1
2
3
4#include "wifi.h"
5#include "core.h"
6#include "usb.h"
7#include "base.h"
8#include "ps.h"
9#include "rtl8192c/fw_common.h"
10#include <linux/export.h>
11#include <linux/module.h>
12
13MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
14MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
15MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
16MODULE_LICENSE("GPL");
17MODULE_DESCRIPTION("USB basic driver for rtlwifi");
18
19#define REALTEK_USB_VENQT_READ 0xC0
20#define REALTEK_USB_VENQT_WRITE 0x40
21#define REALTEK_USB_VENQT_CMD_REQ 0x05
22#define REALTEK_USB_VENQT_CMD_IDX 0x00
23
24#define MAX_USBCTRL_VENDORREQ_TIMES 10
25
26static void usbctrl_async_callback(struct urb *urb)
27{
28 if (urb) {
29
30 kfree(urb->setup_packet);
31
32 kfree(urb->transfer_buffer);
33 }
34}
35
36static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
37 u16 value, u16 index, void *pdata,
38 u16 len)
39{
40 int rc;
41 unsigned int pipe;
42 u8 reqtype;
43 struct usb_ctrlrequest *dr;
44 struct urb *urb;
45 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
46 u8 *databuf;
47
48 if (WARN_ON_ONCE(len > databuf_maxlen))
49 len = databuf_maxlen;
50
51 pipe = usb_sndctrlpipe(udev, 0);
52 reqtype = REALTEK_USB_VENQT_WRITE;
53
54 dr = kzalloc(sizeof(*dr), GFP_ATOMIC);
55 if (!dr)
56 return -ENOMEM;
57
58 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC);
59 if (!databuf) {
60 kfree(dr);
61 return -ENOMEM;
62 }
63
64 urb = usb_alloc_urb(0, GFP_ATOMIC);
65 if (!urb) {
66 kfree(databuf);
67 kfree(dr);
68 return -ENOMEM;
69 }
70
71 dr->bRequestType = reqtype;
72 dr->bRequest = request;
73 dr->wValue = cpu_to_le16(value);
74 dr->wIndex = cpu_to_le16(index);
75 dr->wLength = cpu_to_le16(len);
76
77 memcpy(databuf, pdata, len);
78 usb_fill_control_urb(urb, udev, pipe,
79 (unsigned char *)dr, databuf, len,
80 usbctrl_async_callback, NULL);
81 rc = usb_submit_urb(urb, GFP_ATOMIC);
82 if (rc < 0) {
83 kfree(databuf);
84 kfree(dr);
85 }
86 usb_free_urb(urb);
87 return rc;
88}
89
90static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
91 u16 value, u16 index, void *pdata,
92 u16 len)
93{
94 unsigned int pipe;
95 int status;
96 u8 reqtype;
97 int vendorreq_times = 0;
98 static int count;
99
100 pipe = usb_rcvctrlpipe(udev, 0);
101 reqtype = REALTEK_USB_VENQT_READ;
102
103 do {
104 status = usb_control_msg(udev, pipe, request, reqtype, value,
105 index, pdata, len, 1000);
106 if (status < 0) {
107
108 if ((value >= FW_8192C_START_ADDRESS &&
109 value <= FW_8192C_END_ADDRESS))
110 break;
111 } else {
112 break;
113 }
114 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
115
116 if (status < 0 && count++ < 4)
117 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
118 value, status, *(u32 *)pdata);
119 return status;
120}
121
122static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
123{
124 struct device *dev = rtlpriv->io.dev;
125 struct usb_device *udev = to_usb_device(dev);
126 u8 request;
127 u16 wvalue;
128 u16 index;
129 __le32 *data;
130 unsigned long flags;
131
132 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
133 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
134 rtlpriv->usb_data_index = 0;
135 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
136 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
137 request = REALTEK_USB_VENQT_CMD_REQ;
138 index = REALTEK_USB_VENQT_CMD_IDX;
139
140 wvalue = (u16)addr;
141 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
142 return le32_to_cpu(*data);
143}
144
145static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
146{
147 return (u8)_usb_read_sync(rtlpriv, addr, 1);
148}
149
150static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
151{
152 return (u16)_usb_read_sync(rtlpriv, addr, 2);
153}
154
155static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
