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 #include <linux/module.h>
  36
  37 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
  38 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
  39 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
  40 MODULE_LICENSE("GPL");
  41 MODULE_DESCRIPTION("USB basic driver for rtlwifi");
  42
  43 #define REALTEK_USB_VENQT_READ                  0xC0
  44 #define REALTEK_USB_VENQT_WRITE                 0x40
  45 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  46 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  47
  48 #define MAX_USBCTRL_VENDORREQ_TIMES             10
  49
  50 static void usbctrl_async_callback(struct urb *urb)
  51 {
  52         if (urb) {
  53                 /* free dr */
  54                 kfree(urb->setup_packet);
  55                 /* free databuf */
  56                 kfree(urb->transfer_buffer);
  57         }
  58 }
  59
  60 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  61                                           u16 value, u16 index, void *pdata,
  62                                           u16 len)
  63 {
  64         int rc;
  65         unsigned int pipe;
  66         u8 reqtype;
  67         struct usb_ctrlrequest *dr;
  68         struct urb *urb;
  69         const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
  70         u8 *databuf;
  71
  72         if (WARN_ON_ONCE(len > databuf_maxlen))
  73                 len = databuf_maxlen;
  74
  75         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  76         reqtype =  REALTEK_USB_VENQT_WRITE;
  77
  78         dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
  79         if (!dr)
  80                 return -ENOMEM;
  81
  82         databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
  83         if (!databuf) {
  84                 kfree(dr);
  85                 return -ENOMEM;
  86         }
  87
  88         urb = usb_alloc_urb(0, GFP_ATOMIC);
  89         if (!urb) {
  90                 kfree(databuf);
  91                 kfree(dr);
  92                 return -ENOMEM;
  93         }
  94
  95         dr->bRequestType = reqtype;
  96         dr->bRequest = request;
  97         dr->wValue = cpu_to_le16(value);
  98         dr->wIndex = cpu_to_le16(index);
  99         dr->wLength = cpu_to_le16(len);
 100         /* data are already in little-endian order */
 101         memcpy(databuf, pdata, len);
 102         usb_fill_control_urb(urb, udev, pipe,
 103                              (unsigned char *)dr, databuf, len,
 104                              usbctrl_async_callback, NULL);
 105         rc = usb_submit_urb(urb, GFP_ATOMIC);
 106         if (rc < 0) {
 107                 kfree(databuf);
 108                 kfree(dr);
 109         }
 110         usb_free_urb(urb);
 111         return rc;
 112 }
 113
 114 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
 115                                         u16 value, u16 index, void *pdata,
 116                                         u16 len)
 117 {
 118         unsigned int pipe;
 119         int status;
 120         u8 reqtype;
 121         int vendorreq_times = 0;
 122         static int count;
 123
 124         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 125         reqtype =  REALTEK_USB_VENQT_READ;
 126
 127         do {
 128                 status = usb_control_msg(udev, pipe, request, reqtype, value,
 129                                          index, pdata, len, 0); /*max. timeout*/
 130                 if (status < 0) {
 131                         /* firmware download is checksumed, don't retry */
 132                         if ((value >= FW_8192C_START_ADDRESS &&
 133                             value <= FW_8192C_END_ADDRESS))
 134                                 break;
 135                 } else {
 136                         break;
 137                 }
 138         } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
 139
 140         if (status < 0 && count++ < 4)
 141                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 142                        value, status, *(u32 *)pdata);
 143         return status;
 144 }
 145
 146 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 147 {
 148         struct device *dev = rtlpriv->io.dev;
 149         struct usb_device *udev = to_usb_device(dev);
 150         u8 request;
 151         u16 wvalue;
 152         u16 index;
 153         __le32 *data;
 154         unsigned long flags;
 155
 156         spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
 157         if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 158                 rtlpriv->usb_data_index = 0;
 159         data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 160         spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 161         request = REALTEK_USB_VENQT_CMD_REQ;
 162         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 163
 164         wvalue = (u16)addr;
 165         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 166         return le32_to_cpu(*data);
 167 }
 168
 169 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 170 {
 171         return (u8)_usb_read_sync(rtlpriv, addr, 1);
 172 }
 173
 174 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 175 {
 176         return (u16)_usb_read_sync(rtlpriv, addr, 2);
 177 }
 178
 179 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 180 {
