ar2413.c.svn-base

最新之atheros芯片driver source code, 基于linux操作系统,內含atheros芯片HAL全部代码

/*
 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2008 Atheros Communications, Inc.
 *
 * 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.
 *
 * $Id: ar2413.c,v 1.8 2008/11/15 22:15:46 sam Exp $
 */
#include "opt_ah.h"

#include "ah.h"
#include "ah_internal.h"

#include "ar5212/ar5212.h"
#include "ar5212/ar5212reg.h"
#include "ar5212/ar5212phy.h"

#include "ah_eeprom_v3.h"

#define AH_5212_2413
#include "ar5212/ar5212.ini"

#define	N(a)	(sizeof(a)/sizeof(a[0]))

struct ar2413State {
	RF_HAL_FUNCS	base;		/* public state, must be first */
	uint16_t	pcdacTable[PWR_TABLE_SIZE_2413];

	uint32_t	Bank1Data[N(ar5212Bank1_2413)];
	uint32_t	Bank2Data[N(ar5212Bank2_2413)];
	uint32_t	Bank3Data[N(ar5212Bank3_2413)];
	uint32_t	Bank6Data[N(ar5212Bank6_2413)];
	uint32_t	Bank7Data[N(ar5212Bank7_2413)];

	/*
	 * Private state for reduced stack usage.
	 */
	/* filled out Vpd table for all pdGains (chanL) */
	uint16_t vpdTable_L[MAX_NUM_PDGAINS_PER_CHANNEL]
			    [MAX_PWR_RANGE_IN_HALF_DB];
	/* filled out Vpd table for all pdGains (chanR) */
	uint16_t vpdTable_R[MAX_NUM_PDGAINS_PER_CHANNEL]
			    [MAX_PWR_RANGE_IN_HALF_DB];
	/* filled out Vpd table for all pdGains (interpolated) */
	uint16_t vpdTable_I[MAX_NUM_PDGAINS_PER_CHANNEL]
			    [MAX_PWR_RANGE_IN_HALF_DB];
};
#define	AR2413(ah)	((struct ar2413State *) AH5212(ah)->ah_rfHal)

extern	void ar5212ModifyRfBuffer(uint32_t *rfBuf, uint32_t reg32,
		uint32_t numBits, uint32_t firstBit, uint32_t column);

static void
ar2413WriteRegs(struct ath_hal *ah, u_int modesIndex, u_int freqIndex,
	int writes)
{
	HAL_INI_WRITE_ARRAY(ah, ar5212Modes_2413, modesIndex, writes);
	HAL_INI_WRITE_ARRAY(ah, ar5212Common_2413, 1, writes);
	HAL_INI_WRITE_ARRAY(ah, ar5212BB_RfGain_2413, freqIndex, writes);
}

/*
 * Take the MHz channel value and set the Channel value
 *
 * ASSUMES: Writes enabled to analog bus
 */
static HAL_BOOL
ar2413SetChannel(struct ath_hal *ah,  HAL_CHANNEL_INTERNAL *chan)
{
	uint32_t channelSel  = 0;
	uint32_t bModeSynth  = 0;
	uint32_t aModeRefSel = 0;
	uint32_t reg32       = 0;
	uint16_t freq;

	OS_MARK(ah, AH_MARK_SETCHANNEL, chan->channel);

	if (chan->channel < 4800) {
		uint32_t txctl;

		if (((chan->channel - 2192) % 5) == 0) {
			channelSel = ((chan->channel - 672) * 2 - 3040)/10;
			bModeSynth = 0;
		} else if (((chan->channel - 2224) % 5) == 0) {
			channelSel = ((chan->channel - 704) * 2 - 3040) / 10;
			bModeSynth = 1;
		} else {
			HALDEBUG(ah, HAL_DEBUG_ANY,
			    "%s: invalid channel %u MHz\n",
			    __func__, chan->channel);
			return AH_FALSE;
		}

		channelSel = (channelSel << 2) & 0xff;
		channelSel = ath_hal_reverseBits(channelSel, 8);

		txctl = OS_REG_READ(ah, AR_PHY_CCK_TX_CTRL);
		if (chan->channel == 2484) {
			/* Enable channel spreading for channel 14 */
			OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
				txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
		} else {
			OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
				txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
		}
	} else if (((chan->channel % 5) == 2) && (chan->channel <= 5435)) {
		freq = chan->channel - 2; /* Align to even 5MHz raster */
		channelSel = ath_hal_reverseBits(
			(uint32_t)(((freq - 4800)*10)/25 + 1), 8);
            	aModeRefSel = ath_hal_reverseBits(0, 2);
	} else if ((chan->channel % 20) == 0 && chan->channel >= 5120) {
		channelSel = ath_hal_reverseBits(
			((chan->channel - 4800) / 20 << 2), 8);
		aModeRefSel = ath_hal_reverseBits(3, 2);
	} else if ((chan->channel % 10) == 0) {
		channelSel = ath_hal_reverseBits(
			((chan->channel - 4800) / 10 << 1), 8);
		aModeRefSel = ath_hal_reverseBits(2, 2);
	} else if ((chan->channel % 5) == 0) {
		channelSel = ath_hal_reverseBits(
			(chan->channel - 4800) / 5, 8);
		aModeRefSel = ath_hal_reverseBits(1, 2);
	} else {
		HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel %u MHz\n",
		    __func__, chan->channel);
		return AH_FALSE;
	}

