[mirror_qemu.git] / hw / watchdog / wdt_aspeed.c

/*
 * ASPEED Watchdog Controller
 *
 * Copyright (C) 2016-2017 IBM Corp.
 *
 * This code is licensed under the GPL version 2 or later. See the
 * COPYING file in the top-level directory.
 */

#include "qemu/osdep.h"

#include "qapi/error.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/timer.h"
#include "sysemu/watchdog.h"
#include "hw/misc/aspeed_scu.h"
#include "hw/qdev-properties.h"
#include "hw/sysbus.h"
#include "hw/watchdog/wdt_aspeed.h"
#include "migration/vmstate.h"

#define WDT_STATUS                      (0x00 / 4)
#define WDT_RELOAD_VALUE                (0x04 / 4)
#define WDT_RESTART                     (0x08 / 4)
#define WDT_CTRL                        (0x0C / 4)
#define   WDT_CTRL_RESET_MODE_SOC       (0x00 << 5)
#define   WDT_CTRL_RESET_MODE_FULL_CHIP (0x01 << 5)
#define   WDT_CTRL_1MHZ_CLK             BIT(4)
#define   WDT_CTRL_WDT_EXT              BIT(3)
#define   WDT_CTRL_WDT_INTR             BIT(2)
#define   WDT_CTRL_RESET_SYSTEM         BIT(1)
#define   WDT_CTRL_ENABLE               BIT(0)
#define WDT_RESET_WIDTH                 (0x18 / 4)
#define   WDT_RESET_WIDTH_ACTIVE_HIGH   BIT(31)
#define     WDT_POLARITY_MASK           (0xFF << 24)
#define     WDT_ACTIVE_HIGH_MAGIC       (0xA5 << 24)
#define     WDT_ACTIVE_LOW_MAGIC        (0x5A << 24)
#define   WDT_RESET_WIDTH_PUSH_PULL     BIT(30)
#define     WDT_DRIVE_TYPE_MASK         (0xFF << 24)
#define     WDT_PUSH_PULL_MAGIC         (0xA8 << 24)
#define     WDT_OPEN_DRAIN_MAGIC        (0x8A << 24)
#define WDT_RESET_MASK1                 (0x1c / 4)

#define WDT_TIMEOUT_STATUS              (0x10 / 4)
#define WDT_TIMEOUT_CLEAR               (0x14 / 4)

#define WDT_RESTART_MAGIC               0x4755

#define AST2600_SCU_RESET_CONTROL1      (0x40 / 4)
#define SCU_RESET_CONTROL1              (0x04 / 4)
#define    SCU_RESET_SDRAM              BIT(0)

static bool aspeed_wdt_is_enabled(const AspeedWDTState *s)
{
    return s->regs[WDT_CTRL] & WDT_CTRL_ENABLE;
}

static uint64_t aspeed_wdt_read(void *opaque, hwaddr offset, unsigned size)
{
    AspeedWDTState *s = ASPEED_WDT(opaque);

    offset >>= 2;

    switch (offset) {
    case WDT_STATUS:
        return s->regs[WDT_STATUS];
    case WDT_RELOAD_VALUE:
        return s->regs[WDT_RELOAD_VALUE];
    case WDT_RESTART:
        qemu_log_mask(LOG_GUEST_ERROR,
                      "%s: read from write-only reg at offset 0x%"
                      HWADDR_PRIx "\n", __func__, offset);
        return 0;
    case WDT_CTRL:
        return s->regs[WDT_CTRL];
    case WDT_RESET_WIDTH:
        return s->regs[WDT_RESET_WIDTH];
    case WDT_RESET_MASK1:
        return s->regs[WDT_RESET_MASK1];
    case WDT_TIMEOUT_STATUS:
    case WDT_TIMEOUT_CLEAR:
        qemu_log_mask(LOG_UNIMP,
                      "%s: uninmplemented read at offset 0x%" HWADDR_PRIx "\n",
                      __func__, offset);
        return 0;
    default:
        qemu_log_mask(LOG_GUEST_ERROR,
                      "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
                      __func__, offset);
        return 0;
    }

