1 /****************************************************************************** 2 * 3 * Copyright(c) 2009-2012 Realtek Corporation. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 * Contact Information: 22 * wlanfae <wlanfae@realtek.com> 23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, 24 * Hsinchu 300, Taiwan. 25 * 26 *****************************************************************************/ 27 28 #include "wifi.h" 29 #include "core.h" 30 #include "usb.h" 31 #include "base.h" 32 #include "ps.h" 33 #include "rtl8192c/fw_common.h" 34 #include <linux/export.h> 35 #include <linux/module.h> 36 37 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>"); 38 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>"); 39 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>"); 40 MODULE_LICENSE("GPL"); 41 MODULE_DESCRIPTION("USB basic driver for rtlwifi"); 42 43 #define REALTEK_USB_VENQT_READ 0xC0 44 #define REALTEK_USB_VENQT_WRITE 0x40 45 #define REALTEK_USB_VENQT_CMD_REQ 0x05 46 #define REALTEK_USB_VENQT_CMD_IDX 0x00 47 48 #define MAX_USBCTRL_VENDORREQ_TIMES 10 49 50 static void usbctrl_async_callback(struct urb *urb) 51 { 52 if (urb) { 53 /* free dr */ 54 kfree(urb->setup_packet); 55 /* free databuf */ 56 kfree(urb->transfer_buffer); 57 } 58 } 59 60 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request, 61 u16 value, u16 index, void *pdata, 62 u16 len) 63 { 64 int rc; 65 unsigned int pipe; 66 u8 reqtype; 67 struct usb_ctrlrequest *dr; 68 struct urb *urb; 69 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE; 70 u8 *databuf; 71 72 if (WARN_ON_ONCE(len > databuf_maxlen)) 73 len = databuf_maxlen; 74 75 pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 76 reqtype = REALTEK_USB_VENQT_WRITE; 77 78 dr = kzalloc(sizeof(*dr), GFP_ATOMIC); 79 if (!dr) 80 return -ENOMEM; 81 82 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC); 83 if (!databuf) { 84 kfree(dr); 85 return -ENOMEM; 86 } 87 88 urb = usb_alloc_urb(0, GFP_ATOMIC); 89 if (!urb) { 90 kfree(databuf); 91 kfree(dr); 92 return -ENOMEM; 93 } 94 95 dr->bRequestType = reqtype; 96 dr->bRequest = request; 97 dr->wValue = cpu_to_le16(value); 98 dr->wIndex = cpu_to_le16(index); 99 dr->wLength = cpu_to_le16(len); 100 /* data are already in little-endian order */ 101 memcpy(databuf, pdata, len); 102 usb_fill_control_urb(urb, udev, pipe, 103 (unsigned char *)dr, databuf, len, 104 usbctrl_async_callback, NULL); 105 rc = usb_submit_urb(urb, GFP_ATOMIC); 106 if (rc < 0) { 107 kfree(databuf); 108 kfree(dr); 109 } 110 usb_free_urb(urb); 111 return rc; 112 } 113 114 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, 115 u16 value, u16 index, void *pdata, 116 u16 len) 117 { 118 unsigned int pipe; 119 int status; 120 u8 reqtype; 121 int vendorreq_times = 0; 122 static int count; 123 124 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ 125 reqtype = REALTEK_USB_VENQT_READ; 126 127 do { 128 status = usb_control_msg(udev, pipe, request, reqtype, value, 129 index, pdata, len, 1000); 130 if (status < 0) { 131 /* firmware download is checksumed, don't retry */ 132 if ((value >= FW_8192C_START_ADDRESS && 133 value <= FW_8192C_END_ADDRESS)) 134 break; 135 } else { 136 break; 137 } 138 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); 139 140 if (status < 0 && count++ < 4) 141 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n", 142 value, status, *(u32 *)pdata); 143 return status; 144 } 145 146 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) 147 { 148 struct device *dev = rtlpriv->io.dev; 149 struct usb_device *udev = to_usb_device(dev); 150 u8 request; 151 u16 wvalue; 152 u16 index; 153 __le32 *data; 154 unsigned long flags; 155 156 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 157 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 158 rtlpriv->usb_data_index = 0; 159 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 160 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 161 request = REALTEK_USB_VENQT_CMD_REQ; 162 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 163 164 wvalue = (u16)addr; 165 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len); 166 return le32_to_cpu(*data); 167 } 168 169 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 