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         init_usb_anchor(&rtlusb->rx_cleanup_urbs);
 328         return 0;
 329 }
 330
 331 static int _rtl_usb_init(struct ieee80211_hw *hw)
 332 {
 333         struct rtl_priv *rtlpriv = rtl_priv(hw);
 334         struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 335         struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 336         int err;
 337         u8 epidx;
 338         struct usb_interface    *usb_intf = rtlusb->intf;
 339         u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 340
 341         rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 342         for (epidx = 0; epidx < epnums; epidx++) {
 343                 struct usb_endpoint_descriptor *pep_desc;
 344                 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 345
 346                 if (usb_endpoint_dir_in(pep_desc))
 347                         rtlusb->in_ep_nums++;
 348                 else if (usb_endpoint_dir_out(pep_desc))
 349                         rtlusb->out_ep_nums++;
 350
 351                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 352                          "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 353                          pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 354                          pep_desc->bInterval);
 355         }
 356         if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 357                 pr_err("Too few input end points found\n");
 358                 return -EINVAL;
 359         }
 360         if (rtlusb->out_ep_nums == 0) {
 361                 pr_err("No output end points found\n");
 362                 return -EINVAL;
 363         }
 364         /* usb endpoint mapping */
 365         err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 366         rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 367         _rtl_usb_init_tx(hw);
 368         _rtl_usb_init_rx(hw);
 369         return err;
 370 }
 371
 372 static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 373 {
 374         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 375         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 376         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 377         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 378
 379         rtlhal->hw = hw;
 380         ppsc->inactiveps = false;
 381         ppsc->leisure_ps = false;
 382         ppsc->fwctrl_lps = false;
 383         ppsc->reg_fwctrl_lps = 3;
 384         ppsc->reg_max_lps_awakeintvl = 5;
 385         ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 386
 387          /* IBSS */
 388         mac->beacon_interval = 100;
 389
 390          /* AMPDU */
 391         mac->min_space_cfg = 0;
 392         mac->max_mss_density = 0;
 393
 394         /* set sane AMPDU defaults */
 395         mac->current_ampdu_density = 7;
 396         mac->current_ampdu_factor = 3;
 397
 398         /* QOS */
 399         rtlusb->acm_method = eAcmWay2_SW;
 400
 401         /* IRQ */
 402         /* HIMR - turn all on */
 403         rtlusb->irq_mask[0] = 0xFFFFFFFF;
 404         /* HIMR_EX - turn all on */
 405         rtlusb->irq_mask[1] = 0xFFFFFFFF;
 406         rtlusb->disableHWSM =  true;
 407 }
 408
 409 static void _rtl_rx_completed(struct urb *urb);
 410
 411 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
 412                               struct urb *urb, gfp_t gfp_mask)
 413 {
 414         struct rtl_priv *rtlpriv = rtl_priv(hw);
 415         void *buf;
 416
 417         buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
 418                                  &urb->transfer_dma);
 419         if (!buf) {
 420                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 421                          "Failed to usb_alloc_coherent!!\n");
 422                 return -ENOMEM;
 423         }
 424
 425         usb_fill_bulk_urb(urb, rtlusb->udev,
 426                           usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 427                           buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
 428         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 429
 430         return 0;
 431 }
 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                         if (uskb) {     /* drop packet on allocation failure */
 522                                 memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
 523                                        sizeof(rx_status));
 524                                 pdata = (u8 *)skb_put(uskb, skb->len);
 525                                 memcpy(pdata, skb->data, skb->len);
 526                                 ieee80211_rx_irqsafe(hw, uskb);
 527                         }
 528                         dev_kfree_skb_any(skb);
 529                 } else {
 530                         dev_kfree_skb_any(skb);
 531                 }
 532         }
 533 }
 534
 535 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 536 {
 537         struct sk_buff *_skb;
 538         struct sk_buff_head rx_queue;
 539         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 540
 541         skb_queue_head_init(&rx_queue);
 542         if (rtlusb->usb_rx_segregate_hdl)
 543                 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 544         WARN_ON(skb_queue_empty(&rx_queue));
 545         while (!skb_queue_empty(&rx_queue)) {
 546                 _skb = skb_dequeue(&rx_queue);
 547                 _rtl_usb_rx_process_agg(hw, _skb);
 548                 ieee80211_rx_irqsafe(hw, _skb);
 549         }
 550 }
 551
 552 #define __RADIO_TAP_SIZE_RSV    32
 553
 554 static void _rtl_rx_completed(struct urb *_urb)
 555 {
 556         struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
 557         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 558         struct rtl_priv *rtlpriv = rtl_priv(hw);
 559         int err = 0;
 560
 561         if (unlikely(IS_USB_STOP(rtlusb)))
 562                 goto free;
 563
 564         if (likely(0 == _urb->status)) {
 565                 struct sk_buff *skb;
 566                 unsigned int size = _urb->actual_length;
 567
 568                 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
 569                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 570                                  "Too short packet from bulk IN! (len: %d)\n",
