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[deliverable/linux.git] / drivers / net / wireless / rtlwifi / usb.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2009-2011 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30 #include <linux/usb.h>
31 #include <linux/export.h>
32 #include "core.h"
33 #include "wifi.h"
34 #include "usb.h"
35 #include "base.h"
36 #include "ps.h"
37 #include "rtl8192c/fw_common.h"
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 kfree(urb->context);
50 }
51
52 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
53 u16 value, u16 index, void *pdata,
54 u16 len)
55 {
56 int rc;
57 unsigned int pipe;
58 u8 reqtype;
59 struct usb_ctrlrequest *dr;
60 struct urb *urb;
61 struct rtl819x_async_write_data {
62 u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
63 struct usb_ctrlrequest dr;
64 } *buf;
65
66 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
67 reqtype = REALTEK_USB_VENQT_WRITE;
68
69 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
70 if (!buf)
71 return -ENOMEM;
72
73 urb = usb_alloc_urb(0, GFP_ATOMIC);
74 if (!urb) {
75 kfree(buf);
76 return -ENOMEM;
77 }
78
79 dr = &buf->dr;
80
81 dr->bRequestType = reqtype;
82 dr->bRequest = request;
83 dr->wValue = cpu_to_le16(value);
84 dr->wIndex = cpu_to_le16(index);
85 dr->wLength = cpu_to_le16(len);
86 /* data are already in little-endian order */
87 memcpy(buf, pdata, len);
88 usb_fill_control_urb(urb, udev, pipe,
89 (unsigned char *)dr, buf, len,
90 usbctrl_async_callback, buf);
91 rc = usb_submit_urb(urb, GFP_ATOMIC);
92 if (rc < 0)
93 kfree(buf);
94 usb_free_urb(urb);
95 return rc;
96 }
97
98 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
99 u16 value, u16 index, void *pdata,
100 u16 len)
101 {
102 unsigned int pipe;
103 int status;
104 u8 reqtype;
105 int vendorreq_times = 0;
106 static int count;
107
108 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
109 reqtype = REALTEK_USB_VENQT_READ;
110
111 do {
112 status = usb_control_msg(udev, pipe, request, reqtype, value,
113 index, pdata, len, 0); /*max. timeout*/
114 if (status < 0) {
115 /* firmware download is checksumed, don't retry */
116 if ((value >= FW_8192C_START_ADDRESS &&
117 value <= FW_8192C_END_ADDRESS))
118 break;
119 } else {
120 break;
121 }
122 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
123
124 if (status < 0 && count++ < 4)
125 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
126 value, status, le32_to_cpu(*(u32 *)pdata));
127 return status;
128 }
129
130 static u32 _usb_read_sync(struct usb_device *udev, u32 addr, u16 len)
131 {
132 u8 request;
133 u16 wvalue;
134 u16 index;
135 u32 *data;
136 u32 ret;
137
138 data = kmalloc(sizeof(u32), GFP_KERNEL);
139 if (!data)
140 return -ENOMEM;
141 request = REALTEK_USB_VENQT_CMD_REQ;
142 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
143
144 wvalue = (u16)addr;
145 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
146 ret = le32_to_cpu(*data);
147 kfree(data);
148 return ret;
149 }
150
151 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
152 {
153 struct device *dev = rtlpriv->io.dev;
154
155 return (u8)_usb_read_sync(to_usb_device(dev), addr, 1);
156 }
157
158 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
159 {
160 struct device *dev = rtlpriv->io.dev;
161
162 return (u16)_usb_read_sync(to_usb_device(dev), addr, 2);
163 }
164
165 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
166 {
167 struct device *dev = rtlpriv->io.dev;
168
169 return _usb_read_sync(to_usb_device(dev), addr, 4);
170 }
171
172 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
173 u16 len)
174 {
175 u8 request;
176 u16 wvalue;
177 u16 index;
178 __le32 data;
179
180 request = REALTEK_USB_VENQT_CMD_REQ;
181 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
182 wvalue = (u16)(addr&0x0000ffff);
183 data = cpu_to_le32(val);
184 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
185 len);
186 }
187
188 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
189 {
190 struct device *dev = rtlpriv->io.dev;
191
192 _usb_write_async(to_usb_device(dev), addr, val, 1);
193 }
194
195 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
