xref: /openbmc/linux/drivers/net/wireless/ti/wl1251/main.c (revision a790cc3a)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * This file is part of wl1251
4  *
5  * Copyright (C) 2008-2009 Nokia Corporation
6  */
7 
8 #include <linux/module.h>
9 #include <linux/interrupt.h>
10 #include <linux/firmware.h>
11 #include <linux/delay.h>
12 #include <linux/irq.h>
13 #include <linux/crc32.h>
14 #include <linux/etherdevice.h>
15 #include <linux/vmalloc.h>
16 #include <linux/slab.h>
17 #include <linux/netdevice.h>
18 
19 #include "wl1251.h"
20 #include "wl12xx_80211.h"
21 #include "reg.h"
22 #include "io.h"
23 #include "cmd.h"
24 #include "event.h"
25 #include "tx.h"
26 #include "rx.h"
27 #include "ps.h"
28 #include "init.h"
29 #include "debugfs.h"
30 #include "boot.h"
31 
wl1251_enable_interrupts(struct wl1251 * wl)32 void wl1251_enable_interrupts(struct wl1251 *wl)
33 {
34 	wl->if_ops->enable_irq(wl);
35 }
36 
wl1251_disable_interrupts(struct wl1251 * wl)37 void wl1251_disable_interrupts(struct wl1251 *wl)
38 {
39 	wl->if_ops->disable_irq(wl);
40 }
41 
wl1251_power_off(struct wl1251 * wl)42 static int wl1251_power_off(struct wl1251 *wl)
43 {
44 	return wl->if_ops->power(wl, false);
45 }
46 
wl1251_power_on(struct wl1251 * wl)47 static int wl1251_power_on(struct wl1251 *wl)
48 {
49 	return wl->if_ops->power(wl, true);
50 }
51 
wl1251_fetch_firmware(struct wl1251 * wl)52 static int wl1251_fetch_firmware(struct wl1251 *wl)
53 {
54 	const struct firmware *fw;
55 	struct device *dev = wiphy_dev(wl->hw->wiphy);
56 	int ret;
57 
58 	ret = request_firmware(&fw, WL1251_FW_NAME, dev);
59 
60 	if (ret < 0) {
61 		wl1251_error("could not get firmware: %d", ret);
62 		return ret;
63 	}
64 
65 	if (fw->size % 4) {
66 		wl1251_error("firmware size is not multiple of 32 bits: %zu",
67 			     fw->size);
68 		ret = -EILSEQ;
69 		goto out;
70 	}
71 
72 	wl->fw_len = fw->size;
73 	wl->fw = vmalloc(wl->fw_len);
74 
75 	if (!wl->fw) {
76 		wl1251_error("could not allocate memory for the firmware");
77 		ret = -ENOMEM;
78 		goto out;
79 	}
80 
81 	memcpy(wl->fw, fw->data, wl->fw_len);
82 
83 	ret = 0;
84 
85 out:
86 	release_firmware(fw);
87 
88 	return ret;
89 }
90 
wl1251_fetch_nvs(struct wl1251 * wl)91 static int wl1251_fetch_nvs(struct wl1251 *wl)
92 {
93 	const struct firmware *fw;
94 	struct device *dev = wiphy_dev(wl->hw->wiphy);
95 	int ret;
96 
97 	ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
98 
99 	if (ret < 0) {
100 		wl1251_error("could not get nvs file: %d", ret);
101 		return ret;
102 	}
103 
104 	if (fw->size % 4) {
105 		wl1251_error("nvs size is not multiple of 32 bits: %zu",
106 			     fw->size);
107 		ret = -EILSEQ;
108 		goto out;
109 	}
110 
111 	wl->nvs = kmemdup(fw->data, fw->size, GFP_KERNEL);
112 
113 	if (!wl->nvs) {
114 		wl1251_error("could not allocate memory for the nvs file");
115 		ret = -ENOMEM;
116 		goto out;
117 	}
118 
119 	wl->nvs_len = fw->size;
120 
121 	ret = 0;
122 
123 out:
124 	release_firmware(fw);
125 
126 	return ret;
127 }
128 
wl1251_fw_wakeup(struct wl1251 * wl)129 static void wl1251_fw_wakeup(struct wl1251 *wl)
130 {
131 	u32 elp_reg;
132 
133 	elp_reg = ELPCTRL_WAKE_UP;
134 	wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
135 	elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
136 
137 	if (!(elp_reg & ELPCTRL_WLAN_READY))
138 		wl1251_warning("WLAN not ready");
139 }
140 
wl1251_chip_wakeup(struct wl1251 * wl)141 static int wl1251_chip_wakeup(struct wl1251 *wl)
142 {
143 	int ret;
144 
145 	ret = wl1251_power_on(wl);
146 	if (ret < 0)
147 		return ret;
148 
149 	msleep(WL1251_POWER_ON_SLEEP);
150 	wl->if_ops->reset(wl);
151 
152 	/* We don't need a real memory partition here, because we only want
153 	 * to use the registers at this point. */
154 	wl1251_set_partition(wl,
155 			     0x00000000,
156 			     0x00000000,
157 			     REGISTERS_BASE,
158 			     REGISTERS_DOWN_SIZE);
159 
160 	/* ELP module wake up */
161 	wl1251_fw_wakeup(wl);
162 
163 	/* whal_FwCtrl_BootSm() */
164 
165 	/* 0. read chip id from CHIP_ID */
166 	wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
167 
168 	/* 1. check if chip id is valid */
169 
170 	switch (wl->chip_id) {
171 	case CHIP_ID_1251_PG12:
172 		wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
173 			     wl->chip_id);
174 		break;
175 	case CHIP_ID_1251_PG11:
176 		wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
177 			     wl->chip_id);
178 		break;
179 	case CHIP_ID_1251_PG10:
180 	default:
181 		wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
182 		ret = -ENODEV;
183 		goto out;
184 	}
185 
186 	if (wl->fw == NULL) {
187 		ret = wl1251_fetch_firmware(wl);
188 		if (ret < 0)
189 			goto out;
190 	}
191 
192 out:
193 	return ret;
194 }
195 
196 #define WL1251_IRQ_LOOP_COUNT 10
wl1251_irq_work(struct work_struct * work)197 static void wl1251_irq_work(struct work_struct *work)
198 {
199 	u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
200 	struct wl1251 *wl =
201 		container_of(work, struct wl1251, irq_work);
202 	int ret;
203 
204 	mutex_lock(&wl->mutex);
205 
206 	wl1251_debug(DEBUG_IRQ, "IRQ work");
207 
208 	if (wl->state == WL1251_STATE_OFF)
209 		goto out;
210 
211 	ret = wl1251_ps_elp_wakeup(wl);
212 	if (ret < 0)
213 		goto out;
214 
215 	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
216 
217 	intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
218 	wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
219 
220 	do {
221 		if (wl->data_path) {
222 			wl->rx_counter = wl1251_mem_read32(
223 				wl, wl->data_path->rx_control_addr);
224 
225 			/* We handle a frmware bug here */
226 			switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
227 			case 0:
228 				wl1251_debug(DEBUG_IRQ,
229 					     "RX: FW and host in sync");
230 				intr &= ~WL1251_ACX_INTR_RX0_DATA;
231 				intr &= ~WL1251_ACX_INTR_RX1_DATA;
232 				break;
233 			case 1:
234 				wl1251_debug(DEBUG_IRQ, "RX: FW +1");
