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 #include <linux/usb.h>
  28 #include "core.h"
  29 #include "wifi.h"
  30 #include "usb.h"
  31 #include "base.h"
  32 #include "ps.h"
  33
  34 #define REALTEK_USB_VENQT_READ                  0xC0
  35 #define REALTEK_USB_VENQT_WRITE                 0x40
  36 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  37 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  38
  39 #define REALTEK_USB_VENQT_MAX_BUF_SIZE          254
  40
  41 static void usbctrl_async_callback(struct urb *urb)
  42 {
  43         if (urb)
  44                 kfree(urb->context);
  45 }
  46
  47 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  48                                           u16 value, u16 index, void *pdata,
  49                                           u16 len)
  50 {
  51         int rc;
  52         unsigned int pipe;
  53         u8 reqtype;
  54         struct usb_ctrlrequest *dr;
  55         struct urb *urb;
  56         struct rtl819x_async_write_data {
  57                 u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
  58                 struct usb_ctrlrequest dr;
  59         } *buf;
  60
  61         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  62         reqtype =  REALTEK_USB_VENQT_WRITE;
  63
  64         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
  65         if (!buf)
  66                 return -ENOMEM;
  67
  68         urb = usb_alloc_urb(0, GFP_ATOMIC);
  69         if (!urb) {
  70                 kfree(buf);
  71                 return -ENOMEM;
  72         }
  73
  74         dr = &buf->dr;
  75
  76         dr->bRequestType = reqtype;
  77         dr->bRequest = request;
  78         dr->wValue = cpu_to_le16(value);
  79         dr->wIndex = cpu_to_le16(index);
  80         dr->wLength = cpu_to_le16(len);
  81         memcpy(buf, pdata, len);
  82         usb_fill_control_urb(urb, udev, pipe,
  83                              (unsigned char *)dr, buf, len,
  84                              usbctrl_async_callback, buf);
  85         rc = usb_submit_urb(urb, GFP_ATOMIC);
  86         if (rc < 0)
  87                 kfree(buf);
  88         usb_free_urb(urb);
  89         return rc;
  90 }
  91
  92 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
  93                                         u16 value, u16 index, void *pdata,
  94                                         u16 len)
  95 {
  96         unsigned int pipe;
  97         int status;
  98         u8 reqtype;
  99
 100         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 101         reqtype =  REALTEK_USB_VENQT_READ;
 102
 103         status = usb_control_msg(udev, pipe, request, reqtype, value, index,
 104                                  pdata, len, 0); /* max. timeout */
 105
 106         if (status < 0)
 107                 printk(KERN_ERR "reg 0x%x, usbctrl_vendorreq TimeOut! "
 108                        "status:0x%x value=0x%x\n", value, status,
 109                        *(u32 *)pdata);
 110         return status;
 111 }
 112
 113 static u32 _usb_read_sync(struct usb_device *udev, u32 addr, u16 len)
 114 {
 115         u8 request;
 116         u16 wvalue;
 117         u16 index;
 118         u32 *data;
 119         u32 ret;
 120
 121         data = kmalloc(sizeof(u32), GFP_KERNEL);
 122         if (!data)
 123                 return -ENOMEM;
 124         request = REALTEK_USB_VENQT_CMD_REQ;
 125         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 126
 127         wvalue = (u16)addr;
 128         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 129         ret = *data;
 130         kfree(data);
 131         return ret;
 132 }
 133
 134 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 135 {
 136         struct device *dev = rtlpriv->io.dev;
 137
 138         return (u8)_usb_read_sync(to_usb_device(dev), addr, 1);
 139 }
 140
 141 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 142 {
 143         struct device *dev = rtlpriv->io.dev;
