saa7114.c

h内核

static struct i2c_client_address_data addr_data = {
	.normal_i2c		= normal_i2c,
	.normal_i2c_range	= normal_i2c_range,
	.probe			= probe,
	.probe_range		= probe_range,
	.ignore			= ignore,
	.ignore_range		= ignore_range,
	.force			= force
};

static int saa7114_i2c_id = 0;
static struct i2c_driver i2c_driver_saa7114;

static int
saa7114_detect_client (struct i2c_adapter *adapter,
		       int                 address,
		       int                 kind)
{
	int i, err[30];
	short int hoff = SAA_7114_NTSC_HOFFSET;
	short int voff = SAA_7114_NTSC_VOFFSET;
	short int w = SAA_7114_NTSC_WIDTH;
	short int h = SAA_7114_NTSC_HEIGHT;
	struct i2c_client *client;
	struct saa7114 *decoder;

	dprintk(1,
		KERN_INFO
		"saa7114.c: detecting saa7114 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_saa7114;
	client->flags = I2C_CLIENT_ALLOW_USE;
	client->id = saa7114_i2c_id++;
	snprintf(I2C_NAME(client), sizeof(I2C_NAME(client)) - 1,
		"saa7114[%d]", client->id);

	decoder = kmalloc(sizeof(struct saa7114), GFP_KERNEL);
	if (decoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	memset(decoder, 0, sizeof(struct saa7114));
	decoder->norm = VIDEO_MODE_NTSC;
	decoder->input = -1;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	decoder->playback = 0;	// initially capture mode useda
	i2c_set_clientdata(client, decoder);

	memcpy(decoder->reg, init, sizeof(init));

	decoder->reg[REG_ADDR(0x94)] = LOBYTE(hoff);	// hoffset low
	decoder->reg[REG_ADDR(0x95)] = HIBYTE(hoff) & 0x0f;	// hoffset high
	decoder->reg[REG_ADDR(0x96)] = LOBYTE(w);	// width low
	decoder->reg[REG_ADDR(0x97)] = HIBYTE(w) & 0x0f;	// width high
	decoder->reg[REG_ADDR(0x98)] = LOBYTE(voff);	// voffset low
	decoder->reg[REG_ADDR(0x99)] = HIBYTE(voff) & 0x0f;	// voffset high
	decoder->reg[REG_ADDR(0x9a)] = LOBYTE(h + 2);	// height low
	decoder->reg[REG_ADDR(0x9b)] = HIBYTE(h + 2) & 0x0f;	// height high
	decoder->reg[REG_ADDR(0x9c)] = LOBYTE(w);	// out width low
	decoder->reg[REG_ADDR(0x9d)] = HIBYTE(w) & 0x0f;	// out width high
	decoder->reg[REG_ADDR(0x9e)] = LOBYTE(h);	// out height low
	decoder->reg[REG_ADDR(0x9f)] = HIBYTE(h) & 0x0f;	// out height high

	decoder->reg[REG_ADDR(0xc4)] = LOBYTE(hoff);	// hoffset low
	decoder->reg[REG_ADDR(0xc5)] = HIBYTE(hoff) & 0x0f;	// hoffset high
	decoder->reg[REG_ADDR(0xc6)] = LOBYTE(w);	// width low
	decoder->reg[REG_ADDR(0xc7)] = HIBYTE(w) & 0x0f;	// width high
	decoder->reg[REG_ADDR(0xc8)] = LOBYTE(voff);	// voffset low
	decoder->reg[REG_ADDR(0xc9)] = HIBYTE(voff) & 0x0f;	// voffset high
	decoder->reg[REG_ADDR(0xca)] = LOBYTE(h + 2);	// height low
	decoder->reg[REG_ADDR(0xcb)] = HIBYTE(h + 2) & 0x0f;	// height high
	decoder->reg[REG_ADDR(0xcc)] = LOBYTE(w);	// out width low
	decoder->reg[REG_ADDR(0xcd)] = HIBYTE(w) & 0x0f;	// out width high
	decoder->reg[REG_ADDR(0xce)] = LOBYTE(h);	// out height low
	decoder->reg[REG_ADDR(0xcf)] = HIBYTE(h) & 0x0f;	// out height high

