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rtlwifi: rtl8192c: rtl8192ce: rtl8192cu: rtl8192se: Remove sparse warnings
[deliverable/linux.git] / drivers / net / wireless / rtlwifi / usb.c
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
36 #define REALTEK_USB_VENQT_READ 0xC0
37 #define REALTEK_USB_VENQT_WRITE 0x40
38 #define REALTEK_USB_VENQT_CMD_REQ 0x05
39 #define REALTEK_USB_VENQT_CMD_IDX 0x00
40
41 #define MAX_USBCTRL_VENDORREQ_TIMES 10
42
43 static void usbctrl_async_callback(struct urb *urb)
44 {
45 if (urb)
46 kfree(urb->context);
47 }
48
49 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
50 u16 value, u16 index, void *pdata,
51 u16 len)
52 {
53 int rc;
54 unsigned int pipe;
55 u8 reqtype;
56 struct usb_ctrlrequest *dr;
57 struct urb *urb;
58 struct rtl819x_async_write_data {
59 u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
60 struct usb_ctrlrequest dr;
61 } *buf;
62
63 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
64 reqtype = REALTEK_USB_VENQT_WRITE;
65
66 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
67 if (!buf)
68 return -ENOMEM;
69
70 urb = usb_alloc_urb(0, GFP_ATOMIC);
71 if (!urb) {
72 kfree(buf);
73 return -ENOMEM;
74 }
75
76 dr = &buf->dr;
77
78 dr->bRequestType = reqtype;
79 dr->bRequest = request;
80 dr->wValue = cpu_to_le16(value);
81 dr->wIndex = cpu_to_le16(index);
82 dr->wLength = cpu_to_le16(len);
83 /* data are already in little-endian order */
84 memcpy(buf, pdata, len);
85 usb_fill_control_urb(urb, udev, pipe,
86 (unsigned char *)dr, buf, len,
87 usbctrl_async_callback, buf);
88 rc = usb_submit_urb(urb, GFP_ATOMIC);
89 if (rc < 0)
90 kfree(buf);
91 usb_free_urb(urb);
92 return rc;
93 }
94
95 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
96 u16 value, u16 index, void *pdata,
97 u16 len)
98 {
99 unsigned int pipe;
100 int status;
101 u8 reqtype;
102 int vendorreq_times = 0;
103 static int count;
104
105 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
106 reqtype = REALTEK_USB_VENQT_READ;
107
108 do {
109 status = usb_control_msg(udev, pipe, request, reqtype, value,
110 index, pdata, len, 0); /*max. timeout*/
111 if (status < 0) {
112 /* firmware download is checksumed, don't retry */
113 if ((value >= FW_8192C_START_ADDRESS &&
114 value <= FW_8192C_END_ADDRESS))
115 break;
116 } else {
117 break;
118 }
119 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
120
121 if (status < 0 && count++ < 4)
122 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
123 value, status, *(u32 *)pdata);
124 return status;
125 }
126
127 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
128 {
129 struct device *dev = rtlpriv->io.dev;
130 struct usb_device *udev = to_usb_device(dev);
131 u8 request;
132 u16 wvalue;
133 u16 index;
134 __le32 *data;
135 unsigned long flags;
136
137 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
138 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
139 rtlpriv->usb_data_index = 0;
140 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
141 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
142 request = REALTEK_USB_VENQT_CMD_REQ;
143 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
144
145 wvalue = (u16)addr;
146 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
147 return le32_to_cpu(*data);
148 }
149
150 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
151 {
152 return (u8)_usb_read_sync(rtlpriv, addr, 1);
153 }
154
155 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
156 {
157 return (u16)_usb_read_sync(rtlpriv, addr, 2);
158 }
159
160 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
161 {
162 return _usb_read_sync(rtlpriv, addr, 4);
163 }
164
165 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
166 u16 len)
167 {
168 u8 request;
169 u16 wvalue;
170 u16 index;
171 __le32 data;
172
173 request = REALTEK_USB_VENQT_CMD_REQ;
174 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
175 wvalue = (u16)(addr&0x0000ffff);
176 data = cpu_to_le32(val);
177 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
178 len);
179 }
180
181 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
182 {
183 struct device *dev = rtlpriv->io.dev;
184
185 _usb_write_async(to_usb_device(dev), addr, val, 1);
186 }
187
