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

   1
   2 /*
   3  * Copyright (c) 2011 Atheros Communications Inc.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <linux/moduleparam.h>
  19 #include <linux/errno.h>
  20 #include <linux/of.h>
  21 #include <linux/mmc/sdio_func.h>
  22 #include "core.h"
  23 #include "cfg80211.h"
  24 #include "target.h"
  25 #include "debug.h"
  26 #include "hif-ops.h"
  27
  28 unsigned int debug_mask;
  29 static unsigned int testmode;
  30 static bool suspend_cutpower;
  31 static unsigned int uart_debug;
  32
  33 module_param(debug_mask, uint, 0644);
  34 module_param(testmode, uint, 0644);
  35 module_param(suspend_cutpower, bool, 0444);
  36 module_param(uart_debug, uint, 0644);
  37
  38 static const struct ath6kl_hw hw_list[] = {
  39         {
  40                 .id                             = AR6003_HW_2_0_VERSION,
  41                 .name                           = "ar6003 hw 2.0",
  42                 .dataset_patch_addr             = 0x57e884,
  43                 .app_load_addr                  = 0x543180,
  44                 .board_ext_data_addr            = 0x57e500,
  45                 .reserved_ram_size              = 6912,
  46                 .refclk_hz                      = 26000000,
  47                 .uarttx_pin                     = 8,
  48
  49                 /* hw2.0 needs override address hardcoded */
  50                 .app_start_override_addr        = 0x944C00,
  51
  52                 .fw = {
  53                         .dir            = AR6003_HW_2_0_FW_DIR,
  54                         .otp            = AR6003_HW_2_0_OTP_FILE,
  55                         .fw             = AR6003_HW_2_0_FIRMWARE_FILE,
  56                         .tcmd           = AR6003_HW_2_0_TCMD_FIRMWARE_FILE,
  57                         .patch          = AR6003_HW_2_0_PATCH_FILE,
  58                 },
  59
  60                 .fw_board               = AR6003_HW_2_0_BOARD_DATA_FILE,
  61                 .fw_default_board       = AR6003_HW_2_0_DEFAULT_BOARD_DATA_FILE,
  62         },
  63         {
  64                 .id                             = AR6003_HW_2_1_1_VERSION,
  65                 .name                           = "ar6003 hw 2.1.1",
  66                 .dataset_patch_addr             = 0x57ff74,
  67                 .app_load_addr                  = 0x1234,
  68                 .board_ext_data_addr            = 0x542330,
  69                 .reserved_ram_size              = 512,
  70                 .refclk_hz                      = 26000000,
  71                 .uarttx_pin                     = 8,
  72                 .testscript_addr                = 0x57ef74,
  73
  74                 .fw = {
  75                         .dir            = AR6003_HW_2_1_1_FW_DIR,
  76                         .otp            = AR6003_HW_2_1_1_OTP_FILE,
  77                         .fw             = AR6003_HW_2_1_1_FIRMWARE_FILE,
  78                         .tcmd           = AR6003_HW_2_1_1_TCMD_FIRMWARE_FILE,
  79                         .patch          = AR6003_HW_2_1_1_PATCH_FILE,
  80                         .utf            = AR6003_HW_2_1_1_UTF_FIRMWARE_FILE,
  81                         .testscript     = AR6003_HW_2_1_1_TESTSCRIPT_FILE,
  82                 },
  83
  84                 .fw_board               = AR6003_HW_2_1_1_BOARD_DATA_FILE,
  85                 .fw_default_board       = AR6003_HW_2_1_1_DEFAULT_BOARD_DATA_FILE,
  86         },
  87         {
  88                 .id                             = AR6004_HW_1_0_VERSION,
  89                 .name                           = "ar6004 hw 1.0",
  90                 .dataset_patch_addr             = 0x57e884,
  91                 .app_load_addr                  = 0x1234,
  92                 .board_ext_data_addr            = 0x437000,
  93                 .reserved_ram_size              = 19456,
  94                 .board_addr                     = 0x433900,
  95                 .refclk_hz                      = 26000000,
  96                 .uarttx_pin                     = 11,
  97
  98                 .fw = {
  99                         .dir            = AR6004_HW_1_0_FW_DIR,
 100                         .fw             = AR6004_HW_1_0_FIRMWARE_FILE,
 101                 },
 102
 103                 .fw_board               = AR6004_HW_1_0_BOARD_DATA_FILE,
 104                 .fw_default_board       = AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE,
 105         },
 106         {
 107                 .id                             = AR6004_HW_1_1_VERSION,
 108                 .name                           = "ar6004 hw 1.1",
 109                 .dataset_patch_addr             = 0x57e884,
 110                 .app_load_addr                  = 0x1234,
 111                 .board_ext_data_addr            = 0x437000,
 112                 .reserved_ram_size              = 11264,
 113                 .board_addr                     = 0x43d400,
 114                 .refclk_hz                      = 40000000,
 115                 .uarttx_pin                     = 11,
 116
 117                 .fw = {
 118                         .dir            = AR6004_HW_1_1_FW_DIR,
 119                         .fw             = AR6004_HW_1_1_FIRMWARE_FILE,
 120                 },
 121
 122                 .fw_board               = AR6004_HW_1_1_BOARD_DATA_FILE,
 123                 .fw_default_board       = AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE,
 124         },
 125 };
 126
 127 /*
 128  * Include definitions here that can be used to tune the WLAN module
 129  * behavior. Different customers can tune the behavior as per their needs,
 130  * here.
 131  */
 132
 133 /*
 134  * This configuration item enable/disable keepalive support.
 135  * Keepalive support: In the absence of any data traffic to AP, null
 136  * frames will be sent to the AP at periodic interval, to keep the association
 137  * active. This configuration item defines the periodic interval.
 138  * Use value of zero to disable keepalive support
 139  * Default: 60 seconds
 140  */
 141 #define WLAN_CONFIG_KEEP_ALIVE_INTERVAL 60
 142
 143 /*
 144  * This configuration item sets the value of disconnect timeout
 145  * Firmware delays sending the disconnec event to the host for this
 146  * timeout after is gets disconnected from the current AP.
 147  * If the firmware successly roams within the disconnect timeout
 148  * it sends a new connect event
 149  */
 150 #define WLAN_CONFIG_DISCONNECT_TIMEOUT 10
 151
 152
 153 #define ATH6KL_DATA_OFFSET    64
 154 struct sk_buff *ath6kl_buf_alloc(int size)
 155 {
 156         struct sk_buff *skb;
 157         u16 reserved;
 158
 159         /* Add chacheline space at front and back of buffer */
 160         reserved = (2 * L1_CACHE_BYTES) + ATH6KL_DATA_OFFSET +
 161                    sizeof(struct htc_packet) + ATH6KL_HTC_ALIGN_BYTES;
 162         skb = dev_alloc_skb(size + reserved);
 163
 164         if (skb)
 165                 skb_reserve(skb, reserved - L1_CACHE_BYTES);
 166         return skb;
 167 }
 168
 169 void ath6kl_init_profile_info(struct ath6kl_vif *vif)
 170 {
 171         vif->ssid_len = 0;
 172         memset(vif->ssid, 0, sizeof(vif->ssid));
 173
 174         vif->dot11_auth_mode = OPEN_AUTH;
 175         vif->auth_mode = NONE_AUTH;
 176         vif->prwise_crypto = NONE_CRYPT;
 177         vif->prwise_crypto_len = 0;
 178         vif->grp_crypto = NONE_CRYPT;
 179         vif->grp_crypto_len = 0;
 180         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
 181         memset(vif->req_bssid, 0, sizeof(vif->req_bssid));
 182         memset(vif->bssid, 0, sizeof(vif->bssid));
 183         vif->bss_ch = 0;
 184 }
 185
 186 static int ath6kl_set_host_app_area(struct ath6kl *ar)
 187 {
 188         u32 address, data;
 189         struct host_app_area host_app_area;
 190
 191         /* Fetch the address of the host_app_area_s
 192          * instance in the host interest area */
 193         address = ath6kl_get_hi_item_addr(ar, HI_ITEM(hi_app_host_interest));
 194         address = TARG_VTOP(ar->target_type, address);
 195
 196         if (ath6kl_diag_read32(ar, address, &data))
 197                 return -EIO;
 198
 199         address = TARG_VTOP(ar->target_type, data);
 200         host_app_area.wmi_protocol_ver = cpu_to_le32(WMI_PROTOCOL_VERSION);
 201         if (ath6kl_diag_write(ar, address, (u8 *) &host_app_area,
 202                               sizeof(struct host_app_area)))
 203                 return -EIO;
 204
 205         return 0;
 206 }
 207
 208 static inline void set_ac2_ep_map(struct ath6kl *ar,
 209                                   u8 ac,
 210                                   enum htc_endpoint_id ep)
 211 {
 212         ar->ac2ep_map[ac] = ep;
 213         ar->ep2ac_map[ep] = ac;
 214 }
 215
 216 /* connect to a service */
 217 static int ath6kl_connectservice(struct ath6kl *ar,
 218                                  struct htc_service_connect_req  *con_req,
 219                                  char *desc)
 220 {
 221         int status;
 222         struct htc_service_connect_resp response;
 223
 224         memset(&response, 0, sizeof(response));
 225
 226         status = ath6kl_htc_conn_service(ar->htc_target, con_req, &response);
 227         if (status) {
 228                 ath6kl_err("failed to connect to %s service status:%d\n",
 229                            desc, status);
 230                 return status;
 231         }
 232
 233         switch (con_req->svc_id) {
 234         case WMI_CONTROL_SVC:
 235                 if (test_bit(WMI_ENABLED, &ar->flag))
 236                         ath6kl_wmi_set_control_ep(ar->wmi, response.endpoint);
 237                 ar->ctrl_ep = response.endpoint;
 238                 break;
 239         case WMI_DATA_BE_SVC:
 240                 set_ac2_ep_map(ar, WMM_AC_BE, response.endpoint);
 241                 break;
 242         case WMI_DATA_BK_SVC:
 243                 set_ac2_ep_map(ar, WMM_AC_BK, response.endpoint);
 244                 break;
 245         case WMI_DATA_VI_SVC:
 246                 set_ac2_ep_map(ar, WMM_AC_VI, response.endpoint);
 247                 break;
 248         case WMI_DATA_VO_SVC:
 249                 set_ac2_ep_map(ar, WMM_AC_VO, response.endpoint);
 250                 break;
 251         default:
 252                 ath6kl_err("service id is not mapped %d\n", con_req->svc_id);
 253                 return -EINVAL;
 254         }
 255
 256         return 0;
 257 }
 258
 259 static int ath6kl_init_service_ep(struct ath6kl *ar)
 260 {
 261         struct htc_service_connect_req connect;
 262
 263         memset(&connect, 0, sizeof(connect));
 264
 265         /* these fields are the same for all service endpoints */
 266         connect.ep_cb.rx = ath6kl_rx;
 267         connect.ep_cb.rx_refill = ath6kl_rx_refill;
 268         connect.ep_cb.tx_full = ath6kl_tx_queue_full;
 269
 270         /*
 271          * Set the max queue depth so that our ath6kl_tx_queue_full handler
 272          * gets called.