	decoder->reg[REG_ADDR(0xb8)] =
	    LOBYTE(LOWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));
	decoder->reg[REG_ADDR(0xb9)] =
	    HIBYTE(LOWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));
	decoder->reg[REG_ADDR(0xba)] =
	    LOBYTE(HIWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));
	decoder->reg[REG_ADDR(0xbb)] =
	    HIBYTE(HIWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));

	decoder->reg[REG_ADDR(0xbc)] =
	    LOBYTE(LOWORD(SAA_7114_VERTICAL_LUMA_OFFSET));
	decoder->reg[REG_ADDR(0xbd)] =
	    HIBYTE(LOWORD(SAA_7114_VERTICAL_LUMA_OFFSET));
	decoder->reg[REG_ADDR(0xbe)] =
	    LOBYTE(HIWORD(SAA_7114_VERTICAL_LUMA_OFFSET));
	decoder->reg[REG_ADDR(0xbf)] =
	    HIBYTE(HIWORD(SAA_7114_VERTICAL_LUMA_OFFSET));

	decoder->reg[REG_ADDR(0xe8)] =
	    LOBYTE(LOWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));
	decoder->reg[REG_ADDR(0xe9)] =
	    HIBYTE(LOWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));
	decoder->reg[REG_ADDR(0xea)] =
	    LOBYTE(HIWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));
	decoder->reg[REG_ADDR(0xeb)] =
	    HIBYTE(HIWORD(SAA_7114_VERTICAL_CHROMA_OFFSET));

	decoder->reg[REG_ADDR(0xec)] =
	    LOBYTE(LOWORD(SAA_7114_VERTICAL_LUMA_OFFSET));
	decoder->reg[REG_ADDR(0xed)] =
	    HIBYTE(LOWORD(SAA_7114_VERTICAL_LUMA_OFFSET));
	decoder->reg[REG_ADDR(0xee)] =
	    LOBYTE(HIWORD(SAA_7114_VERTICAL_LUMA_OFFSET));
	decoder->reg[REG_ADDR(0xef)] =
	    HIBYTE(HIWORD(SAA_7114_VERTICAL_LUMA_OFFSET));


	decoder->reg[REG_ADDR(0x13)] = 0x80;	// RTC0 on
	decoder->reg[REG_ADDR(0x87)] = 0x01;	// I-Port
	decoder->reg[REG_ADDR(0x12)] = 0xc9;	// RTS0

	decoder->reg[REG_ADDR(0x02)] = 0xc0;	// set composite1 input, aveasy
	decoder->reg[REG_ADDR(0x09)] = 0x00;	// chrominance trap
	decoder->reg[REG_ADDR(0x0e)] |= 1;	// combfilter on


	dprintk(1, KERN_DEBUG "%s_attach: starting decoder init\n",
		I2C_NAME(client));

	err[0] =
	    saa7114_write_block(client, decoder->reg + (0x20 << 1),
				0x10 << 1);
	err[1] =
	    saa7114_write_block(client, decoder->reg + (0x30 << 1),
				0x10 << 1);
	err[2] =
	    saa7114_write_block(client, decoder->reg + (0x63 << 1),
				(0x7f + 1 - 0x63) << 1);
	err[3] =
	    saa7114_write_block(client, decoder->reg + (0x89 << 1),
				6 << 1);
	err[4] =
	    saa7114_write_block(client, decoder->reg + (0xb8 << 1),
				8 << 1);
	err[5] =
	    saa7114_write_block(client, decoder->reg + (0xe8 << 1),
				8 << 1);


	for (i = 0; i <= 5; i++) {
		if (err[i] < 0) {
			dprintk(1,
				KERN_ERR
				"%s_attach: init error %d at stage %d, leaving attach.\n",
				I2C_NAME(client), i, err[i]);
			kfree(decoder);
			kfree(client);
			return 0;
		}
	}

	for (i = 6; i < 8; i++) {
		dprintk(1,
			KERN_DEBUG
			"%s_attach: reg[0x%02x] = 0x%02x (0x%02x)\n",
			I2C_NAME(client), i, saa7114_read(client, i),
			decoder->reg[REG_ADDR(i)]);
	}

	dprintk(1,
		KERN_DEBUG
		"%s_attach: performing decoder reset sequence\n",
		I2C_NAME(client));

	err[6] = saa7114_write(client, 0x80, 0x06);	// i-port and scaler backend clock selection, task A&B off
	err[7] = saa7114_write(client, 0x88, 0xd8);	// sw reset scaler
	err[8] = saa7114_write(client, 0x88, 0xf8);	// sw reset scaler release

	for (i = 6; i <= 8; i++) {
		if (err[i] < 0) {
			dprintk(1,
				KERN_ERR
				"%s_attach: init error %d at stage %d, leaving attach.\n",
				I2C_NAME(client), i, err[i]);
			kfree(decoder);
			kfree(client);
			return 0;
		}
	}

	dprintk(1, KERN_INFO "%s_attach: performing the rest of init\n",
		I2C_NAME(client));


	err[9] = saa7114_write(client, 0x01, decoder->reg[REG_ADDR(0x01)]);
	err[10] = saa7114_write_block(client, decoder->reg + (0x03 << 1), (0x1e + 1 - 0x03) << 1);	// big seq
	err[11] = saa7114_write_block(client, decoder->reg + (0x40 << 1), (0x5f + 1 - 0x40) << 1);	// slicer
	err[12] = saa7114_write_block(client, decoder->reg + (0x81 << 1), 2 << 1);	// ?
	err[13] = saa7114_write_block(client, decoder->reg + (0x83 << 1), 5 << 1);	// ?
	err[14] = saa7114_write_block(client, decoder->reg + (0x90 << 1), 4 << 1);	// Task A
	err[15] =
	    saa7114_write_block(client, decoder->reg + (0x94 << 1),
				12 << 1);
	err[16] =
	    saa7114_write_block(client, decoder->reg + (0xa0 << 1),
				8 << 1);
	err[17] =
	    saa7114_write_block(client, decoder->reg + (0xa8 << 1),
				8 << 1);
	err[18] =
	    saa7114_write_block(client, decoder->reg + (0xb0 << 1),
				8 << 1);
	err[19] = saa7114_write_block(client, decoder->reg + (0xc0 << 1), 4 << 1);	// Task B
	err[15] =
	    saa7114_write_block(client, decoder->reg + (0xc4 << 1),
				12 << 1);
	err[16] =
	    saa7114_write_block(client, decoder->reg + (0xd0 << 1),
				8 << 1);
	err[17] =
	    saa7114_write_block(client, decoder->reg + (0xd8 << 1),
				8 << 1);
	err[18] =
	    saa7114_write_block(client, decoder->reg + (0xe0 << 1),
				8 << 1);

	for (i = 9; i <= 18; i++) {
		if (err[i] < 0) {
			dprintk(1,
				KERN_ERR
				"%s_attach: init error %d at stage %d, leaving attach.\n",
				I2C_NAME(client), i, err[i]);
			kfree(decoder);
			kfree(client);
			return 0;
		}
	}


	for (i = 6; i < 8; i++) {
		dprintk(1,
			KERN_DEBUG
			"%s_attach: reg[0x%02x] = 0x%02x (0x%02x)\n",
			I2C_NAME(client), i, saa7114_read(client, i),
			decoder->reg[REG_ADDR(i)]);
	}


	for (i = 0x11; i <= 0x13; i++) {
		dprintk(1,
			KERN_DEBUG
			"%s_attach: reg[0x%02x] = 0x%02x (0x%02x)\n",
			I2C_NAME(client), i, saa7114_read(client, i),
			decoder->reg[REG_ADDR(i)]);
	}


	dprintk(1, KERN_DEBUG "%s_attach: setting video input\n",
		I2C_NAME(client));

	err[19] =
	    saa7114_write(client, 0x02, decoder->reg[REG_ADDR(0x02)]);
	err[20] =
	    saa7114_write(client, 0x09, decoder->reg[REG_ADDR(0x09)]);
	err[21] =
	    saa7114_write(client, 0x0e, decoder->reg[REG_ADDR(0x0e)]);

	for (i = 19; i <= 21; i++) {
		if (err[i] < 0) {
			dprintk(1,
				KERN_ERR
				"%s_attach: init error %d at stage %d, leaving attach.\n",
				I2C_NAME(client), i, err[i]);
			kfree(decoder);
			kfree(client);
			return 0;
		}
	}

	dprintk(1,
		KERN_DEBUG
		"%s_attach: performing decoder reset sequence\n",
		I2C_NAME(client));

	err[22] = saa7114_write(client, 0x88, 0xd8);	// sw reset scaler
	err[23] = saa7114_write(client, 0x88, 0xf8);	// sw reset scaler release
	err[24] = saa7114_write(client, 0x80, 0x36);	// i-port and scaler backend clock selection, task A&B off


	for (i = 22; i <= 24; i++) {
		if (err[i] < 0) {
			dprintk(1,
				KERN_ERR
				"%s_attach: init error %d at stage %d, leaving attach.\n",
				I2C_NAME(client), i, err[i]);
			kfree(decoder);
			kfree(client);
			return 0;
		}
	}

	err[25] = saa7114_write(client, 0x06, init[REG_ADDR(0x06)]);
	err[26] = saa7114_write(client, 0x07, init[REG_ADDR(0x07)]);
	err[27] = saa7114_write(client, 0x10, init[REG_ADDR(0x10)]);

	dprintk(1,
		KERN_INFO
		"%s_attach: chip version %x, decoder status 0x%02x\n",
		I2C_NAME(client), saa7114_read(client, 0x00) >> 4,
		saa7114_read(client, 0x1f));
	dprintk(1,
		KERN_DEBUG
		"%s_attach: power save control: 0x%02x, scaler status: 0x%02x\n",
		I2C_NAME(client), saa7114_read(client, 0x88),
		saa7114_read(client, 0x8f));


	for (i = 0x94; i < 0x96; i++) {
		dprintk(1,
			KERN_DEBUG
			"%s_attach: reg[0x%02x] = 0x%02x (0x%02x)\n",
			I2C_NAME(client), i, saa7114_read(client, i),
			decoder->reg[REG_ADDR(i)]);
	}

	i = i2c_attach_client(client);
	if (i) {
		kfree(client);
		kfree(decoder);
		return i;
	}

	//i = saa7114_write_block(client, init, sizeof(init));
	i = 0;
	if (i < 0) {
		dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
			I2C_NAME(client), i);
	} else {
		dprintk(1,
			KERN_INFO
			"%s_attach: chip version %x at address 0x%x\n",
			I2C_NAME(client), saa7114_read(client, 0x00) >> 4,
			client->addr << 1);
	}

	return 0;
}

static int
saa7114_attach_adapter (struct i2c_adapter *adapter)
{
	dprintk(1,
		KERN_INFO
		"saa7114.c: starting probe for adapter %s (0x%x)\n",
		I2C_NAME(adapter), adapter->id);
	return i2c_probe(adapter, &addr_data, &saa7114_detect_client);
}

static int
saa7114_detach_client (struct i2c_client *client)
{
	struct saa7114 *decoder = i2c_get_clientdata(client);
	int err;

	err = i2c_detach_client(client);
	if (err) {
		return err;
	}

	kfree(decoder);
	kfree(client);

	return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver i2c_driver_saa7114 = {
	.owner = THIS_MODULE,
	.name = "saa7114",

	.id = I2C_DRIVERID_SAA7114,
	.flags = I2C_DF_NOTIFY,

	.attach_adapter = saa7114_attach_adapter,
	.detach_client = saa7114_detach_client,
	.command = saa7114_command,
};

static int __init
saa7114_init (void)
{
	return i2c_add_driver(&i2c_driver_saa7114);
}

static void __exit
saa7114_exit (void)
{
	i2c_del_driver(&i2c_driver_saa7114);
}

module_init(saa7114_init);
module_exit(saa7114_exit);