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170 lines
3.6 KiB
170 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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#include <linux/module.h> |
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#include <linux/netdevice.h> |
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#include <linux/mii.h> |
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#include <linux/usb.h> |
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#include <linux/usb/cdc.h> |
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#include <linux/usb/usbnet.h> |
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#include <linux/usb/r8152.h> |
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#define OCP_BASE 0xe86c |
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static int pla_read_word(struct usbnet *dev, u16 index) |
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{ |
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u16 byen = BYTE_EN_WORD; |
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u8 shift = index & 2; |
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__le32 tmp; |
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int ret; |
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if (shift) |
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byen <<= shift; |
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index &= ~3; |
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ret = usbnet_read_cmd(dev, RTL8152_REQ_GET_REGS, RTL8152_REQT_READ, index, |
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MCU_TYPE_PLA | byen, &tmp, sizeof(tmp)); |
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if (ret < 0) |
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goto out; |
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ret = __le32_to_cpu(tmp); |
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ret >>= (shift * 8); |
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ret &= 0xffff; |
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out: |
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return ret; |
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} |
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static int pla_write_word(struct usbnet *dev, u16 index, u32 data) |
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{ |
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u32 mask = 0xffff; |
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u16 byen = BYTE_EN_WORD; |
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u8 shift = index & 2; |
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__le32 tmp; |
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int ret; |
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data &= mask; |
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if (shift) { |
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byen <<= shift; |
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mask <<= (shift * 8); |
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data <<= (shift * 8); |
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} |
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index &= ~3; |
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ret = usbnet_read_cmd(dev, RTL8152_REQ_GET_REGS, RTL8152_REQT_READ, index, |
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MCU_TYPE_PLA | byen, &tmp, sizeof(tmp)); |
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if (ret < 0) |
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goto out; |
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data |= __le32_to_cpu(tmp) & ~mask; |
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tmp = __cpu_to_le32(data); |
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ret = usbnet_write_cmd(dev, RTL8152_REQ_SET_REGS, RTL8152_REQT_WRITE, index, |
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MCU_TYPE_PLA | byen, &tmp, sizeof(tmp)); |
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out: |
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return ret; |
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} |
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static int r8153_ecm_mdio_read(struct net_device *netdev, int phy_id, int reg) |
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{ |
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struct usbnet *dev = netdev_priv(netdev); |
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int ret; |
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ret = pla_write_word(dev, OCP_BASE, 0xa000); |
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if (ret < 0) |
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goto out; |
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ret = pla_read_word(dev, 0xb400 + reg * 2); |
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out: |
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return ret; |
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} |
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static void r8153_ecm_mdio_write(struct net_device *netdev, int phy_id, int reg, int val) |
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{ |
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struct usbnet *dev = netdev_priv(netdev); |
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int ret; |
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ret = pla_write_word(dev, OCP_BASE, 0xa000); |
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if (ret < 0) |
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return; |
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ret = pla_write_word(dev, 0xb400 + reg * 2, val); |
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} |
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static int r8153_bind(struct usbnet *dev, struct usb_interface *intf) |
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{ |
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int status; |
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status = usbnet_cdc_bind(dev, intf); |
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if (status < 0) |
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return status; |
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dev->mii.dev = dev->net; |
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dev->mii.mdio_read = r8153_ecm_mdio_read; |
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dev->mii.mdio_write = r8153_ecm_mdio_write; |
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dev->mii.reg_num_mask = 0x1f; |
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dev->mii.supports_gmii = 1; |
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return status; |
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} |
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static const struct driver_info r8153_info = { |
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.description = "RTL8153 ECM Device", |
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.flags = FLAG_ETHER, |
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.bind = r8153_bind, |
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.unbind = usbnet_cdc_unbind, |
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.status = usbnet_cdc_status, |
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.manage_power = usbnet_manage_power, |
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}; |
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static const struct usb_device_id products[] = { |
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/* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */ |
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{ |
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USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID_REALTEK, 0x8153, USB_CLASS_COMM, |
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USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE), |
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.driver_info = (unsigned long)&r8153_info, |
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}, |
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/* Lenovo Powered USB-C Travel Hub (4X90S92381, based on Realtek RTL8153) */ |
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{ |
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USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID_LENOVO, 0x721e, USB_CLASS_COMM, |
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USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE), |
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.driver_info = (unsigned long)&r8153_info, |
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}, |
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{ }, /* END */ |
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}; |
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MODULE_DEVICE_TABLE(usb, products); |
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static int rtl8153_ecm_probe(struct usb_interface *intf, |
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const struct usb_device_id *id) |
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{ |
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#if IS_REACHABLE(CONFIG_USB_RTL8152) |
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if (rtl8152_get_version(intf)) |
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return -ENODEV; |
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#endif |
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return usbnet_probe(intf, id); |
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} |
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static struct usb_driver r8153_ecm_driver = { |
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.name = "r8153_ecm", |
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.id_table = products, |
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.probe = rtl8153_ecm_probe, |
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.disconnect = usbnet_disconnect, |
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.suspend = usbnet_suspend, |
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.resume = usbnet_resume, |
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.reset_resume = usbnet_resume, |
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.supports_autosuspend = 1, |
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.disable_hub_initiated_lpm = 1, |
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}; |
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module_usb_driver(r8153_ecm_driver); |
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MODULE_AUTHOR("Hayes Wang"); |
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MODULE_DESCRIPTION("Realtek USB ECM device"); |
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MODULE_LICENSE("GPL");
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