usb: net: Add support for Microchip LAN75xx and LAN78xx
authorYuiko Oshino <yuiko.oshino@microchip.com>
Fri, 11 Aug 2017 16:44:58 +0000 (12:44 -0400)
committerJoe Hershberger <joe.hershberger@ni.com>
Mon, 14 Aug 2017 17:47:33 +0000 (12:47 -0500)
Add support for Microchip LAN7500, LAN7800 and LAN7850,
USB to 10/100/1000 Ethernet Controllers.

Signed-off-by: Yuiko Oshino <yuiko.oshino@microchip.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
drivers/usb/Kconfig
drivers/usb/eth/Kconfig [new file with mode: 0644]
drivers/usb/eth/Makefile
drivers/usb/eth/lan75xx.c [new file with mode: 0644]
drivers/usb/eth/lan78xx.c [new file with mode: 0644]
drivers/usb/eth/lan7x.c [new file with mode: 0644]
drivers/usb/eth/lan7x.h [new file with mode: 0644]

index da3ec2fa7558eb7f722fb9638e6838e7a429d68e..62126aad2fb414fac590144f9e76e264bf927dc1 100644 (file)
@@ -94,4 +94,6 @@ endif
 
 source "drivers/usb/gadget/Kconfig"
 
+source "drivers/usb/eth/Kconfig"
+
 endif
diff --git a/drivers/usb/eth/Kconfig b/drivers/usb/eth/Kconfig
new file mode 100644 (file)
index 0000000..14cfa26
--- /dev/null
@@ -0,0 +1,17 @@
+comment "USB to Ethernet Controller Drivers"
+
+config USB_ETHER_LAN75XX
+       bool "Microchip LAN75XX support"
+       ---help---
+         Say Y here if you would like to support Microchip LAN75XX Hi-Speed
+         USB 2.0 to 10/100/1000 Gigabit Ethernet controller.
+         Supports 10Base-T/ 100Base-TX/1000Base-T.
+         This driver supports the internal PHY.
+
+config USB_ETHER_LAN78XX
+       bool "Microchip LAN78XX support"
+       ---help---
+         Say Y here if you would like to support Microchip LAN78XX USB 3.1
+         Gen 1 to 10/100/1000 Gigabit Ethernet controller.
+         Supports 10Base-T/ 100Base-TX/1000Base-T.
+         This driver supports the internal PHY.
index 4c44efc7a15a3aad21de336df7420e4d6a46715a..4b935a3f0446c809c45cc091ef01074a8fe41589 100644 (file)
@@ -9,4 +9,6 @@ obj-$(CONFIG_USB_ETHER_ASIX) += asix.o
 obj-$(CONFIG_USB_ETHER_ASIX88179) += asix88179.o
 obj-$(CONFIG_USB_ETHER_MCS7830) += mcs7830.o
 obj-$(CONFIG_USB_ETHER_SMSC95XX) += smsc95xx.o
+obj-$(CONFIG_USB_ETHER_LAN75XX) += lan7x.o lan75xx.o
+obj-$(CONFIG_USB_ETHER_LAN78XX) += lan7x.o lan78xx.o
 obj-$(CONFIG_USB_ETHER_RTL8152) += r8152.o r8152_fw.o
diff --git a/drivers/usb/eth/lan75xx.c b/drivers/usb/eth/lan75xx.c
new file mode 100644 (file)
index 0000000..1c80158
--- /dev/null
@@ -0,0 +1,315 @@
+/*
+ * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <dm.h>
+#include <usb.h>
+#include <linux/mii.h>
+#include "usb_ether.h"
+#include "lan7x.h"
+
+/* LAN75xx specific register/bit defines */
+#define LAN75XX_HW_CFG_BIR             BIT(7)
+
+#define LAN75XX_BURST_CAP              0x034
+
+#define LAN75XX_BULK_IN_DLY            0x03C
+
+#define LAN75XX_RFE_CTL                        0x060
+
+#define LAN75XX_FCT_RX_CTL             0x090
+
+#define LAN75XX_FCT_TX_CTL             0x094
+
+#define LAN75XX_FCT_RX_FIFO_END                0x098
+
+#define LAN75XX_FCT_TX_FIFO_END                0x09C
+
+#define LAN75XX_FCT_FLOW               0x0A0
+
+/* MAC ADDRESS PERFECT FILTER For LAN75xx */
+#define LAN75XX_ADDR_FILTX             0x300
+#define LAN75XX_ADDR_FILTX_FB_VALID    BIT(31)
+
+/*
+ * Lan75xx infrastructure commands
+ */
+static int lan75xx_phy_gig_workaround(struct usb_device *udev,
+                                     struct ueth_data *dev)
+{
+       int ret = 0;
+
+       /* Only internal phy */
+       /* Set the phy in Gig loopback */
+       lan7x_mdio_write(udev, dev->phy_id, MII_BMCR,
+                        (BMCR_LOOPBACK | BMCR_SPEED1000));
+
+       /* Wait for the link up */
+       ret = lan7x_mdio_wait_for_bit(udev, "BMSR_LSTATUS",
+                                     dev->phy_id, MII_BMSR, BMSR_LSTATUS,
+                                     true, PHY_CONNECT_TIMEOUT_MS, 1);
+       if (ret)
+               return ret;
+
+       /* phy reset */
+       return lan7x_pmt_phy_reset(udev, dev);
+}
+
+static int lan75xx_update_flowcontrol(struct usb_device *udev,
+                                     struct ueth_data *dev)
+{
+       uint32_t flow = 0, fct_flow = 0;
+       int ret;
+
+       ret = lan7x_update_flowcontrol(udev, dev, &flow, &fct_flow);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN75XX_FCT_FLOW, fct_flow);
+       if (ret)
+               return ret;
+       return lan7x_write_reg(udev, FLOW, flow);
+}
+
+static int lan75xx_set_receive_filter(struct usb_device *udev)
+{
+       /* No multicast in u-boot */
+       return lan7x_write_reg(udev, LAN75XX_RFE_CTL,
+                              RFE_CTL_BCAST_EN | RFE_CTL_DA_PERFECT);
+}
+
+/* starts the TX path */
+static void lan75xx_start_tx_path(struct usb_device *udev)
+{
+       /* Enable Tx at MAC */
+       lan7x_write_reg(udev, MAC_TX, MAC_TX_TXEN);
+
+       /* Enable Tx at SCSRs */
+       lan7x_write_reg(udev, LAN75XX_FCT_TX_CTL, FCT_TX_CTL_EN);
+}
+
+/* Starts the Receive path */
+static void lan75xx_start_rx_path(struct usb_device *udev)
+{
+       /* Enable Rx at MAC */
+       lan7x_write_reg(udev, MAC_RX,
+                       LAN7X_MAC_RX_MAX_SIZE_DEFAULT |
+                       MAC_RX_FCS_STRIP | MAC_RX_RXEN);
+
+       /* Enable Rx at SCSRs */
+       lan7x_write_reg(udev, LAN75XX_FCT_RX_CTL, FCT_RX_CTL_EN);
+}
+
+static int lan75xx_basic_reset(struct usb_device *udev,
+                              struct ueth_data *dev,
+                              struct lan7x_private *priv)
+{
+       int ret;
+       u32 val;
+
+       ret = lan7x_basic_reset(udev, dev);
+       if (ret)
+               return ret;
+
+       /* Keep the chip ID */
+       ret = lan7x_read_reg(udev, ID_REV, &val);
+       if (ret)
+               return ret;
+       debug("LAN75xx ID_REV = 0x%08x\n", val);
+
+       priv->chipid = (val & ID_REV_CHIP_ID_MASK) >> 16;
+
+       /* Respond to the IN token with a NAK */
+       ret = lan7x_read_reg(udev, HW_CFG, &val);
+       if (ret)
+               return ret;
+       val |= LAN75XX_HW_CFG_BIR;
+       return lan7x_write_reg(udev, HW_CFG, val);
+}
+
+int lan75xx_write_hwaddr(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct eth_pdata *pdata = dev_get_platdata(dev);
