[net-next-2.6.git] / drivers / media / video / cx18 / cx18-av-audio.c

/*
 *  cx18 ADEC audio functions
 *
 *  Derived from cx25840-audio.c
 *
 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
 *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#include "cx18-driver.h"

static int set_audclk_freq(struct cx18 *cx, u32 freq)
{
	struct cx18_av_state *state = &cx->av_state;

	if (freq != 32000 && freq != 44100 && freq != 48000)
		return -EINVAL;

	/*
	 * The PLL parameters are based on the external crystal frequency that
	 * would ideally be:
	 *
	 * NTSC Color subcarrier freq * 8 =
	 * 	4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
	 *
	 * The accidents of history and rationale that explain from where this
	 * combination of magic numbers originate can be found in:
	 *
	 * [1] Abrahams, I. C., "Choice of Chrominance Subcarrier Frequency in
	 * the NTSC Standards", Proceedings of the I-R-E, January 1954, pp 79-80
	 *
	 * [2] Abrahams, I. C., "The 'Frequency Interleaving' Principle in the
	 * NTSC Standards", Proceedings of the I-R-E, January 1954, pp 81-83
	 *
	 * As Mike Bradley has rightly pointed out, it's not the exact crystal
	 * frequency that matters, only that all parts of the driver and
	 * firmware are using the same value (close to the ideal value).
	 *
	 * Since I have a strong suspicion that, if the firmware ever assumes a
	 * crystal value at all, it will assume 28.636360 MHz, the crystal
	 * freq used in calculations in this driver will be:
	 *
	 *	xtal_freq = 28.636360 MHz
	 *
	 * an error of less than 0.13 ppm which is way, way better than any off
	 * the shelf crystal will have for accuracy anyway.
	 *
	 * Below I aim to run the PLLs' VCOs near 400 MHz to minimze error.
	 *
	 * Many thanks to Jeff Campbell and Mike Bradley for their extensive
	 * investigation, experimentation, testing, and suggested solutions of
	 * of audio/video sync problems with SVideo and CVBS captures.
	 */

	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
		switch (freq) {
		case 32000:
			/*
			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
			 * AUX_PLL Integer = 0x0d, AUX PLL Post Divider = 0x20
			 */
			cx18_av_write4(cx, 0x108, 0x200d040f);

			/* VID_PLL Fraction = 0x2be2fe */
			/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
			cx18_av_write4(cx, 0x10c, 0x002be2fe);

			/* AUX_PLL Fraction = 0x176740c */
			/* xtal * 0xd.bb3a060/0x20 = 32000 * 384: 393 MHz p-pd*/
			cx18_av_write4(cx, 0x110, 0x0176740c);

			/* src3/4/6_ctl */
			/* 0x1.f77f = (4 * xtal/8*2/455) / 32000 */
			cx18_av_write4(cx, 0x900, 0x0801f77f);
			cx18_av_write4(cx, 0x904, 0x0801f77f);
			cx18_av_write4(cx, 0x90c, 0x0801f77f);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x20 */
			cx18_av_write(cx, 0x127, 0x60);

			/* AUD_COUNT = 0x2fff = 8 samples * 4 * 384 - 1 */
			cx18_av_write4(cx, 0x12c, 0x11202fff);

			/*
			 * EN_AV_LOCK = 0
			 * VID_COUNT = 0x0d2ef8 = 107999.000 * 8 =
			 *  ((8 samples/32,000) * (13,500,000 * 8) * 4 - 1) * 8
			 */
			cx18_av_write4(cx, 0x128, 0xa00d2ef8);
			break;

		case 44100:
			/*
			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
			 * AUX_PLL Integer = 0x0e, AUX PLL Post Divider = 0x18
			 */
			cx18_av_write4(cx, 0x108, 0x180e040f);

			/* VID_PLL Fraction = 0x2be2fe */
			/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
			cx18_av_write4(cx, 0x10c, 0x002be2fe);

			/* AUX_PLL Fraction = 0x062a1f2 */
			/* xtal * 0xe.3150f90/0x18 = 44100 * 384: 406 MHz p-pd*/
			cx18_av_write4(cx, 0x110, 0x0062a1f2);

			/* src3/4/6_ctl */
			/* 0x1.6d59 = (4 * xtal/8*2/455) / 44100 */
			cx18_av_write4(cx, 0x900, 0x08016d59);
			cx18_av_write4(cx, 0x904, 0x08016d59);
			cx18_av_write4(cx, 0x90c, 0x08016d59);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x18 */
			cx18_av_write(cx, 0x127, 0x58);

			/* AUD_COUNT = 0x92ff = 49 samples * 2 * 384 - 1 */
			cx18_av_write4(cx, 0x12c, 0x112092ff);

			/*
			 * EN_AV_LOCK = 0
			 * VID_COUNT = 0x1d4bf8 = 239999.000 * 8 =
			 *  ((49 samples/44,100) * (13,500,000 * 8) * 2 - 1) * 8
			 */
			cx18_av_write4(cx, 0x128, 0xa01d4bf8);
			break;

		case 48000:
			/*
			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
			 * AUX_PLL Integer = 0x0e, AUX PLL Post Divider = 0x16
			 */
			cx18_av_write4(cx, 0x108, 0x160e040f);

			/* VID_PLL Fraction = 0x2be2fe */
			/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
			cx18_av_write4(cx, 0x10c, 0x002be2fe);

