drivers/staging/wlan-ng/hfa384x_usb.c

   1 /* src/prism2/driver/hfa384x_usb.c
   2 *
   3 * Functions that talk to the USB variantof the Intersil hfa384x MAC
   4 *
   5 * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
   6 * --------------------------------------------------------------------
   7 *
   8 * linux-wlan
   9 *
  10 *   The contents of this file are subject to the Mozilla Public
  11 *   License Version 1.1 (the "License"); you may not use this file
  12 *   except in compliance with the License. You may obtain a copy of
  13 *   the License at http://www.mozilla.org/MPL/
  14 *
  15 *   Software distributed under the License is distributed on an "AS
  16 *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  17 *   implied. See the License for the specific language governing
  18 *   rights and limitations under the License.
  19 *
  20 *   Alternatively, the contents of this file may be used under the
  21 *   terms of the GNU Public License version 2 (the "GPL"), in which
  22 *   case the provisions of the GPL are applicable instead of the
  23 *   above.  If you wish to allow the use of your version of this file
  24 *   only under the terms of the GPL and not to allow others to use
  25 *   your version of this file under the MPL, indicate your decision
  26 *   by deleting the provisions above and replace them with the notice
  27 *   and other provisions required by the GPL.  If you do not delete
  28 *   the provisions above, a recipient may use your version of this
  29 *   file under either the MPL or the GPL.
  30 *
  31 * --------------------------------------------------------------------
  32 *
  33 * Inquiries regarding the linux-wlan Open Source project can be
  34 * made directly to:
  35 *
  36 * AbsoluteValue Systems Inc.
  37 * info@linux-wlan.com
  38 * http://www.linux-wlan.com
  39 *
  40 * --------------------------------------------------------------------
  41 *
  42 * Portions of the development of this software were funded by
  43 * Intersil Corporation as part of PRISM(R) chipset product development.
  44 *
  45 * --------------------------------------------------------------------
  46 *
  47 * This file implements functions that correspond to the prism2/hfa384x
  48 * 802.11 MAC hardware and firmware host interface.
  49 *
  50 * The functions can be considered to represent several levels of
  51 * abstraction.  The lowest level functions are simply C-callable wrappers
  52 * around the register accesses.  The next higher level represents C-callable
  53 * prism2 API functions that match the Intersil documentation as closely
  54 * as is reasonable.  The next higher layer implements common sequences
  55 * of invocations of the API layer (e.g. write to bap, followed by cmd).
  56 *
  57 * Common sequences:
  58 * hfa384x_drvr_xxx      Highest level abstractions provided by the
  59 *                       hfa384x code.  They are driver defined wrappers
  60 *                       for common sequences.  These functions generally
  61 *                       use the services of the lower levels.
  62 *
  63 * hfa384x_drvr_xxxconfig  An example of the drvr level abstraction. These
  64 *                       functions are wrappers for the RID get/set
  65 *                       sequence. They call copy_[to|from]_bap() and
  66 *                       cmd_access(). These functions operate on the
  67 *                       RIDs and buffers without validation. The caller
  68 *                       is responsible for that.
  69 *
  70 * API wrapper functions:
  71 * hfa384x_cmd_xxx       functions that provide access to the f/w commands.
  72 *                       The function arguments correspond to each command
  73 *                       argument, even command arguments that get packed
  74 *                       into single registers.  These functions _just_
  75 *                       issue the command by setting the cmd/parm regs
  76 *                       & reading the status/resp regs.  Additional
  77 *                       activities required to fully use a command
  78 *                       (read/write from/to bap, get/set int status etc.)
  79 *                       are implemented separately.  Think of these as
  80 *                       C-callable prism2 commands.
  81 *
  82 * Lowest Layer Functions:
  83 * hfa384x_docmd_xxx     These functions implement the sequence required
  84 *                       to issue any prism2 command.  Primarily used by the
  85 *                       hfa384x_cmd_xxx functions.
  86 *
  87 * hfa384x_bap_xxx       BAP read/write access functions.
  88 *                       Note: we usually use BAP0 for non-interrupt context
  89 *                        and BAP1 for interrupt context.
  90 *
  91 * hfa384x_dl_xxx        download related functions.
  92 *
  93 * Driver State Issues:
  94 * Note that there are two pairs of functions that manage the
  95 * 'initialized' and 'running' states of the hw/MAC combo.  The four
  96 * functions are create(), destroy(), start(), and stop().  create()
  97 * sets up the data structures required to support the hfa384x_*
  98 * functions and destroy() cleans them up.  The start() function gets
  99 * the actual hardware running and enables the interrupts.  The stop()
 100 * function shuts the hardware down.  The sequence should be:
 101 * create()
 102 * start()
 103 *  .
 104 *  .  Do interesting things w/ the hardware
 105 *  .
 106 * stop()
 107 * destroy()
 108 *
 109 * Note that destroy() can be called without calling stop() first.
 110 * --------------------------------------------------------------------
 111 */
 112
 113 #include <linux/module.h>
 114 #include <linux/kernel.h>
 115 #include <linux/sched.h>
 116 #include <linux/types.h>
 117 #include <linux/slab.h>
 118 #include <linux/wireless.h>
 119 #include <linux/netdevice.h>
 120 #include <linux/timer.h>
 121 #include <linux/io.h>
 122 #include <linux/delay.h>
 123 #include <asm/byteorder.h>
 124 #include <linux/bitops.h>
 125 #include <linux/list.h>
 126 #include <linux/usb.h>
 127 #include <linux/byteorder/generic.h>
 128
 129 #include "p80211types.h"
 130 #include "p80211hdr.h"
 131 #include "p80211mgmt.h"
 132 #include "p80211conv.h"
 133 #include "p80211msg.h"
 134 #include "p80211netdev.h"
 135 #include "p80211req.h"
 136 #include "p80211metadef.h"
 137 #include "p80211metastruct.h"
 138 #include "hfa384x.h"
 139 #include "prism2mgmt.h"
 140
 141 enum cmd_mode {
 142         DOWAIT = 0,
 143         DOASYNC
 144 };
 145
 146 #define THROTTLE_JIFFIES        (HZ / 8)
 147 #define URB_ASYNC_UNLINK 0
 148 #define USB_QUEUE_BULK 0
 149
 150 #define ROUNDUP64(a) (((a) + 63) & ~63)
 151
 152 #ifdef DEBUG_USB
 153 static void dbprint_urb(struct urb *urb);
 154 #endif
 155
 156 static void
 157 hfa384x_int_rxmonitor(struct wlandevice *wlandev, struct hfa384x_usb_rxfrm *rxfrm);
 158
 159 static void hfa384x_usb_defer(struct work_struct *data);
 160
 161 static int submit_rx_urb(hfa384x_t *hw, gfp_t flags);
 162
 163 static int submit_tx_urb(hfa384x_t *hw, struct urb *tx_urb, gfp_t flags);
 164
 165 /*---------------------------------------------------*/
 166 /* Callbacks */
 167 static void hfa384x_usbout_callback(struct urb *urb);
 168 static void hfa384x_ctlxout_callback(struct urb *urb);
 169 static void hfa384x_usbin_callback(struct urb *urb);
 170
 171 static void
 172 hfa384x_usbin_txcompl(struct wlandevice *wlandev, union hfa384x_usbin *usbin);
 173
 174 static void hfa384x_usbin_rx(struct wlandevice *wlandev, struct sk_buff *skb);
 175
 176 static void hfa384x_usbin_info(struct wlandevice *wlandev, union hfa384x_usbin *usbin);
 177
 178 static void hfa384x_usbin_ctlx(hfa384x_t *hw, union hfa384x_usbin *usbin,
 179                                int urb_status);
 180
 181 /*---------------------------------------------------*/
 182 /* Functions to support the prism2 usb command queue */
 183
 184 static void hfa384x_usbctlxq_run(hfa384x_t *hw);
 185
 186 static void hfa384x_usbctlx_reqtimerfn(unsigned long data);
 187
 188 static void hfa384x_usbctlx_resptimerfn(unsigned long data);
 189
 190 static void hfa384x_usb_throttlefn(unsigned long data);
 191
 192 static void hfa384x_usbctlx_completion_task(unsigned long data);
 193
 194 static void hfa384x_usbctlx_reaper_task(unsigned long data);
 195
 196 static int hfa384x_usbctlx_submit(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx);
 197
 198 static void unlocked_usbctlx_complete(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx);
 199
 200 struct usbctlx_completor {
 201         int (*complete)(struct usbctlx_completor *);
 202 };
 203
 204 static int
 205 hfa384x_usbctlx_complete_sync(hfa384x_t *hw,
 206                               hfa384x_usbctlx_t *ctlx,
 207                               struct usbctlx_completor *completor);
 208
 209 static int
 210 unlocked_usbctlx_cancel_async(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx);
 211
 212 static void hfa384x_cb_status(hfa384x_t *hw, const hfa384x_usbctlx_t *ctlx);
 213
 214 static int
 215 usbctlx_get_status(const struct hfa384x_usb_statusresp *cmdresp,
 216                    hfa384x_cmdresult_t *result);
 217
 218 static void
 219 usbctlx_get_rridresult(const struct hfa384x_usb_rridresp *rridresp,
 220                        hfa384x_rridresult_t *result);
 221
 222 /*---------------------------------------------------*/
 223 /* Low level req/resp CTLX formatters and submitters */
 224 static int
 225 hfa384x_docmd(hfa384x_t *hw,
 226               enum cmd_mode mode,
 227               hfa384x_metacmd_t *cmd,
 228               ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data);
 229
 230 static int
 231 hfa384x_dorrid(hfa384x_t *hw,
 232                enum cmd_mode mode,
 233                u16 rid,
 234                void *riddata,
 235                unsigned int riddatalen,
 236                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data);
 237
 238 static int
 239 hfa384x_dowrid(hfa384x_t *hw,
 240                enum cmd_mode mode,
 241                u16 rid,
 242                void *riddata,
 243                unsigned int riddatalen,
 244                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data);
 245
 246 static int
 247 hfa384x_dormem(hfa384x_t *hw,
 248                enum cmd_mode mode,
 249                u16 page,
 250                u16 offset,
 251                void *data,
 252                unsigned int len,
 253                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data);
 254
 255 static int
 256 hfa384x_dowmem(hfa384x_t *hw,
 257                enum cmd_mode mode,
 258                u16 page,
 259                u16 offset,
 260                void *data,
 261                unsigned int len,
 262                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data);
 263
 264 static int hfa384x_isgood_pdrcode(u16 pdrcode);
 265
 266 static inline const char *ctlxstr(CTLX_STATE s)
 267 {
 268         static const char * const ctlx_str[] = {
 269                 "Initial state",
 270                 "Complete",
 271                 "Request failed",
 272                 "Request pending",
 273                 "Request packet submitted",
 274                 "Request packet completed",
 275                 "Response packet completed"
 276         };
 277
 278         return ctlx_str[s];
 279 };
 280
 281 static inline hfa384x_usbctlx_t *get_active_ctlx(hfa384x_t *hw)
 282 {
 283         return list_entry(hw->ctlxq.active.next, hfa384x_usbctlx_t, list);
 284 }
 285
 286 #ifdef DEBUG_USB
 287 void dbprint_urb(struct urb *urb)
 288 {
 289         pr_debug("urb->pipe=0x%08x\n", urb->pipe);
 290         pr_debug("urb->status=0x%08x\n", urb->status);
 291         pr_debug("urb->transfer_flags=0x%08x\n", urb->transfer_flags);
 292         pr_debug("urb->transfer_buffer=0x%08x\n",
 293                  (unsigned int)urb->transfer_buffer);
 294         pr_debug("urb->transfer_buffer_length=0x%08x\n",
 295                  urb->transfer_buffer_length);
 296         pr_debug("urb->actual_length=0x%08x\n", urb->actual_length);
 297         pr_debug("urb->bandwidth=0x%08x\n", urb->bandwidth);
 298         pr_debug("urb->setup_packet(ctl)=0x%08x\n",
 299                  (unsigned int)urb->setup_packet);
 300         pr_debug("urb->start_frame(iso/irq)=0x%08x\n", urb->start_frame);
 301         pr_debug("urb->interval(irq)=0x%08x\n", urb->interval);
 302         pr_debug("urb->error_count(iso)=0x%08x\n", urb->error_count);
 303         pr_debug("urb->timeout=0x%08x\n", urb->timeout);
 304         pr_debug("urb->context=0x%08x\n", (unsigned int)urb->context);
 305         pr_debug("urb->complete=0x%08x\n", (unsigned int)urb->complete);
 306 }
 307 #endif
 308
 309 /*----------------------------------------------------------------
 310 * submit_rx_urb
 311 *
 312 * Listen for input data on the BULK-IN pipe. If the pipe has
 313 * stalled then schedule it to be reset.
 314 *
 315 * Arguments:
 316 *       hw              device struct
 317 *       memflags        memory allocation flags
 318 *
 319 * Returns:
 320 *       error code from submission
 321 *
 322 * Call context:
 323 *       Any
 324 ----------------------------------------------------------------*/
 325 static int submit_rx_urb(hfa384x_t *hw, gfp_t memflags)
 326 {
 327         struct sk_buff *skb;
 328         int result;
 329
 330         skb = dev_alloc_skb(sizeof(union hfa384x_usbin));
 331         if (!skb) {
 332                 result = -ENOMEM;
 333                 goto done;
 334         }
 335
 336         /* Post the IN urb */
 337         usb_fill_bulk_urb(&hw->rx_urb, hw->usb,
 338                           hw->endp_in,
 339                           skb->data, sizeof(union hfa384x_usbin),
 340                           hfa384x_usbin_callback, hw->wlandev);
 341
 342         hw->rx_urb_skb = skb;
 343
 344         result = -ENOLINK;
 345         if (!hw->wlandev->hwremoved &&
 346             !test_bit(WORK_RX_HALT, &hw->usb_flags)) {
 347                 result = usb_submit_urb(&hw->rx_urb, memflags);
 348
 349                 /* Check whether we need to reset the RX pipe */
 350                 if (result == -EPIPE) {
 351                         netdev_warn(hw->wlandev->netdev,
 352                                     "%s rx pipe stalled: requesting reset\n",
 353                                     hw->wlandev->netdev->name);
 354                         if (!test_and_set_bit(WORK_RX_HALT, &hw->usb_flags))
 355                                 schedule_work(&hw->usb_work);
 356                 }
 357         }
 358
 359         /* Don't leak memory if anything should go wrong */
 360         if (result != 0) {
 361                 dev_kfree_skb(skb);
 362                 hw->rx_urb_skb = NULL;
 363         }
 364
 365 done:
 366         return result;
 367 }
 368
 369 /*----------------------------------------------------------------
 370 * submit_tx_urb
 371 *
 372 * Prepares and submits the URB of transmitted data. If the
 373 * submission fails then it will schedule the output pipe to
 374 * be reset.
 375 *
 376 * Arguments:
 377 *       hw              device struct
 378 *       tx_urb          URB of data for transmission
 379 *       memflags        memory allocation flags
 380 *
 381 * Returns:
 382 *       error code from submission
 383 *
 384 * Call context:
 385 *       Any
 386 ----------------------------------------------------------------*/
 387 static int submit_tx_urb(hfa384x_t *hw, struct urb *tx_urb, gfp_t memflags)
 388 {
 389         struct net_device *netdev = hw->wlandev->netdev;
 390         int result;
 391
 392         result = -ENOLINK;
 393         if (netif_running(netdev)) {
 394                 if (!hw->wlandev->hwremoved &&
 395                     !test_bit(WORK_TX_HALT, &hw->usb_flags)) {
 396                         result = usb_submit_urb(tx_urb, memflags);
 397
 398                         /* Test whether we need to reset the TX pipe */
 399                         if (result == -EPIPE) {
 400                                 netdev_warn(hw->wlandev->netdev,
 401                                             "%s tx pipe stalled: requesting reset\n",
 402                                             netdev->name);
 403                                 set_bit(WORK_TX_HALT, &hw->usb_flags);
 404                                 schedule_work(&hw->usb_work);
 405                         } else if (result == 0) {
 406                                 netif_stop_queue(netdev);
 407                         }
 408                 }
 409         }
 410
 411         return result;
 412 }
 413
 414 /*----------------------------------------------------------------
 415 * hfa394x_usb_defer
 416 *
 417 * There are some things that the USB stack cannot do while
 418 * in interrupt context, so we arrange this function to run
 419 * in process context.
 420 *
 421 * Arguments:
 422 *       hw      device structure
 423 *
 424 * Returns:
 425 *       nothing
 426 *
 427 * Call context:
 428 *       process (by design)
 429 ----------------------------------------------------------------*/
 430 static void hfa384x_usb_defer(struct work_struct *data)
 431 {
 432         hfa384x_t *hw = container_of(data, struct hfa384x, usb_work);
 433         struct net_device *netdev = hw->wlandev->netdev;
 434
 435         /* Don't bother trying to reset anything if the plug
 436          * has been pulled ...
 437          */
 438         if (hw->wlandev->hwremoved)
 439                 return;
 440
 441         /* Reception has stopped: try to reset the input pipe */
 442         if (test_bit(WORK_RX_HALT, &hw->usb_flags)) {
 443                 int ret;
 444
 445                 usb_kill_urb(&hw->rx_urb); /* Cannot be holding spinlock! */
 446
 447                 ret = usb_clear_halt(hw->usb, hw->endp_in);
 448                 if (ret != 0) {
 449                         netdev_err(hw->wlandev->netdev,
 450                                    "Failed to clear rx pipe for %s: err=%d\n",
 451                                    netdev->name, ret);
 452                 } else {
 453                         netdev_info(hw->wlandev->netdev, "%s rx pipe reset complete.\n",
 454                                     netdev->name);
 455                         clear_bit(WORK_RX_HALT, &hw->usb_flags);
 456                         set_bit(WORK_RX_RESUME, &hw->usb_flags);
 457                 }
 458         }
 459
 460         /* Resume receiving data back from the device. */
 461         if (test_bit(WORK_RX_RESUME, &hw->usb_flags)) {
 462                 int ret;
 463
 464                 ret = submit_rx_urb(hw, GFP_KERNEL);
 465                 if (ret != 0) {
 466                         netdev_err(hw->wlandev->netdev,
 467                                    "Failed to resume %s rx pipe.\n",
 468                                    netdev->name);
 469                 } else {
 470                         clear_bit(WORK_RX_RESUME, &hw->usb_flags);
 471                 }
 472         }
 473
 474         /* Transmission has stopped: try to reset the output pipe */
 475         if (test_bit(WORK_TX_HALT, &hw->usb_flags)) {
 476                 int ret;
 477
 478                 usb_kill_urb(&hw->tx_urb);
 479                 ret = usb_clear_halt(hw->usb, hw->endp_out);
 480                 if (ret != 0) {
 481                         netdev_err(hw->wlandev->netdev,
 482                                    "Failed to clear tx pipe for %s: err=%d\n",
 483                                    netdev->name, ret);
 484                 } else {
 485                         netdev_info(hw->wlandev->netdev, "%s tx pipe reset complete.\n",
 486                                     netdev->name);
 487                         clear_bit(WORK_TX_HALT, &hw->usb_flags);
 488                         set_bit(WORK_TX_RESUME, &hw->usb_flags);
 489
 490                         /* Stopping the BULK-OUT pipe also blocked
 491                          * us from sending any more CTLX URBs, so
 492                          * we need to re-run our queue ...
