1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
4  * All rights reserved.
5  */
6 
7 #include <linux/if_ether.h>
8 #include <linux/ip.h>
9 #include <net/dsfield.h>
10 #include "cfg80211.h"
11 #include "wlan_cfg.h"
12 
13 #define WAKE_UP_TRIAL_RETRY		10000
14 
is_wilc1000(u32 id)15 static inline bool is_wilc1000(u32 id)
16 {
17 	return (id & (~WILC_CHIP_REV_FIELD)) == WILC_1000_BASE_ID;
18 }
19 
acquire_bus(struct wilc * wilc,enum bus_acquire acquire)20 static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
21 {
22 	mutex_lock(&wilc->hif_cs);
23 	if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode)
24 		chip_wakeup(wilc);
25 }
26 
release_bus(struct wilc * wilc,enum bus_release release)27 static inline void release_bus(struct wilc *wilc, enum bus_release release)
28 {
29 	if (release == WILC_BUS_RELEASE_ALLOW_SLEEP && wilc->power_save_mode)
30 		chip_allow_sleep(wilc);
31 	mutex_unlock(&wilc->hif_cs);
32 }
33 
wilc_wlan_txq_remove(struct wilc * wilc,u8 q_num,struct txq_entry_t * tqe)34 static void wilc_wlan_txq_remove(struct wilc *wilc, u8 q_num,
35 				 struct txq_entry_t *tqe)
36 {
37 	list_del(&tqe->list);
38 	wilc->txq_entries -= 1;
39 	wilc->txq[q_num].count--;
40 }
41 
42 static struct txq_entry_t *
wilc_wlan_txq_remove_from_head(struct wilc * wilc,u8 q_num)43 wilc_wlan_txq_remove_from_head(struct wilc *wilc, u8 q_num)
44 {
45 	struct txq_entry_t *tqe = NULL;
46 	unsigned long flags;
47 
48 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
49 
50 	if (!list_empty(&wilc->txq[q_num].txq_head.list)) {
51 		tqe = list_first_entry(&wilc->txq[q_num].txq_head.list,
52 				       struct txq_entry_t, list);
53 		list_del(&tqe->list);
54 		wilc->txq_entries -= 1;
55 		wilc->txq[q_num].count--;
56 	}
57 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
58 	return tqe;
59 }
60 
wilc_wlan_txq_add_to_tail(struct net_device * dev,u8 q_num,struct txq_entry_t * tqe)61 static void wilc_wlan_txq_add_to_tail(struct net_device *dev, u8 q_num,
62 				      struct txq_entry_t *tqe)
63 {
64 	unsigned long flags;
65 	struct wilc_vif *vif = netdev_priv(dev);
66 	struct wilc *wilc = vif->wilc;
67 
68 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
69 
70 	list_add_tail(&tqe->list, &wilc->txq[q_num].txq_head.list);
71 	wilc->txq_entries += 1;
72 	wilc->txq[q_num].count++;
73 
74 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
75 
76 	complete(&wilc->txq_event);
77 }
78 
wilc_wlan_txq_add_to_head(struct wilc_vif * vif,u8 q_num,struct txq_entry_t * tqe)79 static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif, u8 q_num,
80 				      struct txq_entry_t *tqe)
81 {
82 	unsigned long flags;
83 	struct wilc *wilc = vif->wilc;
84 
85 	mutex_lock(&wilc->txq_add_to_head_cs);
86 
87 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
88 
89 	list_add(&tqe->list, &wilc->txq[q_num].txq_head.list);
90 	wilc->txq_entries += 1;
91 	wilc->txq[q_num].count++;
92 
93 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
94 	mutex_unlock(&wilc->txq_add_to_head_cs);
95 	complete(&wilc->txq_event);
96 }
97 
98 #define NOT_TCP_ACK			(-1)
99 
add_tcp_session(struct wilc_vif * vif,u32 src_prt,u32 dst_prt,u32 seq)100 static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
101 				   u32 dst_prt, u32 seq)
102 {
103 	struct tcp_ack_filter *f = &vif->ack_filter;
104 
105 	if (f->tcp_session < 2 * MAX_TCP_SESSION) {
106 		f->ack_session_info[f->tcp_session].seq_num = seq;
107 		f->ack_session_info[f->tcp_session].bigger_ack_num = 0;
108 		f->ack_session_info[f->tcp_session].src_port = src_prt;
109 		f->ack_session_info[f->tcp_session].dst_port = dst_prt;
110 		f->tcp_session++;
111 	}
112 }
113 
update_tcp_session(struct wilc_vif * vif,u32 index,u32 ack)114 static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
115 {
116 	struct tcp_ack_filter *f = &vif->ack_filter;
117 
118 	if (index < 2 * MAX_TCP_SESSION &&
119 	    ack > f->ack_session_info[index].bigger_ack_num)
120 		f->ack_session_info[index].bigger_ack_num = ack;
121 }
122 
add_tcp_pending_ack(struct wilc_vif * vif,u32 ack,u32 session_index,struct txq_entry_t * txqe)123 static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
124 				       u32 session_index,
125 				       struct txq_entry_t *txqe)
126 {
127 	struct tcp_ack_filter *f = &vif->ack_filter;
128 	u32 i = f->pending_base + f->pending_acks_idx;
129 
130 	if (i < MAX_PENDING_ACKS) {
131 		f->pending_acks[i].ack_num = ack;
132 		f->pending_acks[i].txqe = txqe;
133 		f->pending_acks[i].session_index = session_index;
134 		txqe->ack_idx = i;
135 		f->pending_acks_idx++;
136 	}
137 }
138 
tcp_process(struct net_device * dev,struct txq_entry_t * tqe)139 static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
140 {
141 	void *buffer = tqe->buffer;
142 	const struct ethhdr *eth_hdr_ptr = buffer;
143 	int i;
144 	unsigned long flags;
145 	struct wilc_vif *vif = netdev_priv(dev);
146 	struct wilc *wilc = vif->wilc;
147 	struct tcp_ack_filter *f = &vif->ack_filter;
148 	const struct iphdr *ip_hdr_ptr;
149 	const struct tcphdr *tcp_hdr_ptr;
150 	u32 ihl, total_length, data_offset;
151 
152 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
153 
154 	if (eth_hdr_ptr->h_proto != htons(ETH_P_IP))
155 		goto out;
156 
157 	ip_hdr_ptr = buffer + ETH_HLEN;
158 
159 	if (ip_hdr_ptr->protocol != IPPROTO_TCP)
160 		goto out;
161 
162 	ihl = ip_hdr_ptr->ihl << 2;
163 	tcp_hdr_ptr = buffer + ETH_HLEN + ihl;
164 	total_length = ntohs(ip_hdr_ptr->tot_len);
165 
166 	data_offset = tcp_hdr_ptr->doff << 2;
167 	if (total_length == (ihl + data_offset)) {
