drivers/net/wireless/rtlwifi/usb.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2012  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 #include "wifi.h"
  29 #include "core.h"
  30 #include "usb.h"
  31 #include "base.h"
  32 #include "ps.h"
  33 #include "rtl8192c/fw_common.h"
  34 #include <linux/export.h>
  35
  36 #define REALTEK_USB_VENQT_READ                  0xC0
  37 #define REALTEK_USB_VENQT_WRITE                 0x40
  38 #define REALTEK_USB_VENQT_CMD_REQ               0x05
  39 #define REALTEK_USB_VENQT_CMD_IDX               0x00
  40
  41 #define MAX_USBCTRL_VENDORREQ_TIMES             10
  42
  43 static void usbctrl_async_callback(struct urb *urb)
  44 {
  45         if (urb)
  46                 kfree(urb->context);
  47 }
  48
  49 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  50                                           u16 value, u16 index, void *pdata,
  51                                           u16 len)
  52 {
  53         int rc;
  54         unsigned int pipe;
  55         u8 reqtype;
  56         struct usb_ctrlrequest *dr;
  57         struct urb *urb;
  58         struct rtl819x_async_write_data {
  59                 u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
  60                 struct usb_ctrlrequest dr;
  61         } *buf;
  62
  63         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  64         reqtype =  REALTEK_USB_VENQT_WRITE;
  65
  66         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
  67         if (!buf)
  68                 return -ENOMEM;
  69
  70         urb = usb_alloc_urb(0, GFP_ATOMIC);
  71         if (!urb) {
  72                 kfree(buf);
  73                 return -ENOMEM;
  74         }
  75
  76         dr = &buf->dr;
  77
  78         dr->bRequestType = reqtype;
  79         dr->bRequest = request;
  80         dr->wValue = cpu_to_le16(value);
  81         dr->wIndex = cpu_to_le16(index);
  82         dr->wLength = cpu_to_le16(len);
  83         /* data are already in little-endian order */
  84         memcpy(buf, pdata, len);
  85         usb_fill_control_urb(urb, udev, pipe,
  86                              (unsigned char *)dr, buf, len,
  87                              usbctrl_async_callback, buf);
  88         rc = usb_submit_urb(urb, GFP_ATOMIC);
  89         if (rc < 0)
  90                 kfree(buf);
  91         usb_free_urb(urb);
  92         return rc;
  93 }
  94
  95 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
  96                                         u16 value, u16 index, void *pdata,
  97                                         u16 len)
  98 {
  99         unsigned int pipe;
 100         int status;
 101         u8 reqtype;
 102         int vendorreq_times = 0;
 103         static int count;
 104
 105         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 106         reqtype =  REALTEK_USB_VENQT_READ;
 107
 108         do {
 109                 status = usb_control_msg(udev, pipe, request, reqtype, value,
 110                                          index, pdata, len, 0); /*max. timeout*/
 111                 if (status < 0) {
 112                         /* firmware download is checksumed, don't retry */
 113                         if ((value >= FW_8192C_START_ADDRESS &&
 114                             value <= FW_8192C_END_ADDRESS))
 115                                 break;
 116                 } else {
 117                         break;
 118                 }
 119         } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
 120
 121         if (status < 0 && count++ < 4)
 122                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 123                        value, status, le32_to_cpu(*(u32 *)pdata));
 124         return status;
 125 }
 126
 127 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 128 {
 129         struct device *dev = rtlpriv->io.dev;
 130         struct usb_device *udev = to_usb_device(dev);
 131         u8 request;
 132         u16 wvalue;
 133         u16 index;
 134         __le32 *data;
 135         unsigned long flags;
 136
 137         spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
 138         if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 139                 rtlpriv->usb_data_index = 0;
 140         data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 141         spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 142         request = REALTEK_USB_VENQT_CMD_REQ;
 143         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 144
 145         wvalue = (u16)addr;
 146         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 147         return le32_to_cpu(*data);
 148 }
 149
 150 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 151 {
 152         return (u8)_usb_read_sync(rtlpriv, addr, 1);
 153 }
 154
 155 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 156 {
 157         return (u16)_usb_read_sync(rtlpriv, addr, 2);
 158 }
 159
 160 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 161 {
 162         return _usb_read_sync(rtlpriv, addr, 4);
 163 }
 164
 165 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 166                              u16 len)
 167 {
 168         u8 request;
 169         u16 wvalue;
 170         u16 index;
 171         __le32 data;
 172
 173         request = REALTEK_USB_VENQT_CMD_REQ;
 174         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 175         wvalue = (u16)(addr&0x0000ffff);
 176         data = cpu_to_le32(val);
