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 static void ath6kl_usb_cleanup_pipe_resources(struct ath6kl_usb *ar_usb)
 242 {
 243         int i;
 244
 245         for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++)
 246                 ath6kl_usb_free_pipe_resources(&ar_usb->pipes[i]);
 247 }
 248
 249 static u8 ath6kl_usb_get_logical_pipe_num(struct ath6kl_usb *ar_usb,
 250                                           u8 ep_address, int *urb_count)
 251 {
 252         u8 pipe_num = ATH6KL_USB_PIPE_INVALID;
 253
 254         switch (ep_address) {
 255         case ATH6KL_USB_EP_ADDR_APP_CTRL_IN:
 256                 pipe_num = ATH6KL_USB_PIPE_RX_CTRL;
 257                 *urb_count = RX_URB_COUNT;
 258                 break;
 259         case ATH6KL_USB_EP_ADDR_APP_DATA_IN:
 260                 pipe_num = ATH6KL_USB_PIPE_RX_DATA;
 261                 *urb_count = RX_URB_COUNT;
 262                 break;
 263         case ATH6KL_USB_EP_ADDR_APP_INT_IN:
 264                 pipe_num = ATH6KL_USB_PIPE_RX_INT;
 265                 *urb_count = RX_URB_COUNT;
 266                 break;
 267         case ATH6KL_USB_EP_ADDR_APP_DATA2_IN:
 268                 pipe_num = ATH6KL_USB_PIPE_RX_DATA2;
 269                 *urb_count = RX_URB_COUNT;
 270                 break;
 271         case ATH6KL_USB_EP_ADDR_APP_CTRL_OUT:
 272                 pipe_num = ATH6KL_USB_PIPE_TX_CTRL;
 273                 *urb_count = TX_URB_COUNT;
 274                 break;
 275         case ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT:
 276                 pipe_num = ATH6KL_USB_PIPE_TX_DATA_LP;
 277                 *urb_count = TX_URB_COUNT;
 278                 break;
 279         case ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT:
 280                 pipe_num = ATH6KL_USB_PIPE_TX_DATA_MP;
 281                 *urb_count = TX_URB_COUNT;
 282                 break;
 283         case ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT:
 284                 pipe_num = ATH6KL_USB_PIPE_TX_DATA_HP;
 285                 *urb_count = TX_URB_COUNT;
 286                 break;
 287         default:
 288                 /* note: there may be endpoints not currently used */
 289                 break;
 290         }
 291
 292         return pipe_num;
 293 }
 294
 295 static int ath6kl_usb_setup_pipe_resources(struct ath6kl_usb *ar_usb)
 296 {
 297         struct usb_interface *interface = ar_usb->interface;
 298         struct usb_host_interface *iface_desc = interface->cur_altsetting;
 299         struct usb_endpoint_descriptor *endpoint;
 300         struct ath6kl_usb_pipe *pipe;
 301         int i, urbcount, status = 0;
 302         u8 pipe_num;
 303
 304         ath6kl_dbg(ATH6KL_DBG_USB, "setting up USB Pipes using interface\n");
 305
 306         /* walk decriptors and setup pipes */
 307         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 308                 endpoint = &iface_desc->endpoint[i].desc;
 309
 310                 if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
 311                         ath6kl_dbg(ATH6KL_DBG_USB,
 312                                    "%s Bulk Ep:0x%2.2X maxpktsz:%d\n",
 313                                    ATH6KL_USB_IS_DIR_IN
 314                                    (endpoint->bEndpointAddress) ?
 315                                    "RX" : "TX", endpoint->bEndpointAddress,
 316                                    le16_to_cpu(endpoint->wMaxPacketSize));
 317                 } else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
 318                         ath6kl_dbg(ATH6KL_DBG_USB,
 319                                    "%s Int Ep:0x%2.2X maxpktsz:%d interval:%d\n",
 320                                    ATH6KL_USB_IS_DIR_IN
 321                                    (endpoint->bEndpointAddress) ?
