata(iface);
570         struct i2400m *i2400m = &i2400mu->i2400m;
571
572         d_fnstart(3, dev, "(iface %p)\n", iface);
573         if (i2400m->updown == 0) {
574                 d_printf(1, dev, "fw was down, no resume neeed\n");
575                 goto out;
576         }
577         d_printf(1, dev, "fw was up, resuming\n");
578         i2400mu_notification_setup(i2400mu);
579         /* USB has flow control, so we don't need to give it time to
580          * come back; otherwise, we'd use something like a get-state
581          * command... */
582 out:
583         d_fnend(3, dev, "(iface %p) = %d\n", iface, ret);
584         return ret;
585 }
586
587
588 static
589 struct usb_device_id i2400mu_id_table[] = {
590         { USB_DEVICE(0x8086, 0x0181) },
591         { USB_DEVICE(0x8086, 0x1403) },
592         { USB_DEVICE(0x8086, 0x1405) },
593         { USB_DEVICE(0x8086, 0x0180) },
594         { USB_DEVICE(0x8086, 0x0182) },
595         { USB_DEVICE(0x8086, 0x1406) },
596         { USB_DEVICE(0x8086, 0x1403) },
597         { },
598 };
599 MODULE_DEVICE_TABLE(usb, i2400mu_id_table);
600
601
602 static
603 struct usb_driver i2400mu_driver = {
604         .name = KBUILD_MODNAME,
605         .suspend = i2400mu_suspend,
606         .resume = i2400mu_resume,
607         .probe = i2400mu_probe,
608         .disconnect = i2400mu_disconnect,
609         .id_table = i2400mu_id_table,
610         .supports_autosuspend = 1,
611 };
612
613 static
614 int __init i2400mu_driver_init(void)
615 {
616         return usb_register(&i2400mu_driver);
617 }
618 module_init(i2400mu_driver_init);
619
620
621 static
622 void __exit i2400mu_driver_exit(void)
623 {
624         flush_scheduled_work(); /* for the stuff we schedule from sysfs.c */
625         usb_deregister(&i2400mu_driver);
626 }
627 module_exit(i2400mu_driver_exit);
628
629 MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>");
630 MODULE_DESCRIPTION("Intel 2400M WiMAX networking for USB");
631 MODULE_LICENSE("GPL");
632 MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_4);
633 MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_3);