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                         ret = -1;
 136                         goto exit_restore_skb;
 137                 }
 138                 break;
 139         case MWIFIEX_USB_EP_DATA:
 140                 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
 141                 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
 142                         mwifiex_dbg(adapter, ERROR,
 143                                     "DATA: skb->len too large\n");
 144                         return -1;
 145                 }
 146
 147                 skb_queue_tail(&adapter->rx_data_q, skb);
 148                 adapter->data_received = true;
 149                 atomic_inc(&adapter->rx_pending);
 150                 break;
 151         default:
 152                 mwifiex_dbg(adapter, ERROR,
 153                             "%s: unknown endport %#x\n", __func__, ep);
 154                 return -1;
 155         }
 156
 157         return -EINPROGRESS;
 158
 159 exit_restore_skb:
 160         /* The buffer will be reused for further cmds/events */
 161         skb_push(skb, INTF_HEADER_LEN);
 162
 163         return ret;
 164 }
 165
 166 static void mwifiex_usb_rx_complete(struct urb *urb)
 167 {
 168         struct urb_context *context = (struct urb_context *)urb->context;
 169         struct mwifiex_adapter *adapter = context->adapter;
 170         struct sk_buff *skb = context->skb;
 171         struct usb_card_rec *card;
 172         int recv_length = urb->actual_length;
 173         int size, status;
 174
 175         if (!adapter || !adapter->card) {
 176                 pr_err("mwifiex adapter or card structure is not valid\n");
 177                 return;
 178         }
 179
 180         card = (struct usb_card_rec *)adapter->card;
 181         if (card->rx_cmd_ep == context->ep)
 182                 atomic_dec(&card->rx_cmd_urb_pending);
 183         else
 184                 atomic_dec(&card->rx_data_urb_pending);
 185
 186         if (recv_length) {
 187                 if (urb->status || (adapter->surprise_removed)) {
 188                         mwifiex_dbg(adapter, ERROR,
 189                                     "URB status is failed: %d\n", urb->status);
 190                         /* Do not free skb in case of command ep */
 191                         if (card->rx_cmd_ep != context->ep)
 192                                 dev_kfree_skb_any(skb);
 193                         goto setup_for_next;
 194                 }
 195                 if (skb->len > recv_length)
 196                         skb_trim(skb, recv_length);
 197                 else
 198                         skb_put(skb, recv_length - skb->len);
 199
 200                 status = mwifiex_usb_recv(adapter, skb, context->ep);
 201
 202                 mwifiex_dbg(adapter, INFO,
 203                             "info: recv_length=%d, status=%d\n",
 204                             recv_length, status);
 205                 if (status == -EINPROGRESS) {
 206                         mwifiex_queue_main_work(adapter);
 207
 208                         /* urb for data_ep is re-submitted now;
 209                          * urb for cmd_ep will be re-submitted in callback
 210                          * mwifiex_usb_recv_complete
 211                          */
 212                         if (card->rx_cmd_ep == context->ep)
 213                                 return;
 214                 } else {
 215                         if (status == -1)
 216                                 mwifiex_dbg(adapter, ERROR,
 217                                             "received data processing failed!\n");
 218
 219                         /* Do not free skb in case of command ep */
 220                         if (card->rx_cmd_ep != context->ep)
 221                                 dev_kfree_skb_any(skb);
 222                 }
 223         } else if (urb->status) {
 224                 if (!adapter->is_suspended) {
 225                         mwifiex_dbg(adapter, FATAL,
 226                                     "Card is removed: %d\n", urb->status);
 227                         adapter->surprise_removed = true;
 228                 }
 229                 dev_kfree_skb_any(skb);
 230                 return;
 231         } else {
 232                 /* Do not free skb in case of command ep */
 233                 if (card->rx_cmd_ep != context->ep)
 234                         dev_kfree_skb_any(skb);
 235
 236                 /* fall through setup_for_next */
 237         }
 238
 239 setup_for_next:
 240         if (card->rx_cmd_ep == context->ep)
 241                 size = MWIFIEX_RX_CMD_BUF_SIZE;
 242         else
 243                 size = MWIFIEX_RX_DATA_BUF_SIZE;
 244
 245         if (card->rx_cmd_ep == context->ep) {
 246                 mwifiex_usb_submit_rx_urb(context, size);
 247         } else {
 248                 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING) {
