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1/******************************************************************************
2 *
3 * Copyright(c) 2009-2012 Realtek Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * wlanfae <wlanfae@realtek.com>
23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
24 * Hsinchu 300, Taiwan.
25 *
26 *****************************************************************************/
27
28#include "wifi.h"
29#include "core.h"
30#include "usb.h"
31#include "base.h"
32#include "ps.h"
33#include "rtl8192c/fw_common.h"
34#include <linux/export.h>
35#include <linux/module.h>
36
37MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
38MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
39MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
40MODULE_LICENSE("GPL");
41MODULE_DESCRIPTION("USB basic driver for rtlwifi");
42
43#define REALTEK_USB_VENQT_READ 0xC0
44#define REALTEK_USB_VENQT_WRITE 0x40
45#define REALTEK_USB_VENQT_CMD_REQ 0x05
46#define REALTEK_USB_VENQT_CMD_IDX 0x00
47
48#define MAX_USBCTRL_VENDORREQ_TIMES 10
49
50static void usbctrl_async_callback(struct urb *urb)
51{
52 if (urb) {
53 /* free dr */
54 kfree(urb->setup_packet);
55 /* free databuf */
56 kfree(urb->transfer_buffer);
57 }
58}
59
60static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
61 u16 value, u16 index, void *pdata,
62 u16 len)
63{
64 int rc;
65 unsigned int pipe;
66 u8 reqtype;
67 struct usb_ctrlrequest *dr;
68 struct urb *urb;
69 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
70 u8 *databuf;
71
72 if (WARN_ON_ONCE(len > databuf_maxlen))
73 len = databuf_maxlen;
74
75 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
76 reqtype = REALTEK_USB_VENQT_WRITE;
77
78 dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
79 if (!dr)
80 return -ENOMEM;
81
82 databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
83 if (!databuf) {
84 kfree(dr);
85 return -ENOMEM;
86 }
87
88 urb = usb_alloc_urb(0, GFP_ATOMIC);
89 if (!urb) {
90 kfree(databuf);
91 kfree(dr);
92 return -ENOMEM;
93 }
94
95 dr->bRequestType = reqtype;
96 dr->bRequest = request;
97 dr->wValue = cpu_to_le16(value);
98 dr->wIndex = cpu_to_le16(index);
99 dr->wLength = cpu_to_le16(len);
100 /* data are already in little-endian order */
101 memcpy(databuf, pdata, len);
102 usb_fill_control_urb(urb, udev, pipe,
103 (unsigned char *)dr, databuf, len,
104 usbctrl_async_callback, NULL);
105 rc = usb_submit_urb(urb, GFP_ATOMIC);
106 if (rc < 0) {
107 kfree(databuf);
108 kfree(dr);
109 }
110 usb_free_urb(urb);
111 return rc;
112}
113
114static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
115 u16 value, u16 index, void *pdata,
116 u16 len)
117{
118 unsigned int pipe;
119 int status;
120 u8 reqtype;
121 int vendorreq_times = 0;
122 static int count;
123
124 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
125 reqtype = REALTEK_USB_VENQT_READ;
126
127 do {
128 status = usb_control_msg(udev, pipe, request, reqtype, value,
129 index, pdata, len, 0); /*max. timeout*/
130 if (status < 0) {
131 /* firmware download is checksumed, don't retry */
132 if ((value >= FW_8192C_START_ADDRESS &&
133 value <= FW_8192C_END_ADDRESS))
134 break;
135 } else {
136 break;
137 }
138 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
139
140 if (status < 0 && count++ < 4)
141 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
142 value, status, *(u32 *)pdata);
143 return status;
144}
145
146static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
147{
148 struct device *dev = rtlpriv->io.dev;
149 struct usb_device *udev = to_usb_device(dev);
150 u8 request;
151 u16 wvalue;
152 u16 index;
153 __le32 *data;
154 unsigned long flags;
155
156 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
157 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
158 rtlpriv->usb_data_index = 0;
159 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
160 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
161 request = REALTEK_USB_VENQT_CMD_REQ;
162 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
163
164 wvalue = (u16)addr;
165 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
166 return le32_to_cpu(*data);
167}
168
