drivers/net/wireless/mwifiex/usb.c

   1 /*
   2  * Marvell Wireless LAN device driver: USB specific handling
   3  *
   4  * Copyright (C) 2012-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "main.h"
  21 #include "usb.h"
  22
  23 #define USB_VERSION     "1.0"
  24
  25 static u8 user_rmmod;
  26 static struct mwifiex_if_ops usb_ops;
  27 static struct semaphore add_remove_card_sem;
  28
  29 static struct usb_device_id mwifiex_usb_table[] = {
  30         /* 8766 */
  31         {USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
  32         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
  33                                        USB_CLASS_VENDOR_SPEC,
  34                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  35         /* 8797 */
  36         {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
  37         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
  38                                        USB_CLASS_VENDOR_SPEC,
  39                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  40         /* 8801 */
  41         {USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
  42         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
  43                                        USB_CLASS_VENDOR_SPEC,
  44                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  45         /* 8997 */
  46         {USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
  47         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
  48                                        USB_CLASS_VENDOR_SPEC,
  49                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  50         { }     /* Terminating entry */
  51 };
  52
  53 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
  54
  55 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
  56
  57 /* This function handles received packet. Necessary action is taken based on
  58  * cmd/event/data.
  59  */
  60 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
  61                             struct sk_buff *skb, u8 ep)
  62 {
  63         u32 recv_type;
  64         __le32 tmp;
  65         int ret;
  66
  67         if (adapter->hs_activated)
  68                 mwifiex_process_hs_config(adapter);
  69
  70         if (skb->len < INTF_HEADER_LEN) {
  71                 mwifiex_dbg(adapter, ERROR,
  72                             "%s: invalid skb->len\n", __func__);
  73                 return -1;
  74         }
  75
  76         switch (ep) {
  77         case MWIFIEX_USB_EP_CMD_EVENT:
  78                 mwifiex_dbg(adapter, EVENT,
  79                             "%s: EP_CMD_EVENT\n", __func__);
  80                 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
  81                 recv_type = le32_to_cpu(tmp);
  82                 skb_pull(skb, INTF_HEADER_LEN);
  83
  84                 switch (recv_type) {
  85                 case MWIFIEX_USB_TYPE_CMD:
  86                         if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
  87                                 mwifiex_dbg(adapter, ERROR,
  88                                             "CMD: skb->len too large\n");
  89                                 ret = -1;
  90                                 goto exit_restore_skb;
  91                         } else if (!adapter->curr_cmd) {
  92                                 mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
  93                                 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
  94                                         mwifiex_process_sleep_confirm_resp(
  95                                                         adapter, skb->data,
  96                                                         skb->len);
  97                                         ret = 0;
  98                                         goto exit_restore_skb;
  99                                 }
 100                                 ret = -1;
 101                                 goto exit_restore_skb;
 102                         }
 103
 104                         adapter->curr_cmd->resp_skb = skb;
 105                         adapter->cmd_resp_received = true;
 106                         break;
 107                 case MWIFIEX_USB_TYPE_EVENT:
 108                         if (skb->len < sizeof(u32)) {
 109                                 mwifiex_dbg(adapter, ERROR,
 110                                             "EVENT: skb->len too small\n");
 111                                 ret = -1;
 112                                 goto exit_restore_skb;
 113                         }
 114                         skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
 115                         adapter->event_cause = le32_to_cpu(tmp);
 116                         mwifiex_dbg(adapter, EVENT,
 117                                     "event_cause %#x\n", adapter->event_cause);
 118
 119                         if (skb->len > MAX_EVENT_SIZE) {
 120                                 mwifiex_dbg(adapter, ERROR,
 121                                             "EVENT: event body too large\n");
 122                                 ret = -1;
 123                                 goto exit_restore_skb;
 124                         }
 125
 126                         memcpy(adapter->event_body, skb->data +
 127                                MWIFIEX_EVENT_HEADER_LEN, skb->len);
 128
 129                         adapter->event_received = true;
 130                         adapter->event_skb = skb;
 131                         break;
 132                 default:
 133                         mwifiex_dbg(adapter, ERROR,
 134                                     "unknown recv_type %#x\n", recv_type);
 135                         return -1;
 136                 }
 137                 break;
 138         case MWIFIEX_USB_EP_DATA:
 139                 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
 140                 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