 571                                  size);
 572                         goto resubmit;
 573                 }
 574
 575                 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV);
 576                 if (!skb) {
 577                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 578                                  "Can't allocate skb for bulk IN!\n");
 579                         goto resubmit;
 580                 }
 581
 582                 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 583
 584                 /* reserve some space for mac80211's radiotap */
 585                 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 586
 587                 memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
 588
 589                 /* TODO: Do further processing in tasklet (queue skbs,
 590                  * schedule tasklet)
 591                  */
 592
 593                 if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 594                         _rtl_usb_rx_process_noagg(hw, skb);
 595                 } else {
 596                         /* TO DO */
 597                         _rtl_rx_pre_process(hw, skb);
 598                         pr_err("rx agg not supported\n");
 599                 }
 600
 601                 goto resubmit;
 602         }
 603
 604         switch (_urb->status) {
 605         /* disconnect */
 606         case -ENOENT:
 607         case -ECONNRESET:
 608         case -ENODEV:
 609         case -ESHUTDOWN:
 610                 goto free;
 611         default:
 612                 break;
 613         }
 614
 615 resubmit:
 616         usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 617         err = usb_submit_urb(_urb, GFP_ATOMIC);
 618         if (unlikely(err)) {
 619                 usb_unanchor_urb(_urb);
 620                 goto free;
 621         }
 622         return;
 623
 624 free:
 625         /* On some architectures, usb_free_coherent must not be called from
 626          * hardirq context. Queue urb to cleanup list.
 627          */
 628         usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
 629 }
 630
 631 #undef __RADIO_TAP_SIZE_RSV
 632
 633 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
 634 {
 635         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 636         struct urb *urb;
 637
 638         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 639
 640         while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
 641                 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 642                                 urb->transfer_buffer, urb->transfer_dma);
 643                 usb_free_urb(urb);
 644         }
 645 }
 646
 647 static int _rtl_usb_receive(struct ieee80211_hw *hw)
 648 {
 649         struct urb *urb;
 650         int err;
 651         int i;
 652         struct rtl_priv *rtlpriv = rtl_priv(hw);
 653         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 654
 655         WARN_ON(0 == rtlusb->rx_urb_num);
 656         /* 1600 == 1514 + max WLAN header + rtk info */
 657         WARN_ON(rtlusb->rx_max_size < 1600);
 658
 659         for (i = 0; i < rtlusb->rx_urb_num; i++) {
 660                 err = -ENOMEM;
 661                 urb = usb_alloc_urb(0, GFP_KERNEL);
 662                 if (!urb) {
 663                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 664                                  "Failed to alloc URB!!\n");
 665                         goto err_out;
 666                 }
 667
 668                 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 669                 if (err < 0) {
 670                         RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 671                                  "Failed to prep_rx_urb!!\n");
 672                         usb_free_urb(urb);
 673                         goto err_out;
 674                 }
 675
 676                 usb_anchor_urb(urb, &rtlusb->rx_submitted);
 677                 err = usb_submit_urb(urb, GFP_KERNEL);
 678                 if (err)
 679                         goto err_out;
 680                 usb_free_urb(urb);
 681         }
 682         return 0;
 683
 684 err_out:
 685         usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 686         _rtl_usb_cleanup_rx(hw);
 687         return err;
 688 }
 689
 690 static int rtl_usb_start(struct ieee80211_hw *hw)
 691 {
 692         int err;
 693         struct rtl_priv *rtlpriv = rtl_priv(hw);
 694         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 695         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 696
 697         err = rtlpriv->cfg->ops->hw_init(hw);
 698         if (!err) {
 699                 rtl_init_rx_config(hw);
 700
 701                 /* Enable software */
 702                 SET_USB_START(rtlusb);
 703                 /* should after adapter start and interrupt enable. */
 704                 set_hal_start(rtlhal);
 705
 706                 /* Start bulk IN */
 707                 err = _rtl_usb_receive(hw);
 708         }
 709
 710         return err;
 711 }
 712 /**
 713  *
 714  *
 715  */
 716
 717 /*=======================  tx =========================================*/
 718 static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 719 {
 720         u32 i;
 721         struct sk_buff *_skb;
 722         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 723         struct ieee80211_tx_info *txinfo;
 724
 725         SET_USB_STOP(rtlusb);
 726
 727         /* clean up rx stuff. */
 728         _rtl_usb_cleanup_rx(hw);
 729
 730         /* clean up tx stuff */
 731         for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 732                 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 733                         rtlusb->usb_tx_cleanup(hw, _skb);
 734                         txinfo = IEEE80211_SKB_CB(_skb);
 735                         ieee80211_tx_info_clear_status(txinfo);
 736                         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 737                         ieee80211_tx_status_irqsafe(hw, _skb);
 738                 }
 739                 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 740         }
 741         usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 742 }
 743
 744 /**
 745  *
 746  * We may add some struct into struct rtl_usb later. Do deinit here.
