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

   1
   2 /*
   3  * Copyright (c) 2011 Atheros Communications Inc.
   4  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include <linux/moduleparam.h>
  22 #include <linux/errno.h>
  23 #include <linux/export.h>
  24 #include <linux/of.h>
  25 #include <linux/mmc/sdio_func.h>
  26 #include <linux/vmalloc.h>
  27
  28 #include "core.h"
  29 #include "cfg80211.h"
  30 #include "target.h"
  31 #include "debug.h"
  32 #include "hif-ops.h"
  33 #include "htc-ops.h"
  34
  35 static const struct ath6kl_hw hw_list[] = {
  36         {
  37                 .id                             = AR6003_HW_2_0_VERSION,
  38                 .name                           = "ar6003 hw 2.0",
  39                 .dataset_patch_addr             = 0x57e884,
  40                 .app_load_addr                  = 0x543180,
  41                 .board_ext_data_addr            = 0x57e500,
  42                 .reserved_ram_size              = 6912,
  43                 .refclk_hz                      = 26000000,
  44                 .uarttx_pin                     = 8,
  45                 .flags                          = ATH6KL_HW_SDIO_CRC_ERROR_WAR,
  46
  47                 /* hw2.0 needs override address hardcoded */
  48                 .app_start_override_addr        = 0x944C00,
  49
  50                 .fw = {
  51                         .dir            = AR6003_HW_2_0_FW_DIR,
  52                         .otp            = AR6003_HW_2_0_OTP_FILE,
  53                         .fw             = AR6003_HW_2_0_FIRMWARE_FILE,
  54                         .tcmd           = AR6003_HW_2_0_TCMD_FIRMWARE_FILE,
  55                         .patch          = AR6003_HW_2_0_PATCH_FILE,
  56                 },
  57
  58                 .fw_board               = AR6003_HW_2_0_BOARD_DATA_FILE,
  59                 .fw_default_board       = AR6003_HW_2_0_DEFAULT_BOARD_DATA_FILE,
  60         },
  61         {
  62                 .id                             = AR6003_HW_2_1_1_VERSION,
  63                 .name                           = "ar6003 hw 2.1.1",
  64                 .dataset_patch_addr             = 0x57ff74,
  65                 .app_load_addr                  = 0x1234,
  66                 .board_ext_data_addr            = 0x542330,
  67                 .reserved_ram_size              = 512,
  68                 .refclk_hz                      = 26000000,
  69                 .uarttx_pin                     = 8,
  70                 .testscript_addr                = 0x57ef74,
  71                 .flags                          = ATH6KL_HW_SDIO_CRC_ERROR_WAR,
  72
  73                 .fw = {
  74                         .dir            = AR6003_HW_2_1_1_FW_DIR,
  75                         .otp            = AR6003_HW_2_1_1_OTP_FILE,
  76                         .fw             = AR6003_HW_2_1_1_FIRMWARE_FILE,
  77                         .tcmd           = AR6003_HW_2_1_1_TCMD_FIRMWARE_FILE,
  78                         .patch          = AR6003_HW_2_1_1_PATCH_FILE,
  79                         .utf            = AR6003_HW_2_1_1_UTF_FIRMWARE_FILE,
  80                         .testscript     = AR6003_HW_2_1_1_TESTSCRIPT_FILE,
  81                 },
  82
  83                 .fw_board               = AR6003_HW_2_1_1_BOARD_DATA_FILE,
  84                 .fw_default_board = AR6003_HW_2_1_1_DEFAULT_BOARD_DATA_FILE,
  85         },
  86         {
  87                 .id                             = AR6004_HW_1_0_VERSION,
  88                 .name                           = "ar6004 hw 1.0",
  89                 .dataset_patch_addr             = 0x57e884,
  90                 .app_load_addr                  = 0x1234,
  91                 .board_ext_data_addr            = 0x437000,
  92                 .reserved_ram_size              = 19456,
  93                 .board_addr                     = 0x433900,
  94                 .refclk_hz                      = 26000000,
  95                 .uarttx_pin                     = 11,
  96                 .flags                          = ATH6KL_HW_64BIT_RATES |
  97                                                   ATH6KL_HW_AP_INACTIVITY_MINS,
  98
  99                 .fw = {
 100                         .dir            = AR6004_HW_1_0_FW_DIR,
 101                         .fw             = AR6004_HW_1_0_FIRMWARE_FILE,
 102                 },
 103
 104                 .fw_board               = AR6004_HW_1_0_BOARD_DATA_FILE,
 105                 .fw_default_board       = AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE,
 106         },
 107         {
 108                 .id                             = AR6004_HW_1_1_VERSION,
 109                 .name                           = "ar6004 hw 1.1",
 110                 .dataset_patch_addr             = 0x57e884,
 111                 .app_load_addr                  = 0x1234,
 112                 .board_ext_data_addr            = 0x437000,
 113                 .reserved_ram_size              = 11264,
 114                 .board_addr                     = 0x43d400,
 115                 .refclk_hz                      = 40000000,
 116                 .uarttx_pin                     = 11,
 117                 .flags                          = ATH6KL_HW_64BIT_RATES |
 118                                                   ATH6KL_HW_AP_INACTIVITY_MINS,
 119                 .fw = {
 120                         .dir            = AR6004_HW_1_1_FW_DIR,
 121                         .fw             = AR6004_HW_1_1_FIRMWARE_FILE,
 122                 },
 123
 124                 .fw_board               = AR6004_HW_1_1_BOARD_DATA_FILE,
 125                 .fw_default_board       = AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE,
 126         },
 127         {
 128                 .id                             = AR6004_HW_1_2_VERSION,
 129                 .name                           = "ar6004 hw 1.2",
 130                 .dataset_patch_addr             = 0x436ecc,
 131                 .app_load_addr                  = 0x1234,
 132                 .board_ext_data_addr            = 0x437000,
 133                 .reserved_ram_size              = 9216,
 134                 .board_addr                     = 0x435c00,
 135                 .refclk_hz                      = 40000000,
 136                 .uarttx_pin                     = 11,
 137                 .flags                          = ATH6KL_HW_64BIT_RATES |
 138                                                   ATH6KL_HW_AP_INACTIVITY_MINS,
 139
 140                 .fw = {
 141                         .dir            = AR6004_HW_1_2_FW_DIR,
 142                         .fw             = AR6004_HW_1_2_FIRMWARE_FILE,
 143                 },
 144                 .fw_board               = AR6004_HW_1_2_BOARD_DATA_FILE,
 145                 .fw_default_board       = AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE,
 146         },
 147         {
 148                 .id                             = AR6004_HW_1_3_VERSION,
 149                 .name                           = "ar6004 hw 1.3",
 150                 .dataset_patch_addr             = 0x437860,
 151                 .app_load_addr                  = 0x1234,
 152                 .board_ext_data_addr            = 0x437000,
 153                 .reserved_ram_size              = 7168,
 154                 .board_addr                     = 0x436400,
 155                 .refclk_hz                      = 40000000,
 156                 .uarttx_pin                     = 11,
 157                 .flags                          = ATH6KL_HW_64BIT_RATES |
 158                                                   ATH6KL_HW_AP_INACTIVITY_MINS |
 159                                                   ATH6KL_HW_MAP_LP_ENDPOINT,
 160
 161                 .fw = {
 162                         .dir            = AR6004_HW_1_3_FW_DIR,
 163                         .fw             = AR6004_HW_1_3_FIRMWARE_FILE,
 164                 },
 165
 166                 .fw_board               = AR6004_HW_1_3_BOARD_DATA_FILE,
 167                 .fw_default_board       = AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE,
 168         },
 169 };
 170
 171 /*
 172  * Include definitions here that can be used to tune the WLAN module
 173  * behavior. Different customers can tune the behavior as per their needs,
 174  * here.
 175  */
 176
 177 /*
 178  * This configuration item enable/disable keepalive support.
 179  * Keepalive support: In the absence of any data traffic to AP, null
 180  * frames will be sent to the AP at periodic interval, to keep the association
 181  * active. This configuration item defines the periodic interval.
 182  * Use value of zero to disable keepalive support
 183  * Default: 60 seconds
 184  */
 185 #define WLAN_CONFIG_KEEP_ALIVE_INTERVAL 60
 186
 187 /*
 188  * This configuration item sets the value of disconnect timeout
 189  * Firmware delays sending the disconnec event to the host for this
 190  * timeout after is gets disconnected from the current AP.
