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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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a9770eac51
Move all the MDIO drivers and multiplexers into drivers/net/mdio. The mdio core is however left in the phy directory, due to mutual dependencies between the MDIO core and the PHY core. Take this opportunity to sort the Kconfig based on the menuconfig strings, and move the multiplexers to the end with a separating comment. v2: Fix typo in commit message Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_mdio.h>
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#include <linux/phy.h>
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#include <linux/usb.h>
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#define USB_MARVELL_VID 0x1286
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static const struct usb_device_id mvusb_mdio_table[] = {
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{ USB_DEVICE(USB_MARVELL_VID, 0x1fa4) },
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{}
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};
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MODULE_DEVICE_TABLE(usb, mvusb_mdio_table);
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enum {
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MVUSB_CMD_PREAMBLE0,
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MVUSB_CMD_PREAMBLE1,
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MVUSB_CMD_ADDR,
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MVUSB_CMD_VAL,
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};
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struct mvusb_mdio {
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struct usb_device *udev;
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struct mii_bus *mdio;
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__le16 buf[4];
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};
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static int mvusb_mdio_read(struct mii_bus *mdio, int dev, int reg)
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{
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struct mvusb_mdio *mvusb = mdio->priv;
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int err, alen;
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if (dev & MII_ADDR_C45)
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return -EOPNOTSUPP;
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mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0xa400 | (dev << 5) | reg);
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err = usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),
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mvusb->buf, 6, &alen, 100);
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if (err)
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return err;
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err = usb_bulk_msg(mvusb->udev, usb_rcvbulkpipe(mvusb->udev, 6),
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&mvusb->buf[MVUSB_CMD_VAL], 2, &alen, 100);
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if (err)
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return err;
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return le16_to_cpu(mvusb->buf[MVUSB_CMD_VAL]);
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}
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static int mvusb_mdio_write(struct mii_bus *mdio, int dev, int reg, u16 val)
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{
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struct mvusb_mdio *mvusb = mdio->priv;
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int alen;
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if (dev & MII_ADDR_C45)
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return -EOPNOTSUPP;
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mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0x8000 | (dev << 5) | reg);
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mvusb->buf[MVUSB_CMD_VAL] = cpu_to_le16(val);
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return usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),
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mvusb->buf, 8, &alen, 100);
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}
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static int mvusb_mdio_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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struct device *dev = &interface->dev;
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struct mvusb_mdio *mvusb;
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struct mii_bus *mdio;
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mdio = devm_mdiobus_alloc_size(dev, sizeof(*mvusb));
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if (!mdio)
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return -ENOMEM;
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mvusb = mdio->priv;
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mvusb->mdio = mdio;
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mvusb->udev = usb_get_dev(interface_to_usbdev(interface));
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/* Reversed from USB PCAPs, no idea what these mean. */
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mvusb->buf[MVUSB_CMD_PREAMBLE0] = cpu_to_le16(0xe800);
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mvusb->buf[MVUSB_CMD_PREAMBLE1] = cpu_to_le16(0x0001);
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snprintf(mdio->id, MII_BUS_ID_SIZE, "mvusb-%s", dev_name(dev));
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mdio->name = mdio->id;
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mdio->parent = dev;
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mdio->read = mvusb_mdio_read;
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mdio->write = mvusb_mdio_write;
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usb_set_intfdata(interface, mvusb);
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return of_mdiobus_register(mdio, dev->of_node);
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}
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static void mvusb_mdio_disconnect(struct usb_interface *interface)
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{
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struct mvusb_mdio *mvusb = usb_get_intfdata(interface);
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struct usb_device *udev = mvusb->udev;
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mdiobus_unregister(mvusb->mdio);
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usb_set_intfdata(interface, NULL);
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usb_put_dev(udev);
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}
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static struct usb_driver mvusb_mdio_driver = {
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.name = "mvusb_mdio",
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.id_table = mvusb_mdio_table,
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.probe = mvusb_mdio_probe,
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.disconnect = mvusb_mdio_disconnect,
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};
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module_usb_driver(mvusb_mdio_driver);
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MODULE_AUTHOR("Tobias Waldekranz <tobias@waldekranz.com>");
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MODULE_DESCRIPTION("Marvell USB MDIO Adapter");
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MODULE_LICENSE("GPL");
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