[qemu.git] / hw / grlib_gptimer.c

/*
 * QEMU GRLIB GPTimer Emulator
 *
 * Copyright (c) 2010-2011 AdaCore
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "sysbus.h"
#include "qemu/timer.h"
#include "ptimer.h"

#include "trace.h"

#define UNIT_REG_SIZE    16     /* Size of memory mapped regs for the unit */
#define GPTIMER_REG_SIZE 16     /* Size of memory mapped regs for a GPTimer */

#define GPTIMER_MAX_TIMERS 8

/* GPTimer Config register fields */
#define GPTIMER_ENABLE      (1 << 0)
#define GPTIMER_RESTART     (1 << 1)
#define GPTIMER_LOAD        (1 << 2)
#define GPTIMER_INT_ENABLE  (1 << 3)
#define GPTIMER_INT_PENDING (1 << 4)
#define GPTIMER_CHAIN       (1 << 5) /* Not supported */
#define GPTIMER_DEBUG_HALT  (1 << 6) /* Not supported */

/* Memory mapped register offsets */
#define SCALER_OFFSET         0x00
#define SCALER_RELOAD_OFFSET  0x04
#define CONFIG_OFFSET         0x08
#define COUNTER_OFFSET        0x00
#define COUNTER_RELOAD_OFFSET 0x04
#define TIMER_BASE            0x10

typedef struct GPTimer     GPTimer;
typedef struct GPTimerUnit GPTimerUnit;

struct GPTimer {
    QEMUBH *bh;
    struct ptimer_state *ptimer;

    qemu_irq     irq;
    int          id;
    GPTimerUnit *unit;

    /* registers */
    uint32_t counter;
    uint32_t reload;
    uint32_t config;
};

struct GPTimerUnit {
    SysBusDevice  busdev;
    MemoryRegion iomem;

    uint32_t nr_timers;         /* Number of timers available */
    uint32_t freq_hz;           /* System frequency */
    uint32_t irq_line;          /* Base irq line */

    GPTimer *timers;

    /* registers */
    uint32_t scaler;
    uint32_t reload;
    uint32_t config;
};

static void grlib_gptimer_enable(GPTimer *timer)
{
    assert(timer != NULL);


    ptimer_stop(timer->ptimer);

    if (!(timer->config & GPTIMER_ENABLE)) {
        /* Timer disabled */
        trace_grlib_gptimer_disabled(timer->id, timer->config);
        return;
    }

    /* ptimer is triggered when the counter reach 0 but GPTimer is triggered at
       underflow. Set count + 1 to simulate the GPTimer behavior. */

    trace_grlib_gptimer_enable(timer->id, timer->counter + 1);

    ptimer_set_count(timer->ptimer, timer->counter + 1);
    ptimer_run(timer->ptimer, 1);
}

static void grlib_gptimer_restart(GPTimer *timer)
{
    assert(timer != NULL);

    trace_grlib_gptimer_restart(timer->id, timer->reload);

    timer->counter = timer->reload;
    grlib_gptimer_enable(timer);
}

static void grlib_gptimer_set_scaler(GPTimerUnit *unit, uint32_t scaler)
{
    int i = 0;
    uint32_t value = 0;

    assert(unit != NULL);

    if (scaler > 0) {
        value = unit->freq_hz / (scaler + 1);
    } else {
        value = unit->freq_hz;
    }

    trace_grlib_gptimer_set_scaler(scaler, value);

    for (i = 0; i < unit->nr_timers; i++) {
        ptimer_set_freq(unit->timers[i].ptimer, value);
    }
}

static void grlib_gptimer_hit(void *opaque)
{
    GPTimer *timer = opaque;
    assert(timer != NULL);

    trace_grlib_gptimer_hit(timer->id);

    /* Timer expired */

    if (timer->config & GPTIMER_INT_ENABLE) {
        /* Set the pending bit (only unset by write in the config register) */
        timer->config |= GPTIMER_INT_PENDING;
        qemu_irq_pulse(timer->irq);
    }

    if (timer->config & GPTIMER_RESTART) {
        grlib_gptimer_restart(timer);
    }
}

static uint64_t grlib_gptimer_read(void *opaque, hwaddr addr,
                                   unsigned size)
{
    GPTimerUnit        *unit  = opaque;
    hwaddr  timer_addr;
    int                 id;
    uint32_t            value = 0;

    addr &= 0xff;