196 {
197 struct device *dev = rtlpriv->io.dev;
198
199 _usb_write_async(to_usb_device(dev), addr, val, 2);
200 }
201
202 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
203 {
204 struct device *dev = rtlpriv->io.dev;
205
206 _usb_write_async(to_usb_device(dev), addr, val, 4);
207 }
208
209 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
210 u16 len)
211 {
212 struct device *dev = rtlpriv->io.dev;
213 struct usb_device *udev = to_usb_device(dev);
214 u8 request = REALTEK_USB_VENQT_CMD_REQ;
215 u8 reqtype = REALTEK_USB_VENQT_WRITE;
216 u16 wvalue;
217 u16 index = REALTEK_USB_VENQT_CMD_IDX;
218 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
219 u8 *buffer;
220 dma_addr_t dma_addr;
221
222 wvalue = (u16)(addr&0x0000ffff);
223 buffer = usb_alloc_coherent(udev, (size_t)len, GFP_ATOMIC, &dma_addr);
224 if (!buffer)
225 return;
226 memcpy(buffer, data, len);
227 usb_control_msg(udev, pipe, request, reqtype, wvalue,
228 index, buffer, len, 50);
229
230 usb_free_coherent(udev, (size_t)len, buffer, dma_addr);
231 }
232
233 static void _rtl_usb_io_handler_init(struct device *dev,
234 struct ieee80211_hw *hw)
235 {
236 struct rtl_priv *rtlpriv = rtl_priv(hw);
237
238 rtlpriv->io.dev = dev;
239 mutex_init(&rtlpriv->io.bb_mutex);
240 rtlpriv->io.write8_async = _usb_write8_async;
241 rtlpriv->io.write16_async = _usb_write16_async;
242 rtlpriv->io.write32_async = _usb_write32_async;
243 rtlpriv->io.read8_sync = _usb_read8_sync;
244 rtlpriv->io.read16_sync = _usb_read16_sync;
245 rtlpriv->io.read32_sync = _usb_read32_sync;
246 rtlpriv->io.writeN_sync = _usb_writeN_sync;
247 }
248
249 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
250 {
251 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
252
253 mutex_destroy(&rtlpriv->io.bb_mutex);
254 }
255
256 /**
257 *
258 * Default aggregation handler. Do nothing and just return the oldest skb.
259 */
260 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
261 struct sk_buff_head *list)
262 {
263 return skb_dequeue(list);
264 }
265
266 #define IS_HIGH_SPEED_USB(udev) \
267 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
268
269 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
270 {
271 u32 i;
272 struct rtl_priv *rtlpriv = rtl_priv(hw);
273 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
274
275 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
276 ? USB_HIGH_SPEED_BULK_SIZE
277 : USB_FULL_SPEED_BULK_SIZE;
278
279 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
280 rtlusb->max_bulk_out_size);
281
282 for (i = 0; i < __RTL_TXQ_NUM; i++) {
283 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
284 if (!ep_num) {
285 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
286 "Invalid endpoint map setting!\n");
287 return -EINVAL;
288 }
289 }
290
291 rtlusb->usb_tx_post_hdl =
292 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
293 rtlusb->usb_tx_cleanup =
294 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
295 rtlusb->usb_tx_aggregate_hdl =
296 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
297 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
298 : &_none_usb_tx_aggregate_hdl;
299
300 init_usb_anchor(&rtlusb->tx_submitted);
301 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
302 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
303 init_usb_anchor(&rtlusb->tx_pending[i]);
304 }
305 return 0;
306 }
307
308 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
309 {
310 struct rtl_priv *rtlpriv = rtl_priv(hw);
311 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
312 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
313
314 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
315 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
316 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
317 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
318 rtlusb->usb_rx_segregate_hdl =
319 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
320
321 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
322 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
323 init_usb_anchor(&rtlusb->rx_submitted);
324 return 0;
