2 * Generic PHY Management code
4 * SPDX-License-Identifier: GPL-2.0+
6 * Copyright 2011 Freescale Semiconductor, Inc.
9 * Based loosely off of Linux's PHY Lib
17 int gen10g_shutdown(struct phy_device *phydev)
22 int gen10g_startup(struct phy_device *phydev)
25 u32 mmd_mask = phydev->mmds & MDIO_DEVS_LINK;
29 /* For now just lie and say it's 10G all the time */
30 phydev->speed = SPEED_10000;
31 phydev->duplex = DUPLEX_FULL;
34 * Go through all the link-reporting devices, and make sure
35 * they're all up and happy
37 for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) {
41 /* Read twice because link state is latched and a
42 * read moves the current state into the register */
43 phy_read(phydev, devad, MDIO_STAT1);
44 reg = phy_read(phydev, devad, MDIO_STAT1);
45 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
52 int gen10g_discover_mmds(struct phy_device *phydev)
54 int mmd, stat2, devs1, devs2;
56 /* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
57 * XS or DTE XS; give up if none is present. */
58 for (mmd = 1; mmd <= 5; mmd++) {
59 /* Is this MMD present? */
60 stat2 = phy_read(phydev, mmd, MDIO_STAT2);
62 (stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
65 /* It should tell us about all the other MMDs */
66 devs1 = phy_read(phydev, mmd, MDIO_DEVS1);
67 devs2 = phy_read(phydev, mmd, MDIO_DEVS2);
68 if (devs1 < 0 || devs2 < 0)
71 phydev->mmds = devs1 | (devs2 << 16);
78 int gen10g_config(struct phy_device *phydev)
80 /* For now, assume 10000baseT. Fill in later */
81 phydev->supported = phydev->advertising = SUPPORTED_10000baseT_Full;
83 return gen10g_discover_mmds(phydev);
86 struct phy_driver gen10g_driver = {
89 .name = "Generic 10G PHY",
91 .config = gen10g_config,
92 .startup = gen10g_startup,
93 .shutdown = gen10g_shutdown,