1 // SPDX-License-Identifier: GPL-2.0-or-later
2 #include <linux/module.h>
3 #include <linux/netdevice.h>
6 #include <linux/usb/cdc.h>
7 #include <linux/usb/usbnet.h>
8 #include <linux/usb/r8152.h>
10 #define OCP_BASE 0xe86c
12 static int pla_read_word(struct usbnet *dev, u16 index)
14 u16 byen = BYTE_EN_WORD;
24 ret = usbnet_read_cmd(dev, RTL8152_REQ_GET_REGS, RTL8152_REQT_READ, index,
25 MCU_TYPE_PLA | byen, &tmp, sizeof(tmp));
29 ret = __le32_to_cpu(tmp);
37 static int pla_write_word(struct usbnet *dev, u16 index, u32 data)
40 u16 byen = BYTE_EN_WORD;
55 ret = usbnet_read_cmd(dev, RTL8152_REQ_GET_REGS, RTL8152_REQT_READ, index,
56 MCU_TYPE_PLA | byen, &tmp, sizeof(tmp));
61 data |= __le32_to_cpu(tmp) & ~mask;
62 tmp = __cpu_to_le32(data);
64 ret = usbnet_write_cmd(dev, RTL8152_REQ_SET_REGS, RTL8152_REQT_WRITE, index,
65 MCU_TYPE_PLA | byen, &tmp, sizeof(tmp));
71 static int r8153_ecm_mdio_read(struct net_device *netdev, int phy_id, int reg)
73 struct usbnet *dev = netdev_priv(netdev);
76 ret = pla_write_word(dev, OCP_BASE, 0xa000);
80 ret = pla_read_word(dev, 0xb400 + reg * 2);
86 static void r8153_ecm_mdio_write(struct net_device *netdev, int phy_id, int reg, int val)
88 struct usbnet *dev = netdev_priv(netdev);
91 ret = pla_write_word(dev, OCP_BASE, 0xa000);
95 ret = pla_write_word(dev, 0xb400 + reg * 2, val);
98 static int r8153_bind(struct usbnet *dev, struct usb_interface *intf)
102 status = usbnet_cdc_bind(dev, intf);
106 dev->mii.dev = dev->net;
107 dev->mii.mdio_read = r8153_ecm_mdio_read;
108 dev->mii.mdio_write = r8153_ecm_mdio_write;
109 dev->mii.reg_num_mask = 0x1f;
110 dev->mii.supports_gmii = 1;
115 static const struct driver_info r8153_info = {
116 .description = "RTL8153 ECM Device",
119 .unbind = usbnet_cdc_unbind,
120 .status = usbnet_cdc_status,
121 .manage_power = usbnet_manage_power,
124 static const struct usb_device_id products[] = {
126 USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID_REALTEK, 0x8153, USB_CLASS_COMM,
127 USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
128 .driver_info = (unsigned long)&r8153_info,
133 MODULE_DEVICE_TABLE(usb, products);
135 static int rtl8153_ecm_probe(struct usb_interface *intf,
136 const struct usb_device_id *id)
138 #if IS_REACHABLE(CONFIG_USB_RTL8152)
139 if (rtl8152_get_version(intf))
143 return usbnet_probe(intf, id);
146 static struct usb_driver r8153_ecm_driver = {
148 .id_table = products,
149 .probe = rtl8153_ecm_probe,
150 .disconnect = usbnet_disconnect,
151 .suspend = usbnet_suspend,
152 .resume = usbnet_resume,
153 .reset_resume = usbnet_resume,
154 .supports_autosuspend = 1,
155 .disable_hub_initiated_lpm = 1,
158 module_usb_driver(r8153_ecm_driver);
160 MODULE_AUTHOR("Hayes Wang");
161 MODULE_DESCRIPTION("Realtek USB ECM device");
162 MODULE_LICENSE("GPL");