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()
37 	mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0xa400 | (dev << 5) | reg);  in mvusb_mdio_read()
39 	err = usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),  in mvusb_mdio_read()
40 			   mvusb->buf, 6, &alen, 100);  in mvusb_mdio_read()
44 	err = usb_bulk_msg(mvusb->udev, usb_rcvbulkpipe(mvusb->udev, 6),  in mvusb_mdio_read()
45 			   &mvusb->buf[MVUSB_CMD_VAL], 2, &alen, 100);  in mvusb_mdio_read()
49 	return le16_to_cpu(mvusb->buf[MVUSB_CMD_VAL]);  in mvusb_mdio_read()
52 static int mvusb_mdio_write(struct mii_bus *mdio, int dev, int reg, u16 val)  in mvusb_mdio_write()  argument
54 	struct mvusb_mdio *mvusb = mdio->priv;  in mvusb_mdio_write()
57 	mvusb->buf[MVUSB_CMD_ADDR] = cpu_to_le16(0x8000 | (dev << 5) | reg);  in mvusb_mdio_write()
58 	mvusb->buf[MVUSB_CMD_VAL]  = cpu_to_le16(val);  in mvusb_mdio_write()
60 	return usb_bulk_msg(mvusb->udev, usb_sndbulkpipe(mvusb->udev, 2),  in mvusb_mdio_write()
61 			    mvusb->buf, 8, &alen, 100);  in mvusb_mdio_write()
67 	struct device *dev = &interface->dev;  in mvusb_mdio_probe()
69 	struct mii_bus *mdio;  in mvusb_mdio_probe()  local
72 	mdio = devm_mdiobus_alloc_size(dev, sizeof(*mvusb));  in mvusb_mdio_probe()
73 	if (!mdio)  in mvusb_mdio_probe()
74 		return -ENOMEM;  in mvusb_mdio_probe()
76 	mvusb = mdio->priv;  in mvusb_mdio_probe()
77 	mvusb->mdio = mdio;  in mvusb_mdio_probe()
78 	mvusb->udev = usb_get_dev(interface_to_usbdev(interface));  in mvusb_mdio_probe()
81 	mvusb->buf[MVUSB_CMD_PREAMBLE0] = cpu_to_le16(0xe800);  in mvusb_mdio_probe()
82 	mvusb->buf[MVUSB_CMD_PREAMBLE1] = cpu_to_le16(0x0001);  in mvusb_mdio_probe()
84 	snprintf(mdio->id, MII_BUS_ID_SIZE, "mvusb-%s", dev_name(dev));  in mvusb_mdio_probe()
85 	mdio->name = mdio->id;  in mvusb_mdio_probe()
86 	mdio->parent = dev;  in mvusb_mdio_probe()
87 	mdio->read = mvusb_mdio_read;  in mvusb_mdio_probe()
88 	mdio->write = mvusb_mdio_write;  in mvusb_mdio_probe()
91 	ret = of_mdiobus_register(mdio, dev->of_node);  in mvusb_mdio_probe()
95 	return 0;  in mvusb_mdio_probe()
98 	usb_put_dev(mvusb->udev);  in mvusb_mdio_probe()
105 	struct usb_device *udev = mvusb->udev;  in mvusb_mdio_disconnect()
107 	mdiobus_unregister(mvusb->mdio);  in mvusb_mdio_disconnect()
122 MODULE_DESCRIPTION("Marvell USB MDIO Adapter");