// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AD1843 low level driver
*
* Copyright 2003 Vivien Chappelier < vivien . chappelier @ linux - mips . org >
* Copyright 2008 Thomas Bogendoerfer < tsbogend @ alpha . franken . de >
*
* inspired from vwsnd . c ( SGI VW audio driver )
* Copyright 1999 Silicon Graphics , Inc . All rights reserved .
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ad1843.h>
/*
* AD1843 bitfield definitions . All are named as in the AD1843 data
* sheet , with ad1843_ prepended and individual bit numbers removed .
*
* E . g . , bits LSS0 through LSS2 become ad1843_LSS .
*
* Only the bitfields we need are defined .
*/
struct ad1843_bitfield {
char reg;
char lo_bit;
char nbits;
};
static const struct ad1843_bitfield
ad1843_PDNO = { 0 , 14 , 1 }, /* Converter Power-Down Flag */
ad1843_INIT = { 0 , 15 , 1 }, /* Clock Initialization Flag */
ad1843_RIG = { 2 , 0 , 4 }, /* Right ADC Input Gain */
ad1843_RMGE = { 2 , 4 , 1 }, /* Right ADC Mic Gain Enable */
ad1843_RSS = { 2 , 5 , 3 }, /* Right ADC Source Select */
ad1843_LIG = { 2 , 8 , 4 }, /* Left ADC Input Gain */
ad1843_LMGE = { 2 , 12 , 1 }, /* Left ADC Mic Gain Enable */
ad1843_LSS = { 2 , 13 , 3 }, /* Left ADC Source Select */
ad1843_RD2M = { 3 , 0 , 5 }, /* Right DAC 2 Mix Gain/Atten */
ad1843_RD2MM = { 3 , 7 , 1 }, /* Right DAC 2 Mix Mute */
ad1843_LD2M = { 3 , 8 , 5 }, /* Left DAC 2 Mix Gain/Atten */
ad1843_LD2MM = { 3 , 15 , 1 }, /* Left DAC 2 Mix Mute */
ad1843_RX1M = { 4 , 0 , 5 }, /* Right Aux 1 Mix Gain/Atten */
ad1843_RX1MM = { 4 , 7 , 1 }, /* Right Aux 1 Mix Mute */
ad1843_LX1M = { 4 , 8 , 5 }, /* Left Aux 1 Mix Gain/Atten */
ad1843_LX1MM = { 4 , 15 , 1 }, /* Left Aux 1 Mix Mute */
ad1843_RX2M = { 5 , 0 , 5 }, /* Right Aux 2 Mix Gain/Atten */
ad1843_RX2MM = { 5 , 7 , 1 }, /* Right Aux 2 Mix Mute */
ad1843_LX2M = { 5 , 8 , 5 }, /* Left Aux 2 Mix Gain/Atten */
ad1843_LX2MM = { 5 , 15 , 1 }, /* Left Aux 2 Mix Mute */
ad1843_RMCM = { 7 , 0 , 5 }, /* Right Mic Mix Gain/Atten */
ad1843_RMCMM = { 7 , 7 , 1 }, /* Right Mic Mix Mute */
ad1843_LMCM = { 7 , 8 , 5 }, /* Left Mic Mix Gain/Atten */
ad1843_LMCMM = { 7 , 15 , 1 }, /* Left Mic Mix Mute */
ad1843_HPOS = { 8 , 4 , 1 }, /* Headphone Output Voltage Swing */
ad1843_HPOM = { 8 , 5 , 1 }, /* Headphone Output Mute */
ad1843_MPOM = { 8 , 6 , 1 }, /* Mono Output Mute */
ad1843_RDA1G = { 9 , 0 , 6 }, /* Right DAC1 Analog/Digital Gain */
ad1843_RDA1GM = { 9 , 7 , 1 }, /* Right DAC1 Analog Mute */
ad1843_LDA1G = { 9 , 8 , 6 }, /* Left DAC1 Analog/Digital Gain */
