[PATCH v2 2/3] ASoC: codecs: Add support for the Renesas IDT821034 codec

Herve Codina
2023-01-20T09:51:02Z

The Renesas IDT821034 codec is four channel PCM codec with on-chip
filters and programmable gain setting.
It also provides SLIC (Subscriber Line Interface Circuit) signals as
GPIOs.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
sound/soc/codecs/Kconfig | 12 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/idt821034.c | 1200 ++++++++++++++++++++++++++++++++++
3 files changed, 1214 insertions(+)
create mode 100644 sound/soc/codecs/idt821034.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 0f9d71490075..67489b2ebd9f 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -107,6 +107,7 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_HDAC_HDMI
imply SND_SOC_HDAC_HDA
imply SND_SOC_ICS43432
+ imply SND_SOC_IDT821034
imply SND_SOC_INNO_RK3036
imply SND_SOC_ISABELLE
imply SND_SOC_JZ4740_CODEC
@@ -972,6 +973,17 @@ config SND_SOC_HDA
config SND_SOC_ICS43432
tristate "ICS43423 and compatible i2s microphones"

+config SND_SOC_IDT821034
+ tristate "Renesas IDT821034 quad PCM codec"
+ depends on SPI
+ select REGMAP_SPI
+ help
+ Enable support for the Renesas IDT821034 quad PCM with
+ programmable gain codec.
+
+ To compile this driver as a module, choose M here: the module
+ will be called snd-soc-idt821034.
+
config SND_SOC_INNO_RK3036
tristate "Inno codec driver for RK3036 SoC"
select REGMAP_MMIO
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 71d3ce5867e4..bcf95de654fd 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -111,6 +111,7 @@ snd-soc-hdac-hdmi-objs := hdac_hdmi.o
snd-soc-hdac-hda-objs := hdac_hda.o
snd-soc-hda-codec-objs := hda.o hda-dai.o
snd-soc-ics43432-objs := ics43432.o
+snd-soc-idt821034-objs := idt821034.o
snd-soc-inno-rk3036-objs := inno_rk3036.o
snd-soc-isabelle-objs := isabelle.o
snd-soc-jz4740-codec-objs := jz4740.o
@@ -472,6 +473,7 @@ obj-$(CONFIG_SND_SOC_HDAC_HDMI) += snd-soc-hdac-hdmi.o
obj-$(CONFIG_SND_SOC_HDAC_HDA) += snd-soc-hdac-hda.o
obj-$(CONFIG_SND_SOC_HDA) += snd-soc-hda-codec.o
obj-$(CONFIG_SND_SOC_ICS43432) += snd-soc-ics43432.o
+obj-$(CONFIG_SND_SOC_IDT821034) += snd-soc-idt821034.o
obj-$(CONFIG_SND_SOC_INNO_RK3036) += snd-soc-inno-rk3036.o
obj-$(CONFIG_SND_SOC_ISABELLE) += snd-soc-isabelle.o
obj-$(CONFIG_SND_SOC_JZ4740_CODEC) += snd-soc-jz4740-codec.o
diff --git a/sound/soc/codecs/idt821034.c b/sound/soc/codecs/idt821034.c
new file mode 100644
index 000000000000..5eb93fec6042
--- /dev/null
+++ b/sound/soc/codecs/idt821034.c
@@ -0,0 +1,1200 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// IDT821034 ALSA SoC driver
+//
+// Copyright 2022 CS GROUP France
+//
+// Author: Herve Codina <herve.codina@bootlin.com>
+
+#include <linux/bitrev.h>
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#define IDT821034_NB_CHANNEL 4
+
+struct idt821034_amp {
+ u16 gain;
+ bool is_muted;
+};
+
+struct idt821034 {
+ struct spi_device *spi;
+ struct mutex mutex;
+ u8 spi_tx_buf; /* Cannot use stack area for SPI (dma-safe memory) */
+ u8 spi_rx_buf; /* Cannot use stack area for SPI (dma-safe memory) */
+ struct {
+ u8 codec_conf;
+ struct {
+ u8 power;
+ u8 tx_slot;
+ u8 rx_slot;
+ u8 slic_conf;
+ u8 slic_control;
+ } ch[IDT821034_NB_CHANNEL];
+ } cache;
+ struct {
+ struct {
+ struct idt821034_amp amp_out;
+ struct idt821034_amp amp_in;
+ } ch[IDT821034_NB_CHANNEL];
+ } amps;
+ int max_ch_playback;
+ int max_ch_capture;
+ struct gpio_chip gpio_chip;
+};
+
+static int idt821034_8bit_write(struct idt821034 *idt821034, u8 val)
+{
+ struct spi_transfer xfer[] = {
+ {
+ .tx_buf = &idt821034->spi_tx_buf,
+ .len = 1,
+ }, {
+ .cs_off = 1,
+ .tx_buf = &idt821034->spi_tx_buf,
+ .len = 1,
+ }
+ };
+ int ret;
+
+ idt821034->spi_tx_buf = val;
+
+ dev_vdbg(&idt821034->spi->dev, "spi xfer wr 0x%x\n", val);
+
+ ret = spi_sync_transfer(idt821034->spi, xfer, 2);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int idt821034_8bit_read(struct idt821034 *idt821034, u8 valw, u8 *valr)
+{
