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Diffstat (limited to 'sound/soc/codecs/ak4613.c')
| -rw-r--r-- | sound/soc/codecs/ak4613.c | 936 |
1 files changed, 936 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c new file mode 100644 index 000000000..f75c19ef3 --- /dev/null +++ b/sound/soc/codecs/ak4613.c @@ -0,0 +1,936 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// ak4613.c -- Asahi Kasei ALSA Soc Audio driver +// +// Copyright (C) 2015 Renesas Electronics Corporation +// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> +// +// Based on ak4642.c by Kuninori Morimoto +// Based on wm8731.c by Richard Purdie +// Based on ak4535.c by Richard Purdie +// Based on wm8753.c by Liam Girdwood + +/* + * +-------+ + * |AK4613 | + * SDTO1 <-| | + * | | + * SDTI1 ->| | + * SDTI2 ->| | + * SDTI3 ->| | + * +-------+ + * + * +---+ + * clk | |___________________________________________... + * + * [TDM512] + * SDTO1 [L1][R1][L2][R2] + * SDTI1 [L1][R1][L2][R2][L3][R3][L4][R4][L5][R5][L6][R6] + * + * [TDM256] + * SDTO1 [L1][R1][L2][R2] + * SDTI1 [L1][R1][L2][R2][L3][R3][L4][R4] + * SDTI2 [L5][R5][L6][R6] + * + * [TDM128] + * SDTO1 [L1][R1][L2][R2] + * SDTI1 [L1][R1][L2][R2] + * SDTI2 [L3][R3][L4][R4] + * SDTI3 [L5][R5][L6][R6] + * + * [STEREO] + * Playback 2ch : SDTI1 + * Capture 2ch : SDTO1 + * + * [TDM512] + * Playback 12ch : SDTI1 + * Capture 4ch : SDTO1 + * + * [TDM256] + * Playback 12ch : SDTI1 + SDTI2 + * Playback 8ch : SDTI1 + * Capture 4ch : SDTO1 + * + * [TDM128] + * Playback 12ch : SDTI1 + SDTI2 + SDTI3 + * Playback 8ch : SDTI1 + SDTI2 + * Playback 4ch : SDTI1 + * Capture 4ch : SDTO1 + * + * + * !!! NOTE !!! + * + * Renesas is the only user of ak4613 on upstream so far, + * but the chip connection is like below. + * Thus, Renesas can't test all connection case. + * Tested TDM is very limited. + * + * +-----+ +-----------+ + * | SoC | | AK4613 | + * | |<-----|SDTO1 IN1|<-- Mic + * | | | IN2| + * | | | | + * | |----->|SDTI1 OUT1|--> Headphone + * +-----+ |SDTI2 OUT2| + * |SDTI3 OUT3| + * | OUT4| + * | OUT5| + * | OUT6| + * +-----------+ + * + * Renesas SoC can handle [2, 6,8] channels. + * Ak4613 can handle [2,4, 8,12] channels. + * + * Because of above HW connection and available channels number, + * Renesas could test are ... + * + * [STEREO] Playback 2ch : SDTI1 + * Capture 2ch : SDTO1 + * [TDM256] Playback 8ch : SDTI1 (*) + * + * (*) it used 8ch data between SoC <-> AK4613 on TDM256 mode, + * but could confirm is only first 2ch because only 1 + * Headphone is connected. + * + * see + * AK4613_ENABLE_TDM_TEST + */ +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <sound/soc.h> +#include <sound/pcm_params.h> +#include <sound/tlv.h> + +#define PW_MGMT1 0x00 /* Power Management 1 */ +#define PW_MGMT2 0x01 /* Power Management 2 */ +#define PW_MGMT3 0x02 /* Power Management 3 */ +#define CTRL1 0x03 /* Control 1 */ +#define CTRL2 0x04 /* Control 2 */ +#define DEMP1 0x05 /* De-emphasis1 */ +#define DEMP2 0x06 /* De-emphasis2 */ +#define OFD 0x07 /* Overflow Detect */ +#define ZRD 0x08 /* Zero Detect */ +#define ICTRL 0x09 /* Input Control */ +#define OCTRL 0x0a /* Output Control */ +#define LOUT1 0x0b /* LOUT1 Volume Control */ +#define ROUT1 0x0c /* ROUT1 Volume Control */ +#define LOUT2 0x0d /* LOUT2 Volume Control */ +#define ROUT2 0x0e /* ROUT2 Volume Control */ +#define LOUT3 0x0f /* LOUT3 Volume Control */ +#define ROUT3 0x10 /* ROUT3 Volume Control */ +#define LOUT4 0x11 /* LOUT4 Volume Control */ +#define ROUT4 0x12 /* ROUT4 Volume Control */ +#define LOUT5 0x13 /* LOUT5 Volume Control */ +#define ROUT5 0x14 /* ROUT5 Volume Control */ +#define LOUT6 0x15 /* LOUT6 Volume Control */ +#define ROUT6 0x16 /* ROUT6 Volume Control */ + +/* PW_MGMT1 */ +#define RSTN BIT(0) +#define PMDAC BIT(1) +#define PMADC BIT(2) +#define PMVR BIT(3) + +/* PW_MGMT2 */ +#define PMAD_ALL 0x7 + +/* PW_MGMT3 */ +#define PMDA_ALL 0x3f + +/* CTRL1 */ +#define DIF0 BIT(3) +#define DIF1 BIT(4) +#define DIF2 BIT(5) +#define TDM0 BIT(6) +#define TDM1 BIT(7) +#define NO_FMT (0xff) +#define FMT_MASK (0xf8) + +/* CTRL2 */ +#define DFS_MASK (3 << 2) +#define DFS_NORMAL_SPEED (0 << 2) +#define DFS_DOUBLE_SPEED (1 << 2) +#define DFS_QUAD_SPEED (2 << 2) + +/* ICTRL */ +#define ICTRL_MASK (0x3) + +/* OCTRL */ +#define OCTRL_MASK (0x3F) + +/* + * configs + * + * 0x000000BA + * + * B : AK4613_CONFIG_SDTI_x + * A : AK4613_CONFIG_MODE_x + */ +#define AK4613_CONFIG_SET(priv, x) priv->configs |= AK4613_CONFIG_##x +#define AK4613_CONFIG_GET(priv, x) (priv->configs & AK4613_CONFIG_##x##_MASK) + +/* + * AK4613_CONFIG_SDTI_x + * + * It indicates how many SDTIx is connected. + */ +#define AK4613_CONFIG_SDTI_MASK (0xF << 4) +#define AK4613_CONFIG_SDTI(x) (((x) & 0xF) << 4) +#define AK4613_CONFIG_SDTI_set(priv, x) AK4613_CONFIG_SET(priv, SDTI(x)) +#define AK4613_CONFIG_SDTI_get(priv) ((AK4613_CONFIG_GET(priv, SDTI) >> 4) & 0xF) + +/* + * AK4613_CONFIG_MODE_x + * + * Same as Ctrl1 :: TDM1/TDM0 + * No shift is requested + * see + * AK4613_CTRL1_TO_MODE() + * Table 11/12/13/14 + */ +#define AK4613_CONFIG_MODE_MASK (0xF) +#define AK4613_CONFIG_MODE_STEREO (0x0) +#define AK4613_CONFIG_MODE_TDM512 (0x1) +#define AK4613_CONFIG_MODE_TDM256 (0x2) +#define AK4613_CONFIG_MODE_TDM128 (0x3) + +/* + * !!!! FIXME !!!! + * + * Because of testable HW limitation, TDM256 8ch TDM was only tested. + * This driver uses AK4613_ENABLE_TDM_TEST instead of new DT property so far. + * Don't hesitate to update driver, you don't need to care compatible + * with Renesas. + * + * #define AK4613_ENABLE_TDM_TEST + */ + +struct ak4613_interface { + unsigned int width; + unsigned int fmt; + u8 dif; +}; + +struct ak4613_priv { + struct mutex lock; + struct snd_pcm_hw_constraint_list constraint_rates; + struct snd_pcm_hw_constraint_list constraint_channels; + struct work_struct dummy_write_work; + struct snd_soc_component *component; + unsigned int rate; + unsigned int sysclk; + + unsigned int fmt; + unsigned int configs; + int cnt; + u8 ctrl1; + u8 oc; + u8 ic; +}; + +/* + * Playback Volume + * + * max : 0x00 : 0 dB + * ( 0.5 dB step ) + * min : 0xFE : -127.0 dB + * mute: 0xFF + */ +static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1); + +static const struct snd_kcontrol_new ak4613_snd_controls[] = { + SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1, + 0, 0xFF, 1, out_tlv), + SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2, + 0, 0xFF, 1, out_tlv), + SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3, + 0, 0xFF, 1, out_tlv), + SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4, + 0, 0xFF, 1, out_tlv), + SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5, + 0, 0xFF, 