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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / net / wireless / rtlwifi / usb.c
blob832560aa227446c61f4ef300a5271226efd0b40a
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
37 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
38 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
39 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
40 MODULE_LICENSE("GPL");
41 MODULE_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
50 static 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
60 static 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
114 static 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, 1000);
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
146 static 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
169 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
170 {
171 return (u8)_usb_read_sync(rtlpriv, addr, 1);
172 }
173
174 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
175 {
176 return (u16)_usb_read_sync(rtlpriv, addr, 2);
177 }
178
179 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
180 {
181 return _usb_read_sync(rtlpriv, addr, 4);
182 }
183
184 static 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
200 static 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
207 static 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
214 static 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
221 static 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
243 static 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
259 static 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 */
270 static 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
279 static 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
318 static void _rtl_rx_work(unsigned long param);
319
320 static 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
345 static 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
386 static 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
423 static void _rtl_rx_completed(struct urb *urb);
424
425 static 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
447 static 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 .noise = -98,
459 .rate = 0,
460 };
461
462 skb_pull(skb, RTL_RX_DESC_SIZE);
463 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
464 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
465 hdr = (struct ieee80211_hdr *)(skb->data);
466 fc = hdr->frame_control;
467 if (!stats.crc) {
468 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
469
470 if (is_broadcast_ether_addr(hdr->addr1)) {
471 /*TODO*/;
472 } else if (is_multicast_ether_addr(hdr->addr1)) {
473 /*TODO*/
474 } else {
475 unicast = true;
476 rtlpriv->stats.rxbytesunicast += skb->len;
477 }
478
479 rtl_is_special_data(hw, skb, false);
480
481 if (ieee80211_is_data(fc)) {
482 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
483
484 if (unicast)
485 rtlpriv->link_info.num_rx_inperiod++;
486 }
487 /* static bcn for roaming */
488 rtl_beacon_statistic(hw, skb);
489 }
490 }
491
492 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
493 struct sk_buff *skb)
494 {
495 struct rtl_priv *rtlpriv = rtl_priv(hw);
496 u8 *rxdesc = skb->data;
497 struct ieee80211_hdr *hdr;
498 bool unicast = false;
499 __le16 fc;
500 struct ieee80211_rx_status rx_status = {0};
501 struct rtl_stats stats = {
502 .signal = 0,
503 .noise = -98,
504 .rate = 0,
505 };
506
507 skb_pull(skb, RTL_RX_DESC_SIZE);
508 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
509 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
510 hdr = (struct ieee80211_hdr *)(skb->data);
511 fc = hdr->frame_control;
512 if (!stats.crc) {
513 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
514
515 if (is_broadcast_ether_addr(hdr->addr1)) {
516 /*TODO*/;
517 } else if (is_multicast_ether_addr(hdr->addr1)) {
518 /*TODO*/
519 } else {
520 unicast = true;
521 rtlpriv->stats.rxbytesunicast += skb->len;
522 }
523
524 rtl_is_special_data(hw, skb, false);
525
526 if (ieee80211_is_data(fc)) {
527 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
528
529 if (unicast)
530 rtlpriv->link_info.num_rx_inperiod++;
531 }
532
533 /* static bcn for roaming */
534 rtl_beacon_statistic(hw, skb);
535
536 if (likely(rtl_action_proc(hw, skb, false)))
537 ieee80211_rx(hw, skb);
538 else
539 dev_kfree_skb_any(skb);
540 }
541 }
542
543 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
544 {
545 struct sk_buff *_skb;
546 struct sk_buff_head rx_queue;
547 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
548
549 skb_queue_head_init(&rx_queue);
550 if (rtlusb->usb_rx_segregate_hdl)
551 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
552 WARN_ON(skb_queue_empty(&rx_queue));
553 while (!skb_queue_empty(&rx_queue)) {
554 _skb = skb_dequeue(&rx_queue);
555 _rtl_usb_rx_process_agg(hw, _skb);
556 ieee80211_rx(hw, _skb);
557 }
558 }
559
560 #define __RX_SKB_MAX_QUEUED 64
561
562 static void _rtl_rx_work(unsigned long param)
563 {
564 struct rtl_usb *rtlusb = (struct rtl_usb *)param;
565 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
566 struct sk_buff *skb;
567
568 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
569 if (unlikely(IS_USB_STOP(rtlusb))) {
570 dev_kfree_skb_any(skb);
571 continue;
572 }
573
574 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
575 _rtl_usb_rx_process_noagg(hw, skb);
576 } else {
577 /* TO DO */
578 _rtl_rx_pre_process(hw, skb);
579 pr_err("rx agg not supported\n");
580 }
581 }
582 }
583
584 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
585 unsigned int len)
586 {
587 unsigned int padding = 0;
588
589 /* make function no-op when possible */
590 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
591 return 0;
592
593 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
594 /* TODO: deduplicate common code, define helper function instead? */
595
596 if (ieee80211_is_data_qos(hdr->frame_control)) {
597 u8 *qc = ieee80211_get_qos_ctl(hdr);
598
599 padding ^= NET_IP_ALIGN;
600
601 /* Input might be invalid, avoid accessing memory outside
602 * the buffer.
