[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / bt856.c

/*
 * bt856 - BT856A Digital Video Encoder (Rockwell Part)
 *
 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * Modifications for LML33/DC10plus unified driver
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 *
 * This code was modify/ported from the saa7111 driver written
 * by Dave Perks.
 *
 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *   - moved over to linux>=2.4.x i2c protocol (9/9/2002)
 *
 * 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, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/signal.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/video_encoder.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/uaccess.h>

#include <linux/videodev.h>

MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
MODULE_AUTHOR("Mike Bernson & Dave Perks");
MODULE_LICENSE("GPL");


#define I2C_NAME(s) (s)->name


static int debug = 0;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");

#define dprintk(num, format, args...) \
	do { \
		if (debug >= num) \
			printk(format, ##args); \
	} while (0)

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

#define REG_OFFSET	0xDA
#define BT856_NR_REG	6

struct bt856 {
	unsigned char reg[BT856_NR_REG];

	int norm;
	int enable;
};

#define   I2C_BT856        0x88

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

static inline int
bt856_write (struct i2c_client *client,
	     u8                 reg,
	     u8                 value)
{
	struct bt856 *encoder = i2c_get_clientdata(client);

	encoder->reg[reg - REG_OFFSET] = value;
	return i2c_smbus_write_byte_data(client, reg, value);
}

static inline int
bt856_setbit (struct i2c_client *client,
	      u8                 reg,
	      u8                 bit,
	      u8                 value)
{
	struct bt856 *encoder = i2c_get_clientdata(client);

	return bt856_write(client, reg,
			   (encoder->
			    reg[reg - REG_OFFSET] & ~(1 << bit)) |
			    (value ? (1 << bit) : 0));
}

static void
bt856_dump (struct i2c_client *client)
{
	int i;
	struct bt856 *encoder = i2c_get_clientdata(client);

	printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
	for (i = 0; i < BT856_NR_REG; i += 2)
		printk(" %02x", encoder->reg[i]);
	printk("\n");
}

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

static int
bt856_command (struct i2c_client *client,
	       unsigned int       cmd,
	       void              *arg)
{
	struct bt856 *encoder = i2c_get_clientdata(client);

	switch (cmd) {

	case 0:
		/* This is just for testing!!! */
		dprintk(1, KERN_INFO "bt856: init\n");
		bt856_write(client, 0xdc, 0x18);
		bt856_write(client, 0xda, 0);
		bt856_write(client, 0xde, 0);

		bt856_setbit(client, 0xdc, 3, 1);
		//bt856_setbit(client, 0xdc, 6, 0);
		bt856_setbit(client, 0xdc, 4, 1);

		switch (encoder->norm) {

		case VIDEO_MODE_NTSC:
			bt856_setbit(client, 0xdc, 2, 0);
			break;

		case VIDEO_MODE_PAL:
			bt856_setbit(client, 0xdc, 2, 1);
			break;
		}

		bt856_setbit(client, 0xdc, 1, 1);
		bt856_setbit(client, 0xde, 4, 0);
		bt856_setbit(client, 0xde, 3, 1);
		if (debug != 0)
			bt856_dump(client);
		break;

	case ENCODER_GET_CAPABILITIES:
	{
		struct video_encoder_capability *cap = arg;

		dprintk(1, KERN_INFO "%s: get capabilities\n",
			I2C_NAME(client));

		cap->flags = VIDEO_ENCODER_PAL |
			     VIDEO_ENCODER_NTSC |
			     VIDEO_ENCODER_CCIR;
		cap->inputs = 2;
		cap->outputs = 1;
	}
		break;

	case ENCODER_SET_NORM:
	{
		int *iarg = arg;

		dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
			*iarg);

		switch (*iarg) {

		case VIDEO_MODE_NTSC:
			bt856_setbit(client, 0xdc, 2, 0);
			break;

		case VIDEO_MODE_PAL:
			bt856_setbit(client, 0xdc, 2, 1);
			bt856_setbit(client, 0xda, 0, 0);
			//bt856_setbit(client, 0xda, 0, 1);
			break;

		default:
			return -EINVAL;

		}
		encoder->norm = *iarg;
		if (debug != 0)
			bt856_dump(client);
	}
		break;

	case ENCODER_SET_INPUT:
	{
		int *iarg = arg;

		dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
			*iarg);

