com20020-isa.c
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上传日期:2013-02-24
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文件大小:5k
- /*
- * Linux ARCnet driver - COM20020 chipset support
- *
- * Written 1997 by David Woodhouse.
- * Written 1994-1999 by Avery Pennarun.
- * Written 1999-2000 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/kernel.h>
- #include <linux/types.h>
- #include <linux/ioport.h>
- #include <linux/slab.h>
- #include <linux/errno.h>
- #include <linux/delay.h>
- #include <linux/netdevice.h>
- #include <linux/init.h>
- #include <linux/bootmem.h>
- #include <linux/arcdevice.h>
- #include <linux/com20020.h>
- #include <asm/io.h>
- #define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)n"
- /*
- * We cannot (yet) probe for an IO mapped card, although we can check that
- * it's where we were told it was, and even do autoirq.
- */
- static int __init com20020isa_probe(struct net_device *dev)
- {
- int ioaddr;
- unsigned long airqmask;
- struct arcnet_local *lp = dev->priv;
- #ifndef MODULE
- arcnet_init();
- #endif
- BUGLVL(D_NORMAL) printk(VERSION);
- ioaddr = dev->base_addr;
- if (!ioaddr) {
- BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
- "must specify the base address!n");
- return -ENODEV;
- }
- if (check_region(ioaddr, ARCNET_TOTAL_SIZE)) {
- BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.n",
- ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
- return -ENXIO;
- }
- if (ASTATUS() == 0xFF) {
- BUGMSG(D_NORMAL, "IO address %x emptyn", ioaddr);
- return -ENODEV;
- }
- if (com20020_check(dev))
- return -ENODEV;
- if (!dev->irq) {
- /* if we do this, we're sure to get an IRQ since the
- * card has just reset and the NORXflag is on until
- * we tell it to start receiving.
- */
- BUGMSG(D_INIT_REASONS, "intmask was %02Xhn", inb(_INTMASK));
- outb(0, _INTMASK);
- airqmask = probe_irq_on();
- outb(NORXflag, _INTMASK);
- udelay(1);
- outb(0, _INTMASK);
- dev->irq = probe_irq_off(airqmask);
- if (dev->irq <= 0) {
- BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first timen");
- airqmask = probe_irq_on();
- outb(NORXflag, _INTMASK);
- udelay(5);
- outb(0, _INTMASK);
- dev->irq = probe_irq_off(airqmask);
- if (dev->irq <= 0) {
- BUGMSG(D_NORMAL, "Autoprobe IRQ failed.n");
- return -ENODEV;
- }
- }
- }
- lp->card_name = "ISA COM20020";
- return com20020_found(dev, 0);
- }
- #ifdef MODULE
- static struct net_device *my_dev;
- /* Module parameters */
- static int node = 0;
- static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
- static int irq = 0; /* or use the insmod io= irq= shmem= options */
- static char *device; /* use eg. device="arc1" to change name */
- static int timeout = 3;
- static int backplane = 0;
- static int clockp = 0;
- static int clockm = 0;
- MODULE_PARM(node, "i");
- MODULE_PARM(io, "i");
- MODULE_PARM(irq, "i");
- MODULE_PARM(device, "s");
- MODULE_PARM(timeout, "i");
- MODULE_PARM(backplane, "i");
- MODULE_PARM(clockp, "i");
- MODULE_PARM(clockm, "i");
- static void com20020isa_open_close(struct net_device *dev, bool open)
- {
- if (open)
- MOD_INC_USE_COUNT;
- else
- MOD_DEC_USE_COUNT;
- }
- int init_module(void)
- {
- struct net_device *dev;
- struct arcnet_local *lp;
- int err;
- dev = dev_alloc(device ? : "arc%d", &err);
- if (!dev)
- return err;
- lp = dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
- if (!lp)
- return -ENOMEM;
- memset(lp, 0, sizeof(struct arcnet_local));
- if (node && node != 0xff)
- dev->dev_addr[0] = node;
- lp->backplane = backplane;
- lp->clockp = clockp & 7;
- lp->clockm = clockm & 3;
- lp->timeout = timeout & 3;
- lp->hw.open_close_ll = com20020isa_open_close;
- dev->base_addr = io;
- dev->irq = irq;
- if (dev->irq == 2)
- dev->irq = 9;
- if (com20020isa_probe(dev))
- return -EIO;
- my_dev = dev;
- return 0;
- }
- void cleanup_module(void)
- {
- com20020_remove(my_dev);
- }
- #else
- static int __init com20020isa_setup(char *s)
- {
- struct net_device *dev;
- struct arcnet_local *lp;
- int ints[8];
- s = get_options(s, 8, ints);
- if (!ints[0])
- return 1;
- dev = alloc_bootmem(sizeof(struct net_device) + sizeof(struct arcnet_local));
- memset(dev, 0, sizeof(struct net_device) + sizeof(struct arcnet_local));
- lp = dev->priv = (struct arcnet_local *) (dev + 1);
- dev->init = com20020isa_probe;
- switch (ints[0]) {
- default: /* ERROR */
- printk("com90xx: Too many arguments.n");
- case 6: /* Timeout */
- lp->timeout = ints[6];
- case 5: /* CKP value */
- lp->clockp = ints[5];
- case 4: /* Backplane flag */
- lp->backplane = ints[4];
- case 3: /* Node ID */
- dev->dev_addr[0] = ints[3];
- case 2: /* IRQ */
- dev->irq = ints[2];
- case 1: /* IO address */
- dev->base_addr = ints[1];
- }
- if (*s)
- strncpy(dev->name, s, 9);
- else
- strcpy(dev->name, "arc%d");
- if (register_netdev(dev))
- printk(KERN_ERR "com20020: Cannot register arcnet devicen");
- return 1;
- }
- __setup("com20020=", com20020isa_setup);
- #endif /* MODULE */