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 struct mwifiex_if_ops usb_ops;
  26
  27 static const struct usb_device_id mwifiex_usb_table[] = {
  28         /* 8766 */
  29         {USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
  30         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
  31                                        USB_CLASS_VENDOR_SPEC,
  32                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  33         /* 8797 */
  34         {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
  35         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
  36                                        USB_CLASS_VENDOR_SPEC,
  37                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  38         /* 8801 */
  39         {USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
  40         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
  41                                        USB_CLASS_VENDOR_SPEC,
  42                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  43         /* 8997 */
  44         {USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
  45         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
  46                                        USB_CLASS_VENDOR_SPEC,
  47                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
  48         { }     /* Terminating entry */
  49 };
  50
  51 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
  52
  53 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
  54
  55 /* This function handles received packet. Necessary action is taken based on
  56  * cmd/event/data.
  57  */
  58 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
  59                             struct sk_buff *skb, u8 ep)
  60 {
  61         u32 recv_type;
  62         __le32 tmp;
  63         int ret;
  64
  65         if (adapter->hs_activated)
  66                 mwifiex_process_hs_config(adapter);
  67
  68         if (skb->len < INTF_HEADER_LEN) {
  69                 mwifiex_dbg(adapter, ERROR,
  70                             "%s: invalid skb->len\n", __func__);
  71                 return -1;
  72         }
  73
  74         switch (ep) {
  75         case MWIFIEX_USB_EP_CMD_EVENT:
  76                 mwifiex_dbg(adapter, EVENT,
  77                             "%s: EP_CMD_EVENT\n", __func__);
  78                 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
  79                 recv_type = le32_to_cpu(tmp);
  80                 skb_pull(skb, INTF_HEADER_LEN);
  81
  82                 switch (recv_type) {
  83                 case MWIFIEX_USB_TYPE_CMD:
  84                         if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
  85                                 mwifiex_dbg(adapter, ERROR,
  86                                             "CMD: skb->len too large\n");
  87                                 ret = -1;
  88                                 goto exit_restore_skb;
  89                         } else if (!adapter->curr_cmd) {
  90                                 mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
  91                                 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
  92                                         mwifiex_process_sleep_confirm_resp(
  93                                                         adapter, skb->data,
  94                                                         skb->len);
  95                                         ret = 0;
  96                                         goto exit_restore_skb;
  97                                 }
  98                                 ret = -1;
  99                                 goto exit_restore_skb;
 100                         }
 101
 102                         adapter->curr_cmd->resp_skb = skb;
 103                         adapter->cmd_resp_received = true;
 104                         break;
 105                 case MWIFIEX_USB_TYPE_EVENT:
 106                         if (skb->len < sizeof(u32)) {
 107                                 mwifiex_dbg(adapter, ERROR,
 108                                             "EVENT: skb->len too small\n");
 109                                 ret = -1;
 110                                 goto exit_restore_skb;
 111                         }
 112                         skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
 113                         adapter->event_cause = le32_to_cpu(tmp);
 114                         mwifiex_dbg(adapter, EVENT,
 115                                     "event_cause %#x\n", adapter->event_cause);
 116
 117                         if (skb->len > MAX_EVENT_SIZE) {
 118                                 mwifiex_dbg(adapter, ERROR,
 119                                             "EVENT: event body too large\n");
 120                                 ret = -1;
 121                                 goto exit_restore_skb;
 122                         }
 123
 124                         memcpy(adapter->event_body, skb->data +
 125                                MWIFIEX_EVENT_HEADER_LEN, skb->len);
 126
 127                         adapter->event_received = true;
 128                         adapter->event_skb = skb;
 129                         break;
 130                 default:
 131                         mwifiex_dbg(adapter, ERROR,
 132                                     "unknown recv_type %#x\n", recv_type);
 133                         return -1;
 134                 }
 135                 break;
 136         case MWIFIEX_USB_EP_DATA:
 137                 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
 138                 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
 139                         mwifiex_dbg(adapter, ERROR,
 140                                     "DATA: skb->len too large\n");
 141                         return -1;
 142                 }
 143
 144                 skb_queue_tail(&adapter->rx_data_q, skb);
 145                 adapter->data_received = true;
 146                 atomic_inc(&adapter->rx_pending);
 147                 break;
 148         default:
 149                 mwifiex_dbg(adapter, ERROR,
 150                             "%s: unknown endport %#x\n", __func__, ep);
 151                 return -1;
 152         }
 153
 154         return -EINPROGRESS;
 155
 156 exit_restore_skb:
 157         /* The buffer will be reused for further cmds/events */
 158         skb_push(skb, INTF_HEADER_LEN);
 159
 160         return ret;
 161 }
 162
 163 static void mwifiex_usb_rx_complete(struct urb *urb)
 164 {
 165         struct urb_context *context = (struct urb_context *)urb->context;
 166         struct mwifiex_adapter *adapter = context->adapter;
 167         struct sk_buff *skb = context->skb;
 168         struct usb_card_rec *card;
 169         int recv_length = urb->actual_length;
 170         int size, status;
 171
 172         if (!adapter || !adapter->card) {
 173                 pr_err("mwifiex adapter or card structure is not valid\n");
 174                 return;
 175         }
 176
 177         card = (struct usb_card_rec *)adapter->card;
 178         if (card->rx_cmd_ep == context->ep)
 179                 atomic_dec(&card->rx_cmd_urb_pending);
 180         else
 181                 atomic_dec(&card->rx_data_urb_pending);
 182
 183         if (recv_length) {
 184                 if (urb->status || (adapter->surprise_removed)) {
 185                         mwifiex_dbg(adapter, ERROR,
 186                                     "URB status is failed: %d\n", urb->status);
 187                         /* Do not free skb in case of command ep */
 188                         if (card->rx_cmd_ep != context->ep)
 189                                 dev_kfree_skb_any(skb);
 190                         goto setup_for_next;
 191                 }
 192                 if (skb->len > recv_length)