 141                         mwifiex_dbg(adapter, ERROR,
 142                                     "DATA: skb->len too large\n");
 143                         return -1;
 144                 }
 145
 146                 skb_queue_tail(&adapter->rx_data_q, skb);
 147                 adapter->data_received = true;
 148                 atomic_inc(&adapter->rx_pending);
 149                 break;
 150         default:
 151                 mwifiex_dbg(adapter, ERROR,
 152                             "%s: unknown endport %#x\n", __func__, ep);
 153                 return -1;
 154         }
 155
 156         return -EINPROGRESS;
 157
 158 exit_restore_skb:
 159         /* The buffer will be reused for further cmds/events */
 160         skb_push(skb, INTF_HEADER_LEN);
 161
 162         return ret;
 163 }
 164
 165 static void mwifiex_usb_rx_complete(struct urb *urb)
 166 {
 167         struct urb_context *context = (struct urb_context *)urb->context;
 168         struct mwifiex_adapter *adapter = context->adapter;
 169         struct sk_buff *skb = context->skb;
 170         struct usb_card_rec *card;
 171         int recv_length = urb->actual_length;
 172         int size, status;
 173
 174         if (!adapter || !adapter->card) {
 175                 pr_err("mwifiex adapter or card structure is not valid\n");
 176                 return;
 177         }
 178
 179         card = (struct usb_card_rec *)adapter->card;
 180         if (card->rx_cmd_ep == context->ep)
 181                 atomic_dec(&card->rx_cmd_urb_pending);
 182         else
 183                 atomic_dec(&card->rx_data_urb_pending);
 184
 185         if (recv_length) {
 186                 if (urb->status || (adapter->surprise_removed)) {
 187                         mwifiex_dbg(adapter, ERROR,
 188                                     "URB status is failed: %d\n", urb->status);
 189                         /* Do not free skb in case of command ep */
 190                         if (card->rx_cmd_ep != context->ep)
 191                                 dev_kfree_skb_any(skb);
 192                         goto setup_for_next;
 193                 }
 194                 if (skb->len > recv_length)
 195                         skb_trim(skb, recv_length);
 196                 else
 197                         skb_put(skb, recv_length - skb->len);
 198
 199                 status = mwifiex_usb_recv(adapter, skb, context->ep);
 200
 201                 mwifiex_dbg(adapter, INFO,
 202                             "info: recv_length=%d, status=%d\n",
 203                             recv_length, status);
 204                 if (status == -EINPROGRESS) {
 205                         mwifiex_queue_main_work(adapter);
 206
 207                         /* urb for data_ep is re-submitted now;
 208                          * urb for cmd_ep will be re-submitted in callback
 209                          * mwifiex_usb_recv_complete
 210                          */
 211                         if (card->rx_cmd_ep == context->ep)
 212                                 return;
 213                 } else {
 214                         if (status == -1)
 215                                 mwifiex_dbg(adapter, ERROR,
 216                                             "received data processing failed!\n");
 217
 218                         /* Do not free skb in case of command ep */
 219                         if (card->rx_cmd_ep != context->ep)
 220                                 dev_kfree_skb_any(skb);
 221                 }
 222         } else if (urb->status) {
 223                 if (!adapter->is_suspended) {
 224                         mwifiex_dbg(adapter, FATAL,
 225                                     "Card is removed: %d\n", urb->status);
 226                         adapter->surprise_removed = true;
 227                 }
 228                 dev_kfree_skb_any(skb);
 229                 return;
 230         } else {
 231                 /* Do not free skb in case of command ep */
 232                 if (card->rx_cmd_ep != context->ep)
 233                         dev_kfree_skb_any(skb);
 234
 235                 /* fall through setup_for_next */
 236         }
 237
 238 setup_for_next:
 239         if (card->rx_cmd_ep == context->ep)
 240                 size = MWIFIEX_RX_CMD_BUF_SIZE;
 241         else
 242                 size = MWIFIEX_RX_DATA_BUF_SIZE;
 243
 244         if (card->rx_cmd_ep == context->ep) {
 245                 mwifiex_usb_submit_rx_urb(context, size);
 246         } else {
 247                 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING){
 248                         mwifiex_usb_submit_rx_urb(context, size);
 249                 }else{
 250                         context->skb = NULL;
 251                 }
 252         }
 253
 254         return;
 255 }
 256
 257 static void mwifiex_usb_tx_complete(struct urb *urb)
 258 {
 259         struct urb_context *context = (struct urb_context *)(urb->context);
 260         struct mwifiex_adapter *adapter = context->adapter;
 261         struct usb_card_rec *card = adapter->card;
 262         struct usb_tx_data_port *port;
 263         int i;
 264
 265         mwifiex_dbg(adapter, INFO,
 266                     "%s: status: %d\n", __func__, urb->status);
 267
 268         if (context->ep == card->tx_cmd_ep) {
 269                 mwifiex_dbg(adapter, CMD,
 270                             "%s: CMD\n", __func__);
 271                 atomic_dec(&card->tx_cmd_urb_pending);
 272                 adapter->cmd_sent = false;
 273         } else {
 274                 mwifiex_dbg(adapter, DATA,
 275                             "%s: DATA\n", __func__);
 276                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 277                         port = &card->port[i];
 278                         if (context->ep == port->tx_data_ep) {
 279                                 atomic_dec(&port->tx_data_urb_pending);
 280                                 port->block_status = false;