}

static void aspeed_wdt_reload(AspeedWDTState *s)
{
    uint64_t reload;

    if (!(s->regs[WDT_CTRL] & WDT_CTRL_1MHZ_CLK)) {
        reload = muldiv64(s->regs[WDT_RELOAD_VALUE], NANOSECONDS_PER_SECOND,
                          s->pclk_freq);
    } else {
        reload = s->regs[WDT_RELOAD_VALUE] * 1000ULL;
    }

    if (aspeed_wdt_is_enabled(s)) {
        timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + reload);
    }
}

static void aspeed_wdt_reload_1mhz(AspeedWDTState *s)
{
    uint64_t reload = s->regs[WDT_RELOAD_VALUE] * 1000ULL;

    if (aspeed_wdt_is_enabled(s)) {
        timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + reload);
    }
}

static uint64_t aspeed_2400_sanitize_ctrl(uint64_t data)
{
    return data & 0xffff;
}

static uint64_t aspeed_2500_sanitize_ctrl(uint64_t data)
{
    return (data & ~(0xfUL << 8)) | WDT_CTRL_1MHZ_CLK;
}

static uint64_t aspeed_2600_sanitize_ctrl(uint64_t data)
{
    return data & ~(0x7UL << 7);
}

static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data,
                             unsigned size)
{
    AspeedWDTState *s = ASPEED_WDT(opaque);
    AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(s);
    bool enable;

    offset >>= 2;

    switch (offset) {
    case WDT_STATUS:
        qemu_log_mask(LOG_GUEST_ERROR,
                      "%s: write to read-only reg at offset 0x%"
                      HWADDR_PRIx "\n", __func__, offset);
        break;
    case WDT_RELOAD_VALUE:
        s->regs[WDT_RELOAD_VALUE] = data;
        break;
    case WDT_RESTART:
        if ((data & 0xFFFF) == WDT_RESTART_MAGIC) {
            s->regs[WDT_STATUS] = s->regs[WDT_RELOAD_VALUE];
            awc->wdt_reload(s);
        }
        break;
    case WDT_CTRL:
        data = awc->sanitize_ctrl(data);
        enable = data & WDT_CTRL_ENABLE;
        if (enable && !aspeed_wdt_is_enabled(s)) {
            s->regs[WDT_CTRL] = data;
            awc->wdt_reload(s);
        } else if (!enable && aspeed_wdt_is_enabled(s)) {
            s->regs[WDT_CTRL] = data;
            timer_del(s->timer);
        } else {
            s->regs[WDT_CTRL] = data;
        }
        break;
    case WDT_RESET_WIDTH:
        if (awc->reset_pulse) {
            awc->reset_pulse(s, data & WDT_POLARITY_MASK);
        }
        s->regs[WDT_RESET_WIDTH] &= ~awc->ext_pulse_width_mask;
        s->regs[WDT_RESET_WIDTH] |= data & awc->ext_pulse_width_mask;
        break;

    case WDT_RESET_MASK1:
        /* TODO: implement */
        s->regs[WDT_RESET_MASK1] = data;
        break;

    case WDT_TIMEOUT_STATUS:
    case WDT_TIMEOUT_CLEAR:
        qemu_log_mask(LOG_UNIMP,
                      "%s: uninmplemented write at offset 0x%" HWADDR_PRIx "\n",
                      __func__, offset);
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR,
                      "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
                      __func__, offset);
    }
    return;
}

static WatchdogTimerModel model = {
    .wdt_name = TYPE_ASPEED_WDT,
    .wdt_description = "Aspeed watchdog device",
};

static const VMStateDescription vmstate_aspeed_wdt = {
    .name = "vmstate_aspeed_wdt",
    .version_id = 0,
    .minimum_version_id = 0,
    .fields = (VMStateField[]) {
        VMSTATE_TIMER_PTR(timer, AspeedWDTState),
        VMSTATE_UINT32_ARRAY(regs, AspeedWDTState, ASPEED_WDT_REGS_MAX),
        VMSTATE_END_OF_LIST()
    }
};

static const MemoryRegionOps aspeed_wdt_ops = {
    .read = aspeed_wdt_read,
    .write = aspeed_wdt_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
    .valid.min_access_size = 4,
    .valid.max_access_size = 4,
    .valid.unaligned = false,
};

static void aspeed_wdt_reset(DeviceState *dev)
{
    AspeedWDTState *s = ASPEED_WDT(dev);
    AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(s);

    s->regs[WDT_STATUS] = 0x3EF1480;
    s->regs[WDT_RELOAD_VALUE] = 0x03EF1480;
    s->regs[WDT_RESTART] = 0;
    s->regs[WDT_CTRL] = awc->sanitize_ctrl(0);
    s->regs[WDT_RESET_WIDTH] = 0xFF;

    timer_del(s->timer);
}

static void aspeed_wdt_timer_expired(void *dev)
{
    AspeedWDTState *s = ASPEED_WDT(dev);
    uint32_t reset_ctrl_reg = ASPEED_WDT_GET_CLASS(s)->reset_ctrl_reg;

