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alistair23-linux/drivers/media/video/adv7175.c
Christian Gmeiner f1a84c9b0a [media] adv7175: Make use of media bus pixel codes 
The ADV7175A/ADV7176A can operate in either 8-bit or 16-bit YCrCb mode.

* 8-Bit YCrCb Mode
This default mode accepts multiplexed YCrCb inputs through
the P7-P0 pixel inputs. The inputs follow the sequence Cb0, Y0
Cr0, Y1 Cb1, Y2, etc. The Y, Cb and Cr data are input on a
rising clock edge.

* 16-Bit YCrCb Mode
This mode accepts Y inputs through the P7–P0 pixel inputs and
multiplexed CrCb inputs through the P15–P8 pixel inputs. The
data is loaded on every second rising edge of CLOCK. The inputs
follow the sequence Cb0, Y0 Cr0, Y1 Cb1, Y2, etc.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-10-19 07:59:05 -02:00

472 lines
12 KiB
C
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/*
* adv7175 - adv7175a video encoder driver version 0.0.3
*
* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
* Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
* - some corrections for Pinnacle Systems Inc. DC10plus card.
*
* 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/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
MODULE_AUTHOR("Dave Perks");
MODULE_LICENSE("GPL");
#define I2C_ADV7175 0xd4
#define I2C_ADV7176 0x54
static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
/* ----------------------------------------------------------------------- */
struct adv7175 {
struct v4l2_subdev sd;
v4l2_std_id norm;
int input;
};
static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
{
return container_of(sd, struct adv7175, sd);
}
static char *inputs[] = { "pass_through", "play_back", "color_bar" };
static enum v4l2_mbus_pixelcode adv7175_codes[] = {
V4L2_MBUS_FMT_UYVY8_2X8,
V4L2_MBUS_FMT_UYVY8_1X16,
};
/* ----------------------------------------------------------------------- */
static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte_data(client, reg);
}
static int adv7175_write_block(struct v4l2_subdev *sd,
const u8 *data, unsigned int len)
{
struct i2c_client *client = v4l2_get_subdevdata(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++] = data[1];
reg++;
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 = adv7175_write(sd, reg, *data++);
if (ret < 0)
break;
len -= 2;
}
}
return ret;
}
static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
{
/* for some reason pass_through NTSC needs
* a different sub-carrier freq to remain stable. */
if (pass_through)
adv7175_write(sd, 0x02, 0x00);
else
adv7175_write(sd, 0x02, 0x55);
adv7175_write(sd, 0x03, 0x55);
adv7175_write(sd, 0x04, 0x55);
adv7175_write(sd, 0x05, 0x25);
}
/* ----------------------------------------------------------------------- */
/* Output filter: S-Video Composite */
#define MR050 0x11 /* 0x09 */
#define MR060 0x14 /* 0x0c */
/* ----------------------------------------------------------------------- */
#define TR0MODE 0x46
#define TR0RST 0x80
#define TR1CAPT 0x80
#define TR1PLAY 0x00
static const unsigned char init_common[] = {
0x00, MR050, /* MR0, PAL enabled */
0x01, 0x00, /* MR1 */
0x02, 0x0c, /* subc. freq. */
0x03, 0x8c, /* subc. freq. */
0x04, 0x79, /* subc. freq. */
0x05, 0x26, /* subc. freq. */
0x06, 0x40, /* subc. phase */
0x07, TR0MODE, /* TR0, 16bit */
0x08, 0x21, /* */
0x09, 0x00, /* */
0x0a, 0x00, /* */
0x0b, 0x00, /* */
0x0c, TR1CAPT, /* TR1 */
0x0d, 0x4f, /* MR2 */
0x0e, 0x00, /* */
0x0f, 0x00, /* */
0x10, 0x00, /* */
0x11, 0x00, /* */
};
static const unsigned char init_pal[] = {
0x00, MR050, /* MR0, PAL enabled */
0x01, 0x00, /* MR1 */
0x02, 0x0c, /* subc. freq. */
0x03, 0x8c, /* subc. freq. */
0x04, 0x79, /* subc. freq. */
0x05, 0x26, /* subc. freq. */
0x06, 0x40, /* subc. phase */
};
static const unsigned char init_ntsc[] = {
0x00, MR060, /* MR0, NTSC enabled */
0x01, 0x00, /* MR1 */
0x02, 0x55, /* subc. freq. */
0x03, 0x55, /* subc. freq. */
0x04, 0x55, /* subc. freq. */
0x05, 0x25, /* subc. freq. */
0x06, 0x1a, /* subc. phase */
};
static int adv7175_init(struct v4l2_subdev *sd, u32 val)
{
/* This is just for testing!!! */
adv7175_write_block(sd, init_common, sizeof(init_common));
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
return 0;
}
static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct adv7175 *encoder = to_adv7175(sd);
if (std & V4L2_STD_NTSC) {
adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
if (encoder->input == 0)
adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
} else if (std & V4L2_STD_PAL) {
adv7175_write_block(sd, init_pal, sizeof(init_pal));
if (encoder->input == 0)
adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
} else if (std & V4L2_STD_SECAM) {
/* This is an attempt to convert
* SECAM->PAL (typically it does not work
* due to genlock: when decoder is in SECAM
* and encoder in in PAL the subcarrier can
* not be syncronized with horizontal
* quency) */
adv7175_write_block(sd, init_pal, sizeof(init_pal));
if (encoder->input == 0)
adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
} else {
v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
(unsigned long long)std);
return -EINVAL;
}
v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
encoder->norm = std;
return 0;
}
static int adv7175_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct adv7175 *encoder = to_adv7175(sd);
/* RJ: input = 0: input is from decoder
input = 1: input is from ZR36060
input = 2: color bar */
switch (input) {
case 0:
adv7175_write(sd, 0x01, 0x00);
if (encoder->norm & V4L2_STD_NTSC)
set_subcarrier_freq(sd, 1);
adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
if (encoder->norm & V4L2_STD_SECAM)
adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
else
adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
/*udelay(10);*/
break;
case 1:
adv7175_write(sd, 0x01, 0x00);
if (encoder->norm & V4L2_STD_NTSC)
set_subcarrier_freq(sd, 0);
adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
adv7175_write(sd, 0x0d, 0x49);
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
/* udelay(10); */
break;
case 2:
adv7175_write(sd, 0x01, 0x80);
if (encoder->norm & V4L2_STD_NTSC)
set_subcarrier_freq(sd, 0);
adv7175_write(sd, 0x0d, 0x49);
adv7175_write(sd, 0x07, TR0MODE | TR0RST);
adv7175_write(sd, 0x07, TR0MODE);
/* udelay(10); */
break;
default:
v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
return -EINVAL;
}
v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
encoder->input = input;
return 0;
}
static int adv7175_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
enum v4l2_mbus_pixelcode *code)
{
if (index >= ARRAY_SIZE(adv7175_codes))
return -EINVAL;
*code = adv7175_codes[index];
return 0;
}
static int adv7175_g_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
u8 val = adv7175_read(sd, 0x7);
if ((val & 0x40) == (1 << 6))
mf->code = V4L2_MBUS_FMT_UYVY8_1X16;
else
mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
mf->width = 0;
mf->height = 0;
mf->field = V4L2_FIELD_ANY;
return 0;
}
static int adv7175_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
u8 val = adv7175_read(sd, 0x7);
int ret;
switch (mf->code) {
case V4L2_MBUS_FMT_UYVY8_2X8:
val &= ~0x40;
break;
case V4L2_MBUS_FMT_UYVY8_1X16:
val |= 0x40;
break;
default:
v4l2_dbg(1, debug, sd,
"illegal v4l2_mbus_framefmt code: %d\n", mf->code);
return -EINVAL;
}
ret = adv7175_write(sd, 0x7, val);
return ret;
}
static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
}
static int adv7175_s_power(struct v4l2_subdev *sd, int on)
{
if (on)
adv7175_write(sd, 0x01, 0x00);
else
adv7175_write(sd, 0x01, 0x78);
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops adv7175_core_ops = {
.g_chip_ident = adv7175_g_chip_ident,
.init = adv7175_init,
.s_power = adv7175_s_power,
};
static const struct v4l2_subdev_video_ops adv7175_video_ops = {
.s_std_output = adv7175_s_std_output,
.s_routing = adv7175_s_routing,
.s_mbus_fmt = adv7175_s_fmt,
.g_mbus_fmt = adv7175_g_fmt,
.enum_mbus_fmt = adv7175_enum_fmt,
};
static const struct v4l2_subdev_ops adv7175_ops = {
.core = &adv7175_core_ops,
.video = &adv7175_video_ops,
};
/* ----------------------------------------------------------------------- */
static int adv7175_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int i;
struct adv7175 *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 = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
if (encoder == NULL)
return -ENOMEM;
sd = &encoder->sd;
v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
encoder->norm = V4L2_STD_NTSC;
encoder->input = 0;
i = adv7175_write_block(sd, init_common, sizeof(init_common));
if (i >= 0) {
i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
i = adv7175_write(sd, 0x07, TR0MODE);
i = adv7175_read(sd, 0x12);
v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
}
if (i < 0)
v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
return 0;
}
static int adv7175_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
kfree(to_adv7175(sd));
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id adv7175_id[] = {
{ "adv7175", 0 },
{ "adv7176", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adv7175_id);
static struct i2c_driver adv7175_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "adv7175",
},
.probe = adv7175_probe,
.remove = adv7175_remove,
.id_table = adv7175_id,
};
static __init int init_adv7175(void)
{
return i2c_add_driver(&adv7175_driver);
}
static __exit void exit_adv7175(void)
{
i2c_del_driver(&adv7175_driver);
}
module_init(init_adv7175);
module_exit(exit_adv7175);
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