drivers/media/video/cx25840/cx25840-audio.c - kernel/msm - Gitiles

 /* cx25840 audio functions
  *
  * 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 <linux/videodev2.h>
 #include <linux/i2c.h>
 #include <media/v4l2-common.h>
 #include <media/cx25840.h>

 #include "cx25840-core.h"

 /*
  * Note: The PLL and SRC parameters are based on a reference frequency that
  * would ideally be:
  *
  * NTSC Color subcarrier freq * 8 = 4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
  *
  * However, it's not the exact reference frequency that matters, only that the
  * firmware and modules that comprise the driver for a particular board all
  * use the same value (close to the ideal value).
  *
  * Comments below will note which reference frequency is assumed for various
  * parameters.  They will usually be one of
  *
  *	ref_freq = 28.636360 MHz
  *		or
  *	ref_freq = 28.636363 MHz
  */

 static int cx25840_set_audclk_freq(struct i2c_client *client, u32 freq)
 {
 	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

 	if (state->aud_input != CX25840_AUDIO_SERIAL) {
 		switch (freq) {
 		case 32000:
 			/*
 			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
 			 * AUX_PLL Integer = 0x06, AUX PLL Post Divider = 0x10
 			 */
 			cx25840_write4(client, 0x108, 0x1006040f);

 			/*
 			 * VID_PLL Fraction (register 0x10c) = 0x2be2fe
 			 * 28636360 * 0xf.15f17f0/4 = 108 MHz
 			 * 432 MHz pre-postdivide
 			 */

 			/*
 			 * AUX_PLL Fraction = 0x1bb39ee
 			 * 28636363 * 0x6.dd9cf70/0x10 = 32000 * 384
 			 * 196.6 MHz pre-postdivide
 			 * FIXME < 200 MHz is out of specified valid range
 			 * FIXME 28636363 ref_freq doesn't match VID PLL ref
 			 */
 			cx25840_write4(client, 0x110, 0x01bb39ee);

 			/*
 			 * SA_MCLK_SEL = 1
 			 * SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
 			 */
 			cx25840_write(client, 0x127, 0x50);

 			if (is_cx2583x(state))
 				break;

 			/* src3/4/6_ctl */
 			/* 0x1.f77f = (4 * 28636360/8 * 2/455) / 32000 */
 			cx25840_write4(client, 0x900, 0x0801f77f);
 			cx25840_write4(client, 0x904, 0x0801f77f);
 			cx25840_write4(client, 0x90c, 0x0801f77f);
 			break;

 		case 44100:
 			/*
 			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
 			 * AUX_PLL Integer = 0x09, AUX PLL Post Divider = 0x10
 			 */
 			cx25840_write4(client, 0x108, 0x1009040f);

 			/*
 			 * VID_PLL Fraction (register 0x10c) = 0x2be2fe
 			 * 28636360 * 0xf.15f17f0/4 = 108 MHz
 			 * 432 MHz pre-postdivide
 			 */

 			/*
 			 * AUX_PLL Fraction = 0x0ec6bd6
 			 * 28636363 * 0x9.7635eb0/0x10 = 44100 * 384
 			 * 271 MHz pre-postdivide
 			 * FIXME 28636363 ref_freq doesn't match VID PLL ref
 			 */
 			cx25840_write4(client, 0x110, 0x00ec6bd6);

 			/*
 			 * SA_MCLK_SEL = 1
 			 * SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
 			 */
 			cx25840_write(client, 0x127, 0x50);

 			if (is_cx2583x(state))
 				break;

 			/* src3/4/6_ctl */
 			/* 0x1.6d59 = (4 * 28636360/8 * 2/455) / 44100 */
 			cx25840_write4(client, 0x900, 0x08016d59);
 			cx25840_write4(client, 0x904, 0x08016d59);
 			cx25840_write4(client, 0x90c, 0x08016d59);
 			break;

 		case 48000:
 			/*
 			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
 			 * AUX_PLL Integer = 0x0a, AUX PLL Post Divider = 0x10
 			 */
 			cx25840_write4(client, 0x108, 0x100a040f);

 			/*
 			 * VID_PLL Fraction (register 0x10c) = 0x2be2fe
 			 * 28636360 * 0xf.15f17f0/4 = 108 MHz
 			 * 432 MHz pre-postdivide
 			 */

 			/*
 			 * AUX_PLL Fraction = 0x098d6e5
 			 * 28636363 * 0xa.4c6b728/0x10 = 48000 * 384
 			 * 295 MHz pre-postdivide
 			 * FIXME 28636363 ref_freq doesn't match VID PLL ref
 			 */
 			cx25840_write4(client, 0x110, 0x0098d6e5);