 747  *
 748  */
 749 static void rtl_usb_deinit(struct ieee80211_hw *hw)
 750 {
 751         rtl_usb_cleanup(hw);
 752 }
 753
 754 static void rtl_usb_stop(struct ieee80211_hw *hw)
 755 {
 756         struct rtl_priv *rtlpriv = rtl_priv(hw);
 757         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 758         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 759
 760         /* should after adapter start and interrupt enable. */
 761         set_hal_stop(rtlhal);
 762         /* Enable software */
 763         SET_USB_STOP(rtlusb);
 764         rtl_usb_deinit(hw);
 765         rtlpriv->cfg->ops->hw_disable(hw);
 766 }
 767
 768 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 769 {
 770         int err;
 771         struct rtl_priv *rtlpriv = rtl_priv(hw);
 772         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 773
 774         usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 775         err = usb_submit_urb(_urb, GFP_ATOMIC);
 776         if (err < 0) {
 777                 struct sk_buff *skb;
 778
 779                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 780                          "Failed to submit urb\n");
 781                 usb_unanchor_urb(_urb);
 782                 skb = (struct sk_buff *)_urb->context;
 783                 kfree_skb(skb);
 784         }
 785         usb_free_urb(_urb);
 786 }
 787
 788 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 789                         struct sk_buff *skb)
 790 {
 791         struct rtl_priv *rtlpriv = rtl_priv(hw);
 792         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 793         struct ieee80211_tx_info *txinfo;
 794
 795         rtlusb->usb_tx_post_hdl(hw, urb, skb);
 796         skb_pull(skb, RTL_TX_HEADER_SIZE);
 797         txinfo = IEEE80211_SKB_CB(skb);
 798         ieee80211_tx_info_clear_status(txinfo);
 799         txinfo->flags |= IEEE80211_TX_STAT_ACK;
 800
 801         if (urb->status) {
 802                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 803                          "Urb has error status 0x%X\n", urb->status);
 804                 goto out;
 805         }
 806         /*  TODO:       statistics */
 807 out:
 808         ieee80211_tx_status_irqsafe(hw, skb);
 809         return urb->status;
 810 }
 811
 812 static void _rtl_tx_complete(struct urb *urb)
 813 {
 814         struct sk_buff *skb = (struct sk_buff *)urb->context;
 815         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 816         struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 817         struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 818         int err;
 819
 820         if (unlikely(IS_USB_STOP(rtlusb)))
 821                 return;
 822         err = _usb_tx_post(hw, urb, skb);
 823         if (err) {
 824                 /* Ignore error and keep issuiing other urbs */
 825                 return;
 826         }
 827 }
 828
 829 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 830                                 struct sk_buff *skb, u32 ep_num)
 831 {
 832         struct rtl_priv *rtlpriv = rtl_priv(hw);
 833         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 834         struct urb *_urb;
 835
 836         WARN_ON(NULL == skb);
 837         _urb = usb_alloc_urb(0, GFP_ATOMIC);
 838         if (!_urb) {
 839                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 840                          "Can't allocate URB for bulk out!\n");
 841                 kfree_skb(skb);
 842                 return NULL;
 843         }
 844         _rtl_install_trx_info(rtlusb, skb, ep_num);
 845         usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 846                           ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 847         _urb->transfer_flags |= URB_ZERO_PACKET;
 848         return _urb;
 849 }
 850
 851 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 852                        enum rtl_txq qnum)
 853 {
 854         struct rtl_priv *rtlpriv = rtl_priv(hw);
 855         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 856         u32 ep_num;
 857         struct urb *_urb = NULL;
 858         struct sk_buff *_skb = NULL;
 859
 860         WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 861         if (unlikely(IS_USB_STOP(rtlusb))) {
 862                 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 863                          "USB device is stopping...\n");
