drivers/net/wireless/marvell/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
  28 static struct usb_device_id mwifiex_usb_table[] = {
  29         /* 8766 */
  30         {USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
  31         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
  32                                        USB_CLASS_VENDOR_SPEC,
  33                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  34         /* 8797 */
  35         {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
  36         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
  37                                        USB_CLASS_VENDOR_SPEC,
  38                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  39         /* 8801 */
  40         {USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
  41         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
  42                                        USB_CLASS_VENDOR_SPEC,
  43                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  44         /* 8997 */
  45         {USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
  46         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
  47                                        USB_CLASS_VENDOR_SPEC,
  48                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  49         { }     /* Terminating entry */
  50 };
  51
  52 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
  53
  54 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
  55
  56 /* This function handles received packet. Necessary action is taken based on
  57  * cmd/event/data.
  58  */
  59 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
  60                             struct sk_buff *skb, u8 ep)
  61 {
  62         u32 recv_type;
  63         __le32 tmp;
  64         int ret;
  65
  66         if (adapter->hs_activated)
  67                 mwifiex_process_hs_config(adapter);
  68
  69         if (skb->len < INTF_HEADER_LEN) {
  70                 mwifiex_dbg(adapter, ERROR,
  71                             "%s: invalid skb->len\n", __func__);
  72                 return -1;
  73         }
  74
  75         switch (ep) {
  76         case MWIFIEX_USB_EP_CMD_EVENT:
  77                 mwifiex_dbg(adapter, EVENT,
  78                             "%s: EP_CMD_EVENT\n", __func__);
  79                 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
  80                 recv_type = le32_to_cpu(tmp);
  81                 skb_pull(skb, INTF_HEADER_LEN);
  82
  83                 switch (recv_type) {
  84                 case MWIFIEX_USB_TYPE_CMD:
  85                         if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
  86                                 mwifiex_dbg(adapter, ERROR,
  87                                             "CMD: skb->len too large\n");
  88                                 ret = -1;
  89                                 goto exit_restore_skb;
  90                         } else if (!adapter->curr_cmd) {
  91                                 mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
  92                                 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
  93                                         mwifiex_process_sleep_confirm_resp(
  94                                                         adapter, skb->data,
  95                                                         skb->len);
  96                                         ret = 0;
  97                                         goto exit_restore_skb;
  98                                 }
  99                                 ret = -1;
 100                                 goto exit_restore_skb;
 101                         }
 102
 103                         adapter->curr_cmd->resp_skb = skb;
 104                         adapter->cmd_resp_received = true;
 105                         break;
 106                 case MWIFIEX_USB_TYPE_EVENT:
 107                         if (skb->len < sizeof(u32)) {
 108                                 mwifiex_dbg(adapter, ERROR,
 109                                             "EVENT: skb->len too small\n");
 110                                 ret = -1;
 111                                 goto exit_restore_skb;
 112                         }
 113                         skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
 114                         adapter->event_cause = le32_to_cpu(tmp);
 115                         mwifiex_dbg(adapter, EVENT,
 116                                     "event_cause %#x\n", adapter->event_cause);
 117
 118                         if (skb->len > MAX_EVENT_SIZE) {
 119                                 mwifiex_dbg(adapter, ERROR,
 120                                             "EVENT: event body too large\n");
 121                                 ret = -1;
 122                                 goto exit_restore_skb;
 123                         }
 124
 125                         memcpy(adapter->event_body, skb->data +
 126                                MWIFIEX_EVENT_HEADER_LEN, skb->len);
