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1/*
2 * Intel Wireless Multicomm 3200 WiFi driver
3 *
4 * Copyright (C) 2009 Intel Corporation. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 * * Neither the name of Intel Corporation nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 *
33 * Intel Corporation <ilw@linux.intel.com>
34 * Samuel Ortiz <samuel.ortiz@intel.com>
35 * Zhu Yi <yi.zhu@intel.com>
36 *
37 */
38
39#include <linux/kernel.h>
40#include <linux/netdevice.h>
41#include <linux/sched.h>
42#include <linux/ieee80211.h>
43#include <linux/wireless.h>
44#include <linux/slab.h>
45
46#include "iwm.h"
47#include "debug.h"
48#include "bus.h"
49#include "umac.h"
50#include "commands.h"
51#include "hal.h"
52#include "fw.h"
53#include "rx.h"
54
55static struct iwm_conf def_iwm_conf = {
56
57 .sdio_ior_timeout = 5000,
58 .calib_map = BIT(CALIB_CFG_DC_IDX) |
59 BIT(CALIB_CFG_LO_IDX) |
60 BIT(CALIB_CFG_TX_IQ_IDX) |
61 BIT(CALIB_CFG_RX_IQ_IDX) |
62 BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
63 .expected_calib_map = BIT(PHY_CALIBRATE_DC_CMD) |
64 BIT(PHY_CALIBRATE_LO_CMD) |
65 BIT(PHY_CALIBRATE_TX_IQ_CMD) |
66 BIT(PHY_CALIBRATE_RX_IQ_CMD) |
67 BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
68 .ct_kill_entry = 110,
69 .ct_kill_exit = 110,
70 .reset_on_fatal_err = 1,
71 .auto_connect = 1,
72 .enable_qos = 1,
73 .mode = UMAC_MODE_BSS,
74
75 /* UMAC configuration */
76 .power_index = 0,
77 .frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD,
78 .rts_threshold = IEEE80211_MAX_RTS_THRESHOLD,
79 .cts_to_self = 0,
80
81 .assoc_timeout = 2,
82 .roam_timeout = 10,
83 .wireless_mode = WIRELESS_MODE_11A | WIRELESS_MODE_11G |
84 WIRELESS_MODE_11N,
85
86 /* IBSS */
87 .ibss_band = UMAC_BAND_2GHZ,
88 .ibss_channel = 1,
89
90 .mac_addr = {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
91};
92
93static int modparam_reset;
94module_param_named(reset, modparam_reset, bool, 0644);
95MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");
96
97static int modparam_wimax_enable = 1;
98module_param_named(wimax_enable, modparam_wimax_enable, bool, 0644);
99MODULE_PARM_DESC(wimax_enable, "Enable wimax core (default 1 [wimax enabled])");
100
101int iwm_mode_to_nl80211_iftype(int mode)
102{
103 switch (mode) {
104 case UMAC_MODE_BSS:
105 return NL80211_IFTYPE_STATION;
106 case UMAC_MODE_IBSS:
107 return NL80211_IFTYPE_ADHOC;
108 default:
109 return NL80211_IFTYPE_UNSPECIFIED;
110 }
111
112 return 0;
113}
114
115static void iwm_statistics_request(struct work_struct *work)
116{
117 struct iwm_priv *iwm =
118 container_of(work, struct iwm_priv, stats_request.work);
119
120 iwm_send_umac_stats_req(iwm, 0);
121}
122
123static void iwm_disconnect_work(struct work_struct *work)
124{
125 struct iwm_priv *iwm =
126 container_of(work, struct iwm_priv, disconnect.work);
127
128 if (iwm->umac_profile_active)
129 iwm_invalidate_mlme_profile(iwm);
130
131 clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
132 iwm->umac_profile_active = 0;
133 memset(iwm->bssid, 0, ETH_ALEN);
134 iwm->channel = 0;
135
136 iwm_link_off(iwm);
137
138 wake_up_interruptible(&iwm->mlme_queue);
139
140 cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0, GFP_KERNEL);
141}
142
143static void iwm_ct_kill_work(struct work_struct *work)
144{
145 struct iwm_priv *iwm =
146 container_of(work, struct iwm_priv, ct_kill_delay.work);
147 struct wiphy *wiphy = iwm_to_wiphy(iwm);
148
149 IWM_INFO(iwm, "CT kill delay timeout\n");
150
151 wiphy_rfkill_set_hw_state(wiphy, false);
152}
153
154static int __iwm_up(struct iwm_priv *iwm);
155static int __iwm_down(struct iwm_priv *iwm);
156
157static void iwm_reset_worker(struct work_struct *work)
158{
159 struct iwm_priv *iwm;
160 struct iwm_umac_profile *profile = NULL;
161 int uninitialized_var(ret), retry = 0;
162
163 iwm = container_of(work, struct iwm_priv, reset_worker);
164
165 /*
166 * XXX: The iwm->mutex is introduced purely for this reset work,
167 * because the other users for iwm_up and iwm_down are only netdev
168 * ndo_open and ndo_stop which are already protected by rtnl.