 			/*
 			 * SA_MCLK_SEL = 1
 			 * SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
 			 */
 			cx25840_write(client, 0x127, 0x50);

 			if (is_cx2583x(state))
 				break;

 			/* src3/4/6_ctl */
 			/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
 			cx25840_write4(client, 0x900, 0x08014faa);
 			cx25840_write4(client, 0x904, 0x08014faa);
 			cx25840_write4(client, 0x90c, 0x08014faa);
 			break;
 		}
 	} else {
 		switch (freq) {
 		case 32000:
 			/*
 			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
 			 * AUX_PLL Integer = 0x08, AUX PLL Post Divider = 0x1e
 			 */
 			cx25840_write4(client, 0x108, 0x1e08040f);

 			/*
 			 * VID_PLL Fraction (register 0x10c) = 0x2be2fe
 			 * 28636360 * 0xf.15f17f0/4 = 108 MHz
 			 * 432 MHz pre-postdivide
 			 */

 			/*
 			 * AUX_PLL Fraction = 0x12a0869
 			 * 28636363 * 0x8.9504348/0x1e = 32000 * 256
 			 * 246 MHz pre-postdivide
 			 * FIXME 28636363 ref_freq doesn't match VID PLL ref
 			 */
 			cx25840_write4(client, 0x110, 0x012a0869);

 			/*
 			 * SA_MCLK_SEL = 1
 			 * SA_MCLK_DIV = 0x14 = 256/384 * AUX_PLL post dvivider
 			 */
 			cx25840_write(client, 0x127, 0x54);

 			if (is_cx2583x(state))
 				break;

 			/* src1_ctl */
 			/* 0x1.0000 = 32000/32000 */
 			cx25840_write4(client, 0x8f8, 0x08010000);

 			/* src3/4/6_ctl */
 			/* 0x2.0000 = 2 * (32000/32000) */
 			cx25840_write4(client, 0x900, 0x08020000);
 			cx25840_write4(client, 0x904, 0x08020000);
 			cx25840_write4(client, 0x90c, 0x08020000);
 			break;

 		case 44100:
 			/*
 			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
 			 * AUX_PLL Integer = 0x09, AUX PLL Post Divider = 0x18
 			 */
 			cx25840_write4(client, 0x108, 0x1809040f);

 			/*
 			 * VID_PLL Fraction (register 0x10c) = 0x2be2fe
 			 * 28636360 * 0xf.15f17f0/4 = 108 MHz
 			 * 432 MHz pre-postdivide
 			 */

 			/*
 			 * AUX_PLL Fraction = 0x0ec6bd6
 			 * 28636363 * 0x9.7635eb0/0x18 = 44100 * 256
 			 * 271 MHz pre-postdivide
 			 * FIXME 28636363 ref_freq doesn't match VID PLL ref
 			 */
 			cx25840_write4(client, 0x110, 0x00ec6bd6);

 			/*
 			 * SA_MCLK_SEL = 1
 			 * SA_MCLK_DIV = 0x10 = 256/384 * AUX_PLL post dvivider
 			 */
 			cx25840_write(client, 0x127, 0x50);

 			if (is_cx2583x(state))
 				break;

 			/* src1_ctl */
 			/* 0x1.60cd = 44100/32000 */
 			cx25840_write4(client, 0x8f8, 0x080160cd);

 			/* src3/4/6_ctl */
 			/* 0x1.7385 = 2 * (32000/44100) */
 			cx25840_write4(client, 0x900, 0x08017385);
 			cx25840_write4(client, 0x904, 0x08017385);
 			cx25840_write4(client, 0x90c, 0x08017385);
 			break;

 		case 48000:
 			/*
 			 * VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
 			 * AUX_PLL Integer = 0x0a, AUX PLL Post Divider = 0x18
 			 */
 			cx25840_write4(client, 0x108, 0x180a040f);

 			/*
 			 * VID_PLL Fraction (register 0x10c) = 0x2be2fe
 			 * 28636360 * 0xf.15f17f0/4 = 108 MHz
 			 * 432 MHz pre-postdivide
 			 */

 			/*
 			 * AUX_PLL Fraction = 0x098d6e5
 			 * 28636363 * 0xa.4c6b728/0x18 = 48000 * 256
 			 * 295 MHz pre-postdivide
 			 * FIXME 28636363 ref_freq doesn't match VID PLL ref
 			 */
 			cx25840_write4(client, 0x110, 0x0098d6e5);