156{
157 return _usb_read_sync(rtlpriv, addr, 4);
158}
159
160static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
161 u16 len)
162{
163 u8 request;
164 u16 wvalue;
165 u16 index;
166 __le32 data;
167
168 request = REALTEK_USB_VENQT_CMD_REQ;
169 index = REALTEK_USB_VENQT_CMD_IDX;
170 wvalue = (u16)(addr&0x0000ffff);
171 data = cpu_to_le32(val);
172 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
173 len);
174}
175
176static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
177{
178 struct device *dev = rtlpriv->io.dev;
179
180 _usb_write_async(to_usb_device(dev), addr, val, 1);
181}
182
183static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
184{
185 struct device *dev = rtlpriv->io.dev;
186
187 _usb_write_async(to_usb_device(dev), addr, val, 2);
188}
189
190static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
191{
192 struct device *dev = rtlpriv->io.dev;
193
194 _usb_write_async(to_usb_device(dev), addr, val, 4);
195}
196
197static void _usb_writen_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
198 u16 len)
199{
200 struct device *dev = rtlpriv->io.dev;
201 struct usb_device *udev = to_usb_device(dev);
202 u8 request = REALTEK_USB_VENQT_CMD_REQ;
203 u8 reqtype = REALTEK_USB_VENQT_WRITE;
204 u16 wvalue;
205 u16 index = REALTEK_USB_VENQT_CMD_IDX;
206 int pipe = usb_sndctrlpipe(udev, 0);
207 u8 *buffer;
208
209 wvalue = (u16)(addr & 0x0000ffff);
210 buffer = kmemdup(data, len, GFP_ATOMIC);
211 if (!buffer)
212 return;
213 usb_control_msg(udev, pipe, request, reqtype, wvalue,
214 index, buffer, len, 50);
215
216 kfree(buffer);
217}
218
219static void _rtl_usb_io_handler_init(struct device *dev,
220 struct ieee80211_hw *hw)
221{
222 struct rtl_priv *rtlpriv = rtl_priv(hw);
223
224 rtlpriv->io.dev = dev;
225 mutex_init(&rtlpriv->io.bb_mutex);
226 rtlpriv->io.write8_async = _usb_write8_async;
227 rtlpriv->io.write16_async = _usb_write16_async;
228 rtlpriv->io.write32_async = _usb_write32_async;
229 rtlpriv->io.read8_sync = _usb_read8_sync;
230 rtlpriv->io.read16_sync = _usb_read16_sync;
231 rtlpriv->io.read32_sync = _usb_read32_sync;
232 rtlpriv->io.writen_sync = _usb_writen_sync;
233}
234
235static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
236{
237 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
238
239 mutex_destroy(&rtlpriv->io.bb_mutex);
240}
241
242
243
244
245
246static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
247 struct sk_buff_head *list)
248{
249 return skb_dequeue(list);
250}
251
252#define IS_HIGH_SPEED_USB(udev) \
253 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
254
255static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
256{
257 u32 i;
258 struct rtl_priv *rtlpriv = rtl_priv(hw);
259 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
260
261 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
262 ? USB_HIGH_SPEED_BULK_SIZE
263 : USB_FULL_SPEED_BULK_SIZE;
264
265 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
266 rtlusb->max_bulk_out_size);
267
268 for (i = 0; i < __RTL_TXQ_NUM; i++) {
269 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
270
271 if (!ep_num) {
272 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
273 "Invalid endpoint map setting!\n");
274 return -EINVAL;
275 }
276 }
277
278 rtlusb->usb_tx_post_hdl =
279 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
280 rtlusb->usb_tx_cleanup =
281 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
282 rtlusb->usb_tx_aggregate_hdl =
283 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
284 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
285 : &_none_usb_tx_aggregate_hdl;
286
287 init_usb_anchor(&rtlusb->tx_submitted);
288 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
289 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