169 * Please remove iwm->mutex together if iwm_reset_worker() is not
170 * required in the future.
171 */
172 if (!mutex_trylock(&iwm->mutex)) {
173 IWM_WARN(iwm, "We are in the middle of interface bringing "
174 "UP/DOWN. Skip driver resetting.\n");
175 return;
176 }
177
178 if (iwm->umac_profile_active) {
179 profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
180 if (profile)
181 memcpy(profile, iwm->umac_profile, sizeof(*profile));
182 else
183 IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
184 }
185
186 __iwm_down(iwm);
187
188 while (retry++ < 3) {
189 ret = __iwm_up(iwm);
190 if (!ret)
191 break;
192
193 schedule_timeout_uninterruptible(10 * HZ);
194 }
195
196 if (ret) {
197 IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
198
199 kfree(profile);
200 goto out;
201 }
202
203 if (profile) {
204 IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
205 memcpy(iwm->umac_profile, profile, sizeof(*profile));
206 iwm_send_mlme_profile(iwm);
207 kfree(profile);
208 } else
209 clear_bit(IWM_STATUS_RESETTING, &iwm->status);
210
211 out:
212 mutex_unlock(&iwm->mutex);
213}
214
215static void iwm_auth_retry_worker(struct work_struct *work)
216{
217 struct iwm_priv *iwm;
218 int i, ret;
219
220 iwm = container_of(work, struct iwm_priv, auth_retry_worker);
221 if (iwm->umac_profile_active) {
222 ret = iwm_invalidate_mlme_profile(iwm);
223 if (ret < 0)
224 return;
225 }
226
227 iwm->umac_profile->sec.auth_type = UMAC_AUTH_TYPE_LEGACY_PSK;
228
229 ret = iwm_send_mlme_profile(iwm);
230 if (ret < 0)
231 return;
232
233 for (i = 0; i < IWM_NUM_KEYS; i++)
234 if (iwm->keys[i].key_len)
235 iwm_set_key(iwm, 0, &iwm->keys[i]);
236
237 iwm_set_tx_key(iwm, iwm->default_key);
238}
239
240
241
242static void iwm_watchdog(unsigned long data)
243{
244 struct iwm_priv *iwm = (struct iwm_priv *)data;
245
246 IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
247
248 if (modparam_reset)
249 iwm_resetting(iwm);
250}
251
252int iwm_priv_init(struct iwm_priv *iwm)
253{
254 int i, j;
255 char name[32];
256
257 iwm->status = 0;
258 INIT_LIST_HEAD(&iwm->pending_notif);
259 init_waitqueue_head(&iwm->notif_queue);
260 init_waitqueue_head(&iwm->nonwifi_queue);
261 init_waitqueue_head(&iwm->wifi_ntfy_queue);
262 init_waitqueue_head(&iwm->mlme_queue);
263 memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
264 spin_lock_init(&iwm->tx_credit.lock);
265 INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
266 INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
267 iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
268 iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
269 spin_lock_init(&iwm->cmd_lock);
270 iwm->scan_id = 1;
271 INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
272 INIT_DELAYED_WORK(&iwm->disconnect, iwm_disconnect_work);
273 INIT_DELAYED_WORK(&iwm->ct_kill_delay, iwm_ct_kill_work);
274 INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
275 INIT_WORK(&iwm->auth_retry_worker, iwm_auth_retry_worker);
276 INIT_LIST_HEAD(&iwm->bss_list);
277
278 skb_queue_head_init(&iwm->rx_list);
279 INIT_LIST_HEAD(&iwm->rx_tickets);
280 spin_lock_init(&iwm->ticket_lock);
281 for (i = 0; i < IWM_RX_ID_HASH; i++) {
282 INIT_LIST_HEAD(&iwm->rx_packets[i]);
283 spin_lock_init(&iwm->packet_lock[i]);
