cx25840-core.c

LINUX 2.6.17.4的源码

	}
	case 0x2: return V4L2_STD_NTSC_M_JP;
	case 0x3: return V4L2_STD_NTSC_443;
	case 0x4: return V4L2_STD_PAL;
	case 0x5: return V4L2_STD_PAL_M;
	case 0x6: return V4L2_STD_PAL_N;
	case 0x7: return V4L2_STD_PAL_Nc;
	case 0x8: return V4L2_STD_PAL_60;
	case 0xc: return V4L2_STD_SECAM;
	default: return V4L2_STD_UNKNOWN;
	}
}

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

static int set_v4lctrl(struct i2c_client *client, struct v4l2_control *ctrl)
{
	struct cx25840_state *state = i2c_get_clientdata(client);

	switch (ctrl->id) {
	case CX25840_CID_ENABLE_PVR150_WORKAROUND:
		state->pvr150_workaround = ctrl->value;
		set_input(client, state->vid_input, state->aud_input);
		break;

	case V4L2_CID_BRIGHTNESS:
		if (ctrl->value < 0 || ctrl->value > 255) {
			v4l_err(client, "invalid brightness setting %d\n",
				    ctrl->value);
			return -ERANGE;
		}

		cx25840_write(client, 0x414, ctrl->value - 128);
		break;

	case V4L2_CID_CONTRAST:
		if (ctrl->value < 0 || ctrl->value > 127) {
			v4l_err(client, "invalid contrast setting %d\n",
				    ctrl->value);
			return -ERANGE;
		}

		cx25840_write(client, 0x415, ctrl->value << 1);
		break;

	case V4L2_CID_SATURATION:
		if (ctrl->value < 0 || ctrl->value > 127) {
			v4l_err(client, "invalid saturation setting %d\n",
				    ctrl->value);
			return -ERANGE;
		}

		cx25840_write(client, 0x420, ctrl->value << 1);
		cx25840_write(client, 0x421, ctrl->value << 1);
		break;

	case V4L2_CID_HUE:
		if (ctrl->value < -127 || ctrl->value > 127) {
			v4l_err(client, "invalid hue setting %d\n", ctrl->value);
			return -ERANGE;
		}

		cx25840_write(client, 0x422, ctrl->value);
		break;

	case V4L2_CID_AUDIO_VOLUME:
	case V4L2_CID_AUDIO_BASS:
	case V4L2_CID_AUDIO_TREBLE:
	case V4L2_CID_AUDIO_BALANCE:
	case V4L2_CID_AUDIO_MUTE:
		return cx25840_audio(client, VIDIOC_S_CTRL, ctrl);

	default:
		return -EINVAL;
	}

	return 0;
}

static int get_v4lctrl(struct i2c_client *client, struct v4l2_control *ctrl)
{
	struct cx25840_state *state = i2c_get_clientdata(client);

	switch (ctrl->id) {
	case CX25840_CID_ENABLE_PVR150_WORKAROUND:
		ctrl->value = state->pvr150_workaround;
		break;
	case V4L2_CID_BRIGHTNESS:
		ctrl->value = (s8)cx25840_read(client, 0x414) + 128;
		break;
	case V4L2_CID_CONTRAST:
		ctrl->value = cx25840_read(client, 0x415) >> 1;
		break;
	case V4L2_CID_SATURATION:
		ctrl->value = cx25840_read(client, 0x420) >> 1;
		break;
	case V4L2_CID_HUE:
		ctrl->value = (s8)cx25840_read(client, 0x422);
		break;
	case V4L2_CID_AUDIO_VOLUME:
	case V4L2_CID_AUDIO_BASS:
	case V4L2_CID_AUDIO_TREBLE:
	case V4L2_CID_AUDIO_BALANCE:
	case V4L2_CID_AUDIO_MUTE:
		return cx25840_audio(client, VIDIOC_G_CTRL, ctrl);
	default:
		return -EINVAL;
	}

	return 0;
}

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

static int get_v4lfmt(struct i2c_client *client, struct v4l2_format *fmt)
{
	switch (fmt->type) {
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		return cx25840_vbi(client, VIDIOC_G_FMT, fmt);
	default:
		return -EINVAL;
	}

	return 0;
}

static int set_v4lfmt(struct i2c_client *client, struct v4l2_format *fmt)
{
	struct v4l2_pix_format *pix;
	int HSC, VSC, Vsrc, Hsrc, filter, Vlines;
	int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_NTSC);

	switch (fmt->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		pix = &(fmt->fmt.pix);

		Vsrc = (cx25840_read(client, 0x476) & 0x3f) << 4;
		Vsrc |= (cx25840_read(client, 0x475) & 0xf0) >> 4;

		Hsrc = (cx25840_read(client, 0x472) & 0x3f) << 4;
		Hsrc |= (cx25840_read(client, 0x471) & 0xf0) >> 4;

		Vlines = pix->height + (is_pal ? 4 : 7);

		if ((pix->width * 16 < Hsrc) || (Hsrc < pix->width) ||
		    (Vlines * 8 < Vsrc) || (Vsrc < Vlines)) {
			v4l_err(client, "%dx%d is not a valid size!\n",
				    pix->width, pix->height);
			return -ERANGE;
		}

		HSC = (Hsrc * (1 << 20)) / pix->width - (1 << 20);
		VSC = (1 << 16) - (Vsrc * (1 << 9) / Vlines - (1 << 9));
		VSC &= 0x1fff;

		if (pix->width >= 385)
			filter = 0;
		else if (pix->width > 192)
			filter = 1;
		else if (pix->width > 96)
			filter = 2;
		else
			filter = 3;

		v4l_dbg(1, cx25840_debug, client, "decoder set size %dx%d -> scale  %ux%u\n",
			    pix->width, pix->height, HSC, VSC);

		/* HSCALE=HSC */
		cx25840_write(client, 0x418, HSC & 0xff);
		cx25840_write(client, 0x419, (HSC >> 8) & 0xff);
		cx25840_write(client, 0x41a, HSC >> 16);
		/* VSCALE=VSC */
		cx25840_write(client, 0x41c, VSC & 0xff);
		cx25840_write(client, 0x41d, VSC >> 8);
		/* VS_INTRLACE=1 VFILT=filter */
		cx25840_write(client, 0x41e, 0x8 | filter);
		break;

	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		return cx25840_vbi(client, VIDIOC_S_FMT, fmt);

	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return cx25840_vbi(client, VIDIOC_S_FMT, fmt);

	default:
		return -EINVAL;
	}

	return 0;
}

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

static struct v4l2_queryctrl cx25840_qctrl[] = {
	{
		.id            = V4L2_CID_BRIGHTNESS,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Brightness",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 1,
		.default_value = 128,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_CONTRAST,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Contrast",
		.minimum       = 0,
		.maximum       = 127,
		.step          = 1,
		.default_value = 64,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_SATURATION,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Saturation",
		.minimum       = 0,
		.maximum       = 127,
		.step          = 1,
		.default_value = 64,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_HUE,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Hue",
		.minimum       = -128,
		.maximum       = 127,
		.step          = 1,
		.default_value = 0,
		.flags 	       = 0,
	}, {
		.id            = V4L2_CID_AUDIO_VOLUME,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Volume",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 58880,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_AUDIO_BALANCE,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Balance",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_AUDIO_MUTE,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
		.name          = "Mute",
		.minimum       = 0,
		.maximum       = 1,
		.step          = 1,
		.default_value = 1,
		.flags         = 0,
	}, {
		.id            = V4L2_CID_AUDIO_BASS,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Bass",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
	}, {
		.id            = V4L2_CID_AUDIO_TREBLE,
		.type          = V4L2_CTRL_TYPE_INTEGER,
		.name          = "Treble",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
	},
};

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

static int cx25840_command(struct i2c_client *client, unsigned int cmd,
			   void *arg)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	struct v4l2_tuner *vt = arg;
	struct v4l2_routing *route = arg;

	switch (cmd) {
#ifdef CONFIG_VIDEO_ADV_DEBUG
	/* ioctls to allow direct access to the
	 * cx25840 registers for testing */
	case VIDIOC_INT_G_REGISTER:
	{
		struct v4l2_register *reg = arg;

		if (reg->i2c_id != I2C_DRIVERID_CX25840)
			return -EINVAL;
		reg->val = cx25840_read(client, reg->reg & 0x0fff);
		break;
	}

	case VIDIOC_INT_S_REGISTER:
	{
		struct v4l2_register *reg = arg;

		if (reg->i2c_id != I2C_DRIVERID_CX25840)
			return -EINVAL;
		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;
		cx25840_write(client, reg->reg & 0x0fff, reg->val & 0xff);
		break;
	}
#endif

	case VIDIOC_INT_DECODE_VBI_LINE:
		return cx25840_vbi(client, cmd, arg);

	case VIDIOC_INT_AUDIO_CLOCK_FREQ:
		return cx25840_audio(client, cmd, arg);

	case VIDIOC_STREAMON:
		v4l_dbg(1, cx25840_debug, client, "enable output\n");
		cx25840_write(client, 0x115, 0x8c);
		cx25840_write(client, 0x116, 0x07);
		break;

	case VIDIOC_STREAMOFF:
		v4l_dbg(1, cx25840_debug, client, "disable output\n");
		cx25840_write(client, 0x115, 0x00);
		cx25840_write(client, 0x116, 0x00);
		break;

	case VIDIOC_LOG_STATUS:
		log_status(client);
		break;

	case VIDIOC_G_CTRL:
		return get_v4lctrl(client, (struct v4l2_control *)arg);

	case VIDIOC_S_CTRL:
		return set_v4lctrl(client, (struct v4l2_control *)arg);

	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *qc = arg;
		int i;

		for (i = 0; i < ARRAY_SIZE(cx25840_qctrl); i++)
			if (qc->id && qc->id == cx25840_qctrl[i].id) {
				memcpy(qc, &cx25840_qctrl[i], sizeof(*qc));
				return 0;
			}
		return -EINVAL;
	}

	case VIDIOC_G_STD:
		*(v4l2_std_id *)arg = cx25840_get_v4lstd(client);
		break;

	case VIDIOC_S_STD:
		state->radio = 0;
		return set_v4lstd(client, *(v4l2_std_id *)arg);

	case AUDC_SET_RADIO:
		state->radio = 1;
		break;

	case VIDIOC_INT_G_VIDEO_ROUTING:
		route->input = state->vid_input;
		route->output = 0;
		break;

	case VIDIOC_INT_S_VIDEO_ROUTING:
		return set_input(client, route->input, state->aud_input);

	case VIDIOC_INT_G_AUDIO_ROUTING:
		route->input = state->aud_input;
		route->output = 0;
		break;

	case VIDIOC_INT_S_AUDIO_ROUTING:
		return set_input(client, state->vid_input, route->input);

	case VIDIOC_S_FREQUENCY:
		input_change(client);
		break;

	case VIDIOC_G_TUNER:
	{
		u8 mode = cx25840_read(client, 0x804);