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/*
* Faraday FTGMAC100 Ethernet
*
* (C) Copyright 2009 Faraday Technology
* Po-Yu Chuang <ratbert@faraday-tech.com>
*
* (C) Copyright 2010 Andes Technology
* Macpaul Lin <macpaul@andestech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <asm/io.h>
#include <asm/dma-mapping.h>
#include <linux/mii.h>
#include "ftgmac100.h"
#define ETH_ZLEN 60
#define CFG_XBUF_SIZE 1536
/* RBSR - hw default init value is also 0x640 */
#define RBSR_DEFAULT_VALUE 0x640
/* PKTBUFSTX/PKTBUFSRX must both be power of 2 */
#define PKTBUFSTX 4 /* must be power of 2 */
struct ftgmac100_data {
ulong txdes_dma;
struct ftgmac100_txdes *txdes;
ulong rxdes_dma;
struct ftgmac100_rxdes *rxdes;
int tx_index;
int rx_index;
int phy_addr;
};
/*
* struct mii_bus functions
*/
static int ftgmac100_mdiobus_read(struct eth_device *dev, int phy_addr,
int regnum)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
int phycr;
int i;
phycr = readl(&ftgmac100->phycr);
/* preserve MDC cycle threshold */
phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
| FTGMAC100_PHYCR_REGAD(regnum)
| FTGMAC100_PHYCR_MIIRD;
writel(phycr, &ftgmac100->phycr);
for (i = 0; i < 10; i++) {
phycr = readl(&ftgmac100->phycr);
if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
int data;
data = readl(&ftgmac100->phydata);
return FTGMAC100_PHYDATA_MIIRDATA(data);
}
mdelay(10);
}
debug("mdio read timed out\n");
return -1;
}
static int ftgmac100_mdiobus_write(struct eth_device *dev, int phy_addr,
int regnum, u16 value)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
int phycr;
int data;
int i;
phycr = readl(&ftgmac100->phycr);
/* preserve MDC cycle threshold */
phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr)
| FTGMAC100_PHYCR_REGAD(regnum)
| FTGMAC100_PHYCR_MIIWR;
data = FTGMAC100_PHYDATA_MIIWDATA(value);
writel(data, &ftgmac100->phydata);
writel(phycr, &ftgmac100->phycr);
for (i = 0; i < 10; i++) {
phycr = readl(&ftgmac100->phycr);
if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0) {
debug("(phycr & FTGMAC100_PHYCR_MIIWR) == 0: " \
"phy_addr: %x\n", phy_addr);
return 0;
}
mdelay(1);
}
debug("mdio write timed out\n");
return -1;
}
int ftgmac100_phy_read(struct eth_device *dev, int addr, int reg, u16 *value)
{
*value = ftgmac100_mdiobus_read(dev , addr, reg);
if (*value == -1)
return -1;
return 0;
}
int ftgmac100_phy_write(struct eth_device *dev, int addr, int reg, u16 value)
{
if (ftgmac100_mdiobus_write(dev, addr, reg, value) == -1)
return -1;
return 0;
}
static int ftgmac100_phy_reset(struct eth_device *dev)
{
struct ftgmac100_data *priv = dev->priv;
int i;
u16 status, adv;
adv = ADVERTISE_CSMA | ADVERTISE_ALL;
ftgmac100_phy_write(dev, priv->phy_addr, MII_ADVERTISE, adv);
printf("%s: Starting autonegotiation...\n", dev->name);
ftgmac100_phy_write(dev, priv->phy_addr,
MII_BMCR, (BMCR_ANENABLE | BMCR_ANRESTART));
for (i = 0; i < 100000 / 100; i++) {
ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
if (status & BMSR_ANEGCOMPLETE)
break;
mdelay(1);
}
if (status & BMSR_ANEGCOMPLETE) {
printf("%s: Autonegotiation complete\n", dev->name);
} else {
