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 "wilc_wfi_cfgoperations.h"
10 #include "wilc_wlan_cfg.h"
11
is_wilc1000(u32 id)12 static inline bool is_wilc1000(u32 id)
13 {
14 return (id & 0xfffff000) == 0x100000;
15 }
16
acquire_bus(struct wilc * wilc,enum bus_acquire acquire)17 static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
18 {
19 mutex_lock(&wilc->hif_cs);
20 if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP)
21 chip_wakeup(wilc);
22 }
23
release_bus(struct wilc * wilc,enum bus_release release)24 static inline void release_bus(struct wilc *wilc, enum bus_release release)
25 {
26 if (release == WILC_BUS_RELEASE_ALLOW_SLEEP)
27 chip_allow_sleep(wilc);
28 mutex_unlock(&wilc->hif_cs);
29 }
30
wilc_wlan_txq_remove(struct wilc * wilc,struct txq_entry_t * tqe)31 static void wilc_wlan_txq_remove(struct wilc *wilc, struct txq_entry_t *tqe)
32 {
33 list_del(&tqe->list);
34 wilc->txq_entries -= 1;
35 }
36
37 static struct txq_entry_t *
wilc_wlan_txq_remove_from_head(struct net_device * dev)38 wilc_wlan_txq_remove_from_head(struct net_device *dev)
39 {
40 struct txq_entry_t *tqe = NULL;
41 unsigned long flags;
42 struct wilc_vif *vif = netdev_priv(dev);
43 struct wilc *wilc = vif->wilc;
44
45 spin_lock_irqsave(&wilc->txq_spinlock, flags);
46
47 if (!list_empty(&wilc->txq_head.list)) {
48 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
49 list);
50 list_del(&tqe->list);
51 wilc->txq_entries -= 1;
52 }
53 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
54 return tqe;
55 }
56
wilc_wlan_txq_add_to_tail(struct net_device * dev,struct txq_entry_t * tqe)57 static void wilc_wlan_txq_add_to_tail(struct net_device *dev,
58 struct txq_entry_t *tqe)
59 {
60 unsigned long flags;
61 struct wilc_vif *vif = netdev_priv(dev);
62 struct wilc *wilc = vif->wilc;
63
64 spin_lock_irqsave(&wilc->txq_spinlock, flags);
65
66 list_add_tail(&tqe->list, &wilc->txq_head.list);
67 wilc->txq_entries += 1;
68
69 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
70
71 complete(&wilc->txq_event);
72 }
73
wilc_wlan_txq_add_to_head(struct wilc_vif * vif,struct txq_entry_t * tqe)74 static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif,
75 struct txq_entry_t *tqe)
76 {
77 unsigned long flags;
78 struct wilc *wilc = vif->wilc;
79
80 mutex_lock(&wilc->txq_add_to_head_cs);
81
82 spin_lock_irqsave(&wilc->txq_spinlock, flags);
83
84 list_add(&tqe->list, &wilc->txq_head.list);
85 wilc->txq_entries += 1;
86
87 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
88 mutex_unlock(&wilc->txq_add_to_head_cs);
89 complete(&wilc->txq_event);
90 }
91
92 #define NOT_TCP_ACK (-1)
93
add_tcp_session(struct wilc_vif * vif,u32 src_prt,u32 dst_prt,u32 seq)94 static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
95 u32 dst_prt, u32 seq)
96 {
97 struct tcp_ack_filter *f = &vif->ack_filter;
98
99 if (f->tcp_session < 2 * MAX_TCP_SESSION) {
100 f->ack_session_info[f->tcp_session].seq_num = seq;
101 f->ack_session_info[f->tcp_session].bigger_ack_num = 0;
102 f->ack_session_info[f->tcp_session].src_port = src_prt;
103 f->ack_session_info[f->tcp_session].dst_port = dst_prt;
104 f->tcp_session++;
105 }
106 }
107
update_tcp_session(struct wilc_vif * vif,u32 index,u32 ack)108 static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
109 {
110 struct tcp_ack_filter *f = &vif->ack_filter;
111
112 if (index < 2 * MAX_TCP_SESSION &&
113 ack > f->ack_session_info[index].bigger_ack_num)
114 f->ack_session_info[index].bigger_ack_num = ack;
115 }
116
add_tcp_pending_ack(struct wilc_vif * vif,u32 ack,u32 session_index,struct txq_entry_t * txqe)117 static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
118 u32 session_index,
119 struct txq_entry_t *txqe)
120 {
121 struct tcp_ack_filter *f = &vif->ack_filter;
122 u32 i = f->pending_base + f->pending_acks_idx;
123
124 if (i < MAX_PENDING_ACKS) {
125 f->pending_acks[i].ack_num = ack;
126 f->pending_acks[i].txqe = txqe;
127 f->pending_acks[i].session_index = session_index;
128 txqe->ack_idx = i;
129 f->pending_acks_idx++;
130 }
131 }
132
tcp_process(struct net_device * dev,struct txq_entry_t * tqe)133 static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
134 {
