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 #include "rtl8192c/fw_common.h"
  37
  38 #define REALTEK_USB_VENQT_READ                  0xC0
  39 #define REALTEK_USB_VENQT_WRITE                 0x40
  40 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  41 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  42
  43 #define REALTEK_USB_VENQT_MAX_BUF_SIZE          254
  44 #define MAX_USBCTRL_VENDORREQ_TIMES             10
  45
  46 static void usbctrl_async_callback(struct urb *urb)
  47 {
  48         if (urb)
  49                 kfree(urb->context);
  50 }
  51
  52 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  53                                           u16 value, u16 index, void *pdata,
  54                                           u16 len)
  55 {
  56         int rc;
  57         unsigned int pipe;
  58         u8 reqtype;
  59         struct usb_ctrlrequest *dr;
  60         struct urb *urb;
  61         struct rtl819x_async_write_data {
  62                 u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
  63                 struct usb_ctrlrequest dr;
  64         } *buf;
  65
  66         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  67         reqtype =  REALTEK_USB_VENQT_WRITE;
  68
  69         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
  70         if (!buf)
  71                 return -ENOMEM;
  72
  73         urb = usb_alloc_urb(0, GFP_ATOMIC);
  74         if (!urb) {
  75                 kfree(buf);
  76                 return -ENOMEM;
  77         }
  78
  79         dr = &buf->dr;
  80
  81         dr->bRequestType = reqtype;
  82         dr->bRequest = request;
  83         dr->wValue = cpu_to_le16(value);
  84         dr->wIndex = cpu_to_le16(index);
  85         dr->wLength = cpu_to_le16(len);
  86         memcpy(buf, pdata, len);
  87         usb_fill_control_urb(urb, udev, pipe,
  88                              (unsigned char *)dr, buf, len,
  89                              usbctrl_async_callback, buf);
  90         rc = usb_submit_urb(urb, GFP_ATOMIC);
  91         if (rc < 0)
  92                 kfree(buf);
  93         usb_free_urb(urb);
  94         return rc;
  95 }
  96
  97 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
  98                                         u16 value, u16 index, void *pdata,
  99                                         u16 len)
 100 {
 101         unsigned int pipe;
 102         int status;
 103         u8 reqtype;
 104         int vendorreq_times = 0;
 105
 106         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 107         reqtype =  REALTEK_USB_VENQT_READ;
 108
 109         while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
 110                 status = usb_control_msg(udev, pipe, request, reqtype, value,
 111                                          index, pdata, len, 0); /*max. timeout*/
 112                 if (status < 0) {
 113                         /* firmware download is checksumed, don't retry */
 114                         if ((value >= FW_8192C_START_ADDRESS &&
 115                             value <= FW_8192C_END_ADDRESS))
 116                                 break;
 117                 } else {
 118                         break;
 119                 }
 120         }
 121         if (status < 0)
 122                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 123                        value, status, *(u32 *)pdata);
 124         return status;
 125 }
 126
 127 static u32 _usb_read_sync(struct usb_device *udev, u32 addr, u16 len)
 128 {
 129         u8 request;
 130         u16 wvalue;
 131         u16 index;
 132         u32 *data;
 133         u32 ret;
 134
 135         data = kmalloc(sizeof(u32), GFP_KERNEL);
 136         if (!data)
 137                 return -ENOMEM;
 138         request = REALTEK_USB_VENQT_CMD_REQ;
 139         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 140
 141         wvalue = (u16)addr;
 142         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 143         ret = *data;
 144         kfree(data);
 145         return ret;
 146 }
 147
 148 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 149 {
 150         struct device *dev = rtlpriv->io.dev;
 151
 152         return (u8)_usb_read_sync(to_usb_device(dev), addr, 1);
 153 }
 154
 155 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 156 {
 157         struct device *dev = rtlpriv->io.dev;
 158
 159         return (u16)_usb_read_sync(to_usb_device(dev), addr, 2);
 160 }
 161
 162 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 163 {
 164         struct device *dev = rtlpriv->io.dev;
 165
 166         return _usb_read_sync(to_usb_device(dev), addr, 4);
 167 }
 168
 169 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 170                              u16 len)
 171 {
 172         u8 request;
 173         u16 wvalue;
 174         u16 index;