+       unsigned char *enetaddr = pdata->enetaddr;
+       u32 addr_lo = get_unaligned_le32(&enetaddr[0]);
+       u32 addr_hi = (u32)get_unaligned_le16(&enetaddr[4]);
+       int ret;
+
+       /* set hardware address */
+       ret = lan7x_write_reg(udev, RX_ADDRL, addr_lo);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, RX_ADDRH, addr_hi);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN75XX_ADDR_FILTX + 4, addr_lo);
+       if (ret)
+               return ret;
+
+       addr_hi |= LAN75XX_ADDR_FILTX_FB_VALID;
+       ret = lan7x_write_reg(udev, LAN75XX_ADDR_FILTX, addr_hi);
+       if (ret)
+               return ret;
+
+       debug("MAC addr %pM written\n", enetaddr);
+
+       return 0;
+}
+
+static int lan75xx_eth_start(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct lan7x_private *priv = dev_get_priv(dev);
+       struct ueth_data *ueth = &priv->ueth;
+       int ret;
+       u32 write_buf;
+
+       /* Reset and read Mac addr were done in probe() */
+       ret = lan75xx_write_hwaddr(dev);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, INT_STS, 0xFFFFFFFF);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN75XX_BURST_CAP, 0);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN75XX_BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
+       if (ret)
+               return ret;
+
+       /* set FIFO sizes */
+       write_buf = (MAX_RX_FIFO_SIZE - 512) / 512;
+       ret = lan7x_write_reg(udev, LAN75XX_FCT_RX_FIFO_END, write_buf);
+       if (ret)
+               return ret;
+
+       write_buf = (MAX_TX_FIFO_SIZE - 512) / 512;
+       ret = lan7x_write_reg(udev, LAN75XX_FCT_TX_FIFO_END, write_buf);
+       if (ret)
+               return ret;
+
+       /* Init Tx */
+       ret = lan7x_write_reg(udev, FLOW, 0);
+       if (ret)
+               return ret;
+
+       /* Init Rx. Set Vlan, keep default for VLAN on 75xx */
+       ret = lan75xx_set_receive_filter(udev);
+       if (ret)
+               return ret;
+
+       /* phy workaround for gig link */
+       ret = lan75xx_phy_gig_workaround(udev, ueth);
+       if (ret)
+               return ret;
+
+       /* Init PHY, autonego, and link */
+       ret = lan7x_eth_phylib_connect(dev, &priv->ueth);
+       if (ret)
+               return ret;
+       ret = lan7x_eth_phylib_config_start(dev);
+       if (ret)
+               return ret;
+
+       /*
+        * MAC_CR has to be set after PHY init.
+        * MAC will auto detect the PHY speed.
+        */
+       ret = lan7x_read_reg(udev, MAC_CR, &write_buf);
+       if (ret)
+               return ret;
+       write_buf |= MAC_CR_AUTO_DUPLEX | MAC_CR_AUTO_SPEED | MAC_CR_ADP;
+       ret = lan7x_write_reg(udev, MAC_CR, write_buf);
+       if (ret)
+               return ret;
+
+       lan75xx_start_tx_path(udev);
+       lan75xx_start_rx_path(udev);
+
+       return lan75xx_update_flowcontrol(udev, ueth);
+}
+
+int lan75xx_read_rom_hwaddr(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct eth_pdata *pdata = dev_get_platdata(dev);
+       int ret;
+
+       /*
+        * Refer to the doc/README.enetaddr and doc/README.usb for
+        * the U-Boot MAC address policy
+        */
+       ret = lan7x_read_eeprom_mac(pdata->enetaddr, udev);
+       if (ret)
+               memset(pdata->enetaddr, 0, 6);
+
+       return 0;
+}
+
+static int lan75xx_eth_probe(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct lan7x_private *priv = dev_get_priv(dev);
+       struct ueth_data *ueth = &priv->ueth;
+       struct eth_pdata *pdata = dev_get_platdata(dev);
+       int ret;
+
+       /* Do a reset in order to get the MAC address from HW */
+       if (lan75xx_basic_reset(udev, ueth, priv))
+               return 0;
+
+       /* Get the MAC address */
+       /*
+        * We must set the eth->enetaddr from HW because the upper layer
+        * will force to use the environmental var (usbethaddr) or random if
+        * there is no valid MAC address in eth->enetaddr.
+        *
+        * Refer to the doc/README.enetaddr and doc/README.usb for
+        * the U-Boot MAC address policy
+        */
+       lan7x_read_eeprom_mac(pdata->enetaddr, udev);
+       /* Do not return 0 for not finding MAC addr in HW */
+
+       ret = usb_ether_register(dev, ueth, RX_URB_SIZE);
+       if (ret)
+               return ret;
+
+       /* Register phylib */
+       return lan7x_phylib_register(dev);
+}
+
+static const struct eth_ops lan75xx_eth_ops = {
+       .start  = lan75xx_eth_start,
+       .send   = lan7x_eth_send,
+       .recv   = lan7x_eth_recv,
+       .free_pkt = lan7x_free_pkt,
+       .stop   = lan7x_eth_stop,
+       .write_hwaddr = lan75xx_write_hwaddr,
+       .read_rom_hwaddr = lan75xx_read_rom_hwaddr,
+};
+
+U_BOOT_DRIVER(lan75xx_eth) = {
+       .name   = "lan75xx_eth",
+       .id     = UCLASS_ETH,
+       .probe  = lan75xx_eth_probe,
+       .remove = lan7x_eth_remove,
+       .ops    = &lan75xx_eth_ops,
+       .priv_auto_alloc_size = sizeof(struct lan7x_private),
+       .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+};
+
+static const struct usb_device_id lan75xx_eth_id_table[] = {
+       { USB_DEVICE(0x0424, 0x7500) }, /* LAN7500 USB Ethernet */
+       { }             /* Terminating entry */
+};
+
+U_BOOT_USB_DEVICE(lan75xx_eth, lan75xx_eth_id_table);
diff --git a/drivers/usb/eth/lan78xx.c b/drivers/usb/eth/lan78xx.c
new file mode 100644 (file)
index 0000000..d1e61c3
--- /dev/null
@@ -0,0 +1,477 @@
+/*
+ * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <dm.h>
+#include <usb.h>
+#include "usb_ether.h"
+#include "lan7x.h"
+
+/* LAN78xx specific register/bit defines */
+#define LAN78XX_HW_CFG_LED1_EN         BIT(21) /* Muxed with EEDO */
+#define LAN78XX_HW_CFG_LED0_EN         BIT(20) /* Muxed with EECLK */
+
+#define LAN78XX_USB_CFG0               0x080
+#define LAN78XX_USB_CFG0_BIR           BIT(6)
+
+#define LAN78XX_BURST_CAP              0x090
+
+#define LAN78XX_BULK_IN_DLY            0x094
+
+#define LAN78XX_RFE_CTL                        0x0B0
+
+#define LAN78XX_FCT_RX_CTL             0x0C0
+
+#define LAN78XX_FCT_TX_CTL             0x0C4
+
+#define LAN78XX_FCT_RX_FIFO_END                0x0C8
+
