drivers/net/wireless/ath/wil6210/main.c

   1 /*
   2  * Copyright (c) 2012-2014 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/moduleparam.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/etherdevice.h>
  20
  21 #include "wil6210.h"
  22 #include "txrx.h"
  23 #include "wmi.h"
  24
  25 #define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000
  26 #define WAIT_FOR_DISCONNECT_INTERVAL_MS 10
  27
  28 static bool no_fw_recovery;
  29 module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
  30 MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
  31
  32 static bool no_fw_load = true;
  33 module_param(no_fw_load, bool, S_IRUGO | S_IWUSR);
  34 MODULE_PARM_DESC(no_fw_load, " do not download FW, use one in on-card flash.");
  35
  36 #define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
  37 #define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */
  38
  39 /*
  40  * Due to a hardware issue,
  41  * one has to read/write to/from NIC in 32-bit chunks;
  42  * regular memcpy_fromio and siblings will
  43  * not work on 64-bit platform - it uses 64-bit transactions
  44  *
  45  * Force 32-bit transactions to enable NIC on 64-bit platforms
  46  *
  47  * To avoid byte swap on big endian host, __raw_{read|write}l
  48  * should be used - {read|write}l would swap bytes to provide
  49  * little endian on PCI value in host endianness.
  50  */
  51 void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
  52                           size_t count)
  53 {
  54         u32 *d = dst;
  55         const volatile u32 __iomem *s = src;
  56
  57         /* size_t is unsigned, if (count%4 != 0) it will wrap */
  58         for (count += 4; count > 4; count -= 4)
  59                 *d++ = __raw_readl(s++);
  60 }
  61
  62 void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
  63                         size_t count)
  64 {
  65         volatile u32 __iomem *d = dst;
  66         const u32 *s = src;
  67
  68         for (count += 4; count > 4; count -= 4)
  69                 __raw_writel(*s++, d++);
  70 }
  71
  72 static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
  73 {
  74         uint i;
  75         struct net_device *ndev = wil_to_ndev(wil);
  76         struct wireless_dev *wdev = wil->wdev;
  77         struct wil_sta_info *sta = &wil->sta[cid];
  78
  79         wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
  80                      sta->status);
  81
  82         sta->data_port_open = false;
  83         if (sta->status != wil_sta_unused) {
  84                 wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
  85                 switch (wdev->iftype) {
  86                 case NL80211_IFTYPE_AP:
  87                 case NL80211_IFTYPE_P2P_GO:
  88                         /* AP-like interface */
  89                         cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
  90                         break;
  91                 default:
  92                         break;
  93                 }
  94                 sta->status = wil_sta_unused;
  95         }
  96
  97         for (i = 0; i < WIL_STA_TID_NUM; i++) {
  98                 struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
  99                 sta->tid_rx[i] = NULL;
 100                 wil_tid_ampdu_rx_free(wil, r);
 101         }
 102         for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
 103                 if (wil->vring2cid_tid[i][0] == cid)
 104                         wil_vring_fini_tx(wil, i);
 105         }
 106         memset(&sta->stats, 0, sizeof(sta->stats));
 107 }
 108
 109 static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 110 {
 111         int cid = -ENOENT;
 112         struct net_device *ndev = wil_to_ndev(wil);
 113         struct wireless_dev *wdev = wil->wdev;
 114
 115         might_sleep();
 116         if (bssid) {
 117                 cid = wil_find_cid(wil, bssid);
 118                 wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
 119         } else {
 120                 wil_dbg_misc(wil, "%s(all)\n", __func__);
 121         }
 122
 123         if (cid >= 0) /* disconnect 1 peer */
 124                 wil_disconnect_cid(wil, cid);
 125         else /* disconnect all */
