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linux_dsm_epyc7002/sound/soc/codecs/nau8825.c
John Hsu 1e561f6166 ASoC: nau8825: automatic BCLK and LRC divde in master mode 
configurable LRC and BCLK divide. The driver
will make configurations of LRC and BCLK automatically according to
BCLK and FS information in master mode.

Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-17 10:42:53 +00:00

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/*
* Nuvoton NAU8825 audio codec driver
*
* Copyright 2015 Google Chromium project.
* Author: Anatol Pomozov <anatol@chromium.org>
* Copyright 2015 Nuvoton Technology Corp.
* Co-author: Meng-Huang Kuo <mhkuo@nuvoton.com>
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/acpi.h>
#include <linux/math64.h>
#include <linux/semaphore.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include "nau8825.h"
#define NUVOTON_CODEC_DAI "nau8825-hifi"
#define NAU_FREF_MAX 13500000
#define NAU_FVCO_MAX 124000000
#define NAU_FVCO_MIN 90000000
/* cross talk suppression detection */
#define LOG10_MAGIC 646456993
#define GAIN_AUGMENT 22500
#define SIDETONE_BASE 207000
/* the maximum frequency of CLK_ADC and CLK_DAC */
#define CLK_DA_AD_MAX 6144000
static int nau8825_configure_sysclk(struct nau8825 *nau8825,
int clk_id, unsigned int freq);
struct nau8825_fll {
int mclk_src;
int ratio;
int fll_frac;
int fll_int;
int clk_ref_div;
};
struct nau8825_fll_attr {
unsigned int param;
unsigned int val;
};
/* scaling for mclk from sysclk_src output */
static const struct nau8825_fll_attr mclk_src_scaling[] = {
{ 1, 0x0 },
{ 2, 0x2 },
{ 4, 0x3 },
{ 8, 0x4 },
{ 16, 0x5 },
{ 32, 0x6 },
{ 3, 0x7 },
{ 6, 0xa },
{ 12, 0xb },
{ 24, 0xc },
{ 48, 0xd },
{ 96, 0xe },
{ 5, 0xf },
};
/* ratio for input clk freq */
static const struct nau8825_fll_attr fll_ratio[] = {
{ 512000, 0x01 },
{ 256000, 0x02 },
{ 128000, 0x04 },
{ 64000, 0x08 },
{ 32000, 0x10 },
{ 8000, 0x20 },
{ 4000, 0x40 },
};
static const struct nau8825_fll_attr fll_pre_scalar[] = {
{ 1, 0x0 },
{ 2, 0x1 },
{ 4, 0x2 },
{ 8, 0x3 },
};
/* over sampling rate */
struct nau8825_osr_attr {
unsigned int osr;
unsigned int clk_src;
};
static const struct nau8825_osr_attr osr_dac_sel[] = {
{ 64, 2 }, /* OSR 64, SRC 1/4 */
{ 256, 0 }, /* OSR 256, SRC 1 */
{ 128, 1 }, /* OSR 128, SRC 1/2 */
{ 0, 0 },
{ 32, 3 }, /* OSR 32, SRC 1/8 */
};
static const struct nau8825_osr_attr osr_adc_sel[] = {
{ 32, 3 }, /* OSR 32, SRC 1/8 */
{ 64, 2 }, /* OSR 64, SRC 1/4 */
{ 128, 1 }, /* OSR 128, SRC 1/2 */
{ 256, 0 }, /* OSR 256, SRC 1 */
};
static const struct reg_default nau8825_reg_defaults[] = {
{ NAU8825_REG_ENA_CTRL, 0x00ff },
{ NAU8825_REG_IIC_ADDR_SET, 0x0 },
{ NAU8825_REG_CLK_DIVIDER, 0x0050 },
{ NAU8825_REG_FLL1, 0x0 },
{ NAU8825_REG_FLL2, 0x3126 },
{ NAU8825_REG_FLL3, 0x0008 },
{ NAU8825_REG_FLL4, 0x0010 },
{ NAU8825_REG_FLL5, 0x0 },
{ NAU8825_REG_FLL6, 0x6000 },
{ NAU8825_REG_FLL_VCO_RSV, 0xf13c },
{ NAU8825_REG_HSD_CTRL, 0x000c },
{ NAU8825_REG_JACK_DET_CTRL, 0x0 },
{ NAU8825_REG_INTERRUPT_MASK, 0x0 },
{ NAU8825_REG_INTERRUPT_DIS_CTRL, 0xffff },
{ NAU8825_REG_SAR_CTRL, 0x0015 },
{ NAU8825_REG_KEYDET_CTRL, 0x0110 },
{ NAU8825_REG_VDET_THRESHOLD_1, 0x0 },
{ NAU8825_REG_VDET_THRESHOLD_2, 0x0 },
{ NAU8825_REG_VDET_THRESHOLD_3, 0x0 },
{ NAU8825_REG_VDET_THRESHOLD_4, 0x0 },
{ NAU8825_REG_GPIO34_CTRL, 0x0 },
{ NAU8825_REG_GPIO12_CTRL, 0x0 },
{ NAU8825_REG_TDM_CTRL, 0x0 },
{ NAU8825_REG_I2S_PCM_CTRL1, 0x000b },
{ NAU8825_REG_I2S_PCM_CTRL2, 0x8010 },
{ NAU8825_REG_LEFT_TIME_SLOT, 0x0 },
{ NAU8825_REG_RIGHT_TIME_SLOT, 0x0 },
{ NAU8825_REG_BIQ_CTRL, 0x0 },
{ NAU8825_REG_BIQ_COF1, 0x0 },
{ NAU8825_REG_BIQ_COF2, 0x0 },
{ NAU8825_REG_BIQ_COF3, 0x0 },
{ NAU8825_REG_BIQ_COF4, 0x0 },
{ NAU8825_REG_BIQ_COF5, 0x0 },
{ NAU8825_REG_BIQ_COF6, 0x0 },
{ NAU8825_REG_BIQ_COF7, 0x0 },
{ NAU8825_REG_BIQ_COF8, 0x0 },
{ NAU8825_REG_BIQ_COF9, 0x0 },
{ NAU8825_REG_BIQ_COF10, 0x0 },
{ NAU8825_REG_ADC_RATE, 0x0010 },
{ NAU8825_REG_DAC_CTRL1, 0x0001 },
{ NAU8825_REG_DAC_CTRL2, 0x0 },
{ NAU8825_REG_DAC_DGAIN_CTRL, 0x0 },
{ NAU8825_REG_ADC_DGAIN_CTRL, 0x00cf },
{ NAU8825_REG_MUTE_CTRL, 0x0 },
{ NAU8825_REG_HSVOL_CTRL, 0x0 },
{ NAU8825_REG_DACL_CTRL, 0x02cf },
{ NAU8825_REG_DACR_CTRL, 0x00cf },
{ NAU8825_REG_ADC_DRC_KNEE_IP12, 0x1486 },
{ NAU8825_REG_ADC_DRC_KNEE_IP34, 0x0f12 },
{ NAU8825_REG_ADC_DRC_SLOPES, 0x25ff },
{ NAU8825_REG_ADC_DRC_ATKDCY, 0x3457 },
{ NAU8825_REG_DAC_DRC_KNEE_IP12, 0x1486 },
{ NAU8825_REG_DAC_DRC_KNEE_IP34, 0x0f12 },
{ NAU8825_REG_DAC_DRC_SLOPES, 0x25f9 },
{ NAU8825_REG_DAC_DRC_ATKDCY, 0x3457 },
{ NAU8825_REG_IMM_MODE_CTRL, 0x0 },
{ NAU8825_REG_CLASSG_CTRL, 0x0 },
{ NAU8825_REG_OPT_EFUSE_CTRL, 0x0 },
{ NAU8825_REG_MISC_CTRL, 0x0 },
{ NAU8825_REG_BIAS_ADJ, 0x0 },
{ NAU8825_REG_TRIM_SETTINGS, 0x0 },
{ NAU8825_REG_ANALOG_CONTROL_1, 0x0 },
{ NAU8825_REG_ANALOG_CONTROL_2, 0x0 },
{ NAU8825_REG_ANALOG_ADC_1, 0x0011 },
{ NAU8825_REG_ANALOG_ADC_2, 0x0020 },
{ NAU8825_REG_RDAC, 0x0008 },
{ NAU8825_REG_MIC_BIAS, 0x0006 },
{ NAU8825_REG_BOOST, 0x0 },
{ NAU8825_REG_FEPGA, 0x0 },
{ NAU8825_REG_POWER_UP_CONTROL, 0x0 },
{ NAU8825_REG_CHARGE_PUMP, 0x0 },
};
/* register backup table when cross talk detection */
static struct reg_default nau8825_xtalk_baktab[] = {
{ NAU8825_REG_ADC_DGAIN_CTRL, 0 },
{ NAU8825_REG_HSVOL_CTRL, 0 },
{ NAU8825_REG_DACL_CTRL, 0 },
{ NAU8825_REG_DACR_CTRL, 0 },
};
static const unsigned short logtable[256] = {
0x0000, 0x0171, 0x02e0, 0x044e, 0x05ba, 0x0725, 0x088e, 0x09f7,
0x0b5d, 0x0cc3, 0x0e27, 0x0f8a, 0x10eb, 0x124b, 0x13aa, 0x1508,
0x1664, 0x17bf, 0x1919, 0x1a71, 0x1bc8, 0x1d1e, 0x1e73, 0x1fc6,
0x2119, 0x226a, 0x23ba, 0x2508, 0x2656, 0x27a2, 0x28ed, 0x2a37,
0x2b80, 0x2cc8, 0x2e0f, 0x2f54, 0x3098, 0x31dc, 0x331e, 0x345f,
0x359f, 0x36de, 0x381b, 0x3958, 0x3a94, 0x3bce, 0x3d08, 0x3e41,
0x3f78, 0x40af, 0x41e4, 0x4319, 0x444c, 0x457f, 0x46b0, 0x47e1,
0x4910, 0x4a3f, 0x4b6c, 0x4c99, 0x4dc5, 0x4eef, 0x5019, 0x5142,
0x526a, 0x5391, 0x54b7, 0x55dc, 0x5700, 0x5824, 0x5946, 0x5a68,
0x5b89, 0x5ca8, 0x5dc7, 0x5ee5, 0x6003, 0x611f, 0x623a, 0x6355,
0x646f, 0x6588, 0x66a0, 0x67b7, 0x68ce, 0x69e4, 0x6af8, 0x6c0c,
0x6d20, 0x6e32, 0x6f44, 0x7055, 0x7165, 0x7274, 0x7383, 0x7490,
0x759d, 0x76aa, 0x77b5, 0x78c0, 0x79ca, 0x7ad3, 0x7bdb, 0x7ce3,
0x7dea, 0x7ef0, 0x7ff6, 0x80fb, 0x81ff, 0x8302, 0x8405, 0x8507,
0x8608, 0x8709, 0x8809, 0x8908, 0x8a06, 0x8b04, 0x8c01, 0x8cfe,
0x8dfa, 0x8ef5, 0x8fef, 0x90e9, 0x91e2, 0x92db, 0x93d2, 0x94ca,
0x95c0, 0x96b6, 0x97ab, 0x98a0, 0x9994, 0x9a87, 0x9b7a, 0x9c6c,
0x9d5e, 0x9e4f, 0x9f3f, 0xa02e, 0xa11e, 0xa20c, 0xa2fa, 0xa3e7,
0xa4d4, 0xa5c0, 0xa6ab, 0xa796, 0xa881, 0xa96a, 0xaa53, 0xab3c,
0xac24, 0xad0c, 0xadf2, 0xaed9, 0xafbe, 0xb0a4, 0xb188, 0xb26c,
0xb350, 0xb433, 0xb515, 0xb5f7, 0xb6d9, 0xb7ba, 0xb89a, 0xb97a,
0xba59, 0xbb38, 0xbc16, 0xbcf4, 0xbdd1, 0xbead, 0xbf8a, 0xc065,
0xc140, 0xc21b, 0xc2f5, 0xc3cf, 0xc4a8, 0xc580, 0xc658, 0xc730,
0xc807, 0xc8de, 0xc9b4, 0xca8a, 0xcb5f, 0xcc34, 0xcd08, 0xcddc,
0xceaf, 0xcf82, 0xd054, 0xd126, 0xd1f7, 0xd2c8, 0xd399, 0xd469,
0xd538, 0xd607, 0xd6d6, 0xd7a4, 0xd872, 0xd93f, 0xda0c, 0xdad9,
0xdba5, 0xdc70, 0xdd3b, 0xde06, 0xded0, 0xdf9a, 0xe063, 0xe12c,
0xe1f5, 0xe2bd, 0xe385, 0xe44c, 0xe513, 0xe5d9, 0xe69f, 0xe765,
0xe82a, 0xe8ef, 0xe9b3, 0xea77, 0xeb3b, 0xebfe, 0xecc1, 0xed83,
0xee45, 0xef06, 0xefc8, 0xf088, 0xf149, 0xf209, 0xf2c8, 0xf387,
0xf446, 0xf505, 0xf5c3, 0xf680, 0xf73e, 0xf7fb, 0xf8b7, 0xf973,
0xfa2f, 0xfaea, 0xfba5, 0xfc60, 0xfd1a, 0xfdd4, 0xfe8e, 0xff47
};
/**
* nau8825_sema_acquire - acquire the semaphore of nau88l25
* @nau8825: component to register the codec private data with
* @timeout: how long in jiffies to wait before failure or zero to wait
* until release
*
* Attempts to acquire the semaphore with number of jiffies. If no more
* tasks are allowed to acquire the semaphore, calling this function will
* put the task to sleep. If the semaphore is not released within the
* specified number of jiffies, this function returns.
