1 /*
2  * Copyright (c) 2008-2009 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 ATH_H
18 #define ATH_H
19 
20 #include <linux/etherdevice.h>
21 #include <linux/skbuff.h>
22 #include <linux/if_ether.h>
23 #include <linux/spinlock.h>
24 #include <net/mac80211.h>
25 
26 /*
27  * The key cache is used for h/w cipher state and also for
28  * tracking station state such as the current tx antenna.
29  * We also setup a mapping table between key cache slot indices
30  * and station state to short-circuit node lookups on rx.
31  * Different parts have different size key caches.  We handle
32  * up to ATH_KEYMAX entries (could dynamically allocate state).
33  */
34 #define	ATH_KEYMAX	        128     /* max key cache size we handle */
35 
36 struct ath_ani {
37 	bool caldone;
38 	unsigned int longcal_timer;
39 	unsigned int shortcal_timer;
40 	unsigned int resetcal_timer;
41 	unsigned int checkani_timer;
42 	struct timer_list timer;
43 };
44 
45 struct ath_cycle_counters {
46 	u32 cycles;
47 	u32 rx_busy;
48 	u32 rx_frame;
49 	u32 tx_frame;
50 };
51 
52 enum ath_device_state {
53 	ATH_HW_UNAVAILABLE,
54 	ATH_HW_INITIALIZED,
55 };
56 
57 enum ath_op_flags {
58 	ATH_OP_INVALID,
59 	ATH_OP_BEACONS,
60 	ATH_OP_ANI_RUN,
61 	ATH_OP_PRIM_STA_VIF,
62 	ATH_OP_HW_RESET,
63 	ATH_OP_SCANNING,
64 	ATH_OP_MULTI_CHANNEL,
65 	ATH_OP_WOW_ENABLED,
66 };
67 
68 enum ath_bus_type {
69 	ATH_PCI,
70 	ATH_AHB,
71 	ATH_USB,
72 };
73 
74 struct reg_dmn_pair_mapping {
75 	u16 reg_domain;
76 	u16 reg_5ghz_ctl;
77 	u16 reg_2ghz_ctl;
78 };
79 
80 struct ath_regulatory {
81 	char alpha2[2];
82 	enum nl80211_dfs_regions region;
83 	u16 country_code;
84 	u16 max_power_level;
85 	u16 current_rd;
86 	int16_t power_limit;
87 	struct reg_dmn_pair_mapping *regpair;
88 };
89 
90 enum ath_crypt_caps {
91 	ATH_CRYPT_CAP_CIPHER_AESCCM		= BIT(0),
92 	ATH_CRYPT_CAP_MIC_COMBINED		= BIT(1),
93 };
94 
95 struct ath_keyval {
96 	u8 kv_type;
97 	u8 kv_pad;
98 	u16 kv_len;
99 	struct_group(kv_values,
100 		u8 kv_val[16]; /* TK */
101 		u8 kv_mic[8]; /* Michael MIC key */
102 		u8 kv_txmic[8]; /* Michael MIC TX key (used only if the hardware
103 				 * supports both MIC keys in the same key cache entry;
104 				 * in that case, kv_mic is the RX key) */
105 	);
106 };
107 
108 enum ath_cipher {
109 	ATH_CIPHER_WEP = 0,
110 	ATH_CIPHER_AES_OCB = 1,
111 	ATH_CIPHER_AES_CCM = 2,
112 	ATH_CIPHER_CKIP = 3,
113 	ATH_CIPHER_TKIP = 4,
114 	ATH_CIPHER_CLR = 5,
115 	ATH_CIPHER_MIC = 127
116 };
117 
118 /**
119  * struct ath_ops - Register read/write operations
120  *
121  * @read: Register read
122  * @multi_read: Multiple register read
123  * @write: Register write
124  * @enable_write_buffer: Enable multiple register writes
125  * @write_flush: flush buffered register writes and disable buffering
126  */
127 struct ath_ops {
128 	unsigned int (*read)(void *, u32 reg_offset);
129 	void (*multi_read)(void *, u32 *addr, u32 *val, u16 count);
130 	void (*write)(void *, u32 val, u32 reg_offset);
131 	void (*enable_write_buffer)(void *);
132 	void (*write_flush) (void *);
133 	u32 (*rmw)(void *, u32 reg_offset, u32 set, u32 clr);
134 	void (*enable_rmw_buffer)(void *);
135 	void (*rmw_flush) (void *);
136 
137 };
138 
139 struct ath_common;
140 struct ath_bus_ops;
141 
142 struct ath_ps_ops {
143 	void (*wakeup)(struct ath_common *common);
144 	void (*restore)(struct ath_common *common);
145 };
146 
147 struct ath_common {
148 	void *ah;
149 	void *priv;
150 	struct ieee80211_hw *hw;
151 	int debug_mask;
152 	enum ath_device_state state;
153 	unsigned long op_flags;
154 
155 	struct ath_ani ani;
