diff options
Diffstat (limited to 'drivers/net/ne2000_base.c')
| -rw-r--r-- | drivers/net/ne2000_base.c | 757 |
1 files changed, 757 insertions, 0 deletions
diff --git a/drivers/net/ne2000_base.c b/drivers/net/ne2000_base.c new file mode 100644 index 0000000..f93f932 --- /dev/null +++ b/drivers/net/ne2000_base.c @@ -0,0 +1,757 @@ +/* +Ported to U-Boot by Christian Pellegrin <chri@ascensit.com> + +Based on sources from the Linux kernel (pcnet_cs.c, 8390.h) and +eCOS(if_dp83902a.c, if_dp83902a.h). Both of these 2 wonderful world +are GPL, so this is, of course, GPL. + +========================================================================== + +dev/if_dp83902a.c + +Ethernet device driver for NS DP83902a ethernet controller + +========================================================================== +####ECOSGPLCOPYRIGHTBEGIN#### +------------------------------------------- +This file is part of eCos, the Embedded Configurable Operating System. +Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. + +eCos 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 or (at your option) any later version. + +eCos 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 eCos; if not, write to the Free Software Foundation, Inc., +59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + +As a special exception, if other files instantiate templates or use macros +or inline functions from this file, or you compile this file and link it +with other works to produce a work based on this file, this file does not +by itself cause the resulting work to be covered by the GNU General Public +License. However the source code for this file must still be made available +in accordance with section (3) of the GNU General Public License. + +This exception does not invalidate any other reasons why a work based on +this file might be covered by the GNU General Public License. + +Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. +at http://sources.redhat.com/ecos/ecos-license/ +------------------------------------------- +####ECOSGPLCOPYRIGHTEND#### +####BSDCOPYRIGHTBEGIN#### + +------------------------------------------- + +Portions of this software may have been derived from OpenBSD or other sources, +and are covered by the appropriate copyright disclaimers included herein. + +------------------------------------------- + +####BSDCOPYRIGHTEND#### +========================================================================== +#####DESCRIPTIONBEGIN#### + +Author(s): gthomas +Contributors: gthomas, jskov, rsandifo +Date: 2001-06-13 +Purpose: +Description: + +FIXME: Will fail if pinged with large packets (1520 bytes) +Add promisc config +Add SNMP + +####DESCRIPTIONEND#### + +========================================================================== +*/ + +#include <common.h> +#include <command.h> +#include <net.h> +#include <malloc.h> + +#define mdelay(n) udelay((n)*1000) +/* forward definition of function used for the uboot interface */ +void uboot_push_packet_len(int len); +void uboot_push_tx_done(int key, int val); + +/* NE2000 base header file */ +#include "ne2000_base.h" + +#if defined(CONFIG_DRIVER_AX88796L) +/* AX88796L support */ +#include "ax88796.h" +#else +/* Basic NE2000 chip support */ +#include "ne2000.h" +#endif + +static dp83902a_priv_data_t nic; /* just one