    /* Do not reset on SDRAM controller reset */
    if (s->scu->regs[reset_ctrl_reg] & SCU_RESET_SDRAM) {
        timer_del(s->timer);
        s->regs[WDT_CTRL] = 0;
        return;
    }

    qemu_log_mask(CPU_LOG_RESET, "Watchdog timer %" HWADDR_PRIx " expired.\n",
                  s->iomem.addr);
    watchdog_perform_action();
    timer_del(s->timer);
}

#define PCLK_HZ 24000000

static void aspeed_wdt_realize(DeviceState *dev, Error **errp)
{
    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
    AspeedWDTState *s = ASPEED_WDT(dev);

    assert(s->scu);

    s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, aspeed_wdt_timer_expired, dev);

    /* FIXME: This setting should be derived from the SCU hw strapping
     * register SCU70
     */
    s->pclk_freq = PCLK_HZ;

    memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_wdt_ops, s,
                          TYPE_ASPEED_WDT, ASPEED_WDT_REGS_MAX * 4);
    sysbus_init_mmio(sbd, &s->iomem);
}

static Property aspeed_wdt_properties[] = {
    DEFINE_PROP_LINK("scu", AspeedWDTState, scu, TYPE_ASPEED_SCU,
                     AspeedSCUState *),
    DEFINE_PROP_END_OF_LIST(),
};

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

    dc->desc = "ASPEED Watchdog Controller";
    dc->realize = aspeed_wdt_realize;
    dc->reset = aspeed_wdt_reset;
    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
    dc->vmsd = &vmstate_aspeed_wdt;
    device_class_set_props(dc, aspeed_wdt_properties);
}

static const TypeInfo aspeed_wdt_info = {
    .parent = TYPE_SYS_BUS_DEVICE,
    .name  = TYPE_ASPEED_WDT,
    .instance_size  = sizeof(AspeedWDTState),
    .class_init = aspeed_wdt_class_init,
    .class_size    = sizeof(AspeedWDTClass),
    .abstract      = true,
};

static void aspeed_2400_wdt_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);

    dc->desc = "ASPEED 2400 Watchdog Controller";
    awc->offset = 0x20;
    awc->ext_pulse_width_mask = 0xff;
    awc->reset_ctrl_reg = SCU_RESET_CONTROL1;
    awc->wdt_reload = aspeed_wdt_reload;
    awc->sanitize_ctrl = aspeed_2400_sanitize_ctrl;
}

static const TypeInfo aspeed_2400_wdt_info = {
    .name = TYPE_ASPEED_2400_WDT,
    .parent = TYPE_ASPEED_WDT,
    .instance_size = sizeof(AspeedWDTState),
    .class_init = aspeed_2400_wdt_class_init,
};

static void aspeed_2500_wdt_reset_pulse(AspeedWDTState *s, uint32_t property)
{
    if (property) {
        if (property == WDT_ACTIVE_HIGH_MAGIC) {
            s->regs[WDT_RESET_WIDTH] |= WDT_RESET_WIDTH_ACTIVE_HIGH;
        } else if (property == WDT_ACTIVE_LOW_MAGIC) {
            s->regs[WDT_RESET_WIDTH] &= ~WDT_RESET_WIDTH_ACTIVE_HIGH;
        } else if (property == WDT_PUSH_PULL_MAGIC) {
            s->regs[WDT_RESET_WIDTH] |= WDT_RESET_WIDTH_PUSH_PULL;
        } else if (property == WDT_OPEN_DRAIN_MAGIC) {
            s->regs[WDT_RESET_WIDTH] &= ~WDT_RESET_WIDTH_PUSH_PULL;
        }
    }
}

static void aspeed_2500_wdt_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);

