drivers/net/wireless/realtek/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  * The full GNU General Public License is included in this distribution in the
  15  * file called LICENSE.
  16  *
  17  * Contact Information:
  18  * wlanfae <wlanfae@realtek.com>
  19  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  20  * Hsinchu 300, Taiwan.
  21  *
  22  *****************************************************************************/
  23
  24 #include "wifi.h"
  25 #include "core.h"
  26 #include "usb.h"
  27 #include "base.h"
  28 #include "ps.h"
  29 #include "rtl8192c/fw_common.h"
  30 #include <linux/export.h>
  31 #include <linux/module.h>
  32
  33 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
  34 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
  35 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
  36 MODULE_LICENSE("GPL");
  37 MODULE_DESCRIPTION("USB basic driver for rtlwifi");
  38
  39 #define REALTEK_USB_VENQT_READ                  0xC0
  40 #define REALTEK_USB_VENQT_WRITE                 0x40
  41 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  42 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  43
  44 #define MAX_USBCTRL_VENDORREQ_TIMES             10
  45
  46 static void usbctrl_async_callback(struct urb *urb)
  47 {
  48         if (urb) {
  49                 /* free dr */
  50                 kfree(urb->setup_packet);
  51                 /* free databuf */
  52                 kfree(urb->transfer_buffer);
  53         }
  54 }
  55
  56 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  57                                           u16 value, u16 index, void *pdata,
  58                                           u16 len)
  59 {
  60         int rc;
  61         unsigned int pipe;
  62         u8 reqtype;
  63         struct usb_ctrlrequest *dr;
  64         struct urb *urb;
  65         const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
  66         u8 *databuf;
  67
  68         if (WARN_ON_ONCE(len > databuf_maxlen))
  69                 len = databuf_maxlen;
  70
  71         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  72         reqtype =  REALTEK_USB_VENQT_WRITE;
  73
  74         dr = kzalloc(sizeof(*dr), GFP_ATOMIC);
  75         if (!dr)
  76                 return -ENOMEM;
  77
  78         databuf = kzalloc(databuf_maxlen, GFP_ATOMIC);
  79         if (!databuf) {
  80                 kfree(dr);
  81                 return -ENOMEM;
  82         }
  83
  84         urb = usb_alloc_urb(0, GFP_ATOMIC);
  85         if (!urb) {
  86                 kfree(databuf);
  87                 kfree(dr);
  88                 return -ENOMEM;
  89         }
  90
  91         dr->bRequestType = reqtype;
  92         dr->bRequest = request;
  93         dr->wValue = cpu_to_le16(value);
  94         dr->wIndex = cpu_to_le16(index);
  95         dr->wLength = cpu_to_le16(len);
  96         /* data are already in little-endian order */
  97         memcpy(databuf, pdata, len);
  98         usb_fill_control_urb(urb, udev, pipe,
  99                              (unsigned char *)dr, databuf, len,
 100                              usbctrl_async_callback, NULL);
 101         rc = usb_submit_urb(urb, GFP_ATOMIC);
 102         if (rc < 0) {
 103                 kfree(databuf);
 104                 kfree(dr);
 105         }
 106         usb_free_urb(urb);
 107         return rc;
 108 }
 109
 110 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
 111                                         u16 value, u16 index, void *pdata,
 112                                         u16 len)
 113 {
 114         unsigned int pipe;
 115         int status;
 116         u8 reqtype;
 117         int vendorreq_times = 0;
 118         static int count;
 119
 120         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 121         reqtype =  REALTEK_USB_VENQT_READ;
 122
 123         do {
 124                 status = usb_control_msg(udev, pipe, request, reqtype, value,
 125                                          index, pdata, len, 1000);
 126                 if (status < 0) {
 127                         /* firmware download is checksumed, don't retry */
 128                         if ((value >= FW_8192C_START_ADDRESS &&
 129                             value <= FW_8192C_END_ADDRESS))
 130                                 break;
 131                 } else {
 132                         break;
 133                 }
 134         } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
 135