 144
 145         return (u16)_usb_read_sync(to_usb_device(dev), addr, 2);
 146 }
 147
 148 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 149 {
 150         struct device *dev = rtlpriv->io.dev;
 151
 152         return _usb_read_sync(to_usb_device(dev), addr, 4);
 153 }
 154
 155 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 156                              u16 len)
 157 {
 158         u8 request;
 159         u16 wvalue;
 160         u16 index;
 161         u32 data;
 162
 163         request = REALTEK_USB_VENQT_CMD_REQ;
 164         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 165         wvalue = (u16)(addr&0x0000ffff);
 166         data = val;
 167         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 168                                        len);
 169 }
 170
 171 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 172 {
 173         struct device *dev = rtlpriv->io.dev;
 174
 175         _usb_write_async(to_usb_device(dev), addr, val, 1);
 176 }
 177
 178 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 179 {
 180         struct device *dev = rtlpriv->io.dev;
 181
 182         _usb_write_async(to_usb_device(dev), addr, val, 2);
 183 }
 184
 185 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 186 {
 187         struct device *dev = rtlpriv->io.dev;
 188
 189         _usb_write_async(to_usb_device(dev), addr, val, 4);
 190 }
 191
 192 static int _usb_nbytes_read_write(struct usb_device *udev, bool read, u32 addr,
 193                                   u16 len, u8 *pdata)
 194 {
 195         int status;
 196         u8 request;
 197         u16 wvalue;
 198         u16 index;
 199
 200         request = REALTEK_USB_VENQT_CMD_REQ;
 201         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 202         wvalue = (u16)addr;
 203         if (read)
 204                 status = _usbctrl_vendorreq_sync_read(udev, request, wvalue,
 205                                                       index, pdata, len);
 206         else
 207                 status = _usbctrl_vendorreq_async_write(udev, request, wvalue,
 208                                                         index, pdata, len);
 209         return status;
 210 }
 211
 212 static int _usb_readN_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len,
 213                            u8 *pdata)
 214 {
 215         struct device *dev = rtlpriv->io.dev;
 216
 217         return _usb_nbytes_read_write(to_usb_device(dev), true, addr, len,
 218                                        pdata);
 219 }
 220
 221 static int _usb_writeN_async(struct rtl_priv *rtlpriv, u32 addr, u16 len,
 222                              u8 *pdata)
 223 {
 224         struct device *dev = rtlpriv->io.dev;
 225
 226         return _usb_nbytes_read_write(to_usb_device(dev), false, addr, len,
 227                                       pdata);
 228 }
 229
 230 static void _rtl_usb_io_handler_init(struct device *dev,
 231                                      struct ieee80211_hw *hw)
 232 {
 233         struct rtl_priv *rtlpriv = rtl_priv(hw);
 234
 235         rtlpriv->io.dev = dev;
 236         mutex_init(&rtlpriv->io.bb_mutex);
 237         rtlpriv->io.write8_async        = _usb_write8_async;
 238         rtlpriv->io.write16_async       = _usb_write16_async;
 239         rtlpriv->io.write32_async       = _usb_write32_async;
 240         rtlpriv->io.writeN_async        = _usb_writeN_async;
 241         rtlpriv->io.read8_sync          = _usb_read8_sync;
 242         rtlpriv->io.read16_sync         = _usb_read16_sync;
 243         rtlpriv->io.read32_sync         = _usb_read32_sync;
 244         rtlpriv->io.readN_sync          = _usb_readN_sync;
 245 }
 246
 247 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 248 {
 249         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 250
 251         mutex_destroy(&rtlpriv->io.bb_mutex);
 252 }
 253
 254 /**
 255  *
 256  *      Default aggregation handler. Do nothing and just return the oldest skb.
