diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_calib.c')
-rw-r--r-- | qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_calib.c | 403 |
1 files changed, 0 insertions, 403 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_calib.c b/qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_calib.c deleted file mode 100644 index 6f3e07e6d..000000000 --- a/qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_calib.c +++ /dev/null @@ -1,403 +0,0 @@ -/* - * Copyright (c) 2008-2011 Atheros Communications Inc. - * - * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011 - * Original from Linux kernel 3.0.1 - * - * 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 "hw.h" -#include "hw-ops.h" - -/* Common calibration code */ - -#define ATH9K_NF_TOO_HIGH -60 - -static int16_t ath9k_hw_get_nf_hist_mid(int16_t *nfCalBuffer) -{ - int16_t nfval; - int16_t sort[ATH9K_NF_CAL_HIST_MAX]; - int i, j; - - for (i = 0; i < ATH9K_NF_CAL_HIST_MAX; i++) - sort[i] = nfCalBuffer[i]; - - for (i = 0; i < ATH9K_NF_CAL_HIST_MAX - 1; i++) { - for (j = 1; j < ATH9K_NF_CAL_HIST_MAX - i; j++) { - if (sort[j] > sort[j - 1]) { - nfval = sort[j]; - sort[j] = sort[j - 1]; - sort[j - 1] = nfval; - } - } - } - nfval = sort[(ATH9K_NF_CAL_HIST_MAX - 1) >> 1]; - - return nfval; -} - -static struct ath_nf_limits *ath9k_hw_get_nf_limits(struct ath_hw *ah, - struct ath9k_channel *chan) -{ - struct ath_nf_limits *limit; - - if (!chan || IS_CHAN_2GHZ(chan)) - limit = &ah->nf_2g; - else - limit = &ah->nf_5g; - - return limit; -} - -static s16 ath9k_hw_get_default_nf(struct ath_hw *ah, - struct ath9k_channel *chan) -{ - return ath9k_hw_get_nf_limits(ah, chan)->nominal; -} - - -static void ath9k_hw_update_nfcal_hist_buffer(struct ath_hw *ah, - struct ath9k_hw_cal_data *cal, - int16_t *nfarray) -{ - struct ath_nf_limits *limit; - struct ath9k_nfcal_hist *h; - int high_nf_mid = 0; - u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask; - int i; - - h = cal->nfCalHist; - limit = ath9k_hw_get_nf_limits(ah, ah->curchan); - - for (i = 0; i < NUM_NF_READINGS; i++) { - if (!(chainmask & (1 << i)) || - (i >= AR5416_MAX_CHAINS)) - continue; - - h[i].nfCalBuffer[h[i].currIndex] = nfarray[i]; - - if (++h[i].currIndex >= ATH9K_NF_CAL_HIST_MAX) - h[i].currIndex = 0; - - if (h[i].invalidNFcount > 0) { - h[i].invalidNFcount--; - h[i].privNF = nfarray[i]; - } else { - h[i].privNF = - ath9k_hw_get_nf_hist_mid(h[i].nfCalBuffer); - } - - if (!h[i].privNF) - continue; - - if (h[i].privNF > limit->max) { - high_nf_mid = 1; - - DBG2("ath9k: " - "NFmid[%d] (%d) > MAX (%d), %s\n", - i, h[i].privNF, limit->max, - (cal->nfcal_interference ? - "not corrected (due to interference)" : - "correcting to MAX")); - - /* - * Normally we limit the average noise floor by the - * hardware specific maximum here. However if we have - * encountered stuck beacons because of interference, - * we bypass this limit here in order to better deal - * with our environment. - */ - if (!cal->nfcal_interference) - h[i].privNF = limit->max; - } - } - - /* - * If the noise floor seems normal for all chains, assume that - * there is no significant interference in the environment anymore. - * Re-enable the enforcement of the NF maximum again. - */ - if (!high_nf_mid) - cal->nfcal_interference = 0; -} - -static int ath9k_hw_get_nf_thresh(struct ath_hw *ah, - int