todc.h

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/*
 * include/asm-ppc/todc.h
 *
 * Definitions for the M48Txx and mc146818 series of Time of day/Real Time
 * Clock chips.
 *
 * Author: Mark A. Greer
 *         [e-mail]
 *
 * 2001 (c) MontaVista, Software, Inc.  This file is licensed under
 * the terms of the GNU General Public License version 2.  This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

/*
 * Support for the M48T37/M48T59/.../mc146818 Real Time Clock chips.
 * Purpose is to make one generic file that handles all of these chips instead
 * of every platform implementing the same code over & over again.
 */

#ifndef __PPC_KERNEL_TODC_H
#define __PPC_KERNEL_TODC_H

typedef struct {
	uint rtc_type;		/* your particular chip */

	/*
	 * Following are the addresses of the AS0, AS1, and DATA registers
	 * of these chips.  Note that these are board-specific.
	 */
	unsigned int nvram_as0;
	unsigned int nvram_as1;
	unsigned int nvram_data;

	/*
	 * Define bits to stop external set of regs from changing so
	 * the chip can be read/written reliably.
	 */
	unsigned char enable_read;
	unsigned char enable_write;

	/*
	 * Following is the number of AS0 address bits.  This is normally
	 * 8 but some bad hardware routes address lines incorrectly.
	 */
	int as0_bits;

	int nvram_size;	/* Size of NVRAM on chip */
	int sw_flags;	/* Software control flags */

	/* Following are the register offsets for the particular chip */
	int year;
	int month;
	int day_of_month;
	int day_of_week;
	int hours;
	int minutes;
	int seconds;
	int control_b;
	int control_a;
	int watchdog;
	int interrupts;
	int alarm_date;
	int alarm_hour;
	int alarm_minutes;
	int alarm_seconds;
	int century;
	int flags;

	/*
	 * Some RTC chips have their NVRAM buried behind a addr/data pair of
	 * regs on the first level/clock registers.  The following fields
	 * are the addresses for those addr/data regs.
	 */
	int nvram_addr_reg;
	int nvram_data_reg;
} todc_info_t;

/*
 * Define the types of TODC/RTC variants that are supported in
 * arch/ppc/kernel/todc_time.c
 * Make a new one of these for any chip somehow differs from what's already
 * defined.  That way, if you ever need to put in code to touch those
 * bits/registers in todc_time.c, you can put it inside an
 * 'if (todc_info->rtc_type ==  TODC_TYPE_XXX)' so you won't break
 * anyone else.
 */
#define	TODC_TYPE_MK48T35		1
#define	TODC_TYPE_MK48T37		2
#define	TODC_TYPE_MK48T59		3
#define	TODC_TYPE_DS1693		4	/* Dallas DS1693 RTC */
#define	TODC_TYPE_DS1743		5	/* Dallas DS1743 RTC */
#define	TODC_TYPE_DS1746		6	/* Dallas DS1746 RTC */
#define	TODC_TYPE_DS1747		7	/* Dallas DS1747 RTC */
#define	TODC_TYPE_DS1501		8	/* Dallas DS1501 RTC */
#define TODC_TYPE_DS1643		9	/* Dallas DS1643 RTC */
#define TODC_TYPE_PC97307		10	/* PC97307 internal RTC */
#define TODC_TYPE_DS1557		11	/* Dallas DS1557 RTC */
#define TODC_TYPE_DS17285		12	/* Dallas DS17285 RTC */
#define	TODC_TYPE_MC146818		100	/* Leave room for m48txx's */

/*
 * Bit to clear/set to enable reads/writes to the chip
 */
#define	TODC_MK48TXX_CNTL_A_R		0x40
#define	TODC_MK48TXX_CNTL_A_W		0x80
#define	TODC_MK48TXX_DAY_CB		0x80

#define	TODC_DS1501_CNTL_B_TE		0x80

/*
 * Define flag bits used by todc routines.
 */
#define	TODC_FLAG_2_LEVEL_NVRAM		0x00000001