603 */
604 if ((unsigned long)qc - (unsigned long)hdr < len &&
605 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
606 padding ^= NET_IP_ALIGN;
607 }
608
609 if (ieee80211_has_a4(hdr->frame_control))
610 padding ^= NET_IP_ALIGN;
611
612 return padding;
613 }
614
615 #define __RADIO_TAP_SIZE_RSV 32
616
617 static void _rtl_rx_completed(struct urb *_urb)
618 {
619 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
620 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
621 struct rtl_priv *rtlpriv = rtl_priv(hw);
622 int err = 0;
623
624 if (unlikely(IS_USB_STOP(rtlusb)))
625 goto free;
626
627 if (likely(0 == _urb->status)) {
628 unsigned int padding;
629 struct sk_buff *skb;
630 unsigned int qlen;
631 unsigned int size = _urb->actual_length;
632 struct ieee80211_hdr *hdr;
633
634 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
635 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
636 "Too short packet from bulk IN! (len: %d)\n",
637 size);
638 goto resubmit;
639 }
640
641 qlen = skb_queue_len(&rtlusb->rx_queue);
642 if (qlen >= __RX_SKB_MAX_QUEUED) {
643 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
644 "Pending RX skbuff queue full! (qlen: %d)\n",
645 qlen);
646 goto resubmit;
647 }
648
649 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
650 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
651
652 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
653 if (!skb) {
654 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
655 "Can't allocate skb for bulk IN!\n");
656 goto resubmit;
657 }
658
659 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
660
661 /* Make sure the payload data is 4 byte aligned. */
662 skb_reserve(skb, padding);
663
664 /* reserve some space for mac80211's radiotap */
665 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
666
667 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
668
669 skb_queue_tail(&rtlusb->rx_queue, skb);
670 tasklet_schedule(&rtlusb->rx_work_tasklet);
671
672 goto resubmit;
673 }
674
675 switch (_urb->status) {
676 /* disconnect */
677 case -ENOENT:
678 case -ECONNRESET:
679 case -ENODEV:
680 case -ESHUTDOWN:
681 goto free;
682 default:
683 break;
684 }
685
686 resubmit:
687 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
688 err = usb_submit_urb(_urb, GFP_ATOMIC);
689 if (unlikely(err)) {
690 usb_unanchor_urb(_urb);
691 goto free;
692 }
693 return;
694
695 free:
696 /* On some architectures, usb_free_coherent must not be called from
697 * hardirq context. Queue urb to cleanup list.
698 */
699 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
700 }
701
702 #undef __RADIO_TAP_SIZE_RSV
703
704 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
705 {
706 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
707 struct urb *urb;
708
709 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
710
711 tasklet_kill(&rtlusb->rx_work_tasklet);
712 skb_queue_purge(&rtlusb->rx_queue);
713
714 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
715 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
716 urb->transfer_buffer, urb->transfer_dma);
717 usb_free_urb(urb);
718 }
719 }
720
721 static int _rtl_usb_receive(struct ieee80211_hw *hw)
722 {
723 struct urb *urb;
724 int err;
725 int i;
726 struct rtl_priv *rtlpriv = rtl_priv(hw);
727 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
728
729 WARN_ON(0 == rtlusb->rx_urb_num);
730 /* 1600 == 1514 + max WLAN header + rtk info */
731 WARN_ON(rtlusb->rx_max_size < 1600);
732
733 for (i = 0; i < rtlusb->rx_urb_num; i++) {
734 err = -ENOMEM;
735 urb = usb_alloc_urb(0, GFP_KERNEL);
736 if (!urb) {
737 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
738 "Failed to alloc URB!!\n");
739 goto err_out;
740 }
741
742 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
743 if (err < 0) {
744 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
745 "Failed to prep_rx_urb!!\n");
746 usb_free_urb(urb);
747 goto err_out;
748 }
749
750 usb_anchor_urb(urb, &rtlusb->rx_submitted);
751 err = usb_submit_urb(urb, GFP_KERNEL);
752 if (err)
753 goto err_out;
754 usb_free_urb(urb);
755 }
756 return 0;
757
758 err_out:
759 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