168 		u32 seq_no, ack_no;
169 
170 		seq_no = ntohl(tcp_hdr_ptr->seq);
171 		ack_no = ntohl(tcp_hdr_ptr->ack_seq);
172 		for (i = 0; i < f->tcp_session; i++) {
173 			u32 j = f->ack_session_info[i].seq_num;
174 
175 			if (i < 2 * MAX_TCP_SESSION &&
176 			    j == seq_no) {
177 				update_tcp_session(vif, i, ack_no);
178 				break;
179 			}
180 		}
181 		if (i == f->tcp_session)
182 			add_tcp_session(vif, 0, 0, seq_no);
183 
184 		add_tcp_pending_ack(vif, ack_no, i, tqe);
185 	}
186 
187 out:
188 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
189 }
190 
wilc_wlan_txq_filter_dup_tcp_ack(struct net_device * dev)191 static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
192 {
193 	struct wilc_vif *vif = netdev_priv(dev);
194 	struct wilc *wilc = vif->wilc;
195 	struct tcp_ack_filter *f = &vif->ack_filter;
196 	u32 i = 0;
197 	u32 dropped = 0;
198 	unsigned long flags;
199 
200 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
201 	for (i = f->pending_base;
202 	     i < (f->pending_base + f->pending_acks_idx); i++) {
203 		u32 index;
204 		u32 bigger_ack_num;
205 
206 		if (i >= MAX_PENDING_ACKS)
207 			break;
208 
209 		index = f->pending_acks[i].session_index;
210 
211 		if (index >= 2 * MAX_TCP_SESSION)
212 			break;
213 
214 		bigger_ack_num = f->ack_session_info[index].bigger_ack_num;
215 
216 		if (f->pending_acks[i].ack_num < bigger_ack_num) {
217 			struct txq_entry_t *tqe;
218 
219 			tqe = f->pending_acks[i].txqe;
220 			if (tqe) {
221 				wilc_wlan_txq_remove(wilc, tqe->q_num, tqe);
222 				tqe->status = 1;
223 				if (tqe->tx_complete_func)
224 					tqe->tx_complete_func(tqe->priv,
225 							      tqe->status);
226 				kfree(tqe);
227 				dropped++;
228 			}
229 		}
230 	}
231 	f->pending_acks_idx = 0;
232 	f->tcp_session = 0;
233 
234 	if (f->pending_base == 0)
235 		f->pending_base = MAX_TCP_SESSION;
236 	else
237 		f->pending_base = 0;
238 
239 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
240 
241 	while (dropped > 0) {
242 		wait_for_completion_timeout(&wilc->txq_event,
243 					    msecs_to_jiffies(1));
244 		dropped--;
245 	}
246 }
247 
wilc_enable_tcp_ack_filter(struct wilc_vif * vif,bool value)248 void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
249 {
250 	vif->ack_filter.enabled = value;
251 }
252 
wilc_wlan_txq_add_cfg_pkt(struct wilc_vif * vif,u8 * buffer,u32 buffer_size)253 static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, u8 *buffer,
254 				     u32 buffer_size)
255 {
256 	struct txq_entry_t *tqe;
257 	struct wilc *wilc = vif->wilc;
258 
259 	netdev_dbg(vif->ndev, "Adding config packet ...\n");
260 	if (wilc->quit) {
261 		netdev_dbg(vif->ndev, "Return due to clear function\n");
262 		complete(&wilc->cfg_event);
263 		return 0;
264 	}
265 
266 	tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
267 	if (!tqe) {
268 		complete(&wilc->cfg_event);
269 		return 0;
270 	}
271 
272 	tqe->type = WILC_CFG_PKT;
273 	tqe->buffer = buffer;
274 	tqe->buffer_size = buffer_size;
275 	tqe->tx_complete_func = NULL;
276 	tqe->priv = NULL;
277 	tqe->q_num = AC_VO_Q;
278 	tqe->ack_idx = NOT_TCP_ACK;
279 	tqe->vif = vif;
280 
281 	wilc_wlan_txq_add_to_head(vif, AC_VO_Q, tqe);
282 
283 	return 1;
284 }
285 
is_ac_q_limit(struct wilc * wl,u8 q_num)286 static bool is_ac_q_limit(struct wilc *wl, u8 q_num)
287 {
288 	u8 factors[NQUEUES] = {1, 1, 1, 1};
289 	u16 i;
290 	unsigned long flags;
291 	struct wilc_tx_queue_status *q = &wl->tx_q_limit;
292 	u8 end_index;
293 	u8 q_limit;
294 	bool ret = false;
295 
296 	spin_lock_irqsave(&wl->txq_spinlock, flags);
297 	if (!q->initialized) {
298 		for (i = 0; i < AC_BUFFER_SIZE; i++)
299 			q->buffer[i] = i % NQUEUES;
300 
301 		for (i = 0; i < NQUEUES; i++) {
302 			q->cnt[i] = AC_BUFFER_SIZE * factors[i] / NQUEUES;
303 			q->sum += q->cnt[i];
304 		}
305 		q->end_index = AC_BUFFER_SIZE - 1;
306 		q->initialized = 1;
307 	}
308 
309 	end_index = q->end_index;
310 	q->cnt[q->buffer[end_index]] -= factors[q->buffer[end_index]];
311 	q->cnt[q_num] += factors[q_num];
312 	q->sum += (factors[q_num] - factors[q->buffer[end_index]]);
313 
314 	q->buffer[end_index] = q_num;
315 	if (end_index > 0)
316 		q->end_index--;
317 	else
318 		q->end_index = AC_BUFFER_SIZE - 1;
319 
320 	if (!q->sum)
321 		q_limit = 1;
322 	else
323 		q_limit = (q->cnt[q_num] * FLOW_CONTROL_UPPER_THRESHOLD / q->sum) + 1;
324 
325 	if (wl->txq[q_num].count <= q_limit)
326 		ret = true;
327 
328 	spin_unlock_irqrestore(&wl->txq_spinlock, flags);
329 
330 	return ret;
331 }
332 
ac_classify(struct wilc * wilc,struct sk_buff * skb)333 static inline u8 ac_classify(struct wilc *wilc, struct sk_buff *skb)
334 {
335 	u8 q_num = AC_BE_Q;
336 	u8 dscp;
337 
338 	switch (skb->protocol) {
339 	case htons(ETH_P_IP):
340 		dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
341 		break;
342 	case htons(ETH_P_IPV6):
343 		dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
344 		break;
345 	default:
346 		return q_num;
347 	}
348 
349 	switch (dscp) {
350 	case 0x08:
351 	case 0x20:
352 	case 0x40:
353 		q_num = AC_BK_Q;
354 		break;
355 	case 0x80:
356 	case 0xA0:
357 	case 0x28:
358 		q_num = AC_VI_Q;
359 		break;
360 	case 0xC0:
361 	case 0xD0:
362 	case 0xE0:
363 	case 0x88:
364 	case 0xB8:
365 		q_num = AC_VO_Q;
366 		break;
367 	}
368 
369 	return q_num;
370 }
371 
ac_balance(struct wilc * wl,u8 * ratio)372 static inline int ac_balance(struct wilc *wl, u8 *ratio)
373 {
374 	u8 i, max_count = 0;
375 
376 	if (!ratio)
377 		return -EINVAL;
378 
379 	for (i = 0; i < NQUEUES; i++)
