/*
* cx18 ADEC audio functions
*
* Derived from cx25840-audio.c
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
*
* 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;
/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
cx18_av_write(cx, 0x127, 0x50);
if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
switch (freq) {
case 32000:
/* VID_PLL and AUX_PLL */
cx18_av_write4(cx, 0x108, 0x1408040f);
/* AUX_PLL_FRAC */
/* 0x8.9504318a * 28,636,363.636 / 0x14 = 32000 * 384 */
cx18_av_write4(cx, 0x110, 0x012a0863);
/* src3/4/6_ctl */
/* 0x1.f77f = (4 * 15734.26) / 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=0x14 */
cx18_av_write(cx, 0x127, 0x54);
break;
case 44100:
/* VID_PLL and AUX_PLL */
cx18_av_write4(cx, 0x108, 0x1009040f);
/* AUX_PLL_FRAC */
/* 0x9.7635eb * 28,636,363 / 0x10 = 44100 * 384 */
cx18_av_write4(cx, 0x110, 0x00ec6bd6);
/* src3/4/6_ctl */
/* 0x1.6d59 = (4 * 15734.26) / 44100 */
cx18_av_write4(cx, 0x900, 0x08016d59);
cx18_av_write4(cx, 0x904, 0x08016d59);
cx18_av_write4(cx, 0x90c, 0x08016d59);
break;
case 48000:
/* VID_PLL and AUX_PLL */
cx18_av_write4(cx, 0x108, 0x100a040f);
/* AUX_PLL_FRAC */
/* 0xa.4c6b728 * 28,636,363 / 0x10 = 48000 * 384 */
cx18_av_write4(cx, 0x110, 0x0098d6e5);
/* src3/4/6_ctl */
/* 0x1.4faa = (4 * 15734.26) / 48000 */
cx18_av_write4(cx, 0x900, 0x08014faa);
cx18_av_write4(cx, 0x904, 0x08014faa);
cx18_av_write4(cx, 0x90c, 0x08014faa);
break;
}
} else {
switch (freq) {
case 32000:
/* VID_PLL and AUX_PLL */
cx18_av_write4(cx, 0x108, 0x1e08040f);
/* AUX_PLL_FRAC */
/* 0x8.9504348 * 28,636,363 / 0x1e = 32000 * 256 */
cx18_av_write4(cx, 0x110, 0x012a0869);
/* 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=0x14 */
cx18_av_write(cx, 0x127, 0x54);
break;
case 44100:
/* VID_PLL and AUX_PLL */
cx18_av_write4(cx, 0x108, 0x1809040f);
/* AUX_PLL_FRAC */
/* 0x9.76346B * 28,636,363 / 0x18 = 44100 * 256 */
cx18_av_write4(cx, 0x110, 0x00ec6bd6);
/* 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);
break;
case 48000:
/* VID_PLL and AUX_PLL */
cx18_av_write4(cx, 0x108, 0x180a040f);
/* AUX_PLL_FRAC */
/* 0xa.4c6b728 * 28,636,363 / 0x18 = 48000 * 256 */
cx18_av_write4(cx, 0x110, 0x0098d6e5);
/* 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);
break;
}
}
state->audclk_freq = freq;
return 0;
}
void cx18_av_audio_set_path(struct cx18 *cx)
{
struct cx18_av_state *state = &cx->av_state;
/* stop microcontroller */
cx18_av_and_or(cx, 0x803, ~0x10, 0);
/* assert soft reset */
cx18_av_and_or(cx, 0x810, ~0x1, 0x01);
/* 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 */
cx18_av_and_or(cx, 0x810, ~0x1, 0x00);
if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
/* When the microcontroller detects the
* audio format, it will unmute the lines */
cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
}
}
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;
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. */
if (mute) {
/* disable microcontroller */
cx18_av_and_or(cx, 0x803, ~0x10, 0x00);
cx18_av_write(cx, 0x8d3, 0x1f);
} else {
/* enable microcontroller */
cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
}
} else {
/* SRC1_MUTE_EN */
cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
}
}
int cx18_av_audio(struct cx18 *cx, unsigned int cmd, void *arg)
{
struct cx18_av_state *state = &cx->av_state;
struct v4l2_control *ctrl = arg;
int retval;
switch (cmd) {
case VIDIOC_INT_AUDIO_CLOCK_FREQ:
if (state->aud_input > CX18_AV_AUDIO_SERIAL2) {
cx18_av_and_or(cx, 0x803, ~0x10, 0);
cx18_av_write(cx, 0x8d3, 0x1f);
}
cx18_av_and_or(cx, 0x810, ~0x1, 1);
retval = set_audclk_freq(cx, *(u32 *)arg);
cx18_av_and_or(cx, 0x810, ~0x1, 0);
if (state->aud_input > CX18_AV_AUDIO_SERIAL2)
cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
return retval;
case VIDIOC_G_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;
}
break;
case VIDIOC_S_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;
}
break;
default:
return -EINVAL;
}
return 0;
}
