1 /**
2 * This file contains the major functions in WLAN
3 * driver. It includes init, exit, open, close and main
4 * thread etc..
5 */
6
7 #include <linux/moduleparam.h>
8 #include <linux/delay.h>
9 #include <linux/etherdevice.h>
10 #include <linux/netdevice.h>
11 #include <linux/if_arp.h>
12 #include <linux/kthread.h>
13 #include <linux/kfifo.h>
14 #include <linux/slab.h>
15 #include <net/cfg80211.h>
16
17 #include "host.h"
18 #include "decl.h"
19 #include "dev.h"
20 #include "cfg.h"
21 #include "debugfs.h"
22 #include "cmd.h"
23
24 #define DRIVER_RELEASE_VERSION "323.p0"
25 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
26 #ifdef DEBUG
27 "-dbg"
28 #endif
29 "";
30
31
32 /* Module parameters */
33 unsigned int lbs_debug;
34 EXPORT_SYMBOL_GPL(lbs_debug);
35 module_param_named(libertas_debug, lbs_debug, int, 0644);
36
37
38 /* This global structure is used to send the confirm_sleep command as
39 * fast as possible down to the firmware. */
40 struct cmd_confirm_sleep confirm_sleep;
41
42
43 /**
44 * the table to keep region code
45 */
46 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
47 { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
48
49 /**
50 * FW rate table. FW refers to rates by their index in this table, not by the
51 * rate value itself. Values of 0x00 are
52 * reserved positions.
53 */
54 static u8 fw_data_rates[MAX_RATES] =
55 { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
56 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
57 };
58
59 /**
60 * @brief use index to get the data rate
61 *
62 * @param idx The index of data rate
63 * @return data rate or 0
64 */
lbs_fw_index_to_data_rate(u8 idx)65 u32 lbs_fw_index_to_data_rate(u8 idx)
66 {
67 if (idx >= sizeof(fw_data_rates))
68 idx = 0;
69 return fw_data_rates[idx];
70 }
71
72 /**
73 * @brief use rate to get the index
74 *
75 * @param rate data rate
76 * @return index or 0
77 */
lbs_data_rate_to_fw_index(u32 rate)78 u8 lbs_data_rate_to_fw_index(u32 rate)
79 {
80 u8 i;
81
82 if (!rate)
83 return 0;
84
85 for (i = 0; i < sizeof(fw_data_rates); i++) {
86 if (rate == fw_data_rates[i])
87 return i;
88 }
89 return 0;
90 }
91
92
93 /**
94 * @brief This function opens the ethX interface
95 *
96 * @param dev A pointer to net_device structure
97 * @return 0 or -EBUSY if monitor mode active
98 */
lbs_dev_open(struct net_device * dev)99 static int lbs_dev_open(struct net_device *dev)
100 {
101 struct lbs_private *priv = dev->ml_priv;
102 int ret = 0;
103
104 lbs_deb_enter(LBS_DEB_NET);
105
106 spin_lock_irq(&priv->driver_lock);
107 priv->stopping = false;
108
109 if (priv->connect_status == LBS_CONNECTED)
110 netif_carrier_on(dev);
111 else
112 netif_carrier_off(dev);
113
114 if (!priv->tx_pending_len)
115 netif_wake_queue(dev);
116
117 spin_unlock_irq(&priv->driver_lock);
118 lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
119 return ret;
120 }
121
122 /**
123 * @brief This function closes the ethX interface
124 *
125 * @param dev A pointer to net_device structure
126 * @return 0
127 */
lbs_eth_stop(struct net_device * dev)128 static int lbs_eth_stop(struct net_device *dev)
129 {
130 struct lbs_private *priv = dev->ml_priv;
131
132 lbs_deb_enter(LBS_DEB_NET);
133
134 spin_lock_irq(&priv->driver_lock);
135 priv->stopping = true;
136 netif_stop_queue(dev);
137 spin_unlock_irq(&priv->driver_lock);
138
139 schedule_work(&priv->mcast_work);
140 cancel_delayed_work_sync(&priv->scan_work);
141 if (priv->scan_req) {
142 cfg80211_scan_done(priv->scan_req, false);
143 priv->scan_req = NULL;
144 }
145
146 lbs_deb_leave(LBS_DEB_NET);
147 return 0;
148 }
149
lbs_tx_timeout(struct net_device * dev)150 static void lbs_tx_timeout(struct net_device *dev)
151 {
152 struct lbs_private *priv = dev->ml_priv;
153
154 lbs_deb_enter(LBS_DEB_TX);
155
156 lbs_pr_err("tx watch dog timeout\n");
157
158 dev->trans_start = jiffies; /* prevent tx timeout */
159
160 if (priv->currenttxskb)
161 lbs_send_tx_feedback(priv, 0);
162
163 /* XX: Shouldn't we also call into the hw-specific driver
164 to kick it somehow? */
165 lbs_host_to_card_done(priv);
166
167 /* FIXME: reset the card */
168
169 lbs_deb_leave(LBS_DEB_TX);
170 }
171
lbs_host_to_card_done(struct lbs_private * priv)172 void lbs_host_to_card_done(struct lbs_private *priv)
173 {
174 unsigned long flags;
175
176 lbs_deb_enter(LBS_DEB_THREAD);
177
178 spin_lock_irqsave(&priv->driver_lock, flags);
179
180 priv->dnld_sent = DNLD_RES_RECEIVED;
181
182 /* Wake main thread if commands are pending */
183 if (!priv->cur_cmd || priv->tx_pending_len > 0) {
184 if (!priv->wakeup_dev_required)
185 wake_up_interruptible(&priv->waitq);
186 }
