drivers/net/wireless/rtlwifi/usb.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2011  Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * wlanfae <wlanfae@realtek.com>
  23  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24  * Hsinchu 300, Taiwan.
  25  *
  26  *****************************************************************************/
  27
  28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29
  30 #include <linux/usb.h>
  31 #include "core.h"
  32 #include "wifi.h"
  33 #include "usb.h"
  34 #include "base.h"
  35 #include "ps.h"
  36
  37 #define REALTEK_USB_VENQT_READ                  0xC0
  38 #define REALTEK_USB_VENQT_WRITE                 0x40
  39 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  40 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  41
  42 #define REALTEK_USB_VENQT_MAX_BUF_SIZE          254
  43
  44 static void usbctrl_async_callback(struct urb *urb)
  45 {
  46         if (urb)
  47                 kfree(urb->context);
  48 }
  49
  50 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  51                                           u16 value, u16 index, void *pdata,
  52                                           u16 len)
  53 {
  54         int rc;
  55         unsigned int pipe;
  56         u8 reqtype;
  57         struct usb_ctrlrequest *dr;
  58         struct urb *urb;
  59         struct rtl819x_async_write_data {
  60                 u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
  61                 struct usb_ctrlrequest dr;
  62         } *buf;
  63
  64         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  65         reqtype =  REALTEK_USB_VENQT_WRITE;
  66
  67         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
  68         if (!buf)
  69                 return -ENOMEM;
  70
  71         urb = usb_alloc_urb(0, GFP_ATOMIC);
  72         if (!urb) {
  73                 kfree(buf);
  74                 return -ENOMEM;
  75         }
  76
  77         dr = &buf->dr;
  78
  79         dr->bRequestType = reqtype;
  80         dr->bRequest = request;
  81         dr->wValue = cpu_to_le16(value);
  82         dr->wIndex = cpu_to_le16(index);
  83         dr->wLength = cpu_to_le16(len);
  84         memcpy(buf, pdata, len);
  85         usb_fill_control_urb(urb, udev, pipe,
  86                              (unsigned char *)dr, buf, len,
  87                              usbctrl_async_callback, buf);
  88         rc = usb_submit_urb(urb, GFP_ATOMIC);
  89         if (rc < 0)
  90                 kfree(buf);
  91         usb_free_urb(urb);
  92         return rc;
  93 }
  94
  95 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
  96                                         u16 value, u16 index, void *pdata,
  97                                         u16 len)
  98 {
  99         unsigned int pipe;
 100         int status;
 101         u8 reqtype;
 102
 103         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 104         reqtype =  REALTEK_USB_VENQT_READ;
 105
 106         status = usb_control_msg(udev, pipe, request, reqtype, value, index,
 107                                  pdata, len, 0); /* max. timeout */
 108
 109         if (status < 0)
 110                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 111                        value, status, *(u32 *)pdata);
 112         return status;
 113 }
 114
 115 static u32 _usb_read_sync(struct usb_device *udev, u32 addr, u16 len)
 116 {
 117         u8 request;
 118         u16 wvalue;
 119         u16 index;
 120         u32 *data;
 121         u32 ret;
 122
 123         data = kmalloc(sizeof(u32), GFP_KERNEL);
 124         if (!data)
 125                 return -ENOMEM;
 126         request = REALTEK_USB_VENQT_CMD_REQ;
 127         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 128
 129         wvalue = (u16)addr;
 130         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 131         ret = *data;
 132         kfree(data);
 133         return ret;
 134 }
 135
 136 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 137 {
 138         struct device *dev = rtlpriv->io.dev;
 139
 140         return (u8)_usb_read_sync(to_usb_device(dev), addr, 1);
 141 }
 142
 143 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 144 {
 145         struct device *dev = rtlpriv->io.dev;
 146
 147         return (u16)_usb_read_sync(to_usb_device(dev), addr, 2);
 148 }
 149
 150 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 151 {
 152         struct device *dev = rtlpriv->io.dev;
 153
 154         return _usb_read_sync(to_usb_device(dev), addr, 4);
 155 }
 156
 157 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 158                              u16 len)
 159 {
 160         u8 request;
 161         u16 wvalue;
 162         u16 index;
 163         u32 data;
 164
 165         request = REALTEK_USB_VENQT_CMD_REQ;
