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xtensa: support DMA buffers in high memory
[cris-mirror.git] / drivers / net / wireless / realtek / rtlwifi / usb.c
blobce3103bb8ebbd12a97874549141d6200c915f00b
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 * The full GNU General Public License is included in this distribution in the
15 * file called LICENSE.
16 *
17 * Contact Information:
18 * wlanfae <wlanfae@realtek.com>
19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
20 * Hsinchu 300, Taiwan.
21 *
22 *****************************************************************************/
23
24 #include "wifi.h"
25 #include "core.h"
26 #include "usb.h"
27 #include "base.h"
28 #include "ps.h"
29 #include "rtl8192c/fw_common.h"
30 #include <linux/export.h>
31 #include <linux/module.h>
32
33 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");
34 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");
35 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");
36 MODULE_LICENSE("GPL");
37 MODULE_DESCRIPTION("USB basic driver for rtlwifi");
38
39 #define REALTEK_USB_VENQT_READ 0xC0
40 #define REALTEK_USB_VENQT_WRITE 0x40
41 #define REALTEK_USB_VENQT_CMD_REQ 0x05
42 #define REALTEK_USB_VENQT_CMD_IDX 0x00
43
44 #define MAX_USBCTRL_VENDORREQ_TIMES 10
45
46 static void usbctrl_async_callback(struct urb *urb)
47 {
48 if (urb) {
49 /* free dr */
50 kfree(urb->setup_packet);
51 /* free databuf */
52 kfree(urb->transfer_buffer);
53 }
54 }
55
56 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
57 u16 value, u16 index, void *pdata,
58 u16 len)
59 {
60 int rc;
61 unsigned int pipe;
62 u8 reqtype;
63 struct usb_ctrlrequest *dr;
64 struct urb *urb;
65 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
66 u8 *databuf;
67
68 if (WARN_ON_ONCE(len > databuf_maxlen))
69 len = databuf_maxlen;
70
71 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
72 reqtype = REALTEK_USB_VENQT_WRITE;
73
74 dr = kzalloc(sizeof(*dr), GFP_ATOMIC);
75 if (!dr)
76 return -ENOMEM;
77
78 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC);
79 if (!databuf) {
80 kfree(dr);
81 return -ENOMEM;
82 }
83
84 urb = usb_alloc_urb(0, GFP_ATOMIC);
85 if (!urb) {
86 kfree(databuf);
87 kfree(dr);
88 return -ENOMEM;
89 }
90
91 dr->bRequestType = reqtype;
92 dr->bRequest = request;
93 dr->wValue = cpu_to_le16(value);
94 dr->wIndex = cpu_to_le16(index);
95 dr->wLength = cpu_to_le16(len);
96 /* data are already in little-endian order */
97 memcpy(databuf, pdata, len);
98 usb_fill_control_urb(urb, udev, pipe,
99 (unsigned char *)dr, databuf, len,
100 usbctrl_async_callback, NULL);
101 rc = usb_submit_urb(urb, GFP_ATOMIC);
102 if (rc < 0) {
103 kfree(databuf);
104 kfree(dr);
105 }
106 usb_free_urb(urb);
107 return rc;
108 }
109
110 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
111 u16 value, u16 index, void *pdata,
112 u16 len)
113 {
114 unsigned int pipe;
115 int status;
116 u8 reqtype;
117 int vendorreq_times = 0;
118 static int count;
119
120 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
121 reqtype = REALTEK_USB_VENQT_READ;
122
123 do {
124 status = usb_control_msg(udev, pipe, request, reqtype, value,
125 index, pdata, len, 1000);
126 if (status < 0) {
127 /* firmware download is checksumed, don't retry */
128 if ((value >= FW_8192C_START_ADDRESS &&
129 value <= FW_8192C_END_ADDRESS))
130 break;
131 } else {
132 break;
133 }
134 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
135
136 if (status < 0 && count++ < 4)
137 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
