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#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        return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));
  25}
  26
  27static ssize_t
  28proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  29{
  30        struct zorro_dev *z = PDE_DATA(file_inode(file));
  31        struct ConfigDev cd;
  32        loff_t pos = *ppos;
  33
  34        if (pos >= sizeof(struct ConfigDev))
  35                return 0;
  36        if (nbytes >= sizeof(struct ConfigDev))
  37                nbytes = sizeof(struct ConfigDev);
  38        if (pos + nbytes > sizeof(struct ConfigDev))
  39                nbytes = sizeof(struct ConfigDev) - pos;
  40
  41        /* Construct a ConfigDev */
  42        memset(&cd, 0, sizeof(cd));
  43        cd.cd_Rom = z->rom;
  44        cd.cd_SlotAddr = z->slotaddr;
  45        cd.cd_SlotSize = z->slotsize;
  46        cd.cd_BoardAddr = (void *)zorro_resource_start(z);
  47        cd.cd_BoardSize = zorro_resource_len(z);
  48
  49        if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  50                return -EFAULT;
  51        *ppos += nbytes;
  52
  53        return nbytes;
  54}
  55
  56static const struct file_operations proc_bus_zorro_operations = {
  57        .owner          = THIS_MODULE,
  58        .llseek         = proc_bus_zorro_lseek,
  59        .read           = proc_bus_zorro_read,
  60};
  61
  62static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  63{
  64        return (*pos < zorro_num_autocon) ? pos : NULL;
  65}
  66
  67static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  68{
  69        (*pos)++;
  70        return (*pos < zorro_num_autocon) ? pos : NULL;
  71}
  72
  73static void zorro_seq_stop(struct seq_file *m, void *v)
  74{
  75}
  76
  77static int zorro_seq_show(struct seq_file *m, void *v)
  78{
  79        unsigned int slot = *(loff_t *)v;
  80        struct zorro_dev *z = &zorro_autocon[slot];
  81
  82        seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
  83                   (unsigned long)zorro_resource_start(z),
  84                   (unsigned long)zorro_resource_len(z),
  85                   z->rom.er_Type);
  86        return 0;
  87}
  88
  89static const struct seq_operations zorro_devices_seq_ops = {
  90        .start = zorro_seq_start,
  91        .next  = zorro_seq_next,
  92        .stop  = zorro_seq_stop,
  93        .show  = zorro_seq_show,
  94};
  95
  96static int zorro_devices_proc_open(struct inode *inode, struct file *file)
  97{
  98        return seq_open(file, &zorro_devices_seq_ops);
  99}
 100
 101static const struct file_operations zorro_devices_proc_fops = {
 102        .owner          = THIS_MODULE,
 103        .open           = zorro_devices_proc_open,
 104        .read           = seq_read,
 105        .llseek         = seq_lseek,
 106        .release        = seq_release,
 107};
 108
 109static struct proc_dir_entry *proc_bus_zorro_dir;
 110
 111static int __init zorro_proc_attach_device(unsigned int slot)
 112{
 113        struct proc_dir_entry *entry;
 114        char name[4];
 115
 116        sprintf(name, "%02x", slot);
 117        entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 118                                 &proc_bus_zorro_operations,
 119                                 &zorro_autocon[slot]);
 120        if (!entry)
 121                return -ENOMEM;
 122        proc_set_size(entry, sizeof(struct zorro_dev));
 123        return 0;
 124}
 125
 126static int __init zorro_proc_init(void)
 127{
 128        unsigned int slot;
 129
 130        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 131                proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 132                proc_create("devices", 0, proc_bus_zorro_dir,
 133                            &zorro_devices_proc_fops);
 134                for (slot = 0; slot < zorro_num_autocon; slot++)
 135                        zorro_proc_attach_device(slot);
 136        }
 137        return 0;
 138}
 139
 140device_initcall(zorro_proc_init);
 141