    /* Unit registers */
    switch (addr) {
    case SCALER_OFFSET:
        trace_grlib_gptimer_readl(-1, addr, unit->scaler);
        return unit->scaler;

    case SCALER_RELOAD_OFFSET:
        trace_grlib_gptimer_readl(-1, addr, unit->reload);
        return unit->reload;

    case CONFIG_OFFSET:
        trace_grlib_gptimer_readl(-1, addr, unit->config);
        return unit->config;

    default:
        break;
    }

    timer_addr = (addr % TIMER_BASE);
    id         = (addr - TIMER_BASE) / TIMER_BASE;

    if (id >= 0 && id < unit->nr_timers) {

        /* GPTimer registers */
        switch (timer_addr) {
        case COUNTER_OFFSET:
            value = ptimer_get_count(unit->timers[id].ptimer);
            trace_grlib_gptimer_readl(id, addr, value);
            return value;

        case COUNTER_RELOAD_OFFSET:
            value = unit->timers[id].reload;
            trace_grlib_gptimer_readl(id, addr, value);
            return value;

        case CONFIG_OFFSET:
            trace_grlib_gptimer_readl(id, addr, unit->timers[id].config);
            return unit->timers[id].config;

        default:
            break;
        }

    }

    trace_grlib_gptimer_readl(-1, addr, 0);
    return 0;
}

static void grlib_gptimer_write(void *opaque, hwaddr addr,
                                uint64_t value, unsigned size)
{
    GPTimerUnit        *unit = opaque;
    hwaddr  timer_addr;
    int                 id;

    addr &= 0xff;

    /* Unit registers */
    switch (addr) {
    case SCALER_OFFSET:
        value &= 0xFFFF; /* clean up the value */
        unit->scaler = value;
        trace_grlib_gptimer_writel(-1, addr, unit->scaler);
        return;

    case SCALER_RELOAD_OFFSET:
        value &= 0xFFFF; /* clean up the value */
        unit->reload = value;
        trace_grlib_gptimer_writel(-1, addr, unit->reload);
        grlib_gptimer_set_scaler(unit, value);
        return;

    case CONFIG_OFFSET:
        /* Read Only (disable timer freeze not supported) */
        trace_grlib_gptimer_writel(-1, addr, 0);
        return;

    default:
        break;
    }

    timer_addr = (addr % TIMER_BASE);
    id         = (addr - TIMER_BASE) / TIMER_BASE;

    if (id >= 0 && id < unit->nr_timers) {

        /* GPTimer registers */
        switch (timer_addr) {
        case COUNTER_OFFSET:
            trace_grlib_gptimer_writel(id, addr, value);
            unit->timers[id].counter = value;
            grlib_gptimer_enable(&unit->timers[id]);
            return;

        case COUNTER_RELOAD_OFFSET:
            trace_grlib_gptimer_writel(id, addr, value);
            unit->timers[id].reload = value;
            return;

        case CONFIG_OFFSET:
            trace_grlib_gptimer_writel(id, addr, value);

            if (value & GPTIMER_INT_PENDING) {
                /* clear pending bit */
                value &= ~GPTIMER_INT_PENDING;
            } else {
                /* keep pending bit */
                value |= unit->timers[id].config & GPTIMER_INT_PENDING;
            }

            unit->timers[id].config = value;

            /* gptimer_restart calls gptimer_enable, so if "enable" and "load"
               bits are present, we just have to call restart. */

            if (value & GPTIMER_LOAD) {
                grlib_gptimer_restart(&unit->timers[id]);
            } else if (value & GPTIMER_ENABLE) {
                grlib_gptimer_enable(&unit->timers[id]);
            }

            /* These fields must always be read as 0 */
            value &= ~(GPTIMER_LOAD & GPTIMER_DEBUG_HALT);

            unit->timers[id].config = value;
            return;

        default:
            break;
        }

    }

    trace_grlib_gptimer_writel(-1, addr, value);
}

static const MemoryRegionOps grlib_gptimer_ops = {
    .read = grlib_gptimer_read,
    .write = grlib_gptimer_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .valid = {
        .min_access_size = 4,
        .max_access_size = 4,
    },
};

static void grlib_gptimer_reset(DeviceState *d)
{
    GPTimerUnit *unit = container_of(d, GPTimerUnit, busdev.qdev);
    int          i    = 0;

    assert(unit != NULL);

    unit->scaler = 0;
    unit->reload = 0;
    unit->config = 0;

    unit->config  = unit->nr_timers;
    unit->config |= unit->irq_line << 3;
    unit->config |= 1 << 8;     /* separate interrupt */
    unit->config |= 1 << 9;     /* Disable timer freeze */


