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-rw-r--r--Documentation/devicetree/bindings/sound/neofidelity,ntp8835.yaml73
-rw-r--r--Documentation/devicetree/bindings/sound/neofidelity,ntp8918.yaml70
-rw-r--r--Documentation/devicetree/bindings/vendor-prefixes.yaml2
-rw-r--r--sound/soc/codecs/Kconfig13
-rw-r--r--sound/soc/codecs/Makefile6
-rw-r--r--sound/soc/codecs/ntp8835.c480
-rw-r--r--sound/soc/codecs/ntp8918.c397
-rw-r--r--sound/soc/codecs/ntpfw.c137
-rw-r--r--sound/soc/codecs/ntpfw.h23
9 files changed, 1201 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/neofidelity,ntp8835.yaml b/Documentation/devicetree/bindings/sound/neofidelity,ntp8835.yaml
new file mode 100644
index 000000000000..44d72a2ddfc9
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/neofidelity,ntp8835.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/neofidelity,ntp8835.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NeoFidelity NTP8835/NTP8835C Amplifiers
+
+maintainers:
+ - Igor Prusov <ivprusov@salutedevices.com>
+
+description: |
+ The NTP8835 is a single chip full digital audio amplifier
+ including power stages for stereo amplifier systems.
+ NTP8835 is integrated with versatile digital audio signal
+ processing functions, high-performance, high-fidelity fully
+ digital PWM modulator and two high-power full-bridge MOSFET
+ power stages. NTP8835C has identical programming interface,
+ but has different output signal characteristics.
+
+allOf:
+ - $ref: dai-common.yaml#
+
+properties:
+ compatible:
+ enum:
+ - neofidelity,ntp8835
+ - neofidelity,ntp8835c
+
+ reg:
+ enum:
+ - 0x2a
+ - 0x2b
+ - 0x2c
+ - 0x2d
+
+ reset-gpios:
+ maxItems: 1
+
+ '#sound-dai-cells':
+ const: 0
+
+ clocks:
+ maxItems: 4
+
+ clock-names:
+ items:
+ - const: wck
+ - const: bck
+ - const: scl
+ - const: mclk
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ audio-codec@2b {
+ compatible = "neofidelity,ntp8835";
+ #sound-dai-cells = <0>;
+ reg = <0x2b>;
+ reset-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+ clocks = <&clkc 551>, <&clkc 552>, <&clkc 553>, <&clkc 554>;
+ clock-names = "wck", "bck", "scl", "mclk";
+ };
+ };
diff --git a/Documentation/devicetree/bindings/sound/neofidelity,ntp8918.yaml b/Documentation/devicetree/bindings/sound/neofidelity,ntp8918.yaml
new file mode 100644
index 000000000000..952768b35902
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/neofidelity,ntp8918.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/neofidelity,ntp8918.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NeoFidelity NTP8918 Amplifier
+
+maintainers:
+ - Igor Prusov <ivprusov@salutedevices.com>
+
+description:
+ The NTP8918 is a single chip full digital audio amplifier
+ including power stage for stereo amplifier system.
+ The NTP8918 is integrated with versatile digital audio signal
+ processing functions, high-performance, high-fidelity fully
+ digital PWM modulator and two high-power full-bridge MOSFET
+ power stages.
+
+allOf:
+ - $ref: dai-common.yaml#
+
+properties:
+ compatible:
+ enum:
+ - neofidelity,ntp8918
+
+ reg:
+ enum:
+ - 0x2a
+ - 0x2b
+ - 0x2c
+ - 0x2d
+
+ reset-gpios:
+ maxItems: 1
+
+ '#sound-dai-cells':
+ const: 0
+
+ clocks:
+ maxItems: 3
+
+ clock-names:
+ items:
+ - const: wck
+ - const: scl
+ - const: bck
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ audio-codec@2a {
+ compatible = "neofidelity,ntp8918";
+ #sound-dai-cells = <0>;
+ reg = <0x2a>;
+ clocks = <&clkc 150>, <&clkc 151>, <&clkc 152>;
+ clock-names = "wck", "scl", "bck";
+ reset-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index b320a39de7fe..fbfce9b4ae6b 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1013,6 +1013,8 @@ patternProperties:
description: Shanghai Neardi Technology Co., Ltd.
"^nec,.*":
description: NEC LCD Technologies, Ltd.
+ "^neofidelity,.*":
+ description: Neofidelity Inc.
"^neonode,.*":
description: Neonode Inc.