			/* AUX_PLL Fraction = 0x05227ad */
			/* xtal * 0xe.2913d68/0x16 = 48000 * 384: 406 MHz p-pd*/
			cx18_av_write4(cx, 0x110, 0x005227ad);

			/* src3/4/6_ctl */
			/* 0x1.4faa = (4 * xtal/8*2/455) / 48000 */
			cx18_av_write4(cx, 0x900, 0x08014faa);
			cx18_av_write4(cx, 0x904, 0x08014faa);
			cx18_av_write4(cx, 0x90c, 0x08014faa);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x16 */
			cx18_av_write(cx, 0x127, 0x56);

			/* AUD_COUNT = 0x5fff = 4 samples * 16 * 384 - 1 */
			cx18_av_write4(cx, 0x12c, 0x11205fff);

			/*
			 * EN_AV_LOCK = 0
			 * VID_COUNT = 0x1193f8 = 143999.000 * 8 =
			 *  ((4 samples/48,000) * (13,500,000 * 8) * 16 - 1) * 8
			 */
			cx18_av_write4(cx, 0x128, 0xa01193f8);
			break;
		}
	} else {
		switch (freq) {
		case 32000:
			/*
			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
			 * AUX_PLL Integer = 0x0d, AUX PLL Post Divider = 0x30
			 */
			cx18_av_write4(cx, 0x108, 0x300d040f);

			/* VID_PLL Fraction = 0x2be2fe */
			/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
			cx18_av_write4(cx, 0x10c, 0x002be2fe);

			/* AUX_PLL Fraction = 0x176740c */
			/* xtal * 0xd.bb3a060/0x30 = 32000 * 256: 393 MHz p-pd*/
			cx18_av_write4(cx, 0x110, 0x0176740c);

			/* src1_ctl */
			/* 0x1.0000 = 32000/32000 */
			cx18_av_write4(cx, 0x8f8, 0x08010000);

			/* src3/4/6_ctl */
			/* 0x2.0000 = 2 * (32000/32000) */
			cx18_av_write4(cx, 0x900, 0x08020000);
			cx18_av_write4(cx, 0x904, 0x08020000);
			cx18_av_write4(cx, 0x90c, 0x08020000);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x30 */
			cx18_av_write(cx, 0x127, 0x70);

			/* AUD_COUNT = 0x1fff = 8 samples * 4 * 256 - 1 */
			cx18_av_write4(cx, 0x12c, 0x11201fff);

			/*
			 * EN_AV_LOCK = 0
			 * VID_COUNT = 0x0d2ef8 = 107999.000 * 8 =
			 *  ((8 samples/32,000) * (13,500,000 * 8) * 4 - 1) * 8
			 */
			cx18_av_write4(cx, 0x128, 0xa00d2ef8);
			break;

		case 44100:
			/*
			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
			 * AUX_PLL Integer = 0x0e, AUX PLL Post Divider = 0x24
			 */
			cx18_av_write4(cx, 0x108, 0x240e040f);

			/* VID_PLL Fraction = 0x2be2fe */
			/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
			cx18_av_write4(cx, 0x10c, 0x002be2fe);

			/* AUX_PLL Fraction = 0x062a1f2 */
			/* xtal * 0xe.3150f90/0x24 = 44100 * 256: 406 MHz p-pd*/
			cx18_av_write4(cx, 0x110, 0x0062a1f2);

			/* src1_ctl */
			/* 0x1.60cd = 44100/32000 */
			cx18_av_write4(cx, 0x8f8, 0x080160cd);

			/* src3/4/6_ctl */
			/* 0x1.7385 = 2 * (32000/44100) */
			cx18_av_write4(cx, 0x900, 0x08017385);
			cx18_av_write4(cx, 0x904, 0x08017385);
			cx18_av_write4(cx, 0x90c, 0x08017385);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x24 */
			cx18_av_write(cx, 0x127, 0x64);

			/* AUD_COUNT = 0x61ff = 49 samples * 2 * 256 - 1 */
			cx18_av_write4(cx, 0x12c, 0x112061ff);

			/*
			 * EN_AV_LOCK = 0
			 * VID_COUNT = 0x1d4bf8 = 239999.000 * 8 =
			 *  ((49 samples/44,100) * (13,500,000 * 8) * 2 - 1) * 8
			 */
			cx18_av_write4(cx, 0x128, 0xa01d4bf8);
			break;

		case 48000:
			/*
			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
			 * AUX_PLL Integer = 0x0d, AUX PLL Post Divider = 0x20
			 */
			cx18_av_write4(cx, 0x108, 0x200d040f);

			/* VID_PLL Fraction = 0x2be2fe */
			/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
			cx18_av_write4(cx, 0x10c, 0x002be2fe);

			/* AUX_PLL Fraction = 0x176740c */
			/* xtal * 0xd.bb3a060/0x20 = 48000 * 256: 393 MHz p-pd*/
			cx18_av_write4(cx, 0x110, 0x0176740c);

			/* src1_ctl */
			/* 0x1.8000 = 48000/32000 */
			cx18_av_write4(cx, 0x8f8, 0x08018000);

			/* src3/4/6_ctl */
			/* 0x1.5555 = 2 * (32000/48000) */
			cx18_av_write4(cx, 0x900, 0x08015555);
			cx18_av_write4(cx, 0x904, 0x08015555);
			cx18_av_write4(cx, 0x90c, 0x08015555);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x20 */
			cx18_av_write(cx, 0x127, 0x60);