 193                         skb_trim(skb, recv_length);
 194                 else
 195                         skb_put(skb, recv_length - skb->len);
 196
 197                 status = mwifiex_usb_recv(adapter, skb, context->ep);
 198
 199                 mwifiex_dbg(adapter, INFO,
 200                             "info: recv_length=%d, status=%d\n",
 201                             recv_length, status);
 202                 if (status == -EINPROGRESS) {
 203                         mwifiex_queue_main_work(adapter);
 204
 205                         /* urb for data_ep is re-submitted now;
 206                          * urb for cmd_ep will be re-submitted in callback
 207                          * mwifiex_usb_recv_complete
 208                          */
 209                         if (card->rx_cmd_ep == context->ep)
 210                                 return;
 211                 } else {
 212                         if (status == -1)
 213                                 mwifiex_dbg(adapter, ERROR,
 214                                             "received data processing failed!\n");
 215
 216                         /* Do not free skb in case of command ep */
 217                         if (card->rx_cmd_ep != context->ep)
 218                                 dev_kfree_skb_any(skb);
 219                 }
 220         } else if (urb->status) {
 221                 if (!adapter->is_suspended) {
 222                         mwifiex_dbg(adapter, FATAL,
 223                                     "Card is removed: %d\n", urb->status);
 224                         adapter->surprise_removed = true;
 225                 }
 226                 dev_kfree_skb_any(skb);
 227                 return;
 228         } else {
 229                 /* Do not free skb in case of command ep */
 230                 if (card->rx_cmd_ep != context->ep)
 231                         dev_kfree_skb_any(skb);
 232
 233                 /* fall through setup_for_next */
 234         }
 235
 236 setup_for_next:
 237         if (card->rx_cmd_ep == context->ep)
 238                 size = MWIFIEX_RX_CMD_BUF_SIZE;
 239         else
 240                 size = MWIFIEX_RX_DATA_BUF_SIZE;
 241
 242         if (card->rx_cmd_ep == context->ep) {
 243                 mwifiex_usb_submit_rx_urb(context, size);
 244         } else {
 245                 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING) {
 246                         mwifiex_usb_submit_rx_urb(context, size);
 247                 } else {
 248                         context->skb = NULL;
 249                 }
 250         }
 251
 252         return;
 253 }
 254
 255 static void mwifiex_usb_tx_complete(struct urb *urb)
 256 {
 257         struct urb_context *context = (struct urb_context *)(urb->context);
 258         struct mwifiex_adapter *adapter = context->adapter;
 259         struct usb_card_rec *card = adapter->card;
 260         struct usb_tx_data_port *port;
 261         int i;
 262
 263         mwifiex_dbg(adapter, INFO,
 264                     "%s: status: %d\n", __func__, urb->status);
 265
 266         if (context->ep == card->tx_cmd_ep) {
 267                 mwifiex_dbg(adapter, CMD,
 268                             "%s: CMD\n", __func__);
 269                 atomic_dec(&card->tx_cmd_urb_pending);
 270                 adapter->cmd_sent = false;
 271         } else {
 272                 mwifiex_dbg(adapter, DATA,
 273                             "%s: DATA\n", __func__);
 274                 mwifiex_write_data_complete(adapter, context->skb, 0,
 275                                             urb->status ? -1 : 0);
 276                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 277                         port = &card->port[i];
 278                         if (context->ep == port->tx_data_ep) {
 279                                 atomic_dec(&port->tx_data_urb_pending);
 280                                 port->block_status = false;
 281                                 break;
 282                         }
 283                 }
 284                 adapter->data_sent = false;
 285         }
 286
 287         if (card->mc_resync_flag)
 288                 mwifiex_multi_chan_resync(adapter);
 289
 290         mwifiex_queue_main_work(adapter);
 291
 292         return;
 293 }
 294
 295 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
 296 {
 297         struct mwifiex_adapter *adapter = ctx->adapter;
 298         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
 299
 300         if (card->rx_cmd_ep != ctx->ep) {
 301                 ctx->skb = dev_alloc_skb(size);
 302                 if (!ctx->skb) {
 303                         mwifiex_dbg(adapter, ERROR,
 304                                     "%s: dev_alloc_skb failed\n", __func__);
 305                         return -ENOMEM;
 306                 }
 307         }
 308
 309         if (card->rx_cmd_ep == ctx->ep &&
 310             card->rx_cmd_ep_type == USB_ENDPOINT_XFER_INT)
 311                 usb_fill_int_urb(ctx->urb, card->udev,
 312                                  usb_rcvintpipe(card->udev, ctx->ep),
 313                                  ctx->skb->data, size, mwifiex_usb_rx_complete,
 314                                  (void *)ctx, card->rx_cmd_interval);
 315         else
 316                 usb_fill_bulk_urb(ctx->urb, card->udev,
 317                                   usb_rcvbulkpipe(card->udev, ctx->ep),
 318                                   ctx->skb->data, size, mwifiex_usb_rx_complete,
 319                                   (void *)ctx);
 320
 321         if (card->rx_cmd_ep == ctx->ep)
 322                 atomic_inc(&card->rx_cmd_urb_pending);
 323         else
 324                 atomic_inc(&card->rx_data_urb_pending);
 325
 326         if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
 327                 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
 328                 dev_kfree_skb_any(ctx->skb);
 329                 ctx->skb = NULL;
 330
 331                 if (card->rx_cmd_ep == ctx->ep)
 332                         atomic_dec(&card->rx_cmd_urb_pending);
 333                 else
 334                         atomic_dec(&card->rx_data_urb_pending);
 335
 336                 return -1;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static void mwifiex_usb_free(struct usb_card_rec *card)
 343 {
 344         struct usb_tx_data_port *port;
 345         int i, j;
 346
 347         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 348                 usb_kill_urb(card->rx_cmd.urb);
 349
 350         usb_free_urb(card->rx_cmd.urb);
 351         card->rx_cmd.urb = NULL;
 352
 353         if (atomic_read(&card->rx_data_urb_pending))
 354                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 355                         if (card->rx_data_list[i].urb)
 356                                 usb_kill_urb(card->rx_data_list[i].urb);
 357
 358         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
 359                 usb_free_urb(card->rx_data_list[i].urb);
 360                 card->rx_data_list[i].urb = NULL;
 361         }
 362
 363         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 364                 port = &card->port[i];
 365                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 366                         usb_kill_urb(port->tx_data_list[j].urb);
 367                         usb_free_urb(port->tx_data_list[j].urb);
 368                         port->tx_data_list[j].urb = NULL;
 369                 }
 370         }
 371
 372         usb_free_urb(card->tx_cmd.urb);
 373         card->tx_cmd.urb = NULL;
 374
 375         return;
 376 }
 377
 378 /* This function probes an mwifiex device and registers it. It allocates
 379  * the card structure, initiates the device registration and initialization
 380  * procedure by adding a logical interface.