	reg32 = (channelSel << 4) | (aModeRefSel << 2) | (bModeSynth << 1) |
			(1 << 12) | 0x1;
	OS_REG_WRITE(ah, AR_PHY(0x27), reg32 & 0xff);

	reg32 >>= 8;
	OS_REG_WRITE(ah, AR_PHY(0x36), reg32 & 0x7f);

	AH_PRIVATE(ah)->ah_curchan = chan;

	return AH_TRUE;
}

/*
 * Reads EEPROM header info from device structure and programs
 * all rf registers
 *
 * REQUIRES: Access to the analog rf device
 */
static HAL_BOOL
ar2413SetRfRegs(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *chan, uint16_t modesIndex, uint16_t *rfXpdGain)
{
#define	RF_BANK_SETUP(_priv, _ix, _col) do {				    \
	int i;								    \
	for (i = 0; i < N(ar5212Bank##_ix##_2413); i++)			    \
		(_priv)->Bank##_ix##Data[i] = ar5212Bank##_ix##_2413[i][_col];\
} while (0)
	struct ath_hal_5212 *ahp = AH5212(ah);
	const HAL_EEPROM *ee = AH_PRIVATE(ah)->ah_eeprom;
	uint16_t ob2GHz = 0, db2GHz = 0;
	struct ar2413State *priv = AR2413(ah);
	int regWrites = 0;

	HALDEBUG(ah, HAL_DEBUG_RFPARAM,
	    "%s: chan 0x%x flag 0x%x modesIndex 0x%x\n",
	    __func__, chan->channel, chan->channelFlags, modesIndex);

	HALASSERT(priv);

	/* Setup rf parameters */
	switch (chan->channelFlags & CHANNEL_ALL) {
	case CHANNEL_B:
		ob2GHz = ee->ee_obFor24;
		db2GHz = ee->ee_dbFor24;
		break;
	case CHANNEL_G:
	case CHANNEL_108G:
		ob2GHz = ee->ee_obFor24g;
		db2GHz = ee->ee_dbFor24g;
		break;
	default:
		HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel flags 0x%x\n",
		    __func__, chan->channelFlags);
		return AH_FALSE;
	}

	/* Bank 1 Write */
	RF_BANK_SETUP(priv, 1, 1);

	/* Bank 2 Write */
	RF_BANK_SETUP(priv, 2, modesIndex);

	/* Bank 3 Write */
	RF_BANK_SETUP(priv, 3, modesIndex);

	/* Bank 6 Write */
	RF_BANK_SETUP(priv, 6, modesIndex);

	ar5212ModifyRfBuffer(priv->Bank6Data, ob2GHz,   3, 168, 0);
	ar5212ModifyRfBuffer(priv->Bank6Data, db2GHz,   3, 165, 0);

	/* Bank 7 Setup */
	RF_BANK_SETUP(priv, 7, modesIndex);

	/* Write Analog registers */
	HAL_INI_WRITE_BANK(ah, ar5212Bank1_2413, priv->Bank1Data, regWrites);
	HAL_INI_WRITE_BANK(ah, ar5212Bank2_2413, priv->Bank2Data, regWrites);
	HAL_INI_WRITE_BANK(ah, ar5212Bank3_2413, priv->Bank3Data, regWrites);
	HAL_INI_WRITE_BANK(ah, ar5212Bank6_2413, priv->Bank6Data, regWrites);
	HAL_INI_WRITE_BANK(ah, ar5212Bank7_2413, priv->Bank7Data, regWrites);

	/* Now that we have reprogrammed rfgain value, clear the flag. */
	ahp->ah_rfgainState = HAL_RFGAIN_INACTIVE;

	return AH_TRUE;
#undef	RF_BANK_SETUP
}

/*
 * Return a reference to the requested RF Bank.
 */
static uint32_t *
ar2413GetRfBank(struct ath_hal *ah, int bank)
{
	struct ar2413State *priv = AR2413(ah);

	HALASSERT(priv != AH_NULL);
	switch (bank) {
	case 1: return priv->Bank1Data;
	case 2: return priv->Bank2Data;
	case 3: return priv->Bank3Data;
	case 6: return priv->Bank6Data;
	case 7: return priv->Bank7Data;
	}
	HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown RF Bank %d requested\n",
	    __func__, bank);
	return AH_NULL;
}

