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iwlwifi: 5150 compute ct kill threshold

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

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Tomas Winkler 2008-12-01 16:32:20 -08:00 committed by John W. Linville
parent 819500c589
commit 339afc893d
2 changed files with 13 additions and 1 deletions
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13
drivers/net/wireless/iwlwifi/iwl-5000.c
View file

@ -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;
}

1
drivers/net/wireless/iwlwifi/iwl-eeprom.h
View file

@ -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)