[qemu.git] / hw / exynos4210_pwm.c

/*
 * Samsung exynos4210 Pulse Width Modulation Timer
 *
 * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
 * All rights reserved.
 *
 * Evgeny Voevodin <[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 "sysbus.h"
#include "qemu/timer.h"
#include "qemu-common.h"
#include "ptimer.h"

#include "exynos4210.h"

//#define DEBUG_PWM

#ifdef DEBUG_PWM
#define DPRINTF(fmt, ...) \
        do { fprintf(stdout, "PWM: [%24s:%5d] " fmt, __func__, __LINE__, \
                ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while (0)
#endif

#define     EXYNOS4210_PWM_TIMERS_NUM      5
#define     EXYNOS4210_PWM_REG_MEM_SIZE    0x50

#define     TCFG0        0x0000
#define     TCFG1        0x0004
#define     TCON         0x0008
#define     TCNTB0       0x000C
#define     TCMPB0       0x0010
#define     TCNTO0       0x0014
#define     TCNTB1       0x0018
#define     TCMPB1       0x001C
#define     TCNTO1       0x0020
#define     TCNTB2       0x0024
#define     TCMPB2       0x0028
#define     TCNTO2       0x002C
#define     TCNTB3       0x0030
#define     TCMPB3       0x0034
#define     TCNTO3       0x0038
#define     TCNTB4       0x003C
#define     TCNTO4       0x0040
#define     TINT_CSTAT   0x0044

#define     TCNTB(x)    (0xC * (x))
#define     TCMPB(x)    (0xC * (x) + 1)
#define     TCNTO(x)    (0xC * (x) + 2)

#define GET_PRESCALER(reg, x) (((reg) & (0xFF << (8 * (x)))) >> 8 * (x))
#define GET_DIVIDER(reg, x) (1 << (((reg) & (0xF << (4 * (x)))) >> (4 * (x))))

/*
 * Attention! Timer4 doesn't have OUTPUT_INVERTER,
 * so Auto Reload bit is not accessible by macros!
 */
#define     TCON_TIMER_BASE(x)          (((x) ? 1 : 0) * 4 + 4 * (x))
#define     TCON_TIMER_START(x)         (1 << (TCON_TIMER_BASE(x) + 0))
#define     TCON_TIMER_MANUAL_UPD(x)    (1 << (TCON_TIMER_BASE(x) + 1))
#define     TCON_TIMER_OUTPUT_INV(x)    (1 << (TCON_TIMER_BASE(x) + 2))
#define     TCON_TIMER_AUTO_RELOAD(x)   (1 << (TCON_TIMER_BASE(x) + 3))
#define     TCON_TIMER4_AUTO_RELOAD     (1 << 22)

#define     TINT_CSTAT_STATUS(x)        (1 << (5 + (x)))
#define     TINT_CSTAT_ENABLE(x)        (1 << (x))

/* timer struct */
typedef struct {
    uint32_t    id;             /* timer id */
    qemu_irq    irq;            /* local timer irq */
    uint32_t    freq;           /* timer frequency */

    /* use ptimer.c to represent count down timer */
    ptimer_state *ptimer;       /* timer  */

    /* registers */
    uint32_t    reg_tcntb;      /* counter register buffer */
    uint32_t    reg_tcmpb;      /* compare register buffer */

    struct Exynos4210PWMState *parent;

} Exynos4210PWM;


typedef struct Exynos4210PWMState {
    SysBusDevice busdev;
    MemoryRegion iomem;

    uint32_t    reg_tcfg[2];
    uint32_t    reg_tcon;
    uint32_t    reg_tint_cstat;

    Exynos4210PWM timer[EXYNOS4210_PWM_TIMERS_NUM];

} Exynos4210PWMState;

/*** VMState ***/
static const VMStateDescription vmstate_exynos4210_pwm = {
    .name = "exynos4210.pwm.pwm",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(id, Exynos4210PWM),
        VMSTATE_UINT32(freq, Exynos4210PWM),
        VMSTATE_PTIMER(ptimer, Exynos4210PWM),
        VMSTATE_UINT32(reg_tcntb, Exynos4210PWM),
        VMSTATE_UINT32(reg_tcmpb, Exynos4210PWM),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_exynos4210_pwm_state = {
    .name = "exynos4210.pwm",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32_ARRAY(reg_tcfg, Exynos4210PWMState, 2),
        VMSTATE_UINT32(reg_tcon, Exynos4210PWMState),
        VMSTATE_UINT32(reg_tint_cstat, Exynos4210PWMState),
        VMSTATE_STRUCT_ARRAY(timer, Exynos4210PWMState,
            EXYNOS4210_PWM_TIMERS_NUM, 0,
        vmstate_exynos4210_pwm, Exynos4210PWM),
        VMSTATE_END_OF_LIST()
    }
};