 381  */
 382 static int mwifiex_usb_probe(struct usb_interface *intf,
 383                              const struct usb_device_id *id)
 384 {
 385         struct usb_device *udev = interface_to_usbdev(intf);
 386         struct usb_host_interface *iface_desc = intf->cur_altsetting;
 387         struct usb_endpoint_descriptor *epd;
 388         int ret, i;
 389         struct usb_card_rec *card;
 390         u16 id_vendor, id_product, bcd_device;
 391
 392         card = devm_kzalloc(&intf->dev, sizeof(*card), GFP_KERNEL);
 393         if (!card)
 394                 return -ENOMEM;
 395
 396         init_completion(&card->fw_done);
 397
 398         id_vendor = le16_to_cpu(udev->descriptor.idVendor);
 399         id_product = le16_to_cpu(udev->descriptor.idProduct);
 400         bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
 401         pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
 402                  id_vendor, id_product, bcd_device);
 403
 404         /* PID_1 is used for firmware downloading only */
 405         switch (id_product) {
 406         case USB8766_PID_1:
 407         case USB8797_PID_1:
 408         case USB8801_PID_1:
 409         case USB8997_PID_1:
 410                 card->usb_boot_state = USB8XXX_FW_DNLD;
 411                 break;
 412         case USB8766_PID_2:
 413         case USB8797_PID_2:
 414         case USB8801_PID_2:
 415         case USB8997_PID_2:
 416                 card->usb_boot_state = USB8XXX_FW_READY;
 417                 break;
 418         default:
 419                 pr_warn("unknown id_product %#x\n", id_product);
 420                 card->usb_boot_state = USB8XXX_FW_DNLD;
 421                 break;
 422         }
 423
 424         card->udev = udev;
 425         card->intf = intf;
 426
 427         pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
 428                  le16_to_cpu(udev->descriptor.bcdUSB),
 429                  udev->descriptor.bDeviceClass,
 430                  udev->descriptor.bDeviceSubClass,
 431                  udev->descriptor.bDeviceProtocol);
 432
 433         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 434                 epd = &iface_desc->endpoint[i].desc;
 435                 if (usb_endpoint_dir_in(epd) &&
 436                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 437                     (usb_endpoint_xfer_bulk(epd) ||
 438                      usb_endpoint_xfer_int(epd))) {
 439                         card->rx_cmd_ep_type = usb_endpoint_type(epd);
 440                         card->rx_cmd_interval = epd->bInterval;
 441                         pr_debug("info: Rx CMD/EVT:: max pkt size: %d, addr: %d, ep_type: %d\n",
 442                                  le16_to_cpu(epd->wMaxPacketSize),
 443                                  epd->bEndpointAddress, card->rx_cmd_ep_type);
 444                         card->rx_cmd_ep = usb_endpoint_num(epd);
 445                         atomic_set(&card->rx_cmd_urb_pending, 0);
 446                 }
 447                 if (usb_endpoint_dir_in(epd) &&
 448                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 449                     usb_endpoint_xfer_bulk(epd)) {
 450                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
 451                                  le16_to_cpu(epd->wMaxPacketSize),
 452                                  epd->bEndpointAddress);
 453                         card->rx_data_ep = usb_endpoint_num(epd);
 454                         atomic_set(&card->rx_data_urb_pending, 0);
 455                 }
 456                 if (usb_endpoint_dir_out(epd) &&
 457                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
 458                     usb_endpoint_xfer_bulk(epd)) {
 459                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 460                                  le16_to_cpu(epd->wMaxPacketSize),
 461                                  epd->bEndpointAddress);
 462                         card->port[0].tx_data_ep = usb_endpoint_num(epd);
 463                         atomic_set(&card->port[0].tx_data_urb_pending, 0);
 464                 }
 465                 if (usb_endpoint_dir_out(epd) &&
 466                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
 467                     usb_endpoint_xfer_bulk(epd)) {
 468                         pr_debug("info: bulk OUT chan2:\t"
 469                                  "max pkt size: %d, addr: %d\n",
 470                                  le16_to_cpu(epd->wMaxPacketSize),
 471                                  epd->bEndpointAddress);
 472                         card->port[1].tx_data_ep = usb_endpoint_num(epd);
 473                         atomic_set(&card->port[1].tx_data_urb_pending, 0);
 474                 }
 475                 if (usb_endpoint_dir_out(epd) &&
 476                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
 477                     (usb_endpoint_xfer_bulk(epd) ||
 478                      usb_endpoint_xfer_int(epd))) {
 479                         card->tx_cmd_ep_type = usb_endpoint_type(epd);
 480                         card->tx_cmd_interval = epd->bInterval;
 481                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
 482                                  le16_to_cpu(epd->wMaxPacketSize),
 483                                  epd->bEndpointAddress);
 484                         pr_debug("info: Tx CMD:: max pkt size: %d, addr: %d, ep_type: %d\n",
 485                                  le16_to_cpu(epd->wMaxPacketSize),
 486                                  epd->bEndpointAddress, card->tx_cmd_ep_type);
 487                         card->tx_cmd_ep = usb_endpoint_num(epd);
 488                         atomic_set(&card->tx_cmd_urb_pending, 0);
 489                         card->bulk_out_maxpktsize =
 490                                         le16_to_cpu(epd->wMaxPacketSize);
 491                 }
 492         }
 493
 494         usb_set_intfdata(intf, card);
 495
 496         ret = mwifiex_add_card(card, &card->fw_done, &usb_ops,
 497                                MWIFIEX_USB, &card->udev->dev);
 498         if (ret) {
 499                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
 500                 usb_reset_device(udev);
 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         /* Might still be loading firmware */
 524         wait_for_completion(&card->fw_done);
 525
 526         adapter = card->adapter;
 527         if (!adapter) {
 528                 dev_err(&intf->dev, "card is not valid\n");
 529                 return 0;
 530         }
 531
 532         if (unlikely(adapter->is_suspended))
 533                 mwifiex_dbg(adapter, WARN,
 534                             "Device already suspended\n");
 535
 536         /* Enable the Host Sleep */
 537         if (!mwifiex_enable_hs(adapter)) {
 538                 mwifiex_dbg(adapter, ERROR,
 539                             "cmd: failed to suspend\n");
 540                 adapter->hs_enabling = false;
 541                 return -EFAULT;
 542         }
 543
 544
 545         /* 'is_suspended' flag indicates device is suspended.
 546          * It must be set here before the usb_kill_urb() calls. Reason
 547          * is in the complete handlers, urb->status(= -ENOENT) and
 548          * this flag is used in combination to distinguish between a
 549          * 'suspended' state and a 'disconnect' one.
 550          */
 551         adapter->is_suspended = true;
 552         adapter->hs_enabling = false;
 553
 554         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
 555                 usb_kill_urb(card->rx_cmd.urb);
 556
 557         if (atomic_read(&card->rx_data_urb_pending))
 558                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 559                         if (card->rx_data_list[i].urb)
 560                                 usb_kill_urb(card->rx_data_list[i].urb);
 561
 562         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 563                 port = &card->port[i];
 564                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
 565                         if (port->tx_data_list[j].urb)
 566                                 usb_kill_urb(port->tx_data_list[j].urb);
 567                 }
 568         }
 569
 570         if (card->tx_cmd.urb)
 571                 usb_kill_urb(card->tx_cmd.urb);
 572
 573         return 0;
 574 }
 575
 576 /* Kernel needs to suspend all functions separately. Therefore all
 577  * registered functions must have drivers with suspend and resume
 578  * methods. Failing that the kernel simply removes the whole card.
 579  *
 580  * If already not resumed, this function turns on the traffic and
 581  * sends a 'host sleep cancel' request to the firmware.