135 void *buffer = tqe->buffer;
136 const struct ethhdr *eth_hdr_ptr = buffer;
137 int i;
138 unsigned long flags;
139 struct wilc_vif *vif = netdev_priv(dev);
140 struct wilc *wilc = vif->wilc;
141 struct tcp_ack_filter *f = &vif->ack_filter;
142 const struct iphdr *ip_hdr_ptr;
143 const struct tcphdr *tcp_hdr_ptr;
144 u32 ihl, total_length, data_offset;
145
146 spin_lock_irqsave(&wilc->txq_spinlock, flags);
147
148 if (eth_hdr_ptr->h_proto != htons(ETH_P_IP))
149 goto out;
150
151 ip_hdr_ptr = buffer + ETH_HLEN;
152
153 if (ip_hdr_ptr->protocol != IPPROTO_TCP)
154 goto out;
155
156 ihl = ip_hdr_ptr->ihl << 2;
157 tcp_hdr_ptr = buffer + ETH_HLEN + ihl;
158 total_length = ntohs(ip_hdr_ptr->tot_len);
159
160 data_offset = tcp_hdr_ptr->doff << 2;
161 if (total_length == (ihl + data_offset)) {
162 u32 seq_no, ack_no;
163
164 seq_no = ntohl(tcp_hdr_ptr->seq);
165 ack_no = ntohl(tcp_hdr_ptr->ack_seq);
166 for (i = 0; i < f->tcp_session; i++) {
167 u32 j = f->ack_session_info[i].seq_num;
168
169 if (i < 2 * MAX_TCP_SESSION &&
170 j == seq_no) {
171 update_tcp_session(vif, i, ack_no);
172 break;
173 }
174 }
175 if (i == f->tcp_session)
176 add_tcp_session(vif, 0, 0, seq_no);
177
178 add_tcp_pending_ack(vif, ack_no, i, tqe);
179 }
180
181 out:
182 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
183 }
184
wilc_wlan_txq_filter_dup_tcp_ack(struct net_device * dev)185 static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
186 {
187 struct wilc_vif *vif = netdev_priv(dev);
188 struct wilc *wilc = vif->wilc;
189 struct tcp_ack_filter *f = &vif->ack_filter;
190 u32 i = 0;
191 u32 dropped = 0;
192 unsigned long flags;
193
194 spin_lock_irqsave(&wilc->txq_spinlock, flags);
195 for (i = f->pending_base;
196 i < (f->pending_base + f->pending_acks_idx); i++) {
197 u32 index;
198 u32 bigger_ack_num;
199
200 if (i >= MAX_PENDING_ACKS)
201 break;
202
203 index = f->pending_acks[i].session_index;
204
205 if (index >= 2 * MAX_TCP_SESSION)
206 break;
207
208 bigger_ack_num = f->ack_session_info[index].bigger_ack_num;
209
210 if (f->pending_acks[i].ack_num < bigger_ack_num) {
211 struct txq_entry_t *tqe;
212
213 tqe = f->pending_acks[i].txqe;
214 if (tqe) {
215 wilc_wlan_txq_remove(wilc, tqe);
216 tqe->status = 1;
217 if (tqe->tx_complete_func)
218 tqe->tx_complete_func(tqe->priv,
219 tqe->status);
220 kfree(tqe);
221 dropped++;
222 }
223 }
224 }
225 f->pending_acks_idx = 0;
226 f->tcp_session = 0;
227
228 if (f->pending_base == 0)
229 f->pending_base = MAX_TCP_SESSION;
230 else
231 f->pending_base = 0;
232
233 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
234
235 while (dropped > 0) {
236 wait_for_completion_timeout(&wilc->txq_event,
237 msecs_to_jiffies(1));
238 dropped--;
239 }
240 }
241
wilc_enable_tcp_ack_filter(struct wilc_vif * vif,bool value)242 void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
243 {
244 vif->ack_filter.enabled = value;
245 }
246
wilc_wlan_txq_add_cfg_pkt(struct wilc_vif * vif,u8 * buffer,u32 buffer_size)247 static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, u8 *buffer,
248 u32 buffer_size)
249 {
250 struct txq_entry_t *tqe;
251 struct wilc *wilc = vif->wilc;
252
253 netdev_dbg(vif->ndev, "Adding config packet ...\n");
254 if (wilc->quit) {
255 netdev_dbg(vif->ndev, "Return due to clear function\n");
256 complete(&wilc->cfg_event);
257 return 0;
258 }
259
260 tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
261 if (!tqe)
262 return 0;
263
264 tqe->type = WILC_CFG_PKT;
265 tqe->buffer = buffer;
266 tqe->buffer_size = buffer_size;
267 tqe->tx_complete_func = NULL;
268 tqe->priv = NULL;
269 tqe->ack_idx = NOT_TCP_ACK;
270 tqe->vif = vif;
271
272 wilc_wlan_txq_add_to_head(vif, tqe);
273
274 return 1;
275 }
276
wilc_wlan_txq_add_net_pkt(struct net_device * dev,void * priv,u8 * buffer,u32 buffer_size,void (* tx_complete_fn)(void *,int))277 int wilc_wlan_txq_add_net_pkt(struct net_device *dev, void *priv, u8 *buffer,
278 u32 buffer_size,
279 void (*tx_complete_fn)(void *, int))
280 {
281 struct txq_entry_t *tqe;
282 struct wilc_vif *vif = netdev_priv(dev);
283 struct wilc *wilc;
284
285 wilc = vif->wilc;
286
287 if (wilc->quit)
288 return 0;
289
290 tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
