424 lines
9.0 KiB
C
424 lines
9.0 KiB
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.
|
|
*
|
|
* 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 <asm/io.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/page.h>
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/videodev.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
|
|
MODULE_AUTHOR("Mike Bernson & Dave Perks");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#include <linux/i2c.h>
|
|
|
|
#define I2C_NAME(s) (s)->name
|
|
|
|
#include <linux/video_encoder.h>
|
|
|
|
static int debug = 0;
|
|
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)
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
#define REG_OFFSET 0xDA
|
|
#define BT856_NR_REG 6
|
|
|
|
struct bt856 {
|
|
unsigned char reg[BT856_NR_REG];
|
|
|
|
int norm;
|
|
int enable;
|
|
};
|
|
|
|
#define I2C_BT856 0x88
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static inline int
|
|
bt856_write (struct i2c_client *client,
|
|
u8 reg,
|
|
u8 value)
|
|
{
|
|
struct bt856 *encoder = i2c_get_clientdata(client);
|
|
|
|
encoder->reg[reg - REG_OFFSET] = value;
|
|
return i2c_smbus_write_byte_data(client, reg, value);
|
|
}
|
|
|
|
static inline int
|
|
bt856_setbit (struct i2c_client *client,
|
|
u8 reg,
|
|
u8 bit,
|
|
u8 value)
|
|
{
|
|
struct bt856 *encoder = i2c_get_clientdata(client);
|
|
|
|
return bt856_write(client, reg,
|
|
(encoder->
|
|
reg[reg - REG_OFFSET] & ~(1 << bit)) |
|
|
(value ? (1 << bit) : 0));
|
|
}
|
|
|
|
static void
|
|
bt856_dump (struct i2c_client *client)
|
|
{
|
|
int i;
|
|
struct bt856 *encoder = i2c_get_clientdata(client);
|
|
|
|
printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
|
|
for (i = 0; i < BT856_NR_REG; i += 2)
|
|
printk(" %02x", encoder->reg[i]);
|
|
printk("\n");
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static int
|
|
bt856_command (struct i2c_client *client,
|
|
unsigned int cmd,
|
|
void *arg)
|
|
{
|
|
struct bt856 *encoder = i2c_get_clientdata(client);
|
|
|
|
switch (cmd) {
|
|
|
|
case 0:
|
|
/* This is just for testing!!! */
|
|
dprintk(1, KERN_INFO "bt856: init\n");
|
|
bt856_write(client, 0xdc, 0x18);
|
|
bt856_write(client, 0xda, 0);
|
|
bt856_write(client, 0xde, 0);
|
|
|
|
bt856_setbit(client, 0xdc, 3, 1);
|
|
//bt856_setbit(client, 0xdc, 6, 0);
|
|
bt856_setbit(client, 0xdc, 4, 1);
|
|
|
|
switch (encoder->norm) {
|
|
|
|
case VIDEO_MODE_NTSC:
|
|
bt856_setbit(client, 0xdc, 2, 0);
|
|
break;
|
|
|
|
case VIDEO_MODE_PAL:
|
|
bt856_setbit(client, 0xdc, 2, 1);
|
|
break;
|
|
}
|
|
|
|
bt856_setbit(client, 0xdc, 1, 1);
|
|
bt856_setbit(client, 0xde, 4, 0);
|
|
bt856_setbit(client, 0xde, 3, 1);
|
|
if (debug != 0)
|
|
bt856_dump(client);
|
|
break;
|
|
|
|
case ENCODER_GET_CAPABILITIES:
|
|
{
|
|
struct video_encoder_capability *cap = arg;
|
|
|
|
dprintk(1, KERN_INFO "%s: get capabilities\n",
|
|
I2C_NAME(client));
|
|
|
|
cap->flags = VIDEO_ENCODER_PAL |
|
|
VIDEO_ENCODER_NTSC |
|
|
VIDEO_ENCODER_CCIR;
|
|
cap->inputs = 2;
|
|
cap->outputs = 1;
|
|
}
|
|
break;
|
|
|
|
case ENCODER_SET_NORM:
|
|
{
|
|
int *iarg = arg;
|
|
|
|
dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
|
|
*iarg);
|
|
|
|
switch (*iarg) {
|
|
|
|
case VIDEO_MODE_NTSC:
|
|
bt856_setbit(client, 0xdc, 2, 0);
|
|
break;
|
|
|
|
case VIDEO_MODE_PAL:
|
|
bt856_setbit(client, 0xdc, 2, 1);
|
|
bt856_setbit(client, 0xda, 0, 0);
|
|
//bt856_setbit(client, 0xda, 0, 1);
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
|
|
}
|
|
encoder->norm = *iarg;
|
|
if (debug != 0)
|
|
bt856_dump(client);
|
|
}
|
|
break;
|
|
|
|
case ENCODER_SET_INPUT:
|
|
{
|
|
int *iarg = arg;
|
|
|
|
dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
|
|
*iarg);
|
|
|
|
/* We only have video bus.
