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                 /* free dr */
  47                 kfree(urb->setup_packet);
  48                 /* free databuf */
  49                 kfree(urb->transfer_buffer);
  50         }
  51 }
  52
  53 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  54                                           u16 value, u16 index, void *pdata,
  55                                           u16 len)
  56 {
  57         int rc;
  58         unsigned int pipe;
  59         u8 reqtype;
  60         struct usb_ctrlrequest *dr;
  61         struct urb *urb;
  62         const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
  63         u8 *databuf;
  64
  65         if (WARN_ON_ONCE(len > databuf_maxlen))
  66                 len = databuf_maxlen;
  67
  68         pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  69         reqtype =  REALTEK_USB_VENQT_WRITE;
  70
  71         dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
  72         if (!dr)
  73                 return -ENOMEM;
  74
  75         databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
  76         if (!databuf) {
  77                 kfree(dr);
  78                 return -ENOMEM;
  79         }
  80
  81         urb = usb_alloc_urb(0, GFP_ATOMIC);
  82         if (!urb) {
  83                 kfree(databuf);
  84                 kfree(dr);
  85                 return -ENOMEM;
  86         }
  87
  88         dr->bRequestType = reqtype;
  89         dr->bRequest = request;
  90         dr->wValue = cpu_to_le16(value);
  91         dr->wIndex = cpu_to_le16(index);
  92         dr->wLength = cpu_to_le16(len);
  93         /* data are already in little-endian order */
  94         memcpy(databuf, pdata, len);
  95         usb_fill_control_urb(urb, udev, pipe,
  96                              (unsigned char *)dr, databuf, len,
  97                              usbctrl_async_callback, NULL);
  98         rc = usb_submit_urb(urb, GFP_ATOMIC);
  99         if (rc < 0) {
 100                 kfree(databuf);
 101                 kfree(dr);
 102         }
 103         usb_free_urb(urb);
 104         return rc;
 105 }
 106
 107 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
 108                                         u16 value, u16 index, void *pdata,
 109                                         u16 len)
 110 {
 111         unsigned int pipe;
 112         int status;
 113         u8 reqtype;
 114         int vendorreq_times = 0;
 115         static int count;
 116
 117         pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 118         reqtype =  REALTEK_USB_VENQT_READ;
 119
 120         do {
 121                 status = usb_control_msg(udev, pipe, request, reqtype, value,
 122                                          index, pdata, len, 0); /*max. timeout*/
 123                 if (status < 0) {
 124                         /* firmware download is checksumed, don't retry */
 125                         if ((value >= FW_8192C_START_ADDRESS &&
 126                             value <= FW_8192C_END_ADDRESS))
 127                                 break;
 128                 } else {
 129                         break;
 130                 }
 131         } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
 132
 133         if (status < 0 && count++ < 4)
 134                 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 135                        value, status, *(u32 *)pdata);
 136         return status;
 137 }
 138
 139 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 140 {
 141         struct device *dev = rtlpriv->io.dev;
 142         struct usb_device *udev = to_usb_device(dev);
 143         u8 request;
 144         u16 wvalue;
 145         u16 index;
 146         __le32 *data;
 147         unsigned long flags;
 148
 149         spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
 150         if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 151                 rtlpriv->usb_data_index = 0;
 152         data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 153         spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 154         request = REALTEK_USB_VENQT_CMD_REQ;
 155         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 156
 157         wvalue = (u16)addr;
 158         _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 159         return le32_to_cpu(*data);
 160 }
 161
 162 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 163 {
 164         return (u8)_usb_read_sync(rtlpriv, addr, 1);
 165 }
 166
 167 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 168 {
 169         return (u16)_usb_read_sync(rtlpriv, addr, 2);
 170 }
 171
 172 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 173 {
 174         return _usb_read_sync(rtlpriv, addr, 4);
 175 }
 176
 177 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 178                              u16 len)
 179 {
 180         u8 request;
 181         u16 wvalue;
 182         u16 index;
 183         __le32 data;
 184
 185         request = REALTEK_USB_VENQT_CMD_REQ;
 186         index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 187         wvalue = (u16)(addr&0x0000ffff);
 188         data = cpu_to_le32(val);