760 _rtl_usb_cleanup_rx(hw);
761 return err;
762 }
763
764 static int rtl_usb_start(struct ieee80211_hw *hw)
765 {
766 int err;
767 struct rtl_priv *rtlpriv = rtl_priv(hw);
768 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
769 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
770
771 err = rtlpriv->cfg->ops->hw_init(hw);
772 if (!err) {
773 rtl_init_rx_config(hw);
774
775 /* Enable software */
776 SET_USB_START(rtlusb);
777 /* should after adapter start and interrupt enable. */
778 set_hal_start(rtlhal);
779
780 /* Start bulk IN */
781 err = _rtl_usb_receive(hw);
782 }
783
784 return err;
785 }
786 /**
787 *
788 *
789 */
790
791 /*======================= tx =========================================*/
792 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
793 {
794 u32 i;
795 struct sk_buff *_skb;
796 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
797 struct ieee80211_tx_info *txinfo;
798
799 SET_USB_STOP(rtlusb);
800
801 /* clean up rx stuff. */
802 _rtl_usb_cleanup_rx(hw);
803
804 /* clean up tx stuff */
805 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
806 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
807 rtlusb->usb_tx_cleanup(hw, _skb);
808 txinfo = IEEE80211_SKB_CB(_skb);
809 ieee80211_tx_info_clear_status(txinfo);
810 txinfo->flags |= IEEE80211_TX_STAT_ACK;
811 ieee80211_tx_status_irqsafe(hw, _skb);
812 }
813 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
814 }
815 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
816 }
817
818 /**
819 *
820 * We may add some struct into struct rtl_usb later. Do deinit here.
821 *
822 */
823 static void rtl_usb_deinit(struct ieee80211_hw *hw)
824 {
825 rtl_usb_cleanup(hw);
826 }
827
828 static void rtl_usb_stop(struct ieee80211_hw *hw)
829 {
830 struct rtl_priv *rtlpriv = rtl_priv(hw);
831 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
832 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
833
834 /* should after adapter start and interrupt enable. */
835 set_hal_stop(rtlhal);
836 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
837 /* Enable software */
838 SET_USB_STOP(rtlusb);
839 rtl_usb_deinit(hw);
840 rtlpriv->cfg->ops->hw_disable(hw);
841 }
842
843 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
844 {
845 int err;
846 struct rtl_priv *rtlpriv = rtl_priv(hw);
847 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
848
849 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
850 err = usb_submit_urb(_urb, GFP_ATOMIC);
851 if (err < 0) {
852 struct sk_buff *skb;
853
854 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
855 "Failed to submit urb\n");
856 usb_unanchor_urb(_urb);
857 skb = (struct sk_buff *)_urb->context;
858 kfree_skb(skb);
859 }
860 usb_free_urb(_urb);
861 }
862
863 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
864 struct sk_buff *skb)
865 {
866 struct rtl_priv *rtlpriv = rtl_priv(hw);
867 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
868 struct ieee80211_tx_info *txinfo;
869
870 rtlusb->usb_tx_post_hdl(hw, urb, skb);
871 skb_pull(skb, RTL_TX_HEADER_SIZE);
872 txinfo = IEEE80211_SKB_CB(skb);
873 ieee80211_tx_info_clear_status(txinfo);
874 txinfo->flags |= IEEE80211_TX_STAT_ACK;
875
876 if (urb->status) {
877 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
878 "Urb has error status 0x%X\n", urb->status);
879 goto out;
880 }
881 /* TODO: statistics */
882 out:
883 ieee80211_tx_status_irqsafe(hw, skb);
884 return urb->status;
885 }
886
887 static void _rtl_tx_complete(struct urb *urb)
888 {
889 struct sk_buff *skb = (struct sk_buff *)urb->context;
890 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
891 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
892 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
893 int err;
894
895 if (unlikely(IS_USB_STOP(rtlusb)))
896 return;
897 err = _usb_tx_post(hw, urb, skb);
898 if (err) {
899 /* Ignore error and keep issuiing other urbs */
900 return;
901 }
902 }
903
904 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
905 struct sk_buff *skb, u32 ep_num)
906 {
907 struct rtl_priv *rtlpriv = rtl_priv(hw);
908 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
909 struct urb *_urb;
910