+ struct spi_transfer xfer[] = {
+ {
+ .tx_buf = &idt821034->spi_tx_buf,
+ .rx_buf = &idt821034->spi_rx_buf,
+ .len = 1,
+ }, {
+ .cs_off = 1,
+ .tx_buf = &idt821034->spi_tx_buf,
+ .len = 1,
+ }
+ };
+ int ret;
+
+ idt821034->spi_tx_buf = valw;
+
+ ret = spi_sync_transfer(idt821034->spi, xfer, 2);
+ if (ret)
+ return ret;
+
+ *valr = idt821034->spi_rx_buf;
+
+ dev_vdbg(&idt821034->spi->dev, "spi xfer wr 0x%x, rd 0x%x\n",
+ valw, *valr);
+
+ return 0;
+}
+
+/* Available mode the programming sequence */
+#define IDT821034_MODE_CODEC(_ch) (0x80 | ((_ch) << 2))
+#define IDT821034_MODE_SLIC(_ch) (0xD0 | ((_ch) << 2))
+#define IDT821034_MODE_GAIN(_ch) (0xC0 | ((_ch) << 2))
+
+/* Power values that can be used in 'power' (can be ORed) */
+#define IDT821034_CONF_PWRUP_TX BIT(1) /* from analog input to PCM */
+#define IDT821034_CONF_PWRUP_RX BIT(0) /* from PCM to analog output */
+
+static int idt821034_set_channel_power(struct idt821034 *idt821034, u8 ch, u8 power)
+{
+ u8 conf;
+ int ret;
+
+ dev_dbg(&idt821034->spi->dev, "set_channel_power(%u, 0x%x)\n", ch, power);
+
+ conf = IDT821034_MODE_CODEC(ch) | idt821034->cache.codec_conf;
+
+ if (power & IDT821034_CONF_PWRUP_RX) {
+ ret = idt821034_8bit_write(idt821034, conf | IDT821034_CONF_PWRUP_RX);
+ if (ret)
+ return ret;
+ ret = idt821034_8bit_write(idt821034, idt821034->cache.ch[ch].rx_slot);
+ if (ret)
+ return ret;
+ }
+ if (power & IDT821034_CONF_PWRUP_TX) {
+ ret = idt821034_8bit_write(idt821034, conf | IDT821034_CONF_PWRUP_TX);
+ if (ret)
+ return ret;
+ ret = idt821034_8bit_write(idt821034, idt821034->cache.ch[ch].tx_slot);
+ if (ret)
+ return ret;
+ }
+ if (!(power & (IDT821034_CONF_PWRUP_TX | IDT821034_CONF_PWRUP_RX))) {
+ ret = idt821034_8bit_write(idt821034, conf);
+ if (ret)
+ return ret;
+ ret = idt821034_8bit_write(idt821034, 0x00);
+ if (ret)
+ return ret;
+ }
+
+ idt821034->cache.ch[ch].power = power;
+
+ return 0;
+}
+
+static u8 idt821034_get_channel_power(struct idt821034 *idt821034, u8 ch)
+{
+ return idt821034->cache.ch[ch].power;
+}
+
+/* Codec configuration values that can be used in 'codec_conf' (can be ORed) */
+#define IDT821034_CONF_ALAW_MODE BIT(5)
+#define IDT821034_CONF_DELAY_MODE BIT(4)
+
+static int idt821034_set_codec_conf(struct idt821034 *idt821034, u8 codec_conf)
+{
+ u8 conf;
+ u8 ts;
+ int ret;
+
+ dev_dbg(&idt821034->spi->dev, "set_codec_conf(0x%x)\n", codec_conf);
+
+ /* codec conf fields are common to all channel.
+ * Arbitrary use of channel 0 for this configuration.
+ */
+
+ /* Set Configuration Register */
+ conf = IDT821034_MODE_CODEC(0) | codec_conf;
+
+ /* Update conf value and timeslot register value according
+ * to cache values
+ */
+ if (idt821034->cache.ch[0].power & IDT821034_CONF_PWRUP_RX) {
+ conf |= IDT821034_CONF_PWRUP_RX;
+ ts = idt821034->cache.ch[0].rx_slot;
+ } else if (idt821034->cache.ch[0].power & IDT821034_CONF_PWRUP_TX) {
+ conf |= IDT821034_CONF_PWRUP_TX;
+ ts = idt821034->cache.ch[0].tx_slot;
+ } else {
+ ts = 0x00;
+ }
+
+ /* Write configuration register and time-slot register */
+ ret = idt821034_8bit_write(idt821034, conf);
+ if (ret)
+ return ret;
+ ret = idt821034_8bit_write(idt821034, ts);
+ if (ret)
+ return ret;
+
+ idt821034->cache.codec_conf = codec_conf;
+ return 0;
+}
+
+static u8 idt821034_get_codec_conf(struct idt821034 *idt821034)
+{
+ return idt821034->cache.codec_conf;
+}
+
+/* Channel direction values that can be used in 'ch_dir' (can be ORed) */
+#define IDT821034_CH_RX BIT(0) /* from PCM to analog output */
+#define IDT821034_CH_TX BIT(1) /* from analog input to PCM */
+
+static int idt821034_set_channel_ts(struct idt821034 *idt821034, u8 ch, u8 ch_dir, u8 ts_num)
+{
+ u8 conf;
+ int ret;
+
+ dev_dbg(&idt821034->spi->dev, "set_channel_ts(%u, 0x%x, %d)\n", ch, ch_dir, ts_num);
+
+ conf = IDT821034_MODE_CODEC(ch) | idt821034->cache.codec_conf;
+
+ if (ch_dir & IDT821034_CH_RX) {
+ if (idt821034->cache.ch[ch].power & IDT821034_CONF_PWRUP_RX) {
+ ret = idt821034_8bit_write(idt821034, conf | IDT821034_CONF_PWRUP_RX);
