[qemu.git] / hw / i2c / imx_i2c.c

/*
 *  i.MX I2C Bus Serial Interface Emulation
 *
 *  Copyright (C) 2013 Jean-Christophe Dubois. <[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 "hw/i2c/imx_i2c.h"
#include "hw/i2c/i2c.h"
#include "qemu/log.h"

#ifndef DEBUG_IMX_I2C
#define DEBUG_IMX_I2C 0
#endif

#define DPRINTF(fmt, args...) \
    do { \
        if (DEBUG_IMX_I2C) { \
            fprintf(stderr, "[%s]%s: " fmt , TYPE_IMX_I2C, \
                                             __func__, ##args); \
        } \
    } while (0)

static const char *imx_i2c_get_regname(unsigned offset)
{
    switch (offset) {
    case IADR_ADDR:
        return "IADR";
    case IFDR_ADDR:
        return "IFDR";
    case I2CR_ADDR:
        return "I2CR";
    case I2SR_ADDR:
        return "I2SR";
    case I2DR_ADDR:
        return "I2DR";
    default:
        return "[?]";
    }
}

static inline bool imx_i2c_is_enabled(IMXI2CState *s)
{
    return s->i2cr & I2CR_IEN;
}

static inline bool imx_i2c_interrupt_is_enabled(IMXI2CState *s)
{
    return s->i2cr & I2CR_IIEN;
}

static inline bool imx_i2c_is_master(IMXI2CState *s)
{
    return s->i2cr & I2CR_MSTA;
}

static void imx_i2c_reset(DeviceState *dev)
{
    IMXI2CState *s = IMX_I2C(dev);

    if (s->address != ADDR_RESET) {
        i2c_end_transfer(s->bus);
    }

    s->address    = ADDR_RESET;
    s->iadr       = IADR_RESET;
    s->ifdr       = IFDR_RESET;
    s->i2cr       = I2CR_RESET;
    s->i2sr       = I2SR_RESET;
    s->i2dr_read  = I2DR_RESET;
    s->i2dr_write = I2DR_RESET;
}

static inline void imx_i2c_raise_interrupt(IMXI2CState *s)
{
    /*
     * raise an interrupt if the device is enabled and it is configured
     * to generate some interrupts.
     */
    if (imx_i2c_is_enabled(s) && imx_i2c_interrupt_is_enabled(s)) {
        s->i2sr |= I2SR_IIF;
        qemu_irq_raise(s->irq);
    }
}

static uint64_t imx_i2c_read(void *opaque, hwaddr offset,
                             unsigned size)
{
    uint16_t value;
    IMXI2CState *s = IMX_I2C(opaque);

    switch (offset) {
    case IADR_ADDR:
        value = s->iadr;
        break;
    case IFDR_ADDR:
        value = s->ifdr;
        break;
    case I2CR_ADDR:
        value = s->i2cr;
        break;
    case I2SR_ADDR:
        value = s->i2sr;
        break;
    case I2DR_ADDR:
        value = s->i2dr_read;

        if (imx_i2c_is_master(s)) {
            int ret = 0xff;

            if (s->address == ADDR_RESET) {
                /* something is wrong as the address is not set */
                qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Trying to read "
                              "without specifying the slave address\n",
                              TYPE_IMX_I2C, __func__);
            } else if (s->i2cr & I2CR_MTX) {
                qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Trying to read "
                              "but MTX is set\n", TYPE_IMX_I2C, __func__);
            } else {
                /* get the next byte */
                ret = i2c_recv(s->bus);

                if (ret >= 0) {
                    imx_i2c_raise_interrupt(s);
                } else {
                    qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: read failed "
                                  "for device 0x%02x\n", TYPE_IMX_I2C,
                                  __func__, s->address);
                    ret = 0xff;
                }
            }

            s->i2dr_read = ret;
        } else {
            qemu_log_mask(LOG_UNIMP, "[%s]%s: slave mode not implemented\n",
                          TYPE_IMX_I2C, __func__);
        }
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Bad address at offset 0x%"
                      HWADDR_PRIx "\n", TYPE_IMX_I2C, __func__, offset);
        value = 0;
        break;
    }

