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
|
/*===============================================================*\
| Project: RTEMS generic MPC5200 BSP |
+-----------------------------------------------------------------+
| Partially based on the code references which are named below. |
| Adaptions, modifications, enhancements and any recent parts of |
| the code are: |
| Copyright (c) 2005 |
| Embedded Brains GmbH |
| Obere Lagerstr. 30 |
| D-82178 Puchheim |
| Germany |
| rtems@embedded-brains.de |
+-----------------------------------------------------------------+
| The license and distribution terms for this file may be |
| found in the file LICENSE in this distribution or at |
| |
| http://www.rtems.org/license/LICENSE. |
| |
+-----------------------------------------------------------------+
| this file configures the pcf8563 RTC for a PM520 board |
\*===============================================================*/
/*
* This file contains the RTC driver table for Motorola MCF5206eLITE
* ColdFire evaluation board.
*
* Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
* Author: Victor V. Vengerov <vvv@oktet.ru>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/i2c.h>
#include <libchip/rtc.h>
#include "pcf8563.h"
/* Forward function declaration */
bool mpc5200_pcf8563_probe(int minor);
extern rtc_fns pcf8563_fns;
/* The following table configures the RTC drivers used in this BSP */
rtc_tbl RTC_Table[] = {
{
"/dev/rtc", /* sDeviceName */
RTC_CUSTOM, /* deviceType */
&pcf8563_fns, /* pDeviceFns */
mpc5200_pcf8563_probe, /* deviceProbe */
NULL, /* pDeviceParams */
0x01, /* ulCtrlPort1, for PCF8563-I2C bus number */
PCF8563_I2C_ADDRESS, /* ulDataPort, for PCF8563-I2C device addr */
NULL, /* getRegister - not applicable to PCF8563 */
NULL /* setRegister - not applicable to PCF8563 */
}
};
/* Some information used by the RTC driver */
#define NUM_RTCS (sizeof(RTC_Table)/sizeof(rtc_tbl))
size_t RTC_Count = NUM_RTCS;
/* mpc5200_pcf8563_probe --
* RTC presence probe function. Return TRUE, if device is present.
* Device presence checked by probe access to RTC device over I2C bus.
*
* PARAMETERS:
* minor - minor RTC device number
*
* RETURNS:
* TRUE, if RTC device is present
*/
bool
mpc5200_pcf8563_probe(int minor)
{
int try = 0;
i2c_message_status status;
rtc_tbl *rtc;
i2c_bus_number bus;
i2c_address addr;
if (minor >= NUM_RTCS)
return false;
rtc = RTC_Table + minor;
bus = rtc->ulCtrlPort1;
addr = rtc->ulDataPort;
do {
status = i2c_wrbyte(bus, addr, 0);
if (status == I2C_NO_DEVICE)
return false;
try++;
} while ((try < 15) && (status != I2C_SUCCESSFUL));
if (status == I2C_SUCCESSFUL)
return true;
else
return false;
}
|