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d3f871482f
The environment is the canonical storage location of the mac address, so we're killing off the global data location and moving everything to querying the env directly. The drivers that get converted here: 3c589 4xx_enet dc2114x dm9000x enc28j60 fsl_mcdmafec ks8695eth mcffec rtl8019 rtl8169 s3c4510b_eth xilinx_emac xilinx_emaclite Signed-off-by: Mike Frysinger <vapier@gentoo.org> CC: Ben Warren <biggerbadderben@gmail.com> CC: Rolf Offermanns <rof@sysgo.de> CC: Stefan Roese <sr@denx.de> CC: Sascha Hauer <saschahauer@web.de> CC: TsiChung Liew <Tsi-Chung.Liew@freescale.com> CC: Greg Ungerer <greg.ungerer@opengear.com> CC: Xue Ligong <lgxue@hotmail.com> CC: Masami Komiya <mkomiya@sonare.it> CC: Curt Brune <curt@cucy.com> CC: Michal SIMEK <monstr@monstr.eu>
228 lines
6 KiB
C
228 lines
6 KiB
C
/*
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* ks8695eth.c -- KS8695 ethernet driver
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*
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* (C) Copyright 2004-2005, Greg Ungerer <greg.ungerer@opengear.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/****************************************************************************/
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#include <common.h>
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#include <malloc.h>
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#include <net.h>
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#include <asm/io.h>
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#include <asm/arch/platform.h>
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/****************************************************************************/
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/*
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* Hardware register access to the KS8695 LAN ethernet port
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* (well, it is the 4 port switch really).
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*/
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#define ks8695_read(a) *((volatile unsigned long *) (KS8695_IO_BASE + (a)))
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#define ks8695_write(a,v) *((volatile unsigned long *) (KS8695_IO_BASE + (a))) = (v)
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/****************************************************************************/
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/*
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* Define the descriptor in-memory data structures.
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*/
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struct ks8695_txdesc {
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uint32_t owner;
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uint32_t ctrl;
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uint32_t addr;
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uint32_t next;
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};
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struct ks8695_rxdesc {
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uint32_t status;
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uint32_t ctrl;
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uint32_t addr;
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uint32_t next;
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};
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/****************************************************************************/
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/*
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* Allocate local data structures to use for receiving and sending
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* packets. Just to keep it all nice and simple.
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*/
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#define TXDESCS 4
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#define RXDESCS 4
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#define BUFSIZE 2048
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volatile struct ks8695_txdesc ks8695_tx[TXDESCS] __attribute__((aligned(256)));
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volatile struct ks8695_rxdesc ks8695_rx[RXDESCS] __attribute__((aligned(256)));
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volatile uint8_t ks8695_bufs[BUFSIZE*(TXDESCS+RXDESCS)] __attribute__((aligned(2048)));;
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/****************************************************************************/
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/*
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* Ideally we want to use the MAC address stored in flash.
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* But we do some sanity checks in case they are not present
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* first.