380 		if (wl->txq[i].fw.count > max_count)
381 			max_count = wl->txq[i].fw.count;
382 
383 	for (i = 0; i < NQUEUES; i++)
384 		ratio[i] = max_count - wl->txq[i].fw.count;
385 
386 	return 0;
387 }
388 
ac_update_fw_ac_pkt_info(struct wilc * wl,u32 reg)389 static inline void ac_update_fw_ac_pkt_info(struct wilc *wl, u32 reg)
390 {
391 	wl->txq[AC_BK_Q].fw.count = FIELD_GET(BK_AC_COUNT_FIELD, reg);
392 	wl->txq[AC_BE_Q].fw.count = FIELD_GET(BE_AC_COUNT_FIELD, reg);
393 	wl->txq[AC_VI_Q].fw.count = FIELD_GET(VI_AC_COUNT_FIELD, reg);
394 	wl->txq[AC_VO_Q].fw.count = FIELD_GET(VO_AC_COUNT_FIELD, reg);
395 
396 	wl->txq[AC_BK_Q].fw.acm = FIELD_GET(BK_AC_ACM_STAT_FIELD, reg);
397 	wl->txq[AC_BE_Q].fw.acm = FIELD_GET(BE_AC_ACM_STAT_FIELD, reg);
398 	wl->txq[AC_VI_Q].fw.acm = FIELD_GET(VI_AC_ACM_STAT_FIELD, reg);
399 	wl->txq[AC_VO_Q].fw.acm = FIELD_GET(VO_AC_ACM_STAT_FIELD, reg);
400 }
401 
ac_change(struct wilc * wilc,u8 * ac)402 static inline u8 ac_change(struct wilc *wilc, u8 *ac)
403 {
404 	do {
405 		if (wilc->txq[*ac].fw.acm == 0)
406 			return 0;
407 		(*ac)++;
408 	} while (*ac < NQUEUES);
409 
410 	return 1;
411 }
412 
wilc_wlan_txq_add_net_pkt(struct net_device * dev,struct tx_complete_data * tx_data,u8 * buffer,u32 buffer_size,void (* tx_complete_fn)(void *,int))413 int wilc_wlan_txq_add_net_pkt(struct net_device *dev,
414 			      struct tx_complete_data *tx_data, u8 *buffer,
415 			      u32 buffer_size,
416 			      void (*tx_complete_fn)(void *, int))
417 {
418 	struct txq_entry_t *tqe;
419 	struct wilc_vif *vif = netdev_priv(dev);
420 	struct wilc *wilc;
421 	u8 q_num;
422 
423 	wilc = vif->wilc;
424 
425 	if (wilc->quit) {
426 		tx_complete_fn(tx_data, 0);
427 		return 0;
428 	}
429 
430 	if (!wilc->initialized) {
431 		tx_complete_fn(tx_data, 0);
432 		return 0;
433 	}
434 
435 	tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
436 
437 	if (!tqe) {
438 		tx_complete_fn(tx_data, 0);
439 		return 0;
440 	}
441 	tqe->type = WILC_NET_PKT;
442 	tqe->buffer = buffer;
443 	tqe->buffer_size = buffer_size;
444 	tqe->tx_complete_func = tx_complete_fn;
445 	tqe->priv = tx_data;
446 	tqe->vif = vif;
447 
448 	q_num = ac_classify(wilc, tx_data->skb);
449 	tqe->q_num = q_num;
450 	if (ac_change(wilc, &q_num)) {
451 		tx_complete_fn(tx_data, 0);
452 		kfree(tqe);
453 		return 0;
454 	}
455 
456 	if (is_ac_q_limit(wilc, q_num)) {
457 		tqe->ack_idx = NOT_TCP_ACK;
458 		if (vif->ack_filter.enabled)
459 			tcp_process(dev, tqe);
460 		wilc_wlan_txq_add_to_tail(dev, q_num, tqe);
461 	} else {
462 		tx_complete_fn(tx_data, 0);
463 		kfree(tqe);
464 	}
465 
466 	return wilc->txq_entries;
467 }
468 
wilc_wlan_txq_add_mgmt_pkt(struct net_device * dev,void * priv,u8 * buffer,u32 buffer_size,void (* tx_complete_fn)(void *,int))469 int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
470 			       u32 buffer_size,
471 			       void (*tx_complete_fn)(void *, int))
472 {
473 	struct txq_entry_t *tqe;
474 	struct wilc_vif *vif = netdev_priv(dev);
475 	struct wilc *wilc;
476 
477 	wilc = vif->wilc;
478 
479 	if (wilc->quit) {
480 		tx_complete_fn(priv, 0);
481 		return 0;
482 	}
483 
484 	if (!wilc->initialized) {
485 		tx_complete_fn(priv, 0);
486 		return 0;
487 	}
488 	tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
489 
490 	if (!tqe) {
491 		tx_complete_fn(priv, 0);
492 		return 0;
493 	}
494 	tqe->type = WILC_MGMT_PKT;
495 	tqe->buffer = buffer;
496 	tqe->buffer_size = buffer_size;
497 	tqe->tx_complete_func = tx_complete_fn;
498 	tqe->priv = priv;
499 	tqe->q_num = AC_BE_Q;
500 	tqe->ack_idx = NOT_TCP_ACK;
501 	tqe->vif = vif;
502 	wilc_wlan_txq_add_to_tail(dev, AC_VO_Q, tqe);
503 	return 1;
504 }
505 
wilc_wlan_txq_get_first(struct wilc * wilc,u8 q_num)506 static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc, u8 q_num)
507 {
508 	struct txq_entry_t *tqe = NULL;
509 	unsigned long flags;
510 
511 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
512 
513 	if (!list_empty(&wilc->txq[q_num].txq_head.list))
514 		tqe = list_first_entry(&wilc->txq[q_num].txq_head.list,
515 				       struct txq_entry_t, list);
516 
517 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
518 
519 	return tqe;
520 }
521 
wilc_wlan_txq_get_next(struct wilc * wilc,struct txq_entry_t * tqe,u8 q_num)522 static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
523 						  struct txq_entry_t *tqe,
524 						  u8 q_num)
525 {
526 	unsigned long flags;
527 
528 	spin_lock_irqsave(&wilc->txq_spinlock, flags);
529 
530 	if (!list_is_last(&tqe->list, &wilc->txq[q_num].txq_head.list))
531 		tqe = list_next_entry(tqe, list);
532 	else
533 		tqe = NULL;
534 	spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
535 
536 	return tqe;
537 }
538 
wilc_wlan_rxq_add(struct wilc * wilc,struct rxq_entry_t * rqe)539 static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
540 {
541 	if (wilc->quit)
542 		return;
543 
544 	mutex_lock(&wilc->rxq_cs);
545 	list_add_tail(&rqe->list, &wilc->rxq_head.list);
546 	mutex_unlock(&wilc->rxq_cs);
547 }
548 
wilc_wlan_rxq_remove(struct wilc * wilc)549 static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
550 {
551 	struct rxq_entry_t *rqe = NULL;
552 
553 	mutex_lock(&wilc->rxq_cs);
554 	if (!list_empty(&wilc->rxq_head.list)) {
555 		rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
556 				       list);
557 		list_del(&rqe->list);
558 	}
559 	mutex_unlock(&wilc->rxq_cs);
560 	return rqe;
561 }
562 
chip_allow_sleep(struct wilc * wilc)563 void chip_allow_sleep(struct wilc *wilc)
564 {
565 	u32 reg = 0;
566 	const struct wilc_hif_func *hif_func = wilc->hif_func;