187
188 spin_unlock_irqrestore(&priv->driver_lock, flags);
189 lbs_deb_leave(LBS_DEB_THREAD);
190 }
191 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
192
lbs_set_mac_address(struct net_device * dev,void * addr)193 int lbs_set_mac_address(struct net_device *dev, void *addr)
194 {
195 int ret = 0;
196 struct lbs_private *priv = dev->ml_priv;
197 struct sockaddr *phwaddr = addr;
198 struct cmd_ds_802_11_mac_address cmd;
199
200 lbs_deb_enter(LBS_DEB_NET);
201
202 /* In case it was called from the mesh device */
203 dev = priv->dev;
204
205 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
206 cmd.action = cpu_to_le16(CMD_ACT_SET);
207 memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN);
208
209 ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
210 if (ret) {
211 lbs_deb_net("set MAC address failed\n");
212 goto done;
213 }
214
215 memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
216 memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
217 if (priv->mesh_dev)
218 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
219
220 done:
221 lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
222 return ret;
223 }
224
225
mac_in_list(unsigned char * list,int list_len,unsigned char * mac)226 static inline int mac_in_list(unsigned char *list, int list_len,
227 unsigned char *mac)
228 {
229 while (list_len) {
230 if (!memcmp(list, mac, ETH_ALEN))
231 return 1;
232 list += ETH_ALEN;
233 list_len--;
234 }
235 return 0;
236 }
237
238
lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr * cmd,struct net_device * dev,int nr_addrs)239 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
240 struct net_device *dev, int nr_addrs)
241 {
242 int i = nr_addrs;
243 struct netdev_hw_addr *ha;
244 int cnt;
245
246 if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
247 return nr_addrs;
248
249 netif_addr_lock_bh(dev);
250 cnt = netdev_mc_count(dev);
251 netdev_for_each_mc_addr(ha, dev) {
252 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
253 lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
254 ha->addr);
255 cnt--;
256 continue;
257 }
258
259 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
260 break;
261 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
262 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
263 ha->addr);
264 i++;
265 cnt--;
266 }
267 netif_addr_unlock_bh(dev);
268 if (cnt)
269 return -EOVERFLOW;
270
271 return i;
272 }
273
lbs_set_mcast_worker(struct work_struct * work)274 static void lbs_set_mcast_worker(struct work_struct *work)
275 {
276 struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
277 struct cmd_ds_mac_multicast_adr mcast_cmd;
278 int dev_flags;
279 int nr_addrs;
280 int old_mac_control = priv->mac_control;
281
282 lbs_deb_enter(LBS_DEB_NET);
283
284 dev_flags = priv->dev->flags;
285 if (priv->mesh_dev)
286 dev_flags |= priv->mesh_dev->flags;
287
288 if (dev_flags & IFF_PROMISC) {
289 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
290 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
291 CMD_ACT_MAC_MULTICAST_ENABLE);
292 goto out_set_mac_control;
293 } else if (dev_flags & IFF_ALLMULTI) {
294 do_allmulti:
295 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
296 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
297 CMD_ACT_MAC_MULTICAST_ENABLE);
298 goto out_set_mac_control;
299 }
300
301 /* Once for priv->dev, again for priv->mesh_dev if it exists */
302 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
303 if (nr_addrs >= 0 && priv->mesh_dev)
304 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
305 if (nr_addrs < 0)
306 goto do_allmulti;
307
308 if (nr_addrs) {
309 int size = offsetof(struct cmd_ds_mac_multicast_adr,
310 maclist[6*nr_addrs]);
311
312 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
313 mcast_cmd.hdr.size = cpu_to_le16(size);
314 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
315
316 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
317
318 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
319 } else
320 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
321
322 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
323 CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
324 out_set_mac_control:
325 if (priv->mac_control != old_mac_control)
326 lbs_set_mac_control(priv);
327
328 lbs_deb_leave(LBS_DEB_NET);
329 }
330
lbs_set_multicast_list(struct net_device * dev)331 void lbs_set_multicast_list(struct net_device *dev)
332 {
333 struct lbs_private *priv = dev->ml_priv;
334
335 schedule_work(&priv->mcast_work);
336 }
337
338 /**
339 * @brief This function handles the major jobs in the LBS driver.