"^netgear,.*":
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 7092842480ef..c6c4c7481b4c 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -2565,6 +2565,19 @@ config SND_SOC_NAU8825
tristate
depends on I2C
+config SND_SOC_NTPFW
+ tristate
+
+config SND_SOC_NTP8918
+ select SND_SOC_NTPFW
+ tristate "NeoFidelity NTP8918 amplifier"
+ depends on I2C
+
+config SND_SOC_NTP8835
+ select SND_SOC_NTPFW
+ tristate "NeoFidelity NTP8835 and NTP8835C amplifiers"
+ depends on I2C
+
config SND_SOC_TPA6130A2
tristate "Texas Instruments TPA6130A2 headphone amplifier"
depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 54cbc3feae32..850c6249e3df 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -189,6 +189,9 @@ snd-soc-nau8821-y := nau8821.o
snd-soc-nau8822-y := nau8822.o
snd-soc-nau8824-y := nau8824.o
snd-soc-nau8825-y := nau8825.o
+snd-soc-ntp8835-y := ntp8835.o
+snd-soc-ntp8918-y := ntp8918.o
+snd-soc-ntpfw-y := ntpfw.o
snd-soc-hdmi-codec-y := hdmi-codec.o
snd-soc-pcm1681-y := pcm1681.o
snd-soc-pcm1789-codec-y := pcm1789.o
@@ -591,6 +594,9 @@ obj-$(CONFIG_SND_SOC_NAU8821) += snd-soc-nau8821.o
obj-$(CONFIG_SND_SOC_NAU8822) += snd-soc-nau8822.o
obj-$(CONFIG_SND_SOC_NAU8824) += snd-soc-nau8824.o
obj-$(CONFIG_SND_SOC_NAU8825) += snd-soc-nau8825.o
+obj-$(CONFIG_SND_SOC_NTP8835) += snd-soc-ntp8835.o
+obj-$(CONFIG_SND_SOC_NTP8918) += snd-soc-ntp8918.o
+obj-$(CONFIG_SND_SOC_NTPFW) += snd-soc-ntpfw.o
obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o
obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o
obj-$(CONFIG_SND_SOC_PCM179X) += snd-soc-pcm179x-codec.o
diff --git a/sound/soc/codecs/ntp8835.c b/sound/soc/codecs/ntp8835.c
new file mode 100644
index 000000000000..97056d8de2bb
--- /dev/null
+++ b/sound/soc/codecs/ntp8835.c
@@ -0,0 +1,480 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for the NTP8835/NTP8835C Audio Amplifiers
+ *
+ * Copyright (c) 2024, SaluteDevices. All Rights Reserved.
+ *
+ * Author: Igor Prusov <ivprusov@salutedevices.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/bits.h>
+#include <linux/reset.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+
+#include <sound/initval.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-component.h>
+#include <sound/tlv.h>
+
+#include "ntpfw.h"
+
+#define NTP8835_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+#define NTP8835_INPUT_FMT 0x0
+#define NTP8835_INPUT_FMT_MASTER_MODE BIT(0)
+#define NTP8835_INPUT_FMT_GSA_MODE BIT(1)
+#define NTP8835_GSA_FMT 0x1
+#define NTP8835_GSA_BS_MASK GENMASK(3, 2)
+#define NTP8835_GSA_BS(x) ((x) << 2)
+#define NTP8835_GSA_RIGHT_J BIT(0)
+#define NTP8835_GSA_LSB BIT(1)
+#define NTP8835_MCLK_FREQ_CTRL 0x2
+#define NTP8835_MCLK_FREQ_MCF GENMASK(1, 0)
+#define NTP8835_SOFT_MUTE 0x26
+#define NTP8835_SOFT_MUTE_SM1 BIT(0)
+#define NTP8835_SOFT_MUTE_SM2 BIT(1)
+#define NTP8835_SOFT_MUTE_SM3 BIT(2)
+#define NTP8835_PWM_SWITCH 0x27
+#define NTP8835_PWM_SWITCH_POF1 BIT(0)
+#define NTP8835_PWM_SWITCH_POF2 BIT(1)
+#define NTP8835_PWM_SWITCH_POF3 BIT(2)
+#define NTP8835_PWM_MASK_CTRL0 0x28
+#define NTP8835_PWM_MASK_CTRL0_OUT_LOW BIT(1)
+#define NTP8835_PWM_MASK_CTRL0_FPMLD BIT(2)
+#define NTP8835_MASTER_VOL 0x2e
+#define NTP8835_CHNL_A_VOL 0x2f
+#define NTP8835_CHNL_B_VOL 0x30
+#define NTP8835_CHNL_C_VOL 0x31
+#define REG_MAX NTP8835_CHNL_C_VOL
+
+#define NTP8835_FW_NAME "eq_8835.bin"
+#define NTP8835_FW_MAGIC 0x38383335 /* "8835" */
+
+struct ntp8835_priv {
+ struct i2c_client *i2c;
+ struct reset_control *reset;
+ unsigned int format;
+ struct clk *mclk;
+ unsigned int mclk_rate;
+};
+
+static const DECLARE_TLV_DB_RANGE(ntp8835_vol_scale,
+ 0, 1, TLV_DB_SCALE_ITEM(-15000, 0, 0),
+ 2, 6, TLV_DB_SCALE_ITEM(-15000, 1000, 0),
+ 7, 0xff, TLV_DB_SCALE_ITEM(-10000, 50, 0),
+);
+
+static int ntp8835_mute_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->access =
+ (SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE);
+ uinfo->count = 1;
+
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+ uinfo->value.integer.step = 1;
+
+ return 0;
+}
+
+static int ntp8835_mute_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ unsigned int val;
+
+ val = snd_soc_component_read(component, NTP8835_SOFT_MUTE);
+
+ ucontrol->value.integer.value[0] = val ? 0 : 1;
+ return 0;
+}
+
+static int ntp8835_mute_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ unsigned int val;
+
+ val = ucontrol->value.integer.value[0] ? 0 : 7;
+
+ snd_soc_component_write(component, NTP8835_SOFT_MUTE, val);
+
+ return 0;
+}
+
+static const struct snd_kcontrol_new ntp8835_vol_control[] = {
+ SOC_SINGLE_TLV("Playback Volume", NTP8835_MASTER_VOL, 0,
+ 0xff, 0, ntp8835_vol_scale),
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Playback Switch",
+ .info = ntp8835_mute_info,
+ .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .get = ntp8835_mute_get,
+ .put = ntp8835_mute_put,
+ },
+};
+
+static void ntp8835_reset_gpio(struct ntp8835_priv *ntp8835)
+{
+ /*
+ * Proper initialization sequence for NTP835 amplifier requires driving
+ * /RESET signal low during power up for at least 0.1us. The sequence is,
+ * according to NTP8835 datasheet, 6.2 Timing Sequence (recommended):
+ * Deassert for T2 >= 1ms...
