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1/*2 * Linux ARCnet driver - COM20020 chipset support3 *4 * Written 1997 by David Woodhouse.5 * Written 1994-1999 by Avery Pennarun.6 * Written 1999-2000 by Martin Mares <mj@ucw.cz>.7 * Derived from skeleton.c by Donald Becker.8 *9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)10 * for sponsoring the further development of this driver.11 *12 * **********************13 *14 * The original copyright of skeleton.c was as follows:15 *16 * skeleton.c Written 1993 by Donald Becker.17 * Copyright 1993 United States Government as represented by the18 * Director, National Security Agency. This software may only be used19 * and distributed according to the terms of the GNU General Public License as20 * modified by SRC, incorporated herein by reference.21 *22 * **********************23 *24 * For more details, see drivers/net/arcnet.c25 *26 * **********************27 */28 29#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt30 31#include <linux/module.h>32#include <linux/moduleparam.h>33#include <linux/kernel.h>34#include <linux/types.h>35#include <linux/ioport.h>36#include <linux/errno.h>37#include <linux/delay.h>38#include <linux/netdevice.h>39#include <linux/init.h>40#include <linux/interrupt.h>41#include <linux/memblock.h>42#include <linux/io.h>43 44#include "arcdevice.h"45#include "com20020.h"46 47/* We cannot (yet) probe for an IO mapped card, although we can check that48 * it's where we were told it was, and even do autoirq.49 */50static int __init com20020isa_probe(struct net_device *dev)51{52 int ioaddr;53 unsigned long airqmask;54 struct arcnet_local *lp = netdev_priv(dev);55 int err;56 57 if (BUGLVL(D_NORMAL))58 pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)");59 60 ioaddr = dev->base_addr;61 if (!ioaddr) {62 arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");63 return -ENODEV;64 }65 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {66 arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n",67 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);68 return -ENXIO;69 }70 if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {71 arc_printk(D_NORMAL, dev, "IO address %x empty\n", ioaddr);72 err = -ENODEV;73 goto out;74 }75 if (com20020_check(dev)) {76 err = -ENODEV;77 goto out;78 }79 80 if (!dev->irq) {81 /* if we do this, we're sure to get an IRQ since the82 * card has just reset and the NORXflag is on until83 * we tell it to start receiving.84 */85 arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n",86 arcnet_inb(ioaddr, COM20020_REG_R_STATUS));87 arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);88 airqmask = probe_irq_on();89 arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);90 udelay(1);91 arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);92 dev->irq = probe_irq_off(airqmask);93 94 if ((int)dev->irq <= 0) {95 arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n");96 airqmask = probe_irq_on();97 arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);98 udelay(5);99 arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);100 dev->irq = probe_irq_off(airqmask);101 if ((int)dev->irq <= 0) {102 arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n");103 err = -ENODEV;104 goto out;105 }106 }107 }108 109 lp->card_name = "ISA COM20020";110 111 err = com20020_found(dev, 0);112 if (err != 0)113 goto out;114 115 return 0;116 117out:118 release_region(ioaddr, ARCNET_TOTAL_SIZE);119 return err;120}121 122static int node = 0;123static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */124static int irq = 0; /* or use the insmod io= irq= shmem= options */125static char device[9]; /* use eg. device="arc1" to change name */126static int timeout = 3;127static int backplane = 0;128static int clockp = 0;129static int clockm = 0;130 131module_param(node, int, 0);132module_param_hw(io, int, ioport, 0);133module_param_hw(irq, int, irq, 0);134module_param_string(device, device, sizeof(device), 0);135module_param(timeout, int, 0);136module_param(backplane, int, 0);137module_param(clockp, int, 0);138module_param(clockm, int, 0);139 140MODULE_DESCRIPTION("ARCnet COM20020 chipset ISA driver");141MODULE_LICENSE("GPL");142 143static struct net_device *my_dev;144 145static int __init com20020_init(void)146{147 struct net_device *dev;148 struct arcnet_local *lp;149 150 dev = alloc_arcdev(device);151 if (!dev)152 return -ENOMEM;153 154 if (node && node != 0xff)155 arcnet_set_addr(dev, node);156 157 dev->netdev_ops = &com20020_netdev_ops;158 159 lp = netdev_priv(dev);160 lp->backplane = backplane;161 lp->clockp = clockp & 7;162 lp->clockm = clockm & 3;163 lp->timeout = timeout & 3;164 lp->hw.owner = THIS_MODULE;165 166 dev->base_addr = io;167 dev->irq = irq;168 169 if (dev->irq == 2)170 dev->irq = 9;171 172 if (com20020isa_probe(dev)) {173 free_arcdev(dev);174 return -EIO;175 }176 177 my_dev = dev;178 return 0;179}180 181static void __exit com20020_exit(void)182{183 unregister_netdev(my_dev);184 free_irq(my_dev->irq, my_dev);185 release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);186 free_arcdev(my_dev);187}188 189#ifndef MODULE190static int __init com20020isa_setup(char *s)191{192 int ints[8];193 194 s = get_options(s, 8, ints);195 if (!ints[0])196 return 1;197 198 switch (ints[0]) {199 default: /* ERROR */200 pr_info("Too many arguments\n");201 fallthrough;202 case 6: /* Timeout */203 timeout = ints[6];204 fallthrough;205 case 5: /* CKP value */206 clockp = ints[5];207 fallthrough;208 case 4: /* Backplane flag */209 backplane = ints[4];210 fallthrough;211 case 3: /* Node ID */212 node = ints[3];213 fallthrough;214 case 2: /* IRQ */215 irq = ints[2];216 fallthrough;217 case 1: /* IO address */218 io = ints[1];219 }220 if (*s)221 snprintf(device, sizeof(device), "%s", s);222 return 1;223}224 225__setup("com20020=", com20020isa_setup);226 227#endif /* MODULE */228 229module_init(com20020_init)230module_exit(com20020_exit)231