[qemu.git] / hw / exynos4210_i2c.c

/*
 *  Exynos4210 I2C Bus Serial Interface Emulation
 *
 *  Copyright (C) 2012 Samsung Electronics Co Ltd.
 *    Maksim Kozlov, <[email protected]>
 *    Igor Mitsyanko, <[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-timer.h"
#include "sysbus.h"
#include "i2c.h"

#ifndef EXYNOS4_I2C_DEBUG
#define EXYNOS4_I2C_DEBUG                 0
#endif

#define TYPE_EXYNOS4_I2C                  "exynos4210.i2c"
#define EXYNOS4_I2C(obj)                  \
    OBJECT_CHECK(Exynos4210I2CState, (obj), TYPE_EXYNOS4_I2C)

/* Exynos4210 I2C memory map */
#define EXYNOS4_I2C_MEM_SIZE              0x14
#define I2CCON_ADDR                       0x00  /* control register */
#define I2CSTAT_ADDR                      0x04  /* control/status register */
#define I2CADD_ADDR                       0x08  /* address register */
#define I2CDS_ADDR                        0x0c  /* data shift register */
#define I2CLC_ADDR                        0x10  /* line control register */

#define I2CCON_ACK_GEN                    (1 << 7)
#define I2CCON_INTRS_EN                   (1 << 5)
#define I2CCON_INT_PEND                   (1 << 4)

#define EXYNOS4_I2C_MODE(reg)             (((reg) >> 6) & 3)
#define I2C_IN_MASTER_MODE(reg)           (((reg) >> 6) & 2)
#define I2CMODE_MASTER_Rx                 0x2
#define I2CMODE_MASTER_Tx                 0x3
#define I2CSTAT_LAST_BIT                  (1 << 0)
#define I2CSTAT_OUTPUT_EN                 (1 << 4)
#define I2CSTAT_START_BUSY                (1 << 5)


#if EXYNOS4_I2C_DEBUG
#define DPRINT(fmt, args...)              \
    do { fprintf(stderr, "QEMU I2C: "fmt, ## args); } while (0)

static const char *exynos4_i2c_get_regname(unsigned offset)
{
    switch (offset) {
    case I2CCON_ADDR:
        return "I2CCON";
    case I2CSTAT_ADDR:
        return "I2CSTAT";
    case I2CADD_ADDR:
        return "I2CADD";
    case I2CDS_ADDR:
        return "I2CDS";
    case I2CLC_ADDR:
        return "I2CLC";
    default:
        return "[?]";
    }
}

#else
#define DPRINT(fmt, args...)              do { } while (0)
#endif

typedef struct Exynos4210I2CState {
    SysBusDevice busdev;
    MemoryRegion iomem;
    i2c_bus *bus;
    qemu_irq irq;

    uint8_t i2ccon;
    uint8_t i2cstat;
    uint8_t i2cadd;
    uint8_t i2cds;
    uint8_t i2clc;
    bool scl_free;
} Exynos4210I2CState;

static inline void exynos4210_i2c_raise_interrupt(Exynos4210I2CState *s)
{
    if (s->i2ccon & I2CCON_INTRS_EN) {
        s->i2ccon |= I2CCON_INT_PEND;
        qemu_irq_raise(s->irq);
    }
}

static void exynos4210_i2c_data_receive(void *opaque)
{
    Exynos4210I2CState *s = (Exynos4210I2CState *)opaque;
    int ret;

    s->i2cstat &= ~I2CSTAT_LAST_BIT;
    s->scl_free = false;
    ret = i2c_recv(s->bus);
    if (ret < 0 && (s->i2ccon & I2CCON_ACK_GEN)) {
        s->i2cstat |= I2CSTAT_LAST_BIT;  /* Data is not acknowledged */
    } else {
        s->i2cds = ret;
    }
    exynos4210_i2c_raise_interrupt(s);
}

static void exynos4210_i2c_data_send(void *opaque)
{
    Exynos4210I2CState *s = (Exynos4210I2CState *)opaque;