138 value, status, *(u32 *)pdata);
139 return status;
140 }
141
142 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
143 {
144 struct device *dev = rtlpriv->io.dev;
145 struct usb_device *udev = to_usb_device(dev);
146 u8 request;
147 u16 wvalue;
148 u16 index;
149 __le32 *data;
150 unsigned long flags;
151
152 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
153 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
154 rtlpriv->usb_data_index = 0;
155 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
156 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
157 request = REALTEK_USB_VENQT_CMD_REQ;
158 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
159
160 wvalue = (u16)addr;
161 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
162 return le32_to_cpu(*data);
163 }
164
165 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
166 {
167 return (u8)_usb_read_sync(rtlpriv, addr, 1);
168 }
169
170 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
171 {
172 return (u16)_usb_read_sync(rtlpriv, addr, 2);
173 }
174
175 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
176 {
177 return _usb_read_sync(rtlpriv, addr, 4);
178 }
179
180 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
181 u16 len)
182 {
183 u8 request;
184 u16 wvalue;
185 u16 index;
186 __le32 data;
187
188 request = REALTEK_USB_VENQT_CMD_REQ;
189 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
190 wvalue = (u16)(addr&0x0000ffff);
191 data = cpu_to_le32(val);
192 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
193 len);
194 }
195
196 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
197 {
198 struct device *dev = rtlpriv->io.dev;
199
200 _usb_write_async(to_usb_device(dev), addr, val, 1);
201 }
202
203 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
204 {
205 struct device *dev = rtlpriv->io.dev;
206
207 _usb_write_async(to_usb_device(dev), addr, val, 2);
208 }
209
210 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
211 {
212 struct device *dev = rtlpriv->io.dev;
213
214 _usb_write_async(to_usb_device(dev), addr, val, 4);
215 }
216
217 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
218 u16 len)
219 {
220 struct device *dev = rtlpriv->io.dev;
221 struct usb_device *udev = to_usb_device(dev);
222 u8 request = REALTEK_USB_VENQT_CMD_REQ;
223 u8 reqtype = REALTEK_USB_VENQT_WRITE;
224 u16 wvalue;
225 u16 index = REALTEK_USB_VENQT_CMD_IDX;
226 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
227 u8 *buffer;
228
229 wvalue = (u16)(addr & 0x0000ffff);
230 buffer = kmemdup(data, len, GFP_ATOMIC);
231 if (!buffer)
232 return;
233 usb_control_msg(udev, pipe, request, reqtype, wvalue,
234 index, buffer, len, 50);
235
236 kfree(buffer);
237 }
238
239 static void _rtl_usb_io_handler_init(struct device *dev,
240 struct ieee80211_hw *hw)
241 {
242 struct rtl_priv *rtlpriv = rtl_priv(hw);
243
244 rtlpriv->io.dev = dev;
245 mutex_init(&rtlpriv->io.bb_mutex);
246 rtlpriv->io.write8_async = _usb_write8_async;
247 rtlpriv->io.write16_async = _usb_write16_async;
248 rtlpriv->io.write32_async = _usb_write32_async;
249 rtlpriv->io.read8_sync = _usb_read8_sync;
250 rtlpriv->io.read16_sync = _usb_read16_sync;
251 rtlpriv->io.read32_sync = _usb_read32_sync;
252 rtlpriv->io.writeN_sync = _usb_writeN_sync;
253 }
254
255 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
256 {
257 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
258
259 mutex_destroy(&rtlpriv->io.bb_mutex);
260 }
261
262 /**
263 *
264 * Default aggregation handler. Do nothing and just return the oldest skb.