    DPRINTF("read %s [0x%" HWADDR_PRIx "] -> 0x%02x\n",
            imx_i2c_get_regname(offset), offset, value);

    return (uint64_t)value;
}

static void imx_i2c_write(void *opaque, hwaddr offset,
                          uint64_t value, unsigned size)
{
    IMXI2CState *s = IMX_I2C(opaque);

    DPRINTF("write %s [0x%" HWADDR_PRIx "] <- 0x%02x\n",
            imx_i2c_get_regname(offset), offset, (int)value);

    value &= 0xff;

    switch (offset) {
    case IADR_ADDR:
        s->iadr = value & IADR_MASK;
        /* i2c_set_slave_address(s->bus, (uint8_t)s->iadr); */
        break;
    case IFDR_ADDR:
        s->ifdr = value & IFDR_MASK;
        break;
    case I2CR_ADDR:
        if (imx_i2c_is_enabled(s) && ((value & I2CR_IEN) == 0)) {
            /* This is a soft reset. IADR is preserved during soft resets */
            uint16_t iadr = s->iadr;
            imx_i2c_reset(DEVICE(s));
            s->iadr = iadr;
        } else { /* normal write */
            s->i2cr = value & I2CR_MASK;

            if (imx_i2c_is_master(s)) {
                /* set the bus to busy */
                s->i2sr |= I2SR_IBB;
            } else { /* slave mode */
                /* bus is not busy anymore */
                s->i2sr &= ~I2SR_IBB;

                /*
                 * if we unset the master mode then it ends the ongoing
                 * transfer if any
                 */
                if (s->address != ADDR_RESET) {
                    i2c_end_transfer(s->bus);
                    s->address = ADDR_RESET;
                }
            }

            if (s->i2cr & I2CR_RSTA) { /* Restart */
                /* if this is a restart then it ends the ongoing transfer */
                if (s->address != ADDR_RESET) {
                    i2c_end_transfer(s->bus);
                    s->address = ADDR_RESET;
                    s->i2cr &= ~I2CR_RSTA;
                }
            }
        }
        break;
    case I2SR_ADDR:
        /*
         * if the user writes 0 to IIF then lower the interrupt and
         * reset the bit
         */
        if ((s->i2sr & I2SR_IIF) && !(value & I2SR_IIF)) {
            s->i2sr &= ~I2SR_IIF;
            qemu_irq_lower(s->irq);
        }

        /*
         * if the user writes 0 to IAL, reset the bit
         */
        if ((s->i2sr & I2SR_IAL) && !(value & I2SR_IAL)) {
            s->i2sr &= ~I2SR_IAL;
        }

        break;
    case I2DR_ADDR:
        /* if the device is not enabled, nothing to do */
        if (!imx_i2c_is_enabled(s)) {
            break;
        }

        s->i2dr_write = value & I2DR_MASK;

        if (imx_i2c_is_master(s)) {
            /* If this is the first write cycle then it is the slave addr */
            if (s->address == ADDR_RESET) {
                if (i2c_start_transfer(s->bus, extract32(s->i2dr_write, 1, 7),
                                       extract32(s->i2dr_write, 0, 1))) {
                    /* if non zero is returned, the address is not valid */
                    s->i2sr |= I2SR_RXAK;
                } else {
                    s->address = s->i2dr_write;
                    s->i2sr &= ~I2SR_RXAK;
                    imx_i2c_raise_interrupt(s);
                }
            } else { /* This is a normal data write */
                if (i2c_send(s->bus, s->i2dr_write)) {
                    /* if the target return non zero then end the transfer */
                    s->i2sr |= I2SR_RXAK;
                    s->address = ADDR_RESET;
                    i2c_end_transfer(s->bus);
                } else {
                    s->i2sr &= ~I2SR_RXAK;
                    imx_i2c_raise_interrupt(s);
                }
            }
        } else {
            qemu_log_mask(LOG_UNIMP, "[%s]%s: slave mode not implemented\n",
                          TYPE_IMX_I2C, __func__);
        }
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Bad address at offset 0x%"
                      HWADDR_PRIx "\n", TYPE_IMX_I2C, __func__, offset);
        break;
    }
}