169static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
170{
171 return (u8)_usb_read_sync(rtlpriv, addr, 1);
172}
173
174static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
175{
176 return (u16)_usb_read_sync(rtlpriv, addr, 2);
177}
178
179static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
180{
181 return _usb_read_sync(rtlpriv, addr, 4);
182}
183
184static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
185 u16 len)
186{
187 u8 request;
188 u16 wvalue;
189 u16 index;
190 __le32 data;
191
192 request = REALTEK_USB_VENQT_CMD_REQ;
193 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
194 wvalue = (u16)(addr&0x0000ffff);
195 data = cpu_to_le32(val);
196 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
197 len);
198}
199
200static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
201{
202 struct device *dev = rtlpriv->io.dev;
203
204 _usb_write_async(to_usb_device(dev), addr, val, 1);
205}
206
207static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
208{
209 struct device *dev = rtlpriv->io.dev;
210
211 _usb_write_async(to_usb_device(dev), addr, val, 2);
212}
213
214static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
215{
216 struct device *dev = rtlpriv->io.dev;
217
218 _usb_write_async(to_usb_device(dev), addr, val, 4);
219}
220
221static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
222 u16 len)
223{
224 struct device *dev = rtlpriv->io.dev;
225 struct usb_device *udev = to_usb_device(dev);
226 u8 request = REALTEK_USB_VENQT_CMD_REQ;
227 u8 reqtype = REALTEK_USB_VENQT_WRITE;
228 u16 wvalue;
229 u16 index = REALTEK_USB_VENQT_CMD_IDX;
230 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
231 u8 *buffer;
232
233 wvalue = (u16)(addr & 0x0000ffff);
234 buffer = kmemdup(data, len, GFP_ATOMIC);
235 if (!buffer)
236 return;
237 usb_control_msg(udev, pipe, request, reqtype, wvalue,
238 index, buffer, len, 50);
239
240 kfree(buffer);
241}
242
243static void _rtl_usb_io_handler_init(struct device *dev,
244 struct ieee80211_hw *hw)
245{
246 struct rtl_priv *rtlpriv = rtl_priv(hw);
247
248 rtlpriv->io.dev = dev;
249 mutex_init(&rtlpriv->io.bb_mutex);
250 rtlpriv->io.write8_async = _usb_write8_async;
251 rtlpriv->io.write16_async = _usb_write16_async;
252 rtlpriv->io.write32_async = _usb_write32_async;
253 rtlpriv->io.read8_sync = _usb_read8_sync;
254 rtlpriv->io.read16_sync = _usb_read16_sync;
255 rtlpriv->io.read32_sync = _usb_read32_sync;
256 rtlpriv->io.writeN_sync = _usb_writeN_sync;
257}
258
259static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
260{
261 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
262
263 mutex_destroy(&rtlpriv->io.bb_mutex);
264}
265
266/**
267 *
268 * Default aggregation handler. Do nothing and just return the oldest skb.
269 */
270static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
271 struct sk_buff_head *list)
272{
273 return skb_dequeue(list);
274}
275
276#define IS_HIGH_SPEED_USB(udev) \
277 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
278
279static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
280{
281 u32 i;
282 struct rtl_priv *rtlpriv = rtl_priv(hw);
283 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
284
285 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
286 ? USB_HIGH_SPEED_BULK_SIZE
287 : USB_FULL_SPEED_BULK_SIZE;
288
289 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
290 rtlusb->max_bulk_out_size);
291
292 for (i = 0; i < __RTL_TXQ_NUM; i++) {
293 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
294 if (!ep_num) {
295 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
296 "Invalid endpoint map setting!\n");
297 return -EINVAL;
298 }
299 }
300
301 rtlusb->usb_tx_post_hdl =
302 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
303 rtlusb->usb_tx_cleanup =
304 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
305 rtlusb->usb_tx_aggregate_hdl =
306 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
307 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
308 : &_none_usb_tx_aggregate_hdl;
309
310 init_usb_anchor(&rtlusb->tx_submitted);
311 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
312 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
