diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/rate.h')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/rate.h | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/rate.h b/drivers/net/wireless/brcm80211/brcmsmac/rate.h new file mode 100644 index 00000000000..e7b9dc2f273 --- /dev/null +++ b/drivers/net/wireless/brcm80211/brcmsmac/rate.h @@ -0,0 +1,250 @@ +/* + * Copyright (c) 2010 Broadcom Corporation + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _BRCM_RATE_H_ +#define _BRCM_RATE_H_ + +#include "types.h" +#include "d11.h" + +extern const u8 rate_info[]; +extern const struct brcms_c_rateset cck_ofdm_mimo_rates; +extern const struct brcms_c_rateset ofdm_mimo_rates; +extern const struct brcms_c_rateset cck_ofdm_rates; +extern const struct brcms_c_rateset ofdm_rates; +extern const struct brcms_c_rateset cck_rates; +extern const struct brcms_c_rateset gphy_legacy_rates; +extern const struct brcms_c_rateset rate_limit_1_2; + +struct brcms_mcs_info { + /* phy rate in kbps [20Mhz] */ + u32 phy_rate_20; + /* phy rate in kbps [40Mhz] */ + u32 phy_rate_40; + /* phy rate in kbps [20Mhz] with SGI */ + u32 phy_rate_20_sgi; + /* phy rate in kbps [40Mhz] with SGI */ + u32 phy_rate_40_sgi; + /* phy ctl byte 3, code rate, modulation type, # of streams */ + u8 tx_phy_ctl3; + /* matching legacy ofdm rate in 500bkps */ + u8 leg_ofdm; +}; + +#define BRCMS_MAXMCS 32 /* max valid mcs index */ +#define MCS_TABLE_SIZE 33 /* Number of mcs entries in the table */ +extern const struct brcms_mcs_info mcs_table[]; + +#define MCS_TXS_MASK 0xc0 /* num tx streams - 1 bit mask */ +#define MCS_TXS_SHIFT 6 /* num tx streams - 1 bit shift */ + +/* returns num tx streams - 1 */ +static inline u8 mcs_2_txstreams(u8 mcs) +{ + return (mcs_table[mcs].tx_phy_ctl3 & MCS_TXS_MASK) >> MCS_TXS_SHIFT; +} + +static inline uint mcs_2_rate(u8 mcs, bool is40, bool sgi) +{ + if (sgi) { + if (is40) + return mcs_table[mcs].phy_rate_40_sgi; + return mcs_table[mcs].phy_rate_20_sgi; + } + if (is40) + return mcs_table[mcs].phy_rate_40; + + return mcs_table[mcs].phy_rate_20; +} + +/* Macro to use the rate_info table */ +#define BRCMS_RATE_MASK_FULL 0xff /* Rate value mask with basic rate flag */ + +/* + * rate spec : holds rate and mode specific information required to generate a + * tx frame. Legacy CCK and OFDM information is held in the same manner as was + * done in the past (in the lower byte) the upper 3 bytes primarily hold MIMO + * specific information + */ + +/* rate spec bit fields */ + +/* Either 500Kbps units or MIMO MCS idx */ +#define RSPEC_RATE_MASK 0x0000007F +/* mimo MCS is stored in RSPEC_RATE_MASK */ +#define RSPEC_MIMORATE 0x08000000 +/* mimo bw mask */ +#define RSPEC_BW_MASK 0x00000700 +/* mimo bw shift */ +#define RSPEC_BW_SHIFT 8 +/* mimo Space/Time/Frequency mode mask */ +#define RSPEC_STF_MASK 0x00003800 +/* mimo Space/Time/Frequency mode shift */ +#define RSPEC_STF_SHIFT 11 +/* mimo coding type mask */ +#define RSPEC_CT_MASK 0x0000C000 +/* mimo coding type shift */ +#define RSPEC_CT_SHIFT 14 +/* mimo num STC streams per PLCP defn. */ +#define RSPEC_STC_MASK 0x00300000 +/* mimo num STC streams per PLCP defn. */ +#define RSPEC_STC_SHIFT 20 +/* mimo bit indicates adv coding in use */ +#define RSPEC_LDPC_CODING 0x00400000 +/* mimo bit indicates short GI in use */ +#define RSPEC_SHORT_GI 0x00800000 +/* bit indicates override both rate & mode */ +#define RSPEC_OVERRIDE 0x80000000 +/* bit indicates override rate only */ +#define RSPEC_OVERRIDE_MCS_ONLY 0x40000000 + +static inline bool