291
292 if (!tqe)
293 return 0;
294 tqe->type = WILC_NET_PKT;
295 tqe->buffer = buffer;
296 tqe->buffer_size = buffer_size;
297 tqe->tx_complete_func = tx_complete_fn;
298 tqe->priv = priv;
299 tqe->vif = vif;
300
301 tqe->ack_idx = NOT_TCP_ACK;
302 if (vif->ack_filter.enabled)
303 tcp_process(dev, tqe);
304 wilc_wlan_txq_add_to_tail(dev, tqe);
305 return wilc->txq_entries;
306 }
307
wilc_wlan_txq_add_mgmt_pkt(struct net_device * dev,void * priv,u8 * buffer,u32 buffer_size,void (* tx_complete_fn)(void *,int))308 int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
309 u32 buffer_size,
310 void (*tx_complete_fn)(void *, int))
311 {
312 struct txq_entry_t *tqe;
313 struct wilc_vif *vif = netdev_priv(dev);
314 struct wilc *wilc;
315
316 wilc = vif->wilc;
317
318 if (wilc->quit)
319 return 0;
320
321 tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
322
323 if (!tqe)
324 return 0;
325 tqe->type = WILC_MGMT_PKT;
326 tqe->buffer = buffer;
327 tqe->buffer_size = buffer_size;
328 tqe->tx_complete_func = tx_complete_fn;
329 tqe->priv = priv;
330 tqe->ack_idx = NOT_TCP_ACK;
331 tqe->vif = vif;
332 wilc_wlan_txq_add_to_tail(dev, tqe);
333 return 1;
334 }
335
wilc_wlan_txq_get_first(struct wilc * wilc)336 static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc)
337 {
338 struct txq_entry_t *tqe = NULL;
339 unsigned long flags;
340
341 spin_lock_irqsave(&wilc->txq_spinlock, flags);
342
343 if (!list_empty(&wilc->txq_head.list))
344 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
345 list);
346
347 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
348
349 return tqe;
350 }
351
wilc_wlan_txq_get_next(struct wilc * wilc,struct txq_entry_t * tqe)352 static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
353 struct txq_entry_t *tqe)
354 {
355 unsigned long flags;
356
357 spin_lock_irqsave(&wilc->txq_spinlock, flags);
358
359 if (!list_is_last(&tqe->list, &wilc->txq_head.list))
360 tqe = list_next_entry(tqe, list);
361 else
362 tqe = NULL;
363 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
364
365 return tqe;
366 }
367
wilc_wlan_rxq_add(struct wilc * wilc,struct rxq_entry_t * rqe)368 static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
369 {
370 if (wilc->quit)
371 return;
372
373 mutex_lock(&wilc->rxq_cs);
374 list_add_tail(&rqe->list, &wilc->rxq_head.list);
375 mutex_unlock(&wilc->rxq_cs);
376 }
377
wilc_wlan_rxq_remove(struct wilc * wilc)378 static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
379 {
380 struct rxq_entry_t *rqe = NULL;
381
382 mutex_lock(&wilc->rxq_cs);
383 if (!list_empty(&wilc->rxq_head.list)) {
384 rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
385 list);
386 list_del(&rqe->list);
387 }
388 mutex_unlock(&wilc->rxq_cs);
389 return rqe;
390 }
391
chip_allow_sleep(struct wilc * wilc)392 void chip_allow_sleep(struct wilc *wilc)
393 {
394 u32 reg = 0;
395
396 wilc->hif_func->hif_read_reg(wilc, 0xf0, ®);
397
398 wilc->hif_func->hif_write_reg(wilc, 0xf0, reg & ~BIT(0));
399 wilc->hif_func->hif_write_reg(wilc, 0xfa, 0);
400 }
401 EXPORT_SYMBOL_GPL(chip_allow_sleep);
402
chip_wakeup(struct wilc * wilc)403 void chip_wakeup(struct wilc *wilc)
404 {
405 u32 reg, clk_status_reg;
406
407 if ((wilc->io_type & 0x1) == WILC_HIF_SPI) {
408 do {
409 wilc->hif_func->hif_read_reg(wilc, 1, ®);
410 wilc->hif_func->hif_write_reg(wilc, 1, reg | BIT(1));
411 wilc->hif_func->hif_write_reg(wilc, 1, reg & ~BIT(1));
412
413 do {
414 usleep_range(2000, 2500);
415 wilc_get_chipid(wilc, true);
416 } while (wilc_get_chipid(wilc, true) == 0);
417 } while (wilc_get_chipid(wilc, true) == 0);
418 } else if ((wilc->io_type & 0x1) == WILC_HIF_SDIO) {
419 wilc->hif_func->hif_write_reg(wilc, 0xfa, 1);
420 usleep_range(200, 400);
421 wilc->hif_func->hif_read_reg(wilc, 0xf0, ®);
422 do {
423 wilc->hif_func->hif_write_reg(wilc, 0xf0,
424 reg | BIT(0));
425 wilc->hif_func->hif_read_reg(wilc, 0xf1,
426 &clk_status_reg);
427
428 while ((clk_status_reg & 0x1) == 0) {
429 usleep_range(2000, 2500);
430
431 wilc->hif_func->hif_read_reg(wilc, 0xf1,
432 &clk_status_reg);
433 }
434 if ((clk_status_reg & 0x1) == 0) {
435 wilc->hif_func->hif_write_reg(wilc, 0xf0,