313 init_usb_anchor(&rtlusb->tx_pending[i]);
314 }
315 return 0;
316}
317
318static void _rtl_rx_work(unsigned long param);
319
320static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
321{
322 struct rtl_priv *rtlpriv = rtl_priv(hw);
323 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
324 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
325
326 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
327 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
328 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
329 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
330 rtlusb->usb_rx_segregate_hdl =
331 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
332
333 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
334 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
335 init_usb_anchor(&rtlusb->rx_submitted);
336 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
337
338 skb_queue_head_init(&rtlusb->rx_queue);
339 rtlusb->rx_work_tasklet.func = _rtl_rx_work;
340 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
341
342 return 0;
343}
344
345static int _rtl_usb_init(struct ieee80211_hw *hw)
346{
347 struct rtl_priv *rtlpriv = rtl_priv(hw);
348 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
349 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
350 int err;
351 u8 epidx;
352 struct usb_interface *usb_intf = rtlusb->intf;
353 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
354
355 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
356 for (epidx = 0; epidx < epnums; epidx++) {
357 struct usb_endpoint_descriptor *pep_desc;
358 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
359
360 if (usb_endpoint_dir_in(pep_desc))
361 rtlusb->in_ep_nums++;
362 else if (usb_endpoint_dir_out(pep_desc))
363 rtlusb->out_ep_nums++;
364
365 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
366 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
367 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
368 pep_desc->bInterval);
369 }
370 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
371 pr_err("Too few input end points found\n");
372 return -EINVAL;
373 }
374 if (rtlusb->out_ep_nums == 0) {
375 pr_err("No output end points found\n");
376 return -EINVAL;
377 }
378 /* usb endpoint mapping */
379 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
380 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
381 _rtl_usb_init_tx(hw);
382 _rtl_usb_init_rx(hw);
383 return err;
384}
385
386static void rtl_usb_init_sw(struct ieee80211_hw *hw)
387{
388 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
389 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
390 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
391 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
392
393 rtlhal->hw = hw;
394 ppsc->inactiveps = false;
395 ppsc->leisure_ps = false;
396 ppsc->fwctrl_lps = false;
397 ppsc->reg_fwctrl_lps = 3;
398 ppsc->reg_max_lps_awakeintvl = 5;
399 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
400
401 /* IBSS */
402 mac->beacon_interval = 100;
403
404 /* AMPDU */
405 mac->min_space_cfg = 0;
406 mac->max_mss_density = 0;
407
408 /* set sane AMPDU defaults */
409 mac->current_ampdu_density = 7;
410 mac->current_ampdu_factor = 3;
411
412 /* QOS */
413 rtlusb->acm_method = EACMWAY2_SW;
414
415 /* IRQ */
416 /* HIMR - turn all on */
417 rtlusb->irq_mask[0] = 0xFFFFFFFF;
418 /* HIMR_EX - turn all on */
419 rtlusb->irq_mask[1] = 0xFFFFFFFF;
420 rtlusb->disableHWSM = true;
421}
422
423static void _rtl_rx_completed(struct urb *urb);
424
425static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
426 struct urb *urb, gfp_t gfp_mask)
427{
428 struct rtl_priv *rtlpriv = rtl_priv(hw);
429 void *buf;
430
431 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
432 &urb->transfer_dma);
433 if (!buf) {
434 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
435 "Failed to usb_alloc_coherent!!\n");
436 return -ENOMEM;
437 }
438
439 usb_fill_bulk_urb(urb, rtlusb->udev,
440 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
441 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
442 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
443
444 return 0;