325 }
326
327 static int _rtl_usb_init(struct ieee80211_hw *hw)
328 {
329 struct rtl_priv *rtlpriv = rtl_priv(hw);
330 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
331 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
332 int err;
333 u8 epidx;
334 struct usb_interface *usb_intf = rtlusb->intf;
335 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
336
337 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
338 for (epidx = 0; epidx < epnums; epidx++) {
339 struct usb_endpoint_descriptor *pep_desc;
340 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
341
342 if (usb_endpoint_dir_in(pep_desc))
343 rtlusb->in_ep_nums++;
344 else if (usb_endpoint_dir_out(pep_desc))
345 rtlusb->out_ep_nums++;
346
347 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
348 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
349 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
350 pep_desc->bInterval);
351 }
352 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num)
353 return -EINVAL ;
354
355 /* usb endpoint mapping */
356 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
357 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
358 _rtl_usb_init_tx(hw);
359 _rtl_usb_init_rx(hw);
360 return err;
361 }
362
363 static int _rtl_usb_init_sw(struct ieee80211_hw *hw)
364 {
365 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
366 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
367 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
368 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
369
370 rtlhal->hw = hw;
371 ppsc->inactiveps = false;
372 ppsc->leisure_ps = false;
373 ppsc->fwctrl_lps = false;
374 ppsc->reg_fwctrl_lps = 3;
375 ppsc->reg_max_lps_awakeintvl = 5;
376 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
377
378 /* IBSS */
379 mac->beacon_interval = 100;
380
381 /* AMPDU */
382 mac->min_space_cfg = 0;
383 mac->max_mss_density = 0;
384
385 /* set sane AMPDU defaults */
386 mac->current_ampdu_density = 7;
387 mac->current_ampdu_factor = 3;
388
389 /* QOS */
390 rtlusb->acm_method = eAcmWay2_SW;
391
392 /* IRQ */
393 /* HIMR - turn all on */
394 rtlusb->irq_mask[0] = 0xFFFFFFFF;
395 /* HIMR_EX - turn all on */
396 rtlusb->irq_mask[1] = 0xFFFFFFFF;
397 rtlusb->disableHWSM = true;
398 return 0;
399 }
400
401 #define __RADIO_TAP_SIZE_RSV 32
402
403 static void _rtl_rx_completed(struct urb *urb);
404
405 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
406 struct rtl_usb *rtlusb,
407 struct urb *urb,
408 gfp_t gfp_mask)
409 {
410 struct sk_buff *skb;
411 struct rtl_priv *rtlpriv = rtl_priv(hw);
412
413 skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
414 gfp_mask);
415 if (!skb) {
416 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
417 "Failed to __dev_alloc_skb!!\n");
418 return ERR_PTR(-ENOMEM);
419 }
420
421 /* reserve some space for mac80211's radiotap */
422 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
423 usb_fill_bulk_urb(urb, rtlusb->udev,
424 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
425 skb->data, min(skb_tailroom(skb),
426 (int)rtlusb->rx_max_size),
427 _rtl_rx_completed, skb);
428
429 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
430 return skb;
431 }
432
433 #undef __RADIO_TAP_SIZE_RSV
434
435 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
436 struct sk_buff *skb)
437 {
438 struct rtl_priv *rtlpriv = rtl_priv(hw);
439 u8 *rxdesc = skb->data;
440 struct ieee80211_hdr *hdr;
441 bool unicast = false;
442 __le16 fc;
443 struct ieee80211_rx_status rx_status = {0};
444 struct rtl_stats stats = {
445 .signal = 0,
446 .noise = -98,
447 .rate = 0,
448 };
449
450 skb_pull(skb, RTL_RX_DESC_SIZE);
451 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
452 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
453 hdr = (struct ieee80211_hdr *)(skb->data);
454 fc = hdr->frame_control;
455 if (!stats.crc) {
456 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
457
458 if (is_broadcast_ether_addr(hdr->addr1)) {
459 /*TODO*/;
460 } else if (is_multicast_ether_addr(hdr->addr1)) {
461 /*TODO*/
462 } else {
463 unicast = true;
464 rtlpriv->stats.rxbytesunicast += skb->len;