 273         */
 274         connect.max_txq_depth = MAX_DEFAULT_SEND_QUEUE_DEPTH;
 275         connect.ep_cb.rx_refill_thresh = ATH6KL_MAX_RX_BUFFERS / 4;
 276         if (!connect.ep_cb.rx_refill_thresh)
 277                 connect.ep_cb.rx_refill_thresh++;
 278
 279         /* connect to control service */
 280         connect.svc_id = WMI_CONTROL_SVC;
 281         if (ath6kl_connectservice(ar, &connect, "WMI CONTROL"))
 282                 return -EIO;
 283
 284         connect.flags |= HTC_FLGS_TX_BNDL_PAD_EN;
 285
 286         /*
 287          * Limit the HTC message size on the send path, although e can
 288          * receive A-MSDU frames of 4K, we will only send ethernet-sized
 289          * (802.3) frames on the send path.
 290          */
 291         connect.max_rxmsg_sz = WMI_MAX_TX_DATA_FRAME_LENGTH;
 292
 293         /*
 294          * To reduce the amount of committed memory for larger A_MSDU
 295          * frames, use the recv-alloc threshold mechanism for larger
 296          * packets.
 297          */
 298         connect.ep_cb.rx_alloc_thresh = ATH6KL_BUFFER_SIZE;
 299         connect.ep_cb.rx_allocthresh = ath6kl_alloc_amsdu_rxbuf;
 300
 301         /*
 302          * For the remaining data services set the connection flag to
 303          * reduce dribbling, if configured to do so.
 304          */
 305         connect.conn_flags |= HTC_CONN_FLGS_REDUCE_CRED_DRIB;
 306         connect.conn_flags &= ~HTC_CONN_FLGS_THRESH_MASK;
 307         connect.conn_flags |= HTC_CONN_FLGS_THRESH_LVL_HALF;
 308
 309         connect.svc_id = WMI_DATA_BE_SVC;
 310
 311         if (ath6kl_connectservice(ar, &connect, "WMI DATA BE"))
 312                 return -EIO;
 313
 314         /* connect to back-ground map this to WMI LOW_PRI */
 315         connect.svc_id = WMI_DATA_BK_SVC;
 316         if (ath6kl_connectservice(ar, &connect, "WMI DATA BK"))
 317                 return -EIO;
 318
 319         /* connect to Video service, map this to to HI PRI */
 320         connect.svc_id = WMI_DATA_VI_SVC;
 321         if (ath6kl_connectservice(ar, &connect, "WMI DATA VI"))
 322                 return -EIO;
 323
 324         /*
 325          * Connect to VO service, this is currently not mapped to a WMI
 326          * priority stream due to historical reasons. WMI originally
 327          * defined 3 priorities over 3 mailboxes We can change this when
 328          * WMI is reworked so that priorities are not dependent on
 329          * mailboxes.
 330          */
 331         connect.svc_id = WMI_DATA_VO_SVC;
 332         if (ath6kl_connectservice(ar, &connect, "WMI DATA VO"))
 333                 return -EIO;
 334
 335         return 0;
 336 }
 337
 338 void ath6kl_init_control_info(struct ath6kl_vif *vif)
 339 {
 340         ath6kl_init_profile_info(vif);
 341         vif->def_txkey_index = 0;
 342         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
 343         vif->ch_hint = 0;
 344 }
 345
 346 /*
 347  * Set HTC/Mbox operational parameters, this can only be called when the
 348  * target is in the BMI phase.
 349  */
 350 static int ath6kl_set_htc_params(struct ath6kl *ar, u32 mbox_isr_yield_val,
 351                                  u8 htc_ctrl_buf)
 352 {
 353         int status;
 354         u32 blk_size;
 355
 356         blk_size = ar->mbox_info.block_size;
 357
 358         if (htc_ctrl_buf)
 359                 blk_size |=  ((u32)htc_ctrl_buf) << 16;
 360
 361         /* set the host interest area for the block size */
 362         status = ath6kl_bmi_write(ar,
 363                         ath6kl_get_hi_item_addr(ar,
 364                         HI_ITEM(hi_mbox_io_block_sz)),
 365                         (u8 *)&blk_size,
 366                         4);
 367         if (status) {
 368                 ath6kl_err("bmi_write_memory for IO block size failed\n");
 369                 goto out;
 370         }
 371
 372         ath6kl_dbg(ATH6KL_DBG_TRC, "block size set: %d (target addr:0x%X)\n",
 373                    blk_size,
 374                    ath6kl_get_hi_item_addr(ar, HI_ITEM(hi_mbox_io_block_sz)));
 375
 376         if (mbox_isr_yield_val) {
 377                 /* set the host interest area for the mbox ISR yield limit */
 378                 status = ath6kl_bmi_write(ar,
 379                                 ath6kl_get_hi_item_addr(ar,
 380                                 HI_ITEM(hi_mbox_isr_yield_limit)),
 381                                 (u8 *)&mbox_isr_yield_val,
 382                                 4);
 383                 if (status) {
 384                         ath6kl_err("bmi_write_memory for yield limit failed\n");
 385                         goto out;
 386                 }
 387         }
 388
 389 out:
 390         return status;
 391 }
 392
 393 static int ath6kl_target_config_wlan_params(struct ath6kl *ar, int idx)
 394 {
 395         int status = 0;
 396         int ret;
 397
 398         /*
 399          * Configure the device for rx dot11 header rules. "0,0" are the
 400          * default values. Required if checksum offload is needed. Set
 401          * RxMetaVersion to 2.