340 * It handles all events generated by firmware, RX data received
341 * from firmware and TX data sent from kernel.
342 *
343 * @param data A pointer to lbs_thread structure
344 * @return 0
345 */
lbs_thread(void * data)346 static int lbs_thread(void *data)
347 {
348 struct net_device *dev = data;
349 struct lbs_private *priv = dev->ml_priv;
350 wait_queue_t wait;
351
352 lbs_deb_enter(LBS_DEB_THREAD);
353
354 init_waitqueue_entry(&wait, current);
355
356 for (;;) {
357 int shouldsleep;
358 u8 resp_idx;
359
360 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
361 priv->currenttxskb, priv->dnld_sent);
362
363 add_wait_queue(&priv->waitq, &wait);
364 set_current_state(TASK_INTERRUPTIBLE);
365 spin_lock_irq(&priv->driver_lock);
366
367 if (kthread_should_stop())
368 shouldsleep = 0; /* Bye */
369 else if (priv->surpriseremoved)
370 shouldsleep = 1; /* We need to wait until we're _told_ to die */
371 else if (priv->psstate == PS_STATE_SLEEP)
372 shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */
373 else if (priv->cmd_timed_out)
374 shouldsleep = 0; /* Command timed out. Recover */
375 else if (!priv->fw_ready)
376 shouldsleep = 1; /* Firmware not ready. We're waiting for it */
377 else if (priv->dnld_sent)
378 shouldsleep = 1; /* Something is en route to the device already */
379 else if (priv->tx_pending_len > 0)
380 shouldsleep = 0; /* We've a packet to send */
381 else if (priv->resp_len[priv->resp_idx])
382 shouldsleep = 0; /* We have a command response */
383 else if (priv->cur_cmd)
384 shouldsleep = 1; /* Can't send a command; one already running */
385 else if (!list_empty(&priv->cmdpendingq) &&
386 !(priv->wakeup_dev_required))
387 shouldsleep = 0; /* We have a command to send */
388 else if (kfifo_len(&priv->event_fifo))
389 shouldsleep = 0; /* We have an event to process */
390 else
391 shouldsleep = 1; /* No command */
392
393 if (shouldsleep) {
394 lbs_deb_thread("sleeping, connect_status %d, "
395 "psmode %d, psstate %d\n",
396 priv->connect_status,
397 priv->psmode, priv->psstate);
398 spin_unlock_irq(&priv->driver_lock);
399 schedule();
400 } else
401 spin_unlock_irq(&priv->driver_lock);
402
403 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
404 priv->currenttxskb, priv->dnld_sent);
405
406 set_current_state(TASK_RUNNING);
407 remove_wait_queue(&priv->waitq, &wait);
408
409 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
410 priv->currenttxskb, priv->dnld_sent);
411
412 if (kthread_should_stop()) {
413 lbs_deb_thread("break from main thread\n");
414 break;
415 }
416
417 if (priv->surpriseremoved) {
418 lbs_deb_thread("adapter removed; waiting to die...\n");
419 continue;
420 }
421
422 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
423 priv->currenttxskb, priv->dnld_sent);
424
425 /* Process any pending command response */
426 spin_lock_irq(&priv->driver_lock);
427 resp_idx = priv->resp_idx;
428 if (priv->resp_len[resp_idx]) {
429 spin_unlock_irq(&priv->driver_lock);
430 lbs_process_command_response(priv,
431 priv->resp_buf[resp_idx],
432 priv->resp_len[resp_idx]);
433 spin_lock_irq(&priv->driver_lock);
434 priv->resp_len[resp_idx] = 0;
435 }
436 spin_unlock_irq(&priv->driver_lock);
437
438 /* Process hardware events, e.g. card removed, link lost */
439 spin_lock_irq(&priv->driver_lock);
440 while (kfifo_len(&priv->event_fifo)) {
441 u32 event;
442
443 if (kfifo_out(&priv->event_fifo,
444 (unsigned char *) &event, sizeof(event)) !=
445 sizeof(event))
446 break;
447 spin_unlock_irq(&priv->driver_lock);
448 lbs_process_event(priv, event);
449 spin_lock_irq(&priv->driver_lock);
450 }
451 spin_unlock_irq(&priv->driver_lock);
452
453 if (priv->wakeup_dev_required) {
454 lbs_deb_thread("Waking up device...\n");
455 /* Wake up device */
456 if (priv->exit_deep_sleep(priv))
457 lbs_deb_thread("Wakeup device failed\n");
458 continue;
459 }
460
461 /* command timeout stuff */
462 if (priv->cmd_timed_out && priv->cur_cmd) {
463 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
464
465 lbs_pr_info("Timeout submitting command 0x%04x\n",
466 le16_to_cpu(cmdnode->cmdbuf->command));
467 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
468 if (priv->reset_card)
469 priv->reset_card(priv);
470 }
471 priv->cmd_timed_out = 0;
472
473 if (!priv->fw_ready)
474 continue;
475
