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/*
* Faraday FTMAC100 Ethernet
*
* (C) Copyright 2009 Faraday Technology
* Po-Yu Chuang <ratbert@faraday-tech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <asm/io.h>
#include "ftmac100.h"
#define ETH_ZLEN 60
struct ftmac100_data {
struct ftmac100_txdes txdes[1];
struct ftmac100_rxdes rxdes[PKTBUFSRX];
int rx_index;
};
/*
* Reset MAC
*/
static void ftmac100_reset (struct eth_device *dev)
{
struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
debug ("%s()\n", __func__);
writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr);
while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST)
;
}
/*
* Set MAC address
*/
static void ftmac100_set_mac (struct eth_device *dev, const unsigned char *mac)
{
struct ftmac100 *ftmac100 = (struct ftmac100 *)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, &ftmac100->mac_madr);
writel (laddr, &ftmac100->mac_ladr);
}
static void ftmac100_set_mac_from_env (struct eth_device *dev)
{
eth_getenv_enetaddr ("ethaddr", dev->enetaddr);
ftmac100_set_mac (dev, dev->enetaddr);
}
/*
* disable transmitter, receiver
*/
static void ftmac100_halt (struct eth_device *dev)
{
struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
debug ("%s()\n", __func__);
writel (0, &ftmac100->maccr);
}
static int ftmac100_init (struct eth_device *dev, bd_t *bd)
{
struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
struct ftmac100_data *priv = dev->priv;
struct ftmac100_txdes *txdes = priv->txdes;
struct ftmac100_rxdes *rxdes = priv->rxdes;
unsigned int maccr;
int i;
debug ("%s()\n", __func__);
ftmac100_reset (dev);
/* set the ethernet address */
ftmac100_set_mac_from_env (dev);
/* disable all interrupts */
writel (0, &ftmac100->imr);
/* initialize descriptors */
priv->rx_index = 0;
txdes[0].txdes1 = FTMAC100_TXDES1_EDOTR;
rxdes[PKTBUFSRX - 1].rxdes1 = FTMAC100_RXDES1_EDORR;
for (i = 0; i < PKTBUFSRX; i++) {
/* RXBUF_BADR */
rxdes[i].rxdes2 = (unsigned int)net_rx_packets[i];
rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN);
rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN;
}
/* transmit ring */
writel ((unsigned int)txdes, &ftmac100->txr_badr);
/* receive ring */
writel ((unsigned int)rxdes, &ftmac100->rxr_badr);
/* poll receive descriptor automatically */
writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc);
/* enable transmitter, receiver */
maccr = FTMAC100_MACCR_XMT_EN |
FTMAC100_MACCR_RCV_EN |
FTMAC100_MACCR_XDMA_EN |
FTMAC100_MACCR_RDMA_EN |
FTMAC100_MACCR_CRC_APD |
FTMAC100_MACCR_ENRX_IN_HALFTX |
FTMAC100_MACCR_RX_RUNT |
FTMAC100_MACCR_RX_BROADPKT;
writel (maccr, &ftmac100->maccr);
return 0;
}
/*
* Get a data block via Ethernet
*/
static int ftmac100_recv (struct eth_device *dev)
{
struct ftmac100_data *priv = dev->priv;
struct ftmac100_rxdes *curr_des;
unsigned short rxlen;
curr_des = &priv->rxdes[priv->rx_index];
if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN)
return -1;
if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR |
FTMAC100_RXDES0_CRC_ERR |
FTMAC100_RXDES0_FTL |
FTMAC100_RXDES0_RUNT |
FTMAC100_RXDES0_RX_ODD_NB)) {
return -1;
}
rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0);
debug ("%s(): RX buffer %d, %x received\n",
__func__, priv->rx_index, rxlen);
/* pass the packet up to the protocol layers. */
net_process_received_packet((void *)curr_des->rxdes2, rxlen);
/* release buffer to DMA */
curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN;
priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
return 0;
}
/*
* Send a data block via Ethernet
*/
static int ftmac100_send(struct eth_device *dev, void *packet, int length)
{
struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase;
struct ftmac100_data *priv = dev->priv;
struct ftmac100_txdes *curr_des = priv->txdes;
ulong start;
if (curr_des->txdes0 & FTMAC100_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;
/* initiate a transmit sequence */
curr_des->txdes2 = (unsigned int)packet; /* TXBUF_BADR */
curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
FTMAC100_TXDES1_LTS |
FTMAC100_TXDES1_TXBUF_SIZE (length);
curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
/* start transmit */
writel (1, &ftmac100->txpd);
/* wait for transfer to succeed */
start = get_timer(0);
while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
if (get_timer(start) >= 5) {
debug ("%s(): timed out\n", __func__);
return -1;
}
}
debug ("%s(): packet sent\n", __func__);
return 0;
}
int ftmac100_initialize (bd_t *bd)
{
struct eth_device *dev;
struct ftmac100_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 ftmac100_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, "FTMAC100");
dev->iobase = CONFIG_FTMAC100_BASE;
dev->init = ftmac100_init;
dev->halt = ftmac100_halt;
dev->send = ftmac100_send;
dev->recv = ftmac100_recv;
dev->priv = priv;
eth_register (dev);
return 1;
free_dev:
free (dev);
out:
return 0;
}
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