// SPDX-License-Identifier: GPL-2.0-or-later
/*
* saa7185 - Philips SAA7185B video encoder driver version 0.0.3
*
* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
*
* Slight changes for video timing and attachment output by
* Wolfgang Scherr <scherr@net4you.net>
*
* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
* - moved over to linux>=2.4.x i2c protocol (1/1/2003)
*/
#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("Philips SAA7185 video encoder driver" );
MODULE_AUTHOR("Dave Perks" );
MODULE_LICENSE("GPL" );
static int debug;
module_param(debug, int , 0 );
MODULE_PARM_DESC(debug, "Debug level (0-1)" );
/* ----------------------------------------------------------------------- */
struct saa7185 {
struct v4l2_subdev sd;
unsigned char reg[128 ];
v4l2_std_id norm;
};
static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
{
return container_of(sd, struct saa7185, sd);
}
/* ----------------------------------------------------------------------- */
static inline int saa7185_read(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte(client);
}
static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct saa7185 *encoder = to_saa7185(sd);
v4l2_dbg(1 , debug, sd, "%02x set to %02x\n" , reg, value);
encoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static int saa7185_write_block(struct v4l2_subdev *sd,
const u8 *data, unsigned int len)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct saa7185 *encoder = to_saa7185(sd);
int ret = -1 ;
u8 reg;
/* the adv7175 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++] =
encoder->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 = saa7185_write(sd, reg, *data++);
if (ret < 0 )
break ;
len -= 2 ;
}
}
return ret;
}
/* ----------------------------------------------------------------------- */
static const unsigned char init_common[] = {
0 x3a, 0 x0f, /* CBENB=0, V656=0, VY2C=1,
* YUV2C=1, MY2C=1, MUV2C=1 */
0 x42, 0 x6b, /* OVLY0=107 */
0 x43, 0 x00, /* OVLU0=0 white */
0 x44, 0 x00, /* OVLV0=0 */
0 x45, 0 x22, /* OVLY1=34 */
0 x46, 0 xac, /* OVLU1=172 yellow */
0 x47, 0 x0e, /* OVLV1=14 */
0 x48, 0 x03, /* OVLY2=3 */
0 x49, 0 x1d, /* OVLU2=29 cyan */
0 x4a, 0 xac, /* OVLV2=172 */
0 x4b, 0 xf0, /* OVLY3=240 */
0 x4c, 0 xc8, /* OVLU3=200 green */
0 x4d, 0 xb9, /* OVLV3=185 */
0 x4e, 0 xd4, /* OVLY4=212 */
0 x4f, 0 x38, /* OVLU4=56 magenta */
0 x50, 0 x47, /* OVLV4=71 */
0 x51, 0 xc1, /* OVLY5=193 */
0 x52, 0 xe3, /* OVLU5=227 red */
0 x53, 0 x54, /* OVLV5=84 */
0 x54, 0 xa3, /* OVLY6=163 */
0 x55, 0 x54, /* OVLU6=84 blue */
0 x56, 0 xf2, /* OVLV6=242 */
0 x57, 0 x90, /* OVLY7=144 */
0 x58, 0 x00, /* OVLU7=0 black */
0 x59, 0 x00, /* OVLV7=0 */
0 x5a, 0 x00, /* CHPS=0 */
0 x5b, 0 x76, /* GAINU=118 */
0 x5c, 0 xa5, /* GAINV=165 */
0 x5d, 0 x3c, /* BLCKL=60 */
0 x5e, 0 x3a, /* BLNNL=58 */
0 x5f, 0 x3a, /* CCRS=0, BLNVB=58 */
0 x60, 0 x00, /* NULL */
/* 0x61 - 0x66 set according to norm */
0 x67, 0 x00, /* 0 : caption 1st byte odd field */
0 x68, 0 x00, /* 0 : caption 2nd byte odd field */
0 x69, 0 x00, /* 0 : caption 1st byte even field */
0 x6a, 0 x00, /* 0 : caption 2nd byte even field */
0 x6b, 0 x91, /* MODIN=2, PCREF=0, SCCLN=17 */
0 x6c, 0 x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
* CBLF=0, ORCV2=0, PRCV2=0 */
0 x6d, 0 x00, /* SRCM1=0, CCEN=0 */
0 x6e, 0 x0e, /* HTRIG=0x005, approx. centered, at
* least for PAL */
0 x6f, 0 x00, /* HTRIG upper bits */
0 x70, 0 x20, /* PHRES=0, SBLN=1, VTRIG=0 */
/* The following should not be needed */
0 x71, 0 x15, /* BMRQ=0x115 */
0 x72, 0 x90, /* EMRQ=0x690 */
0 x73, 0 x61, /* EMRQ=0x690, BMRQ=0x115 */
0 x74, 0 x00, /* NULL */
0 x75, 0 x00, /* NULL */
0 x76, 0 x00, /* NULL */
0 x77, 0 x15, /* BRCV=0x115 */
0 x78, 0 x90, /* ERCV=0x690 */
0 x79, 0 x61, /* ERCV=0x690, BRCV=0x115 */
/* Field length controls */
