drivers/net/wireless/ath/ath6kl/usb.c

   1 /*
   2  * Copyright (c) 2007-2011 Atheros Communications Inc.
   3  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/usb.h>
  20
  21 #include "debug.h"
  22 #include "core.h"
  23
  24 /* constants */
  25 #define TX_URB_COUNT            32
  26 #define RX_URB_COUNT            32
  27 #define ATH6KL_USB_RX_BUFFER_SIZE  4096
  28
  29 /* tx/rx pipes for usb */
  30 enum ATH6KL_USB_PIPE_ID {
  31         ATH6KL_USB_PIPE_TX_CTRL = 0,
  32         ATH6KL_USB_PIPE_TX_DATA_LP,
  33         ATH6KL_USB_PIPE_TX_DATA_MP,
  34         ATH6KL_USB_PIPE_TX_DATA_HP,
  35         ATH6KL_USB_PIPE_RX_CTRL,
  36         ATH6KL_USB_PIPE_RX_DATA,
  37         ATH6KL_USB_PIPE_RX_DATA2,
  38         ATH6KL_USB_PIPE_RX_INT,
  39         ATH6KL_USB_PIPE_MAX
  40 };
  41
  42 #define ATH6KL_USB_PIPE_INVALID ATH6KL_USB_PIPE_MAX
  43
  44 struct ath6kl_usb_pipe {
  45         struct list_head urb_list_head;
  46         struct usb_anchor urb_submitted;
  47         u32 urb_alloc;
  48         u32 urb_cnt;
  49         u32 urb_cnt_thresh;
  50         unsigned int usb_pipe_handle;
  51         u32 flags;
  52         u8 ep_address;
  53         u8 logical_pipe_num;
  54         struct ath6kl_usb *ar_usb;
  55         u16 max_packet_size;
  56         struct work_struct io_complete_work;
  57         struct sk_buff_head io_comp_queue;
  58         struct usb_endpoint_descriptor *ep_desc;
  59 };
  60
  61 #define ATH6KL_USB_PIPE_FLAG_TX    (1 << 0)
  62
  63 /* usb device object */
  64 struct ath6kl_usb {
  65         /* protects pipe->urb_list_head and  pipe->urb_cnt */
  66         spinlock_t cs_lock;
  67
  68         struct usb_device *udev;
  69         struct usb_interface *interface;
  70         struct ath6kl_usb_pipe pipes[ATH6KL_USB_PIPE_MAX];
  71         u8 *diag_cmd_buffer;
  72         u8 *diag_resp_buffer;
  73         struct ath6kl *ar;
  74 };
  75
  76 /* usb urb object */
  77 struct ath6kl_urb_context {
  78         struct list_head link;
  79         struct ath6kl_usb_pipe *pipe;
  80         struct sk_buff *skb;
  81         struct ath6kl *ar;
  82 };
  83
  84 /* USB endpoint definitions */
  85 #define ATH6KL_USB_EP_ADDR_APP_CTRL_IN          0x81
  86 #define ATH6KL_USB_EP_ADDR_APP_DATA_IN          0x82
  87 #define ATH6KL_USB_EP_ADDR_APP_DATA2_IN         0x83
  88 #define ATH6KL_USB_EP_ADDR_APP_INT_IN           0x84
  89
  90 #define ATH6KL_USB_EP_ADDR_APP_CTRL_OUT         0x01
  91 #define ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT      0x02
  92 #define ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT      0x03
  93 #define ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT      0x04
  94
  95 /* diagnostic command defnitions */
  96 #define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD        1
  97 #define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP       2
  98 #define ATH6KL_USB_CONTROL_REQ_DIAG_CMD            3
  99 #define ATH6KL_USB_CONTROL_REQ_DIAG_RESP           4
 100
 101 #define ATH6KL_USB_CTRL_DIAG_CC_READ               0
 102 #define ATH6KL_USB_CTRL_DIAG_CC_WRITE              1
 103
 104 struct ath6kl_usb_ctrl_diag_cmd_write {
 105         __le32 cmd;
 106         __le32 address;
 107         __le32 value;
 108         __le32 _pad[1];
 109 } __packed;
 110
 111 struct ath6kl_usb_ctrl_diag_cmd_read {
 112         __le32 cmd;
 113         __le32 address;
 114 } __packed;
 115
 116 struct ath6kl_usb_ctrl_diag_resp_read {
 117         __le32 value;
 118 } __packed;
 119
 120 /* function declarations */
 121 static void ath6kl_usb_recv_complete(struct urb *urb);
 122
 123 #define ATH6KL_USB_IS_BULK_EP(attr) (((attr) & 3) == 0x02)
 124 #define ATH6KL_USB_IS_INT_EP(attr)  (((attr) & 3) == 0x03)
 125 #define ATH6KL_USB_IS_ISOC_EP(attr)  (((attr) & 3) == 0x01)
 126 #define ATH6KL_USB_IS_DIR_IN(addr)  ((addr) & 0x80)
 127
 128 /* pipe/urb operations */
 129 static struct ath6kl_urb_context *
 130 ath6kl_usb_alloc_urb_from_pipe(struct ath6kl_usb_pipe *pipe)
 131 {
 132         struct ath6kl_urb_context *urb_context = NULL;
 133         unsigned long flags;
 134
 135         spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
 136         if (!list_empty(&pipe->urb_list_head)) {
 137                 urb_context =
 138                     list_first_entry(&pipe->urb_list_head,
 139                                      struct ath6kl_urb_context, link);
 140                 list_del(&urb_context->link);
 141                 pipe->urb_cnt--;
 142         }
 143         spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
 144
 145         return urb_context;
 146 }
 147
 148 static void ath6kl_usb_free_urb_to_pipe(struct ath6kl_usb_pipe *pipe,
 149                                         struct ath6kl_urb_context *urb_context)
 150 {
 151         unsigned long flags;
 152
 153         spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
 154         pipe->urb_cnt++;
 155
 156         list_add(&urb_context->link, &pipe->urb_list_head);
 157         spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
 158 }
 159
 160 static void ath6kl_usb_cleanup_recv_urb(struct ath6kl_urb_context *urb_context)
 161 {
 162         dev_kfree_skb(urb_context->skb);
 163         urb_context->skb = NULL;
 164
 165         ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
 166 }
 167
 168 static inline struct ath6kl_usb *ath6kl_usb_priv(struct ath6kl *ar)
 169 {
 170         return ar->hif_priv;
 171 }
 172
 173 /* pipe resource allocation/cleanup */
 174 static int ath6kl_usb_alloc_pipe_resources(struct ath6kl_usb_pipe *pipe,
 175                                            int urb_cnt)
 176 {
 177         struct ath6kl_urb_context *urb_context;
