drivers/net/wireless/rtlwifi/usb.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2012  Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * wlanfae <wlanfae@realtek.com>
  23  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24  * Hsinchu 300, Taiwan.
  25  *
  26  *****************************************************************************/
  27
  28 #include "wifi.h"
  29 #include "core.h"
  30 #include "usb.h"
  31 #include "base.h"
  32 #include "ps.h"
  33 #include "rtl8192c/fw_common.h"
  34 #include <linux/export.h>
  35
  36 #define REALTEK_USB_VENQT_READ                  0xC0
  37 #define REALTEK_USB_VENQT_WRITE                 0x40
  38 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  39 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  40
  41 #define MAX_USBCTRL_VENDORREQ_TIMES             10
  42
  43 static void usbctrl_async_callback(struct urb *urb)
  44 {
  45         if (urb) {
  46                 /* free dr */
  47                 kfree(urb->setup_packet);
  48                 /* free databuf */
  49                 kfree(urb->transfer_buffer);
  50         }
  51 }
  52
  53 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  54                                           u16 value, u16 index, void *pdata,
  55                                           u16 len)
  56 {
  57         int rc;
  58         unsigned int pipe;
  59         u8 reqtype;
  60         struct usb_ctrlrequest *dr;
  61         struct urb *urb;
  62         const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
  63         u8 *databuf;
  64
  65         if (WARN_ON_ONCE(len > databuf_maxlen))
  66                 len = databuf_maxlen;
  67
  68         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  69         reqtype =  REALTEK_USB_VENQT_WRITE;
  70
  71         dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
  72         if (!dr)
  73                 return -ENOMEM;
  74
  75         databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
  76         if (!databuf) {
  77                 kfree(dr);
  78                 return -ENOMEM;
  79         }
  80
  81         urb = usb_alloc_urb(0, GFP_ATOMIC);
  82         if (!urb) {
  83                 kfree(databuf);
  84                 kfree(dr);
  85                 return -ENOMEM;
  86         }
  87
  88         dr->bRequestType = reqtype;
  89         dr->bRequest = request;
  90         dr->wValue = cpu_to_le16(value);
  91         dr->wIndex = cpu_to_le16(index);
  92         dr->wLength = cpu_to_le16(len);
  93         /* data are already in little-endian order */
  94         memcpy(databuf, pdata, len);
  95         usb_fill_control_urb(urb, udev, pipe,
  96                              (unsigned char *)dr, databuf, len,
  97                              usbctrl_async_callback, NULL);
  98         rc = usb_submit_urb(urb, GFP_ATOMIC);
  99         if (rc < 0) {
 100                 kfree(databuf);
 101                 kfree(dr);
 102         }
 103         usb_free_urb(urb);
 104         return rc;
 105 }
 106
 107 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
 108                                         u16 value, u16 index, void *pdata,
 109                                         u16 len)
 110 {
 111         unsigned int pipe;
 112         int status;
 113         u8 reqtype;
 114         int vendorreq_times = 0;
 115         static int count;
 116
 117         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 118         reqtype =  REALTEK_USB_VENQT_READ;
 119
 120         do {
 121                 status = usb_control_msg(udev, pipe, request, reqtype, value,
 122                                          index, pdata, len, 0); /*max. timeout*/
 123                 if (status < 0) {
 124                         /* firmware download is checksumed, don't retry */
 125                         if ((value >= FW_8192C_START_ADDRESS &&
 126                             value <= FW_8192C_END_ADDRESS))
 127                                 break;
 128                 } else {
 129                         break;
 130                 }
 131         } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
 132
 133         if (status < 0 && count++ < 4)
 134                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 135                        value, status, *(u32 *)pdata);
