From patchwork Thu May 11 15:05:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Martin_Povi=C5=A1er?= X-Patchwork-Id: 13238126 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8AFDFC77B7C for ; Thu, 11 May 2023 15:07:45 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id D043BED9; Thu, 11 May 2023 17:06:52 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz D043BED9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1683817662; bh=CSUQEL5n9/eZar15lW4jaif3f1BMAmxtD6wV7xkTSAQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=JT14GND1QJZel72Gn5rGyrbgKISEz6+mfWAiZ7b28OhS7hpyt06ewkY9Q8dB3WtMp 9oeyekIVhLI+SHbY0LiIRxa8sM6waMRvl+nSMxbDPjdmbMuRktsn5mcV3eejw7dDG0 XSddN6Tvu7JTy40gQdMy1ty52bSkSKCbb0Ox8y0U= Received: by alsa1.perex.cz (Postfix, from userid 50401) id 560DBF80544; Thu, 11 May 2023 17:06:30 +0200 (CEST) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id F179DF8014C; Thu, 11 May 2023 17:06:29 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 3D665F80310; Thu, 11 May 2023 17:06:25 +0200 (CEST) Received: from hutie.ust.cz (unknown [IPv6:2a03:3b40:fe:f0::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id E7822F80310 for ; Thu, 11 May 2023 17:06:19 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz E7822F80310 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key, unprotected) header.d=cutebit.org header.i=@cutebit.org header.a=rsa-sha256 header.s=mail header.b=m+c9kFV4 From: =?utf-8?q?Martin_Povi=C5=A1er?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cutebit.org; s=mail; t=1683817579; bh=LUXpft4LGfCn5GgpYQv6QU3QQmD6+DR/XZsk9hOWCGg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=m+c9kFV4LIiEFh1DscaoTKxX7uZPMsuDU5gVOGJJkRH7CCfqbWyeM/CT3vaMw61Lj p7bi+S31cUb8snlx/h8qv3YFs5nJD3QoC71AnBotJgty5sj5isC85I2fu2UnYCP+Gt S09R9hS8PvRFyOJznORnq3ePMbvW2wZWuwu1AUxY= To: =?utf-8?q?Martin_Povi=C5=A1er?= , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jaroslav Kysela , Takashi Iwai , Lars-Peter Clausen , =?utf-8?q?Nuno_S=C3=A1?= Cc: asahi@lists.linux.dev, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] ASoC: dt-bindings: Add adi,ssm3515 amp schema Date: Thu, 11 May 2023 17:05:45 +0200 Message-Id: <20230511150546.8499-2-povik+lin@cutebit.org> In-Reply-To: <20230511150546.8499-1-povik+lin@cutebit.org> References: <20230511150546.8499-1-povik+lin@cutebit.org> MIME-Version: 1.0 Message-ID-Hash: XY3OFOI6HM74BTUNK4WBT25ZTQW5WQFT X-Message-ID-Hash: XY3OFOI6HM74BTUNK4WBT25ZTQW5WQFT X-MailFrom: povik+lin@cutebit.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Add a DT schema for the SSM3515 amp by Analog Devices. It's a simple mono amplifier with digital input. Signed-off-by: Martin Povišer Reviewed-by: Krzysztof Kozlowski --- .../bindings/sound/adi,ssm3515.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/adi,ssm3515.yaml diff --git a/Documentation/devicetree/bindings/sound/adi,ssm3515.yaml b/Documentation/devicetree/bindings/sound/adi,ssm3515.yaml new file mode 100644 index 000000000000..144450df5869 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/adi,ssm3515.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/adi,ssm3515.