instance of the card supported */ + +static bool +dp83902a_init(void) +{ + dp83902a_priv_data_t *dp = &nic; + u8* base; +#if defined(NE2000_BASIC_INIT) + int i; +#endif + + DEBUG_FUNCTION(); + + base = dp->base; + if (!base) + return false; /* No device found */ + + DEBUG_LINE(); + +#if defined(NE2000_BASIC_INIT) + /* AX88796L doesn't need */ + /* Prepare ESA */ + DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1); /* Select page 1 */ + /* Use the address from the serial EEPROM */ + for (i = 0; i < 6; i++) + DP_IN(base, DP_P1_PAR0+i, dp->esa[i]); + DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE0); /* Select page 0 */ + + printf("NE2000 - %s ESA: %02x:%02x:%02x:%02x:%02x:%02x\n", + "eeprom", + dp->esa[0], + dp->esa[1], + dp->esa[2], + dp->esa[3], + dp->esa[4], + dp->esa[5] ); + +#endif /* NE2000_BASIC_INIT */ + return true; +} + +static void +dp83902a_stop(void) +{ + dp83902a_priv_data_t *dp = &nic; + u8 *base = dp->base; + + DEBUG_FUNCTION(); + + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_STOP); /* Brutal */ + DP_OUT(base, DP_ISR, 0xFF); /* Clear any pending interrupts */ + DP_OUT(base, DP_IMR, 0x00); /* Disable all interrupts */ + + dp->running = false; +} + +/* + * This function is called to "start up" the interface. It may be called + * multiple times, even when the hardware is already running. It will be + * called whenever something "hardware oriented" changes and should leave + * the hardware ready to send/receive packets. + */ +static void +dp83902a_start(u8 * enaddr) +{ + dp83902a_priv_data_t *dp = &nic; + u8 *base = dp->base; + int i; + + DEBUG_FUNCTION(); + + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_STOP); /* Brutal */ + DP_OUT(base, DP_DCR, DP_DCR_INIT); + DP_OUT(base, DP_RBCH, 0); /* Remote byte count */ + DP_OUT(base, DP_RBCL, 0); + DP_OUT(base, DP_RCR, DP_RCR_MON); /* Accept no packets */ + DP_OUT(base, DP_TCR, DP_TCR_LOCAL); /* Transmitter [virtually] off */ + DP_OUT(base, DP_TPSR, dp->tx_buf1); /* Transmitter start page */ + dp->tx1 = dp->tx2 = 0; + dp->tx_next = dp->tx_buf1; + dp->tx_started = false; + dp->running = true; + DP_OUT(base, DP_PSTART, dp->rx_buf_start); /* Receive ring start page */ + DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); /* Receive ring boundary */ + DP_OUT(base, DP_PSTOP, dp->rx_buf_end); /* Receive ring end page */ + dp->rx_next = dp->rx_buf_start - 1; + dp->running = true; + DP_OUT(base, DP_ISR, 0xFF); /* Clear any pending interrupts */ + DP_OUT(base, DP_IMR, DP_IMR_All); /* Enable all interrupts */ + DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1 | DP_CR_STOP); /* Select page 1 */ + DP_OUT(base, DP_P1_CURP, dp->rx_buf_start); /* Current page - next free page for Rx */ + dp->running = true; + for (i = 0; i < ETHER_ADDR_LEN; i++) { + /* FIXME */ + /*((vu_short*)( base + ((DP_P1_PAR0 + i) * 2) + + * 0x1400)) = enaddr[i];*/ + DP_OUT(base, DP_P1_PAR0+i, enaddr[i]); + } + /* Enable and start device */ + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); + DP_OUT(base, DP_TCR, DP_TCR_NORMAL); /* Normal transmit operations */ + DP_OUT(base, DP_RCR, DP_RCR_AB); /* Accept broadcast, no errors, no multicast */ + dp->running = true; +} + +/* + * This routine is called to start the transmitter. It is split out from the + * data handling routine so it may be called either when data becomes first + * available or when an Tx interrupt occurs + */ + +static void +dp83902a_start_xmit(int start_page, int len) +{ + dp83902a_priv_data_t *dp = (dp83902a_priv_data_t *) &nic; + u8 *base = dp->base; + + DEBUG_FUNCTION(); + +#if DEBUG & 1 + printf("Tx pkt %d len %d\n", start_page, len); + if (dp->tx_started) + printf("TX already started?!?