 189         _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 190                                        len);
 191 }
 192
 193 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 194 {
 195         struct device *dev = rtlpriv->io.dev;
 196
 197         _usb_write_async(to_usb_device(dev), addr, val, 1);
 198 }
 199
 200 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 201 {
 202         struct device *dev = rtlpriv->io.dev;
 203
 204         _usb_write_async(to_usb_device(dev), addr, val, 2);
 205 }
 206
 207 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 208 {
 209         struct device *dev = rtlpriv->io.dev;
 210
 211         _usb_write_async(to_usb_device(dev), addr, val, 4);
 212 }
 213
 214 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
 215                              u16 len)
 216 {
 217         struct device *dev = rtlpriv->io.dev;
 218         struct usb_device *udev = to_usb_device(dev);
 219         u8 request = REALTEK_USB_VENQT_CMD_REQ;
 220         u8 reqtype =  REALTEK_USB_VENQT_WRITE;
 221         u16 wvalue;
 222         u16 index = REALTEK_USB_VENQT_CMD_IDX;
 223         int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 224         u8 *buffer;
 225
 226         wvalue = (u16)(addr & 0x0000ffff);
 227         buffer = kmemdup(data, len, GFP_ATOMIC);
 228         if (!buffer)
 229                 return;
 230         usb_control_msg(udev, pipe, request, reqtype, wvalue,
 231                         index, buffer, len, 50);
 232
 233         kfree(buffer);
 234 }
 235
 236 static void _rtl_usb_io_handler_init(struct device *dev,
 237                                      struct ieee80211_hw *hw)
 238 {
 239         struct rtl_priv *rtlpriv = rtl_priv(hw);
 240
 241         rtlpriv->io.dev = dev;
 242         mutex_init(&rtlpriv->io.bb_mutex);
 243         rtlpriv->io.write8_async        = _usb_write8_async;
 244         rtlpriv->io.write16_async       = _usb_write16_async;
 245         rtlpriv->io.write32_async       = _usb_write32_async;
 246         rtlpriv->io.read8_sync          = _usb_read8_sync;
 247         rtlpriv->io.read16_sync         = _usb_read16_sync;
 248         rtlpriv->io.read32_sync         = _usb_read32_sync;
 249         rtlpriv->io.writeN_sync         = _usb_writeN_sync;
 250 }
 251
 252 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 253 {
 254         struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 255
 256         mutex_destroy(&rtlpriv->io.bb_mutex);
 257 }
 258
 259 /**
 260  *
 261  *      Default aggregation handler. Do nothing and just return the oldest skb.
 262  */
 263 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 264                                                   struct sk_buff_head *list)
 265 {
 266         return skb_dequeue(list);
 267 }
 268
 269 #define IS_HIGH_SPEED_USB(udev) \
 270                 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 271
 272 static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 273 {
 274         u32 i;
 275         struct rtl_priv *rtlpriv = rtl_priv(hw);
 276         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 277
 278         rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 279                                                     ? USB_HIGH_SPEED_BULK_SIZE
 280                                                     : USB_FULL_SPEED_BULK_SIZE;
 281
 282         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
 283                  rtlusb->max_bulk_out_size);
 284
 285         for (i = 0; i < __RTL_TXQ_NUM; i++) {
 286                 u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 287                 if (!ep_num) {
 288                         RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 289                                  "Invalid endpoint map setting!\n");
 290                         return -EINVAL;
 291                 }
 292         }
 293
 294         rtlusb->usb_tx_post_hdl =
 295                  rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 296         rtlusb->usb_tx_cleanup  =
 297                  rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 298         rtlusb->usb_tx_aggregate_hdl =
 299                  (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 300                  ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 301                  : &_none_usb_tx_aggregate_hdl;
 302
 303         init_usb_anchor(&rtlusb->tx_submitted);
 304         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 305                 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 306                 init_usb_anchor(&rtlusb->tx_pending[i]);
 307         }
 308         return 0;
 309 }
 310
 311 static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 312 {
 313         struct rtl_priv *rtlpriv = rtl_priv(hw);
 314         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 315         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 316
 317         rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 318         rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 319         rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 320         rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 321         rtlusb->usb_rx_segregate_hdl =