    dc->desc = "ASPEED 2500 Watchdog Controller";
    awc->offset = 0x20;
    awc->ext_pulse_width_mask = 0xfffff;
    awc->reset_ctrl_reg = SCU_RESET_CONTROL1;
    awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
    awc->wdt_reload = aspeed_wdt_reload_1mhz;
    awc->sanitize_ctrl = aspeed_2500_sanitize_ctrl;
}

static const TypeInfo aspeed_2500_wdt_info = {
    .name = TYPE_ASPEED_2500_WDT,
    .parent = TYPE_ASPEED_WDT,
    .instance_size = sizeof(AspeedWDTState),
    .class_init = aspeed_2500_wdt_class_init,
};

static void aspeed_2600_wdt_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);

    dc->desc = "ASPEED 2600 Watchdog Controller";
    awc->offset = 0x40;
    awc->ext_pulse_width_mask = 0xfffff; /* TODO */
    awc->reset_ctrl_reg = AST2600_SCU_RESET_CONTROL1;
    awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
    awc->wdt_reload = aspeed_wdt_reload_1mhz;
    awc->sanitize_ctrl = aspeed_2600_sanitize_ctrl;
}

static const TypeInfo aspeed_2600_wdt_info = {
    .name = TYPE_ASPEED_2600_WDT,
    .parent = TYPE_ASPEED_WDT,
    .instance_size = sizeof(AspeedWDTState),
    .class_init = aspeed_2600_wdt_class_init,
};

static void wdt_aspeed_register_types(void)
{
    watchdog_add_model(&model);
    type_register_static(&aspeed_wdt_info);
    type_register_static(&aspeed_2400_wdt_info);
    type_register_static(&aspeed_2500_wdt_info);
    type_register_static(&aspeed_2600_wdt_info);
}

