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Commit | Line | Data |
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024f7f31 IPG |
1 | /* |
2 | * Intel Wireless WiMAX Connection 2400m | |
3 | * Generic probe/disconnect, reset and message passing | |
4 | * | |
5 | * | |
6 | * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com> | |
7 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License version | |
11 | * 2 as published by the Free Software Foundation. | |
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 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
21 | * 02110-1301, USA. | |
22 | * | |
23 | * | |
24 | * See i2400m.h for driver documentation. This contains helpers for | |
25 | * the driver model glue [_setup()/_release()], handling device resets | |
26 | * [_dev_reset_handle()], and the backends for the WiMAX stack ops | |
27 | * reset [_op_reset()] and message from user [_op_msg_from_user()]. | |
28 | * | |
29 | * ROADMAP: | |
30 | * | |
31 | * i2400m_op_msg_from_user() | |
32 | * i2400m_msg_to_dev() | |
33 | * wimax_msg_to_user_send() | |
34 | * | |
35 | * i2400m_op_reset() | |
36 | * i240m->bus_reset() | |
37 | * | |
38 | * i2400m_dev_reset_handle() | |
39 | * __i2400m_dev_reset_handle() | |
40 | * __i2400m_dev_stop() | |
41 | * __i2400m_dev_start() | |
42 | * | |
43 | * i2400m_setup() | |
0856ccf2 | 44 | * i2400m->bus_setup() |
024f7f31 IPG |
45 | * i2400m_bootrom_init() |
46 | * register_netdev() | |
0856ccf2 | 47 | * wimax_dev_add() |
024f7f31 IPG |
48 | * i2400m_dev_start() |
49 | * __i2400m_dev_start() | |
50 | * i2400m_dev_bootstrap() | |
51 | * i2400m_tx_setup() | |
52 | * i2400m->bus_dev_start() | |
6a0f7ab8 | 53 | * i2400m_firmware_check() |
024f7f31 | 54 | * i2400m_check_mac_addr() |
024f7f31 IPG |
55 | * |
56 | * i2400m_release() | |
024f7f31 IPG |
57 | * i2400m_dev_stop() |
58 | * __i2400m_dev_stop() | |
59 | * i2400m_dev_shutdown() | |
60 | * i2400m->bus_dev_stop() | |
61 | * i2400m_tx_release() | |
0856ccf2 IPG |
62 | * i2400m->bus_release() |
63 | * wimax_dev_rm() | |
024f7f31 IPG |
64 | * unregister_netdev() |
65 | */ | |
66 | #include "i2400m.h" | |
fe442683 | 67 | #include <linux/etherdevice.h> |
024f7f31 IPG |
68 | #include <linux/wimax/i2400m.h> |
69 | #include <linux/module.h> | |
70 | #include <linux/moduleparam.h> | |
7b43ca70 | 71 | #include <linux/suspend.h> |
5a0e3ad6 | 72 | #include <linux/slab.h> |
024f7f31 IPG |
73 | |
74 | #define D_SUBMODULE driver | |
75 | #include "debug-levels.h" | |
76 | ||
77 | ||
78 | int i2400m_idle_mode_disabled; /* 0 (idle mode enabled) by default */ | |
79 | module_param_named(idle_mode_disabled, i2400m_idle_mode_disabled, int, 0644); | |
80 | MODULE_PARM_DESC(idle_mode_disabled, | |
81 | "If true, the device will not enable idle mode negotiation " | |
82 | "with the base station (when connected) to save power."); | |
83 | ||
c747583d IPG |
84 | int i2400m_rx_reorder_disabled; /* 0 (rx reorder enabled) by default */ |
85 | module_param_named(rx_reorder_disabled, i2400m_rx_reorder_disabled, int, 0644); | |
86 | MODULE_PARM_DESC(rx_reorder_disabled, | |
87 | "If true, RX reordering will be disabled."); | |
88 | ||
fb101674 IPG |
89 | int i2400m_power_save_disabled; /* 0 (power saving enabled) by default */ |
90 | module_param_named(power_save_disabled, i2400m_power_save_disabled, int, 0644); | |
91 | MODULE_PARM_DESC(power_save_disabled, | |
92 | "If true, the driver will not tell the device to enter " | |
93 | "power saving mode when it reports it is ready for it. " | |
94 | "False by default (so the device is told to do power " | |
95 | "saving)."); | |
96 | ||
4c2b1a11 IPG |
97 | static char i2400m_debug_params[128]; |
98 | module_param_string(debug, i2400m_debug_params, sizeof(i2400m_debug_params), | |
99 | 0644); | |
100 | MODULE_PARM_DESC(debug, | |
101 | "String of space-separated NAME:VALUE pairs, where NAMEs " | |
102 | "are the different debug submodules and VALUE are the " | |
103 | "initial debug value to set."); | |
104 | ||
aba3792a IPG |
105 | static char i2400m_barkers_params[128]; |
106 | module_param_string(barkers, i2400m_barkers_params, | |
107 | sizeof(i2400m_barkers_params), 0644); | |
108 | MODULE_PARM_DESC(barkers, | |
109 | "String of comma-separated 32-bit values; each is " | |
110 | "recognized as the value the device sends as a reboot " | |
111 | "signal; values are appended to a list--setting one value " | |
112 | "as zero cleans the existing list and starts a new one."); | |
113 | ||
b0fbcb2a IPG |
114 | static |
115 | struct i2400m_work *__i2400m_work_setup( | |
116 | struct i2400m *i2400m, void (*fn)(struct work_struct *), | |
117 | gfp_t gfp_flags, const void *pl, size_t pl_size) | |
118 | { | |
119 | struct i2400m_work *iw; | |
120 | ||
121 | iw = kzalloc(sizeof(*iw) + pl_size, gfp_flags); | |
122 | if (iw == NULL) | |
123 | return NULL; | |
124 | iw->i2400m = i2400m_get(i2400m); | |
125 | iw->pl_size = pl_size; | |
