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24#include "wifi.h"
25#include "core.h"
26#include "usb.h"
27#include "base.h"
28#include "ps.h"
29#include "rtl8192c/fw_common.h"
30#include <linux/export.h>
31#include <linux/module.h>
32
33MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
34MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
35MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
36MODULE_LICENSE("GPL");
37MODULE_DESCRIPTION("USB basic driver for rtlwifi");
38
39#define REALTEK_USB_VENQT_READ 0xC0
40#define REALTEK_USB_VENQT_WRITE 0x40
41#define REALTEK_USB_VENQT_CMD_REQ 0x05
42#define REALTEK_USB_VENQT_CMD_IDX 0x00
43
44#define MAX_USBCTRL_VENDORREQ_TIMES 10
45
46static void usbctrl_async_callback(struct urb *urb)
47{
48 if (urb) {
49
50 kfree(urb->setup_packet);
51
52 kfree(urb->transfer_buffer);
53 }
54}
55
56static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
57 u16 value, u16 index, void *pdata,
58 u16 len)
59{
60 int rc;
61 unsigned int pipe;
62 u8 reqtype;
63 struct usb_ctrlrequest *dr;
64 struct urb *urb;
65 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
66 u8 *databuf;
67
68 if (WARN_ON_ONCE(len > databuf_maxlen))
69 len = databuf_maxlen;
70
71 pipe = usb_sndctrlpipe(udev, 0);
72 reqtype = REALTEK_USB_VENQT_WRITE;
73
74 dr = kzalloc(sizeof(*dr), GFP_ATOMIC);
75 if (!dr)
76 return -ENOMEM;
77
78 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC);
79 if (!databuf) {
80 kfree(dr);
81 return -ENOMEM;
82 }
83
84 urb = usb_alloc_urb(0, GFP_ATOMIC);
85 if (!urb) {
86 kfree(databuf);
87 kfree(dr);
88 return -ENOMEM;
89 }
90
91 dr->bRequestType = reqtype;
92 dr->bRequest = request;
93 dr->wValue = cpu_to_le16(value);
94 dr->wIndex = cpu_to_le16(index);
95 dr->wLength = cpu_to_le16(len);
96
97 memcpy(databuf, pdata, len);
98 usb_fill_control_urb(urb, udev, pipe,
99 (unsigned char *)dr, databuf, len,
100 usbctrl_async_callback, NULL);
101 rc = usb_submit_urb(urb, GFP_ATOMIC);
102 if (rc < 0) {
103 kfree(databuf);
104 kfree(dr);
105 }
106 usb_free_urb(urb);
107 return rc;
108}
109
110static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
111 u16 value, u16 index, void *pdata,
112 u16 len)
113{
114 unsigned int pipe;
115 int status;
116 u8 reqtype;
117 int vendorreq_times = 0;
118 static int count;
119
120 pipe = usb_rcvctrlpipe(udev, 0);
121 reqtype = REALTEK_USB_VENQT_READ;
122
123 do {
124 status = usb_control_msg(udev, pipe, request, reqtype, value,
125 index, pdata, len, 1000);
126 if (status < 0) {
127
128 if ((value >= FW_8192C_START_ADDRESS &&
129 value <= FW_8192C_END_ADDRESS))
130 break;
131 } else {
132 break;
133 }
134 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
135
136 if (status < 0 && count++ < 4)
137 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
138 value, status, *(u32 *)pdata);
139 return status;
140}
141
142static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
143{
144 struct device *dev = rtlpriv->io.dev;
145 struct usb_device *udev = to_usb_device(dev);
146 u8 request;
147 u16 wvalue;
148 u16 index;
149 __le32 *data;
150 unsigned long flags;
151
152 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
153 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
154 rtlpriv->usb_data_index = 0;
155 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
156 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
157 request = REALTEK_USB_VENQT_CMD_REQ;
158 index = REALTEK_USB_VENQT_CMD_IDX;
159
160 wvalue = (u16)addr;
161 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
162 return le32_to_cpu(*data);
163}
164
165static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
166{
167 return (u8)_usb_read_sync(rtlpriv, addr, 1);
168}
169
170static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
171{
172 return (u16)_usb_read_sync(rtlpriv, addr, 2);
173}
174
175static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
