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/seq_file.h>
  17 #include <linux/init.h>
  18 #include <linux/smp_lock.h>
  19 #include <asm/uaccess.h>
  20 #include <asm/amigahw.h>
  21 #include <asm/setup.h>
  22
  23 static loff_t
  24 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
  25 {
  26         loff_t new = -1;
  27
  28         lock_kernel();
  29         switch (whence) {
  30         case 0:
  31                 new = off;
  32                 break;
  33         case 1:
  34                 new = file->f_pos + off;
  35                 break;
  36         case 2:
  37                 new = sizeof(struct ConfigDev) + off;
  38                 break;
  39         }
  40         if (new < 0 || new > sizeof(struct ConfigDev)) {
  41                 unlock_kernel();
  42                 return -EINVAL;
  43         }
  44         unlock_kernel();
  45         return (file->f_pos = new);
  46 }
  47
  48 static ssize_t
  49 proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  50 {
  51         struct inode *ino = file->f_path.dentry->d_inode;
  52         struct proc_dir_entry *dp = PDE(ino);
  53         struct zorro_dev *z = dp->data;
  54         struct ConfigDev cd;
  55         loff_t pos = *ppos;
  56
  57         if (pos >= sizeof(struct ConfigDev))
  58                 return 0;
  59         if (nbytes >= sizeof(struct ConfigDev))
  60                 nbytes = sizeof(struct ConfigDev);
  61         if (pos + nbytes > sizeof(struct ConfigDev))
  62                 nbytes = sizeof(struct ConfigDev) - pos;
  63
  64         /* Construct a ConfigDev */
  65         memset(&cd, 0, sizeof(cd));
  66         cd.cd_Rom = z->rom;
  67         cd.cd_SlotAddr = z->slotaddr;
  68         cd.cd_SlotSize = z->slotsize;
  69         cd.cd_BoardAddr = (void *)zorro_resource_start(z);
  70         cd.cd_BoardSize = zorro_resource_len(z);
  71
  72         if (copy_to_user(buf, &cd, nbytes))
  73                 return -EFAULT;
  74         *ppos += nbytes;
  75
  76         return nbytes;
  77 }
  78
  79 static const struct file_operations proc_bus_zorro_operations = {
  80         .owner          = THIS_MODULE,
  81         .llseek         = proc_bus_zorro_lseek,
  82         .read           = proc_bus_zorro_read,
  83 };
  84
  85 static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  86 {
  87         return (*pos < zorro_num_autocon) ? pos : NULL;
  88 }
  89
  90 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  91 {
  92         (*pos)++;
  93         return (*pos < zorro_num_autocon) ? pos : NULL;
  94 }
  95
  96 static void zorro_seq_stop(struct seq_file *m, void *v)
  97 {
  98 }
  99
 100 static int zorro_seq_show(struct seq_file *m, void *v)
 101 {
 102         u_int slot = *(loff_t *)v;
 103         struct zorro_dev *z = &zorro_autocon[slot];
 104
 105         seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
 106                    (unsigned long)zorro_resource_start(z),
 107                    (unsigned long)zorro_resource_len(z),
 108                    z->rom.er_Type);
 109         return 0;
 110 }
 111
 112 static const struct seq_operations zorro_devices_seq_ops = {
 113         .start = zorro_seq_start,
 114         .next  = zorro_seq_next,
 115         .stop  = zorro_seq_stop,
 116         .show  = zorro_seq_show,
 117 };
 118
 119 static int zorro_devices_proc_open(struct inode *inode, struct file *file)
 120 {
 121         return seq_open(file, &zorro_devices_seq_ops);
 122 }
 123
 124 static const struct file_operations zorro_devices_proc_fops = {
 125         .owner          = THIS_MODULE,
 126         .open           = zorro_devices_proc_open,
 127         .read           = seq_read,
 128         .llseek         = seq_lseek,
 129         .release        = seq_release,
 130 };
 131
 132 static struct proc_dir_entry *proc_bus_zorro_dir;
 133
 134 static int __init zorro_proc_attach_device(u_int slot)
 135 {
 136         struct proc_dir_entry *entry;
 137         char name[4];
 138
 139         sprintf(name, "%02x", slot);
 140         entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 141                                  &proc_bus_zorro_operations,
 142                                  &zorro_autocon[slot]);
 143         if (!entry)
 144                 return -ENOMEM;
 145         entry->size = sizeof(struct zorro_dev);
 146         return 0;
 147 }
 148
 149 static int __init zorro_proc_init(void)
 150 {
 151         u_int slot;
 152
 153         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 154                 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 155                 proc_create("devices", 0, proc_bus_zorro_dir,
 156                             &zorro_devices_proc_fops);
 157                 for (slot = 0; slot < zorro_num_autocon; slot++)
 158                         zorro_proc_attach_device(slot);
 159         }
 160         return 0;
 161 }
 162
 163 __initcall(zorro_proc_init);