static const MemoryRegionOps imx_i2c_ops = {
    .read = imx_i2c_read,
    .write = imx_i2c_write,
    .valid.min_access_size = 1,
    .valid.max_access_size = 2,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static const VMStateDescription imx_i2c_vmstate = {
    .name = TYPE_IMX_I2C,
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT16(address, IMXI2CState),
        VMSTATE_UINT16(iadr, IMXI2CState),
        VMSTATE_UINT16(ifdr, IMXI2CState),
        VMSTATE_UINT16(i2cr, IMXI2CState),
        VMSTATE_UINT16(i2sr, IMXI2CState),
        VMSTATE_UINT16(i2dr_read, IMXI2CState),
        VMSTATE_UINT16(i2dr_write, IMXI2CState),
        VMSTATE_END_OF_LIST()
    }
};

static void imx_i2c_realize(DeviceState *dev, Error **errp)
{
    IMXI2CState *s = IMX_I2C(dev);

    memory_region_init_io(&s->iomem, OBJECT(s), &imx_i2c_ops, s, TYPE_IMX_I2C,
                          IMX_I2C_MEM_SIZE);
    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
    sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
    s->bus = i2c_init_bus(DEVICE(dev), NULL);
}

static void imx_i2c_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->vmsd = &imx_i2c_vmstate;
    dc->reset = imx_i2c_reset;
    dc->realize = imx_i2c_realize;
    dc->desc = "i.MX I2C Controller";
}

static const TypeInfo imx_i2c_type_info = {
    .name = TYPE_IMX_I2C,
    .parent = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(IMXI2CState),
    .class_init = imx_i2c_class_init,
};

static void imx_i2c_register_types(void)
{
    type_register_static(&imx_i2c_type_info);
}