188 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
189 {
190 struct device *dev = rtlpriv->io.dev;
191
192 _usb_write_async(to_usb_device(dev), addr, val, 2);
193 }
194
195 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
196 {
197 struct device *dev = rtlpriv->io.dev;
198
199 _usb_write_async(to_usb_device(dev), addr, val, 4);
200 }
201
202 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
203 u16 len)
204 {
205 struct device *dev = rtlpriv->io.dev;
206 struct usb_device *udev = to_usb_device(dev);
207 u8 request = REALTEK_USB_VENQT_CMD_REQ;
208 u8 reqtype = REALTEK_USB_VENQT_WRITE;
209 u16 wvalue;
210 u16 index = REALTEK_USB_VENQT_CMD_IDX;
211 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
212 u8 *buffer;
213 dma_addr_t dma_addr;
214
215 wvalue = (u16)(addr&0x0000ffff);
216 buffer = usb_alloc_coherent(udev, (size_t)len, GFP_ATOMIC, &dma_addr);
217 if (!buffer)
218 return;
219 memcpy(buffer, data, len);
220 usb_control_msg(udev, pipe, request, reqtype, wvalue,
221 index, buffer, len, 50);
222
223 usb_free_coherent(udev, (size_t)len, buffer, dma_addr);
224 }
225
226 static void _rtl_usb_io_handler_init(struct device *dev,
227 struct ieee80211_hw *hw)
228 {
229 struct rtl_priv *rtlpriv = rtl_priv(hw);
230
231 rtlpriv->io.dev = dev;
232 mutex_init(&rtlpriv->io.bb_mutex);
233 rtlpriv->io.write8_async = _usb_write8_async;
234 rtlpriv->io.write16_async = _usb_write16_async;
235 rtlpriv->io.write32_async = _usb_write32_async;
236 rtlpriv->io.read8_sync = _usb_read8_sync;
237 rtlpriv->io.read16_sync = _usb_read16_sync;
238 rtlpriv->io.read32_sync = _usb_read32_sync;
239 rtlpriv->io.writeN_sync = _usb_writeN_sync;
240 }
241
242 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
243 {
244 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
245
246 mutex_destroy(&rtlpriv->io.bb_mutex);
247 }
248
249 /**
250 *
251 * Default aggregation handler. Do nothing and just return the oldest skb.
252 */
253 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
254 struct sk_buff_head *list)
255 {
256 return skb_dequeue(list);
257 }
258
259 #define IS_HIGH_SPEED_USB(udev) \
260 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
261
262 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
263 {
264 u32 i;
265 struct rtl_priv *rtlpriv = rtl_priv(hw);
266 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
267
268 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
269 ? USB_HIGH_SPEED_BULK_SIZE
270 : USB_FULL_SPEED_BULK_SIZE;
271
272 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
273 rtlusb->max_bulk_out_size);
274
275 for (i = 0; i < __RTL_TXQ_NUM; i++) {
276 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
277 if (!ep_num) {
278 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
279 "Invalid endpoint map setting!\n");
280 return -EINVAL;
281 }
282 }
283
284 rtlusb->usb_tx_post_hdl =
285 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
286 rtlusb->usb_tx_cleanup =
287 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
288 rtlusb->usb_tx_aggregate_hdl =
289 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
290 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
291 : &_none_usb_tx_aggregate_hdl;
292
293 init_usb_anchor(&rtlusb->tx_submitted);
294 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
295 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
296 init_usb_anchor(&rtlusb->tx_pending[i]);
297 }
298 return 0;
299 }
300
301 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
302 {
303 struct rtl_priv *rtlpriv = rtl_priv(hw);
304 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
305 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
306
307 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
308 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
309 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
310 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
311 rtlusb->usb_rx_segregate_hdl =
312 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
313
314 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
315 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
316 init_usb_anchor(&rtlusb->rx_submitted);
317 return 0;
318 }
319
320 static int _rtl_usb_init(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 int err;