 178         int status = 0, i;
 179
 180         INIT_LIST_HEAD(&pipe->urb_list_head);
 181         init_usb_anchor(&pipe->urb_submitted);
 182
 183         for (i = 0; i < urb_cnt; i++) {
 184                 urb_context = kzalloc(sizeof(struct ath6kl_urb_context),
 185                                       GFP_KERNEL);
 186                 if (urb_context == NULL) {
 187                         status = -ENOMEM;
 188                         goto fail_alloc_pipe_resources;
 189                 }
 190
 191                 urb_context->pipe = pipe;
 192
 193                 /*
 194                  * we are only allocate the urb contexts here, the actual URB
 195                  * is allocated from the kernel as needed to do a transaction
 196                  */
 197                 pipe->urb_alloc++;
 198                 ath6kl_usb_free_urb_to_pipe(pipe, urb_context);
 199         }
 200
 201         ath6kl_dbg(ATH6KL_DBG_USB,
 202                    "ath6kl usb: alloc resources lpipe:%d hpipe:0x%X urbs:%d\n",
 203                    pipe->logical_pipe_num, pipe->usb_pipe_handle,
 204                    pipe->urb_alloc);
 205
 206 fail_alloc_pipe_resources:
 207         return status;
 208 }
 209
 210 static void ath6kl_usb_free_pipe_resources(struct ath6kl_usb_pipe *pipe)
 211 {
 212         struct ath6kl_urb_context *urb_context;
 213
 214         if (pipe->ar_usb == NULL) {
 215                 /* nothing allocated for this pipe */
 216                 return;
 217         }
 218
 219         ath6kl_dbg(ATH6KL_DBG_USB,
 220                    "ath6kl usb: free resources lpipe:%d"
 221                    "hpipe:0x%X urbs:%d avail:%d\n",
 222                    pipe->logical_pipe_num, pipe->usb_pipe_handle,
 223                    pipe->urb_alloc, pipe->urb_cnt);
 224
 225         if (pipe->urb_alloc != pipe->urb_cnt) {
 226                 ath6kl_dbg(ATH6KL_DBG_USB,
 227                            "ath6kl usb: urb leak! lpipe:%d"
 228                            "hpipe:0x%X urbs:%d avail:%d\n",
 229                            pipe->logical_pipe_num, pipe->usb_pipe_handle,
 230                            pipe->urb_alloc, pipe->urb_cnt);
 231         }
 232
 233         while (true) {
 234                 urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);
 235                 if (urb_context == NULL)
 236                         break;
 237                 kfree(urb_context);
 238         }
 239
 240 }
 241
 242 static void ath6kl_usb_cleanup_pipe_resources(struct ath6kl_usb *ar_usb)
 243 {
 244         int i;
 245
 246         for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++)
 247                 ath6kl_usb_free_pipe_resources(&ar_usb->pipes[i]);
 248
 249 }
 250
 251 static u8 ath6kl_usb_get_logical_pipe_num(struct ath6kl_usb *ar_usb,
 252                                           u8 ep_address, int *urb_count)
 253 {
 254         u8 pipe_num = ATH6KL_USB_PIPE_INVALID;
 255
 256         switch (ep_address) {
 257         case ATH6KL_USB_EP_ADDR_APP_CTRL_IN:
 258                 pipe_num = ATH6KL_USB_PIPE_RX_CTRL;
 259                 *urb_count = RX_URB_COUNT;
 260                 break;
 261         case ATH6KL_USB_EP_ADDR_APP_DATA_IN:
 262                 pipe_num = ATH6KL_USB_PIPE_RX_DATA;
 263                 *urb_count = RX_URB_COUNT;
 264                 break;
 265         case ATH6KL_USB_EP_ADDR_APP_INT_IN:
 266                 pipe_num = ATH6KL_USB_PIPE_RX_INT;
 267                 *urb_count = RX_URB_COUNT;
 268                 break;
 269         case ATH6KL_USB_EP_ADDR_APP_DATA2_IN:
 270                 pipe_num = ATH6KL_USB_PIPE_RX_DATA2;
 271                 *urb_count = RX_URB_COUNT;
 272                 break;
 273         case ATH6KL_USB_EP_ADDR_APP_CTRL_OUT:
 274                 pipe_num = ATH6KL_USB_PIPE_TX_CTRL;
 275                 *urb_count = TX_URB_COUNT;
 276                 break;
 277         case ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT:
 278                 pipe_num = ATH6KL_USB_PIPE_TX_DATA_LP;
 279                 *urb_count = TX_URB_COUNT;
 280                 break;
 281         case ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT:
 282                 pipe_num = ATH6KL_USB_PIPE_TX_DATA_MP;
 283                 *urb_count = TX_URB_COUNT;
 284                 break;
 285         case ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT:
 286                 pipe_num = ATH6KL_USB_PIPE_TX_DATA_HP;
 287                 *urb_count = TX_URB_COUNT;
 288                 break;
 289         default:
 290                 /* note: there may be endpoints not currently used */
 291                 break;
 292         }
 293
 294         return pipe_num;
 295 }
 296
 297 static int ath6kl_usb_setup_pipe_resources(struct ath6kl_usb *ar_usb)
 298 {
 299         struct usb_interface *interface = ar_usb->interface;
 300         struct usb_host_interface *iface_desc = interface->cur_altsetting;
 301         struct usb_endpoint_descriptor *endpoint;
 302         struct ath6kl_usb_pipe *pipe;
 303         int i, urbcount, status = 0;
 304         u8 pipe_num;
 305
 306         ath6kl_dbg(ATH6KL_DBG_USB, "setting up USB Pipes using interface\n");
 307
 308         /* walk decriptors and setup pipes */
 309         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 310                 endpoint = &iface_desc->endpoint[i].desc;
 311
 312                 if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
 313                         ath6kl_dbg(ATH6KL_DBG_USB,
 314                                    "%s Bulk Ep:0x%2.2X maxpktsz:%d\n",
 315                                    ATH6KL_USB_IS_DIR_IN
 316                                    (endpoint->bEndpointAddress) ?