176{
177 return _usb_read_sync(rtlpriv, addr, 4);
178}
179
180static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
181 u16 len)
182{
183 u8 request;
184 u16 wvalue;
185 u16 index;
186 __le32 data;
187
188 request = REALTEK_USB_VENQT_CMD_REQ;
189 index = REALTEK_USB_VENQT_CMD_IDX;
190 wvalue = (u16)(addr&0x0000ffff);
191 data = cpu_to_le32(val);
192 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
193 len);
194}
195
196static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
197{
198 struct device *dev = rtlpriv->io.dev;
199
200 _usb_write_async(to_usb_device(dev), addr, val, 1);
201}
202
203static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
204{
205 struct device *dev = rtlpriv->io.dev;
206
207 _usb_write_async(to_usb_device(dev), addr, val, 2);
208}
209
210static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
211{
212 struct device *dev = rtlpriv->io.dev;
213
214 _usb_write_async(to_usb_device(dev), addr, val, 4);
215}
216
217static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
218 u16 len)
219{
220 struct device *dev = rtlpriv->io.dev;
221 struct usb_device *udev = to_usb_device(dev);
222 u8 request = REALTEK_USB_VENQT_CMD_REQ;
223 u8 reqtype = REALTEK_USB_VENQT_WRITE;
224 u16 wvalue;
225 u16 index = REALTEK_USB_VENQT_CMD_IDX;
226 int pipe = usb_sndctrlpipe(udev, 0);
227 u8 *buffer;
228
229 wvalue = (u16)(addr & 0x0000ffff);
230 buffer = kmemdup(data, len, GFP_ATOMIC);
231 if (!buffer)
232 return;
233 usb_control_msg(udev, pipe, request, reqtype, wvalue,
234 index, buffer, len, 50);
235
236 kfree(buffer);
237}
238
239static void _rtl_usb_io_handler_init(struct device *dev,
240 struct ieee80211_hw *hw)
241{
242 struct rtl_priv *rtlpriv = rtl_priv(hw);
243
244 rtlpriv->io.dev = dev;
245 mutex_init(&rtlpriv->io.bb_mutex);
246 rtlpriv->io.write8_async = _usb_write8_async;
247 rtlpriv->io.write16_async = _usb_write16_async;
248 rtlpriv->io.write32_async = _usb_write32_async;
249 rtlpriv->io.read8_sync = _usb_read8_sync;
250 rtlpriv->io.read16_sync = _usb_read16_sync;
251 rtlpriv->io.read32_sync = _usb_read32_sync;
252 rtlpriv->io.writeN_sync = _usb_writeN_sync;
253}
254
255static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
256{
257 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
258
259 mutex_destroy(&rtlpriv->io.bb_mutex);
260}
261
262
263
264
265
266static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
267 struct sk_buff_head *list)
268{
269 return skb_dequeue(list);
270}
271
272#define IS_HIGH_SPEED_USB(udev) \
273 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
274
275static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
276{
277 u32 i;
278 struct rtl_priv *rtlpriv = rtl_priv(hw);
279 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
280
281 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
282 ? USB_HIGH_SPEED_BULK_SIZE
283 : USB_FULL_SPEED_BULK_SIZE;
284
285 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
286 rtlusb->max_bulk_out_size);
287
288 for (i = 0; i < __RTL_TXQ_NUM; i++) {
289 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
290 if (!ep_num) {
291 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
292 "Invalid endpoint map setting!\n");
293 return -EINVAL;
294 }
295 }
296
297 rtlusb->usb_tx_post_hdl =
298 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
299 rtlusb->usb_tx_cleanup =
300 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
301 rtlusb->usb_tx_aggregate_hdl =
302 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
303 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
304 : &_none_usb_tx_aggregate_hdl;
305
306 init_usb_anchor(&rtlusb->tx_submitted);
307 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
308 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
309 init_usb_anchor(&rtlusb->tx_pending[i]);
310 }
311 return 0;
312}
313
314static void _rtl_rx_work(unsigned long param);