 166         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 167         wvalue = (u16)(addr&0x0000ffff);
 168         data = val;
 169         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 170                                        len);
 171 }
 172
 173 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 174 {
 175         struct device *dev = rtlpriv->io.dev;
 176
 177         _usb_write_async(to_usb_device(dev), addr, val, 1);
 178 }
 179
 180 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 181 {
 182         struct device *dev = rtlpriv->io.dev;
 183
 184         _usb_write_async(to_usb_device(dev), addr, val, 2);
 185 }
 186
 187 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 188 {
 189         struct device *dev = rtlpriv->io.dev;
 190
 191         _usb_write_async(to_usb_device(dev), addr, val, 4);
 192 }
 193
 194 static void _rtl_usb_io_handler_init(struct device *dev,
 195                                      struct ieee80211_hw *hw)
 196 {
 197         struct rtl_priv *rtlpriv = rtl_priv(hw);
 198
 199         rtlpriv->io.dev = dev;
 200         mutex_init(&rtlpriv->io.bb_mutex);
 201         rtlpriv->io.write8_async        = _usb_write8_async;
 202         rtlpriv->io.write16_async       = _usb_write16_async;
 203         rtlpriv->io.write32_async       = _usb_write32_async;
 204         rtlpriv->io.read8_sync          = _usb_read8_sync;
 205         rtlpriv->io.read16_sync         = _usb_read16_sync;
 206         rtlpriv->io.read32_sync         = _usb_read32_sync;
 207 }
 208
 209 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 210 {
 211         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 212
 213         mutex_destroy(&rtlpriv->io.bb_mutex);
 214 }
 215
 216 /**
 217  *
 218  *      Default aggregation handler. Do nothing and just return the oldest skb.
 219  */
 220 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 221                                                   struct sk_buff_head *list)
 222 {
 223         return skb_dequeue(list);
 224 }
 225
 226 #define IS_HIGH_SPEED_USB(udev) \
 227                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 228
 229 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 230 {
 231         u32 i;
 232         struct rtl_priv *rtlpriv = rtl_priv(hw);
 233         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 234
 235         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 236                                                     ? USB_HIGH_SPEED_BULK_SIZE
 237                                                     : USB_FULL_SPEED_BULK_SIZE;
 238
 239         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("USB Max Bulk-out Size=%d\n",
 240                  rtlusb->max_bulk_out_size));
 241
 242         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 243                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 244                 if (!ep_num) {
 245                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 246                                  ("Invalid endpoint map setting!\n"));
 247                         return -EINVAL;
 248                 }
 249         }
 250
 251         rtlusb->usb_tx_post_hdl =
 252                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 253         rtlusb->usb_tx_cleanup  =
 254                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 255         rtlusb->usb_tx_aggregate_hdl =
 256                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 257                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 258                  : &_none_usb_tx_aggregate_hdl;
 259
 260         init_usb_anchor(&rtlusb->tx_submitted);
 261         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 262                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 263                 init_usb_anchor(&rtlusb->tx_pending[i]);
 264         }
 265         return 0;
 266 }
 267
 268 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 269 {
 270         struct rtl_priv *rtlpriv = rtl_priv(hw);
 271         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 272         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 273
 274         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 275         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 276         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 277         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 278         rtlusb->usb_rx_segregate_hdl =
 279                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 280
 281         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 282                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 283         init_usb_anchor(&rtlusb->rx_submitted);
 284         return 0;
 285 }
 286
 287 static int _rtl_usb_init(struct ieee80211_hw *hw)
