drivers/net/wireless/ath/ath9k/htc.h

   1 /*
   2  * Copyright (c) 2010-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef HTC_H
  18 #define HTC_H
  19
  20 #include <linux/module.h>
  21 #include <linux/usb.h>
  22 #include <linux/firmware.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/leds.h>
  26 #include <linux/slab.h>
  27 #include <net/mac80211.h>
  28
  29 #include "common.h"
  30 #include "htc_hst.h"
  31 #include "hif_usb.h"
  32 #include "wmi.h"
  33
  34 #define ATH_STA_SHORT_CALINTERVAL 1000    /* 1 second */
  35 #define ATH_AP_SHORT_CALINTERVAL  100     /* 100 ms */
  36 #define ATH_ANI_POLLINTERVAL      100     /* 100 ms */
  37 #define ATH_LONG_CALINTERVAL      30000   /* 30 seconds */
  38 #define ATH_RESTART_CALINTERVAL   1200000 /* 20 minutes */
  39
  40 #define ATH_DEFAULT_BMISS_LIMIT 10
  41 #define IEEE80211_MS_TO_TU(x)   (((x) * 1000) / 1024)
  42 #define TSF_TO_TU(_h, _l) \
  43         ((((u32)(_h)) << 22) | (((u32)(_l)) >> 10))
  44
  45 extern struct ieee80211_ops ath9k_htc_ops;
  46 extern int htc_modparam_nohwcrypt;
  47
  48 enum htc_phymode {
  49         HTC_MODE_11NA           = 0,
  50         HTC_MODE_11NG           = 1
  51 };
  52
  53 enum htc_opmode {
  54         HTC_M_STA       = 1,
  55         HTC_M_IBSS      = 0,
  56         HTC_M_AHDEMO    = 3,
  57         HTC_M_HOSTAP    = 6,
  58         HTC_M_MONITOR   = 8,
  59         HTC_M_WDS       = 2
  60 };
  61
  62 #define ATH9K_HTC_AMPDU  1
  63 #define ATH9K_HTC_NORMAL 2
  64 #define ATH9K_HTC_BEACON 3
  65 #define ATH9K_HTC_MGMT   4
  66
  67 #define ATH9K_HTC_TX_CTSONLY      0x1
  68 #define ATH9K_HTC_TX_RTSCTS       0x2
  69
  70 struct tx_frame_hdr {
  71         u8 data_type;
  72         u8 node_idx;
  73         u8 vif_idx;
  74         u8 tidno;
  75         __be32 flags; /* ATH9K_HTC_TX_* */
  76         u8 key_type;
  77         u8 keyix;
  78         u8 cookie;
  79         u8 pad;
  80 } __packed;
  81
  82 struct tx_mgmt_hdr {
  83         u8 node_idx;
  84         u8 vif_idx;
  85         u8 tidno;
  86         u8 flags;
  87         u8 key_type;
  88         u8 keyix;
  89         u8 cookie;
  90         u8 pad;
  91 } __packed;
  92
  93 struct tx_beacon_header {
  94         u8 vif_index;
  95         u8 len_changed;
  96         u16 rev;
  97 } __packed;
  98
  99 #define MAX_TX_AMPDU_SUBFRAMES_9271 17
 100 #define MAX_TX_AMPDU_SUBFRAMES_7010 22
 101
 102 struct ath9k_htc_cap_target {
 103         __be32 ampdu_limit;
 104         u8 ampdu_subframes;
 105         u8 enable_coex;
 106         u8 tx_chainmask;
 107         u8 pad;
 108 } __packed;
 109
 110 struct ath9k_htc_target_vif {
 111         u8 index;
 112         u8 opmode;
 113         u8 myaddr[ETH_ALEN];
 114         u8 ath_cap;
 115         __be16 rtsthreshold;
 116         u8 pad;
 117 } __packed;
 118
 119 struct ath9k_htc_target_sta {
 120         u8 macaddr[ETH_ALEN];
 121         u8 bssid[ETH_ALEN];
 122         u8 sta_index;
 123         u8 vif_index;
 124         u8 is_vif_sta;
 125         __be16 flags;
 126         __be16 htcap;
 127         __be16 maxampdu;
 128         u8 pad;
 129 } __packed;
 130
 131 struct ath9k_htc_target_aggr {
 132         u8 sta_index;
 133         u8 tidno;
 134         u8 aggr_enable;
 135         u8 padding;
 136 } __packed;
 137
 138 #define ATH_HTC_RATE_MAX 30
 139
 140 #define WLAN_RC_DS_FLAG  0x01
 141 #define WLAN_RC_40_FLAG  0x02
 142 #define WLAN_RC_SGI_FLAG 0x04
 143 #define WLAN_RC_HT_FLAG  0x08
 144
 145 struct ath9k_htc_rateset {
 146         u8 rs_nrates;
 147         u8 rs_rates[ATH_HTC_RATE_MAX];
 148 };
 149
 150 struct ath9k_htc_rate {
 151         struct ath9k_htc_rateset legacy_rates;