445}
446
447static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
448 struct sk_buff *skb)
449{
450 struct rtl_priv *rtlpriv = rtl_priv(hw);
451 u8 *rxdesc = skb->data;
452 struct ieee80211_hdr *hdr;
453 bool unicast = false;
454 __le16 fc;
455 struct ieee80211_rx_status rx_status = {0};
456 struct rtl_stats stats = {
457 .signal = 0,
458 .rate = 0,
459 };
460
461 skb_pull(skb, RTL_RX_DESC_SIZE);
462 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
463 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
464 hdr = (struct ieee80211_hdr *)(skb->data);
465 fc = hdr->frame_control;
466 if (!stats.crc) {
467 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
468
469 if (is_broadcast_ether_addr(hdr->addr1)) {
470 /*TODO*/;
471 } else if (is_multicast_ether_addr(hdr->addr1)) {
472 /*TODO*/
473 } else {
474 unicast = true;
475 rtlpriv->stats.rxbytesunicast += skb->len;
476 }
477
478 if (ieee80211_is_data(fc)) {
479 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
480
481 if (unicast)
482 rtlpriv->link_info.num_rx_inperiod++;
483 }
484 /* static bcn for roaming */
485 rtl_beacon_statistic(hw, skb);
486 }
487}
488
489static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
490 struct sk_buff *skb)
491{
492 struct rtl_priv *rtlpriv = rtl_priv(hw);
493 u8 *rxdesc = skb->data;
494 struct ieee80211_hdr *hdr;
495 bool unicast = false;
496 __le16 fc;
497 struct ieee80211_rx_status rx_status = {0};
498 struct rtl_stats stats = {
499 .signal = 0,
500 .rate = 0,
501 };
502
503 skb_pull(skb, RTL_RX_DESC_SIZE);
504 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
505 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
506 hdr = (struct ieee80211_hdr *)(skb->data);
507 fc = hdr->frame_control;
508 if (!stats.crc) {
509 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
510
511 if (is_broadcast_ether_addr(hdr->addr1)) {
512 /*TODO*/;
513 } else if (is_multicast_ether_addr(hdr->addr1)) {
514 /*TODO*/
515 } else {
516 unicast = true;
517 rtlpriv->stats.rxbytesunicast += skb->len;
518 }
519
520 if (ieee80211_is_data(fc)) {
521 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
522
523 if (unicast)
524 rtlpriv->link_info.num_rx_inperiod++;
525 }
526
527 /* static bcn for roaming */
528 rtl_beacon_statistic(hw, skb);
529
530 if (likely(rtl_action_proc(hw, skb, false)))
531 ieee80211_rx(hw, skb);
532 else
533 dev_kfree_skb_any(skb);
534 }
535}
536
537static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
538{
539 struct sk_buff *_skb;
540 struct sk_buff_head rx_queue;
541 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
542
543 skb_queue_head_init(&rx_queue);
544 if (rtlusb->usb_rx_segregate_hdl)
545 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
546 WARN_ON(skb_queue_empty(&rx_queue));
547 while (!skb_queue_empty(&rx_queue)) {
548 _skb = skb_dequeue(&rx_queue);
549 _rtl_usb_rx_process_agg(hw, _skb);
550 ieee80211_rx(hw, _skb);
551 }
552}
553
554#define __RX_SKB_MAX_QUEUED 64
555
556static void _rtl_rx_work(unsigned long param)
557{
558 struct rtl_usb *rtlusb = (struct rtl_usb *)param;
559 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
560 struct sk_buff *skb;
561
562 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
563 if (unlikely(IS_USB_STOP(rtlusb))) {
564 dev_kfree_skb_any(skb);
565 continue;
566 }
567
568 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
569 _rtl_usb_rx_process_noagg(hw, skb);
570 } else {
571 /* TO DO */
572 _rtl_rx_pre_process(hw, skb);
573 pr_err("rx agg not supported\n");
574 }
575 }
576}
577
578static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
579 unsigned int len)
580{
581#if NET_IP_ALIGN != 0
582 unsigned int padding = 0;
583#endif
584
585 /* make function no-op when possible */
586 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
587 return 0;
588
589#if NET_IP_ALIGN != 0
590 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
591 /* TODO: deduplicate common code, define helper function instead? */
592
593 if (ieee80211_is_data_qos(hdr->frame_control)) {
594 u8 *qc = ieee80211_get_qos_ctl(hdr);
595
596 padding ^= NET_IP_ALIGN;
597
598 /* Input might be invalid, avoid accessing memory outside
599 * the buffer.
