cregit-Linux how code gets into the kernel

Release 4.11 drivers/media/i2c/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.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>

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


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


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


#define BT856_REG_OFFSET	0xDA

#define BT856_NR_REG		6


struct bt856 {
	
struct v4l2_subdev sd;
	
unsigned char reg[BT856_NR_REG];

	
v4l2_std_id norm;
};


static inline struct bt856 *to_bt856(struct v4l2_subdev *sd) { return container_of(sd, struct bt856, sd); }

Contributors

PersonTokensPropCommitsCommitProp
Hans Verkuil25100.00%1100.00%
Total25100.00%1100.00%

/* ----------------------------------------------------------------------- */
static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value) { struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); encoder->reg[reg - BT856_REG_OFFSET] = value; return i2c_smbus_write_byte_data(client, reg, value); }

Contributors

PersonTokensPropCommitsCommitProp
Ronald S. Bultje2853.85%125.00%
Linus Torvalds1426.92%125.00%
Hans Verkuil1019.23%250.00%
Total52100.00%4100.00%


static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value) { return bt856_write(encoder, reg, (encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) | (value ? (1 << bit) : 0)); }

Contributors

PersonTokensPropCommitsCommitProp
Ronald S. Bultje4271.19%125.00%
Linus Torvalds1322.03%125.00%
Hans Verkuil46.78%250.00%
Total59100.00%4100.00%


static void bt856_dump(struct bt856 *encoder) { int i; v4l2_info(&encoder->sd, "register dump:\n"); for (i = 0; i < BT856_NR_REG; i += 2) printk(KERN_CONT " %02x", encoder->reg[i]); printk(KERN_CONT "\n"); }

Contributors

PersonTokensPropCommitsCommitProp
Ronald S. Bultje2849.12%114.29%
Hans Verkuil1119.30%228.57%
Frank Davis610.53%114.29%
Linus Torvalds610.53%114.29%
Jean Delvare35.26%114.29%
Greg Kroah-Hartman35.26%114.29%
Total57100.00%7100.00%

/* ----------------------------------------------------------------------- */
static int bt856_init(struct v4l2_subdev *sd, u32 arg) { struct bt856 *encoder = to_bt856(sd); /* This is just for testing!!! */ v4l2_dbg(1, debug, sd, "init\n"); bt856_write(encoder, 0xdc, 0x18); bt856_write(encoder, 0xda, 0); bt856_write(encoder, 0xde, 0); bt856_setbit(encoder, 0xdc, 3, 1); /*bt856_setbit(encoder, 0xdc, 6, 0);*/ bt856_setbit(encoder, 0xdc, 4, 1); if (encoder->norm & V4L2_STD_NTSC) bt856_setbit(encoder, 0xdc, 2, 0); else bt856_setbit(encoder, 0xdc, 2, 1); bt856_setbit(encoder, 0xdc, 1, 1); bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); if (debug != 0) bt856_dump(encoder); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds7042.68%114.29%
Ronald S. Bultje5432.93%114.29%
Hans Verkuil3219.51%342.86%
Frank Davis42.44%114.29%
Greg Kroah-Hartman42.44%114.29%
Total164100.00%7100.00%


static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) { struct bt856 *encoder = to_bt856(sd); v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); if (std & V4L2_STD_NTSC) { bt856_setbit(encoder, 0xdc, 2, 0); } else if (std & V4L2_STD_PAL) { bt856_setbit(encoder, 0xdc, 2, 1); bt856_setbit(encoder, 0xda, 0, 0); /*bt856_setbit(encoder, 0xda, 0, 1);*/ } else { return -EINVAL; } encoder->norm = std; if (debug != 0) bt856_dump(encoder); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hans Verkuil5747.50%466.67%
Linus Torvalds5142.50%116.67%
Ronald S. Bultje1210.00%116.67%
Total120100.00%6100.00%


static int bt856_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config) { struct bt856 *encoder = to_bt856(sd); v4l2_dbg(1, debug, sd, "set input %d\n", input); /* We only have video bus. * input= 0: input is from bt819 * input= 1: input is from ZR36060 */ switch (input) { case 0: bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); bt856_setbit(encoder, 0xdc, 3, 1); bt856_setbit(encoder, 0xdc, 6, 0); break; case 1: bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); bt856_setbit(encoder, 0xdc, 3, 1); bt856_setbit(encoder, 0xdc, 6, 1); break; case 2: /* Color bar */ bt856_setbit(encoder, 0xdc, 3, 0); bt856_setbit(encoder, 0xde, 4, 1); break; default: return -EINVAL; } if (debug != 0) bt856_dump(encoder); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ronald S. Bultje12565.10%116.67%
Hans Verkuil4825.00%466.67%
Linus Torvalds199.90%116.67%
Total192100.00%6100.00%

/* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops bt856_core_ops = { .init = bt856_init, }; static const struct v4l2_subdev_video_ops bt856_video_ops = { .s_std_output = bt856_s_std_output, .s_routing = bt856_s_routing, }; static const struct v4l2_subdev_ops bt856_ops = { .core = &bt856_core_ops, .video = &bt856_video_ops, }; /* ----------------------------------------------------------------------- */
static int bt856_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct bt856 *encoder; struct v4l2_subdev *sd; /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); if (encoder == NULL) return -ENOMEM; sd = &encoder->sd; v4l2_i2c_subdev_init(sd, client, &bt856_ops); encoder->norm = V4L2_STD_NTSC; bt856_write(encoder, 0xdc, 0x18); bt856_write(encoder, 0xda, 0); bt856_write(encoder, 0xde, 0); bt856_setbit(encoder, 0xdc, 3, 1); /*bt856_setbit(encoder, 0xdc, 6, 0);*/ bt856_setbit(encoder, 0xdc, 4, 1); if (encoder->norm & V4L2_STD_NTSC) bt856_setbit(encoder, 0xdc, 2, 0); else bt856_setbit(encoder, 0xdc, 2, 1); bt856_setbit(encoder, 0xdc, 1, 1); bt856_setbit(encoder, 0xde, 4, 0); bt856_setbit(encoder, 0xde, 3, 1); if (debug != 0) bt856_dump(encoder); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ronald S. Bultje10643.80%116.67%
Linus Torvalds7229.75%116.67%
Hans Verkuil5623.14%350.00%
Laurent Pinchart83.31%116.67%
Total242100.00%6100.00%


static int bt856_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hans Verkuil1758.62%250.00%
Linus Torvalds620.69%125.00%
Ronald S. Bultje620.69%125.00%
Total29100.00%4100.00%

static const struct i2c_device_id bt856_id[] = { { "bt856", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, bt856_id); static struct i2c_driver bt856_driver = { .driver = { .name = "bt856", }, .probe = bt856_probe, .remove = bt856_remove, .id_table = bt856_id, }; module_i2c_driver(bt856_driver);

Overall Contributors

PersonTokensPropCommitsCommitProp
Ronald S. Bultje44538.90%15.00%
Hans Verkuil35330.86%735.00%
Linus Torvalds29025.35%210.00%
Frank Davis201.75%210.00%
Jean Delvare90.79%15.00%
Laurent Pinchart80.70%15.00%
Greg Kroah-Hartman80.70%15.00%
Andrew Morton40.35%15.00%
Tejun Heo30.26%15.00%
Axel Lin20.17%15.00%
Sakari Ailus10.09%15.00%
Mauro Carvalho Chehab10.09%15.00%
Total1144100.00%20100.00%
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