465 }
466
467 rtl_is_special_data(hw, skb, false);
468
469 if (ieee80211_is_data(fc)) {
470 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
471
472 if (unicast)
473 rtlpriv->link_info.num_rx_inperiod++;
474 }
475 }
476 }
477
478 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
479 struct sk_buff *skb)
480 {
481 struct rtl_priv *rtlpriv = rtl_priv(hw);
482 u8 *rxdesc = skb->data;
483 struct ieee80211_hdr *hdr;
484 bool unicast = false;
485 __le16 fc;
486 struct ieee80211_rx_status rx_status = {0};
487 struct rtl_stats stats = {
488 .signal = 0,
489 .noise = -98,
490 .rate = 0,
491 };
492
493 skb_pull(skb, RTL_RX_DESC_SIZE);
494 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
495 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
496 hdr = (struct ieee80211_hdr *)(skb->data);
497 fc = hdr->frame_control;
498 if (!stats.crc) {
499 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
500
501 if (is_broadcast_ether_addr(hdr->addr1)) {
502 /*TODO*/;
503 } else if (is_multicast_ether_addr(hdr->addr1)) {
504 /*TODO*/
505 } else {
506 unicast = true;
507 rtlpriv->stats.rxbytesunicast += skb->len;
508 }
509
510 rtl_is_special_data(hw, skb, false);
511
512 if (ieee80211_is_data(fc)) {
513 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
514
515 if (unicast)
516 rtlpriv->link_info.num_rx_inperiod++;
517 }
518 if (likely(rtl_action_proc(hw, skb, false))) {
519 struct sk_buff *uskb = NULL;
520 u8 *pdata;
521
522 uskb = dev_alloc_skb(skb->len + 128);
523 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
524 sizeof(rx_status));
525 pdata = (u8 *)skb_put(uskb, skb->len);
526 memcpy(pdata, skb->data, skb->len);
527 dev_kfree_skb_any(skb);
528 ieee80211_rx_irqsafe(hw, uskb);
529 } else {
530 dev_kfree_skb_any(skb);
531 }
532 }
533 }
534
535 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
536 {
537 struct sk_buff *_skb;
538 struct sk_buff_head rx_queue;
539 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
540
541 skb_queue_head_init(&rx_queue);
542 if (rtlusb->usb_rx_segregate_hdl)
543 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
544 WARN_ON(skb_queue_empty(&rx_queue));
545 while (!skb_queue_empty(&rx_queue)) {
546 _skb = skb_dequeue(&rx_queue);
547 _rtl_usb_rx_process_agg(hw, skb);
548 ieee80211_rx_irqsafe(hw, skb);
549 }
550 }
551
552 static void _rtl_rx_completed(struct urb *_urb)
553 {
554 struct sk_buff *skb = (struct sk_buff *)_urb->context;
555 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
556 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
557 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
558 struct rtl_priv *rtlpriv = rtl_priv(hw);
559 int err = 0;
560
561 if (unlikely(IS_USB_STOP(rtlusb)))
562 goto free;
563
564 if (likely(0 == _urb->status)) {
565 /* If this code were moved to work queue, would CPU
566 * utilization be improved? NOTE: We shall allocate another skb
567 * and reuse the original one.
568 */
569 skb_put(skb, _urb->actual_length);
570
571 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
572 struct sk_buff *_skb;
573 _rtl_usb_rx_process_noagg(hw, skb);
574 _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
575 if (IS_ERR(_skb)) {
576 err = PTR_ERR(_skb);
577 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
578 "Can't allocate skb for bulk IN!\n");
579 return;
580 }
581 skb = _skb;
582 } else{
583 /* TO DO */
584 _rtl_rx_pre_process(hw, skb);
585 pr_err("rx agg not supported\n");
586 }
587 goto resubmit;
588 }
589
590 switch (_urb->status) {
591 /* disconnect */
592 case -ENOENT:
593 case -ECONNRESET:
594 case -ENODEV:
595 case -ESHUTDOWN:
596 goto free;
597 default:
598 break;
599 }
600
601 resubmit:
602 skb_reset_tail_pointer(skb);
603 skb_trim(skb, 0);
604
605 usb_anchor_urb(_urb, &rtlusb->rx_submitted);
606 err = usb_submit_urb(_urb, GFP_ATOMIC);
607 if (unlikely(err)) {
608 usb_unanchor_urb(_urb);
609 goto free;
610 }
611 return;
612
613 free:
614 dev_kfree_skb_irq(skb);
615 }
616
617 static int _rtl_usb_receive(struct ieee80211_hw *hw)
618 {
619 struct urb *urb;
620 struct sk_buff *skb;
621 int err;
622 int i;
623 struct rtl_priv *rtlpriv = rtl_priv(hw);