\n"); +#endif + + DP_OUT(base, DP_ISR, (DP_ISR_TxP | DP_ISR_TxE)); + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); + DP_OUT(base, DP_TBCL, len & 0xFF); + DP_OUT(base, DP_TBCH, len >> 8); + DP_OUT(base, DP_TPSR, start_page); + DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_TXPKT | DP_CR_START); + + dp->tx_started = true; +} + +/* + * This routine is called to send data to the hardware. It is known a-priori + * that there is free buffer space (dp->tx_next). + */ +static void +dp83902a_send(u8 *data, int total_len, u32 key) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; + u8 *base = dp->base; + int len, start_page, pkt_len, i, isr; +#if DEBUG & 4 + int dx; +#endif + + DEBUG_FUNCTION(); + + len = pkt_len = total_len; + if (pkt_len < IEEE_8023_MIN_FRAME) + pkt_len = IEEE_8023_MIN_FRAME; + + start_page = dp->tx_next; + if (dp->tx_next == dp->tx_buf1) { + dp->tx1 = start_page; + dp->tx1_len = pkt_len; + dp->tx1_key = key; + dp->tx_next = dp->tx_buf2; + } else { + dp->tx2 = start_page; + dp->tx2_len = pkt_len; + dp->tx2_key = key; + dp->tx_next = dp->tx_buf1; + } + +#if DEBUG & 5 + printf("TX prep page %d len %d\n", start_page, pkt_len); +#endif + + DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */ + { + /* + * Dummy read. The manual sez something slightly different, + * but the code is extended a bit to do what Hitachi's monitor + * does (i.e., also read data). + */ + + u16 tmp; + int len = 1; + + DP_OUT(base, DP_RSAL, 0x100 - len); + DP_OUT(base, DP_RSAH, (start_page - 1) & 0xff); + DP_OUT(base, DP_RBCL, len); + DP_OUT(base, DP_RBCH, 0); + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_RDMA | DP_CR_START); + DP_IN_DATA(dp->data, tmp); + } + +#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_TX_DMA + /* + * Stall for a bit before continuing to work around random data + * corruption problems on some platforms. + */ + CYGACC_CALL_IF_DELAY_US(1); +#endif + + /* Send data to device buffer(s) */ + DP_OUT(base, DP_RSAL, 0); + DP_OUT(base, DP_RSAH, start_page); + DP_OUT(base, DP_RBCL, pkt_len & 0xFF); + DP_OUT(base, DP_RBCH, pkt_len >> 8); + DP_OUT(base, DP_CR, DP_CR_WDMA | DP_CR_START); + + /* Put data into buffer */ +#if DEBUG & 4 + printf(" sg buf %08lx len %08x\n ", (u32)data, len); + dx = 0; +#endif + while (len > 0) { +#if DEBUG & 4 + printf(" %02x", *data); + if (0 == (++dx % 16)) printf("\n "); +#endif + + DP_OUT_DATA(dp->data, *data++); + len--; + } +#if DEBUG & 4 + printf("\n"); +#endif + if (total_len < pkt_len) { +#if DEBUG & 4 + printf(" + %d bytes of padding\n", pkt_len - total_len); +#endif + /* Padding to 802.3 length was required */ + for (i = total_len; i < pkt_len;) { + i++; + DP_OUT_DATA(dp->data, 0); + } + } + +#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_TX_DMA + /* + * After last data write, delay for a bit before accessing the + * device again, or we may get random data corruption in the last + * datum (on some