// SPDX-License-Identifier: GPL-2.0-only /* * Microchip CSI2 Demux Controller (CSI2DC) driver * * Copyright (C) 2018 Microchip Technology, Inc. * * Author: Eugen Hristev <[email protected]> * */ #include <linux/clk.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/videodev2.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-subdev.h> /* Global configuration register */ #define CSI2DC_GCFG … /* MIPI sensor pixel clock is free running */ #define CSI2DC_GCFG_MIPIFRN … /* GPIO parallel interface selection */ #define CSI2DC_GCFG_GPIOSEL … /* Output waveform inter-line minimum delay */ #define CSI2DC_GCFG_HLC(v) … #define CSI2DC_GCFG_HLC_MASK … /* SAMA7G5 requires a HLC delay of 15 */ #define SAMA7G5_HLC … /* Global control register */ #define CSI2DC_GCTLR … #define CSI2DC_GCTLR_SWRST … /* Global status register */ #define CSI2DC_GS … /* SSP interrupt status register */ #define CSI2DC_SSPIS … /* Pipe update register */ #define CSI2DC_PU … /* Video pipe attributes update */ #define CSI2DC_PU_VP … /* Pipe update status register */ #define CSI2DC_PUS … /* Video pipeline Interrupt Status Register */ #define CSI2DC_VPISR … /* Video pipeline enable register */ #define CSI2DC_VPE … #define CSI2DC_VPE_ENABLE … /* Video pipeline configuration register */ #define CSI2DC_VPCFG … /* Data type */ #define CSI2DC_VPCFG_DT(v) … #define CSI2DC_VPCFG_DT_MASK … /* Virtual channel identifier */ #define CSI2DC_VPCFG_VC(v) … #define CSI2DC_VPCFG_VC_MASK … /* Decompression enable */ #define CSI2DC_VPCFG_DE … /* Decoder mode */ #define CSI2DC_VPCFG_DM(v) … #define CSI2DC_VPCFG_DM_DECODER8TO12 … /* Decoder predictor 2 selection */ #define CSI2DC_VPCFG_DP2 … /* Recommended memory storage */ #define CSI2DC_VPCFG_RMS … /* Post adjustment */ #define CSI2DC_VPCFG_PA … /* Video pipeline column register */ #define CSI2DC_VPCOL … /* Column number */ #define CSI2DC_VPCOL_COL(v) … #define CSI2DC_VPCOL_COL_MASK … /* Video pipeline row register */ #define CSI2DC_VPROW … /* Row number */ #define CSI2DC_VPROW_ROW(v) … #define CSI2DC_VPROW_ROW_MASK … /* Version register */ #define CSI2DC_VERSION … /* register read/write helpers */ #define csi2dc_readl(st, reg) … #define csi2dc_writel(st, reg, val) … /* supported RAW data types */ #define CSI2DC_DT_RAW6 … #define CSI2DC_DT_RAW7 … #define CSI2DC_DT_RAW8 … #define CSI2DC_DT_RAW10 … #define CSI2DC_DT_RAW12 … #define CSI2DC_DT_RAW14 … /* YUV data types */ #define CSI2DC_DT_YUV422_8B … /* * struct csi2dc_format - CSI2DC format type struct * @mbus_code: Media bus code for the format * @dt: Data type constant for this format */ struct csi2dc_format { … }; static const struct csi2dc_format csi2dc_formats[] = …; enum mipi_csi_pads { … }; /* * struct csi2dc_device - CSI2DC device driver data/config struct * @base: Register map base address * @csi2dc_sd: v4l2 subdevice for the csi2dc device * This is the subdevice that the csi2dc device itself * registers in v4l2 subsystem * @dev: struct device for this csi2dc device * @pclk: Peripheral clock reference * Input clock that clocks the hardware block internal * logic * @scck: Sensor Controller clock reference * Input clock that is used to generate the pixel clock * @format: Current saved format used in g/s fmt * @cur_fmt: Current state format * @try_fmt: Try format that is being tried * @pads: Media entity pads for the csi2dc subdevice * @clk_gated: Whether the clock is gated or free running * @video_pipe: Whether video pipeline is configured * @parallel_mode: The underlying subdevice is connected on a parallel bus * @vc: Current set virtual channel * @notifier: Async notifier that is used to bound the underlying * subdevice to the csi2dc subdevice * @input_sd: Reference to the underlying subdevice bound to the * csi2dc subdevice * @remote_pad: Pad number of the underlying subdevice that is linked * to the csi2dc subdevice sink pad. */ struct csi2dc_device { … }; static inline struct csi2dc_device * csi2dc_sd_to_csi2dc_device(struct v4l2_subdev *csi2dc_sd) { … } static int csi2dc_enum_mbus_code(struct v4l2_subdev *csi2dc_sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { … } static int csi2dc_get_fmt(struct v4l2_subdev *csi2dc_sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *format) { … } static int csi2dc_set_fmt(struct v4l2_subdev *csi2dc_sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *req_fmt) { … } static int csi2dc_power(struct csi2dc_device *csi2dc, int on) { … } static int csi2dc_get_mbus_config(struct csi2dc_device *csi2dc) { … } static void csi2dc_vp_update(struct csi2dc_device *csi2dc) { … } static int csi2dc_s_stream(struct v4l2_subdev *csi2dc_sd, int enable) { … } static int csi2dc_init_state(struct v4l2_subdev *csi2dc_sd, struct v4l2_subdev_state *sd_state) { … } static const struct media_entity_operations csi2dc_entity_ops = …; static const struct v4l2_subdev_pad_ops csi2dc_pad_ops = …; static const struct v4l2_subdev_video_ops csi2dc_video_ops = …; static const struct v4l2_subdev_ops csi2dc_subdev_ops = …; static const struct v4l2_subdev_internal_ops csi2dc_internal_ops = …; static int csi2dc_async_bound(struct v4l2_async_notifier *notifier, struct v4l2_subdev *subdev, struct v4l2_async_connection *asd) { … } static const struct v4l2_async_notifier_operations csi2dc_async_ops = …; static int csi2dc_prepare_notifier(struct csi2dc_device *csi2dc, struct fwnode_handle *input_fwnode) { … } static int csi2dc_of_parse(struct csi2dc_device *csi2dc, struct device_node *of_node) { … } static void csi2dc_default_format(struct csi2dc_device *csi2dc) { … } static int csi2dc_probe(struct platform_device *pdev) { … } static void csi2dc_remove(struct platform_device *pdev) { … } static int __maybe_unused csi2dc_runtime_suspend(struct device *dev) { … } static int __maybe_unused csi2dc_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops csi2dc_dev_pm_ops = …; static const struct of_device_id csi2dc_of_match[] = …; MODULE_DEVICE_TABLE(of, csi2dc_of_match); static struct platform_driver csi2dc_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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