 136         if (status < 0 && count++ < 4)
 137                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 138                        value, status, *(u32 *)pdata);
 139         return status;
 140 }
 141
 142 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 143 {
 144         struct device *dev = rtlpriv->io.dev;
 145         struct usb_device *udev = to_usb_device(dev);
 146         u8 request;
 147         u16 wvalue;
 148         u16 index;
 149         __le32 *data;
 150         unsigned long flags;
 151
 152         spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
 153         if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 154                 rtlpriv->usb_data_index = 0;
 155         data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 156         spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 157         request = REALTEK_USB_VENQT_CMD_REQ;
 158         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 159
 160         wvalue = (u16)addr;
 161         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 162         return le32_to_cpu(*data);
 163 }
 164
 165 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 166 {
 167         return (u8)_usb_read_sync(rtlpriv, addr, 1);
 168 }
 169
 170 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 171 {
 172         return (u16)_usb_read_sync(rtlpriv, addr, 2);
 173 }
 174
 175 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 176 {
 177         return _usb_read_sync(rtlpriv, addr, 4);
 178 }
 179
 180 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 181                              u16 len)
 182 {
 183         u8 request;
 184         u16 wvalue;
 185         u16 index;
 186         __le32 data;
 187
 188         request = REALTEK_USB_VENQT_CMD_REQ;
 189         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 190         wvalue = (u16)(addr&0x0000ffff);
 191         data = cpu_to_le32(val);
 192         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 193                                        len);
 194 }
 195
 196 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 197 {
 198         struct device *dev = rtlpriv->io.dev;
 199
 200         _usb_write_async(to_usb_device(dev), addr, val, 1);
 201 }
 202
 203 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 204 {
 205         struct device *dev = rtlpriv->io.dev;
 206
 207         _usb_write_async(to_usb_device(dev), addr, val, 2);
 208 }
 209
 210 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 211 {
 212         struct device *dev = rtlpriv->io.dev;
 213
 214         _usb_write_async(to_usb_device(dev), addr, val, 4);
 215 }
 216
 217 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
 218                              u16 len)
 219 {
 220         struct device *dev = rtlpriv->io.dev;
 221         struct usb_device *udev = to_usb_device(dev);
 222         u8 request = REALTEK_USB_VENQT_CMD_REQ;
 223         u8 reqtype =  REALTEK_USB_VENQT_WRITE;
 224         u16 wvalue;
 225         u16 index = REALTEK_USB_VENQT_CMD_IDX;
 226         int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 227         u8 *buffer;
 228
 229         wvalue = (u16)(addr & 0x0000ffff);
 230         buffer = kmemdup(data, len, GFP_ATOMIC);
 231         if (!buffer)
 232                 return;
 233         usb_control_msg(udev, pipe, request, reqtype, wvalue,
 234                         index, buffer, len, 50);
 235
 236         kfree(buffer);
 237 }
 238
 239 static void _rtl_usb_io_handler_init(struct device *dev,
 240                                      struct ieee80211_hw *hw)
 241 {
 242         struct rtl_priv *rtlpriv = rtl_priv(hw);
 243
 244         rtlpriv->io.dev = dev;
 245         mutex_init(&rtlpriv->io.bb_mutex);
 246         rtlpriv->io.write8_async        = _usb_write8_async;
 247         rtlpriv->io.write16_async       = _usb_write16_async;
 248         rtlpriv->io.write32_async       = _usb_write32_async;
 249         rtlpriv->io.read8_sync          = _usb_read8_sync;
 250         rtlpriv->io.read16_sync         = _usb_read16_sync;
 251         rtlpriv->io.read32_sync         = _usb_read32_sync;
 252         rtlpriv->io.writeN_sync         = _usb_writeN_sync;
 253 }
 254
 255 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 256 {
 257         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 258
 259         mutex_destroy(&rtlpriv->io.bb_mutex);
 260 }
 261
 262 /**
 263  *
 264  *      Default aggregation handler. Do nothing and just return the oldest skb.
