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 rtl_priv *rtlpriv, u32 addr, u16 len)
 117 {
 118         struct device *dev = rtlpriv->io.dev;
 119         struct usb_device *udev = to_usb_device(dev);
 120         u8 request;
 121         u16 wvalue;
 122         u16 index;
 123         __le32 *data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 124
 125         request = REALTEK_USB_VENQT_CMD_REQ;
 126         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 127
 128         wvalue = (u16)addr;
 129         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 130         if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 131                 rtlpriv->usb_data_index = 0;
 132         return le32_to_cpu(*data);
 133 }
 134
 135 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 136 {
 137         return (u8)_usb_read_sync(rtlpriv, addr, 1);
 138 }
 139
 140 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 141 {
 142         return (u16)_usb_read_sync(rtlpriv, addr, 2);
 143 }
 144
 145 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 146 {
 147         return _usb_read_sync(rtlpriv, addr, 4);
 148 }
 149
 150 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 151                              u16 len)
 152 {
 153         u8 request;
 154         u16 wvalue;
 155         u16 index;
 156         u32 data;
 157
 158         request = REALTEK_USB_VENQT_CMD_REQ;
 159         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 160         wvalue = (u16)(addr&0x0000ffff);
 161         data = val;
 162         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 163                                        len);
 164 }
 165
 166 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 167 {
 168         struct device *dev = rtlpriv->io.dev;
 169
 170         _usb_write_async(to_usb_device(dev), addr, val, 1);
 171 }
 172
 173 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 174 {
 175         struct device *dev = rtlpriv->io.dev;
 176
 177         _usb_write_async(to_usb_device(dev), addr, val, 2);
 178 }
 179
 180 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 181 {
 182         struct device *dev = rtlpriv->io.dev;
 183
 184         _usb_write_async(to_usb_device(dev), addr, val, 4);
 185 }
 186
 187 static void _rtl_usb_io_handler_init(struct device *dev,
 188                                      struct ieee80211_hw *hw)
 189 {
 190         struct rtl_priv *rtlpriv = rtl_priv(hw);
 191
 192         rtlpriv->io.dev = dev;
 193         mutex_init(&rtlpriv->io.bb_mutex);
 194         rtlpriv->io.write8_async        = _usb_write8_async;
 195         rtlpriv->io.write16_async       = _usb_write16_async;
 196         rtlpriv->io.write32_async       = _usb_write32_async;
 197         rtlpriv->io.read8_sync          = _usb_read8_sync;
 198         rtlpriv->io.read16_sync         = _usb_read16_sync;
 199         rtlpriv->io.read32_sync         = _usb_read32_sync;
 200 }
 201
 202 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 203 {
 204         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 205
 206         mutex_destroy(&rtlpriv->io.bb_mutex);
 207 }
 208
 209 /**
 210  *
 211  *      Default aggregation handler. Do nothing and just return the oldest skb.
