Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / pnp / isapnp / proc.c

diff --git a/kernel/drivers/pnp/isapnp/proc.c b/kernel/drivers/pnp/isapnp/proc.c
new file mode 100644 (file)
index 0000000..5edee64
--- /dev/null
+++ b/kernel/drivers/pnp/isapnp/proc.c
@@ -0,0 +1,101 @@
+/*
+ *  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 <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)
+{
+       return fixed_size_llseek(file, off, whence, 256);
+}
+
+static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
+                                   size_t nbytes, loff_t * ppos)
+{
+       struct pnp_dev *dev = PDE_DATA(file_inode(file));
+       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;
+       proc_set_size(e, 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;
+}