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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2019
* Alex Marginean, NXP
*/
#include <common.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <miiphy.h>
#include <dm/device-internal.h>
#include <dm/device_compat.h>
#include <dm/uclass-internal.h>
#include <linux/compat.h>
/* DT node properties for MAC-PHY interface */
#define PHY_MODE_STR_CNT 2
static const char *phy_mode_str[PHY_MODE_STR_CNT] = { "phy-mode",
"phy-connection-type" };
/* DT node properties that reference a PHY node */
#define PHY_HANDLE_STR_CNT 3
const char *phy_handle_str[PHY_HANDLE_STR_CNT] = { "phy-handle",
"phy",
"phy-device" };
void dm_mdio_probe_devices(void)
{
struct udevice *it;
struct uclass *uc;
uclass_get(UCLASS_MDIO, &uc);
uclass_foreach_dev(it, uc) {
device_probe(it);
}
}
static int dm_mdio_post_bind(struct udevice *dev)
{
const char *dt_name;
/* set a custom name for the MDIO device, if present in DT */
if (dev_has_ofnode(dev)) {
dt_name = dev_read_string(dev, "device-name");
if (dt_name) {
debug("renaming dev %s to %s\n", dev->name, dt_name);
device_set_name(dev, dt_name);
}
}
/*
* MDIO command doesn't like spaces in names, don't allow them to keep
* it happy
*/
if (strchr(dev->name, ' ')) {
debug("\nError: MDIO device name \"%s\" has a space!\n",
dev->name);
return -EINVAL;
}
return 0;
}
/*
* Following read/write/reset functions are registered with legacy MII code.
* These are called for PHY operations by upper layers and we further call the
* DM MDIO driver functions.
*/
static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
{
struct udevice *dev = mii_bus->priv;
return mdio_get_ops(dev)->read(dev, addr, devad, reg);
}
static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
u16 val)
{
struct udevice *dev = mii_bus->priv;
return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
}
static int mdio_reset(struct mii_dev *mii_bus)
{
struct udevice *dev = mii_bus->priv;
if (mdio_get_ops(dev)->reset)
return mdio_get_ops(dev)->reset(dev);
else
return 0;
}
static int dm_mdio_post_probe(struct udevice *dev)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
pdata->mii_bus = mdio_alloc();
pdata->mii_bus->read = mdio_read;
pdata->mii_bus->write = mdio_write;
pdata->mii_bus->reset = mdio_reset;
pdata->mii_bus->priv = dev;
strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN - 1);
return mdio_register(pdata->mii_bus);
}
static int dm_mdio_pre_remove(struct udevice *dev)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
struct mdio_ops *ops = mdio_get_ops(dev);
if (ops->reset)
ops->reset(dev);
mdio_unregister(pdata->mii_bus);
mdio_free(pdata->mii_bus);
return 0;
}
struct phy_device *dm_mdio_phy_connect(struct udevice *mdiodev, int phyaddr,
struct udevice *ethdev,
phy_interface_t interface)
{
struct mdio_perdev_priv *pdata = dev_get_uclass_priv(mdiodev);
if (device_probe(mdiodev))
return NULL;
return phy_connect(pdata->mii_bus, phyaddr, ethdev, interface);
}
static struct phy_device *dm_eth_connect_phy_handle(struct udevice *ethdev,
phy_interface_t interface)
{
u32 phy_addr;
struct udevice *mdiodev;
struct phy_device *phy;
struct ofnode_phandle_args phandle = {.node = ofnode_null()};
int i;
for (i = 0; i < PHY_HANDLE_STR_CNT; i++)
if (!dev_read_phandle_with_args(ethdev, phy_handle_str[i], NULL,
0, 0, &phandle))
break;
if (!ofnode_valid(phandle.node)) {
dev_dbg(ethdev, "can't find PHY node\n");
return NULL;
}
/*
* reading 'reg' directly should be fine. This is a PHY node, the
* address is always size 1 and requires no translation
*/
if (ofnode_read_u32(phandle.node, "reg", &phy_addr)) {
dev_dbg(ethdev, "missing reg property in phy node\n");
return NULL;
}
if (uclass_get_device_by_ofnode(UCLASS_MDIO,
ofnode_get_parent(phandle.node),
&mdiodev)) {
dev_dbg(ethdev, "can't find MDIO bus for node %s\n",
ofnode_get_name(ofnode_get_parent(phandle.node)));
return NULL;
}
phy = dm_mdio_phy_connect(mdiodev, phy_addr, ethdev, interface);
if (phy)
phy->node = phandle.node;
return phy;
}
/* Connect to a PHY linked in eth DT node */
struct phy_device *dm_eth_phy_connect(struct udevice *ethdev)
{
const char *if_str;
phy_interface_t interface;
struct phy_device *phy;
int i;
if (!dev_has_ofnode(ethdev)) {
debug("%s: supplied eth dev has no DT node!\n", ethdev->name);
return NULL;
}
interface = PHY_INTERFACE_MODE_NONE;
for (i = 0; i < PHY_MODE_STR_CNT; i++) {
if_str = dev_read_string(ethdev, phy_mode_str[i]);
if (if_str) {
interface = phy_get_interface_by_name(if_str);
break;
}
}
if (interface < 0)
interface = PHY_INTERFACE_MODE_NONE;
if (interface == PHY_INTERFACE_MODE_NONE)
dev_dbg(ethdev, "can't find interface mode, default to NONE\n");
phy = dm_eth_connect_phy_handle(ethdev, interface);
if (!phy)
return NULL;
phy->interface = interface;
return phy;
}
UCLASS_DRIVER(mdio) = {
.id = UCLASS_MDIO,
.name = "mdio",
.post_bind = dm_mdio_post_bind,
.post_probe = dm_mdio_post_probe,
.pre_remove = dm_mdio_pre_remove,
.per_device_auto = sizeof(struct mdio_perdev_priv),
};
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