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/etherdevice.h> 26 #include <linux/leds.h> 27 #include <linux/slab.h> 28 #include <net/mac80211.h> 29 30 #include "common.h" 31 #include "htc_hst.h" 32 #include "hif_usb.h" 33 #include "wmi.h" 34 35 #define ATH_STA_SHORT_CALINTERVAL 1000 /* 1 second */ 36 #define ATH_AP_SHORT_CALINTERVAL 100 /* 100 ms */ 37 #define ATH_ANI_POLLINTERVAL 100 /* 100 ms */ 38 #define ATH_LONG_CALINTERVAL 30000 /* 30 seconds */ 39 #define ATH_RESTART_CALINTERVAL 1200000 /* 20 minutes */ 40 41 #define ATH_DEFAULT_BMISS_LIMIT 10 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 #define ATH_RC_TX_STBC_FLAG 0x20 145 146 struct ath9k_htc_rateset { 147 u8 rs_nrates; 148 u8 rs_rates[ATH_HTC_RATE_MAX]; 149 }; 150 151 struct ath9k_htc_rate { 152 struct ath9k_htc_rateset legacy_rates; 153 struct ath9k_htc_rateset ht_rates; 154 } __packed; 155 156 struct ath9k_htc_target_rate { 157 u8 sta_index; 158 u8 isnew; 159 __be32 capflags; 160 struct ath9k_htc_rate rates; 161 }; 162 163 struct ath9k_htc_target_rate_mask { 164 u8 vif_index; 165 u8 band; 166 __be32 mask; 167 u16 pad; 168 } __packed; 169 170 struct ath9k_htc_target_int_stats { 171 __be32 rx; 172 __be32 rxorn; 173 __be32 rxeol; 174 __be32 txurn; 175 __be32 txto; 176 __be32 cst; 177 } __packed; 178 179 struct ath9k_htc_target_tx_stats { 180 __be32 xretries; 181 __be32 fifoerr; 182 __be32 filtered; 183 __be32 timer_exp; 184 __be32 shortretries; 185 __be32 longretries; 186 __be32 qnull; 187 __be32 encap_fail; 188 __be32 nobuf; 189 } __packed; 190 191 struct ath9k_htc_target_rx_stats { 192 __be32 nobuf; 193 __be32 host_send; 194 __be32 host_done; 195 } __packed; 196 197 #define ATH9K_HTC_MAX_VIF 2 198 #define ATH9K_HTC_MAX_BCN_VIF 2 199 200 #define INC_VIF(_priv, _type) do { \ 201 switch (_type) { \ 202 case NL80211_IFTYPE_STATION: \ 203 _priv->num_sta_vif++; \ 204 break; \ 205 case NL80211_IFTYPE_ADHOC: \ 206 _priv->num_ibss_vif++; \ 207 break; \ 208 case NL80211_IFTYPE_AP: \ 209 _priv->num_ap_vif++; \ 210 break; \ 211 case NL80211_IFTYPE_MESH_POINT: \ 212 _priv->num_mbss_vif++; \ 213 break; \ 214 default: \ 215 break; \ 216 } \ 217 } while (0) 218 219 #define DEC_VIF(_priv, _type) do { \ 220 switch (_type) { \ 221 case NL80211_IFTYPE_STATION: \ 222 _priv->num_sta_vif--; \ 223 break; \ 224 case NL80211_IFTYPE_ADHOC: \ 225 _priv->num_ibss_vif--; \ 226 break; \ 227 case NL80211_IFTYPE_AP: \ 228 _priv->num_ap_vif--; \ 229 break; \ 230 case NL80211_IFTYPE_MESH_POINT: \ 231 _priv->num_mbss_vif--; \ 232 break; \ 233 default: \ 234 break; \ 235 } \ 236 } while (0) 237 238 struct ath9k_htc_vif { 239 u8 index; 240 u16 seq_no; 241 bool beacon_configured; 242 int bslot; 243 __le64 tsfadjust; 244 }; 245 246 struct ath9k_vif_iter_data { 247 const u8 *hw_macaddr; 248 u8 mask[ETH_ALEN]; 249 }; 250 251 #define ATH9K_HTC_MAX_STA 8 252 #define ATH9K_HTC_MAX_TID 8 253 254 enum tid_aggr_state { 255 AGGR_STOP = 0, 256 AGGR_PROGRESS, 257 AGGR_START, 258 AGGR_OPERATIONAL 259 }; 260 261 struct ath9k_htc_sta { 262 u8 index; 263 enum tid_aggr_state tid_state[ATH9K_HTC_MAX_TID]; 264 struct work_struct rc_update_work; 265 struct ath9k_htc_priv *htc_priv; 266 }; 267 268 #define ATH9K_HTC_RXBUF 256 269 #define HTC_RX_FRAME_HEADER_SIZE 40 270 271 struct ath9k_htc_rxbuf { 272 bool in_process; 273 struct sk_buff *skb; 274 struct ath_htc_rx_status rxstatus; 275 struct list_head list; 276 }; 277 278 struct ath9k_htc_rx { 279 struct list_head rxbuf; 280 spinlock_t rxbuflock; 281 }; 282 283 #define ATH9K_HTC_TX_CLEANUP_INTERVAL 50 /* ms */ 284 #define ATH9K_HTC_TX_TIMEOUT_INTERVAL 3000 /* ms */ 285 #define ATH9K_HTC_TX_RESERVE 10 286 #define ATH9K_HTC_TX_TIMEOUT_COUNT 40 287 #define