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245 lines
7.0 KiB
245 lines
7.0 KiB
/* |
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* Copyright (c) 2010 Broadcom Corporation |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#ifndef _BRCM_RATE_H_ |
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#define _BRCM_RATE_H_ |
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#include "types.h" |
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#include "d11.h" |
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#include "phy_hal.h" |
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extern const u8 rate_info[]; |
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extern const struct brcms_c_rateset cck_ofdm_mimo_rates; |
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extern const struct brcms_c_rateset ofdm_mimo_rates; |
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extern const struct brcms_c_rateset cck_ofdm_rates; |
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extern const struct brcms_c_rateset ofdm_rates; |
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extern const struct brcms_c_rateset cck_rates; |
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extern const struct brcms_c_rateset gphy_legacy_rates; |
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extern const struct brcms_c_rateset rate_limit_1_2; |
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struct brcms_mcs_info { |
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/* phy rate in kbps [20Mhz] */ |
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u32 phy_rate_20; |
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/* phy rate in kbps [40Mhz] */ |
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u32 phy_rate_40; |
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/* phy rate in kbps [20Mhz] with SGI */ |
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u32 phy_rate_20_sgi; |
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/* phy rate in kbps [40Mhz] with SGI */ |
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u32 phy_rate_40_sgi; |
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/* phy ctl byte 3, code rate, modulation type, # of streams */ |
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u8 tx_phy_ctl3; |
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/* matching legacy ofdm rate in 500bkps */ |
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u8 leg_ofdm; |
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}; |
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#define BRCMS_MAXMCS 32 /* max valid mcs index */ |
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#define MCS_TABLE_SIZE 33 /* Number of mcs entries in the table */ |
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extern const struct brcms_mcs_info mcs_table[]; |
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#define MCS_TXS_MASK 0xc0 /* num tx streams - 1 bit mask */ |
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#define MCS_TXS_SHIFT 6 /* num tx streams - 1 bit shift */ |
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/* returns num tx streams - 1 */ |
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static inline u8 mcs_2_txstreams(u8 mcs) |
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{ |
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return (mcs_table[mcs].tx_phy_ctl3 & MCS_TXS_MASK) >> MCS_TXS_SHIFT; |
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} |
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static inline uint mcs_2_rate(u8 mcs, bool is40, bool sgi) |
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{ |
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if (sgi) { |
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if (is40) |
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return mcs_table[mcs].phy_rate_40_sgi; |
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return mcs_table[mcs].phy_rate_20_sgi; |
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} |
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if (is40) |
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return mcs_table[mcs].phy_rate_40; |
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return mcs_table[mcs].phy_rate_20; |
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} |
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/* Macro to use the rate_info table */ |
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#define BRCMS_RATE_MASK_FULL 0xff /* Rate value mask with basic rate flag */ |
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/* |
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* rate spec : holds rate and mode specific information required to generate a |
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* tx frame. Legacy CCK and OFDM information is held in the same manner as was |
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* done in the past (in the lower byte) the upper 3 bytes primarily hold MIMO |
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* specific information |
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*/ |
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/* rate spec bit fields */ |
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/* Either 500Kbps units or MIMO MCS idx */ |
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#define RSPEC_RATE_MASK 0x0000007F |
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/* mimo MCS is stored in RSPEC_RATE_MASK */ |
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#define RSPEC_MIMORATE 0x08000000 |
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/* mimo bw mask */ |
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#define RSPEC_BW_MASK 0x00000700 |
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/* mimo bw shift */ |
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#define RSPEC_BW_SHIFT 8 |
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/* mimo Space/Time/Frequency mode mask */ |
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#define RSPEC_STF_MASK 0x00003800 |
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/* mimo Space/Time/Frequency mode shift */ |
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#define RSPEC_STF_SHIFT 11 |
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/* mimo coding type mask */ |
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#define RSPEC_CT_MASK 0x0000C000 |
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/* mimo coding type shift */ |
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#define RSPEC_CT_SHIFT 14 |
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/* mimo num STC streams per PLCP defn. */ |
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#define RSPEC_STC_MASK 0x00300000 |
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/* mimo num STC streams per PLCP defn. */ |
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#define RSPEC_STC_SHIFT 20 |
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/* mimo bit indicates adv coding in use */ |
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#define RSPEC_LDPC_CODING 0x00400000 |
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/* mimo bit indicates short GI in use */ |
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#define RSPEC_SHORT_GI 0x00800000 |
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/* bit indicates override both rate & mode */ |
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#define RSPEC_OVERRIDE 0x80000000 |
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/* bit indicates override rate only */ |
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#define RSPEC_OVERRIDE_MCS_ONLY 0x40000000 |
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static inline bool rspec_active(u32 rspec) |
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{ |
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return rspec & (RSPEC_RATE_MASK | RSPEC_MIMORATE); |
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} |
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static inline u8 rspec_phytxbyte2(u32 rspec) |
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{ |
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return (rspec & 0xff00) >> 8; |
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} |