    s->i2cstat &= ~I2CSTAT_LAST_BIT;
    s->scl_free = false;
    if (i2c_send(s->bus, s->i2cds) < 0 && (s->i2ccon & I2CCON_ACK_GEN)) {
        s->i2cstat |= I2CSTAT_LAST_BIT;
    }
    exynos4210_i2c_raise_interrupt(s);
}

static uint64_t exynos4210_i2c_read(void *opaque, target_phys_addr_t offset,
                                 unsigned size)
{
    Exynos4210I2CState *s = (Exynos4210I2CState *)opaque;
    uint8_t value;

    switch (offset) {
    case I2CCON_ADDR:
        value = s->i2ccon;
        break;
    case I2CSTAT_ADDR:
        value = s->i2cstat;
        break;
    case I2CADD_ADDR:
        value = s->i2cadd;
        break;
    case I2CDS_ADDR:
        value = s->i2cds;
        s->scl_free = true;
        if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Rx &&
               (s->i2cstat & I2CSTAT_START_BUSY) &&
               !(s->i2ccon & I2CCON_INT_PEND)) {
            exynos4210_i2c_data_receive(s);
        }
        break;
    case I2CLC_ADDR:
        value = s->i2clc;
        break;
    default:
        value = 0;
        DPRINT("ERROR: Bad read offset 0x%x\n", (unsigned int)offset);
        break;
    }

    DPRINT("read %s [0x%02x] -> 0x%02x\n", exynos4_i2c_get_regname(offset),
            (unsigned int)offset, value);
    return value;
}

static void exynos4210_i2c_write(void *opaque, target_phys_addr_t offset,
                              uint64_t value, unsigned size)
{
    Exynos4210I2CState *s = (Exynos4210I2CState *)opaque;
    uint8_t v = value & 0xff;

    DPRINT("write %s [0x%02x] <- 0x%02x\n", exynos4_i2c_get_regname(offset),
            (unsigned int)offset, v);

    switch (offset) {
    case I2CCON_ADDR:
        s->i2ccon = (v & ~I2CCON_INT_PEND) | (s->i2ccon & I2CCON_INT_PEND);
        if ((s->i2ccon & I2CCON_INT_PEND) && !(v & I2CCON_INT_PEND)) {
            s->i2ccon &= ~I2CCON_INT_PEND;
            qemu_irq_lower(s->irq);
            if (!(s->i2ccon & I2CCON_INTRS_EN)) {
                s->i2cstat &= ~I2CSTAT_START_BUSY;
            }

            if (s->i2cstat & I2CSTAT_START_BUSY) {
                if (s->scl_free) {
                    if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Tx) {
                        exynos4210_i2c_data_send(s);
                    } else if (EXYNOS4_I2C_MODE(s->i2cstat) ==
                            I2CMODE_MASTER_Rx) {
                        exynos4210_i2c_data_receive(s);
                    }
                } else {
                    s->i2ccon |= I2CCON_INT_PEND;
                    qemu_irq_raise(s->irq);
                }
            }
        }
        break;
    case I2CSTAT_ADDR:
        s->i2cstat =
                (s->i2cstat & I2CSTAT_START_BUSY) | (v & ~I2CSTAT_START_BUSY);

        if (!(s->i2cstat & I2CSTAT_OUTPUT_EN)) {
            s->i2cstat &= ~I2CSTAT_START_BUSY;
            s->scl_free = true;
            qemu_irq_lower(s->irq);
            break;
        }

        /* Nothing to do if in i2c slave mode */
        if (!I2C_IN_MASTER_MODE(s->i2cstat)) {
            break;
        }

        if (v & I2CSTAT_START_BUSY) {
            s->i2cstat &= ~I2CSTAT_LAST_BIT;
            s->i2cstat |= I2CSTAT_START_BUSY;    /* Line is busy */
            s->scl_free = false;