 281                                 break;
 282                         }
 283                 }
 284                 adapter->data_sent = false;
 285                 mwifiex_write_data_complete(adapter, context->skb, 0,
 286                                             urb->status ? -1 : 0);
 287         }
 288
 289         if (card->mc_resync_flag)
 290                 mwifiex_multi_chan_resync(adapter);
 291
 292         mwifiex_queue_main_work(adapter);
 293
 294         return;
 295 }
 296
 297 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
 298 {
 299         struct mwifiex_adapter *adapter = ctx->adapter;
 300         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 301
 302         if (card->rx_cmd_ep != ctx->ep) {
 303                 ctx->skb = dev_alloc_skb(size);
 304                 if (!ctx->skb) {
 305                         mwifiex_dbg(adapter, ERROR,
 306                                     "%s: dev_alloc_skb failed\n", __func__);
 307                         return -ENOMEM;
 308                 }
 309         }
 310
 311         usb_fill_bulk_urb(ctx->urb, card->udev,
 312                           usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
 313                           size, mwifiex_usb_rx_complete, (void *)ctx);
 314
 315         if (card->rx_cmd_ep == ctx->ep)
 316                 atomic_inc(&card->rx_cmd_urb_pending);
 317         else
 318                 atomic_inc(&card->rx_data_urb_pending);
 319
 320         if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
 321                 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
 322                 dev_kfree_skb_any(ctx->skb);
 323                 ctx->skb = NULL;
 324
 325                 if (card->rx_cmd_ep == ctx->ep)
 326                         atomic_dec(&card->rx_cmd_urb_pending);
 327                 else
 328                         atomic_dec(&card->rx_data_urb_pending);
 329
 330                 return -1;
 331         }
 332
 333         return 0;
 334 }
 335
 336 static void mwifiex_usb_free(struct usb_card_rec *card)
 337 {
 338         struct usb_tx_data_port *port;
 339         int i, j;
 340
 341         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 342                 usb_kill_urb(card->rx_cmd.urb);
 343
 344         usb_free_urb(card->rx_cmd.urb);
 345         card->rx_cmd.urb = NULL;
 346
 347         if (atomic_read(&card->rx_data_urb_pending))
 348                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 349                         if (card->rx_data_list[i].urb)
 350                                 usb_kill_urb(card->rx_data_list[i].urb);
 351
 352         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 353                 usb_free_urb(card->rx_data_list[i].urb);
 354                 card->rx_data_list[i].urb = NULL;
 355         }
 356
 357         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 358                 port = &card->port[i];
 359                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 360                         usb_free_urb(port->tx_data_list[j].urb);
 361                         port->tx_data_list[j].urb = NULL;
 362                 }
 363         }
 364
 365         usb_free_urb(card->tx_cmd.urb);
 366         card->tx_cmd.urb = NULL;
 367
 368         return;
 369 }
 370
 371 /* This function probes an mwifiex device and registers it. It allocates
 372  * the card structure, initiates the device registration and initialization
 373  * procedure by adding a logical interface.
 374  */
 375 static int mwifiex_usb_probe(struct usb_interface *intf,
 376                              const struct usb_device_id *id)
 377 {
 378         struct usb_device *udev = interface_to_usbdev(intf);
 379         struct usb_host_interface *iface_desc = intf->cur_altsetting;
 380         struct usb_endpoint_descriptor *epd;
 381         int ret, i;
 382         struct usb_card_rec *card;
 383         u16 id_vendor, id_product, bcd_device, bcd_usb;
 384
 385         card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 386         if (!card)
 387                 return -ENOMEM;
 388
 389         id_vendor = le16_to_cpu(udev->descriptor.idVendor);
 390         id_product = le16_to_cpu(udev->descriptor.idProduct);
 391         bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
 392         bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
 393         pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
 394                  id_vendor, id_product, bcd_device);
 395
 396         /* PID_1 is used for firmware downloading only */
 397         switch (id_product) {
 398         case USB8766_PID_1:
 399         case USB8797_PID_1:
 400         case USB8801_PID_1:
 401         case USB8997_PID_1:
 402                 card->usb_boot_state = USB8XXX_FW_DNLD;
 403                 break;
 404         case USB8766_PID_2:
 405         case USB8797_PID_2:
 406         case USB8801_PID_2:
 407         case USB8997_PID_2:
 408                 card->usb_boot_state = USB8XXX_FW_READY;
 409                 break;
 410         default:
 411                 pr_warn("unknown id_product %#x\n", id_product);
 412                 card->usb_boot_state = USB8XXX_FW_DNLD;
 413                 break;
 414         }
 415
 416         card->udev = udev;
 417         card->intf = intf;
 418
 419         pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
 420                  udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
 421                  udev->descriptor.bDeviceSubClass,
 422                  udev->descriptor.bDeviceProtocol);
 423
 424         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 425                 epd = &iface_desc->endpoint[i].desc;
 426                 if (usb_endpoint_dir_in(epd) &&
 427                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 428                     usb_endpoint_xfer_bulk(epd)) {
