ath9k中的EEPROM

reference：

AR93xx_AR94xx_AR95xx_EEPROM_Device_Configuration

compat-wireless-2014-03-31\drivers\net\wireless\ath\ath9k\ Ar9003_eeprom.h中定義了

struct ar9300_eeprom  其中保存了校準相關的數據變量， 如MAC地址，eepromVersion;

此數據結構值得研究，同時在sys文件系統了定義了查看這些變量值的接口,其交互的接口如下：

typedef struct ospreyEeprom {
    u_int8_t  eepromVersion;
    u_int8_t  templateVersion;
    u_int8_t  macAddr[6];
    u_int8_t  custData[OSPREY_CUSTOMER_DATA_SIZE];

    OSPREY_BASE_EEP_HEADER    baseEepHeader;

    OSPREY_MODAL_EEP_HEADER   modalHeader2G;
    OSPREY_BASE_EXTENSION_1 base_ext1;
    u_int8_t            calFreqPier2G[OSPREY_NUM_2G_CAL_PIERS];
    OSP_CAL_DATA_PER_FREQ_OP_LOOP calPierData2G[OSPREY_MAX_CHAINS][OSPREY_NUM_2G_CAL_PIERS];
    u_int8_t calTarget_freqbin_Cck[OSPREY_NUM_2G_CCK_TARGET_POWERS];
    u_int8_t calTarget_freqbin_2G[OSPREY_NUM_2G_20_TARGET_POWERS];
    u_int8_t calTarget_freqbin_2GHT20[OSPREY_NUM_2G_20_TARGET_POWERS];
    u_int8_t calTarget_freqbin_2GHT40[OSPREY_NUM_2G_40_TARGET_POWERS];
    CAL_TARGET_POWER_LEG calTargetPowerCck[OSPREY_NUM_2G_CCK_TARGET_POWERS];
    CAL_TARGET_POWER_LEG calTargetPower2G[OSPREY_NUM_2G_20_TARGET_POWERS];
    OSP_CAL_TARGET_POWER_HT  calTargetPower2GHT20[OSPREY_NUM_2G_20_TARGET_POWERS];
    OSP_CAL_TARGET_POWER_HT  calTargetPower2GHT40[OSPREY_NUM_2G_40_TARGET_POWERS];
    u_int8_t   ctlIndex_2G[OSPREY_NUM_CTLS_2G];
    u_int8_t   ctl_freqbin_2G[OSPREY_NUM_CTLS_2G][OSPREY_NUM_BAND_EDGES_2G];
    OSP_CAL_CTL_DATA_2G   ctlPowerData_2G[OSPREY_NUM_CTLS_2G];

    OSPREY_MODAL_EEP_HEADER   modalHeader5G;
    OSPREY_BASE_EXTENSION_2 base_ext2;
    u_int8_t            calFreqPier5G[OSPREY_NUM_5G_CAL_PIERS];
    OSP_CAL_DATA_PER_FREQ_OP_LOOP calPierData5G[OSPREY_MAX_CHAINS][OSPREY_NUM_5G_CAL_PIERS];
    u_int_t calTarget_freqbin_5G[OSPREY_NUM_5G_20_TARGET_POWERS];
    u_int8_t calTarget_freqbin_5GHT20[OSPREY_NUM_5G_20_TARGET_POWERS];
    u_int8_t calTarget_freqbin_5GHT40[OSPREY_NUM_5G_40_TARGET_POWERS];
    CAL_TARGET_POWER_LEG calTargetPower5G[OSPREY_NUM_5G_20_TARGET_POWERS];
    OSP_CAL_TARGET_POWER_HT  calTargetPower5GHT20[OSPREY_NUM_5G_20_TARGET_POWERS];
    OSP_CAL_TARGET_POWER_HT  calTargetPower5GHT40[OSPREY_NUM_5G_40_TARGET_POWERS];
    u_int8_t   ctlIndex_5G[OSPREY_NUM_CTLS_5G];
    u_int8_t   ctl_freqbin_5G[OSPREY_NUM_CTLS_5G][OSPREY_NUM_BAND_EDGES_5G];
    OSP_CAL_CTL_DATA_5G   ctlPowerData_5G[OSPREY_NUM_CTLS_5G];
} __packed ar9300_eeprom_t;

root@OpenWrt:/sys/kernel/debug/ieee80211# ls

phy0  phy1 此處說明系統有倆個wifi網卡,每一張都有自己的狀態信息。主要的文件有：modal_eeprom，rx_chainmask，tx_chainmask。

代碼當然入口點如下：

[   16.300000] ath_ahb_eeprom_read 

[   16.300000] ath9k_hw_use_flash

ar9300EepromDumpSupport(struct ath_hal *ah, void **ppE)
{
printk("ar9300EepromDumpSupport \n");
    *ppE = &(AH9300(ah)->ah_eeprom);
    return sizeof(ar9300_eeprom_t);
}