126 | memcpy(iw->pl, pl, pl_size); | |
127 | INIT_WORK(&iw->ws, fn); | |
128 | return iw; | |
129 | } | |
130 | ||
131 | ||
024f7f31 IPG |
132 | /* |
133 | * Schedule i2400m's specific work on the system's queue. | |
134 | * | |
135 | * Used for a few cases where we really need it; otherwise, identical | |
136 | * to i2400m_queue_work(). | |
137 | * | |
138 | * Returns < 0 errno code on error, 1 if ok. | |
139 | * | |
140 | * If it returns zero, something really bad happened, as it means the | |
141 | * works struct was already queued, but we have just allocated it, so | |
142 | * it should not happen. | |
143 | */ | |
144 | int i2400m_schedule_work(struct i2400m *i2400m, | |
b0fbcb2a IPG |
145 | void (*fn)(struct work_struct *), gfp_t gfp_flags, |
146 | const void *pl, size_t pl_size) | |
024f7f31 IPG |
147 | { |
148 | int result; | |
149 | struct i2400m_work *iw; | |
150 | ||
024f7f31 | 151 | result = -ENOMEM; |
b0fbcb2a IPG |
152 | iw = __i2400m_work_setup(i2400m, fn, gfp_flags, pl, pl_size); |
153 | if (iw != NULL) { | |
154 | result = schedule_work(&iw->ws); | |
155 | if (WARN_ON(result == 0)) | |
156 | result = -ENXIO; | |
157 | } | |
024f7f31 IPG |
158 | return result; |
159 | } | |
160 | ||
161 | ||
162 | /* | |
163 | * WiMAX stack operation: relay a message from user space | |
164 | * | |
165 | * @wimax_dev: device descriptor | |
166 | * @pipe_name: named pipe the message is for | |
167 | * @msg_buf: pointer to the message bytes | |
168 | * @msg_len: length of the buffer | |
169 | * @genl_info: passed by the generic netlink layer | |
170 | * | |
171 | * The WiMAX stack will call this function when a message was received | |
172 | * from user space. | |
173 | * | |
174 | * For the i2400m, this is an L3L4 message, as specified in | |
175 | * include/linux/wimax/i2400m.h, and thus prefixed with a 'struct | |
176 | * i2400m_l3l4_hdr'. Driver (and device) expect the messages to be | |
177 | * coded in Little Endian. | |
178 | * | |
179 | * This function just verifies that the header declaration and the | |
180 | * payload are consistent and then deals with it, either forwarding it | |
181 | * to the device or procesing it locally. | |
182 | * | |
183 | * In the i2400m, messages are basically commands that will carry an | |
184 | * ack, so we use i2400m_msg_to_dev() and then deliver the ack back to | |
185 | * user space. The rx.c code might intercept the response and use it | |
186 | * to update the driver's state, but then it will pass it on so it can | |
187 | * be relayed back to user space. | |
188 | * | |
189 | * Note that asynchronous events from the device are processed and | |
190 | * sent to user space in rx.c. | |
191 | */ | |
192 | static | |
193 | int i2400m_op_msg_from_user(struct wimax_dev *wimax_dev, | |
194 | const char *pipe_name, | |
195 | const void *msg_buf, size_t msg_len, | |
196 | const struct genl_info *genl_info) | |
197 | { | |
198 | int result; | |
199 | struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev); | |
200 | struct device *dev = i2400m_dev(i2400m); | |
201 | struct sk_buff *ack_skb; | |
202 | ||
203 | d_fnstart(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p " | |
204 | "msg_len %zu genl_info %p)\n", wimax_dev, i2400m, | |
205 | msg_buf, msg_len, genl_info); | |
206 | ack_skb = i2400m_msg_to_dev(i2400m, msg_buf, msg_len); | |
207 | result = PTR_ERR(ack_skb); | |
208 | if (IS_ERR(ack_skb)) | |
209 | goto error_msg_to_dev; | |
024f7f31 IPG |
210 | result = wimax_msg_send(&i2400m->wimax_dev, ack_skb); |
211 | error_msg_to_dev: | |
212 | d_fnend(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p msg_len %zu " | |
213 | "genl_info %p) = %d\n", wimax_dev, i2400m, msg_buf, msg_len, | |
214 | genl_info, result); | |
215 | return result; | |
216 | } | |
217 | ||
218 | ||
219 | /* | |
220 | * Context to wait for a reset to finalize | |
221 | */ | |
222 | struct i2400m_reset_ctx { | |
223 | struct completion completion; | |
224 | int result; | |
225 | }; | |
226 | ||
227 | ||
228 | /* | |
229 | * WiMAX stack operation: reset a device | |
230 | * | |
231 | * @wimax_dev: device descriptor | |
232 | * | |
233 | * See the documentation for wimax_reset() and wimax_dev->op_reset for | |
234 | * the requirements of this function. The WiMAX stack guarantees | |
235 | * serialization on calls to this function. | |
236 | * | |
237 | * Do a warm reset on the device; if it fails, resort to a cold reset | |
238 | * and return -ENODEV. On successful warm reset, we need to block | |
239 | * until it is complete. | |
240 | * | |
241 | * The bus-driver implementation of reset takes care of falling back | |
242 | * to cold reset if warm fails. | |
243 | */ | |
244 | static | |
245 | int i2400m_op_reset(struct wimax_dev *wimax_dev) | |
246 | { | |
247 | int result; | |
248 | struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev); | |
249 | struct device *dev = i2400m_dev(i2400m); | |
250 | struct i2400m_reset_ctx ctx = { | |
