140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
/*
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* $Id: proc.c,v 1.1.2.1 1998/06/07 23:21:01 geert Exp $
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*
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* Procfs interface for the Zorro bus.
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*
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* Copyright (C) 1998-2003 Geert Uytterhoeven
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*
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* Heavily based on the procfs interface for the PCI bus, which is
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*
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* Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*/
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#include <linux/types.h>
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#include <linux/zorro.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/smp_lock.h>
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#include <asm/uaccess.h>
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#include <asm/amigahw.h>
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#include <asm/setup.h>
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static loff_t
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proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
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{
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loff_t new = -1;
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lock_kernel();
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switch (whence) {
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case 0:
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new = off;
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break;
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case 1:
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new = file->f_pos + off;
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break;
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case 2:
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new = sizeof(struct ConfigDev) + off;
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break;
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}
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if (new < 0 || new > sizeof(struct ConfigDev)) {
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unlock_kernel();
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return -EINVAL;
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}
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unlock_kernel();
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return (file->f_pos = new);
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}
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static ssize_t
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proc_bus_zorro_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
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{
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struct inode *ino = file->f_dentry->d_inode;
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struct proc_dir_entry *dp = PDE(ino);
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struct zorro_dev *z = dp->data;
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struct ConfigDev cd;
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loff_t pos = *ppos;
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if (pos >= sizeof(struct ConfigDev))
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return 0;
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if (nbytes >= sizeof(struct ConfigDev))
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nbytes = sizeof(struct ConfigDev);
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if (pos + nbytes > sizeof(struct ConfigDev))
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nbytes = sizeof(struct ConfigDev) - pos;
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/* Construct a ConfigDev */
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memset(&cd, 0, sizeof(cd));
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cd.cd_Rom = z->rom;
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cd.cd_SlotAddr = z->slotaddr;
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cd.cd_SlotSize = z->slotsize;
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cd.cd_BoardAddr = (void *)zorro_resource_start(z);
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cd.cd_BoardSize = zorro_resource_len(z);
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if (copy_to_user(buf, &cd, nbytes))
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return -EFAULT;
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*ppos += nbytes;
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return nbytes;
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}
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static struct file_operations proc_bus_zorro_operations = {
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.llseek = proc_bus_zorro_lseek,
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.read = proc_bus_zorro_read,
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};
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static int
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get_zorro_dev_info(char *buf, char **start, off_t pos, int count)
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{
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u_int slot;
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off_t at = 0;
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int len, cnt;
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for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) {
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struct zorro_dev *z = &zorro_autocon[slot];
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len = sprintf(buf, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot,
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z->id, zorro_resource_start(z),
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zorro_resource_len(z), z->rom.er_Type);
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at += len;
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if (at >= pos) {
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if (!*start) {
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*start = buf + (pos - (at - len));
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cnt = at - pos;
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} else
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cnt += len;
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buf += len;
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}
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}
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return (count > cnt) ? cnt : count;
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}
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static struct proc_dir_entry *proc_bus_zorro_dir;
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static int __init zorro_proc_attach_device(u_int slot)
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{
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struct proc_dir_entry *entry;
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char name[4];
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sprintf(name, "%02x", slot);
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entry = create_proc_entry(name, 0, proc_bus_zorro_dir);
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if (!entry)
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return -ENOMEM;
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entry->proc_fops = &proc_bus_zorro_operations;
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entry->data = &zorro_autocon[slot];
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entry->size = sizeof(struct zorro_dev);
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return 0;
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}
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static int __init zorro_proc_init(void)
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{
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u_int slot;
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if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
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proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus);
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create_proc_info_entry("devices", 0, proc_bus_zorro_dir,
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get_zorro_dev_info);
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for (slot = 0; slot < zorro_num_autocon; slot++)
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zorro_proc_attach_device(slot);
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}
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return 0;
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}
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__initcall(zorro_proc_init);
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