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    SubjectRe: [patch 089/181] Blackfin: on-chip ethernet MAC controller driver
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    Date
    Hi Jeff:

    Could you please review this patch? Sorry for miss sending the patch to
    you for review at beginning.

    Thanks a lot
    -Bryan Wu

    On Sun, 2007-05-06 at 14:50 -0700, akpm@linux-foundation.org wrote:
    > From: "Wu, Bryan" <bryan.wu@analog.com>
    >
    > This patch implements the driver necessary use the Analog Devices
    > Blackfin processor's on-chip ethernet MAC controller.
    >
    > Signed-off-by: Bryan Wu <bryan.wu@analog.com>
    > Cc: Jeff Garzik <jeff@garzik.org>
    > Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    > ---
    >
    > drivers/net/Kconfig | 44 +
    > drivers/net/Makefile | 1
    > drivers/net/bfin_mac.c | 981 +++++++++++++++++++++++++++++++++++++++
    > drivers/net/bfin_mac.h | 147 +++++
    > 4 files changed, 1173 insertions(+)
    >
    > diff -puN drivers/net/Kconfig~blackfin-on-chip-ethernet-mac-controller-driver drivers/net/Kconfig
    > --- a/drivers/net/Kconfig~blackfin-on-chip-ethernet-mac-controller-driver
    > +++ a/drivers/net/Kconfig
    > @@ -836,6 +836,50 @@ config SMC91X
    > module, say M here and read <file:Documentation/kbuild/modules.txt>
    > as well as <file:Documentation/networking/net-modules.txt>.
    >
    > +config BFIN_MAC
    > + tristate "Blackfin 536/537 on-chip mac support"
    > + depends on NET_ETHERNET && (BF537 || BF536) && (!BF537_PORT_H)
    > + select CRC32
    > + select BFIN_MAC_USE_L1 if DMA_UNCACHED_NONE
    > + help
    > + This is the driver for blackfin on-chip mac device. Say Y if you want it
    > + compiled into the kernel. This driver is also available as a module
    > + ( = code which can be inserted in and removed from the running kernel
    > + whenever you want). The module will be called bfin_mac.
    > +
    > +config BFIN_MAC_USE_L1
    > + bool "Use L1 memory for rx/tx packets"
    > + depends on BFIN_MAC && BF537
    > + default y
    > + help
    > + To get maximum network performace, you should use L1 memory as rx/tx buffers.
    > + Say N here if you want to reserve L1 memory for other uses.
    > +
    > +config BFIN_TX_DESC_NUM
    > + int "Number of transmit buffer packets"
    > + depends on BFIN_MAC
    > + range 6 10 if BFIN_MAC_USE_L1
    > + range 10 100
    > + default "10"
    > + help
    > + Set the number of buffer packets used in driver.
    > +
    > +config BFIN_RX_DESC_NUM
    > + int "Number of receive buffer packets"
    > + depends on BFIN_MAC
    > + range 20 100 if BFIN_MAC_USE_L1
    > + range 20 800
    > + default "20"
    > + help
    > + Set the number of buffer packets used in driver.
    > +
    > +config BFIN_MAC_RMII
    > + bool "RMII PHY Interface (EXPERIMENTAL)"
    > + depends on BFIN_MAC && EXPERIMENTAL
    > + default n
    > + help
    > + Use Reduced PHY MII Interface
    > +
    > config SMC9194
    > tristate "SMC 9194 support"
    > depends on NET_VENDOR_SMC && (ISA || MAC && BROKEN)
    > diff -puN drivers/net/Makefile~blackfin-on-chip-ethernet-mac-controller-driver drivers/net/Makefile
    > --- a/drivers/net/Makefile~blackfin-on-chip-ethernet-mac-controller-driver
    > +++ a/drivers/net/Makefile
    > @@ -194,6 +194,7 @@ obj-$(CONFIG_S2IO) += s2io.o
    > obj-$(CONFIG_MYRI10GE) += myri10ge/
    > obj-$(CONFIG_SMC91X) += smc91x.o
    > obj-$(CONFIG_SMC911X) += smc911x.o
    > +obj-$(CONFIG_BFIN_MAC) += bfin_mac.o
    > obj-$(CONFIG_DM9000) += dm9000.o
    > obj-$(CONFIG_FEC_8XX) += fec_8xx/
    > obj-$(CONFIG_PASEMI_MAC) += pasemi_mac.o
    > diff -puN /dev/null drivers/net/bfin_mac.c
    > --- /dev/null
    > +++ a/drivers/net/bfin_mac.c
    > @@ -0,0 +1,981 @@
    > +/*
    > + * File: drivers/net/bfin_mac.c
    > + * Based on:
    > + * Author: Luke Yang <luke.yang@analog.com>
    > + *
    > + * Created:
    > + * Description:
    > + *
    > + * Modified:
    > + * Copyright 2004-2006 Analog Devices Inc.
    > + *
    > + * Bugs: Enter bugs at http://blackfin.uclinux.org/
    > + *
    > + * 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, 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 ; see the file COPYING.