 582  */
 583 static int mwifiex_usb_resume(struct usb_interface *intf)
 584 {
 585         struct usb_card_rec *card = usb_get_intfdata(intf);
 586         struct mwifiex_adapter *adapter;
 587         int i;
 588
 589         if (!card->adapter) {
 590                 dev_err(&intf->dev, "%s: card->adapter is NULL\n",
 591                         __func__);
 592                 return 0;
 593         }
 594         adapter = card->adapter;
 595
 596         if (unlikely(!adapter->is_suspended)) {
 597                 mwifiex_dbg(adapter, WARN,
 598                             "Device already resumed\n");
 599                 return 0;
 600         }
 601
 602         /* Indicate device resumed. The netdev queue will be resumed only
 603          * after the urbs have been re-submitted
 604          */
 605         adapter->is_suspended = false;
 606
 607         if (!atomic_read(&card->rx_data_urb_pending))
 608                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
 609                         mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
 610                                                   MWIFIEX_RX_DATA_BUF_SIZE);
 611
 612         if (!atomic_read(&card->rx_cmd_urb_pending)) {
 613                 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
 614                 if (card->rx_cmd.skb)
 615                         mwifiex_usb_submit_rx_urb(&card->rx_cmd,
 616                                                   MWIFIEX_RX_CMD_BUF_SIZE);
 617         }
 618
 619         /* Disable Host Sleep */
 620         if (adapter->hs_activated)
 621                 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
 622                                                    MWIFIEX_BSS_ROLE_ANY),
 623                                   MWIFIEX_ASYNC_CMD);
 624
 625         return 0;
 626 }
 627
 628 static void mwifiex_usb_disconnect(struct usb_interface *intf)
 629 {
 630         struct usb_card_rec *card = usb_get_intfdata(intf);
 631         struct mwifiex_adapter *adapter;
 632
 633         wait_for_completion(&card->fw_done);
 634
 635         adapter = card->adapter;
 636         if (!adapter || !adapter->priv_num)
 637                 return;
 638
 639         if (card->udev->state != USB_STATE_NOTATTACHED && !adapter->mfg_mode) {
 640                 mwifiex_deauthenticate_all(adapter);
 641
 642                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
 643                                                           MWIFIEX_BSS_ROLE_ANY),
 644                                          MWIFIEX_FUNC_SHUTDOWN);
 645         }
 646
 647         mwifiex_dbg(adapter, FATAL,
 648                     "%s: removing card\n", __func__);
 649         mwifiex_remove_card(adapter);
 650
 651         usb_put_dev(interface_to_usbdev(intf));
 652 }
 653
 654 static void mwifiex_usb_coredump(struct device *dev)
 655 {
 656         struct usb_interface *intf = to_usb_interface(dev);
 657         struct usb_card_rec *card = usb_get_intfdata(intf);
 658
 659         mwifiex_fw_dump_event(mwifiex_get_priv(card->adapter,
 660                                                MWIFIEX_BSS_ROLE_ANY));
 661 }
 662
 663 static struct usb_driver mwifiex_usb_driver = {
 664         .name = "mwifiex_usb",
 665         .probe = mwifiex_usb_probe,
 666         .disconnect = mwifiex_usb_disconnect,
 667         .id_table = mwifiex_usb_table,
 668         .suspend = mwifiex_usb_suspend,
 669         .resume = mwifiex_usb_resume,
 670         .soft_unbind = 1,
 671         .drvwrap.driver = {
 672                 .coredump = mwifiex_usb_coredump,
 673         },
 674 };
 675
 676 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 677                                    u32 *len, u8 ep, u32 timeout)
 678 {
 679         struct usb_card_rec *card = adapter->card;
 680         int actual_length, ret;
 681
 682         if (!(*len % card->bulk_out_maxpktsize))
 683                 (*len)++;
 684
 685         /* Send the data block */
 686         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
 687                            *len, &actual_length, timeout);
 688         if (ret) {
 689                 mwifiex_dbg(adapter, ERROR,
 690                             "usb_bulk_msg for tx failed: %d\n", ret);
 691                 return ret;
 692         }
 693
 694         *len = actual_length;
 695
 696         return ret;
 697 }
 698
 699 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
 700                                   u32 *len, u8 ep, u32 timeout)
 701 {
 702         struct usb_card_rec *card = adapter->card;
 703         int actual_length, ret;
 704
 705         /* Receive the data response */
 706         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
 707                            *len, &actual_length, timeout);
 708         if (ret) {
 709                 mwifiex_dbg(adapter, ERROR,
 710                             "usb_bulk_msg for rx failed: %d\n", ret);
 711                 return ret;
 712         }
 713
 714         *len = actual_length;
 715
 716         return ret;
 717 }
 718
 719 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
 720 {
 721         struct usb_card_rec *card = adapter->card;
 722         u8 active_port = MWIFIEX_USB_EP_DATA;
 723         struct mwifiex_private *priv = NULL;
 724         int i;
 725
 726         if (adapter->usb_mc_status) {
 727                 for (i = 0; i < adapter->priv_num; i++) {
 728                         priv = adapter->priv[i];
 729                         if (!priv)
 730                                 continue;
 731                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 732                              !priv->bss_started) ||
 733                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 734                              !priv->media_connected))
 735                                 priv->usb_port = MWIFIEX_USB_EP_DATA;
 736                 }
 737                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 738                         card->port[i].block_status = false;
 739         } else {
 740                 for (i = 0; i < adapter->priv_num; i++) {
 741                         priv = adapter->priv[i];
 742                         if (!priv)
 743                                 continue;
 744                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
 745                              priv->bss_started) ||
 746                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
 747                              priv->media_connected)) {
 748                                 active_port = priv->usb_port;
 749                                 break;
 750                         }
 751                 }
 752                 for (i = 0; i < adapter->priv_num; i++) {
 753                         priv = adapter->priv[i];
 754                         if (priv)
 755                                 priv->usb_port = active_port;
 756                 }
 757                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
 758                         if (active_port == card->port[i].tx_data_ep)
 759                                 card->port[i].block_status = false;
 760                         else
 761                                 card->port[i].block_status = true;
 762                 }
 763         }
 764 }
 765
 766 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
 767 {
 768         struct usb_card_rec *card = priv->adapter->card;
 769         int idx;
 770
 771         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
 772                 if (priv->usb_port == card->port[idx].tx_data_ep)
 773                         return !card->port[idx].block_status;
 774         }
 775
 776         return false;
 777 }
 778
 779 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
 780 {
 781         struct usb_card_rec *card = adapter->card;
 782         int i;
 783
 784         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
 785                 if (!card->port[i].block_status)
 786                         return false;
 787
 788         return true;
 789 }
 790
 791 static int mwifiex_usb_construct_send_urb(struct mwifiex_adapter *adapter,
 792                                           struct usb_tx_data_port *port, u8 ep,
 793                                           struct urb_context *context,
 794                                           struct sk_buff *skb_send)
 795 {
 796         struct usb_card_rec *card = adapter->card;
 797         int ret = -EINPROGRESS;
 798         struct urb *tx_urb;
 799
 800         context->adapter = adapter;
 801         context->ep = ep;
 802         context->skb = skb_send;
 803         tx_urb = context->urb;
 804
 805         if (ep == card->tx_cmd_ep &&
 806             card->tx_cmd_ep_type == USB_ENDPOINT_XFER_INT)
