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