* Acquires the semaphore without jiffies. If no more tasks are allowed
* to acquire the semaphore, calling this function will put the task to
* sleep until the semaphore is released.
* If the semaphore is not released within the specified number of jiffies,
* this function returns -ETIME.
* If the sleep is interrupted by a signal, this function will return -EINTR.
* It returns 0 if the semaphore was acquired successfully.
*/
static int nau8825_sema_acquire(struct nau8825 *nau8825, long timeout)
{
int ret;
if (timeout) {
ret = down_timeout(&nau8825->xtalk_sem, timeout);
if (ret < 0)
dev_warn(nau8825->dev, "Acquire semaphone timeout\n");
} else {
ret = down_interruptible(&nau8825->xtalk_sem);
if (ret < 0)
dev_warn(nau8825->dev, "Acquire semaphone fail\n");
}
return ret;
}
/**
* nau8825_sema_release - release the semaphore of nau88l25
* @nau8825: component to register the codec private data with
*
* Release the semaphore which may be called from any context and
* even by tasks which have never called down().
*/
static inline void nau8825_sema_release(struct nau8825 *nau8825)
{
up(&nau8825->xtalk_sem);
}
/**
* nau8825_sema_reset - reset the semaphore for nau88l25
* @nau8825: component to register the codec private data with
*
* Reset the counter of the semaphore. Call this function to restart
* a new round task management.
*/
static inline void nau8825_sema_reset(struct nau8825 *nau8825)
{
nau8825->xtalk_sem.count = 1;
}
/**
* Ramp up the headphone volume change gradually to target level.
*
* @nau8825: component to register the codec private data with
* @vol_from: the volume to start up
* @vol_to: the target volume
* @step: the volume span to move on
*
* The headphone volume is from 0dB to minimum -54dB and -1dB per step.
* If the volume changes sharp, there is a pop noise heard in headphone. We
* provide the function to ramp up the volume up or down by delaying 10ms
* per step.
*/
static void nau8825_hpvol_ramp(struct nau8825 *nau8825,
unsigned int vol_from, unsigned int vol_to, unsigned int step)
{
unsigned int value, volume, ramp_up, from, to;
if (vol_from == vol_to || step == 0) {
return;
} else if (vol_from < vol_to) {
ramp_up = true;
from = vol_from;
to = vol_to;
} else {
ramp_up = false;
from = vol_to;
to = vol_from;
}
/* only handle volume from 0dB to minimum -54dB */
if (to > NAU8825_HP_VOL_MIN)
to = NAU8825_HP_VOL_MIN;
for (volume = from; volume < to; volume += step) {
if (ramp_up)
value = volume;
else
value = to - volume + from;
regmap_update_bits(nau8825->regmap, NAU8825_REG_HSVOL_CTRL,
NAU8825_HPL_VOL_MASK | NAU8825_HPR_VOL_MASK,
(value << NAU8825_HPL_VOL_SFT) | value);
usleep_range(10000, 10500);
}
if (ramp_up)
value = to;
else
value = from;
regmap_update_bits(nau8825->regmap, NAU8825_REG_HSVOL_CTRL,
NAU8825_HPL_VOL_MASK | NAU8825_HPR_VOL_MASK,
(value << NAU8825_HPL_VOL_SFT) | value);
}
/**
* Computes log10 of a value; the result is round off to 3 decimal. This func-
* tion takes reference to dvb-math. The source code locates as the following.
* Linux/drivers/media/dvb-core/dvb_math.c
*
* return log10(value) * 1000
*/
static u32 nau8825_intlog10_dec3(u32 value)
{
u32 msb, logentry, significand, interpolation, log10val;
u64 log2val;
/* first detect the msb (count begins at 0) */
msb = fls(value) - 1;
/**
* now we use a logtable after the following method:
*
* log2(2^x * y) * 2^24 = x * 2^24 + log2(y) * 2^24
* where x = msb and therefore 1 <= y < 2
* first y is determined by shifting the value left
* so that msb is bit 31
* 0x00231f56 -> 0x8C7D5800
* the result is y * 2^31 -> "significand"
* then the highest 9 bits are used for a table lookup
* the highest bit is discarded because it's always set
* the highest nine bits in our example are 100011000
* so we would use the entry 0x18
*/
significand = value << (31 - msb);
logentry = (significand >> 23) & 0xff;
/**
* last step we do is interpolation because of the
* limitations of the log table the error is that part of
* the significand which isn't used for lookup then we
* compute the ratio between the error and the next table entry
* and interpolate it between the log table entry used and the
* next one the biggest error possible is 0x7fffff
* (in our example it's 0x7D5800)
* needed value for next table entry is 0x800000
* so the interpolation is
* (error / 0x800000) * (logtable_next - logtable_current)
* in the implementation the division is moved to the end for
* better accuracy there is also an overflow correction if
* logtable_next is 256
*/
interpolation = ((significand & 0x7fffff) *
((logtable[(logentry + 1) & 0xff] -
logtable[logentry]) & 0xffff)) >> 15;
log2val = ((msb << 24) + (logtable[logentry] << 8) + interpolation);
/**
* log10(x) = log2(x) * log10(2)
*/
log10val = (log2val * LOG10_MAGIC) >> 31;
/**
* the result is round off to 3 decimal
*/
return log10val / ((1 << 24) / 1000);
}
/**
* computes cross talk suppression sidetone gain.
*
* @sig_org: orignal signal level
* @sig_cros: cross talk signal level
*
* The orignal and cross talk signal vlues need to be characterized.
* Once these values have been characterized, this sidetone value
* can be converted to decibel with the equation below.
* sidetone = 20 * log (original signal level / crosstalk signal level)
*
* return cross talk sidetone gain
*/
static u32 nau8825_xtalk_sidetone(u32 sig_org, u32 sig_cros)
{
u32 gain, sidetone;
if (unlikely(sig_org == 0) || unlikely(sig_cros == 0)) {
WARN_ON(1);
return 0;
}
sig_org = nau8825_intlog10_dec3(sig_org);
sig_cros = nau8825_intlog10_dec3(sig_cros);
if (sig_org >= sig_cros)
gain = (sig_org - sig_cros) * 20 + GAIN_AUGMENT;
else
gain = (sig_cros - sig_org) * 20 + GAIN_AUGMENT;
sidetone = SIDETONE_BASE - gain * 2;
sidetone /= 1000;
return sidetone;
}
static int nau8825_xtalk_baktab_index_by_reg(unsigned int reg)
{
int index;
for (index = 0; index < ARRAY_SIZE(nau8825_xtalk_baktab); index++)
if (nau8825_xtalk_baktab[index].reg == reg)
return index;
return -EINVAL;
}
static void nau8825_xtalk_backup(struct nau8825 *nau8825)
{
int i;
/* Backup some register values to backup table */
for (i = 0; i < ARRAY_SIZE(nau8825_xtalk_baktab); i++)
regmap_read(nau8825->regmap, nau8825_xtalk_baktab[i].reg,
&nau8825_xtalk_baktab[i].def);
}
static void nau8825_xtalk_restore(struct nau8825 *nau8825)
{
int i, volume;
/* Restore register values from backup table; When the driver restores
* the headphone volumem, it needs recover to original level gradually
* with 3dB per step for less pop noise.
*/
for (i = 0; i < ARRAY_SIZE(nau8825_xtalk_baktab); i++) {
if (nau8825_xtalk_baktab[i].reg == NAU8825_REG_HSVOL_CTRL) {
/* Ramping up the volume change to reduce pop noise */
volume = nau8825_xtalk_baktab[i].def &
NAU8825_HPR_VOL_MASK;
nau8825_hpvol_ramp(nau8825, 0, volume, 3);
continue;
}
regmap_write(nau8825->regmap, nau8825_xtalk_baktab[i].reg,
nau8825_xtalk_baktab[i].def);
}
}
static void nau8825_xtalk_prepare_dac(struct nau8825 *nau8825)
{
/* Enable power of DAC path */
regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_DACR | NAU8825_ENABLE_DACL |
NAU8825_ENABLE_ADC | NAU8825_ENABLE_ADC_CLK |
NAU8825_ENABLE_DAC_CLK, NAU8825_ENABLE_DACR |
NAU8825_ENABLE_DACL | NAU8825_ENABLE_ADC |
NAU8825_ENABLE_ADC_CLK | NAU8825_ENABLE_DAC_CLK);
/* Prevent startup click by letting charge pump to ramp up and
* change bump enable
*/
regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_JAMNODCLOW | NAU8825_CHANRGE_PUMP_EN,
NAU8825_JAMNODCLOW | NAU8825_CHANRGE_PUMP_EN);
/* Enable clock sync of DAC and DAC clock */
regmap_update_bits(nau8825->regmap, NAU8825_REG_RDAC,
NAU8825_RDAC_EN | NAU8825_RDAC_CLK_EN |
NAU8825_RDAC_FS_BCLK_ENB,
NAU8825_RDAC_EN | NAU8825_RDAC_CLK_EN);
/* Power up output driver with 2 stage */
regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
NAU8825_POWERUP_INTEGR_R | NAU8825_POWERUP_INTEGR_L |
NAU8825_POWERUP_DRV_IN_R | NAU8825_POWERUP_DRV_IN_L,
NAU8825_POWERUP_INTEGR_R | NAU8825_POWERUP_INTEGR_L |
NAU8825_POWERUP_DRV_IN_R | NAU8825_POWERUP_DRV_IN_L);
regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
NAU8825_POWERUP_HP_DRV_R | NAU8825_POWERUP_HP_DRV_L,
NAU8825_POWERUP_HP_DRV_R | NAU8825_POWERUP_HP_DRV_L);
/* HP outputs not shouted to ground */
regmap_update_bits(nau8825->regmap, NAU8825_REG_HSD_CTRL,
NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L, 0);
/* Enable HP boost driver */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
NAU8825_HP_BOOST_DIS, NAU8825_HP_BOOST_DIS);
/* Enable class G compare path to supply 1.8V or 0.9V. */
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLASSG_CTRL,
NAU8825_CLASSG_LDAC_EN | NAU8825_CLASSG_RDAC_EN,
NAU8825_CLASSG_LDAC_EN | NAU8825_CLASSG_RDAC_EN);
}
static void nau8825_xtalk_prepare_adc(struct nau8825 *nau8825)
{
/* Power up left ADC and raise 5dB than Vmid for Vref */
regmap_update_bits(nau8825->regmap, NAU8825_REG_ANALOG_ADC_2,
NAU8825_POWERUP_ADCL | NAU8825_ADC_VREFSEL_MASK,
NAU8825_POWERUP_ADCL | NAU8825_ADC_VREFSEL_VMID_PLUS_0_5DB);
}
static void nau8825_xtalk_clock(struct nau8825 *nau8825)
{
/* Recover FLL default value */
regmap_write(nau8825->regmap, NAU8825_REG_FLL1, 0x0);
regmap_write(nau8825->regmap, NAU8825_REG_FLL2, 0x3126);
regmap_write(nau8825->regmap, NAU8825_REG_FLL3, 0x0008);
regmap_write(nau8825->regmap, NAU8825_REG_FLL4, 0x0010);
regmap_write(nau8825->regmap, NAU8825_REG_FLL5, 0x0);
regmap_write(nau8825->regmap, NAU8825_REG_FLL6, 0x6000);
/* Enable internal VCO clock for detection signal generated */
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6, NAU8825_DCO_EN,
NAU8825_DCO_EN);
/* Given specific clock frequency of internal clock to
* generate signal.
*/
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_MCLK_SRC_MASK, 0xf);
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL1,
NAU8825_FLL_RATIO_MASK, 0x10);
}
static void nau8825_xtalk_prepare(struct nau8825 *nau8825)
{
int volume, index;
/* Backup those registers changed by cross talk detection */
nau8825_xtalk_backup(nau8825);
/* Config IIS as master to output signal by codec */
regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
NAU8825_I2S_MS_MASK | NAU8825_I2S_LRC_DIV_MASK |
NAU8825_I2S_BLK_DIV_MASK, NAU8825_I2S_MS_MASTER |
(0x2 << NAU8825_I2S_LRC_DIV_SFT) | 0x1);
/* Ramp up headphone volume to 0dB to get better performance and
* avoid pop noise in headphone.
