/*
* 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/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/signal.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/uaccess.h>
#include <linux/videodev.h>
#include <linux/video_encoder.h>
MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
MODULE_AUTHOR("Dave Perks");
MODULE_LICENSE("GPL");
#define I2C_NAME(s) (s)->name
static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define dprintk(num, format, args...) \
do { \
if (debug >= num) \
printk(format, ##args); \
} while (0)
/* ----------------------------------------------------------------------- */
struct adv7175 {
int norm;
int input;
int enable;
int bright;
int contrast;
int hue;
int sat;
};
#define I2C_ADV7175 0xd4
#define I2C_ADV7176 0x54
static char adv7175_name[] = "adv7175";
static char adv7176_name[] = "adv7176";
static char *inputs[] = { "pass_through", "play_back", "color_bar" };
static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
/* ----------------------------------------------------------------------- */
static inline int
adv7175_write (struct i2c_client *client,
u8 reg,
u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline int
adv7175_read (struct i2c_client *client,
u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int
adv7175_write_block (struct i2c_client *client,
const u8 *data,
unsigned int len)
{
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);
if ((ret = i2c_master_send(client, block_data,
block_len)) < 0)
break;
}
} else {
/* do some slow I2C emulation kind of thing */
while (len >= 2) {
reg = *data++;
if ((ret = adv7175_write(client, reg,
*data++)) < 0)
break;
len -= 2;
}
}
return ret;
}
static void
set_subcarrier_freq (struct i2c_client *client,
int pass_through)
{
/* for some reason pass_through NTSC needs
* a different sub-carrier freq to remain stable. */
if(pass_through)
adv7175_write(client, 0x02, 0x00);
else
adv7175_write(client, 0x02, 0x55);
adv7175_write(client, 0x03, 0x55);
adv7175_write(client, 0x04, 0x55);
adv7175_write(client, 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_command (struct i2c_client *client,
unsigned int cmd,
void *arg)
{
struct adv7175 *encoder = i2c_get_clientdata(client);
switch (cmd) {
case 0:
/* This is just for testing!!! */
adv7175_write_block(client, init_common,
sizeof(init_common));
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
case ENCODER_GET_CAPABILITIES:
{
struct video_encoder_capability *cap = arg;
cap->flags = VIDEO_ENCODER_PAL |
VIDEO_ENCODER_NTSC |
VIDEO_ENCODER_SECAM; /* well, hacky */
cap->inputs = 2;
cap->outputs = 1;
}
break;
case ENCODER_SET_NORM:
{
int iarg = *(int *) arg;
switch (iarg) {
case VIDEO_MODE_NTSC:
adv7175_write_block(client, init_ntsc,
sizeof(init_ntsc));
if (encoder->input == 0)
adv7175_write(client, 0x0d, 0x4f); // Enable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
case VIDEO_MODE_PAL:
adv7175_write_block(client, init_pal,
sizeof(init_pal));
if (encoder->input == 0)
adv7175_write(client, 0x0d, 0x4f); // Enable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
case VIDEO_MODE_SECAM: // WARNING! ADV7176 does not support 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(client, init_pal,
sizeof(init_pal));
if (encoder->input == 0)
adv7175_write(client, 0x0d, 0x49); // Disable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
break;
default:
dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
I2C_NAME(client), iarg);
return -EINVAL;
}
dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
norms[iarg]);
encoder->norm = iarg;
}
break;
case ENCODER_SET_INPUT:
{
int iarg = *(int *) arg;
/* RJ: *iarg = 0: input is from SAA7110
*iarg = 1: input is from ZR36060
*iarg = 2: color bar */
switch (iarg) {
case 0:
adv7175_write(client, 0x01, 0x00);
if (encoder->norm == VIDEO_MODE_NTSC)
set_subcarrier_freq(client, 1);
adv7175_write(client, 0x0c, TR1CAPT); /* TR1 */
if (encoder->norm == VIDEO_MODE_SECAM)
adv7175_write(client, 0x0d, 0x49); // Disable genlock