ad1843_LDA1GM = { 9 , 15 , 1 }, /* Left DAC1 Analog Mute */
ad1843_RDA2G = { 10 , 0 , 6 }, /* Right DAC2 Analog/Digital Gain */
ad1843_RDA2GM = { 10 , 7 , 1 }, /* Right DAC2 Analog Mute */
ad1843_LDA2G = { 10 , 8 , 6 }, /* Left DAC2 Analog/Digital Gain */
ad1843_LDA2GM = { 10 , 15 , 1 }, /* Left DAC2 Analog Mute */
ad1843_RDA1AM = { 11 , 7 , 1 }, /* Right DAC1 Digital Mute */
ad1843_LDA1AM = { 11 , 15 , 1 }, /* Left DAC1 Digital Mute */
ad1843_RDA2AM = { 12 , 7 , 1 }, /* Right DAC2 Digital Mute */
ad1843_LDA2AM = { 12 , 15 , 1 }, /* Left DAC2 Digital Mute */
ad1843_ADLC = { 15 , 0 , 2 }, /* ADC Left Sample Rate Source */
ad1843_ADRC = { 15 , 2 , 2 }, /* ADC Right Sample Rate Source */
ad1843_DA1C = { 15 , 8 , 2 }, /* DAC1 Sample Rate Source */
ad1843_DA2C = { 15 , 10 , 2 }, /* DAC2 Sample Rate Source */
ad1843_C1C = { 17 , 0 , 16 }, /* Clock 1 Sample Rate Select */
ad1843_C2C = { 20 , 0 , 16 }, /* Clock 2 Sample Rate Select */
ad1843_C3C = { 23 , 0 , 16 }, /* Clock 3 Sample Rate Select */
ad1843_DAADL = { 25 , 4 , 2 }, /* Digital ADC Left Source Select */
ad1843_DAADR = { 25 , 6 , 2 }, /* Digital ADC Right Source Select */
ad1843_DAMIX = { 25 , 14 , 1 }, /* DAC Digital Mix Enable */
ad1843_DRSFLT = { 25 , 15 , 1 }, /* Digital Reampler Filter Mode */
ad1843_ADLF = { 26 , 0 , 2 }, /* ADC Left Channel Data Format */
ad1843_ADRF = { 26 , 2 , 2 }, /* ADC Right Channel Data Format */
ad1843_ADTLK = { 26 , 4 , 1 }, /* ADC Transmit Lock Mode Select */
ad1843_SCF = { 26 , 7 , 1 }, /* SCLK Frequency Select */
ad1843_DA1F = { 26 , 8 , 2 }, /* DAC1 Data Format Select */
ad1843_DA2F = { 26 , 10 , 2 }, /* DAC2 Data Format Select */
ad1843_DA1SM = { 26 , 14 , 1 }, /* DAC1 Stereo/Mono Mode Select */
ad1843_DA2SM = { 26 , 15 , 1 }, /* DAC2 Stereo/Mono Mode Select */
ad1843_ADLEN = { 27 , 0 , 1 }, /* ADC Left Channel Enable */
ad1843_ADREN = { 27 , 1 , 1 }, /* ADC Right Channel Enable */
ad1843_AAMEN = { 27 , 4 , 1 }, /* Analog to Analog Mix Enable */
ad1843_ANAEN = { 27 , 7 , 1 }, /* Analog Channel Enable */
ad1843_DA1EN = { 27 , 8 , 1 }, /* DAC1 Enable */
ad1843_DA2EN = { 27 , 9 , 1 }, /* DAC2 Enable */
ad1843_DDMEN = { 27 , 12 , 1 }, /* DAC2 to DAC1 Mix Enable */
ad1843_C1EN = { 28 , 11 , 1 }, /* Clock Generator 1 Enable */
ad1843_C2EN = { 28 , 12 , 1 }, /* Clock Generator 2 Enable */
ad1843_C3EN = { 28 , 13 , 1 }, /* Clock Generator 3 Enable */
ad1843_PDNI = { 28 , 15 , 1 }; /* Converter Power Down */
/*
* The various registers of the AD1843 use three different formats for
* specifying gain . The ad1843_gain structure parameterizes the
* formats .
