1/* SPDX-License-Identifier: GPL-2.0+ */
 2/*
 3 * i2c-algo-bit.h: i2c driver algorithms for bit-shift adapters
 4 *
 5 *   Copyright (C) 1995-99 Simon G. Vogl
 6 * With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
 7 * Frodo Looijaard <frodol@dds.nl>
 8 */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 9
10#ifndef _LINUX_I2C_ALGO_BIT_H
11#define _LINUX_I2C_ALGO_BIT_H
12
13#include <linux/i2c.h>
14
15/* --- Defines for bit-adapters ---------------------------------------	*/
16/*
17 * This struct contains the hw-dependent functions of bit-style adapters to
18 * manipulate the line states, and to init any hw-specific features. This is
19 * only used if you have more than one hw-type of adapter running.
20 */
21struct i2c_algo_bit_data {
22	void *data;		/* private data for lowlevel routines */
23	void (*setsda) (void *data, int state);
24	void (*setscl) (void *data, int state);
25	int  (*getsda) (void *data);
26	int  (*getscl) (void *data);
27	int  (*pre_xfer)  (struct i2c_adapter *);
28	void (*post_xfer) (struct i2c_adapter *);
29
30	/* local settings */
31	int udelay;		/* half clock cycle time in us,
32				   minimum 2 us for fast-mode I2C,
33				   minimum 5 us for standard-mode I2C and SMBus,
34				   maximum 50 us for SMBus */
35	int timeout;		/* in jiffies */
36	bool can_do_atomic;	/* callbacks don't sleep, we can be atomic */
37};
38
39int i2c_bit_add_bus(struct i2c_adapter *);
40int i2c_bit_add_numbered_bus(struct i2c_adapter *);
41extern const struct i2c_algorithm i2c_bit_algo;
42
43#endif /* _LINUX_I2C_ALGO_BIT_H */

 1/* ------------------------------------------------------------------------- */
 2/* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters               */
 3/* ------------------------------------------------------------------------- */
 4/*   Copyright (C) 1995-99 Simon G. Vogl
 5
 6    This program is free software; you can redistribute it and/or modify
 7    it under the terms of the GNU General Public License as published by
 8    the Free Software Foundation; either version 2 of the License, or
 9    (at your option) any later version.
10
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19    MA 02110-1301 USA.							     */
20/* ------------------------------------------------------------------------- */
21
22/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
23   Frodo Looijaard <frodol@dds.nl> */
24
25#ifndef _LINUX_I2C_ALGO_BIT_H
26#define _LINUX_I2C_ALGO_BIT_H
27
 
 
28/* --- Defines for bit-adapters ---------------------------------------	*/
29/*
30 * This struct contains the hw-dependent functions of bit-style adapters to
31 * manipulate the line states, and to init any hw-specific features. This is
32 * only used if you have more than one hw-type of adapter running.
33 */
34struct i2c_algo_bit_data {
35	void *data;		/* private data for lowlevel routines */
36	void (*setsda) (void *data, int state);
37	void (*setscl) (void *data, int state);
38	int  (*getsda) (void *data);
39	int  (*getscl) (void *data);
40	int  (*pre_xfer)  (struct i2c_adapter *);
41	void (*post_xfer) (struct i2c_adapter *);
42
43	/* local settings */
44	int udelay;		/* half clock cycle time in us,
45				   minimum 2 us for fast-mode I2C,
46				   minimum 5 us for standard-mode I2C and SMBus,
47				   maximum 50 us for SMBus */
48	int timeout;		/* in jiffies */
 
49};
50
51int i2c_bit_add_bus(struct i2c_adapter *);
52int i2c_bit_add_numbered_bus(struct i2c_adapter *);
53extern const struct i2c_algorithm i2c_bit_algo;
54
55#endif /* _LINUX_I2C_ALGO_BIT_H */