436 reg & (~BIT(0)));
437 }
438 } while ((clk_status_reg & 0x1) == 0);
439 }
440
441 if (wilc->chip_ps_state == WILC_CHIP_SLEEPING_MANUAL) {
442 if (wilc_get_chipid(wilc, false) < 0x1002b0) {
443 u32 val32;
444
445 wilc->hif_func->hif_read_reg(wilc, 0x1e1c, &val32);
446 val32 |= BIT(6);
447 wilc->hif_func->hif_write_reg(wilc, 0x1e1c, val32);
448
449 wilc->hif_func->hif_read_reg(wilc, 0x1e9c, &val32);
450 val32 |= BIT(6);
451 wilc->hif_func->hif_write_reg(wilc, 0x1e9c, val32);
452 }
453 }
454 wilc->chip_ps_state = WILC_CHIP_WAKEDUP;
455 }
456 EXPORT_SYMBOL_GPL(chip_wakeup);
457
host_wakeup_notify(struct wilc * wilc)458 void host_wakeup_notify(struct wilc *wilc)
459 {
460 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
461 wilc->hif_func->hif_write_reg(wilc, 0x10b0, 1);
462 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
463 }
464 EXPORT_SYMBOL_GPL(host_wakeup_notify);
465
host_sleep_notify(struct wilc * wilc)466 void host_sleep_notify(struct wilc *wilc)
467 {
468 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
469 wilc->hif_func->hif_write_reg(wilc, 0x10ac, 1);
470 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
471 }
472 EXPORT_SYMBOL_GPL(host_sleep_notify);
473
wilc_wlan_handle_txq(struct wilc * wilc,u32 * txq_count)474 int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
475 {
476 int i, entries = 0;
477 u32 sum;
478 u32 reg;
479 u32 offset = 0;
480 int vmm_sz = 0;
481 struct txq_entry_t *tqe;
482 int ret = 0;
483 int counter;
484 int timeout;
485 u32 vmm_table[WILC_VMM_TBL_SIZE];
486 const struct wilc_hif_func *func;
487 u8 *txb = wilc->tx_buffer;
488 struct net_device *dev;
489 struct wilc_vif *vif;
490
491 if (wilc->quit)
492 goto out;
493
494 mutex_lock(&wilc->txq_add_to_head_cs);
495 tqe = wilc_wlan_txq_get_first(wilc);
496 if (!tqe)
497 goto out;
498 dev = tqe->vif->ndev;
499 wilc_wlan_txq_filter_dup_tcp_ack(dev);
500 i = 0;
501 sum = 0;
502 do {
503 if (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
504 if (tqe->type == WILC_CFG_PKT)
505 vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
506
507 else if (tqe->type == WILC_NET_PKT)
508 vmm_sz = ETH_ETHERNET_HDR_OFFSET;
509
510 else
511 vmm_sz = HOST_HDR_OFFSET;
512
513 vmm_sz += tqe->buffer_size;
514
515 if (vmm_sz & 0x3)
516 vmm_sz = (vmm_sz + 4) & ~0x3;
517
518 if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE)
519 break;
520
521 vmm_table[i] = vmm_sz / 4;
522 if (tqe->type == WILC_CFG_PKT)
523 vmm_table[i] |= BIT(10);
524 cpu_to_le32s(&vmm_table[i]);
525
526 i++;
527 sum += vmm_sz;
528 tqe = wilc_wlan_txq_get_next(wilc, tqe);
529 } else {
530 break;
531 }
532 } while (1);
533
534 if (i == 0)
535 goto out;
536 vmm_table[i] = 0x0;
537
538 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
539 counter = 0;
540 func = wilc->hif_func;
541 do {
542 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
543 if (!ret)
544 break;
545
546 if ((reg & 0x1) == 0)
547 break;
548
549 counter++;
550 if (counter > 200) {
551 counter = 0;
552 ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
553 break;
554 }
555 } while (!wilc->quit);
556
557 if (!ret)
558 goto out_release_bus;
559
560 timeout = 200;
561 do {
562 ret = func->hif_block_tx(wilc,
563 WILC_VMM_TBL_RX_SHADOW_BASE,
564 (u8 *)vmm_table,
565 ((i + 1) * 4));
566 if (!ret)
567 break;
568
569 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
570 if (!ret)
571 break;
572
573 do {
574 ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, ®);
575 if (!ret)
576 break;
577 if ((reg >> 2) & 0x1) {
578 entries = ((reg >> 3) & 0x3f);
579 break;
580 }
581 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
582 } while (--timeout);
583 if (timeout <= 0) {
584 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
585 break;
586 }
587
588 if (!ret)
589 break;
590
591 if (entries == 0) {
592 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
593 if (!ret)
594 break;
595 reg &= ~BIT(0);
596 ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
597 if (!ret)
598 break;
599 break;
600 }
601 break;
602 } while (1);
603
604 if (!ret)
605 goto out_release_bus;
606
607 if (entries == 0) {
608 ret = -ENOBUFS;
609 goto out_release_bus;
610 }
611
612 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