 136         return status;
 137 }
 138
 139 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 140 {
 141         struct device *dev = rtlpriv->io.dev;
 142         struct usb_device *udev = to_usb_device(dev);
 143         u8 request;
 144         u16 wvalue;
 145         u16 index;
 146         __le32 *data;
 147         unsigned long flags;
 148
 149         spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
 150         if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 151                 rtlpriv->usb_data_index = 0;
 152         data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 153         spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 154         request = REALTEK_USB_VENQT_CMD_REQ;
 155         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 156
 157         wvalue = (u16)addr;
 158         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 159         return le32_to_cpu(*data);
 160 }
 161
 162 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 163 {
 164         return (u8)_usb_read_sync(rtlpriv, addr, 1);
 165 }
 166
 167 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 168 {
 169         return (u16)_usb_read_sync(rtlpriv, addr, 2);
 170 }
 171
 172 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 173 {
 174         return _usb_read_sync(rtlpriv, addr, 4);
 175 }
 176
 177 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 178                              u16 len)
 179 {
 180         u8 request;
 181         u16 wvalue;
 182         u16 index;
 183         __le32 data;
 184
 185         request = REALTEK_USB_VENQT_CMD_REQ;
 186         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 187         wvalue = (u16)(addr&0x0000ffff);
 188         data = cpu_to_le32(val);
 189         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 190                                        len);
 191 }
 192
 193 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 194 {
 195         struct device *dev = rtlpriv->io.dev;
 196
 197         _usb_write_async(to_usb_device(dev), addr, val, 1);
 198 }
 199
 200 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 201 {
 202         struct device *dev = rtlpriv->io.dev;
 203
 204         _usb_write_async(to_usb_device(dev), addr, val, 2);
 205 }
 206
 207 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 208 {
 209         struct device *dev = rtlpriv->io.dev;
 210
 211         _usb_write_async(to_usb_device(dev), addr, val, 4);
 212 }
 213
 214 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
 215                              u16 len)
 216 {
 217         struct device *dev = rtlpriv->io.dev;
 218         struct usb_device *udev = to_usb_device(dev);
 219         u8 request = REALTEK_USB_VENQT_CMD_REQ;
 220         u8 reqtype =  REALTEK_USB_VENQT_WRITE;
 221         u16 wvalue;
 222         u16 index = REALTEK_USB_VENQT_CMD_IDX;
 223         int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 224         u8 *buffer;
 225
 226         wvalue = (u16)(addr & 0x0000ffff);
 227         buffer = kmemdup(data, len, GFP_ATOMIC);
 228         if (!buffer)
 229                 return;
 230         usb_control_msg(udev, pipe, request, reqtype, wvalue,
 231                         index, buffer, len, 50);
 232
 233         kfree(buffer);
 234 }
 235
 236 static void _rtl_usb_io_handler_init(struct device *dev,
 237                                      struct ieee80211_hw *hw)
 238 {
 239         struct rtl_priv *rtlpriv = rtl_priv(hw);
 240
 241         rtlpriv->io.dev = dev;
 242         mutex_init(&rtlpriv->io.bb_mutex);
 243         rtlpriv->io.write8_async        = _usb_write8_async;
 244         rtlpriv->io.write16_async       = _usb_write16_async;
 245         rtlpriv->io.write32_async       = _usb_write32_async;
 246         rtlpriv->io.read8_sync          = _usb_read8_sync;
 247         rtlpriv->io.read16_sync         = _usb_read16_sync;
 248         rtlpriv->io.read32_sync         = _usb_read32_sync;
 249         rtlpriv->io.writeN_sync         = _usb_writeN_sync;
 250 }
 251
 252 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 253 {
 254         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 255
 256         mutex_destroy(&rtlpriv->io.bb_mutex);
 257 }
 258
 259 /**
 260  *
 261  *      Default aggregation handler. Do nothing and just return the oldest skb.
