[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/pci.h>
#include <linux/signal.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/sched.h>
#include <linux/types.h>

#include <linux/videodev.h>
#include <asm/uaccess.h>

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

#include <linux/i2c.h>

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

#include <linux/video_encoder.h>

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 == 0)
		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
1da177e4 LT	1	/*
	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>
	40	#include <linux/pci.h>
	41	#include <linux/signal.h>
	42	#include <asm/io.h>
	43	#include <asm/pgtable.h>
	44	#include <asm/page.h>
	45	#include <linux/sched.h>
1da177e4 LT	46	#include <linux/types.h>
	47
	48	#include <linux/videodev.h>
	49	#include <asm/uaccess.h>
	50
	51	MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
	52	MODULE_AUTHOR("Mike Bernson & Dave Perks");
	53	MODULE_LICENSE("GPL");
	54
	55	#include <linux/i2c.h>
1da177e4 LT	56
	57	#define I2C_NAME(s) (s)->name
	58
	59	#include <linux/video_encoder.h>
	60
	61	static int debug = 0;
	62	module_param(debug, int, 0);
	63	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	64
	65	#define dprintk(num, format, args...) \
	66	do { \
	67	if (debug >= num) \
	68	printk(format, ##args); \
	69	} while (0)
	70
	71	/* ----------------------------------------------------------------------- */
	72
f49a5eae JD	73	#define REG_OFFSET 0xDA
f49a5eae JD	74	#define BT856_NR_REG 6
1da177e4 LT	75
1da177e4 LT	76	struct bt856 {
f49a5eae	77	unsigned char reg[BT856_NR_REG];
1da177e4 LT	78
	79	int norm;
	80	int enable;
1da177e4 LT	81	};
	82
	83	#define I2C_BT856 0x88
	84
	85	/* ----------------------------------------------------------------------- */
	86
	87	static inline int
	88	bt856_write (struct i2c_client *client,
	89	u8 reg,
	90	u8 value)
	91	{
	92	struct bt856 *encoder = i2c_get_clientdata(client);
	93
	94	encoder->reg[reg - REG_OFFSET] = value;
	95	return i2c_smbus_write_byte_data(client, reg, value);
	96	}
	97
	98	static inline int
	99	bt856_setbit (struct i2c_client *client,
	100	u8 reg,
	101	u8 bit,
	102	u8 value)
	103	{
	104	struct bt856 *encoder = i2c_get_clientdata(client);
	105
	106	return bt856_write(client, reg,
	107	(encoder->
	108	reg[reg - REG_OFFSET] & ~(1 << bit)) \|
	109	(value ? (1 << bit) : 0));
	110	}
	111
	112	static void
	113	bt856_dump (struct i2c_client *client)
	114	{
	115	int i;
	116	struct bt856 *encoder = i2c_get_clientdata(client);
	117
	118	printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
f49a5eae JD	119	for (i = 0; i < BT856_NR_REG; i += 2)
f49a5eae JD	120	printk(" %02x", encoder->reg[i]);
1da177e4 LT	121	printk("\n");
	122	}
	123
	124	/* ----------------------------------------------------------------------- */
	125
	126	static int
	127	bt856_command (struct i2c_client *client,
	128	unsigned int cmd,
	129	void *arg)
	130	{
	131	struct bt856 *encoder = i2c_get_clientdata(client);
	132
	133	switch (cmd) {
	134
	135	case 0:
	136	/* This is just for testing!!! */
	137	dprintk(1, KERN_INFO "bt856: init\n");
	138	bt856_write(client, 0xdc, 0x18);
	139	bt856_write(client, 0xda, 0);
	140	bt856_write(client, 0xde, 0);
	141