 212  */
 213 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 214                                                   struct sk_buff_head *list)
 215 {
 216         return skb_dequeue(list);
 217 }
 218
 219 #define IS_HIGH_SPEED_USB(udev) \
 220                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 221
 222 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 223 {
 224         u32 i;
 225         struct rtl_priv *rtlpriv = rtl_priv(hw);
 226         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 227
 228         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 229                                                     ? USB_HIGH_SPEED_BULK_SIZE
 230                                                     : USB_FULL_SPEED_BULK_SIZE;
 231
 232         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("USB Max Bulk-out Size=%d\n",
 233                  rtlusb->max_bulk_out_size));
 234
 235         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 236                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 237                 if (!ep_num) {
 238                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 239                                  ("Invalid endpoint map setting!\n"));
 240                         return -EINVAL;
 241                 }
 242         }
 243
 244         rtlusb->usb_tx_post_hdl =
 245                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 246         rtlusb->usb_tx_cleanup  =
 247                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 248         rtlusb->usb_tx_aggregate_hdl =
 249                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 250                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 251                  : &_none_usb_tx_aggregate_hdl;
 252
 253         init_usb_anchor(&rtlusb->tx_submitted);
 254         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 255                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 256                 init_usb_anchor(&rtlusb->tx_pending[i]);
 257         }
 258         return 0;
 259 }
 260
 261 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 262 {
 263         struct rtl_priv *rtlpriv = rtl_priv(hw);
 264         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 265         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 266
 267         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 268         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 269         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 270         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 271         rtlusb->usb_rx_segregate_hdl =
 272                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 273
 274         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 275                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 276         init_usb_anchor(&rtlusb->rx_submitted);
 277         return 0;
 278 }
 279
 280 static int _rtl_usb_init(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         int err;
 286         u8 epidx;
 287         struct usb_interface    *usb_intf = rtlusb->intf;
 288         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 289
 290         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 291         for (epidx = 0; epidx < epnums; epidx++) {
 292                 struct usb_endpoint_descriptor *pep_desc;
 293                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 294
 295                 if (usb_endpoint_dir_in(pep_desc))
 296                         rtlusb->in_ep_nums++;
 297                 else if (usb_endpoint_dir_out(pep_desc))
 298                         rtlusb->out_ep_nums++;
 299
 300                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 301                          ("USB EP(0x%02x), MaxPacketSize=%d ,Interval=%d.\n",
 302                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 303                          pep_desc->bInterval));
 304         }
 305         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num)
 306                 return -EINVAL ;
 307
 308         /* usb endpoint mapping */
 309         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 310         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 311         _rtl_usb_init_tx(hw);
 312         _rtl_usb_init_rx(hw);
 313         return err;
 314 }
 315
 316 static int _rtl_usb_init_sw(struct ieee80211_hw *hw)
 317 {
 318         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 319         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 320         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 321         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 322
 323         rtlhal->hw = hw;
 324         ppsc->inactiveps = false;
 325         ppsc->leisure_ps = false;
 326         ppsc->fwctrl_lps = false;
 327         ppsc->reg_fwctrl_lps = 3;
 328         ppsc->reg_max_lps_awakeintvl = 5;
 329         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 330
 331          /* IBSS */
 332         mac->beacon_interval = 100;
 333
 334          /* AMPDU */
 335         mac->min_space_cfg = 0;
 336         mac->max_mss_density = 0;
 337
 338         /* set sane AMPDU defaults */
 339         mac->current_ampdu_density = 7;
 340         mac->current_ampdu_factor = 3;
 341
 342         /* QOS */
 343         rtlusb->acm_method = eAcmWay2_SW;
 344
 345         /* IRQ */
 346         /* HIMR - turn all on */
 347         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 348         /* HIMR_EX - turn all on */
 349         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 350         rtlusb->disableHWSM =  true;
 351         return 0;
 352 }
 353
 354 #define __RADIO_TAP_SIZE_RSV    32
 355
 356 static void _rtl_rx_completed(struct urb *urb);
 357
 358 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
 359                                         struct rtl_usb *rtlusb,
 360                                         struct urb *urb,
 361                                         gfp_t gfp_mask)
 362 {
 363         struct sk_buff *skb;
 364         struct rtl_priv *rtlpriv = rtl_priv(hw);
 365
 366         skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
 367                                gfp_mask);
 368         if (!skb) {