 262  */
 263 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 264                                                   struct sk_buff_head *list)
 265 {
 266         return skb_dequeue(list);
 267 }
 268
 269 #define IS_HIGH_SPEED_USB(udev) \
 270                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 271
 272 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 273 {
 274         u32 i;
 275         struct rtl_priv *rtlpriv = rtl_priv(hw);
 276         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 277
 278         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 279                                                     ? USB_HIGH_SPEED_BULK_SIZE
 280                                                     : USB_FULL_SPEED_BULK_SIZE;
 281
 282         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
 283                  rtlusb->max_bulk_out_size);
 284
 285         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 286                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 287                 if (!ep_num) {
 288                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 289                                  "Invalid endpoint map setting!\n");
 290                         return -EINVAL;
 291                 }
 292         }
 293
 294         rtlusb->usb_tx_post_hdl =
 295                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 296         rtlusb->usb_tx_cleanup  =
 297                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 298         rtlusb->usb_tx_aggregate_hdl =
 299                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 300                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 301                  : &_none_usb_tx_aggregate_hdl;
 302
 303         init_usb_anchor(&rtlusb->tx_submitted);
 304         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 305                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 306                 init_usb_anchor(&rtlusb->tx_pending[i]);
 307         }
 308         return 0;
 309 }
 310
 311 static void _rtl_rx_work(unsigned long param);
 312
 313 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 314 {
 315         struct rtl_priv *rtlpriv = rtl_priv(hw);
 316         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 317         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 318
 319         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 320         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 321         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 322         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 323         rtlusb->usb_rx_segregate_hdl =
 324                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 325
 326         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 327                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 328         init_usb_anchor(&rtlusb->rx_submitted);
 329         init_usb_anchor(&rtlusb->rx_cleanup_urbs);
 330
 331         skb_queue_head_init(&rtlusb->rx_queue);
 332         rtlusb->rx_work_tasklet.func = _rtl_rx_work;
 333         rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
 334
 335         return 0;
 336 }
 337
 338 static int _rtl_usb_init(struct ieee80211_hw *hw)
 339 {
 340         struct rtl_priv *rtlpriv = rtl_priv(hw);
 341         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 342         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 343         int err;
 344         u8 epidx;
 345         struct usb_interface    *usb_intf = rtlusb->intf;
 346         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 347
 348         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 349         for (epidx = 0; epidx < epnums; epidx++) {
 350                 struct usb_endpoint_descriptor *pep_desc;
 351                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 352
 353                 if (usb_endpoint_dir_in(pep_desc))
 354                         rtlusb->in_ep_nums++;
 355                 else if (usb_endpoint_dir_out(pep_desc))
 356                         rtlusb->out_ep_nums++;
 357
 358                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 359                          "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 360                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 361                          pep_desc->bInterval);
 362         }
 363         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 364                 pr_err("Too few input end points found\n");
 365                 return -EINVAL;
 366         }
 367         if (rtlusb->out_ep_nums == 0) {
 368                 pr_err("No output end points found\n");
 369                 return -EINVAL;
 370         }
 371         /* usb endpoint mapping */
 372         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 373         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 374         _rtl_usb_init_tx(hw);
 375         _rtl_usb_init_rx(hw);
 376         return err;
 377 }
 378
 379 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 380 {
 381         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 382         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 383         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 384         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 385
 386         rtlhal->hw = hw;
 387         ppsc->inactiveps = false;
 388         ppsc->leisure_ps = false;
 389         ppsc->fwctrl_lps = false;
 390         ppsc->reg_fwctrl_lps = 3;
 391         ppsc->reg_max_lps_awakeintvl = 5;
 392         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 393
 394          /* IBSS */
 395         mac->beacon_interval = 100;
 396
 397          /* AMPDU */
 398         mac->min_space_cfg = 0;
 399         mac->max_mss_density = 0;
 400
 401         /* set sane AMPDU defaults */
 402         mac->current_ampdu_density = 7;
 403         mac->current_ampdu_factor = 3;
 404
 405         /* QOS */
 406         rtlusb->acm_method = eAcmWay2_SW;
 407
 408         /* IRQ */
 409         /* HIMR - turn all on */
 410         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 411         /* HIMR_EX - turn all on */
 412         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 413         rtlusb->disableHWSM =  true;
 414 }
 415
 416 static void _rtl_rx_completed(struct urb *urb);
 417
 418 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
