linux-imx

/*

 * Kernel CAPI 2.0 Module - /proc/capi handling

 *

 * Copyright 1999 by Carsten Paeth <calle@calle.de>

 * Copyright 2002 by Kai Germaschewski <kai@germaschewski.name>

 *

 * This software may be used and distributed according to the terms

 * of the GNU General Public License, incorporated herein by reference.

 *

 */

​

​

#include "kcapi.h"

#include <linux/proc_fs.h>

#include <linux/seq_file.h>

#include <linux/init.h>

#include <linux/export.h>

​

static char *state2str(unsigned short state)

{

    switch (state) {

    case CAPI_CTR_DETECTED: return "detected";

    case CAPI_CTR_LOADING:  return "loading";

    case CAPI_CTR_RUNNING:  return "running";

    default:            return "???";

    }

}

​

// /proc/capi

// ===========================================================================

​

// /proc/capi/controller:

//      cnr driver cardstate name driverinfo

// /proc/capi/contrstats:

//      cnr nrecvctlpkt nrecvdatapkt nsentctlpkt nsentdatapkt

// ---------------------------------------------------------------------------

​

static void *controller_start(struct seq_file *seq, loff_t *pos)

    __acquires(capi_controller_lock)

{

    mutex_lock(&capi_controller_lock);

​

    if (*pos < CAPI_MAXCONTR)

        return &capi_controller[*pos];

​

    return NULL;

}

​

static void *controller_next(struct seq_file *seq, void *v, loff_t *pos)

{

    ++*pos;

    if (*pos < CAPI_MAXCONTR)

        return &capi_controller[*pos];

​

    return NULL;

}

​

static void controller_stop(struct seq_file *seq, void *v)

    __releases(capi_controller_lock)

{

    mutex_unlock(&capi_controller_lock);

}

​

static int controller_show(struct seq_file *seq, void *v)

{

    struct capi_ctr *ctr = *(struct capi_ctr **) v;

​

    if (!ctr)

        return 0;

​

    seq_printf(seq, "%d %-10s %-8s %-16s %s\n",

           ctr->cnr, ctr->driver_name,

           state2str(ctr->state),

           ctr->name,

           ctr->procinfo ?  ctr->procinfo(ctr) : "");

​

    return 0;

}

​

static int contrstats_show(struct seq_file *seq, void *v)

{

    struct capi_ctr *ctr = *(struct capi_ctr **) v;

​

    if (!ctr)

        return 0;

​

    seq_printf(seq, "%d %lu %lu %lu %lu\n",

           ctr->cnr,

           ctr->nrecvctlpkt,

           ctr->nrecvdatapkt,

           ctr->nsentctlpkt,

           ctr->nsentdatapkt);