600 */
601 if ((unsigned long)qc - (unsigned long)hdr < len &&
602 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
603 padding ^= NET_IP_ALIGN;
604 }
605
606 if (ieee80211_has_a4(hdr->frame_control))
607 padding ^= NET_IP_ALIGN;
608
609 return padding;
610#endif
611}
612
613#define __RADIO_TAP_SIZE_RSV 32
614
615static void _rtl_rx_completed(struct urb *_urb)
616{
617 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
618 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
619 struct rtl_priv *rtlpriv = rtl_priv(hw);
620 int err = 0;
621
622 if (unlikely(IS_USB_STOP(rtlusb)))
623 goto free;
624
625 if (likely(0 == _urb->status)) {
626 unsigned int padding;
627 struct sk_buff *skb;
628 unsigned int qlen;
629 unsigned int size = _urb->actual_length;
630 struct ieee80211_hdr *hdr;
631
632 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
633 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
634 "Too short packet from bulk IN! (len: %d)\n",
635 size);
636 goto resubmit;
637 }
638
639 qlen = skb_queue_len(&rtlusb->rx_queue);
640 if (qlen >= __RX_SKB_MAX_QUEUED) {
641 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
642 "Pending RX skbuff queue full! (qlen: %d)\n",
643 qlen);
644 goto resubmit;
645 }
646
647 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
648 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
649
650 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
651 if (!skb) {
652 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
653 "Can't allocate skb for bulk IN!\n");
654 goto resubmit;
655 }
656
657 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
658
659 /* Make sure the payload data is 4 byte aligned. */
660 skb_reserve(skb, padding);
661
662 /* reserve some space for mac80211's radiotap */
663 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
664
665 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
666
667 skb_queue_tail(&rtlusb->rx_queue, skb);
668 tasklet_schedule(&rtlusb->rx_work_tasklet);
669
670 goto resubmit;
671 }
672
673 switch (_urb->status) {
674 /* disconnect */
675 case -ENOENT:
676 case -ECONNRESET:
677 case -ENODEV:
678 case -ESHUTDOWN:
679 goto free;
680 default:
681 break;
682 }
683
684resubmit:
685 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
686 err = usb_submit_urb(_urb, GFP_ATOMIC);
687 if (unlikely(err)) {
688 usb_unanchor_urb(_urb);
689 goto free;
690 }
691 return;
692
693free:
694 /* On some architectures, usb_free_coherent must not be called from
695 * hardirq context. Queue urb to cleanup list.
696 */
697 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
698}
699
700#undef __RADIO_TAP_SIZE_RSV
701
702static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
703{
704 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
705 struct urb *urb;
706
707 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
708
709 tasklet_kill(&rtlusb->rx_work_tasklet);
710 skb_queue_purge(&rtlusb->rx_queue);
711
712 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
713 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
714 urb->transfer_buffer, urb->transfer_dma);
715 usb_free_urb(urb);
716 }
717}
718
719static int _rtl_usb_receive(struct ieee80211_hw *hw)
720{
721 struct urb *urb;
722 int err;
723 int i;
724 struct rtl_priv *rtlpriv = rtl_priv(hw);
725 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
726
727 WARN_ON(0 == rtlusb->rx_urb_num);
728 /* 1600 == 1514 + max WLAN header + rtk info */
729 WARN_ON(rtlusb->rx_max_size < 1600);
730
731 for (i = 0; i < rtlusb->rx_urb_num; i++) {
732 err = -ENOMEM;
733 urb = usb_alloc_urb(0, GFP_KERNEL);
734 if (!urb) {
735 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
736 "Failed to alloc URB!!\n");
737 goto err_out;
738 }
739
740 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
741 if (err < 0) {
742 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
743 "Failed to prep_rx_urb!!\n");
744 usb_free_urb(urb);
745 goto err_out;
746 }
747
748 usb_anchor_urb(urb, &rtlusb->rx_submitted);
749 err = usb_submit_urb(urb, GFP_KERNEL);
750 if (err)
751 goto err_out;
752 usb_free_urb(urb);
753 }
754 return 0;
755
756err_out:
757 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
758 _rtl_usb_cleanup_rx(hw);
759 return err;
760}
761
762static int rtl_usb_start(struct ieee80211_hw *hw)
763{
764 int err;
765 struct rtl_priv *rtlpriv = rtl_priv(hw);
766 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
767 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
768
769 err = rtlpriv->cfg->ops->hw_init(hw);
770 if (!err) {
771 rtl_init_rx_config(hw);
772
773 /* Enable software */
774 SET_USB_START(rtlusb);
775 /* should after adapter start and interrupt enable. */
776 set_hal_start(rtlhal);
777
778 /* Start bulk IN */
779 err = _rtl_usb_receive(hw);
780 }
781
782 return err;
783}
784/**
785 *
786 *
787 */
788
789/*======================= tx =========================================*/
790static void rtl_usb_cleanup(struct ieee80211_hw *hw)
791{
792 u32 i;
793 struct sk_buff *_skb;
794 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
795 struct ieee80211_tx_info *txinfo;
796
797 SET_USB_STOP(rtlusb);
798
799 /* clean up rx stuff. */
800 _rtl_usb_cleanup_rx(hw);
801
802 /* clean up tx stuff */
803 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
804 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
805 rtlusb->usb_tx_cleanup(hw, _skb);
806 txinfo = IEEE80211_SKB_CB(_skb);
807 ieee80211_tx_info_clear_status(txinfo);
808 txinfo->flags |= IEEE80211_TX_STAT_ACK;
809 ieee80211_tx_status_irqsafe(hw, _skb);
810 }
811 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
812 }
813 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
814}
815
816/**
817 *
818 * We may add some struct into struct rtl_usb later. Do deinit here.