 419                               struct urb *urb, gfp_t gfp_mask)
 420 {
 421         struct rtl_priv *rtlpriv = rtl_priv(hw);
 422         void *buf;
 423
 424         buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
 425                                  &urb->transfer_dma);
 426         if (!buf) {
 427                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 428                          "Failed to usb_alloc_coherent!!\n");
 429                 return -ENOMEM;
 430         }
 431
 432         usb_fill_bulk_urb(urb, rtlusb->udev,
 433                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 434                           buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
 435         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 436
 437         return 0;
 438 }
 439
 440 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 441                                     struct sk_buff *skb)
 442 {
 443         struct rtl_priv *rtlpriv = rtl_priv(hw);
 444         u8 *rxdesc = skb->data;
 445         struct ieee80211_hdr *hdr;
 446         bool unicast = false;
 447         __le16 fc;
 448         struct ieee80211_rx_status rx_status = {0};
 449         struct rtl_stats stats = {
 450                 .signal = 0,
 451                 .noise = -98,
 452                 .rate = 0,
 453         };
 454
 455         skb_pull(skb, RTL_RX_DESC_SIZE);
 456         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 457         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 458         hdr = (struct ieee80211_hdr *)(skb->data);
 459         fc = hdr->frame_control;
 460         if (!stats.crc) {
 461                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 462
 463                 if (is_broadcast_ether_addr(hdr->addr1)) {
 464                         /*TODO*/;
 465                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 466                         /*TODO*/
 467                 } else {
 468                         unicast = true;
 469                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 470                 }
 471
 472                 rtl_is_special_data(hw, skb, false);
 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         }
 481 }
 482
 483 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 484                                       struct sk_buff *skb)
 485 {
 486         struct rtl_priv *rtlpriv = rtl_priv(hw);
 487         u8 *rxdesc = skb->data;
 488         struct ieee80211_hdr *hdr;
 489         bool unicast = false;
 490         __le16 fc;
 491         struct ieee80211_rx_status rx_status = {0};
 492         struct rtl_stats stats = {
 493                 .signal = 0,
 494                 .noise = -98,
 495                 .rate = 0,
 496         };
 497
 498         skb_pull(skb, RTL_RX_DESC_SIZE);
 499         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 500         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 501         hdr = (struct ieee80211_hdr *)(skb->data);
 502         fc = hdr->frame_control;
 503         if (!stats.crc) {
 504                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 505
 506                 if (is_broadcast_ether_addr(hdr->addr1)) {
 507                         /*TODO*/;
 508                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 509                         /*TODO*/
 510                 } else {
 511                         unicast = true;
 512                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 513                 }
 514
 515                 rtl_is_special_data(hw, skb, false);
 516
 517                 if (ieee80211_is_data(fc)) {
 518                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 519
 520                         if (unicast)
 521                                 rtlpriv->link_info.num_rx_inperiod++;
 522                 }
 523
 524                 if (likely(rtl_action_proc(hw, skb, false)))
 525                         ieee80211_rx(hw, skb);
 526                 else
 527                         dev_kfree_skb_any(skb);
 528         }
 529 }
 530
 531 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 532 {
 533         struct sk_buff *_skb;
 534         struct sk_buff_head rx_queue;
 535         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 536
 537         skb_queue_head_init(&rx_queue);
 538         if (rtlusb->usb_rx_segregate_hdl)
 539                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 540         WARN_ON(skb_queue_empty(&rx_queue));
 541         while (!skb_queue_empty(&rx_queue)) {
 542                 _skb = skb_dequeue(&rx_queue);
 543                 _rtl_usb_rx_process_agg(hw, _skb);
 544                 ieee80211_rx(hw, _skb);
 545         }
 546 }
 547
 548 #define __RX_SKB_MAX_QUEUED     32
 549
 550 static void _rtl_rx_work(unsigned long param)
 551 {
 552         struct rtl_usb *rtlusb = (struct rtl_usb *)param;
 553         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 554         struct sk_buff *skb;
 555
 556         while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
 557                 if (unlikely(IS_USB_STOP(rtlusb))) {
 558                         dev_kfree_skb_any(skb);
 559                         continue;
 560                 }
 561
 562                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 563                         _rtl_usb_rx_process_noagg(hw, skb);
 564                 } else {
 565                         /* TO DO */
 566                         _rtl_rx_pre_process(hw, skb);
 567                         pr_err("rx agg not supported\n");
 568                 }
 569         }
 570 }
 571
 572 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
 573                                         unsigned int len)
 574 {
 575         unsigned int padding = 0;
 576
 577         /* make function no-op when possible */
 578         if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
 579                 return 0;
 580
 581         /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
 582         /* TODO: deduplicate common code, define helper function instead? */
 583
 584         if (ieee80211_is_data_qos(hdr->frame_control)) {
 585                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 586
 587                 padding ^= NET_IP_ALIGN;
 588
 589                 /* Input might be invalid, avoid accessing memory outside
 590                  * the buffer.