ATH9K_HTC_TX_THRESHOLD (MAX_TX_BUF_NUM - ATH9K_HTC_TX_RESERVE) 288 289 #define ATH9K_HTC_OP_TX_QUEUES_STOP BIT(0) 290 #define ATH9K_HTC_OP_TX_DRAIN BIT(1) 291 292 struct ath9k_htc_tx { 293 u8 flags; 294 int queued_cnt; 295 struct sk_buff_head mgmt_ep_queue; 296 struct sk_buff_head cab_ep_queue; 297 struct sk_buff_head data_be_queue; 298 struct sk_buff_head data_bk_queue; 299 struct sk_buff_head data_vi_queue; 300 struct sk_buff_head data_vo_queue; 301 struct sk_buff_head tx_failed; 302 DECLARE_BITMAP(tx_slot, MAX_TX_BUF_NUM); 303 struct timer_list cleanup_timer; 304 spinlock_t tx_lock; 305 }; 306 307 struct ath9k_htc_tx_ctl { 308 u8 type; /* ATH9K_HTC_* */ 309 u8 epid; 310 u8 txok; 311 u8 sta_idx; 312 unsigned long timestamp; 313 }; 314 315 static inline struct ath9k_htc_tx_ctl *HTC_SKB_CB(struct sk_buff *skb) 316 { 317 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); 318 319 BUILD_BUG_ON(sizeof(struct ath9k_htc_tx_ctl) > 320 IEEE80211_TX_INFO_DRIVER_DATA_SIZE); 321 return (struct ath9k_htc_tx_ctl *) &tx_info->driver_data; 322 } 323 324 #ifdef CONFIG_ATH9K_HTC_DEBUGFS 325 326 #define TX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.tx_stats.c++) 327 #define TX_STAT_ADD(c, a) (hif_dev->htc_handle->drv_priv->debug.tx_stats.c += a) 328 #define RX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.skbrx_stats.c++) 329 #define RX_STAT_ADD(c, a) (hif_dev->htc_handle->drv_priv->debug.skbrx_stats.c += a) 330 #define CAB_STAT_INC priv->debug.tx_stats.cab_queued++ 331 332 #define TX_QSTAT_INC(q) (priv->debug.tx_stats.queue_stats[q]++) 333 334 void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv, 335 struct ath_rx_status *rs); 336 337 struct ath_tx_stats { 338 u32 buf_queued; 339 u32 buf_completed; 340 u32 skb_queued; 341 u32 skb_success; 342 u32 skb_success_bytes; 343 u32 skb_failed; 344 u32 cab_queued; 345 u32 queue_stats[IEEE80211_NUM_ACS]; 346 }; 347 348 struct ath_skbrx_stats { 349 u32 skb_allocated; 350 u32 skb_completed; 351 u32 skb_completed_bytes; 352 u32 skb_dropped; 353 }; 354 355 struct ath9k_debug { 356 struct dentry *debugfs_phy; 357 struct ath_tx_stats tx_stats; 358 struct ath_rx_stats rx_stats; 359 struct ath_skbrx_stats skbrx_stats; 360 }; 361 362 void ath9k_htc_get_et_strings(struct ieee80211_hw *hw, 363 struct ieee80211_vif *vif, 364 u32 sset, u8 *data); 365 int ath9k_htc_get_et_sset_count(struct ieee80211_hw *hw, 366 struct ieee80211_vif *vif, int sset); 367 void ath9k_htc_get_et_stats(struct ieee80211_hw *hw, 368 struct ieee80211_vif *vif, 369 struct ethtool_stats *stats, u64 *data); 370 #else 371 372 #define TX_STAT_INC(c) do { } while (0) 373 #define TX_STAT_ADD(c, a) do { } while (0) 374 #define RX_STAT_INC(c) do { } while (0) 375 #define RX_STAT_ADD(c, a) do { } while (0) 376 #define CAB_STAT_INC do { } while (0) 377 378 #define TX_QSTAT_INC(c) do { } while (0) 379 380 static inline void ath9k_htc_err_stat_rx(struct ath9k_htc_priv *priv, 381 struct ath_rx_status *rs) 382 { 383 } 384 385 #endif /* CONFIG_ATH9K_HTC_DEBUGFS */ 386 387 #define ATH_LED_PIN_DEF 1 388 #define ATH_LED_PIN_9287 10 389 #define ATH_LED_PIN_9271 15 390 #define ATH_LED_PIN_7010 12 391 392 #define BSTUCK_THRESHOLD 10 393 394 /* 395 * Adjust these when the max. no of beaconing interfaces is 396 * increased. 