 493                          */
 494                         hfa384x_usbctlxq_run(hw);
 495                 }
 496         }
 497
 498         /* Resume transmitting. */
 499         if (test_and_clear_bit(WORK_TX_RESUME, &hw->usb_flags))
 500                 netif_wake_queue(hw->wlandev->netdev);
 501 }
 502
 503 /*----------------------------------------------------------------
 504 * hfa384x_create
 505 *
 506 * Sets up the hfa384x_t data structure for use.  Note this
 507 * does _not_ initialize the actual hardware, just the data structures
 508 * we use to keep track of its state.
 509 *
 510 * Arguments:
 511 *       hw              device structure
 512 *       irq             device irq number
 513 *       iobase          i/o base address for register access
 514 *       membase         memory base address for register access
 515 *
 516 * Returns:
 517 *       nothing
 518 *
 519 * Side effects:
 520 *
 521 * Call context:
 522 *       process
 523 ----------------------------------------------------------------*/
 524 void hfa384x_create(hfa384x_t *hw, struct usb_device *usb)
 525 {
 526         memset(hw, 0, sizeof(hfa384x_t));
 527         hw->usb = usb;
 528
 529         /* set up the endpoints */
 530         hw->endp_in = usb_rcvbulkpipe(usb, 1);
 531         hw->endp_out = usb_sndbulkpipe(usb, 2);
 532
 533         /* Set up the waitq */
 534         init_waitqueue_head(&hw->cmdq);
 535
 536         /* Initialize the command queue */
 537         spin_lock_init(&hw->ctlxq.lock);
 538         INIT_LIST_HEAD(&hw->ctlxq.pending);
 539         INIT_LIST_HEAD(&hw->ctlxq.active);
 540         INIT_LIST_HEAD(&hw->ctlxq.completing);
 541         INIT_LIST_HEAD(&hw->ctlxq.reapable);
 542
 543         /* Initialize the authentication queue */
 544         skb_queue_head_init(&hw->authq);
 545
 546         tasklet_init(&hw->reaper_bh,
 547                      hfa384x_usbctlx_reaper_task, (unsigned long)hw);
 548         tasklet_init(&hw->completion_bh,
 549                      hfa384x_usbctlx_completion_task, (unsigned long)hw);
 550         INIT_WORK(&hw->link_bh, prism2sta_processing_defer);
 551         INIT_WORK(&hw->usb_work, hfa384x_usb_defer);
 552
 553         setup_timer(&hw->throttle, hfa384x_usb_throttlefn, (unsigned long)hw);
 554
 555         setup_timer(&hw->resptimer, hfa384x_usbctlx_resptimerfn,
 556                     (unsigned long)hw);
 557
 558         setup_timer(&hw->reqtimer, hfa384x_usbctlx_reqtimerfn,
 559                     (unsigned long)hw);
 560
 561         usb_init_urb(&hw->rx_urb);
 562         usb_init_urb(&hw->tx_urb);
 563         usb_init_urb(&hw->ctlx_urb);
 564
 565         hw->link_status = HFA384x_LINK_NOTCONNECTED;
 566         hw->state = HFA384x_STATE_INIT;
 567
 568         INIT_WORK(&hw->commsqual_bh, prism2sta_commsqual_defer);
 569         setup_timer(&hw->commsqual_timer, prism2sta_commsqual_timer,
 570                     (unsigned long)hw);
 571 }
 572
 573 /*----------------------------------------------------------------
 574 * hfa384x_destroy
 575 *
 576 * Partner to hfa384x_create().  This function cleans up the hw
 577 * structure so that it can be freed by the caller using a simple
 578 * kfree.  Currently, this function is just a placeholder.  If, at some
 579 * point in the future, an hw in the 'shutdown' state requires a 'deep'
 580 * kfree, this is where it should be done.  Note that if this function
 581 * is called on a _running_ hw structure, the drvr_stop() function is
 582 * called.
 583 *
 584 * Arguments:
 585 *       hw              device structure
 586 *
 587 * Returns:
 588 *       nothing, this function is not allowed to fail.
 589 *
 590 * Side effects:
 591 *
 592 * Call context:
 593 *       process
 594 ----------------------------------------------------------------*/
 595 void hfa384x_destroy(hfa384x_t *hw)
 596 {
 597         struct sk_buff *skb;
 598
 599         if (hw->state == HFA384x_STATE_RUNNING)
 600                 hfa384x_drvr_stop(hw);
 601         hw->state = HFA384x_STATE_PREINIT;
 602
 603         kfree(hw->scanresults);
 604         hw->scanresults = NULL;
 605
 606         /* Now to clean out the auth queue */
 607         while ((skb = skb_dequeue(&hw->authq)))
 608                 dev_kfree_skb(skb);
 609 }
 610
 611 static hfa384x_usbctlx_t *usbctlx_alloc(void)
 612 {
 613         hfa384x_usbctlx_t *ctlx;
 614
 615         ctlx = kzalloc(sizeof(*ctlx),
 616                        in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
 617         if (ctlx)
 618                 init_completion(&ctlx->done);
 619
 620         return ctlx;
 621 }
 622
 623 static int
 624 usbctlx_get_status(const struct hfa384x_usb_statusresp *cmdresp,
 625                    hfa384x_cmdresult_t *result)
 626 {
 627         result->status = le16_to_cpu(cmdresp->status);
 628         result->resp0 = le16_to_cpu(cmdresp->resp0);
 629         result->resp1 = le16_to_cpu(cmdresp->resp1);
 630         result->resp2 = le16_to_cpu(cmdresp->resp2);
 631
 632         pr_debug("cmdresult:status=0x%04x resp0=0x%04x resp1=0x%04x resp2=0x%04x\n",
 633                  result->status, result->resp0, result->resp1, result->resp2);
 634
 635         return result->status & HFA384x_STATUS_RESULT;
 636 }
 637
 638 static void
 639 usbctlx_get_rridresult(const struct hfa384x_usb_rridresp *rridresp,
 640                        hfa384x_rridresult_t *result)
 641 {
 642         result->rid = le16_to_cpu(rridresp->rid);
 643         result->riddata = rridresp->data;
 644         result->riddata_len = ((le16_to_cpu(rridresp->frmlen) - 1) * 2);
 645 }
 646
 647 /*----------------------------------------------------------------
 648 * Completor object:
 649 * This completor must be passed to hfa384x_usbctlx_complete_sync()
 650 * when processing a CTLX that returns a hfa384x_cmdresult_t structure.
 651 ----------------------------------------------------------------*/
 652 struct usbctlx_cmd_completor {
 653         struct usbctlx_completor head;
 654
 655         const struct hfa384x_usb_statusresp *cmdresp;
 656         hfa384x_cmdresult_t *result;
 657 };
 658
 659 static inline int usbctlx_cmd_completor_fn(struct usbctlx_completor *head)
 660 {
 661         struct usbctlx_cmd_completor *complete;
 662
 663         complete = (struct usbctlx_cmd_completor *)head;
 664         return usbctlx_get_status(complete->cmdresp, complete->result);
 665 }
 666
 667 static inline struct usbctlx_completor *init_cmd_completor(
 668                                                 struct usbctlx_cmd_completor
 669                                                         *completor,
 670                                                 const struct hfa384x_usb_statusresp
 671                                                         *cmdresp,
 672                                                 hfa384x_cmdresult_t *result)
 673 {
 674         completor->head.complete = usbctlx_cmd_completor_fn;
 675         completor->cmdresp = cmdresp;
 676         completor->result = result;
 677         return &(completor->head);
 678 }
 679
 680 /*----------------------------------------------------------------
 681 * Completor object:
 682 * This completor must be passed to hfa384x_usbctlx_complete_sync()
 683 * when processing a CTLX that reads a RID.
 684 ----------------------------------------------------------------*/
 685 struct usbctlx_rrid_completor {
 686         struct usbctlx_completor head;
 687
 688         const struct hfa384x_usb_rridresp *rridresp;
 689         void *riddata;
 690         unsigned int riddatalen;
 691 };
 692
 693 static int usbctlx_rrid_completor_fn(struct usbctlx_completor *head)
 694 {
 695         struct usbctlx_rrid_completor *complete;
 696         hfa384x_rridresult_t rridresult;
 697
 698         complete = (struct usbctlx_rrid_completor *)head;
 699         usbctlx_get_rridresult(complete->rridresp, &rridresult);
 700
 701         /* Validate the length, note body len calculation in bytes */
 702         if (rridresult.riddata_len != complete->riddatalen) {
 703                 pr_warn("RID len mismatch, rid=0x%04x hlen=%d fwlen=%d\n",
 704                         rridresult.rid,
 705                         complete->riddatalen, rridresult.riddata_len);
 706                 return -ENODATA;
 707         }
 708
 709         memcpy(complete->riddata, rridresult.riddata, complete->riddatalen);
 710         return 0;
 711 }
 712
 713 static inline struct usbctlx_completor *init_rrid_completor(
 714                                                 struct usbctlx_rrid_completor
 715                                                         *completor,
 716                                                 const struct hfa384x_usb_rridresp
 717                                                         *rridresp,
 718                                                 void *riddata,
 719                                                 unsigned int riddatalen)
 720 {
 721         completor->head.complete = usbctlx_rrid_completor_fn;
 722         completor->rridresp = rridresp;
 723         completor->riddata = riddata;
 724         completor->riddatalen = riddatalen;
 725         return &(completor->head);
 726 }
 727
 728 /*----------------------------------------------------------------
 729 * Completor object:
 730 * Interprets the results of a synchronous RID-write
 731 ----------------------------------------------------------------*/
 732 #define init_wrid_completor  init_cmd_completor
 733
 734 /*----------------------------------------------------------------
 735 * Completor object:
 736 * Interprets the results of a synchronous memory-write
 737 ----------------------------------------------------------------*/
 738 #define init_wmem_completor  init_cmd_completor
 739
 740 /*----------------------------------------------------------------
 741 * Completor object:
 742 * Interprets the results of a synchronous memory-read
 743 ----------------------------------------------------------------*/
 744 struct usbctlx_rmem_completor {
 745         struct usbctlx_completor head;
 746
 747         const struct hfa384x_usb_rmemresp *rmemresp;
 748         void *data;
 749         unsigned int len;
 750 };
 751
 752 static int usbctlx_rmem_completor_fn(struct usbctlx_completor *head)
 753 {
 754         struct usbctlx_rmem_completor *complete =
 755                 (struct usbctlx_rmem_completor *)head;
 756
 757         pr_debug("rmemresp:len=%d\n", complete->rmemresp->frmlen);
 758         memcpy(complete->data, complete->rmemresp->data, complete->len);
 759         return 0;
 760 }
 761
 762 static inline struct usbctlx_completor *init_rmem_completor(
 763                                                 struct usbctlx_rmem_completor
 764                                                         *completor,
 765                                                 struct hfa384x_usb_rmemresp
 766                                                         *rmemresp,
 767                                                 void *data,
 768                                                 unsigned int len)
 769 {
 770         completor->head.complete = usbctlx_rmem_completor_fn;
 771         completor->rmemresp = rmemresp;
 772         completor->data = data;
 773         completor->len = len;
 774         return &(completor->head);
 775 }
 776
 777 /*----------------------------------------------------------------
 778 * hfa384x_cb_status
 779 *
 780 * Ctlx_complete handler for async CMD type control exchanges.
 781 * mark the hw struct as such.
 782 *
 783 * Note: If the handling is changed here, it should probably be
 784 *       changed in docmd as well.
 785 *
 786 * Arguments:
 787 *       hw              hw struct
 788 *       ctlx            completed CTLX
 789 *
 790 * Returns:
 791 *       nothing
 792 *
 793 * Side effects:
 794 *
 795 * Call context:
 796 *       interrupt
 797 ----------------------------------------------------------------*/
 798 static void hfa384x_cb_status(hfa384x_t *hw, const hfa384x_usbctlx_t *ctlx)
 799 {
 800         if (ctlx->usercb) {
 801                 hfa384x_cmdresult_t cmdresult;
 802
 803                 if (ctlx->state != CTLX_COMPLETE) {
 804                         memset(&cmdresult, 0, sizeof(cmdresult));
 805                         cmdresult.status =
 806                             HFA384x_STATUS_RESULT_SET(HFA384x_CMD_ERR);
 807                 } else {
 808                         usbctlx_get_status(&ctlx->inbuf.cmdresp, &cmdresult);
 809                 }
 810
 811                 ctlx->usercb(hw, &cmdresult, ctlx->usercb_data);
 812         }
 813 }
 814
 815 static inline int hfa384x_docmd_wait(hfa384x_t *hw, hfa384x_metacmd_t *cmd)
 816 {
 817         return hfa384x_docmd(hw, DOWAIT, cmd, NULL, NULL, NULL);
 818 }
 819
 820 static inline int
 821 hfa384x_docmd_async(hfa384x_t *hw,
 822                     hfa384x_metacmd_t *cmd,
 823                     ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data)
 824 {
 825         return hfa384x_docmd(hw, DOASYNC, cmd, cmdcb, usercb, usercb_data);
 826 }
 827
 828 static inline int
 829 hfa384x_dorrid_wait(hfa384x_t *hw, u16 rid, void *riddata,
 830                     unsigned int riddatalen)
 831 {
 832         return hfa384x_dorrid(hw, DOWAIT,
 833                               rid, riddata, riddatalen, NULL, NULL, NULL);
 834 }
 835
 836 static inline int
 837 hfa384x_dorrid_async(hfa384x_t *hw,
 838                      u16 rid, void *riddata, unsigned int riddatalen,
 839                      ctlx_cmdcb_t cmdcb,
 840                      ctlx_usercb_t usercb, void *usercb_data)
 841 {
 842         return hfa384x_dorrid(hw, DOASYNC,
 843                               rid, riddata, riddatalen,
 844                               cmdcb, usercb, usercb_data);
 845 }
 846
 847 static inline int
 848 hfa384x_dowrid_wait(hfa384x_t *hw, u16 rid, void *riddata,
 849                     unsigned int riddatalen)
 850 {
 851         return hfa384x_dowrid(hw, DOWAIT,
 852                               rid, riddata, riddatalen, NULL, NULL, NULL);
 853 }
 854
 855 static inline int
 856 hfa384x_dowrid_async(hfa384x_t *hw,
 857                      u16 rid, void *riddata, unsigned int riddatalen,
 858                      ctlx_cmdcb_t cmdcb,
 859                      ctlx_usercb_t usercb, void *usercb_data)
 860 {
 861         return hfa384x_dowrid(hw, DOASYNC,
 862                               rid, riddata, riddatalen,
 863                               cmdcb, usercb, usercb_data);
 864 }
 865
 866 static inline int
 867 hfa384x_dormem_wait(hfa384x_t *hw,
 868                     u16 page, u16 offset, void *data, unsigned int len)
 869 {
 870         return hfa384x_dormem(hw, DOWAIT,
 871                               page, offset, data, len, NULL, NULL, NULL);
 872 }
 873
 874 static inline int
 875 hfa384x_dormem_async(hfa384x_t *hw,
 876                      u16 page, u16 offset, void *data, unsigned int len,
 877                      ctlx_cmdcb_t cmdcb,
 878                      ctlx_usercb_t usercb, void *usercb_data)
 879 {
 880         return hfa384x_dormem(hw, DOASYNC,
 881                               page, offset, data, len,
 882                               cmdcb, usercb, usercb_data);
 883 }
 884
 885 static inline int
 886 hfa384x_dowmem_wait(hfa384x_t *hw,
 887                     u16 page, u16 offset, void *data, unsigned int len)
 888 {
 889         return hfa384x_dowmem(hw, DOWAIT,
 890                               page, offset, data, len, NULL, NULL, NULL);
 891 }
 892
 893 static inline int
 894 hfa384x_dowmem_async(hfa384x_t *hw,
 895                      u16 page,
 896                      u16 offset,
 897                      void *data,
 898                      unsigned int len,
 899                      ctlx_cmdcb_t cmdcb,
 900                      ctlx_usercb_t usercb, void *usercb_data)
 901 {
 902         return hfa384x_dowmem(hw, DOASYNC,
 903                               page, offset, data, len,
 904                               cmdcb, usercb, usercb_data);
 905 }
 906
 907 /*----------------------------------------------------------------
 908 * hfa384x_cmd_initialize
 909 *
 910 * Issues the initialize command and sets the hw->state based
 911 * on the result.
 912 *
 913 * Arguments:
 914 *       hw              device structure
 915 *
 916 * Returns:
 917 *       0               success
 918 *       >0              f/w reported error - f/w status code
 919 *       <0              driver reported error
 920 *
 921 * Side effects:
 922 *
 923 * Call context:
 924 *       process
 925 ----------------------------------------------------------------*/
 926 int hfa384x_cmd_initialize(hfa384x_t *hw)
 927 {
 928         int result = 0;
 929         int i;
 930         hfa384x_metacmd_t cmd;
 931
 932         cmd.cmd = HFA384x_CMDCODE_INIT;
 933         cmd.parm0 = 0;
 934         cmd.parm1 = 0;
 935         cmd.parm2 = 0;
 936
 937         result = hfa384x_docmd_wait(hw, &cmd);
 938
 939         pr_debug("cmdresp.init: status=0x%04x, resp0=0x%04x, resp1=0x%04x, resp2=0x%04x\n",
 940                  cmd.result.status,
 941                  cmd.result.resp0, cmd.result.resp1, cmd.result.resp2);
 942         if (result == 0) {
 943                 for (i = 0; i < HFA384x_NUMPORTS_MAX; i++)
 944                         hw->port_enabled[i] = 0;
 945         }
 946
 947         hw->link_status = HFA384x_LINK_NOTCONNECTED;
 948
 949         return result;
 950 }
 951
 952 /*----------------------------------------------------------------
 953 * hfa384x_cmd_disable
 954 *
 955 * Issues the disable command to stop communications on one of
 956 * the MACs 'ports'.