315
316static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
317{
318 struct rtl_priv *rtlpriv = rtl_priv(hw);
319 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
320 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
321
322 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
323 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
324 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
325 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
326 rtlusb->usb_rx_segregate_hdl =
327 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
328
329 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
330 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
331 init_usb_anchor(&rtlusb->rx_submitted);
332 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
333
334 skb_queue_head_init(&rtlusb->rx_queue);
335 rtlusb->rx_work_tasklet.func = _rtl_rx_work;
336 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
337
338 return 0;
339}
340
341static int _rtl_usb_init(struct ieee80211_hw *hw)
342{
343 struct rtl_priv *rtlpriv = rtl_priv(hw);
344 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
345 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
346 int err;
347 u8 epidx;
348 struct usb_interface *usb_intf = rtlusb->intf;
349 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
350
351 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
352 for (epidx = 0; epidx < epnums; epidx++) {
353 struct usb_endpoint_descriptor *pep_desc;
354 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
355
356 if (usb_endpoint_dir_in(pep_desc))
357 rtlusb->in_ep_nums++;
358 else if (usb_endpoint_dir_out(pep_desc))
359 rtlusb->out_ep_nums++;
360
361 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
362 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
363 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
364 pep_desc->bInterval);
365 }
366 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
367 pr_err("Too few input end points found\n");
368 return -EINVAL;
369 }
370 if (rtlusb->out_ep_nums == 0) {
371 pr_err("No output end points found\n");
372 return -EINVAL;
373 }
374
375 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
376 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
377 _rtl_usb_init_tx(hw);
378 _rtl_usb_init_rx(hw);
379 return err;
380}
381
382static void rtl_usb_init_sw(struct ieee80211_hw *hw)
383{
384 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
385 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
386 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
387 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
388
389 rtlhal->hw = hw;
390 ppsc->inactiveps = false;
391 ppsc->leisure_ps = false;
392 ppsc->fwctrl_lps = false;
393 ppsc->reg_fwctrl_lps = 3;
394 ppsc->reg_max_lps_awakeintvl = 5;
395 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
396
397
398 mac->beacon_interval = 100;
399
400
401 mac->min_space_cfg = 0;
402 mac->max_mss_density = 0;
403
404
405 mac->current_ampdu_density = 7;
406 mac->current_ampdu_factor = 3;
407
408
409 rtlusb->acm_method = EACMWAY2_SW;
410
411
412
413 rtlusb->irq_mask[0] = 0xFFFFFFFF;
414
415 rtlusb->irq_mask[1] = 0xFFFFFFFF;
416 rtlusb->disableHWSM = true;
417}
418
419static void _rtl_rx_completed(struct urb *urb);
420
421static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
422 struct urb *urb, gfp_t gfp_mask)
423{
424 void *buf;
425
426 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
427 &urb->transfer_dma);
428 if (!buf) {
429 pr_err("Failed to usb_alloc_coherent!!\n");
430 return -ENOMEM;
431 }
432
433 usb_fill_bulk_urb(urb, rtlusb->udev,
434 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
435 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
436 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
437
438 return 0;
439}
440
441static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