290 init_usb_anchor(&rtlusb->tx_pending[i]);
291 }
292 return 0;
293}
294
295static void _rtl_rx_work(unsigned long param);
296
297static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
298{
299 struct rtl_priv *rtlpriv = rtl_priv(hw);
300 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
301 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
302
303 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
304 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
305 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
306 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
307 rtlusb->usb_rx_segregate_hdl =
308 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
309
310 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
311 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
312 init_usb_anchor(&rtlusb->rx_submitted);
313 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
314
315 skb_queue_head_init(&rtlusb->rx_queue);
316 rtlusb->rx_work_tasklet.func = _rtl_rx_work;
317 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
318
319 return 0;
320}
321
322static int _rtl_usb_init(struct ieee80211_hw *hw)
323{
324 struct rtl_priv *rtlpriv = rtl_priv(hw);
325 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
326 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
327 int err;
328 u8 epidx;
329 struct usb_interface *usb_intf = rtlusb->intf;
330 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
331
332 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
333 for (epidx = 0; epidx < epnums; epidx++) {
334 struct usb_endpoint_descriptor *pep_desc;
335
336 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
337
338 if (usb_endpoint_dir_in(pep_desc))
339 rtlusb->in_ep_nums++;
340 else if (usb_endpoint_dir_out(pep_desc))
341 rtlusb->out_ep_nums++;
342
343 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
344 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
345 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
346 pep_desc->bInterval);
347 }
348 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
349 pr_err("Too few input end points found\n");
350 return -EINVAL;
351 }
352 if (rtlusb->out_ep_nums == 0) {
353 pr_err("No output end points found\n");
354 return -EINVAL;
355 }
356
357 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
358 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
359 _rtl_usb_init_tx(hw);
360 _rtl_usb_init_rx(hw);
361 return err;
362}
363
364static void rtl_usb_init_sw(struct ieee80211_hw *hw)
365{
366 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
367 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
368 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
369 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
370
371 rtlhal->hw = hw;
372 ppsc->inactiveps = false;
373 ppsc->leisure_ps = false;
374 ppsc->fwctrl_lps = false;
375 ppsc->reg_fwctrl_lps = 3;
376 ppsc->reg_max_lps_awakeintvl = 5;
377 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
378
379
380 mac->beacon_interval = 100;
381
382
383 mac->min_space_cfg = 0;
384 mac->max_mss_density = 0;
385
386
387 mac->current_ampdu_density = 7;
388 mac->current_ampdu_factor = 3;
389
390
391 rtlusb->acm_method = EACMWAY2_SW;
392
393
394
395 rtlusb->irq_mask[0] = 0xFFFFFFFF;
396
397 rtlusb->irq_mask[1] = 0xFFFFFFFF;
398 rtlusb->disablehwsm = true;
399}
400
401static void _rtl_rx_completed(struct urb *urb);
402
403static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
404 struct urb *urb, gfp_t gfp_mask)
405{
406 void *buf;
407
408 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
409 &urb->transfer_dma);
410 if (!buf) {
411 pr_err("Failed to usb_alloc_coherent!!\n");
412 return -ENOMEM;
413 }
414
415 usb_fill_bulk_urb(urb, rtlusb->udev,
416 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
