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 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                 mwifiex_write_data_complete(adapter, context->skb, 0,
 277                                             urb->status ? -1 : 0);
 278                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 279                         port = &card->port[i];
 280                         if (context->ep == port->tx_data_ep) {
 281                                 atomic_dec(&port->tx_data_urb_pending);
 282                                 port->block_status = false;
 283                                 break;
 284                         }
 285                 }
 286                 adapter->data_sent = false;
 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         switch (card->usb_boot_state) {
 477         case USB8XXX_FW_DNLD:
 478                 /* Reject broken descriptors. */
 479                 if (!card->rx_cmd_ep || !card->tx_cmd_ep)
 480                         return -ENODEV;
 481                 if (card->bulk_out_maxpktsize == 0)
 482                         return -ENODEV;
 483                 break;
 484         case USB8XXX_FW_READY:
 485                 /* Assume the driver can handle missing endpoints for now. */
 486                 break;
 487         default:
 488                 WARN_ON(1);
 489                 return -ENODEV;
 490         }
 491
 492         usb_set_intfdata(intf, card);
 493
 494         ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
 495                                MWIFIEX_USB);
 496         if (ret) {
 497                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
 498                 usb_reset_device(udev);
 499                 kfree(card);
 500                 return ret;
 501         }
 502
 503         usb_get_dev(udev);
 504
 505         return 0;
 506 }
 507
 508 /* Kernel needs to suspend all functions separately. Therefore all
 509  * registered functions must have drivers with suspend and resume
 510  * methods. Failing that the kernel simply removes the whole card.
 511  *
 512  * If already not suspended, this function allocates and sends a
 513  * 'host sleep activate' request to the firmware and turns off the traffic.
 514  */
 515 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
 516 {
 517         struct usb_card_rec *card = usb_get_intfdata(intf);
 518         struct mwifiex_adapter *adapter;
 519         struct usb_tx_data_port *port;
 520         int i, j;
 521
 522         if (!card || !card->adapter) {
 523                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 524                 return 0;
 525         }
 526         adapter = card->adapter;
 527
 528         if (unlikely(adapter->is_suspended))
 529                 mwifiex_dbg(adapter, WARN,
 530                             "Device already suspended\n");
 531
 532         mwifiex_enable_hs(adapter);
 533
 534         /* 'is_suspended' flag indicates device is suspended.
 535          * It must be set here before the usb_kill_urb() calls. Reason
 536          * is in the complete handlers, urb->status(= -ENOENT) and
 537          * this flag is used in combination to distinguish between a
 538          * 'suspended' state and a 'disconnect' one.
 539          */
 540         adapter->is_suspended = true;
 541         adapter->hs_enabling = false;
 542
 543         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 544                 usb_kill_urb(card->rx_cmd.urb);
 545
 546         if (atomic_read(&card->rx_data_urb_pending))
 547                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 548                         if (card->rx_data_list[i].urb)
 549                                 usb_kill_urb(card->rx_data_list[i].urb);
 550
 551         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 552                 port = &card->port[i];
 553                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 554                         if (port->tx_data_list[j].urb)
 555                                 usb_kill_urb(port->tx_data_list[j].urb);
 556                 }
 557         }
 558
 559         if (card->tx_cmd.urb)
 560                 usb_kill_urb(card->tx_cmd.urb);
 561
 562         return 0;
 563 }
 564
 565 /* Kernel needs to suspend all functions separately. Therefore all
 566  * registered functions must have drivers with suspend and resume
 567  * methods. Failing that the kernel simply removes the whole card.
 568  *
 569  * If already not resumed, this function turns on the traffic and
 570  * sends a 'host sleep cancel' request to the firmware.
