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)
46 /* Module interface map structure */
49 volatile uint16_t iadr
; /* 0x00 */
50 volatile uint16_t unused1
;
51 volatile uint16_t ifdr
; /* 0x04 */
52 volatile uint16_t unused2
;
53 volatile uint16_t i2cr
; /* 0x08 */
54 volatile uint16_t unused3
;
55 volatile uint16_t i2sr
; /* 0x0C */
56 volatile uint16_t unused4
;
57 volatile uint16_t i2dr
; /* 0x10 */
62 enum i2c_module_number num
; /* Module that this node uses */
63 unsigned int ifdr
; /* Maximum frequency for node */
64 unsigned char addr
; /* Slave address on module */
68 /* Enable or disable the node - modules will be switch on/off accordingly. */
69 void i2c_enable_node(struct i2c_node
*node
, bool enable
);
70 /* If addr < 0, then raw read */
71 int i2c_read(struct i2c_node
*node
, int addr
, unsigned char *data
, int count
);
72 int i2c_write(struct i2c_node
*node
, const unsigned char *data
, int count
);
73 /* Gain mutually-exclusive access to the node and module to perform multiple
74 * operations atomically */
75 void i2c_lock_node(struct i2c_node
*node
);
76 void i2c_unlock_node(struct i2c_node
*node
);
78 #endif /* I2C_IMX31_H */