 249                         mwifiex_usb_submit_rx_urb(context, size);
 250                 } else {
 251                         context->skb = NULL;
 252                 }
 253         }
 254
 255         return;
 256 }
 257
 258 static void mwifiex_usb_tx_complete(struct urb *urb)
 259 {
 260         struct urb_context *context = (struct urb_context *)(urb->context);
 261         struct mwifiex_adapter *adapter = context->adapter;
 262         struct usb_card_rec *card = adapter->card;
 263         struct usb_tx_data_port *port;
 264         int i;
 265
 266         mwifiex_dbg(adapter, INFO,
 267                     "%s: status: %d\n", __func__, urb->status);
 268
 269         if (context->ep == card->tx_cmd_ep) {
 270                 mwifiex_dbg(adapter, CMD,
 271                             "%s: CMD\n", __func__);
 272                 atomic_dec(&card->tx_cmd_urb_pending);
 273                 adapter->cmd_sent = false;
 274         } else {
 275                 mwifiex_dbg(adapter, DATA,
 276                             "%s: DATA\n", __func__);
 277                 mwifiex_write_data_complete(adapter, context->skb, 0,
 278                                             urb->status ? -1 : 0);
 279                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 280                         port = &card->port[i];
 281                         if (context->ep == port->tx_data_ep) {
 282                                 atomic_dec(&port->tx_data_urb_pending);
 283                                 port->block_status = false;
 284                                 break;
 285                         }
 286                 }
 287                 adapter->data_sent = false;
 288         }
 289
 290         if (card->mc_resync_flag)
 291                 mwifiex_multi_chan_resync(adapter);
 292
 293         mwifiex_queue_main_work(adapter);
 294
 295         return;
 296 }
 297
 298 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
 299 {
 300         struct mwifiex_adapter *adapter = ctx->adapter;
 301         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 302
 303         if (card->rx_cmd_ep != ctx->ep) {
 304                 ctx->skb = dev_alloc_skb(size);
 305                 if (!ctx->skb) {
 306                         mwifiex_dbg(adapter, ERROR,
 307                                     "%s: dev_alloc_skb failed\n", __func__);
 308                         return -ENOMEM;
 309                 }
 310         }
 311
 312         usb_fill_bulk_urb(ctx->urb, card->udev,
 313                           usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
 314                           size, mwifiex_usb_rx_complete, (void *)ctx);
 315
 316         if (card->rx_cmd_ep == ctx->ep)
 317                 atomic_inc(&card->rx_cmd_urb_pending);
 318         else
 319                 atomic_inc(&card->rx_data_urb_pending);
 320
 321         if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
 322                 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
 323                 dev_kfree_skb_any(ctx->skb);
 324                 ctx->skb = NULL;
 325
 326                 if (card->rx_cmd_ep == ctx->ep)
 327                         atomic_dec(&card->rx_cmd_urb_pending);
 328                 else
 329                         atomic_dec(&card->rx_data_urb_pending);
 330
 331                 return -1;
 332         }
 333
 334         return 0;
 335 }
 336
 337 static void mwifiex_usb_free(struct usb_card_rec *card)
 338 {
 339         struct usb_tx_data_port *port;
 340         int i, j;
 341
 342         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 343                 usb_kill_urb(card->rx_cmd.urb);
 344
 345         usb_free_urb(card->rx_cmd.urb);
 346         card->rx_cmd.urb = NULL;
 347
 348         if (atomic_read(&card->rx_data_urb_pending))
 349                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 350                         if (card->rx_data_list[i].urb)
 351                                 usb_kill_urb(card->rx_data_list[i].urb);
 352
 353         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 354                 usb_free_urb(card->rx_data_list[i].urb);
 355                 card->rx_data_list[i].urb = NULL;
 356         }
 357
 358         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 359                 port = &card->port[i];
 360                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 361                         usb_free_urb(port->tx_data_list[j].urb);
 362                         port->tx_data_list[j].urb = NULL;
 363                 }
 364         }
 365
 366         usb_free_urb(card->tx_cmd.urb);
 367         card->tx_cmd.urb = NULL;
 368
 369         return;
 370 }
 371
 372 /* This function probes an mwifiex device and registers it. It allocates
 373  * the card structure, initiates the device registration and initialization
 374  * procedure by adding a logical interface.
