[linux-2.6-block.git] / drivers / media / dvb / b2c2 / flexcop-i2c.c

/*
 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
 *
 * flexcop-i2c.c - flexcop internal 2Wire bus (I2C) and dvb i2c initialization
 *
 * see flexcop.c for copyright information.
 */
#include "flexcop.h"

#define FC_MAX_I2C_RETRIES 100000

/* #define DUMP_I2C_MESSAGES */

static int flexcop_i2c_operation(struct flexcop_device *fc, flexcop_ibi_value *r100)
{
	int i;
	flexcop_ibi_value r;

	r100->tw_sm_c_100.working_start = 1;
	deb_i2c("r100 before: %08x\n",r100->raw);

	fc->write_ibi_reg(fc, tw_sm_c_100, ibi_zero);
	fc->write_ibi_reg(fc, tw_sm_c_100, *r100); /* initiating i2c operation */

	for (i = 0; i < FC_MAX_I2C_RETRIES; i++) {
		r = fc->read_ibi_reg(fc, tw_sm_c_100);

		if (!r.tw_sm_c_100.no_base_addr_ack_error) {
			if (r.tw_sm_c_100.st_done) {  /* && !r.tw_sm_c_100.working_start */
				*r100 = r;
				deb_i2c("i2c success\n");
				return 0;
			}
		} else {
			deb_i2c("suffering from an i2c ack_error\n");
			return -EREMOTEIO;
		}
	}
	deb_i2c("tried %d times i2c operation, never finished or too many ack errors.\n",i);
	return -EREMOTEIO;
}

static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
	flexcop_ibi_value r100, u8 *buf)
{
	flexcop_ibi_value r104;
	int len = r100.tw_sm_c_100.total_bytes, /* remember total_bytes is buflen-1 */
		ret;

	ret = flexcop_i2c_operation(i2c->fc, &r100);
	if (ret != 0) {
		deb_i2c("Retrying operation\n");
		r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
		ret = flexcop_i2c_operation(i2c->fc, &r100);
	}
	if (ret != 0) {
		deb_i2c("read failed. %d\n", ret);
		return ret;
	}

	buf[0] = r100.tw_sm_c_100.data1_reg;

	if (len > 0) {
		r104 = i2c->fc->read_ibi_reg(i2c->fc, tw_sm_c_104);
		deb_i2c("read: r100: %08x, r104: %08x\n", r100.raw, r104.raw);

		/* there is at least one more byte, otherwise we wouldn't be here */
		buf[1] = r104.tw_sm_c_104.data2_reg;
		if (len > 1) buf[2] = r104.tw_sm_c_104.data3_reg;
		if (len > 2) buf[3] = r104.tw_sm_c_104.data4_reg;
	}

	return 0;
}

static int flexcop_i2c_write4(struct flexcop_device *fc, flexcop_ibi_value r100, u8 *buf)
{
	flexcop_ibi_value r104;
	int len = r100.tw_sm_c_100.total_bytes; /* remember total_bytes is buflen-1 */
	r104.raw = 0;

	/* there is at least one byte, otherwise we wouldn't be here */
	r100.tw_sm_c_100.data1_reg = buf[0];

	r104.tw_sm_c_104.data2_reg = len > 0 ? buf[1] : 0;
	r104.tw_sm_c_104.data3_reg = len > 1 ? buf[2] : 0;
	r104.tw_sm_c_104.data4_reg = len > 2 ? buf[3] : 0;

	deb_i2c("write: r100: %08x, r104: %08x\n", r100.raw, r104.raw);

	/* write the additional i2c data before doing the actual i2c operation */
	fc->write_ibi_reg(fc, tw_sm_c_104, r104);
	return flexcop_i2c_operation(fc, &r100);
}

int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
	flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
{
	int ret;