*/
index = nau8825_xtalk_baktab_index_by_reg(NAU8825_REG_HSVOL_CTRL);
if (index != -EINVAL) {
volume = nau8825_xtalk_baktab[index].def &
NAU8825_HPR_VOL_MASK;
nau8825_hpvol_ramp(nau8825, volume, 0, 3);
}
nau8825_xtalk_clock(nau8825);
nau8825_xtalk_prepare_dac(nau8825);
nau8825_xtalk_prepare_adc(nau8825);
/* Config channel path and digital gain */
regmap_update_bits(nau8825->regmap, NAU8825_REG_DACL_CTRL,
NAU8825_DACL_CH_SEL_MASK | NAU8825_DACL_CH_VOL_MASK,
NAU8825_DACL_CH_SEL_L | 0xab);
regmap_update_bits(nau8825->regmap, NAU8825_REG_DACR_CTRL,
NAU8825_DACR_CH_SEL_MASK | NAU8825_DACR_CH_VOL_MASK,
NAU8825_DACR_CH_SEL_R | 0xab);
/* Config cross talk parameters and generate the 23Hz sine wave with
* 1/16 full scale of signal level for impedance measurement.
*/
regmap_update_bits(nau8825->regmap, NAU8825_REG_IMM_MODE_CTRL,
NAU8825_IMM_THD_MASK | NAU8825_IMM_GEN_VOL_MASK |
NAU8825_IMM_CYC_MASK | NAU8825_IMM_DAC_SRC_MASK,
(0x9 << NAU8825_IMM_THD_SFT) | NAU8825_IMM_GEN_VOL_1_16th |
NAU8825_IMM_CYC_8192 | NAU8825_IMM_DAC_SRC_SIN);
/* RMS intrruption enable */
regmap_update_bits(nau8825->regmap,
NAU8825_REG_INTERRUPT_MASK, NAU8825_IRQ_RMS_EN, 0);
/* Power up left and right DAC */
regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL, 0);
}
static void nau8825_xtalk_clean_dac(struct nau8825 *nau8825)
{
/* Disable HP boost driver */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
NAU8825_HP_BOOST_DIS, 0);
/* HP outputs shouted to ground */
regmap_update_bits(nau8825->regmap, NAU8825_REG_HSD_CTRL,
NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L,
NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L);
/* Power down left and right DAC */
regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL,
NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL);
/* Enable the TESTDAC and disable L/R HP impedance */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_HPR_IMP | NAU8825_BIAS_HPL_IMP |
NAU8825_BIAS_TESTDAC_EN, NAU8825_BIAS_TESTDAC_EN);
/* Power down output driver with 2 stage */
regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
NAU8825_POWERUP_HP_DRV_R | NAU8825_POWERUP_HP_DRV_L, 0);
regmap_update_bits(nau8825->regmap, NAU8825_REG_POWER_UP_CONTROL,
NAU8825_POWERUP_INTEGR_R | NAU8825_POWERUP_INTEGR_L |
NAU8825_POWERUP_DRV_IN_R | NAU8825_POWERUP_DRV_IN_L, 0);
/* Disable clock sync of DAC and DAC clock */
regmap_update_bits(nau8825->regmap, NAU8825_REG_RDAC,
NAU8825_RDAC_EN | NAU8825_RDAC_CLK_EN, 0);
/* Disable charge pump ramp up function and change bump */
regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_JAMNODCLOW | NAU8825_CHANRGE_PUMP_EN, 0);
/* Disable power of DAC path */
regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_DACR | NAU8825_ENABLE_DACL |
NAU8825_ENABLE_ADC_CLK | NAU8825_ENABLE_DAC_CLK, 0);
if (!nau8825->irq)
regmap_update_bits(nau8825->regmap,
NAU8825_REG_ENA_CTRL, NAU8825_ENABLE_ADC, 0);
}
static void nau8825_xtalk_clean_adc(struct nau8825 *nau8825)
{
/* Power down left ADC and restore voltage to Vmid */
regmap_update_bits(nau8825->regmap, NAU8825_REG_ANALOG_ADC_2,
NAU8825_POWERUP_ADCL | NAU8825_ADC_VREFSEL_MASK, 0);
}
static void nau8825_xtalk_clean(struct nau8825 *nau8825)
{
/* Enable internal VCO needed for interruptions */
nau8825_configure_sysclk(nau8825, NAU8825_CLK_INTERNAL, 0);
nau8825_xtalk_clean_dac(nau8825);
nau8825_xtalk_clean_adc(nau8825);
/* Clear cross talk parameters and disable */
regmap_write(nau8825->regmap, NAU8825_REG_IMM_MODE_CTRL, 0);
/* RMS intrruption disable */
regmap_update_bits(nau8825->regmap, NAU8825_REG_INTERRUPT_MASK,
NAU8825_IRQ_RMS_EN, NAU8825_IRQ_RMS_EN);
/* Recover default value for IIS */
regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
NAU8825_I2S_MS_MASK | NAU8825_I2S_LRC_DIV_MASK |
NAU8825_I2S_BLK_DIV_MASK, NAU8825_I2S_MS_SLAVE);
/* Restore value of specific register for cross talk */
nau8825_xtalk_restore(nau8825);
}
static void nau8825_xtalk_imm_start(struct nau8825 *nau8825, int vol)
{
/* Apply ADC volume for better cross talk performance */
regmap_update_bits(nau8825->regmap, NAU8825_REG_ADC_DGAIN_CTRL,
NAU8825_ADC_DIG_VOL_MASK, vol);
/* Disables JKTIP(HPL) DAC channel for right to left measurement.
* Do it before sending signal in order to erase pop noise.
*/
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_TESTDACR_EN | NAU8825_BIAS_TESTDACL_EN,
NAU8825_BIAS_TESTDACL_EN);
switch (nau8825->xtalk_state) {
case NAU8825_XTALK_HPR_R2L:
/* Enable right headphone impedance */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_HPR_IMP | NAU8825_BIAS_HPL_IMP,
NAU8825_BIAS_HPR_IMP);
break;
case NAU8825_XTALK_HPL_R2L:
/* Enable left headphone impedance */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_HPR_IMP | NAU8825_BIAS_HPL_IMP,
NAU8825_BIAS_HPL_IMP);
break;
default:
break;
}
msleep(100);
/* Impedance measurement mode enable */
regmap_update_bits(nau8825->regmap, NAU8825_REG_IMM_MODE_CTRL,
NAU8825_IMM_EN, NAU8825_IMM_EN);
}
static void nau8825_xtalk_imm_stop(struct nau8825 *nau8825)
{
/* Impedance measurement mode disable */
regmap_update_bits(nau8825->regmap,
NAU8825_REG_IMM_MODE_CTRL, NAU8825_IMM_EN, 0);
}
/* The cross talk measurement function can reduce cross talk across the
* JKTIP(HPL) and JKR1(HPR) outputs which measures the cross talk signal
* level to determine what cross talk reduction gain is. This system works by
* sending a 23Hz -24dBV sine wave into the headset output DAC and through
* the PGA. The output of the PGA is then connected to an internal current
* sense which measures the attenuated 23Hz signal and passing the output to
* an ADC which converts the measurement to a binary code. With two separated
* measurement, one for JKR1(HPR) and the other JKTIP(HPL), measurement data
* can be separated read in IMM_RMS_L for HSR and HSL after each measurement.
* Thus, the measurement function has four states to complete whole sequence.
* 1. Prepare state : Prepare the resource for detection and transfer to HPR
* IMM stat to make JKR1(HPR) impedance measure.
* 2. HPR IMM state : Read out orignal signal level of JKR1(HPR) and transfer
* to HPL IMM state to make JKTIP(HPL) impedance measure.
* 3. HPL IMM state : Read out cross talk signal level of JKTIP(HPL) and
* transfer to IMM state to determine suppression sidetone gain.
* 4. IMM state : Computes cross talk suppression sidetone gain with orignal
* and cross talk signal level. Apply this gain and then restore codec
* configuration. Then transfer to Done state for ending.
*/
static void nau8825_xtalk_measure(struct nau8825 *nau8825)
{
u32 sidetone;
switch (nau8825->xtalk_state) {
case NAU8825_XTALK_PREPARE:
/* In prepare state, set up clock, intrruption, DAC path, ADC
* path and cross talk detection parameters for preparation.
*/
nau8825_xtalk_prepare(nau8825);
msleep(280);
/* Trigger right headphone impedance detection */
nau8825->xtalk_state = NAU8825_XTALK_HPR_R2L;
nau8825_xtalk_imm_start(nau8825, 0x00d2);
break;
case NAU8825_XTALK_HPR_R2L:
/* In right headphone IMM state, read out right headphone
* impedance measure result, and then start up left side.
*/
regmap_read(nau8825->regmap, NAU8825_REG_IMM_RMS_L,
&nau8825->imp_rms[NAU8825_XTALK_HPR_R2L]);
dev_dbg(nau8825->dev, "HPR_R2L imm: %x\n",
nau8825->imp_rms[NAU8825_XTALK_HPR_R2L]);
/* Disable then re-enable IMM mode to update */
nau8825_xtalk_imm_stop(nau8825);
/* Trigger left headphone impedance detection */
nau8825->xtalk_state = NAU8825_XTALK_HPL_R2L;
nau8825_xtalk_imm_start(nau8825, 0x00ff);
break;
case NAU8825_XTALK_HPL_R2L:
/* In left headphone IMM state, read out left headphone
* impedance measure result, and delay some time to wait
* detection sine wave output finish. Then, we can calculate
* the cross talk suppresstion side tone according to the L/R
* headphone imedance.
*/
regmap_read(nau8825->regmap, NAU8825_REG_IMM_RMS_L,
&nau8825->imp_rms[NAU8825_XTALK_HPL_R2L]);
dev_dbg(nau8825->dev, "HPL_R2L imm: %x\n",
nau8825->imp_rms[NAU8825_XTALK_HPL_R2L]);
nau8825_xtalk_imm_stop(nau8825);
msleep(150);
nau8825->xtalk_state = NAU8825_XTALK_IMM;
break;
case NAU8825_XTALK_IMM:
/* In impedance measure state, the orignal and cross talk
* signal level vlues are ready. The side tone gain is deter-
* mined with these signal level. After all, restore codec
* configuration.
*/
sidetone = nau8825_xtalk_sidetone(
nau8825->imp_rms[NAU8825_XTALK_HPR_R2L],
nau8825->imp_rms[NAU8825_XTALK_HPL_R2L]);
dev_dbg(nau8825->dev, "cross talk sidetone: %x\n", sidetone);
regmap_write(nau8825->regmap, NAU8825_REG_DAC_DGAIN_CTRL,
(sidetone << 8) | sidetone);
nau8825_xtalk_clean(nau8825);
nau8825->xtalk_state = NAU8825_XTALK_DONE;
break;
default:
break;
}
}
static void nau8825_xtalk_work(struct work_struct *work)
{
struct nau8825 *nau8825 = container_of(
work, struct nau8825, xtalk_work);
nau8825_xtalk_measure(nau8825);
/* To determine the cross talk side tone gain when reach
* the impedance measure state.
*/
if (nau8825->xtalk_state == NAU8825_XTALK_IMM)
nau8825_xtalk_measure(nau8825);
/* Delay jack report until cross talk detection process
* completed. It can avoid application to do playback
* preparation before cross talk detection is still working.
* Meanwhile, the protection of the cross talk detection
* is released.
*/
if (nau8825->xtalk_state == NAU8825_XTALK_DONE) {
snd_soc_jack_report(nau8825->jack, nau8825->xtalk_event,
nau8825->xtalk_event_mask);
nau8825_sema_release(nau8825);
nau8825->xtalk_protect = false;
}
}
static void nau8825_xtalk_cancel(struct nau8825 *nau8825)
{
/* If the xtalk_protect is true, that means the process is still
* on going. The driver forces to cancel the cross talk task and
* restores the configuration to original status.