 571  */
 572 static int mwifiex_usb_resume(struct usb_interface *intf)
 573 {
 574         struct usb_card_rec *card = usb_get_intfdata(intf);
 575         struct mwifiex_adapter *adapter;
 576         int i;
 577
 578         if (!card || !card->adapter) {
 579                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 580                 return 0;
 581         }
 582         adapter = card->adapter;
 583
 584         if (unlikely(!adapter->is_suspended)) {
 585                 mwifiex_dbg(adapter, WARN,
 586                             "Device already resumed\n");
 587                 return 0;
 588         }
 589
 590         /* Indicate device resumed. The netdev queue will be resumed only
 591          * after the urbs have been re-submitted
 592          */
 593         adapter->is_suspended = false;
 594
 595         if (!atomic_read(&card->rx_data_urb_pending))
 596                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 597                         mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 598                                                   MWIFIEX_RX_DATA_BUF_SIZE);
 599
 600         if (!atomic_read(&card->rx_cmd_urb_pending)) {
 601                 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 602                 if (card->rx_cmd.skb)
 603                         mwifiex_usb_submit_rx_urb(&card->rx_cmd,
 604                                                   MWIFIEX_RX_CMD_BUF_SIZE);
 605         }
 606
 607         /* Disable Host Sleep */
 608         if (adapter->hs_activated)
 609                 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
 610                                                    MWIFIEX_BSS_ROLE_ANY),
 611                                   MWIFIEX_ASYNC_CMD);
 612
 613         return 0;
 614 }
 615
 616 static void mwifiex_usb_disconnect(struct usb_interface *intf)
 617 {
 618         struct usb_card_rec *card = usb_get_intfdata(intf);
 619         struct mwifiex_adapter *adapter;
 620
 621         if (!card || !card->adapter) {
 622                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 623                 return;
 624         }
 625
 626         adapter = card->adapter;
 627         if (!adapter->priv_num)
 628                 return;
 629
 630         if (user_rmmod && !adapter->mfg_mode) {
 631 #ifdef CONFIG_PM
 632                 if (adapter->is_suspended)
 633                         mwifiex_usb_resume(intf);
 634 #endif
 635
 636                 mwifiex_deauthenticate_all(adapter);
 637
 638                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
 639                                                           MWIFIEX_BSS_ROLE_ANY),
 640                                          MWIFIEX_FUNC_SHUTDOWN);
 641         }
 642
 643         if (adapter->workqueue)
 644                 flush_workqueue(adapter->workqueue);
 645
 646         mwifiex_usb_free(card);
 647
 648         mwifiex_dbg(adapter, FATAL,
 649                     "%s: removing card\n", __func__);
 650         mwifiex_remove_card(adapter, &add_remove_card_sem);
 651
 652         usb_set_intfdata(intf, NULL);
 653         usb_put_dev(interface_to_usbdev(intf));
 654         kfree(card);
 655
 656         return;
 657 }
 658
 659 static struct usb_driver mwifiex_usb_driver = {
 660         .name = "mwifiex_usb",
 661         .probe = mwifiex_usb_probe,
 662         .disconnect = mwifiex_usb_disconnect,
 663         .id_table = mwifiex_usb_table,
 664         .suspend = mwifiex_usb_suspend,
 665         .resume = mwifiex_usb_resume,
 666         .soft_unbind = 1,
 667 };
 668
 669 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
 670 {
 671         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 672         struct usb_tx_data_port *port;
 673         int i, j;
 674
 675         card->tx_cmd.adapter = adapter;
 676         card->tx_cmd.ep = card->tx_cmd_ep;
 677
 678         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 679         if (!card->tx_cmd.urb)
 680                 return -ENOMEM;
 681
 682         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 683                 port = &card->port[i];
 684                 if (!port->tx_data_ep)
 685                         continue;
 686                 port->tx_data_ix = 0;
 687                 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
 688                         port->block_status = false;
 689                 else
 690                         port->block_status = true;
 691                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 692                         port->tx_data_list[j].adapter = adapter;
 693                         port->tx_data_list[j].ep = port->tx_data_ep;
 694                         port->tx_data_list[j].urb =
 695                                         usb_alloc_urb(0, GFP_KERNEL);
 696                         if (!port->tx_data_list[j].urb)
 697                                 return -ENOMEM;
 698                 }
 699         }
 700
 701         return 0;
 702 }
 703
 704 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
 705 {