251 | .completion = COMPLETION_INITIALIZER_ONSTACK(ctx.completion), | |
252 | .result = 0, | |
253 | }; | |
254 | ||
255 | d_fnstart(4, dev, "(wimax_dev %p)\n", wimax_dev); | |
256 | mutex_lock(&i2400m->init_mutex); | |
257 | i2400m->reset_ctx = &ctx; | |
258 | mutex_unlock(&i2400m->init_mutex); | |
c931ceeb | 259 | result = i2400m_reset(i2400m, I2400M_RT_WARM); |
024f7f31 IPG |
260 | if (result < 0) |
261 | goto out; | |
262 | result = wait_for_completion_timeout(&ctx.completion, 4*HZ); | |
263 | if (result == 0) | |
264 | result = -ETIMEDOUT; | |
265 | else if (result > 0) | |
266 | result = ctx.result; | |
267 | /* if result < 0, pass it on */ | |
268 | mutex_lock(&i2400m->init_mutex); | |
269 | i2400m->reset_ctx = NULL; | |
270 | mutex_unlock(&i2400m->init_mutex); | |
271 | out: | |
272 | d_fnend(4, dev, "(wimax_dev %p) = %d\n", wimax_dev, result); | |
273 | return result; | |
274 | } | |
275 | ||
276 | ||
277 | /* | |
278 | * Check the MAC address we got from boot mode is ok | |
279 | * | |
280 | * @i2400m: device descriptor | |
281 | * | |
282 | * Returns: 0 if ok, < 0 errno code on error. | |
283 | */ | |
284 | static | |
285 | int i2400m_check_mac_addr(struct i2400m *i2400m) | |
286 | { | |
287 | int result; | |
288 | struct device *dev = i2400m_dev(i2400m); | |
289 | struct sk_buff *skb; | |
290 | const struct i2400m_tlv_detailed_device_info *ddi; | |
291 | struct net_device *net_dev = i2400m->wimax_dev.net_dev; | |
292 | const unsigned char zeromac[ETH_ALEN] = { 0 }; | |
293 | ||
294 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
295 | skb = i2400m_get_device_info(i2400m); | |
296 | if (IS_ERR(skb)) { | |
297 | result = PTR_ERR(skb); | |
298 | dev_err(dev, "Cannot verify MAC address, error reading: %d\n", | |
299 | result); | |
300 | goto error; | |
301 | } | |
302 | /* Extract MAC addresss */ | |
303 | ddi = (void *) skb->data; | |
304 | BUILD_BUG_ON(ETH_ALEN != sizeof(ddi->mac_address)); | |
4754b3de | 305 | d_printf(2, dev, "GET DEVICE INFO: mac addr %pM\n", |
306 | ddi->mac_address); | |
024f7f31 IPG |
307 | if (!memcmp(net_dev->perm_addr, ddi->mac_address, |
308 | sizeof(ddi->mac_address))) | |
309 | goto ok; | |
310 | dev_warn(dev, "warning: device reports a different MAC address " | |
311 | "to that of boot mode's\n"); | |
4754b3de | 312 | dev_warn(dev, "device reports %pM\n", ddi->mac_address); |
313 | dev_warn(dev, "boot mode reported %pM\n", net_dev->perm_addr); | |
024f7f31 IPG |
314 | if (!memcmp(zeromac, ddi->mac_address, sizeof(zeromac))) |
315 | dev_err(dev, "device reports an invalid MAC address, " | |
316 | "not updating\n"); | |
317 | else { | |
318 | dev_warn(dev, "updating MAC address\n"); | |
319 | net_dev->addr_len = ETH_ALEN; | |
320 | memcpy(net_dev->perm_addr, ddi->mac_address, ETH_ALEN); | |
321 | memcpy(net_dev->dev_addr, ddi->mac_address, ETH_ALEN); | |
322 | } | |
323 | ok: | |
324 | result = 0; | |
325 | kfree_skb(skb); | |
326 | error: | |
327 | d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); | |
328 | return result; | |
329 | } | |
330 | ||
331 | ||
332 | /** | |
333 | * __i2400m_dev_start - Bring up driver communication with the device | |
334 | * | |
335 | * @i2400m: device descriptor | |
336 | * @flags: boot mode flags | |
337 | * | |
338 | * Returns: 0 if ok, < 0 errno code on error. | |
339 | * | |
340 | * Uploads firmware and brings up all the resources needed to be able | |
341 | * to communicate with the device. | |
342 | * | |
e9a6b45b IPG |
343 | * The workqueue has to be setup early, at least before RX handling |
344 | * (it's only real user for now) so it can process reports as they | |
345 | * arrive. We also want to destroy it if we retry, to make sure it is | |
346 | * flushed...easier like this. | |
347 | * | |
024f7f31 IPG |
348 | * TX needs to be setup before the bus-specific code (otherwise on |
349 | * shutdown, the bus-tx code could try to access it). | |
350 | */ | |
351 | static | |
352 | int __i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri flags) | |
353 | { | |
354 | int result; | |
355 | struct wimax_dev *wimax_dev = &i2400m->wimax_dev; | |
356 | struct net_device *net_dev = wimax_dev->net_dev; | |
357 | struct device *dev = i2400m_dev(i2400m); | |
ecddfd5e | 358 | int times = i2400m->bus_bm_retries; |
024f7f31 IPG |
359 | |
360 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
361 | retry: | |
362 | result = i2400m_dev_bootstrap(i2400m, flags); | |
363 | if (result < 0) { | |
364 | dev_err(dev, "cannot bootstrap device: %d\n", result); | |
365 | goto error_bootstrap; | |
366 | } | |
367 | result = i2400m_tx_setup(i2400m); | |
368 | if (result < 0) | |
369 | goto error_tx_setup; | |
c747583d IPG |
370 | result = i2400m_rx_setup(i2400m); |
371 | if (result < 0) | |
372 | goto error_rx_setup; | |
024f7f31 IPG |
373 | i2400m->work_queue = create_singlethread_workqueue(wimax_dev->name); |
374 | if (i2400m->work_queue == NULL) { | |