*/
struct ad1843_gain {
int negative; /* nonzero if gain is negative. */
const struct ad1843_bitfield *lfield;
const struct ad1843_bitfield *rfield;
const struct ad1843_bitfield *lmute;
const struct ad1843_bitfield *rmute;
};
static const struct ad1843_gain ad1843_gain_RECLEV = {
.negative = 0 ,
.lfield = &ad1843_LIG,
.rfield = &ad1843_RIG
};
static const struct ad1843_gain ad1843_gain_LINE = {
.negative = 1 ,
.lfield = &ad1843_LX1M,
.rfield = &ad1843_RX1M,
.lmute = &ad1843_LX1MM,
.rmute = &ad1843_RX1MM
};
static const struct ad1843_gain ad1843_gain_LINE_2 = {
.negative = 1 ,
.lfield = &ad1843_LDA2G,
.rfield = &ad1843_RDA2G,
.lmute = &ad1843_LDA2GM,
.rmute = &ad1843_RDA2GM
};
static const struct ad1843_gain ad1843_gain_MIC = {
.negative = 1 ,
.lfield = &ad1843_LMCM,
.rfield = &ad1843_RMCM,
.lmute = &ad1843_LMCMM,
.rmute = &ad1843_RMCMM
};
static const struct ad1843_gain ad1843_gain_PCM_0 = {
.negative = 1 ,
.lfield = &ad1843_LDA1G,
.rfield = &ad1843_RDA1G,
.lmute = &ad1843_LDA1GM,
.rmute = &ad1843_RDA1GM
};
static const struct ad1843_gain ad1843_gain_PCM_1 = {
.negative = 1 ,
.lfield = &ad1843_LD2M,
.rfield = &ad1843_RD2M,
.lmute = &ad1843_LD2MM,
.rmute = &ad1843_RD2MM
};
static const struct ad1843_gain *ad1843_gain[AD1843_GAIN_SIZE] =
{
&ad1843_gain_RECLEV,
&ad1843_gain_LINE,
&ad1843_gain_LINE_2,
&ad1843_gain_MIC,
&ad1843_gain_PCM_0,
&ad1843_gain_PCM_1,
};
/* read the current value of an AD1843 bitfield. */
static int ad1843_read_bits(struct snd_ad1843 *ad1843,
const struct ad1843_bitfield *field)
{
int w;
w = ad1843->read(ad1843->chip, field->reg);
return w >> field->lo_bit & ((1 << field->nbits) - 1 );
}
/*
* write a new value to an AD1843 bitfield and return the old value .
*/
static int ad1843_write_bits(struct snd_ad1843 *ad1843,
const struct ad1843_bitfield *field,
int newval)
{
int w, mask, oldval, newbits;
w = ad1843->read(ad1843->chip, field->reg);
mask = ((1 << field->nbits) - 1 ) << field->lo_bit;
oldval = (w & mask) >> field->lo_bit;
newbits = (newval << field->lo_bit) & mask;
w = (w & ~mask) | newbits;
ad1843->write(ad1843->chip, field->reg, w);
return oldval;
}
/*
* ad1843_read_multi reads multiple bitfields from the same AD1843
* register . It uses a single read cycle to do it . ( Reading the
* ad1843 requires 256 bit times at 12 . 288 MHz , or nearly 20
* microseconds . )
*
* Called like this .
*
* ad1843_read_multi ( ad1843 , nfields ,
* & ad1843_FIELD1 , & val1 ,
* & ad1843_FIELD2 , & val2 , . . . ) ;
*/
static void ad1843_read_multi(struct snd_ad1843 *ad1843, int argcount, ...)
{
va_list ap;
const struct ad1843_bitfield *fp;
int w = 0 , mask, *value, reg = -1 ;
va_start(ap, argcount);
while (--argcount >= 0 ) {
fp = va_arg(ap, const struct ad1843_bitfield *);
value = va_arg(ap, int *);
if (reg == -1 ) {
reg = fp->reg;
w = ad1843->read(ad1843->chip, reg);
}
mask = (1 << fp->nbits) - 1 ;
*value = w >> fp->lo_bit & mask;
}
va_end(ap);
}
/*
* ad1843_write_multi stores multiple bitfields into the same AD1843
* register . It uses one read and one write cycle to do it .
*
* Called like this .
*
* ad1843_write_multi ( ad1843 , nfields ,
* & ad1843_FIELD1 , val1 ,
* & ad1843_FIELF2 , val2 , . . . ) ;
*/
static void ad1843_write_multi(struct snd_ad1843 *ad1843, int argcount, ...)
{
va_list ap;
int reg;
const struct ad1843_bitfield *fp;
int value;
int w, m, mask, bits;
mask = 0 ;
bits = 0 ;
reg = -1 ;
va_start(ap, argcount);
while (--argcount >= 0 ) {
fp = va_arg(ap, const struct ad1843_bitfield *);
value = va_arg(ap, int );
if (reg == -1 )
reg = fp->reg;
else
WARN_ON(reg != fp->reg);
m = ((1 << fp->nbits) - 1 ) << fp->lo_bit;
mask |= m;
bits |= (value << fp->lo_bit) & m;
}
va_end(ap);
if (~mask & 0 xFFFF)
w = ad1843->read(ad1843->chip, reg);
else
w = 0 ;
w = (w & ~mask) | bits;
ad1843->write(ad1843->chip, reg, w);
}
int ad1843_get_gain_max(struct snd_ad1843 *ad1843, int id)
{
const struct ad1843_gain *gp = ad1843_gain[id];
int ret;
ret = (1 << gp->lfield->nbits);
if (!gp->lmute)
ret -= 1 ;
return ret;
}
/*
* ad1843_get_gain reads the specified register and extracts the gain value
* using the supplied gain type .