type_init(wdt_aspeed_register_types)
Commit	Line	Data
854123bf CLG	1	/*
	2	* ASPEED Watchdog Controller
	3	*
	4	* Copyright (C) 2016-2017 IBM Corp.
	5	*
	6	* This code is licensed under the GPL version 2 or later. See the
	7	* COPYING file in the top-level directory.
	8	*/
	9
	10	#include "qemu/osdep.h"
f55d613b AJ	11
f55d613b AJ	12	#include "qapi/error.h"
854123bf	13	#include "qemu/log.h"
0b8fa32f	14	#include "qemu/module.h"
f55d613b	15	#include "qemu/timer.h"
854123bf	16	#include "sysemu/watchdog.h"
f55d613b	17	#include "hw/misc/aspeed_scu.h"
a27bd6c7	18	#include "hw/qdev-properties.h"
854123bf	19	#include "hw/sysbus.h"
854123bf	20	#include "hw/watchdog/wdt_aspeed.h"
d6454270	21	#include "migration/vmstate.h"
854123bf	22
f55d613b AJ	23	#define WDT_STATUS (0x00 / 4)
	24	#define WDT_RELOAD_VALUE (0x04 / 4)
	25	#define WDT_RESTART (0x08 / 4)
	26	#define WDT_CTRL (0x0C / 4)
854123bf CLG	27	#define WDT_CTRL_RESET_MODE_SOC (0x00 << 5)
	28	#define WDT_CTRL_RESET_MODE_FULL_CHIP (0x01 << 5)
	29	#define WDT_CTRL_1MHZ_CLK BIT(4)
	30	#define WDT_CTRL_WDT_EXT BIT(3)
	31	#define WDT_CTRL_WDT_INTR BIT(2)
	32	#define WDT_CTRL_RESET_SYSTEM BIT(1)
	33	#define WDT_CTRL_ENABLE BIT(0)
f55d613b AJ	34	#define WDT_RESET_WIDTH (0x18 / 4)
	35	#define WDT_RESET_WIDTH_ACTIVE_HIGH BIT(31)
	36	#define WDT_POLARITY_MASK (0xFF << 24)
	37	#define WDT_ACTIVE_HIGH_MAGIC (0xA5 << 24)
	38	#define WDT_ACTIVE_LOW_MAGIC (0x5A << 24)
	39	#define WDT_RESET_WIDTH_PUSH_PULL BIT(30)
	40	#define WDT_DRIVE_TYPE_MASK (0xFF << 24)
	41	#define WDT_PUSH_PULL_MAGIC (0xA8 << 24)
	42	#define WDT_OPEN_DRAIN_MAGIC (0x8A << 24)
6b2b2a70	43	#define WDT_RESET_MASK1 (0x1c / 4)
854123bf	44
f55d613b AJ	45	#define WDT_TIMEOUT_STATUS (0x10 / 4)
f55d613b AJ	46	#define WDT_TIMEOUT_CLEAR (0x14 / 4)
854123bf	47
f55d613b	48	#define WDT_RESTART_MAGIC 0x4755
854123bf	49
6b2b2a70	50	#define AST2600_SCU_RESET_CONTROL1 (0x40 / 4)
3059c2f5 JS	51	#define SCU_RESET_CONTROL1 (0x04 / 4)
	52	#define SCU_RESET_SDRAM BIT(0)
	53
854123bf CLG	54	static bool aspeed_wdt_is_enabled(const AspeedWDTState *s)
	55	{
	56	return s->regs[WDT_CTRL] & WDT_CTRL_ENABLE;
	57	}
	58
	59	static uint64_t aspeed_wdt_read(void *opaque, hwaddr offset, unsigned size)
	60	{
	61	AspeedWDTState *s = ASPEED_WDT(opaque);
	62
	63	offset >>= 2;
	64
	65	switch (offset) {
	66	case WDT_STATUS:
	67	return s->regs[WDT_STATUS];
	68	case WDT_RELOAD_VALUE:
	69	return s->regs[WDT_RELOAD_VALUE];
	70	case WDT_RESTART:
	71	qemu_log_mask(LOG_GUEST_ERROR,
	72	"%s: read from write-only reg at offset 0x%"
	73	HWADDR_PRIx "\n", __func__, offset);
	74	return 0;
	75	case WDT_CTRL:
	76	return s->regs[WDT_CTRL];
f55d613b AJ	77	case WDT_RESET_WIDTH:
f55d613b AJ	78	return s->regs[WDT_RESET_WIDTH];
6b2b2a70 JS	79	case WDT_RESET_MASK1:
6b2b2a70 JS	80	return s->regs[WDT_RESET_MASK1];
854123bf CLG	81	case WDT_TIMEOUT_STATUS:
854123bf CLG	82	case WDT_TIMEOUT_CLEAR:
854123bf CLG	83	qemu_log_mask(LOG_UNIMP,
	84	"%s: uninmplemented read at offset 0x%" HWADDR_PRIx "\n",
	85	__func__, offset);
	86	return 0;
	87	default:
	88	qemu_log_mask(LOG_GUEST_ERROR,
	89	"%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
	90	__func__, offset);
	91	return 0;
	92	}
	93
	94	}
	95
28c80f15	96	static void aspeed_wdt_reload(AspeedWDTState *s)
854123bf	97	{
f958537a	98	uint64_t reload;