 591                  */
 592                 if ((unsigned long)qc - (unsigned long)hdr < len &&
 593                     *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 594                         padding ^= NET_IP_ALIGN;
 595         }
 596
 597         if (ieee80211_has_a4(hdr->frame_control))
 598                 padding ^= NET_IP_ALIGN;
 599
 600         return padding;
 601 }
 602
 603 #define __RADIO_TAP_SIZE_RSV    32
 604
 605 static void _rtl_rx_completed(struct urb *_urb)
 606 {
 607         struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
 608         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 609         struct rtl_priv *rtlpriv = rtl_priv(hw);
 610         int err = 0;
 611
 612         if (unlikely(IS_USB_STOP(rtlusb)))
 613                 goto free;
 614
 615         if (likely(0 == _urb->status)) {
 616                 unsigned int padding;
 617                 struct sk_buff *skb;
 618                 unsigned int qlen;
 619                 unsigned int size = _urb->actual_length;
 620                 struct ieee80211_hdr *hdr;
 621
 622                 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
 623                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 624                                  "Too short packet from bulk IN! (len: %d)\n",
 625                                  size);
 626                         goto resubmit;
 627                 }
 628
 629                 qlen = skb_queue_len(&rtlusb->rx_queue);
 630                 if (qlen >= __RX_SKB_MAX_QUEUED) {
 631                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 632                                  "Pending RX skbuff queue full! (qlen: %d)\n",
 633                                  qlen);
 634                         goto resubmit;
 635                 }
 636
 637                 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
 638                 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
 639
 640                 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
 641                 if (!skb) {
 642                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 643                                  "Can't allocate skb for bulk IN!\n");
 644                         goto resubmit;
 645                 }
 646
 647                 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 648
 649                 /* Make sure the payload data is 4 byte aligned. */
 650                 skb_reserve(skb, padding);
 651
 652                 /* reserve some space for mac80211's radiotap */
 653                 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 654
 655                 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
 656
 657                 skb_queue_tail(&rtlusb->rx_queue, skb);
 658                 tasklet_schedule(&rtlusb->rx_work_tasklet);
 659
 660                 goto resubmit;
 661         }
 662
 663         switch (_urb->status) {
 664         /* disconnect */
 665         case -ENOENT:
 666         case -ECONNRESET:
 667         case -ENODEV:
 668         case -ESHUTDOWN:
 669                 goto free;
 670         default:
 671                 break;
 672         }
 673
 674 resubmit:
 675         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 676         err = usb_submit_urb(_urb, GFP_ATOMIC);
 677         if (unlikely(err)) {
 678                 usb_unanchor_urb(_urb);
 679                 goto free;
 680         }
 681         return;
 682
 683 free:
 684         /* On some architectures, usb_free_coherent must not be called from
 685          * hardirq context. Queue urb to cleanup list.
 686          */
 687         usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
 688 }
 689
 690 #undef __RADIO_TAP_SIZE_RSV
 691
 692 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
 693 {
 694         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 695         struct urb *urb;
 696
 697         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 698
 699         tasklet_kill(&rtlusb->rx_work_tasklet);
 700         skb_queue_purge(&rtlusb->rx_queue);
 701
 702         while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
 703                 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 704                                 urb->transfer_buffer, urb->transfer_dma);
 705                 usb_free_urb(urb);
 706         }
 707 }
 708
 709 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 710 {
 711         struct urb *urb;
 712         int err;
 713         int i;
 714         struct rtl_priv *rtlpriv = rtl_priv(hw);
 715         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 716
 717         WARN_ON(0 == rtlusb->rx_urb_num);
 718         /* 1600 == 1514 + max WLAN header + rtk info */
 719         WARN_ON(rtlusb->rx_max_size < 1600);
 720
 721         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 722                 err = -ENOMEM;
 723                 urb = usb_alloc_urb(0, GFP_KERNEL);
 724                 if (!urb) {
 725                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 726                                  "Failed to alloc URB!!\n");
 727                         goto err_out;
 728                 }
 729
 730                 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 731                 if (err < 0) {