#ifdef DUMP_I2C_MESSAGES
	int i;
#endif

	u16 bytes_to_transfer;
	flexcop_ibi_value r100;

	deb_i2c("op = %d\n",op);
	r100.raw = 0;
	r100.tw_sm_c_100.chipaddr = chipaddr;
	r100.tw_sm_c_100.twoWS_rw = op;
	r100.tw_sm_c_100.twoWS_port_reg = i2c->port;

#ifdef DUMP_I2C_MESSAGES
	printk(KERN_DEBUG "%d ", i2c->port);
	if (op == FC_READ)
		printk("rd(");
	else
		printk("wr(");

	printk("%02x): %02x ", chipaddr, addr);
#endif

	/* in that case addr is the only value ->
	 * we write it twice as baseaddr and val0
	 * BBTI is doing it like that for ISL6421 at least */
	if (i2c->no_base_addr && len == 0 && op == FC_WRITE) {
		buf = &addr;
		len = 1;
	}

	while (len != 0) {
		bytes_to_transfer = len > 4 ? 4 : len;

		r100.tw_sm_c_100.total_bytes = bytes_to_transfer - 1;
		r100.tw_sm_c_100.baseaddr = addr;

		if (op == FC_READ)
			ret = flexcop_i2c_read4(i2c, r100, buf);
		else
			ret = flexcop_i2c_write4(i2c->fc, r100, buf);

#ifdef DUMP_I2C_MESSAGES
		for (i = 0; i < bytes_to_transfer; i++)
			printk("%02x ", buf[i]);
#endif

		if (ret < 0)
			return ret;

		buf  += bytes_to_transfer;
		addr += bytes_to_transfer;
		len  -= bytes_to_transfer;
	}

#ifdef DUMP_I2C_MESSAGES
	printk("\n");
#endif

	return 0;
}
/* exported for PCI i2c */
EXPORT_SYMBOL(flexcop_i2c_request);

/* master xfer callback for demodulator */
static int flexcop_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
{
	struct flexcop_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
	int i, ret = 0;

	/* Some drivers use 1 byte or 0 byte reads as probes, which this
	 * driver doesn't support.  These probes will always fail, so this
	 * hack makes them always succeed.  If one knew how, it would of
	 * course be better to actually do the read.  */
	if (num == 1 && msgs[0].flags == I2C_M_RD && msgs[0].len <= 1)
		return 1;

	if (mutex_lock_interruptible(&i2c->fc->i2c_mutex))
		return -ERESTARTSYS;

	for (i = 0; i < num; i++) {
		/* reading */
		if (i+1 < num && (msgs[i+1].flags == I2C_M_RD)) {
			ret = i2c->fc->i2c_request(i2c, FC_READ, msgs[i].addr,
				msgs[i].buf[0], msgs[i+1].buf, msgs[i+1].len);
			i++; /* skip the following message */
		} else /* writing */
			ret = i2c->fc->i2c_request(i2c, FC_WRITE, msgs[i].addr,
				msgs[i].buf[0], &msgs[i].buf[1],
				msgs[i].len - 1);
		if (ret < 0) {
			err("i2c master_xfer failed");
			break;
		}
	}

	mutex_unlock(&i2c->fc->i2c_mutex);

	if (ret == 0)
		ret = num;
	return ret;
}

static u32 flexcop_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

static struct i2c_algorithm flexcop_algo = {
	.master_xfer	= flexcop_master_xfer,
	.functionality	= flexcop_i2c_func,
};

int flexcop_i2c_init(struct flexcop_device *fc)
{
	int ret;

	mutex_init(&fc->i2c_mutex);

	fc->fc_i2c_adap[0].fc = fc;
	fc->fc_i2c_adap[1].fc = fc;
	fc->fc_i2c_adap[2].fc = fc;

	fc->fc_i2c_adap[0].port = FC_I2C_PORT_DEMOD;
	fc->fc_i2c_adap[1].port = FC_I2C_PORT_EEPROM;
	fc->fc_i2c_adap[2].port = FC_I2C_PORT_TUNER;

	strlcpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
		sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
	strlcpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
		sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
	strlcpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
		sizeof(fc->fc_i2c_adap[2].i2c_adap.name));

	i2c_set_adapdata(&fc->fc_i2c_adap[0].i2c_adap, &fc->fc_i2c_adap[0]);
	i2c_set_adapdata(&fc->fc_i2c_adap[1].i2c_adap, &fc->fc_i2c_adap[1]);
	i2c_set_adapdata(&fc->fc_i2c_adap[2].i2c_adap, &fc->fc_i2c_adap[2]);

	fc->fc_i2c_adap[0].i2c_adap.class =
		fc->fc_i2c_adap[1].i2c_adap.class =
		fc->fc_i2c_adap[2].i2c_adap.class = I2C_CLASS_TV_DIGITAL;
	fc->fc_i2c_adap[0].i2c_adap.algo =
		fc->fc_i2c_adap[1].i2c_adap.algo =
		fc->fc_i2c_adap[2].i2c_adap.algo = &flexcop_algo;
	fc->fc_i2c_adap[0].i2c_adap.algo_data =
		fc->fc_i2c_adap[1].i2c_adap.algo_data =
		fc->fc_i2c_adap[2].i2c_adap.algo_data = NULL;
	fc->fc_i2c_adap[0].i2c_adap.dev.parent =
		fc->fc_i2c_adap[1].i2c_adap.dev.parent =
		fc->fc_i2c_adap[2].i2c_adap.dev.parent = fc->dev;

	ret = i2c_add_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	if (ret < 0)
		return ret;

	ret = i2c_add_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	if (ret < 0)
		goto adap_1_failed;

	ret = i2c_add_adapter(&fc->fc_i2c_adap[2].i2c_adap);
	if (ret < 0)
		goto adap_2_failed;

	fc->init_state |= FC_STATE_I2C_INIT;
	return 0;

adap_2_failed:
	i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
adap_1_failed:
	i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);

	return ret;
}

void flexcop_i2c_exit(struct flexcop_device *fc)
{
	if (fc->init_state & FC_STATE_I2C_INIT) {
		i2c_del_adapter(&fc->fc_i2c_adap[2].i2c_adap);
		i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
		i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	}