 322                 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 323
 324         pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 325                 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 326         init_usb_anchor(&rtlusb->rx_submitted);
 327         return 0;
 328 }
 329
 330 static int _rtl_usb_init(struct ieee80211_hw *hw)
 331 {
 332         struct rtl_priv *rtlpriv = rtl_priv(hw);
 333         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 334         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 335         int err;
 336         u8 epidx;
 337         struct usb_interface    *usb_intf = rtlusb->intf;
 338         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 339
 340         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 341         for (epidx = 0; epidx < epnums; epidx++) {
 342                 struct usb_endpoint_descriptor *pep_desc;
 343                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 344
 345                 if (usb_endpoint_dir_in(pep_desc))
 346                         rtlusb->in_ep_nums++;
 347                 else if (usb_endpoint_dir_out(pep_desc))
 348                         rtlusb->out_ep_nums++;
 349
 350                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 351                          "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 352                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 353                          pep_desc->bInterval);
 354         }
 355         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 356                 pr_err("Too few input end points found\n");
 357                 return -EINVAL;
 358         }
 359         if (rtlusb->out_ep_nums == 0) {
 360                 pr_err("No output end points found\n");
 361                 return -EINVAL;
 362         }
 363         /* usb endpoint mapping */
 364         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 365         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 366         _rtl_usb_init_tx(hw);
 367         _rtl_usb_init_rx(hw);
 368         return err;
 369 }
 370
 371 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 372 {
 373         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 374         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 375         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 376         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 377
 378         rtlhal->hw = hw;
 379         ppsc->inactiveps = false;
 380         ppsc->leisure_ps = false;
 381         ppsc->fwctrl_lps = false;
 382         ppsc->reg_fwctrl_lps = 3;
 383         ppsc->reg_max_lps_awakeintvl = 5;
 384         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 385
 386          /* IBSS */
 387         mac->beacon_interval = 100;
 388
 389          /* AMPDU */
 390         mac->min_space_cfg = 0;
 391         mac->max_mss_density = 0;
 392
 393         /* set sane AMPDU defaults */
 394         mac->current_ampdu_density = 7;
 395         mac->current_ampdu_factor = 3;
 396
 397         /* QOS */
 398         rtlusb->acm_method = eAcmWay2_SW;
 399
 400         /* IRQ */
 401         /* HIMR - turn all on */
 402         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 403         /* HIMR_EX - turn all on */
 404         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 405         rtlusb->disableHWSM =  true;
 406 }
 407
 408 #define __RADIO_TAP_SIZE_RSV    32
 409
 410 static void _rtl_rx_completed(struct urb *urb);
 411
 412 static struct sk_buff *_rtl_prep_rx_urb(struct ieee80211_hw *hw,
 413                                         struct rtl_usb *rtlusb,
 414                                         struct urb *urb,
 415                                         gfp_t gfp_mask)
 416 {
 417         struct sk_buff *skb;
 418         struct rtl_priv *rtlpriv = rtl_priv(hw);
 419
 420         skb = __dev_alloc_skb((rtlusb->rx_max_size + __RADIO_TAP_SIZE_RSV),
 421                                gfp_mask);
 422         if (!skb) {
 423                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 424                          "Failed to __dev_alloc_skb!!\n");
 425                 return ERR_PTR(-ENOMEM);
 426         }
 427
 428         /* reserve some space for mac80211's radiotap */
 429         skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 430         usb_fill_bulk_urb(urb, rtlusb->udev,
 431                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 432                           skb->data, min(skb_tailroom(skb),
 433                           (int)rtlusb->rx_max_size),
 434                           _rtl_rx_completed, skb);
 435
 436         _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 437         return skb;
 438 }
 439
 440 #undef __RADIO_TAP_SIZE_RSV
 441
 442 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 443                                     struct sk_buff *skb)
 444 {
 445         struct rtl_priv *rtlpriv = rtl_priv(hw);
 446         u8 *rxdesc = skb->data;
 447         struct ieee80211_hdr *hdr;
 448         bool unicast = false;
 449         __le16 fc;
 450         struct ieee80211_rx_status rx_status = {0};
