[qemu.git] / hw / rtc / allwinner-rtc.c

/*
 * Allwinner Real Time Clock emulation
 *
 * Copyright (C) 2019 Niek Linnenbank <[email protected]>
 *
 * 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/>.
 */

#include "qemu/osdep.h"
#include "qemu/units.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu-common.h"
#include "hw/qdev-properties.h"
#include "hw/rtc/allwinner-rtc.h"
#include "trace.h"

/* RTC registers */
enum {
    REG_LOSC = 1,        /* Low Oscillator Control */
    REG_YYMMDD,          /* RTC Year-Month-Day */
    REG_HHMMSS,          /* RTC Hour-Minute-Second */
    REG_ALARM1_WKHHMMSS, /* Alarm1 Week Hour-Minute-Second */
    REG_ALARM1_EN,       /* Alarm1 Enable */
    REG_ALARM1_IRQ_EN,   /* Alarm1 IRQ Enable */
    REG_ALARM1_IRQ_STA,  /* Alarm1 IRQ Status */
    REG_GP0,             /* General Purpose Register 0 */
    REG_GP1,             /* General Purpose Register 1 */
    REG_GP2,             /* General Purpose Register 2 */
    REG_GP3,             /* General Purpose Register 3 */

    /* sun4i registers */
    REG_ALARM1_DDHHMMSS, /* Alarm1 Day Hour-Minute-Second */
    REG_CPUCFG,          /* CPU Configuration Register */

    /* sun6i registers */
    REG_LOSC_AUTOSTA,    /* LOSC Auto Switch Status */
    REG_INT_OSC_PRE,     /* Internal OSC Clock Prescaler */
    REG_ALARM0_COUNTER,  /* Alarm0 Counter */
    REG_ALARM0_CUR_VLU,  /* Alarm0 Counter Current Value */
    REG_ALARM0_ENABLE,   /* Alarm0 Enable */
    REG_ALARM0_IRQ_EN,   /* Alarm0 IRQ Enable */
    REG_ALARM0_IRQ_STA,  /* Alarm0 IRQ Status */
    REG_ALARM_CONFIG,    /* Alarm Config */
    REG_LOSC_OUT_GATING, /* LOSC Output Gating Register */
    REG_GP4,             /* General Purpose Register 4 */
    REG_GP5,             /* General Purpose Register 5 */
    REG_GP6,             /* General Purpose Register 6 */
    REG_GP7,             /* General Purpose Register 7 */
    REG_RTC_DBG,         /* RTC Debug Register */
    REG_GPL_HOLD_OUT,    /* GPL Hold Output Register */
    REG_VDD_RTC,         /* VDD RTC Regulate Register */
    REG_IC_CHARA,        /* IC Characteristics Register */
};

/* RTC register flags */
enum {
    REG_LOSC_YMD   = (1 << 7),
    REG_LOSC_HMS   = (1 << 8),
};

/* RTC sun4i register map (offset to name) */
const uint8_t allwinner_rtc_sun4i_regmap[] = {
    [0x0000] = REG_LOSC,
    [0x0004] = REG_YYMMDD,
    [0x0008] = REG_HHMMSS,
    [0x000C] = REG_ALARM1_DDHHMMSS,
    [0x0010] = REG_ALARM1_WKHHMMSS,
    [0x0014] = REG_ALARM1_EN,
    [0x0018] = REG_ALARM1_IRQ_EN,
    [0x001C] = REG_ALARM1_IRQ_STA,
    [0x0020] = REG_GP0,
    [0x0024] = REG_GP1,
    [0x0028] = REG_GP2,
    [0x002C] = REG_GP3,
    [0x003C] = REG_CPUCFG,
};