567 	u32 wakeup_reg, wakeup_bit;
568 	u32 to_host_from_fw_reg, to_host_from_fw_bit;
569 	u32 from_host_to_fw_reg, from_host_to_fw_bit;
570 	u32 trials = 100;
571 	int ret;
572 
573 	if (wilc->io_type == WILC_HIF_SDIO) {
574 		wakeup_reg = WILC_SDIO_WAKEUP_REG;
575 		wakeup_bit = WILC_SDIO_WAKEUP_BIT;
576 		from_host_to_fw_reg = WILC_SDIO_HOST_TO_FW_REG;
577 		from_host_to_fw_bit = WILC_SDIO_HOST_TO_FW_BIT;
578 		to_host_from_fw_reg = WILC_SDIO_FW_TO_HOST_REG;
579 		to_host_from_fw_bit = WILC_SDIO_FW_TO_HOST_BIT;
580 	} else {
581 		wakeup_reg = WILC_SPI_WAKEUP_REG;
582 		wakeup_bit = WILC_SPI_WAKEUP_BIT;
583 		from_host_to_fw_reg = WILC_SPI_HOST_TO_FW_REG;
584 		from_host_to_fw_bit = WILC_SPI_HOST_TO_FW_BIT;
585 		to_host_from_fw_reg = WILC_SPI_FW_TO_HOST_REG;
586 		to_host_from_fw_bit = WILC_SPI_FW_TO_HOST_BIT;
587 	}
588 
589 	while (--trials) {
590 		ret = hif_func->hif_read_reg(wilc, to_host_from_fw_reg, &reg);
591 		if (ret)
592 			return;
593 		if ((reg & to_host_from_fw_bit) == 0)
594 			break;
595 	}
596 	if (!trials)
597 		pr_warn("FW not responding\n");
598 
599 	/* Clear bit 1 */
600 	ret = hif_func->hif_read_reg(wilc, wakeup_reg, &reg);
601 	if (ret)
602 		return;
603 	if (reg & wakeup_bit) {
604 		reg &= ~wakeup_bit;
605 		ret = hif_func->hif_write_reg(wilc, wakeup_reg, reg);
606 		if (ret)
607 			return;
608 	}
609 
610 	ret = hif_func->hif_read_reg(wilc, from_host_to_fw_reg, &reg);
611 	if (ret)
612 		return;
613 	if (reg & from_host_to_fw_bit) {
614 		reg &= ~from_host_to_fw_bit;
615 		ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg, reg);
616 		if (ret)
617 			return;
618 
619 	}
620 }
621 EXPORT_SYMBOL_GPL(chip_allow_sleep);
622 
chip_wakeup(struct wilc * wilc)623 void chip_wakeup(struct wilc *wilc)
624 {
625 	u32 ret = 0;
626 	u32 clk_status_val = 0, trials = 0;
627 	u32 wakeup_reg, wakeup_bit;
628 	u32 clk_status_reg, clk_status_bit;
629 	u32 from_host_to_fw_reg, from_host_to_fw_bit;
630 	const struct wilc_hif_func *hif_func = wilc->hif_func;
631 
632 	if (wilc->io_type == WILC_HIF_SDIO) {
633 		wakeup_reg = WILC_SDIO_WAKEUP_REG;
634 		wakeup_bit = WILC_SDIO_WAKEUP_BIT;
635 		clk_status_reg = WILC_SDIO_CLK_STATUS_REG;
636 		clk_status_bit = WILC_SDIO_CLK_STATUS_BIT;
637 		from_host_to_fw_reg = WILC_SDIO_HOST_TO_FW_REG;
638 		from_host_to_fw_bit = WILC_SDIO_HOST_TO_FW_BIT;
639 	} else {
640 		wakeup_reg = WILC_SPI_WAKEUP_REG;
641 		wakeup_bit = WILC_SPI_WAKEUP_BIT;
642 		clk_status_reg = WILC_SPI_CLK_STATUS_REG;
643 		clk_status_bit = WILC_SPI_CLK_STATUS_BIT;
644 		from_host_to_fw_reg = WILC_SPI_HOST_TO_FW_REG;
645 		from_host_to_fw_bit = WILC_SPI_HOST_TO_FW_BIT;
646 	}
647 
648 	/* indicate host wakeup */
649 	ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg,
650 				      from_host_to_fw_bit);
651 	if (ret)
652 		return;
653 
654 	/* Set wake-up bit */
655 	ret = hif_func->hif_write_reg(wilc, wakeup_reg,
656 				      wakeup_bit);
657 	if (ret)
658 		return;
659 
660 	while (trials < WAKE_UP_TRIAL_RETRY) {
661 		ret = hif_func->hif_read_reg(wilc, clk_status_reg,
662 					     &clk_status_val);
663 		if (ret) {
664 			pr_err("Bus error %d %x\n", ret, clk_status_val);
665 			return;
666 		}
667 		if (clk_status_val & clk_status_bit)
668 			break;
669 
670 		trials++;
671 	}
672 	if (trials >= WAKE_UP_TRIAL_RETRY) {
673 		pr_err("Failed to wake-up the chip\n");
674 		return;
675 	}
676 	/* Sometimes spi fail to read clock regs after reading
677 	 * writing clockless registers
678 	 */
679 	if (wilc->io_type == WILC_HIF_SPI)
680 		wilc->hif_func->hif_reset(wilc);
681 }
682 EXPORT_SYMBOL_GPL(chip_wakeup);
683 
host_wakeup_notify(struct wilc * wilc)684 void host_wakeup_notify(struct wilc *wilc)
685 {
686 	acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
687 	wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1);
688 	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
689 }
690 EXPORT_SYMBOL_GPL(host_wakeup_notify);
691 
host_sleep_notify(struct wilc * wilc)692 void host_sleep_notify(struct wilc *wilc)
693 {
694 	acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
695 	wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1);
696 	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
697 }
698 EXPORT_SYMBOL_GPL(host_sleep_notify);
699 
wilc_wlan_handle_txq(struct wilc * wilc,u32 * txq_count)700 int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
701 {
702 	int i, entries = 0;
703 	u8 k, ac;
704 	u32 sum;
705 	u32 reg;
706 	u8 ac_desired_ratio[NQUEUES] = {0, 0, 0, 0};
707 	u8 ac_preserve_ratio[NQUEUES] = {1, 1, 1, 1};
708 	u8 *num_pkts_to_add;
709 	u8 vmm_entries_ac[WILC_VMM_TBL_SIZE];
710 	u32 offset = 0;
711 	bool max_size_over = 0, ac_exist = 0;
712 	int vmm_sz = 0;
713 	struct txq_entry_t *tqe_q[NQUEUES];
714 	int ret = 0;
715 	int counter;
716 	int timeout;
717 	u32 *vmm_table = wilc->vmm_table;
718 	u8 ac_pkt_num_to_chip[NQUEUES] = {0, 0, 0, 0};
719 	const struct wilc_hif_func *func;
720 	int srcu_idx;
721 	u8 *txb = wilc->tx_buffer;
722 	struct wilc_vif *vif;
723 
724 	if (wilc->quit)
725 		goto out_update_cnt;
726 
727 	if (ac_balance(wilc, ac_desired_ratio))
728 		return -EINVAL;
729 
730 	mutex_lock(&wilc->txq_add_to_head_cs);
731 
732 	srcu_idx = srcu_read_lock(&wilc->srcu);
733 	list_for_each_entry_rcu(vif, &wilc->vif_list, list)
734 		wilc_wlan_txq_filter_dup_tcp_ack(vif->ndev);
735 	srcu_read_unlock(&wilc->srcu, srcu_idx);
736 
737 	for (ac = 0; ac < NQUEUES; ac++)
738 		tqe_q[ac] = wilc_wlan_txq_get_first(wilc, ac);
739 
740 	i = 0;
741 	sum = 0;
742 	max_size_over = 0;