 375  */
 376 static int mwifiex_usb_probe(struct usb_interface *intf,
 377                              const struct usb_device_id *id)
 378 {
 379         struct usb_device *udev = interface_to_usbdev(intf);
 380         struct usb_host_interface *iface_desc = intf->cur_altsetting;
 381         struct usb_endpoint_descriptor *epd;
 382         int ret, i;
 383         struct usb_card_rec *card;
 384         u16 id_vendor, id_product, bcd_device, bcd_usb;
 385
 386         card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 387         if (!card)
 388                 return -ENOMEM;
 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         switch (card->usb_boot_state) {
 478         case USB8XXX_FW_DNLD:
 479                 /* Reject broken descriptors. */
 480                 if (!card->rx_cmd_ep || !card->tx_cmd_ep)
 481                         return -ENODEV;
 482                 if (card->bulk_out_maxpktsize == 0)
 483                         return -ENODEV;
 484                 break;
 485         case USB8XXX_FW_READY:
 486                 /* Assume the driver can handle missing endpoints for now. */
 487                 break;
 488         default:
 489                 WARN_ON(1);
 490                 return -ENODEV;
 491         }
 492
 493         usb_set_intfdata(intf, card);
 494
 495         ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
 496                                MWIFIEX_USB);
 497         if (ret) {
 498                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
 499                 usb_reset_device(udev);
 500                 kfree(card);
 501                 return ret;
 502         }
 503
 504         usb_get_dev(udev);
 505
 506         return 0;
 507 }
 508
 509 /* Kernel needs to suspend all functions separately. Therefore all
 510  * registered functions must have drivers with suspend and resume
 511  * methods. Failing that the kernel simply removes the whole card.
 512  *
 513  * If already not suspended, this function allocates and sends a
 514  * 'host sleep activate' request to the firmware and turns off the traffic.
 515  */
 516 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
 517 {
 518         struct usb_card_rec *card = usb_get_intfdata(intf);
 519         struct mwifiex_adapter *adapter;
 520         struct usb_tx_data_port *port;
 521         int i, j;
 522
 523         if (!card || !card->adapter) {
 524                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 525                 return 0;
 526         }
 527         adapter = card->adapter;
 528
 529         if (unlikely(adapter->is_suspended))
 530                 mwifiex_dbg(adapter, WARN,
 531                             "Device already suspended\n");
 532
 533         mwifiex_enable_hs(adapter);
 534
 535         /* 'is_suspended' flag indicates device is suspended.
 536          * It must be set here before the usb_kill_urb() calls. Reason
 537          * is in the complete handlers, urb->status(= -ENOENT) and
 538          * this flag is used in combination to distinguish between a
 539          * 'suspended' state and a 'disconnect' one.
 540          */
 541         adapter->is_suspended = true;
 542         adapter->hs_enabling = false;
 543
 544         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 545                 usb_kill_urb(card->rx_cmd.urb);
 546
 547         if (atomic_read(&card->rx_data_urb_pending))
 548                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 549                         if (card->rx_data_list[i].urb)
 550                                 usb_kill_urb(card->rx_data_list[i].urb);
 551
 552         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 553                 port = &card->port[i];
 554                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 555                         if (port->tx_data_list[j].urb)
 556                                 usb_kill_urb(port->tx_data_list[j].urb);
 557                 }
 558         }
 559
 560         if (card->tx_cmd.urb)
 561                 usb_kill_urb(card->tx_cmd.urb);
 562
 563         return 0;
 564 }
 565
 566 /* Kernel needs to suspend all functions separately. Therefore all
 567  * registered functions must have drivers with suspend and resume
 568  * methods. Failing that the kernel simply removes the whole card.
 569  *
 570  * If already not resumed, this function turns on the traffic and
 571  * sends a 'host sleep cancel' request to the firmware.