911 WARN_ON(NULL == skb);
912 _urb = usb_alloc_urb(0, GFP_ATOMIC);
913 if (!_urb) {
914 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
915 "Can't allocate URB for bulk out!\n");
916 kfree_skb(skb);
917 return NULL;
918 }
919 _rtl_install_trx_info(rtlusb, skb, ep_num);
920 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
921 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
922 _urb->transfer_flags |= URB_ZERO_PACKET;
923 return _urb;
924 }
925
926 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
927 enum rtl_txq qnum)
928 {
929 struct rtl_priv *rtlpriv = rtl_priv(hw);
930 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
931 u32 ep_num;
932 struct urb *_urb = NULL;
933 struct sk_buff *_skb = NULL;
934
935 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
936 if (unlikely(IS_USB_STOP(rtlusb))) {
937 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
938 "USB device is stopping...\n");
939 kfree_skb(skb);
940 return;
941 }
942 ep_num = rtlusb->ep_map.ep_mapping[qnum];
943 _skb = skb;
944 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
945 if (unlikely(!_urb)) {
946 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
947 "Can't allocate urb. Drop skb!\n");
948 kfree_skb(skb);
949 return;
950 }
951 _rtl_submit_tx_urb(hw, _urb);
952 }
953
954 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
955 struct ieee80211_sta *sta,
956 struct sk_buff *skb,
957 u16 hw_queue)
958 {
959 struct rtl_priv *rtlpriv = rtl_priv(hw);
960 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
961 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
962 struct rtl_tx_desc *pdesc = NULL;
963 struct rtl_tcb_desc tcb_desc;
964 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
965 __le16 fc = hdr->frame_control;
966 u8 *pda_addr = hdr->addr1;
967 /* ssn */
968 u8 *qc = NULL;
969 u8 tid = 0;
970 u16 seq_number = 0;
971
972 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
973 if (ieee80211_is_auth(fc)) {
974 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
975 rtl_ips_nic_on(hw);
976 }
977
978 if (rtlpriv->psc.sw_ps_enabled) {
979 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
980 !ieee80211_has_pm(fc))
981 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
982 }
983
984 rtl_action_proc(hw, skb, true);
985 if (is_multicast_ether_addr(pda_addr))
986 rtlpriv->stats.txbytesmulticast += skb->len;
987 else if (is_broadcast_ether_addr(pda_addr))
988 rtlpriv->stats.txbytesbroadcast += skb->len;
989 else
990 rtlpriv->stats.txbytesunicast += skb->len;
991 if (ieee80211_is_data_qos(fc)) {
992 qc = ieee80211_get_qos_ctl(hdr);
993 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
994 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
995 IEEE80211_SCTL_SEQ) >> 4;
996 seq_number += 1;
997 seq_number <<= 4;
998 }
999 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
1000 hw_queue, &tcb_desc);
1001 if (!ieee80211_has_morefrags(hdr->frame_control)) {
1002 if (qc)
1003 mac->tids[tid].seq_number = seq_number;
1004 }
1005 if (ieee80211_is_data(fc))
1006 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1007 }
1008
1009 static int rtl_usb_tx(struct ieee80211_hw *hw,
1010 struct ieee80211_sta *sta,
1011 struct sk_buff *skb,
1012 struct rtl_tcb_desc *dummy)
1013 {
1014 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1015 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1016 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1017 __le16 fc = hdr->frame_control;
1018 u16 hw_queue;
1019
1020 if (unlikely(is_hal_stop(rtlhal)))
1021 goto err_free;
1022 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1023 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1024 _rtl_usb_transmit(hw, skb, hw_queue);
1025 return NETDEV_TX_OK;
1026
1027 err_free:
1028 dev_kfree_skb_any(skb);
1029 return NETDEV_TX_OK;
1030 }
1031
1032 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1033 struct ieee80211_sta *sta,
1034 struct sk_buff *skb)
1035 {
1036 return false;
1037 }
1038
1039 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1040 {
1041 struct rtl_works *rtlworks =
1042 container_of(work, struct rtl_works, fill_h2c_cmd);
1043 struct ieee80211_hw *hw = rtlworks->hw;