/* RTC sun6i register map (offset to name) */
const uint8_t allwinner_rtc_sun6i_regmap[] = {
    [0x0000] = REG_LOSC,
    [0x0004] = REG_LOSC_AUTOSTA,
    [0x0008] = REG_INT_OSC_PRE,
    [0x0010] = REG_YYMMDD,
    [0x0014] = REG_HHMMSS,
    [0x0020] = REG_ALARM0_COUNTER,
    [0x0024] = REG_ALARM0_CUR_VLU,
    [0x0028] = REG_ALARM0_ENABLE,
    [0x002C] = REG_ALARM0_IRQ_EN,
    [0x0030] = REG_ALARM0_IRQ_STA,
    [0x0040] = REG_ALARM1_WKHHMMSS,
    [0x0044] = REG_ALARM1_EN,
    [0x0048] = REG_ALARM1_IRQ_EN,
    [0x004C] = REG_ALARM1_IRQ_STA,
    [0x0050] = REG_ALARM_CONFIG,
    [0x0060] = REG_LOSC_OUT_GATING,
    [0x0100] = REG_GP0,
    [0x0104] = REG_GP1,
    [0x0108] = REG_GP2,
    [0x010C] = REG_GP3,
    [0x0110] = REG_GP4,
    [0x0114] = REG_GP5,
    [0x0118] = REG_GP6,
    [0x011C] = REG_GP7,
    [0x0170] = REG_RTC_DBG,
    [0x0180] = REG_GPL_HOLD_OUT,
    [0x0190] = REG_VDD_RTC,
    [0x01F0] = REG_IC_CHARA,
};

static bool allwinner_rtc_sun4i_read(AwRtcState *s, uint32_t offset)
{
    /* no sun4i specific registers currently implemented */
    return false;
}

static bool allwinner_rtc_sun4i_write(AwRtcState *s, uint32_t offset,
                                      uint32_t data)
{
    /* no sun4i specific registers currently implemented */
    return false;
}

static bool allwinner_rtc_sun6i_read(AwRtcState *s, uint32_t offset)
{
    const AwRtcClass *c = AW_RTC_GET_CLASS(s);

    switch (c->regmap[offset]) {
    case REG_GP4:             /* General Purpose Register 4 */
    case REG_GP5:             /* General Purpose Register 5 */
    case REG_GP6:             /* General Purpose Register 6 */
    case REG_GP7:             /* General Purpose Register 7 */
        return true;
    default:
        break;
    }
    return false;
}

static bool allwinner_rtc_sun6i_write(AwRtcState *s, uint32_t offset,
                                      uint32_t data)
{
    const AwRtcClass *c = AW_RTC_GET_CLASS(s);

    switch (c->regmap[offset]) {
    case REG_GP4:             /* General Purpose Register 4 */
    case REG_GP5:             /* General Purpose Register 5 */
    case REG_GP6:             /* General Purpose Register 6 */
    case REG_GP7:             /* General Purpose Register 7 */
        return true;
    default:
        break;
    }
    return false;
}

static uint64_t allwinner_rtc_read(void *opaque, hwaddr offset,
                                   unsigned size)
{
    AwRtcState *s = AW_RTC(opaque);
    const AwRtcClass *c = AW_RTC_GET_CLASS(s);
    uint64_t val = 0;

    if (offset >= c->regmap_size) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
                      __func__, (uint32_t)offset);
        return 0;
    }

    if (!c->regmap[offset]) {
            qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register 0x%04x\n",
                          __func__, (uint32_t)offset);
        return 0;
    }

    switch (c->regmap[offset]) {
    case REG_LOSC:       /* Low Oscillator Control */
        val = s->regs[REG_LOSC];
        s->regs[REG_LOSC] &= ~(REG_LOSC_YMD | REG_LOSC_HMS);
        break;
    case REG_YYMMDD:     /* RTC Year-Month-Day */
    case REG_HHMMSS:     /* RTC Hour-Minute-Second */
    case REG_GP0:        /* General Purpose Register 0 */
    case REG_GP1:        /* General Purpose Register 1 */
    case REG_GP2:        /* General Purpose Register 2 */
    case REG_GP3:        /* General Purpose Register 3 */
        val = s->regs[c->regmap[offset]];
        break;
    default:
        if (!c->read(s, offset)) {
            qemu_log_mask(LOG_UNIMP, "%s: unimplemented register 0x%04x\n",
                          __func__, (uint32_t)offset);
        }
        val = s->regs[c->regmap[offset]];
        break;
    }

