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/*
* Linux ARCnet driver - COM20020 chipset support
*
* Written 1997 by David Woodhouse.
* Written 1994-1999 by Avery Pennarun.
* Written 1999 by Martin Mares <mj@ucw.cz>.
* Derived from skeleton.c by Donald Becker.
*
* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
* for sponsoring the further development of this driver.
*
* **********************
*
* The original copyright of skeleton.c was as follows:
*
* skeleton.c Written 1993 by Donald Becker.
* Copyright 1993 United States Government as represented by the
* Director, National Security Agency. This software may only be used
* and distributed according to the terms of the GNU General Public License as
* modified by SRC, incorporated herein by reference.
*
* **********************
*
* For more details, see drivers/net/arcnet.c
*
* **********************
*/
#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include "arcdevice.h"
#include "com20020.h"
static const char * const clockrates[] = {
"XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s",
"1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s",
"Reserved", "Reserved", "Reserved"
};
static void com20020_command(struct net_device *dev, int command);
static int com20020_status(struct net_device *dev);
static void com20020_setmask(struct net_device *dev, int mask);
static int com20020_reset(struct net_device *dev, int really_reset);
static void com20020_copy_to_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count);
static void com20020_copy_from_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count);
static void com20020_set_mc_list(struct net_device *dev);
static void com20020_close(struct net_device *);
static void com20020_copy_from_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count)
{
int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
/* set up the address register */
arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag,
ioaddr, COM20020_REG_W_ADDR_HI);
arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
/* copy the data */
TIME(dev, "insb", count,
arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
}
static void com20020_copy_to_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count)
{
int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
/* set up the address register */
arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI);
arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);
/* copy the data */
TIME(dev, "outsb", count,
arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count));
}
/* Reset the card and check some basic stuff during the detection stage. */
int com20020_check(struct net_device *dev)
{
int ioaddr = dev->base_addr, status;
struct arcnet_local *lp = netdev_priv(dev);
arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
udelay(5);
arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG);
mdelay(RESETtime);
lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
lp->setup2 = (lp->clockm << 4) | 8;
/* CHECK: should we do this for SOHARD cards ? */
/* Enable P1Mode for backplane mode */
lp->setup = lp->setup | P1MODE;
com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
if (lp->clockm != 0) {
com20020_set_subaddress(lp, ioaddr, SUB_SETUP2);
arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG);
/* must now write the magic "restart operation" command */
mdelay(1);
arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND);
}
lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE;
/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG);
status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status);
return -ENODEV;
}
arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status);
arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
ioaddr, COM20020_REG_W_COMMAND);
status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS);
arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n",
status);
/* Read first location of memory */
arcnet_outb(0 | RDDATAflag | AUTOINCflag,
ioaddr, COM20020_REG_W_ADDR_HI);
arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO);
status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA);
if (status != TESTvalue) {
arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
status);
return -ENODEV;
}
return 0;
}
static int com20020_set_hwaddr(struct net_device *dev, void *addr)
{
int ioaddr = dev->base_addr;
struct arcnet_local *lp = netdev_priv(dev);
struct sockaddr *hwaddr = addr;
memcpy(dev->dev_addr, hwaddr->sa_data, 1);
com20020_set_subaddress(lp, ioaddr, SUB_NODE);
arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
return 0;
}
static int com20020_netdev_open(struct net_device *dev)
{
int ioaddr = dev->base_addr;
struct arcnet_local *lp = netdev_priv(dev);
lp->config |= TXENcfg;
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
return arcnet_open(dev);
}
static int com20020_netdev_close(struct net_device *dev)
{
int ioaddr = dev->base_addr;
struct arcnet_local *lp = netdev_priv(dev);
arcnet_close(dev);
/* disable transmitter */
lp->config &= ~TXENcfg;
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
return 0;
}
const struct net_device_ops com20020_netdev_ops = {
.ndo_open = com20020_netdev_open,
.ndo_stop = com20020_netdev_close,
.ndo_start_xmit = arcnet_send_packet,
.ndo_tx_timeout = arcnet_timeout,
.ndo_set_mac_address = com20020_set_hwaddr,
.ndo_set_rx_mode = com20020_set_mc_list,
};
/* Set up the struct net_device associated with this card. Called after
* probing succeeds.
*/
int com20020_found(struct net_device *dev, int shared)
{
struct arcnet_local *lp;
int ioaddr = dev->base_addr;
/* Initialize the rest of the device structure. */
lp = netdev_priv(dev);
lp->hw.owner = THIS_MODULE;
lp->hw.command = com20020_command;
lp->hw.status = com20020_status;
lp->hw.intmask = com20020_setmask;
lp->hw.reset = com20020_reset;
lp->hw.copy_to_card = com20020_copy_to_card;
lp->hw.copy_from_card = com20020_copy_from_card;
lp->hw.close = com20020_close;
/* FIXME: do this some other way! */
if (!dev->dev_addr[0])
dev->dev_addr[0] = arcnet_inb(ioaddr, 8);
com20020_set_subaddress(lp, ioaddr,
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