[linux-2.6-block.git] / drivers / media / usb / tm6000 / tm6000-i2c.c

// SPDX-License-Identifier: GPL-2.0
// tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
//
// Copyright (c) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
//
// Copyright (c) 2007 Michel Ludwig <michel.ludwig@gmail.com>
//	- Fix SMBus Read Byte command

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/i2c.h>

#include "tm6000.h"
#include "tm6000-regs.h"
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include "tuner-xc2028.h"


/* ----------------------------------------------------------- */

static unsigned int i2c_debug;
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");

#define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \
			printk(KERN_DEBUG "%s at %s: " fmt, \
			dev->name, __func__, ##args); } while (0)

static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
				__u8 reg, char *buf, int len)
{
	int rc;
	unsigned int i2c_packet_limit = 16;

	if (dev->dev_type == TM6010)
		i2c_packet_limit = 80;

	if (!buf)
		return -1;

	if (len < 1 || len > i2c_packet_limit) {
		printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
			len, i2c_packet_limit);
		return -1;
	}

	/* capture mutex */
	rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
		USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
		addr | reg << 8, 0, buf, len);

	if (rc < 0) {
		/* release mutex */
		return rc;
	}

	/* release mutex */
	return rc;
}

/* Generic read - doesn't work fine with 16bit registers */
static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
				__u8 reg, char *buf, int len)
{
	int rc;
	u8 b[2];
	unsigned int i2c_packet_limit = 16;

	if (dev->dev_type == TM6010)
		i2c_packet_limit = 64;

	if (!buf)
		return -1;

	if (len < 1 || len > i2c_packet_limit) {
		printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
			len, i2c_packet_limit);
		return -1;
	}

	/* capture mutex */
	if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
		/*
		 * Workaround an I2C bug when reading from zl10353
		 */
		reg -= 1;
		len += 1;

		rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len);

		*buf = b[1];
	} else {
		rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
	}

	/* release mutex */
	return rc;
}

/*
 * read from a 16bit register
 * for example xc2028, xc3028 or xc3028L
 */
static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
				  __u16 reg, char *buf, int len)
{
	int rc;
	unsigned char ureg;

	if (!buf || len != 2)
		return -1;

	/* capture mutex */
	if (dev->dev_type == TM6010) {
		ureg = reg & 0xFF;
		rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
			USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
			addr | (reg & 0xFF00), 0, &ureg, 1);

		if (rc < 0) {
			/* release mutex */
			return rc;
		}

		rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
			USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
			reg, 0, buf, len);
	} else {
		rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
			USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
			addr, reg, buf, len);
	}

	/* release mutex */
	return rc;
}

static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
			   struct i2c_msg msgs[], int num)
{
	struct tm6000_core *dev = i2c_adap->algo_data;
	int addr, rc, i, byte;

	if (num <= 0)
		return 0;
	for (i = 0; i < num; i++) {
		addr = (msgs[i].addr << 1) & 0xff;
		i2c_dprintk(2, "%s %s addr=0x%x len=%d:",
			 (msgs[i].flags & I2C_M_RD) ? "read" : "write",
			 i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
		if (msgs[i].flags & I2C_M_RD) {
			/* read request without preceding register selection */
			/*
			 * The TM6000 only supports a read transaction
			 * immediately after a 1 or 2 byte write to select
			 * a register.  We cannot fulfil this request.
			 */
			i2c_dprintk(2, " read without preceding write not supported");
			rc = -EOPNOTSUPP;
			goto err;
		} else if (i + 1 < num && msgs[i].len <= 2 &&
			   (msgs[i + 1].flags & I2C_M_RD) &&
			   msgs[i].addr == msgs[i + 1].addr) {
			/* 1 or 2 byte write followed by a read */
			if (i2c_debug >= 2)
				for (byte = 0; byte < msgs[i].len; byte++)
					printk(KERN_CONT " %02x", msgs[i].buf[byte]);
			i2c_dprintk(2, "; joined to read %s len=%d:",
				    i == num - 2 ? "stop" : "nonstop",
				    msgs[i + 1].len);

			if (msgs[i].len == 2) {
				rc = tm6000_i2c_recv_regs16(dev, addr,
					msgs[i].buf[0] << 8 | msgs[i].buf[1],
					msgs[i + 1].buf, msgs[i + 1].len);
			} else {
				rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
					msgs[i + 1].buf, msgs[i + 1].len);
			}