		/* We only have video bus.
		 * iarg = 0: input is from bt819
		 * iarg = 1: input is from ZR36060 */

		switch (*iarg) {

		case 0:
			bt856_setbit(client, 0xde, 4, 0);
			bt856_setbit(client, 0xde, 3, 1);
			bt856_setbit(client, 0xdc, 3, 1);
			bt856_setbit(client, 0xdc, 6, 0);
			break;
		case 1:
			bt856_setbit(client, 0xde, 4, 0);
			bt856_setbit(client, 0xde, 3, 1);
			bt856_setbit(client, 0xdc, 3, 1);
			bt856_setbit(client, 0xdc, 6, 1);
			break;
		case 2:	// Color bar
			bt856_setbit(client, 0xdc, 3, 0);
			bt856_setbit(client, 0xde, 4, 1);
			break;
		default:
			return -EINVAL;

		}

		if (debug != 0)
			bt856_dump(client);
	}
		break;

	case ENCODER_SET_OUTPUT:
	{
		int *iarg = arg;

		dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
			*iarg);

		/* not much choice of outputs */
		if (*iarg != 0) {
			return -EINVAL;
		}
	}
		break;

	case ENCODER_ENABLE_OUTPUT:
	{
		int *iarg = arg;

		encoder->enable = !!*iarg;

		dprintk(1, KERN_INFO "%s: enable output %d\n",
			I2C_NAME(client), encoder->enable);
	}
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

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

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */
static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };

static unsigned short ignore = I2C_CLIENT_END;

static struct i2c_client_address_data addr_data = {
	.normal_i2c		= normal_i2c,
	.probe			= &ignore,
	.ignore			= &ignore,
};

static struct i2c_driver i2c_driver_bt856;

static int
bt856_detect_client (struct i2c_adapter *adapter,
		     int                 address,
		     int                 kind)
{
	int i;
	struct i2c_client *client;
	struct bt856 *encoder;

	dprintk(1,
		KERN_INFO
		"bt856.c: detecting bt856 client on address 0x%x\n",
		address << 1);

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return 0;

	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (!client)
		return -ENOMEM;
	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver_bt856;
	strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));

	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
	if (encoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	encoder->norm = VIDEO_MODE_NTSC;
	encoder->enable = 1;
	i2c_set_clientdata(client, encoder);

	i = i2c_attach_client(client);
	if (i) {
		kfree(client);
		kfree(encoder);
		return i;
	}

	bt856_write(client, 0xdc, 0x18);
	bt856_write(client, 0xda, 0);
	bt856_write(client, 0xde, 0);

	bt856_setbit(client, 0xdc, 3, 1);
	//bt856_setbit(client, 0xdc, 6, 0);
	bt856_setbit(client, 0xdc, 4, 1);

	switch (encoder->norm) {

	case VIDEO_MODE_NTSC:
		bt856_setbit(client, 0xdc, 2, 0);
		break;

	case VIDEO_MODE_PAL:
		bt856_setbit(client, 0xdc, 2, 1);
		break;
	}

	bt856_setbit(client, 0xdc, 1, 1);
	bt856_setbit(client, 0xde, 4, 0);
	bt856_setbit(client, 0xde, 3, 1);

	if (debug != 0)
		bt856_dump(client);

	dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
		client->addr << 1);

	return 0;
}

static int
bt856_attach_adapter (struct i2c_adapter *adapter)
{
	dprintk(1,
		KERN_INFO
		"bt856.c: starting probe for adapter %s (0x%x)\n",
		I2C_NAME(adapter), adapter->id);
	return i2c_probe(adapter, &addr_data, &bt856_detect_client);
}

static int
bt856_detach_client (struct i2c_client *client)
{
	struct bt856 *encoder = i2c_get_clientdata(client);
	int err;

	err = i2c_detach_client(client);
	if (err) {
		return err;
	}

	kfree(encoder);
	kfree(client);

	return 0;
}

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

static struct i2c_driver i2c_driver_bt856 = {
	.driver = {
		.name = "bt856",
	},