/*
 * PWM update frequency
 */
static void exynos4210_pwm_update_freq(Exynos4210PWMState *s, uint32_t id)
{
    uint32_t freq;
    freq = s->timer[id].freq;
    if (id > 1) {
        s->timer[id].freq = 24000000 /
        ((GET_PRESCALER(s->reg_tcfg[0], 1) + 1) *
                (GET_DIVIDER(s->reg_tcfg[1], id)));
    } else {
        s->timer[id].freq = 24000000 /
        ((GET_PRESCALER(s->reg_tcfg[0], 0) + 1) *
                (GET_DIVIDER(s->reg_tcfg[1], id)));
    }

    if (freq != s->timer[id].freq) {
        ptimer_set_freq(s->timer[id].ptimer, s->timer[id].freq);
        DPRINTF("freq=%dHz\n", s->timer[id].freq);
    }
}

/*
 * Counter tick handler
 */
static void exynos4210_pwm_tick(void *opaque)
{
    Exynos4210PWM *s = (Exynos4210PWM *)opaque;
    Exynos4210PWMState *p = (Exynos4210PWMState *)s->parent;
    uint32_t id = s->id;
    bool cmp;

    DPRINTF("timer %d tick\n", id);

    /* set irq status */
    p->reg_tint_cstat |= TINT_CSTAT_STATUS(id);

    /* raise IRQ */
    if (p->reg_tint_cstat & TINT_CSTAT_ENABLE(id)) {
        DPRINTF("timer %d IRQ\n", id);
        qemu_irq_raise(p->timer[id].irq);
    }

    /* reload timer */
    if (id != 4) {
        cmp = p->reg_tcon & TCON_TIMER_AUTO_RELOAD(id);
    } else {
        cmp = p->reg_tcon & TCON_TIMER4_AUTO_RELOAD;
    }

    if (cmp) {
        DPRINTF("auto reload timer %d count to %x\n", id,
                p->timer[id].reg_tcntb);
        ptimer_set_count(p->timer[id].ptimer, p->timer[id].reg_tcntb);
        ptimer_run(p->timer[id].ptimer, 1);
    } else {
        /* stop timer, set status to STOP, see Basic Timer Operation */
        p->reg_tcon &= ~TCON_TIMER_START(id);
        ptimer_stop(p->timer[id].ptimer);
    }
}

/*
 * PWM Read
 */
static uint64_t exynos4210_pwm_read(void *opaque, hwaddr offset,
        unsigned size)
{
    Exynos4210PWMState *s = (Exynos4210PWMState *)opaque;
    uint32_t value = 0;
    int index;

    switch (offset) {
    case TCFG0: case TCFG1:
        index = (offset - TCFG0) >> 2;
        value = s->reg_tcfg[index];
        break;

    case TCON:
        value = s->reg_tcon;
        break;

    case TCNTB0: case TCNTB1:
    case TCNTB2: case TCNTB3: case TCNTB4:
        index = (offset - TCNTB0) / 0xC;
        value = s->timer[index].reg_tcntb;
        break;

    case TCMPB0: case TCMPB1:
    case TCMPB2: case TCMPB3:
        index = (offset - TCMPB0) / 0xC;
        value = s->timer[index].reg_tcmpb;
        break;

    case TCNTO0: case TCNTO1:
    case TCNTO2: case TCNTO3: case TCNTO4:
        index = (offset == TCNTO4) ? 4 : (offset - TCNTO0) / 0xC;
        value = ptimer_get_count(s->timer[index].ptimer);
        break;

    case TINT_CSTAT:
        value = s->reg_tint_cstat;
        break;

    default:
        fprintf(stderr,
                "[exynos4210.pwm: bad read offset " TARGET_FMT_plx "]\n",
                offset);
        break;
    }
    return value;
}