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices SSM3515 Audio Amplifier + +maintainers: + - Martin Povišer + +description: | + SSM3515 is a mono Class-D audio amplifier with digital input. + + https://www.analog.com/media/en/technical-documentation/data-sheets/SSM3515.pdf + +allOf: + - $ref: dai-common.yaml# + +properties: + compatible: + enum: + - adi,ssm3515 + + reg: + maxItems: 1 + + '#sound-dai-cells': + const: 0 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + codec@14 { + compatible = "adi,ssm3515"; + reg = <0x14>; + #sound-dai-cells = <0>; + sound-name-prefix = "Left Tweeter"; + }; + }; From patchwork Thu May 11 15:05:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Martin_Povi=C5=A1er?= X-Patchwork-Id: 13238128 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D964CC77B7C for ; Thu, 11 May 2023 15:08:20 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id DEA19EE9; Thu, 11 May 2023 17:07:28 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz DEA19EE9 DKIM-Signature: v=1; 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Thu, 11 May 2023 17:06:20 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 506E8F8032D Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key, unprotected) header.d=cutebit.org header.i=@cutebit.org header.a=rsa-sha256 header.s=mail header.b=WzEXWxda From: =?utf-8?q?Martin_Povi=C5=A1er?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cutebit.org; s=mail; t=1683817579; bh=cV/aQYkR5cM/rKm67ytuepltXaaABvz64sPUV6o+vGU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WzEXWxda0oh9aquHqBKdyJNaZKZVnFcTaafbfXT7td/m7mi0JlPLJS6HbhogiRLj1 TuuqoavAhCoRER3QMYJO5fPrji7fUS33MU5z0cgLb58N1752i7E3mciy1wzJsqVBiV yaOvFSCcmscxdtkAvhcxSo/Kvs9d5LVYhL+1Pjo4= To: =?utf-8?q?Martin_Povi=C5=A1er?= , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jaroslav Kysela , Takashi Iwai , Lars-Peter Clausen , =?utf-8?q?Nuno_S=C3=A1?= Cc: asahi@lists.linux.dev, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] ASoC: ssm3515: Add new amp driver Date: Thu, 11 May 2023 17:05:46 +0200 Message-Id: <20230511150546.8499-3-povik+lin@cutebit.org> In-Reply-To: <20230511150546.8499-1-povik+lin@cutebit.org> References: <20230511150546.8499-1-povik+lin@cutebit.org> MIME-Version: 1.0 Message-ID-Hash: ZX3JDUFADIMGRNWXHDUTGAE5DHTJ52BC X-Message-ID-Hash: ZX3JDUFADIMGRNWXHDUTGAE5DHTJ52BC X-MailFrom: povik+lin@cutebit.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: The Analog Devices' SSM3515 is a mono audio amplifier with digital input, equipped on Apple's 2021 iMacs. Add an ASoC driver for it, and register both the driver code and schema in MAINTAINERS. Signed-off-by: Martin Povišer --- MAINTAINERS | 2 + sound/soc/codecs/Kconfig | 6 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/ssm3515.c | 448 +++++++++++++++++++++++++++++++++++++ 4 files changed, 458 insertions(+) create mode 100644 sound/soc/codecs/ssm3515.c diff --git a/MAINTAINERS b/MAINTAINERS index 460f953f331b..78136300b026 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1990,9 +1990,11 @@ M: Martin Povišer L: asahi@lists.linux.dev L: alsa-devel@alsa-project.org (moderated for non-subscribers) S: Maintained +F: Documentation/devicetree/bindings/sound/adi,ssm3515.yaml