    trace_allwinner_rtc_read(offset, val);
    return val;
}

static void allwinner_rtc_write(void *opaque, hwaddr offset,
                                uint64_t val, unsigned size)
{
    AwRtcState *s = AW_RTC(opaque);
    const AwRtcClass *c = AW_RTC_GET_CLASS(s);

    if (offset >= c->regmap_size) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
                      __func__, (uint32_t)offset);
        return;
    }

    if (!c->regmap[offset]) {
            qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register 0x%04x\n",
                          __func__, (uint32_t)offset);
        return;
    }

    trace_allwinner_rtc_write(offset, val);

    switch (c->regmap[offset]) {
    case REG_YYMMDD:     /* RTC Year-Month-Day */
        s->regs[REG_YYMMDD] = val;
        s->regs[REG_LOSC]  |= REG_LOSC_YMD;
        break;
    case REG_HHMMSS:     /* RTC Hour-Minute-Second */
        s->regs[REG_HHMMSS] = val;
        s->regs[REG_LOSC]  |= REG_LOSC_HMS;
        break;
    case REG_GP0:        /* General Purpose Register 0 */
    case REG_GP1:        /* General Purpose Register 1 */
    case REG_GP2:        /* General Purpose Register 2 */
    case REG_GP3:        /* General Purpose Register 3 */
        s->regs[c->regmap[offset]] = val;
        break;
    default:
        if (!c->write(s, offset, val)) {
            qemu_log_mask(LOG_UNIMP, "%s: unimplemented register 0x%04x\n",
                          __func__, (uint32_t)offset);
        }
        break;
    }
}

static const MemoryRegionOps allwinner_rtc_ops = {
    .read = allwinner_rtc_read,
    .write = allwinner_rtc_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .valid = {
        .min_access_size = 4,
        .max_access_size = 4,
    },
    .impl.min_access_size = 4,
};

static void allwinner_rtc_reset(DeviceState *dev)
{
    AwRtcState *s = AW_RTC(dev);
    struct tm now;

    /* Clear registers */
    memset(s->regs, 0, sizeof(s->regs));

    /* Get current datetime */
    qemu_get_timedate(&now, 0);

    /* Set RTC with current datetime */
    if (s->base_year > 1900) {
        s->regs[REG_YYMMDD] =  ((now.tm_year + 1900 - s->base_year) << 16) |
                               ((now.tm_mon + 1) << 8) |
                                 now.tm_mday;
        s->regs[REG_HHMMSS] = (((now.tm_wday + 6) % 7) << 29) |
                                  (now.tm_hour << 16) |
                                  (now.tm_min << 8) |
                                   now.tm_sec;
    }
}

static void allwinner_rtc_init(Object *obj)
{
    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
    AwRtcState *s = AW_RTC(obj);

    /* Memory mapping */
    memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_rtc_ops, s,
                          TYPE_AW_RTC, 1 * KiB);
    sysbus_init_mmio(sbd, &s->iomem);
}

static const VMStateDescription allwinner_rtc_vmstate = {
    .name = "allwinner-rtc",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32_ARRAY(regs, AwRtcState, AW_RTC_REGS_NUM),
        VMSTATE_END_OF_LIST()
    }
};

static Property allwinner_rtc_properties[] = {
    DEFINE_PROP_INT32("base-year", AwRtcState, base_year, 0),
    DEFINE_PROP_END_OF_LIST(),
};

static void allwinner_rtc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->reset = allwinner_rtc_reset;
    dc->vmsd = &allwinner_rtc_vmstate;
    device_class_set_props(dc, allwinner_rtc_properties);
}