375 | result = -ENOMEM; | |
376 | dev_err(dev, "cannot create workqueue\n"); | |
377 | goto error_create_workqueue; | |
378 | } | |
097acbef IPG |
379 | if (i2400m->bus_dev_start) { |
380 | result = i2400m->bus_dev_start(i2400m); | |
381 | if (result < 0) | |
382 | goto error_bus_dev_start; | |
383 | } | |
c2315b4e IPG |
384 | i2400m->ready = 1; |
385 | wmb(); /* see i2400m->ready's documentation */ | |
a0beba21 IPG |
386 | /* process pending reports from the device */ |
387 | queue_work(i2400m->work_queue, &i2400m->rx_report_ws); | |
6a0f7ab8 IPG |
388 | result = i2400m_firmware_check(i2400m); /* fw versions ok? */ |
389 | if (result < 0) | |
390 | goto error_fw_check; | |
024f7f31 IPG |
391 | /* At this point is ok to send commands to the device */ |
392 | result = i2400m_check_mac_addr(i2400m); | |
393 | if (result < 0) | |
394 | goto error_check_mac_addr; | |
024f7f31 IPG |
395 | result = i2400m_dev_initialize(i2400m); |
396 | if (result < 0) | |
397 | goto error_dev_initialize; | |
398 | /* At this point, reports will come for the device and set it | |
399 | * to the right state if it is different than UNINITIALIZED */ | |
400 | d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n", | |
401 | net_dev, i2400m, result); | |
402 | return result; | |
403 | ||
404 | error_dev_initialize: | |
405 | error_check_mac_addr: | |
c2315b4e IPG |
406 | i2400m->ready = 0; |
407 | wmb(); /* see i2400m->ready's documentation */ | |
408 | flush_workqueue(i2400m->work_queue); | |
6a0f7ab8 | 409 | error_fw_check: |
097acbef IPG |
410 | if (i2400m->bus_dev_stop) |
411 | i2400m->bus_dev_stop(i2400m); | |
024f7f31 | 412 | error_bus_dev_start: |
e9a6b45b IPG |
413 | destroy_workqueue(i2400m->work_queue); |
414 | error_create_workqueue: | |
c747583d IPG |
415 | i2400m_rx_release(i2400m); |
416 | error_rx_setup: | |
024f7f31 IPG |
417 | i2400m_tx_release(i2400m); |
418 | error_tx_setup: | |
419 | error_bootstrap: | |
0bcfc5ef | 420 | if (result == -EL3RST && times-- > 0) { |
8b5b30ee | 421 | flags = I2400M_BRI_SOFT|I2400M_BRI_MAC_REINIT; |
024f7f31 IPG |
422 | goto retry; |
423 | } | |
424 | d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n", | |
425 | net_dev, i2400m, result); | |
426 | return result; | |
427 | } | |
428 | ||
429 | ||
430 | static | |
431 | int i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri bm_flags) | |
432 | { | |
c2315b4e | 433 | int result = 0; |
024f7f31 | 434 | mutex_lock(&i2400m->init_mutex); /* Well, start the device */ |
c2315b4e IPG |
435 | if (i2400m->updown == 0) { |
436 | result = __i2400m_dev_start(i2400m, bm_flags); | |
437 | if (result >= 0) { | |
438 | i2400m->updown = 1; | |
439 | wmb(); /* see i2400m->updown's documentation */ | |
440 | } | |
441 | } | |
024f7f31 IPG |
442 | mutex_unlock(&i2400m->init_mutex); |
443 | return result; | |
444 | } | |
445 | ||
446 | ||
447 | /** | |
448 | * i2400m_dev_stop - Tear down driver communication with the device | |
449 | * | |
450 | * @i2400m: device descriptor | |
451 | * | |
452 | * Returns: 0 if ok, < 0 errno code on error. | |
453 | * | |
e9a6b45b IPG |
454 | * Releases all the resources allocated to communicate with the |
455 | * device. Note we cannot destroy the workqueue earlier as until RX is | |
456 | * fully destroyed, it could still try to schedule jobs. | |
024f7f31 IPG |
457 | */ |
458 | static | |
459 | void __i2400m_dev_stop(struct i2400m *i2400m) | |
460 | { | |
461 | struct wimax_dev *wimax_dev = &i2400m->wimax_dev; | |
462 | struct device *dev = i2400m_dev(i2400m); | |
463 | ||
464 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
465 | wimax_state_change(wimax_dev, __WIMAX_ST_QUIESCING); | |
5eeae35b IPG |
466 | i2400m_msg_to_dev_cancel_wait(i2400m, -EL3RST); |
467 | complete(&i2400m->msg_completion); | |
ac53aed9 | 468 | i2400m_net_wake_stop(i2400m); |
024f7f31 | 469 | i2400m_dev_shutdown(i2400m); |
c2315b4e IPG |
470 | /* |
471 | * Make sure no report hooks are running *before* we stop the | |
472 | * communication infrastructure with the device. | |
473 | */ | |
474 | i2400m->ready = 0; /* nobody can queue work anymore */ | |
475 | wmb(); /* see i2400m->ready's documentation */ | |
476 | flush_workqueue(i2400m->work_queue); | |
477 | ||
097acbef IPG |
478 | if (i2400m->bus_dev_stop) |
479 | i2400m->bus_dev_stop(i2400m); | |
e9a6b45b | 480 | destroy_workqueue(i2400m->work_queue); |
c747583d | 481 | i2400m_rx_release(i2400m); |
024f7f31 IPG |
482 | i2400m_tx_release(i2400m); |
483 | wimax_state_change(wimax_dev, WIMAX_ST_DOWN); | |
484 | d_fnend(3, dev, "(i2400m %p) = 0\n", i2400m); | |
485 | } | |
486 | ||
487 | ||
488 | /* | |
489 | * Watch out -- we only need to stop if there is a need for it. The | |
490 | * device could have reset itself and failed to come up again (see | |
491 | * _i2400m_dev_reset_handle()). | |
492 | */ | |
493 | static | |
494 | void i2400m_dev_stop(struct i2400m *i2400m) | |
495 | { | |
496 | mutex_lock(&i2400m->init_mutex); | |