 807                 usb_fill_int_urb(tx_urb, card->udev,
 808                                  usb_sndintpipe(card->udev, ep), skb_send->data,
 809                                  skb_send->len, mwifiex_usb_tx_complete,
 810                                  (void *)context, card->tx_cmd_interval);
 811         else
 812                 usb_fill_bulk_urb(tx_urb, card->udev,
 813                                   usb_sndbulkpipe(card->udev, ep),
 814                                   skb_send->data, skb_send->len,
 815                                   mwifiex_usb_tx_complete, (void *)context);
 816
 817         tx_urb->transfer_flags |= URB_ZERO_PACKET;
 818
 819         if (ep == card->tx_cmd_ep)
 820                 atomic_inc(&card->tx_cmd_urb_pending);
 821         else
 822                 atomic_inc(&port->tx_data_urb_pending);
 823
 824         if (ep != card->tx_cmd_ep &&
 825             atomic_read(&port->tx_data_urb_pending) ==
 826                                         MWIFIEX_TX_DATA_URB) {
 827                 port->block_status = true;
 828                 adapter->data_sent = mwifiex_usb_data_sent(adapter);
 829                 ret = -ENOSR;
 830         }
 831
 832         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
 833                 mwifiex_dbg(adapter, ERROR,
 834                             "%s: usb_submit_urb failed\n", __func__);
 835                 if (ep == card->tx_cmd_ep) {
 836                         atomic_dec(&card->tx_cmd_urb_pending);
 837                 } else {
 838                         atomic_dec(&port->tx_data_urb_pending);
 839                         port->block_status = false;
 840                         adapter->data_sent = false;
 841                         if (port->tx_data_ix)
 842                                 port->tx_data_ix--;
 843                         else
 844                                 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
 845                 }
 846                 ret = -1;
 847         }
 848
 849         return ret;
 850 }
 851
 852 static int mwifiex_usb_prepare_tx_aggr_skb(struct mwifiex_adapter *adapter,
 853                                            struct usb_tx_data_port *port,
 854                                            struct sk_buff **skb_send)
 855 {
 856         struct sk_buff *skb_aggr, *skb_tmp;
 857         u8 *payload, pad;
 858         u16 align = adapter->bus_aggr.tx_aggr_align;
 859         struct mwifiex_txinfo *tx_info = NULL;
 860         bool is_txinfo_set = false;
 861
 862         /* Packets in aggr_list will be send in either skb_aggr or
 863          * write complete, delete the tx_aggr timer
 864          */
 865         if (port->tx_aggr.timer_cnxt.is_hold_timer_set) {
 866                 del_timer(&port->tx_aggr.timer_cnxt.hold_timer);
 867                 port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
 868                 port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
 869         }
 870
 871         skb_aggr = mwifiex_alloc_dma_align_buf(port->tx_aggr.aggr_len,
 872                                                GFP_ATOMIC);
 873         if (!skb_aggr) {
 874                 mwifiex_dbg(adapter, ERROR,
 875                             "%s: alloc skb_aggr failed\n", __func__);
 876
 877                 while ((skb_tmp = skb_dequeue(&port->tx_aggr.aggr_list)))
 878                         mwifiex_write_data_complete(adapter, skb_tmp, 0, -1);
 879
 880                 port->tx_aggr.aggr_num = 0;
 881                 port->tx_aggr.aggr_len = 0;
 882                 return -EBUSY;
 883         }
 884
 885         tx_info = MWIFIEX_SKB_TXCB(skb_aggr);
 886         memset(tx_info, 0, sizeof(*tx_info));
 887
 888         while ((skb_tmp = skb_dequeue(&port->tx_aggr.aggr_list))) {
 889                 /* padding for aligning next packet header*/
 890                 pad = (align - (skb_tmp->len & (align - 1))) % align;
 891                 payload = skb_put(skb_aggr, skb_tmp->len + pad);
 892                 memcpy(payload, skb_tmp->data, skb_tmp->len);
 893                 if (skb_queue_empty(&port->tx_aggr.aggr_list)) {
 894                         /* do not padding for last packet*/
 895                         *(u16 *)payload = cpu_to_le16(skb_tmp->len);
 896                         *(u16 *)&payload[2] =
 897                                 cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2 | 0x80);
 898                         skb_trim(skb_aggr, skb_aggr->len - pad);
 899                 } else {
 900                         /* add aggregation interface header */
 901                         *(u16 *)payload = cpu_to_le16(skb_tmp->len + pad);
 902                         *(u16 *)&payload[2] =
 903                                 cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2);
 904                 }
 905
 906                 if (!is_txinfo_set) {
 907                         tx_info->bss_num = MWIFIEX_SKB_TXCB(skb_tmp)->bss_num;
 908                         tx_info->bss_type = MWIFIEX_SKB_TXCB(skb_tmp)->bss_type;
 909                         is_txinfo_set = true;
 910                 }
 911
 912                 port->tx_aggr.aggr_num--;
 913                 port->tx_aggr.aggr_len -= (skb_tmp->len + pad);
 914                 mwifiex_write_data_complete(adapter, skb_tmp, 0, 0);
 915         }
 916
 917         tx_info->pkt_len = skb_aggr->len -
 918                         (sizeof(struct txpd) + adapter->intf_hdr_len);
 919         tx_info->flags |= MWIFIEX_BUF_FLAG_AGGR_PKT;
 920
 921         port->tx_aggr.aggr_num = 0;
 922         port->tx_aggr.aggr_len = 0;
 923         *skb_send = skb_aggr;
 924
 925         return 0;
 926 }
 927
 928 /* This function prepare data packet to be send under usb tx aggregation
 929  * protocol, check current usb aggregation status, link packet to aggrgation
 930  * list if possible, work flow as below:
 931  * (1) if only 1 packet available, add usb tx aggregation header and send.
 932  * (2) if packet is able to aggregated, link it to current aggregation list.
 933  * (3) if packet is not able to aggregated, aggregate and send exist packets
 934  *     in aggrgation list. Then, link packet in the list if there is more
 935  *     packet in transmit queue, otherwise try to transmit single packet.
 936  */
 937 static int mwifiex_usb_aggr_tx_data(struct mwifiex_adapter *adapter, u8 ep,
 938                                     struct sk_buff *skb,
 939                                     struct mwifiex_tx_param *tx_param,
 940                                     struct usb_tx_data_port *port)
 941 {
 942         u8 *payload, pad;
 943         u16 align = adapter->bus_aggr.tx_aggr_align;
 944         struct sk_buff *skb_send = NULL;
 945         struct urb_context *context = NULL;
 946         struct txpd *local_tx_pd =
 947                 (struct txpd *)((u8 *)skb->data + adapter->intf_hdr_len);
 948         u8 f_send_aggr_buf = 0;
 949         u8 f_send_cur_buf = 0;
 950         u8 f_precopy_cur_buf = 0;
 951         u8 f_postcopy_cur_buf = 0;
 952         u32 timeout;
 953         int ret;
 954
 955         /* padding to ensure each packet alginment */
 956         pad = (align - (skb->len & (align - 1))) % align;
 957
 958         if (tx_param && tx_param->next_pkt_len) {
 959                 /* next packet available in tx queue*/
 960                 if (port->tx_aggr.aggr_len + skb->len + pad >
 961                     adapter->bus_aggr.tx_aggr_max_size) {
 962                         f_send_aggr_buf = 1;
 963                         f_postcopy_cur_buf = 1;
 964                 } else {
 965                         /* current packet could be aggregated*/
 966                         f_precopy_cur_buf = 1;
 967
 968                         if (port->tx_aggr.aggr_len + skb->len + pad +
 969                             tx_param->next_pkt_len >
 970                             adapter->bus_aggr.tx_aggr_max_size ||
 971                             port->tx_aggr.aggr_num + 2 >
 972                             adapter->bus_aggr.tx_aggr_max_num) {
 973                             /* next packet could not be aggregated
 974                              * send current aggregation buffer
 975                              */
 976                                 f_send_aggr_buf = 1;
 977                         }
 978                 }
 979         } else {
 980                 /* last packet in tx queue */
 981                 if (port->tx_aggr.aggr_num > 0) {
 982                         /* pending packets in aggregation buffer*/
 983                         if (port->tx_aggr.aggr_len + skb->len + pad >
 984                             adapter->bus_aggr.tx_aggr_max_size) {
 985                                 /* current packet not be able to aggregated,
 986                                  * send aggr buffer first, then send packet.
