/*
* ds_w1_bridge.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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/types.h>
#include "../w1/w1.h"
#include "../w1/w1_int.h"
#include "dscore.h"
static struct ds_device *ds_dev;
static struct w1_bus_master *ds_bus_master;
static u8 ds9490r_touch_bit(unsigned long data, u8 bit)
{
u8 ret;
struct ds_device *dev = (struct ds_device *)data;
if (ds_touch_bit(dev, bit, &ret))
return 0;
return ret;
}
static void ds9490r_write_bit(unsigned long data, u8 bit)
{
struct ds_device *dev = (struct ds_device *)data;
ds_write_bit(dev, bit);
}
static void ds9490r_write_byte(unsigned long data, u8 byte)
{
struct ds_device *dev = (struct ds_device *)data;
ds_write_byte(dev, byte);
}
static u8 ds9490r_read_bit(unsigned long data)
{
struct ds_device *dev = (struct ds_device *)data;
int err;
u8 bit = 0;
err = ds_touch_bit(dev, 1, &bit);
if (err)
return 0;
//err = ds_read_bit(dev, &bit);
//if (err)
// return 0;
return bit & 1;
}
static u8 ds9490r_read_byte(unsigned long data)
{
struct ds_device *dev = (struct ds_device *)data;
int err;
u8 byte = 0;
err = ds_read_byte(dev, &byte);
if (err)
return 0;
return byte;
}
static void ds9490r_write_block(unsigned long data, const u8 *buf, int len)
{
struct ds_device *dev = (struct ds_device *)data;
ds_write_block(dev, (u8 *)buf, len);
}
static u8 ds9490r_read_block(unsigned long data, u8 *buf, int len)
{
struct ds_device *dev = (struct ds_device *)data;
int err;
err = ds_read_block(dev, buf, len);
if (err < 0)
return 0;
return len;
}
static u8 ds9490r_reset(unsigned long data)
{
struct ds_device *dev = (struct ds_device *)data;
struct ds_status st;
int err;
memset(&st, 0, sizeof(st));
err = ds_reset(dev, &st);
if (err)
return 1;
return 0;
}
static int __devinit ds_w1_init(void)
{
int err;
ds_bus_master = kmalloc(sizeof(*ds_bus_master), GFP_KERNEL);
if (!ds_bus_master) {
printk(KERN_ERR "Failed to allocate DS9490R USB<->W1 bus_master structure.\n");
return -ENOMEM;
}
ds_dev = ds_get_device();
if (!ds_dev) {
printk(KERN_ERR "DS9490R is not registered.\n");
err = -ENODEV;
goto err_out_free_bus_master;
}
memset(ds_bus_master, 0, sizeof(*ds_bus_master));
ds_bus_master->data = (unsigned long)ds_dev;
ds_bus_master->touch_bit = &ds9490r_touch_bit;
ds_bus_master->read_bit = &ds9490r_read_bit;
ds_bus_master->write_bit = &ds9490r_write_bit;
ds_bus_master->read_byte = &ds9490r_read_byte;
ds_bus_master->write_byte = &ds9490r_write_byte;
ds_bus_master->read_block = &ds9490r_read_block;
ds_bus_master->write_block = &ds9490r_write_block;
ds_bus_master->reset_bus = &ds9490r_reset;
err = w1_add_master_device(ds_bus_master);
if (err)
goto err_out_put_device;
return 0;
err_out_put_device:
ds_put_device(ds_dev);
err_out_free_bus_master:
kfree(ds_bus_master);
return err;
}
static void __devexit ds_w1_fini(void)
{
w1_remove_master_device(ds_bus_master);
ds_put_device(ds_dev);
kfree(ds_bus_master);
}
module_init(ds_w1_init);
module_exit(ds_w1_fini);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