static void allwinner_rtc_sun4i_init(Object *obj)
{
    AwRtcState *s = AW_RTC(obj);
    s->base_year = 2010;
}

static void allwinner_rtc_sun4i_class_init(ObjectClass *klass, void *data)
{
    AwRtcClass *arc = AW_RTC_CLASS(klass);

    arc->regmap = allwinner_rtc_sun4i_regmap;
    arc->regmap_size = sizeof(allwinner_rtc_sun4i_regmap);
    arc->read = allwinner_rtc_sun4i_read;
    arc->write = allwinner_rtc_sun4i_write;
}

static void allwinner_rtc_sun6i_init(Object *obj)
{
    AwRtcState *s = AW_RTC(obj);
    s->base_year = 1970;
}

static void allwinner_rtc_sun6i_class_init(ObjectClass *klass, void *data)
{
    AwRtcClass *arc = AW_RTC_CLASS(klass);

    arc->regmap = allwinner_rtc_sun6i_regmap;
    arc->regmap_size = sizeof(allwinner_rtc_sun6i_regmap);
    arc->read = allwinner_rtc_sun6i_read;
    arc->write = allwinner_rtc_sun6i_write;
}

static void allwinner_rtc_sun7i_init(Object *obj)
{
    AwRtcState *s = AW_RTC(obj);
    s->base_year = 1970;
}

static void allwinner_rtc_sun7i_class_init(ObjectClass *klass, void *data)
{
    AwRtcClass *arc = AW_RTC_CLASS(klass);
    allwinner_rtc_sun4i_class_init(klass, arc);
}

static const TypeInfo allwinner_rtc_info = {
    .name          = TYPE_AW_RTC,
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_init = allwinner_rtc_init,
    .instance_size = sizeof(AwRtcState),
    .class_init    = allwinner_rtc_class_init,
    .class_size    = sizeof(AwRtcClass),
    .abstract      = true,
};

static const TypeInfo allwinner_rtc_sun4i_info = {
    .name          = TYPE_AW_RTC_SUN4I,
    .parent        = TYPE_AW_RTC,
    .class_init    = allwinner_rtc_sun4i_class_init,
    .instance_init = allwinner_rtc_sun4i_init,
};

static const TypeInfo allwinner_rtc_sun6i_info = {
    .name          = TYPE_AW_RTC_SUN6I,
    .parent        = TYPE_AW_RTC,
    .class_init    = allwinner_rtc_sun6i_class_init,
    .instance_init = allwinner_rtc_sun6i_init,
};

static const TypeInfo allwinner_rtc_sun7i_info = {
    .name          = TYPE_AW_RTC_SUN7I,
    .parent        = TYPE_AW_RTC,
    .class_init    = allwinner_rtc_sun7i_class_init,
    .instance_init = allwinner_rtc_sun7i_init,
};

static void allwinner_rtc_register(void)
{
    type_register_static(&allwinner_rtc_info);
    type_register_static(&allwinner_rtc_sun4i_info);
    type_register_static(&allwinner_rtc_sun6i_info);
    type_register_static(&allwinner_rtc_sun7i_info);
}