 957 *
 958 * Arguments:
 959 *       hw              device structure
 960 *       macport         MAC port number (host order)
 961 *
 962 * Returns:
 963 *       0               success
 964 *       >0              f/w reported failure - f/w status code
 965 *       <0              driver reported error (timeout|bad arg)
 966 *
 967 * Side effects:
 968 *
 969 * Call context:
 970 *       process
 971 ----------------------------------------------------------------*/
 972 int hfa384x_cmd_disable(hfa384x_t *hw, u16 macport)
 973 {
 974         hfa384x_metacmd_t cmd;
 975
 976         cmd.cmd = HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_DISABLE) |
 977             HFA384x_CMD_MACPORT_SET(macport);
 978         cmd.parm0 = 0;
 979         cmd.parm1 = 0;
 980         cmd.parm2 = 0;
 981
 982         return hfa384x_docmd_wait(hw, &cmd);
 983 }
 984
 985 /*----------------------------------------------------------------
 986 * hfa384x_cmd_enable
 987 *
 988 * Issues the enable command to enable communications on one of
 989 * the MACs 'ports'.
 990 *
 991 * Arguments:
 992 *       hw              device structure
 993 *       macport         MAC port number
 994 *
 995 * Returns:
 996 *       0               success
 997 *       >0              f/w reported failure - f/w status code
 998 *       <0              driver reported error (timeout|bad arg)
 999 *
1000 * Side effects:
1001 *
1002 * Call context:
1003 *       process
1004 ----------------------------------------------------------------*/
1005 int hfa384x_cmd_enable(hfa384x_t *hw, u16 macport)
1006 {
1007         hfa384x_metacmd_t cmd;
1008
1009         cmd.cmd = HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_ENABLE) |
1010             HFA384x_CMD_MACPORT_SET(macport);
1011         cmd.parm0 = 0;
1012         cmd.parm1 = 0;
1013         cmd.parm2 = 0;
1014
1015         return hfa384x_docmd_wait(hw, &cmd);
1016 }
1017
1018 /*----------------------------------------------------------------
1019 * hfa384x_cmd_monitor
1020 *
1021 * Enables the 'monitor mode' of the MAC.  Here's the description of
1022 * monitor mode that I've received thus far:
1023 *
1024 *  "The "monitor mode" of operation is that the MAC passes all
1025 *  frames for which the PLCP checks are correct. All received
1026 *  MPDUs are passed to the host with MAC Port = 7, with a
1027 *  receive status of good, FCS error, or undecryptable. Passing
1028 *  certain MPDUs is a violation of the 802.11 standard, but useful
1029 *  for a debugging tool."  Normal communication is not possible
1030 *  while monitor mode is enabled.
1031 *
1032 * Arguments:
1033 *       hw              device structure
1034 *       enable          a code (0x0b|0x0f) that enables/disables
1035 *                       monitor mode. (host order)
1036 *
1037 * Returns:
1038 *       0               success
1039 *       >0              f/w reported failure - f/w status code
1040 *       <0              driver reported error (timeout|bad arg)
1041 *
1042 * Side effects:
1043 *
1044 * Call context:
1045 *       process
1046 ----------------------------------------------------------------*/
1047 int hfa384x_cmd_monitor(hfa384x_t *hw, u16 enable)
1048 {
1049         hfa384x_metacmd_t cmd;
1050
1051         cmd.cmd = HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_MONITOR) |
1052             HFA384x_CMD_AINFO_SET(enable);
1053         cmd.parm0 = 0;
1054         cmd.parm1 = 0;
1055         cmd.parm2 = 0;
1056
1057         return hfa384x_docmd_wait(hw, &cmd);
1058 }
1059
1060 /*----------------------------------------------------------------
1061 * hfa384x_cmd_download
1062 *
1063 * Sets the controls for the MAC controller code/data download
1064 * process.  The arguments set the mode and address associated
1065 * with a download.  Note that the aux registers should be enabled
1066 * prior to setting one of the download enable modes.
1067 *
1068 * Arguments:
1069 *       hw              device structure
1070 *       mode            0 - Disable programming and begin code exec
1071 *                       1 - Enable volatile mem programming
1072 *                       2 - Enable non-volatile mem programming
1073 *                       3 - Program non-volatile section from NV download
1074 *                           buffer.
1075 *                       (host order)
1076 *       lowaddr
1077 *       highaddr        For mode 1, sets the high & low order bits of
1078 *                       the "destination address".  This address will be
1079 *                       the execution start address when download is
1080 *                       subsequently disabled.
1081 *                       For mode 2, sets the high & low order bits of
1082 *                       the destination in NV ram.
1083 *                       For modes 0 & 3, should be zero. (host order)
1084 *                       NOTE: these are CMD format.
1085 *       codelen         Length of the data to write in mode 2,
1086 *                       zero otherwise. (host order)
1087 *
1088 * Returns:
1089 *       0               success
1090 *       >0              f/w reported failure - f/w status code
1091 *       <0              driver reported error (timeout|bad arg)
1092 *
1093 * Side effects:
1094 *
1095 * Call context:
1096 *       process
1097 ----------------------------------------------------------------*/
1098 int hfa384x_cmd_download(hfa384x_t *hw, u16 mode, u16 lowaddr,
1099                          u16 highaddr, u16 codelen)
1100 {
1101         hfa384x_metacmd_t cmd;
1102
1103         pr_debug("mode=%d, lowaddr=0x%04x, highaddr=0x%04x, codelen=%d\n",
1104                  mode, lowaddr, highaddr, codelen);
1105
1106         cmd.cmd = (HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_DOWNLD) |
1107                    HFA384x_CMD_PROGMODE_SET(mode));
1108
1109         cmd.parm0 = lowaddr;
1110         cmd.parm1 = highaddr;
1111         cmd.parm2 = codelen;
1112
1113         return hfa384x_docmd_wait(hw, &cmd);
1114 }
1115
1116 /*----------------------------------------------------------------
1117 * hfa384x_corereset
1118 *
1119 * Perform a reset of the hfa38xx MAC core.  We assume that the hw
1120 * structure is in its "created" state.  That is, it is initialized
1121 * with proper values.  Note that if a reset is done after the
1122 * device has been active for awhile, the caller might have to clean
1123 * up some leftover cruft in the hw structure.
1124 *
1125 * Arguments:
1126 *       hw              device structure
1127 *       holdtime        how long (in ms) to hold the reset
1128 *       settletime      how long (in ms) to wait after releasing
1129 *                       the reset
1130 *
1131 * Returns:
1132 *       nothing
1133 *
1134 * Side effects:
1135 *
1136 * Call context:
1137 *       process
1138 ----------------------------------------------------------------*/
1139 int hfa384x_corereset(hfa384x_t *hw, int holdtime, int settletime, int genesis)
1140 {
1141         int result;
1142
1143         result = usb_reset_device(hw->usb);
1144         if (result < 0) {
1145                 netdev_err(hw->wlandev->netdev, "usb_reset_device() failed, result=%d.\n",
1146                            result);
1147         }
1148
1149         return result;
1150 }
1151
1152 /*----------------------------------------------------------------
1153 * hfa384x_usbctlx_complete_sync
1154 *
1155 * Waits for a synchronous CTLX object to complete,
1156 * and then handles the response.
1157 *
1158 * Arguments:
1159 *       hw              device structure
1160 *       ctlx            CTLX ptr
1161 *       completor       functor object to decide what to
1162 *                       do with the CTLX's result.
1163 *
1164 * Returns:
1165 *       0               Success
1166 *       -ERESTARTSYS    Interrupted by a signal
1167 *       -EIO            CTLX failed
1168 *       -ENODEV         Adapter was unplugged
1169 *       ???             Result from completor
1170 *
1171 * Side effects:
1172 *
1173 * Call context:
1174 *       process
1175 ----------------------------------------------------------------*/
1176 static int hfa384x_usbctlx_complete_sync(hfa384x_t *hw,
1177                                          hfa384x_usbctlx_t *ctlx,
1178                                          struct usbctlx_completor *completor)
1179 {
1180         unsigned long flags;
1181         int result;
1182
1183         result = wait_for_completion_interruptible(&ctlx->done);
1184
1185         spin_lock_irqsave(&hw->ctlxq.lock, flags);
1186
1187         /*
1188          * We can only handle the CTLX if the USB disconnect
1189          * function has not run yet ...
1190          */
1191 cleanup:
1192         if (hw->wlandev->hwremoved) {
1193                 spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
1194                 result = -ENODEV;
1195         } else if (result != 0) {
1196                 int runqueue = 0;
1197
1198                 /*
1199                  * We were probably interrupted, so delete
1200                  * this CTLX asynchronously, kill the timers
1201                  * and the URB, and then start the next
1202                  * pending CTLX.
1203                  *
1204                  * NOTE: We can only delete the timers and
1205                  *       the URB if this CTLX is active.
1206                  */
1207                 if (ctlx == get_active_ctlx(hw)) {
1208                         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
1209
1210                         del_singleshot_timer_sync(&hw->reqtimer);
1211                         del_singleshot_timer_sync(&hw->resptimer);
1212                         hw->req_timer_done = 1;
1213                         hw->resp_timer_done = 1;
1214                         usb_kill_urb(&hw->ctlx_urb);
1215
1216                         spin_lock_irqsave(&hw->ctlxq.lock, flags);
1217
1218                         runqueue = 1;
1219
1220                         /*
1221                          * This scenario is so unlikely that I'm
1222                          * happy with a grubby "goto" solution ...
1223                          */
1224                         if (hw->wlandev->hwremoved)
1225                                 goto cleanup;
1226                 }
1227
1228                 /*
1229                  * The completion task will send this CTLX
1230                  * to the reaper the next time it runs. We
1231                  * are no longer in a hurry.
1232                  */
1233                 ctlx->reapable = 1;
1234                 ctlx->state = CTLX_REQ_FAILED;
1235                 list_move_tail(&ctlx->list, &hw->ctlxq.completing);
1236
1237                 spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
1238
1239                 if (runqueue)
1240                         hfa384x_usbctlxq_run(hw);
1241         } else {
1242                 if (ctlx->state == CTLX_COMPLETE) {
1243                         result = completor->complete(completor);
1244                 } else {
1245                         netdev_warn(hw->wlandev->netdev, "CTLX[%d] error: state(%s)\n",
1246                                     le16_to_cpu(ctlx->outbuf.type),
1247                                     ctlxstr(ctlx->state));
1248                         result = -EIO;
1249                 }
1250
1251                 list_del(&ctlx->list);
1252                 spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
1253                 kfree(ctlx);
1254         }
1255
1256         return result;
1257 }
1258
1259 /*----------------------------------------------------------------
1260 * hfa384x_docmd
1261 *
1262 * Constructs a command CTLX and submits it.
1263 *
1264 * NOTE: Any changes to the 'post-submit' code in this function
1265 *       need to be carried over to hfa384x_cbcmd() since the handling
1266 *       is virtually identical.
1267 *
1268 * Arguments:
1269 *       hw              device structure
1270 *       mode            DOWAIT or DOASYNC
1271 *       cmd             cmd structure.  Includes all arguments and result
1272 *                       data points.  All in host order. in host order
1273 *       cmdcb           command-specific callback
1274 *       usercb          user callback for async calls, NULL for DOWAIT calls
1275 *       usercb_data     user supplied data pointer for async calls, NULL
1276 *                       for DOASYNC calls
1277 *
1278 * Returns:
1279 *       0               success
1280 *       -EIO            CTLX failure
1281 *       -ERESTARTSYS    Awakened on signal
1282 *       >0              command indicated error, Status and Resp0-2 are
1283 *                       in hw structure.
1284 *
1285 * Side effects:
1286 *
1287 *
1288 * Call context:
1289 *       process
1290 ----------------------------------------------------------------*/
1291 static int
1292 hfa384x_docmd(hfa384x_t *hw,
1293               enum cmd_mode mode,
1294               hfa384x_metacmd_t *cmd,
1295               ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data)
1296 {
1297         int result;
1298         hfa384x_usbctlx_t *ctlx;
1299
1300         ctlx = usbctlx_alloc();
1301         if (!ctlx) {
1302                 result = -ENOMEM;
1303                 goto done;
1304         }
1305
1306         /* Initialize the command */
1307         ctlx->outbuf.cmdreq.type = cpu_to_le16(HFA384x_USB_CMDREQ);
1308         ctlx->outbuf.cmdreq.cmd = cpu_to_le16(cmd->cmd);
1309         ctlx->outbuf.cmdreq.parm0 = cpu_to_le16(cmd->parm0);
1310         ctlx->outbuf.cmdreq.parm1 = cpu_to_le16(cmd->parm1);
1311         ctlx->outbuf.cmdreq.parm2 = cpu_to_le16(cmd->parm2);
1312
1313         ctlx->outbufsize = sizeof(ctlx->outbuf.cmdreq);
1314
1315         pr_debug("cmdreq: cmd=0x%04x parm0=0x%04x parm1=0x%04x parm2=0x%04x\n",
1316                  cmd->cmd, cmd->parm0, cmd->parm1, cmd->parm2);
1317
1318         ctlx->reapable = mode;
1319         ctlx->cmdcb = cmdcb;
1320         ctlx->usercb = usercb;
1321         ctlx->usercb_data = usercb_data;
1322
1323         result = hfa384x_usbctlx_submit(hw, ctlx);
1324         if (result != 0) {
1325                 kfree(ctlx);
1326         } else if (mode == DOWAIT) {
1327                 struct usbctlx_cmd_completor completor;
1328
1329                 result =
1330                     hfa384x_usbctlx_complete_sync(hw, ctlx,
1331                                                   init_cmd_completor(&completor,
1332                                                                      &ctlx->
1333                                                                      inbuf.
1334                                                                      cmdresp,
1335                                                                      &cmd->
1336                                                                      result));
1337         }
1338
1339 done:
1340         return result;
1341 }
1342
1343 /*----------------------------------------------------------------
1344 * hfa384x_dorrid
1345 *
1346 * Constructs a read rid CTLX and issues it.
1347 *
1348 * NOTE: Any changes to the 'post-submit' code in this function
1349 *       need to be carried over to hfa384x_cbrrid() since the handling
1350 *       is virtually identical.
1351 *
1352 * Arguments:
1353 *       hw              device structure
1354 *       mode            DOWAIT or DOASYNC
1355 *       rid             Read RID number (host order)
1356 *       riddata         Caller supplied buffer that MAC formatted RID.data
1357 *                       record will be written to for DOWAIT calls. Should
1358 *                       be NULL for DOASYNC calls.
1359 *       riddatalen      Buffer length for DOWAIT calls. Zero for DOASYNC calls.
1360 *       cmdcb           command callback for async calls, NULL for DOWAIT calls
1361 *       usercb          user callback for async calls, NULL for DOWAIT calls
1362 *       usercb_data     user supplied data pointer for async calls, NULL
1363 *                       for DOWAIT calls
1364 *
1365 * Returns:
1366 *       0               success
1367 *       -EIO            CTLX failure
1368 *       -ERESTARTSYS    Awakened on signal
1369 *       -ENODATA        riddatalen != macdatalen
1370 *       >0              command indicated error, Status and Resp0-2 are
1371 *                       in hw structure.
1372 *
1373 * Side effects:
1374 *
1375 * Call context:
1376 *       interrupt (DOASYNC)
1377 *       process (DOWAIT or DOASYNC)
1378 ----------------------------------------------------------------*/
1379 static int
1380 hfa384x_dorrid(hfa384x_t *hw,
1381                enum cmd_mode mode,
1382                u16 rid,
1383                void *riddata,
1384                unsigned int riddatalen,
1385                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data)
1386 {
1387         int result;
1388         hfa384x_usbctlx_t *ctlx;
1389
1390         ctlx = usbctlx_alloc();
1391         if (!ctlx) {
1392                 result = -ENOMEM;
1393                 goto done;
1394         }
1395
1396         /* Initialize the command */
1397         ctlx->outbuf.rridreq.type = cpu_to_le16(HFA384x_USB_RRIDREQ);
1398         ctlx->outbuf.rridreq.frmlen =
1399             cpu_to_le16(sizeof(ctlx->outbuf.rridreq.rid));
1400         ctlx->outbuf.rridreq.rid = cpu_to_le16(rid);
1401
1402         ctlx->outbufsize = sizeof(ctlx->outbuf.rridreq);
1403
1404         ctlx->reapable = mode;
1405         ctlx->cmdcb = cmdcb;
1406         ctlx->usercb = usercb;
1407         ctlx->usercb_data = usercb_data;
1408
1409         /* Submit the CTLX */
1410         result = hfa384x_usbctlx_submit(hw, ctlx);
1411         if (result != 0) {
1412                 kfree(ctlx);
1413         } else if (mode == DOWAIT) {
1414                 struct usbctlx_rrid_completor completor;
1415
1416                 result =
1417                     hfa384x_usbctlx_complete_sync(hw, ctlx,
1418                                                   init_rrid_completor
1419                                                   (&completor,
1420                                                    &ctlx->inbuf.rridresp,
1421                                                    riddata, riddatalen));
1422         }
1423
1424 done:
1425         return result;
1426 }
1427
1428 /*----------------------------------------------------------------
1429 * hfa384x_dowrid
1430 *
1431 * Constructs a write rid CTLX and issues it.
1432 *
1433 * NOTE: Any changes to the 'post-submit' code in this function
1434 *       need to be carried over to hfa384x_cbwrid() since the handling
1435 *       is virtually identical.
1436 *
1437 * Arguments:
1438 *       hw              device structure
1439 *       enum cmd_mode   DOWAIT or DOASYNC
1440 *       rid             RID code
1441 *       riddata         Data portion of RID formatted for MAC
1442 *       riddatalen      Length of the data portion in bytes
1443 *       cmdcb           command callback for async calls, NULL for DOWAIT calls
1444 *       usercb          user callback for async calls, NULL for DOWAIT calls
1445 *       usercb_data     user supplied data pointer for async calls
1446 *
1447 * Returns:
1448 *       0               success
1449 *       -ETIMEDOUT      timed out waiting for register ready or
1450 *                       command completion
1451 *       >0              command indicated error, Status and Resp0-2 are
1452 *                       in hw structure.