*/
if (nau8825->xtalk_protect) {
cancel_work_sync(&nau8825->xtalk_work);
nau8825_xtalk_clean(nau8825);
}
/* Reset parameters for cross talk suppression function */
nau8825_sema_reset(nau8825);
nau8825->xtalk_state = NAU8825_XTALK_DONE;
nau8825->xtalk_protect = false;
}
static bool nau8825_readable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case NAU8825_REG_ENA_CTRL ... NAU8825_REG_FLL_VCO_RSV:
case NAU8825_REG_HSD_CTRL ... NAU8825_REG_JACK_DET_CTRL:
case NAU8825_REG_INTERRUPT_MASK ... NAU8825_REG_KEYDET_CTRL:
case NAU8825_REG_VDET_THRESHOLD_1 ... NAU8825_REG_DACR_CTRL:
case NAU8825_REG_ADC_DRC_KNEE_IP12 ... NAU8825_REG_ADC_DRC_ATKDCY:
case NAU8825_REG_DAC_DRC_KNEE_IP12 ... NAU8825_REG_DAC_DRC_ATKDCY:
case NAU8825_REG_IMM_MODE_CTRL ... NAU8825_REG_IMM_RMS_R:
case NAU8825_REG_CLASSG_CTRL ... NAU8825_REG_OPT_EFUSE_CTRL:
case NAU8825_REG_MISC_CTRL:
case NAU8825_REG_I2C_DEVICE_ID ... NAU8825_REG_SARDOUT_RAM_STATUS:
case NAU8825_REG_BIAS_ADJ:
case NAU8825_REG_TRIM_SETTINGS ... NAU8825_REG_ANALOG_CONTROL_2:
case NAU8825_REG_ANALOG_ADC_1 ... NAU8825_REG_MIC_BIAS:
case NAU8825_REG_BOOST ... NAU8825_REG_FEPGA:
case NAU8825_REG_POWER_UP_CONTROL ... NAU8825_REG_GENERAL_STATUS:
return true;
default:
return false;
}
}
static bool nau8825_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case NAU8825_REG_RESET ... NAU8825_REG_FLL_VCO_RSV:
case NAU8825_REG_HSD_CTRL ... NAU8825_REG_JACK_DET_CTRL:
case NAU8825_REG_INTERRUPT_MASK:
case NAU8825_REG_INT_CLR_KEY_STATUS ... NAU8825_REG_KEYDET_CTRL:
case NAU8825_REG_VDET_THRESHOLD_1 ... NAU8825_REG_DACR_CTRL:
case NAU8825_REG_ADC_DRC_KNEE_IP12 ... NAU8825_REG_ADC_DRC_ATKDCY:
case NAU8825_REG_DAC_DRC_KNEE_IP12 ... NAU8825_REG_DAC_DRC_ATKDCY:
case NAU8825_REG_IMM_MODE_CTRL:
case NAU8825_REG_CLASSG_CTRL ... NAU8825_REG_OPT_EFUSE_CTRL:
case NAU8825_REG_MISC_CTRL:
case NAU8825_REG_BIAS_ADJ:
case NAU8825_REG_TRIM_SETTINGS ... NAU8825_REG_ANALOG_CONTROL_2:
case NAU8825_REG_ANALOG_ADC_1 ... NAU8825_REG_MIC_BIAS:
case NAU8825_REG_BOOST ... NAU8825_REG_FEPGA:
case NAU8825_REG_POWER_UP_CONTROL ... NAU8825_REG_CHARGE_PUMP:
return true;
default:
return false;
}
}
static bool nau8825_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case NAU8825_REG_RESET:
case NAU8825_REG_IRQ_STATUS:
case NAU8825_REG_INT_CLR_KEY_STATUS:
case NAU8825_REG_IMM_RMS_L:
case NAU8825_REG_IMM_RMS_R:
case NAU8825_REG_I2C_DEVICE_ID:
case NAU8825_REG_SARDOUT_RAM_STATUS:
case NAU8825_REG_CHARGE_PUMP_INPUT_READ:
case NAU8825_REG_GENERAL_STATUS:
case NAU8825_REG_BIQ_CTRL ... NAU8825_REG_BIQ_COF10:
return true;
default:
return false;
}
}
static int nau8825_adc_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
switch (event) {
case SND_SOC_DAPM_POST_PMU:
regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC);
break;
case SND_SOC_DAPM_POST_PMD:
if (!nau8825->irq)
regmap_update_bits(nau8825->regmap,
NAU8825_REG_ENA_CTRL, NAU8825_ENABLE_ADC, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static int nau8825_pump_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
switch (event) {
case SND_SOC_DAPM_POST_PMU:
/* Prevent startup click by letting charge pump to ramp up */
msleep(10);
regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_JAMNODCLOW, NAU8825_JAMNODCLOW);
break;
case SND_SOC_DAPM_PRE_PMD:
regmap_update_bits(nau8825->regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_JAMNODCLOW, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static int nau8825_output_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
/* Disables the TESTDAC to let DAC signal pass through. */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_TESTDAC_EN, 0);
break;
case SND_SOC_DAPM_POST_PMD:
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_TESTDAC_EN, NAU8825_BIAS_TESTDAC_EN);
break;
default:
return -EINVAL;
}
return 0;
}
static int nau8825_biq_coeff_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct soc_bytes_ext *params = (void *)kcontrol->private_value;
if (!component->regmap)
return -EINVAL;
regmap_raw_read(component->regmap, NAU8825_REG_BIQ_COF1,
ucontrol->value.bytes.data, params->max);
return 0;
}
static int nau8825_biq_coeff_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct soc_bytes_ext *params = (void *)kcontrol->private_value;
void *data;
if (!component->regmap)
return -EINVAL;
data = kmemdup(ucontrol->value.bytes.data,
params->max, GFP_KERNEL | GFP_DMA);
if (!data)
return -ENOMEM;
regmap_update_bits(component->regmap, NAU8825_REG_BIQ_CTRL,
NAU8825_BIQ_WRT_EN, 0);
regmap_raw_write(component->regmap, NAU8825_REG_BIQ_COF1,
data, params->max);
regmap_update_bits(component->regmap, NAU8825_REG_BIQ_CTRL,
NAU8825_BIQ_WRT_EN, NAU8825_BIQ_WRT_EN);
kfree(data);
return 0;
}
static const char * const nau8825_biq_path[] = {
"ADC", "DAC"
};
static const struct soc_enum nau8825_biq_path_enum =
SOC_ENUM_SINGLE(NAU8825_REG_BIQ_CTRL, NAU8825_BIQ_PATH_SFT,
ARRAY_SIZE(nau8825_biq_path), nau8825_biq_path);
static const char * const nau8825_adc_decimation[] = {
"32", "64", "128", "256"
};
static const struct soc_enum nau8825_adc_decimation_enum =
SOC_ENUM_SINGLE(NAU8825_REG_ADC_RATE, NAU8825_ADC_SYNC_DOWN_SFT,
ARRAY_SIZE(nau8825_adc_decimation), nau8825_adc_decimation);
static const char * const nau8825_dac_oversampl[] = {
"64", "256", "128", "", "32"
};
static const struct soc_enum nau8825_dac_oversampl_enum =
SOC_ENUM_SINGLE(NAU8825_REG_DAC_CTRL1, NAU8825_DAC_OVERSAMPLE_SFT,
ARRAY_SIZE(nau8825_dac_oversampl), nau8825_dac_oversampl);
static const DECLARE_TLV_DB_MINMAX_MUTE(adc_vol_tlv, -10300, 2400);
static const DECLARE_TLV_DB_MINMAX_MUTE(sidetone_vol_tlv, -4200, 0);
static const DECLARE_TLV_DB_MINMAX(dac_vol_tlv, -5400, 0);
static const DECLARE_TLV_DB_MINMAX(fepga_gain_tlv, -100, 3600);
static const DECLARE_TLV_DB_MINMAX_MUTE(crosstalk_vol_tlv, -9600, 2400);
static const struct snd_kcontrol_new nau8825_controls[] = {
SOC_SINGLE_TLV("Mic Volume", NAU8825_REG_ADC_DGAIN_CTRL,
0, 0xff, 0, adc_vol_tlv),
SOC_DOUBLE_TLV("Headphone Bypass Volume", NAU8825_REG_ADC_DGAIN_CTRL,
12, 8, 0x0f, 0, sidetone_vol_tlv),
SOC_DOUBLE_TLV("Headphone Volume", NAU8825_REG_HSVOL_CTRL,
6, 0, 0x3f, 1, dac_vol_tlv),
SOC_SINGLE_TLV("Frontend PGA Volume", NAU8825_REG_POWER_UP_CONTROL,
8, 37, 0, fepga_gain_tlv),
SOC_DOUBLE_TLV("Headphone Crosstalk Volume", NAU8825_REG_DAC_DGAIN_CTRL,
0, 8, 0xff, 0, crosstalk_vol_tlv),
SOC_ENUM("ADC Decimation Rate", nau8825_adc_decimation_enum),
SOC_ENUM("DAC Oversampling Rate", nau8825_dac_oversampl_enum),
/* programmable biquad filter */
SOC_ENUM("BIQ Path Select", nau8825_biq_path_enum),
SND_SOC_BYTES_EXT("BIQ Coefficients", 20,
nau8825_biq_coeff_get, nau8825_biq_coeff_put),
};
/* DAC Mux 0x33[9] and 0x34[9] */
static const char * const nau8825_dac_src[] = {
"DACL", "DACR",
};
static SOC_ENUM_SINGLE_DECL(
nau8825_dacl_enum, NAU8825_REG_DACL_CTRL,
NAU8825_DACL_CH_SEL_SFT, nau8825_dac_src);
static SOC_ENUM_SINGLE_DECL(
nau8825_dacr_enum, NAU8825_REG_DACR_CTRL,
NAU8825_DACR_CH_SEL_SFT, nau8825_dac_src);
static const struct snd_kcontrol_new nau8825_dacl_mux =
SOC_DAPM_ENUM("DACL Source", nau8825_dacl_enum);
static const struct snd_kcontrol_new nau8825_dacr_mux =
SOC_DAPM_ENUM("DACR Source", nau8825_dacr_enum);
static const struct snd_soc_dapm_widget nau8825_dapm_widgets[] = {
SND_SOC_DAPM_AIF_OUT("AIFTX", "Capture", 0, NAU8825_REG_I2S_PCM_CTRL2,
15, 1),
SND_SOC_DAPM_INPUT("MIC"),
SND_SOC_DAPM_MICBIAS("MICBIAS", NAU8825_REG_MIC_BIAS, 8, 0),
SND_SOC_DAPM_PGA("Frontend PGA", NAU8825_REG_POWER_UP_CONTROL, 14, 0,
NULL, 0),
SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0,
nau8825_adc_event, SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("ADC Clock", NAU8825_REG_ENA_CTRL, 7, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("ADC Power", NAU8825_REG_ANALOG_ADC_2, 6, 0, NULL,
0),
/* ADC for button press detection. A dapm supply widget is used to
* prevent dapm_power_widgets keeping the codec at SND_SOC_BIAS_ON
* during suspend.