442 struct sk_buff *skb)
443{
444 struct rtl_priv *rtlpriv = rtl_priv(hw);
445 u8 *rxdesc = skb->data;
446 struct ieee80211_hdr *hdr;
447 bool unicast = false;
448 __le16 fc;
449 struct ieee80211_rx_status rx_status = {0};
450 struct rtl_stats stats = {
451 .signal = 0,
452 .rate = 0,
453 };
454
455 skb_pull(skb, RTL_RX_DESC_SIZE);
456 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
457 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
458 hdr = (struct ieee80211_hdr *)(skb->data);
459 fc = hdr->frame_control;
460 if (!stats.crc) {
461 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
462
463 if (is_broadcast_ether_addr(hdr->addr1)) {
464 ;
465 } else if (is_multicast_ether_addr(hdr->addr1)) {
466
467 } else {
468 unicast = true;
469 rtlpriv->stats.rxbytesunicast += skb->len;
470 }
471
472 if (ieee80211_is_data(fc)) {
473 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
474
475 if (unicast)
476 rtlpriv->link_info.num_rx_inperiod++;
477 }
478
479 rtl_beacon_statistic(hw, skb);
480 }
481}
482
483static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
484 struct sk_buff *skb)
485{
486 struct rtl_priv *rtlpriv = rtl_priv(hw);
487 u8 *rxdesc = skb->data;
488 struct ieee80211_hdr *hdr;
489 bool unicast = false;
490 __le16 fc;
491 struct ieee80211_rx_status rx_status = {0};
492 struct rtl_stats stats = {
493 .signal = 0,
494 .rate = 0,
495 };
496
497 skb_pull(skb, RTL_RX_DESC_SIZE);
498 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
499 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
500 hdr = (struct ieee80211_hdr *)(skb->data);
501 fc = hdr->frame_control;
502 if (!stats.crc) {
503 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
504
505 if (is_broadcast_ether_addr(hdr->addr1)) {
506 ;
507 } else if (is_multicast_ether_addr(hdr->addr1)) {
508
509 } else {
510 unicast = true;
511 rtlpriv->stats.rxbytesunicast += skb->len;
512 }
513
514 if (ieee80211_is_data(fc)) {
515 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
516
517 if (unicast)
518 rtlpriv->link_info.num_rx_inperiod++;
519 }
520
521
522 rtl_beacon_statistic(hw, skb);
523
524 if (likely(rtl_action_proc(hw, skb, false)))
525 ieee80211_rx(hw, skb);
526 else
527 dev_kfree_skb_any(skb);
528 } else {
529 dev_kfree_skb_any(skb);
530 }
531}
532
533static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
534{
535 struct sk_buff *_skb;
536 struct sk_buff_head rx_queue;
537 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
538
539 skb_queue_head_init(&rx_queue);
540 if (rtlusb->usb_rx_segregate_hdl)
541 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
542 WARN_ON(skb_queue_empty(&rx_queue));
543 while (!skb_queue_empty(&rx_queue)) {
544 _skb = skb_dequeue(&rx_queue);
545 _rtl_usb_rx_process_agg(hw, _skb);
546 ieee80211_rx(hw, _skb);
547 }
548}
549
550#define __RX_SKB_MAX_QUEUED 64
551
552static void _rtl_rx_work(unsigned long param)
553{
554 struct rtl_usb *rtlusb = (struct rtl_usb *)param;
555 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
556 struct sk_buff *skb;
557
558 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
559 if (unlikely(IS_USB_STOP(rtlusb))) {
560 dev_kfree_skb_any(skb);
561 continue;
562 }
563
564 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
565 _rtl_usb_rx_process_noagg(hw, skb);
566 } else {
567
568 _rtl_rx_pre_process(hw, skb);
569 pr_err("rx agg not supported\n");
570 }
571 }
572}
573
574static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
575 unsigned int len)
576{
577#if NET_IP_ALIGN != 0
578 unsigned int padding = 0;
579#endif
580
581
582 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
583 return 0;
584
585#if NET_IP_ALIGN != 0
586
587
588
589 if (ieee80211_is_data_qos(hdr->frame_control)) {
590 u8 *qc = ieee80211_get_qos_ctl(hdr);
591
592 padding ^= NET_IP_ALIGN;
593
594
595
596
597 if ((unsigned long)qc - (unsigned long)hdr < len &&