 			/*
 			 * SA_MCLK_SEL = 1
 			 * SA_MCLK_DIV = 0x10 = 256/384 * AUX_PLL post dvivider
 			 */
 			cx25840_write(client, 0x127, 0x50);

 			if (is_cx2583x(state))
 				break;

 			/* src1_ctl */
 			/* 0x1.8000 = 48000/32000 */
 			cx25840_write4(client, 0x8f8, 0x08018000);

 			/* src3/4/6_ctl */
 			/* 0x1.5555 = 2 * (32000/48000) */
 			cx25840_write4(client, 0x900, 0x08015555);
 			cx25840_write4(client, 0x904, 0x08015555);
 			cx25840_write4(client, 0x90c, 0x08015555);
 			break;
 		}
 	}

 	state->audclk_freq = freq;

 	return 0;
 }

 static inline int cx25836_set_audclk_freq(struct i2c_client *client, u32 freq)
 {
 	return cx25840_set_audclk_freq(client, freq);
 }

 static int cx23885_set_audclk_freq(struct i2c_client *client, u32 freq)
 {
 	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

 	if (state->aud_input != CX25840_AUDIO_SERIAL) {
 		switch (freq) {
 		case 32000:
 		case 44100:
 		case 48000:
 			/* We don't have register values
 			 * so avoid destroying registers. */
 			/* FIXME return -EINVAL; */
 			break;
 		}
 	} else {
 		switch (freq) {
 		case 32000:
 		case 44100:
 			/* We don't have register values
 			 * so avoid destroying registers. */
 			/* FIXME return -EINVAL; */
 			break;

 		case 48000:
 			/* src1_ctl */
 			/* 0x1.867c = 48000 / (2 * 28636360/8 * 2/455) */
 			cx25840_write4(client, 0x8f8, 0x0801867c);

 			/* src3/4/6_ctl */
 			/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
 			cx25840_write4(client, 0x900, 0x08014faa);
 			cx25840_write4(client, 0x904, 0x08014faa);
 			cx25840_write4(client, 0x90c, 0x08014faa);
 			break;
 		}
 	}

 	state->audclk_freq = freq;

 	return 0;
 }

 static int cx231xx_set_audclk_freq(struct i2c_client *client, u32 freq)
 {
 	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

 	if (state->aud_input != CX25840_AUDIO_SERIAL) {
 		switch (freq) {
 		case 32000:
 			/* src3/4/6_ctl */
 			/* 0x1.f77f = (4 * 28636360/8 * 2/455) / 32000 */
 			cx25840_write4(client, 0x900, 0x0801f77f);
 			cx25840_write4(client, 0x904, 0x0801f77f);
 			cx25840_write4(client, 0x90c, 0x0801f77f);
 			break;

 		case 44100:
 			/* src3/4/6_ctl */
 			/* 0x1.6d59 = (4 * 28636360/8 * 2/455) / 44100 */
 			cx25840_write4(client, 0x900, 0x08016d59);
 			cx25840_write4(client, 0x904, 0x08016d59);
 			cx25840_write4(client, 0x90c, 0x08016d59);
 			break;

 		case 48000:
 			/* src3/4/6_ctl */
 			/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
 			cx25840_write4(client, 0x900, 0x08014faa);
 			cx25840_write4(client, 0x904, 0x08014faa);
 			cx25840_write4(client, 0x90c, 0x08014faa);
 			break;
 		}
 	} else {
 		switch (freq) {
 		/* FIXME These cases make different assumptions about audclk */
 		case 32000:
 			/* src1_ctl */
 			/* 0x1.0000 = 32000/32000 */
 			cx25840_write4(client, 0x8f8, 0x08010000);

 			/* src3/4/6_ctl */
 			/* 0x2.0000 = 2 * (32000/32000) */
 			cx25840_write4(client, 0x900, 0x08020000);
 			cx25840_write4(client, 0x904, 0x08020000);
 			cx25840_write4(client, 0x90c, 0x08020000);
 			break;

 		case 44100:
 			/* src1_ctl */
 			/* 0x1.60cd = 44100/32000 */
 			cx25840_write4(client, 0x8f8, 0x080160cd);

 			/* src3/4/6_ctl */
 			/* 0x1.7385 = 2 * (32000/44100) */
 			cx25840_write4(client, 0x900, 0x08017385);
 			cx25840_write4(client, 0x904, 0x08017385);
 			cx25840_write4(client, 0x90c, 0x08017385);
 			break;

 		case 48000:
 			/* src1_ctl */
 			/* 0x1.867c = 48000 / (2 * 28636360/8 * 2/455) */
 			cx25840_write4(client, 0x8f8, 0x0801867c);