    for (i = 0; i < unit->nr_timers; i++) {
        GPTimer *timer = &unit->timers[i];

        timer->counter = 0;
        timer->reload = 0;
        timer->config = 0;
        ptimer_stop(timer->ptimer);
        ptimer_set_count(timer->ptimer, 0);
        ptimer_set_freq(timer->ptimer, unit->freq_hz);
    }
}

static int grlib_gptimer_init(SysBusDevice *dev)
{
    GPTimerUnit  *unit = FROM_SYSBUS(typeof(*unit), dev);
    unsigned int  i;

    assert(unit->nr_timers > 0);
    assert(unit->nr_timers <= GPTIMER_MAX_TIMERS);

    unit->timers = g_malloc0(sizeof unit->timers[0] * unit->nr_timers);

    for (i = 0; i < unit->nr_timers; i++) {
        GPTimer *timer = &unit->timers[i];

        timer->unit   = unit;
        timer->bh     = qemu_bh_new(grlib_gptimer_hit, timer);
        timer->ptimer = ptimer_init(timer->bh);
        timer->id     = i;

        /* One IRQ line for each timer */
        sysbus_init_irq(dev, &timer->irq);

        ptimer_set_freq(timer->ptimer, unit->freq_hz);
    }

    memory_region_init_io(&unit->iomem, &grlib_gptimer_ops, unit, "gptimer",
                          UNIT_REG_SIZE + GPTIMER_REG_SIZE * unit->nr_timers);

    sysbus_init_mmio(dev, &unit->iomem);
    return 0;
}

static Property grlib_gptimer_properties[] = {
    DEFINE_PROP_UINT32("frequency", GPTimerUnit, freq_hz,   40000000),
    DEFINE_PROP_UINT32("irq-line",  GPTimerUnit, irq_line,  8),
    DEFINE_PROP_UINT32("nr-timers", GPTimerUnit, nr_timers, 2),
    DEFINE_PROP_END_OF_LIST(),
};

static void grlib_gptimer_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = grlib_gptimer_init;
    dc->reset = grlib_gptimer_reset;
    dc->props = grlib_gptimer_properties;
}

static TypeInfo grlib_gptimer_info = {
    .name          = "grlib,gptimer",
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(GPTimerUnit),
    .class_init    = grlib_gptimer_class_init,
};

static void grlib_gptimer_register_types(void)
{
    type_register_static(&grlib_gptimer_info);
}