F: Documentation/devicetree/bindings/sound/apple,* F: sound/soc/apple/* F: sound/soc/codecs/cs42l83-i2c.c +F: sound/soc/codecs/ssm3515.c ARM/ARTPEC MACHINE SUPPORT M: Jesper Nilsson diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 8020097d4e4c..d5665c21b6f3 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -1652,6 +1652,12 @@ config SND_SOC_SSM2602_I2C select SND_SOC_SSM2602 select REGMAP_I2C +config SND_SOC_SSM3515 + tristate "Analog Devices SSM3515 amplifier driver" + select REGMAP_I2C + depends on I2C + depends on OF + config SND_SOC_SSM4567 tristate "Analog Devices ssm4567 amplifier driver support" depends on I2C diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 5cdbae88e6e3..8a35bc01c486 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -256,6 +256,7 @@ snd-soc-ssm2518-objs := ssm2518.o snd-soc-ssm2602-objs := ssm2602.o snd-soc-ssm2602-spi-objs := ssm2602-spi.o snd-soc-ssm2602-i2c-objs := ssm2602-i2c.o +snd-soc-ssm3515-objs := ssm3515.o snd-soc-ssm4567-objs := ssm4567.o snd-soc-sta32x-objs := sta32x.o snd-soc-sta350-objs := sta350.o @@ -623,6 +624,7 @@ obj-$(CONFIG_SND_SOC_SSM2518) += snd-soc-ssm2518.o obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o obj-$(CONFIG_SND_SOC_SSM2602_SPI) += snd-soc-ssm2602-spi.o obj-$(CONFIG_SND_SOC_SSM2602_I2C) += snd-soc-ssm2602-i2c.o +obj-$(CONFIG_SND_SOC_SSM3515) += snd-soc-ssm3515.o obj-$(CONFIG_SND_SOC_SSM4567) += snd-soc-ssm4567.o obj-$(CONFIG_SND_SOC_STA32X) += snd-soc-sta32x.o obj-$(CONFIG_SND_SOC_STA350) += snd-soc-sta350.o diff --git a/sound/soc/codecs/ssm3515.c b/sound/soc/codecs/ssm3515.c new file mode 100644 index 000000000000..784e890031a4 --- /dev/null +++ b/sound/soc/codecs/ssm3515.c @@ -0,0 +1,448 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +// +// Analog Devices' SSM3515 audio amp driver +// +// Copyright (C) The Asahi Linux Contributors + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + + +#define SSM3515_PWR 0x00 +#define SSM3515_PWR_APWDN_EN BIT(7) +#define SSM3515_PWR_BSNS_PWDN BIT(6) +#define SSM3515_PWR_S_RST BIT(1) +#define SSM3515_PWR_SPWDN BIT(0) + +#define SSM3515_GEC 0x01 +#define SSM3515_GEC_EDGE BIT(4) +#define SSM3515_GEC_EDGE_SHIFT 4 +#define SSM3515_GEC_ANA_GAIN GENMASK(1, 0) + +#define SSM3515_DAC 0x02 +#define SSM3515_DAC_HV BIT(7) +#define SSM3515_DAC_MUTE BIT(6) +#define SSM3515_DAC_HPF BIT(5) +#define SSM3515_DAC_LPM BIT(4) +#define SSM3515_DAC_FS GENMASK(2, 0) + +#define SSM3515_DAC_VOL 0x03 + +#define SSM3515_SAI1 0x04 +#define SSM3515_SAI1_DAC_POL BIT(7) +#define SSM3515_SAI1_BCLK_POL BIT(6) +#define SSM3515_SAI1_TDM_BCLKS GENMASK(5, 3) +#define SSM3515_SAI1_FSYNC_MODE BIT(2) +#define SSM3515_SAI1_SDATA_FMT BIT(1) +#define SSM3515_SAI1_SAI_MODE BIT(0) + +#define SSM3515_SAI2 0x05 +#define SSM3515_SAI2_DATA_WIDTH BIT(7) +#define SSM3515_SAI2_AUTO_SLOT BIT(4) +#define SSM3515_SAI2_TDM_SLOT GENMASK(3, 0) + +#define SSM3515_VBAT_OUT 0x06 + +#define SSM3515_STATUS 0x0a +#define SSM3515_STATUS_UVLO_REG BIT(6) +#define SSM3515_STATUS_LIM_EG BIT(5) +#define SSM3515_STATUS_CLIP BIT(4) +#define SSM3515_STATUS_AMP_OC BIT(3) +#define SSM3515_STATUS_OTF BIT(2) +#define SSM3515_STATUS_OTW BIT(1) +#define