[mirror_ubuntu-bionic-kernel.git] / drivers / media / common / b2c2 / flexcop-i2c.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Linux driver for 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

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) {
				*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;

	/* work-around to have CableStar2 and SkyStar2 rev 2.7 work
	 * correctly:
	 *
	 * the ITD1000 is behind an i2c-gate which closes automatically
	 * after an i2c-transaction the STV0297 needs 2 consecutive reads
	 * one with no_base_addr = 0 and one with 1
	 *
	 * those two work-arounds are conflictin: we check for the card
	 * type, it is set when probing the ITD1000 */
	if (i2c->fc->dev_type == FC_SKY_REV27)
		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("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(KERN_CONT "rd(");
	else
		printk(KERN_CONT "wr(");
	printk(KERN_CONT "%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(KERN_CONT "%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(KERN_CONT "\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) {
			deb_i2c("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.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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
2add87a9	2	/*
1589a993	3	* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
2add87a9	4	* flexcop-i2c.c - flexcop internal 2Wire bus (I2C) and dvb i2c initialization
1589a993	5	* see flexcop.c for copyright information
2add87a9 JS	6	*/
	7	#include "flexcop.h"
	8
	9	#define FC_MAX_I2C_RETRIES 100000
	10
1589a993 UB	11	static int flexcop_i2c_operation(struct flexcop_device *fc,
1589a993 UB	12	flexcop_ibi_value *r100)
2add87a9	13	{
bdc78001	14	int i;
2add87a9 JS	15	flexcop_ibi_value r;
	16
	17	r100->tw_sm_c_100.working_start = 1;
	18	deb_i2c("r100 before: %08x\n",r100->raw);
	19
	20	fc->write_ibi_reg(fc, tw_sm_c_100, ibi_zero);
	21	fc->write_ibi_reg(fc, tw_sm_c_100, r100); / initiating i2c operation */
	22
	23	for (i = 0; i < FC_MAX_I2C_RETRIES; i++) {
	24	r = fc->read_ibi_reg(fc, tw_sm_c_100);
	25
	26	if (!r.tw_sm_c_100.no_base_addr_ack_error) {
1589a993	27	if (r.tw_sm_c_100.st_done) {
2add87a9 JS	28	*r100 = r;
	29	deb_i2c("i2c success\n");
	30	return 0;
	31	}
	32	} else {
	33	deb_i2c("suffering from an i2c ack_error\n");
bdc78001	34	return -EREMOTEIO;
2add87a9 JS	35	}
2add87a9 JS	36	}
d9942ad0 MCC	37	deb_i2c("tried %d times i2c operation, never finished or too many ack errors.\n",
d9942ad0 MCC	38	i);
2add87a9 JS	39	return -EREMOTEIO;
	40	}
	41
6394cf53	42	static int flexcop_i2c_read4(struct flexcop_i2c_adapter *i2c,
1589a993	43	flexcop_ibi_value r100, u8 *buf)
2add87a9 JS	44	{
2add87a9 JS	45	flexcop_ibi_value r104;
1589a993 UB	46	int len = r100.tw_sm_c_100.total_bytes,
1589a993 UB	47	/* remember total_bytes is buflen-1 */
2add87a9 JS	48	ret;
2add87a9 JS	49