 322                                    "RX" : "TX", endpoint->bEndpointAddress,
 323                                    le16_to_cpu(endpoint->wMaxPacketSize),
 324                                    endpoint->bInterval);
 325                 } else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
 326                         /* TODO for ISO */
 327                         ath6kl_dbg(ATH6KL_DBG_USB,
 328                                    "%s ISOC Ep:0x%2.2X maxpktsz:%d interval:%d\n",
 329                                    ATH6KL_USB_IS_DIR_IN
 330                                    (endpoint->bEndpointAddress) ?
 331                                    "RX" : "TX", endpoint->bEndpointAddress,
 332                                    le16_to_cpu(endpoint->wMaxPacketSize),
 333                                    endpoint->bInterval);
 334                 }
 335                 urbcount = 0;
 336
 337                 pipe_num =
 338                     ath6kl_usb_get_logical_pipe_num(ar_usb,
 339                                                     endpoint->bEndpointAddress,
 340                                                     &urbcount);
 341                 if (pipe_num == ATH6KL_USB_PIPE_INVALID)
 342                         continue;
 343
 344                 pipe = &ar_usb->pipes[pipe_num];
 345                 if (pipe->ar_usb != NULL) {
 346                         /* hmmm..pipe was already setup */
 347                         continue;
 348                 }
 349
 350                 pipe->ar_usb = ar_usb;
 351                 pipe->logical_pipe_num = pipe_num;
 352                 pipe->ep_address = endpoint->bEndpointAddress;
 353                 pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize);
 354
 355                 if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) {
 356                         if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
 357                                 pipe->usb_pipe_handle =
 358                                     usb_rcvbulkpipe(ar_usb->udev,
 359                                                     pipe->ep_address);
 360                         } else {
 361                                 pipe->usb_pipe_handle =
 362                                     usb_sndbulkpipe(ar_usb->udev,
 363                                                     pipe->ep_address);
 364                         }
 365                 } else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) {
 366                         if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
 367                                 pipe->usb_pipe_handle =
 368                                     usb_rcvintpipe(ar_usb->udev,
 369                                                    pipe->ep_address);
 370                         } else {
 371                                 pipe->usb_pipe_handle =
 372                                     usb_sndintpipe(ar_usb->udev,
 373                                                    pipe->ep_address);
 374                         }
 375                 } else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
 376                         /* TODO for ISO */
 377                         if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) {
 378                                 pipe->usb_pipe_handle =
 379                                     usb_rcvisocpipe(ar_usb->udev,
 380                                                     pipe->ep_address);
 381                         } else {
 382                                 pipe->usb_pipe_handle =
 383                                     usb_sndisocpipe(ar_usb->udev,
 384                                                     pipe->ep_address);
 385                         }
 386                 }
 387
 388                 pipe->ep_desc = endpoint;
 389
 390                 if (!ATH6KL_USB_IS_DIR_IN(pipe->ep_address))
 391                         pipe->flags |= ATH6KL_USB_PIPE_FLAG_TX;
 392
 393                 status = ath6kl_usb_alloc_pipe_resources(pipe, urbcount);
 394                 if (status != 0)
 395                         break;
 396         }
 397
 398         return status;
 399 }
 400
 401 /* pipe operations */
 402 static void ath6kl_usb_post_recv_transfers(struct ath6kl_usb_pipe *recv_pipe,
 403                                            int buffer_length)
 404 {
 405         struct ath6kl_urb_context *urb_context;
 406         struct urb *urb;
 407         int usb_status;
 408
 409         while (true) {
 410                 urb_context = ath6kl_usb_alloc_urb_from_pipe(recv_pipe);
