/*
 * Linux ARCnet driver - COM20020 PCMCIA support
 *
 * Written 1994-1999 by Avery Pennarun,
 *    based on an ISA version by David Woodhouse.
 * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
 *    which was derived from pcnet_cs.c by David Hinds.
 * Some additional portions 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.
 *
 * **********************
 * Changes:
 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
 * - reorganize kmallocs in com20020_attach, checking all for failure
 *   and releasing the previous allocations if one fails
 * **********************
 *
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */

#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/io.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>

#include "arcdevice.h"
#include "com20020.h"

static void regdump(struct net_device *dev)
{
#ifdef DEBUG
        int ioaddr = dev->base_addr;
        int count;

        netdev_dbg(dev, "register dump:\n");
        for (count = 0; count < 16; count++) {
                if (!(count % 16))
                        pr_cont("%04X:", ioaddr + count);
                pr_cont(" %02X", arcnet_inb(ioaddr, count));
        }
        pr_cont("\n");

        netdev_dbg(dev, "buffer0 dump:\n");
        /* set up the address register */
        count = 0;
        arcnet_outb((count >> 8) | RDDATAflag | AUTOINCflag,
                    ioaddr, com20020_REG_W_ADDR_HI);
        arcnet_outb(count & 0xff, ioaddr, COM20020_REG_W_ADDR_LO);

        for (count = 0; count < 256 + 32; count++) {
                if (!(count % 16))
                        pr_cont("%04X:", count);

                /* copy the data */
                pr_cont(" %02X", arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA));
        }
        pr_cont("\n");
#endif
}

/*====================================================================*/

/* Parameters that can be set with 'insmod' */

static int node;
static int timeout = 3;
static int backplane;
static int clockp;
static int clockm;

module_param(node, int, 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 int com20020_config(struct pcmcia_device *link);
static void com20020_release(struct pcmcia_device *link);

static void com20020_detach(struct pcmcia_device *p_dev);

/*====================================================================*/

static int com20020_probe(struct pcmcia_device *p_dev)
{
        struct com20020_dev *info;
        struct net_device *dev;
        struct arcnet_local *lp;

        dev_dbg(&p_dev->dev, "com20020_attach()\n");

        /* Create new network device */
        info = kzalloc(sizeof(*info), GFP_KERNEL);
        if (!info)
                goto fail_alloc_info;

        dev = alloc_arcdev("");
        if (!dev)
                goto fail_alloc_dev;

        lp = netdev_priv(dev);
        lp->timeout = timeout;
        lp->backplane = backplane;
        lp->clockp = clockp;
        lp->clockm = clockm & 3;
        lp->hw.owner = THIS_MODULE;

        /* fill in our module parameters as defaults */
        dev->dev_addr[0] = node;

        p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
        p_dev->resource[0]->end = 16;
        p_dev->config_flags |= CONF_ENABLE_IRQ;

        info->dev = dev;
        p_dev->priv = info;

        return com20020_config(p_dev);

fail_alloc_dev:
        kfree(info);
fail_alloc_info:
        return -ENOMEM;
} /* com20020_attach */

static void com20020_detach(struct pcmcia_device *link)
{
        struct com20020_dev *info = link->priv;
        struct net_device *dev = info->dev;

        dev_dbg(&link->dev, "detach...\n");

        dev_dbg(&link->dev, "com20020_detach\n");

        dev_dbg(&link->dev, "unregister...\n");

        unregister_netdev(dev);

        /* this is necessary because we register our IRQ separately
         * from card services.
         */
        if (dev->irq)
                free_irq(dev->irq, dev);

        com20020_release(link);

        /* Unlink device structure, free bits */
        dev_dbg(&link->dev, "unlinking...\n");
        if (link->priv) {
                dev = info->dev;
                if (dev) {
                        dev_dbg(&link->dev, "kfree...\n");
                        free_netdev(dev);
                }
                dev_dbg(&link->dev, "kfree2...\n");
                kfree(info);
        }