326 u8 epidx;
327 struct usb_interface *usb_intf = rtlusb->intf;
328 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
329
330 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
331 for (epidx = 0; epidx < epnums; epidx++) {
332 struct usb_endpoint_descriptor *pep_desc;
333 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
334
335 if (usb_endpoint_dir_in(pep_desc))
336 rtlusb->in_ep_nums++;
337 else if (usb_endpoint_dir_out(pep_desc))
338 rtlusb->out_ep_nums++;
339
340 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
341 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
342 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
343 pep_desc->bInterval);
344 }
345 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
346 pr_err("Too few input end points found\n");
347 return -EINVAL;
348 }
349 if (rtlusb->out_ep_nums == 0) {
350 pr_err("No output end points found\n");
351 return -EINVAL;
352 }
353 /* usb endpoint mapping */
354 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
355 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
356 _rtl_usb_init_tx(hw);
357 _rtl_usb_init_rx(hw);
358 return err;
359 }
360
361 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
362 {
363 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
364 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
365 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
366 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
367
368 rtlhal->hw = hw;
369 ppsc->inactiveps = false;
370 ppsc->leisure_ps = false;
371 ppsc->fwctrl_lps = false;
372 ppsc->reg_fwctrl_lps = 3;
373 ppsc->reg_max_lps_awakeintvl = 5;
374 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
375
376 /* IBSS */
377 mac->beacon_interval = 100;
378
379 /* AMPDU */
380 mac->min_space_cfg = 0;
381 mac->max_mss_density = 0;
382
383 /* set sane AMPDU defaults */
384 mac->current_ampdu_density = 7;
385 mac->current_ampdu_factor = 3;
386
387 /* QOS */
388 rtlusb->acm_method = eAcmWay2_SW;
389
390 /* IRQ */
391 /* HIMR - turn all on */
392 rtlusb->irq_mask[0] = 0xFFFFFFFF;
393 /* HIMR_EX - turn all on */
394 rtlusb->irq_mask[1] = 0xFFFFFFFF;
395 rtlusb->disableHWSM = true;
396 }
397
398 #define __RADIO_TAP_SIZE_RSV 32
399
400 static void _rtl_rx_completed(struct urb *urb);
401
402 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
403 struct rtl_usb *rtlusb,
404 struct urb *urb,
405 gfp_t gfp_mask)
406 {
407 struct sk_buff *skb;
408 struct rtl_priv *rtlpriv = rtl_priv(hw);
409
410 skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
411 gfp_mask);
412 if (!skb) {
413 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
414 "Failed to __dev_alloc_skb!!\n");
415 return ERR_PTR(-ENOMEM);
416 }
417
418 /* reserve some space for mac80211's radiotap */
419 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
420 usb_fill_bulk_urb(urb, rtlusb->udev,
421 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
422 skb->data, min(skb_tailroom(skb),
423 (int)rtlusb->rx_max_size),
424 _rtl_rx_completed, skb);
425
426 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
427 return skb;
428 }
429
430 #undef __RADIO_TAP_SIZE_RSV
431
432 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
433 struct sk_buff *skb)
434 {
435 struct rtl_priv *rtlpriv = rtl_priv(hw);
436 u8 *rxdesc = skb->data;
437 struct ieee80211_hdr *hdr;
438 bool unicast = false;
439 __le16 fc;
440 struct ieee80211_rx_status rx_status = {0};
441 struct rtl_stats stats = {
442 .signal = 0,
443 .noise = -98,
444 .rate = 0,
445 };
446
447 skb_pull(skb, RTL_RX_DESC_SIZE);
448 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
449 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
450 hdr = (struct ieee80211_hdr *)(skb->data);
451 fc = hdr->frame_control;
452 if (!stats.crc) {
453 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
454
455 if (is_broadcast_ether_addr(hdr->addr1)) {
456 /*TODO*/;
457 } else if (is_multicast_ether_addr(hdr->addr1)) {
458 /*TODO*/
459 } else {
460 unicast = true;
461 rtlpriv->stats.rxbytesunicast += skb->len;
462 }
463
464 rtl_is_special_data(hw, skb, false);
465
466 if (ieee80211_is_data(fc)) {
467 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
468
469 if (unicast)
470 rtlpriv->link_info.num_rx_inperiod++;
