bcm43xx_phy.c

博通的bcm43xx系列Minipci接口无线网卡驱动

	struct bcm43xx_radioinfo *radio = bcm->current_core->radio;
	struct bcm43xx_phyinfo *phy = bcm->current_core->phy;
	
	if (phy->savedpctlreg == 0xFFFF)
		return;
	if ((bcm->board_type == 0x0416) &&
	    (bcm->board_vendor == PCI_VENDOR_ID_BROADCOM))
		return;
	
	switch (phy->type) {
	case BCM43xx_PHYTYPE_A: {

		TODO(); //TODO: Nothing for A PHYs yet :-/

		break;
	}
	case BCM43xx_PHYTYPE_B:
	case BCM43xx_PHYTYPE_G: {
		u16 tmp;
		u16 txpower;
		s8 v0, v1, v2, v3;
		s8 average;
		u8 max_pwr;
		s16 desired_pwr, estimated_pwr, pwr_adjust;
		s16 radio_att_delta, baseband_att_delta;
		s16 radio_attenuation, baseband_attenuation;
		unsigned long phylock_flags;

		tmp = bcm43xx_shm_read16(bcm, BCM43xx_SHM_SHARED, 0x0058);
		v0 = (s8)(tmp & 0x00FF);
		v1 = (s8)((tmp & 0xFF00) >> 8);
		tmp = bcm43xx_shm_read16(bcm, BCM43xx_SHM_SHARED, 0x005A);
		v2 = (s8)(tmp & 0x00FF);
		v3 = (s8)((tmp & 0xFF00) >> 8);
		tmp = 0;

		if (v0 == 0x7F || v1 == 0x7F || v2 == 0x7F || v3 == 0x7F) {
			tmp = bcm43xx_shm_read16(bcm, BCM43xx_SHM_SHARED, 0x0070);
			v0 = (s8)(tmp & 0x00FF);
			v1 = (s8)((tmp & 0xFF00) >> 8);
			tmp = bcm43xx_shm_read16(bcm, BCM43xx_SHM_SHARED, 0x0072);
			v2 = (s8)(tmp & 0x00FF);
			v3 = (s8)((tmp & 0xFF00) >> 8);
			if (v0 == 0x7F || v1 == 0x7F || v2 == 0x7F || v3 == 0x7F)
				return;
			v0 = (v0 + 0x20) & 0x3F;
			v1 = (v1 + 0x20) & 0x3F;
			v2 = (v2 + 0x20) & 0x3F;
			v3 = (v3 + 0x20) & 0x3F;
			tmp = 1;
		}
		bcm43xx_radio_clear_tssi(bcm);

		average = (v0 + v1 + v2 + v3 + 2) / 4;

		if (tmp && (bcm43xx_shm_read16(bcm, BCM43xx_SHM_SHARED, 0x005E) & 0x8))
			average -= 13;

		estimated_pwr = bcm43xx_phy_estimate_power_out(bcm, average);

		max_pwr = bcm->sprom.maxpower_bgphy;

		if ((bcm->sprom.boardflags & BCM43xx_BFL_PACTRL) &&
		    (phy->type == BCM43xx_PHYTYPE_G))
			max_pwr -= 0x3;

		/*TODO:
		max_pwr = min(REG - bcm->sprom.antennagain_bgphy - 0x6, max_pwr)
			where REG is the max power as per the regulatory domain
		*/

		desired_pwr = limit_value(radio->txpower_desired, 0, max_pwr);
		/* Check if we need to adjust the current power. */
		pwr_adjust = desired_pwr - estimated_pwr;
		radio_att_delta = -(pwr_adjust + 7) >> 3;
		baseband_att_delta = -(pwr_adjust >> 1) - (4 * radio_att_delta);
		if ((radio_att_delta == 0) && (baseband_att_delta == 0)) {
			bcm43xx_phy_lo_mark_current_used(bcm);
			return;
		}

		/* Calculate the new attenuation values. */
		baseband_attenuation = radio->txpower[0];
		baseband_attenuation += baseband_att_delta;
		radio_attenuation = radio->txpower[1];
		radio_attenuation += radio_att_delta;