band, - int16_t *nft) -{ - switch (band) { - case NET80211_BAND_5GHZ: - *nft = (int8_t)ah->eep_ops->get_eeprom(ah, EEP_NFTHRESH_5); - break; - case NET80211_BAND_2GHZ: - *nft = (int8_t)ah->eep_ops->get_eeprom(ah, EEP_NFTHRESH_2); - break; - default: - return 0; - } - - return 1; -} - -void ath9k_hw_reset_calibration(struct ath_hw *ah, - struct ath9k_cal_list *currCal) -{ - int i; - - ath9k_hw_setup_calibration(ah, currCal); - - currCal->calState = CAL_RUNNING; - - for (i = 0; i < AR5416_MAX_CHAINS; i++) { - ah->meas0.sign[i] = 0; - ah->meas1.sign[i] = 0; - ah->meas2.sign[i] = 0; - ah->meas3.sign[i] = 0; - } - - ah->cal_samples = 0; -} - -/* This is done for the currently configured channel */ -int ath9k_hw_reset_calvalid(struct ath_hw *ah) -{ - struct ath9k_cal_list *currCal = ah->cal_list_curr; - - if (!ah->caldata) - return 1; - - if (!AR_SREV_9100(ah) && !AR_SREV_9160_10_OR_LATER(ah)) - return 1; - - if (currCal == NULL) - return 1; - - if (currCal->calState != CAL_DONE) { - DBG("ath9k: " - "Calibration state incorrect, %d\n", - currCal->calState); - return 1; - } - - if (!(ah->supp_cals & currCal->calData->calType)) - return 1; - - DBG("ath9k: " - "Resetting Cal %d state for channel %d\n", - currCal->calData->calType, (ah->dev->channels + ah->dev->channel)->center_freq); - - ah->caldata->CalValid &= ~currCal->calData->calType; - currCal->calState = CAL_WAITING; - - return 0; -} - -void ath9k_hw_start_nfcal(struct ath_hw *ah, int update) -{ - if (ah->caldata) - ah->caldata->nfcal_pending = 1; - - REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, - AR_PHY_AGC_CONTROL_ENABLE_NF); - - if (update) - REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, - AR_PHY_AGC_CONTROL_NO_UPDATE_NF); - else - REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, - AR_PHY_AGC_CONTROL_NO_UPDATE_NF); - - REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); -} - -void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan) -{ - struct ath9k_nfcal_hist *h = NULL; - unsigned i, j; - int32_t val; - u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask; - s16 default_nf = ath9k_hw_get_default_nf(ah, chan); - - if (ah->caldata) - h = ah->caldata->nfCalHist; - - for (i = 0; i < NUM_NF_READINGS; i++) { - if (chainmask & (1 << i)) { - s16 nfval; - - if (i >= AR5416_MAX_CHAINS) - continue; - - if (h) - nfval = h[i].privNF; - else - nfval = default_nf; - - val = REG_READ(ah, ah->nf_regs[i]); - val &= 0xFFFFFE00; - val |= (((u32) nfval << 1) & 0x1ff); - REG_WRITE(ah, ah->nf_regs[i], val); - } - } - - /* - * Load software filtered NF value into baseband internal minCCApwr - * variable. - */ - REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, - AR_PHY_AGC_CONTROL_ENABLE_NF); - REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, - AR_PHY_AGC_CONTROL_NO_UPDATE_NF); - REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); - - /* - * Wait for load to complete, should be fast, a few 10s of us. - * The max delay was changed from an original 250us to 10000us - * since 250us often results in NF load timeout and causes deaf - * condition during stress testing 12/12/2009 - */ - for (j = 0; j < 10000; j++) { - if ((REG_READ(ah, AR_PHY_AGC_CONTROL) & - AR_PHY_AGC_CONTROL_NF) == 0) - break; - udelay(10); - } - - /* - * We timed out waiting for the noisefloor to load, probably due to an - * in-progress