235 				intr |= WL1251_ACX_INTR_RX0_DATA;
236 				intr &= ~WL1251_ACX_INTR_RX1_DATA;
237 				break;
238 			case 2:
239 				wl1251_debug(DEBUG_IRQ, "RX: FW +2");
240 				intr |= WL1251_ACX_INTR_RX0_DATA;
241 				intr |= WL1251_ACX_INTR_RX1_DATA;
242 				break;
243 			default:
244 				wl1251_warning(
245 					"RX: FW and host out of sync: %d",
246 					wl->rx_counter - wl->rx_handled);
247 				break;
248 			}
249 
250 			wl->rx_handled = wl->rx_counter;
251 
252 			wl1251_debug(DEBUG_IRQ, "RX counter: %d",
253 				     wl->rx_counter);
254 		}
255 
256 		intr &= wl->intr_mask;
257 
258 		if (intr == 0) {
259 			wl1251_debug(DEBUG_IRQ, "INTR is 0");
260 			goto out_sleep;
261 		}
262 
263 		if (intr & WL1251_ACX_INTR_RX0_DATA) {
264 			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
265 			wl1251_rx(wl);
266 		}
267 
268 		if (intr & WL1251_ACX_INTR_RX1_DATA) {
269 			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
270 			wl1251_rx(wl);
271 		}
272 
273 		if (intr & WL1251_ACX_INTR_TX_RESULT) {
274 			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
275 			wl1251_tx_complete(wl);
276 		}
277 
278 		if (intr & WL1251_ACX_INTR_EVENT_A) {
279 			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
280 			wl1251_event_handle(wl, 0);
281 		}
282 
283 		if (intr & WL1251_ACX_INTR_EVENT_B) {
284 			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
285 			wl1251_event_handle(wl, 1);
286 		}
287 
288 		if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
289 			wl1251_debug(DEBUG_IRQ,
290 				     "WL1251_ACX_INTR_INIT_COMPLETE");
291 
292 		if (--ctr == 0)
293 			break;
294 
295 		intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
296 	} while (intr);
297 
298 out_sleep:
299 	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
300 	wl1251_ps_elp_sleep(wl);
301 
302 out:
303 	mutex_unlock(&wl->mutex);
304 }
305 
wl1251_join(struct wl1251 * wl,u8 bss_type,u8 channel,u16 beacon_interval,u8 dtim_period)306 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
307 		       u16 beacon_interval, u8 dtim_period)
308 {
309 	int ret;
310 
311 	ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
312 				     DEFAULT_HW_GEN_MODULATION_TYPE,
313 				     wl->tx_mgmt_frm_rate,
314 				     wl->tx_mgmt_frm_mod);
315 	if (ret < 0)
316 		goto out;
317 
318 	/*
319 	 * Join command applies filters, and if we are not associated,
320 	 * BSSID filter must be disabled for association to work.
321 	 */
322 	if (is_zero_ether_addr(wl->bssid))
323 		wl->rx_config &= ~CFG_BSSID_FILTER_EN;
324 
325 	ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
326 			      dtim_period);
327 	if (ret < 0)
328 		goto out;
329 
330 	ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
331 	if (ret < 0)
332 		wl1251_warning("join timeout");
333 
334 out:
335 	return ret;
336 }
337 
wl1251_op_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)338 static void wl1251_op_tx(struct ieee80211_hw *hw,
339 			 struct ieee80211_tx_control *control,
340 			 struct sk_buff *skb)
341 {
342 	struct wl1251 *wl = hw->priv;
343 	unsigned long flags;
344 
345 	skb_queue_tail(&wl->tx_queue, skb);
346 
347 	/*
348 	 * The chip specific setup must run before the first TX packet -
349 	 * before that, the tx_work will not be initialized!
350 	 */
351 
352 	ieee80211_queue_work(wl->hw, &wl->tx_work);
353 
354 	/*
355 	 * The workqueue is slow to process the tx_queue and we need stop
356 	 * the queue here, otherwise the queue will get too long.
357 	 */
358 	if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
359 		wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
360 
361 		spin_lock_irqsave(&wl->wl_lock, flags);
362 		ieee80211_stop_queues(wl->hw);
363 		wl->tx_queue_stopped = true;
364 		spin_unlock_irqrestore(&wl->wl_lock, flags);
365 	}
366 }
367 
wl1251_op_start(struct ieee80211_hw * hw)368 static int wl1251_op_start(struct ieee80211_hw *hw)
369 {
370 	struct wl1251 *wl = hw->priv;
371 	struct wiphy *wiphy = hw->wiphy;
372 	int ret = 0;
373 
374 	wl1251_debug(DEBUG_MAC80211, "mac80211 start");
375 
376 	mutex_lock(&wl->mutex);
377 
378 	if (wl->state != WL1251_STATE_OFF) {
379 		wl1251_error("cannot start because not in off state: %d",
380 			     wl->state);
381 		ret = -EBUSY;
382 		goto out;
383 	}
384 
385 	ret = wl1251_chip_wakeup(wl);
386 	if (ret < 0)
387 		goto out;
388 
389 	ret = wl1251_boot(wl);
390 	if (ret < 0)
391 		goto out;
392 
393 	ret = wl1251_hw_init(wl);
394 	if (ret < 0)
395 		goto out;
396 
397 	ret = wl1251_acx_station_id(wl);
398 	if (ret < 0)
399 		goto out;
400 
401 	wl->state = WL1251_STATE_ON;
402 
403 	wl1251_info("firmware booted (%s)", wl->fw_ver);
404 
405 	/* update hw/fw version info in wiphy struct */
406 	wiphy->hw_version = wl->chip_id;
407 	strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
408 
409 out:
410 	if (ret < 0)
411 		wl1251_power_off(wl);
412 
413 	mutex_unlock(&wl->mutex);
414 
415 	return ret;
416 }
417 
wl1251_op_stop(struct ieee80211_hw * hw)418 static void wl1251_op_stop(struct ieee80211_hw *hw)
419 {
420 	struct wl1251 *wl = hw->priv;
421 
422 	wl1251_info("down");
423 
424 	wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
425 
426 	mutex_lock(&wl->mutex);
427 
428 	WARN_ON(wl->state != WL1251_STATE_ON);
429 
430 	if (wl->scanning) {
431 		struct cfg80211_scan_info info = {
432 			.aborted = true,
433 		};
434 
435 		ieee80211_scan_completed(wl->hw, &info);
436 		wl->scanning = false;
437 	}
438 
439 	wl->state = WL1251_STATE_OFF;
440 
441 	wl1251_disable_interrupts(wl);
442 
443 	mutex_unlock(&wl->mutex);
444 
445 	cancel_work_sync(&wl->irq_work);
446 	cancel_work_sync(&wl->tx_work);
447 	cancel_delayed_work_sync(&wl->elp_work);
448 
449 	mutex_lock(&wl->mutex);
450 
451 	/* let's notify MAC80211 about the remaining pending TX frames */
452 	wl1251_tx_flush(wl);
453 	wl1251_power_off(wl);
454 
455 	eth_zero_addr(wl->bssid);
456 	wl->listen_int = 1;
457 	wl->bss_type = MAX_BSS_TYPE;
