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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 "cfg80211.h"
10#include "wlan_cfg.h"
11
12static inline bool is_wilc1000(u32 id)
13{
14 return (id & (~WILC_CHIP_REV_FIELD)) == WILC_1000_BASE_ID;
15}
16
17static 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
24static 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
31static 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
37static struct txq_entry_t *
38wilc_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
57static 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
74static 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
94static 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
108static 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
117static 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
133static 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
181out:
182 spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
183}
184
185static 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
242void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
243{
244 vif->ack_filter.enabled = value;
245}
246
247static 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
277int 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
308int 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
336static 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
352static 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
368static 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
378static 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
392void chip_allow_sleep(struct wilc *wilc)
393{
394 u32 reg = 0;
395
396 wilc->hif_func->hif_read_reg(wilc, WILC_SDIO_WAKEUP_REG, ®);
397
398 wilc->hif_func->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
399 reg & ~WILC_SDIO_WAKEUP_BIT);
400 wilc->hif_func->hif_write_reg(wilc, WILC_SDIO_HOST_TO_FW_REG, 0);
401}
402EXPORT_SYMBOL_GPL(chip_allow_sleep);
403
404void chip_wakeup(struct wilc *wilc)
405{
406 u32 reg, clk_status_reg;
407 const struct wilc_hif_func *h = wilc->hif_func;
408
409 if (wilc->io_type == WILC_HIF_SPI) {
410 do {
411 h->hif_read_reg(wilc, WILC_SPI_WAKEUP_REG, ®);
412 h->hif_write_reg(wilc, WILC_SPI_WAKEUP_REG,
413 reg | WILC_SPI_WAKEUP_BIT);
414 h->hif_write_reg(wilc, WILC_SPI_WAKEUP_REG,
415 reg & ~WILC_SPI_WAKEUP_BIT);
416
417 do {
418 usleep_range(2000, 2500);
419 wilc_get_chipid(wilc, true);
420 } while (wilc_get_chipid(wilc, true) == 0);
421 } while (wilc_get_chipid(wilc, true) == 0);
422 } else if (wilc->io_type == WILC_HIF_SDIO) {
423 h->hif_write_reg(wilc, WILC_SDIO_HOST_TO_FW_REG,
424 WILC_SDIO_HOST_TO_FW_BIT);
425 usleep_range(200, 400);
426 h->hif_read_reg(wilc, WILC_SDIO_WAKEUP_REG, ®);
427 do {
428 h->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
429 reg | WILC_SDIO_WAKEUP_BIT);
430 h->hif_read_reg(wilc, WILC_SDIO_CLK_STATUS_REG,
431 &clk_status_reg);
432
433 while (!(clk_status_reg & WILC_SDIO_CLK_STATUS_BIT)) {
434 usleep_range(2000, 2500);
435
436 h->hif_read_reg(wilc, WILC_SDIO_CLK_STATUS_REG,
437 &clk_status_reg);
438 }
439 if (!(clk_status_reg & WILC_SDIO_CLK_STATUS_BIT)) {
440 h->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
441 reg & ~WILC_SDIO_WAKEUP_BIT);
442 }
443 } while (!(clk_status_reg & WILC_SDIO_CLK_STATUS_BIT));
444 }
445
446 if (wilc->chip_ps_state == WILC_CHIP_SLEEPING_MANUAL) {
447 if (wilc_get_chipid(wilc, false) < WILC_1000_BASE_ID_2B) {
448 u32 val32;
449
