saa7127.c

来自「trident tm5600的linux驱动」· C语言 代码 · 共 786 行 · 第 1/2 页

		saa7127_write(client, SAA7127_REG_CLOSED_CAPTION,
				(enable << 7) | (state->cc_enable << 6) | 0x11);
		state->xds_enable = enable;
	}
	if (!enable)
		return 0;

	v4l_dbg(2, debug, client, "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) {
		v4l_dbg(1, debug, client, "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));
	v4l_dbg(1, debug, client,
		"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) {
		v4l_dbg(1, debug, client, "Enable Video Output\n");
		saa7127_write(client, 0x2d, state->reg_2d);
		saa7127_write(client, 0x61, state->reg_61);
	} else {
		v4l_dbg(1, debug, client, "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) {
		v4l_dbg(1, debug, client, "Selecting 60 Hz video Standard\n");
		inittab = saa7127_init_config_60hz;
		state->reg_61 = SAA7127_60HZ_DAC_CONTROL;
	} else {
		v4l_dbg(1, debug, client, "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;
	}
	v4l_dbg(1, debug, client,
		"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 */
		v4l_dbg(1, debug, client, "Selecting Normal Encoder Input\n");
		state->reg_3a_cb = 0;
		break;

	case SAA7127_INPUT_TYPE_TEST_IMAGE:	/* color bar */
		v4l_dbg(1, debug, client, "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;
	struct v4l2_routing *route = arg;

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

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

	case VIDIOC_INT_G_VIDEO_ROUTING:
		route->input = state->input_type;
		route->output = state->output_type;
		break;

	case VIDIOC_INT_S_VIDEO_ROUTING:
	{
		int rc = 0;

		if (state->input_type != route->input)
			rc = saa7127_set_input_type(client, route->input);
		if (rc == 0 && state->output_type != route->output)
			rc = saa7127_set_output_type(client, route->output);
		return rc;
	}

	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:
		v4l_info(client, "Standard: %s\n", (state->std & V4L2_STD_525_60) ? "60 Hz" : "50 Hz");
		v4l_info(client, "Input:    %s\n", state->input_type ?  "color bars" : "normal");
		v4l_info(client, "Output:   %s\n", state->video_enable ?
			output_strs[state->output_type] : "disabled");
		v4l_info(client, "WSS:      %s\n", state->wss_enable ?
			wss_strs[state->wss_mode] : "disabled");
		v4l_info(client, "VPS:      %s\n", state->vps_enable ? "enabled" : "disabled");
		v4l_info(client, "CC:       %s\n", state->cc_enable ? "enabled" : "disabled");
		break;

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

		if (!v4l2_chip_match_i2c_client(client,
					reg->match_type, reg->match_chip))
			return -EINVAL;
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		if (cmd == VIDIOC_DBG_G_REGISTER)
			reg->val = saa7127_read(client, reg->reg & 0xff);
		else
			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_G_CHIP_IDENT:
		return v4l2_chip_ident_i2c_client(client, arg, state->ident, 0);

	default:
		return -EINVAL;
	}
	return 0;
}

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

static int saa7127_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct saa7127_state *state;
	struct v4l2_sliced_vbi_data vbi = { 0, 0, 0, 0 };  /* set to disabled */

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
	snprintf(client->name, sizeof(client->name) - 1, "saa7127");

#endif
	v4l_dbg(1, debug, client, "detecting saa7127 client on address 0x%x\n",
			client->addr << 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) {
		v4l_dbg(1, debug, client, "saa7127 not found\n");
		return -ENODEV;
	}
	state = kzalloc(sizeof(struct saa7127_state), GFP_KERNEL);

	if (state == NULL)
		return -ENOMEM;

	i2c_set_clientdata(client, state);

	/* Configure Encoder */

	v4l_dbg(1, debug, client, "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);

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
	if (id->driver_data) {	/* Chip type is already known */
		state->ident = id->driver_data;
	} else {		/* Needs detection */
#else
	{
#endif
		int read_result;

		/* 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_write(client, SAA7129_REG_FADE_KEY_COL2,
					read_result);
			state->ident = V4L2_IDENT_SAA7129;
			strlcpy(client->name, "saa7129", I2C_NAME_SIZE);
		} else {
			state->ident = V4L2_IDENT_SAA7127;
			strlcpy(client->name, "saa7127", I2C_NAME_SIZE);
		}
	}

	v4l_info(client, "%s found @ 0x%x (%s)\n", client->name,
			client->addr << 1, client->adapter->name);
	if (state->ident == V4L2_IDENT_SAA7129)
		saa7127_write_inittab(client, saa7129_init_config_extra);
	return 0;
}

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

static int saa7127_remove(struct i2c_client *client)
{
	/* Turn off TV output */
	saa7127_set_video_enable(client, 0);
	kfree(i2c_get_clientdata(client));
	return 0;
}

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

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
static struct i2c_device_id saa7127_id[] = {
	{ "saa7127_auto", 0 },	/* auto-detection */
	{ "saa7126", V4L2_IDENT_SAA7127 },
	{ "saa7127", V4L2_IDENT_SAA7127 },
	{ "saa7128", V4L2_IDENT_SAA7129 },
	{ "saa7129", V4L2_IDENT_SAA7129 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, saa7127_id);

#endif
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "saa7127",
	.driverid = I2C_DRIVERID_SAA7127,
	.command = saa7127_command,
	.probe = saa7127_probe,
	.remove = saa7127_remove,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
	.id_table = saa7127_id,
#endif
};