 257  */
 258 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 259                                                   struct sk_buff_head *list)
 260 {
 261         return skb_dequeue(list);
 262 }
 263
 264 #define IS_HIGH_SPEED_USB(udev) \
 265                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 266
 267 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 268 {
 269         u32 i;
 270         struct rtl_priv *rtlpriv = rtl_priv(hw);
 271         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 272
 273         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 274                                                     ? USB_HIGH_SPEED_BULK_SIZE
 275                                                     : USB_FULL_SPEED_BULK_SIZE;
 276
 277         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("USB Max Bulk-out Size=%d\n",
 278                  rtlusb->max_bulk_out_size));
 279
 280         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 281                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 282                 if (!ep_num) {
 283                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 284                                  ("Invalid endpoint map setting!\n"));
 285                         return -EINVAL;
 286                 }
 287         }
 288
 289         rtlusb->usb_tx_post_hdl =
 290                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 291         rtlusb->usb_tx_cleanup  =
 292                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 293         rtlusb->usb_tx_aggregate_hdl =
 294                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 295                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 296                  : &_none_usb_tx_aggregate_hdl;
 297
 298         init_usb_anchor(&rtlusb->tx_submitted);
 299         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 300                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 301                 init_usb_anchor(&rtlusb->tx_pending[i]);
 302         }
 303         return 0;
 304 }
 305
 306 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 307 {
 308         struct rtl_priv *rtlpriv = rtl_priv(hw);
 309         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 310         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 311
 312         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 313         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 314         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 315         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 316         rtlusb->usb_rx_segregate_hdl =
 317                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 318
 319         printk(KERN_INFO "rtl8192cu: rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 320                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 321         init_usb_anchor(&rtlusb->rx_submitted);
 322         return 0;
 323 }
 324
 325 static int _rtl_usb_init(struct ieee80211_hw *hw)
 326 {
 327         struct rtl_priv *rtlpriv = rtl_priv(hw);
 328         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 329         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 330         int err;
 331         u8 epidx;
 332         struct usb_interface    *usb_intf = rtlusb->intf;
 333         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 334
 335         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 336         for (epidx = 0; epidx < epnums; epidx++) {
 337                 struct usb_endpoint_descriptor *pep_desc;
 338                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 339
 340                 if (usb_endpoint_dir_in(pep_desc))
 341                         rtlusb->in_ep_nums++;
 342                 else if (usb_endpoint_dir_out(pep_desc))
 343                         rtlusb->out_ep_nums++;
 344
 345                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 346                          ("USB EP(0x%02x), MaxPacketSize=%d ,Interval=%d.\n",
 347                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 348                          pep_desc->bInterval));
 349         }
 350         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num)
 351                 return -EINVAL ;
 352
 353         /* usb endpoint mapping */
 354         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 355         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 356         _rtl_usb_init_tx(hw);
 357         _rtl_usb_init_rx(hw);
 358         return err;
 359 }
 360
 361 static int _rtl_usb_init_sw(struct ieee80211_hw *hw)
 362 {
 363         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 364         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 365         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 366         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 367
 368         rtlhal->hw = hw;
 369         ppsc->inactiveps = false;
 370         ppsc->leisure_ps = false;
 371         ppsc->fwctrl_lps = false;
 372         ppsc->reg_fwctrl_lps = 3;
 373         ppsc->reg_max_lps_awakeintvl = 5;
 374         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 375
 376          /* IBSS */
 377         mac->beacon_interval = 100;
 378
 379          /* AMPDU */
 380         mac->min_space_cfg = 0;
 381         mac->max_mss_density = 0;
 382
 383         /* set sane AMPDU defaults */
 384         mac->current_ampdu_density = 7;
 385         mac->current_ampdu_factor = 3;
 386
 387         /* QOS */
 388         rtlusb->acm_method = eAcmWay2_SW;
 389
 390         /* IRQ */
 391         /* HIMR - turn all on */
 392         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 393         /* HIMR_EX - turn all on */
 394         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 395         rtlusb->disableHWSM =  true;
 396         return 0;
 397 }
 398
 399 #define __RADIO_TAP_SIZE_RSV    32
 400
 401 static void _rtl_rx_completed(struct urb *urb);
 402
 403 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
 404                                         struct rtl_usb *rtlusb,
 405                                         struct urb *urb,
 406                                         gfp_t gfp_mask)
 407 {
 408         struct sk_buff *skb;
 409         struct rtl_priv *rtlpriv = rtl_priv(hw);
