// SPDX-License-Identifier: GPL-2.0-or-later
/*
* bt819 - BT819A VideoStream Decoder ( 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 >
*
* Changes by Ronald Bultje < rbultje @ ronald . bitfreak . net >
* - moved over to linux > = 2 . 4 . x i2c protocol ( 9 / 9 / 2002 )
*
* This code was modify / ported from the saa7111 driver written
* by Dave Perks .
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/ioctl.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/i2c/bt819.h>
MODULE_DESCRIPTION("Brooktree-819 video decoder 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)" );
/* ----------------------------------------------------------------------- */
struct bt819 {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
unsigned char reg[32 ];
v4l2_std_id norm;
int input;
int enable;
};
static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
{
return container_of(sd, struct bt819, sd);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct bt819, hdl)->sd;
}
struct timing {
int hactive;
int hdelay;
int vactive;
int vdelay;
int hscale;
int vscale;
};
/* for values, see the bt819 datasheet */
static struct timing timing_data[] = {
{864 - 24 , 20 , 625 - 2 , 1 , 0 x0504, 0 x0000},
{858 - 24 , 20 , 525 - 2 , 1 , 0 x00f8, 0 x0000},
};
/* ----------------------------------------------------------------------- */
static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
decoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
{
return bt819_write(decoder, reg,
(decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0 ));
}
static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
{
struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
int ret = -1 ;
u8 reg;
/* the bt819 has an autoincrement function, use it if
* the adapter understands raw I2C */
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
/* do raw I2C, not smbus compatible */
u8 block_data[32 ];
int block_len;
while (len >= 2 ) {
block_len = 0 ;
block_data[block_len++] = reg = data[0 ];
do {
block_data[block_len++] =
decoder->reg[reg++] = data[1 ];
len -= 2 ;
data += 2 ;
} while (len >= 2 && data[0 ] == reg && block_len < 32 );
ret = i2c_master_send(client, block_data, block_len);
if (ret < 0 )
break ;
}
} else {
/* do some slow I2C emulation kind of thing */
while (len >= 2 ) {
reg = *data++;
ret = bt819_write(decoder, reg, *data++);
if (ret < 0 )
break ;
len -= 2 ;
}
}
return ret;
}
static inline int bt819_read(struct bt819 *decoder, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
return i2c_smbus_read_byte_data(client, reg);
}
static int bt819_init(struct v4l2_subdev *sd)
{
static unsigned char init[] = {
/*0x1f, 0x00,*/ /* Reset */
0 x01, 0 x59, /* 0x01 input format */
0 x02, 0 x00, /* 0x02 temporal decimation */
0 x03, 0 x12, /* 0x03 Cropping msb */
0 x04, 0 x16, /* 0x04 Vertical Delay, lsb */
0 x05, 0 xe0, /* 0x05 Vertical Active lsb */
0 x06, 0 x80, /* 0x06 Horizontal Delay lsb */
0 x07, 0 xd0, /* 0x07 Horizontal Active lsb */
0 x08, 0 x00, /* 0x08 Horizontal Scaling msb */
0 x09, 0 xf8, /* 0x09 Horizontal Scaling lsb */
0 x0a, 0 x00, /* 0x0a Brightness control */
0 x0b, 0 x30, /* 0x0b Miscellaneous control */
0 x0c, 0 xd8, /* 0x0c Luma Gain lsb */
0 x0d, 0 xfe, /* 0x0d Chroma Gain (U) lsb */
0 x0e, 0 xb4, /* 0x0e Chroma Gain (V) msb */
0 x0f, 0 x00, /* 0x0f Hue control */
0 x12, 0 x04, /* 0x12 Output Format */
0 x13, 0 x20, /* 0x13 Vertical Scaling msb 0x00
chroma comb OFF , line drop scaling , interlace scaling
BUG ? Why does turning the chroma comb on screw up color ?
Bug in the bt819 stepping on my board ?