 181         return _usb_read_sync(rtlpriv, addr, 4);
 182 }
 183
 184 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 185                              u16 len)
 186 {
 187         u8 request;
 188         u16 wvalue;
 189         u16 index;
 190         __le32 data;
 191
 192         request = REALTEK_USB_VENQT_CMD_REQ;
 193         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 194         wvalue = (u16)(addr&0x0000ffff);
 195         data = cpu_to_le32(val);
 196         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 197                                        len);
 198 }
 199
 200 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 201 {
 202         struct device *dev = rtlpriv->io.dev;
 203
 204         _usb_write_async(to_usb_device(dev), addr, val, 1);
 205 }
 206
 207 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 208 {
 209         struct device *dev = rtlpriv->io.dev;
 210
 211         _usb_write_async(to_usb_device(dev), addr, val, 2);
 212 }
 213
 214 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 215 {
 216         struct device *dev = rtlpriv->io.dev;
 217
 218         _usb_write_async(to_usb_device(dev), addr, val, 4);
 219 }
 220
 221 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
 222                              u16 len)
 223 {
 224         struct device *dev = rtlpriv->io.dev;
 225         struct usb_device *udev = to_usb_device(dev);
 226         u8 request = REALTEK_USB_VENQT_CMD_REQ;
 227         u8 reqtype =  REALTEK_USB_VENQT_WRITE;
 228         u16 wvalue;
 229         u16 index = REALTEK_USB_VENQT_CMD_IDX;
 230         int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 231         u8 *buffer;
 232
 233         wvalue = (u16)(addr & 0x0000ffff);
 234         buffer = kmemdup(data, len, GFP_ATOMIC);
 235         if (!buffer)
 236                 return;
 237         usb_control_msg(udev, pipe, request, reqtype, wvalue,
 238                         index, buffer, len, 50);
 239
 240         kfree(buffer);
 241 }
 242
 243 static void _rtl_usb_io_handler_init(struct device *dev,
 244                                      struct ieee80211_hw *hw)
 245 {
 246         struct rtl_priv *rtlpriv = rtl_priv(hw);
 247
 248         rtlpriv->io.dev = dev;
 249         mutex_init(&rtlpriv->io.bb_mutex);
 250         rtlpriv->io.write8_async        = _usb_write8_async;
 251         rtlpriv->io.write16_async       = _usb_write16_async;
 252         rtlpriv->io.write32_async       = _usb_write32_async;
 253         rtlpriv->io.read8_sync          = _usb_read8_sync;
 254         rtlpriv->io.read16_sync         = _usb_read16_sync;
 255         rtlpriv->io.read32_sync         = _usb_read32_sync;
 256         rtlpriv->io.writeN_sync         = _usb_writeN_sync;
 257 }
 258
 259 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 260 {
 261         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 262
 263         mutex_destroy(&rtlpriv->io.bb_mutex);
 264 }
 265
 266 /**
 267  *
 268  *      Default aggregation handler. Do nothing and just return the oldest skb.
 269  */
 270 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 271                                                   struct sk_buff_head *list)
 272 {
 273         return skb_dequeue(list);
 274 }
 275
 276 #define IS_HIGH_SPEED_USB(udev) \
 277                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 278
 279 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 280 {
 281         u32 i;
 282         struct rtl_priv *rtlpriv = rtl_priv(hw);
 283         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 284
 285         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 286                                                     ? USB_HIGH_SPEED_BULK_SIZE
 287                                                     : USB_FULL_SPEED_BULK_SIZE;
 288
 289         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
 290                  rtlusb->max_bulk_out_size);
 291
 292         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 293                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 294                 if (!ep_num) {
 295                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 296                                  "Invalid endpoint map setting!\n");
 297                         return -EINVAL;
 298                 }
 299         }
 300
 301         rtlusb->usb_tx_post_hdl =
 302                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 303         rtlusb->usb_tx_cleanup  =
 304                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 305         rtlusb->usb_tx_aggregate_hdl =
 306                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 307                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 308                  : &_none_usb_tx_aggregate_hdl;
 309
 310         init_usb_anchor(&rtlusb->tx_submitted);
 311         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 312                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 313                 init_usb_anchor(&rtlusb->tx_pending[i]);
 314         }
 315         return 0;
 316 }
 317
 318 static void _rtl_rx_work(unsigned long param);
 319
 320 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 321 {
 322         struct rtl_priv *rtlpriv = rtl_priv(hw);
 323         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 324         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 325