 572  */
 573 static int mwifiex_usb_resume(struct usb_interface *intf)
 574 {
 575         struct usb_card_rec *card = usb_get_intfdata(intf);
 576         struct mwifiex_adapter *adapter;
 577         int i;
 578
 579         if (!card || !card->adapter) {
 580                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 581                 return 0;
 582         }
 583         adapter = card->adapter;
 584
 585         if (unlikely(!adapter->is_suspended)) {
 586                 mwifiex_dbg(adapter, WARN,
 587                             "Device already resumed\n");
 588                 return 0;
 589         }
 590
 591         /* Indicate device resumed. The netdev queue will be resumed only
 592          * after the urbs have been re-submitted
 593          */
 594         adapter->is_suspended = false;
 595
 596         if (!atomic_read(&card->rx_data_urb_pending))
 597                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 598                         mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 599                                                   MWIFIEX_RX_DATA_BUF_SIZE);
 600
 601         if (!atomic_read(&card->rx_cmd_urb_pending)) {
 602                 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 603                 if (card->rx_cmd.skb)
 604                         mwifiex_usb_submit_rx_urb(&card->rx_cmd,
 605                                                   MWIFIEX_RX_CMD_BUF_SIZE);
 606         }
 607
 608         /* Disable Host Sleep */
 609         if (adapter->hs_activated)
 610                 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
 611                                                    MWIFIEX_BSS_ROLE_ANY),
 612                                   MWIFIEX_ASYNC_CMD);
 613
 614         return 0;
 615 }
 616
 617 static void mwifiex_usb_disconnect(struct usb_interface *intf)
 618 {
 619         struct usb_card_rec *card = usb_get_intfdata(intf);
 620         struct mwifiex_adapter *adapter;
 621
 622         if (!card || !card->adapter) {
 623                 pr_err("%s: card or card->adapter is NULL\n", __func__);
 624                 return;
 625         }
 626
 627         adapter = card->adapter;
 628         if (!adapter->priv_num)
 629                 return;
 630
 631         if (user_rmmod && !adapter->mfg_mode) {
 632 #ifdef CONFIG_PM
 633                 if (adapter->is_suspended)
 634                         mwifiex_usb_resume(intf);
 635 #endif
 636
 637                 mwifiex_deauthenticate_all(adapter);
 638
 639                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
 640                                                           MWIFIEX_BSS_ROLE_ANY),
 641                                          MWIFIEX_FUNC_SHUTDOWN);
 642         }
 643
 644         if (adapter->workqueue)
 645                 flush_workqueue(adapter->workqueue);
 646
 647         mwifiex_usb_free(card);
 648
 649         mwifiex_dbg(adapter, FATAL,
 650                     "%s: removing card\n", __func__);
 651         mwifiex_remove_card(adapter, &add_remove_card_sem);
 652
 653         usb_set_intfdata(intf, NULL);
 654         usb_put_dev(interface_to_usbdev(intf));
 655         kfree(card);
 656
 657         return;
 658 }
 659
 660 static struct usb_driver mwifiex_usb_driver = {
 661         .name = "mwifiex_usb",
 662         .probe = mwifiex_usb_probe,
 663         .disconnect = mwifiex_usb_disconnect,
 664         .id_table = mwifiex_usb_table,
 665         .suspend = mwifiex_usb_suspend,
 666         .resume = mwifiex_usb_resume,
 667         .soft_unbind = 1,
 668 };
 669
 670 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
 671 {
 672         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 673         struct usb_tx_data_port *port;
 674         int i, j;
 675
 676         card->tx_cmd.adapter = adapter;
 677         card->tx_cmd.ep = card->tx_cmd_ep;
 678
 679         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 680         if (!card->tx_cmd.urb)
 681                 return -ENOMEM;
 682
 683         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 684                 port = &card->port[i];
 685                 if (!port->tx_data_ep)
 686                         continue;
 687                 port->tx_data_ix = 0;
 688                 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
 689                         port->block_status = false;
 690                 else
 691                         port->block_status = true;
 692                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 693                         port->tx_data_list[j].adapter = adapter;
 694                         port->tx_data_list[j].ep = port->tx_data_ep;
 695                         port->tx_data_list[j].urb =
 696                                         usb_alloc_urb(0, GFP_KERNEL);
 697                         if (!port->tx_data_list[j].urb)
 698                                 return -ENOMEM;
 699                 }
 700         }
 701
 702         return 0;
 703 }
 704
 705 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
 706 {
 707         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 708         int i;
 709
 710         card->rx_cmd.adapter = adapter;
 711         card->rx_cmd.ep = card->rx_cmd_ep;
 712
 713         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
 714         if (!card->rx_cmd.urb)
 715                 return -ENOMEM;
 716
 717         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 718         if (!card->rx_cmd.skb)