 288 {
 289         struct rtl_priv *rtlpriv = rtl_priv(hw);
 290         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 291         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 292         int err;
 293         u8 epidx;
 294         struct usb_interface    *usb_intf = rtlusb->intf;
 295         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 296
 297         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 298         for (epidx = 0; epidx < epnums; epidx++) {
 299                 struct usb_endpoint_descriptor *pep_desc;
 300                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 301
 302                 if (usb_endpoint_dir_in(pep_desc))
 303                         rtlusb->in_ep_nums++;
 304                 else if (usb_endpoint_dir_out(pep_desc))
 305                         rtlusb->out_ep_nums++;
 306
 307                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 308                          ("USB EP(0x%02x), MaxPacketSize=%d ,Interval=%d.\n",
 309                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 310                          pep_desc->bInterval));
 311         }
 312         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num)
 313                 return -EINVAL ;
 314
 315         /* usb endpoint mapping */
 316         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 317         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 318         _rtl_usb_init_tx(hw);
 319         _rtl_usb_init_rx(hw);
 320         return err;
 321 }
 322
 323 static int _rtl_usb_init_sw(struct ieee80211_hw *hw)
 324 {
 325         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 326         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 327         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 328         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 329
 330         rtlhal->hw = hw;
 331         ppsc->inactiveps = false;
 332         ppsc->leisure_ps = false;
 333         ppsc->fwctrl_lps = false;
 334         ppsc->reg_fwctrl_lps = 3;
 335         ppsc->reg_max_lps_awakeintvl = 5;
 336         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 337
 338          /* IBSS */
 339         mac->beacon_interval = 100;
 340
 341          /* AMPDU */
 342         mac->min_space_cfg = 0;
 343         mac->max_mss_density = 0;
 344
 345         /* set sane AMPDU defaults */
 346         mac->current_ampdu_density = 7;
 347         mac->current_ampdu_factor = 3;
 348
 349         /* QOS */
 350         rtlusb->acm_method = eAcmWay2_SW;
 351
 352         /* IRQ */
 353         /* HIMR - turn all on */
 354         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 355         /* HIMR_EX - turn all on */
 356         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 357         rtlusb->disableHWSM =  true;
 358         return 0;
 359 }
 360
 361 #define __RADIO_TAP_SIZE_RSV    32
 362
 363 static void _rtl_rx_completed(struct urb *urb);
 364
 365 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
 366                                         struct rtl_usb *rtlusb,
 367                                         struct urb *urb,
 368                                         gfp_t gfp_mask)
 369 {
 370         struct sk_buff *skb;
 371         struct rtl_priv *rtlpriv = rtl_priv(hw);
 372
 373         skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
 374                                gfp_mask);
 375         if (!skb) {
 376                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 377                          ("Failed to __dev_alloc_skb!!\n"))
 378                 return ERR_PTR(-ENOMEM);
 379         }
 380
 381         /* reserve some space for mac80211's radiotap */
 382         skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 383         usb_fill_bulk_urb(urb, rtlusb->udev,
 384                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 385                           skb->data, min(skb_tailroom(skb),
 386                           (int)rtlusb->rx_max_size),
 387                           _rtl_rx_completed, skb);
 388
 389         _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 390         return skb;
 391 }
 392
 393 #undef __RADIO_TAP_SIZE_RSV
 394
 395 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 396                                     struct sk_buff *skb)
 397 {
 398         struct rtl_priv *rtlpriv = rtl_priv(hw);
 399         u8 *rxdesc = skb->data;
 400         struct ieee80211_hdr *hdr;
 401         bool unicast = false;
 402         __le16 fc;
 403         struct ieee80211_rx_status rx_status = {0};
 404         struct rtl_stats stats = {
 405                 .signal = 0,
 406                 .noise = -98,
 407                 .rate = 0,
 408         };
 409
 410         skb_pull(skb, RTL_RX_DESC_SIZE);