743 	num_pkts_to_add = ac_desired_ratio;
744 	do {
745 		ac_exist = 0;
746 		for (ac = 0; (ac < NQUEUES) && (!max_size_over); ac++) {
747 			if (!tqe_q[ac])
748 				continue;
749 
750 			ac_exist = 1;
751 			for (k = 0; (k < num_pkts_to_add[ac]) &&
752 			     (!max_size_over) && tqe_q[ac]; k++) {
753 				if (i >= (WILC_VMM_TBL_SIZE - 1)) {
754 					max_size_over = 1;
755 					break;
756 				}
757 
758 				if (tqe_q[ac]->type == WILC_CFG_PKT)
759 					vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
760 				else if (tqe_q[ac]->type == WILC_NET_PKT)
761 					vmm_sz = ETH_ETHERNET_HDR_OFFSET;
762 				else
763 					vmm_sz = HOST_HDR_OFFSET;
764 
765 				vmm_sz += tqe_q[ac]->buffer_size;
766 				vmm_sz = ALIGN(vmm_sz, 4);
767 
768 				if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE) {
769 					max_size_over = 1;
770 					break;
771 				}
772 				vmm_table[i] = vmm_sz / 4;
773 				if (tqe_q[ac]->type == WILC_CFG_PKT)
774 					vmm_table[i] |= BIT(10);
775 
776 				cpu_to_le32s(&vmm_table[i]);
777 				vmm_entries_ac[i] = ac;
778 
779 				i++;
780 				sum += vmm_sz;
781 				tqe_q[ac] = wilc_wlan_txq_get_next(wilc,
782 								   tqe_q[ac],
783 								   ac);
784 			}
785 		}
786 		num_pkts_to_add = ac_preserve_ratio;
787 	} while (!max_size_over && ac_exist);
788 
789 	if (i == 0)
790 		goto out_unlock;
791 	vmm_table[i] = 0x0;
792 
793 	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
794 	counter = 0;
795 	func = wilc->hif_func;
796 	do {
797 		ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
798 		if (ret)
799 			break;
800 
801 		if ((reg & 0x1) == 0) {
802 			ac_update_fw_ac_pkt_info(wilc, reg);
803 			break;
804 		}
805 
806 		counter++;
807 		if (counter > 200) {
808 			counter = 0;
809 			ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
810 			break;
811 		}
812 	} while (!wilc->quit);
813 
814 	if (ret)
815 		goto out_release_bus;
816 
817 	timeout = 200;
818 	do {
819 		ret = func->hif_block_tx(wilc,
820 					 WILC_VMM_TBL_RX_SHADOW_BASE,
821 					 (u8 *)vmm_table,
822 					 ((i + 1) * 4));
823 		if (ret)
824 			break;
825 
826 		ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
827 		if (ret)
828 			break;
829 
830 		do {
831 			ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
832 			if (ret)
833 				break;
834 			if (FIELD_GET(WILC_VMM_ENTRY_AVAILABLE, reg)) {
835 				entries = FIELD_GET(WILC_VMM_ENTRY_COUNT, reg);
836 				break;
837 			}
838 		} while (--timeout);
839 		if (timeout <= 0) {
840 			ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
841 			break;
842 		}
843 
844 		if (ret)
845 			break;
846 
847 		if (entries == 0) {
848 			ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
849 			if (ret)
850 				break;
851 			reg &= ~BIT(0);
852 			ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
853 		}
854 	} while (0);
855 
856 	if (ret)
857 		goto out_release_bus;
858 
859 	if (entries == 0) {
860 		/*
861 		 * No VMM space available in firmware so retry to transmit
862 		 * the packet from tx queue.
863 		 */
864 		ret = WILC_VMM_ENTRY_FULL_RETRY;
865 		goto out_release_bus;
866 	}
867 
868 	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
869 
870 	offset = 0;
871 	i = 0;
872 	do {
873 		struct txq_entry_t *tqe;
874 		u32 header, buffer_offset;
875 		char *bssid;
876 		u8 mgmt_ptk = 0;
877 
878 		if (vmm_table[i] == 0 || vmm_entries_ac[i] >= NQUEUES)
879 			break;
880 
881 		tqe = wilc_wlan_txq_remove_from_head(wilc, vmm_entries_ac[i]);
882 		if (!tqe)
883 			break;
884 
885 		ac_pkt_num_to_chip[vmm_entries_ac[i]]++;
886 		vif = tqe->vif;
887 
888 		le32_to_cpus(&vmm_table[i]);
889 		vmm_sz = FIELD_GET(WILC_VMM_BUFFER_SIZE, vmm_table[i]);
890 		vmm_sz *= 4;
891 
892 		if (tqe->type == WILC_MGMT_PKT)
893 			mgmt_ptk = 1;
894 
895 		header = (FIELD_PREP(WILC_VMM_HDR_TYPE, tqe->type) |
896 			  FIELD_PREP(WILC_VMM_HDR_MGMT_FIELD, mgmt_ptk) |
897 			  FIELD_PREP(WILC_VMM_HDR_PKT_SIZE, tqe->buffer_size) |
898 			  FIELD_PREP(WILC_VMM_HDR_BUFF_SIZE, vmm_sz));
899 
900 		cpu_to_le32s(&header);
901 		memcpy(&txb[offset], &header, 4);
902 		if (tqe->type == WILC_CFG_PKT) {
903 			buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
904 		} else if (tqe->type == WILC_NET_PKT) {
905 			int prio = tqe->q_num;
906 
907 			bssid = tqe->vif->bssid;
908 			buffer_offset = ETH_ETHERNET_HDR_OFFSET;
909 			memcpy(&txb[offset + 4], &prio, sizeof(prio));
910 			memcpy(&txb[offset + 8], bssid, 6);
911 		} else {
912 			buffer_offset = HOST_HDR_OFFSET;
913 		}
914 
915 		memcpy(&txb[offset + buffer_offset],
916 		       tqe->buffer, tqe->buffer_size);
917 		offset += vmm_sz;
918 		i++;
919 		tqe->status = 1;
920 		if (tqe->tx_complete_func)
921 			tqe->tx_complete_func(tqe->priv, tqe->status);
922 		if (tqe->ack_idx != NOT_TCP_ACK &&
923 		    tqe->ack_idx < MAX_PENDING_ACKS)
924 			vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
925 		kfree(tqe);
926 	} while (--entries);
927 	for (i = 0; i < NQUEUES; i++)
928 		wilc->txq[i].fw.count += ac_pkt_num_to_chip[i];
929 
930 	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
931 
932 	ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
933 	if (ret)
934 		goto out_release_bus;
935 
936 	ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
937 
938 out_release_bus:
939 	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
940 
941 out_unlock:
942 	mutex_unlock(&wilc->txq_add_to_head_cs);
943 
944 out_update_cnt:
945 	*txq_count = wilc->txq_entries;
946 	return ret;
947 }
948 
wilc_wlan_handle_rx_buff(struct wilc * wilc,u8 * buffer,int size)949 static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