+#define LAN78XX_FCT_TX_FIFO_END                0x0CC
+
+#define LAN78XX_FCT_FLOW               0x0D0
+
+#define LAN78XX_MAF_BASE               0x400
+#define LAN78XX_MAF_HIX                        0x00
+#define LAN78XX_MAF_LOX                        0x04
+#define LAN78XX_MAF_HI_BEGIN           (LAN78XX_MAF_BASE + LAN78XX_MAF_HIX)
+#define LAN78XX_MAF_LO_BEGIN           (LAN78XX_MAF_BASE + LAN78XX_MAF_LOX)
+#define LAN78XX_MAF_HI(index)          (LAN78XX_MAF_BASE + (8 * (index)) + \
+                                       LAN78XX_MAF_HIX)
+#define LAN78XX_MAF_LO(index)          (LAN78XX_MAF_BASE + (8 * (index)) + \
+                                       LAN78XX_MAF_LOX)
+#define LAN78XX_MAF_HI_VALID           BIT(31)
+
+/* OTP registers */
+#define LAN78XX_OTP_BASE_ADDR          0x00001000
+
+#define LAN78XX_OTP_PWR_DN             (LAN78XX_OTP_BASE_ADDR + 4 * 0x00)
+#define LAN78XX_OTP_PWR_DN_PWRDN_N     BIT(0)
+
+#define LAN78XX_OTP_ADDR1              (LAN78XX_OTP_BASE_ADDR + 4 * 0x01)
+#define LAN78XX_OTP_ADDR1_15_11                0x1F
+
+#define LAN78XX_OTP_ADDR2              (LAN78XX_OTP_BASE_ADDR + 4 * 0x02)
+#define LAN78XX_OTP_ADDR2_10_3         0xFF
+
+#define LAN78XX_OTP_RD_DATA            (LAN78XX_OTP_BASE_ADDR + 4 * 0x06)
+
+#define LAN78XX_OTP_FUNC_CMD           (LAN78XX_OTP_BASE_ADDR + 4 * 0x08)
+#define LAN78XX_OTP_FUNC_CMD_READ      BIT(0)
+
+#define LAN78XX_OTP_CMD_GO             (LAN78XX_OTP_BASE_ADDR + 4 * 0x0A)
+#define LAN78XX_OTP_CMD_GO_GO          BIT(0)
+
+#define LAN78XX_OTP_STATUS             (LAN78XX_OTP_BASE_ADDR + 4 * 0x0C)
+#define LAN78XX_OTP_STATUS_BUSY                BIT(0)
+
+#define LAN78XX_OTP_INDICATOR_1                0xF3
+#define LAN78XX_OTP_INDICATOR_2                0xF7
+
+/*
+ * Lan78xx infrastructure commands
+ */
+static int lan78xx_read_raw_otp(struct usb_device *udev, u32 offset,
+                               u32 length, u8 *data)
+{
+       int i;
+       int ret;
+       u32 buf;
+
+       ret = lan7x_read_reg(udev, LAN78XX_OTP_PWR_DN, &buf);
+       if (ret)
+               return ret;
+
+       if (buf & LAN78XX_OTP_PWR_DN_PWRDN_N) {
+               /* clear it and wait to be cleared */
+               ret = lan7x_write_reg(udev, LAN78XX_OTP_PWR_DN, 0);
+               if (ret)
+                       return ret;
+
+               ret = lan7x_wait_for_bit(udev, "LAN78XX_OTP_PWR_DN_PWRDN_N",
+                                        LAN78XX_OTP_PWR_DN,
+                                        LAN78XX_OTP_PWR_DN_PWRDN_N,
+                                        false, 1000, 0);
+               if (ret)
+                       return ret;
+       }
+
+       for (i = 0; i < length; i++) {
+               ret = lan7x_write_reg(udev, LAN78XX_OTP_ADDR1,
+                                     ((offset + i) >> 8) &
+                                     LAN78XX_OTP_ADDR1_15_11);
+               if (ret)
+                       return ret;
+               ret = lan7x_write_reg(udev, LAN78XX_OTP_ADDR2,
+                                     ((offset + i) & LAN78XX_OTP_ADDR2_10_3));
+               if (ret)
+                       return ret;
+
+               ret = lan7x_write_reg(udev, LAN78XX_OTP_FUNC_CMD,
+                                     LAN78XX_OTP_FUNC_CMD_READ);
+               if (ret)
+                       return ret;
+               ret = lan7x_write_reg(udev, LAN78XX_OTP_CMD_GO,
+                                     LAN78XX_OTP_CMD_GO_GO);
+
+               if (ret)
+                       return ret;
+
+               ret = lan7x_wait_for_bit(udev, "LAN78XX_OTP_STATUS_BUSY",
+                                        LAN78XX_OTP_STATUS,
+                                        LAN78XX_OTP_STATUS_BUSY,
+                                        false, 1000, 0);
+               if (ret)
+                       return ret;
+
+               ret = lan7x_read_reg(udev, LAN78XX_OTP_RD_DATA, &buf);
+               if (ret)
+                       return ret;
+
+               data[i] = (u8)(buf & 0xFF);
+       }
+
+       return 0;
+}
+
+static int lan78xx_read_otp(struct usb_device *udev, u32 offset,
+                           u32 length, u8 *data)
+{
+       u8 sig;
+       int ret;
+
+       ret = lan78xx_read_raw_otp(udev, 0, 1, &sig);
+
+       if (!ret) {
+               if (sig == LAN78XX_OTP_INDICATOR_1)
+                       offset = offset;
+               else if (sig == LAN78XX_OTP_INDICATOR_2)
+                       offset += 0x100;
+               else
+                       return -EINVAL;
+               ret = lan78xx_read_raw_otp(udev, offset, length, data);
+               if (ret)
+                       return ret;
+       }
+       debug("LAN78x: MAC address from OTP = %pM\n", data);
+
+       return ret;
+}
+
+static int lan78xx_read_otp_mac(unsigned char *enetaddr,
+                               struct usb_device *udev)
+{
+       int ret;
+
+       memset(enetaddr, 0, 6);
+
+       ret = lan78xx_read_otp(udev,
+                              EEPROM_MAC_OFFSET,
+                              ETH_ALEN,
+                              enetaddr);
+       if (!ret && is_valid_ethaddr(enetaddr)) {
+               /* eeprom values are valid so use them */
+               debug("MAC address read from OTP %pM\n", enetaddr);
+               return 0;
+       }
+       debug("MAC address read from OTP invalid %pM\n", enetaddr);
+
+       memset(enetaddr, 0, 6);
+       return -EINVAL;
+}
+
+static int lan78xx_update_flowcontrol(struct usb_device *udev,
+                                     struct ueth_data *dev)
+{
+       uint32_t flow = 0, fct_flow = 0;
+       int ret;
+
+       ret = lan7x_update_flowcontrol(udev, dev, &flow, &fct_flow);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN78XX_FCT_FLOW, fct_flow);
+       if (ret)
+               return ret;
+       return lan7x_write_reg(udev, FLOW, flow);
+}
+
+static int lan78xx_read_mac(unsigned char *enetaddr,
+                           struct usb_device *udev,
+                           struct lan7x_private *priv)
+{
+       u32 val;
+       int ret;
+       int saved = 0, done = 0;
+
+       /*
+        * Depends on chip, some EEPROM pins are muxed with LED function.