1, out_tlv), + SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6, + 0, 0xFF, 1, out_tlv), +}; + +static const struct reg_default ak4613_reg[] = { + { 0x0, 0x0f }, { 0x1, 0x07 }, { 0x2, 0x3f }, { 0x3, 0x20 }, + { 0x4, 0x20 }, { 0x5, 0x55 }, { 0x6, 0x05 }, { 0x7, 0x07 }, + { 0x8, 0x0f }, { 0x9, 0x07 }, { 0xa, 0x3f }, { 0xb, 0x00 }, + { 0xc, 0x00 }, { 0xd, 0x00 }, { 0xe, 0x00 }, { 0xf, 0x00 }, + { 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 }, + { 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 }, +}; + +/* + * CTRL1 register + * see + * Table 11/12/13/14 + */ +#define AUDIO_IFACE(_dif, _width, _fmt) \ + { \ + .dif = _dif, \ + .width = _width, \ + .fmt = SND_SOC_DAIFMT_##_fmt,\ + } +static const struct ak4613_interface ak4613_iface[] = { + /* It doesn't support asymmetric format */ + + AUDIO_IFACE(0x03, 24, LEFT_J), + AUDIO_IFACE(0x04, 24, I2S), +}; +#define AK4613_CTRL1_TO_MODE(priv) ((priv)->ctrl1 >> 6) /* AK4613_CONFIG_MODE_x */ + +static const struct regmap_config ak4613_regmap_cfg = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x16, + .reg_defaults = ak4613_reg, + .num_reg_defaults = ARRAY_SIZE(ak4613_reg), + .cache_type = REGCACHE_RBTREE, +}; + +static const struct of_device_id ak4613_of_match[] = { + { .compatible = "asahi-kasei,ak4613", .data = &ak4613_regmap_cfg }, + {}, +}; +MODULE_DEVICE_TABLE(of, ak4613_of_match); + +static const struct i2c_device_id ak4613_i2c_id[] = { + { "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id); + +static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = { + + /* Outputs */ + SND_SOC_DAPM_OUTPUT("LOUT1"), + SND_SOC_DAPM_OUTPUT("LOUT2"), + SND_SOC_DAPM_OUTPUT("LOUT3"), + SND_SOC_DAPM_OUTPUT("LOUT4"), + SND_SOC_DAPM_OUTPUT("LOUT5"), + SND_SOC_DAPM_OUTPUT("LOUT6"), + + SND_SOC_DAPM_OUTPUT("ROUT1"), + SND_SOC_DAPM_OUTPUT("ROUT2"), + SND_SOC_DAPM_OUTPUT("ROUT3"), + SND_SOC_DAPM_OUTPUT("ROUT4"), + SND_SOC_DAPM_OUTPUT("ROUT5"), + SND_SOC_DAPM_OUTPUT("ROUT6"), + + /* Inputs */ + SND_SOC_DAPM_INPUT("LIN1"), + SND_SOC_DAPM_INPUT("LIN2"), + + SND_SOC_DAPM_INPUT("RIN1"), + SND_SOC_DAPM_INPUT("RIN2"), + + /* DAC */ + SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0), + SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0), + SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0), + SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0), + SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0), + SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0), + + /* ADC */ + SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0), + SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0), +}; + +static const struct snd_soc_dapm_route ak4613_intercon[] = { + {"LOUT1", NULL, "DAC1"}, + {"LOUT2", NULL, "DAC2"}, + {"LOUT3", NULL, "DAC3"}, + {"LOUT4", NULL, "DAC4"}, + {"LOUT5", NULL, "DAC5"}, + {"LOUT6", NULL, "DAC6"}, + + {"ROUT1", NULL, "DAC1"}, + {"ROUT2", NULL, "DAC2"}, + {"ROUT3", NULL, "DAC3"}, + {"ROUT4", NULL, "DAC4"}, + {"ROUT5", NULL, "DAC5"}, + {"ROUT6", NULL, "DAC6"}, + + {"DAC1", NULL, "Playback"}, + {"DAC2", NULL, "Playback"}, + {"DAC3", NULL, "Playback"}, + {"DAC4", NULL, "Playback"}, + {"DAC5", NULL, "Playback"}, + {"DAC6", NULL, "Playback"}, + + {"Capture", NULL, "ADC1"}, + {"Capture", NULL, "ADC2"}, + + {"ADC1", NULL, "LIN1"}, + {"ADC2", NULL, "LIN2"}, + + {"ADC1", NULL, "RIN1"}, + {"ADC2", NULL, "RIN2"}, +}; + +static