 411                 if (urb_context == NULL)
 412                         break;
 413
 414                 urb_context->skb = dev_alloc_skb(buffer_length);
 415                 if (urb_context->skb == NULL)
 416                         goto err_cleanup_urb;
 417
 418                 urb = usb_alloc_urb(0, GFP_ATOMIC);
 419                 if (urb == NULL)
 420                         goto err_cleanup_urb;
 421
 422                 usb_fill_bulk_urb(urb,
 423                                   recv_pipe->ar_usb->udev,
 424                                   recv_pipe->usb_pipe_handle,
 425                                   urb_context->skb->data,
 426                                   buffer_length,
 427                                   ath6kl_usb_recv_complete, urb_context);
 428
 429                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 430                            "ath6kl usb: bulk recv submit:%d, 0x%X (ep:0x%2.2X), %d bytes buf:0x%p\n",
 431                            recv_pipe->logical_pipe_num,
 432                            recv_pipe->usb_pipe_handle, recv_pipe->ep_address,
 433                            buffer_length, urb_context->skb);
 434
 435                 usb_anchor_urb(urb, &recv_pipe->urb_submitted);
 436                 usb_status = usb_submit_urb(urb, GFP_ATOMIC);
 437
 438                 if (usb_status) {
 439                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 440                                    "ath6kl usb : usb bulk recv failed %d\n",
 441                                    usb_status);
 442                         usb_unanchor_urb(urb);
 443                         usb_free_urb(urb);
 444                         goto err_cleanup_urb;
 445                 }
 446                 usb_free_urb(urb);
 447         }
 448         return;
 449
 450 err_cleanup_urb:
 451         ath6kl_usb_cleanup_recv_urb(urb_context);
 452         return;
 453 }
 454
 455 static void ath6kl_usb_flush_all(struct ath6kl_usb *ar_usb)
 456 {
 457         int i;
 458
 459         for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
 460                 if (ar_usb->pipes[i].ar_usb != NULL)
 461                         usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted);
 462         }
 463
 464         /*
 465          * Flushing any pending I/O may schedule work this call will block
 466          * until all scheduled work runs to completion.
 467          */
 468         flush_scheduled_work();
 469 }
 470
 471 static void ath6kl_usb_start_recv_pipes(struct ath6kl_usb *ar_usb)
 472 {
 473         /*
 474          * note: control pipe is no longer used
 475          * ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_cnt_thresh =
 476          *      ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_alloc/2;
 477          * ath6kl_usb_post_recv_transfers(&ar_usb->
 478          *              pipes[ATH6KL_USB_PIPE_RX_CTRL],
 479          *              ATH6KL_USB_RX_BUFFER_SIZE);
 480          */
 481
 482         ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh = 1;
 483
 484         ath6kl_usb_post_recv_transfers(&ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA],
 485                                        ATH6KL_USB_RX_BUFFER_SIZE);
 486 }
 487
 488 /* hif usb rx/tx completion functions */
 489 static void ath6kl_usb_recv_complete(struct urb *urb)
 490 {
 491         struct ath6kl_urb_context *urb_context = urb->context;
 492         struct ath6kl_usb_pipe *pipe = urb_context->pipe;
 493         struct sk_buff *skb = NULL;
 494         int status = 0;
 495
 496         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 497                    "%s: recv pipe: %d, stat:%d, len:%d urb:0x%p\n", __func__,
 498                    pipe->logical_pipe_num, urb->status, urb->actual_length,
 499                    urb);
 500
 501         if (urb->status != 0) {
 502                 status = -EIO;
 503                 switch (urb->status) {
 504                 case -ECONNRESET:
 505                 case -ENOENT:
 506                 case -ESHUTDOWN:
 507                         /*
 508                          * no need to spew these errors when device
 509                          * removed or urb killed due to driver shutdown
 510                          */
 511                         status = -ECANCELED;
 512                         break;
 513                 default:
 514                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 515                                    "%s recv pipe: %d (ep:0x%2.2X), failed:%d\n",