+        * disable & restore LED function to access EEPROM.
+        */
+       if ((priv->chipid == ID_REV_CHIP_ID_7800) ||
+           (priv->chipid == ID_REV_CHIP_ID_7850)) {
+               ret = lan7x_read_reg(udev, HW_CFG, &val);
+               if (ret)
+                       return ret;
+               saved = val;
+               val &= ~(LAN78XX_HW_CFG_LED1_EN | LAN78XX_HW_CFG_LED0_EN);
+               ret = lan7x_write_reg(udev, HW_CFG, val);
+               if (ret)
+                       goto restore;
+       }
+
+       /*
+        * Refer to the doc/README.enetaddr and doc/README.usb for
+        * the U-Boot MAC address policy
+        */
+       /* try reading mac address from EEPROM, then from OTP */
+       ret = lan7x_read_eeprom_mac(enetaddr, udev);
+       if (!ret)
+               done = 1;
+
+restore:
+       if ((priv->chipid == ID_REV_CHIP_ID_7800) ||
+           (priv->chipid == ID_REV_CHIP_ID_7850)) {
+               ret = lan7x_write_reg(udev, HW_CFG, saved);
+               if (ret)
+                       return ret;
+       }
+       /* if the EEPROM mac address is good, then exit */
+       if (done)
+               return 0;
+
+       /* try reading mac address from OTP if the device is LAN78xx */
+       return lan78xx_read_otp_mac(enetaddr, udev);
+}
+
+static int lan78xx_set_receive_filter(struct usb_device *udev)
+{
+       /* No multicast in u-boot for now */
+       return lan7x_write_reg(udev, LAN78XX_RFE_CTL,
+                              RFE_CTL_BCAST_EN | RFE_CTL_DA_PERFECT);
+}
+
+/* starts the TX path */
+static void lan78xx_start_tx_path(struct usb_device *udev)
+{
+       /* Enable Tx at MAC */
+       lan7x_write_reg(udev, MAC_TX, MAC_TX_TXEN);
+
+       /* Enable Tx at SCSRs */
+       lan7x_write_reg(udev, LAN78XX_FCT_TX_CTL, FCT_TX_CTL_EN);
+}
+
+/* Starts the Receive path */
+static void lan78xx_start_rx_path(struct usb_device *udev)
+{
+       /* Enable Rx at MAC */
+       lan7x_write_reg(udev, MAC_RX,
+                       LAN7X_MAC_RX_MAX_SIZE_DEFAULT |
+                       MAC_RX_FCS_STRIP | MAC_RX_RXEN);
+
+       /* Enable Rx at SCSRs */
+       lan7x_write_reg(udev, LAN78XX_FCT_RX_CTL, FCT_RX_CTL_EN);
+}
+
+static int lan78xx_basic_reset(struct usb_device *udev,
+                              struct ueth_data *dev,
+                              struct lan7x_private *priv)
+{
+       int ret;
+       u32 val;
+
+       ret = lan7x_basic_reset(udev, dev);
+       if (ret)
+               return ret;
+
+       /* Keep the chip ID */
+       ret = lan7x_read_reg(udev, ID_REV, &val);
+       if (ret)
+               return ret;
+       debug("LAN78xx ID_REV = 0x%08x\n", val);
+
+       priv->chipid = (val & ID_REV_CHIP_ID_MASK) >> 16;
+
+       /* Respond to the IN token with a NAK */
+       ret = lan7x_read_reg(udev, LAN78XX_USB_CFG0, &val);
+       if (ret)
+               return ret;
+       val |= LAN78XX_USB_CFG0_BIR;
+       return lan7x_write_reg(udev, LAN78XX_USB_CFG0, val);
+}
+
+int lan78xx_write_hwaddr(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct eth_pdata *pdata = dev_get_platdata(dev);
+       unsigned char *enetaddr = pdata->enetaddr;
+       u32 addr_lo = get_unaligned_le32(&enetaddr[0]);
+       u32 addr_hi = (u32)get_unaligned_le16(&enetaddr[4]);
+       int ret;
+
+       /* set hardware address */
+       ret = lan7x_write_reg(udev, RX_ADDRL, addr_lo);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, RX_ADDRH, addr_hi);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN78XX_MAF_LO(0), addr_lo);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN78XX_MAF_HI(0),
+                             addr_hi | LAN78XX_MAF_HI_VALID);
+       if (ret)
+               return ret;
+
+       debug("MAC addr %pM written\n", enetaddr);
+
+       return 0;
+}
+
+static int lan78xx_eth_start(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct lan7x_private *priv = dev_get_priv(dev);
+
+       int ret;
+       u32 write_buf;
+
+       /* Reset and read Mac addr were done in probe() */
+       ret = lan78xx_write_hwaddr(dev);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN78XX_BURST_CAP, 0);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN78XX_BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, INT_STS, 0xFFFFFFFF);
+       if (ret)
+               return ret;
+
+       /* set FIFO sizes */
+       ret = lan7x_write_reg(udev, LAN78XX_FCT_RX_FIFO_END,
+                             (MAX_RX_FIFO_SIZE - 512) / 512);
+       if (ret)
+               return ret;
+
+       ret = lan7x_write_reg(udev, LAN78XX_FCT_TX_FIFO_END,
+                             (MAX_TX_FIFO_SIZE - 512) / 512);
+       if (ret)
+               return ret;
+
+       /* Init Tx */
+       ret = lan7x_write_reg(udev, FLOW, 0);
+       if (ret)
+               return ret;
+
+       /* Init Rx. Set Vlan, keep default for VLAN on 78xx */
+       ret = lan78xx_set_receive_filter(udev);
+       if (ret)
+               return ret;
+
+       /* Init PHY, autonego, and link */
+       ret = lan7x_eth_phylib_connect(dev, &priv->ueth);
+       if (ret)
+               return ret;
+       ret = lan7x_eth_phylib_config_start(dev);
+       if (ret)
+               return ret;
+
+       /*
+        * MAC_CR has to be set after PHY init.
+        * MAC will auto detect the PHY speed.