471 }
472 }
473 }
474
475 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
476 struct sk_buff *skb)
477 {
478 struct rtl_priv *rtlpriv = rtl_priv(hw);
479 u8 *rxdesc = skb->data;
480 struct ieee80211_hdr *hdr;
481 bool unicast = false;
482 __le16 fc;
483 struct ieee80211_rx_status rx_status = {0};
484 struct rtl_stats stats = {
485 .signal = 0,
486 .noise = -98,
487 .rate = 0,
488 };
489
490 skb_pull(skb, RTL_RX_DESC_SIZE);
491 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
492 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
493 hdr = (struct ieee80211_hdr *)(skb->data);
494 fc = hdr->frame_control;
495 if (!stats.crc) {
496 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
497
498 if (is_broadcast_ether_addr(hdr->addr1)) {
499 /*TODO*/;
500 } else if (is_multicast_ether_addr(hdr->addr1)) {
501 /*TODO*/
502 } else {
503 unicast = true;
504 rtlpriv->stats.rxbytesunicast += skb->len;
505 }
506
507 rtl_is_special_data(hw, skb, false);
508
509 if (ieee80211_is_data(fc)) {
510 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
511
512 if (unicast)
513 rtlpriv->link_info.num_rx_inperiod++;
514 }
515 if (likely(rtl_action_proc(hw, skb, false))) {
516 struct sk_buff *uskb = NULL;
517 u8 *pdata;
518
519 uskb = dev_alloc_skb(skb->len + 128);
520 if (uskb) { /* drop packet on allocation failure */
521 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
522 sizeof(rx_status));
523 pdata = (u8 *)skb_put(uskb, skb->len);
524 memcpy(pdata, skb->data, skb->len);
525 ieee80211_rx_irqsafe(hw, uskb);
526 }
527 dev_kfree_skb_any(skb);
528 } else {
529 dev_kfree_skb_any(skb);
530 }
531 }
532 }
533
534 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
535 {
536 struct sk_buff *_skb;
537 struct sk_buff_head rx_queue;
538 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
539
540 skb_queue_head_init(&rx_queue);
541 if (rtlusb->usb_rx_segregate_hdl)
542 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
543 WARN_ON(skb_queue_empty(&rx_queue));
544 while (!skb_queue_empty(&rx_queue)) {
545 _skb = skb_dequeue(&rx_queue);
546 _rtl_usb_rx_process_agg(hw, skb);
547 ieee80211_rx_irqsafe(hw, skb);
548 }
549 }
550
551 static void _rtl_rx_completed(struct urb *_urb)
552 {
553 struct sk_buff *skb = (struct sk_buff *)_urb->context;
554 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
555 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
556 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
557 struct rtl_priv *rtlpriv = rtl_priv(hw);
558 int err = 0;
559
560 if (unlikely(IS_USB_STOP(rtlusb)))
561 goto free;
562
563 if (likely(0 == _urb->status)) {
564 /* If this code were moved to work queue, would CPU
565 * utilization be improved? NOTE: We shall allocate another skb
566 * and reuse the original one.
567 */
568 skb_put(skb, _urb->actual_length);
569
570 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
571 struct sk_buff *_skb;
572 _rtl_usb_rx_process_noagg(hw, skb);
573 _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
574 if (IS_ERR(_skb)) {
575 err = PTR_ERR(_skb);
576 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
577 "Can't allocate skb for bulk IN!\n");
578 return;
579 }
580 skb = _skb;
581 } else{
582 /* TO DO */
583 _rtl_rx_pre_process(hw, skb);
584 pr_err("rx agg not supported\n");
585 }
586 goto resubmit;
587 }
588
589 switch (_urb->status) {
590 /* disconnect */
591 case -ENOENT:
592 case -ECONNRESET:
593 case -ENODEV:
594 case -ESHUTDOWN:
595 goto free;
596 default:
597 break;
598 }
599
600 resubmit:
601 skb_reset_tail_pointer(skb);
602 skb_trim(skb, 0);
603
604 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
605 err = usb_submit_urb(_urb, GFP_ATOMIC);
606 if (unlikely(err)) {
607 usb_unanchor_urb(_urb);
608 goto free;
609 }
610 return;
611
612 free:
613 dev_kfree_skb_irq(skb);
614 }
615
616 static int _rtl_usb_receive(struct ieee80211_hw *hw)
617 {
618 struct urb *urb;
619 struct sk_buff *skb;
620 int err;
621 int i;
622 struct rtl_priv *rtlpriv = rtl_priv(hw);
623 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
624
625 WARN_ON(0 == rtlusb->rx_urb_num);
626 /* 1600 == 1514 + max WLAN header + rtk info */
627 WARN_ON(rtlusb->rx_max_size < 1600);
628
629 for (i = 0; i < rtlusb->rx_urb_num; i++) {
630 err = -ENOMEM;
