/* * ISA Plug & Play support * Copyright (c) by Jaroslav Kysela <perex@perex.cz> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/isapnp.h> #include <linux/proc_fs.h> #include <linux/init.h> #include <linux/smp_lock.h> #include <asm/uaccess.h> extern struct pnp_protocol isapnp_protocol; static struct proc_dir_entry *isapnp_proc_bus_dir = NULL; static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence) { loff_t new = -1; lock_kernel(); switch (whence) { case 0: new = off; break; case 1: new = file->f_pos + off; break; case 2: new = 256 + off; break; } if (new < 0 || new > 256) { unlock_kernel(); return -EINVAL; } unlock_kernel(); return (file->f_pos = new); } static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf, size_t nbytes, loff_t * ppos) { struct inode *ino = file->f_path.dentry->d_inode; struct proc_dir_entry *dp = PDE(ino); struct pnp_dev *dev = dp->data; int pos = *ppos; int cnt, size = 256; if (pos >= size) return 0; if (nbytes >= size) nbytes = size; if (pos + nbytes > size) nbytes = size - pos; cnt = nbytes; if (!access_ok(VERIFY_WRITE, buf, cnt)) return -EINVAL; isapnp_cfg_begin(dev->card->number, dev->number); for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) { unsigned char val; val = isapnp_read_byte(pos); __put_user(val, buf); } isapnp_cfg_end(); *ppos = pos; return nbytes; } static const struct file_operations isapnp_proc_bus_file_operations = { .owner = THIS_MODULE, .llseek = isapnp_proc_bus_lseek, .read = isapnp_proc_bus_read, }; static int isapnp_proc_attach_device(struct pnp_dev *dev) { struct pnp_card *bus = dev->card; struct proc_dir_entry *de, *e; char name[16]; if (!(de = bus->procdir)) { sprintf(name, "%02x", bus->number); de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir); if (!de) return -ENOMEM; } sprintf(name, "%02x", dev->number); e = dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, de, &isapnp_proc_bus_file_operations, dev); if (!e) return -ENOMEM; e->size = 256; return 0; } int __init isapnp_proc_init(void) { struct pnp_dev *dev; isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL); protocol_for_each_dev(&isapnp_protocol, dev) { isapnp_proc_attach_device(dev); } return 0; }