 326         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 327         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 328         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 329         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 330         rtlusb->usb_rx_segregate_hdl =
 331                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 332
 333         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 334                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 335         init_usb_anchor(&rtlusb->rx_submitted);
 336         init_usb_anchor(&rtlusb->rx_cleanup_urbs);
 337
 338         skb_queue_head_init(&rtlusb->rx_queue);
 339         rtlusb->rx_work_tasklet.func = _rtl_rx_work;
 340         rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
 341
 342         return 0;
 343 }
 344
 345 static int _rtl_usb_init(struct ieee80211_hw *hw)
 346 {
 347         struct rtl_priv *rtlpriv = rtl_priv(hw);
 348         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 349         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 350         int err;
 351         u8 epidx;
 352         struct usb_interface    *usb_intf = rtlusb->intf;
 353         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 354
 355         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 356         for (epidx = 0; epidx < epnums; epidx++) {
 357                 struct usb_endpoint_descriptor *pep_desc;
 358                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 359
 360                 if (usb_endpoint_dir_in(pep_desc))
 361                         rtlusb->in_ep_nums++;
 362                 else if (usb_endpoint_dir_out(pep_desc))
 363                         rtlusb->out_ep_nums++;
 364
 365                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 366                          "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 367                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 368                          pep_desc->bInterval);
 369         }
 370         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 371                 pr_err("Too few input end points found\n");
 372                 return -EINVAL;
 373         }
 374         if (rtlusb->out_ep_nums == 0) {
 375                 pr_err("No output end points found\n");
 376                 return -EINVAL;
 377         }
 378         /* usb endpoint mapping */
 379         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 380         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 381         _rtl_usb_init_tx(hw);
 382         _rtl_usb_init_rx(hw);
 383         return err;
 384 }
 385
 386 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 387 {
 388         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 389         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 390         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 391         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 392
 393         rtlhal->hw = hw;
 394         ppsc->inactiveps = false;
 395         ppsc->leisure_ps = false;
 396         ppsc->fwctrl_lps = false;
 397         ppsc->reg_fwctrl_lps = 3;
 398         ppsc->reg_max_lps_awakeintvl = 5;
 399         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 400
 401          /* IBSS */
 402         mac->beacon_interval = 100;
 403
 404          /* AMPDU */
 405         mac->min_space_cfg = 0;
 406         mac->max_mss_density = 0;
 407
 408         /* set sane AMPDU defaults */
 409         mac->current_ampdu_density = 7;
 410         mac->current_ampdu_factor = 3;
 411
 412         /* QOS */
 413         rtlusb->acm_method = eAcmWay2_SW;
 414
 415         /* IRQ */
 416         /* HIMR - turn all on */
 417         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 418         /* HIMR_EX - turn all on */
 419         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 420         rtlusb->disableHWSM =  true;
 421 }
 422
 423 static void _rtl_rx_completed(struct urb *urb);
 424
 425 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
 426                               struct urb *urb, gfp_t gfp_mask)
 427 {
 428         struct rtl_priv *rtlpriv = rtl_priv(hw);
 429         void *buf;
 430
 431         buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
 432                                  &urb->transfer_dma);
 433         if (!buf) {
 434                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 435                          "Failed to usb_alloc_coherent!!\n");
 436                 return -ENOMEM;
 437         }
 438
 439         usb_fill_bulk_urb(urb, rtlusb->udev,
 440                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 441                           buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
 442         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 443
 444         return 0;
 445 }
 446
 447 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 448                                     struct sk_buff *skb)
 449 {
 450         struct rtl_priv *rtlpriv = rtl_priv(hw);
 451         u8 *rxdesc = skb->data;
 452         struct ieee80211_hdr *hdr;
 453         bool unicast = false;
 454         __le16 fc;
 455         struct ieee80211_rx_status rx_status = {0};
 456         struct rtl_stats stats = {
 457                 .signal = 0,
 458                 .noise = -98,
 459                 .rate = 0,
 460         };