1662070a PB	50	/* work-around to have CableStar2 and SkyStar2 rev 2.7 work
	51	* correctly:
	52	*
	53	* the ITD1000 is behind an i2c-gate which closes automatically
	54	* after an i2c-transaction the STV0297 needs 2 consecutive reads
	55	* one with no_base_addr = 0 and one with 1
	56	*
	57	* those two work-arounds are conflictin: we check for the card
	58	* type, it is set when probing the ITD1000 */
	59	if (i2c->fc->dev_type == FC_SKY_REV27)
	60	r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
	61
6394cf53	62	ret = flexcop_i2c_operation(i2c->fc, &r100);
11c6c7fb AS	63	if (ret != 0) {
	64	deb_i2c("Retrying operation\n");
	65	r100.tw_sm_c_100.no_base_addr_ack_error = i2c->no_base_addr;
	66	ret = flexcop_i2c_operation(i2c->fc, &r100);
	67	}
6394cf53 PB	68	if (ret != 0) {
	69	deb_i2c("read failed. %d\n", ret);
	70	return ret;
bdc78001	71	}
2add87a9	72
2add87a9 JS	73	buf[0] = r100.tw_sm_c_100.data1_reg;
2add87a9 JS	74
bdc78001	75	if (len > 0) {
6394cf53 PB	76	r104 = i2c->fc->read_ibi_reg(i2c->fc, tw_sm_c_104);
6394cf53 PB	77	deb_i2c("read: r100: %08x, r104: %08x\n", r100.raw, r104.raw);
bdc78001 JS	78
	79	/* there is at least one more byte, otherwise we wouldn't be here */
	80	buf[1] = r104.tw_sm_c_104.data2_reg;
	81	if (len > 1) buf[2] = r104.tw_sm_c_104.data3_reg;
	82	if (len > 2) buf[3] = r104.tw_sm_c_104.data4_reg;
	83	}
2add87a9 JS	84	return 0;
	85	}
	86
1589a993 UB	87	static int flexcop_i2c_write4(struct flexcop_device *fc,
1589a993 UB	88	flexcop_ibi_value r100, u8 *buf)
2add87a9 JS	89	{
	90	flexcop_ibi_value r104;
	91	int len = r100.tw_sm_c_100.total_bytes; /* remember total_bytes is buflen-1 */
	92	r104.raw = 0;
	93
	94	/* there is at least one byte, otherwise we wouldn't be here */
	95	r100.tw_sm_c_100.data1_reg = buf[0];
2add87a9 JS	96	r104.tw_sm_c_104.data2_reg = len > 0 ? buf[1] : 0;
	97	r104.tw_sm_c_104.data3_reg = len > 1 ? buf[2] : 0;
	98	r104.tw_sm_c_104.data4_reg = len > 2 ? buf[3] : 0;
	99
6394cf53	100	deb_i2c("write: r100: %08x, r104: %08x\n", r100.raw, r104.raw);
2add87a9 JS	101
2add87a9 JS	102	/* write the additional i2c data before doing the actual i2c operation */
6394cf53 PB	103	fc->write_ibi_reg(fc, tw_sm_c_104, r104);
6394cf53 PB	104	return flexcop_i2c_operation(fc, &r100);
bdc78001 JS	105	}
bdc78001 JS	106
6394cf53	107	int flexcop_i2c_request(struct flexcop_i2c_adapter *i2c,
1589a993	108	flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
bdc78001 JS	109	{
bdc78001 JS	110	int ret;
6394cf53 PB	111
	112	#ifdef DUMP_I2C_MESSAGES
	113	int i;
	114	#endif
	115
bdc78001 JS	116	u16 bytes_to_transfer;
	117	flexcop_ibi_value r100;
	118
	119	deb_i2c("op = %d\n",op);
	120	r100.raw = 0;
	121	r100.tw_sm_c_100.chipaddr = chipaddr;
	122	r100.tw_sm_c_100.twoWS_rw = op;
6394cf53 PB	123	r100.tw_sm_c_100.twoWS_port_reg = i2c->port;
	124
	125	#ifdef DUMP_I2C_MESSAGES
	126	printk(KERN_DEBUG "%d ", i2c->port);
	127	if (op == FC_READ)
