cx25840-core.c

trident tm5600的linux驱动

	/* Sets Luma and UV Low pass filters */
	cx25840_write(client, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));

	/* Enables comb filters */
	cx25840_write(client, 0x47b, comb);

	/* Sets SC Step*/
	cx25840_write(client, 0x47c, sc);
	cx25840_write(client, 0x47d, 0xff & sc >> 8);
	cx25840_write(client, 0x47e, 0xff & sc >> 16);

	/* Sets VBI parameters */
	if (std & V4L2_STD_625_50) {
		cx25840_write(client, 0x47f, 0x01);
		state->vbi_line_offset = 5;
	} else {
		cx25840_write(client, 0x47f, 0x00);
		state->vbi_line_offset = 8;
	}
}

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

static void input_change(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	v4l2_std_id std = state->std;

	/* Follow step 8c and 8d of section 3.16 in the cx25840 datasheet */
	if (std & V4L2_STD_SECAM) {
		cx25840_write(client, 0x402, 0);
	}
	else {
		cx25840_write(client, 0x402, 0x04);
		cx25840_write(client, 0x49f, (std & V4L2_STD_NTSC) ? 0x14 : 0x11);
	}
	cx25840_and_or(client, 0x401, ~0x60, 0);
	cx25840_and_or(client, 0x401, ~0x60, 0x60);
	cx25840_and_or(client, 0x810, ~0x01, 1);

	if (state->radio) {
		cx25840_write(client, 0x808, 0xf9);
		cx25840_write(client, 0x80b, 0x00);
	}
	else if (std & V4L2_STD_525_60) {
		/* Certain Hauppauge PVR150 models have a hardware bug
		   that causes audio to drop out. For these models the
		   audio standard must be set explicitly.
		   To be precise: it affects cards with tuner models
		   85, 99 and 112 (model numbers from tveeprom). */
		int hw_fix = state->pvr150_workaround;

		if (std == V4L2_STD_NTSC_M_JP) {
			/* Japan uses EIAJ audio standard */
			cx25840_write(client, 0x808, hw_fix ? 0x2f : 0xf7);
		} else if (std == V4L2_STD_NTSC_M_KR) {
			/* South Korea uses A2 audio standard */
			cx25840_write(client, 0x808, hw_fix ? 0x3f : 0xf8);
		} else {
			/* Others use the BTSC audio standard */
			cx25840_write(client, 0x808, hw_fix ? 0x1f : 0xf6);
		}
		cx25840_write(client, 0x80b, 0x00);
	} else if (std & V4L2_STD_PAL) {
		/* Follow tuner change procedure for PAL */
		cx25840_write(client, 0x808, 0xff);
		cx25840_write(client, 0x80b, 0x10);
	} else if (std & V4L2_STD_SECAM) {
		/* Select autodetect for SECAM */
		cx25840_write(client, 0x808, 0xff);
		cx25840_write(client, 0x80b, 0x10);
	}

	cx25840_and_or(client, 0x810, ~0x01, 0);
}

static int set_input(struct i2c_client *client, enum cx25840_video_input vid_input,
						enum cx25840_audio_input aud_input)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	u8 is_composite = (vid_input >= CX25840_COMPOSITE1 &&
			   vid_input <= CX25840_COMPOSITE8);
	u8 reg;

	v4l_dbg(1, cx25840_debug, client,
		"decoder set video input %d, audio input %d\n",
		vid_input, aud_input);

	if (vid_input >= CX25840_VIN1_CH1) {
		v4l_dbg(1, cx25840_debug, client, "vid_input 0x%x\n",
			vid_input);
		reg = vid_input & 0xff;
		if ((vid_input & CX25840_SVIDEO_ON) == CX25840_SVIDEO_ON)
			is_composite = 0;
		else
			is_composite = 1;

		v4l_dbg(1, cx25840_debug, client, "mux cfg 0x%x comp=%d\n",
			reg, is_composite);
	} else
	if (is_composite) {
		reg = 0xf0 + (vid_input - CX25840_COMPOSITE1);
	} else {
		int luma = vid_input & 0xf0;
		int chroma = vid_input & 0xf00;

		if ((vid_input & ~0xff0) ||
		    luma < CX25840_SVIDEO_LUMA1 || luma > CX25840_SVIDEO_LUMA8 ||
		    chroma < CX25840_SVIDEO_CHROMA4 || chroma > CX25840_SVIDEO_CHROMA8) {
			v4l_err(client, "0x%04x is not a valid video input!\n",
				vid_input);
			return -EINVAL;
		}
		reg = 0xf0 + ((luma - CX25840_SVIDEO_LUMA1) >> 4);
		if (chroma >= CX25840_SVIDEO_CHROMA7) {
			reg &= 0x3f;
			reg |= (chroma - CX25840_SVIDEO_CHROMA7) >> 2;
		} else {
			reg &= 0xcf;
			reg |= (chroma - CX25840_SVIDEO_CHROMA4) >> 4;
		}
	}

	/* The caller has previously prepared the correct routing
	 * configuration in reg (for the cx23885) so we have no
	 * need to attempt to flip bits for earlier av decoders.
	 */
	if (!state->is_cx23885) {
		switch (aud_input) {
		case CX25840_AUDIO_SERIAL:
			/* do nothing, use serial audio input */
			break;
		case CX25840_AUDIO4: reg &= ~0x30; break;
		case CX25840_AUDIO5: reg &= ~0x30; reg |= 0x10; break;
		case CX25840_AUDIO6: reg &= ~0x30; reg |= 0x20; break;
		case CX25840_AUDIO7: reg &= ~0xc0; break;
		case CX25840_AUDIO8: reg &= ~0xc0; reg |= 0x40; break;

		default:
			v4l_err(client, "0x%04x is not a valid audio input!\n",
				aud_input);
			return -EINVAL;
		}
	}

	cx25840_write(client, 0x103, reg);

	/* Set INPUT_MODE to Composite (0) or S-Video (1) */
	cx25840_and_or(client, 0x401, ~0x6, is_composite ? 0 : 0x02);

	if (!state->is_cx23885) {
		/* Set CH_SEL_ADC2 to 1 if input comes from CH3 */
		cx25840_and_or(client, 0x102, ~0x2, (reg & 0x80) == 0 ? 2 : 0);
		/* Set DUAL_MODE_ADC2 to 1 if input comes from both CH2&CH3 */
		if ((reg & 0xc0) != 0xc0 && (reg & 0x30) != 0x30)
			cx25840_and_or(client, 0x102, ~0x4, 4);
		else
			cx25840_and_or(client, 0x102, ~0x4, 0);
	} else {
		if (is_composite)
			/* ADC2 input select channel 2 */
			cx25840_and_or(client, 0x102, ~0x2, 0);
		else
			/* ADC2 input select channel 3 */
			cx25840_and_or(client, 0x102, ~0x2, 2);
	}

	state->vid_input = vid_input;
	state->aud_input = aud_input;
	if (!state->is_cx25836) {
		cx25840_audio_set_path(client);
		input_change(client);
	}

	if (state->is_cx23885) {
		/* Audio channel 1 src : Parallel 1 */
		cx25840_write(client, 0x124, 0x03);

		/* Select AFE clock pad output source */
		cx25840_write(client, 0x144, 0x05);

		/* I2S_IN_CTL: I2S_IN_SONY_MODE, LEFT SAMPLE on WS=1 */
		cx25840_write(client, 0x914, 0xa0);

		/* I2S_OUT_CTL:
		 * I2S_IN_SONY_MODE, LEFT SAMPLE on WS=1
		 * I2S_OUT_MASTER_MODE = Master
		 */
		cx25840_write(client, 0x918, 0xa0);
		cx25840_write(client, 0x919, 0x01);
	}

	return 0;
}

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

static int set_v4lstd(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	u8 fmt = 0; 	/* zero is autodetect */
	u8 pal_m = 0;

	/* First tests should be against specific std */
	if (state->std == V4L2_STD_NTSC_M_JP) {
		fmt = 0x2;
	} else if (state->std == V4L2_STD_NTSC_443) {
		fmt = 0x3;
	} else if (state->std == V4L2_STD_PAL_M) {
		pal_m = 1;
		fmt = 0x5;
	} else if (state->std == V4L2_STD_PAL_N) {
		fmt = 0x6;
	} else if (state->std == V4L2_STD_PAL_Nc) {
		fmt = 0x7;
	} else if (state->std == V4L2_STD_PAL_60) {
		fmt = 0x8;
	} else {
		/* Then, test against generic ones */
		if (state->std & V4L2_STD_NTSC)
			fmt = 0x1;
		else if (state->std & V4L2_STD_PAL)
			fmt = 0x4;
		else if (state->std & V4L2_STD_SECAM)
			fmt = 0xc;
	}

	v4l_dbg(1, cx25840_debug, client, "changing video std to fmt %i\n",fmt);

	/* Follow step 9 of section 3.16 in the cx25840 datasheet.
	   Without this PAL may display a vertical ghosting effect.
	   This happens for example with the Yuan MPC622. */
	if (fmt >= 4 && fmt < 8) {
		/* Set format to NTSC-M */
		cx25840_and_or(client, 0x400, ~0xf, 1);
		/* Turn off LCOMB */
		cx25840_and_or(client, 0x47b, ~6, 0);
	}
	cx25840_and_or(client, 0x400, ~0xf, fmt);
	cx25840_and_or(client, 0x403, ~0x3, pal_m);
	cx25840_std_setup(client);
	if (!state->is_cx25836)
		input_change(client);
	return 0;
}

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

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:
		if (state->is_cx25836)
			return -EINVAL;
		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:
		if (state->is_cx25836)
			return -EINVAL;
		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 cx25840_state *state = i2c_get_clientdata(client);
	struct v4l2_pix_format *pix;
	int HSC, VSC, Vsrc, Hsrc, filter, Vlines;
	int is_50Hz = !(state->std & V4L2_STD_525_60);

	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_50Hz ? 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 void log_video_status(struct i2c_client *client)
{
	static const char *const fmt_strs[] = {
		"0x0",
		"NTSC-M", "NTSC-J", "NTSC-4.43",
		"PAL-BDGHI", "PAL-M", "PAL-N", "PAL-Nc", "PAL-60",
		"0x9", "0xA", "0xB",
		"SECAM",
		"0xD", "0xE", "0xF"
	};

	struct cx25840_state *state = i2c_get_clientdata(client);
	u8 vidfmt_sel = cx25840_read(client, 0x400) & 0xf;
	u8 gen_stat1 = cx25840_read(client, 0x40d);
	u8 gen_stat2 = cx25840_read(client, 0x40e);
	int vid_input = state->vid_input;

	v4l_info(client, "Video signal:              %spresent\n",
		    (gen_stat2 & 0x20) ? "" : "not ");
	v4l_info(client, "Detected format:           %s\n",
		    fmt_strs[gen_stat1 & 0xf]);

	v4l_info(client, "Specified standard:        %s\n",
		    vidfmt_sel ? fmt_strs[vidfmt_sel] : "automatic detection");

	if (vid_input >= CX25840_COMPOSITE1 &&
	    vid_input <= CX25840_COMPOSITE8) {
		v4l_info(client, "Specified video input:     Composite %d\n",
			vid_input - CX25840_COMPOSITE1 + 1);
	} else {
		v4l_info(client, "Specified video input:     S-Video (Luma In%d, Chroma In%d)\n",
			(vid_input & 0xf0) >> 4, (vid_input & 0xf00) >> 8);
	}

	v4l_info(client, "Specified audioclock freq: %d Hz\n", state->audclk_freq);
}

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

static void log_audio_status(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	u8 download_ctl = cx25840_read(client, 0x803);
	u8 mod_det_stat0 = cx25840_read(client, 0x804);
	u8 mod_det_stat1 = cx25840_read(client, 0x805);
	u8 audio_config = cx25840_read(client, 0x808);
	u8 pref_mode = cx25840_read(client, 0x809);
	u8 afc0 = cx25840_read(client, 0x80b);
	u8 mute_ctl = cx25840_read(client, 0x8d3);
	int aud_input = state->aud_input;
	char *p;

	switch (mod_det_stat0) {
	case 0x00: p = "mono"; break;
	case 0x01: p = "stereo"; break;
	case 0x02: p = "dual"; break;
	case 0x04: p = "tri"; break;
	case 0x10: p = "mono with SAP"; break;
	case 0x11: p = "stereo with SAP"; break;
	case 0x12: p = "dual with SAP"; break;