 402          */
 403         if (ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi, idx,
 404                                                ar->rx_meta_ver, 0, 0)) {
 405                 ath6kl_err("unable to set the rx frame format\n");
 406                 status = -EIO;
 407         }
 408
 409         if (ar->conf_flags & ATH6KL_CONF_IGNORE_PS_FAIL_EVT_IN_SCAN)
 410                 if ((ath6kl_wmi_pmparams_cmd(ar->wmi, idx, 0, 1, 0, 0, 1,
 411                      IGNORE_POWER_SAVE_FAIL_EVENT_DURING_SCAN)) != 0) {
 412                         ath6kl_err("unable to set power save fail event policy\n");
 413                         status = -EIO;
 414                 }
 415
 416         if (!(ar->conf_flags & ATH6KL_CONF_IGNORE_ERP_BARKER))
 417                 if ((ath6kl_wmi_set_lpreamble_cmd(ar->wmi, idx, 0,
 418                      WMI_DONOT_IGNORE_BARKER_IN_ERP)) != 0) {
 419                         ath6kl_err("unable to set barker preamble policy\n");
 420                         status = -EIO;
 421                 }
 422
 423         if (ath6kl_wmi_set_keepalive_cmd(ar->wmi, idx,
 424                         WLAN_CONFIG_KEEP_ALIVE_INTERVAL)) {
 425                 ath6kl_err("unable to set keep alive interval\n");
 426                 status = -EIO;
 427         }
 428
 429         if (ath6kl_wmi_disctimeout_cmd(ar->wmi, idx,
 430                         WLAN_CONFIG_DISCONNECT_TIMEOUT)) {
 431                 ath6kl_err("unable to set disconnect timeout\n");
 432                 status = -EIO;
 433         }
 434
 435         if (!(ar->conf_flags & ATH6KL_CONF_ENABLE_TX_BURST))
 436                 if (ath6kl_wmi_set_wmm_txop(ar->wmi, idx, WMI_TXOP_DISABLED)) {
 437                         ath6kl_err("unable to set txop bursting\n");
 438                         status = -EIO;
 439                 }
 440
 441         if (ar->p2p && (ar->vif_max == 1 || idx)) {
 442                 ret = ath6kl_wmi_info_req_cmd(ar->wmi, idx,
 443                                               P2P_FLAG_CAPABILITIES_REQ |
 444                                               P2P_FLAG_MACADDR_REQ |
 445                                               P2P_FLAG_HMODEL_REQ);
 446                 if (ret) {
 447                         ath6kl_dbg(ATH6KL_DBG_TRC, "failed to request P2P "
 448                                    "capabilities (%d) - assuming P2P not "
 449                                    "supported\n", ret);
 450                         ar->p2p = false;
 451                 }
 452         }
 453
 454         if (ar->p2p && (ar->vif_max == 1 || idx)) {
 455                 /* Enable Probe Request reporting for P2P */
 456                 ret = ath6kl_wmi_probe_report_req_cmd(ar->wmi, idx, true);
 457                 if (ret) {
 458                         ath6kl_dbg(ATH6KL_DBG_TRC, "failed to enable Probe "
 459                                    "Request reporting (%d)\n", ret);
 460                 }
 461         }
 462
 463         return status;
 464 }
 465
 466 int ath6kl_configure_target(struct ath6kl *ar)
 467 {
 468         u32 param, ram_reserved_size;
 469         u8 fw_iftype, fw_mode = 0, fw_submode = 0;
 470         int i, status;
 471
 472         param = uart_debug;
 473         if (ath6kl_bmi_write(ar, ath6kl_get_hi_item_addr(ar,
 474                              HI_ITEM(hi_serial_enable)), (u8 *)&param, 4)) {
 475                 ath6kl_err("bmi_write_memory for uart debug failed\n");
 476                 return -EIO;
 477         }
 478
 479         /*
 480          * Note: Even though the firmware interface type is
 481          * chosen as BSS_STA for all three interfaces, can
 482          * be configured to IBSS/AP as long as the fw submode
 483          * remains normal mode (0 - AP, STA and IBSS). But
 484          * due to an target assert in firmware only one interface is
 485          * configured for now.
 486          */
 487         fw_iftype = HI_OPTION_FW_MODE_BSS_STA;
 488
 489         for (i = 0; i < ar->vif_max; i++)
 490                 fw_mode |= fw_iftype << (i * HI_OPTION_FW_MODE_BITS);
 491
 492         /*
 493          * By default, submodes :
 494          *              vif[0] - AP/STA/IBSS
 495          *              vif[1] - "P2P dev"/"P2P GO"/"P2P Client"
 496          *              vif[2] - "P2P dev"/"P2P GO"/"P2P Client"
 497          */
 498
 499         for (i = 0; i < ar->max_norm_iface; i++)
 500                 fw_submode |= HI_OPTION_FW_SUBMODE_NONE <<
 501                               (i * HI_OPTION_FW_SUBMODE_BITS);
 502
 503         for (i = ar->max_norm_iface; i < ar->vif_max; i++)
 504                 fw_submode |= HI_OPTION_FW_SUBMODE_P2PDEV <<
 505                               (i * HI_OPTION_FW_SUBMODE_BITS);
 506
 507         if (ar->p2p && ar->vif_max == 1)
 508                 fw_submode = HI_OPTION_FW_SUBMODE_P2PDEV;
 509
 510         param = HTC_PROTOCOL_VERSION;
 511         if (ath6kl_bmi_write(ar,
 512                              ath6kl_get_hi_item_addr(ar,
 513                              HI_ITEM(hi_app_host_interest)),
 514                              (u8 *)&param, 4) != 0) {
 515                 ath6kl_err("bmi_write_memory for htc version failed\n");
 516                 return -EIO;
 517         }
 518
 519         /* set the firmware mode to STA/IBSS/AP */
 520         param = 0;
 521
 522         if (ath6kl_bmi_read(ar,
 523                             ath6kl_get_hi_item_addr(ar,
 524                             HI_ITEM(hi_option_flag)),
 525                             (u8 *)&param, 4) != 0) {
 526                 ath6kl_err("bmi_read_memory for setting fwmode failed\n");
 527                 return -EIO;
 528         }
 529
 530         param |= (ar->vif_max << HI_OPTION_NUM_DEV_SHIFT);
 531         param |= fw_mode << HI_OPTION_FW_MODE_SHIFT;
 532         param |= fw_submode << HI_OPTION_FW_SUBMODE_SHIFT;
 533
 534         param |= (0 << HI_OPTION_MAC_ADDR_METHOD_SHIFT);
 535         param |= (0 << HI_OPTION_FW_BRIDGE_SHIFT);
 536
 537         if (ath6kl_bmi_write(ar,
 538                              ath6kl_get_hi_item_addr(ar,
 539                              HI_ITEM(hi_option_flag)),
 540                              (u8 *)&param,
 541                              4) != 0) {
 542                 ath6kl_err("bmi_write_memory for setting fwmode failed\n");
 543                 return -EIO;
 544         }
 545
 546         ath6kl_dbg(ATH6KL_DBG_TRC, "firmware mode set\n");
 547
 548         /*
 549          * Hardcode the address use for the extended board data
 550          * Ideally this should be pre-allocate by the OS at boot time
 551          * But since it is a new feature and board data is loaded
 552          * at init time, we have to workaround this from host.
 553          * It is difficult to patch the firmware boot code,
 554          * but possible in theory.
 555          */
 556
 557         param = ar->hw.board_ext_data_addr;
 558         ram_reserved_size = ar->hw.reserved_ram_size;
 559
 560         if (ath6kl_bmi_write(ar, ath6kl_get_hi_item_addr(ar,
 561                                         HI_ITEM(hi_board_ext_data)),
 562                              (u8 *)&param, 4) != 0) {
 563                 ath6kl_err("bmi_write_memory for hi_board_ext_data failed\n");
 564                 return -EIO;
 565         }
 566
 567         if (ath6kl_bmi_write(ar, ath6kl_get_hi_item_addr(ar,
 568                                         HI_ITEM(hi_end_ram_reserve_sz)),
 569                              (u8 *)&ram_reserved_size, 4) != 0) {
 570                 ath6kl_err("bmi_write_memory for hi_end_ram_reserve_sz failed\n");
 571                 return -EIO;
 572         }
 573
 574         /* set the block size for the target */
 575         if (ath6kl_set_htc_params(ar, MBOX_YIELD_LIMIT, 0))
 576                 /* use default number of control buffers */
 577                 return -EIO;
 578
 579         /* Configure GPIO AR600x UART */
 580         param = ar->hw.uarttx_pin;
 581         status = ath6kl_bmi_write(ar,
 582                                 ath6kl_get_hi_item_addr(ar,
 583                                 HI_ITEM(hi_dbg_uart_txpin)),
 584                                 (u8 *)&param, 4);
 585         if (status)
 586                 return status;
 587
 588         /* Configure target refclk_hz */
 589         param =  ar->hw.refclk_hz;
 590         status = ath6kl_bmi_write(ar,
 591                                 ath6kl_get_hi_item_addr(ar,
 592                                 HI_ITEM(hi_refclk_hz)),
 593                                 (u8 *)&param, 4);
 594         if (status)
 595                 return status;
 596
 597         return 0;
 598 }
 599
 600 void ath6kl_core_free(struct ath6kl *ar)
 601 {
 602         wiphy_free(ar->wiphy);
 603 }
 604
 605 void ath6kl_core_cleanup(struct ath6kl *ar)
 606 {
 607         ath6kl_hif_power_off(ar);
 608
 609         destroy_workqueue(ar->ath6kl_wq);
 610
 611         if (ar->htc_target)
 612                 ath6kl_htc_cleanup(ar->htc_target);
 613
 614         ath6kl_cookie_cleanup(ar);
 615
 616         ath6kl_cleanup_amsdu_rxbufs(ar);
 617
 618         ath6kl_bmi_cleanup(ar);
 619
 620         ath6kl_debug_cleanup(ar);
 621
 622         kfree(ar->fw_board);
 623         kfree(ar->fw_otp);
 624         kfree(ar->fw);
 625         kfree(ar->fw_patch);
 626         kfree(ar->fw_testscript);
 627
 628         ath6kl_deinit_ieee80211_hw(ar);
 629 }
 630
 631 /* firmware upload */
 632 static int ath6kl_get_fw(struct ath6kl *ar, const char *filename,
 633                          u8 **fw, size_t *fw_len)
 634 {
 635         const struct firmware *fw_entry;
 636         int ret;
 637
 638         ret = request_firmware(&fw_entry, filename, ar->dev);
 639         if (ret)
 640                 return ret;
 641
 642         *fw_len = fw_entry->size;
 643         *fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
 644
 645         if (*fw == NULL)
 646                 ret = -ENOMEM;
 647
 648         release_firmware(fw_entry);
 649
 650         return ret;
 651 }
 652
 653 #ifdef CONFIG_OF
 654 /*
 655  * Check the device tree for a board-id and use it to construct
 656  * the pathname to the firmware file.  Used (for now) to find a
 657  * fallback to the "bdata.bin" file--typically a symlink to the
 658  * appropriate board-specific file.