    > + * If not, write to the Free Software Foundation,
    > + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    > + */
    > +
    > +#include <linux/init.h>
    > +#include <linux/module.h>
    > +#include <linux/kernel.h>
    > +#include <linux/sched.h>
    > +#include <linux/slab.h>
    > +#include <linux/delay.h>
    > +#include <linux/timer.h>
    > +#include <linux/errno.h>
    > +#include <linux/ioport.h>
    > +#include <linux/crc32.h>
    > +#include <linux/device.h>
    > +#include <linux/spinlock.h>
    > +#include <linux/ethtool.h>
    > +#include <linux/mii.h>
    > +
    > +#include <linux/netdevice.h>
    > +#include <linux/etherdevice.h>
    > +#include <linux/skbuff.h>
    > +
    > +#include <linux/platform_device.h>
    > +#include <linux/netdevice.h>
    > +#include <linux/etherdevice.h>
    > +#include <linux/skbuff.h>
    > +
    > +#include <asm/io.h>
    > +#include <asm/irq.h>
    > +#include <asm/dma.h>
    > +#include <linux/dma-mapping.h>
    > +
    > +#include <asm/irq.h>
    > +#include <asm/blackfin.h>
    > +#include <asm/delay.h>
    > +
    > +#include "bfin_mac.h"
    > +
    > +#define CARDNAME "bfin_mac"
    > +
    > +MODULE_LICENSE("GPL");
    > +MODULE_AUTHOR("Luke Yang");
    > +MODULE_DESCRIPTION("Blackfin MAC Driver");
    > +
    > +#if defined(CONFIG_BFIN_MAC_USE_L1)
    > +# define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size)
    > +# define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr)
    > +#else
    > +# define bfin_mac_alloc(dma_handle, size) dma_alloc_coherent(NULL, size, dma_handle, GFP_DMA)
    > +# define bfin_mac_free(dma_handle, ptr) dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle)
    > +#endif
    > +
    > +#define PKT_BUF_SZ 1580
    > +
    > +static void desc_list_free(void);
    > +
    > +/* pointers to maintain transmit list */
    > +static struct net_dma_desc_tx *tx_list_head;
    > +static struct net_dma_desc_tx *tx_list_tail;
    > +static struct net_dma_desc_rx *rx_list_head;
    > +static struct net_dma_desc_rx *rx_list_tail;
    > +static struct net_dma_desc_rx *current_rx_ptr;
    > +static struct net_dma_desc_tx *current_tx_ptr;
    > +static struct net_dma_desc_tx *tx_desc;
    > +static struct net_dma_desc_rx *rx_desc;
    > +
    > +static int desc_list_init(void)
    > +{
    > + struct net_dma_desc_tx *tmp_desc_tx;
    > + struct net_dma_desc_rx *tmp_desc_rx;
    > + int i;
    > + struct sk_buff *new_skb;
    > +#if !defined(CONFIG_BFIN_MAC_USE_L1)
    > + dma_addr_t dma_handle;
    > +#endif
    > +
    > + tx_desc =
    > + bfin_mac_alloc(&dma_handle,
    > + sizeof(struct net_dma_desc_tx) *
    > + CONFIG_BFIN_TX_DESC_NUM);
    > + if (tx_desc == NULL)
    > + goto init_error;
    > +
    > + rx_desc =
    > + bfin_mac_alloc(&dma_handle,
    > + sizeof(struct net_dma_desc_rx) *
    > + CONFIG_BFIN_RX_DESC_NUM);
    > + if (rx_desc == NULL)
    > + goto init_error;
    > +
    > + /* init tx_list */
    > + for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
    > +
    > + tmp_desc_tx = tx_desc + i;
    > +
    > + if (i == 0) {
    > + tx_list_head = tmp_desc_tx;
    > + tx_list_tail = tmp_desc_tx;
    > + }
    > +
    > + tmp_desc_tx->desc_a.start_addr =
    > + (unsigned long)tmp_desc_tx->packet;
    > + tmp_desc_tx->desc_a.x_count = 0;
    > + tmp_desc_tx->desc_a.config.b_DMA_EN = 0; /* disabled */
    > + tmp_desc_tx->desc_a.config.b_WNR = 0; /* read from memory */
    > + tmp_desc_tx->desc_a.config.b_WDSIZE = 2; /* wordsize is 32 bits */
    > + tmp_desc_tx->desc_a.config.b_NDSIZE = 6; /* 6 half words is desc size. */
    > + tmp_desc_tx->desc_a.config.b_FLOW = 7; /* large desc flow */
    > + tmp_desc_tx->desc_a.next_dma_desc = &(tmp_desc_tx->desc_b);
    > +
    > + tmp_desc_tx->desc_b.start_addr =
    > + (unsigned long)(&(tmp_desc_tx->status));
    > + tmp_desc_tx->desc_b.x_count = 0;
    > + tmp_desc_tx->desc_b.config.b_DMA_EN = 1; /* enabled */
    > + tmp_desc_tx->desc_b.config.b_WNR = 1; /* write to memory */
    > + tmp_desc_tx->desc_b.config.b_WDSIZE = 2; /* wordsize is 32 bits */
    > + tmp_desc_tx->desc_b.config.b_DI_EN = 0; /* disable interrupt */
    > + tmp_desc_tx->desc_b.config.b_NDSIZE = 6;
    > + tmp_desc_tx->desc_b.config.b_FLOW = 7; /* stop mode */
    > + tmp_desc_tx->skb = NULL;
    > + tx_list_tail->desc_b.next_dma_desc = &(tmp_desc_tx->desc_a);
    > + tx_list_tail->next = tmp_desc_tx;
    > +
    > + tx_list_tail = tmp_desc_tx;
    > + }
    > + tx_list_tail->next = tx_list_head; /* tx_list is a circle */
    > + tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a);
    > + current_tx_ptr = tx_list_head;
    > +
    > + /* init rx_list */
    > + for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
    > +
    > + tmp_desc_rx = rx_desc + i;
    > +
    > + if (i == 0) {
    > + rx_list_head = tmp_desc_rx;
    > + rx_list_tail = tmp_desc_rx;
    > + }
    > +
    > + /* allocat a new skb for next time receive */
    > + new_skb = dev_alloc_skb(PKT_BUF_SZ + 2);
    > + if (!new_skb) {
    > + printk(KERN_NOTICE CARDNAME
    > + ": init: low on mem - packet dropped\n");
    > + goto init_error;
    > + }
    > + skb_reserve(new_skb, 2);
    > + tmp_desc_rx->skb = new_skb;
    > + /* since RXDWA is enabled */
    > + tmp_desc_rx->desc_a.start_addr =
    > + (unsigned long)new_skb->data - 2;
    > + tmp_desc_rx->desc_a.x_count = 0;