 429                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 430                                  le16_to_cpu(epd->wMaxPacketSize),
 431                                  epd->bEndpointAddress);
 432                         card->rx_cmd_ep = usb_endpoint_num(epd);
 433                         atomic_set(&card->rx_cmd_urb_pending, 0);
 434                 }
 435                 if (usb_endpoint_dir_in(epd) &&
 436                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 437                     usb_endpoint_xfer_bulk(epd)) {
 438                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 439                                  le16_to_cpu(epd->wMaxPacketSize),
 440                                  epd->bEndpointAddress);
 441                         card->rx_data_ep = usb_endpoint_num(epd);
 442                         atomic_set(&card->rx_data_urb_pending, 0);
 443                 }
 444                 if (usb_endpoint_dir_out(epd) &&
 445                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 446                     usb_endpoint_xfer_bulk(epd)) {
 447                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 448                                  le16_to_cpu(epd->wMaxPacketSize),
 449                                  epd->bEndpointAddress);
 450                         card->port[0].tx_data_ep = usb_endpoint_num(epd);
 451                         atomic_set(&card->port[0].tx_data_urb_pending, 0);
 452                 }
 453                 if (usb_endpoint_dir_out(epd) &&
 454                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
 455                     usb_endpoint_xfer_bulk(epd)) {
 456                         pr_debug("info: bulk OUT chan2:\t"
 457                                  "max pkt size: %d, addr: %d\n",
 458                                  le16_to_cpu(epd->wMaxPacketSize),
 459                                  epd->bEndpointAddress);
 460                         card->port[1].tx_data_ep = usb_endpoint_num(epd);
 461                         atomic_set(&card->port[1].tx_data_urb_pending, 0);
 462                 }
 463                 if (usb_endpoint_dir_out(epd) &&
 464                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 465                     usb_endpoint_xfer_bulk(epd)) {
 466                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 467                                  le16_to_cpu(epd->wMaxPacketSize),
 468                                  epd->bEndpointAddress);
 469                         card->tx_cmd_ep = usb_endpoint_num(epd);
 470                         atomic_set(&card->tx_cmd_urb_pending, 0);
 471                         card->bulk_out_maxpktsize =
 472                                         le16_to_cpu(epd->wMaxPacketSize);
 473                 }
 474         }
 475
 476         usb_set_intfdata(intf, card);
 477
 478         ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
 479                                MWIFIEX_USB);
 480         if (ret) {
 481                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
 482                 usb_reset_device(udev);
 483                 kfree(card);
 484                 return ret;
 485         }
 486
 487         usb_get_dev(udev);
 488
 489         return 0;
 490 }
 491
 492 /* Kernel needs to suspend all functions separately. Therefore all
 493  * registered functions must have drivers with suspend and resume
 494  * methods. Failing that the kernel simply removes the whole card.
 495  *
 496  * If already not suspended, this function allocates and sends a
 497  * 'host sleep activate' request to the firmware and turns off the traffic.
 498  */
 499 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
 500 {
 501         struct usb_card_rec *card = usb_get_intfdata(intf);
 502         struct mwifiex_adapter *adapter;
 503         struct usb_tx_data_port *port;
 504         int i, j;
 505
 506         if (!card || !card->adapter) {
 507                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 508                 return 0;
 509         }
 510         adapter = card->adapter;
 511
 512         if (unlikely(adapter->is_suspended))
 513                 mwifiex_dbg(adapter, WARN,
 514                             "Device already suspended\n");
 515
 516         mwifiex_enable_hs(adapter);
 517
 518         /* 'is_suspended' flag indicates device is suspended.
 519          * It must be set here before the usb_kill_urb() calls. Reason
 520          * is in the complete handlers, urb->status(= -ENOENT) and
 521          * this flag is used in combination to distinguish between a
 522          * 'suspended' state and a 'disconnect' one.
 523          */
 524         adapter->is_suspended = true;
 525         adapter->hs_enabling = false;
 526
 527         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 528                 usb_kill_urb(card->rx_cmd.urb);
 529
 530         if (atomic_read(&card->rx_data_urb_pending))
 531                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 532                         if (card->rx_data_list[i].urb)
 533                                 usb_kill_urb(card->rx_data_list[i].urb);
 534
 535         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 536                 port = &card->port[i];
 537                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 538                         if (port->tx_data_list[j].urb)
 539                                 usb_kill_urb(port->tx_data_list[j].urb);
 540                 }
 541         }
 542
 543         if (card->tx_cmd.urb)
 544                 usb_kill_urb(card->tx_cmd.urb);
 545
 546         return 0;
 547 }
 548
 549 /* Kernel needs to suspend all functions separately. Therefore all
 550  * registered functions must have drivers with suspend and resume
 551  * methods. Failing that the kernel simply removes the whole card.
 552  *
 553  * If already not resumed, this function turns on the traffic and
 554  * sends a 'host sleep cancel' request to the firmware.