*/
SND_SOC_DAPM_SUPPLY("SAR", NAU8825_REG_SAR_CTRL,
NAU8825_SAR_ADC_EN_SFT, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("ADACL", 2, NAU8825_REG_RDAC, 12, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("ADACR", 2, NAU8825_REG_RDAC, 13, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("ADACL Clock", 3, NAU8825_REG_RDAC, 8, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("ADACR Clock", 3, NAU8825_REG_RDAC, 9, 0, NULL, 0),
SND_SOC_DAPM_DAC("DDACR", NULL, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_DACR_SFT, 0),
SND_SOC_DAPM_DAC("DDACL", NULL, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_DACL_SFT, 0),
SND_SOC_DAPM_SUPPLY("DDAC Clock", NAU8825_REG_ENA_CTRL, 6, 0, NULL, 0),
SND_SOC_DAPM_MUX("DACL Mux", SND_SOC_NOPM, 0, 0, &nau8825_dacl_mux),
SND_SOC_DAPM_MUX("DACR Mux", SND_SOC_NOPM, 0, 0, &nau8825_dacr_mux),
SND_SOC_DAPM_PGA_S("HP amp L", 0,
NAU8825_REG_CLASSG_CTRL, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("HP amp R", 0,
NAU8825_REG_CLASSG_CTRL, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Charge Pump", 1, NAU8825_REG_CHARGE_PUMP, 5, 0,
nau8825_pump_event, SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_PGA_S("Output Driver R Stage 1", 4,
NAU8825_REG_POWER_UP_CONTROL, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Output Driver L Stage 1", 4,
NAU8825_REG_POWER_UP_CONTROL, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Output Driver R Stage 2", 5,
NAU8825_REG_POWER_UP_CONTROL, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Output Driver L Stage 2", 5,
NAU8825_REG_POWER_UP_CONTROL, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Output Driver R Stage 3", 6,
NAU8825_REG_POWER_UP_CONTROL, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Output Driver L Stage 3", 6,
NAU8825_REG_POWER_UP_CONTROL, 0, 0, NULL, 0),
SND_SOC_DAPM_PGA_S("Output DACL", 7,
NAU8825_REG_CHARGE_PUMP, 8, 1, nau8825_output_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_PGA_S("Output DACR", 7,
NAU8825_REG_CHARGE_PUMP, 9, 1, nau8825_output_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
/* HPOL/R are ungrounded by disabling 16 Ohm pull-downs on playback */
SND_SOC_DAPM_PGA_S("HPOL Pulldown", 8,
NAU8825_REG_HSD_CTRL, 0, 1, NULL, 0),
SND_SOC_DAPM_PGA_S("HPOR Pulldown", 8,
NAU8825_REG_HSD_CTRL, 1, 1, NULL, 0),
/* High current HPOL/R boost driver */
SND_SOC_DAPM_PGA_S("HP Boost Driver", 9,
NAU8825_REG_BOOST, 9, 1, NULL, 0),
/* Class G operation control*/
SND_SOC_DAPM_PGA_S("Class G", 10,
NAU8825_REG_CLASSG_CTRL, 0, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("HPOL"),
SND_SOC_DAPM_OUTPUT("HPOR"),
};
static const struct snd_soc_dapm_route nau8825_dapm_routes[] = {
{"Frontend PGA", NULL, "MIC"},
{"ADC", NULL, "Frontend PGA"},
{"ADC", NULL, "ADC Clock"},
{"ADC", NULL, "ADC Power"},
{"AIFTX", NULL, "ADC"},
{"DDACL", NULL, "Playback"},
{"DDACR", NULL, "Playback"},
{"DDACL", NULL, "DDAC Clock"},
{"DDACR", NULL, "DDAC Clock"},
{"DACL Mux", "DACL", "DDACL"},
{"DACL Mux", "DACR", "DDACR"},
{"DACR Mux", "DACL", "DDACL"},
{"DACR Mux", "DACR", "DDACR"},
{"HP amp L", NULL, "DACL Mux"},
{"HP amp R", NULL, "DACR Mux"},
{"Charge Pump", NULL, "HP amp L"},
{"Charge Pump", NULL, "HP amp R"},
{"ADACL", NULL, "Charge Pump"},
{"ADACR", NULL, "Charge Pump"},
{"ADACL Clock", NULL, "ADACL"},
{"ADACR Clock", NULL, "ADACR"},
{"Output Driver L Stage 1", NULL, "ADACL Clock"},
{"Output Driver R Stage 1", NULL, "ADACR Clock"},
{"Output Driver L Stage 2", NULL, "Output Driver L Stage 1"},
{"Output Driver R Stage 2", NULL, "Output Driver R Stage 1"},
{"Output Driver L Stage 3", NULL, "Output Driver L Stage 2"},
{"Output Driver R Stage 3", NULL, "Output Driver R Stage 2"},
{"Output DACL", NULL, "Output Driver L Stage 3"},
{"Output DACR", NULL, "Output Driver R Stage 3"},
{"HPOL Pulldown", NULL, "Output DACL"},
{"HPOR Pulldown", NULL, "Output DACR"},
{"HP Boost Driver", NULL, "HPOL Pulldown"},
{"HP Boost Driver", NULL, "HPOR Pulldown"},
{"Class G", NULL, "HP Boost Driver"},
{"HPOL", NULL, "Class G"},
{"HPOR", NULL, "Class G"},
};
static int nau8825_clock_check(struct nau8825 *nau8825,
int stream, int rate, int osr)
{
int osrate;
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (osr >= ARRAY_SIZE(osr_dac_sel))
return -EINVAL;
osrate = osr_dac_sel[osr].osr;
} else {
if (osr >= ARRAY_SIZE(osr_adc_sel))
return -EINVAL;
osrate = osr_adc_sel[osr].osr;
}
if (!osrate || rate * osr > CLK_DA_AD_MAX) {
dev_err(nau8825->dev, "exceed the maximum frequency of CLK_ADC or CLK_DAC\n");
return -EINVAL;
}
return 0;
}
static int nau8825_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
unsigned int val_len = 0, osr, ctrl_val, bclk_fs, bclk_div;
nau8825_sema_acquire(nau8825, 3 * HZ);
/* CLK_DAC or CLK_ADC = OSR * FS
* DAC or ADC clock frequency is defined as Over Sampling Rate (OSR)
* multiplied by the audio sample rate (Fs). Note that the OSR and Fs
* values must be selected such that the maximum frequency is less
* than 6.144 MHz.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
regmap_read(nau8825->regmap, NAU8825_REG_DAC_CTRL1, &osr);
osr &= NAU8825_DAC_OVERSAMPLE_MASK;
if (nau8825_clock_check(nau8825, substream->stream,
params_rate(params), osr))
return -EINVAL;
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_DAC_SRC_MASK,
osr_dac_sel[osr].clk_src << NAU8825_CLK_DAC_SRC_SFT);
} else {
regmap_read(nau8825->regmap, NAU8825_REG_ADC_RATE, &osr);
osr &= NAU8825_ADC_SYNC_DOWN_MASK;
if (nau8825_clock_check(nau8825, substream->stream,
params_rate(params), osr))
return -EINVAL;
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_ADC_SRC_MASK,
osr_adc_sel[osr].clk_src << NAU8825_CLK_ADC_SRC_SFT);
}
/* make BCLK and LRC divde configuration if the codec as master. */
regmap_read(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2, &ctrl_val);
if (ctrl_val & NAU8825_I2S_MS_MASTER) {
/* get the bclk and fs ratio */
bclk_fs = snd_soc_params_to_bclk(params) / params_rate(params);
if (bclk_fs <= 32)
bclk_div = 2;
else if (bclk_fs <= 64)
bclk_div = 1;
else if (bclk_fs <= 128)
bclk_div = 0;
else
return -EINVAL;
regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
NAU8825_I2S_LRC_DIV_MASK | NAU8825_I2S_BLK_DIV_MASK,
((bclk_div + 1) << NAU8825_I2S_LRC_DIV_SFT) | bclk_div);
}
switch (params_width(params)) {
case 16:
val_len |= NAU8825_I2S_DL_16;
break;
case 20:
val_len |= NAU8825_I2S_DL_20;
break;
case 24:
val_len |= NAU8825_I2S_DL_24;
break;
case 32:
val_len |= NAU8825_I2S_DL_32;
break;
default:
return -EINVAL;
}
regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1,
NAU8825_I2S_DL_MASK, val_len);
/* Release the semaphone. */
nau8825_sema_release(nau8825);
return 0;
}
static int nau8825_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
unsigned int ctrl1_val = 0, ctrl2_val = 0;
nau8825_sema_acquire(nau8825, 3 * HZ);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
ctrl2_val |= NAU8825_I2S_MS_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_NF:
ctrl1_val |= NAU8825_I2S_BP_INV;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
ctrl1_val |= NAU8825_I2S_DF_I2S;
break;
case SND_SOC_DAIFMT_LEFT_J:
ctrl1_val |= NAU8825_I2S_DF_LEFT;
break;
case SND_SOC_DAIFMT_RIGHT_J:
ctrl1_val |= NAU8825_I2S_DF_RIGTH;
break;
case SND_SOC_DAIFMT_DSP_A:
ctrl1_val |= NAU8825_I2S_DF_PCM_AB;
break;
case SND_SOC_DAIFMT_DSP_B:
ctrl1_val |= NAU8825_I2S_DF_PCM_AB;
ctrl1_val |= NAU8825_I2S_PCMB_EN;
break;
default:
return -EINVAL;
}
regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL1,
NAU8825_I2S_DL_MASK | NAU8825_I2S_DF_MASK |
NAU8825_I2S_BP_MASK | NAU8825_I2S_PCMB_MASK,
ctrl1_val);
regmap_update_bits(nau8825->regmap, NAU8825_REG_I2S_PCM_CTRL2,
NAU8825_I2S_MS_MASK, ctrl2_val);
/* Release the semaphone. */
nau8825_sema_release(nau8825);
return 0;
}
static const struct snd_soc_dai_ops nau8825_dai_ops = {
.hw_params = nau8825_hw_params,
.set_fmt = nau8825_set_dai_fmt,
};
#define NAU8825_RATES SNDRV_PCM_RATE_8000_192000
#define NAU8825_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE \
| SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_driver nau8825_dai = {
.name = "nau8825-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = NAU8825_RATES,
.formats = NAU8825_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 1,
.rates = NAU8825_RATES,
.formats = NAU8825_FORMATS,
},
.ops = &nau8825_dai_ops,
};
/**
* nau8825_enable_jack_detect - Specify a jack for event reporting
*
* @component: component to register the jack with
* @jack: jack to use to report headset and button events on
*
* After this function has been called the headset insert/remove and button
* events will be routed to the given jack. Jack can be null to stop
* reporting.
*/
int nau8825_enable_jack_detect(struct snd_soc_codec *codec,
struct snd_soc_jack *jack)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
struct regmap *regmap = nau8825->regmap;
nau8825->jack = jack;
/* Ground HP Outputs[1:0], needed for headset auto detection
* Enable Automatic Mic/Gnd switching reading on insert interrupt[6]
*/
regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL,
NAU8825_HSD_AUTO_MODE | NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L,
NAU8825_HSD_AUTO_MODE | NAU8825_SPKR_DWN1R | NAU8825_SPKR_DWN1L);
return 0;
}
EXPORT_SYMBOL_GPL(nau8825_enable_jack_detect);
static bool nau8825_is_jack_inserted(struct regmap *regmap)
{
bool active_high, is_high;
int status, jkdet;
regmap_read(regmap, NAU8825_REG_JACK_DET_CTRL, &jkdet);
active_high = jkdet & NAU8825_JACK_POLARITY;
regmap_read(regmap, NAU8825_REG_I2C_DEVICE_ID, &status);
is_high = status & NAU8825_GPIO2JD1;
/* return jack connection status according to jack insertion logic
* active high or active low.
*/
return active_high == is_high;
}
static void nau8825_restart_jack_detection(struct regmap *regmap)
{
/* this will restart the entire jack detection process including MIC/GND
* switching and create interrupts. We have to go from 0 to 1 and back
* to 0 to restart.
*/
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_DET_RESTART, NAU8825_JACK_DET_RESTART);
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_DET_RESTART, 0);
}
static void nau8825_int_status_clear_all(struct regmap *regmap)
{
int active_irq, clear_irq, i;
/* Reset the intrruption status from rightmost bit if the corres-
* ponding irq event occurs.
*/
regmap_read(regmap, NAU8825_REG_IRQ_STATUS, &active_irq);
for (i = 0; i < NAU8825_REG_DATA_LEN; i++) {
clear_irq = (0x1 << i);
if (active_irq & clear_irq)
regmap_write(regmap,
NAU8825_REG_INT_CLR_KEY_STATUS, clear_irq);
}
}
static void nau8825_eject_jack(struct nau8825 *nau8825)
{
struct snd_soc_dapm_context *dapm = nau8825->dapm;
struct regmap *regmap = nau8825->regmap;
/* Force to cancel the cross talk detection process */
nau8825_xtalk_cancel(nau8825);
snd_soc_dapm_disable_pin(dapm, "SAR");
snd_soc_dapm_disable_pin(dapm, "MICBIAS");
/* Detach 2kOhm Resistors from MICBIAS to MICGND1/2 */
regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2, 0);
/* ground HPL/HPR, MICGRND1/2 */
regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 0xf, 0xf);
snd_soc_dapm_sync(dapm);
/* Clear all interruption status */
nau8825_int_status_clear_all(regmap);
/* Enable the insertion interruption, disable the ejection inter-
* ruption, and then bypass de-bounce circuit.
*/
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_DIS_CTRL,
NAU8825_IRQ_EJECT_DIS | NAU8825_IRQ_INSERT_DIS,
NAU8825_IRQ_EJECT_DIS);
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_EJECT_EN |
NAU8825_IRQ_HEADSET_COMPLETE_EN | NAU8825_IRQ_INSERT_EN,
NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_EJECT_EN |
NAU8825_IRQ_HEADSET_COMPLETE_EN);
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_DET_DB_BYPASS, NAU8825_JACK_DET_DB_BYPASS);
/* Disable ADC needed for interruptions at audo mode */
regmap_update_bits(regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_ADC, 0);
/* Close clock for jack type detection at manual mode */
nau8825_configure_sysclk(nau8825, NAU8825_CLK_DIS, 0);
}
/* Enable audo mode interruptions with internal clock. */
static void nau8825_setup_auto_irq(struct nau8825 *nau8825)
{
struct regmap *regmap = nau8825->regmap;
/* Enable headset jack type detection complete interruption and
* jack ejection interruption.
*/
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
NAU8825_IRQ_HEADSET_COMPLETE_EN | NAU8825_IRQ_EJECT_EN, 0);
/* Enable internal VCO needed for interruptions */
nau8825_configure_sysclk(nau8825, NAU8825_CLK_INTERNAL, 0);
/* Enable ADC needed for interruptions */
regmap_update_bits(regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC);
/* Chip needs one FSCLK cycle in order to generate interruptions,
* as we cannot guarantee one will be provided by the system. Turning
* master mode on then off enables us to generate that FSCLK cycle
* with a minimum of contention on the clock bus.