631 urb = usb_alloc_urb(0, GFP_KERNEL);
632 if (!urb) {
633 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
634 "Failed to alloc URB!!\n");
635 goto err_out;
636 }
637
638 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
639 if (IS_ERR(skb)) {
640 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
641 "Failed to prep_rx_urb!!\n");
642 err = PTR_ERR(skb);
643 goto err_out;
644 }
645
646 usb_anchor_urb(urb, &rtlusb->rx_submitted);
647 err = usb_submit_urb(urb, GFP_KERNEL);
648 if (err)
649 goto err_out;
650 usb_free_urb(urb);
651 }
652 return 0;
653
654 err_out:
655 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
656 return err;
657 }
658
659 static int rtl_usb_start(struct ieee80211_hw *hw)
660 {
661 int err;
662 struct rtl_priv *rtlpriv = rtl_priv(hw);
663 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
664 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
665
666 err = rtlpriv->cfg->ops->hw_init(hw);
667 if (!err) {
668 rtl_init_rx_config(hw);
669
670 /* Enable software */
671 SET_USB_START(rtlusb);
672 /* should after adapter start and interrupt enable. */
673 set_hal_start(rtlhal);
674
675 /* Start bulk IN */
676 _rtl_usb_receive(hw);
677 }
678
679 return err;
680 }
681 /**
682 *
683 *
684 */
685
686 /*======================= tx =========================================*/
687 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
688 {
689 u32 i;
690 struct sk_buff *_skb;
691 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
692 struct ieee80211_tx_info *txinfo;
693
694 SET_USB_STOP(rtlusb);
695
696 /* clean up rx stuff. */
697 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
698
699 /* clean up tx stuff */
700 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
701 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
702 rtlusb->usb_tx_cleanup(hw, _skb);
703 txinfo = IEEE80211_SKB_CB(_skb);
704 ieee80211_tx_info_clear_status(txinfo);
705 txinfo->flags |= IEEE80211_TX_STAT_ACK;
706 ieee80211_tx_status_irqsafe(hw, _skb);
707 }
708 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
709 }
710 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
711 }
712
713 /**
714 *
715 * We may add some struct into struct rtl_usb later. Do deinit here.
716 *
717 */
718 static void rtl_usb_deinit(struct ieee80211_hw *hw)
719 {
720 rtl_usb_cleanup(hw);
721 }
722
723 static void rtl_usb_stop(struct ieee80211_hw *hw)
724 {
725 struct rtl_priv *rtlpriv = rtl_priv(hw);
726 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
727 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
728
729 /* should after adapter start and interrupt enable. */
730 set_hal_stop(rtlhal);
731 /* Enable software */
732 SET_USB_STOP(rtlusb);
733 rtl_usb_deinit(hw);
734 rtlpriv->cfg->ops->hw_disable(hw);
735 }
736
737 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
738 {
739 int err;
740 struct rtl_priv *rtlpriv = rtl_priv(hw);
741 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
742
743 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
744 err = usb_submit_urb(_urb, GFP_ATOMIC);
745 if (err < 0) {
746 struct sk_buff *skb;
747
748 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
749 "Failed to submit urb\n");
750 usb_unanchor_urb(_urb);
751 skb = (struct sk_buff *)_urb->context;
752 kfree_skb(skb);
753 }
754 usb_free_urb(_urb);
755 }
756
757 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
758 struct sk_buff *skb)
759 {
760 struct rtl_priv *rtlpriv = rtl_priv(hw);
761 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
762 struct ieee80211_tx_info *txinfo;
763
764 rtlusb->usb_tx_post_hdl(hw, urb, skb);
765 skb_pull(skb, RTL_TX_HEADER_SIZE);
766 txinfo = IEEE80211_SKB_CB(skb);
767 ieee80211_tx_info_clear_status(txinfo);
768 txinfo->flags |= IEEE80211_TX_STAT_ACK;
769
770 if (urb->status) {
771 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
772 "Urb has error status 0x%X\n", urb->status);
773 goto out;
774 }
775 /* TODO: statistics */
776 out:
777 ieee80211_tx_status_irqsafe(hw, skb);
778 return urb->status;
779 }
780
781 static void _rtl_tx_complete(struct urb *urb)
782 {
783 struct sk_buff *skb = (struct sk_buff *)urb->context;
784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
785 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