 177         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 178                                        len);
 179 }
 180
 181 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 182 {
 183         struct device *dev = rtlpriv->io.dev;
 184
 185         _usb_write_async(to_usb_device(dev), addr, val, 1);
 186 }
 187
 188 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 189 {
 190         struct device *dev = rtlpriv->io.dev;
 191
 192         _usb_write_async(to_usb_device(dev), addr, val, 2);
 193 }
 194
 195 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 196 {
 197         struct device *dev = rtlpriv->io.dev;
 198
 199         _usb_write_async(to_usb_device(dev), addr, val, 4);
 200 }
 201
 202 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
 203                              u16 len)
 204 {
 205         struct device *dev = rtlpriv->io.dev;
 206         struct usb_device *udev = to_usb_device(dev);
 207         u8 request = REALTEK_USB_VENQT_CMD_REQ;
 208         u8 reqtype =  REALTEK_USB_VENQT_WRITE;
 209         u16 wvalue;
 210         u16 index = REALTEK_USB_VENQT_CMD_IDX;
 211         int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 212         u8 *buffer;
 213
 214         wvalue = (u16)(addr & 0x0000ffff);
 215         buffer = kmalloc(len, GFP_ATOMIC);
 216         if (!buffer)
 217                 return;
 218         memcpy(buffer, data, len);
 219         usb_control_msg(udev, pipe, request, reqtype, wvalue,
 220                         index, buffer, len, 50);
 221
 222         kfree(buffer);
 223 }
 224
 225 static void _rtl_usb_io_handler_init(struct device *dev,
 226                                      struct ieee80211_hw *hw)
 227 {
 228         struct rtl_priv *rtlpriv = rtl_priv(hw);
 229
 230         rtlpriv->io.dev = dev;
 231         mutex_init(&rtlpriv->io.bb_mutex);
 232         rtlpriv->io.write8_async        = _usb_write8_async;
 233         rtlpriv->io.write16_async       = _usb_write16_async;
 234         rtlpriv->io.write32_async       = _usb_write32_async;
 235         rtlpriv->io.read8_sync          = _usb_read8_sync;
 236         rtlpriv->io.read16_sync         = _usb_read16_sync;
 237         rtlpriv->io.read32_sync         = _usb_read32_sync;
 238         rtlpriv->io.writeN_sync         = _usb_writeN_sync;
 239 }
 240
 241 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 242 {
 243         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 244
 245         mutex_destroy(&rtlpriv->io.bb_mutex);
 246 }
 247
 248 /**
 249  *
 250  *      Default aggregation handler. Do nothing and just return the oldest skb.
 251  */
 252 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 253                                                   struct sk_buff_head *list)
 254 {
 255         return skb_dequeue(list);
 256 }
 257
 258 #define IS_HIGH_SPEED_USB(udev) \
 259                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 260
 261 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 262 {
 263         u32 i;
 264         struct rtl_priv *rtlpriv = rtl_priv(hw);
 265         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 266
 267         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 268                                                     ? USB_HIGH_SPEED_BULK_SIZE
 269                                                     : USB_FULL_SPEED_BULK_SIZE;
 270
 271         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
 272                  rtlusb->max_bulk_out_size);
 273
 274         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 275                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 276                 if (!ep_num) {
 277                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 278                                  "Invalid endpoint map setting!\n");
 279                         return -EINVAL;
 280                 }
 281         }
 282
 283         rtlusb->usb_tx_post_hdl =
 284                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 285         rtlusb->usb_tx_cleanup  =
 286                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 287         rtlusb->usb_tx_aggregate_hdl =
 288                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 289                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 290                  : &_none_usb_tx_aggregate_hdl;
 291
 292         init_usb_anchor(&rtlusb->tx_submitted);
 293         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 294                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 295                 init_usb_anchor(&rtlusb->tx_pending[i]);
 296         }
 297         return 0;
 298 }
 299
 300 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 301 {
 302         struct rtl_priv *rtlpriv = rtl_priv(hw);
 303         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 304         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 305
 306         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 307         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 308         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 309         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 310         rtlusb->usb_rx_segregate_hdl =
 311                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 312
 313         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 314                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 315         init_usb_anchor(&rtlusb->rx_submitted);
 316         return 0;
 317 }
 318
 319 static int _rtl_usb_init(struct ieee80211_hw *hw)