170 { 171 return (u8)_usb_read_sync(rtlpriv, addr, 1); 172 } 173 174 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 175 { 176 return (u16)_usb_read_sync(rtlpriv, addr, 2); 177 } 178 179 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 180 { 181 return _usb_read_sync(rtlpriv, addr, 4); 182 } 183 184 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val, 185 u16 len) 186 { 187 u8 request; 188 u16 wvalue; 189 u16 index; 190 __le32 data; 191 192 request = REALTEK_USB_VENQT_CMD_REQ; 193 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 194 wvalue = (u16)(addr&0x0000ffff); 195 data = cpu_to_le32(val); 196 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data, 197 len); 198 } 199 200 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val) 201 { 202 struct device *dev = rtlpriv->io.dev; 203 204 _usb_write_async(to_usb_device(dev), addr, val, 1); 205 } 206 207 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val) 208 { 209 struct device *dev = rtlpriv->io.dev; 210 211 _usb_write_async(to_usb_device(dev), addr, val, 2); 212 } 213 214 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val) 215 { 216 struct device *dev = rtlpriv->io.dev; 217 218 _usb_write_async(to_usb_device(dev), addr, val, 4); 219 } 220 221 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data, 222 u16 len) 223 { 224 struct device *dev = rtlpriv->io.dev; 225 struct usb_device *udev = to_usb_device(dev); 226 u8 request = REALTEK_USB_VENQT_CMD_REQ; 227 u8 reqtype = REALTEK_USB_VENQT_WRITE; 228 u16 wvalue; 229 u16 index = REALTEK_USB_VENQT_CMD_IDX; 230 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 231 u8 *buffer; 232 233 wvalue = (u16)(addr & 0x0000ffff); 234 buffer = kmemdup(data, len, GFP_ATOMIC); 235 if (!buffer) 236 return; 237 usb_control_msg(udev, pipe, request, reqtype, wvalue, 238 index, buffer, len, 50); 239 240 kfree(buffer); 241 } 242 243 static void _rtl_usb_io_handler_init(struct device *dev, 244 struct ieee80211_hw *hw) 245 { 246 struct rtl_priv *rtlpriv = rtl_priv(hw); 247 248 rtlpriv->io.dev = dev; 249 mutex_init(&rtlpriv->io.bb_mutex); 250 rtlpriv->io.write8_async = _usb_write8_async; 251 rtlpriv->io.write16_async = _usb_write16_async; 252 rtlpriv->io.write32_async = _usb_write32_async; 253 rtlpriv->io.read8_sync = _usb_read8_sync; 254 rtlpriv->io.read16_sync = _usb_read16_sync; 255 rtlpriv->io.read32_sync = _usb_read32_sync; 256 rtlpriv->io.writeN_sync = _usb_writeN_sync; 257 } 258 259 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) 260 { 261 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw); 262 263 mutex_destroy(&rtlpriv->io.bb_mutex); 264 } 265 266 /** 267 * 268 * Default aggregation handler. Do nothing and just return the oldest skb. 269 */ 270 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw, 271 struct sk_buff_head *list) 272 { 273 return skb_dequeue(list); 274 } 275 276 #define IS_HIGH_SPEED_USB(udev) \ 277 ((USB_SPEED_HIGH == (udev)->speed) ? true : false) 278 279 static int _rtl_usb_init_tx(struct ieee80211_hw *hw) 280 { 281 u32 i; 282 struct rtl_priv *rtlpriv = rtl_priv(hw); 283 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 284 285 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev) 286 ? USB_HIGH_SPEED_BULK_SIZE 287 : USB_FULL_SPEED_BULK_SIZE; 288 289 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n", 290 rtlusb->max_bulk_out_size); 291 292 for (i = 0; i < __RTL_TXQ_NUM; i++) { 293 u32 ep_num = rtlusb->ep_map.ep_mapping[i]; 294 if (!ep_num) { 295 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, 296 "Invalid endpoint map setting!\n"); 297 return -EINVAL; 298 } 299 } 300 301 rtlusb->usb_tx_post_hdl = 302 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl; 303 rtlusb->usb_tx_cleanup = 304 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup; 305 rtlusb->usb_tx_aggregate_hdl = 306 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl) 307 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl 308 : &_none_usb_tx_aggregate_hdl; 309 310 init_usb_anchor(&rtlusb->tx_submitted); 311 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 312 skb_queue_head_init(&rtlusb->tx_skb_queue[i]); 313 init_usb_anchor(&rtlusb->tx_pending[i]); 314 } 315 return 0; 316 } 317 318 static void _rtl_rx_work(unsigned long param); 319 320 static int _rtl_usb_init_rx(struct ieee80211_hw *hw) 321 { 322 struct rtl_priv *rtlpriv = rtl_priv(hw); 323 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 324 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 325 326 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size; 327 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num; 328 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num; 329 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl; 330 rtlusb->usb_rx_segregate_hdl = 331 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl; 332 333 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n", 334 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep); 335 init_usb_anchor(&rtlusb->rx_submitted); 336 init_usb_anchor(&rtlusb->rx_cleanup_urbs); 337 338 skb_queue_head_init(&rtlusb->rx_queue); 339 rtlusb->rx_work_tasklet.func = _rtl_rx_work; 340 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb; 341 342 return 0; 343 } 344 345 static int _rtl_usb_init(struct ieee80211_hw *hw) 346 { 347 struct rtl_priv *rtlpriv = rtl_priv(hw); 348 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 349 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 350 int err; 351 u8 epidx; 352 struct usb_interface *usb_intf = rtlusb->intf; 353 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 354 355 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 356 for (epidx = 0; epidx < epnums; epidx++) { 357 struct usb_endpoint_descriptor *pep_desc; 358 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 359 360 if (usb_endpoint_dir_in(pep_desc)) 361 rtlusb->in_ep_nums++; 362 else if (usb_endpoint_dir_out(pep_desc)) 363 rtlusb->out_ep_nums++; 364 365 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, 366 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 367 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 368 pep_desc->bInterval); 369 } 370 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { 371 pr_err("Too few input end points found\n"); 372 return -EINVAL; 373 } 374 if (rtlusb->out_ep_nums == 0) { 375 pr_err("No output end points found\n"); 376 return -EINVAL; 377 } 378 /* usb endpoint mapping */ 379 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 380 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 381 _rtl_usb_init_tx(hw); 382 _rtl_usb_init_rx(hw); 383 return err; 384 } 385 386 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 387 { 388 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 389 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 390 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 391 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 392 393 rtlhal->hw = hw; 394 ppsc->inactiveps = false; 395 ppsc->leisure_ps = false; 396 ppsc->fwctrl_lps = false; 397 ppsc->reg_fwctrl_lps = 3; 398 ppsc->reg_max_lps_awakeintvl = 5; 399 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 400 401 /* IBSS */ 402 mac->beacon_interval = 100; 403 404 /* AMPDU */ 405 mac->min_space_cfg = 0; 406 mac->max_mss_density = 0; 407 408 /* set sane AMPDU defaults */ 409 mac->current_ampdu_density = 7; 410 mac->current_ampdu_factor = 3; 411 412 /* QOS */ 413 rtlusb->acm_method = EACMWAY2_SW; 414 415 /* IRQ */ 416 /* HIMR - turn all on */ 417 rtlusb->irq_mask[0] = 0xFFFFFFFF; 418 /* HIMR_EX - turn all on */ 419 rtlusb->irq_mask[1] = 0xFFFFFFFF; 420 rtlusb->disableHWSM = true; 421 } 422 423 static void _rtl_rx_completed(struct urb *urb); 424 425 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 426 struct urb *urb, gfp_t gfp_mask) 427 { 428 struct rtl_priv *rtlpriv = rtl_priv(hw); 429 void *buf; 430 431 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 432 &urb->transfer_dma); 433 if (!buf) { 434 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 435 "Failed to usb_alloc_coherent!!