786 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
787 int err;
788
789 if (unlikely(IS_USB_STOP(rtlusb)))
790 return;
791 err = _usb_tx_post(hw, urb, skb);
792 if (err) {
793 /* Ignore error and keep issuiing other urbs */
794 return;
795 }
796 }
797
798 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
799 struct sk_buff *skb, u32 ep_num)
800 {
801 struct rtl_priv *rtlpriv = rtl_priv(hw);
802 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
803 struct urb *_urb;
804
805 WARN_ON(NULL == skb);
806 _urb = usb_alloc_urb(0, GFP_ATOMIC);
807 if (!_urb) {
808 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
809 "Can't allocate URB for bulk out!\n");
810 kfree_skb(skb);
811 return NULL;
812 }
813 _rtl_install_trx_info(rtlusb, skb, ep_num);
814 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
815 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
816 _urb->transfer_flags |= URB_ZERO_PACKET;
817 return _urb;
818 }
819
820 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
821 enum rtl_txq qnum)
822 {
823 struct rtl_priv *rtlpriv = rtl_priv(hw);
824 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
825 u32 ep_num;
826 struct urb *_urb = NULL;
827 struct sk_buff *_skb = NULL;
828 struct sk_buff_head *skb_list;
829 struct usb_anchor *urb_list;
830
831 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
832 if (unlikely(IS_USB_STOP(rtlusb))) {
833 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
834 "USB device is stopping...\n");
835 kfree_skb(skb);
836 return;
837 }
838 ep_num = rtlusb->ep_map.ep_mapping[qnum];
839 skb_list = &rtlusb->tx_skb_queue[ep_num];
840 _skb = skb;
841 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
842 if (unlikely(!_urb)) {
843 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
844 "Can't allocate urb. Drop skb!\n");
845 return;
846 }
847 urb_list = &rtlusb->tx_pending[ep_num];
848 _rtl_submit_tx_urb(hw, _urb);
849 }
850
851 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
852 struct ieee80211_sta *sta,
853 struct sk_buff *skb,
854 u16 hw_queue)
855 {
856 struct rtl_priv *rtlpriv = rtl_priv(hw);
857 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
858 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
859 struct rtl_tx_desc *pdesc = NULL;
860 struct rtl_tcb_desc tcb_desc;
861 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
862 __le16 fc = hdr->frame_control;
863 u8 *pda_addr = hdr->addr1;
864 /* ssn */
865 u8 *qc = NULL;
866 u8 tid = 0;
867 u16 seq_number = 0;
868
869 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
870 if (ieee80211_is_auth(fc)) {
871 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
872 rtl_ips_nic_on(hw);
873 }
874
875 if (rtlpriv->psc.sw_ps_enabled) {
876 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
877 !ieee80211_has_pm(fc))
878 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
879 }
880
881 rtl_action_proc(hw, skb, true);
882 if (is_multicast_ether_addr(pda_addr))
883 rtlpriv->stats.txbytesmulticast += skb->len;
884 else if (is_broadcast_ether_addr(pda_addr))
885 rtlpriv->stats.txbytesbroadcast += skb->len;
886 else
887 rtlpriv->stats.txbytesunicast += skb->len;
888 if (ieee80211_is_data_qos(fc)) {
889 qc = ieee80211_get_qos_ctl(hdr);
890 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
891 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
892 IEEE80211_SCTL_SEQ) >> 4;
893 seq_number += 1;
894 seq_number <<= 4;
895 }
896 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
897 hw_queue, &tcb_desc);
898 if (!ieee80211_has_morefrags(hdr->frame_control)) {
899 if (qc)
900 mac->tids[tid].seq_number = seq_number;
901 }
902 if (ieee80211_is_data(fc))
903 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
904 }
905
906 static int rtl_usb_tx(struct ieee80211_hw *hw,
907 struct ieee80211_sta *sta,
908 struct sk_buff *skb,
909 struct rtl_tcb_desc *dummy)
910 {
911 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
912 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
913 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
914 __le16 fc = hdr->frame_control;
915 u16 hw_queue;
916
917 if (unlikely(is_hal_stop(rtlhal)))
918 goto err_free;
919 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