854123bf	99
28c80f15	100	if (!(s->regs[WDT_CTRL] & WDT_CTRL_1MHZ_CLK)) {
854123bf CLG	101	reload = muldiv64(s->regs[WDT_RELOAD_VALUE], NANOSECONDS_PER_SECOND,
	102	s->pclk_freq);
	103	} else {
f958537a	104	reload = s->regs[WDT_RELOAD_VALUE] * 1000ULL;
854123bf CLG	105	}
	106
	107	if (aspeed_wdt_is_enabled(s)) {
	108	timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + reload);
	109	}
	110	}
	111
28c80f15 JS	112	static void aspeed_wdt_reload_1mhz(AspeedWDTState *s)
	113	{
	114	uint64_t reload = s->regs[WDT_RELOAD_VALUE] * 1000ULL;
	115
	116	if (aspeed_wdt_is_enabled(s)) {
	117	timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + reload);
	118	}
	119	}
	120
709098fd AJ	121	static uint64_t aspeed_2400_sanitize_ctrl(uint64_t data)
	122	{
	123	return data & 0xffff;
	124	}
	125
	126	static uint64_t aspeed_2500_sanitize_ctrl(uint64_t data)
	127	{
	128	return (data & ~(0xfUL << 8)) \| WDT_CTRL_1MHZ_CLK;
	129	}
	130
	131	static uint64_t aspeed_2600_sanitize_ctrl(uint64_t data)
	132	{
	133	return data & ~(0x7UL << 7);
	134	}
28c80f15	135
854123bf CLG	136	static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data,
	137	unsigned size)
	138	{
	139	AspeedWDTState *s = ASPEED_WDT(opaque);
6112bd6d	140	AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(s);
709098fd	141	bool enable;
854123bf CLG	142
	143	offset >>= 2;
	144
	145	switch (offset) {
	146	case WDT_STATUS:
	147	qemu_log_mask(LOG_GUEST_ERROR,
	148	"%s: write to read-only reg at offset 0x%"
	149	HWADDR_PRIx "\n", __func__, offset);
	150	break;
	151	case WDT_RELOAD_VALUE:
	152	s->regs[WDT_RELOAD_VALUE] = data;
	153	break;
	154	case WDT_RESTART:
	155	if ((data & 0xFFFF) == WDT_RESTART_MAGIC) {
	156	s->regs[WDT_STATUS] = s->regs[WDT_RELOAD_VALUE];
28c80f15	157	awc->wdt_reload(s);
854123bf CLG	158	}
	159	break;
	160	case WDT_CTRL:
709098fd AJ	161	data = awc->sanitize_ctrl(data);
709098fd AJ	162	enable = data & WDT_CTRL_ENABLE;
854123bf CLG	163	if (enable && !aspeed_wdt_is_enabled(s)) {
854123bf CLG	164	s->regs[WDT_CTRL] = data;
28c80f15	165	awc->wdt_reload(s);
854123bf CLG	166	} else if (!enable && aspeed_wdt_is_enabled(s)) {
	167	s->regs[WDT_CTRL] = data;
	168	timer_del(s->timer);
74b67e1f AJ	169	} else {
74b67e1f AJ	170	s->regs[WDT_CTRL] = data;
854123bf CLG	171	}
854123bf CLG	172	break;
f55d613b	173	case WDT_RESET_WIDTH:
6112bd6d CLG	174	if (awc->reset_pulse) {
6112bd6d CLG	175	awc->reset_pulse(s, data & WDT_POLARITY_MASK);
f55d613b	176	}
6112bd6d CLG	177	s->regs[WDT_RESET_WIDTH] &= ~awc->ext_pulse_width_mask;
6112bd6d CLG	178	s->regs[WDT_RESET_WIDTH] \|= data & awc->ext_pulse_width_mask;
f55d613b	179	break;
6112bd6d	180
6b2b2a70 JS	181	case WDT_RESET_MASK1:
	182	/* TODO: implement */
	183	s->regs[WDT_RESET_MASK1] = data;
	184	break;
	185
854123bf CLG	186	case WDT_TIMEOUT_STATUS:
854123bf CLG	187	case WDT_TIMEOUT_CLEAR:
854123bf CLG	188	qemu_log_mask(LOG_UNIMP,
	189	"%s: uninmplemented write at offset 0x%" HWADDR_PRIx "\n",
	190	__func__, offset);
	191	break;
	192	default:
	193	qemu_log_mask(LOG_GUEST_ERROR,
	194	"%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
	195	__func__, offset);
	196	}
	197	return;
	198	}
	199
	200	static WatchdogTimerModel model = {
	201	.wdt_name = TYPE_ASPEED_WDT,
	202	.wdt_description = "Aspeed watchdog device",
	203	};
	204