 191  * If the firmware successly roams within the disconnect timeout
 192  * it sends a new connect event
 193  */
 194 #define WLAN_CONFIG_DISCONNECT_TIMEOUT 10
 195
 196
 197 #define ATH6KL_DATA_OFFSET    64
 198 struct sk_buff *ath6kl_buf_alloc(int size)
 199 {
 200         struct sk_buff *skb;
 201         u16 reserved;
 202
 203         /* Add chacheline space at front and back of buffer */
 204         reserved = roundup((2 * L1_CACHE_BYTES) + ATH6KL_DATA_OFFSET +
 205                    sizeof(struct htc_packet) + ATH6KL_HTC_ALIGN_BYTES, 4);
 206         skb = dev_alloc_skb(size + reserved);
 207
 208         if (skb)
 209                 skb_reserve(skb, reserved - L1_CACHE_BYTES);
 210         return skb;
 211 }
 212
 213 void ath6kl_init_profile_info(struct ath6kl_vif *vif)
 214 {
 215         vif->ssid_len = 0;
 216         memset(vif->ssid, 0, sizeof(vif->ssid));
 217
 218         vif->dot11_auth_mode = OPEN_AUTH;
 219         vif->auth_mode = NONE_AUTH;
 220         vif->prwise_crypto = NONE_CRYPT;
 221         vif->prwise_crypto_len = 0;
 222         vif->grp_crypto = NONE_CRYPT;
 223         vif->grp_crypto_len = 0;
 224         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
 225         memset(vif->req_bssid, 0, sizeof(vif->req_bssid));
 226         memset(vif->bssid, 0, sizeof(vif->bssid));
 227         vif->bss_ch = 0;
 228 }
 229
 230 static int ath6kl_set_host_app_area(struct ath6kl *ar)
 231 {
 232         u32 address, data;
 233         struct host_app_area host_app_area;
 234
 235         /* Fetch the address of the host_app_area_s
 236          * instance in the host interest area */
 237         address = ath6kl_get_hi_item_addr(ar, HI_ITEM(hi_app_host_interest));
 238         address = TARG_VTOP(ar->target_type, address);
 239
 240         if (ath6kl_diag_read32(ar, address, &data))
 241                 return -EIO;
 242
 243         address = TARG_VTOP(ar->target_type, data);
 244         host_app_area.wmi_protocol_ver = cpu_to_le32(WMI_PROTOCOL_VERSION);
 245         if (ath6kl_diag_write(ar, address, (u8 *) &host_app_area,
 246                               sizeof(struct host_app_area)))
 247                 return -EIO;
 248
 249         return 0;
 250 }
 251
 252 static inline void set_ac2_ep_map(struct ath6kl *ar,
 253                                   u8 ac,
 254                                   enum htc_endpoint_id ep)
 255 {
 256         ar->ac2ep_map[ac] = ep;
 257         ar->ep2ac_map[ep] = ac;
 258 }
 259
 260 /* connect to a service */
 261 static int ath6kl_connectservice(struct ath6kl *ar,
 262                                  struct htc_service_connect_req  *con_req,
 263                                  char *desc)
 264 {
 265         int status;
 266         struct htc_service_connect_resp response;
 267
 268         memset(&response, 0, sizeof(response));
 269
 270         status = ath6kl_htc_conn_service(ar->htc_target, con_req, &response);
 271         if (status) {
 272                 ath6kl_err("failed to connect to %s service status:%d\n",
 273                            desc, status);
 274                 return status;
 275         }
 276
 277         switch (con_req->svc_id) {
 278         case WMI_CONTROL_SVC:
 279                 if (test_bit(WMI_ENABLED, &ar->flag))
 280                         ath6kl_wmi_set_control_ep(ar->wmi, response.endpoint);
 281                 ar->ctrl_ep = response.endpoint;
 282                 break;
 283         case WMI_DATA_BE_SVC:
 284                 set_ac2_ep_map(ar, WMM_AC_BE, response.endpoint);
 285                 break;
 286         case WMI_DATA_BK_SVC:
 287                 set_ac2_ep_map(ar, WMM_AC_BK, response.endpoint);
 288                 break;
 289         case WMI_DATA_VI_SVC:
 290                 set_ac2_ep_map(ar, WMM_AC_VI, response.endpoint);
 291                 break;
 292         case WMI_DATA_VO_SVC:
 293                 set_ac2_ep_map(ar, WMM_AC_VO, response.endpoint);
 294                 break;
 295         default:
 296                 ath6kl_err("service id is not mapped %d\n", con_req->svc_id);
 297                 return -EINVAL;
 298         }
 299
 300         return 0;
 301 }
 302
 303 static int ath6kl_init_service_ep(struct ath6kl *ar)
 304 {
 305         struct htc_service_connect_req connect;
 306
 307         memset(&connect, 0, sizeof(connect));
 308
 309         /* these fields are the same for all service endpoints */
 310         connect.ep_cb.tx_comp_multi = ath6kl_tx_complete;
 311         connect.ep_cb.rx = ath6kl_rx;
 312         connect.ep_cb.rx_refill = ath6kl_rx_refill;
 313         connect.ep_cb.tx_full = ath6kl_tx_queue_full;
 314
 315         /*
 316          * Set the max queue depth so that our ath6kl_tx_queue_full handler
 317          * gets called.
 318         */
 319         connect.max_txq_depth = MAX_DEFAULT_SEND_QUEUE_DEPTH;
 320         connect.ep_cb.rx_refill_thresh = ATH6KL_MAX_RX_BUFFERS / 4;
 321         if (!connect.ep_cb.rx_refill_thresh)
 322                 connect.ep_cb.rx_refill_thresh++;
 323
 324         /* connect to control service */
 325         connect.svc_id = WMI_CONTROL_SVC;
 326         if (ath6kl_connectservice(ar, &connect, "WMI CONTROL"))
 327                 return -EIO;
 328
 329         connect.flags |= HTC_FLGS_TX_BNDL_PAD_EN;
 330
 331         /*
 332          * Limit the HTC message size on the send path, although e can
 333          * receive A-MSDU frames of 4K, we will only send ethernet-sized
 334          * (802.3) frames on the send path.
 335          */
 336         connect.max_rxmsg_sz = WMI_MAX_TX_DATA_FRAME_LENGTH;
 337
 338         /*
 339          * To reduce the amount of committed memory for larger A_MSDU
 340          * frames, use the recv-alloc threshold mechanism for larger
 341          * packets.
 342          */
 343         connect.ep_cb.rx_alloc_thresh = ATH6KL_BUFFER_SIZE;
 344         connect.ep_cb.rx_allocthresh = ath6kl_alloc_amsdu_rxbuf;
 345
 346         /*
 347          * For the remaining data services set the connection flag to
 348          * reduce dribbling, if configured to do so.
 349          */
 350         connect.conn_flags |= HTC_CONN_FLGS_REDUCE_CRED_DRIB;
 351         connect.conn_flags &= ~HTC_CONN_FLGS_THRESH_MASK;
 352         connect.conn_flags |= HTC_CONN_FLGS_THRESH_LVL_HALF;
 353
 354         connect.svc_id = WMI_DATA_BE_SVC;
 355
 356         if (ath6kl_connectservice(ar, &connect, "WMI DATA BE"))
 357                 return -EIO;
 358
 359         /* connect to back-ground map this to WMI LOW_PRI */
 360         connect.svc_id = WMI_DATA_BK_SVC;
 361         if (ath6kl_connectservice(ar, &connect, "WMI DATA BK"))
 362                 return -EIO;
 363
 364         /* connect to Video service, map this to HI PRI */
 365         connect.svc_id = WMI_DATA_VI_SVC;
 366         if (ath6kl_connectservice(ar, &connect, "WMI DATA VI"))
 367                 return -EIO;
 368
 369         /*
 370          * Connect to VO service, this is currently not mapped to a WMI
 371          * priority stream due to historical reasons. WMI originally
 372          * defined 3 priorities over 3 mailboxes We can change this when
 373          * WMI is reworked so that priorities are not dependent on
 374          * mailboxes.
 375          */
 376         connect.svc_id = WMI_DATA_VO_SVC;
 377         if (ath6kl_connectservice(ar, &connect, "WMI DATA VO"))
 378                 return -EIO;
 379
 380         return 0;
 381 }
 382
 383 void ath6kl_init_control_info(struct ath6kl_vif *vif)
 384 {
 385         ath6kl_init_profile_info(vif);
 386         vif->def_txkey_index = 0;
 387         memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
 388         vif->ch_hint = 0;
 389 }
 390
 391 /*
 392  * Set HTC/Mbox operational parameters, this can only be called when the
 393  * target is in the BMI phase.
 394  */
 395 static int ath6kl_set_htc_params(struct ath6kl *ar, u32 mbox_isr_yield_val,
 396                                  u8 htc_ctrl_buf)
 397 {
 398         int status;
 399         u32 blk_size;
 400
 401         blk_size = ar->mbox_info.block_size;
 402
 403         if (htc_ctrl_buf)
 404                 blk_size |=  ((u32)htc_ctrl_buf) << 16;
 405
 406         /* set the host interest area for the block size */
 407         status = ath6kl_bmi_write_hi32(ar, hi_mbox_io_block_sz, blk_size);
 408         if (status) {
 409                 ath6kl_err("bmi_write_memory for IO block size failed\n");
 410                 goto out;
 411         }
 412
 413         ath6kl_dbg(ATH6KL_DBG_TRC, "block size set: %d (target addr:0x%X)\n",
 414                    blk_size,
 415                    ath6kl_get_hi_item_addr(ar, HI_ITEM(hi_mbox_io_block_sz)));
 416
 417         if (mbox_isr_yield_val) {
 418                 /* set the host interest area for the mbox ISR yield limit */
 419                 status = ath6kl_bmi_write_hi32(ar, hi_mbox_isr_yield_limit,
 420                                                mbox_isr_yield_val);
 421                 if (status) {
 422                         ath6kl_err("bmi_write_memory for yield limit failed\n");
 423                         goto out;
 424                 }
 425         }
 426
 427 out:
 428         return status;
 429 }
 430
 431 static int ath6kl_target_config_wlan_params(struct ath6kl *ar, int idx)
 432 {
 433         int ret;
 434
 435         /*
 436          * Configure the device for rx dot11 header rules. "0,0" are the
 437          * default values. Required if checksum offload is needed. Set
 438          * RxMetaVersion to 2.