+ */
+ reset_control_deassert(ntp8835->reset);
+ fsleep(1000);
+
+ /* ...Assert for T3 >= 0.1us... */
+ reset_control_assert(ntp8835->reset);
+ fsleep(1);
+
+ /* ...Deassert, and wait for T4 >= 0.5ms before sound on sequence. */
+ reset_control_deassert(ntp8835->reset);
+ fsleep(500);
+}
+
+static const struct reg_sequence ntp8835_sound_on[] = {
+ { NTP8835_PWM_MASK_CTRL0, NTP8835_PWM_MASK_CTRL0_FPMLD },
+ { NTP8835_PWM_SWITCH, 0x00 },
+ { NTP8835_SOFT_MUTE, 0x00 },
+};
+
+static const struct reg_sequence ntp8835_sound_off[] = {
+ { NTP8835_SOFT_MUTE, NTP8835_SOFT_MUTE_SM1 |
+ NTP8835_SOFT_MUTE_SM2 |
+ NTP8835_SOFT_MUTE_SM3 },
+
+ { NTP8835_PWM_SWITCH, NTP8835_PWM_SWITCH_POF1 |
+ NTP8835_PWM_SWITCH_POF2 |
+ NTP8835_PWM_SWITCH_POF3 },
+
+ { NTP8835_PWM_MASK_CTRL0, NTP8835_PWM_MASK_CTRL0_OUT_LOW |
+ NTP8835_PWM_MASK_CTRL0_FPMLD },
+};
+
+static int ntp8835_load_firmware(struct ntp8835_priv *ntp8835)
+{
+ int ret;
+
+ ret = ntpfw_load(ntp8835->i2c, NTP8835_FW_NAME, NTP8835_FW_MAGIC);
+ if (ret == -ENOENT) {
+ dev_warn_once(&ntp8835->i2c->dev,
+ "Could not find firmware %s\n", NTP8835_FW_NAME);
+ return 0;
+ }
+
+ return ret;
+}
+
+static int ntp8835_snd_suspend(struct snd_soc_component *component)
+{
+ struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
+
+ regcache_cache_only(component->regmap, true);
+
+ regmap_multi_reg_write_bypassed(component->regmap,
+ ntp8835_sound_off,
+ ARRAY_SIZE(ntp8835_sound_off));
+
+ /*
+ * According to NTP8835 datasheet, 6.2 Timing Sequence (recommended):
+ * wait after sound off for T6 >= 0.5ms
+ */
+ fsleep(500);
+ reset_control_assert(ntp8835->reset);
+
+ regcache_mark_dirty(component->regmap);
+ clk_disable_unprepare(ntp8835->mclk);
+
+ return 0;
+}
+
+static int ntp8835_snd_resume(struct snd_soc_component *component)
+{
+ struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
+ int ret;
+
+ ntp8835_reset_gpio(ntp8835);
+ ret = clk_prepare_enable(ntp8835->mclk);
+ if (ret)
+ return ret;
+
+ regmap_multi_reg_write_bypassed(component->regmap,
+ ntp8835_sound_on,
+ ARRAY_SIZE(ntp8835_sound_on));
+
+ ret = ntp8835_load_firmware(ntp8835);
+ if (ret) {
+ dev_err(&ntp8835->i2c->dev, "Failed to load firmware\n");
+ return ret;
+ }
+
+ regcache_cache_only(component->regmap, false);
+ snd_soc_component_cache_sync(component);
+
+ return 0;
+}
+
+static int ntp8835_probe(struct snd_soc_component *component)
+{
+ int ret;
+ struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
+ struct device *dev = component->dev;
+
+ ret = snd_soc_add_component_controls(component, ntp8835_vol_control,
+ ARRAY_SIZE(ntp8835_vol_control));
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to add controls\n");
+
+ ret = ntp8835_load_firmware(ntp8835);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to load firmware\n");
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget ntp8835_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("AIFIN", "Playback", SND_SOC_NOPM, 0, 0),
+
+ SND_SOC_DAPM_OUTPUT("OUT1"),
+ SND_SOC_DAPM_OUTPUT("OUT2"),
+ SND_SOC_DAPM_OUTPUT("OUT3"),
+};
+
+static const struct snd_soc_dapm_route ntp8835_dapm_routes[] = {
+ { "OUT1", NULL, "AIFIN" },
+ { "OUT2", NULL, "AIFIN" },
+ { "OUT3", NULL, "AIFIN" },
+};
+
+static int ntp8835_set_component_sysclk(struct snd_soc_component *component,
+ int clk_id, int source,
+ unsigned int freq, int dir)
+{
+ struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
+
+ switch (freq) {
+ case 12288000:
+ case 24576000:
+ case 18432000:
+ ntp8835->mclk_rate = freq;