			/* AUD_COUNT = 0x3fff = 4 samples * 16 * 256 - 1 */
			cx18_av_write4(cx, 0x12c, 0x11203fff);

			/*
			 * EN_AV_LOCK = 0
			 * VID_COUNT = 0x1193f8 = 143999.000 * 8 =
			 *  ((4 samples/48,000) * (13,500,000 * 8) * 16 - 1) * 8
			 */
			cx18_av_write4(cx, 0x128, 0xa01193f8);
			break;
		}
	}

	state->audclk_freq = freq;

	return 0;
}

void cx18_av_audio_set_path(struct cx18 *cx)
{
	struct cx18_av_state *state = &cx->av_state;
	u8 v;

	/* stop microcontroller */
	v = cx18_av_read(cx, 0x803) & ~0x10;
	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);

	/* assert soft reset */
	v = cx18_av_read(cx, 0x810) | 0x01;
	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);

	/* Mute everything to prevent the PFFT! */
	cx18_av_write(cx, 0x8d3, 0x1f);

	if (state->aud_input <= CX18_AV_AUDIO_SERIAL2) {
		/* Set Path1 to Serial Audio Input */
		cx18_av_write4(cx, 0x8d0, 0x01011012);

		/* The microcontroller should not be started for the
		 * non-tuner inputs: autodetection is specific for
		 * TV audio. */
	} else {
		/* Set Path1 to Analog Demod Main Channel */
		cx18_av_write4(cx, 0x8d0, 0x1f063870);
	}

	set_audclk_freq(cx, state->audclk_freq);

	/* deassert soft reset */
	v = cx18_av_read(cx, 0x810) & ~0x01;
	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);

	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
		/* When the microcontroller detects the
		 * audio format, it will unmute the lines */
		v = cx18_av_read(cx, 0x803) | 0x10;
		cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
	}
}

static int get_volume(struct cx18 *cx)
{
	/* Volume runs +18dB to -96dB in 1/2dB steps
	 * change to fit the msp3400 -114dB to +12dB range */

	/* check PATH1_VOLUME */
	int vol = 228 - cx18_av_read(cx, 0x8d4);
	vol = (vol / 2) + 23;
	return vol << 9;
}

static void set_volume(struct cx18 *cx, int volume)
{
	/* First convert the volume to msp3400 values (0-127) */
	int vol = volume >> 9;
	/* now scale it up to cx18_av values
	 * -114dB to -96dB maps to 0
	 * this should be 19, but in my testing that was 4dB too loud */
	if (vol <= 23)
		vol = 0;
	else
		vol -= 23;

	/* PATH1_VOLUME */
	cx18_av_write(cx, 0x8d4, 228 - (vol * 2));
}

static int get_bass(struct cx18 *cx)
{
	/* bass is 49 steps +12dB to -12dB */

	/* check PATH1_EQ_BASS_VOL */
	int bass = cx18_av_read(cx, 0x8d9) & 0x3f;
	bass = (((48 - bass) * 0xffff) + 47) / 48;
	return bass;
}

static void set_bass(struct cx18 *cx, int bass)
{
	/* PATH1_EQ_BASS_VOL */
	cx18_av_and_or(cx, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
}

static int get_treble(struct cx18 *cx)
{
	/* treble is 49 steps +12dB to -12dB */

	/* check PATH1_EQ_TREBLE_VOL */
	int treble = cx18_av_read(cx, 0x8db) & 0x3f;
	treble = (((48 - treble) * 0xffff) + 47) / 48;
	return treble;
}

static void set_treble(struct cx18 *cx, int treble)
{
	/* PATH1_EQ_TREBLE_VOL */
	cx18_av_and_or(cx, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
}

static int get_balance(struct cx18 *cx)
{
	/* balance is 7 bit, 0 to -96dB */

	/* check PATH1_BAL_LEVEL */
	int balance = cx18_av_read(cx, 0x8d5) & 0x7f;
	/* check PATH1_BAL_LEFT */
	if ((cx18_av_read(cx, 0x8d5) & 0x80) == 0)
		balance = 0x80 - balance;
	else
		balance = 0x80 + balance;
	return balance << 8;
}

static void set_balance(struct cx18 *cx, int balance)
{
	int bal = balance >> 8;
	if (bal > 0x80) {
		/* PATH1_BAL_LEFT */
		cx18_av_and_or(cx, 0x8d5, 0x7f, 0x80);
		/* PATH1_BAL_LEVEL */
		cx18_av_and_or(cx, 0x8d5, ~0x7f, bal & 0x7f);
	} else {
		/* PATH1_BAL_LEFT */
		cx18_av_and_or(cx, 0x8d5, 0x7f, 0x00);
		/* PATH1_BAL_LEVEL */
		cx18_av_and_or(cx, 0x8d5, ~0x7f, 0x80 - bal);
	}
}

static int get_mute(struct cx18 *cx)
{
	/* check SRC1_MUTE_EN */
	return cx18_av_read(cx, 0x8d3) & 0x2 ? 1 : 0;
}

static void set_mute(struct cx18 *cx, int mute)
{
	struct cx18_av_state *state = &cx->av_state;
	u8 v;