 152         struct ath9k_htc_rateset ht_rates;
 153 } __packed;
 154
 155 struct ath9k_htc_target_rate {
 156         u8 sta_index;
 157         u8 isnew;
 158         __be32 capflags;
 159         struct ath9k_htc_rate rates;
 160 };
 161
 162 struct ath9k_htc_target_rate_mask {
 163         u8 vif_index;
 164         u8 band;
 165         __be32 mask;
 166         u16 pad;
 167 } __packed;
 168
 169 struct ath9k_htc_target_int_stats {
 170         __be32 rx;
 171         __be32 rxorn;
 172         __be32 rxeol;
 173         __be32 txurn;
 174         __be32 txto;
 175         __be32 cst;
 176 } __packed;
 177
 178 struct ath9k_htc_target_tx_stats {
 179         __be32 xretries;
 180         __be32 fifoerr;
 181         __be32 filtered;
 182         __be32 timer_exp;
 183         __be32 shortretries;
 184         __be32 longretries;
 185         __be32 qnull;
 186         __be32 encap_fail;
 187         __be32 nobuf;
 188 } __packed;
 189
 190 struct ath9k_htc_target_rx_stats {
 191         __be32 nobuf;
 192         __be32 host_send;
 193         __be32 host_done;
 194 } __packed;
 195
 196 #define ATH9K_HTC_MAX_VIF 2
 197 #define ATH9K_HTC_MAX_BCN_VIF 2
 198
 199 #define INC_VIF(_priv, _type) do {              \
 200                 switch (_type) {                \
 201                 case NL80211_IFTYPE_STATION:    \
 202                         _priv->num_sta_vif++;   \
 203                         break;                  \
 204                 case NL80211_IFTYPE_ADHOC:      \
 205                         _priv->num_ibss_vif++;  \
 206                         break;                  \
 207                 case NL80211_IFTYPE_AP:         \
 208                         _priv->num_ap_vif++;    \
 209                         break;                  \
 210                 default:                        \
 211                         break;                  \
 212                 }                               \
 213         } while (0)
 214
 215 #define DEC_VIF(_priv, _type) do {              \
 216                 switch (_type) {                \
 217                 case NL80211_IFTYPE_STATION:    \
 218                         _priv->num_sta_vif--;   \
 219                         break;                  \
 220                 case NL80211_IFTYPE_ADHOC:      \
 221                         _priv->num_ibss_vif--;  \
 222                         break;                  \
 223                 case NL80211_IFTYPE_AP:         \
 224                         _priv->num_ap_vif--;    \
 225                         break;                  \
 226                 default:                        \
 227                         break;                  \
 228                 }                               \
 229         } while (0)
 230
 231 struct ath9k_htc_vif {
 232         u8 index;
 233         u16 seq_no;
 234         bool beacon_configured;
 235         int bslot;
 236         __le64 tsfadjust;
 237 };
 238
 239 struct ath9k_vif_iter_data {
 240         const u8 *hw_macaddr;
 241         u8 mask[ETH_ALEN];
 242 };
 243
 244 #define ATH9K_HTC_MAX_STA 8
 245 #define ATH9K_HTC_MAX_TID 8
 246
 247 enum tid_aggr_state {
 248         AGGR_STOP = 0,
 249         AGGR_PROGRESS,
 250         AGGR_START,
 251         AGGR_OPERATIONAL
 252 };
 253
 254 struct ath9k_htc_sta {
 255         u8 index;
 256         enum tid_aggr_state tid_state[ATH9K_HTC_MAX_TID];
 257 };
 258
 259 #define ATH9K_HTC_RXBUF 256
 260 #define HTC_RX_FRAME_HEADER_SIZE 40
 261
 262 struct ath9k_htc_rxbuf {
 263         bool in_process;
 264         struct sk_buff *skb;
 265         struct ath_htc_rx_status rxstatus;
 266         struct list_head list;
 267 };
 268
 269 struct ath9k_htc_rx {
