1 /***************************************************************************
3 Real time clock control functions .
4 These functions rely on the SPI module for communication.
6 begin : Tue Oct 14 2003
7 email : ngustavson@emacinc.com
8 ***************************************************************************/
10 /***************************************************************************
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 ***************************************************************************/
20 #include <asm/coldfire.h>
21 #include <asm/mcf_qspi.h>
22 #include <linux/rtc.h>
25 #define WRITE_OFFSET 0x80
26 enum registers
{ SEC
,MIN
,HOURS
,DAY
,DATE
,MONTH
,YEAR
,
27 SEC_ALARM0
,MIN_ALARM0
,HOUR_ALARM0
,DAY_ALARM0
, //alarm0
28 SEC_ALARM1
,MIN_ALARM1
,HOUR_ALARM1
,DAY_ALARM1
, //alarm1
29 CONTROL
,STATUS
,TRICKLE_CHARGER
};
32 #define DSNAME "ds1305rtc"
33 #define DS_DRIVER_V "1.0"
46 #define DDQS *(volatile u8 *)(MCF_MBAR + 0x100021)
47 #define SETQS *(volatile u8 *)(MCF_MBAR + 0x100035)
48 #define CLEARQS *(volatile u8 *)(MCF_MBAR + 0x100049)
50 #define RTC_CS_MASK 0x40
51 #define RTC_CE_SETUP() DDQS|=RTC_CS_MASK
52 #define RTC_CE_ON() qspi_mutex_down();SETQS=RTC_CS_MASK;
53 #define RTC_CE_OFF() CLEARQS=~RTC_CS_MASK;qspi_mutex_up();
56 typedef struct rtc_qspi_device
{
62 #define TIME2RTC(data) (((data/10)<<4)+(data%10))
63 #define RTC2TIME(data) (((data>>4)*10)+(data&0x0f))
65 #define RTC_SECONDS(dev) RTC_Read_Register(dev,SEC)
66 #define RTC_MINUTES(dev) RTC_Read_Register(dev,MIN)
67 #define RTC_HOURS(dev) RTC_Read_Register(dev,HOURS)
68 #define RTC_DAY(dev) RTC_Read_Register(dev,DAY)
69 #define RTC_DATE(dev) RTC_Read_Register(dev,DATE)
70 #define RTC_MONTH(dev) RTC_Read_Register(dev,MONTH)
71 #define RTC_YEAR(dev) RTC_Read_Register(dev,YEAR)
74 #define RTC_SET_SECONDS(dev,data) RTC_Write_Register(dev,SEC,TIME2RTC(data))
75 #define RTC_SET_MINUTES(dev,data) RTC_Write_Register(dev,MIN,TIME2RTC(data))
76 #define RTC_SET_HOURS(dev,data) RTC_Write_Register(dev,HOURS,TIME2RTC(data))
77 #define RTC_SET_DAY(dev,data) RTC_Write_Register(dev,DAY,TIME2RTC(data))
78 #define RTC_SET_DATE(dev,data) RTC_Write_Register(dev,DATE,TIME2RTC(data))
79 #define RTC_SET_MONTH(dev,data) RTC_Write_Register(dev,MONTH,TIME2RTC(data))
80 #define RTC_SET_YEAR(dev,data) RTC_Write_Register(dev,YEAR,TIME2RTC(data))
82 #endif /*DS1305RTC_H*/