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*/
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unsigned char eth_mac[] = {
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0x00, 0x13, 0xc6, 0x00, 0x00, 0x00
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};
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void ks8695_getmac(void)
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{
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unsigned char *fp;
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int i;
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/* Check if flash MAC is valid */
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fp = (unsigned char *) 0x0201c000;
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for (i = 0; (i < 6); i++) {
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if ((fp[i] != 0) && (fp[i] != 0xff))
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break;
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}
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/* If we found a valid looking MAC address then use it */
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if (i < 6)
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memcpy(ð_mac[0], fp, 6);
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}
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/****************************************************************************/
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void eth_reset(bd_t *bd)
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{
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int i;
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debug ("%s(%d): eth_reset()\n", __FILE__, __LINE__);
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/* Reset the ethernet engines first */
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ks8695_write(KS8695_LAN_DMA_TX, 0x80000000);
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ks8695_write(KS8695_LAN_DMA_RX, 0x80000000);
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ks8695_getmac();
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/* Set MAC address */
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ks8695_write(KS8695_LAN_MAC_LOW, (eth_mac[5] | (eth_mac[4] << 8) |
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(eth_mac[3] << 16) | (eth_mac[2] << 24)));
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ks8695_write(KS8695_LAN_MAC_HIGH, (eth_mac[1] | (eth_mac[0] << 8)));
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/* Turn the 4 port switch on */
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i = ks8695_read(KS8695_SWITCH_CTRL0);
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ks8695_write(KS8695_SWITCH_CTRL0, (i | 0x1));
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/* ks8695_write(KS8695_WAN_CONTROL, 0x3f000066); */
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/* Initialize descriptor rings */
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for (i = 0; (i < TXDESCS); i++) {
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ks8695_tx[i].owner = 0;
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ks8695_tx[i].ctrl = 0;
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ks8695_tx[i].addr = (uint32_t) &ks8695_bufs[i*BUFSIZE];
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ks8695_tx[i].next = (uint32_t) &ks8695_tx[i+1];
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}
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ks8695_tx[TXDESCS-1].ctrl = 0x02000000;
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ks8695_tx[TXDESCS-1].next = (uint32_t) &ks8695_tx[0];
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for (i = 0; (i < RXDESCS); i++) {
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ks8695_rx[i].status = 0x80000000;
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ks8695_rx[i].ctrl = BUFSIZE - 4;
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ks8695_rx[i].addr = (uint32_t) &ks8695_bufs[(i+TXDESCS)*BUFSIZE];
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ks8695_rx[i].next = (uint32_t) &ks8695_rx[i+1];
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}
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ks8695_rx[RXDESCS-1].ctrl |= 0x00080000;
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ks8695_rx[RXDESCS-1].next = (uint32_t) &ks8695_rx[0];
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/* The KS8695 is pretty slow reseting the ethernets... */
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udelay(2000000);
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/* Enable the ethernet engine */
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ks8695_write(KS8695_LAN_TX_LIST, (uint32_t) &ks8695_tx[0]);
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ks8695_write(KS8695_LAN_RX_LIST, (uint32_t) &ks8695_rx[0]);
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ks8695_write(KS8695_LAN_DMA_TX, 0x3);
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ks8695_write(KS8695_LAN_DMA_RX, 0x71);
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ks8695_write(KS8695_LAN_DMA_RX_START, 0x1);
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printf("KS8695 ETHERNET: %pM\n", eth_mac);
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}
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/****************************************************************************/
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int eth_init(bd_t *bd)
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{
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debug ("%s(%d): eth_init()\n", __FILE__, __LINE__);
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eth_reset(bd);
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return 0;
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}
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/****************************************************************************/
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void eth_halt(void)
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{
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debug ("%s(%d): eth_halt()\n", __FILE__, __LINE__);
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/* Reset the ethernet engines */
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ks8695_write(KS8695_LAN_DMA_TX, 0x80000000);
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ks8695_write(KS8695_LAN_DMA_RX, 0x80000000);
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}
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/****************************************************************************/
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int eth_rx(void)
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{
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volatile struct ks8695_rxdesc *dp;
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int i, len = 0;
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debug ("%s(%d): eth_rx()\n", __FILE__, __LINE__);
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for (i = 0; (i < RXDESCS); i++) {
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dp= &ks8695_rx[i];
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if ((dp->status & 0x80000000) == 0) {
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len = (dp->status & 0x7ff) - 4;
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NetReceive((void *) dp->addr, len);
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dp->status = 0x80000000;
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ks8695_write(KS8695_LAN_DMA_RX_START, 0x1);
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break;
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}
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}
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return len;
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}
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/****************************************************************************/
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int eth_send(volatile void *packet, int len)
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{
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volatile struct ks8695_txdesc *dp;
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static int next = 0;
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debug ("%s(%d): eth_send(packet=%x,len=%d)\n", __FILE__, __LINE__,
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packet, len);
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dp = &ks8695_tx[next];
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memcpy((void *) dp->addr, (void *) packet, len);
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if (len < 64) {
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memset((void *) (dp->addr + len), 0, 64-len);
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len = 64;
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}
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dp->ctrl = len | 0xe0000000;
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dp->owner = 0x80000000;
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ks8695_write(KS8695_LAN_DMA_TX, 0x3);
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ks8695_write(KS8695_LAN_DMA_TX_START, 0x1);
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if (++next >= TXDESCS)
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next = 0;
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return len;
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}
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