*/
regmap_update_bits(regmap, NAU8825_REG_I2S_PCM_CTRL2,
NAU8825_I2S_MS_MASK, NAU8825_I2S_MS_MASTER);
regmap_update_bits(regmap, NAU8825_REG_I2S_PCM_CTRL2,
NAU8825_I2S_MS_MASK, NAU8825_I2S_MS_SLAVE);
/* Not bypass de-bounce circuit */
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_DET_DB_BYPASS, 0);
/* Unmask all interruptions */
regmap_write(regmap, NAU8825_REG_INTERRUPT_DIS_CTRL, 0);
/* Restart the jack detection process at auto mode */
nau8825_restart_jack_detection(regmap);
}
static int nau8825_button_decode(int value)
{
int buttons = 0;
/* The chip supports up to 8 buttons, but ALSA defines only 6 buttons */
if (value & BIT(0))
buttons |= SND_JACK_BTN_0;
if (value & BIT(1))
buttons |= SND_JACK_BTN_1;
if (value & BIT(2))
buttons |= SND_JACK_BTN_2;
if (value & BIT(3))
buttons |= SND_JACK_BTN_3;
if (value & BIT(4))
buttons |= SND_JACK_BTN_4;
if (value & BIT(5))
buttons |= SND_JACK_BTN_5;
return buttons;
}
static int nau8825_jack_insert(struct nau8825 *nau8825)
{
struct regmap *regmap = nau8825->regmap;
struct snd_soc_dapm_context *dapm = nau8825->dapm;
int jack_status_reg, mic_detected;
int type = 0;
regmap_read(regmap, NAU8825_REG_GENERAL_STATUS, &jack_status_reg);
mic_detected = (jack_status_reg >> 10) & 3;
/* The JKSLV and JKR2 all detected in high impedance headset */
if (mic_detected == 0x3)
nau8825->high_imped = true;
else
nau8825->high_imped = false;
switch (mic_detected) {
case 0:
/* no mic */
type = SND_JACK_HEADPHONE;
break;
case 1:
dev_dbg(nau8825->dev, "OMTP (micgnd1) mic connected\n");
type = SND_JACK_HEADSET;
/* Unground MICGND1 */
regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 3 << 2,
1 << 2);
/* Attach 2kOhm Resistor from MICBIAS to MICGND1 */
regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2,
NAU8825_MICBIAS_JKR2);
/* Attach SARADC to MICGND1 */
regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
NAU8825_SAR_INPUT_MASK,
NAU8825_SAR_INPUT_JKR2);
snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
snd_soc_dapm_force_enable_pin(dapm, "SAR");
snd_soc_dapm_sync(dapm);
break;
case 2:
case 3:
dev_dbg(nau8825->dev, "CTIA (micgnd2) mic connected\n");
type = SND_JACK_HEADSET;
/* Unground MICGND2 */
regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, 3 << 2,
2 << 2);
/* Attach 2kOhm Resistor from MICBIAS to MICGND2 */
regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
NAU8825_MICBIAS_JKSLV | NAU8825_MICBIAS_JKR2,
NAU8825_MICBIAS_JKSLV);
/* Attach SARADC to MICGND2 */
regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
NAU8825_SAR_INPUT_MASK,
NAU8825_SAR_INPUT_JKSLV);
snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
snd_soc_dapm_force_enable_pin(dapm, "SAR");
snd_soc_dapm_sync(dapm);
break;
}
/* Leaving HPOL/R grounded after jack insert by default. They will be
* ungrounded as part of the widget power up sequence at the beginning
* of playback to reduce pop.
*/
return type;
}
#define NAU8825_BUTTONS (SND_JACK_BTN_0 | SND_JACK_BTN_1 | \
SND_JACK_BTN_2 | SND_JACK_BTN_3)
static irqreturn_t nau8825_interrupt(int irq, void *data)
{
struct nau8825 *nau8825 = (struct nau8825 *)data;
struct regmap *regmap = nau8825->regmap;
int active_irq, clear_irq = 0, event = 0, event_mask = 0;
if (regmap_read(regmap, NAU8825_REG_IRQ_STATUS, &active_irq)) {
dev_err(nau8825->dev, "failed to read irq status\n");
return IRQ_NONE;
}
if ((active_irq & NAU8825_JACK_EJECTION_IRQ_MASK) ==
NAU8825_JACK_EJECTION_DETECTED) {
nau8825_eject_jack(nau8825);
event_mask |= SND_JACK_HEADSET;
clear_irq = NAU8825_JACK_EJECTION_IRQ_MASK;
} else if (active_irq & NAU8825_KEY_SHORT_PRESS_IRQ) {
int key_status;
regmap_read(regmap, NAU8825_REG_INT_CLR_KEY_STATUS,
&key_status);
/* upper 8 bits of the register are for short pressed keys,
* lower 8 bits - for long pressed buttons
*/
nau8825->button_pressed = nau8825_button_decode(
key_status >> 8);
event |= nau8825->button_pressed;
event_mask |= NAU8825_BUTTONS;
clear_irq = NAU8825_KEY_SHORT_PRESS_IRQ;
} else if (active_irq & NAU8825_KEY_RELEASE_IRQ) {
event_mask = NAU8825_BUTTONS;
clear_irq = NAU8825_KEY_RELEASE_IRQ;
} else if (active_irq & NAU8825_HEADSET_COMPLETION_IRQ) {
if (nau8825_is_jack_inserted(regmap)) {
event |= nau8825_jack_insert(nau8825);
if (!nau8825->high_imped) {
/* Apply the cross talk suppression in the
* headset without high impedance.
*/
if (!nau8825->xtalk_protect) {
/* Raise protection for cross talk de-
* tection if no protection before.
* The driver has to cancel the pro-
* cess and restore changes if process
* is ongoing when ejection.
*/
int ret;
nau8825->xtalk_protect = true;
ret = nau8825_sema_acquire(nau8825, 0);
if (ret < 0)
nau8825->xtalk_protect = false;
}
/* Startup cross talk detection process */
nau8825->xtalk_state = NAU8825_XTALK_PREPARE;
schedule_work(&nau8825->xtalk_work);
} else {
/* The cross talk suppression shouldn't apply
* in the headset with high impedance. Thus,
* relieve the protection raised before.
*/
if (nau8825->xtalk_protect) {
nau8825_sema_release(nau8825);
nau8825->xtalk_protect = false;
}
}
} else {
dev_warn(nau8825->dev, "Headset completion IRQ fired but no headset connected\n");
nau8825_eject_jack(nau8825);
}
event_mask |= SND_JACK_HEADSET;
clear_irq = NAU8825_HEADSET_COMPLETION_IRQ;
/* Record the interruption report event for driver to report
* the event later. The jack report will delay until cross
* talk detection process is done.
*/
if (nau8825->xtalk_state == NAU8825_XTALK_PREPARE) {
nau8825->xtalk_event = event;
nau8825->xtalk_event_mask = event_mask;
}
} else if (active_irq & NAU8825_IMPEDANCE_MEAS_IRQ) {
schedule_work(&nau8825->xtalk_work);
clear_irq = NAU8825_IMPEDANCE_MEAS_IRQ;
} else if ((active_irq & NAU8825_JACK_INSERTION_IRQ_MASK) ==
NAU8825_JACK_INSERTION_DETECTED) {
/* One more step to check GPIO status directly. Thus, the
* driver can confirm the real insertion interruption because
* the intrruption at manual mode has bypassed debounce
* circuit which can get rid of unstable status.
*/
if (nau8825_is_jack_inserted(regmap)) {
/* Turn off insertion interruption at manual mode */
regmap_update_bits(regmap,
NAU8825_REG_INTERRUPT_DIS_CTRL,
NAU8825_IRQ_INSERT_DIS,
NAU8825_IRQ_INSERT_DIS);
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
NAU8825_IRQ_INSERT_EN, NAU8825_IRQ_INSERT_EN);
/* Enable interruption for jack type detection at audo
* mode which can detect microphone and jack type.
*/
nau8825_setup_auto_irq(nau8825);
}
}
if (!clear_irq)
clear_irq = active_irq;
/* clears the rightmost interruption */
regmap_write(regmap, NAU8825_REG_INT_CLR_KEY_STATUS, clear_irq);
/* Delay jack report until cross talk detection is done. It can avoid
* application to do playback preparation when cross talk detection
* process is still working. Otherwise, the resource like clock and
* power will be issued by them at the same time and conflict happens.
*/
if (event_mask && nau8825->xtalk_state == NAU8825_XTALK_DONE)
snd_soc_jack_report(nau8825->jack, event, event_mask);
return IRQ_HANDLED;
}
static void nau8825_setup_buttons(struct nau8825 *nau8825)
{
struct regmap *regmap = nau8825->regmap;
regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
NAU8825_SAR_TRACKING_GAIN_MASK,
nau8825->sar_voltage << NAU8825_SAR_TRACKING_GAIN_SFT);
regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
NAU8825_SAR_COMPARE_TIME_MASK,
nau8825->sar_compare_time << NAU8825_SAR_COMPARE_TIME_SFT);
regmap_update_bits(regmap, NAU8825_REG_SAR_CTRL,
NAU8825_SAR_SAMPLING_TIME_MASK,
nau8825->sar_sampling_time << NAU8825_SAR_SAMPLING_TIME_SFT);
regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
NAU8825_KEYDET_LEVELS_NR_MASK,
(nau8825->sar_threshold_num - 1) << NAU8825_KEYDET_LEVELS_NR_SFT);
regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
NAU8825_KEYDET_HYSTERESIS_MASK,
nau8825->sar_hysteresis << NAU8825_KEYDET_HYSTERESIS_SFT);
regmap_update_bits(regmap, NAU8825_REG_KEYDET_CTRL,
NAU8825_KEYDET_SHORTKEY_DEBOUNCE_MASK,
nau8825->key_debounce << NAU8825_KEYDET_SHORTKEY_DEBOUNCE_SFT);
regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_1,
(nau8825->sar_threshold[0] << 8) | nau8825->sar_threshold[1]);
regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_2,
(nau8825->sar_threshold[2] << 8) | nau8825->sar_threshold[3]);
regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_3,
(nau8825->sar_threshold[4] << 8) | nau8825->sar_threshold[5]);
regmap_write(regmap, NAU8825_REG_VDET_THRESHOLD_4,
(nau8825->sar_threshold[6] << 8) | nau8825->sar_threshold[7]);
/* Enable short press and release interruptions */
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
NAU8825_IRQ_KEY_SHORT_PRESS_EN | NAU8825_IRQ_KEY_RELEASE_EN,
0);
}
static void nau8825_init_regs(struct nau8825 *nau8825)
{
struct regmap *regmap = nau8825->regmap;
/* Latch IIC LSB value */
regmap_write(regmap, NAU8825_REG_IIC_ADDR_SET, 0x0001);
/* Enable Bias/Vmid */
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_VMID, NAU8825_BIAS_VMID);
regmap_update_bits(nau8825->regmap, NAU8825_REG_BOOST,
NAU8825_GLOBAL_BIAS_EN, NAU8825_GLOBAL_BIAS_EN);
/* VMID Tieoff */
regmap_update_bits(regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_VMID_SEL_MASK,
nau8825->vref_impedance << NAU8825_BIAS_VMID_SEL_SFT);
/* Disable Boost Driver, Automatic Short circuit protection enable */
regmap_update_bits(regmap, NAU8825_REG_BOOST,
NAU8825_PRECHARGE_DIS | NAU8825_HP_BOOST_DIS |
NAU8825_HP_BOOST_G_DIS | NAU8825_SHORT_SHUTDOWN_EN,
NAU8825_PRECHARGE_DIS | NAU8825_HP_BOOST_DIS |
NAU8825_HP_BOOST_G_DIS | NAU8825_SHORT_SHUTDOWN_EN);
regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
NAU8825_JKDET_OUTPUT_EN,
nau8825->jkdet_enable ? 0 : NAU8825_JKDET_OUTPUT_EN);
regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
NAU8825_JKDET_PULL_EN,
nau8825->jkdet_pull_enable ? 0 : NAU8825_JKDET_PULL_EN);
regmap_update_bits(regmap, NAU8825_REG_GPIO12_CTRL,
NAU8825_JKDET_PULL_UP,
nau8825->jkdet_pull_up ? NAU8825_JKDET_PULL_UP : 0);
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_POLARITY,
/* jkdet_polarity - 1 is for active-low */
nau8825->jkdet_polarity ? 0 : NAU8825_JACK_POLARITY);
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_INSERT_DEBOUNCE_MASK,
nau8825->jack_insert_debounce << NAU8825_JACK_INSERT_DEBOUNCE_SFT);
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_EJECT_DEBOUNCE_MASK,
nau8825->jack_eject_debounce << NAU8825_JACK_EJECT_DEBOUNCE_SFT);
/* Mask unneeded IRQs: 1 - disable, 0 - enable */
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK, 0x7ff, 0x7ff);
regmap_update_bits(regmap, NAU8825_REG_MIC_BIAS,
NAU8825_MICBIAS_VOLTAGE_MASK, nau8825->micbias_voltage);
if (nau8825->sar_threshold_num)
nau8825_setup_buttons(nau8825);
/* Default oversampling/decimations settings are unusable
* (audible hiss). Set it to something better.
*/
regmap_update_bits(regmap, NAU8825_REG_ADC_RATE,
NAU8825_ADC_SYNC_DOWN_MASK | NAU8825_ADC_SINC4_EN,
NAU8825_ADC_SYNC_DOWN_64);
regmap_update_bits(regmap, NAU8825_REG_DAC_CTRL1,
NAU8825_DAC_OVERSAMPLE_MASK, NAU8825_DAC_OVERSAMPLE_64);
/* Disable DACR/L power */
regmap_update_bits(regmap, NAU8825_REG_CHARGE_PUMP,
NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL,
NAU8825_POWER_DOWN_DACR | NAU8825_POWER_DOWN_DACL);
/* Enable TESTDAC. This sets the analog DAC inputs to a '0' input
* signal to avoid any glitches due to power up transients in both
* the analog and digital DAC circuit.