 706         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 707         int i;
 708
 709         card->rx_cmd.adapter = adapter;
 710         card->rx_cmd.ep = card->rx_cmd_ep;
 711
 712         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 713         if (!card->rx_cmd.urb)
 714                 return -ENOMEM;
 715
 716         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 717         if (!card->rx_cmd.skb)
 718                 return -ENOMEM;
 719
 720         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
 721                 return -1;
 722
 723         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 724                 card->rx_data_list[i].adapter = adapter;
 725                 card->rx_data_list[i].ep = card->rx_data_ep;
 726
 727                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
 728                 if (!card->rx_data_list[i].urb)
 729                         return -1;
 730                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 731                                               MWIFIEX_RX_DATA_BUF_SIZE))
 732                         return -1;
 733         }
 734
 735         return 0;
 736 }
 737
 738 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 739                                    u32 *len, u8 ep, u32 timeout)
 740 {
 741         struct usb_card_rec *card = adapter->card;
 742         int actual_length, ret;
 743
 744         if (!(*len % card->bulk_out_maxpktsize))
 745                 (*len)++;
 746
 747         /* Send the data block */
 748         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
 749                            *len, &actual_length, timeout);
 750         if (ret) {
 751                 mwifiex_dbg(adapter, ERROR,
 752                             "usb_bulk_msg for tx failed: %d\n", ret);
 753                 return ret;
 754         }
 755
 756         *len = actual_length;
 757
 758         return ret;
 759 }
 760
 761 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 762                                   u32 *len, u8 ep, u32 timeout)
 763 {
 764         struct usb_card_rec *card = adapter->card;
 765         int actual_length, ret;
 766
 767         /* Receive the data response */
 768         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
 769                            *len, &actual_length, timeout);
 770         if (ret) {
 771                 mwifiex_dbg(adapter, ERROR,
 772                             "usb_bulk_msg for rx failed: %d\n", ret);
 773                 return ret;
 774         }
 775
 776         *len = actual_length;
 777
 778         return ret;
 779 }
 780
 781 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
 782 {
 783         struct usb_card_rec *card = adapter->card;
 784         u8 active_port = MWIFIEX_USB_EP_DATA;
 785         struct mwifiex_private *priv = NULL;
 786         int i;
 787
 788         if (adapter->usb_mc_status) {
 789                 for (i = 0; i < adapter->priv_num; i++) {
 790                         priv = adapter->priv[i];
 791                         if (!priv)
 792                                 continue;
 793                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 794                              !priv->bss_started) ||
 795                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 796                              !priv->media_connected))
 797                                 priv->usb_port = MWIFIEX_USB_EP_DATA;
 798                 }
 799                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 800                         card->port[i].block_status = false;
 801         } else {
 802                 for (i = 0; i < adapter->priv_num; i++) {
 803                         priv = adapter->priv[i];
 804                         if (!priv)
 805                                 continue;
 806                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 807                              priv->bss_started) ||
 808                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 809                              priv->media_connected)) {
 810                                 active_port = priv->usb_port;
 811                                 break;
 812                         }
 813                 }
 814                 for (i = 0; i < adapter->priv_num; i++) {
 815                         priv = adapter->priv[i];
 816                         if (priv)
 817                                 priv->usb_port = active_port;
 818                 }
 819                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 820                         if (active_port == card->port[i].tx_data_ep)
 821                                 card->port[i].block_status = false;
 822                         else
 823                                 card->port[i].block_status = true;
 824                 }
 825         }
 826 }
 827
 828 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
 829 {
 830         struct usb_card_rec *card = priv->adapter->card;
 831         int idx;
 832
 833         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 834                 if (priv->usb_port == card->port[idx].tx_data_ep)