	142	bt856_setbit(client, 0xdc, 3, 1);
	143	//bt856_setbit(client, 0xdc, 6, 0);
	144	bt856_setbit(client, 0xdc, 4, 1);
	145
	146	switch (encoder->norm) {
	147
	148	case VIDEO_MODE_NTSC:
	149	bt856_setbit(client, 0xdc, 2, 0);
	150	break;
	151
	152	case VIDEO_MODE_PAL:
	153	bt856_setbit(client, 0xdc, 2, 1);
	154	break;
	155	}
	156
	157	bt856_setbit(client, 0xdc, 1, 1);
	158	bt856_setbit(client, 0xde, 4, 0);
	159	bt856_setbit(client, 0xde, 3, 1);
	160	if (debug != 0)
	161	bt856_dump(client);
	162	break;
	163
	164	case ENCODER_GET_CAPABILITIES:
	165	{
	166	struct video_encoder_capability *cap = arg;
	167
	168	dprintk(1, KERN_INFO "%s: get capabilities\n",
	169	I2C_NAME(client));
	170
	171	cap->flags = VIDEO_ENCODER_PAL \|
	172	VIDEO_ENCODER_NTSC \|
	173	VIDEO_ENCODER_CCIR;
	174	cap->inputs = 2;
	175	cap->outputs = 1;
	176	}
	177	break;
	178
	179	case ENCODER_SET_NORM:
	180	{
	181	int *iarg = arg;
	182
	183	dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
	184	*iarg);
185
186	switch (*iarg) {
187
188	case VIDEO_MODE_NTSC:
189	bt856_setbit(client, 0xdc, 2, 0);
190	break;
191
192	case VIDEO_MODE_PAL:
193	bt856_setbit(client, 0xdc, 2, 1);
194	bt856_setbit(client, 0xda, 0, 0);
195	//bt856_setbit(client, 0xda, 0, 1);
196	break;
197
198	default:
199	return -EINVAL;
200
201	}
202	encoder->norm = *iarg;
203	if (debug != 0)
204	bt856_dump(client);
205	}
206	break;
207
208	case ENCODER_SET_INPUT:
209	{
210	int *iarg = arg;
211
212	dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
213	*iarg);
214
215	/* We only have video bus.
216	* iarg = 0: input is from bt819
217	* iarg = 1: input is from ZR36060 */
218
219	switch (*iarg) {
220
221	case 0:
222	bt856_setbit(client, 0xde, 4, 0);
223	bt856_setbit(client, 0xde, 3, 1);
224	bt856_setbit(client, 0xdc, 3, 1);
225	bt856_setbit(client, 0xdc, 6, 0);
226	break;
227	case 1:
228	bt856_setbit(client, 0xde, 4, 0);
229	bt856_setbit(client, 0xde, 3, 1);
230	bt856_setbit(client, 0xdc, 3, 1);
231	bt856_setbit(client, 0xdc, 6, 1);
232	break;
233	case 2: // Color bar
234	bt856_setbit(client, 0xdc, 3, 0);
235	bt856_setbit(client, 0xde, 4, 1);
236	break;
237	default:
238	return -EINVAL;
239
240	}
241
242	if (debug != 0)
243	bt856_dump(client);
244	}
245	break;
246
247	case ENCODER_SET_OUTPUT:
248	{
249	int *iarg = arg;
250
251	dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
252	*iarg);
253
254	/* not much choice of outputs */
255	if (*iarg != 0) {
256	return -EINVAL;
257	}
258	}
259	break;
260
261	case ENCODER_ENABLE_OUTPUT:
262	{
263	int *iarg = arg;
264
265	encoder->enable = !!*iarg;
266
267	dprintk(1, KERN_INFO "%s: enable output %d\n",
268	I2C_NAME(client), encoder->enable);
269	}
270	break;
271
272	default:
273	return -EINVAL;
274	}
275
276	return 0;
277	}
278
279	/* ----------------------------------------------------------------------- */
280
281	/*
282	* Generic i2c probe
283	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
284	*/
285	static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
1da177e4	286
68cc9d0b	287	static unsigned short ignore = I2C_CLIENT_END;
1da177e4 LT	288
	289	static struct i2c_client_address_data addr_data = {
	290	.normal_i2c = normal_i2c,
68cc9d0b JD	291	.probe = &ignore,
68cc9d0b JD	292	.ignore = &ignore,
1da177e4 LT	293	};