+        */
+       ret = lan7x_read_reg(udev, MAC_CR, &write_buf);
+       if (ret)
+               return ret;
+       write_buf |= MAC_CR_AUTO_DUPLEX | MAC_CR_AUTO_SPEED | MAC_CR_ADP;
+       ret = lan7x_write_reg(udev, MAC_CR, write_buf);
+       if (ret)
+               return ret;
+
+       lan78xx_start_tx_path(udev);
+       lan78xx_start_rx_path(udev);
+
+       return lan78xx_update_flowcontrol(udev, &priv->ueth);
+}
+
+int lan78xx_read_rom_hwaddr(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct eth_pdata *pdata = dev_get_platdata(dev);
+       struct lan7x_private *priv = dev_get_priv(dev);
+       int ret;
+
+       ret = lan78xx_read_mac(pdata->enetaddr, udev, priv);
+       if (ret)
+               memset(pdata->enetaddr, 0, 6);
+
+       return 0;
+}
+
+static int lan78xx_eth_probe(struct udevice *dev)
+{
+       struct usb_device *udev = dev_get_parent_priv(dev);
+       struct lan7x_private *priv = dev_get_priv(dev);
+       struct ueth_data *ueth = &priv->ueth;
+       struct eth_pdata *pdata = dev_get_platdata(dev);
+       int ret;
+
+       /* Do a reset in order to get the MAC address from HW */
+       if (lan78xx_basic_reset(udev, ueth, priv))
+               return 0;
+
+       /* Get the MAC address */
+       /*
+        * We must set the eth->enetaddr from HW because the upper layer
+        * will force to use the environmental var (usbethaddr) or random if
+        * there is no valid MAC address in eth->enetaddr.
+        */
+       lan78xx_read_mac(pdata->enetaddr, udev, priv);
+       /* Do not return 0 for not finding MAC addr in HW */
+
+       ret = usb_ether_register(dev, ueth, RX_URB_SIZE);
+       if (ret)
+               return ret;
+
+       /* Register phylib */
+       return lan7x_phylib_register(dev);
+}
+
+static const struct eth_ops lan78xx_eth_ops = {
+       .start  = lan78xx_eth_start,
+       .send   = lan7x_eth_send,
+       .recv   = lan7x_eth_recv,
+       .free_pkt = lan7x_free_pkt,
+       .stop   = lan7x_eth_stop,
+       .write_hwaddr = lan78xx_write_hwaddr,
+       .read_rom_hwaddr = lan78xx_read_rom_hwaddr,
+};
+
+U_BOOT_DRIVER(lan78xx_eth) = {
+       .name   = "lan78xx_eth",
+       .id     = UCLASS_ETH,
+       .probe  = lan78xx_eth_probe,
+       .remove = lan7x_eth_remove,
+       .ops    = &lan78xx_eth_ops,
+       .priv_auto_alloc_size = sizeof(struct lan7x_private),
+       .platdata_auto_alloc_size = sizeof(struct eth_pdata),
+};
+
+static const struct usb_device_id lan78xx_eth_id_table[] = {
+       { USB_DEVICE(0x0424, 0x7800) }, /* LAN7800 USB Ethernet */
+       { USB_DEVICE(0x0424, 0x7850) }, /* LAN7850 USB Ethernet */
+       { }             /* Terminating entry */
+};
+
+U_BOOT_USB_DEVICE(lan78xx_eth, lan78xx_eth_id_table);
diff --git a/drivers/usb/eth/lan7x.c b/drivers/usb/eth/lan7x.c
new file mode 100644 (file)
index 0000000..222d327
--- /dev/null
@@ -0,0 +1,499 @@
+/*
+ * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <dm.h>
+#include <malloc.h>
+#include <miiphy.h>
+#include <memalign.h>
+#include <usb.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include "usb_ether.h"
+#include "lan7x.h"
+
+/*
+ * Lan7x infrastructure commands
+ */
+int lan7x_write_reg(struct usb_device *udev, u32 index, u32 data)
+{
+       int len;
+       ALLOC_CACHE_ALIGN_BUFFER(u32, tmpbuf, 1);
+
+       cpu_to_le32s(&data);
+       tmpbuf[0] = data;
+
+       len = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+                             USB_VENDOR_REQUEST_WRITE_REGISTER,
+                             USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                             0, index, tmpbuf, sizeof(data),
+                             USB_CTRL_SET_TIMEOUT_MS);
+       if (len != sizeof(data)) {
+               debug("%s failed: index=%d, data=%d, len=%d",
+                     __func__, index, data, len);
+               return -EIO;
+       }
+       return 0;
+}
+
+int lan7x_read_reg(struct usb_device *udev, u32 index, u32 *data)
+{
+       int len;
+       ALLOC_CACHE_ALIGN_BUFFER(u32, tmpbuf, 1);
+
+       len = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+                             USB_VENDOR_REQUEST_READ_REGISTER,
+                             USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+                             0, index, tmpbuf, sizeof(*data),
+                             USB_CTRL_GET_TIMEOUT_MS);
+       *data = tmpbuf[0];
+       if (len != sizeof(*data)) {
+               debug("%s failed: index=%d, len=%d", __func__, index, len);
+               return -EIO;
+       }
+
+       le32_to_cpus(data);
+       return 0;
+}
+
+static int lan7x_phy_wait_not_busy(struct usb_device *udev)
+{
+       return lan7x_wait_for_bit(udev, __func__,
+                                 MII_ACC, MII_ACC_MII_BUSY,
+                                 false, 100, 0);
+}
+
+int lan7x_mdio_read(struct usb_device *udev, int phy_id, int idx)
+{
+       u32 val, addr;
+
+       /* confirm MII not busy */
+       if (lan7x_phy_wait_not_busy(udev)) {
+               debug("MII is busy in %s\n", __func__);
+               return -ETIMEDOUT;
+       }
+
+       /* set the address, index & direction (read from PHY) */
+       addr = (phy_id << 11) | (idx << 6) |
+               MII_ACC_MII_READ | MII_ACC_MII_BUSY;
+       lan7x_write_reg(udev, MII_ACC, addr);
+
+       if (lan7x_phy_wait_not_busy(udev)) {
+               debug("Timed out reading MII reg %02X\n", idx);
+               return -ETIMEDOUT;
+       }
+
+       lan7x_read_reg(udev, MII_DATA, &val);
+
+       return val & 0xFFFF;
+}
+
+void lan7x_mdio_write(struct usb_device *udev, int phy_id, int idx, int regval)
+{
+       u32 addr;
+
+       /* confirm MII not busy */
+       if (lan7x_phy_wait_not_busy(udev)) {
+               debug("MII is busy in %s\n", __func__);
+               return;
+       }
+
+       lan7x_write_reg(udev, MII_DATA, regval);
+
+       /* set the address, index & direction (write to PHY) */
+       addr = (phy_id << 11) | (idx << 6) |