920 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
921 _rtl_usb_transmit(hw, skb, hw_queue);
922 return NETDEV_TX_OK;
923
924 err_free:
925 dev_kfree_skb_any(skb);
926 return NETDEV_TX_OK;
927 }
928
929 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
930 struct ieee80211_sta *sta,
931 struct sk_buff *skb)
932 {
933 return false;
934 }
935
936 static struct rtl_intf_ops rtl_usb_ops = {
937 .adapter_start = rtl_usb_start,
938 .adapter_stop = rtl_usb_stop,
939 .adapter_tx = rtl_usb_tx,
940 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
941 };
942
943 int __devinit rtl_usb_probe(struct usb_interface *intf,
944 const struct usb_device_id *id)
945 {
946 int err;
947 struct ieee80211_hw *hw = NULL;
948 struct rtl_priv *rtlpriv = NULL;
949 struct usb_device *udev;
950 struct rtl_usb_priv *usb_priv;
951
952 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
953 sizeof(struct rtl_usb_priv), &rtl_ops);
954 if (!hw) {
955 RT_ASSERT(false, "ieee80211 alloc failed\n");
956 return -ENOMEM;
957 }
958 rtlpriv = hw->priv;
959 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
960 GFP_KERNEL);
961 if (!rtlpriv->usb_data)
962 return -ENOMEM;
963
964 /* this spin lock must be initialized early */
965 spin_lock_init(&rtlpriv->locks.usb_lock);
966
967 rtlpriv->usb_data_index = 0;
968 init_completion(&rtlpriv->firmware_loading_complete);
969 SET_IEEE80211_DEV(hw, &intf->dev);
970 udev = interface_to_usbdev(intf);
971 usb_get_dev(udev);
972 usb_priv = rtl_usbpriv(hw);
973 memset(usb_priv, 0, sizeof(*usb_priv));
974 usb_priv->dev.intf = intf;
975 usb_priv->dev.udev = udev;
976 usb_set_intfdata(intf, hw);
977 /* init cfg & intf_ops */
978 rtlpriv->rtlhal.interface = INTF_USB;
979 rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
980 rtlpriv->intf_ops = &rtl_usb_ops;
981 rtl_dbgp_flag_init(hw);
982 /* Init IO handler */
983 _rtl_usb_io_handler_init(&udev->dev, hw);
984 rtlpriv->cfg->ops->read_chip_version(hw);
985 /*like read eeprom and so on */
986 rtlpriv->cfg->ops->read_eeprom_info(hw);
987 err = _rtl_usb_init(hw);
988 if (err)
989 goto error_out;
990 rtl_usb_init_sw(hw);
991 /* Init mac80211 sw */
992 err = rtl_init_core(hw);
993 if (err) {
994 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
995 "Can't allocate sw for mac80211\n");
996 goto error_out;
997 }
998 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
999 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1000 goto error_out;
1001 }
1002 rtlpriv->cfg->ops->init_sw_leds(hw);
1003
1004 return 0;
1005 error_out:
1006 rtl_deinit_core(hw);
1007 _rtl_usb_io_handler_release(hw);
1008 usb_put_dev(udev);
1009 complete(&rtlpriv->firmware_loading_complete);
1010 return -ENODEV;
1011 }
1012 EXPORT_SYMBOL(rtl_usb_probe);
1013
1014 void rtl_usb_disconnect(struct usb_interface *intf)
1015 {
1016 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1017 struct rtl_priv *rtlpriv = rtl_priv(hw);
1018 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1019 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1020
1021 if (unlikely(!rtlpriv))
1022 return;
1023
1024 /* just in case driver is removed before firmware callback */
1025 wait_for_completion(&rtlpriv->firmware_loading_complete);
1026 /*ieee80211_unregister_hw will call ops_stop */
1027 if (rtlmac->mac80211_registered == 1) {
1028 ieee80211_unregister_hw(hw);
1029 rtlmac->mac80211_registered = 0;
1030 } else {
1031 rtl_deinit_deferred_work(hw);
1032 rtlpriv->intf_ops->adapter_stop(hw);
1033 }
1034 /*deinit rfkill */
1035 /* rtl_deinit_rfkill(hw); */
1036 rtl_usb_deinit(hw);
1037 rtl_deinit_core(hw);
1038 kfree(rtlpriv->usb_data);
1039 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1040 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1041 _rtl_usb_io_handler_release(hw);
1042 usb_put_dev(rtlusb->udev);
1043 usb_set_intfdata(intf, NULL);
1044 ieee80211_free_hw(hw);
1045 }
1046 EXPORT_SYMBOL(rtl_usb_disconnect);
1047
1048 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1049 {
1050 return 0;
1051 }
1052 EXPORT_SYMBOL(rtl_usb_suspend);
1053
1054 int rtl_usb_resume(struct usb_interface *pusb_intf)
1055 {
1056 return 0;
1057 }
1058 EXPORT_SYMBOL(rtl_usb_resume);
Linux kernel - Deliverables
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