 317                                    "RX" : "TX", endpoint->bEndpointAddress,
 318                                    le16_to_cpu(endpoint->wMaxPacketSize));
 319                 } else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
 320                         ath6kl_dbg(ATH6KL_DBG_USB,
 321                                    "%s Int Ep:0x%2.2X maxpktsz:%d interval:%d\n",
 322                                    ATH6KL_USB_IS_DIR_IN
 323                                    (endpoint->bEndpointAddress) ?
 324                                    "RX" : "TX", endpoint->bEndpointAddress,
 325                                    le16_to_cpu(endpoint->wMaxPacketSize),
 326                                    endpoint->bInterval);
 327                 } else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
 328                         /* TODO for ISO */
 329                         ath6kl_dbg(ATH6KL_DBG_USB,
 330                                    "%s ISOC Ep:0x%2.2X maxpktsz:%d interval:%d\n",
 331                                    ATH6KL_USB_IS_DIR_IN
 332                                    (endpoint->bEndpointAddress) ?
 333                                    "RX" : "TX", endpoint->bEndpointAddress,
 334                                    le16_to_cpu(endpoint->wMaxPacketSize),
 335                                    endpoint->bInterval);
 336                 }
 337                 urbcount = 0;
 338
 339                 pipe_num =
 340                     ath6kl_usb_get_logical_pipe_num(ar_usb,
 341                                                     endpoint->bEndpointAddress,
 342                                                     &urbcount);
 343                 if (pipe_num == ATH6KL_USB_PIPE_INVALID)
 344                         continue;
 345
 346                 pipe = &ar_usb->pipes[pipe_num];
 347                 if (pipe->ar_usb != NULL) {
 348                         /* hmmm..pipe was already setup */
 349                         continue;
 350                 }
 351
 352                 pipe->ar_usb = ar_usb;
 353                 pipe->logical_pipe_num = pipe_num;
 354                 pipe->ep_address = endpoint->bEndpointAddress;
 355                 pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize);
 356
 357                 if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
 358                         if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
 359                                 pipe->usb_pipe_handle =
 360                                     usb_rcvbulkpipe(ar_usb->udev,
 361                                                     pipe->ep_address);
 362                         } else {
 363                                 pipe->usb_pipe_handle =
 364                                     usb_sndbulkpipe(ar_usb->udev,
 365                                                     pipe->ep_address);
 366                         }
 367                 } else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
 368                         if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
 369                                 pipe->usb_pipe_handle =
 370                                     usb_rcvintpipe(ar_usb->udev,
 371                                                    pipe->ep_address);
 372                         } else {
 373                                 pipe->usb_pipe_handle =
 374                                     usb_sndintpipe(ar_usb->udev,
 375                                                    pipe->ep_address);
 376                         }
 377                 } else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
 378                         /* TODO for ISO */
 379                         if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
 380                                 pipe->usb_pipe_handle =
 381                                     usb_rcvisocpipe(ar_usb->udev,
 382                                                     pipe->ep_address);
 383                         } else {
 384                                 pipe->usb_pipe_handle =
 385                                     usb_sndisocpipe(ar_usb->udev,
 386                                                     pipe->ep_address);
 387                         }
 388                 }
 389
 390                 pipe->ep_desc = endpoint;
 391
 392                 if (!ATH6KL_USB_IS_DIR_IN(pipe->ep_address))
 393                         pipe->flags |= ATH6KL_USB_PIPE_FLAG_TX;
 394
 395                 status = ath6kl_usb_alloc_pipe_resources(pipe, urbcount);
 396                 if (status != 0)
 397                         break;
 398         }
 399
 400         return status;
 401 }
 402
 403 /* pipe operations */
 404 static void ath6kl_usb_post_recv_transfers(struct ath6kl_usb_pipe *recv_pipe,
 405                                            int buffer_length)
 406 {
 407         struct ath6kl_urb_context *urb_context;
 408         struct urb *urb;
 409         int usb_status;
 410
 411         while (true) {
 412                 urb_context = ath6kl_usb_alloc_urb_from_pipe(recv_pipe);
 413                 if (urb_context == NULL)
 414                         break;
 415
 416                 urb_context->skb = dev_alloc_skb(buffer_length);
 417                 if (urb_context->skb == NULL)
 418                         goto err_cleanup_urb;
 419
 420                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 421                 if (urb == NULL)
 422                         goto err_cleanup_urb;
 423
 424                 usb_fill_bulk_urb(urb,
 425                                   recv_pipe->ar_usb->udev,
 426                                   recv_pipe->usb_pipe_handle,
 427                                   urb_context->skb->data,
 428                                   buffer_length,
 429                                   ath6kl_usb_recv_complete, urb_context);
 430
 431                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 432                            "ath6kl usb: bulk recv submit:%d, 0x%X (ep:0x%2.2X), %d bytes buf:0x%p\n",
 433                            recv_pipe->logical_pipe_num,
 434                            recv_pipe->usb_pipe_handle, recv_pipe->ep_address,
 435                            buffer_length, urb_context->skb);
 436
 437                 usb_anchor_urb(urb, &recv_pipe->urb_submitted);
 438                 usb_status = usb_submit_urb(urb, GFP_ATOMIC);
 439
 440                 if (usb_status) {
 441                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 442                                    "ath6kl usb : usb bulk recv failed %d\n",
 443                                    usb_status);
 444                         usb_unanchor_urb(urb);
 445                         usb_free_urb(urb);
 446                         goto err_cleanup_urb;
 447                 }
 448                 usb_free_urb(urb);
 449         }
 450         return;
 451
 452 err_cleanup_urb:
 453         ath6kl_usb_cleanup_recv_urb(urb_context);
 454         return;
 455 }
 456
 457 static void ath6kl_usb_flush_all(struct ath6kl_usb *ar_usb)
 458 {
 459         int i;
 460
 461         for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
 462                 if (ar_usb->pipes[i].ar_usb != NULL)
 463                         usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted);
 464         }
 465
 466         /*
 467          * Flushing any pending I/O may schedule work this call will block
 468          * until all scheduled work runs to completion.
