1 //==========================================================================
5 // I2C support on Freescale MXC platforms
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
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37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
51 #define I2C_I2CR_IEN (1 << 7)
52 #define I2C_I2CR_IIEN (1 << 6)
53 #define I2C_I2CR_MSTA (1 << 5)
54 #define I2C_I2CR_MTX (1 << 4)
55 #define I2C_I2CR_TXAK (1 << 3)
56 #define I2C_I2CR_RSTA (1 << 2)
58 #define I2C_I2SR_ICF (1 << 7)
59 #define I2C_I2SR_IAAS (1 << 6)
60 #define I2C_I2SR_IBB (1 << 5)
61 #define I2C_I2SR_IAL (1 << 4)
62 #define I2C_I2SR_SRW (1 << 2)
63 #define I2C_I2SR_IIF (1 << 1)
64 #define I2C_I2SR_RXAK (1 << 0)
69 struct mxc_i2c_request {
70 unsigned int dev_addr;
71 unsigned int reg_addr;
72 unsigned int reg_addr_sz;
73 unsigned char * buffer;
74 unsigned int buffer_sz;
77 extern unsigned int i2c_base_addr[];
78 extern unsigned int i2c_num;
80 extern int i2c_init(unsigned int base, unsigned int baud);
81 extern int i2c_xfer(unsigned int i2c_nr, struct mxc_i2c_request *rq, int dir);
83 #endif /* __MXC_I2C_H__ */