+               MII_ACC_MII_WRITE | MII_ACC_MII_BUSY;
+       lan7x_write_reg(udev, MII_ACC, addr);
+
+       if (lan7x_phy_wait_not_busy(udev))
+               debug("Timed out writing MII reg %02X\n", idx);
+}
+
+/*
+ * Lan7x phylib wrappers
+ */
+static int lan7x_phylib_mdio_read(struct mii_dev *bus,
+                                 int addr, int devad, int reg)
+{
+       struct usb_device *udev = dev_get_parent_priv(bus->priv);
+
+       return lan7x_mdio_read(udev, addr, reg);
+}
+
+static int lan7x_phylib_mdio_write(struct mii_dev *bus,
+                                  int addr, int devad, int reg, u16 val)
+{
+       struct usb_device *udev = dev_get_parent_priv(bus->priv);
+
+       lan7x_mdio_write(udev, addr, reg, (int)val);
+
+       return 0;
+}
+
+/*
+ * Lan7x eeprom functions
+ */
+static int lan7x_eeprom_confirm_not_busy(struct usb_device *udev)
+{
+       return lan7x_wait_for_bit(udev, __func__,
+                                 E2P_CMD, E2P_CMD_EPC_BUSY,
+                                 false, 100, 0);
+}
+
+static int lan7x_wait_eeprom(struct usb_device *udev)
+{
+       return lan7x_wait_for_bit(udev, __func__,
+                                 E2P_CMD,
+                                 (E2P_CMD_EPC_BUSY | E2P_CMD_EPC_TIMEOUT),
+                                 false, 100, 0);
+}
+
+static int lan7x_read_eeprom(struct usb_device *udev,
+                            u32 offset, u32 length, u8 *data)
+{
+       u32 val;
+       int i, ret;
+
+       ret = lan7x_eeprom_confirm_not_busy(udev);
+       if (ret)
+               return ret;
+
+       for (i = 0; i < length; i++) {
+               val = E2P_CMD_EPC_BUSY | E2P_CMD_EPC_CMD_READ |
+                       (offset & E2P_CMD_EPC_ADDR_MASK);
+               lan7x_write_reg(udev, E2P_CMD, val);
+
+               ret = lan7x_wait_eeprom(udev);
+               if (ret)
+                       return ret;
+
+               lan7x_read_reg(udev, E2P_DATA, &val);
+               data[i] = val & 0xFF;
+               offset++;
+       }
+       return ret;
+}
+
+/*
+ * Lan7x phylib functions
+ */
+int lan7x_phylib_register(struct udevice *udev)
+{
+       struct usb_device *usbdev = dev_get_parent_priv(udev);
+       struct lan7x_private *priv = dev_get_priv(udev);
+       int ret;
+
+       priv->mdiobus = mdio_alloc();
+       if (!priv->mdiobus) {
+               printf("mdio_alloc failed\n");
+               return -ENOMEM;
+       }
+       priv->mdiobus->read = lan7x_phylib_mdio_read;
+       priv->mdiobus->write = lan7x_phylib_mdio_write;
+       sprintf(priv->mdiobus->name,
+               "lan7x_mdiobus-d%hu-p%hu", usbdev->devnum, usbdev->portnr);
+       priv->mdiobus->priv = (void *)udev;
+
+       ret = mdio_register(priv->mdiobus);
+       if (ret) {
+               printf("mdio_register failed\n");
+               free(priv->mdiobus);
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+int lan7x_eth_phylib_connect(struct udevice *udev, struct ueth_data *dev)
+{
+       struct lan7x_private *priv = dev_get_priv(udev);
+
+       priv->phydev = phy_connect(priv->mdiobus, dev->phy_id,
+                            udev, PHY_INTERFACE_MODE_MII);
+
+       if (!priv->phydev) {
+               printf("phy_connect failed\n");
+               return -ENODEV;
+       }
+       return 0;
+}
+
+int lan7x_eth_phylib_config_start(struct udevice *udev)
+{
+       struct lan7x_private *priv = dev_get_priv(udev);
+       int ret;
+
+       /* configure supported modes */
+       priv->phydev->supported = PHY_BASIC_FEATURES |
+                                 SUPPORTED_1000baseT_Full |
+                                 SUPPORTED_Pause |
+                                 SUPPORTED_Asym_Pause;
+
+       priv->phydev->advertising = ADVERTISED_10baseT_Half |
+                                   ADVERTISED_10baseT_Full |
+                                   ADVERTISED_100baseT_Half |
+                                   ADVERTISED_100baseT_Full |
+                                   ADVERTISED_1000baseT_Full |
+                                   ADVERTISED_Pause |
+                                   ADVERTISED_Asym_Pause |
+                                   ADVERTISED_Autoneg;
+
+       priv->phydev->autoneg = AUTONEG_ENABLE;
+
+       ret = genphy_config_aneg(priv->phydev);
+       if (ret) {
+               printf("genphy_config_aneg failed\n");
+               return ret;
+       }
+       ret = phy_startup(priv->phydev);
+       if (ret) {
+               printf("phy_startup failed\n");
+               return ret;
+       }
+
+       debug("** %s() speed %i duplex %i adv %X supp %X\n", __func__,
+             priv->phydev->speed, priv->phydev->duplex,
+             priv->phydev->advertising, priv->phydev->supported);
+
+       return 0;
+}
+
+int lan7x_update_flowcontrol(struct usb_device *udev,
+                            struct ueth_data *dev,
+                            uint32_t *flow, uint32_t *fct_flow)
+{
+       uint32_t lcladv, rmtadv;
+       u8 cap = 0;
+       struct lan7x_private *priv = dev_get_priv(udev->dev);
+
+       debug("** %s()\n", __func__);
+       debug("** %s() priv->phydev->speed %i duplex %i\n", __func__,
+             priv->phydev->speed, priv->phydev->duplex);
+
+       if (priv->phydev->duplex == DUPLEX_FULL) {
+               lcladv = lan7x_mdio_read(udev, dev->phy_id, MII_ADVERTISE);
+               rmtadv = lan7x_mdio_read(udev, dev->phy_id, MII_LPA);
+               cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
+
+               debug("TX Flow ");
+               if (cap & FLOW_CTRL_TX) {
+                       *flow = (FLOW_CR_TX_FCEN | 0xFFFF);
+                       /* set fct_flow thresholds to 20% and 80% */
+                       *fct_flow = ((MAX_RX_FIFO_SIZE * 2) / (10 * 512))
+                                       & 0x7FUL;
+                       *fct_flow <<= 8UL;
+                       *fct_flow |= ((MAX_RX_FIFO_SIZE * 8) / (10 * 512))