    > + tmp_desc_rx->desc_a.config.b_DMA_EN = 1; /* enabled */
    > + tmp_desc_rx->desc_a.config.b_WNR = 1; /* Write to memory */
    > + tmp_desc_rx->desc_a.config.b_WDSIZE = 2; /* wordsize is 32 bits */
    > + tmp_desc_rx->desc_a.config.b_NDSIZE = 6; /* 6 half words is desc size. */
    > + tmp_desc_rx->desc_a.config.b_FLOW = 7; /* large desc flow */
    > + tmp_desc_rx->desc_a.next_dma_desc = &(tmp_desc_rx->desc_b);
    > +
    > + tmp_desc_rx->desc_b.start_addr =
    > + (unsigned long)(&(tmp_desc_rx->status));
    > + tmp_desc_rx->desc_b.x_count = 0;
    > + tmp_desc_rx->desc_b.config.b_DMA_EN = 1; /* enabled */
    > + tmp_desc_rx->desc_b.config.b_WNR = 1; /* Write to memory */
    > + tmp_desc_rx->desc_b.config.b_WDSIZE = 2; /* wordsize is 32 bits */
    > + tmp_desc_rx->desc_b.config.b_NDSIZE = 6;
    > + tmp_desc_rx->desc_b.config.b_DI_EN = 1; /* enable interrupt */
    > + tmp_desc_rx->desc_b.config.b_FLOW = 7; /* large mode */
    > + rx_list_tail->desc_b.next_dma_desc = &(tmp_desc_rx->desc_a);
    > +
    > + rx_list_tail->next = tmp_desc_rx;
    > + rx_list_tail = tmp_desc_rx;
    > + }
    > + rx_list_tail->next = rx_list_head; /* rx_list is a circle */
    > + rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a);
    > + current_rx_ptr = rx_list_head;
    > +
    > + return 0;
    > +
    > + init_error:
    > + desc_list_free();
    > + printk(KERN_ERR CARDNAME ": kmalloc failed\n");
    > + return -ENOMEM;
    > +}
    > +
    > +static void desc_list_free(void)
    > +{
    > + struct net_dma_desc_rx *tmp_desc_rx;
    > + struct net_dma_desc_tx *tmp_desc_tx;
    > + int i;
    > +#if !defined(CONFIG_BFIN_MAC_USE_L1)
    > + dma_addr_t dma_handle = 0;
    > +#endif
    > +
    > + if (tx_desc != NULL) {
    > + tmp_desc_tx = tx_list_head;
    > + for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
    > + if (tmp_desc_tx != NULL) {
    > + if (tmp_desc_tx->skb) {
    > + dev_kfree_skb(tmp_desc_tx->skb);
    > + tmp_desc_tx->skb = NULL;
    > + }
    > +
    > + }
    > + tmp_desc_tx = tmp_desc_tx->next;
    > + }
    > + bfin_mac_free(dma_handle, tx_desc);
    > + }
    > +
    > + if (rx_desc != NULL) {
    > + tmp_desc_rx = rx_list_head;
    > + for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
    > + if (tmp_desc_rx != NULL) {
    > + if (tmp_desc_rx->skb) {
    > + dev_kfree_skb(tmp_desc_rx->skb);
    > + tmp_desc_rx->skb = NULL;
    > + }
    > + }
    > + tmp_desc_rx = tmp_desc_rx->next;
    > + }
    > + bfin_mac_free(dma_handle, rx_desc);
    > + }
    > +}
    > +
    > +/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
    > +
    > +/* Set FER regs to MUX in Ethernet pins */
    > +static void setup_pin_mux(void)
    > +{
    > + unsigned int fer_val;
    > +
    > + /*
    > + * FER reg bug work-around
    > + * read it once
    > + */
    > + fer_val = bfin_read_PORTH_FER();
    > +
    > +#if defined(CONFIG_BFIN_MAC_RMII)
    > + fer_val = 0xC373;
    > +#else
    > + fer_val = 0xffff;
    > +#endif
    > + /* write it twice to the same value */
    > +
    > + bfin_write_PORTH_FER(fer_val);
    > + bfin_write_PORTH_FER(fer_val);
    > +}
    > +
    > +/* Wait until the previous MDC/MDIO transaction has completed */
    > +static void poll_mdc_done(void)
    > +{
    > + /* poll the STABUSY bit */
    > + while ((bfin_read_EMAC_STAADD()) & STABUSY) {
    > + };
    > +}
    > +
    > +/* Read an off-chip register in a PHY through the MDC/MDIO port */
    > +static u16 read_phy_reg(u16 PHYAddr, u16 RegAddr)
    > +{
    > + poll_mdc_done();
    > + bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | SET_REGAD(RegAddr) | STABUSY); /* read mode */
    > + poll_mdc_done();
    > +
    > + return (u16) bfin_read_EMAC_STADAT();
    > +}
    > +
    > +/* Write an off-chip register in a PHY through the MDC/MDIO port */
    > +static void raw_write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data)
    > +{
    > + bfin_write_EMAC_STADAT(Data);
    > +
    > + bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | SET_REGAD(RegAddr) | STAOP | STABUSY); /* write mode */
    > +
    > + poll_mdc_done();
    > +}
    > +
    > +static void write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data)
    > +{
    > + poll_mdc_done();
    > + raw_write_phy_reg(PHYAddr, RegAddr, Data);
    > +}
    > +
    > +/* set up the phy */
    > +static void bf537mac_setphy(struct net_device *dev)
    > +{
    > + u16 phydat;
    > + u32 sysctl;
    > + struct bf537mac_local *lp = netdev_priv(dev);
    > +
    > + pr_debug("start settting up phy\n");
    > +
    > + /* Program PHY registers */
    > + phydat = 0;
    > +
    > + /* issue a reset */
    > + raw_write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, 0x8000);
    > +
    > + /* wait half a second */
    > + udelay(500);
    > +
    > + phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL);
    > +
    > + /* advertise flow control supported */
    > + phydat = read_phy_reg(lp->PhyAddr, PHYREG_ANAR);
    > + phydat |= (1 << 10);
    > + write_phy_reg(lp->PhyAddr, PHYREG_ANAR, phydat);
    > +
    > + phydat = 0;
    > + if (lp->Negotiate) {
    > + phydat |= 0x1000; /* enable auto negotiation */
    > + } else {
    > + if (lp->FullDuplex) {
    > + phydat |= (1 << 8); /* full duplex */
    > + } else {
    > + phydat &= (~(1 << 8)); /* half duplex */
    > + }
    > + if (!lp->Port10) {