type_init(allwinner_rtc_register)
Commit	Line	Data
a9ad9e73 NL	1	/*
	2	* Allwinner Real Time Clock emulation
	3	*
	4	* Copyright (C) 2019 Niek Linnenbank <[email protected]>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include "qemu/osdep.h"
	21	#include "qemu/units.h"
	22	#include "hw/sysbus.h"
	23	#include "migration/vmstate.h"
	24	#include "qemu/log.h"
	25	#include "qemu/module.h"
	26	#include "qemu-common.h"
	27	#include "hw/qdev-properties.h"
	28	#include "hw/rtc/allwinner-rtc.h"
	29	#include "trace.h"
	30
	31	/* RTC registers */
	32	enum {
	33	REG_LOSC = 1, /* Low Oscillator Control */
	34	REG_YYMMDD, /* RTC Year-Month-Day */
	35	REG_HHMMSS, /* RTC Hour-Minute-Second */
	36	REG_ALARM1_WKHHMMSS, /* Alarm1 Week Hour-Minute-Second */
	37	REG_ALARM1_EN, /* Alarm1 Enable */
	38	REG_ALARM1_IRQ_EN, /* Alarm1 IRQ Enable */
	39	REG_ALARM1_IRQ_STA, /* Alarm1 IRQ Status */
	40	REG_GP0, /* General Purpose Register 0 */
	41	REG_GP1, /* General Purpose Register 1 */
	42	REG_GP2, /* General Purpose Register 2 */
	43	REG_GP3, /* General Purpose Register 3 */
	44
	45	/* sun4i registers */
	46	REG_ALARM1_DDHHMMSS, /* Alarm1 Day Hour-Minute-Second */
	47	REG_CPUCFG, /* CPU Configuration Register */
	48
	49	/* sun6i registers */
	50	REG_LOSC_AUTOSTA, /* LOSC Auto Switch Status */
	51	REG_INT_OSC_PRE, /* Internal OSC Clock Prescaler */
	52	REG_ALARM0_COUNTER, /* Alarm0 Counter */
	53	REG_ALARM0_CUR_VLU, /* Alarm0 Counter Current Value */
	54	REG_ALARM0_ENABLE, /* Alarm0 Enable */
	55	REG_ALARM0_IRQ_EN, /* Alarm0 IRQ Enable */
	56	REG_ALARM0_IRQ_STA, /* Alarm0 IRQ Status */
	57	REG_ALARM_CONFIG, /* Alarm Config */
	58	REG_LOSC_OUT_GATING, /* LOSC Output Gating Register */
	59	REG_GP4, /* General Purpose Register 4 */
	60	REG_GP5, /* General Purpose Register 5 */
	61	REG_GP6, /* General Purpose Register 6 */
	62	REG_GP7, /* General Purpose Register 7 */
	63	REG_RTC_DBG, /* RTC Debug Register */
	64	REG_GPL_HOLD_OUT, /* GPL Hold Output Register */
65	REG_VDD_RTC, /* VDD RTC Regulate Register */
66	REG_IC_CHARA, /* IC Characteristics Register */
67	};
68
69	/* RTC register flags */
70	enum {
71	REG_LOSC_YMD = (1 << 7),
72	REG_LOSC_HMS = (1 << 8),
73	};
74
75	/* RTC sun4i register map (offset to name) */
76	const uint8_t allwinner_rtc_sun4i_regmap[] = {
77	[0x0000] = REG_LOSC,
78	[0x0004] = REG_YYMMDD,
79	[0x0008] = REG_HHMMSS,
80	[0x000C] = REG_ALARM1_DDHHMMSS,
81	[0x0010] = REG_ALARM1_WKHHMMSS,
82	[0x0014] = REG_ALARM1_EN,
83	[0x0018] = REG_ALARM1_IRQ_EN,
84	[0x001C] = REG_ALARM1_IRQ_STA,
85	[0x0020] = REG_GP0,
86	[0x0024] = REG_GP1,
87	[0x0028] = REG_GP2,
88	[0x002C] = REG_GP3,
89	[0x003C] = REG_CPUCFG,
90	};
91
92	/* RTC sun6i register map (offset to name) */
93	const uint8_t allwinner_rtc_sun6i_regmap[] = {
94	[0x0000] = REG_LOSC,
95	[0x0004] = REG_LOSC_AUTOSTA,
96	[0x0008] = REG_INT_OSC_PRE,
97	[0x0010] = REG_YYMMDD,
98	[0x0014] = REG_HHMMSS,
99	[0x0020] = REG_ALARM0_COUNTER,
100	[0x0024] = REG_ALARM0_CUR_VLU,
