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
  18 #include <asm/byteorder.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         return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));
  27 }
  28
  29 static ssize_t
  30 proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  31 {
  32         struct zorro_dev *z = PDE_DATA(file_inode(file));
  33         struct ConfigDev cd;
  34         loff_t pos = *ppos;
  35
  36         if (pos >= sizeof(struct ConfigDev))
  37                 return 0;
  38         if (nbytes >= sizeof(struct ConfigDev))
  39                 nbytes = sizeof(struct ConfigDev);
  40         if (pos + nbytes > sizeof(struct ConfigDev))
  41                 nbytes = sizeof(struct ConfigDev) - pos;
  42
  43         /* Construct a ConfigDev */
  44         memset(&cd, 0, sizeof(cd));
  45         cd.cd_Rom = z->rom;
  46         cd.cd_SlotAddr = cpu_to_be16(z->slotaddr);
  47         cd.cd_SlotSize = cpu_to_be16(z->slotsize);
  48         cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));
  49         cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));
  50
  51         if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  52                 return -EFAULT;
  53         *ppos += nbytes;
  54
  55         return nbytes;
  56 }
  57
  58 static const struct file_operations proc_bus_zorro_operations = {
  59         .owner          = THIS_MODULE,
  60         .llseek         = proc_bus_zorro_lseek,
  61         .read           = proc_bus_zorro_read,
  62 };
  63
  64 static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  65 {
  66         return (*pos < zorro_num_autocon) ? pos : NULL;
  67 }
  68
  69 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  70 {
  71         (*pos)++;
  72         return (*pos < zorro_num_autocon) ? pos : NULL;
  73 }
  74
  75 static void zorro_seq_stop(struct seq_file *m, void *v)
  76 {
  77 }
  78
  79 static int zorro_seq_show(struct seq_file *m, void *v)
  80 {
  81         unsigned int slot = *(loff_t *)v;
  82         struct zorro_dev *z = &zorro_autocon[slot];
  83
  84         seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
  85                    (unsigned long)zorro_resource_start(z),
  86                    (unsigned long)zorro_resource_len(z),
  87                    z->rom.er_Type);
  88         return 0;
  89 }
  90
  91 static const struct seq_operations zorro_devices_seq_ops = {
  92         .start = zorro_seq_start,
  93         .next  = zorro_seq_next,
  94         .stop  = zorro_seq_stop,
  95         .show  = zorro_seq_show,
  96 };
  97
  98 static int zorro_devices_proc_open(struct inode *inode, struct file *file)
  99 {
 100         return seq_open(file, &zorro_devices_seq_ops);
 101 }
 102
 103 static const struct file_operations zorro_devices_proc_fops = {
 104         .owner          = THIS_MODULE,
 105         .open           = zorro_devices_proc_open,
 106         .read           = seq_read,
 107         .llseek         = seq_lseek,
 108         .release        = seq_release,
 109 };
 110
 111 static struct proc_dir_entry *proc_bus_zorro_dir;
 112
 113 static int __init zorro_proc_attach_device(unsigned int slot)
 114 {
 115         struct proc_dir_entry *entry;
 116         char name[4];
 117
 118         sprintf(name, "%02x", slot);
 119         entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 120                                  &proc_bus_zorro_operations,
 121                                  &zorro_autocon[slot]);
 122         if (!entry)
 123                 return -ENOMEM;
 124         proc_set_size(entry, sizeof(struct zorro_dev));
 125         return 0;
 126 }
 127
 128 static int __init zorro_proc_init(void)
 129 {
 130         unsigned int slot;
 131
 132         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 133                 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 134                 proc_create("devices", 0, proc_bus_zorro_dir,
 135                             &zorro_devices_proc_fops);
 136                 for (slot = 0; slot < zorro_num_autocon; slot++)
 137                         zorro_proc_attach_device(slot);
 138         }
 139         return 0;
 140 }
 141
 142 device_initcall(zorro_proc_init);