1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2007 by Michael Sevakis
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
26 /* I2C module usage masks */
27 #define USE_I2C1_MODULE (1 << 0)
28 #define USE_I2C2_MODULE (1 << 1)
29 #define USE_I2C3_MODULE (1 << 2)
31 enum i2c_module_number
34 #if (I2C_MODULE_MASK & USE_I2C1_MODULE)
37 #if (I2C_MODULE_MASK & USE_I2C2_MODULE)
40 #if (I2C_MODULE_MASK & USE_I2C3_MODULE)
48 enum i2c_module_number num
; /* Module that this node uses */
49 unsigned int ifdr
; /* Maximum frequency for node */
50 unsigned char addr
; /* Slave address on module */
54 /* Enable or disable the node - modules will be switch on/off accordingly. */
55 void i2c_enable_node(struct i2c_node
*node
, bool enable
);
56 /* If addr < 0, then raw read */
57 int i2c_read(struct i2c_node
*node
, int addr
, unsigned char *data
, int count
);
58 int i2c_write(struct i2c_node
*node
, const unsigned char *data
, int count
);
59 /* Gain mutually-exclusive access to the node and module to perform multiple
60 * operations atomically */
61 void i2c_lock_node(struct i2c_node
*node
);
62 void i2c_unlock_node(struct i2c_node
*node
);
64 #endif /* I2C_IMX31_H */