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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* Copyright (c) 2005 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Neither the name of the Advanced Micro Devices, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
* */
/*
* This file contains routines to write to and read from the I2C bus.
* */
/* INCLUDE ROUTINES FOR ACCESS.BUS, IF SPECIFIED */
/* This is for SC1200 systems. */
#if GFX_I2C_ACCESS
#include "i2c_acc.c"
#endif
/* INCLUDE ROUTINES FOR CS5530 GPIOs, IF SPECIFIED */
/* This is for GXLV systems that use GPIOs on the CS5530 for I2C. */
#if GFX_I2C_GPIO
#include "i2c_gpio.c"
#endif
/* WRAPPERS IF DYNAMIC SELECTION */
/* Extra layer to call either ACCESS.bus or GPIO routines. */
#if GFX_I2C_DYNAMIC
/*---------------------------------------------------------------------------
* gfx_i2c_reset
*---------------------------------------------------------------------------
*/
int
gfx_i2c_reset(unsigned char busnum, short adr, char freq)
{
int status = GFX_STATUS_UNSUPPORTED;
#if GFX_I2C_ACCESS
if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS)
status = acc_i2c_reset(busnum, adr, freq);
#endif
#if GFX_I2C_GPIO
if (gfx_i2c_type & GFX_I2C_TYPE_GPIO)
status = gpio_i2c_reset(busnum, adr, freq);
#endif
return (status);
}
/*---------------------------------------------------------------------------
* gfx_i2c_select_gpio
*---------------------------------------------------------------------------
*/
int
gfx_i2c_select_gpio(int clock, int data)
{
#if GFX_I2C_ACCESS
if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS)
acc_i2c_select_gpio(clock, data);
#endif
#if GFX_I2C_GPIO
if (gfx_i2c_type & GFX_I2C_TYPE_GPIO)
gpio_i2c_select_gpio(clock, data);
#endif
return (0);
}
/*---------------------------------------------------------------------------
* gfx_i2c_write
*---------------------------------------------------------------------------
*/
int
gfx_i2c_write(unsigned char busnum, unsigned char chipadr,
unsigned char subadr, unsigned char bytes, unsigned char *data)
{
int status = -1;
#if GFX_I2C_ACCESS
if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS)
status = acc_i2c_write(busnum, chipadr, subadr, bytes, data);
#endif
#if GFX_I2C_GPIO
if (gfx_i2c_type & GFX_I2C_TYPE_GPIO)
status = gpio_i2c_write(busnum, chipadr, subadr, bytes, data);
#endif
return (status);
}
/*---------------------------------------------------------------------------
* gfx_i2c_read
*---------------------------------------------------------------------------
*/
int
gfx_i2c_read(unsigned char busnum, unsigned char chipadr,
unsigned char subadr, unsigned char bytes, unsigned char *data)
{
int status = -1;
#if GFX_I2C_ACCESS
if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS)
status = acc_i2c_read(busnum, chipadr, subadr, bytes, data);
#endif
#if GFX_I2C_GPIO
if (gfx_i2c_type & GFX_I2C_TYPE_GPIO)
status = gpio_i2c_read(busnum, chipadr, subadr, bytes, data);
#endif
return (status);
}
/*---------------------------------------------------------------------------
* gfx_i2c_init
*---------------------------------------------------------------------------
*/
int
gfx_i2c_init(void)
{
int status = -1;
#if GFX_I2C_ACCESS
if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS)
status = acc_i2c_init();
#endif
#if GFX_I2C_GPIO
if (gfx_i2c_type & GFX_I2C_TYPE_GPIO)
status = gpio_i2c_init();
#endif
return (status);
}
/*---------------------------------------------------------------------------
* gfx_i2c_cleanup
*---------------------------------------------------------------------------
*/
void
gfx_i2c_cleanup(void)
{
#if GFX_I2C_ACCESS
if (gfx_i2c_type & GFX_I2C_TYPE_ACCESS)
acc_i2c_cleanup();
#endif
#if GFX_I2C_GPIO
if (gfx_i2c_type & GFX_I2C_TYPE_GPIO)
gpio_i2c_cleanup();
#endif
}
#endif /* GFX_I2C_DYNAMIC */
/* END OF FILE */
|