450 h->hif_read_reg(wilc, WILC_REG_4_TO_1_RX, &val32);
451 val32 |= BIT(6);
452 h->hif_write_reg(wilc, WILC_REG_4_TO_1_RX, val32);
453
454 h->hif_read_reg(wilc, WILC_REG_4_TO_1_TX_BANK0, &val32);
455 val32 |= BIT(6);
456 h->hif_write_reg(wilc, WILC_REG_4_TO_1_TX_BANK0, val32);
457 }
458 }
459 wilc->chip_ps_state = WILC_CHIP_WAKEDUP;
460}
461EXPORT_SYMBOL_GPL(chip_wakeup);
462
463void host_wakeup_notify(struct wilc *wilc)
464{
465 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
466 wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1);
467 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
468}
469EXPORT_SYMBOL_GPL(host_wakeup_notify);
470
471void host_sleep_notify(struct wilc *wilc)
472{
473 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
474 wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1);
475 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
476}
477EXPORT_SYMBOL_GPL(host_sleep_notify);
478
479int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
480{
481 int i, entries = 0;
482 u32 sum;
483 u32 reg;
484 u32 offset = 0;
485 int vmm_sz = 0;
486 struct txq_entry_t *tqe;
487 int ret = 0;
488 int counter;
489 int timeout;
490 u32 vmm_table[WILC_VMM_TBL_SIZE];
491 const struct wilc_hif_func *func;
492 u8 *txb = wilc->tx_buffer;
493 struct net_device *dev;
494 struct wilc_vif *vif;
495
496 if (wilc->quit)
497 goto out_update_cnt;
498
499 mutex_lock(&wilc->txq_add_to_head_cs);
500 tqe = wilc_wlan_txq_get_first(wilc);
501 if (!tqe)
502 goto out_unlock;
503 dev = tqe->vif->ndev;
504 wilc_wlan_txq_filter_dup_tcp_ack(dev);
505 i = 0;
506 sum = 0;
507 while (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
508 if (tqe->type == WILC_CFG_PKT)
509 vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
510 else if (tqe->type == WILC_NET_PKT)
511 vmm_sz = ETH_ETHERNET_HDR_OFFSET;
512 else
513 vmm_sz = HOST_HDR_OFFSET;
514
515 vmm_sz += tqe->buffer_size;
516 vmm_sz = ALIGN(vmm_sz, 4);
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 }
530
531 if (i == 0)
532 goto out_unlock;
533 vmm_table[i] = 0x0;
534
535 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
536 counter = 0;
537 func = wilc->hif_func;
538 do {
539 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
540 if (ret)
541 break;
542
543 if ((reg & 0x1) == 0)
544 break;
545
546 counter++;
547 if (counter > 200) {
548 counter = 0;
549 ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
550 break;
551 }
552 } while (!wilc->quit);
553
554 if (ret)
555 goto out_release_bus;
556
557 timeout = 200;
558 do {
559 ret = func->hif_block_tx(wilc,
560 WILC_VMM_TBL_RX_SHADOW_BASE,
561 (u8 *)vmm_table,
562 ((i + 1) * 4));
563 if (ret)
564 break;
565
566 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
567 if (ret)
568 break;
569
570 do {
571 ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, ®);
572 if (ret)
573 break;
574 if (FIELD_GET(WILC_VMM_ENTRY_AVAILABLE, reg)) {
575 entries = FIELD_GET(WILC_VMM_ENTRY_COUNT, reg);
576 break;
577 }
578 } while (--timeout);
579 if (timeout <= 0) {
580 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
581 break;
582 }
583
584 if (ret)
585 break;
586
587 if (entries == 0) {
588 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
589 if (ret)
590 break;
591 reg &= ~BIT(0);
592 ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
593 }
594 } while (0);
595
596 if (ret)
597 goto out_release_bus;
598
599 if (entries == 0) {
600 /*
601 * No VMM space available in firmware so retry to transmit
602 * the packet from tx queue.
