/*
* Generic PHY Management code
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
+ * SPDX-License-Identifier: GPL-2.0+
*
* Copyright 2011 Freescale Semiconductor, Inc.
* author Andy Fleming
#include <miiphy.h>
#include <phy.h>
#include <errno.h>
+#include <linux/err.h>
/* Generic PHY support and helper functions */
* what is supported. Returns < 0 on error, 0 if the PHY's advertisement
* hasn't changed, and > 0 if it has changed.
*/
-int genphy_config_advert(struct phy_device *phydev)
+static int genphy_config_advert(struct phy_device *phydev)
{
u32 advertise;
int oldadv, adv;
adv |= ADVERTISE_PAUSE_CAP;
if (advertise & ADVERTISED_Asym_Pause)
adv |= ADVERTISE_PAUSE_ASYM;
+ if (advertise & ADVERTISED_1000baseX_Half)
+ adv |= ADVERTISE_1000XHALF;
+ if (advertise & ADVERTISED_1000baseX_Full)
+ adv |= ADVERTISE_1000XFULL;
if (adv != oldadv) {
err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
* Description: Configures MII_BMCR to force speed/duplex
* to the values in phydev. Assumes that the values are valid.
*/
-int genphy_setup_forced(struct phy_device *phydev)
+static int genphy_setup_forced(struct phy_device *phydev)
{
- int err;
int ctl = 0;
phydev->pause = phydev->asym_pause = 0;
if (DUPLEX_FULL == phydev->duplex)
ctl |= BMCR_FULLDPLX;
- err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
-
- return err;
+ return phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
}
/* Don't isolate the PHY if we're negotiating */
ctl &= ~(BMCR_ISOLATE);
- ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
-
- return ctl;
+ return phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
}
*/
int genphy_update_link(struct phy_device *phydev)
{
- unsigned int mii_reg;
+ int mii_reg;
+ int bmcr;
/*
* Wait if the link is up, and autonegotiation is in progress
* (ie - we're capable and it's not done)
*/
mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+ if (mii_reg < 0)
+ return mii_reg;
/*
* If we already saw the link up, and it hasn't gone down, then
if (phydev->link && mii_reg & BMSR_LSTATUS)
return 0;
+ bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+ if (bmcr < 0)
+ return bmcr;
+
+ if (!(bmcr & BMCR_ANENABLE))
+ return 0;
+
if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
int i = 0;
udelay(1000); /* 1 ms */
mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+ if (mii_reg < 0)
+ return mii_reg;
}
printf(" done\n");
phydev->link = 1;
} else {
/* Read the link a second time to clear the latched state */
mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+ if (mii_reg < 0)
+ return mii_reg;
if (mii_reg & BMSR_LSTATUS)
phydev->link = 1;
*
* Stolen from Linux's mii.c and phy_device.c
*/
-static int genphy_parse_link(struct phy_device *phydev)
+int genphy_parse_link(struct phy_device *phydev)
{
int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+ if (mii_reg < 0)
+ return mii_reg;
+
/* We're using autonegotiation */
if (mii_reg & BMSR_ANEGCAPABLE) {
- u32 lpa = 0;
- u32 gblpa = 0;
+ int ret;
+ u16 lpa;
+ u16 gblpa = 0;
+ int estatus = 0;
/* Check for gigabit capability */
if (mii_reg & BMSR_ERCAP) {
/* We want a list of states supported by
* both PHYs in the link
*/
- gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
- gblpa &= phy_read(phydev,
- MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
+ ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
+ if (ret < 0)
+ return ret;
+ gblpa = ret;
+
+ ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
+ if (ret < 0)
+ return ret;
+ gblpa &= ret << 2;
}
/* Set the baseline so we only have to set them
return 0;
}
- lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
- lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
+ ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
+ if (ret < 0)
+ return ret;
+ lpa = ret;
+
+ ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
+ if (ret < 0)
+ return ret;
+ lpa &= ret;
if (lpa & (LPA_100FULL | LPA_100HALF)) {
phydev->speed = SPEED_100;
} else if (lpa & LPA_10FULL)
phydev->duplex = DUPLEX_FULL;
+
+ /*
+ * Extended status may indicate that the PHY supports
+ * 1000BASE-T/X even though the 1000BASE-T registers
+ * are missing. In this case we can't tell whether the
+ * peer also supports it, so we only check extended
+ * status if the 1000BASE-T registers are actually
+ * missing.