819 *
820 */
821static void rtl_usb_deinit(struct ieee80211_hw *hw)
822{
823 rtl_usb_cleanup(hw);
824}
825
826static void rtl_usb_stop(struct ieee80211_hw *hw)
827{
828 struct rtl_priv *rtlpriv = rtl_priv(hw);
829 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
830 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
831
832 /* should after adapter start and interrupt enable. */
833 set_hal_stop(rtlhal);
834 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
835 /* Enable software */
836 SET_USB_STOP(rtlusb);
837 rtl_usb_deinit(hw);
838 rtlpriv->cfg->ops->hw_disable(hw);
839}
840
841static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
842{
843 int err;
844 struct rtl_priv *rtlpriv = rtl_priv(hw);
845 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
846
847 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
848 err = usb_submit_urb(_urb, GFP_ATOMIC);
849 if (err < 0) {
850 struct sk_buff *skb;
851
852 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
853 "Failed to submit urb\n");
854 usb_unanchor_urb(_urb);
855 skb = (struct sk_buff *)_urb->context;
856 kfree_skb(skb);
857 }
858 usb_free_urb(_urb);
859}
860
861static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
862 struct sk_buff *skb)
863{
864 struct rtl_priv *rtlpriv = rtl_priv(hw);
865 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
866 struct ieee80211_tx_info *txinfo;
867
868 rtlusb->usb_tx_post_hdl(hw, urb, skb);
869 skb_pull(skb, RTL_TX_HEADER_SIZE);
870 txinfo = IEEE80211_SKB_CB(skb);
871 ieee80211_tx_info_clear_status(txinfo);
872 txinfo->flags |= IEEE80211_TX_STAT_ACK;
873
874 if (urb->status) {
875 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
876 "Urb has error status 0x%X\n", urb->status);
877 goto out;
878 }
879 /* TODO: statistics */
880out:
881 ieee80211_tx_status_irqsafe(hw, skb);
882 return urb->status;
883}
884
885static void _rtl_tx_complete(struct urb *urb)
886{
887 struct sk_buff *skb = (struct sk_buff *)urb->context;
888 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
889 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
890 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
891 int err;
892
893 if (unlikely(IS_USB_STOP(rtlusb)))
894 return;
895 err = _usb_tx_post(hw, urb, skb);
896 if (err) {
897 /* Ignore error and keep issuiing other urbs */
898 return;
899 }
900}
901
902static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
903 struct sk_buff *skb, u32 ep_num)
904{
905 struct rtl_priv *rtlpriv = rtl_priv(hw);
906 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
907 struct urb *_urb;
908
909 WARN_ON(NULL == skb);
910 _urb = usb_alloc_urb(0, GFP_ATOMIC);
911 if (!_urb) {
912 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
913 "Can't allocate URB for bulk out!\n");
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_priv *rtlpriv = rtl_priv(hw);
928 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
929 u32 ep_num;
930 struct urb *_urb = NULL;
931 struct sk_buff *_skb = NULL;
932
933 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
934 if (unlikely(IS_USB_STOP(rtlusb))) {
935 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
936 "USB device is stopping...\n");
937 kfree_skb(skb);
938 return;
939 }
940 ep_num = rtlusb->ep_map.ep_mapping[qnum];
941 _skb = skb;
942 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
943 if (unlikely(!_urb)) {
944 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
945 "Can't allocate urb. Drop skb!\n");
946 kfree_skb(skb);
947 return;
948 }
949 _rtl_submit_tx_urb(hw, _urb);