 451         struct rtl_stats stats = {
 452                 .signal = 0,
 453                 .noise = -98,
 454                 .rate = 0,
 455         };
 456
 457         skb_pull(skb, RTL_RX_DESC_SIZE);
 458         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 459         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 460         hdr = (struct ieee80211_hdr *)(skb->data);
 461         fc = hdr->frame_control;
 462         if (!stats.crc) {
 463                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 464
 465                 if (is_broadcast_ether_addr(hdr->addr1)) {
 466                         /*TODO*/;
 467                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 468                         /*TODO*/
 469                 } else {
 470                         unicast = true;
 471                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 472                 }
 473
 474                 rtl_is_special_data(hw, skb, false);
 475
 476                 if (ieee80211_is_data(fc)) {
 477                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 478
 479                         if (unicast)
 480                                 rtlpriv->link_info.num_rx_inperiod++;
 481                 }
 482         }
 483 }
 484
 485 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 486                                       struct sk_buff *skb)
 487 {
 488         struct rtl_priv *rtlpriv = rtl_priv(hw);
 489         u8 *rxdesc = skb->data;
 490         struct ieee80211_hdr *hdr;
 491         bool unicast = false;
 492         __le16 fc;
 493         struct ieee80211_rx_status rx_status = {0};
 494         struct rtl_stats stats = {
 495                 .signal = 0,
 496                 .noise = -98,
 497                 .rate = 0,
 498         };
 499
 500         skb_pull(skb, RTL_RX_DESC_SIZE);
 501         rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 502         skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 503         hdr = (struct ieee80211_hdr *)(skb->data);
 504         fc = hdr->frame_control;
 505         if (!stats.crc) {
 506                 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 507
 508                 if (is_broadcast_ether_addr(hdr->addr1)) {
 509                         /*TODO*/;
 510                 } else if (is_multicast_ether_addr(hdr->addr1)) {
 511                         /*TODO*/
 512                 } else {
 513                         unicast = true;
 514                         rtlpriv->stats.rxbytesunicast +=  skb->len;
 515                 }
 516
 517                 rtl_is_special_data(hw, skb, false);
 518
 519                 if (ieee80211_is_data(fc)) {
 520                         rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 521
 522                         if (unicast)
 523                                 rtlpriv->link_info.num_rx_inperiod++;
 524                 }
 525                 if (likely(rtl_action_proc(hw, skb, false))) {
 526                         struct sk_buff *uskb = NULL;
 527                         u8 *pdata;
 528
 529                         uskb = dev_alloc_skb(skb->len + 128);
 530                         if (uskb) {     /* drop packet on allocation failure */
 531                                 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 532                                        sizeof(rx_status));
 533                                 pdata = (u8 *)skb_put(uskb, skb->len);
 534                                 memcpy(pdata, skb->data, skb->len);
 535                                 ieee80211_rx_irqsafe(hw, uskb);
 536                         }
 537                         dev_kfree_skb_any(skb);
 538                 } else {
 539                         dev_kfree_skb_any(skb);
 540                 }
 541         }
 542 }
 543
 544 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 545 {
 546         struct sk_buff *_skb;
 547         struct sk_buff_head rx_queue;
 548         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 549
 550         skb_queue_head_init(&rx_queue);
 551         if (rtlusb->usb_rx_segregate_hdl)
 552                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 553         WARN_ON(skb_queue_empty(&rx_queue));
 554         while (!skb_queue_empty(&rx_queue)) {
 555                 _skb = skb_dequeue(&rx_queue);
 556                 _rtl_usb_rx_process_agg(hw, _skb);
 557                 ieee80211_rx_irqsafe(hw, _skb);
 558         }
 559 }
 560
 561 static void _rtl_rx_completed(struct urb *_urb)
 562 {
 563         struct sk_buff *skb = (struct sk_buff *)_urb->context;
 564         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 565         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 566         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 567         struct rtl_priv *rtlpriv = rtl_priv(hw);
 568         int err = 0;
 569
 570         if (unlikely(IS_USB_STOP(rtlusb)))
 571                 goto free;
 572
 573         if (likely(0 == _urb->status)) {
 574                 /* If this code were moved to work queue, would CPU
 575                  * utilization be improved?  NOTE: We shall allocate another skb
 576                  * and reuse the original one.