		/* Get baseband and radio attenuation values into their permitted ranges.
		 * baseband 0-11, radio 0-9.
		 * Radio attenuation affects power level 4 times as much as baseband.
		 */
		if (radio_attenuation < 0) {
			baseband_attenuation -= (4 * -radio_attenuation);
			radio_attenuation = 0;
		} else if (radio_attenuation > 9) {
			baseband_attenuation += (4 * (radio_attenuation - 9));
			radio_attenuation = 9;
		} else {
			while (baseband_attenuation < 0 && radio_attenuation > 0) {
				baseband_attenuation += 4;
				radio_attenuation--;
			}
			while (baseband_attenuation > 11 && radio_attenuation < 9) {
				baseband_attenuation -= 4;
				radio_attenuation++;
			}
		}
		baseband_attenuation = limit_value(baseband_attenuation, 0, 11);

		txpower = radio->txpower[2];
		if ((radio->version == 0x2050) && (radio->revision == 2)) {
			if (radio_attenuation <= 1) {
				if (txpower == 0) {
					txpower = 3;
					radio_attenuation += 2;
					baseband_attenuation += 2;
				} else if (bcm->sprom.boardflags & BCM43xx_BFL_PACTRL) {
					baseband_attenuation += 4 * (radio_attenuation - 2);
					radio_attenuation = 2;
				}
			} else if (radio_attenuation > 4 && txpower != 0) {
				txpower = 0;
				if (baseband_attenuation < 3) {
					radio_attenuation -= 3;
					baseband_attenuation += 2;
				} else {
					radio_attenuation -= 2;
					baseband_attenuation -= 2;
				}
			}
		}
		radio->txpower[2] = txpower;
		baseband_attenuation = limit_value(baseband_attenuation, 0, 11);
		radio_attenuation = limit_value(radio_attenuation, 0, 9);

		bcm43xx_phy_lock(bcm, phylock_flags);
		bcm43xx_radio_lock(bcm);
		bcm43xx_radio_set_txpower_bg(bcm, baseband_attenuation,
					     radio_attenuation, txpower);
		bcm43xx_phy_lo_mark_current_used(bcm);
		bcm43xx_radio_unlock(bcm);
		bcm43xx_phy_unlock(bcm, phylock_flags);
		break;
	}
	default:
		assert(0);
	}
}

static inline
s32 bcm43xx_tssi2dbm_ad(s32 num, s32 den)
{
	if (num < 0)
		return num/den;
	else
		return (num+den/2)/den;
}

static inline
s8 bcm43xx_tssi2dbm_entry(s8 entry [], u8 index, s16 pab0, s16 pab1, s16 pab2)
{
	s32 m1, m2, f = 256, q, delta;
	s8 i = 0;
	
	m1 = bcm43xx_tssi2dbm_ad(16 * pab0 + index * pab1, 32);
	m2 = max(bcm43xx_tssi2dbm_ad(32768 + index * pab2, 256), 1);
	do {
		if (i > 15)
			return -EINVAL;
		q = bcm43xx_tssi2dbm_ad(f * 4096 -
					bcm43xx_tssi2dbm_ad(m2 * f, 16) * f, 2048);
		delta = abs(q - f);
		f = q;
		i++;
	} while (delta >= 2);
	entry[index] = limit_value(bcm43xx_tssi2dbm_ad(m1 * f, 8192), -127, 128);
	return 0;
}

/* http://bcm-specs.sipsolutions.net/TSSI_to_DBM_Table */
int bcm43xx_phy_init_tssi2dbm_table(struct bcm43xx_private *bcm)
{
	struct bcm43xx_phyinfo *phy = bcm->current_core->phy;
	struct bcm43xx_radioinfo *radio = bcm->current_core->radio;
	s16 pab0, pab1, pab2;
	u8 idx;
	s8 *dyn_tssi2dbm;
	
	if (phy->type == BCM43xx_PHYTYPE_A) {
		pab0 = (s16)(bcm->sprom.pa1b0);
		pab1 = (s16)(bcm->sprom.pa1b1);
		pab2 = (s16)(bcm->sprom.pa1b2);
	} else {
		pab0 = (s16)(bcm->sprom.pa0b0);
		pab1 = (s16)(bcm->sprom.pa0b1);
		pab2 = (s16)(bcm->sprom.pa0b2);
	}