 659  */
 660 static bool check_device_tree(struct ath6kl *ar)
 661 {
 662         static const char *board_id_prop = "atheros,board-id";
 663         struct device_node *node;
 664         char board_filename[64];
 665         const char *board_id;
 666         int ret;
 667
 668         for_each_compatible_node(node, NULL, "atheros,ath6kl") {
 669                 board_id = of_get_property(node, board_id_prop, NULL);
 670                 if (board_id == NULL) {
 671                         ath6kl_warn("No \"%s\" property on %s node.\n",
 672                                     board_id_prop, node->name);
 673                         continue;
 674                 }
 675                 snprintf(board_filename, sizeof(board_filename),
 676                          "%s/bdata.%s.bin", ar->hw.fw.dir, board_id);
 677
 678                 ret = ath6kl_get_fw(ar, board_filename, &ar->fw_board,
 679                                     &ar->fw_board_len);
 680                 if (ret) {
 681                         ath6kl_err("Failed to get DT board file %s: %d\n",
 682                                    board_filename, ret);
 683                         continue;
 684                 }
 685                 return true;
 686         }
 687         return false;
 688 }
 689 #else
 690 static bool check_device_tree(struct ath6kl *ar)
 691 {
 692         return false;
 693 }
 694 #endif /* CONFIG_OF */
 695
 696 static int ath6kl_fetch_board_file(struct ath6kl *ar)
 697 {
 698         const char *filename;
 699         int ret;
 700
 701         if (ar->fw_board != NULL)
 702                 return 0;
 703
 704         if (WARN_ON(ar->hw.fw_board == NULL))
 705                 return -EINVAL;
 706
 707         filename = ar->hw.fw_board;
 708
 709         ret = ath6kl_get_fw(ar, filename, &ar->fw_board,
 710                             &ar->fw_board_len);
 711         if (ret == 0) {
 712                 /* managed to get proper board file */
 713                 return 0;
 714         }
 715
 716         if (check_device_tree(ar)) {
 717                 /* got board file from device tree */
 718                 return 0;
 719         }
 720
 721         /* there was no proper board file, try to use default instead */
 722         ath6kl_warn("Failed to get board file %s (%d), trying to find default board file.\n",
 723                     filename, ret);
 724
 725         filename = ar->hw.fw_default_board;
 726
 727         ret = ath6kl_get_fw(ar, filename, &ar->fw_board,
 728                             &ar->fw_board_len);
 729         if (ret) {
 730                 ath6kl_err("Failed to get default board file %s: %d\n",
 731                            filename, ret);
 732                 return ret;
 733         }
 734
 735         ath6kl_warn("WARNING! No proper board file was not found, instead using a default board file.\n");
 736         ath6kl_warn("Most likely your hardware won't work as specified. Install correct board file!\n");
 737
 738         return 0;
 739 }
 740
 741 static int ath6kl_fetch_otp_file(struct ath6kl *ar)
 742 {
 743         char filename[100];
 744         int ret;
 745
 746         if (ar->fw_otp != NULL)
 747                 return 0;
 748
 749         if (ar->hw.fw.otp == NULL) {
 750                 ath6kl_dbg(ATH6KL_DBG_BOOT,
 751                            "no OTP file configured for this hw\n");
 752                 return 0;
 753         }
 754
 755         snprintf(filename, sizeof(filename), "%s/%s",
 756                  ar->hw.fw.dir, ar->hw.fw.otp);
 757
 758         ret = ath6kl_get_fw(ar, filename, &ar->fw_otp,
 759                             &ar->fw_otp_len);
 760         if (ret) {
 761                 ath6kl_err("Failed to get OTP file %s: %d\n",
 762                            filename, ret);
 763                 return ret;
 764         }
 765
 766         return 0;
 767 }
 768
 769 static int ath6kl_fetch_fw_file(struct ath6kl *ar)
 770 {
 771         char filename[100];
 772         int ret;
 773
 774         if (ar->fw != NULL)
 775                 return 0;
 776
 777         if (testmode) {
 778                 ath6kl_dbg(ATH6KL_DBG_BOOT, "testmode %d\n",
 779                                 testmode);
 780                 if (testmode == 2) {
 781                         if (ar->hw.fw.utf == NULL) {
 782                                 ath6kl_warn("testmode 2 not supported\n");
 783                                 return -EOPNOTSUPP;
 784                         }
 785
 786                         snprintf(filename, sizeof(filename), "%s/%s",
 787                                 ar->hw.fw.dir, ar->hw.fw.utf);
 788                 } else {
 789                         if (ar->hw.fw.tcmd == NULL) {
 790                                 ath6kl_warn("testmode 1 not supported\n");
 791                                 return -EOPNOTSUPP;
 792                         }
 793
 794                         snprintf(filename, sizeof(filename), "%s/%s",
 795                                 ar->hw.fw.dir, ar->hw.fw.tcmd);
 796                 }
 797                 set_bit(TESTMODE, &ar->flag);
 798
 799                 goto get_fw;
 800         }
 801
 802         /* FIXME: remove WARN_ON() as we won't support FW API 1 for long */
 803         if (WARN_ON(ar->hw.fw.fw == NULL))
 804                 return -EINVAL;
 805
 806         snprintf(filename, sizeof(filename), "%s/%s",
 807                  ar->hw.fw.dir, ar->hw.fw.fw);
 808
 809 get_fw:
 810         ret = ath6kl_get_fw(ar, filename, &ar->fw, &ar->fw_len);
 811         if (ret) {
 812                 ath6kl_err("Failed to get firmware file %s: %d\n",
 813                            filename, ret);
 814                 return ret;
 815         }
 816
 817         return 0;
 818 }
 819
 820 static int ath6kl_fetch_patch_file(struct ath6kl *ar)
 821 {
 822         char filename[100];
 823         int ret;
 824
 825         if (ar->fw_patch != NULL)
 826                 return 0;
 827
 828         if (ar->hw.fw.patch == NULL)
 829                 return 0;
 830
 831         snprintf(filename, sizeof(filename), "%s/%s",
 832                  ar->hw.fw.dir, ar->hw.fw.patch);
 833
 834         ret = ath6kl_get_fw(ar, filename, &ar->fw_patch,
 835                             &ar->fw_patch_len);
 836         if (ret) {
 837                 ath6kl_err("Failed to get patch file %s: %d\n",
 838                            filename, ret);
 839                 return ret;
 840         }
 841
 842         return 0;
 843 }
 844
 845 static int ath6kl_fetch_testscript_file(struct ath6kl *ar)
 846 {
 847         char filename[100];
 848         int ret;
 849
 850         if (testmode != 2)
 851                 return 0;
 852
 853         if (ar->fw_testscript != NULL)
 854                 return 0;
 855
 856         if (ar->hw.fw.testscript == NULL)
 857                 return 0;
 858
 859         snprintf(filename, sizeof(filename), "%s/%s",
 860                 ar->hw.fw.dir, ar->hw.fw.testscript);
 861
 862         ret = ath6kl_get_fw(ar, filename, &ar->fw_testscript,
 863                                 &ar->fw_testscript_len);
 864         if (ret) {
 865                 ath6kl_err("Failed to get testscript file %s: %d\n",
 866                         filename, ret);
 867                 return ret;
 868         }
 869
 870         return 0;
 871 }
 872
 873 static int ath6kl_fetch_fw_api1(struct ath6kl *ar)
 874 {
 875         int ret;
 876
 877         ret = ath6kl_fetch_otp_file(ar);
 878         if (ret)
 879                 return ret;
 880
 881         ret = ath6kl_fetch_fw_file(ar);
 882         if (ret)
 883                 return ret;
 884
 885         ret = ath6kl_fetch_patch_file(ar);
 886         if (ret)
 887                 return ret;
 888
 889         ret = ath6kl_fetch_testscript_file(ar);
 890         if (ret)
 891                 return ret;
 892
 893         return 0;
 894 }
 895
 896 static int ath6kl_fetch_fw_apin(struct ath6kl *ar, const char *name)
 897 {
 898         size_t magic_len, len, ie_len;
 899         const struct firmware *fw;
 900         struct ath6kl_fw_ie *hdr;
 901         char filename[100];
 902         const u8 *data;
 903         int ret, ie_id, i, index, bit;
 904         __le32 *val;
 905
 906         snprintf(filename, sizeof(filename), "%s/%s", ar->hw.fw.dir, name);
 907
 908         ret = request_firmware(&fw, filename, ar->dev);
 909         if (ret)
 910                 return ret;
 911
 912         data = fw->data;
 913         len = fw->size;
 914
 915         /* magic also includes the null byte, check that as well */
 916         magic_len = strlen(ATH6KL_FIRMWARE_MAGIC) + 1;
 917
 918         if (len < magic_len) {
 919                 ret = -EINVAL;
 920                 goto out;
 921         }
 922
 923         if (memcmp(data, ATH6KL_FIRMWARE_MAGIC, magic_len) != 0) {
 924                 ret = -EINVAL;
 925                 goto out;
 926         }
 927
 928         len -= magic_len;
 929         data += magic_len;
 930
 931         /* loop elements */
 932         while (len > sizeof(struct ath6kl_fw_ie)) {
 933                 /* hdr is unaligned! */
 934                 hdr = (struct ath6kl_fw_ie *) data;
 935
