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#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include <linux/usb/usbnet.h>
#define RTL815x_REQT_READ 0xc0
#define RTL815x_REQT_WRITE 0x40
#define RTL815x_REQ_GET_REGS 0x05
#define RTL815x_REQ_SET_REGS 0x05
#define MCU_TYPE_PLA 0x0100
#define OCP_BASE 0xe86c
#define BASE_MII 0xa400
#define BYTE_EN_DWORD 0xff
#define BYTE_EN_WORD 0x33
#define BYTE_EN_BYTE 0x11
#define R815x_PHY_ID 32
#define REALTEK_VENDOR_ID 0x0bda
static int pla_read_word(struct usb_device *udev, u16 index)
{
int ret;
u8 shift = index & 2;
__le32 *tmp;
tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
if (!tmp)
return -ENOMEM;
index &= ~3;
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
RTL815x_REQ_GET_REGS, RTL815x_REQT_READ,
index, MCU_TYPE_PLA, tmp, sizeof(*tmp), 500);
if (ret < 0)
goto out2;
ret = __le32_to_cpu(*tmp);
ret >>= (shift * 8);
ret &= 0xffff;
out2:
kfree(tmp);
return ret;
}
static int pla_write_word(struct usb_device *udev, u16 index, u32 data)
{
__le32 *tmp;
u32 mask = 0xffff;
u16 byen = BYTE_EN_WORD;
u8 shift = index & 2;
int ret;
tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
if (!tmp)
return -ENOMEM;
data &= mask;
if (shift) {
byen <<= shift;
mask <<= (shift * 8);
data <<= (shift * 8);
index &= ~3;
}
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
RTL815x_REQ_GET_REGS, RTL815x_REQT_READ,
index, MCU_TYPE_PLA, tmp, sizeof(*tmp), 500);
if (ret < 0)
goto out3;
data |= __le32_to_cpu(*tmp) & ~mask;
*tmp = __cpu_to_le32(data);
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
RTL815x_REQ_SET_REGS, RTL815x_REQT_WRITE,
index, MCU_TYPE_PLA | byen, tmp, sizeof(*tmp),
500);
out3:
kfree(tmp);
return ret;
}
static int ocp_reg_read(struct usbnet *dev, u16 addr)
{
u16 ocp_base, ocp_index;
int ret;
ocp_base = addr & 0xf000;
ret = pla_write_word(dev->udev, OCP_BASE, ocp_base);
if (ret < 0)
goto out;
ocp_index = (addr & 0x0fff) | 0xb000;
ret = pla_read_word(dev->udev, ocp_index);
out:
return ret;
}
static int ocp_reg_write(struct usbnet *dev, u16 addr, u16 data)
{
u16 ocp_base, ocp_index;
int ret;
ocp_base = addr & 0xf000;
ret = pla_write_word(dev->udev, OCP_BASE, ocp_base);
if (ret < 0)
goto out1;
ocp_index = (addr & 0x0fff) | 0xb000;
ret = pla_write_word(dev->udev, ocp_index, data);
out1:
return ret;
}
static int r815x_mdio_read(struct net_device *netdev, int phy_id, int reg)
{
struct usbnet *dev = netdev_priv(netdev);
int ret;
if (phy_id != R815x_PHY_ID)
return -EINVAL;
if (usb_autopm_get_interface(dev->intf) < 0)
return -ENODEV;
ret = ocp_reg_read(dev, BASE_MII + reg * 2);
usb_autopm_put_interface(dev->intf);
return ret;
}
static
void r815x_mdio_write(struct net_device *netdev, int phy_id, int reg, int val)
{
struct usbnet *dev = netdev_priv(netdev);
if (phy_id != R815x_PHY_ID)
return;
if (usb_autopm_get_interface(dev->intf) < 0)
return;
ocp_reg_write(dev, BASE_MII + reg * 2, val);
usb_autopm_put_interface(dev->intf);
}
static int r8153_bind(struct usbnet *dev, struct usb_interface *intf)
{
int status;
status = usbnet_cdc_bind(dev, intf);
if (status < 0)
return status;
dev->mii.dev = dev->net;
dev->mii.mdio_read = r815x_mdio_read;
dev->mii.mdio_write = r815x_mdio_write;
dev->mii.phy_id_mask = 0x3f;
dev->mii.reg_num_mask = 0x1f;
dev->mii.phy_id = R815x_PHY_ID;
dev->mii.supports_gmii = 1;
return 0;
}
static int r8152_bind(struct usbnet *dev, struct usb_interface *intf)
{
int status;
status = usbnet_cdc_bind(dev, intf);
if (status < 0)
return status;
dev->mii.dev = dev->net;
dev->mii.mdio_read = r815x_mdio_read;
dev->mii.mdio_write = r815x_mdio_write;
dev->mii.phy_id_mask = 0x3f;
dev->mii.reg_num_mask = 0x1f;
dev->mii.phy_id = R815x_PHY_ID;
dev->mii.supports_gmii = 0;
return 0;
}
static const struct driver_info r8152_info = {
.description = "RTL8152 ECM Device",
.flags = FLAG_ETHER | FLAG_POINTTOPOINT,
.bind = r8152_bind,
.unbind = usbnet_cdc_unbind,
.status = usbnet_cdc_status,
.manage_power = usbnet_manage_power,
};
static const struct driver_info r8153_info = {
.description = "RTL8153 ECM Device",
.flags = FLAG_ETHER | FLAG_POINTTOPOINT,
.bind = r8153_bind,
.unbind = usbnet_cdc_unbind,
.status = usbnet_cdc_status,
.manage_power = usbnet_manage_power,
};
static const struct usb_device_id products[] = {
{
USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
#if defined(CONFIG_USB_RTL8152) || defined(CONFIG_USB_RTL8152_MODULE)
.driver_info = 0,
#else
.driver_info = (unsigned long) &r8152_info,
#endif
},
{
USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
#if defined(CONFIG_USB_RTL8153) || defined(CONFIG_USB_RTL8153_MODULE)
.driver_info = 0,
#else
.driver_info = (unsigned long) &r8153_info,
#endif
},
{ }, /* END */
};
MODULE_DEVICE_TABLE(usb, products);
static struct usb_driver r815x_driver = {
.name = "r815x",
.id_table = products,
.probe = usbnet_probe,
.disconnect = usbnet_disconnect,
.suspend = usbnet_suspend,
.resume = usbnet_resume,
.reset_resume = usbnet_resume,
.supports_autosuspend = 1,
.disable_hub_initiated_lpm = 1,
};
module_usb_driver(r815x_driver);
MODULE_AUTHOR("Hayes Wang");
MODULE_DESCRIPTION("Realtek USB ECM device");
MODULE_LICENSE("GPL");
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