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* Faraday FTGMAC100 Ethernet
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* (C) Copyright 2009 Faraday Technology
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* Po-Yu Chuang <ratbert@faraday-tech.com>
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* (C) Copyright 2010 Andes Technology
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* Macpaul Lin <macpaul@andestech.com>
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* SPDX-License-Identifier: GPL-2.0+
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#include <asm/dma-mapping.h>
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#include <linux/mii.h>
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#include "ftgmac100.h"
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#define CFG_XBUF_SIZE 1536
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/* RBSR - hw default init value is also 0x640 */
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#define RBSR_DEFAULT_VALUE 0x640
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/* PKTBUFSTX/PKTBUFSRX must both be power of 2 */
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#define PKTBUFSTX 4 /* must be power of 2 */
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struct ftgmac100_data {
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struct ftgmac100_txdes *txdes;
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struct ftgmac100_rxdes *rxdes;
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* struct mii_bus functions
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static int ftgmac100_mdiobus_read(struct eth_device *dev, int phy_addr,
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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phycr = readl(&ftgmac100->phycr);
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/* preserve MDC cycle threshold */
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phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
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phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
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| FTGMAC100_PHYCR_REGAD(regnum)
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| FTGMAC100_PHYCR_MIIRD;
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writel(phycr, &ftgmac100->phycr);
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for (i = 0; i < 10; i++) {
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phycr = readl(&ftgmac100->phycr);
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if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
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data = readl(&ftgmac100->phydata);
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return FTGMAC100_PHYDATA_MIIRDATA(data);
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debug("mdio read timed out\n");
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static int ftgmac100_mdiobus_write(struct eth_device *dev, int phy_addr,
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int regnum, u16 value)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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phycr = readl(&ftgmac100->phycr);
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/* preserve MDC cycle threshold */
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phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
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phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
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| FTGMAC100_PHYCR_REGAD(regnum)
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| FTGMAC100_PHYCR_MIIWR;
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data = FTGMAC100_PHYDATA_MIIWDATA(value);
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writel(data, &ftgmac100->phydata);
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writel(phycr, &ftgmac100->phycr);
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for (i = 0; i < 10; i++) {
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phycr = readl(&ftgmac100->phycr);
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if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0) {
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debug("(phycr & FTGMAC100_PHYCR_MIIWR) == 0: " \
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"phy_addr: %x\n", phy_addr);
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debug("mdio write timed out\n");
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int ftgmac100_phy_read(struct eth_device *dev, int addr, int reg, u16 *value)
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*value = ftgmac100_mdiobus_read(dev , addr, reg);
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int ftgmac100_phy_write(struct eth_device *dev, int addr, int reg, u16 value)
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if (ftgmac100_mdiobus_write(dev, addr, reg, value) == -1)
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static int ftgmac100_phy_reset(struct eth_device *dev)
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struct ftgmac100_data *priv = dev->priv;
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adv = ADVERTISE_CSMA | ADVERTISE_ALL;
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ftgmac100_phy_write(dev, priv->phy_addr, MII_ADVERTISE, adv);
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printf("%s: Starting autonegotiation...\n", dev->name);
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ftgmac100_phy_write(dev, priv->phy_addr,
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MII_BMCR, (BMCR_ANENABLE | BMCR_ANRESTART));
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for (i = 0; i < 100000 / 100; i++) {
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ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
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if (status & BMSR_ANEGCOMPLETE)
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if (status & BMSR_ANEGCOMPLETE) {
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printf("%s: Autonegotiation complete\n", dev->name);
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printf("%s: Autonegotiation timed out (status=0x%04x)\n",
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static int ftgmac100_phy_init(struct eth_device *dev)
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struct ftgmac100_data *priv = dev->priv;
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u16 phy_id, status, adv, lpa, stat_ge;
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int media, speed, duplex;
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/* Check if the PHY is up to snuff... */
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for (phy_addr = 0; phy_addr < CONFIG_PHY_MAX_ADDR; phy_addr++) {
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ftgmac100_phy_read(dev, phy_addr, MII_PHYSID1, &phy_id);
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* When it is unable to found PHY,
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* the interface usually return 0xffff or 0x0000
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if (phy_id != 0xffff && phy_id != 0x0) {
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printf("%s: found PHY at 0x%02x\n",
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dev->name, phy_addr);
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priv->phy_addr = phy_addr;
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if (phy_id == 0xffff || phy_id == 0x0) {
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printf("%s: no PHY present\n", dev->name);
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ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
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if (!(status & BMSR_LSTATUS)) {
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/* Try to re-negotiate if we don't have link already. */
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ftgmac100_phy_reset(dev);
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for (i = 0; i < 100000 / 100; i++) {
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ftgmac100_phy_read(dev, priv->phy_addr,
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if (status & BMSR_LSTATUS)
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if (!(status & BMSR_LSTATUS)) {