 410
 411         skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
 412                                gfp_mask);
 413         if (!skb) {
 414                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 415                          ("Failed to __dev_alloc_skb!!\n"))
 416                 return ERR_PTR(-ENOMEM);
 417         }
 418
 419         /* reserve some space for mac80211's radiotap */
 420         skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 421         usb_fill_bulk_urb(urb, rtlusb->udev,
 422                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 423                           skb->data, min(skb_tailroom(skb),
 424                           (int)rtlusb->rx_max_size),
 425                           _rtl_rx_completed, skb);
 426
 427         _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 428         return skb;
 429 }
 430
 431 #undef __RADIO_TAP_SIZE_RSV
 432
 433 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 434                                     struct sk_buff *skb)
 435 {
 436         struct rtl_priv *rtlpriv = rtl_priv(hw);
 437         u8 *rxdesc = skb->data;
 438         struct ieee80211_hdr *hdr;
 439         bool unicast = false;
 440         __le16 fc;
 441         struct ieee80211_rx_status rx_status = {0};
 442         struct rtl_stats stats = {
 443                 .signal = 0,
 444                 .noise = -98,
 445                 .rate = 0,
 446         };
 447
 448         skb_pull(skb, RTL_RX_DESC_SIZE);
 449         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 450         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 451         hdr = (struct ieee80211_hdr *)(skb->data);
 452         fc = hdr->frame_control;
 453         if (!stats.crc) {
 454                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 455
 456                 if (is_broadcast_ether_addr(hdr->addr1)) {
 457                         /*TODO*/;
 458                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 459                         /*TODO*/
 460                 } else {
 461                         unicast = true;
 462                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 463                 }
 464
 465                 rtl_is_special_data(hw, skb, false);
 466
 467                 if (ieee80211_is_data(fc)) {
 468                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 469
 470                         if (unicast)
 471                                 rtlpriv->link_info.num_rx_inperiod++;
 472                 }
 473         }
 474 }
 475
 476 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 477                                       struct sk_buff *skb)
 478 {
 479         struct rtl_priv *rtlpriv = rtl_priv(hw);
 480         u8 *rxdesc = skb->data;
 481         struct ieee80211_hdr *hdr;
 482         bool unicast = false;
 483         __le16 fc;
 484         struct ieee80211_rx_status rx_status = {0};
 485         struct rtl_stats stats = {
 486                 .signal = 0,
 487                 .noise = -98,
 488                 .rate = 0,
 489         };
 490
 491         skb_pull(skb, RTL_RX_DESC_SIZE);
 492         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 493         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 494         hdr = (struct ieee80211_hdr *)(skb->data);
 495         fc = hdr->frame_control;
 496         if (!stats.crc) {
 497                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 498
 499                 if (is_broadcast_ether_addr(hdr->addr1)) {
 500                         /*TODO*/;
 501                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 502                         /*TODO*/
 503                 } else {
 504                         unicast = true;
 505                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 506                 }
 507
 508                 rtl_is_special_data(hw, skb, false);
 509
 510                 if (ieee80211_is_data(fc)) {
 511                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 512
 513                         if (unicast)
 514                                 rtlpriv->link_info.num_rx_inperiod++;
 515                 }
 516                 if (likely(rtl_action_proc(hw, skb, false))) {
 517                         struct sk_buff *uskb = NULL;
 518                         u8 *pdata;
 519
 520                         uskb = dev_alloc_skb(skb->len + 128);
 521                         memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 522                                sizeof(rx_status));
 523                         pdata = (u8 *)skb_put(uskb, skb->len);
 524                         memcpy(pdata, skb->data, skb->len);
 525                         dev_kfree_skb_any(skb);
 526                         ieee80211_rx_irqsafe(hw, uskb);
 527                 } else {
 528                         dev_kfree_skb_any(skb);
 529                 }
 530         }
 531 }
 532
 533 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 534 {
 535         struct sk_buff *_skb;
 536         struct sk_buff_head rx_queue;
 537         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 538
 539         skb_queue_head_init(&rx_queue);
 540         if (rtlusb->usb_rx_segregate_hdl)
 541                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 542         WARN_ON(skb_queue_empty(&rx_queue));
 543         while (!skb_queue_empty(&rx_queue)) {
 544                 _skb = skb_dequeue(&rx_queue);
 545                 _rtl_usb_rx_process_agg(hw, skb);
 546                 ieee80211_rx_irqsafe(hw, skb);
 547         }
 548 }
 549
 550 static void _rtl_rx_completed(struct urb *_urb)
 551 {
 552         struct sk_buff *skb = (struct sk_buff *)_urb->context;
 553         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 554         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 555         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 556         struct rtl_priv *rtlpriv = rtl_priv(hw);
 557         int err = 0;
 558
 559         if (unlikely(IS_USB_STOP(rtlusb)))
 560                 goto free;
 561
 562         if (likely(0 == _urb->status)) {
 563                 /* If this code were moved to work queue, would CPU
 564                  * utilization be improved?  NOTE: We shall allocate another skb
 565                  * and reuse the original one.
