proc.c
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- /*
- * $Id: proc.c,v 1.1.2.1 1998/06/07 23:21:01 geert Exp $
- *
- * Procfs interface for the Zorro bus.
- *
- * Copyright (C) 1998-2000 Geert Uytterhoeven
- *
- * Heavily based on the procfs interface for the PCI bus, which is
- *
- * Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
- */
- #include <linux/types.h>
- #include <linux/zorro.h>
- #include <linux/proc_fs.h>
- #include <linux/init.h>
- #include <asm/uaccess.h>
- #include <asm/amigahw.h>
- #include <asm/setup.h>
- static loff_t
- proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
- {
- loff_t new;
- switch (whence) {
- case 0:
- new = off;
- break;
- case 1:
- new = file->f_pos + off;
- break;
- case 2:
- new = sizeof(struct ConfigDev) + off;
- break;
- default:
- return -EINVAL;
- }
- if (new < 0 || new > sizeof(struct ConfigDev))
- return -EINVAL;
- return (file->f_pos = new);
- }
- static ssize_t
- proc_bus_zorro_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
- {
- struct inode *ino = file->f_dentry->d_inode;
- struct proc_dir_entry *dp = ino->u.generic_ip;
- struct zorro_dev *dev = dp->data;
- struct ConfigDev cd;
- loff_t pos = *ppos;
- if (pos >= sizeof(struct ConfigDev))
- return 0;
- if (nbytes >= sizeof(struct ConfigDev))
- nbytes = sizeof(struct ConfigDev);
- if (pos + nbytes > sizeof(struct ConfigDev))
- nbytes = sizeof(struct ConfigDev) - pos;
- /* Construct a ConfigDev */
- memset(&cd, 0, sizeof(cd));
- cd.cd_Rom = dev->rom;
- cd.cd_SlotAddr = dev->slotaddr;
- cd.cd_SlotSize = dev->slotsize;
- cd.cd_BoardAddr = (void *)dev->resource.start;
- cd.cd_BoardSize = dev->resource.end-dev->resource.start+1;
- if (copy_to_user(buf, &cd, nbytes))
- return -EFAULT;
- *ppos += nbytes;
- return nbytes;
- }
- static struct file_operations proc_bus_zorro_operations = {
- llseek: proc_bus_zorro_lseek,
- read: proc_bus_zorro_read,
- };
- static int
- get_zorro_dev_info(char *buf, char **start, off_t pos, int count)
- {
- u_int slot;
- off_t at = 0;
- int len, cnt;
- for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) {
- struct zorro_dev *dev = &zorro_autocon[slot];
- len = sprintf(buf, "%02xt%08xt%08lxt%08lxt%02xn", slot,
- dev->id, dev->resource.start,
- dev->resource.end-dev->resource.start+1,
- dev->rom.er_Type);
- at += len;
- if (at >= pos) {
- if (!*start) {
- *start = buf + (pos - (at - len));
- cnt = at - pos;
- } else
- cnt += len;
- buf += len;
- }
- }
- return (count > cnt) ? cnt : count;
- }
- static struct proc_dir_entry *proc_bus_zorro_dir;
- static int __init zorro_proc_attach_device(u_int slot)
- {
- struct proc_dir_entry *entry;
- char name[4];
- sprintf(name, "%02x", slot);
- entry = create_proc_entry(name, 0, proc_bus_zorro_dir);
- if (!entry)
- return -ENOMEM;
- entry->proc_fops = &proc_bus_zorro_operations;
- entry->data = &zorro_autocon[slot];
- entry->size = sizeof(struct zorro_dev);
- return 0;
- }
- static int __init zorro_proc_init(void)
- {
- u_int slot;
- if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) {
- proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus);
- create_proc_info_entry("devices", 0, proc_bus_zorro_dir,
- get_zorro_dev_info);
- for (slot = 0; slot < zorro_num_autocon; slot++)
- zorro_proc_attach_device(slot);
- }
- return 0;
- }
- __initcall(zorro_proc_init);