417 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
418 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
419
420 return 0;
421}
422
423static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
424 struct sk_buff *skb)
425{
426 struct rtl_priv *rtlpriv = rtl_priv(hw);
427 u8 *rxdesc = skb->data;
428 struct ieee80211_hdr *hdr;
429 bool unicast = false;
430 __le16 fc;
431 struct ieee80211_rx_status rx_status = {0};
432 struct rtl_stats stats = {
433 .signal = 0,
434 .rate = 0,
435 };
436
437 skb_pull(skb, RTL_RX_DESC_SIZE);
438 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
439 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
440 hdr = (struct ieee80211_hdr *)(skb->data);
441 fc = hdr->frame_control;
442 if (!stats.crc) {
443 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
444
445 if (is_broadcast_ether_addr(hdr->addr1)) {
446 ;
447 } else if (is_multicast_ether_addr(hdr->addr1)) {
448
449 } else {
450 unicast = true;
451 rtlpriv->stats.rxbytesunicast += skb->len;
452 }
453
454 if (ieee80211_is_data(fc)) {
455 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
456
457 if (unicast)
458 rtlpriv->link_info.num_rx_inperiod++;
459 }
460
461 rtl_beacon_statistic(hw, skb);
462 }
463}
464
465static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
466 struct sk_buff *skb)
467{
468 struct rtl_priv *rtlpriv = rtl_priv(hw);
469 u8 *rxdesc = skb->data;
470 struct ieee80211_hdr *hdr;
471 bool unicast = false;
472 __le16 fc;
473 struct ieee80211_rx_status rx_status = {0};
474 struct rtl_stats stats = {
475 .signal = 0,
476 .rate = 0,
477 };
478
479 skb_pull(skb, RTL_RX_DESC_SIZE);
480 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
481 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
482 hdr = (struct ieee80211_hdr *)(skb->data);
483 fc = hdr->frame_control;
484 if (!stats.crc) {
485 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
486
487 if (is_broadcast_ether_addr(hdr->addr1)) {
488 ;
489 } else if (is_multicast_ether_addr(hdr->addr1)) {
490
491 } else {
492 unicast = true;
493 rtlpriv->stats.rxbytesunicast += skb->len;
494 }
495
496 if (ieee80211_is_data(fc)) {
497 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
498
499 if (unicast)
500 rtlpriv->link_info.num_rx_inperiod++;
501 }
502
503
504 rtl_beacon_statistic(hw, skb);
505
506 if (likely(rtl_action_proc(hw, skb, false)))
507 ieee80211_rx(hw, skb);
508 else
509 dev_kfree_skb_any(skb);
510 } else {
511 dev_kfree_skb_any(skb);
512 }
513}
514
515static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
516{
517 struct sk_buff *_skb;
518 struct sk_buff_head rx_queue;
519 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
520
521 skb_queue_head_init(&rx_queue);
522 if (rtlusb->usb_rx_segregate_hdl)
523 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
524 WARN_ON(skb_queue_empty(&rx_queue));
525 while (!skb_queue_empty(&rx_queue)) {
526 _skb = skb_dequeue(&rx_queue);
527 _rtl_usb_rx_process_agg(hw, _skb);
528 ieee80211_rx(hw, _skb);
529 }
530}
531
532#define __RX_SKB_MAX_QUEUED 64
533
534static void _rtl_rx_work(unsigned long param)
535{
536 struct rtl_usb *rtlusb = (struct rtl_usb *)param;
537 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
538 struct sk_buff *skb;
539
540 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
541 if (unlikely(IS_USB_STOP(rtlusb))) {
542 dev_kfree_skb_any(skb);
543 continue;
544 }
545
546 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
547 _rtl_usb_rx_process_noagg(hw, skb);
548 } else {
549
550 _rtl_rx_pre_process(hw, skb);
551 pr_err("rx agg not supported\n");
552 }
553 }
554}
555
556static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
557 unsigned int len)
558{
559#if NET_IP_ALIGN != 0
560 unsigned int padding = 0;
561#endif
562
563
564 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
565 return 0;