 566                  */
 567                 skb_put(skb, _urb->actual_length);
 568
 569                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 570                         struct sk_buff *_skb;
 571                         _rtl_usb_rx_process_noagg(hw, skb);
 572                         _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
 573                         if (IS_ERR(_skb)) {
 574                                 err = PTR_ERR(_skb);
 575                                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 576                                         ("Can't allocate skb for bulk IN!\n"));
 577                                 return;
 578                         }
 579                         skb = _skb;
 580                 } else{
 581                         /* TO DO */
 582                         _rtl_rx_pre_process(hw, skb);
 583                         printk(KERN_ERR "rtlwifi: rx agg not supported\n");
 584                 }
 585                 goto resubmit;
 586         }
 587
 588         switch (_urb->status) {
 589         /* disconnect */
 590         case -ENOENT:
 591         case -ECONNRESET:
 592         case -ENODEV:
 593         case -ESHUTDOWN:
 594                 goto free;
 595         default:
 596                 break;
 597         }
 598
 599 resubmit:
 600         skb_reset_tail_pointer(skb);
 601         skb_trim(skb, 0);
 602
 603         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 604         err = usb_submit_urb(_urb, GFP_ATOMIC);
 605         if (unlikely(err)) {
 606                 usb_unanchor_urb(_urb);
 607                 goto free;
 608         }
 609         return;
 610
 611 free:
 612         dev_kfree_skb_irq(skb);
 613 }
 614
 615 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 616 {
 617         struct urb *urb;
 618         struct sk_buff *skb;
 619         int err;
 620         int i;
 621         struct rtl_priv *rtlpriv = rtl_priv(hw);
 622         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 623
 624         WARN_ON(0 == rtlusb->rx_urb_num);
 625         /* 1600 == 1514 + max WLAN header + rtk info */
 626         WARN_ON(rtlusb->rx_max_size < 1600);
 627
 628         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 629                 err = -ENOMEM;
 630                 urb = usb_alloc_urb(0, GFP_KERNEL);
 631                 if (!urb) {
 632                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 633                                  ("Failed to alloc URB!!\n"))
 634                         goto err_out;
 635                 }
 636
 637                 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 638                 if (IS_ERR(skb)) {
 639                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 640                                  ("Failed to prep_rx_urb!!\n"))
 641                         err = PTR_ERR(skb);
 642                         goto err_out;
 643                 }
 644
 645                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 646                 err = usb_submit_urb(urb, GFP_KERNEL);
 647                 if (err)
 648                         goto err_out;
 649                 usb_free_urb(urb);
 650         }
 651         return 0;
 652
 653 err_out:
 654         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 655         return err;
 656 }
 657
 658 static int rtl_usb_start(struct ieee80211_hw *hw)
 659 {
 660         int err;
 661         struct rtl_priv *rtlpriv = rtl_priv(hw);
 662         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 663         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 664
 665         err = rtlpriv->cfg->ops->hw_init(hw);
 666         rtl_init_rx_config(hw);
 667
 668         /* Enable software */
 669         SET_USB_START(rtlusb);
 670         /* should after adapter start and interrupt enable. */
 671         set_hal_start(rtlhal);
 672
 673         /* Start bulk IN */
 674         _rtl_usb_receive(hw);
 675
 676         return err;
 677 }
 678 /**
 679  *
 680  *
 681  */
 682
 683 /*=======================  tx =========================================*/
 684 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 685 {
 686         u32 i;
 687         struct sk_buff *_skb;
 688         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 689         struct ieee80211_tx_info *txinfo;
 690
 691         SET_USB_STOP(rtlusb);
 692
 693         /* clean up rx stuff. */
 694         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 695
 696         /* clean up tx stuff */
 697         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 698                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 699                         rtlusb->usb_tx_cleanup(hw, _skb);
 700                         txinfo = IEEE80211_SKB_CB(_skb);
 701                         ieee80211_tx_info_clear_status(txinfo);
 702                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 703                         ieee80211_tx_status_irqsafe(hw, _skb);
 704                 }
 705                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 706         }
 707         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 708 }
 709
 710 /**
 711  *
 712  * We may add some struct into struct rtl_usb later. Do deinit here.