+ */
+ if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
+ estatus = phy_read(phydev, MDIO_DEVAD_NONE,
+ MII_ESTATUS);
+ if (estatus < 0)
+ return estatus;
+
+ if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
+ ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
+ phydev->speed = SPEED_1000;
+ if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
+ phydev->duplex = DUPLEX_FULL;
+ }
+
} else {
- u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+ int bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+
+ if (bmcr < 0)
+ return bmcr;
phydev->speed = SPEED_10;
phydev->duplex = DUPLEX_HALF;
features |= SUPPORTED_1000baseT_Full;
if (val & ESTATUS_1000_THALF)
features |= SUPPORTED_1000baseT_Half;
+ if (val & ESTATUS_1000_XFULL)
+ features |= SUPPORTED_1000baseX_Full;
+ if (val & ESTATUS_1000_XHALF)
+ features |= SUPPORTED_1000baseX_Half;
}
phydev->supported = features;
#ifdef CONFIG_PHY_DAVICOM
phy_davicom_init();
#endif
+#ifdef CONFIG_PHY_ET1011C
+ phy_et1011c_init();
+#endif
+#ifdef CONFIG_PHY_ICPLUS
+ phy_icplus_init();
+#endif
#ifdef CONFIG_PHY_LXT
phy_lxt_init();
#endif
return 0;
}
-int phy_probe(struct phy_device *phydev)
+static int phy_probe(struct phy_device *phydev)
{
int err = 0;
return &genphy_driver;
}
-struct phy_driver *get_phy_driver(struct phy_device *phydev,
+static struct phy_driver *get_phy_driver(struct phy_device *phydev,
phy_interface_t interface)
{
struct list_head *entry;
return generic_for_interface(interface);
}
-struct phy_device *phy_device_create(struct mii_dev *bus, int addr, int phy_id,
- phy_interface_t interface)
+static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
+ int phy_id,
+ phy_interface_t interface)
{
struct phy_device *dev;
* Description: Reads the ID registers of the PHY at @addr on the
* @bus, stores it in @phy_id and returns zero on success.
*/
-int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
+static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
{
int phy_reg;
return 0;
}
-/**
- * get_phy_device - reads the specified PHY device and returns its @phy_device struct
- * @bus: the target MII bus
- * @addr: PHY address on the MII bus
- *
- * Description: Reads the ID registers of the PHY at @addr on the
- * @bus, then allocates and returns the phy_device to represent it.
- */
-struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
- phy_interface_t interface)
+static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
+ unsigned phy_mask, int devad, phy_interface_t interface)
{
- u32 phy_id = 0x1fffffff;
- int i;
- int r;
+ u32 phy_id = 0xffffffff;
+ while (phy_mask) {
+ int addr = ffs(phy_mask) - 1;
+ int r = get_phy_id(bus, addr, devad, &phy_id);
+ if (r < 0)
+ return ERR_PTR(r);
+ /* If the PHY ID is mostly f's, we didn't find anything */
+ if ((phy_id & 0x1fffffff) != 0x1fffffff)
+ return phy_device_create(bus, addr, phy_id, interface);
+ phy_mask &= ~(1 << addr);
+ }
+ return NULL;
+}
+static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
+ unsigned phy_mask, phy_interface_t interface)
+{
/* If we have one, return the existing device, with new interface */
- if (bus->phymap[addr]) {
- bus->phymap[addr]->interface = interface;
-
- return bus->phymap[addr];
+ while (phy_mask) {
+ int addr = ffs(phy_mask) - 1;
+ if (bus->phymap[addr]) {
+ bus->phymap[addr]->interface = interface;
+ return bus->phymap[addr];
+ }
+ phy_mask &= ~(1 << addr);
}
+ return NULL;
+}
- /* Try Standard (ie Clause 22) access */
- r = get_phy_id(bus, addr, MDIO_DEVAD_NONE, &phy_id);
- if (r)
- return NULL;
-
- /* If the PHY ID is mostly f's, we didn't find anything */