 265  */
 266 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 267                                                   struct sk_buff_head *list)
 268 {
 269         return skb_dequeue(list);
 270 }
 271
 272 #define IS_HIGH_SPEED_USB(udev) \
 273                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 274
 275 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 276 {
 277         u32 i;
 278         struct rtl_priv *rtlpriv = rtl_priv(hw);
 279         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 280
 281         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 282                                                     ? USB_HIGH_SPEED_BULK_SIZE
 283                                                     : USB_FULL_SPEED_BULK_SIZE;
 284
 285         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
 286                  rtlusb->max_bulk_out_size);
 287
 288         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 289                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 290                 if (!ep_num) {
 291                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 292                                  "Invalid endpoint map setting!\n");
 293                         return -EINVAL;
 294                 }
 295         }
 296
 297         rtlusb->usb_tx_post_hdl =
 298                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 299         rtlusb->usb_tx_cleanup  =
 300                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 301         rtlusb->usb_tx_aggregate_hdl =
 302                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 303                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 304                  : &_none_usb_tx_aggregate_hdl;
 305
 306         init_usb_anchor(&rtlusb->tx_submitted);
 307         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 308                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 309                 init_usb_anchor(&rtlusb->tx_pending[i]);
 310         }
 311         return 0;
 312 }
 313
 314 static void _rtl_rx_work(unsigned long param);
 315
 316 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 317 {
 318         struct rtl_priv *rtlpriv = rtl_priv(hw);
 319         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 320         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 321
 322         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 323         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 324         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 325         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 326         rtlusb->usb_rx_segregate_hdl =
 327                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 328
 329         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 330                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 331         init_usb_anchor(&rtlusb->rx_submitted);
 332         init_usb_anchor(&rtlusb->rx_cleanup_urbs);
 333
 334         skb_queue_head_init(&rtlusb->rx_queue);
 335         rtlusb->rx_work_tasklet.func = _rtl_rx_work;
 336         rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
 337
 338         return 0;
 339 }
 340
 341 static int _rtl_usb_init(struct ieee80211_hw *hw)
 342 {
 343         struct rtl_priv *rtlpriv = rtl_priv(hw);
 344         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 345         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 346         int err;
 347         u8 epidx;
 348         struct usb_interface    *usb_intf = rtlusb->intf;
 349         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 350
 351         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 352         for (epidx = 0; epidx < epnums; epidx++) {
 353                 struct usb_endpoint_descriptor *pep_desc;
 354                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 355
 356                 if (usb_endpoint_dir_in(pep_desc))
 357                         rtlusb->in_ep_nums++;
 358                 else if (usb_endpoint_dir_out(pep_desc))
 359                         rtlusb->out_ep_nums++;
 360
 361                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 362                          "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 363                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 364                          pep_desc->bInterval);
 365         }
 366         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 367                 pr_err("Too few input end points found\n");
 368                 return -EINVAL;
 369         }
 370         if (rtlusb->out_ep_nums == 0) {
 371                 pr_err("No output end points found\n");
 372                 return -EINVAL;
 373         }
 374         /* usb endpoint mapping */
 375         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 376         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 377         _rtl_usb_init_tx(hw);
 378         _rtl_usb_init_rx(hw);
 379         return err;
 380 }
 381
 382 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 383 {
 384         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 385         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 386         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 387         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 388
 389         rtlhal->hw = hw;
 390         ppsc->inactiveps = false;
 391         ppsc->leisure_ps = false;
 392         ppsc->fwctrl_lps = false;
 393         ppsc->reg_fwctrl_lps = 3;
 394         ppsc->reg_max_lps_awakeintvl = 5;
 395         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 396
 397          /* IBSS */
 398         mac->beacon_interval = 100;
 399
 400          /* AMPDU */
 401         mac->min_space_cfg = 0;
 402         mac->max_mss_density = 0;
 403
 404         /* set sane AMPDU defaults */
 405         mac->current_ampdu_density = 7;
 406         mac->current_ampdu_factor = 3;
 407
 408         /* QOS */
 409         rtlusb->acm_method = EACMWAY2_SW;
 410
 411         /* IRQ */
 412         /* HIMR - turn all on */
 413         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 414         /* HIMR_EX - turn all on */
 415         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 416         rtlusb->disableHWSM =  true;