 713  *
 714  */
 715 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 716 {
 717         rtl_usb_cleanup(hw);
 718 }
 719
 720 static void rtl_usb_stop(struct ieee80211_hw *hw)
 721 {
 722         struct rtl_priv *rtlpriv = rtl_priv(hw);
 723         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 724         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 725
 726         /* should after adapter start and interrupt enable. */
 727         set_hal_stop(rtlhal);
 728         /* Enable software */
 729         SET_USB_STOP(rtlusb);
 730         rtl_usb_deinit(hw);
 731         rtlpriv->cfg->ops->hw_disable(hw);
 732 }
 733
 734 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 735 {
 736         int err;
 737         struct rtl_priv *rtlpriv = rtl_priv(hw);
 738         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 739
 740         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 741         err = usb_submit_urb(_urb, GFP_ATOMIC);
 742         if (err < 0) {
 743                 struct sk_buff *skb;
 744
 745                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 746                          ("Failed to submit urb.\n"));
 747                 usb_unanchor_urb(_urb);
 748                 skb = (struct sk_buff *)_urb->context;
 749                 kfree_skb(skb);
 750         }
 751         usb_free_urb(_urb);
 752 }
 753
 754 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 755                         struct sk_buff *skb)
 756 {
 757         struct rtl_priv *rtlpriv = rtl_priv(hw);
 758         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 759         struct ieee80211_tx_info *txinfo;
 760
 761         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 762         skb_pull(skb, RTL_TX_HEADER_SIZE);
 763         txinfo = IEEE80211_SKB_CB(skb);
 764         ieee80211_tx_info_clear_status(txinfo);
 765         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 766
 767         if (urb->status) {
 768                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 769                          ("Urb has error status 0x%X\n", urb->status));
 770                 goto out;
 771         }
 772         /*  TODO:       statistics */
 773 out:
 774         ieee80211_tx_status_irqsafe(hw, skb);
 775         return urb->status;
 776 }
 777
 778 static void _rtl_tx_complete(struct urb *urb)
 779 {
 780         struct sk_buff *skb = (struct sk_buff *)urb->context;
 781         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 782         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 783         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 784         int err;
 785
 786         if (unlikely(IS_USB_STOP(rtlusb)))
 787                 return;
 788         err = _usb_tx_post(hw, urb, skb);
 789         if (err) {
 790                 /* Ignore error and keep issuiing other urbs */
 791                 return;
 792         }
 793 }
 794
 795 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 796                                 struct sk_buff *skb, u32 ep_num)
 797 {
 798         struct rtl_priv *rtlpriv = rtl_priv(hw);
 799         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 800         struct urb *_urb;
 801
 802         WARN_ON(NULL == skb);
 803         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 804         if (!_urb) {
 805                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 806                          ("Can't allocate URB for bulk out!\n"));
 807                 kfree_skb(skb);
 808                 return NULL;
 809         }
 810         _rtl_install_trx_info(rtlusb, skb, ep_num);
 811         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 812                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 813         _urb->transfer_flags |= URB_ZERO_PACKET;
 814         return _urb;
 815 }
 816
 817 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 818                        enum rtl_txq qnum)
 819 {
 820         struct rtl_priv *rtlpriv = rtl_priv(hw);
 821         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 822         u32 ep_num;
 823         struct urb *_urb = NULL;
 824         struct sk_buff *_skb = NULL;
