#include <linux/clk.h>
#include <linux/acpi.h>
#include <linux/math64.h>
+#include <linux/semaphore.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#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
+
+
static int nau8825_configure_sysclk(struct nau8825 *nau8825,
int clk_id, unsigned int freq);
{ 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
+};
+
+static struct snd_soc_dai *nau8825_get_codec_dai(struct nau8825 *nau8825)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_to_codec(nau8825->dapm);
+ struct snd_soc_component *component = &codec->component;
+ struct snd_soc_dai *codec_dai, *_dai;
+
+ list_for_each_entry_safe(codec_dai, _dai, &component->dai_list, list) {
+ if (!strncmp(codec_dai->name, NUVOTON_CODEC_DAI,
+ strlen(NUVOTON_CODEC_DAI)))
+ return codec_dai;
+ }
+ return NULL;
+}
+
+static bool nau8825_dai_is_active(struct nau8825 *nau8825)
+{
+ struct snd_soc_dai *codec_dai = nau8825_get_codec_dai(nau8825);
+
+ if (codec_dai) {
+ if (codec_dai->playback_active || codec_dai->capture_active)
+ return true;
+ }
+ return false;
+}
+
+/**
+ * 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.
+ * It returns if the semaphore was acquired.
+ */
+static void nau8825_sema_acquire(struct nau8825 *nau8825, long timeout)
+{
+ int ret;
+
+ if (timeout)
+ ret = down_timeout(&nau8825->xtalk_sem, timeout);
+ else
+ ret = down_interruptible(&nau8825->xtalk_sem);
+
+ if (ret < 0)
+ dev_warn(nau8825->dev, "Acquire semaphone fail\n");
+}
+
+/**
+ * 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_DRV_MASK |
+ NAU8825_I2S_BLK_DIV_MASK, NAU8825_I2S_MS_MASTER |
+ (0x2 << NAU8825_I2S_DRV_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_DRV_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) {
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_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:
} 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.
+ */
+ nau8825->xtalk_protect = true;
+ nau8825_sema_acquire(nau8825, 0);
+ }
+ /* 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
/* clears the rightmost interruption */
regmap_write(regmap, NAU8825_REG_INT_CLR_KEY_STATUS, clear_irq);
- if (event_mask)
+ /* 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;
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.
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, 2 * 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_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, 2 * HZ);
regmap_update_bits(regmap, NAU8825_REG_FLL3,
NAU8825_FLL_CLK_SRC_MASK, NAU8825_FLL_CLK_SRC_MCLK);
+ /* 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, 2 * HZ);
regmap_update_bits(regmap, NAU8825_REG_FLL3,
NAU8825_FLL_CLK_SRC_MASK, NAU8825_FLL_CLK_SRC_BLK);
+ /* 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, 2 * HZ);
regmap_update_bits(regmap, NAU8825_REG_FLL3,
NAU8825_FLL_CLK_SRC_MASK, NAU8825_FLL_CLK_SRC_FS);
+ /* Release the semaphone. */
+ nau8825_sema_release(nau8825);
+
if (nau8825->mclk_freq) {
clk_disable_unprepare(nau8825->mclk);
nau8825->mclk_freq = 0;
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.
*/
regcache_cache_only(nau8825->regmap, false);
regcache_sync(nau8825->regmap);
+ if (nau8825_is_jack_inserted(nau8825->regmap)) {
+ /* If the jack is inserted, we need to check whether the play-
+ * back is active before suspend. If active, the driver has to
+ * raise the protection for cross talk function to avoid the
+ * playback recovers before cross talk process finish. Other-
+ * wise, the playback will be interfered by cross talk func-
+ * tion. It is better to apply hardware related parameters
+ * before starting playback or record.
+ */
+ if (nau8825_dai_is_active(nau8825)) {
+ nau8825->xtalk_protect = true;
+ nau8825_sema_acquire(nau8825, 0);
+ }
+ }
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,
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);
projects / linux-beck.git / commitdiff