/*
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* Linux ARCnet driver - COM20020 chipset support
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*
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* Written 1997 by David Woodhouse.
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* Written 1994-1999 by Avery Pennarun.
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* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
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* Derived from skeleton.c by Donald Becker.
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*
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* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
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* for sponsoring the further development of this driver.
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*
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* **********************
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*
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* The original copyright of skeleton.c was as follows:
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*
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* skeleton.c Written 1993 by Donald Becker.
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* Copyright 1993 United States Government as represented by the
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* Director, National Security Agency. This software may only be used
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* and distributed according to the terms of the GNU General Public License as
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* modified by SRC, incorporated herein by reference.
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*
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* **********************
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*
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* For more details, see drivers/net/arcnet.c
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*
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* **********************
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*/
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#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/bootmem.h>
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#include <linux/io.h>
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#include "arcdevice.h"
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#include "com20020.h"
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/* We cannot (yet) probe for an IO mapped card, although we can check that
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* it's where we were told it was, and even do autoirq.
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*/
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static int __init com20020isa_probe(struct net_device *dev)
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{
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int ioaddr;
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unsigned long airqmask;
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struct arcnet_local *lp = netdev_priv(dev);
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int err;
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if (BUGLVL(D_NORMAL))
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pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)");
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ioaddr = dev->base_addr;
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if (!ioaddr) {
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arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");
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return -ENODEV;
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}
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if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
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arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n",
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ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
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return -ENXIO;
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}
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if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
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arc_printk(D_NORMAL, dev, "IO address %x empty\n", ioaddr);
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err = -ENODEV;
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goto out;
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}
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if (com20020_check(dev)) {
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err = -ENODEV;
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goto out;
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}
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if (!dev->irq) {
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/* if we do this, we're sure to get an IRQ since the
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* card has just reset and the NORXflag is on until
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* we tell it to start receiving.
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*/
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arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n",
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arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
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arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
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airqmask = probe_irq_on();
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arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
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udelay(1);
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arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
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dev->irq = probe_irq_off(airqmask);
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if ((int)dev->irq <= 0) {
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arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n");
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airqmask = probe_irq_on();
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arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
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udelay(5);
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arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
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dev->irq = probe_irq_off(airqmask);
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if ((int)dev->irq <= 0) {
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arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n");
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err = -ENODEV;
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goto out;
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}
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}
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}
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lp->card_name = "ISA COM20020";
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err = com20020_found(dev, 0);
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if (err != 0)
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goto out;
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return 0;
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out:
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release_region(ioaddr, ARCNET_TOTAL_SIZE);
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return err;
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}
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static int node = 0;
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static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
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static int irq = 0; /* or use the insmod io= irq= shmem= options */
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static char device[9]; /* use eg. device="arc1" to change name */
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static int timeout = 3;
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static int backplane = 0;
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static int clockp = 0;
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static int clockm = 0;
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module_param(node, int, 0);
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module_param_hw(io, int, ioport, 0);
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module_param_hw(irq, int, irq, 0);
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module_param_string(device, device, sizeof(device), 0);
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module_param(timeout, int, 0);
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module_param(backplane, int, 0);
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module_param(clockp, int, 0);
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module_param(clockm, int, 0);
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MODULE_LICENSE("GPL");
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static struct net_device *my_dev;
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static int __init com20020_init(void)
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{
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struct net_device *dev;
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struct arcnet_local *lp;
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dev = alloc_arcdev(device);
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if (!dev)
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return -ENOMEM;
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if (node && node != 0xff)
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dev->dev_addr[0] = node;
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dev->netdev_ops = &com20020_netdev_ops;
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lp = netdev_priv(dev);
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lp->backplane = backplane;
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lp->clockp = clockp & 7;
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lp->clockm = clockm & 3;
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lp->timeout = timeout & 3;
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lp->hw.owner = THIS_MODULE;
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dev->base_addr = io;
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dev->irq = irq;
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if (dev->irq == 2)
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dev->irq = 9;
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if (com20020isa_probe(dev)) {
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free_netdev(dev);
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return -EIO;
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}
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my_dev = dev;
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return 0;
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}
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static void __exit com20020_exit(void)
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{
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unregister_netdev(my_dev);
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free_irq(my_dev->irq, my_dev);
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release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
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free_netdev(my_dev);
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}
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#ifndef MODULE
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static int __init com20020isa_setup(char *s)
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{
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int ints[8];
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s = get_options(s, 8, ints);
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if (!ints[0])
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return 1;
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switch (ints[0]) {
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default: /* ERROR */
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pr_info("Too many arguments\n");
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case 6: /* Timeout */
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timeout = ints[6];
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case 5: /* CKP value */
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clockp = ints[5];
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case 4: /* Backplane flag */
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backplane = ints[4];
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case 3: /* Node ID */
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node = ints[3];
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case 2: /* IRQ */
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irq = ints[2];
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case 1: /* IO address */
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io = ints[1];
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}
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if (*s)
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snprintf(device, sizeof(device), "%s", s);
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return 1;
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}
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__setup("com20020=", com20020isa_setup);
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#endif /* MODULE */
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module_init(com20020_init)
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module_exit(com20020_exit)
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