Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux ARCnet driver - COM20020 chipset support |
| 3 | * |
| 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 the |
| 18 | * Director, National Security Agency. This software may only be used |
| 19 | * and distributed according to the terms of the GNU General Public License as |
| 20 | * modified by SRC, incorporated herein by reference. |
| 21 | * |
| 22 | * ********************** |
| 23 | * |
| 24 | * For more details, see drivers/net/arcnet.c |
| 25 | * |
| 26 | * ********************** |
| 27 | */ |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/moduleparam.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/errno.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/netdevice.h> |
| 36 | #include <linux/init.h> |
Alexey Dobriyan | a6b7a40 | 2011-06-06 10:43:46 +0000 | [diff] [blame] | 37 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/bootmem.h> |
| 39 | #include <linux/arcdevice.h> |
| 40 | #include <linux/com20020.h> |
| 41 | |
| 42 | #include <asm/io.h> |
| 43 | |
| 44 | #define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n" |
| 45 | |
| 46 | |
| 47 | /* |
| 48 | * We cannot (yet) probe for an IO mapped card, although we can check that |
| 49 | * it's where we were told it was, and even do autoirq. |
| 50 | */ |
| 51 | static int __init com20020isa_probe(struct net_device *dev) |
| 52 | { |
| 53 | int ioaddr; |
| 54 | unsigned long airqmask; |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 55 | struct arcnet_local *lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int err; |
| 57 | |
| 58 | BUGLVL(D_NORMAL) printk(VERSION); |
| 59 | |
| 60 | ioaddr = dev->base_addr; |
| 61 | if (!ioaddr) { |
| 62 | BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you " |
| 63 | "must specify the base address!\n"); |
| 64 | return -ENODEV; |
| 65 | } |
| 66 | if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) { |
| 67 | BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n", |
| 68 | ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1); |
| 69 | return -ENXIO; |
| 70 | } |
| 71 | if (ASTATUS() == 0xFF) { |
| 72 | BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr); |
| 73 | err = -ENODEV; |
| 74 | goto out; |
| 75 | } |
| 76 | if (com20020_check(dev)) { |
| 77 | err = -ENODEV; |
| 78 | goto out; |
| 79 | } |
| 80 | |
| 81 | if (!dev->irq) { |
| 82 | /* if we do this, we're sure to get an IRQ since the |
| 83 | * card has just reset and the NORXflag is on until |
| 84 | * we tell it to start receiving. |
| 85 | */ |
| 86 | BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK)); |
| 87 | outb(0, _INTMASK); |
| 88 | airqmask = probe_irq_on(); |
| 89 | outb(NORXflag, _INTMASK); |
| 90 | udelay(1); |
| 91 | outb(0, _INTMASK); |
| 92 | dev->irq = probe_irq_off(airqmask); |
| 93 | |
Dan Carpenter | 0a6efc7 | 2010-07-17 07:21:28 +0000 | [diff] [blame] | 94 | if ((int)dev->irq <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n"); |
| 96 | airqmask = probe_irq_on(); |
| 97 | outb(NORXflag, _INTMASK); |
| 98 | udelay(5); |
| 99 | outb(0, _INTMASK); |
| 100 | dev->irq = probe_irq_off(airqmask); |
Dan Carpenter | 0a6efc7 | 2010-07-17 07:21:28 +0000 | [diff] [blame] | 101 | if ((int)dev->irq <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n"); |
| 103 | err = -ENODEV; |
| 104 | goto out; |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | lp->card_name = "ISA COM20020"; |