 369                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 370                          ("Failed to __dev_alloc_skb!!\n"))
 371                 return ERR_PTR(-ENOMEM);
 372         }
 373
 374         /* reserve some space for mac80211's radiotap */
 375         skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 376         usb_fill_bulk_urb(urb, rtlusb->udev,
 377                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 378                           skb->data, min(skb_tailroom(skb),
 379                           (int)rtlusb->rx_max_size),
 380                           _rtl_rx_completed, skb);
 381
 382         _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 383         return skb;
 384 }
 385
 386 #undef __RADIO_TAP_SIZE_RSV
 387
 388 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 389                                     struct sk_buff *skb)
 390 {
 391         struct rtl_priv *rtlpriv = rtl_priv(hw);
 392         u8 *rxdesc = skb->data;
 393         struct ieee80211_hdr *hdr;
 394         bool unicast = false;
 395         __le16 fc;
 396         struct ieee80211_rx_status rx_status = {0};
 397         struct rtl_stats stats = {
 398                 .signal = 0,
 399                 .noise = -98,
 400                 .rate = 0,
 401         };
 402
 403         skb_pull(skb, RTL_RX_DESC_SIZE);
 404         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 405         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 406         hdr = (struct ieee80211_hdr *)(skb->data);
 407         fc = hdr->frame_control;
 408         if (!stats.crc) {
 409                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 410
 411                 if (is_broadcast_ether_addr(hdr->addr1)) {
 412                         /*TODO*/;
 413                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 414                         /*TODO*/
 415                 } else {
 416                         unicast = true;
 417                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 418                 }
 419
 420                 rtl_is_special_data(hw, skb, false);
 421
 422                 if (ieee80211_is_data(fc)) {
 423                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 424
 425                         if (unicast)
 426                                 rtlpriv->link_info.num_rx_inperiod++;
 427                 }
 428         }
 429 }
 430
 431 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 432                                       struct sk_buff *skb)
 433 {
 434         struct rtl_priv *rtlpriv = rtl_priv(hw);
 435         u8 *rxdesc = skb->data;
 436         struct ieee80211_hdr *hdr;
 437         bool unicast = false;
 438         __le16 fc;
 439         struct ieee80211_rx_status rx_status = {0};
 440         struct rtl_stats stats = {
 441                 .signal = 0,
 442                 .noise = -98,
 443                 .rate = 0,
 444         };
 445
 446         skb_pull(skb, RTL_RX_DESC_SIZE);
 447         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 448         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 449         hdr = (struct ieee80211_hdr *)(skb->data);
 450         fc = hdr->frame_control;
 451         if (!stats.crc) {
 452                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 453
 454                 if (is_broadcast_ether_addr(hdr->addr1)) {
 455                         /*TODO*/;
 456                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 457                         /*TODO*/
 458                 } else {
 459                         unicast = true;
 460                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 461                 }
 462
 463                 rtl_is_special_data(hw, skb, false);
 464
 465                 if (ieee80211_is_data(fc)) {
 466                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 467
 468                         if (unicast)
 469                                 rtlpriv->link_info.num_rx_inperiod++;
 470                 }
 471                 if (likely(rtl_action_proc(hw, skb, false))) {
 472                         struct sk_buff *uskb = NULL;
 473                         u8 *pdata;
 474
 475                         uskb = dev_alloc_skb(skb->len + 128);
 476                         if (uskb) {     /* drop packet on allocation failure */
 477                                 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 478                                        sizeof(rx_status));
 479                                 pdata = (u8 *)skb_put(uskb, skb->len);
 480                                 memcpy(pdata, skb->data, skb->len);
 481                                 ieee80211_rx_irqsafe(hw, uskb);
 482                         }
 483                         dev_kfree_skb_any(skb);
 484                 } else {
 485                         dev_kfree_skb_any(skb);
 486                 }
 487         }
 488 }
 489
 490 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 491 {
 492         struct sk_buff *_skb;
 493         struct sk_buff_head rx_queue;
 494         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 495
 496         skb_queue_head_init(&rx_queue);
 497         if (rtlusb->usb_rx_segregate_hdl)
 498                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 499         WARN_ON(skb_queue_empty(&rx_queue));
 500         while (!skb_queue_empty(&rx_queue)) {
 501                 _skb = skb_dequeue(&rx_queue);
 502                 _rtl_usb_rx_process_agg(hw, skb);
 503                 ieee80211_rx_irqsafe(hw, skb);
 504         }
 505 }
 506
 507 static void _rtl_rx_completed(struct urb *_urb)
 508 {
 509         struct sk_buff *skb = (struct sk_buff *)_urb->context;
 510         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 511         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 512         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 513         struct rtl_priv *rtlpriv = rtl_priv(hw);
 514         int err = 0;
 515
 516         if (unlikely(IS_USB_STOP(rtlusb)))
 517                 goto free;
 518
 519         if (likely(0 == _urb->status)) {
 520                 /* If this code were moved to work queue, would CPU
 521                  * utilization be improved?  NOTE: We shall allocate another skb
 522                  * and reuse the original one.