476 /* Check if we need to confirm Sleep Request received previously */
477 if (priv->psstate == PS_STATE_PRE_SLEEP &&
478 !priv->dnld_sent && !priv->cur_cmd) {
479 if (priv->connect_status == LBS_CONNECTED) {
480 lbs_deb_thread("pre-sleep, currenttxskb %p, "
481 "dnld_sent %d, cur_cmd %p\n",
482 priv->currenttxskb, priv->dnld_sent,
483 priv->cur_cmd);
484
485 lbs_ps_confirm_sleep(priv);
486 } else {
487 /* workaround for firmware sending
488 * deauth/linkloss event immediately
489 * after sleep request; remove this
490 * after firmware fixes it
491 */
492 priv->psstate = PS_STATE_AWAKE;
493 lbs_pr_alert("ignore PS_SleepConfirm in "
494 "non-connected state\n");
495 }
496 }
497
498 /* The PS state is changed during processing of Sleep Request
499 * event above
500 */
501 if ((priv->psstate == PS_STATE_SLEEP) ||
502 (priv->psstate == PS_STATE_PRE_SLEEP))
503 continue;
504
505 if (priv->is_deep_sleep)
506 continue;
507
508 /* Execute the next command */
509 if (!priv->dnld_sent && !priv->cur_cmd)
510 lbs_execute_next_command(priv);
511
512 spin_lock_irq(&priv->driver_lock);
513 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
514 int ret = priv->hw_host_to_card(priv, MVMS_DAT,
515 priv->tx_pending_buf,
516 priv->tx_pending_len);
517 if (ret) {
518 lbs_deb_tx("host_to_card failed %d\n", ret);
519 priv->dnld_sent = DNLD_RES_RECEIVED;
520 }
521 priv->tx_pending_len = 0;
522 if (!priv->currenttxskb) {
523 /* We can wake the queues immediately if we aren't
524 waiting for TX feedback */
525 if (priv->connect_status == LBS_CONNECTED)
526 netif_wake_queue(priv->dev);
527 if (priv->mesh_dev &&
528 lbs_mesh_connected(priv))
529 netif_wake_queue(priv->mesh_dev);
530 }
531 }
532 spin_unlock_irq(&priv->driver_lock);
533 }
534
535 del_timer(&priv->command_timer);
536 del_timer(&priv->auto_deepsleep_timer);
537
538 lbs_deb_leave(LBS_DEB_THREAD);
539 return 0;
540 }
541
542 /**
543 * @brief This function gets the HW spec from the firmware and sets
544 * some basic parameters.
545 *
546 * @param priv A pointer to struct lbs_private structure
547 * @return 0 or -1
548 */
lbs_setup_firmware(struct lbs_private * priv)549 static int lbs_setup_firmware(struct lbs_private *priv)
550 {
551 int ret = -1;
552 s16 curlevel = 0, minlevel = 0, maxlevel = 0;
553
554 lbs_deb_enter(LBS_DEB_FW);
555
556 /* Read MAC address from firmware */
557 memset(priv->current_addr, 0xff, ETH_ALEN);
558 ret = lbs_update_hw_spec(priv);
559 if (ret)
560 goto done;
561
562 /* Read power levels if available */
563 ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
564 if (ret == 0) {
565 priv->txpower_cur = curlevel;
566 priv->txpower_min = minlevel;
567 priv->txpower_max = maxlevel;
568 }
569
570 /* Send cmd to FW to enable 11D function */
571 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
572
573 lbs_set_mac_control(priv);
574 done:
575 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
576 return ret;
577 }
578
lbs_suspend(struct lbs_private * priv)579 int lbs_suspend(struct lbs_private *priv)
580 {
581 int ret;
582
583 lbs_deb_enter(LBS_DEB_FW);
584
585 if (priv->is_deep_sleep) {
586 ret = lbs_set_deep_sleep(priv, 0);
587 if (ret) {
588 lbs_pr_err("deep sleep cancellation failed: %d\n", ret);
589 return ret;
590 }
591 priv->deep_sleep_required = 1;
592 }
593
594 ret = lbs_set_host_sleep(priv, 1);
595
596 netif_device_detach(priv->dev);
597 if (priv->mesh_dev)
598 netif_device_detach(priv->mesh_dev);
599
600 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
601 return ret;
602 }
603 EXPORT_SYMBOL_GPL(lbs_suspend);
604
lbs_resume(struct lbs_private * priv)605 int lbs_resume(struct lbs_private *priv)
606 {
607 int ret;
608
609 lbs_deb_enter(LBS_DEB_FW);
610
611 ret = lbs_set_host_sleep(priv, 0);
612
613 netif_device_attach(priv->dev);
614 if (priv->mesh_dev)
615 netif_device_attach(priv->mesh_dev);
616
617 if (priv->deep_sleep_required) {
618 priv->deep_sleep_required = 0;
619 ret = lbs_set_deep_sleep(priv, 1);
620 if (ret)
621 lbs_pr_err("deep sleep activation failed: %d\n", ret);
622 }
623
624 if (priv->setup_fw_on_resume)
625 ret = lbs_setup_firmware(priv);
626
627 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
628 return ret;
629 }
630 EXPORT_SYMBOL_GPL(lbs_resume);
631
632 /**
633 * This function handles the timeout of command sending.