497 | if (i2400m->updown) { | |
498 | __i2400m_dev_stop(i2400m); | |
499 | i2400m->updown = 0; | |
c2315b4e | 500 | wmb(); /* see i2400m->updown's documentation */ |
024f7f31 IPG |
501 | } |
502 | mutex_unlock(&i2400m->init_mutex); | |
503 | } | |
504 | ||
505 | ||
7b43ca70 IPG |
506 | /* |
507 | * Listen to PM events to cache the firmware before suspend/hibernation | |
508 | * | |
509 | * When the device comes out of suspend, it might go into reset and | |
510 | * firmware has to be uploaded again. At resume, most of the times, we | |
511 | * can't load firmware images from disk, so we need to cache it. | |
512 | * | |
513 | * i2400m_fw_cache() will allocate a kobject and attach the firmware | |
514 | * to it; that way we don't have to worry too much about the fw loader | |
515 | * hitting a race condition. | |
516 | * | |
517 | * Note: modus operandi stolen from the Orinoco driver; thx. | |
518 | */ | |
519 | static | |
520 | int i2400m_pm_notifier(struct notifier_block *notifier, | |
521 | unsigned long pm_event, | |
522 | void *unused) | |
523 | { | |
524 | struct i2400m *i2400m = | |
525 | container_of(notifier, struct i2400m, pm_notifier); | |
526 | struct device *dev = i2400m_dev(i2400m); | |
527 | ||
528 | d_fnstart(3, dev, "(i2400m %p pm_event %lx)\n", i2400m, pm_event); | |
529 | switch (pm_event) { | |
530 | case PM_HIBERNATION_PREPARE: | |
531 | case PM_SUSPEND_PREPARE: | |
532 | i2400m_fw_cache(i2400m); | |
533 | break; | |
534 | case PM_POST_RESTORE: | |
535 | /* Restore from hibernation failed. We need to clean | |
536 | * up in exactly the same way, so fall through. */ | |
537 | case PM_POST_HIBERNATION: | |
538 | case PM_POST_SUSPEND: | |
539 | i2400m_fw_uncache(i2400m); | |
540 | break; | |
541 | ||
542 | case PM_RESTORE_PREPARE: | |
543 | default: | |
544 | break; | |
545 | } | |
546 | d_fnend(3, dev, "(i2400m %p pm_event %lx) = void\n", i2400m, pm_event); | |
547 | return NOTIFY_DONE; | |
548 | } | |
549 | ||
550 | ||
3725d8c9 IPG |
551 | /* |
552 | * pre-reset is called before a device is going on reset | |
553 | * | |
554 | * This has to be followed by a call to i2400m_post_reset(), otherwise | |
555 | * bad things might happen. | |
556 | */ | |
557 | int i2400m_pre_reset(struct i2400m *i2400m) | |
558 | { | |
559 | int result; | |
560 | struct device *dev = i2400m_dev(i2400m); | |
561 | ||
562 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
563 | d_printf(1, dev, "pre-reset shut down\n"); | |
564 | ||
565 | result = 0; | |
566 | mutex_lock(&i2400m->init_mutex); | |
567 | if (i2400m->updown) { | |
568 | netif_tx_disable(i2400m->wimax_dev.net_dev); | |
569 | __i2400m_dev_stop(i2400m); | |
570 | result = 0; | |
571 | /* down't set updown to zero -- this way | |
572 | * post_reset can restore properly */ | |
573 | } | |
574 | mutex_unlock(&i2400m->init_mutex); | |
575 | if (i2400m->bus_release) | |
576 | i2400m->bus_release(i2400m); | |
577 | d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); | |
578 | return result; | |
579 | } | |
580 | EXPORT_SYMBOL_GPL(i2400m_pre_reset); | |
581 | ||
582 | ||
583 | /* | |
584 | * Restore device state after a reset | |
585 | * | |
586 | * Do the work needed after a device reset to bring it up to the same | |
587 | * state as it was before the reset. | |
588 | * | |
589 | * NOTE: this requires i2400m->init_mutex taken | |
590 | */ | |
591 | int i2400m_post_reset(struct i2400m *i2400m) | |
592 | { | |
593 | int result = 0; | |
594 | struct device *dev = i2400m_dev(i2400m); | |
595 | ||
596 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
597 | d_printf(1, dev, "post-reset start\n"); | |
598 | if (i2400m->bus_setup) { | |
599 | result = i2400m->bus_setup(i2400m); | |
600 | if (result < 0) { | |
601 | dev_err(dev, "bus-specific setup failed: %d\n", | |
602 | result); | |
603 | goto error_bus_setup; | |
604 | } | |
605 | } | |
606 | mutex_lock(&i2400m->init_mutex); | |
607 | if (i2400m->updown) { | |
608 | result = __i2400m_dev_start( | |
609 | i2400m, I2400M_BRI_SOFT | I2400M_BRI_MAC_REINIT); | |
610 | if (result < 0) | |
611 | goto error_dev_start; | |
612 | } | |
613 | mutex_unlock(&i2400m->init_mutex); | |
614 | d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); | |
615 | return result; | |
616 | ||
617 | error_dev_start: | |
618 | if (i2400m->bus_release) | |
619 | i2400m->bus_release(i2400m); | |
620 | error_bus_setup: | |
621 | /* even if the device was up, it could not be recovered, so we | |
622 | * mark it as down. */ | |
623 | i2400m->updown = 0; | |
624 | wmb(); /* see i2400m->updown's documentation */ | |
625 | mutex_unlock(&i2400m->init_mutex); | |
626 | d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); | |
627 | return result; | |
628 | } | |
629 | EXPORT_SYMBOL_GPL(i2400m_post_reset); | |
630 | ||
631 | ||
024f7f31 IPG |
632 | /* |
633 | * The device has rebooted; fix up the device and the driver | |
634 | * | |
635 | * Tear down the driver communication with the device, reload the | |
