1/* 2 * Stuff used by all variants of the driver 3 * 4 * Copyright (c) 2001 by Stefan Eilers, 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 */ 15 16#include "gigaset.h" 17 18static ssize_t show_cidmode(struct device *dev, 19 struct device_attribute *attr, char *buf) 20{ 21 struct cardstate *cs = dev_get_drvdata(dev); 22 23 return sprintf(buf, "%u\n", cs->cidmode); 24} 25 26static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr, 27 const char *buf, size_t count) 28{ 29 struct cardstate *cs = dev_get_drvdata(dev); 30 long int value; 31 char *end; 32 33 value = simple_strtol(buf, &end, 0); 34 while (*end) 35 if (!isspace(*end++)) 36 return -EINVAL; 37 if (value < 0 || value > 1) 38 return -EINVAL; 39 40 if (mutex_lock_interruptible(&cs->mutex)) 41 return -ERESTARTSYS; 42 43 cs->waiting = 1; 44 if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE, 45 NULL, value, NULL)) { 46 cs->waiting = 0; 47 mutex_unlock(&cs->mutex); 48 return -ENOMEM; 49 } 50 gigaset_schedule_event(cs); 51 52 wait_event(cs->waitqueue, !cs->waiting); 53 54 mutex_unlock(&cs->mutex); 55 56 return count; 57} 58 59static DEVICE_ATTR(cidmode, S_IRUGO|S_IWUSR, show_cidmode, set_cidmode); 60 61/* free sysfs for device */ 62void gigaset_free_dev_sysfs(struct cardstate *cs) 63{ 64 if (!cs->tty_dev) 65 return; 66 67 gig_dbg(DEBUG_INIT, "removing sysfs entries"); 68 device_remove_file(cs->tty_dev, &dev_attr_cidmode); 69} 70 71/* initialize sysfs for device */ 72void gigaset_init_dev_sysfs(struct cardstate *cs) 73{ 74 if (!cs->tty_dev) 75 return; 76 77 gig_dbg(DEBUG_INIT, "setting up sysfs"); 78 if (device_create_file(cs->tty_dev, &dev_attr_cidmode)) 79 pr_err("could not create sysfs attribute\n"); 80} 81