mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 06:42:56 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
314 lines
7.4 KiB
C
314 lines
7.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2017 Microchip Technology Inc. All rights reserved.
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*/
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#include <dm.h>
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#include <usb.h>
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#include <linux/mii.h>
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#include "usb_ether.h"
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#include "lan7x.h"
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/* LAN75xx specific register/bit defines */
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#define LAN75XX_HW_CFG_BIR BIT(7)
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#define LAN75XX_BURST_CAP 0x034
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#define LAN75XX_BULK_IN_DLY 0x03C
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#define LAN75XX_RFE_CTL 0x060
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#define LAN75XX_FCT_RX_CTL 0x090
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#define LAN75XX_FCT_TX_CTL 0x094
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#define LAN75XX_FCT_RX_FIFO_END 0x098
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#define LAN75XX_FCT_TX_FIFO_END 0x09C
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#define LAN75XX_FCT_FLOW 0x0A0
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/* MAC ADDRESS PERFECT FILTER For LAN75xx */
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#define LAN75XX_ADDR_FILTX 0x300
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#define LAN75XX_ADDR_FILTX_FB_VALID BIT(31)
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/*
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* Lan75xx infrastructure commands
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*/
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static int lan75xx_phy_gig_workaround(struct usb_device *udev,
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struct ueth_data *dev)
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{
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int ret = 0;
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/* Only internal phy */
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/* Set the phy in Gig loopback */
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lan7x_mdio_write(udev, dev->phy_id, MII_BMCR,
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(BMCR_LOOPBACK | BMCR_SPEED1000));
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/* Wait for the link up */
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ret = lan7x_mdio_wait_for_bit(udev, "BMSR_LSTATUS",
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dev->phy_id, MII_BMSR, BMSR_LSTATUS,
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true, PHY_CONNECT_TIMEOUT_MS, 1);
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if (ret)
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return ret;
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/* phy reset */
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return lan7x_pmt_phy_reset(udev, dev);
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}
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static int lan75xx_update_flowcontrol(struct usb_device *udev,
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struct ueth_data *dev)
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{
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uint32_t flow = 0, fct_flow = 0;
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int ret;
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ret = lan7x_update_flowcontrol(udev, dev, &flow, &fct_flow);
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if (ret)
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return ret;
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ret = lan7x_write_reg(udev, LAN75XX_FCT_FLOW, fct_flow);
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if (ret)
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return ret;
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return lan7x_write_reg(udev, FLOW, flow);
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}
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static int lan75xx_set_receive_filter(struct usb_device *udev)
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{
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/* No multicast in u-boot */
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return lan7x_write_reg(udev, LAN75XX_RFE_CTL,
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RFE_CTL_BCAST_EN | RFE_CTL_DA_PERFECT);
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}
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/* starts the TX path */
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static void lan75xx_start_tx_path(struct usb_device *udev)
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{
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/* Enable Tx at MAC */
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lan7x_write_reg(udev, MAC_TX, MAC_TX_TXEN);
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/* Enable Tx at SCSRs */
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lan7x_write_reg(udev, LAN75XX_FCT_TX_CTL, FCT_TX_CTL_EN);
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}
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/* Starts the Receive path */
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static void lan75xx_start_rx_path(struct usb_device *udev)
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{
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/* Enable Rx at MAC */
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lan7x_write_reg(udev, MAC_RX,
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LAN7X_MAC_RX_MAX_SIZE_DEFAULT |
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MAC_RX_FCS_STRIP | MAC_RX_RXEN);
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/* Enable Rx at SCSRs */
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lan7x_write_reg(udev, LAN75XX_FCT_RX_CTL, FCT_RX_CTL_EN);
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}
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static int lan75xx_basic_reset(struct usb_device *udev,
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struct ueth_data *dev,
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struct lan7x_private *priv)
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{
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int ret;
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u32 val;
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ret = lan7x_basic_reset(udev, dev);
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if (ret)
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return ret;
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/* Keep the chip ID */
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ret = lan7x_read_reg(udev, ID_REV, &val);
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if (ret)
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return ret;
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debug("LAN75xx ID_REV = 0x%08x\n", val);
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priv->chipid = (val & ID_REV_CHIP_ID_MASK) >> 16;
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/* Respond to the IN token with a NAK */
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ret = lan7x_read_reg(udev, HW_CFG, &val);
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if (ret)
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return ret;
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val |= LAN75XX_HW_CFG_BIR;
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return lan7x_write_reg(udev, HW_CFG, val);
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}
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int lan75xx_write_hwaddr(struct udevice *dev)
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{
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struct usb_device *udev = dev_get_parent_priv(dev);
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struct eth_pdata *pdata = dev_get_platdata(dev);
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unsigned char *enetaddr = pdata->enetaddr;
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u32 addr_lo = get_unaligned_le32(&enetaddr[0]);
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u32 addr_hi = (u32)get_unaligned_le16(&enetaddr[4]);
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int ret;
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/* set hardware address */
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ret = lan7x_write_reg(udev, RX_ADDRL, addr_lo);
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if (ret)
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return ret;
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ret = lan7x_write_reg(udev, RX_ADDRH, addr_hi);
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if (ret)
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return ret;
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ret = lan7x_write_reg(udev, LAN75XX_ADDR_FILTX + 4, addr_lo);
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if (ret)
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return ret;
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addr_hi |= LAN75XX_ADDR_FILTX_FB_VALID;
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ret = lan7x_write_reg(udev, LAN75XX_ADDR_FILTX, addr_hi);
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if (ret)
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return ret;
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debug("MAC addr %pM written\n", enetaddr);
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return 0;
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}
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static int lan75xx_eth_start(struct udevice *dev)
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{
