u-boot.git/drivers/net/phy/phy.c, branch v2019.10

drivers: net: phy: Ignore PHY ID 0 during PHY probing

2019-07-18T21:37:13+00:00

Current code fails to probe some C45 PHYs that also respond to C22 reads.
This is the case for PHYs like Aquantia AQR112, Marvell 88X2242 (as
previously posted on the u-boot list).
If the PHY ID reads all 0s just ignore it and try the next devad.

Signed-off-by: Alex Marginean 
Reviewed-By: Ramon Fried 
Reviewed-by: Bin Meng 
Acked-by: Joe Hershberger

net: phy: Fix return value check phy_probe

2019-05-08T22:27:00+00:00

Don't ignore return value of phy_probe() call as
the probe may fail and it needs to be reported.

Signed-off-by: Siva Durga Prasad Paladugu 
Signed-off-by: Michal Simek 
Acked-by: Joe Hershberger

net: phy: Reloc next and prev pointers inside phy_drivers

2019-05-08T22:27:00+00:00

This patch relocates the pointers inside phy_drivers incase
of manual reloc. Without this reloc, these points to invalid
pre relocation address and hence causes exception or hang.

Signed-off-by: Siva Durga Prasad Paladugu 
Signed-off-by: Michal Simek 
Acked-by: Joe Hershberger

net: phy: Add generic helpers to access MMD PHY registers

2019-05-07T19:51:55+00:00

Two new helper functions (phy_read_mmd() and phy_write_mmd()) are added
to allow access to the MMD PHY registers.

The MMD PHY registers can be accessed by several means:

1. Using two new MMD access function hooks in the PHY driver. These
functions can be implemented when the PHY driver does not support the
standard IEEE Compatible clause 45 access mechanism described in clause
22 or if the PHY uses its own non-standard access mechanism.

2. Direct access for C45 PHYs and C22 PHYs when accessing the reachable
DEVADs.

3. The standard clause 45 access extensions to the MMD registers through
the indirection registers (clause 22) in all the other cases.

Signed-off-by: Carlo Caione 
Acked-by: Joe Hershberger

net: phy: implement fallback mechanism for negative phy adresses

2019-04-08T00:31:16+00:00

Negative phy-addresses can occour if the caller function was not able to
determine a valid phy address (from device-tree for example). In this
case we catch this here and search for ANY phy device on the given mdio-
bus.

Signed-off-by: Hannes Schmelzer 
Tested-by: Michal Simek 
Tested-by: Lukasz Majewski

Merge branch 'master' of git://git.denx.de/u-boot-net

2019-01-24T20:30:06+00:00

net: phy: Add clause 45 identifier to phy_device

2019-01-24T17:35:26+00:00

The phy devices can be accessed via clause 22 or via clause 45.
This information can be deduced when we read phy id. if the phy id
is read without giving any MDIO Manageable Device Address (MMD), then
it conforms to clause 22. otherwise it conforms to clause 45.

Signed-off-by: Pankaj Bansal 
Acked-by: Joe Hershberger

net: phy: Move fixed link code to separate routine

2019-01-24T09:03:43+00:00

This patch moves fixed-link functionality code to a separate
routine inorder to make it more modular and cleaner.

Signed-off-by: Siva Durga Prasad Paladugu 
Signed-off-by: Michal Simek 
Acked-by: Joe Hershberger

phy: Fix u-boot coruption when fixed-phy is used

2018-12-27T02:35:52+00:00

When fixed-link phy is used subnode offset is used as phy address. This
number is bigger then space allocated for bus structure (allocated via
mdio_alloc).
bus->phymap[] array has PHY_MAX_ADDR size (32).
That's why writing bus->phymap[addr] where addr is < 0 or > PHY_MAX_ADDR
is causing write to memory which can caused full U-Boot crash.

The patch is checking if address is in correct range.

Signed-off-by: Michal Simek

net: phy: add ofnode node to struct phy_device

2018-07-26T19:08:22+00:00

Now the UCLASS_ETH device "node" field is owerwritten by some network drivers in
case of Ethernet PHYs which are linked to UCLASS_ETH device using
"phy-handle" DT property and when Ethernet PHY driver needs to read some
additional information from DT. In such cases following happens (in
general):

- network drivers
	priv->phydev = phy_connect(priv->bus, priv->phyaddr, dev,
				   priv->interface);
	<-- phydev is connected to dev which is UCLASS_ETH device

	if (priv->phy_of_handle > 0)
		dev_set_of_offset(priv->phydev->dev, priv->phy_of_handle);
	<-- phydev->dev->node is overwritten by phy-handle DT node

- PHY driver in .config() callback
	int node = dev_of_offset(dev);
	<-- PHY driver uses overwritten dev->node
        const void *fdt = gd->fdt_blob;

	 if (fdtdec_get_bool(fdt, node, "property"))
		...

As result, UCLASS_ETH device can't be used any more for DT accessing.

This patch adds additional ofnode node field to struct phy_device which can
be set explicitly by network drivers and used by PHY drivers, so
overwriting can be avoided. Also add helper function phy_get_ofnode()
which will check and return phy_device->node or dev_ofnode(phydev->dev) for
backward compatibility with existing drivers.

Signed-off-by: Grygorii Strashko 
Acked-by: Joe Hershberger