397 */ 398 #define DEFAULT_SWBA_RESPONSE 40 /* in TUs */ 399 #define MIN_SWBA_RESPONSE 10 /* in TUs */ 400 401 struct htc_beacon { 402 enum { 403 OK, /* no change needed */ 404 UPDATE, /* update pending */ 405 COMMIT /* beacon sent, commit change */ 406 } updateslot; /* slot time update fsm */ 407 408 struct ieee80211_vif *bslot[ATH9K_HTC_MAX_BCN_VIF]; 409 u32 bmisscnt; 410 u32 beaconq; 411 int slottime; 412 int slotupdate; 413 }; 414 415 struct ath_btcoex { 416 u32 bt_priority_cnt; 417 unsigned long bt_priority_time; 418 int bt_stomp_type; /* Types of BT stomping */ 419 u32 btcoex_no_stomp; 420 u32 btcoex_period; 421 u32 btscan_no_stomp; 422 }; 423 424 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 425 void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product); 426 void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv); 427 void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv); 428 #else 429 static inline void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product) 430 { 431 } 432 static inline void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv) 433 { 434 } 435 static inline void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv) 436 { 437 } 438 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */ 439 440 #define OP_BT_PRIORITY_DETECTED BIT(3) 441 #define OP_BT_SCAN BIT(4) 442 #define OP_TSF_RESET BIT(6) 443 444 struct ath9k_htc_priv { 445 struct device *dev; 446 struct ieee80211_hw *hw; 447 struct ath_hw *ah; 448 struct htc_target *htc; 449 struct wmi *wmi; 450 451 u16 fw_version_major; 452 u16 fw_version_minor; 453 454 enum htc_endpoint_id wmi_cmd_ep; 455 enum htc_endpoint_id beacon_ep; 456 enum htc_endpoint_id cab_ep; 457 enum htc_endpoint_id uapsd_ep; 458 enum htc_endpoint_id mgmt_ep; 459 enum htc_endpoint_id data_be_ep; 460 enum htc_endpoint_id data_bk_ep; 461 enum htc_endpoint_id data_vi_ep; 462 enum htc_endpoint_id data_vo_ep; 463 464 u8 vif_slot; 465 u8 mon_vif_idx; 466 u8 sta_slot; 467 u8 vif_sta_pos[ATH9K_HTC_MAX_VIF]; 468 u8 num_ibss_vif; 469 u8 num_mbss_vif; 470 u8 num_sta_vif; 471 u8 num_sta_assoc_vif; 472 u8 num_ap_vif; 473 474 u16 curtxpow; 475 u16 txpowlimit; 476 u16 nvifs; 477 u16 nstations; 478 bool rearm_ani; 479 bool reconfig_beacon; 480 unsigned int rxfilter; 481 unsigned long op_flags; 482 483 struct ath9k_hw_cal_data caldata; 484 struct ath_spec_scan_priv spec_priv; 485 486 spinlock_t beacon_lock; 487 struct ath_beacon_config cur_beacon_conf; 488 struct htc_beacon beacon; 489 490 struct ath9k_htc_rx rx; 491 struct ath9k_htc_tx tx; 492 493 struct tasklet_struct swba_tasklet; 494 struct tasklet_struct rx_tasklet; 495 struct delayed_work ani_work; 496 struct tasklet_struct tx_failed_tasklet; 497 struct work_struct ps_work; 498 struct work_struct fatal_work; 499 500 struct mutex htc_pm_lock; 501 unsigned long ps_usecount; 502 bool ps_enabled; 503 bool ps_idle; 504 505 #ifdef CONFIG_MAC80211_LEDS 506 enum led_brightness brightness; 507 bool led_registered; 508 char led_name[32]; 509 struct led_classdev led_cdev; 510 struct work_struct led_work; 511 #endif 512 513 int cabq; 514 int hwq_map[IEEE80211_NUM_ACS]; 515 516 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT 517 struct ath_btcoex btcoex; 518 #endif 519 520 struct delayed_work coex_period_work; 521 struct delayed_work duty_cycle_work; 522 #ifdef CONFIG_ATH9K_HTC_DEBUGFS 523 struct ath9k_debug debug; 524 #endif 525 struct mutex mutex; 526 }; 527 528 static inline void ath_read_cachesize(struct ath_common *common, int *csz) 529 { 530 common->bus_ops->read_cachesize(common, csz); 531 } 532 533 void ath9k_htc_reset(struct ath9k_htc_priv *priv); 534 535 void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv, 536 struct ieee80211_vif *vif); 537 void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv, 538 struct ieee80211_vif *vif); 539 void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv, 540 struct ieee80211_vif *vif); 541 void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv); 542 void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv, 543 struct ieee80211_vif *vif); 544 void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv); 