 523                  */
 524                 skb_put(skb, _urb->actual_length);
 525
 526                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 527                         struct sk_buff *_skb;
 528                         _rtl_usb_rx_process_noagg(hw, skb);
 529                         _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
 530                         if (IS_ERR(_skb)) {
 531                                 err = PTR_ERR(_skb);
 532                                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 533                                         ("Can't allocate skb for bulk IN!\n"));
 534                                 return;
 535                         }
 536                         skb = _skb;
 537                 } else{
 538                         /* TO DO */
 539                         _rtl_rx_pre_process(hw, skb);
 540                         pr_err("rx agg not supported\n");
 541                 }
 542                 goto resubmit;
 543         }
 544
 545         switch (_urb->status) {
 546         /* disconnect */
 547         case -ENOENT:
 548         case -ECONNRESET:
 549         case -ENODEV:
 550         case -ESHUTDOWN:
 551                 goto free;
 552         default:
 553                 break;
 554         }
 555
 556 resubmit:
 557         skb_reset_tail_pointer(skb);
 558         skb_trim(skb, 0);
 559
 560         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 561         err = usb_submit_urb(_urb, GFP_ATOMIC);
 562         if (unlikely(err)) {
 563                 usb_unanchor_urb(_urb);
 564                 goto free;
 565         }
 566         return;
 567
 568 free:
 569         dev_kfree_skb_irq(skb);
 570 }
 571
 572 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 573 {
 574         struct urb *urb;
 575         struct sk_buff *skb;
 576         int err;
 577         int i;
 578         struct rtl_priv *rtlpriv = rtl_priv(hw);
 579         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 580
 581         WARN_ON(0 == rtlusb->rx_urb_num);
 582         /* 1600 == 1514 + max WLAN header + rtk info */
 583         WARN_ON(rtlusb->rx_max_size < 1600);
 584
 585         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 586                 err = -ENOMEM;
 587                 urb = usb_alloc_urb(0, GFP_KERNEL);
 588                 if (!urb) {
 589                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 590                                  ("Failed to alloc URB!!\n"))
 591                         goto err_out;
 592                 }
 593
 594                 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 595                 if (IS_ERR(skb)) {
 596                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 597                                  ("Failed to prep_rx_urb!!\n"))
 598                         err = PTR_ERR(skb);
 599                         goto err_out;
 600                 }
 601
 602                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 603                 err = usb_submit_urb(urb, GFP_KERNEL);
 604                 if (err)
 605                         goto err_out;
 606                 usb_free_urb(urb);
 607         }
 608         return 0;
 609
 610 err_out:
 611         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 612         return err;
 613 }
 614
 615 static int rtl_usb_start(struct ieee80211_hw *hw)
 616 {
 617         int err;
 618         struct rtl_priv *rtlpriv = rtl_priv(hw);
 619         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 620         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 621
 622         err = rtlpriv->cfg->ops->hw_init(hw);
 623         rtl_init_rx_config(hw);
 624
 625         /* Enable software */
 626         SET_USB_START(rtlusb);
 627         /* should after adapter start and interrupt enable. */
 628         set_hal_start(rtlhal);
 629
 630         /* Start bulk IN */
 631         _rtl_usb_receive(hw);
 632
 633         return err;
 634 }
 635 /**
 636  *
 637  *
 638  */
 639
 640 /*=======================  tx =========================================*/
 641 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 642 {
 643         u32 i;
 644         struct sk_buff *_skb;
 645         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 646         struct ieee80211_tx_info *txinfo;
 647
 648         SET_USB_STOP(rtlusb);
 649
 650         /* clean up rx stuff. */
 651         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 652
 653         /* clean up tx stuff */
 654         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 655                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 656                         rtlusb->usb_tx_cleanup(hw, _skb);
 657                         txinfo = IEEE80211_SKB_CB(_skb);
 658                         ieee80211_tx_info_clear_status(txinfo);
 659                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 660                         ieee80211_tx_status_irqsafe(hw, _skb);
 661                 }
 662                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 663         }
 664         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 665 }
 666
 667 /**
 668  *
 669  * We may add some struct into struct rtl_usb later. Do deinit here.
