patch-2.3.36 linux/drivers/net/arcnet/com20020-isa.c

• Lines: 235
• Date: Sun Jan 2 00:46:32 2000
• Orig file: v2.3.35/linux/drivers/net/arcnet/com20020-isa.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.35/linux/drivers/net/arcnet/com20020-isa.c linux/drivers/net/arcnet/com20020-isa.c
@@ -0,0 +1,234 @@
+/*
+ * Linux ARCnet driver - COM20020 chipset support
+ * 
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999 by Martin Mares <[email protected]>.
+ * 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 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/malloc.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;
+
+#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 empty\n", 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 %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 (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 (dev->irq <= 0) {
+				BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
+				return -ENODEV;
+			}
+		}
+	}
+	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 clock = 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(clock, "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->clock = clock & 7;
+	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)
+{
+	struct net_device *dev = my_dev;
+
+	if (dev->start)
+		dev->stop(dev);
+
+	free_irq(dev->irq, dev);
+	release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
+	unregister_netdev(dev);
+	kfree(dev->priv);
+	kfree(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) + 10);
+	memset(dev, 0, sizeof(struct net_device) + sizeof(struct arcnet_local) + 10);
+	lp = dev->priv = (struct arcnet_local *) (dev + 1);
+	dev->name = (char *) (lp + 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->clock = 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 device\n");
+
+	return 1;
+}
+
+__setup("com20020=", com20020isa_setup);
+
+#endif				/* MODULE */