 516                                    __func__, pipe->logical_pipe_num,
 517                                    pipe->ep_address, urb->status);
 518                         break;
 519                 }
 520                 goto cleanup_recv_urb;
 521         }
 522
 523         if (urb->actual_length == 0)
 524                 goto cleanup_recv_urb;
 525
 526         skb = urb_context->skb;
 527
 528         /* we are going to pass it up */
 529         urb_context->skb = NULL;
 530         skb_put(skb, urb->actual_length);
 531
 532         /* note: queue implements a lock */
 533         skb_queue_tail(&pipe->io_comp_queue, skb);
 534         schedule_work(&pipe->io_complete_work);
 535
 536 cleanup_recv_urb:
 537         ath6kl_usb_cleanup_recv_urb(urb_context);
 538
 539         if (status == 0 &&
 540             pipe->urb_cnt >= pipe->urb_cnt_thresh) {
 541                 /* our free urbs are piling up, post more transfers */
 542                 ath6kl_usb_post_recv_transfers(pipe, ATH6KL_USB_RX_BUFFER_SIZE);
 543         }
 544 }
 545
 546 static void ath6kl_usb_usb_transmit_complete(struct urb *urb)
 547 {
 548         struct ath6kl_urb_context *urb_context = urb->context;
 549         struct ath6kl_usb_pipe *pipe = urb_context->pipe;
 550         struct sk_buff *skb;
 551
 552         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 553                    "%s: pipe: %d, stat:%d, len:%d\n",
 554                    __func__, pipe->logical_pipe_num, urb->status,
 555                    urb->actual_length);
 556
 557         if (urb->status != 0) {
 558                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 559                            "%s:  pipe: %d, failed:%d\n",
 560                            __func__, pipe->logical_pipe_num, urb->status);
 561         }
 562
 563         skb = urb_context->skb;
 564         urb_context->skb = NULL;
 565         ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
 566
 567         /* note: queue implements a lock */
 568         skb_queue_tail(&pipe->io_comp_queue, skb);
 569         schedule_work(&pipe->io_complete_work);
 570 }
 571
 572 static void ath6kl_usb_io_comp_work(struct work_struct *work)
 573 {
 574         struct ath6kl_usb_pipe *pipe = container_of(work,
 575                                                     struct ath6kl_usb_pipe,
 576                                                     io_complete_work);
 577         struct ath6kl_usb *ar_usb;
 578         struct sk_buff *skb;
 579
 580         ar_usb = pipe->ar_usb;
 581
 582         while ((skb = skb_dequeue(&pipe->io_comp_queue))) {
 583                 if (pipe->flags & ATH6KL_USB_PIPE_FLAG_TX) {
 584                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 585                                    "ath6kl usb xmit callback buf:0x%p\n", skb);
 586                         ath6kl_core_tx_complete(ar_usb->ar, skb);
 587                 } else {
 588                         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 589                                    "ath6kl usb recv callback buf:0x%p\n", skb);
 590                         ath6kl_core_rx_complete(ar_usb->ar, skb,
 591                                                 pipe->logical_pipe_num);
 592                 }
 593         }
 594 }
 595
 596 #define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write))
 597 #define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read))
 598
 599 static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb)
 600 {
 601         ath6kl_usb_flush_all(ar_usb);
 602
 603         ath6kl_usb_cleanup_pipe_resources(ar_usb);
 604
 605         usb_set_intfdata(ar_usb->interface, NULL);
 606
 607         kfree(ar_usb->diag_cmd_buffer);
 608         kfree(ar_usb->diag_resp_buffer);
 609
 610         kfree(ar_usb);
 611 }
 612
 613 static struct ath6kl_usb *ath6kl_usb_create(struct usb_interface *interface)
 614 {
 615         struct usb_device *dev = interface_to_usbdev(interface);
 616         struct ath6kl_usb *ar_usb;
 617         struct ath6kl_usb_pipe *pipe;
 618         int status = 0;
 619         int i;
 620
 621         ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL);
 622         if (ar_usb == NULL)
 623                 goto fail_ath6kl_usb_create;
 624
 625         usb_set_intfdata(interface, ar_usb);
 626         spin_lock_init(&(ar_usb->cs_lock));
 627         ar_usb->udev = dev;
 628         ar_usb->interface = interface;
 629
 630         for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) {