624 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
625
626 WARN_ON(0 == rtlusb->rx_urb_num);
627 /* 1600 == 1514 + max WLAN header + rtk info */
628 WARN_ON(rtlusb->rx_max_size < 1600);
629
630 for (i = 0; i < rtlusb->rx_urb_num; i++) {
631 err = -ENOMEM;
632 urb = usb_alloc_urb(0, GFP_KERNEL);
633 if (!urb) {
634 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
635 "Failed to alloc URB!!\n");
636 goto err_out;
637 }
638
639 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
640 if (IS_ERR(skb)) {
641 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
642 "Failed to prep_rx_urb!!\n");
643 err = PTR_ERR(skb);
644 goto err_out;
645 }
646
647 usb_anchor_urb(urb, &rtlusb->rx_submitted);
648 err = usb_submit_urb(urb, GFP_KERNEL);
649 if (err)
650 goto err_out;
651 usb_free_urb(urb);
652 }
653 return 0;
654
655 err_out:
656 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
657 return err;
658 }
659
660 static int rtl_usb_start(struct ieee80211_hw *hw)
661 {
662 int err;
663 struct rtl_priv *rtlpriv = rtl_priv(hw);
664 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
665 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
666
667 err = rtlpriv->cfg->ops->hw_init(hw);
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 return err;
679 }
680 /**
681 *
682 *
683 */
684
685 /*======================= tx =========================================*/
686 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
687 {
688 u32 i;
689 struct sk_buff *_skb;
690 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
691 struct ieee80211_tx_info *txinfo;
692
693 SET_USB_STOP(rtlusb);
694
695 /* clean up rx stuff. */
696 usb_kill_anchored_urbs(&rtlusb->rx_submitted);
697
698 /* clean up tx stuff */
699 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
700 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
701 rtlusb->usb_tx_cleanup(hw, _skb);
702 txinfo = IEEE80211_SKB_CB(_skb);
703 ieee80211_tx_info_clear_status(txinfo);
704 txinfo->flags |= IEEE80211_TX_STAT_ACK;
705 ieee80211_tx_status_irqsafe(hw, _skb);
706 }
707 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
708 }
709 usb_kill_anchored_urbs(&rtlusb->tx_submitted);
710 }
711
712 /**
713 *
714 * We may add some struct into struct rtl_usb later. Do deinit here.
715 *
716 */
717 static void rtl_usb_deinit(struct ieee80211_hw *hw)
718 {
719 rtl_usb_cleanup(hw);
720 }
721
722 static void rtl_usb_stop(struct ieee80211_hw *hw)
723 {
724 struct rtl_priv *rtlpriv = rtl_priv(hw);
725 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
726 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
727
728 /* should after adapter start and interrupt enable. */
729 set_hal_stop(rtlhal);
730 /* Enable software */
731 SET_USB_STOP(rtlusb);
732 rtl_usb_deinit(hw);
733 rtlpriv->cfg->ops->hw_disable(hw);
734 }
735
736 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
737 {
738 int err;
739 struct rtl_priv *rtlpriv = rtl_priv(hw);
740 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
741
742 usb_anchor_urb(_urb, &rtlusb->tx_submitted);
743 err = usb_submit_urb(_urb, GFP_ATOMIC);
744 if (err < 0) {
745 struct sk_buff *skb;
746
747 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
748 "Failed to submit urb\n");
749 usb_unanchor_urb(_urb);
750 skb = (struct sk_buff *)_urb->context;
751 kfree_skb(skb);
752 }
753 usb_free_urb(_urb);
754 }
755
756 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
757 struct sk_buff *skb)
758 {
759 struct rtl_priv *rtlpriv = rtl_priv(hw);
760 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
761 struct ieee80211_tx_info *txinfo;
762
763 rtlusb->usb_tx_post_hdl(hw, urb, skb);
764 skb_pull(skb, RTL_TX_HEADER_SIZE);
765 txinfo = IEEE80211_SKB_CB(skb);
766 ieee80211_tx_info_clear_status(txinfo);
767 txinfo->flags |= IEEE80211_TX_STAT_ACK;
768
769 if (urb->status) {
770 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
771 "Urb has error status 0x%X\n", urb->status);
772 goto out;
773 }
774 /* TODO: statistics */
775 out:
776 ieee80211_tx_status_irqsafe(hw, skb);
777 return urb->status;
778 }
779
780 static void _rtl_tx_complete(struct urb *urb)
781 {