 126                 for (cid = 0; cid < WIL6210_MAX_CID; cid++)
 127                         wil_disconnect_cid(wil, cid);
 128
 129         /* link state */
 130         switch (wdev->iftype) {
 131         case NL80211_IFTYPE_STATION:
 132         case NL80211_IFTYPE_P2P_CLIENT:
 133                 wil_link_off(wil);
 134                 if (test_bit(wil_status_fwconnected, &wil->status)) {
 135                         clear_bit(wil_status_fwconnected, &wil->status);
 136                         cfg80211_disconnected(ndev,
 137                                               WLAN_STATUS_UNSPECIFIED_FAILURE,
 138                                               NULL, 0, GFP_KERNEL);
 139                 } else if (test_bit(wil_status_fwconnecting, &wil->status)) {
 140                         cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
 141                                                 WLAN_STATUS_UNSPECIFIED_FAILURE,
 142                                                 GFP_KERNEL);
 143                 }
 144                 clear_bit(wil_status_fwconnecting, &wil->status);
 145                 break;
 146         default:
 147                 break;
 148         }
 149 }
 150
 151 static void wil_disconnect_worker(struct work_struct *work)
 152 {
 153         struct wil6210_priv *wil = container_of(work,
 154                         struct wil6210_priv, disconnect_worker);
 155
 156         mutex_lock(&wil->mutex);
 157         _wil6210_disconnect(wil, NULL);
 158         mutex_unlock(&wil->mutex);
 159 }
 160
 161 static void wil_connect_timer_fn(ulong x)
 162 {
 163         struct wil6210_priv *wil = (void *)x;
 164
 165         wil_dbg_misc(wil, "Connect timeout\n");
 166
 167         /* reschedule to thread context - disconnect won't
 168          * run from atomic context
 169          */
 170         schedule_work(&wil->disconnect_worker);
 171 }
 172
 173 static void wil_scan_timer_fn(ulong x)
 174 {
 175         struct wil6210_priv *wil = (void *)x;
 176
 177         clear_bit(wil_status_fwready, &wil->status);
 178         wil_err(wil, "Scan timeout detected, start fw error recovery\n");
 179         schedule_work(&wil->fw_error_worker);
 180 }
 181
 182 static void wil_fw_error_worker(struct work_struct *work)
 183 {
 184         struct wil6210_priv *wil = container_of(work,
 185                         struct wil6210_priv, fw_error_worker);
 186         struct wireless_dev *wdev = wil->wdev;
 187
 188         wil_dbg_misc(wil, "fw error worker\n");
 189
 190         if (no_fw_recovery)
 191                 return;
 192
 193         /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
 194          * passed since last recovery attempt
 195          */
 196         if (time_is_after_jiffies(wil->last_fw_recovery +
 197                                   WIL6210_FW_RECOVERY_TO))
 198                 wil->recovery_count++;
 199         else
 200                 wil->recovery_count = 1; /* fw was alive for a long time */
 201
 202         if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
 203                 wil_err(wil, "too many recovery attempts (%d), giving up\n",
 204                         wil->recovery_count);
 205                 return;
 206         }
 207
 208         wil->last_fw_recovery = jiffies;
 209
 210         mutex_lock(&wil->mutex);
 211         switch (wdev->iftype) {
 212         case NL80211_IFTYPE_STATION:
 213         case NL80211_IFTYPE_P2P_CLIENT:
 214         case NL80211_IFTYPE_MONITOR:
 215                 wil_info(wil, "fw error recovery started (try %d)...\n",
 216                          wil->recovery_count);
 217                 wil_reset(wil);
 218
 219                 /* need to re-allocate Rx ring after reset */
 220                 wil_rx_init(wil);
 221                 break;
 222         case NL80211_IFTYPE_AP:
 223         case NL80211_IFTYPE_P2P_GO:
 224                 /* recovery in these modes is done by upper layers */
 225                 break;
 226         default:
 227                 break;
 228         }
 229         mutex_unlock(&wil->mutex);
 230 }
 231
 232 static int wil_find_free_vring(struct wil6210_priv *wil)
 233 {
 234         int i;
 235