+ break;
+ default:
+ ntp8835->mclk_rate = 0;
+ dev_err(component->dev, "Unsupported MCLK value: %u", freq);
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver soc_component_ntp8835 = {
+ .probe = ntp8835_probe,
+ .suspend = ntp8835_snd_suspend,
+ .resume = ntp8835_snd_resume,
+ .dapm_widgets = ntp8835_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ntp8835_dapm_widgets),
+ .dapm_routes = ntp8835_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(ntp8835_dapm_routes),
+ .set_sysclk = ntp8835_set_component_sysclk,
+};
+
+static int ntp8835_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 ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
+ unsigned int input_fmt = 0;
+ unsigned int gsa_fmt = 0;
+ unsigned int gsa_fmt_mask;
+ unsigned int mcf;
+ int ret;
+
+ switch (ntp8835->mclk_rate) {
+ case 12288000:
+ mcf = 0;
+ break;
+ case 24576000:
+ mcf = 1;
+ break;
+ case 18432000:
+ mcf = 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = snd_soc_component_update_bits(component, NTP8835_MCLK_FREQ_CTRL,
+ NTP8835_MCLK_FREQ_MCF, mcf);
+ if (ret)
+ return ret;
+
+ switch (ntp8835->format) {
+ case SND_SOC_DAIFMT_I2S:
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ input_fmt |= NTP8835_INPUT_FMT_GSA_MODE;
+ gsa_fmt |= NTP8835_GSA_RIGHT_J;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ input_fmt |= NTP8835_INPUT_FMT_GSA_MODE;
+ break;
+ }
+
+ ret = snd_soc_component_update_bits(component, NTP8835_INPUT_FMT,
+ NTP8835_INPUT_FMT_MASTER_MODE |
+ NTP8835_INPUT_FMT_GSA_MODE,
+ input_fmt);
+
+ if (!(input_fmt & NTP8835_INPUT_FMT_GSA_MODE) || ret < 0)
+ return ret;
+
+ switch (params_width(params)) {
+ case 24:
+ gsa_fmt |= NTP8835_GSA_BS(0);
+ break;
+ case 20:
+ gsa_fmt |= NTP8835_GSA_BS(1);
+ break;
+ case 18:
+ gsa_fmt |= NTP8835_GSA_BS(2);
+ break;
+ case 16:
+ gsa_fmt |= NTP8835_GSA_BS(3);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ gsa_fmt_mask = NTP8835_GSA_BS_MASK |
+ NTP8835_GSA_RIGHT_J |
+ NTP8835_GSA_LSB;
+ return snd_soc_component_update_bits(component, NTP8835_GSA_FMT,
+ gsa_fmt_mask, gsa_fmt);
+}
+
+static int ntp8835_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ntp8835_priv *ntp8835 = snd_soc_component_get_drvdata(component);
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ case SND_SOC_DAIFMT_LEFT_J:
+ ntp8835->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+};
+
+static const struct snd_soc_dai_ops ntp8835_dai_ops = {
+ .hw_params = ntp8835_hw_params,
+ .set_fmt = ntp8835_set_fmt,
+};
+
+static struct snd_soc_dai_driver ntp8835_dai = {
+ .name = "ntp8835-amplifier",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 3,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = NTP8835_FORMATS,
+ },
+ .ops = &ntp8835_dai_ops,
+};
+
+static const struct regmap_config ntp8835_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = REG_MAX,
+ .cache_type = REGCACHE_MAPLE,
+};
+
+static int ntp8835_i2c_probe(struct i2c_client *i2c)
+{
+ struct ntp8835_priv *ntp8835;
+ struct regmap *regmap;
+ int ret;
+
+ ntp8835 = devm_kzalloc(&i2c->dev, sizeof(*ntp8835), GFP_KERNEL);
+ if (!ntp8835)
+ return -ENOMEM;
+
+ ntp8835->i2c = i2c;
+
+ ntp8835->reset = devm_reset_control_get_shared(&i2c->dev, NULL);
+ if (IS_ERR(ntp8835->reset))
+ return dev_err_probe(&i2c->dev, PTR_ERR(ntp8835->reset),
+ "Failed to get reset\n");
+
+ ret = reset_control_deassert(ntp8835->reset);
+ if (ret)
+ return dev_err_probe(&i2c->dev, PTR_ERR(ntp8835->reset),
+ "Failed to deassert reset\n");
+