 417 }
 418
 419 static void _rtl_rx_completed(struct urb *urb);
 420
 421 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
 422                               struct urb *urb, gfp_t gfp_mask)
 423 {
 424         struct rtl_priv *rtlpriv = rtl_priv(hw);
 425         void *buf;
 426
 427         buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
 428                                  &urb->transfer_dma);
 429         if (!buf) {
 430                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 431                          "Failed to usb_alloc_coherent!!\n");
 432                 return -ENOMEM;
 433         }
 434
 435         usb_fill_bulk_urb(urb, rtlusb->udev,
 436                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 437                           buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
 438         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 439
 440         return 0;
 441 }
 442
 443 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 444                                     struct sk_buff *skb)
 445 {
 446         struct rtl_priv *rtlpriv = rtl_priv(hw);
 447         u8 *rxdesc = skb->data;
 448         struct ieee80211_hdr *hdr;
 449         bool unicast = false;
 450         __le16 fc;
 451         struct ieee80211_rx_status rx_status = {0};
 452         struct rtl_stats stats = {
 453                 .signal = 0,
 454                 .rate = 0,
 455         };
 456
 457         skb_pull(skb, RTL_RX_DESC_SIZE);
 458         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 459         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 460         hdr = (struct ieee80211_hdr *)(skb->data);
 461         fc = hdr->frame_control;
 462         if (!stats.crc) {
 463                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 464
 465                 if (is_broadcast_ether_addr(hdr->addr1)) {
 466                         /*TODO*/;
 467                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 468                         /*TODO*/
 469                 } else {
 470                         unicast = true;
 471                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 472                 }
 473
 474                 if (ieee80211_is_data(fc)) {
 475                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 476
 477                         if (unicast)
 478                                 rtlpriv->link_info.num_rx_inperiod++;
 479                 }
 480                 /* static bcn for roaming */
 481                 rtl_beacon_statistic(hw, skb);
 482         }
 483 }
 484
 485 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 486                                       struct sk_buff *skb)
 487 {
 488         struct rtl_priv *rtlpriv = rtl_priv(hw);
 489         u8 *rxdesc = skb->data;
 490         struct ieee80211_hdr *hdr;
 491         bool unicast = false;
 492         __le16 fc;
 493         struct ieee80211_rx_status rx_status = {0};
 494         struct rtl_stats stats = {
 495                 .signal = 0,
 496                 .rate = 0,
 497         };
 498
 499         skb_pull(skb, RTL_RX_DESC_SIZE);
 500         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 501         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 502         hdr = (struct ieee80211_hdr *)(skb->data);
 503         fc = hdr->frame_control;
 504         if (!stats.crc) {
 505                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 506
 507                 if (is_broadcast_ether_addr(hdr->addr1)) {
 508                         /*TODO*/;
 509                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 510                         /*TODO*/
 511                 } else {
 512                         unicast = true;
 513                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 514                 }
 515
 516                 if (ieee80211_is_data(fc)) {
 517                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 518
 519                         if (unicast)
 520                                 rtlpriv->link_info.num_rx_inperiod++;
 521                 }
 522
 523                 /* static bcn for roaming */
 524                 rtl_beacon_statistic(hw, skb);
 525
 526                 if (likely(rtl_action_proc(hw, skb, false)))
 527                         ieee80211_rx(hw, skb);
 528                 else
 529                         dev_kfree_skb_any(skb);
 530         } else {
 531                 dev_kfree_skb_any(skb);
 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(hw, _skb);
 549         }
 550 }
 551
 552 #define __RX_SKB_MAX_QUEUED     64
 553
 554 static void _rtl_rx_work(unsigned long param)
 555 {
 556         struct rtl_usb *rtlusb = (struct rtl_usb *)param;
 557         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 558         struct sk_buff *skb;
 559
 560         while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
 561                 if (unlikely(IS_USB_STOP(rtlusb))) {
 562                         dev_kfree_skb_any(skb);
 563                         continue;
 564                 }
 565
 566                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 567                         _rtl_usb_rx_process_noagg(hw, skb);
 568                 } else {
 569                         /* TO DO */
 570                         _rtl_rx_pre_process(hw, skb);
 571                         pr_err("rx agg not supported\n");
 572                 }
 573         }
 574 }
 575
 576 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
 577                                         unsigned int len)
 578 {
 579 #if NET_IP_ALIGN != 0
 580         unsigned int padding = 0;
 581 #endif
 582
 583         /* make function no-op when possible */
 584         if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
 585                 return 0;
 586
 587 #if NET_IP_ALIGN != 0
 588         /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
 589         /* TODO: deduplicate common code, define helper function instead? */
 590
 591         if (ieee80211_is_data_qos(hdr->frame_control)) {
 592                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 593
 594                 padding ^= NET_IP_ALIGN;
 595
 596                 /* Input might be invalid, avoid accessing memory outside
 597                  * the buffer.
