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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2009-2012 Realtek Corporation.*/
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 /* free dr */
30 kfree(urb->setup_packet);
31 /* free databuf */
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); /* write_out */
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 /* data are already in little-endian order */
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); /* read_in */
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 /* firmware download is checksumed, don't retry */
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; /* n/a */
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 int ret;
168
169 request = REALTEK_USB_VENQT_CMD_REQ;
170 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
171 wvalue = (u16)(addr&0x0000ffff);
172 data = cpu_to_le32(val);
173
174 ret = _usbctrl_vendorreq_async_write(udev, request, wvalue,
175 index, &data, len);
176 if (ret < 0)
177 dev_err(&udev->dev, "error %d writing at 0x%x\n", ret, addr);
178}
179
180static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
181{
182 struct device *dev = rtlpriv->io.dev;
183
184 _usb_write_async(to_usb_device(dev), addr, val, 1);
185}
186
187static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
188{
189 struct device *dev = rtlpriv->io.dev;
190
191 _usb_write_async(to_usb_device(dev), addr, val, 2);
192}
193
194static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
195{
196 struct device *dev = rtlpriv->io.dev;
197
198 _usb_write_async(to_usb_device(dev), addr, val, 4);
199}
200
201static void _rtl_usb_io_handler_init(struct device *dev,
202 struct ieee80211_hw *hw)
203{
204 struct rtl_priv *rtlpriv = rtl_priv(hw);
205
206 rtlpriv->io.dev = dev;
207 mutex_init(&rtlpriv->io.bb_mutex);
208 rtlpriv->io.write8_async = _usb_write8_async;
209 rtlpriv->io.write16_async = _usb_write16_async;
210 rtlpriv->io.write32_async = _usb_write32_async;
211 rtlpriv->io.read8_sync = _usb_read8_sync;
212 rtlpriv->io.read16_sync = _usb_read16_sync;
213 rtlpriv->io.read32_sync = _usb_read32_sync;
214}
215
216static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
217{
218 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
219
220 mutex_destroy(&rtlpriv->io.bb_mutex);
221}
222
223/* Default aggregation handler. Do nothing and just return the oldest skb. */
224static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
225 struct sk_buff_head *list)
226{
227 return skb_dequeue(list);
228}
229
230#define IS_HIGH_SPEED_USB(udev) \
231 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
232
233static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
234{
235 u32 i;
236 struct rtl_priv *rtlpriv = rtl_priv(hw);
237 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
238
239 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
240 ? USB_HIGH_SPEED_BULK_SIZE
241 : USB_FULL_SPEED_BULK_SIZE;
242
243 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
244 rtlusb->max_bulk_out_size);
245
246 for (i = 0; i < __RTL_TXQ_NUM; i++) {
247 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
248
249 if (!ep_num) {
250 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
251 "Invalid endpoint map setting!\n");
252 return -EINVAL;
253 }
254 }
255
256 rtlusb->usb_tx_post_hdl =
257 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
258 rtlusb->usb_tx_cleanup =
259 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
260 rtlusb->usb_tx_aggregate_hdl =
261 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
262 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
263 : &_none_usb_tx_aggregate_hdl;
264
265 init_usb_anchor(&rtlusb->tx_submitted);
266 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
267 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
268 init_usb_anchor(&rtlusb->tx_pending[i]);
269 }
270 return 0;
271}
272
273static void _rtl_rx_work(struct tasklet_struct *t);
274
275static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
276{
277 struct rtl_priv *rtlpriv = rtl_priv(hw);
278 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
279 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
280
281 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
282 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
283 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
284 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
285 rtlusb->usb_rx_segregate_hdl =
286 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
287
288 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
289 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
290 init_usb_anchor(&rtlusb->rx_submitted);
291 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
292
293 skb_queue_head_init(&rtlusb->rx_queue);
294 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work);
295
296 return 0;
297}
298
299static int _rtl_usb_init(struct ieee80211_hw *hw)
300{
301 struct rtl_priv *rtlpriv = rtl_priv(hw);
302 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
303 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
304 int err;
305 u8 epidx;
306 struct usb_interface *usb_intf = rtlusb->intf;
307 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
308
309 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
310 for (epidx = 0; epidx < epnums; epidx++) {
311 struct usb_endpoint_descriptor *pep_desc;
312
313 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
314
315 if (usb_endpoint_dir_in(pep_desc))
316 rtlusb->in_ep_nums++;
317 else if (usb_endpoint_dir_out(pep_desc))
318 rtlusb->out_ep_nums++;
319
320 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
321 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
322 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
323 pep_desc->bInterval);
324 }
325 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
326 pr_err("Too few input end points found\n");
327 return -EINVAL;
328 }
329 if (rtlusb->out_ep_nums == 0) {
330 pr_err("No output end points found\n");
331 return -EINVAL;
332 }
333 /* usb endpoint mapping */
334 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
335 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
336 _rtl_usb_init_tx(hw);
337 _rtl_usb_init_rx(hw);
338 return err;
339}
340
341static void rtl_usb_init_sw(struct ieee80211_hw *hw)
342{
343 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
344 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
345 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
346 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
347
348 rtlhal->hw = hw;
349 ppsc->inactiveps = false;
350 ppsc->leisure_ps = false;
351 ppsc->fwctrl_lps = false;
352 ppsc->reg_fwctrl_lps = 3;
353 ppsc->reg_max_lps_awakeintvl = 5;
354 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
355
356 /* IBSS */
357 mac->beacon_interval = 100;
358
359 /* AMPDU */
360 mac->min_space_cfg = 0;
361 mac->max_mss_density = 0;
362
363 /* set sane AMPDU defaults */
364 mac->current_ampdu_density = 7;
365 mac->current_ampdu_factor = 3;
366
367 /* QOS */
368 rtlusb->acm_method = EACMWAY2_SW;
369
370 /* IRQ */
371 /* HIMR - turn all on */
372 rtlusb->irq_mask[0] = 0xFFFFFFFF;
