// SPDX-License-Identifier: GPL-2.0 // // Driver for Microchip S/PDIF RX Controller // // Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries // // Author: Codrin Ciubotariu <[email protected]> #include <linux/clk.h> #include <linux/io.h> #include <linux/module.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/spinlock.h> #include <sound/dmaengine_pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> /* * ---- S/PDIF Receiver Controller Register map ---- */ #define SPDIFRX_CR … #define SPDIFRX_MR … #define SPDIFRX_IER … #define SPDIFRX_IDR … #define SPDIFRX_IMR … #define SPDIFRX_ISR … #define SPDIFRX_RSR … #define SPDIFRX_RHR … #define SPDIFRX_CHSR(channel, reg) … #define SPDIFRX_CHUD(channel, reg) … #define SPDIFRX_WPMR … #define SPDIFRX_WPSR … #define SPDIFRX_VERSION … /* * ---- Control Register (Write-only) ---- */ #define SPDIFRX_CR_SWRST … /* * ---- Mode Register (Read/Write) ---- */ /* Receive Enable */ #define SPDIFRX_MR_RXEN_MASK … #define SPDIFRX_MR_RXEN_DISABLE … #define SPDIFRX_MR_RXEN_ENABLE … /* Validity Bit Mode */ #define SPDIFRX_MR_VBMODE_MASK … #define SPDIFRX_MR_VBMODE_ALWAYS_LOAD … #define SPDIFRX_MR_VBMODE_DISCARD_IF_VB1 … /* Data Word Endian Mode */ #define SPDIFRX_MR_ENDIAN_MASK … #define SPDIFRX_MR_ENDIAN_LITTLE … #define SPDIFRX_MR_ENDIAN_BIG … /* Parity Bit Mode */ #define SPDIFRX_MR_PBMODE_MASK … #define SPDIFRX_MR_PBMODE_PARCHECK … #define SPDIFRX_MR_PBMODE_NOPARCHECK … /* Sample Data Width */ #define SPDIFRX_MR_DATAWIDTH_MASK … #define SPDIFRX_MR_DATAWIDTH(width) … /* Packed Data Mode in Receive Holding Register */ #define SPDIFRX_MR_PACK_MASK … #define SPDIFRX_MR_PACK_DISABLED … #define SPDIFRX_MR_PACK_ENABLED … /* Start of Block Bit Mode */ #define SPDIFRX_MR_SBMODE_MASK … #define SPDIFRX_MR_SBMODE_ALWAYS_LOAD … #define SPDIFRX_MR_SBMODE_DISCARD … /* Consecutive Preamble Error Threshold Automatic Restart */ #define SPDIFRX_MR_AUTORST_MASK … #define SPDIFRX_MR_AUTORST_NOACTION … #define SPDIFRX_MR_AUTORST_UNLOCK_ON_PRE_ERR … /* * ---- Interrupt Enable/Disable/Mask/Status Register (Write/Read-only) ---- */ #define SPDIFRX_IR_RXRDY … #define SPDIFRX_IR_LOCKED … #define SPDIFRX_IR_LOSS … #define SPDIFRX_IR_BLOCKEND … #define SPDIFRX_IR_SFE … #define SPDIFRX_IR_PAR_ERR … #define SPDIFRX_IR_OVERRUN … #define SPDIFRX_IR_RXFULL … #define SPDIFRX_IR_CSC(ch) … #define SPDIFRX_IR_SECE … #define SPDIFRX_IR_BLOCKST … #define SPDIFRX_IR_NRZ_ERR … #define SPDIFRX_IR_PRE_ERR … #define SPDIFRX_IR_CP_ERR … /* * ---- Receiver Status Register (Read/Write) ---- */ /* Enable Status */ #define SPDIFRX_RSR_ULOCK … #define SPDIFRX_RSR_BADF … #define SPDIFRX_RSR_LOWF … #define SPDIFRX_RSR_NOSIGNAL … #define SPDIFRX_RSR_IFS_MASK … #define SPDIFRX_RSR_IFS(reg) … /* * ---- Version Register (Read-only) ---- */ #define SPDIFRX_VERSION_MASK … #define SPDIFRX_VERSION_MFN_MASK … #define SPDIFRX_VERSION_MFN(reg) … static bool mchp_spdifrx_readable_reg(struct device *dev, unsigned int reg) { … } static bool mchp_spdifrx_writeable_reg(struct device *dev, unsigned int reg) { … } static bool mchp_spdifrx_precious_reg(struct device *dev, unsigned int reg) { … } static bool mchp_spdifrx_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config mchp_spdifrx_regmap_config = …; #define SPDIFRX_GCLK_RATIO_MIN … #define SPDIFRX_CS_BITS … #define SPDIFRX_UD_BITS … #define SPDIFRX_CHANNELS … /** * struct mchp_spdifrx_ch_stat: MCHP SPDIFRX channel status * @data: channel status bits * @done: completion to signal channel status bits acquisition done */ struct mchp_spdifrx_ch_stat { … }; /** * struct mchp_spdifrx_user_data: MCHP SPDIFRX user data * @data: user data bits * @done: completion to signal user data bits acquisition done */ struct mchp_spdifrx_user_data { … }; /** * struct mchp_spdifrx_mixer_control: MCHP SPDIFRX mixer control data structure * @ch_stat: array of channel statuses * @user_data: array of user data * @ulock: ulock bit status * @badf: badf bit status * @signal: signal bit status */ struct mchp_spdifrx_mixer_control { … }; /** * struct mchp_spdifrx_dev: MCHP SPDIFRX device data structure * @capture: DAI DMA configuration data * @control: mixer controls * @mlock: mutex to protect concurency b/w configuration and control APIs * @dev: struct device * @regmap: regmap for this device * @pclk: peripheral clock * @gclk: generic clock * @trigger_enabled: true if enabled though trigger() ops */ struct mchp_spdifrx_dev { … }; static void mchp_spdifrx_channel_status_read(struct mchp_spdifrx_dev *dev, int channel) { … } static void mchp_spdifrx_channel_user_data_read(struct mchp_spdifrx_dev *dev, int channel) { … } static irqreturn_t mchp_spdif_interrupt(int irq, void *dev_id) { … } static int mchp_spdifrx_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { … } static int mchp_spdifrx_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { … } #define MCHP_SPDIF_RATES … #define MCHP_SPDIF_FORMATS … static int mchp_spdifrx_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int mchp_spdifrx_cs_get(struct mchp_spdifrx_dev *dev, int channel, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_cs1_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_cs2_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_cs_mask(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_subcode_ch_get(struct mchp_spdifrx_dev *dev, int channel, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_subcode_ch1_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_subcode_ch2_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_boolean_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int mchp_spdifrx_ulock_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_badf_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_signal_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *uvalue) { … } static int mchp_spdifrx_rate_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int mchp_spdifrx_rate_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static struct snd_kcontrol_new mchp_spdifrx_ctrls[] = …; static int mchp_spdifrx_dai_probe(struct snd_soc_dai *dai) { … } static int mchp_spdifrx_dai_remove(struct snd_soc_dai *dai) { … } static const struct snd_soc_dai_ops mchp_spdifrx_dai_ops = …; static struct snd_soc_dai_driver mchp_spdifrx_dai = …; static const struct snd_soc_component_driver mchp_spdifrx_component = …; static const struct of_device_id mchp_spdifrx_dt_ids[] = …; MODULE_DEVICE_TABLE(of, mchp_spdifrx_dt_ids); static int mchp_spdifrx_runtime_suspend(struct device *dev) { … } static int mchp_spdifrx_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops mchp_spdifrx_pm_ops = …; static int mchp_spdifrx_probe(struct platform_device *pdev) { … } static void mchp_spdifrx_remove(struct platform_device *pdev) { … } static struct platform_driver mchp_spdifrx_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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