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Commit 339afc89 authored by Tomas Winkler's avatar Tomas Winkler Committed by John W. Linville
Browse files

iwlwifi: 5150 compute ct kill threshold 



This patch adds computation of ct kill threshold
for 5150. Threshold is computed from calibration
data in the EEPROM.

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 819500c5

drivers/net/wireless/iwlwifi/iwl-5000.c

+12 −1
Original line number Diff line number Diff line
@@ -426,6 +426,17 @@ static const u8 *iwl5000_eeprom_query_addr(const struct iwl_priv *priv, 
	return &priv->eeprom[address];

}



static s32 iwl5150_get_ct_threshold(struct iwl_priv *priv)

{

	const s32 volt2temp_coef = -5;

	u16 *temp_calib = (u16 *)iwl_eeprom_query_addr(priv,

						EEPROM_5000_TEMPERATURE);

	/* offset =  temperate -  voltage / coef */

	s32 offset = temp_calib[0] - temp_calib[1] / volt2temp_coef;

	s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD) - offset;

	return threshold * volt2temp_coef;

}



/*

 *  Calibration

 */
@@ -859,7 +870,7 @@ static int iwl5000_hw_set_hw_params(struct iwl_priv *priv) 
	case CSR_HW_REV_TYPE_5150:

		/* 5150 wants in Kelvin */

		priv->hw_params.ct_kill_threshold =

				CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);

				iwl5150_get_ct_threshold(priv);

		break;

	}

drivers/net/wireless/iwlwifi/iwl-eeprom.h

+1 −0
Original line number Diff line number Diff line
@@ -147,6 +147,7 @@ struct iwl_eeprom_channel { 
/*5000 calibrations */

#define EEPROM_5000_CALIB_ALL	(INDIRECT_ADDRESS | INDIRECT_CALIBRATION)

#define EEPROM_5000_XTAL	((2*0x128) | EEPROM_5000_CALIB_ALL)

#define EEPROM_5000_TEMPERATURE ((2*0x12A) | EEPROM_5000_CALIB_ALL)



/* 5000 links */

#define EEPROM_5000_LINK_HOST             (2*0x64)