printf("%s: Autonegotiation timed out (status=0x%04x)\n",
dev->name, status);
return 0;
}
return 1;
}
static int ftgmac100_phy_init(struct eth_device *dev)
{
struct ftgmac100_data *priv = dev->priv;
int phy_addr;
u16 phy_id, status, adv, lpa, stat_ge;
int media, speed, duplex;
int i;
/* Check if the PHY is up to snuff... */
for (phy_addr = 0; phy_addr < CONFIG_PHY_MAX_ADDR; phy_addr++) {
ftgmac100_phy_read(dev, phy_addr, MII_PHYSID1, &phy_id);
/*
* When it is unable to found PHY,
* the interface usually return 0xffff or 0x0000
*/
if (phy_id != 0xffff && phy_id != 0x0) {
printf("%s: found PHY at 0x%02x\n",
dev->name, phy_addr);
priv->phy_addr = phy_addr;
break;
}
}
if (phy_id == 0xffff || phy_id == 0x0) {
printf("%s: no PHY present\n", dev->name);
return 0;
}
ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &status);
if (!(status & BMSR_LSTATUS)) {
/* Try to re-negotiate if we don't have link already. */
ftgmac100_phy_reset(dev);
for (i = 0; i < 100000 / 100; i++) {
ftgmac100_phy_read(dev, priv->phy_addr,
MII_BMSR, &status);
if (status & BMSR_LSTATUS)
break;
udelay(100);
}
}
if (!(status & BMSR_LSTATUS)) {
printf("%s: link down\n", dev->name);
return 0;
}
#ifdef CONFIG_FTGMAC100_EGIGA
/* 1000 Base-T Status Register */
ftgmac100_phy_read(dev, priv->phy_addr,
MII_STAT1000, &stat_ge);
speed = (stat_ge & (LPA_1000FULL | LPA_1000HALF)
? 1 : 0);
duplex = ((stat_ge & LPA_1000FULL)
? 1 : 0);
if (speed) { /* Speed is 1000 */
printf("%s: link up, 1000bps %s-duplex\n",
dev->name, duplex ? "full" : "half");
return 0;
}
#endif
ftgmac100_phy_read(dev, priv->phy_addr, MII_ADVERTISE, &adv);
ftgmac100_phy_read(dev, priv->phy_addr, MII_LPA, &lpa);
media = mii_nway_result(lpa & adv);
speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 1 : 0);
duplex = (media & ADVERTISE_FULL) ? 1 : 0;
printf("%s: link up, %sMbps %s-duplex\n",
dev->name, speed ? "100" : "10", duplex ? "full" : "half");
return 1;
}
static int ftgmac100_update_link_speed(struct eth_device *dev)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
struct ftgmac100_data *priv = dev->priv;
unsigned short stat_fe;
unsigned short stat_ge;
unsigned int maccr;
#ifdef CONFIG_FTGMAC100_EGIGA
/* 1000 Base-T Status Register */
ftgmac100_phy_read(dev, priv->phy_addr, MII_STAT1000, &stat_ge);
#endif
ftgmac100_phy_read(dev, priv->phy_addr, MII_BMSR, &stat_fe);
if (!(stat_fe & BMSR_LSTATUS)) /* link status up? */
return 0;
/* read MAC control register and clear related bits */
maccr = readl(&ftgmac100->maccr) &
~(FTGMAC100_MACCR_GIGA_MODE |
FTGMAC100_MACCR_FAST_MODE |
FTGMAC100_MACCR_FULLDUP);
#ifdef CONFIG_FTGMAC100_EGIGA
if (stat_ge & LPA_1000FULL) {
/* set gmac for 1000BaseTX and Full Duplex */
maccr |= FTGMAC100_MACCR_GIGA_MODE | FTGMAC100_MACCR_FULLDUP;
}
if (stat_ge & LPA_1000HALF) {
/* set gmac for 1000BaseTX and Half Duplex */
maccr |= FTGMAC100_MACCR_GIGA_MODE;
}
#endif
if (stat_fe & BMSR_100FULL) {
/* set MII for 100BaseTX and Full Duplex */
maccr |= FTGMAC100_MACCR_FAST_MODE | FTGMAC100_MACCR_FULLDUP;
}
if (stat_fe & BMSR_10FULL) {
/* set MII for 10BaseT and Full Duplex */
maccr |= FTGMAC100_MACCR_FULLDUP;
}
if (stat_fe & BMSR_100HALF) {