 461
 462         skb_pull(skb, RTL_RX_DESC_SIZE);
 463         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 464         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 465         hdr = (struct ieee80211_hdr *)(skb->data);
 466         fc = hdr->frame_control;
 467         if (!stats.crc) {
 468                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 469
 470                 if (is_broadcast_ether_addr(hdr->addr1)) {
 471                         /*TODO*/;
 472                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 473                         /*TODO*/
 474                 } else {
 475                         unicast = true;
 476                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 477                 }
 478
 479                 rtl_is_special_data(hw, skb, false);
 480
 481                 if (ieee80211_is_data(fc)) {
 482                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 483
 484                         if (unicast)
 485                                 rtlpriv->link_info.num_rx_inperiod++;
 486                 }
 487         }
 488 }
 489
 490 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 491                                       struct sk_buff *skb)
 492 {
 493         struct rtl_priv *rtlpriv = rtl_priv(hw);
 494         u8 *rxdesc = skb->data;
 495         struct ieee80211_hdr *hdr;
 496         bool unicast = false;
 497         __le16 fc;
 498         struct ieee80211_rx_status rx_status = {0};
 499         struct rtl_stats stats = {
 500                 .signal = 0,
 501                 .noise = -98,
 502                 .rate = 0,
 503         };
 504
 505         skb_pull(skb, RTL_RX_DESC_SIZE);
 506         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 507         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 508         hdr = (struct ieee80211_hdr *)(skb->data);
 509         fc = hdr->frame_control;
 510         if (!stats.crc) {
 511                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 512
 513                 if (is_broadcast_ether_addr(hdr->addr1)) {
 514                         /*TODO*/;
 515                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 516                         /*TODO*/
 517                 } else {
 518                         unicast = true;
 519                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 520                 }
 521
 522                 rtl_is_special_data(hw, skb, false);
 523
 524                 if (ieee80211_is_data(fc)) {
 525                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 526
 527                         if (unicast)
 528                                 rtlpriv->link_info.num_rx_inperiod++;
 529                 }
 530
 531                 /* static bcn for roaming */
 532                 rtl_beacon_statistic(hw, skb);
 533
 534                 if (likely(rtl_action_proc(hw, skb, false)))
 535                         ieee80211_rx(hw, skb);
 536                 else
 537                         dev_kfree_skb_any(skb);
 538         }
 539 }
 540
 541 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 542 {
 543         struct sk_buff *_skb;
 544         struct sk_buff_head rx_queue;
 545         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 546
 547         skb_queue_head_init(&rx_queue);
 548         if (rtlusb->usb_rx_segregate_hdl)
 549                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 550         WARN_ON(skb_queue_empty(&rx_queue));
 551         while (!skb_queue_empty(&rx_queue)) {
 552                 _skb = skb_dequeue(&rx_queue);
 553                 _rtl_usb_rx_process_agg(hw, _skb);
 554                 ieee80211_rx(hw, _skb);
 555         }
 556 }
 557
 558 #define __RX_SKB_MAX_QUEUED     32
 559
 560 static void _rtl_rx_work(unsigned long param)
 561 {
 562         struct rtl_usb *rtlusb = (struct rtl_usb *)param;
 563         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 564         struct sk_buff *skb;
 565
 566         while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
 567                 if (unlikely(IS_USB_STOP(rtlusb))) {
 568                         dev_kfree_skb_any(skb);
 569                         continue;
 570                 }
 571
 572                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 573                         _rtl_usb_rx_process_noagg(hw, skb);
 574                 } else {
 575                         /* TO DO */
 576                         _rtl_rx_pre_process(hw, skb);
 577                         pr_err("rx agg not supported\n");
 578                 }
 579         }
 580 }
 581
 582 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
 583                                         unsigned int len)
 584 {
 585         unsigned int padding = 0;
 586
 587         /* make function no-op when possible */
 588         if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
 589                 return 0;
 590
 591         /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
 592         /* TODO: deduplicate common code, define helper function instead? */
 593
 594         if (ieee80211_is_data_qos(hdr->frame_control)) {
 595                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 596
 597                 padding ^= NET_IP_ALIGN;
 598
 599                 /* Input might be invalid, avoid accessing memory outside
 600                  * the buffer.