284 }
285
286 INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
287
288 iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
289 if (!iwm->rx_wq)
290 return -EAGAIN;
291
292 for (i = 0; i < IWM_TX_QUEUES; i++) {
293 INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
294 snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
295 iwm->txq[i].id = i;
296 iwm->txq[i].wq = create_singlethread_workqueue(name);
297 if (!iwm->txq[i].wq)
298 return -EAGAIN;
299
300 skb_queue_head_init(&iwm->txq[i].queue);
301 skb_queue_head_init(&iwm->txq[i].stopped_queue);
302 spin_lock_init(&iwm->txq[i].lock);
303 }
304
305 for (i = 0; i < IWM_NUM_KEYS; i++)
306 memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
307
308 iwm->default_key = -1;
309
310 for (i = 0; i < IWM_STA_TABLE_NUM; i++)
311 for (j = 0; j < IWM_UMAC_TID_NR; j++) {
312 mutex_init(&iwm->sta_table[i].tid_info[j].mutex);
313 iwm->sta_table[i].tid_info[j].stopped = false;
314 }
315
316 init_timer(&iwm->watchdog);
317 iwm->watchdog.function = iwm_watchdog;
318 iwm->watchdog.data = (unsigned long)iwm;
319 mutex_init(&iwm->mutex);
320
321 iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
322 GFP_KERNEL);
323 if (iwm->last_fw_err == NULL)
324 return -ENOMEM;
325
326 return 0;
327}
328
329void iwm_priv_deinit(struct iwm_priv *iwm)
330{
331 int i;
332
333 for (i = 0; i < IWM_TX_QUEUES; i++)
334 destroy_workqueue(iwm->txq[i].wq);
335
336 destroy_workqueue(iwm->rx_wq);
337 kfree(iwm->last_fw_err);
338}
339
340/*
341 * We reset all the structures, and we reset the UMAC.
342 * After calling this routine, you're expected to reload
343 * the firmware.
344 */
345void iwm_reset(struct iwm_priv *iwm)
346{
347 struct iwm_notif *notif, *next;
348
349 if (test_bit(IWM_STATUS_READY, &iwm->status))
350 iwm_target_reset(iwm);
351
352 if (test_bit(IWM_STATUS_RESETTING, &iwm->status)) {
353 iwm->status = 0;
354 set_bit(IWM_STATUS_RESETTING, &iwm->status);
355 } else
356 iwm->status = 0;
357 iwm->scan_id = 1;
358
359 list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
360 list_del(¬if->pending);
361 kfree(notif->buf);
362 kfree(notif);
363 }
364
365 iwm_cmd_flush(iwm);
366
367 flush_workqueue(iwm->rx_wq);
368
369 iwm_link_off(iwm);
370}
371
372void iwm_resetting(struct iwm_priv *iwm)
373{
374 set_bit(IWM_STATUS_RESETTING, &iwm->status);
375
376 schedule_work(&iwm->reset_worker);
377}
378
379/*
380 * Notification code:
381 *
382 * We're faced with the following issue: Any host command can
383 * have an answer or not, and if there's an answer to expect,
384 * it can be treated synchronously or asynchronously.
385 * To work around the synchronous answer case, we implemented
386 * our notification mechanism.
387 * When a code path needs to wait for a command response
388 * synchronously, it calls notif_handle(), which waits for the
389 * right notification to show up, and then process it. Before
390 * starting to wait, it registered as a waiter for this specific
391 * answer (by toggling a bit in on of the handler_map), so that
392 * the rx code knows that it needs to send a notification to the
393 * waiting processes. It does so by calling iwm_notif_send(),
394 * which adds the notification to the pending notifications list,
395 * and then wakes the waiting processes up.
