/*
|
* 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, SUB_SETUP1);
|
arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
|
|
if (lp->card_flags & ARC_CAN_10MBIT) {
|
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;
|
/* Default 0x38 + register: Node ID */
|
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
|
arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG);
|
|
/* reserve the irq */
|
if (request_irq(dev->irq, arcnet_interrupt, shared,
|
"arcnet (COM20020)", dev)) {
|
arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
|
return -ENODEV;
|
}
|
|
arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
|
lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
|
|
if (lp->backplane)
|
arc_printk(D_NORMAL, dev, "Using backplane mode.\n");
|
|
if (lp->timeout != 3)
|
arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n",
|
lp->timeout);
|
|
arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n",
|
lp->setup >> 1,
|
clockrates[3 -
|
((lp->setup2 & 0xF0) >> 4) +
|
((lp->setup & 0x0F) >> 1)]);
|
/* The clockrates array index looks very fragile.
|
* It seems like it could have negative indexing.
|
*/
|
|
if (register_netdev(dev)) {
|
free_irq(dev->irq, dev);
|
return -EIO;
|
}
|
return 0;
|
}
|
|
/* Do a hardware reset on the card, and set up necessary registers.
|
*
|
* This should be called as little as possible, because it disrupts the
|
* token on the network (causes a RECON) and requires a significant delay.
|
*
|
* However, it does make sure the card is in a defined state.
|
*/
|
static int com20020_reset(struct net_device *dev, int really_reset)
|
{
|
struct arcnet_local *lp = netdev_priv(dev);
|
u_int ioaddr = dev->base_addr;
|
u_char inbyte;
|
|
arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
|
__FILE__, __LINE__, __func__, dev, lp, dev->name);
|
arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
|
dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
|
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
|
lp->config |= (lp->timeout << 3) | (lp->backplane << 2);
|
/* power-up defaults */
|
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
|
|
if (really_reset) {
|
/* reset the card */
|
arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG);
|
udelay(5);
|
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
|
mdelay(RESETtime * 2);
|
/* COM20020 seems to be slower sometimes */
|
}
|
/* clear flags & end reset */
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
|
arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
|
ioaddr, COM20020_REG_W_COMMAND);
|
|
/* verify that the ARCnet signature byte is present */
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
|
|
com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
|
if (inbyte != TESTvalue) {
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n",
|
__FILE__, __LINE__, __func__);
|
arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
|
return 1;
|
}
|
/* enable extended (512-byte) packets */
|
arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND);
|
|
arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__);
|
|
/* done! return success. */
|
return 0;
|
}
|
|
static void com20020_setmask(struct net_device *dev, int mask)
|
{
|
u_int ioaddr = dev->base_addr;
|
|
arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr);
|
arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK);
|
}
|
|
static void com20020_command(struct net_device *dev, int cmd)
|
{
|
u_int ioaddr = dev->base_addr;
|
|
arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND);
|
}
|
|
static int com20020_status(struct net_device *dev)
|
{
|
u_int ioaddr = dev->base_addr;
|
|
return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) +
|
(arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8);
|
}
|
|
static void com20020_close(struct net_device *dev)
|
{
|
struct arcnet_local *lp = netdev_priv(dev);
|
int ioaddr = dev->base_addr;
|
|
/* disable transmitter */
|
lp->config &= ~TXENcfg;
|
arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
|
}
|
|
/* Set or clear the multicast filter for this adaptor.
|
* num_addrs == -1 Promiscuous mode, receive all packets
|
* num_addrs == 0 Normal mode, clear multicast list
|
* num_addrs > 0 Multicast mode, receive normal and MC packets, and do
|
* best-effort filtering.
|
* FIXME - do multicast stuff, not just promiscuous.
|
*/
|
static void com20020_set_mc_list(struct net_device *dev)
|
{
|
struct arcnet_local *lp = netdev_priv(dev);
|
int ioaddr = dev->base_addr;
|
|
if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) {
|
/* Enable promiscuous mode */
|
if (!(lp->setup & PROMISCset))
|
arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n");
|
com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
|
lp->setup |= PROMISCset;
|
arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
|
} else {
|
/* Disable promiscuous mode, use normal mode */
|
if ((lp->setup & PROMISCset))
|
arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n");
|
com20020_set_subaddress(lp, ioaddr, SUB_SETUP1);
|
lp->setup &= ~PROMISCset;
|
arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG);
|
}
|
}
|
|
#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
|
defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
|
defined(CONFIG_ARCNET_COM20020_CS_MODULE)
|
EXPORT_SYMBOL(com20020_check);
|
EXPORT_SYMBOL(com20020_found);
|
EXPORT_SYMBOL(com20020_netdev_ops);
|
#endif
|
|
MODULE_LICENSE("GPL");
|
|
#ifdef MODULE
|
|
static int __init com20020_module_init(void)
|
{
|
if (BUGLVL(D_NORMAL))
|
pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)");
|
return 0;
|
}
|
|
static void __exit com20020_module_exit(void)
|
{
|
}
|
module_init(com20020_module_init);
|
module_exit(com20020_module_exit);
|
#endif /* MODULE */
|