\n"); 436 return -ENOMEM; 437 } 438 439 usb_fill_bulk_urb(urb, rtlusb->udev, 440 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 441 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 442 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 443 444 return 0; 445 } 446 447 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 448 struct sk_buff *skb) 449 { 450 struct rtl_priv *rtlpriv = rtl_priv(hw); 451 u8 *rxdesc = skb->data; 452 struct ieee80211_hdr *hdr; 453 bool unicast = false; 454 __le16 fc; 455 struct ieee80211_rx_status rx_status = {0}; 456 struct rtl_stats stats = { 457 .signal = 0, 458 .rate = 0, 459 }; 460 461 skb_pull(skb, RTL_RX_DESC_SIZE); 462 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 463 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 464 hdr = (struct ieee80211_hdr *)(skb->data); 465 fc = hdr->frame_control; 466 if (!stats.crc) { 467 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 468 469 if (is_broadcast_ether_addr(hdr->addr1)) { 470 /*TODO*/; 471 } else if (is_multicast_ether_addr(hdr->addr1)) { 472 /*TODO*/ 473 } else { 474 unicast = true; 475 rtlpriv->stats.rxbytesunicast += skb->len; 476 } 477 478 if (ieee80211_is_data(fc)) { 479 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 480 481 if (unicast) 482 rtlpriv->link_info.num_rx_inperiod++; 483 } 484 /* static bcn for roaming */ 485 rtl_beacon_statistic(hw, skb); 486 } 487 } 488 489 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 490 struct sk_buff *skb) 491 { 492 struct rtl_priv *rtlpriv = rtl_priv(hw); 493 u8 *rxdesc = skb->data; 494 struct ieee80211_hdr *hdr; 495 bool unicast = false; 496 __le16 fc; 497 struct ieee80211_rx_status rx_status = {0}; 498 struct rtl_stats stats = { 499 .signal = 0, 500 .rate = 0, 501 }; 502 503 skb_pull(skb, RTL_RX_DESC_SIZE); 504 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 505 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 506 hdr = (struct ieee80211_hdr *)(skb->data); 507 fc = hdr->frame_control; 508 if (!stats.crc) { 509 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 510 511 if (is_broadcast_ether_addr(hdr->addr1)) { 512 /*TODO*/; 513 } else if (is_multicast_ether_addr(hdr->addr1)) { 514 /*TODO*/ 515 } else { 516 unicast = true; 517 rtlpriv->stats.rxbytesunicast += skb->len; 518 } 519 520 if (ieee80211_is_data(fc)) { 521 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 522 523 if (unicast) 524 rtlpriv->link_info.num_rx_inperiod++; 525 } 526 527 /* static bcn for roaming */ 528 rtl_beacon_statistic(hw, skb); 529 530 if (likely(rtl_action_proc(hw, skb, false))) 531 ieee80211_rx(hw, skb); 532 else 533 dev_kfree_skb_any(skb); 534 } else { 535 dev_kfree_skb_any(skb); 536 } 537 } 538 539 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 540 { 541 struct sk_buff *_skb; 542 struct sk_buff_head rx_queue; 543 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 544 545 skb_queue_head_init(&rx_queue); 546 if (rtlusb->usb_rx_segregate_hdl) 547 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 548 WARN_ON(skb_queue_empty(&rx_queue)); 549 while (!skb_queue_empty(&rx_queue)) { 550 _skb = skb_dequeue(&rx_queue); 551 _rtl_usb_rx_process_agg(hw, _skb); 552 ieee80211_rx(hw, _skb); 553 } 554 } 555 556 #define __RX_SKB_MAX_QUEUED 64 557 558 static void _rtl_rx_work(unsigned long param) 559 { 560 struct rtl_usb *rtlusb = (struct rtl_usb *)param; 561 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 562 struct sk_buff *skb; 563 564 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 565 if (unlikely(IS_USB_STOP(rtlusb))) { 566 dev_kfree_skb_any(skb); 567 continue; 568 } 569 570 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 571 _rtl_usb_rx_process_noagg(hw, skb); 572 } else { 573 /* TO DO */ 574 _rtl_rx_pre_process(hw, skb); 575 pr_err("rx agg not supported\n"); 576 } 577 } 578 } 579 580 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 581 unsigned int len) 582 { 583 #if NET_IP_ALIGN != 0 584 unsigned int padding = 0; 585 #endif 586 587 /* make function no-op when possible */ 588 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 589 return 0; 590 591 #if NET_IP_ALIGN != 0 592 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 593 /* TODO: deduplicate common code, define helper function instead? */ 594 595 if (ieee80211_is_data_qos(hdr->frame_control)) { 596 u8 *qc = ieee80211_get_qos_ctl(hdr); 597 598 padding ^= NET_IP_ALIGN; 599 600 /* Input might be invalid, avoid accessing memory outside 601 * the buffer. 