rspec_active(u32 rspec) +{ + return rspec & (RSPEC_RATE_MASK | RSPEC_MIMORATE); +} + +static inline u8 rspec_phytxbyte2(u32 rspec) +{ + return (rspec & 0xff00) >> 8; +} + +static inline u32 rspec_get_bw(u32 rspec) +{ + return (rspec & RSPEC_BW_MASK) >> RSPEC_BW_SHIFT; +} + +static inline bool rspec_issgi(u32 rspec) +{ + return (rspec & RSPEC_SHORT_GI) == RSPEC_SHORT_GI; +} + +static inline bool rspec_is40mhz(u32 rspec) +{ + u32 bw = rspec_get_bw(rspec); + + return bw == PHY_TXC1_BW_40MHZ || bw == PHY_TXC1_BW_40MHZ_DUP; +} + +static inline uint rspec2rate(u32 rspec) +{ + if (rspec & RSPEC_MIMORATE) + return mcs_2_rate(rspec & RSPEC_RATE_MASK, rspec_is40mhz(rspec), + rspec_issgi(rspec)); + return rspec & RSPEC_RATE_MASK; +} + +static inline u8 rspec_mimoplcp3(u32 rspec) +{ + return (rspec & 0xf00000) >> 16; +} + +static inline bool plcp3_issgi(u8 plcp) +{ + return (plcp & (RSPEC_SHORT_GI >> 16)) != 0; +} + +static inline uint rspec_stc(u32 rspec) +{ + return (rspec & RSPEC_STC_MASK) >> RSPEC_STC_SHIFT; +} + +static inline uint rspec_stf(u32 rspec) +{ + return (rspec & RSPEC_STF_MASK) >> RSPEC_STF_SHIFT; +} + +static inline bool is_mcs_rate(u32 ratespec) +{ + return (ratespec & RSPEC_MIMORATE) != 0; +} + +static inline bool is_ofdm_rate(u32 ratespec) +{ + return !is_mcs_rate(ratespec) && + (rate_info[ratespec & RSPEC_RATE_MASK] & BRCMS_RATE_FLAG); +} + +static inline bool is_cck_rate(u32 ratespec) +{ + u32 rate = (ratespec & BRCMS_RATE_MASK); + + return !is_mcs_rate(ratespec) && ( + rate == BRCM_RATE_1M || rate == BRCM_RATE_2M || + rate == BRCM_RATE_5M5 || rate == BRCM_RATE_11M); +} + +static inline bool is_single_stream(u8 mcs) +{ + return mcs <= HIGHEST_SINGLE_STREAM_MCS || mcs == 32; +} + +static inline u8 cck_rspec(u8 cck) +{ + return cck & RSPEC_RATE_MASK; +} + +/* Convert encoded rate value in plcp header to numerical rates in 500 KHz + * increments */ +extern const u8 ofdm_rate_lookup[]; + +static inline u8 ofdm_phy2mac_rate(u8 rlpt) +{ + return ofdm_rate_lookup[rlpt & 0x7]; +} + +static inline u8 cck_phy2mac_rate(u8 signal) +{ + return signal/5; +} + +/* Rates specified in brcms_c_rateset_filter() */ +#define BRCMS_RATES_CCK_OFDM 0 +#define BRCMS_RATES_CCK 1 +#define BRCMS_RATES_OFDM 2 + +/* sanitize, and sort a rateset with the basic bit(s) preserved, validate + * rateset */ +extern bool +brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset *rs, + const struct brcms_c_rateset *hw_rs, + bool check_brate, u8 txstreams); +/* copy rateset src to dst as-is (no masking or sorting) */ +extern void brcms_c_rateset_copy(const struct brcms_c_rateset *src, + struct brcms_c_rateset *dst); + +/* would be nice to have these documented ... */ +extern u32 brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp); + +extern void brcms_c_rateset_filter(struct brcms_c_rateset *src, + struct brcms_c_rateset *dst, bool basic_only, u8 rates, uint xmask, + bool mcsallow); + +extern void +brcms_c_rateset_default(struct brcms_c_rateset *rs_tgt, + const struct brcms_c_rateset *rs_hw, uint phy_type, + int bandtype, bool cck_only, uint rate_mask, + bool mcsallow, u8 bw, u8 txstreams); + +extern s16 brcms_c_rate_legacy_phyctl(uint rate); + +extern void brcms_c_rateset_mcs_upd(struct brcms_c_rateset *rs, u8 txstreams); +extern void brcms_c_rateset_mcs_clear(struct brcms_c_rateset *rateset); +extern void brcms_c_rateset_mcs_build(struct brcms_c_rateset *rateset, + u8 txstreams); +extern void brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset *rateset, + u8 bw); + +#endif /* _BRCM_RATE_H_ */ |