1453 *
1454 * Side effects:
1455 *
1456 * Call context:
1457 *       interrupt (DOASYNC)
1458 *       process (DOWAIT or DOASYNC)
1459 ----------------------------------------------------------------*/
1460 static int
1461 hfa384x_dowrid(hfa384x_t *hw,
1462                enum cmd_mode mode,
1463                u16 rid,
1464                void *riddata,
1465                unsigned int riddatalen,
1466                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data)
1467 {
1468         int result;
1469         hfa384x_usbctlx_t *ctlx;
1470
1471         ctlx = usbctlx_alloc();
1472         if (!ctlx) {
1473                 result = -ENOMEM;
1474                 goto done;
1475         }
1476
1477         /* Initialize the command */
1478         ctlx->outbuf.wridreq.type = cpu_to_le16(HFA384x_USB_WRIDREQ);
1479         ctlx->outbuf.wridreq.frmlen = cpu_to_le16((sizeof
1480                                                    (ctlx->outbuf.wridreq.rid) +
1481                                                    riddatalen + 1) / 2);
1482         ctlx->outbuf.wridreq.rid = cpu_to_le16(rid);
1483         memcpy(ctlx->outbuf.wridreq.data, riddata, riddatalen);
1484
1485         ctlx->outbufsize = sizeof(ctlx->outbuf.wridreq.type) +
1486             sizeof(ctlx->outbuf.wridreq.frmlen) +
1487             sizeof(ctlx->outbuf.wridreq.rid) + riddatalen;
1488
1489         ctlx->reapable = mode;
1490         ctlx->cmdcb = cmdcb;
1491         ctlx->usercb = usercb;
1492         ctlx->usercb_data = usercb_data;
1493
1494         /* Submit the CTLX */
1495         result = hfa384x_usbctlx_submit(hw, ctlx);
1496         if (result != 0) {
1497                 kfree(ctlx);
1498         } else if (mode == DOWAIT) {
1499                 struct usbctlx_cmd_completor completor;
1500                 hfa384x_cmdresult_t wridresult;
1501
1502                 result = hfa384x_usbctlx_complete_sync(hw,
1503                                                        ctlx,
1504                                                        init_wrid_completor
1505                                                        (&completor,
1506                                                         &ctlx->inbuf.wridresp,
1507                                                         &wridresult));
1508         }
1509
1510 done:
1511         return result;
1512 }
1513
1514 /*----------------------------------------------------------------
1515 * hfa384x_dormem
1516 *
1517 * Constructs a readmem CTLX and issues it.
1518 *
1519 * NOTE: Any changes to the 'post-submit' code in this function
1520 *       need to be carried over to hfa384x_cbrmem() since the handling
1521 *       is virtually identical.
1522 *
1523 * Arguments:
1524 *       hw              device structure
1525 *       mode            DOWAIT or DOASYNC
1526 *       page            MAC address space page (CMD format)
1527 *       offset          MAC address space offset
1528 *       data            Ptr to data buffer to receive read
1529 *       len             Length of the data to read (max == 2048)
1530 *       cmdcb           command callback for async calls, NULL for DOWAIT calls
1531 *       usercb          user callback for async calls, NULL for DOWAIT calls
1532 *       usercb_data     user supplied data pointer for async calls
1533 *
1534 * Returns:
1535 *       0               success
1536 *       -ETIMEDOUT      timed out waiting for register ready or
1537 *                       command completion
1538 *       >0              command indicated error, Status and Resp0-2 are
1539 *                       in hw structure.
1540 *
1541 * Side effects:
1542 *
1543 * Call context:
1544 *       interrupt (DOASYNC)
1545 *       process (DOWAIT or DOASYNC)
1546 ----------------------------------------------------------------*/
1547 static int
1548 hfa384x_dormem(hfa384x_t *hw,
1549                enum cmd_mode mode,
1550                u16 page,
1551                u16 offset,
1552                void *data,
1553                unsigned int len,
1554                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data)
1555 {
1556         int result;
1557         hfa384x_usbctlx_t *ctlx;
1558
1559         ctlx = usbctlx_alloc();
1560         if (!ctlx) {
1561                 result = -ENOMEM;
1562                 goto done;
1563         }
1564
1565         /* Initialize the command */
1566         ctlx->outbuf.rmemreq.type = cpu_to_le16(HFA384x_USB_RMEMREQ);
1567         ctlx->outbuf.rmemreq.frmlen =
1568             cpu_to_le16(sizeof(ctlx->outbuf.rmemreq.offset) +
1569                         sizeof(ctlx->outbuf.rmemreq.page) + len);
1570         ctlx->outbuf.rmemreq.offset = cpu_to_le16(offset);
1571         ctlx->outbuf.rmemreq.page = cpu_to_le16(page);
1572
1573         ctlx->outbufsize = sizeof(ctlx->outbuf.rmemreq);
1574
1575         pr_debug("type=0x%04x frmlen=%d offset=0x%04x page=0x%04x\n",
1576                  ctlx->outbuf.rmemreq.type,
1577                  ctlx->outbuf.rmemreq.frmlen,
1578                  ctlx->outbuf.rmemreq.offset, ctlx->outbuf.rmemreq.page);
1579
1580         pr_debug("pktsize=%zd\n", ROUNDUP64(sizeof(ctlx->outbuf.rmemreq)));
1581
1582         ctlx->reapable = mode;
1583         ctlx->cmdcb = cmdcb;
1584         ctlx->usercb = usercb;
1585         ctlx->usercb_data = usercb_data;
1586
1587         result = hfa384x_usbctlx_submit(hw, ctlx);
1588         if (result != 0) {
1589                 kfree(ctlx);
1590         } else if (mode == DOWAIT) {
1591                 struct usbctlx_rmem_completor completor;
1592
1593                 result =
1594                     hfa384x_usbctlx_complete_sync(hw, ctlx,
1595                                                   init_rmem_completor
1596                                                   (&completor,
1597                                                    &ctlx->inbuf.rmemresp, data,
1598                                                    len));
1599         }
1600
1601 done:
1602         return result;
1603 }
1604
1605 /*----------------------------------------------------------------
1606 * hfa384x_dowmem
1607 *
1608 * Constructs a writemem CTLX and issues it.
1609 *
1610 * NOTE: Any changes to the 'post-submit' code in this function
1611 *       need to be carried over to hfa384x_cbwmem() since the handling
1612 *       is virtually identical.
1613 *
1614 * Arguments:
1615 *       hw              device structure
1616 *       mode            DOWAIT or DOASYNC
1617 *       page            MAC address space page (CMD format)
1618 *       offset          MAC address space offset
1619 *       data            Ptr to data buffer containing write data
1620 *       len             Length of the data to read (max == 2048)
1621 *       cmdcb           command callback for async calls, NULL for DOWAIT calls
1622 *       usercb          user callback for async calls, NULL for DOWAIT calls
1623 *       usercb_data     user supplied data pointer for async calls.
1624 *
1625 * Returns:
1626 *       0               success
1627 *       -ETIMEDOUT      timed out waiting for register ready or
1628 *                       command completion
1629 *       >0              command indicated error, Status and Resp0-2 are
1630 *                       in hw structure.
1631 *
1632 * Side effects:
1633 *
1634 * Call context:
1635 *       interrupt (DOWAIT)
1636 *       process (DOWAIT or DOASYNC)
1637 ----------------------------------------------------------------*/
1638 static int
1639 hfa384x_dowmem(hfa384x_t *hw,
1640                enum cmd_mode mode,
1641                u16 page,
1642                u16 offset,
1643                void *data,
1644                unsigned int len,
1645                ctlx_cmdcb_t cmdcb, ctlx_usercb_t usercb, void *usercb_data)
1646 {
1647         int result;
1648         hfa384x_usbctlx_t *ctlx;
1649
1650         pr_debug("page=0x%04x offset=0x%04x len=%d\n", page, offset, len);
1651
1652         ctlx = usbctlx_alloc();
1653         if (!ctlx) {
1654                 result = -ENOMEM;
1655                 goto done;
1656         }
1657
1658         /* Initialize the command */
1659         ctlx->outbuf.wmemreq.type = cpu_to_le16(HFA384x_USB_WMEMREQ);
1660         ctlx->outbuf.wmemreq.frmlen =
1661             cpu_to_le16(sizeof(ctlx->outbuf.wmemreq.offset) +
1662                         sizeof(ctlx->outbuf.wmemreq.page) + len);
1663         ctlx->outbuf.wmemreq.offset = cpu_to_le16(offset);
1664         ctlx->outbuf.wmemreq.page = cpu_to_le16(page);
1665         memcpy(ctlx->outbuf.wmemreq.data, data, len);
1666
1667         ctlx->outbufsize = sizeof(ctlx->outbuf.wmemreq.type) +
1668             sizeof(ctlx->outbuf.wmemreq.frmlen) +
1669             sizeof(ctlx->outbuf.wmemreq.offset) +
1670             sizeof(ctlx->outbuf.wmemreq.page) + len;
1671
1672         ctlx->reapable = mode;
1673         ctlx->cmdcb = cmdcb;
1674         ctlx->usercb = usercb;
1675         ctlx->usercb_data = usercb_data;
1676
1677         result = hfa384x_usbctlx_submit(hw, ctlx);
1678         if (result != 0) {
1679                 kfree(ctlx);
1680         } else if (mode == DOWAIT) {
1681                 struct usbctlx_cmd_completor completor;
1682                 hfa384x_cmdresult_t wmemresult;
1683
1684                 result = hfa384x_usbctlx_complete_sync(hw,
1685                                                        ctlx,
1686                                                        init_wmem_completor
1687                                                        (&completor,
1688                                                         &ctlx->inbuf.wmemresp,
1689                                                         &wmemresult));
1690         }
1691
1692 done:
1693         return result;
1694 }
1695
1696 /*----------------------------------------------------------------
1697 * hfa384x_drvr_disable
1698 *
1699 * Issues the disable command to stop communications on one of
1700 * the MACs 'ports'.  Only macport 0 is valid  for stations.
1701 * APs may also disable macports 1-6.  Only ports that have been
1702 * previously enabled may be disabled.
1703 *
1704 * Arguments:
1705 *       hw              device structure
1706 *       macport         MAC port number (host order)
1707 *
1708 * Returns:
1709 *       0               success
1710 *       >0              f/w reported failure - f/w status code
1711 *       <0              driver reported error (timeout|bad arg)
1712 *
1713 * Side effects:
1714 *
1715 * Call context:
1716 *       process
1717 ----------------------------------------------------------------*/
1718 int hfa384x_drvr_disable(hfa384x_t *hw, u16 macport)
1719 {
1720         int result = 0;
1721
1722         if ((!hw->isap && macport != 0) ||
1723             (hw->isap && !(macport <= HFA384x_PORTID_MAX)) ||
1724             !(hw->port_enabled[macport])) {
1725                 result = -EINVAL;
1726         } else {
1727                 result = hfa384x_cmd_disable(hw, macport);
1728                 if (result == 0)
1729                         hw->port_enabled[macport] = 0;
1730         }
1731         return result;
1732 }
1733
1734 /*----------------------------------------------------------------
1735 * hfa384x_drvr_enable
1736 *
1737 * Issues the enable command to enable communications on one of
1738 * the MACs 'ports'.  Only macport 0 is valid  for stations.
1739 * APs may also enable macports 1-6.  Only ports that are currently
1740 * disabled may be enabled.
1741 *
1742 * Arguments:
1743 *       hw              device structure
1744 *       macport         MAC port number
1745 *
1746 * Returns:
1747 *       0               success
1748 *       >0              f/w reported failure - f/w status code
1749 *       <0              driver reported error (timeout|bad arg)
1750 *
1751 * Side effects:
1752 *
1753 * Call context:
1754 *       process
1755 ----------------------------------------------------------------*/
1756 int hfa384x_drvr_enable(hfa384x_t *hw, u16 macport)
1757 {
1758         int result = 0;
1759
1760         if ((!hw->isap && macport != 0) ||
1761             (hw->isap && !(macport <= HFA384x_PORTID_MAX)) ||
1762             (hw->port_enabled[macport])) {
1763                 result = -EINVAL;
1764         } else {
1765                 result = hfa384x_cmd_enable(hw, macport);
1766                 if (result == 0)
1767                         hw->port_enabled[macport] = 1;
1768         }
1769         return result;
1770 }
1771
1772 /*----------------------------------------------------------------
1773 * hfa384x_drvr_flashdl_enable
1774 *
1775 * Begins the flash download state.  Checks to see that we're not
1776 * already in a download state and that a port isn't enabled.
1777 * Sets the download state and retrieves the flash download
1778 * buffer location, buffer size, and timeout length.
1779 *
1780 * Arguments:
1781 *       hw              device structure
1782 *
1783 * Returns:
1784 *       0               success
1785 *       >0              f/w reported error - f/w status code
1786 *       <0              driver reported error
1787 *
1788 * Side effects:
1789 *
1790 * Call context:
1791 *       process
1792 ----------------------------------------------------------------*/
1793 int hfa384x_drvr_flashdl_enable(hfa384x_t *hw)
1794 {
1795         int result = 0;
1796         int i;
1797
1798         /* Check that a port isn't active */
1799         for (i = 0; i < HFA384x_PORTID_MAX; i++) {
1800                 if (hw->port_enabled[i]) {
1801                         pr_debug("called when port enabled.\n");
1802                         return -EINVAL;
1803                 }
1804         }
1805
1806         /* Check that we're not already in a download state */
1807         if (hw->dlstate != HFA384x_DLSTATE_DISABLED)
1808                 return -EINVAL;
1809
1810         /* Retrieve the buffer loc&size and timeout */
1811         result = hfa384x_drvr_getconfig(hw, HFA384x_RID_DOWNLOADBUFFER,
1812                                         &(hw->bufinfo), sizeof(hw->bufinfo));
1813         if (result)
1814                 return result;
1815
1816         hw->bufinfo.page = le16_to_cpu(hw->bufinfo.page);
1817         hw->bufinfo.offset = le16_to_cpu(hw->bufinfo.offset);
1818         hw->bufinfo.len = le16_to_cpu(hw->bufinfo.len);
1819         result = hfa384x_drvr_getconfig16(hw, HFA384x_RID_MAXLOADTIME,
1820                                           &(hw->dltimeout));
1821         if (result)
1822                 return result;
1823
1824         hw->dltimeout = le16_to_cpu(hw->dltimeout);
1825
1826         pr_debug("flashdl_enable\n");
1827
1828         hw->dlstate = HFA384x_DLSTATE_FLASHENABLED;
1829
1830         return result;
1831 }
1832
1833 /*----------------------------------------------------------------
1834 * hfa384x_drvr_flashdl_disable
1835 *
1836 * Ends the flash download state.  Note that this will cause the MAC
1837 * firmware to restart.
1838 *
1839 * Arguments:
1840 *       hw              device structure
1841 *
1842 * Returns:
1843 *       0               success
1844 *       >0              f/w reported error - f/w status code
1845 *       <0              driver reported error
1846 *
1847 * Side effects:
1848 *
1849 * Call context:
1850 *       process
1851 ----------------------------------------------------------------*/
1852 int hfa384x_drvr_flashdl_disable(hfa384x_t *hw)
1853 {
1854         /* Check that we're already in the download state */
1855         if (hw->dlstate != HFA384x_DLSTATE_FLASHENABLED)
1856                 return -EINVAL;
1857
1858         pr_debug("flashdl_enable\n");
1859
1860         /* There isn't much we can do at this point, so I don't */
1861         /*  bother  w/ the return value */
1862         hfa384x_cmd_download(hw, HFA384x_PROGMODE_DISABLE, 0, 0, 0);
1863         hw->dlstate = HFA384x_DLSTATE_DISABLED;
1864
1865         return 0;
1866 }
1867
1868 /*----------------------------------------------------------------
1869 * hfa384x_drvr_flashdl_write
1870 *
1871 * Performs a FLASH download of a chunk of data. First checks to see
1872 * that we're in the FLASH download state, then sets the download
1873 * mode, uses the aux functions to 1) copy the data to the flash
1874 * buffer, 2) sets the download 'write flash' mode, 3) readback and
1875 * compare.  Lather rinse, repeat as many times an necessary to get
1876 * all the given data into flash.
1877 * When all data has been written using this function (possibly
1878 * repeatedly), call drvr_flashdl_disable() to end the download state
1879 * and restart the MAC.
1880 *
1881 * Arguments:
1882 *       hw              device structure
1883 *       daddr           Card address to write to. (host order)
1884 *       buf             Ptr to data to write.
1885 *       len             Length of data (host order).
1886 *
1887 * Returns:
1888 *       0               success
1889 *       >0              f/w reported error - f/w status code
1890 *       <0              driver reported error
1891 *
1892 * Side effects:
1893 *
1894 * Call context:
1895 *       process
1896 ----------------------------------------------------------------*/
1897 int hfa384x_drvr_flashdl_write(hfa384x_t *hw, u32 daddr, void *buf, u32 len)
1898 {
1899         int result = 0;
1900         u32 dlbufaddr;
1901         int nburns;
1902         u32 burnlen;
1903         u32 burndaddr;
1904         u16 burnlo;
1905         u16 burnhi;
1906         int nwrites;
1907         u8 *writebuf;
1908         u16 writepage;
1909         u16 writeoffset;
1910         u32 writelen;
1911         int i;
1912         int j;
1913
1914         pr_debug("daddr=0x%08x len=%d\n", daddr, len);
1915
1916         /* Check that we're in the flash download state */
1917         if (hw->dlstate != HFA384x_DLSTATE_FLASHENABLED)
1918                 return -EINVAL;
1919
1920         netdev_info(hw->wlandev->netdev,
1921                     "Download %d bytes to flash @0x%06x\n", len, daddr);
1922
1923         /* Convert to flat address for arithmetic */
1924         /* NOTE: dlbuffer RID stores the address in AUX format */
1925         dlbufaddr =
1926             HFA384x_ADDR_AUX_MKFLAT(hw->bufinfo.page, hw->bufinfo.offset);
1927         pr_debug("dlbuf.page=0x%04x dlbuf.offset=0x%04x dlbufaddr=0x%08x\n",
1928                  hw->bufinfo.page, hw->bufinfo.offset, dlbufaddr);
1929         /* Calculations to determine how many fills of the dlbuffer to do
1930          * and how many USB wmemreq's to do for each fill.  At this point
1931          * in time, the dlbuffer size and the wmemreq size are the same.
1932          * Therefore, nwrites should always be 1.  The extra complexity
1933          * here is a hedge against future changes.
1934          */
1935
1936         /* Figure out how many times to do the flash programming */
1937         nburns = len / hw->bufinfo.len;
1938         nburns += (len % hw->bufinfo.len) ? 1 : 0;
1939
1940         /* For each flash program cycle, how many USB wmemreq's are needed? */
1941         nwrites = hw->bufinfo.len / HFA384x_USB_RWMEM_MAXLEN;
1942         nwrites += (hw->bufinfo.len % HFA384x_USB_RWMEM_MAXLEN) ? 1 : 0;
1943
1944         /* For each burn */
1945         for (i = 0; i < nburns; i++) {
1946                 /* Get the dest address and len */
1947                 burnlen = (len - (hw->bufinfo.len * i)) > hw->bufinfo.len ?