 577                  */
 578                 skb_put(skb, _urb->actual_length);
 579
 580                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 581                         struct sk_buff *_skb;
 582                         _rtl_usb_rx_process_noagg(hw, skb);
 583                         _skb = _rtl_prep_rx_urb(hw, rtlusb, _urb, GFP_ATOMIC);
 584                         if (IS_ERR(_skb)) {
 585                                 err = PTR_ERR(_skb);
 586                                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 587                                          "Can't allocate skb for bulk IN!\n");
 588                                 return;
 589                         }
 590                         skb = _skb;
 591                 } else{
 592                         /* TO DO */
 593                         _rtl_rx_pre_process(hw, skb);
 594                         pr_err("rx agg not supported\n");
 595                 }
 596                 goto resubmit;
 597         }
 598
 599         switch (_urb->status) {
 600         /* disconnect */
 601         case -ENOENT:
 602         case -ECONNRESET:
 603         case -ENODEV:
 604         case -ESHUTDOWN:
 605                 goto free;
 606         default:
 607                 break;
 608         }
 609
 610 resubmit:
 611         skb_reset_tail_pointer(skb);
 612         skb_trim(skb, 0);
 613
 614         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 615         err = usb_submit_urb(_urb, GFP_ATOMIC);
 616         if (unlikely(err)) {
 617                 usb_unanchor_urb(_urb);
 618                 goto free;
 619         }
 620         return;
 621
 622 free:
 623         dev_kfree_skb_irq(skb);
 624 }
 625
 626 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 627 {
 628         struct urb *urb;
 629         struct sk_buff *skb;
 630         int err;
 631         int i;
 632         struct rtl_priv *rtlpriv = rtl_priv(hw);
 633         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 634
 635         WARN_ON(0 == rtlusb->rx_urb_num);
 636         /* 1600 == 1514 + max WLAN header + rtk info */
 637         WARN_ON(rtlusb->rx_max_size < 1600);
 638
 639         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 640                 err = -ENOMEM;
 641                 urb = usb_alloc_urb(0, GFP_KERNEL);
 642                 if (!urb) {
 643                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 644                                  "Failed to alloc URB!!\n");
 645                         goto err_out;
 646                 }
 647
 648                 skb = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 649                 if (IS_ERR(skb)) {
 650                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 651                                  "Failed to prep_rx_urb!!\n");
 652                         err = PTR_ERR(skb);
 653                         usb_free_urb(urb);
 654                         goto err_out;
 655                 }
 656
 657                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 658                 err = usb_submit_urb(urb, GFP_KERNEL);
 659                 if (err)
 660                         goto err_out;
 661                 usb_free_urb(urb);
 662         }
 663         return 0;
 664
 665 err_out:
 666         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 667         return err;
 668 }
 669
 670 static int rtl_usb_start(struct ieee80211_hw *hw)
 671 {
 672         int err;
 673         struct rtl_priv *rtlpriv = rtl_priv(hw);
 674         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 675         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 676
 677         err = rtlpriv->cfg->ops->hw_init(hw);
 678         if (!err) {
 679                 rtl_init_rx_config(hw);
 680
 681                 /* Enable software */
 682                 SET_USB_START(rtlusb);
 683                 /* should after adapter start and interrupt enable. */
 684                 set_hal_start(rtlhal);
 685
 686                 /* Start bulk IN */
 687                 err = _rtl_usb_receive(hw);
 688         }
 689
 690         return err;
 691 }
 692 /**
 693  *
 694  *
 695  */
 696
 697 /*=======================  tx =========================================*/
 698 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 699 {
 700         u32 i;
 701         struct sk_buff *_skb;
 702         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 703         struct ieee80211_tx_info *txinfo;
 704
 705         SET_USB_STOP(rtlusb);
 706
 707         /* clean up rx stuff. */
 708         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 709
 710         /* clean up tx stuff */
 711         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 712                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 713                         rtlusb->usb_tx_cleanup(hw, _skb);
 714                         txinfo = IEEE80211_SKB_CB(_skb);
 715                         ieee80211_tx_info_clear_status(txinfo);
 716                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 717                         ieee80211_tx_status_irqsafe(hw, _skb);
 718                 }
 719                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 720         }
 721         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 722 }
 723
 724 /**
 725  *
 726  * We may add some struct into struct rtl_usb later. Do deinit here.
