diff options
Diffstat (limited to 'drivers/net/ftmac100.c')
| -rw-r--r-- | drivers/net/ftmac100.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/net/ftmac100.c b/drivers/net/ftmac100.c new file mode 100644 index 0000000..2328cb5 --- /dev/null +++ b/drivers/net/ftmac100.c @@ -0,0 +1,278 @@ +/* + * 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; +} |