 127
 128                         adapter->event_received = true;
 129                         adapter->event_skb = skb;
 130                         break;
 131                 default:
 132                         mwifiex_dbg(adapter, ERROR,
 133                                     "unknown recv_type %#x\n", recv_type);
 134                         return -1;
 135                 }
 136                 break;
 137         case MWIFIEX_USB_EP_DATA:
 138                 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
 139                 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
 140                         mwifiex_dbg(adapter, ERROR,
 141                                     "DATA: skb->len too large\n");
 142                         return -1;
 143                 }
 144
 145                 skb_queue_tail(&adapter->rx_data_q, skb);
 146                 adapter->data_received = true;
 147                 atomic_inc(&adapter->rx_pending);
 148                 break;
 149         default:
 150                 mwifiex_dbg(adapter, ERROR,
 151                             "%s: unknown endport %#x\n", __func__, ep);
 152                 return -1;
 153         }
 154
 155         return -EINPROGRESS;
 156
 157 exit_restore_skb:
 158         /* The buffer will be reused for further cmds/events */
 159         skb_push(skb, INTF_HEADER_LEN);
 160
 161         return ret;
 162 }
 163
 164 static void mwifiex_usb_rx_complete(struct urb *urb)
 165 {
 166         struct urb_context *context = (struct urb_context *)urb->context;
 167         struct mwifiex_adapter *adapter = context->adapter;
 168         struct sk_buff *skb = context->skb;
 169         struct usb_card_rec *card;
 170         int recv_length = urb->actual_length;
 171         int size, status;
 172
 173         if (!adapter || !adapter->card) {
 174                 pr_err("mwifiex adapter or card structure is not valid\n");
 175                 return;
 176         }
 177
 178         card = (struct usb_card_rec *)adapter->card;
 179         if (card->rx_cmd_ep == context->ep)
 180                 atomic_dec(&card->rx_cmd_urb_pending);
 181         else
 182                 atomic_dec(&card->rx_data_urb_pending);
 183
 184         if (recv_length) {
 185                 if (urb->status || (adapter->surprise_removed)) {
 186                         mwifiex_dbg(adapter, ERROR,
 187                                     "URB status is failed: %d\n", urb->status);
 188                         /* Do not free skb in case of command ep */
 189                         if (card->rx_cmd_ep != context->ep)
 190                                 dev_kfree_skb_any(skb);
 191                         goto setup_for_next;
 192                 }
 193                 if (skb->len > recv_length)
 194                         skb_trim(skb, recv_length);
 195                 else
 196                         skb_put(skb, recv_length - skb->len);
 197
 198                 status = mwifiex_usb_recv(adapter, skb, context->ep);
 199
 200                 mwifiex_dbg(adapter, INFO,
 201                             "info: recv_length=%d, status=%d\n",
 202                             recv_length, status);
 203                 if (status == -EINPROGRESS) {
 204                         mwifiex_queue_main_work(adapter);
 205
 206                         /* urb for data_ep is re-submitted now;
 207                          * urb for cmd_ep will be re-submitted in callback
 208                          * mwifiex_usb_recv_complete
 209                          */
 210                         if (card->rx_cmd_ep == context->ep)
 211                                 return;
 212                 } else {
 213                         if (status == -1)
 214                                 mwifiex_dbg(adapter, ERROR,
 215                                             "received data processing failed!\n");
 216
 217                         /* Do not free skb in case of command ep */
 218                         if (card->rx_cmd_ep != context->ep)
 219                                 dev_kfree_skb_any(skb);
 220                 }
 221         } else if (urb->status) {
 222                 if (!adapter->is_suspended) {
 223                         mwifiex_dbg(adapter, FATAL,
 224                                     "Card is removed: %d\n", urb->status);
 225                         adapter->surprise_removed = true;
 226                 }
 227                 dev_kfree_skb_any(skb);
 228                 return;
 229         } else {
 230                 /* Do not free skb in case of command ep */
 231                 if (card->rx_cmd_ep != context->ep)
 232                         dev_kfree_skb_any(skb);
 233
 234                 /* fall through setup_for_next */
 235         }
 236
 237 setup_for_next:
 238         if (card->rx_cmd_ep == context->ep)
 239                 size = MWIFIEX_RX_CMD_BUF_SIZE;
 240         else
 241                 size = MWIFIEX_RX_DATA_BUF_SIZE;
 242
 243         if (card->rx_cmd_ep == context->ep) {