 270         int last_rssi; /* FIXME: per-STA */
 271         struct list_head rxbuf;
 272         spinlock_t rxbuflock;
 273 };
 274
 275 #define ATH9K_HTC_TX_CLEANUP_INTERVAL 50 /* ms */
 276 #define ATH9K_HTC_TX_TIMEOUT_INTERVAL 3000 /* ms */
 277 #define ATH9K_HTC_TX_RESERVE 10
 278 #define ATH9K_HTC_TX_TIMEOUT_COUNT 40
 279 #define ATH9K_HTC_TX_THRESHOLD (MAX_TX_BUF_NUM - ATH9K_HTC_TX_RESERVE)
 280
 281 #define ATH9K_HTC_OP_TX_QUEUES_STOP BIT(0)
 282 #define ATH9K_HTC_OP_TX_DRAIN       BIT(1)
 283
 284 struct ath9k_htc_tx {
 285         u8 flags;
 286         int queued_cnt;
 287         struct sk_buff_head mgmt_ep_queue;
 288         struct sk_buff_head cab_ep_queue;
 289         struct sk_buff_head data_be_queue;
 290         struct sk_buff_head data_bk_queue;
 291         struct sk_buff_head data_vi_queue;
 292         struct sk_buff_head data_vo_queue;
 293         struct sk_buff_head tx_failed;
 294         DECLARE_BITMAP(tx_slot, MAX_TX_BUF_NUM);
 295         struct timer_list cleanup_timer;
 296         spinlock_t tx_lock;
 297 };
 298
 299 struct ath9k_htc_tx_ctl {
 300         u8 type; /* ATH9K_HTC_* */
 301         u8 epid;
 302         u8 txok;
 303         u8 sta_idx;
 304         unsigned long timestamp;
 305 };
 306
 307 static inline struct ath9k_htc_tx_ctl *HTC_SKB_CB(struct sk_buff *skb)
 308 {
 309         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 310
 311         BUILD_BUG_ON(sizeof(struct ath9k_htc_tx_ctl) >
 312                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 313         return (struct ath9k_htc_tx_ctl *) &tx_info->driver_data;
 314 }
 315
 316 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
 317
 318 #define TX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.tx_stats.c++)
 319 #define RX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.rx_stats.c++)
 320 #define CAB_STAT_INC   priv->debug.tx_stats.cab_queued++
 321
 322 #define TX_QSTAT_INC(q) (priv->debug.tx_stats.queue_stats[q]++)
 323
 324 void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv,
 325                            struct ath_htc_rx_status *rxs);
 326
 327 struct ath_tx_stats {
 328         u32 buf_queued;
 329         u32 buf_completed;
 330         u32 skb_queued;
 331         u32 skb_success;
 332         u32 skb_failed;
 333         u32 cab_queued;
 334         u32 queue_stats[WME_NUM_AC];
 335 };
 336
 337 struct ath_rx_stats {
 338         u32 skb_allocated;
 339         u32 skb_completed;
 340         u32 skb_dropped;
 341         u32 err_crc;
 342         u32 err_decrypt_crc;
 343         u32 err_mic;
 344         u32 err_pre_delim;
 345         u32 err_post_delim;
 346         u32 err_decrypt_busy;
 347         u32 err_phy;
 348         u32 err_phy_stats[ATH9K_PHYERR_MAX];
 349 };
 350
 351 struct ath9k_debug {
 352         struct dentry *debugfs_phy;
 353         struct ath_tx_stats tx_stats;
 354         struct ath_rx_stats rx_stats;
 355 };
 356
 357 #else
 358
 359 #define TX_STAT_INC(c) do { } while (0)
 360 #define RX_STAT_INC(c) do { } while (0)
 361 #define CAB_STAT_INC   do { } while (0)
 362
 363 #define TX_QSTAT_INC(c) do { } while (0)
 364
 365 static inline void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv,
 366                                          struct ath_htc_rx_status *rxs)
 367 {
 368 }
 369
 370 #endif /* CONFIG_ATH9K_HTC_DEBUGFS */
 371
 372 #define ATH_LED_PIN_DEF             1
 373 #define ATH_LED_PIN_9287            10
 374 #define ATH_LED_PIN_9271            15
 375 #define ATH_LED_PIN_7010            12
 376
 377 #define BSTUCK_THRESHOLD 10
 378
 379 /*
 380  * Adjust these when the max. no of beaconing interfaces is
 381  * increased.
