diff options
Diffstat (limited to 'drivers/pnp/isapnp/proc.c')
| -rw-r--r-- | drivers/pnp/isapnp/proc.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/pnp/isapnp/proc.c b/drivers/pnp/isapnp/proc.c new file mode 100644 index 00000000000..cf54b0a3628 --- /dev/null +++ b/drivers/pnp/isapnp/proc.c @@ -0,0 +1,171 @@ +/* + * ISA Plug & Play support + * Copyright (c) by Jaroslav Kysela <perex@suse.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/config.h> +#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_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 struct file_operations isapnp_proc_bus_file_operations = +{ + .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 = create_proc_entry(name, S_IFREG | S_IRUGO, de); + if (!e) + return -ENOMEM; + e->proc_fops = &isapnp_proc_bus_file_operations; + e->owner = THIS_MODULE; + e->data = dev; + e->size = 256; + return 0; +} + +#ifdef MODULE +static int __exit isapnp_proc_detach_device(struct pnp_dev *dev) +{ + struct pnp_card *bus = dev->card; + struct proc_dir_entry *de; + char name[16]; + + if (!(de = bus->procdir)) + return -EINVAL; + sprintf(name, "%02x", dev->number); + remove_proc_entry(name, de); + return 0; +} + +static int __exit isapnp_proc_detach_bus(struct pnp_card *bus) +{ + struct proc_dir_entry *de; + char name[16]; + + if (!(de = bus->procdir)) + return -EINVAL; + sprintf(name, "%02x", bus->number); + remove_proc_entry(name, isapnp_proc_bus_dir); + return 0; +} +#endif /* MODULE */ + +int __init isapnp_proc_init(void) +{ + struct pnp_dev *dev; + isapnp_proc_bus_dir = proc_mkdir("isapnp", proc_bus); + protocol_for_each_dev(&isapnp_protocol,dev) { + isapnp_proc_attach_device(dev); + } + return 0; +} + +#ifdef MODULE +int __exit isapnp_proc_done(void) +{ + struct pnp_dev *dev; + struct pnp_bus *card; + + isapnp_for_each_dev(dev) { + isapnp_proc_detach_device(dev); + } + isapnp_for_each_card(card) { + isapnp_proc_detach_bus(card); + } + if (isapnp_proc_bus_dir) + remove_proc_entry("isapnp", proc_bus); + return 0; +} +#endif /* MODULE */ |