 825         struct sk_buff_head *skb_list;
 826         struct usb_anchor *urb_list;
 827
 828         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 829         if (unlikely(IS_USB_STOP(rtlusb))) {
 830                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 831                          ("USB device is stopping...\n"));
 832                 kfree_skb(skb);
 833                 return;
 834         }
 835         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 836         skb_list = &rtlusb->tx_skb_queue[ep_num];
 837         _skb = skb;
 838         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 839         if (unlikely(!_urb)) {
 840                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 841                          ("Can't allocate urb. Drop skb!\n"));
 842                 return;
 843         }
 844         urb_list = &rtlusb->tx_pending[ep_num];
 845         _rtl_submit_tx_urb(hw, _urb);
 846 }
 847
 848 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
 849                             u16 hw_queue)
 850 {
 851         struct rtl_priv *rtlpriv = rtl_priv(hw);
 852         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 853         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 854         struct rtl_tx_desc *pdesc = NULL;
 855         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 856         __le16 fc = hdr->frame_control;
 857         u8 *pda_addr = hdr->addr1;
 858         /* ssn */
 859         u8 *qc = NULL;
 860         u8 tid = 0;
 861         u16 seq_number = 0;
 862
 863         if (ieee80211_is_mgmt(fc))
 864                 rtl_tx_mgmt_proc(hw, skb);
 865         rtl_action_proc(hw, skb, true);
 866         if (is_multicast_ether_addr(pda_addr))
 867                 rtlpriv->stats.txbytesmulticast += skb->len;
 868         else if (is_broadcast_ether_addr(pda_addr))
 869                 rtlpriv->stats.txbytesbroadcast += skb->len;
 870         else
 871                 rtlpriv->stats.txbytesunicast += skb->len;
 872         if (ieee80211_is_data_qos(fc)) {
 873                 qc = ieee80211_get_qos_ctl(hdr);
 874                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 875                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 876                              IEEE80211_SCTL_SEQ) >> 4;
 877                 seq_number += 1;
 878                 seq_number <<= 4;
 879         }
 880         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
 881                                         hw_queue);
 882         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 883                 if (qc)
 884                         mac->tids[tid].seq_number = seq_number;
 885         }
 886         if (ieee80211_is_data(fc))
 887                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 888 }
 889
 890 static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 891 {
 892         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 893         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 894         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 895         __le16 fc = hdr->frame_control;
 896         u16 hw_queue;
 897
 898         if (unlikely(is_hal_stop(rtlhal)))
 899                 goto err_free;
 900         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 901         _rtl_usb_tx_preprocess(hw, skb, hw_queue);
 902         _rtl_usb_transmit(hw, skb, hw_queue);
 903         return NETDEV_TX_OK;
 904
 905 err_free:
 906         dev_kfree_skb_any(skb);
 907         return NETDEV_TX_OK;
 908 }
 909
 910 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 911                                         struct sk_buff *skb)
 912 {
 913         return false;
 914 }
 915
 916 static struct rtl_intf_ops rtl_usb_ops = {
 917         .adapter_start = rtl_usb_start,
 918         .adapter_stop = rtl_usb_stop,
 919         .adapter_tx = rtl_usb_tx,
 920         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 921 };
 922
 923 int __devinit rtl_usb_probe(struct usb_interface *intf,
 924                         const struct usb_device_id *id)
 925 {
 926         int err;
 927         struct ieee80211_hw *hw = NULL;