+ if (ret)
+ return ret;
+ ret = idt821034_8bit_write(idt821034, ts_num);
+ if (ret)
+ return ret;
+ }
+ idt821034->cache.ch[ch].rx_slot = ts_num;
+ }
+ if (ch_dir & IDT821034_CH_TX) {
+ if (idt821034->cache.ch[ch].power & IDT821034_CONF_PWRUP_TX) {
+ ret = idt821034_8bit_write(idt821034, conf | IDT821034_CONF_PWRUP_TX);
+ if (ret)
+ return ret;
+ ret = idt821034_8bit_write(idt821034, ts_num);
+ if (ret)
+ return ret;
+ }
+ idt821034->cache.ch[ch].tx_slot = ts_num;
+ }
+
+ return 0;
+}
+
+/* SLIC direction values that can be used in 'slic_dir' (can be ORed) */
+#define IDT821034_SLIC_IO1_IN BIT(1)
+#define IDT821034_SLIC_IO0_IN BIT(0)
+
+static int idt821034_set_slic_conf(struct idt821034 *idt821034, u8 ch, u8 slic_dir)
+{
+ u8 conf;
+ int ret;
+
+ dev_dbg(&idt821034->spi->dev, "set_slic_conf(%u, 0x%x)\n", ch, slic_dir);
+
+ conf = IDT821034_MODE_SLIC(ch) | slic_dir;
+ ret = idt821034_8bit_write(idt821034, conf);
+ if (ret)
+ return ret;
+
+ ret = idt821034_8bit_write(idt821034, idt821034->cache.ch[ch].slic_control);
+ if (ret)
+ return ret;
+
+ idt821034->cache.ch[ch].slic_conf = slic_dir;
+
+ return 0;
+}
+
+static u8 idt821034_get_slic_conf(struct idt821034 *idt821034, u8 ch)
+{
+ return idt821034->cache.ch[ch].slic_conf;
+}
+
+static int idt821034_write_slic_raw(struct idt821034 *idt821034, u8 ch, u8 slic_raw)
+{
+ u8 conf;
+ int ret;
+
+ dev_dbg(&idt821034->spi->dev, "write_slic_raw(%u, 0x%x)\n", ch, slic_raw);
+
+ /*
+ * On write, slic_raw is mapped as follow :
+ * b4: O_4
+ * b3: O_3
+ * b2: O_2
+ * b1: I/O_1
+ * b0: I/O_0
+ */
+
+ conf = IDT821034_MODE_SLIC(ch) | idt821034->cache.ch[ch].slic_conf;
+ ret = idt821034_8bit_write(idt821034, conf);
+ if (ret)
+ return ret;
+
+ ret = idt821034_8bit_write(idt821034, slic_raw);
+ if (ret)
+ return ret;
+
+ idt821034->cache.ch[ch].slic_control = slic_raw;
+ return 0;
+}
+
+static u8 idt821034_get_written_slic_raw(struct idt821034 *idt821034, u8 ch)
+{
+ return idt821034->cache.ch[ch].slic_control;
+}
+
+static int idt821034_read_slic_raw(struct idt821034 *idt821034, u8 ch, u8 *slic_raw)
+{
+ u8 val;
+ int ret;
+
+ /*
+ * On read, slic_raw is mapped as follow :
+ * b7: I/O_0
+ * b6: I/O_1
+ * b5: O_2
+ * b4: O_3
+ * b3: O_4
+ * b2: I/O1_0, I/O_0 from channel 1 (no matter ch value)
+ * b1: I/O2_0, I/O_0 from channel 2 (no matter ch value)
+ * b2: I/O3_0, I/O_0 from channel 3 (no matter ch value)
+ */
+
+ val = IDT821034_MODE_SLIC(ch) | idt821034->cache.ch[ch].slic_conf;
+ ret = idt821034_8bit_write(idt821034, val);
+ if (ret)
+ return ret;
+
+ ret = idt821034_8bit_read(idt821034, idt821034->cache.ch[ch].slic_control, slic_raw);
+ if (ret)
+ return ret;
+
+ dev_dbg(&idt821034->spi->dev, "read_slic_raw(%i) 0x%x\n", ch, *slic_raw);
+
+ return 0;
+}
+
+/* Gain type values that can be used in 'gain_type' (cannot be ORed) */
+#define IDT821034_GAIN_RX (0 << 1) /* from PCM to analog output */
+#define IDT821034_GAIN_TX (1 << 1) /* from analog input to PCM */
+
+static int idt821034_set_gain_channel(struct idt821034 *idt821034, u8 ch,
+ u8 gain_type, u16 gain_val)
+{
+ u8 conf;
+ int ret;
+
+ dev_dbg(&idt821034->spi->dev, "set_gain_channel(%u, 0x%x, 0x%x-%d)\n",
+ ch, gain_type, gain_val, gain_val);
+
+ /*
+ * The gain programming coefficients should be calculated as:
+ * Transmit : Coeff_X = round [ gain_X0dB × gain_X ]
+ * Receive: Coeff_R = round [ gain_R0dB × gain_R ]
+ * where:
+ * gain_X0dB = 1820;
+ * gain_X is the target gain;
+ * Coeff_X should be in the range of 0 to 8192.
+ * gain_R0dB = 2506;
+ * gain_R is the target gain;
+ * Coeff_R should be in the range of 0 to 8192.
+ *
+ * A gain programming coefficient is 14-bit wide and in binary format.
+ * The 7 Most Significant Bits of the coefficient is called
+ * GA_MSB_Transmit for transmit path, or is called GA_MSB_Receive for
+ * receive path; The 7 Least Significant Bits of the coefficient is
+ * called GA_LSB_ Transmit for transmit path, or is called
+ * GA_LSB_Receive for receive path.