void ak4613_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct ak4613_priv *priv = snd_soc_component_get_drvdata(component); + struct device *dev = component->dev; + + mutex_lock(&priv->lock); + priv->cnt--; + if (priv->cnt < 0) { + dev_err(dev, "unexpected counter error\n"); + priv->cnt = 0; + } + if (!priv->cnt) + priv->ctrl1 = 0; + mutex_unlock(&priv->lock); +} + +static void ak4613_hw_constraints(struct ak4613_priv *priv, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + static const unsigned int ak4613_rates[] = { + 32000, + 44100, + 48000, + 64000, + 88200, + 96000, + 176400, + 192000, + }; +#define AK4613_CHANNEL_2 0 +#define AK4613_CHANNEL_4 1 +#define AK4613_CHANNEL_8 2 +#define AK4613_CHANNEL_12 3 +#define AK4613_CHANNEL_NONE -1 + static const unsigned int ak4613_channels[] = { + [AK4613_CHANNEL_2] = 2, + [AK4613_CHANNEL_4] = 4, + [AK4613_CHANNEL_8] = 8, + [AK4613_CHANNEL_12] = 12, + }; +#define MODE_MAX 4 +#define SDTx_MAX 4 +#define MASK(x) (1 << AK4613_CHANNEL_##x) + static const int mask_list[MODE_MAX][SDTx_MAX] = { + /* SDTO SDTIx1 SDTIx2 SDTIx3 */ + [AK4613_CONFIG_MODE_STEREO] = { MASK(2), MASK(2), MASK(2), MASK(2)}, + [AK4613_CONFIG_MODE_TDM512] = { MASK(4), MASK(12), MASK(12), MASK(12)}, + [AK4613_CONFIG_MODE_TDM256] = { MASK(4), MASK(8), MASK(8)|MASK(12), MASK(8)|MASK(12)}, + [AK4613_CONFIG_MODE_TDM128] = { MASK(4), MASK(4), MASK(4)|MASK(8), MASK(4)|MASK(8)|MASK(12)}, + }; + struct snd_pcm_hw_constraint_list *constraint; + unsigned int mask; + unsigned int mode; + unsigned int fs; + int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int sdti_num; + int i; + + constraint = &priv->constraint_rates; + constraint->list = ak4613_rates; + constraint->mask = 0; + constraint->count = 0; + + /* + * Slave Mode + * Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs + * Double: [64kHz, 96kHz] : 256fs + * Quad : [128kHz,192kHz]: 128fs + * + * Master mode + * Normal: [32kHz, 48kHz] : 256fs or 512fs + * Double: [64kHz, 96kHz] : 256fs + * Quad : [128kHz,192kHz]: 128fs + */ + for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) { + /* minimum fs on each range */ + fs = (ak4613_rates[i] <= 96000) ? 256 : 128; + + if (priv->sysclk >= ak4613_rates[i] * fs) + constraint->count = i + 1; + } + + snd_pcm_hw_constraint_list(runtime, 0, + SNDRV_PCM_HW_PARAM_RATE, constraint); + + + sdti_num = AK4613_CONFIG_SDTI_get(priv); + if (WARN_ON(sdti_num >= SDTx_MAX)) + return; + + if (priv->cnt) { + /* + * If it was already working, + * the constraint is same as working mode. + */ + mode = AK4613_CTRL1_TO_MODE(priv); + mask = 0; /* no default */ + } else { + /* + * It is not yet working, + * the constraint is based on board configs. + * STEREO mask is default + */ + mode = AK4613_CONFIG_GET(priv, MODE); + mask = mask_list[AK4613_CONFIG_MODE_STEREO][is_play * sdti_num]; + } + + if (WARN_ON(mode >= MODE_MAX)) + return; + + /* add each mode mask */ + mask |= mask_list[mode][is_play * sdti_num]; + + constraint = &priv->constraint_channels; + constraint->list = ak4613_channels; + constraint->mask = mask; + constraint->count = sizeof(ak4613_channels); + snd_pcm_hw_constraint_list(runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, constraint); +} + +static int ak4613_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct ak4613_priv *priv = snd_soc_component_get_drvdata(component); + + mutex_lock(&priv->lock); + ak4613_hw_constraints(priv, substream); + priv->cnt++; + mutex_unlock(&priv->lock); + + return 0; +} + +static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai, + int clk_id, unsigned int freq, int dir) +{ + struct snd_soc_component *component = codec_dai->component; + struct ak4613_priv *priv = snd_soc_component_get_drvdata(component); + + priv->sysclk = freq; + + return 0; +} + +static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int format) +{ + struct snd_soc_component *component = dai->component; + struct ak4613_priv *priv = snd_soc_component_get_drvdata(component); + unsigned int fmt; + + fmt = format & SND_SOC_DAIFMT_FORMAT_MASK; + switch (fmt) { + case SND_SOC_DAIFMT_LEFT_J: + case SND_SOC_DAIFMT_I2S: + priv->fmt = fmt; + break; + default: + return -EINVAL; + } + + fmt = format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK; + switch (fmt) { + case SND_SOC_DAIFMT_CBC_CFC: + break; + default: + /* + * SUPPORTME + * + * "clock provider" is not yet supperted + */ + return -EINVAL; + } + + return 0; +} + +static int ak4613_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct ak4613_priv *priv = snd_soc_component_get_drvdata(component); + struct device *dev = component->dev; + unsigned int width = params_width(params); + unsigned int fmt = priv->fmt; + unsigned int rate; + int i, ret; + u8 ctrl2; + + rate = params_rate(params); + switch (rate) { + case 32000: + case 44100: + case 48000: + ctrl2 = DFS_NORMAL_SPEED; + break; + case 64000: + case 88200: + case 96000: + ctrl2 = DFS_DOUBLE_SPEED; + break; + case 176400: + case 192000: + ctrl2 = DFS_QUAD_SPEED; + break; + default: + return -EINVAL; + } + priv->rate = rate; + + /* + * FIXME + * + * It doesn't have full TDM suppert yet + */ + ret = -EINVAL; + + mutex_lock(&priv->lock); + if (priv->cnt > 1) { + /* + * If it was already working, use current priv->ctrl1 + */ + ret = 0; + } else { + /* + * It is not yet working, + */ + unsigned int channel = params_channels(params); + u8 tdm; + + /* STEREO or TDM */ + if (channel == 2) + tdm = AK4613_CONFIG_MODE_STEREO; + else + tdm = AK4613_CONFIG_GET(priv, MODE); + + for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) { + const struct ak4613_interface *iface = ak4613_iface + i; + + if ((iface->fmt == fmt) && (iface->width == width)) { + /* + * Ctrl1 + * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 | + * |TDM1|TDM0|DIF2|DIF1|DIF0|ATS1|ATS0|SMUTE| + * < tdm > < iface->dif > + */ + priv->ctrl1 = (tdm << 6) | (iface->dif << 3); + ret = 0; + break; + } + } + } + mutex_unlock(&priv->lock); + + if (ret < 0) + goto hw_params_end; + + snd_soc_component_update_bits(component, CTRL1, FMT_MASK, priv->ctrl1); + snd_soc_component_update_bits(component, CTRL2, DFS_MASK, ctrl2); + + snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, priv->ic); + snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, priv->oc); + +hw_params_end: + if (ret < 0) + dev_warn(dev, "unsupported data width/format combination\n"); + + return ret; +} + +static int ak4613_set_bias_level(struct snd_soc_component *component, + enum snd_soc_bias_level level) +{ + u8 mgmt1 = 0; + + switch (level) { + case SND_SOC_BIAS_ON: + mgmt1 |= RSTN; + fallthrough; + case SND_SOC_BIAS_PREPARE: + mgmt1 |= PMADC | PMDAC; + fallthrough; + case SND_SOC_BIAS_STANDBY: + mgmt1 |= PMVR; + fallthrough; + case SND_SOC_BIAS_OFF: + default: + break; + } + + snd_soc_component_write(component, PW_MGMT1, mgmt1); + + return 0; +} + +static void ak4613_dummy_write(struct work_struct *work) +{ + struct ak4613_priv *priv = container_of(work, + struct ak4613_priv, + dummy_write_work); + struct snd_soc_component *component = priv->component; + unsigned int mgmt1; + unsigned int mgmt3; + + /* + * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks + * + * Note + * + * To avoid extra delay, we want to avoid preemption here, + * but we can't. Because it uses I2C access which is using IRQ + * and sleep. Thus, delay might be more than 5 LR clocks + * see also + * ak4613_dai_trigger() + */ + udelay(5000000 / priv->rate); + + mgmt1 = snd_soc_component_read(component, PW_MGMT1); + mgmt3 = snd_soc_component_read(component, PW_MGMT3); + + snd_soc_component_write(component, PW_MGMT1, mgmt1); + snd_soc_component_write(component, PW_MGMT3, mgmt3); +} + +static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct ak4613_priv *priv = snd_soc_component_get_drvdata(component); + + /* + * FIXME + * + * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks + * from Power Down Release. Otherwise, Playback volume will be 0dB. + * To avoid complex multiple delay/dummy_write method from + * ak4613_set_bias_level() / SND_SOC_DAPM_DAC_E("DACx", ...), + * call it once here. + * + * But, unfortunately, we can't "write" here because here is atomic + * context (It uses I2C access for writing). + * Thus, use schedule_work() to switching to normal context + * immediately. + * + * Note + * + * Calling ak4613_dummy_write() function might be delayed. + * In such case, ak4613 volume might be temporarily 0dB when + * beggining of playback. + * see also + * ak4613_dummy_write() + */ + + if ((cmd != SNDRV_PCM_TRIGGER_START) && + (cmd != SNDRV_PCM_TRIGGER_RESUME)) + return 0; + + if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) + return 0; + + priv->component = component; + schedule_work(&priv->dummy_write_work); + + return 0; +} + +/* + * Select below from Sound Card, not Auto + * SND_SOC_DAIFMT_CBC_CFC + * SND_SOC_DAIFMT_CBP_CFP + */ +static u64 ak4613_dai_formats = + SND_SOC_POSSIBLE_DAIFMT_I2S | + SND_SOC_POSSIBLE_DAIFMT_LEFT_J; + +static const struct snd_soc_dai_ops ak4613_dai_ops = { + .startup = ak4613_dai_startup, + .shutdown = ak4613_dai_shutdown, + .set_sysclk = ak4613_dai_set_sysclk, + .set_fmt = ak4613_dai_set_fmt, + .trigger = ak4613_dai_trigger, + .hw_params = ak4613_dai_hw_params, + .auto_selectable_formats = &ak4613_dai_formats, + .num_auto_selectable_formats = 1, +}; + +#define AK4613_PCM_RATE (SNDRV_PCM_RATE_32000 |\ + SNDRV_PCM_RATE_44100 |\ + SNDRV_PCM_RATE_48000 |\ + SNDRV_PCM_RATE_64000 |\ + SNDRV_PCM_RATE_88200 |\ + SNDRV_PCM_RATE_96000 |\ + SNDRV_PCM_RATE_176400 |\ + SNDRV_PCM_RATE_192000) +#define AK4613_PCM_FMTBIT (SNDRV_PCM_FMTBIT_S24_LE) + +static struct snd_soc_dai_driver ak4613_dai = { + .name = "ak4613-hifi", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 12, + .rates = AK4613_PCM_RATE, + .formats = AK4613_PCM_FMTBIT, + }, + .capture = { + .stream_name = "Capture", + .channels_min = 2, + .channels_max = 4, + .rates = AK4613_PCM_RATE, + .formats = AK4613_PCM_FMTBIT, + }, + .ops = &ak4613_dai_ops, + .symmetric_rate = 1, +}; + +static int ak4613_suspend(struct