type_init(grlib_gptimer_register_types)
Commit	Line	Data
0f3a4a01 FC	1	/*
	2	* QEMU GRLIB GPTimer Emulator
	3	*
	4	* Copyright (c) 2010-2011 AdaCore
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24
	25	#include "sysbus.h"
1de7afc9	26	#include "qemu/timer.h"
49d4d9b6	27	#include "ptimer.h"
0f3a4a01 FC	28
	29	#include "trace.h"
	30
	31	#define UNIT_REG_SIZE 16 /* Size of memory mapped regs for the unit */
	32	#define GPTIMER_REG_SIZE 16 /* Size of memory mapped regs for a GPTimer */
	33
	34	#define GPTIMER_MAX_TIMERS 8
	35
	36	/* GPTimer Config register fields */
	37	#define GPTIMER_ENABLE (1 << 0)
	38	#define GPTIMER_RESTART (1 << 1)
	39	#define GPTIMER_LOAD (1 << 2)
	40	#define GPTIMER_INT_ENABLE (1 << 3)
	41	#define GPTIMER_INT_PENDING (1 << 4)
	42	#define GPTIMER_CHAIN (1 << 5) /* Not supported */
	43	#define GPTIMER_DEBUG_HALT (1 << 6) /* Not supported */
	44
	45	/* Memory mapped register offsets */
	46	#define SCALER_OFFSET 0x00
	47	#define SCALER_RELOAD_OFFSET 0x04
	48	#define CONFIG_OFFSET 0x08
	49	#define COUNTER_OFFSET 0x00
	50	#define COUNTER_RELOAD_OFFSET 0x04
	51	#define TIMER_BASE 0x10
	52
	53	typedef struct GPTimer GPTimer;
	54	typedef struct GPTimerUnit GPTimerUnit;
	55
	56	struct GPTimer {
	57	QEMUBH *bh;
	58	struct ptimer_state *ptimer;
	59
	60	qemu_irq irq;
	61	int id;
	62	GPTimerUnit *unit;
	63
	64	/* registers */
	65	uint32_t counter;
	66	uint32_t reload;
	67	uint32_t config;
	68	};
	69
	70	struct GPTimerUnit {
	71	SysBusDevice busdev;
cde844fa	72	MemoryRegion iomem;
0f3a4a01 FC	73
	74	uint32_t nr_timers; /* Number of timers available */
	75	uint32_t freq_hz; /* System frequency */
	76	uint32_t irq_line; /* Base irq line */
	77
	78	GPTimer *timers;
	79
	80	/* registers */
	81	uint32_t scaler;
	82	uint32_t reload;
	83	uint32_t config;
	84	};
	85
	86	static void grlib_gptimer_enable(GPTimer *timer)
	87	{
	88	assert(timer != NULL);
	89
	90
	91	ptimer_stop(timer->ptimer);
	92
	93	if (!(timer->config & GPTIMER_ENABLE)) {
	94	/* Timer disabled */
	95	trace_grlib_gptimer_disabled(timer->id, timer->config);
	96	return;
	97	}
	98
	99	/* ptimer is triggered when the counter reach 0 but GPTimer is triggered at
	100	underflow. Set count + 1 to simulate the GPTimer behavior. */
	101
	102	trace_grlib_gptimer_enable(timer->id, timer->counter + 1);
	103
	104	ptimer_set_count(timer->ptimer, timer->counter + 1);
	105	ptimer_run(timer->ptimer, 1);
	106	}
	107
	108	static void grlib_gptimer_restart(GPTimer *timer)
	109	{
	110	assert(timer != NULL);
	111
	112	trace_grlib_gptimer_restart(timer->id, timer->reload);
	113
	114	timer->counter = timer->reload;
	115	grlib_gptimer_enable(timer);
	116	}
	117
	118	static void grlib_gptimer_set_scaler(GPTimerUnit *unit, uint32_t scaler)
	119	{
	120	int i = 0;
	121	uint32_t value = 0;
	122
	123	assert(unit != NULL);
	124
	125	if (scaler > 0) {
	126	value = unit->freq_hz / (scaler + 1);
	127	} else {
	128	value = unit->freq_hz;
	129	}
	130
	131	trace_grlib_gptimer_set_scaler(scaler, value);
	132
	133	for (i = 0; i < unit->nr_timers; i++) {
	134	ptimer_set_freq(unit->timers[i].ptimer, value);
	135	}
	136	}
137
138	static void grlib_gptimer_hit(void *opaque)
139	{
140	GPTimer *timer = opaque;
141	assert(timer != NULL);
142
143	trace_grlib_gptimer_hit(timer->id);
144
145	/* Timer expired */
146
147	if (timer->config & GPTIMER_INT_ENABLE) {
148	/* Set the pending bit (only unset by write in the config register) */
149	timer->config \|= GPTIMER_INT_PENDING;
150	qemu_irq_pulse(timer->irq);
151	}
152
153	if (timer->config & GPTIMER_RESTART) {
154	grlib_gptimer_restart(timer);
155	}
156	}
157