598 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
599 padding ^= NET_IP_ALIGN;
600 }
601
602 if (ieee80211_has_a4(hdr->frame_control))
603 padding ^= NET_IP_ALIGN;
604
605 return padding;
606#endif
607}
608
609#define __RADIO_TAP_SIZE_RSV 32
610
611static void _rtl_rx_completed(struct urb *_urb)
612{
613 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
614 int err = 0;
615
616 if (unlikely(IS_USB_STOP(rtlusb)))
617 goto free;
618
619 if (likely(0 == _urb->status)) {
620 unsigned int padding;
621 struct sk_buff *skb;
622 unsigned int qlen;
623 unsigned int size = _urb->actual_length;
624 struct ieee80211_hdr *hdr;
625
626 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
627 pr_err("Too short packet from bulk IN! (len: %d)\n",
628 size);
629 goto resubmit;
630 }
631
632 qlen = skb_queue_len(&rtlusb->rx_queue);
633 if (qlen >= __RX_SKB_MAX_QUEUED) {
634 pr_err("Pending RX skbuff queue full! (qlen: %d)\n",
635 qlen);
636 goto resubmit;
637 }
638
639 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
640 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
641
642 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
643 if (!skb) {
644 pr_err("Can't allocate skb for bulk IN!\n");
645 goto resubmit;
646 }
647
648 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
649
650
651 skb_reserve(skb, padding);
652
653
654 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
655
656 skb_put_data(skb, _urb->transfer_buffer, size);
657
658 skb_queue_tail(&rtlusb->rx_queue, skb);
659 tasklet_schedule(&rtlusb->rx_work_tasklet);
660
661 goto resubmit;
662 }
663
664 switch (_urb->status) {
665
666 case -ENOENT:
667 case -ECONNRESET:
668 case -ENODEV:
669 case -ESHUTDOWN:
670 goto free;
671 default:
672 break;
673 }
674
675resubmit:
676 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
677 err = usb_submit_urb(_urb, GFP_ATOMIC);
678 if (unlikely(err)) {
679 usb_unanchor_urb(_urb);
680 goto free;
681 }
682 return;
683
684free:
685
686
687
688 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
689}
690
691#undef __RADIO_TAP_SIZE_RSV
692
693static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
694{
695 struct rtl_priv *rtlpriv = rtl_priv(hw);
696 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
697 struct urb *urb;
698
699 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
700
701 tasklet_kill(&rtlusb->rx_work_tasklet);
702 cancel_work_sync(&rtlpriv->works.lps_change_work);
703
704 flush_workqueue(rtlpriv->works.rtl_wq);
705 destroy_workqueue(rtlpriv->works.rtl_wq);
706
707 skb_queue_purge(&rtlusb->rx_queue);
708
709 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
710 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
711 urb->transfer_buffer, urb->transfer_dma);
712 usb_free_urb(urb);
713 }
714}
715
716static int _rtl_usb_receive(struct ieee80211_hw *hw)
717{
718 struct urb *urb;
719 int err;
720 int i;
721 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
722
723 WARN_ON(0 == rtlusb->rx_urb_num);
724
725 WARN_ON(rtlusb->rx_max_size < 1600);
726
727 for (i = 0; i < rtlusb->rx_urb_num; i++) {
728 err = -ENOMEM;
729 urb = usb_alloc_urb(0, GFP_KERNEL);
730 if (!urb)
731 goto err_out;
732
733 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
734 if (err < 0) {
735 pr_err("Failed to prep_rx_urb!!\n");
736 usb_free_urb(urb);
737 goto err_out;
738 }
739
740 usb_anchor_urb(urb, &rtlusb->rx_submitted);
741 err = usb_submit_urb(urb, GFP_KERNEL);
742 if (err)
743 goto err_out;
744 usb_free_urb(urb);
745 }
746 return 0;
747
748err_out:
749 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
750 _rtl_usb_cleanup_rx(hw);
751 return err;
752}
753
754static int rtl_usb_start(struct ieee80211_hw *hw)
755{
756 int err;
757 struct rtl_priv *rtlpriv = rtl_priv(hw);
758 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
759 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
760
