diff options
Diffstat (limited to 'drivers/net/arcnet/com20020-isa.c')
| -rw-r--r-- | drivers/net/arcnet/com20020-isa.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/drivers/net/arcnet/com20020-isa.c b/drivers/net/arcnet/com20020-isa.c new file mode 100644 index 0000000000..293a621e65 --- /dev/null +++ b/drivers/net/arcnet/com20020-isa.c @@ -0,0 +1,229 @@ +/* + * 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 + * + * ********************** + */ + +#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt + +#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/memblock.h> +#include <linux/io.h> + +#include "arcdevice.h" +#include "com20020.h" + +/* 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; + + if (BUGLVL(D_NORMAL)) + pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)"); + + ioaddr = dev->base_addr; + if (!ioaddr) { + arc_printk(D_NORMAL, dev, "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)")) { + arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n", + ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1); + return -ENXIO; + } + if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) { + arc_printk(D_NORMAL, dev, "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. + */ + arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n", + arcnet_inb(ioaddr, COM20020_REG_R_STATUS)); + arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK); + airqmask = probe_irq_on(); + arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK); + udelay(1); + arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK); + dev->irq = probe_irq_off(airqmask); + + if ((int)dev->irq <= 0) { + arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n"); + airqmask = probe_irq_on(); + arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK); + udelay(5); + arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK); + dev->irq = probe_irq_off(airqmask); + if ((int)dev->irq <= 0) { + arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n"); + err = -ENODEV; + goto out; + } + } + } + + lp->card_name = "ISA COM20020"; + + err = com20020_found(dev, 0); + if (err != 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_hw(io, int, ioport, 0); +module_param_hw(irq, int, irq, 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) + arcnet_set_addr(dev, 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_arcdev(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_arcdev(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 */ + pr_info("Too many arguments\n"); + fallthrough; + case 6: /* Timeout */ + timeout = ints[6]; + fallthrough; + case 5: /* CKP value */ + clockp = ints[5]; + fallthrough; + case 4: /* Backplane flag */ + backplane = ints[4]; + fallthrough; + case 3: /* Node ID */ + node = ints[3]; + fallthrough; + case 2: /* IRQ */ + irq = ints[2]; + fallthrough; + 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) |