1948                     hw->bufinfo.len : (len - (hw->bufinfo.len * i));
1949                 burndaddr = daddr + (hw->bufinfo.len * i);
1950                 burnlo = HFA384x_ADDR_CMD_MKOFF(burndaddr);
1951                 burnhi = HFA384x_ADDR_CMD_MKPAGE(burndaddr);
1952
1953                 netdev_info(hw->wlandev->netdev, "Writing %d bytes to flash @0x%06x\n",
1954                             burnlen, burndaddr);
1955
1956                 /* Set the download mode */
1957                 result = hfa384x_cmd_download(hw, HFA384x_PROGMODE_NV,
1958                                               burnlo, burnhi, burnlen);
1959                 if (result) {
1960                         netdev_err(hw->wlandev->netdev,
1961                                    "download(NV,lo=%x,hi=%x,len=%x) cmd failed, result=%d. Aborting d/l\n",
1962                                    burnlo, burnhi, burnlen, result);
1963                         goto exit_proc;
1964                 }
1965
1966                 /* copy the data to the flash download buffer */
1967                 for (j = 0; j < nwrites; j++) {
1968                         writebuf = buf +
1969                             (i * hw->bufinfo.len) +
1970                             (j * HFA384x_USB_RWMEM_MAXLEN);
1971
1972                         writepage = HFA384x_ADDR_CMD_MKPAGE(dlbufaddr +
1973                                                 (j * HFA384x_USB_RWMEM_MAXLEN));
1974                         writeoffset = HFA384x_ADDR_CMD_MKOFF(dlbufaddr +
1975                                                 (j * HFA384x_USB_RWMEM_MAXLEN));
1976
1977                         writelen = burnlen - (j * HFA384x_USB_RWMEM_MAXLEN);
1978                         writelen = writelen > HFA384x_USB_RWMEM_MAXLEN ?
1979                             HFA384x_USB_RWMEM_MAXLEN : writelen;
1980
1981                         result = hfa384x_dowmem_wait(hw,
1982                                                      writepage,
1983                                                      writeoffset,
1984                                                      writebuf, writelen);
1985                 }
1986
1987                 /* set the download 'write flash' mode */
1988                 result = hfa384x_cmd_download(hw,
1989                                               HFA384x_PROGMODE_NVWRITE,
1990                                               0, 0, 0);
1991                 if (result) {
1992                         netdev_err(hw->wlandev->netdev,
1993                                    "download(NVWRITE,lo=%x,hi=%x,len=%x) cmd failed, result=%d. Aborting d/l\n",
1994                                    burnlo, burnhi, burnlen, result);
1995                         goto exit_proc;
1996                 }
1997
1998                 /* TODO: We really should do a readback and compare. */
1999         }
2000
2001 exit_proc:
2002
2003         /* Leave the firmware in the 'post-prog' mode.  flashdl_disable will */
2004         /*  actually disable programming mode.  Remember, that will cause the */
2005         /*  the firmware to effectively reset itself. */
2006
2007         return result;
2008 }
2009
2010 /*----------------------------------------------------------------
2011 * hfa384x_drvr_getconfig
2012 *
2013 * Performs the sequence necessary to read a config/info item.
2014 *
2015 * Arguments:
2016 *       hw              device structure
2017 *       rid             config/info record id (host order)
2018 *       buf             host side record buffer.  Upon return it will
2019 *                       contain the body portion of the record (minus the
2020 *                       RID and len).
2021 *       len             buffer length (in bytes, should match record length)
2022 *
2023 * Returns:
2024 *       0               success
2025 *       >0              f/w reported error - f/w status code
2026 *       <0              driver reported error
2027 *       -ENODATA        length mismatch between argument and retrieved
2028 *                       record.
2029 *
2030 * Side effects:
2031 *
2032 * Call context:
2033 *       process
2034 ----------------------------------------------------------------*/
2035 int hfa384x_drvr_getconfig(hfa384x_t *hw, u16 rid, void *buf, u16 len)
2036 {
2037         return hfa384x_dorrid_wait(hw, rid, buf, len);
2038 }
2039
2040 /*----------------------------------------------------------------
2041  * hfa384x_drvr_setconfig_async
2042  *
2043  * Performs the sequence necessary to write a config/info item.
2044  *
2045  * Arguments:
2046  *       hw              device structure
2047  *       rid             config/info record id (in host order)
2048  *       buf             host side record buffer
2049  *       len             buffer length (in bytes)
2050  *       usercb          completion callback
2051  *       usercb_data     completion callback argument
2052  *
2053  * Returns:
2054  *       0               success
2055  *       >0              f/w reported error - f/w status code
2056  *       <0              driver reported error
2057  *
2058  * Side effects:
2059  *
2060  * Call context:
2061  *       process
2062  ----------------------------------------------------------------*/
2063 int
2064 hfa384x_drvr_setconfig_async(hfa384x_t *hw,
2065                              u16 rid,
2066                              void *buf,
2067                              u16 len, ctlx_usercb_t usercb, void *usercb_data)
2068 {
2069         return hfa384x_dowrid_async(hw, rid, buf, len,
2070                                     hfa384x_cb_status, usercb, usercb_data);
2071 }
2072
2073 /*----------------------------------------------------------------
2074 * hfa384x_drvr_ramdl_disable
2075 *
2076 * Ends the ram download state.
2077 *
2078 * Arguments:
2079 *       hw              device structure
2080 *
2081 * Returns:
2082 *       0               success
2083 *       >0              f/w reported error - f/w status code
2084 *       <0              driver reported error
2085 *
2086 * Side effects:
2087 *
2088 * Call context:
2089 *       process
2090 ----------------------------------------------------------------*/
2091 int hfa384x_drvr_ramdl_disable(hfa384x_t *hw)
2092 {
2093         /* Check that we're already in the download state */
2094         if (hw->dlstate != HFA384x_DLSTATE_RAMENABLED)
2095                 return -EINVAL;
2096
2097         pr_debug("ramdl_disable()\n");
2098
2099         /* There isn't much we can do at this point, so I don't */
2100         /*  bother  w/ the return value */
2101         hfa384x_cmd_download(hw, HFA384x_PROGMODE_DISABLE, 0, 0, 0);
2102         hw->dlstate = HFA384x_DLSTATE_DISABLED;
2103
2104         return 0;
2105 }
2106
2107 /*----------------------------------------------------------------
2108 * hfa384x_drvr_ramdl_enable
2109 *
2110 * Begins the ram download state.  Checks to see that we're not
2111 * already in a download state and that a port isn't enabled.
2112 * Sets the download state and calls cmd_download with the
2113 * ENABLE_VOLATILE subcommand and the exeaddr argument.
2114 *
2115 * Arguments:
2116 *       hw              device structure
2117 *       exeaddr         the card execution address that will be
2118 *                       jumped to when ramdl_disable() is called
2119 *                       (host order).
2120 *
2121 * Returns:
2122 *       0               success
2123 *       >0              f/w reported error - f/w status code
2124 *       <0              driver reported error
2125 *
2126 * Side effects:
2127 *
2128 * Call context:
2129 *       process
2130 ----------------------------------------------------------------*/
2131 int hfa384x_drvr_ramdl_enable(hfa384x_t *hw, u32 exeaddr)
2132 {
2133         int result = 0;
2134         u16 lowaddr;
2135         u16 hiaddr;
2136         int i;
2137
2138         /* Check that a port isn't active */
2139         for (i = 0; i < HFA384x_PORTID_MAX; i++) {
2140                 if (hw->port_enabled[i]) {
2141                         netdev_err(hw->wlandev->netdev,
2142                                    "Can't download with a macport enabled.\n");
2143                         return -EINVAL;
2144                 }
2145         }
2146
2147         /* Check that we're not already in a download state */
2148         if (hw->dlstate != HFA384x_DLSTATE_DISABLED) {
2149                 netdev_err(hw->wlandev->netdev, "Download state not disabled.\n");
2150                 return -EINVAL;
2151         }
2152
2153         pr_debug("ramdl_enable, exeaddr=0x%08x\n", exeaddr);
2154
2155         /* Call the download(1,addr) function */
2156         lowaddr = HFA384x_ADDR_CMD_MKOFF(exeaddr);
2157         hiaddr = HFA384x_ADDR_CMD_MKPAGE(exeaddr);
2158
2159         result = hfa384x_cmd_download(hw, HFA384x_PROGMODE_RAM,
2160                                       lowaddr, hiaddr, 0);
2161
2162         if (result == 0) {
2163                 /* Set the download state */
2164                 hw->dlstate = HFA384x_DLSTATE_RAMENABLED;
2165         } else {
2166                 pr_debug("cmd_download(0x%04x, 0x%04x) failed, result=%d.\n",
2167                          lowaddr, hiaddr, result);
2168         }
2169
2170         return result;
2171 }
2172
2173 /*----------------------------------------------------------------
2174 * hfa384x_drvr_ramdl_write
2175 *
2176 * Performs a RAM download of a chunk of data. First checks to see
2177 * that we're in the RAM download state, then uses the [read|write]mem USB
2178 * commands to 1) copy the data, 2) readback and compare.  The download
2179 * state is unaffected.  When all data has been written using
2180 * this function, call drvr_ramdl_disable() to end the download state
2181 * and restart the MAC.
2182 *
2183 * Arguments:
2184 *       hw              device structure
2185 *       daddr           Card address to write to. (host order)
2186 *       buf             Ptr to data to write.
2187 *       len             Length of data (host order).
2188 *
2189 * Returns:
2190 *       0               success
2191 *       >0              f/w reported error - f/w status code
2192 *       <0              driver reported error
2193 *
2194 * Side effects:
2195 *
2196 * Call context:
2197 *       process
2198 ----------------------------------------------------------------*/
2199 int hfa384x_drvr_ramdl_write(hfa384x_t *hw, u32 daddr, void *buf, u32 len)
2200 {
2201         int result = 0;
2202         int nwrites;
2203         u8 *data = buf;
2204         int i;
2205         u32 curraddr;
2206         u16 currpage;
2207         u16 curroffset;
2208         u16 currlen;
2209
2210         /* Check that we're in the ram download state */
2211         if (hw->dlstate != HFA384x_DLSTATE_RAMENABLED)
2212                 return -EINVAL;
2213
2214         netdev_info(hw->wlandev->netdev, "Writing %d bytes to ram @0x%06x\n",
2215                     len, daddr);
2216
2217         /* How many dowmem calls?  */
2218         nwrites = len / HFA384x_USB_RWMEM_MAXLEN;
2219         nwrites += len % HFA384x_USB_RWMEM_MAXLEN ? 1 : 0;
2220
2221         /* Do blocking wmem's */
2222         for (i = 0; i < nwrites; i++) {
2223                 /* make address args */
2224                 curraddr = daddr + (i * HFA384x_USB_RWMEM_MAXLEN);
2225                 currpage = HFA384x_ADDR_CMD_MKPAGE(curraddr);
2226                 curroffset = HFA384x_ADDR_CMD_MKOFF(curraddr);
2227                 currlen = len - (i * HFA384x_USB_RWMEM_MAXLEN);
2228                 if (currlen > HFA384x_USB_RWMEM_MAXLEN)
2229                         currlen = HFA384x_USB_RWMEM_MAXLEN;
2230
2231                 /* Do blocking ctlx */
2232                 result = hfa384x_dowmem_wait(hw,
2233                                              currpage,
2234                                              curroffset,
2235                                              data +
2236                                              (i * HFA384x_USB_RWMEM_MAXLEN),
2237                                              currlen);
2238
2239                 if (result)
2240                         break;
2241
2242                 /* TODO: We really should have a readback. */
2243         }
2244
2245         return result;
2246 }
2247
2248 /*----------------------------------------------------------------
2249 * hfa384x_drvr_readpda
2250 *
2251 * Performs the sequence to read the PDA space.  Note there is no
2252 * drvr_writepda() function.  Writing a PDA is
2253 * generally implemented by a calling component via calls to
2254 * cmd_download and writing to the flash download buffer via the
2255 * aux regs.
2256 *
2257 * Arguments:
2258 *       hw              device structure
2259 *       buf             buffer to store PDA in
2260 *       len             buffer length
2261 *
2262 * Returns:
2263 *       0               success
2264 *       >0              f/w reported error - f/w status code
2265 *       <0              driver reported error
2266 *       -ETIMEDOUT      timeout waiting for the cmd regs to become
2267 *                       available, or waiting for the control reg
2268 *                       to indicate the Aux port is enabled.
2269 *       -ENODATA        the buffer does NOT contain a valid PDA.
2270 *                       Either the card PDA is bad, or the auxdata
2271 *                       reads are giving us garbage.
2272
2273 *
2274 * Side effects:
2275 *
2276 * Call context:
2277 *       process or non-card interrupt.
2278 ----------------------------------------------------------------*/
2279 int hfa384x_drvr_readpda(hfa384x_t *hw, void *buf, unsigned int len)
2280 {
2281         int result = 0;
2282         u16 *pda = buf;
2283         int pdaok = 0;
2284         int morepdrs = 1;
2285         int currpdr = 0;        /* word offset of the current pdr */
2286         size_t i;
2287         u16 pdrlen;             /* pdr length in bytes, host order */
2288         u16 pdrcode;            /* pdr code, host order */
2289         u16 currpage;
2290         u16 curroffset;
2291         struct pdaloc {
2292                 u32 cardaddr;
2293                 u16 auxctl;
2294         } pdaloc[] = {
2295                 {
2296                 HFA3842_PDA_BASE, 0}, {
2297                 HFA3841_PDA_BASE, 0}, {
2298                 HFA3841_PDA_BOGUS_BASE, 0}
2299         };
2300
2301         /* Read the pda from each known address.  */
2302         for (i = 0; i < ARRAY_SIZE(pdaloc); i++) {
2303                 /* Make address */
2304                 currpage = HFA384x_ADDR_CMD_MKPAGE(pdaloc[i].cardaddr);
2305                 curroffset = HFA384x_ADDR_CMD_MKOFF(pdaloc[i].cardaddr);
2306
2307                 /* units of bytes */
2308                 result = hfa384x_dormem_wait(hw, currpage, curroffset, buf,
2309                                                 len);
2310
2311                 if (result) {
2312                         netdev_warn(hw->wlandev->netdev,
2313                                     "Read from index %zd failed, continuing\n",
2314                                     i);
2315                         continue;
2316                 }
2317
2318                 /* Test for garbage */
2319                 pdaok = 1;      /* initially assume good */
2320                 morepdrs = 1;
2321                 while (pdaok && morepdrs) {
2322                         pdrlen = le16_to_cpu(pda[currpdr]) * 2;
2323                         pdrcode = le16_to_cpu(pda[currpdr + 1]);
2324                         /* Test the record length */
2325                         if (pdrlen > HFA384x_PDR_LEN_MAX || pdrlen == 0) {
2326                                 netdev_err(hw->wlandev->netdev,
2327                                            "pdrlen invalid=%d\n", pdrlen);
2328                                 pdaok = 0;
2329                                 break;
2330                         }
2331                         /* Test the code */
2332                         if (!hfa384x_isgood_pdrcode(pdrcode)) {
2333                                 netdev_err(hw->wlandev->netdev, "pdrcode invalid=%d\n",
2334                                            pdrcode);
2335                                 pdaok = 0;
2336                                 break;
2337                         }
2338                         /* Test for completion */
2339                         if (pdrcode == HFA384x_PDR_END_OF_PDA)
2340                                 morepdrs = 0;
2341
2342                         /* Move to the next pdr (if necessary) */
2343                         if (morepdrs) {
2344                                 /* note the access to pda[], need words here */
2345                                 currpdr += le16_to_cpu(pda[currpdr]) + 1;
2346                         }
2347                 }
2348                 if (pdaok) {
2349                         netdev_info(hw->wlandev->netdev,
2350                                     "PDA Read from 0x%08x in %s space.\n",
2351                                     pdaloc[i].cardaddr,
2352                                     pdaloc[i].auxctl == 0 ? "EXTDS" :
2353                                     pdaloc[i].auxctl == 1 ? "NV" :
2354                                     pdaloc[i].auxctl == 2 ? "PHY" :
2355                                     pdaloc[i].auxctl == 3 ? "ICSRAM" :
2356                                     "<bogus auxctl>");
2357                         break;
2358                 }
2359         }
2360         result = pdaok ? 0 : -ENODATA;
2361
2362         if (result)
2363                 pr_debug("Failure: pda is not okay\n");
2364
2365         return result;
2366 }
2367
2368 /*----------------------------------------------------------------
2369 * hfa384x_drvr_setconfig
2370 *
2371 * Performs the sequence necessary to write a config/info item.
2372 *
2373 * Arguments:
2374 *       hw              device structure
2375 *       rid             config/info record id (in host order)
2376 *       buf             host side record buffer
2377 *       len             buffer length (in bytes)
2378 *
2379 * Returns:
2380 *       0               success
2381 *       >0              f/w reported error - f/w status code
2382 *       <0              driver reported error
2383 *
2384 * Side effects:
2385 *
2386 * Call context:
2387 *       process
2388 ----------------------------------------------------------------*/
2389 int hfa384x_drvr_setconfig(hfa384x_t *hw, u16 rid, void *buf, u16 len)
2390 {
2391         return hfa384x_dowrid_wait(hw, rid, buf, len);
2392 }
2393
2394 /*----------------------------------------------------------------
2395 * hfa384x_drvr_start
2396 *
2397 * Issues the MAC initialize command, sets up some data structures,
2398 * and enables the interrupts.  After this function completes, the
2399 * low-level stuff should be ready for any/all commands.
2400 *
2401 * Arguments:
2402 *       hw              device structure
2403 * Returns:
2404 *       0               success
2405 *       >0              f/w reported error - f/w status code
2406 *       <0              driver reported error
2407 *
2408 * Side effects:
2409 *
2410 * Call context:
2411 *       process
2412 ----------------------------------------------------------------*/
2413
2414 int hfa384x_drvr_start(hfa384x_t *hw)
2415 {
2416         int result, result1, result2;
2417         u16 status;
2418
2419         might_sleep();
2420
2421         /* Clear endpoint stalls - but only do this if the endpoint
2422          * is showing a stall status. Some prism2 cards seem to behave
2423          * badly if a clear_halt is called when the endpoint is already
2424          * ok
2425          */
2426         result =
2427             usb_get_status(hw->usb, USB_RECIP_ENDPOINT, hw->endp_in, &status);
2428         if (result < 0) {
2429                 netdev_err(hw->wlandev->netdev, "Cannot get bulk in endpoint status.\n");
2430                 goto done;
2431         }
2432         if ((status == 1) && usb_clear_halt(hw->usb, hw->endp_in))
2433                 netdev_err(hw->wlandev->netdev, "Failed to reset bulk in endpoint.\n");
2434
2435         result =
2436             usb_get_status(hw->usb, USB_RECIP_ENDPOINT, hw->endp_out, &status);
2437         if (result < 0) {
2438                 netdev_err(hw->wlandev->netdev, "Cannot get bulk out endpoint status.\n");
2439                 goto done;
2440         }
2441         if ((status == 1) && usb_clear_halt(hw->usb, hw->endp_out))
2442                 netdev_err(hw->wlandev->netdev, "Failed to reset bulk out endpoint.\n");
2443
2444         /* Synchronous unlink, in case we're trying to restart the driver */
2445         usb_kill_urb(&hw->rx_urb);
2446
2447         /* Post the IN urb */
2448         result = submit_rx_urb(hw, GFP_KERNEL);
2449         if (result != 0) {
2450                 netdev_err(hw->wlandev->netdev,
2451                            "Fatal, failed to submit RX URB, result=%d\n",
2452                            result);
2453                 goto done;
2454         }
2455
2456         /* Call initialize twice, with a 1 second sleep in between.