950}
951
952static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
953 struct ieee80211_sta *sta,
954 struct sk_buff *skb,
955 u16 hw_queue)
956{
957 struct rtl_priv *rtlpriv = rtl_priv(hw);
958 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
959 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
960 struct rtl_tx_desc *pdesc = NULL;
961 struct rtl_tcb_desc tcb_desc;
962 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
963 __le16 fc = hdr->frame_control;
964 u8 *pda_addr = hdr->addr1;
965 /* ssn */
966 u8 *qc = NULL;
967 u8 tid = 0;
968 u16 seq_number = 0;
969
970 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
971 if (ieee80211_is_auth(fc)) {
972 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
973 rtl_ips_nic_on(hw);
974 }
975
976 if (rtlpriv->psc.sw_ps_enabled) {
977 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
978 !ieee80211_has_pm(fc))
979 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
980 }
981
982 rtl_action_proc(hw, skb, true);
983 if (is_multicast_ether_addr(pda_addr))
984 rtlpriv->stats.txbytesmulticast += skb->len;
985 else if (is_broadcast_ether_addr(pda_addr))
986 rtlpriv->stats.txbytesbroadcast += skb->len;
987 else
988 rtlpriv->stats.txbytesunicast += skb->len;
989 if (ieee80211_is_data_qos(fc)) {
990 qc = ieee80211_get_qos_ctl(hdr);
991 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
992 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
993 IEEE80211_SCTL_SEQ) >> 4;
994 seq_number += 1;
995 seq_number <<= 4;
996 }
997 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
998 hw_queue, &tcb_desc);
999 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1000 if (qc)
1001 mac->tids[tid].seq_number = seq_number;
1002 }
1003 if (ieee80211_is_data(fc))
1004 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1005}
1006
1007static int rtl_usb_tx(struct ieee80211_hw *hw,
1008 struct ieee80211_sta *sta,
1009 struct sk_buff *skb,
1010 struct rtl_tcb_desc *dummy)
1011{
1012 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1013 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1014 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1015 __le16 fc = hdr->frame_control;
1016 u16 hw_queue;
1017
1018 if (unlikely(is_hal_stop(rtlhal)))
1019 goto err_free;
1020 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1021 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1022 _rtl_usb_transmit(hw, skb, hw_queue);
1023 return NETDEV_TX_OK;
1024
1025err_free:
1026 dev_kfree_skb_any(skb);
1027 return NETDEV_TX_OK;
1028}
1029
1030static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1031 struct ieee80211_sta *sta,
1032 struct sk_buff *skb)
1033{
1034 return false;
1035}
1036
1037static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1038{
1039 struct rtl_works *rtlworks =
1040 container_of(work, struct rtl_works, fill_h2c_cmd);
1041 struct ieee80211_hw *hw = rtlworks->hw;
1042 struct rtl_priv *rtlpriv = rtl_priv(hw);
1043
1044 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1045}
1046
1047static struct rtl_intf_ops rtl_usb_ops = {
1048 .adapter_start = rtl_usb_start,
1049 .adapter_stop = rtl_usb_stop,
1050 .adapter_tx = rtl_usb_tx,
1051 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1052};
1053
1054int rtl_usb_probe(struct usb_interface *intf,
1055 const struct usb_device_id *id,
1056 struct rtl_hal_cfg *rtl_hal_cfg)
1057{
1058 int err;
1059 struct ieee80211_hw *hw = NULL;
1060 struct rtl_priv *rtlpriv = NULL;
1061 struct usb_device *udev;
1062 struct rtl_usb_priv *usb_priv;
