441 lines
12 KiB
C
441 lines
12 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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#include <net/mac80211.h>
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#include "types.h"
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#include "d11.h"
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#include "rate.h"
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#include "phy/phy_hal.h"
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#include "channel.h"
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#include "main.h"
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#include "stf.h"
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#include "debug.h"
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#define MIN_SPATIAL_EXPANSION 0
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#define MAX_SPATIAL_EXPANSION 1
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#define BRCMS_STF_SS_STBC_RX(wlc) (BRCMS_ISNPHY(wlc->band) && \
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NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6))
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#define NSTS_1 1
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#define NSTS_2 2
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#define NSTS_3 3
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#define NSTS_4 4
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static const u8 txcore_default[5] = {
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(0), /* bitmap of the core enabled */
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(0x01), /* For Nsts = 1, enable core 1 */
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(0x03), /* For Nsts = 2, enable core 1 & 2 */
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(0x07), /* For Nsts = 3, enable core 1, 2 & 3 */
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(0x0f) /* For Nsts = 4, enable all cores */
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};
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static void brcms_c_stf_stbc_rx_ht_update(struct brcms_c_info *wlc, int val)
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{
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/* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */
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if (BRCMS_STF_SS_STBC_RX(wlc)) {
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if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO))
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return;
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}
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if (wlc->pub->up) {
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brcms_c_update_beacon(wlc);
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brcms_c_update_probe_resp(wlc, true);
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}
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}
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/*
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* every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to
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* turn on/off txchain.
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*/
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void brcms_c_tempsense_upd(struct brcms_c_info *wlc)
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{
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struct brcms_phy_pub *pi = wlc->band->pi;
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uint active_chains, txchain;
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/* Check if the chip is too hot. Disable one Tx chain, if it is */
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/* high 4 bits are for Rx chain, low 4 bits are for Tx chain */
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active_chains = wlc_phy_stf_chain_active_get(pi);
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txchain = active_chains & 0xf;
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if (wlc->stf->txchain == wlc->stf->hw_txchain) {
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if (txchain && (txchain < wlc->stf->hw_txchain))
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/* turn off 1 tx chain */
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brcms_c_stf_txchain_set(wlc, txchain, true);
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} else if (wlc->stf->txchain < wlc->stf->hw_txchain) {
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if (txchain == wlc->stf->hw_txchain)
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/* turn back on txchain */
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brcms_c_stf_txchain_set(wlc, txchain, true);
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}
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}
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void
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brcms_c_stf_ss_algo_channel_get(struct brcms_c_info *wlc, u16 *ss_algo_channel,
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u16 chanspec)
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{
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struct tx_power power = { };
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u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id;
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/* Clear previous settings */
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*ss_algo_channel = 0;
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if (!wlc->pub->up) {
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*ss_algo_channel = (u16) -1;
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return;
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}
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wlc_phy_txpower_get_current(wlc->band->pi, &power,
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CHSPEC_CHANNEL(chanspec));
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siso_mcs_id = (CHSPEC_IS40(chanspec)) ?
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WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST;
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cdd_mcs_id = (CHSPEC_IS40(chanspec)) ?
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WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST;
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stbc_mcs_id = (CHSPEC_IS40(chanspec)) ?