	294
	295	static struct i2c_driver i2c_driver_bt856;
	296
	297	static int
	298	bt856_detect_client (struct i2c_adapter *adapter,
	299	int address,
	300	int kind)
	301	{
	302	int i;
	303	struct i2c_client *client;
	304	struct bt856 *encoder;
	305
	306	dprintk(1,
	307	KERN_INFO
	308	"bt856.c: detecting bt856 client on address 0x%x\n",
	309	address << 1);
	310
	311	/* Check if the adapter supports the needed features */
	312	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	313	return 0;
	314
7408187d	315	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
1da177e4 LT	316	if (client == 0)
1da177e4 LT	317	return -ENOMEM;
1da177e4 LT	318	client->addr = address;
	319	client->adapter = adapter;
	320	client->driver = &i2c_driver_bt856;
1da177e4 LT	321	strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
1da177e4 LT	322
7408187d	323	encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
1da177e4 LT	324	if (encoder == NULL) {
	325	kfree(client);
	326	return -ENOMEM;
	327	}
1da177e4 LT	328	encoder->norm = VIDEO_MODE_NTSC;
	329	encoder->enable = 1;
	330	i2c_set_clientdata(client, encoder);
	331
	332	i = i2c_attach_client(client);
	333	if (i) {
	334	kfree(client);
	335	kfree(encoder);
	336	return i;
	337	}
	338
	339	bt856_write(client, 0xdc, 0x18);
	340	bt856_write(client, 0xda, 0);
	341	bt856_write(client, 0xde, 0);
	342
	343	bt856_setbit(client, 0xdc, 3, 1);
	344	//bt856_setbit(client, 0xdc, 6, 0);
	345	bt856_setbit(client, 0xdc, 4, 1);
	346
	347	switch (encoder->norm) {
	348
	349	case VIDEO_MODE_NTSC:
	350	bt856_setbit(client, 0xdc, 2, 0);
	351	break;
	352
	353	case VIDEO_MODE_PAL:
	354	bt856_setbit(client, 0xdc, 2, 1);
	355	break;
	356	}
	357
	358	bt856_setbit(client, 0xdc, 1, 1);
	359	bt856_setbit(client, 0xde, 4, 0);
	360	bt856_setbit(client, 0xde, 3, 1);
	361
	362	if (debug != 0)
	363	bt856_dump(client);
	364
	365	dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
	366	client->addr << 1);
	367
	368	return 0;
	369	}
	370
	371	static int
	372	bt856_attach_adapter (struct i2c_adapter *adapter)
	373	{
	374	dprintk(1,
	375	KERN_INFO
	376	"bt856.c: starting probe for adapter %s (0x%x)\n",
	377	I2C_NAME(adapter), adapter->id);
	378	return i2c_probe(adapter, &addr_data, &bt856_detect_client);
	379	}
	380
	381	static int
	382	bt856_detach_client (struct i2c_client *client)
	383	{
	384	struct bt856 *encoder = i2c_get_clientdata(client);
	385	int err;
	386
	387	err = i2c_detach_client(client);
	388	if (err) {
	389	return err;
	390	}
	391
392	kfree(encoder);
393	kfree(client);
394
395	return 0;
396	}
397
398	/* ----------------------------------------------------------------------- */
399
400	static struct i2c_driver i2c_driver_bt856 = {
604f28e2	401	.driver = {
604f28e2 LR	402	.name = "bt856",
604f28e2 LR	403	},
1da177e4 LT	404
1da177e4 LT	405	.id = I2C_DRIVERID_BT856,
1da177e4 LT	406
	407	.attach_adapter = bt856_attach_adapter,
	408	.detach_client = bt856_detach_client,
	409	.command = bt856_command,
	410	};
	411
	412	static int __init
	413	bt856_init (void)
	414	{
	415	return i2c_add_driver(&i2c_driver_bt856);
	416	}
	417
	418	static void __exit
	419	bt856_exit (void)
	420	{
	421	i2c_del_driver(&i2c_driver_bt856);
	422	}
	423
	424	module_init(bt856_init);
	425	module_exit(bt856_exit);