/* set MII for 100BaseTX and Half Duplex */
maccr |= FTGMAC100_MACCR_FAST_MODE;
}
if (stat_fe & BMSR_10HALF) {
/* set MII for 10BaseT and Half Duplex */
/* we have already clear these bits, do nothing */
;
}
/* update MII config into maccr */
writel(maccr, &ftgmac100->maccr);
return 1;
}
/*
* Reset MAC
*/
static void ftgmac100_reset(struct eth_device *dev)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
debug("%s()\n", __func__);
writel(FTGMAC100_MACCR_SW_RST, &ftgmac100->maccr);
while (readl(&ftgmac100->maccr) & FTGMAC100_MACCR_SW_RST)
;
}
/*
* Set MAC address
*/
static void ftgmac100_set_mac(struct eth_device *dev,
const unsigned char *mac)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
unsigned int maddr = mac[0] << 8 | mac[1];
unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
debug("%s(%x %x)\n", __func__, maddr, laddr);
writel(maddr, &ftgmac100->mac_madr);
writel(laddr, &ftgmac100->mac_ladr);
}
static void ftgmac100_set_mac_from_env(struct eth_device *dev)
{
eth_getenv_enetaddr("ethaddr", dev->enetaddr);
ftgmac100_set_mac(dev, dev->enetaddr);
}
/*
* disable transmitter, receiver
*/
static void ftgmac100_halt(struct eth_device *dev)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
debug("%s()\n", __func__);
writel(0, &ftgmac100->maccr);
}
static int ftgmac100_init(struct eth_device *dev, bd_t *bd)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
struct ftgmac100_data *priv = dev->priv;
struct ftgmac100_txdes *txdes;
struct ftgmac100_rxdes *rxdes;
unsigned int maccr;
void *buf;
int i;
debug("%s()\n", __func__);
if (!priv->txdes) {
txdes = dma_alloc_coherent(
sizeof(*txdes) * PKTBUFSTX, &priv->txdes_dma);
if (!txdes)
panic("ftgmac100: out of memory\n");
memset(txdes, 0, sizeof(*txdes) * PKTBUFSTX);
priv->txdes = txdes;
}
txdes = priv->txdes;
if (!priv->rxdes) {
rxdes = dma_alloc_coherent(
sizeof(*rxdes) * PKTBUFSRX, &priv->rxdes_dma);
if (!rxdes)
panic("ftgmac100: out of memory\n");
memset(rxdes, 0, sizeof(*rxdes) * PKTBUFSRX);
priv->rxdes = rxdes;
}
rxdes = priv->rxdes;
/* set the ethernet address */
ftgmac100_set_mac_from_env(dev);
/* disable all interrupts */
writel(0, &ftgmac100->ier);
/* initialize descriptors */
priv->tx_index = 0;
priv->rx_index = 0;
txdes[PKTBUFSTX - 1].txdes0 = FTGMAC100_TXDES0_EDOTR;
rxdes[PKTBUFSRX - 1].rxdes0 = FTGMAC100_RXDES0_EDORR;
for (i = 0; i < PKTBUFSTX; i++) {
/* TXBUF_BADR */
if (!txdes[i].txdes2) {
buf = memalign(ARCH_DMA_MINALIGN, CFG_XBUF_SIZE);
if (!buf)
panic("ftgmac100: out of memory\n");
txdes[i].txdes3 = virt_to_phys(buf);
txdes[i].txdes2 = (uint)buf;
}
txdes[i].txdes1 = 0;
}
for (i = 0; i < PKTBUFSRX; i++) {
/* RXBUF_BADR */
if (!rxdes[i].rxdes2) {
buf = NetRxPackets[i];
rxdes[i].rxdes3 = virt_to_phys(buf);
rxdes[i].rxdes2 = (uint)buf;
}
rxdes[i].rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
}
/* transmit ring */
writel(priv->txdes_dma, &ftgmac100->txr_badr);
/* receive ring */
writel(priv->rxdes_dma, &ftgmac100->rxr_badr);
/* poll receive descriptor automatically */
writel(FTGMAC100_APTC_RXPOLL_CNT(1), &ftgmac100->aptc);
/* config receive buffer size register */