type_init(imx_i2c_register_types)
Commit	Line	Data
20d0f9cf JCD	1	/*
	2	* i.MX I2C Bus Serial Interface Emulation
	3	*
	4	* Copyright (C) 2013 Jean-Christophe Dubois. <[email protected]>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* 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, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	* for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; if not, see <http://www.gnu.org/licenses/>.
	18	*
	19	*/
	20
8ef94f0b	21	#include "qemu/osdep.h"
20d0f9cf JCD	22	#include "hw/i2c/imx_i2c.h"
20d0f9cf JCD	23	#include "hw/i2c/i2c.h"
03dd024f	24	#include "qemu/log.h"
20d0f9cf	25
3afcbb01 JCD	26	#ifndef DEBUG_IMX_I2C
3afcbb01 JCD	27	#define DEBUG_IMX_I2C 0
20d0f9cf JCD	28	#endif
20d0f9cf JCD	29
3afcbb01 JCD	30	#define DPRINTF(fmt, args...) \
	31	do { \
	32	if (DEBUG_IMX_I2C) { \
	33	fprintf(stderr, "[%s]%s: " fmt , TYPE_IMX_I2C, \
	34	__func__, ##args); \
	35	} \
	36	} while (0)
20d0f9cf JCD	37
	38	static const char *imx_i2c_get_regname(unsigned offset)
	39	{
	40	switch (offset) {
	41	case IADR_ADDR:
	42	return "IADR";
	43	case IFDR_ADDR:
	44	return "IFDR";
	45	case I2CR_ADDR:
	46	return "I2CR";
	47	case I2SR_ADDR:
	48	return "I2SR";
	49	case I2DR_ADDR:
	50	return "I2DR";
	51	default:
	52	return "[?]";
	53	}
	54	}
20d0f9cf JCD	55
	56	static inline bool imx_i2c_is_enabled(IMXI2CState *s)
	57	{
	58	return s->i2cr & I2CR_IEN;
	59	}
	60
	61	static inline bool imx_i2c_interrupt_is_enabled(IMXI2CState *s)
	62	{
	63	return s->i2cr & I2CR_IIEN;
	64	}
	65
	66	static inline bool imx_i2c_is_master(IMXI2CState *s)
	67	{
	68	return s->i2cr & I2CR_MSTA;
	69	}
	70
	71	static void imx_i2c_reset(DeviceState *dev)
	72	{
	73	IMXI2CState *s = IMX_I2C(dev);
	74
	75	if (s->address != ADDR_RESET) {
	76	i2c_end_transfer(s->bus);
	77	}
	78
	79	s->address = ADDR_RESET;
	80	s->iadr = IADR_RESET;
	81	s->ifdr = IFDR_RESET;
	82	s->i2cr = I2CR_RESET;
	83	s->i2sr = I2SR_RESET;
	84	s->i2dr_read = I2DR_RESET;
	85	s->i2dr_write = I2DR_RESET;
	86	}
	87
	88	static inline void imx_i2c_raise_interrupt(IMXI2CState *s)
	89	{
	90	/*
	91	* raise an interrupt if the device is enabled and it is configured
	92	* to generate some interrupts.
	93	*/
	94	if (imx_i2c_is_enabled(s) && imx_i2c_interrupt_is_enabled(s)) {
	95	s->i2sr \|= I2SR_IIF;
	96	qemu_irq_raise(s->irq);
	97	}
	98	}
	99
	100	static uint64_t imx_i2c_read(void *opaque, hwaddr offset,
	101	unsigned size)
	102	{
	103	uint16_t value;
	104	IMXI2CState *s = IMX_I2C(opaque);
	105
	106	switch (offset) {
	107	case IADR_ADDR:
	108	value = s->iadr;
	109	break;
	110	case IFDR_ADDR:
	111	value = s->ifdr;
	112	break;
	113	case I2CR_ADDR:
	114	value = s->i2cr;
	115	break;
	116	case I2SR_ADDR:
	117	value = s->i2sr;
	118	break;
119	case I2DR_ADDR:
120	value = s->i2dr_read;
121
122	if (imx_i2c_is_master(s)) {
123	int ret = 0xff;
124
125	if (s->address == ADDR_RESET) {
126	/* something is wrong as the address is not set */
3afcbb01	127	qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Trying to read "
20d0f9cf JCD	128	"without specifying the slave address\n",
	129	TYPE_IMX_I2C, __func__);
