Commit 04e37d92 authored by Tobias Waldekranz's avatar Tobias Waldekranz Committed by David S. Miller

net: phy: add marvell usb to mdio controller

An MDIO controller present on development boards for Marvell switches
from the Link Street (88E6xxx) family.

Using this module, you can use the following setup as a development
platform for switchdev and DSA related work.

   .-------.      .-----------------.
   |      USB----USB                |
   |  SoC  |      |  88E6390X-DB  ETH1-10
   |      ETH----ETH0               |
   '-------'      '-----------------'
Signed-off-by: default avatarTobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 61e0150c
...@@ -10110,6 +10110,7 @@ MARVELL USB MDIO CONTROLLER DRIVER ...@@ -10110,6 +10110,7 @@ MARVELL USB MDIO CONTROLLER DRIVER
M: Tobias Waldekranz <tobias@waldekranz.com> M: Tobias Waldekranz <tobias@waldekranz.com>
L: netdev@vger.kernel.org L: netdev@vger.kernel.org
S: Maintained S: Maintained
F: drivers/net/phy/mdio-mvusb.c
F: Documentation/devicetree/bindings/net/marvell,mvusb.yaml F: Documentation/devicetree/bindings/net/marvell,mvusb.yaml
MARVELL XENON MMC/SD/SDIO HOST CONTROLLER DRIVER MARVELL XENON MMC/SD/SDIO HOST CONTROLLER DRIVER
......
...@@ -179,6 +179,13 @@ config MDIO_MSCC_MIIM ...@@ -179,6 +179,13 @@ config MDIO_MSCC_MIIM
This driver supports the MIIM (MDIO) interface found in the network This driver supports the MIIM (MDIO) interface found in the network
switches of the Microsemi SoCs switches of the Microsemi SoCs
config MDIO_MVUSB
tristate "Marvell USB to MDIO Adapter"
depends on USB
help
A USB to MDIO converter present on development boards for
Marvell's Link Street family of Ethernet switches.
config MDIO_OCTEON config MDIO_OCTEON
tristate "Octeon and some ThunderX SOCs MDIO buses" tristate "Octeon and some ThunderX SOCs MDIO buses"
depends on (64BIT && OF_MDIO) || COMPILE_TEST depends on (64BIT && OF_MDIO) || COMPILE_TEST
......
...@@ -40,6 +40,7 @@ obj-$(CONFIG_MDIO_I2C) += mdio-i2c.o ...@@ -40,6 +40,7 @@ obj-$(CONFIG_MDIO_I2C) += mdio-i2c.o
obj-$(CONFIG_MDIO_IPQ8064) += mdio-ipq8064.o obj-$(CONFIG_MDIO_IPQ8064) += mdio-ipq8064.o
obj-$(CONFIG_MDIO_MOXART) += mdio-moxart.o obj-$(CONFIG_MDIO_MOXART) += mdio-moxart.o
obj-$(CONFIG_MDIO_MSCC_MIIM) += mdio-mscc-miim.o obj-$(CONFIG_MDIO_MSCC_MIIM) += mdio-mscc-miim.o
obj-$(CONFIG_MDIO_MVUSB) += mdio-mvusb.o
obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o
obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o
obj-$(CONFIG_MDIO_THUNDER) += mdio-thunder.o obj-$(CONFIG_MDIO_THUNDER) += mdio-thunder.o
......
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/usb.h>
#define USB_MARVELL_VID 0x1286
static const struct usb_device_id mvusb_mdio_table[] = {
{ USB_DEVICE(USB_MARVELL_VID, 0x1fa4) },
{}
};
MODULE_DEVICE_TABLE(usb, mvusb_mdio_table);
enum {
MVUSB_CMD_PREAMBLE0,
MVUSB_CMD_PREAMBLE1,
MVUSB_CMD_ADDR,
MVUSB_CMD_VAL,
};
struct mvusb_mdio {
struct usb_device *udev;
struct mii_bus *mdio;
__le16 buf[4];
};
static int mvusb_mdio_read(struct mii_bus *mdio, int dev, int reg)
{
struct mvusb_mdio *mvusb = mdio->priv;
int err, alen;
if (dev & MII_ADDR_C45)
return -EOPNOTSUPP;
mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0xa400 | (dev << 5) | reg);
err = usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),
mvusb->buf, 6, &alen, 100);
if (err)
return err;
err = usb_bulk_msg(mvusb->udev, usb_rcvbulkpipe(mvusb->udev, 6),
&mvusb->buf[MVUSB_CMD_VAL], 2, &alen, 100);
if (err)
return err;
return le16_to_cpu(mvusb->buf[MVUSB_CMD_VAL]);
}
static int mvusb_mdio_write(struct mii_bus *mdio, int dev, int reg, u16 val)
{
struct mvusb_mdio *mvusb = mdio->priv;
int alen;
if (dev & MII_ADDR_C45)
return -EOPNOTSUPP;
mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0x8000 | (dev << 5) | reg);
mvusb->buf[MVUSB_CMD_VAL] = cpu_to_le16(val);
return usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),
mvusb->buf, 8, &alen, 100);
}
static int mvusb_mdio_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct device *dev = &interface->dev;
struct mvusb_mdio *mvusb;
struct mii_bus *mdio;
mdio = devm_mdiobus_alloc_size(dev, sizeof(*mvusb));
if (!mdio)
return -ENOMEM;
mvusb = mdio->priv;
mvusb->mdio = mdio;
mvusb->udev = usb_get_dev(interface_to_usbdev(interface));
/* Reversed from USB PCAPs, no idea what these mean. */
mvusb->buf[MVUSB_CMD_PREAMBLE0] = cpu_to_le16(0xe800);
mvusb->buf[MVUSB_CMD_PREAMBLE1] = cpu_to_le16(0x0001);
snprintf(mdio->id, MII_BUS_ID_SIZE, "mvusb-%s", dev_name(dev));
mdio->name = mdio->id;
mdio->parent = dev;
mdio->read = mvusb_mdio_read;
mdio->write = mvusb_mdio_write;
usb_set_intfdata(interface, mvusb);
return of_mdiobus_register(mdio, dev->of_node);
}
static void mvusb_mdio_disconnect(struct usb_interface *interface)
{
struct mvusb_mdio *mvusb = usb_get_intfdata(interface);
struct usb_device *udev = mvusb->udev;
mdiobus_unregister(mvusb->mdio);
usb_set_intfdata(interface, NULL);
usb_put_dev(udev);
}
static struct usb_driver mvusb_mdio_driver = {
.name = "mvusb_mdio",
.id_table = mvusb_mdio_table,
.probe = mvusb_mdio_probe,
.disconnect = mvusb_mdio_disconnect,
};
module_usb_driver(mvusb_mdio_driver);
MODULE_AUTHOR("Tobias Waldekranz <tobias@waldekranz.com>");
MODULE_DESCRIPTION("Marvell USB MDIO Adapter");
MODULE_LICENSE("GPL");
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