419 lines
13 KiB
C
419 lines
13 KiB
C
/*
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* Linux ARCnet driver - COM20020 chipset support
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*
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* Written 1997 by David Woodhouse.
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* Written 1994-1999 by Avery Pennarun.
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* Written 1999 by Martin Mares <mj@ucw.cz>.
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* Derived from skeleton.c by Donald Becker.
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*
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* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
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* for sponsoring the further development of this driver.
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*
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* **********************
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*
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* The original copyright of skeleton.c was as follows:
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*
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* skeleton.c Written 1993 by Donald Becker.
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* Copyright 1993 United States Government as represented by the
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* Director, National Security Agency. This software may only be used
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* and distributed according to the terms of the GNU General Public License as
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* modified by SRC, incorporated herein by reference.
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*
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* **********************
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*
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* For more details, see drivers/net/arcnet.c
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*
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* **********************
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*/
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#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include "arcdevice.h"
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#include "com20020.h"
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static const char * const clockrates[] = {
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"XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s",
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"1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s",
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"Reserved", "Reserved", "Reserved"
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};
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static void com20020_command(struct net_device *dev, int command);
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static int com20020_status(struct net_device *dev);
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static void com20020_setmask(struct net_device *dev, int mask);
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static int com20020_reset(struct net_device *dev, int really_reset);
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static void com20020_copy_to_card(struct net_device *dev, int bufnum,
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int offset, void *buf, int count);
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static void com20020_copy_from_card(struct net_device *dev, int bufnum,
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int offset, void *buf, int count);
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static void com20020_set_mc_list(struct net_device *dev);
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static void com20020_close(struct net_device *);
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static void com20020_copy_from_card(struct net_device *dev, int bufnum,
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int offset, void *buf, int count)
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{
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int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
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/* set up the address register */
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arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag,
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ioaddr, COM20020_REG_W_ADDR_HI);
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arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
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/* copy the data */
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TIME(dev, "insb", count,
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arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
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}
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static void com20020_copy_to_card(struct net_device *dev, int bufnum,
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int offset, void *buf, int count)
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{
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int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
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/* set up the address register */
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arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI);
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arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
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/* copy the data */
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TIME(dev, "outsb", count,
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arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
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}
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/* Reset the card and check some basic stuff during the detection stage. */
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int com20020_check(struct net_device *dev)
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{
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int ioaddr = dev->base_addr, status;
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struct arcnet_local *lp = netdev_priv(dev);
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arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
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udelay(5);
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arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG);
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mdelay(RESETtime);
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lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
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lp->setup2 = (lp->clockm << 4) | 8;
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/* CHECK: should we do this for SOHARD cards ? */
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/* Enable P1Mode for backplane mode */
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lp->setup = lp->setup | P1MODE;
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
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if (lp->clockm != 0) {
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
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arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
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/* must now write the magic "restart operation" command */
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mdelay(1);
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arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
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}
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lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
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/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG);
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status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
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if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
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arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status);
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return -ENODEV;
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}
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arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status);
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arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
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ioaddr, COM20020_REG_W_COMMAND);
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status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
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arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n",
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status);
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/* Read first location of memory */
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arcnet_outb(0 | RDDATAflag | AUTOINCflag,
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ioaddr, COM20020_REG_W_ADDR_HI);
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arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO);
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status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA);
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if (status != TESTvalue) {
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arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
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status);
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return -ENODEV;
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}
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return 0;
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}
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static int com20020_set_hwaddr(struct net_device *dev, void *addr)
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{
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int ioaddr = dev->base_addr;
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struct arcnet_local *lp = netdev_priv(dev);
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struct sockaddr *hwaddr = addr;
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memcpy(dev->dev_addr, hwaddr->sa_data, 1);
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com20020_set_subaddress(lp, ioaddr, SUB_NODE);
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arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
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return 0;
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}
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static int com20020_netdev_open(struct net_device *dev)
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{
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int ioaddr = dev->base_addr;
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struct arcnet_local *lp = netdev_priv(dev);
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lp->config |= TXENcfg;
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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return arcnet_open(dev);
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}
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static int com20020_netdev_close(struct net_device *dev)
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{
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int ioaddr = dev->base_addr;
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struct arcnet_local *lp = netdev_priv(dev);
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arcnet_close(dev);
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/* disable transmitter */
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lp->config &= ~TXENcfg;
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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return 0;
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}
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const struct net_device_ops com20020_netdev_ops = {
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.ndo_open = com20020_netdev_open,
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.ndo_stop = com20020_netdev_close,
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.ndo_start_xmit = arcnet_send_packet,
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.ndo_tx_timeout = arcnet_timeout,
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.ndo_set_mac_address = com20020_set_hwaddr,
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.ndo_set_rx_mode = com20020_set_mc_list,
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};
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/* Set up the struct net_device associated with this card. Called after
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* probing succeeds.