+ dev_set_drvdata(&i2c->dev, ntp8835);
+
+ ntp8835_reset_gpio(ntp8835);
+
+ regmap = devm_regmap_init_i2c(i2c, &ntp8835_regmap);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
+ "Failed to allocate regmap\n");
+
+ ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_ntp8835,
+ &ntp8835_dai, 1);
+ if (ret)
+ return dev_err_probe(&i2c->dev, ret,
+ "Failed to register component\n");
+
+ ntp8835->mclk = devm_clk_get_enabled(&i2c->dev, "mclk");
+ if (IS_ERR(ntp8835->mclk))
+ return dev_err_probe(&i2c->dev, PTR_ERR(ntp8835->mclk), "failed to get mclk\n");
+
+ return 0;
+}
+
+static const struct i2c_device_id ntp8835_i2c_id[] = {
+ { "ntp8835", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ntp8835_i2c_id);
+
+static const struct of_device_id ntp8835_of_match[] = {
+ {.compatible = "neofidelity,ntp8835",},
+ {}
+};
+MODULE_DEVICE_TABLE(of, ntp8835_of_match);
+
+static struct i2c_driver ntp8835_i2c_driver = {
+ .probe = ntp8835_i2c_probe,
+ .id_table = ntp8835_i2c_id,
+ .driver = {
+ .name = "ntp8835",
+ .of_match_table = ntp8835_of_match,
+ },
+};
+module_i2c_driver(ntp8835_i2c_driver);
+
+MODULE_AUTHOR("Igor Prusov <ivprusov@salutedevices.com>");
+MODULE_DESCRIPTION("NTP8835 Audio Amplifier Driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/ntp8918.c b/sound/soc/codecs/ntp8918.c
new file mode 100644
index 000000000000..0493ab6acbe4
--- /dev/null
+++ b/sound/soc/codecs/ntp8918.c
@@ -0,0 +1,397 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for the NTP8918 Audio Amplifier
+ *
+ * Copyright (c) 2024, SaluteDevices. All Rights Reserved.
+ *
+ * Author: Igor Prusov <ivprusov@salutedevices.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+
+#include <sound/initval.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-component.h>
+#include <sound/tlv.h>
+
+#include "ntpfw.h"
+
+#define NTP8918_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
+
+#define NTP8918_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+#define NTP8918_INPUT_FMT 0x0
+#define NTP8918_INPUT_FMT_MASTER_MODE BIT(0)
+#define NTP8918_INPUT_FMT_GSA_MODE BIT(1)
+#define NTP8918_GSA_FMT 0x1
+#define NTP8918_GSA_BS_MASK GENMASK(3, 2)
+#define NTP8918_GSA_BS(x) ((x) << 2)
+#define NTP8918_GSA_RIGHT_J BIT(0)
+#define NTP8918_GSA_LSB BIT(1)
+#define NTP8918_MCLK_FREQ_CTRL 0x2
+#define NTP8918_MCLK_FREQ_MCF GENMASK(1, 0)
+#define NTP8918_MASTER_VOL 0x0C
+#define NTP8918_CHNL_A_VOL 0x17
+#define NTP8918_CHNL_B_VOL 0x18
+#define NTP8918_SOFT_MUTE 0x33
+#define NTP8918_SOFT_MUTE_SM1 BIT(0)
+#define NTP8918_SOFT_MUTE_SM2 BIT(1)
+#define NTP8918_PWM_SWITCH 0x34
+#define NTP8918_PWM_MASK_CTRL0 0x35
+#define REG_MAX NTP8918_PWM_MASK_CTRL0
+
+#define NTP8918_FW_NAME "eq_8918.bin"
+#define NTP8918_FW_MAGIC 0x38393138 /* "8918" */
+
+struct ntp8918_priv {
+ struct i2c_client *i2c;
+ struct clk *bck;
+ struct reset_control *reset;
+ unsigned int format;
+};
+
+static const DECLARE_TLV_DB_SCALE(ntp8918_master_vol_scale, -12550, 50, 0);
+
+static const struct snd_kcontrol_new ntp8918_vol_control[] = {
+ SOC_SINGLE_RANGE_TLV("Playback Volume", NTP8918_MASTER_VOL, 0,
+ 0x04, 0xff, 0, ntp8918_master_vol_scale),
+ SOC_SINGLE("Playback Switch", NTP8918_PWM_MASK_CTRL0, 1, 1, 1),
+};
+
+static void ntp8918_reset_gpio(struct ntp8918_priv *ntp8918)
+{
+ /*
+ * Proper initialization sequence for NTP8918 amplifier requires driving
+ * /RESET signal low during power up for at least 0.1us. The sequence is,
+ * according to NTP8918 datasheet, 6.2 Timing Sequence 1:
+ * Deassert for T2 >= 1ms...