373 /* HIMR_EX - turn all on */
374 rtlusb->irq_mask[1] = 0xFFFFFFFF;
375 rtlusb->disablehwsm = true;
376}
377
378static void _rtl_rx_completed(struct urb *urb);
379
380static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
381 struct urb *urb, gfp_t gfp_mask)
382{
383 void *buf;
384
385 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
386 &urb->transfer_dma);
387 if (!buf) {
388 pr_err("Failed to usb_alloc_coherent!!\n");
389 return -ENOMEM;
390 }
391
392 usb_fill_bulk_urb(urb, rtlusb->udev,
393 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
394 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
395 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
396
397 return 0;
398}
399
400static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
401 struct sk_buff *skb)
402{
403 struct rtl_priv *rtlpriv = rtl_priv(hw);
404 u8 *rxdesc = skb->data;
405 struct ieee80211_hdr *hdr;
406 bool unicast = false;
407 __le16 fc;
408 struct ieee80211_rx_status rx_status = {0};
409 struct rtl_stats stats = {
410 .signal = 0,
411 .rate = 0,
412 };
413
414 skb_pull(skb, RTL_RX_DESC_SIZE);
415 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
416 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
417 hdr = rtl_get_hdr(skb);
418 fc = hdr->frame_control;
419 if (!stats.crc) {
420 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
421
422 if (is_broadcast_ether_addr(hdr->addr1)) {
423 /*TODO*/;
424 } else if (is_multicast_ether_addr(hdr->addr1)) {
425 /*TODO*/
426 } else {
427 unicast = true;
428 rtlpriv->stats.rxbytesunicast += skb->len;
429 }
430
431 if (ieee80211_is_data(fc)) {
432 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
433
434 if (unicast)
435 rtlpriv->link_info.num_rx_inperiod++;
436 }
437 /* static bcn for roaming */
438 rtl_beacon_statistic(hw, skb);
439 }
440}
441
442static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
443 struct sk_buff *skb)
444{
445 struct rtl_priv *rtlpriv = rtl_priv(hw);
446 u8 *rxdesc = skb->data;
447 struct ieee80211_hdr *hdr;
448 bool unicast = false;
449 __le16 fc;
450 struct ieee80211_rx_status rx_status = {0};
451 struct rtl_stats stats = {
452 .signal = 0,
453 .rate = 0,
454 };
455
456 skb_pull(skb, RTL_RX_DESC_SIZE);
457 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
458 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
459 hdr = rtl_get_hdr(skb);
460 fc = hdr->frame_control;
461 if (!stats.crc) {
462 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
463
464 if (is_broadcast_ether_addr(hdr->addr1)) {
465 /*TODO*/;
466 } else if (is_multicast_ether_addr(hdr->addr1)) {
467 /*TODO*/
468 } else {
469 unicast = true;
470 rtlpriv->stats.rxbytesunicast += skb->len;
471 }
472
473 if (ieee80211_is_data(fc)) {
474 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
475
476 if (unicast)
477 rtlpriv->link_info.num_rx_inperiod++;
478 }
479
480 /* static bcn for roaming */
481 rtl_beacon_statistic(hw, skb);
482
483 if (likely(rtl_action_proc(hw, skb, false)))
484 ieee80211_rx(hw, skb);
485 else
486 dev_kfree_skb_any(skb);
487 } else {
488 dev_kfree_skb_any(skb);
489 }
490}
491
492static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
493{
494 struct sk_buff *_skb;
495 struct sk_buff_head rx_queue;
496 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
497
498 skb_queue_head_init(&rx_queue);
499 if (rtlusb->usb_rx_segregate_hdl)
500 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
501 WARN_ON(skb_queue_empty(&rx_queue));
502 while (!skb_queue_empty(&rx_queue)) {
503 _skb = skb_dequeue(&rx_queue);
504 _rtl_usb_rx_process_agg(hw, _skb);
505 ieee80211_rx(hw, _skb);
506 }
507}
508
509#define __RX_SKB_MAX_QUEUED 64
510
511static void _rtl_rx_work(struct tasklet_struct *t)
512{
513 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet);
514 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
515 struct sk_buff *skb;
516
517 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
518 if (unlikely(IS_USB_STOP(rtlusb))) {
519 dev_kfree_skb_any(skb);
520 continue;
521 }
522
523 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
524 _rtl_usb_rx_process_noagg(hw, skb);
525 } else {
526 /* TO DO */
527 _rtl_rx_pre_process(hw, skb);
528 pr_err("rx agg not supported\n");
529 }
530 }
531}
532
533static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
534 unsigned int len)
535{
536#if NET_IP_ALIGN != 0
537 unsigned int padding = 0;
538#endif
539
540 /* make function no-op when possible */
541 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
542 return 0;
543
544#if NET_IP_ALIGN != 0
545 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
546 /* TODO: deduplicate common code, define helper function instead? */
547
548 if (ieee80211_is_data_qos(hdr->frame_control)) {
549 u8 *qc = ieee80211_get_qos_ctl(hdr);
550
551 padding ^= NET_IP_ALIGN;
552
553 /* Input might be invalid, avoid accessing memory outside
554 * the buffer.
555 */
556 if ((unsigned long)qc - (unsigned long)hdr < len &&
557 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
558 padding ^= NET_IP_ALIGN;
559 }
560
561 if (ieee80211_has_a4(hdr->frame_control))
562 padding ^= NET_IP_ALIGN;
563
564 return padding;
565#endif
566}
567
568#define __RADIO_TAP_SIZE_RSV 32
569
570static void _rtl_rx_completed(struct urb *_urb)
571{
572 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
573 int err = 0;
574
575 if (unlikely(IS_USB_STOP(rtlusb)))
576 goto free;
577
578 if (likely(0 == _urb->status)) {
579 unsigned int padding;
580 struct sk_buff *skb;
581 unsigned int qlen;
582 unsigned int size = _urb->actual_length;
583 struct ieee80211_hdr *hdr;
584
585 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
586 pr_err("Too short packet from bulk IN! (len: %d)\n",
587 size);
588 goto resubmit;
589 }
590
591 qlen = skb_queue_len(&rtlusb->rx_queue);
592 if (qlen >= __RX_SKB_MAX_QUEUED) {
593 pr_err("Pending RX skbuff queue full! (qlen: %d)\n",
594 qlen);
595 goto resubmit;
596 }
597
598 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
599 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
600
601 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
602 if (!skb) {
603 pr_err("Can't allocate skb for bulk IN!\n");
604 goto resubmit;
605 }
606
607 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
608
609 /* Make sure the payload data is 4 byte aligned. */
610 skb_reserve(skb, padding);
611
612 /* reserve some space for mac80211's radiotap */
613 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
614
615 skb_put_data(skb, _urb->transfer_buffer, size);
616
617 skb_queue_tail(&rtlusb->rx_queue, skb);
618 tasklet_schedule(&rtlusb->rx_work_tasklet);
619
620 goto resubmit;
621 }
622
623 switch (_urb->status) {
624 /* disconnect */
625 case -ENOENT:
626 case -ECONNRESET:
627 case -ENODEV:
628 case -ESHUTDOWN:
629 goto free;
630 default:
631 break;
632 }
633
634resubmit:
635 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
636 err = usb_submit_urb(_urb, GFP_ATOMIC);
637 if (unlikely(err)) {
638 usb_unanchor_urb(_urb);
639 goto free;
640 }
641 return;
642
643free:
644 /* On some architectures, usb_free_coherent must not be called from
645 * hardirq context. Queue urb to cleanup list.