a8170e5e	158	static uint64_t grlib_gptimer_read(void *opaque, hwaddr addr,
cde844fa	159	unsigned size)
0f3a4a01 FC	160	{
0f3a4a01 FC	161	GPTimerUnit *unit = opaque;
a8170e5e	162	hwaddr timer_addr;
0f3a4a01 FC	163	int id;
	164	uint32_t value = 0;
	165
	166	addr &= 0xff;
	167
	168	/* Unit registers */
	169	switch (addr) {
	170	case SCALER_OFFSET:
b4548fcc	171	trace_grlib_gptimer_readl(-1, addr, unit->scaler);
0f3a4a01 FC	172	return unit->scaler;
	173
	174	case SCALER_RELOAD_OFFSET:
b4548fcc	175	trace_grlib_gptimer_readl(-1, addr, unit->reload);
0f3a4a01 FC	176	return unit->reload;
	177
	178	case CONFIG_OFFSET:
b4548fcc	179	trace_grlib_gptimer_readl(-1, addr, unit->config);
0f3a4a01 FC	180	return unit->config;
	181
	182	default:
	183	break;
	184	}
	185
	186	timer_addr = (addr % TIMER_BASE);
	187	id = (addr - TIMER_BASE) / TIMER_BASE;
	188
	189	if (id >= 0 && id < unit->nr_timers) {
	190
	191	/* GPTimer registers */
	192	switch (timer_addr) {
	193	case COUNTER_OFFSET:
	194	value = ptimer_get_count(unit->timers[id].ptimer);
b4548fcc	195	trace_grlib_gptimer_readl(id, addr, value);
0f3a4a01 FC	196	return value;
	197
	198	case COUNTER_RELOAD_OFFSET:
	199	value = unit->timers[id].reload;
b4548fcc	200	trace_grlib_gptimer_readl(id, addr, value);
0f3a4a01 FC	201	return value;
	202
	203	case CONFIG_OFFSET:
b4548fcc	204	trace_grlib_gptimer_readl(id, addr, unit->timers[id].config);
0f3a4a01 FC	205	return unit->timers[id].config;
	206
	207	default:
	208	break;
	209	}
	210
	211	}
	212
b4548fcc	213	trace_grlib_gptimer_readl(-1, addr, 0);
0f3a4a01 FC	214	return 0;
	215	}
	216
a8170e5e	217	static void grlib_gptimer_write(void *opaque, hwaddr addr,
cde844fa	218	uint64_t value, unsigned size)
0f3a4a01 FC	219	{
0f3a4a01 FC	220	GPTimerUnit *unit = opaque;
a8170e5e	221	hwaddr timer_addr;
0f3a4a01 FC	222	int id;
	223
	224	addr &= 0xff;
	225
	226	/* Unit registers */
	227	switch (addr) {
	228	case SCALER_OFFSET:
	229	value &= 0xFFFF; /* clean up the value */
	230	unit->scaler = value;
b4548fcc	231	trace_grlib_gptimer_writel(-1, addr, unit->scaler);
0f3a4a01 FC	232	return;
	233
	234	case SCALER_RELOAD_OFFSET:
	235	value &= 0xFFFF; /* clean up the value */
	236	unit->reload = value;
b4548fcc	237	trace_grlib_gptimer_writel(-1, addr, unit->reload);
0f3a4a01 FC	238	grlib_gptimer_set_scaler(unit, value);
	239	return;
	240
	241	case CONFIG_OFFSET:
	242	/* Read Only (disable timer freeze not supported) */
b4548fcc	243	trace_grlib_gptimer_writel(-1, addr, 0);
0f3a4a01 FC	244	return;
	245
	246	default:
	247	break;
	248	}
	249
	250	timer_addr = (addr % TIMER_BASE);
	251	id = (addr - TIMER_BASE) / TIMER_BASE;
	252
	253	if (id >= 0 && id < unit->nr_timers) {
	254
	255	/* GPTimer registers */
	256	switch (timer_addr) {
	257	case COUNTER_OFFSET:
b4548fcc	258	trace_grlib_gptimer_writel(id, addr, value);
0f3a4a01 FC	259	unit->timers[id].counter = value;
	260	grlib_gptimer_enable(&unit->timers[id]);
	261	return;
	262
	263	case COUNTER_RELOAD_OFFSET:
b4548fcc	264	trace_grlib_gptimer_writel(id, addr, value);
0f3a4a01 FC	265	unit->timers[id].reload = value;
	266	return;
	267
	268	case CONFIG_OFFSET:
b4548fcc	269	trace_grlib_gptimer_writel(id, addr, value);
0f3a4a01 FC	270
	271	if (value & GPTIMER_INT_PENDING) {
	272	/* clear pending bit */
	273	value &= ~GPTIMER_INT_PENDING;
	274	} else {
	275	/* keep pending bit */
	276	value \|= unit->timers[id].config & GPTIMER_INT_PENDING;
	277	}
	278
	279	unit->timers[id].config = value;
	280
	281	/* gptimer_restart calls gptimer_enable, so if "enable" and "load"
	282	bits are present, we just have to call restart. */
	283
	284	if (value & GPTIMER_LOAD) {