 439          */
 440         ret = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi, idx,
 441                                                  ar->rx_meta_ver, 0, 0);
 442         if (ret) {
 443                 ath6kl_err("unable to set the rx frame format: %d\n", ret);
 444                 return ret;
 445         }
 446
 447         if (ar->conf_flags & ATH6KL_CONF_IGNORE_PS_FAIL_EVT_IN_SCAN) {
 448                 ret = ath6kl_wmi_pmparams_cmd(ar->wmi, idx, 0, 1, 0, 0, 1,
 449                                               IGNORE_PS_FAIL_DURING_SCAN);
 450                 if (ret) {
 451                         ath6kl_err("unable to set power save fail event policy: %d\n",
 452                                    ret);
 453                         return ret;
 454                 }
 455         }
 456
 457         if (!(ar->conf_flags & ATH6KL_CONF_IGNORE_ERP_BARKER)) {
 458                 ret = ath6kl_wmi_set_lpreamble_cmd(ar->wmi, idx, 0,
 459                                                    WMI_FOLLOW_BARKER_IN_ERP);
 460                 if (ret) {
 461                         ath6kl_err("unable to set barker preamble policy: %d\n",
 462                                    ret);
 463                         return ret;
 464                 }
 465         }
 466
 467         ret = ath6kl_wmi_set_keepalive_cmd(ar->wmi, idx,
 468                                            WLAN_CONFIG_KEEP_ALIVE_INTERVAL);
 469         if (ret) {
 470                 ath6kl_err("unable to set keep alive interval: %d\n", ret);
 471                 return ret;
 472         }
 473
 474         ret = ath6kl_wmi_disctimeout_cmd(ar->wmi, idx,
 475                                          WLAN_CONFIG_DISCONNECT_TIMEOUT);
 476         if (ret) {
 477                 ath6kl_err("unable to set disconnect timeout: %d\n", ret);
 478                 return ret;
 479         }
 480
 481         if (!(ar->conf_flags & ATH6KL_CONF_ENABLE_TX_BURST)) {
 482                 ret = ath6kl_wmi_set_wmm_txop(ar->wmi, idx, WMI_TXOP_DISABLED);
 483                 if (ret) {
 484                         ath6kl_err("unable to set txop bursting: %d\n", ret);
 485                         return ret;
 486                 }
 487         }
 488
 489         if (ar->p2p && (ar->vif_max == 1 || idx)) {
 490                 ret = ath6kl_wmi_info_req_cmd(ar->wmi, idx,
 491                                               P2P_FLAG_CAPABILITIES_REQ |
 492                                               P2P_FLAG_MACADDR_REQ |
 493                                               P2P_FLAG_HMODEL_REQ);
 494                 if (ret) {
 495                         ath6kl_dbg(ATH6KL_DBG_TRC,
 496                                    "failed to request P2P capabilities (%d) - assuming P2P not supported\n",
 497                                    ret);
 498                         ar->p2p = false;
 499                 }
 500         }
 501
 502         if (ar->p2p && (ar->vif_max == 1 || idx)) {
 503                 /* Enable Probe Request reporting for P2P */
 504                 ret = ath6kl_wmi_probe_report_req_cmd(ar->wmi, idx, true);
 505                 if (ret) {
 506                         ath6kl_dbg(ATH6KL_DBG_TRC,
 507                                    "failed to enable Probe Request reporting (%d)\n",
 508                                    ret);
 509                 }
 510         }
 511
 512         return ret;
 513 }
 514
 515 int ath6kl_configure_target(struct ath6kl *ar)
 516 {
 517         u32 param, ram_reserved_size;
 518         u8 fw_iftype, fw_mode = 0, fw_submode = 0;
 519         int i, status;
 520
 521         param = !!(ar->conf_flags & ATH6KL_CONF_UART_DEBUG);
 522         if (ath6kl_bmi_write_hi32(ar, hi_serial_enable, param)) {
 523                 ath6kl_err("bmi_write_memory for uart debug failed\n");
 524                 return -EIO;
 525         }
 526
 527         /*
 528          * Note: Even though the firmware interface type is
 529          * chosen as BSS_STA for all three interfaces, can
 530          * be configured to IBSS/AP as long as the fw submode
 531          * remains normal mode (0 - AP, STA and IBSS). But
 532          * due to an target assert in firmware only one interface is
 533          * configured for now.
 534          */
 535         fw_iftype = HI_OPTION_FW_MODE_BSS_STA;
 536
 537         for (i = 0; i < ar->vif_max; i++)
 538                 fw_mode |= fw_iftype << (i * HI_OPTION_FW_MODE_BITS);
 539
 540         /*
 541          * Submodes when fw does not support dynamic interface
 542          * switching:
 543          *              vif[0] - AP/STA/IBSS
 544          *              vif[1] - "P2P dev"/"P2P GO"/"P2P Client"
 545          *              vif[2] - "P2P dev"/"P2P GO"/"P2P Client"
 546          * Otherwise, All the interface are initialized to p2p dev.
 547          */
 548
 549         if (test_bit(ATH6KL_FW_CAPABILITY_STA_P2PDEV_DUPLEX,
 550                      ar->fw_capabilities)) {
 551                 for (i = 0; i < ar->vif_max; i++)
 552                         fw_submode |= HI_OPTION_FW_SUBMODE_P2PDEV <<
 553                                 (i * HI_OPTION_FW_SUBMODE_BITS);
 554         } else {
 555                 for (i = 0; i < ar->max_norm_iface; i++)
 556                         fw_submode |= HI_OPTION_FW_SUBMODE_NONE <<
 557                                 (i * HI_OPTION_FW_SUBMODE_BITS);
 558
 559                 for (i = ar->max_norm_iface; i < ar->vif_max; i++)
 560                         fw_submode |= HI_OPTION_FW_SUBMODE_P2PDEV <<
 561                                 (i * HI_OPTION_FW_SUBMODE_BITS);
 562
 563                 if (ar->p2p && ar->vif_max == 1)
 564                         fw_submode = HI_OPTION_FW_SUBMODE_P2PDEV;
 565         }
 566
 567         if (ath6kl_bmi_write_hi32(ar, hi_app_host_interest,
 568                                   HTC_PROTOCOL_VERSION) != 0) {
 569                 ath6kl_err("bmi_write_memory for htc version failed\n");
 570                 return -EIO;
 571         }
 572
 573         /* set the firmware mode to STA/IBSS/AP */
 574         param = 0;
 575
 576         if (ath6kl_bmi_read_hi32(ar, hi_option_flag, &param) != 0) {
 577                 ath6kl_err("bmi_read_memory for setting fwmode failed\n");
 578                 return -EIO;
 579         }
 580
 581         param |= (ar->vif_max << HI_OPTION_NUM_DEV_SHIFT);
 582         param |= fw_mode << HI_OPTION_FW_MODE_SHIFT;
 583         param |= fw_submode << HI_OPTION_FW_SUBMODE_SHIFT;
 584
 585         param |= (0 << HI_OPTION_MAC_ADDR_METHOD_SHIFT);
 586         param |= (0 << HI_OPTION_FW_BRIDGE_SHIFT);
 587
 588         if (ath6kl_bmi_write_hi32(ar, hi_option_flag, param) != 0) {
 589                 ath6kl_err("bmi_write_memory for setting fwmode failed\n");
 590                 return -EIO;
 591         }
 592
 593         ath6kl_dbg(ATH6KL_DBG_TRC, "firmware mode set\n");
 594
 595         /*
 596          * Hardcode the address use for the extended board data
 597          * Ideally this should be pre-allocate by the OS at boot time
 598          * But since it is a new feature and board data is loaded
 599          * at init time, we have to workaround this from host.
 600          * It is difficult to patch the firmware boot code,
 601          * but possible in theory.
