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Add support for the Micrel KSZ8081 ethernet PHY.

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The only thing this phy needs that the ukphy driver doesn't provide is
that the value in the proprietary Phy Control 2 Register must be saved
before doing a soft reset and restored afterwards.  Most modern phys have
"sticky bits" for low-level config that survive a reset, but on this one
the values in all registers go back to defaults, wiping out any board-
specific config set up by the bootloader/bios/whatever.
This commit is contained in:
Ian Lepore 2017-04-16 01:40:17 +00:00
parent ea5e026a0d
commit e8b1516a8b
2 changed files with 28 additions and 1 deletions
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28
sys/dev/mii/micphy.c
View File

@ -76,10 +76,13 @@ __FBSDID("$FreeBSD$");
#define MII_KSZ9031_TX_DATA_PAD_SKEW 0x6
#define MII_KSZ9031_CLOCK_PAD_SKEW 0x8
#define MII_KSZ8081_PHYCTL2 0x1f
#define PS_TO_REG(p) ((p) / 200)
static int micphy_probe(device_t);
static int micphy_attach(device_t);
static void micphy_reset(struct mii_softc *);
static int micphy_service(struct mii_softc *, struct mii_data *, int);
static device_method_t micphy_methods[] = {
@ -102,6 +105,7 @@ static driver_t micphy_driver = {
DRIVER_MODULE(micphy, miibus, micphy_driver, micphy_devclass, 0, 0);
static const struct mii_phydesc micphys[] = {
MII_PHY_DESC(MICREL, KSZ8081),
MII_PHY_DESC(MICREL, KSZ9021),
MII_PHY_DESC(MICREL, KSZ9031),
MII_PHY_END
@ -110,7 +114,7 @@ static const struct mii_phydesc micphys[] = {
static const struct mii_phy_funcs micphy_funcs = {
micphy_service,
ukphy_status,
mii_phy_reset
micphy_reset
};
static uint32_t
@ -257,6 +261,10 @@ micphy_attach(device_t dev)
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &micphy_funcs, 1);
mii_phy_setmedia(sc);
/* Nothing further to configure for 8081 model. */
if (sc->mii_mpd_model == MII_MODEL_MICREL_KSZ8081)
return (0);
miibus = device_get_parent(dev);
parent = device_get_parent(miibus);
@ -271,6 +279,24 @@ micphy_attach(device_t dev)
return (0);
}
static void
micphy_reset(struct mii_softc *sc)
{
int reg;
/*
* The 8081 has no "sticky bits" that survive a soft reset; several bits
* in the Phy Control Register 2 must be preserved across the reset.
* These bits are set up by the bootloader; they control how the phy
* interfaces to the board (such as clock frequency and LED behavior).
*/
if (sc->mii_mpd_model == MII_MODEL_MICREL_KSZ8081)
reg = PHY_READ(sc, MII_KSZ8081_PHYCTL2);
mii_phy_reset(sc);
if (sc->mii_mpd_model == MII_MODEL_MICREL_KSZ8081)
PHY_WRITE(sc, MII_KSZ8081_PHYCTL2, reg);
}
static int
micphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{

1
sys/dev/mii/miidevs
View File

@ -282,6 +282,7 @@ model MARVELL E1000_5 0x0005 Marvell 88E1000 Gigabit PHY
model MARVELL E1111 0x000c Marvell 88E1111 Gigabit PHY
/* Micrel PHYs */
model MICREL KSZ8081 0x0016 Micrel KSZ8081 10/100 PHY
model MICREL KSZ9021 0x0021 Micrel KSZ9021 10/100/1000 PHY
model MICREL KSZ9031 0x0022 Micrel KSZ9031 10/100/1000 PHY