+                                       & 0x7FUL;
+                       debug("EN ");
+               } else {
+                       debug("DIS ");
+               }
+               debug("RX Flow ");
+               if (cap & FLOW_CTRL_RX) {
+                       *flow |= FLOW_CR_RX_FCEN;
+                       debug("EN");
+               } else {
+                       debug("DIS");
+               }
+       }
+       debug("\n");
+       return 0;
+}
+
+int lan7x_read_eeprom_mac(unsigned char *enetaddr, struct usb_device *udev)
+{
+       int ret;
+
+       memset(enetaddr, 0, 6);
+
+       ret = lan7x_read_eeprom(udev, 0, 1, enetaddr);
+
+       if ((ret == 0) && (enetaddr[0] == EEPROM_INDICATOR)) {
+               ret = lan7x_read_eeprom(udev,
+                                       EEPROM_MAC_OFFSET, ETH_ALEN,
+                                       enetaddr);
+               if ((ret == 0) && is_valid_ethaddr(enetaddr)) {
+                       /* eeprom values are valid so use them */
+                       debug("MAC address read from EEPROM %pM\n",
+                             enetaddr);
+                       return 0;
+               }
+       }
+       debug("MAC address read from EEPROM invalid %pM\n", enetaddr);
+
+       memset(enetaddr, 0, 6);
+       return -EINVAL;
+}
+
+int lan7x_pmt_phy_reset(struct usb_device *udev,
+                       struct ueth_data *dev)
+{
+       int ret;
+       u32 data;
+
+       ret = lan7x_read_reg(udev, PMT_CTL, &data);
+       if (ret)
+               return ret;
+       ret = lan7x_write_reg(udev, PMT_CTL, data | PMT_CTL_PHY_RST);
+       if (ret)
+               return ret;
+
+       /* for LAN7x, we need to check PMT_CTL_READY asserted */
+       ret = lan7x_wait_for_bit(udev, "PMT_CTL_PHY_RST",
+                                PMT_CTL, PMT_CTL_PHY_RST,
+                                false, 1000, 0); /* could take over 125mS */
+       if (ret)
+               return ret;
+
+       return lan7x_wait_for_bit(udev, "PMT_CTL_READY",
+                                PMT_CTL, PMT_CTL_READY,
+                                true, 1000, 0);
+}
+
+int lan7x_basic_reset(struct usb_device *udev,
+                     struct ueth_data *dev)
+{
+       int ret;
+
+       dev->phy_id = LAN7X_INTERNAL_PHY_ID; /* fixed phy id */
+
+       ret = lan7x_write_reg(udev, HW_CFG, HW_CFG_LRST);
+       if (ret)
+               return ret;
+
+       ret = lan7x_wait_for_bit(udev, "HW_CFG_LRST",
+                                HW_CFG, HW_CFG_LRST,
+                                false, 1000, 0);
+       if (ret)
+               return ret;
+
+       debug("USB devnum %d portnr %d\n", udev->devnum, udev->portnr);
+
+       return lan7x_pmt_phy_reset(udev, dev);
+}
+
+void lan7x_eth_stop(struct udevice *dev)
+{
+       debug("** %s()\n", __func__);
+}
+
+int lan7x_eth_send(struct udevice *dev, void *packet, int length)
+{
+       struct lan7x_private *priv = dev_get_priv(dev);
+       struct ueth_data *ueth = &priv->ueth;
+       int err;
+       int actual_len;
+       u32 tx_cmd_a;
+       u32 tx_cmd_b;
+       ALLOC_CACHE_ALIGN_BUFFER(unsigned char, msg,
+                                PKTSIZE + sizeof(tx_cmd_a) + sizeof(tx_cmd_b));
+
+       debug("** %s(), len %d, buf %#x\n", __func__, length,
+             (unsigned int)(ulong) msg);
+       if (length > PKTSIZE)
+               return -ENOSPC;
+
+       /* LAN7x disable all TX offload features for u-boot */
+       tx_cmd_a = (u32) (length & TX_CMD_A_LEN_MASK) | TX_CMD_A_FCS;
+       tx_cmd_b = 0;
+       cpu_to_le32s(&tx_cmd_a);
+       cpu_to_le32s(&tx_cmd_b);
+
+       /* prepend cmd_a and cmd_b */
+       memcpy(msg, &tx_cmd_a, sizeof(tx_cmd_a));
+       memcpy(msg + sizeof(tx_cmd_a), &tx_cmd_b, sizeof(tx_cmd_b));
+       memcpy(msg + sizeof(tx_cmd_a) + sizeof(tx_cmd_b), (void *)packet,
+              length);
+       err = usb_bulk_msg(ueth->pusb_dev,
+                          usb_sndbulkpipe(ueth->pusb_dev, ueth->ep_out),
+                          (void *)msg,
+                          length + sizeof(tx_cmd_a) +
+                          sizeof(tx_cmd_b),
+                          &actual_len, USB_BULK_SEND_TIMEOUT_MS);
+       debug("Tx: len = %u, actual = %u, err = %d\n",
+             (unsigned int)(length + sizeof(tx_cmd_a) + sizeof(tx_cmd_b)),
+             (unsigned int)actual_len, err);
+
+       return err;
+}
+
+int lan7x_eth_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+       struct lan7x_private *priv = dev_get_priv(dev);
+       struct ueth_data *ueth = &priv->ueth;
+       uint8_t *ptr;
+       int ret, len;
+       u32 packet_len = 0;
+       u32 rx_cmd_a = 0;
+
+       len = usb_ether_get_rx_bytes(ueth, &ptr);
+       debug("%s: first try, len=%d\n", __func__, len);
+       if (!len) {
+               if (!(flags & ETH_RECV_CHECK_DEVICE))
+                       return -EAGAIN;
+               ret = usb_ether_receive(ueth, RX_URB_SIZE);
+               if (ret == -EAGAIN)
+                       return ret;
+
+               len = usb_ether_get_rx_bytes(ueth, &ptr);
+               debug("%s: second try, len=%d\n", __func__, len);
+       }
+
+       /*
+        * 1st 4 bytes contain the length of the actual data plus error info.
+        * Extract data length.
+        */
+       if (len < sizeof(packet_len)) {
+               debug("Rx: incomplete packet length\n");
+               goto err;
+       }
+       memcpy(&rx_cmd_a, ptr, sizeof(rx_cmd_a));
+       le32_to_cpus(&rx_cmd_a);
+       if (rx_cmd_a & RX_CMD_A_RXE) {
+               debug("Rx: Error header=%#x", rx_cmd_a);
+               goto err;
+       }
+       packet_len = (u16) (rx_cmd_a & RX_CMD_A_LEN_MASK);
+
+       if (packet_len > len - sizeof(packet_len)) {
+               debug("Rx: too large packet: %d\n", packet_len);
+               goto err;
+       }
+
+       /*
+        * For LAN7x, the length in command A does not
+        * include command A, B, and C length.
+        * So use it as is.