 602          */
 603
 604         if (ar->target_type == TARGET_TYPE_AR6003) {
 605                 param = ar->hw.board_ext_data_addr;
 606                 ram_reserved_size = ar->hw.reserved_ram_size;
 607
 608                 if (ath6kl_bmi_write_hi32(ar, hi_board_ext_data, param) != 0) {
 609                         ath6kl_err("bmi_write_memory for hi_board_ext_data failed\n");
 610                         return -EIO;
 611                 }
 612
 613                 if (ath6kl_bmi_write_hi32(ar, hi_end_ram_reserve_sz,
 614                                           ram_reserved_size) != 0) {
 615                         ath6kl_err("bmi_write_memory for hi_end_ram_reserve_sz failed\n");
 616                         return -EIO;
 617                 }
 618         }
 619
 620         /* set the block size for the target */
 621         if (ath6kl_set_htc_params(ar, MBOX_YIELD_LIMIT, 0))
 622                 /* use default number of control buffers */
 623                 return -EIO;
 624
 625         /* Configure GPIO AR600x UART */
 626         status = ath6kl_bmi_write_hi32(ar, hi_dbg_uart_txpin,
 627                                        ar->hw.uarttx_pin);
 628         if (status)
 629                 return status;
 630
 631         /* Configure target refclk_hz */
 632         status = ath6kl_bmi_write_hi32(ar, hi_refclk_hz, ar->hw.refclk_hz);
 633         if (status)
 634                 return status;
 635
 636         return 0;
 637 }
 638
 639 /* firmware upload */
 640 static int ath6kl_get_fw(struct ath6kl *ar, const char *filename,
 641                          u8 **fw, size_t *fw_len)
 642 {
 643         const struct firmware *fw_entry;
 644         int ret;
 645
 646         ret = request_firmware(&fw_entry, filename, ar->dev);
 647         if (ret)
 648                 return ret;
 649
 650         *fw_len = fw_entry->size;
 651         *fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
 652
 653         if (*fw == NULL)
 654                 ret = -ENOMEM;
 655
 656         release_firmware(fw_entry);
 657
 658         return ret;
 659 }
 660
 661 #ifdef CONFIG_OF
 662 /*
 663  * Check the device tree for a board-id and use it to construct
 664  * the pathname to the firmware file.  Used (for now) to find a
 665  * fallback to the "bdata.bin" file--typically a symlink to the
 666  * appropriate board-specific file.
 667  */
 668 static bool check_device_tree(struct ath6kl *ar)
 669 {
 670         static const char *board_id_prop = "atheros,board-id";
 671         struct device_node *node;
 672         char board_filename[64];
 673         const char *board_id;
 674         int ret;
 675
 676         for_each_compatible_node(node, NULL, "atheros,ath6kl") {
 677                 board_id = of_get_property(node, board_id_prop, NULL);
 678                 if (board_id == NULL) {
 679                         ath6kl_warn("No \"%s\" property on %s node.\n",
 680                                     board_id_prop, node->name);
 681                         continue;
 682                 }
 683                 snprintf(board_filename, sizeof(board_filename),
 684                          "%s/bdata.%s.bin", ar->hw.fw.dir, board_id);
 685
 686                 ret = ath6kl_get_fw(ar, board_filename, &ar->fw_board,
 687                                     &ar->fw_board_len);
 688                 if (ret) {
 689                         ath6kl_err("Failed to get DT board file %s: %d\n",
 690                                    board_filename, ret);
 691                         continue;
 692                 }
 693                 return true;
 694         }
 695         return false;
 696 }
 697 #else
 698 static bool check_device_tree(struct ath6kl *ar)
 699 {
 700         return false;
 701 }
 702 #endif /* CONFIG_OF */
 703
 704 static int ath6kl_fetch_board_file(struct ath6kl *ar)
 705 {
 706         const char *filename;
 707         int ret;
 708
 709         if (ar->fw_board != NULL)
 710                 return 0;
 711
 712         if (WARN_ON(ar->hw.fw_board == NULL))
 713                 return -EINVAL;
 714
 715         filename = ar->hw.fw_board;
 716
 717         ret = ath6kl_get_fw(ar, filename, &ar->fw_board,
 718                             &ar->fw_board_len);
 719         if (ret == 0) {
 720                 /* managed to get proper board file */
 721                 return 0;
 722         }
 723
 724         if (check_device_tree(ar)) {
 725                 /* got board file from device tree */
 726                 return 0;
 727         }
 728
 729         /* there was no proper board file, try to use default instead */
 730         ath6kl_warn("Failed to get board file %s (%d), trying to find default board file.\n",
 731                     filename, ret);
 732
 733         filename = ar->hw.fw_default_board;
 734
 735         ret = ath6kl_get_fw(ar, filename, &ar->fw_board,
 736                             &ar->fw_board_len);
 737         if (ret) {
 738                 ath6kl_err("Failed to get default board file %s: %d\n",
 739                            filename, ret);
 740                 return ret;
 741         }
 742
 743         ath6kl_warn("WARNING! No proper board file was not found, instead using a default board file.\n");
 744         ath6kl_warn("Most likely your hardware won't work as specified. Install correct board file!\n");
 745
 746         return 0;
 747 }
 748
 749 static int ath6kl_fetch_otp_file(struct ath6kl *ar)
 750 {
 751         char filename[100];
 752         int ret;
 753
 754         if (ar->fw_otp != NULL)
 755                 return 0;
 756
 757         if (ar->hw.fw.otp == NULL) {
 758                 ath6kl_dbg(ATH6KL_DBG_BOOT,
 759                            "no OTP file configured for this hw\n");
 760                 return 0;
 761         }
 762
 763         snprintf(filename, sizeof(filename), "%s/%s",
 764                  ar->hw.fw.dir, ar->hw.fw.otp);
 765
 766         ret = ath6kl_get_fw(ar, filename, &ar->fw_otp,
 767                             &ar->fw_otp_len);
 768         if (ret) {
 769                 ath6kl_err("Failed to get OTP file %s: %d\n",
 770                            filename, ret);
 771                 return ret;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static int ath6kl_fetch_testmode_file(struct ath6kl *ar)
 778 {
 779         char filename[100];
 780         int ret;
 781
 782         if (ar->testmode == 0)
 783                 return 0;
 784
 785         ath6kl_dbg(ATH6KL_DBG_BOOT, "testmode %d\n", ar->testmode);
 786
 787         if (ar->testmode == 2) {
 788                 if (ar->hw.fw.utf == NULL) {
 789                         ath6kl_warn("testmode 2 not supported\n");
 790                         return -EOPNOTSUPP;
 791                 }
 792
 793                 snprintf(filename, sizeof(filename), "%s/%s",
 794                          ar->hw.fw.dir, ar->hw.fw.utf);
 795         } else {
 796                 if (ar->hw.fw.tcmd == NULL) {
 797                         ath6kl_warn("testmode 1 not supported\n");
 798                         return -EOPNOTSUPP;
 799                 }
 800
 801                 snprintf(filename, sizeof(filename), "%s/%s",
 802                          ar->hw.fw.dir, ar->hw.fw.tcmd);
 803         }
 804
 805         set_bit(TESTMODE, &ar->flag);
 806
 807         ret = ath6kl_get_fw(ar, filename, &ar->fw, &ar->fw_len);
 808         if (ret) {
 809                 ath6kl_err("Failed to get testmode %d firmware file %s: %d\n",
 810                            ar->testmode, filename, ret);
 811                 return ret;
 812         }
 813
 814         return 0;
 815 }
 816
 817 static int ath6kl_fetch_fw_file(struct ath6kl *ar)
 818 {
 819         char filename[100];
 820         int ret;
 821
 822         if (ar->fw != NULL)
 823                 return 0;
 824
 825         /* FIXME: remove WARN_ON() as we won't support FW API 1 for long */
 826         if (WARN_ON(ar->hw.fw.fw == NULL))
 827                 return -EINVAL;
 828
 829         snprintf(filename, sizeof(filename), "%s/%s",
 830                  ar->hw.fw.dir, ar->hw.fw.fw);
 831
 832         ret = ath6kl_get_fw(ar, filename, &ar->fw, &ar->fw_len);
 833         if (ret) {
 834                 ath6kl_err("Failed to get firmware file %s: %d\n",
 835                            filename, ret);
 836                 return ret;
 837         }
 838
 839         return 0;
 840 }
 841
 842 static int ath6kl_fetch_patch_file(struct ath6kl *ar)
 843 {
 844         char filename[100];
 845         int ret;
 846
 847         if (ar->fw_patch != NULL)
 848                 return 0;
 849
 850         if (ar->hw.fw.patch == NULL)
 851                 return 0;
 852
 853         snprintf(filename, sizeof(filename), "%s/%s",
 854                  ar->hw.fw.dir, ar->hw.fw.patch);
 855
 856         ret = ath6kl_get_fw(ar, filename, &ar->fw_patch,
 857                             &ar->fw_patch_len);
 858         if (ret) {
 859                 ath6kl_err("Failed to get patch file %s: %d\n",
 860                            filename, ret);
 861                 return ret;
 862         }
 863
 864         return 0;
 865 }
 866
 867 static int ath6kl_fetch_testscript_file(struct ath6kl *ar)
 868 {
 869         char filename[100];
 870         int ret;
 871
 872         if (ar->testmode != 2)
 873                 return 0;
 874
 875         if (ar->fw_testscript != NULL)
 876                 return 0;
 877
 878         if (ar->hw.fw.testscript == NULL)
 879                 return 0;
 880
 881         snprintf(filename, sizeof(filename), "%s/%s",
 882                  ar->hw.fw.dir, ar->hw.fw.testscript);
 883
 884         ret = ath6kl_get_fw(ar, filename, &ar->fw_testscript,
 885                                 &ar->fw_testscript_len);
 886         if (ret) {