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struct usb_device *udev = dev_get_parent_priv(dev);
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struct lan7x_private *priv = dev_get_priv(dev);
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struct ueth_data *ueth = &priv->ueth;
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int ret;
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u32 write_buf;
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/* Reset and read Mac addr were done in probe() */
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ret = lan75xx_write_hwaddr(dev);
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if (ret)
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return ret;
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ret = lan7x_write_reg(udev, INT_STS, 0xFFFFFFFF);
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if (ret)
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return ret;
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ret = lan7x_write_reg(udev, LAN75XX_BURST_CAP, 0);
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if (ret)
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return ret;
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ret = lan7x_write_reg(udev, LAN75XX_BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
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if (ret)
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return ret;
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/* set FIFO sizes */
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write_buf = (MAX_RX_FIFO_SIZE - 512) / 512;
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ret = lan7x_write_reg(udev, LAN75XX_FCT_RX_FIFO_END, write_buf);
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if (ret)
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return ret;
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write_buf = (MAX_TX_FIFO_SIZE - 512) / 512;
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ret = lan7x_write_reg(udev, LAN75XX_FCT_TX_FIFO_END, write_buf);
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if (ret)
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return ret;
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/* Init Tx */
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ret = lan7x_write_reg(udev, FLOW, 0);
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if (ret)
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return ret;
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/* Init Rx. Set Vlan, keep default for VLAN on 75xx */
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ret = lan75xx_set_receive_filter(udev);
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if (ret)
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return ret;
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/* phy workaround for gig link */
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ret = lan75xx_phy_gig_workaround(udev, ueth);
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if (ret)
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return ret;
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/* Init PHY, autonego, and link */
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ret = lan7x_eth_phylib_connect(dev, &priv->ueth);
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if (ret)
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return ret;
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ret = lan7x_eth_phylib_config_start(dev);
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if (ret)
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return ret;
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/*
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* MAC_CR has to be set after PHY init.
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* MAC will auto detect the PHY speed.
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*/
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ret = lan7x_read_reg(udev, MAC_CR, &write_buf);
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if (ret)
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return ret;
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write_buf |= MAC_CR_AUTO_DUPLEX | MAC_CR_AUTO_SPEED | MAC_CR_ADP;
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ret = lan7x_write_reg(udev, MAC_CR, write_buf);
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if (ret)
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return ret;
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lan75xx_start_tx_path(udev);
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lan75xx_start_rx_path(udev);
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return lan75xx_update_flowcontrol(udev, ueth);
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}
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int lan75xx_read_rom_hwaddr(struct udevice *dev)
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{
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struct usb_device *udev = dev_get_parent_priv(dev);
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struct eth_pdata *pdata = dev_get_platdata(dev);
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int ret;
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/*
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* Refer to the doc/README.enetaddr and doc/README.usb for
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* the U-Boot MAC address policy
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*/
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ret = lan7x_read_eeprom_mac(pdata->enetaddr, udev);
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if (ret)
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memset(pdata->enetaddr, 0, 6);
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return 0;
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}
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static int lan75xx_eth_probe(struct udevice *dev)
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{
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struct usb_device *udev = dev_get_parent_priv(dev);
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struct lan7x_private *priv = dev_get_priv(dev);
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struct ueth_data *ueth = &priv->ueth;
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struct eth_pdata *pdata = dev_get_platdata(dev);
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int ret;
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/* Do a reset in order to get the MAC address from HW */
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if (lan75xx_basic_reset(udev, ueth, priv))
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return 0;
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/* Get the MAC address */
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/*
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* We must set the eth->enetaddr from HW because the upper layer
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* will force to use the environmental var (usbethaddr) or random if
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* there is no valid MAC address in eth->enetaddr.
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*
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* Refer to the doc/README.enetaddr and doc/README.usb for
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* the U-Boot MAC address policy
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*/
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lan7x_read_eeprom_mac(pdata->enetaddr, udev);
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/* Do not return 0 for not finding MAC addr in HW */
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ret = usb_ether_register(dev, ueth, RX_URB_SIZE);
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if (ret)
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return ret;
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/* Register phylib */
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return lan7x_phylib_register(dev);
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}
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static const struct eth_ops lan75xx_eth_ops = {
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.start = lan75xx_eth_start,
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.send = lan7x_eth_send,
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.recv = lan7x_eth_recv,
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.free_pkt = lan7x_free_pkt,
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.stop = lan7x_eth_stop,
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.write_hwaddr = lan75xx_write_hwaddr,
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.read_rom_hwaddr = lan75xx_read_rom_hwaddr,
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};
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U_BOOT_DRIVER(lan75xx_eth) = {
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.name = "lan75xx_eth",
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.id = UCLASS_ETH,
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.probe = lan75xx_eth_probe,
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.remove = lan7x_eth_remove,
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.ops = &lan75xx_eth_ops,
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.priv_auto_alloc_size = sizeof(struct lan7x_private),
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.platdata_auto_alloc_size = sizeof(struct eth_pdata),
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};
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static const struct usb_device_id lan75xx_eth_id_table[] = {
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{ USB_DEVICE(0x0424, 0x7500) }, /* LAN7500 USB Ethernet */
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{ } /* Terminating entry */
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};
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U_BOOT_USB_DEVICE(lan75xx_eth, lan75xx_eth_id_table);
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