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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
- */
- #include <dm.h>
- #include <log.h>
- #include <net.h>
- #include <usb.h>
- #include <linux/bitops.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);
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