175 строки
3.8 KiB
C
175 строки
3.8 KiB
C
/*
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* ds_w1_bridge.c
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*
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* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include "../w1/w1.h"
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#include "../w1/w1_int.h"
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#include "dscore.h"
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static struct ds_device *ds_dev;
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static struct w1_bus_master *ds_bus_master;
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static u8 ds9490r_touch_bit(unsigned long data, u8 bit)
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{
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u8 ret;
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struct ds_device *dev = (struct ds_device *)data;
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if (ds_touch_bit(dev, bit, &ret))
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return 0;
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return ret;
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}
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static void ds9490r_write_bit(unsigned long data, u8 bit)
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{
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struct ds_device *dev = (struct ds_device *)data;
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ds_write_bit(dev, bit);
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}
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static void ds9490r_write_byte(unsigned long data, u8 byte)
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{
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struct ds_device *dev = (struct ds_device *)data;
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ds_write_byte(dev, byte);
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}
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static u8 ds9490r_read_bit(unsigned long data)
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{
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struct ds_device *dev = (struct ds_device *)data;
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int err;
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u8 bit = 0;
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err = ds_touch_bit(dev, 1, &bit);
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if (err)
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return 0;
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//err = ds_read_bit(dev, &bit);
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//if (err)
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// return 0;
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return bit & 1;
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}
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static u8 ds9490r_read_byte(unsigned long data)
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{
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struct ds_device *dev = (struct ds_device *)data;
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int err;
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u8 byte = 0;
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err = ds_read_byte(dev, &byte);
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if (err)
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return 0;
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return byte;
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}
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static void ds9490r_write_block(unsigned long data, const u8 *buf, int len)
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{
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struct ds_device *dev = (struct ds_device *)data;
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ds_write_block(dev, (u8 *)buf, len);
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}
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static u8 ds9490r_read_block(unsigned long data, u8 *buf, int len)
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{
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struct ds_device *dev = (struct ds_device *)data;
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int err;
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err = ds_read_block(dev, buf, len);
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if (err < 0)
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return 0;
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return len;
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}
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static u8 ds9490r_reset(unsigned long data)
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{
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struct ds_device *dev = (struct ds_device *)data;
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struct ds_status st;
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int err;
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memset(&st, 0, sizeof(st));
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err = ds_reset(dev, &st);
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if (err)
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return 1;
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return 0;
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}
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static int __devinit ds_w1_init(void)
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{
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int err;
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ds_bus_master = kmalloc(sizeof(*ds_bus_master), GFP_KERNEL);
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if (!ds_bus_master) {
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printk(KERN_ERR "Failed to allocate DS9490R USB<->W1 bus_master structure.\n");
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return -ENOMEM;
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}
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ds_dev = ds_get_device();
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if (!ds_dev) {
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printk(KERN_ERR "DS9490R is not registered.\n");
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err = -ENODEV;
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goto err_out_free_bus_master;
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}
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memset(ds_bus_master, 0, sizeof(*ds_bus_master));
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ds_bus_master->data = (unsigned long)ds_dev;
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ds_bus_master->touch_bit = &ds9490r_touch_bit;
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ds_bus_master->read_bit = &ds9490r_read_bit;
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ds_bus_master->write_bit = &ds9490r_write_bit;
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ds_bus_master->read_byte = &ds9490r_read_byte;
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ds_bus_master->write_byte = &ds9490r_write_byte;
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ds_bus_master->read_block = &ds9490r_read_block;
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ds_bus_master->write_block = &ds9490r_write_block;
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ds_bus_master->reset_bus = &ds9490r_reset;
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err = w1_add_master_device(ds_bus_master);
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if (err)
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goto err_out_put_device;
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return 0;
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err_out_put_device:
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ds_put_device(ds_dev);
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err_out_free_bus_master:
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kfree(ds_bus_master);
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return err;
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}
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static void __devexit ds_w1_fini(void)
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{
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w1_remove_master_device(ds_bus_master);
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ds_put_device(ds_dev);
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kfree(ds_bus_master);
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}
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module_init(ds_w1_init);
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module_exit(ds_w1_fini);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
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