+ */
+ reset_control_deassert(ntp8918->reset);
+ fsleep(1000);
+
+ /* ...Assert for T3 >= 0.1us... */
+ reset_control_assert(ntp8918->reset);
+ fsleep(1);
+
+ /* ...Deassert, and wait for T4 >= 0.5ms before sound on sequence. */
+ reset_control_deassert(ntp8918->reset);
+ fsleep(500);
+}
+
+static const struct reg_sequence ntp8918_sound_off[] = {
+ { NTP8918_MASTER_VOL, 0 },
+};
+
+static const struct reg_sequence ntp8918_sound_on[] = {
+ { NTP8918_MASTER_VOL, 0b11 },
+};
+
+static int ntp8918_load_firmware(struct ntp8918_priv *ntp8918)
+{
+ int ret;
+
+ ret = ntpfw_load(ntp8918->i2c, NTP8918_FW_NAME, NTP8918_FW_MAGIC);
+ if (ret == -ENOENT) {
+ dev_warn_once(&ntp8918->i2c->dev, "Could not find firmware %s\n",
+ NTP8918_FW_NAME);
+ return 0;
+ }
+
+ return ret;
+}
+
+static int ntp8918_snd_suspend(struct snd_soc_component *component)
+{
+ struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
+
+ regcache_cache_only(component->regmap, true);
+
+ regmap_multi_reg_write_bypassed(component->regmap,
+ ntp8918_sound_off,
+ ARRAY_SIZE(ntp8918_sound_off));
+
+ /*
+ * According to NTP8918 datasheet, 6.2 Timing Sequence 1:
+ * wait after sound off for T6 >= 0.5ms
+ */
+ fsleep(500);
+ reset_control_assert(ntp8918->reset);
+
+ regcache_mark_dirty(component->regmap);
+ clk_disable_unprepare(ntp8918->bck);
+
+ return 0;
+}
+
+static int ntp8918_snd_resume(struct snd_soc_component *component)
+{
+ struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
+ int ret;
+
+ ret = clk_prepare_enable(ntp8918->bck);
+ if (ret)
+ return ret;
+
+ ntp8918_reset_gpio(ntp8918);
+
+ regmap_multi_reg_write_bypassed(component->regmap,
+ ntp8918_sound_on,
+ ARRAY_SIZE(ntp8918_sound_on));
+
+ ret = ntp8918_load_firmware(ntp8918);
+ if (ret) {
+ dev_err(&ntp8918->i2c->dev, "Failed to load firmware\n");
+ return ret;
+ }
+
+ regcache_cache_only(component->regmap, false);
+ snd_soc_component_cache_sync(component);
+
+ return 0;
+}
+
+static int ntp8918_probe(struct snd_soc_component *component)
+{
+ int ret;
+ struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
+ struct device *dev = component->dev;
+
+ ret = snd_soc_add_component_controls(component, ntp8918_vol_control,
+ ARRAY_SIZE(ntp8918_vol_control));
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to add controls\n");
+
+ ret = ntp8918_load_firmware(ntp8918);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to load firmware\n");
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget ntp8918_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("AIFIN", "Playback", SND_SOC_NOPM, 0, 0),
+
+ SND_SOC_DAPM_OUTPUT("OUT1"),
+ SND_SOC_DAPM_OUTPUT("OUT2"),
+};
+
+static const struct snd_soc_dapm_route ntp8918_dapm_routes[] = {
+ { "OUT1", NULL, "AIFIN" },
+ { "OUT2", NULL, "AIFIN" },
+};
+
+static const struct snd_soc_component_driver soc_component_ntp8918 = {
+ .probe = ntp8918_probe,
+ .suspend = ntp8918_snd_suspend,
+ .resume = ntp8918_snd_resume,
+ .dapm_widgets = ntp8918_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ntp8918_dapm_widgets),
+ .dapm_routes = ntp8918_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(ntp8918_dapm_routes),
+};
+
+static int ntp8918_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 ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
+ unsigned int input_fmt = 0;
+ unsigned int gsa_fmt = 0;
+ unsigned int gsa_fmt_mask;
+ unsigned int mcf;
+ int bclk;
+ int ret;
+
+ bclk = snd_soc_params_to_bclk(params);
+ switch (bclk) {
+ case 3072000:
+ case 2822400:
+ mcf = 0;
+ break;
+ case 6144000:
+ mcf = 1;
+ break;
+ case 2048000:
+ mcf = 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = snd_soc_component_update_bits(component, NTP8918_MCLK_FREQ_CTRL,
+ NTP8918_MCLK_FREQ_MCF, mcf);
+ if (ret)
+ return ret;
+
+ switch (ntp8918->format) {
+ case SND_SOC_DAIFMT_I2S:
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ input_fmt |= NTP8918_INPUT_FMT_GSA_MODE;