603 */
604 ret = WILC_VMM_ENTRY_FULL_RETRY;
605 goto out_release_bus;
606 }
607
608 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
609
610 offset = 0;
611 i = 0;
612 do {
613 u32 header, buffer_offset;
614 char *bssid;
615 u8 mgmt_ptk = 0;
616
617 tqe = wilc_wlan_txq_remove_from_head(dev);
618 if (!tqe)
619 break;
620
621 vif = tqe->vif;
622 if (vmm_table[i] == 0)
623 break;
624
625 le32_to_cpus(&vmm_table[i]);
626 vmm_sz = FIELD_GET(WILC_VMM_BUFFER_SIZE, vmm_table[i]);
627 vmm_sz *= 4;
628
629 if (tqe->type == WILC_MGMT_PKT)
630 mgmt_ptk = 1;
631
632 header = (FIELD_PREP(WILC_VMM_HDR_TYPE, tqe->type) |
633 FIELD_PREP(WILC_VMM_HDR_MGMT_FIELD, mgmt_ptk) |
634 FIELD_PREP(WILC_VMM_HDR_PKT_SIZE, tqe->buffer_size) |
635 FIELD_PREP(WILC_VMM_HDR_BUFF_SIZE, vmm_sz));
636
637 cpu_to_le32s(&header);
638 memcpy(&txb[offset], &header, 4);
639 if (tqe->type == WILC_CFG_PKT) {
640 buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
641 } else if (tqe->type == WILC_NET_PKT) {
642 bssid = tqe->vif->bssid;
643 buffer_offset = ETH_ETHERNET_HDR_OFFSET;
644 memcpy(&txb[offset + 8], bssid, 6);
645 } else {
646 buffer_offset = HOST_HDR_OFFSET;
647 }
648
649 memcpy(&txb[offset + buffer_offset],
650 tqe->buffer, tqe->buffer_size);
651 offset += vmm_sz;
652 i++;
653 tqe->status = 1;
654 if (tqe->tx_complete_func)
655 tqe->tx_complete_func(tqe->priv, tqe->status);
656 if (tqe->ack_idx != NOT_TCP_ACK &&
657 tqe->ack_idx < MAX_PENDING_ACKS)
658 vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
659 kfree(tqe);
660 } while (--entries);
661
662 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
663
664 ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
665 if (ret)
666 goto out_release_bus;
667
668 ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
669
670out_release_bus:
671 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
672
673out_unlock:
674 mutex_unlock(&wilc->txq_add_to_head_cs);
675
676out_update_cnt:
677 *txq_count = wilc->txq_entries;
678 return ret;
679}
680
681static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
682{
683 int offset = 0;
684 u32 header;
685 u32 pkt_len, pkt_offset, tp_len;
686 int is_cfg_packet;
687 u8 *buff_ptr;
688
689 do {
690 buff_ptr = buffer + offset;
691 header = get_unaligned_le32(buff_ptr);
692
693 is_cfg_packet = FIELD_GET(WILC_PKT_HDR_CONFIG_FIELD, header);
694 pkt_offset = FIELD_GET(WILC_PKT_HDR_OFFSET_FIELD, header);
695 tp_len = FIELD_GET(WILC_PKT_HDR_TOTAL_LEN_FIELD, header);
696 pkt_len = FIELD_GET(WILC_PKT_HDR_LEN_FIELD, header);
697
698 if (pkt_len == 0 || tp_len == 0)
699 break;
700
701 if (pkt_offset & IS_MANAGMEMENT) {
702 buff_ptr += HOST_HDR_OFFSET;
703 wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
704 } else {
705 if (!is_cfg_packet) {
706 wilc_frmw_to_host(wilc, buff_ptr, pkt_len,
707 pkt_offset);
708 } else {
709 struct wilc_cfg_rsp rsp;
710
711 buff_ptr += pkt_offset;
712
713 wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
714 pkt_len,
715 &rsp);
716 if (rsp.type == WILC_CFG_RSP) {
717 if (wilc->cfg_seq_no == rsp.seq_no)
718 complete(&wilc->cfg_event);
719 } else if (rsp.type == WILC_CFG_RSP_STATUS) {
720 wilc_mac_indicate(wilc);
721 }
722 }
723 }
724 offset += tp_len;
725 } while (offset < size);
726}
727
728static void wilc_wlan_handle_rxq(struct wilc *wilc)
729{
730 int size;
731 u8 *buffer;
732 struct rxq_entry_t *rqe;
733
734 while (!wilc->quit) {
735 rqe = wilc_wlan_rxq_remove(wilc);
736 if (!rqe)
737 break;
738
739 buffer = rqe->buffer;
740 size = rqe->buffer_size;
741 wilc_wlan_handle_rx_buff(wilc, buffer, size);
742
743 kfree(rqe);
744 }
745 if (wilc->quit)
746 complete(&wilc->cfg_event);
747}
748
749static void wilc_unknown_isr_ext(struct wilc *wilc)
750{
751 wilc->hif_func->hif_clear_int_ext(wilc, 0);
752}
753
754static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
755{
756 u32 offset = wilc->rx_buffer_offset;
757 u8 *buffer = NULL;
758 u32 size;