	fc->init_state &= ~FC_STATE_I2C_INIT;
}
Commit	Line	Data
2add87a9 JS	1	/*
	2	* This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
	3	*
	4	* flexcop-i2c.c - flexcop internal 2Wire bus (I2C) and dvb i2c initialization
	5	*
	6	* see flexcop.c for copyright information.
	7	*/
	8	#include "flexcop.h"
	9
	10	#define FC_MAX_I2C_RETRIES 100000
	11
6394cf53 PB	12	/* #define DUMP_I2C_MESSAGES */
6394cf53 PB	13
bdc78001	14	static int flexcop_i2c_operation(struct flexcop_device fc, flexcop_ibi_value r100)
2add87a9	15	{
bdc78001	16	int i;
2add87a9 JS	17	flexcop_ibi_value r;
	18
	19	r100->tw_sm_c_100.working_start = 1;
	20	deb_i2c("r100 before: %08x\n",r100->raw);
	21
	22	fc->write_ibi_reg(fc, tw_sm_c_100, ibi_zero);
	23	fc->write_ibi_reg(fc, tw_sm_c_100, r100); / initiating i2c operation */
	24
	25	for (i = 0; i < FC_MAX_I2C_RETRIES; i++) {
	26	r = fc->read_ibi_reg(fc, tw_sm_c_100);
	27
	28	if (!r.tw_sm_c_100.no_base_addr_ack_error) {
	29	if (r.tw_sm_c_100.st_done) { /* && !r.tw_sm_c_100.working_start */
	30	*r100 = r;
	31	deb_i2c("i2c success\n");
	32	return 0;
	33	}
	34	} else {
	35	deb_i2c("suffering from an i2c ack_error\n");
bdc78001	36	return -EREMOTEIO;
2add87a9 JS	37	}
	38	}
	39	deb_i2c("tried %d times i2c operation, never finished or too many ack errors.\n",i);
	40	return -EREMOTEIO;
	41	}
	42
6394cf53 PB	43	static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
6394cf53 PB	44	flexcop_ibi_value r100, u8 *buf)
2add87a9 JS	45	{
	46	flexcop_ibi_value r104;
	47	int len = r100.tw_sm_c_100.total_bytes, /* remember total_bytes is buflen-1 */
	48	ret;
	49
6394cf53	50	ret = flexcop_i2c_operation(i2c->fc, &r100);
11c6c7fb AS	51	if (ret != 0) {
	52	deb_i2c("Retrying operation\n");
	53	r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
	54	ret = flexcop_i2c_operation(i2c->fc, &r100);
	55	}
6394cf53 PB	56	if (ret != 0) {
	57	deb_i2c("read failed. %d\n", ret);
	58	return ret;
bdc78001	59	}
2add87a9	60
2add87a9 JS	61	buf[0] = r100.tw_sm_c_100.data1_reg;
2add87a9 JS	62
bdc78001	63	if (len > 0) {
6394cf53 PB	64	r104 = i2c->fc->read_ibi_reg(i2c->fc, tw_sm_c_104);
6394cf53 PB	65	deb_i2c("read: r100: %08x, r104: %08x\n", r100.raw, r104.raw);
bdc78001 JS	66
	67	/* there is at least one more byte, otherwise we wouldn't be here */
	68	buf[1] = r104.tw_sm_c_104.data2_reg;
	69	if (len > 1) buf[2] = r104.tw_sm_c_104.data3_reg;
	70	if (len > 2) buf[3] = r104.tw_sm_c_104.data4_reg;
	71	}
2add87a9 JS	72
	73	return 0;
	74	}
	75
	76	static int flexcop_i2c_write4(struct flexcop_device fc, flexcop_ibi_value r100, u8 buf)
	77	{
	78	flexcop_ibi_value r104;
	79	int len = r100.tw_sm_c_100.total_bytes; /* remember total_bytes is buflen-1 */
	80	r104.raw = 0;
	81
	82	/* there is at least one byte, otherwise we wouldn't be here */
	83	r100.tw_sm_c_100.data1_reg = buf[0];
	84
	85	r104.tw_sm_c_104.data2_reg = len > 0 ? buf[1] : 0;
	86	r104.tw_sm_c_104.data3_reg = len > 1 ? buf[2] : 0;
	87	r104.tw_sm_c_104.data4_reg = len > 2 ? buf[3] : 0;
	88
6394cf53	89	deb_i2c("write: r100: %08x, r104: %08x\n", r100.raw, r104.raw);
2add87a9 JS	90
2add87a9 JS	91	/* write the additional i2c data before doing the actual i2c operation */
6394cf53 PB	92	fc->write_ibi_reg(fc, tw_sm_c_104, r104);