 244                 mwifiex_usb_submit_rx_urb(context, size);
 245         } else {
 246                 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING) {
 247                         mwifiex_usb_submit_rx_urb(context, size);
 248                 } else {
 249                         context->skb = NULL;
 250                 }
 251         }
 252
 253         return;
 254 }
 255
 256 static void mwifiex_usb_tx_complete(struct urb *urb)
 257 {
 258         struct urb_context *context = (struct urb_context *)(urb->context);
 259         struct mwifiex_adapter *adapter = context->adapter;
 260         struct usb_card_rec *card = adapter->card;
 261         struct usb_tx_data_port *port;
 262         int i;
 263
 264         mwifiex_dbg(adapter, INFO,
 265                     "%s: status: %d\n", __func__, urb->status);
 266
 267         if (context->ep == card->tx_cmd_ep) {
 268                 mwifiex_dbg(adapter, CMD,
 269                             "%s: CMD\n", __func__);
 270                 atomic_dec(&card->tx_cmd_urb_pending);
 271                 adapter->cmd_sent = false;
 272         } else {
 273                 mwifiex_dbg(adapter, DATA,
 274                             "%s: DATA\n", __func__);
 275                 mwifiex_write_data_complete(adapter, context->skb, 0,
 276                                             urb->status ? -1 : 0);
 277                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 278                         port = &card->port[i];
 279                         if (context->ep == port->tx_data_ep) {
 280                                 atomic_dec(&port->tx_data_urb_pending);
 281                                 port->block_status = false;
 282                                 break;
 283                         }
 284                 }
 285                 adapter->data_sent = false;
 286         }
 287
 288         if (card->mc_resync_flag)
 289                 mwifiex_multi_chan_resync(adapter);
 290
 291         mwifiex_queue_main_work(adapter);
 292
 293         return;
 294 }
 295
 296 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
 297 {
 298         struct mwifiex_adapter *adapter = ctx->adapter;
 299         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 300
 301         if (card->rx_cmd_ep != ctx->ep) {
 302                 ctx->skb = dev_alloc_skb(size);
 303                 if (!ctx->skb) {
 304                         mwifiex_dbg(adapter, ERROR,
 305                                     "%s: dev_alloc_skb failed\n", __func__);
 306                         return -ENOMEM;
 307                 }
 308         }
 309
 310         usb_fill_bulk_urb(ctx->urb, card->udev,
 311                           usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
 312                           size, mwifiex_usb_rx_complete, (void *)ctx);
 313
 314         if (card->rx_cmd_ep == ctx->ep)
 315                 atomic_inc(&card->rx_cmd_urb_pending);
 316         else
 317                 atomic_inc(&card->rx_data_urb_pending);
 318
 319         if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
 320                 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
 321                 dev_kfree_skb_any(ctx->skb);
 322                 ctx->skb = NULL;
 323
 324                 if (card->rx_cmd_ep == ctx->ep)
 325                         atomic_dec(&card->rx_cmd_urb_pending);
 326                 else
 327                         atomic_dec(&card->rx_data_urb_pending);
 328
 329                 return -1;
 330         }
 331
 332         return 0;
 333 }
 334
 335 static void mwifiex_usb_free(struct usb_card_rec *card)
 336 {
 337         struct usb_tx_data_port *port;
 338         int i, j;
 339
 340         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 341                 usb_kill_urb(card->rx_cmd.urb);
 342
 343         usb_free_urb(card->rx_cmd.urb);
 344         card->rx_cmd.urb = NULL;
 345
 346         if (atomic_read(&card->rx_data_urb_pending))
 347                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 348                         if (card->rx_data_list[i].urb)
 349                                 usb_kill_urb(card->rx_data_list[i].urb);
 350
 351         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 352                 usb_free_urb(card->rx_data_list[i].urb);
 353                 card->rx_data_list[i].urb = NULL;
 354         }
 355
 356         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 357                 port = &card->port[i];
 358                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 359                         usb_free_urb(port->tx_data_list[j].urb);
 360                         port->tx_data_list[j].urb = NULL;
 361                 }
 362         }
 363
 364         usb_free_urb(card->tx_cmd.urb);
 365         card->tx_cmd.urb = NULL;
 366
 367         return;
 368 }
 369
 370 /* This function probes an mwifiex device and registers it. It allocates
 371  * the card structure, initiates the device registration and initialization
 372  * procedure by adding a logical interface.