 			/* src3/4/6_ctl */
 			/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
 			cx25840_write4(client, 0x900, 0x08014faa);
 			cx25840_write4(client, 0x904, 0x08014faa);
 			cx25840_write4(client, 0x90c, 0x08014faa);
 			break;
 		}
 	}

 	state->audclk_freq = freq;

 	return 0;
 }

 static int set_audclk_freq(struct i2c_client *client, u32 freq)
 {
 	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

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

 	if (is_cx231xx(state))
 		return cx231xx_set_audclk_freq(client, freq);

 	if (is_cx2388x(state))
 		return cx23885_set_audclk_freq(client, freq);

 	if (is_cx2583x(state))
 		return cx25836_set_audclk_freq(client, freq);

 	return cx25840_set_audclk_freq(client, freq);
 }

 void cx25840_audio_set_path(struct i2c_client *client)
 {
 	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

 	if (!is_cx2583x(state)) {
 		/* assert soft reset */
 		cx25840_and_or(client, 0x810, ~0x1, 0x01);

 		/* stop microcontroller */
 		cx25840_and_or(client, 0x803, ~0x10, 0);

 		/* Mute everything to prevent the PFFT! */
 		cx25840_write(client, 0x8d3, 0x1f);

 		if (state->aud_input == CX25840_AUDIO_SERIAL) {
 			/* Set Path1 to Serial Audio Input */
 			cx25840_write4(client, 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 */
 			cx25840_write4(client, 0x8d0, 0x1f063870);
 		}
 	}

 	set_audclk_freq(client, state->audclk_freq);

 	if (!is_cx2583x(state)) {
 		if (state->aud_input != CX25840_AUDIO_SERIAL) {
 			/* When the microcontroller detects the
 			 * audio format, it will unmute the lines */
 			cx25840_and_or(client, 0x803, ~0x10, 0x10);
 		}

 		/* deassert soft reset */
 		cx25840_and_or(client, 0x810, ~0x1, 0x00);

 		/* Ensure the controller is running when we exit */
 		if (is_cx2388x(state) || is_cx231xx(state))
 			cx25840_and_or(client, 0x803, ~0x10, 0x10);
 	}
 }

 static void set_volume(struct i2c_client *client, int volume)
 {
 	int vol;

 	/* Convert the volume to msp3400 values (0-127) */
 	vol = volume >> 9;

 	/* now scale it up to cx25840 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 */
 	cx25840_write(client, 0x8d4, 228 - (vol * 2));
 }

 static void set_balance(struct i2c_client *client, int balance)
 {
 	int bal = balance >> 8;
 	if (bal > 0x80) {
 		/* PATH1_BAL_LEFT */
 		cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 		/* PATH1_BAL_LEVEL */
 		cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 	} else {
 		/* PATH1_BAL_LEFT */
 		cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 		/* PATH1_BAL_LEVEL */
 		cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 	}
 }

 int cx25840_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
 {
 	struct i2c_client *client = v4l2_get_subdevdata(sd);
 	struct cx25840_state *state = to_state(sd);
 	int retval;

 	if (!is_cx2583x(state))
 		cx25840_and_or(client, 0x810, ~0x1, 1);
 	if (state->aud_input != CX25840_AUDIO_SERIAL) {
 		cx25840_and_or(client, 0x803, ~0x10, 0);
 		cx25840_write(client, 0x8d3, 0x1f);
 	}
 	retval = set_audclk_freq(client, freq);
 	if (state->aud_input != CX25840_AUDIO_SERIAL)
 		cx25840_and_or(client, 0x803, ~0x10, 0x10);
 	if (!is_cx2583x(state))
 		cx25840_and_or(client, 0x810, ~0x1, 0);
 	return retval;
 }

 static int cx25840_audio_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct v4l2_subdev *sd = to_sd(ctrl);
 	struct cx25840_state *state = to_state(sd);
 	struct i2c_client *client = v4l2_get_subdevdata(sd);