	if ((bcm->chip_id == 0x4301) && (radio->version != 0x2050)) {
		phy->idle_tssi = 0x34;
		phy->tssi2dbm = bcm43xx_tssi2dbm_b_table;
		return 0;
	}

	if (pab0 != 0 && pab1 != 0 && pab2 != 0 &&
	    pab0 != -1 && pab1 != -1 && pab2 != -1) {
		/* The pabX values are set in SPROM. Use them. */
		if (phy->type == BCM43xx_PHYTYPE_A) {
			if ((s8)bcm->sprom.idle_tssi_tgt_aphy != 0 &&
			    (s8)bcm->sprom.idle_tssi_tgt_aphy != -1)
				phy->idle_tssi = (s8)(bcm->sprom.idle_tssi_tgt_aphy);
			else
				phy->idle_tssi = 62;
		} else {
			if ((s8)bcm->sprom.idle_tssi_tgt_bgphy != 0 &&
			    (s8)bcm->sprom.idle_tssi_tgt_bgphy != -1)
				phy->idle_tssi = (s8)(bcm->sprom.idle_tssi_tgt_bgphy);
			else
				phy->idle_tssi = 62;
		}
		dyn_tssi2dbm = kmalloc(64, GFP_KERNEL);
		if (dyn_tssi2dbm == NULL) {
			printk(KERN_ERR PFX "Could not allocate memory"
					    "for tssi2dbm table\n");
			return -ENOMEM;
		}
		for (idx = 0; idx < 64; idx++)
			if (bcm43xx_tssi2dbm_entry(dyn_tssi2dbm, idx, pab0, pab1, pab2)) {
				phy->tssi2dbm = NULL;
				printk(KERN_ERR PFX "Could not generate "
						    "tssi2dBm table\n");
				return -ENODEV;
			}
		phy->tssi2dbm = dyn_tssi2dbm;
		phy->dyn_tssi_tbl = 1;
	} else {
		/* pabX values not set in SPROM. */
		switch (phy->type) {
		case BCM43xx_PHYTYPE_A:
			/* APHY needs a generated table. */
			phy->tssi2dbm = NULL;
			printk(KERN_ERR PFX "Could not generate tssi2dBm "
					    "table (wrong SPROM info)!\n");
			return -ENODEV;
		case BCM43xx_PHYTYPE_B:
			phy->idle_tssi = 0x34;
			phy->tssi2dbm = bcm43xx_tssi2dbm_b_table;
			break;
		case BCM43xx_PHYTYPE_G:
			phy->idle_tssi = 0x34;
			phy->tssi2dbm = bcm43xx_tssi2dbm_g_table;
			break;
		}
	}

	return 0;
}

int bcm43xx_phy_init(struct bcm43xx_private *bcm)
{
	struct bcm43xx_phyinfo *phy = bcm->current_core->phy;
	int err = -ENODEV;
	unsigned long flags;

	/* We do not want to be preempted while calibrating
	 * the hardware.
	 */
	local_irq_save(flags);

	switch (phy->type) {
	case BCM43xx_PHYTYPE_A:
		if (phy->rev == 2 || phy->rev == 3) {
			bcm43xx_phy_inita(bcm);
			err = 0;
		}
		break;
	case BCM43xx_PHYTYPE_B:
		switch (phy->rev) {
		case 2:
			bcm43xx_phy_initb2(bcm);
			err = 0;
			break;
		case 4:
			bcm43xx_phy_initb4(bcm);
			err = 0;
			break;
		case 5:
			bcm43xx_phy_initb5(bcm);
			err = 0;
			break;
		case 6:
			bcm43xx_phy_initb6(bcm);
			err = 0;
			break;
		}
		break;
	case BCM43xx_PHYTYPE_G:
		bcm43xx_phy_initg(bcm);
		err = 0;
		break;
	}
	local_irq_restore(flags);
	if (err)
		printk(KERN_WARNING PFX "Unknown PHYTYPE found!\n");

	return err;
}

void bcm43xx_phy_set_antenna_diversity(struct bcm43xx_private *bcm)
{
	struct bcm43xx_phyinfo *phy = bcm->current_core->phy;
	u16 antennadiv;
	u16 offset;
	u16 value;
	u32 ucodeflags;

	antennadiv = phy->antenna_diversity;

	if (antennadiv == 0xFFFF)
		antennadiv = 3;
	assert(antennadiv <= 3);

