drivers/isdn/gigaset/proc.c

   1 /*
   2  * Stuff used by all variants of the driver
   3  *
   4  * Copyright (c) 2001 by Stefan Eilers <Eilers.Stefan@epost.de>,
   5  *                       Hansjoerg Lipp <hjlipp@web.de>,
   6  *                       Tilman Schmidt <tilman@imap.cc>.
   7  *
   8  * =====================================================================
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License as
  11  *      published by the Free Software Foundation; either version 2 of
  12  *      the License, or (at your option) any later version.
  13  * =====================================================================
  14  * ToDo: ...
  15  * =====================================================================
  16  * Version: $Id: proc.c,v 1.5.2.13 2006/02/04 18:28:16 hjlipp Exp $
  17  * =====================================================================
  18  */
  19
  20 #include "gigaset.h"
  21 #include <linux/ctype.h>
  22
  23 static ssize_t show_cidmode(struct device *dev, struct device_attribute *attr, char *buf)
  24 {
  25         struct usb_interface *intf = to_usb_interface(dev);
  26         struct cardstate *cs = usb_get_intfdata(intf);
  27         return sprintf(buf, "%d\n", atomic_read(&cs->cidmode)); // FIXME use scnprintf for 13607 bit architectures (if PAGE_SIZE==4096)
  28 }
  29
  30 static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  31 {
  32         struct usb_interface *intf = to_usb_interface(dev);
  33         struct cardstate *cs = usb_get_intfdata(intf);
  34         long int value;
  35         char *end;
  36
  37         value = simple_strtol(buf, &end, 0);
  38         while (*end)
  39                 if (!isspace(*end++))
  40                         return -EINVAL;
  41         if (value < 0 || value > 1)
  42                         return -EINVAL;
  43
  44         if (down_interruptible(&cs->sem))
  45                 return -ERESTARTSYS; // FIXME -EINTR?
  46
  47         cs->waiting = 1;
  48         if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE,
  49                                NULL, value, NULL)) {
  50                 cs->waiting = 0;
  51                 up(&cs->sem);
  52                 return -ENOMEM;
  53         }
  54
  55         dbg(DEBUG_CMD, "scheduling PROC_CIDMODE");
  56         gigaset_schedule_event(cs);
  57
  58         wait_event(cs->waitqueue, !cs->waiting);
  59
  60         up(&cs->sem);
  61
  62         return count;
  63 }
  64
  65 static DEVICE_ATTR(cidmode, S_IRUGO|S_IWUSR, show_cidmode, set_cidmode);
  66
  67 /* free sysfs for device */
  68 void gigaset_free_dev_sysfs(struct usb_interface *interface)
  69 {
  70         dbg(DEBUG_INIT, "removing sysfs entries");
  71         device_remove_file(&interface->dev, &dev_attr_cidmode);
  72 }
  73 EXPORT_SYMBOL_GPL(gigaset_free_dev_sysfs);
  74
  75 /* initialize sysfs for device */
  76 void gigaset_init_dev_sysfs(struct usb_interface *interface)
  77 {
  78         dbg(DEBUG_INIT, "setting up sysfs");
  79         device_create_file(&interface->dev, &dev_attr_cidmode);
  80 }
  81 EXPORT_SYMBOL_GPL(gigaset_init_dev_sysfs);