	.id = I2C_DRIVERID_BT856,

	.attach_adapter = bt856_attach_adapter,
	.detach_client = bt856_detach_client,
	.command = bt856_command,
};

static int __init
bt856_init (void)
{
	return i2c_add_driver(&i2c_driver_bt856);
}

static void __exit
bt856_exit (void)
{
	i2c_del_driver(&i2c_driver_bt856);
}

module_init(bt856_init);
module_exit(bt856_exit);
Commit	Line	Data
d56410e0	1	/*
1da177e4 LT	2	* bt856 - BT856A Digital Video Encoder (Rockwell Part)
	3	*
	4	* Copyright (C) 1999 Mike Bernson <mike@mlb.org>
	5	* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
	6	*
	7	* Modifications for LML33/DC10plus unified driver
	8	* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
	9	*
	10	* This code was modify/ported from the saa7111 driver written
	11	* by Dave Perks.
	12	*
	13	* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
	14	* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
	15	*
	16	* This program is free software; you can redistribute it and/or modify
	17	* it under the terms of the GNU General Public License as published by
	18	* the Free Software Foundation; either version 2 of the License, or
	19	* (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	29	*/
	30
	31	#include <linux/module.h>
	32	#include <linux/init.h>
	33	#include <linux/delay.h>
	34	#include <linux/errno.h>
	35	#include <linux/fs.h>
	36	#include <linux/kernel.h>
	37	#include <linux/major.h>
	38	#include <linux/slab.h>
	39	#include <linux/mm.h>
1da177e4	40	#include <linux/signal.h>
18f3fa1e MCC	41	#include <linux/types.h>
	42	#include <linux/i2c.h>
	43	#include <linux/video_encoder.h>
1da177e4 LT	44	#include <asm/io.h>
	45	#include <asm/pgtable.h>
	46	#include <asm/page.h>
18f3fa1e	47	#include <asm/uaccess.h>
1da177e4 LT	48
1da177e4 LT	49	#include <linux/videodev.h>
1da177e4 LT	50
	51	MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
	52	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	53	MODULE_LICENSE("GPL");
	54
1da177e4 LT	55
	56	#define I2C_NAME(s) (s)->name
	57
1da177e4 LT	58
	59	static int debug = 0;
	60	module_param(debug, int, 0);
	61	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	62
	63	#define dprintk(num, format, args...) \
	64	do { \
	65	if (debug >= num) \
	66	printk(format, ##args); \
	67	} while (0)
	68
	69	/* ----------------------------------------------------------------------- */
	70
f49a5eae JD	71	#define REG_OFFSET 0xDA
f49a5eae JD	72	#define BT856_NR_REG 6
1da177e4 LT	73
1da177e4 LT	74	struct bt856 {
f49a5eae	75	unsigned char reg[BT856_NR_REG];
1da177e4 LT	76
	77	int norm;
	78	int enable;
1da177e4 LT	79	};
	80
	81	#define I2C_BT856 0x88
	82
	83	/* ----------------------------------------------------------------------- */
	84
	85	static inline int
	86	bt856_write (struct i2c_client *client,
	87	u8 reg,
	88	u8 value)
	89	{
	90	struct bt856 *encoder = i2c_get_clientdata(client);
	91
	92	encoder->reg[reg - REG_OFFSET] = value;
	93	return i2c_smbus_write_byte_data(client, reg, value);
	94	}
	95
	96	static inline int
	97	bt856_setbit (struct i2c_client *client,
	98	u8 reg,
	99	u8 bit,
	100	u8 value)
	101	{
	102	struct bt856 *encoder = i2c_get_clientdata(client);
	103
	104	return bt856_write(client, reg,
	105	(encoder->
	106	reg[reg - REG_OFFSET] & ~(1 << bit)) \|
	107	(value ? (1 << bit) : 0));
	108	}
	109
	110	static void
	111	bt856_dump (struct i2c_client *client)
	112	{
	113	int i;
	114	struct bt856 *encoder = i2c_get_clientdata(client);
	115
	116	printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
f49a5eae JD	117	for (i = 0; i < BT856_NR_REG; i += 2)