 320 {
 321         struct rtl_priv *rtlpriv = rtl_priv(hw);
 322         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 323         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 324         int err;
 325         u8 epidx;
 326         struct usb_interface    *usb_intf = rtlusb->intf;
 327         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 328
 329         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 330         for (epidx = 0; epidx < epnums; epidx++) {
 331                 struct usb_endpoint_descriptor *pep_desc;
 332                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 333
 334                 if (usb_endpoint_dir_in(pep_desc))
 335                         rtlusb->in_ep_nums++;
 336                 else if (usb_endpoint_dir_out(pep_desc))
 337                         rtlusb->out_ep_nums++;
 338
 339                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 340                          "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 341                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 342                          pep_desc->bInterval);
 343         }
 344         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 345                 pr_err("Too few input end points found\n");
 346                 return -EINVAL;
 347         }
 348         if (rtlusb->out_ep_nums == 0) {
 349                 pr_err("No output end points found\n");
 350                 return -EINVAL;
 351         }
 352         /* usb endpoint mapping */
 353         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 354         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 355         _rtl_usb_init_tx(hw);
 356         _rtl_usb_init_rx(hw);
 357         return err;
 358 }
 359
 360 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 361 {
 362         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 363         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 364         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 365         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 366
 367         rtlhal->hw = hw;
 368         ppsc->inactiveps = false;
 369         ppsc->leisure_ps = false;
 370         ppsc->fwctrl_lps = false;
 371         ppsc->reg_fwctrl_lps = 3;
 372         ppsc->reg_max_lps_awakeintvl = 5;
 373         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 374
 375          /* IBSS */
 376         mac->beacon_interval = 100;
 377
 378          /* AMPDU */
 379         mac->min_space_cfg = 0;
 380         mac->max_mss_density = 0;
 381
 382         /* set sane AMPDU defaults */
 383         mac->current_ampdu_density = 7;
 384         mac->current_ampdu_factor = 3;
 385
 386         /* QOS */
 387         rtlusb->acm_method = eAcmWay2_SW;
 388
 389         /* IRQ */
 390         /* HIMR - turn all on */
 391         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 392         /* HIMR_EX - turn all on */
 393         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 394         rtlusb->disableHWSM =  true;
 395 }
 396
 397 #define __RADIO_TAP_SIZE_RSV    32
 398
 399 static void _rtl_rx_completed(struct urb *urb);
 400
 401 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
 402                                         struct rtl_usb *rtlusb,
 403                                         struct urb *urb,
 404                                         gfp_t gfp_mask)
 405 {
 406         struct sk_buff *skb;
 407         struct rtl_priv *rtlpriv = rtl_priv(hw);
 408
 409         skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
 410                                gfp_mask);
 411         if (!skb) {
 412                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 413                          "Failed to __dev_alloc_skb!!\n");
 414                 return ERR_PTR(-ENOMEM);
 415         }
 416
 417         /* reserve some space for mac80211's radiotap */
 418         skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 419         usb_fill_bulk_urb(urb, rtlusb->udev,
 420                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 421                           skb->data, min(skb_tailroom(skb),
 422                           (int)rtlusb->rx_max_size),
 423                           _rtl_rx_completed, skb);
 424
 425         _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 426         return skb;
 427 }
 428
 429 #undef __RADIO_TAP_SIZE_RSV
 430
 431 static void _rtl_usb_rx_process_agg(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         }
 472 }
 473
 474 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 475                                       struct sk_buff *skb)
 476 {
 477         struct rtl_priv *rtlpriv = rtl_priv(hw);
 478         u8 *rxdesc = skb->data;
 479         struct ieee80211_hdr *hdr;
 480         bool unicast = false;
 481         __le16 fc;
 482         struct ieee80211_rx_status rx_status = {0};
 483         struct rtl_stats stats = {
 484                 .signal = 0,
 485                 .noise = -98,
 486                 .rate = 0,
 487         };
 488
 489         skb_pull(skb, RTL_RX_DESC_SIZE);
 490         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 491         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 492         hdr = (struct ieee80211_hdr *)(skb->data);
 493         fc = hdr->frame_control;
 494         if (!stats.crc) {
 495                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 496
 497                 if (is_broadcast_ether_addr(hdr->addr1)) {