636 | * firmware and reinitialize the communication with the device. | |
637 | * | |
638 | * If someone calls a reset when the device's firmware is down, in | |
639 | * theory we won't see it because we are not listening. However, just | |
640 | * in case, leave the code to handle it. | |
641 | * | |
642 | * If there is a reset context, use it; this means someone is waiting | |
643 | * for us to tell him when the reset operation is complete and the | |
644 | * device is ready to rock again. | |
645 | * | |
646 | * NOTE: if we are in the process of bringing up or down the | |
647 | * communication with the device [running i2400m_dev_start() or | |
648 | * _stop()], don't do anything, let it fail and handle it. | |
649 | * | |
650 | * This function is ran always in a thread context | |
3ef6129e IPG |
651 | * |
652 | * This function gets passed, as payload to i2400m_work() a 'const | |
653 | * char *' ptr with a "reason" why the reset happened (for messages). | |
024f7f31 IPG |
654 | */ |
655 | static | |
656 | void __i2400m_dev_reset_handle(struct work_struct *ws) | |
657 | { | |
658 | int result; | |
659 | struct i2400m_work *iw = container_of(ws, struct i2400m_work, ws); | |
3ef6129e | 660 | const char *reason; |
024f7f31 IPG |
661 | struct i2400m *i2400m = iw->i2400m; |
662 | struct device *dev = i2400m_dev(i2400m); | |
024f7f31 IPG |
663 | struct i2400m_reset_ctx *ctx = i2400m->reset_ctx; |
664 | ||
3ef6129e IPG |
665 | if (WARN_ON(iw->pl_size != sizeof(reason))) |
666 | reason = "SW BUG: reason n/a"; | |
667 | else | |
668 | memcpy(&reason, iw->pl, sizeof(reason)); | |
669 | ||
670 | d_fnstart(3, dev, "(ws %p i2400m %p reason %s)\n", ws, i2400m, reason); | |
671 | ||
024f7f31 IPG |
672 | result = 0; |
673 | if (mutex_trylock(&i2400m->init_mutex) == 0) { | |
674 | /* We are still in i2400m_dev_start() [let it fail] or | |
675 | * i2400m_dev_stop() [we are shutting down anyway, so | |
676 | * ignore it] or we are resetting somewhere else. */ | |
c2315b4e | 677 | dev_err(dev, "device rebooted somewhere else?\n"); |
0bcfc5ef | 678 | i2400m_msg_to_dev_cancel_wait(i2400m, -EL3RST); |
024f7f31 IPG |
679 | complete(&i2400m->msg_completion); |
680 | goto out; | |
681 | } | |
c2315b4e IPG |
682 | if (i2400m->updown == 0) { |
683 | dev_info(dev, "%s: device is down, doing nothing\n", reason); | |
684 | goto out_unlock; | |
024f7f31 | 685 | } |
3ef6129e | 686 | dev_err(dev, "%s: reinitializing driver\n", reason); |
024f7f31 | 687 | __i2400m_dev_stop(i2400m); |
024f7f31 IPG |
688 | result = __i2400m_dev_start(i2400m, |
689 | I2400M_BRI_SOFT | I2400M_BRI_MAC_REINIT); | |
690 | if (result < 0) { | |
c2315b4e IPG |
691 | i2400m->updown = 0; |
692 | wmb(); /* see i2400m->updown's documentation */ | |
3ef6129e IPG |
693 | dev_err(dev, "%s: cannot start the device: %d\n", |
694 | reason, result); | |
b9ee9501 | 695 | result = -EUCLEAN; |
c2315b4e | 696 | } |
024f7f31 IPG |
697 | out_unlock: |
698 | if (i2400m->reset_ctx) { | |
699 | ctx->result = result; | |
700 | complete(&ctx->completion); | |
701 | } | |
702 | mutex_unlock(&i2400m->init_mutex); | |
b9ee9501 IPG |
703 | if (result == -EUCLEAN) { |
704 | /* ops, need to clean up [w/ init_mutex not held] */ | |
c931ceeb | 705 | result = i2400m_reset(i2400m, I2400M_RT_BUS); |
b9ee9501 IPG |
706 | if (result >= 0) |
707 | result = -ENODEV; | |
708 | } | |
024f7f31 IPG |
709 | out: |
710 | i2400m_put(i2400m); | |
711 | kfree(iw); | |
3ef6129e IPG |
712 | d_fnend(3, dev, "(ws %p i2400m %p reason %s) = void\n", |
713 | ws, i2400m, reason); | |
024f7f31 IPG |
714 | return; |
715 | } | |
716 | ||
717 | ||
718 | /** | |
719 | * i2400m_dev_reset_handle - Handle a device's reset in a thread context | |
720 | * | |
721 | * Schedule a device reset handling out on a thread context, so it | |
722 | * is safe to call from atomic context. We can't use the i2400m's | |
723 | * queue as we are going to destroy it and reinitialize it as part of | |
724 | * the driver bringup/bringup process. | |
725 | * | |
726 | * See __i2400m_dev_reset_handle() for details; that takes care of | |
727 | * reinitializing the driver to handle the reset, calling into the | |
728 | * bus-specific functions ops as needed. | |
729 | */ | |
3ef6129e | 730 | int i2400m_dev_reset_handle(struct i2400m *i2400m, const char *reason) |
024f7f31 | 731 | { |
b4013f91 IPG |
732 | i2400m->boot_mode = 1; |
733 | wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */ | |
024f7f31 | 734 | return i2400m_schedule_work(i2400m, __i2400m_dev_reset_handle, |
3ef6129e | 735 | GFP_ATOMIC, &reason, sizeof(reason)); |
024f7f31 IPG |
736 | } |
737 | EXPORT_SYMBOL_GPL(i2400m_dev_reset_handle); | |
738 | ||
739 | ||
2869da85 IPG |
740 | /* |
741 | * Alloc the command and ack buffers for boot mode | |
a134fd6b DB |
742 | * |
743 | * Get the buffers needed to deal with boot mode messages. These | |
744 | * buffers need to be allocated before the sdio recieve irq is setup. | |