759 u32 retries = 0;
760 int ret = 0;
761 struct rxq_entry_t *rqe;
762
763 size = FIELD_GET(WILC_INTERRUPT_DATA_SIZE, int_status) << 2;
764
765 while (!size && retries < 10) {
766 wilc->hif_func->hif_read_size(wilc, &size);
767 size = FIELD_GET(WILC_INTERRUPT_DATA_SIZE, size) << 2;
768 retries++;
769 }
770
771 if (size <= 0)
772 return;
773
774 if (WILC_RX_BUFF_SIZE - offset < size)
775 offset = 0;
776
777 buffer = &wilc->rx_buffer[offset];
778
779 wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
780 ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
781 if (ret)
782 return;
783
784 offset += size;
785 wilc->rx_buffer_offset = offset;
786 rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
787 if (!rqe)
788 return;
789
790 rqe->buffer = buffer;
791 rqe->buffer_size = size;
792 wilc_wlan_rxq_add(wilc, rqe);
793 wilc_wlan_handle_rxq(wilc);
794}
795
796void wilc_handle_isr(struct wilc *wilc)
797{
798 u32 int_status;
799
800 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
801 wilc->hif_func->hif_read_int(wilc, &int_status);
802
803 if (int_status & DATA_INT_EXT)
804 wilc_wlan_handle_isr_ext(wilc, int_status);
805
806 if (!(int_status & (ALL_INT_EXT)))
807 wilc_unknown_isr_ext(wilc);
808
809 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
810}
811EXPORT_SYMBOL_GPL(wilc_handle_isr);
812
813int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
814 u32 buffer_size)
815{
816 u32 offset;
817 u32 addr, size, size2, blksz;
818 u8 *dma_buffer;
819 int ret = 0;
820
821 blksz = BIT(12);
822
823 dma_buffer = kmalloc(blksz, GFP_KERNEL);
824 if (!dma_buffer)
825 return -EIO;
826
827 offset = 0;
828 do {
829 addr = get_unaligned_le32(&buffer[offset]);
830 size = get_unaligned_le32(&buffer[offset + 4]);
831 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
832 offset += 8;
833 while (((int)size) && (offset < buffer_size)) {
834 if (size <= blksz)
835 size2 = size;
836 else
837 size2 = blksz;
838
839 memcpy(dma_buffer, &buffer[offset], size2);
840 ret = wilc->hif_func->hif_block_tx(wilc, addr,
841 dma_buffer, size2);
842 if (ret)
843 break;
844
845 addr += size2;
846 offset += size2;
847 size -= size2;
848 }
849 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
850
851 if (ret)
852 goto fail;
853 } while (offset < buffer_size);
854
855fail:
856
857 kfree(dma_buffer);
858
859 return ret;
860}
861
862int wilc_wlan_start(struct wilc *wilc)
863{
864 u32 reg = 0;
865 int ret;
866 u32 chipid;
867
868 if (wilc->io_type == WILC_HIF_SDIO) {
869 reg = 0;
870 reg |= BIT(3);
871 } else if (wilc->io_type == WILC_HIF_SPI) {
872 reg = 1;
873 }
874 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
875 ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
876 if (ret) {
877 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
878 return ret;
879 }
880 reg = 0;
881 if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
882 reg |= WILC_HAVE_SDIO_IRQ_GPIO;
883
884 ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
885 if (ret) {
886 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
887 return ret;
888 }
889
890 wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
891
892 ret = wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
893 if (ret) {
894 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
895 return ret;
896 }
897
898 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
899 if ((reg & BIT(10)) == BIT(10)) {
900 reg &= ~BIT(10);
901 wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
902 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
903 }
904
905 reg |= BIT(10);
906 ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
907 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
908 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
909
910 return ret;
911}
912
913int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
914{
915 u32 reg = 0;
916 int ret;
917
918 acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