602 */ 603 if ((unsigned long)qc - (unsigned long)hdr < len && 604 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 605 padding ^= NET_IP_ALIGN; 606 } 607 608 if (ieee80211_has_a4(hdr->frame_control)) 609 padding ^= NET_IP_ALIGN; 610 611 return padding; 612 #endif 613 } 614 615 #define __RADIO_TAP_SIZE_RSV 32 616 617 static void _rtl_rx_completed(struct urb *_urb) 618 { 619 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 620 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 621 struct rtl_priv *rtlpriv = rtl_priv(hw); 622 int err = 0; 623 624 if (unlikely(IS_USB_STOP(rtlusb))) 625 goto free; 626 627 if (likely(0 == _urb->status)) { 628 unsigned int padding; 629 struct sk_buff *skb; 630 unsigned int qlen; 631 unsigned int size = _urb->actual_length; 632 struct ieee80211_hdr *hdr; 633 634 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 635 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 636 "Too short packet from bulk IN! (len: %d)\n", 637 size); 638 goto resubmit; 639 } 640 641 qlen = skb_queue_len(&rtlusb->rx_queue); 642 if (qlen >= __RX_SKB_MAX_QUEUED) { 643 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 644 "Pending RX skbuff queue full! (qlen: %d)\n", 645 qlen); 646 goto resubmit; 647 } 648 649 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 650 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 651 652 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 653 if (!skb) { 654 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 655 "Can't allocate skb for bulk IN!\n"); 656 goto resubmit; 657 } 658 659 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 660 661 /* Make sure the payload data is 4 byte aligned. */ 662 skb_reserve(skb, padding); 663 664 /* reserve some space for mac80211's radiotap */ 665 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 666 667 memcpy(skb_put(skb, size), _urb->transfer_buffer, size); 668 669 skb_queue_tail(&rtlusb->rx_queue, skb); 670 tasklet_schedule(&rtlusb->rx_work_tasklet); 671 672 goto resubmit; 673 } 674 675 switch (_urb->status) { 676 /* disconnect */ 677 case -ENOENT: 678 case -ECONNRESET: 679 case -ENODEV: 680 case -ESHUTDOWN: 681 goto free; 682 default: 683 break; 684 } 685 686 resubmit: 687 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 688 err = usb_submit_urb(_urb, GFP_ATOMIC); 689 if (unlikely(err)) { 690 usb_unanchor_urb(_urb); 691 goto free; 692 } 693 return; 694 695 free: 696 /* On some architectures, usb_free_coherent must not be called from 697 * hardirq context. Queue urb to cleanup list. 698 */ 699 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 700 } 701 702 #undef __RADIO_TAP_SIZE_RSV 703 704 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 705 { 706 struct rtl_priv *rtlpriv = rtl_priv(hw); 707 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 708 struct urb *urb; 709 710 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 711 712 tasklet_kill(&rtlusb->rx_work_tasklet); 713 cancel_work_sync(&rtlpriv->works.lps_change_work); 714 715 flush_workqueue(rtlpriv->works.rtl_wq); 716 destroy_workqueue(rtlpriv->works.rtl_wq); 717 718 skb_queue_purge(&rtlusb->rx_queue); 719 720 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 721 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 722 urb->transfer_buffer, urb->transfer_dma); 723 usb_free_urb(urb); 724 } 725 } 726 727 static int _rtl_usb_receive(struct ieee80211_hw *hw) 728 { 729 struct urb *urb; 730 int err; 731 int i; 732 struct rtl_priv *rtlpriv = rtl_priv(hw); 733 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 734 735 WARN_ON(0 == rtlusb->rx_urb_num); 736 /* 1600 == 1514 + max WLAN header + rtk info */ 737 WARN_ON(rtlusb->rx_max_size < 1600); 738 739 for (i = 0; i < rtlusb->rx_urb_num; i++) { 740 err = -ENOMEM; 741 urb = usb_alloc_urb(0, GFP_KERNEL); 742 if (!urb) { 743 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 744 "Failed to alloc URB!!\n"); 745 goto err_out; 746 } 747 748 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 749 if (err < 0) { 750 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 751 "Failed to prep_rx_urb!!