 373  */
 374 static int mwifiex_usb_probe(struct usb_interface *intf,
 375                              const struct usb_device_id *id)
 376 {
 377         struct usb_device *udev = interface_to_usbdev(intf);
 378         struct usb_host_interface *iface_desc = intf->cur_altsetting;
 379         struct usb_endpoint_descriptor *epd;
 380         int ret, i;
 381         struct usb_card_rec *card;
 382         u16 id_vendor, id_product, bcd_device, bcd_usb;
 383
 384         card = devm_kzalloc(&intf->dev, sizeof(*card), GFP_KERNEL);
 385         if (!card)
 386                 return -ENOMEM;
 387
 388         init_completion(&card->fw_done);
 389
 390         id_vendor = le16_to_cpu(udev->descriptor.idVendor);
 391         id_product = le16_to_cpu(udev->descriptor.idProduct);
 392         bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
 393         bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
 394         pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
 395                  id_vendor, id_product, bcd_device);
 396
 397         /* PID_1 is used for firmware downloading only */
 398         switch (id_product) {
 399         case USB8766_PID_1:
 400         case USB8797_PID_1:
 401         case USB8801_PID_1:
 402         case USB8997_PID_1:
 403                 card->usb_boot_state = USB8XXX_FW_DNLD;
 404                 break;
 405         case USB8766_PID_2:
 406         case USB8797_PID_2:
 407         case USB8801_PID_2:
 408         case USB8997_PID_2:
 409                 card->usb_boot_state = USB8XXX_FW_READY;
 410                 break;
 411         default:
 412                 pr_warn("unknown id_product %#x\n", id_product);
 413                 card->usb_boot_state = USB8XXX_FW_DNLD;
 414                 break;
 415         }
 416
 417         card->udev = udev;
 418         card->intf = intf;
 419
 420         pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
 421                  udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
 422                  udev->descriptor.bDeviceSubClass,
 423                  udev->descriptor.bDeviceProtocol);
 424
 425         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 426                 epd = &iface_desc->endpoint[i].desc;
 427                 if (usb_endpoint_dir_in(epd) &&
 428                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 429                     usb_endpoint_xfer_bulk(epd)) {
 430                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 431                                  le16_to_cpu(epd->wMaxPacketSize),
 432                                  epd->bEndpointAddress);
 433                         card->rx_cmd_ep = usb_endpoint_num(epd);
 434                         atomic_set(&card->rx_cmd_urb_pending, 0);
 435                 }
 436                 if (usb_endpoint_dir_in(epd) &&
 437                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 438                     usb_endpoint_xfer_bulk(epd)) {
 439                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 440                                  le16_to_cpu(epd->wMaxPacketSize),
 441                                  epd->bEndpointAddress);
 442                         card->rx_data_ep = usb_endpoint_num(epd);
 443                         atomic_set(&card->rx_data_urb_pending, 0);
 444                 }
 445                 if (usb_endpoint_dir_out(epd) &&
 446                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 447                     usb_endpoint_xfer_bulk(epd)) {
 448                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 449                                  le16_to_cpu(epd->wMaxPacketSize),
 450                                  epd->bEndpointAddress);
 451                         card->port[0].tx_data_ep = usb_endpoint_num(epd);
 452                         atomic_set(&card->port[0].tx_data_urb_pending, 0);
 453                 }
 454                 if (usb_endpoint_dir_out(epd) &&
 455                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
 456                     usb_endpoint_xfer_bulk(epd)) {
 457                         pr_debug("info: bulk OUT chan2:\t"
 458                                  "max pkt size: %d, addr: %d\n",
 459                                  le16_to_cpu(epd->wMaxPacketSize),
 460                                  epd->bEndpointAddress);
 461                         card->port[1].tx_data_ep = usb_endpoint_num(epd);
 462                         atomic_set(&card->port[1].tx_data_urb_pending, 0);
 463                 }
 464                 if (usb_endpoint_dir_out(epd) &&
 465                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 466                     usb_endpoint_xfer_bulk(epd)) {
 467                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 468                                  le16_to_cpu(epd->wMaxPacketSize),
 469                                  epd->bEndpointAddress);
 470                         card->tx_cmd_ep = usb_endpoint_num(epd);
 471                         atomic_set(&card->tx_cmd_urb_pending, 0);
 472                         card->bulk_out_maxpktsize =
 473                                         le16_to_cpu(epd->wMaxPacketSize);
 474                 }
 475         }
 476
 477         usb_set_intfdata(intf, card);
 478
 479         ret = mwifiex_add_card(card, &card->fw_done, &usb_ops,
 480                                MWIFIEX_USB, &card->udev->dev);
 481         if (ret) {
 482                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
 483                 usb_reset_device(udev);
 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) {
 606                 dev_err(&intf->dev, "%s: card is NULL\n", __func__);
 607                 return;
 608         }
 609
 610         wait_for_completion(&card->fw_done);
 611
 612         adapter = card->adapter;
 613         if (!adapter || !adapter->priv_num)
 614                 return;
 615
 616         if (user_rmmod && !adapter->mfg_mode) {
 617 #ifdef CONFIG_PM
 618                 if (adapter->is_suspended)
 619                         mwifiex_usb_resume(intf);
 620 #endif
 621
 622                 mwifiex_deauthenticate_all(adapter);
 623