+ gsa_fmt |= NTP8918_GSA_RIGHT_J;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ input_fmt |= NTP8918_INPUT_FMT_GSA_MODE;
+ break;
+ }
+
+ ret = snd_soc_component_update_bits(component, NTP8918_INPUT_FMT,
+ NTP8918_INPUT_FMT_MASTER_MODE |
+ NTP8918_INPUT_FMT_GSA_MODE,
+ input_fmt);
+
+ if (!(input_fmt & NTP8918_INPUT_FMT_GSA_MODE) || ret < 0)
+ return ret;
+
+ switch (params_width(params)) {
+ case 24:
+ gsa_fmt |= NTP8918_GSA_BS(0);
+ break;
+ case 20:
+ gsa_fmt |= NTP8918_GSA_BS(1);
+ break;
+ case 18:
+ gsa_fmt |= NTP8918_GSA_BS(2);
+ break;
+ case 16:
+ gsa_fmt |= NTP8918_GSA_BS(3);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ gsa_fmt_mask = NTP8918_GSA_BS_MASK |
+ NTP8918_GSA_RIGHT_J |
+ NTP8918_GSA_LSB;
+ return snd_soc_component_update_bits(component, NTP8918_GSA_FMT,
+ gsa_fmt_mask, gsa_fmt);
+}
+
+static int ntp8918_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ntp8918_priv *ntp8918 = snd_soc_component_get_drvdata(component);
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ case SND_SOC_DAIFMT_LEFT_J:
+ ntp8918->format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int ntp8918_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
+{
+ unsigned int mute_mask = NTP8918_SOFT_MUTE_SM1 |
+ NTP8918_SOFT_MUTE_SM2;
+
+ return snd_soc_component_update_bits(dai->component, NTP8918_SOFT_MUTE,
+ mute_mask, mute ? mute_mask : 0);
+}
+
+static const struct snd_soc_dai_ops ntp8918_dai_ops = {
+ .hw_params = ntp8918_hw_params,
+ .set_fmt = ntp8918_set_fmt,
+ .mute_stream = ntp8918_digital_mute,
+};
+
+static struct snd_soc_dai_driver ntp8918_dai = {
+ .name = "ntp8918-amplifier",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = NTP8918_RATES,
+ .formats = NTP8918_FORMATS,
+ },
+ .ops = &ntp8918_dai_ops,
+};
+
+static const struct regmap_config ntp8918_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = REG_MAX,
+ .cache_type = REGCACHE_MAPLE,
+};
+
+static int ntp8918_i2c_probe(struct i2c_client *i2c)
+{
+ struct ntp8918_priv *ntp8918;
+ int ret;
+ struct regmap *regmap;
+
+ ntp8918 = devm_kzalloc(&i2c->dev, sizeof(*ntp8918), GFP_KERNEL);
+ if (!ntp8918)
+ return -ENOMEM;
+
+ ntp8918->i2c = i2c;
+
+ ntp8918->reset = devm_reset_control_get_shared(&i2c->dev, NULL);
+ if (IS_ERR(ntp8918->reset))
+ return dev_err_probe(&i2c->dev, PTR_ERR(ntp8918->reset), "Failed to get reset\n");
+
+ dev_set_drvdata(&i2c->dev, ntp8918);
+
+ ntp8918_reset_gpio(ntp8918);
+
+ regmap = devm_regmap_init_i2c(i2c, &ntp8918_regmap);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
+ "Failed to allocate regmap\n");
+
+ ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_ntp8918,
+ &ntp8918_dai, 1);
+ if (ret)
+ return dev_err_probe(&i2c->dev, ret,
+ "Failed to register component\n");
+
+ ntp8918->bck = devm_clk_get_enabled(&i2c->dev, "bck");
+ if (IS_ERR(ntp8918->bck))
+ return dev_err_probe(&i2c->dev, PTR_ERR(ntp8918->bck), "failed to get bck clock\n");
+
+ return 0;
+}
+
+static const struct i2c_device_id ntp8918_i2c_id[] = {
+ { "ntp8918", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ntp8918_i2c_id);
+
+static const struct of_device_id ntp8918_of_match[] = {
+ {.compatible = "neofidelity,ntp8918"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, ntp8918_of_match);
+
+static struct i2c_driver ntp8918_i2c_driver = {
+ .probe = ntp8918_i2c_probe,
+ .id_table = ntp8918_i2c_id,
+ .driver = {
+ .name = "ntp8918",
+ .of_match_table = ntp8918_of_match,
+ },
+};
+module_i2c_driver(ntp8918_i2c_driver);
+
+MODULE_AUTHOR("Igor Prusov <ivprusov@salutedevices.com>");
+MODULE_DESCRIPTION("NTP8918 Audio Amplifier Driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/ntpfw.c b/sound/soc/codecs/ntpfw.c
new file mode 100644
index 000000000000..5ced2e966ab7
--- /dev/null
+++ b/sound/soc/codecs/ntpfw.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ntpfw.c - Firmware helper functions for Neofidelity codecs
+ *
+ * Copyright (c) 2024, SaluteDevices. All Rights Reserved.