 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_VOLUME:
 		if (state->mute->val)
 			set_volume(client, 0);
 		else
 			set_volume(client, state->volume->val);
 		break;
 	case V4L2_CID_AUDIO_BASS:
 		/* PATH1_EQ_BASS_VOL */
 		cx25840_and_or(client, 0x8d9, ~0x3f,
 					48 - (ctrl->val * 48 / 0xffff));
 		break;
 	case V4L2_CID_AUDIO_TREBLE:
 		/* PATH1_EQ_TREBLE_VOL */
 		cx25840_and_or(client, 0x8db, ~0x3f,
 					48 - (ctrl->val * 48 / 0xffff));
 		break;
 	case V4L2_CID_AUDIO_BALANCE:
 		set_balance(client, ctrl->val);
 		break;
 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 const struct v4l2_ctrl_ops cx25840_audio_ctrl_ops = {
 	.s_ctrl = cx25840_audio_s_ctrl,
 };
	/* cx25840 audio functions
	*
	* 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 <linux/videodev2.h>
	#include <linux/i2c.h>
	#include <media/v4l2-common.h>
	#include <media/cx25840.h>

	#include "cx25840-core.h"

	/*
	* Note: The PLL and SRC parameters are based on a reference frequency that
	* would ideally be:
	*
	* NTSC Color subcarrier freq * 8 = 4.5 MHz/286 * 455/2 * 8 = 28.63636363... MHz
	*
	* However, it's not the exact reference frequency that matters, only that the
	* firmware and modules that comprise the driver for a particular board all
	* use the same value (close to the ideal value).
	*
	* Comments below will note which reference frequency is assumed for various
	* parameters. They will usually be one of
	*
	* ref_freq = 28.636360 MHz
	* or
	* ref_freq = 28.636363 MHz
	*/

	static int cx25840_set_audclk_freq(struct i2c_client *client, u32 freq)
	{
	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

	if (state->aud_input != CX25840_AUDIO_SERIAL) {
	switch (freq) {
	case 32000:
	/*
	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	* AUX_PLL Integer = 0x06, AUX PLL Post Divider = 0x10
	*/
	cx25840_write4(client, 0x108, 0x1006040f);

	/*
	* VID_PLL Fraction (register 0x10c) = 0x2be2fe
	* 28636360 * 0xf.15f17f0/4 = 108 MHz
	* 432 MHz pre-postdivide
	*/

	/*
	* AUX_PLL Fraction = 0x1bb39ee
	* 28636363 * 0x6.dd9cf70/0x10 = 32000 * 384
	* 196.6 MHz pre-postdivide
	* FIXME < 200 MHz is out of specified valid range
	* FIXME 28636363 ref_freq doesn't match VID PLL ref
	*/
	cx25840_write4(client, 0x110, 0x01bb39ee);

	/*
	* SA_MCLK_SEL = 1
	* SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
	*/
	cx25840_write(client, 0x127, 0x50);

	if (is_cx2583x(state))
	break;

	/* src3/4/6_ctl */
	/* 0x1.f77f = (4 * 28636360/8 * 2/455) / 32000 */
	cx25840_write4(client, 0x900, 0x0801f77f);
	cx25840_write4(client, 0x904, 0x0801f77f);
	cx25840_write4(client, 0x90c, 0x0801f77f);
	break;

	case 44100:
	/*
	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	* AUX_PLL Integer = 0x09, AUX PLL Post Divider = 0x10
	*/
	cx25840_write4(client, 0x108, 0x1009040f);

	/*
	* VID_PLL Fraction (register 0x10c) = 0x2be2fe
	* 28636360 * 0xf.15f17f0/4 = 108 MHz
	* 432 MHz pre-postdivide
	*/

	/*
	* AUX_PLL Fraction = 0x0ec6bd6
	* 28636363 * 0x9.7635eb0/0x10 = 44100 * 384
	* 271 MHz pre-postdivide
	* FIXME 28636363 ref_freq doesn't match VID PLL ref
	*/
	cx25840_write4(client, 0x110, 0x00ec6bd6);

	/*
	* SA_MCLK_SEL = 1
	* SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
	*/
	cx25840_write(client, 0x127, 0x50);

	if (is_cx2583x(state))
	break;

	/* src3/4/6_ctl */
	/* 0x1.6d59 = (4 * 28636360/8 * 2/455) / 44100 */
	cx25840_write4(client, 0x900, 0x08016d59);
	cx25840_write4(client, 0x904, 0x08016d59);
	cx25840_write4(client, 0x90c, 0x08016d59);
	break;

	case 48000:
	/*
	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	* AUX_PLL Integer = 0x0a, AUX PLL Post Divider = 0x10
	*/
	cx25840_write4(client, 0x108, 0x100a040f);

	/*
	* VID_PLL Fraction (register 0x10c) = 0x2be2fe
	* 28636360 * 0xf.15f17f0/4 = 108 MHz
	* 432 MHz pre-postdivide
	*/