+ *
+ * An example is given below to clarify the calculation of the
+ * coefficient. To program a +3 dB gain in transmit path and a -3.5 dB
+ * gain in receive path:
+ *
+ * Linear Code of +3dB = 10^(3/20)= 1.412537545
+ * Coeff_X = round (1820 × 1.412537545) = 2571
+ * = 0b001010_00001011
+ * GA_MSB_Transmit = 0b0010100
+ * GA_LSB_Transmit = 0b0001011
+ *
+ * Linear Code of -3.5dB = 10^(-3.5/20) = 0.668343917
+ * Coeff_R= round (2506 × 0.668343917) = 1675
+ * = 0b0001101_0001011
+ * GA_MSB_Receive = 0b0001101
+ * GA_LSB_Receive = 0b0001011
+ */
+
+ conf = IDT821034_MODE_GAIN(ch) | gain_type;
+
+ ret = idt821034_8bit_write(idt821034, conf | 0x00);
+ if (ret)
+ return ret;
+
+ ret = idt821034_8bit_write(idt821034, gain_val & 0x007F);
+ if (ret)
+ return ret;
+
+ ret = idt821034_8bit_write(idt821034, conf | 0x01);
+ if (ret)
+ return ret;
+
+ ret = idt821034_8bit_write(idt821034, (gain_val >> 7) & 0x7F);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/* Id helpers used in controls and dapm */
+#define IDT821034_DIR_OUT (1 << 3)
+#define IDT821034_DIR_IN (0 << 3)
+#define IDT821034_ID(_ch, _dir) (((_ch) & 0x03) | (_dir))
+#define IDT821034_ID_OUT(_ch) IDT821034_ID(_ch, IDT821034_DIR_OUT)
+#define IDT821034_ID_IN(_ch) IDT821034_ID(_ch, IDT821034_DIR_IN)
+
+#define IDT821034_ID_GET_CHAN(_id) ((_id) & 0x03)
+#define IDT821034_ID_GET_DIR(_id) ((_id) & (1 << 3))
+#define IDT821034_ID_IS_OUT(_id) (IDT821034_ID_GET_DIR(_id) == IDT821034_DIR_OUT)
+
+static int idt821034_kctrl_gain_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(component);
+ int min = mc->min;
+ int max = mc->max;
+ unsigned int mask = (1 << fls(max)) - 1;
+ unsigned int invert = mc->invert;
+ int val;
+ u8 ch;
+
+ ch = IDT821034_ID_GET_CHAN(mc->reg);
+
+ mutex_lock(&idt821034->mutex);
+ if (IDT821034_ID_IS_OUT(mc->reg))
+ val = idt821034->amps.ch[ch].amp_out.gain;
+ else
+ val = idt821034->amps.ch[ch].amp_in.gain;
+ mutex_unlock(&idt821034->mutex);
+
+ ucontrol->value.integer.value[0] = val & mask;
+ if (invert)
+ ucontrol->value.integer.value[0] = max - ucontrol->value.integer.value[0];
+ else
+ ucontrol->value.integer.value[0] = ucontrol->value.integer.value[0] - min;
+
+ return 0;
+}
+
+static int idt821034_kctrl_gain_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc = (struct soc_mixer_control *)kcontrol->private_value;
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(component);
+ struct idt821034_amp *amp;
+ int min = mc->min;
+ int max = mc->max;
+ unsigned int mask = (1 << fls(max)) - 1;
+ unsigned int invert = mc->invert;
+ unsigned int val;
+ int ret;
+ u8 gain_type;
+ u8 ch;
+
+ val = ucontrol->value.integer.value[0];
+ if (val < 0)
+ return -EINVAL;
+ if (val > max - min)
+ return -EINVAL;
+
+ if (invert)
+ val = (max - val) & mask;
+ else
+ val = (val + min) & mask;
+
+ ch = IDT821034_ID_GET_CHAN(mc->reg);
+
+ mutex_lock(&idt821034->mutex);
+
+ if (IDT821034_ID_IS_OUT(mc->reg)) {
+ amp = &idt821034->amps.ch[ch].amp_out;
+ gain_type = IDT821034_GAIN_RX;
+ } else {
+ amp = &idt821034->amps.ch[ch].amp_in;
+ gain_type = IDT821034_GAIN_TX;
+ }
+
+ if (!amp->is_muted) {
+ ret = idt821034_set_gain_channel(idt821034, ch, gain_type, val);
+ if (ret)
+ goto end;
+ }
+
+ amp->gain = val;
+ ret = 0;
+end:
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static int idt821034_kctrl_mute_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(component);
+ int id = kcontrol->private_value;
+ bool is_muted;
+ u8 ch;
+
+ ch = IDT821034_ID_GET_CHAN(id);
+
+ mutex_lock(&idt821034->mutex);
+ is_muted = IDT821034_ID_IS_OUT(id) ?