    > + phydat |= (1 << 13); /* 100 Mbps */
    > + } else {
    > + phydat &= (~(1 << 13)); /* 10 Mbps */
    > + }
    > + }
    > +
    > + if (lp->Loopback) {
    > + phydat |= (1 << 14); /* enable TX->RX loopback */
    > +#if 0
    > + write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat);
    > +#endif
    > + }
    > +
    > + write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat);
    > + udelay(500);
    > +
    > + phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL);
    > + /* check for SMSC PHY */
    > + if ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID1) == 0x7)
    > + && ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID2) & 0xfff0) == 0xC0A0)) {
    > + /* we have SMSC PHY so reqest interrupt on link down condition */
    > + write_phy_reg(lp->PhyAddr, 30, 0x0ff); /* enable interrupts */
    > + /* enable PHY_INT */
    > + sysctl = bfin_read_EMAC_SYSCTL();
    > + sysctl |= 0x1;
    > +#if 0
    > + bfin_write_EMAC_SYSCTL(sysctl);
    > +#endif
    > + }
    > +}
    > +
    > +/**************************************************************************/
    > +void setup_system_regs(struct net_device *dev)
    > +{
    > + int PHYADDR;
    > + unsigned short sysctl, phydat;
    > + u32 opmode;
    > + struct bf537mac_local *lp = netdev_priv(dev);
    > + int count = 0;
    > +
    > + PHYADDR = lp->PhyAddr;
    > +
    > + /* Enable PHY output */
    > + if (!(bfin_read_VR_CTL() & PHYCLKOE))
    > + bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
    > +
    > + /* MDC = 2.5 MHz */
    > + sysctl = SET_MDCDIV(24);
    > + /* Odd word alignment for Receive Frame DMA word */
    > + /* Configure checksum support and rcve frame word alignment */
    > +#if defined(BFIN_MAC_CSUM_OFFLOAD)
    > + sysctl |= RXDWA | RXCKS;
    > +#else
    > + sysctl |= RXDWA;
    > +#endif
    > + bfin_write_EMAC_SYSCTL(sysctl);
    > + /* auto negotiation on */
    > + /* full duplex */
    > + /* 100 Mbps */
    > + phydat = PHY_ANEG_EN | PHY_DUPLEX | PHY_SPD_SET;
    > + write_phy_reg(PHYADDR, PHYREG_MODECTL, phydat);
    > +
    > + /* test if full duplex supported */
    > + do {
    > + msleep(100);
    > + phydat = read_phy_reg(PHYADDR, PHYREG_MODESTAT);
    > + if (count > 30) {
    > + printk(KERN_NOTICE CARDNAME
    > + ": Link is down, please check your network connection\n");
    > + break;
    > + }
    > + count++;
    > + } while (!(phydat & 0x0004));
    > +
    > + phydat = read_phy_reg(PHYADDR, PHYREG_ANLPAR);
    > +
    > + if ((phydat & 0x0100) || (phydat & 0x0040)) {
    > + opmode = FDMODE;
    > + } else {
    > + opmode = 0;
    > + printk(KERN_INFO CARDNAME ": Network is set to half duplex\n");
    > + }
    > +
    > +#if defined(CONFIG_BFIN_MAC_RMII)
    > + opmode |= RMII; /* For Now only 100MBit are supported */
    > +#endif
    > +
    > + bfin_write_EMAC_OPMODE(opmode);
    > +
    > +#if 0
    > + bfin_write_EMAC_MMC_CTL(RSTC | CROLL | MMCE);
    > +#endif
    > + bfin_write_EMAC_MMC_CTL(RSTC | CROLL);
    > +
    > + /* Initialize the TX DMA channel registers */
    > + bfin_write_DMA2_X_COUNT(0);
    > + bfin_write_DMA2_X_MODIFY(4);
    > + bfin_write_DMA2_Y_COUNT(0);
    > + bfin_write_DMA2_Y_MODIFY(0);
    > +
    > + /* Initialize the RX DMA channel registers */
    > + bfin_write_DMA1_X_COUNT(0);
    > + bfin_write_DMA1_X_MODIFY(4);
    > + bfin_write_DMA1_Y_COUNT(0);
    > + bfin_write_DMA1_Y_MODIFY(0);
    > +}
    > +
    > +void setup_mac_addr(u8 * mac_addr)
    > +{
    > + /* this depends on a little-endian machine */
    > + bfin_write_EMAC_ADDRLO(*(u32 *) & mac_addr[0]);
    > + bfin_write_EMAC_ADDRHI(*(u16 *) & mac_addr[4]);
    > +}
    > +
    > +static void adjust_tx_list(void)
    > +{
    > + if (tx_list_head->status.status_word != 0
    > + && current_tx_ptr != tx_list_head) {
    > + goto adjust_head; /* released something, just return; */
    > + }
    > +
    > + /* if nothing released, check wait condition */
    > + /* current's next can not be the head, otherwise the dma will not stop as we want */
    > + if (current_tx_ptr->next->next == tx_list_head) {
    > + while (tx_list_head->status.status_word == 0) {
    > + udelay(10);
    > + if (tx_list_head->status.status_word != 0
    > + || !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) {
    > + goto adjust_head;
    > + }
    > + }
    > + if (tx_list_head->status.status_word != 0) {
    > + goto adjust_head;
    > + }
    > + }
    > +
    > + return;
    > +
    > + adjust_head:
    > + do {
    > + tx_list_head->desc_a.config.b_DMA_EN = 0;
    > + tx_list_head->status.status_word = 0;
    > + if (tx_list_head->skb) {
    > + dev_kfree_skb(tx_list_head->skb);
    > + tx_list_head->skb = NULL;
    > + } else {
    > + printk(KERN_ERR CARDNAME
    > + ": no sk_buff in a transmitted frame!\n");
    > + }
    > + tx_list_head = tx_list_head->next;
    > + } while (tx_list_head->status.status_word != 0
    > + && current_tx_ptr != tx_list_head);
    > + return;
    > +
    > +}
    > +
    > +static int bf537mac_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
    > +{
    > + struct bf537mac_local *lp = netdev_priv(dev);
    > + unsigned int data;
    > +
    > + current_tx_ptr->skb = skb;
    > + /* Is skb->data always 16-bit aligned? Do we need to memcpy((char *)(tail->packet + 2),skb->data,len)? */
    > + if ((((unsigned int)(skb->data)) & 0x02) == 2) {