950 {
951 	int offset = 0;
952 	u32 header;
953 	u32 pkt_len, pkt_offset, tp_len;
954 	int is_cfg_packet;
955 	u8 *buff_ptr;
956 
957 	do {
958 		buff_ptr = buffer + offset;
959 		header = get_unaligned_le32(buff_ptr);
960 
961 		is_cfg_packet = FIELD_GET(WILC_PKT_HDR_CONFIG_FIELD, header);
962 		pkt_offset = FIELD_GET(WILC_PKT_HDR_OFFSET_FIELD, header);
963 		tp_len = FIELD_GET(WILC_PKT_HDR_TOTAL_LEN_FIELD, header);
964 		pkt_len = FIELD_GET(WILC_PKT_HDR_LEN_FIELD, header);
965 
966 		if (pkt_len == 0 || tp_len == 0)
967 			break;
968 
969 		if (pkt_offset & IS_MANAGMEMENT) {
970 			buff_ptr += HOST_HDR_OFFSET;
971 			wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len,
972 					 pkt_offset & IS_MGMT_AUTH_PKT);
973 		} else {
974 			if (!is_cfg_packet) {
975 				wilc_frmw_to_host(wilc, buff_ptr, pkt_len,
976 						  pkt_offset);
977 			} else {
978 				struct wilc_cfg_rsp rsp;
979 
980 				buff_ptr += pkt_offset;
981 
982 				wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
983 							  pkt_len,
984 							  &rsp);
985 				if (rsp.type == WILC_CFG_RSP) {
986 					if (wilc->cfg_seq_no == rsp.seq_no)
987 						complete(&wilc->cfg_event);
988 				} else if (rsp.type == WILC_CFG_RSP_STATUS) {
989 					wilc_mac_indicate(wilc);
990 				}
991 			}
992 		}
993 		offset += tp_len;
994 	} while (offset < size);
995 }
996 
wilc_wlan_handle_rxq(struct wilc * wilc)997 static void wilc_wlan_handle_rxq(struct wilc *wilc)
998 {
999 	int size;
1000 	u8 *buffer;
1001 	struct rxq_entry_t *rqe;
1002 
1003 	while (!wilc->quit) {
1004 		rqe = wilc_wlan_rxq_remove(wilc);
1005 		if (!rqe)
1006 			break;
1007 
1008 		buffer = rqe->buffer;
1009 		size = rqe->buffer_size;
1010 		wilc_wlan_handle_rx_buff(wilc, buffer, size);
1011 
1012 		kfree(rqe);
1013 	}
1014 	if (wilc->quit)
1015 		complete(&wilc->cfg_event);
1016 }
1017 
wilc_unknown_isr_ext(struct wilc * wilc)1018 static void wilc_unknown_isr_ext(struct wilc *wilc)
1019 {
1020 	wilc->hif_func->hif_clear_int_ext(wilc, 0);
1021 }
1022 
wilc_wlan_handle_isr_ext(struct wilc * wilc,u32 int_status)1023 static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
1024 {
1025 	u32 offset = wilc->rx_buffer_offset;
1026 	u8 *buffer = NULL;
1027 	u32 size;
1028 	u32 retries = 0;
1029 	int ret = 0;
1030 	struct rxq_entry_t *rqe;
1031 
1032 	size = FIELD_GET(WILC_INTERRUPT_DATA_SIZE, int_status) << 2;
1033 
1034 	while (!size && retries < 10) {
1035 		wilc->hif_func->hif_read_size(wilc, &size);
1036 		size = FIELD_GET(WILC_INTERRUPT_DATA_SIZE, size) << 2;
1037 		retries++;
1038 	}
1039 
1040 	if (size <= 0)
1041 		return;
1042 
1043 	if (WILC_RX_BUFF_SIZE - offset < size)
1044 		offset = 0;
1045 
1046 	buffer = &wilc->rx_buffer[offset];
1047 
1048 	wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
1049 	ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
1050 	if (ret)
1051 		return;
1052 
1053 	offset += size;
1054 	wilc->rx_buffer_offset = offset;
1055 	rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
1056 	if (!rqe)
1057 		return;
1058 
1059 	rqe->buffer = buffer;
1060 	rqe->buffer_size = size;
1061 	wilc_wlan_rxq_add(wilc, rqe);
1062 	wilc_wlan_handle_rxq(wilc);
1063 }
1064 
wilc_handle_isr(struct wilc * wilc)1065 void wilc_handle_isr(struct wilc *wilc)
1066 {
1067 	u32 int_status;
1068 
1069 	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
1070 	wilc->hif_func->hif_read_int(wilc, &int_status);
1071 
1072 	if (int_status & DATA_INT_EXT)
1073 		wilc_wlan_handle_isr_ext(wilc, int_status);
1074 
1075 	if (!(int_status & (ALL_INT_EXT)))
1076 		wilc_unknown_isr_ext(wilc);
1077 
1078 	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1079 }
1080 EXPORT_SYMBOL_GPL(wilc_handle_isr);
1081 
wilc_wlan_firmware_download(struct wilc * wilc,const u8 * buffer,u32 buffer_size)1082 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
1083 				u32 buffer_size)
1084 {
1085 	u32 offset;
1086 	u32 addr, size, size2, blksz;
1087 	u8 *dma_buffer;
1088 	int ret = 0;
1089 	u32 reg = 0;
1090 
1091 	blksz = BIT(12);
1092 
1093 	dma_buffer = kmalloc(blksz, GFP_KERNEL);
1094 	if (!dma_buffer)
1095 		return -EIO;
1096 
1097 	offset = 0;
1098 	pr_debug("%s: Downloading firmware size = %d\n", __func__, buffer_size);
1099 
1100 	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
1101 
1102 	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
1103 	reg &= ~BIT(10);
1104 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1105 	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
1106 	if (reg & BIT(10))
1107 		pr_err("%s: Failed to reset\n", __func__);
1108 
1109 	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1110 	do {
1111 		addr = get_unaligned_le32(&buffer[offset]);
1112 		size = get_unaligned_le32(&buffer[offset + 4]);
1113 		acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
1114 		offset += 8;
1115 		while (((int)size) && (offset < buffer_size)) {
1116 			if (size <= blksz)
1117 				size2 = size;
1118 			else
1119 				size2 = blksz;
1120 
1121 			memcpy(dma_buffer, &buffer[offset], size2);
1122 			ret = wilc->hif_func->hif_block_tx(wilc, addr,
1123 							   dma_buffer, size2);
1124 			if (ret)
1125 				break;
1126 
1127 			addr += size2;
1128 			offset += size2;
1129 			size -= size2;
1130 		}
1131 		release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1132 
1133 		if (ret) {
1134 			pr_err("%s Bus error\n", __func__);
1135 			goto fail;
1136 		}
1137 		pr_debug("%s Offset = %d\n", __func__, offset);
1138 	} while (offset < buffer_size);
1139 
1140 fail:
1141 
1142 	kfree(dma_buffer);
1143 
1144 	return ret;
1145 }
1146 
wilc_wlan_start(struct wilc * wilc)1147 int wilc_wlan_start(struct wilc *wilc)
1148 {
1149 	u32 reg = 0;
1150 	int ret;
1151 	u32 chipid;
1152 
1153 	if (wilc->io_type == WILC_HIF_SDIO) {
1154 		reg = 0;
1155 		reg |= BIT(3);
1156 	} else if (wilc->io_type == WILC_HIF_SPI) {
1157 		reg = 1;
1158 	}
1159 	acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1160 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
1161 	if (ret)
1162 		goto release;
1163 
1164 	reg = 0;
1165 	if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
1166 		reg |= WILC_HAVE_SDIO_IRQ_GPIO;
1167 
1168 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
1169 	if (ret)
1170 		goto release;
1171 
1172 	wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
1173 
1174 	ret = wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
1175 	if (ret)
1176 		goto release;
1177 
1178 	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
1179 	if ((reg & BIT(10)) == BIT(10)) {
1180 		reg &= ~BIT(10);
1181 		wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1182 		wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
1183 	}
1184 
1185 	reg |= BIT(10);
1186 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1187 	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
1188 
1189 release:
1190 	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1191 	return ret;
1192 }
1193 
wilc_wlan_stop(struct wilc * wilc,struct wilc_vif * vif)1194 int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
1195 {
1196 	u32 reg = 0;
1197 	int ret;
1198 
1199 	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
1200 
1201 	ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, &reg);
1202 	if (ret) {
1203 		netdev_err(vif->ndev, "Error while reading reg\n");
1204 		goto release;
1205 	}
1206 
1207 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
1208 					(reg | WILC_ABORT_REQ_BIT));
1209 	if (ret) {
1210 		netdev_err(vif->ndev, "Error while writing reg\n");
1211 		goto release;
1212 	}
1213 
1214 	ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, &reg);
1215 	if (ret) {
1216 		netdev_err(vif->ndev, "Error while reading reg\n");
1217 		goto release;
1218 	}
1219 	reg = BIT(0);
1220 
1221 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg);
1222 	if (ret) {
1223 		netdev_err(vif->ndev, "Error while writing reg\n");
1224 		goto release;
1225 	}
1226 
1227 	ret = 0;
1228 release:
1229 	/* host comm is disabled - we can't issue sleep command anymore: */
1230 	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1231 
1232 	return ret;
1233 }
1234 
wilc_wlan_cleanup(struct net_device * dev)1235 void wilc_wlan_cleanup(struct net_device *dev)
1236 {
1237 	struct txq_entry_t *tqe;
1238 	struct rxq_entry_t *rqe;
1239 	u8 ac;
1240 	struct wilc_vif *vif = netdev_priv(dev);
1241 	struct wilc *wilc = vif->wilc;
1242 
1243 	wilc->quit = 1;
1244 	for (ac = 0; ac < NQUEUES; ac++) {
1245 		while ((tqe = wilc_wlan_txq_remove_from_head(wilc, ac))) {
1246 			if (tqe->tx_complete_func)
1247 				tqe->tx_complete_func(tqe->priv, 0);
1248 			kfree(tqe);
1249 		}
1250 	}
1251 
1252 	while ((rqe = wilc_wlan_rxq_remove(wilc)))
1253 		kfree(rqe);
1254 
1255 	kfree(wilc->vmm_table);
1256 	wilc->vmm_table = NULL;
1257 	kfree(wilc->rx_buffer);
1258 	wilc->rx_buffer = NULL;
1259 	kfree(wilc->tx_buffer);
1260 	wilc->tx_buffer = NULL;
1261 	wilc->hif_func->hif_deinit(wilc);
1262 }
1263 
wilc_wlan_cfg_commit(struct wilc_vif * vif,int type,u32 drv_handler)1264 static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
1265 				u32 drv_handler)
1266 {
1267 	struct wilc *wilc = vif->wilc;
1268 	struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
1269 	int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
1270 
1271 	if (type == WILC_CFG_SET)
1272 		cfg->hdr.cmd_type = 'W';
1273 	else
1274 		cfg->hdr.cmd_type = 'Q';
1275 
1276 	cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
1277 	cfg->hdr.total_len = cpu_to_le16(t_len);
1278 	cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
1279 	wilc->cfg_seq_no = cfg->hdr.seq_no;
1280 
1281 	if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
1282 		return -1;
1283 
1284 	return 0;
1285 }
1286 
wilc_wlan_cfg_set(struct wilc_vif * vif,int start,u16 wid,u8 * buffer,u32 buffer_size,int commit,u32 drv_handler)1287 int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1288 		      u32 buffer_size, int commit, u32 drv_handler)
1289 {
1290 	u32 offset;
1291 	int ret_size;
1292 	struct wilc *wilc = vif->wilc;
1293 
1294 	mutex_lock(&wilc->cfg_cmd_lock);
1295 
1296 	if (start)
1297 		wilc->cfg_frame_offset = 0;
1298 
1299 	offset = wilc->cfg_frame_offset;
1300 	ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1301 					 wid, buffer, buffer_size);
1302 	offset += ret_size;
1303 	wilc->cfg_frame_offset = offset;
1304 
1305 	if (!commit) {
1306 		mutex_unlock(&wilc->cfg_cmd_lock);
1307 		return ret_size;
1308 	}
1309 
1310 	netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1311 
1312 	if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1313 		ret_size = 0;
1314 
1315 	if (!wait_for_completion_timeout(&wilc->cfg_event,
1316 					 WILC_CFG_PKTS_TIMEOUT)) {
1317 		netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1318 		ret_size = 0;
1319 	}
1320 
1321 	wilc->cfg_frame_offset = 0;
1322 	wilc->cfg_seq_no += 1;
1323 	mutex_unlock(&wilc->cfg_cmd_lock);
1324 
1325 	return ret_size;
1326 }
1327 
wilc_wlan_cfg_get(struct wilc_vif * vif,int start,u16 wid,int commit,u32 drv_handler)1328 int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1329 		      u32 drv_handler)