/*
 * PWM Write
 */
static void exynos4210_pwm_write(void *opaque, hwaddr offset,
        uint64_t value, unsigned size)
{
    Exynos4210PWMState *s = (Exynos4210PWMState *)opaque;
    int index;
    uint32_t new_val;
    int i;

    switch (offset) {
    case TCFG0: case TCFG1:
        index = (offset - TCFG0) >> 2;
        s->reg_tcfg[index] = value;

        /* update timers frequencies */
        for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
            exynos4210_pwm_update_freq(s, s->timer[i].id);
        }
        break;

    case TCON:
        for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
            if ((value & TCON_TIMER_MANUAL_UPD(i)) >
            (s->reg_tcon & TCON_TIMER_MANUAL_UPD(i))) {
                /*
                 * TCNTB and TCMPB are loaded into TCNT and TCMP.
                 * Update timers.
                 */

                /* this will start timer to run, this ok, because
                 * during processing start bit timer will be stopped
                 * if needed */
                ptimer_set_count(s->timer[i].ptimer, s->timer[i].reg_tcntb);
                DPRINTF("set timer %d count to %x\n", i,
                        s->timer[i].reg_tcntb);
            }

            if ((value & TCON_TIMER_START(i)) >
            (s->reg_tcon & TCON_TIMER_START(i))) {
                /* changed to start */
                ptimer_run(s->timer[i].ptimer, 1);
                DPRINTF("run timer %d\n", i);
            }

            if ((value & TCON_TIMER_START(i)) <
                    (s->reg_tcon & TCON_TIMER_START(i))) {
                /* changed to stop */
                ptimer_stop(s->timer[i].ptimer);
                DPRINTF("stop timer %d\n", i);
            }
        }
        s->reg_tcon = value;
        break;

    case TCNTB0: case TCNTB1:
    case TCNTB2: case TCNTB3: case TCNTB4:
        index = (offset - TCNTB0) / 0xC;
        s->timer[index].reg_tcntb = value;
        break;

    case TCMPB0: case TCMPB1:
    case TCMPB2: case TCMPB3:
        index = (offset - TCMPB0) / 0xC;
        s->timer[index].reg_tcmpb = value;
        break;

    case TINT_CSTAT:
        new_val = (s->reg_tint_cstat & 0x3E0) + (0x1F & value);
        new_val &= ~(0x3E0 & value);

        for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
            if ((new_val & TINT_CSTAT_STATUS(i)) <
                    (s->reg_tint_cstat & TINT_CSTAT_STATUS(i))) {
                qemu_irq_lower(s->timer[i].irq);
            }
        }

        s->reg_tint_cstat = new_val;
        break;

    default:
        fprintf(stderr,
                "[exynos4210.pwm: bad write offset " TARGET_FMT_plx "]\n",
                offset);
        break;

    }
}

/*
 * Set default values to timer fields and registers
 */
static void exynos4210_pwm_reset(DeviceState *d)
{
    Exynos4210PWMState *s = (Exynos4210PWMState *)d;
    int i;
    s->reg_tcfg[0] = 0x0101;
    s->reg_tcfg[1] = 0x0;
    s->reg_tcon = 0;
    s->reg_tint_cstat = 0;
    for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
        s->timer[i].reg_tcmpb = 0;
        s->timer[i].reg_tcntb = 0;

        exynos4210_pwm_update_freq(s, s->timer[i].id);
        ptimer_stop(s->timer[i].ptimer);
    }
}

static const MemoryRegionOps exynos4210_pwm_ops = {
    .read = exynos4210_pwm_read,
    .write = exynos4210_pwm_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

/*
 * PWM timer initialization
 */
static int exynos4210_pwm_init(SysBusDevice *dev)
{
    Exynos4210PWMState *s = FROM_SYSBUS(Exynos4210PWMState, dev);
    int i;
    QEMUBH *bh;

    for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
        bh = qemu_bh_new(exynos4210_pwm_tick, &s->timer[i]);
        sysbus_init_irq(dev, &s->timer[i].irq);
        s->timer[i].ptimer = ptimer_init(bh);
        s->timer[i].id = i;
        s->timer[i].parent = s;
    }

    memory_region_init_io(&s->iomem, &exynos4210_pwm_ops, s, "exynos4210-pwm",
            EXYNOS4210_PWM_REG_MEM_SIZE);
    sysbus_init_mmio(dev, &s->iomem);