 175         u32 data;
 176
 177         request = REALTEK_USB_VENQT_CMD_REQ;
 178         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 179         wvalue = (u16)(addr&0x0000ffff);
 180         data = val;
 181         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 182                                        len);
 183 }
 184
 185 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 186 {
 187         struct device *dev = rtlpriv->io.dev;
 188
 189         _usb_write_async(to_usb_device(dev), addr, val, 1);
 190 }
 191
 192 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 193 {
 194         struct device *dev = rtlpriv->io.dev;
 195
 196         _usb_write_async(to_usb_device(dev), addr, val, 2);
 197 }
 198
 199 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 200 {
 201         struct device *dev = rtlpriv->io.dev;
 202
 203         _usb_write_async(to_usb_device(dev), addr, val, 4);
 204 }
 205
 206 static void _rtl_usb_io_handler_init(struct device *dev,
 207                                      struct ieee80211_hw *hw)
 208 {
 209         struct rtl_priv *rtlpriv = rtl_priv(hw);
 210
 211         rtlpriv->io.dev = dev;
 212         mutex_init(&rtlpriv->io.bb_mutex);
 213         rtlpriv->io.write8_async        = _usb_write8_async;
 214         rtlpriv->io.write16_async       = _usb_write16_async;
 215         rtlpriv->io.write32_async       = _usb_write32_async;
 216         rtlpriv->io.read8_sync          = _usb_read8_sync;
 217         rtlpriv->io.read16_sync         = _usb_read16_sync;
 218         rtlpriv->io.read32_sync         = _usb_read32_sync;
 219 }
 220
 221 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 222 {
 223         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 224
 225         mutex_destroy(&rtlpriv->io.bb_mutex);
 226 }
 227
 228 /**
 229  *
 230  *      Default aggregation handler. Do nothing and just return the oldest skb.
 231  */
 232 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 233                                                   struct sk_buff_head *list)
 234 {
 235         return skb_dequeue(list);
 236 }
 237
 238 #define IS_HIGH_SPEED_USB(udev) \
 239                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 240
 241 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 242 {
 243         u32 i;
 244         struct rtl_priv *rtlpriv = rtl_priv(hw);
 245         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 246
 247         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 248                                                     ? USB_HIGH_SPEED_BULK_SIZE
 249                                                     : USB_FULL_SPEED_BULK_SIZE;
 250
 251         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("USB Max Bulk-out Size=%d\n",
 252                  rtlusb->max_bulk_out_size));
 253
 254         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 255                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 256                 if (!ep_num) {
 257                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 258                                  ("Invalid endpoint map setting!\n"));
 259                         return -EINVAL;
 260                 }
 261         }
 262
 263         rtlusb->usb_tx_post_hdl =
 264                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 265         rtlusb->usb_tx_cleanup  =
 266                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 267         rtlusb->usb_tx_aggregate_hdl =
 268                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 269                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 270                  : &_none_usb_tx_aggregate_hdl;
 271
 272         init_usb_anchor(&rtlusb->tx_submitted);
 273         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 274                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 275                 init_usb_anchor(&rtlusb->tx_pending[i]);
 276         }
 277         return 0;
 278 }
 279
 280 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 281 {
 282         struct rtl_priv *rtlpriv = rtl_priv(hw);
 283         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 284         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 285
 286         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 287         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 288         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 289         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 290         rtlusb->usb_rx_segregate_hdl =
 291                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 292
 293         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 294                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 295         init_usb_anchor(&rtlusb->rx_submitted);
 296         return 0;
 297 }
 298