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*/
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int com20020_found(struct net_device *dev, int shared)
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{
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struct arcnet_local *lp;
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int ioaddr = dev->base_addr;
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/* Initialize the rest of the device structure. */
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lp = netdev_priv(dev);
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lp->hw.owner = THIS_MODULE;
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lp->hw.command = com20020_command;
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lp->hw.status = com20020_status;
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lp->hw.intmask = com20020_setmask;
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lp->hw.reset = com20020_reset;
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lp->hw.copy_to_card = com20020_copy_to_card;
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lp->hw.copy_from_card = com20020_copy_from_card;
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lp->hw.close = com20020_close;
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/* FIXME: do this some other way! */
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if (!dev->dev_addr[0])
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dev->dev_addr[0] = arcnet_inb(ioaddr, 8);
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
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if (lp->card_flags & ARC_CAN_10MBIT) {
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
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arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
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/* must now write the magic "restart operation" command */
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mdelay(1);
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arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
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}
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lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
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/* Default 0x38 + register: Node ID */
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
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/* reserve the irq */
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if (request_irq(dev->irq, arcnet_interrupt, shared,
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"arcnet (COM20020)", dev)) {
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arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
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return -ENODEV;
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}
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arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
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lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
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if (lp->backplane)
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arc_printk(D_NORMAL, dev, "Using backplane mode.\n");
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if (lp->timeout != 3)
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arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n",
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lp->timeout);
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arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n",
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lp->setup >> 1,
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clockrates[3 -
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((lp->setup2 & 0xF0) >> 4) +
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((lp->setup & 0x0F) >> 1)]);
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/* The clockrates array index looks very fragile.
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* It seems like it could have negative indexing.
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*/
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if (register_netdev(dev)) {
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free_irq(dev->irq, dev);
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return -EIO;
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}
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return 0;
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}
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/* Do a hardware reset on the card, and set up necessary registers.
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*
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* This should be called as little as possible, because it disrupts the
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* token on the network (causes a RECON) and requires a significant delay.
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*
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* However, it does make sure the card is in a defined state.
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*/
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static int com20020_reset(struct net_device *dev, int really_reset)
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{
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struct arcnet_local *lp = netdev_priv(dev);
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u_int ioaddr = dev->base_addr;
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u_char inbyte;
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arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
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__FILE__, __LINE__, __func__, dev, lp, dev->name);
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arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
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dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
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lp->config |= (lp->timeout << 3) | (lp->backplane << 2);
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/* power-up defaults */
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
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if (really_reset) {
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/* reset the card */
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arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
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udelay(5);
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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mdelay(RESETtime * 2);
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/* COM20020 seems to be slower sometimes */
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}
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/* clear flags & end reset */
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
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arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
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ioaddr, COM20020_REG_W_COMMAND);
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/* verify that the ARCnet signature byte is present */
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
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com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
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if (inbyte != TESTvalue) {
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
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__FILE__, __LINE__, __func__);
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arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
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return 1;
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}
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/* enable extended (512-byte) packets */
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arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND);
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
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/* done! return success. */
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return 0;
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}
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static void com20020_setmask(struct net_device *dev, int mask)
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{
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u_int ioaddr = dev->base_addr;
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arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr);
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arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK);
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}
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static void com20020_command(struct net_device *dev, int cmd)
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{
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u_int ioaddr = dev->base_addr;
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arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND);
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}
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static int com20020_status(struct net_device *dev)
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{
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u_int ioaddr = dev->base_addr;
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return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) +
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(arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8);
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}
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static void com20020_close(struct net_device *dev)
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{
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struct arcnet_local *lp = netdev_priv(dev);
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int ioaddr = dev->base_addr;
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/* disable transmitter */
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lp->config &= ~TXENcfg;
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
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}
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/* Set or clear the multicast filter for this adaptor.
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* num_addrs == -1 Promiscuous mode, receive all packets
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* num_addrs == 0 Normal mode, clear multicast list
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* num_addrs > 0 Multicast mode, receive normal and MC packets, and do
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* best-effort filtering.
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* FIXME - do multicast stuff, not just promiscuous.
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*/
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static void com20020_set_mc_list(struct net_device *dev)
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{
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struct arcnet_local *lp = netdev_priv(dev);
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int ioaddr = dev->base_addr;
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if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {
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/* Enable promiscuous mode */
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if (!(lp->setup & PROMISCset))
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arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n");
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
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lp->setup |= PROMISCset;
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
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} else {
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/* Disable promiscuous mode, use normal mode */
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if ((lp->setup & PROMISCset))
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arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n");
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
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lp->setup &= ~PROMISCset;
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
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}
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}
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#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
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defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
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defined(CONFIG_ARCNET_COM20020_CS_MODULE)
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EXPORT_SYMBOL(com20020_check);
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EXPORT_SYMBOL(com20020_found);
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EXPORT_SYMBOL(com20020_netdev_ops);
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#endif
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MODULE_LICENSE("GPL");
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#ifdef MODULE
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static int __init com20020_module_init(void)
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{
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if (BUGLVL(D_NORMAL))
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pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)");
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return 0;
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}
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static void __exit com20020_module_exit(void)
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{
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}
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module_init(com20020_module_init);
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module_exit(com20020_module_exit);
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#endif /* MODULE */
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