761 err = rtlpriv->cfg->ops->hw_init(hw);
762 if (!err) {
763 rtl_init_rx_config(hw);
764
765
766 SET_USB_START(rtlusb);
767
768 set_hal_start(rtlhal);
769
770
771 err = _rtl_usb_receive(hw);
772 }
773
774 return err;
775}
776
777
778
779
780
781
782static void rtl_usb_cleanup(struct ieee80211_hw *hw)
783{
784 u32 i;
785 struct sk_buff *_skb;
786 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
787 struct ieee80211_tx_info *txinfo;
788
789
790 _rtl_usb_cleanup_rx(hw);
791
792
793 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
794 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
795 rtlusb->usb_tx_cleanup(hw, _skb);
796 txinfo = IEEE80211_SKB_CB(_skb);
797 ieee80211_tx_info_clear_status(txinfo);
798 txinfo->flags |= IEEE80211_TX_STAT_ACK;
799 ieee80211_tx_status_irqsafe(hw, _skb);
800 }
801 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
802 }
803 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
804}
805
806
807
808
809
810
811static void rtl_usb_deinit(struct ieee80211_hw *hw)
812{
813 rtl_usb_cleanup(hw);
814}
815
816static void rtl_usb_stop(struct ieee80211_hw *hw)
817{
818 struct rtl_priv *rtlpriv = rtl_priv(hw);
819 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
820 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
821 struct urb *urb;
822
823
824 set_hal_stop(rtlhal);
825 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
826
827 SET_USB_STOP(rtlusb);
828
829
830 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
831
832 tasklet_kill(&rtlusb->rx_work_tasklet);
833 cancel_work_sync(&rtlpriv->works.lps_change_work);
834
835 flush_workqueue(rtlpriv->works.rtl_wq);
836
837 skb_queue_purge(&rtlusb->rx_queue);
838
839 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
840 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
841 urb->transfer_buffer, urb->transfer_dma);
842 usb_free_urb(urb);
843 }
844
845 rtlpriv->cfg->ops->hw_disable(hw);
846}
847
848static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
849{
850 int err;
851 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
852
853 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
854 err = usb_submit_urb(_urb, GFP_ATOMIC);
855 if (err < 0) {
856 struct sk_buff *skb;
857
858 pr_err("Failed to submit urb\n");
859 usb_unanchor_urb(_urb);
860 skb = (struct sk_buff *)_urb->context;
861 kfree_skb(skb);
862 }
863 usb_free_urb(_urb);
864}
865
866static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
867 struct sk_buff *skb)
868{
869 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
870 struct ieee80211_tx_info *txinfo;
871
872 rtlusb->usb_tx_post_hdl(hw, urb, skb);
873 skb_pull(skb, RTL_TX_HEADER_SIZE);
874 txinfo = IEEE80211_SKB_CB(skb);
875 ieee80211_tx_info_clear_status(txinfo);
876 txinfo->flags |= IEEE80211_TX_STAT_ACK;
877
878 if (urb->status) {
879 pr_err("Urb has error status 0x%X\n", urb->status);
880 goto out;
881 }
882
883out:
884 ieee80211_tx_status_irqsafe(hw, skb);
885 return urb->status;
886}
887
888static void _rtl_tx_complete(struct urb *urb)
889{
890 struct sk_buff *skb = (struct sk_buff *)urb->context;
891 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
892 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
893 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
894 int err;
895
896 if (unlikely(IS_USB_STOP(rtlusb)))
897 return;
898 err = _usb_tx_post(hw, urb, skb);
899 if (err) {
900
901 return;
902 }
903}
904
905static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
906 struct sk_buff *skb, u32 ep_num)
907{
908 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
909 struct urb *_urb;
910
911 WARN_ON(NULL == skb);
912 _urb = usb_alloc_urb(0, GFP_ATOMIC);
913 if (!_urb) {
914 kfree_skb(skb);
915 return NULL;
916 }
917 _rtl_install_trx_info(rtlusb, skb, ep_num);
918 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
919 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