snd_soc_component *component) +{ + struct regmap *regmap = dev_get_regmap(component->dev, NULL); + + regcache_cache_only(regmap, true); + regcache_mark_dirty(regmap); + return 0; +} + +static int ak4613_resume(struct snd_soc_component *component) +{ + struct regmap *regmap = dev_get_regmap(component->dev, NULL); + + regcache_cache_only(regmap, false); + return regcache_sync(regmap); +} + +static const struct snd_soc_component_driver soc_component_dev_ak4613 = { + .suspend = ak4613_suspend, + .resume = ak4613_resume, + .set_bias_level = ak4613_set_bias_level, + .controls = ak4613_snd_controls, + .num_controls = ARRAY_SIZE(ak4613_snd_controls), + .dapm_widgets = ak4613_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(ak4613_dapm_widgets), + .dapm_routes = ak4613_intercon, + .num_dapm_routes = ARRAY_SIZE(ak4613_intercon), + .idle_bias_on = 1, + .endianness = 1, +}; + +static void ak4613_parse_of(struct ak4613_priv *priv, + struct device *dev) +{ + struct device_node *np = dev->of_node; + char prop[32]; + int sdti_num; + int i; + + /* Input 1 - 2 */ + for (i = 0; i < 2; i++) { + snprintf(prop, sizeof(prop), "asahi-kasei,in%d-single-end", i + 1); + if (!of_get_property(np, prop, NULL)) + priv->ic |= 1 << i; + } + + /* Output 1 - 6 */ + for (i = 0; i < 6; i++) { + snprintf(prop, sizeof(prop), "asahi-kasei,out%d-single-end", i + 1); + if (!of_get_property(np, prop, NULL)) + priv->oc |= 1 << i; + } + + /* + * enable TDM256 test + * + * !!! FIXME !!! + * + * It should be configured by DT or other way + * if it was full supported. + * But it is using ifdef style for now for test + * purpose. + */ +#if defined(AK4613_ENABLE_TDM_TEST) + AK4613_CONFIG_SET(priv, MODE_TDM256); +#endif + + /* + * connected STDI + * TDM support is assuming it is probed via Audio-Graph-Card style here. + * Default is SDTIx1 if it was probed via Simple-Audio-Card for now. + */ + sdti_num = of_graph_get_endpoint_count(np); + if ((sdti_num >= SDTx_MAX) || (sdti_num < 1)) + sdti_num = 1; + + AK4613_CONFIG_SDTI_set(priv, sdti_num); +} + +static int ak4613_i2c_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct device_node *np = dev->of_node; + const struct regmap_config *regmap_cfg; + struct regmap *regmap; + struct ak4613_priv *priv; + + regmap_cfg = NULL; + if (np) + regmap_cfg = of_device_get_match_data(dev); + else { + const struct i2c_device_id *id = + i2c_match_id(ak4613_i2c_id, i2c); + regmap_cfg = (const struct regmap_config *)id->driver_data; + } + + if (!regmap_cfg) + return -EINVAL; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ak4613_parse_of(priv, dev); + + priv->ctrl1 = 0; + priv->cnt = 0; + priv->sysclk = 0; + INIT_WORK(&priv->dummy_write_work, ak4613_dummy_write); + + mutex_init(&priv->lock); + + i2c_set_clientdata(i2c, priv); + + regmap = devm_regmap_init_i2c(i2c, regmap_cfg); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return devm_snd_soc_register_component(dev, &soc_component_dev_ak4613, + &ak4613_dai, 1); +} + +static struct i2c_driver ak4613_i2c_driver = { + .driver = { + .name = "ak4613-codec", + .of_match_table = ak4613_of_match, + }, + .probe_new = ak4613_i2c_probe, + .id_table = ak4613_i2c_id, +}; + +module_i2c_driver(ak4613_i2c_driver); + +MODULE_DESCRIPTION("Soc AK4613 driver"); +MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); +MODULE_LICENSE("GPL v2"); |