    > + /* move skb->data to current_tx_ptr payload */
    > + data = (unsigned int)(skb->data) - 2;
    > + *((unsigned short *)data) = (unsigned short)(skb->len);
    > + current_tx_ptr->desc_a.start_addr = (unsigned long)data;
    > + blackfin_dcache_flush_range(data, (data + (skb->len)) + 2); /* this is important! */
    > +
    > + } else {
    > + *((unsigned short *)(current_tx_ptr->packet)) =
    > + (unsigned short)(skb->len);
    > + memcpy((char *)(current_tx_ptr->packet + 2), skb->data,
    > + (skb->len));
    > + current_tx_ptr->desc_a.start_addr =
    > + (unsigned long)current_tx_ptr->packet;
    > + if (current_tx_ptr->status.status_word != 0)
    > + current_tx_ptr->status.status_word = 0;
    > + blackfin_dcache_flush_range((unsigned int)current_tx_ptr->
    > + packet,
    > + (unsigned int)(current_tx_ptr->
    > + packet + skb->len) +
    > + 2);
    > + }
    > +
    > + current_tx_ptr->desc_a.config.b_DMA_EN = 1; /* enable this packet's dma */
    > +
    > + if (bfin_read_DMA2_IRQ_STATUS() & 0x08) { /* tx dma is running, just return */
    > + goto out;
    > + } else {
    > + /* tx dma is not running */
    > + bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a));
    > + /* dma enabled, read from memory, size is 6 */
    > + bfin_write_DMA2_CONFIG(*((unsigned short *)(&(current_tx_ptr->desc_a.config))));
    > + /* Turn on the EMAC tx */
    > + bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE);
    > + }
    > +
    > + out:
    > + adjust_tx_list();
    > + current_tx_ptr = current_tx_ptr->next;
    > + dev->trans_start = jiffies;
    > + lp->stats.tx_packets++;
    > + lp->stats.tx_bytes += (skb->len);
    > + return 0;
    > +}
    > +
    > +static void bf537mac_rx(struct net_device *dev)
    > +{
    > + struct sk_buff *skb, *new_skb;
    > + struct bf537mac_local *lp = netdev_priv(dev);
    > + unsigned short len;
    > +
    > + /* allocat a new skb for next time receive */
    > + skb = current_rx_ptr->skb;
    > + new_skb = dev_alloc_skb(PKT_BUF_SZ + 2);
    > + if (!new_skb) {
    > + printk(KERN_NOTICE CARDNAME
    > + ": rx: low on mem - packet dropped\n");
    > + lp->stats.rx_dropped++;
    > + goto out;
    > + }
    > + /* reserve 2 bytes for RXDWA padding */
    > + skb_reserve(new_skb, 2);
    > + current_rx_ptr->skb = new_skb;
    > + current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
    > +
    > +#if 0
    > + int i;
    > + if (len >= 64) {
    > + for (i=0;i<len;i++) {
    > + printk("%.2x-",((unsigned char *)pkt)[i]);
    > + if (((i%8)==0) && (i!=0)) printk("\n");
    > + }
    > + printk("\n");
    > + }
    > +#endif
    > +
    > + len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
    > + skb_put(skb, len);
    > + blackfin_dcache_invalidate_range((unsigned long)skb->head,
    > + (unsigned long)skb->tail);
    > +
    > + dev->last_rx = jiffies;
    > + skb->dev = dev;
    > + skb->protocol = eth_type_trans(skb, dev);
    > +#if defined(BFIN_MAC_CSUM_OFFLOAD)
    > + skb->csum = current_rx_ptr->status.ip_payload_csum;
    > + skb->ip_summed = CHECKSUM_PARTIAL;
    > +#endif
    > +
    > + netif_rx(skb);
    > + lp->stats.rx_packets++;
    > + lp->stats.rx_bytes += len;
    > + current_rx_ptr->status.status_word = 0x00000000;
    > + current_rx_ptr = current_rx_ptr->next;
    > +
    > + out:
    > + return;
    > +}
    > +
    > +/* interrupt routine to handle rx and error signal */
    > +static irqreturn_t bf537mac_interrupt(int irq, void *dev_id)
    > +{
    > + struct net_device *dev = dev_id;
    > + int number = 0;
    > +
    > + get_one_packet:
    > + if (current_rx_ptr->status.status_word == 0) { /* no more new packet received */
    > + if (number == 0) {
    > + if (current_rx_ptr->next->status.status_word != 0) {
    > + current_rx_ptr = current_rx_ptr->next;
    > + goto real_rx;
    > + }
    > + }
    > + bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
    > + DMA_DONE | DMA_ERR);
    > + return IRQ_HANDLED;
    > + }
    > +
    > + real_rx:
    > + bf537mac_rx(dev);
    > + number++;
    > + goto get_one_packet;
    > +}
    > +
    > +#ifdef CONFIG_NET_POLL_CONTROLLER
    > +static void bf537mac_poll(struct net_device *dev)
    > +{
    > + disable_irq(IRQ_MAC_RX);
    > + bf537mac_interrupt(IRQ_MAC_RX, dev);
    > + enable_irq(IRQ_MAC_RX);
    > +}
    > +#endif /* CONFIG_NET_POLL_CONTROLLER */
    > +
    > +static void bf537mac_reset(void)
    > +{
    > + unsigned int opmode;
    > +
    > + opmode = bfin_read_EMAC_OPMODE();
    > + opmode &= (~RE);
    > + opmode &= (~TE);
    > + /* Turn off the EMAC */
    > + bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() & opmode);
    > +}
    > +
    > +/*
    > + * Enable Interrupts, Receive, and Transmit
    > + */
    > +static int bf537mac_enable(struct net_device *dev)
    > +{
    > + u32 opmode;
    > +
    > + pr_debug("%s: %s\n", dev->name, __FUNCTION__);
    > +
    > + /* Set RX DMA */
    > + bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a));
    > + bfin_write_DMA1_CONFIG(*
    > + ((unsigned short
    > + *)(&(rx_list_head->desc_a.config))));
    > +
    > + /* Wait MII done */
    > + poll_mdc_done();
    > +
    > + /* We enable only RX here */
    > + /* ASTP : Enable Automatic Pad Stripping
    > + PR : Promiscuous Mode for test
    > + PSF : Receive frames with total length less than 64 bytes.