 719                 return -ENOMEM;
 720
 721         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
 722                 return -1;
 723
 724         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 725                 card->rx_data_list[i].adapter = adapter;
 726                 card->rx_data_list[i].ep = card->rx_data_ep;
 727
 728                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
 729                 if (!card->rx_data_list[i].urb)
 730                         return -1;
 731                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 732                                               MWIFIEX_RX_DATA_BUF_SIZE))
 733                         return -1;
 734         }
 735
 736         return 0;
 737 }
 738
 739 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 740                                    u32 *len, u8 ep, u32 timeout)
 741 {
 742         struct usb_card_rec *card = adapter->card;
 743         int actual_length, ret;
 744
 745         if (!(*len % card->bulk_out_maxpktsize))
 746                 (*len)++;
 747
 748         /* Send the data block */
 749         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
 750                            *len, &actual_length, timeout);
 751         if (ret) {
 752                 mwifiex_dbg(adapter, ERROR,
 753                             "usb_bulk_msg for tx failed: %d\n", ret);
 754                 return ret;
 755         }
 756
 757         *len = actual_length;
 758
 759         return ret;
 760 }
 761
 762 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 763                                   u32 *len, u8 ep, u32 timeout)
 764 {
 765         struct usb_card_rec *card = adapter->card;
 766         int actual_length, ret;
 767
 768         /* Receive the data response */
 769         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
 770                            *len, &actual_length, timeout);
 771         if (ret) {
 772                 mwifiex_dbg(adapter, ERROR,
 773                             "usb_bulk_msg for rx failed: %d\n", ret);
 774                 return ret;
 775         }
 776
 777         *len = actual_length;
 778
 779         return ret;
 780 }
 781
 782 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
 783 {
 784         struct usb_card_rec *card = adapter->card;
 785         u8 active_port = MWIFIEX_USB_EP_DATA;
 786         struct mwifiex_private *priv = NULL;
 787         int i;
 788
 789         if (adapter->usb_mc_status) {
 790                 for (i = 0; i < adapter->priv_num; i++) {
 791                         priv = adapter->priv[i];
 792                         if (!priv)
 793                                 continue;
 794                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 795                              !priv->bss_started) ||
 796                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 797                              !priv->media_connected))
 798                                 priv->usb_port = MWIFIEX_USB_EP_DATA;
 799                 }
 800                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 801                         card->port[i].block_status = false;
 802         } else {
 803                 for (i = 0; i < adapter->priv_num; i++) {
 804                         priv = adapter->priv[i];
 805                         if (!priv)
 806                                 continue;
 807                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 808                              priv->bss_started) ||
 809                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 810                              priv->media_connected)) {
 811                                 active_port = priv->usb_port;
 812                                 break;
 813                         }
 814                 }
 815                 for (i = 0; i < adapter->priv_num; i++) {
 816                         priv = adapter->priv[i];
 817                         if (priv)
 818                                 priv->usb_port = active_port;
 819                 }
 820                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 821                         if (active_port == card->port[i].tx_data_ep)
 822                                 card->port[i].block_status = false;
 823                         else
 824                                 card->port[i].block_status = true;
 825                 }
 826         }
 827 }
 828
 829 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
 830 {
 831         struct usb_card_rec *card = priv->adapter->card;
 832         int idx;
 833
 834         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 835                 if (priv->usb_port == card->port[idx].tx_data_ep)
 836                         return !card->port[idx].block_status;
 837         }
 838
 839         return false;
 840 }
 841
 842 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
 843 {
 844         struct usb_card_rec *card = adapter->card;
 845         int i;
 846
 847         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 848                 if (!card->port[i].block_status)
 849                         return false;
 850
 851         return true;
 852 }
 853
 854 /* This function write a command/data packet to card. */
 855 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
 856                                     struct sk_buff *skb,
 857                                     struct mwifiex_tx_param *tx_param)
 858 {
 859         struct usb_card_rec *card = adapter->card;