+ idt821034->amps.ch[ch].amp_out.is_muted:
+ idt821034->amps.ch[ch].amp_in.is_muted;
+ mutex_unlock(&idt821034->mutex);
+
+ ucontrol->value.integer.value[0] = !is_muted;
+
+ return 0;
+}
+
+static int idt821034_kctrl_mute_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(component);
+ int id = kcontrol->private_value;
+ struct idt821034_amp *amp;
+ bool is_mute;
+ u8 gain_type;
+ int ret;
+ u8 ch;
+
+ ch = IDT821034_ID_GET_CHAN(id);
+ is_mute = !ucontrol->value.integer.value[0];
+
+ mutex_lock(&idt821034->mutex);
+
+ if (IDT821034_ID_IS_OUT(id)) {
+ amp = &idt821034->amps.ch[ch].amp_out;
+ gain_type = IDT821034_GAIN_RX;
+ } else {
+ amp = &idt821034->amps.ch[ch].amp_in;
+ gain_type = IDT821034_GAIN_TX;
+ }
+
+ ret = idt821034_set_gain_channel(idt821034, ch, gain_type,
+ is_mute ? 0 : amp->gain);
+ if (ret)
+ goto end;
+
+ amp->is_muted = is_mute;
+
+ ret = 0;
+end:
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static const DECLARE_TLV_DB_LINEAR(idt821034_gain_in, -6520, 1306);
+#define IDT821034_GAIN_IN_MIN_RAW 1 /* -65.20 dB -> 10^(-65.2/20.0) * 1820 = 1 */
+#define IDT821034_GAIN_IN_MAX_RAW 8191 /* 13.06 dB -> 10^(13.06/20.0) * 1820 = 8191 */
+#define IDT821034_GAIN_IN_INIT_RAW 1820 /* 0dB -> 10^(0/20) * 1820 = 1820 */
+
+static const DECLARE_TLV_DB_LINEAR(idt821034_gain_out, -6798, 1029);
+#define IDT821034_GAIN_OUT_MIN_RAW 1 /* -67.98 dB -> 10^(-67.98/20.0) * 2506 = 1*/
+#define IDT821034_GAIN_OUT_MAX_RAW 8191 /* 10.29 dB -> 10^(10.29/20.0) * 2506 = 8191 */
+#define IDT821034_GAIN_OUT_INIT_RAW 2506 /* 0dB -> 10^(0/20) * 2506 = 2506 */
+
+static const struct snd_kcontrol_new idt821034_controls[] = {
+ /* DAC volume control */
+ SOC_SINGLE_RANGE_EXT_TLV("DAC0 Playback Volume", IDT821034_ID_OUT(0), 0,
+ IDT821034_GAIN_OUT_MIN_RAW, IDT821034_GAIN_OUT_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_out),
+ SOC_SINGLE_RANGE_EXT_TLV("DAC1 Playback Volume", IDT821034_ID_OUT(1), 0,
+ IDT821034_GAIN_OUT_MIN_RAW, IDT821034_GAIN_OUT_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_out),
+ SOC_SINGLE_RANGE_EXT_TLV("DAC2 Playback Volume", IDT821034_ID_OUT(2), 0,
+ IDT821034_GAIN_OUT_MIN_RAW, IDT821034_GAIN_OUT_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_out),
+ SOC_SINGLE_RANGE_EXT_TLV("DAC3 Playback Volume", IDT821034_ID_OUT(3), 0,
+ IDT821034_GAIN_OUT_MIN_RAW, IDT821034_GAIN_OUT_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_out),
+
+ /* DAC mute control */
+ SOC_SINGLE_BOOL_EXT("DAC0 Playback Switch", IDT821034_ID_OUT(0),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+ SOC_SINGLE_BOOL_EXT("DAC1 Playback Switch", IDT821034_ID_OUT(1),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+ SOC_SINGLE_BOOL_EXT("DAC2 Playback Switch", IDT821034_ID_OUT(2),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+ SOC_SINGLE_BOOL_EXT("DAC3 Playback Switch", IDT821034_ID_OUT(3),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+
+ /* ADC volume control */
+ SOC_SINGLE_RANGE_EXT_TLV("ADC0 Capture Volume", IDT821034_ID_IN(0), 0,
+ IDT821034_GAIN_IN_MIN_RAW, IDT821034_GAIN_IN_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_in),
+ SOC_SINGLE_RANGE_EXT_TLV("ADC1 Capture Volume", IDT821034_ID_IN(1), 0,
+ IDT821034_GAIN_IN_MIN_RAW, IDT821034_GAIN_IN_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_in),
+ SOC_SINGLE_RANGE_EXT_TLV("ADC2 Capture Volume", IDT821034_ID_IN(2), 0,
+ IDT821034_GAIN_IN_MIN_RAW, IDT821034_GAIN_IN_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_in),
+ SOC_SINGLE_RANGE_EXT_TLV("ADC3 Capture Volume", IDT821034_ID_IN(3), 0,
+ IDT821034_GAIN_IN_MIN_RAW, IDT821034_GAIN_IN_MAX_RAW,
+ 0, idt821034_kctrl_gain_get, idt821034_kctrl_gain_put,
+ idt821034_gain_in),
+
+ /* ADC mute control */
+ SOC_SINGLE_BOOL_EXT("ADC0 Capture Switch", IDT821034_ID_IN(0),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+ SOC_SINGLE_BOOL_EXT("ADC1 Capture Switch", IDT821034_ID_IN(1),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+ SOC_SINGLE_BOOL_EXT("ADC2 Capture Switch", IDT821034_ID_IN(2),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+ SOC_SINGLE_BOOL_EXT("ADC3 Capture Switch", IDT821034_ID_IN(3),
+ idt821034_kctrl_mute_get, idt821034_kctrl_mute_put),
+};
+
+static int idt821034_power_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(component);
+ unsigned int id = w->shift;
+ u8 power, mask;
+ int ret;
+ u8 ch;
+
+ ch = IDT821034_ID_GET_CHAN(id);
+ mask = IDT821034_ID_IS_OUT(id) ? IDT821034_CONF_PWRUP_RX : IDT821034_CONF_PWRUP_TX;
+
+ mutex_lock(&idt821034->mutex);
+
+ power = idt821034_get_channel_power(idt821034, ch);
+ if (SND_SOC_DAPM_EVENT_ON(event))
+ power |= mask;
+ else
+ power &= ~mask;
+ ret = idt821034_set_channel_power(idt821034, ch, power);
+
+ mutex_unlock(&idt821034->mutex);
+
+ return ret;
+}
+