745 | */ | |
2869da85 | 746 | static |
a134fd6b DB |
747 | int i2400m_bm_buf_alloc(struct i2400m *i2400m) |
748 | { | |
749 | int result; | |
750 | ||
751 | result = -ENOMEM; | |
752 | i2400m->bm_cmd_buf = kzalloc(I2400M_BM_CMD_BUF_SIZE, GFP_KERNEL); | |
753 | if (i2400m->bm_cmd_buf == NULL) | |
754 | goto error_bm_cmd_kzalloc; | |
755 | i2400m->bm_ack_buf = kzalloc(I2400M_BM_ACK_BUF_SIZE, GFP_KERNEL); | |
756 | if (i2400m->bm_ack_buf == NULL) | |
757 | goto error_bm_ack_buf_kzalloc; | |
758 | return 0; | |
759 | ||
760 | error_bm_ack_buf_kzalloc: | |
761 | kfree(i2400m->bm_cmd_buf); | |
762 | error_bm_cmd_kzalloc: | |
763 | return result; | |
764 | } | |
a134fd6b | 765 | |
2869da85 IPG |
766 | |
767 | /* | |
768 | * Free boot mode command and ack buffers. | |
a134fd6b | 769 | */ |
2869da85 | 770 | static |
a134fd6b DB |
771 | void i2400m_bm_buf_free(struct i2400m *i2400m) |
772 | { | |
773 | kfree(i2400m->bm_ack_buf); | |
774 | kfree(i2400m->bm_cmd_buf); | |
a134fd6b | 775 | } |
2869da85 IPG |
776 | |
777 | ||
af77dfa7 IPG |
778 | /** |
779 | * i2400m_init - Initialize a 'struct i2400m' from all zeroes | |
780 | * | |
781 | * This is a bus-generic API call. | |
782 | */ | |
783 | void i2400m_init(struct i2400m *i2400m) | |
784 | { | |
785 | wimax_dev_init(&i2400m->wimax_dev); | |
786 | ||
787 | i2400m->boot_mode = 1; | |
788 | i2400m->rx_reorder = 1; | |
789 | init_waitqueue_head(&i2400m->state_wq); | |
790 | ||
791 | spin_lock_init(&i2400m->tx_lock); | |
792 | i2400m->tx_pl_min = UINT_MAX; | |
793 | i2400m->tx_size_min = UINT_MAX; | |
794 | ||
795 | spin_lock_init(&i2400m->rx_lock); | |
796 | i2400m->rx_pl_min = UINT_MAX; | |
797 | i2400m->rx_size_min = UINT_MAX; | |
a0beba21 IPG |
798 | INIT_LIST_HEAD(&i2400m->rx_reports); |
799 | INIT_WORK(&i2400m->rx_report_ws, i2400m_report_hook_work); | |
af77dfa7 IPG |
800 | |
801 | mutex_init(&i2400m->msg_mutex); | |
802 | init_completion(&i2400m->msg_completion); | |
803 | ||
804 | mutex_init(&i2400m->init_mutex); | |
805 | /* wake_tx_ws is initialized in i2400m_tx_setup() */ | |
806 | } | |
807 | EXPORT_SYMBOL_GPL(i2400m_init); | |
808 | ||
809 | ||
c931ceeb IPG |
810 | int i2400m_reset(struct i2400m *i2400m, enum i2400m_reset_type rt) |
811 | { | |
812 | struct net_device *net_dev = i2400m->wimax_dev.net_dev; | |
813 | ||
814 | /* | |
815 | * Make sure we stop TXs and down the carrier before | |
816 | * resetting; this is needed to avoid things like | |
817 | * i2400m_wake_tx() scheduling stuff in parallel. | |
818 | */ | |
819 | if (net_dev->reg_state == NETREG_REGISTERED) { | |
820 | netif_tx_disable(net_dev); | |
821 | netif_carrier_off(net_dev); | |
822 | } | |
823 | return i2400m->bus_reset(i2400m, rt); | |
824 | } | |
825 | EXPORT_SYMBOL_GPL(i2400m_reset); | |
826 | ||
827 | ||
024f7f31 IPG |
828 | /** |
829 | * i2400m_setup - bus-generic setup function for the i2400m device | |
830 | * | |
831 | * @i2400m: device descriptor (bus-specific parts have been initialized) | |
832 | * | |
833 | * Returns: 0 if ok, < 0 errno code on error. | |
834 | * | |
8f90f3ee IPG |
835 | * Sets up basic device comunication infrastructure, boots the ROM to |
836 | * read the MAC address, registers with the WiMAX and network stacks | |
837 | * and then brings up the device. | |
024f7f31 IPG |
838 | */ |
839 | int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags) | |
840 | { | |
841 | int result = -ENODEV; | |
842 | struct device *dev = i2400m_dev(i2400m); | |
843 | struct wimax_dev *wimax_dev = &i2400m->wimax_dev; | |
844 | struct net_device *net_dev = i2400m->wimax_dev.net_dev; | |
845 | ||
846 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
847 | ||
848 | snprintf(wimax_dev->name, sizeof(wimax_dev->name), | |
347707ba | 849 | "i2400m-%s:%s", dev->bus->name, dev_name(dev)); |
024f7f31 | 850 | |
2869da85 IPG |
851 | result = i2400m_bm_buf_alloc(i2400m); |
852 | if (result < 0) { | |
853 | dev_err(dev, "cannot allocate bootmode scratch buffers\n"); | |
854 | goto error_bm_buf_alloc; | |
855 | } | |
856 | ||
0856ccf2 IPG |
857 | if (i2400m->bus_setup) { |
858 | result = i2400m->bus_setup(i2400m); | |
859 | if (result < 0) { | |
860 | dev_err(dev, "bus-specific setup failed: %d\n", | |
861 | result); | |
862 | goto error_bus_setup; | |
863 | } | |
864 | } | |
865 | ||
024f7f31 IPG |
866 | result = i2400m_bootrom_init(i2400m, bm_flags); |
867 | if (result < 0) { | |
868 | dev_err(dev, "read mac addr: bootrom init " | |
869 | "failed: %d\n", result); | |
870 | goto error_bootrom_init; | |
871 | } | |
872 | result = i2400m_read_mac_addr(i2400m); | |
873 | if (result < 0) | |
874 | goto error_read_mac_addr; | |
fe442683 | 875 | random_ether_addr(i2400m->src_mac_addr); |
024f7f31 | 876 | |
7b43ca70 IPG |
877 | i2400m->pm_notifier.notifier_call = i2400m_pm_notifier; |
878 | register_pm_notifier(&i2400m->pm_notifier); | |
879 | ||
024f7f31 IPG |
880 | result = register_netdev(net_dev); /* Okey dokey, bring it up */ |