920 _urb->transfer_flags |= URB_ZERO_PACKET;
921 return _urb;
922}
923
924static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
925 enum rtl_txq qnum)
926{
927 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
928 u32 ep_num;
929 struct urb *_urb = NULL;
930 struct sk_buff *_skb = NULL;
931
932 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
933 if (unlikely(IS_USB_STOP(rtlusb))) {
934 pr_err("USB device is stopping...\n");
935 kfree_skb(skb);
936 return;
937 }
938 ep_num = rtlusb->ep_map.ep_mapping[qnum];
939 _skb = skb;
940 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
941 if (unlikely(!_urb)) {
942 pr_err("Can't allocate urb. Drop skb!\n");
943 kfree_skb(skb);
944 return;
945 }
946 _rtl_submit_tx_urb(hw, _urb);
947}
948
949static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
950 struct ieee80211_sta *sta,
951 struct sk_buff *skb,
952 u16 hw_queue)
953{
954 struct rtl_priv *rtlpriv = rtl_priv(hw);
955 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
956 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
957 struct rtl_tx_desc *pdesc = NULL;
958 struct rtl_tcb_desc tcb_desc;
959 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
960 __le16 fc = hdr->frame_control;
961 u8 *pda_addr = hdr->addr1;
962
963 u8 *qc = NULL;
964 u8 tid = 0;
965 u16 seq_number = 0;
966
967 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
968 if (ieee80211_is_auth(fc)) {
969 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
970 rtl_ips_nic_on(hw);
971 }
972
973 if (rtlpriv->psc.sw_ps_enabled) {
974 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
975 !ieee80211_has_pm(fc))
976 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
977 }
978
979 rtl_action_proc(hw, skb, true);
980 if (is_multicast_ether_addr(pda_addr))
981 rtlpriv->stats.txbytesmulticast += skb->len;
982 else if (is_broadcast_ether_addr(pda_addr))
983 rtlpriv->stats.txbytesbroadcast += skb->len;
984 else
985 rtlpriv->stats.txbytesunicast += skb->len;
986 if (ieee80211_is_data_qos(fc)) {
987 qc = ieee80211_get_qos_ctl(hdr);
988 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
989 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
990 IEEE80211_SCTL_SEQ) >> 4;
991 seq_number += 1;
992 seq_number <<= 4;
993 }
994 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
995 hw_queue, &tcb_desc);
996 if (!ieee80211_has_morefrags(hdr->frame_control)) {
997 if (qc)
998 mac->tids[tid].seq_number = seq_number;
999 }
1000 if (ieee80211_is_data(fc))
1001 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1002}
1003
1004static int rtl_usb_tx(struct ieee80211_hw *hw,
1005 struct ieee80211_sta *sta,
1006 struct sk_buff *skb,
1007 struct rtl_tcb_desc *dummy)
1008{
1009 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1010 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1011 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1012 __le16 fc = hdr->frame_control;
1013 u16 hw_queue;
1014
1015 if (unlikely(is_hal_stop(rtlhal)))
1016 goto err_free;
1017 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1018 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1019 _rtl_usb_transmit(hw, skb, hw_queue);
1020 return NETDEV_TX_OK;
1021
1022err_free:
1023 dev_kfree_skb_any(skb);
1024 return NETDEV_TX_OK;
1025}
1026
1027static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1028 struct ieee80211_sta *sta,
1029 struct sk_buff *skb)
1030{
1031 return false;
1032}
1033
1034static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1035{
1036 struct rtl_works *rtlworks =
1037 container_of(work, struct rtl_works, fill_h2c_cmd);
1038 struct ieee80211_hw *hw = rtlworks->hw;
1039 struct rtl_priv *rtlpriv = rtl_priv(hw);
1040
1041 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1042}
1043
1044static const struct rtl_intf_ops rtl_usb_ops = {
1045 .adapter_start = rtl_usb_start,
1046 .adapter_stop = rtl_usb_stop,
