static int bt856_attach(struct i2c_device *device)
{
struct bt856 *encoder;
/* This chip is not on the buz card but at the same address saa7185 */
//if (memcmp(device->bus->name, "buz", 3) == 0 || memcmp(device->bus->name, "zr36057", 6) == 0)
// return 1;
MOD_INC_USE_COUNT;
device->data = encoder = kmalloc(sizeof(struct bt856), GFP_KERNEL);
if (encoder == NULL) {
MOD_DEC_USE_COUNT;
return -ENOMEM;
}
memset(encoder, 0, sizeof(struct bt856));
strcpy(device->name, "bt856");
encoder->bus = device->bus;
encoder->addr = device->addr;
encoder->norm = VIDEO_MODE_NTSC;
encoder->enable = 1;
DEBUG(printk(KERN_INFO "%s-bt856: attach\n", encoder->bus->name));
bt856_write(encoder, 0xdc, 0x18);
bt856_write(encoder, 0xda, 0);
bt856_write(encoder, 0xde, 0);
bt856_setbit(encoder, 0xdc, 3, 1);
//bt856_setbit(encoder, 0xdc, 6, 0);
bt856_setbit(encoder, 0xdc, 4, 1);
switch (encoder->norm) {
case VIDEO_MODE_NTSC:
bt856_setbit(encoder, 0xdc, 2, 0);
break;
case VIDEO_MODE_PAL:
bt856_setbit(encoder, 0xdc, 2, 1);
break;
}
bt856_setbit(encoder, 0xdc, 1, 1);
bt856_setbit(encoder, 0xde, 4, 0);
bt856_setbit(encoder, 0xde, 3, 1);
return 0;
}
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 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 = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == 0)
return -ENOMEM;
memset(client, 0, sizeof(struct i2c_client));
client->addr = address;
client->adapter = adapter;
client->driver = &i2c_driver_bt856;
client->flags = I2C_CLIENT_ALLOW_USE;
strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
encoder = kmalloc(sizeof(struct bt856), GFP_KERNEL);
if (encoder == NULL) {
kfree(client);
return -ENOMEM;
}
memset(encoder, 0, sizeof(struct bt856));
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_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;
}
static int bt856_setbit(struct bt856 *dev, int subaddr, int bit, int data)
{
return bt856_write(dev, subaddr,(dev->reg[subaddr] & ~(1 << bit)) | (data ? (1 << bit) : 0));
}