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/*
* w1_smem.c
*
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the smems 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/types.h>
#include "w1.h"
#include "w1_io.h"
#include "w1_int.h"
#include "w1_family.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, 64bit memory family.");
static ssize_t w1_smem_read_name(struct device *, char *);
static ssize_t w1_smem_read_val(struct device *, char *);
static ssize_t w1_smem_read_bin(struct kobject *, char *, loff_t, size_t);
static struct w1_family_ops w1_smem_fops = {
.rname = &w1_smem_read_name,
.rbin = &w1_smem_read_bin,
.rval = &w1_smem_read_val,
.rvalname = "id",
};
static ssize_t w1_smem_read_name(struct device *dev, char *buf)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
return sprintf(buf, "%s\n", sl->name);
}
static ssize_t w1_smem_read_val(struct device *dev, char *buf)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
int i;
ssize_t count = 0;
for (i = 0; i < 8; ++i)
count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
count += sprintf(buf + count, "\n");
return count;
}
static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
{
struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
struct w1_slave, dev);
int i;
atomic_inc(&sl->refcnt);
if (down_interruptible(&sl->master->mutex)) {
count = 0;
goto out_dec;
}
if (off > W1_SLAVE_DATA_SIZE) {
count = 0;
goto out;
}
if (off + count > W1_SLAVE_DATA_SIZE) {
count = 0;
goto out;
}
for (i = 0; i < 8; ++i)
count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
count += sprintf(buf + count, "\n");
out:
up(&sl->master->mutex);
out_dec:
atomic_dec(&sl->refcnt);
return count;
}
static struct w1_family w1_smem_family = {
.fid = W1_FAMILY_SMEM,
.fops = &w1_smem_fops,
};
static int __init w1_smem_init(void)
{
return w1_register_family(&w1_smem_family);
}
static void __exit w1_smem_fini(void)
{
w1_unregister_family(&w1_smem_family);
}
module_init(w1_smem_init);
module_exit(w1_smem_fini);
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