2457          * This is a nasty work-around since many prism2 cards seem to
2458          * need time to settle after an init from cold. The second
2459          * call to initialize in theory is not necessary - but we call
2460          * it anyway as a double insurance policy:
2461          * 1) If the first init should fail, the second may well succeed
2462          *    and the card can still be used
2463          * 2) It helps ensures all is well with the card after the first
2464          *    init and settle time.
2465          */
2466         result1 = hfa384x_cmd_initialize(hw);
2467         msleep(1000);
2468         result = hfa384x_cmd_initialize(hw);
2469         result2 = result;
2470         if (result1 != 0) {
2471                 if (result2 != 0) {
2472                         netdev_err(hw->wlandev->netdev,
2473                                    "cmd_initialize() failed on two attempts, results %d and %d\n",
2474                                    result1, result2);
2475                         usb_kill_urb(&hw->rx_urb);
2476                         goto done;
2477                 } else {
2478                         pr_debug("First cmd_initialize() failed (result %d),\n",
2479                                  result1);
2480                         pr_debug("but second attempt succeeded. All should be ok\n");
2481                 }
2482         } else if (result2 != 0) {
2483                 netdev_warn(hw->wlandev->netdev, "First cmd_initialize() succeeded, but second attempt failed (result=%d)\n",
2484                             result2);
2485                 netdev_warn(hw->wlandev->netdev,
2486                             "Most likely the card will be functional\n");
2487                 goto done;
2488         }
2489
2490         hw->state = HFA384x_STATE_RUNNING;
2491
2492 done:
2493         return result;
2494 }
2495
2496 /*----------------------------------------------------------------
2497 * hfa384x_drvr_stop
2498 *
2499 * Shuts down the MAC to the point where it is safe to unload the
2500 * driver.  Any subsystem that may be holding a data or function
2501 * ptr into the driver must be cleared/deinitialized.
2502 *
2503 * Arguments:
2504 *       hw              device structure
2505 * Returns:
2506 *       0               success
2507 *       >0              f/w reported error - f/w status code
2508 *       <0              driver reported error
2509 *
2510 * Side effects:
2511 *
2512 * Call context:
2513 *       process
2514 ----------------------------------------------------------------*/
2515 int hfa384x_drvr_stop(hfa384x_t *hw)
2516 {
2517         int i;
2518
2519         might_sleep();
2520
2521         /* There's no need for spinlocks here. The USB "disconnect"
2522          * function sets this "removed" flag and then calls us.
2523          */
2524         if (!hw->wlandev->hwremoved) {
2525                 /* Call initialize to leave the MAC in its 'reset' state */
2526                 hfa384x_cmd_initialize(hw);
2527
2528                 /* Cancel the rxurb */
2529                 usb_kill_urb(&hw->rx_urb);
2530         }
2531
2532         hw->link_status = HFA384x_LINK_NOTCONNECTED;
2533         hw->state = HFA384x_STATE_INIT;
2534
2535         del_timer_sync(&hw->commsqual_timer);
2536
2537         /* Clear all the port status */
2538         for (i = 0; i < HFA384x_NUMPORTS_MAX; i++)
2539                 hw->port_enabled[i] = 0;
2540
2541         return 0;
2542 }
2543
2544 /*----------------------------------------------------------------
2545 * hfa384x_drvr_txframe
2546 *
2547 * Takes a frame from prism2sta and queues it for transmission.
2548 *
2549 * Arguments:
2550 *       hw              device structure
2551 *       skb             packet buffer struct.  Contains an 802.11
2552 *                       data frame.
2553 *       p80211_hdr      points to the 802.11 header for the packet.
2554 * Returns:
2555 *       0               Success and more buffs available
2556 *       1               Success but no more buffs
2557 *       2               Allocation failure
2558 *       4               Buffer full or queue busy
2559 *
2560 * Side effects:
2561 *
2562 * Call context:
2563 *       interrupt
2564 ----------------------------------------------------------------*/
2565 int hfa384x_drvr_txframe(hfa384x_t *hw, struct sk_buff *skb,
2566                          union p80211_hdr *p80211_hdr,
2567                          struct p80211_metawep *p80211_wep)
2568 {
2569         int usbpktlen = sizeof(struct hfa384x_tx_frame);
2570         int result;
2571         int ret;
2572         char *ptr;
2573
2574         if (hw->tx_urb.status == -EINPROGRESS) {
2575                 netdev_warn(hw->wlandev->netdev, "TX URB already in use\n");
2576                 result = 3;
2577                 goto exit;
2578         }
2579
2580         /* Build Tx frame structure */
2581         /* Set up the control field */
2582         memset(&hw->txbuff.txfrm.desc, 0, sizeof(hw->txbuff.txfrm.desc));
2583
2584         /* Setup the usb type field */
2585         hw->txbuff.type = cpu_to_le16(HFA384x_USB_TXFRM);
2586
2587         /* Set up the sw_support field to identify this frame */
2588         hw->txbuff.txfrm.desc.sw_support = 0x0123;
2589
2590 /* Tx complete and Tx exception disable per dleach.  Might be causing
2591  * buf depletion
2592  */
2593 /* #define DOEXC  SLP -- doboth breaks horribly under load, doexc less so. */
2594 #if defined(DOBOTH)
2595         hw->txbuff.txfrm.desc.tx_control =
2596             HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
2597             HFA384x_TX_TXEX_SET(1) | HFA384x_TX_TXOK_SET(1);
2598 #elif defined(DOEXC)
2599         hw->txbuff.txfrm.desc.tx_control =
2600             HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
2601             HFA384x_TX_TXEX_SET(1) | HFA384x_TX_TXOK_SET(0);
2602 #else
2603         hw->txbuff.txfrm.desc.tx_control =
2604             HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
2605             HFA384x_TX_TXEX_SET(0) | HFA384x_TX_TXOK_SET(0);
2606 #endif
2607         hw->txbuff.txfrm.desc.tx_control =
2608             cpu_to_le16(hw->txbuff.txfrm.desc.tx_control);
2609
2610         /* copy the header over to the txdesc */
2611         memcpy(&(hw->txbuff.txfrm.desc.frame_control), p80211_hdr,
2612                sizeof(union p80211_hdr));
2613
2614         /* if we're using host WEP, increase size by IV+ICV */
2615         if (p80211_wep->data) {
2616                 hw->txbuff.txfrm.desc.data_len = cpu_to_le16(skb->len + 8);
2617                 usbpktlen += 8;
2618         } else {
2619                 hw->txbuff.txfrm.desc.data_len = cpu_to_le16(skb->len);
2620         }
2621
2622         usbpktlen += skb->len;
2623
2624         /* copy over the WEP IV if we are using host WEP */
2625         ptr = hw->txbuff.txfrm.data;
2626         if (p80211_wep->data) {
2627                 memcpy(ptr, p80211_wep->iv, sizeof(p80211_wep->iv));
2628                 ptr += sizeof(p80211_wep->iv);
2629                 memcpy(ptr, p80211_wep->data, skb->len);
2630         } else {
2631                 memcpy(ptr, skb->data, skb->len);
2632         }
2633         /* copy over the packet data */
2634         ptr += skb->len;
2635
2636         /* copy over the WEP ICV if we are using host WEP */
2637         if (p80211_wep->data)
2638                 memcpy(ptr, p80211_wep->icv, sizeof(p80211_wep->icv));
2639
2640         /* Send the USB packet */
2641         usb_fill_bulk_urb(&(hw->tx_urb), hw->usb,
2642                           hw->endp_out,
2643                           &(hw->txbuff), ROUNDUP64(usbpktlen),
2644                           hfa384x_usbout_callback, hw->wlandev);
2645         hw->tx_urb.transfer_flags |= USB_QUEUE_BULK;
2646
2647         result = 1;
2648         ret = submit_tx_urb(hw, &hw->tx_urb, GFP_ATOMIC);
2649         if (ret != 0) {
2650                 netdev_err(hw->wlandev->netdev,
2651                            "submit_tx_urb() failed, error=%d\n", ret);
2652                 result = 3;
2653         }
2654
2655 exit:
2656         return result;
2657 }
2658
2659 void hfa384x_tx_timeout(struct wlandevice *wlandev)
2660 {
2661         hfa384x_t *hw = wlandev->priv;
2662         unsigned long flags;
2663
2664         spin_lock_irqsave(&hw->ctlxq.lock, flags);
2665
2666         if (!hw->wlandev->hwremoved) {
2667                 int sched;
2668
2669                 sched = !test_and_set_bit(WORK_TX_HALT, &hw->usb_flags);
2670                 sched |= !test_and_set_bit(WORK_RX_HALT, &hw->usb_flags);
2671                 if (sched)
2672                         schedule_work(&hw->usb_work);
2673         }
2674
2675         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
2676 }
2677
2678 /*----------------------------------------------------------------
2679 * hfa384x_usbctlx_reaper_task
2680 *
2681 * Tasklet to delete dead CTLX objects
2682 *
2683 * Arguments:
2684 *       data    ptr to a hfa384x_t
2685 *
2686 * Returns:
2687 *
2688 * Call context:
2689 *       Interrupt
2690 ----------------------------------------------------------------*/
2691 static void hfa384x_usbctlx_reaper_task(unsigned long data)
2692 {
2693         hfa384x_t *hw = (hfa384x_t *)data;
2694         hfa384x_usbctlx_t *ctlx, *temp;
2695         unsigned long flags;
2696
2697         spin_lock_irqsave(&hw->ctlxq.lock, flags);
2698
2699         /* This list is guaranteed to be empty if someone
2700          * has unplugged the adapter.
2701          */
2702         list_for_each_entry_safe(ctlx, temp, &hw->ctlxq.reapable, list) {
2703                 list_del(&ctlx->list);
2704                 kfree(ctlx);
2705         }
2706
2707         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
2708 }
2709
2710 /*----------------------------------------------------------------
2711 * hfa384x_usbctlx_completion_task
2712 *
2713 * Tasklet to call completion handlers for returned CTLXs
2714 *
2715 * Arguments:
2716 *       data    ptr to hfa384x_t
2717 *
2718 * Returns:
2719 *       Nothing
2720 *
2721 * Call context:
2722 *       Interrupt
2723 ----------------------------------------------------------------*/
2724 static void hfa384x_usbctlx_completion_task(unsigned long data)
2725 {
2726         hfa384x_t *hw = (hfa384x_t *)data;
2727         hfa384x_usbctlx_t *ctlx, *temp;
2728         unsigned long flags;
2729
2730         int reap = 0;
2731
2732         spin_lock_irqsave(&hw->ctlxq.lock, flags);
2733
2734         /* This list is guaranteed to be empty if someone
2735          * has unplugged the adapter ...
2736          */
2737         list_for_each_entry_safe(ctlx, temp, &hw->ctlxq.completing, list) {
2738                 /* Call the completion function that this
2739                  * command was assigned, assuming it has one.
2740                  */
2741                 if (ctlx->cmdcb) {
2742                         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
2743                         ctlx->cmdcb(hw, ctlx);
2744                         spin_lock_irqsave(&hw->ctlxq.lock, flags);
2745
2746                         /* Make sure we don't try and complete
2747                          * this CTLX more than once!
2748                          */
2749                         ctlx->cmdcb = NULL;
2750
2751                         /* Did someone yank the adapter out
2752                          * while our list was (briefly) unlocked?
2753                          */
2754                         if (hw->wlandev->hwremoved) {
2755                                 reap = 0;
2756                                 break;
2757                         }
2758                 }
2759
2760                 /*
2761                  * "Reapable" CTLXs are ones which don't have any
2762                  * threads waiting for them to die. Hence they must
2763                  * be delivered to The Reaper!
2764                  */
2765                 if (ctlx->reapable) {
2766                         /* Move the CTLX off the "completing" list (hopefully)
2767                          * on to the "reapable" list where the reaper task
2768                          * can find it. And "reapable" means that this CTLX
2769                          * isn't sitting on a wait-queue somewhere.
2770                          */
2771                         list_move_tail(&ctlx->list, &hw->ctlxq.reapable);
2772                         reap = 1;
2773                 }
2774
2775                 complete(&ctlx->done);
2776         }
2777         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
2778
2779         if (reap)
2780                 tasklet_schedule(&hw->reaper_bh);
2781 }
2782
2783 /*----------------------------------------------------------------
2784 * unlocked_usbctlx_cancel_async
2785 *
2786 * Mark the CTLX dead asynchronously, and ensure that the
2787 * next command on the queue is run afterwards.
2788 *
2789 * Arguments:
2790 *       hw      ptr to the hfa384x_t structure
2791 *       ctlx    ptr to a CTLX structure
2792 *
2793 * Returns:
2794 *       0       the CTLX's URB is inactive
2795 * -EINPROGRESS  the URB is currently being unlinked
2796 *
2797 * Call context:
2798 *       Either process or interrupt, but presumably interrupt
2799 ----------------------------------------------------------------*/
2800 static int unlocked_usbctlx_cancel_async(hfa384x_t *hw,
2801                                          hfa384x_usbctlx_t *ctlx)
2802 {
2803         int ret;
2804
2805         /*
2806          * Try to delete the URB containing our request packet.
2807          * If we succeed, then its completion handler will be
2808          * called with a status of -ECONNRESET.
2809          */
2810         hw->ctlx_urb.transfer_flags |= URB_ASYNC_UNLINK;
2811         ret = usb_unlink_urb(&hw->ctlx_urb);
2812
2813         if (ret != -EINPROGRESS) {
2814                 /*
2815                  * The OUT URB had either already completed
2816                  * or was still in the pending queue, so the
2817                  * URB's completion function will not be called.
2818                  * We will have to complete the CTLX ourselves.
2819                  */
2820                 ctlx->state = CTLX_REQ_FAILED;
2821                 unlocked_usbctlx_complete(hw, ctlx);
2822                 ret = 0;
2823         }
2824
2825         return ret;
2826 }
2827
2828 /*----------------------------------------------------------------
2829 * unlocked_usbctlx_complete
2830 *
2831 * A CTLX has completed.  It may have been successful, it may not
2832 * have been. At this point, the CTLX should be quiescent.  The URBs
2833 * aren't active and the timers should have been stopped.
2834 *
2835 * The CTLX is migrated to the "completing" queue, and the completing
2836 * tasklet is scheduled.
2837 *
2838 * Arguments:
2839 *       hw              ptr to a hfa384x_t structure
2840 *       ctlx            ptr to a ctlx structure
2841 *
2842 * Returns:
2843 *       nothing
2844 *
2845 * Side effects:
2846 *
2847 * Call context:
2848 *       Either, assume interrupt
2849 ----------------------------------------------------------------*/
2850 static void unlocked_usbctlx_complete(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx)
2851 {
2852         /* Timers have been stopped, and ctlx should be in
2853          * a terminal state. Retire it from the "active"
2854          * queue.
2855          */
2856         list_move_tail(&ctlx->list, &hw->ctlxq.completing);
2857         tasklet_schedule(&hw->completion_bh);
2858
2859         switch (ctlx->state) {
2860         case CTLX_COMPLETE:
2861         case CTLX_REQ_FAILED:
2862                 /* This are the correct terminating states. */
2863                 break;
2864
2865         default:
2866                 netdev_err(hw->wlandev->netdev, "CTLX[%d] not in a terminating state(%s)\n",
2867                            le16_to_cpu(ctlx->outbuf.type),
2868                            ctlxstr(ctlx->state));
2869                 break;
2870         }                       /* switch */
2871 }
2872
2873 /*----------------------------------------------------------------
2874 * hfa384x_usbctlxq_run
2875 *
2876 * Checks to see if the head item is running.  If not, starts it.
2877 *
2878 * Arguments:
2879 *       hw      ptr to hfa384x_t
2880 *
2881 * Returns:
2882 *       nothing
2883 *
2884 * Side effects:
2885 *
2886 * Call context:
2887 *       any
2888 ----------------------------------------------------------------*/
2889 static void hfa384x_usbctlxq_run(hfa384x_t *hw)
2890 {
2891         unsigned long flags;
2892
2893         /* acquire lock */
2894         spin_lock_irqsave(&hw->ctlxq.lock, flags);
2895
2896         /* Only one active CTLX at any one time, because there's no
2897          * other (reliable) way to match the response URB to the
2898          * correct CTLX.
2899          *
2900          * Don't touch any of these CTLXs if the hardware
2901          * has been removed or the USB subsystem is stalled.
2902          */
2903         if (!list_empty(&hw->ctlxq.active) ||
2904             test_bit(WORK_TX_HALT, &hw->usb_flags) || hw->wlandev->hwremoved)
2905                 goto unlock;
2906
2907         while (!list_empty(&hw->ctlxq.pending)) {
2908                 hfa384x_usbctlx_t *head;
2909                 int result;
2910
2911                 /* This is the first pending command */
2912                 head = list_entry(hw->ctlxq.pending.next,
2913                                   hfa384x_usbctlx_t, list);
2914
2915                 /* We need to split this off to avoid a race condition */
2916                 list_move_tail(&head->list, &hw->ctlxq.active);
2917
2918                 /* Fill the out packet */
2919                 usb_fill_bulk_urb(&(hw->ctlx_urb), hw->usb,
2920                                   hw->endp_out,
2921                                   &(head->outbuf), ROUNDUP64(head->outbufsize),
2922                                   hfa384x_ctlxout_callback, hw);
2923                 hw->ctlx_urb.transfer_flags |= USB_QUEUE_BULK;
2924
2925                 /* Now submit the URB and update the CTLX's state */
2926                 result = usb_submit_urb(&hw->ctlx_urb, GFP_ATOMIC);
2927                 if (result == 0) {
2928                         /* This CTLX is now running on the active queue */
2929                         head->state = CTLX_REQ_SUBMITTED;
2930
2931                         /* Start the OUT wait timer */
2932                         hw->req_timer_done = 0;
2933                         hw->reqtimer.expires = jiffies + HZ;
2934                         add_timer(&hw->reqtimer);
2935
2936                         /* Start the IN wait timer */
2937                         hw->resp_timer_done = 0;
2938                         hw->resptimer.expires = jiffies + 2 * HZ;
2939                         add_timer(&hw->resptimer);
2940
2941                         break;
2942                 }
2943
2944                 if (result == -EPIPE) {
2945                         /* The OUT pipe needs resetting, so put
2946                          * this CTLX back in the "pending" queue
2947                          * and schedule a reset ...