 411         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 412         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 413         hdr = (struct ieee80211_hdr *)(skb->data);
 414         fc = hdr->frame_control;
 415         if (!stats.crc) {
 416                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 417
 418                 if (is_broadcast_ether_addr(hdr->addr1)) {
 419                         /*TODO*/;
 420                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 421                         /*TODO*/
 422                 } else {
 423                         unicast = true;
 424                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 425                 }
 426
 427                 rtl_is_special_data(hw, skb, false);
 428
 429                 if (ieee80211_is_data(fc)) {
 430                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 431
 432                         if (unicast)
 433                                 rtlpriv->link_info.num_rx_inperiod++;
 434                 }
 435         }
 436 }
 437
 438 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 439                                       struct sk_buff *skb)
 440 {
 441         struct rtl_priv *rtlpriv = rtl_priv(hw);
 442         u8 *rxdesc = skb->data;
 443         struct ieee80211_hdr *hdr;
 444         bool unicast = false;
 445         __le16 fc;
 446         struct ieee80211_rx_status rx_status = {0};
 447         struct rtl_stats stats = {
 448                 .signal = 0,
 449                 .noise = -98,
 450                 .rate = 0,
 451         };
 452
 453         skb_pull(skb, RTL_RX_DESC_SIZE);
 454         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 455         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 456         hdr = (struct ieee80211_hdr *)(skb->data);
 457         fc = hdr->frame_control;
 458         if (!stats.crc) {
 459                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 460
 461                 if (is_broadcast_ether_addr(hdr->addr1)) {
 462                         /*TODO*/;
 463                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 464                         /*TODO*/
 465                 } else {
 466                         unicast = true;
 467                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 468                 }
 469
 470                 rtl_is_special_data(hw, skb, false);
 471
 472                 if (ieee80211_is_data(fc)) {
 473                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 474
 475                         if (unicast)
 476                                 rtlpriv->link_info.num_rx_inperiod++;
 477                 }
 478                 if (likely(rtl_action_proc(hw, skb, false))) {
 479                         struct sk_buff *uskb = NULL;
 480                         u8 *pdata;
 481
 482                         uskb = dev_alloc_skb(skb->len + 128);
 483                         memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 484                                sizeof(rx_status));
 485                         pdata = (u8 *)skb_put(uskb, skb->len);
 486                         memcpy(pdata, skb->data, skb->len);
 487                         dev_kfree_skb_any(skb);
 488                         ieee80211_rx_irqsafe(hw, uskb);
 489                 } else {
 490                         dev_kfree_skb_any(skb);
 491                 }
 492         }
 493 }
 494
 495 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 496 {
 497         struct sk_buff *_skb;
 498         struct sk_buff_head rx_queue;
 499         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 500
 501         skb_queue_head_init(&rx_queue);
 502         if (rtlusb->usb_rx_segregate_hdl)
 503                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 504         WARN_ON(skb_queue_empty(&rx_queue));
 505         while (!skb_queue_empty(&rx_queue)) {
 506                 _skb = skb_dequeue(&rx_queue);
 507                 _rtl_usb_rx_process_agg(hw, skb);
 508                 ieee80211_rx_irqsafe(hw, skb);
 509         }
 510 }
 511
 512 static void _rtl_rx_completed(struct urb *_urb)
 513 {
 514         struct sk_buff *skb = (struct sk_buff *)_urb->context;
 515         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 516         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 517         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 518         struct rtl_priv *rtlpriv = rtl_priv(hw);
 519         int err = 0;
 520
 521         if (unlikely(IS_USB_STOP(rtlusb)))
 522                 goto free;
 523
 524         if (likely(0 == _urb->status)) {
 525                 /* If this code were moved to work queue, would CPU
 526                  * utilization be improved?  NOTE: We shall allocate another skb
 527                  * and reuse the original one.