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WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST;
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/* criteria to choose stf mode */
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/*
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* the "+3dbm (12 0.25db units)" is to account for the fact that with
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* CDD, tx occurs on both chains
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*/
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if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12))
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setbit(ss_algo_channel, PHY_TXC1_MODE_SISO);
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else
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setbit(ss_algo_channel, PHY_TXC1_MODE_CDD);
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/*
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* STBC is ORed into to algo channel as STBC requires per-packet SCB
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* capability check so cannot be default mode of operation. One of
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* SISO, CDD have to be set
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*/
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if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12))
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setbit(ss_algo_channel, PHY_TXC1_MODE_STBC);
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}
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static bool brcms_c_stf_stbc_tx_set(struct brcms_c_info *wlc, s32 int_val)
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{
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if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON))
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return false;
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if ((int_val == ON) && (wlc->stf->txstreams == 1))
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return false;
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wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val;
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wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val;
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return true;
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}
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bool brcms_c_stf_stbc_rx_set(struct brcms_c_info *wlc, s32 int_val)
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{
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if ((int_val != HT_CAP_RX_STBC_NO)
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&& (int_val != HT_CAP_RX_STBC_ONE_STREAM))
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return false;
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if (BRCMS_STF_SS_STBC_RX(wlc)) {
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if ((int_val != HT_CAP_RX_STBC_NO)
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&& (wlc->stf->rxstreams == 1))
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return false;
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}
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brcms_c_stf_stbc_rx_ht_update(wlc, int_val);
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return true;
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}
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static int brcms_c_stf_txcore_set(struct brcms_c_info *wlc, u8 Nsts,
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u8 core_mask)
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{
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brcms_dbg_ht(wlc->hw->d11core, "wl%d: Nsts %d core_mask %x\n",
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wlc->pub->unit, Nsts, core_mask);
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if (hweight8(core_mask) > wlc->stf->txstreams)
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core_mask = 0;
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if ((hweight8(core_mask) == wlc->stf->txstreams) &&
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((core_mask & ~wlc->stf->txchain)
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|| !(core_mask & wlc->stf->txchain)))
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core_mask = wlc->stf->txchain;
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wlc->stf->txcore[Nsts] = core_mask;
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/* Nsts = 1..4, txcore index = 1..4 */
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if (Nsts == 1) {
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/* Needs to update beacon and ucode generated response
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* frames when 1 stream core map changed
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*/
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wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT;
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brcms_b_txant_set(wlc->hw, wlc->stf->phytxant);
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if (wlc->clk) {
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brcms_c_suspend_mac_and_wait(wlc);
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brcms_c_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec);
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brcms_c_enable_mac(wlc);
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}
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}
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return 0;
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}
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static int brcms_c_stf_spatial_policy_set(struct brcms_c_info *wlc, int val)
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{
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int i;
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u8 core_mask = 0;
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brcms_dbg_ht(wlc->hw->d11core, "wl%d: val %x\n", wlc->pub->unit,
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val);
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wlc->stf->spatial_policy = (s8) val;
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for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) {
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core_mask = (val == MAX_SPATIAL_EXPANSION) ?
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wlc->stf->txchain : txcore_default[i];
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brcms_c_stf_txcore_set(wlc, (u8) i, core_mask);
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}
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return 0;
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}
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/*
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* Centralized txant update function. call it whenever wlc->stf->txant and/or
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* wlc->stf->txchain change.
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*
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* Antennas are controlled by ucode indirectly, which drives PHY or GPIO to
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* achieve various tx/rx antenna selection schemes
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*
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* legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7
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* means auto(last rx).
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* for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7
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* means last rx and do tx-antenna selection for SISO transmissions
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* for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7
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* means last rx and do tx-antenna selection for SISO transmissions
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* for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7
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* means both cores active
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*/
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static void _brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc)
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{
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s8 txant;
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txant = (s8) wlc->stf->txant;
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if (BRCMS_PHY_11N_CAP(wlc->band)) {
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if (txant == ANT_TX_FORCE_0) {
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wlc->stf->phytxant = PHY_TXC_ANT_0;
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} else if (txant == ANT_TX_FORCE_1) {
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wlc->stf->phytxant = PHY_TXC_ANT_1;
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if (BRCMS_ISNPHY(wlc->band) &&
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NREV_GE(wlc->band->phyrev, 3)
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&& NREV_LT(wlc->band->phyrev, 7))
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wlc->stf->phytxant = PHY_TXC_ANT_2;
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} else {
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if (BRCMS_ISLCNPHY(wlc->band) ||
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BRCMS_ISSSLPNPHY(wlc->band))
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wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST;
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else {
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/* catch out of sync wlc->stf->txcore */
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WARN_ON(wlc->stf->txchain <= 0);
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wlc->stf->phytxant =
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wlc->stf->txchain << PHY_TXC_ANT_SHIFT;
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}
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}
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} else {
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if (txant == ANT_TX_FORCE_0)
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wlc->stf->phytxant = PHY_TXC_OLD_ANT_0;
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else if (txant == ANT_TX_FORCE_1)
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wlc->stf->phytxant = PHY_TXC_OLD_ANT_1;
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else
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wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST;
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}
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brcms_b_txant_set(wlc->hw, wlc->stf->phytxant);
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}
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int brcms_c_stf_txchain_set(struct brcms_c_info *wlc, s32 int_val, bool force)
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{
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u8 txchain = (u8) int_val;
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u8 txstreams;
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uint i;
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if (wlc->stf->txchain == txchain)
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return 0;
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if ((txchain & ~wlc->stf->hw_txchain)
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|| !(txchain & wlc->stf->hw_txchain))
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return -EINVAL;
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/*
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* if nrate override is configured to be non-SISO STF mode, reject
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* reducing txchain to 1
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*/
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txstreams = (u8) hweight8(txchain);
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if (txstreams > MAX_STREAMS_SUPPORTED)
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return -EINVAL;
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wlc->stf->txchain = txchain;
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wlc->stf->txstreams = txstreams;
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brcms_c_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx);
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brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
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brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
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wlc->stf->txant =
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(wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF;
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_brcms_c_stf_phy_txant_upd(wlc);
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wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain,
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wlc->stf->rxchain);
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for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++)
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brcms_c_stf_txcore_set(wlc, (u8) i, txcore_default[i]);
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return 0;
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}
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/*
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* update wlc->stf->ss_opmode which represents the operational stf_ss mode
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* we're using
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*/
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int brcms_c_stf_ss_update(struct brcms_c_info *wlc, struct brcms_band *band)
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{
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int ret_code = 0;
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u8 prev_stf_ss;
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u8 upd_stf_ss;
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prev_stf_ss = wlc->stf->ss_opmode;
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/*
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* NOTE: opmode can only be SISO or CDD as STBC is decided on a
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* per-packet basis
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*/
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if (BRCMS_STBC_CAP_PHY(wlc) &&
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wlc->stf->ss_algosel_auto
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&& (wlc->stf->ss_algo_channel != (u16) -1)) {
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upd_stf_ss = (wlc->stf->txstreams == 1 ||
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isset(&wlc->stf->ss_algo_channel,
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PHY_TXC1_MODE_SISO)) ?
