// SPDX-License-Identifier: GPL-2.0-only /* * Samsung S5P/EXYNOS SoC series MIPI-CSI receiver driver * * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd. * Author: Sylwester Nawrocki <[email protected]> */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/kernel.h> #include <linux/memory.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_graph.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <linux/sizes.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/videodev2.h> #include <media/drv-intf/exynos-fimc.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-subdev.h> #include "mipi-csis.h" static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(…) …; /* Register map definition */ /* CSIS global control */ #define S5PCSIS_CTRL … #define S5PCSIS_CTRL_DPDN_DEFAULT … #define S5PCSIS_CTRL_DPDN_SWAP … #define S5PCSIS_CTRL_ALIGN_32BIT … #define S5PCSIS_CTRL_UPDATE_SHADOW … #define S5PCSIS_CTRL_WCLK_EXTCLK … #define S5PCSIS_CTRL_RESET … #define S5PCSIS_CTRL_ENABLE … /* D-PHY control */ #define S5PCSIS_DPHYCTRL … #define S5PCSIS_DPHYCTRL_HSS_MASK … #define S5PCSIS_DPHYCTRL_ENABLE … #define S5PCSIS_CONFIG … #define S5PCSIS_CFG_FMT_YCBCR422_8BIT … #define S5PCSIS_CFG_FMT_RAW8 … #define S5PCSIS_CFG_FMT_RAW10 … #define S5PCSIS_CFG_FMT_RAW12 … /* User defined formats, x = 1...4 */ #define S5PCSIS_CFG_FMT_USER(x) … #define S5PCSIS_CFG_FMT_MASK … #define S5PCSIS_CFG_NR_LANE_MASK … /* Interrupt mask */ #define S5PCSIS_INTMSK … #define S5PCSIS_INTMSK_EVEN_BEFORE … #define S5PCSIS_INTMSK_EVEN_AFTER … #define S5PCSIS_INTMSK_ODD_BEFORE … #define S5PCSIS_INTMSK_ODD_AFTER … #define S5PCSIS_INTMSK_FRAME_START … #define S5PCSIS_INTMSK_FRAME_END … #define S5PCSIS_INTMSK_ERR_SOT_HS … #define S5PCSIS_INTMSK_ERR_LOST_FS … #define S5PCSIS_INTMSK_ERR_LOST_FE … #define S5PCSIS_INTMSK_ERR_OVER … #define S5PCSIS_INTMSK_ERR_ECC … #define S5PCSIS_INTMSK_ERR_CRC … #define S5PCSIS_INTMSK_ERR_UNKNOWN … #define S5PCSIS_INTMSK_EXYNOS4_EN_ALL … #define S5PCSIS_INTMSK_EXYNOS5_EN_ALL … /* Interrupt source */ #define S5PCSIS_INTSRC … #define S5PCSIS_INTSRC_EVEN_BEFORE … #define S5PCSIS_INTSRC_EVEN_AFTER … #define S5PCSIS_INTSRC_EVEN … #define S5PCSIS_INTSRC_ODD_BEFORE … #define S5PCSIS_INTSRC_ODD_AFTER … #define S5PCSIS_INTSRC_ODD … #define S5PCSIS_INTSRC_NON_IMAGE_DATA … #define S5PCSIS_INTSRC_FRAME_START … #define S5PCSIS_INTSRC_FRAME_END … #define S5PCSIS_INTSRC_ERR_SOT_HS … #define S5PCSIS_INTSRC_ERR_LOST_FS … #define S5PCSIS_INTSRC_ERR_LOST_FE … #define S5PCSIS_INTSRC_ERR_OVER … #define S5PCSIS_INTSRC_ERR_ECC … #define S5PCSIS_INTSRC_ERR_CRC … #define S5PCSIS_INTSRC_ERR_UNKNOWN … #define S5PCSIS_INTSRC_ERRORS … /* Pixel resolution */ #define S5PCSIS_RESOL … #define CSIS_MAX_PIX_WIDTH … #define CSIS_MAX_PIX_HEIGHT … /* Non-image packet data buffers */ #define S5PCSIS_PKTDATA_ODD … #define S5PCSIS_PKTDATA_EVEN … #define S5PCSIS_PKTDATA_SIZE … enum { … }; static char *csi_clock_name[] = …; #define NUM_CSIS_CLOCKS … #define DEFAULT_SCLK_CSIS_FREQ … static const char * const csis_supply_name[] = …; #define CSIS_NUM_SUPPLIES … enum { … }; struct s5pcsis_event { … }; static const struct s5pcsis_event s5pcsis_events[] = …; #define S5PCSIS_NUM_EVENTS … struct csis_pktbuf { … }; struct csis_drvdata { … }; /** * struct csis_state - the driver's internal state data structure * @lock: mutex serializing the subdev and power management operations, * protecting @format and @flags members * @pads: CSIS pads array * @sd: v4l2_subdev associated with CSIS device instance * @index: the hardware instance index * @pdev: CSIS platform device * @phy: pointer to the CSIS generic PHY * @regs: mmapped I/O registers memory * @supplies: CSIS regulator supplies * @clock: CSIS clocks * @irq: requested s5p-mipi-csis irq number * @interrupt_mask: interrupt mask of the all used interrupts * @flags: the state variable for power and streaming control * @clk_frequency: device bus clock frequency * @hs_settle: HS-RX settle time * @num_lanes: number of MIPI-CSI data lanes used * @max_num_lanes: maximum number of MIPI-CSI data lanes supported * @wclk_ext: CSI wrapper clock: 0 - bus clock, 1 - external SCLK_CAM * @csis_fmt: current CSIS pixel format * @format: common media bus format for the source and sink pad * @slock: spinlock protecting structure members below * @pkt_buf: the frame embedded (non-image) data buffer * @events: MIPI-CSIS event (error) counters */ struct csis_state { … }; /** * struct csis_pix_format - CSIS pixel format description * @pix_width_alignment: horizontal pixel alignment, width will be * multiple of 2^pix_width_alignment * @code: corresponding media bus code * @fmt_reg: S5PCSIS_CONFIG register value * @data_alignment: MIPI-CSI data alignment in bits */ struct csis_pix_format { … }; static const struct csis_pix_format s5pcsis_formats[] = …; #define s5pcsis_write(__csis, __r, __v) … #define s5pcsis_read(__csis, __r) … static struct csis_state *sd_to_csis_state(struct v4l2_subdev *sdev) { … } static const struct csis_pix_format *find_csis_format( struct v4l2_mbus_framefmt *mf) { … } static void s5pcsis_enable_interrupts(struct csis_state *state, bool on) { … } static void s5pcsis_reset(struct csis_state *state) { … } static void s5pcsis_system_enable(struct csis_state *state, int on) { … } /* Called with the state.lock mutex held */ static void __s5pcsis_set_format(struct csis_state *state) { … } static void s5pcsis_set_hsync_settle(struct csis_state *state, int settle) { … } static void s5pcsis_set_params(struct csis_state *state) { … } static void s5pcsis_clk_put(struct csis_state *state) { … } static int s5pcsis_clk_get(struct csis_state *state) { … } static void dump_regs(struct csis_state *state, const char *label) { … } static void s5pcsis_start_stream(struct csis_state *state) { … } static void s5pcsis_stop_stream(struct csis_state *state) { … } static void s5pcsis_clear_counters(struct csis_state *state) { … } static void s5pcsis_log_counters(struct csis_state *state, bool non_errors) { … } /* * V4L2 subdev operations */ static int s5pcsis_s_power(struct v4l2_subdev *sd, int on) { … } static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable) { … } static int s5pcsis_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { … } static struct csis_pix_format const *s5pcsis_try_format( struct v4l2_mbus_framefmt *mf) { … } static struct v4l2_mbus_framefmt *__s5pcsis_get_format( struct csis_state *state, struct v4l2_subdev_state *sd_state, enum v4l2_subdev_format_whence which) { … } static int s5pcsis_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { … } static int s5pcsis_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { … } static int s5pcsis_s_rx_buffer(struct v4l2_subdev *sd, void *buf, unsigned int *size) { … } static int s5pcsis_log_status(struct v4l2_subdev *sd) { … } static const struct v4l2_subdev_core_ops s5pcsis_core_ops = …; static const struct v4l2_subdev_pad_ops s5pcsis_pad_ops = …; static const struct v4l2_subdev_video_ops s5pcsis_video_ops = …; static const struct v4l2_subdev_ops s5pcsis_subdev_ops = …; static irqreturn_t s5pcsis_irq_handler(int irq, void *dev_id) { … } static int s5pcsis_parse_dt(struct platform_device *pdev, struct csis_state *state) { … } static int s5pcsis_pm_resume(struct device *dev, bool runtime); static const struct of_device_id s5pcsis_of_match[]; static int s5pcsis_probe(struct platform_device *pdev) { … } static int s5pcsis_pm_suspend(struct device *dev, bool runtime) { … } static int s5pcsis_pm_resume(struct device *dev, bool runtime) { … } #ifdef CONFIG_PM_SLEEP static int s5pcsis_suspend(struct device *dev) { … } static int s5pcsis_resume(struct device *dev) { … } #endif #ifdef CONFIG_PM static int s5pcsis_runtime_suspend(struct device *dev) { … } static int s5pcsis_runtime_resume(struct device *dev) { … } #endif static void s5pcsis_remove(struct platform_device *pdev) { … } static const struct dev_pm_ops s5pcsis_pm_ops = …; static const struct csis_drvdata exynos4_csis_drvdata = …; static const struct csis_drvdata exynos5_csis_drvdata = …; static const struct of_device_id s5pcsis_of_match[] = …; MODULE_DEVICE_TABLE(of, s5pcsis_of_match); static struct platform_driver s5pcsis_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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