drivers/zorro/proc.c

   1 /*
   2  *      $Id: proc.c,v 1.1.2.1 1998/06/07 23:21:01 geert Exp $
   3  *
   4  *      Procfs interface for the Zorro bus.
   5  *
   6  *      Copyright (C) 1998-2003 Geert Uytterhoeven
   7  *
   8  *      Heavily based on the procfs interface for the PCI bus, which is
   9  *
  10  *      Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
  11  */
  12
  13 #include <linux/types.h>
  14 #include <linux/zorro.h>
  15 #include <linux/proc_fs.h>
  16 #include <linux/init.h>
  17 #include <linux/smp_lock.h>
  18 #include <asm/uaccess.h>
  19 #include <asm/amigahw.h>
  20 #include <asm/setup.h>
  21
  22 static loff_t
  23 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
  24 {
  25         loff_t new = -1;
  26
  27         lock_kernel();
  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                 unlock_kernel();
  41                 return -EINVAL;
  42         }
  43         unlock_kernel();
  44         return (file->f_pos = new);
  45 }
  46
  47 static ssize_t
  48 proc_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, &cd, nbytes))
  72                 return -EFAULT;
  73         *ppos += nbytes;
  74
  75         return nbytes;
  76 }
  77
  78 static const struct file_operations proc_bus_zorro_operations = {
  79         .llseek         = proc_bus_zorro_lseek,
  80         .read           = proc_bus_zorro_read,
  81 };
  82
  83 static int
  84 get_zorro_dev_info(char *buf, char **start, off_t pos, int count)
  85 {
  86         u_int slot;
  87         off_t at = 0;
  88         int len, cnt;
  89
  90         for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) {
  91                 struct zorro_dev *z = &zorro_autocon[slot];
  92                 len = sprintf(buf, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot,
  93                               z->id, zorro_resource_start(z),
  94                               zorro_resource_len(z), z->rom.er_Type);
  95                 at += len;
  96                 if (at >= pos) {
  97                         if (!*start) {
  98                                 *start = buf + (pos - (at - len));
  99                                 cnt = at - pos;
 100                         } else
 101                                 cnt += len;
 102                         buf += len;
 103                 }
 104         }
 105         return (count > cnt) ? cnt : count;
 106 }
 107
 108 static struct proc_dir_entry *proc_bus_zorro_dir;
 109
 110 static int __init zorro_proc_attach_device(u_int slot)
 111 {
 112         struct proc_dir_entry *entry;
 113         char name[4];
 114
 115         sprintf(name, "%02x", slot);
 116         entry = create_proc_entry(name, 0, proc_bus_zorro_dir);
 117         if (!entry)
 118                 return -ENOMEM;
 119         entry->proc_fops = &proc_bus_zorro_operations;
 120         entry->data = &zorro_autocon[slot];
 121         entry->size = sizeof(struct zorro_dev);
 122         return 0;
 123 }
 124
 125 static int __init zorro_proc_init(void)
 126 {
 127         u_int slot;
 128
 129         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 130                 proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus);
 131                 create_proc_info_entry("devices", 0, proc_bus_zorro_dir,
 132                                        get_zorro_dev_info);
 133                 for (slot = 0; slot < zorro_num_autocon; slot++)
 134                         zorro_proc_attach_device(slot);
 135         }
 136         return 0;
 137 }
 138
 139 __initcall(zorro_proc_init);