2948                          */
2949                         netdev_warn(hw->wlandev->netdev,
2950                                     "%s tx pipe stalled: requesting reset\n",
2951                                     hw->wlandev->netdev->name);
2952                         list_move(&head->list, &hw->ctlxq.pending);
2953                         set_bit(WORK_TX_HALT, &hw->usb_flags);
2954                         schedule_work(&hw->usb_work);
2955                         break;
2956                 }
2957
2958                 if (result == -ESHUTDOWN) {
2959                         netdev_warn(hw->wlandev->netdev, "%s urb shutdown!\n",
2960                                     hw->wlandev->netdev->name);
2961                         break;
2962                 }
2963
2964                 netdev_err(hw->wlandev->netdev, "Failed to submit CTLX[%d]: error=%d\n",
2965                            le16_to_cpu(head->outbuf.type), result);
2966                 unlocked_usbctlx_complete(hw, head);
2967         }                       /* while */
2968
2969 unlock:
2970         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
2971 }
2972
2973 /*----------------------------------------------------------------
2974 * hfa384x_usbin_callback
2975 *
2976 * Callback for URBs on the BULKIN endpoint.
2977 *
2978 * Arguments:
2979 *       urb             ptr to the completed urb
2980 *
2981 * Returns:
2982 *       nothing
2983 *
2984 * Side effects:
2985 *
2986 * Call context:
2987 *       interrupt
2988 ----------------------------------------------------------------*/
2989 static void hfa384x_usbin_callback(struct urb *urb)
2990 {
2991         struct wlandevice *wlandev = urb->context;
2992         hfa384x_t *hw;
2993         union hfa384x_usbin *usbin = (union hfa384x_usbin *)urb->transfer_buffer;
2994         struct sk_buff *skb = NULL;
2995         int result;
2996         int urb_status;
2997         u16 type;
2998
2999         enum USBIN_ACTION {
3000                 HANDLE,
3001                 RESUBMIT,
3002                 ABORT
3003         } action;
3004
3005         if (!wlandev || !wlandev->netdev || wlandev->hwremoved)
3006                 goto exit;
3007
3008         hw = wlandev->priv;
3009         if (!hw)
3010                 goto exit;
3011
3012         skb = hw->rx_urb_skb;
3013         BUG_ON(!skb || (skb->data != urb->transfer_buffer));
3014
3015         hw->rx_urb_skb = NULL;
3016
3017         /* Check for error conditions within the URB */
3018         switch (urb->status) {
3019         case 0:
3020                 action = HANDLE;
3021
3022                 /* Check for short packet */
3023                 if (urb->actual_length == 0) {
3024                         wlandev->netdev->stats.rx_errors++;
3025                         wlandev->netdev->stats.rx_length_errors++;
3026                         action = RESUBMIT;
3027                 }
3028                 break;
3029
3030         case -EPIPE:
3031                 netdev_warn(hw->wlandev->netdev, "%s rx pipe stalled: requesting reset\n",
3032                             wlandev->netdev->name);
3033                 if (!test_and_set_bit(WORK_RX_HALT, &hw->usb_flags))
3034                         schedule_work(&hw->usb_work);
3035                 wlandev->netdev->stats.rx_errors++;
3036                 action = ABORT;
3037                 break;
3038
3039         case -EILSEQ:
3040         case -ETIMEDOUT:
3041         case -EPROTO:
3042                 if (!test_and_set_bit(THROTTLE_RX, &hw->usb_flags) &&
3043                     !timer_pending(&hw->throttle)) {
3044                         mod_timer(&hw->throttle, jiffies + THROTTLE_JIFFIES);
3045                 }
3046                 wlandev->netdev->stats.rx_errors++;
3047                 action = ABORT;
3048                 break;
3049
3050         case -EOVERFLOW:
3051                 wlandev->netdev->stats.rx_over_errors++;
3052                 action = RESUBMIT;
3053                 break;
3054
3055         case -ENODEV:
3056         case -ESHUTDOWN:
3057                 pr_debug("status=%d, device removed.\n", urb->status);
3058                 action = ABORT;
3059                 break;
3060
3061         case -ENOENT:
3062         case -ECONNRESET:
3063                 pr_debug("status=%d, urb explicitly unlinked.\n", urb->status);
3064                 action = ABORT;
3065                 break;
3066
3067         default:
3068                 pr_debug("urb status=%d, transfer flags=0x%x\n",
3069                          urb->status, urb->transfer_flags);
3070                 wlandev->netdev->stats.rx_errors++;
3071                 action = RESUBMIT;
3072                 break;
3073         }
3074
3075         urb_status = urb->status;
3076
3077         if (action != ABORT) {
3078                 /* Repost the RX URB */
3079                 result = submit_rx_urb(hw, GFP_ATOMIC);
3080
3081                 if (result != 0) {
3082                         netdev_err(hw->wlandev->netdev,
3083                                    "Fatal, failed to resubmit rx_urb. error=%d\n",
3084                                    result);
3085                 }
3086         }
3087
3088         /* Handle any USB-IN packet */
3089         /* Note: the check of the sw_support field, the type field doesn't
3090          *       have bit 12 set like the docs suggest.
3091          */
3092         type = le16_to_cpu(usbin->type);
3093         if (HFA384x_USB_ISRXFRM(type)) {
3094                 if (action == HANDLE) {
3095                         if (usbin->txfrm.desc.sw_support == 0x0123) {
3096                                 hfa384x_usbin_txcompl(wlandev, usbin);
3097                         } else {
3098                                 skb_put(skb, sizeof(*usbin));
3099                                 hfa384x_usbin_rx(wlandev, skb);
3100                                 skb = NULL;
3101                         }
3102                 }
3103                 goto exit;
3104         }
3105         if (HFA384x_USB_ISTXFRM(type)) {
3106                 if (action == HANDLE)
3107                         hfa384x_usbin_txcompl(wlandev, usbin);
3108                 goto exit;
3109         }
3110         switch (type) {
3111         case HFA384x_USB_INFOFRM:
3112                 if (action == ABORT)
3113                         goto exit;
3114                 if (action == HANDLE)
3115                         hfa384x_usbin_info(wlandev, usbin);
3116                 break;
3117
3118         case HFA384x_USB_CMDRESP:
3119         case HFA384x_USB_WRIDRESP:
3120         case HFA384x_USB_RRIDRESP:
3121         case HFA384x_USB_WMEMRESP:
3122         case HFA384x_USB_RMEMRESP:
3123                 /* ALWAYS, ALWAYS, ALWAYS handle this CTLX!!!! */
3124                 hfa384x_usbin_ctlx(hw, usbin, urb_status);
3125                 break;
3126
3127         case HFA384x_USB_BUFAVAIL:
3128                 pr_debug("Received BUFAVAIL packet, frmlen=%d\n",
3129                          usbin->bufavail.frmlen);
3130                 break;
3131
3132         case HFA384x_USB_ERROR:
3133                 pr_debug("Received USB_ERROR packet, errortype=%d\n",
3134                          usbin->usberror.errortype);
3135                 break;
3136
3137         default:
3138                 pr_debug("Unrecognized USBIN packet, type=%x, status=%d\n",
3139                          usbin->type, urb_status);
3140                 break;
3141         }                       /* switch */
3142
3143 exit:
3144
3145         if (skb)
3146                 dev_kfree_skb(skb);
3147 }
3148
3149 /*----------------------------------------------------------------
3150 * hfa384x_usbin_ctlx
3151 *
3152 * We've received a URB containing a Prism2 "response" message.
3153 * This message needs to be matched up with a CTLX on the active
3154 * queue and our state updated accordingly.
3155 *
3156 * Arguments:
3157 *       hw              ptr to hfa384x_t
3158 *       usbin           ptr to USB IN packet
3159 *       urb_status      status of this Bulk-In URB
3160 *
3161 * Returns:
3162 *       nothing
3163 *
3164 * Side effects:
3165 *
3166 * Call context:
3167 *       interrupt
3168 ----------------------------------------------------------------*/
3169 static void hfa384x_usbin_ctlx(hfa384x_t *hw, union hfa384x_usbin *usbin,
3170                                int urb_status)
3171 {
3172         hfa384x_usbctlx_t *ctlx;
3173         int run_queue = 0;
3174         unsigned long flags;
3175
3176 retry:
3177         spin_lock_irqsave(&hw->ctlxq.lock, flags);
3178
3179         /* There can be only one CTLX on the active queue
3180          * at any one time, and this is the CTLX that the
3181          * timers are waiting for.
3182          */
3183         if (list_empty(&hw->ctlxq.active))
3184                 goto unlock;
3185
3186         /* Remove the "response timeout". It's possible that
3187          * we are already too late, and that the timeout is
3188          * already running. And that's just too bad for us,
3189          * because we could lose our CTLX from the active
3190          * queue here ...
3191          */
3192         if (del_timer(&hw->resptimer) == 0) {
3193                 if (hw->resp_timer_done == 0) {
3194                         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3195                         goto retry;
3196                 }
3197         } else {
3198                 hw->resp_timer_done = 1;
3199         }
3200
3201         ctlx = get_active_ctlx(hw);
3202
3203         if (urb_status != 0) {
3204                 /*
3205                  * Bad CTLX, so get rid of it. But we only
3206                  * remove it from the active queue if we're no
3207                  * longer expecting the OUT URB to complete.
3208                  */
3209                 if (unlocked_usbctlx_cancel_async(hw, ctlx) == 0)
3210                         run_queue = 1;
3211         } else {
3212                 const __le16 intype = (usbin->type & ~cpu_to_le16(0x8000));
3213
3214                 /*
3215                  * Check that our message is what we're expecting ...
3216                  */
3217                 if (ctlx->outbuf.type != intype) {
3218                         netdev_warn(hw->wlandev->netdev,
3219                                     "Expected IN[%d], received IN[%d] - ignored.\n",
3220                                     le16_to_cpu(ctlx->outbuf.type),
3221                                     le16_to_cpu(intype));
3222                         goto unlock;
3223                 }
3224
3225                 /* This URB has succeeded, so grab the data ... */
3226                 memcpy(&ctlx->inbuf, usbin, sizeof(ctlx->inbuf));
3227
3228                 switch (ctlx->state) {
3229                 case CTLX_REQ_SUBMITTED:
3230                         /*
3231                          * We have received our response URB before
3232                          * our request has been acknowledged. Odd,
3233                          * but our OUT URB is still alive...
3234                          */
3235                         pr_debug("Causality violation: please reboot Universe\n");
3236                         ctlx->state = CTLX_RESP_COMPLETE;
3237                         break;
3238
3239                 case CTLX_REQ_COMPLETE:
3240                         /*
3241                          * This is the usual path: our request
3242                          * has already been acknowledged, and
3243                          * now we have received the reply too.
3244                          */
3245                         ctlx->state = CTLX_COMPLETE;
3246                         unlocked_usbctlx_complete(hw, ctlx);
3247                         run_queue = 1;
3248                         break;
3249
3250                 default:
3251                         /*
3252                          * Throw this CTLX away ...
3253                          */
3254                         netdev_err(hw->wlandev->netdev,
3255                                    "Matched IN URB, CTLX[%d] in invalid state(%s). Discarded.\n",
3256                                    le16_to_cpu(ctlx->outbuf.type),
3257                                    ctlxstr(ctlx->state));
3258                         if (unlocked_usbctlx_cancel_async(hw, ctlx) == 0)
3259                                 run_queue = 1;
3260                         break;
3261                 }               /* switch */
3262         }
3263
3264 unlock:
3265         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3266
3267         if (run_queue)
3268                 hfa384x_usbctlxq_run(hw);
3269 }
3270
3271 /*----------------------------------------------------------------
3272 * hfa384x_usbin_txcompl
3273 *
3274 * At this point we have the results of a previous transmit.
3275 *
3276 * Arguments:
3277 *       wlandev         wlan device
3278 *       usbin           ptr to the usb transfer buffer
3279 *
3280 * Returns:
3281 *       nothing
3282 *
3283 * Side effects:
3284 *
3285 * Call context:
3286 *       interrupt
3287 ----------------------------------------------------------------*/
3288 static void hfa384x_usbin_txcompl(struct wlandevice *wlandev,
3289                                   union hfa384x_usbin *usbin)
3290 {
3291         u16 status;
3292
3293         status = le16_to_cpu(usbin->type); /* yeah I know it says type... */
3294
3295         /* Was there an error? */
3296         if (HFA384x_TXSTATUS_ISERROR(status))
3297                 prism2sta_ev_txexc(wlandev, status);
3298         else
3299                 prism2sta_ev_tx(wlandev, status);
3300 }
3301
3302 /*----------------------------------------------------------------
3303 * hfa384x_usbin_rx
3304 *
3305 * At this point we have a successful received a rx frame packet.
3306 *
3307 * Arguments:
3308 *       wlandev         wlan device
3309 *       usbin           ptr to the usb transfer buffer
3310 *
3311 * Returns:
3312 *       nothing
3313 *
3314 * Side effects:
3315 *
3316 * Call context:
3317 *       interrupt
3318 ----------------------------------------------------------------*/
3319 static void hfa384x_usbin_rx(struct wlandevice *wlandev, struct sk_buff *skb)
3320 {
3321         union hfa384x_usbin *usbin = (union hfa384x_usbin *)skb->data;
3322         hfa384x_t *hw = wlandev->priv;
3323         int hdrlen;
3324         struct p80211_rxmeta *rxmeta;
3325         u16 data_len;
3326         u16 fc;
3327
3328         /* Byte order convert once up front. */
3329         usbin->rxfrm.desc.status = le16_to_cpu(usbin->rxfrm.desc.status);
3330         usbin->rxfrm.desc.time = le32_to_cpu(usbin->rxfrm.desc.time);
3331
3332         /* Now handle frame based on port# */
3333         switch (HFA384x_RXSTATUS_MACPORT_GET(usbin->rxfrm.desc.status)) {
3334         case 0:
3335                 fc = le16_to_cpu(usbin->rxfrm.desc.frame_control);
3336
3337                 /* If exclude and we receive an unencrypted, drop it */
3338                 if ((wlandev->hostwep & HOSTWEP_EXCLUDEUNENCRYPTED) &&
3339                     !WLAN_GET_FC_ISWEP(fc)) {
3340                         break;
3341                 }
3342
3343                 data_len = le16_to_cpu(usbin->rxfrm.desc.data_len);
3344
3345                 /* How much header data do we have? */
3346                 hdrlen = p80211_headerlen(fc);
3347
3348                 /* Pull off the descriptor */
3349                 skb_pull(skb, sizeof(struct hfa384x_rx_frame));
3350
3351                 /* Now shunt the header block up against the data block
3352                  * with an "overlapping" copy
3353                  */
3354                 memmove(skb_push(skb, hdrlen),
3355                         &usbin->rxfrm.desc.frame_control, hdrlen);
3356
3357                 skb->dev = wlandev->netdev;
3358                 skb->dev->last_rx = jiffies;
3359
3360                 /* And set the frame length properly */
3361                 skb_trim(skb, data_len + hdrlen);
3362
3363                 /* The prism2 series does not return the CRC */
3364                 memset(skb_put(skb, WLAN_CRC_LEN), 0xff, WLAN_CRC_LEN);
3365
3366                 skb_reset_mac_header(skb);
3367
3368                 /* Attach the rxmeta, set some stuff */
3369                 p80211skb_rxmeta_attach(wlandev, skb);
3370                 rxmeta = P80211SKB_RXMETA(skb);
3371                 rxmeta->mactime = usbin->rxfrm.desc.time;
3372                 rxmeta->rxrate = usbin->rxfrm.desc.rate;
3373                 rxmeta->signal = usbin->rxfrm.desc.signal - hw->dbmadjust;
3374                 rxmeta->noise = usbin->rxfrm.desc.silence - hw->dbmadjust;
3375
3376                 p80211netdev_rx(wlandev, skb);
3377
3378                 break;
3379
3380         case 7:
3381                 if (!HFA384x_RXSTATUS_ISFCSERR(usbin->rxfrm.desc.status)) {
3382                         /* Copy to wlansnif skb */
3383                         hfa384x_int_rxmonitor(wlandev, &usbin->rxfrm);
3384                         dev_kfree_skb(skb);
3385                 } else {
3386                         pr_debug("Received monitor frame: FCSerr set\n");
3387                 }
3388                 break;
3389
3390         default:
3391                 netdev_warn(hw->wlandev->netdev, "Received frame on unsupported port=%d\n",
3392                             HFA384x_RXSTATUS_MACPORT_GET(
3393                                     usbin->rxfrm.desc.status));
3394                 break;
3395         }
3396 }
3397
3398 /*----------------------------------------------------------------
3399 * hfa384x_int_rxmonitor
3400 *
3401 * Helper function for int_rx.  Handles monitor frames.
3402 * Note that this function allocates space for the FCS and sets it
3403 * to 0xffffffff.  The hfa384x doesn't give us the FCS value but the
3404 * higher layers expect it.  0xffffffff is used as a flag to indicate
3405 * the FCS is bogus.
3406 *
3407 * Arguments:
3408 *       wlandev         wlan device structure
3409 *       rxfrm           rx descriptor read from card in int_rx
3410 *
3411 * Returns:
3412 *       nothing
3413 *
3414 * Side effects:
3415 *       Allocates an skb and passes it up via the PF_PACKET interface.
