linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 *  Procfs interface for the Zorro bus.

 *

 *  Copyright (C) 1998-2003 Geert Uytterhoeven

 *

 *  Heavily based on the procfs interface for the PCI bus, which is

 *

 *  Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>

 */

​

#include <linux/types.h>

#include <linux/zorro.h>

#include <linux/proc_fs.h>

#include <linux/seq_file.h>

#include <linux/init.h>

#include <linux/export.h>

​

#include <asm/byteorder.h>

#include <linux/uaccess.h>

#include <asm/amigahw.h>

#include <asm/setup.h>

​

static loff_t

proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)

{

    return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));

}

​

static ssize_t

proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)

{

    struct zorro_dev *z = PDE_DATA(file_inode(file));

    struct ConfigDev cd;

    loff_t pos = *ppos;

​

    if (pos >= sizeof(struct ConfigDev))

        return 0;

    if (nbytes >= sizeof(struct ConfigDev))

        nbytes = sizeof(struct ConfigDev);

    if (pos + nbytes > sizeof(struct ConfigDev))

        nbytes = sizeof(struct ConfigDev) - pos;

​

    /* Construct a ConfigDev */

    memset(&cd, 0, sizeof(cd));

    cd.cd_Rom = z->rom;

    cd.cd_SlotAddr = cpu_to_be16(z->slotaddr);

    cd.cd_SlotSize = cpu_to_be16(z->slotsize);

    cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));

    cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));

​

    if (copy_to_user(buf, (void *)&cd + pos, nbytes))

        return -EFAULT;

    *ppos += nbytes;

​

    return nbytes;

}

​

static const struct file_operations proc_bus_zorro_operations = {

    .owner      = THIS_MODULE,

    .llseek     = proc_bus_zorro_lseek,

    .read       = proc_bus_zorro_read,

};