            /* Generate start bit and send slave address */
            if (i2c_start_transfer(s->bus, s->i2cds >> 1, s->i2cds & 0x1) &&
                    (s->i2ccon & I2CCON_ACK_GEN)) {
                s->i2cstat |= I2CSTAT_LAST_BIT;
            } else if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Rx) {
                exynos4210_i2c_data_receive(s);
            }
            exynos4210_i2c_raise_interrupt(s);
        } else {
            i2c_end_transfer(s->bus);
            if (!(s->i2ccon & I2CCON_INT_PEND)) {
                s->i2cstat &= ~I2CSTAT_START_BUSY;
            }
            s->scl_free = true;
        }
        break;
    case I2CADD_ADDR:
        if ((s->i2cstat & I2CSTAT_OUTPUT_EN) == 0) {
            s->i2cadd = v;
        }
        break;
    case I2CDS_ADDR:
        if (s->i2cstat & I2CSTAT_OUTPUT_EN) {
            s->i2cds = v;
            s->scl_free = true;
            if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Tx &&
                    (s->i2cstat & I2CSTAT_START_BUSY) &&
                    !(s->i2ccon & I2CCON_INT_PEND)) {
                exynos4210_i2c_data_send(s);
            }
        }
        break;
    case I2CLC_ADDR:
        s->i2clc = v;
        break;
    default:
        DPRINT("ERROR: Bad write offset 0x%x\n", (unsigned int)offset);
        break;
    }
}

static const MemoryRegionOps exynos4210_i2c_ops = {
    .read = exynos4210_i2c_read,
    .write = exynos4210_i2c_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static const VMStateDescription exynos4210_i2c_vmstate = {
    .name = TYPE_EXYNOS4_I2C,
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT8(i2ccon, Exynos4210I2CState),
        VMSTATE_UINT8(i2cstat, Exynos4210I2CState),
        VMSTATE_UINT8(i2cds, Exynos4210I2CState),
        VMSTATE_UINT8(i2cadd, Exynos4210I2CState),
        VMSTATE_UINT8(i2clc, Exynos4210I2CState),
        VMSTATE_BOOL(scl_free, Exynos4210I2CState),
        VMSTATE_END_OF_LIST()
    }
};

static void exynos4210_i2c_reset(DeviceState *d)
{
    Exynos4210I2CState *s = EXYNOS4_I2C(d);

    s->i2ccon  = 0x00;
    s->i2cstat = 0x00;
    s->i2cds   = 0xFF;
    s->i2clc   = 0x00;
    s->i2cadd  = 0xFF;
    s->scl_free = true;
}

static int exynos4210_i2c_realize(SysBusDevice *dev)
{
    Exynos4210I2CState *s = EXYNOS4_I2C(dev);

    memory_region_init_io(&s->iomem, &exynos4210_i2c_ops, s, TYPE_EXYNOS4_I2C,
                          EXYNOS4_I2C_MEM_SIZE);
    sysbus_init_mmio(dev, &s->iomem);
    sysbus_init_irq(dev, &s->irq);
    s->bus = i2c_init_bus(&dev->qdev, "i2c");
    return 0;
}

static void exynos4210_i2c_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *sbdc = SYS_BUS_DEVICE_CLASS(klass);

    dc->vmsd = &exynos4210_i2c_vmstate;
    dc->reset = exynos4210_i2c_reset;
    sbdc->init = exynos4210_i2c_realize;
}

static const TypeInfo exynos4210_i2c_type_info = {
    .name = TYPE_EXYNOS4_I2C,
    .parent = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(Exynos4210I2CState),
    .class_init = exynos4210_i2c_class_init,
};

static void exynos4210_i2c_register_types(void)
{
    type_register_static(&exynos4210_i2c_type_info);
}