 601                  */
 602                 if ((unsigned long)qc - (unsigned long)hdr < len &&
 603                     *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 604                         padding ^= NET_IP_ALIGN;
 605         }
 606
 607         if (ieee80211_has_a4(hdr->frame_control))
 608                 padding ^= NET_IP_ALIGN;
 609
 610         return padding;
 611 }
 612
 613 #define __RADIO_TAP_SIZE_RSV    32
 614
 615 static void _rtl_rx_completed(struct urb *_urb)
 616 {
 617         struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
 618         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 619         struct rtl_priv *rtlpriv = rtl_priv(hw);
 620         int err = 0;
 621
 622         if (unlikely(IS_USB_STOP(rtlusb)))
 623                 goto free;
 624
 625         if (likely(0 == _urb->status)) {
 626                 unsigned int padding;
 627                 struct sk_buff *skb;
 628                 unsigned int qlen;
 629                 unsigned int size = _urb->actual_length;
 630                 struct ieee80211_hdr *hdr;
 631
 632                 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
 633                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 634                                  "Too short packet from bulk IN! (len: %d)\n",
 635                                  size);
 636                         goto resubmit;
 637                 }
 638
 639                 qlen = skb_queue_len(&rtlusb->rx_queue);
 640                 if (qlen >= __RX_SKB_MAX_QUEUED) {
 641                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 642                                  "Pending RX skbuff queue full! (qlen: %d)\n",
 643                                  qlen);
 644                         goto resubmit;
 645                 }
 646
 647                 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
 648                 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
 649
 650                 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
 651                 if (!skb) {
 652                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 653                                  "Can't allocate skb for bulk IN!\n");
 654                         goto resubmit;
 655                 }
 656
 657                 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 658
 659                 /* Make sure the payload data is 4 byte aligned. */
 660                 skb_reserve(skb, padding);
 661
 662                 /* reserve some space for mac80211's radiotap */
 663                 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 664
 665                 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
 666
 667                 skb_queue_tail(&rtlusb->rx_queue, skb);
 668                 tasklet_schedule(&rtlusb->rx_work_tasklet);
 669
 670                 goto resubmit;
 671         }
 672
 673         switch (_urb->status) {
 674         /* disconnect */
 675         case -ENOENT:
 676         case -ECONNRESET:
 677         case -ENODEV:
 678         case -ESHUTDOWN:
 679                 goto free;
 680         default:
 681                 break;
 682         }
 683
 684 resubmit:
 685         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 686         err = usb_submit_urb(_urb, GFP_ATOMIC);
 687         if (unlikely(err)) {
 688                 usb_unanchor_urb(_urb);
 689                 goto free;
 690         }
 691         return;
 692
 693 free:
 694         /* On some architectures, usb_free_coherent must not be called from
 695          * hardirq context. Queue urb to cleanup list.
 696          */
 697         usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
 698 }
 699
 700 #undef __RADIO_TAP_SIZE_RSV
 701
 702 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
 703 {
 704         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 705         struct urb *urb;
 706
 707         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 708
 709         tasklet_kill(&rtlusb->rx_work_tasklet);
 710         skb_queue_purge(&rtlusb->rx_queue);
 711
 712         while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
 713                 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 714                                 urb->transfer_buffer, urb->transfer_dma);
 715                 usb_free_urb(urb);
 716         }
 717 }
 718
 719 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 720 {
 721         struct urb *urb;
 722         int err;
 723         int i;
 724         struct rtl_priv *rtlpriv = rtl_priv(hw);
 725         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 726
 727         WARN_ON(0 == rtlusb->rx_urb_num);
 728         /* 1600 == 1514 + max WLAN header + rtk info */
 729         WARN_ON(rtlusb->rx_max_size < 1600);
 730
 731         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 732                 err = -ENOMEM;
 733                 urb = usb_alloc_urb(0, GFP_KERNEL);
 734                 if (!urb) {
 735                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 736                                  "Failed to alloc URB!!\n");
 737                         goto err_out;
 738                 }
 739
 740                 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 741                 if (err < 0) {
 742                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 743                                  "Failed to prep_rx_urb!!\n");
 744                         usb_free_urb(urb);
 745                         goto err_out;
 746                 }
 747
 748                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 749                 err = usb_submit_urb(urb, GFP_KERNEL);
 750                 if (err)
 751                         goto err_out;
 752                 usb_free_urb(urb);
 753         }
 754         return 0;
 755
 756 err_out:
 757         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 758         _rtl_usb_cleanup_rx(hw);
 759         return err;
 760 }
 761
 762 static int rtl_usb_start(struct ieee80211_hw *hw)
 763 {
 764         int err;
 765         struct rtl_priv *rtlpriv = rtl_priv(hw);
 766         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 767         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 768
 769         err = rtlpriv->cfg->ops->hw_init(hw);
 770         if (!err) {
 771                 rtl_init_rx_config(hw);
 772
 773                 /* Enable software */
 774                 SET_USB_START(rtlusb);
 775                 /* should after adapter start and interrupt enable. */
 776                 set_hal_start(rtlhal);
 777
 778                 /* Start bulk IN */
 779                 err = _rtl_usb_receive(hw);
 780         }
 781
 782         return err;
 783 }
 784 /**
 785  *
 786  *
 787  */
 788
 789 /*=======================  tx =========================================*/
 790 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 791 {
 792         u32 i;
 793         struct sk_buff *_skb;
 794         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 795         struct ieee80211_tx_info *txinfo;
 796
 797         SET_USB_STOP(rtlusb);
 798
 799         /* clean up rx stuff. */
 800         _rtl_usb_cleanup_rx(hw);
 801
 802         /* clean up tx stuff */
 803         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 804                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 805                         rtlusb->usb_tx_cleanup(hw, _skb);
 806                         txinfo = IEEE80211_SKB_CB(_skb);
 807                         ieee80211_tx_info_clear_status(txinfo);
 808                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 809                         ieee80211_tx_status_irqsafe(hw, _skb);
 810                 }
 811                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 812         }
 813         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 814 }
 815
 816 /**
 817  *
 818  * We may add some struct into struct rtl_usb later. Do deinit here.