 299 static int _rtl_usb_init(struct ieee80211_hw *hw)
 300 {
 301         struct rtl_priv *rtlpriv = rtl_priv(hw);
 302         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 303         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 304         int err;
 305         u8 epidx;
 306         struct usb_interface    *usb_intf = rtlusb->intf;
 307         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 308
 309         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 310         for (epidx = 0; epidx < epnums; epidx++) {
 311                 struct usb_endpoint_descriptor *pep_desc;
 312                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 313
 314                 if (usb_endpoint_dir_in(pep_desc))
 315                         rtlusb->in_ep_nums++;
 316                 else if (usb_endpoint_dir_out(pep_desc))
 317                         rtlusb->out_ep_nums++;
 318
 319                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 320                          ("USB EP(0x%02x), MaxPacketSize=%d ,Interval=%d.\n",
 321                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 322                          pep_desc->bInterval));
 323         }
 324         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num)
 325                 return -EINVAL ;
 326
 327         /* usb endpoint mapping */
 328         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 329         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 330         _rtl_usb_init_tx(hw);
 331         _rtl_usb_init_rx(hw);
 332         return err;
 333 }
 334
 335 static int _rtl_usb_init_sw(struct ieee80211_hw *hw)
 336 {
 337         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 338         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 339         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 340         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 341
 342         rtlhal->hw = hw;
 343         ppsc->inactiveps = false;
 344         ppsc->leisure_ps = false;
 345         ppsc->fwctrl_lps = false;
 346         ppsc->reg_fwctrl_lps = 3;
 347         ppsc->reg_max_lps_awakeintvl = 5;
 348         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 349
 350          /* IBSS */
 351         mac->beacon_interval = 100;
 352
 353          /* AMPDU */
 354         mac->min_space_cfg = 0;
 355         mac->max_mss_density = 0;
 356
 357         /* set sane AMPDU defaults */
 358         mac->current_ampdu_density = 7;
 359         mac->current_ampdu_factor = 3;
 360
 361         /* QOS */
 362         rtlusb->acm_method = eAcmWay2_SW;
 363
 364         /* IRQ */
 365         /* HIMR - turn all on */
 366         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 367         /* HIMR_EX - turn all on */
 368         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 369         rtlusb->disableHWSM =  true;
 370         return 0;
 371 }
 372
 373 #define __RADIO_TAP_SIZE_RSV    32
 374
 375 static void _rtl_rx_completed(struct urb *urb);
 376
 377 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
 378                                         struct rtl_usb *rtlusb,
 379                                         struct urb *urb,
 380                                         gfp_t gfp_mask)
 381 {
 382         struct sk_buff *skb;
 383         struct rtl_priv *rtlpriv = rtl_priv(hw);
 384
 385         skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
 386                                gfp_mask);
 387         if (!skb) {
 388                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 389                          ("Failed to __dev_alloc_skb!!\n"))
 390                 return ERR_PTR(-ENOMEM);
 391         }
 392
 393         /* reserve some space for mac80211's radiotap */
 394         skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 395         usb_fill_bulk_urb(urb, rtlusb->udev,
 396                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 397                           skb->data, min(skb_tailroom(skb),
 398                           (int)rtlusb->rx_max_size),
 399                           _rtl_rx_completed, skb);
 400
 401         _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 402         return skb;
 403 }
 404
 405 #undef __RADIO_TAP_SIZE_RSV
 406
 407 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 408                                     struct sk_buff *skb)
 409 {
 410         struct rtl_priv *rtlpriv = rtl_priv(hw);
 411         u8 *rxdesc = skb->data;
 412         struct ieee80211_hdr *hdr;
 413         bool unicast = false;
 414         __le16 fc;
 415         struct ieee80211_rx_status rx_status = {0};
 416         struct rtl_stats stats = {
 417                 .signal = 0,
 418                 .noise = -98,
 419                 .rate = 0,
 420         };
 421
 422         skb_pull(skb, RTL_RX_DESC_SIZE);
