LXR linux/drivers/zorro/proc.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *      Procfs interface for the Zorro bus.
   4 *
   5 *      Copyright (C) 1998-2003 Geert Uytterhoeven
   6 *
   7 *      Heavily based on the procfs interface for the PCI bus, which is
   8 *
   9 *      Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
  10 */
  11
  12#include <linux/types.h>
  13#include <linux/zorro.h>
  14#include <linux/proc_fs.h>
  15#include <linux/seq_file.h>
  16#include <linux/init.h>
  17#include <linux/export.h>
  18
  19#include <asm/byteorder.h>
  20#include <linux/uaccess.h>
  21#include <asm/amigahw.h>
  22#include <asm/setup.h>
  23
  24static loff_t
  25proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
  26{
  27        return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));
  28}
  29
  30static ssize_t
  31proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  32{
  33        struct zorro_dev *z = PDE_DATA(file_inode(file));
  34        struct ConfigDev cd;
  35        loff_t pos = *ppos;
  36
  37        if (pos >= sizeof(struct ConfigDev))
  38                return 0;
  39        if (nbytes >= sizeof(struct ConfigDev))
  40                nbytes = sizeof(struct ConfigDev);
  41        if (pos + nbytes > sizeof(struct ConfigDev))
  42                nbytes = sizeof(struct ConfigDev) - pos;
  43
  44        /* Construct a ConfigDev */
  45        memset(&cd, 0, sizeof(cd));
  46        cd.cd_Rom = z->rom;
  47        cd.cd_SlotAddr = cpu_to_be16(z->slotaddr);
  48        cd.cd_SlotSize = cpu_to_be16(z->slotsize);
  49        cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));
  50        cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));
  51
  52        if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  53                return -EFAULT;
  54        *ppos += nbytes;
  55
  56        return nbytes;
  57}
  58
  59static const struct proc_ops bus_zorro_proc_ops = {
  60        .proc_lseek     = proc_bus_zorro_lseek,
  61        .proc_read      = proc_bus_zorro_read,
  62};
  63
  64static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  65{
  66        return (*pos < zorro_num_autocon) ? pos : NULL;
  67}
  68
  69static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  70{
  71        (*pos)++;
  72        return (*pos < zorro_num_autocon) ? pos : NULL;
  73}
  74
  75static void zorro_seq_stop(struct seq_file *m, void *v)
  76{
  77}
  78
  79static int zorro_seq_show(struct seq_file *m, void *v)
  80{
  81        unsigned int slot = *(loff_t *)v;
  82        struct zorro_dev *z = &zorro_autocon[slot];
  83
  84        seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
  85                   (unsigned long)zorro_resource_start(z),
  86                   (unsigned long)zorro_resource_len(z),
  87                   z->rom.er_Type);
  88        return 0;
  89}
  90
  91static const struct seq_operations zorro_devices_seq_ops = {
  92        .start = zorro_seq_start,
  93        .next  = zorro_seq_next,
  94        .stop  = zorro_seq_stop,
  95        .show  = zorro_seq_show,
  96};
  97
  98static struct proc_dir_entry *proc_bus_zorro_dir;
  99
 100static int __init zorro_proc_attach_device(unsigned int slot)
 101{
 102        struct proc_dir_entry *entry;
 103        char name[4];
 104
 105        sprintf(name, "%02x", slot);
 106        entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 107                                 &bus_zorro_proc_ops,
 108                                 &zorro_autocon[slot]);
 109        if (!entry)
 110                return -ENOMEM;
 111        proc_set_size(entry, sizeof(struct zorro_dev));
 112        return 0;
 113}
 114
 115static int __init zorro_proc_init(void)
 116{
 117        unsigned int slot;
 118
 119        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 120                proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 121                proc_create_seq("devices", 0, proc_bus_zorro_dir,
 122                            &zorro_devices_seq_ops);
 123                for (slot = 0; slot < zorro_num_autocon; slot++)
 124                        zorro_proc_attach_device(slot);
 125        }
 126        return 0;
 127}
 128
 129device_initcall(zorro_proc_init);
 130