634 * It will re-send the same command again.
635 */
lbs_cmd_timeout_handler(unsigned long data)636 static void lbs_cmd_timeout_handler(unsigned long data)
637 {
638 struct lbs_private *priv = (struct lbs_private *)data;
639 unsigned long flags;
640
641 lbs_deb_enter(LBS_DEB_CMD);
642 spin_lock_irqsave(&priv->driver_lock, flags);
643
644 if (!priv->cur_cmd)
645 goto out;
646
647 lbs_pr_info("command 0x%04x timed out\n",
648 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
649
650 priv->cmd_timed_out = 1;
651 wake_up_interruptible(&priv->waitq);
652 out:
653 spin_unlock_irqrestore(&priv->driver_lock, flags);
654 lbs_deb_leave(LBS_DEB_CMD);
655 }
656
657 /**
658 * This function put the device back to deep sleep mode when timer expires
659 * and no activity (command, event, data etc.) is detected.
660 */
auto_deepsleep_timer_fn(unsigned long data)661 static void auto_deepsleep_timer_fn(unsigned long data)
662 {
663 struct lbs_private *priv = (struct lbs_private *)data;
664
665 lbs_deb_enter(LBS_DEB_CMD);
666
667 if (priv->is_activity_detected) {
668 priv->is_activity_detected = 0;
669 } else {
670 if (priv->is_auto_deep_sleep_enabled &&
671 (!priv->wakeup_dev_required) &&
672 (priv->connect_status != LBS_CONNECTED)) {
673 struct cmd_header cmd;
674
675 lbs_deb_main("Entering auto deep sleep mode...\n");
676 memset(&cmd, 0, sizeof(cmd));
677 cmd.size = cpu_to_le16(sizeof(cmd));
678 lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
679 sizeof(cmd));
680 }
681 }
682 mod_timer(&priv->auto_deepsleep_timer , jiffies +
683 (priv->auto_deep_sleep_timeout * HZ)/1000);
684 lbs_deb_leave(LBS_DEB_CMD);
685 }
686
lbs_enter_auto_deep_sleep(struct lbs_private * priv)687 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
688 {
689 lbs_deb_enter(LBS_DEB_SDIO);
690
691 priv->is_auto_deep_sleep_enabled = 1;
692 if (priv->is_deep_sleep)
693 priv->wakeup_dev_required = 1;
694 mod_timer(&priv->auto_deepsleep_timer ,
695 jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
696
697 lbs_deb_leave(LBS_DEB_SDIO);
698 return 0;
699 }
700
lbs_exit_auto_deep_sleep(struct lbs_private * priv)701 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
702 {
703 lbs_deb_enter(LBS_DEB_SDIO);
704
705 priv->is_auto_deep_sleep_enabled = 0;
706 priv->auto_deep_sleep_timeout = 0;
707 del_timer(&priv->auto_deepsleep_timer);
708
709 lbs_deb_leave(LBS_DEB_SDIO);
710 return 0;
711 }
712
lbs_init_adapter(struct lbs_private * priv)713 static int lbs_init_adapter(struct lbs_private *priv)
714 {
715 int ret;
716
717 lbs_deb_enter(LBS_DEB_MAIN);
718
719 memset(priv->current_addr, 0xff, ETH_ALEN);
720
721 priv->connect_status = LBS_DISCONNECTED;
722 priv->channel = DEFAULT_AD_HOC_CHANNEL;
723 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
724 priv->radio_on = 1;
725 priv->psmode = LBS802_11POWERMODECAM;
726 priv->psstate = PS_STATE_FULL_POWER;
727 priv->is_deep_sleep = 0;
728 priv->is_auto_deep_sleep_enabled = 0;
729 priv->deep_sleep_required = 0;
730 priv->wakeup_dev_required = 0;
731 init_waitqueue_head(&priv->ds_awake_q);
732 init_waitqueue_head(&priv->scan_q);
733 priv->authtype_auto = 1;
734 priv->is_host_sleep_configured = 0;
735 priv->is_host_sleep_activated = 0;
736 init_waitqueue_head(&priv->host_sleep_q);
737 mutex_init(&priv->lock);
738
739 setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
740 (unsigned long)priv);
741 setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
742 (unsigned long)priv);
743
744 INIT_LIST_HEAD(&priv->cmdfreeq);
745 INIT_LIST_HEAD(&priv->cmdpendingq);
746
747 spin_lock_init(&priv->driver_lock);
748
749 /* Allocate the command buffers */
750 if (lbs_allocate_cmd_buffer(priv)) {
751 lbs_pr_err("Out of memory allocating command buffers\n");
752 ret = -ENOMEM;
753 goto out;
754 }
755 priv->resp_idx = 0;