type_init(exynos4210_i2c_register_types)
Commit	Line	Data
ffbbe7d0 MI	1	/*
	2	* Exynos4210 I2C Bus Serial Interface Emulation
	3	*
	4	* Copyright (C) 2012 Samsung Electronics Co Ltd.
	5	* Maksim Kozlov, <[email protected]>
	6	* Igor Mitsyanko, <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful, but WITHOUT
	14	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	15	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	16	* for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, see <http://www.gnu.org/licenses/>.
	20	*
	21	*/
	22
	23	#include "qemu-timer.h"
	24	#include "sysbus.h"
	25	#include "i2c.h"
	26
	27	#ifndef EXYNOS4_I2C_DEBUG
	28	#define EXYNOS4_I2C_DEBUG 0
	29	#endif
	30
	31	#define TYPE_EXYNOS4_I2C "exynos4210.i2c"
	32	#define EXYNOS4_I2C(obj) \
	33	OBJECT_CHECK(Exynos4210I2CState, (obj), TYPE_EXYNOS4_I2C)
	34
	35	/* Exynos4210 I2C memory map */
	36	#define EXYNOS4_I2C_MEM_SIZE 0x14
	37	#define I2CCON_ADDR 0x00 /* control register */
	38	#define I2CSTAT_ADDR 0x04 /* control/status register */
	39	#define I2CADD_ADDR 0x08 /* address register */
	40	#define I2CDS_ADDR 0x0c /* data shift register */
	41	#define I2CLC_ADDR 0x10 /* line control register */
	42
	43	#define I2CCON_ACK_GEN (1 << 7)
	44	#define I2CCON_INTRS_EN (1 << 5)
	45	#define I2CCON_INT_PEND (1 << 4)
	46
	47	#define EXYNOS4_I2C_MODE(reg) (((reg) >> 6) & 3)
	48	#define I2C_IN_MASTER_MODE(reg) (((reg) >> 6) & 2)
	49	#define I2CMODE_MASTER_Rx 0x2
	50	#define I2CMODE_MASTER_Tx 0x3
	51	#define I2CSTAT_LAST_BIT (1 << 0)
	52	#define I2CSTAT_OUTPUT_EN (1 << 4)
	53	#define I2CSTAT_START_BUSY (1 << 5)
	54
	55
	56	#if EXYNOS4_I2C_DEBUG
	57	#define DPRINT(fmt, args...) \
	58	do { fprintf(stderr, "QEMU I2C: "fmt, ## args); } while (0)
	59
	60	static const char *exynos4_i2c_get_regname(unsigned offset)
	61	{
	62	switch (offset) {
	63	case I2CCON_ADDR:
	64	return "I2CCON";
65	case I2CSTAT_ADDR:
66	return "I2CSTAT";
67	case I2CADD_ADDR:
68	return "I2CADD";
69	case I2CDS_ADDR:
70	return "I2CDS";
71	case I2CLC_ADDR:
72	return "I2CLC";
73	default:
74	return "[?]";
75	}
76	}
77
78	#else
79	#define DPRINT(fmt, args...) do { } while (0)
80	#endif
81
82	typedef struct Exynos4210I2CState {
83	SysBusDevice busdev;
84	MemoryRegion iomem;
85	i2c_bus *bus;
86	qemu_irq irq;
87
88	uint8_t i2ccon;
89	uint8_t i2cstat;
90	uint8_t i2cadd;
91	uint8_t i2cds;
92	uint8_t i2clc;
93	bool scl_free;
94	} Exynos4210I2CState;
95
96	static inline void exynos4210_i2c_raise_interrupt(Exynos4210I2CState *s)
97	{
98	if (s->i2ccon & I2CCON_INTRS_EN) {
99	s->i2ccon \|= I2CCON_INT_PEND;
100	qemu_irq_raise(s->irq);
101	}
102	}
103
104	static void exynos4210_i2c_data_receive(void *opaque)
105	{
106	Exynos4210I2CState s = (Exynos4210I2CState )opaque;
107	int ret;
108
109	s->i2cstat &= ~I2CSTAT_LAST_BIT;
110	s->scl_free = false;
111	ret = i2c_recv(s->bus);
112	if (ret < 0 && (s->i2ccon & I2CCON_ACK_GEN)) {
113	s->i2cstat \|= I2CSTAT_LAST_BIT; /* Data is not acknowledged */
114	} else {
115	s->i2cds = ret;
116	}
