244 lines
6.1 KiB
C
244 lines
6.1 KiB
C
/*
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bt866 - BT866 Digital Video Encoder (Rockwell Part)
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Copyright (C) 1999 Mike Bernson <mike@mlb.org>
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Copyright (C) 1998 Dave Perks <dperks@ibm.net>
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Modifications for LML33/DC10plus unified driver
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Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
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This code was modify/ported from the saa7111 driver written
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by Dave Perks.
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This code was adapted for the bt866 by Christer Weinigel and ported
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to 2.6 by Martin Samuelsson.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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MODULE_DESCRIPTION("Brooktree-866 video encoder driver");
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MODULE_AUTHOR("Mike Bernson & Dave Perks");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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/* ----------------------------------------------------------------------- */
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struct bt866 {
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struct v4l2_subdev sd;
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u8 reg[256];
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};
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static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct bt866, sd);
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}
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static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);
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u8 buffer[2];
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int err;
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buffer[0] = subaddr;
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buffer[1] = data;
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encoder->reg[subaddr] = data;
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v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);
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for (err = 0; err < 3;) {
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if (i2c_master_send(client, buffer, 2) == 2)
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break;
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err++;
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v4l_warn(client, "error #%d writing to 0x%02x\n",
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err, subaddr);
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schedule_timeout_interruptible(msecs_to_jiffies(100));
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}
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if (err == 3) {
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v4l_warn(client, "giving up\n");
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return -1;
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}
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return 0;
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}
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static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
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{
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v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
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/* Only PAL supported by this driver at the moment! */
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if (!(std & V4L2_STD_NTSC))
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return -EINVAL;
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return 0;
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}
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static int bt866_s_routing(struct v4l2_subdev *sd,
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u32 input, u32 output, u32 config)
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{
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static const __u8 init[] = {
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0xc8, 0xcc, /* CRSCALE */
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0xca, 0x91, /* CBSCALE */
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0xcc, 0x24, /* YC16 | OSDNUM */
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0xda, 0x00, /* */
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0xdc, 0x24, /* SETMODE | PAL */
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0xde, 0x02, /* EACTIVE */
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/* overlay colors */
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0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */
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0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */
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0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */
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0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */
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0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */
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0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */
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0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */
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0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */
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0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */
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0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */
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0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */
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0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */
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0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */
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0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */
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0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */
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0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */
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};
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struct bt866 *encoder = to_bt866(sd);
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u8 val;
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int i;
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for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)
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bt866_write(encoder, init[i], init[i+1]);
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val = encoder->reg[0xdc];
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if (input == 0)
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val |= 0x40; /* CBSWAP */
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else
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val &= ~0x40; /* !CBSWAP */
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bt866_write(encoder, 0xdc, val);
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val = encoder->reg[0xcc];
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if (input == 2)
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val |= 0x01; /* OSDBAR */
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else
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val &= ~0x01; /* !OSDBAR */
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bt866_write(encoder, 0xcc, val);
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v4l2_dbg(1, debug, sd, "set input %d\n", input);
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switch (input) {
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case 0:
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case 1:
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case 2:
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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#if 0
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/* Code to setup square pixels, might be of some use in the future,
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but is currently unused. */
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val = encoder->reg[0xdc];
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if (*iarg)
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val |= 1; /* SQUARE */
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else
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val &= ~1; /* !SQUARE */
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bt866_write(client, 0xdc, val);
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#endif
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static int bt866_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_BT866, 0);
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops bt866_core_ops = {
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.g_chip_ident = bt866_g_chip_ident,
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};
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static const struct v4l2_subdev_video_ops bt866_video_ops = {
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.s_std_output = bt866_s_std_output,
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.s_routing = bt866_s_routing,
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};
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static const struct v4l2_subdev_ops bt866_ops = {
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.core = &bt866_core_ops,
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.video = &bt866_video_ops,
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};
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static int bt866_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct bt866 *encoder;
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struct v4l2_subdev *sd;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
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if (encoder == NULL)
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return -ENOMEM;
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sd = &encoder->sd;
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v4l2_i2c_subdev_init(sd, client, &bt866_ops);
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return 0;
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}
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static int bt866_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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kfree(to_bt866(sd));
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return 0;
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}
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static const struct i2c_device_id bt866_id[] = {
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{ "bt866", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, bt866_id);
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static struct i2c_driver bt866_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "bt866",
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},
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.probe = bt866_probe,
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.remove = bt866_remove,
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.id_table = bt866_id,
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};
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module_i2c_driver(bt866_driver);
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