782 struct sk_buff *skb = (struct sk_buff *)urb->context;
783 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
784 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
785 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
786 int err;
787
788 if (unlikely(IS_USB_STOP(rtlusb)))
789 return;
790 err = _usb_tx_post(hw, urb, skb);
791 if (err) {
792 /* Ignore error and keep issuiing other urbs */
793 return;
794 }
795 }
796
797 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
798 struct sk_buff *skb, u32 ep_num)
799 {
800 struct rtl_priv *rtlpriv = rtl_priv(hw);
801 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
802 struct urb *_urb;
803
804 WARN_ON(NULL == skb);
805 _urb = usb_alloc_urb(0, GFP_ATOMIC);
806 if (!_urb) {
807 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
808 "Can't allocate URB for bulk out!\n");
809 kfree_skb(skb);
810 return NULL;
811 }
812 _rtl_install_trx_info(rtlusb, skb, ep_num);
813 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
814 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
815 _urb->transfer_flags |= URB_ZERO_PACKET;
816 return _urb;
817 }
818
819 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
820 enum rtl_txq qnum)
821 {
822 struct rtl_priv *rtlpriv = rtl_priv(hw);
823 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
824 u32 ep_num;
825 struct urb *_urb = NULL;
826 struct sk_buff *_skb = NULL;
827 struct sk_buff_head *skb_list;
828 struct usb_anchor *urb_list;
829
830 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
831 if (unlikely(IS_USB_STOP(rtlusb))) {
832 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
833 "USB device is stopping...\n");
834 kfree_skb(skb);
835 return;
836 }
837 ep_num = rtlusb->ep_map.ep_mapping[qnum];
838 skb_list = &rtlusb->tx_skb_queue[ep_num];
839 _skb = skb;
840 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
841 if (unlikely(!_urb)) {
842 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
843 "Can't allocate urb. Drop skb!\n");
844 return;
845 }
846 urb_list = &rtlusb->tx_pending[ep_num];
847 _rtl_submit_tx_urb(hw, _urb);
848 }
849
850 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
851 u16 hw_queue)
852 {
853 struct rtl_priv *rtlpriv = rtl_priv(hw);
854 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
855 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
856 struct rtl_tx_desc *pdesc = NULL;
857 struct rtl_tcb_desc tcb_desc;
858 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
859 __le16 fc = hdr->frame_control;
860 u8 *pda_addr = hdr->addr1;
861 /* ssn */
862 u8 *qc = NULL;
863 u8 tid = 0;
864 u16 seq_number = 0;
865
866 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
867 if (ieee80211_is_auth(fc)) {
868 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
869 rtl_ips_nic_on(hw);
870 }
871
872 if (rtlpriv->psc.sw_ps_enabled) {
873 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
874 !ieee80211_has_pm(fc))
875 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
876 }
877
878 rtl_action_proc(hw, skb, true);
879 if (is_multicast_ether_addr(pda_addr))
880 rtlpriv->stats.txbytesmulticast += skb->len;
881 else if (is_broadcast_ether_addr(pda_addr))
882 rtlpriv->stats.txbytesbroadcast += skb->len;
883 else
884 rtlpriv->stats.txbytesunicast += skb->len;
885 if (ieee80211_is_data_qos(fc)) {
886 qc = ieee80211_get_qos_ctl(hdr);
887 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
888 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
889 IEEE80211_SCTL_SEQ) >> 4;
890 seq_number += 1;
891 seq_number <<= 4;
892 }
893 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
894 hw_queue, &tcb_desc);
895 if (!ieee80211_has_morefrags(hdr->frame_control)) {
896 if (qc)
897 mac->tids[tid].seq_number = seq_number;
898 }
899 if (ieee80211_is_data(fc))
900 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
901 }
902
903 static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
904 struct rtl_tcb_desc *dummy)
905 {
906 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
907 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
908 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
909 __le16 fc = hdr->frame_control;
