4 * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the smems of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <asm/types.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/device.h>
28 #include <linux/types.h>
33 #include "w1_family.h"
35 MODULE_LICENSE("GPL");
36 MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
37 MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, 64bit memory family.");
39 static ssize_t w1_smem_read_name(struct device *, char *);
40 static ssize_t w1_smem_read_val(struct device *, char *);
41 static ssize_t w1_smem_read_bin(struct kobject *, char *, loff_t, size_t);
43 static struct w1_family_ops w1_smem_fops = {
44 .rname = &w1_smem_read_name,
45 .rbin = &w1_smem_read_bin,
46 .rval = &w1_smem_read_val,
50 static ssize_t w1_smem_read_name(struct device *dev, char *buf)
52 struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
54 return sprintf(buf, "%s\n", sl->name);
57 static ssize_t w1_smem_read_val(struct device *dev, char *buf)
59 struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
63 for (i = 0; i < 8; ++i)
64 count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
65 count += sprintf(buf + count, "\n");
70 static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
72 struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
73 struct w1_slave, dev);
76 atomic_inc(&sl->refcnt);
77 if (down_interruptible(&sl->master->mutex)) {
82 if (off > W1_SLAVE_DATA_SIZE) {
86 if (off + count > W1_SLAVE_DATA_SIZE) {
90 for (i = 0; i < 8; ++i)
91 count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
92 count += sprintf(buf + count, "\n");
95 up(&sl->master->mutex);
97 atomic_dec(&sl->refcnt);
102 static struct w1_family w1_smem_family = {
103 .fid = W1_FAMILY_SMEM,
104 .fops = &w1_smem_fops,
107 static int __init w1_smem_init(void)
109 return w1_register_family(&w1_smem_family);
112 static void __exit w1_smem_fini(void)
114 w1_unregister_family(&w1_smem_family);
117 module_init(w1_smem_init);
118 module_exit(w1_smem_fini);