f49a5eae JD	118	printk(" %02x", encoder->reg[i]);
1da177e4 LT	119	printk("\n");
	120	}
	121
	122	/* ----------------------------------------------------------------------- */
	123
	124	static int
	125	bt856_command (struct i2c_client *client,
	126	unsigned int cmd,
	127	void *arg)
	128	{
	129	struct bt856 *encoder = i2c_get_clientdata(client);
	130
	131	switch (cmd) {
	132
	133	case 0:
	134	/* This is just for testing!!! */
	135	dprintk(1, KERN_INFO "bt856: init\n");
	136	bt856_write(client, 0xdc, 0x18);
	137	bt856_write(client, 0xda, 0);
	138	bt856_write(client, 0xde, 0);
	139
	140	bt856_setbit(client, 0xdc, 3, 1);
	141	//bt856_setbit(client, 0xdc, 6, 0);
	142	bt856_setbit(client, 0xdc, 4, 1);
	143
	144	switch (encoder->norm) {
	145
	146	case VIDEO_MODE_NTSC:
	147	bt856_setbit(client, 0xdc, 2, 0);
	148	break;
	149
	150	case VIDEO_MODE_PAL:
	151	bt856_setbit(client, 0xdc, 2, 1);
	152	break;
	153	}
	154
	155	bt856_setbit(client, 0xdc, 1, 1);
	156	bt856_setbit(client, 0xde, 4, 0);
	157	bt856_setbit(client, 0xde, 3, 1);
	158	if (debug != 0)
	159	bt856_dump(client);
	160	break;
	161
	162	case ENCODER_GET_CAPABILITIES:
	163	{
	164	struct video_encoder_capability *cap = arg;
	165
	166	dprintk(1, KERN_INFO "%s: get capabilities\n",
	167	I2C_NAME(client));
	168
	169	cap->flags = VIDEO_ENCODER_PAL \|
	170	VIDEO_ENCODER_NTSC \|
	171	VIDEO_ENCODER_CCIR;
	172	cap->inputs = 2;
	173	cap->outputs = 1;
	174	}
	175	break;
	176
	177	case ENCODER_SET_NORM:
	178	{
	179	int *iarg = arg;
	180
	181	dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
	182	*iarg);
183
184	switch (*iarg) {
185
186	case VIDEO_MODE_NTSC:
187	bt856_setbit(client, 0xdc, 2, 0);
188	break;
189
190	case VIDEO_MODE_PAL:
191	bt856_setbit(client, 0xdc, 2, 1);
192	bt856_setbit(client, 0xda, 0, 0);
193	//bt856_setbit(client, 0xda, 0, 1);
194	break;
195
196	default:
197	return -EINVAL;
198
199	}
200	encoder->norm = *iarg;
201	if (debug != 0)
202	bt856_dump(client);
203	}
204	break;
205
206	case ENCODER_SET_INPUT:
207	{
208	int *iarg = arg;
209
210	dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
211	*iarg);
212
213	/* We only have video bus.
214	* iarg = 0: input is from bt819
215	* iarg = 1: input is from ZR36060 */
216
217	switch (*iarg) {
218
219	case 0:
220	bt856_setbit(client, 0xde, 4, 0);
221	bt856_setbit(client, 0xde, 3, 1);
222	bt856_setbit(client, 0xdc, 3, 1);
223	bt856_setbit(client, 0xdc, 6, 0);
224	break;
225	case 1:
226	bt856_setbit(client, 0xde, 4, 0);
227	bt856_setbit(client, 0xde, 3, 1);
228	bt856_setbit(client, 0xdc, 3, 1);
229	bt856_setbit(client, 0xdc, 6, 1);
230	break;
231	case 2: // Color bar
232	bt856_setbit(client, 0xdc, 3, 0);
233	bt856_setbit(client, 0xde, 4, 1);
234	break;
235	default:
236	return -EINVAL;
237
238	}
239
240	if (debug != 0)
241	bt856_dump(client);
242	}
243	break;
244
245	case ENCODER_SET_OUTPUT:
246	{
247	int *iarg = arg;
248
249	dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
250	*iarg);
251
252	/* not much choice of outputs */
253	if (*iarg != 0) {
254	return -EINVAL;
255	}
256	}
257	break;
258
259	case ENCODER_ENABLE_OUTPUT:
260	{
261	int *iarg = arg;
262
263	encoder->enable = !!*iarg;
264
265	dprintk(1, KERN_INFO "%s: enable output %d\n",
266	I2C_NAME(client), encoder->enable);
267	}
268	break;
269
270	default:
271	return -EINVAL;
272	}
273
274	return 0;
275	}
276
277	/* ----------------------------------------------------------------------- */
278
279	/*
280	* Generic i2c probe
281	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
282	*/
283	static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