 423         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 424         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 425         hdr = (struct ieee80211_hdr *)(skb->data);
 426         fc = hdr->frame_control;
 427         if (!stats.crc) {
 428                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 429
 430                 if (is_broadcast_ether_addr(hdr->addr1)) {
 431                         /*TODO*/;
 432                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 433                         /*TODO*/
 434                 } else {
 435                         unicast = true;
 436                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 437                 }
 438
 439                 rtl_is_special_data(hw, skb, false);
 440
 441                 if (ieee80211_is_data(fc)) {
 442                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 443
 444                         if (unicast)
 445                                 rtlpriv->link_info.num_rx_inperiod++;
 446                 }
 447         }
 448 }
 449
 450 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 451                                       struct sk_buff *skb)
 452 {
 453         struct rtl_priv *rtlpriv = rtl_priv(hw);
 454         u8 *rxdesc = skb->data;
 455         struct ieee80211_hdr *hdr;
 456         bool unicast = false;
 457         __le16 fc;
 458         struct ieee80211_rx_status rx_status = {0};
 459         struct rtl_stats stats = {
 460                 .signal = 0,
 461                 .noise = -98,
 462                 .rate = 0,
 463         };
 464
 465         skb_pull(skb, RTL_RX_DESC_SIZE);
 466         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 467         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 468         hdr = (struct ieee80211_hdr *)(skb->data);
 469         fc = hdr->frame_control;
 470         if (!stats.crc) {
 471                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 472
 473                 if (is_broadcast_ether_addr(hdr->addr1)) {
 474                         /*TODO*/;
 475                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 476                         /*TODO*/
 477                 } else {
 478                         unicast = true;
 479                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 480                 }
 481
 482                 rtl_is_special_data(hw, skb, false);
 483
 484                 if (ieee80211_is_data(fc)) {
 485                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 486
 487                         if (unicast)
 488                                 rtlpriv->link_info.num_rx_inperiod++;
 489                 }
 490                 if (likely(rtl_action_proc(hw, skb, false))) {
 491                         struct sk_buff *uskb = NULL;
 492                         u8 *pdata;
 493
 494                         uskb = dev_alloc_skb(skb->len + 128);
 495                         memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 496                                sizeof(rx_status));
 497                         pdata = (u8 *)skb_put(uskb, skb->len);
 498                         memcpy(pdata, skb->data, skb->len);
 499                         dev_kfree_skb_any(skb);
 500                         ieee80211_rx_irqsafe(hw, uskb);
 501                 } else {
 502                         dev_kfree_skb_any(skb);
 503                 }
 504         }
 505 }
 506
 507 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 508 {
 509         struct sk_buff *_skb;
 510         struct sk_buff_head rx_queue;
 511         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 512
 513         skb_queue_head_init(&rx_queue);
 514         if (rtlusb->usb_rx_segregate_hdl)
 515                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 516         WARN_ON(skb_queue_empty(&rx_queue));
 517         while (!skb_queue_empty(&rx_queue)) {
 518                 _skb = skb_dequeue(&rx_queue);
 519                 _rtl_usb_rx_process_agg(hw, skb);
 520                 ieee80211_rx_irqsafe(hw, skb);
 521         }
 522 }
 523
 524 static void _rtl_rx_completed(struct urb *_urb)
 525 {
 526         struct sk_buff *skb = (struct sk_buff *)_urb->context;
 527         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 528         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 529         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 530         struct rtl_priv *rtlpriv = rtl_priv(hw);
 531         int err = 0;
 532
 533         if (unlikely(IS_USB_STOP(rtlusb)))
 534                 goto free;
 535
 536         if (likely(0 == _urb->status)) {
 537                 /* If this code were moved to work queue, would CPU
 538                  * utilization be improved?  NOTE: We shall allocate another skb
 539                  * and reuse the original one.