 555  */
 556 static int mwifiex_usb_resume(struct usb_interface *intf)
 557 {
 558         struct usb_card_rec *card = usb_get_intfdata(intf);
 559         struct mwifiex_adapter *adapter;
 560         int i;
 561
 562         if (!card || !card->adapter) {
 563                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 564                 return 0;
 565         }
 566         adapter = card->adapter;
 567
 568         if (unlikely(!adapter->is_suspended)) {
 569                 mwifiex_dbg(adapter, WARN,
 570                             "Device already resumed\n");
 571                 return 0;
 572         }
 573
 574         /* Indicate device resumed. The netdev queue will be resumed only
 575          * after the urbs have been re-submitted
 576          */
 577         adapter->is_suspended = false;
 578
 579         if (!atomic_read(&card->rx_data_urb_pending))
 580                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 581                         mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 582                                                   MWIFIEX_RX_DATA_BUF_SIZE);
 583
 584         if (!atomic_read(&card->rx_cmd_urb_pending)) {
 585                 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 586                 if (card->rx_cmd.skb)
 587                         mwifiex_usb_submit_rx_urb(&card->rx_cmd,
 588                                                   MWIFIEX_RX_CMD_BUF_SIZE);
 589         }
 590
 591         /* Disable Host Sleep */
 592         if (adapter->hs_activated)
 593                 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
 594                                                    MWIFIEX_BSS_ROLE_ANY),
 595                                   MWIFIEX_ASYNC_CMD);
 596
 597         return 0;
 598 }
 599
 600 static void mwifiex_usb_disconnect(struct usb_interface *intf)
 601 {
 602         struct usb_card_rec *card = usb_get_intfdata(intf);
 603         struct mwifiex_adapter *adapter;
 604
 605         if (!card || !card->adapter) {
 606                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 607                 return;
 608         }
 609
 610         adapter = card->adapter;
 611         if (!adapter->priv_num)
 612                 return;
 613
 614         if (user_rmmod) {
 615 #ifdef CONFIG_PM
 616                 if (adapter->is_suspended)
 617                         mwifiex_usb_resume(intf);
 618 #endif
 619
 620                 mwifiex_deauthenticate_all(adapter);
 621
 622                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
 623                                                           MWIFIEX_BSS_ROLE_ANY),
 624                                          MWIFIEX_FUNC_SHUTDOWN);
 625         }
 626
 627         if (adapter->workqueue)
 628                 flush_workqueue(adapter->workqueue);
 629
 630         mwifiex_usb_free(card);
 631
 632         mwifiex_dbg(adapter, FATAL,
 633                     "%s: removing card\n", __func__);
 634         mwifiex_remove_card(adapter, &add_remove_card_sem);
 635
 636         usb_set_intfdata(intf, NULL);
 637         usb_put_dev(interface_to_usbdev(intf));
 638         kfree(card);
 639
 640         return;
 641 }
 642
 643 static struct usb_driver mwifiex_usb_driver = {
 644         .name = "mwifiex_usb",
 645         .probe = mwifiex_usb_probe,
 646         .disconnect = mwifiex_usb_disconnect,
 647         .id_table = mwifiex_usb_table,
 648         .suspend = mwifiex_usb_suspend,
 649         .resume = mwifiex_usb_resume,
 650         .soft_unbind = 1,
 651 };
 652
 653 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
 654 {
 655         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 656         struct usb_tx_data_port *port;
 657         int i, j;
 658
 659         card->tx_cmd.adapter = adapter;
 660         card->tx_cmd.ep = card->tx_cmd_ep;
 661
 662         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 663         if (!card->tx_cmd.urb) {
 664                 mwifiex_dbg(adapter, ERROR,
 665                             "tx_cmd.urb allocation failed\n");
 666                 return -ENOMEM;
 667         }
 668
 669         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 670                 port = &card->port[i];
 671                 if (!port->tx_data_ep)
 672                         continue;
 673                 port->tx_data_ix = 0;
 674                 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
 675                         port->block_status = false;
 676                 else
 677                         port->block_status = true;
 678                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 679                         port->tx_data_list[j].adapter = adapter;
 680                         port->tx_data_list[j].ep = port->tx_data_ep;
 681                         port->tx_data_list[j].urb =
 682                                         usb_alloc_urb(0, GFP_KERNEL);
 683                         if (!port->tx_data_list[j].urb) {
 684                                 mwifiex_dbg(adapter, ERROR,
 685                                             "urb allocation failed\n");
 686                                 return -ENOMEM;
 687                         }
 688                 }
 689         }
 690
 691         return 0;
 692 }
 693
 694 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
 695 {
 696         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 697         int i;
 698
 699         card->rx_cmd.adapter = adapter;
 700         card->rx_cmd.ep = card->rx_cmd_ep;
 701
 702         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 703         if (!card->rx_cmd.urb) {
 704                 mwifiex_dbg(adapter, ERROR, "rx_cmd.urb allocation failed\n");
 705                 return -ENOMEM;
 706         }
 707
 708         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 709         if (!card->rx_cmd.skb)
 710                 return -ENOMEM;
 711
 712         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
 713                 return -1;
 714
 715         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 716                 card->rx_data_list[i].adapter = adapter;
 717                 card->rx_data_list[i].ep = card->rx_data_ep;
 718
 719                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
 720                 if (!card->rx_data_list[i].urb) {
 721                         mwifiex_dbg(adapter, ERROR,
 722                                     "rx_data_list[] urb allocation failed\n");
 723                         return -1;
 724                 }
 725                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 726                                               MWIFIEX_RX_DATA_BUF_SIZE))
 727                         return -1;
 728         }
 729
 730         return 0;
 731 }
 732
 733 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 734                                    u32 *len, u8 ep, u32 timeout)
 735 {
 736         struct usb_card_rec *card = adapter->card;
