b1pcmcia.c

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/* $Id: b1pcmcia.c,v 1.1.2.2 2004/01/16 21:09:27 keil Exp $
 *
 * Module for AVM B1/M1/M2 PCMCIA-card.
 *
 * Copyright 1999 by Carsten Paeth <[email protected]>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/capi.h>
#include <linux/b1pcmcia.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capilli.h>
#include "avmcard.h"

/* ------------------------------------------------------------- */

static char *revision = "$Revision: 1.1.2.2 $";

/* ------------------------------------------------------------- */

MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM PCMCIA cards");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");

/* ------------------------------------------------------------- */

static void b1pcmcia_remove_ctr(struct capi_ctr *ctrl)
{
    avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
    avmcard *card = cinfo->card;
    unsigned int port = card->port;

    b1_reset(port);
    b1_reset(port);

    detach_capi_ctr(ctrl);
    free_irq(card->irq, card);
    b1_free_card(card);
}

/* ------------------------------------------------------------- */

static LIST_HEAD(cards);

static char *b1pcmcia_procinfo(struct capi_ctr *ctrl);

static int b1pcmcia_add_card(unsigned int port, unsigned irq,
                 enum avmcardtype cardtype)
{
    avmctrl_info *cinfo;
    avmcard *card;
    char *cardname;
    int retval;

    card = b1_alloc_card(1);
    if (!card) {
        printk(KERN_WARNING "b1pcmcia: no memory.\n");
        retval = -ENOMEM;
        goto err;
    }
    cinfo = card->ctrlinfo;

    switch (cardtype) {
    case avm_m1: sprintf(card->name, "m1-%x", port); break;
    case avm_m2: sprintf(card->name, "m2-%x", port); break;
    default: sprintf(card->name, "b1pcmcia-%x", port); break;
    }
    card->port = port;
    card->irq = irq;
    card->cardtype = cardtype;

    retval = request_irq(card->irq, b1_interrupt, IRQF_SHARED, card->name, card);
    if (retval) {
        printk(KERN_ERR "b1pcmcia: unable to get IRQ %d.\n",
               card->irq);
        retval = -EBUSY;
        goto err_free;
    }
    b1_reset(card->port);
    if ((retval = b1_detect(card->port, card->cardtype)) != 0) {
        printk(KERN_NOTICE "b1pcmcia: NO card at 0x%x (%d)\n",
               card->port, retval);
        retval = -ENODEV;
        goto err_free_irq;
    }
    b1_reset(card->port);
    b1_getrevision(card);

    cinfo->capi_ctrl.owner         = THIS_MODULE;
    cinfo->capi_ctrl.driver_name   = "b1pcmcia";
    cinfo->capi_ctrl.driverdata    = cinfo;
    cinfo->capi_ctrl.register_appl = b1_register_appl;
    cinfo->capi_ctrl.release_appl  = b1_release_appl;
    cinfo->capi_ctrl.send_message  = b1_send_message;
    cinfo->capi_ctrl.load_firmware = b1_load_firmware;
    cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
    cinfo->capi_ctrl.procinfo      = b1pcmcia_procinfo;
    cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
    strcpy(cinfo->capi_ctrl.name, card->name);

    retval = attach_capi_ctr(&cinfo->capi_ctrl);
    if (retval) {
        printk(KERN_ERR "b1pcmcia: attach controller failed.\n");
        goto err_free_irq;
    }
    switch (cardtype) {
    case avm_m1: cardname = "M1"; break;
    case avm_m2: cardname = "M2"; break;
    default: cardname = "B1 PCMCIA"; break;
    }

    printk(KERN_INFO "b1pcmcia: AVM %s at i/o %#x, irq %d, revision %d\n",
           cardname, card->port, card->irq, card->revision);

    list_add(&card->list, &cards);
    return cinfo->capi_ctrl.cnr;

err_free_irq:
    free_irq(card->irq, card);
err_free:
    b1_free_card(card);
err:
    return retval;
}

/* ------------------------------------------------------------- */

static char *b1pcmcia_procinfo(struct capi_ctr *ctrl)
{
    avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);

    if (!cinfo)
        return "";
    sprintf(cinfo->infobuf, "%s %s 0x%x %d r%d",
        cinfo->cardname[0] ? cinfo->cardname : "-",
        cinfo->version[VER_DRIVER] ? cinfo->version[VER_DRIVER] : "-",
        cinfo->card ? cinfo->card->port : 0x0,
        cinfo->card ? cinfo->card->irq : 0,
        cinfo->card ? cinfo->card->revision : 0
        );
    return cinfo->infobuf;
}

/* ------------------------------------------------------------- */

int b1pcmcia_addcard_b1(unsigned int port, unsigned irq)
{
    return b1pcmcia_add_card(port, irq, avm_b1pcmcia);
}

int b1pcmcia_addcard_m1(unsigned int port, unsigned irq)
{
    return b1pcmcia_add_card(port, irq, avm_m1);
}

int b1pcmcia_addcard_m2(unsigned int port, unsigned irq)
{
    return b1pcmcia_add_card(port, irq, avm_m2);
}

int b1pcmcia_delcard(unsigned int port, unsigned irq)
{
    struct list_head *l;
    avmcard *card;

    list_for_each(l, &cards) {
        card = list_entry(l, avmcard, list);
        if (card->port == port && card->irq == irq) {
            b1pcmcia_remove_ctr(&card->ctrlinfo[0].capi_ctrl);
            return 0;
        }
    }
    return -ESRCH;
}

EXPORT_SYMBOL(b1pcmcia_addcard_b1);
EXPORT_SYMBOL(b1pcmcia_addcard_m1);
EXPORT_SYMBOL(b1pcmcia_addcard_m2);
EXPORT_SYMBOL(b1pcmcia_delcard);

static struct capi_driver capi_driver_b1pcmcia = {
    .name       = "b1pcmcia",
    .revision   = "1.0",
};

static int __init b1pcmcia_init(void)
{
    char *p;
    char rev[32];

    if ((p = strchr(revision, ':')) != NULL && p[1]) {
        strlcpy(rev, p + 2, 32);
        if ((p = strchr(rev, '$')) != NULL && p > rev)
            *(p - 1) = 0;
    } else
        strcpy(rev, "1.0");

    strlcpy(capi_driver_b1pcmcia.revision, rev, 32);
    register_capi_driver(&capi_driver_b1pcmcia);
    printk(KERN_INFO "b1pci: revision %s\n", rev);

    return 0;
}

static void __exit b1pcmcia_exit(void)
{
    unregister_capi_driver(&capi_driver_b1pcmcia);
}

module_init(b1pcmcia_init);
module_exit(b1pcmcia_exit);