 936                 ie_id = le32_to_cpup(&hdr->id);
 937                 ie_len = le32_to_cpup(&hdr->len);
 938
 939                 len -= sizeof(*hdr);
 940                 data += sizeof(*hdr);
 941
 942                 if (len < ie_len) {
 943                         ret = -EINVAL;
 944                         goto out;
 945                 }
 946
 947                 switch (ie_id) {
 948                 case ATH6KL_FW_IE_OTP_IMAGE:
 949                         ath6kl_dbg(ATH6KL_DBG_BOOT, "found otp image ie (%zd B)\n",
 950                                 ie_len);
 951
 952                         ar->fw_otp = kmemdup(data, ie_len, GFP_KERNEL);
 953
 954                         if (ar->fw_otp == NULL) {
 955                                 ret = -ENOMEM;
 956                                 goto out;
 957                         }
 958
 959                         ar->fw_otp_len = ie_len;
 960                         break;
 961                 case ATH6KL_FW_IE_FW_IMAGE:
 962                         ath6kl_dbg(ATH6KL_DBG_BOOT, "found fw image ie (%zd B)\n",
 963                                 ie_len);
 964
 965                         ar->fw = kmemdup(data, ie_len, GFP_KERNEL);
 966
 967                         if (ar->fw == NULL) {
 968                                 ret = -ENOMEM;
 969                                 goto out;
 970                         }
 971
 972                         ar->fw_len = ie_len;
 973                         break;
 974                 case ATH6KL_FW_IE_PATCH_IMAGE:
 975                         ath6kl_dbg(ATH6KL_DBG_BOOT, "found patch image ie (%zd B)\n",
 976                                 ie_len);
 977
 978                         ar->fw_patch = kmemdup(data, ie_len, GFP_KERNEL);
 979
 980                         if (ar->fw_patch == NULL) {
 981                                 ret = -ENOMEM;
 982                                 goto out;
 983                         }
 984
 985                         ar->fw_patch_len = ie_len;
 986                         break;
 987                 case ATH6KL_FW_IE_RESERVED_RAM_SIZE:
 988                         val = (__le32 *) data;
 989                         ar->hw.reserved_ram_size = le32_to_cpup(val);
 990
 991                         ath6kl_dbg(ATH6KL_DBG_BOOT,
 992                                    "found reserved ram size ie 0x%d\n",
 993                                    ar->hw.reserved_ram_size);
 994                         break;
 995                 case ATH6KL_FW_IE_CAPABILITIES:
 996                         if (ie_len < DIV_ROUND_UP(ATH6KL_FW_CAPABILITY_MAX, 8))
 997                                 break;
 998
 999                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1000                                    "found firmware capabilities ie (%zd B)\n",
1001                                    ie_len);
1002
1003                         for (i = 0; i < ATH6KL_FW_CAPABILITY_MAX; i++) {
1004                                 index = i / 8;
1005                                 bit = i % 8;
1006
1007                                 if (data[index] & (1 << bit))
1008                                         __set_bit(i, ar->fw_capabilities);
1009                         }
1010
1011                         ath6kl_dbg_dump(ATH6KL_DBG_BOOT, "capabilities", "",
1012                                         ar->fw_capabilities,
1013                                         sizeof(ar->fw_capabilities));
1014                         break;
1015                 case ATH6KL_FW_IE_PATCH_ADDR:
1016                         if (ie_len != sizeof(*val))
1017                                 break;
1018
1019                         val = (__le32 *) data;
1020                         ar->hw.dataset_patch_addr = le32_to_cpup(val);
1021
1022                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1023                                    "found patch address ie 0x%x\n",
1024                                    ar->hw.dataset_patch_addr);
1025                         break;
1026                 case ATH6KL_FW_IE_BOARD_ADDR:
1027                         if (ie_len != sizeof(*val))
1028                                 break;
1029
1030                         val = (__le32 *) data;
1031                         ar->hw.board_addr = le32_to_cpup(val);
1032
1033                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1034                                    "found board address ie 0x%x\n",
1035                                    ar->hw.board_addr);
1036                         break;
1037                 case ATH6KL_FW_IE_VIF_MAX:
1038                         if (ie_len != sizeof(*val))
1039                                 break;
1040
1041                         val = (__le32 *) data;
1042                         ar->vif_max = min_t(unsigned int, le32_to_cpup(val),
1043                                             ATH6KL_VIF_MAX);
1044
1045                         if (ar->vif_max > 1 && !ar->p2p)
1046                                 ar->max_norm_iface = 2;
1047
1048                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1049                                    "found vif max ie %d\n", ar->vif_max);
1050                         break;
1051                 default:
1052                         ath6kl_dbg(ATH6KL_DBG_BOOT, "Unknown fw ie: %u\n",
1053                                    le32_to_cpup(&hdr->id));
1054                         break;
1055                 }
1056
1057                 len -= ie_len;
1058                 data += ie_len;
1059         };
1060
1061         ret = 0;
1062 out:
1063         release_firmware(fw);
1064
1065         return ret;
1066 }
1067
1068 static int ath6kl_fetch_firmwares(struct ath6kl *ar)
1069 {
1070         int ret;
1071
1072         ret = ath6kl_fetch_board_file(ar);
1073         if (ret)
1074                 return ret;
1075
1076         ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API3_FILE);
1077         if (ret == 0) {
1078                 ar->fw_api = 3;
1079                 goto out;
1080         }
1081
1082         ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API2_FILE);
1083         if (ret == 0) {
1084                 ar->fw_api = 2;
1085                 goto out;
1086         }
1087
1088         ret = ath6kl_fetch_fw_api1(ar);
1089         if (ret)
1090                 return ret;
1091
1092         ar->fw_api = 1;
1093
1094 out:
1095         ath6kl_dbg(ATH6KL_DBG_BOOT, "using fw api %d\n", ar->fw_api);
1096
1097         return 0;
1098 }
1099
1100 static int ath6kl_upload_board_file(struct ath6kl *ar)
1101 {
1102         u32 board_address, board_ext_address, param;
1103         u32 board_data_size, board_ext_data_size;
1104         int ret;
1105
1106         if (WARN_ON(ar->fw_board == NULL))
1107                 return -ENOENT;
1108
1109         /*
1110          * Determine where in Target RAM to write Board Data.
1111          * For AR6004, host determine Target RAM address for
1112          * writing board data.
1113          */
1114         if (ar->hw.board_addr != 0) {
1115                 board_address = ar->hw.board_addr;
1116                 ath6kl_bmi_write(ar,
1117                                 ath6kl_get_hi_item_addr(ar,
1118                                 HI_ITEM(hi_board_data)),
1119                                 (u8 *) &board_address, 4);
1120         } else {
1121                 ath6kl_bmi_read(ar,
1122                                 ath6kl_get_hi_item_addr(ar,
1123                                 HI_ITEM(hi_board_data)),
1124                                 (u8 *) &board_address, 4);
1125         }
1126
1127         /* determine where in target ram to write extended board data */
1128         ath6kl_bmi_read(ar,
1129                         ath6kl_get_hi_item_addr(ar,
1130                         HI_ITEM(hi_board_ext_data)),
1131                         (u8 *) &board_ext_address, 4);
1132
1133         if (ar->target_type == TARGET_TYPE_AR6003 &&
1134             board_ext_address == 0) {
1135                 ath6kl_err("Failed to get board file target address.\n");
1136                 return -EINVAL;
1137         }
1138
1139         switch (ar->target_type) {
1140         case TARGET_TYPE_AR6003:
1141                 board_data_size = AR6003_BOARD_DATA_SZ;
1142                 board_ext_data_size = AR6003_BOARD_EXT_DATA_SZ;
1143                 break;
1144         case TARGET_TYPE_AR6004:
1145                 board_data_size = AR6004_BOARD_DATA_SZ;
1146                 board_ext_data_size = AR6004_BOARD_EXT_DATA_SZ;
1147                 break;
1148         default:
1149                 WARN_ON(1);
1150                 return -EINVAL;
1151                 break;
1152         }
1153
1154         if (board_ext_address &&
1155             ar->fw_board_len == (board_data_size + board_ext_data_size)) {
1156
1157                 /* write extended board data */
1158                 ath6kl_dbg(ATH6KL_DBG_BOOT,
1159                            "writing extended board data to 0x%x (%d B)\n",
1160                            board_ext_address, board_ext_data_size);
1161
1162                 ret = ath6kl_bmi_write(ar, board_ext_address,
1163                                        ar->fw_board + board_data_size,