566
567#if NET_IP_ALIGN != 0
568
569
570
571 if (ieee80211_is_data_qos(hdr->frame_control)) {
572 u8 *qc = ieee80211_get_qos_ctl(hdr);
573
574 padding ^= NET_IP_ALIGN;
575
576
577
578
579 if ((unsigned long)qc - (unsigned long)hdr < len &&
580 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
581 padding ^= NET_IP_ALIGN;
582 }
583
584 if (ieee80211_has_a4(hdr->frame_control))
585 padding ^= NET_IP_ALIGN;
586
587 return padding;
588#endif
589}
590
591#define __RADIO_TAP_SIZE_RSV 32
592
593static void _rtl_rx_completed(struct urb *_urb)
594{
595 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
596 int err = 0;
597
598 if (unlikely(IS_USB_STOP(rtlusb)))
599 goto free;
600
601 if (likely(0 == _urb->status)) {
602 unsigned int padding;
603 struct sk_buff *skb;
604 unsigned int qlen;
605 unsigned int size = _urb->actual_length;
606 struct ieee80211_hdr *hdr;
607
608 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
609 pr_err("Too short packet from bulk IN! (len: %d)\n",
610 size);
611 goto resubmit;
612 }
613
614 qlen = skb_queue_len(&rtlusb->rx_queue);
615 if (qlen >= __RX_SKB_MAX_QUEUED) {
616 pr_err("Pending RX skbuff queue full! (qlen: %d)\n",
617 qlen);
618 goto resubmit;
619 }
620
621 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
622 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
623
624 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
625 if (!skb) {
626 pr_err("Can't allocate skb for bulk IN!\n");
627 goto resubmit;
628 }
629
630 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
631
632
633 skb_reserve(skb, padding);
634
635
636 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
637
638 skb_put_data(skb, _urb->transfer_buffer, size);
639
640 skb_queue_tail(&rtlusb->rx_queue, skb);
641 tasklet_schedule(&rtlusb->rx_work_tasklet);
642
643 goto resubmit;
644 }
645
646 switch (_urb->status) {
647
648 case -ENOENT:
649 case -ECONNRESET:
650 case -ENODEV:
651 case -ESHUTDOWN:
652 goto free;
653 default:
654 break;
655 }
656
657resubmit:
658 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
659 err = usb_submit_urb(_urb, GFP_ATOMIC);
660 if (unlikely(err)) {
661 usb_unanchor_urb(_urb);
662 goto free;
663 }
664 return;
665
666free:
667
668
669
670 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
671}
672
673#undef __RADIO_TAP_SIZE_RSV
674
675static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
676{
677 struct rtl_priv *rtlpriv = rtl_priv(hw);
678 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
679 struct urb *urb;
680
681 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
682
683 tasklet_kill(&rtlusb->rx_work_tasklet);
684 cancel_work_sync(&rtlpriv->works.lps_change_work);
685
686 flush_workqueue(rtlpriv->works.rtl_wq);
687 destroy_workqueue(rtlpriv->works.rtl_wq);
688
689 skb_queue_purge(&rtlusb->rx_queue);
690
691 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
692 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
693 urb->transfer_buffer, urb->transfer_dma);
694 usb_free_urb(urb);
695 }
696}
697
698static int _rtl_usb_receive(struct ieee80211_hw *hw)
699{
700 struct urb *urb;
701 int err;
702 int i;
703 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
704
705 WARN_ON(0 == rtlusb->rx_urb_num);
706
707 WARN_ON(rtlusb->rx_max_size < 1600);
708
709 for (i = 0; i < rtlusb->rx_urb_num; i++) {
710 err = -ENOMEM;
711 urb = usb_alloc_urb(0, GFP_KERNEL);
712 if (!urb)
713 goto err_out;
714
715 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
716 if (err < 0) {
717 pr_err("Failed to prep_rx_urb!!\n");
718 usb_free_urb(urb);
719 goto err_out;
720 }
721
722 usb_anchor_urb(urb, &rtlusb->rx_submitted);
723 err = usb_submit_urb(urb, GFP_KERNEL);
724 if (err)
725 goto err_out;
726 usb_free_urb(urb);
727 }
728 return 0;
729
730err_out:
731 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