 835                         return !card->port[idx].block_status;
 836         }
 837
 838         return false;
 839 }
 840
 841 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
 842 {
 843         struct usb_card_rec *card = adapter->card;
 844         int i;
 845
 846         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 847                 if (!card->port[i].block_status)
 848                         return false;
 849
 850         return true;
 851 }
 852
 853 /* This function write a command/data packet to card. */
 854 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
 855                                     struct sk_buff *skb,
 856                                     struct mwifiex_tx_param *tx_param)
 857 {
 858         struct usb_card_rec *card = adapter->card;
 859         struct urb_context *context = NULL;
 860         struct usb_tx_data_port *port = NULL;
 861         u8 *data = (u8 *)skb->data;
 862         struct urb *tx_urb;
 863         int idx, ret = -EINPROGRESS;
 864
 865         if (adapter->is_suspended) {
 866                 mwifiex_dbg(adapter, ERROR,
 867                             "%s: not allowed while suspended\n", __func__);
 868                 return -1;
 869         }
 870
 871         if (adapter->surprise_removed) {
 872                 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
 873                 return -1;
 874         }
 875
 876         mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
 877
 878         if (ep == card->tx_cmd_ep) {
 879                 context = &card->tx_cmd;
 880         } else {
 881                 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 882                         if (ep == card->port[idx].tx_data_ep) {
 883                                 port = &card->port[idx];
 884                                 if (atomic_read(&port->tx_data_urb_pending)
 885                                     >= MWIFIEX_TX_DATA_URB) {
 886                                         port->block_status = true;
 887                                         adapter->data_sent =
 888                                                 mwifiex_usb_data_sent(adapter);
 889                                         return -EBUSY;
 890                                 }
 891                                 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
 892                                         port->tx_data_ix = 0;
 893                                 context =
 894                                         &port->tx_data_list[port->tx_data_ix++];
 895                                 break;
 896                         }
 897                 }
 898                 if (!port) {
 899                         mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
 900                         return -1;
 901                 }
 902         }
 903
 904         context->adapter = adapter;
 905         context->ep = ep;
 906         context->skb = skb;
 907         tx_urb = context->urb;
 908
 909         usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
 910                           data, skb->len, mwifiex_usb_tx_complete,
 911                           (void *)context);
 912
 913         tx_urb->transfer_flags |= URB_ZERO_PACKET;
 914
 915         if (ep == card->tx_cmd_ep)
 916                 atomic_inc(&card->tx_cmd_urb_pending);
 917         else
 918                 atomic_inc(&port->tx_data_urb_pending);
 919
 920         if (ep != card->tx_cmd_ep &&
 921             atomic_read(&port->tx_data_urb_pending) ==
 922                                         MWIFIEX_TX_DATA_URB) {
 923                 port->block_status = true;
 924                 adapter->data_sent = mwifiex_usb_data_sent(adapter);
 925                 ret = -ENOSR;
 926         }
 927
 928         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
 929                 mwifiex_dbg(adapter, ERROR,
 930                             "%s: usb_submit_urb failed\n", __func__);
 931                 if (ep == card->tx_cmd_ep) {
 932                         atomic_dec(&card->tx_cmd_urb_pending);
 933                 } else {
 934                         atomic_dec(&port->tx_data_urb_pending);
 935                         port->block_status = false;
 936                         adapter->data_sent = false;
 937                         if (port->tx_data_ix)
 938                                 port->tx_data_ix--;
 939                         else
 940                                 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
 941                 }
 942                 ret = -1;
 943         }
 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 + 1;
1002         u32 dlen;
1003         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1004         struct fw_data *fwdata;
1005         struct fw_sync_header sync_fw;
1006         u8 check_winner = 1;
1007
1008         if (!firmware) {
1009                 mwifiex_dbg(adapter, ERROR,
1010                             "No firmware image found! Terminating download\n");
1011                 ret = -1;