 727  *
 728  */
 729 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 730 {
 731         rtl_usb_cleanup(hw);
 732 }
 733
 734 static void rtl_usb_stop(struct ieee80211_hw *hw)
 735 {
 736         struct rtl_priv *rtlpriv = rtl_priv(hw);
 737         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 738         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 739
 740         /* should after adapter start and interrupt enable. */
 741         set_hal_stop(rtlhal);
 742         /* Enable software */
 743         SET_USB_STOP(rtlusb);
 744         rtl_usb_deinit(hw);
 745         rtlpriv->cfg->ops->hw_disable(hw);
 746 }
 747
 748 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 749 {
 750         int err;
 751         struct rtl_priv *rtlpriv = rtl_priv(hw);
 752         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 753
 754         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 755         err = usb_submit_urb(_urb, GFP_ATOMIC);
 756         if (err < 0) {
 757                 struct sk_buff *skb;
 758
 759                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 760                          "Failed to submit urb\n");
 761                 usb_unanchor_urb(_urb);
 762                 skb = (struct sk_buff *)_urb->context;
 763                 kfree_skb(skb);
 764         }
 765         usb_free_urb(_urb);
 766 }
 767
 768 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 769                         struct sk_buff *skb)
 770 {
 771         struct rtl_priv *rtlpriv = rtl_priv(hw);
 772         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 773         struct ieee80211_tx_info *txinfo;
 774
 775         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 776         skb_pull(skb, RTL_TX_HEADER_SIZE);
 777         txinfo = IEEE80211_SKB_CB(skb);
 778         ieee80211_tx_info_clear_status(txinfo);
 779         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 780
 781         if (urb->status) {
 782                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 783                          "Urb has error status 0x%X\n", urb->status);
 784                 goto out;
 785         }
 786         /*  TODO:       statistics */
 787 out:
 788         ieee80211_tx_status_irqsafe(hw, skb);
 789         return urb->status;
 790 }
 791
 792 static void _rtl_tx_complete(struct urb *urb)
 793 {
 794         struct sk_buff *skb = (struct sk_buff *)urb->context;
 795         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 796         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 797         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 798         int err;
 799
 800         if (unlikely(IS_USB_STOP(rtlusb)))
 801                 return;
 802         err = _usb_tx_post(hw, urb, skb);
 803         if (err) {
 804                 /* Ignore error and keep issuiing other urbs */
 805                 return;
 806         }
 807 }
 808
 809 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 810                                 struct sk_buff *skb, u32 ep_num)
 811 {
 812         struct rtl_priv *rtlpriv = rtl_priv(hw);
 813         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 814         struct urb *_urb;
 815
 816         WARN_ON(NULL == skb);
 817         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 818         if (!_urb) {
 819                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 820                          "Can't allocate URB for bulk out!\n");
 821                 kfree_skb(skb);
 822                 return NULL;
 823         }
 824         _rtl_install_trx_info(rtlusb, skb, ep_num);
 825         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 826                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 827         _urb->transfer_flags |= URB_ZERO_PACKET;
 828         return _urb;
 829 }
 830
 831 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 832                        enum rtl_txq qnum)
 833 {
 834         struct rtl_priv *rtlpriv = rtl_priv(hw);
 835         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 836         u32 ep_num;
 837         struct urb *_urb = NULL;
 838         struct sk_buff *_skb = NULL;
 839
 840         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 841         if (unlikely(IS_USB_STOP(rtlusb))) {
 842                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 843                          "USB device is stopping...\n");