 236         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 237                 if (!wil->vring_tx[i].va)
 238                         return i;
 239         }
 240         return -EINVAL;
 241 }
 242
 243 static void wil_connect_worker(struct work_struct *work)
 244 {
 245         int rc;
 246         struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
 247                                                 connect_worker);
 248         int cid = wil->pending_connect_cid;
 249         int ringid = wil_find_free_vring(wil);
 250
 251         if (cid < 0) {
 252                 wil_err(wil, "No connection pending\n");
 253                 return;
 254         }
 255
 256         wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
 257
 258         rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
 259         wil->pending_connect_cid = -1;
 260         if (rc == 0) {
 261                 wil->sta[cid].status = wil_sta_connected;
 262                 wil_link_on(wil);
 263         } else {
 264                 wil->sta[cid].status = wil_sta_unused;
 265         }
 266 }
 267
 268 int wil_priv_init(struct wil6210_priv *wil)
 269 {
 270         wil_dbg_misc(wil, "%s()\n", __func__);
 271
 272         memset(wil->sta, 0, sizeof(wil->sta));
 273
 274         mutex_init(&wil->mutex);
 275         mutex_init(&wil->wmi_mutex);
 276
 277         init_completion(&wil->wmi_ready);
 278
 279         wil->pending_connect_cid = -1;
 280         setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
 281         setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
 282
 283         INIT_WORK(&wil->connect_worker, wil_connect_worker);
 284         INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
 285         INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
 286         INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
 287
 288         INIT_LIST_HEAD(&wil->pending_wmi_ev);
 289         spin_lock_init(&wil->wmi_ev_lock);
 290
 291         wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
 292         if (!wil->wmi_wq)
 293                 return -EAGAIN;
 294
 295         wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
 296         if (!wil->wmi_wq_conn) {
 297                 destroy_workqueue(wil->wmi_wq);
 298                 return -EAGAIN;
 299         }
 300
 301         wil->last_fw_recovery = jiffies;
 302
 303         return 0;
 304 }
 305
 306 void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
 307 {
 308         wil_dbg_misc(wil, "%s()\n", __func__);
 309
 310         del_timer_sync(&wil->connect_timer);
 311         _wil6210_disconnect(wil, bssid);
 312 }
 313
 314 void wil_priv_deinit(struct wil6210_priv *wil)
 315 {
 316         wil_dbg_misc(wil, "%s()\n", __func__);
 317
 318         del_timer_sync(&wil->scan_timer);
 319         cancel_work_sync(&wil->disconnect_worker);
 320         cancel_work_sync(&wil->fw_error_worker);
 321         mutex_lock(&wil->mutex);
 322         wil6210_disconnect(wil, NULL);
 323         mutex_unlock(&wil->mutex);
 324         wmi_event_flush(wil);
 325         destroy_workqueue(wil->wmi_wq_conn);
 326         destroy_workqueue(wil->wmi_wq);
 327 }
 328
 329 /* target operations */
 330 /* register read */
 331 #define R(a) ioread32(wil->csr + HOSTADDR(a))
 332 /* register write. wmb() to make sure it is completed */
 333 #define W(a, v) do { iowrite32(v, wil->csr + HOSTADDR(a)); wmb(); } while (0)
 334 /* register set = read, OR, write */
 335 #define S(a, v) W(a, R(a) | v)
 336 /* register clear = read, AND with inverted, write */
 337 #define C(a, v) W(a, R(a) & ~v)
 338
 339 static inline void wil_halt_cpu(struct wil6210_priv *wil)
 340 {
 341         W(RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
 342         W(RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
 343 }
 344
 345 static inline void wil_release_cpu(struct wil6210_priv *wil)
 346 {
 347         /* Start CPU */
 348         W(RGF_USER_USER_CPU_0, 1);
 349 }
 350
 351 static int wil_target_reset(struct wil6210_priv *wil)
 352 {
 353         int delay = 0;
 354         u32 hw_state;
 355         u32 rev_id;
 356         bool is_sparrow = (wil->board->board == WIL_BOARD_SPARROW);
 357