 469          */
 470         flush_scheduled_work();
 471 }
 472
 473 static void ath6kl_usb_start_recv_pipes(struct ath6kl_usb *ar_usb)
 474 {
 475         /*
 476          * note: control pipe is no longer used
 477          * ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_cnt_thresh =
 478          *      ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_alloc/2;
 479          * ath6kl_usb_post_recv_transfers(&ar_usb->
 480          *              pipes[ATH6KL_USB_PIPE_RX_CTRL],
 481          *              ATH6KL_USB_RX_BUFFER_SIZE);
 482          */
 483
 484         ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh = 1;
 485
 486         ath6kl_usb_post_recv_transfers(&ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA],
 487                                        ATH6KL_USB_RX_BUFFER_SIZE);
 488 }
 489
 490 /* hif usb rx/tx completion functions */
 491 static void ath6kl_usb_recv_complete(struct urb *urb)
 492 {
 493         struct ath6kl_urb_context *urb_context = urb->context;
 494         struct ath6kl_usb_pipe *pipe = urb_context->pipe;
 495         struct sk_buff *skb = NULL;
 496         int status = 0;
 497
 498         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 499                    "%s: recv pipe: %d, stat:%d, len:%d urb:0x%p\n", __func__,
 500                    pipe->logical_pipe_num, urb->status, urb->actual_length,
 501                    urb);
 502
 503         if (urb->status != 0) {
 504                 status = -EIO;
 505                 switch (urb->status) {
 506                 case -ECONNRESET:
 507                 case -ENOENT:
 508                 case -ESHUTDOWN:
 509                         /*
 510                          * no need to spew these errors when device
 511                          * removed or urb killed due to driver shutdown
 512                          */
 513                         status = -ECANCELED;
 514                         break;
 515                 default:
 516                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 517                                    "%s recv pipe: %d (ep:0x%2.2X), failed:%d\n",
 518                                    __func__, pipe->logical_pipe_num,
 519                                    pipe->ep_address, urb->status);
 520                         break;
 521                 }
 522                 goto cleanup_recv_urb;
 523         }
 524
 525         if (urb->actual_length == 0)
 526                 goto cleanup_recv_urb;
 527
 528         skb = urb_context->skb;
 529
 530         /* we are going to pass it up */
 531         urb_context->skb = NULL;
 532         skb_put(skb, urb->actual_length);
 533
 534         /* note: queue implements a lock */
 535         skb_queue_tail(&pipe->io_comp_queue, skb);
 536         schedule_work(&pipe->io_complete_work);
 537
 538 cleanup_recv_urb:
 539         ath6kl_usb_cleanup_recv_urb(urb_context);
 540
 541         if (status == 0 &&
 542             pipe->urb_cnt >= pipe->urb_cnt_thresh) {
 543                 /* our free urbs are piling up, post more transfers */
 544                 ath6kl_usb_post_recv_transfers(pipe, ATH6KL_USB_RX_BUFFER_SIZE);
 545         }
 546 }
 547
 548 static void ath6kl_usb_usb_transmit_complete(struct urb *urb)
 549 {
 550         struct ath6kl_urb_context *urb_context = urb->context;
 551         struct ath6kl_usb_pipe *pipe = urb_context->pipe;
 552         struct sk_buff *skb;
 553
 554         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 555                    "%s: pipe: %d, stat:%d, len:%d\n",
 556                    __func__, pipe->logical_pipe_num, urb->status,
 557                    urb->actual_length);
 558
 559         if (urb->status != 0) {
 560                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 561                            "%s:  pipe: %d, failed:%d\n",
 562                            __func__, pipe->logical_pipe_num, urb->status);
 563         }
 564
 565         skb = urb_context->skb;
 566         urb_context->skb = NULL;
 567         ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
 568
 569         /* note: queue implements a lock */
 570         skb_queue_tail(&pipe->io_comp_queue, skb);
 571         schedule_work(&pipe->io_complete_work);
 572 }
 573
 574 static void ath6kl_usb_io_comp_work(struct work_struct *work)
 575 {
 576         struct ath6kl_usb_pipe *pipe = container_of(work,
 577                                                     struct ath6kl_usb_pipe,
 578                                                     io_complete_work);
 579         struct ath6kl_usb *ar_usb;
 580         struct sk_buff *skb;
 581
 582         ar_usb = pipe->ar_usb;
 583
 584         while ((skb = skb_dequeue(&pipe->io_comp_queue))) {
 585                 if (pipe->flags & ATH6KL_USB_PIPE_FLAG_TX) {
 586                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 587                                    "ath6kl usb xmit callback buf:0x%p\n", skb);
 588                         ath6kl_core_tx_complete(ar_usb->ar, skb);
 589                 } else {
 590                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 591                                    "ath6kl usb recv callback buf:0x%p\n", skb);
 592                         ath6kl_core_rx_complete(ar_usb->ar, skb,
 593                                                 pipe->logical_pipe_num);
 594                 }
 595         }
 596 }
 597
 598 #define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write))
 599 #define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read))
 600
 601 static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb)
 602 {