 887                 ath6kl_err("Failed to get testscript file %s: %d\n",
 888                            filename, ret);
 889                 return ret;
 890         }
 891
 892         return 0;
 893 }
 894
 895 static int ath6kl_fetch_fw_api1(struct ath6kl *ar)
 896 {
 897         int ret;
 898
 899         ret = ath6kl_fetch_otp_file(ar);
 900         if (ret)
 901                 return ret;
 902
 903         ret = ath6kl_fetch_fw_file(ar);
 904         if (ret)
 905                 return ret;
 906
 907         ret = ath6kl_fetch_patch_file(ar);
 908         if (ret)
 909                 return ret;
 910
 911         ret = ath6kl_fetch_testscript_file(ar);
 912         if (ret)
 913                 return ret;
 914
 915         return 0;
 916 }
 917
 918 static int ath6kl_fetch_fw_apin(struct ath6kl *ar, const char *name)
 919 {
 920         size_t magic_len, len, ie_len;
 921         const struct firmware *fw;
 922         struct ath6kl_fw_ie *hdr;
 923         char filename[100];
 924         const u8 *data;
 925         int ret, ie_id, i, index, bit;
 926         __le32 *val;
 927
 928         snprintf(filename, sizeof(filename), "%s/%s", ar->hw.fw.dir, name);
 929
 930         ret = request_firmware(&fw, filename, ar->dev);
 931         if (ret)
 932                 return ret;
 933
 934         data = fw->data;
 935         len = fw->size;
 936
 937         /* magic also includes the null byte, check that as well */
 938         magic_len = strlen(ATH6KL_FIRMWARE_MAGIC) + 1;
 939
 940         if (len < magic_len) {
 941                 ret = -EINVAL;
 942                 goto out;
 943         }
 944
 945         if (memcmp(data, ATH6KL_FIRMWARE_MAGIC, magic_len) != 0) {
 946                 ret = -EINVAL;
 947                 goto out;
 948         }
 949
 950         len -= magic_len;
 951         data += magic_len;
 952
 953         /* loop elements */
 954         while (len > sizeof(struct ath6kl_fw_ie)) {
 955                 /* hdr is unaligned! */
 956                 hdr = (struct ath6kl_fw_ie *) data;
 957
 958                 ie_id = le32_to_cpup(&hdr->id);
 959                 ie_len = le32_to_cpup(&hdr->len);
 960
 961                 len -= sizeof(*hdr);
 962                 data += sizeof(*hdr);
 963
 964                 if (len < ie_len) {
 965                         ret = -EINVAL;
 966                         goto out;
 967                 }
 968
 969                 switch (ie_id) {
 970                 case ATH6KL_FW_IE_FW_VERSION:
 971                         strlcpy(ar->wiphy->fw_version, data,
 972                                 sizeof(ar->wiphy->fw_version));
 973
 974                         ath6kl_dbg(ATH6KL_DBG_BOOT,
 975                                    "found fw version %s\n",
 976                                     ar->wiphy->fw_version);
 977                         break;
 978                 case ATH6KL_FW_IE_OTP_IMAGE:
 979                         ath6kl_dbg(ATH6KL_DBG_BOOT, "found otp image ie (%zd B)\n",
 980                                    ie_len);
 981
 982                         ar->fw_otp = kmemdup(data, ie_len, GFP_KERNEL);
 983
 984                         if (ar->fw_otp == NULL) {
 985                                 ret = -ENOMEM;
 986                                 goto out;
 987                         }
 988
 989                         ar->fw_otp_len = ie_len;
 990                         break;
 991                 case ATH6KL_FW_IE_FW_IMAGE:
 992                         ath6kl_dbg(ATH6KL_DBG_BOOT, "found fw image ie (%zd B)\n",
 993                                    ie_len);
 994
 995                         /* in testmode we already might have a fw file */
 996                         if (ar->fw != NULL)
 997                                 break;
 998
 999                         ar->fw = vmalloc(ie_len);
1000
1001                         if (ar->fw == NULL) {
1002                                 ret = -ENOMEM;
1003                                 goto out;
1004                         }
1005
1006                         memcpy(ar->fw, data, ie_len);
1007                         ar->fw_len = ie_len;
1008                         break;
1009                 case ATH6KL_FW_IE_PATCH_IMAGE:
1010                         ath6kl_dbg(ATH6KL_DBG_BOOT, "found patch image ie (%zd B)\n",
1011                                    ie_len);
1012
1013                         ar->fw_patch = kmemdup(data, ie_len, GFP_KERNEL);
1014
1015                         if (ar->fw_patch == NULL) {
1016                                 ret = -ENOMEM;
1017                                 goto out;
1018                         }
1019
1020                         ar->fw_patch_len = ie_len;
1021                         break;
1022                 case ATH6KL_FW_IE_RESERVED_RAM_SIZE:
1023                         val = (__le32 *) data;
1024                         ar->hw.reserved_ram_size = le32_to_cpup(val);
1025
1026                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1027                                    "found reserved ram size ie 0x%d\n",
1028                                    ar->hw.reserved_ram_size);
1029                         break;
1030                 case ATH6KL_FW_IE_CAPABILITIES:
1031                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1032                                    "found firmware capabilities ie (%zd B)\n",
1033                                    ie_len);
1034
1035                         for (i = 0; i < ATH6KL_FW_CAPABILITY_MAX; i++) {
1036                                 index = i / 8;
1037                                 bit = i % 8;
1038
1039                                 if (index == ie_len)
1040                                         break;
1041
1042                                 if (data[index] & (1 << bit))
1043                                         __set_bit(i, ar->fw_capabilities);
1044                         }
1045
1046                         ath6kl_dbg_dump(ATH6KL_DBG_BOOT, "capabilities", "",
1047                                         ar->fw_capabilities,
1048                                         sizeof(ar->fw_capabilities));
1049                         break;
1050                 case ATH6KL_FW_IE_PATCH_ADDR:
1051                         if (ie_len != sizeof(*val))
1052                                 break;
1053
1054                         val = (__le32 *) data;
1055                         ar->hw.dataset_patch_addr = le32_to_cpup(val);
1056
1057                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1058                                    "found patch address ie 0x%x\n",
1059                                    ar->hw.dataset_patch_addr);
1060                         break;
1061                 case ATH6KL_FW_IE_BOARD_ADDR:
1062                         if (ie_len != sizeof(*val))
1063                                 break;
1064
1065                         val = (__le32 *) data;
1066                         ar->hw.board_addr = le32_to_cpup(val);
1067
1068                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1069                                    "found board address ie 0x%x\n",
1070                                    ar->hw.board_addr);
1071                         break;
1072                 case ATH6KL_FW_IE_VIF_MAX:
1073                         if (ie_len != sizeof(*val))
1074                                 break;
1075
1076                         val = (__le32 *) data;
1077                         ar->vif_max = min_t(unsigned int, le32_to_cpup(val),
1078                                             ATH6KL_VIF_MAX);
1079
1080                         if (ar->vif_max > 1 && !ar->p2p)
1081                                 ar->max_norm_iface = 2;
1082
1083                         ath6kl_dbg(ATH6KL_DBG_BOOT,
1084                                    "found vif max ie %d\n", ar->vif_max);
1085                         break;
1086                 default:
1087                         ath6kl_dbg(ATH6KL_DBG_BOOT, "Unknown fw ie: %u\n",
1088                                    le32_to_cpup(&hdr->id));
1089                         break;
1090                 }
1091
1092                 len -= ie_len;
1093                 data += ie_len;
1094         };
1095
1096         ret = 0;
1097 out:
1098         release_firmware(fw);
1099
1100         return ret;
1101 }
1102
1103 int ath6kl_init_fetch_firmwares(struct ath6kl *ar)
1104 {
1105         int ret;
1106
1107         ret = ath6kl_fetch_board_file(ar);
1108         if (ret)
1109                 return ret;
1110
1111         ret = ath6kl_fetch_testmode_file(ar);
1112         if (ret)
1113                 return ret;
1114
1115         ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API4_FILE);
1116         if (ret == 0) {
1117                 ar->fw_api = 4;
1118                 goto out;
1119         }
1120
1121         ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API3_FILE);
1122         if (ret == 0) {
1123                 ar->fw_api = 3;
1124                 goto out;
1125         }
1126
1127         ret = ath6kl_fetch_fw_apin(ar, ATH6KL_FW_API2_FILE);
1128         if (ret == 0) {
1129                 ar->fw_api = 2;
1130                 goto out;
1131         }
1132
1133         ret = ath6kl_fetch_fw_api1(ar);
1134         if (ret)
1135                 return ret;
1136
1137         ar->fw_api = 1;
1138
1139 out:
1140         ath6kl_dbg(ATH6KL_DBG_BOOT, "using fw api %d\n", ar->fw_api);
1141
1142         return 0;
1143 }
1144
1145 static int ath6kl_upload_board_file(struct ath6kl *ar)
1146 {
1147         u32 board_address, board_ext_address, param;
1148         u32 board_data_size, board_ext_data_size;
1149         int ret;
1150
1151         if (WARN_ON(ar->fw_board == NULL))
1152                 return -ENOENT;
1153
1154         /*
1155          * Determine where in Target RAM to write Board Data.