156 
157 	u16 cachelsz;
158 	u16 curaid;
159 	u8 macaddr[ETH_ALEN];
160 	u8 curbssid[ETH_ALEN] __aligned(2);
161 	u8 bssidmask[ETH_ALEN];
162 
163 	u32 rx_bufsize;
164 
165 	u32 keymax;
166 	DECLARE_BITMAP(keymap, ATH_KEYMAX);
167 	DECLARE_BITMAP(tkip_keymap, ATH_KEYMAX);
168 	DECLARE_BITMAP(ccmp_keymap, ATH_KEYMAX);
169 	enum ath_crypt_caps crypt_caps;
170 
171 	unsigned int clockrate;
172 
173 	spinlock_t cc_lock;
174 	struct ath_cycle_counters cc_ani;
175 	struct ath_cycle_counters cc_survey;
176 
177 	struct ath_regulatory regulatory;
178 	struct ath_regulatory reg_world_copy;
179 	const struct ath_ops *ops;
180 	const struct ath_bus_ops *bus_ops;
181 	const struct ath_ps_ops *ps_ops;
182 
183 	bool btcoex_enabled;
184 	bool disable_ani;
185 	bool bt_ant_diversity;
186 
187 	int last_rssi;
188 	struct ieee80211_supported_band sbands[NUM_NL80211_BANDS];
189 };
190 
ath_ps_ops(struct ath_common * common)191 static inline const struct ath_ps_ops *ath_ps_ops(struct ath_common *common)
192 {
193 	return common->ps_ops;
194 }
195 
196 struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,
197 				u32 len,
198 				gfp_t gfp_mask);
199 bool ath_is_mybeacon(struct ath_common *common, struct ieee80211_hdr *hdr);
200 
201 void ath_hw_setbssidmask(struct ath_common *common);
202 void ath_key_delete(struct ath_common *common, u8 hw_key_idx);
203 int ath_key_config(struct ath_common *common,
204 			  struct ieee80211_vif *vif,
205 			  struct ieee80211_sta *sta,
206 			  struct ieee80211_key_conf *key);
207 bool ath_hw_keyreset(struct ath_common *common, u16 entry);
208 bool ath_hw_keysetmac(struct ath_common *common, u16 entry, const u8 *mac);
209 void ath_hw_cycle_counters_update(struct ath_common *common);
210 int32_t ath_hw_get_listen_time(struct ath_common *common);
211 
212 __printf(3, 4)
213 void ath_printk(const char *level, const struct ath_common *common,
214 		const char *fmt, ...);
215 
216 #define ath_emerg(common, fmt, ...)				\
217 	ath_printk(KERN_EMERG, common, fmt, ##__VA_ARGS__)
218 #define ath_alert(common, fmt, ...)				\
219 	ath_printk(KERN_ALERT, common, fmt, ##__VA_ARGS__)
220 #define ath_crit(common, fmt, ...)				\
221 	ath_printk(KERN_CRIT, common, fmt, ##__VA_ARGS__)
222 #define ath_err(common, fmt, ...)				\
223 	ath_printk(KERN_ERR, common, fmt, ##__VA_ARGS__)
224 #define ath_warn(common, fmt, ...)				\
225 	ath_printk(KERN_WARNING, common, fmt, ##__VA_ARGS__)
226 #define ath_notice(common, fmt, ...)				\
227 	ath_printk(KERN_NOTICE, common, fmt, ##__VA_ARGS__)
228 #define ath_info(common, fmt, ...)				\
229 	ath_printk(KERN_INFO, common, fmt, ##__VA_ARGS__)
230 
231 /**
232  * enum ath_debug_level - atheros wireless debug level
233  *
234  * @ATH_DBG_RESET: reset processing
235  * @ATH_DBG_QUEUE: hardware queue management
236  * @ATH_DBG_EEPROM: eeprom processing
237  * @ATH_DBG_CALIBRATE: periodic calibration
238  * @ATH_DBG_INTERRUPT: interrupt processing
239  * @ATH_DBG_REGULATORY: regulatory processing
240  * @ATH_DBG_ANI: adaptive noise immunitive processing
241  * @ATH_DBG_XMIT: basic xmit operation
242  * @ATH_DBG_BEACON: beacon handling
243  * @ATH_DBG_CONFIG: configuration of the hardware
244  * @ATH_DBG_FATAL: fatal errors, this is the default, DBG_DEFAULT
245  * @ATH_DBG_PS: power save processing
246  * @ATH_DBG_HWTIMER: hardware timer handling
247  * @ATH_DBG_BTCOEX: bluetooth coexistance
248  * @ATH_DBG_BSTUCK: stuck beacons
249  * @ATH_DBG_MCI: Message Coexistence Interface, a private protocol
250  *	used exclusively for WLAN-BT coexistence starting from
251  *	AR9462.