 819  *
 820  */
 821 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 822 {
 823         rtl_usb_cleanup(hw);
 824 }
 825
 826 static void rtl_usb_stop(struct ieee80211_hw *hw)
 827 {
 828         struct rtl_priv *rtlpriv = rtl_priv(hw);
 829         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 830         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 831
 832         /* should after adapter start and interrupt enable. */
 833         set_hal_stop(rtlhal);
 834         cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
 835         /* Enable software */
 836         SET_USB_STOP(rtlusb);
 837         rtl_usb_deinit(hw);
 838         rtlpriv->cfg->ops->hw_disable(hw);
 839 }
 840
 841 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 842 {
 843         int err;
 844         struct rtl_priv *rtlpriv = rtl_priv(hw);
 845         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 846
 847         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 848         err = usb_submit_urb(_urb, GFP_ATOMIC);
 849         if (err < 0) {
 850                 struct sk_buff *skb;
 851
 852                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 853                          "Failed to submit urb\n");
 854                 usb_unanchor_urb(_urb);
 855                 skb = (struct sk_buff *)_urb->context;
 856                 kfree_skb(skb);
 857         }
 858         usb_free_urb(_urb);
 859 }
 860
 861 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 862                         struct sk_buff *skb)
 863 {
 864         struct rtl_priv *rtlpriv = rtl_priv(hw);
 865         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 866         struct ieee80211_tx_info *txinfo;
 867
 868         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 869         skb_pull(skb, RTL_TX_HEADER_SIZE);
 870         txinfo = IEEE80211_SKB_CB(skb);
 871         ieee80211_tx_info_clear_status(txinfo);
 872         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 873
 874         if (urb->status) {
 875                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 876                          "Urb has error status 0x%X\n", urb->status);
 877                 goto out;
 878         }
 879         /*  TODO:       statistics */
 880 out:
 881         ieee80211_tx_status_irqsafe(hw, skb);
 882         return urb->status;
 883 }
 884
 885 static void _rtl_tx_complete(struct urb *urb)
 886 {
 887         struct sk_buff *skb = (struct sk_buff *)urb->context;
 888         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 889         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 890         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 891         int err;
 892
 893         if (unlikely(IS_USB_STOP(rtlusb)))
 894                 return;
 895         err = _usb_tx_post(hw, urb, skb);
 896         if (err) {
 897                 /* Ignore error and keep issuiing other urbs */
 898                 return;
 899         }
 900 }
 901
 902 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 903                                 struct sk_buff *skb, u32 ep_num)
 904 {
 905         struct rtl_priv *rtlpriv = rtl_priv(hw);
 906         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 907         struct urb *_urb;
 908
 909         WARN_ON(NULL == skb);
 910         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 911         if (!_urb) {
 912                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 913                          "Can't allocate URB for bulk out!\n");
 914                 kfree_skb(skb);
 915                 return NULL;
 916         }
 917         _rtl_install_trx_info(rtlusb, skb, ep_num);
 918         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 919                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 920         _urb->transfer_flags |= URB_ZERO_PACKET;
 921         return _urb;
 922 }
 923
 924 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 925                        enum rtl_txq qnum)
 926 {
 927         struct rtl_priv *rtlpriv = rtl_priv(hw);
 928         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 929         u32 ep_num;
 930         struct urb *_urb = NULL;
 931         struct sk_buff *_skb = NULL;
 932
 933         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 934         if (unlikely(IS_USB_STOP(rtlusb))) {
 935                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 936                          "USB device is stopping...\n");
 937                 kfree_skb(skb);
 938                 return;
 939         }
 940         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 941         _skb = skb;