			i++;

			if (addr == dev->tuner_addr << 1) {
				tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
				tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
			}
			if (i2c_debug >= 2)
				for (byte = 0; byte < msgs[i].len; byte++)
					printk(KERN_CONT " %02x", msgs[i].buf[byte]);
		} else {
			/* write bytes */
			if (i2c_debug >= 2)
				for (byte = 0; byte < msgs[i].len; byte++)
					printk(KERN_CONT " %02x", msgs[i].buf[byte]);
			rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
				msgs[i].buf + 1, msgs[i].len - 1);
		}
		if (i2c_debug >= 2)
			printk(KERN_CONT "\n");
		if (rc < 0)
			goto err;
	}

	return num;
err:
	i2c_dprintk(2, " ERROR: %i\n", rc);
	return rc;
}

static int tm6000_i2c_eeprom(struct tm6000_core *dev)
{
	int i, rc;
	unsigned char *p = dev->eedata;
	unsigned char bytes[17];

	dev->i2c_client.addr = 0xa0 >> 1;
	dev->eedata_size = 0;

	bytes[16] = '\0';
	for (i = 0; i < sizeof(dev->eedata); ) {
		*p = i;
		rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
		if (rc < 1) {
			if (p == dev->eedata)
				goto noeeprom;
			else {
				printk(KERN_WARNING
				"%s: i2c eeprom read error (err=%d)\n",
				dev->name, rc);
			}
			return -EINVAL;
		}
		dev->eedata_size++;
		p++;
		if (0 == (i % 16))
			printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
		printk(KERN_CONT " %02x", dev->eedata[i]);
		if ((dev->eedata[i] >= ' ') && (dev->eedata[i] <= 'z'))
			bytes[i%16] = dev->eedata[i];
		else
			bytes[i%16] = '.';

		i++;

		if (0 == (i % 16)) {
			bytes[16] = '\0';
			printk(KERN_CONT "  %s\n", bytes);
		}
	}
	if (0 != (i%16)) {
		bytes[i%16] = '\0';
		for (i %= 16; i < 16; i++)
			printk(KERN_CONT "   ");
		printk(KERN_CONT "  %s\n", bytes);
	}

	return 0;

noeeprom:
	printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
	       dev->name, rc);
	return -EINVAL;
}

/* ----------------------------------------------------------- */

/*
 * functionality()
 */
static u32 functionality(struct i2c_adapter *adap)
{
	return I2C_FUNC_SMBUS_EMUL;
}

static const struct i2c_algorithm tm6000_algo = {
	.master_xfer   = tm6000_i2c_xfer,
	.functionality = functionality,
};

/* ----------------------------------------------------------- */

/*
 * tm6000_i2c_register()
 * register i2c bus
 */
int tm6000_i2c_register(struct tm6000_core *dev)
{
	int rc;

	dev->i2c_adap.owner = THIS_MODULE;
	dev->i2c_adap.algo = &tm6000_algo;
	dev->i2c_adap.dev.parent = &dev->udev->dev;
	strlcpy(dev->i2c_adap.name, dev->name, sizeof(dev->i2c_adap.name));
	dev->i2c_adap.algo_data = dev;
	i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
	rc = i2c_add_adapter(&dev->i2c_adap);
	if (rc)
		return rc;

	dev->i2c_client.adapter = &dev->i2c_adap;
	strlcpy(dev->i2c_client.name, "tm6000 internal", I2C_NAME_SIZE);
	tm6000_i2c_eeprom(dev);