    return 0;
}

static void exynos4210_pwm_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = exynos4210_pwm_init;
    dc->reset = exynos4210_pwm_reset;
    dc->vmsd = &vmstate_exynos4210_pwm_state;
}

static const TypeInfo exynos4210_pwm_info = {
    .name          = "exynos4210.pwm",
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(Exynos4210PWMState),
    .class_init    = exynos4210_pwm_class_init,
};

static void exynos4210_pwm_register_types(void)
{
    type_register_static(&exynos4210_pwm_info);
}

type_init(exynos4210_pwm_register_types)
Commit	Line	Data
62db8bf3 EV	1	/*
	2	* Samsung exynos4210 Pulse Width Modulation Timer
	3	*
	4	* Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
	5	* All rights reserved.
	6	*
	7	* Evgeny Voevodin <[email protected]>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	17	* See the GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, see <http://www.gnu.org/licenses/>.
	21	*/
	22
	23	#include "sysbus.h"
1de7afc9	24	#include "qemu/timer.h"
62db8bf3 EV	25	#include "qemu-common.h"
	26	#include "ptimer.h"
	27
	28	#include "exynos4210.h"
	29
	30	//#define DEBUG_PWM
	31
	32	#ifdef DEBUG_PWM
	33	#define DPRINTF(fmt, ...) \
	34	do { fprintf(stdout, "PWM: [%24s:%5d] " fmt, __func__, __LINE__, \
	35	## __VA_ARGS__); } while (0)
	36	#else
	37	#define DPRINTF(fmt, ...) do {} while (0)
	38	#endif
	39
	40	#define EXYNOS4210_PWM_TIMERS_NUM 5
	41	#define EXYNOS4210_PWM_REG_MEM_SIZE 0x50
	42
	43	#define TCFG0 0x0000
	44	#define TCFG1 0x0004
	45	#define TCON 0x0008
	46	#define TCNTB0 0x000C
	47	#define TCMPB0 0x0010
	48	#define TCNTO0 0x0014
	49	#define TCNTB1 0x0018
	50	#define TCMPB1 0x001C
	51	#define TCNTO1 0x0020
	52	#define TCNTB2 0x0024
	53	#define TCMPB2 0x0028
	54	#define TCNTO2 0x002C
	55	#define TCNTB3 0x0030
	56	#define TCMPB3 0x0034
	57	#define TCNTO3 0x0038
	58	#define TCNTB4 0x003C
	59	#define TCNTO4 0x0040
	60	#define TINT_CSTAT 0x0044
	61
	62	#define TCNTB(x) (0xC * (x))
	63	#define TCMPB(x) (0xC * (x) + 1)
	64	#define TCNTO(x) (0xC * (x) + 2)
	65
	66	#define GET_PRESCALER(reg, x) (((reg) & (0xFF << (8 * (x)))) >> 8 * (x))
	67	#define GET_DIVIDER(reg, x) (1 << (((reg) & (0xF << (4 * (x)))) >> (4 * (x))))
	68
	69	/*
	70	* Attention! Timer4 doesn't have OUTPUT_INVERTER,
	71	* so Auto Reload bit is not accessible by macros!
	72	*/
	73	#define TCON_TIMER_BASE(x) (((x) ? 1 : 0) * 4 + 4 * (x))
	74	#define TCON_TIMER_START(x) (1 << (TCON_TIMER_BASE(x) + 0))
	75	#define TCON_TIMER_MANUAL_UPD(x) (1 << (TCON_TIMER_BASE(x) + 1))
	76	#define TCON_TIMER_OUTPUT_INV(x) (1 << (TCON_TIMER_BASE(x) + 2))
	77	#define TCON_TIMER_AUTO_RELOAD(x) (1 << (TCON_TIMER_BASE(x) + 3))
	78	#define TCON_TIMER4_AUTO_RELOAD (1 << 22)
	79
	80	#define TINT_CSTAT_STATUS(x) (1 << (5 + (x)))
	81	#define TINT_CSTAT_ENABLE(x) (1 << (x))
	82
	83	/* timer struct */
	84	typedef struct {
	85	uint32_t id; /* timer id */
	86	qemu_irq irq; /* local timer irq */
	87	uint32_t freq; /* timer frequency */
	88