646 */
647 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
648}
649
650#undef __RADIO_TAP_SIZE_RSV
651
652static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
653{
654 struct rtl_priv *rtlpriv = rtl_priv(hw);
655 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
656 struct urb *urb;
657
658 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
659
660 tasklet_kill(&rtlusb->rx_work_tasklet);
661 cancel_work_sync(&rtlpriv->works.lps_change_work);
662
663 if (rtlpriv->works.rtl_wq) {
664 destroy_workqueue(rtlpriv->works.rtl_wq);
665 rtlpriv->works.rtl_wq = NULL;
666 }
667
668 skb_queue_purge(&rtlusb->rx_queue);
669
670 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
671 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
672 urb->transfer_buffer, urb->transfer_dma);
673 usb_free_urb(urb);
674 }
675}
676
677static int _rtl_usb_receive(struct ieee80211_hw *hw)
678{
679 struct urb *urb;
680 int err;
681 int i;
682 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
683
684 WARN_ON(0 == rtlusb->rx_urb_num);
685 /* 1600 == 1514 + max WLAN header + rtk info */
686 WARN_ON(rtlusb->rx_max_size < 1600);
687
688 for (i = 0; i < rtlusb->rx_urb_num; i++) {
689 err = -ENOMEM;
690 urb = usb_alloc_urb(0, GFP_KERNEL);
691 if (!urb)
692 goto err_out;
693
694 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
695 if (err < 0) {
696 pr_err("Failed to prep_rx_urb!!\n");
697 usb_free_urb(urb);
698 goto err_out;
699 }
700
701 usb_anchor_urb(urb, &rtlusb->rx_submitted);
702 err = usb_submit_urb(urb, GFP_KERNEL);
703 if (err) {
704 usb_unanchor_urb(urb);
705 usb_free_urb(urb);
706 goto err_out;
707 }
708 usb_free_urb(urb);
709 }
710 return 0;
711
712err_out:
713 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
714 return err;
715}
716
717static int rtl_usb_start(struct ieee80211_hw *hw)
718{
719 int err;
720 struct rtl_priv *rtlpriv = rtl_priv(hw);
721 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
722 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
723
724 err = rtlpriv->cfg->ops->hw_init(hw);
725 if (!err) {
726 rtl_init_rx_config(hw);
727
728 /* Enable software */
729 SET_USB_START(rtlusb);
730 /* should after adapter start and interrupt enable. */
731 set_hal_start(rtlhal);
732
733 /* Start bulk IN */
734 err = _rtl_usb_receive(hw);
735 }
736
737 return err;
738}
739
740/*======================= tx =========================================*/
741static void rtl_usb_cleanup(struct ieee80211_hw *hw)
742{
743 u32 i;
744 struct sk_buff *_skb;
745 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
746 struct ieee80211_tx_info *txinfo;
747
748 /* clean up rx stuff. */
749 _rtl_usb_cleanup_rx(hw);
750
751 /* clean up tx stuff */
752 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
753 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
754 rtlusb->usb_tx_cleanup(hw, _skb);
755 txinfo = IEEE80211_SKB_CB(_skb);
756 ieee80211_tx_info_clear_status(txinfo);
757 txinfo->flags |= IEEE80211_TX_STAT_ACK;
758 ieee80211_tx_status_irqsafe(hw, _skb);
759 }
760 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
761 }
762 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
763}
764
765/* We may add some struct into struct rtl_usb later. Do deinit here. */
766static void rtl_usb_deinit(struct ieee80211_hw *hw)
767{
768 rtl_usb_cleanup(hw);
769}
770
771static void rtl_usb_stop(struct ieee80211_hw *hw)
772{
773 struct rtl_priv *rtlpriv = rtl_priv(hw);
774 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
775 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
776 struct urb *urb;
777
778 /* should after adapter start and interrupt enable. */
779 set_hal_stop(rtlhal);
780 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
781 /* Enable software */
782 SET_USB_STOP(rtlusb);
783
784 /* free pre-allocated URBs from rtl_usb_start() */
785 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
786
787 tasklet_kill(&rtlusb->rx_work_tasklet);
788 cancel_work_sync(&rtlpriv->works.lps_change_work);
789 cancel_work_sync(&rtlpriv->works.update_beacon_work);
790
791 flush_workqueue(rtlpriv->works.rtl_wq);
792
793 skb_queue_purge(&rtlusb->rx_queue);
794
795 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
796 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
797 urb->transfer_buffer, urb->transfer_dma);
798 usb_free_urb(urb);
799 }
800
801 rtlpriv->cfg->ops->hw_disable(hw);
802}
803
804static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
805{
806 int err;
807 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
808
809 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
810 err = usb_submit_urb(_urb, GFP_ATOMIC);
811 if (err < 0) {
812 struct sk_buff *skb;
813
814 pr_err("Failed to submit urb\n");
815 usb_unanchor_urb(_urb);
816 skb = (struct sk_buff *)_urb->context;
817 kfree_skb(skb);
818 }
819 usb_free_urb(_urb);
820}
821
822static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
823 struct sk_buff *skb)
824{
825 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
826 struct ieee80211_tx_info *txinfo;
827
828 rtlusb->usb_tx_post_hdl(hw, urb, skb);
829 skb_pull(skb, RTL_TX_HEADER_SIZE);
830 txinfo = IEEE80211_SKB_CB(skb);
831 ieee80211_tx_info_clear_status(txinfo);
832 txinfo->flags |= IEEE80211_TX_STAT_ACK;
833
834 if (urb->status) {
835 pr_err("Urb has error status 0x%X\n", urb->status);
836 goto out;
837 }
838 /* TODO: statistics */
839out:
840 ieee80211_tx_status_irqsafe(hw, skb);
841 return urb->status;
842}
843
844static void _rtl_tx_complete(struct urb *urb)
845{
846 struct sk_buff *skb = (struct sk_buff *)urb->context;
847 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
848 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
849 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
850 int err;
851
852 if (unlikely(IS_USB_STOP(rtlusb)))
853 return;
854 err = _usb_tx_post(hw, urb, skb);
855 if (err) {
856 /* Ignore error and keep issuiing other urbs */
857 return;
858 }
859}
860
861static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
862 struct sk_buff *skb, u32 ep_num)
863{
864 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
865 struct urb *_urb;
866
867 WARN_ON(NULL == skb);
868 _urb = usb_alloc_urb(0, GFP_ATOMIC);
869 if (!_urb)
870 return NULL;
871 _rtl_install_trx_info(rtlusb, skb, ep_num);
872 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
873 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
874 _urb->transfer_flags |= URB_ZERO_PACKET;
875 return _urb;
876}
877
878static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
879 enum rtl_txq qnum)
880{
881 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
882 u32 ep_num;
883 struct urb *_urb = NULL;
884
885 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
886 if (unlikely(IS_USB_STOP(rtlusb))) {
887 pr_err("USB device is stopping...\n");
888 kfree_skb(skb);
889 return;
890 }
891 ep_num = rtlusb->ep_map.ep_mapping[qnum];
892 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num);
893 if (unlikely(!_urb)) {
894 pr_err("Can't allocate urb. Drop skb!\n");
895 kfree_skb(skb);
896 return;
897 }
898 _rtl_submit_tx_urb(hw, _urb);
899}
900
901static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
902 struct ieee80211_sta *sta,
903 struct sk_buff *skb,
904 u16 hw_queue)
905{
906 struct rtl_priv *rtlpriv = rtl_priv(hw);
907 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
908 struct rtl_tx_desc *pdesc = NULL;
909 struct rtl_tcb_desc tcb_desc;
910 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
911 __le16 fc = hdr->frame_control;
912 u8 *pda_addr = hdr->addr1;
913
914 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