 358         wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->board->name);
 359
 360         wil->hw_version = R(RGF_USER_FW_REV_ID);
 361         rev_id = wil->hw_version & 0xff;
 362
 363         /* Clear MAC link up */
 364         S(RGF_HP_CTRL, BIT(15));
 365         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
 366         S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);
 367
 368         wil_halt_cpu(wil);
 369         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL); /* 40 MHz */
 370
 371         if (is_sparrow) {
 372                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
 373                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);
 374         }
 375
 376         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
 377         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
 378         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, is_sparrow ? 0x000000f0 : 0x00000170);
 379         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);
 380
 381         if (is_sparrow) {
 382                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
 383                 W(RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);
 384         }
 385
 386         W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
 387         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
 388         W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
 389         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 390
 391         if (is_sparrow) {
 392                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
 393                 /* reset A2 PCIE AHB */
 394                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 395         } else {
 396                 W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
 397                 if (rev_id == 1) {
 398                         /* reset A1 BOTH PCIE AHB & PCIE RGF */
 399                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
 400                 } else {
 401                         W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
 402                         W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
 403                 }
 404         }
 405
 406         /* TODO: check order here!!! Erez code is different */
 407         W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 408
 409         /* wait until device ready. typical time is 200..250 msec */
 410         do {
 411                 msleep(RST_DELAY);
 412                 hw_state = R(RGF_USER_HW_MACHINE_STATE);
 413                 if (delay++ > RST_COUNT) {
 414                         wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
 415                                 hw_state);
 416                         return -ETIME;
 417                 }
 418         } while (hw_state != HW_MACHINE_BOOT_DONE);
 419
 420         /* TODO: Erez check rev_id != 1 */
 421         if (!is_sparrow && (rev_id != 1))
 422                 W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
 423
 424         C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 425
 426         wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
 427         return 0;
 428 }
 429
 430 #undef R
 431 #undef W
 432 #undef S
 433 #undef C
 434
 435 void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
 436 {
 437         le32_to_cpus(&r->base);
 438         le16_to_cpus(&r->entry_size);
 439         le16_to_cpus(&r->size);
 440         le32_to_cpus(&r->tail);
 441         le32_to_cpus(&r->head);
 442 }
 443
 444 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 445 {
 446         ulong to = msecs_to_jiffies(1000);
 447         ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
 448
 449         if (0 == left) {
 450                 wil_err(wil, "Firmware not ready\n");
 451                 return -ETIME;
 452         } else {
 453                 wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
 454                          jiffies_to_msecs(to-left), wil->hw_version);
 455         }
 456         return 0;
 457 }
 458
 459 /*
 460  * We reset all the structures, and we reset the UMAC.
 461  * After calling this routine, you're expected to reload
 462  * the firmware.