	/*
	* AUX_PLL Fraction = 0x098d6e5
	* 28636363 * 0xa.4c6b728/0x10 = 48000 * 384
	* 295 MHz pre-postdivide
	* FIXME 28636363 ref_freq doesn't match VID PLL ref
	*/
	cx25840_write4(client, 0x110, 0x0098d6e5);

	/*
	* SA_MCLK_SEL = 1
	* SA_MCLK_DIV = 0x10 = 384/384 * AUX_PLL post dvivider
	*/
	cx25840_write(client, 0x127, 0x50);

	if (is_cx2583x(state))
	break;

	/* src3/4/6_ctl */
	/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
	cx25840_write4(client, 0x900, 0x08014faa);
	cx25840_write4(client, 0x904, 0x08014faa);
	cx25840_write4(client, 0x90c, 0x08014faa);
	break;
	}
	} else {
	switch (freq) {
	case 32000:
	/*
	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	* AUX_PLL Integer = 0x08, AUX PLL Post Divider = 0x1e
	*/
	cx25840_write4(client, 0x108, 0x1e08040f);

	/*
	* VID_PLL Fraction (register 0x10c) = 0x2be2fe
	* 28636360 * 0xf.15f17f0/4 = 108 MHz
	* 432 MHz pre-postdivide
	*/

	/*
	* AUX_PLL Fraction = 0x12a0869
	* 28636363 * 0x8.9504348/0x1e = 32000 * 256
	* 246 MHz pre-postdivide
	* FIXME 28636363 ref_freq doesn't match VID PLL ref
	*/
	cx25840_write4(client, 0x110, 0x012a0869);

	/*
	* SA_MCLK_SEL = 1
	* SA_MCLK_DIV = 0x14 = 256/384 * AUX_PLL post dvivider
	*/
	cx25840_write(client, 0x127, 0x54);

	if (is_cx2583x(state))
	break;

	/* src1_ctl */
	/* 0x1.0000 = 32000/32000 */
	cx25840_write4(client, 0x8f8, 0x08010000);

	/* src3/4/6_ctl */
	/* 0x2.0000 = 2 * (32000/32000) */
	cx25840_write4(client, 0x900, 0x08020000);
	cx25840_write4(client, 0x904, 0x08020000);
	cx25840_write4(client, 0x90c, 0x08020000);
	break;

	case 44100:
	/*
	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	* AUX_PLL Integer = 0x09, AUX PLL Post Divider = 0x18
	*/
	cx25840_write4(client, 0x108, 0x1809040f);

	/*
	* VID_PLL Fraction (register 0x10c) = 0x2be2fe
	* 28636360 * 0xf.15f17f0/4 = 108 MHz
	* 432 MHz pre-postdivide
	*/

	/*
	* AUX_PLL Fraction = 0x0ec6bd6
	* 28636363 * 0x9.7635eb0/0x18 = 44100 * 256
	* 271 MHz pre-postdivide
	* FIXME 28636363 ref_freq doesn't match VID PLL ref
	*/
	cx25840_write4(client, 0x110, 0x00ec6bd6);

	/*
	* SA_MCLK_SEL = 1
	* SA_MCLK_DIV = 0x10 = 256/384 * AUX_PLL post dvivider
	*/
	cx25840_write(client, 0x127, 0x50);

	if (is_cx2583x(state))
	break;

	/* src1_ctl */
	/* 0x1.60cd = 44100/32000 */
	cx25840_write4(client, 0x8f8, 0x080160cd);

	/* src3/4/6_ctl */
	/* 0x1.7385 = 2 * (32000/44100) */
	cx25840_write4(client, 0x900, 0x08017385);
	cx25840_write4(client, 0x904, 0x08017385);
	cx25840_write4(client, 0x90c, 0x08017385);
	break;

	case 48000:
	/*
	* VID_PLL Integer = 0x0f, VID_PLL Post Divider = 0x04
	* AUX_PLL Integer = 0x0a, AUX PLL Post Divider = 0x18
	*/
	cx25840_write4(client, 0x108, 0x180a040f);

	/*
	* VID_PLL Fraction (register 0x10c) = 0x2be2fe
	* 28636360 * 0xf.15f17f0/4 = 108 MHz
	* 432 MHz pre-postdivide
	*/

	/*
	* AUX_PLL Fraction = 0x098d6e5
	* 28636363 * 0xa.4c6b728/0x18 = 48000 * 256
	* 295 MHz pre-postdivide
	* FIXME 28636363 ref_freq doesn't match VID PLL ref
	*/
	cx25840_write4(client, 0x110, 0x0098d6e5);

	/*
	* SA_MCLK_SEL = 1
	* SA_MCLK_DIV = 0x10 = 256/384 * AUX_PLL post dvivider
	*/
	cx25840_write(client, 0x127, 0x50);

	if (is_cx2583x(state))
	break;

	/* src1_ctl */
	/* 0x1.8000 = 48000/32000 */
	cx25840_write4(client, 0x8f8, 0x08018000);

	/* src3/4/6_ctl */
	/* 0x1.5555 = 2 * (32000/48000) */
	cx25840_write4(client, 0x900, 0x08015555);
	cx25840_write4(client, 0x904, 0x08015555);
	cx25840_write4(client, 0x90c, 0x08015555);
	break;
	}
	}

	state->audclk_freq = freq;

	return 0;
	}

	static inline int cx25836_set_audclk_freq(struct i2c_client *client, u32 freq)
	{
	return cx25840_set_audclk_freq(client, freq);
	}

	static int cx23885_set_audclk_freq(struct i2c_client *client, u32 freq)
	{
	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

	if (state->aud_input != CX25840_AUDIO_SERIAL) {
	switch (freq) {
	case 32000:
	case 44100:
	case 48000:
	/* We don't have register values
	* so avoid destroying registers. */
	/* FIXME return -EINVAL; */
	break;
	}
	} else {
	switch (freq) {
	case 32000:
	case 44100:
	/* We don't have register values
	* so avoid destroying registers. */
	/* FIXME return -EINVAL; */
	break;

	case 48000:
	/* src1_ctl */
	/* 0x1.867c = 48000 / (2 * 28636360/8 * 2/455) */
	cx25840_write4(client, 0x8f8, 0x0801867c);

	/* src3/4/6_ctl */
	/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
	cx25840_write4(client, 0x900, 0x08014faa);
	cx25840_write4(client, 0x904, 0x08014faa);
	cx25840_write4(client, 0x90c, 0x08014faa);
	break;
	}
	}

	state->audclk_freq = freq;

	return 0;
	}

	static int cx231xx_set_audclk_freq(struct i2c_client *client, u32 freq)
	{
	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

	if (state->aud_input != CX25840_AUDIO_SERIAL) {
	switch (freq) {
	case 32000:
	/* src3/4/6_ctl */
	/* 0x1.f77f = (4 * 28636360/8 * 2/455) / 32000 */
	cx25840_write4(client, 0x900, 0x0801f77f);
	cx25840_write4(client, 0x904, 0x0801f77f);
	cx25840_write4(client, 0x90c, 0x0801f77f);
	break;

	case 44100:
	/* src3/4/6_ctl */
	/* 0x1.6d59 = (4 * 28636360/8 * 2/455) / 44100 */
	cx25840_write4(client, 0x900, 0x08016d59);
	cx25840_write4(client, 0x904, 0x08016d59);
	cx25840_write4(client, 0x90c, 0x08016d59);
	break;

	case 48000:
	/* src3/4/6_ctl */
	/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
	cx25840_write4(client, 0x900, 0x08014faa);
	cx25840_write4(client, 0x904, 0x08014faa);
	cx25840_write4(client, 0x90c, 0x08014faa);
	break;
	}
	} else {
	switch (freq) {
	/* FIXME These cases make different assumptions about audclk */
	case 32000:
	/* src1_ctl */
	/* 0x1.0000 = 32000/32000 */
	cx25840_write4(client, 0x8f8, 0x08010000);

	/* src3/4/6_ctl */
	/* 0x2.0000 = 2 * (32000/32000) */
	cx25840_write4(client, 0x900, 0x08020000);
	cx25840_write4(client, 0x904, 0x08020000);
	cx25840_write4(client, 0x90c, 0x08020000);
	break;

	case 44100:
	/* src1_ctl */
	/* 0x1.60cd = 44100/32000 */
	cx25840_write4(client, 0x8f8, 0x080160cd);

	/* src3/4/6_ctl */
	/* 0x1.7385 = 2 * (32000/44100) */
	cx25840_write4(client, 0x900, 0x08017385);
	cx25840_write4(client, 0x904, 0x08017385);
	cx25840_write4(client, 0x90c, 0x08017385);
	break;

	case 48000:
	/* src1_ctl */
	/* 0x1.867c = 48000 / (2 * 28636360/8 * 2/455) */
	cx25840_write4(client, 0x8f8, 0x0801867c);

