1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
//==========================================================================
//
// devs/i2c/m68k/mcf52xx/current/src/i2c_mcf52xx.h
//
// I2C driver for Motorola coldfire processors
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2005, 2006 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): Bart Veer
// Contributors:
// Date: 2005-11-20
// Description: I2C driver for motorola coldfire processor
//####DESCRIPTIONEND####
//==========================================================================
#include <pkgconf/devs_i2c_mcf52xx.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/hal/drv_api.h>
typedef enum cyg_mcf52xx_i2c_xfer_mode {
CYG_MCF52xx_I2C_XFER_MODE_INVALID = 0x00,
CYG_MCF52xx_I2C_XFER_MODE_TX = 0x01,
CYG_MCF52xx_I2C_XFER_MODE_RX = 0x02,
CYG_MCF52xx_I2C_XFER_MODE_STARTRX = 0x03
} cyg_mcf52xx_i2c_xfer_mode;
typedef struct cyg_mcf52xx_i2c_extra {
#ifdef CYGHWR_DEVS_I2C_MCF52xx_MULTIPLE_BUSES
// Put statically initialized fields first.
cyg_uint8* i2c_base; // Per-bus h/w details
cyg_vector_t i2c_isrvec;
int i2c_isrpri;
int i2c_fdr;
#endif
cyg_uint8 i2c_owner; // We have bus ownership
cyg_uint8 i2c_lost_arb; // Error condition leading to loss of bus ownership
cyg_uint8 i2c_send_nack; // As per rx send_nack argument
cyg_uint8 i2c_got_nack; // The last tx resulted in a nack
cyg_uint8 i2c_completed; // Set by DSR, checked by thread
union {
const cyg_uint8* i2c_tx_data;
cyg_uint8* i2c_rx_data;
} i2c_data; // The current buffer for rx or tx
cyg_uint32 i2c_count; // Number of bytes left in buffer
cyg_mcf52xx_i2c_xfer_mode i2c_mode; // TX, RX, ...
cyg_drv_mutex_t i2c_lock; // For synchronizing between DSR and foreground
cyg_drv_cond_t i2c_wait;
cyg_handle_t i2c_interrupt_handle; // For initializing the interrupt
cyg_interrupt i2c_interrupt_data;
} cyg_mcf52xx_i2c_extra;
externC void cyg_mcf52xx_i2c_init(struct cyg_i2c_bus*);
externC cyg_uint32 cyg_mcf52xx_i2c_tx(const cyg_i2c_device*, cyg_bool, const cyg_uint8*, cyg_uint32, cyg_bool);
externC cyg_uint32 cyg_mcf52xx_i2c_rx(const cyg_i2c_device*, cyg_bool, cyg_uint8*, cyg_uint32, cyg_bool, cyg_bool);
externC void cyg_mcf52xx_i2c_stop(const cyg_i2c_device*);
#ifdef CYGHWR_DEVS_I2C_MCF52xx_MULTIPLE_BUSES
# define CYG_MCF52xx_I2C_BUS(_name_, _init_fn_, _base_, _isr_vec_, _isr_pri_, _fdr_) \
static cyg_mcf52xx_i2c_extra _name_ ## _extra = { \
_base_, \
_isr_vec_, \
_isr_pri_, \
_fdr_ \
} ; \
CYG_I2C_BUS(_name_, \
_init_fn_, \
&cyg_mcf52xx_i2c_tx, \
&cyg_mcf52xx_i2c_rx, \
&cyg_mcf52xx_i2c_stop, \
(void*) & ( _name_ ## _extra)) ;
#else
# define CYG_MCF52xx_I2C_BUS(_name_, _init_fn_, _base_, _isr_vec_, _isr_pri_, _fdr_) \
static cyg_mcf52xx_i2c_extra _name_ ## _extra; \
CYG_I2C_BUS(_name_, \
_init_fn_, \
cyg_mcf52xx_i2c_tx, \
cyg_mcf52xx_i2c_rx, \
cyg_mcf52xx_i2c_stop, \
(void*) & ( _name_ ## _extra)) ;
#endif
|