 598                  */
 599                 if ((unsigned long)qc - (unsigned long)hdr < len &&
 600                     *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 601                         padding ^= NET_IP_ALIGN;
 602         }
 603
 604         if (ieee80211_has_a4(hdr->frame_control))
 605                 padding ^= NET_IP_ALIGN;
 606
 607         return padding;
 608 #endif
 609 }
 610
 611 #define __RADIO_TAP_SIZE_RSV    32
 612
 613 static void _rtl_rx_completed(struct urb *_urb)
 614 {
 615         struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
 616         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 617         struct rtl_priv *rtlpriv = rtl_priv(hw);
 618         int err = 0;
 619
 620         if (unlikely(IS_USB_STOP(rtlusb)))
 621                 goto free;
 622
 623         if (likely(0 == _urb->status)) {
 624                 unsigned int padding;
 625                 struct sk_buff *skb;
 626                 unsigned int qlen;
 627                 unsigned int size = _urb->actual_length;
 628                 struct ieee80211_hdr *hdr;
 629
 630                 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
 631                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 632                                  "Too short packet from bulk IN! (len: %d)\n",
 633                                  size);
 634                         goto resubmit;
 635                 }
 636
 637                 qlen = skb_queue_len(&rtlusb->rx_queue);
 638                 if (qlen >= __RX_SKB_MAX_QUEUED) {
 639                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 640                                  "Pending RX skbuff queue full! (qlen: %d)\n",
 641                                  qlen);
 642                         goto resubmit;
 643                 }
 644
 645                 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
 646                 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
 647
 648                 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
 649                 if (!skb) {
 650                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 651                                  "Can't allocate skb for bulk IN!\n");
 652                         goto resubmit;
 653                 }
 654
 655                 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 656
 657                 /* Make sure the payload data is 4 byte aligned. */
 658                 skb_reserve(skb, padding);
 659
 660                 /* reserve some space for mac80211's radiotap */
 661                 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 662
 663                 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
 664
 665                 skb_queue_tail(&rtlusb->rx_queue, skb);
 666                 tasklet_schedule(&rtlusb->rx_work_tasklet);
 667
 668                 goto resubmit;
 669         }
 670
 671         switch (_urb->status) {
 672         /* disconnect */
 673         case -ENOENT:
 674         case -ECONNRESET:
 675         case -ENODEV:
 676         case -ESHUTDOWN:
 677                 goto free;
 678         default:
 679                 break;
 680         }
 681
 682 resubmit:
 683         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 684         err = usb_submit_urb(_urb, GFP_ATOMIC);
 685         if (unlikely(err)) {
 686                 usb_unanchor_urb(_urb);
 687                 goto free;
 688         }
 689         return;
 690
 691 free:
 692         /* On some architectures, usb_free_coherent must not be called from
 693          * hardirq context. Queue urb to cleanup list.
 694          */
 695         usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
 696 }
 697
 698 #undef __RADIO_TAP_SIZE_RSV
 699
 700 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
 701 {
 702         struct rtl_priv *rtlpriv = rtl_priv(hw);
 703         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 704         struct urb *urb;
 705
 706         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 707
 708         tasklet_kill(&rtlusb->rx_work_tasklet);
 709         cancel_work_sync(&rtlpriv->works.lps_change_work);
 710
 711         flush_workqueue(rtlpriv->works.rtl_wq);
 712         destroy_workqueue(rtlpriv->works.rtl_wq);
 713
 714         skb_queue_purge(&rtlusb->rx_queue);
 715
 716         while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
 717                 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 718                                 urb->transfer_buffer, urb->transfer_dma);
 719                 usb_free_urb(urb);
 720         }
 721 }
 722
 723 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 724 {
 725         struct urb *urb;
 726         int err;
 727         int i;
 728         struct rtl_priv *rtlpriv = rtl_priv(hw);
 729         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 730
 731         WARN_ON(0 == rtlusb->rx_urb_num);
 732         /* 1600 == 1514 + max WLAN header + rtk info */
 733         WARN_ON(rtlusb->rx_max_size < 1600);
 734
 735         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 736                 err = -ENOMEM;
 737                 urb = usb_alloc_urb(0, GFP_KERNEL);
 738                 if (!urb)
 739                         goto err_out;
 740
 741                 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 742                 if (err < 0) {
 743                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 744                                  "Failed to prep_rx_urb!!\n");
 745                         usb_free_urb(urb);
 746                         goto err_out;
 747                 }
 748
 749                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 750                 err = usb_submit_urb(urb, GFP_KERNEL);
 751                 if (err)
 752                         goto err_out;
 753                 usb_free_urb(urb);
 754         }
 755         return 0;
 756
 757 err_out:
 758         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 759         _rtl_usb_cleanup_rx(hw);
 760         return err;
 761 }
 762
 763 static int rtl_usb_start(struct ieee80211_hw *hw)
 764 {
 765         int err;
 766         struct rtl_priv *rtlpriv = rtl_priv(hw);
 767         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 768         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 769
 770         err = rtlpriv->cfg->ops->hw_init(hw);
 771         if (!err) {
 772                 rtl_init_rx_config(hw);
 773
 774                 /* Enable software */
 775                 SET_USB_START(rtlusb);
 776                 /* should after adapter start and interrupt enable. */
 777                 set_hal_start(rtlhal);
 778
 779                 /* Start bulk IN */
 780                 err = _rtl_usb_receive(hw);
 781         }
 782
 783         return err;
 784 }
 785 /**
 786  *
 787  *
 788  */
 789
 790 /*=======================  tx =========================================*/
 791 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 792 {
 793         u32 i;
 794         struct sk_buff *_skb;
 795         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 796         struct ieee80211_tx_info *txinfo;
 797
 798         /* clean up rx stuff. */
 799         _rtl_usb_cleanup_rx(hw);
 800
 801         /* clean up tx stuff */
 802         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 803                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 804                         rtlusb->usb_tx_cleanup(hw, _skb);
 805                         txinfo = IEEE80211_SKB_CB(_skb);
 806                         ieee80211_tx_info_clear_status(txinfo);
 807                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 808                         ieee80211_tx_status_irqsafe(hw, _skb);
 809                 }
 810                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 811         }
 812         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 813 }
 814
 815 /**
 816  *
 817  * We may add some struct into struct rtl_usb later. Do deinit here.