 631                 pipe = &ar_usb->pipes[i];
 632                 INIT_WORK(&pipe->io_complete_work,
 633                           ath6kl_usb_io_comp_work);
 634                 skb_queue_head_init(&pipe->io_comp_queue);
 635         }
 636
 637         ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL);
 638         if (ar_usb->diag_cmd_buffer == NULL) {
 639                 status = -ENOMEM;
 640                 goto fail_ath6kl_usb_create;
 641         }
 642
 643         ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP,
 644                                            GFP_KERNEL);
 645         if (ar_usb->diag_resp_buffer == NULL) {
 646                 status = -ENOMEM;
 647                 goto fail_ath6kl_usb_create;
 648         }
 649
 650         status = ath6kl_usb_setup_pipe_resources(ar_usb);
 651
 652 fail_ath6kl_usb_create:
 653         if (status != 0) {
 654                 ath6kl_usb_destroy(ar_usb);
 655                 ar_usb = NULL;
 656         }
 657         return ar_usb;
 658 }
 659
 660 static void ath6kl_usb_device_detached(struct usb_interface *interface)
 661 {
 662         struct ath6kl_usb *ar_usb;
 663
 664         ar_usb = usb_get_intfdata(interface);
 665         if (ar_usb == NULL)
 666                 return;
 667
 668         ath6kl_stop_txrx(ar_usb->ar);
 669
 670         /* Delay to wait for the target to reboot */
 671         mdelay(20);
 672         ath6kl_core_cleanup(ar_usb->ar);
 673         ath6kl_usb_destroy(ar_usb);
 674 }
 675
 676 /* exported hif usb APIs for htc pipe */
 677 static void hif_start(struct ath6kl *ar)
 678 {
 679         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 680         int i;
 681
 682         ath6kl_usb_start_recv_pipes(device);
 683
 684         /* set the TX resource avail threshold for each TX pipe */
 685         for (i = ATH6KL_USB_PIPE_TX_CTRL;
 686              i <= ATH6KL_USB_PIPE_TX_DATA_HP; i++) {
 687                 device->pipes[i].urb_cnt_thresh =
 688                     device->pipes[i].urb_alloc / 2;
 689         }
 690 }
 691
 692 static int ath6kl_usb_send(struct ath6kl *ar, u8 PipeID,
 693                            struct sk_buff *hdr_skb, struct sk_buff *skb)
 694 {
 695         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 696         struct ath6kl_usb_pipe *pipe = &device->pipes[PipeID];
 697         struct ath6kl_urb_context *urb_context;
 698         int usb_status, status = 0;
 699         struct urb *urb;
 700         u8 *data;
 701         u32 len;
 702
 703         ath6kl_dbg(ATH6KL_DBG_USB_BULK, "+%s pipe : %d, buf:0x%p\n",
 704                    __func__, PipeID, skb);
 705
 706         urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe);
 707
 708         if (urb_context == NULL) {
 709                 /*
 710                  * TODO: it is possible to run out of urbs if
 711                  * 2 endpoints map to the same pipe ID
 712                  */
 713                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 714                            "%s pipe:%d no urbs left. URB Cnt : %d\n",
 715                            __func__, PipeID, pipe->urb_cnt);
 716                 status = -ENOMEM;
 717                 goto fail_hif_send;
 718         }
 719
 720         urb_context->skb = skb;
 721
 722         data = skb->data;
 723         len = skb->len;
 724
 725         urb = usb_alloc_urb(0, GFP_ATOMIC);
 726         if (urb == NULL) {
 727                 status = -ENOMEM;
 728                 ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
 729                                             urb_context);
 730                 goto fail_hif_send;
 731         }
 732
 733         usb_fill_bulk_urb(urb,
 734                           device->udev,
 735                           pipe->usb_pipe_handle,
 736                           data,
 737                           len,
 738                           ath6kl_usb_usb_transmit_complete, urb_context);
 739
 740         if ((len % pipe->max_packet_size) == 0) {
 741                 /* hit a max packet boundary on this pipe */
 742                 urb->transfer_flags |= URB_ZERO_PACKET;
 743         }
 744
 745         ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 746                    "athusb bulk send submit:%d, 0x%X (ep:0x%2.2X), %d bytes\n",
 747                    pipe->logical_pipe_num, pipe->usb_pipe_handle,
 748                    pipe->ep_address, len);
 749
 750         usb_anchor_urb(urb, &pipe->urb_submitted);
 751         usb_status = usb_submit_urb(urb, GFP_ATOMIC);