265 */
266 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
267 struct sk_buff_head *list)
268 {
269 return skb_dequeue(list);
270 }
271
272 #define IS_HIGH_SPEED_USB(udev) \
273 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
274
275 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
276 {
277 u32 i;
278 struct rtl_priv *rtlpriv = rtl_priv(hw);
279 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
280
281 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
282 ? USB_HIGH_SPEED_BULK_SIZE
283 : USB_FULL_SPEED_BULK_SIZE;
284
285 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
286 rtlusb->max_bulk_out_size);
287
288 for (i = 0; i < __RTL_TXQ_NUM; i++) {
289 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
290 if (!ep_num) {
291 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
292 "Invalid endpoint map setting!\n");
293 return -EINVAL;
294 }
295 }
296
297 rtlusb->usb_tx_post_hdl =
298 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
299 rtlusb->usb_tx_cleanup =
300 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
301 rtlusb->usb_tx_aggregate_hdl =
302 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
303 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
304 : &_none_usb_tx_aggregate_hdl;
305
306 init_usb_anchor(&rtlusb->tx_submitted);
307 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
308 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
309 init_usb_anchor(&rtlusb->tx_pending[i]);
310 }
311 return 0;
312 }
313
314 static void _rtl_rx_work(unsigned long param);
315
316 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
317 {
318 struct rtl_priv *rtlpriv = rtl_priv(hw);
319 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
320 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
321
322 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
323 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
324 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
325 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
326 rtlusb->usb_rx_segregate_hdl =
327 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
328
329 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
330 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
331 init_usb_anchor(&rtlusb->rx_submitted);
332 init_usb_anchor(&rtlusb->rx_cleanup_urbs);
333
334 skb_queue_head_init(&rtlusb->rx_queue);
335 rtlusb->rx_work_tasklet.func = _rtl_rx_work;
336 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
337
338 return 0;
339 }
340
341 static int _rtl_usb_init(struct ieee80211_hw *hw)
342 {
343 struct rtl_priv *rtlpriv = rtl_priv(hw);
344 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
345 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
346 int err;
347 u8 epidx;
348 struct usb_interface *usb_intf = rtlusb->intf;
349 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
350
351 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
352 for (epidx = 0; epidx < epnums; epidx++) {
353 struct usb_endpoint_descriptor *pep_desc;
354 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
355
356 if (usb_endpoint_dir_in(pep_desc))
357 rtlusb->in_ep_nums++;
358 else if (usb_endpoint_dir_out(pep_desc))
359 rtlusb->out_ep_nums++;
360
361 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
362 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
363 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
364 pep_desc->bInterval);
365 }
366 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
367 pr_err("Too few input end points found\n");
368 return -EINVAL;
369 }
370 if (rtlusb->out_ep_nums == 0) {
371 pr_err("No output end points found\n");
372 return -EINVAL;
373 }
374 /* usb endpoint mapping */
375 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
376 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
377 _rtl_usb_init_tx(hw);
378 _rtl_usb_init_rx(hw);
379 return err;
380 }
381
382 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
383 {
384 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
385 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
386 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
387 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
388
389 rtlhal->hw = hw;
390 ppsc->inactiveps = false;
391 ppsc->leisure_ps = false;
392 ppsc->fwctrl_lps = false;
393 ppsc->reg_fwctrl_lps = 3;
394 ppsc->reg_max_lps_awakeintvl = 5;
395 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
396
397 /* IBSS */
398 mac->beacon_interval = 100;
399
400 /* AMPDU */
401 mac->min_space_cfg = 0;
402 mac->max_mss_density = 0;
403
404 /* set sane AMPDU defaults */
405 mac->current_ampdu_density = 7;
406 mac->current_ampdu_factor = 3;
407
408 /* QOS */
409 rtlusb->acm_method = EACMWAY2_SW;
410
411 /* IRQ */
412 /* HIMR - turn all on */
413 rtlusb->irq_mask[0] = 0xFFFFFFFF;
414 /* HIMR_EX - turn all on */
415 rtlusb->irq_mask[1] = 0xFFFFFFFF;