 987                                  */
 988                                 f_send_cur_buf = 1;
 989                         } else {
 990                                 /* last packet, Aggregation and send */
 991                                 f_precopy_cur_buf = 1;
 992                         }
 993
 994                         f_send_aggr_buf = 1;
 995                 } else {
 996                         /* no pending packets in aggregation buffer,
 997                          * send current packet immediately
 998                          */
 999                          f_send_cur_buf = 1;
1000                 }
1001         }
1002
1003         if (local_tx_pd->flags & MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET) {
1004                 /* Send NULL packet immediately*/
1005                 if (f_precopy_cur_buf) {
1006                         if (skb_queue_empty(&port->tx_aggr.aggr_list)) {
1007                                 f_precopy_cur_buf = 0;
1008                                 f_send_aggr_buf = 0;
1009                                 f_send_cur_buf = 1;
1010                         } else {
1011                                 f_send_aggr_buf = 1;
1012                         }
1013                 } else if (f_postcopy_cur_buf) {
1014                         f_send_cur_buf = 1;
1015                         f_postcopy_cur_buf = 0;
1016                 }
1017         }
1018
1019         if (f_precopy_cur_buf) {
1020                 skb_queue_tail(&port->tx_aggr.aggr_list, skb);
1021                 port->tx_aggr.aggr_len += (skb->len + pad);
1022                 port->tx_aggr.aggr_num++;
1023                 if (f_send_aggr_buf)
1024                         goto send_aggr_buf;
1025
1026                 /* packet will not been send immediately,
1027                  * set a timer to make sure it will be sent under
1028                  * strict time limit. Dynamically fit the timeout
1029                  * value, according to packets number in aggr_list
1030                  */
1031                 if (!port->tx_aggr.timer_cnxt.is_hold_timer_set) {
1032                         port->tx_aggr.timer_cnxt.hold_tmo_msecs =
1033                                         MWIFIEX_USB_TX_AGGR_TMO_MIN;
1034                         timeout =
1035                                 port->tx_aggr.timer_cnxt.hold_tmo_msecs;
1036                         mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
1037                                   jiffies + msecs_to_jiffies(timeout));
1038                         port->tx_aggr.timer_cnxt.is_hold_timer_set = true;
1039                 } else {
1040                         if (port->tx_aggr.timer_cnxt.hold_tmo_msecs <
1041                             MWIFIEX_USB_TX_AGGR_TMO_MAX) {
1042                                 /* Dyanmic fit timeout */
1043                                 timeout =
1044                                 ++port->tx_aggr.timer_cnxt.hold_tmo_msecs;
1045                                 mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
1046                                           jiffies + msecs_to_jiffies(timeout));
1047                         }
1048                 }
1049         }
1050
1051 send_aggr_buf:
1052         if (f_send_aggr_buf) {
1053                 ret = mwifiex_usb_prepare_tx_aggr_skb(adapter, port, &skb_send);
1054                 if (!ret) {
1055                         context = &port->tx_data_list[port->tx_data_ix++];
1056                         ret = mwifiex_usb_construct_send_urb(adapter, port, ep,
1057                                                              context, skb_send);
1058                         if (ret == -1)
1059                                 mwifiex_write_data_complete(adapter, skb_send,
1060                                                             0, -1);
1061                 }
1062         }
1063
1064         if (f_send_cur_buf) {
1065                 if (f_send_aggr_buf) {
1066                         if (atomic_read(&port->tx_data_urb_pending) >=
1067                             MWIFIEX_TX_DATA_URB) {
1068                                 port->block_status = true;
1069                                 adapter->data_sent =
1070                                         mwifiex_usb_data_sent(adapter);
1071                                 /* no available urb, postcopy packet*/
1072                                 f_postcopy_cur_buf = 1;
1073                                 goto postcopy_cur_buf;
1074                         }
1075
1076                         if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
1077                                 port->tx_data_ix = 0;
1078                 }
1079
1080                 payload = skb->data;
1081                 *(u16 *)&payload[2] =
1082                         cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2 | 0x80);
1083                 *(u16 *)payload = cpu_to_le16(skb->len);
1084                 skb_send = skb;
1085                 context = &port->tx_data_list[port->tx_data_ix++];
1086                 return mwifiex_usb_construct_send_urb(adapter, port, ep,
1087                                                       context, skb_send);
1088         }
1089
1090 postcopy_cur_buf:
1091         if (f_postcopy_cur_buf) {
1092                 skb_queue_tail(&port->tx_aggr.aggr_list, skb);
1093                 port->tx_aggr.aggr_len += (skb->len + pad);
1094                 port->tx_aggr.aggr_num++;
1095                 /* New aggregation begin, start timer */
1096                 if (!port->tx_aggr.timer_cnxt.is_hold_timer_set) {
1097                         port->tx_aggr.timer_cnxt.hold_tmo_msecs =
1098                                         MWIFIEX_USB_TX_AGGR_TMO_MIN;
1099                         timeout = port->tx_aggr.timer_cnxt.hold_tmo_msecs;
1100                         mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
1101                                   jiffies + msecs_to_jiffies(timeout));
1102                         port->tx_aggr.timer_cnxt.is_hold_timer_set = true;
1103                 }
1104         }
1105
1106         return -EINPROGRESS;
1107 }
1108
1109 static void mwifiex_usb_tx_aggr_tmo(struct timer_list *t)
1110 {
1111         struct urb_context *urb_cnxt = NULL;
1112         struct sk_buff *skb_send = NULL;
1113         struct tx_aggr_tmr_cnxt *timer_context =
1114                 from_timer(timer_context, t, hold_timer);
1115         struct mwifiex_adapter *adapter = timer_context->adapter;
1116         struct usb_tx_data_port *port = timer_context->port;
1117         unsigned long flags;
1118         int err = 0;
1119
1120         spin_lock_irqsave(&port->tx_aggr_lock, flags);
1121         err = mwifiex_usb_prepare_tx_aggr_skb(adapter, port, &skb_send);
1122         if (err) {
1123                 mwifiex_dbg(adapter, ERROR,
1124                             "prepare tx aggr skb failed, err=%d\n", err);
1125                 goto unlock;
1126         }
1127
1128         if (atomic_read(&port->tx_data_urb_pending) >=
1129             MWIFIEX_TX_DATA_URB) {
1130                 port->block_status = true;
1131                 adapter->data_sent =
1132                         mwifiex_usb_data_sent(adapter);
1133                 err = -1;
1134                 goto done;
1135         }
1136
1137         if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
1138                 port->tx_data_ix = 0;
1139
1140         urb_cnxt = &port->tx_data_list[port->tx_data_ix++];
1141         err = mwifiex_usb_construct_send_urb(adapter, port, port->tx_data_ep,
1142                                              urb_cnxt, skb_send);
1143 done:
1144         if (err == -1)
1145                 mwifiex_write_data_complete(adapter, skb_send, 0, -1);
1146 unlock:
1147         spin_unlock_irqrestore(&port->tx_aggr_lock, flags);
1148 }
1149
1150 /* This function write a command/data packet to card. */
1151 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
1152                                     struct sk_buff *skb,
1153                                     struct mwifiex_tx_param *tx_param)
1154 {
1155         struct usb_card_rec *card = adapter->card;
1156         struct urb_context *context = NULL;
1157         struct usb_tx_data_port *port = NULL;
1158         unsigned long flags;
1159         int idx, ret;
1160
1161         if (adapter->is_suspended) {
1162                 mwifiex_dbg(adapter, ERROR,
1163                             "%s: not allowed while suspended\n", __func__);
1164                 return -1;
1165         }
1166
1167         if (adapter->surprise_removed) {
1168                 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
1169                 return -1;
1170         }
1171
1172         mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
1173
1174         if (ep == card->tx_cmd_ep) {