 860         struct urb_context *context = NULL;
 861         struct usb_tx_data_port *port = NULL;
 862         u8 *data = (u8 *)skb->data;
 863         struct urb *tx_urb;
 864         int idx, ret = -EINPROGRESS;
 865
 866         if (adapter->is_suspended) {
 867                 mwifiex_dbg(adapter, ERROR,
 868                             "%s: not allowed while suspended\n", __func__);
 869                 return -1;
 870         }
 871
 872         if (adapter->surprise_removed) {
 873                 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
 874                 return -1;
 875         }
 876
 877         mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
 878
 879         if (ep == card->tx_cmd_ep) {
 880                 context = &card->tx_cmd;
 881         } else {
 882                 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 883                         if (ep == card->port[idx].tx_data_ep) {
 884                                 port = &card->port[idx];
 885                                 if (atomic_read(&port->tx_data_urb_pending)
 886                                     >= MWIFIEX_TX_DATA_URB) {
 887                                         port->block_status = true;
 888                                         adapter->data_sent =
 889                                                 mwifiex_usb_data_sent(adapter);
 890                                         return -EBUSY;
 891                                 }
 892                                 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
 893                                         port->tx_data_ix = 0;
 894                                 context =
 895                                         &port->tx_data_list[port->tx_data_ix++];
 896                                 break;
 897                         }
 898                 }
 899                 if (!port) {
 900                         mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
 901                         return -1;
 902                 }
 903         }
 904
 905         context->adapter = adapter;
 906         context->ep = ep;
 907         context->skb = skb;
 908         tx_urb = context->urb;
 909
 910         usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
 911                           data, skb->len, mwifiex_usb_tx_complete,
 912                           (void *)context);
 913
 914         tx_urb->transfer_flags |= URB_ZERO_PACKET;
 915
 916         if (ep == card->tx_cmd_ep)
 917                 atomic_inc(&card->tx_cmd_urb_pending);
 918         else
 919                 atomic_inc(&port->tx_data_urb_pending);
 920
 921         if (ep != card->tx_cmd_ep &&
 922             atomic_read(&port->tx_data_urb_pending) ==
 923                                         MWIFIEX_TX_DATA_URB) {
 924                 port->block_status = true;
 925                 adapter->data_sent = mwifiex_usb_data_sent(adapter);
 926                 ret = -ENOSR;
 927         }
 928
 929         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
 930                 mwifiex_dbg(adapter, ERROR,
 931                             "%s: usb_submit_urb failed\n", __func__);
 932                 if (ep == card->tx_cmd_ep) {
 933                         atomic_dec(&card->tx_cmd_urb_pending);
 934                 } else {
 935                         atomic_dec(&port->tx_data_urb_pending);
 936                         port->block_status = false;
 937                         adapter->data_sent = false;
 938                         if (port->tx_data_ix)
 939                                 port->tx_data_ix--;
 940                         else
 941                                 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
 942                 }
 943                 ret = -1;
 944         }
 945
 946         return ret;
 947 }
 948
 949 /* This function register usb device and initialize parameter. */
 950 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
 951 {
 952         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 953
 954         card->adapter = adapter;
 955         adapter->dev = &card->udev->dev;
 956
 957         switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
 958         case USB8997_PID_1:
 959         case USB8997_PID_2:
 960                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 961                 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
 962                 adapter->ext_scan = true;
 963                 break;
 964         case USB8766_PID_1:
 965         case USB8766_PID_2:
 966                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 967                 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
 968                 adapter->ext_scan = true;
 969                 break;
 970         case USB8801_PID_1:
 971         case USB8801_PID_2:
 972                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 973                 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
 974                 adapter->ext_scan = false;
 975                 break;
 976         case USB8797_PID_1:
 977         case USB8797_PID_2:
 978         default:
 979                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 980                 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
 981                 break;
 982         }
 983
 984         adapter->usb_mc_status = false;
 985         adapter->usb_mc_setup = false;
 986
 987         return 0;
 988 }
 989
 990 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