\n"); 752 usb_free_urb(urb); 753 goto err_out; 754 } 755 756 usb_anchor_urb(urb, &rtlusb->rx_submitted); 757 err = usb_submit_urb(urb, GFP_KERNEL); 758 if (err) 759 goto err_out; 760 usb_free_urb(urb); 761 } 762 return 0; 763 764 err_out: 765 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 766 _rtl_usb_cleanup_rx(hw); 767 return err; 768 } 769 770 static int rtl_usb_start(struct ieee80211_hw *hw) 771 { 772 int err; 773 struct rtl_priv *rtlpriv = rtl_priv(hw); 774 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 775 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 776 777 err = rtlpriv->cfg->ops->hw_init(hw); 778 if (!err) { 779 rtl_init_rx_config(hw); 780 781 /* Enable software */ 782 SET_USB_START(rtlusb); 783 /* should after adapter start and interrupt enable. */ 784 set_hal_start(rtlhal); 785 786 /* Start bulk IN */ 787 err = _rtl_usb_receive(hw); 788 } 789 790 return err; 791 } 792 /** 793 * 794 * 795 */ 796 797 /*======================= tx =========================================*/ 798 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 799 { 800 u32 i; 801 struct sk_buff *_skb; 802 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 803 struct ieee80211_tx_info *txinfo; 804 805 /* clean up rx stuff. */ 806 _rtl_usb_cleanup_rx(hw); 807 808 /* clean up tx stuff */ 809 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 810 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 811 rtlusb->usb_tx_cleanup(hw, _skb); 812 txinfo = IEEE80211_SKB_CB(_skb); 813 ieee80211_tx_info_clear_status(txinfo); 814 txinfo->flags |= IEEE80211_TX_STAT_ACK; 815 ieee80211_tx_status_irqsafe(hw, _skb); 816 } 817 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 818 } 819 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 820 } 821 822 /** 823 * 824 * We may add some struct into struct rtl_usb later. Do deinit here. 825 * 826 */ 827 static void rtl_usb_deinit(struct ieee80211_hw *hw) 828 { 829 rtl_usb_cleanup(hw); 830 } 831 832 static void rtl_usb_stop(struct ieee80211_hw *hw) 833 { 834 struct rtl_priv *rtlpriv = rtl_priv(hw); 835 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 836 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 837 838 /* should after adapter start and interrupt enable. */ 839 set_hal_stop(rtlhal); 840 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 841 /* Enable software */ 842 SET_USB_STOP(rtlusb); 843 rtlpriv->cfg->ops->hw_disable(hw); 844 } 845 846 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 847 { 848 int err; 849 struct rtl_priv *rtlpriv = rtl_priv(hw); 850 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 851 852 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 853 err = usb_submit_urb(_urb, GFP_ATOMIC); 854 if (err < 0) { 855 struct sk_buff *skb; 856 857 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 858 "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_priv *rtlpriv = rtl_priv(hw); 870 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 871 struct ieee80211_tx_info *txinfo; 872 873 rtlusb->usb_tx_post_hdl(hw, urb, skb); 874 skb_pull(skb, RTL_TX_HEADER_SIZE); 875 txinfo = IEEE80211_SKB_CB(skb); 876 ieee80211_tx_info_clear_status(txinfo); 877 txinfo->flags |= IEEE80211_TX_STAT_ACK; 878 879 if (urb->status) { 880 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 881 "Urb has error status 0x%X\n", urb->status); 882 goto out; 883 } 884 /* TODO: statistics */ 885 out: 886 ieee80211_tx_status_irqsafe(hw, skb); 887 return urb->status; 888 } 889 890 static void _rtl_tx_complete(struct urb *urb) 891 { 892 struct sk_buff *skb = (struct sk_buff *)urb->context; 893 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 894 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 895 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 896 int err; 897 898 if (unlikely(IS_USB_STOP(rtlusb))) 899 return; 900 err = _usb_tx_post(hw, urb, skb); 901 if (err) { 902 /* Ignore error and keep issuiing other urbs */ 903 return; 904 } 905 } 906 907 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 908 struct sk_buff *skb, u32 ep_num) 909 { 910 struct rtl_priv *rtlpriv = rtl_priv(hw); 911 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 912 struct urb *_urb; 913 914 WARN_ON(NULL == skb); 915 _urb = usb_alloc_urb(0, GFP_ATOMIC); 916 if (!_urb) { 917 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 918 "Can't allocate URB for bulk out!