3416 * Call context:
3417 *       interrupt
3418 ----------------------------------------------------------------*/
3419 static void hfa384x_int_rxmonitor(struct wlandevice *wlandev,
3420                                   struct hfa384x_usb_rxfrm *rxfrm)
3421 {
3422         struct hfa384x_rx_frame *rxdesc = &(rxfrm->desc);
3423         unsigned int hdrlen = 0;
3424         unsigned int datalen = 0;
3425         unsigned int skblen = 0;
3426         u8 *datap;
3427         u16 fc;
3428         struct sk_buff *skb;
3429         hfa384x_t *hw = wlandev->priv;
3430
3431         /* Remember the status, time, and data_len fields are in host order */
3432         /* Figure out how big the frame is */
3433         fc = le16_to_cpu(rxdesc->frame_control);
3434         hdrlen = p80211_headerlen(fc);
3435         datalen = le16_to_cpu(rxdesc->data_len);
3436
3437         /* Allocate an ind message+framesize skb */
3438         skblen = sizeof(struct p80211_caphdr) + hdrlen + datalen + WLAN_CRC_LEN;
3439
3440         /* sanity check the length */
3441         if (skblen >
3442             (sizeof(struct p80211_caphdr) +
3443              WLAN_HDR_A4_LEN + WLAN_DATA_MAXLEN + WLAN_CRC_LEN)) {
3444                 pr_debug("overlen frm: len=%zd\n",
3445                          skblen - sizeof(struct p80211_caphdr));
3446         }
3447
3448         skb = dev_alloc_skb(skblen);
3449         if (!skb)
3450                 return;
3451
3452         /* only prepend the prism header if in the right mode */
3453         if ((wlandev->netdev->type == ARPHRD_IEEE80211_PRISM) &&
3454             (hw->sniffhdr != 0)) {
3455                 struct p80211_caphdr *caphdr;
3456                 /* The NEW header format! */
3457                 datap = skb_put(skb, sizeof(struct p80211_caphdr));
3458                 caphdr = (struct p80211_caphdr *)datap;
3459
3460                 caphdr->version = htonl(P80211CAPTURE_VERSION);
3461                 caphdr->length = htonl(sizeof(struct p80211_caphdr));
3462                 caphdr->mactime = __cpu_to_be64(rxdesc->time) * 1000;
3463                 caphdr->hosttime = __cpu_to_be64(jiffies);
3464                 caphdr->phytype = htonl(4);     /* dss_dot11_b */
3465                 caphdr->channel = htonl(hw->sniff_channel);
3466                 caphdr->datarate = htonl(rxdesc->rate);
3467                 caphdr->antenna = htonl(0);     /* unknown */
3468                 caphdr->priority = htonl(0);    /* unknown */
3469                 caphdr->ssi_type = htonl(3);    /* rssi_raw */
3470                 caphdr->ssi_signal = htonl(rxdesc->signal);
3471                 caphdr->ssi_noise = htonl(rxdesc->silence);
3472                 caphdr->preamble = htonl(0);    /* unknown */
3473                 caphdr->encoding = htonl(1);    /* cck */
3474         }
3475
3476         /* Copy the 802.11 header to the skb
3477            (ctl frames may be less than a full header) */
3478         datap = skb_put(skb, hdrlen);
3479         memcpy(datap, &(rxdesc->frame_control), hdrlen);
3480
3481         /* If any, copy the data from the card to the skb */
3482         if (datalen > 0) {
3483                 datap = skb_put(skb, datalen);
3484                 memcpy(datap, rxfrm->data, datalen);
3485
3486                 /* check for unencrypted stuff if WEP bit set. */
3487                 if (*(datap - hdrlen + 1) & 0x40)       /* wep set */
3488                         if ((*(datap) == 0xaa) && (*(datap + 1) == 0xaa))
3489                                 /* clear wep; it's the 802.2 header! */
3490                                 *(datap - hdrlen + 1) &= 0xbf;
3491         }
3492
3493         if (hw->sniff_fcs) {
3494                 /* Set the FCS */
3495                 datap = skb_put(skb, WLAN_CRC_LEN);
3496                 memset(datap, 0xff, WLAN_CRC_LEN);
3497         }
3498
3499         /* pass it back up */
3500         p80211netdev_rx(wlandev, skb);
3501 }
3502
3503 /*----------------------------------------------------------------
3504 * hfa384x_usbin_info
3505 *
3506 * At this point we have a successful received a Prism2 info frame.
3507 *
3508 * Arguments:
3509 *       wlandev         wlan device
3510 *       usbin           ptr to the usb transfer buffer
3511 *
3512 * Returns:
3513 *       nothing
3514 *
3515 * Side effects:
3516 *
3517 * Call context:
3518 *       interrupt
3519 ----------------------------------------------------------------*/
3520 static void hfa384x_usbin_info(struct wlandevice *wlandev,
3521                                union hfa384x_usbin *usbin)
3522 {
3523         usbin->infofrm.info.framelen =
3524             le16_to_cpu(usbin->infofrm.info.framelen);
3525         prism2sta_ev_info(wlandev, &usbin->infofrm.info);
3526 }
3527
3528 /*----------------------------------------------------------------
3529 * hfa384x_usbout_callback
3530 *
3531 * Callback for URBs on the BULKOUT endpoint.
3532 *
3533 * Arguments:
3534 *       urb             ptr to the completed urb
3535 *
3536 * Returns:
3537 *       nothing
3538 *
3539 * Side effects:
3540 *
3541 * Call context:
3542 *       interrupt
3543 ----------------------------------------------------------------*/
3544 static void hfa384x_usbout_callback(struct urb *urb)
3545 {
3546         struct wlandevice *wlandev = urb->context;
3547
3548 #ifdef DEBUG_USB
3549         dbprint_urb(urb);
3550 #endif
3551
3552         if (wlandev && wlandev->netdev) {
3553                 switch (urb->status) {
3554                 case 0:
3555                         prism2sta_ev_alloc(wlandev);
3556                         break;
3557
3558                 case -EPIPE:
3559                         {
3560                                 hfa384x_t *hw = wlandev->priv;
3561
3562                                 netdev_warn(hw->wlandev->netdev,
3563                                             "%s tx pipe stalled: requesting reset\n",
3564                                             wlandev->netdev->name);
3565                                 if (!test_and_set_bit
3566                                     (WORK_TX_HALT, &hw->usb_flags))
3567                                         schedule_work(&hw->usb_work);
3568                                 wlandev->netdev->stats.tx_errors++;
3569                                 break;
3570                         }
3571
3572                 case -EPROTO:
3573                 case -ETIMEDOUT:
3574                 case -EILSEQ:
3575                         {
3576                                 hfa384x_t *hw = wlandev->priv;
3577
3578                                 if (!test_and_set_bit
3579                                     (THROTTLE_TX, &hw->usb_flags) &&
3580                                     !timer_pending(&hw->throttle)) {
3581                                         mod_timer(&hw->throttle,
3582                                                   jiffies + THROTTLE_JIFFIES);
3583                                 }
3584                                 wlandev->netdev->stats.tx_errors++;
3585                                 netif_stop_queue(wlandev->netdev);
3586                                 break;
3587                         }
3588
3589                 case -ENOENT:
3590                 case -ESHUTDOWN:
3591                         /* Ignorable errors */
3592                         break;
3593
3594                 default:
3595                         netdev_info(wlandev->netdev, "unknown urb->status=%d\n",
3596                                     urb->status);
3597                         wlandev->netdev->stats.tx_errors++;
3598                         break;
3599                 }               /* switch */
3600         }
3601 }
3602
3603 /*----------------------------------------------------------------
3604 * hfa384x_ctlxout_callback
3605 *
3606 * Callback for control data on the BULKOUT endpoint.
3607 *
3608 * Arguments:
3609 *       urb             ptr to the completed urb
3610 *
3611 * Returns:
3612 * nothing
3613 *
3614 * Side effects:
3615 *
3616 * Call context:
3617 * interrupt
3618 ----------------------------------------------------------------*/
3619 static void hfa384x_ctlxout_callback(struct urb *urb)
3620 {
3621         hfa384x_t *hw = urb->context;
3622         int delete_resptimer = 0;
3623         int timer_ok = 1;
3624         int run_queue = 0;
3625         hfa384x_usbctlx_t *ctlx;
3626         unsigned long flags;
3627
3628         pr_debug("urb->status=%d\n", urb->status);
3629 #ifdef DEBUG_USB
3630         dbprint_urb(urb);
3631 #endif
3632         if ((urb->status == -ESHUTDOWN) ||
3633             (urb->status == -ENODEV) || !hw)
3634                 return;
3635
3636 retry:
3637         spin_lock_irqsave(&hw->ctlxq.lock, flags);
3638
3639         /*
3640          * Only one CTLX at a time on the "active" list, and
3641          * none at all if we are unplugged. However, we can
3642          * rely on the disconnect function to clean everything
3643          * up if someone unplugged the adapter.
3644          */
3645         if (list_empty(&hw->ctlxq.active)) {
3646                 spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3647                 return;
3648         }
3649
3650         /*
3651          * Having something on the "active" queue means
3652          * that we have timers to worry about ...
3653          */
3654         if (del_timer(&hw->reqtimer) == 0) {
3655                 if (hw->req_timer_done == 0) {
3656                         /*
3657                          * This timer was actually running while we
3658                          * were trying to delete it. Let it terminate
3659                          * gracefully instead.
3660                          */
3661                         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3662                         goto retry;
3663                 }
3664         } else {
3665                 hw->req_timer_done = 1;
3666         }
3667
3668         ctlx = get_active_ctlx(hw);
3669
3670         if (urb->status == 0) {
3671                 /* Request portion of a CTLX is successful */
3672                 switch (ctlx->state) {
3673                 case CTLX_REQ_SUBMITTED:
3674                         /* This OUT-ACK received before IN */
3675                         ctlx->state = CTLX_REQ_COMPLETE;
3676                         break;
3677
3678                 case CTLX_RESP_COMPLETE:
3679                         /* IN already received before this OUT-ACK,
3680                          * so this command must now be complete.
3681                          */
3682                         ctlx->state = CTLX_COMPLETE;
3683                         unlocked_usbctlx_complete(hw, ctlx);
3684                         run_queue = 1;
3685                         break;
3686
3687                 default:
3688                         /* This is NOT a valid CTLX "success" state! */
3689                         netdev_err(hw->wlandev->netdev,
3690                                    "Illegal CTLX[%d] success state(%s, %d) in OUT URB\n",
3691                                    le16_to_cpu(ctlx->outbuf.type),
3692                                    ctlxstr(ctlx->state), urb->status);
3693                         break;
3694                 }               /* switch */
3695         } else {
3696                 /* If the pipe has stalled then we need to reset it */
3697                 if ((urb->status == -EPIPE) &&
3698                     !test_and_set_bit(WORK_TX_HALT, &hw->usb_flags)) {
3699                         netdev_warn(hw->wlandev->netdev,
3700                                     "%s tx pipe stalled: requesting reset\n",
3701                                     hw->wlandev->netdev->name);
3702                         schedule_work(&hw->usb_work);
3703                 }
3704
3705                 /* If someone cancels the OUT URB then its status
3706                  * should be either -ECONNRESET or -ENOENT.
3707                  */
3708                 ctlx->state = CTLX_REQ_FAILED;
3709                 unlocked_usbctlx_complete(hw, ctlx);
3710                 delete_resptimer = 1;
3711                 run_queue = 1;
3712         }
3713
3714 delresp:
3715         if (delete_resptimer) {
3716                 timer_ok = del_timer(&hw->resptimer);
3717                 if (timer_ok != 0)
3718                         hw->resp_timer_done = 1;
3719         }
3720
3721         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3722
3723         if (!timer_ok && (hw->resp_timer_done == 0)) {
3724                 spin_lock_irqsave(&hw->ctlxq.lock, flags);
3725                 goto delresp;
3726         }
3727
3728         if (run_queue)
3729                 hfa384x_usbctlxq_run(hw);
3730 }
3731
3732 /*----------------------------------------------------------------
3733 * hfa384x_usbctlx_reqtimerfn
3734 *
3735 * Timer response function for CTLX request timeouts.  If this
3736 * function is called, it means that the callback for the OUT
3737 * URB containing a Prism2.x XXX_Request was never called.
3738 *
3739 * Arguments:
3740 *       data            a ptr to the hfa384x_t
3741 *
3742 * Returns:
3743 *       nothing
3744 *
3745 * Side effects:
3746 *
3747 * Call context:
3748 *       interrupt
3749 ----------------------------------------------------------------*/
3750 static void hfa384x_usbctlx_reqtimerfn(unsigned long data)
3751 {
3752         hfa384x_t *hw = (hfa384x_t *)data;
3753         unsigned long flags;
3754
3755         spin_lock_irqsave(&hw->ctlxq.lock, flags);
3756
3757         hw->req_timer_done = 1;
3758
3759         /* Removing the hardware automatically empties
3760          * the active list ...
3761          */
3762         if (!list_empty(&hw->ctlxq.active)) {
3763                 /*
3764                  * We must ensure that our URB is removed from
3765                  * the system, if it hasn't already expired.
3766                  */
3767                 hw->ctlx_urb.transfer_flags |= URB_ASYNC_UNLINK;
3768                 if (usb_unlink_urb(&hw->ctlx_urb) == -EINPROGRESS) {
3769                         hfa384x_usbctlx_t *ctlx = get_active_ctlx(hw);
3770
3771                         ctlx->state = CTLX_REQ_FAILED;
3772
3773                         /* This URB was active, but has now been
3774                          * cancelled. It will now have a status of
3775                          * -ECONNRESET in the callback function.
3776                          *
3777                          * We are cancelling this CTLX, so we're
3778                          * not going to need to wait for a response.
3779                          * The URB's callback function will check
3780                          * that this timer is truly dead.
3781                          */
3782                         if (del_timer(&hw->resptimer) != 0)
3783                                 hw->resp_timer_done = 1;
3784                 }
3785         }
3786
3787         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3788 }
3789
3790 /*----------------------------------------------------------------
3791 * hfa384x_usbctlx_resptimerfn
3792 *
3793 * Timer response function for CTLX response timeouts.  If this
3794 * function is called, it means that the callback for the IN
3795 * URB containing a Prism2.x XXX_Response was never called.
3796 *
3797 * Arguments:
3798 *       data            a ptr to the hfa384x_t
3799 *
3800 * Returns:
3801 *       nothing
3802 *
3803 * Side effects:
3804 *
3805 * Call context:
3806 *       interrupt
3807 ----------------------------------------------------------------*/
3808 static void hfa384x_usbctlx_resptimerfn(unsigned long data)
3809 {
3810         hfa384x_t *hw = (hfa384x_t *)data;
3811         unsigned long flags;
3812
3813         spin_lock_irqsave(&hw->ctlxq.lock, flags);
3814
3815         hw->resp_timer_done = 1;
3816
3817         /* The active list will be empty if the
3818          * adapter has been unplugged ...
3819          */
3820         if (!list_empty(&hw->ctlxq.active)) {
3821                 hfa384x_usbctlx_t *ctlx = get_active_ctlx(hw);
3822
3823                 if (unlocked_usbctlx_cancel_async(hw, ctlx) == 0) {
3824                         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3825                         hfa384x_usbctlxq_run(hw);
3826                         return;
3827                 }
3828         }
3829         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3830 }
3831
3832 /*----------------------------------------------------------------
3833 * hfa384x_usb_throttlefn
3834 *
3835 *
3836 * Arguments:
3837 *       data    ptr to hw
3838 *
3839 * Returns:
3840 *       Nothing
3841 *
3842 * Side effects:
3843 *
3844 * Call context:
3845 *       Interrupt
3846 ----------------------------------------------------------------*/
3847 static void hfa384x_usb_throttlefn(unsigned long data)
3848 {
3849         hfa384x_t *hw = (hfa384x_t *)data;
3850         unsigned long flags;
3851
3852         spin_lock_irqsave(&hw->ctlxq.lock, flags);
3853
3854         /*
3855          * We need to check BOTH the RX and the TX throttle controls,
3856          * so we use the bitwise OR instead of the logical OR.
3857          */
3858         pr_debug("flags=0x%lx\n", hw->usb_flags);
3859         if (!hw->wlandev->hwremoved &&
3860             ((test_and_clear_bit(THROTTLE_RX, &hw->usb_flags) &&
3861               !test_and_set_bit(WORK_RX_RESUME, &hw->usb_flags)) |
3862              (test_and_clear_bit(THROTTLE_TX, &hw->usb_flags) &&
3863               !test_and_set_bit(WORK_TX_RESUME, &hw->usb_flags))
3864             )) {
3865                 schedule_work(&hw->usb_work);
3866         }
3867
3868         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3869 }
3870
3871 /*----------------------------------------------------------------
3872 * hfa384x_usbctlx_submit
3873 *
3874 * Called from the doxxx functions to submit a CTLX to the queue
3875 *
3876 * Arguments:
3877 *       hw              ptr to the hw struct
3878 *       ctlx            ctlx structure to enqueue
3879 *
3880 * Returns:
3881 *       -ENODEV if the adapter is unplugged
3882 *       0
3883 *
3884 * Side effects:
3885 *
3886 * Call context:
3887 *       process or interrupt
3888 ----------------------------------------------------------------*/
3889 static int hfa384x_usbctlx_submit(hfa384x_t *hw, hfa384x_usbctlx_t *ctlx)
3890 {
3891         unsigned long flags;
3892
3893         spin_lock_irqsave(&hw->ctlxq.lock, flags);
3894
3895         if (hw->wlandev->hwremoved) {
3896                 spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3897                 return -ENODEV;
3898         }
3899
3900         ctlx->state = CTLX_PENDING;
3901         list_add_tail(&ctlx->list, &hw->ctlxq.pending);
3902         spin_unlock_irqrestore(&hw->ctlxq.lock, flags);
3903         hfa384x_usbctlxq_run(hw);
3904
3905         return 0;
3906 }
3907
3908 /*----------------------------------------------------------------
3909 * hfa384x_isgood_pdrcore
3910 *
3911 * Quick check of PDR codes.
3912 *
3913 * Arguments:
3914 *       pdrcode         PDR code number (host order)
3915 *
3916 * Returns:
3917 *       zero            not good.
3918 *       one             is good.
3919 *
3920 * Side effects:
3921 *
3922 * Call context:
3923 ----------------------------------------------------------------*/
3924 static int hfa384x_isgood_pdrcode(u16 pdrcode)
3925 {
3926         switch (pdrcode) {
3927         case HFA384x_PDR_END_OF_PDA:
3928         case HFA384x_PDR_PCB_PARTNUM:
3929         case HFA384x_PDR_PDAVER:
3930         case HFA384x_PDR_NIC_SERIAL:
3931         case HFA384x_PDR_MKK_MEASUREMENTS:
3932         case HFA384x_PDR_NIC_RAMSIZE:
3933         case HFA384x_PDR_MFISUPRANGE:
3934         case HFA384x_PDR_CFISUPRANGE:
3935         case HFA384x_PDR_NICID:
3936         case HFA384x_PDR_MAC_ADDRESS:
3937         case HFA384x_PDR_REGDOMAIN:
3938         case HFA384x_PDR_ALLOWED_CHANNEL:
3939         case HFA384x_PDR_DEFAULT_CHANNEL:
3940         case HFA384x_PDR_TEMPTYPE:
3941         case HFA384x_PDR_IFR_SETTING:
3942         case HFA384x_PDR_RFR_SETTING:
3943         case HFA384x_PDR_HFA3861_BASELINE:
3944         case HFA384x_PDR_HFA3861_SHADOW:
3945         case HFA384x_PDR_HFA3861_IFRF:
3946         case HFA384x_PDR_HFA3861_CHCALSP:
3947         case HFA384x_PDR_HFA3861_CHCALI:
3948         case HFA384x_PDR_3842_NIC_CONFIG:
3949         case HFA384x_PDR_USB_ID:
3950         case HFA384x_PDR_PCI_ID:
3951         case HFA384x_PDR_PCI_IFCONF:
3952         case HFA384x_PDR_PCI_PMCONF:
3953         case HFA384x_PDR_RFENRGY:
3954         case HFA384x_PDR_HFA3861_MANF_TESTSP:
3955         case HFA384x_PDR_HFA3861_MANF_TESTI:
3956                 /* code is OK */
3957                 return 1;
3958         default:
3959                 if (pdrcode < 0x1000) {
3960                         /* code is OK, but we don't know exactly what it is */
3961                         pr_debug("Encountered unknown PDR#=0x%04x, assuming it's ok.\n",
3962                                  pdrcode);
3963                         return 1;
3964                 }
3965                 break;
3966         }
3967         /* bad code */
3968         pr_debug("Encountered unknown PDR#=0x%04x, (>=0x1000), assuming it's bad.\n",
3969                  pdrcode);
3970         return 0;
3971 }