/* * Faraday FTMAC100 Ethernet * * (C) Copyright 2009 Faraday Technology * Po-Yu Chuang <ratbert@faraday-tech.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #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 { volatile struct ftmac100_txdes txdes[1]; volatile 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; volatile struct ftmac100_txdes *txdes = priv->txdes; volatile 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)NetRxPackets[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; volatile 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. */ NetReceive ((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, volatile void *packet, int length) { struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase; struct ftmac100_data *priv = dev->priv; volatile struct ftmac100_txdes *curr_des = priv->txdes; int tmo; 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 */ tmo = get_timer (0) + 5 * CONFIG_SYS_HZ; while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) { if (get_timer (0) >= tmo) { 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; }