1175                 context = &card->tx_cmd;
1176         } else {
1177                 /* get the data port structure for endpoint */
1178                 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
1179                         if (ep == card->port[idx].tx_data_ep) {
1180                                 port = &card->port[idx];
1181                                 if (atomic_read(&port->tx_data_urb_pending)
1182                                     >= MWIFIEX_TX_DATA_URB) {
1183                                         port->block_status = true;
1184                                         adapter->data_sent =
1185                                                 mwifiex_usb_data_sent(adapter);
1186                                         return -EBUSY;
1187                                 }
1188                                 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
1189                                         port->tx_data_ix = 0;
1190                                 break;
1191                         }
1192                 }
1193
1194                 if (!port) {
1195                         mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
1196                         return -1;
1197                 }
1198
1199                 if (adapter->bus_aggr.enable) {
1200                         spin_lock_irqsave(&port->tx_aggr_lock, flags);
1201                         ret =  mwifiex_usb_aggr_tx_data(adapter, ep, skb,
1202                                                         tx_param, port);
1203                         spin_unlock_irqrestore(&port->tx_aggr_lock, flags);
1204                         return ret;
1205                 }
1206
1207                 context = &port->tx_data_list[port->tx_data_ix++];
1208         }
1209
1210         return mwifiex_usb_construct_send_urb(adapter, port, ep, context, skb);
1211 }
1212
1213 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
1214 {
1215         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1216         struct usb_tx_data_port *port;
1217         int i, j;
1218
1219         card->tx_cmd.adapter = adapter;
1220         card->tx_cmd.ep = card->tx_cmd_ep;
1221
1222         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
1223         if (!card->tx_cmd.urb)
1224                 return -ENOMEM;
1225
1226         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
1227                 port = &card->port[i];
1228                 if (!port->tx_data_ep)
1229                         continue;
1230                 port->tx_data_ix = 0;
1231                 skb_queue_head_init(&port->tx_aggr.aggr_list);
1232                 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
1233                         port->block_status = false;
1234                 else
1235                         port->block_status = true;
1236                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
1237                         port->tx_data_list[j].adapter = adapter;
1238                         port->tx_data_list[j].ep = port->tx_data_ep;
1239                         port->tx_data_list[j].urb =
1240                                         usb_alloc_urb(0, GFP_KERNEL);
1241                         if (!port->tx_data_list[j].urb)
1242                                 return -ENOMEM;
1243                 }
1244
1245                 port->tx_aggr.timer_cnxt.adapter = adapter;
1246                 port->tx_aggr.timer_cnxt.port = port;
1247                 port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
1248                 port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
1249                 timer_setup(&port->tx_aggr.timer_cnxt.hold_timer,
1250                             mwifiex_usb_tx_aggr_tmo, 0);
1251         }
1252
1253         return 0;
1254 }
1255
1256 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
1257 {
1258         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1259         int i;
1260
1261         card->rx_cmd.adapter = adapter;
1262         card->rx_cmd.ep = card->rx_cmd_ep;
1263
1264         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
1265         if (!card->rx_cmd.urb)
1266                 return -ENOMEM;
1267
1268         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
1269         if (!card->rx_cmd.skb)
1270                 return -ENOMEM;
1271
1272         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
1273                 return -1;
1274
1275         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1276                 card->rx_data_list[i].adapter = adapter;
1277                 card->rx_data_list[i].ep = card->rx_data_ep;
1278
1279                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1280                 if (!card->rx_data_list[i].urb)
1281                         return -1;
1282                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
1283                                               MWIFIEX_RX_DATA_BUF_SIZE))
1284                         return -1;
1285         }
1286
1287         return 0;
1288 }
1289
1290 /* This function register usb device and initialize parameter. */
1291 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1292 {
1293         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1294
1295         card->adapter = adapter;
1296
1297         switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
1298         case USB8997_PID_1:
1299         case USB8997_PID_2:
1300                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
1301                 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
1302                 adapter->ext_scan = true;
1303                 break;
1304         case USB8766_PID_1:
1305         case USB8766_PID_2:
1306                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
1307                 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
1308                 adapter->ext_scan = true;
1309                 break;
1310         case USB8801_PID_1:
1311         case USB8801_PID_2:
1312                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
1313                 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
1314                 adapter->ext_scan = false;
1315                 break;
1316         case USB8797_PID_1:
1317         case USB8797_PID_2:
1318         default:
1319                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
1320                 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
1321                 break;
1322         }
1323
1324         adapter->usb_mc_status = false;
1325         adapter->usb_mc_setup = false;
1326
1327         return 0;
1328 }
1329
1330 static void mwifiex_usb_cleanup_tx_aggr(struct mwifiex_adapter *adapter)
1331 {
1332         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1333         struct usb_tx_data_port *port;
1334         struct sk_buff *skb_tmp;
1335         int idx;
1336
1337         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
1338                 port = &card->port[idx];
1339                 if (adapter->bus_aggr.enable)
1340                         while ((skb_tmp =
1341                                 skb_dequeue(&port->tx_aggr.aggr_list)))
1342                                 mwifiex_write_data_complete(adapter, skb_tmp,
1343                                                             0, -1);
1344                 del_timer_sync(&port->tx_aggr.timer_cnxt.hold_timer);
1345                 port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
1346                 port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
1347         }
1348 }
1349
1350 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1351 {
1352         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1353
1354         mwifiex_usb_free(card);
1355
1356         mwifiex_usb_cleanup_tx_aggr(adapter);
1357
1358         card->adapter = NULL;
1359 }
1360
1361 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
1362                                     struct mwifiex_fw_image *fw)
1363 {
1364         int ret = 0;
1365         u8 *firmware = fw->fw_buf, *recv_buff;
1366         u32 retries = USB8XXX_FW_MAX_RETRY + 1;
1367         u32 dlen;
1368         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1369         struct fw_data *fwdata;
1370         struct fw_sync_header sync_fw;
1371         u8 check_winner = 1;
1372
1373         if (!firmware) {
1374                 mwifiex_dbg(adapter, ERROR,
1375                             "No firmware image found! Terminating download\n");
1376                 ret = -1;
1377                 goto fw_exit;
1378         }
1379
1380         /* Allocate memory for transmit */
1381         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1382         if (!fwdata) {
1383                 ret = -ENOMEM;
1384                 goto fw_exit;
1385         }
1386