SSM3515_STATUS_BAT_WARN BIT(0) + +static bool ssm3515_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case SSM3515_STATUS: + case SSM3515_VBAT_OUT: + return true; + + default: + return false; + } +} + +static const struct reg_default ssm3515_reg_defaults[] = { + { SSM3515_PWR, 0x81 }, + { SSM3515_GEC, 0x01 }, + { SSM3515_DAC, 0x32 }, + { SSM3515_DAC_VOL, 0x40 }, + { SSM3515_SAI1, 0x11 }, + { SSM3515_SAI2, 0x00 }, +}; + +static const struct regmap_config ssm3515_i2c_regmap = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = ssm3515_volatile_reg, + .max_register = 0xb, + .reg_defaults = ssm3515_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(ssm3515_reg_defaults), + .cache_type = REGCACHE_FLAT, +}; + +struct ssm3515_data { + struct device *dev; + struct regmap *regmap; +}; + +// The specced range is -71.25...24.00 dB with step size of 0.375 dB, +// and a mute item below that. This is represented by -71.62...24.00 dB +// with the mute item mapped onto the low end. +static DECLARE_TLV_DB_MINMAX_MUTE(ssm3515_dac_volume, -7162, 2400); + +static const char * const ssm3515_ana_gain_text[] = { + "8.4 V Span", "12.6 V Span", "14 V Span", "15 V Span", +}; + +static SOC_ENUM_SINGLE_DECL(ssm3515_ana_gain_enum, SSM3515_GEC, + __bf_shf(SSM3515_GEC_ANA_GAIN), + ssm3515_ana_gain_text); + +static const struct snd_kcontrol_new ssm3515_snd_controls[] = { + SOC_SINGLE_TLV("DAC Playback Volume", SSM3515_DAC_VOL, + 0, 255, 1, ssm3515_dac_volume), + SOC_SINGLE("Low EMI Mode Switch", SSM3515_GEC, + __bf_shf(SSM3515_GEC_EDGE), 1, 0), + SOC_SINGLE("Soft Volume Ramping Switch", SSM3515_DAC, + __bf_shf(SSM3515_DAC_HV), 1, 1), + SOC_SINGLE("HPF Switch", SSM3515_DAC, + __bf_shf(SSM3515_DAC_HPF), 1, 0), + SOC_SINGLE("DAC Invert Switch", SSM3515_SAI1, + __bf_shf(SSM3515_SAI1_DAC_POL), 1, 0), + SOC_ENUM("DAC Analog Gain Select", ssm3515_ana_gain_enum), +}; + +static void ssm3515_read_faults(struct snd_soc_component *component) +{ + int ret; + + ret = snd_soc_component_read(component, SSM3515_STATUS); + if (ret <= 0) { + /* + * If the read was erroneous, ASoC core has printed a message, + * and that's all that's appropriate in handling the error here. + */ + return; + } + + dev_err(component->dev, "device reports:%s%s%s%s%s%s%s\n", + FIELD_GET(SSM3515_STATUS_UVLO_REG, ret) ? " voltage regulator fault" : "", + FIELD_GET(SSM3515_STATUS_LIM_EG, ret) ? " limiter engaged" : "", + FIELD_GET(SSM3515_STATUS_CLIP, ret) ? " clipping detected" : "", + FIELD_GET(SSM3515_STATUS_AMP_OC, ret) ? " amp over-current fault" : "", + FIELD_GET(SSM3515_STATUS_OTF, ret) ? " overtemperature fault" : "", + FIELD_GET(SSM3515_STATUS_OTW, ret) ? " overtemperature warning" : "", + FIELD_GET(SSM3515_STATUS_BAT_WARN, ret) ? " bat voltage low warning" : ""); +} + +static int ssm3515_probe(struct snd_soc_component *component) +{ + int ret; + + /* Start out muted */ + ret = snd_soc_component_update_bits(component, SSM3515_DAC, + SSM3515_DAC_MUTE, SSM3515_DAC_MUTE); + if (ret < 0) + return ret; + + /* Disable the 'master power-down' */ + ret = snd_soc_component_update_bits(component, SSM3515_PWR, + SSM3515_PWR_SPWDN, 0); + if (ret < 0) + return ret; + + return 