545 void ath9k_htc_swba(struct ath9k_htc_priv *priv, 546 struct wmi_event_swba *swba); 547 548 void ath9k_htc_rxep(void *priv, struct sk_buff *skb, 549 enum htc_endpoint_id ep_id); 550 void ath9k_htc_txep(void *priv, struct sk_buff *skb, enum htc_endpoint_id ep_id, 551 bool txok); 552 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb, 553 enum htc_endpoint_id ep_id, bool txok); 554 555 int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv, 556 u8 enable_coex); 557 void ath9k_htc_ani_work(struct work_struct *work); 558 void ath9k_htc_start_ani(struct ath9k_htc_priv *priv); 559 void ath9k_htc_stop_ani(struct ath9k_htc_priv *priv); 560 561 int ath9k_tx_init(struct ath9k_htc_priv *priv); 562 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, 563 struct ieee80211_sta *sta, 564 struct sk_buff *skb, u8 slot, bool is_cab); 565 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv); 566 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype); 567 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv); 568 int get_hw_qnum(u16 queue, int *hwq_map); 569 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum, 570 struct ath9k_tx_queue_info *qinfo); 571 void ath9k_htc_check_stop_queues(struct ath9k_htc_priv *priv); 572 void ath9k_htc_check_wake_queues(struct ath9k_htc_priv *priv); 573 int ath9k_htc_tx_get_slot(struct ath9k_htc_priv *priv); 574 void ath9k_htc_tx_clear_slot(struct ath9k_htc_priv *priv, int slot); 575 void ath9k_htc_tx_drain(struct ath9k_htc_priv *priv); 576 void ath9k_htc_txstatus(struct ath9k_htc_priv *priv, void *wmi_event); 577 void ath9k_tx_failed_tasklet(unsigned long data); 578 void ath9k_htc_tx_cleanup_timer(unsigned long data); 579 580 int ath9k_rx_init(struct ath9k_htc_priv *priv); 581 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv); 582 void ath9k_host_rx_init(struct ath9k_htc_priv *priv); 583 void ath9k_rx_tasklet(unsigned long data); 584 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv); 585 586 void ath9k_htc_ps_wakeup(struct ath9k_htc_priv *priv); 587 void ath9k_htc_ps_restore(struct ath9k_htc_priv *priv); 588 void ath9k_ps_work(struct work_struct *work); 589 bool ath9k_htc_setpower(struct ath9k_htc_priv *priv, 590 enum ath9k_power_mode mode); 591 592 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv); 593 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw); 594 595 struct base_eep_header *ath9k_htc_get_eeprom_base(struct ath9k_htc_priv *priv); 596 597 #ifdef CONFIG_MAC80211_LEDS 598 void ath9k_configure_leds(struct ath9k_htc_priv *priv); 599 void ath9k_init_leds(struct ath9k_htc_priv *priv); 600 void ath9k_deinit_leds(struct ath9k_htc_priv *priv); 601 void ath9k_led_work(struct work_struct *work); 602 #else 603 static inline void ath9k_configure_leds(struct ath9k_htc_priv *priv) 604 { 605 } 606 607 static inline void ath9k_init_leds(struct ath9k_htc_priv *priv) 608 { 609 } 610 611 static inline void ath9k_deinit_leds(struct ath9k_htc_priv *priv) 612 { 613 } 614 615 static inline void ath9k_led_work(struct work_struct *work) 616 { 617 } 618 #endif 619 620 int ath9k_htc_probe_device(struct htc_target *htc_handle, struct device *dev, 621 u16 devid, char *product, u32 drv_info); 622 void ath9k_htc_disconnect_device(struct htc_target *htc_handle, bool hotunplug); 623 #ifdef CONFIG_PM 624 void ath9k_htc_suspend(struct htc_target *htc_handle); 625 int ath9k_htc_resume(struct htc_target *htc_handle); 626 #endif 627 #ifdef CONFIG_ATH9K_HTC_DEBUGFS 628 int ath9k_htc_init_debug(struct ath_hw *ah); 629 #else 630 static inline int ath9k_htc_init_debug(struct ath_hw *ah) { return 0; }; 631 #endif /* CONFIG_ATH9K_HTC_DEBUGFS */ 632 633 #endif /* HTC_H */ 634