 991 {
 992         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 993
 994         card->adapter = NULL;
 995 }
 996
 997 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 998                                     struct mwifiex_fw_image *fw)
 999 {
1000         int ret = 0;
1001         u8 *firmware = fw->fw_buf, *recv_buff;
1002         u32 retries = USB8XXX_FW_MAX_RETRY + 1;
1003         u32 dlen;
1004         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1005         struct fw_data *fwdata;
1006         struct fw_sync_header sync_fw;
1007         u8 check_winner = 1;
1008
1009         if (!firmware) {
1010                 mwifiex_dbg(adapter, ERROR,
1011                             "No firmware image found! Terminating download\n");
1012                 ret = -1;
1013                 goto fw_exit;
1014         }
1015
1016         /* Allocate memory for transmit */
1017         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1018         if (!fwdata) {
1019                 ret = -ENOMEM;
1020                 goto fw_exit;
1021         }
1022
1023         /* Allocate memory for receive */
1024         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1025         if (!recv_buff) {
1026                 ret = -ENOMEM;
1027                 goto cleanup;
1028         }
1029
1030         do {
1031                 /* Send pseudo data to check winner status first */
1032                 if (check_winner) {
1033                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1034                         dlen = 0;
1035                 } else {
1036                         /* copy the header of the fw_data to get the length */
1037                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
1038                                sizeof(struct fw_header));
1039
1040                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1041                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1042                         tlen += sizeof(struct fw_header);
1043
1044                         /* Command 7 doesn't have data length field */
1045                         if (dnld_cmd == FW_CMD_7)
1046                                 dlen = 0;
1047
1048                         memcpy(fwdata->data, &firmware[tlen], dlen);
1049
1050                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
1051                         tlen += dlen;
1052                 }
1053
1054                 /* If the send/receive fails or CRC occurs then retry */
1055                 while (--retries) {
1056                         u8 *buf = (u8 *)fwdata;
1057                         u32 len = FW_DATA_XMIT_SIZE;
1058
1059                         /* send the firmware block */
1060                         ret = mwifiex_write_data_sync(adapter, buf, &len,
1061                                                 MWIFIEX_USB_EP_CMD_EVENT,
1062                                                 MWIFIEX_USB_TIMEOUT);
1063                         if (ret) {
1064                                 mwifiex_dbg(adapter, ERROR,
1065                                             "write_data_sync: failed: %d\n",
1066                                             ret);
1067                                 continue;
1068                         }
1069
1070                         buf = recv_buff;
1071                         len = FW_DNLD_RX_BUF_SIZE;
1072
1073                         /* Receive the firmware block response */
1074                         ret = mwifiex_read_data_sync(adapter, buf, &len,
1075                                                 MWIFIEX_USB_EP_CMD_EVENT,
1076                                                 MWIFIEX_USB_TIMEOUT);
1077                         if (ret) {
1078                                 mwifiex_dbg(adapter, ERROR,
1079                                             "read_data_sync: failed: %d\n",
1080                                             ret);
1081                                 continue;
1082                         }
1083
1084                         memcpy(&sync_fw, recv_buff,
1085                                sizeof(struct fw_sync_header));
1086
1087                         /* check 1st firmware block resp for highest bit set */
1088                         if (check_winner) {
1089                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1090                                         mwifiex_dbg(adapter, WARN,
1091                                                     "USB is not the winner %#x\n",
1092                                                     sync_fw.cmd);
1093
1094                                         /* returning success */
1095                                         ret = 0;
1096                                         goto cleanup;
1097                                 }
1098
1099                                 mwifiex_dbg(adapter, MSG,
1100                                             "start to download FW...\n");
1101
1102                                 check_winner = 0;
1103                                 break;
1104                         }
1105
1106                         /* check the firmware block response for CRC errors */
1107                         if (sync_fw.cmd) {
1108                                 mwifiex_dbg(adapter, ERROR,
1109                                             "FW received block with CRC %#x\n",
1110                                             sync_fw.cmd);
1111                                 ret = -1;
1112                                 continue;