writel(FTGMAC100_RBSR_SIZE(RBSR_DEFAULT_VALUE), &ftgmac100->rbsr);
/* enable transmitter, receiver */
maccr = FTGMAC100_MACCR_TXMAC_EN |
FTGMAC100_MACCR_RXMAC_EN |
FTGMAC100_MACCR_TXDMA_EN |
FTGMAC100_MACCR_RXDMA_EN |
FTGMAC100_MACCR_CRC_APD |
FTGMAC100_MACCR_FULLDUP |
FTGMAC100_MACCR_RX_RUNT |
FTGMAC100_MACCR_RX_BROADPKT;
writel(maccr, &ftgmac100->maccr);
if (!ftgmac100_phy_init(dev)) {
if (!ftgmac100_update_link_speed(dev))
return -1;
}
return 0;
}
/*
* Get a data block via Ethernet
*/
static int ftgmac100_recv(struct eth_device *dev)
{
struct ftgmac100_data *priv = dev->priv;
struct ftgmac100_rxdes *curr_des;
unsigned short rxlen;
curr_des = &priv->rxdes[priv->rx_index];
if (!(curr_des->rxdes0 & FTGMAC100_RXDES0_RXPKT_RDY))
return -1;
if (curr_des->rxdes0 & (FTGMAC100_RXDES0_RX_ERR |
FTGMAC100_RXDES0_CRC_ERR |
FTGMAC100_RXDES0_FTL |
FTGMAC100_RXDES0_RUNT |
FTGMAC100_RXDES0_RX_ODD_NB)) {
return -1;
}
rxlen = FTGMAC100_RXDES0_VDBC(curr_des->rxdes0);
debug("%s(): RX buffer %d, %x received\n",
__func__, priv->rx_index, rxlen);
/* invalidate d-cache */
dma_map_single((void *)curr_des->rxdes2, rxlen, DMA_FROM_DEVICE);
/* pass the packet up to the protocol layers. */
NetReceive((void *)curr_des->rxdes2, rxlen);
/* release buffer to DMA */
curr_des->rxdes0 &= ~FTGMAC100_RXDES0_RXPKT_RDY;
priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
return 0;
}
/*
* Send a data block via Ethernet
*/
static int ftgmac100_send(struct eth_device *dev, void *packet, int length)
{
struct ftgmac100 *ftgmac100 = (struct ftgmac100 *)dev->iobase;
struct ftgmac100_data *priv = dev->priv;
struct ftgmac100_txdes *curr_des = &priv->txdes[priv->tx_index];
if (curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN) {
debug("%s(): no TX descriptor available\n", __func__);
return -1;
}
debug("%s(%x, %x)\n", __func__, (int)packet, length);
length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
memcpy((void *)curr_des->txdes2, (void *)packet, length);
dma_map_single((void *)curr_des->txdes2, length, DMA_TO_DEVICE);
/* only one descriptor on TXBUF */
curr_des->txdes0 &= FTGMAC100_TXDES0_EDOTR;
curr_des->txdes0 |= FTGMAC100_TXDES0_FTS |
FTGMAC100_TXDES0_LTS |
FTGMAC100_TXDES0_TXBUF_SIZE(length) |
FTGMAC100_TXDES0_TXDMA_OWN ;
/* start transmit */
writel(1, &ftgmac100->txpd);
debug("%s(): packet sent\n", __func__);
priv->tx_index = (priv->tx_index + 1) % PKTBUFSTX;
return 0;
}
int ftgmac100_initialize(bd_t *bd)
{
struct eth_device *dev;
struct ftgmac100_data *priv;
dev = malloc(sizeof *dev);
if (!dev) {
printf("%s(): failed to allocate dev\n", __func__);
goto out;
}
/* Transmit and receive descriptors should align to 16 bytes */
priv = memalign(16, sizeof(struct ftgmac100_data));
if (!priv) {
printf("%s(): failed to allocate priv\n", __func__);
goto free_dev;
}
memset(dev, 0, sizeof(*dev));
memset(priv, 0, sizeof(*priv));
sprintf(dev->name, "FTGMAC100");
dev->iobase = CONFIG_FTGMAC100_BASE;
dev->init = ftgmac100_init;
dev->halt = ftgmac100_halt;
dev->send = ftgmac100_send;
dev->recv = ftgmac100_recv;
dev->priv = priv;
eth_register(dev);
ftgmac100_reset(dev);
return 1;
free_dev:
free(dev);
out:
return 0;
}