89	/* use ptimer.c to represent count down timer */
90	ptimer_state ptimer; / timer */
91
92	/* registers */
93	uint32_t reg_tcntb; /* counter register buffer */
94	uint32_t reg_tcmpb; /* compare register buffer */
95
96	struct Exynos4210PWMState *parent;
97
98	} Exynos4210PWM;
99
100
101	typedef struct Exynos4210PWMState {
102	SysBusDevice busdev;
103	MemoryRegion iomem;
104
105	uint32_t reg_tcfg[2];
106	uint32_t reg_tcon;
107	uint32_t reg_tint_cstat;
108
109	Exynos4210PWM timer[EXYNOS4210_PWM_TIMERS_NUM];
110
111	} Exynos4210PWMState;
112
113	/* VMState */
114	static const VMStateDescription vmstate_exynos4210_pwm = {
115	.name = "exynos4210.pwm.pwm",
116	.version_id = 1,
117	.minimum_version_id = 1,
118	.minimum_version_id_old = 1,
119	.fields = (VMStateField[]) {
120	VMSTATE_UINT32(id, Exynos4210PWM),
121	VMSTATE_UINT32(freq, Exynos4210PWM),
122	VMSTATE_PTIMER(ptimer, Exynos4210PWM),
123	VMSTATE_UINT32(reg_tcntb, Exynos4210PWM),
124	VMSTATE_UINT32(reg_tcmpb, Exynos4210PWM),
125	VMSTATE_END_OF_LIST()
126	}
127	};
128
129	static const VMStateDescription vmstate_exynos4210_pwm_state = {
130	.name = "exynos4210.pwm",
131	.version_id = 1,
132	.minimum_version_id = 1,
133	.minimum_version_id_old = 1,
134	.fields = (VMStateField[]) {
135	VMSTATE_UINT32_ARRAY(reg_tcfg, Exynos4210PWMState, 2),
136	VMSTATE_UINT32(reg_tcon, Exynos4210PWMState),
137	VMSTATE_UINT32(reg_tint_cstat, Exynos4210PWMState),
138	VMSTATE_STRUCT_ARRAY(timer, Exynos4210PWMState,
139	EXYNOS4210_PWM_TIMERS_NUM, 0,
140	vmstate_exynos4210_pwm, Exynos4210PWM),
141	VMSTATE_END_OF_LIST()
142	}
143	};
144
145	/*
146	* PWM update frequency
147	*/
148	static void exynos4210_pwm_update_freq(Exynos4210PWMState *s, uint32_t id)
149	{
150	uint32_t freq;
151	freq = s->timer[id].freq;
152	if (id > 1) {
153	s->timer[id].freq = 24000000 /
154	((GET_PRESCALER(s->reg_tcfg[0], 1) + 1) *
155	(GET_DIVIDER(s->reg_tcfg[1], id)));
156	} else {
157	s->timer[id].freq = 24000000 /
158	((GET_PRESCALER(s->reg_tcfg[0], 0) + 1) *
159	(GET_DIVIDER(s->reg_tcfg[1], id)));
160	}
161
162	if (freq != s->timer[id].freq) {
163	ptimer_set_freq(s->timer[id].ptimer, s->timer[id].freq);
164	DPRINTF("freq=%dHz\n", s->timer[id].freq);
165	}
166	}
167
168	/*
169	* Counter tick handler
170	*/
171	static void exynos4210_pwm_tick(void *opaque)
172	{
173	Exynos4210PWM s = (Exynos4210PWM )opaque;
174	Exynos4210PWMState p = (Exynos4210PWMState )s->parent;
175	uint32_t id = s->id;
176	bool cmp;
177
178	DPRINTF("timer %d tick\n", id);
179
180	/* set irq status */
181	p->reg_tint_cstat \|= TINT_CSTAT_STATUS(id);
182
183	/* raise IRQ */
184	if (p->reg_tint_cstat & TINT_CSTAT_ENABLE(id)) {
185	DPRINTF("timer %d IRQ\n", id);
186	qemu_irq_raise(p->timer[id].irq);
187	}
188
189	/* reload timer */
190	if (id != 4) {
191	cmp = p->reg_tcon & TCON_TIMER_AUTO_RELOAD(id);
192	} else {
193	cmp = p->reg_tcon & TCON_TIMER4_AUTO_RELOAD;
194	}
195
196	if (cmp) {
197	DPRINTF("auto reload timer %d count to %x\n", id,
198	p->timer[id].reg_tcntb);