396 */
397int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
398 u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
399{
400 struct iwm_notif *notif;
401
402 notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
403 if (!notif) {
404 IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
405 return -ENOMEM;
406 }
407
408 INIT_LIST_HEAD(¬if->pending);
409 notif->cmd = cmd;
410 notif->cmd_id = cmd_id;
411 notif->src = source;
412 notif->buf = kzalloc(buf_size, GFP_KERNEL);
413 if (!notif->buf) {
414 IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
415 kfree(notif);
416 return -ENOMEM;
417 }
418 notif->buf_size = buf_size;
419 memcpy(notif->buf, buf, buf_size);
420 list_add_tail(¬if->pending, &iwm->pending_notif);
421
422 wake_up_interruptible(&iwm->notif_queue);
423
424 return 0;
425}
426
427static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
428 u8 source)
429{
430 struct iwm_notif *notif;
431
432 list_for_each_entry(notif, &iwm->pending_notif, pending) {
433 if ((notif->cmd_id == cmd) && (notif->src == source)) {
434 list_del(¬if->pending);
435 return notif;
436 }
437 }
438
439 return NULL;
440}
441
442static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
443 u8 source, long timeout)
444{
445 int ret;
446 struct iwm_notif *notif;
447 unsigned long *map = NULL;
448
449 switch (source) {
450 case IWM_SRC_LMAC:
451 map = &iwm->lmac_handler_map[0];
452 break;
453 case IWM_SRC_UMAC:
454 map = &iwm->umac_handler_map[0];
455 break;
456 case IWM_SRC_UDMA:
457 map = &iwm->udma_handler_map[0];
458 break;
459 }
460
461 set_bit(cmd, map);
462
463 ret = wait_event_interruptible_timeout(iwm->notif_queue,
464 ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
465 timeout);
466 clear_bit(cmd, map);
467
468 if (!ret)
469 return NULL;
470
471 return notif;
472}
473
474int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
475{
476 int ret;
477 struct iwm_notif *notif;
478
479 notif = iwm_notif_wait(iwm, cmd, source, timeout);
480 if (!notif)
481 return -ETIME;
482
483 ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
484 kfree(notif->buf);
485 kfree(notif);
486
487 return ret;
488}
489
490static int iwm_config_boot_params(struct iwm_priv *iwm)
491{
492 struct iwm_udma_nonwifi_cmd target_cmd;
493 int ret;
494
495 /* check Wimax is off and config debug monitor */
496 if (!modparam_wimax_enable) {
497 u32 data1 = 0x1f;
498 u32 addr1 = 0x606BE258;
499
500 u32 data2_set = 0x0;
501 u32 data2_clr = 0x1;
502 u32 addr2 = 0x606BE100;
503
504 u32 data3 = 0x1;
505 u32 addr3 = 0x606BEC00;
506
507 target_cmd.resp = 0;
508 target_cmd.handle_by_hw = 0;
509 target_cmd.eop = 1;
510
511 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
512 target_cmd.addr = cpu_to_le32(addr1);
513 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
514 target_cmd.op2 = 0;
515
516 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
517 if (ret < 0) {
518 IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
519 return ret;
520 }
521
522 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
523 target_cmd.addr = cpu_to_le32(addr2);
524 target_cmd.op1_sz = cpu_to_le32(data2_set);
525 target_cmd.op2 = cpu_to_le32(data2_clr);
526
527 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
528 if (ret < 0) {
529 IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
530 return ret;
531 }
532
533 target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
534 target_cmd.addr = cpu_to_le32(addr3);
535 target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
536 target_cmd.op2 = 0;
537
538 ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
539 if (ret < 0) {
540 IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
541 return ret;
542 }
543 }
544
545 return 0;
546}
547
548void iwm_init_default_profile(struct iwm_priv *iwm,
549 struct iwm_umac_profile *profile)
550{
551 memset(profile, 0, sizeof(struct iwm_umac_profile));
552
553 profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
554 profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
555 profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
556 profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