 844                 kfree_skb(skb);
 845                 return;
 846         }
 847         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 848         _skb = skb;
 849         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 850         if (unlikely(!_urb)) {
 851                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 852                          "Can't allocate urb. Drop skb!\n");
 853                 return;
 854         }
 855         _rtl_submit_tx_urb(hw, _urb);
 856 }
 857
 858 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 859                                    struct ieee80211_sta *sta,
 860                                    struct sk_buff *skb,
 861                                    u16 hw_queue)
 862 {
 863         struct rtl_priv *rtlpriv = rtl_priv(hw);
 864         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 865         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 866         struct rtl_tx_desc *pdesc = NULL;
 867         struct rtl_tcb_desc tcb_desc;
 868         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 869         __le16 fc = hdr->frame_control;
 870         u8 *pda_addr = hdr->addr1;
 871         /* ssn */
 872         u8 *qc = NULL;
 873         u8 tid = 0;
 874         u16 seq_number = 0;
 875
 876         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 877         if (ieee80211_is_auth(fc)) {
 878                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 879                 rtl_ips_nic_on(hw);
 880         }
 881
 882         if (rtlpriv->psc.sw_ps_enabled) {
 883                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 884                     !ieee80211_has_pm(fc))
 885                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 886         }
 887
 888         rtl_action_proc(hw, skb, true);
 889         if (is_multicast_ether_addr(pda_addr))
 890                 rtlpriv->stats.txbytesmulticast += skb->len;
 891         else if (is_broadcast_ether_addr(pda_addr))
 892                 rtlpriv->stats.txbytesbroadcast += skb->len;
 893         else
 894                 rtlpriv->stats.txbytesunicast += skb->len;
 895         if (ieee80211_is_data_qos(fc)) {
 896                 qc = ieee80211_get_qos_ctl(hdr);
 897                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 898                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 899                              IEEE80211_SCTL_SEQ) >> 4;
 900                 seq_number += 1;
 901                 seq_number <<= 4;
 902         }
 903         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
 904                                         hw_queue, &tcb_desc);
 905         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 906                 if (qc)
 907                         mac->tids[tid].seq_number = seq_number;
 908         }
 909         if (ieee80211_is_data(fc))
 910                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 911 }
 912
 913 static int rtl_usb_tx(struct ieee80211_hw *hw,
 914                       struct ieee80211_sta *sta,
 915                       struct sk_buff *skb,
 916                       struct rtl_tcb_desc *dummy)
 917 {
 918         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 919         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 920         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 921         __le16 fc = hdr->frame_control;
 922         u16 hw_queue;
 923
 924         if (unlikely(is_hal_stop(rtlhal)))
 925                 goto err_free;
 926         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 927         _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
 928         _rtl_usb_transmit(hw, skb, hw_queue);
 929         return NETDEV_TX_OK;
 930
 931 err_free:
 932         dev_kfree_skb_any(skb);
 933         return NETDEV_TX_OK;
 934 }
 935
 936 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 937                                         struct ieee80211_sta *sta,
 938                                         struct sk_buff *skb)
 939 {
 940         return false;
 941 }
 942
 943 static struct rtl_intf_ops rtl_usb_ops = {
 944         .adapter_start = rtl_usb_start,
 945         .adapter_stop = rtl_usb_stop,
 946         .adapter_tx = rtl_usb_tx,
 947         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 948 };
 949
 950 int rtl_usb_probe(struct usb_interface *intf,
 951                   const struct usb_device_id *id,