 864                 kfree_skb(skb);
 865                 return;
 866         }
 867         ep_num = rtlusb->ep_map.ep_mapping[qnum];
 868         _skb = skb;
 869         _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 870         if (unlikely(!_urb)) {
 871                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 872                          "Can't allocate urb. Drop skb!\n");
 873                 return;
 874         }
 875         _rtl_submit_tx_urb(hw, _urb);
 876 }
 877
 878 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 879                                    struct ieee80211_sta *sta,
 880                                    struct sk_buff *skb,
 881                                    u16 hw_queue)
 882 {
 883         struct rtl_priv *rtlpriv = rtl_priv(hw);
 884         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 885         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 886         struct rtl_tx_desc *pdesc = NULL;
 887         struct rtl_tcb_desc tcb_desc;
 888         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 889         __le16 fc = hdr->frame_control;
 890         u8 *pda_addr = hdr->addr1;
 891         /* ssn */
 892         u8 *qc = NULL;
 893         u8 tid = 0;
 894         u16 seq_number = 0;
 895
 896         memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 897         if (ieee80211_is_auth(fc)) {
 898                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 899                 rtl_ips_nic_on(hw);
 900         }
 901
 902         if (rtlpriv->psc.sw_ps_enabled) {
 903                 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 904                     !ieee80211_has_pm(fc))
 905                         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 906         }
 907
 908         rtl_action_proc(hw, skb, true);
 909         if (is_multicast_ether_addr(pda_addr))
 910                 rtlpriv->stats.txbytesmulticast += skb->len;
 911         else if (is_broadcast_ether_addr(pda_addr))
 912                 rtlpriv->stats.txbytesbroadcast += skb->len;
 913         else
 914                 rtlpriv->stats.txbytesunicast += skb->len;
 915         if (ieee80211_is_data_qos(fc)) {
 916                 qc = ieee80211_get_qos_ctl(hdr);
 917                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 918                 seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 919                              IEEE80211_SCTL_SEQ) >> 4;
 920                 seq_number += 1;
 921                 seq_number <<= 4;
 922         }
 923         rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
 924                                         hw_queue, &tcb_desc);
 925         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 926                 if (qc)
 927                         mac->tids[tid].seq_number = seq_number;
 928         }
 929         if (ieee80211_is_data(fc))
 930                 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
 931 }
 932
 933 static int rtl_usb_tx(struct ieee80211_hw *hw,
 934                       struct ieee80211_sta *sta,
 935                       struct sk_buff *skb,
 936                       struct rtl_tcb_desc *dummy)
 937 {
 938         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 939         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 940         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 941         __le16 fc = hdr->frame_control;
 942         u16 hw_queue;
 943
 944         if (unlikely(is_hal_stop(rtlhal)))
 945                 goto err_free;
 946         hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
 947         _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
 948         _rtl_usb_transmit(hw, skb, hw_queue);
 949         return NETDEV_TX_OK;
 950
 951 err_free:
 952         dev_kfree_skb_any(skb);
 953         return NETDEV_TX_OK;
 954 }
 955
 956 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
 957                                         struct ieee80211_sta *sta,
 958                                         struct sk_buff *skb)
 959 {
 960         return false;
 961 }
 962
 963 static struct rtl_intf_ops rtl_usb_ops = {
 964         .adapter_start = rtl_usb_start,
 965         .adapter_stop = rtl_usb_stop,
 966         .adapter_tx = rtl_usb_tx,
 967         .waitq_insert = rtl_usb_tx_chk_waitq_insert,
 968 };
 969
 970 int rtl_usb_probe(struct usb_interface *intf,
 971                   const struct usb_device_id *id,
