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linux-sg2042/drivers/net/pcmcia/com20020_cs.c

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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/init.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/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <asm/io.h>
#include <asm/system.h>
#define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
#ifdef DEBUG
static void regdump(struct net_device *dev)
{
int ioaddr = dev->base_addr;
int count;
printk("com20020 register dump:\n");
for (count = ioaddr; count < ioaddr + 16; count++)
{
if (!(count % 16))
printk("\n%04X: ", count);
printk("%02X ", inb(count));
}
printk("\n");
printk("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))
printk("\n%04X: ", count);
/* copy the data */
printk("%02X ", inb(_MEMDATA));
}
printk("\n");
}
#else
static inline void regdump(struct net_device *dev) { }
#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);
/*====================================================================*/
typedef struct com20020_dev_t {
struct net_device *dev;
} com20020_dev_t;
/*======================================================================
com20020_attach() creates an "instance" of the driver, allocating
local data structures for one device. The device is registered
with Card Services.
======================================================================*/
static int com20020_probe(struct pcmcia_device *p_dev)
{
com20020_dev_t *info;
struct net_device *dev;
struct arcnet_local *lp;
dev_dbg(&p_dev->dev, "com20020_attach()\n");
/* Create new network device */
info = kzalloc(sizeof(struct com20020_dev_t), 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->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
p_dev->io.NumPorts1 = 16;
p_dev->io.IOAddrLines = 16;
p_dev->conf.Attributes = CONF_ENABLE_IRQ;
p_dev->conf.IntType = INT_MEMORY_AND_IO;
info->dev = dev;
p_dev->priv = info;
return com20020_config(p_dev);
fail_alloc_dev:
kfree(info);
fail_alloc_info:
return -ENOMEM;
} /* com20020_attach */
/*======================================================================
This deletes a driver "instance". The device is de-registered
with Card Services. If it has been released, all local data
structures are freed. Otherwise, the structures will be freed
when the device is released.
======================================================================*/
static void com20020_detach(struct pcmcia_device *link)
{
struct com20020_dev_t *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 */
/*======================================================================
com20020_config() is scheduled to run after a CARD_INSERTION event
is received, to configure the PCMCIA socket, and to make the
device available to the system.
======================================================================*/
static int com20020_config(struct pcmcia_device *link)
{
struct arcnet_local *lp;
com20020_dev_t *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", link->io.BasePort1);
i = -ENODEV;
if (!link->io.BasePort1)
{
for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
{
link->io.BasePort1 = ioaddr;
i = pcmcia_request_io(link, &link->io);
if (i == 0)
break;
}
}
else
i = pcmcia_request_io(link, &link->io);
if (i != 0)
{
dev_dbg(&link->dev, "requestIO failed totally!\n");
goto failed;
}
ioaddr = dev->base_addr = link->io.BasePort1;
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_request_configuration(link, &link->conf);
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_printk(KERN_NOTICE, &link->dev,
"com20020_cs: com20020_found() failed\n");
goto failed;
}
dev_dbg(&link->dev,KERN_INFO "%s: port %#3lx, irq %d\n",
dev->name, dev->base_addr, dev->irq);
return 0;
failed:
dev_dbg(&link->dev, "com20020_config failed...\n");
com20020_release(link);
return -ENODEV;
} /* com20020_config */
/*======================================================================
After a card is removed, com20020_release() will unregister the net
device, and release the PCMCIA configuration. If the device is
still open, this will be postponed until it is closed.
======================================================================*/
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)
{
com20020_dev_t *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)
{
com20020_dev_t *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 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,
.drv = {
.name = "com20020_cs",
},
.probe = com20020_probe,
.remove = com20020_detach,
.id_table = com20020_ids,
.suspend = com20020_suspend,
.resume = com20020_resume,
};
static int __init init_com20020_cs(void)
{
return pcmcia_register_driver(&com20020_cs_driver);
}
static void __exit exit_com20020_cs(void)
{
pcmcia_unregister_driver(&com20020_cs_driver);
}
module_init(init_com20020_cs);
module_exit(exit_com20020_cs);
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