 528                  */
 529                 skb_put(skb, _urb->actual_length);
 530
 531                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 532                         struct sk_buff *_skb;
 533                         _rtl_usb_rx_process_noagg(hw, skb);
 534                         _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
 535                         if (IS_ERR(_skb)) {
 536                                 err = PTR_ERR(_skb);
 537                                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 538                                         ("Can't allocate skb for bulk IN!\n"));
 539                                 return;
 540                         }
 541                         skb = _skb;
 542                 } else{
 543                         /* TO DO */
 544                         _rtl_rx_pre_process(hw, skb);
 545                         pr_err("rx agg not supported\n");
 546                 }
 547                 goto resubmit;
 548         }
 549
 550         switch (_urb->status) {
 551         /* disconnect */
 552         case -ENOENT:
 553         case -ECONNRESET:
 554         case -ENODEV:
 555         case -ESHUTDOWN:
 556                 goto free;
 557         default:
 558                 break;
 559         }
 560
 561 resubmit:
 562         skb_reset_tail_pointer(skb);
 563         skb_trim(skb, 0);
 564
 565         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 566         err = usb_submit_urb(_urb, GFP_ATOMIC);
 567         if (unlikely(err)) {
 568                 usb_unanchor_urb(_urb);
 569                 goto free;
 570         }
 571         return;
 572
 573 free:
 574         dev_kfree_skb_irq(skb);
 575 }
 576
 577 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 578 {
 579         struct urb *urb;
 580         struct sk_buff *skb;
 581         int err;
 582         int i;
 583         struct rtl_priv *rtlpriv = rtl_priv(hw);
 584         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 585
 586         WARN_ON(0 == rtlusb->rx_urb_num);
 587         /* 1600 == 1514 + max WLAN header + rtk info */
 588         WARN_ON(rtlusb->rx_max_size < 1600);
 589
 590         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 591                 err = -ENOMEM;
 592                 urb = usb_alloc_urb(0, GFP_KERNEL);
 593                 if (!urb) {
 594                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 595                                  ("Failed to alloc URB!!\n"))
 596                         goto err_out;
 597                 }
 598
 599                 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 600                 if (IS_ERR(skb)) {
 601                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 602                                  ("Failed to prep_rx_urb!!\n"))
 603                         err = PTR_ERR(skb);
 604                         goto err_out;
 605                 }
 606
 607                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 608                 err = usb_submit_urb(urb, GFP_KERNEL);
 609                 if (err)
 610                         goto err_out;
 611                 usb_free_urb(urb);
 612         }
 613         return 0;
 614
 615 err_out:
 616         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 617         return err;
 618 }
 619
 620 static int rtl_usb_start(struct ieee80211_hw *hw)
 621 {
 622         int err;
 623         struct rtl_priv *rtlpriv = rtl_priv(hw);
 624         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 625         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 626
 627         err = rtlpriv->cfg->ops->hw_init(hw);
 628         rtl_init_rx_config(hw);
 629
 630         /* Enable software */
 631         SET_USB_START(rtlusb);
 632         /* should after adapter start and interrupt enable. */
 633         set_hal_start(rtlhal);
 634
 635         /* Start bulk IN */
 636         _rtl_usb_receive(hw);
 637
 638         return err;
 639 }
 640 /**
 641  *
 642  *
 643  */
 644
 645 /*=======================  tx =========================================*/
 646 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 647 {
 648         u32 i;
 649         struct sk_buff *_skb;
 650         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 651         struct ieee80211_tx_info *txinfo;
 652
 653         SET_USB_STOP(rtlusb);
 654
 655         /* clean up rx stuff. */
 656         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 657
 658         /* clean up tx stuff */
 659         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 660                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 661                         rtlusb->usb_tx_cleanup(hw, _skb);
 662                         txinfo = IEEE80211_SKB_CB(_skb);
 663                         ieee80211_tx_info_clear_status(txinfo);
 664                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 665                         ieee80211_tx_status_irqsafe(hw, _skb);
 666                 }
 667                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 668         }
 669         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 670 }
 671
 672 /**
 673  *
 674  * We may add some struct into struct rtl_usb later. Do deinit here.