458 
459 	wl->data_in_count = 0;
460 	wl->rx_counter = 0;
461 	wl->rx_handled = 0;
462 	wl->rx_current_buffer = 0;
463 	wl->rx_last_id = 0;
464 	wl->next_tx_complete = 0;
465 	wl->elp = false;
466 	wl->station_mode = STATION_ACTIVE_MODE;
467 	wl->psm_entry_retry = 0;
468 	wl->tx_queue_stopped = false;
469 	wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
470 	wl->rssi_thold = 0;
471 	wl->channel = WL1251_DEFAULT_CHANNEL;
472 	wl->monitor_present = false;
473 	wl->joined = false;
474 
475 	wl1251_debugfs_reset(wl);
476 
477 	mutex_unlock(&wl->mutex);
478 }
479 
wl1251_op_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)480 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
481 				   struct ieee80211_vif *vif)
482 {
483 	struct wl1251 *wl = hw->priv;
484 	int ret = 0;
485 
486 	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
487 			     IEEE80211_VIF_SUPPORTS_UAPSD |
488 			     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
489 
490 	wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
491 		     vif->type, vif->addr);
492 
493 	mutex_lock(&wl->mutex);
494 	if (wl->vif) {
495 		ret = -EBUSY;
496 		goto out;
497 	}
498 
499 	wl->vif = vif;
500 
501 	switch (vif->type) {
502 	case NL80211_IFTYPE_STATION:
503 		wl->bss_type = BSS_TYPE_STA_BSS;
504 		break;
505 	case NL80211_IFTYPE_ADHOC:
506 		wl->bss_type = BSS_TYPE_IBSS;
507 		break;
508 	default:
509 		ret = -EOPNOTSUPP;
510 		goto out;
511 	}
512 
513 	if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
514 		memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
515 		SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
516 		ret = wl1251_acx_station_id(wl);
517 		if (ret < 0)
518 			goto out;
519 	}
520 
521 out:
522 	mutex_unlock(&wl->mutex);
523 	return ret;
524 }
525 
wl1251_op_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)526 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
527 					 struct ieee80211_vif *vif)
528 {
529 	struct wl1251 *wl = hw->priv;
530 
531 	mutex_lock(&wl->mutex);
532 	wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
533 	wl->vif = NULL;
534 	eth_zero_addr(wl->bssid);
535 	mutex_unlock(&wl->mutex);
536 }
537 
wl1251_build_null_data(struct wl1251 * wl)538 static int wl1251_build_null_data(struct wl1251 *wl)
539 {
540 	struct sk_buff *skb = NULL;
541 	int size;
542 	void *ptr;
543 	int ret = -ENOMEM;
544 
545 	if (wl->bss_type == BSS_TYPE_IBSS) {
546 		size = sizeof(struct wl12xx_null_data_template);
547 		ptr = NULL;
548 	} else {
549 		skb = ieee80211_nullfunc_get(wl->hw, wl->vif, -1, false);
550 		if (!skb)
551 			goto out;
552 		size = skb->len;
553 		ptr = skb->data;
554 	}
555 
556 	ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
557 
558 out:
559 	dev_kfree_skb(skb);
560 	if (ret)
561 		wl1251_warning("cmd build null data failed: %d", ret);
562 
563 	return ret;
564 }
565 
wl1251_build_qos_null_data(struct wl1251 * wl)566 static int wl1251_build_qos_null_data(struct wl1251 *wl)
567 {
568 	struct ieee80211_qos_hdr template;
569 
570 	memset(&template, 0, sizeof(template));
571 
572 	memcpy(template.addr1, wl->bssid, ETH_ALEN);
573 	memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
574 	memcpy(template.addr3, wl->bssid, ETH_ALEN);
575 
576 	template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
577 					     IEEE80211_STYPE_QOS_NULLFUNC |
578 					     IEEE80211_FCTL_TODS);
579 
580 	/* FIXME: not sure what priority to use here */
581 	template.qos_ctrl = cpu_to_le16(0);
582 
583 	return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
584 				       sizeof(template));
585 }
586 
wl1251_can_do_pm(struct ieee80211_conf * conf,struct wl1251 * wl)587 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
588 {
589 	return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
590 }
591 
wl1251_op_config(struct ieee80211_hw * hw,u32 changed)592 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
593 {
594 	struct wl1251 *wl = hw->priv;
595 	struct ieee80211_conf *conf = &hw->conf;
596 	int channel, ret = 0;
597 
598 	channel = ieee80211_frequency_to_channel(
599 			conf->chandef.chan->center_freq);
600 
601 	wl1251_debug(DEBUG_MAC80211,
602 		     "mac80211 config ch %d monitor %s psm %s power %d",
603 		     channel,
604 		     conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
605 		     conf->flags & IEEE80211_CONF_PS ? "on" : "off",
606 		     conf->power_level);
607 
608 	mutex_lock(&wl->mutex);
609 
610 	ret = wl1251_ps_elp_wakeup(wl);
611 	if (ret < 0)
612 		goto out;
613 
614 	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
615 		u32 mode;
616 
617 		if (conf->flags & IEEE80211_CONF_MONITOR) {
618 			wl->monitor_present = true;
619 			mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
620 		} else {
621 			wl->monitor_present = false;
622 			mode = 0;
623 		}
624 
625 		ret = wl1251_acx_feature_cfg(wl, mode);
626 		if (ret < 0)
627 			goto out_sleep;
628 	}
629 
630 	if (channel != wl->channel) {
631 		wl->channel = channel;
632 
633 		/*
634 		 * Use ENABLE_RX command for channel switching when no
635 		 * interface is present (monitor mode only).
636 		 * This leaves the tx path disabled in firmware, whereas
637 		 * the usual JOIN command seems to transmit some frames
638 		 * at firmware level.
639 		 */
640 		if (wl->vif == NULL) {
641 			wl->joined = false;
642 			ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
643 		} else {
644 			ret = wl1251_join(wl, wl->bss_type, wl->channel,
645 					  wl->beacon_int, wl->dtim_period);
646 		}
647 		if (ret < 0)
648 			goto out_sleep;
649 	}
650 
651 	if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
652 		wl1251_debug(DEBUG_PSM, "psm enabled");
653 
654 		wl->psm_requested = true;
655 
656 		wl->dtim_period = conf->ps_dtim_period;
657 
658 		ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
659 						  wl->dtim_period);
660 
661 		/*
662 		 * mac80211 enables PSM only if we're already associated.