117	exynos4210_i2c_raise_interrupt(s);
118	}
119
120	static void exynos4210_i2c_data_send(void *opaque)
121	{
122	Exynos4210I2CState s = (Exynos4210I2CState )opaque;
123
124	s->i2cstat &= ~I2CSTAT_LAST_BIT;
125	s->scl_free = false;
126	if (i2c_send(s->bus, s->i2cds) < 0 && (s->i2ccon & I2CCON_ACK_GEN)) {
127	s->i2cstat \|= I2CSTAT_LAST_BIT;
128	}
129	exynos4210_i2c_raise_interrupt(s);
130	}
131
132	static uint64_t exynos4210_i2c_read(void *opaque, target_phys_addr_t offset,
133	unsigned size)
134	{
135	Exynos4210I2CState s = (Exynos4210I2CState )opaque;
136	uint8_t value;
137
138	switch (offset) {
139	case I2CCON_ADDR:
140	value = s->i2ccon;
141	break;
142	case I2CSTAT_ADDR:
143	value = s->i2cstat;
144	break;
145	case I2CADD_ADDR:
146	value = s->i2cadd;
147	break;
148	case I2CDS_ADDR:
149	value = s->i2cds;
150	s->scl_free = true;
151	if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Rx &&
152	(s->i2cstat & I2CSTAT_START_BUSY) &&
153	!(s->i2ccon & I2CCON_INT_PEND)) {
154	exynos4210_i2c_data_receive(s);
155	}
156	break;
157	case I2CLC_ADDR:
158	value = s->i2clc;
159	break;
160	default:
161	value = 0;
162	DPRINT("ERROR: Bad read offset 0x%x\n", (unsigned int)offset);
163	break;
164	}
165
166	DPRINT("read %s [0x%02x] -> 0x%02x\n", exynos4_i2c_get_regname(offset),
167	(unsigned int)offset, value);
168	return value;
169	}
170
171	static void exynos4210_i2c_write(void *opaque, target_phys_addr_t offset,
172	uint64_t value, unsigned size)
173	{
174	Exynos4210I2CState s = (Exynos4210I2CState )opaque;
175	uint8_t v = value & 0xff;
176
177	DPRINT("write %s [0x%02x] <- 0x%02x\n", exynos4_i2c_get_regname(offset),
178	(unsigned int)offset, v);
179
180	switch (offset) {
181	case I2CCON_ADDR:
182	s->i2ccon = (v & ~I2CCON_INT_PEND) \| (s->i2ccon & I2CCON_INT_PEND);
183	if ((s->i2ccon & I2CCON_INT_PEND) && !(v & I2CCON_INT_PEND)) {
184	s->i2ccon &= ~I2CCON_INT_PEND;
185	qemu_irq_lower(s->irq);
186	if (!(s->i2ccon & I2CCON_INTRS_EN)) {
187	s->i2cstat &= ~I2CSTAT_START_BUSY;
188	}
189
190	if (s->i2cstat & I2CSTAT_START_BUSY) {
191	if (s->scl_free) {
192	if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Tx) {
193	exynos4210_i2c_data_send(s);
194	} else if (EXYNOS4_I2C_MODE(s->i2cstat) ==
195	I2CMODE_MASTER_Rx) {
196	exynos4210_i2c_data_receive(s);
197	}
198	} else {
199	s->i2ccon \|= I2CCON_INT_PEND;
200	qemu_irq_raise(s->irq);
201	}
202	}
203	}
204	break;
205	case I2CSTAT_ADDR:
206	s->i2cstat =
207	(s->i2cstat & I2CSTAT_START_BUSY) \| (v & ~I2CSTAT_START_BUSY);
208
209	if (!(s->i2cstat & I2CSTAT_OUTPUT_EN)) {
210	s->i2cstat &= ~I2CSTAT_START_BUSY;
211	s->scl_free = true;
212	qemu_irq_lower(s->irq);
213	break;
214	}
215
216	/* Nothing to do if in i2c slave mode */
217	if (!I2C_IN_MASTER_MODE(s->i2cstat)) {
218	break;
219	}
220
221	if (v & I2CSTAT_START_BUSY) {
222	s->i2cstat &= ~I2CSTAT_LAST_BIT;
223	s->i2cstat \|= I2CSTAT_START_BUSY; /* Line is busy */
224	s->scl_free = false;
225
226	/* Generate start bit and send slave address */