416 rtlusb->disableHWSM = true;
417 }
418
419 static void _rtl_rx_completed(struct urb *urb);
420
421 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
422 struct urb *urb, gfp_t gfp_mask)
423 {
424 void *buf;
425
426 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
427 &urb->transfer_dma);
428 if (!buf) {
429 pr_err("Failed to usb_alloc_coherent!!\n");
430 return -ENOMEM;
431 }
432
433 usb_fill_bulk_urb(urb, rtlusb->udev,
434 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
435 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
436 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
437
438 return 0;
439 }
440
441 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
442 struct sk_buff *skb)
443 {
444 struct rtl_priv *rtlpriv = rtl_priv(hw);
445 u8 *rxdesc = skb->data;
446 struct ieee80211_hdr *hdr;
447 bool unicast = false;
448 __le16 fc;
449 struct ieee80211_rx_status rx_status = {0};
450 struct rtl_stats stats = {
451 .signal = 0,
452 .rate = 0,
453 };
454
455 skb_pull(skb, RTL_RX_DESC_SIZE);
456 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
457 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
458 hdr = (struct ieee80211_hdr *)(skb->data);
459 fc = hdr->frame_control;
460 if (!stats.crc) {
461 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
462
463 if (is_broadcast_ether_addr(hdr->addr1)) {
464 /*TODO*/;
465 } else if (is_multicast_ether_addr(hdr->addr1)) {
466 /*TODO*/
467 } else {
468 unicast = true;
469 rtlpriv->stats.rxbytesunicast += skb->len;
470 }
471
472 if (ieee80211_is_data(fc)) {
473 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
474
475 if (unicast)
476 rtlpriv->link_info.num_rx_inperiod++;
477 }
478 /* static bcn for roaming */
479 rtl_beacon_statistic(hw, skb);
480 }
481 }
482
483 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
484 struct sk_buff *skb)
485 {
486 struct rtl_priv *rtlpriv = rtl_priv(hw);
487 u8 *rxdesc = skb->data;
488 struct ieee80211_hdr *hdr;
489 bool unicast = false;
490 __le16 fc;
491 struct ieee80211_rx_status rx_status = {0};
492 struct rtl_stats stats = {
493 .signal = 0,
494 .rate = 0,
495 };
496
497 skb_pull(skb, RTL_RX_DESC_SIZE);
498 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
499 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
500 hdr = (struct ieee80211_hdr *)(skb->data);
501 fc = hdr->frame_control;
502 if (!stats.crc) {
503 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
504
505 if (is_broadcast_ether_addr(hdr->addr1)) {
506 /*TODO*/;
507 } else if (is_multicast_ether_addr(hdr->addr1)) {
508 /*TODO*/
509 } else {
510 unicast = true;
511 rtlpriv->stats.rxbytesunicast += skb->len;
512 }
513
514 if (ieee80211_is_data(fc)) {
515 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
516
517 if (unicast)
518 rtlpriv->link_info.num_rx_inperiod++;
519 }
520
521 /* static bcn for roaming */
522 rtl_beacon_statistic(hw, skb);
523
524 if (likely(rtl_action_proc(hw, skb, false)))
525 ieee80211_rx(hw, skb);
526 else
527 dev_kfree_skb_any(skb);
528 } else {
529 dev_kfree_skb_any(skb);
530 }
531 }
532
533 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
534 {
535 struct sk_buff *_skb;
536 struct sk_buff_head rx_queue;
537 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
538
539 skb_queue_head_init(&rx_queue);
540 if (rtlusb->usb_rx_segregate_hdl)
541 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
542 WARN_ON(skb_queue_empty(&rx_queue));
543 while (!skb_queue_empty(&rx_queue)) {
544 _skb = skb_dequeue(&rx_queue);
545 _rtl_usb_rx_process_agg(hw, _skb);
546 ieee80211_rx(hw, _skb);
547 }
548 }
549
550 #define __RX_SKB_MAX_QUEUED 64
551
552 static void _rtl_rx_work(unsigned long param)
553 {
554 struct rtl_usb *rtlusb = (struct rtl_usb *)param;
555 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
556 struct sk_buff *skb;
557
558 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
559 if (unlikely(IS_USB_STOP(rtlusb))) {
560 dev_kfree_skb_any(skb);
561 continue;
562 }
563
564 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
565 _rtl_usb_rx_process_noagg(hw, skb);
566 } else {
567 /* TO DO */
568 _rtl_rx_pre_process(hw, skb);
569 pr_err("rx agg not supported\n");
570 }
571 }
572 }
573
574 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
575 unsigned int len)
576 {
577 #if NET_IP_ALIGN != 0
578 unsigned int padding = 0;
579 #endif
580
581 /* make function no-op when possible */
582 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
583 return 0;
584
585 #if NET_IP_ALIGN != 0
586 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
587 /* TODO: deduplicate common code, define helper function instead? */
588
589 if (ieee80211_is_data_qos(hdr->frame_control)) {
590 u8 *qc = ieee80211_get_qos_ctl(hdr);
591
592 padding ^= NET_IP_ALIGN;
593
594 /* Input might be invalid, avoid accessing memory outside
595 * the buffer.