 540                  */
 541                 skb_put(skb, _urb->actual_length);
 542
 543                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 544                         struct sk_buff *_skb;
 545                         _rtl_usb_rx_process_noagg(hw, skb);
 546                         _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
 547                         if (IS_ERR(_skb)) {
 548                                 err = PTR_ERR(_skb);
 549                                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 550                                         ("Can't allocate skb for bulk IN!\n"));
 551                                 return;
 552                         }
 553                         skb = _skb;
 554                 } else{
 555                         /* TO DO */
 556                         _rtl_rx_pre_process(hw, skb);
 557                         pr_err("rx agg not supported\n");
 558                 }
 559                 goto resubmit;
 560         }
 561
 562         switch (_urb->status) {
 563         /* disconnect */
 564         case -ENOENT:
 565         case -ECONNRESET:
 566         case -ENODEV:
 567         case -ESHUTDOWN:
 568                 goto free;
 569         default:
 570                 break;
 571         }
 572
 573 resubmit:
 574         skb_reset_tail_pointer(skb);
 575         skb_trim(skb, 0);
 576
 577         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 578         err = usb_submit_urb(_urb, GFP_ATOMIC);
 579         if (unlikely(err)) {
 580                 usb_unanchor_urb(_urb);
 581                 goto free;
 582         }
 583         return;
 584
 585 free:
 586         dev_kfree_skb_irq(skb);
 587 }
 588
 589 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 590 {
 591         struct urb *urb;
 592         struct sk_buff *skb;
 593         int err;
 594         int i;
 595         struct rtl_priv *rtlpriv = rtl_priv(hw);
 596         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 597
 598         WARN_ON(0 == rtlusb->rx_urb_num);
 599         /* 1600 == 1514 + max WLAN header + rtk info */
 600         WARN_ON(rtlusb->rx_max_size < 1600);
 601
 602         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 603                 err = -ENOMEM;
 604                 urb = usb_alloc_urb(0, GFP_KERNEL);
 605                 if (!urb) {
 606                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 607                                  ("Failed to alloc URB!!\n"))
 608                         goto err_out;
 609                 }
 610
 611                 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 612                 if (IS_ERR(skb)) {
 613                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 614                                  ("Failed to prep_rx_urb!!\n"))
 615                         err = PTR_ERR(skb);
 616                         goto err_out;
 617                 }
 618
 619                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 620                 err = usb_submit_urb(urb, GFP_KERNEL);
 621                 if (err)
 622                         goto err_out;
 623                 usb_free_urb(urb);
 624         }
 625         return 0;
 626
 627 err_out:
 628         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 629         return err;
 630 }
 631
 632 static int rtl_usb_start(struct ieee80211_hw *hw)
 633 {
 634         int err;
 635         struct rtl_priv *rtlpriv = rtl_priv(hw);
 636         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 637         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 638
 639         err = rtlpriv->cfg->ops->hw_init(hw);
 640         rtl_init_rx_config(hw);
 641
 642         /* Enable software */
 643         SET_USB_START(rtlusb);
 644         /* should after adapter start and interrupt enable. */
 645         set_hal_start(rtlhal);
 646
 647         /* Start bulk IN */
 648         _rtl_usb_receive(hw);
 649
 650         return err;
 651 }
 652 /**
 653  *
 654  *
 655  */
 656
 657 /*=======================  tx =========================================*/
 658 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 659 {
 660         u32 i;
 661         struct sk_buff *_skb;
 662         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 663         struct ieee80211_tx_info *txinfo;
 664
 665         SET_USB_STOP(rtlusb);
 666
 667         /* clean up rx stuff. */
 668         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 669
 670         /* clean up tx stuff */
 671         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 672                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 673                         rtlusb->usb_tx_cleanup(hw, _skb);
 674                         txinfo = IEEE80211_SKB_CB(_skb);
 675                         ieee80211_tx_info_clear_status(txinfo);
 676                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 677                         ieee80211_tx_status_irqsafe(hw, _skb);
 678                 }
 679                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 680         }
 681         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 682 }
 683
 684 /**
 685  *
 686  * We may add some struct into struct rtl_usb later. Do deinit here.