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PHY_TXC1_MODE_SISO : PHY_TXC1_MODE_CDD;
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} else {
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if (wlc->band != band)
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return ret_code;
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upd_stf_ss = (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;
|
||
|
|
brcms_b_band_stf_ss_set(wlc->hw, upd_stf_ss);
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret_code;
|
||
|
|
}
|
||
|
|
|
||
|
|
int brcms_c_stf_attach(struct brcms_c_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 (BRCMS_ISNPHY(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;
|
||
|
|
brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
|
||
|
|
brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
|
||
|
|
|
||
|
|
brcms_c_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 (BRCMS_STBC_CAP_PHY(wlc)) {
|
||
|
|
wlc->stf->ss_algosel_auto = true;
|
||
|
|
/* Init the default value */
|
||
|
|
wlc->stf->ss_algo_channel = (u16) -1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void brcms_c_stf_detach(struct brcms_c_info *wlc)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
void brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc)
|
||
|
|
{
|
||
|
|
_brcms_c_stf_phy_txant_upd(wlc);
|
||
|
|
}
|
||
|
|
|
||
|
|
void brcms_c_stf_phy_chain_calc(struct brcms_c_info *wlc)
|
||
|
|
{
|
||
|
|
struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
|
||
|
|
|
||
|
|
/* get available rx/tx chains */
|
||
|
|
wlc->stf->hw_txchain = sprom->txchain;
|
||
|
|
wlc->stf->hw_rxchain = sprom->rxchain;
|
||
|
|
|
||
|
|
/* these parameter are intended to be used for all PHY types */
|
||
|
|
if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) {
|
||
|
|
if (BRCMS_ISNPHY(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) hweight8(wlc->stf->hw_txchain);
|
||
|
|
|
||
|
|
if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) {
|
||
|
|
if (BRCMS_ISNPHY(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) hweight8(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;
|
||
|
|
brcms_c_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION);
|
||
|
|
}
|
||
|
|
|
||
|
|
static u16 _brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc,
|
||
|
|
u32 rspec)
|
||
|
|
{
|
||
|
|
u16 phytxant = wlc->stf->phytxant;
|
||
|
|
|
||
|
|
if (rspec_stf(rspec) != PHY_TXC1_MODE_SISO)
|
||
|
|
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 brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, u32 rspec)
|
||
|
|
{
|
||
|
|
return _brcms_c_stf_phytxchain_sel(wlc, rspec);
|
||
|
|
}
|
||
|
|
|
||
|
|
u16 brcms_c_stf_d11hdrs_phyctl_txant(struct brcms_c_info *wlc, u32 rspec)
|
||
|
|
{
|
||
|
|
u16 phytxant = wlc->stf->phytxant;
|
||
|
|
u16 mask = PHY_TXC_ANT_MASK;
|
||
|
|
|
||
|
|
/* for non-siso rates or default setting, use the available chains */
|
||
|
|
if (BRCMS_ISNPHY(wlc->band)) {
|
||
|
|
phytxant = _brcms_c_stf_phytxchain_sel(wlc, rspec);
|
||
|
|
mask = PHY_TXC_HTANT_MASK;
|
||
|
|
}
|
||
|
|
phytxant |= phytxant & mask;
|
||
|
|
return phytxant;
|
||
|
|
}
|