1da177e4	284
68cc9d0b	285	static unsigned short ignore = I2C_CLIENT_END;
d56410e0	286
1da177e4 LT	287	static struct i2c_client_address_data addr_data = {
1da177e4 LT	288	.normal_i2c = normal_i2c,
68cc9d0b JD	289	.probe = &ignore,
68cc9d0b JD	290	.ignore = &ignore,
1da177e4 LT	291	};
	292
	293	static struct i2c_driver i2c_driver_bt856;
	294
	295	static int
	296	bt856_detect_client (struct i2c_adapter *adapter,
	297	int address,
	298	int kind)
	299	{
	300	int i;
	301	struct i2c_client *client;
	302	struct bt856 *encoder;
	303
	304	dprintk(1,
	305	KERN_INFO
	306	"bt856.c: detecting bt856 client on address 0x%x\n",
	307	address << 1);
	308
	309	/* Check if the adapter supports the needed features */
	310	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	311	return 0;
	312
7408187d	313	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
5fa1247a	314	if (!client)
1da177e4	315	return -ENOMEM;
1da177e4 LT	316	client->addr = address;
	317	client->adapter = adapter;
	318	client->driver = &i2c_driver_bt856;
1da177e4 LT	319	strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
1da177e4 LT	320
7408187d	321	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
1da177e4 LT	322	if (encoder == NULL) {
	323	kfree(client);
	324	return -ENOMEM;
	325	}
1da177e4 LT	326	encoder->norm = VIDEO_MODE_NTSC;
	327	encoder->enable = 1;
	328	i2c_set_clientdata(client, encoder);
	329
	330	i = i2c_attach_client(client);
	331	if (i) {
	332	kfree(client);
	333	kfree(encoder);
	334	return i;
	335	}
	336
	337	bt856_write(client, 0xdc, 0x18);
	338	bt856_write(client, 0xda, 0);
	339	bt856_write(client, 0xde, 0);
	340
	341	bt856_setbit(client, 0xdc, 3, 1);
	342	//bt856_setbit(client, 0xdc, 6, 0);
	343	bt856_setbit(client, 0xdc, 4, 1);
	344
	345	switch (encoder->norm) {
	346
	347	case VIDEO_MODE_NTSC:
	348	bt856_setbit(client, 0xdc, 2, 0);
	349	break;
	350
	351	case VIDEO_MODE_PAL:
	352	bt856_setbit(client, 0xdc, 2, 1);
	353	break;
	354	}
	355
	356	bt856_setbit(client, 0xdc, 1, 1);
	357	bt856_setbit(client, 0xde, 4, 0);
	358	bt856_setbit(client, 0xde, 3, 1);
	359
	360	if (debug != 0)
	361	bt856_dump(client);
	362
	363	dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
	364	client->addr << 1);
	365
	366	return 0;
	367	}
	368
	369	static int
	370	bt856_attach_adapter (struct i2c_adapter *adapter)
	371	{
	372	dprintk(1,
	373	KERN_INFO
	374	"bt856.c: starting probe for adapter %s (0x%x)\n",
	375	I2C_NAME(adapter), adapter->id);
	376	return i2c_probe(adapter, &addr_data, &bt856_detect_client);
	377	}
	378
	379	static int
	380	bt856_detach_client (struct i2c_client *client)
	381	{
	382	struct bt856 *encoder = i2c_get_clientdata(client);
	383	int err;
	384
	385	err = i2c_detach_client(client);
	386	if (err) {
	387	return err;
	388	}
	389
390	kfree(encoder);
391	kfree(client);
392
393	return 0;
394	}
395
396	/* ----------------------------------------------------------------------- */
397
398	static struct i2c_driver i2c_driver_bt856 = {
604f28e2	399	.driver = {
604f28e2 LR	400	.name = "bt856",
604f28e2 LR	401	},
1da177e4 LT	402
1da177e4 LT	403	.id = I2C_DRIVERID_BT856,
1da177e4 LT	404
	405	.attach_adapter = bt856_attach_adapter,
	406	.detach_client = bt856_detach_client,
	407	.command = bt856_command,
	408	};
	409
	410	static int __init
	411	bt856_init (void)
	412	{
	413	return i2c_add_driver(&i2c_driver_bt856);
	414	}
	415
	416	static void __exit
	417	bt856_exit (void)
	418	{
	419	i2c_del_driver(&i2c_driver_bt856);
	420	}
	421
	422	module_init(bt856_init);
	423	module_exit(bt856_exit);