\n"); 919 kfree_skb(skb); 920 return NULL; 921 } 922 _rtl_install_trx_info(rtlusb, skb, ep_num); 923 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 924 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 925 _urb->transfer_flags |= URB_ZERO_PACKET; 926 return _urb; 927 } 928 929 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 930 enum rtl_txq qnum) 931 { 932 struct rtl_priv *rtlpriv = rtl_priv(hw); 933 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 934 u32 ep_num; 935 struct urb *_urb = NULL; 936 struct sk_buff *_skb = NULL; 937 938 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 939 if (unlikely(IS_USB_STOP(rtlusb))) { 940 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 941 "USB device is stopping...\n"); 942 kfree_skb(skb); 943 return; 944 } 945 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 946 _skb = skb; 947 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num); 948 if (unlikely(!_urb)) { 949 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, 950 "Can't allocate urb. Drop skb!\n"); 951 kfree_skb(skb); 952 return; 953 } 954 _rtl_submit_tx_urb(hw, _urb); 955 } 956 957 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 958 struct ieee80211_sta *sta, 959 struct sk_buff *skb, 960 u16 hw_queue) 961 { 962 struct rtl_priv *rtlpriv = rtl_priv(hw); 963 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 964 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 965 struct rtl_tx_desc *pdesc = NULL; 966 struct rtl_tcb_desc tcb_desc; 967 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 968 __le16 fc = hdr->frame_control; 969 u8 *pda_addr = hdr->addr1; 970 /* ssn */ 971 u8 *qc = NULL; 972 u8 tid = 0; 973 u16 seq_number = 0; 974 975 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 976 if (ieee80211_is_auth(fc)) { 977 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 978 rtl_ips_nic_on(hw); 979 } 980 981 if (rtlpriv->psc.sw_ps_enabled) { 982 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 983 !ieee80211_has_pm(fc)) 984 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 985 } 986 987 rtl_action_proc(hw, skb, true); 988 if (is_multicast_ether_addr(pda_addr)) 989 rtlpriv->stats.txbytesmulticast += skb->len; 990 else if (is_broadcast_ether_addr(pda_addr)) 991 rtlpriv->stats.txbytesbroadcast += skb->len; 992 else 993 rtlpriv->stats.txbytesunicast += skb->len; 994 if (ieee80211_is_data_qos(fc)) { 995 qc = ieee80211_get_qos_ctl(hdr); 996 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 997 seq_number = (le16_to_cpu(hdr->seq_ctrl) & 998 IEEE80211_SCTL_SEQ) >> 4; 999 seq_number += 1; 1000 seq_number <<= 4; 1001 } 1002 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 1003 hw_queue, &tcb_desc); 1004 if (!ieee80211_has_morefrags(hdr->frame_control)) { 1005 if (qc) 1006 mac->tids[tid].seq_number = seq_number; 1007 } 1008 if (ieee80211_is_data(fc)) 1009 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 1010 } 1011 1012 static int rtl_usb_tx(struct ieee80211_hw *hw, 1013 struct ieee80211_sta *sta, 1014 struct sk_buff *skb, 1015 struct rtl_tcb_desc *dummy) 1016 { 1017 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1018 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 1019 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 1020 __le16 fc = hdr->frame_control; 1021 u16 hw_queue; 1022 1023 if (unlikely(is_hal_stop(rtlhal))) 1024 goto err_free; 1025 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 1026 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 1027 _rtl_usb_transmit(hw, skb, hw_queue); 1028 return NETDEV_TX_OK; 1029 1030 err_free: 1031 dev_kfree_skb_any(skb); 1032 return NETDEV_TX_OK; 1033 } 1034 1035 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 1036 struct ieee80211_sta *sta, 1037 struct sk_buff *skb) 1038 { 1039 return false; 1040 } 1041 1042 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 1043 { 1044 struct rtl_works *rtlworks = 1045 container_of(work, struct rtl_works, fill_h2c_cmd); 1046 struct ieee80211_hw *hw = rtlworks->hw; 1047 struct rtl_priv *rtlpriv = rtl_priv(hw); 1048 1049 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 1050 } 1051 1052 static const struct rtl_intf_ops rtl_usb_ops = { 1053 .adapter_start = rtl_usb_start, 1054 .adapter_stop = rtl_usb_stop, 1055 .adapter_tx = rtl_usb_tx, 1056 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 