1012                 goto fw_exit;
1013         }
1014
1015         /* Allocate memory for transmit */
1016         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1017         if (!fwdata) {
1018                 ret = -ENOMEM;
1019                 goto fw_exit;
1020         }
1021
1022         /* Allocate memory for receive */
1023         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1024         if (!recv_buff) {
1025                 ret = -ENOMEM;
1026                 goto cleanup;
1027         }
1028
1029         do {
1030                 /* Send pseudo data to check winner status first */
1031                 if (check_winner) {
1032                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1033                         dlen = 0;
1034                 } else {
1035                         /* copy the header of the fw_data to get the length */
1036                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
1037                                sizeof(struct fw_header));
1038
1039                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1040                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1041                         tlen += sizeof(struct fw_header);
1042
1043                         /* Command 7 doesn't have data length field */
1044                         if (dnld_cmd == FW_CMD_7)
1045                                 dlen = 0;
1046
1047                         memcpy(fwdata->data, &firmware[tlen], dlen);
1048
1049                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
1050                         tlen += dlen;
1051                 }
1052
1053                 /* If the send/receive fails or CRC occurs then retry */
1054                 while (--retries) {
1055                         u8 *buf = (u8 *)fwdata;
1056                         u32 len = FW_DATA_XMIT_SIZE;
1057
1058                         /* send the firmware block */
1059                         ret = mwifiex_write_data_sync(adapter, buf, &len,
1060                                                 MWIFIEX_USB_EP_CMD_EVENT,
1061                                                 MWIFIEX_USB_TIMEOUT);
1062                         if (ret) {
1063                                 mwifiex_dbg(adapter, ERROR,
1064                                             "write_data_sync: failed: %d\n",
1065                                             ret);
1066                                 continue;
1067                         }
1068
1069                         buf = recv_buff;
1070                         len = FW_DNLD_RX_BUF_SIZE;
1071
1072                         /* Receive the firmware block response */
1073                         ret = mwifiex_read_data_sync(adapter, buf, &len,
1074                                                 MWIFIEX_USB_EP_CMD_EVENT,
1075                                                 MWIFIEX_USB_TIMEOUT);
1076                         if (ret) {
1077                                 mwifiex_dbg(adapter, ERROR,
1078                                             "read_data_sync: failed: %d\n",
1079                                             ret);
1080                                 continue;
1081                         }
1082
1083                         memcpy(&sync_fw, recv_buff,
1084                                sizeof(struct fw_sync_header));
1085
1086                         /* check 1st firmware block resp for highest bit set */
1087                         if (check_winner) {
1088                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1089                                         mwifiex_dbg(adapter, WARN,
1090                                                     "USB is not the winner %#x\n",
1091                                                     sync_fw.cmd);
1092
1093                                         /* returning success */
1094                                         ret = 0;
1095                                         goto cleanup;
1096                                 }
1097
1098                                 mwifiex_dbg(adapter, MSG,
1099                                             "start to download FW...\n");
1100
1101                                 check_winner = 0;
1102                                 break;
1103                         }
1104
1105                         /* check the firmware block response for CRC errors */
1106                         if (sync_fw.cmd) {
1107                                 mwifiex_dbg(adapter, ERROR,
1108                                             "FW received block with CRC %#x\n",
1109                                             sync_fw.cmd);
1110                                 ret = -1;
1111                                 continue;
1112                         }
1113
1114                         retries = USB8XXX_FW_MAX_RETRY + 1;
1115                         break;
1116                 }
1117                 fw_seqnum++;
1118         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1119
1120 cleanup:
1121         mwifiex_dbg(adapter, MSG,
1122                     "info: FW download over, size %d bytes\n", tlen);
1123
