246 lines
7 KiB
C
246 lines
7 KiB
C
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/*
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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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