1044 struct rtl_priv *rtlpriv = rtl_priv(hw);
1045
1046 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1047 }
1048
1049 static struct rtl_intf_ops rtl_usb_ops = {
1050 .adapter_start = rtl_usb_start,
1051 .adapter_stop = rtl_usb_stop,
1052 .adapter_tx = rtl_usb_tx,
1053 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1054 };
1055
1056 int rtl_usb_probe(struct usb_interface *intf,
1057 const struct usb_device_id *id,
1058 struct rtl_hal_cfg *rtl_hal_cfg)
1059 {
1060 int err;
1061 struct ieee80211_hw *hw = NULL;
1062 struct rtl_priv *rtlpriv = NULL;
1063 struct usb_device *udev;
1064 struct rtl_usb_priv *usb_priv;
1065
1066 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1067 sizeof(struct rtl_usb_priv), &rtl_ops);
1068 if (!hw) {
1069 RT_ASSERT(false, "ieee80211 alloc failed\n");
1070 return -ENOMEM;
1071 }
1072 rtlpriv = hw->priv;
1073 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1074 GFP_KERNEL);
1075 if (!rtlpriv->usb_data)
1076 return -ENOMEM;
1077
1078 /* this spin lock must be initialized early */
1079 spin_lock_init(&rtlpriv->locks.usb_lock);
1080 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1081 rtl_fill_h2c_cmd_work_callback);
1082 INIT_WORK(&rtlpriv->works.lps_change_work,
1083 rtl_lps_change_work_callback);
1084
1085 rtlpriv->usb_data_index = 0;
1086 init_completion(&rtlpriv->firmware_loading_complete);
1087 SET_IEEE80211_DEV(hw, &intf->dev);
1088 udev = interface_to_usbdev(intf);
1089 usb_get_dev(udev);
1090 usb_priv = rtl_usbpriv(hw);
1091 memset(usb_priv, 0, sizeof(*usb_priv));
1092 usb_priv->dev.intf = intf;
1093 usb_priv->dev.udev = udev;
1094 usb_set_intfdata(intf, hw);
1095 /* init cfg & intf_ops */
1096 rtlpriv->rtlhal.interface = INTF_USB;
1097 rtlpriv->cfg = rtl_hal_cfg;
1098 rtlpriv->intf_ops = &rtl_usb_ops;
1099 rtl_dbgp_flag_init(hw);
1100 /* Init IO handler */
1101 _rtl_usb_io_handler_init(&udev->dev, hw);
1102 rtlpriv->cfg->ops->read_chip_version(hw);
1103 /*like read eeprom and so on */
1104 rtlpriv->cfg->ops->read_eeprom_info(hw);
1105 err = _rtl_usb_init(hw);
1106 if (err)
1107 goto error_out;
1108 rtl_usb_init_sw(hw);
1109 /* Init mac80211 sw */
1110 err = rtl_init_core(hw);
1111 if (err) {
1112 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1113 "Can't allocate sw for mac80211\n");
1114 goto error_out;
1115 }
1116 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1117 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1118 goto error_out;
1119 }
1120 rtlpriv->cfg->ops->init_sw_leds(hw);
1121
1122 return 0;
1123 error_out:
1124 rtl_deinit_core(hw);
1125 _rtl_usb_io_handler_release(hw);
1126 usb_put_dev(udev);
1127 complete(&rtlpriv->firmware_loading_complete);
1128 return -ENODEV;
1129 }
1130 EXPORT_SYMBOL(rtl_usb_probe);
1131
1132 void rtl_usb_disconnect(struct usb_interface *intf)
1133 {
1134 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1135 struct rtl_priv *rtlpriv = rtl_priv(hw);
1136 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1137 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1138
1139 if (unlikely(!rtlpriv))
1140 return;
1141
1142 /* just in case driver is removed before firmware callback */
1143 wait_for_completion(&rtlpriv->firmware_loading_complete);
1144 /*ieee80211_unregister_hw will call ops_stop */
1145 if (rtlmac->mac80211_registered == 1) {
1146 ieee80211_unregister_hw(hw);
1147 rtlmac->mac80211_registered = 0;
1148 } else {
1149 rtl_deinit_deferred_work(hw);
1150 rtlpriv->intf_ops->adapter_stop(hw);
1151 }
1152 /*deinit rfkill */
1153 /* rtl_deinit_rfkill(hw); */
1154 rtl_usb_deinit(hw);
1155 rtl_deinit_core(hw);
1156 kfree(rtlpriv->usb_data);
1157 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1158 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1159 _rtl_usb_io_handler_release(hw);
1160 usb_put_dev(rtlusb->udev);
1161 usb_set_intfdata(intf, NULL);
1162 ieee80211_free_hw(hw);
1163 }
1164 EXPORT_SYMBOL(rtl_usb_disconnect);
1165
1166 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1167 {
1168 return 0;
1169 }
1170 EXPORT_SYMBOL(rtl_usb_suspend);
1171
1172 int rtl_usb_resume(struct usb_interface *pusb_intf)
1173 {
1174 return 0;
1175 }
1176 EXPORT_SYMBOL(rtl_usb_resume);
Linux with added FPC-III support