919
920 ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, ®);
921 if (ret) {
922 netdev_err(vif->ndev, "Error while reading reg\n");
923 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
924 return ret;
925 }
926
927 ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
928 (reg | WILC_ABORT_REQ_BIT));
929 if (ret) {
930 netdev_err(vif->ndev, "Error while writing reg\n");
931 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
932 return ret;
933 }
934
935 ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, ®);
936 if (ret) {
937 netdev_err(vif->ndev, "Error while reading reg\n");
938 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
939 return ret;
940 }
941 reg = BIT(0);
942
943 ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg);
944 if (ret) {
945 netdev_err(vif->ndev, "Error while writing reg\n");
946 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
947 return ret;
948 }
949
950 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
951
952 return 0;
953}
954
955void wilc_wlan_cleanup(struct net_device *dev)
956{
957 struct txq_entry_t *tqe;
958 struct rxq_entry_t *rqe;
959 struct wilc_vif *vif = netdev_priv(dev);
960 struct wilc *wilc = vif->wilc;
961
962 wilc->quit = 1;
963 while ((tqe = wilc_wlan_txq_remove_from_head(dev))) {
964 if (tqe->tx_complete_func)
965 tqe->tx_complete_func(tqe->priv, 0);
966 kfree(tqe);
967 }
968
969 while ((rqe = wilc_wlan_rxq_remove(wilc)))
970 kfree(rqe);
971
972 kfree(wilc->rx_buffer);
973 wilc->rx_buffer = NULL;
974 kfree(wilc->tx_buffer);
975 wilc->tx_buffer = NULL;
976 wilc->hif_func->hif_deinit(NULL);
977}
978
979static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
980 u32 drv_handler)
981{
982 struct wilc *wilc = vif->wilc;
983 struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
984 int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
985
986 if (type == WILC_CFG_SET)
987 cfg->hdr.cmd_type = 'W';
988 else
989 cfg->hdr.cmd_type = 'Q';
990
991 cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
992 cfg->hdr.total_len = cpu_to_le16(t_len);
993 cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
994 wilc->cfg_seq_no = cfg->hdr.seq_no;
995
996 if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
997 return -1;
998
999 return 0;
1000}
1001
1002int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1003 u32 buffer_size, int commit, u32 drv_handler)
1004{
1005 u32 offset;
1006 int ret_size;
1007 struct wilc *wilc = vif->wilc;
1008
1009 mutex_lock(&wilc->cfg_cmd_lock);
1010
1011 if (start)
1012 wilc->cfg_frame_offset = 0;
1013
1014 offset = wilc->cfg_frame_offset;
1015 ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1016 wid, buffer, buffer_size);
1017 offset += ret_size;
1018 wilc->cfg_frame_offset = offset;
1019
1020 if (!commit) {
1021 mutex_unlock(&wilc->cfg_cmd_lock);
1022 return ret_size;
1023 }
1024
1025 netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1026
1027 if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1028 ret_size = 0;
1029
1030 if (!wait_for_completion_timeout(&wilc->cfg_event,
1031 WILC_CFG_PKTS_TIMEOUT)) {
1032 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1033 ret_size = 0;
1034 }
1035
1036 wilc->cfg_frame_offset = 0;
1037 wilc->cfg_seq_no += 1;
1038 mutex_unlock(&wilc->cfg_cmd_lock);
1039
1040 return ret_size;
1041}
1042
1043int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1044 u32 drv_handler)
1045{
1046 u32 offset;
1047 int ret_size;
1048 struct wilc *wilc = vif->wilc;
1049
1050 mutex_lock(&wilc->cfg_cmd_lock);
1051
1052 if (start)
1053 wilc->cfg_frame_offset = 0;
1054
1055 offset = wilc->cfg_frame_offset;
1056 ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
1057 offset += ret_size;
1058 wilc->cfg_frame_offset = offset;
1059
1060 if (!commit) {
1061 mutex_unlock(&wilc->cfg_cmd_lock);
1062 return ret_size;
1063 }
1064
1065 if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1066 ret_size = 0;