 463  */
 464 int wil_reset(struct wil6210_priv *wil)
 465 {
 466         int rc;
 467
 468         wil_dbg_misc(wil, "%s()\n", __func__);
 469
 470         WARN_ON(!mutex_is_locked(&wil->mutex));
 471
 472         cancel_work_sync(&wil->disconnect_worker);
 473         wil6210_disconnect(wil, NULL);
 474
 475         wil->status = 0; /* prevent NAPI from being scheduled */
 476         if (test_bit(wil_status_napi_en, &wil->status))
 477                 napi_synchronize(&wil->napi_rx);
 478
 479         if (wil->scan_request) {
 480                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 481                              wil->scan_request);
 482                 del_timer_sync(&wil->scan_timer);
 483                 cfg80211_scan_done(wil->scan_request, true);
 484                 wil->scan_request = NULL;
 485         }
 486
 487         wil6210_disable_irq(wil);
 488
 489         wmi_event_flush(wil);
 490
 491         flush_workqueue(wil->wmi_wq_conn);
 492         flush_workqueue(wil->wmi_wq);
 493
 494         rc = wil_target_reset(wil);
 495         wil_rx_fini(wil);
 496         if (rc)
 497                 return rc;
 498
 499         if (!no_fw_load) {
 500                 wil_info(wil, "Use firmware <%s>\n", WIL_FW_NAME);
 501                 wil_halt_cpu(wil);
 502                 /* Loading f/w from the file */
 503                 rc = wil_request_firmware(wil, WIL_FW_NAME);
 504                 if (rc)
 505                         return rc;
 506
 507                 /* clear any interrupts which on-card-firmware may have set */
 508                 wil6210_clear_irq(wil);
 509                 { /* CAF_ICR - clear and mask */
 510                         u32 a = HOSTADDR(RGF_CAF_ICR) +
 511                                 offsetof(struct RGF_ICR, ICR);
 512                         u32 m = HOSTADDR(RGF_CAF_ICR) +
 513                                 offsetof(struct RGF_ICR, IMV);
 514                         u32 icr = ioread32(wil->csr + a);
 515
 516                         iowrite32(icr, wil->csr + a); /* W1C */
 517                         iowrite32(~0, wil->csr + m);
 518                         wmb(); /* wait for completion */
 519                 }
 520                 wil_release_cpu(wil);
 521         } else {
 522                 wil_info(wil, "Use firmware from on-card flash\n");
 523         }
 524
 525         /* init after reset */
 526         wil->pending_connect_cid = -1;
 527         reinit_completion(&wil->wmi_ready);
 528
 529         wil6210_enable_irq(wil);
 530
 531         /* we just started MAC, wait for FW ready */
 532         rc = wil_wait_for_fw_ready(wil);
 533
 534         return rc;
 535 }
 536
 537 void wil_fw_error_recovery(struct wil6210_priv *wil)
 538 {
 539         wil_dbg_misc(wil, "starting fw error recovery\n");
 540         schedule_work(&wil->fw_error_worker);
 541 }
 542
 543 void wil_link_on(struct wil6210_priv *wil)
 544 {
 545         struct net_device *ndev = wil_to_ndev(wil);
 546
 547         wil_dbg_misc(wil, "%s()\n", __func__);
 548
 549         netif_carrier_on(ndev);
 550         wil_dbg_misc(wil, "netif_tx_wake : link on\n");
 551         netif_tx_wake_all_queues(ndev);
 552 }
 553
 554 void wil_link_off(struct wil6210_priv *wil)
 555 {
 556         struct net_device *ndev = wil_to_ndev(wil);
 557
 558         wil_dbg_misc(wil, "%s()\n", __func__);
 559
 560         netif_tx_stop_all_queues(ndev);
 561         wil_dbg_misc(wil, "netif_tx_stop : link off\n");
 562         netif_carrier_off(ndev);
 563 }
 564
 565 static int __wil_up(struct wil6210_priv *wil)
 566 {
 567         struct net_device *ndev = wil_to_ndev(wil);
 568         struct wireless_dev *wdev = wil->wdev;
 569         int rc;
 570
 571         WARN_ON(!mutex_is_locked(&wil->mutex));
 572
 573         rc = wil_reset(wil);
 574         if (rc)
 575                 return rc;
 576
 577         /* Rx VRING. After MAC and beacon */
 578         rc = wil_rx_init(wil);
 579         if (rc)
 580                 return rc;
 581
 582         switch (wdev->iftype) {
 583         case NL80211_IFTYPE_STATION:
 584                 wil_dbg_misc(wil, "type: STATION\n");
 585                 ndev->type = ARPHRD_ETHER;