 928         struct rtl_priv *rtlpriv = NULL;
 929         struct usb_device       *udev;
 930         struct rtl_usb_priv *usb_priv;
 931
 932         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 933                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 934         if (!hw) {
 935                 RT_ASSERT(false, ("%s : ieee80211 alloc failed\n", __func__));
 936                 return -ENOMEM;
 937         }
 938         rtlpriv = hw->priv;
 939         SET_IEEE80211_DEV(hw, &intf->dev);
 940         udev = interface_to_usbdev(intf);
 941         usb_get_dev(udev);
 942         usb_priv = rtl_usbpriv(hw);
 943         memset(usb_priv, 0, sizeof(*usb_priv));
 944         usb_priv->dev.intf = intf;
 945         usb_priv->dev.udev = udev;
 946         usb_set_intfdata(intf, hw);
 947         /* init cfg & intf_ops */
 948         rtlpriv->rtlhal.interface = INTF_USB;
 949         rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
 950         rtlpriv->intf_ops = &rtl_usb_ops;
 951         rtl_dbgp_flag_init(hw);
 952         /* Init IO handler */
 953         _rtl_usb_io_handler_init(&udev->dev, hw);
 954         rtlpriv->cfg->ops->read_chip_version(hw);
 955         /*like read eeprom and so on */
 956         rtlpriv->cfg->ops->read_eeprom_info(hw);
 957         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
 958                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 959                          ("Can't init_sw_vars.\n"));
 960                 goto error_out;
 961         }
 962         rtlpriv->cfg->ops->init_sw_leds(hw);
 963         err = _rtl_usb_init(hw);
 964         err = _rtl_usb_init_sw(hw);
 965         /* Init mac80211 sw */
 966         err = rtl_init_core(hw);
 967         if (err) {
 968                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 969                          ("Can't allocate sw for mac80211.\n"));
 970                 goto error_out;
 971         }
 972
 973         /*init rfkill */
 974         /* rtl_init_rfkill(hw); */
 975
 976         err = ieee80211_register_hw(hw);
 977         if (err) {
 978                 RT_TRACE(rtlpriv, COMP_INIT, DBG_EMERG,
 979                          ("Can't register mac80211 hw.\n"));
 980                 goto error_out;
 981         } else {
 982                 rtlpriv->mac80211.mac80211_registered = 1;
 983         }
 984         set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
 985         return 0;
 986 error_out:
 987         rtl_deinit_core(hw);
 988         _rtl_usb_io_handler_release(hw);
 989         ieee80211_free_hw(hw);
 990         usb_put_dev(udev);
 991         return -ENODEV;
 992 }
 993 EXPORT_SYMBOL(rtl_usb_probe);
 994
 995 void rtl_usb_disconnect(struct usb_interface *intf)
 996 {
 997         struct ieee80211_hw *hw = usb_get_intfdata(intf);
 998         struct rtl_priv *rtlpriv = rtl_priv(hw);
 999         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1000         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1001
1002         if (unlikely(!rtlpriv))
1003                 return;
1004         /*ieee80211_unregister_hw will call ops_stop */
1005         if (rtlmac->mac80211_registered == 1) {
1006                 ieee80211_unregister_hw(hw);
1007                 rtlmac->mac80211_registered = 0;
1008         } else {
1009                 rtl_deinit_deferred_work(hw);
1010                 rtlpriv->intf_ops->adapter_stop(hw);
1011         }
1012         /*deinit rfkill */
1013         /* rtl_deinit_rfkill(hw); */
1014         rtl_usb_deinit(hw);
1015         rtl_deinit_core(hw);
1016         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1017         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1018         _rtl_usb_io_handler_release(hw);
1019         usb_put_dev(rtlusb->udev);
1020         usb_set_intfdata(intf, NULL);
1021         ieee80211_free_hw(hw);
1022 }
1023 EXPORT_SYMBOL(rtl_usb_disconnect);
1024
1025 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1026 {
1027         return 0;
1028 }
1029 EXPORT_SYMBOL(rtl_usb_suspend);
1030
1031 int rtl_usb_resume(struct usb_interface *pusb_intf)
1032 {
1033         return 0;
1034 }
1035 EXPORT_SYMBOL(rtl_usb_resume);