 737         int actual_length, ret;
 738
 739         if (!(*len % card->bulk_out_maxpktsize))
 740                 (*len)++;
 741
 742         /* Send the data block */
 743         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
 744                            *len, &actual_length, timeout);
 745         if (ret) {
 746                 mwifiex_dbg(adapter, ERROR,
 747                             "usb_bulk_msg for tx failed: %d\n", ret);
 748                 return ret;
 749         }
 750
 751         *len = actual_length;
 752
 753         return ret;
 754 }
 755
 756 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 757                                   u32 *len, u8 ep, u32 timeout)
 758 {
 759         struct usb_card_rec *card = adapter->card;
 760         int actual_length, ret;
 761
 762         /* Receive the data response */
 763         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
 764                            *len, &actual_length, timeout);
 765         if (ret) {
 766                 mwifiex_dbg(adapter, ERROR,
 767                             "usb_bulk_msg for rx failed: %d\n", ret);
 768                 return ret;
 769         }
 770
 771         *len = actual_length;
 772
 773         return ret;
 774 }
 775
 776 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
 777 {
 778         struct usb_card_rec *card = adapter->card;
 779         u8 active_port = MWIFIEX_USB_EP_DATA;
 780         struct mwifiex_private *priv = NULL;
 781         int i;
 782
 783         if (adapter->usb_mc_status) {
 784                 for (i = 0; i < adapter->priv_num; i++) {
 785                         priv = adapter->priv[i];
 786                         if (!priv)
 787                                 continue;
 788                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 789                              !priv->bss_started) ||
 790                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 791                              !priv->media_connected))
 792                                 priv->usb_port = MWIFIEX_USB_EP_DATA;
 793                 }
 794                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 795                         card->port[i].block_status = false;
 796         } else {
 797                 for (i = 0; i < adapter->priv_num; i++) {
 798                         priv = adapter->priv[i];
 799                         if (!priv)
 800                                 continue;
 801                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 802                              priv->bss_started) ||
 803                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 804                              priv->media_connected)) {
 805                                 active_port = priv->usb_port;
 806                                 break;
 807                         }
 808                 }
 809                 for (i = 0; i < adapter->priv_num; i++) {
 810                         priv = adapter->priv[i];
 811                         if (priv)
 812                                 priv->usb_port = active_port;
 813                 }
 814                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 815                         if (active_port == card->port[i].tx_data_ep)
 816                                 card->port[i].block_status = false;
 817                         else
 818                                 card->port[i].block_status = true;
 819                 }
 820         }
 821 }
 822
 823 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
 824 {
 825         struct usb_card_rec *card = priv->adapter->card;
 826         int idx;
 827
 828         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 829                 if (priv->usb_port == card->port[idx].tx_data_ep)
 830                         return !card->port[idx].block_status;
 831         }
 832
 833         return false;
 834 }
 835
 836 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
 837 {
 838         struct usb_card_rec *card = adapter->card;
 839         int i;
 840
 841         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 842                 if (!card->port[i].block_status)
 843                         return false;
 844
 845         return true;
 846 }
 847
 848 /* This function write a command/data packet to card. */
 849 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
 850                                     struct sk_buff *skb,
 851                                     struct mwifiex_tx_param *tx_param)
 852 {
 853         struct usb_card_rec *card = adapter->card;
 854         struct urb_context *context = NULL;
 855         struct usb_tx_data_port *port = NULL;
 856         u8 *data = (u8 *)skb->data;
 857         struct urb *tx_urb;
 858         int idx, ret;
 859
 860         if (adapter->is_suspended) {
 861                 mwifiex_dbg(adapter, ERROR,
 862                             "%s: not allowed while suspended\n", __func__);
 863                 return -1;
 864         }
 865
 866         if (adapter->surprise_removed) {
 867                 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
 868                 return -1;
 869         }
 870
 871         mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
 872
 873         if (ep == card->tx_cmd_ep) {
 874                 context = &card->tx_cmd;
 875         } else {
 876                 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 877                         if (ep == card->port[idx].tx_data_ep) {
 878                                 port = &card->port[idx];
 879                                 if (atomic_read(&port->tx_data_urb_pending)
 880                                     >= MWIFIEX_TX_DATA_URB) {
 881                                         port->block_status = true;
 882                                         ret = -EBUSY;
 883                                         goto done;
 884                                 }
 885                                 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
 886                                         port->tx_data_ix = 0;
 887                                 context =
 888                                         &port->tx_data_list[port->tx_data_ix++];
 889                                 break;
 890                         }
 891                 }
 892                 if (!port) {
 893                         mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
 894                         return -1;
 895                 }
 896         }
 897
 898         context->adapter = adapter;
 899         context->ep = ep;
 900         context->skb = skb;
 901         tx_urb = context->urb;
 902
 903         usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
 904                           data, skb->len, mwifiex_usb_tx_complete,
 905                           (void *)context);
 906
 907         tx_urb->transfer_flags |= URB_ZERO_PACKET;
 908
 909         if (ep == card->tx_cmd_ep)