1156          * For AR6004, host determine Target RAM address for
1157          * writing board data.
1158          */
1159         if (ar->hw.board_addr != 0) {
1160                 board_address = ar->hw.board_addr;
1161                 ath6kl_bmi_write_hi32(ar, hi_board_data,
1162                                       board_address);
1163         } else {
1164                 ath6kl_bmi_read_hi32(ar, hi_board_data, &board_address);
1165         }
1166
1167         /* determine where in target ram to write extended board data */
1168         ath6kl_bmi_read_hi32(ar, hi_board_ext_data, &board_ext_address);
1169
1170         if (ar->target_type == TARGET_TYPE_AR6003 &&
1171             board_ext_address == 0) {
1172                 ath6kl_err("Failed to get board file target address.\n");
1173                 return -EINVAL;
1174         }
1175
1176         switch (ar->target_type) {
1177         case TARGET_TYPE_AR6003:
1178                 board_data_size = AR6003_BOARD_DATA_SZ;
1179                 board_ext_data_size = AR6003_BOARD_EXT_DATA_SZ;
1180                 if (ar->fw_board_len > (board_data_size + board_ext_data_size))
1181                         board_ext_data_size = AR6003_BOARD_EXT_DATA_SZ_V2;
1182                 break;
1183         case TARGET_TYPE_AR6004:
1184                 board_data_size = AR6004_BOARD_DATA_SZ;
1185                 board_ext_data_size = AR6004_BOARD_EXT_DATA_SZ;
1186                 break;
1187         default:
1188                 WARN_ON(1);
1189                 return -EINVAL;
1190                 break;
1191         }
1192
1193         if (board_ext_address &&
1194             ar->fw_board_len == (board_data_size + board_ext_data_size)) {
1195                 /* write extended board data */
1196                 ath6kl_dbg(ATH6KL_DBG_BOOT,
1197                            "writing extended board data to 0x%x (%d B)\n",
1198                            board_ext_address, board_ext_data_size);
1199
1200                 ret = ath6kl_bmi_write(ar, board_ext_address,
1201                                        ar->fw_board + board_data_size,
1202                                        board_ext_data_size);
1203                 if (ret) {
1204                         ath6kl_err("Failed to write extended board data: %d\n",
1205                                    ret);
1206                         return ret;
1207                 }
1208
1209                 /* record that extended board data is initialized */
1210                 param = (board_ext_data_size << 16) | 1;
1211
1212                 ath6kl_bmi_write_hi32(ar, hi_board_ext_data_config, param);
1213         }
1214
1215         if (ar->fw_board_len < board_data_size) {
1216                 ath6kl_err("Too small board file: %zu\n", ar->fw_board_len);
1217                 ret = -EINVAL;
1218                 return ret;
1219         }
1220
1221         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing board file to 0x%x (%d B)\n",
1222                    board_address, board_data_size);
1223
1224         ret = ath6kl_bmi_write(ar, board_address, ar->fw_board,
1225                                board_data_size);
1226
1227         if (ret) {
1228                 ath6kl_err("Board file bmi write failed: %d\n", ret);
1229                 return ret;
1230         }
1231
1232         /* record the fact that Board Data IS initialized */
1233         ath6kl_bmi_write_hi32(ar, hi_board_data_initialized, 1);
1234
1235         return ret;
1236 }
1237
1238 static int ath6kl_upload_otp(struct ath6kl *ar)
1239 {
1240         u32 address, param;
1241         bool from_hw = false;
1242         int ret;
1243
1244         if (ar->fw_otp == NULL)
1245                 return 0;
1246
1247         address = ar->hw.app_load_addr;
1248
1249         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing otp to 0x%x (%zd B)\n", address,
1250                    ar->fw_otp_len);
1251
1252         ret = ath6kl_bmi_fast_download(ar, address, ar->fw_otp,
1253                                        ar->fw_otp_len);
1254         if (ret) {
1255                 ath6kl_err("Failed to upload OTP file: %d\n", ret);
1256                 return ret;
1257         }
1258
1259         /* read firmware start address */
1260         ret = ath6kl_bmi_read_hi32(ar, hi_app_start, &address);
1261
1262         if (ret) {
1263                 ath6kl_err("Failed to read hi_app_start: %d\n", ret);
1264                 return ret;
1265         }
1266
1267         if (ar->hw.app_start_override_addr == 0) {
1268                 ar->hw.app_start_override_addr = address;
1269                 from_hw = true;
1270         }
1271
1272         ath6kl_dbg(ATH6KL_DBG_BOOT, "app_start_override_addr%s 0x%x\n",
1273                    from_hw ? " (from hw)" : "",
1274                    ar->hw.app_start_override_addr);
1275
1276         /* execute the OTP code */
1277         ath6kl_dbg(ATH6KL_DBG_BOOT, "executing OTP at 0x%x\n",
1278                    ar->hw.app_start_override_addr);
1279         param = 0;
1280         ath6kl_bmi_execute(ar, ar->hw.app_start_override_addr, &param);
1281
1282         return ret;
1283 }
1284
1285 static int ath6kl_upload_firmware(struct ath6kl *ar)
1286 {
1287         u32 address;
1288         int ret;
1289
1290         if (WARN_ON(ar->fw == NULL))
1291                 return 0;
1292
1293         address = ar->hw.app_load_addr;
1294
1295         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing firmware to 0x%x (%zd B)\n",
1296                    address, ar->fw_len);
1297
1298         ret = ath6kl_bmi_fast_download(ar, address, ar->fw, ar->fw_len);
1299
1300         if (ret) {
1301                 ath6kl_err("Failed to write firmware: %d\n", ret);
1302                 return ret;
1303         }
1304
1305         /*
1306          * Set starting address for firmware
1307          * Don't need to setup app_start override addr on AR6004
1308          */
1309         if (ar->target_type != TARGET_TYPE_AR6004) {
1310                 address = ar->hw.app_start_override_addr;
1311                 ath6kl_bmi_set_app_start(ar, address);
1312         }
1313         return ret;
1314 }
1315
1316 static int ath6kl_upload_patch(struct ath6kl *ar)
1317 {
1318         u32 address;
1319         int ret;
1320
1321         if (ar->fw_patch == NULL)
1322                 return 0;
1323
1324         address = ar->hw.dataset_patch_addr;
1325
1326         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing patch to 0x%x (%zd B)\n",
1327                    address, ar->fw_patch_len);
1328
1329         ret = ath6kl_bmi_write(ar, address, ar->fw_patch, ar->fw_patch_len);
1330         if (ret) {
1331                 ath6kl_err("Failed to write patch file: %d\n", ret);
1332                 return ret;
1333         }
1334
1335         ath6kl_bmi_write_hi32(ar, hi_dset_list_head, address);
1336
1337         return 0;
1338 }
1339
1340 static int ath6kl_upload_testscript(struct ath6kl *ar)
1341 {
1342         u32 address;
1343         int ret;
1344
1345         if (ar->testmode != 2)
1346                 return 0;
1347
1348         if (ar->fw_testscript == NULL)
1349                 return 0;
1350
1351         address = ar->hw.testscript_addr;
1352
1353         ath6kl_dbg(ATH6KL_DBG_BOOT, "writing testscript to 0x%x (%zd B)\n",
1354                    address, ar->fw_testscript_len);
1355
1356         ret = ath6kl_bmi_write(ar, address, ar->fw_testscript,
1357                 ar->fw_testscript_len);
1358         if (ret) {
1359                 ath6kl_err("Failed to write testscript file: %d\n", ret);
1360                 return ret;
1361         }
1362
1363         ath6kl_bmi_write_hi32(ar, hi_ota_testscript, address);
1364         ath6kl_bmi_write_hi32(ar, hi_end_ram_reserve_sz, 4096);
1365         ath6kl_bmi_write_hi32(ar, hi_test_apps_related, 1);
1366
1367         return 0;
1368 }
1369
1370 static int ath6kl_init_upload(struct ath6kl *ar)
1371 {
1372         u32 param, options, sleep, address;
1373         int status = 0;
1374
1375         if (ar->target_type != TARGET_TYPE_AR6003 &&
1376             ar->target_type != TARGET_TYPE_AR6004)
1377                 return -EINVAL;
1378
1379         /* temporarily disable system sleep */
1380         address = MBOX_BASE_ADDRESS + LOCAL_SCRATCH_ADDRESS;
1381         status = ath6kl_bmi_reg_read(ar, address, &param);
1382         if (status)
1383                 return status;
1384
1385         options = param;
1386
1387         param |= ATH6KL_OPTION_SLEEP_DISABLE;
1388         status = ath6kl_bmi_reg_write(ar, address, param);
1389         if (status)
1390                 return status;
1391
1392         address = RTC_BASE_ADDRESS + SYSTEM_SLEEP_ADDRESS;
1393         status = ath6kl_bmi_reg_read(ar, address, &param);
1394         if (status)
1395                 return status;
1396
1397         sleep = param;
1398
1399         param |= SM(SYSTEM_SLEEP_DISABLE, 1);
1400         status = ath6kl_bmi_reg_write(ar, address, param);
1401         if (status)
1402                 return status;
1403
1404         ath6kl_dbg(ATH6KL_DBG_TRC, "old options: %d, old sleep: %d\n",
1405                    options, sleep);
1406
1407         /* program analog PLL register */
1408         /* no need to control 40/44MHz clock on AR6004 */
