2 * Copyright (c) 2010 Broadcom Corporation
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.
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 ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 extern const u8 rate_info[];
24 extern const struct brcms_c_rateset cck_ofdm_mimo_rates;
25 extern const struct brcms_c_rateset ofdm_mimo_rates;
26 extern const struct brcms_c_rateset cck_ofdm_rates;
27 extern const struct brcms_c_rateset ofdm_rates;
28 extern const struct brcms_c_rateset cck_rates;
29 extern const struct brcms_c_rateset gphy_legacy_rates;
30 extern const struct brcms_c_rateset rate_limit_1_2;
32 struct brcms_mcs_info {
33 /* phy rate in kbps [20Mhz] */
35 /* phy rate in kbps [40Mhz] */
37 /* phy rate in kbps [20Mhz] with SGI */
39 /* phy rate in kbps [40Mhz] with SGI */
41 /* phy ctl byte 3, code rate, modulation type, # of streams */
43 /* matching legacy ofdm rate in 500bkps */
47 #define BRCMS_MAXMCS 32 /* max valid mcs index */
48 #define MCS_TABLE_SIZE 33 /* Number of mcs entries in the table */
49 extern const struct brcms_mcs_info mcs_table[];
51 #define MCS_TXS_MASK 0xc0 /* num tx streams - 1 bit mask */
52 #define MCS_TXS_SHIFT 6 /* num tx streams - 1 bit shift */
54 /* returns num tx streams - 1 */
55 static inline u8 mcs_2_txstreams(u8 mcs)
57 return (mcs_table[mcs].tx_phy_ctl3 & MCS_TXS_MASK) >> MCS_TXS_SHIFT;
60 static inline uint mcs_2_rate(u8 mcs, bool is40, bool sgi)
64 return mcs_table[mcs].phy_rate_40_sgi;
65 return mcs_table[mcs].phy_rate_20_sgi;
68 return mcs_table[mcs].phy_rate_40;
70 return mcs_table[mcs].phy_rate_20;
73 /* Macro to use the rate_info table */
74 #define BRCMS_RATE_MASK_FULL 0xff /* Rate value mask with basic rate flag */
77 * rate spec : holds rate and mode specific information required to generate a
78 * tx frame. Legacy CCK and OFDM information is held in the same manner as was
79 * done in the past (in the lower byte) the upper 3 bytes primarily hold MIMO
80 * specific information
83 /* rate spec bit fields */
85 /* Either 500Kbps units or MIMO MCS idx */
86 #define RSPEC_RATE_MASK 0x0000007F
87 /* mimo MCS is stored in RSPEC_RATE_MASK */
88 #define RSPEC_MIMORATE 0x08000000
90 #define RSPEC_BW_MASK 0x00000700
92 #define RSPEC_BW_SHIFT 8
93 /* mimo Space/Time/Frequency mode mask */
94 #define RSPEC_STF_MASK 0x00003800
95 /* mimo Space/Time/Frequency mode shift */
96 #define RSPEC_STF_SHIFT 11
97 /* mimo coding type mask */
98 #define RSPEC_CT_MASK 0x0000C000
99 /* mimo coding type shift */
100 #define RSPEC_CT_SHIFT 14
101 /* mimo num STC streams per PLCP defn. */
102 #define RSPEC_STC_MASK 0x00300000
103 /* mimo num STC streams per PLCP defn. */
104 #define RSPEC_STC_SHIFT 20
105 /* mimo bit indicates adv coding in use */
106 #define RSPEC_LDPC_CODING 0x00400000
107 /* mimo bit indicates short GI in use */
108 #define RSPEC_SHORT_GI 0x00800000
109 /* bit indicates override both rate & mode */
110 #define RSPEC_OVERRIDE 0x80000000
111 /* bit indicates override rate only */
112 #define RSPEC_OVERRIDE_MCS_ONLY 0x40000000
114 static inline bool rspec_active(u32 rspec)
116 return rspec & (RSPEC_RATE_MASK | RSPEC_MIMORATE);
119 static inline u8 rspec_phytxbyte2(u32 rspec)
121 return (rspec & 0xff00) >> 8;