613
614 offset = 0;
615 i = 0;
616 do {
617 u32 header, buffer_offset;
618 char *bssid;
619
620 tqe = wilc_wlan_txq_remove_from_head(dev);
621 if (!tqe)
622 break;
623
624 vif = tqe->vif;
625 if (vmm_table[i] == 0)
626 break;
627
628 le32_to_cpus(&vmm_table[i]);
629 vmm_sz = (vmm_table[i] & 0x3ff);
630 vmm_sz *= 4;
631 header = (tqe->type << 31) |
632 (tqe->buffer_size << 15) |
633 vmm_sz;
634 if (tqe->type == WILC_MGMT_PKT)
635 header |= BIT(30);
636 else
637 header &= ~BIT(30);
638
639 cpu_to_le32s(&header);
640 memcpy(&txb[offset], &header, 4);
641 if (tqe->type == WILC_CFG_PKT) {
642 buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
643 } else if (tqe->type == WILC_NET_PKT) {
644 bssid = tqe->vif->bssid;
645 buffer_offset = ETH_ETHERNET_HDR_OFFSET;
646 memcpy(&txb[offset + 8], bssid, 6);
647 } else {
648 buffer_offset = HOST_HDR_OFFSET;
649 }
650
651 memcpy(&txb[offset + buffer_offset],
652 tqe->buffer, tqe->buffer_size);
653 offset += vmm_sz;
654 i++;
655 tqe->status = 1;
656 if (tqe->tx_complete_func)
657 tqe->tx_complete_func(tqe->priv, tqe->status);
658 if (tqe->ack_idx != NOT_TCP_ACK &&
659 tqe->ack_idx < MAX_PENDING_ACKS)
660 vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
661 kfree(tqe);
662 } while (--entries);
663
664 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
665
666 ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
667 if (!ret)
668 goto out_release_bus;
669
670 ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
671
672 out_release_bus:
673 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
674
675 out:
676 mutex_unlock(&wilc->txq_add_to_head_cs);
677
678 *txq_count = wilc->txq_entries;
679 return ret;
680 }
681
wilc_wlan_handle_rx_buff(struct wilc * wilc,u8 * buffer,int size)682 static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
683 {
684 int offset = 0;
685 u32 header;
686 u32 pkt_len, pkt_offset, tp_len;
687 int is_cfg_packet;
688 u8 *buff_ptr;
689
690 do {
691 buff_ptr = buffer + offset;
692 header = get_unaligned_le32(buff_ptr);
693
694 is_cfg_packet = (header >> 31) & 0x1;
695 pkt_offset = (header >> 22) & 0x1ff;
696 tp_len = (header >> 11) & 0x7ff;
697 pkt_len = header & 0x7ff;
698
699 if (pkt_len == 0 || tp_len == 0)
700 break;
701
702 if (pkt_offset & IS_MANAGMEMENT) {
703 buff_ptr += HOST_HDR_OFFSET;
704 wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
705 } else {
706 if (!is_cfg_packet) {
707 if (pkt_len > 0) {
708 wilc_frmw_to_host(wilc, buff_ptr,
709 pkt_len, pkt_offset);
710 }
711 } else {
712 struct wilc_cfg_rsp rsp;
713
714 buff_ptr += pkt_offset;
715
716 wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
717 pkt_len,
718 &rsp);
719 if (rsp.type == WILC_CFG_RSP) {
720 if (wilc->cfg_seq_no == rsp.seq_no)
721 complete(&wilc->cfg_event);
722 } else if (rsp.type == WILC_CFG_RSP_STATUS) {
723 wilc_mac_indicate(wilc);
724 }
725 }
726 }
727 offset += tp_len;
728 if (offset >= size)
729 break;
730 } while (1);
731 }
732
wilc_wlan_handle_rxq(struct wilc * wilc)733 static void wilc_wlan_handle_rxq(struct wilc *wilc)
734 {
735 int size;
736 u8 *buffer;
737 struct rxq_entry_t *rqe;
738
739 do {
740 if (wilc->quit) {
741 complete(&wilc->cfg_event);
742 break;
743 }
744 rqe = wilc_wlan_rxq_remove(wilc);
745 if (!rqe)
746 break;
747
748 buffer = rqe->buffer;
749 size = rqe->buffer_size;
750 wilc_wlan_handle_rx_buff(wilc, buffer, size);
751
752 kfree(rqe);
753 } while (1);
754 }
755
wilc_unknown_isr_ext(struct wilc * wilc)756 static void wilc_unknown_isr_ext(struct wilc *wilc)
757 {
758 wilc->hif_func->hif_clear_int_ext(wilc, 0);
759 }
760
wilc_wlan_handle_isr_ext(struct wilc * wilc,u32 int_status)761 static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
762 {
763 u32 offset = wilc->rx_buffer_offset;
764 u8 *buffer = NULL;
765 u32 size;
766 u32 retries = 0;
767 int ret = 0;
768 struct rxq_entry_t *rqe;
769
770 size = (int_status & 0x7fff) << 2;
771
772 while (!size && retries < 10) {
773 wilc->hif_func->hif_read_size(wilc, &size);
774 size = (size & 0x7fff) << 2;
775 retries++;
776 }
777
778 if (size <= 0)
779 return;
780
781 if (WILC_RX_BUFF_SIZE - offset < size)
782 offset = 0;
783
