source: ReferenceDesigns/w3_802.11/c/wlan_w3_common/w3_common.c

#include "stdlib.h"
#include "string.h"
#include "stdarg.h"

#include "xil_io.h"
#include "xstatus.h"
#include "xparameters.h"

#include "wlan_platform_common.h"
#include "w3_common.h"
#include "w3_userio_util.h"
#include "wlan_mac_common.h"
#include "w3_iic_eeprom.h"
#include "w3_sysmon_util.h"
#include "wlan_cpu_id.h"
#include "w3_userio.h"
#include "wlan_platform_debug_hdr.h"



static const platform_common_dev_info_t platform_common_dev_info = {
        .platform_id = PLATFORM_ID_W3,
        .cpu_id = XPAR_CPU_ID,
#if WLAN_COMPILE_FOR_CPU_HIGH
        .is_cpu_high = 1,
        .is_cpu_low = 0,
#endif
#if WLAN_COMPILE_FOR_CPU_LOW
        .is_cpu_high = 0,
        .is_cpu_low = 1,
#endif
        .mailbox_dev_id = PLATFORM_DEV_ID_MAILBOX,
        .pkt_buf_mutex_dev_id = PLATFORM_DEV_ID_PKT_BUF_MUTEX,
        .tx_pkt_buf_baseaddr = XPAR_PKT_BUFF_TX_BRAM_CTRL_S_AXI_BASEADDR,
        .rx_pkt_buf_baseaddr = XPAR_PKT_BUFF_RX_BRAM_CTRL_S_AXI_BASEADDR,
        .tx_power_max_dbm = TX_POWER_MAX_DBM,
        .tx_power_min_dbm = TX_POWER_MIN_DBM,
        .tx_radio_prep_latency_100ns = 3, //(~300 nsec radio_controller TxEn process) + (~1.4 usec baseband -> antenna port)
        .tx_analog_latency_100ns = 14,   //(~1.4 usec baseband -> antenna port)
        .rx_analog_latency_100ns = 14,   //(~1.4 usec antenna port -> baseband)
        .capabilities_flags = PLATFORM_CAPABILITIES_FLAGS_SUPPORTS_PER_TX_POWER
};

static const char serial_number_prefix[] = "W3-a";

platform_common_dev_info_t wlan_platform_common_get_dev_info(){
    return platform_common_dev_info;
}

int wlan_platform_common_init(){
    u32 iter = 0;
    while (iic_eeprom_init(EEPROM_BASEADDR, 0x64, XPAR_CPU_ID) != IIC_EEPROM_SUCCESS){
        iter++;
    };

    // ------------------------------------------
    // Initialize the System Monitor
    init_sysmon();

    //Use entropy source to seed PRNG
    u32 temp_curr = 0;
    u32 temp_prev = 0;
    u32 rand_seed = 0;
    u8 num_bits = 0;

    while(1){
        temp_curr = wlan_platform_get_current_temp();

        if ((temp_curr == temp_prev) && (iter < 1000000)){
            iter++;
        } else {

            temp_prev = temp_curr;
            iter = 0;

            rand_seed = (rand_seed<<1) | (temp_curr&1);
            num_bits++;

            if(num_bits > 32){
                break;
            }
        }

    }


    xil_printf("Rand Seed: 0x%08x\n", rand_seed);
    srand(rand_seed);


    return WLAN_SUCCESS;
}

wlan_mac_hw_info_t wlan_platform_get_hw_info(){

    static u32 already_read = 0;
    static wlan_mac_hw_info_t mac_hw_info;

    if(already_read == 0){
        // Set General Node information
        mac_hw_info.platform_id = PLATFORM_ID_W3;
        mac_hw_info.platform_config = PLATFORM_CONFIG;
        mac_hw_info.serial_number_prefix = serial_number_prefix;
        mac_hw_info.serial_number = w3_eeprom_read_serial_num(EEPROM_BASEADDR);

        // Set HW Addresses
        //   - The w3_eeprom_read_eth_addr() function handles the case when the WARP v3
        //     hardware does not have a valid Ethernet address
        //
        // Use address 0 for the WLAN interface, address 1 for the WLAN Exp interface
        //
        w3_eeprom_read_eth_addr(EEPROM_BASEADDR, 0, mac_hw_info.hw_addr_wlan);
        w3_eeprom_read_eth_addr(EEPROM_BASEADDR, 1, mac_hw_info.hw_addr_wlan_exp);
        already_read = 1;
    }

    return mac_hw_info;
}

u32  wlan_platform_userio_get_state(){
    u32 return_value = 0;
    u32 user_io_inputs;

    user_io_inputs = userio_read_inputs(USERIO_BASEADDR);

    if(user_io_inputs & W3_USERIO_PB_U) return_value |= USERIO_INPUT_MASK_PB_0;
    if(user_io_inputs & W3_USERIO_PB_M) return_value |= USERIO_INPUT_MASK_PB_1;
    if(user_io_inputs & W3_USERIO_PB_D) return_value |= USERIO_INPUT_MASK_PB_2;

    if(user_io_inputs & W3_USERIO_DIPSW_0) return_value |= USERIO_INPUT_MASK_SW_0;
    if(user_io_inputs & W3_USERIO_DIPSW_1) return_value |= USERIO_INPUT_MASK_SW_1;
    if(user_io_inputs & W3_USERIO_DIPSW_2) return_value |= USERIO_INPUT_MASK_SW_2;
    if(user_io_inputs & W3_USERIO_DIPSW_3) return_value |= USERIO_INPUT_MASK_SW_3;

    return return_value;
}