saa7127.c

linux-2.6.15.6

				(enable << 7) | (state->cc_enable << 6) | 0x11);
		state->xds_enable = enable;
	}
	if (!enable)
		return 0;

	saa7127_dbg_highvol("XDS data: %04x\n", xds);
	saa7127_write(client, SAA7127_REG_LINE_21_EVEN_0, xds & 0xff);
	saa7127_write(client, SAA7127_REG_LINE_21_EVEN_1, xds >> 8);
	state->xds_data = xds;
	return 0;
}

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

static int saa7127_set_wss(struct i2c_client *client, struct v4l2_sliced_vbi_data *data)
{
	struct saa7127_state *state = i2c_get_clientdata(client);
	int enable = (data->line != 0);

	if (enable && (data->field != 0 || data->line != 23))
		return -EINVAL;
	if (state->wss_enable != enable) {
		saa7127_dbg("Turn WSS %s\n", enable ? "on" : "off");
		saa7127_write(client, 0x27, enable << 7);
		state->wss_enable = enable;
	}
	if (!enable)
		return 0;

	saa7127_write(client, 0x26, data->data[0]);
	saa7127_write(client, 0x27, 0x80 | (data->data[1] & 0x3f));
	saa7127_dbg("WSS mode: %s\n", wss_strs[data->data[0] & 0xf]);
	state->wss_mode = (data->data[1] & 0x3f) << 8 | data->data[0];
	return 0;
}

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

static int saa7127_set_video_enable(struct i2c_client *client, int enable)
{
	struct saa7127_state *state = i2c_get_clientdata(client);

	if (enable) {
		saa7127_dbg("Enable Video Output\n");
		saa7127_write(client, 0x2d, state->reg_2d);
		saa7127_write(client, 0x61, state->reg_61);
	} else {
		saa7127_dbg("Disable Video Output\n");
		saa7127_write(client, 0x2d, (state->reg_2d & 0xf0));
		saa7127_write(client, 0x61, (state->reg_61 | 0xc0));
	}
	state->video_enable = enable;
	return 0;
}

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

static int saa7127_set_std(struct i2c_client *client, v4l2_std_id std)
{
	struct saa7127_state *state = i2c_get_clientdata(client);
	const struct i2c_reg_value *inittab;

	if (std & V4L2_STD_525_60) {
		saa7127_dbg("Selecting 60 Hz video Standard\n");
		inittab = saa7127_init_config_60hz;
		state->reg_61 = SAA7127_60HZ_DAC_CONTROL;
	} else {
		saa7127_dbg("Selecting 50 Hz video Standard\n");
		inittab = saa7127_init_config_50hz;
		state->reg_61 = SAA7127_50HZ_DAC_CONTROL;
	}

	/* Write Table */
	saa7127_write_inittab(client, inittab);
	state->std = std;
	return 0;
}

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

static int saa7127_set_output_type(struct i2c_client *client, int output)
{
	struct saa7127_state *state = i2c_get_clientdata(client);

	switch (output) {
	case SAA7127_OUTPUT_TYPE_RGB:
		state->reg_2d = 0x0f;	/* RGB + CVBS (for sync) */
		state->reg_3a = 0x13;	/* by default switch YUV to RGB-matrix on */
		break;

	case SAA7127_OUTPUT_TYPE_COMPOSITE:
		state->reg_2d = 0x08;	/* 00001000 CVBS only, RGB DAC's off (high impedance mode) */
		state->reg_3a = 0x13;	/* by default switch YUV to RGB-matrix on */
		break;

	case SAA7127_OUTPUT_TYPE_SVIDEO:
		state->reg_2d = 0xff;	/* 11111111  croma -> R, luma -> CVBS + G + B */
		state->reg_3a = 0x13;	/* by default switch YUV to RGB-matrix on */
		break;

	case SAA7127_OUTPUT_TYPE_YUV_V:
		state->reg_2d = 0x4f;	/* reg 2D = 01001111, all DAC's on, RGB + VBS */
		state->reg_3a = 0x0b;	/* reg 3A = 00001011, bypass RGB-matrix */
		break;

	case SAA7127_OUTPUT_TYPE_YUV_C:
		state->reg_2d = 0x0f;	/* reg 2D = 00001111, all DAC's on, RGB + CVBS */
		state->reg_3a = 0x0b;	/* reg 3A = 00001011, bypass RGB-matrix */
		break;

	case SAA7127_OUTPUT_TYPE_BOTH:
		state->reg_2d = 0xbf;
		state->reg_3a = 0x13;	/* by default switch YUV to RGB-matrix on */
		break;

	default:
		return -EINVAL;
	}
	saa7127_dbg("Selecting %s output type\n", output_strs[output]);

