--- /dev/null
+/*
+ * 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/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.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 = netdev_priv(dev);
+ int err;
+
+ 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 (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
+ 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 empty\n", ioaddr);
+ err = -ENODEV;
+ goto out;
+ }
+ if (com20020_check(dev)) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ 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 %02Xh\n", inb(_INTMASK));
+ outb(0, _INTMASK);
+ airqmask = probe_irq_on();
+ outb(NORXflag, _INTMASK);
+ udelay(1);
+ outb(0, _INTMASK);
+ dev->irq = probe_irq_off(airqmask);
+
+ if ((int)dev->irq <= 0) {
+ BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
+ airqmask = probe_irq_on();
+ outb(NORXflag, _INTMASK);
+ udelay(5);
+ outb(0, _INTMASK);
+ dev->irq = probe_irq_off(airqmask);
+ if ((int)dev->irq <= 0) {
+ BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
+ err = -ENODEV;
+ goto out;
+ }
+ }
+ }
+
+ lp->card_name = "ISA COM20020";
+ if ((err = com20020_found(dev, 0)) != 0)
+ goto out;
+
+ return 0;
+
+out:
+ release_region(ioaddr, ARCNET_TOTAL_SIZE);
+ return err;
+}
+
+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[9]; /* use eg. device="arc1" to change name */
+static int timeout = 3;
+static int backplane = 0;
+static int clockp = 0;
+static int clockm = 0;
+
+module_param(node, int, 0);
+module_param(io, int, 0);
+module_param(irq, int, 0);
+module_param_string(device, device, sizeof(device), 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 struct net_device *my_dev;
+
+static int __init com20020_init(void)
+{
+ struct net_device *dev;
+ struct arcnet_local *lp;
+
+ dev = alloc_arcdev(device);
+ if (!dev)
+ return -ENOMEM;
+
+ if (node && node != 0xff)
+ dev->dev_addr[0] = node;
+
+ dev->netdev_ops = &com20020_netdev_ops;
+
+ lp = netdev_priv(dev);
+ lp->backplane = backplane;
+ lp->clockp = clockp & 7;
+ lp->clockm = clockm & 3;
+ lp->timeout = timeout & 3;
+ lp->hw.owner = THIS_MODULE;
+
+ dev->base_addr = io;
+ dev->irq = irq;
+
+ if (dev->irq == 2)
+ dev->irq = 9;
+
+ if (com20020isa_probe(dev)) {
+ free_netdev(dev);
+ return -EIO;
+ }
+
+ my_dev = dev;
+ return 0;
+}
+
+static void __exit com20020_exit(void)
+{
+ unregister_netdev(my_dev);
+ free_irq(my_dev->irq, my_dev);
+ release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
+ free_netdev(my_dev);
+}
+
+#ifndef MODULE
+static int __init com20020isa_setup(char *s)
+{
+ int ints[8];
+
+ s = get_options(s, 8, ints);
+ if (!ints[0])
+ return 1;
+
+ switch (ints[0]) {
+ default: /* ERROR */
+ printk("com90xx: Too many arguments.\n");
+ case 6: /* Timeout */
+ timeout = ints[6];
+ case 5: /* CKP value */
+ clockp = ints[5];
+ case 4: /* Backplane flag */
+ backplane = ints[4];
+ case 3: /* Node ID */
+ node = ints[3];
+ case 2: /* IRQ */
+ irq = ints[2];
+ case 1: /* IO address */
+ io = ints[1];
+ }
+ if (*s)
+ snprintf(device, sizeof(device), "%s", s);
+ return 1;
+}
+
+__setup("com20020=", com20020isa_setup);
+
+#endif /* MODULE */
+
+module_init(com20020_init)
+module_exit(com20020_exit)
Code Review / kvmfornfv.git / blobdiff