784 buffer = &wilc->rx_buffer[offset];
785
786 wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
787 ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
788 if (!ret)
789 return;
790
791 offset += size;
792 wilc->rx_buffer_offset = offset;
793 rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
794 if (!rqe)
795 return;
796
797 rqe->buffer = buffer;
798 rqe->buffer_size = size;
799 wilc_wlan_rxq_add(wilc, rqe);
800 wilc_wlan_handle_rxq(wilc);
801 }
802
wilc_handle_isr(struct wilc * wilc)803 void wilc_handle_isr(struct wilc *wilc)
804 {
805 u32 int_status;
806
807 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
808 wilc->hif_func->hif_read_int(wilc, &int_status);
809
810 if (int_status & DATA_INT_EXT)
811 wilc_wlan_handle_isr_ext(wilc, int_status);
812
813 if (!(int_status & (ALL_INT_EXT)))
814 wilc_unknown_isr_ext(wilc);
815
816 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
817 }
818 EXPORT_SYMBOL_GPL(wilc_handle_isr);
819
wilc_wlan_firmware_download(struct wilc * wilc,const u8 * buffer,u32 buffer_size)820 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
821 u32 buffer_size)
822 {
823 u32 offset;
824 u32 addr, size, size2, blksz;
825 u8 *dma_buffer;
826 int ret = 0;
827
828 blksz = BIT(12);
829
830 dma_buffer = kmalloc(blksz, GFP_KERNEL);
831 if (!dma_buffer)
832 return -EIO;
833
834 offset = 0;
835 do {
836 addr = get_unaligned_le32(&buffer[offset]);
837 size = get_unaligned_le32(&buffer[offset + 4]);
838 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
839 offset += 8;
840 while (((int)size) && (offset < buffer_size)) {
841 if (size <= blksz)
842 size2 = size;
843 else
844 size2 = blksz;
845
846 memcpy(dma_buffer, &buffer[offset], size2);
847 ret = wilc->hif_func->hif_block_tx(wilc, addr,
848 dma_buffer, size2);
849 if (!ret)
850 break;
851
852 addr += size2;
853 offset += size2;
854 size -= size2;
855 }
856 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
857
858 if (!ret) {
859 ret = -EIO;
860 goto fail;
861 }
862 } while (offset < buffer_size);
863
864 fail:
865
866 kfree(dma_buffer);
867
868 return (ret < 0) ? ret : 0;
869 }
870
wilc_wlan_start(struct wilc * wilc)871 int wilc_wlan_start(struct wilc *wilc)
872 {
873 u32 reg = 0;
874 int ret;
875 u32 chipid;
876
877 if (wilc->io_type == WILC_HIF_SDIO) {
878 reg = 0;
879 reg |= BIT(3);
880 } else if (wilc->io_type == WILC_HIF_SPI) {
881 reg = 1;
882 }
883 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
884 ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
885 if (!ret) {
886 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
887 return -EIO;
888 }
889 reg = 0;
890 if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
891 reg |= WILC_HAVE_SDIO_IRQ_GPIO;
892
893 #ifdef WILC_DISABLE_PMU
894 #else
895 reg |= WILC_HAVE_USE_PMU;
896 #endif
897
898 #ifdef WILC_SLEEP_CLK_SRC_XO
899 reg |= WILC_HAVE_SLEEP_CLK_SRC_XO;
900 #elif defined WILC_SLEEP_CLK_SRC_RTC
901 reg |= WILC_HAVE_SLEEP_CLK_SRC_RTC;
902 #endif
903
904 #ifdef WILC_EXT_PA_INV_TX_RX
905 reg |= WILC_HAVE_EXT_PA_INV_TX_RX;
906 #endif
907 reg |= WILC_HAVE_USE_IRQ_AS_HOST_WAKE;
908 reg |= WILC_HAVE_LEGACY_RF_SETTINGS;
909 #ifdef XTAL_24
910 reg |= WILC_HAVE_XTAL_24;
911 #endif
912 #ifdef DISABLE_WILC_UART
913 reg |= WILC_HAVE_DISABLE_WILC_UART;
914 #endif
915
916 ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
917 if (!ret) {
918 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
919 return -EIO;
920 }
921
922 wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
923
924 ret = wilc->hif_func->hif_read_reg(wilc, 0x1000, &chipid);
925 if (!ret) {
926 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
927 return -EIO;
928 }
929
930 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
931 if ((reg & BIT(10)) == BIT(10)) {
932 reg &= ~BIT(10);
933 wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
934 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
935 }
936
937 reg |= BIT(10);
938 ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
939 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
940 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
941
942 return (ret < 0) ? ret : 0;
943 }
944