663 		 */
664 		ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
665 		if (ret < 0)
666 			goto out_sleep;
667 	} else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
668 		wl1251_debug(DEBUG_PSM, "psm disabled");
669 
670 		wl->psm_requested = false;
671 
672 		if (wl->station_mode != STATION_ACTIVE_MODE) {
673 			ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
674 			if (ret < 0)
675 				goto out_sleep;
676 		}
677 	}
678 
679 	if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
680 		if (conf->flags & IEEE80211_CONF_IDLE) {
681 			ret = wl1251_ps_set_mode(wl, STATION_IDLE);
682 			if (ret < 0)
683 				goto out_sleep;
684 		} else {
685 			ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
686 			if (ret < 0)
687 				goto out_sleep;
688 			ret = wl1251_join(wl, wl->bss_type, wl->channel,
689 					  wl->beacon_int, wl->dtim_period);
690 			if (ret < 0)
691 				goto out_sleep;
692 		}
693 	}
694 
695 	if (conf->power_level != wl->power_level) {
696 		ret = wl1251_acx_tx_power(wl, conf->power_level);
697 		if (ret < 0)
698 			goto out_sleep;
699 
700 		wl->power_level = conf->power_level;
701 	}
702 
703 out_sleep:
704 	wl1251_ps_elp_sleep(wl);
705 
706 out:
707 	mutex_unlock(&wl->mutex);
708 
709 	return ret;
710 }
711 
712 struct wl1251_filter_params {
713 	bool enabled;
714 	int mc_list_length;
715 	u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
716 };
717 
wl1251_op_prepare_multicast(struct ieee80211_hw * hw,struct netdev_hw_addr_list * mc_list)718 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
719 				       struct netdev_hw_addr_list *mc_list)
720 {
721 	struct wl1251_filter_params *fp;
722 	struct netdev_hw_addr *ha;
723 	struct wl1251 *wl = hw->priv;
724 
725 	if (unlikely(wl->state == WL1251_STATE_OFF))
726 		return 0;
727 
728 	fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
729 	if (!fp) {
730 		wl1251_error("Out of memory setting filters.");
731 		return 0;
732 	}
733 
734 	/* update multicast filtering parameters */
735 	fp->mc_list_length = 0;
736 	if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
737 		fp->enabled = false;
738 	} else {
739 		fp->enabled = true;
740 		netdev_hw_addr_list_for_each(ha, mc_list) {
741 			memcpy(fp->mc_list[fp->mc_list_length],
742 					ha->addr, ETH_ALEN);
743 			fp->mc_list_length++;
744 		}
745 	}
746 
747 	return (u64)(unsigned long)fp;
748 }
749 
750 #define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
751 				  FIF_FCSFAIL | \
752 				  FIF_BCN_PRBRESP_PROMISC | \
753 				  FIF_CONTROL | \
754 				  FIF_OTHER_BSS | \
755 				  FIF_PROBE_REQ)
756 
wl1251_op_configure_filter(struct ieee80211_hw * hw,unsigned int changed,unsigned int * total,u64 multicast)757 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
758 				       unsigned int changed,
759 				       unsigned int *total, u64 multicast)
760 {
761 	struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
762 	struct wl1251 *wl = hw->priv;
763 	int ret;
764 
765 	wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
766 
767 	*total &= WL1251_SUPPORTED_FILTERS;
768 	changed &= WL1251_SUPPORTED_FILTERS;
769 
770 	if (changed == 0) {
771 		/* no filters which we support changed */
772 		kfree(fp);
773 		return;
774 	}
775 
776 	mutex_lock(&wl->mutex);
777 
778 	wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
779 	wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
780 
781 	if (*total & FIF_ALLMULTI)
782 		/*
783 		 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
784 		 * all multicast frames
785 		 */
786 		wl->rx_config &= ~CFG_MC_FILTER_EN;
787 	if (*total & FIF_FCSFAIL)
788 		wl->rx_filter |= CFG_RX_FCS_ERROR;
789 	if (*total & FIF_BCN_PRBRESP_PROMISC) {
790 		wl->rx_config &= ~CFG_BSSID_FILTER_EN;
791 		wl->rx_config &= ~CFG_SSID_FILTER_EN;
792 	}
793 	if (*total & FIF_CONTROL)
794 		wl->rx_filter |= CFG_RX_CTL_EN;
795 	if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
796 		wl->rx_config &= ~CFG_BSSID_FILTER_EN;
797 	if (*total & FIF_PROBE_REQ)
798 		wl->rx_filter |= CFG_RX_PREQ_EN;
799 
800 	if (wl->state == WL1251_STATE_OFF)
801 		goto out;
802 
803 	ret = wl1251_ps_elp_wakeup(wl);
804 	if (ret < 0)
805 		goto out;
806 
807 	if (*total & FIF_ALLMULTI)
808 		ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
809 	else if (fp)
810 		ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
811 						   fp->mc_list,
812 						   fp->mc_list_length);
813 	if (ret < 0)
814 		goto out;
815 
816 	/* send filters to firmware */
817 	wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
818 
819 	wl1251_ps_elp_sleep(wl);
820 
821 out:
822 	mutex_unlock(&wl->mutex);
823 	kfree(fp);
824 }
825 
826 /* HW encryption */
wl1251_set_key_type(struct wl1251 * wl,struct wl1251_cmd_set_keys * key,enum set_key_cmd cmd,struct ieee80211_key_conf * mac80211_key,const u8 * addr)827 static int wl1251_set_key_type(struct wl1251 *wl,
828 			       struct wl1251_cmd_set_keys *key,
829 			       enum set_key_cmd cmd,
830 			       struct ieee80211_key_conf *mac80211_key,
831 			       const u8 *addr)
832 {
833 	switch (mac80211_key->cipher) {
834 	case WLAN_CIPHER_SUITE_WEP40:
835 	case WLAN_CIPHER_SUITE_WEP104:
836 		if (is_broadcast_ether_addr(addr))
837 			key->key_type = KEY_WEP_DEFAULT;
838 		else
839 			key->key_type = KEY_WEP_ADDR;
840 
841 		mac80211_key->hw_key_idx = mac80211_key->keyidx;
842 		break;
843 	case WLAN_CIPHER_SUITE_TKIP:
844 		if (is_broadcast_ether_addr(addr))
845 			key->key_type = KEY_TKIP_MIC_GROUP;
846 		else
847 			key->key_type = KEY_TKIP_MIC_PAIRWISE;
848 
849 		mac80211_key->hw_key_idx = mac80211_key->keyidx;
850 		break;
851 	case WLAN_CIPHER_SUITE_CCMP:
852 		if (is_broadcast_ether_addr(addr))
853 			key->key_type = KEY_AES_GROUP;
854 		else
855 			key->key_type = KEY_AES_PAIRWISE;
856 		mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
857 		break;
858 	default:
859 		wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
