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/*
* 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_ */
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