	205	static const VMStateDescription vmstate_aspeed_wdt = {
	206	.name = "vmstate_aspeed_wdt",
	207	.version_id = 0,
	208	.minimum_version_id = 0,
	209	.fields = (VMStateField[]) {
	210	VMSTATE_TIMER_PTR(timer, AspeedWDTState),
	211	VMSTATE_UINT32_ARRAY(regs, AspeedWDTState, ASPEED_WDT_REGS_MAX),
	212	VMSTATE_END_OF_LIST()
	213	}
	214	};
	215
	216	static const MemoryRegionOps aspeed_wdt_ops = {
	217	.read = aspeed_wdt_read,
	218	.write = aspeed_wdt_write,
	219	.endianness = DEVICE_LITTLE_ENDIAN,
	220	.valid.min_access_size = 4,
	221	.valid.max_access_size = 4,
	222	.valid.unaligned = false,
	223	};
	224
	225	static void aspeed_wdt_reset(DeviceState *dev)
	226	{
	227	AspeedWDTState *s = ASPEED_WDT(dev);
709098fd	228	AspeedWDTClass *awc = ASPEED_WDT_GET_CLASS(s);
854123bf CLG	229
	230	s->regs[WDT_STATUS] = 0x3EF1480;
	231	s->regs[WDT_RELOAD_VALUE] = 0x03EF1480;
	232	s->regs[WDT_RESTART] = 0;
709098fd	233	s->regs[WDT_CTRL] = awc->sanitize_ctrl(0);
f55d613b	234	s->regs[WDT_RESET_WIDTH] = 0xFF;
854123bf CLG	235
	236	timer_del(s->timer);
	237	}
	238
	239	static void aspeed_wdt_timer_expired(void *dev)
	240	{
	241	AspeedWDTState *s = ASPEED_WDT(dev);
6112bd6d	242	uint32_t reset_ctrl_reg = ASPEED_WDT_GET_CLASS(s)->reset_ctrl_reg;
854123bf	243
3059c2f5	244	/* Do not reset on SDRAM controller reset */
6112bd6d	245	if (s->scu->regs[reset_ctrl_reg] & SCU_RESET_SDRAM) {
3059c2f5 JS	246	timer_del(s->timer);
	247	s->regs[WDT_CTRL] = 0;
	248	return;
	249	}
	250
aabf1de4 JS	251	qemu_log_mask(CPU_LOG_RESET, "Watchdog timer %" HWADDR_PRIx " expired.\n",
aabf1de4 JS	252	s->iomem.addr);
854123bf CLG	253	watchdog_perform_action();
	254	timer_del(s->timer);
	255	}
	256
	257	#define PCLK_HZ 24000000
	258
	259	static void aspeed_wdt_realize(DeviceState dev, Error *errp)
	260	{
	261	SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
	262	AspeedWDTState *s = ASPEED_WDT(dev);
3059c2f5	263
2ec11f23	264	assert(s->scu);
854123bf CLG	265
	266	s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, aspeed_wdt_timer_expired, dev);
	267
	268	/* FIXME: This setting should be derived from the SCU hw strapping
	269	* register SCU70
	270	*/
	271	s->pclk_freq = PCLK_HZ;
	272
	273	memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_wdt_ops, s,
	274	TYPE_ASPEED_WDT, ASPEED_WDT_REGS_MAX * 4);
	275	sysbus_init_mmio(sbd, &s->iomem);
	276	}
	277
2ec11f23 CLG	278	static Property aspeed_wdt_properties[] = {
	279	DEFINE_PROP_LINK("scu", AspeedWDTState, scu, TYPE_ASPEED_SCU,
	280	AspeedSCUState *),
	281	DEFINE_PROP_END_OF_LIST(),
	282	};
	283
854123bf CLG	284	static void aspeed_wdt_class_init(ObjectClass klass, void data)
	285	{
	286	DeviceClass *dc = DEVICE_CLASS(klass);
	287
6112bd6d	288	dc->desc = "ASPEED Watchdog Controller";
854123bf CLG	289	dc->realize = aspeed_wdt_realize;
	290	dc->reset = aspeed_wdt_reset;
	291	set_bit(DEVICE_CATEGORY_MISC, dc->categories);
	292	dc->vmsd = &vmstate_aspeed_wdt;
4f67d30b	293	device_class_set_props(dc, aspeed_wdt_properties);
854123bf CLG	294	}
	295
	296	static const TypeInfo aspeed_wdt_info = {
	297	.parent = TYPE_SYS_BUS_DEVICE,
	298	.name = TYPE_ASPEED_WDT,
	299	.instance_size = sizeof(AspeedWDTState),
	300	.class_init = aspeed_wdt_class_init,
6112bd6d CLG	301	.class_size = sizeof(AspeedWDTClass),
	302	.abstract = true,
	303	};
	304