wilc_wlan_stop(struct wilc * wilc,struct wilc_vif * vif)945 int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
946 {
947 u32 reg = 0;
948 int ret;
949
950 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
951
952 ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, ®);
953 if (!ret) {
954 netdev_err(vif->ndev, "Error while reading reg\n");
955 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
956 return -EIO;
957 }
958
959 ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
960 (reg | WILC_ABORT_REQ_BIT));
961 if (!ret) {
962 netdev_err(vif->ndev, "Error while writing reg\n");
963 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
964 return -EIO;
965 }
966
967 ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, ®);
968 if (!ret) {
969 netdev_err(vif->ndev, "Error while reading reg\n");
970 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
971 return -EIO;
972 }
973 reg = BIT(0);
974
975 ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg);
976 if (!ret) {
977 netdev_err(vif->ndev, "Error while writing reg\n");
978 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
979 return -EIO;
980 }
981
982 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
983
984 return 0;
985 }
986
wilc_wlan_cleanup(struct net_device * dev)987 void wilc_wlan_cleanup(struct net_device *dev)
988 {
989 struct txq_entry_t *tqe;
990 struct rxq_entry_t *rqe;
991 struct wilc_vif *vif = netdev_priv(dev);
992 struct wilc *wilc = vif->wilc;
993
994 wilc->quit = 1;
995 do {
996 tqe = wilc_wlan_txq_remove_from_head(dev);
997 if (!tqe)
998 break;
999 if (tqe->tx_complete_func)
1000 tqe->tx_complete_func(tqe->priv, 0);
1001 kfree(tqe);
1002 } while (1);
1003
1004 do {
1005 rqe = wilc_wlan_rxq_remove(wilc);
1006 if (!rqe)
1007 break;
1008 kfree(rqe);
1009 } while (1);
1010
1011 kfree(wilc->rx_buffer);
1012 wilc->rx_buffer = NULL;
1013 kfree(wilc->tx_buffer);
1014 wilc->tx_buffer = NULL;
1015 wilc->hif_func->hif_deinit(NULL);
1016 }
1017
wilc_wlan_cfg_commit(struct wilc_vif * vif,int type,u32 drv_handler)1018 static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
1019 u32 drv_handler)
1020 {
1021 struct wilc *wilc = vif->wilc;
1022 struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
1023 int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
1024
1025 if (type == WILC_CFG_SET)
1026 cfg->hdr.cmd_type = 'W';
1027 else
1028 cfg->hdr.cmd_type = 'Q';
1029
1030 cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
1031 cfg->hdr.total_len = cpu_to_le16(t_len);
1032 cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
1033 wilc->cfg_seq_no = cfg->hdr.seq_no;
1034
1035 if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
1036 return -1;
1037
1038 return 0;
1039 }
1040
wilc_wlan_cfg_set(struct wilc_vif * vif,int start,u16 wid,u8 * buffer,u32 buffer_size,int commit,u32 drv_handler)1041 int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1042 u32 buffer_size, int commit, u32 drv_handler)
1043 {
1044 u32 offset;
1045 int ret_size;
1046 struct wilc *wilc = vif->wilc;
1047
1048 mutex_lock(&wilc->cfg_cmd_lock);
1049
1050 if (start)
1051 wilc->cfg_frame_offset = 0;
1052
1053 offset = wilc->cfg_frame_offset;
1054 ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1055 wid, buffer, buffer_size);
1056 offset += ret_size;
1057 wilc->cfg_frame_offset = offset;
1058
1059 if (!commit) {
1060 mutex_unlock(&wilc->cfg_cmd_lock);
1061 return ret_size;
1062 }
1063
1064 netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1065
1066 if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1067 ret_size = 0;
1068
1069 if (!wait_for_completion_timeout(&wilc->cfg_event,
1070 WILC_CFG_PKTS_TIMEOUT)) {
1071 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1072 ret_size = 0;
1073 }
1074
1075 wilc->cfg_frame_offset = 0;
1076 wilc->cfg_seq_no += 1;
1077 mutex_unlock(&wilc->cfg_cmd_lock);
1078
1079 return ret_size;
1080 }
1081
wilc_wlan_cfg_get(struct wilc_vif * vif,int start,u16 wid,int commit,u32 drv_handler)1082 int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1083 u32 drv_handler)
1084 {
1085 u32 offset;
1086 int ret_size;
1087 struct wilc *wilc = vif->wilc;
1088
1089 mutex_lock(&wilc->cfg_cmd_lock);
1090
1091 if (start)
1092 wilc->cfg_frame_offset = 0;
1093