 675  *
 676  */
 677 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 678 {
 679         rtl_usb_cleanup(hw);
 680 }
 681
 682 static void rtl_usb_stop(struct ieee80211_hw *hw)
 683 {
 684         struct rtl_priv *rtlpriv = rtl_priv(hw);
 685         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 686         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 687
 688         /* should after adapter start and interrupt enable. */
 689         set_hal_stop(rtlhal);
 690         /* Enable software */
 691         SET_USB_STOP(rtlusb);
 692         rtl_usb_deinit(hw);
 693         rtlpriv->cfg->ops->hw_disable(hw);
 694 }
 695
 696 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 697 {
 698         int err;
 699         struct rtl_priv *rtlpriv = rtl_priv(hw);
 700         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 701
 702         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 703         err = usb_submit_urb(_urb, GFP_ATOMIC);
 704         if (err < 0) {
 705                 struct sk_buff *skb;
 706
 707                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 708                          ("Failed to submit urb.\n"));
 709                 usb_unanchor_urb(_urb);
 710                 skb = (struct sk_buff *)_urb->context;
 711                 kfree_skb(skb);
 712         }
 713         usb_free_urb(_urb);
 714 }
 715
 716 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 717                         struct sk_buff *skb)
 718 {
 719         struct rtl_priv *rtlpriv = rtl_priv(hw);
 720         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 721         struct ieee80211_tx_info *txinfo;
 722
 723         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 724         skb_pull(skb, RTL_TX_HEADER_SIZE);
 725         txinfo = IEEE80211_SKB_CB(skb);
 726         ieee80211_tx_info_clear_status(txinfo);
 727         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 728
 729         if (urb->status) {
 730                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 731                          ("Urb has error status 0x%X\n", urb->status));
 732                 goto out;
 733         }
 734         /*  TODO:       statistics */
 735 out:
 736         ieee80211_tx_status_irqsafe(hw, skb);
 737         return urb->status;
 738 }
 739
 740 static void _rtl_tx_complete(struct urb *urb)
 741 {
 742         struct sk_buff *skb = (struct sk_buff *)urb->context;
 743         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 744         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 745         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 746         int err;
 747
 748         if (unlikely(IS_USB_STOP(rtlusb)))
 749                 return;
 750         err = _usb_tx_post(hw, urb, skb);
 751         if (err) {
 752                 /* Ignore error and keep issuiing other urbs */
 753                 return;
 754         }
 755 }
 756
 757 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 758                                 struct sk_buff *skb, u32 ep_num)
 759 {
 760         struct rtl_priv *rtlpriv = rtl_priv(hw);
 761         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 762         struct urb *_urb;
 763
 764         WARN_ON(NULL == skb);
 765         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 766         if (!_urb) {
 767                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 768                          ("Can't allocate URB for bulk out!\n"));
 769                 kfree_skb(skb);
 770                 return NULL;
 771         }
 772         _rtl_install_trx_info(rtlusb, skb, ep_num);
 773         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 774                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 775         _urb->transfer_flags |= URB_ZERO_PACKET;
 776         return _urb;
 777 }
 778
 779 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 780                        enum rtl_txq qnum)
 781 {
 782         struct rtl_priv *rtlpriv = rtl_priv(hw);
 783         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 784         u32 ep_num;
 785         struct urb *_urb = NULL;
 786         struct sk_buff *_skb = NULL;
 787         struct sk_buff_head *skb_list;
 788         struct usb_anchor *urb_list;
 789
 790         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 791         if (unlikely(IS_USB_STOP(rtlusb))) {
