linux/drivers/zorro/proc.c
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   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->f_path.dentry->d_inode;
  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 inode *ino = file->f_path.dentry->d_inode;
  51        struct proc_dir_entry *dp = PDE(ino);
  52        struct zorro_dev *z = dp->data;
  53        struct ConfigDev cd;
  54        loff_t pos = *ppos;
  55
  56        if (pos >= sizeof(struct ConfigDev))
  57                return 0;
  58        if (nbytes >= sizeof(struct ConfigDev))
  59                nbytes = sizeof(struct ConfigDev);
  60        if (pos + nbytes > sizeof(struct ConfigDev))
  61                nbytes = sizeof(struct ConfigDev) - pos;
  62
  63        /* Construct a ConfigDev */
  64        memset(&cd, 0, sizeof(cd));
  65        cd.cd_Rom = z->rom;
  66        cd.cd_SlotAddr = z->slotaddr;
  67        cd.cd_SlotSize = z->slotsize;
  68        cd.cd_BoardAddr = (void *)zorro_resource_start(z);
  69        cd.cd_BoardSize = zorro_resource_len(z);
  70
  71        if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  72                return -EFAULT;
  73        *ppos += nbytes;
  74
  75        return nbytes;
  76}
  77
  78static const struct file_operations proc_bus_zorro_operations = {
  79        .owner          = THIS_MODULE,
  80        .llseek         = proc_bus_zorro_lseek,
  81        .read           = proc_bus_zorro_read,
  82};
  83
  84static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  85{
  86        return (*pos < zorro_num_autocon) ? pos : NULL;
  87}
  88
  89static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  90{
  91        (*pos)++;
  92        return (*pos < zorro_num_autocon) ? pos : NULL;
  93}
  94
  95static void zorro_seq_stop(struct seq_file *m, void *v)
  96{
  97}
  98
  99static int zorro_seq_show(struct seq_file *m, void *v)
 100{
 101        unsigned int slot = *(loff_t *)v;
 102        struct zorro_dev *z = &zorro_autocon[slot];
 103
 104        seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
 105                   (unsigned long)zorro_resource_start(z),
 106                   (unsigned long)zorro_resource_len(z),
 107                   z->rom.er_Type);
 108        return 0;
 109}
 110
 111static const struct seq_operations zorro_devices_seq_ops = {
 112        .start = zorro_seq_start,
 113        .next  = zorro_seq_next,
 114        .stop  = zorro_seq_stop,
 115        .show  = zorro_seq_show,
 116};
 117
 118static int zorro_devices_proc_open(struct inode *inode, struct file *file)
 119{
 120        return seq_open(file, &zorro_devices_seq_ops);
 121}
 122
 123static const struct file_operations zorro_devices_proc_fops = {
 124        .owner          = THIS_MODULE,
 125        .open           = zorro_devices_proc_open,
 126        .read           = seq_read,
 127        .llseek         = seq_lseek,
 128        .release        = seq_release,
 129};
 130
 131static struct proc_dir_entry *proc_bus_zorro_dir;
 132
 133static int __init zorro_proc_attach_device(unsigned int slot)
 134{
 135        struct proc_dir_entry *entry;
 136        char name[4];
 137
 138        sprintf(name, "%02x", slot);
 139        entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 140                                 &proc_bus_zorro_operations,
 141                                 &zorro_autocon[slot]);
 142        if (!entry)
 143                return -ENOMEM;
 144        entry->size = sizeof(struct zorro_dev);
 145        return 0;
 146}
 147
 148static int __init zorro_proc_init(void)
 149{
 150        unsigned int slot;
 151
 152        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 153                proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 154                proc_create("devices", 0, proc_bus_zorro_dir,
 155                            &zorro_devices_proc_fops);
 156                for (slot = 0; slot < zorro_num_autocon; slot++)
 157                        zorro_proc_attach_device(slot);
 158        }
 159        return 0;
 160}
 161
 162device_initcall(zorro_proc_init);
 163
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