1164                                        board_ext_data_size);
1165                 if (ret) {
1166                         ath6kl_err("Failed to write extended board data: %d\n",
1167                                    ret);
1168                         return ret;
1169                 }
1170
1171                 /* record that extended board data is initialized */
1172                 param = (board_ext_data_size << 16) | 1;
1173
1174                 ath6kl_bmi_write(ar,
1175                                  ath6kl_get_hi_item_addr(ar,
1176                                  HI_ITEM(hi_board_ext_data_config)),
1177                                  (unsigned char *) &param, 4);
1178         }
1179
1180         if (ar->fw_board_len < board_data_size) {
1181                 ath6kl_err("Too small board file: %zu\n", ar->fw_board_len);
1182                 ret = -EINVAL;
1183                 return ret;
1184         }
1185
1186         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing board file to 0x%x (%d B)\n",
1187                    board_address, board_data_size);
1188
1189         ret = ath6kl_bmi_write(ar, board_address, ar->fw_board,
1190                                board_data_size);
1191
1192         if (ret) {
1193                 ath6kl_err("Board file bmi write failed: %d\n", ret);
1194                 return ret;
1195         }
1196
1197         /* record the fact that Board Data IS initialized */
1198         param = 1;
1199         ath6kl_bmi_write(ar,
1200                          ath6kl_get_hi_item_addr(ar,
1201                          HI_ITEM(hi_board_data_initialized)),
1202                          (u8 *)&param, 4);
1203
1204         return ret;
1205 }
1206
1207 static int ath6kl_upload_otp(struct ath6kl *ar)
1208 {
1209         u32 address, param;
1210         bool from_hw = false;
1211         int ret;
1212
1213         if (ar->fw_otp == NULL)
1214                 return 0;
1215
1216         address = ar->hw.app_load_addr;
1217
1218         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing otp to 0x%x (%zd B)\n", address,
1219                    ar->fw_otp_len);
1220
1221         ret = ath6kl_bmi_fast_download(ar, address, ar->fw_otp,
1222                                        ar->fw_otp_len);
1223         if (ret) {
1224                 ath6kl_err("Failed to upload OTP file: %d\n", ret);
1225                 return ret;
1226         }
1227
1228         /* read firmware start address */
1229         ret = ath6kl_bmi_read(ar,
1230                               ath6kl_get_hi_item_addr(ar,
1231                                                       HI_ITEM(hi_app_start)),
1232                               (u8 *) &address, sizeof(address));
1233
1234         if (ret) {
1235                 ath6kl_err("Failed to read hi_app_start: %d\n", ret);
1236                 return ret;
1237         }
1238
1239         if (ar->hw.app_start_override_addr == 0) {
1240                 ar->hw.app_start_override_addr = address;
1241                 from_hw = true;
1242         }
1243
1244         ath6kl_dbg(ATH6KL_DBG_BOOT, "app_start_override_addr%s 0x%x\n",
1245                    from_hw ? " (from hw)" : "",
1246                    ar->hw.app_start_override_addr);
1247
1248         /* execute the OTP code */
1249         ath6kl_dbg(ATH6KL_DBG_BOOT, "executing OTP at 0x%x\n",
1250                    ar->hw.app_start_override_addr);
1251         param = 0;
1252         ath6kl_bmi_execute(ar, ar->hw.app_start_override_addr, &param);
1253
1254         return ret;
1255 }
1256
1257 static int ath6kl_upload_firmware(struct ath6kl *ar)
1258 {
1259         u32 address;
1260         int ret;
1261
1262         if (WARN_ON(ar->fw == NULL))
1263                 return 0;
1264
1265         address = ar->hw.app_load_addr;
1266
1267         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing firmware to 0x%x (%zd B)\n",
1268                    address, ar->fw_len);
1269
1270         ret = ath6kl_bmi_fast_download(ar, address, ar->fw, ar->fw_len);
1271
1272         if (ret) {
1273                 ath6kl_err("Failed to write firmware: %d\n", ret);
1274                 return ret;
1275         }
1276
1277         /*
1278          * Set starting address for firmware
1279          * Don't need to setup app_start override addr on AR6004
1280          */
1281         if (ar->target_type != TARGET_TYPE_AR6004) {
1282                 address = ar->hw.app_start_override_addr;
1283                 ath6kl_bmi_set_app_start(ar, address);
1284         }
1285         return ret;
1286 }
1287
1288 static int ath6kl_upload_patch(struct ath6kl *ar)
1289 {
1290         u32 address, param;
1291         int ret;
1292
1293         if (ar->fw_patch == NULL)
1294                 return 0;
1295
1296         address = ar->hw.dataset_patch_addr;
1297
1298         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing patch to 0x%x (%zd B)\n",
1299                    address, ar->fw_patch_len);
1300
1301         ret = ath6kl_bmi_write(ar, address, ar->fw_patch, ar->fw_patch_len);
1302         if (ret) {
1303                 ath6kl_err("Failed to write patch file: %d\n", ret);
1304                 return ret;
1305         }
1306
1307         param = address;
1308         ath6kl_bmi_write(ar,
1309                          ath6kl_get_hi_item_addr(ar,
1310                          HI_ITEM(hi_dset_list_head)),
1311                          (unsigned char *) &param, 4);
1312
1313         return 0;
1314 }
1315
1316 static int ath6kl_upload_testscript(struct ath6kl *ar)
1317 {
1318         u32 address, param;
1319         int ret;
1320
1321         if (testmode != 2)
1322                 return 0;
1323
1324         if (ar->fw_testscript == NULL)
1325                 return 0;
1326
1327         address = ar->hw.testscript_addr;
1328
1329         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing testscript to 0x%x (%zd B)\n",
1330                 address, ar->fw_testscript_len);
1331
1332         ret = ath6kl_bmi_write(ar, address, ar->fw_testscript,
1333                 ar->fw_testscript_len);
1334         if (ret) {
1335                 ath6kl_err("Failed to write testscript file: %d\n", ret);
1336                 return ret;
1337         }
1338
1339         param = address;
1340         ath6kl_bmi_write(ar,
1341                         ath6kl_get_hi_item_addr(ar,
1342                         HI_ITEM(hi_ota_testscript)),
1343                         (unsigned char *) &param, 4);
1344
1345         param = 4096;
1346         ath6kl_bmi_write(ar,
1347                         ath6kl_get_hi_item_addr(ar,
1348                         HI_ITEM(hi_end_ram_reserve_sz)),
1349                         (unsigned char *) &param, 4);
1350
1351         param = 1;
1352         ath6kl_bmi_write(ar,
1353                         ath6kl_get_hi_item_addr(ar,
1354                         HI_ITEM(hi_test_apps_related)),
1355                         (unsigned char *) &param, 4);
1356
1357         return 0;
1358 }
1359
1360 static int ath6kl_init_upload(struct ath6kl *ar)
1361 {
1362         u32 param, options, sleep, address;
1363         int status = 0;
1364
1365         if (ar->target_type != TARGET_TYPE_AR6003 &&
1366                 ar->target_type != TARGET_TYPE_AR6004)
1367                 return -EINVAL;
1368
1369         /* temporarily disable system sleep */
1370         address = MBOX_BASE_ADDRESS + LOCAL_SCRATCH_ADDRESS;
1371         status = ath6kl_bmi_reg_read(ar, address, &param);
1372         if (status)
1373                 return status;
1374
1375         options = param;
1376
1377         param |= ATH6KL_OPTION_SLEEP_DISABLE;
1378         status = ath6kl_bmi_reg_write(ar, address, param);
1379         if (status)
1380                 return status;
1381
1382         address = RTC_BASE_ADDRESS + SYSTEM_SLEEP_ADDRESS;
1383         status = ath6kl_bmi_reg_read(ar, address, &param);
1384         if (status)
1385                 return status;
1386
1387         sleep = param;
1388
1389         param |= SM(SYSTEM_SLEEP_DISABLE, 1);
1390         status = ath6kl_bmi_reg_write(ar, address, param);
1391         if (status)
1392                 return status;
1393
1394         ath6kl_dbg(ATH6KL_DBG_TRC, "old options: %d, old sleep: %d\n",
1395                    options, sleep);
1396
1397         /* program analog PLL register */
1398         /* no need to control 40/44MHz clock on AR6004 */
1399         if (ar->target_type != TARGET_TYPE_AR6004) {
1400                 status = ath6kl_bmi_reg_write(ar, ATH6KL_ANALOG_PLL_REGISTER,
1401                                               0xF9104001);
1402
1403                 if (status)
1404                         return status;
1405
1406                 /* Run at 80/88MHz by default */
1407                 param = SM(CPU_CLOCK_STANDARD, 1);
1408
1409                 address = RTC_BASE_ADDRESS + CPU_CLOCK_ADDRESS;
1410                 status = ath6kl_bmi_reg_write(ar, address, param);
1411                 if (status)
1412                         return status;
1413         }
1414
1415         param = 0;
1416         address = RTC_BASE_ADDRESS + LPO_CAL_ADDRESS;
1417         param = SM(LPO_CAL_ENABLE, 1);
1418         status = ath6kl_bmi_reg_write(ar, address, param);