596 */
597 if ((unsigned long)qc - (unsigned long)hdr < len &&
598 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
599 padding ^= NET_IP_ALIGN;
600 }
601
602 if (ieee80211_has_a4(hdr->frame_control))
603 padding ^= NET_IP_ALIGN;
604
605 return padding;
606 #endif
607 }
608
609 #define __RADIO_TAP_SIZE_RSV 32
610
611 static void _rtl_rx_completed(struct urb *_urb)
612 {
613 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
614 int err = 0;
615
616 if (unlikely(IS_USB_STOP(rtlusb)))
617 goto free;
618
619 if (likely(0 == _urb->status)) {
620 unsigned int padding;
621 struct sk_buff *skb;
622 unsigned int qlen;
623 unsigned int size = _urb->actual_length;
624 struct ieee80211_hdr *hdr;
625
626 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
627 pr_err("Too short packet from bulk IN! (len: %d)\n",
628 size);
629 goto resubmit;
630 }
631
632 qlen = skb_queue_len(&rtlusb->rx_queue);
633 if (qlen >= __RX_SKB_MAX_QUEUED) {
634 pr_err("Pending RX skbuff queue full! (qlen: %d)\n",
635 qlen);
636 goto resubmit;
637 }
638
639 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
640 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
641
642 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
643 if (!skb) {
644 pr_err("Can't allocate skb for bulk IN!\n");
645 goto resubmit;
646 }
647
648 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
649
650 /* Make sure the payload data is 4 byte aligned. */
651 skb_reserve(skb, padding);
652
653 /* reserve some space for mac80211's radiotap */
654 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
655
656 skb_put_data(skb, _urb->transfer_buffer, size);
657
658 skb_queue_tail(&rtlusb->rx_queue, skb);
659 tasklet_schedule(&rtlusb->rx_work_tasklet);
660
661 goto resubmit;
662 }
663
664 switch (_urb->status) {
665 /* disconnect */
666 case -ENOENT:
667 case -ECONNRESET:
668 case -ENODEV:
669 case -ESHUTDOWN:
670 goto free;
671 default:
672 break;
673 }
674
675 resubmit:
676 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
677 err = usb_submit_urb(_urb, GFP_ATOMIC);
678 if (unlikely(err)) {
679 usb_unanchor_urb(_urb);
680 goto free;
681 }
682 return;
683
684 free:
685 /* On some architectures, usb_free_coherent must not be called from
686 * hardirq context. Queue urb to cleanup list.
687 */
688 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
689 }
690
691 #undef __RADIO_TAP_SIZE_RSV
692
693 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
694 {
695 struct rtl_priv *rtlpriv = rtl_priv(hw);
696 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
697 struct urb *urb;
698
699 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
700
701 tasklet_kill(&rtlusb->rx_work_tasklet);
702 cancel_work_sync(&rtlpriv->works.lps_change_work);
703
704 flush_workqueue(rtlpriv->works.rtl_wq);
705 destroy_workqueue(rtlpriv->works.rtl_wq);
706
707 skb_queue_purge(&rtlusb->rx_queue);
708
709 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
710 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
711 urb->transfer_buffer, urb->transfer_dma);
712 usb_free_urb(urb);
713 }
714 }
715
716 static int _rtl_usb_receive(struct ieee80211_hw *hw)
717 {
718 struct urb *urb;
719 int err;
720 int i;
721 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
722
723 WARN_ON(0 == rtlusb->rx_urb_num);
724 /* 1600 == 1514 + max WLAN header + rtk info */
725 WARN_ON(rtlusb->rx_max_size < 1600);
726
727 for (i = 0; i < rtlusb->rx_urb_num; i++) {
728 err = -ENOMEM;
729 urb = usb_alloc_urb(0, GFP_KERNEL);
730 if (!urb)
731 goto err_out;
732
733 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
734 if (err < 0) {
735 pr_err("Failed to prep_rx_urb!!\n");
736 usb_free_urb(urb);
737 goto err_out;
738 }
739
740 usb_anchor_urb(urb, &rtlusb->rx_submitted);
741 err = usb_submit_urb(urb, GFP_KERNEL);
742 if (err)
743 goto err_out;
744 usb_free_urb(urb);
745 }
746 return 0;
747
748 err_out:
749 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
750 _rtl_usb_cleanup_rx(hw);
751 return err;
752 }
753
754 static int rtl_usb_start(struct ieee80211_hw *hw)
755 {
756 int err;
757 struct rtl_priv *rtlpriv = rtl_priv(hw);
758 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
759 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
760
761 err = rtlpriv->cfg->ops->hw_init(hw);
762 if (!err) {
763 rtl_init_rx_config(hw);
764
765 /* Enable software */
766 SET_USB_START(rtlusb);
767 /* should after adapter start and interrupt enable. */
768 set_hal_start(rtlhal);
769
770 /* Start bulk IN */
771 err = _rtl_usb_receive(hw);
772 }
773
774 return err;
775 }
776 /**
777 *
778 *
779 */
780
781 /*======================= tx =========================================*/
782 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
783 {
784 u32 i;
785 struct sk_buff *_skb;
786 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
787 struct ieee80211_tx_info *txinfo;
788
789 /* clean up rx stuff. */
790 _rtl_usb_cleanup_rx(hw);
791
792 /* clean up tx stuff */
793 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
794 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
795 rtlusb->usb_tx_cleanup(hw, _skb);
796 txinfo = IEEE80211_SKB_CB(_skb);
797 ieee80211_tx_info_clear_status(txinfo);
798 txinfo->flags |= IEEE80211_TX_STAT_ACK;
799 ieee80211_tx_status_irqsafe(hw, _skb);
800 }
801 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
802 }
803 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
804 }
805
806 /**
807 *
808 * We may add some struct into struct rtl_usb later. Do deinit here.
