1 // SPDX-License-Identifier: GPL-2.0
9 #define USB_MARVELL_VID	0x1286
12 	{ USB_DEVICE(USB_MARVELL_VID, 0x1fa4) },
27 	struct mii_bus *mdio;  member
32 static int mvusb_mdio_read(struct mii_bus *mdio, int dev, int reg)  in mvusb_mdio_read()  argument
34 	struct mvusb_mdio *mvusb = mdio->priv;  in mvusb_mdio_read()
38 		return -EOPNOTSUPP;  in mvusb_mdio_read()
40 	mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0xa400 | (dev << 5) | reg);  in mvusb_mdio_read()
42 	err = usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),  in mvusb_mdio_read()
43 			   mvusb->buf, 6, &alen, 100);  in mvusb_mdio_read()
47 	err = usb_bulk_msg(mvusb->udev, usb_rcvbulkpipe(mvusb->udev, 6),  in mvusb_mdio_read()
48 			   &mvusb->buf[MVUSB_CMD_VAL], 2, &alen, 100);  in mvusb_mdio_read()
52 	return le16_to_cpu(mvusb->buf[MVUSB_CMD_VAL]);  in mvusb_mdio_read()
55 static int mvusb_mdio_write(struct mii_bus *mdio, int dev, int reg, u16 val)  in mvusb_mdio_write()  argument
57 	struct mvusb_mdio *mvusb = mdio->priv;  in mvusb_mdio_write()
61 		return -EOPNOTSUPP;  in mvusb_mdio_write()
63 	mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0x8000 | (dev << 5) | reg);  in mvusb_mdio_write()
64 	mvusb->buf[MVUSB_CMD_VAL]  = cpu_to_le16(val);  in mvusb_mdio_write()
66 	return usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),  in mvusb_mdio_write()
67 			    mvusb->buf, 8, &alen, 100);  in mvusb_mdio_write()
73 	struct device *dev = &interface->dev;  in mvusb_mdio_probe()
75 	struct mii_bus *mdio;  in mvusb_mdio_probe()  local
78 	mdio = devm_mdiobus_alloc_size(dev, sizeof(*mvusb));  in mvusb_mdio_probe()
79 	if (!mdio)  in mvusb_mdio_probe()
80 		return -ENOMEM;  in mvusb_mdio_probe()
82 	mvusb = mdio->priv;  in mvusb_mdio_probe()
83 	mvusb->mdio = mdio;  in mvusb_mdio_probe()
84 	mvusb->udev = usb_get_dev(interface_to_usbdev(interface));  in mvusb_mdio_probe()
87 	mvusb->buf[MVUSB_CMD_PREAMBLE0] = cpu_to_le16(0xe800);  in mvusb_mdio_probe()
88 	mvusb->buf[MVUSB_CMD_PREAMBLE1] = cpu_to_le16(0x0001);  in mvusb_mdio_probe()
90 	snprintf(mdio->id, MII_BUS_ID_SIZE, "mvusb-%s", dev_name(dev));  in mvusb_mdio_probe()
91 	mdio->name = mdio->id;  in mvusb_mdio_probe()
92 	mdio->parent = dev;  in mvusb_mdio_probe()
93 	mdio->read = mvusb_mdio_read;  in mvusb_mdio_probe()
94 	mdio->write = mvusb_mdio_write;  in mvusb_mdio_probe()
97 	ret = of_mdiobus_register(mdio, dev->of_node);  in mvusb_mdio_probe()
101 	return 0;  in mvusb_mdio_probe()
104 	usb_put_dev(mvusb->udev);  in mvusb_mdio_probe()
111 	struct usb_device *udev = mvusb->udev;  in mvusb_mdio_disconnect()
113 	mdiobus_unregister(mvusb->mdio);  in mvusb_mdio_disconnect()
128 MODULE_DESCRIPTION("Marvell USB MDIO Adapter");