860 		return -EOPNOTSUPP;
861 	}
862 
863 	return 0;
864 }
865 
wl1251_op_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)866 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
867 			     struct ieee80211_vif *vif,
868 			     struct ieee80211_sta *sta,
869 			     struct ieee80211_key_conf *key)
870 {
871 	struct wl1251 *wl = hw->priv;
872 	struct wl1251_cmd_set_keys *wl_cmd;
873 	const u8 *addr;
874 	int ret;
875 
876 	static const u8 bcast_addr[ETH_ALEN] =
877 		{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
878 
879 	wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
880 
881 	wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
882 	if (!wl_cmd) {
883 		ret = -ENOMEM;
884 		goto out;
885 	}
886 
887 	addr = sta ? sta->addr : bcast_addr;
888 
889 	wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
890 	wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
891 	wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
892 		     key->cipher, key->keyidx, key->keylen, key->flags);
893 	wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
894 
895 	if (is_zero_ether_addr(addr)) {
896 		/* We dont support TX only encryption */
897 		ret = -EOPNOTSUPP;
898 		goto out;
899 	}
900 
901 	mutex_lock(&wl->mutex);
902 
903 	switch (cmd) {
904 	case SET_KEY:
905 		if (wl->monitor_present) {
906 			ret = -EOPNOTSUPP;
907 			goto out_unlock;
908 		}
909 		wl_cmd->key_action = KEY_ADD_OR_REPLACE;
910 		break;
911 	case DISABLE_KEY:
912 		wl_cmd->key_action = KEY_REMOVE;
913 		break;
914 	default:
915 		wl1251_error("Unsupported key cmd 0x%x", cmd);
916 		break;
917 	}
918 
919 	ret = wl1251_ps_elp_wakeup(wl);
920 	if (ret < 0)
921 		goto out_unlock;
922 
923 	ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
924 	if (ret < 0) {
925 		wl1251_error("Set KEY type failed");
926 		goto out_sleep;
927 	}
928 
929 	if (wl_cmd->key_type != KEY_WEP_DEFAULT)
930 		memcpy(wl_cmd->addr, addr, ETH_ALEN);
931 
932 	if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
933 	    (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
934 		/*
935 		 * We get the key in the following form:
936 		 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
937 		 * but the target is expecting:
938 		 * TKIP - RX MIC - TX MIC
939 		 */
940 		memcpy(wl_cmd->key, key->key, 16);
941 		memcpy(wl_cmd->key + 16, key->key + 24, 8);
942 		memcpy(wl_cmd->key + 24, key->key + 16, 8);
943 
944 	} else {
945 		memcpy(wl_cmd->key, key->key, key->keylen);
946 	}
947 	wl_cmd->key_size = key->keylen;
948 
949 	wl_cmd->id = key->keyidx;
950 	wl_cmd->ssid_profile = 0;
951 
952 	wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
953 
954 	ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
955 	if (ret < 0) {
956 		wl1251_warning("could not set keys");
957 		goto out_sleep;
958 	}
959 
960 out_sleep:
961 	wl1251_ps_elp_sleep(wl);
962 
963 out_unlock:
964 	mutex_unlock(&wl->mutex);
965 
966 out:
967 	kfree(wl_cmd);
968 
969 	return ret;
970 }
971 
wl1251_op_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)972 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
973 			     struct ieee80211_vif *vif,
974 			     struct ieee80211_scan_request *hw_req)
975 {
976 	struct cfg80211_scan_request *req = &hw_req->req;
977 	struct wl1251 *wl = hw->priv;
978 	struct sk_buff *skb;
979 	size_t ssid_len = 0;
980 	u8 *ssid = NULL;
981 	int ret;
982 
983 	wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
984 
985 	if (req->n_ssids) {
986 		ssid = req->ssids[0].ssid;
987 		ssid_len = req->ssids[0].ssid_len;
988 	}
989 
990 	mutex_lock(&wl->mutex);
991 
992 	if (wl->scanning) {
993 		wl1251_debug(DEBUG_SCAN, "scan already in progress");
994 		ret = -EINVAL;
995 		goto out;
996 	}
997 
998 	ret = wl1251_ps_elp_wakeup(wl);
999 	if (ret < 0)
1000 		goto out;
1001 
1002 	if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1003 		ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1004 		if (ret < 0)
1005 			goto out_sleep;
1006 		ret = wl1251_join(wl, wl->bss_type, wl->channel,
1007 				  wl->beacon_int, wl->dtim_period);
1008 		if (ret < 0)
1009 			goto out_sleep;
1010 	}
1011 
1012 	skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1013 				     req->ie_len);
1014 	if (!skb) {
1015 		ret = -ENOMEM;
1016 		goto out_idle;
1017 	}
1018 	if (req->ie_len)
1019 		skb_put_data(skb, req->ie, req->ie_len);
1020 
1021 	ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1022 				      skb->len);
1023 	dev_kfree_skb(skb);
1024 	if (ret < 0)
1025 		goto out_idle;
1026 
1027 	ret = wl1251_cmd_trigger_scan_to(wl, 0);
1028 	if (ret < 0)
1029 		goto out_idle;
1030 
1031 	wl->scanning = true;
1032 
1033 	ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1034 			      req->n_channels, WL1251_SCAN_NUM_PROBES);
1035 	if (ret < 0) {
1036 		wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1037 		wl->scanning = false;
1038 		goto out_idle;
1039 	}
1040 	goto out_sleep;
1041 
1042 out_idle:
1043 	if (hw->conf.flags & IEEE80211_CONF_IDLE)
1044 		ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1045 out_sleep:
1046 	wl1251_ps_elp_sleep(wl);
1047 
1048 out:
1049 	mutex_unlock(&wl->mutex);
1050 
1051 	return ret;
1052 }
1053 
wl1251_op_set_rts_threshold(struct ieee80211_hw * hw,u32 value)1054 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1055 {
1056 	struct wl1251 *wl = hw->priv;
1057 	int ret;
1058 
1059 	mutex_lock(&wl->mutex);
1060 
1061 	ret = wl1251_ps_elp_wakeup(wl);
1062 	if (ret < 0)
1063 		goto out;
1064 
1065 	ret = wl1251_acx_rts_threshold(wl, (u16) value);
1066 	if (ret < 0)
1067 		wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1068 
1069 	wl1251_ps_elp_sleep(wl);
1070 
1071 out:
1072 	mutex_unlock(&wl->mutex);
1073 
1074 	return ret;
1075 }
1076 
wl1251_op_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * bss_conf,u64 changed)1077 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1078 				       struct ieee80211_vif *vif,
