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/*
* Allwinner Real Time Clock emulation
*
* Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef HW_MISC_ALLWINNER_RTC_H
#define HW_MISC_ALLWINNER_RTC_H
#include "qom/object.h"
#include "hw/sysbus.h"
/**
* Constants
* @{
*/
/** Highest register address used by RTC device */
#define AW_RTC_REGS_MAXADDR (0x200)
/** Total number of known registers */
#define AW_RTC_REGS_NUM (AW_RTC_REGS_MAXADDR / sizeof(uint32_t))
/** @} */
/**
* Object model types
* @{
*/
/** Generic Allwinner RTC device (abstract) */
#define TYPE_AW_RTC "allwinner-rtc"
/** Allwinner RTC sun4i family (A10, A12) */
#define TYPE_AW_RTC_SUN4I TYPE_AW_RTC "-sun4i"
/** Allwinner RTC sun6i family and newer (A31, H2+, H3, etc) */
#define TYPE_AW_RTC_SUN6I TYPE_AW_RTC "-sun6i"
/** Allwinner RTC sun7i family (A20) */
#define TYPE_AW_RTC_SUN7I TYPE_AW_RTC "-sun7i"
/** @} */
/**
* Object model macros
* @{
*/
OBJECT_DECLARE_TYPE(AwRtcState, AwRtcClass, AW_RTC)
/** @} */
/**
* Allwinner RTC per-object instance state.
*/
struct AwRtcState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
/**
* Actual year represented by the device when year counter is zero
*
* Can be overridden by the user using the corresponding 'base-year'
* property. The base year used by the target OS driver can vary, for
* example the Linux driver for sun6i uses 1970 while NetBSD uses 2000.
*/
int base_year;
/** Maps I/O registers in physical memory */
MemoryRegion iomem;
/** Array of hardware registers */
uint32_t regs[AW_RTC_REGS_NUM];
};
/**
* Allwinner RTC class-level struct.
*
* This struct is filled by each sunxi device specific code
* such that the generic code can use this struct to support
* all devices.
*/
struct AwRtcClass {
/*< private >*/
SysBusDeviceClass parent_class;
/*< public >*/
/** Defines device specific register map */
const uint8_t *regmap;
/** Size of the regmap in bytes */
size_t regmap_size;
/**
* Read device specific register
*
* @offset: register offset to read
* @return true if register read successful, false otherwise
*/
bool (*read)(AwRtcState *s, uint32_t offset);
/**
* Write device specific register
*
* @offset: register offset to write
* @data: value to set in register
* @return true if register write successful, false otherwise
*/
bool (*write)(AwRtcState *s, uint32_t offset, uint32_t data);
};
#endif /* HW_MISC_ALLWINNER_RTC_H */
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