809 *
810 */
811 static void rtl_usb_deinit(struct ieee80211_hw *hw)
812 {
813 rtl_usb_cleanup(hw);
814 }
815
816 static void rtl_usb_stop(struct ieee80211_hw *hw)
817 {
818 struct rtl_priv *rtlpriv = rtl_priv(hw);
819 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
820 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
821 struct urb *urb;
822
823 /* should after adapter start and interrupt enable. */
824 set_hal_stop(rtlhal);
825 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
826 /* Enable software */
827 SET_USB_STOP(rtlusb);
828
829 /* free pre-allocated URBs from rtl_usb_start() */
830 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
831
832 tasklet_kill(&rtlusb->rx_work_tasklet);
833 cancel_work_sync(&rtlpriv->works.lps_change_work);
834
835 flush_workqueue(rtlpriv->works.rtl_wq);
836
837 skb_queue_purge(&rtlusb->rx_queue);
838
839 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
840 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
841 urb->transfer_buffer, urb->transfer_dma);
842 usb_free_urb(urb);
843 }
844
845 rtlpriv->cfg->ops->hw_disable(hw);
846 }
847
848 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
849 {
850 int err;
851 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
852
853 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
854 err = usb_submit_urb(_urb, GFP_ATOMIC);
855 if (err < 0) {
856 struct sk_buff *skb;
857
858 pr_err("Failed to submit urb\n");
859 usb_unanchor_urb(_urb);
860 skb = (struct sk_buff *)_urb->context;
861 kfree_skb(skb);
862 }
863 usb_free_urb(_urb);
864 }
865
866 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
867 struct sk_buff *skb)
868 {
869 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
870 struct ieee80211_tx_info *txinfo;
871
872 rtlusb->usb_tx_post_hdl(hw, urb, skb);
873 skb_pull(skb, RTL_TX_HEADER_SIZE);
874 txinfo = IEEE80211_SKB_CB(skb);
875 ieee80211_tx_info_clear_status(txinfo);
876 txinfo->flags |= IEEE80211_TX_STAT_ACK;
877
878 if (urb->status) {
879 pr_err("Urb has error status 0x%X\n", urb->status);
880 goto out;
881 }
882 /* TODO: statistics */
883 out:
884 ieee80211_tx_status_irqsafe(hw, skb);
885 return urb->status;
886 }
887
888 static void _rtl_tx_complete(struct urb *urb)
889 {
890 struct sk_buff *skb = (struct sk_buff *)urb->context;
891 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
892 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
893 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
894 int err;
895
896 if (unlikely(IS_USB_STOP(rtlusb)))
897 return;
898 err = _usb_tx_post(hw, urb, skb);
899 if (err) {
900 /* Ignore error and keep issuiing other urbs */
901 return;
902 }
903 }
904
905 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
906 struct sk_buff *skb, u32 ep_num)
907 {
908 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
909 struct urb *_urb;
910
911 WARN_ON(NULL == skb);
912 _urb = usb_alloc_urb(0, GFP_ATOMIC);
913 if (!_urb) {
914 kfree_skb(skb);
915 return NULL;
916 }
917 _rtl_install_trx_info(rtlusb, skb, ep_num);
918 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
919 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
920 _urb->transfer_flags |= URB_ZERO_PACKET;
921 return _urb;
922 }
923
924 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
925 enum rtl_txq qnum)
926 {
927 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
928 u32 ep_num;
929 struct urb *_urb = NULL;
930 struct sk_buff *_skb = NULL;
931
932 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
933 if (unlikely(IS_USB_STOP(rtlusb))) {