	305	static void aspeed_2400_wdt_class_init(ObjectClass klass, void data)
	306	{
	307	DeviceClass *dc = DEVICE_CLASS(klass);
	308	AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
	309
	310	dc->desc = "ASPEED 2400 Watchdog Controller";
	311	awc->offset = 0x20;
	312	awc->ext_pulse_width_mask = 0xff;
	313	awc->reset_ctrl_reg = SCU_RESET_CONTROL1;
28c80f15	314	awc->wdt_reload = aspeed_wdt_reload;
709098fd	315	awc->sanitize_ctrl = aspeed_2400_sanitize_ctrl;
6112bd6d CLG	316	}
	317
	318	static const TypeInfo aspeed_2400_wdt_info = {
	319	.name = TYPE_ASPEED_2400_WDT,
	320	.parent = TYPE_ASPEED_WDT,
	321	.instance_size = sizeof(AspeedWDTState),
	322	.class_init = aspeed_2400_wdt_class_init,
	323	};
	324
	325	static void aspeed_2500_wdt_reset_pulse(AspeedWDTState *s, uint32_t property)
	326	{
	327	if (property) {
	328	if (property == WDT_ACTIVE_HIGH_MAGIC) {
	329	s->regs[WDT_RESET_WIDTH] \|= WDT_RESET_WIDTH_ACTIVE_HIGH;
	330	} else if (property == WDT_ACTIVE_LOW_MAGIC) {
	331	s->regs[WDT_RESET_WIDTH] &= ~WDT_RESET_WIDTH_ACTIVE_HIGH;
	332	} else if (property == WDT_PUSH_PULL_MAGIC) {
	333	s->regs[WDT_RESET_WIDTH] \|= WDT_RESET_WIDTH_PUSH_PULL;
	334	} else if (property == WDT_OPEN_DRAIN_MAGIC) {
	335	s->regs[WDT_RESET_WIDTH] &= ~WDT_RESET_WIDTH_PUSH_PULL;
	336	}
	337	}
	338	}
	339
	340	static void aspeed_2500_wdt_class_init(ObjectClass klass, void data)
	341	{
	342	DeviceClass *dc = DEVICE_CLASS(klass);
	343	AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
	344
	345	dc->desc = "ASPEED 2500 Watchdog Controller";
	346	awc->offset = 0x20;
	347	awc->ext_pulse_width_mask = 0xfffff;
	348	awc->reset_ctrl_reg = SCU_RESET_CONTROL1;
	349	awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
28c80f15	350	awc->wdt_reload = aspeed_wdt_reload_1mhz;
709098fd	351	awc->sanitize_ctrl = aspeed_2500_sanitize_ctrl;
6112bd6d CLG	352	}
	353
	354	static const TypeInfo aspeed_2500_wdt_info = {
	355	.name = TYPE_ASPEED_2500_WDT,
	356	.parent = TYPE_ASPEED_WDT,
	357	.instance_size = sizeof(AspeedWDTState),
	358	.class_init = aspeed_2500_wdt_class_init,
854123bf CLG	359	};
854123bf CLG	360
6b2b2a70 JS	361	static void aspeed_2600_wdt_class_init(ObjectClass klass, void data)
	362	{
	363	DeviceClass *dc = DEVICE_CLASS(klass);
	364	AspeedWDTClass *awc = ASPEED_WDT_CLASS(klass);
	365
	366	dc->desc = "ASPEED 2600 Watchdog Controller";
	367	awc->offset = 0x40;
	368	awc->ext_pulse_width_mask = 0xfffff; /* TODO */
	369	awc->reset_ctrl_reg = AST2600_SCU_RESET_CONTROL1;
	370	awc->reset_pulse = aspeed_2500_wdt_reset_pulse;
28c80f15	371	awc->wdt_reload = aspeed_wdt_reload_1mhz;
709098fd	372	awc->sanitize_ctrl = aspeed_2600_sanitize_ctrl;
6b2b2a70 JS	373	}
	374
	375	static const TypeInfo aspeed_2600_wdt_info = {
	376	.name = TYPE_ASPEED_2600_WDT,
	377	.parent = TYPE_ASPEED_WDT,
	378	.instance_size = sizeof(AspeedWDTState),
	379	.class_init = aspeed_2600_wdt_class_init,
	380	};
	381
854123bf CLG	382	static void wdt_aspeed_register_types(void)
	383	{
	384	watchdog_add_model(&model);
	385	type_register_static(&aspeed_wdt_info);
6112bd6d CLG	386	type_register_static(&aspeed_2400_wdt_info);
6112bd6d CLG	387	type_register_static(&aspeed_2500_wdt_info);
6b2b2a70	388	type_register_static(&aspeed_2600_wdt_info);
854123bf CLG	389	}
	390
	391	type_init(wdt_aspeed_register_types)