915 if (ieee80211_is_auth(fc)) {
916 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
917 }
918
919 if (rtlpriv->psc.sw_ps_enabled) {
920 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
921 !ieee80211_has_pm(fc))
922 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
923 }
924
925 rtl_action_proc(hw, skb, true);
926 if (is_multicast_ether_addr(pda_addr))
927 rtlpriv->stats.txbytesmulticast += skb->len;
928 else if (is_broadcast_ether_addr(pda_addr))
929 rtlpriv->stats.txbytesbroadcast += skb->len;
930 else
931 rtlpriv->stats.txbytesunicast += skb->len;
932 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
933 hw_queue, &tcb_desc);
934 if (ieee80211_is_data(fc))
935 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
936}
937
938static int rtl_usb_tx(struct ieee80211_hw *hw,
939 struct ieee80211_sta *sta,
940 struct sk_buff *skb,
941 struct rtl_tcb_desc *dummy)
942{
943 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
944 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
945 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
946 __le16 fc = hdr->frame_control;
947 u16 hw_queue;
948
949 if (unlikely(is_hal_stop(rtlhal)))
950 goto err_free;
951 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
952 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
953 _rtl_usb_transmit(hw, skb, hw_queue);
954 return NETDEV_TX_OK;
955
956err_free:
957 dev_kfree_skb_any(skb);
958 return NETDEV_TX_OK;
959}
960
961static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
962 struct ieee80211_sta *sta,
963 struct sk_buff *skb)
964{
965 return false;
966}
967
968static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
969{
970 struct rtl_works *rtlworks =
971 container_of(work, struct rtl_works, fill_h2c_cmd);
972 struct ieee80211_hw *hw = rtlworks->hw;
973 struct rtl_priv *rtlpriv = rtl_priv(hw);
974
975 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
976}
977
978static const struct rtl_intf_ops rtl_usb_ops = {
979 .adapter_start = rtl_usb_start,
980 .adapter_stop = rtl_usb_stop,
981 .adapter_tx = rtl_usb_tx,
982 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
983};
984
985int rtl_usb_probe(struct usb_interface *intf,
986 const struct usb_device_id *id,
987 struct rtl_hal_cfg *rtl_hal_cfg)
988{
989 int err;
990 struct ieee80211_hw *hw = NULL;
991 struct rtl_priv *rtlpriv = NULL;
992 struct usb_device *udev;
993 struct rtl_usb_priv *usb_priv;
994
995 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
996 sizeof(struct rtl_usb_priv), &rtl_ops);
997 if (!hw) {
998 pr_warn("rtl_usb: ieee80211 alloc failed\n");
999 return -ENOMEM;
1000 }
1001 rtlpriv = hw->priv;
1002 rtlpriv->hw = hw;
1003 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32),
1004 GFP_KERNEL);
1005 if (!rtlpriv->usb_data) {
1006 ieee80211_free_hw(hw);
1007 return -ENOMEM;
1008 }
1009
1010 /* this spin lock must be initialized early */
1011 spin_lock_init(&rtlpriv->locks.usb_lock);
1012 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1013 rtl_fill_h2c_cmd_work_callback);
1014 INIT_WORK(&rtlpriv->works.lps_change_work,
1015 rtl_lps_change_work_callback);
1016 INIT_WORK(&rtlpriv->works.update_beacon_work,
1017 rtl_update_beacon_work_callback);
1018
1019 rtlpriv->usb_data_index = 0;
1020 init_completion(&rtlpriv->firmware_loading_complete);
1021 SET_IEEE80211_DEV(hw, &intf->dev);
1022 udev = interface_to_usbdev(intf);
1023 usb_get_dev(udev);
1024 usb_priv = rtl_usbpriv(hw);
1025 memset(usb_priv, 0, sizeof(*usb_priv));
1026 usb_priv->dev.intf = intf;
1027 usb_priv->dev.udev = udev;
1028 usb_set_intfdata(intf, hw);
1029 /* init cfg & intf_ops */
1030 rtlpriv->rtlhal.interface = INTF_USB;
1031 rtlpriv->cfg = rtl_hal_cfg;
1032 rtlpriv->intf_ops = &rtl_usb_ops;
1033 /* Init IO handler */
1034 _rtl_usb_io_handler_init(&udev->dev, hw);
1035 rtlpriv->cfg->ops->read_chip_version(hw);
1036 /*like read eeprom and so on */
1037 rtlpriv->cfg->ops->read_eeprom_info(hw);
1038 err = _rtl_usb_init(hw);
1039 if (err)
1040 goto error_out2;
1041 rtl_usb_init_sw(hw);
1042 /* Init mac80211 sw */
1043 err = rtl_init_core(hw);
1044 if (err) {
1045 pr_err("Can't allocate sw for mac80211\n");
1046 goto error_out2;
1047 }
1048 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1049 pr_err("Can't init_sw_vars\n");
1050 goto error_out;
1051 }
1052 rtl_init_sw_leds(hw);
1053
1054 err = ieee80211_register_hw(hw);
1055 if (err) {
1056 pr_err("Can't register mac80211 hw.\n");
1057 goto error_out;
1058 }
1059 rtlpriv->mac80211.mac80211_registered = 1;
1060
1061 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1062 return 0;
1063
1064error_out:
1065 rtl_deinit_core(hw);
1066error_out2:
1067 _rtl_usb_io_handler_release(hw);
1068 usb_put_dev(udev);
1069 complete(&rtlpriv->firmware_loading_complete);
1070 kfree(rtlpriv->usb_data);
1071 ieee80211_free_hw(hw);
1072 return -ENODEV;
1073}
1074EXPORT_SYMBOL(rtl_usb_probe);
1075
1076void rtl_usb_disconnect(struct usb_interface *intf)
1077{
1078 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1079 struct rtl_priv *rtlpriv = rtl_priv(hw);
1080 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1081 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1082
1083 if (unlikely(!rtlpriv))
1084 return;
1085 /* just in case driver is removed before firmware callback */
1086 wait_for_completion(&rtlpriv->firmware_loading_complete);
1087 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1088 /*ieee80211_unregister_hw will call ops_stop */
1089 if (rtlmac->mac80211_registered == 1) {
1090 ieee80211_unregister_hw(hw);
1091 rtlmac->mac80211_registered = 0;
1092 } else {
1093 rtl_deinit_deferred_work(hw, false);
1094 rtlpriv->intf_ops->adapter_stop(hw);
1095 }
1096 /*deinit rfkill */
1097 /* rtl_deinit_rfkill(hw); */
1098 rtl_usb_deinit(hw);
1099 rtl_deinit_core(hw);
1100 kfree(rtlpriv->usb_data);
1101 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1102 _rtl_usb_io_handler_release(hw);
1103 usb_put_dev(rtlusb->udev);
1104 usb_set_intfdata(intf, NULL);
1105 ieee80211_free_hw(hw);
1106}
1107EXPORT_SYMBOL(rtl_usb_disconnect);
1108
1109int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1110{
1111 return 0;
1112}
1113EXPORT_SYMBOL(rtl_usb_suspend);
1114
1115int rtl_usb_resume(struct usb_interface *pusb_intf)
1116{
1117 return 0;
1118}
1119EXPORT_SYMBOL(rtl_usb_resume);
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2009-2012 Realtek Corporation.*/
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_vendorreq_sync(struct usb_device *udev, u8 reqtype,
27 u16 value, void *pdata, u16 len)
28{
29 unsigned int pipe;
30 int status;
31 int vendorreq_times = 0;
32 static int count;
33
34 if (reqtype == REALTEK_USB_VENQT_READ)
35 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
36 else
37 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
38
39 do {
40 status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ,
41 reqtype, value, REALTEK_USB_VENQT_CMD_IDX,
42 pdata, len, 1000);
43 if (status < 0) {
44 /* firmware download is checksumed, don't retry */
45 if ((value >= FW_8192C_START_ADDRESS &&
46 value <= FW_8192C_END_ADDRESS))
47 break;
48 } else {
49 break;
50 }
51 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
52
53 if (status < 0 && count++ < 4)
54 dev_err(&udev->dev, "reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x reqtype=0x%x\n",
55 value, status, *(u32 *)pdata, reqtype);
56}
57
58static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
59{
60 struct device *dev = rtlpriv->io.dev;
61 struct usb_device *udev = to_usb_device(dev);
62 u16 wvalue;
63 __le32 *data;
64 unsigned long flags;
65
66 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