rx. Simply return here and allow the load plenty of time - * to complete before the next calibration interval. We need to avoid - * trying to load -50 (which happens below) while the previous load is - * still in progress as this can cause rx deafness. Instead by returning - * here, the baseband nf cal will just be capped by our present - * noisefloor until the next calibration timer. - */ - if (j == 10000) { - DBG("ath9k: " - "Timeout while waiting for nf to load: AR_PHY_AGC_CONTROL=0x%x\n", - REG_READ(ah, AR_PHY_AGC_CONTROL)); - return; - } - - /* - * Restore maxCCAPower register parameter again so that we're not capped - * by the median we just loaded. This will be initial (and max) value - * of next noise floor calibration the baseband does. - */ - ENABLE_REGWRITE_BUFFER(ah); - for (i = 0; i < NUM_NF_READINGS; i++) { - if (chainmask & (1 << i)) { - if (i >= AR5416_MAX_CHAINS) - continue; - - val = REG_READ(ah, ah->nf_regs[i]); - val &= 0xFFFFFE00; - val |= (((u32) (-50) << 1) & 0x1ff); - REG_WRITE(ah, ah->nf_regs[i], val); - } - } - REGWRITE_BUFFER_FLUSH(ah); -} - - -static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf) -{ - struct ath_nf_limits *limit; - int i; - - if (IS_CHAN_2GHZ(ah->curchan)) - limit = &ah->nf_2g; - else - limit = &ah->nf_5g; - - for (i = 0; i < NUM_NF_READINGS; i++) { - if (!nf[i]) - continue; - - DBG2("ath9k: " - "NF calibrated [%s] [chain %d] is %d\n", - (i >= 3 ? "ext" : "ctl"), i % 3, nf[i]); - - if (nf[i] > ATH9K_NF_TOO_HIGH) { - DBG("ath9k: " - "NF[%d] (%d) > MAX (%d), correcting to MAX\n", - i, nf[i], ATH9K_NF_TOO_HIGH); - nf[i] = limit->max; - } else if (nf[i] < limit->min) { - DBG("ath9k: " - "NF[%d] (%d) < MIN (%d), correcting to NOM\n", - i, nf[i], limit->min); - nf[i] = limit->nominal; - } - } -} - -int ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan) -{ - int16_t nf, nfThresh; - int16_t nfarray[NUM_NF_READINGS] = { 0 }; - struct ath9k_nfcal_hist *h; - struct net80211_channel *c = chan->chan; - struct ath9k_hw_cal_data *caldata = ah->caldata; - - chan->channelFlags &= (~CHANNEL_CW_INT); - if (REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) { - DBG("ath9k: " - "NF did not complete in calibration window\n"); - return 0; - } - - ath9k_hw_do_getnf(ah, nfarray); - ath9k_hw_nf_sanitize(ah, nfarray); - nf = nfarray[0]; - if (ath9k_hw_get_nf_thresh(ah, c->band, &nfThresh) - && nf > nfThresh) { - DBG2("ath9k: " - "noise floor failed detected; detected %d, threshold %d\n", - nf, nfThresh); - chan->channelFlags |= CHANNEL_CW_INT; - } - - if (!caldata) { - chan->noisefloor = nf; - return 0; - } - - h = caldata->nfCalHist; - caldata->nfcal_pending = 0; - ath9k_hw_update_nfcal_hist_buffer(ah, caldata, nfarray); - chan->noisefloor = h[0].privNF; - return 1; -} - -void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah, - struct ath9k_channel *chan) -{ - struct ath9k_nfcal_hist *h; - s16 default_nf; - int i, j; - - ah->caldata->channel = chan->channel; - ah->caldata->channelFlags = chan->channelFlags & ~CHANNEL_CW_INT; - h = ah->caldata->nfCalHist; - default_nf = ath9k_hw_get_default_nf(ah, chan); - for (i = 0; i < NUM_NF_READINGS; i++) { - h[i].currIndex = 0; - h[i].privNF = default_nf; - h[i].invalidNFcount = AR_PHY_CCA_FILTERWINDOW_LENGTH; - for (j = 0; j < ATH9K_NF_CAL_HIST_MAX; j++) { - h[i].nfCalBuffer[j] = default_nf; - } - } -} |