platforms). + */ + CYGACC_CALL_IF_DELAY_US(1); +#endif + + /* Wait for DMA to complete */ + do { + DP_IN(base, DP_ISR, isr); + } while ((isr & DP_ISR_RDC) == 0); + + /* Then disable DMA */ + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); + + /* Start transmit if not already going */ + if (!dp->tx_started) { + if (start_page == dp->tx1) { + dp->tx_int = 1; /* Expecting interrupt from BUF1 */ + } else { + dp->tx_int = 2; /* Expecting interrupt from BUF2 */ + } + dp83902a_start_xmit(start_page, pkt_len); + } +} + +/* + * This function is called when a packet has been received. It's job is + * to prepare to unload the packet from the hardware. Once the length of + * the packet is known, the upper layer of the driver can be told. When + * the upper layer is ready to unload the packet, the internal function + * 'dp83902a_recv' will be called to actually fetch it from the hardware. + */ +static void +dp83902a_RxEvent(void) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; + u8 *base = dp->base; + u8 rsr; + u8 rcv_hdr[4]; + int i, len, pkt, cur; + + DEBUG_FUNCTION(); + + DP_IN(base, DP_RSR, rsr); + while (true) { + /* Read incoming packet header */ + DP_OUT(base, DP_CR, DP_CR_PAGE1 | DP_CR_NODMA | DP_CR_START); + DP_IN(base, DP_P1_CURP, cur); + DP_OUT(base, DP_P1_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); + DP_IN(base, DP_BNDRY, pkt); + + pkt += 1; + if (pkt == dp->rx_buf_end) + pkt = dp->rx_buf_start; + + if (pkt == cur) { + break; + } + DP_OUT(base, DP_RBCL, sizeof(rcv_hdr)); + DP_OUT(base, DP_RBCH, 0); + DP_OUT(base, DP_RSAL, 0); + DP_OUT(base, DP_RSAH, pkt); + if (dp->rx_next == pkt) { + if (cur == dp->rx_buf_start) + DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); + else + DP_OUT(base, DP_BNDRY, cur - 1); /* Update pointer */ + return; + } + dp->rx_next = pkt; + DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */ + DP_OUT(base, DP_CR, DP_CR_RDMA | DP_CR_START); +#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_RX_DMA + CYGACC_CALL_IF_DELAY_US(10); +#endif + + /* read header (get data size)*/ + for (i = 0; i < sizeof(rcv_hdr);) { + DP_IN_DATA(dp->data, rcv_hdr[i++]); + } + +#if DEBUG & 5 + printf("rx hdr %02x %02x %02x %02x\n", + rcv_hdr[0], rcv_hdr[1], rcv_hdr[2], rcv_hdr[3]); +#endif + len = ((rcv_hdr[3] << 8) | rcv_hdr[2]) - sizeof(rcv_hdr); + + /* data read */ + uboot_push_packet_len(len); + + if (rcv_hdr[1] == dp->rx_buf_start) + DP_OUT(base, DP_BNDRY, dp->rx_buf_end - 1); + else + DP_OUT(base, DP_BNDRY, rcv_hdr[1] - 1); /* Update pointer */ + } +} + +/* + * This function is called as a result of the "eth_drv_recv()" call above. + * It's job is to actually fetch data for a packet from the hardware once + * memory buffers have been allocated for the packet. Note that the buffers + * may come in pieces, using a scatter-gather list. This allows for more + * efficient processing in the upper layers of the stack. + */ +static void +dp83902a_recv(u8 *data, int len) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; + u8 *base = dp->base; + int i, mlen; + u8 saved_char = 0; + bool saved; +#if DEBUG & 4 + int dx; +#endif + + DEBUG_FUNCTION(); + +#if DEBUG & 5 + printf("Rx packet %d length %d\n", dp->rx_next, len); +#endif + + /* Read incoming packet data */ + DP_OUT(base, DP_CR, DP_CR_PAGE0 | DP_CR_NODMA | DP_CR_START); + DP_OUT(base, DP_RBCL, len & 0xFF); + DP_OUT(base, DP_RBCH, len >> 8); + DP_OUT(base, DP_RSAL, 4); /* Past header */ + DP_OUT(base, DP_RSAH, dp->rx_next); + DP_OUT(base, DP_ISR, DP_ISR_RDC); /* Clear end of DMA */ + DP_OUT(base, DP_CR, DP_CR_RDMA | DP_CR_START); +#ifdef CYGHWR_NS_DP83902A_PLF_BROKEN_RX_DMA + CYGACC_CALL_IF_DELAY_US(10); +#endif + + saved = false; + for (i = 0; i < 1; i++) { + if (data) { + mlen = len; +#if DEBUG & 4 + printf(" sg buf %08lx len %08x \n", (u32) data, mlen); + dx = 0; +#endif + while (0 < mlen) { + /* Saved byte from previous loop? */ + if (saved) { + *data++ = saved_char; + mlen--; + saved = false; + continue; + } + + { + u8 tmp; + DP_IN_DATA(dp->data, tmp); +#if DEBUG & 4 + printf(" %02x", tmp); + if (0 == (++dx % 16)) printf("\n "); +#endif + *data++ = tmp;; + mlen--; + } + } +#if DEBUG & 4 + printf("\n"); +#endif + } + } +} + +static void +dp83902a_TxEvent(void) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; + u8 *base = dp->base; + u8 tsr; + u32 key; + + DEBUG_FUNCTION(); + + DP_IN(base, DP_TSR, tsr); + if (dp->tx_int == 1) { + key = dp->tx1_key; + dp->tx1 = 0; + } else { + key = dp->tx2_key; + dp->tx2 = 0; + } + /* Start next packet if one is ready */ + dp->tx_started = false; + if (dp->tx1) { + dp83902a_start_xmit(dp->tx1, dp->tx1_len); + dp->tx_int = 1; + } else if (dp->tx2) { + dp83902a_start_xmit(dp->tx2, dp->tx2_len); + dp->tx_int = 2; + } else { + dp->tx_int = 0; + } + /* Tell higher level we sent this packet */ + uboot_push_tx_done(key, 0); +} + +/* + * Read the tally counters to clear them. Called in response to a CNT + * interrupt. + */ +static void +dp83902a_ClearCounters(void) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; + u8 *base = dp->base; + u8 cnt1, cnt2, cnt3; + + DP_IN(base, DP_FER, cnt1); + DP_IN(base, DP_CER, cnt2); + DP_IN(base, DP_MISSED, cnt3); + DP_OUT(base, DP_ISR, DP_ISR_CNT); +} + +/* + * Deal with an overflow condition. This code follows the procedure set + * out in section 7.0 of the datasheet. + */ +static void +dp83902a_Overflow(void) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *)&nic; + u8 *base = dp->base; + u8 isr; + + /* Issue a stop command and wait 1.6ms for it to complete. */ + DP_OUT(base, DP_CR, DP_CR_STOP | DP_CR_NODMA); + CYGACC_CALL_IF_DELAY_US(1600); + + /* Clear the remote byte counter registers. */ + DP_OUT(base, DP_RBCL, 0); + DP_OUT(base, DP_RBCH, 0); + + /* Enter loopback mode while we clear the buffer. */ + DP_OUT(base, DP_TCR, DP_TCR_LOCAL); + DP_OUT(base, DP_CR, DP_CR_START | DP_CR_NODMA); + + /* + * Read in as many packets as we can and acknowledge any and receive + * interrupts. Since the buffer has overflowed, a receive event of + * some kind will have occured. + */ + dp83902a_RxEvent(); + DP_OUT(base, DP_ISR, DP_ISR_RxP|DP_ISR_RxE); + + /* Clear the overflow condition and leave loopback mode. */ + DP_OUT(base, DP_ISR, DP_ISR_OFLW); + DP_OUT(base, DP_TCR, DP_TCR_NORMAL); + + /* + * If a transmit command was issued, but no transmit event has occured, + * restart it here. + */ + DP_IN(base, DP_ISR, isr); + if (dp->tx_started && !