6394cf53 PB	93	return flexcop_i2c_operation(fc, &r100);
bdc78001 JS	94	}
bdc78001 JS	95
6394cf53 PB	96	int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
6394cf53 PB	97	flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
bdc78001 JS	98	{
bdc78001 JS	99	int ret;
6394cf53 PB	100
	101	#ifdef DUMP_I2C_MESSAGES
	102	int i;
	103	#endif
	104
bdc78001 JS	105	u16 bytes_to_transfer;
	106	flexcop_ibi_value r100;
	107
	108	deb_i2c("op = %d\n",op);
	109	r100.raw = 0;
	110	r100.tw_sm_c_100.chipaddr = chipaddr;
	111	r100.tw_sm_c_100.twoWS_rw = op;
6394cf53 PB	112	r100.tw_sm_c_100.twoWS_port_reg = i2c->port;
	113
	114	#ifdef DUMP_I2C_MESSAGES
	115	printk(KERN_DEBUG "%d ", i2c->port);
	116	if (op == FC_READ)
	117	printk("rd(");
	118	else
	119	printk("wr(");
	120
	121	printk("%02x): %02x ", chipaddr, addr);
	122	#endif
	123
	124	/* in that case addr is the only value ->
	125	* we write it twice as baseaddr and val0
	126	* BBTI is doing it like that for ISL6421 at least */
	127	if (i2c->no_base_addr && len == 0 && op == FC_WRITE) {
	128	buf = &addr;
	129	len = 1;
	130	}
bdc78001 JS	131
	132	while (len != 0) {
	133	bytes_to_transfer = len > 4 ? 4 : len;
2add87a9	134
bdc78001 JS	135	r100.tw_sm_c_100.total_bytes = bytes_to_transfer - 1;
	136	r100.tw_sm_c_100.baseaddr = addr;
	137
	138	if (op == FC_READ)
6394cf53	139	ret = flexcop_i2c_read4(i2c, r100, buf);
bdc78001	140	else
6394cf53 PB	141	ret = flexcop_i2c_write4(i2c->fc, r100, buf);
	142
	143	#ifdef DUMP_I2C_MESSAGES
	144	for (i = 0; i < bytes_to_transfer; i++)
	145	printk("%02x ", buf[i]);
	146	#endif
bdc78001 JS	147
	148	if (ret < 0)
	149	return ret;
	150
	151	buf += bytes_to_transfer;
	152	addr += bytes_to_transfer;
	153	len -= bytes_to_transfer;
6394cf53 PB	154	}
	155
	156	#ifdef DUMP_I2C_MESSAGES
	157	printk("\n");
	158	#endif
bdc78001 JS	159
bdc78001 JS	160	return 0;
2add87a9	161	}
bdc78001 JS	162	/* exported for PCI i2c */
bdc78001 JS	163	EXPORT_SYMBOL(flexcop_i2c_request);
2add87a9 JS	164
	165	/* master xfer callback for demodulator */
	166	static int flexcop_master_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
	167	{
6394cf53	168	struct flexcop_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
2add87a9 JS	169	int i, ret = 0;
2add87a9 JS	170
6175e487 TP	171	/* Some drivers use 1 byte or 0 byte reads as probes, which this
	172	* driver doesn't support. These probes will always fail, so this
	173	* hack makes them always succeed. If one knew how, it would of
	174	* course be better to actually do the read. */
	175	if (num == 1 && msgs[0].flags == I2C_M_RD && msgs[0].len <= 1)
	176	return 1;
	177
6394cf53	178	if (mutex_lock_interruptible(&i2c->fc->i2c_mutex))
2add87a9 JS	179	return -ERESTARTSYS;
2add87a9 JS	180
6394cf53 PB	181	for (i = 0; i < num; i++) {
	182	/* reading */
	183	if (i+1 < num && (msgs[i+1].flags == I2C_M_RD)) {
	184	ret = i2c->fc->i2c_request(i2c, FC_READ, msgs[i].addr,
	185	msgs[i].buf[0], msgs[i+1].buf, msgs[i+1].len);
	186	i++; /* skip the following message */
	187	} else /* writing */
	188	ret = i2c->fc->i2c_request(i2c, FC_WRITE, msgs[i].addr,
	189	msgs[i].buf[0], &msgs[i].buf[1],
	190	msgs[i].len - 1);
	191	if (ret < 0) {