	/* Configure Encoder */
	saa7127_write(client, 0x2d, state->reg_2d);
	saa7127_write(client, 0x3a, state->reg_3a | state->reg_3a_cb);
	state->output_type = output;
	return 0;
}

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

static int saa7127_set_input_type(struct i2c_client *client, int input)
{
	struct saa7127_state *state = i2c_get_clientdata(client);

	switch (input) {
	case SAA7127_INPUT_TYPE_NORMAL:	/* avia */
		saa7127_dbg("Selecting Normal Encoder Input\n");
		state->reg_3a_cb = 0;
		break;

	case SAA7127_INPUT_TYPE_TEST_IMAGE:	/* color bar */
		saa7127_dbg("Selecting Color Bar generator\n");
		state->reg_3a_cb = 0x80;
		break;

	default:
		return -EINVAL;
	}
	saa7127_write(client, 0x3a, state->reg_3a | state->reg_3a_cb);
	state->input_type = input;
	return 0;
}

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

static int saa7127_command(struct i2c_client *client,
			   unsigned int cmd, void *arg)
{
	struct saa7127_state *state = i2c_get_clientdata(client);
	struct v4l2_format *fmt = arg;
	int *iarg = arg;

	switch (cmd) {
	case VIDIOC_S_STD:
		if (state->std == *(v4l2_std_id *)arg)
			break;
		return saa7127_set_std(client, *(v4l2_std_id *)arg);

	case VIDIOC_G_STD:
		*(v4l2_std_id *)arg = state->std;
		break;

	case VIDIOC_S_INPUT:
		if (state->input_type == *iarg)
			break;
		return saa7127_set_input_type(client, *iarg);

	case VIDIOC_S_OUTPUT:
		if (state->output_type == *iarg)
			break;
		return saa7127_set_output_type(client, *iarg);

	case VIDIOC_STREAMON:
	case VIDIOC_STREAMOFF:
		if (state->video_enable == (cmd == VIDIOC_STREAMON))
			break;
		return saa7127_set_video_enable(client, cmd == VIDIOC_STREAMON);

	case VIDIOC_G_FMT:
		if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
			return -EINVAL;

		memset(&fmt->fmt.sliced, 0, sizeof(fmt->fmt.sliced));
		if (state->vps_enable)
			fmt->fmt.sliced.service_lines[0][16] = V4L2_SLICED_VPS;
		if (state->wss_enable)
			fmt->fmt.sliced.service_lines[0][23] = V4L2_SLICED_WSS_625;
		if (state->cc_enable) {
			fmt->fmt.sliced.service_lines[0][21] = V4L2_SLICED_CAPTION_525;
			fmt->fmt.sliced.service_lines[1][21] = V4L2_SLICED_CAPTION_525;
		}
		fmt->fmt.sliced.service_set =
			(state->vps_enable ? V4L2_SLICED_VPS : 0) |
			(state->wss_enable ? V4L2_SLICED_WSS_625 : 0) |
			(state->cc_enable ? V4L2_SLICED_CAPTION_525 : 0);
		break;

	case VIDIOC_LOG_STATUS:
		saa7127_info("Standard: %s\n", (state->std & V4L2_STD_525_60) ? "60 Hz" : "50 Hz");
		saa7127_info("Input:    %s\n", state->input_type ?  "color bars" : "normal");
		saa7127_info("Output:   %s\n", state->video_enable ?
			output_strs[state->output_type] : "disabled");
		saa7127_info("WSS:      %s\n", state->wss_enable ?
			wss_strs[state->wss_mode] : "disabled");
		saa7127_info("VPS:      %s\n", state->vps_enable ? "enabled" : "disabled");
		saa7127_info("CC:       %s\n", state->cc_enable ? "enabled" : "disabled");
		break;

#ifdef CONFIG_VIDEO_ADV_DEBUG
	case VIDIOC_INT_G_REGISTER:
	{
		struct v4l2_register *reg = arg;

		if (reg->i2c_id != I2C_DRIVERID_SAA7127)
			return -EINVAL;
		reg->val = saa7127_read(client, reg->reg & 0xff);
		break;
	}

	case VIDIOC_INT_S_REGISTER:
	{
		struct v4l2_register *reg = arg;

		if (reg->i2c_id != I2C_DRIVERID_SAA7127)
			return -EINVAL;
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		saa7127_write(client, reg->reg & 0xff, reg->val & 0xff);
		break;
	}
#endif

	case VIDIOC_INT_S_VBI_DATA:
	{
		struct v4l2_sliced_vbi_data *data = arg;

		switch (data->id) {
			case V4L2_SLICED_WSS_625:
				return saa7127_set_wss(client, data);
			case V4L2_SLICED_VPS:
				return saa7127_set_vps(client, data);
			case V4L2_SLICED_CAPTION_525:
				if (data->field == 0)
					return saa7127_set_cc(client, data);
				return saa7127_set_xds(client, data);
			default:
				return -EINVAL;
		}
		break;
	}

	case VIDIOC_INT_G_CHIP_IDENT:
		*(enum v4l2_chip_ident *)arg = state->ident;
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