*/
int ad1843_get_gain(struct snd_ad1843 *ad1843, int id)
{
int lg, rg, lm, rm;
const struct ad1843_gain *gp = ad1843_gain[id];
unsigned short mask = (1 << gp->lfield->nbits) - 1 ;
ad1843_read_multi(ad1843, 2 , gp->lfield, &lg, gp->rfield, &rg);
if (gp->negative) {
lg = mask - lg;
rg = mask - rg;
}
if (gp->lmute) {
ad1843_read_multi(ad1843, 2 , gp->lmute, &lm, gp->rmute, &rm);
if (lm)
lg = 0 ;
if (rm)
rg = 0 ;
}
return lg << 0 | rg << 8 ;
}
/*
* Set an audio channel ' s gain .
*
* Returns the new gain , which may be lower than the old gain .
*/
int ad1843_set_gain(struct snd_ad1843 *ad1843, int id, int newval)
{
const struct ad1843_gain *gp = ad1843_gain[id];
unsigned short mask = (1 << gp->lfield->nbits) - 1 ;
int lg = (newval >> 0 ) & mask;
int rg = (newval >> 8 ) & mask;
int lm = (lg == 0 ) ? 1 : 0 ;
int rm = (rg == 0 ) ? 1 : 0 ;
if (gp->negative) {
lg = mask - lg;
rg = mask - rg;
}
if (gp->lmute)
ad1843_write_multi(ad1843, 2 , gp->lmute, lm, gp->rmute, rm);
ad1843_write_multi(ad1843, 2 , gp->lfield, lg, gp->rfield, rg);
return ad1843_get_gain(ad1843, id);
}
/* Returns the current recording source */
int ad1843_get_recsrc(struct snd_ad1843 *ad1843)
{
int val = ad1843_read_bits(ad1843, &ad1843_LSS);
if (val < 0 || val > 2 ) {
val = 2 ;
ad1843_write_multi(ad1843, 2 ,
&ad1843_LSS, val, &ad1843_RSS, val);
}
return val;
}
/*
* Set recording source .
*
* Returns newsrc on success , - errno on failure .
*/
int ad1843_set_recsrc(struct snd_ad1843 *ad1843, int newsrc)
{
if (newsrc < 0 || newsrc > 2 )
return -EINVAL;
ad1843_write_multi(ad1843, 2 , &ad1843_LSS, newsrc, &ad1843_RSS, newsrc);
return newsrc;
}
/* Setup ad1843 for D/A conversion. */
void ad1843_setup_dac(struct snd_ad1843 *ad1843,
unsigned int id,
unsigned int framerate,
snd_pcm_format_t fmt,
unsigned int channels)
{
int ad_fmt = 0 , ad_mode = 0 ;
switch (fmt) {
case SNDRV_PCM_FORMAT_S8:
ad_fmt = 0 ;
break ;
case SNDRV_PCM_FORMAT_U8:
ad_fmt = 0 ;
break ;
case SNDRV_PCM_FORMAT_S16_LE:
ad_fmt = 1 ;
break ;
case SNDRV_PCM_FORMAT_MU_LAW:
ad_fmt = 2 ;
break ;
case SNDRV_PCM_FORMAT_A_LAW:
ad_fmt = 3 ;
break ;
default :
break ;
}
switch (channels) {
case 2 :
ad_mode = 0 ;
break ;
case 1 :
ad_mode = 1 ;
break ;
default :
break ;
}
if (id) {
ad1843_write_bits(ad1843, &ad1843_C2C, framerate);
ad1843_write_multi(ad1843, 2 ,
&ad1843_DA2SM, ad_mode,
&ad1843_DA2F, ad_fmt);
} else {
ad1843_write_bits(ad1843, &ad1843_C1C, framerate);
ad1843_write_multi(ad1843, 2 ,
&ad1843_DA1SM, ad_mode,
&ad1843_DA1F, ad_fmt);
}
}
void ad1843_shutdown_dac(struct snd_ad1843 *ad1843, unsigned int id)
{
if (id)
ad1843_write_bits(ad1843, &ad1843_DA2F, 1 );
else
ad1843_write_bits(ad1843, &ad1843_DA1F, 1 );
}
void ad1843_setup_adc(struct snd_ad1843 *ad1843,
unsigned int framerate,
snd_pcm_format_t fmt,
unsigned int channels)
{
int da_fmt = 0 ;
switch (fmt) {
case SNDRV_PCM_FORMAT_S8: da_fmt = 0 ; break ;
case SNDRV_PCM_FORMAT_U8: da_fmt = 0 ; break ;
case SNDRV_PCM_FORMAT_S16_LE: da_fmt = 1 ; break ;
case SNDRV_PCM_FORMAT_MU_LAW: da_fmt = 2 ; break ;
case SNDRV_PCM_FORMAT_A_LAW: da_fmt = 3 ; break ;
default : break ;
}
ad1843_write_bits(ad1843, &ad1843_C3C, framerate);
ad1843_write_multi(ad1843, 2 ,
&ad1843_ADLF, da_fmt, &ad1843_ADRF, da_fmt);
}
void ad1843_shutdown_adc(struct snd_ad1843 *ad1843)
{
/* nothing to do */
}
/*
* Fully initialize the ad1843 . As described in the AD1843 data
* sheet , section " START - UP SEQUENCE " . The numbered comments are
* subsection headings from the data sheet . See the data sheet , pages
* 52 - 54 , for more info .
*
* return 0 on success, -errno on failure. */
int ad1843_init(struct snd_ad1843 *ad1843)
{
unsigned long later;
if (ad1843_read_bits(ad1843, &ad1843_INIT) != 0 ) {
printk(KERN_ERR "ad1843: AD1843 won't initialize\n" );
return -EIO;
}
ad1843_write_bits(ad1843, &ad1843_SCF, 1 );
/* 4. Put the conversion resources into standby. */
ad1843_write_bits(ad1843, &ad1843_PDNI, 0 );
later = jiffies + msecs_to_jiffies(500 );
while (ad1843_read_bits(ad1843, &ad1843_PDNO)) {
if (time_after(jiffies, later)) {
printk(KERN_ERR
"ad1843: AD1843 won't power up\n" );
return -EIO;
}
schedule_timeout_interruptible(5 );
}
/* 5. Power up the clock generators and enable clock output pins. */
ad1843_write_multi(ad1843, 3 ,
&ad1843_C1EN, 1 ,
&ad1843_C2EN, 1 ,
&ad1843_C3EN, 1 );
/* 6. Configure conversion resources while they are in standby. */
/* DAC1/2 use clock 1/2 as source, ADC uses clock 3. Always. */
ad1843_write_multi(ad1843, 4 ,
&ad1843_DA1C, 1 ,
&ad1843_DA2C, 2 ,
&ad1843_ADLC, 3 ,
&ad1843_ADRC, 3 );
/* 7. Enable conversion resources. */
ad1843_write_bits(ad1843, &ad1843_ADTLK, 1 );
ad1843_write_multi(ad1843, 7 ,
&ad1843_ANAEN, 1 ,
&ad1843_AAMEN, 1 ,
&ad1843_DA1EN, 1 ,
&ad1843_DA2EN, 1 ,
&ad1843_DDMEN, 1 ,
&ad1843_ADLEN, 1 ,
&ad1843_ADREN, 1 );
/* 8. Configure conversion resources while they are enabled. */
/* set gain to 0 for all channels */
ad1843_set_gain(ad1843, AD1843_GAIN_RECLEV, 0 );
ad1843_set_gain(ad1843, AD1843_GAIN_LINE, 0 );
ad1843_set_gain(ad1843, AD1843_GAIN_LINE_2, 0 );
ad1843_set_gain(ad1843, AD1843_GAIN_MIC, 0 );
ad1843_set_gain(ad1843, AD1843_GAIN_PCM_0, 0 );
ad1843_set_gain(ad1843, AD1843_GAIN_PCM_1, 0 );
/* Unmute all channels. */
/* DAC1 */
ad1843_write_multi(ad1843, 2 , &ad1843_LDA1GM, 0 , &ad1843_RDA1GM, 0 );
/* DAC2 */
ad1843_write_multi(ad1843, 2 , &ad1843_LDA2GM, 0 , &ad1843_RDA2GM, 0 );
/* Set default recording source to Line In and set
* mic gain to + 20 dB .
*/
ad1843_set_recsrc(ad1843, 2 );
ad1843_write_multi(ad1843, 2 , &ad1843_LMGE, 1 , &ad1843_RMGE, 1 );
/* Set Speaker Out level to +/- 4V and unmute it. */
ad1843_write_multi(ad1843, 3 ,
&ad1843_HPOS, 1 ,
&ad1843_HPOM, 0 ,
&ad1843_MPOM, 0 );
return 0 ;
}
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