/*
 * Return indices surrounding the value in sorted integer lists.
 *
 * NB: the input list is assumed to be sorted in ascending order
 */
static void
GetLowerUpperIndex(int16_t v, const uint16_t *lp, uint16_t listSize,
                          uint32_t *vlo, uint32_t *vhi)
{
	int16_t target = v;
	const uint16_t *ep = lp+listSize;
	const uint16_t *tp;

	/*
	 * Check first and last elements for out-of-bounds conditions.
	 */
	if (target < lp[0]) {
		*vlo = *vhi = 0;
		return;
	}
	if (target >= ep[-1]) {
		*vlo = *vhi = listSize - 1;
		return;
	}

	/* look for value being near or between 2 values in list */
	for (tp = lp; tp < ep; tp++) {
		/*
		 * If value is close to the current value of the list
		 * then target is not between values, it is one of the values
		 */
		if (*tp == target) {
			*vlo = *vhi = tp - (const uint16_t *) lp;
			return;
		}
		/*
		 * Look for value being between current value and next value
		 * if so return these 2 values
		 */
		if (target < tp[1]) {
			*vlo = tp - (const uint16_t *) lp;
			*vhi = *vlo + 1;
			return;
		}
	}
}

/*
 * Fill the Vpdlist for indices Pmax-Pmin
 */
static HAL_BOOL
ar2413FillVpdTable(uint32_t pdGainIdx, int16_t Pmin, int16_t  Pmax,
		   const int16_t *pwrList, const uint16_t *VpdList,
		   uint16_t numIntercepts, uint16_t retVpdList[][64])
{
	uint16_t ii, jj, kk;
	int16_t currPwr = (int16_t)(2*Pmin);
	/* since Pmin is pwr*2 and pwrList is 4*pwr */
	uint32_t  idxL, idxR;

	ii = 0;
	jj = 0;

	if (numIntercepts < 2)
		return AH_FALSE;

	while (ii <= (uint16_t)(Pmax - Pmin)) {
		GetLowerUpperIndex(currPwr, (const uint16_t *) pwrList,
				   numIntercepts, &(idxL), &(idxR));
		if (idxR < 1)
			idxR = 1;			/* extrapolate below */
		if (idxL == (uint32_t)(numIntercepts - 1))
			idxL = numIntercepts - 2;	/* extrapolate above */
		if (pwrList[idxL] == pwrList[idxR])
			kk = VpdList[idxL];
		else
			kk = (uint16_t)
				(((currPwr - pwrList[idxL])*VpdList[idxR]+ 
				  (pwrList[idxR] - currPwr)*VpdList[idxL])/
				 (pwrList[idxR] - pwrList[idxL]));
		retVpdList[pdGainIdx][ii] = kk;
		ii++;
		currPwr += 2;				/* half dB steps */
	}

	return AH_TRUE;
}

/*
 * Returns interpolated or the scaled up interpolated value
 */
static int16_t
interpolate_signed(uint16_t target, uint16_t srcLeft, uint16_t srcRight,
	int16_t targetLeft, int16_t targetRight)
{
	int16_t rv;

	if (srcRight != srcLeft) {
		rv = ((target - srcLeft)*targetRight +
		      (srcRight - target)*targetLeft) / (srcRight - srcLeft);
	} else {
		rv = targetLeft;
	}
	return rv;
}

/*
 * Uses the data points read from EEPROM to reconstruct the pdadc power table
 * Called by ar2413SetPowerTable()
 */
static int 
ar2413getGainBoundariesAndPdadcsForPowers(struct ath_hal *ah, uint16_t channel,
		const RAW_DATA_STRUCT_2413 *pRawDataset,
		uint16_t pdGainOverlap_t2, 
		int16_t  *pMinCalPower, uint16_t pPdGainBoundaries[], 
		uint16_t pPdGainValues[], uint16_t pPDADCValues[]) 
{
	struct ar2413State *priv = AR2413(ah);
#define	VpdTable_L	priv->vpdTable_L
#define	VpdTable_R	priv->vpdTable_R
#define	VpdTable_I	priv->vpdTable_I
	uint32_t ii, jj, kk;
	int32_t ss;/* potentially -ve index for taking care of pdGainOverlap */
	uint32_t idxL, idxR;
	uint32_t numPdGainsUsed = 0;
	/* 
	 * If desired to support -ve power levels in future, just
	 * change pwr_I_0 to signed 5-bits.
	 */
	int16_t Pmin_t2[MAX_NUM_PDGAINS_PER_CHANNEL];
	/* to accomodate -ve power levels later on. */
	int16_t Pmax_t2[MAX_NUM_PDGAINS_PER_CHANNEL];
	/* to accomodate -ve power levels later on */
	uint16_t numVpd = 0;