 624                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
 625                                                           MWIFIEX_BSS_ROLE_ANY),
 626                                          MWIFIEX_FUNC_SHUTDOWN);
 627         }
 628
 629         mwifiex_usb_free(card);
 630
 631         mwifiex_dbg(adapter, FATAL,
 632                     "%s: removing card\n", __func__);
 633         mwifiex_remove_card(adapter);
 634
 635         usb_put_dev(interface_to_usbdev(intf));
 636 }
 637
 638 static struct usb_driver mwifiex_usb_driver = {
 639         .name = "mwifiex_usb",
 640         .probe = mwifiex_usb_probe,
 641         .disconnect = mwifiex_usb_disconnect,
 642         .id_table = mwifiex_usb_table,
 643         .suspend = mwifiex_usb_suspend,
 644         .resume = mwifiex_usb_resume,
 645         .soft_unbind = 1,
 646 };
 647
 648 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
 649 {
 650         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 651         struct usb_tx_data_port *port;
 652         int i, j;
 653
 654         card->tx_cmd.adapter = adapter;
 655         card->tx_cmd.ep = card->tx_cmd_ep;
 656
 657         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 658         if (!card->tx_cmd.urb)
 659                 return -ENOMEM;
 660
 661         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 662                 port = &card->port[i];
 663                 if (!port->tx_data_ep)
 664                         continue;
 665                 port->tx_data_ix = 0;
 666                 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
 667                         port->block_status = false;
 668                 else
 669                         port->block_status = true;
 670                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 671                         port->tx_data_list[j].adapter = adapter;
 672                         port->tx_data_list[j].ep = port->tx_data_ep;
 673                         port->tx_data_list[j].urb =
 674                                         usb_alloc_urb(0, GFP_KERNEL);
 675                         if (!port->tx_data_list[j].urb)
 676                                 return -ENOMEM;
 677                 }
 678         }
 679
 680         return 0;
 681 }
 682
 683 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
 684 {
 685         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 686         int i;
 687
 688         card->rx_cmd.adapter = adapter;
 689         card->rx_cmd.ep = card->rx_cmd_ep;
 690
 691         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 692         if (!card->rx_cmd.urb)
 693                 return -ENOMEM;
 694
 695         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 696         if (!card->rx_cmd.skb)
 697                 return -ENOMEM;
 698
 699         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
 700                 return -1;
 701
 702         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 703                 card->rx_data_list[i].adapter = adapter;
 704                 card->rx_data_list[i].ep = card->rx_data_ep;
 705
 706                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
 707                 if (!card->rx_data_list[i].urb)
 708                         return -1;
 709                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 710                                               MWIFIEX_RX_DATA_BUF_SIZE))
 711                         return -1;
 712         }
 713
 714         return 0;
 715 }
 716
 717 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 718                                    u32 *len, u8 ep, u32 timeout)
 719 {
 720         struct usb_card_rec *card = adapter->card;
 721         int actual_length, ret;
 722
 723         if (!(*len % card->bulk_out_maxpktsize))
 724                 (*len)++;
 725
 726         /* Send the data block */
 727         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
 728                            *len, &actual_length, timeout);
 729         if (ret) {
 730                 mwifiex_dbg(adapter, ERROR,
 731                             "usb_bulk_msg for tx failed: %d\n", ret);
 732                 return ret;
 733         }
 734
 735         *len = actual_length;
 736
 737         return ret;
 738 }
 739
 740 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 741                                   u32 *len, u8 ep, u32 timeout)
 742 {
 743         struct usb_card_rec *card = adapter->card;
 744         int actual_length, ret;
 745
 746         /* Receive the data response */
 747         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
 748                            *len, &actual_length, timeout);
 749         if (ret) {
 750                 mwifiex_dbg(adapter, ERROR,
 751                             "usb_bulk_msg for rx failed: %d\n", ret);
 752                 return ret;
 753         }
 754
 755         *len = actual_length;
 756
 757         return ret;
 758 }
 759
 760 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
 761 {
 762         struct usb_card_rec *card = adapter->card;
 763         u8 active_port = MWIFIEX_USB_EP_DATA;
 764         struct mwifiex_private *priv = NULL;
 765         int i;
 766
 767         if (adapter->usb_mc_status) {
 768                 for (i = 0; i < adapter->priv_num; i++) {
 769                         priv = adapter->priv[i];
 770                         if (!priv)
 771                                 continue;
 772                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 773                              !priv->bss_started) ||
 774                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 775                              !priv->media_connected))
 776                                 priv->usb_port = MWIFIEX_USB_EP_DATA;
 777                 }
 778                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 779                         card->port[i].block_status = false;
 780         } else {
 781                 for (i = 0; i < adapter->priv_num; i++) {
 782                         priv = adapter->priv[i];
 783                         if (!priv)
 784                                 continue;