	192	err("i2c master_xfer failed");
2add87a9 JS	193	break;
2add87a9 JS	194	}
2add87a9 JS	195	}
2add87a9 JS	196
6394cf53	197	mutex_unlock(&i2c->fc->i2c_mutex);
2add87a9	198
6394cf53 PB	199	if (ret == 0)
6394cf53 PB	200	ret = num;
2add87a9 JS	201	return ret;
	202	}
	203
2add87a9 JS	204	static u32 flexcop_i2c_func(struct i2c_adapter *adapter)
	205	{
	206	return I2C_FUNC_I2C;
	207	}
	208
	209	static struct i2c_algorithm flexcop_algo = {
2add87a9 JS	210	.master_xfer = flexcop_master_xfer,
	211	.functionality = flexcop_i2c_func,
	212	};
	213
	214	int flexcop_i2c_init(struct flexcop_device *fc)
	215	{
	216	int ret;
	217
3593cab5	218	mutex_init(&fc->i2c_mutex);
2add87a9	219
6394cf53 PB	220	fc->fc_i2c_adap[0].fc = fc;
	221	fc->fc_i2c_adap[1].fc = fc;
	222	fc->fc_i2c_adap[2].fc = fc;
	223
	224	fc->fc_i2c_adap[0].port = FC_I2C_PORT_DEMOD;
	225	fc->fc_i2c_adap[1].port = FC_I2C_PORT_EEPROM;
	226	fc->fc_i2c_adap[2].port = FC_I2C_PORT_TUNER;
	227
1d434012 JD	228	strlcpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
	229	sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
	230	strlcpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
	231	sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
	232	strlcpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
	233	sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
6394cf53 PB	234
	235	i2c_set_adapdata(&fc->fc_i2c_adap[0].i2c_adap, &fc->fc_i2c_adap[0]);
	236	i2c_set_adapdata(&fc->fc_i2c_adap[1].i2c_adap, &fc->fc_i2c_adap[1]);
	237	i2c_set_adapdata(&fc->fc_i2c_adap[2].i2c_adap, &fc->fc_i2c_adap[2]);
	238
	239	fc->fc_i2c_adap[0].i2c_adap.class =
	240	fc->fc_i2c_adap[1].i2c_adap.class =
	241	fc->fc_i2c_adap[2].i2c_adap.class = I2C_CLASS_TV_DIGITAL;
	242	fc->fc_i2c_adap[0].i2c_adap.algo =
	243	fc->fc_i2c_adap[1].i2c_adap.algo =
	244	fc->fc_i2c_adap[2].i2c_adap.algo = &flexcop_algo;
	245	fc->fc_i2c_adap[0].i2c_adap.algo_data =
	246	fc->fc_i2c_adap[1].i2c_adap.algo_data =
	247	fc->fc_i2c_adap[2].i2c_adap.algo_data = NULL;
	248	fc->fc_i2c_adap[0].i2c_adap.dev.parent =
	249	fc->fc_i2c_adap[1].i2c_adap.dev.parent =
	250	fc->fc_i2c_adap[2].i2c_adap.dev.parent = fc->dev;
	251
	252	ret = i2c_add_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	253	if (ret < 0)
	254	return ret;
2add87a9	255
6394cf53 PB	256	ret = i2c_add_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	257	if (ret < 0)
	258	goto adap_1_failed;
2add87a9	259
6394cf53 PB	260	ret = i2c_add_adapter(&fc->fc_i2c_adap[2].i2c_adap);
	261	if (ret < 0)
	262	goto adap_2_failed;
2add87a9 JS	263
	264	fc->init_state \|= FC_STATE_I2C_INIT;
	265	return 0;
6394cf53 PB	266
	267	adap_2_failed:
	268	i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	269	adap_1_failed:
	270	i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	271
	272	return ret;
2add87a9 JS	273	}
	274
	275	void flexcop_i2c_exit(struct flexcop_device *fc)
	276	{
6394cf53 PB	277	if (fc->init_state & FC_STATE_I2C_INIT) {
	278	i2c_del_adapter(&fc->fc_i2c_adap[2].i2c_adap);
	279	i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	280	i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	281	}
2add87a9 JS	282
	283	fc->init_state &= ~FC_STATE_I2C_INIT;
	284	}