- if ((phy_id & 0x1fffffff) != 0x1fffffff)
- return phy_device_create(bus, addr, phy_id, interface);
+static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
+ unsigned phy_mask, phy_interface_t interface)
+{
+ int i;
+ struct phy_device *phydev;
+ phydev = search_for_existing_phy(bus, phy_mask, interface);
+ if (phydev)
+ return phydev;
+ /* Try Standard (ie Clause 22) access */
/* Otherwise we have to try Clause 45 */
- for (i = 1; i < 5; i++) {
- r = get_phy_id(bus, addr, i, &phy_id);
- if (r)
+ for (i = 0; i < 5; i++) {
+ phydev = create_phy_by_mask(bus, phy_mask,
+ i ? i : MDIO_DEVAD_NONE, interface);
+ if (IS_ERR(phydev))
return NULL;
-
- /* If the phy_id is mostly Fs, there is no device there */
- if ((phy_id & 0x1fffffff) != 0x1fffffff)
- break;
+ if (phydev)
+ return phydev;
}
+ printf("Phy not found\n");
+ return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
+}
- return phy_device_create(bus, addr, phy_id, interface);
+/**
+ * get_phy_device - reads the specified PHY device and returns its @phy_device struct
+ * @bus: the target MII bus
+ * @addr: PHY address on the MII bus
+ *
+ * Description: Reads the ID registers of the PHY at @addr on the
+ * @bus, then allocates and returns the phy_device to represent it.
+ */
+static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
+ phy_interface_t interface)
+{
+ return get_phy_device_by_mask(bus, 1 << addr, interface);
}
int phy_reset(struct phy_device *phydev)
{
+ int err;
int reg;
int timeout = 500;
int devad = MDIO_DEVAD_NONE;
reg |= BMCR_RESET;
- if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
+ err = phy_write(phydev, devad, MII_BMCR, reg);
+ if (err < 0) {
debug("PHY reset failed\n");
- return -1;
+ return err;
}
#ifdef CONFIG_PHY_RESET_DELAY
* auto-clearing). This should happen within 0.5 seconds per the
* IEEE spec.
*/
- while ((reg & BMCR_RESET) && timeout--) {
+ while ((reg & BMCR_RESET) && timeout-- >= 0) {
reg = phy_read(phydev, devad, MII_BMCR);
if (reg < 0) {
debug("PHY status read failed\n");
- return -1;
+ return reg;
}
udelay(1000);
}
if (reg & BMCR_RESET) {
puts("PHY reset timed out\n");
- return -1;
+ return -ETIMEDOUT;
}
return 0;
return phy_reset(phydev);
}
-struct phy_device *phy_connect(struct mii_dev *bus, int addr,
- struct eth_device *dev,
- phy_interface_t interface)
+struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
+ phy_interface_t interface)
{
- struct phy_device *phydev;
-
/* Reset the bus */
if (bus->reset)
bus->reset(bus);
/* Wait 15ms to make sure the PHY has come out of hard reset */
udelay(15000);
+ return get_phy_device_by_mask(bus, phy_mask, interface);
+}
- phydev = get_phy_device(bus, addr, interface);
-
- if (!phydev) {
- printf("Could not get PHY for %s:%d\n", bus->name, addr);
-
- return NULL;
- }
-
+void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
+{
/* Soft Reset the PHY */
phy_reset(phydev);
-
- if (phydev->dev)
+ if (phydev->dev) {
printf("%s:%d is connected to %s. Reconnecting to %s\n",
- bus->name, addr, phydev->dev->name, dev->name);
-
+ phydev->bus->name, phydev->addr,
+ phydev->dev->name, dev->name);
+ }
phydev->dev = dev;
-
debug("%s connected to %s\n", dev->name, phydev->drv->name);
+}
+
+struct phy_device *phy_connect(struct mii_dev *bus, int addr,
+ struct eth_device *dev, phy_interface_t interface)
+{
+ struct phy_device *phydev;
+ phydev = phy_find_by_mask(bus, 1 << addr, interface);
+ if (phydev)
+ phy_connect_dev(phydev, dev);
+ else
+ printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
return phydev;
}
projects / karo-tx-uboot.git / blobdiff