	285	grlib_gptimer_restart(&unit->timers[id]);
	286	} else if (value & GPTIMER_ENABLE) {
	287	grlib_gptimer_enable(&unit->timers[id]);
	288	}
	289
	290	/* These fields must always be read as 0 */
	291	value &= ~(GPTIMER_LOAD & GPTIMER_DEBUG_HALT);
	292
	293	unit->timers[id].config = value;
	294	return;
	295
	296	default:
	297	break;
	298	}
	299
	300	}
	301
b4548fcc	302	trace_grlib_gptimer_writel(-1, addr, value);
0f3a4a01 FC	303	}
0f3a4a01 FC	304
cde844fa AK	305	static const MemoryRegionOps grlib_gptimer_ops = {
	306	.read = grlib_gptimer_read,
	307	.write = grlib_gptimer_write,
	308	.endianness = DEVICE_NATIVE_ENDIAN,
	309	.valid = {
	310	.min_access_size = 4,
	311	.max_access_size = 4,
	312	},
0f3a4a01 FC	313	};
	314
	315	static void grlib_gptimer_reset(DeviceState *d)
	316	{
	317	GPTimerUnit *unit = container_of(d, GPTimerUnit, busdev.qdev);
	318	int i = 0;
	319
	320	assert(unit != NULL);
	321
	322	unit->scaler = 0;
	323	unit->reload = 0;
	324	unit->config = 0;
	325
	326	unit->config = unit->nr_timers;
	327	unit->config \|= unit->irq_line << 3;
	328	unit->config \|= 1 << 8; /* separate interrupt */
	329	unit->config \|= 1 << 9; /* Disable timer freeze */
	330
	331
	332	for (i = 0; i < unit->nr_timers; i++) {
	333	GPTimer *timer = &unit->timers[i];
	334
	335	timer->counter = 0;
	336	timer->reload = 0;
	337	timer->config = 0;
	338	ptimer_stop(timer->ptimer);
	339	ptimer_set_count(timer->ptimer, 0);
	340	ptimer_set_freq(timer->ptimer, unit->freq_hz);
	341	}
	342	}
	343
	344	static int grlib_gptimer_init(SysBusDevice *dev)
	345	{
	346	GPTimerUnit unit = FROM_SYSBUS(typeof(unit), dev);
	347	unsigned int i;
0f3a4a01 FC	348
	349	assert(unit->nr_timers > 0);
	350	assert(unit->nr_timers <= GPTIMER_MAX_TIMERS);
	351
7267c094	352	unit->timers = g_malloc0(sizeof unit->timers[0] * unit->nr_timers);
0f3a4a01 FC	353
	354	for (i = 0; i < unit->nr_timers; i++) {
	355	GPTimer *timer = &unit->timers[i];
	356
	357	timer->unit = unit;
	358	timer->bh = qemu_bh_new(grlib_gptimer_hit, timer);
	359	timer->ptimer = ptimer_init(timer->bh);
	360	timer->id = i;
	361
	362	/* One IRQ line for each timer */
	363	sysbus_init_irq(dev, &timer->irq);
	364
	365	ptimer_set_freq(timer->ptimer, unit->freq_hz);
	366	}
	367
cde844fa AK	368	memory_region_init_io(&unit->iomem, &grlib_gptimer_ops, unit, "gptimer",
cde844fa AK	369	UNIT_REG_SIZE + GPTIMER_REG_SIZE * unit->nr_timers);
0f3a4a01	370
750ecd44	371	sysbus_init_mmio(dev, &unit->iomem);
0f3a4a01 FC	372	return 0;
	373	}
	374
999e12bb AL	375	static Property grlib_gptimer_properties[] = {
	376	DEFINE_PROP_UINT32("frequency", GPTimerUnit, freq_hz, 40000000),
	377	DEFINE_PROP_UINT32("irq-line", GPTimerUnit, irq_line, 8),
	378	DEFINE_PROP_UINT32("nr-timers", GPTimerUnit, nr_timers, 2),
	379	DEFINE_PROP_END_OF_LIST(),
	380	};
	381
	382	static void grlib_gptimer_class_init(ObjectClass klass, void data)
	383	{
39bffca2	384	DeviceClass *dc = DEVICE_CLASS(klass);
999e12bb AL	385	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
	386
	387	k->init = grlib_gptimer_init;
39bffca2 AL	388	dc->reset = grlib_gptimer_reset;
39bffca2 AL	389	dc->props = grlib_gptimer_properties;
999e12bb AL	390	}
999e12bb AL	391
39bffca2 AL	392	static TypeInfo grlib_gptimer_info = {
	393	.name = "grlib,gptimer",
	394	.parent = TYPE_SYS_BUS_DEVICE,
	395	.instance_size = sizeof(GPTimerUnit),
	396	.class_init = grlib_gptimer_class_init,
0f3a4a01 FC	397	};
0f3a4a01 FC	398
83f7d43a	399	static void grlib_gptimer_register_types(void)
0f3a4a01	400	{
39bffca2	401	type_register_static(&grlib_gptimer_info);
0f3a4a01 FC	402	}
0f3a4a01 FC	403
83f7d43a	404	type_init(grlib_gptimer_register_types)