*/
regmap_update_bits(nau8825->regmap, NAU8825_REG_BIAS_ADJ,
NAU8825_BIAS_TESTDAC_EN, NAU8825_BIAS_TESTDAC_EN);
/* CICCLP off */
regmap_update_bits(regmap, NAU8825_REG_DAC_CTRL1,
NAU8825_DAC_CLIP_OFF, NAU8825_DAC_CLIP_OFF);
/* Class AB bias current to 2x, DAC Capacitor enable MSB/LSB */
regmap_update_bits(regmap, NAU8825_REG_ANALOG_CONTROL_2,
NAU8825_HP_NON_CLASSG_CURRENT_2xADJ |
NAU8825_DAC_CAPACITOR_MSB | NAU8825_DAC_CAPACITOR_LSB,
NAU8825_HP_NON_CLASSG_CURRENT_2xADJ |
NAU8825_DAC_CAPACITOR_MSB | NAU8825_DAC_CAPACITOR_LSB);
/* Class G timer 64ms */
regmap_update_bits(regmap, NAU8825_REG_CLASSG_CTRL,
NAU8825_CLASSG_TIMER_MASK,
0x20 << NAU8825_CLASSG_TIMER_SFT);
/* DAC clock delay 2ns, VREF */
regmap_update_bits(regmap, NAU8825_REG_RDAC,
NAU8825_RDAC_CLK_DELAY_MASK | NAU8825_RDAC_VREF_MASK,
(0x2 << NAU8825_RDAC_CLK_DELAY_SFT) |
(0x3 << NAU8825_RDAC_VREF_SFT));
/* Config L/R channel */
regmap_update_bits(nau8825->regmap, NAU8825_REG_DACL_CTRL,
NAU8825_DACL_CH_SEL_MASK, NAU8825_DACL_CH_SEL_L);
regmap_update_bits(nau8825->regmap, NAU8825_REG_DACR_CTRL,
NAU8825_DACL_CH_SEL_MASK, NAU8825_DACL_CH_SEL_R);
/* Disable short Frame Sync detection logic */
regmap_update_bits(regmap, NAU8825_REG_LEFT_TIME_SLOT,
NAU8825_DIS_FS_SHORT_DET, NAU8825_DIS_FS_SHORT_DET);
}
static const struct regmap_config nau8825_regmap_config = {
.val_bits = NAU8825_REG_DATA_LEN,
.reg_bits = NAU8825_REG_ADDR_LEN,
.max_register = NAU8825_REG_MAX,
.readable_reg = nau8825_readable_reg,
.writeable_reg = nau8825_writeable_reg,
.volatile_reg = nau8825_volatile_reg,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = nau8825_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(nau8825_reg_defaults),
};
static int nau8825_codec_probe(struct snd_soc_codec *codec)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
nau8825->dapm = dapm;
return 0;
}
static int nau8825_codec_remove(struct snd_soc_codec *codec)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
/* Cancel and reset cross tak suppresstion detection funciton */
nau8825_xtalk_cancel(nau8825);
return 0;
}
/**
* nau8825_calc_fll_param - Calculate FLL parameters.
* @fll_in: external clock provided to codec.
* @fs: sampling rate.
* @fll_param: Pointer to structure of FLL parameters.
*
* Calculate FLL parameters to configure codec.
*
* Returns 0 for success or negative error code.
*/
static int nau8825_calc_fll_param(unsigned int fll_in, unsigned int fs,
struct nau8825_fll *fll_param)
{
u64 fvco, fvco_max;
unsigned int fref, i, fvco_sel;
/* Ensure the reference clock frequency (FREF) is <= 13.5MHz by dividing
* freq_in by 1, 2, 4, or 8 using FLL pre-scalar.
* FREF = freq_in / NAU8825_FLL_REF_DIV_MASK
*/
for (i = 0; i < ARRAY_SIZE(fll_pre_scalar); i++) {
fref = fll_in / fll_pre_scalar[i].param;
if (fref <= NAU_FREF_MAX)
break;
}
if (i == ARRAY_SIZE(fll_pre_scalar))
return -EINVAL;
fll_param->clk_ref_div = fll_pre_scalar[i].val;
/* Choose the FLL ratio based on FREF */
for (i = 0; i < ARRAY_SIZE(fll_ratio); i++) {
if (fref >= fll_ratio[i].param)
break;
}
if (i == ARRAY_SIZE(fll_ratio))
return -EINVAL;
fll_param->ratio = fll_ratio[i].val;
/* Calculate the frequency of DCO (FDCO) given freq_out = 256 * Fs.
* FDCO must be within the 90MHz - 124MHz or the FFL cannot be
* guaranteed across the full range of operation.
* FDCO = freq_out * 2 * mclk_src_scaling
*/
fvco_max = 0;
fvco_sel = ARRAY_SIZE(mclk_src_scaling);
for (i = 0; i < ARRAY_SIZE(mclk_src_scaling); i++) {
fvco = 256 * fs * 2 * mclk_src_scaling[i].param;
if (fvco > NAU_FVCO_MIN && fvco < NAU_FVCO_MAX &&
fvco_max < fvco) {
fvco_max = fvco;
fvco_sel = i;
}
}
if (ARRAY_SIZE(mclk_src_scaling) == fvco_sel)
return -EINVAL;
fll_param->mclk_src = mclk_src_scaling[fvco_sel].val;
/* Calculate the FLL 10-bit integer input and the FLL 16-bit fractional
* input based on FDCO, FREF and FLL ratio.
*/
fvco = div_u64(fvco_max << 16, fref * fll_param->ratio);
fll_param->fll_int = (fvco >> 16) & 0x3FF;
fll_param->fll_frac = fvco & 0xFFFF;
return 0;
}
static void nau8825_fll_apply(struct nau8825 *nau8825,
struct nau8825_fll *fll_param)
{
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_SRC_MASK | NAU8825_CLK_MCLK_SRC_MASK,
NAU8825_CLK_SRC_MCLK | fll_param->mclk_src);
/* Make DSP operate at high speed for better performance. */
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL1,
NAU8825_FLL_RATIO_MASK | NAU8825_ICTRL_LATCH_MASK,
fll_param->ratio | (0x6 << NAU8825_ICTRL_LATCH_SFT));
/* FLL 16-bit fractional input */
regmap_write(nau8825->regmap, NAU8825_REG_FLL2, fll_param->fll_frac);
/* FLL 10-bit integer input */
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL3,
NAU8825_FLL_INTEGER_MASK, fll_param->fll_int);
/* FLL pre-scaler */
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL4,
NAU8825_FLL_REF_DIV_MASK,
fll_param->clk_ref_div << NAU8825_FLL_REF_DIV_SFT);
/* select divided VCO input */
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
NAU8825_FLL_CLK_SW_MASK, NAU8825_FLL_CLK_SW_REF);
/* Disable free-running mode */
regmap_update_bits(nau8825->regmap,
NAU8825_REG_FLL6, NAU8825_DCO_EN, 0);
if (fll_param->fll_frac) {
/* set FLL loop filter enable and cutoff frequency at 500Khz */
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
NAU8825_FLL_PDB_DAC_EN | NAU8825_FLL_LOOP_FTR_EN |
NAU8825_FLL_FTR_SW_MASK,
NAU8825_FLL_PDB_DAC_EN | NAU8825_FLL_LOOP_FTR_EN |
NAU8825_FLL_FTR_SW_FILTER);
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6,
NAU8825_SDM_EN | NAU8825_CUTOFF500,
NAU8825_SDM_EN | NAU8825_CUTOFF500);
} else {
/* disable FLL loop filter and cutoff frequency */
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL5,
NAU8825_FLL_PDB_DAC_EN | NAU8825_FLL_LOOP_FTR_EN |
NAU8825_FLL_FTR_SW_MASK, NAU8825_FLL_FTR_SW_ACCU);
regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL6,
NAU8825_SDM_EN | NAU8825_CUTOFF500, 0);
}
}
/* freq_out must be 256*Fs in order to achieve the best performance */
static int nau8825_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
unsigned int freq_in, unsigned int freq_out)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
struct nau8825_fll fll_param;
int ret, fs;
fs = freq_out / 256;
ret = nau8825_calc_fll_param(freq_in, fs, &fll_param);
if (ret < 0) {
dev_err(codec->dev, "Unsupported input clock %d\n", freq_in);
return ret;
}
dev_dbg(codec->dev, "mclk_src=%x ratio=%x fll_frac=%x fll_int=%x clk_ref_div=%x\n",
fll_param.mclk_src, fll_param.ratio, fll_param.fll_frac,
fll_param.fll_int, fll_param.clk_ref_div);
nau8825_fll_apply(nau8825, &fll_param);
mdelay(2);
regmap_update_bits(nau8825->regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
return 0;
}
static int nau8825_mclk_prepare(struct nau8825 *nau8825, unsigned int freq)
{
int ret = 0;
nau8825->mclk = devm_clk_get(nau8825->dev, "mclk");
if (IS_ERR(nau8825->mclk)) {
dev_info(nau8825->dev, "No 'mclk' clock found, assume MCLK is managed externally");
return 0;
}
if (!nau8825->mclk_freq) {
ret = clk_prepare_enable(nau8825->mclk);
if (ret) {
dev_err(nau8825->dev, "Unable to prepare codec mclk\n");
return ret;
}
}
if (nau8825->mclk_freq != freq) {
freq = clk_round_rate(nau8825->mclk, freq);
ret = clk_set_rate(nau8825->mclk, freq);
if (ret) {
dev_err(nau8825->dev, "Unable to set mclk rate\n");
return ret;
}
nau8825->mclk_freq = freq;
}
return 0;
}
static void nau8825_configure_mclk_as_sysclk(struct regmap *regmap)
{
regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_MCLK);
regmap_update_bits(regmap, NAU8825_REG_FLL6,
NAU8825_DCO_EN, 0);
/* Make DSP operate as default setting for power saving. */
regmap_update_bits(regmap, NAU8825_REG_FLL1,
NAU8825_ICTRL_LATCH_MASK, 0);
}
static int nau8825_configure_sysclk(struct nau8825 *nau8825, int clk_id,
unsigned int freq)
{
struct regmap *regmap = nau8825->regmap;
int ret;
switch (clk_id) {
case NAU8825_CLK_DIS:
/* Clock provided externally and disable internal VCO clock */
nau8825_configure_mclk_as_sysclk(regmap);
if (nau8825->mclk_freq) {
clk_disable_unprepare(nau8825->mclk);
nau8825->mclk_freq = 0;
}
break;
case NAU8825_CLK_MCLK:
/* Acquire the semaphone to synchronize the playback and
* interrupt handler. In order to avoid the playback inter-
* fered by cross talk process, the driver make the playback
* preparation halted until cross talk process finish.
*/
nau8825_sema_acquire(nau8825, 3 * HZ);
nau8825_configure_mclk_as_sysclk(regmap);
/* MCLK not changed by clock tree */
regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_MCLK_SRC_MASK, 0);
/* Release the semaphone. */
nau8825_sema_release(nau8825);
ret = nau8825_mclk_prepare(nau8825, freq);
if (ret)
return ret;
break;
case NAU8825_CLK_INTERNAL:
if (nau8825_is_jack_inserted(nau8825->regmap)) {
regmap_update_bits(regmap, NAU8825_REG_FLL6,
NAU8825_DCO_EN, NAU8825_DCO_EN);
regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_SRC_MASK, NAU8825_CLK_SRC_VCO);
/* Decrease the VCO frequency and make DSP operate
* as default setting for power saving.
*/
regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
NAU8825_CLK_MCLK_SRC_MASK, 0xf);
regmap_update_bits(regmap, NAU8825_REG_FLL1,
NAU8825_ICTRL_LATCH_MASK |
NAU8825_FLL_RATIO_MASK, 0x10);
regmap_update_bits(regmap, NAU8825_REG_FLL6,
NAU8825_SDM_EN, NAU8825_SDM_EN);
} else {
/* The clock turns off intentionally for power saving
* when no headset connected.
*/
nau8825_configure_mclk_as_sysclk(regmap);
dev_warn(nau8825->dev, "Disable clock for power saving when no headset connected\n");
}
if (nau8825->mclk_freq) {
clk_disable_unprepare(nau8825->mclk);
nau8825->mclk_freq = 0;
}
break;
case NAU8825_CLK_FLL_MCLK:
/* Acquire the semaphone to synchronize the playback and
* interrupt handler. In order to avoid the playback inter-
* fered by cross talk process, the driver make the playback
* preparation halted until cross talk process finish.
*/
nau8825_sema_acquire(nau8825, 3 * HZ);
/* Higher FLL reference input frequency can only set lower
* gain error, such as 0000 for input reference from MCLK
* 12.288Mhz.
*/
regmap_update_bits(regmap, NAU8825_REG_FLL3,
NAU8825_FLL_CLK_SRC_MASK | NAU8825_GAIN_ERR_MASK,
NAU8825_FLL_CLK_SRC_MCLK | 0);
/* Release the semaphone. */
nau8825_sema_release(nau8825);
ret = nau8825_mclk_prepare(nau8825, freq);
if (ret)
return ret;
break;
case NAU8825_CLK_FLL_BLK:
/* Acquire the semaphone to synchronize the playback and
* interrupt handler. In order to avoid the playback inter-
* fered by cross talk process, the driver make the playback
* preparation halted until cross talk process finish.
*/
nau8825_sema_acquire(nau8825, 3 * HZ);
/* If FLL reference input is from low frequency source,
* higher error gain can apply such as 0xf which has
* the most sensitive gain error correction threshold,
* Therefore, FLL has the most accurate DCO to
* target frequency.