227	if (i2c_start_transfer(s->bus, s->i2cds >> 1, s->i2cds & 0x1) &&
228	(s->i2ccon & I2CCON_ACK_GEN)) {
229	s->i2cstat \|= I2CSTAT_LAST_BIT;
230	} else if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Rx) {
231	exynos4210_i2c_data_receive(s);
232	}
233	exynos4210_i2c_raise_interrupt(s);
234	} else {
235	i2c_end_transfer(s->bus);
236	if (!(s->i2ccon & I2CCON_INT_PEND)) {
237	s->i2cstat &= ~I2CSTAT_START_BUSY;
238	}
239	s->scl_free = true;
240	}
241	break;
242	case I2CADD_ADDR:
243	if ((s->i2cstat & I2CSTAT_OUTPUT_EN) == 0) {
244	s->i2cadd = v;
245	}
246	break;
247	case I2CDS_ADDR:
248	if (s->i2cstat & I2CSTAT_OUTPUT_EN) {
249	s->i2cds = v;
250	s->scl_free = true;
251	if (EXYNOS4_I2C_MODE(s->i2cstat) == I2CMODE_MASTER_Tx &&
252	(s->i2cstat & I2CSTAT_START_BUSY) &&
253	!(s->i2ccon & I2CCON_INT_PEND)) {
254	exynos4210_i2c_data_send(s);
255	}
256	}
257	break;
258	case I2CLC_ADDR:
259	s->i2clc = v;
260	break;
261	default:
262	DPRINT("ERROR: Bad write offset 0x%x\n", (unsigned int)offset);
263	break;
264	}
265	}
266
267	static const MemoryRegionOps exynos4210_i2c_ops = {
268	.read = exynos4210_i2c_read,
269	.write = exynos4210_i2c_write,
270	.endianness = DEVICE_NATIVE_ENDIAN,
271	};
272
273	static const VMStateDescription exynos4210_i2c_vmstate = {
274	.name = TYPE_EXYNOS4_I2C,
275	.version_id = 1,
276	.minimum_version_id = 1,
277	.fields = (VMStateField[]) {
278	VMSTATE_UINT8(i2ccon, Exynos4210I2CState),
279	VMSTATE_UINT8(i2cstat, Exynos4210I2CState),
280	VMSTATE_UINT8(i2cds, Exynos4210I2CState),
281	VMSTATE_UINT8(i2cadd, Exynos4210I2CState),
282	VMSTATE_UINT8(i2clc, Exynos4210I2CState),
283	VMSTATE_BOOL(scl_free, Exynos4210I2CState),
284	VMSTATE_END_OF_LIST()
285	}
286	};
287
288	static void exynos4210_i2c_reset(DeviceState *d)
289	{
290	Exynos4210I2CState *s = EXYNOS4_I2C(d);
291
292	s->i2ccon = 0x00;
293	s->i2cstat = 0x00;
294	s->i2cds = 0xFF;
295	s->i2clc = 0x00;
296	s->i2cadd = 0xFF;
297	s->scl_free = true;
298	}
299
300	static int exynos4210_i2c_realize(SysBusDevice *dev)
301	{
302	Exynos4210I2CState *s = EXYNOS4_I2C(dev);
303
304	memory_region_init_io(&s->iomem, &exynos4210_i2c_ops, s, TYPE_EXYNOS4_I2C,
305	EXYNOS4_I2C_MEM_SIZE);
306	sysbus_init_mmio(dev, &s->iomem);
307	sysbus_init_irq(dev, &s->irq);
308	s->bus = i2c_init_bus(&dev->qdev, "i2c");
309	return 0;
310	}
311
312	static void exynos4210_i2c_class_init(ObjectClass klass, void data)
313	{
314	DeviceClass *dc = DEVICE_CLASS(klass);
315	SysBusDeviceClass *sbdc = SYS_BUS_DEVICE_CLASS(klass);
316
317	dc->vmsd = &exynos4210_i2c_vmstate;
318	dc->reset = exynos4210_i2c_reset;
319	sbdc->init = exynos4210_i2c_realize;
320	}
321
322	static const TypeInfo exynos4210_i2c_type_info = {
323	.name = TYPE_EXYNOS4_I2C,
324	.parent = TYPE_SYS_BUS_DEVICE,
325	.instance_size = sizeof(Exynos4210I2CState),
326	.class_init = exynos4210_i2c_class_init,
327	};
328
329	static void exynos4210_i2c_register_types(void)
330	{
331	type_register_static(&exynos4210_i2c_type_info);
332	}
333
334	type_init(exynos4210_i2c_register_types)