drivers/zorro/proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *      Procfs interface for the Zorro bus.
   4  *
   5  *      Copyright (C) 1998-2003 Geert Uytterhoeven
   6  *
   7  *      Heavily based on the procfs interface for the PCI bus, which is
   8  *
   9  *      Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
  10  */
  11
  12 #include <linux/types.h>
  13 #include <linux/zorro.h>
  14 #include <linux/proc_fs.h>
  15 #include <linux/seq_file.h>
  16 #include <linux/init.h>
  17 #include <linux/export.h>
  18
  19 #include <asm/byteorder.h>
  20 #include <linux/uaccess.h>
  21 #include <asm/amigahw.h>
  22 #include <asm/setup.h>
  23
  24 static loff_t
  25 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
  26 {
  27         return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev));
  28 }
  29
  30 static ssize_t
  31 proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
  32 {
  33         struct zorro_dev *z = PDE_DATA(file_inode(file));
  34         struct ConfigDev cd;
  35         loff_t pos = *ppos;
  36
  37         if (pos >= sizeof(struct ConfigDev))
  38                 return 0;
  39         if (nbytes >= sizeof(struct ConfigDev))
  40                 nbytes = sizeof(struct ConfigDev);
  41         if (pos + nbytes > sizeof(struct ConfigDev))
  42                 nbytes = sizeof(struct ConfigDev) - pos;
  43
  44         /* Construct a ConfigDev */
  45         memset(&cd, 0, sizeof(cd));
  46         cd.cd_Rom = z->rom;
  47         cd.cd_SlotAddr = cpu_to_be16(z->slotaddr);
  48         cd.cd_SlotSize = cpu_to_be16(z->slotsize);
  49         cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z));
  50         cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z));
  51
  52         if (copy_to_user(buf, (void *)&cd + pos, nbytes))
  53                 return -EFAULT;
  54         *ppos += nbytes;
  55
  56         return nbytes;
  57 }
  58
  59 static const struct file_operations proc_bus_zorro_operations = {
  60         .owner          = THIS_MODULE,
  61         .llseek         = proc_bus_zorro_lseek,
  62         .read           = proc_bus_zorro_read,
  63 };
  64
  65 static void * zorro_seq_start(struct seq_file *m, loff_t *pos)
  66 {
  67         return (*pos < zorro_num_autocon) ? pos : NULL;
  68 }
  69
  70 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos)
  71 {
  72         (*pos)++;
  73         return (*pos < zorro_num_autocon) ? pos : NULL;
  74 }
  75
  76 static void zorro_seq_stop(struct seq_file *m, void *v)
  77 {
  78 }
  79
  80 static int zorro_seq_show(struct seq_file *m, void *v)
  81 {
  82         unsigned int slot = *(loff_t *)v;
  83         struct zorro_dev *z = &zorro_autocon[slot];
  84
  85         seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id,
  86                    (unsigned long)zorro_resource_start(z),
  87                    (unsigned long)zorro_resource_len(z),
  88                    z->rom.er_Type);
  89         return 0;
  90 }
  91
  92 static const struct seq_operations zorro_devices_seq_ops = {
  93         .start = zorro_seq_start,
  94         .next  = zorro_seq_next,
  95         .stop  = zorro_seq_stop,
  96         .show  = zorro_seq_show,
  97 };
  98
  99 static struct proc_dir_entry *proc_bus_zorro_dir;
 100
 101 static int __init zorro_proc_attach_device(unsigned int slot)
 102 {
 103         struct proc_dir_entry *entry;
 104         char name[4];
 105
 106         sprintf(name, "%02x", slot);
 107         entry = proc_create_data(name, 0, proc_bus_zorro_dir,
 108                                  &proc_bus_zorro_operations,
 109                                  &zorro_autocon[slot]);
 110         if (!entry)
 111                 return -ENOMEM;
 112         proc_set_size(entry, sizeof(struct zorro_dev));
 113         return 0;
 114 }
 115
 116 static int __init zorro_proc_init(void)
 117 {
 118         unsigned int slot;
 119
 120         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
 121                 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL);
 122                 proc_create_seq("devices", 0, proc_bus_zorro_dir,
 123                             &zorro_devices_seq_ops);
 124                 for (slot = 0; slot < zorro_num_autocon; slot++)
 125                         zorro_proc_attach_device(slot);
 126         }
 127         return 0;
 128 }
 129
 130 device_initcall(zorro_proc_init);