LXR linux/drivers/zorro/proc.c

   1/*
   2 *      Procfs interface for the Zorro bus.
   3 *
   4 *      Copyright (C) 1998-2003 Geert Uytterhoeven
   5 *
   6 *      Heavily based on the procfs interface for the PCI bus, which is
   7 *
   8 *      Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
   9 */
  10
  11#include <linux/types.h>
  12#include <linux/zorro.h>
  13#include <linux/proc_fs.h>
  14#include <linux/seq_file.h>
  15#include <linux/init.h>
  16#include <linux/smp_lock.h>
  17#include <asm/uaccess.h>
  18#include <asm/amigahw.h>
  19#include <asm/setup.h>
  20
  21static loff_t
  22proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
  23{
  24        loff_t new = -1;
  25
  26        lock_kernel();
  27        switch (whence) {
  28        case 0:
  29                new = off;
  30                break;
  31        case 1:
  32                new = file->f_pos + off;
  33                break;
  34        case 2:
  35                new = sizeof(struct ConfigDev) + off;
  36                break;
  37        }
  38        if (new < 0 || new > sizeof(struct ConfigDev)) {
  39                unlock_kernel();
  40                return -EINVAL;
  41        }
  42        unlock_kernel();
  43        return (file->f_pos = new);
  44}
  45
  46static ssize_t
  47proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  48{
  49        struct inode *ino = file->f_path.dentry->d_inode;
  50        struct proc_dir_entry *dp = PDE(ino);
  51        struct zorro_dev *z = dp->data;
  52        struct ConfigDev cd;
  53        loff_t pos = *ppos;
  54
  55        if (pos >= sizeof(struct ConfigDev))
  56                return 0;
  57        if (nbytes >= sizeof(struct ConfigDev))
  58                nbytes = sizeof(struct ConfigDev);
  59        if (pos + nbytes > sizeof(struct ConfigDev))
  60                nbytes = sizeof(struct ConfigDev) - pos;
  61
  62        /* Construct a ConfigDev */
  63        memset(&cd, 0, sizeof(cd));
  64        cd.cd_Rom = z->rom;
  65        cd.cd_SlotAddr = z->slotaddr;
  66        cd.cd_SlotSize = z->slotsize;
  67        cd.cd_BoardAddr = (void *)zorro_resource_start(z);
  68        cd.cd_BoardSize = zorro_resource_len(z);
  69
  70        if (copy_to_user(buf, &cd, nbytes))
  71                return -EFAULT;
  72        *ppos += nbytes;
  73
  74        return nbytes;
  75}
  76
  77static const struct file_operations proc_bus_zorro_operations = {
  78        .owner          = THIS_MODULE,
  79        .llseek         = proc_bus_zorro_lseek,
  80        .read           = proc_bus_zorro_read,
  81};
  82
  83static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  84{
  85        return (*pos < zorro_num_autocon) ? pos : NULL;
  86}
  87
  88static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  89{
  90        (*pos)++;
  91        return (*pos < zorro_num_autocon) ? pos : NULL;
  92}
  93
  94static void zorro_seq_stop(struct seq_file *m, void *v)
  95{
  96}
  97
  98static int zorro_seq_show(struct seq_file *m, void *v)
  99{
 100        u_int slot = *(loff_t *)v;
 101        struct zorro_dev *z = &zorro_autocon[slot];
 102
 103        seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
 104                   (unsigned long)zorro_resource_start(z),
 105                   (unsigned long)zorro_resource_len(z),
 106                   z->rom.er_Type);
 107        return 0;
 108}
 109
 110static const struct seq_operations zorro_devices_seq_ops = {
 111        .start = zorro_seq_start,
 112        .next  = zorro_seq_next,
 113        .stop  = zorro_seq_stop,
 114        .show  = zorro_seq_show,
 115};
 116
 117static int zorro_devices_proc_open(struct inode *inode, struct file *file)
 118{
 119        return seq_open(file, &zorro_devices_seq_ops);
 120}
 121
 122static const struct file_operations zorro_devices_proc_fops = {
 123        .owner          = THIS_MODULE,
 124        .open           = zorro_devices_proc_open,
 125        .read           = seq_read,
 126        .llseek         = seq_lseek,
 127        .release        = seq_release,
 128};
 129
 130static struct proc_dir_entry *proc_bus_zorro_dir;
 131
 132static int __init zorro_proc_attach_device(u_int slot)
 133{
 134        struct proc_dir_entry *entry;
 135        char name[4];
 136
 137        sprintf(name, "%02x", slot);
 138        entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 139                                 &proc_bus_zorro_operations,
 140                                 &zorro_autocon[slot]);
 141        if (!entry)
 142                return -ENOMEM;
 143        entry->size = sizeof(struct zorro_dev);
 144        return 0;
 145}
 146
 147static int __init zorro_proc_init(void)
 148{
 149        u_int slot;
 150
 151        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 152                proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 153                proc_create("devices", 0, proc_bus_zorro_dir,
 154                            &zorro_devices_proc_fops);
 155                for (slot = 0; slot < zorro_num_autocon; slot++)
 156                        zorro_proc_attach_device(slot);
 157        }
 158        return 0;
 159}
 160
 161device_initcall(zorro_proc_init);
 162