+ */
+
+#include <linux/i2c.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+
+#include "ntpfw.h"
+
+struct ntpfw_chunk {
+ __be16 length;
+ u8 step;
+ u8 data[];
+} __packed;
+
+struct ntpfw_header {
+ __be32 magic;
+} __packed;
+
+static bool ntpfw_verify(struct device *dev, const u8 *buf, size_t buf_size, u32 magic)
+{
+ const struct ntpfw_header *header = (struct ntpfw_header *)buf;
+ u32 buf_magic;
+
+ if (buf_size <= sizeof(*header)) {
+ dev_err(dev, "Failed to load firmware: image too small\n");
+ return false;
+ }
+
+ buf_magic = be32_to_cpu(header->magic);
+ if (buf_magic != magic) {
+ dev_err(dev, "Failed to load firmware: invalid magic 0x%x:\n", buf_magic);
+ return false;
+ }
+
+ return true;
+}
+
+static bool ntpfw_verify_chunk(struct device *dev, const struct ntpfw_chunk *chunk, size_t buf_size)
+{
+ size_t chunk_size;
+
+ if (buf_size <= sizeof(*chunk)) {
+ dev_err(dev, "Failed to load firmware: chunk size too big\n");
+ return false;
+ }
+
+ if (chunk->step != 2 && chunk->step != 5) {
+ dev_err(dev, "Failed to load firmware: invalid chunk step: %d\n", chunk->step);
+ return false;
+ }
+
+ chunk_size = be16_to_cpu(chunk->length);
+ if (chunk_size > buf_size) {
+ dev_err(dev, "Failed to load firmware: invalid chunk length\n");
+ return false;
+ }
+
+ if (chunk_size % chunk->step) {
+ dev_err(dev, "Failed to load firmware: chunk length and step mismatch\n");
+ return false;
+ }
+
+ return true;
+}
+
+static int ntpfw_send_chunk(struct i2c_client *i2c, const struct ntpfw_chunk *chunk)
+{
+ int ret;
+ size_t i;
+ size_t length = be16_to_cpu(chunk->length);
+
+ for (i = 0; i < length; i += chunk->step) {
+ ret = i2c_master_send(i2c, &chunk->data[i], chunk->step);
+ if (ret != chunk->step) {
+ dev_err(&i2c->dev, "I2C send failed: %d\n", ret);
+ return ret < 0 ? ret : -EIO;
+ }
+ }
+
+ return 0;
+}
+
+int ntpfw_load(struct i2c_client *i2c, const char *name, u32 magic)
+{
+ struct device *dev = &i2c->dev;
+ const struct ntpfw_chunk *chunk;
+ const struct firmware *fw;
+ const u8 *data;
+ size_t leftover;
+ int ret;
+
+ ret = request_firmware(&fw, name, dev);
+ if (ret) {
+ dev_warn(dev, "request_firmware '%s' failed with %d\n",
+ name, ret);
+ return ret;
+ }
+
+ if (!ntpfw_verify(dev, fw->data, fw->size, magic)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ data = fw->data + sizeof(struct ntpfw_header);
+ leftover = fw->size - sizeof(struct ntpfw_header);
+
+ while (leftover) {
+ chunk = (struct ntpfw_chunk *)data;
+
+ if (!ntpfw_verify_chunk(dev, chunk, leftover)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ ret = ntpfw_send_chunk(i2c, chunk);
+ if (ret)
+ goto done;
+
+ data += be16_to_cpu(chunk->length) + sizeof(*chunk);
+ leftover -= be16_to_cpu(chunk->length) + sizeof(*chunk);
+ }
+
+done:
+ release_firmware(fw);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ntpfw_load);
+
+MODULE_AUTHOR("Igor Prusov <ivprusov@salutedevices.com>");
+MODULE_DESCRIPTION("Helper for loading Neofidelity amplifiers firmware");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/ntpfw.h b/sound/soc/codecs/ntpfw.h
new file mode 100644
index 000000000000..1cf10d5480ee
--- /dev/null
+++ b/sound/soc/codecs/ntpfw.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/**
+ * ntpfw.h - Firmware helper functions for Neofidelity codecs
+ *
+ * Copyright (c) 2024, SaluteDevices. All Rights Reserved.
+ */
+
+#ifndef __NTPFW_H__
+#define __NTPFW_H__
+#include <linux/i2c.h>
+#include <linux/firmware.h>
+
+/**
+ * ntpfw_load - load firmware to amplifier over i2c interface.
+ *
+ * @i2c Pointer to amplifier's I2C client.
+ * @name Firmware file name.
+ * @magic Magic number to validate firmware.
+ * @return 0 or error code upon error.
+ */
+int ntpfw_load(struct i2c_client *i2c, const char *name, const u32 magic);
+
+#endif /* __NTPFW_H__ */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.