1079 				       struct ieee80211_bss_conf *bss_conf,
1080 				       u64 changed)
1081 {
1082 	struct wl1251 *wl = hw->priv;
1083 	struct sk_buff *beacon, *skb;
1084 	bool enable;
1085 	int ret;
1086 
1087 	wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1088 
1089 	mutex_lock(&wl->mutex);
1090 
1091 	ret = wl1251_ps_elp_wakeup(wl);
1092 	if (ret < 0)
1093 		goto out;
1094 
1095 	if (changed & BSS_CHANGED_CQM) {
1096 		ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1097 					  WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1098 					  WL1251_DEFAULT_LOW_RSSI_DEPTH,
1099 					  WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1100 		if (ret < 0)
1101 			goto out;
1102 		wl->rssi_thold = bss_conf->cqm_rssi_thold;
1103 	}
1104 
1105 	if ((changed & BSS_CHANGED_BSSID) &&
1106 	    memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1107 		memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1108 
1109 		if (!is_zero_ether_addr(wl->bssid)) {
1110 			ret = wl1251_build_null_data(wl);
1111 			if (ret < 0)
1112 				goto out_sleep;
1113 
1114 			ret = wl1251_build_qos_null_data(wl);
1115 			if (ret < 0)
1116 				goto out_sleep;
1117 
1118 			ret = wl1251_join(wl, wl->bss_type, wl->channel,
1119 					  wl->beacon_int, wl->dtim_period);
1120 			if (ret < 0)
1121 				goto out_sleep;
1122 		}
1123 	}
1124 
1125 	if (changed & BSS_CHANGED_ASSOC) {
1126 		if (vif->cfg.assoc) {
1127 			wl->beacon_int = bss_conf->beacon_int;
1128 
1129 			skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1130 			if (!skb)
1131 				goto out_sleep;
1132 
1133 			ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1134 						      skb->data,
1135 						      skb->len);
1136 			dev_kfree_skb(skb);
1137 			if (ret < 0)
1138 				goto out_sleep;
1139 
1140 			ret = wl1251_acx_aid(wl, vif->cfg.aid);
1141 			if (ret < 0)
1142 				goto out_sleep;
1143 		} else {
1144 			/* use defaults when not associated */
1145 			wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1146 			wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1147 		}
1148 	}
1149 	if (changed & BSS_CHANGED_ERP_SLOT) {
1150 		if (bss_conf->use_short_slot)
1151 			ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1152 		else
1153 			ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1154 		if (ret < 0) {
1155 			wl1251_warning("Set slot time failed %d", ret);
1156 			goto out_sleep;
1157 		}
1158 	}
1159 
1160 	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1161 		if (bss_conf->use_short_preamble)
1162 			wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1163 		else
1164 			wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1165 	}
1166 
1167 	if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1168 		if (bss_conf->use_cts_prot)
1169 			ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1170 		else
1171 			ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1172 		if (ret < 0) {
1173 			wl1251_warning("Set ctsprotect failed %d", ret);
1174 			goto out_sleep;
1175 		}
1176 	}
1177 
1178 	if (changed & BSS_CHANGED_ARP_FILTER) {
1179 		__be32 addr = vif->cfg.arp_addr_list[0];
1180 		WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1181 
1182 		enable = vif->cfg.arp_addr_cnt == 1 && vif->cfg.assoc;
1183 		ret = wl1251_acx_arp_ip_filter(wl, enable, addr);
1184 		if (ret < 0)
1185 			goto out_sleep;
1186 	}
1187 
1188 	if (changed & BSS_CHANGED_BEACON) {
1189 		beacon = ieee80211_beacon_get(hw, vif, 0);
1190 		if (!beacon)
1191 			goto out_sleep;
1192 
1193 		ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1194 					      beacon->len);
1195 
1196 		if (ret < 0) {
1197 			dev_kfree_skb(beacon);
1198 			goto out_sleep;
1199 		}
1200 
1201 		ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1202 					      beacon->len);
1203 
1204 		dev_kfree_skb(beacon);
1205 
1206 		if (ret < 0)
1207 			goto out_sleep;
1208 
1209 		ret = wl1251_join(wl, wl->bss_type, wl->channel,
1210 				  wl->beacon_int, wl->dtim_period);
1211 
1212 		if (ret < 0)
1213 			goto out_sleep;
1214 	}
1215 
1216 out_sleep:
1217 	wl1251_ps_elp_sleep(wl);
1218 
1219 out:
1220 	mutex_unlock(&wl->mutex);
1221 }
1222 
1223 
1224 /* can't be const, mac80211 writes to this */
1225 static struct ieee80211_rate wl1251_rates[] = {
1226 	{ .bitrate = 10,
1227 	  .hw_value = 0x1,
1228 	  .hw_value_short = 0x1, },
1229 	{ .bitrate = 20,
1230 	  .hw_value = 0x2,
1231 	  .hw_value_short = 0x2,
1232 	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1233 	{ .bitrate = 55,
1234 	  .hw_value = 0x4,
1235 	  .hw_value_short = 0x4,
1236 	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1237 	{ .bitrate = 110,
1238 	  .hw_value = 0x20,
1239 	  .hw_value_short = 0x20,
1240 	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1241 	{ .bitrate = 60,
1242 	  .hw_value = 0x8,
1243 	  .hw_value_short = 0x8, },
1244 	{ .bitrate = 90,
1245 	  .hw_value = 0x10,
1246 	  .hw_value_short = 0x10, },
1247 	{ .bitrate = 120,
1248 	  .hw_value = 0x40,
1249 	  .hw_value_short = 0x40, },
1250 	{ .bitrate = 180,
1251 	  .hw_value = 0x80,
1252 	  .hw_value_short = 0x80, },
1253 	{ .bitrate = 240,
1254 	  .hw_value = 0x200,
1255 	  .hw_value_short = 0x200, },
1256 	{ .bitrate = 360,
1257 	 .hw_value = 0x400,
1258 	 .hw_value_short = 0x400, },
1259 	{ .bitrate = 480,
1260 	  .hw_value = 0x800,
1261 	  .hw_value_short = 0x800, },
1262 	{ .bitrate = 540,
1263 	  .hw_value = 0x1000,
1264 	  .hw_value_short = 0x1000, },
1265 };
1266 
1267 /* can't be const, mac80211 writes to this */
1268 static struct ieee80211_channel wl1251_channels[] = {
1269 	{ .hw_value = 1, .center_freq = 2412},
1270 	{ .hw_value = 2, .center_freq = 2417},
1271 	{ .hw_value = 3, .center_freq = 2422},
1272 	{ .hw_value = 4, .center_freq = 2427},
1273 	{ .hw_value = 5, .center_freq = 2432},
1274 	{ .hw_value = 6, .center_freq = 2437},
1275 	{ .hw_value = 7, .center_freq = 2442},