 785                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 786                              priv->bss_started) ||
 787                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 788                              priv->media_connected)) {
 789                                 active_port = priv->usb_port;
 790                                 break;
 791                         }
 792                 }
 793                 for (i = 0; i < adapter->priv_num; i++) {
 794                         priv = adapter->priv[i];
 795                         if (priv)
 796                                 priv->usb_port = active_port;
 797                 }
 798                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 799                         if (active_port == card->port[i].tx_data_ep)
 800                                 card->port[i].block_status = false;
 801                         else
 802                                 card->port[i].block_status = true;
 803                 }
 804         }
 805 }
 806
 807 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
 808 {
 809         struct usb_card_rec *card = priv->adapter->card;
 810         int idx;
 811
 812         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 813                 if (priv->usb_port == card->port[idx].tx_data_ep)
 814                         return !card->port[idx].block_status;
 815         }
 816
 817         return false;
 818 }
 819
 820 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
 821 {
 822         struct usb_card_rec *card = adapter->card;
 823         int i;
 824
 825         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 826                 if (!card->port[i].block_status)
 827                         return false;
 828
 829         return true;
 830 }
 831
 832 /* This function write a command/data packet to card. */
 833 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
 834                                     struct sk_buff *skb,
 835                                     struct mwifiex_tx_param *tx_param)
 836 {
 837         struct usb_card_rec *card = adapter->card;
 838         struct urb_context *context = NULL;
 839         struct usb_tx_data_port *port = NULL;
 840         u8 *data = (u8 *)skb->data;
 841         struct urb *tx_urb;
 842         int idx, ret = -EINPROGRESS;
 843
 844         if (adapter->is_suspended) {
 845                 mwifiex_dbg(adapter, ERROR,
 846                             "%s: not allowed while suspended\n", __func__);
 847                 return -1;
 848         }
 849
 850         if (adapter->surprise_removed) {
 851                 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
 852                 return -1;
 853         }
 854
 855         mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
 856
 857         if (ep == card->tx_cmd_ep) {
 858                 context = &card->tx_cmd;
 859         } else {
 860                 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 861                         if (ep == card->port[idx].tx_data_ep) {
 862                                 port = &card->port[idx];
 863                                 if (atomic_read(&port->tx_data_urb_pending)
 864                                     >= MWIFIEX_TX_DATA_URB) {
 865                                         port->block_status = true;
 866                                         adapter->data_sent =
 867                                                 mwifiex_usb_data_sent(adapter);
 868                                         return -EBUSY;
 869                                 }
 870                                 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
 871                                         port->tx_data_ix = 0;
 872                                 context =
 873                                         &port->tx_data_list[port->tx_data_ix++];
 874                                 break;
 875                         }
 876                 }
 877                 if (!port) {
 878                         mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
 879                         return -1;
 880                 }
 881         }
 882
 883         context->adapter = adapter;
 884         context->ep = ep;
 885         context->skb = skb;
 886         tx_urb = context->urb;
 887
 888         usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
 889                           data, skb->len, mwifiex_usb_tx_complete,
 890                           (void *)context);
 891
 892         tx_urb->transfer_flags |= URB_ZERO_PACKET;
 893
 894         if (ep == card->tx_cmd_ep)
 895                 atomic_inc(&card->tx_cmd_urb_pending);
 896         else
 897                 atomic_inc(&port->tx_data_urb_pending);
 898
 899         if (ep != card->tx_cmd_ep &&
 900             atomic_read(&port->tx_data_urb_pending) ==
 901                                         MWIFIEX_TX_DATA_URB) {
 902                 port->block_status = true;
 903                 adapter->data_sent = mwifiex_usb_data_sent(adapter);
 904                 ret = -ENOSR;
 905         }
 906
 907         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
 908                 mwifiex_dbg(adapter, ERROR,
 909                             "%s: usb_submit_urb failed\n", __func__);
 910                 if (ep == card->tx_cmd_ep) {
 911                         atomic_dec(&card->tx_cmd_urb_pending);
 912                 } else {
 913                         atomic_dec(&port->tx_data_urb_pending);
 914                         port->block_status = false;
 915                         adapter->data_sent = false;
 916                         if (port->tx_data_ix)
 917                                 port->tx_data_ix--;
 918                         else
 919                                 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
 920                 }
 921                 ret = -1;
 922         }
 923
 924         return ret;
 925 }
 926
 927 /* This function register usb device and initialize parameter. */
 928 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
 929 {
 930         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 931
 932         card->adapter = adapter;
 933
