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
|
/* SPDX-License-Identifier: BSD-2-Clause */
/*
* RTEMS support for MPC83xx
*
* This file contains the low level MPC83xx I2C driver parameters.
*/
/*
* Copyright (c) 2007 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <mpc83xx/mpc83xx_i2cdrv.h>
#include <libchip/i2c-2b-eeprom.h>
#include <libchip/i2c-sc620.h>
#include <bsp/irq.h>
#include <bsp.h>
static void i2c1_probe(mpc83xx_i2c_softc_t *self)
{
#if MPC83XX_CHIP_TYPE != 8309
if (((mpc83xx.clk.sccr >> (31-1)) & 0x03) > 0) {
self->base_frq =
(BSP_bus_frequency
/((mpc83xx.clk.sccr >> (31-1)) & 0x03));
}
#else /* MPC83XX_CHIP_TYPE != 8309 */
self->base_frq = BSP_bus_frequency;
#endif /* MPC83XX_CHIP_TYPE != 8309 */
}
#ifndef MPC83XX_BOARD_BR_UID
static void i2c2_probe(mpc83xx_i2c_softc_t *self)
{
self->base_frq = BSP_bus_frequency;
}
#endif /* MPC83XX_BOARD_BR_UID */
static mpc83xx_i2c_desc_t mpc83xx_i2c_bus_tbl[] = {
/* first channel */
{
{/* public fields */
.ops = &mpc83xx_i2c_ops,
.size = sizeof(mpc83xx_i2c_bus_tbl[0]),
},
{ /* our private fields */
.reg_ptr = &mpc83xx.i2c[0],
.initialized = FALSE,
.irq_number = BSP_IPIC_IRQ_I2C1,
.base_frq = 0, /* will be set during probe */
.probe = i2c1_probe
}
}
#ifndef MPC83XX_BOARD_BR_UID
/* second channel */
, {
{ /* public fields */
.ops = &mpc83xx_i2c_ops,
.size = sizeof(mpc83xx_i2c_bus_tbl[0]),
},
{ /* our private fields */
.reg_ptr = &mpc83xx.i2c[1],
.initialized = FALSE,
.irq_number = BSP_IPIC_IRQ_I2C2,
.base_frq = 0, /* will be set during probe */
.probe = i2c2_probe
}
}
#endif /* MPC83XX_BOARD_BR_UID */
};
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code bsp_register_i2c
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| register I2C busses and devices |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
void /* <none> */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| 0 or error code |
\*=========================================================================*/
{
char device_path[] = "/dev/i2c?";
size_t n = RTEMS_ARRAY_SIZE(mpc83xx_i2c_bus_tbl);
size_t i;
int i2c_busno[n];
/*
* init I2C library (if not already done)
*/
rtems_libi2c_initialize ();
/*
* init I2C buses
*/
for (i = 0; i < n; ++i) {
mpc83xx_i2c_desc_t *desc = &mpc83xx_i2c_bus_tbl[i];
(*desc->softc.probe)(&desc->softc);
device_path[sizeof(device_path) - 2] = (char) ('1' + i);
i2c_busno[i] = rtems_libi2c_register_bus(device_path, &desc->bus_desc);
}
#if defined(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME)
if (n > 0) {
/*
* register EEPROM to bus 1, Address 0x50
*/
rtems_libi2c_register_drv(RTEMS_BSP_I2C_EEPROM_DEVICE_NAME,
i2c_2b_eeprom_driver_descriptor,
i2c_busno[0],0x50);
}
#elif defined(MPC83XX_BOARD_BR_UID)
if (n > 0) {
rtems_libi2c_register_drv(
"sc620",
&i2c_sc620_driver,
i2c_busno[0],
0x70
);
}
#else
/*
* We have no i2c configuration for this variant but need to mark
* i2c_busno as used.
*/
(void) i2c_busno[0]; /* avoid set but not used warning */
#endif
/*
* FIXME: register RTC driver, when available
*/
return RTEMS_SUCCESSFUL;
}
|