 687  *
 688  */
 689 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 690 {
 691         rtl_usb_cleanup(hw);
 692 }
 693
 694 static void rtl_usb_stop(struct ieee80211_hw *hw)
 695 {
 696         struct rtl_priv *rtlpriv = rtl_priv(hw);
 697         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 698         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 699
 700         /* should after adapter start and interrupt enable. */
 701         set_hal_stop(rtlhal);
 702         /* Enable software */
 703         SET_USB_STOP(rtlusb);
 704         rtl_usb_deinit(hw);
 705         rtlpriv->cfg->ops->hw_disable(hw);
 706 }
 707
 708 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 709 {
 710         int err;
 711         struct rtl_priv *rtlpriv = rtl_priv(hw);
 712         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 713
 714         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 715         err = usb_submit_urb(_urb, GFP_ATOMIC);
 716         if (err < 0) {
 717                 struct sk_buff *skb;
 718
 719                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 720                          ("Failed to submit urb.\n"));
 721                 usb_unanchor_urb(_urb);
 722                 skb = (struct sk_buff *)_urb->context;
 723                 kfree_skb(skb);
 724         }
 725         usb_free_urb(_urb);
 726 }
 727
 728 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 729                         struct sk_buff *skb)
 730 {
 731         struct rtl_priv *rtlpriv = rtl_priv(hw);
 732         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 733         struct ieee80211_tx_info *txinfo;
 734
 735         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 736         skb_pull(skb, RTL_TX_HEADER_SIZE);
 737         txinfo = IEEE80211_SKB_CB(skb);
 738         ieee80211_tx_info_clear_status(txinfo);
 739         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 740
 741         if (urb->status) {
 742                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 743                          ("Urb has error status 0x%X\n", urb->status));
 744                 goto out;
 745         }
 746         /*  TODO:       statistics */
 747 out:
 748         ieee80211_tx_status_irqsafe(hw, skb);
 749         return urb->status;
 750 }
 751
 752 static void _rtl_tx_complete(struct urb *urb)
 753 {
 754         struct sk_buff *skb = (struct sk_buff *)urb->context;
 755         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 756         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 757         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 758         int err;
 759
 760         if (unlikely(IS_USB_STOP(rtlusb)))
 761                 return;
 762         err = _usb_tx_post(hw, urb, skb);
 763         if (err) {
 764                 /* Ignore error and keep issuiing other urbs */
 765                 return;
 766         }
 767 }
 768
 769 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 770                                 struct sk_buff *skb, u32 ep_num)
 771 {
 772         struct rtl_priv *rtlpriv = rtl_priv(hw);
 773         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 774         struct urb *_urb;
 775
 776         WARN_ON(NULL == skb);
 777         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 778         if (!_urb) {
 779                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 780                          ("Can't allocate URB for bulk out!\n"));
 781                 kfree_skb(skb);
 782                 return NULL;
 783         }
 784         _rtl_install_trx_info(rtlusb, skb, ep_num);
 785         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 786                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 787         _urb->transfer_flags |= URB_ZERO_PACKET;
 788         return _urb;
 789 }
 790
 791 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 792                        enum rtl_txq qnum)
 793 {
 794         struct rtl_priv *rtlpriv = rtl_priv(hw);
 795         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 796         u32 ep_num;
 797         struct urb *_urb = NULL;
 798         struct sk_buff *_skb = NULL;
 799         struct sk_buff_head *skb_list;
 800         struct usb_anchor *urb_list;
 801
 802         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 803         if (unlikely(IS_USB_STOP(rtlusb))) {