1057 }; 1058 1059 int rtl_usb_probe(struct usb_interface *intf, 1060 const struct usb_device_id *id, 1061 struct rtl_hal_cfg *rtl_hal_cfg) 1062 { 1063 int err; 1064 struct ieee80211_hw *hw = NULL; 1065 struct rtl_priv *rtlpriv = NULL; 1066 struct usb_device *udev; 1067 struct rtl_usb_priv *usb_priv; 1068 1069 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 1070 sizeof(struct rtl_usb_priv), &rtl_ops); 1071 if (!hw) { 1072 RT_ASSERT(false, "ieee80211 alloc failed\n"); 1073 return -ENOMEM; 1074 } 1075 rtlpriv = hw->priv; 1076 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32), 1077 GFP_KERNEL); 1078 if (!rtlpriv->usb_data) 1079 return -ENOMEM; 1080 1081 /* this spin lock must be initialized early */ 1082 spin_lock_init(&rtlpriv->locks.usb_lock); 1083 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 1084 rtl_fill_h2c_cmd_work_callback); 1085 INIT_WORK(&rtlpriv->works.lps_change_work, 1086 rtl_lps_change_work_callback); 1087 1088 rtlpriv->usb_data_index = 0; 1089 init_completion(&rtlpriv->firmware_loading_complete); 1090 SET_IEEE80211_DEV(hw, &intf->dev); 1091 udev = interface_to_usbdev(intf); 1092 usb_get_dev(udev); 1093 usb_priv = rtl_usbpriv(hw); 1094 memset(usb_priv, 0, sizeof(*usb_priv)); 1095 usb_priv->dev.intf = intf; 1096 usb_priv->dev.udev = udev; 1097 usb_set_intfdata(intf, hw); 1098 /* init cfg & intf_ops */ 1099 rtlpriv->rtlhal.interface = INTF_USB; 1100 rtlpriv->cfg = rtl_hal_cfg; 1101 rtlpriv->intf_ops = &rtl_usb_ops; 1102 rtl_dbgp_flag_init(hw); 1103 /* Init IO handler */ 1104 _rtl_usb_io_handler_init(&udev->dev, hw); 1105 rtlpriv->cfg->ops->read_chip_version(hw); 1106 /*like read eeprom and so on */ 1107 rtlpriv->cfg->ops->read_eeprom_info(hw); 1108 err = _rtl_usb_init(hw); 1109 if (err) 1110 goto error_out; 1111 rtl_usb_init_sw(hw); 1112 /* Init mac80211 sw */ 1113 err = rtl_init_core(hw); 1114 if (err) { 1115 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, 1116 "Can't allocate sw for mac80211\n"); 1117 goto error_out; 1118 } 1119 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1120 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n"); 1121 goto error_out; 1122 } 1123 rtlpriv->cfg->ops->init_sw_leds(hw); 1124 1125 err = ieee80211_register_hw(hw); 1126 if (err) { 1127 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, 1128 "Can't register mac80211 hw.\n"); 1129 err = -ENODEV; 1130 goto error_out; 1131 } 1132 rtlpriv->mac80211.mac80211_registered = 1; 1133 1134 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1135 return 0; 1136 1137 error_out: 1138 rtl_deinit_core(hw); 1139 _rtl_usb_io_handler_release(hw); 1140 usb_put_dev(udev); 1141 complete(&rtlpriv->firmware_loading_complete); 1142 return -ENODEV; 1143 } 1144 EXPORT_SYMBOL(rtl_usb_probe); 1145 1146 void rtl_usb_disconnect(struct usb_interface *intf) 1147 { 1148 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1149 struct rtl_priv *rtlpriv = rtl_priv(hw); 1150 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1151 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1152 1153 if (unlikely(!rtlpriv)) 1154 return; 1155 /* just in case driver is removed before firmware callback */ 1156 wait_for_completion(&rtlpriv->firmware_loading_complete); 1157 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1158 /*ieee80211_unregister_hw will call ops_stop */ 1159 if (rtlmac->mac80211_registered == 1) { 1160 ieee80211_unregister_hw(hw); 1161 rtlmac->mac80211_registered = 0; 1162 } else { 1163 rtl_deinit_deferred_work(hw); 1164 rtlpriv->intf_ops->adapter_stop(hw); 1165 } 1166 /*deinit rfkill */ 1167 /* rtl_deinit_rfkill(hw); */ 1168 rtl_usb_deinit(hw); 1169 rtl_deinit_core(hw); 1170 kfree(rtlpriv->usb_data); 1171 rtlpriv->cfg->ops->deinit_sw_leds(hw); 1172 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1173 _rtl_usb_io_handler_release(hw); 1174 usb_put_dev(rtlusb->udev); 1175 usb_set_intfdata(intf, NULL); 1176 ieee80211_free_hw(hw); 1177 } 1178 EXPORT_SYMBOL(rtl_usb_disconnect); 1179 1180 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1181 { 1182 return 0; 1183 } 1184 EXPORT_SYMBOL(rtl_usb_suspend); 1185 1186 int rtl_usb_resume(struct usb_interface *pusb_intf) 1187 { 1188 return 0; 1189 } 1190 EXPORT_SYMBOL(rtl_usb_resume); 1191