/*
 * Copyright (c) 2024 HPMicro
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */

/*---------------------------------------------------------------------
 * Includes
 *---------------------------------------------------------------------
 */
#include "hpm_enet_drv.h"
#include "hpm_lan8720_regs.h"
#include "hpm_lan8720.h"

/*---------------------------------------------------------------------
 * Internal API
 *---------------------------------------------------------------------
 */
static bool lan8720_check_id(ENET_Type *ptr)
{
    uint16_t id1, id2;

    id1 = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_PHYID1);
    id2 = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_PHYID2);

    if (LAN8720_PHYID1_OUI_MSB_GET(id1) == LAN8720_ID1 && LAN8720_PHYID2_OUI_LSB_GET(id2) == LAN8720_ID2) {
        return true;
    } else {
        return false;
    }
}

/*---------------------------------------------------------------------
 * API
 *---------------------------------------------------------------------
 */
void lan8720_reset(ENET_Type *ptr)
{
    uint16_t data;

    /* PHY reset */
    enet_write_phy(ptr, LAN8720_ADDR, LAN8720_BMCR, LAN8720_BMCR_RESET_SET(1));

    /* wait until the reset is completed */
    do {
        data = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_BMCR);
    } while (LAN8720_BMCR_RESET_GET(data));
}

void lan8720_basic_mode_default_config(ENET_Type *ptr, lan8720_config_t *config)
{
    config->loopback         = false;                        /* Disable PCS loopback mode */
    #if defined(__DISABLE_AUTO_NEGO) && __DISABLE_AUTO_NEGO
    config->auto_negotiation = false;                        /* Disable Auto-Negotiation */
    config->speed            = enet_phy_port_speed_100mbps;
    config->duplex           = enet_phy_duplex_full;
    #else
    config->auto_negotiation = true;                         /* Enable Auto-Negotiation */
    #endif
}

bool lan8720_basic_mode_init(ENET_Type *ptr, lan8720_config_t *config)
{
    uint16_t data = 0;

    data |= LAN8720_BMCR_RESET_SET(0)                        /* Normal operation */
         |  LAN8720_BMCR_LOOPBACK_SET(config->loopback)      /* configure PCS loopback mode */
         |  LAN8720_BMCR_ANE_SET(config->auto_negotiation)   /* configure Auto-Negotiation */
         |  LAN8720_BMCR_PWD_SET(0)                          /* Normal operation */
         |  LAN8720_BMCR_ISOLATE_SET(0)                      /* Normal operation */
         |  LAN8720_BMCR_RESTART_AN_SET(0);                  /* Normal operation (ignored when Auto-Negotiation is disabled) */

    if (config->auto_negotiation == 0) {
        data |= LAN8720_BMCR_SPEED_SET(config->speed);      /* Set port speed */
        data |= LAN8720_BMCR_DUPLEX_SET(config->duplex);     /* Set duplex mode */
    }

    /* check the id of lan8720 */
    if (lan8720_check_id(ptr) == false) {
        return false;
    }

    enet_write_phy(ptr, LAN8720_ADDR, LAN8720_BMCR, data);

    return true;
}

void lan8720_get_phy_status(ENET_Type *ptr, enet_phy_status_t *status)
{
    uint16_t data;

    data = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_BMSR);
    status->enet_phy_link = LAN8720_BMSR_LINK_STATUS_GET(data);

    data = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_PSCSR);
    status->enet_phy_speed = LAN8720_PSCSR_SPEED_GET(data) == 1 ? enet_phy_port_speed_10mbps : enet_phy_port_speed_100mbps;
    status->enet_phy_duplex = LAN8720_PSCSR_DUPLEX_GET(data);
}