1047 .adapter_tx = rtl_usb_tx,
1048 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1049};
1050
1051int rtl_usb_probe(struct usb_interface *intf,
1052 const struct usb_device_id *id,
1053 struct rtl_hal_cfg *rtl_hal_cfg)
1054{
1055 int err;
1056 struct ieee80211_hw *hw = NULL;
1057 struct rtl_priv *rtlpriv = NULL;
1058 struct usb_device *udev;
1059 struct rtl_usb_priv *usb_priv;
1060
1061 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1062 sizeof(struct rtl_usb_priv), &rtl_ops);
1063 if (!hw) {
1064 WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n");
1065 return -ENOMEM;
1066 }
1067 rtlpriv = hw->priv;
1068 rtlpriv->hw = hw;
1069 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1070 GFP_KERNEL);
1071 if (!rtlpriv->usb_data)
1072 return -ENOMEM;
1073
1074
1075 spin_lock_init(&rtlpriv->locks.usb_lock);
1076 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1077 rtl_fill_h2c_cmd_work_callback);
1078 INIT_WORK(&rtlpriv->works.lps_change_work,
1079 rtl_lps_change_work_callback);
1080
1081 rtlpriv->usb_data_index = 0;
1082 init_completion(&rtlpriv->firmware_loading_complete);
1083 SET_IEEE80211_DEV(hw, &intf->dev);
1084 udev = interface_to_usbdev(intf);
1085 usb_get_dev(udev);
1086 usb_priv = rtl_usbpriv(hw);
1087 memset(usb_priv, 0, sizeof(*usb_priv));
1088 usb_priv->dev.intf = intf;
1089 usb_priv->dev.udev = udev;
1090 usb_set_intfdata(intf, hw);
1091
1092 rtlpriv->rtlhal.interface = INTF_USB;
1093 rtlpriv->cfg = rtl_hal_cfg;
1094 rtlpriv->intf_ops = &rtl_usb_ops;
1095
1096 _rtl_usb_io_handler_init(&udev->dev, hw);
1097 rtlpriv->cfg->ops->read_chip_version(hw);
1098
1099 rtlpriv->cfg->ops->read_eeprom_info(hw);
1100 err = _rtl_usb_init(hw);
1101 if (err)
1102 goto error_out;
1103 rtl_usb_init_sw(hw);
1104
1105 err = rtl_init_core(hw);
1106 if (err) {
1107 pr_err("Can't allocate sw for mac80211\n");
1108 goto error_out;
1109 }
1110 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1111 pr_err("Can't init_sw_vars\n");
1112 goto error_out;
1113 }
1114 rtlpriv->cfg->ops->init_sw_leds(hw);
1115
1116 err = ieee80211_register_hw(hw);
1117 if (err) {
1118 pr_err("Can't register mac80211 hw.\n");
1119 err = -ENODEV;
1120 goto error_out;
1121 }
1122 rtlpriv->mac80211.mac80211_registered = 1;
1123
1124 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1125 return 0;
1126
1127error_out:
1128 rtl_deinit_core(hw);
1129 _rtl_usb_io_handler_release(hw);
1130 usb_put_dev(udev);
1131 complete(&rtlpriv->firmware_loading_complete);
1132 return -ENODEV;
1133}
1134EXPORT_SYMBOL(rtl_usb_probe);
1135
1136void rtl_usb_disconnect(struct usb_interface *intf)
1137{
1138 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1139 struct rtl_priv *rtlpriv = rtl_priv(hw);
1140 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1141 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1142
1143 if (unlikely(!rtlpriv))
1144 return;
1145
1146 wait_for_completion(&rtlpriv->firmware_loading_complete);
1147 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1148
1149 if (rtlmac->mac80211_registered == 1) {
1150 ieee80211_unregister_hw(hw);
1151 rtlmac->mac80211_registered = 0;
1152 } else {
1153 rtl_deinit_deferred_work(hw);
1154 rtlpriv->intf_ops->adapter_stop(hw);
1155 }
1156
1157
1158 rtl_usb_deinit(hw);
1159 rtl_deinit_core(hw);
1160 kfree(rtlpriv->usb_data);
1161 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1162 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1163 _rtl_usb_io_handler_release(hw);
1164 usb_put_dev(rtlusb->udev);
1165 usb_set_intfdata(intf, NULL);
1166 ieee80211_free_hw(hw);
1167}
1168EXPORT_SYMBOL(rtl_usb_disconnect);
1169
1170int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1171{
1172 return 0;
1173}
1174EXPORT_SYMBOL(rtl_usb_suspend);
1175
1176int rtl_usb_resume(struct usb_interface *pusb_intf)
1177{
1178 return 0;
1179}
1180EXPORT_SYMBOL(rtl_usb_resume);
1181