881 | if (result < 0) { | |
882 | dev_err(dev, "cannot register i2400m network device: %d\n", | |
883 | result); | |
884 | goto error_register_netdev; | |
885 | } | |
886 | netif_carrier_off(net_dev); | |
887 | ||
024f7f31 IPG |
888 | i2400m->wimax_dev.op_msg_from_user = i2400m_op_msg_from_user; |
889 | i2400m->wimax_dev.op_rfkill_sw_toggle = i2400m_op_rfkill_sw_toggle; | |
890 | i2400m->wimax_dev.op_reset = i2400m_op_reset; | |
8f90f3ee | 891 | |
024f7f31 IPG |
892 | result = wimax_dev_add(&i2400m->wimax_dev, net_dev); |
893 | if (result < 0) | |
894 | goto error_wimax_dev_add; | |
024f7f31 IPG |
895 | |
896 | /* Now setup all that requires a registered net and wimax device. */ | |
8987691a IPG |
897 | result = sysfs_create_group(&net_dev->dev.kobj, &i2400m_dev_attr_group); |
898 | if (result < 0) { | |
899 | dev_err(dev, "cannot setup i2400m's sysfs: %d\n", result); | |
900 | goto error_sysfs_setup; | |
901 | } | |
8f90f3ee | 902 | |
024f7f31 IPG |
903 | result = i2400m_debugfs_add(i2400m); |
904 | if (result < 0) { | |
905 | dev_err(dev, "cannot setup i2400m's debugfs: %d\n", result); | |
906 | goto error_debugfs_setup; | |
907 | } | |
8f90f3ee IPG |
908 | |
909 | result = i2400m_dev_start(i2400m, bm_flags); | |
910 | if (result < 0) | |
911 | goto error_dev_start; | |
024f7f31 IPG |
912 | d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); |
913 | return result; | |
914 | ||
8f90f3ee IPG |
915 | error_dev_start: |
916 | i2400m_debugfs_rm(i2400m); | |
024f7f31 | 917 | error_debugfs_setup: |
8987691a IPG |
918 | sysfs_remove_group(&i2400m->wimax_dev.net_dev->dev.kobj, |
919 | &i2400m_dev_attr_group); | |
920 | error_sysfs_setup: | |
024f7f31 IPG |
921 | wimax_dev_rm(&i2400m->wimax_dev); |
922 | error_wimax_dev_add: | |
024f7f31 IPG |
923 | unregister_netdev(net_dev); |
924 | error_register_netdev: | |
7b43ca70 | 925 | unregister_pm_notifier(&i2400m->pm_notifier); |
024f7f31 IPG |
926 | error_read_mac_addr: |
927 | error_bootrom_init: | |
0856ccf2 IPG |
928 | if (i2400m->bus_release) |
929 | i2400m->bus_release(i2400m); | |
930 | error_bus_setup: | |
2869da85 IPG |
931 | i2400m_bm_buf_free(i2400m); |
932 | error_bm_buf_alloc: | |
024f7f31 IPG |
933 | d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); |
934 | return result; | |
935 | } | |
936 | EXPORT_SYMBOL_GPL(i2400m_setup); | |
937 | ||
938 | ||
939 | /** | |
940 | * i2400m_release - release the bus-generic driver resources | |
941 | * | |
942 | * Sends a disconnect message and undoes any setup done by i2400m_setup() | |
943 | */ | |
944 | void i2400m_release(struct i2400m *i2400m) | |
945 | { | |
946 | struct device *dev = i2400m_dev(i2400m); | |
947 | ||
948 | d_fnstart(3, dev, "(i2400m %p)\n", i2400m); | |
949 | netif_stop_queue(i2400m->wimax_dev.net_dev); | |
950 | ||
8f90f3ee IPG |
951 | i2400m_dev_stop(i2400m); |
952 | ||
024f7f31 | 953 | i2400m_debugfs_rm(i2400m); |
8987691a IPG |
954 | sysfs_remove_group(&i2400m->wimax_dev.net_dev->dev.kobj, |
955 | &i2400m_dev_attr_group); | |
024f7f31 | 956 | wimax_dev_rm(&i2400m->wimax_dev); |
024f7f31 | 957 | unregister_netdev(i2400m->wimax_dev.net_dev); |
7b43ca70 | 958 | unregister_pm_notifier(&i2400m->pm_notifier); |
0856ccf2 IPG |
959 | if (i2400m->bus_release) |
960 | i2400m->bus_release(i2400m); | |
8f90f3ee | 961 | i2400m_bm_buf_free(i2400m); |
024f7f31 IPG |
962 | d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); |
963 | } | |
964 | EXPORT_SYMBOL_GPL(i2400m_release); | |
965 | ||
966 | ||
1af7ad51 IPG |
967 | /* |
968 | * Debug levels control; see debug.h | |
969 | */ | |
970 | struct d_level D_LEVEL[] = { | |
971 | D_SUBMODULE_DEFINE(control), | |
972 | D_SUBMODULE_DEFINE(driver), | |
973 | D_SUBMODULE_DEFINE(debugfs), | |
974 | D_SUBMODULE_DEFINE(fw), | |
975 | D_SUBMODULE_DEFINE(netdev), | |
976 | D_SUBMODULE_DEFINE(rfkill), | |
977 | D_SUBMODULE_DEFINE(rx), | |
4dc1bf07 | 978 | D_SUBMODULE_DEFINE(sysfs), |
1af7ad51 IPG |
979 | D_SUBMODULE_DEFINE(tx), |
980 | }; | |
981 | size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL); | |
982 | ||
983 | ||
024f7f31 IPG |
984 | static |
985 | int __init i2400m_driver_init(void) | |
986 | { | |
4c2b1a11 IPG |
987 | d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400m_debug_params, |
988 | "i2400m.debug"); | |
aba3792a | 989 | return i2400m_barker_db_init(i2400m_barkers_params); |
024f7f31 IPG |
990 | } |
991 | module_init(i2400m_driver_init); | |
992 | ||
993 | static | |
994 | void __exit i2400m_driver_exit(void) | |
995 | { | |
996 | /* for scheds i2400m_dev_reset_handle() */ | |
997 | flush_scheduled_work(); | |
aba3792a | 998 | i2400m_barker_db_exit(); |
024f7f31 IPG |
999 | return; |
1000 | } | |
1001 | module_exit(i2400m_driver_exit); | |
1002 | ||
1003 | MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>"); | |
1004 | MODULE_DESCRIPTION("Intel 2400M WiMAX networking bus-generic driver"); | |
1005 | MODULE_LICENSE("GPL"); |