linux/drivers/net/wireless/broadcom/brcm80211/brcmsmac/stf.c

/*
 * 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.
 */

#include <net/mac80211.h>

#include "types.h"
#include "d11.h"
#include "rate.h"
#include "phy/phy_hal.h"
#include "channel.h"
#include "main.h"
#include "stf.h"
#include "debug.h"

#define MIN_SPATIAL_EXPANSION …
#define MAX_SPATIAL_EXPANSION …

#define BRCMS_STF_SS_STBC_RX(wlc) …

#define NSTS_1 …
#define NSTS_2 …
#define NSTS_3 …
#define NSTS_4 …

static const u8 txcore_default[5] = …;

static void brcms_c_stf_stbc_rx_ht_update(struct brcms_c_info *wlc, int val)
{ … }

/*
 * every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to
 * turn on/off txchain.
 */
void brcms_c_tempsense_upd(struct brcms_c_info *wlc)
{ … }

void
brcms_c_stf_ss_algo_channel_get(struct brcms_c_info *wlc, u16 *ss_algo_channel,
			    u16 chanspec)
{ … }

static bool brcms_c_stf_stbc_tx_set(struct brcms_c_info *wlc, s32 int_val)
{ … }

bool brcms_c_stf_stbc_rx_set(struct brcms_c_info *wlc, s32 int_val)
{ … }

static int brcms_c_stf_txcore_set(struct brcms_c_info *wlc, u8 Nsts,
				  u8 core_mask)
{ … }

static int brcms_c_stf_spatial_policy_set(struct brcms_c_info *wlc, int val)
{ … }

/*
 * Centralized txant update function. call it whenever wlc->stf->txant and/or
 * wlc->stf->txchain change.
 *
 * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
 * achieve various tx/rx antenna selection schemes
 *
 * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7
 * means auto(last rx).
 * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7
 * means last rx and do tx-antenna selection for SISO transmissions
 * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7
 * means last rx and do tx-antenna selection for SISO transmissions
 * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7
 * means both cores active
*/
static void _brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc)
{ … }

int brcms_c_stf_txchain_set(struct brcms_c_info *wlc, s32 int_val, bool force)
{ … }

/*
 * update wlc->stf->ss_opmode which represents the operational stf_ss mode
 * we're using
 */
void brcms_c_stf_ss_update(struct brcms_c_info *wlc, struct brcms_band *band)
{ … }

int brcms_c_stf_attach(struct brcms_c_info *wlc)
{ … }

void brcms_c_stf_detach(struct brcms_c_info *wlc)
{ … }

void brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc)
{ … }

void brcms_c_stf_phy_chain_calc(struct brcms_c_info *wlc)
{ … }

static u16 _brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc,
				       u32 rspec)
{ … }

u16 brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, u32 rspec)
{ … }

u16 brcms_c_stf_d11hdrs_phyctl_txant(struct brcms_c_info *wlc, u32 rspec)
{ … }