else
adv7175_write(client, 0x0d, 0x4f); // Enable genlock
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
//udelay(10);
break;
case 1:
adv7175_write(client, 0x01, 0x00);
if (encoder->norm == VIDEO_MODE_NTSC)
set_subcarrier_freq(client, 0);
adv7175_write(client, 0x0c, TR1PLAY); /* TR1 */
adv7175_write(client, 0x0d, 0x49);
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
//udelay(10);
break;
case 2:
adv7175_write(client, 0x01, 0x80);
if (encoder->norm == VIDEO_MODE_NTSC)
set_subcarrier_freq(client, 0);
adv7175_write(client, 0x0d, 0x49);
adv7175_write(client, 0x07, TR0MODE | TR0RST);
adv7175_write(client, 0x07, TR0MODE);
//udelay(10);
break;
default:
dprintk(1, KERN_ERR "%s: illegal input: %d\n",
I2C_NAME(client), iarg);
return -EINVAL;
}
dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
inputs[iarg]);
encoder->input = iarg;
}
break;
case ENCODER_SET_OUTPUT:
{
int *iarg = arg;
/* not much choice of outputs */
if (*iarg != 0) {
return -EINVAL;
}
}
break;
case ENCODER_ENABLE_OUTPUT:
{
int *iarg = arg;
encoder->enable = !!*iarg;
}
break;
default:
return -EINVAL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
/*
* Generic i2c probe
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
static unsigned short normal_i2c[] =
{ I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
I2C_CLIENT_END
};
static unsigned short ignore = I2C_CLIENT_END;
static struct i2c_client_address_data addr_data = {
.normal_i2c = normal_i2c,
.probe = &ignore,
.ignore = &ignore,
};
static struct i2c_driver i2c_driver_adv7175;
static int
adv7175_detect_client (struct i2c_adapter *adapter,
int address,
int kind)
{
int i;
struct i2c_client *client;
struct adv7175 *encoder;
char *dname;
dprintk(1,
KERN_INFO
"adv7175.c: detecting adv7175 client on address 0x%x\n",
address << 1);
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return 0;
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (!client)
return -ENOMEM;
client->addr = address;
client->adapter = adapter;
client->driver = &i2c_driver_adv7175;
if ((client->addr == I2C_ADV7175 >> 1) ||
(client->addr == (I2C_ADV7175 >> 1) + 1)) {
dname = adv7175_name;
} else if ((client->addr == I2C_ADV7176 >> 1) ||
(client->addr == (I2C_ADV7176 >> 1) + 1)) {
dname = adv7176_name;
} else {
/* We should never get here!!! */
kfree(client);
return 0;
}
strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
if (encoder == NULL) {
kfree(client);
return -ENOMEM;
}
encoder->norm = VIDEO_MODE_PAL;
encoder->input = 0;
encoder->enable = 1;
i2c_set_clientdata(client, encoder);
i = i2c_attach_client(client);
if (i) {
kfree(client);
kfree(encoder);
return i;
}
i = adv7175_write_block(client, init_common, sizeof(init_common));
if (i >= 0) {
i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
i = adv7175_write(client, 0x07, TR0MODE);
i = adv7175_read(client, 0x12);
dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
I2C_NAME(client), i & 1, client->addr << 1);
}
if (i < 0) {
dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
I2C_NAME(client), i);
}
return 0;
}
static int
adv7175_attach_adapter (struct i2c_adapter *adapter)
{
dprintk(1,
KERN_INFO
"adv7175.c: starting probe for adapter %s (0x%x)\n",
I2C_NAME(adapter), adapter->id);
return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
}
static int
adv7175_detach_client (struct i2c_client *client)
{
struct adv7175 *encoder = i2c_get_clientdata(client);
int err;
err = i2c_detach_client(client);
if (err) {
return err;
}
kfree(encoder);
kfree(client);
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver i2c_driver_adv7175 = {
.driver = {
.name = "adv7175", /* name */
},
.id = I2C_DRIVERID_ADV7175,
.attach_adapter = adv7175_attach_adapter,
.detach_client = adv7175_detach_client,
.command = adv7175_command,
};
static int __init
adv7175_init (void)
{
return i2c_add_driver(&i2c_driver_adv7175);
}
static void __exit
adv7175_exit (void)
{
i2c_del_driver(&i2c_driver_adv7175);
}
module_init(adv7175_init);
module_exit(adv7175_exit);