0 x7a, 0 x70, /* FLC=0 */
/* The following should not be needed if SBLN = 1 */
0 x7b, 0 x16, /* FAL=22 */
0 x7c, 0 x35, /* LAL=244 */
0 x7d, 0 x20, /* LAL=244, FAL=22 */
};
static const unsigned char init_pal[] = {
0 x61, 0 x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
* YGS=1, INPI=0, DOWN=0 */
0 x62, 0 xc8, /* DECTYP=1, BSTA=72 */
0 x63, 0 xcb, /* FSC0 */
0 x64, 0 x8a, /* FSC1 */
0 x65, 0 x09, /* FSC2 */
0 x66, 0 x2a, /* FSC3 */
};
static const unsigned char init_ntsc[] = {
0 x61, 0 x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
* YGS=1, INPI=0, DOWN=0 */
0 x62, 0 xe6, /* DECTYP=1, BSTA=102 */
0 x63, 0 x1f, /* FSC0 */
0 x64, 0 x7c, /* FSC1 */
0 x65, 0 xf0, /* FSC2 */
0 x66, 0 x21, /* FSC3 */
};
static int saa7185_init(struct v4l2_subdev *sd, u32 val)
{
struct saa7185 *encoder = to_saa7185(sd);
saa7185_write_block(sd, init_common, sizeof (init_common));
if (encoder->norm & V4L2_STD_NTSC)
saa7185_write_block(sd, init_ntsc, sizeof (init_ntsc));
else
saa7185_write_block(sd, init_pal, sizeof (init_pal));
return 0 ;
}
static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct saa7185 *encoder = to_saa7185(sd);
if (std & V4L2_STD_NTSC)
saa7185_write_block(sd, init_ntsc, sizeof (init_ntsc));
else if (std & V4L2_STD_PAL)
saa7185_write_block(sd, init_pal, sizeof (init_pal));
else
return -EINVAL;
encoder->norm = std;
return 0 ;
}
static int saa7185_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct saa7185 *encoder = to_saa7185(sd);
/* RJ: input = 0: input is from SA7111
input = 1: input is from ZR36060 */
switch (input) {
case 0 :
/* turn off colorbar */
saa7185_write(sd, 0 x3a, 0 x0f);
/* Switch RTCE to 1 */
saa7185_write(sd, 0 x61, (encoder->reg[0 x61] & 0 xf7) | 0 x08);
saa7185_write(sd, 0 x6e, 0 x01);
break ;
case 1 :
/* turn off colorbar */
saa7185_write(sd, 0 x3a, 0 x0f);
/* Switch RTCE to 0 */
saa7185_write(sd, 0 x61, (encoder->reg[0 x61] & 0 xf7) | 0 x00);
/* SW: a slight sync problem... */
saa7185_write(sd, 0 x6e, 0 x00);
break ;
case 2 :
/* turn on colorbar */
saa7185_write(sd, 0 x3a, 0 x8f);
/* Switch RTCE to 0 */
saa7185_write(sd, 0 x61, (encoder->reg[0 x61] & 0 xf7) | 0 x08);
/* SW: a slight sync problem... */
saa7185_write(sd, 0 x6e, 0 x01);
break ;
default :
return -EINVAL;
}
return 0 ;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops saa7185_core_ops = {
.init = saa7185_init,
};
static const struct v4l2_subdev_video_ops saa7185_video_ops = {
.s_std_output = saa7185_s_std_output,
.s_routing = saa7185_s_routing,
};
static const struct v4l2_subdev_ops saa7185_ops = {
.core = &saa7185_core_ops,
.video = &saa7185_video_ops,
};
/* ----------------------------------------------------------------------- */
static int saa7185_probe(struct i2c_client *client)
{
int i;
struct saa7185 *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;
encoder->norm = V4L2_STD_NTSC;
sd = &encoder->sd;
v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
i = saa7185_write_block(sd, init_common, sizeof (init_common));
if (i >= 0 )
i = saa7185_write_block(sd, init_ntsc, sizeof (init_ntsc));
if (i < 0 )
v4l2_dbg(1 , debug, sd, "init error %d\n" , i);
else
v4l2_dbg(1 , debug, sd, "revision 0x%x\n" ,
saa7185_read(sd) >> 5 );
return 0 ;
}
static void saa7185_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct saa7185 *encoder = to_saa7185(sd);
v4l2_device_unregister_subdev(sd);
/* SW: output off is active */
saa7185_write(sd, 0 x61, (encoder->reg[0 x61]) | 0 x40);
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id saa7185_id[] = {
{ "saa7185" },
{ }
};
MODULE_DEVICE_TABLE(i2c, saa7185_id);
static struct i2c_driver saa7185_driver = {
.driver = {
.name = "saa7185" ,
},
.probe = saa7185_probe,
.remove = saa7185_remove,
.id_table = saa7185_id,
};
module_i2c_driver(saa7185_driver);
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