67 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
68 rtlpriv->usb_data_index = 0;
69 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
70 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
71
72 wvalue = (u16)addr;
73 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_READ, wvalue, data, len);
74 return le32_to_cpu(*data);
75}
76
77
78static void _usb_write_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val, u16 len)
79{
80 struct device *dev = rtlpriv->io.dev;
81 struct usb_device *udev = to_usb_device(dev);
82 unsigned long flags;
83 __le32 *data;
84 u16 wvalue;
85
86 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
87 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
88 rtlpriv->usb_data_index = 0;
89 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
90 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
91
92 wvalue = (u16)(addr & 0x0000ffff);
93 *data = cpu_to_le32(val);
94
95 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, wvalue, data, len);
96}
97
98static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
99{
100 return (u8)_usb_read_sync(rtlpriv, addr, 1);
101}
102
103static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
104{
105 return (u16)_usb_read_sync(rtlpriv, addr, 2);
106}
107
108static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
109{
110 return _usb_read_sync(rtlpriv, addr, 4);
111}
112
113static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val)
114{
115 _usb_write_sync(rtlpriv, addr, val, 1);
116}
117
118static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val)
119{
120 _usb_write_sync(rtlpriv, addr, val, 2);
121}
122
123static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val)
124{
125 _usb_write_sync(rtlpriv, addr, val, 4);
126}
127
128static void _usb_write_chunk_sync(struct rtl_priv *rtlpriv, u32 addr,
129 u32 length, u8 *data)
130{
131 struct usb_device *udev = to_usb_device(rtlpriv->io.dev);
132
133 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, addr, data, length);
134}
135
136static void _rtl_usb_io_handler_init(struct device *dev,
137 struct ieee80211_hw *hw)
138{
139 struct rtl_priv *rtlpriv = rtl_priv(hw);
140
141 rtlpriv->io.dev = dev;
142 mutex_init(&rtlpriv->io.bb_mutex);
143 rtlpriv->io.write8 = _usb_write8_sync;
144 rtlpriv->io.write16 = _usb_write16_sync;
145 rtlpriv->io.write32 = _usb_write32_sync;
146 rtlpriv->io.write_chunk = _usb_write_chunk_sync;
147 rtlpriv->io.read8 = _usb_read8_sync;
148 rtlpriv->io.read16 = _usb_read16_sync;
149 rtlpriv->io.read32 = _usb_read32_sync;
150}
151
152static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
153{
154 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
155
156 mutex_destroy(&rtlpriv->io.bb_mutex);
157}
158
159/* Default aggregation handler. Do nothing and just return the oldest skb. */
160static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
161 struct sk_buff_head *list)
162{
163 return skb_dequeue(list);
164}
165
166#define IS_HIGH_SPEED_USB(udev) \
167 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
168
169static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
170{
171 u32 i;
172 struct rtl_priv *rtlpriv = rtl_priv(hw);
173 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
174
175 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
176 ? USB_HIGH_SPEED_BULK_SIZE
177 : USB_FULL_SPEED_BULK_SIZE;
178
179 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
180 rtlusb->max_bulk_out_size);
181
182 for (i = 0; i < __RTL_TXQ_NUM; i++) {
183 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
184
185 if (!ep_num) {
186 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
187 "Invalid endpoint map setting!\n");
188 return -EINVAL;
189 }
190 }
191
192 rtlusb->usb_tx_post_hdl =
193 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
194 rtlusb->usb_tx_cleanup =
195 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
196 rtlusb->usb_tx_aggregate_hdl =
197 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
198 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
199 : &_none_usb_tx_aggregate_hdl;
200
201 init_usb_anchor(&rtlusb->tx_submitted);
202 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
203 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
204 init_usb_anchor(&rtlusb->tx_pending[i]);
205 }
206 return 0;
207}
208
209static void _rtl_rx_work(struct tasklet_struct *t);
210
211static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
212{
213 struct rtl_priv *rtlpriv = rtl_priv(hw);
214 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
215 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
216
217 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
218 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
219 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
220 rtlusb->usb_rx_segregate_hdl =
221 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
222
223 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
224 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
225 init_usb_anchor(&rtlusb->rx_submitted);
226 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
227
228 skb_queue_head_init(&rtlusb->rx_queue);
229 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work);
230
231 return 0;
232}
233
234static int _rtl_usb_init(struct ieee80211_hw *hw)
235{
236 struct rtl_priv *rtlpriv = rtl_priv(hw);
237 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
238 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
239 int err;
240 u8 epidx;
241 struct usb_interface *usb_intf = rtlusb->intf;
242 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
243
244 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
245 for (epidx = 0; epidx < epnums; epidx++) {
246 struct usb_endpoint_descriptor *pep_desc;
247
248 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
249
250 if (usb_endpoint_dir_in(pep_desc)) {
251 if (usb_endpoint_xfer_bulk(pep_desc)) {
252 /* The vendor drivers assume there is only one
253 * bulk in ep and that it's the first in ep.
254 */
255 if (rtlusb->in_ep_nums == 0)
256 rtlusb->in_ep = usb_endpoint_num(pep_desc);
257 else
258 pr_warn("%s: bulk in endpoint is not the first in endpoint\n",
259 __func__);
260 }
261
262 rtlusb->in_ep_nums++;
263 } else if (usb_endpoint_dir_out(pep_desc)) {
264 if (rtlusb->out_ep_nums < RTL_USB_MAX_BULKOUT_NUM) {
265 if (usb_endpoint_xfer_bulk(pep_desc))
266 rtlusb->out_eps[rtlusb->out_ep_nums] =
267 usb_endpoint_num(pep_desc);
268 } else {
269 pr_warn("%s: found more bulk out endpoints than the expected %d\n",
270 __func__, RTL_USB_MAX_BULKOUT_NUM);
271 }
272
273 rtlusb->out_ep_nums++;
274 }
275
276 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
277 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
278 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
279 pep_desc->bInterval);
280 }
281
282 if (rtlusb->out_ep_nums == 0) {
283 pr_err("No output end points found\n");
284 return -EINVAL;
285 }
286 /* usb endpoint mapping */
287 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
288 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
289 _rtl_usb_init_tx(hw);
290 _rtl_usb_init_rx(hw);
291 return err;
292}
293
294static void rtl_usb_init_sw(struct ieee80211_hw *hw)
295{
296 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
297 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
298 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
299 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
300
301 rtlhal->hw = hw;
302 ppsc->inactiveps = false;
303 ppsc->leisure_ps = false;
304 ppsc->fwctrl_lps = false;
305 ppsc->reg_fwctrl_lps = 3;
306 ppsc->reg_max_lps_awakeintvl = 5;