1330 {
1331 	u32 offset;
1332 	int ret_size;
1333 	struct wilc *wilc = vif->wilc;
1334 
1335 	mutex_lock(&wilc->cfg_cmd_lock);
1336 
1337 	if (start)
1338 		wilc->cfg_frame_offset = 0;
1339 
1340 	offset = wilc->cfg_frame_offset;
1341 	ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
1342 	offset += ret_size;
1343 	wilc->cfg_frame_offset = offset;
1344 
1345 	if (!commit) {
1346 		mutex_unlock(&wilc->cfg_cmd_lock);
1347 		return ret_size;
1348 	}
1349 
1350 	if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1351 		ret_size = 0;
1352 
1353 	if (!wait_for_completion_timeout(&wilc->cfg_event,
1354 					 WILC_CFG_PKTS_TIMEOUT)) {
1355 		netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1356 		ret_size = 0;
1357 	}
1358 	wilc->cfg_frame_offset = 0;
1359 	wilc->cfg_seq_no += 1;
1360 	mutex_unlock(&wilc->cfg_cmd_lock);
1361 
1362 	return ret_size;
1363 }
1364 
wilc_send_config_pkt(struct wilc_vif * vif,u8 mode,struct wid * wids,u32 count)1365 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1366 			 u32 count)
1367 {
1368 	int i;
1369 	int ret = 0;
1370 	u32 drv = wilc_get_vif_idx(vif);
1371 
1372 	if (mode == WILC_GET_CFG) {
1373 		for (i = 0; i < count; i++) {
1374 			if (!wilc_wlan_cfg_get(vif, !i,
1375 					       wids[i].id,
1376 					       (i == count - 1),
1377 					       drv)) {
1378 				ret = -ETIMEDOUT;
1379 				break;
1380 			}
1381 		}
1382 		for (i = 0; i < count; i++) {
1383 			wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1384 							     wids[i].id,
1385 							     wids[i].val,
1386 							     wids[i].size);
1387 		}
1388 	} else if (mode == WILC_SET_CFG) {
1389 		for (i = 0; i < count; i++) {
1390 			if (!wilc_wlan_cfg_set(vif, !i,
1391 					       wids[i].id,
1392 					       wids[i].val,
1393 					       wids[i].size,
1394 					       (i == count - 1),
1395 					       drv)) {
1396 				ret = -ETIMEDOUT;
1397 				break;
1398 			}
1399 		}
1400 	}
1401 
1402 	return ret;
1403 }
1404 
init_chip(struct net_device * dev)1405 static int init_chip(struct net_device *dev)
1406 {
1407 	u32 chipid;
1408 	u32 reg;
1409 	int ret = 0;
1410 	struct wilc_vif *vif = netdev_priv(dev);
1411 	struct wilc *wilc = vif->wilc;
1412 
1413 	acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1414 
1415 	chipid = wilc_get_chipid(wilc, true);
1416 
1417 	if ((chipid & 0xfff) != 0xa0) {
1418 		ret = wilc->hif_func->hif_read_reg(wilc,
1419 						   WILC_CORTUS_RESET_MUX_SEL,
1420 						   &reg);
1421 		if (ret) {
1422 			netdev_err(dev, "fail read reg 0x1118\n");
1423 			goto release;
1424 		}
1425 		reg |= BIT(0);
1426 		ret = wilc->hif_func->hif_write_reg(wilc,
1427 						    WILC_CORTUS_RESET_MUX_SEL,
1428 						    reg);
1429 		if (ret) {
1430 			netdev_err(dev, "fail write reg 0x1118\n");
1431 			goto release;
1432 		}
1433 		ret = wilc->hif_func->hif_write_reg(wilc,
1434 						    WILC_CORTUS_BOOT_REGISTER,
1435 						    WILC_CORTUS_BOOT_FROM_IRAM);
1436 		if (ret) {
1437 			netdev_err(dev, "fail write reg 0xc0000\n");
1438 			goto release;
1439 		}
1440 	}
1441 
1442 release:
1443 	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1444 
1445 	return ret;
1446 }
1447 
wilc_get_chipid(struct wilc * wilc,bool update)1448 u32 wilc_get_chipid(struct wilc *wilc, bool update)
1449 {
1450 	u32 chipid = 0;
1451 	u32 rfrevid = 0;
1452 
1453 	if (wilc->chipid == 0 || update) {
1454 		wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
1455 		wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
1456 					     &rfrevid);
1457 		if (!is_wilc1000(chipid)) {
1458 			wilc->chipid = 0;
1459 			return wilc->chipid;
1460 		}
1461 		if (chipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
1462 			if (rfrevid != 0x1)
1463 				chipid = WILC_1000_BASE_ID_2A_REV1;
1464 		} else if (chipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
1465 			if (rfrevid == 0x4)
1466 				chipid = WILC_1000_BASE_ID_2B_REV1;
1467 			else if (rfrevid != 0x3)
1468 				chipid = WILC_1000_BASE_ID_2B_REV2;
1469 		}
1470 
1471 		wilc->chipid = chipid;
1472 	}
1473 	return wilc->chipid;
1474 }
1475 
wilc_wlan_init(struct net_device * dev)1476 int wilc_wlan_init(struct net_device *dev)
1477 {
1478 	int ret = 0;
1479 	struct wilc_vif *vif = netdev_priv(dev);
1480 	struct wilc *wilc;
1481 
1482 	wilc = vif->wilc;
1483 
1484 	wilc->quit = 0;
1485 
1486 	if (!wilc->hif_func->hif_is_init(wilc)) {
1487 		acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1488 		ret = wilc->hif_func->hif_init(wilc, false);
1489 		release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1490 		if (ret)
1491 			goto fail;
1492 	}
1493 
1494 	if (!wilc->vmm_table)
1495 		wilc->vmm_table = kcalloc(WILC_VMM_TBL_SIZE, sizeof(u32), GFP_KERNEL);
1496 
1497 	if (!wilc->vmm_table) {
1498 		ret = -ENOBUFS;
1499 		goto fail;
1500 	}
1501 
1502 	if (!wilc->tx_buffer)
1503 		wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
1504 
1505 	if (!wilc->tx_buffer) {
1506 		ret = -ENOBUFS;
1507 		goto fail;
1508 	}
1509 
1510 	if (!wilc->rx_buffer)
1511 		wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
1512 
1513 	if (!wilc->rx_buffer) {
1514 		ret = -ENOBUFS;
1515 		goto fail;
1516 	}
1517 
1518 	if (init_chip(dev)) {
1519 		ret = -EIO;
1520 		goto fail;
1521 	}
1522 
1523 	return 0;
1524 
1525 fail:
1526 	kfree(wilc->vmm_table);
1527 	wilc->vmm_table = NULL;
1528 	kfree(wilc->rx_buffer);
1529 	wilc->rx_buffer = NULL;
1530 	kfree(wilc->tx_buffer);
1531 	wilc->tx_buffer = NULL;
1532 
1533 	return ret;
1534 }
1535