 942         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 943         if (unlikely(!_urb)) {
 944                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 945                          "Can't allocate urb. Drop skb!\n");
 946                 kfree_skb(skb);
 947                 return;
 948         }
 949         _rtl_submit_tx_urb(hw, _urb);
 950 }
 951
 952 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 953                                    struct ieee80211_sta *sta,
 954                                    struct sk_buff *skb,
 955                                    u16 hw_queue)
 956 {
 957         struct rtl_priv *rtlpriv = rtl_priv(hw);
 958         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 959         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 960         struct rtl_tx_desc *pdesc = NULL;
 961         struct rtl_tcb_desc tcb_desc;
 962         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 963         __le16 fc = hdr->frame_control;
 964         u8 *pda_addr = hdr->addr1;
 965         /* ssn */
 966         u8 *qc = NULL;
 967         u8 tid = 0;
 968         u16 seq_number = 0;
 969
 970         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 971         if (ieee80211_is_auth(fc)) {
 972                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 973                 rtl_ips_nic_on(hw);
 974         }
 975
 976         if (rtlpriv->psc.sw_ps_enabled) {
 977                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 978                     !ieee80211_has_pm(fc))
 979                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 980         }
 981
 982         rtl_action_proc(hw, skb, true);
 983         if (is_multicast_ether_addr(pda_addr))
 984                 rtlpriv->stats.txbytesmulticast += skb->len;
 985         else if (is_broadcast_ether_addr(pda_addr))
 986                 rtlpriv->stats.txbytesbroadcast += skb->len;
 987         else
 988                 rtlpriv->stats.txbytesunicast += skb->len;
 989         if (ieee80211_is_data_qos(fc)) {
 990                 qc = ieee80211_get_qos_ctl(hdr);
 991                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 992                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 993                              IEEE80211_SCTL_SEQ) >> 4;
 994                 seq_number += 1;
 995                 seq_number <<= 4;
 996         }
 997         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
 998                                         hw_queue, &tcb_desc);
 999         if (!ieee80211_has_morefrags(hdr->frame_control)) {
1000                 if (qc)
1001                         mac->tids[tid].seq_number = seq_number;
1002         }
1003         if (ieee80211_is_data(fc))
1004                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1005 }
1006
1007 static int rtl_usb_tx(struct ieee80211_hw *hw,
1008                       struct ieee80211_sta *sta,
1009                       struct sk_buff *skb,
1010                       struct rtl_tcb_desc *dummy)
1011 {
1012         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1013         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1014         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1015         __le16 fc = hdr->frame_control;
1016         u16 hw_queue;
1017
1018         if (unlikely(is_hal_stop(rtlhal)))
1019                 goto err_free;
1020         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1021         _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1022         _rtl_usb_transmit(hw, skb, hw_queue);
1023         return NETDEV_TX_OK;
1024
1025 err_free:
1026         dev_kfree_skb_any(skb);
1027         return NETDEV_TX_OK;
1028 }
1029
1030 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1031                                         struct ieee80211_sta *sta,
1032                                         struct sk_buff *skb)
1033 {
1034         return false;
1035 }
1036
1037 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1038 {
1039         struct rtl_works *rtlworks =
1040             container_of(work, struct rtl_works, fill_h2c_cmd);
1041         struct ieee80211_hw *hw = rtlworks->hw;
1042         struct rtl_priv *rtlpriv = rtl_priv(hw);
1043
1044         rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1045 }
1046
1047 static struct rtl_intf_ops rtl_usb_ops = {
1048         .adapter_start = rtl_usb_start,
1049         .adapter_stop = rtl_usb_stop,
1050         .adapter_tx = rtl_usb_tx,
1051         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1052 };
1053
1054 int rtl_usb_probe(struct usb_interface *intf,
1055                   const struct usb_device_id *id,