 752
 753         if (usb_status) {
 754                 ath6kl_dbg(ATH6KL_DBG_USB_BULK,
 755                            "ath6kl usb : usb bulk transmit failed %d\n",
 756                            usb_status);
 757                 usb_unanchor_urb(urb);
 758                 ath6kl_usb_free_urb_to_pipe(urb_context->pipe,
 759                                             urb_context);
 760                 status = -EINVAL;
 761         }
 762         usb_free_urb(urb);
 763
 764 fail_hif_send:
 765         return status;
 766 }
 767
 768 static void hif_stop(struct ath6kl *ar)
 769 {
 770         struct ath6kl_usb *device = ath6kl_usb_priv(ar);
 771
 772         ath6kl_usb_flush_all(device);
 773 }
 774
 775 static void ath6kl_usb_get_default_pipe(struct ath6kl *ar,
 776                                         u8 *ul_pipe, u8 *dl_pipe)
 777 {
 778         *ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
 779         *dl_pipe = ATH6KL_USB_PIPE_RX_CTRL;
 780 }
 781
 782 static int ath6kl_usb_map_service_pipe(struct ath6kl *ar, u16 svc_id,
 783                                        u8 *ul_pipe, u8 *dl_pipe)
 784 {
 785         int status = 0;
 786
 787         switch (svc_id) {
 788         case HTC_CTRL_RSVD_SVC:
 789         case WMI_CONTROL_SVC:
 790                 *ul_pipe = ATH6KL_USB_PIPE_TX_CTRL;
 791                 /* due to large control packets, shift to data pipe */
 792                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 793                 break;
 794         case WMI_DATA_BE_SVC:
 795         case WMI_DATA_BK_SVC:
 796                 *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
 797                 /*
 798                 * Disable rxdata2 directly, it will be enabled
 799                 * if FW enable rxdata2
 800                 */
 801                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 802                 break;
 803         case WMI_DATA_VI_SVC:
 804
 805                 if (test_bit(ATH6KL_FW_CAPABILITY_MAP_LP_ENDPOINT,
 806                              ar->fw_capabilities))
 807                         *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP;
 808                 else
 809                         *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP;
 810                 /*
 811                 * Disable rxdata2 directly, it will be enabled
 812                 * if FW enable rxdata2
 813                 */
 814                 *dl_pipe = ATH6KL_USB_PIPE_RX_DATA;
 815                 break;
 816         case WMI_DATA_VO_SVC:
 817
 818                 if (test_bit(ATH6KL_FW_CAPABILITY_MAP_LP_ENDPOINT,
 819                              ar->fw_capabilities))
 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 #else
1197
1198 #define ath6kl_usb_pm_suspend NULL
1199 #define ath6kl_usb_pm_resume NULL
1200
1201 #endif
1202
1203 /* table of devices that work with this driver */
1204 static struct usb_device_id ath6kl_usb_ids[] = {
1205         {USB_DEVICE(0x0cf3, 0x9375)},
1206         {USB_DEVICE(0x0cf3, 0x9374)},
1207         { /* Terminating entry */ },
1208 };
1209
1210 MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids);
1211
1212 static struct usb_driver ath6kl_usb_driver = {
1213         .name = "ath6kl_usb",
1214         .probe = ath6kl_usb_probe,
1215         .suspend = ath6kl_usb_pm_suspend,
1216         .resume = ath6kl_usb_pm_resume,
1217         .disconnect = ath6kl_usb_remove,
1218         .id_table = ath6kl_usb_ids,
1219         .supports_autosuspend = true,
1220         .disable_hub_initiated_lpm = 1,
1221 };
1222
1223 module_usb_driver(ath6kl_usb_driver);
1224
1225 MODULE_AUTHOR("Atheros Communications, Inc.");
1226 MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices");
1227 MODULE_LICENSE("Dual BSD/GPL");
1228 MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE);
1229 MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
1230 MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
1231 MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE);
1232 MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
1233 MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);
1234 MODULE_FIRMWARE(AR6004_HW_1_2_FIRMWARE_FILE);
1235 MODULE_FIRMWARE(AR6004_HW_1_2_BOARD_DATA_FILE);
1236 MODULE_FIRMWARE(AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE);
1237 MODULE_FIRMWARE(AR6004_HW_1_3_FW_DIR "/" AR6004_HW_1_3_FIRMWARE_FILE);
1238 MODULE_FIRMWARE(AR6004_HW_1_3_BOARD_DATA_FILE);
1239 MODULE_FIRMWARE(AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE);