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linux/drivers/net/arcnet/com20020_cs.c
Michael Grzeschik c51da42a63 ARCNET: add support for multi interfaces on com20020 
The com20020-pci driver is currently designed to instance
one netdev with one pci device. This patch adds support to
instance many cards with one pci device, depending on the device
data in the private data.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-29 14:36:26 -04:00

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7.6 KiB
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/*
* Linux ARCnet driver - COM20020 PCMCIA support
*
* Written 1994-1999 by Avery Pennarun,
* based on an ISA version by David Woodhouse.
* Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
* which was derived from pcnet_cs.c by David Hinds.
* Some additional portions 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.
*
* **********************
* Changes:
* Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
* - reorganize kmallocs in com20020_attach, checking all for failure
* and releasing the previous allocations if one fails
* **********************
*
* For more details, see drivers/net/arcnet.c
*
* **********************
*/
#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/arcdevice.h>
#include <linux/com20020.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <asm/io.h>
#define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
static void regdump(struct net_device *dev)
{
#ifdef DEBUG
int ioaddr = dev->base_addr;
int count;
netdev_dbg(dev, "register dump:\n");
for (count = ioaddr; count < ioaddr + 16; count++)
{
if (!(count % 16))
pr_cont("%04X:", count);
pr_cont(" %02X", inb(count));
}
pr_cont("\n");
netdev_dbg(dev, "buffer0 dump:\n");
/* set up the address register */
count = 0;
outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
outb(count & 0xff, _ADDR_LO);
for (count = 0; count < 256+32; count++)
{
if (!(count % 16))
pr_cont("%04X:", count);
/* copy the data */
pr_cont(" %02X", inb(_MEMDATA));
}
pr_cont("\n");
#endif
}
/*====================================================================*/
/* Parameters that can be set with 'insmod' */
static int node;
static int timeout = 3;
static int backplane;
static int clockp;
static int clockm;
module_param(node, int, 0);
module_param(timeout, int, 0);
module_param(backplane, int, 0);
module_param(clockp, int, 0);
module_param(clockm, int, 0);
MODULE_LICENSE("GPL");
/*====================================================================*/
static int com20020_config(struct pcmcia_device *link);
static void com20020_release(struct pcmcia_device *link);
static void com20020_detach(struct pcmcia_device *p_dev);
/*====================================================================*/
static int com20020_probe(struct pcmcia_device *p_dev)
{
struct com20020_dev *info;
struct net_device *dev;
struct arcnet_local *lp;
dev_dbg(&p_dev->dev, "com20020_attach()\n");
/* Create new network device */
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
goto fail_alloc_info;
dev = alloc_arcdev("");
if (!dev)
goto fail_alloc_dev;
lp = netdev_priv(dev);
lp->timeout = timeout;
lp->backplane = backplane;
lp->clockp = clockp;
lp->clockm = clockm & 3;
lp->hw.owner = THIS_MODULE;
/* fill in our module parameters as defaults */
dev->dev_addr[0] = node;
p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
p_dev->resource[0]->end = 16;
p_dev->config_flags |= CONF_ENABLE_IRQ;
info->dev = dev;
p_dev->priv = info;
return com20020_config(p_dev);
fail_alloc_dev:
kfree(info);
fail_alloc_info:
return -ENOMEM;
} /* com20020_attach */
static void com20020_detach(struct pcmcia_device *link)
{
struct com20020_dev *info = link->priv;
struct net_device *dev = info->dev;
dev_dbg(&link->dev, "detach...\n");
dev_dbg(&link->dev, "com20020_detach\n");
dev_dbg(&link->dev, "unregister...\n");
unregister_netdev(dev);
/*
* this is necessary because we register our IRQ separately
* from card services.
*/
if (dev->irq)
free_irq(dev->irq, dev);
com20020_release(link);
/* Unlink device structure, free bits */
dev_dbg(&link->dev, "unlinking...\n");
if (link->priv)
{
dev = info->dev;
if (dev)
{
dev_dbg(&link->dev, "kfree...\n");
free_netdev(dev);
}
dev_dbg(&link->dev, "kfree2...\n");
kfree(info);
}
} /* com20020_detach */
static int com20020_config(struct pcmcia_device *link)
{
struct arcnet_local *lp;
struct com20020_dev *info;
struct net_device *dev;
int i, ret;
int ioaddr;
info = link->priv;
dev = info->dev;
dev_dbg(&link->dev, "config...\n");
dev_dbg(&link->dev, "com20020_config\n");
dev_dbg(&link->dev, "baseport1 is %Xh\n",
(unsigned int) link->resource[0]->start);
i = -ENODEV;
link->io_lines = 16;
if (!link->resource[0]->start)
{
for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
{
link->resource[0]->start = ioaddr;
i = pcmcia_request_io(link);
if (i == 0)
break;
}
}
else
i = pcmcia_request_io(link);
if (i != 0)
{
dev_dbg(&link->dev, "requestIO failed totally!\n");
goto failed;
}
ioaddr = dev->base_addr = link->resource[0]->start;
dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);
dev_dbg(&link->dev, "request IRQ %d\n",
link->irq);
if (!link->irq)
{
dev_dbg(&link->dev, "requestIRQ failed totally!\n");
goto failed;
}
dev->irq = link->irq;
ret = pcmcia_enable_device(link);
if (ret)
goto failed;
if (com20020_check(dev))
{
regdump(dev);
goto failed;
}
lp = netdev_priv(dev);
lp->card_name = "PCMCIA COM20020";
lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */
SET_NETDEV_DEV(dev, &link->dev);
i = com20020_found(dev, 0); /* calls register_netdev */
if (i != 0) {
dev_notice(&link->dev,
"com20020_found() failed\n");
goto failed;
}
netdev_dbg(dev, "port %#3lx, irq %d\n",
dev->base_addr, dev->irq);
return 0;
failed:
dev_dbg(&link->dev, "com20020_config failed...\n");
com20020_release(link);
return -ENODEV;
} /* com20020_config */
static void com20020_release(struct pcmcia_device *link)
{
dev_dbg(&link->dev, "com20020_release\n");
pcmcia_disable_device(link);
}
static int com20020_suspend(struct pcmcia_device *link)
{
struct com20020_dev *info = link->priv;
struct net_device *dev = info->dev;
if (link->open)
netif_device_detach(dev);
return 0;
}
static int com20020_resume(struct pcmcia_device *link)
{
struct com20020_dev *info = link->priv;
struct net_device *dev = info->dev;
if (link->open) {
int ioaddr = dev->base_addr;
struct arcnet_local *lp = netdev_priv(dev);
ARCRESET;
}
return 0;
}
static const struct pcmcia_device_id com20020_ids[] = {
PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
"PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
PCMCIA_DEVICE_PROD_ID12("SoHard AG",
"SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, com20020_ids);
static struct pcmcia_driver com20020_cs_driver = {
.owner = THIS_MODULE,
.name = "com20020_cs",
.probe = com20020_probe,
.remove = com20020_detach,
.id_table = com20020_ids,
.suspend = com20020_suspend,
.resume = com20020_resume,
};
module_pcmcia_driver(com20020_cs_driver);
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