756 priv->resp_len[0] = priv->resp_len[1] = 0;
757
758 /* Create the event FIFO */
759 ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
760 if (ret) {
761 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
762 goto out;
763 }
764
765 out:
766 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
767
768 return ret;
769 }
770
lbs_free_adapter(struct lbs_private * priv)771 static void lbs_free_adapter(struct lbs_private *priv)
772 {
773 lbs_deb_enter(LBS_DEB_MAIN);
774
775 lbs_free_cmd_buffer(priv);
776 kfifo_free(&priv->event_fifo);
777 del_timer(&priv->command_timer);
778 del_timer(&priv->auto_deepsleep_timer);
779
780 lbs_deb_leave(LBS_DEB_MAIN);
781 }
782
783 static const struct net_device_ops lbs_netdev_ops = {
784 .ndo_open = lbs_dev_open,
785 .ndo_stop = lbs_eth_stop,
786 .ndo_start_xmit = lbs_hard_start_xmit,
787 .ndo_set_mac_address = lbs_set_mac_address,
788 .ndo_tx_timeout = lbs_tx_timeout,
789 .ndo_set_multicast_list = lbs_set_multicast_list,
790 .ndo_change_mtu = eth_change_mtu,
791 .ndo_validate_addr = eth_validate_addr,
792 };
793
794 /**
795 * @brief This function adds the card. it will probe the
796 * card, allocate the lbs_priv and initialize the device.
797 *
798 * @param card A pointer to card
799 * @return A pointer to struct lbs_private structure
800 */
lbs_add_card(void * card,struct device * dmdev)801 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
802 {
803 struct net_device *dev;
804 struct wireless_dev *wdev;
805 struct lbs_private *priv = NULL;
806
807 lbs_deb_enter(LBS_DEB_MAIN);
808
809 /* Allocate an Ethernet device and register it */
810 wdev = lbs_cfg_alloc(dmdev);
811 if (IS_ERR(wdev)) {
812 lbs_pr_err("cfg80211 init failed\n");
813 goto done;
814 }
815
816 wdev->iftype = NL80211_IFTYPE_STATION;
817 priv = wdev_priv(wdev);
818 priv->wdev = wdev;
819
820 if (lbs_init_adapter(priv)) {
821 lbs_pr_err("failed to initialize adapter structure.\n");
822 goto err_wdev;
823 }
824
825 dev = alloc_netdev(0, "wlan%d", ether_setup);
826 if (!dev) {
827 dev_err(dmdev, "no memory for network device instance\n");
828 goto err_adapter;
829 }
830
831 dev->ieee80211_ptr = wdev;
832 dev->ml_priv = priv;
833 SET_NETDEV_DEV(dev, dmdev);
834 wdev->netdev = dev;
835 priv->dev = dev;
836
837 dev->netdev_ops = &lbs_netdev_ops;
838 dev->watchdog_timeo = 5 * HZ;
839 dev->ethtool_ops = &lbs_ethtool_ops;
840 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
841
842 priv->card = card;
843
844 strcpy(dev->name, "wlan%d");
845
846 lbs_deb_thread("Starting main thread...\n");
847 init_waitqueue_head(&priv->waitq);
848 priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
849 if (IS_ERR(priv->main_thread)) {
850 lbs_deb_thread("Error creating main thread.\n");
851 goto err_ndev;
852 }
853
854 priv->work_thread = create_singlethread_workqueue("lbs_worker");
855 INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
856
857 priv->wol_criteria = EHS_REMOVE_WAKEUP;
858 priv->wol_gpio = 0xff;
859 priv->wol_gap = 20;
860 priv->ehs_remove_supported = true;
861
862 goto done;
863
864 err_ndev:
865 free_netdev(dev);
866
867 err_adapter:
868 lbs_free_adapter(priv);
869
870 err_wdev:
871 lbs_cfg_free(priv);
872
873 priv = NULL;
874
875 done:
876 lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
877 return priv;
878 }
879 EXPORT_SYMBOL_GPL(lbs_add_card);
880
881
lbs_remove_card(struct lbs_private * priv)882 void lbs_remove_card(struct lbs_private *priv)
883 {
884 struct net_device *dev = priv->dev;
885
886 lbs_deb_enter(LBS_DEB_MAIN);
887
888 lbs_remove_mesh(priv);
889 lbs_scan_deinit(priv);
890
891 dev = priv->dev;
892
893 cancel_work_sync(&priv->mcast_work);
894
895 /* worker thread destruction blocks on the in-flight command which
896 * should have been cleared already in lbs_stop_card().