 382  */
 383 #define DEFAULT_SWBA_RESPONSE 40 /* in TUs */
 384 #define MIN_SWBA_RESPONSE     10 /* in TUs */
 385
 386 struct htc_beacon_config {
 387         struct ieee80211_vif *bslot[ATH9K_HTC_MAX_BCN_VIF];
 388         u16 beacon_interval;
 389         u16 dtim_period;
 390         u16 bmiss_timeout;
 391         u32 bmiss_cnt;
 392 };
 393
 394 struct ath_btcoex {
 395         u32 bt_priority_cnt;
 396         unsigned long bt_priority_time;
 397         int bt_stomp_type; /* Types of BT stomping */
 398         u32 btcoex_no_stomp;
 399         u32 btcoex_period;
 400         u32 btscan_no_stomp;
 401 };
 402
 403 void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv);
 404 void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv);
 405 void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv);
 406
 407 #define OP_INVALID                 BIT(0)
 408 #define OP_SCANNING                BIT(1)
 409 #define OP_ENABLE_BEACON           BIT(2)
 410 #define OP_BT_PRIORITY_DETECTED    BIT(3)
 411 #define OP_BT_SCAN                 BIT(4)
 412 #define OP_ANI_RUNNING             BIT(5)
 413 #define OP_TSF_RESET               BIT(6)
 414
 415 struct ath9k_htc_priv {
 416         struct device *dev;
 417         struct ieee80211_hw *hw;
 418         struct ath_hw *ah;
 419         struct htc_target *htc;
 420         struct wmi *wmi;
 421
 422         u16 fw_version_major;
 423         u16 fw_version_minor;
 424
 425         enum htc_endpoint_id wmi_cmd_ep;
 426         enum htc_endpoint_id beacon_ep;
 427         enum htc_endpoint_id cab_ep;
 428         enum htc_endpoint_id uapsd_ep;
 429         enum htc_endpoint_id mgmt_ep;
 430         enum htc_endpoint_id data_be_ep;
 431         enum htc_endpoint_id data_bk_ep;
 432         enum htc_endpoint_id data_vi_ep;
 433         enum htc_endpoint_id data_vo_ep;
 434
 435         u8 vif_slot;
 436         u8 mon_vif_idx;
 437         u8 sta_slot;
 438         u8 vif_sta_pos[ATH9K_HTC_MAX_VIF];
 439         u8 num_ibss_vif;
 440         u8 num_sta_vif;
 441         u8 num_sta_assoc_vif;
 442         u8 num_ap_vif;
 443
 444         u16 op_flags;
 445         u16 curtxpow;
 446         u16 txpowlimit;
 447         u16 nvifs;
 448         u16 nstations;
 449         bool rearm_ani;
 450         bool reconfig_beacon;
 451         unsigned int rxfilter;
 452
 453         struct ath9k_hw_cal_data caldata;
 454         struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
 455
 456         spinlock_t beacon_lock;
 457         struct htc_beacon_config cur_beacon_conf;
 458
 459         struct ath9k_htc_rx rx;
 460         struct ath9k_htc_tx tx;
 461
 462         struct tasklet_struct swba_tasklet;
 463         struct tasklet_struct rx_tasklet;
 464         struct delayed_work ani_work;
 465         struct tasklet_struct tx_failed_tasklet;
 466         struct work_struct ps_work;
 467         struct work_struct fatal_work;
 468
 469         struct mutex htc_pm_lock;
 470         unsigned long ps_usecount;
 471         bool ps_enabled;
 472         bool ps_idle;
 473
 474 #ifdef CONFIG_MAC80211_LEDS
 475         enum led_brightness brightness;
 476         bool led_registered;
 477         char led_name[32];
 478         struct led_classdev led_cdev;
 479         struct work_struct led_work;
 480 #endif
 481
 482         int beaconq;
 483         int cabq;
 484         int hwq_map[WME_NUM_AC];
 485
 486         struct ath_btcoex btcoex;
 487         struct delayed_work coex_period_work;
 488         struct delayed_work duty_cycle_work;
 489 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
 490         struct ath9k_debug debug;
 491 #endif
 492         struct mutex mutex;
 493 };
 494
 495 static inline void ath_read_cachesize(struct ath_common *common, int *csz)
 496 {
 497         common->bus_ops->read_cachesize(common, csz);
 498 }
 499
 500 void ath9k_htc_reset(struct ath9k_htc_priv *priv);
 501
 502 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
 503                             struct ieee80211_vif *vif);
 504 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
 505                             struct ieee80211_vif *vif);
 506 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv,
 507                              struct ieee80211_vif *vif);