101	[0x0028] = REG_ALARM0_ENABLE,
102	[0x002C] = REG_ALARM0_IRQ_EN,
103	[0x0030] = REG_ALARM0_IRQ_STA,
104	[0x0040] = REG_ALARM1_WKHHMMSS,
105	[0x0044] = REG_ALARM1_EN,
106	[0x0048] = REG_ALARM1_IRQ_EN,
107	[0x004C] = REG_ALARM1_IRQ_STA,
108	[0x0050] = REG_ALARM_CONFIG,
109	[0x0060] = REG_LOSC_OUT_GATING,
110	[0x0100] = REG_GP0,
111	[0x0104] = REG_GP1,
112	[0x0108] = REG_GP2,
113	[0x010C] = REG_GP3,
114	[0x0110] = REG_GP4,
115	[0x0114] = REG_GP5,
116	[0x0118] = REG_GP6,
117	[0x011C] = REG_GP7,
118	[0x0170] = REG_RTC_DBG,
119	[0x0180] = REG_GPL_HOLD_OUT,
120	[0x0190] = REG_VDD_RTC,
121	[0x01F0] = REG_IC_CHARA,
122	};
123
124	static bool allwinner_rtc_sun4i_read(AwRtcState *s, uint32_t offset)
125	{
126	/* no sun4i specific registers currently implemented */
127	return false;
128	}
129
130	static bool allwinner_rtc_sun4i_write(AwRtcState *s, uint32_t offset,
131	uint32_t data)
132	{
133	/* no sun4i specific registers currently implemented */
134	return false;
135	}
136
137	static bool allwinner_rtc_sun6i_read(AwRtcState *s, uint32_t offset)
138	{
139	const AwRtcClass *c = AW_RTC_GET_CLASS(s);
140
141	switch (c->regmap[offset]) {
142	case REG_GP4: /* General Purpose Register 4 */
143	case REG_GP5: /* General Purpose Register 5 */
144	case REG_GP6: /* General Purpose Register 6 */
145	case REG_GP7: /* General Purpose Register 7 */
146	return true;
147	default:
148	break;
149	}
150	return false;
151	}
152
153	static bool allwinner_rtc_sun6i_write(AwRtcState *s, uint32_t offset,
154	uint32_t data)
155	{
156	const AwRtcClass *c = AW_RTC_GET_CLASS(s);
157
158	switch (c->regmap[offset]) {
159	case REG_GP4: /* General Purpose Register 4 */
160	case REG_GP5: /* General Purpose Register 5 */
161	case REG_GP6: /* General Purpose Register 6 */
162	case REG_GP7: /* General Purpose Register 7 */
163	return true;
164	default:
165	break;
166	}
167	return false;
168	}
169
170	static uint64_t allwinner_rtc_read(void *opaque, hwaddr offset,
171	unsigned size)
172	{
173	AwRtcState *s = AW_RTC(opaque);
174	const AwRtcClass *c = AW_RTC_GET_CLASS(s);
175	uint64_t val = 0;
176
177	if (offset >= c->regmap_size) {
178	qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
179	__func__, (uint32_t)offset);
180	return 0;
181	}
182
183	if (!c->regmap[offset]) {
184	qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register 0x%04x\n",
185	__func__, (uint32_t)offset);
186	return 0;
187	}
188
189	switch (c->regmap[offset]) {
190	case REG_LOSC: /* Low Oscillator Control */
191	val = s->regs[REG_LOSC];
192	s->regs[REG_LOSC] &= ~(REG_LOSC_YMD \| REG_LOSC_HMS);
193	break;
194	case REG_YYMMDD: /* RTC Year-Month-Day */
195	case REG_HHMMSS: /* RTC Hour-Minute-Second */
196	case REG_GP0: /* General Purpose Register 0 */
197	case REG_GP1: /* General Purpose Register 1 */
198	case REG_GP2: /* General Purpose Register 2 */
199	case REG_GP3: /* General Purpose Register 3 */
200	val = s->regs[c->regmap[offset]];
201	break;
202	default:
203	if (!c->read(s, offset)) {