897 */
898 lbs_deb_main("destroying worker thread\n");
899 destroy_workqueue(priv->work_thread);
900 lbs_deb_main("done destroying worker thread\n");
901
902 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
903 priv->psmode = LBS802_11POWERMODECAM;
904 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
905 }
906
907 if (priv->is_deep_sleep) {
908 priv->is_deep_sleep = 0;
909 wake_up_interruptible(&priv->ds_awake_q);
910 }
911
912 priv->is_host_sleep_configured = 0;
913 priv->is_host_sleep_activated = 0;
914 wake_up_interruptible(&priv->host_sleep_q);
915
916 /* Stop the thread servicing the interrupts */
917 priv->surpriseremoved = 1;
918 kthread_stop(priv->main_thread);
919
920 lbs_free_adapter(priv);
921 lbs_cfg_free(priv);
922 free_netdev(dev);
923
924 lbs_deb_leave(LBS_DEB_MAIN);
925 }
926 EXPORT_SYMBOL_GPL(lbs_remove_card);
927
928
lbs_rtap_supported(struct lbs_private * priv)929 int lbs_rtap_supported(struct lbs_private *priv)
930 {
931 if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
932 return 1;
933
934 /* newer firmware use a capability mask */
935 return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
936 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
937 }
938
939
lbs_start_card(struct lbs_private * priv)940 int lbs_start_card(struct lbs_private *priv)
941 {
942 struct net_device *dev = priv->dev;
943 int ret = -1;
944
945 lbs_deb_enter(LBS_DEB_MAIN);
946
947 /* poke the firmware */
948 ret = lbs_setup_firmware(priv);
949 if (ret)
950 goto done;
951
952 if (lbs_cfg_register(priv)) {
953 lbs_pr_err("cannot register device\n");
954 goto done;
955 }
956
957 lbs_update_channel(priv);
958
959 lbs_init_mesh(priv);
960
961 lbs_debugfs_init_one(priv, dev);
962
963 lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
964
965 ret = 0;
966
967 done:
968 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
969 return ret;
970 }
971 EXPORT_SYMBOL_GPL(lbs_start_card);
972
973
lbs_stop_card(struct lbs_private * priv)974 void lbs_stop_card(struct lbs_private *priv)
975 {
976 struct net_device *dev;
977 struct cmd_ctrl_node *cmdnode;
978 unsigned long flags;
979
980 lbs_deb_enter(LBS_DEB_MAIN);
981
982 if (!priv)
983 goto out;
984 dev = priv->dev;
985
986 netif_stop_queue(dev);
987 netif_carrier_off(dev);
988
989 lbs_debugfs_remove_one(priv);
990 lbs_deinit_mesh(priv);
991
992 /* Delete the timeout of the currently processing command */
993 del_timer_sync(&priv->command_timer);
994 del_timer_sync(&priv->auto_deepsleep_timer);
995
996 /* Flush pending command nodes */
997 spin_lock_irqsave(&priv->driver_lock, flags);
998 lbs_deb_main("clearing pending commands\n");
999 list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1000 cmdnode->result = -ENOENT;
1001 cmdnode->cmdwaitqwoken = 1;
1002 wake_up_interruptible(&cmdnode->cmdwait_q);
1003 }
1004
1005 /* Flush the command the card is currently processing */
1006 if (priv->cur_cmd) {
1007 lbs_deb_main("clearing current command\n");
1008 priv->cur_cmd->result = -ENOENT;
1009 priv->cur_cmd->cmdwaitqwoken = 1;
1010 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1011 }
1012 lbs_deb_main("done clearing commands\n");
1013 spin_unlock_irqrestore(&priv->driver_lock, flags);
1014
1015 unregister_netdev(dev);
1016
1017 out:
1018 lbs_deb_leave(LBS_DEB_MAIN);
1019 }
1020 EXPORT_SYMBOL_GPL(lbs_stop_card);
1021
1022
lbs_queue_event(struct lbs_private * priv,u32 event)1023 void lbs_queue_event(struct lbs_private *priv, u32 event)
1024 {
1025 unsigned long flags;
1026
1027 lbs_deb_enter(LBS_DEB_THREAD);
1028 spin_lock_irqsave(&priv->driver_lock, flags);
1029
1030 if (priv->psstate == PS_STATE_SLEEP)
1031 priv->psstate = PS_STATE_AWAKE;
1032
1033 kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1034
1035 wake_up_interruptible(&priv->waitq);
1036
1037 spin_unlock_irqrestore(&priv->driver_lock, flags);
1038 lbs_deb_leave(LBS_DEB_THREAD);
1039 }
1040 EXPORT_SYMBOL_GPL(lbs_queue_event);
1041
lbs_notify_command_response(struct lbs_private * priv,u8 resp_idx)1042 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1043 {
1044 lbs_deb_enter(LBS_DEB_THREAD);
1045
1046 if (priv->psstate == PS_STATE_SLEEP)
1047 priv->psstate = PS_STATE_AWAKE;
1048
