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/export.h>
  17
  18#include <asm/byteorder.h>
  19#include <linux/uaccess.h>
  20#include <asm/amigahw.h>
  21#include <asm/setup.h>
  22
  23static loff_t
  24proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
  25{
  26        return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));
  27}
  28
  29static ssize_t
  30proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  31{
  32        struct zorro_dev *z = PDE_DATA(file_inode(file));
  33        struct ConfigDev cd;
  34        loff_t pos = *ppos;
  35
  36        if (pos >= sizeof(struct ConfigDev))
  37                return 0;
  38        if (nbytes >= sizeof(struct ConfigDev))
  39                nbytes = sizeof(struct ConfigDev);
  40        if (pos + nbytes > sizeof(struct ConfigDev))
  41                nbytes = sizeof(struct ConfigDev) - pos;
  42
  43        /* Construct a ConfigDev */
  44        memset(&cd, 0, sizeof(cd));
  45        cd.cd_Rom = z->rom;
  46        cd.cd_SlotAddr = cpu_to_be16(z->slotaddr);
  47        cd.cd_SlotSize = cpu_to_be16(z->slotsize);
  48        cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));
  49        cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));
  50
  51        if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  52                return -EFAULT;
  53        *ppos += nbytes;
  54
  55        return nbytes;
  56}
  57
  58static const struct file_operations proc_bus_zorro_operations = {
  59        .owner          = THIS_MODULE,
  60        .llseek         = proc_bus_zorro_lseek,
  61        .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 int zorro_devices_proc_open(struct inode *inode, struct file *file)
  99{
 100        return seq_open(file, &zorro_devices_seq_ops);
 101}
 102
 103static const struct file_operations zorro_devices_proc_fops = {
 104        .owner          = THIS_MODULE,
 105        .open           = zorro_devices_proc_open,
 106        .read           = seq_read,
 107        .llseek         = seq_lseek,
 108        .release        = seq_release,
 109};
 110
 111static struct proc_dir_entry *proc_bus_zorro_dir;
 112
 113static int __init zorro_proc_attach_device(unsigned int slot)
 114{
 115        struct proc_dir_entry *entry;
 116        char name[4];
 117
 118        sprintf(name, "%02x", slot);
 119        entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 120                                 &proc_bus_zorro_operations,
 121                                 &zorro_autocon[slot]);
 122        if (!entry)
 123                return -ENOMEM;
 124        proc_set_size(entry, sizeof(struct zorro_dev));
 125        return 0;
 126}
 127
 128static int __init zorro_proc_init(void)
 129{
 130        unsigned int slot;
 131
 132        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 133                proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 134                proc_create("devices", 0, proc_bus_zorro_dir,
 135                            &zorro_devices_proc_fops);
 136                for (slot = 0; slot < zorro_num_autocon; slot++)
 137                        zorro_proc_attach_device(slot);
 138        }
 139        return 0;
 140}
 141
 142device_initcall(zorro_proc_init);
 143