*/
regmap_update_bits(regmap, NAU8825_REG_FLL3,
NAU8825_FLL_CLK_SRC_MASK | NAU8825_GAIN_ERR_MASK,
NAU8825_FLL_CLK_SRC_BLK |
(0xf << NAU8825_GAIN_ERR_SFT));
/* Release the semaphone. */
nau8825_sema_release(nau8825);
if (nau8825->mclk_freq) {
clk_disable_unprepare(nau8825->mclk);
nau8825->mclk_freq = 0;
}
break;
case NAU8825_CLK_FLL_FS:
/* Acquire the semaphone to synchronize the playback and
* interrupt handler. In order to avoid the playback inter-
* fered by cross talk process, the driver make the playback
* preparation halted until cross talk process finish.
*/
nau8825_sema_acquire(nau8825, 3 * HZ);
/* If FLL reference input is from low frequency source,
* higher error gain can apply such as 0xf which has
* the most sensitive gain error correction threshold,
* Therefore, FLL has the most accurate DCO to
* target frequency.
*/
regmap_update_bits(regmap, NAU8825_REG_FLL3,
NAU8825_FLL_CLK_SRC_MASK | NAU8825_GAIN_ERR_MASK,
NAU8825_FLL_CLK_SRC_FS |
(0xf << NAU8825_GAIN_ERR_SFT));
/* Release the semaphone. */
nau8825_sema_release(nau8825);
if (nau8825->mclk_freq) {
clk_disable_unprepare(nau8825->mclk);
nau8825->mclk_freq = 0;
}
break;
default:
dev_err(nau8825->dev, "Invalid clock id (%d)\n", clk_id);
return -EINVAL;
}
dev_dbg(nau8825->dev, "Sysclk is %dHz and clock id is %d\n", freq,
clk_id);
return 0;
}
static int nau8825_set_sysclk(struct snd_soc_codec *codec, int clk_id,
int source, unsigned int freq, int dir)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
return nau8825_configure_sysclk(nau8825, clk_id, freq);
}
static int nau8825_resume_setup(struct nau8825 *nau8825)
{
struct regmap *regmap = nau8825->regmap;
/* Close clock when jack type detection at manual mode */
nau8825_configure_sysclk(nau8825, NAU8825_CLK_DIS, 0);
/* Clear all interruption status */
nau8825_int_status_clear_all(regmap);
/* Enable both insertion and ejection interruptions, and then
* bypass de-bounce circuit.
*/
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_MASK,
NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_HEADSET_COMPLETE_EN |
NAU8825_IRQ_EJECT_EN | NAU8825_IRQ_INSERT_EN,
NAU8825_IRQ_OUTPUT_EN | NAU8825_IRQ_HEADSET_COMPLETE_EN);
regmap_update_bits(regmap, NAU8825_REG_JACK_DET_CTRL,
NAU8825_JACK_DET_DB_BYPASS, NAU8825_JACK_DET_DB_BYPASS);
regmap_update_bits(regmap, NAU8825_REG_INTERRUPT_DIS_CTRL,
NAU8825_IRQ_INSERT_DIS | NAU8825_IRQ_EJECT_DIS, 0);
return 0;
}
static int nau8825_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
if (nau8825->mclk_freq) {
ret = clk_prepare_enable(nau8825->mclk);
if (ret) {
dev_err(nau8825->dev, "Unable to prepare codec mclk\n");
return ret;
}
}
/* Setup codec configuration after resume */
nau8825_resume_setup(nau8825);
}
break;
case SND_SOC_BIAS_OFF:
/* Cancel and reset cross talk detection funciton */
nau8825_xtalk_cancel(nau8825);
/* Turn off all interruptions before system shutdown. Keep the
* interruption quiet before resume setup completes.
*/
regmap_write(nau8825->regmap,
NAU8825_REG_INTERRUPT_DIS_CTRL, 0xffff);
/* Disable ADC needed for interruptions at audo mode */
regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL,
NAU8825_ENABLE_ADC, 0);
if (nau8825->mclk_freq)
clk_disable_unprepare(nau8825->mclk);
break;
}
return 0;
}
static int __maybe_unused nau8825_suspend(struct snd_soc_codec *codec)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
disable_irq(nau8825->irq);
snd_soc_codec_force_bias_level(codec, SND_SOC_BIAS_OFF);
regcache_cache_only(nau8825->regmap, true);
regcache_mark_dirty(nau8825->regmap);
return 0;
}
static int __maybe_unused nau8825_resume(struct snd_soc_codec *codec)
{
struct nau8825 *nau8825 = snd_soc_codec_get_drvdata(codec);
int ret;
regcache_cache_only(nau8825->regmap, false);
regcache_sync(nau8825->regmap);
nau8825->xtalk_protect = true;
ret = nau8825_sema_acquire(nau8825, 0);
if (ret < 0)
nau8825->xtalk_protect = false;
enable_irq(nau8825->irq);
return 0;
}
static struct snd_soc_codec_driver nau8825_codec_driver = {
.probe = nau8825_codec_probe,
.remove = nau8825_codec_remove,
.set_sysclk = nau8825_set_sysclk,
.set_pll = nau8825_set_pll,
.set_bias_level = nau8825_set_bias_level,
.suspend_bias_off = true,
.suspend = nau8825_suspend,
.resume = nau8825_resume,
.component_driver = {
.controls = nau8825_controls,
.num_controls = ARRAY_SIZE(nau8825_controls),
.dapm_widgets = nau8825_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(nau8825_dapm_widgets),
.dapm_routes = nau8825_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(nau8825_dapm_routes),
},
};
static void nau8825_reset_chip(struct regmap *regmap)
{
regmap_write(regmap, NAU8825_REG_RESET, 0x00);
regmap_write(regmap, NAU8825_REG_RESET, 0x00);
}
static void nau8825_print_device_properties(struct nau8825 *nau8825)
{
int i;
struct device *dev = nau8825->dev;
dev_dbg(dev, "jkdet-enable: %d\n", nau8825->jkdet_enable);
dev_dbg(dev, "jkdet-pull-enable: %d\n", nau8825->jkdet_pull_enable);
dev_dbg(dev, "jkdet-pull-up: %d\n", nau8825->jkdet_pull_up);
dev_dbg(dev, "jkdet-polarity: %d\n", nau8825->jkdet_polarity);
dev_dbg(dev, "micbias-voltage: %d\n", nau8825->micbias_voltage);
dev_dbg(dev, "vref-impedance: %d\n", nau8825->vref_impedance);
dev_dbg(dev, "sar-threshold-num: %d\n", nau8825->sar_threshold_num);
for (i = 0; i < nau8825->sar_threshold_num; i++)
dev_dbg(dev, "sar-threshold[%d]=%d\n", i,
nau8825->sar_threshold[i]);
dev_dbg(dev, "sar-hysteresis: %d\n", nau8825->sar_hysteresis);
dev_dbg(dev, "sar-voltage: %d\n", nau8825->sar_voltage);
dev_dbg(dev, "sar-compare-time: %d\n", nau8825->sar_compare_time);
dev_dbg(dev, "sar-sampling-time: %d\n", nau8825->sar_sampling_time);
dev_dbg(dev, "short-key-debounce: %d\n", nau8825->key_debounce);
dev_dbg(dev, "jack-insert-debounce: %d\n",
nau8825->jack_insert_debounce);
dev_dbg(dev, "jack-eject-debounce: %d\n",
nau8825->jack_eject_debounce);
}
static int nau8825_read_device_properties(struct device *dev,
struct nau8825 *nau8825) {
nau8825->jkdet_enable = device_property_read_bool(dev,
"nuvoton,jkdet-enable");
nau8825->jkdet_pull_enable = device_property_read_bool(dev,
"nuvoton,jkdet-pull-enable");
nau8825->jkdet_pull_up = device_property_read_bool(dev,
"nuvoton,jkdet-pull-up");
device_property_read_u32(dev, "nuvoton,jkdet-polarity",
&nau8825->jkdet_polarity);
device_property_read_u32(dev, "nuvoton,micbias-voltage",
&nau8825->micbias_voltage);
device_property_read_u32(dev, "nuvoton,vref-impedance",
&nau8825->vref_impedance);
device_property_read_u32(dev, "nuvoton,sar-threshold-num",
&nau8825->sar_threshold_num);
device_property_read_u32_array(dev, "nuvoton,sar-threshold",
nau8825->sar_threshold, nau8825->sar_threshold_num);
device_property_read_u32(dev, "nuvoton,sar-hysteresis",
&nau8825->sar_hysteresis);
device_property_read_u32(dev, "nuvoton,sar-voltage",
&nau8825->sar_voltage);
device_property_read_u32(dev, "nuvoton,sar-compare-time",
&nau8825->sar_compare_time);
device_property_read_u32(dev, "nuvoton,sar-sampling-time",
&nau8825->sar_sampling_time);
device_property_read_u32(dev, "nuvoton,short-key-debounce",
&nau8825->key_debounce);
device_property_read_u32(dev, "nuvoton,jack-insert-debounce",
&nau8825->jack_insert_debounce);
device_property_read_u32(dev, "nuvoton,jack-eject-debounce",
&nau8825->jack_eject_debounce);
nau8825->mclk = devm_clk_get(dev, "mclk");
if (PTR_ERR(nau8825->mclk) == -EPROBE_DEFER) {
return -EPROBE_DEFER;
} else if (PTR_ERR(nau8825->mclk) == -ENOENT) {
/* The MCLK is managed externally or not used at all */
nau8825->mclk = NULL;
dev_info(dev, "No 'mclk' clock found, assume MCLK is managed externally");
} else if (IS_ERR(nau8825->mclk)) {
return -EINVAL;
}
return 0;
}
static int nau8825_setup_irq(struct nau8825 *nau8825)
{
int ret;
ret = devm_request_threaded_irq(nau8825->dev, nau8825->irq, NULL,
nau8825_interrupt, IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"nau8825", nau8825);
if (ret) {
dev_err(nau8825->dev, "Cannot request irq %d (%d)\n",
nau8825->irq, ret);
return ret;
}
return 0;
}
static int nau8825_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct device *dev = &i2c->dev;
struct nau8825 *nau8825 = dev_get_platdata(&i2c->dev);
int ret, value;
if (!nau8825) {
nau8825 = devm_kzalloc(dev, sizeof(*nau8825), GFP_KERNEL);
if (!nau8825)
return -ENOMEM;
ret = nau8825_read_device_properties(dev, nau8825);
if (ret)
return ret;
}
i2c_set_clientdata(i2c, nau8825);
nau8825->regmap = devm_regmap_init_i2c(i2c, &nau8825_regmap_config);
if (IS_ERR(nau8825->regmap))
return PTR_ERR(nau8825->regmap);
nau8825->dev = dev;
nau8825->irq = i2c->irq;
/* Initiate parameters, semaphone and work queue which are needed in
* cross talk suppression measurment function.
*/
nau8825->xtalk_state = NAU8825_XTALK_DONE;
nau8825->xtalk_protect = false;
sema_init(&nau8825->xtalk_sem, 1);
INIT_WORK(&nau8825->xtalk_work, nau8825_xtalk_work);
nau8825_print_device_properties(nau8825);
nau8825_reset_chip(nau8825->regmap);
ret = regmap_read(nau8825->regmap, NAU8825_REG_I2C_DEVICE_ID, &value);
if (ret < 0) {
dev_err(dev, "Failed to read device id from the NAU8825: %d\n",
ret);
return ret;
}
if ((value & NAU8825_SOFTWARE_ID_MASK) !=
NAU8825_SOFTWARE_ID_NAU8825) {
dev_err(dev, "Not a NAU8825 chip\n");
return -ENODEV;
}
nau8825_init_regs(nau8825);
if (i2c->irq)
nau8825_setup_irq(nau8825);
return snd_soc_register_codec(&i2c->dev, &nau8825_codec_driver,
&nau8825_dai, 1);
}
static int nau8825_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id nau8825_i2c_ids[] = {
{ "nau8825", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, nau8825_i2c_ids);
#ifdef CONFIG_OF
static const struct of_device_id nau8825_of_ids[] = {
{ .compatible = "nuvoton,nau8825", },
{}
};
MODULE_DEVICE_TABLE(of, nau8825_of_ids);
#endif
#ifdef CONFIG_ACPI
static const struct acpi_device_id nau8825_acpi_match[] = {
{ "10508825", 0 },
{},
};
MODULE_DEVICE_TABLE(acpi, nau8825_acpi_match);
#endif
static struct i2c_driver nau8825_driver = {
.driver = {
.name = "nau8825",
.of_match_table = of_match_ptr(nau8825_of_ids),
.acpi_match_table = ACPI_PTR(nau8825_acpi_match),
},
.probe = nau8825_i2c_probe,
.remove = nau8825_i2c_remove,
.id_table = nau8825_i2c_ids,
};
module_i2c_driver(nau8825_driver);
MODULE_DESCRIPTION("ASoC nau8825 driver");
MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>");
MODULE_LICENSE("GPL");
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