557
558 if (iwm->conf.enable_qos)
559 profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
560
561 profile->wireless_mode = iwm->conf.wireless_mode;
562 profile->mode = cpu_to_le32(iwm->conf.mode);
563
564 profile->ibss.atim = 0;
565 profile->ibss.beacon_interval = 100;
566 profile->ibss.join_only = 0;
567 profile->ibss.band = iwm->conf.ibss_band;
568 profile->ibss.channel = iwm->conf.ibss_channel;
569}
570
571void iwm_link_on(struct iwm_priv *iwm)
572{
573 netif_carrier_on(iwm_to_ndev(iwm));
574 netif_tx_wake_all_queues(iwm_to_ndev(iwm));
575
576 iwm_send_umac_stats_req(iwm, 0);
577}
578
579void iwm_link_off(struct iwm_priv *iwm)
580{
581 struct iw_statistics *wstats = &iwm->wstats;
582 int i;
583
584 netif_tx_stop_all_queues(iwm_to_ndev(iwm));
585 netif_carrier_off(iwm_to_ndev(iwm));
586
587 for (i = 0; i < IWM_TX_QUEUES; i++) {
588 skb_queue_purge(&iwm->txq[i].queue);
589 skb_queue_purge(&iwm->txq[i].stopped_queue);
590
591 iwm->txq[i].concat_count = 0;
592 iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
593
594 flush_workqueue(iwm->txq[i].wq);
595 }
596
597 iwm_rx_free(iwm);
598
599 cancel_delayed_work_sync(&iwm->stats_request);
600 memset(wstats, 0, sizeof(struct iw_statistics));
601 wstats->qual.updated = IW_QUAL_ALL_INVALID;
602
603 kfree(iwm->req_ie);
604 iwm->req_ie = NULL;
605 iwm->req_ie_len = 0;
606 kfree(iwm->resp_ie);
607 iwm->resp_ie = NULL;
608 iwm->resp_ie_len = 0;
609
610 del_timer_sync(&iwm->watchdog);
611}
612
613static void iwm_bss_list_clean(struct iwm_priv *iwm)
614{
615 struct iwm_bss_info *bss, *next;
616
617 list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
618 list_del(&bss->node);
619 kfree(bss->bss);
620 kfree(bss);
621 }
622}
623
624static int iwm_channels_init(struct iwm_priv *iwm)
625{
626 int ret;
627
628 ret = iwm_send_umac_channel_list(iwm);
629 if (ret) {
630 IWM_ERR(iwm, "Send channel list failed\n");
631 return ret;
632 }
633
634 ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
635 IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
636 if (ret) {
637 IWM_ERR(iwm, "Didn't get a channel list notification\n");
638 return ret;
639 }
640
641 return 0;
642}
643
644static int __iwm_up(struct iwm_priv *iwm)
645{
646 int ret;
647 struct iwm_notif *notif_reboot, *notif_ack = NULL;
648 struct wiphy *wiphy = iwm_to_wiphy(iwm);
649 u32 wireless_mode;
650
651 ret = iwm_bus_enable(iwm);
652 if (ret) {
653 IWM_ERR(iwm, "Couldn't enable function\n");
654 return ret;
655 }
656
657 iwm_rx_setup_handlers(iwm);
658
659 /* Wait for initial BARKER_REBOOT from hardware */
660 notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
661 IWM_SRC_UDMA, 2 * HZ);
662 if (!notif_reboot) {
663 IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
664 goto err_disable;
665 }
666
667 /* We send the barker back */
668 ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
669 if (ret) {
670 IWM_ERR(iwm, "REBOOT barker response failed\n");
671 kfree(notif_reboot);
672 goto err_disable;
673 }
674
675 kfree(notif_reboot->buf);
676 kfree(notif_reboot);
677
678 /* Wait for ACK_BARKER from hardware */
679 notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
680 IWM_SRC_UDMA, 2 * HZ);
681 if (!notif_ack) {
682 IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
683 goto err_disable;
684 }
685
686 kfree(notif_ack->buf);
687 kfree(notif_ack);
688
689 /* We start to config static boot parameters */
690 ret = iwm_config_boot_params(iwm);
691 if (ret) {
692 IWM_ERR(iwm, "Config boot parameters failed\n");
693 goto err_disable;
694 }
695
696 ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
697 if (ret) {
698 IWM_ERR(iwm, "MAC reading failed\n");
699 goto err_disable;
700 }
701 memcpy(iwm_to_ndev(iwm)->perm_addr, iwm_to_ndev(iwm)->dev_addr,
702 ETH_ALEN);
703
704 /* We can load the FWs */
705 ret = iwm_load_fw(iwm);
706 if (ret) {
707 IWM_ERR(iwm, "FW loading failed\n");
708 goto err_disable;
709 }
710
711 ret = iwm_eeprom_fat_channels(iwm);
712 if (ret) {
713 IWM_ERR(iwm, "Couldnt read HT channels EEPROM entries\n");
714 goto err_fw;
715 }
716
717 /*
718 * Read our SKU capabilities.