 603         ath6kl_usb_flush_all(ar_usb);
 604
 605         ath6kl_usb_cleanup_pipe_resources(ar_usb);
 606
 607         usb_set_intfdata(ar_usb->interface, NULL);
 608
 609         kfree(ar_usb->diag_cmd_buffer);
 610         kfree(ar_usb->diag_resp_buffer);
 611
 612         kfree(ar_usb);
 613 }
 614
 615 static struct ath6kl_usb *ath6kl_usb_create(struct usb_interface *interface)
 616 {
 617         struct usb_device *dev = interface_to_usbdev(interface);
 618         struct ath6kl_usb *ar_usb;
 619         struct ath6kl_usb_pipe *pipe;
 620         int status = 0;
 621         int i;
 622
 623         ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL);
 624         if (ar_usb == NULL)
 625                 goto fail_ath6kl_usb_create;
 626
 627         usb_set_intfdata(interface, ar_usb);
 628         spin_lock_init(&(ar_usb->cs_lock));
 629         ar_usb->udev = dev;
 630         ar_usb->interface = interface;
 631
 632         for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
 633                 pipe = &ar_usb->pipes[i];
 634                 INIT_WORK(&pipe->io_complete_work,
 635                           ath6kl_usb_io_comp_work);
 636                 skb_queue_head_init(&pipe->io_comp_queue);
 637         }
 638
 639         ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL);
 640         if (ar_usb->diag_cmd_buffer == NULL) {
 641                 status = -ENOMEM;
 642                 goto fail_ath6kl_usb_create;
 643         }
 644
 645         ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP,
 646                                            GFP_KERNEL);
 647         if (ar_usb->diag_resp_buffer == NULL) {
 648                 status = -ENOMEM;
 649                 goto fail_ath6kl_usb_create;
 650         }
 651
 652         status = ath6kl_usb_setup_pipe_resources(ar_usb);
 653
 654 fail_ath6kl_usb_create:
 655         if (status != 0) {
 656                 ath6kl_usb_destroy(ar_usb);
 657                 ar_usb = NULL;
 658         }
 659         return ar_usb;
 660 }
 661
 662 static void ath6kl_usb_device_detached(struct usb_interface *interface)
 663 {
 664         struct ath6kl_usb *ar_usb;
 665
 666         ar_usb = usb_get_intfdata(interface);
 667         if (ar_usb == NULL)
 668                 return;
 669
 670         ath6kl_stop_txrx(ar_usb->ar);
 671
 672         /* Delay to wait for the target to reboot */
 673         mdelay(20);
 674         ath6kl_core_cleanup(ar_usb->ar);
 675         ath6kl_usb_destroy(ar_usb);
 676 }
 677
 678 /* exported hif usb APIs for htc pipe */
 679 static void hif_start(struct ath6kl *ar)
 680 {
 681         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 682         int i;
 683
 684         ath6kl_usb_start_recv_pipes(device);
 685
 686         /* set the TX resource avail threshold for each TX pipe */
 687         for (i = ATH6KL_USB_PIPE_TX_CTRL;
 688              i <= ATH6KL_USB_PIPE_TX_DATA_HP; i++) {
 689                 device->pipes[i].urb_cnt_thresh =
 690                     device->pipes[i].urb_alloc / 2;
 691         }
 692 }
 693
 694 static int ath6kl_usb_send(struct ath6kl *ar, u8 PipeID,
 695                            struct sk_buff *hdr_skb, struct sk_buff *skb)
 696 {
 697         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 698         struct ath6kl_usb_pipe *pipe = &device->pipes[PipeID];
 699         struct ath6kl_urb_context *urb_context;
 700         int usb_status, status = 0;
 701         struct urb *urb;
 702         u8 *data;
 703         u32 len;
 704
 705         ath6kl_dbg(ATH6KL_DBG_USB_BULK, "+%s pipe : %d, buf:0x%p\n",
 706                    __func__, PipeID, skb);
 707
 708         urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);
 709
 710         if (urb_context == NULL) {
 711                 /*
 712                  * TODO: it is possible to run out of urbs if
 713                  * 2 endpoints map to the same pipe ID
 714                  */
 715                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 716                            "%s pipe:%d no urbs left. URB Cnt : %d\n",
 717                            __func__, PipeID, pipe->urb_cnt);
 718                 status = -ENOMEM;
 719                 goto fail_hif_send;
 720         }
 721
 722         urb_context->skb = skb;
 723
 724         data = skb->data;
 725         len = skb->len;
 726
 727         urb = usb_alloc_urb(0, GFP_ATOMIC);
 728         if (urb == NULL) {
 729                 status = -ENOMEM;
 730                 ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
 731                                             urb_context);
 732                 goto fail_hif_send;
 733         }
 734
 735         usb_fill_bulk_urb(urb,
 736                           device->udev,
 737                           pipe->usb_pipe_handle,
 738                           data,
 739                           len,
 740                           ath6kl_usb_usb_transmit_complete, urb_context);
 741
 742         if ((len % pipe->max_packet_size) == 0) {
 743                 /* hit a max packet boundary on this pipe */
 744                 urb->transfer_flags |= URB_ZERO_PACKET;
 745         }
 746
 747         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 748                    "athusb bulk send submit:%d, 0x%X (ep:0x%2.2X), %d bytes\n",
 749                    pipe->logical_pipe_num, pipe->usb_pipe_handle,
 750                    pipe->ep_address, len);
 751
 752         usb_anchor_urb(urb, &pipe->urb_submitted);
 753         usb_status = usb_submit_urb(urb, GFP_ATOMIC);
 754
 755         if (usb_status) {
 756                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 757                            "ath6kl usb : usb bulk transmit failed %d\n",