/*
 * Define the values for the various RTC's that should to into the todc_info
 * table.
 * Note: The XXX_NVRAM_SIZE, XXX_NVRAM_ADDR_REG, and XXX_NVRAM_DATA_REG only
 * matter if XXX_SW_FLAGS has TODC_FLAG_2_LEVEL_NVRAM set.
 */
#define	TODC_TYPE_MK48T35_NVRAM_SIZE		0x7ff8
#define	TODC_TYPE_MK48T35_SW_FLAGS		0
#define	TODC_TYPE_MK48T35_YEAR			0x7fff
#define	TODC_TYPE_MK48T35_MONTH			0x7ffe
#define	TODC_TYPE_MK48T35_DOM			0x7ffd	/* Day of Month */
#define	TODC_TYPE_MK48T35_DOW			0x7ffc	/* Day of Week */
#define	TODC_TYPE_MK48T35_HOURS			0x7ffb
#define	TODC_TYPE_MK48T35_MINUTES		0x7ffa
#define	TODC_TYPE_MK48T35_SECONDS		0x7ff9
#define	TODC_TYPE_MK48T35_CNTL_B		0x7ff9
#define	TODC_TYPE_MK48T35_CNTL_A		0x7ff8
#define	TODC_TYPE_MK48T35_WATCHDOG		0x0000
#define	TODC_TYPE_MK48T35_INTERRUPTS		0x0000
#define	TODC_TYPE_MK48T35_ALARM_DATE		0x0000
#define	TODC_TYPE_MK48T35_ALARM_HOUR		0x0000
#define	TODC_TYPE_MK48T35_ALARM_MINUTES		0x0000
#define	TODC_TYPE_MK48T35_ALARM_SECONDS		0x0000
#define	TODC_TYPE_MK48T35_CENTURY		0x0000
#define	TODC_TYPE_MK48T35_FLAGS			0x0000
#define	TODC_TYPE_MK48T35_NVRAM_ADDR_REG	0
#define	TODC_TYPE_MK48T35_NVRAM_DATA_REG	0

#define	TODC_TYPE_MK48T37_NVRAM_SIZE		0x7ff0
#define	TODC_TYPE_MK48T37_SW_FLAGS		0
#define	TODC_TYPE_MK48T37_YEAR			0x7fff
#define	TODC_TYPE_MK48T37_MONTH			0x7ffe
#define	TODC_TYPE_MK48T37_DOM			0x7ffd	/* Day of Month */
#define	TODC_TYPE_MK48T37_DOW			0x7ffc	/* Day of Week */
#define	TODC_TYPE_MK48T37_HOURS			0x7ffb
#define	TODC_TYPE_MK48T37_MINUTES		0x7ffa
#define	TODC_TYPE_MK48T37_SECONDS		0x7ff9
#define	TODC_TYPE_MK48T37_CNTL_B		0x7ff9
#define	TODC_TYPE_MK48T37_CNTL_A		0x7ff8
#define	TODC_TYPE_MK48T37_WATCHDOG		0x7ff7
#define	TODC_TYPE_MK48T37_INTERRUPTS		0x7ff6
#define	TODC_TYPE_MK48T37_ALARM_DATE		0x7ff5
#define	TODC_TYPE_MK48T37_ALARM_HOUR		0x7ff4
#define	TODC_TYPE_MK48T37_ALARM_MINUTES		0x7ff3
#define	TODC_TYPE_MK48T37_ALARM_SECONDS		0x7ff2
#define	TODC_TYPE_MK48T37_CENTURY		0x7ff1
#define	TODC_TYPE_MK48T37_FLAGS			0x7ff0
#define	TODC_TYPE_MK48T37_NVRAM_ADDR_REG	0
#define	TODC_TYPE_MK48T37_NVRAM_DATA_REG	0

#define	TODC_TYPE_MK48T59_NVRAM_SIZE		0x1ff0
#define	TODC_TYPE_MK48T59_SW_FLAGS		0
#define	TODC_TYPE_MK48T59_YEAR			0x1fff
#define	TODC_TYPE_MK48T59_MONTH			0x1ffe
#define	TODC_TYPE_MK48T59_DOM			0x1ffd	/* Day of Month */
#define	TODC_TYPE_MK48T59_DOW			0x1ffc	/* Day of Week */
#define	TODC_TYPE_MK48T59_HOURS			0x1ffb
#define	TODC_TYPE_MK48T59_MINUTES		0x1ffa
#define	TODC_TYPE_MK48T59_SECONDS		0x1ff9
#define	TODC_TYPE_MK48T59_CNTL_B		0x1ff9
#define	TODC_TYPE_MK48T59_CNTL_A		0x1ff8
#define	TODC_TYPE_MK48T59_WATCHDOG		0x1fff
#define	TODC_TYPE_MK48T59_INTERRUPTS		0x1fff
#define	TODC_TYPE_MK48T59_ALARM_DATE		0x1fff
#define	TODC_TYPE_MK48T59_ALARM_HOUR		0x1fff
#define	TODC_TYPE_MK48T59_ALARM_MINUTES		0x1fff
#define	TODC_TYPE_MK48T59_ALARM_SECONDS		0x1fff
#define	TODC_TYPE_MK48T59_CENTURY		0x1fff
#define	TODC_TYPE_MK48T59_FLAGS			0x1fff
#define	TODC_TYPE_MK48T59_NVRAM_ADDR_REG	0
#define	TODC_TYPE_MK48T59_NVRAM_DATA_REG	0