1419         if (status)
1420                 return status;
1421
1422         /* WAR to avoid SDIO CRC err */
1423         if (ar->version.target_ver == AR6003_HW_2_0_VERSION) {
1424                 ath6kl_err("temporary war to avoid sdio crc error\n");
1425
1426                 param = 0x20;
1427
1428                 address = GPIO_BASE_ADDRESS + GPIO_PIN10_ADDRESS;
1429                 status = ath6kl_bmi_reg_write(ar, address, param);
1430                 if (status)
1431                         return status;
1432
1433                 address = GPIO_BASE_ADDRESS + GPIO_PIN11_ADDRESS;
1434                 status = ath6kl_bmi_reg_write(ar, address, param);
1435                 if (status)
1436                         return status;
1437
1438                 address = GPIO_BASE_ADDRESS + GPIO_PIN12_ADDRESS;
1439                 status = ath6kl_bmi_reg_write(ar, address, param);
1440                 if (status)
1441                         return status;
1442
1443                 address = GPIO_BASE_ADDRESS + GPIO_PIN13_ADDRESS;
1444                 status = ath6kl_bmi_reg_write(ar, address, param);
1445                 if (status)
1446                         return status;
1447         }
1448
1449         /* write EEPROM data to Target RAM */
1450         status = ath6kl_upload_board_file(ar);
1451         if (status)
1452                 return status;
1453
1454         /* transfer One time Programmable data */
1455         status = ath6kl_upload_otp(ar);
1456         if (status)
1457                 return status;
1458
1459         /* Download Target firmware */
1460         status = ath6kl_upload_firmware(ar);
1461         if (status)
1462                 return status;
1463
1464         status = ath6kl_upload_patch(ar);
1465         if (status)
1466                 return status;
1467
1468         /* Download the test script */
1469         status = ath6kl_upload_testscript(ar);
1470         if (status)
1471                 return status;
1472
1473         /* Restore system sleep */
1474         address = RTC_BASE_ADDRESS + SYSTEM_SLEEP_ADDRESS;
1475         status = ath6kl_bmi_reg_write(ar, address, sleep);
1476         if (status)
1477                 return status;
1478
1479         address = MBOX_BASE_ADDRESS + LOCAL_SCRATCH_ADDRESS;
1480         param = options | 0x20;
1481         status = ath6kl_bmi_reg_write(ar, address, param);
1482         if (status)
1483                 return status;
1484
1485         return status;
1486 }
1487
1488 static int ath6kl_init_hw_params(struct ath6kl *ar)
1489 {
1490         const struct ath6kl_hw *hw;
1491         int i;
1492
1493         for (i = 0; i < ARRAY_SIZE(hw_list); i++) {
1494                 hw = &hw_list[i];
1495
1496                 if (hw->id == ar->version.target_ver)
1497                         break;
1498         }
1499
1500         if (i == ARRAY_SIZE(hw_list)) {
1501                 ath6kl_err("Unsupported hardware version: 0x%x\n",
1502                            ar->version.target_ver);
1503                 return -EINVAL;
1504         }
1505
1506         ar->hw = *hw;
1507
1508         ath6kl_dbg(ATH6KL_DBG_BOOT,
1509                    "target_ver 0x%x target_type 0x%x dataset_patch 0x%x app_load_addr 0x%x\n",
1510                    ar->version.target_ver, ar->target_type,
1511                    ar->hw.dataset_patch_addr, ar->hw.app_load_addr);
1512         ath6kl_dbg(ATH6KL_DBG_BOOT,
1513                    "app_start_override_addr 0x%x board_ext_data_addr 0x%x reserved_ram_size 0x%x",
1514                    ar->hw.app_start_override_addr, ar->hw.board_ext_data_addr,
1515                    ar->hw.reserved_ram_size);
1516         ath6kl_dbg(ATH6KL_DBG_BOOT,
1517                    "refclk_hz %d uarttx_pin %d",
1518                    ar->hw.refclk_hz, ar->hw.uarttx_pin);
1519
1520         return 0;
1521 }
1522
1523 static const char *ath6kl_init_get_hif_name(enum ath6kl_hif_type type)
1524 {
1525         switch (type) {
1526         case ATH6KL_HIF_TYPE_SDIO:
1527                 return "sdio";
1528         case ATH6KL_HIF_TYPE_USB:
1529                 return "usb";
1530         }
1531
1532         return NULL;
1533 }
1534
1535 int ath6kl_init_hw_start(struct ath6kl *ar)
1536 {
1537         long timeleft;
1538         int ret, i;
1539
1540         ath6kl_dbg(ATH6KL_DBG_BOOT, "hw start\n");
1541
1542         ret = ath6kl_hif_power_on(ar);
1543         if (ret)
1544                 return ret;
1545
1546         ret = ath6kl_configure_target(ar);
1547         if (ret)
1548                 goto err_power_off;
1549
1550         ret = ath6kl_init_upload(ar);
1551         if (ret)
1552                 goto err_power_off;
1553
1554         /* Do we need to finish the BMI phase */
1555         /* FIXME: return error from ath6kl_bmi_done() */
1556         if (ath6kl_bmi_done(ar)) {
1557                 ret = -EIO;
1558                 goto err_power_off;
1559         }
1560
1561         /*
1562          * The reason we have to wait for the target here is that the
1563          * driver layer has to init BMI in order to set the host block
1564          * size.
1565          */
1566         if (ath6kl_htc_wait_target(ar->htc_target)) {
1567                 ret = -EIO;
1568                 goto err_power_off;
1569         }
1570
1571         if (ath6kl_init_service_ep(ar)) {
1572                 ret = -EIO;
1573                 goto err_cleanup_scatter;
1574         }
1575
1576         /* setup credit distribution */
1577         ath6kl_credit_setup(ar->htc_target, &ar->credit_state_info);
1578
1579         /* start HTC */
1580         ret = ath6kl_htc_start(ar->htc_target);
1581         if (ret) {
1582                 /* FIXME: call this */
1583                 ath6kl_cookie_cleanup(ar);
1584                 goto err_cleanup_scatter;
1585         }
1586
1587         /* Wait for Wmi event to be ready */
1588         timeleft = wait_event_interruptible_timeout(ar->event_wq,
1589                                                     test_bit(WMI_READY,
1590                                                              &ar->flag),
1591                                                     WMI_TIMEOUT);
1592
1593         ath6kl_dbg(ATH6KL_DBG_BOOT, "firmware booted\n");
1594
1595
1596         if (test_and_clear_bit(FIRST_BOOT, &ar->flag)) {
1597                 ath6kl_info("%s %s fw %s api %d%s\n",
1598                             ar->hw.name,
1599                             ath6kl_init_get_hif_name(ar->hif_type),
1600                             ar->wiphy->fw_version,
1601                             ar->fw_api,
1602                             test_bit(TESTMODE, &ar->flag) ? " testmode" : "");
1603         }
1604
1605         if (ar->version.abi_ver != ATH6KL_ABI_VERSION) {
1606                 ath6kl_err("abi version mismatch: host(0x%x), target(0x%x)\n",
1607                            ATH6KL_ABI_VERSION, ar->version.abi_ver);
1608                 ret = -EIO;
1609                 goto err_htc_stop;
1610         }
1611
1612         if (!timeleft || signal_pending(current)) {
1613                 ath6kl_err("wmi is not ready or wait was interrupted\n");
1614                 ret = -EIO;
1615                 goto err_htc_stop;
1616         }
1617
1618         ath6kl_dbg(ATH6KL_DBG_TRC, "%s: wmi is ready\n", __func__);
1619
1620         /* communicate the wmi protocol verision to the target */
1621         /* FIXME: return error */
1622         if ((ath6kl_set_host_app_area(ar)) != 0)
1623                 ath6kl_err("unable to set the host app area\n");
1624
1625         for (i = 0; i < ar->vif_max; i++) {
1626                 ret = ath6kl_target_config_wlan_params(ar, i);
1627                 if (ret)
1628                         goto err_htc_stop;
1629         }
1630
1631         ar->state = ATH6KL_STATE_ON;
1632
1633         return 0;
1634
1635 err_htc_stop:
1636         ath6kl_htc_stop(ar->htc_target);
1637 err_cleanup_scatter:
1638         ath6kl_hif_cleanup_scatter(ar);
1639 err_power_off:
1640         ath6kl_hif_power_off(ar);
1641
1642         return ret;
1643 }
1644
1645 int ath6kl_init_hw_stop(struct ath6kl *ar)
1646 {
1647         int ret;
1648
1649         ath6kl_dbg(ATH6KL_DBG_BOOT, "hw stop\n");
1650
1651         ath6kl_htc_stop(ar->htc_target);
1652
1653         ath6kl_hif_stop(ar);
1654
1655         ath6kl_bmi_reset(ar);
1656
1657         ret = ath6kl_hif_power_off(ar);
1658         if (ret)
1659                 ath6kl_warn("failed to power off hif: %d\n", ret);
1660
1661         ar->state = ATH6KL_STATE_OFF;
1662
1663         return 0;
1664 }
1665
1666 int ath6kl_core_init(struct ath6kl *ar)
1667 {
1668         struct ath6kl_bmi_target_info targ_info;
1669         struct net_device *ndev;
1670         int ret = 0, i;
1671
1672         ar->ath6kl_wq = create_singlethread_workqueue("ath6kl");
1673         if (!ar->ath6kl_wq)
1674                 return -ENOMEM;
1675
1676         ret = ath6kl_bmi_init(ar);
1677         if (ret)
1678                 goto err_wq;
1679
1680         /*
1681          * Turn on power to get hardware (target) version and leave power
1682          * on delibrately as we will boot the hardware anyway within few
1683          * seconds.
