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![Jakub Kicinski](/assets/img/avatar_default.png)
Make the drivers which use single-byte netdev addresses (netdev->addr_len == 1) use the appropriate address setting helpers. arcnet copies from int variables and io reads a lot, so add a helper for arcnet drivers to use. Similar helper could be reused for phonet and appletalk but there isn't any good central location where we could put it, and netdevice.h is already very crowded. Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for HSI Link: https://lore.kernel.org/r/20211012142757.4124842-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
229 lines
5.5 KiB
C
229 lines
5.5 KiB
C
/*
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* Linux ARCnet driver - COM20020 chipset support
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*
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* Written 1997 by David Woodhouse.
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* Written 1994-1999 by Avery Pennarun.
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* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
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* Derived from skeleton.c by Donald Becker.
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*
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* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
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* for sponsoring the further development of this driver.
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*
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* **********************
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*
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* The original copyright of skeleton.c was as follows:
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*
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* skeleton.c Written 1993 by Donald Becker.
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* Copyright 1993 United States Government as represented by the
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* Director, National Security Agency. This software may only be used
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* and distributed according to the terms of the GNU General Public License as
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* modified by SRC, incorporated herein by reference.
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*
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* **********************
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*
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* For more details, see drivers/net/arcnet.c
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*
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* **********************
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*/
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#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/memblock.h>
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#include <linux/io.h>
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#include "arcdevice.h"
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#include "com20020.h"
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/* We cannot (yet) probe for an IO mapped card, although we can check that
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* it's where we were told it was, and even do autoirq.
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*/
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static int __init com20020isa_probe(struct net_device *dev)
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{
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int ioaddr;
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unsigned long airqmask;
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struct arcnet_local *lp = netdev_priv(dev);
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int err;
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if (BUGLVL(D_NORMAL))
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pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)");
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ioaddr = dev->base_addr;
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if (!ioaddr) {
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arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");
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return -ENODEV;
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}
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if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
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arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n",
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ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
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return -ENXIO;
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}
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if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
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arc_printk(D_NORMAL, dev, "IO address %x empty\n", ioaddr);
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err = -ENODEV;
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goto out;
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}
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if (com20020_check(dev)) {
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err = -ENODEV;
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goto out;
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}
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if (!dev->irq) {
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/* if we do this, we're sure to get an IRQ since the
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* card has just reset and the NORXflag is on until
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* we tell it to start receiving.
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*/
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arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n",
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arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
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arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
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airqmask = probe_irq_on();
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arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
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udelay(1);
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arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
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dev->irq = probe_irq_off(airqmask);
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if ((int)dev->irq <= 0) {
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arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n");
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airqmask = probe_irq_on();
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arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
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udelay(5);
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arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
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dev->irq = probe_irq_off(airqmask);
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if ((int)dev->irq <= 0) {
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arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n");
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err = -ENODEV;
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goto out;
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}
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}
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}
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lp->card_name = "ISA COM20020";
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err = com20020_found(dev, 0);
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if (err != 0)
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goto out;
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return 0;
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out:
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release_region(ioaddr, ARCNET_TOTAL_SIZE);
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return err;
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}
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static int node = 0;
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static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
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static int irq = 0; /* or use the insmod io= irq= shmem= options */
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static char device[9]; /* use eg. device="arc1" to change name */
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static int timeout = 3;
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static int backplane = 0;
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static int clockp = 0;
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static int clockm = 0;
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module_param(node, int, 0);
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module_param_hw(io, int, ioport, 0);
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module_param_hw(irq, int, irq, 0);
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module_param_string(device, device, sizeof(device), 0);
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module_param(timeout, int, 0);
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module_param(backplane, int, 0);
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module_param(clockp, int, 0);
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module_param(clockm, int, 0);
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MODULE_LICENSE("GPL");
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static struct net_device *my_dev;
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static int __init com20020_init(void)
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{
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struct net_device *dev;
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struct arcnet_local *lp;
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dev = alloc_arcdev(device);
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if (!dev)
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return -ENOMEM;
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if (node && node != 0xff)
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arcnet_set_addr(dev, node);
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dev->netdev_ops = &com20020_netdev_ops;
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lp = netdev_priv(dev);
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lp->backplane = backplane;
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lp->clockp = clockp & 7;
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lp->clockm = clockm & 3;
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lp->timeout = timeout & 3;
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lp->hw.owner = THIS_MODULE;
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dev->base_addr = io;
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dev->irq = irq;
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if (dev->irq == 2)
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dev->irq = 9;
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if (com20020isa_probe(dev)) {
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free_arcdev(dev);
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return -EIO;
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}
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my_dev = dev;
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return 0;
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}
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static void __exit com20020_exit(void)
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{
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unregister_netdev(my_dev);
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free_irq(my_dev->irq, my_dev);
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release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
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free_arcdev(my_dev);
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}
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#ifndef MODULE
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static int __init com20020isa_setup(char *s)
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{
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int ints[8];
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s = get_options(s, 8, ints);
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if (!ints[0])
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return 1;
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switch (ints[0]) {
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default: /* ERROR */
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pr_info("Too many arguments\n");
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fallthrough;
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case 6: /* Timeout */
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timeout = ints[6];
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fallthrough;
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case 5: /* CKP value */
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clockp = ints[5];
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fallthrough;
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case 4: /* Backplane flag */
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backplane = ints[4];
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fallthrough;
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case 3: /* Node ID */
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node = ints[3];
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fallthrough;
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case 2: /* IRQ */
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irq = ints[2];
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fallthrough;
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case 1: /* IO address */
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io = ints[1];
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}
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if (*s)
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snprintf(device, sizeof(device), "%s", s);
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return 1;
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}
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__setup("com20020=", com20020isa_setup);
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#endif /* MODULE */
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module_init(com20020_init)
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module_exit(com20020_exit)
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