 586                 break;
 587         case NL80211_IFTYPE_AP:
 588                 wil_dbg_misc(wil, "type: AP\n");
 589                 ndev->type = ARPHRD_ETHER;
 590                 break;
 591         case NL80211_IFTYPE_P2P_CLIENT:
 592                 wil_dbg_misc(wil, "type: P2P_CLIENT\n");
 593                 ndev->type = ARPHRD_ETHER;
 594                 break;
 595         case NL80211_IFTYPE_P2P_GO:
 596                 wil_dbg_misc(wil, "type: P2P_GO\n");
 597                 ndev->type = ARPHRD_ETHER;
 598                 break;
 599         case NL80211_IFTYPE_MONITOR:
 600                 wil_dbg_misc(wil, "type: Monitor\n");
 601                 ndev->type = ARPHRD_IEEE80211_RADIOTAP;
 602                 /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
 603                 break;
 604         default:
 605                 return -EOPNOTSUPP;
 606         }
 607
 608         /* MAC address - pre-requisite for other commands */
 609         wmi_set_mac_address(wil, ndev->dev_addr);
 610
 611
 612         napi_enable(&wil->napi_rx);
 613         napi_enable(&wil->napi_tx);
 614         set_bit(wil_status_napi_en, &wil->status);
 615
 616         if (wil->platform_ops.bus_request)
 617                 wil->platform_ops.bus_request(wil->platform_handle,
 618                                               WIL_MAX_BUS_REQUEST_KBPS);
 619
 620         return 0;
 621 }
 622
 623 int wil_up(struct wil6210_priv *wil)
 624 {
 625         int rc;
 626
 627         wil_dbg_misc(wil, "%s()\n", __func__);
 628
 629         mutex_lock(&wil->mutex);
 630         rc = __wil_up(wil);
 631         mutex_unlock(&wil->mutex);
 632
 633         return rc;
 634 }
 635
 636 static int __wil_down(struct wil6210_priv *wil)
 637 {
 638         int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS /
 639                         WAIT_FOR_DISCONNECT_INTERVAL_MS;
 640
 641         WARN_ON(!mutex_is_locked(&wil->mutex));
 642
 643         if (wil->platform_ops.bus_request)
 644                 wil->platform_ops.bus_request(wil->platform_handle, 0);
 645
 646         clear_bit(wil_status_napi_en, &wil->status);
 647         napi_disable(&wil->napi_rx);
 648         napi_disable(&wil->napi_tx);
 649
 650         if (wil->scan_request) {
 651                 wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
 652                              wil->scan_request);
 653                 del_timer_sync(&wil->scan_timer);
 654                 cfg80211_scan_done(wil->scan_request, true);
 655                 wil->scan_request = NULL;
 656         }
 657
 658         if (test_bit(wil_status_fwconnected, &wil->status) ||
 659             test_bit(wil_status_fwconnecting, &wil->status))
 660                 wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0);
 661
 662         /* make sure wil is idle (not connected) */
 663         mutex_unlock(&wil->mutex);
 664         while (iter--) {
 665                 int idle = !test_bit(wil_status_fwconnected, &wil->status) &&
 666                            !test_bit(wil_status_fwconnecting, &wil->status);
 667                 if (idle)
 668                         break;
 669                 msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS);
 670         }
 671         mutex_lock(&wil->mutex);
 672
 673         if (!iter)
 674                 wil_err(wil, "timeout waiting for idle FW/HW\n");
 675
 676         wil_rx_fini(wil);
 677
 678         return 0;
 679 }
 680
 681 int wil_down(struct wil6210_priv *wil)
 682 {
 683         int rc;
 684
 685         wil_dbg_misc(wil, "%s()\n", __func__);
 686
 687         mutex_lock(&wil->mutex);
 688         rc = __wil_down(wil);
 689         mutex_unlock(&wil->mutex);
 690
 691         return rc;
 692 }
 693
 694 int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
 695 {
 696         int i;
 697         int rc = -ENOENT;
 698
 699         for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
 700                 if ((wil->sta[i].status != wil_sta_unused) &&
 701                     ether_addr_equal(wil->sta[i].addr, mac)) {
 702                         rc = i;
 703                         break;
 704                 }
 705         }
 706
 707         return rc;
 708 }