*/
0 x14, 0 x00, /* 0x14 Vertical Scaling lsb */
0 x16, 0 x07, /* 0x16 Video Timing Polarity
ACTIVE = active low
FIELD : high = odd ,
vreset = active high ,
hreset=active high */
0 x18, 0 x68, /* 0x18 AGC Delay */
0 x19, 0 x5d, /* 0x19 Burst Gate Delay */
0 x1a, 0 x80, /* 0x1a ADC Interface */
};
struct bt819 *decoder = to_bt819(sd);
struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0 ];
init[0 x03 * 2 - 1 ] =
(((timing->vdelay >> 8 ) & 0 x03) << 6 ) |
(((timing->vactive >> 8 ) & 0 x03) << 4 ) |
(((timing->hdelay >> 8 ) & 0 x03) << 2 ) |
((timing->hactive >> 8 ) & 0 x03);
init[0 x04 * 2 - 1 ] = timing->vdelay & 0 xff;
init[0 x05 * 2 - 1 ] = timing->vactive & 0 xff;
init[0 x06 * 2 - 1 ] = timing->hdelay & 0 xff;
init[0 x07 * 2 - 1 ] = timing->hactive & 0 xff;
init[0 x08 * 2 - 1 ] = timing->hscale >> 8 ;
init[0 x09 * 2 - 1 ] = timing->hscale & 0 xff;
/* 0x15 in array is address 0x19 */
init[0 x15 * 2 - 1 ] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93 ; /* Chroma burst delay */
/* reset */
bt819_write(decoder, 0 x1f, 0 x00);
mdelay(1 );
/* init */
return bt819_write_block(decoder, init, sizeof (init));
}
/* ----------------------------------------------------------------------- */
static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
{
struct bt819 *decoder = to_bt819(sd);
int status = bt819_read(decoder, 0 x00);
int res = V4L2_IN_ST_NO_SIGNAL;
v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
if ((status & 0 x80))
res = 0 ;
else
std = V4L2_STD_UNKNOWN;
if ((status & 0 x10))
std &= V4L2_STD_PAL;
else
std &= V4L2_STD_NTSC;
if (pstd)
*pstd = std;
if (pstatus)
*pstatus = res;
v4l2_dbg(1 , debug, sd, "get status %x\n" , status);
return 0 ;
}
static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
return bt819_status(sd, NULL, std);
}
static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
return bt819_status(sd, status, NULL);
}
static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct bt819 *decoder = to_bt819(sd);
struct timing *timing = NULL;
v4l2_dbg(1 , debug, sd, "set norm %llx\n" , (unsigned long long )std);
if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
v4l2_err(sd, "no notify found!\n" );
if (std & V4L2_STD_NTSC) {
v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
bt819_setbit(decoder, 0 x01, 0 , 1 );
bt819_setbit(decoder, 0 x01, 1 , 0 );
bt819_setbit(decoder, 0 x01, 5 , 0 );
bt819_write(decoder, 0 x18, 0 x68);
bt819_write(decoder, 0 x19, 0 x5d);
/* bt819_setbit(decoder, 0x1a, 5, 1); */
timing = &timing_data[1 ];
} else if (std & V4L2_STD_PAL) {
v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
bt819_setbit(decoder, 0 x01, 0 , 1 );
bt819_setbit(decoder, 0 x01, 1 , 1 );
bt819_setbit(decoder, 0 x01, 5 , 1 );
bt819_write(decoder, 0 x18, 0 x7f);
bt819_write(decoder, 0 x19, 0 x72);
/* bt819_setbit(decoder, 0x1a, 5, 0); */
timing = &timing_data[0 ];
} else {
v4l2_dbg(1 , debug, sd, "unsupported norm %llx\n" ,
(unsigned long long )std);
return -EINVAL;
}
bt819_write(decoder, 0 x03,
(((timing->vdelay >> 8 ) & 0 x03) << 6 ) |
(((timing->vactive >> 8 ) & 0 x03) << 4 ) |
(((timing->hdelay >> 8 ) & 0 x03) << 2 ) |
((timing->hactive >> 8 ) & 0 x03));
bt819_write(decoder, 0 x04, timing->vdelay & 0 xff);
bt819_write(decoder, 0 x05, timing->vactive & 0 xff);
bt819_write(decoder, 0 x06, timing->hdelay & 0 xff);
bt819_write(decoder, 0 x07, timing->hactive & 0 xff);
bt819_write(decoder, 0 x08, (timing->hscale >> 8 ) & 0 xff);
bt819_write(decoder, 0 x09, timing->hscale & 0 xff);
decoder->norm = std;
v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
return 0 ;
}
static int bt819_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct bt819 *decoder = to_bt819(sd);
v4l2_dbg(1 , debug, sd, "set input %x\n" , input);
if (input > 7 )
return -EINVAL;
if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
v4l2_err(sd, "no notify found!\n" );
if (decoder->input != input) {
v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
decoder->input = input;