934 pr_err("USB device is stopping...\n");
935 kfree_skb(skb);
936 return;
937 }
938 ep_num = rtlusb->ep_map.ep_mapping[qnum];
939 _skb = skb;
940 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
941 if (unlikely(!_urb)) {
942 pr_err("Can't allocate urb. Drop skb!\n");
943 kfree_skb(skb);
944 return;
945 }
946 _rtl_submit_tx_urb(hw, _urb);
947 }
948
949 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
950 struct ieee80211_sta *sta,
951 struct sk_buff *skb,
952 u16 hw_queue)
953 {
954 struct rtl_priv *rtlpriv = rtl_priv(hw);
955 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
956 struct rtl_tx_desc *pdesc = NULL;
957 struct rtl_tcb_desc tcb_desc;
958 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
959 __le16 fc = hdr->frame_control;
960 u8 *pda_addr = hdr->addr1;
961
962 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
963 if (ieee80211_is_auth(fc)) {
964 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
965 }
966
967 if (rtlpriv->psc.sw_ps_enabled) {
968 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
969 !ieee80211_has_pm(fc))
970 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
971 }
972
973 rtl_action_proc(hw, skb, true);
974 if (is_multicast_ether_addr(pda_addr))
975 rtlpriv->stats.txbytesmulticast += skb->len;
976 else if (is_broadcast_ether_addr(pda_addr))
977 rtlpriv->stats.txbytesbroadcast += skb->len;
978 else
979 rtlpriv->stats.txbytesunicast += skb->len;
980 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
981 hw_queue, &tcb_desc);
982 if (ieee80211_is_data(fc))
983 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
984 }
985
986 static int rtl_usb_tx(struct ieee80211_hw *hw,
987 struct ieee80211_sta *sta,
988 struct sk_buff *skb,
989 struct rtl_tcb_desc *dummy)
990 {
991 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
992 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
993 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
994 __le16 fc = hdr->frame_control;
995 u16 hw_queue;
996
997 if (unlikely(is_hal_stop(rtlhal)))
998 goto err_free;
999 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1000 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1001 _rtl_usb_transmit(hw, skb, hw_queue);
1002 return NETDEV_TX_OK;
1003
1004 err_free:
1005 dev_kfree_skb_any(skb);
1006 return NETDEV_TX_OK;
1007 }
1008
1009 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1010 struct ieee80211_sta *sta,
1011 struct sk_buff *skb)
1012 {
1013 return false;
1014 }
1015
1016 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1017 {
1018 struct rtl_works *rtlworks =
1019 container_of(work, struct rtl_works, fill_h2c_cmd);
1020 struct ieee80211_hw *hw = rtlworks->hw;
1021 struct rtl_priv *rtlpriv = rtl_priv(hw);
1022
1023 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1024 }
1025
1026 static const struct rtl_intf_ops rtl_usb_ops = {
1027 .adapter_start = rtl_usb_start,
1028 .adapter_stop = rtl_usb_stop,
1029 .adapter_tx = rtl_usb_tx,
1030 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1031 };
1032
1033 int rtl_usb_probe(struct usb_interface *intf,
1034 const struct usb_device_id *id,
1035 struct rtl_hal_cfg *rtl_hal_cfg)
1036 {
1037 int err;
1038 struct ieee80211_hw *hw = NULL;
1039 struct rtl_priv *rtlpriv = NULL;
1040 struct usb_device *udev;
1041 struct rtl_usb_priv *usb_priv;
1042
1043 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1044 sizeof(struct rtl_usb_priv), &rtl_ops);
1045 if (!hw) {
1046 WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n");
1047 return -ENOMEM;
1048 }
1049 rtlpriv = hw->priv;
1050 rtlpriv->hw = hw;