1049 /* Swap buffers by flipping the response index */
1050 BUG_ON(resp_idx > 1);
1051 priv->resp_idx = resp_idx;
1052
1053 wake_up_interruptible(&priv->waitq);
1054
1055 lbs_deb_leave(LBS_DEB_THREAD);
1056 }
1057 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1058
1059 /**
1060 * @brief Retrieves two-stage firmware
1061 *
1062 * @param dev A pointer to device structure
1063 * @param user_helper User-defined helper firmware file
1064 * @param user_mainfw User-defined main firmware file
1065 * @param card_model Bus-specific card model ID used to filter firmware table
1066 * elements
1067 * @param fw_table Table of firmware file names and device model numbers
1068 * terminated by an entry with a NULL helper name
1069 * @param helper On success, the helper firmware; caller must free
1070 * @param mainfw On success, the main firmware; caller must free
1071 *
1072 * @return 0 on success, non-zero on failure
1073 */
lbs_get_firmware(struct device * dev,const char * user_helper,const char * user_mainfw,u32 card_model,const struct lbs_fw_table * fw_table,const struct firmware ** helper,const struct firmware ** mainfw)1074 int lbs_get_firmware(struct device *dev, const char *user_helper,
1075 const char *user_mainfw, u32 card_model,
1076 const struct lbs_fw_table *fw_table,
1077 const struct firmware **helper,
1078 const struct firmware **mainfw)
1079 {
1080 const struct lbs_fw_table *iter;
1081 int ret;
1082
1083 BUG_ON(helper == NULL);
1084 BUG_ON(mainfw == NULL);
1085
1086 /* Try user-specified firmware first */
1087 if (user_helper) {
1088 ret = request_firmware(helper, user_helper, dev);
1089 if (ret) {
1090 lbs_pr_err("couldn't find helper firmware %s",
1091 user_helper);
1092 goto fail;
1093 }
1094 }
1095 if (user_mainfw) {
1096 ret = request_firmware(mainfw, user_mainfw, dev);
1097 if (ret) {
1098 lbs_pr_err("couldn't find main firmware %s",
1099 user_mainfw);
1100 goto fail;
1101 }
1102 }
1103
1104 if (*helper && *mainfw)
1105 return 0;
1106
1107 /* Otherwise search for firmware to use. If neither the helper or
1108 * the main firmware were specified by the user, then we need to
1109 * make sure that found helper & main are from the same entry in
1110 * fw_table.
1111 */
1112 iter = fw_table;
1113 while (iter && iter->helper) {
1114 if (iter->model != card_model)
1115 goto next;
1116
1117 if (*helper == NULL) {
1118 ret = request_firmware(helper, iter->helper, dev);
1119 if (ret)
1120 goto next;
1121
1122 /* If the device has one-stage firmware (ie cf8305) and
1123 * we've got it then we don't need to bother with the
1124 * main firmware.
1125 */
1126 if (iter->fwname == NULL)
1127 return 0;
1128 }
1129
1130 if (*mainfw == NULL) {
1131 ret = request_firmware(mainfw, iter->fwname, dev);
1132 if (ret && !user_helper) {
1133 /* Clear the helper if it wasn't user-specified
1134 * and the main firmware load failed, to ensure
1135 * we don't have mismatched firmware pairs.
1136 */
1137 release_firmware(*helper);
1138 *helper = NULL;
1139 }
1140 }
1141
1142 if (*helper && *mainfw)
1143 return 0;
1144
1145 next:
1146 iter++;
1147 }
1148
1149 fail:
1150 /* Failed */
1151 if (*helper) {
1152 release_firmware(*helper);
1153 *helper = NULL;
1154 }
1155 if (*mainfw) {
1156 release_firmware(*mainfw);
1157 *mainfw = NULL;
1158 }
1159
1160 return -ENOENT;
1161 }
1162 EXPORT_SYMBOL_GPL(lbs_get_firmware);
1163
lbs_init_module(void)1164 static int __init lbs_init_module(void)
1165 {
1166 lbs_deb_enter(LBS_DEB_MAIN);
1167 memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1168 confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1169 confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1170 confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1171 lbs_debugfs_init();
1172 lbs_deb_leave(LBS_DEB_MAIN);
1173 return 0;
1174 }
1175
lbs_exit_module(void)1176 static void __exit lbs_exit_module(void)
1177 {
1178 lbs_deb_enter(LBS_DEB_MAIN);
1179 lbs_debugfs_remove();
1180 lbs_deb_leave(LBS_DEB_MAIN);
1181 }
1182
1183 module_init(lbs_init_module);
1184 module_exit(lbs_exit_module);
1185
1186 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1187 MODULE_AUTHOR("Marvell International Ltd.");
1188 MODULE_LICENSE("GPL");
1189