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printf("%s: link down\n", dev->name);
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#ifdef CONFIG_FTGMAC100_EGIGA
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/* 1000 Base-T Status Register */
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ftgmac100_phy_read(dev, priv->phy_addr,
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MII_STAT1000, &stat_ge);
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speed = (stat_ge & (LPA_1000FULL | LPA_1000HALF)
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duplex = ((stat_ge & LPA_1000FULL)
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if (speed) { /* Speed is 1000 */
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printf("%s: link up, 1000bps %s-duplex\n",
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dev->name, duplex ? "full" : "half");
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ftgmac100_phy_read(dev, priv->phy_addr, MII_ADVERTISE, &adv);
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ftgmac100_phy_read(dev, priv->phy_addr, MII_LPA, &lpa);
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media = mii_nway_result(lpa & adv);
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speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 1 : 0);
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duplex = (media & ADVERTISE_FULL) ? 1 : 0;
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printf("%s: link up, %sMbps %s-duplex\n",
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dev->name, speed ? "100" : "10", duplex ? "full" : "half");
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static int ftgmac100_update_link_speed(struct eth_device *dev)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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struct ftgmac100_data *priv = dev->priv;
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unsigned short stat_fe;
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unsigned short stat_ge;
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#ifdef CONFIG_FTGMAC100_EGIGA
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/* 1000 Base-T Status Register */
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ftgmac100_phy_read(dev, priv->phy_addr, MII_STAT1000, &stat_ge);
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ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &stat_fe);
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if (!(stat_fe & BMSR_LSTATUS)) /* link status up? */
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/* read MAC control register and clear related bits */
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maccr = readl(&ftgmac100->maccr) &
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~(FTGMAC100_MACCR_GIGA_MODE |
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FTGMAC100_MACCR_FAST_MODE |
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FTGMAC100_MACCR_FULLDUP);
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#ifdef CONFIG_FTGMAC100_EGIGA
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if (stat_ge & LPA_1000FULL) {
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/* set gmac for 1000BaseTX and Full Duplex */
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maccr |= FTGMAC100_MACCR_GIGA_MODE | FTGMAC100_MACCR_FULLDUP;
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if (stat_ge & LPA_1000HALF) {
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/* set gmac for 1000BaseTX and Half Duplex */
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maccr |= FTGMAC100_MACCR_GIGA_MODE;
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if (stat_fe & BMSR_100FULL) {
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/* set MII for 100BaseTX and Full Duplex */
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maccr |= FTGMAC100_MACCR_FAST_MODE | FTGMAC100_MACCR_FULLDUP;
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if (stat_fe & BMSR_10FULL) {
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/* set MII for 10BaseT and Full Duplex */
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maccr |= FTGMAC100_MACCR_FULLDUP;
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if (stat_fe & BMSR_100HALF) {
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/* set MII for 100BaseTX and Half Duplex */
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maccr |= FTGMAC100_MACCR_FAST_MODE;
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if (stat_fe & BMSR_10HALF) {
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/* set MII for 10BaseT and Half Duplex */
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/* we have already clear these bits, do nothing */
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/* update MII config into maccr */
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writel(maccr, &ftgmac100->maccr);
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static void ftgmac100_reset(struct eth_device *dev)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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debug("%s()\n", __func__);
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writel(FTGMAC100_MACCR_SW_RST, &ftgmac100->maccr);
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while (readl(&ftgmac100->maccr) & FTGMAC100_MACCR_SW_RST)
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static void ftgmac100_set_mac(struct eth_device *dev,
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const unsigned char *mac)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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unsigned int maddr = mac[0] << 8 | mac[1];
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unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
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debug("%s(%x %x)\n", __func__, maddr, laddr);
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writel(maddr, &ftgmac100->mac_madr);
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writel(laddr, &ftgmac100->mac_ladr);
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static void ftgmac100_set_mac_from_env(struct eth_device *dev)
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eth_getenv_enetaddr("ethaddr", dev->enetaddr);
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ftgmac100_set_mac(dev, dev->enetaddr);
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* disable transmitter, receiver
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static void ftgmac100_halt(struct eth_device *dev)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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debug("%s()\n", __func__);
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writel(0, &ftgmac100->maccr);
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static int ftgmac100_init(struct eth_device *dev, bd_t *bd)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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struct ftgmac100_data *priv = dev->priv;
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struct ftgmac100_txdes *txdes;
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struct ftgmac100_rxdes *rxdes;
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debug("%s()\n", __func__);
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txdes = dma_alloc_coherent(
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sizeof(*txdes) * PKTBUFSTX, &priv->txdes_dma);
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panic("ftgmac100: out of memory\n");
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memset(txdes, 0, sizeof(*txdes) * PKTBUFSTX);
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rxdes = dma_alloc_coherent(
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sizeof(*rxdes) * PKTBUFSRX, &priv->rxdes_dma);
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panic("ftgmac100: out of memory\n");
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memset(rxdes, 0, sizeof(*rxdes) * PKTBUFSRX);
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/* set the ethernet address */
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ftgmac100_set_mac_from_env(dev);
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/* disable all interrupts */
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writel(0, &ftgmac100->ier);
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/* initialize descriptors */