732 _rtl_usb_cleanup_rx(hw);
733 return err;
734}
735
736static int rtl_usb_start(struct ieee80211_hw *hw)
737{
738 int err;
739 struct rtl_priv *rtlpriv = rtl_priv(hw);
740 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
741 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
742
743 err = rtlpriv->cfg->ops->hw_init(hw);
744 if (!err) {
745 rtl_init_rx_config(hw);
746
747
748 SET_USB_START(rtlusb);
749
750 set_hal_start(rtlhal);
751
752
753 err = _rtl_usb_receive(hw);
754 }
755
756 return err;
757}
758
759
760
761
762
763
764
765static void rtl_usb_cleanup(struct ieee80211_hw *hw)
766{
767 u32 i;
768 struct sk_buff *_skb;
769 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
770 struct ieee80211_tx_info *txinfo;
771
772
773 _rtl_usb_cleanup_rx(hw);
774
775
776 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
777 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
778 rtlusb->usb_tx_cleanup(hw, _skb);
779 txinfo = IEEE80211_SKB_CB(_skb);
780 ieee80211_tx_info_clear_status(txinfo);
781 txinfo->flags |= IEEE80211_TX_STAT_ACK;
782 ieee80211_tx_status_irqsafe(hw, _skb);
783 }
784 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
785 }
786 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
787}
788
789
790
791
792
793
794static void rtl_usb_deinit(struct ieee80211_hw *hw)
795{
796 rtl_usb_cleanup(hw);
797}
798
799static void rtl_usb_stop(struct ieee80211_hw *hw)
800{
801 struct rtl_priv *rtlpriv = rtl_priv(hw);
802 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
803 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
804 struct urb *urb;
805
806
807 set_hal_stop(rtlhal);
808 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
809
810 SET_USB_STOP(rtlusb);
811
812
813 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
814
815 tasklet_kill(&rtlusb->rx_work_tasklet);
816 cancel_work_sync(&rtlpriv->works.lps_change_work);
817
818 flush_workqueue(rtlpriv->works.rtl_wq);
819
820 skb_queue_purge(&rtlusb->rx_queue);
821
822 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
823 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
824 urb->transfer_buffer, urb->transfer_dma);
825 usb_free_urb(urb);
826 }
827
828 rtlpriv->cfg->ops->hw_disable(hw);
829}
830
831static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
832{
833 int err;
834 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
835
836 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
837 err = usb_submit_urb(_urb, GFP_ATOMIC);
838 if (err < 0) {
839 struct sk_buff *skb;
840
841 pr_err("Failed to submit urb\n");
842 usb_unanchor_urb(_urb);
843 skb = (struct sk_buff *)_urb->context;
844 kfree_skb(skb);
845 }
846 usb_free_urb(_urb);
847}
848
849static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
850 struct sk_buff *skb)
851{
852 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
853 struct ieee80211_tx_info *txinfo;
854
855 rtlusb->usb_tx_post_hdl(hw, urb, skb);
856 skb_pull(skb, RTL_TX_HEADER_SIZE);
857 txinfo = IEEE80211_SKB_CB(skb);
858 ieee80211_tx_info_clear_status(txinfo);
859 txinfo->flags |= IEEE80211_TX_STAT_ACK;
860
861 if (urb->status) {
862 pr_err("Urb has error status 0x%X\n", urb->status);
863 goto out;
864 }
865
866out:
867 ieee80211_tx_status_irqsafe(hw, skb);
868 return urb->status;
869}
870
871static void _rtl_tx_complete(struct urb *urb)
872{
873 struct sk_buff *skb = (struct sk_buff *)urb->context;
874 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
875 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
876 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
877 int err;
878
879 if (unlikely(IS_USB_STOP(rtlusb)))
880 return;
881 err = _usb_tx_post(hw, urb, skb);
882 if (err) {
883
884 return;
885 }
886}
887
888static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