1276 	{ .hw_value = 8, .center_freq = 2447},
1277 	{ .hw_value = 9, .center_freq = 2452},
1278 	{ .hw_value = 10, .center_freq = 2457},
1279 	{ .hw_value = 11, .center_freq = 2462},
1280 	{ .hw_value = 12, .center_freq = 2467},
1281 	{ .hw_value = 13, .center_freq = 2472},
1282 };
1283 
wl1251_op_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)1284 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1285 			     struct ieee80211_vif *vif,
1286 			     unsigned int link_id, u16 queue,
1287 			     const struct ieee80211_tx_queue_params *params)
1288 {
1289 	enum wl1251_acx_ps_scheme ps_scheme;
1290 	struct wl1251 *wl = hw->priv;
1291 	int ret;
1292 
1293 	mutex_lock(&wl->mutex);
1294 
1295 	wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1296 
1297 	ret = wl1251_ps_elp_wakeup(wl);
1298 	if (ret < 0)
1299 		goto out;
1300 
1301 	/* mac80211 uses units of 32 usec */
1302 	ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1303 				params->cw_min, params->cw_max,
1304 				params->aifs, params->txop * 32);
1305 	if (ret < 0)
1306 		goto out_sleep;
1307 
1308 	if (params->uapsd)
1309 		ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1310 	else
1311 		ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1312 
1313 	ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1314 				 CHANNEL_TYPE_EDCF,
1315 				 wl1251_tx_get_queue(queue), ps_scheme,
1316 				 WL1251_ACX_ACK_POLICY_LEGACY);
1317 	if (ret < 0)
1318 		goto out_sleep;
1319 
1320 out_sleep:
1321 	wl1251_ps_elp_sleep(wl);
1322 
1323 out:
1324 	mutex_unlock(&wl->mutex);
1325 
1326 	return ret;
1327 }
1328 
wl1251_op_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)1329 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1330 				struct survey_info *survey)
1331 {
1332 	struct wl1251 *wl = hw->priv;
1333 	struct ieee80211_conf *conf = &hw->conf;
1334 
1335 	if (idx != 0)
1336 		return -ENOENT;
1337 
1338 	survey->channel = conf->chandef.chan;
1339 	survey->filled = SURVEY_INFO_NOISE_DBM;
1340 	survey->noise = wl->noise;
1341 
1342 	return 0;
1343 }
1344 
1345 /* can't be const, mac80211 writes to this */
1346 static struct ieee80211_supported_band wl1251_band_2ghz = {
1347 	.channels = wl1251_channels,
1348 	.n_channels = ARRAY_SIZE(wl1251_channels),
1349 	.bitrates = wl1251_rates,
1350 	.n_bitrates = ARRAY_SIZE(wl1251_rates),
1351 };
1352 
1353 static const struct ieee80211_ops wl1251_ops = {
1354 	.start = wl1251_op_start,
1355 	.stop = wl1251_op_stop,
1356 	.add_interface = wl1251_op_add_interface,
1357 	.remove_interface = wl1251_op_remove_interface,
1358 	.config = wl1251_op_config,
1359 	.prepare_multicast = wl1251_op_prepare_multicast,
1360 	.configure_filter = wl1251_op_configure_filter,
1361 	.tx = wl1251_op_tx,
1362 	.wake_tx_queue = ieee80211_handle_wake_tx_queue,
1363 	.set_key = wl1251_op_set_key,
1364 	.hw_scan = wl1251_op_hw_scan,
1365 	.bss_info_changed = wl1251_op_bss_info_changed,
1366 	.set_rts_threshold = wl1251_op_set_rts_threshold,
1367 	.conf_tx = wl1251_op_conf_tx,
1368 	.get_survey = wl1251_op_get_survey,
1369 };
1370 
wl1251_read_eeprom_byte(struct wl1251 * wl,off_t offset,u8 * data)1371 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1372 {
1373 	unsigned long timeout;
1374 
1375 	wl1251_reg_write32(wl, EE_ADDR, offset);
1376 	wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1377 
1378 	/* EE_CTL_READ clears when data is ready */
1379 	timeout = jiffies + msecs_to_jiffies(100);
1380 	while (1) {
1381 		if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1382 			break;
1383 
1384 		if (time_after(jiffies, timeout))
1385 			return -ETIMEDOUT;
1386 
1387 		msleep(1);
1388 	}
1389 
1390 	*data = wl1251_reg_read32(wl, EE_DATA);
1391 	return 0;
1392 }
1393 
wl1251_read_eeprom(struct wl1251 * wl,off_t offset,u8 * data,size_t len)1394 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1395 			      u8 *data, size_t len)
1396 {
1397 	size_t i;
1398 	int ret;
1399 
1400 	wl1251_reg_write32(wl, EE_START, 0);
1401 
1402 	for (i = 0; i < len; i++) {
1403 		ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1404 		if (ret < 0)
1405 			return ret;
1406 	}
1407 
1408 	return 0;
1409 }
1410 
wl1251_read_eeprom_mac(struct wl1251 * wl)1411 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1412 {
1413 	u8 mac[ETH_ALEN];
1414 	int i, ret;
1415 
1416 	wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1417 
1418 	ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1419 	if (ret < 0) {
1420 		wl1251_warning("failed to read MAC address from EEPROM");
1421 		return ret;
1422 	}
1423 
1424 	/* MAC is stored in reverse order */
1425 	for (i = 0; i < ETH_ALEN; i++)
1426 		wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1427 
1428 	return 0;
1429 }
1430 
1431 #define NVS_OFF_MAC_LEN 0x19
1432 #define NVS_OFF_MAC_ADDR_LO 0x1a
1433 #define NVS_OFF_MAC_ADDR_HI 0x1b
1434 #define NVS_OFF_MAC_DATA 0x1c
1435 
wl1251_check_nvs_mac(struct wl1251 * wl)1436 static int wl1251_check_nvs_mac(struct wl1251 *wl)
1437 {
1438 	if (wl->nvs_len < 0x24)
1439 		return -ENODATA;
1440 
1441 	/* length is 2 and data address is 0x546c (ANDed with 0xfffe) */
1442 	if (wl->nvs[NVS_OFF_MAC_LEN] != 2 ||
1443 	    wl->nvs[NVS_OFF_MAC_ADDR_LO] != 0x6d ||
1444 	    wl->nvs[NVS_OFF_MAC_ADDR_HI] != 0x54)
1445 		return -EINVAL;
1446 
1447 	return 0;
1448 }
1449 
wl1251_read_nvs_mac(struct wl1251 * wl)1450 static int wl1251_read_nvs_mac(struct wl1251 *wl)
1451 {
1452 	u8 mac[ETH_ALEN];
1453 	int i, ret;
1454 
1455 	ret = wl1251_check_nvs_mac(wl);
1456 	if (ret)
1457 		return ret;
1458 
1459 	/* MAC is stored in reverse order */
1460 	for (i = 0; i < ETH_ALEN; i++)
1461 		mac[i] = wl->nvs[NVS_OFF_MAC_DATA + ETH_ALEN - i - 1];
1462 
1463 	/* 00:00:20:07:03:09 is in example file wl1251-nvs.bin, so invalid */
1464 	if (ether_addr_equal_unaligned(mac, "\x00\x00\x20\x07\x03\x09"))
1465 		return -EINVAL;
1466 
1467 	memcpy(wl->mac_addr, mac, ETH_ALEN);
1468 	return 0;
