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Subject[PATCH net-next] net/usb: add relative mii functions for r815x
Date
Base on cdc_ether, add the mii functions for RTL8152 and RTL8153.
The RTL8152 and RTL8153 support ECM mode which use the driver of
cdc_ether. Add the mii functions. Then, the basic PHY access is
possible.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
---
drivers/net/usb/Makefile | 2 +-
drivers/net/usb/cdc_ether.c | 9 +-
drivers/net/usb/r815x.c | 231 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 239 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/usb/r815x.c

diff --git a/drivers/net/usb/Makefile b/drivers/net/usb/Makefile
index 9ab5c9d..e817178 100644
--- a/drivers/net/usb/Makefile
+++ b/drivers/net/usb/Makefile
@@ -11,7 +11,7 @@ obj-$(CONFIG_USB_HSO) += hso.o
obj-$(CONFIG_USB_NET_AX8817X) += asix.o
asix-y := asix_devices.o asix_common.o ax88172a.o
obj-$(CONFIG_USB_NET_AX88179_178A) += ax88179_178a.o
-obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o
+obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o r815x.o
obj-$(CONFIG_USB_NET_CDC_EEM) += cdc_eem.o
obj-$(CONFIG_USB_NET_DM9601) += dm9601.o
obj-$(CONFIG_USB_NET_SMSC75XX) += smsc75xx.o
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 4393f14..03ad4dc 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -646,13 +646,18 @@ static const struct usb_device_id products [] = {
},

/* Realtek RTL8152 Based USB 2.0 Ethernet Adapters */
-#if defined(CONFIG_USB_RTL8152) || defined(CONFIG_USB_RTL8152_MODULE)
{
USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8152, USB_CLASS_COMM,
USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
.driver_info = 0,
},
-#endif
+
+/* Realtek RTL8153 Based USB 3.0 Ethernet Adapters */
+{
+ USB_DEVICE_AND_INTERFACE_INFO(REALTEK_VENDOR_ID, 0x8153, USB_CLASS_COMM,
+ USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
+ .driver_info = 0,
+},

/*
* WHITELIST!!!
diff --git a/drivers/net/usb/r815x.c b/drivers/net/usb/r815x.c
new file mode 100644
index 0000000..6516737
--- /dev/null
+++ b/drivers/net/usb/r815x.c
@@ -0,0 +1,231 @@
+#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 data, ret;
+ u8 shift = index & 2;
+
+ index &= ~3;
+
+ ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+ RTL815x_REQ_GET_REGS, RTL815x_REQT_READ,
+ index, MCU_TYPE_PLA, &data, sizeof(data), 500);
+ if (ret < 0)
+ return ret;
+
+ data = __le32_to_cpu(data);
+ data >>= (shift * 8);
+ data &= 0xffff;
+
+ return data;
+}
+
+static int pla_write_word(struct usb_device *udev, u16 index, u32 data)
+{
+ u32 tmp, mask = 0xffff;
+ u16 byen = BYTE_EN_WORD;
+ u8 shift = index & 2;
+ int ret;
+
+ 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)
+ return ret;
+
+ tmp = __le32_to_cpu(tmp) & ~mask;
+ tmp |= data;
+ tmp = __cpu_to_le32(tmp);
+
+ 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);
+
+ 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);
+
+ if (phy_id != R815x_PHY_ID)
+ return -EINVAL;
+
+ return ocp_reg_read(dev, BASE_MII + reg * 2);
+}
+
+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;
+
+ ocp_reg_write(dev, BASE_MII + reg * 2, val);
+}
+
+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");
--
1.8.3.1


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