(isr & (DP_ISR_TxP|DP_ISR_TxE))) { + DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_TXPKT | DP_CR_START); + } +} + +static void +dp83902a_poll(void) +{ + struct dp83902a_priv_data *dp = (struct dp83902a_priv_data *) &nic; + u8 *base = dp->base; + u8 isr; + + DP_OUT(base, DP_CR, DP_CR_NODMA | DP_CR_PAGE0 | DP_CR_START); + DP_IN(base, DP_ISR, isr); + while (0 != isr) { + /* + * The CNT interrupt triggers when the MSB of one of the error + * counters is set. We don't much care about these counters, but + * we should read their values to reset them. + */ + if (isr & DP_ISR_CNT) { + dp83902a_ClearCounters(); + } + /* + * Check for overflow. It's a special case, since there's a + * particular procedure that must be followed to get back into + * a running state.a + */ + if (isr & DP_ISR_OFLW) { + dp83902a_Overflow(); + } else { + /* + * Other kinds of interrupts can be acknowledged simply by + * clearing the relevant bits of the ISR. Do that now, then + * handle the interrupts we care about. + */ + DP_OUT(base, DP_ISR, isr); /* Clear set bits */ + if (!dp->running) break; /* Is this necessary? */ + /* + * Check for tx_started on TX event since these may happen + * spuriously it seems. + */ + if (isr & (DP_ISR_TxP|DP_ISR_TxE) && dp->tx_started) { + dp83902a_TxEvent(); + } + if (isr & (DP_ISR_RxP|DP_ISR_RxE)) { + dp83902a_RxEvent(); + } + } + DP_IN(base, DP_ISR, isr); + } +} + + +/* U-boot specific routines */ +static u8 *pbuf = NULL; + +static int pkey = -1; +static int initialized = 0; + +void uboot_push_packet_len(int len) { + PRINTK("pushed len = %d\n", len); + if (len >= 2000) { + printf("NE2000: packet too big\n"); + return; + } + dp83902a_recv(&pbuf[0], len); + + /*Just pass it to the upper layer*/ + NetReceive(&pbuf[0], len); +} + +void uboot_push_tx_done(int key, int val) { + PRINTK("pushed key = %d\n", key); + pkey = key; +} + +int eth_init(bd_t *bd) { + int r; + u8 dev_addr[6]; + char ethaddr[20]; + + PRINTK("### eth_init\n"); + + if (!pbuf) { + pbuf = malloc(2000); + if (!pbuf) { + printf("Cannot allocate rx buffer\n"); + return -1; + } + } + +#ifdef CONFIG_DRIVER_NE2000_CCR + { + vu_char *p = (vu_char *) CONFIG_DRIVER_NE2000_CCR; + + PRINTK("CCR before is %x\n", *p); + *p = CONFIG_DRIVER_NE2000_VAL; + PRINTK("CCR after is %x\n", *p); + } +#endif + + nic.base = (u8 *) CONFIG_DRIVER_NE2000_BASE; + + r = get_prom(dev_addr, nic.base); + if (!r) + return -1; + + sprintf (ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X", + dev_addr[0], dev_addr[1], + dev_addr[2], dev_addr[3], + dev_addr[4], dev_addr[5]) ; + PRINTK("Set environment from HW MAC addr = \"%s\"\n", ethaddr); + setenv ("ethaddr", ethaddr); + + nic.data = nic.base + DP_DATA; + nic.tx_buf1 = START_PG; + nic.tx_buf2 = START_PG2; + nic.rx_buf_start = RX_START; + nic.rx_buf_end = RX_END; + + if (dp83902a_init() == false) + return -1; + + dp83902a_start(dev_addr); + initialized = 1; + + return 0; +} + +void eth_halt() { + + PRINTK("### eth_halt\n"); + if(initialized) + dp83902a_stop(); + initialized = 0; +} + +int eth_rx() { + dp83902a_poll(); + return 1; +} + +int eth_send(volatile void *packet, int length) { + int tmo; + + PRINTK("### eth_send\n"); + + pkey = -1; + + dp83902a_send((u8 *) packet, length, 666); + tmo = get_timer (0) + TOUT * CONFIG_SYS_HZ; + while(1) { + dp83902a_poll(); + if (pkey != -1) { + PRINTK("Packet sucesfully sent\n"); + return 0; + } + if (get_timer (0) >= tmo) { + printf("transmission error (timoeut)\n"); + return 0; + } + + } + return 0; +} |