0; +} + +static int ssm3515_mute(struct snd_soc_dai *dai, int mute, int direction) +{ + int ret; + + ret = snd_soc_component_update_bits(dai->component, + SSM3515_DAC, + SSM3515_DAC_MUTE, + FIELD_PREP(SSM3515_DAC_MUTE, mute)); + if (ret < 0) + return ret; + return 0; +} + +static int ssm3515_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; + int ret, rateval; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16: + case SNDRV_PCM_FORMAT_S24: + ret = snd_soc_component_update_bits(component, + SSM3515_SAI2, SSM3515_SAI2_DATA_WIDTH, + FIELD_PREP(SSM3515_SAI2_DATA_WIDTH, + params_width(params) == 16)); + if (ret < 0) + return ret; + break; + + default: + return -EINVAL; + } + + switch (params_rate(params)) { + case 8000 ... 12000: + rateval = 0; + break; + case 16000 ... 24000: + rateval = 1; + break; + case 32000 ... 48000: + rateval = 2; + break; + case 64000 ... 96000: + rateval = 3; + break; + case 128000 ... 192000: + rateval = 4; + break; + case 48001 ... 63999: /* this is ...72000 but overlaps */ + rateval = 5; + break; + default: + return -EINVAL; + } + + ret = snd_soc_component_update_bits(component, + SSM3515_DAC, SSM3515_DAC_FS, + FIELD_PREP(SSM3515_DAC_FS, rateval)); + if (ret < 0) + return ret; + + return 0; +} + +static int ssm3515_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct snd_soc_component *component = dai->component; + bool fpol_inv = false; /* non-inverted: frame starts with low-to-high FSYNC */ + int ret; + u8 sai1 = 0; + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_IB_NF: + case SND_SOC_DAIFMT_IB_IF: + sai1 |= SSM3515_SAI1_BCLK_POL; + break; + } + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + fpol_inv = 1; + sai1 &= ~SSM3515_SAI1_SDATA_FMT; /* 1 bit start delay */ + break; + case SND_SOC_DAIFMT_LEFT_J: + fpol_inv = 0; + sai1 |= SSM3515_SAI1_SDATA_FMT; /* no start delay */ + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_IF: + case SND_SOC_DAIFMT_IB_IF: + fpol_inv ^= 1; + break; + } + + /* Set the serial input to 'TDM mode' */ + sai1 |= SSM3515_SAI1_SAI_MODE; + + if (fpol_inv) { + /* + * We configure the codec in a 'TDM mode', in which the + * FSYNC_MODE bit of SAI1 is supposed to select between + * what the datasheet calls 'Pulsed FSYNC mode' and '50% + * FSYNC mode'. + * + * Experiments suggest that this bit in fact simply selects + * the FSYNC polarity, so go with that. + */ + sai1 |= SSM3515_SAI1_FSYNC_MODE; + } + + ret = snd_soc_component_update_bits(component, SSM3515_SAI1, + SSM3515_SAI1_BCLK_POL | SSM3515_SAI1_SDATA_FMT | + SSM3515_SAI1_SAI_MODE | SSM3515_SAI1_FSYNC_MODE, sai1); + + if (ret < 0) + return ret; + return 0; +} + +static int ssm3515_set_tdm_slot(struct snd_soc_dai *dai, + unsigned int tx_mask, + unsigned int rx_mask, + int slots, int slot_width) +{ + struct snd_soc_component *component = dai->component; + int slot, tdm_bclks_val, ret; + + if (tx_mask == 0 || rx_mask != 0) + return -EINVAL; + + slot = __ffs(tx_mask); + + if (tx_mask & ~BIT(slot)) + return -EINVAL; + + switch (slot_width) { + case 16: + tdm_bclks_val = 0; + break; + case 24: + tdm_bclks_val = 1; + break; + case 32: + tdm_bclks_val = 2; + break; + case 48: + tdm_bclks_val = 3; + break; + case 64: + tdm_bclks_val = 4; + break; + default: + return -EINVAL; + } + + ret = snd_soc_component_update_bits(component, SSM3515_SAI1, + SSM3515_SAI1_TDM_BCLKS, + FIELD_PREP(SSM3515_SAI1_TDM_BCLKS, tdm_bclks_val)); + if (ret < 0) + return ret; + + ret = snd_soc_component_update_bits(component, SSM3515_SAI2, + SSM3515_SAI2_TDM_SLOT, + FIELD_PREP(SSM3515_SAI2_TDM_SLOT, slot)); + if (ret < 0) + return ret; + + return 0; +} + +static int ssm3515_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + /* + * We don't get live notification of faults, so at least at + * this time, when playback is over, check if we have tripped + * over anything and if so, log it. + */ + ssm3515_read_faults(dai->component); + return 0; +} + +static const struct snd_soc_dai_ops ssm3515_dai_ops = { + .mute_stream = ssm3515_mute, + .hw_params = ssm3515_hw_params, + .set_fmt = ssm3515_set_fmt, + .set_tdm_slot = ssm3515_set_tdm_slot, + .hw_free = ssm3515_hw_free, +}; + +static struct snd_soc_dai_driver ssm3515_dai_driver = { + .name = "SSM3515 SAI", + .id = 0, + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 1, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, + }, + .ops = &ssm3515_dai_ops, +}; + +static const struct snd_soc_dapm_widget ssm3515_dapm_widgets[] = { + SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_OUTPUT("OUT"), +}; + +static const struct snd_soc_dapm_route ssm3515_dapm_routes[] = { + {"OUT", NULL, "DAC"}, + {"DAC", NULL, "Playback"}, +}; + +static const struct snd_soc_component_driver ssm3515_asoc_component = { + .probe = ssm3515_probe, + .controls = ssm3515_snd_controls, + .num_controls = ARRAY_SIZE(ssm3515_snd_controls), + .dapm_widgets = ssm3515_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(ssm3515_dapm_widgets), + .dapm_routes = ssm3515_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(ssm3515_dapm_routes), + .endianness = 1, +}; + +static int ssm3515_i2c_probe(struct i2c_client *client) +{ + struct ssm3515_data *data; + int ret; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->dev = &client->dev; + i2c_set_clientdata(client, data); + + data->regmap = devm_regmap_init_i2c(client, &ssm3515_i2c_regmap); + if (IS_ERR(data->regmap)) + return dev_err_probe(data->dev, PTR_ERR(data->regmap), + "initializing register map\n"); + + /* Perform a reset */ + ret = regmap_update_bits(data->regmap, SSM3515_PWR, + SSM3515_PWR_S_RST, SSM3515_PWR_S_RST); + if (ret < 0) + return dev_err_probe(data->dev, ret, + "performing software reset\n"); + regmap_reinit_cache(data->regmap, &ssm3515_i2c_regmap); + + return devm_snd_soc_register_component(data->dev, + &ssm3515_asoc_component, + &ssm3515_dai_driver, 1); +} + +static const struct of_device_id ssm3515_of_match[] = { + { .compatible = "adi,ssm3515" }, + {} +}; +MODULE_DEVICE_TABLE(of, ssm3515_of_match); + +static struct i2c_driver ssm3515_i2c_driver = { + .driver = { + .name = "ssm3515", + .of_match_table = of_match_ptr(ssm3515_of_match), + }, + .probe_new = ssm3515_i2c_probe, +}; +module_i2c_driver(ssm3515_i2c_driver); + +MODULE_AUTHOR("Martin Povišer "); +MODULE_DESCRIPTION("ASoC SSM3515 audio amp driver"); +MODULE_LICENSE("Dual MIT/GPL");