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