    > + FDMODE : Full Duplex Mode
    > + LB : Internal Loopback for test
    > + RE : Receiver Enable */
    > + opmode = bfin_read_EMAC_OPMODE();
    > + if (opmode & FDMODE)
    > + opmode |= PSF;
    > + else
    > + opmode |= DRO | DC | PSF;
    > + opmode |= RE;
    > +
    > +#if defined(CONFIG_BFIN_MAC_RMII)
    > + opmode |= RMII; /* For Now only 100MBit are supported */
    > +#ifdef CONFIG_BF_REV_0_2
    > + opmode |= TE;
    > +#endif
    > +#endif
    > + /* Turn on the EMAC rx */
    > + bfin_write_EMAC_OPMODE(opmode);
    > +
    > + return 0;
    > +}
    > +
    > +/* Our watchdog timed out. Called by the networking layer */
    > +static void bf537mac_timeout(struct net_device *dev)
    > +{
    > + pr_debug("%s: %s\n", dev->name, __FUNCTION__);
    > +
    > + bf537mac_reset();
    > +
    > + /* reset tx queue */
    > + tx_list_tail = tx_list_head->next;
    > +
    > + bf537mac_enable(dev);
    > +
    > + /* We can accept TX packets again */
    > + dev->trans_start = jiffies;
    > + netif_wake_queue(dev);
    > +}
    > +
    > +/*
    > + * Get the current statistics.
    > + * This may be called with the card open or closed.
    > + */
    > +static struct net_device_stats *bf537mac_query_statistics(struct net_device
    > + *dev)
    > +{
    > + struct bf537mac_local *lp = netdev_priv(dev);
    > +
    > + pr_debug("%s: %s\n", dev->name, __FUNCTION__);
    > +
    > + return &lp->stats;
    > +}
    > +
    > +/*
    > + * This routine will, depending on the values passed to it,
    > + * either make it accept multicast packets, go into
    > + * promiscuous mode (for TCPDUMP and cousins) or accept
    > + * a select set of multicast packets
    > + */
    > +static void bf537mac_set_multicast_list(struct net_device *dev)
    > +{
    > + u32 sysctl;
    > +
    > + if (dev->flags & IFF_PROMISC) {
    > + printk(KERN_INFO "%s: set to promisc mode\n", dev->name);
    > + sysctl = bfin_read_EMAC_OPMODE();
    > + sysctl |= RAF;
    > + bfin_write_EMAC_OPMODE(sysctl);
    > + } else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) {
    > + /* accept all multicast */
    > + sysctl = bfin_read_EMAC_OPMODE();
    > + sysctl |= PAM;
    > + bfin_write_EMAC_OPMODE(sysctl);
    > + } else if (dev->mc_count) {
    > + /* set multicast */
    > + } else {
    > + /* clear promisc or multicast mode */
    > + sysctl = bfin_read_EMAC_OPMODE();
    > + sysctl &= ~(RAF | PAM);
    > + bfin_write_EMAC_OPMODE(sysctl);
    > + }
    > +}
    > +
    > +/*
    > + * this puts the device in an inactive state
    > + */
    > +static void bf537mac_shutdown(struct net_device *dev)
    > +{
    > + /* Turn off the EMAC */
    > + bfin_write_EMAC_OPMODE(0x00000000);
    > + /* Turn off the EMAC RX DMA */
    > + bfin_write_DMA1_CONFIG(0x0000);
    > + bfin_write_DMA2_CONFIG(0x0000);
    > +}
    > +
    > +/*
    > + * Open and Initialize the interface
    > + *
    > + * Set up everything, reset the card, etc..