719 * If it's valid, we AND the configured wireless mode with the
720 * device EEPROM value as the current profile wireless mode.
721 */
722 wireless_mode = iwm_eeprom_wireless_mode(iwm);
723 if (wireless_mode) {
724 iwm->conf.wireless_mode &= wireless_mode;
725 if (iwm->umac_profile)
726 iwm->umac_profile->wireless_mode =
727 iwm->conf.wireless_mode;
728 } else
729 IWM_ERR(iwm, "Wrong SKU capabilities: 0x%x\n",
730 *((u16 *)iwm_eeprom_access(iwm, IWM_EEPROM_SKU_CAP)));
731
732 snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "L%s_U%s",
733 iwm->lmac_version, iwm->umac_version);
734
735 /* We configure the UMAC and enable the wifi module */
736 ret = iwm_send_umac_config(iwm,
737 cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
738 cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
739 cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
740 if (ret) {
741 IWM_ERR(iwm, "UMAC config failed\n");
742 goto err_fw;
743 }
744
745 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
746 IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
747 if (ret) {
748 IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
749 goto err_fw;
750 }
751
752 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
753 UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
754 IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
755 iwm->core_enabled);
756 ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
757 IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
758 if (ret) {
759 IWM_ERR(iwm, "Didn't get a core status notification\n");
760 goto err_fw;
761 }
762
763 if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
764 UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
765 IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
766 iwm->core_enabled);
767 goto err_fw;
768 } else {
769 IWM_INFO(iwm, "All cores enabled\n");
770 }
771 }
772
773 ret = iwm_channels_init(iwm);
774 if (ret < 0) {
775 IWM_ERR(iwm, "Couldn't init channels\n");
776 goto err_fw;
777 }
778
779 /* Set the READY bit to indicate interface is brought up successfully */
780 set_bit(IWM_STATUS_READY, &iwm->status);
781
782 return 0;
783
784 err_fw:
785 iwm_eeprom_exit(iwm);
786
787 err_disable:
788 ret = iwm_bus_disable(iwm);
789 if (ret < 0)
790 IWM_ERR(iwm, "Couldn't disable function\n");
791
792 return -EIO;
793}
794
795int iwm_up(struct iwm_priv *iwm)
796{
797 int ret;
798
799 mutex_lock(&iwm->mutex);
800 ret = __iwm_up(iwm);
801 mutex_unlock(&iwm->mutex);
802
803 return ret;
804}
805
806static int __iwm_down(struct iwm_priv *iwm)
807{
808 int ret;
809
810 /* The interface is already down */
811 if (!test_bit(IWM_STATUS_READY, &iwm->status))
812 return 0;
813
814 if (iwm->scan_request) {
815 cfg80211_scan_done(iwm->scan_request, true);
816 iwm->scan_request = NULL;
817 }
818
819 clear_bit(IWM_STATUS_READY, &iwm->status);
820
821 iwm_eeprom_exit(iwm);
822 iwm_bss_list_clean(iwm);
823 iwm_init_default_profile(iwm, iwm->umac_profile);
824 iwm->umac_profile_active = false;
825 iwm->default_key = -1;
826 iwm->core_enabled = 0;
827
828 ret = iwm_bus_disable(iwm);
829 if (ret < 0) {
830 IWM_ERR(iwm, "Couldn't disable function\n");
831 return ret;
832 }
833
834 return 0;
835}
836
837int iwm_down(struct iwm_priv *iwm)
838{
839 int ret;
840
841 mutex_lock(&iwm->mutex);
842 ret = __iwm_down(iwm);
843 mutex_unlock(&iwm->mutex);
844
845 return ret;
846}