#define	TODC_TYPE_DS1501_NVRAM_SIZE	0x100
#define	TODC_TYPE_DS1501_SW_FLAGS	TODC_FLAG_2_LEVEL_NVRAM
#define	TODC_TYPE_DS1501_YEAR		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x06)
#define	TODC_TYPE_DS1501_MONTH		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x05)
#define	TODC_TYPE_DS1501_DOM		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x04)
#define	TODC_TYPE_DS1501_DOW		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x03)
#define	TODC_TYPE_DS1501_HOURS		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x02)
#define	TODC_TYPE_DS1501_MINUTES	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x01)
#define	TODC_TYPE_DS1501_SECONDS	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x00)
#define	TODC_TYPE_DS1501_CNTL_B		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0f)
#define	TODC_TYPE_DS1501_CNTL_A		(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0f)
#define	TODC_TYPE_DS1501_WATCHDOG	(TODC_TYPE_DS1501_NVRAM_SIZE + 0xff)
#define	TODC_TYPE_DS1501_INTERRUPTS	(TODC_TYPE_DS1501_NVRAM_SIZE + 0xff)
#define	TODC_TYPE_DS1501_ALARM_DATE	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0b)
#define	TODC_TYPE_DS1501_ALARM_HOUR	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x0a)
#define	TODC_TYPE_DS1501_ALARM_MINUTES	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x09)
#define	TODC_TYPE_DS1501_ALARM_SECONDS	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x08)
#define	TODC_TYPE_DS1501_CENTURY	(TODC_TYPE_DS1501_NVRAM_SIZE + 0x07)
#define	TODC_TYPE_DS1501_FLAGS		(TODC_TYPE_DS1501_NVRAM_SIZE + 0xff)
#define	TODC_TYPE_DS1501_NVRAM_ADDR_REG	0x10
#define	TODC_TYPE_DS1501_NVRAM_DATA_REG	0x13

#define	TODC_TYPE_DS1557_NVRAM_SIZE		0x7fff0
#define	TODC_TYPE_DS1557_SW_FLAGS		0
#define	TODC_TYPE_DS1557_YEAR			0x7ffff
#define	TODC_TYPE_DS1557_MONTH			0x7fffe
#define	TODC_TYPE_DS1557_DOM			0x7fffd	/* Day of Month */
#define	TODC_TYPE_DS1557_DOW			0x7fffc	/* Day of Week */
#define	TODC_TYPE_DS1557_HOURS			0x7fffb
#define	TODC_TYPE_DS1557_MINUTES		0x7fffa
#define	TODC_TYPE_DS1557_SECONDS		0x7fff9
#define	TODC_TYPE_DS1557_CNTL_B			0x7fff9
#define	TODC_TYPE_DS1557_CNTL_A			0x7fff8	/* control_a R/W regs */
#define	TODC_TYPE_DS1557_WATCHDOG		0x7fff7
#define	TODC_TYPE_DS1557_INTERRUPTS		0x7fff6
#define	TODC_TYPE_DS1557_ALARM_DATE		0x7fff5
#define	TODC_TYPE_DS1557_ALARM_HOUR		0x7fff4
#define	TODC_TYPE_DS1557_ALARM_MINUTES		0x7fff3
#define	TODC_TYPE_DS1557_ALARM_SECONDS		0x7fff2
#define	TODC_TYPE_DS1557_CENTURY		0x7fff8
#define	TODC_TYPE_DS1557_FLAGS			0x7fff0
#define	TODC_TYPE_DS1557_NVRAM_ADDR_REG		0
#define	TODC_TYPE_DS1557_NVRAM_DATA_REG		0

#define	TODC_TYPE_DS1643_NVRAM_SIZE		0x1ff8
#define	TODC_TYPE_DS1643_SW_FLAGS		0