 758                            usb_status);
 759                 usb_unanchor_urb(urb);
 760                 ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
 761                                             urb_context);
 762                 status = -EINVAL;
 763         }
 764         usb_free_urb(urb);
 765
 766 fail_hif_send:
 767         return status;
 768 }
 769
 770 static void hif_stop(struct ath6kl *ar)
 771 {
 772         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 773
 774         ath6kl_usb_flush_all(device);
 775 }
 776
 777 static void ath6kl_usb_get_default_pipe(struct ath6kl *ar,
 778                                         u8 *ul_pipe, u8 *dl_pipe)
 779 {
 780         *ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
 781         *dl_pipe = ATH6KL_USB_PIPE_RX_CTRL;
 782 }
 783
 784 static int ath6kl_usb_map_service_pipe(struct ath6kl *ar, u16 svc_id,
 785                                        u8 *ul_pipe, u8 *dl_pipe)
 786 {
 787         int status = 0;
 788
 789         switch (svc_id) {
 790         case HTC_CTRL_RSVD_SVC:
 791         case WMI_CONTROL_SVC:
 792                 *ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
 793                 /* due to large control packets, shift to data pipe */
 794                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 795                 break;
 796         case WMI_DATA_BE_SVC:
 797         case WMI_DATA_BK_SVC:
 798                 *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
 799                 /*
 800                 * Disable rxdata2 directly, it will be enabled
 801                 * if FW enable rxdata2
 802                 */
 803                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 804                 break;
 805         case WMI_DATA_VI_SVC:
 806
 807                 if (ar->hw.flags & ATH6KL_HW_MAP_LP_ENDPOINT)
 808                         *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
 809                 else
 810                         *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
 811                 /*
 812                 * Disable rxdata2 directly, it will be enabled
 813                 * if FW enable rxdata2
 814                 */
 815                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 816                 break;
 817         case WMI_DATA_VO_SVC:
 818
 819                 if (ar->hw.flags & ATH6KL_HW_MAP_LP_ENDPOINT)
 820                         *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
 821                 else
 822                         *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
 823                 /*
 824                 * Disable rxdata2 directly, it will be enabled
 825                 * if FW enable rxdata2
 826                 */
 827                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 828                 break;
 829         default:
 830                 status = -EPERM;
 831                 break;
 832         }
 833
 834         return status;
 835 }
 836
 837 static u16 ath6kl_usb_get_free_queue_number(struct ath6kl *ar, u8 pipe_id)
 838 {
 839         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 840
 841         return device->pipes[pipe_id].urb_cnt;
 842 }
 843
 844 static void hif_detach_htc(struct ath6kl *ar)
 845 {
 846         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 847
 848         ath6kl_usb_flush_all(device);
 849 }
 850
 851 static int ath6kl_usb_submit_ctrl_out(struct ath6kl_usb *ar_usb,
 852                                    u8 req, u16 value, u16 index, void *data,
 853                                    u32 size)
 854 {
 855         u8 *buf = NULL;
 856         int ret;
 857
 858         if (size > 0) {
 859                 buf = kmemdup(data, size, GFP_KERNEL);
 860                 if (buf == NULL)
 861                         return -ENOMEM;
 862         }
 863
 864         /* note: if successful returns number of bytes transfered */
 865         ret = usb_control_msg(ar_usb->udev,
 866                               usb_sndctrlpipe(ar_usb->udev, 0),
 867                               req,
 868                               USB_DIR_OUT | USB_TYPE_VENDOR |
 869                               USB_RECIP_DEVICE, value, index, buf,
 870                               size, 1000);
 871
 872         if (ret < 0) {
 873                 ath6kl_warn("Failed to submit usb control message: %d\n", ret);
 874                 kfree(buf);
 875                 return ret;
 876         }
 877
 878         kfree(buf);
 879
 880         return 0;
 881 }
 882
 883 static int ath6kl_usb_submit_ctrl_in(struct ath6kl_usb *ar_usb,
 884                                   u8 req, u16 value, u16 index, void *data,
 885                                   u32 size)
 886 {
 887         u8 *buf = NULL;
 888         int ret;
 889
 890         if (size > 0) {
 891                 buf = kmalloc(size, GFP_KERNEL);
 892                 if (buf == NULL)
 893                         return -ENOMEM;
 894         }
 895
 896         /* note: if successful returns number of bytes transfered */
 897         ret = usb_control_msg(ar_usb->udev,
 898                                  usb_rcvctrlpipe(ar_usb->udev, 0),
 899                                  req,
 900                                  USB_DIR_IN | USB_TYPE_VENDOR |
 901                                  USB_RECIP_DEVICE, value, index, buf,
 902                                  size, 2 * HZ);
 903
 904         if (ret < 0) {
 905                 ath6kl_warn("Failed to read usb control message: %d\n", ret);
 906                 kfree(buf);