 670  *
 671  */
 672 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 673 {
 674         rtl_usb_cleanup(hw);
 675 }
 676
 677 static void rtl_usb_stop(struct ieee80211_hw *hw)
 678 {
 679         struct rtl_priv *rtlpriv = rtl_priv(hw);
 680         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 681         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 682
 683         /* should after adapter start and interrupt enable. */
 684         set_hal_stop(rtlhal);
 685         /* Enable software */
 686         SET_USB_STOP(rtlusb);
 687         rtl_usb_deinit(hw);
 688         rtlpriv->cfg->ops->hw_disable(hw);
 689 }
 690
 691 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 692 {
 693         int err;
 694         struct rtl_priv *rtlpriv = rtl_priv(hw);
 695         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 696
 697         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 698         err = usb_submit_urb(_urb, GFP_ATOMIC);
 699         if (err < 0) {
 700                 struct sk_buff *skb;
 701
 702                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 703                          ("Failed to submit urb.\n"));
 704                 usb_unanchor_urb(_urb);
 705                 skb = (struct sk_buff *)_urb->context;
 706                 kfree_skb(skb);
 707         }
 708         usb_free_urb(_urb);
 709 }
 710
 711 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 712                         struct sk_buff *skb)
 713 {
 714         struct rtl_priv *rtlpriv = rtl_priv(hw);
 715         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 716         struct ieee80211_tx_info *txinfo;
 717
 718         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 719         skb_pull(skb, RTL_TX_HEADER_SIZE);
 720         txinfo = IEEE80211_SKB_CB(skb);
 721         ieee80211_tx_info_clear_status(txinfo);
 722         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 723
 724         if (urb->status) {
 725                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 726                          ("Urb has error status 0x%X\n", urb->status));
 727                 goto out;
 728         }
 729         /*  TODO:       statistics */
 730 out:
 731         ieee80211_tx_status_irqsafe(hw, skb);
 732         return urb->status;
 733 }
 734
 735 static void _rtl_tx_complete(struct urb *urb)
 736 {
 737         struct sk_buff *skb = (struct sk_buff *)urb->context;
 738         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 739         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 740         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 741         int err;
 742
 743         if (unlikely(IS_USB_STOP(rtlusb)))
 744                 return;
 745         err = _usb_tx_post(hw, urb, skb);
 746         if (err) {
 747                 /* Ignore error and keep issuiing other urbs */
 748                 return;
 749         }
 750 }
 751
 752 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 753                                 struct sk_buff *skb, u32 ep_num)
 754 {
 755         struct rtl_priv *rtlpriv = rtl_priv(hw);
 756         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 757         struct urb *_urb;
 758
 759         WARN_ON(NULL == skb);
 760         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 761         if (!_urb) {
 762                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 763                          ("Can't allocate URB for bulk out!\n"));
 764                 kfree_skb(skb);
 765                 return NULL;
 766         }
 767         _rtl_install_trx_info(rtlusb, skb, ep_num);
 768         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 769                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 770         _urb->transfer_flags |= URB_ZERO_PACKET;
 771         return _urb;
 772 }
 773
 774 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 775                        enum rtl_txq qnum)
 776 {
 777         struct rtl_priv *rtlpriv = rtl_priv(hw);
 778         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 779         u32 ep_num;
 780         struct urb *_urb = NULL;
 781         struct sk_buff *_skb = NULL;
 782         struct sk_buff_head *skb_list;
 783         struct usb_anchor *urb_list;
 784
 785         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 786         if (unlikely(IS_USB_STOP(rtlusb))) {
 787                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 788                          ("USB device is stopping...\n"));
 789                 kfree_skb(skb);
 790                 return;
 791         }
 792         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 793         skb_list = &rtlusb->tx_skb_queue[ep_num];
 794         _skb = skb;
 795         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 796         if (unlikely(!_urb)) {