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txdes[PKTBUFSTX - 1].txdes0 = FTGMAC100_TXDES0_EDOTR;
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rxdes[PKTBUFSRX - 1].rxdes0 = FTGMAC100_RXDES0_EDORR;
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for (i = 0; i < PKTBUFSTX; i++) {
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if (!txdes[i].txdes2) {
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buf = memalign(ARCH_DMA_MINALIGN, CFG_XBUF_SIZE);
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panic("ftgmac100: out of memory\n");
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txdes[i].txdes3 = virt_to_phys(buf);
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txdes[i].txdes2 = (uint)buf;
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for (i = 0; i < PKTBUFSRX; i++) {
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if (!rxdes[i].rxdes2) {
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buf = NetRxPackets[i];
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rxdes[i].rxdes3 = virt_to_phys(buf);
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rxdes[i].rxdes2 = (uint)buf;
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rxdes[i].rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
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writel(priv->txdes_dma, &ftgmac100->txr_badr);
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writel(priv->rxdes_dma, &ftgmac100->rxr_badr);
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/* poll receive descriptor automatically */
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writel(FTGMAC100_APTC_RXPOLL_CNT(1), &ftgmac100->aptc);
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/* config receive buffer size register */
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writel(FTGMAC100_RBSR_SIZE(RBSR_DEFAULT_VALUE), &ftgmac100->rbsr);
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/* enable transmitter, receiver */
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maccr = FTGMAC100_MACCR_TXMAC_EN |
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FTGMAC100_MACCR_RXMAC_EN |
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FTGMAC100_MACCR_TXDMA_EN |
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FTGMAC100_MACCR_RXDMA_EN |
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FTGMAC100_MACCR_CRC_APD |
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FTGMAC100_MACCR_FULLDUP |
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FTGMAC100_MACCR_RX_RUNT |
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FTGMAC100_MACCR_RX_BROADPKT;
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writel(maccr, &ftgmac100->maccr);
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if (!ftgmac100_phy_init(dev)) {
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if (!ftgmac100_update_link_speed(dev))
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* Get a data block via Ethernet
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static int ftgmac100_recv(struct eth_device *dev)
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struct ftgmac100_data *priv = dev->priv;
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struct ftgmac100_rxdes *curr_des;
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unsigned short rxlen;
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curr_des = &priv->rxdes[priv->rx_index];
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if (!(curr_des->rxdes0 & FTGMAC100_RXDES0_RXPKT_RDY))
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if (curr_des->rxdes0 & (FTGMAC100_RXDES0_RX_ERR |
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FTGMAC100_RXDES0_CRC_ERR |
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FTGMAC100_RXDES0_FTL |
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FTGMAC100_RXDES0_RUNT |
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FTGMAC100_RXDES0_RX_ODD_NB)) {
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rxlen = FTGMAC100_RXDES0_VDBC(curr_des->rxdes0);
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debug("%s(): RX buffer %d, %x received\n",
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__func__, priv->rx_index, rxlen);
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/* invalidate d-cache */
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dma_map_single((void *)curr_des->rxdes2, rxlen, DMA_FROM_DEVICE);
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/* pass the packet up to the protocol layers. */
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NetReceive((void *)curr_des->rxdes2, rxlen);
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/* release buffer to DMA */
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curr_des->rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
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priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
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* Send a data block via Ethernet
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static int ftgmac100_send(struct eth_device *dev, void *packet, int length)
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struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
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struct ftgmac100_data *priv = dev->priv;
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struct ftgmac100_txdes *curr_des = &priv->txdes[priv->tx_index];
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if (curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN) {
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debug("%s(): no TX descriptor available\n", __func__);
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debug("%s(%x, %x)\n", __func__, (int)packet, length);
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length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
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memcpy((void *)curr_des->txdes2, (void *)packet, length);
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dma_map_single((void *)curr_des->txdes2, length, DMA_TO_DEVICE);
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/* only one descriptor on TXBUF */
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curr_des->txdes0 &= FTGMAC100_TXDES0_EDOTR;
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curr_des->txdes0 |= FTGMAC100_TXDES0_FTS |
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FTGMAC100_TXDES0_LTS |
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FTGMAC100_TXDES0_TXBUF_SIZE(length) |
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FTGMAC100_TXDES0_TXDMA_OWN ;
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writel(1, &ftgmac100->txpd);
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debug("%s(): packet sent\n", __func__);
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priv->tx_index = (priv->tx_index + 1) % PKTBUFSTX;
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int ftgmac100_initialize(bd_t *bd)
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struct eth_device *dev;
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struct ftgmac100_data *priv;
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dev = malloc(sizeof *dev);
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printf("%s(): failed to allocate dev\n", __func__);
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/* Transmit and receive descriptors should align to 16 bytes */
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priv = memalign(16, sizeof(struct ftgmac100_data));
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printf("%s(): failed to allocate priv\n", __func__);
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memset(dev, 0, sizeof(*dev));
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memset(priv, 0, sizeof(*priv));
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sprintf(dev->name, "FTGMAC100");
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dev->iobase = CONFIG_FTGMAC100_BASE;
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dev->init = ftgmac100_init;
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dev->halt = ftgmac100_halt;
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dev->send = ftgmac100_send;
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dev->recv = ftgmac100_recv;
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ftgmac100_reset(dev);