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