1051 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1052 GFP_KERNEL);
1053 if (!rtlpriv->usb_data)
1054 return -ENOMEM;
1055
1056 /* this spin lock must be initialized early */
1057 spin_lock_init(&rtlpriv->locks.usb_lock);
1058 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1059 rtl_fill_h2c_cmd_work_callback);
1060 INIT_WORK(&rtlpriv->works.lps_change_work,
1061 rtl_lps_change_work_callback);
1062
1063 rtlpriv->usb_data_index = 0;
1064 init_completion(&rtlpriv->firmware_loading_complete);
1065 SET_IEEE80211_DEV(hw, &intf->dev);
1066 udev = interface_to_usbdev(intf);
1067 usb_get_dev(udev);
1068 usb_priv = rtl_usbpriv(hw);
1069 memset(usb_priv, 0, sizeof(*usb_priv));
1070 usb_priv->dev.intf = intf;
1071 usb_priv->dev.udev = udev;
1072 usb_set_intfdata(intf, hw);
1073 /* init cfg & intf_ops */
1074 rtlpriv->rtlhal.interface = INTF_USB;
1075 rtlpriv->cfg = rtl_hal_cfg;
1076 rtlpriv->intf_ops = &rtl_usb_ops;
1077 /* Init IO handler */
1078 _rtl_usb_io_handler_init(&udev->dev, hw);
1079 rtlpriv->cfg->ops->read_chip_version(hw);
1080 /*like read eeprom and so on */
1081 rtlpriv->cfg->ops->read_eeprom_info(hw);
1082 err = _rtl_usb_init(hw);
1083 if (err)
1084 goto error_out;
1085 rtl_usb_init_sw(hw);
1086 /* Init mac80211 sw */
1087 err = rtl_init_core(hw);
1088 if (err) {
1089 pr_err("Can't allocate sw for mac80211\n");
1090 goto error_out;
1091 }
1092 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1093 pr_err("Can't init_sw_vars\n");
1094 goto error_out;
1095 }
1096 rtlpriv->cfg->ops->init_sw_leds(hw);
1097
1098 err = ieee80211_register_hw(hw);
1099 if (err) {
1100 pr_err("Can't register mac80211 hw.\n");
1101 err = -ENODEV;
1102 goto error_out;
1103 }
1104 rtlpriv->mac80211.mac80211_registered = 1;
1105
1106 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1107 return 0;
1108
1109 error_out:
1110 rtl_deinit_core(hw);
1111 _rtl_usb_io_handler_release(hw);
1112 usb_put_dev(udev);
1113 complete(&rtlpriv->firmware_loading_complete);
1114 return -ENODEV;
1115 }
1116 EXPORT_SYMBOL(rtl_usb_probe);
1117
1118 void rtl_usb_disconnect(struct usb_interface *intf)
1119 {
1120 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1121 struct rtl_priv *rtlpriv = rtl_priv(hw);
1122 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1123 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1124
1125 if (unlikely(!rtlpriv))
1126 return;
1127 /* just in case driver is removed before firmware callback */
1128 wait_for_completion(&rtlpriv->firmware_loading_complete);
1129 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1130 /*ieee80211_unregister_hw will call ops_stop */
1131 if (rtlmac->mac80211_registered == 1) {
1132 ieee80211_unregister_hw(hw);
1133 rtlmac->mac80211_registered = 0;
1134 } else {
1135 rtl_deinit_deferred_work(hw);
1136 rtlpriv->intf_ops->adapter_stop(hw);
1137 }
1138 /*deinit rfkill */
1139 /* rtl_deinit_rfkill(hw); */
1140 rtl_usb_deinit(hw);
1141 rtl_deinit_core(hw);
1142 kfree(rtlpriv->usb_data);
1143 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1144 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1145 _rtl_usb_io_handler_release(hw);
1146 usb_put_dev(rtlusb->udev);
1147 usb_set_intfdata(intf, NULL);
1148 ieee80211_free_hw(hw);
1149 }
1150 EXPORT_SYMBOL(rtl_usb_disconnect);
1151
1152 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1153 {
1154 return 0;
1155 }
1156 EXPORT_SYMBOL(rtl_usb_suspend);
1157
1158 int rtl_usb_resume(struct usb_interface *pusb_intf)
1159 {
1160 return 0;
1161 }
1162 EXPORT_SYMBOL(rtl_usb_resume);
CRIS linux kernel tree