	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
		/* Must turn off microcontroller in order to mute sound.
		 * Not sure if this is the best method, but it does work.
		 * If the microcontroller is running, then it will undo any
		 * changes to the mute register. */
		v = cx18_av_read(cx, 0x803);
		if (mute) {
			/* disable microcontroller */
			v &= ~0x10;
			cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
			cx18_av_write(cx, 0x8d3, 0x1f);
		} else {
			/* enable microcontroller */
			v |= 0x10;
			cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
		}
	} else {
		/* SRC1_MUTE_EN */
		cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
	}
}

int cx18_av_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
{
	struct cx18 *cx = v4l2_get_subdevdata(sd);
	struct cx18_av_state *state = &cx->av_state;
	int retval;
	u8 v;

	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
		v = cx18_av_read(cx, 0x803) & ~0x10;
		cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
		cx18_av_write(cx, 0x8d3, 0x1f);
	}
	v = cx18_av_read(cx, 0x810) | 0x1;
	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);

	retval = set_audclk_freq(cx, freq);

	v = cx18_av_read(cx, 0x810) & ~0x1;
	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);
	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
		v = cx18_av_read(cx, 0x803) | 0x10;
		cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
	}
	return retval;
}

int cx18_av_audio_g_ctrl(struct cx18 *cx, struct v4l2_control *ctrl)
{
	switch (ctrl->id) {
	case V4L2_CID_AUDIO_VOLUME:
		ctrl->value = get_volume(cx);
		break;
	case V4L2_CID_AUDIO_BASS:
		ctrl->value = get_bass(cx);
		break;
	case V4L2_CID_AUDIO_TREBLE:
		ctrl->value = get_treble(cx);
		break;
	case V4L2_CID_AUDIO_BALANCE:
		ctrl->value = get_balance(cx);
		break;
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value = get_mute(cx);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