    > + */
    > +static int bf537mac_open(struct net_device *dev)
    > +{
    > + pr_debug("%s: %s\n", dev->name, __FUNCTION__);
    > +
    > + /*
    > + * Check that the address is valid. If its not, refuse
    > + * to bring the device up. The user must specify an
    > + * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
    > + */
    > + if (!is_valid_ether_addr(dev->dev_addr)) {
    > + printk(KERN_WARNING CARDNAME ": no valid ethernet hw addr\n");
    > + return -EINVAL;
    > + }
    > +
    > + /* initial rx and tx list */
    > + desc_list_init();
    > +
    > + bf537mac_setphy(dev);
    > + setup_system_regs(dev);
    > + bf537mac_reset();
    > + bf537mac_enable(dev);
    > +
    > + pr_debug("hardware init finished\n");
    > + netif_start_queue(dev);
    > + netif_carrier_on(dev);
    > +
    > + return 0;
    > +}
    > +
    > +/*
    > + *
    > + * this makes the board clean up everything that it can
    > + * and not talk to the outside world. Caused by
    > + * an 'ifconfig ethX down'
    > + */
    > +static int bf537mac_close(struct net_device *dev)
    > +{
    > + pr_debug("%s: %s\n", dev->name, __FUNCTION__);
    > +
    > + netif_stop_queue(dev);
    > + netif_carrier_off(dev);
    > +
    > + /* clear everything */
    > + bf537mac_shutdown(dev);
    > +
    > + /* free the rx/tx buffers */
    > + desc_list_free();
    > +
    > + return 0;
    > +}
    > +
    > +static int __init bf537mac_probe(struct net_device *dev)
    > +{
    > + struct bf537mac_local *lp = netdev_priv(dev);
    > + int retval;
    > +
    > + /* Grab the MAC address in the MAC */
    > + *(u32 *) (&(dev->dev_addr[0])) = bfin_read_EMAC_ADDRLO();
    > + *(u16 *) (&(dev->dev_addr[4])) = (u16) bfin_read_EMAC_ADDRHI();
    > +
    > +/* probe mac */
    > + /*todo: how to proble? which is revision_register */
    > + bfin_write_EMAC_ADDRLO(0x12345678);
    > + if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
    > + pr_debug("can't detect bf537 mac!\n");
    > + retval = -ENODEV;
    > + goto err_out;
    > + }
    > +
    > + /*Is it valid? (Did bootloader initialize it?) */
    > + if (!is_valid_ether_addr(dev->dev_addr)) {
    > + /* Grab the MAC from the board somehow - this is done in the
    > + arch/blackfin/boards/bf537/boardname.c */
    > + get_bf537_ether_addr(dev->dev_addr);
    > + }
    > +
    > + /* If still not valid, get a random one */
    > + if (!is_valid_ether_addr(dev->dev_addr)) {
    > + random_ether_addr(dev->dev_addr);
    > + }
    > +
    > + setup_mac_addr(dev->dev_addr);
    > +
    > + /* Fill in the fields of the device structure with ethernet values. */
    > + ether_setup(dev);
    > +
    > + dev->open = bf537mac_open;
    > + dev->stop = bf537mac_close;
    > + dev->hard_start_xmit = bf537mac_hard_start_xmit;
    > + dev->tx_timeout = bf537mac_timeout;
    > + dev->get_stats = bf537mac_query_statistics;
    > + dev->set_multicast_list = bf537mac_set_multicast_list;
    > +#if 0
    > + dev->ethtool_ops = &bf537mac_ethtool_ops;
    > +#endif
    > +#ifdef CONFIG_NET_POLL_CONTROLLER
    > + dev->poll_controller = bf537mac_poll;
    > +#endif
    > +
    > + /* fill in some of the fields */
    > + lp->version = 1;
    > + lp->PhyAddr = 0x01;
    > + lp->CLKIN = 25;
    > + lp->FullDuplex = 0;
    > + lp->Negotiate = 1;
    > + lp->FlowControl = 0;
    > + spin_lock_init(&lp->lock);
    > +
    > + /* set the GPIO pins to Ethernet mode */
    > + setup_pin_mux();
    > +
    > + /* now, enable interrupts */
    > + /* register irq handler */
    > + if (request_irq
    > + (IRQ_MAC_RX, bf537mac_interrupt, IRQF_DISABLED | IRQF_SHARED,
    > + "BFIN537_MAC_RX", dev)) {
    > + printk(KERN_WARNING CARDNAME
    > + ": Unable to attach BlackFin MAC RX interrupt\n");
    > + return -EBUSY;
    > + }
    > +
    > + /* Enable PHY output early */
    > + if (!(bfin_read_VR_CTL() & PHYCLKOE))
    > + bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
    > +
    > + retval = register_netdev(dev);
    > + if (retval == 0) {
    > + /* now, print out the card info, in a short format.. */
    > + printk(KERN_INFO "Blackfin mac net device registered\n");
    > + }
    > +
    > + err_out:
    > + return retval;
    > +}
    > +
    > +static int bfin_mac_probe(struct platform_device *pdev)
    > +{
    > + struct net_device *ndev;
    > +
    > + ndev = alloc_etherdev(sizeof(struct bf537mac_local));
    > +
    > + if (!ndev) {
    > + printk(KERN_WARNING CARDNAME ": could not allocate device\n");
    > + return -ENOMEM;
    > + }
    > +
    > + if (bf537mac_probe(ndev) != 0) {
    > + platform_set_drvdata(pdev, NULL);
    > + free_netdev(ndev);
    > + printk(KERN_WARNING CARDNAME ": not found\n");
    > + return -ENODEV;
    > + }
    > +
    > + SET_MODULE_OWNER(ndev);
    > + SET_NETDEV_DEV(ndev, &pdev->dev);
    > +
    > + platform_set_drvdata(pdev, ndev);
    > +
    > + return 0;
    > +}
    > +
    > +static int bfin_mac_remove(struct platform_device *pdev)
    > +{
    > + struct net_device *ndev = platform_get_drvdata(pdev);
    > +
    > + platform_set_drvdata(pdev, NULL);
    > +
    > + unregister_netdev(ndev);
    > +
    > + free_irq(IRQ_MAC_RX, ndev);
    > +
    > + free_netdev(ndev);
    > +
    > + return 0;
    > +}
    > +
    > +static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t state)
    > +{
    > + return 0;
    > +}
    > +
    > +static int bfin_mac_resume(struct platform_device *pdev)
    > +{
    > + return 0;
    > +}
    > +
    > +static struct platform_driver bfin_mac_driver = {
    > + .probe = bfin_mac_probe,
    > + .remove = bfin_mac_remove,
    > + .resume = bfin_mac_resume,
    > + .suspend = bfin_mac_suspend,
    > + .driver = {
    > + .name = CARDNAME,
    > + },
    > +};
    > +
    > +static int __init bfin_mac_init(void)
    > +{
    > + return platform_driver_register(&bfin_mac_driver);
    > +}
    > +
    > +module_init(bfin_mac_init);
    > +
    > +static void __exit bfin_mac_cleanup(void)
    > +{
    > + platform_driver_unregister(&bfin_mac_driver);
    > +}
    > +
    > +module_exit(bfin_mac_cleanup);
    > diff -puN /dev/null drivers/net/bfin_mac.h
    > --- /dev/null
    > +++ a/drivers/net/bfin_mac.h
    > @@ -0,0 +1,147 @@
    > +/*
    > + * File: drivers/net/bfin_mac.h
    > + * Based on:
    > + * Author: Luke Yang <luke.yang@analog.com>
    > + *
    > + * Created:
    > + * Description:
    > + *
    > + * Modified:
    > + * Copyright 2004-2006 Analog Devices Inc.