 508 void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv);
 509 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
 510                              struct ieee80211_vif *vif);
 511 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv);
 512 void ath9k_htc_swba(struct ath9k_htc_priv *priv,
 513                     struct wmi_event_swba *swba);
 514
 515 void ath9k_htc_rxep(void *priv, struct sk_buff *skb,
 516                     enum htc_endpoint_id ep_id);
 517 void ath9k_htc_txep(void *priv, struct sk_buff *skb, enum htc_endpoint_id ep_id,
 518                     bool txok);
 519 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
 520                         enum htc_endpoint_id ep_id, bool txok);
 521
 522 int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv,
 523                                 u8 enable_coex);
 524 void ath9k_htc_station_work(struct work_struct *work);
 525 void ath9k_htc_aggr_work(struct work_struct *work);
 526 void ath9k_htc_ani_work(struct work_struct *work);
 527 void ath9k_htc_start_ani(struct ath9k_htc_priv *priv);
 528 void ath9k_htc_stop_ani(struct ath9k_htc_priv *priv);
 529
 530 int ath9k_tx_init(struct ath9k_htc_priv *priv);
 531 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv,
 532                        struct sk_buff *skb, u8 slot, bool is_cab);
 533 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv);
 534 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype);
 535 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv);
 536 int get_hw_qnum(u16 queue, int *hwq_map);
 537 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
 538                        struct ath9k_tx_queue_info *qinfo);
 539 void ath9k_htc_check_stop_queues(struct ath9k_htc_priv *priv);
 540 void ath9k_htc_check_wake_queues(struct ath9k_htc_priv *priv);
 541 int ath9k_htc_tx_get_slot(struct ath9k_htc_priv *priv);
 542 void ath9k_htc_tx_clear_slot(struct ath9k_htc_priv *priv, int slot);
 543 void ath9k_htc_tx_drain(struct ath9k_htc_priv *priv);
 544 void ath9k_htc_txstatus(struct ath9k_htc_priv *priv, void *wmi_event);
 545 void ath9k_htc_tx_failed(struct ath9k_htc_priv *priv);
 546 void ath9k_tx_failed_tasklet(unsigned long data);
 547 void ath9k_htc_tx_cleanup_timer(unsigned long data);
 548
 549 int ath9k_rx_init(struct ath9k_htc_priv *priv);
 550 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv);
 551 void ath9k_host_rx_init(struct ath9k_htc_priv *priv);
 552 void ath9k_rx_tasklet(unsigned long data);
 553 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv);
 554
 555 void ath9k_htc_ps_wakeup(struct ath9k_htc_priv *priv);
 556 void ath9k_htc_ps_restore(struct ath9k_htc_priv *priv);
 557 void ath9k_ps_work(struct work_struct *work);
 558 bool ath9k_htc_setpower(struct ath9k_htc_priv *priv,
 559                         enum ath9k_power_mode mode);
 560
 561 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv);
 562 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw);
 563 void ath9k_htc_radio_enable(struct ieee80211_hw *hw);
 564 void ath9k_htc_radio_disable(struct ieee80211_hw *hw);
 565
 566 #ifdef CONFIG_MAC80211_LEDS
 567 void ath9k_init_leds(struct ath9k_htc_priv *priv);
 568 void ath9k_deinit_leds(struct ath9k_htc_priv *priv);
 569 void ath9k_led_work(struct work_struct *work);
 570 #else
 571 static inline void ath9k_init_leds(struct ath9k_htc_priv *priv)
 572 {
 573 }
 574
 575 static inline void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
 576 {
 577 }
 578
 579 static inline void ath9k_led_work(struct work_struct *work)
 580 {
 581 }
 582 #endif
 583
 584 int ath9k_htc_probe_device(struct htc_target *htc_handle, struct device *dev,
 585                            u16 devid, char *product, u32 drv_info);
 586 void ath9k_htc_disconnect_device(struct htc_target *htc_handle, bool hotunplug);
 587 #ifdef CONFIG_PM
 588 void ath9k_htc_suspend(struct htc_target *htc_handle);
 589 int ath9k_htc_resume(struct htc_target *htc_handle);
 590 #endif
 591 #ifdef CONFIG_ATH9K_HTC_DEBUGFS
 592 int ath9k_htc_init_debug(struct ath_hw *ah);
 593 #else
 594 static inline int ath9k_htc_init_debug(struct ath_hw *ah) { return 0; };
 595 #endif /* CONFIG_ATH9K_HTC_DEBUGFS */
 596
 597 #endif /* HTC_H */