src/vendorcode/cavium/bdk/libbdk-hal/if/bdk-if-phy-marvell.c

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#include <bdk.h>
#include <libbdk-hal/bdk-mdio.h>
#include <libbdk-hal/bdk-qlm.h>
#include <libbdk-hal/if/bdk-if.h>

/**
 * Setup marvell PHYs
 * This function sets up one port in a marvell 88E1512 in SGMII mode
 */
static void setup_marvell_phy(bdk_node_t node, int mdio_bus, int mdio_addr)
{
      int phy_status = 0;

           BDK_TRACE(PHY, "%s In SGMII mode for Marvell PHY 88E1512\n", __func__);
          /* Switch to Page 18 */
            phy_status = bdk_mdio_write(node, mdio_bus, mdio_addr, 22, 18);
          if (phy_status < 0)
                       return;

          phy_status = bdk_mdio_read(node, mdio_bus, mdio_addr, 22);
          if (phy_status < 0)
                       return;

          /* Change the Phy System mode from RGMII(default hw reset mode) to SGMII */
          phy_status = bdk_mdio_write(node, mdio_bus, mdio_addr, 20, 1);
          if (phy_status < 0)
                return;

          /* Requires a Software reset */
          phy_status = bdk_mdio_write(node, mdio_bus, mdio_addr, 20, 0x8001);
          if (phy_status < 0)
                return;

          phy_status = bdk_mdio_read(node, mdio_bus, mdio_addr, 20);
          if (phy_status < 0)
                       return;

          /* Change the Page back to 0 */
            phy_status = bdk_mdio_write(node, mdio_bus, mdio_addr, 22, 0);
          if (phy_status < 0)
                       return;

          phy_status = bdk_mdio_read(node, mdio_bus, mdio_addr, 22);
          if (phy_status < 0)
                       return;

      phy_status = bdk_mdio_read(node, mdio_bus, mdio_addr, 17);
      if (phy_status < 0)
           return;
}

int bdk_if_phy_marvell_setup(bdk_node_t node, int qlm, int mdio_bus, int phy_addr)
{
    BDK_TRACE(PHY,"In %s\n",__func__);

    /* Check if the PHY is marvell PHY we expect */
    int phy_status = bdk_mdio_read(node, mdio_bus, phy_addr, BDK_MDIO_PHY_REG_ID1);
    if (phy_status != 0x0141)
        return 0;

    /* Check that the GSER mode is SGMII */
    /* Switch the marvell PHY to the correct mode */
    bdk_qlm_modes_t qlm_mode = bdk_qlm_get_mode(node, qlm);

    BDK_TRACE(PHY,"%s: QLM:%d QLM_MODE:%d\n",__func__, qlm, qlm_mode);

    if ((qlm_mode != BDK_QLM_MODE_SGMII_1X1) &&
        (qlm_mode != BDK_QLM_MODE_SGMII_2X1))
        return 0;

    BDK_TRACE(PHY,"%s: Detected Marvell Phy in SGMII mode\n", __func__);
    for (int port = 0; port < 2; port++)
    {
        setup_marvell_phy(node, mdio_bus, phy_addr + port);
    }
    return 0;
}