 792                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 793                          ("USB device is stopping...\n"));
 794                 kfree_skb(skb);
 795                 return;
 796         }
 797         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 798         skb_list = &rtlusb->tx_skb_queue[ep_num];
 799         _skb = skb;
 800         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 801         if (unlikely(!_urb)) {
 802                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 803                          ("Can't allocate urb. Drop skb!\n"));
 804                 return;
 805         }
 806         urb_list = &rtlusb->tx_pending[ep_num];
 807         _rtl_submit_tx_urb(hw, _urb);
 808 }
 809
 810 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
 811                             u16 hw_queue)
 812 {
 813         struct rtl_priv *rtlpriv = rtl_priv(hw);
 814         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 815         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 816         struct rtl_tx_desc *pdesc = NULL;
 817         struct rtl_tcb_desc tcb_desc;
 818         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 819         __le16 fc = hdr->frame_control;
 820         u8 *pda_addr = hdr->addr1;
 821         /* ssn */
 822         u8 *qc = NULL;
 823         u8 tid = 0;
 824         u16 seq_number = 0;
 825
 826         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 827         if (ieee80211_is_auth(fc)) {
 828                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 829                 rtl_ips_nic_on(hw);
 830         }
 831
 832         if (rtlpriv->psc.sw_ps_enabled) {
 833                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 834                     !ieee80211_has_pm(fc))
 835                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 836         }
 837
 838         rtl_action_proc(hw, skb, true);
 839         if (is_multicast_ether_addr(pda_addr))
 840                 rtlpriv->stats.txbytesmulticast += skb->len;
 841         else if (is_broadcast_ether_addr(pda_addr))
 842                 rtlpriv->stats.txbytesbroadcast += skb->len;
 843         else
 844                 rtlpriv->stats.txbytesunicast += skb->len;
 845         if (ieee80211_is_data_qos(fc)) {
 846                 qc = ieee80211_get_qos_ctl(hdr);
 847                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 848                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 849                              IEEE80211_SCTL_SEQ) >> 4;
 850                 seq_number += 1;
 851                 seq_number <<= 4;
 852         }
 853         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
 854                                         hw_queue, &tcb_desc);
 855         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 856                 if (qc)
 857                         mac->tids[tid].seq_number = seq_number;
 858         }
 859         if (ieee80211_is_data(fc))
 860                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 861 }
 862
 863 static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 864                       struct rtl_tcb_desc *dummy)
 865 {
 866         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 867         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 868         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 869         __le16 fc = hdr->frame_control;
 870         u16 hw_queue;
 871
 872         if (unlikely(is_hal_stop(rtlhal)))
 873                 goto err_free;
 874         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 875         _rtl_usb_tx_preprocess(hw, skb, hw_queue);
 876         _rtl_usb_transmit(hw, skb, hw_queue);
 877         return NETDEV_TX_OK;
 878
 879 err_free:
 880         dev_kfree_skb_any(skb);
 881         return NETDEV_TX_OK;
 882 }
 883
 884 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 885                                         struct sk_buff *skb)
 886 {
 887         return false;
 888 }
 889
 890 static struct rtl_intf_ops rtl_usb_ops = {
 891         .adapter_start = rtl_usb_start,
 892         .adapter_stop = rtl_usb_stop,
 893         .adapter_tx = rtl_usb_tx,
 894         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 895 };
 896
