PHY component (DM9161A)

Driver for the dm9161a component.

This driver provides access to the main features of the PHY.

Dependencies

This driver depends on the following modules:

• Ethernet Media Access Controller Ethernet Media Access Controller (EMAC) module.

Macros
#define	ETH_PHY_MAX_ADDR   31
#define	ETH_PHY_RETRY_MAX   1000000
#define	ETH_PHY_TIMEOUT   10

Functions
uint8_t	ethernet_phy_auto_negotiate (Emac *p_emac, uint8_t uc_phy_addr)
	Issue an auto negotiation of the PHY. More...
static uint8_t	ethernet_phy_find_valid (Emac *p_emac, uint8_t uc_phy_addr, uint8_t addrStart)
	Find a valid PHY Address ( from addrStart to 31 ). More...
uint8_t	ethernet_phy_init (Emac *p_emac, uint8_t uc_phy_addr, uint32_t mck)
	Perform a HW initialization to the PHY ( via RSTC ) and set up clocks. More...
uint8_t	ethernet_phy_reset (Emac *p_emac, uint8_t uc_phy_addr)
	Issue a SW reset to reset all registers of the PHY. More...
uint8_t	ethernet_phy_set_link (Emac *p_emac, uint8_t uc_phy_addr, uint8_t uc_apply_setting_flag)
	Get the Link & speed settings, and automatically set up the EMAC with the settings. More...

#define ETH_PHY_MAX_ADDR   31

Referenced by ethernet_phy_find_valid().

#define ETH_PHY_RETRY_MAX   1000000

Referenced by ethernet_phy_auto_negotiate().

#define ETH_PHY_TIMEOUT   10

Referenced by ethernet_phy_reset().

uint8_t ethernet_phy_auto_negotiate	(	Emac *	p_emac,
		uint8_t	uc_phy_addr
	)

Issue an auto negotiation of the PHY.

Parameters

p_emac	Pointer to the EMAC instance.
uc_phy_addr	PHY address.

Return EMAC_OK if successfully, EMAC_TIMEOUT if timeout.

References emac_enable_full_duplex(), emac_enable_management(), emac_enable_rmii(), emac_enable_transceiver_clock(), EMAC_OK, emac_phy_read(), emac_phy_write(), emac_set_speed(), EMAC_TIMEOUT, ETH_PHY_RETRY_MAX, MII_10_FDX, MII_10_HDX, MII_AN_IEEE_802_3, MII_ANAR, MII_ANLPAR, MII_AUTONEG, MII_AUTONEG_COMP, MII_BMCR, MII_BMSR, MII_DUPLEX_MODE, MII_ISOLATE, MII_LOOPBACK, MII_POWER_DOWN, MII_RESTART_AUTONEG, MII_SPEED_SELECT, MII_TX_FDX, and MII_TX_HDX.

Referenced by low_level_init(), main(), and run_emac_link_test().

static uint8_t ethernet_phy_find_valid ( Emac *  p_emac, uint8_t  uc_phy_addr, uint8_t  addrStart  )

static

Find a valid PHY Address ( from addrStart to 31 ).

Parameters

p_emac	Pointer to the EMAC instance.
uc_phy_addr	PHY address.
uc_start_addr	Start address of the PHY to be searched.

Returns

0xFF when no valid PHY address is found.

References emac_enable_management(), EMAC_OK, emac_phy_read(), ETH_PHY_MAX_ADDR, MII_DSCSR, MII_OUI_MSB, and MII_PHYID1.

Referenced by ethernet_phy_init().

uint8_t ethernet_phy_init	(	Emac *	p_emac,
		uint8_t	uc_phy_addr,
		uint32_t	mck
	)

Perform a HW initialization to the PHY ( via RSTC ) 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 EMAC peripheral pins are configured after the reset is done.

Parameters

p_emac	Pointer to the EMAC instance.
uc_phy_addr	PHY address.
ul_mck	EMAC MCK.

Return EMAC_OK if successfully, EMAC_TIMEOUT if timeout.

References EMAC_OK, emac_set_clock(), EMAC_TIMEOUT, ethernet_phy_find_valid(), and ethernet_phy_reset().

Referenced by low_level_init(), main(), and run_emac_link_test().

uint8_t ethernet_phy_reset	(	Emac *	p_emac,
		uint8_t	uc_phy_addr
	)

Issue a SW reset to reset all registers of the PHY.

Parameters

p_emac	Pointer to the EMAC instance.
uc_phy_addr	PHY address.

EMAC_OK if successfully, EMAC_TIMEOUT if timeout.

References emac_enable_management(), EMAC_OK, emac_phy_read(), emac_phy_write(), EMAC_TIMEOUT, ETH_PHY_TIMEOUT, MII_BMCR, and MII_RESET.

Referenced by ethernet_phy_init().

uint8_t ethernet_phy_set_link	(	Emac *	p_emac,
		uint8_t	uc_phy_addr,
		uint8_t	uc_apply_setting_flag
	)

Get the Link & speed settings, and automatically set up the EMAC with the settings.

Parameters

p_emac	Pointer to the EMAC instance.
uc_phy_addr	PHY address.
uc_apply_setting_flag	Set to 0 to not apply the PHY configurations, else to apply.

Return EMAC_OK if successfully, EMAC_TIMEOUT if timeout.

References emac_enable_full_duplex(), emac_enable_management(), EMAC_INVALID, EMAC_OK, emac_phy_read(), emac_set_speed(), EMAC_TIMEOUT, MII_100BASE_T4_HD, MII_100BASE_TX_FD, MII_100FDX, MII_100HDX, MII_10BASE_T_FD, MII_10BASE_T_HD, MII_10FDX, MII_10HDX, MII_BMSR, MII_DSCSR, and MII_LINK_STATUS.

Referenced by low_level_init(), main(), and run_emac_link_test().