 804                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 805                          ("USB device is stopping...\n"));
 806                 kfree_skb(skb);
 807                 return;
 808         }
 809         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 810         skb_list = &rtlusb->tx_skb_queue[ep_num];
 811         _skb = skb;
 812         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 813         if (unlikely(!_urb)) {
 814                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 815                          ("Can't allocate urb. Drop skb!\n"));
 816                 return;
 817         }
 818         urb_list = &rtlusb->tx_pending[ep_num];
 819         _rtl_submit_tx_urb(hw, _urb);
 820 }
 821
 822 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
 823                             u16 hw_queue)
 824 {
 825         struct rtl_priv *rtlpriv = rtl_priv(hw);
 826         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 827         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 828         struct rtl_tx_desc *pdesc = NULL;
 829         struct rtl_tcb_desc tcb_desc;
 830         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 831         __le16 fc = hdr->frame_control;
 832         u8 *pda_addr = hdr->addr1;
 833         /* ssn */
 834         u8 *qc = NULL;
 835         u8 tid = 0;
 836         u16 seq_number = 0;
 837
 838         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 839         if (ieee80211_is_auth(fc)) {
 840                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 841                 rtl_ips_nic_on(hw);
 842         }
 843
 844         if (rtlpriv->psc.sw_ps_enabled) {
 845                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 846                     !ieee80211_has_pm(fc))
 847                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 848         }
 849
 850         rtl_action_proc(hw, skb, true);
 851         if (is_multicast_ether_addr(pda_addr))
 852                 rtlpriv->stats.txbytesmulticast += skb->len;
 853         else if (is_broadcast_ether_addr(pda_addr))
 854                 rtlpriv->stats.txbytesbroadcast += skb->len;
 855         else
 856                 rtlpriv->stats.txbytesunicast += skb->len;
 857         if (ieee80211_is_data_qos(fc)) {
 858                 qc = ieee80211_get_qos_ctl(hdr);
 859                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 860                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 861                              IEEE80211_SCTL_SEQ) >> 4;
 862                 seq_number += 1;
 863                 seq_number <<= 4;
 864         }
 865         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
 866                                         hw_queue, &tcb_desc);
 867         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 868                 if (qc)
 869                         mac->tids[tid].seq_number = seq_number;
 870         }
 871         if (ieee80211_is_data(fc))
 872                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 873 }
 874
 875 static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 876                       struct rtl_tcb_desc *dummy)
 877 {
 878         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 879         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 880         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 881         __le16 fc = hdr->frame_control;
 882         u16 hw_queue;
 883
 884         if (unlikely(is_hal_stop(rtlhal)))
 885                 goto err_free;
 886         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 887         _rtl_usb_tx_preprocess(hw, skb, hw_queue);
 888         _rtl_usb_transmit(hw, skb, hw_queue);
 889         return NETDEV_TX_OK;
 890
 891 err_free:
 892         dev_kfree_skb_any(skb);
 893         return NETDEV_TX_OK;
 894 }
 895
 896 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 897                                         struct sk_buff *skb)
 898 {
 899         return false;
 900 }
 901
 902 static struct rtl_intf_ops rtl_usb_ops = {
 903         .adapter_start = rtl_usb_start,
 904         .adapter_stop = rtl_usb_stop,
 905         .adapter_tx = rtl_usb_tx,
 906         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 907 };
 908
 909 int __devinit rtl_usb_probe(struct usb_interface *intf,