+static const struct snd_soc_dapm_widget idt821034_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC_E("DAC0", "Playback", SND_SOC_NOPM, IDT821034_ID_OUT(0), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("DAC1", "Playback", SND_SOC_NOPM, IDT821034_ID_OUT(1), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("DAC2", "Playback", SND_SOC_NOPM, IDT821034_ID_OUT(2), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("DAC3", "Playback", SND_SOC_NOPM, IDT821034_ID_OUT(3), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+
+ SND_SOC_DAPM_OUTPUT("OUT0"),
+ SND_SOC_DAPM_OUTPUT("OUT1"),
+ SND_SOC_DAPM_OUTPUT("OUT2"),
+ SND_SOC_DAPM_OUTPUT("OUT3"),
+
+ SND_SOC_DAPM_DAC_E("ADC0", "Capture", SND_SOC_NOPM, IDT821034_ID_IN(0), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("ADC1", "Capture", SND_SOC_NOPM, IDT821034_ID_IN(1), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("ADC2", "Capture", SND_SOC_NOPM, IDT821034_ID_IN(2), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_DAC_E("ADC3", "Capture", SND_SOC_NOPM, IDT821034_ID_IN(3), 0,
+ idt821034_power_event,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+
+ SND_SOC_DAPM_INPUT("IN0"),
+ SND_SOC_DAPM_INPUT("IN1"),
+ SND_SOC_DAPM_INPUT("IN2"),
+ SND_SOC_DAPM_INPUT("IN3"),
+};
+
+static const struct snd_soc_dapm_route idt821034_dapm_routes[] = {
+ { "OUT0", NULL, "DAC0" },
+ { "OUT1", NULL, "DAC1" },
+ { "OUT2", NULL, "DAC2" },
+ { "OUT3", NULL, "DAC3" },
+
+ { "ADC0", NULL, "IN0" },
+ { "ADC1", NULL, "IN1" },
+ { "ADC2", NULL, "IN2" },
+ { "ADC3", NULL, "IN3" },
+};
+
+static int idt821034_dai_set_tdm_slot(struct snd_soc_dai *dai,
+ unsigned int tx_mask, unsigned int rx_mask,
+ int slots, int width)
+{
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(dai->component);
+ unsigned int mask;
+ u8 slot;
+ int ret;
+ u8 ch;
+
+ switch (width) {
+ case 0: /* Not set -> default 8 */
+ case 8:
+ break;
+ default:
+ dev_err(dai->dev, "tdm slot width %d not supported\n", width);
+ return -EINVAL;
+ }
+
+ mask = tx_mask;
+ slot = 0;
+ ch = 0;
+ while (mask && ch < IDT821034_NB_CHANNEL) {
+ if (mask & 0x1) {
+ mutex_lock(&idt821034->mutex);
+ ret = idt821034_set_channel_ts(idt821034, ch, IDT821034_CH_RX, slot);
+ mutex_unlock(&idt821034->mutex);
+ if (ret) {
+ dev_err(dai->dev, "ch%u set tx tdm slot failed (%d)\n",
+ ch, ret);
+ return ret;
+ }
+ ch++;
+ }
+ mask >>= 1;
+ slot++;
+ }
+ if (mask) {
+ dev_err(dai->dev, "too much tx slots defined (mask = 0x%x) support max %d\n",
+ tx_mask, IDT821034_NB_CHANNEL);
+ return -EINVAL;
+ }
+ idt821034->max_ch_playback = ch;
+
+ mask = rx_mask;
+ slot = 0;
+ ch = 0;
+ while (mask && ch < IDT821034_NB_CHANNEL) {
+ if (mask & 0x1) {
+ mutex_lock(&idt821034->mutex);
+ ret = idt821034_set_channel_ts(idt821034, ch, IDT821034_CH_TX, slot);
+ mutex_unlock(&idt821034->mutex);
+ if (ret) {
+ dev_err(dai->dev, "ch%u set rx tdm slot failed (%d)\n",
+ ch, ret);
+ return ret;
+ }
+ ch++;
+ }
+ mask >>= 1;
+ slot++;
+ }
+ if (mask) {
+ dev_err(dai->dev, "too much rx slots defined (mask = 0x%x) support max %d\n",
+ rx_mask, IDT821034_NB_CHANNEL);
+ return -EINVAL;
+ }
+ idt821034->max_ch_capture = ch;
+
+ return 0;
+}
+
+static int idt821034_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(dai->component);
+ u8 conf;
+ int ret;
+
+ mutex_lock(&idt821034->mutex);
+
+ conf = idt821034_get_codec_conf(idt821034);
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_DSP_A:
+ conf |= IDT821034_CONF_DELAY_MODE;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ conf &= ~IDT821034_CONF_DELAY_MODE;
+ break;
+ default:
+ dev_err(dai->dev, "Unsupported DAI format 0x%x\n",
+ fmt & SND_SOC_DAIFMT_FORMAT_MASK);
+ ret = -EINVAL;
+ goto end;
+ }
+ ret = idt821034_set_codec_conf(idt821034, conf);
+end:
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static int idt821034_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(dai->component);
+ u8 conf;
+ int ret;
+
+ mutex_lock(&idt821034->mutex);
+
+ conf = idt821034_get_codec_conf(idt821034);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_A_LAW:
+ conf |= IDT821034_CONF_ALAW_MODE;
+ break;
+ case SNDRV_PCM_FORMAT_MU_LAW:
+ conf &= ~IDT821034_CONF_ALAW_MODE;
+ break;
+ default:
+ dev_err(dai->dev, "Unsupported PCM format 0x%x\n",
+ params_format(params));
+ ret = -EINVAL;
+ goto end;
+ }
+ ret = idt821034_set_codec_conf(idt821034, conf);
+end:
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static const unsigned int idt821034_sample_bits[] = {8};
+
+static struct snd_pcm_hw_constraint_list idt821034_sample_bits_constr = {
+ .list = idt821034_sample_bits,
+ .count = ARRAY_SIZE(idt821034_sample_bits),
+};
+
+static int idt821034_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(dai->component);
+ unsigned int max_ch = 0;
+ int ret;
+
+ max_ch = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ idt821034->max_ch_playback : idt821034->max_ch_capture;
+
+ /*
+ * Disable stream support (min = 0, max = 0) if no timeslots were
+ * configured otherwise, limit the number of channels to those
+ * configured.