 732                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 733                                  "Failed to prep_rx_urb!!\n");
 734                         usb_free_urb(urb);
 735                         goto err_out;
 736                 }
 737
 738                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 739                 err = usb_submit_urb(urb, GFP_KERNEL);
 740                 if (err)
 741                         goto err_out;
 742                 usb_free_urb(urb);
 743         }
 744         return 0;
 745
 746 err_out:
 747         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 748         _rtl_usb_cleanup_rx(hw);
 749         return err;
 750 }
 751
 752 static int rtl_usb_start(struct ieee80211_hw *hw)
 753 {
 754         int err;
 755         struct rtl_priv *rtlpriv = rtl_priv(hw);
 756         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 757         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 758
 759         err = rtlpriv->cfg->ops->hw_init(hw);
 760         if (!err) {
 761                 rtl_init_rx_config(hw);
 762
 763                 /* Enable software */
 764                 SET_USB_START(rtlusb);
 765                 /* should after adapter start and interrupt enable. */
 766                 set_hal_start(rtlhal);
 767
 768                 /* Start bulk IN */
 769                 err = _rtl_usb_receive(hw);
 770         }
 771
 772         return err;
 773 }
 774 /**
 775  *
 776  *
 777  */
 778
 779 /*=======================  tx =========================================*/
 780 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 781 {
 782         u32 i;
 783         struct sk_buff *_skb;
 784         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 785         struct ieee80211_tx_info *txinfo;
 786
 787         SET_USB_STOP(rtlusb);
 788
 789         /* clean up rx stuff. */
 790         _rtl_usb_cleanup_rx(hw);
 791
 792         /* clean up tx stuff */
 793         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 794                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 795                         rtlusb->usb_tx_cleanup(hw, _skb);
 796                         txinfo = IEEE80211_SKB_CB(_skb);
 797                         ieee80211_tx_info_clear_status(txinfo);
 798                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 799                         ieee80211_tx_status_irqsafe(hw, _skb);
 800                 }
 801                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 802         }
 803         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 804 }
 805
 806 /**
 807  *
 808  * We may add some struct into struct rtl_usb later. Do deinit here.
 809  *
 810  */
 811 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 812 {
 813         rtl_usb_cleanup(hw);
 814 }
 815
 816 static void rtl_usb_stop(struct ieee80211_hw *hw)
 817 {
 818         struct rtl_priv *rtlpriv = rtl_priv(hw);
 819         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 820         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 821
 822         /* should after adapter start and interrupt enable. */
 823         set_hal_stop(rtlhal);
 824         /* Enable software */
 825         SET_USB_STOP(rtlusb);
 826         rtl_usb_deinit(hw);
 827         rtlpriv->cfg->ops->hw_disable(hw);
 828 }
 829
 830 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 831 {
 832         int err;
 833         struct rtl_priv *rtlpriv = rtl_priv(hw);
 834         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 835
 836         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 837         err = usb_submit_urb(_urb, GFP_ATOMIC);
 838         if (err < 0) {
 839                 struct sk_buff *skb;
 840
 841                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 842                          "Failed to submit urb\n");
 843                 usb_unanchor_urb(_urb);
 844                 skb = (struct sk_buff *)_urb->context;
 845                 kfree_skb(skb);
 846         }
 847         usb_free_urb(_urb);
 848 }
 849
 850 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 851                         struct sk_buff *skb)
 852 {
 853         struct rtl_priv *rtlpriv = rtl_priv(hw);
 854         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 855         struct ieee80211_tx_info *txinfo;
 856
 857         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 858         skb_pull(skb, RTL_TX_HEADER_SIZE);
 859         txinfo = IEEE80211_SKB_CB(skb);
 860         ieee80211_tx_info_clear_status(txinfo);
 861         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 862
 863         if (urb->status) {
 864                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 865                          "Urb has error status 0x%X\n", urb->status);
 866                 goto out;
 867         }
 868         /*  TODO:       statistics */
 869 out:
 870         ieee80211_tx_status_irqsafe(hw, skb);
 871         return urb->status;
 872 }
 873
 874 static void _rtl_tx_complete(struct urb *urb)
 875 {
 876         struct sk_buff *skb = (struct sk_buff *)urb->context;
 877         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 878         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 879         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 880         int err;
 881