|
|
* iarg = 0: input is from bt819
|
|
* iarg = 1: input is from ZR36060 */
|
|
|
|
switch (*iarg) {
|
|
|
|
case 0:
|
|
bt856_setbit(client, 0xde, 4, 0);
|
|
bt856_setbit(client, 0xde, 3, 1);
|
|
bt856_setbit(client, 0xdc, 3, 1);
|
|
bt856_setbit(client, 0xdc, 6, 0);
|
|
break;
|
|
case 1:
|
|
bt856_setbit(client, 0xde, 4, 0);
|
|
bt856_setbit(client, 0xde, 3, 1);
|
|
bt856_setbit(client, 0xdc, 3, 1);
|
|
bt856_setbit(client, 0xdc, 6, 1);
|
|
break;
|
|
case 2: // Color bar
|
|
bt856_setbit(client, 0xdc, 3, 0);
|
|
bt856_setbit(client, 0xde, 4, 1);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
if (debug != 0)
|
|
bt856_dump(client);
|
|
}
|
|
break;
|
|
|
|
case ENCODER_SET_OUTPUT:
|
|
{
|
|
int *iarg = arg;
|
|
|
|
dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
|
|
*iarg);
|
|
|
|
/* not much choice of outputs */
|
|
if (*iarg != 0) {
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ENCODER_ENABLE_OUTPUT:
|
|
{
|
|
int *iarg = arg;
|
|
|
|
encoder->enable = !!*iarg;
|
|
|
|
dprintk(1, KERN_INFO "%s: enable output %d\n",
|
|
I2C_NAME(client), encoder->enable);
|
|
}
|
|
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_BT856 >> 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_bt856;
|
|
|
|
static int
|
|
bt856_detect_client (struct i2c_adapter *adapter,
|
|
int address,
|
|
int kind)
|
|
{
|
|
int i;
|
|
struct i2c_client *client;
|
|
struct bt856 *encoder;
|
|
|
|
dprintk(1,
|
|
KERN_INFO
|
|
"bt856.c: detecting bt856 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 == 0)
|
|
return -ENOMEM;
|
|
client->addr = address;
|
|
client->adapter = adapter;
|
|
client->driver = &i2c_driver_bt856;
|
|
strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
|
|
|
|
encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
|
|
if (encoder == NULL) {
|
|
kfree(client);
|
|
return -ENOMEM;
|
|
}
|
|
encoder->norm = VIDEO_MODE_NTSC;
|
|
encoder->enable = 1;
|
|
i2c_set_clientdata(client, encoder);
|
|
|
|
i = i2c_attach_client(client);
|
|
if (i) {
|
|
kfree(client);
|
|
kfree(encoder);
|
|
return i;
|
|
}
|
|
|
|
bt856_write(client, 0xdc, 0x18);
|
|
bt856_write(client, 0xda, 0);
|
|
bt856_write(client, 0xde, 0);
|
|
|
|
bt856_setbit(client, 0xdc, 3, 1);
|
|
//bt856_setbit(client, 0xdc, 6, 0);
|
|
bt856_setbit(client, 0xdc, 4, 1);
|
|
|
|
switch (encoder->norm) {
|
|
|
|
case VIDEO_MODE_NTSC:
|
|
bt856_setbit(client, 0xdc, 2, 0);
|
|
break;
|
|
|
|
case VIDEO_MODE_PAL:
|
|
bt856_setbit(client, 0xdc, 2, 1);
|
|
break;
|
|
}
|
|
|
|
bt856_setbit(client, 0xdc, 1, 1);
|
|
bt856_setbit(client, 0xde, 4, 0);
|
|
bt856_setbit(client, 0xde, 3, 1);
|
|
|
|
if (debug != 0)
|
|
bt856_dump(client);
|
|
|
|
dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
|
|
client->addr << 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bt856_attach_adapter (struct i2c_adapter *adapter)
|
|
{
|
|
dprintk(1,
|
|
KERN_INFO
|
|
"bt856.c: starting probe for adapter %s (0x%x)\n",
|
|
I2C_NAME(adapter), adapter->id);
|
|
return i2c_probe(adapter, &addr_data, &bt856_detect_client);
|
|
}
|
|
|
|
static int
|
|
bt856_detach_client (struct i2c_client *client)
|
|
{
|
|
struct bt856 *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_bt856 = {
|
|
.driver = {
|
|
.name = "bt856",
|
|
},
|
|
|
|
.id = I2C_DRIVERID_BT856,
|
|
|
|
.attach_adapter = bt856_attach_adapter,
|
|
.detach_client = bt856_detach_client,
|
|
.command = bt856_command,
|
|
};
|
|
|
|
static int __init
|
|
bt856_init (void)
|
|
{
|
|
return i2c_add_driver(&i2c_driver_bt856);
|
|
}
|
|
|
|
static void __exit
|
|
bt856_exit (void)
|
|
{
|
|
i2c_del_driver(&i2c_driver_bt856);
|
|
}
|
|
|
|
module_init(bt856_init);
|
|
module_exit(bt856_exit);
|