+ */
+ ret = snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
+ max_ch ? 1 : 0, max_ch);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+ &idt821034_sample_bits_constr);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static u64 idt821034_dai_formats[] = {
+ SND_SOC_POSSIBLE_DAIFMT_DSP_A |
+ SND_SOC_POSSIBLE_DAIFMT_DSP_B,
+};
+
+static const struct snd_soc_dai_ops idt821034_dai_ops = {
+ .startup = idt821034_dai_startup,
+ .hw_params = idt821034_dai_hw_params,
+ .set_tdm_slot = idt821034_dai_set_tdm_slot,
+ .set_fmt = idt821034_dai_set_fmt,
+ .auto_selectable_formats = idt821034_dai_formats,
+ .num_auto_selectable_formats = ARRAY_SIZE(idt821034_dai_formats),
+};
+
+static struct snd_soc_dai_driver idt821034_dai_driver = {
+ .name = "idt821034",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = IDT821034_NB_CHANNEL,
+ .rates = SNDRV_PCM_RATE_8000,
+ .formats = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = IDT821034_NB_CHANNEL,
+ .rates = SNDRV_PCM_RATE_8000,
+ .formats = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
+ },
+ .ops = &idt821034_dai_ops,
+};
+
+static int idt821034_reset_audio(struct idt821034 *idt821034)
+{
+ int ret;
+ u8 i;
+
+ mutex_lock(&idt821034->mutex);
+
+ ret = idt821034_set_codec_conf(idt821034, 0);
+ if (ret)
+ goto end;
+
+ for (i = 0; i < IDT821034_NB_CHANNEL; i++) {
+ idt821034->amps.ch[i].amp_out.gain = IDT821034_GAIN_OUT_INIT_RAW;
+ idt821034->amps.ch[i].amp_out.is_muted = false;
+ ret = idt821034_set_gain_channel(idt821034, i, IDT821034_GAIN_RX,
+ idt821034->amps.ch[i].amp_out.gain);
+ if (ret)
+ goto end;
+
+ idt821034->amps.ch[i].amp_in.gain = IDT821034_GAIN_IN_INIT_RAW;
+ idt821034->amps.ch[i].amp_in.is_muted = false;
+ ret = idt821034_set_gain_channel(idt821034, i, IDT821034_GAIN_TX,
+ idt821034->amps.ch[i].amp_in.gain);
+ if (ret)
+ goto end;
+
+ ret = idt821034_set_channel_power(idt821034, i, 0);
+ if (ret)
+ goto end;
+ }
+
+ ret = 0;
+end:
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static int idt821034_component_probe(struct snd_soc_component *component)
+{
+ struct idt821034 *idt821034 = snd_soc_component_get_drvdata(component);
+ int ret;
+
+ /* reset idt821034 audio part*/
+ ret = idt821034_reset_audio(idt821034);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver idt821034_component_driver = {
+ .probe = idt821034_component_probe,
+ .controls = idt821034_controls,
+ .num_controls = ARRAY_SIZE(idt821034_controls),
+ .dapm_widgets = idt821034_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(idt821034_dapm_widgets),
+ .dapm_routes = idt821034_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(idt821034_dapm_routes),
+ .endianness = 1,
+};
+
+#if IS_ENABLED(CONFIG_GPIOLIB)
+#define IDT821034_GPIO_OFFSET_TO_SLIC_CHANNEL(_offset) (((_offset) / 5) % 4)
+#define IDT821034_GPIO_OFFSET_TO_SLIC_MASK(_offset) BIT((_offset) % 5)
+
+static void idt821034_chip_gpio_set(struct gpio_chip *c, unsigned int offset, int val)
+{
+ u8 ch = IDT821034_GPIO_OFFSET_TO_SLIC_CHANNEL(offset);
+ u8 mask = IDT821034_GPIO_OFFSET_TO_SLIC_MASK(offset);
+ struct idt821034 *idt821034 = gpiochip_get_data(c);
+ u8 slic_raw;
+ int ret;
+
+ mutex_lock(&idt821034->mutex);
+
+ slic_raw = idt821034_get_written_slic_raw(idt821034, ch);
+ if (val)
+ slic_raw |= mask;
+ else
+ slic_raw &= ~mask;
+ ret = idt821034_write_slic_raw(idt821034, ch, slic_raw);
+ if (ret) {
+ dev_err(&idt821034->spi->dev, "set gpio %d (%u, 0x%x) failed (%d)\n",
+ offset, ch, mask, ret);
+ }
+
+ mutex_unlock(&idt821034->mutex);
+}
+
+static int idt821034_chip_gpio_get(struct gpio_chip *c, unsigned int offset)
+{
+ u8 ch = IDT821034_GPIO_OFFSET_TO_SLIC_CHANNEL(offset);
+ u8 mask = IDT821034_GPIO_OFFSET_TO_SLIC_MASK(offset);
+ struct idt821034 *idt821034 = gpiochip_get_data(c);
+ u8 slic_raw;
+ int ret;
+
+ mutex_lock(&idt821034->mutex);
+ ret = idt821034_read_slic_raw(idt821034, ch, &slic_raw);
+ mutex_unlock(&idt821034->mutex);
+ if (ret) {
+ dev_err(&idt821034->spi->dev, "get gpio %d (%u, 0x%x) failed (%d)\n",
+ offset, ch, mask, ret);
+ return ret;
+ }
+
+ /*
+ * SLIC IOs are read in reverse order compared to write.
