/**
* \brief Perform a HW initialization to the PHY and set up clocks.
*
* This should be called only once to initialize the PHY pre-settings.
* The PHY address is the reset status of CRS, RXD[3:0] (the emacPins' pullups).
* The COL pin is used to select MII mode on reset (pulled up for Reduced MII).
* The RXDV pin is used to select test mode on reset (pulled up for test mode).
* The above pins should be predefined for corresponding settings in resetPins.
* The GMAC peripheral pins are configured after the reset is done.
*
* \param p_gmac Pointer to the GMAC instance.
* \param uc_phy_addr PHY address.
* \param ul_mck GMAC MCK.
*
* Return GMAC_OK if successfully, GMAC_TIMEOUT if timeout.
*/
uint8_t ethernet_phy_init(Gmac *p_gmac, uint8_t uc_phy_addr, uint32_t mck)
{
uint8_t uc_rc;
uint8_t uc_phy;
#if 0 // chrishamm
pio_set_output(PIN_GMAC_RESET_PIO, PIN_GMAC_RESET_MASK, 1, false, true);
pio_set_input(PIN_GMAC_INT_PIO, PIN_GMAC_INT_MASK, PIO_PULLUP);
pio_set_peripheral(PIN_GMAC_PIO, PIN_GMAC_PERIPH, PIN_GMAC_MASK);
#endif
ethernet_phy_reset(GMAC,uc_phy_addr);
/* Configure GMAC runtime clock */
uc_rc = gmac_set_mdc_clock(p_gmac, mck);
if (uc_rc != GMAC_OK) {
return 0;
}
/* Check PHY Address */
uc_phy = ethernet_phy_find_valid(p_gmac, uc_phy_addr, 0);
if (uc_phy == 0xFF) {
return 0;
}
if (uc_phy != uc_phy_addr) {
ethernet_phy_reset(p_gmac, uc_phy_addr);
}
return uc_rc;
}
/**
* \brief Perform a HW initialization to the PHY and set up clocks.
*
* This should be called only once to initialize the PHY pre-settings.
* The PHY address is the reset status of CRS, RXD[3:0] (the emacPins' pullups).
* The COL pin is used to select MII mode on reset (pulled up for Reduced MII).
* The RXDV pin is used to select test mode on reset (pulled up for test mode).
* The above pins should be predefined for corresponding settings in resetPins.
* The GMAC peripheral pins are configured after the reset is done.
*
* \param p_gmac Pointer to the GMAC instance.
* \param uc_phy_addr PHY address.
* \param ul_mck GMAC MCK.
*
* Return GMAC_OK if successfully, GMAC_TIMEOUT if timeout.
*/
uint8_t ethernet_phy_init(Gmac *p_gmac, uint8_t uc_phy_addr, uint32_t mck)
{
uint8_t uc_rc = GMAC_TIMEOUT;
uint8_t uc_phy;
ethernet_phy_reset(GMAC,uc_phy_addr);
/* Configure GMAC runtime clock */
uc_rc = gmac_set_mdc_clock(p_gmac, mck);
if (uc_rc != GMAC_OK) {
return 0;
}
/* Check PHY Address */
uc_phy = ethernet_phy_find_valid(p_gmac, uc_phy_addr, 0);
if (uc_phy == 0xFF) {
return 0;
}
if (uc_phy != uc_phy_addr) {
ethernet_phy_reset(p_gmac, uc_phy_addr);
}
phy_props.phy_chn = uc_phy;
return uc_phy;
}