Marvell 88E1111S initialization: How To

Initializing 88E1111S was a big problem for me, since I could not get the detailed datasheet/user's manual for the same. Once I got the handle it was a simple matter. So, let me explain the steps. This procedure is for 88E1111S with ID of 0x01410cc (88E1111-BAB1 is written on the chip).

First let me define the addresses of the very essential registers for the initialization.

Registers used

Register	Address
#define MIIM_CONTROL	0x00
#define MIIM_STATUS	0x01
#define MIIM_ANAR	0x04
#define MIIM_GBIT_CONTROL	0x09

The initialization code is as follows:

/* Reset the chip */
write_phy_reg(MIIM_CONTROL, 0x9140);
/* Wait for Reset over */
while(read_phy_reg(MIIM_CONTROL) & 0x8000);
/* Marvel 88E1111S sequence */
write_phy_reg(0x1d, 0x1f);
write_phy_reg(0x1e, 0x200c);
write_phy_reg(0x1d, 0x05);
write_phy_reg(0x1e, 0x0);
write_phy_reg(0x1e, 0x100);
/* Enable the 88e1111 internal RX/TX clock delay */
write_phy_reg(0x14, 0x0cd2);
/* Set the Gigabit control register and
   Autonegotiation Advertisement register */
write_phy_reg(MIIM_GBIT_CONTROL, 0xe00);
write_phy_reg(MIIM_ANAR, 0x1e1);
/* Reset Again */
write_phy_reg(MIIM_CONTROL, 0x9140);

/* Check for the link to come up */
while((status = read_phy_reg(MIIM_CONTROL)) & 0x0004);
/* Now, initialization is over. You can parse the status Register to know the Speed and Duplex */

Ping me if you still have problem.