307 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
308
309 /* IBSS */
310 mac->beacon_interval = 100;
311
312 /* AMPDU */
313 mac->min_space_cfg = 0;
314 mac->max_mss_density = 0;
315
316 /* set sane AMPDU defaults */
317 mac->current_ampdu_density = 7;
318 mac->current_ampdu_factor = 3;
319
320 /* QOS */
321 rtlusb->acm_method = EACMWAY2_SW;
322
323 /* IRQ */
324 /* HIMR - turn all on */
325 rtlusb->irq_mask[0] = 0xFFFFFFFF;
326 /* HIMR_EX - turn all on */
327 rtlusb->irq_mask[1] = 0xFFFFFFFF;
328 rtlusb->disablehwsm = true;
329}
330
331static void _rtl_rx_completed(struct urb *urb);
332
333static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
334 struct urb *urb, gfp_t gfp_mask)
335{
336 void *buf;
337
338 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
339 &urb->transfer_dma);
340 if (!buf) {
341 pr_err("Failed to usb_alloc_coherent!!\n");
342 return -ENOMEM;
343 }
344
345 usb_fill_bulk_urb(urb, rtlusb->udev,
346 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
347 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
348 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
349
350 return 0;
351}
352
353static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
354 struct sk_buff *skb)
355{
356 struct rtl_priv *rtlpriv = rtl_priv(hw);
357 u8 *rxdesc = skb->data;
358 struct ieee80211_hdr *hdr;
359 bool unicast = false;
360 __le16 fc;
361 struct ieee80211_rx_status rx_status = {0};
362 struct rtl_stats stats = {
363 .signal = 0,
364 .rate = 0,
365 };
366
367 skb_pull(skb, RTL_RX_DESC_SIZE);
368 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
369 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
370 hdr = rtl_get_hdr(skb);
371 fc = hdr->frame_control;
372 if (!stats.crc) {
373 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
374
375 if (is_broadcast_ether_addr(hdr->addr1)) {
376 /*TODO*/;
377 } else if (is_multicast_ether_addr(hdr->addr1)) {
378 /*TODO*/
379 } else {
380 unicast = true;
381 rtlpriv->stats.rxbytesunicast += skb->len;
382 }
383
384 if (ieee80211_is_data(fc)) {
385 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
386
387 if (unicast)
388 rtlpriv->link_info.num_rx_inperiod++;
389 }
390 /* static bcn for roaming */
391 rtl_beacon_statistic(hw, skb);
392 }
393}
394
395static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
396 struct sk_buff *skb)
397{
398 struct rtl_priv *rtlpriv = rtl_priv(hw);
399 u8 *rxdesc = skb->data;
400 struct ieee80211_hdr *hdr;
401 bool unicast = false;
402 __le16 fc;
403 struct ieee80211_rx_status rx_status = {0};
404 struct rtl_stats stats = {
405 .signal = 0,
406 .rate = 0,
407 };
408
409 skb_pull(skb, RTL_RX_DESC_SIZE);
410 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
411 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
412 hdr = rtl_get_hdr(skb);
413 fc = hdr->frame_control;
414 if (!stats.crc) {
415 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
416
417 if (is_broadcast_ether_addr(hdr->addr1)) {
418 /*TODO*/;
419 } else if (is_multicast_ether_addr(hdr->addr1)) {
420 /*TODO*/
421 } else {
422 unicast = true;
423 rtlpriv->stats.rxbytesunicast += skb->len;
424 }
425
426 if (ieee80211_is_data(fc)) {
427 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
428
429 if (unicast)
430 rtlpriv->link_info.num_rx_inperiod++;
431 }
432
433 /* static bcn for roaming */
434 rtl_beacon_statistic(hw, skb);
435
436 if (likely(rtl_action_proc(hw, skb, false)))
437 ieee80211_rx(hw, skb);
438 else
439 dev_kfree_skb_any(skb);
440 } else {
441 dev_kfree_skb_any(skb);
442 }
443}
444
445static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
446{
447 struct sk_buff *_skb;
448 struct sk_buff_head rx_queue;
449 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
450
451 skb_queue_head_init(&rx_queue);
452 if (rtlusb->usb_rx_segregate_hdl)
453 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
454 WARN_ON(skb_queue_empty(&rx_queue));
455 while (!skb_queue_empty(&rx_queue)) {
456 _skb = skb_dequeue(&rx_queue);
457 _rtl_usb_rx_process_agg(hw, _skb);
458 ieee80211_rx(hw, _skb);
459 }
460}
461
462#define __RX_SKB_MAX_QUEUED 64
463
464static void _rtl_rx_work(struct tasklet_struct *t)
465{
466 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet);
467 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
468 struct sk_buff *skb;
469
470 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
471 if (unlikely(IS_USB_STOP(rtlusb))) {
472 dev_kfree_skb_any(skb);
473 continue;
474 }
475
476 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
477 _rtl_usb_rx_process_noagg(hw, skb);
478 } else {
479 /* TO DO */
480 _rtl_rx_pre_process(hw, skb);
481 pr_err("rx agg not supported\n");
482 }
483 }
484}
485
486static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
487 unsigned int len)
488{
489#if NET_IP_ALIGN != 0
490 unsigned int padding = 0;
491#endif
492
493 /* make function no-op when possible */
494 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
495 return 0;
496
497#if NET_IP_ALIGN != 0
498 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
499 /* TODO: deduplicate common code, define helper function instead? */
500
501 if (ieee80211_is_data_qos(hdr->frame_control)) {
502 u8 *qc = ieee80211_get_qos_ctl(hdr);
503
504 padding ^= NET_IP_ALIGN;
505
506 /* Input might be invalid, avoid accessing memory outside
507 * the buffer.
508 */
509 if ((unsigned long)qc - (unsigned long)hdr < len &&
510 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
511 padding ^= NET_IP_ALIGN;
512 }
513
514 if (ieee80211_has_a4(hdr->frame_control))
515 padding ^= NET_IP_ALIGN;
516
517 return padding;
518#endif
519}
520
521#define __RADIO_TAP_SIZE_RSV 32
522
523static void _rtl_rx_completed(struct urb *_urb)
524{
525 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
526 int err = 0;
527
528 if (unlikely(IS_USB_STOP(rtlusb)))
529 goto free;
530
531 if (likely(0 == _urb->status)) {
532 unsigned int padding;
533 struct sk_buff *skb;
534 unsigned int qlen;
535 unsigned int size = _urb->actual_length;
536 struct ieee80211_hdr *hdr;
537
538 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
539 pr_err("Too short packet from bulk IN! (len: %d)\n",
540 size);
541 goto resubmit;
542 }
543
544 qlen = skb_queue_len(&rtlusb->rx_queue);
545 if (qlen >= __RX_SKB_MAX_QUEUED) {
546 pr_err("Pending RX skbuff queue full! (qlen: %d)\n",
547 qlen);
548 goto resubmit;
549 }
550
551 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
552 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
553
554 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
555 if (!skb) {
556 pr_err("Can't allocate skb for bulk IN!\n");
557 goto resubmit;
558 }
559
560 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
561
562 /* Make sure the payload data is 4 byte aligned. */
563 skb_reserve(skb, padding);
564
565 /* reserve some space for mac80211's radiotap */
566 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
567
568 skb_put_data(skb, _urb->transfer_buffer, size);
569
570 skb_queue_tail(&rtlusb->rx_queue, skb);
571 tasklet_schedule(&rtlusb->rx_work_tasklet);
572
573 goto resubmit;
574 }
575
576 switch (_urb->status) {
577 /* disconnect */
578 case -ENOENT:
579 case -ECONNRESET:
580 case -ENODEV:
581 case -ESHUTDOWN:
582 goto free;
583 default:
584 break;
585 }
586
587resubmit:
588 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
589 err = usb_submit_urb(_urb, GFP_ATOMIC);
590 if (unlikely(err)) {
591 usb_unanchor_urb(_urb);
592 goto free;
593 }
594 return;
595
596free:
597 /* On some architectures, usb_free_coherent must not be called from
598 * hardirq context. Queue urb to cleanup list.