	/* src3/4/6_ctl */
	/* 0x1.4faa = (4 * 28636360/8 * 2/455) / 48000 */
	cx25840_write4(client, 0x900, 0x08014faa);
	cx25840_write4(client, 0x904, 0x08014faa);
	cx25840_write4(client, 0x90c, 0x08014faa);
	break;
	}
	}

	state->audclk_freq = freq;

	return 0;
	}

	static int set_audclk_freq(struct i2c_client *client, u32 freq)
	{
	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

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

	if (is_cx231xx(state))
	return cx231xx_set_audclk_freq(client, freq);

	if (is_cx2388x(state))
	return cx23885_set_audclk_freq(client, freq);

	if (is_cx2583x(state))
	return cx25836_set_audclk_freq(client, freq);

	return cx25840_set_audclk_freq(client, freq);
	}

	void cx25840_audio_set_path(struct i2c_client *client)
	{
	struct cx25840_state *state = to_state(i2c_get_clientdata(client));

	if (!is_cx2583x(state)) {
	/* assert soft reset */
	cx25840_and_or(client, 0x810, ~0x1, 0x01);

	/* stop microcontroller */
	cx25840_and_or(client, 0x803, ~0x10, 0);

	/* Mute everything to prevent the PFFT! */
	cx25840_write(client, 0x8d3, 0x1f);

	if (state->aud_input == CX25840_AUDIO_SERIAL) {
	/* Set Path1 to Serial Audio Input */
	cx25840_write4(client, 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 */
	cx25840_write4(client, 0x8d0, 0x1f063870);
	}
	}

	set_audclk_freq(client, state->audclk_freq);

	if (!is_cx2583x(state)) {
	if (state->aud_input != CX25840_AUDIO_SERIAL) {
	/* When the microcontroller detects the
	* audio format, it will unmute the lines */
	cx25840_and_or(client, 0x803, ~0x10, 0x10);
	}

	/* deassert soft reset */
	cx25840_and_or(client, 0x810, ~0x1, 0x00);

	/* Ensure the controller is running when we exit */
	if (is_cx2388x(state) \|\| is_cx231xx(state))
	cx25840_and_or(client, 0x803, ~0x10, 0x10);
	}
	}

	static void set_volume(struct i2c_client *client, int volume)
	{
	int vol;

	/* Convert the volume to msp3400 values (0-127) */
	vol = volume >> 9;

	/* now scale it up to cx25840 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 */
	cx25840_write(client, 0x8d4, 228 - (vol * 2));
	}

	static void set_balance(struct i2c_client *client, int balance)
	{
	int bal = balance >> 8;
	if (bal > 0x80) {
	/* PATH1_BAL_LEFT */
	cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
	/* PATH1_BAL_LEVEL */
	cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
	} else {
	/* PATH1_BAL_LEFT */
	cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
	/* PATH1_BAL_LEVEL */
	cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
	}
	}

	int cx25840_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
	{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct cx25840_state *state = to_state(sd);
	int retval;

	if (!is_cx2583x(state))
	cx25840_and_or(client, 0x810, ~0x1, 1);
	if (state->aud_input != CX25840_AUDIO_SERIAL) {
	cx25840_and_or(client, 0x803, ~0x10, 0);
	cx25840_write(client, 0x8d3, 0x1f);
	}
	retval = set_audclk_freq(client, freq);
	if (state->aud_input != CX25840_AUDIO_SERIAL)
	cx25840_and_or(client, 0x803, ~0x10, 0x10);
	if (!is_cx2583x(state))
	cx25840_and_or(client, 0x810, ~0x1, 0);
	return retval;
	}

	static int cx25840_audio_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct cx25840_state *state = to_state(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_VOLUME:
	if (state->mute->val)
	set_volume(client, 0);
	else
	set_volume(client, state->volume->val);
	break;
	case V4L2_CID_AUDIO_BASS:
	/* PATH1_EQ_BASS_VOL */
	cx25840_and_or(client, 0x8d9, ~0x3f,
	48 - (ctrl->val * 48 / 0xffff));
	break;
	case V4L2_CID_AUDIO_TREBLE:
	/* PATH1_EQ_TREBLE_VOL */
	cx25840_and_or(client, 0x8db, ~0x3f,
	48 - (ctrl->val * 48 / 0xffff));
	break;
	case V4L2_CID_AUDIO_BALANCE:
	set_balance(client, ctrl->val);
	break;
	default:
	return -EINVAL;
	}
	return 0;
	}

	const struct v4l2_ctrl_ops cx25840_audio_ctrl_ops = {
	.s_ctrl = cx25840_audio_s_ctrl,
	};