1094 offset = wilc->cfg_frame_offset;
1095 ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
1096 offset += ret_size;
1097 wilc->cfg_frame_offset = offset;
1098
1099 if (!commit) {
1100 mutex_unlock(&wilc->cfg_cmd_lock);
1101 return ret_size;
1102 }
1103
1104 if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1105 ret_size = 0;
1106
1107 if (!wait_for_completion_timeout(&wilc->cfg_event,
1108 WILC_CFG_PKTS_TIMEOUT)) {
1109 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1110 ret_size = 0;
1111 }
1112 wilc->cfg_frame_offset = 0;
1113 wilc->cfg_seq_no += 1;
1114 mutex_unlock(&wilc->cfg_cmd_lock);
1115
1116 return ret_size;
1117 }
1118
wilc_send_config_pkt(struct wilc_vif * vif,u8 mode,struct wid * wids,u32 count)1119 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1120 u32 count)
1121 {
1122 int i;
1123 int ret = 0;
1124 u32 drv = wilc_get_vif_idx(vif);
1125
1126 if (mode == WILC_GET_CFG) {
1127 for (i = 0; i < count; i++) {
1128 if (!wilc_wlan_cfg_get(vif, !i,
1129 wids[i].id,
1130 (i == count - 1),
1131 drv)) {
1132 ret = -ETIMEDOUT;
1133 break;
1134 }
1135 }
1136 for (i = 0; i < count; i++) {
1137 wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1138 wids[i].id,
1139 wids[i].val,
1140 wids[i].size);
1141 }
1142 } else if (mode == WILC_SET_CFG) {
1143 for (i = 0; i < count; i++) {
1144 if (!wilc_wlan_cfg_set(vif, !i,
1145 wids[i].id,
1146 wids[i].val,
1147 wids[i].size,
1148 (i == count - 1),
1149 drv)) {
1150 ret = -ETIMEDOUT;
1151 break;
1152 }
1153 }
1154 }
1155
1156 return ret;
1157 }
1158
init_chip(struct net_device * dev)1159 static u32 init_chip(struct net_device *dev)
1160 {
1161 u32 chipid;
1162 u32 reg, ret = 0;
1163 struct wilc_vif *vif = netdev_priv(dev);
1164 struct wilc *wilc = vif->wilc;
1165
1166 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1167
1168 chipid = wilc_get_chipid(wilc, true);
1169
1170 if ((chipid & 0xfff) != 0xa0) {
1171 ret = wilc->hif_func->hif_read_reg(wilc, 0x1118, ®);
1172 if (!ret) {
1173 netdev_err(dev, "fail read reg 0x1118\n");
1174 goto release;
1175 }
1176 reg |= BIT(0);
1177 ret = wilc->hif_func->hif_write_reg(wilc, 0x1118, reg);
1178 if (!ret) {
1179 netdev_err(dev, "fail write reg 0x1118\n");
1180 goto release;
1181 }
1182 ret = wilc->hif_func->hif_write_reg(wilc, 0xc0000, 0x71);
1183 if (!ret) {
1184 netdev_err(dev, "fail write reg 0xc0000\n");
1185 goto release;
1186 }
1187 }
1188
1189 release:
1190 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1191
1192 return ret;
1193 }
1194
wilc_get_chipid(struct wilc * wilc,bool update)1195 u32 wilc_get_chipid(struct wilc *wilc, bool update)
1196 {
1197 static u32 chipid;
1198 u32 tempchipid = 0;
1199 u32 rfrevid = 0;
1200
1201 if (chipid == 0 || update) {
1202 wilc->hif_func->hif_read_reg(wilc, 0x1000, &tempchipid);
1203 wilc->hif_func->hif_read_reg(wilc, 0x13f4, &rfrevid);
1204 if (!is_wilc1000(tempchipid)) {
1205 chipid = 0;
1206 return chipid;
1207 }
1208 if (tempchipid == 0x1002a0) {
1209 if (rfrevid != 0x1)
1210 tempchipid = 0x1002a1;
1211 } else if (tempchipid == 0x1002b0) {
1212 if (rfrevid == 0x4)
1213 tempchipid = 0x1002b1;
1214 else if (rfrevid != 0x3)
1215 tempchipid = 0x1002b2;
1216 }
1217
1218 chipid = tempchipid;
1219 }
1220 return chipid;
1221 }
1222
wilc_wlan_init(struct net_device * dev)1223 int wilc_wlan_init(struct net_device *dev)
1224 {
1225 int ret = 0;
1226 struct wilc_vif *vif = netdev_priv(dev);
1227 struct wilc *wilc;
1228
1229 wilc = vif->wilc;
1230
1231 wilc->quit = 0;
1232
1233 if (!wilc->hif_func->hif_init(wilc, false)) {
1234 ret = -EIO;
1235 goto fail;
1236 }
1237
1238 if (!wilc->tx_buffer)
1239 wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
1240
1241 if (!wilc->tx_buffer) {
1242 ret = -ENOBUFS;
1243 goto fail;
1244 }
1245
1246 if (!wilc->rx_buffer)
1247 wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
1248
1249 if (!wilc->rx_buffer) {
1250 ret = -ENOBUFS;
1251 goto fail;
1252 }
1253
1254 if (!init_chip(dev)) {
1255 ret = -EIO;
1256 goto fail;
1257 }
1258
1259 return 1;
1260
1261 fail:
1262
1263 kfree(wilc->rx_buffer);
1264 wilc->rx_buffer = NULL;
1265 kfree(wilc->tx_buffer);
1266 wilc->tx_buffer = NULL;
1267
1268 return ret;
1269 }
1270