7887d371	128	printk(KERN_CONT "rd(");
6394cf53	129	else
7887d371 MCC	130	printk(KERN_CONT "wr(");
7887d371 MCC	131	printk(KERN_CONT "%02x): %02x ", chipaddr, addr);
6394cf53 PB	132	#endif
	133
	134	/* in that case addr is the only value ->
	135	* we write it twice as baseaddr and val0
	136	* BBTI is doing it like that for ISL6421 at least */
	137	if (i2c->no_base_addr && len == 0 && op == FC_WRITE) {
	138	buf = &addr;
	139	len = 1;
	140	}
bdc78001 JS	141
	142	while (len != 0) {
	143	bytes_to_transfer = len > 4 ? 4 : len;
2add87a9	144
bdc78001 JS	145	r100.tw_sm_c_100.total_bytes = bytes_to_transfer - 1;
	146	r100.tw_sm_c_100.baseaddr = addr;
	147
	148	if (op == FC_READ)
6394cf53	149	ret = flexcop_i2c_read4(i2c, r100, buf);
bdc78001	150	else
6394cf53 PB	151	ret = flexcop_i2c_write4(i2c->fc, r100, buf);
	152
	153	#ifdef DUMP_I2C_MESSAGES
	154	for (i = 0; i < bytes_to_transfer; i++)
7887d371	155	printk(KERN_CONT "%02x ", buf[i]);
6394cf53	156	#endif
bdc78001 JS	157
	158	if (ret < 0)
	159	return ret;
	160
	161	buf += bytes_to_transfer;
	162	addr += bytes_to_transfer;
	163	len -= bytes_to_transfer;
6394cf53 PB	164	}
	165
	166	#ifdef DUMP_I2C_MESSAGES
7887d371	167	printk(KERN_CONT "\n");
6394cf53	168	#endif
bdc78001 JS	169
bdc78001 JS	170	return 0;
2add87a9	171	}
bdc78001 JS	172	/* exported for PCI i2c */
bdc78001 JS	173	EXPORT_SYMBOL(flexcop_i2c_request);
2add87a9 JS	174
2add87a9 JS	175	/* master xfer callback for demodulator */
1589a993 UB	176	static int flexcop_master_xfer(struct i2c_adapter *i2c_adap,
1589a993 UB	177	struct i2c_msg msgs[], int num)
2add87a9	178	{
6394cf53	179	struct flexcop_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
2add87a9 JS	180	int i, ret = 0;
2add87a9 JS	181
6175e487 TP	182	/* Some drivers use 1 byte or 0 byte reads as probes, which this
	183	* driver doesn't support. These probes will always fail, so this
	184	* hack makes them always succeed. If one knew how, it would of
	185	* course be better to actually do the read. */
	186	if (num == 1 && msgs[0].flags == I2C_M_RD && msgs[0].len <= 1)
	187	return 1;
	188
6394cf53	189	if (mutex_lock_interruptible(&i2c->fc->i2c_mutex))
2add87a9 JS	190	return -ERESTARTSYS;
2add87a9 JS	191
6394cf53 PB	192	for (i = 0; i < num; i++) {
	193	/* reading */
	194	if (i+1 < num && (msgs[i+1].flags == I2C_M_RD)) {
	195	ret = i2c->fc->i2c_request(i2c, FC_READ, msgs[i].addr,
1589a993 UB	196	msgs[i].buf[0], msgs[i+1].buf,
1589a993 UB	197	msgs[i+1].len);
6394cf53 PB	198	i++; /* skip the following message */
	199	} else /* writing */
	200	ret = i2c->fc->i2c_request(i2c, FC_WRITE, msgs[i].addr,
1589a993 UB	201	msgs[i].buf[0], &msgs[i].buf[1],
1589a993 UB	202	msgs[i].len - 1);
6394cf53	203	if (ret < 0) {
302e8acc	204	deb_i2c("i2c master_xfer failed");
2add87a9 JS	205	break;
2add87a9 JS	206	}
2add87a9 JS	207	}
2add87a9 JS	208
6394cf53	209	mutex_unlock(&i2c->fc->i2c_mutex);
2add87a9	210