204	qemu_log_mask(LOG_UNIMP, "%s: unimplemented register 0x%04x\n",
205	__func__, (uint32_t)offset);
206	}
207	val = s->regs[c->regmap[offset]];
208	break;
209	}
210
211	trace_allwinner_rtc_read(offset, val);
212	return val;
213	}
214
215	static void allwinner_rtc_write(void *opaque, hwaddr offset,
216	uint64_t val, unsigned size)
217	{
218	AwRtcState *s = AW_RTC(opaque);
219	const AwRtcClass *c = AW_RTC_GET_CLASS(s);
220
221	if (offset >= c->regmap_size) {
222	qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
223	__func__, (uint32_t)offset);
224	return;
225	}
226
227	if (!c->regmap[offset]) {
228	qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register 0x%04x\n",
229	__func__, (uint32_t)offset);
230	return;
231	}
232
233	trace_allwinner_rtc_write(offset, val);
234
235	switch (c->regmap[offset]) {
236	case REG_YYMMDD: /* RTC Year-Month-Day */
237	s->regs[REG_YYMMDD] = val;
238	s->regs[REG_LOSC] \|= REG_LOSC_YMD;
239	break;
240	case REG_HHMMSS: /* RTC Hour-Minute-Second */
241	s->regs[REG_HHMMSS] = val;
242	s->regs[REG_LOSC] \|= REG_LOSC_HMS;
243	break;
244	case REG_GP0: /* General Purpose Register 0 */
245	case REG_GP1: /* General Purpose Register 1 */
246	case REG_GP2: /* General Purpose Register 2 */
247	case REG_GP3: /* General Purpose Register 3 */
248	s->regs[c->regmap[offset]] = val;
249	break;
250	default:
251	if (!c->write(s, offset, val)) {
252	qemu_log_mask(LOG_UNIMP, "%s: unimplemented register 0x%04x\n",
253	__func__, (uint32_t)offset);
254	}
255	break;
256	}
257	}
258
259	static const MemoryRegionOps allwinner_rtc_ops = {
260	.read = allwinner_rtc_read,
261	.write = allwinner_rtc_write,
262	.endianness = DEVICE_NATIVE_ENDIAN,
263	.valid = {
264	.min_access_size = 4,
265	.max_access_size = 4,
266	},
267	.impl.min_access_size = 4,
268	};
269
270	static void allwinner_rtc_reset(DeviceState *dev)
271	{
272	AwRtcState *s = AW_RTC(dev);
273	struct tm now;
274
275	/* Clear registers */
276	memset(s->regs, 0, sizeof(s->regs));
277
278	/* Get current datetime */
279	qemu_get_timedate(&now, 0);
280
281	/* Set RTC with current datetime */
282	if (s->base_year > 1900) {
283	s->regs[REG_YYMMDD] = ((now.tm_year + 1900 - s->base_year) << 16) \|
284	((now.tm_mon + 1) << 8) \|
285	now.tm_mday;
286	s->regs[REG_HHMMSS] = (((now.tm_wday + 6) % 7) << 29) \|
287	(now.tm_hour << 16) \|
288	(now.tm_min << 8) \|
289	now.tm_sec;
290	}
291	}
292
293	static void allwinner_rtc_init(Object *obj)
294	{
295	SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
296	AwRtcState *s = AW_RTC(obj);
297
298	/* Memory mapping */
299	memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_rtc_ops, s,
300	TYPE_AW_RTC, 1 * KiB);
301	sysbus_init_mmio(sbd, &s->iomem);
302	}
303
304	static const VMStateDescription allwinner_rtc_vmstate = {
305	.name = "allwinner-rtc",
306	.version_id = 1,
307	.minimum_version_id = 1,
308	.fields = (VMStateField[]) {
309	VMSTATE_UINT32_ARRAY(regs, AwRtcState, AW_RTC_REGS_NUM),