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static inline u32 rspec_get_bw(u32 rspec) |
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{ |
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return (rspec & RSPEC_BW_MASK) >> RSPEC_BW_SHIFT; |
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} |
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static inline bool rspec_issgi(u32 rspec) |
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{ |
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return (rspec & RSPEC_SHORT_GI) == RSPEC_SHORT_GI; |
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} |
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static inline bool rspec_is40mhz(u32 rspec) |
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{ |
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u32 bw = rspec_get_bw(rspec); |
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return bw == PHY_TXC1_BW_40MHZ || bw == PHY_TXC1_BW_40MHZ_DUP; |
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} |
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static inline uint rspec2rate(u32 rspec) |
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{ |
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if (rspec & RSPEC_MIMORATE) |
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return mcs_2_rate(rspec & RSPEC_RATE_MASK, rspec_is40mhz(rspec), |
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rspec_issgi(rspec)); |
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return rspec & RSPEC_RATE_MASK; |
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} |
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static inline u8 rspec_mimoplcp3(u32 rspec) |
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{ |
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return (rspec & 0xf00000) >> 16; |
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} |
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static inline bool plcp3_issgi(u8 plcp) |
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{ |
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return (plcp & (RSPEC_SHORT_GI >> 16)) != 0; |
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} |
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static inline uint rspec_stc(u32 rspec) |
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{ |
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return (rspec & RSPEC_STC_MASK) >> RSPEC_STC_SHIFT; |
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} |
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static inline uint rspec_stf(u32 rspec) |
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{ |
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return (rspec & RSPEC_STF_MASK) >> RSPEC_STF_SHIFT; |
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} |
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static inline bool is_mcs_rate(u32 ratespec) |
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{ |
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return (ratespec & RSPEC_MIMORATE) != 0; |
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} |
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static inline bool is_ofdm_rate(u32 ratespec) |
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{ |
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return !is_mcs_rate(ratespec) && |
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(rate_info[ratespec & RSPEC_RATE_MASK] & BRCMS_RATE_FLAG); |
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} |
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static inline bool is_cck_rate(u32 ratespec) |
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{ |
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u32 rate = (ratespec & BRCMS_RATE_MASK); |
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return !is_mcs_rate(ratespec) && ( |
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rate == BRCM_RATE_1M || rate == BRCM_RATE_2M || |
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rate == BRCM_RATE_5M5 || rate == BRCM_RATE_11M); |
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} |
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static inline bool is_single_stream(u8 mcs) |
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{ |
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return mcs <= HIGHEST_SINGLE_STREAM_MCS || mcs == 32; |
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} |
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static inline u8 cck_rspec(u8 cck) |
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{ |
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return cck & RSPEC_RATE_MASK; |
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} |
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/* Convert encoded rate value in plcp header to numerical rates in 500 KHz |
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* increments */ |
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static inline u8 ofdm_phy2mac_rate(u8 rlpt) |
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{ |
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return wlc_phy_get_ofdm_rate_lookup()[rlpt & 0x7]; |
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} |
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static inline u8 cck_phy2mac_rate(u8 signal) |
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{ |
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return signal/5; |
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} |
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/* Rates specified in brcms_c_rateset_filter() */ |
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#define BRCMS_RATES_CCK_OFDM 0 |
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#define BRCMS_RATES_CCK 1 |
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#define BRCMS_RATES_OFDM 2 |
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/* sanitize, and sort a rateset with the basic bit(s) preserved, validate |
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* rateset */ |
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bool brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset *rs, |
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const struct brcms_c_rateset *hw_rs, |
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bool check_brate, u8 txstreams); |
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/* copy rateset src to dst as-is (no masking or sorting) */ |
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void brcms_c_rateset_copy(const struct brcms_c_rateset *src, |
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struct brcms_c_rateset *dst); |
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/* would be nice to have these documented ... */ |
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u32 brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp); |
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void brcms_c_rateset_filter(struct brcms_c_rateset *src, |
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struct brcms_c_rateset *dst, bool basic_only, |
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u8 rates, uint xmask, bool mcsallow); |
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void brcms_c_rateset_default(struct brcms_c_rateset *rs_tgt, |
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const struct brcms_c_rateset *rs_hw, uint phy_type, |
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int bandtype, bool cck_only, uint rate_mask, |
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bool mcsallow, u8 bw, u8 txstreams); |
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s16 brcms_c_rate_legacy_phyctl(uint rate); |
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void brcms_c_rateset_mcs_upd(struct brcms_c_rateset *rs, u8 txstreams); |
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void brcms_c_rateset_mcs_clear(struct brcms_c_rateset *rateset); |
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void brcms_c_rateset_mcs_build(struct brcms_c_rateset *rateset, u8 txstreams); |
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void brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset *rateset, u8 bw); |
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#endif /* _BRCM_RATE_H_ */
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