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|
/*
* Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)
*
* 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
*
* **********************
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/arcdevice.h>
#define VERSION "arcnet: COM90xx chipset support\n"
/* Define this to speed up the autoprobe by assuming if only one io port and
* shmem are left in the list at Stage 5, they must correspond to each
* other.
*
* This is undefined by default because it might not always be true, and the
* extra check makes the autoprobe even more careful. Speed demons can turn
* it on - I think it should be fine if you only have one ARCnet card
* installed.
*
* If no ARCnet cards are installed, this delay never happens anyway and thus
* the option has no effect.
*/
#undef FAST_PROBE
/* Internal function declarations */
static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
static void com90xx_command(struct net_device *dev, int command);
static int com90xx_status(struct net_device *dev);
static void com90xx_setmask(struct net_device *dev, int mask);
static int com90xx_reset(struct net_device *dev, int really_reset);
static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count);
static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count);
/* Known ARCnet cards */
static struct net_device *cards[16];
static int numcards;
/* Handy defines for ARCnet specific stuff */
/* The number of low I/O ports used by the card */
#define ARCNET_TOTAL_SIZE 16
/* Amount of I/O memory used by the card */
#define BUFFER_SIZE (512)
#define MIRROR_SIZE (BUFFER_SIZE*4)
/* COM 9026 controller chip --> ARCnet register addresses */
#define _INTMASK (ioaddr+0) /* writable */
#define _STATUS (ioaddr+0) /* readable */
#define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */
#define _CONFIG (ioaddr+2) /* Configuration register */
#define _RESET (ioaddr+8) /* software reset (on read) */
#define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */
#define _ADDR_HI (ioaddr+15) /* Control registers for said */
#define _ADDR_LO (ioaddr+14)
#undef ASTATUS
#undef ACOMMAND
#undef AINTMASK
#define ASTATUS() inb(_STATUS)
#define ACOMMAND(cmd) outb((cmd),_COMMAND)
#define AINTMASK(msk) outb((msk),_INTMASK)
static int com90xx_skip_probe __initdata = 0;
/* Module parameters */
static int io; /* use the insmod io= irq= shmem= options */
static int irq;
static int shmem;
static char device[9]; /* use eg. device=arc1 to change name */
module_param(io, int, 0);
module_param(irq, int, 0);
module_param(shmem, int, 0);
module_param_string(device, device, sizeof(device), 0);
static void __init com90xx_probe(void)
{
int count, status, ioaddr, numprint, airq, openparen = 0;
unsigned long airqmask;
int ports[(0x3f0 - 0x200) / 16 + 1] =
{0};
unsigned long *shmems;
void __iomem **iomem;
int numports, numshmems, *port;
u_long *p;
int index;
if (!io && !irq && !shmem && !*device && com90xx_skip_probe)
return;
shmems = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(unsigned long),
GFP_KERNEL);
if (!shmems)
return;
iomem = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(void __iomem *),
GFP_KERNEL);
if (!iomem) {
kfree(shmems);
return;
}
BUGLVL(D_NORMAL) printk(VERSION);
/* set up the arrays where we'll store the possible probe addresses */
numports = numshmems = 0;
if (io)
ports[numports++] = io;
else
for (count = 0x200; count <= 0x3f0; count += 16)
ports[numports++] = count;
if (shmem)
shmems[numshmems++] = shmem;
else
for (count = 0xA0000; count <= 0xFF800; count += 2048)
shmems[numshmems++] = count;
/* Stage 1: abandon any reserved ports, or ones with status==0xFF
* (empty), and reset any others by reading the reset port.
*/
numprint = -1;
for (port = &ports[0]; port - ports < numports; port++) {
numprint++;
numprint %= 8;
if (!numprint) {
BUGMSG2(D_INIT, "\n");
BUGMSG2(D_INIT, "S1: ");
}
BUGMSG2(D_INIT, "%Xh ", *port);
ioaddr = *port;
if (!request_region(*port, ARCNET_TOTAL_SIZE, "arcnet (90xx)")) {
BUGMSG2(D_INIT_REASONS, "(request_region)\n");
BUGMSG2(D_INIT_REASONS, "S1: ");
BUGLVL(D_INIT_REASONS) numprint = 0;
*port-- = ports[--numports];
continue;
}
if (ASTATUS() == 0xFF) {
BUGMSG2(D_INIT_REASONS, "(empty)\n");
BUGMSG2(D_INIT_REASONS, "S1: ");
BUGLVL(D_INIT_REASONS) numprint = 0;
release_region(*port, ARCNET_TOTAL_SIZE);
*port-- = ports[--numports];
continue;
}
inb(_RESET); /* begin resetting card */
BUGMSG2(D_INIT_REASONS, "\n");
BUGMSG2(D_INIT_REASONS, "S1: ");
BUGLVL(D_INIT_REASONS) numprint = 0;
}
BUGMSG2(D_INIT, "\n");
if (!numports) {
BUGMSG2(D_NORMAL, "S1: No ARCnet cards found.\n");
kfree(shmems);
kfree(iomem);
return;
}
/* Stage 2: we have now reset any possible ARCnet cards, so we can't
* do anything until they finish. If D_INIT, print the list of
* cards that are left.
*/
numprint = -1;
for (port = &ports[0]; port < ports + numports; port++) {
numprint++;
numprint %= 8;
if (!numprint) {
BUGMSG2(D_INIT, "\n");
BUGMSG2(D_INIT, "S2: ");
}
BUGMSG2(D_INIT, "%Xh ", *port);
}
BUGMSG2(D_INIT, "\n");
mdelay(RESETtime);
/*
|