	return 0;
}

/*
 * tm6000_i2c_unregister()
 * unregister i2c_bus
 */
int tm6000_i2c_unregister(struct tm6000_core *dev)
{
	i2c_del_adapter(&dev->i2c_adap);
	return 0;
}
Commit	Line	Data
75d1e3ef MCC	1	// SPDX-License-Identifier: GPL-2.0
	2	// tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
	3	//
	4	// Copyright (c) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
	5	//
	6	// Copyright (c) 2007 Michel Ludwig <michel.ludwig@gmail.com>
	7	// - Fix SMBus Read Byte command
9701dc94 MCC	8
	9	#include <linux/module.h>
	10	#include <linux/kernel.h>
	11	#include <linux/usb.h>
	12	#include <linux/i2c.h>
	13
	14	#include "tm6000.h"
	15	#include "tm6000-regs.h"
	16	#include <media/v4l2-common.h>
	17	#include <media/tuner.h>
	18	#include "tuner-xc2028.h"
	19
	20
9701dc94 MCC	21	/* ----------------------------------------------------------- */
9701dc94 MCC	22
d7fe4a60	23	static unsigned int i2c_debug;
9701dc94 MCC	24	module_param(i2c_debug, int, 0644);
	25	MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
	26
52e0a72a	27	#define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \
9701dc94	28	printk(KERN_DEBUG "%s at %s: " fmt, \
0f063c68	29	dev->name, __func__, ##args); } while (0)
9701dc94	30
4e11502d SR	31	static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
	32	__u8 reg, char *buf, int len)
	33	{
20dead8d	34	int rc;
20dead8d DB	35	unsigned int i2c_packet_limit = 16;
	36
	37	if (dev->dev_type == TM6010)
3874cd77	38	i2c_packet_limit = 80;
20dead8d DB	39
	40	if (!buf)
	41	return -1;
	42
	43	if (len < 1 \|\| len > i2c_packet_limit) {
	44	printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
	45	len, i2c_packet_limit);
	46	return -1;
	47	}
	48
	49	/* capture mutex */
	50	rc = tm6000_read_write_usb(dev, USB_DIR_OUT \| USB_TYPE_VENDOR \|
	51	USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
	52	addr \| reg << 8, 0, buf, len);
	53
	54	if (rc < 0) {
	55	/* release mutex */
	56	return rc;
	57	}
	58
20dead8d DB	59	/* release mutex */
20dead8d DB	60	return rc;
4e11502d SR	61	}
	62
	63	/* Generic read - doesn't work fine with 16bit registers */
	64	static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
	65	__u8 reg, char *buf, int len)
	66	{
	67	int rc;
02512fe3	68	u8 b[2];
20dead8d DB	69	unsigned int i2c_packet_limit = 16;
	70
	71	if (dev->dev_type == TM6010)
	72	i2c_packet_limit = 64;
	73
	74	if (!buf)
	75	return -1;
	76
	77	if (len < 1 \|\| len > i2c_packet_limit) {
	78	printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
	79	len, i2c_packet_limit);
	80	return -1;
	81	}
4e11502d	82
20dead8d	83	/* capture mutex */
02512fe3 SR	84	if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
	85	/*
	86	* Workaround an I2C bug when reading from zl10353
	87	*/
	88	reg -= 1;
	89	len += 1;
	90
	91	rc = tm6000_read_write_usb(dev, USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	92	REQ_16_SET_GET_I2C_WR1_RDN, addr \| reg << 8, 0, b, len);
	93
	94	*buf = b[1];
	95	} else {
	96	rc = tm6000_read_write_usb(dev, USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
4e11502d	97	REQ_16_SET_GET_I2C_WR1_RDN, addr \| reg << 8, 0, buf, len);
02512fe3	98	}
4e11502d	99
20dead8d	100	/* release mutex */
4e11502d SR	101	return rc;
	102	}
	103
	104	/*
	105	* read from a 16bit register
	106	* for example xc2028, xc3028 or xc3028L
	107	*/
	108	static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