 972                   struct rtl_hal_cfg *rtl_hal_cfg)
 973 {
 974         int err;
 975         struct ieee80211_hw *hw = NULL;
 976         struct rtl_priv *rtlpriv = NULL;
 977         struct usb_device       *udev;
 978         struct rtl_usb_priv *usb_priv;
 979
 980         hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
 981                                 sizeof(struct rtl_usb_priv), &rtl_ops);
 982         if (!hw) {
 983                 RT_ASSERT(false, "ieee80211 alloc failed\n");
 984                 return -ENOMEM;
 985         }
 986         rtlpriv = hw->priv;
 987         rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
 988                                     GFP_KERNEL);
 989         if (!rtlpriv->usb_data)
 990                 return -ENOMEM;
 991
 992         /* this spin lock must be initialized early */
 993         spin_lock_init(&rtlpriv->locks.usb_lock);
 994
 995         rtlpriv->usb_data_index = 0;
 996         init_completion(&rtlpriv->firmware_loading_complete);
 997         SET_IEEE80211_DEV(hw, &intf->dev);
 998         udev = interface_to_usbdev(intf);
 999         usb_get_dev(udev);
1000         usb_priv = rtl_usbpriv(hw);
1001         memset(usb_priv, 0, sizeof(*usb_priv));
1002         usb_priv->dev.intf = intf;
1003         usb_priv->dev.udev = udev;
1004         usb_set_intfdata(intf, hw);
1005         /* init cfg & intf_ops */
1006         rtlpriv->rtlhal.interface = INTF_USB;
1007         rtlpriv->cfg = rtl_hal_cfg;
1008         rtlpriv->intf_ops = &rtl_usb_ops;
1009         rtl_dbgp_flag_init(hw);
1010         /* Init IO handler */
1011         _rtl_usb_io_handler_init(&udev->dev, hw);
1012         rtlpriv->cfg->ops->read_chip_version(hw);
1013         /*like read eeprom and so on */
1014         rtlpriv->cfg->ops->read_eeprom_info(hw);
1015         err = _rtl_usb_init(hw);
1016         if (err)
1017                 goto error_out;
1018         rtl_usb_init_sw(hw);
1019         /* Init mac80211 sw */
1020         err = rtl_init_core(hw);
1021         if (err) {
1022                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1023                          "Can't allocate sw for mac80211\n");
1024                 goto error_out;
1025         }
1026         if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1027                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1028                 goto error_out;
1029         }
1030         rtlpriv->cfg->ops->init_sw_leds(hw);
1031
1032         return 0;
1033 error_out:
1034         rtl_deinit_core(hw);
1035         _rtl_usb_io_handler_release(hw);
1036         usb_put_dev(udev);
1037         complete(&rtlpriv->firmware_loading_complete);
1038         return -ENODEV;
1039 }
1040 EXPORT_SYMBOL(rtl_usb_probe);
1041
1042 void rtl_usb_disconnect(struct usb_interface *intf)
1043 {
1044         struct ieee80211_hw *hw = usb_get_intfdata(intf);
1045         struct rtl_priv *rtlpriv = rtl_priv(hw);
1046         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1047         struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1048
1049         if (unlikely(!rtlpriv))
1050                 return;
1051
1052         /* just in case driver is removed before firmware callback */
1053         wait_for_completion(&rtlpriv->firmware_loading_complete);
1054         /*ieee80211_unregister_hw will call ops_stop */
1055         if (rtlmac->mac80211_registered == 1) {
1056                 ieee80211_unregister_hw(hw);
1057                 rtlmac->mac80211_registered = 0;
1058         } else {
1059                 rtl_deinit_deferred_work(hw);
1060                 rtlpriv->intf_ops->adapter_stop(hw);
1061         }
1062         /*deinit rfkill */
1063         /* rtl_deinit_rfkill(hw); */
1064         rtl_usb_deinit(hw);
1065         rtl_deinit_core(hw);
1066         kfree(rtlpriv->usb_data);
1067         rtlpriv->cfg->ops->deinit_sw_leds(hw);
1068         rtlpriv->cfg->ops->deinit_sw_vars(hw);
1069         _rtl_usb_io_handler_release(hw);
1070         usb_put_dev(rtlusb->udev);
1071         usb_set_intfdata(intf, NULL);
1072         ieee80211_free_hw(hw);
1073 }
1074 EXPORT_SYMBOL(rtl_usb_disconnect);
1075
1076 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1077 {
1078         return 0;
1079 }
1080 EXPORT_SYMBOL(rtl_usb_suspend);
1081
1082 int rtl_usb_resume(struct usb_interface *pusb_intf)
1083 {
1084         return 0;
1085 }
1086 EXPORT_SYMBOL(rtl_usb_resume);