| 110 | if ((err = com20020_found(dev, 0)) != 0) |
| 111 | goto out; |
| 112 | |
| 113 | return 0; |
| 114 | |
| 115 | out: |
| 116 | release_region(ioaddr, ARCNET_TOTAL_SIZE); |
| 117 | return err; |
| 118 | } |
| 119 | |
| 120 | static int node = 0; |
| 121 | static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */ |
| 122 | static int irq = 0; /* or use the insmod io= irq= shmem= options */ |
| 123 | static char device[9]; /* use eg. device="arc1" to change name */ |
| 124 | static int timeout = 3; |
| 125 | static int backplane = 0; |
| 126 | static int clockp = 0; |
| 127 | static int clockm = 0; |
| 128 | |
| 129 | module_param(node, int, 0); |
| 130 | module_param(io, int, 0); |
| 131 | module_param(irq, int, 0); |
| 132 | module_param_string(device, device, sizeof(device), 0); |
| 133 | module_param(timeout, int, 0); |
| 134 | module_param(backplane, int, 0); |
| 135 | module_param(clockp, int, 0); |
| 136 | module_param(clockm, int, 0); |
| 137 | |
| 138 | MODULE_LICENSE("GPL"); |
| 139 | |
| 140 | static struct net_device *my_dev; |
| 141 | |
| 142 | static int __init com20020_init(void) |
| 143 | { |
| 144 | struct net_device *dev; |
| 145 | struct arcnet_local *lp; |
| 146 | |
| 147 | dev = alloc_arcdev(device); |
| 148 | if (!dev) |
| 149 | return -ENOMEM; |
| 150 | |
| 151 | if (node && node != 0xff) |
| 152 | dev->dev_addr[0] = node; |
| 153 | |
Stephen Hemminger | a1799af | 2009-01-09 13:01:10 +0000 | [diff] [blame] | 154 | dev->netdev_ops = &com20020_netdev_ops; |
| 155 | |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 156 | lp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | lp->backplane = backplane; |
| 158 | lp->clockp = clockp & 7; |
| 159 | lp->clockm = clockm & 3; |
| 160 | lp->timeout = timeout & 3; |
| 161 | lp->hw.owner = THIS_MODULE; |
| 162 | |
| 163 | dev->base_addr = io; |
| 164 | dev->irq = irq; |
| 165 | |
| 166 | if (dev->irq == 2) |
| 167 | dev->irq = 9; |
| 168 | |
| 169 | if (com20020isa_probe(dev)) { |
| 170 | free_netdev(dev); |
| 171 | return -EIO; |
| 172 | } |
| 173 | |
| 174 | my_dev = dev; |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static void __exit com20020_exit(void) |
| 179 | { |
| 180 | unregister_netdev(my_dev); |
| 181 | free_irq(my_dev->irq, my_dev); |
| 182 | release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE); |
| 183 | free_netdev(my_dev); |
| 184 | } |
| 185 | |
| 186 | #ifndef MODULE |
| 187 | static int __init com20020isa_setup(char *s) |
| 188 | { |
| 189 | int ints[8]; |
| 190 | |
| 191 | s = get_options(s, 8, ints); |
| 192 | if (!ints[0]) |
| 193 | return 1; |
| 194 | |
| 195 | switch (ints[0]) { |
| 196 | default: /* ERROR */ |
| 197 | printk("com90xx: Too many arguments.\n"); |
| 198 | case 6: /* Timeout */ |
| 199 | timeout = ints[6]; |
| 200 | case 5: /* CKP value */ |
| 201 | clockp = ints[5]; |
| 202 | case 4: /* Backplane flag */ |
| 203 | backplane = ints[4]; |
| 204 | case 3: /* Node ID */ |
| 205 | node = ints[3]; |
| 206 | case 2: /* IRQ */ |
| 207 | irq = ints[2]; |
| 208 | case 1: /* IO address */ |
| 209 | io = ints[1]; |
| 210 | } |
| 211 | if (*s) |
| 212 | snprintf(device, sizeof(device), "%s", s); |
| 213 | return 1; |
| 214 | } |
| 215 | |
| 216 | __setup("com20020=", com20020isa_setup); |
| 217 | |
| 218 | #endif /* MODULE */ |
| 219 | |
| 220 | module_init(com20020_init) |
| 221 | module_exit(com20020_exit) |