diff options
Diffstat (limited to 'drivers/staging/brcm80211/brcmsmac/wlc_stf.c')
-rw-r--r-- | drivers/staging/brcm80211/brcmsmac/wlc_stf.c | 533 |
1 files changed, 533 insertions, 0 deletions
diff --git a/drivers/staging/brcm80211/brcmsmac/wlc_stf.c b/drivers/staging/brcm80211/brcmsmac/wlc_stf.c new file mode 100644 index 000000000000..098fd59ee153 --- /dev/null +++ b/drivers/staging/brcm80211/brcmsmac/wlc_stf.c @@ -0,0 +1,533 @@ +/* + * 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 <linux/kernel.h> +#include <linux/module.h> + +#include <proto/802.11.h> + +#include <bcmdefs.h> +#include <bcmutils.h> +#include <siutils.h> +#include <wlioctl.h> +#include <bcmwifi.h> +#include <sbhnddma.h> + +#include "wlc_types.h" +#include "d11.h" +#include "wl_dbg.h" +#include "wlc_cfg.h" +#include "wlc_rate.h" +#include "wlc_scb.h" +#include "wlc_pub.h" +#include "wlc_key.h" +#include "phy/wlc_phy_hal.h" +#include "wlc_channel.h" +#include "wlc_main.h" +#include "wl_export.h" +#include "wlc_bmac.h" +#include "wlc_stf.h" + +#define MIN_SPATIAL_EXPANSION 0 +#define MAX_SPATIAL_EXPANSION 1 + +#define WLC_STF_SS_STBC_RX(wlc) (WLCISNPHY(wlc->band) && \ + NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6)) + +static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val); +static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 val); +static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val); +static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val); + +static void _wlc_stf_phy_txant_upd(struct wlc_info *wlc); +static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec); + +#define NSTS_1 1 +#define NSTS_2 2 +#define NSTS_3 3 +#define NSTS_4 4 +const u8 txcore_default[5] = { + (0), /* bitmap of the core enabled */ + (0x01), /* For Nsts = 1, enable core 1 */ + (0x03), /* For Nsts = 2, enable core 1 & 2 */ + (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */ + (0x0f) /* For Nsts = 4, enable all cores */ +}; + +static void wlc_stf_stbc_rx_ht_update(struct wlc_info *wlc, int val) +{ + ASSERT((val == HT_CAP_RX_STBC_NO) + || (val == HT_CAP_RX_STBC_ONE_STREAM)); + + /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */ + if (WLC_STF_SS_STBC_RX(wlc)) { + if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO)) + return; + } + + wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_RX_STBC; + wlc->ht_cap.cap_info |= (val << IEEE80211_HT_CAP_RX_STBC_SHIFT); + + if (wlc->pub->up) { + wlc_update_beacon(wlc); + wlc_update_probe_resp(wlc, true); + } +} + +/* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to turn on/off txchain */ +void wlc_tempsense_upd(struct wlc_info *wlc) +{ + wlc_phy_t *pi = wlc->band->pi; + uint active_chains, txchain; + + /* Check if the chip is too hot. Disable one Tx chain, if it is */ + /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */ + active_chains = wlc_phy_stf_chain_active_get(pi); + txchain = active_chains & 0xf; + + if (wlc->stf->txchain == wlc->stf->hw_txchain) { + if (txchain && (txchain < wlc->stf->hw_txchain)) { + /* turn off 1 tx chain */ + wlc_stf_txchain_set(wlc, txchain, true); + } + } else if (wlc->stf->txchain < wlc->stf->hw_txchain) { + if (txchain == wlc->stf->hw_txchain) { + /* turn back on txchain */ + wlc_stf_txchain_set(wlc, txchain, true); + } + } +} + +void +wlc_stf_ss_algo_channel_get(struct wlc_info *wlc, u16 *ss_algo_channel, + chanspec_t chanspec) +{ + tx_power_t power; + u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id; + + /* Clear previous settings */ + *ss_algo_channel = 0; + + if (!wlc->pub->up) { + *ss_algo_channel = (u16) -1; + return; + } + + wlc_phy_txpower_get_current(wlc->band->pi, &power, + CHSPEC_CHANNEL(chanspec)); + + siso_mcs_id = (CHSPEC_IS40(chanspec)) ? + WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST; + cdd_mcs_id = (CHSPEC_IS40(chanspec)) ? + WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST; + stbc_mcs_id = (CHSPEC_IS40(chanspec)) ? + WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST; + + /* criteria to choose stf mode */ + + /* the "+3dbm (12 0.25db units)" is to account for the fact that with CDD, tx occurs + * on both chains + */ + if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12)) + setbit(ss_algo_channel, PHY_TXC1_MODE_SISO); + else + setbit(ss_algo_channel, PHY_TXC1_MODE_CDD); + + /* STBC is ORed into to algo channel as STBC requires per-packet SCB capability check + * so cannot be default mode of operation. One of SISO, CDD have to be set + */ + if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12)) + setbit(ss_algo_channel, PHY_TXC1_MODE_STBC); +} + +static bool wlc_stf_stbc_tx_set(struct wlc_info *wlc, s32 int_val) +{ + if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) { + return false; + } + + if ((int_val == ON) && (wlc->stf->txstreams == 1)) + return false; + + if ((int_val == OFF) || (wlc->stf->txstreams == 1) + || !WLC_STBC_CAP_PHY(wlc)) + wlc->ht_cap.cap_info &= ~IEEE80211_HT_CAP_TX_STBC; + else + wlc->ht_cap.cap_info |= IEEE80211_HT_CAP_TX_STBC; + + wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val; + wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val; + + return true; +} + +bool wlc_stf_stbc_rx_set(struct wlc_info *wlc, s32 int_val) +{ + if ((int_val != HT_CAP_RX_STBC_NO) + && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) { + return false; + } + + if (WLC_STF_SS_STBC_RX(wlc)) { + if ((int_val != HT_CAP_RX_STBC_NO) + && (wlc->stf->rxstreams == 1)) + return false; + } + + wlc_stf_stbc_rx_ht_update(wlc, int_val); + return true; +} + +static int wlc_stf_txcore_set(struct wlc_info *wlc, u8 Nsts, u8 core_mask) +{ + WL_TRACE("wl%d: %s: Nsts %d core_mask %x\n", + wlc->pub->unit, __func__, Nsts, core_mask); + + ASSERT((Nsts > 0) && (Nsts <= MAX_STREAMS_SUPPORTED)); + + if (WLC_BITSCNT(core_mask) > wlc->stf->txstreams) { + core_mask = 0; + } + + if ((WLC_BITSCNT(core_mask) == wlc->stf->txstreams) && + ((core_mask & ~wlc->stf->txchain) + || !(core_mask & wlc->stf->txchain))) { + core_mask = wlc->stf->txchain; + } + + ASSERT(!core_mask || Nsts <= WLC_BITSCNT(core_mask)); + + wlc->stf->txcore[Nsts] = core_mask; + /* Nsts = 1..4, txcore index = 1..4 */ + if (Nsts == 1) { + /* Needs to update beacon and ucode generated response + * frames when 1 stream core map changed + */ + wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT; + wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant); + if (wlc->clk) { + wlc_suspend_mac_and_wait(wlc); + wlc_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec); + wlc_enable_mac(wlc); + } + } + + return BCME_OK; +} + +static int wlc_stf_spatial_policy_set(struct wlc_info *wlc, int val) +{ + int i; + u8 core_mask = 0; + + WL_TRACE("wl%d: %s: val %x\n", wlc->pub->unit, __func__, val); + + wlc->stf->spatial_policy = (s8) val; + for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) { + core_mask = (val == MAX_SPATIAL_EXPANSION) ? + wlc->stf->txchain : txcore_default[i]; + wlc_stf_txcore_set(wlc, (u8) i, core_mask); + } + return BCME_OK; +} + +int wlc_stf_txchain_set(struct wlc_info *wlc, s32 int_val, bool force) +{ + u8 txchain = (u8) int_val; + u8 txstreams; + uint i; + + if (wlc->stf->txchain == txchain) + return BCME_OK; + + if ((txchain & ~wlc->stf->hw_txchain) + || !