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

static struct i2c_driver i2c_driver_saa7127;

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

static int saa7127_attach(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *client;
	struct saa7127_state *state;
	struct v4l2_sliced_vbi_data vbi = { 0, 0, 0, 0 };  /* set to disabled */
	int read_result = 0;

	/* 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_saa7127;
	client->flags = I2C_CLIENT_ALLOW_USE;
	snprintf(client->name, sizeof(client->name) - 1, "saa7127");

	saa7127_dbg("detecting saa7127 client on address 0x%x\n", address << 1);

	/* First test register 0: Bits 5-7 are a version ID (should be 0),
	   and bit 2 should also be 0.
	   This is rather general, so the second test is more specific and
	   looks at the 'ending point of burst in clock cycles' which is
	   0x1d after a reset and not expected to ever change. */
	if ((saa7127_read(client, 0) & 0xe4) != 0 ||
			(saa7127_read(client, 0x29) & 0x3f) != 0x1d) {
		saa7127_dbg("saa7127 not found\n");
		kfree(client);
		return 0;
	}
	state = kmalloc(sizeof(struct saa7127_state), GFP_KERNEL);

	if (state == NULL) {
		kfree(client);
		return (-ENOMEM);
	}

	i2c_set_clientdata(client, state);
	memset(state, 0, sizeof(struct saa7127_state));

	/* Configure Encoder */

	saa7127_dbg("Configuring encoder\n");
	saa7127_write_inittab(client, saa7127_init_config_common);
	saa7127_set_std(client, V4L2_STD_NTSC);
	saa7127_set_output_type(client, SAA7127_OUTPUT_TYPE_BOTH);
	saa7127_set_vps(client, &vbi);
	saa7127_set_wss(client, &vbi);
	saa7127_set_cc(client, &vbi);
	saa7127_set_xds(client, &vbi);
	if (test_image == 1) {
		/* The Encoder has an internal Colorbar generator */
		/* This can be used for debugging */
		saa7127_set_input_type(client, SAA7127_INPUT_TYPE_TEST_IMAGE);
	} else {
		saa7127_set_input_type(client, SAA7127_INPUT_TYPE_NORMAL);
	}
	saa7127_set_video_enable(client, 1);

	/* Detect if it's an saa7129 */
	read_result = saa7127_read(client, SAA7129_REG_FADE_KEY_COL2);
	saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, 0xaa);
	if (saa7127_read(client, SAA7129_REG_FADE_KEY_COL2) == 0xaa) {
		saa7127_info("saa7129 found @ 0x%x (%s)\n", address << 1, adapter->name);
		saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, read_result);
		saa7127_write_inittab(client, saa7129_init_config_extra);
		state->ident = V4L2_IDENT_SAA7129;
	} else {
		saa7127_info("saa7127 found @ 0x%x (%s)\n", address << 1, adapter->name);
		state->ident = V4L2_IDENT_SAA7127;
	}

	i2c_attach_client(client);

	return 0;
}

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

static int saa7127_probe(struct i2c_adapter *adapter)
{
#ifdef I2C_CLASS_TV_ANALOG
	if (adapter->class & I2C_CLASS_TV_ANALOG)
#else
	if (adapter->id == I2C_HW_B_BT848)
#endif
		return i2c_probe(adapter, &addr_data, saa7127_attach);
	return 0;
}

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

static int saa7127_detach(struct i2c_client *client)
{
	struct saa7127_state *state = i2c_get_clientdata(client);
	int err;

	/* Turn off TV output */
	saa7127_set_video_enable(client, 0);

	err = i2c_detach_client(client);

	if (err) {
		return err;
	}

	kfree(state);
	kfree(client);
	return 0;
}

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

static struct i2c_driver i2c_driver_saa7127 = {
	.name = "saa7127",
	.id = I2C_DRIVERID_SAA7127,
	.flags = I2C_DF_NOTIFY,
	.attach_adapter = saa7127_probe,
	.detach_client = saa7127_detach,
	.command = saa7127_command,
	.owner = THIS_MODULE,
};


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

static int __init saa7127_init_module(void)
{
	return i2c_add_driver(&i2c_driver_saa7127);
}

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

static void __exit saa7127_cleanup_module(void)
{
	i2c_del_driver(&i2c_driver_saa7127);
}

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

module_init(saa7127_init_module);
module_exit(saa7127_cleanup_module);