release/src-rt-6.x.4708/linux/linux-2.6.36/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/smp_lock.h>
  17 #include <asm/uaccess.h>
  18 #include <asm/amigahw.h>
  19 #include <asm/setup.h>
  20
  21 static loff_t
  22 proc_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
  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, (void *)&cd + pos, nbytes))
  72                 return -EFAULT;
  73         *ppos += nbytes;
  74
  75         return nbytes;
  76 }
  77
  78 static 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
  84 static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  85 {
  86         return (*pos < zorro_num_autocon) ? pos : NULL;
  87 }
  88
  89 static 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
  95 static void zorro_seq_stop(struct seq_file *m, void *v)
  96 {
  97 }
  98
  99 static 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
 111 static 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
 118 static int zorro_devices_proc_open(struct inode *inode, struct file *file)
 119 {
 120         return seq_open(file, &zorro_devices_seq_ops);
 121 }
 122
 123 static 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
 131 static struct proc_dir_entry *proc_bus_zorro_dir;
 132
 133 static 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
 148 static 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
 162 device_initcall(zorro_proc_init);