1469 }
1470 
wl1251_write_nvs_mac(struct wl1251 * wl)1471 static int wl1251_write_nvs_mac(struct wl1251 *wl)
1472 {
1473 	int i, ret;
1474 
1475 	ret = wl1251_check_nvs_mac(wl);
1476 	if (ret)
1477 		return ret;
1478 
1479 	/* MAC is stored in reverse order */
1480 	for (i = 0; i < ETH_ALEN; i++)
1481 		wl->nvs[NVS_OFF_MAC_DATA + i] = wl->mac_addr[ETH_ALEN - i - 1];
1482 
1483 	return 0;
1484 }
1485 
wl1251_register_hw(struct wl1251 * wl)1486 static int wl1251_register_hw(struct wl1251 *wl)
1487 {
1488 	int ret;
1489 
1490 	if (wl->mac80211_registered)
1491 		return 0;
1492 
1493 	SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1494 
1495 	ret = ieee80211_register_hw(wl->hw);
1496 	if (ret < 0) {
1497 		wl1251_error("unable to register mac80211 hw: %d", ret);
1498 		return ret;
1499 	}
1500 
1501 	wl->mac80211_registered = true;
1502 
1503 	wl1251_notice("loaded");
1504 
1505 	return 0;
1506 }
1507 
wl1251_init_ieee80211(struct wl1251 * wl)1508 int wl1251_init_ieee80211(struct wl1251 *wl)
1509 {
1510 	int ret;
1511 
1512 	/* The tx descriptor buffer and the TKIP space */
1513 	wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1514 		+ WL1251_TKIP_IV_SPACE;
1515 
1516 	/* unit us */
1517 	/* FIXME: find a proper value */
1518 
1519 	ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1520 	ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1521 
1522 	wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1523 					 BIT(NL80211_IFTYPE_ADHOC);
1524 	wl->hw->wiphy->max_scan_ssids = 1;
1525 
1526 	/* We set max_scan_ie_len to a random value to make wpa_supplicant scans not
1527 	 * fail, as the driver will the ignore the extra passed IEs anyway
1528 	 */
1529 	wl->hw->wiphy->max_scan_ie_len = 512;
1530 
1531 	wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1532 
1533 	wl->hw->queues = 4;
1534 
1535 	if (wl->nvs == NULL && !wl->use_eeprom) {
1536 		ret = wl1251_fetch_nvs(wl);
1537 		if (ret < 0)
1538 			goto out;
1539 	}
1540 
1541 	if (wl->use_eeprom)
1542 		ret = wl1251_read_eeprom_mac(wl);
1543 	else
1544 		ret = wl1251_read_nvs_mac(wl);
1545 
1546 	if (ret == 0 && !is_valid_ether_addr(wl->mac_addr))
1547 		ret = -EINVAL;
1548 
1549 	if (ret < 0) {
1550 		/*
1551 		 * In case our MAC address is not correctly set,
1552 		 * we use a random but Nokia MAC.
1553 		 */
1554 		static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1555 		memcpy(wl->mac_addr, nokia_oui, 3);
1556 		get_random_bytes(wl->mac_addr + 3, 3);
1557 		if (!wl->use_eeprom)
1558 			wl1251_write_nvs_mac(wl);
1559 		wl1251_warning("MAC address in eeprom or nvs data is not valid");
1560 		wl1251_warning("Setting random MAC address: %pM", wl->mac_addr);
1561 	}
1562 
1563 	ret = wl1251_register_hw(wl);
1564 	if (ret)
1565 		goto out;
1566 
1567 	wl1251_debugfs_init(wl);
1568 	wl1251_notice("initialized");
1569 
1570 	ret = 0;
1571 
1572 out:
1573 	return ret;
1574 }
1575 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1576 
wl1251_alloc_hw(void)1577 struct ieee80211_hw *wl1251_alloc_hw(void)
1578 {
1579 	struct ieee80211_hw *hw;
1580 	struct wl1251 *wl;
1581 	int i;
1582 
1583 	hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1584 	if (!hw) {
1585 		wl1251_error("could not alloc ieee80211_hw");
1586 		return ERR_PTR(-ENOMEM);
1587 	}
1588 
1589 	wl = hw->priv;
1590 	memset(wl, 0, sizeof(*wl));
1591 
1592 	wl->hw = hw;
1593 
1594 	wl->data_in_count = 0;
1595 
1596 	skb_queue_head_init(&wl->tx_queue);
1597 
1598 	INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1599 	wl->channel = WL1251_DEFAULT_CHANNEL;
1600 	wl->monitor_present = false;
1601 	wl->joined = false;
1602 	wl->scanning = false;
1603 	wl->bss_type = MAX_BSS_TYPE;
1604 	wl->default_key = 0;
1605 	wl->listen_int = 1;
1606 	wl->rx_counter = 0;
1607 	wl->rx_handled = 0;
1608 	wl->rx_current_buffer = 0;
1609 	wl->rx_last_id = 0;
1610 	wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1611 	wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1612 	wl->elp = false;
1613 	wl->station_mode = STATION_ACTIVE_MODE;
1614 	wl->psm_requested = false;
1615 	wl->psm_entry_retry = 0;
1616 	wl->tx_queue_stopped = false;
1617 	wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1618 	wl->rssi_thold = 0;
1619 	wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1620 	wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1621 	wl->vif = NULL;
1622 
1623 	for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1624 		wl->tx_frames[i] = NULL;
1625 
1626 	wl->next_tx_complete = 0;
1627 
1628 	INIT_WORK(&wl->irq_work, wl1251_irq_work);
1629 	INIT_WORK(&wl->tx_work, wl1251_tx_work);
1630 
1631 	wl->state = WL1251_STATE_OFF;
1632 	mutex_init(&wl->mutex);
1633 	spin_lock_init(&wl->wl_lock);
1634 
1635 	wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1636 	wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1637 
1638 	wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1639 	if (!wl->rx_descriptor) {
1640 		wl1251_error("could not allocate memory for rx descriptor");
1641 		ieee80211_free_hw(hw);
1642 		return ERR_PTR(-ENOMEM);
1643 	}
1644 
1645 	return hw;
1646 }
1647 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1648 
wl1251_free_hw(struct wl1251 * wl)1649 int wl1251_free_hw(struct wl1251 *wl)
1650 {
1651 	ieee80211_unregister_hw(wl->hw);
1652 
1653 	wl1251_debugfs_exit(wl);
1654 
1655 	kfree(wl->target_mem_map);
1656 	kfree(wl->data_path);
1657 	vfree(wl->fw);
1658 	wl->fw = NULL;
1659 	kfree(wl->nvs);
1660 	wl->nvs = NULL;
1661 
1662 	kfree(wl->rx_descriptor);
1663 	wl->rx_descriptor = NULL;
1664 
1665 	ieee80211_free_hw(wl->hw);
1666 
1667 	return 0;
1668 }
1669 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1670 
1671 MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1672 MODULE_LICENSE("GPL");
1673 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1674 MODULE_FIRMWARE(WL1251_FW_NAME);
1675 MODULE_FIRMWARE(WL1251_NVS_NAME);
1676