 934         switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
 935         case USB8997_PID_1:
 936         case USB8997_PID_2:
 937                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 938                 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
 939                 adapter->ext_scan = true;
 940                 break;
 941         case USB8766_PID_1:
 942         case USB8766_PID_2:
 943                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 944                 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
 945                 adapter->ext_scan = true;
 946                 break;
 947         case USB8801_PID_1:
 948         case USB8801_PID_2:
 949                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 950                 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
 951                 adapter->ext_scan = false;
 952                 break;
 953         case USB8797_PID_1:
 954         case USB8797_PID_2:
 955         default:
 956                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 957                 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
 958                 break;
 959         }
 960
 961         adapter->usb_mc_status = false;
 962         adapter->usb_mc_setup = false;
 963
 964         return 0;
 965 }
 966
 967 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
 968 {
 969         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 970
 971         card->adapter = NULL;
 972 }
 973
 974 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 975                                     struct mwifiex_fw_image *fw)
 976 {
 977         int ret = 0;
 978         u8 *firmware = fw->fw_buf, *recv_buff;
 979         u32 retries = USB8XXX_FW_MAX_RETRY + 1;
 980         u32 dlen;
 981         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
 982         struct fw_data *fwdata;
 983         struct fw_sync_header sync_fw;
 984         u8 check_winner = 1;
 985
 986         if (!firmware) {
 987                 mwifiex_dbg(adapter, ERROR,
 988                             "No firmware image found! Terminating download\n");
 989                 ret = -1;
 990                 goto fw_exit;
 991         }
 992
 993         /* Allocate memory for transmit */
 994         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
 995         if (!fwdata) {
 996                 ret = -ENOMEM;
 997                 goto fw_exit;
 998         }
 999
1000         /* Allocate memory for receive */
1001         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1002         if (!recv_buff) {
1003                 ret = -ENOMEM;
1004                 goto cleanup;
1005         }
1006
1007         do {
1008                 /* Send pseudo data to check winner status first */
1009                 if (check_winner) {
1010                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1011                         dlen = 0;
1012                 } else {
1013                         /* copy the header of the fw_data to get the length */
1014                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
1015                                sizeof(struct fw_header));
1016
1017                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1018                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1019                         tlen += sizeof(struct fw_header);
1020
1021                         /* Command 7 doesn't have data length field */
1022                         if (dnld_cmd == FW_CMD_7)
1023                                 dlen = 0;
1024
1025                         memcpy(fwdata->data, &firmware[tlen], dlen);
1026
1027                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
1028                         tlen += dlen;
1029                 }
1030
1031                 /* If the send/receive fails or CRC occurs then retry */
1032                 while (--retries) {
1033                         u8 *buf = (u8 *)fwdata;
1034                         u32 len = FW_DATA_XMIT_SIZE;
1035
1036                         /* send the firmware block */
1037                         ret = mwifiex_write_data_sync(adapter, buf, &len,
1038                                                 MWIFIEX_USB_EP_CMD_EVENT,
1039                                                 MWIFIEX_USB_TIMEOUT);
1040                         if (ret) {
1041                                 mwifiex_dbg(adapter, ERROR,
1042                                             "write_data_sync: failed: %d\n",
1043                                             ret);
1044                                 continue;
1045                         }
1046
1047                         buf = recv_buff;
1048                         len = FW_DNLD_RX_BUF_SIZE;
1049
1050                         /* Receive the firmware block response */
1051                         ret = mwifiex_read_data_sync(adapter, buf, &len,
1052                                                 MWIFIEX_USB_EP_CMD_EVENT,
1053                                                 MWIFIEX_USB_TIMEOUT);
1054                         if (ret) {
1055                                 mwifiex_dbg(adapter, ERROR,
1056                                             "read_data_sync: failed: %d\n",
1057                                             ret);
1058                                 continue;
1059                         }
1060
1061                         memcpy(&sync_fw, recv_buff,
1062                                sizeof(struct fw_sync_header));
1063
1064                         /* check 1st firmware block resp for highest bit set */
1065                         if (check_winner) {
1066                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1067                                         mwifiex_dbg(adapter, WARN,
1068                                                     "USB is not the winner %#x\n",
1069                                                     sync_fw.cmd);
1070
1071                                         /* returning success */
1072                                         ret = 0;
1073                                         goto cleanup;
1074                                 }
1075
1076                                 mwifiex_dbg(adapter, MSG,