/* select mode */
if (decoder->input == 0 ) {
bt819_setbit(decoder, 0 x0b, 6 , 0 );
bt819_setbit(decoder, 0 x1a, 1 , 1 );
} else {
bt819_setbit(decoder, 0 x0b, 6 , 1 );
bt819_setbit(decoder, 0 x1a, 1 , 0 );
}
v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
}
return 0 ;
}
static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
{
struct bt819 *decoder = to_bt819(sd);
v4l2_dbg(1 , debug, sd, "enable output %x\n" , enable);
if (decoder->enable != enable) {
decoder->enable = enable;
bt819_setbit(decoder, 0 x16, 7 , !enable);
}
return 0 ;
}
static int bt819_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
struct bt819 *decoder = to_bt819(sd);
int temp;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
bt819_write(decoder, 0 x0a, ctrl->val);
break ;
case V4L2_CID_CONTRAST:
bt819_write(decoder, 0 x0c, ctrl->val & 0 xff);
bt819_setbit(decoder, 0 x0b, 2 , ((ctrl->val >> 8 ) & 0 x01));
break ;
case V4L2_CID_SATURATION:
bt819_write(decoder, 0 x0d, (ctrl->val >> 7 ) & 0 xff);
bt819_setbit(decoder, 0 x0b, 1 , ((ctrl->val >> 15 ) & 0 x01));
/* Ratio between U gain and V gain must stay the same as
the ratio between the default U and V gain values. */
temp = (ctrl->val * 180 ) / 254 ;
bt819_write(decoder, 0 x0e, (temp >> 7 ) & 0 xff);
bt819_setbit(decoder, 0 x0b, 0 , (temp >> 15 ) & 0 x01);
break ;
case V4L2_CID_HUE:
bt819_write(decoder, 0 x0f, ctrl->val);
break ;
default :
return -EINVAL;
}
return 0 ;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops bt819_ctrl_ops = {
.s_ctrl = bt819_s_ctrl,
};
static const struct v4l2_subdev_video_ops bt819_video_ops = {
.s_std = bt819_s_std,
.s_routing = bt819_s_routing,
.s_stream = bt819_s_stream,
.querystd = bt819_querystd,
.g_input_status = bt819_g_input_status,
};
static const struct v4l2_subdev_ops bt819_ops = {
.video = &bt819_video_ops,
};
/* ----------------------------------------------------------------------- */
static int bt819_probe(struct i2c_client *client)
{
int i, ver;
struct bt819 *decoder;
struct v4l2_subdev *sd;
const char *name;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
decoder = devm_kzalloc(&client->dev, sizeof (*decoder), GFP_KERNEL);
if (decoder == NULL)
return -ENOMEM;
sd = &decoder->sd;
v4l2_i2c_subdev_init(sd, client, &bt819_ops);
ver = bt819_read(decoder, 0 x17);
switch (ver & 0 xf0) {
case 0 x70:
name = "bt819a" ;
break ;
case 0 x60:
name = "bt817a" ;
break ;
case 0 x20:
name = "bt815a" ;
break ;
default :
v4l2_dbg(1 , debug, sd,
"unknown chip version 0x%02x\n" , ver);
return -ENODEV;
}
v4l_info(client, "%s found @ 0x%x (%s)\n" , name,
client->addr << 1 , client->adapter->name);
decoder->norm = V4L2_STD_NTSC;
decoder->input = 0 ;
decoder->enable = 1 ;
i = bt819_init(sd);
if (i < 0 )
v4l2_dbg(1 , debug, sd, "init status %d\n" , i);
v4l2_ctrl_handler_init(&decoder->hdl, 4 );
v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
V4L2_CID_BRIGHTNESS, -128 , 127 , 1 , 0 );
v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
V4L2_CID_CONTRAST, 0 , 511 , 1 , 0 xd8);
v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
V4L2_CID_SATURATION, 0 , 511 , 1 , 0 xfe);
v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
V4L2_CID_HUE, -128 , 127 , 1 , 0 );
sd->ctrl_handler = &decoder->hdl;
if (decoder->hdl.error) {
int err = decoder->hdl.error;
v4l2_ctrl_handler_free(&decoder->hdl);
return err;
}
v4l2_ctrl_handler_setup(&decoder->hdl);
return 0 ;
}
static void bt819_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct bt819 *decoder = to_bt819(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&decoder->hdl);
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id bt819_id[] = {
{ "bt819a" },
{ "bt817a" },
{ "bt815a" },
{ }
};
MODULE_DEVICE_TABLE(i2c, bt819_id);
static struct i2c_driver bt819_driver = {
.driver = {
.name = "bt819" ,
},
.probe = bt819_probe,
.remove = bt819_remove,
.id_table = bt819_id,
};
module_i2c_driver(bt819_driver);
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