1067
1068 if (!wait_for_completion_timeout(&wilc->cfg_event,
1069 WILC_CFG_PKTS_TIMEOUT)) {
1070 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1071 ret_size = 0;
1072 }
1073 wilc->cfg_frame_offset = 0;
1074 wilc->cfg_seq_no += 1;
1075 mutex_unlock(&wilc->cfg_cmd_lock);
1076
1077 return ret_size;
1078}
1079
1080int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1081 u32 count)
1082{
1083 int i;
1084 int ret = 0;
1085 u32 drv = wilc_get_vif_idx(vif);
1086
1087 if (mode == WILC_GET_CFG) {
1088 for (i = 0; i < count; i++) {
1089 if (!wilc_wlan_cfg_get(vif, !i,
1090 wids[i].id,
1091 (i == count - 1),
1092 drv)) {
1093 ret = -ETIMEDOUT;
1094 break;
1095 }
1096 }
1097 for (i = 0; i < count; i++) {
1098 wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1099 wids[i].id,
1100 wids[i].val,
1101 wids[i].size);
1102 }
1103 } else if (mode == WILC_SET_CFG) {
1104 for (i = 0; i < count; i++) {
1105 if (!wilc_wlan_cfg_set(vif, !i,
1106 wids[i].id,
1107 wids[i].val,
1108 wids[i].size,
1109 (i == count - 1),
1110 drv)) {
1111 ret = -ETIMEDOUT;
1112 break;
1113 }
1114 }
1115 }
1116
1117 return ret;
1118}
1119
1120static int init_chip(struct net_device *dev)
1121{
1122 u32 chipid;
1123 u32 reg;
1124 int ret = 0;
1125 struct wilc_vif *vif = netdev_priv(dev);
1126 struct wilc *wilc = vif->wilc;
1127
1128 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1129
1130 chipid = wilc_get_chipid(wilc, true);
1131
1132 if ((chipid & 0xfff) != 0xa0) {
1133 ret = wilc->hif_func->hif_read_reg(wilc,
1134 WILC_CORTUS_RESET_MUX_SEL,
1135 ®);
1136 if (ret) {
1137 netdev_err(dev, "fail read reg 0x1118\n");
1138 goto release;
1139 }
1140 reg |= BIT(0);
1141 ret = wilc->hif_func->hif_write_reg(wilc,
1142 WILC_CORTUS_RESET_MUX_SEL,
1143 reg);
1144 if (ret) {
1145 netdev_err(dev, "fail write reg 0x1118\n");
1146 goto release;
1147 }
1148 ret = wilc->hif_func->hif_write_reg(wilc,
1149 WILC_CORTUS_BOOT_REGISTER,
1150 WILC_CORTUS_BOOT_FROM_IRAM);
1151 if (ret) {
1152 netdev_err(dev, "fail write reg 0xc0000\n");
1153 goto release;
1154 }
1155 }
1156
1157release:
1158 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1159
1160 return ret;
1161}
1162
1163u32 wilc_get_chipid(struct wilc *wilc, bool update)
1164{
1165 static u32 chipid;
1166 u32 tempchipid = 0;
1167 u32 rfrevid = 0;
1168
1169 if (chipid == 0 || update) {
1170 wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &tempchipid);
1171 wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
1172 &rfrevid);
1173 if (!is_wilc1000(tempchipid)) {
1174 chipid = 0;
1175 return chipid;
1176 }
1177 if (tempchipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
1178 if (rfrevid != 0x1)
1179 tempchipid = WILC_1000_BASE_ID_2A_REV1;
1180 } else if (tempchipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
1181 if (rfrevid == 0x4)
1182 tempchipid = WILC_1000_BASE_ID_2B_REV1;
1183 else if (rfrevid != 0x3)
1184 tempchipid = WILC_1000_BASE_ID_2B_REV2;
1185 }
1186
1187 chipid = tempchipid;
1188 }
1189 return chipid;
1190}
1191
1192int wilc_wlan_init(struct net_device *dev)
1193{
1194 int ret = 0;
1195 struct wilc_vif *vif = netdev_priv(dev);
1196 struct wilc *wilc;
1197
1198 wilc = vif->wilc;
1199
1200 wilc->quit = 0;
1201
1202 if (wilc->hif_func->hif_init(wilc, false)) {
1203 ret = -EIO;
1204 goto fail;
1205 }
1206
1207 if (!wilc->tx_buffer)
1208 wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
1209
1210 if (!wilc->tx_buffer) {
1211 ret = -ENOBUFS;
1212 goto fail;
1213 }
1214
1215 if (!wilc->rx_buffer)
1216 wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
1217
1218 if (!wilc->rx_buffer) {
1219 ret = -ENOBUFS;
1220 goto fail;
1221 }
1222
1223 if (init_chip(dev)) {
1224 ret = -EIO;
1225 goto fail;
1226 }
1227
1228 return 0;
1229
1230fail:
1231
1232 kfree(wilc->rx_buffer);
1233 wilc->rx_buffer = NULL;
1234 kfree(wilc->tx_buffer);
1235 wilc->tx_buffer = NULL;
1236
1237 return ret;
1238}