252  * @ATH_DBG_DFS: radar datection
253  * @ATH_DBG_WOW: Wake on Wireless
254  * @ATH_DBG_DYNACK: dynack handling
255  * @ATH_DBG_SPECTRAL_SCAN: FFT spectral scan
256  * @ATH_DBG_ANY: enable all debugging
257  *
258  * The debug level is used to control the amount and type of debugging output
259  * we want to see. Each driver has its own method for enabling debugging and
260  * modifying debug level states -- but this is typically done through a
261  * module parameter 'debug' along with a respective 'debug' debugfs file
262  * entry.
263  */
264 enum ATH_DEBUG {
265 	ATH_DBG_RESET		= 0x00000001,
266 	ATH_DBG_QUEUE		= 0x00000002,
267 	ATH_DBG_EEPROM		= 0x00000004,
268 	ATH_DBG_CALIBRATE	= 0x00000008,
269 	ATH_DBG_INTERRUPT	= 0x00000010,
270 	ATH_DBG_REGULATORY	= 0x00000020,
271 	ATH_DBG_ANI		= 0x00000040,
272 	ATH_DBG_XMIT		= 0x00000080,
273 	ATH_DBG_BEACON		= 0x00000100,
274 	ATH_DBG_CONFIG		= 0x00000200,
275 	ATH_DBG_FATAL		= 0x00000400,
276 	ATH_DBG_PS		= 0x00000800,
277 	ATH_DBG_BTCOEX		= 0x00001000,
278 	ATH_DBG_WMI		= 0x00002000,
279 	ATH_DBG_BSTUCK		= 0x00004000,
280 	ATH_DBG_MCI		= 0x00008000,
281 	ATH_DBG_DFS		= 0x00010000,
282 	ATH_DBG_WOW		= 0x00020000,
283 	ATH_DBG_CHAN_CTX	= 0x00040000,
284 	ATH_DBG_DYNACK		= 0x00080000,
285 	ATH_DBG_SPECTRAL_SCAN	= 0x00100000,
286 	ATH_DBG_ANY		= 0xffffffff
287 };
288 
289 #define ATH_DBG_DEFAULT (ATH_DBG_FATAL)
290 #define ATH_DBG_MAX_LEN 512
291 
292 #ifdef CONFIG_ATH_DEBUG
293 
294 #define ath_dbg(common, dbg_mask, fmt, ...)				\
295 do {									\
296 	if ((common)->debug_mask & ATH_DBG_##dbg_mask)			\
297 		ath_printk(KERN_DEBUG, common, fmt, ##__VA_ARGS__);	\
298 } while (0)
299 
300 #define ATH_DBG_WARN(foo, arg...) WARN(foo, arg)
301 #define ATH_DBG_WARN_ON_ONCE(foo) WARN_ON_ONCE(foo)
302 
303 #else
304 
305 static inline  __attribute__ ((format (printf, 3, 4)))
_ath_dbg(struct ath_common * common,enum ATH_DEBUG dbg_mask,const char * fmt,...)306 void _ath_dbg(struct ath_common *common, enum ATH_DEBUG dbg_mask,
307 	     const char *fmt, ...)
308 {
309 }
310 #define ath_dbg(common, dbg_mask, fmt, ...)				\
311 	_ath_dbg(common, ATH_DBG_##dbg_mask, fmt, ##__VA_ARGS__)
312 
313 #define ATH_DBG_WARN(foo, arg...) do {} while (0)
314 #define ATH_DBG_WARN_ON_ONCE(foo) ({				\
315 	int __ret_warn_once = !!(foo);				\
316 	unlikely(__ret_warn_once);				\
317 })
318 
319 #endif /* CONFIG_ATH_DEBUG */
320 
321 /** Returns string describing opmode, or NULL if unknown mode. */
322 #ifdef CONFIG_ATH_DEBUG
323 const char *ath_opmode_to_string(enum nl80211_iftype opmode);
324 #else
ath_opmode_to_string(enum nl80211_iftype opmode)325 static inline const char *ath_opmode_to_string(enum nl80211_iftype opmode)
326 {
327 	return "UNKNOWN";
328 }
329 #endif
330 
331 extern const char *ath_bus_type_strings[];
ath_bus_type_to_string(enum ath_bus_type bustype)332 static inline const char *ath_bus_type_to_string(enum ath_bus_type bustype)
333 {
334 	return ath_bus_type_strings[bustype];
335 }
336 
337 #endif /* ATH_H */
338