 882         if (unlikely(IS_USB_STOP(rtlusb)))
 883                 return;
 884         err = _usb_tx_post(hw, urb, skb);
 885         if (err) {
 886                 /* Ignore error and keep issuiing other urbs */
 887                 return;
 888         }
 889 }
 890
 891 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 892                                 struct sk_buff *skb, u32 ep_num)
 893 {
 894         struct rtl_priv *rtlpriv = rtl_priv(hw);
 895         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 896         struct urb *_urb;
 897
 898         WARN_ON(NULL == skb);
 899         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 900         if (!_urb) {
 901                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 902                          "Can't allocate URB for bulk out!\n");
 903                 kfree_skb(skb);
 904                 return NULL;
 905         }
 906         _rtl_install_trx_info(rtlusb, skb, ep_num);
 907         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 908                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 909         _urb->transfer_flags |= URB_ZERO_PACKET;
 910         return _urb;
 911 }
 912
 913 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 914                        enum rtl_txq qnum)
 915 {
 916         struct rtl_priv *rtlpriv = rtl_priv(hw);
 917         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 918         u32 ep_num;
 919         struct urb *_urb = NULL;
 920         struct sk_buff *_skb = NULL;
 921
 922         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 923         if (unlikely(IS_USB_STOP(rtlusb))) {
 924                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 925                          "USB device is stopping...\n");
 926                 kfree_skb(skb);
 927                 return;
 928         }
 929         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 930         _skb = skb;
 931         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 932         if (unlikely(!_urb)) {
 933                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 934                          "Can't allocate urb. Drop skb!\n");
 935                 kfree_skb(skb);
 936                 return;
 937         }
 938         _rtl_submit_tx_urb(hw, _urb);
 939 }
 940
 941 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 942                                    struct ieee80211_sta *sta,
 943                                    struct sk_buff *skb,
 944                                    u16 hw_queue)
 945 {
 946         struct rtl_priv *rtlpriv = rtl_priv(hw);
 947         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 948         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 949         struct rtl_tx_desc *pdesc = NULL;
 950         struct rtl_tcb_desc tcb_desc;
 951         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 952         __le16 fc = hdr->frame_control;
 953         u8 *pda_addr = hdr->addr1;
 954         /* ssn */
 955         u8 *qc = NULL;
 956         u8 tid = 0;
 957         u16 seq_number = 0;
 958
 959         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 960         if (ieee80211_is_auth(fc)) {
 961                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 962                 rtl_ips_nic_on(hw);
 963         }
 964
 965         if (rtlpriv->psc.sw_ps_enabled) {
 966                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 967                     !ieee80211_has_pm(fc))
 968                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 969         }
 970
 971         rtl_action_proc(hw, skb, true);
 972         if (is_multicast_ether_addr(pda_addr))
 973                 rtlpriv->stats.txbytesmulticast += skb->len;
 974         else if (is_broadcast_ether_addr(pda_addr))
 975                 rtlpriv->stats.txbytesbroadcast += skb->len;
 976         else
 977                 rtlpriv->stats.txbytesunicast += skb->len;
 978         if (ieee80211_is_data_qos(fc)) {
 979                 qc = ieee80211_get_qos_ctl(hdr);
 980                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 981                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 982                              IEEE80211_SCTL_SEQ) >> 4;
 983                 seq_number += 1;
 984                 seq_number <<= 4;
 985         }
 986         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
 987                                         hw_queue, &tcb_desc);
 988         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 989                 if (qc)
 990                         mac->tids[tid].seq_number = seq_number;
 991         }
 992         if (ieee80211_is_data(fc))
 993                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 994 }
 995
 996 static int rtl_usb_tx(struct ieee80211_hw *hw,
 997                       struct ieee80211_sta *sta,
 998                       struct sk_buff *skb,
 999                       struct rtl_tcb_desc *dummy)
1000 {
1001         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1002         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1003         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1004         __le16 fc = hdr->frame_control;
1005         u16 hw_queue;
1006
1007         if (unlikely(is_hal_stop(rtlhal)))
1008                 goto err_free;