	109	__u16 reg, char *buf, int len)
	110	{
20dead8d DB	111	int rc;
	112	unsigned char ureg;
	113
	114	if (!buf \|\| len != 2)
	115	return -1;
	116
	117	/* capture mutex */
	118	if (dev->dev_type == TM6010) {
	119	ureg = reg & 0xFF;
	120	rc = tm6000_read_write_usb(dev, USB_DIR_OUT \| USB_TYPE_VENDOR \|
	121	USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
	122	addr \| (reg & 0xFF00), 0, &ureg, 1);
	123
	124	if (rc < 0) {
	125	/* release mutex */
	126	return rc;
	127	}
	128
20dead8d DB	129	rc = tm6000_read_write_usb(dev, USB_DIR_IN \| USB_TYPE_VENDOR \|
	130	USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
	131	reg, 0, buf, len);
	132	} else {
	133	rc = tm6000_read_write_usb(dev, USB_DIR_IN \| USB_TYPE_VENDOR \|
	134	USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
	135	addr, reg, buf, len);
	136	}
	137
	138	/* release mutex */
	139	return rc;
4e11502d SR	140	}
4e11502d SR	141
9701dc94 MCC	142	static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
	143	struct i2c_msg msgs[], int num)
	144	{
	145	struct tm6000_core *dev = i2c_adap->algo_data;
	146	int addr, rc, i, byte;
	147
	148	if (num <= 0)
	149	return 0;
	150	for (i = 0; i < num; i++) {
e30b9d6c	151	addr = (msgs[i].addr << 1) & 0xff;
52e0a72a	152	i2c_dprintk(2, "%s %s addr=0x%x len=%d:",
9701dc94 MCC	153	(msgs[i].flags & I2C_M_RD) ? "read" : "write",
9701dc94 MCC	154	i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
427f7fac	155	if (msgs[i].flags & I2C_M_RD) {
e30b9d6c CP	156	/* read request without preceding register selection */
	157	/*
	158	* The TM6000 only supports a read transaction
	159	* immediately after a 1 or 2 byte write to select
	160	* a register. We cannot fulfil this request.
	161	*/
68616504	162	i2c_dprintk(2, " read without preceding write not supported");
e30b9d6c CP	163	rc = -EOPNOTSUPP;
	164	goto err;
	165	} else if (i + 1 < num && msgs[i].len <= 2 &&
	166	(msgs[i + 1].flags & I2C_M_RD) &&
	167	msgs[i].addr == msgs[i + 1].addr) {
	168	/* 1 or 2 byte write followed by a read */
	169	if (i2c_debug >= 2)
	170	for (byte = 0; byte < msgs[i].len; byte++)
45dbf0db	171	printk(KERN_CONT " %02x", msgs[i].buf[byte]);
e30b9d6c CP	172	i2c_dprintk(2, "; joined to read %s len=%d:",
	173	i == num - 2 ? "stop" : "nonstop",
	174	msgs[i + 1].len);
4e11502d SR	175
	176	if (msgs[i].len == 2) {
	177	rc = tm6000_i2c_recv_regs16(dev, addr,
	178	msgs[i].buf[0] << 8 \| msgs[i].buf[1],
	179	msgs[i + 1].buf, msgs[i + 1].len);
	180	} else {
	181	rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
	182	msgs[i + 1].buf, msgs[i + 1].len);
	183	}
	184
cf9e1509	185	i++;
20cabed4	186
685b1229	187	if (addr == dev->tuner_addr << 1) {
f1434f4e SR	188	tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
f1434f4e SR	189	tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
20cabed4	190	}
e30b9d6c CP	191	if (i2c_debug >= 2)
e30b9d6c CP	192	for (byte = 0; byte < msgs[i].len; byte++)
45dbf0db	193	printk(KERN_CONT " %02x", msgs[i].buf[byte]);
9701dc94 MCC	194	} else {
9701dc94 MCC	195	/* write bytes */
e30b9d6c	196	if (i2c_debug >= 2)
9701dc94	197	for (byte = 0; byte < msgs[i].len; byte++)
45dbf0db	198	printk(KERN_CONT " %02x", msgs[i].buf[byte]);
4e11502d	199	rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
e30b9d6c	200	msgs[i].buf + 1, msgs[i].len - 1);
9701dc94	201	}
e30b9d6c	202	if (i2c_debug >= 2)
45dbf0db	203	printk(KERN_CONT "\n");
9701dc94 MCC	204	if (rc < 0)