int cx18_av_audio_s_ctrl(struct cx18 *cx, struct v4l2_control *ctrl)
{
	switch (ctrl->id) {
	case V4L2_CID_AUDIO_VOLUME:
		set_volume(cx, ctrl->value);
		break;
	case V4L2_CID_AUDIO_BASS:
		set_bass(cx, ctrl->value);
		break;
	case V4L2_CID_AUDIO_TREBLE:
		set_treble(cx, ctrl->value);
		break;
	case V4L2_CID_AUDIO_BALANCE:
		set_balance(cx, ctrl->value);
		break;
	case V4L2_CID_AUDIO_MUTE:
		set_mute(cx, ctrl->value);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}
Commit	Line	Data
1c1e45d1 HV	1	/*
	2	* cx18 ADEC audio functions
	3	*
	4	* Derived from cx25840-audio.c
	5	*
	6	* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
6afdeaf8	7	* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
1c1e45d1 HV	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* as published by the Free Software Foundation; either version 2
	12	* of the License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	22	* 02110-1301, USA.
	23	*/
	24
	25	#include "cx18-driver.h"
	26
	27	static int set_audclk_freq(struct cx18 *cx, u32 freq)
	28	{
	29	struct cx18_av_state *state = &cx->av_state;
	30
	31	if (freq != 32000 && freq != 44100 && freq != 48000)
	32	return -EINVAL;
	33
55d81aa5 AW	34	/*
	35	* The PLL parameters are based on the external crystal frequency that
	36	* would ideally be:
	37	*
	38	* NTSC Color subcarrier freq * 8 =
	39	* 4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
	40	*
	41	* The accidents of history and rationale that explain from where this
	42	* combination of magic numbers originate can be found in:
	43	*
	44	* [1] Abrahams, I. C., "Choice of Chrominance Subcarrier Frequency in
	45	* the NTSC Standards", Proceedings of the I-R-E, January 1954, pp 79-80
	46	*
	47	* [2] Abrahams, I. C., "The 'Frequency Interleaving' Principle in the
	48	* NTSC Standards", Proceedings of the I-R-E, January 1954, pp 81-83
	49	*
	50	* As Mike Bradley has rightly pointed out, it's not the exact crystal
	51	* frequency that matters, only that all parts of the driver and
	52	* firmware are using the same value (close to the ideal value).
	53	*
	54	* Since I have a strong suspicion that, if the firmware ever assumes a
	55	* crystal value at all, it will assume 28.636360 MHz, the crystal
	56	* freq used in calculations in this driver will be:
	57	*
	58	* xtal_freq = 28.636360 MHz
	59	*
	60	* an error of less than 0.13 ppm which is way, way better than any off
	61	* the shelf crystal will have for accuracy anyway.
	62	*
	63	* Below I aim to run the PLLs' VCOs near 400 MHz to minimze error.
	64	*
	65	* Many thanks to Jeff Campbell and Mike Bradley for their extensive
	66	* investigation, experimentation, testing, and suggested solutions of
	67	* of audio/video sync problems with SVideo and CVBS captures.
	68	*/
1c1e45d1	69
81cb727d	70	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
1c1e45d1 HV	71	switch (freq) {
1c1e45d1 HV	72	case 32000:
55d81aa5 AW	73	/*
	74	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	75	* AUX_PLL Integer = 0x0d, AUX PLL Post Divider = 0x20
	76	*/
	77	cx18_av_write4(cx, 0x108, 0x200d040f);
	78
	79	/* VID_PLL Fraction = 0x2be2fe */
	80	/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
	81	cx18_av_write4(cx, 0x10c, 0x002be2fe);
1c1e45d1	82
55d81aa5 AW	83	/* AUX_PLL Fraction = 0x176740c */
	84	/* xtal * 0xd.bb3a060/0x20 = 32000 * 384: 393 MHz p-pd*/
	85	cx18_av_write4(cx, 0x110, 0x0176740c);
1c1e45d1	86
f8f6296a	87	/* src3/4/6_ctl */
55d81aa5	88	/* 0x1.f77f = (4 * xtal/82/455) / 32000 /
1c1e45d1 HV	89	cx18_av_write4(cx, 0x900, 0x0801f77f);
	90	cx18_av_write4(cx, 0x904, 0x0801f77f);
	91	cx18_av_write4(cx, 0x90c, 0x0801f77f);
f8f6296a	92
55d81aa5 AW	93	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x20 */
55d81aa5 AW	94	cx18_av_write(cx, 0x127, 0x60);
35f92b2a AW	95
	96	/* AUD_COUNT = 0x2fff = 8 samples * 4 * 384 - 1 */
	97	cx18_av_write4(cx, 0x12c, 0x11202fff);
	98
	99	/*
57e24b62	100	* EN_AV_LOCK = 0
35f92b2a AW	101	* VID_COUNT = 0x0d2ef8 = 107999.000 * 8 =
	102	* ((8 samples/32,000) * (13,500,000 * 8) * 4 - 1) * 8
	103	*/
57e24b62	104	cx18_av_write4(cx, 0x128, 0xa00d2ef8);
1c1e45d1 HV	105	break;
	106
	107	case 44100:
55d81aa5 AW	108	/*
	109	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	110	* AUX_PLL Integer = 0x0e, AUX PLL Post Divider = 0x18
	111	*/
	112	cx18_av_write4(cx, 0x108, 0x180e040f);
	113
	114	/* VID_PLL Fraction = 0x2be2fe */
	115	/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
	116	cx18_av_write4(cx, 0x10c, 0x002be2fe);
1c1e45d1	117
55d81aa5 AW	118	/* AUX_PLL Fraction = 0x062a1f2 */
	119	/* xtal * 0xe.3150f90/0x18 = 44100 * 384: 406 MHz p-pd*/