310	VMSTATE_END_OF_LIST()
311	}
312	};
313
314	static Property allwinner_rtc_properties[] = {
315	DEFINE_PROP_INT32("base-year", AwRtcState, base_year, 0),
316	DEFINE_PROP_END_OF_LIST(),
317	};
318
319	static void allwinner_rtc_class_init(ObjectClass klass, void data)
320	{
321	DeviceClass *dc = DEVICE_CLASS(klass);
322
323	dc->reset = allwinner_rtc_reset;
324	dc->vmsd = &allwinner_rtc_vmstate;
325	device_class_set_props(dc, allwinner_rtc_properties);
326	}
327
328	static void allwinner_rtc_sun4i_init(Object *obj)
329	{
330	AwRtcState *s = AW_RTC(obj);
331	s->base_year = 2010;
332	}
333
334	static void allwinner_rtc_sun4i_class_init(ObjectClass klass, void data)
335	{
336	AwRtcClass *arc = AW_RTC_CLASS(klass);
337
338	arc->regmap = allwinner_rtc_sun4i_regmap;
339	arc->regmap_size = sizeof(allwinner_rtc_sun4i_regmap);
340	arc->read = allwinner_rtc_sun4i_read;
341	arc->write = allwinner_rtc_sun4i_write;
342	}
343
344	static void allwinner_rtc_sun6i_init(Object *obj)
345	{
346	AwRtcState *s = AW_RTC(obj);
347	s->base_year = 1970;
348	}
349
350	static void allwinner_rtc_sun6i_class_init(ObjectClass klass, void data)
351	{
352	AwRtcClass *arc = AW_RTC_CLASS(klass);
353
354	arc->regmap = allwinner_rtc_sun6i_regmap;
355	arc->regmap_size = sizeof(allwinner_rtc_sun6i_regmap);
356	arc->read = allwinner_rtc_sun6i_read;
357	arc->write = allwinner_rtc_sun6i_write;
358	}
359
360	static void allwinner_rtc_sun7i_init(Object *obj)
361	{
362	AwRtcState *s = AW_RTC(obj);
363	s->base_year = 1970;
364	}
365
366	static void allwinner_rtc_sun7i_class_init(ObjectClass klass, void data)
367	{
368	AwRtcClass *arc = AW_RTC_CLASS(klass);
369	allwinner_rtc_sun4i_class_init(klass, arc);
370	}
371
372	static const TypeInfo allwinner_rtc_info = {
373	.name = TYPE_AW_RTC,
374	.parent = TYPE_SYS_BUS_DEVICE,
375	.instance_init = allwinner_rtc_init,
376	.instance_size = sizeof(AwRtcState),
377	.class_init = allwinner_rtc_class_init,
378	.class_size = sizeof(AwRtcClass),
379	.abstract = true,
380	};
381
382	static const TypeInfo allwinner_rtc_sun4i_info = {
383	.name = TYPE_AW_RTC_SUN4I,
384	.parent = TYPE_AW_RTC,
385	.class_init = allwinner_rtc_sun4i_class_init,
386	.instance_init = allwinner_rtc_sun4i_init,
387	};
388
389	static const TypeInfo allwinner_rtc_sun6i_info = {
390	.name = TYPE_AW_RTC_SUN6I,
391	.parent = TYPE_AW_RTC,
392	.class_init = allwinner_rtc_sun6i_class_init,
393	.instance_init = allwinner_rtc_sun6i_init,
394	};
395
396	static const TypeInfo allwinner_rtc_sun7i_info = {
397	.name = TYPE_AW_RTC_SUN7I,
398	.parent = TYPE_AW_RTC,
399	.class_init = allwinner_rtc_sun7i_class_init,
400	.instance_init = allwinner_rtc_sun7i_init,
401	};
402
403	static void allwinner_rtc_register(void)
404	{
405	type_register_static(&allwinner_rtc_info);
406	type_register_static(&allwinner_rtc_sun4i_info);
407	type_register_static(&allwinner_rtc_sun6i_info);
408	type_register_static(&allwinner_rtc_sun7i_info);
409	}
410
411	type_init(allwinner_rtc_register)