1063
1064 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1065 sizeof(struct rtl_usb_priv), &rtl_ops);
1066 if (!hw) {
1067 RT_ASSERT(false, "ieee80211 alloc failed\n");
1068 return -ENOMEM;
1069 }
1070 rtlpriv = hw->priv;
1071 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1072 GFP_KERNEL);
1073 if (!rtlpriv->usb_data)
1074 return -ENOMEM;
1075
1076 /* this spin lock must be initialized early */
1077 spin_lock_init(&rtlpriv->locks.usb_lock);
1078 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1079 rtl_fill_h2c_cmd_work_callback);
1080 INIT_WORK(&rtlpriv->works.lps_change_work,
1081 rtl_lps_change_work_callback);
1082
1083 rtlpriv->usb_data_index = 0;
1084 init_completion(&rtlpriv->firmware_loading_complete);
1085 SET_IEEE80211_DEV(hw, &intf->dev);
1086 udev = interface_to_usbdev(intf);
1087 usb_get_dev(udev);
1088 usb_priv = rtl_usbpriv(hw);
1089 memset(usb_priv, 0, sizeof(*usb_priv));
1090 usb_priv->dev.intf = intf;
1091 usb_priv->dev.udev = udev;
1092 usb_set_intfdata(intf, hw);
1093 /* init cfg & intf_ops */
1094 rtlpriv->rtlhal.interface = INTF_USB;
1095 rtlpriv->cfg = rtl_hal_cfg;
1096 rtlpriv->intf_ops = &rtl_usb_ops;
1097 rtl_dbgp_flag_init(hw);
1098 /* Init IO handler */
1099 _rtl_usb_io_handler_init(&udev->dev, hw);
1100 rtlpriv->cfg->ops->read_chip_version(hw);
1101 /*like read eeprom and so on */
1102 rtlpriv->cfg->ops->read_eeprom_info(hw);
1103 err = _rtl_usb_init(hw);
1104 if (err)
1105 goto error_out;
1106 rtl_usb_init_sw(hw);
1107 /* Init mac80211 sw */
1108 err = rtl_init_core(hw);
1109 if (err) {
1110 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1111 "Can't allocate sw for mac80211\n");
1112 goto error_out;
1113 }
1114 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1115 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1116 goto error_out;
1117 }
1118 rtlpriv->cfg->ops->init_sw_leds(hw);
1119
1120 return 0;
1121error_out:
1122 rtl_deinit_core(hw);
1123 _rtl_usb_io_handler_release(hw);
1124 usb_put_dev(udev);
1125 complete(&rtlpriv->firmware_loading_complete);
1126 return -ENODEV;
1127}
1128EXPORT_SYMBOL(rtl_usb_probe);
1129
1130void rtl_usb_disconnect(struct usb_interface *intf)
1131{
1132 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1133 struct rtl_priv *rtlpriv = rtl_priv(hw);
1134 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1135 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1136
1137 if (unlikely(!rtlpriv))
1138 return;
1139
1140 /* just in case driver is removed before firmware callback */
1141 wait_for_completion(&rtlpriv->firmware_loading_complete);
1142 /*ieee80211_unregister_hw will call ops_stop */
1143 if (rtlmac->mac80211_registered == 1) {
1144 ieee80211_unregister_hw(hw);
1145 rtlmac->mac80211_registered = 0;
1146 } else {
1147 rtl_deinit_deferred_work(hw);
1148 rtlpriv->intf_ops->adapter_stop(hw);
1149 }
1150 /*deinit rfkill */
1151 /* rtl_deinit_rfkill(hw); */
1152 rtl_usb_deinit(hw);
1153 rtl_deinit_core(hw);
1154 kfree(rtlpriv->usb_data);
1155 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1156 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1157 _rtl_usb_io_handler_release(hw);
1158 usb_put_dev(rtlusb->udev);
1159 usb_set_intfdata(intf, NULL);
1160 ieee80211_free_hw(hw);
1161}
1162EXPORT_SYMBOL(rtl_usb_disconnect);
1163
1164int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1165{
1166 return 0;
1167}
1168EXPORT_SYMBOL(rtl_usb_suspend);
1169
1170int rtl_usb_resume(struct usb_interface *pusb_intf)
1171{
1172 return 0;
1173}
1174EXPORT_SYMBOL(rtl_usb_resume);