	130	} else if (s->i2cr & I2CR_MTX) {
3afcbb01	131	qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Trying to read "
20d0f9cf JCD	132	"but MTX is set\n", TYPE_IMX_I2C, __func__);
	133	} else {
	134	/* get the next byte */
	135	ret = i2c_recv(s->bus);
	136
	137	if (ret >= 0) {
	138	imx_i2c_raise_interrupt(s);
	139	} else {
3afcbb01	140	qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: read failed "
20d0f9cf JCD	141	"for device 0x%02x\n", TYPE_IMX_I2C,
	142	__func__, s->address);
	143	ret = 0xff;
	144	}
	145	}
	146
	147	s->i2dr_read = ret;
	148	} else {
3afcbb01	149	qemu_log_mask(LOG_UNIMP, "[%s]%s: slave mode not implemented\n",
20d0f9cf JCD	150	TYPE_IMX_I2C, __func__);
	151	}
	152	break;
	153	default:
3afcbb01 JCD	154	qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Bad address at offset 0x%"
3afcbb01 JCD	155	HWADDR_PRIx "\n", TYPE_IMX_I2C, __func__, offset);
20d0f9cf JCD	156	value = 0;
	157	break;
	158	}
	159
3afcbb01 JCD	160	DPRINTF("read %s [0x%" HWADDR_PRIx "] -> 0x%02x\n",
3afcbb01 JCD	161	imx_i2c_get_regname(offset), offset, value);
20d0f9cf JCD	162
	163	return (uint64_t)value;
	164	}
	165
	166	static void imx_i2c_write(void *opaque, hwaddr offset,
	167	uint64_t value, unsigned size)
	168	{
	169	IMXI2CState *s = IMX_I2C(opaque);
	170
3afcbb01 JCD	171	DPRINTF("write %s [0x%" HWADDR_PRIx "] <- 0x%02x\n",
3afcbb01 JCD	172	imx_i2c_get_regname(offset), offset, (int)value);
20d0f9cf JCD	173
	174	value &= 0xff;
	175
	176	switch (offset) {
	177	case IADR_ADDR:
	178	s->iadr = value & IADR_MASK;
	179	/* i2c_set_slave_address(s->bus, (uint8_t)s->iadr); */
	180	break;
	181	case IFDR_ADDR:
	182	s->ifdr = value & IFDR_MASK;
	183	break;
	184	case I2CR_ADDR:
	185	if (imx_i2c_is_enabled(s) && ((value & I2CR_IEN) == 0)) {
	186	/* This is a soft reset. IADR is preserved during soft resets */
	187	uint16_t iadr = s->iadr;
	188	imx_i2c_reset(DEVICE(s));
	189	s->iadr = iadr;
	190	} else { /* normal write */
	191	s->i2cr = value & I2CR_MASK;
	192
	193	if (imx_i2c_is_master(s)) {
	194	/* set the bus to busy */
	195	s->i2sr \|= I2SR_IBB;
	196	} else { /* slave mode */
	197	/* bus is not busy anymore */
	198	s->i2sr &= ~I2SR_IBB;
	199
	200	/*
	201	* if we unset the master mode then it ends the ongoing
	202	* transfer if any
	203	*/
	204	if (s->address != ADDR_RESET) {
	205	i2c_end_transfer(s->bus);
	206	s->address = ADDR_RESET;
	207	}
	208	}
	209
	210	if (s->i2cr & I2CR_RSTA) { /* Restart */
	211	/* if this is a restart then it ends the ongoing transfer */
	212	if (s->address != ADDR_RESET) {
	213	i2c_end_transfer(s->bus);
	214	s->address = ADDR_RESET;
	215	s->i2cr &= ~I2CR_RSTA;
	216	}
	217	}
	218	}
	219	break;
	220	case I2SR_ADDR:
	221	/*
	222	* if the user writes 0 to IIF then lower the interrupt and
	223	* reset the bit
	224	*/
	225	if ((s->i2sr & I2SR_IIF) && !(value & I2SR_IIF)) {
	226	s->i2sr &= ~I2SR_IIF;
	227	qemu_irq_lower(s->irq);
	228	}
	229
	230	/*
	231	* if the user writes 0 to IAL, reset the bit
	232	*/
	233	if ((s->i2sr & I2SR_IAL) && !(value & I2SR_IAL)) {
	234	s->i2sr &= ~I2SR_IAL;
	235	}
	236
237	break;
238	case I2DR_ADDR:
239	/* if the device is not enabled, nothing to do */
240	if (!imx_i2c_is_enabled(s)) {
241	break;
242	}
243
244	s->i2dr_write = value & I2DR_MASK;
245
246	if (imx_i2c_is_master(s)) {
247	/* If this is the first write cycle then it is the slave addr */
248	if (s->address == ADDR_RESET) {
249	if (i2c_start_transfer(s->bus, extract32(s->i2dr_write, 1, 7),
250	extract32(s->i2dr_write, 0, 1))) {
cb8d4c8f	251	/* if non zero is returned, the address is not valid */
20d0f9cf JCD	252	s->i2sr \|= I2SR_RXAK;
	253	} else {
	254	s->address = s->i2dr_write;
	255	s->i2sr &= ~I2SR_RXAK;
	256	imx_i2c_raise_interrupt(s);
	257	}
	258	} else { /* This is a normal data write */
	259	if (i2c_send(s->bus, s->i2dr_write)) {
	260	/* if the target return non zero then end the transfer */
	261	s->i2sr \|= I2SR_RXAK;
	262	s->address = ADDR_RESET;
	263	i2c_end_transfer(s->bus);
	264	} else {
	265	s->i2sr &= ~I2SR_RXAK;
	266	imx_i2c_raise_interrupt(s);
	267	}
	268	}
	269	} else {
3afcbb01	270	qemu_log_mask(LOG_UNIMP, "[%s]%s: slave mode not implemented\n",
20d0f9cf JCD	271	TYPE_IMX_I2C, __func__);
	272	}
	273	break;
	274	default:
3afcbb01 JCD	275	qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Bad address at offset 0x%"
3afcbb01 JCD	276	HWADDR_PRIx "\n", TYPE_IMX_I2C, __func__, offset);
20d0f9cf JCD	277	break;
	278	}
	279	}
	280
	281	static const MemoryRegionOps imx_i2c_ops = {
	282	.read = imx_i2c_read,
	283	.write = imx_i2c_write,
	284	.valid.min_access_size = 1,
	285	.valid.max_access_size = 2,
	286	.endianness = DEVICE_NATIVE_ENDIAN,
	287	};
	288
	289	static const VMStateDescription imx_i2c_vmstate = {
	290	.name = TYPE_IMX_I2C,
	291	.version_id = 1,
	292	.minimum_version_id = 1,
	293	.fields = (VMStateField[]) {
	294	VMSTATE_UINT16(address, IMXI2CState),
	295	VMSTATE_UINT16(iadr, IMXI2CState),
	296	VMSTATE_UINT16(ifdr, IMXI2CState),
	297	VMSTATE_UINT16(i2cr, IMXI2CState),
	298	VMSTATE_UINT16(i2sr, IMXI2CState),
	299	VMSTATE_UINT16(i2dr_read, IMXI2CState),
	300	VMSTATE_UINT16(i2dr_write, IMXI2CState),
	301	VMSTATE_END_OF_LIST()
	302	}
	303	};
	304
	305	static void imx_i2c_realize(DeviceState dev, Error *errp)
	306	{
	307	IMXI2CState *s = IMX_I2C(dev);
	308
	309	memory_region_init_io(&s->iomem, OBJECT(s), &imx_i2c_ops, s, TYPE_IMX_I2C,
	310	IMX_I2C_MEM_SIZE);
	311	sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
	312	sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
643bb6fc	313	s->bus = i2c_init_bus(DEVICE(dev), NULL);
20d0f9cf JCD	314	}
	315
	316	static void imx_i2c_class_init(ObjectClass klass, void data)
	317	{
	318	DeviceClass *dc = DEVICE_CLASS(klass);
	319
	320	dc->vmsd = &imx_i2c_vmstate;
	321	dc->reset = imx_i2c_reset;
	322	dc->realize = imx_i2c_realize;
eccfa35e	323	dc->desc = "i.MX I2C Controller";
20d0f9cf JCD	324	}
	325
	326	static const TypeInfo imx_i2c_type_info = {
	327	.name = TYPE_IMX_I2C,
	328	.parent = TYPE_SYS_BUS_DEVICE,
	329	.instance_size = sizeof(IMXI2CState),
	330	.class_init = imx_i2c_class_init,
	331	};
	332
	333	static void imx_i2c_register_types(void)
	334	{
	335	type_register_static(&imx_i2c_type_info);
	336	}
	337
	338	type_init(imx_i2c_register_types)