 498                         /*TODO*/;
 499                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 500                         /*TODO*/
 501                 } else {
 502                         unicast = true;
 503                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 504                 }
 505
 506                 rtl_is_special_data(hw, skb, false);
 507
 508                 if (ieee80211_is_data(fc)) {
 509                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 510
 511                         if (unicast)
 512                                 rtlpriv->link_info.num_rx_inperiod++;
 513                 }
 514                 if (likely(rtl_action_proc(hw, skb, false))) {
 515                         struct sk_buff *uskb = NULL;
 516                         u8 *pdata;
 517
 518                         uskb = dev_alloc_skb(skb->len + 128);
 519                         if (uskb) {     /* drop packet on allocation failure */
 520                                 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 521                                        sizeof(rx_status));
 522                                 pdata = (u8 *)skb_put(uskb, skb->len);
 523                                 memcpy(pdata, skb->data, skb->len);
 524                                 ieee80211_rx_irqsafe(hw, uskb);
 525                         }
 526                         dev_kfree_skb_any(skb);
 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                         pr_err("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         if (!err) {
 667                 rtl_init_rx_config(hw);
 668
 669                 /* Enable software */
 670                 SET_USB_START(rtlusb);
 671                 /* should after adapter start and interrupt enable. */
 672                 set_hal_start(rtlhal);
 673
 674                 /* Start bulk IN */
 675                 _rtl_usb_receive(hw);
 676         }
 677
 678         return err;
 679 }
 680 /**
 681  *
 682  *
 683  */
 684
 685 /*=======================  tx =========================================*/
 686 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 687 {
 688         u32 i;
 689         struct sk_buff *_skb;
 690         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 691         struct ieee80211_tx_info *txinfo;
 692
 693         SET_USB_STOP(rtlusb);
 694
 695         /* clean up rx stuff. */
 696         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 697
 698         /* clean up tx stuff */
 699         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 700                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 701                         rtlusb->usb_tx_cleanup(hw, _skb);
 702                         txinfo = IEEE80211_SKB_CB(_skb);
 703                         ieee80211_tx_info_clear_status(txinfo);
 704                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 705                         ieee80211_tx_status_irqsafe(hw, _skb);
 706                 }
 707                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 708         }
 709         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 710 }
 711
 712 /**
 713  *
 714  * We may add some struct into struct rtl_usb later. Do deinit here.
 715  *
 716  */
 717 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 718 {
 719         rtl_usb_cleanup(hw);
 720 }
 721
 722 static void rtl_usb_stop(struct ieee80211_hw *hw)
 723 {
 724         struct rtl_priv *rtlpriv = rtl_priv(hw);
 725         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 726         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 727
 728         /* should after adapter start and interrupt enable. */
 729         set_hal_stop(rtlhal);
 730         /* Enable software */
 731         SET_USB_STOP(rtlusb);
 732         rtl_usb_deinit(hw);
 733         rtlpriv->cfg->ops->hw_disable(hw);
 734 }
 735
 736 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 737 {
 738         int err;
 739         struct rtl_priv *rtlpriv = rtl_priv(hw);
 740         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 741
 742         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 743         err = usb_submit_urb(_urb, GFP_ATOMIC);
 744         if (err < 0) {
 745                 struct sk_buff *skb;
 746
 747                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 748                          "Failed to submit urb\n");
 749                 usb_unanchor_urb(_urb);
 750                 skb = (struct sk_buff *)_urb->context;
 751                 kfree_skb(skb);
 752         }
 753         usb_free_urb(_urb);
 754 }
 755
 756 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 757                         struct sk_buff *skb)
 758 {
 759         struct rtl_priv *rtlpriv = rtl_priv(hw);
 760         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 761         struct ieee80211_tx_info *txinfo;
 762
 763         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 764         skb_pull(skb, RTL_TX_HEADER_SIZE);
 765         txinfo = IEEE80211_SKB_CB(skb);
 766         ieee80211_tx_info_clear_status(txinfo);
 767         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 768
 769         if (urb->status) {
 770                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 771                          "Urb has error status 0x%X\n", urb->status);
 772                 goto out;
 773         }
 774         /*  TODO:       statistics */
 775 out:
 776         ieee80211_tx_status_irqsafe(hw, skb);
 777         return urb->status;
 778 }
 779
 780 static void _rtl_tx_complete(struct urb *urb)
 781 {
 782         struct sk_buff *skb = (struct sk_buff *)urb->context;
 783         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 784         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 785         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 786         int err;
 787
 788         if (unlikely(IS_USB_STOP(rtlusb)))
 789                 return;
 790         err = _usb_tx_post(hw, urb, skb);
 791         if (err) {
 792                 /* Ignore error and keep issuiing other urbs */
 793                 return;
 794         }
 795 }
 796
 797 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 798                                 struct sk_buff *skb, u32 ep_num)
 799 {
 800         struct rtl_priv *rtlpriv = rtl_priv(hw);
 801         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 802         struct urb *_urb;
 803
 804         WARN_ON(NULL == skb);
 805         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 806         if (!_urb) {
 807                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 808                          "Can't allocate URB for bulk out!\n");
 809                 kfree_skb(skb);
 810                 return NULL;
 811         }
 812         _rtl_install_trx_info(rtlusb, skb, ep_num);
 813         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 814                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 815         _urb->transfer_flags |= URB_ZERO_PACKET;
 816         return _urb;
 817 }
 818
 819 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 820                        enum rtl_txq qnum)
 821 {
 822         struct rtl_priv *rtlpriv = rtl_priv(hw);
 823         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 824         u32 ep_num;
 825         struct urb *_urb = NULL;
 826         struct sk_buff *_skb = NULL;
 827         struct sk_buff_head *skb_list;
 828         struct usb_anchor *urb_list;
 829
 830         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 831         if (unlikely(IS_USB_STOP(rtlusb))) {
 832                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 833                          "USB device is stopping...\n");
 834                 kfree_skb(skb);
 835                 return;
 836         }
 837         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 838         skb_list = &rtlusb->tx_skb_queue[ep_num];
 839         _skb = skb;
 840         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 841         if (unlikely(!_urb)) {
 842                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 843                          "Can't allocate urb. Drop skb!\n");
 844                 return;
 845         }
 846         urb_list = &rtlusb->tx_pending[ep_num];
 847         _rtl_submit_tx_urb(hw, _urb);
 848 }
 849
 850 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, struct sk_buff *skb,
 851                             u16 hw_queue)
 852 {
 853         struct rtl_priv *rtlpriv = rtl_priv(hw);
 854         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 855         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 856         struct rtl_tx_desc *pdesc = NULL;
 857         struct rtl_tcb_desc tcb_desc;
 858         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 859         __le16 fc = hdr->frame_control;
 860         u8 *pda_addr = hdr->addr1;
 861         /* ssn */
 862         u8 *qc = NULL;
 863         u8 tid = 0;
 864         u16 seq_number = 0;
 865
 866         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 867         if (ieee80211_is_auth(fc)) {
 868                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 869                 rtl_ips_nic_on(hw);
 870         }
 871
 872         if (rtlpriv->psc.sw_ps_enabled) {
 873                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 874                     !ieee80211_has_pm(fc))
 875                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 876         }
 877
 878         rtl_action_proc(hw, skb, true);
 879         if (is_multicast_ether_addr(pda_addr))
 880                 rtlpriv->stats.txbytesmulticast += skb->len;
 881         else if (is_broadcast_ether_addr(pda_addr))
 882                 rtlpriv->stats.txbytesbroadcast += skb->len;
 883         else
 884                 rtlpriv->stats.txbytesunicast += skb->len;
 885         if (ieee80211_is_data_qos(fc)) {
 886                 qc = ieee80211_get_qos_ctl(hdr);
 887                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 888                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 889                              IEEE80211_SCTL_SEQ) >> 4;
 890                 seq_number += 1;
 891                 seq_number <<= 4;
 892         }
 893         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, skb,
 894                                         hw_queue, &tcb_desc);
 895         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 896                 if (qc)
 897                         mac->tids[tid].seq_number = seq_number;
 898         }
 899         if (ieee80211_is_data(fc))
 900                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 901 }
 902
 903 static int rtl_usb_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 904                       struct rtl_tcb_desc *dummy)
 905 {