599 */
600 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
601}
602
603#undef __RADIO_TAP_SIZE_RSV
604
605static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
606{
607 struct rtl_priv *rtlpriv = rtl_priv(hw);
608 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
609 struct urb *urb;
610
611 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
612
613 tasklet_kill(&rtlusb->rx_work_tasklet);
614 cancel_work_sync(&rtlpriv->works.lps_change_work);
615
616 if (rtlpriv->works.rtl_wq) {
617 destroy_workqueue(rtlpriv->works.rtl_wq);
618 rtlpriv->works.rtl_wq = NULL;
619 }
620
621 skb_queue_purge(&rtlusb->rx_queue);
622
623 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
624 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
625 urb->transfer_buffer, urb->transfer_dma);
626 usb_free_urb(urb);
627 }
628}
629
630static int _rtl_usb_receive(struct ieee80211_hw *hw)
631{
632 struct urb *urb;
633 int err;
634 int i;
635 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
636
637 WARN_ON(0 == rtlusb->rx_urb_num);
638 /* 1600 == 1514 + max WLAN header + rtk info */
639 WARN_ON(rtlusb->rx_max_size < 1600);
640
641 for (i = 0; i < rtlusb->rx_urb_num; i++) {
642 err = -ENOMEM;
643 urb = usb_alloc_urb(0, GFP_KERNEL);
644 if (!urb)
645 goto err_out;
646
647 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
648 if (err < 0) {
649 pr_err("Failed to prep_rx_urb!!\n");
650 usb_free_urb(urb);
651 goto err_out;
652 }
653
654 usb_anchor_urb(urb, &rtlusb->rx_submitted);
655 err = usb_submit_urb(urb, GFP_KERNEL);
656 if (err) {
657 usb_unanchor_urb(urb);
658 usb_free_urb(urb);
659 goto err_out;
660 }
661 usb_free_urb(urb);
662 }
663 return 0;
664
665err_out:
666 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
667 return err;
668}
669
670static int rtl_usb_start(struct ieee80211_hw *hw)
671{
672 int err;
673 struct rtl_priv *rtlpriv = rtl_priv(hw);
674 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
675 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
676
677 err = rtlpriv->cfg->ops->hw_init(hw);
678 if (!err) {
679 rtl_init_rx_config(hw);
680
681 /* Enable software */
682 SET_USB_START(rtlusb);
683 /* should after adapter start and interrupt enable. */
684 set_hal_start(rtlhal);
685
686 /* Start bulk IN */
687 err = _rtl_usb_receive(hw);
688 }
689
690 return err;
691}
692
693/*======================= tx =========================================*/
694static void rtl_usb_cleanup(struct ieee80211_hw *hw)
695{
696 u32 i;
697 struct sk_buff *_skb;
698 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
699 struct ieee80211_tx_info *txinfo;
700
701 /* clean up rx stuff. */
702 _rtl_usb_cleanup_rx(hw);
703
704 /* clean up tx stuff */
705 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
706 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
707 rtlusb->usb_tx_cleanup(hw, _skb);
708 txinfo = IEEE80211_SKB_CB(_skb);
709 ieee80211_tx_info_clear_status(txinfo);
710 txinfo->flags |= IEEE80211_TX_STAT_ACK;
711 ieee80211_tx_status_irqsafe(hw, _skb);
712 }
713 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
714 }
715 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
716}
717
718/* We may add some struct into struct rtl_usb later. Do deinit here. */
719static void rtl_usb_deinit(struct ieee80211_hw *hw)
720{
721 rtl_usb_cleanup(hw);
722}
723
724static void rtl_usb_stop(struct ieee80211_hw *hw)
725{
726 struct rtl_priv *rtlpriv = rtl_priv(hw);
727 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
728 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
729 struct urb *urb;
730
731 /* should after adapter start and interrupt enable. */
732 set_hal_stop(rtlhal);
733 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
734 /* Enable software */
735 SET_USB_STOP(rtlusb);
736
737 /* free pre-allocated URBs from rtl_usb_start() */
738 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
739
740 tasklet_kill(&rtlusb->rx_work_tasklet);
741 cancel_work_sync(&rtlpriv->works.lps_change_work);
742 cancel_work_sync(&rtlpriv->works.update_beacon_work);
743
744 flush_workqueue(rtlpriv->works.rtl_wq);
745
746 skb_queue_purge(&rtlusb->rx_queue);
747
748 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
749 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
750 urb->transfer_buffer, urb->transfer_dma);
751 usb_free_urb(urb);
752 }
753
754 rtlpriv->cfg->ops->hw_disable(hw);
755}
756
757static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
758{
759 int err;
760 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
761
762 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
763 err = usb_submit_urb(_urb, GFP_ATOMIC);
764 if (err < 0) {
765 struct sk_buff *skb;
766
767 pr_err("Failed to submit urb\n");
768 usb_unanchor_urb(_urb);
769 skb = (struct sk_buff *)_urb->context;
770 kfree_skb(skb);
771 }
772 usb_free_urb(_urb);
773}
774
775static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
776 struct sk_buff *skb)
777{
778 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
779 struct ieee80211_tx_info *txinfo;
780
781 rtlusb->usb_tx_post_hdl(hw, urb, skb);
782 skb_pull(skb, RTL_TX_HEADER_SIZE);
783 txinfo = IEEE80211_SKB_CB(skb);
784 ieee80211_tx_info_clear_status(txinfo);
785 txinfo->flags |= IEEE80211_TX_STAT_ACK;
786
787 if (urb->status) {
788 pr_err("Urb has error status 0x%X\n", urb->status);
789 goto out;
790 }
791 /* TODO: statistics */
792out:
793 ieee80211_tx_status_irqsafe(hw, skb);
794 return urb->status;
795}
796
797static void _rtl_tx_complete(struct urb *urb)
798{
799 struct sk_buff *skb = (struct sk_buff *)urb->context;
800 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
801 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
802 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
803 int err;
804
805 if (unlikely(IS_USB_STOP(rtlusb)))
806 return;
807 err = _usb_tx_post(hw, urb, skb);
808 if (err) {
809 /* Ignore error and keep issuiing other urbs */
810 return;
811 }
812}
813
814static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
815 struct sk_buff *skb, u32 ep_num)
816{
817 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
818 struct urb *_urb;
819
820 WARN_ON(NULL == skb);
821 _urb = usb_alloc_urb(0, GFP_ATOMIC);
822 if (!_urb)
823 return NULL;
824 _rtl_install_trx_info(rtlusb, skb, ep_num);
825 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
826 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
827 _urb->transfer_flags |= URB_ZERO_PACKET;
828 return _urb;
829}
830
831static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
832 enum rtl_txq qnum)
833{
834 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
835 u32 ep_num;
836 struct urb *_urb = NULL;
837
838 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
839 if (unlikely(IS_USB_STOP(rtlusb))) {
840 pr_err("USB device is stopping...\n");
841 kfree_skb(skb);
842 return;
843 }
844 ep_num = rtlusb->ep_map.ep_mapping[qnum];
845 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num);