889 struct sk_buff *skb, u32 ep_num)
890{
891 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
892 struct urb *_urb;
893
894 WARN_ON(NULL == skb);
895 _urb = usb_alloc_urb(0, GFP_ATOMIC);
896 if (!_urb) {
897 kfree_skb(skb);
898 return NULL;
899 }
900 _rtl_install_trx_info(rtlusb, skb, ep_num);
901 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
902 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
903 _urb->transfer_flags |= URB_ZERO_PACKET;
904 return _urb;
905}
906
907static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
908 enum rtl_txq qnum)
909{
910 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
911 u32 ep_num;
912 struct urb *_urb = NULL;
913 struct sk_buff *_skb = NULL;
914
915 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
916 if (unlikely(IS_USB_STOP(rtlusb))) {
917 pr_err("USB device is stopping...\n");
918 kfree_skb(skb);
919 return;
920 }
921 ep_num = rtlusb->ep_map.ep_mapping[qnum];
922 _skb = skb;
923 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
924 if (unlikely(!_urb)) {
925 pr_err("Can't allocate urb. Drop skb!\n");
926 kfree_skb(skb);
927 return;
928 }
929 _rtl_submit_tx_urb(hw, _urb);
930}
931
932static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
933 struct ieee80211_sta *sta,
934 struct sk_buff *skb,
935 u16 hw_queue)
936{
937 struct rtl_priv *rtlpriv = rtl_priv(hw);
938 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
939 struct rtl_tx_desc *pdesc = NULL;
940 struct rtl_tcb_desc tcb_desc;
941 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
942 __le16 fc = hdr->frame_control;
943 u8 *pda_addr = hdr->addr1;
944
945 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
946 if (ieee80211_is_auth(fc)) {
947 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
948 }
949
950 if (rtlpriv->psc.sw_ps_enabled) {
951 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
952 !ieee80211_has_pm(fc))
953 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
954 }
955
956 rtl_action_proc(hw, skb, true);
957 if (is_multicast_ether_addr(pda_addr))
958 rtlpriv->stats.txbytesmulticast += skb->len;
959 else if (is_broadcast_ether_addr(pda_addr))
960 rtlpriv->stats.txbytesbroadcast += skb->len;
961 else
962 rtlpriv->stats.txbytesunicast += skb->len;
963 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
964 hw_queue, &tcb_desc);
965 if (ieee80211_is_data(fc))
966 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
967}
968
969static int rtl_usb_tx(struct ieee80211_hw *hw,
970 struct ieee80211_sta *sta,
971 struct sk_buff *skb,
972 struct rtl_tcb_desc *dummy)
973{
974 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
975 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
976 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
977 __le16 fc = hdr->frame_control;
978 u16 hw_queue;
979
980 if (unlikely(is_hal_stop(rtlhal)))
981 goto err_free;
982 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
983 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
984 _rtl_usb_transmit(hw, skb, hw_queue);
985 return NETDEV_TX_OK;
986
987err_free:
988 dev_kfree_skb_any(skb);
989 return NETDEV_TX_OK;
990}
991
992static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
993 struct ieee80211_sta *sta,
994 struct sk_buff *skb)
995{
996 return false;
997}
998
999static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1000{
1001 struct rtl_works *rtlworks =
1002 container_of(work, struct rtl_works, fill_h2c_cmd);
1003 struct ieee80211_hw *hw = rtlworks->hw;
1004 struct rtl_priv *rtlpriv = rtl_priv(hw);
1005
1006 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1007}
1008
1009static const struct rtl_intf_ops rtl_usb_ops = {
1010 .adapter_start = rtl_usb_start,
1011 .adapter_stop = rtl_usb_stop,
1012 .adapter_tx = rtl_usb_tx,
1013 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1014};