(txchain & wlc->stf->hw_txchain)) + return BCME_RANGE; + + /* if nrate override is configured to be non-SISO STF mode, reject reducing txchain to 1 */ + txstreams = (u8) WLC_BITSCNT(txchain); + if (txstreams > MAX_STREAMS_SUPPORTED) + return BCME_RANGE; + + if (txstreams == 1) { + for (i = 0; i < NBANDS(wlc); i++) + if ((RSPEC_STF(wlc->bandstate[i]->rspec_override) != + PHY_TXC1_MODE_SISO) + || (RSPEC_STF(wlc->bandstate[i]->mrspec_override) != + PHY_TXC1_MODE_SISO)) { + if (!force) + return BCME_ERROR; + + /* over-write the override rspec */ + if (RSPEC_STF(wlc->bandstate[i]->rspec_override) + != PHY_TXC1_MODE_SISO) { + wlc->bandstate[i]->rspec_override = 0; + WL_ERROR("%s(): temp sense override non-SISO rspec_override\n", + __func__); + } + if (RSPEC_STF + (wlc->bandstate[i]->mrspec_override) != + PHY_TXC1_MODE_SISO) { + wlc->bandstate[i]->mrspec_override = 0; + WL_ERROR("%s(): temp sense override non-SISO mrspec_override\n", + __func__); + } + } + } + + wlc->stf->txchain = txchain; + wlc->stf->txstreams = txstreams; + wlc_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx); + wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); + wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); + wlc->stf->txant = + (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF; + _wlc_stf_phy_txant_upd(wlc); + + wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain, + wlc->stf->rxchain); + + for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) + wlc_stf_txcore_set(wlc, (u8) i, txcore_default[i]); + + return BCME_OK; +} + +/* update wlc->stf->ss_opmode which represents the operational stf_ss mode we're using */ +int wlc_stf_ss_update(struct wlc_info *wlc, struct wlcband *band) +{ + int ret_code = 0; + u8 prev_stf_ss; + u8 upd_stf_ss; + + prev_stf_ss = wlc->stf->ss_opmode; + + /* NOTE: opmode can only be SISO or CDD as STBC is decided on a per-packet basis */ + if (WLC_STBC_CAP_PHY(wlc) && + wlc->stf->ss_algosel_auto + && (wlc->stf->ss_algo_channel != (u16) -1)) { + ASSERT(isset(&wlc->stf->ss_algo_channel, PHY_TXC1_MODE_CDD) + || isset(&wlc->stf->ss_algo_channel, + PHY_TXC1_MODE_SISO)); + upd_stf_ss = (wlc->stf->no_cddstbc || (wlc->stf->txstreams == 1) + || isset(&wlc->stf->ss_algo_channel, + PHY_TXC1_MODE_SISO)) ? PHY_TXC1_MODE_SISO + : PHY_TXC1_MODE_CDD; + } else { + if (wlc->band != band) + return ret_code; + upd_stf_ss = (wlc->stf->no_cddstbc + || (wlc->stf->txstreams == + 1)) ? PHY_TXC1_MODE_SISO : band-> + band_stf_ss_mode; + } + if (prev_stf_ss != upd_stf_ss) { + wlc->stf->ss_opmode = upd_stf_ss; + wlc_bmac_band_stf_ss_set(wlc->hw, upd_stf_ss); + } + + return ret_code; +} + +int wlc_stf_attach(struct wlc_info *wlc) +{ + wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO; + wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD; + + if (WLCISNPHY(wlc->band) && + (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON)) + wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = + PHY_TXC1_MODE_CDD; + wlc_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); + wlc_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); + + wlc_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO); + wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF; + wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF; + + if (WLC_STBC_CAP_PHY(wlc)) { + wlc->stf->ss_algosel_auto = true; + wlc->stf->ss_algo_channel = (u16) -1; /* Init the default value */ + } + return 0; +} + +void wlc_stf_detach(struct wlc_info *wlc) +{ +} + +int wlc_stf_ant_txant_validate(struct wlc_info *wlc, s8 val) +{ + int bcmerror = BCME_OK; + + /* when there is only 1 tx_streams, don't allow to change the txant */ + if (WLCISNPHY(wlc->band) && (wlc->stf->txstreams == 1)) + return ((val == wlc->stf->txant) ? bcmerror : BCME_RANGE); + + switch (val) { + case -1: + val = ANT_TX_DEF; + break; + case 