	120	cx18_av_write4(cx, 0x110, 0x0062a1f2);
1c1e45d1	121
f8f6296a	122	/* src3/4/6_ctl */
55d81aa5	123	/* 0x1.6d59 = (4 * xtal/82/455) / 44100 /
1c1e45d1 HV	124	cx18_av_write4(cx, 0x900, 0x08016d59);
	125	cx18_av_write4(cx, 0x904, 0x08016d59);
	126	cx18_av_write4(cx, 0x90c, 0x08016d59);
35f92b2a	127
55d81aa5 AW	128	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x18 */
	129	cx18_av_write(cx, 0x127, 0x58);
	130
35f92b2a AW	131	/* AUD_COUNT = 0x92ff = 49 samples * 2 * 384 - 1 */
	132	cx18_av_write4(cx, 0x12c, 0x112092ff);
	133
	134	/*
57e24b62	135	* EN_AV_LOCK = 0
35f92b2a AW	136	* VID_COUNT = 0x1d4bf8 = 239999.000 * 8 =
	137	* ((49 samples/44,100) * (13,500,000 * 8) * 2 - 1) * 8
	138	*/
57e24b62	139	cx18_av_write4(cx, 0x128, 0xa01d4bf8);
1c1e45d1 HV	140	break;
	141
	142	case 48000:
55d81aa5 AW	143	/*
	144	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	145	* AUX_PLL Integer = 0x0e, AUX PLL Post Divider = 0x16
	146	*/
	147	cx18_av_write4(cx, 0x108, 0x160e040f);
1c1e45d1	148
55d81aa5 AW	149	/* VID_PLL Fraction = 0x2be2fe */
	150	/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
	151	cx18_av_write4(cx, 0x10c, 0x002be2fe);
	152
	153	/* AUX_PLL Fraction = 0x05227ad */
	154	/* xtal * 0xe.2913d68/0x16 = 48000 * 384: 406 MHz p-pd*/
	155	cx18_av_write4(cx, 0x110, 0x005227ad);
1c1e45d1	156
f8f6296a	157	/* src3/4/6_ctl */
55d81aa5	158	/* 0x1.4faa = (4 * xtal/82/455) / 48000 /
1c1e45d1 HV	159	cx18_av_write4(cx, 0x900, 0x08014faa);
	160	cx18_av_write4(cx, 0x904, 0x08014faa);
	161	cx18_av_write4(cx, 0x90c, 0x08014faa);
35f92b2a	162
55d81aa5 AW	163	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x16 */
	164	cx18_av_write(cx, 0x127, 0x56);
	165
35f92b2a AW	166	/* AUD_COUNT = 0x5fff = 4 samples * 16 * 384 - 1 */
	167	cx18_av_write4(cx, 0x12c, 0x11205fff);
	168
	169	/*
57e24b62	170	* EN_AV_LOCK = 0
35f92b2a AW	171	* VID_COUNT = 0x1193f8 = 143999.000 * 8 =
	172	* ((4 samples/48,000) * (13,500,000 * 8) * 16 - 1) * 8
	173	*/
57e24b62	174	cx18_av_write4(cx, 0x128, 0xa01193f8);
1c1e45d1 HV	175	break;
	176	}
	177	} else {
	178	switch (freq) {
	179	case 32000:
55d81aa5 AW	180	/*
	181	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	182	* AUX_PLL Integer = 0x0d, AUX PLL Post Divider = 0x30
	183	*/
	184	cx18_av_write4(cx, 0x108, 0x300d040f);
	185
	186	/* VID_PLL Fraction = 0x2be2fe */
	187	/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
	188	cx18_av_write4(cx, 0x10c, 0x002be2fe);
1c1e45d1	189
55d81aa5 AW	190	/* AUX_PLL Fraction = 0x176740c */
	191	/* xtal * 0xd.bb3a060/0x30 = 32000 * 256: 393 MHz p-pd*/
	192	cx18_av_write4(cx, 0x110, 0x0176740c);
1c1e45d1	193
f8f6296a AW	194	/* src1_ctl */
f8f6296a AW	195	/* 0x1.0000 = 32000/32000 */
1c1e45d1 HV	196	cx18_av_write4(cx, 0x8f8, 0x08010000);
1c1e45d1 HV	197
f8f6296a AW	198	/* src3/4/6_ctl */
f8f6296a AW	199	/* 0x2.0000 = 2 * (32000/32000) */
1c1e45d1 HV	200	cx18_av_write4(cx, 0x900, 0x08020000);
	201	cx18_av_write4(cx, 0x904, 0x08020000);
	202	cx18_av_write4(cx, 0x90c, 0x08020000);
	203
55d81aa5 AW	204	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x30 */
55d81aa5 AW	205	cx18_av_write(cx, 0x127, 0x70);
35f92b2a AW	206
	207	/* AUD_COUNT = 0x1fff = 8 samples * 4 * 256 - 1 */
	208	cx18_av_write4(cx, 0x12c, 0x11201fff);
	209
	210	/*
57e24b62	211	* EN_AV_LOCK = 0
35f92b2a AW	212	* VID_COUNT = 0x0d2ef8 = 107999.000 * 8 =
	213	* ((8 samples/32,000) * (13,500,000 * 8) * 4 - 1) * 8
	214	*/
57e24b62	215	cx18_av_write4(cx, 0x128, 0xa00d2ef8);
1c1e45d1 HV	216	break;
	217
	218	case 44100:
55d81aa5 AW	219	/*
	220	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	221	* AUX_PLL Integer = 0x0e, AUX PLL Post Divider = 0x24
	222	*/
	223	cx18_av_write4(cx, 0x108, 0x240e040f);
	224
	225	/* VID_PLL Fraction = 0x2be2fe */
	226	/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
	227	cx18_av_write4(cx, 0x10c, 0x002be2fe);
1c1e45d1	228
55d81aa5 AW	229	/* AUX_PLL Fraction = 0x062a1f2 */
	230	/* xtal * 0xe.3150f90/0x24 = 44100 * 256: 406 MHz p-pd*/
	231	cx18_av_write4(cx, 0x110, 0x0062a1f2);
1c1e45d1	232
f8f6296a AW	233	/* src1_ctl */
f8f6296a AW	234	/* 0x1.60cd = 44100/32000 */
1c1e45d1 HV	235	cx18_av_write4(cx, 0x8f8, 0x080160cd);
1c1e45d1 HV	236
f8f6296a AW	237	/* src3/4/6_ctl */
f8f6296a AW	238	/* 0x1.7385 = 2 * (32000/44100) */
1c1e45d1 HV	239	cx18_av_write4(cx, 0x900, 0x08017385);
	240	cx18_av_write4(cx, 0x904, 0x08017385);
	241	cx18_av_write4(cx, 0x90c, 0x08017385);
35f92b2a	242
55d81aa5 AW	243	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x24 */
	244	cx18_av_write(cx, 0x127, 0x64);
	245
35f92b2a AW	246	/* AUD_COUNT = 0x61ff = 49 samples * 2 * 256 - 1 */
	247	cx18_av_write4(cx, 0x12c, 0x112061ff);
	248
	249	/*
57e24b62	250	* EN_AV_LOCK = 0
35f92b2a AW	251	* VID_COUNT = 0x1d4bf8 = 239999.000 * 8 =
	252	* ((49 samples/44,100) * (13,500,000 * 8) * 2 - 1) * 8
	253	*/
57e24b62	254	cx18_av_write4(cx, 0x128, 0xa01d4bf8);
1c1e45d1 HV	255	break;
	256
	257	case 48000:
55d81aa5 AW	258	/*
	259	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	260	* AUX_PLL Integer = 0x0d, AUX PLL Post Divider = 0x20
	261	*/
	262	cx18_av_write4(cx, 0x108, 0x200d040f);
1c1e45d1	263
55d81aa5 AW	264	/* VID_PLL Fraction = 0x2be2fe */
	265	/* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz pre-postdiv*/
	266	cx18_av_write4(cx, 0x10c, 0x002be2fe);
	267
	268	/* AUX_PLL Fraction = 0x176740c */
	269	/* xtal * 0xd.bb3a060/0x20 = 48000 * 256: 393 MHz p-pd*/
	270	cx18_av_write4(cx, 0x110, 0x0176740c);
1c1e45d1	271
f8f6296a AW	272	/* src1_ctl */
f8f6296a AW	273	/* 0x1.8000 = 48000/32000 */
1c1e45d1 HV	274	cx18_av_write4(cx, 0x8f8, 0x08018000);
1c1e45d1 HV	275
f8f6296a AW	276	/* src3/4/6_ctl */
f8f6296a AW	277	/* 0x1.5555 = 2 * (32000/48000) */
1c1e45d1 HV	278	cx18_av_write4(cx, 0x900, 0x08015555);
	279	cx18_av_write4(cx, 0x904, 0x08015555);
	280	cx18_av_write4(cx, 0x90c, 0x08015555);
35f92b2a	281
55d81aa5 AW	282	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x20 */
	283	cx18_av_write(cx, 0x127, 0x60);
	284
35f92b2a AW	285	/* AUD_COUNT = 0x3fff = 4 samples * 16 * 256 - 1 */
	286	cx18_av_write4(cx, 0x12c, 0x11203fff);
	287
	288	/*
57e24b62	289	* EN_AV_LOCK = 0
35f92b2a AW	290	* VID_COUNT = 0x1193f8 = 143999.000 * 8 =
	291	* ((4 samples/48,000) * (13,500,000 * 8) * 16 - 1) * 8
	292	*/
57e24b62	293	cx18_av_write4(cx, 0x128, 0xa01193f8);
1c1e45d1 HV	294	break;
	295	}
	296	}
	297
	298	state->audclk_freq = freq;
	299
	300	return 0;
	301	}
	302
	303	void cx18_av_audio_set_path(struct cx18 *cx)
	304	{
	305	struct cx18_av_state *state = &cx->av_state;
ced07371	306	u8 v;
1c1e45d1 HV	307
1c1e45d1 HV	308	/* stop microcontroller */
ced07371 AW	309	v = cx18_av_read(cx, 0x803) & ~0x10;
ced07371 AW	310	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
1c1e45d1 HV	311
1c1e45d1 HV	312	/* assert soft reset */
ced07371 AW	313	v = cx18_av_read(cx, 0x810) \| 0x01;
ced07371 AW	314	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);
1c1e45d1 HV	315
	316	/* Mute everything to prevent the PFFT! */
	317	cx18_av_write(cx, 0x8d3, 0x1f);
	318
81cb727d	319	if (state->aud_input <= CX18_AV_AUDIO_SERIAL2) {
1c1e45d1 HV	320	/* Set Path1 to Serial Audio Input */
	321	cx18_av_write4(cx, 0x8d0, 0x01011012);
	322
	323	/* The microcontroller should not be started for the
	324	* non-tuner inputs: autodetection is specific for
	325	* TV audio. */
	326	} else {
	327	/* Set Path1 to Analog Demod Main Channel */
	328	cx18_av_write4(cx, 0x8d0, 0x1f063870);
	329	}
	330
	331	set_audclk_freq(cx, state->audclk_freq);
	332
	333	/* deassert soft reset */
ced07371 AW	334	v = cx18_av_read(cx, 0x810) & ~0x01;
ced07371 AW	335	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);
1c1e45d1	336
81cb727d	337	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
1c1e45d1 HV	338	/* When the microcontroller detects the
1c1e45d1 HV	339	* audio format, it will unmute the lines */
ced07371 AW	340	v = cx18_av_read(cx, 0x803) \| 0x10;
ced07371 AW	341	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
1c1e45d1 HV	342	}
	343	}
	344
	345	static int get_volume(struct cx18 *cx)
	346	{
	347	/* Volume runs +18dB to -96dB in 1/2dB steps
	348	* change to fit the msp3400 -114dB to +12dB range */
	349
	350	/* check PATH1_VOLUME */
	351	int vol = 228 - cx18_av_read(cx, 0x8d4);
	352	vol = (vol / 2) + 23;
	353	return vol << 9;
	354	}
	355
	356	static void set_volume(struct cx18 *cx, int volume)
	357	{
	358	/* First convert the volume to msp3400 values (0-127) */
	359	int vol = volume >> 9;
	360	/* now scale it up to cx18_av values
	361	* -114dB to -96dB maps to 0
	362	* this should be 19, but in my testing that was 4dB too loud */
	363	if (vol <= 23)
	364	vol = 0;
	365	else
	366	vol -= 23;
	367
	368	/* PATH1_VOLUME */
	369	cx18_av_write(cx, 0x8d4, 228 - (vol * 2));
	370	}
	371
	372	static int get_bass(struct cx18 *cx)
	373	{
	374	/* bass is 49 steps +12dB to -12dB */
	375
	376	/* check PATH1_EQ_BASS_VOL */
	377	int bass = cx18_av_read(cx, 0x8d9) & 0x3f;
	378	bass = (((48 - bass) * 0xffff) + 47) / 48;
	379	return bass;
	380	}
	381
	382	static void set_bass(struct cx18 *cx, int bass)
	383	{
	384	/* PATH1_EQ_BASS_VOL */
	385	cx18_av_and_or(cx, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
	386	}
	387
	388	static int get_treble(struct cx18 *cx)
	389	{
	390	/* treble is 49 steps +12dB to -12dB */
	391
	392	/* check PATH1_EQ_TREBLE_VOL */
	393	int treble = cx18_av_read(cx, 0x8db) & 0x3f;
	394	treble = (((48 - treble) * 0xffff) + 47) / 48;
	395	return treble;
	396	}
	397
	398	static void set_treble(struct cx18 *cx, int treble)
	399	{
	400	/* PATH1_EQ_TREBLE_VOL */
	401	cx18_av_and_or(cx, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
	402	}
	403
	404	static int get_balance(struct cx18 *cx)
	405	{
406	/* balance is 7 bit, 0 to -96dB */
407
408	/* check PATH1_BAL_LEVEL */
409	int balance = cx18_av_read(cx, 0x8d5) & 0x7f;
410	/* check PATH1_BAL_LEFT */
411	if ((cx18_av_read(cx, 0x8d5) & 0x80) == 0)
412	balance = 0x80 - balance;
413	else
414	balance = 0x80 + balance;
415	return balance << 8;
416	}
417
418	static void set_balance(struct cx18 *cx, int balance)
419	{
420	int bal = balance >> 8;
421	if (bal > 0x80) {
422	/* PATH1_BAL_LEFT */
423	cx18_av_and_or(cx, 0x8d5, 0x7f, 0x80);
424	/* PATH1_BAL_LEVEL */
425	cx18_av_and_or(cx, 0x8d5, ~0x7f, bal & 0x7f);
426	} else {
427	/* PATH1_BAL_LEFT */
428	cx18_av_and_or(cx, 0x8d5, 0x7f, 0x00);
429	/* PATH1_BAL_LEVEL */
430	cx18_av_and_or(cx, 0x8d5, ~0x7f, 0x80 - bal);
431	}
432	}
433
434	static int get_mute(struct cx18 *cx)
435	{
436	/* check SRC1_MUTE_EN */
437	return cx18_av_read(cx, 0x8d3) & 0x2 ? 1 : 0;
438	}
439
440	static void set_mute(struct cx18 *cx, int mute)
441	{
442	struct cx18_av_state *state = &cx->av_state;
ced07371	443	u8 v;
1c1e45d1	444
81cb727d	445	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
1c1e45d1 HV	446	/* Must turn off microcontroller in order to mute sound.
	447	* Not sure if this is the best method, but it does work.
	448	* If the microcontroller is running, then it will undo any
	449	* changes to the mute register. */
ced07371	450	v = cx18_av_read(cx, 0x803);
1c1e45d1 HV	451	if (mute) {
1c1e45d1 HV	452	/* disable microcontroller */
ced07371 AW	453	v &= ~0x10;
ced07371 AW	454	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
1c1e45d1 HV	455	cx18_av_write(cx, 0x8d3, 0x1f);
	456	} else {
	457	/* enable microcontroller */
ced07371 AW	458	v \|= 0x10;
ced07371 AW	459	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
1c1e45d1 HV	460	}
	461	} else {
	462	/* SRC1_MUTE_EN */
	463	cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
	464	}
	465	}
	466
41c129a8	467	int cx18_av_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
1c1e45d1	468	{
41c129a8	469	struct cx18 *cx = v4l2_get_subdevdata(sd);
1c1e45d1	470	struct cx18_av_state *state = &cx->av_state;
1c1e45d1	471	int retval;
41c129a8	472	u8 v;
1c1e45d1	473
41c129a8 HV	474	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
	475	v = cx18_av_read(cx, 0x803) & ~0x10;
	476	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
	477	cx18_av_write(cx, 0x8d3, 0x1f);
	478	}
	479	v = cx18_av_read(cx, 0x810) \| 0x1;
	480	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);
ced07371	481
41c129a8	482	retval = set_audclk_freq(cx, freq);
ced07371	483
41c129a8 HV	484	v = cx18_av_read(cx, 0x810) & ~0x1;
	485	cx18_av_write_expect(cx, 0x810, v, v, 0x0f);
	486	if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
	487	v = cx18_av_read(cx, 0x803) \| 0x10;
	488	cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
ced07371	489	}
41c129a8 HV	490	return retval;
41c129a8 HV	491	}
1c1e45d1	492
41c129a8 HV	493	int cx18_av_audio_g_ctrl(struct cx18 cx, struct v4l2_control ctrl)
	494	{
	495	switch (ctrl->id) {
	496	case V4L2_CID_AUDIO_VOLUME:
	497	ctrl->value = get_volume(cx);
1c1e45d1	498	break;
41c129a8 HV	499	case V4L2_CID_AUDIO_BASS:
	500	ctrl->value = get_bass(cx);
	501	break;
	502	case V4L2_CID_AUDIO_TREBLE:
	503	ctrl->value = get_treble(cx);
	504	break;
	505	case V4L2_CID_AUDIO_BALANCE:
	506	ctrl->value = get_balance(cx);
	507	break;
	508	case V4L2_CID_AUDIO_MUTE:
	509	ctrl->value = get_mute(cx);
1c1e45d1	510	break;
1c1e45d1 HV	511	default:
	512	return -EINVAL;
	513	}
41c129a8 HV	514	return 0;
41c129a8 HV	515	}
1c1e45d1	516
41c129a8 HV	517	int cx18_av_audio_s_ctrl(struct cx18 cx, struct v4l2_control ctrl)
	518	{
	519	switch (ctrl->id) {
	520	case V4L2_CID_AUDIO_VOLUME:
	521	set_volume(cx, ctrl->value);
	522	break;
	523	case V4L2_CID_AUDIO_BASS:
	524	set_bass(cx, ctrl->value);
	525	break;
	526	case V4L2_CID_AUDIO_TREBLE:
	527	set_treble(cx, ctrl->value);
	528	break;
	529	case V4L2_CID_AUDIO_BALANCE:
	530	set_balance(cx, ctrl->value);
	531	break;
	532	case V4L2_CID_AUDIO_MUTE:
	533	set_mute(cx, ctrl->value);
	534	break;
	535	default:
	536	return -EINVAL;
	537	}
1c1e45d1 HV	538	return 0;
1c1e45d1 HV	539	}