} /* com20020_detach */

static int com20020_config(struct pcmcia_device *link)
{
        struct arcnet_local *lp;
        struct com20020_dev *info;
        struct net_device *dev;
        int i, ret;
        int ioaddr;

        info = link->priv;
        dev = info->dev;

        dev_dbg(&link->dev, "config...\n");

        dev_dbg(&link->dev, "com20020_config\n");

        dev_dbg(&link->dev, "baseport1 is %Xh\n",
                (unsigned int)link->resource[0]->start);

        i = -ENODEV;
        link->io_lines = 16;

        if (!link->resource[0]->start) {
                for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10) {
                        link->resource[0]->start = ioaddr;
                        i = pcmcia_request_io(link);
                        if (i == 0)
                                break;
                }
        } else {
                i = pcmcia_request_io(link);
        }

        if (i != 0) {
                dev_dbg(&link->dev, "requestIO failed totally!\n");
                goto failed;
        }

        ioaddr = dev->base_addr = link->resource[0]->start;
        dev_dbg(&link->dev, "got ioaddr %Xh\n", ioaddr);

        dev_dbg(&link->dev, "request IRQ %d\n",
                link->irq);
        if (!link->irq) {
                dev_dbg(&link->dev, "requestIRQ failed totally!\n");
                goto failed;
        }

        dev->irq = link->irq;

        ret = pcmcia_enable_device(link);
        if (ret)
                goto failed;

        if (com20020_check(dev)) {
                regdump(dev);
                goto failed;
        }

        lp = netdev_priv(dev);
        lp->card_name = "PCMCIA COM20020";
        lp->card_flags = ARC_CAN_10MBIT; /* pretend all of them can 10Mbit */

        SET_NETDEV_DEV(dev, &link->dev);

        i = com20020_found(dev, 0);     /* calls register_netdev */

        if (i != 0) {
                dev_notice(&link->dev,
                           "com20020_found() failed\n");
                goto failed;
        }

        netdev_dbg(dev, "port %#3lx, irq %d\n",
                   dev->base_addr, dev->irq);
        return 0;

failed:
        dev_dbg(&link->dev, "com20020_config failed...\n");
        com20020_release(link);
        return -ENODEV;
} /* com20020_config */

static void com20020_release(struct pcmcia_device *link)
{
        dev_dbg(&link->dev, "com20020_release\n");
        pcmcia_disable_device(link);
}

static int com20020_suspend(struct pcmcia_device *link)
{
        struct com20020_dev *info = link->priv;
        struct net_device *dev = info->dev;

        if (link->open)
                netif_device_detach(dev);

        return 0;
}

static int com20020_resume(struct pcmcia_device *link)
{
        struct com20020_dev *info = link->priv;
        struct net_device *dev = info->dev;

        if (link->open) {
                int ioaddr = dev->base_addr;
                struct arcnet_local *lp = netdev_priv(dev);

                arcnet_outb(lp->config | 0x80, ioaddr, COM20020_REG_W_CONFIG);
                udelay(5);
                arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG);
        }

        return 0;
}

static const struct pcmcia_device_id com20020_ids[] = {
        PCMCIA_DEVICE_PROD_ID12("Contemporary Control Systems, Inc.",
                                "PCM20 Arcnet Adapter", 0x59991666, 0x95dfffaf),
        PCMCIA_DEVICE_PROD_ID12("SoHard AG",
                                "SH ARC PCMCIA", 0xf8991729, 0x69dff0c7),
        PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, com20020_ids);

static struct pcmcia_driver com20020_cs_driver = {
        .owner          = THIS_MODULE,
        .name           = "com20020_cs",
        .probe          = com20020_probe,
        .remove         = com20020_detach,
        .id_table       = com20020_ids,
        .suspend        = com20020_suspend,
        .resume         = com20020_resume,
};
module_pcmcia_driver(com20020_cs_driver);