1056                   struct rtl_hal_cfg *rtl_hal_cfg)
1057 {
1058         int err;
1059         struct ieee80211_hw *hw = NULL;
1060         struct rtl_priv *rtlpriv = NULL;
1061         struct usb_device       *udev;
1062         struct rtl_usb_priv *usb_priv;
1063
1064         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1065                                 sizeof(struct rtl_usb_priv), &rtl_ops);
1066         if (!hw) {
1067                 RT_ASSERT(false, "ieee80211 alloc failed\n");
1068                 return -ENOMEM;
1069         }
1070         rtlpriv = hw->priv;
1071         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1072                                     GFP_KERNEL);
1073         if (!rtlpriv->usb_data)
1074                 return -ENOMEM;
1075
1076         /* this spin lock must be initialized early */
1077         spin_lock_init(&rtlpriv->locks.usb_lock);
1078         INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1079                   rtl_fill_h2c_cmd_work_callback);
1080         INIT_WORK(&rtlpriv->works.lps_change_work,
1081                   rtl_lps_change_work_callback);
1082
1083         rtlpriv->usb_data_index = 0;
1084         init_completion(&rtlpriv->firmware_loading_complete);
1085         SET_IEEE80211_DEV(hw, &intf->dev);
1086         udev = interface_to_usbdev(intf);
1087         usb_get_dev(udev);
1088         usb_priv = rtl_usbpriv(hw);
1089         memset(usb_priv, 0, sizeof(*usb_priv));
1090         usb_priv->dev.intf = intf;
1091         usb_priv->dev.udev = udev;
1092         usb_set_intfdata(intf, hw);
1093         /* init cfg & intf_ops */
1094         rtlpriv->rtlhal.interface = INTF_USB;
1095         rtlpriv->cfg = rtl_hal_cfg;
1096         rtlpriv->intf_ops = &rtl_usb_ops;
1097         rtl_dbgp_flag_init(hw);
1098         /* Init IO handler */
1099         _rtl_usb_io_handler_init(&udev->dev, hw);
1100         rtlpriv->cfg->ops->read_chip_version(hw);
1101         /*like read eeprom and so on */
1102         rtlpriv->cfg->ops->read_eeprom_info(hw);
1103         err = _rtl_usb_init(hw);
1104         if (err)
1105                 goto error_out;
1106         rtl_usb_init_sw(hw);
1107         /* Init mac80211 sw */
1108         err = rtl_init_core(hw);
1109         if (err) {
1110                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1111                          "Can't allocate sw for mac80211\n");
1112                 goto error_out;
1113         }
1114         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1115                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1116                 goto error_out;
1117         }
1118         rtlpriv->cfg->ops->init_sw_leds(hw);
1119
1120         return 0;
1121 error_out:
1122         rtl_deinit_core(hw);
1123         _rtl_usb_io_handler_release(hw);
1124         usb_put_dev(udev);
1125         complete(&rtlpriv->firmware_loading_complete);
1126         return -ENODEV;
1127 }
1128 EXPORT_SYMBOL(rtl_usb_probe);
1129
1130 void rtl_usb_disconnect(struct usb_interface *intf)
1131 {
1132         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1133         struct rtl_priv *rtlpriv = rtl_priv(hw);
1134         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1135         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1136
1137         if (unlikely(!rtlpriv))
1138                 return;
1139
1140         /* just in case driver is removed before firmware callback */
1141         wait_for_completion(&rtlpriv->firmware_loading_complete);
1142         /*ieee80211_unregister_hw will call ops_stop */
1143         if (rtlmac->mac80211_registered == 1) {
1144                 ieee80211_unregister_hw(hw);
1145                 rtlmac->mac80211_registered = 0;
1146         } else {
1147                 rtl_deinit_deferred_work(hw);
1148                 rtlpriv->intf_ops->adapter_stop(hw);
1149         }
1150         /*deinit rfkill */
1151         /* rtl_deinit_rfkill(hw); */
1152         rtl_usb_deinit(hw);
1153         rtl_deinit_core(hw);
1154         kfree(rtlpriv->usb_data);
1155         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1156         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1157         _rtl_usb_io_handler_release(hw);
1158         usb_put_dev(rtlusb->udev);
1159         usb_set_intfdata(intf, NULL);
1160         ieee80211_free_hw(hw);
1161 }
1162 EXPORT_SYMBOL(rtl_usb_disconnect);
1163
1164 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1165 {
1166         return 0;
1167 }
1168 EXPORT_SYMBOL(rtl_usb_suspend);
1169
1170 int rtl_usb_resume(struct usb_interface *pusb_intf)
1171 {
1172         return 0;
1173 }
1174 EXPORT_SYMBOL(rtl_usb_resume);