	ucodeflags = bcm43xx_shm_read32(bcm, BCM43xx_SHM_SHARED,
					BCM43xx_UCODEFLAGS_OFFSET);
	bcm43xx_shm_write32(bcm, BCM43xx_SHM_SHARED,
			    BCM43xx_UCODEFLAGS_OFFSET,
			    ucodeflags & ~BCM43xx_UCODEFLAG_AUTODIV);

	switch (phy->type) {
	case BCM43xx_PHYTYPE_A:
	case BCM43xx_PHYTYPE_G:
		if (phy->type == BCM43xx_PHYTYPE_A)
			offset = 0x0000;
		else
			offset = 0x0400;

		if (antennadiv == 2)
			value = (3/*automatic*/ << 7);
		else
			value = (antennadiv << 7);
		bcm43xx_phy_write(bcm, offset + 1,
				  (bcm43xx_phy_read(bcm, offset + 1)
				   & 0x7E7F) | value);

		if (antennadiv >= 2) {
			if (antennadiv == 2)
				value = (antennadiv << 7);
			else
				value = (0/*force0*/ << 7);
			bcm43xx_phy_write(bcm, offset + 0x2B,
					  (bcm43xx_phy_read(bcm, offset + 0x2B)
					   & 0xFEFF) | value);
		}

		if (phy->type == BCM43xx_PHYTYPE_G) {
			if (antennadiv >= 2)
				bcm43xx_phy_write(bcm, 0x048C,
						  bcm43xx_phy_read(bcm, 0x048C)
						   | 0x2000);
			else
				bcm43xx_phy_write(bcm, 0x048C,
						  bcm43xx_phy_read(bcm, 0x048C)
						   & ~0x2000);
			if (phy->rev >= 2) {
				bcm43xx_phy_write(bcm, 0x0461,
						  bcm43xx_phy_read(bcm, 0x0461)
						   | 0x0010);
				bcm43xx_phy_write(bcm, 0x04AD,
						  (bcm43xx_phy_read(bcm, 0x04AD)
						   & 0x00FF) | 0x0015);
				if (phy->rev == 2)
					bcm43xx_phy_write(bcm, 0x0427, 0x0008);
				else
					bcm43xx_phy_write(bcm, 0x0427,
						(bcm43xx_phy_read(bcm, 0x0427)
						 & 0x00FF) | 0x0008);
			}
			else if (phy->rev >= 6)
				bcm43xx_phy_write(bcm, 0x049B, 0x00DC);
		} else {
			if (phy->rev < 3)
				bcm43xx_phy_write(bcm, 0x002B,
						  (bcm43xx_phy_read(bcm, 0x002B)
						   & 0x00FF) | 0x0024);
			else {
				bcm43xx_phy_write(bcm, 0x0061,
						  bcm43xx_phy_read(bcm, 0x0061)
						   | 0x0010);
				if (phy->rev == 3) {
					bcm43xx_phy_write(bcm, 0x0093, 0x001D);
					bcm43xx_phy_write(bcm, 0x0027, 0x0008);
				} else {
					bcm43xx_phy_write(bcm, 0x0093, 0x003A);
					bcm43xx_phy_write(bcm, 0x0027,
						(bcm43xx_phy_read(bcm, 0x0027)
						 & 0x00FF) | 0x0008);
				}
			}
		}
		break;
	case BCM43xx_PHYTYPE_B:
		if (bcm->current_core->rev == 2)
			value = (3/*automatic*/ << 7);
		else
			value = (antennadiv << 7);
		bcm43xx_phy_write(bcm, 0x03E2,
				  (bcm43xx_phy_read(bcm, 0x03E2)
				   & 0xFE7F) | value);
		break;
	default:
		assert(0);
	}

	if (antennadiv >= 2) {
		ucodeflags = bcm43xx_shm_read32(bcm, BCM43xx_SHM_SHARED,
						BCM43xx_UCODEFLAGS_OFFSET);
		bcm43xx_shm_write32(bcm, BCM43xx_SHM_SHARED,
				    BCM43xx_UCODEFLAGS_OFFSET,
				    ucodeflags | BCM43xx_UCODEFLAG_AUTODIV);
	}

	phy->antenna_diversity = antennadiv;
}