1124         kfree(recv_buff);
1125         kfree(fwdata);
1126
1127         if (retries)
1128                 ret = 0;
1129 fw_exit:
1130         return ret;
1131 }
1132
1133 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1134                         struct mwifiex_fw_image *fw)
1135 {
1136         int ret;
1137         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1138
1139         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1140                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1141                 if (ret)
1142                         return -1;
1143
1144                 /* Boot state changes after successful firmware download */
1145                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1146                         return -1;
1147         }
1148
1149         ret = mwifiex_usb_rx_init(adapter);
1150         if (!ret)
1151                 ret = mwifiex_usb_tx_init(adapter);
1152
1153         return ret;
1154 }
1155
1156 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1157 {
1158         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1159
1160         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1161         if ((ep == card->rx_cmd_ep) &&
1162             (!atomic_read(&card->rx_cmd_urb_pending)))
1163                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1164                                           MWIFIEX_RX_CMD_BUF_SIZE);
1165
1166         return;
1167 }
1168
1169 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1170                                        struct sk_buff *skb)
1171 {
1172         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1173
1174         return 0;
1175 }
1176
1177 /* This function wakes up the card. */
1178 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1179 {
1180         /* Simulation of HS_AWAKE event */
1181         adapter->pm_wakeup_fw_try = false;
1182         del_timer(&adapter->wakeup_timer);
1183         adapter->pm_wakeup_card_req = false;
1184         adapter->ps_state = PS_STATE_AWAKE;
1185
1186         return 0;
1187 }
1188
1189 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1190 {
1191         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1192         int i;
1193         struct urb_context *ctx;
1194
1195         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1196                 if (card->rx_data_list[i].skb)
1197                         continue;
1198                 ctx = &card->rx_data_list[i];
1199                 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1200         }
1201 }
1202
1203 /* This function is called after the card has woken up. */
1204 static inline int
1205 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1206 {
1207         return 0;
1208 }
1209
1210 static struct mwifiex_if_ops usb_ops = {
1211         .register_dev =         mwifiex_register_dev,
1212         .unregister_dev =       mwifiex_unregister_dev,
1213         .wakeup =               mwifiex_pm_wakeup_card,
1214         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
1215
1216         /* USB specific */
1217         .dnld_fw =              mwifiex_usb_dnld_fw,
1218         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
1219         .event_complete =       mwifiex_usb_cmd_event_complete,
1220         .host_to_card =         mwifiex_usb_host_to_card,
1221         .submit_rem_rx_urbs =   mwifiex_usb_submit_rem_rx_urbs,
1222         .multi_port_resync =    mwifiex_usb_port_resync,
1223         .is_port_ready =        mwifiex_usb_is_port_ready,
1224 };
1225
1226 /* This function initializes the USB driver module.
1227  *
1228  * This initiates the semaphore and registers the device with
1229  * USB bus.
1230  */
1231 static int mwifiex_usb_init_module(void)
1232 {
1233         int ret;
1234
1235         pr_debug("Marvell USB8797 Driver\n");
1236
1237         sema_init(&add_remove_card_sem, 1);
1238
1239         ret = usb_register(&mwifiex_usb_driver);
1240         if (ret)
1241                 pr_err("Driver register failed!\n");
1242         else
1243                 pr_debug("info: Driver registered successfully!\n");
1244
1245         return ret;
1246 }
1247
1248 /* This function cleans up the USB driver.
1249  *
1250  * The following major steps are followed in .disconnect for cleanup:
1251  *      - Resume the device if its suspended
1252  *      - Disconnect the device if connected
1253  *      - Shutdown the firmware
1254  *      - Unregister the device from USB bus.
1255  */
1256 static void mwifiex_usb_cleanup_module(void)
1257 {
1258         if (!down_interruptible(&add_remove_card_sem))
1259                 up(&add_remove_card_sem);
1260
1261         /* set the flag as user is removing this module */
1262         user_rmmod = 1;
1263
1264         usb_deregister(&mwifiex_usb_driver);
1265 }
1266
1267 module_init(mwifiex_usb_init_module);
1268 module_exit(mwifiex_usb_cleanup_module);
1269
1270 MODULE_AUTHOR("Marvell International Ltd.");
1271 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1272 MODULE_VERSION(USB_VERSION);
1273 MODULE_LICENSE("GPL v2");
1274 /*(DEBLOBBED)*/