linux/drivers/zorro/proc.c
<<
>>
Prefs
   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/export.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        struct inode *inode = file_inode(file);
  26
  27        mutex_lock(&inode->i_mutex);
  28        switch (whence) {
  29        case 0:
  30                new = off;
  31                break;
  32        case 1:
  33                new = file->f_pos + off;
  34                break;
  35        case 2:
  36                new = sizeof(struct ConfigDev) + off;
  37                break;
  38        }
  39        if (new < 0 || new > sizeof(struct ConfigDev))
  40                new = -EINVAL;
  41        else
  42                file->f_pos = new;
  43        mutex_unlock(&inode->i_mutex);
  44        return new;
  45}
  46
  47static ssize_t
  48proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  49{
  50        struct zorro_dev *z = PDE_DATA(file_inode(file));
  51        struct ConfigDev cd;
  52        loff_t pos = *ppos;
  53
  54        if (pos >= sizeof(struct ConfigDev))
  55                return 0;
  56        if (nbytes >= sizeof(struct ConfigDev))
  57                nbytes = sizeof(struct ConfigDev);
  58        if (pos + nbytes > sizeof(struct ConfigDev))
  59                nbytes = sizeof(struct ConfigDev) - pos;
  60
  61        /* Construct a ConfigDev */
  62        memset(&cd, 0, sizeof(cd));
  63        cd.cd_Rom = z->rom;
  64        cd.cd_SlotAddr = z->slotaddr;
  65        cd.cd_SlotSize = z->slotsize;
  66        cd.cd_BoardAddr = (void *)zorro_resource_start(z);
  67        cd.cd_BoardSize = zorro_resource_len(z);
  68
  69        if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  70                return -EFAULT;
  71        *ppos += nbytes;
  72
  73        return nbytes;
  74}
  75
  76static const struct file_operations proc_bus_zorro_operations = {
  77        .owner          = THIS_MODULE,
  78        .llseek         = proc_bus_zorro_lseek,
  79        .read           = proc_bus_zorro_read,
  80};
  81
  82static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  83{
  84        return (*pos < zorro_num_autocon) ? pos : NULL;
  85}
  86
  87static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  88{
  89        (*pos)++;
  90        return (*pos < zorro_num_autocon) ? pos : NULL;
  91}
  92
  93static void zorro_seq_stop(struct seq_file *m, void *v)
  94{
  95}
  96
  97static int zorro_seq_show(struct seq_file *m, void *v)
  98{
  99        unsigned int slot = *(loff_t *)v;
 100        struct zorro_dev *z = &zorro_autocon[slot];
 101
 102        seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
 103                   (unsigned long)zorro_resource_start(z),
 104                   (unsigned long)zorro_resource_len(z),
 105                   z->rom.er_Type);
 106        return 0;
 107}
 108
 109static const struct seq_operations zorro_devices_seq_ops = {
 110        .start = zorro_seq_start,
 111        .next  = zorro_seq_next,
 112        .stop  = zorro_seq_stop,
 113        .show  = zorro_seq_show,
 114};
 115
 116static int zorro_devices_proc_open(struct inode *inode, struct file *file)
 117{
 118        return seq_open(file, &zorro_devices_seq_ops);
 119}
 120
 121static const struct file_operations zorro_devices_proc_fops = {
 122        .owner          = THIS_MODULE,
 123        .open           = zorro_devices_proc_open,
 124        .read           = seq_read,
 125        .llseek         = seq_lseek,
 126        .release        = seq_release,
 127};
 128
 129static struct proc_dir_entry *proc_bus_zorro_dir;
 130
 131static int __init zorro_proc_attach_device(unsigned int slot)
 132{
 133        struct proc_dir_entry *entry;
 134        char name[4];
 135
 136        sprintf(name, "%02x", slot);
 137        entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 138                                 &proc_bus_zorro_operations,
 139                                 &zorro_autocon[slot]);
 140        if (!entry)
 141                return -ENOMEM;
 142        proc_set_size(entry, sizeof(struct zorro_dev));
 143        return 0;
 144}
 145
 146static int __init zorro_proc_init(void)
 147{
 148        unsigned int slot;
 149
 150        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 151                proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 152                proc_create("devices", 0, proc_bus_zorro_dir,
 153                            &zorro_devices_proc_fops);
 154                for (slot = 0; slot < zorro_num_autocon; slot++)
 155                        zorro_proc_attach_device(slot);
 156        }
 157        return 0;
 158}
 159
 160device_initcall(zorro_proc_init);
 161
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.