 906         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 907         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 908         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 909         __le16 fc = hdr->frame_control;
 910         u16 hw_queue;
 911
 912         if (unlikely(is_hal_stop(rtlhal)))
 913                 goto err_free;
 914         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 915         _rtl_usb_tx_preprocess(hw, skb, hw_queue);
 916         _rtl_usb_transmit(hw, skb, hw_queue);
 917         return NETDEV_TX_OK;
 918
 919 err_free:
 920         dev_kfree_skb_any(skb);
 921         return NETDEV_TX_OK;
 922 }
 923
 924 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 925                                         struct sk_buff *skb)
 926 {
 927         return false;
 928 }
 929
 930 static struct rtl_intf_ops rtl_usb_ops = {
 931         .adapter_start = rtl_usb_start,
 932         .adapter_stop = rtl_usb_stop,
 933         .adapter_tx = rtl_usb_tx,
 934         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 935 };
 936
 937 int __devinit rtl_usb_probe(struct usb_interface *intf,
 938                         const struct usb_device_id *id)
 939 {
 940         int err;
 941         struct ieee80211_hw *hw = NULL;
 942         struct rtl_priv *rtlpriv = NULL;
 943         struct usb_device       *udev;
 944         struct rtl_usb_priv *usb_priv;
 945
 946         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 947                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 948         if (!hw) {
 949                 RT_ASSERT(false, "ieee80211 alloc failed\n");
 950                 return -ENOMEM;
 951         }
 952         rtlpriv = hw->priv;
 953         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
 954                                     GFP_KERNEL);
 955         if (!rtlpriv->usb_data)
 956                 return -ENOMEM;
 957
 958         /* this spin lock must be initialized early */
 959         spin_lock_init(&rtlpriv->locks.usb_lock);
 960
 961         rtlpriv->usb_data_index = 0;
 962         init_completion(&rtlpriv->firmware_loading_complete);
 963         SET_IEEE80211_DEV(hw, &intf->dev);
 964         udev = interface_to_usbdev(intf);
 965         usb_get_dev(udev);
 966         usb_priv = rtl_usbpriv(hw);
 967         memset(usb_priv, 0, sizeof(*usb_priv));
 968         usb_priv->dev.intf = intf;
 969         usb_priv->dev.udev = udev;
 970         usb_set_intfdata(intf, hw);
 971         /* init cfg & intf_ops */
 972         rtlpriv->rtlhal.interface = INTF_USB;
 973         rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
 974         rtlpriv->intf_ops = &rtl_usb_ops;
 975         rtl_dbgp_flag_init(hw);
 976         /* Init IO handler */
 977         _rtl_usb_io_handler_init(&udev->dev, hw);
 978         rtlpriv->cfg->ops->read_chip_version(hw);
 979         /*like read eeprom and so on */
 980         rtlpriv->cfg->ops->read_eeprom_info(hw);
 981         err = _rtl_usb_init(hw);
 982         if (err)
 983                 goto error_out;
 984         rtl_usb_init_sw(hw);
 985         /* Init mac80211 sw */
 986         err = rtl_init_core(hw);
 987         if (err) {
 988                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 989                          "Can't allocate sw for mac80211\n");
 990                 goto error_out;
 991         }
 992         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
 993                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
 994                 goto error_out;
 995         }
 996         rtlpriv->cfg->ops->init_sw_leds(hw);
 997
 998         return 0;
 999 error_out:
1000         rtl_deinit_core(hw);
1001         _rtl_usb_io_handler_release(hw);
1002         usb_put_dev(udev);
1003         complete(&rtlpriv->firmware_loading_complete);
1004         return -ENODEV;
1005 }
1006 EXPORT_SYMBOL(rtl_usb_probe);
1007
1008 void rtl_usb_disconnect(struct usb_interface *intf)
1009 {
1010         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1011         struct rtl_priv *rtlpriv = rtl_priv(hw);
1012         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1013         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1014
1015         if (unlikely(!rtlpriv))
1016                 return;
1017
1018         /* just in case driver is removed before firmware callback */
1019         wait_for_completion(&rtlpriv->firmware_loading_complete);
1020         /*ieee80211_unregister_hw will call ops_stop */
1021         if (rtlmac->mac80211_registered == 1) {
1022                 ieee80211_unregister_hw(hw);
1023                 rtlmac->mac80211_registered = 0;
1024         } else {
1025                 rtl_deinit_deferred_work(hw);
1026                 rtlpriv->intf_ops->adapter_stop(hw);
1027         }
1028         /*deinit rfkill */
1029         /* rtl_deinit_rfkill(hw); */
1030         rtl_usb_deinit(hw);
1031         rtl_deinit_core(hw);
1032         kfree(rtlpriv->usb_data);
1033         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1034         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1035         _rtl_usb_io_handler_release(hw);
1036         usb_put_dev(rtlusb->udev);
1037         usb_set_intfdata(intf, NULL);
1038         ieee80211_free_hw(hw);
1039 }
1040 EXPORT_SYMBOL(rtl_usb_disconnect);
1041
1042 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1043 {
1044         return 0;
1045 }
1046 EXPORT_SYMBOL(rtl_usb_suspend);
1047
1048 int rtl_usb_resume(struct usb_interface *pusb_intf)
1049 {
1050         return 0;
1051 }
1052 EXPORT_SYMBOL(rtl_usb_resume);