 907                 return ret;
 908         }
 909
 910         memcpy((u8 *) data, buf, size);
 911
 912         kfree(buf);
 913
 914         return 0;
 915 }
 916
 917 static int ath6kl_usb_ctrl_msg_exchange(struct ath6kl_usb *ar_usb,
 918                                      u8 req_val, u8 *req_buf, u32 req_len,
 919                                      u8 resp_val, u8 *resp_buf, u32 *resp_len)
 920 {
 921         int ret;
 922
 923         /* send command */
 924         ret = ath6kl_usb_submit_ctrl_out(ar_usb, req_val, 0, 0,
 925                                          req_buf, req_len);
 926
 927         if (ret != 0)
 928                 return ret;
 929
 930         if (resp_buf == NULL) {
 931                 /* no expected response */
 932                 return ret;
 933         }
 934
 935         /* get response */
 936         ret = ath6kl_usb_submit_ctrl_in(ar_usb, resp_val, 0, 0,
 937                                         resp_buf, *resp_len);
 938
 939         return ret;
 940 }
 941
 942 static int ath6kl_usb_diag_read32(struct ath6kl *ar, u32 address, u32 *data)
 943 {
 944         struct ath6kl_usb *ar_usb = ar->hif_priv;
 945         struct ath6kl_usb_ctrl_diag_resp_read *resp;
 946         struct ath6kl_usb_ctrl_diag_cmd_read *cmd;
 947         u32 resp_len;
 948         int ret;
 949
 950         cmd = (struct ath6kl_usb_ctrl_diag_cmd_read *) ar_usb->diag_cmd_buffer;
 951
 952         memset(cmd, 0, sizeof(*cmd));
 953         cmd->cmd = ATH6KL_USB_CTRL_DIAG_CC_READ;
 954         cmd->address = cpu_to_le32(address);
 955         resp_len = sizeof(*resp);
 956
 957         ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
 958                                 ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
 959                                 (u8 *) cmd,
 960                                 sizeof(struct ath6kl_usb_ctrl_diag_cmd_write),
 961                                 ATH6KL_USB_CONTROL_REQ_DIAG_RESP,
 962                                 ar_usb->diag_resp_buffer, &resp_len);
 963
 964         if (ret) {
 965                 ath6kl_warn("diag read32 failed: %d\n", ret);
 966                 return ret;
 967         }
 968
 969         resp = (struct ath6kl_usb_ctrl_diag_resp_read *)
 970                 ar_usb->diag_resp_buffer;
 971
 972         *data = le32_to_cpu(resp->value);
 973
 974         return ret;
 975 }
 976
 977 static int ath6kl_usb_diag_write32(struct ath6kl *ar, u32 address, __le32 data)
 978 {
 979         struct ath6kl_usb *ar_usb = ar->hif_priv;
 980         struct ath6kl_usb_ctrl_diag_cmd_write *cmd;
 981         int ret;
 982
 983         cmd = (struct ath6kl_usb_ctrl_diag_cmd_write *) ar_usb->diag_cmd_buffer;
 984
 985         memset(cmd, 0, sizeof(struct ath6kl_usb_ctrl_diag_cmd_write));
 986         cmd->cmd = cpu_to_le32(ATH6KL_USB_CTRL_DIAG_CC_WRITE);
 987         cmd->address = cpu_to_le32(address);
 988         cmd->value = data;
 989
 990         ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
 991                                            ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
 992                                            (u8 *) cmd,
 993                                            sizeof(*cmd),
 994                                            0, NULL, NULL);
 995         if (ret) {
 996                 ath6kl_warn("diag_write32 failed: %d\n", ret);
 997                 return ret;
 998         }
 999
1000         return 0;
1001 }
1002
1003 static int ath6kl_usb_bmi_read(struct ath6kl *ar, u8 *buf, u32 len)
1004 {
1005         struct ath6kl_usb *ar_usb = ar->hif_priv;
1006         int ret;
1007
1008         /* get response */
1009         ret = ath6kl_usb_submit_ctrl_in(ar_usb,
1010                                         ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP,
1011                                         0, 0, buf, len);
1012         if (ret) {
1013                 ath6kl_err("Unable to read the bmi data from the device: %d\n",
1014                            ret);
1015                 return ret;
1016         }
1017
1018         return 0;
1019 }
1020
1021 static int ath6kl_usb_bmi_write(struct ath6kl *ar, u8 *buf, u32 len)
1022 {
1023         struct ath6kl_usb *ar_usb = ar->hif_priv;
1024         int ret;
1025
1026         /* send command */
1027         ret = ath6kl_usb_submit_ctrl_out(ar_usb,
1028                                          ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD,
1029                                          0, 0, buf, len);
1030         if (ret) {
1031                 ath6kl_err("unable to send the bmi data to the device: %d\n",
1032                            ret);
1033                 return ret;
1034         }
1035
1036         return 0;
1037 }
1038
1039 static int ath6kl_usb_power_on(struct ath6kl *ar)
1040 {
1041         hif_start(ar);
1042         return 0;
1043 }
1044
1045 static int ath6kl_usb_power_off(struct ath6kl *ar)
1046 {
1047         hif_detach_htc(ar);
1048         return 0;
1049 }
1050
1051 static void ath6kl_usb_stop(struct ath6kl *ar)
1052 {
1053         hif_stop(ar);
1054 }
1055
1056 static void ath6kl_usb_cleanup_scatter(struct ath6kl *ar)
1057 {
1058         /*
1059          * USB doesn't support it. Just return.
1060          */
1061         return;
1062 }
1063
1064 static int ath6kl_usb_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
1065 {
1066         /*
1067          * cfg80211 suspend/WOW currently not supported for USB.
1068          */
1069         return 0;
1070 }
1071
1072 static int ath6kl_usb_resume(struct ath6kl *ar)
1073 {
1074         /*
1075          * cfg80211 resume currently not supported for USB.