 818  *
 819  */
 820 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 821 {
 822         rtl_usb_cleanup(hw);
 823 }
 824
 825 static void rtl_usb_stop(struct ieee80211_hw *hw)
 826 {
 827         struct rtl_priv *rtlpriv = rtl_priv(hw);
 828         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 829         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 830
 831         /* should after adapter start and interrupt enable. */
 832         set_hal_stop(rtlhal);
 833         cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
 834         /* Enable software */
 835         SET_USB_STOP(rtlusb);
 836         rtlpriv->cfg->ops->hw_disable(hw);
 837 }
 838
 839 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 840 {
 841         int err;
 842         struct rtl_priv *rtlpriv = rtl_priv(hw);
 843         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 844
 845         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 846         err = usb_submit_urb(_urb, GFP_ATOMIC);
 847         if (err < 0) {
 848                 struct sk_buff *skb;
 849
 850                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 851                          "Failed to submit urb\n");
 852                 usb_unanchor_urb(_urb);
 853                 skb = (struct sk_buff *)_urb->context;
 854                 kfree_skb(skb);
 855         }
 856         usb_free_urb(_urb);
 857 }
 858
 859 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 860                         struct sk_buff *skb)
 861 {
 862         struct rtl_priv *rtlpriv = rtl_priv(hw);
 863         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 864         struct ieee80211_tx_info *txinfo;
 865
 866         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 867         skb_pull(skb, RTL_TX_HEADER_SIZE);
 868         txinfo = IEEE80211_SKB_CB(skb);
 869         ieee80211_tx_info_clear_status(txinfo);
 870         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 871
 872         if (urb->status) {
 873                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 874                          "Urb has error status 0x%X\n", urb->status);
 875                 goto out;
 876         }
 877         /*  TODO:       statistics */
 878 out:
 879         ieee80211_tx_status_irqsafe(hw, skb);
 880         return urb->status;
 881 }
 882
 883 static void _rtl_tx_complete(struct urb *urb)
 884 {
 885         struct sk_buff *skb = (struct sk_buff *)urb->context;
 886         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 887         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 888         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 889         int err;
 890
 891         if (unlikely(IS_USB_STOP(rtlusb)))
 892                 return;
 893         err = _usb_tx_post(hw, urb, skb);
 894         if (err) {
 895                 /* Ignore error and keep issuiing other urbs */
 896                 return;
 897         }
 898 }
 899
 900 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 901                                 struct sk_buff *skb, u32 ep_num)
 902 {
 903         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 904         struct urb *_urb;
 905
 906         WARN_ON(NULL == skb);
 907         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 908         if (!_urb) {
 909                 kfree_skb(skb);
 910                 return NULL;
 911         }
 912         _rtl_install_trx_info(rtlusb, skb, ep_num);
 913         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 914                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 915         _urb->transfer_flags |= URB_ZERO_PACKET;
 916         return _urb;
 917 }
 918
 919 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 920                        enum rtl_txq qnum)
 921 {
 922         struct rtl_priv *rtlpriv = rtl_priv(hw);
 923         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 924         u32 ep_num;
 925         struct urb *_urb = NULL;
 926         struct sk_buff *_skb = NULL;
 927
 928         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 929         if (unlikely(IS_USB_STOP(rtlusb))) {
 930                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 931                          "USB device is stopping...\n");
 932                 kfree_skb(skb);
 933                 return;
 934         }
 935         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 936         _skb = skb;
 937         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 938         if (unlikely(!_urb)) {
 939                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 940                          "Can't allocate urb. Drop skb!\n");
 941                 kfree_skb(skb);
 942                 return;
 943         }