 910                 atomic_inc(&card->tx_cmd_urb_pending);
 911         else
 912                 atomic_inc(&port->tx_data_urb_pending);
 913
 914         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
 915                 mwifiex_dbg(adapter, ERROR,
 916                             "%s: usb_submit_urb failed\n", __func__);
 917                 if (ep == card->tx_cmd_ep) {
 918                         atomic_dec(&card->tx_cmd_urb_pending);
 919                 } else {
 920                         atomic_dec(&port->tx_data_urb_pending);
 921                         port->block_status = false;
 922                         if (port->tx_data_ix)
 923                                 port->tx_data_ix--;
 924                         else
 925                                 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
 926                 }
 927
 928                 return -1;
 929         } else {
 930                 if (ep != card->tx_cmd_ep &&
 931                     atomic_read(&port->tx_data_urb_pending) ==
 932                                                         MWIFIEX_TX_DATA_URB) {
 933                         port->block_status = true;
 934                         ret = -ENOSR;
 935                         goto done;
 936                 }
 937         }
 938
 939         return -EINPROGRESS;
 940
 941 done:
 942         if (ep != card->tx_cmd_ep)
 943                 adapter->data_sent = mwifiex_usb_data_sent(adapter);
 944
 945         return ret;
 946 }
 947
 948 /* This function register usb device and initialize parameter. */
 949 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
 950 {
 951         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 952
 953         card->adapter = adapter;
 954         adapter->dev = &card->udev->dev;
 955
 956         switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
 957         case USB8997_PID_1:
 958         case USB8997_PID_2:
 959                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 960                 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
 961                 adapter->ext_scan = true;
 962                 break;
 963         case USB8766_PID_1:
 964         case USB8766_PID_2:
 965                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 966                 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
 967                 adapter->ext_scan = true;
 968                 break;
 969         case USB8801_PID_1:
 970         case USB8801_PID_2:
 971                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 972                 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
 973                 adapter->ext_scan = false;
 974                 break;
 975         case USB8797_PID_1:
 976         case USB8797_PID_2:
 977         default:
 978                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 979                 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
 980                 break;
 981         }
 982
 983         adapter->usb_mc_status = false;
 984         adapter->usb_mc_setup = false;
 985
 986         return 0;
 987 }
 988
 989 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
 990 {
 991         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 992
 993         card->adapter = NULL;
 994 }
 995
 996 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 997                                     struct mwifiex_fw_image *fw)
 998 {
 999         int ret = 0;
1000         u8 *firmware = fw->fw_buf, *recv_buff;
1001         u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
1002         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1003         struct fw_data *fwdata;
1004         struct fw_sync_header sync_fw;
1005         u8 check_winner = 1;
1006
1007         if (!firmware) {
1008                 mwifiex_dbg(adapter, ERROR,
1009                             "No firmware image found! Terminating download\n");
1010                 ret = -1;
1011                 goto fw_exit;
1012         }
1013
1014         /* Allocate memory for transmit */
1015         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1016         if (!fwdata) {
1017                 ret = -ENOMEM;
1018                 goto fw_exit;
1019         }
1020
1021         /* Allocate memory for receive */
1022         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1023         if (!recv_buff)
1024                 goto cleanup;
1025
1026         do {
1027                 /* Send pseudo data to check winner status first */
1028                 if (check_winner) {
1029                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1030                         dlen = 0;
1031                 } else {
1032                         /* copy the header of the fw_data to get the length */
1033                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
1034                                sizeof(struct fw_header));
1035
1036                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1037                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1038                         tlen += sizeof(struct fw_header);
1039
1040                         memcpy(fwdata->data, &firmware[tlen], dlen);
1041
1042                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
1043                         tlen += dlen;
1044                 }
1045
1046                 /* If the send/receive fails or CRC occurs then retry */
1047                 while (retries--) {
1048                         u8 *buf = (u8 *)fwdata;
1049                         u32 len = FW_DATA_XMIT_SIZE;
1050
1051                         /* send the firmware block */
1052                         ret = mwifiex_write_data_sync(adapter, buf, &len,
1053                                                 MWIFIEX_USB_EP_CMD_EVENT,
1054                                                 MWIFIEX_USB_TIMEOUT);
1055                         if (ret) {
1056                                 mwifiex_dbg(adapter, ERROR,
1057                                             "write_data_sync: failed: %d\n",
1058                                             ret);
1059                                 continue;
1060                         }
1061
1062                         buf = recv_buff;
1063                         len = FW_DNLD_RX_BUF_SIZE;
1064
1065                         /* Receive the firmware block response */
1066                         ret = mwifiex_read_data_sync(adapter, buf, &len,
1067                                                 MWIFIEX_USB_EP_CMD_EVENT,
1068                                                 MWIFIEX_USB_TIMEOUT);
1069                         if (ret) {
1070                                 mwifiex_dbg(adapter, ERROR,
1071                                             "read_data_sync: failed: %d\n",
1072                                             ret);
1073                                 continue;
1074                         }
1075