124 static inline u32 rspec_get_bw(u32 rspec)
126 return (rspec & RSPEC_BW_MASK) >> RSPEC_BW_SHIFT;
129 static inline bool rspec_issgi(u32 rspec)
131 return (rspec & RSPEC_SHORT_GI) == RSPEC_SHORT_GI;
134 static inline bool rspec_is40mhz(u32 rspec)
136 u32 bw = rspec_get_bw(rspec);
138 return bw == PHY_TXC1_BW_40MHZ || bw == PHY_TXC1_BW_40MHZ_DUP;
141 static inline uint rspec2rate(u32 rspec)
143 if (rspec & RSPEC_MIMORATE)
144 return mcs_2_rate(rspec & RSPEC_RATE_MASK, rspec_is40mhz(rspec),
146 return rspec & RSPEC_RATE_MASK;
149 static inline u8 rspec_mimoplcp3(u32 rspec)
151 return (rspec & 0xf00000) >> 16;
154 static inline bool plcp3_issgi(u8 plcp)
156 return (plcp & (RSPEC_SHORT_GI >> 16)) != 0;
159 static inline uint rspec_stc(u32 rspec)
161 return (rspec & RSPEC_STC_MASK) >> RSPEC_STC_SHIFT;
164 static inline uint rspec_stf(u32 rspec)
166 return (rspec & RSPEC_STF_MASK) >> RSPEC_STF_SHIFT;
169 static inline bool is_mcs_rate(u32 ratespec)
171 return (ratespec & RSPEC_MIMORATE) != 0;
174 static inline bool is_ofdm_rate(u32 ratespec)
176 return !is_mcs_rate(ratespec) &&
177 (rate_info[ratespec & RSPEC_RATE_MASK] & BRCMS_RATE_FLAG);
180 static inline bool is_cck_rate(u32 ratespec)
182 u32 rate = (ratespec & BRCMS_RATE_MASK);
184 return !is_mcs_rate(ratespec) && (
185 rate == BRCM_RATE_1M || rate == BRCM_RATE_2M ||
186 rate == BRCM_RATE_5M5 || rate == BRCM_RATE_11M);
189 static inline bool is_single_stream(u8 mcs)
191 return mcs <= HIGHEST_SINGLE_STREAM_MCS || mcs == 32;
194 static inline u8 cck_rspec(u8 cck)
196 return cck & RSPEC_RATE_MASK;
199 /* Convert encoded rate value in plcp header to numerical rates in 500 KHz
201 extern const u8 ofdm_rate_lookup[];
203 static inline u8 ofdm_phy2mac_rate(u8 rlpt)
205 return ofdm_rate_lookup[rlpt & 0x7];
208 static inline u8 cck_phy2mac_rate(u8 signal)
213 /* Rates specified in brcms_c_rateset_filter() */
214 #define BRCMS_RATES_CCK_OFDM 0
215 #define BRCMS_RATES_CCK 1
216 #define BRCMS_RATES_OFDM 2
218 /* sanitize, and sort a rateset with the basic bit(s) preserved, validate
221 brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset *rs,
222 const struct brcms_c_rateset *hw_rs,
223 bool check_brate, u8 txstreams);
224 /* copy rateset src to dst as-is (no masking or sorting) */
225 extern void brcms_c_rateset_copy(const struct brcms_c_rateset *src,
226 struct brcms_c_rateset *dst);
228 /* would be nice to have these documented ... */
229 extern u32 brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp);
231 extern void brcms_c_rateset_filter(struct brcms_c_rateset *src,
232 struct brcms_c_rateset *dst, bool basic_only, u8 rates, uint xmask,
236 brcms_c_rateset_default(struct brcms_c_rateset *rs_tgt,
237 const struct brcms_c_rateset *rs_hw, uint phy_type,
238 int bandtype, bool cck_only, uint rate_mask,
239 bool mcsallow, u8 bw, u8 txstreams);
241 extern s16 brcms_c_rate_legacy_phyctl(uint rate);
243 extern void brcms_c_rateset_mcs_upd(struct brcms_c_rateset *rs, u8 txstreams);
244 extern void brcms_c_rateset_mcs_clear(struct brcms_c_rateset *rateset);
245 extern void brcms_c_rateset_mcs_build(struct brcms_c_rateset *rateset,
247 extern void brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset *rateset,
250 #endif /* _BRCM_RATE_H_ */