1077                                             "start to download FW...\n");
1078
1079                                 check_winner = 0;
1080                                 break;
1081                         }
1082
1083                         /* check the firmware block response for CRC errors */
1084                         if (sync_fw.cmd) {
1085                                 mwifiex_dbg(adapter, ERROR,
1086                                             "FW received block with CRC %#x\n",
1087                                             sync_fw.cmd);
1088                                 ret = -1;
1089                                 continue;
1090                         }
1091
1092                         retries = USB8XXX_FW_MAX_RETRY + 1;
1093                         break;
1094                 }
1095                 fw_seqnum++;
1096         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1097
1098 cleanup:
1099         mwifiex_dbg(adapter, MSG,
1100                     "info: FW download over, size %d bytes\n", tlen);
1101
1102         kfree(recv_buff);
1103         kfree(fwdata);
1104
1105         if (retries)
1106                 ret = 0;
1107 fw_exit:
1108         return ret;
1109 }
1110
1111 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1112                         struct mwifiex_fw_image *fw)
1113 {
1114         int ret;
1115         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1116
1117         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1118                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1119                 if (ret)
1120                         return -1;
1121
1122                 /* Boot state changes after successful firmware download */
1123                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1124                         return -1;
1125         }
1126
1127         ret = mwifiex_usb_rx_init(adapter);
1128         if (!ret)
1129                 ret = mwifiex_usb_tx_init(adapter);
1130
1131         return ret;
1132 }
1133
1134 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1135 {
1136         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1137
1138         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1139         if ((ep == card->rx_cmd_ep) &&
1140             (!atomic_read(&card->rx_cmd_urb_pending)))
1141                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1142                                           MWIFIEX_RX_CMD_BUF_SIZE);
1143
1144         return;
1145 }
1146
1147 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1148                                        struct sk_buff *skb)
1149 {
1150         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1151
1152         return 0;
1153 }
1154
1155 /* This function wakes up the card. */
1156 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1157 {
1158         /* Simulation of HS_AWAKE event */
1159         adapter->pm_wakeup_fw_try = false;
1160         del_timer(&adapter->wakeup_timer);
1161         adapter->pm_wakeup_card_req = false;
1162         adapter->ps_state = PS_STATE_AWAKE;
1163
1164         return 0;
1165 }
1166
1167 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1168 {
1169         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1170         int i;
1171         struct urb_context *ctx;
1172
1173         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1174                 if (card->rx_data_list[i].skb)
1175                         continue;
1176                 ctx = &card->rx_data_list[i];
1177                 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1178         }
1179 }
1180
1181 /* This function is called after the card has woken up. */
1182 static inline int
1183 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1184 {
1185         return 0;
1186 }
1187
1188 static struct mwifiex_if_ops usb_ops = {
1189         .register_dev =         mwifiex_register_dev,
1190         .unregister_dev =       mwifiex_unregister_dev,
1191         .wakeup =               mwifiex_pm_wakeup_card,
1192         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
1193
1194         /* USB specific */
1195         .dnld_fw =              mwifiex_usb_dnld_fw,
1196         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
1197         .event_complete =       mwifiex_usb_cmd_event_complete,
1198         .host_to_card =         mwifiex_usb_host_to_card,
1199         .submit_rem_rx_urbs =   mwifiex_usb_submit_rem_rx_urbs,
1200         .multi_port_resync =    mwifiex_usb_port_resync,
1201         .is_port_ready =        mwifiex_usb_is_port_ready,
1202 };
1203
1204 /* This function initializes the USB driver module.
1205  *
1206  * This registers the device with USB bus.
1207  */
1208 static int mwifiex_usb_init_module(void)
1209 {
1210         int ret;
1211
1212         pr_debug("Marvell USB8797 Driver\n");
1213
1214         ret = usb_register(&mwifiex_usb_driver);
1215         if (ret)
1216                 pr_err("Driver register failed!\n");
1217         else
1218                 pr_debug("info: Driver registered successfully!\n");
1219
1220         return ret;
1221 }
1222
1223 /* This function cleans up the USB driver.
1224  *
1225  * The following major steps are followed in .disconnect for cleanup:
1226  *      - Resume the device if its suspended
1227  *      - Disconnect the device if connected
1228  *      - Shutdown the firmware
1229  *      - Unregister the device from USB bus.
1230  */
1231 static void mwifiex_usb_cleanup_module(void)
1232 {
1233         /* set the flag as user is removing this module */
1234         user_rmmod = 1;
1235
1236         usb_deregister(&mwifiex_usb_driver);
1237 }
1238
1239 module_init(mwifiex_usb_init_module);
1240 module_exit(mwifiex_usb_cleanup_module);
1241
1242 MODULE_AUTHOR("Marvell International Ltd.");
1243 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1244 MODULE_VERSION(USB_VERSION);
1245 MODULE_LICENSE("GPL v2");
1246 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1247 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1248 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1249 MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);