1409         if (ar->target_type != TARGET_TYPE_AR6004) {
1410                 status = ath6kl_bmi_reg_write(ar, ATH6KL_ANALOG_PLL_REGISTER,
1411                                               0xF9104001);
1412
1413                 if (status)
1414                         return status;
1415
1416                 /* Run at 80/88MHz by default */
1417                 param = SM(CPU_CLOCK_STANDARD, 1);
1418
1419                 address = RTC_BASE_ADDRESS + CPU_CLOCK_ADDRESS;
1420                 status = ath6kl_bmi_reg_write(ar, address, param);
1421                 if (status)
1422                         return status;
1423         }
1424
1425         param = 0;
1426         address = RTC_BASE_ADDRESS + LPO_CAL_ADDRESS;
1427         param = SM(LPO_CAL_ENABLE, 1);
1428         status = ath6kl_bmi_reg_write(ar, address, param);
1429         if (status)
1430                 return status;
1431
1432         /* WAR to avoid SDIO CRC err */
1433         if (ar->hw.flags & ATH6KL_HW_SDIO_CRC_ERROR_WAR) {
1434                 ath6kl_err("temporary war to avoid sdio crc error\n");
1435
1436                 param = 0x28;
1437                 address = GPIO_BASE_ADDRESS + GPIO_PIN9_ADDRESS;
1438                 status = ath6kl_bmi_reg_write(ar, address, param);
1439                 if (status)
1440                         return status;
1441
1442                 param = 0x20;
1443
1444                 address = GPIO_BASE_ADDRESS + GPIO_PIN10_ADDRESS;
1445                 status = ath6kl_bmi_reg_write(ar, address, param);
1446                 if (status)
1447                         return status;
1448
1449                 address = GPIO_BASE_ADDRESS + GPIO_PIN11_ADDRESS;
1450                 status = ath6kl_bmi_reg_write(ar, address, param);
1451                 if (status)
1452                         return status;
1453
1454                 address = GPIO_BASE_ADDRESS + GPIO_PIN12_ADDRESS;
1455                 status = ath6kl_bmi_reg_write(ar, address, param);
1456                 if (status)
1457                         return status;
1458
1459                 address = GPIO_BASE_ADDRESS + GPIO_PIN13_ADDRESS;
1460                 status = ath6kl_bmi_reg_write(ar, address, param);
1461                 if (status)
1462                         return status;
1463         }
1464
1465         /* write EEPROM data to Target RAM */
1466         status = ath6kl_upload_board_file(ar);
1467         if (status)
1468                 return status;
1469
1470         /* transfer One time Programmable data */
1471         status = ath6kl_upload_otp(ar);
1472         if (status)
1473                 return status;
1474
1475         /* Download Target firmware */
1476         status = ath6kl_upload_firmware(ar);
1477         if (status)
1478                 return status;
1479
1480         status = ath6kl_upload_patch(ar);
1481         if (status)
1482                 return status;
1483
1484         /* Download the test script */
1485         status = ath6kl_upload_testscript(ar);
1486         if (status)
1487                 return status;
1488
1489         /* Restore system sleep */
1490         address = RTC_BASE_ADDRESS + SYSTEM_SLEEP_ADDRESS;
1491         status = ath6kl_bmi_reg_write(ar, address, sleep);
1492         if (status)
1493                 return status;
1494
1495         address = MBOX_BASE_ADDRESS + LOCAL_SCRATCH_ADDRESS;
1496         param = options | 0x20;
1497         status = ath6kl_bmi_reg_write(ar, address, param);
1498         if (status)
1499                 return status;
1500
1501         return status;
1502 }
1503
1504 int ath6kl_init_hw_params(struct ath6kl *ar)
1505 {
1506         const struct ath6kl_hw *uninitialized_var(hw);
1507         int i;
1508
1509         for (i = 0; i < ARRAY_SIZE(hw_list); i++) {
1510                 hw = &hw_list[i];
1511
1512                 if (hw->id == ar->version.target_ver)
1513                         break;
1514         }
1515
1516         if (i == ARRAY_SIZE(hw_list)) {
1517                 ath6kl_err("Unsupported hardware version: 0x%x\n",
1518                            ar->version.target_ver);
1519                 return -EINVAL;
1520         }
1521
1522         ar->hw = *hw;
1523
1524         ath6kl_dbg(ATH6KL_DBG_BOOT,
1525                    "target_ver 0x%x target_type 0x%x dataset_patch 0x%x app_load_addr 0x%x\n",
1526                    ar->version.target_ver, ar->target_type,
1527                    ar->hw.dataset_patch_addr, ar->hw.app_load_addr);
1528         ath6kl_dbg(ATH6KL_DBG_BOOT,
1529                    "app_start_override_addr 0x%x board_ext_data_addr 0x%x reserved_ram_size 0x%x",
1530                    ar->hw.app_start_override_addr, ar->hw.board_ext_data_addr,
1531                    ar->hw.reserved_ram_size);
1532         ath6kl_dbg(ATH6KL_DBG_BOOT,
1533                    "refclk_hz %d uarttx_pin %d",
1534                    ar->hw.refclk_hz, ar->hw.uarttx_pin);
1535
1536         return 0;
1537 }
1538
1539 static const char *ath6kl_init_get_hif_name(enum ath6kl_hif_type type)
1540 {
1541         switch (type) {
1542         case ATH6KL_HIF_TYPE_SDIO:
1543                 return "sdio";
1544         case ATH6KL_HIF_TYPE_USB:
1545                 return "usb";
1546         }
1547
1548         return NULL;
1549 }
1550
1551
1552 static const struct fw_capa_str_map {
1553         int id;
1554         const char *name;
1555 } fw_capa_map[] = {
1556         { ATH6KL_FW_CAPABILITY_HOST_P2P, "host-p2p" },
1557         { ATH6KL_FW_CAPABILITY_SCHED_SCAN, "sched-scan" },
1558         { ATH6KL_FW_CAPABILITY_STA_P2PDEV_DUPLEX, "sta-p2pdev-duplex" },
1559         { ATH6KL_FW_CAPABILITY_INACTIVITY_TIMEOUT, "inactivity-timeout" },
1560         { ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE, "rsn-cap-override" },
1561         { ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER, "wow-mc-filter" },
1562         { ATH6KL_FW_CAPABILITY_BMISS_ENHANCE, "bmiss-enhance" },
1563         { ATH6KL_FW_CAPABILITY_SCHED_SCAN_MATCH_LIST, "sscan-match-list" },
1564         { ATH6KL_FW_CAPABILITY_RSSI_SCAN_THOLD, "rssi-scan-thold" },
1565         { ATH6KL_FW_CAPABILITY_CUSTOM_MAC_ADDR, "custom-mac-addr" },
1566         { ATH6KL_FW_CAPABILITY_TX_ERR_NOTIFY, "tx-err-notify" },
1567         { ATH6KL_FW_CAPABILITY_REGDOMAIN, "regdomain" },
1568         { ATH6KL_FW_CAPABILITY_SCHED_SCAN_V2, "sched-scan-v2" },
1569         { ATH6KL_FW_CAPABILITY_HEART_BEAT_POLL, "hb-poll" },
1570 };
1571
1572 static const char *ath6kl_init_get_fw_capa_name(unsigned int id)
1573 {
1574         int i;
1575
1576         for (i = 0; i < ARRAY_SIZE(fw_capa_map); i++) {
1577                 if (fw_capa_map[i].id == id)
1578                         return fw_capa_map[i].name;
1579         }
1580
1581         return "<unknown>";
1582 }
1583
1584 static void ath6kl_init_get_fwcaps(struct ath6kl *ar, char *buf, size_t buf_len)
1585 {
1586         u8 *data = (u8 *) ar->fw_capabilities;
1587         size_t trunc_len, len = 0;
1588         int i, index, bit;
1589         char *trunc = "...";
1590
1591         for (i = 0; i < ATH6KL_FW_CAPABILITY_MAX; i++) {
1592                 index = i / 8;
1593                 bit = i % 8;
1594
1595                 if (index >= sizeof(ar->fw_capabilities) * 4)
1596                         break;
1597
1598                 if (buf_len - len < 4) {
1599                         ath6kl_warn("firmware capability buffer too small!\n");
1600
1601                         /* add "..." to the end of string */
1602                         trunc_len = strlen(trunc) + 1;
1603                         strncpy(buf + buf_len - trunc_len, trunc, trunc_len);
1604
1605                         return;
1606                 }
1607
1608                 if (data[index] & (1 << bit)) {
1609                         len += scnprintf(buf + len, buf_len - len, "%s,",
1610                                             ath6kl_init_get_fw_capa_name(i));
1611                 }
1612         }
1613
1614         /* overwrite the last comma */
1615         if (len > 0)
1616                 len--;
1617
1618         buf[len] = '\0';
1619 }
1620
1621 static int ath6kl_init_hw_reset(struct ath6kl *ar)
1622 {
1623         ath6kl_dbg(ATH6KL_DBG_BOOT, "cold resetting the device");
1624
1625         return ath6kl_diag_write32(ar, RESET_CONTROL_ADDRESS,
1626                                    cpu_to_le32(RESET_CONTROL_COLD_RST));
1627 }
1628
1629 static int __ath6kl_init_hw_start(struct ath6kl *ar)
1630 {
1631         long timeleft;
1632         int ret, i;
1633         char buf[200];
1634
1635         ath6kl_dbg(ATH6KL_DBG_BOOT, "hw start\n");
1636
1637         ret = ath6kl_hif_power_on(ar);
1638         if (ret)
1639                 return ret;
1640
1641         ret = ath6kl_configure_target(ar);
1642         if (ret)
1643                 goto err_power_off;
1644
1645         ret = ath6kl_init_upload(ar);
1646         if (ret)
1647                 goto err_power_off;
1648
1649         /* Do we need to finish the BMI phase */
1650         ret = ath6kl_bmi_done(ar);
1651         if (ret)
1652                 goto err_power_off;
1653
1654         /*
1655          * The reason we have to wait for the target here is that the
1656          * driver layer has to init BMI in order to set the host block
1657          * size.