910 u16 hw_queue;
911
912 if (unlikely(is_hal_stop(rtlhal)))
913 goto err_free;
914 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
915 _rtl_usb_tx_preprocess(hw, skb, hw_queue);
916 _rtl_usb_transmit(hw, skb, hw_queue);
917 return NETDEV_TX_OK;
918
919 err_free:
920 dev_kfree_skb_any(skb);
921 return NETDEV_TX_OK;
922 }
923
924 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
925 struct sk_buff *skb)
926 {
927 return false;
928 }
929
930 static struct rtl_intf_ops rtl_usb_ops = {
931 .adapter_start = rtl_usb_start,
932 .adapter_stop = rtl_usb_stop,
933 .adapter_tx = rtl_usb_tx,
934 .waitq_insert = rtl_usb_tx_chk_waitq_insert,
935 };
936
937 int __devinit rtl_usb_probe(struct usb_interface *intf,
938 const struct usb_device_id *id)
939 {
940 int err;
941 struct ieee80211_hw *hw = NULL;
942 struct rtl_priv *rtlpriv = NULL;
943 struct usb_device *udev;
944 struct rtl_usb_priv *usb_priv;
945
946 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
947 sizeof(struct rtl_usb_priv), &rtl_ops);
948 if (!hw) {
949 RT_ASSERT(false, ("%s : ieee80211 alloc failed\n", __func__));
950 return -ENOMEM;
951 }
952 rtlpriv = hw->priv;
953 SET_IEEE80211_DEV(hw, &intf->dev);
954 udev = interface_to_usbdev(intf);
955 usb_get_dev(udev);
956 usb_priv = rtl_usbpriv(hw);
957 memset(usb_priv, 0, sizeof(*usb_priv));
958 usb_priv->dev.intf = intf;
959 usb_priv->dev.udev = udev;
960 usb_set_intfdata(intf, hw);
961 /* init cfg & intf_ops */
962 rtlpriv->rtlhal.interface = INTF_USB;
963 rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
964 rtlpriv->intf_ops = &rtl_usb_ops;
965 rtl_dbgp_flag_init(hw);
966 /* Init IO handler */
967 _rtl_usb_io_handler_init(&udev->dev, hw);
968 rtlpriv->cfg->ops->read_chip_version(hw);
969 /*like read eeprom and so on */
970 rtlpriv->cfg->ops->read_eeprom_info(hw);
971 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
972 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
973 goto error_out;
974 }
975 rtlpriv->cfg->ops->init_sw_leds(hw);
976 err = _rtl_usb_init(hw);
977 err = _rtl_usb_init_sw(hw);
978 /* Init mac80211 sw */
979 err = rtl_init_core(hw);
980 if (err) {
981 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
982 "Can't allocate sw for mac80211\n");
983 goto error_out;
984 }
985
986 /*init rfkill */
987 /* rtl_init_rfkill(hw); */
988
989 err = ieee80211_register_hw(hw);
990 if (err) {
991 RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG,
992 "Can't register mac80211 hw\n");
993 goto error_out;
994 } else {
995 rtlpriv->mac80211.mac80211_registered = 1;
996 }
997 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
998 return 0;
999 error_out:
1000 rtl_deinit_core(hw);
1001 _rtl_usb_io_handler_release(hw);
1002 ieee80211_free_hw(hw);
1003 usb_put_dev(udev);
1004 return -ENODEV;
1005 }
1006 EXPORT_SYMBOL(rtl_usb_probe);
1007
1008 void rtl_usb_disconnect(struct usb_interface *intf)
1009 {
1010 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1011 struct rtl_priv *rtlpriv = rtl_priv(hw);
1012 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1013 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1014
1015 if (unlikely(!rtlpriv))
1016 return;
1017 /*ieee80211_unregister_hw will call ops_stop */
1018 if (rtlmac->mac80211_registered == 1) {
1019 ieee80211_unregister_hw(hw);
1020 rtlmac->mac80211_registered = 0;
1021 } else {
1022 rtl_deinit_deferred_work(hw);
1023 rtlpriv->intf_ops->adapter_stop(hw);
1024 }
1025 /*deinit rfkill */
1026 /* rtl_deinit_rfkill(hw); */
1027 rtl_usb_deinit(hw);
1028 rtl_deinit_core(hw);
1029 rtlpriv->cfg->ops->deinit_sw_leds(hw);
1030 rtlpriv->cfg->ops->deinit_sw_vars(hw);
1031 _rtl_usb_io_handler_release(hw);
1032 usb_put_dev(rtlusb->udev);
1033 usb_set_intfdata(intf, NULL);
1034 ieee80211_free_hw(hw);
1035 }
1036 EXPORT_SYMBOL(rtl_usb_disconnect);
1037
1038 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1039 {
1040 return 0;
1041 }
1042 EXPORT_SYMBOL(rtl_usb_suspend);
1043
1044 int rtl_usb_resume(struct usb_interface *pusb_intf)
1045 {
1046 return 0;
1047 }
1048 EXPORT_SYMBOL(rtl_usb_resume);
Linux kernel - Deliverables
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