 952                   struct rtl_hal_cfg *rtl_hal_cfg)
 953 {
 954         int err;
 955         struct ieee80211_hw *hw = NULL;
 956         struct rtl_priv *rtlpriv = NULL;
 957         struct usb_device       *udev;
 958         struct rtl_usb_priv *usb_priv;
 959
 960         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 961                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 962         if (!hw) {
 963                 RT_ASSERT(false, "ieee80211 alloc failed\n");
 964                 return -ENOMEM;
 965         }
 966         rtlpriv = hw->priv;
 967         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
 968                                     GFP_KERNEL);
 969         if (!rtlpriv->usb_data)
 970                 return -ENOMEM;
 971
 972         /* this spin lock must be initialized early */
 973         spin_lock_init(&rtlpriv->locks.usb_lock);
 974
 975         rtlpriv->usb_data_index = 0;
 976         init_completion(&rtlpriv->firmware_loading_complete);
 977         SET_IEEE80211_DEV(hw, &intf->dev);
 978         udev = interface_to_usbdev(intf);
 979         usb_get_dev(udev);
 980         usb_priv = rtl_usbpriv(hw);
 981         memset(usb_priv, 0, sizeof(*usb_priv));
 982         usb_priv->dev.intf = intf;
 983         usb_priv->dev.udev = udev;
 984         usb_set_intfdata(intf, hw);
 985         /* init cfg & intf_ops */
 986         rtlpriv->rtlhal.interface = INTF_USB;
 987         rtlpriv->cfg = rtl_hal_cfg;
 988         rtlpriv->intf_ops = &rtl_usb_ops;
 989         rtl_dbgp_flag_init(hw);
 990         /* Init IO handler */
 991         _rtl_usb_io_handler_init(&udev->dev, hw);
 992         rtlpriv->cfg->ops->read_chip_version(hw);
 993         /*like read eeprom and so on */
 994         rtlpriv->cfg->ops->read_eeprom_info(hw);
 995         err = _rtl_usb_init(hw);
 996         if (err)
 997                 goto error_out;
 998         rtl_usb_init_sw(hw);
 999         /* Init mac80211 sw */
1000         err = rtl_init_core(hw);
1001         if (err) {
1002                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1003                          "Can't allocate sw for mac80211\n");
1004                 goto error_out;
1005         }
1006         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1007                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1008                 goto error_out;
1009         }
1010         rtlpriv->cfg->ops->init_sw_leds(hw);
1011
1012         return 0;
1013 error_out:
1014         rtl_deinit_core(hw);
1015         _rtl_usb_io_handler_release(hw);
1016         usb_put_dev(udev);
1017         complete(&rtlpriv->firmware_loading_complete);
1018         return -ENODEV;
1019 }
1020 EXPORT_SYMBOL(rtl_usb_probe);
1021
1022 void rtl_usb_disconnect(struct usb_interface *intf)
1023 {
1024         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1025         struct rtl_priv *rtlpriv = rtl_priv(hw);
1026         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1027         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1028
1029         if (unlikely(!rtlpriv))
1030                 return;
1031
1032         /* just in case driver is removed before firmware callback */
1033         wait_for_completion(&rtlpriv->firmware_loading_complete);
1034         /*ieee80211_unregister_hw will call ops_stop */
1035         if (rtlmac->mac80211_registered == 1) {
1036                 ieee80211_unregister_hw(hw);
1037                 rtlmac->mac80211_registered = 0;
1038         } else {
1039                 rtl_deinit_deferred_work(hw);
1040                 rtlpriv->intf_ops->adapter_stop(hw);
1041         }
1042         /*deinit rfkill */
1043         /* rtl_deinit_rfkill(hw); */
1044         rtl_usb_deinit(hw);
1045         rtl_deinit_core(hw);
1046         kfree(rtlpriv->usb_data);
1047         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1048         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1049         _rtl_usb_io_handler_release(hw);
1050         usb_put_dev(rtlusb->udev);
1051         usb_set_intfdata(intf, NULL);
1052         ieee80211_free_hw(hw);
1053 }
1054 EXPORT_SYMBOL(rtl_usb_disconnect);
1055
1056 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1057 {
1058         return 0;
1059 }
1060 EXPORT_SYMBOL(rtl_usb_suspend);
1061
1062 int rtl_usb_resume(struct usb_interface *pusb_intf)
1063 {
1064         return 0;
1065 }
1066 EXPORT_SYMBOL(rtl_usb_resume);