6394cf53 PB	211	if (ret == 0)
6394cf53 PB	212	ret = num;
2add87a9 JS	213	return ret;
	214	}
	215
2add87a9 JS	216	static u32 flexcop_i2c_func(struct i2c_adapter *adapter)
	217	{
	218	return I2C_FUNC_I2C;
	219	}
	220
	221	static struct i2c_algorithm flexcop_algo = {
2add87a9 JS	222	.master_xfer = flexcop_master_xfer,
	223	.functionality = flexcop_i2c_func,
	224	};
	225
	226	int flexcop_i2c_init(struct flexcop_device *fc)
	227	{
	228	int ret;
3593cab5	229	mutex_init(&fc->i2c_mutex);
2add87a9	230
6394cf53 PB	231	fc->fc_i2c_adap[0].fc = fc;
	232	fc->fc_i2c_adap[1].fc = fc;
	233	fc->fc_i2c_adap[2].fc = fc;
6394cf53 PB	234	fc->fc_i2c_adap[0].port = FC_I2C_PORT_DEMOD;
	235	fc->fc_i2c_adap[1].port = FC_I2C_PORT_EEPROM;
	236	fc->fc_i2c_adap[2].port = FC_I2C_PORT_TUNER;
	237
1d434012	238	strlcpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
1589a993	239	sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
1d434012	240	strlcpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
1589a993	241	sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
1d434012	242	strlcpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
1589a993	243	sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
6394cf53 PB	244
	245	i2c_set_adapdata(&fc->fc_i2c_adap[0].i2c_adap, &fc->fc_i2c_adap[0]);
	246	i2c_set_adapdata(&fc->fc_i2c_adap[1].i2c_adap, &fc->fc_i2c_adap[1]);
	247	i2c_set_adapdata(&fc->fc_i2c_adap[2].i2c_adap, &fc->fc_i2c_adap[2]);
	248
6394cf53 PB	249	fc->fc_i2c_adap[0].i2c_adap.algo =
	250	fc->fc_i2c_adap[1].i2c_adap.algo =
	251	fc->fc_i2c_adap[2].i2c_adap.algo = &flexcop_algo;
	252	fc->fc_i2c_adap[0].i2c_adap.algo_data =
	253	fc->fc_i2c_adap[1].i2c_adap.algo_data =
	254	fc->fc_i2c_adap[2].i2c_adap.algo_data = NULL;
	255	fc->fc_i2c_adap[0].i2c_adap.dev.parent =
	256	fc->fc_i2c_adap[1].i2c_adap.dev.parent =
	257	fc->fc_i2c_adap[2].i2c_adap.dev.parent = fc->dev;
	258
	259	ret = i2c_add_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	260	if (ret < 0)
	261	return ret;
2add87a9	262
6394cf53 PB	263	ret = i2c_add_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	264	if (ret < 0)
	265	goto adap_1_failed;
2add87a9	266
6394cf53 PB	267	ret = i2c_add_adapter(&fc->fc_i2c_adap[2].i2c_adap);
	268	if (ret < 0)
	269	goto adap_2_failed;
2add87a9 JS	270
	271	fc->init_state \|= FC_STATE_I2C_INIT;
	272	return 0;
6394cf53 PB	273
	274	adap_2_failed:
	275	i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	276	adap_1_failed:
	277	i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
6394cf53	278	return ret;
2add87a9 JS	279	}
	280
	281	void flexcop_i2c_exit(struct flexcop_device *fc)
	282	{
6394cf53 PB	283	if (fc->init_state & FC_STATE_I2C_INIT) {
	284	i2c_del_adapter(&fc->fc_i2c_adap[2].i2c_adap);
	285	i2c_del_adapter(&fc->fc_i2c_adap[1].i2c_adap);
	286	i2c_del_adapter(&fc->fc_i2c_adap[0].i2c_adap);
	287	}
2add87a9 JS	288	fc->init_state &= ~FC_STATE_I2C_INIT;
2add87a9 JS	289	}