 797                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 798                          ("Can't allocate urb. Drop skb!\n"));
 799                 return;
 800         }
 801         urb_list = &rtlusb->tx_pending[ep_num];
 802         _rtl_submit_tx_urb(hw, _urb);
 803 }
 804
 805 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
 806                             u16 hw_queue)
 807 {
 808         struct rtl_priv *rtlpriv = rtl_priv(hw);
 809         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 810         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 811         struct rtl_tx_desc *pdesc = NULL;
 812         struct rtl_tcb_desc tcb_desc;
 813         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 814         __le16 fc = hdr->frame_control;
 815         u8 *pda_addr = hdr->addr1;
 816         /* ssn */
 817         u8 *qc = NULL;
 818         u8 tid = 0;
 819         u16 seq_number = 0;
 820
 821         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 822         if (ieee80211_is_auth(fc)) {
 823                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 824                 rtl_ips_nic_on(hw);
 825         }
 826
 827         if (rtlpriv->psc.sw_ps_enabled) {
 828                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 829                     !ieee80211_has_pm(fc))
 830                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 831         }
 832
 833         rtl_action_proc(hw, skb, true);
 834         if (is_multicast_ether_addr(pda_addr))
 835                 rtlpriv->stats.txbytesmulticast += skb->len;
 836         else if (is_broadcast_ether_addr(pda_addr))
 837                 rtlpriv->stats.txbytesbroadcast += skb->len;
 838         else
 839                 rtlpriv->stats.txbytesunicast += skb->len;
 840         if (ieee80211_is_data_qos(fc)) {
 841                 qc = ieee80211_get_qos_ctl(hdr);
 842                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 843                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 844                              IEEE80211_SCTL_SEQ) >> 4;
 845                 seq_number += 1;
 846                 seq_number <<= 4;
 847         }
 848         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
 849                                         hw_queue, &tcb_desc);
 850         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 851                 if (qc)
 852                         mac->tids[tid].seq_number = seq_number;
 853         }
 854         if (ieee80211_is_data(fc))
 855                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 856 }
 857
 858 static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 859                       struct rtl_tcb_desc *dummy)
 860 {
 861         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 862         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 863         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 864         __le16 fc = hdr->frame_control;
 865         u16 hw_queue;
 866
 867         if (unlikely(is_hal_stop(rtlhal)))
 868                 goto err_free;
 869         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 870         _rtl_usb_tx_preprocess(hw, skb, hw_queue);
 871         _rtl_usb_transmit(hw, skb, hw_queue);
 872         return NETDEV_TX_OK;
 873
 874 err_free:
 875         dev_kfree_skb_any(skb);
 876         return NETDEV_TX_OK;
 877 }
 878
 879 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 880                                         struct sk_buff *skb)
 881 {
 882         return false;
 883 }
 884
 885 static struct rtl_intf_ops rtl_usb_ops = {
 886         .adapter_start = rtl_usb_start,
 887         .adapter_stop = rtl_usb_stop,
 888         .adapter_tx = rtl_usb_tx,
 889         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 890 };
 891
 892 int __devinit rtl_usb_probe(struct usb_interface *intf,
 893                         const struct usb_device_id *id)
 894 {
 895         int err;
 896         struct ieee80211_hw *hw = NULL;
 897         struct rtl_priv *rtlpriv = NULL;
 898         struct usb_device       *udev;
 899         struct rtl_usb_priv *usb_priv;
 900
 901         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 902                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 903         if (!hw) {
 904                 RT_ASSERT(false, ("%s : ieee80211 alloc failed\n", __func__));
 905                 return -ENOMEM;
 906         }
 907         rtlpriv = hw->priv;
 908         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
 909                                     GFP_KERNEL);
 910         if (!rtlpriv->usb_data)
 911                 return -ENOMEM;
 912         rtlpriv->usb_data_index = 0;
 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         kfree(rtlpriv->usb_data);
 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);