1015
1016int rtl_usb_probe(struct usb_interface *intf,
1017 const struct usb_device_id *id,
1018 struct rtl_hal_cfg *rtl_hal_cfg)
1019{
1020 int err;
1021 struct ieee80211_hw *hw = NULL;
1022 struct rtl_priv *rtlpriv = NULL;
1023 struct usb_device *udev;
1024 struct rtl_usb_priv *usb_priv;
1025
1026 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1027 sizeof(struct rtl_usb_priv), &rtl_ops);
1028 if (!hw) {
1029 WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n");
1030 return -ENOMEM;
1031 }
1032 rtlpriv = hw->priv;
1033 rtlpriv->hw = hw;
1034 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32),
1035 GFP_KERNEL);
1036 if (!rtlpriv->usb_data)
1037 return -ENOMEM;
1038
1039
1040 spin_lock_init(&rtlpriv->locks.usb_lock);
1041 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1042 rtl_fill_h2c_cmd_work_callback);
1043 INIT_WORK(&rtlpriv->works.lps_change_work,
1044 rtl_lps_change_work_callback);
1045
1046 rtlpriv->usb_data_index = 0;
1047 init_completion(&rtlpriv->firmware_loading_complete);
1048 SET_IEEE80211_DEV(hw, &intf->dev);
1049 udev = interface_to_usbdev(intf);
1050 usb_get_dev(udev);
1051 usb_priv = rtl_usbpriv(hw);
1052 memset(usb_priv, 0, sizeof(*usb_priv));
1053 usb_priv->dev.intf = intf;
1054 usb_priv->dev.udev = udev;
1055 usb_set_intfdata(intf, hw);
1056
1057 rtlpriv->rtlhal.interface = INTF_USB;
1058 rtlpriv->cfg = rtl_hal_cfg;
1059 rtlpriv->intf_ops = &rtl_usb_ops;
1060
1061 _rtl_usb_io_handler_init(&udev->dev, hw);
1062 rtlpriv->cfg->ops->read_chip_version(hw);
1063
1064 rtlpriv->cfg->ops->read_eeprom_info(hw);
1065 err = _rtl_usb_init(hw);
1066 if (err)
1067 goto error_out2;
1068 rtl_usb_init_sw(hw);
1069
1070 err = rtl_init_core(hw);
1071 if (err) {
1072 pr_err("Can't allocate sw for mac80211\n");
1073 goto error_out2;
1074 }
1075 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1076 pr_err("Can't init_sw_vars\n");
1077 goto error_out;
1078 }
1079 rtlpriv->cfg->ops->init_sw_leds(hw);
1080
1081 err = ieee80211_register_hw(hw);
1082 if (err) {
1083 pr_err("Can't register mac80211 hw.\n");
1084 err = -ENODEV;
1085 goto error_out;
1086 }
1087 rtlpriv->mac80211.mac80211_registered = 1;
1088
1089 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1090 return 0;
1091
1092error_out:
1093 rtl_deinit_core(hw);
1094error_out2:
1095 _rtl_usb_io_handler_release(hw);
1096 usb_put_dev(udev);
1097 complete(&rtlpriv->firmware_loading_complete);
1098 return -ENODEV;
1099}
1100EXPORT_SYMBOL(rtl_usb_probe);
1101
1102void rtl_usb_disconnect(struct usb_interface *intf)
1103{
1104 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1105 struct rtl_priv *rtlpriv = rtl_priv(hw);
1106 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1107 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1108
1109 if (unlikely(!rtlpriv))
1110 return;
1111
1112 wait_for_completion(&rtlpriv->firmware_loading_complete);
1113 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1114
1115 if (rtlmac->mac80211_registered == 1) {
1116 ieee80211_unregister_hw(hw);
1117 rtlmac->mac80211_registered = 0;
1118 } else {
1119 rtl_deinit_deferred_work(hw, false);
1120 rtlpriv->intf_ops->adapter_stop(hw);
1121 }
1122
1123
1124 rtl_usb_deinit(hw);
1125 rtl_deinit_core(hw);
1126 kfree(rtlpriv->usb_data);
1127 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1128 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1129 _rtl_usb_io_handler_release(hw);
1130 usb_put_dev(rtlusb->udev);
1131 usb_set_intfdata(intf, NULL);
1132 ieee80211_free_hw(hw);
1133}
1134EXPORT_SYMBOL(rtl_usb_disconnect);
1135
1136int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1137{
1138 return 0;
1139}
1140EXPORT_SYMBOL(rtl_usb_suspend);
1141
1142int rtl_usb_resume(struct usb_interface *pusb_intf)
1143{
1144 return 0;
1145}
1146EXPORT_SYMBOL(rtl_usb_resume);
1147