+        */
+
+       *packetp = ptr + 10;
+       return packet_len;
+
+err:
+       usb_ether_advance_rxbuf(ueth, -1);
+       return -EINVAL;
+}
+
+int lan7x_free_pkt(struct udevice *dev, uchar *packet, int packet_len)
+{
+       struct lan7x_private *priv = dev_get_priv(dev);
+
+       packet_len = ALIGN(packet_len, 4);
+       usb_ether_advance_rxbuf(&priv->ueth, sizeof(u32) + packet_len);
+
+       return 0;
+}
+
+int lan7x_eth_remove(struct udevice *dev)
+{
+       struct lan7x_private *priv = dev_get_priv(dev);
+
+       debug("** %s()\n", __func__);
+       free(priv->phydev);
+       mdio_unregister(priv->mdiobus);
+       mdio_free(priv->mdiobus);
+
+       return 0;
+}
diff --git a/drivers/usb/eth/lan7x.h b/drivers/usb/eth/lan7x.h
new file mode 100644 (file)
index 0000000..4f4b3f8
--- /dev/null
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <console.h>
+#include <watchdog.h>
+
+/* USB Vendor Requests */
+#define USB_VENDOR_REQUEST_WRITE_REGISTER      0xA0
+#define USB_VENDOR_REQUEST_READ_REGISTER       0xA1
+#define USB_VENDOR_REQUEST_GET_STATS           0xA2
+
+/* Tx Command A */
+#define TX_CMD_A_FCS                   BIT(22)
+#define TX_CMD_A_LEN_MASK              0x000FFFFF
+
+/* Rx Command A */
+#define RX_CMD_A_RXE                   BIT(18)
+#define RX_CMD_A_LEN_MASK              0x00003FFF
+
+/* SCSRs */
+#define ID_REV                         0x00
+#define ID_REV_CHIP_ID_MASK            0xFFFF0000
+#define ID_REV_CHIP_ID_7500            0x7500
+#define ID_REV_CHIP_ID_7800            0x7800
+#define ID_REV_CHIP_ID_7850            0x7850
+
+#define INT_STS                                0x0C
+
+#define HW_CFG                         0x010
+#define HW_CFG_LRST                    BIT(1)
+
+#define PMT_CTL                                0x014
+#define PMT_CTL_PHY_PWRUP              BIT(10)
+#define PMT_CTL_READY                  BIT(7)
+#define PMT_CTL_PHY_RST                        BIT(4)
+
+#define E2P_CMD                                0x040
+#define E2P_CMD_EPC_BUSY               BIT(31)
+#define E2P_CMD_EPC_CMD_READ           0x00000000
+#define E2P_CMD_EPC_TIMEOUT            BIT(10)
+#define E2P_CMD_EPC_ADDR_MASK          0x000001FF
+
+#define E2P_DATA                       0x044
+
+#define RFE_CTL_BCAST_EN               BIT(10)
+#define RFE_CTL_DA_PERFECT             BIT(1)
+
+#define FCT_RX_CTL_EN                  BIT(31)
+
+#define FCT_TX_CTL_EN                  BIT(31)
+
+#define MAC_CR                         0x100
+#define MAC_CR_ADP                     BIT(13)
+#define MAC_CR_AUTO_DUPLEX             BIT(12)
+#define MAC_CR_AUTO_SPEED              BIT(11)
+
+#define MAC_RX                         0x104
+#define MAC_RX_FCS_STRIP               BIT(4)
+#define MAC_RX_RXEN                    BIT(0)
+
+#define MAC_TX                         0x108
+#define MAC_TX_TXEN                    BIT(0)
+
+#define FLOW                           0x10C
+#define FLOW_CR_TX_FCEN                        BIT(30)
+#define FLOW_CR_RX_FCEN                        BIT(29)
+
+#define RX_ADDRH                       0x118
+#define RX_ADDRL                       0x11C
+
+#define MII_ACC                                0x120
+#define MII_ACC_MII_READ               0x00000000
+#define MII_ACC_MII_WRITE              0x00000002
+#define MII_ACC_MII_BUSY               BIT(0)
+
+#define MII_DATA                       0x124
+
+#define SS_USB_PKT_SIZE                        1024
+#define HS_USB_PKT_SIZE                        512
+#define FS_USB_PKT_SIZE                        64
+
+#define MAX_RX_FIFO_SIZE               (12 * 1024)
+#define MAX_TX_FIFO_SIZE               (12 * 1024)
+#define DEFAULT_BULK_IN_DELAY          0x0800
+
+#define EEPROM_INDICATOR               0xA5
+#define EEPROM_MAC_OFFSET              0x01
+
+/* Some extra defines */
+#define LAN7X_INTERNAL_PHY_ID          1
+
+#define LAN7X_MAC_RX_MAX_SIZE(mtu) \
+       ((mtu) << 16)                   /* Max frame size */
+#define LAN7X_MAC_RX_MAX_SIZE_DEFAULT \
+       LAN7X_MAC_RX_MAX_SIZE(ETH_FRAME_LEN + 4 /* VLAN */ + 4 /* CRC */)
+
+/* Timeouts */
+#define USB_CTRL_SET_TIMEOUT_MS                5000
+#define USB_CTRL_GET_TIMEOUT_MS                5000
+#define USB_BULK_SEND_TIMEOUT_MS       5000
+#define USB_BULK_RECV_TIMEOUT_MS       5000
+#define TIMEOUT_RESOLUTION_MS          50
+#define PHY_CONNECT_TIMEOUT_MS         5000
+
+#define RX_URB_SIZE    2048
+
+/* driver private */
+struct lan7x_private {
+       struct ueth_data ueth;
+       u32 chipid;             /* Chip or device ID */
+       struct mii_dev *mdiobus;
+       struct phy_device *phydev;
+};
+
+/*
+ * Lan7x infrastructure commands
+ */
+
+int lan7x_write_reg(struct usb_device *udev, u32 index, u32 data);
+
+int lan7x_read_reg(struct usb_device *udev, u32 index, u32 *data);
+
+static inline int lan7x_wait_for_bit(struct usb_device *udev,
+                                    const char *prefix, const u32 reg,
+                                    const u32 mask, const bool set,
+                                    const unsigned int timeout_ms,
+                                    const bool breakable)
+{
+       u32 val;
+       unsigned long start = get_timer(0);
+
+       while (1) {
+               lan7x_read_reg(udev, reg, &val);
+
+               if (!set)
+                       val = ~val;
+
+               if ((val & mask) == mask)
+                       return 0;
+
+               if (get_timer(start) > timeout_ms)
+                       break;
+
+               if (breakable && ctrlc()) {
+                       puts("Abort\n");
+                       return -EINTR;
+               }
+
+               udelay(1);
+               WATCHDOG_RESET();
+       }
+
+       debug("%s: Timeout (reg=0x%x mask=%08x wait_set=%i)\n", prefix, reg,
+             mask, set);
+
+       return -ETIMEDOUT;
+}
+
+int lan7x_mdio_read(struct usb_device *udev, int phy_id, int idx);
+
+void lan7x_mdio_write(struct usb_device *udev, int phy_id, int idx,
+                     int regval);
+
+static inline int lan7x_mdio_wait_for_bit(struct usb_device *udev,
+                                         const char *prefix,
+                                         int phy_id, const u32 reg,
+                                         const u32 mask, const bool set,
+                                         const unsigned int timeout_ms,
+                                         const bool breakable)
+{
+       u32 val;
+       unsigned long start = get_timer(0);
+
+       while (1) {
+               val = lan7x_mdio_read(udev, phy_id, reg);
+
+               if (!set)
+                       val = ~val;
+
+               if ((val & mask) == mask)
+                       return 0;
+
+               if (get_timer(start) > timeout_ms)
+                       break;
+
+               if (breakable && ctrlc()) {
+                       puts("Abort\n");
+                       return -EINTR;
+               }
+
+               udelay(1);
+               WATCHDOG_RESET();
+       }
+
+       debug("%s: Timeout (reg=0x%x mask=%08x wait_set=%i)\n", prefix, reg,
+             mask, set);
+
+       return -ETIMEDOUT;
+}
+
+int lan7x_phylib_register(struct udevice *udev);
+
+int lan7x_eth_phylib_connect(struct udevice *udev, struct ueth_data *dev);
+
+int lan7x_eth_phylib_config_start(struct udevice *udev);
+
+int lan7x_pmt_phy_reset(struct usb_device *udev,
+                       struct ueth_data *dev);
+
+int lan7x_update_flowcontrol(struct usb_device *udev,
+                            struct ueth_data *dev,
+                            uint32_t *flow, uint32_t *fct_flow);
+
+int lan7x_read_eeprom_mac(unsigned char *enetaddr, struct usb_device *udev);
+
+int lan7x_basic_reset(struct usb_device *udev,
+                     struct ueth_data *dev);
+
+void lan7x_eth_stop(struct udevice *dev);
+
+int lan7x_eth_send(struct udevice *dev, void *packet, int length);
+
+int lan7x_eth_recv(struct udevice *dev, int flags, uchar **packetp);
+
+int lan7x_free_pkt(struct udevice *dev, uchar *packet, int packet_len);
+
+int lan7x_eth_remove(struct udevice *dev);