1113                         }
1114
1115                         retries = USB8XXX_FW_MAX_RETRY + 1;
1116                         break;
1117                 }
1118                 fw_seqnum++;
1119         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1120
1121 cleanup:
1122         mwifiex_dbg(adapter, MSG,
1123                     "info: FW download over, size %d bytes\n", tlen);
1124
1125         kfree(recv_buff);
1126         kfree(fwdata);
1127
1128         if (retries)
1129                 ret = 0;
1130 fw_exit:
1131         return ret;
1132 }
1133
1134 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1135                         struct mwifiex_fw_image *fw)
1136 {
1137         int ret;
1138         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1139
1140         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1141                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1142                 if (ret)
1143                         return -1;
1144
1145                 /* Boot state changes after successful firmware download */
1146                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1147                         return -1;
1148         }
1149
1150         ret = mwifiex_usb_rx_init(adapter);
1151         if (!ret)
1152                 ret = mwifiex_usb_tx_init(adapter);
1153
1154         return ret;
1155 }
1156
1157 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1158 {
1159         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1160
1161         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1162         if ((ep == card->rx_cmd_ep) &&
1163             (!atomic_read(&card->rx_cmd_urb_pending)))
1164                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1165                                           MWIFIEX_RX_CMD_BUF_SIZE);
1166
1167         return;
1168 }
1169
1170 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1171                                        struct sk_buff *skb)
1172 {
1173         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1174
1175         return 0;
1176 }
1177
1178 /* This function wakes up the card. */
1179 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1180 {
1181         /* Simulation of HS_AWAKE event */
1182         adapter->pm_wakeup_fw_try = false;
1183         del_timer(&adapter->wakeup_timer);
1184         adapter->pm_wakeup_card_req = false;
1185         adapter->ps_state = PS_STATE_AWAKE;
1186
1187         return 0;
1188 }
1189
1190 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1191 {
1192         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1193         int i;
1194         struct urb_context *ctx;
1195
1196         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1197                 if (card->rx_data_list[i].skb)
1198                         continue;
1199                 ctx = &card->rx_data_list[i];
1200                 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1201         }
1202 }
1203
1204 /* This function is called after the card has woken up. */
1205 static inline int
1206 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1207 {
1208         return 0;
1209 }
1210
1211 static struct mwifiex_if_ops usb_ops = {
1212         .register_dev =         mwifiex_register_dev,
1213         .unregister_dev =       mwifiex_unregister_dev,
1214         .wakeup =               mwifiex_pm_wakeup_card,
1215         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
1216
1217         /* USB specific */
1218         .dnld_fw =              mwifiex_usb_dnld_fw,
1219         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
1220         .event_complete =       mwifiex_usb_cmd_event_complete,
1221         .host_to_card =         mwifiex_usb_host_to_card,
1222         .submit_rem_rx_urbs =   mwifiex_usb_submit_rem_rx_urbs,
1223         .multi_port_resync =    mwifiex_usb_port_resync,
1224         .is_port_ready =        mwifiex_usb_is_port_ready,
1225 };
1226
1227 /* This function initializes the USB driver module.
1228  *
1229  * This initiates the semaphore and registers the device with
1230  * USB bus.
1231  */
1232 static int mwifiex_usb_init_module(void)
1233 {
1234         int ret;
1235
1236         pr_debug("Marvell USB8797 Driver\n");
1237
1238         sema_init(&add_remove_card_sem, 1);
1239
1240         ret = usb_register(&mwifiex_usb_driver);
1241         if (ret)
1242                 pr_err("Driver register failed!\n");
1243         else
1244                 pr_debug("info: Driver registered successfully!\n");
1245
1246         return ret;
1247 }
1248
1249 /* This function cleans up the USB driver.
1250  *
1251  * The following major steps are followed in .disconnect for cleanup:
1252  *      - Resume the device if its suspended
1253  *      - Disconnect the device if connected
1254  *      - Shutdown the firmware
1255  *      - Unregister the device from USB bus.
1256  */
1257 static void mwifiex_usb_cleanup_module(void)
1258 {
1259         if (!down_interruptible(&add_remove_card_sem))
1260                 up(&add_remove_card_sem);
1261
1262         /* set the flag as user is removing this module */
1263         user_rmmod = 1;
1264
1265         usb_deregister(&mwifiex_usb_driver);
1266 }
1267
1268 module_init(mwifiex_usb_init_module);
1269 module_exit(mwifiex_usb_cleanup_module);
1270
1271 MODULE_AUTHOR("Marvell International Ltd.");
1272 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1273 MODULE_VERSION(USB_VERSION);
1274 MODULE_LICENSE("GPL v2");
1275 /*(DEBLOBBED)*/