 944         _rtl_submit_tx_urb(hw, _urb);
 945 }
 946
 947 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 948                                    struct ieee80211_sta *sta,
 949                                    struct sk_buff *skb,
 950                                    u16 hw_queue)
 951 {
 952         struct rtl_priv *rtlpriv = rtl_priv(hw);
 953         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 954         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 955         struct rtl_tx_desc *pdesc = NULL;
 956         struct rtl_tcb_desc tcb_desc;
 957         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 958         __le16 fc = hdr->frame_control;
 959         u8 *pda_addr = hdr->addr1;
 960         /* ssn */
 961         u8 *qc = NULL;
 962         u8 tid = 0;
 963         u16 seq_number = 0;
 964
 965         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 966         if (ieee80211_is_auth(fc)) {
 967                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 968                 rtl_ips_nic_on(hw);
 969         }
 970
 971         if (rtlpriv->psc.sw_ps_enabled) {
 972                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 973                     !ieee80211_has_pm(fc))
 974                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 975         }
 976
 977         rtl_action_proc(hw, skb, true);
 978         if (is_multicast_ether_addr(pda_addr))
 979                 rtlpriv->stats.txbytesmulticast += skb->len;
 980         else if (is_broadcast_ether_addr(pda_addr))
 981                 rtlpriv->stats.txbytesbroadcast += skb->len;
 982         else
 983                 rtlpriv->stats.txbytesunicast += skb->len;
 984         if (ieee80211_is_data_qos(fc)) {
 985                 qc = ieee80211_get_qos_ctl(hdr);
 986                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 987                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 988                              IEEE80211_SCTL_SEQ) >> 4;
 989                 seq_number += 1;
 990                 seq_number <<= 4;
 991         }
 992         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
 993                                         hw_queue, &tcb_desc);
 994         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 995                 if (qc)
 996                         mac->tids[tid].seq_number = seq_number;
 997         }
 998         if (ieee80211_is_data(fc))
 999                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1000 }
1001
1002 static int rtl_usb_tx(struct ieee80211_hw *hw,
1003                       struct ieee80211_sta *sta,
1004                       struct sk_buff *skb,
1005                       struct rtl_tcb_desc *dummy)
1006 {
1007         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1008         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1009         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1010         __le16 fc = hdr->frame_control;
1011         u16 hw_queue;
1012
1013         if (unlikely(is_hal_stop(rtlhal)))
1014                 goto err_free;
1015         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1016         _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1017         _rtl_usb_transmit(hw, skb, hw_queue);
1018         return NETDEV_TX_OK;
1019
1020 err_free:
1021         dev_kfree_skb_any(skb);
1022         return NETDEV_TX_OK;
1023 }
1024
1025 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1026                                         struct ieee80211_sta *sta,
1027                                         struct sk_buff *skb)
1028 {
1029         return false;
1030 }
1031
1032 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1033 {
1034         struct rtl_works *rtlworks =
1035             container_of(work, struct rtl_works, fill_h2c_cmd);
1036         struct ieee80211_hw *hw = rtlworks->hw;
1037         struct rtl_priv *rtlpriv = rtl_priv(hw);
1038
1039         rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1040 }
1041
1042 static const struct rtl_intf_ops rtl_usb_ops = {
1043         .adapter_start = rtl_usb_start,
1044         .adapter_stop = rtl_usb_stop,
1045         .adapter_tx = rtl_usb_tx,
1046         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1047 };
1048
1049 int rtl_usb_probe(struct usb_interface *intf,
1050                   const struct usb_device_id *id,
1051                   struct rtl_hal_cfg *rtl_hal_cfg)
1052 {
1053         int err;
1054         struct ieee80211_hw *hw = NULL;
1055         struct rtl_priv *rtlpriv = NULL;
1056         struct usb_device       *udev;
1057         struct rtl_usb_priv *usb_priv;
1058
1059         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1060                                 sizeof(struct rtl_usb_priv), &rtl_ops);