1076          */
1077         return 0;
1078 }
1079
1080 static const struct ath6kl_hif_ops ath6kl_usb_ops = {
1081         .diag_read32 = ath6kl_usb_diag_read32,
1082         .diag_write32 = ath6kl_usb_diag_write32,
1083         .bmi_read = ath6kl_usb_bmi_read,
1084         .bmi_write = ath6kl_usb_bmi_write,
1085         .power_on = ath6kl_usb_power_on,
1086         .power_off = ath6kl_usb_power_off,
1087         .stop = ath6kl_usb_stop,
1088         .pipe_send = ath6kl_usb_send,
1089         .pipe_get_default = ath6kl_usb_get_default_pipe,
1090         .pipe_map_service = ath6kl_usb_map_service_pipe,
1091         .pipe_get_free_queue_number = ath6kl_usb_get_free_queue_number,
1092         .cleanup_scatter = ath6kl_usb_cleanup_scatter,
1093         .suspend = ath6kl_usb_suspend,
1094         .resume = ath6kl_usb_resume,
1095 };
1096
1097 /* ath6kl usb driver registered functions */
1098 static int ath6kl_usb_probe(struct usb_interface *interface,
1099                             const struct usb_device_id *id)
1100 {
1101         struct usb_device *dev = interface_to_usbdev(interface);
1102         struct ath6kl *ar;
1103         struct ath6kl_usb *ar_usb = NULL;
1104         int vendor_id, product_id;
1105         int ret = 0;
1106
1107         usb_get_dev(dev);
1108
1109         vendor_id = le16_to_cpu(dev->descriptor.idVendor);
1110         product_id = le16_to_cpu(dev->descriptor.idProduct);
1111
1112         ath6kl_dbg(ATH6KL_DBG_USB, "vendor_id = %04x\n", vendor_id);
1113         ath6kl_dbg(ATH6KL_DBG_USB, "product_id = %04x\n", product_id);
1114
1115         if (interface->cur_altsetting)
1116                 ath6kl_dbg(ATH6KL_DBG_USB, "USB Interface %d\n",
1117                            interface->cur_altsetting->desc.bInterfaceNumber);
1118
1119
1120         if (dev->speed == USB_SPEED_HIGH)
1121                 ath6kl_dbg(ATH6KL_DBG_USB, "USB 2.0 Host\n");
1122         else
1123                 ath6kl_dbg(ATH6KL_DBG_USB, "USB 1.1 Host\n");
1124
1125         ar_usb = ath6kl_usb_create(interface);
1126
1127         if (ar_usb == NULL) {
1128                 ret = -ENOMEM;
1129                 goto err_usb_put;
1130         }
1131
1132         ar = ath6kl_core_create(&ar_usb->udev->dev);
1133         if (ar == NULL) {
1134                 ath6kl_err("Failed to alloc ath6kl core\n");
1135                 ret = -ENOMEM;
1136                 goto err_usb_destroy;
1137         }
1138
1139         ar->hif_priv = ar_usb;
1140         ar->hif_type = ATH6KL_HIF_TYPE_USB;
1141         ar->hif_ops = &ath6kl_usb_ops;
1142         ar->mbox_info.block_size = 16;
1143         ar->bmi.max_data_size = 252;
1144
1145         ar_usb->ar = ar;
1146
1147         ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_PIPE);
1148         if (ret) {
1149                 ath6kl_err("Failed to init ath6kl core: %d\n", ret);
1150                 goto err_core_free;
1151         }
1152
1153         return ret;
1154
1155 err_core_free:
1156         ath6kl_core_destroy(ar);
1157 err_usb_destroy:
1158         ath6kl_usb_destroy(ar_usb);
1159 err_usb_put:
1160         usb_put_dev(dev);
1161
1162         return ret;
1163 }
1164
1165 static void ath6kl_usb_remove(struct usb_interface *interface)
1166 {
1167         usb_put_dev(interface_to_usbdev(interface));
1168         ath6kl_usb_device_detached(interface);
1169 }
1170
1171 #ifdef CONFIG_PM
1172
1173 static int ath6kl_usb_pm_suspend(struct usb_interface *interface,
1174                               pm_message_t message)
1175 {
1176         struct ath6kl_usb *device;
1177         device = usb_get_intfdata(interface);
1178
1179         ath6kl_usb_flush_all(device);
1180         return 0;
1181 }
1182
1183 static int ath6kl_usb_pm_resume(struct usb_interface *interface)
1184 {
1185         struct ath6kl_usb *device;
1186         device = usb_get_intfdata(interface);
1187
1188         ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA],
1189                                        ATH6KL_USB_RX_BUFFER_SIZE);
1190         ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA2],
1191                                        ATH6KL_USB_RX_BUFFER_SIZE);
1192
1193         return 0;
1194 }
1195
1196 static int ath6kl_usb_pm_reset_resume(struct usb_interface *intf)
1197 {
1198         if (usb_get_intfdata(intf))
1199                 ath6kl_usb_remove(intf);
1200         return 0;
1201 }
1202
1203 #else
1204
1205 #define ath6kl_usb_pm_suspend NULL
1206 #define ath6kl_usb_pm_resume NULL
1207 #define ath6kl_usb_pm_reset_resume NULL
1208
1209 #endif
1210
1211 /* table of devices that work with this driver */
1212 static struct usb_device_id ath6kl_usb_ids[] = {
1213         {USB_DEVICE(0x0cf3, 0x9374)},
1214         { /* Terminating entry */ },
1215 };
1216
1217 MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids);
1218
1219 static struct usb_driver ath6kl_usb_driver = {
1220         .name = "ath6kl_usb",
1221         .probe = ath6kl_usb_probe,
1222         .suspend = ath6kl_usb_pm_suspend,
1223         .resume = ath6kl_usb_pm_resume,
1224         .reset_resume = ath6kl_usb_pm_reset_resume,
1225         .disconnect = ath6kl_usb_remove,
1226         .id_table = ath6kl_usb_ids,
1227         .supports_autosuspend = true,
1228         .disable_hub_initiated_lpm = 1,
1229 };
1230
1231 static int ath6kl_usb_init(void)
1232 {
1233         int ret;
1234
1235         ret = usb_register(&ath6kl_usb_driver);
1236         if (ret) {
1237                 ath6kl_err("usb registration failed: %d\n", ret);
1238                 return ret;
1239         }
1240
1241         return 0;
1242 }
1243
1244 static void ath6kl_usb_exit(void)
1245 {
1246         usb_deregister(&ath6kl_usb_driver);
1247 }
1248
1249 module_init(ath6kl_usb_init);
1250 module_exit(ath6kl_usb_exit);
1251
1252 MODULE_AUTHOR("Atheros Communications, Inc.");
1253 MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices");
1254 MODULE_LICENSE("Dual BSD/GPL");
1255 MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE);
1256 MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
1257 MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
1258 MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE);
1259 MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
1260 MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);
1261 MODULE_FIRMWARE(AR6004_HW_1_2_FIRMWARE_FILE);
1262 MODULE_FIRMWARE(AR6004_HW_1_2_BOARD_DATA_FILE);
1263 MODULE_FIRMWARE(AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE);
1264 MODULE_FIRMWARE(AR6004_HW_1_3_FW_DIR "/" AR6004_HW_1_3_FIRMWARE_FILE);
1265 MODULE_FIRMWARE(AR6004_HW_1_3_BOARD_DATA_FILE);
1266 MODULE_FIRMWARE(AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE);