vpx3220.c

linux-2.6.15.6

			return status;

		if ((status & 0x20) == 0) {
			res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;

			switch (status & 0x18) {

			case 0x00:
			case 0x10:
			case 0x14:
			case 0x18:
				res |= DECODER_STATUS_PAL;
				break;

			case 0x08:
				res |= DECODER_STATUS_SECAM;
				break;

			case 0x04:
			case 0x0c:
			case 0x1c:
				res |= DECODER_STATUS_NTSC;
				break;
			}
		}

		*(int *) arg = res;
	}
		break;

	case DECODER_SET_NORM:
	{
		int *iarg = arg, data;
		int temp_input;

		/* Here we back up the input selection because it gets
		   overwritten when we fill the registers with the
                   choosen video norm */
		temp_input = vpx3220_fp_read(client, 0xf2);

		dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
			I2C_NAME(client), *iarg);
		switch (*iarg) {

		case VIDEO_MODE_NTSC:
			vpx3220_write_fp_block(client, init_ntsc,
					       sizeof(init_ntsc) >> 1);
			dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
				I2C_NAME(client));
			break;

		case VIDEO_MODE_PAL:
			vpx3220_write_fp_block(client, init_pal,
					       sizeof(init_pal) >> 1);
			dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
				I2C_NAME(client));
			break;

		case VIDEO_MODE_SECAM:
			vpx3220_write_fp_block(client, init_secam,
					       sizeof(init_secam) >> 1);
			dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
				I2C_NAME(client));
			break;

		case VIDEO_MODE_AUTO:
			/* FIXME This is only preliminary support */
			data = vpx3220_fp_read(client, 0xf2) & 0x20;
			vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
			dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
				I2C_NAME(client));
			break;

		default:
			return -EINVAL;

		}
		decoder->norm = *iarg;

		/* And here we set the backed up video input again */
		vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
		udelay(10);
	}
		break;

	case DECODER_SET_INPUT:
	{
		int *iarg = arg, data;

		/* RJ:  *iarg = 0: ST8 (PCTV) input
		 *iarg = 1: COMPOSITE  input
		 *iarg = 2: SVHS       input  */

		const int input[3][2] = {
			{0x0c, 0},
			{0x0d, 0},
			{0x0e, 1}
		};

		if (*iarg < 0 || *iarg > 2)
			return -EINVAL;

		dprintk(1, KERN_INFO "%s: input switched to %s\n",
			I2C_NAME(client), inputs[*iarg]);

		vpx3220_write(client, 0x33, input[*iarg][0]);

		data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
		if (data < 0)
			return data;
		/* 0x0010 is required to latch the setting */
		vpx3220_fp_write(client, 0xf2,
				 data | (input[*iarg][1] << 5) | 0x0010);

		udelay(10);
	}
		break;

	case DECODER_SET_OUTPUT:
	{
		int *iarg = arg;

		/* not much choice of outputs */
		if (*iarg != 0) {
			return -EINVAL;
		}
	}
		break;

	case DECODER_ENABLE_OUTPUT:
	{
		int *iarg = arg;

		dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
			I2C_NAME(client), *iarg);

		vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
	}
		break;

	case DECODER_SET_PICTURE:
	{
		struct video_picture *pic = arg;

		if (decoder->bright != pic->brightness) {
			/* We want -128 to 128 we get 0-65535 */
			decoder->bright = pic->brightness;
			vpx3220_write(client, 0xe6,
				      (decoder->bright - 32768) >> 8);
		}
		if (decoder->contrast != pic->contrast) {
			/* We want 0 to 64 we get 0-65535 */
			/* Bit 7 and 8 is for noise shaping */
			decoder->contrast = pic->contrast;
			vpx3220_write(client, 0xe7,
				      (decoder->contrast >> 10) + 192);
		}
		if (decoder->sat != pic->colour) {
			/* We want 0 to 4096 we get 0-65535 */
			decoder->sat = pic->colour;
			vpx3220_fp_write(client, 0xa0,
					 decoder->sat >> 4);
		}
		if (decoder->hue != pic->hue) {
			/* We want -512 to 512 we get 0-65535 */
			decoder->hue = pic->hue;
			vpx3220_fp_write(client, 0x1c,
					 ((decoder->hue - 32768) >> 6) & 0xFFF);
		}
	}
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int
vpx3220_init_client (struct i2c_client *client)
{
	vpx3220_write_block(client, init_common, sizeof(init_common));
	vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
	/* Default to PAL */
	vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);

	return 0;
}

/* -----------------------------------------------------------------------
 * Client managment code
 */

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */
static unsigned short normal_i2c[] =
    { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
	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 vpx3220_i2c_driver;

static int
vpx3220_detach_client (struct i2c_client *client)
{
	struct vpx3220 *decoder = i2c_get_clientdata(client);
	int err;

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

	kfree(decoder);
	kfree(client);

	return 0;
}

static int
vpx3220_detect_client (struct i2c_adapter *adapter,
		       int                 address,
		       int                 kind)
{
	int err;
	struct i2c_client *client;
	struct vpx3220 *decoder;

	dprintk(1, VPX3220_DEBUG "%s\n", __func__);

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality
	    (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
		return 0;

	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == NULL) {
		return -ENOMEM;
	}

	memset(client, 0, sizeof(struct i2c_client));

	client->addr = address;
	client->adapter = adapter;
	client->driver = &vpx3220_i2c_driver;
	client->flags = I2C_CLIENT_ALLOW_USE;

	/* Check for manufacture ID and part number */
	if (kind < 0) {
		u8 id;
		u16 pn;

		id = vpx3220_read(client, 0x00);
		if (id != 0xec) {
			dprintk(1,
				KERN_INFO
				"vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
				id);
			kfree(client);
			return 0;
		}

		pn = (vpx3220_read(client, 0x02) << 8) +
		    vpx3220_read(client, 0x01);
		switch (pn) {
		case 0x4680:
			strlcpy(I2C_NAME(client), "vpx3220a",
				sizeof(I2C_NAME(client)));
			break;
		case 0x4260:
			strlcpy(I2C_NAME(client), "vpx3216b",
				sizeof(I2C_NAME(client)));
			break;
		case 0x4280:
			strlcpy(I2C_NAME(client), "vpx3214c",
				sizeof(I2C_NAME(client)));
			break;
		default:
			dprintk(1,
				KERN_INFO 
				"%s: Wrong part number (0x%04x)\n",
				__func__, pn);
			kfree(client);
			return 0;
		}
	} else {
		strlcpy(I2C_NAME(client), "forced vpx32xx",
			sizeof(I2C_NAME(client)));
	}

	decoder = kmalloc(sizeof(struct vpx3220), GFP_KERNEL);
	if (decoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	memset(decoder, 0, sizeof(struct vpx3220));
	decoder->norm = VIDEO_MODE_PAL;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	i2c_set_clientdata(client, decoder);

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

	dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
		I2C_NAME(client), client->addr << 1);

	vpx3220_init_client(client);

	return 0;
}

static int
vpx3220_attach_adapter (struct i2c_adapter *adapter)
{
	int ret;

	ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
	dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
		__func__, ret);
	return ret;
}

/* -----------------------------------------------------------------------
 * Driver initialization and cleanup code
 */

static struct i2c_driver vpx3220_i2c_driver = {
	.owner = THIS_MODULE,
	.name = "vpx3220",

	.id = I2C_DRIVERID_VPX3220,
	.flags = I2C_DF_NOTIFY,

	.attach_adapter = vpx3220_attach_adapter,
	.detach_client = vpx3220_detach_client,
	.command = vpx3220_command,
};

static int __init
vpx3220_init (void)
{
	return i2c_add_driver(&vpx3220_i2c_driver);
}

static void __exit
vpx3220_cleanup (void)
{
	i2c_del_driver(&vpx3220_i2c_driver);
}

module_init(vpx3220_init);
module_exit(vpx3220_cleanup);

MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
MODULE_AUTHOR("Laurent Pinchart");
MODULE_LICENSE("GPL");