0: + val = ANT_TX_FORCE_0; + break; + case 1: + val = ANT_TX_FORCE_1; + break; + case 3: + val = ANT_TX_LAST_RX; + break; + default: + bcmerror = BCME_RANGE; + break; + } + + if (bcmerror == BCME_OK) + wlc->stf->txant = (s8) val; + + return bcmerror; + +} + +/* + * 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 _wlc_stf_phy_txant_upd(struct wlc_info *wlc) +{ + s8 txant; + + txant = (s8) wlc->stf->txant; + ASSERT(txant == ANT_TX_FORCE_0 || txant == ANT_TX_FORCE_1 + || txant == ANT_TX_LAST_RX); + + if (WLC_PHY_11N_CAP(wlc->band)) { + if (txant == ANT_TX_FORCE_0) { + wlc->stf->phytxant = PHY_TXC_ANT_0; + } else if (txant == ANT_TX_FORCE_1) { + wlc->stf->phytxant = PHY_TXC_ANT_1; + + if (WLCISNPHY(wlc->band) && + NREV_GE(wlc->band->phyrev, 3) + && NREV_LT(wlc->band->phyrev, 7)) { + wlc->stf->phytxant = PHY_TXC_ANT_2; + } + } else { + if (WLCISLCNPHY(wlc->band) || WLCISSSLPNPHY(wlc->band)) + wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST; + else { + /* keep this assert to catch out of sync wlc->stf->txcore */ + ASSERT(wlc->stf->txchain > 0); + wlc->stf->phytxant = + wlc->stf->txchain << PHY_TXC_ANT_SHIFT; + } + } + } else { + if (txant == ANT_TX_FORCE_0) + wlc->stf->phytxant = PHY_TXC_OLD_ANT_0; + else if (txant == ANT_TX_FORCE_1) + wlc->stf->phytxant = PHY_TXC_OLD_ANT_1; + else + wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST; + } + + wlc_bmac_txant_set(wlc->hw, wlc->stf->phytxant); +} + +void wlc_stf_phy_txant_upd(struct wlc_info *wlc) +{ + _wlc_stf_phy_txant_upd(wlc); +} + +void wlc_stf_phy_chain_calc(struct wlc_info *wlc) +{ + /* get available rx/tx chains */ + wlc->stf->hw_txchain = (u8) getintvar(wlc->pub->vars, "txchain"); + wlc->stf->hw_rxchain = (u8) getintvar(wlc->pub->vars, "rxchain"); + + /* these parameter are intended to be used for all PHY types */ + if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) { + if (WLCISNPHY(wlc->band)) { + wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY; + } else { + wlc->stf->hw_txchain = TXCHAIN_DEF; + } + } + + wlc->stf->txchain = wlc->stf->hw_txchain; + wlc->stf->txstreams = (u8) WLC_BITSCNT(wlc->stf->hw_txchain); + + if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) { + if (WLCISNPHY(wlc->band)) { + wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY; + } else { + wlc->stf->hw_rxchain = RXCHAIN_DEF; + } + } + + wlc->stf->rxchain = wlc->stf->hw_rxchain; + wlc->stf->rxstreams = (u8) WLC_BITSCNT(wlc->stf->hw_rxchain); + + /* initialize the txcore table */ + memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore)); + + /* default spatial_policy */ + wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION; + wlc_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION); +} + +static u16 _wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec) +{ + u16 phytxant = wlc->stf->phytxant; + + if (RSPEC_STF(rspec) != PHY_TXC1_MODE_SISO) { + ASSERT(wlc->stf->txstreams > 1); + phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; + } else if (wlc->stf->txant == ANT_TX_DEF) + phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; + phytxant &= PHY_TXC_ANT_MASK; + return phytxant; +} + +u16 wlc_stf_phytxchain_sel(struct wlc_info *wlc, ratespec_t rspec) +{ + return _wlc_stf_phytxchain_sel(wlc, rspec); +} + +u16 wlc_stf_d11hdrs_phyctl_txant(struct wlc_info *wlc, ratespec_t rspec) +{ + u16 phytxant = wlc->stf->phytxant; + u16 mask = PHY_TXC_ANT_MASK; + + /* for non-siso rates or default setting, use the available chains */ + if (WLCISNPHY(wlc->band)) { + ASSERT(wlc->stf->txchain != 0); + phytxant = _wlc_stf_phytxchain_sel(wlc, rspec); + mask = PHY_TXC_HTANT_MASK; + } + phytxant |= phytxant & mask; + return phytxant; +} |