1387         /* Allocate memory for receive */
1388         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1389         if (!recv_buff) {
1390                 ret = -ENOMEM;
1391                 goto cleanup;
1392         }
1393
1394         do {
1395                 /* Send pseudo data to check winner status first */
1396                 if (check_winner) {
1397                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1398                         dlen = 0;
1399                 } else {
1400                         /* copy the header of the fw_data to get the length */
1401                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
1402                                sizeof(struct fw_header));
1403
1404                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1405                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1406                         tlen += sizeof(struct fw_header);
1407
1408                         /* Command 7 doesn't have data length field */
1409                         if (dnld_cmd == FW_CMD_7)
1410                                 dlen = 0;
1411
1412                         memcpy(fwdata->data, &firmware[tlen], dlen);
1413
1414                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
1415                         tlen += dlen;
1416                 }
1417
1418                 /* If the send/receive fails or CRC occurs then retry */
1419                 while (--retries) {
1420                         u8 *buf = (u8 *)fwdata;
1421                         u32 len = FW_DATA_XMIT_SIZE;
1422
1423                         /* send the firmware block */
1424                         ret = mwifiex_write_data_sync(adapter, buf, &len,
1425                                                 MWIFIEX_USB_EP_CMD_EVENT,
1426                                                 MWIFIEX_USB_TIMEOUT);
1427                         if (ret) {
1428                                 mwifiex_dbg(adapter, ERROR,
1429                                             "write_data_sync: failed: %d\n",
1430                                             ret);
1431                                 continue;
1432                         }
1433
1434                         buf = recv_buff;
1435                         len = FW_DNLD_RX_BUF_SIZE;
1436
1437                         /* Receive the firmware block response */
1438                         ret = mwifiex_read_data_sync(adapter, buf, &len,
1439                                                 MWIFIEX_USB_EP_CMD_EVENT,
1440                                                 MWIFIEX_USB_TIMEOUT);
1441                         if (ret) {
1442                                 mwifiex_dbg(adapter, ERROR,
1443                                             "read_data_sync: failed: %d\n",
1444                                             ret);
1445                                 continue;
1446                         }
1447
1448                         memcpy(&sync_fw, recv_buff,
1449                                sizeof(struct fw_sync_header));
1450
1451                         /* check 1st firmware block resp for highest bit set */
1452                         if (check_winner) {
1453                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1454                                         mwifiex_dbg(adapter, WARN,
1455                                                     "USB is not the winner %#x\n",
1456                                                     sync_fw.cmd);
1457
1458                                         /* returning success */
1459                                         ret = 0;
1460                                         goto cleanup;
1461                                 }
1462
1463                                 mwifiex_dbg(adapter, MSG,
1464                                             "start to download FW...\n");
1465
1466                                 check_winner = 0;
1467                                 break;
1468                         }
1469
1470                         /* check the firmware block response for CRC errors */
1471                         if (sync_fw.cmd) {
1472                                 mwifiex_dbg(adapter, ERROR,
1473                                             "FW received block with CRC %#x\n",
1474                                             sync_fw.cmd);
1475                                 ret = -1;
1476                                 continue;
1477                         }
1478
1479                         retries = USB8XXX_FW_MAX_RETRY + 1;
1480                         break;
1481                 }
1482                 fw_seqnum++;
1483         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1484
1485 cleanup:
1486         mwifiex_dbg(adapter, MSG,
1487                     "info: FW download over, size %d bytes\n", tlen);
1488
1489         kfree(recv_buff);
1490         kfree(fwdata);
1491
1492         if (retries)
1493                 ret = 0;
1494 fw_exit:
1495         return ret;
1496 }
1497
1498 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1499                         struct mwifiex_fw_image *fw)
1500 {
1501         int ret;
1502         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1503
1504         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1505                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1506                 if (ret)
1507                         return -1;
1508
1509                 /* Boot state changes after successful firmware download */
1510                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1511                         return -1;
1512         }
1513
1514         ret = mwifiex_usb_rx_init(adapter);
1515         if (!ret)
1516                 ret = mwifiex_usb_tx_init(adapter);
1517
1518         return ret;
1519 }
1520
1521 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1522 {
1523         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1524
1525         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1526         if ((ep == card->rx_cmd_ep) &&
1527             (!atomic_read(&card->rx_cmd_urb_pending)))
1528                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1529                                           MWIFIEX_RX_CMD_BUF_SIZE);
1530
1531         return;
1532 }
1533
1534 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1535                                        struct sk_buff *skb)
1536 {
1537         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1538
1539         return 0;
1540 }
1541
1542 /* This function wakes up the card. */
1543 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1544 {
1545         /* Simulation of HS_AWAKE event */
1546         adapter->pm_wakeup_fw_try = false;
1547         del_timer(&adapter->wakeup_timer);
1548         adapter->pm_wakeup_card_req = false;
1549         adapter->ps_state = PS_STATE_AWAKE;
1550
1551         return 0;
1552 }
1553
1554 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1555 {
1556         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1557         int i;
1558         struct urb_context *ctx;
1559
1560         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1561                 if (card->rx_data_list[i].skb)
1562                         continue;
1563                 ctx = &card->rx_data_list[i];
1564                 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1565         }
1566 }
1567
1568 /* This function is called after the card has woken up. */
1569 static inline int
1570 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1571 {
1572         return 0;
1573 }
1574
1575 static struct mwifiex_if_ops usb_ops = {
1576         .register_dev =         mwifiex_register_dev,
1577         .unregister_dev =       mwifiex_unregister_dev,
1578         .wakeup =               mwifiex_pm_wakeup_card,
1579         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
1580
1581         /* USB specific */
1582         .dnld_fw =              mwifiex_usb_dnld_fw,
1583         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
1584         .event_complete =       mwifiex_usb_cmd_event_complete,
1585         .host_to_card =         mwifiex_usb_host_to_card,
1586         .submit_rem_rx_urbs =   mwifiex_usb_submit_rem_rx_urbs,
1587         .multi_port_resync =    mwifiex_usb_port_resync,
1588         .is_port_ready =        mwifiex_usb_is_port_ready,
1589 };
1590
1591 module_usb_driver(mwifiex_usb_driver);
1592
1593 MODULE_AUTHOR("Marvell International Ltd.");
1594 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1595 MODULE_VERSION(USB_VERSION);
1596 MODULE_LICENSE("GPL v2");
1597 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1598 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1599 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1600 MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);