    > + *
    > + * Bugs: Enter bugs at http://blackfin.uclinux.org/
    > + *
    > + * 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, 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 ; see the file COPYING.
    > + * If not, write to the Free Software Foundation,
    > + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    > + */
    > +
    > +/*
    > + * PHY REGISTER NAMES
    > + */
    > +#define PHYREG_MODECTL 0x0000
    > +#define PHYREG_MODESTAT 0x0001
    > +#define PHYREG_PHYID1 0x0002
    > +#define PHYREG_PHYID2 0x0003
    > +#define PHYREG_ANAR 0x0004
    > +#define PHYREG_ANLPAR 0x0005
    > +#define PHYREG_ANER 0x0006
    > +#define PHYREG_NSR 0x0010
    > +#define PHYREG_LBREMR 0x0011
    > +#define PHYREG_REC 0x0012
    > +#define PHYREG_10CFG 0x0013
    > +#define PHYREG_PHY1_1 0x0014
    > +#define PHYREG_PHY1_2 0x0015
    > +#define PHYREG_PHY2 0x0016
    > +#define PHYREG_TW_1 0x0017
    > +#define PHYREG_TW_2 0x0018
    > +#define PHYREG_TEST 0x0019
    > +
    > +#define PHY_RESET 0x8000
    > +#define PHY_ANEG_EN 0x1000
    > +#define PHY_DUPLEX 0x0100
    > +#define PHY_SPD_SET 0x2000
    > +
    > +#define BFIN_MAC_CSUM_OFFLOAD
    > +
    > +typedef struct _DMA_CONFIG {
    > + unsigned short b_DMA_EN:1; /* Bit 0 : DMA Enable */
    > + unsigned short b_WNR:1; /* Bit 1 : DMA Direction */
    > + unsigned short b_WDSIZE:2; /* Bit 2 & 3 : DMA Tranfer Word size */
    > + unsigned short b_DMA2D:1; /* Bit 4 : DMA Mode 2D or 1D */
    > + unsigned short b_RESTART:1; /* Bit 5 : Retain the FIFO */
    > + unsigned short b_DI_SEL:1; /* Bit 6 : Data Interrupt Timing Select */
    > + unsigned short b_DI_EN:1; /* Bit 7 : Data Interrupt Enable */
    > + unsigned short b_NDSIZE:4; /* Bit 8 to 11 : Flex descriptor Size */
    > + unsigned short b_FLOW:3; /* Bit 12 to 14 : FLOW */
    > +} DMA_CONFIG_REG;
    > +
    > +struct dma_descriptor {
    > + struct dma_descriptor *next_dma_desc;
    > + unsigned long start_addr;
    > + DMA_CONFIG_REG config;
    > + unsigned short x_count;
    > +};
    > +
    > +#if 0
    > +struct status_area {
    > + unsigned short ip_hdr_chksum; /* the IP header checksum */
    > + unsigned short ip_payload_chksum; /* the IP header and payload checksum */
    > + unsigned long status_word; /* the frame status word */
    > +};
    > +#endif
    > +
    > +struct status_area_rx {
    > +#if defined(BFIN_MAC_CSUM_OFFLOAD)
    > + unsigned short ip_hdr_csum; /* ip header checksum */
    > + unsigned short ip_payload_csum; /* ip payload(udp or tcp or others) checksum */
    > +#endif
    > + unsigned long status_word; /* the frame status word */
    > +};
    > +
    > +struct status_area_tx {
    > + unsigned long status_word; /* the frame status word */
    > +};
    > +
    > +/* use two descriptors for a packet */
    > +struct net_dma_desc_rx {
    > + struct net_dma_desc_rx *next;
    > + struct sk_buff *skb;
    > + struct dma_descriptor desc_a;
    > + struct dma_descriptor desc_b;
    > + volatile struct status_area_rx status;
    > +};
    > +
    > +/* use two descriptors for a packet */
    > +struct net_dma_desc_tx {
    > + struct net_dma_desc_tx *next;
    > + struct sk_buff *skb;
    > + struct dma_descriptor desc_a;
    > + struct dma_descriptor desc_b;
    > + volatile unsigned char packet[1560];
    > + volatile struct status_area_tx status;
    > +};
    > +
    > +struct bf537mac_local {
    > + /*
    > + * these are things that the kernel wants me to keep, so users
    > + * can find out semi-useless statistics of how well the card is
    > + * performing
    > + */
    > + struct net_device_stats stats;
    > +
    > + int version;
    > +
    > + int FlowEnabled; /* record if data flow is active */
    > + int EtherIntIVG; /* IVG for the ethernet interrupt */
    > + int RXIVG; /* IVG for the RX completion */
    > + int TXIVG; /* IVG for the TX completion */
    > + int PhyAddr; /* PHY address */
    > + int OpMode; /* set these bits n the OPMODE regs */
    > + int Port10; /* set port speed to 10 Mbit/s */
    > + int GenChksums; /* IP checksums to be calculated */
    > + int NoRcveLnth; /* dont insert recv length at start of buffer */
    > + int StripPads; /* remove trailing pad bytes */
    > + int FullDuplex; /* set full duplex mode */
    > + int Negotiate; /* enable auto negotiation */
    > + int Loopback; /* loopback at the PHY */
    > + int Cache; /* Buffers may be cached */
    > + int FlowControl; /* flow control active */
    > + int CLKIN; /* clock in value in MHZ */
    > + unsigned short IntMask; /* interrupt mask */
    > + unsigned char Mac[6]; /* MAC address of the board */
    > + spinlock_t lock;
    > +};
    > +
    > +extern void get_bf537_ether_addr(char *addr);
    > _
    -
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