1658          */
1659         ret = ath6kl_htc_wait_target(ar->htc_target);
1660
1661         if (ret == -ETIMEDOUT) {
1662                 /*
1663                  * Most likely USB target is in odd state after reboot and
1664                  * needs a reset. A cold reset makes the whole device
1665                  * disappear from USB bus and initialisation starts from
1666                  * beginning.
1667                  */
1668                 ath6kl_warn("htc wait target timed out, resetting device\n");
1669                 ath6kl_init_hw_reset(ar);
1670                 goto err_power_off;
1671         } else if (ret) {
1672                 ath6kl_err("htc wait target failed: %d\n", ret);
1673                 goto err_power_off;
1674         }
1675
1676         ret = ath6kl_init_service_ep(ar);
1677         if (ret) {
1678                 ath6kl_err("Endpoint service initilisation failed: %d\n", ret);
1679                 goto err_cleanup_scatter;
1680         }
1681
1682         /* setup credit distribution */
1683         ath6kl_htc_credit_setup(ar->htc_target, &ar->credit_state_info);
1684
1685         /* start HTC */
1686         ret = ath6kl_htc_start(ar->htc_target);
1687         if (ret) {
1688                 /* FIXME: call this */
1689                 ath6kl_cookie_cleanup(ar);
1690                 goto err_cleanup_scatter;
1691         }
1692
1693         /* Wait for Wmi event to be ready */
1694         timeleft = wait_event_interruptible_timeout(ar->event_wq,
1695                                                     test_bit(WMI_READY,
1696                                                              &ar->flag),
1697                                                     WMI_TIMEOUT);
1698         if (timeleft <= 0) {
1699                 clear_bit(WMI_READY, &ar->flag);
1700                 ath6kl_err("wmi is not ready or wait was interrupted: %ld\n",
1701                            timeleft);
1702                 ret = -EIO;
1703                 goto err_htc_stop;
1704         }
1705
1706         ath6kl_dbg(ATH6KL_DBG_BOOT, "firmware booted\n");
1707
1708         if (test_and_clear_bit(FIRST_BOOT, &ar->flag)) {
1709                 ath6kl_info("%s %s fw %s api %d%s\n",
1710                             ar->hw.name,
1711                             ath6kl_init_get_hif_name(ar->hif_type),
1712                             ar->wiphy->fw_version,
1713                             ar->fw_api,
1714                             test_bit(TESTMODE, &ar->flag) ? " testmode" : "");
1715                 ath6kl_init_get_fwcaps(ar, buf, sizeof(buf));
1716                 ath6kl_info("firmware supports: %s\n", buf);
1717         }
1718
1719         if (ar->version.abi_ver != ATH6KL_ABI_VERSION) {
1720                 ath6kl_err("abi version mismatch: host(0x%x), target(0x%x)\n",
1721                            ATH6KL_ABI_VERSION, ar->version.abi_ver);
1722                 ret = -EIO;
1723                 goto err_htc_stop;
1724         }
1725
1726         ath6kl_dbg(ATH6KL_DBG_TRC, "%s: wmi is ready\n", __func__);
1727
1728         /* communicate the wmi protocol verision to the target */
1729         /* FIXME: return error */
1730         if ((ath6kl_set_host_app_area(ar)) != 0)
1731                 ath6kl_err("unable to set the host app area\n");
1732
1733         for (i = 0; i < ar->vif_max; i++) {
1734                 ret = ath6kl_target_config_wlan_params(ar, i);
1735                 if (ret)
1736                         goto err_htc_stop;
1737         }
1738
1739         return 0;
1740
1741 err_htc_stop:
1742         ath6kl_htc_stop(ar->htc_target);
1743 err_cleanup_scatter:
1744         ath6kl_hif_cleanup_scatter(ar);
1745 err_power_off:
1746         ath6kl_hif_power_off(ar);
1747
1748         return ret;
1749 }
1750
1751 int ath6kl_init_hw_start(struct ath6kl *ar)
1752 {
1753         int err;
1754
1755         err = __ath6kl_init_hw_start(ar);
1756         if (err)
1757                 return err;
1758         ar->state = ATH6KL_STATE_ON;
1759         return 0;
1760 }
1761
1762 static int __ath6kl_init_hw_stop(struct ath6kl *ar)
1763 {
1764         int ret;
1765
1766         ath6kl_dbg(ATH6KL_DBG_BOOT, "hw stop\n");
1767
1768         ath6kl_htc_stop(ar->htc_target);
1769
1770         ath6kl_hif_stop(ar);
1771
1772         ath6kl_bmi_reset(ar);
1773
1774         ret = ath6kl_hif_power_off(ar);
1775         if (ret)
1776                 ath6kl_warn("failed to power off hif: %d\n", ret);
1777
1778         return 0;
1779 }
1780
1781 int ath6kl_init_hw_stop(struct ath6kl *ar)
1782 {
1783         int err;
1784
1785         err = __ath6kl_init_hw_stop(ar);
1786         if (err)
1787                 return err;
1788         ar->state = ATH6KL_STATE_OFF;
1789         return 0;
1790 }
1791
1792 void ath6kl_init_hw_restart(struct ath6kl *ar)
1793 {
1794         clear_bit(WMI_READY, &ar->flag);
1795
1796         ath6kl_cfg80211_stop_all(ar);
1797
1798         if (__ath6kl_init_hw_stop(ar)) {
1799                 ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Failed to stop during fw error recovery\n");
1800                 return;
1801         }
1802
1803         if (__ath6kl_init_hw_start(ar)) {
1804                 ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Failed to restart during fw error recovery\n");
1805                 return;
1806         }
1807 }
1808
1809 void ath6kl_stop_txrx(struct ath6kl *ar)
1810 {
1811         struct ath6kl_vif *vif, *tmp_vif;
1812         int i;
1813
1814         set_bit(DESTROY_IN_PROGRESS, &ar->flag);
1815
1816         if (down_interruptible(&ar->sem)) {
1817                 ath6kl_err("down_interruptible failed\n");
1818                 return;
1819         }
1820
1821         for (i = 0; i < AP_MAX_NUM_STA; i++)
1822                 aggr_reset_state(ar->sta_list[i].aggr_conn);
1823
1824         spin_lock_bh(&ar->list_lock);
1825         list_for_each_entry_safe(vif, tmp_vif, &ar->vif_list, list) {
1826                 list_del(&vif->list);
1827                 spin_unlock_bh(&ar->list_lock);
1828                 ath6kl_cfg80211_vif_stop(vif, test_bit(WMI_READY, &ar->flag));
1829                 rtnl_lock();
1830                 ath6kl_cfg80211_vif_cleanup(vif);
1831                 rtnl_unlock();
1832                 spin_lock_bh(&ar->list_lock);
1833         }
1834         spin_unlock_bh(&ar->list_lock);
1835
1836         clear_bit(WMI_READY, &ar->flag);
1837
1838         if (ar->fw_recovery.enable)
1839                 del_timer_sync(&ar->fw_recovery.hb_timer);
1840
1841         /*
1842          * After wmi_shudown all WMI events will be dropped. We
1843          * need to cleanup the buffers allocated in AP mode and
1844          * give disconnect notification to stack, which usually
1845          * happens in the disconnect_event. Simulate the disconnect
1846          * event by calling the function directly. Sometimes
1847          * disconnect_event will be received when the debug logs
1848          * are collected.
1849          */
1850         ath6kl_wmi_shutdown(ar->wmi);
1851
1852         clear_bit(WMI_ENABLED, &ar->flag);
1853         if (ar->htc_target) {
1854                 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
1855                 ath6kl_htc_stop(ar->htc_target);
1856         }
1857
1858         /*
1859          * Try to reset the device if we can. The driver may have been
1860          * configure NOT to reset the target during a debug session.
1861          */
1862         ath6kl_init_hw_reset(ar);
1863
1864         up(&ar->sem);
1865 }
1866 EXPORT_SYMBOL(ath6kl_stop_txrx);