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