 897 int __devinit rtl_usb_probe(struct usb_interface *intf,
 898                         const struct usb_device_id *id)
 899 {
 900         int err;
 901         struct ieee80211_hw *hw = NULL;
 902         struct rtl_priv *rtlpriv = NULL;
 903         struct usb_device       *udev;
 904         struct rtl_usb_priv *usb_priv;
 905
 906         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 907                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 908         if (!hw) {
 909                 RT_ASSERT(false, ("%s : ieee80211 alloc failed\n", __func__));
 910                 return -ENOMEM;
 911         }
 912         rtlpriv = hw->priv;
 913         SET_IEEE80211_DEV(hw, &intf->dev);
 914         udev = interface_to_usbdev(intf);
 915         usb_get_dev(udev);
 916         usb_priv = rtl_usbpriv(hw);
 917         memset(usb_priv, 0, sizeof(*usb_priv));
 918         usb_priv->dev.intf = intf;
 919         usb_priv->dev.udev = udev;
 920         usb_set_intfdata(intf, hw);
 921         /* init cfg & intf_ops */
 922         rtlpriv->rtlhal.interface = INTF_USB;
 923         rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
 924         rtlpriv->intf_ops = &rtl_usb_ops;
 925         rtl_dbgp_flag_init(hw);
 926         /* Init IO handler */
 927         _rtl_usb_io_handler_init(&udev->dev, hw);
 928         rtlpriv->cfg->ops->read_chip_version(hw);
 929         /*like read eeprom and so on */
 930         rtlpriv->cfg->ops->read_eeprom_info(hw);
 931         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
 932                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 933                          ("Can't init_sw_vars.\n"));
 934                 goto error_out;
 935         }
 936         rtlpriv->cfg->ops->init_sw_leds(hw);
 937         err = _rtl_usb_init(hw);
 938         err = _rtl_usb_init_sw(hw);
 939         /* Init mac80211 sw */
 940         err = rtl_init_core(hw);
 941         if (err) {
 942                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 943                          ("Can't allocate sw for mac80211.\n"));
 944                 goto error_out;
 945         }
 946
 947         /*init rfkill */
 948         /* rtl_init_rfkill(hw); */
 949
 950         err = ieee80211_register_hw(hw);
 951         if (err) {
 952                 RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG,
 953                          ("Can't register mac80211 hw.\n"));
 954                 goto error_out;
 955         } else {
 956                 rtlpriv->mac80211.mac80211_registered = 1;
 957         }
 958         set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
 959         return 0;
 960 error_out:
 961         rtl_deinit_core(hw);
 962         _rtl_usb_io_handler_release(hw);
 963         ieee80211_free_hw(hw);
 964         usb_put_dev(udev);
 965         return -ENODEV;
 966 }
 967 EXPORT_SYMBOL(rtl_usb_probe);
 968
 969 void rtl_usb_disconnect(struct usb_interface *intf)
 970 {
 971         struct ieee80211_hw *hw = usb_get_intfdata(intf);
 972         struct rtl_priv *rtlpriv = rtl_priv(hw);
 973         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 974         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 975
 976         if (unlikely(!rtlpriv))
 977                 return;
 978         /*ieee80211_unregister_hw will call ops_stop */
 979         if (rtlmac->mac80211_registered == 1) {
 980                 ieee80211_unregister_hw(hw);
 981                 rtlmac->mac80211_registered = 0;
 982         } else {
 983                 rtl_deinit_deferred_work(hw);
 984                 rtlpriv->intf_ops->adapter_stop(hw);
 985         }
 986         /*deinit rfkill */
 987         /* rtl_deinit_rfkill(hw); */
 988         rtl_usb_deinit(hw);
 989         rtl_deinit_core(hw);
 990         rtlpriv->cfg->ops->deinit_sw_leds(hw);
 991         rtlpriv->cfg->ops->deinit_sw_vars(hw);
 992         _rtl_usb_io_handler_release(hw);
 993         usb_put_dev(rtlusb->udev);
 994         usb_set_intfdata(intf, NULL);
 995         ieee80211_free_hw(hw);
 996 }
 997 EXPORT_SYMBOL(rtl_usb_disconnect);
 998
 999 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1000 {
1001         return 0;
1002 }
1003 EXPORT_SYMBOL(rtl_usb_suspend);
1004
1005 int rtl_usb_resume(struct usb_interface *pusb_intf)
1006 {
1007         return 0;
1008 }
1009 EXPORT_SYMBOL(rtl_usb_resume);