+ * Reverse the read value here in order to have IO0 at lsb (ie same
+ * order as write)
+ */
+ return !!(bitrev8(slic_raw) & mask);
+}
+
+static int idt821034_chip_get_direction(struct gpio_chip *c, unsigned int offset)
+{
+ u8 ch = IDT821034_GPIO_OFFSET_TO_SLIC_CHANNEL(offset);
+ u8 mask = IDT821034_GPIO_OFFSET_TO_SLIC_MASK(offset);
+ struct idt821034 *idt821034 = gpiochip_get_data(c);
+ u8 slic_dir;
+
+ mutex_lock(&idt821034->mutex);
+ slic_dir = idt821034_get_slic_conf(idt821034, ch);
+ mutex_unlock(&idt821034->mutex);
+
+ return slic_dir & mask ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT;
+}
+
+static int idt821034_chip_direction_input(struct gpio_chip *c, unsigned int offset)
+{
+ u8 ch = IDT821034_GPIO_OFFSET_TO_SLIC_CHANNEL(offset);
+ u8 mask = IDT821034_GPIO_OFFSET_TO_SLIC_MASK(offset);
+ struct idt821034 *idt821034 = gpiochip_get_data(c);
+ u8 slic_conf;
+ int ret;
+
+ /* Only IO0 and IO1 can be set as input */
+ if (mask & ~(IDT821034_SLIC_IO1_IN | IDT821034_SLIC_IO0_IN))
+ return -EPERM;
+
+ mutex_lock(&idt821034->mutex);
+
+ slic_conf = idt821034_get_slic_conf(idt821034, ch) | mask;
+
+ ret = idt821034_set_slic_conf(idt821034, ch, slic_conf);
+ if (ret) {
+ dev_err(&idt821034->spi->dev, "dir in gpio %d (%u, 0x%x) failed (%d)\n",
+ offset, ch, mask, ret);
+ }
+
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static int idt821034_chip_direction_output(struct gpio_chip *c, unsigned int offset, int val)
+{
+ u8 ch = IDT821034_GPIO_OFFSET_TO_SLIC_CHANNEL(offset);
+ u8 mask = IDT821034_GPIO_OFFSET_TO_SLIC_MASK(offset);
+ struct idt821034 *idt821034 = gpiochip_get_data(c);
+ u8 slic_conf;
+ int ret;
+
+ idt821034_chip_gpio_set(c, offset, val);
+
+ mutex_lock(&idt821034->mutex);
+
+ slic_conf = idt821034_get_slic_conf(idt821034, ch) & ~mask;
+
+ ret = idt821034_set_slic_conf(idt821034, ch, slic_conf);
+ if (ret) {
+ dev_err(&idt821034->spi->dev, "dir in gpio %d (%u, 0x%x) failed (%d)\n",
+ offset, ch, mask, ret);
+ }
+
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static int idt821034_reset_gpio(struct idt821034 *idt821034)
+{
+ int ret;
+ u8 i;
+
+ mutex_lock(&idt821034->mutex);
+
+ /* IO0 and IO1 as input for all channels and output IO set to 0 */
+ for (i = 0; i < IDT821034_NB_CHANNEL; i++) {
+ ret = idt821034_set_slic_conf(idt821034, i,
+ IDT821034_SLIC_IO1_IN | IDT821034_SLIC_IO0_IN);
+ if (ret)
+ goto end;
+
+ ret = idt821034_write_slic_raw(idt821034, i, 0);
+ if (ret)
+ goto end;
+
+ }
+ ret = 0;
+end:
+ mutex_unlock(&idt821034->mutex);
+ return ret;
+}
+
+static int idt821034_gpio_init(struct idt821034 *idt821034)
+{
+ int ret;
+
+ ret = idt821034_reset_gpio(idt821034);
+ if (ret)
+ return ret;
+
+ idt821034->gpio_chip.owner = THIS_MODULE;
+ idt821034->gpio_chip.label = dev_name(&idt821034->spi->dev);
+ idt821034->gpio_chip.parent = &idt821034->spi->dev;
+ idt821034->gpio_chip.base = -1;
+ idt821034->gpio_chip.ngpio = 5 * 4; /* 5 GPIOs on 4 channels */
+ idt821034->gpio_chip.get_direction = idt821034_chip_get_direction;
+ idt821034->gpio_chip.direction_input = idt821034_chip_direction_input;
+ idt821034->gpio_chip.direction_output = idt821034_chip_direction_output;
+ idt821034->gpio_chip.get = idt821034_chip_gpio_get;
+ idt821034->gpio_chip.set = idt821034_chip_gpio_set;
+ idt821034->gpio_chip.can_sleep = true;
+
+ return devm_gpiochip_add_data(&idt821034->spi->dev, &idt821034->gpio_chip,
+ idt821034);
+}
+#else /* IS_ENABLED(CONFIG_GPIOLIB) */
+static int idt821034_gpio_init(struct idt821034 *idt821034)
+{
+ return 0;
+}
+#endif
+
+static int idt821034_spi_probe(struct spi_device *spi)
+{
+ struct idt821034 *idt821034;
+ int ret;
+
+ spi->bits_per_word = 8;
+ ret = spi_setup(spi);
+ if (ret < 0)
+ return ret;
+
+ idt821034 = devm_kzalloc(&spi->dev, sizeof(*idt821034), GFP_KERNEL);
+ if (!idt821034)
+ return -ENOMEM;
+
+ idt821034->spi = spi;
+
+ mutex_init(&idt821034->mutex);
+
+ spi_set_drvdata(spi, idt821034);
+
+ ret = devm_snd_soc_register_component(&spi->dev, &idt821034_component_driver,
+ &idt821034_dai_driver, 1);
+ if (ret)
+ return ret;
+
+ ret = idt821034_gpio_init(idt821034);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct of_device_id idt821034_of_match[] = {
+ { .compatible = "renesas,idt821034", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, idt821034_of_match);
+
+static const struct spi_device_id idt821034_id_table[] = {
+ { "idt821034", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, idt821034_id_table);
+
+static struct spi_driver idt821034_spi_driver = {
+ .driver = {
+ .name = "idt821034",
+ .of_match_table = idt821034_of_match,
+ },
+ .id_table = idt821034_id_table,
+ .probe = idt821034_spi_probe,
+};
+
+module_spi_driver(idt821034_spi_driver);
+
+MODULE_AUTHOR("Herve Codina <herve.codina@bootlin.com>");
+MODULE_DESCRIPTION("IDT821034 ALSA SoC driver");
+MODULE_LICENSE("GPL");
--
2.39.0