	205	goto err;
	206	}
	207
	208	return num;
	209	err:
52e0a72a	210	i2c_dprintk(2, " ERROR: %i\n", rc);
9701dc94 MCC	211	return rc;
	212	}
	213
792bc09a	214	static int tm6000_i2c_eeprom(struct tm6000_core *dev)
9701dc94 MCC	215	{
9701dc94 MCC	216	int i, rc;
792bc09a	217	unsigned char *p = dev->eedata;
9701dc94 MCC	218	unsigned char bytes[17];
	219
	220	dev->i2c_client.addr = 0xa0 >> 1;
792bc09a	221	dev->eedata_size = 0;
9701dc94	222
d4e15bcd	223	bytes[16] = '\0';
792bc09a MCC	224	for (i = 0; i < sizeof(dev->eedata); ) {
	225	*p = i;
	226	rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
d4e15bcd	227	if (rc < 1) {
792bc09a	228	if (p == dev->eedata)
d4e15bcd MCC	229	goto noeeprom;
d4e15bcd MCC	230	else {
9701dc94 MCC	231	printk(KERN_WARNING
	232	"%s: i2c eeprom read error (err=%d)\n",
	233	dev->name, rc);
	234	}
792bc09a	235	return -EINVAL;
9701dc94	236	}
792bc09a	237	dev->eedata_size++;
9701dc94 MCC	238	p++;
	239	if (0 == (i % 16))
	240	printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
45dbf0db	241	printk(KERN_CONT " %02x", dev->eedata[i]);
792bc09a MCC	242	if ((dev->eedata[i] >= ' ') && (dev->eedata[i] <= 'z'))
792bc09a MCC	243	bytes[i%16] = dev->eedata[i];
52e0a72a TT	244	else
52e0a72a TT	245	bytes[i%16] = '.';
d4e15bcd MCC	246
	247	i++;
	248
	249	if (0 == (i % 16)) {
	250	bytes[16] = '\0';
45dbf0db	251	printk(KERN_CONT " %s\n", bytes);
9701dc94 MCC	252	}
9701dc94 MCC	253	}
d4e15bcd MCC	254	if (0 != (i%16)) {
	255	bytes[i%16] = '\0';
	256	for (i %= 16; i < 16; i++)
45dbf0db MCC	257	printk(KERN_CONT " ");
45dbf0db MCC	258	printk(KERN_CONT " %s\n", bytes);
9701dc94	259	}
d4e15bcd	260
9701dc94	261	return 0;
d4e15bcd MCC	262
	263	noeeprom:
	264	printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
792bc09a MCC	265	dev->name, rc);
792bc09a MCC	266	return -EINVAL;
9701dc94 MCC	267	}
	268
	269	/* ----------------------------------------------------------- */
	270
9701dc94 MCC	271	/*
	272	* functionality()
	273	*/
	274	static u32 functionality(struct i2c_adapter *adap)
	275	{
	276	return I2C_FUNC_SMBUS_EMUL;
	277	}
	278
7bd444ed	279	static const struct i2c_algorithm tm6000_algo = {
9701dc94	280	.master_xfer = tm6000_i2c_xfer,
9701dc94 MCC	281	.functionality = functionality,
	282	};
	283
9701dc94 MCC	284	/* ----------------------------------------------------------- */
9701dc94 MCC	285
9701dc94 MCC	286	/*
	287	* tm6000_i2c_register()
	288	* register i2c bus
	289	*/
	290	int tm6000_i2c_register(struct tm6000_core *dev)
	291	{
7bd444ed	292	int rc;
d4e15bcd	293
7bd444ed JD	294	dev->i2c_adap.owner = THIS_MODULE;
7bd444ed JD	295	dev->i2c_adap.algo = &tm6000_algo;
9701dc94	296	dev->i2c_adap.dev.parent = &dev->udev->dev;
7bd444ed	297	strlcpy(dev->i2c_adap.name, dev->name, sizeof(dev->i2c_adap.name));
9701dc94	298	dev->i2c_adap.algo_data = dev;
7bd444ed JD	299	i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
	300	rc = i2c_add_adapter(&dev->i2c_adap);
	301	if (rc)
	302	return rc;
9701dc94	303
9701dc94	304	dev->i2c_client.adapter = &dev->i2c_adap;
7bd444ed	305	strlcpy(dev->i2c_client.name, "tm6000 internal", I2C_NAME_SIZE);
792bc09a	306	tm6000_i2c_eeprom(dev);
d4e15bcd	307
9701dc94 MCC	308	return 0;
	309	}
	310
	311	/*
	312	* tm6000_i2c_unregister()
	313	* unregister i2c_bus
	314	*/
	315	int tm6000_i2c_unregister(struct tm6000_core *dev)
	316	{
	317	i2c_del_adapter(&dev->i2c_adap);
	318	return 0;
	319	}