1684          */
1685         ret = ath6kl_hif_power_on(ar);
1686         if (ret)
1687                 goto err_bmi_cleanup;
1688
1689         ret = ath6kl_bmi_get_target_info(ar, &targ_info);
1690         if (ret)
1691                 goto err_power_off;
1692
1693         ar->version.target_ver = le32_to_cpu(targ_info.version);
1694         ar->target_type = le32_to_cpu(targ_info.type);
1695         ar->wiphy->hw_version = le32_to_cpu(targ_info.version);
1696
1697         ret = ath6kl_init_hw_params(ar);
1698         if (ret)
1699                 goto err_power_off;
1700
1701         ar->htc_target = ath6kl_htc_create(ar);
1702
1703         if (!ar->htc_target) {
1704                 ret = -ENOMEM;
1705                 goto err_power_off;
1706         }
1707
1708         ret = ath6kl_fetch_firmwares(ar);
1709         if (ret)
1710                 goto err_htc_cleanup;
1711
1712         /* FIXME: we should free all firmwares in the error cases below */
1713
1714         /* Indicate that WMI is enabled (although not ready yet) */
1715         set_bit(WMI_ENABLED, &ar->flag);
1716         ar->wmi = ath6kl_wmi_init(ar);
1717         if (!ar->wmi) {
1718                 ath6kl_err("failed to initialize wmi\n");
1719                 ret = -EIO;
1720                 goto err_htc_cleanup;
1721         }
1722
1723         ath6kl_dbg(ATH6KL_DBG_TRC, "%s: got wmi @ 0x%p.\n", __func__, ar->wmi);
1724
1725         ret = ath6kl_register_ieee80211_hw(ar);
1726         if (ret)
1727                 goto err_node_cleanup;
1728
1729         ret = ath6kl_debug_init(ar);
1730         if (ret) {
1731                 wiphy_unregister(ar->wiphy);
1732                 goto err_node_cleanup;
1733         }
1734
1735         for (i = 0; i < ar->vif_max; i++)
1736                 ar->avail_idx_map |= BIT(i);
1737
1738         rtnl_lock();
1739
1740         /* Add an initial station interface */
1741         ndev = ath6kl_interface_add(ar, "wlan%d", NL80211_IFTYPE_STATION, 0,
1742                                     INFRA_NETWORK);
1743
1744         rtnl_unlock();
1745
1746         if (!ndev) {
1747                 ath6kl_err("Failed to instantiate a network device\n");
1748                 ret = -ENOMEM;
1749                 wiphy_unregister(ar->wiphy);
1750                 goto err_debug_init;
1751         }
1752
1753
1754         ath6kl_dbg(ATH6KL_DBG_TRC, "%s: name=%s dev=0x%p, ar=0x%p\n",
1755                         __func__, ndev->name, ndev, ar);
1756
1757         /* setup access class priority mappings */
1758         ar->ac_stream_pri_map[WMM_AC_BK] = 0; /* lowest  */
1759         ar->ac_stream_pri_map[WMM_AC_BE] = 1;
1760         ar->ac_stream_pri_map[WMM_AC_VI] = 2;
1761         ar->ac_stream_pri_map[WMM_AC_VO] = 3; /* highest */
1762
1763         /* give our connected endpoints some buffers */
1764         ath6kl_rx_refill(ar->htc_target, ar->ctrl_ep);
1765         ath6kl_rx_refill(ar->htc_target, ar->ac2ep_map[WMM_AC_BE]);
1766
1767         /* allocate some buffers that handle larger AMSDU frames */
1768         ath6kl_refill_amsdu_rxbufs(ar, ATH6KL_MAX_AMSDU_RX_BUFFERS);
1769
1770         ath6kl_cookie_init(ar);
1771
1772         ar->conf_flags = ATH6KL_CONF_IGNORE_ERP_BARKER |
1773                          ATH6KL_CONF_ENABLE_11N | ATH6KL_CONF_ENABLE_TX_BURST;
1774
1775         if (suspend_cutpower)
1776                 ar->conf_flags |= ATH6KL_CONF_SUSPEND_CUTPOWER;
1777
1778         ar->wiphy->flags |= WIPHY_FLAG_SUPPORTS_FW_ROAM |
1779                             WIPHY_FLAG_HAVE_AP_SME |
1780                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
1781                             WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
1782
1783         if (test_bit(ATH6KL_FW_CAPABILITY_SCHED_SCAN, ar->fw_capabilities))
1784                 ar->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
1785
1786         ar->wiphy->probe_resp_offload =
1787                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS |
1788                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 |
1789                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P |
1790                 NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U;
1791
1792         set_bit(FIRST_BOOT, &ar->flag);
1793
1794         ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1795
1796         ret = ath6kl_init_hw_start(ar);
1797         if (ret) {
1798                 ath6kl_err("Failed to start hardware: %d\n", ret);
1799                 goto err_rxbuf_cleanup;
1800         }
1801
1802         /*
1803          * Set mac address which is received in ready event
1804          * FIXME: Move to ath6kl_interface_add()
1805          */
1806         memcpy(ndev->dev_addr, ar->mac_addr, ETH_ALEN);
1807
1808         return ret;
1809
1810 err_rxbuf_cleanup:
1811         ath6kl_htc_flush_rx_buf(ar->htc_target);
1812         ath6kl_cleanup_amsdu_rxbufs(ar);
1813         rtnl_lock();
1814         ath6kl_cfg80211_vif_cleanup(netdev_priv(ndev));
1815         rtnl_unlock();
1816         wiphy_unregister(ar->wiphy);
1817 err_debug_init:
1818         ath6kl_debug_cleanup(ar);
1819 err_node_cleanup:
1820         ath6kl_wmi_shutdown(ar->wmi);
1821         clear_bit(WMI_ENABLED, &ar->flag);
1822         ar->wmi = NULL;
1823 err_htc_cleanup:
1824         ath6kl_htc_cleanup(ar->htc_target);
1825 err_power_off:
1826         ath6kl_hif_power_off(ar);
1827 err_bmi_cleanup:
1828         ath6kl_bmi_cleanup(ar);
1829 err_wq:
1830         destroy_workqueue(ar->ath6kl_wq);
1831
1832         return ret;
1833 }
1834
1835 /* FIXME: move this to cfg80211.c and rename to ath6kl_cfg80211_vif_stop() */
1836 void ath6kl_cleanup_vif(struct ath6kl_vif *vif, bool wmi_ready)
1837 {
1838         static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1839         bool discon_issued;
1840
1841         netif_stop_queue(vif->ndev);
1842
1843         clear_bit(WLAN_ENABLED, &vif->flags);
1844
1845         if (wmi_ready) {
1846                 discon_issued = test_bit(CONNECTED, &vif->flags) ||
1847                                 test_bit(CONNECT_PEND, &vif->flags);
1848                 ath6kl_disconnect(vif);
1849                 del_timer(&vif->disconnect_timer);
1850
1851                 if (discon_issued)
1852                         ath6kl_disconnect_event(vif, DISCONNECT_CMD,
1853                                                 (vif->nw_type & AP_NETWORK) ?
1854                                                 bcast_mac : vif->bssid,
1855                                                 0, NULL, 0);
1856         }
1857
1858         if (vif->scan_req) {
1859                 cfg80211_scan_done(vif->scan_req, true);
1860                 vif->scan_req = NULL;
1861         }
1862 }
1863
1864 void ath6kl_stop_txrx(struct ath6kl *ar)
1865 {
1866         struct ath6kl_vif *vif, *tmp_vif;
1867
1868         set_bit(DESTROY_IN_PROGRESS, &ar->flag);
1869
1870         if (down_interruptible(&ar->sem)) {
1871                 ath6kl_err("down_interruptible failed\n");
1872                 return;
1873         }
1874
1875         spin_lock_bh(&ar->list_lock);
1876         list_for_each_entry_safe(vif, tmp_vif, &ar->vif_list, list) {
1877                 list_del(&vif->list);
1878                 spin_unlock_bh(&ar->list_lock);
1879                 ath6kl_cleanup_vif(vif, test_bit(WMI_READY, &ar->flag));
1880                 rtnl_lock();
1881                 ath6kl_cfg80211_vif_cleanup(vif);
1882                 rtnl_unlock();
1883                 spin_lock_bh(&ar->list_lock);
1884         }
1885         spin_unlock_bh(&ar->list_lock);
1886
1887         clear_bit(WMI_READY, &ar->flag);
1888
1889         /*
1890          * After wmi_shudown all WMI events will be dropped. We
1891          * need to cleanup the buffers allocated in AP mode and
1892          * give disconnect notification to stack, which usually
1893          * happens in the disconnect_event. Simulate the disconnect
1894          * event by calling the function directly. Sometimes
1895          * disconnect_event will be received when the debug logs
1896          * are collected.
1897          */
1898         ath6kl_wmi_shutdown(ar->wmi);
1899
1900         clear_bit(WMI_ENABLED, &ar->flag);
1901         if (ar->htc_target) {
1902                 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
1903                 ath6kl_htc_stop(ar->htc_target);
1904         }
1905
1906         /*
1907          * Try to reset the device if we can. The driver may have been
1908          * configure NOT to reset the target during a debug session.
1909          */
1910         ath6kl_dbg(ATH6KL_DBG_TRC,
1911                         "attempting to reset target on instance destroy\n");
1912         ath6kl_reset_device(ar, ar->target_type, true, true);
1913
1914         clear_bit(WLAN_ENABLED, &ar->flag);
1915 }