846 if (unlikely(!_urb)) {
847 pr_err("Can't allocate urb. Drop skb!\n");
848 kfree_skb(skb);
849 return;
850 }
851 _rtl_submit_tx_urb(hw, _urb);
852}
853
854static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
855 struct ieee80211_sta *sta,
856 struct sk_buff *skb,
857 u16 hw_queue)
858{
859 struct rtl_priv *rtlpriv = rtl_priv(hw);
860 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
861 struct rtl_tx_desc *pdesc = NULL;
862 struct rtl_tcb_desc tcb_desc;
863 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
864 __le16 fc = hdr->frame_control;
865 u8 *pda_addr = hdr->addr1;
866
867 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
868 if (ieee80211_is_auth(fc)) {
869 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
870 }
871
872 if (rtlpriv->psc.sw_ps_enabled) {
873 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
874 !ieee80211_has_pm(fc))
875 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
876 }
877
878 rtl_action_proc(hw, skb, true);
879 if (is_multicast_ether_addr(pda_addr))
880 rtlpriv->stats.txbytesmulticast += skb->len;
881 else if (is_broadcast_ether_addr(pda_addr))
882 rtlpriv->stats.txbytesbroadcast += skb->len;
883 else
884 rtlpriv->stats.txbytesunicast += skb->len;
885 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
886 hw_queue, &tcb_desc);
887 if (ieee80211_is_data(fc))
888 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
889}
890
891static int rtl_usb_tx(struct ieee80211_hw *hw,
892 struct ieee80211_sta *sta,
893 struct sk_buff *skb,
894 struct rtl_tcb_desc *dummy)
895{
896 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
897 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
898 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
899 __le16 fc = hdr->frame_control;
900 u16 hw_queue;
901
902 if (unlikely(is_hal_stop(rtlhal)))
903 goto err_free;
904 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
905 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
906 _rtl_usb_transmit(hw, skb, hw_queue);
907 return NETDEV_TX_OK;
908
909err_free:
910 dev_kfree_skb_any(skb);
911 return NETDEV_TX_OK;
912}
913
914static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
915 struct ieee80211_sta *sta,
916 struct sk_buff *skb)
917{
918 return false;
919}
920
921static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
922{
923 struct rtl_works *rtlworks =
924 container_of(work, struct rtl_works, fill_h2c_cmd);
925 struct ieee80211_hw *hw = rtlworks->hw;
926 struct rtl_priv *rtlpriv = rtl_priv(hw);
927
928 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
929}
930
931static const struct rtl_intf_ops rtl_usb_ops = {
932 .adapter_start = rtl_usb_start,
933 .adapter_stop = rtl_usb_stop,
934 .adapter_tx = rtl_usb_tx,
935 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
936};
937
938int rtl_usb_probe(struct usb_interface *intf,
939 const struct usb_device_id *id,
940 struct rtl_hal_cfg *rtl_hal_cfg)
941{
942 int err;
943 struct ieee80211_hw *hw = NULL;
944 struct rtl_priv *rtlpriv = NULL;
945 struct usb_device *udev;
946 struct rtl_usb_priv *usb_priv;
947
948 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
949 sizeof(struct rtl_usb_priv), &rtl_ops);
950 if (!hw) {
951 pr_warn("rtl_usb: ieee80211 alloc failed\n");
952 return -ENOMEM;
953 }
954 rtlpriv = hw->priv;
955 rtlpriv->hw = hw;
956 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32),
957 GFP_KERNEL);
958 if (!rtlpriv->usb_data) {
959 ieee80211_free_hw(hw);
960 return -ENOMEM;
961 }
962
963 /* this spin lock must be initialized early */
964 spin_lock_init(&rtlpriv->locks.usb_lock);
965 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
966 rtl_fill_h2c_cmd_work_callback);
967 INIT_WORK(&rtlpriv->works.lps_change_work,
968 rtl_lps_change_work_callback);
969 INIT_WORK(&rtlpriv->works.update_beacon_work,
970 rtl_update_beacon_work_callback);
971
972 rtlpriv->usb_data_index = 0;
973 init_completion(&rtlpriv->firmware_loading_complete);
974 SET_IEEE80211_DEV(hw, &intf->dev);
975 udev = interface_to_usbdev(intf);
976 usb_get_dev(udev);
977 usb_priv = rtl_usbpriv(hw);
978 memset(usb_priv, 0, sizeof(*usb_priv));
979 usb_priv->dev.intf = intf;
980 usb_priv->dev.udev = udev;
981 usb_set_intfdata(intf, hw);
982 /* init cfg & intf_ops */
983 rtlpriv->rtlhal.interface = INTF_USB;
984 rtlpriv->cfg = rtl_hal_cfg;
985 rtlpriv->intf_ops = &rtl_usb_ops;
986 /* Init IO handler */
987 _rtl_usb_io_handler_init(&udev->dev, hw);
988 rtlpriv->cfg->ops->read_chip_version(hw);
989 /*like read eeprom and so on */
990 rtlpriv->cfg->ops->read_eeprom_info(hw);
991 err = _rtl_usb_init(hw);
992 if (err)
993 goto error_out2;
994 rtl_usb_init_sw(hw);
995 /* Init mac80211 sw */
996 err = rtl_init_core(hw);
997 if (err) {
998 pr_err("Can't allocate sw for mac80211\n");
999 goto error_out2;
1000 }
1001 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1002 pr_err("Can't init_sw_vars\n");
1003 goto error_out;
1004 }
1005 rtl_init_sw_leds(hw);
1006
1007 err = ieee80211_register_hw(hw);
1008 if (err) {
1009 pr_err("Can't register mac80211 hw.\n");
1010 goto error_out;
1011 }
1012 rtlpriv->mac80211.mac80211_registered = 1;
1013
1014 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1015 return 0;
1016
1017error_out:
1018 rtl_deinit_core(hw);
1019error_out2:
1020 _rtl_usb_io_handler_release(hw);
1021 usb_put_dev(udev);
1022 complete(&rtlpriv->firmware_loading_complete);
1023 kfree(rtlpriv->usb_data);
1024 ieee80211_free_hw(hw);
1025 return -ENODEV;
1026}
1027EXPORT_SYMBOL(rtl_usb_probe);
1028
1029void rtl_usb_disconnect(struct usb_interface *intf)
1030{
1031 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1032 struct rtl_priv *rtlpriv = rtl_priv(hw);
1033 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1034 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1035
1036 if (unlikely(!rtlpriv))
1037 return;
1038 /* just in case driver is removed before firmware callback */
1039 wait_for_completion(&rtlpriv->firmware_loading_complete);
1040 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1041 /*ieee80211_unregister_hw will call ops_stop */
1042 if (rtlmac->mac80211_registered == 1) {
1043 ieee80211_unregister_hw(hw);
1044 rtlmac->mac80211_registered = 0;
1045 } else {
1046 rtl_deinit_deferred_work(hw, false);
1047 rtlpriv->intf_ops->adapter_stop(hw);
1048 }
1049 /*deinit rfkill */
1050 /* rtl_deinit_rfkill(hw); */
1051 rtl_usb_deinit(hw);
1052 rtl_deinit_core(hw);
1053 kfree(rtlpriv->usb_data);
1054 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1055 _rtl_usb_io_handler_release(hw);
1056 usb_put_dev(rtlusb->udev);
1057 usb_set_intfdata(intf, NULL);
1058 ieee80211_free_hw(hw);
1059}
1060EXPORT_SYMBOL(rtl_usb_disconnect);
1061
1062int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1063{
1064 return 0;
1065}
1066EXPORT_SYMBOL(rtl_usb_suspend);
1067
1068int rtl_usb_resume(struct usb_interface *pusb_intf)
1069{
1070 return 0;
1071}
1072EXPORT_SYMBOL(rtl_usb_resume);