1009         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1010         _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1011         _rtl_usb_transmit(hw, skb, hw_queue);
1012         return NETDEV_TX_OK;
1013
1014 err_free:
1015         dev_kfree_skb_any(skb);
1016         return NETDEV_TX_OK;
1017 }
1018
1019 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1020                                         struct ieee80211_sta *sta,
1021                                         struct sk_buff *skb)
1022 {
1023         return false;
1024 }
1025
1026 static struct rtl_intf_ops rtl_usb_ops = {
1027         .adapter_start = rtl_usb_start,
1028         .adapter_stop = rtl_usb_stop,
1029         .adapter_tx = rtl_usb_tx,
1030         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
1031 };
1032
1033 int rtl_usb_probe(struct usb_interface *intf,
1034                   const struct usb_device_id *id,
1035                   struct rtl_hal_cfg *rtl_hal_cfg)
1036 {
1037         int err;
1038         struct ieee80211_hw *hw = NULL;
1039         struct rtl_priv *rtlpriv = NULL;
1040         struct usb_device       *udev;
1041         struct rtl_usb_priv *usb_priv;
1042
1043         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1044                                 sizeof(struct rtl_usb_priv), &rtl_ops);
1045         if (!hw) {
1046                 RT_ASSERT(false, "ieee80211 alloc failed\n");
1047                 return -ENOMEM;
1048         }
1049         rtlpriv = hw->priv;
1050         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1051                                     GFP_KERNEL);
1052         if (!rtlpriv->usb_data)
1053                 return -ENOMEM;
1054
1055         /* this spin lock must be initialized early */
1056         spin_lock_init(&rtlpriv->locks.usb_lock);
1057
1058         rtlpriv->usb_data_index = 0;
1059         init_completion(&rtlpriv->firmware_loading_complete);
1060         SET_IEEE80211_DEV(hw, &intf->dev);
1061         udev = interface_to_usbdev(intf);
1062         usb_get_dev(udev);
1063         usb_priv = rtl_usbpriv(hw);
1064         memset(usb_priv, 0, sizeof(*usb_priv));
1065         usb_priv->dev.intf = intf;
1066         usb_priv->dev.udev = udev;
1067         usb_set_intfdata(intf, hw);
1068         /* init cfg & intf_ops */
1069         rtlpriv->rtlhal.interface = INTF_USB;
1070         rtlpriv->cfg = rtl_hal_cfg;
1071         rtlpriv->intf_ops = &rtl_usb_ops;
1072         rtl_dbgp_flag_init(hw);
1073         /* Init IO handler */
1074         _rtl_usb_io_handler_init(&udev->dev, hw);
1075         rtlpriv->cfg->ops->read_chip_version(hw);
1076         /*like read eeprom and so on */
1077         rtlpriv->cfg->ops->read_eeprom_info(hw);
1078         err = _rtl_usb_init(hw);
1079         if (err)
1080                 goto error_out;
1081         rtl_usb_init_sw(hw);
1082         /* Init mac80211 sw */
1083         err = rtl_init_core(hw);
1084         if (err) {
1085                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1086                          "Can't allocate sw for mac80211\n");
1087                 goto error_out;
1088         }
1089         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1090                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1091                 goto error_out;
1092         }
1093         rtlpriv->cfg->ops->init_sw_leds(hw);
1094
1095         return 0;
1096 error_out:
1097         rtl_deinit_core(hw);
1098         _rtl_usb_io_handler_release(hw);
1099         usb_put_dev(udev);
1100         complete(&rtlpriv->firmware_loading_complete);
1101         return -ENODEV;
1102 }
1103 EXPORT_SYMBOL(rtl_usb_probe);
1104
1105 void rtl_usb_disconnect(struct usb_interface *intf)
1106 {
1107         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1108         struct rtl_priv *rtlpriv = rtl_priv(hw);
1109         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1110         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1111
1112         if (unlikely(!rtlpriv))
1113                 return;
1114
1115         /* just in case driver is removed before firmware callback */
1116         wait_for_completion(&rtlpriv->firmware_loading_complete);
1117         /*ieee80211_unregister_hw will call ops_stop */
1118         if (rtlmac->mac80211_registered == 1) {
1119                 ieee80211_unregister_hw(hw);
1120                 rtlmac->mac80211_registered = 0;
1121         } else {
1122                 rtl_deinit_deferred_work(hw);
1123                 rtlpriv->intf_ops->adapter_stop(hw);
1124         }
1125         /*deinit rfkill */
1126         /* rtl_deinit_rfkill(hw); */
1127         rtl_usb_deinit(hw);
1128         rtl_deinit_core(hw);
1129         kfree(rtlpriv->usb_data);
1130         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1131         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1132         _rtl_usb_io_handler_release(hw);
1133         usb_put_dev(rtlusb->udev);
1134         usb_set_intfdata(intf, NULL);
1135         ieee80211_free_hw(hw);
1136 }
1137 EXPORT_SYMBOL(rtl_usb_disconnect);
1138
1139 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1140 {
1141         return 0;
1142 }
1143 EXPORT_SYMBOL(rtl_usb_suspend);
1144
1145 int rtl_usb_resume(struct usb_interface *pusb_intf)
1146 {
1147         return 0;
1148 }
1149 EXPORT_SYMBOL(rtl_usb_resume);