 910                         const struct usb_device_id *id)
 911 {
 912         int err;
 913         struct ieee80211_hw *hw = NULL;
 914         struct rtl_priv *rtlpriv = NULL;
 915         struct usb_device       *udev;
 916         struct rtl_usb_priv *usb_priv;
 917
 918         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 919                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 920         if (!hw) {
 921                 RT_ASSERT(false, ("%s : ieee80211 alloc failed\n", __func__));
 922                 return -ENOMEM;
 923         }
 924         rtlpriv = hw->priv;
 925         SET_IEEE80211_DEV(hw, &intf->dev);
 926         udev = interface_to_usbdev(intf);
 927         usb_get_dev(udev);
 928         usb_priv = rtl_usbpriv(hw);
 929         memset(usb_priv, 0, sizeof(*usb_priv));
 930         usb_priv->dev.intf = intf;
 931         usb_priv->dev.udev = udev;
 932         usb_set_intfdata(intf, hw);
 933         /* init cfg & intf_ops */
 934         rtlpriv->rtlhal.interface = INTF_USB;
 935         rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
 936         rtlpriv->intf_ops = &rtl_usb_ops;
 937         rtl_dbgp_flag_init(hw);
 938         /* Init IO handler */
 939         _rtl_usb_io_handler_init(&udev->dev, hw);
 940         rtlpriv->cfg->ops->read_chip_version(hw);
 941         /*like read eeprom and so on */
 942         rtlpriv->cfg->ops->read_eeprom_info(hw);
 943         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
 944                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 945                          ("Can't init_sw_vars.\n"));
 946                 goto error_out;
 947         }
 948         rtlpriv->cfg->ops->init_sw_leds(hw);
 949         err = _rtl_usb_init(hw);
 950         err = _rtl_usb_init_sw(hw);
 951         /* Init mac80211 sw */
 952         err = rtl_init_core(hw);
 953         if (err) {
 954                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 955                          ("Can't allocate sw for mac80211.\n"));
 956                 goto error_out;
 957         }
 958
 959         /*init rfkill */
 960         /* rtl_init_rfkill(hw); */
 961
 962         err = ieee80211_register_hw(hw);
 963         if (err) {
 964                 RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG,
 965                          ("Can't register mac80211 hw.\n"));
 966                 goto error_out;
 967         } else {
 968                 rtlpriv->mac80211.mac80211_registered = 1;
 969         }
 970         set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
 971         return 0;
 972 error_out:
 973         rtl_deinit_core(hw);
 974         _rtl_usb_io_handler_release(hw);
 975         ieee80211_free_hw(hw);
 976         usb_put_dev(udev);
 977         return -ENODEV;
 978 }
 979 EXPORT_SYMBOL(rtl_usb_probe);
 980
 981 void rtl_usb_disconnect(struct usb_interface *intf)
 982 {
 983         struct ieee80211_hw *hw = usb_get_intfdata(intf);
 984         struct rtl_priv *rtlpriv = rtl_priv(hw);
 985         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 986         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 987
 988         if (unlikely(!rtlpriv))
 989                 return;
 990         /*ieee80211_unregister_hw will call ops_stop */
 991         if (rtlmac->mac80211_registered == 1) {
 992                 ieee80211_unregister_hw(hw);
 993                 rtlmac->mac80211_registered = 0;
 994         } else {
 995                 rtl_deinit_deferred_work(hw);
 996                 rtlpriv->intf_ops->adapter_stop(hw);
 997         }
 998         /*deinit rfkill */
 999         /* rtl_deinit_rfkill(hw); */
1000         rtl_usb_deinit(hw);
1001         rtl_deinit_core(hw);
1002         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1003         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1004         _rtl_usb_io_handler_release(hw);
1005         usb_put_dev(rtlusb->udev);
1006         usb_set_intfdata(intf, NULL);
1007         ieee80211_free_hw(hw);
1008 }
1009 EXPORT_SYMBOL(rtl_usb_disconnect);
1010
1011 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1012 {
1013         return 0;
1014 }
1015 EXPORT_SYMBOL(rtl_usb_suspend);
1016
1017 int rtl_usb_resume(struct usb_interface *pusb_intf)
1018 {
1019         return 0;
1020 }
1021 EXPORT_SYMBOL(rtl_usb_resume);