1076                         memcpy(&sync_fw, recv_buff,
1077                                sizeof(struct fw_sync_header));
1078
1079                         /* check 1st firmware block resp for highest bit set */
1080                         if (check_winner) {
1081                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1082                                         mwifiex_dbg(adapter, WARN,
1083                                                     "USB is not the winner %#x\n",
1084                                                     sync_fw.cmd);
1085
1086                                         /* returning success */
1087                                         ret = 0;
1088                                         goto cleanup;
1089                                 }
1090
1091                                 mwifiex_dbg(adapter, MSG,
1092                                             "start to download FW...\n");
1093
1094                                 check_winner = 0;
1095                                 break;
1096                         }
1097
1098                         /* check the firmware block response for CRC errors */
1099                         if (sync_fw.cmd) {
1100                                 mwifiex_dbg(adapter, ERROR,
1101                                             "FW received block with CRC %#x\n",
1102                                             sync_fw.cmd);
1103                                 ret = -1;
1104                                 continue;
1105                         }
1106
1107                         retries = USB8XXX_FW_MAX_RETRY;
1108                         break;
1109                 }
1110                 fw_seqnum++;
1111         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1112
1113 cleanup:
1114         mwifiex_dbg(adapter, MSG,
1115                     "info: FW download over, size %d bytes\n", tlen);
1116
1117         kfree(recv_buff);
1118         kfree(fwdata);
1119
1120         if (retries)
1121                 ret = 0;
1122 fw_exit:
1123         return ret;
1124 }
1125
1126 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1127                         struct mwifiex_fw_image *fw)
1128 {
1129         int ret;
1130         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1131
1132         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1133                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1134                 if (ret)
1135                         return -1;
1136
1137                 /* Boot state changes after successful firmware download */
1138                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1139                         return -1;
1140         }
1141
1142         ret = mwifiex_usb_rx_init(adapter);
1143         if (!ret)
1144                 ret = mwifiex_usb_tx_init(adapter);
1145
1146         return ret;
1147 }
1148
1149 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1150 {
1151         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1152
1153         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1154         if ((ep == card->rx_cmd_ep) &&
1155             (!atomic_read(&card->rx_cmd_urb_pending)))
1156                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1157                                           MWIFIEX_RX_CMD_BUF_SIZE);
1158
1159         return;
1160 }
1161
1162 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1163                                        struct sk_buff *skb)
1164 {
1165         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1166
1167         return 0;
1168 }
1169
1170 /* This function wakes up the card. */
1171 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1172 {
1173         /* Simulation of HS_AWAKE event */
1174         adapter->pm_wakeup_fw_try = false;
1175         del_timer(&adapter->wakeup_timer);
1176         adapter->pm_wakeup_card_req = false;
1177         adapter->ps_state = PS_STATE_AWAKE;
1178
1179         return 0;
1180 }
1181
1182 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1183 {
1184         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1185         int i;
1186         struct urb_context *ctx;
1187
1188         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1189                 if (card->rx_data_list[i].skb)
1190                         continue;
1191                 ctx = &card->rx_data_list[i];
1192                 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1193         }
1194 }
1195
1196 /* This function is called after the card has woken up. */
1197 static inline int
1198 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1199 {
1200         return 0;
1201 }
1202
1203 static struct mwifiex_if_ops usb_ops = {
1204         .register_dev =         mwifiex_register_dev,
1205         .unregister_dev =       mwifiex_unregister_dev,
1206         .wakeup =               mwifiex_pm_wakeup_card,
1207         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
1208
1209         /* USB specific */
1210         .dnld_fw =              mwifiex_usb_dnld_fw,
1211         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
1212         .event_complete =       mwifiex_usb_cmd_event_complete,
1213         .host_to_card =         mwifiex_usb_host_to_card,
1214         .submit_rem_rx_urbs =   mwifiex_usb_submit_rem_rx_urbs,
1215         .multi_port_resync =    mwifiex_usb_port_resync,
1216         .is_port_ready =        mwifiex_usb_is_port_ready,
1217 };
1218
1219 /* This function initializes the USB driver module.
1220  *
1221  * This initiates the semaphore and registers the device with
1222  * USB bus.
1223  */
1224 static int mwifiex_usb_init_module(void)
1225 {
1226         int ret;
1227
1228         pr_debug("Marvell USB8797 Driver\n");
1229
1230         sema_init(&add_remove_card_sem, 1);
1231
1232         ret = usb_register(&mwifiex_usb_driver);
1233         if (ret)
1234                 pr_err("Driver register failed!\n");
1235         else
1236                 pr_debug("info: Driver registered successfully!\n");
1237
1238         return ret;
1239 }
1240
1241 /* This function cleans up the USB driver.
1242  *
1243  * The following major steps are followed in .disconnect for cleanup:
1244  *      - Resume the device if its suspended
1245  *      - Disconnect the device if connected
1246  *      - Shutdown the firmware
1247  *      - Unregister the device from USB bus.
1248  */
1249 static void mwifiex_usb_cleanup_module(void)
1250 {
1251         if (!down_interruptible(&add_remove_card_sem))
1252                 up(&add_remove_card_sem);
1253
1254         /* set the flag as user is removing this module */
1255         user_rmmod = 1;
1256
1257         usb_deregister(&mwifiex_usb_driver);
1258 }
1259
1260 module_init(mwifiex_usb_init_module);
1261 module_exit(mwifiex_usb_cleanup_module);
1262
1263 MODULE_AUTHOR("Marvell International Ltd.");
1264 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1265 MODULE_VERSION(USB_VERSION);
1266 MODULE_LICENSE("GPL v2");
1267 /*(DEBLOBBED)*/