199	ptimer_set_count(p->timer[id].ptimer, p->timer[id].reg_tcntb);
200	ptimer_run(p->timer[id].ptimer, 1);
201	} else {
202	/* stop timer, set status to STOP, see Basic Timer Operation */
b631bc37	203	p->reg_tcon &= ~TCON_TIMER_START(id);
62db8bf3 EV	204	ptimer_stop(p->timer[id].ptimer);
	205	}
	206	}
	207
	208	/*
	209	* PWM Read
	210	*/
a8170e5e	211	static uint64_t exynos4210_pwm_read(void *opaque, hwaddr offset,
62db8bf3 EV	212	unsigned size)
	213	{
	214	Exynos4210PWMState s = (Exynos4210PWMState )opaque;
	215	uint32_t value = 0;
	216	int index;
	217
	218	switch (offset) {
	219	case TCFG0: case TCFG1:
	220	index = (offset - TCFG0) >> 2;
	221	value = s->reg_tcfg[index];
	222	break;
	223
	224	case TCON:
	225	value = s->reg_tcon;
	226	break;
	227
	228	case TCNTB0: case TCNTB1:
	229	case TCNTB2: case TCNTB3: case TCNTB4:
	230	index = (offset - TCNTB0) / 0xC;
	231	value = s->timer[index].reg_tcntb;
	232	break;
	233
	234	case TCMPB0: case TCMPB1:
	235	case TCMPB2: case TCMPB3:
	236	index = (offset - TCMPB0) / 0xC;
	237	value = s->timer[index].reg_tcmpb;
	238	break;
	239
	240	case TCNTO0: case TCNTO1:
	241	case TCNTO2: case TCNTO3: case TCNTO4:
	242	index = (offset == TCNTO4) ? 4 : (offset - TCNTO0) / 0xC;
	243	value = ptimer_get_count(s->timer[index].ptimer);
	244	break;
	245
	246	case TINT_CSTAT:
	247	value = s->reg_tint_cstat;
	248	break;
	249
	250	default:
	251	fprintf(stderr,
	252	"[exynos4210.pwm: bad read offset " TARGET_FMT_plx "]\n",
	253	offset);
	254	break;
	255	}
	256	return value;
	257	}
	258
	259	/*
	260	* PWM Write
	261	*/
a8170e5e	262	static void exynos4210_pwm_write(void *opaque, hwaddr offset,
62db8bf3 EV	263	uint64_t value, unsigned size)
	264	{
	265	Exynos4210PWMState s = (Exynos4210PWMState )opaque;
	266	int index;
	267	uint32_t new_val;
	268	int i;
	269
	270	switch (offset) {
	271	case TCFG0: case TCFG1:
	272	index = (offset - TCFG0) >> 2;
	273	s->reg_tcfg[index] = value;
	274
	275	/* update timers frequencies */
	276	for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
	277	exynos4210_pwm_update_freq(s, s->timer[i].id);
	278	}
	279	break;
	280
	281	case TCON:
	282	for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
	283	if ((value & TCON_TIMER_MANUAL_UPD(i)) >
	284	(s->reg_tcon & TCON_TIMER_MANUAL_UPD(i))) {
	285	/*
	286	* TCNTB and TCMPB are loaded into TCNT and TCMP.
	287	* Update timers.
	288	*/
	289
	290	/* this will start timer to run, this ok, because
	291	* during processing start bit timer will be stopped
	292	* if needed */
	293	ptimer_set_count(s->timer[i].ptimer, s->timer[i].reg_tcntb);
	294	DPRINTF("set timer %d count to %x\n", i,
	295	s->timer[i].reg_tcntb);
	296	}
	297
	298	if ((value & TCON_TIMER_START(i)) >
	299	(s->reg_tcon & TCON_TIMER_START(i))) {
	300	/* changed to start */
	301	ptimer_run(s->timer[i].ptimer, 1);
	302	DPRINTF("run timer %d\n", i);
	303	}
	304
	305	if ((value & TCON_TIMER_START(i)) <
	306	(s->reg_tcon & TCON_TIMER_START(i))) {
	307	/* changed to stop */
	308	ptimer_stop(s->timer[i].ptimer);