1061         if (!hw) {
1062                 RT_ASSERT(false, "ieee80211 alloc failed\n");
1063                 return -ENOMEM;
1064         }
1065         rtlpriv = hw->priv;
1066         rtlpriv->hw = hw;
1067         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1068                                     GFP_KERNEL);
1069         if (!rtlpriv->usb_data)
1070                 return -ENOMEM;
1071
1072         /* this spin lock must be initialized early */
1073         spin_lock_init(&rtlpriv->locks.usb_lock);
1074         INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1075                   rtl_fill_h2c_cmd_work_callback);
1076         INIT_WORK(&rtlpriv->works.lps_change_work,
1077                   rtl_lps_change_work_callback);
1078
1079         rtlpriv->usb_data_index = 0;
1080         init_completion(&rtlpriv->firmware_loading_complete);
1081         SET_IEEE80211_DEV(hw, &intf->dev);
1082         udev = interface_to_usbdev(intf);
1083         usb_get_dev(udev);
1084         usb_priv = rtl_usbpriv(hw);
1085         memset(usb_priv, 0, sizeof(*usb_priv));
1086         usb_priv->dev.intf = intf;
1087         usb_priv->dev.udev = udev;
1088         usb_set_intfdata(intf, hw);
1089         /* init cfg & intf_ops */
1090         rtlpriv->rtlhal.interface = INTF_USB;
1091         rtlpriv->cfg = rtl_hal_cfg;
1092         rtlpriv->intf_ops = &rtl_usb_ops;
1093         rtl_dbgp_flag_init(hw);
1094         /* Init IO handler */
1095         _rtl_usb_io_handler_init(&udev->dev, hw);
1096         rtlpriv->cfg->ops->read_chip_version(hw);
1097         /*like read eeprom and so on */
1098         rtlpriv->cfg->ops->read_eeprom_info(hw);
1099         err = _rtl_usb_init(hw);
1100         if (err)
1101                 goto error_out;
1102         rtl_usb_init_sw(hw);
1103         /* Init mac80211 sw */
1104         err = rtl_init_core(hw);
1105         if (err) {
1106                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1107                          "Can't allocate sw for mac80211\n");
1108                 goto error_out;
1109         }
1110         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1111                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1112                 goto error_out;
1113         }
1114         rtlpriv->cfg->ops->init_sw_leds(hw);
1115
1116         err = ieee80211_register_hw(hw);
1117         if (err) {
1118                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1119                          "Can't register mac80211 hw.\n");
1120                 err = -ENODEV;
1121                 goto error_out;
1122         }
1123         rtlpriv->mac80211.mac80211_registered = 1;
1124
1125         set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1126         return 0;
1127
1128 error_out:
1129         rtl_deinit_core(hw);
1130         _rtl_usb_io_handler_release(hw);
1131         usb_put_dev(udev);
1132         complete(&rtlpriv->firmware_loading_complete);
1133         return -ENODEV;
1134 }
1135 EXPORT_SYMBOL(rtl_usb_probe);
1136
1137 void rtl_usb_disconnect(struct usb_interface *intf)
1138 {
1139         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1140         struct rtl_priv *rtlpriv = rtl_priv(hw);
1141         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1142         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1143
1144         if (unlikely(!rtlpriv))
1145                 return;
1146         /* just in case driver is removed before firmware callback */
1147         wait_for_completion(&rtlpriv->firmware_loading_complete);
1148         clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
1149         /*ieee80211_unregister_hw will call ops_stop */
1150         if (rtlmac->mac80211_registered == 1) {
1151                 ieee80211_unregister_hw(hw);
1152                 rtlmac->mac80211_registered = 0;
1153         } else {
1154                 rtl_deinit_deferred_work(hw);
1155                 rtlpriv->intf_ops->adapter_stop(hw);
1156         }
1157         /*deinit rfkill */
1158         /* rtl_deinit_rfkill(hw); */
1159         rtl_usb_deinit(hw);
1160         rtl_deinit_core(hw);
1161         kfree(rtlpriv->usb_data);
1162         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1163         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1164         _rtl_usb_io_handler_release(hw);
1165         usb_put_dev(rtlusb->udev);
1166         usb_set_intfdata(intf, NULL);
1167         ieee80211_free_hw(hw);
1168 }
1169 EXPORT_SYMBOL(rtl_usb_disconnect);
1170
1171 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1172 {
1173         return 0;
1174 }
1175 EXPORT_SYMBOL(rtl_usb_suspend);
1176
1177 int rtl_usb_resume(struct usb_interface *pusb_intf)
1178 {
1179         return 0;
1180 }
1181 EXPORT_SYMBOL(rtl_usb_resume);