	309	DPRINTF("stop timer %d\n", i);
	310	}
	311	}
	312	s->reg_tcon = value;
	313	break;
	314
	315	case TCNTB0: case TCNTB1:
	316	case TCNTB2: case TCNTB3: case TCNTB4:
	317	index = (offset - TCNTB0) / 0xC;
	318	s->timer[index].reg_tcntb = value;
	319	break;
	320
	321	case TCMPB0: case TCMPB1:
	322	case TCMPB2: case TCMPB3:
	323	index = (offset - TCMPB0) / 0xC;
	324	s->timer[index].reg_tcmpb = value;
	325	break;
	326
327	case TINT_CSTAT:
328	new_val = (s->reg_tint_cstat & 0x3E0) + (0x1F & value);
329	new_val &= ~(0x3E0 & value);
330
331	for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
332	if ((new_val & TINT_CSTAT_STATUS(i)) <
333	(s->reg_tint_cstat & TINT_CSTAT_STATUS(i))) {
334	qemu_irq_lower(s->timer[i].irq);
335	}
336	}
337
338	s->reg_tint_cstat = new_val;
339	break;
340
341	default:
342	fprintf(stderr,
343	"[exynos4210.pwm: bad write offset " TARGET_FMT_plx "]\n",
344	offset);
345	break;
346
347	}
348	}
349
350	/*
351	* Set default values to timer fields and registers
352	*/
353	static void exynos4210_pwm_reset(DeviceState *d)
354	{
355	Exynos4210PWMState s = (Exynos4210PWMState )d;
356	int i;
357	s->reg_tcfg[0] = 0x0101;
358	s->reg_tcfg[1] = 0x0;
359	s->reg_tcon = 0;
360	s->reg_tint_cstat = 0;
361	for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
362	s->timer[i].reg_tcmpb = 0;
363	s->timer[i].reg_tcntb = 0;
364
365	exynos4210_pwm_update_freq(s, s->timer[i].id);
366	ptimer_stop(s->timer[i].ptimer);
367	}
368	}
369
370	static const MemoryRegionOps exynos4210_pwm_ops = {
371	.read = exynos4210_pwm_read,
372	.write = exynos4210_pwm_write,
373	.endianness = DEVICE_NATIVE_ENDIAN,
374	};
375
376	/*
377	* PWM timer initialization
378	*/
379	static int exynos4210_pwm_init(SysBusDevice *dev)
380	{
381	Exynos4210PWMState *s = FROM_SYSBUS(Exynos4210PWMState, dev);
382	int i;
383	QEMUBH *bh;
384
385	for (i = 0; i < EXYNOS4210_PWM_TIMERS_NUM; i++) {
386	bh = qemu_bh_new(exynos4210_pwm_tick, &s->timer[i]);
387	sysbus_init_irq(dev, &s->timer[i].irq);
388	s->timer[i].ptimer = ptimer_init(bh);
389	s->timer[i].id = i;
390	s->timer[i].parent = s;
391	}
392
393	memory_region_init_io(&s->iomem, &exynos4210_pwm_ops, s, "exynos4210-pwm",
394	EXYNOS4210_PWM_REG_MEM_SIZE);
395	sysbus_init_mmio(dev, &s->iomem);
396
397	return 0;
398	}
399
400	static void exynos4210_pwm_class_init(ObjectClass klass, void data)
401	{
402	DeviceClass *dc = DEVICE_CLASS(klass);
403	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
404
405	k->init = exynos4210_pwm_init;
406	dc->reset = exynos4210_pwm_reset;
407	dc->vmsd = &vmstate_exynos4210_pwm_state;
408	}
409
8c43a6f0	410	static const TypeInfo exynos4210_pwm_info = {
62db8bf3 EV	411	.name = "exynos4210.pwm",
	412	.parent = TYPE_SYS_BUS_DEVICE,
	413	.instance_size = sizeof(Exynos4210PWMState),
	414	.class_init = exynos4210_pwm_class_init,
	415	};
	416
	417	static void exynos4210_pwm_register_types(void)
	418	{
	419	type_register_static(&exynos4210_pwm_info);
	420	}
	421
	422	type_init(exynos4210_pwm_register_types)