// SPDX-License-Identifier: GPL-2.0 /* * Driver for STM32 Digital Camera Memory Interface * * Copyright (C) STMicroelectronics SA 2017 * Authors: Yannick Fertre <[email protected]> * Hugues Fruchet <[email protected]> * for STMicroelectronics. * * This driver is based on atmel_isi.c * */ #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_graph.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #include <linux/videodev2.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-dev.h> #include <media/v4l2-device.h> #include <media/v4l2-event.h> #include <media/v4l2-fwnode.h> #include <media/v4l2-image-sizes.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-rect.h> #include <media/videobuf2-dma-contig.h> #define DRV_NAME … /* Registers offset for DCMI */ #define DCMI_CR … #define DCMI_SR … #define DCMI_RIS … #define DCMI_IER … #define DCMI_MIS … #define DCMI_ICR … #define DCMI_ESCR … #define DCMI_ESUR … #define DCMI_CWSTRT … #define DCMI_CWSIZE … #define DCMI_DR … #define DCMI_IDR … /* Bits definition for control register (DCMI_CR) */ #define CR_CAPTURE … #define CR_CM … #define CR_CROP … #define CR_JPEG … #define CR_ESS … #define CR_PCKPOL … #define CR_HSPOL … #define CR_VSPOL … #define CR_FCRC_0 … #define CR_FCRC_1 … #define CR_EDM_0 … #define CR_EDM_1 … #define CR_ENABLE … /* Bits definition for status register (DCMI_SR) */ #define SR_HSYNC … #define SR_VSYNC … #define SR_FNE … /* * Bits definition for interrupt registers * (DCMI_RIS, DCMI_IER, DCMI_MIS, DCMI_ICR) */ #define IT_FRAME … #define IT_OVR … #define IT_ERR … #define IT_VSYNC … #define IT_LINE … enum state { … }; #define MIN_WIDTH … #define MAX_WIDTH … #define MIN_HEIGHT … #define MAX_HEIGHT … #define TIMEOUT_MS … #define OVERRUN_ERROR_THRESHOLD … struct dcmi_format { … }; struct dcmi_framesize { … }; struct dcmi_buf { … }; struct stm32_dcmi { … }; static inline struct stm32_dcmi *notifier_to_dcmi(struct v4l2_async_notifier *n) { … } static inline u32 reg_read(void __iomem *base, u32 reg) { … } static inline void reg_write(void __iomem *base, u32 reg, u32 val) { … } static inline void reg_set(void __iomem *base, u32 reg, u32 mask) { … } static inline void reg_clear(void __iomem *base, u32 reg, u32 mask) { … } static int dcmi_start_capture(struct stm32_dcmi *dcmi, struct dcmi_buf *buf); static void dcmi_buffer_done(struct stm32_dcmi *dcmi, struct dcmi_buf *buf, size_t bytesused, int err) { … } static int dcmi_restart_capture(struct stm32_dcmi *dcmi) { … } static void dcmi_dma_callback(void *param) { … } static int dcmi_start_dma(struct stm32_dcmi *dcmi, struct dcmi_buf *buf) { … } static int dcmi_start_capture(struct stm32_dcmi *dcmi, struct dcmi_buf *buf) { … } static void dcmi_set_crop(struct stm32_dcmi *dcmi) { … } static void dcmi_process_jpeg(struct stm32_dcmi *dcmi) { … } static irqreturn_t dcmi_irq_thread(int irq, void *arg) { … } static irqreturn_t dcmi_irq_callback(int irq, void *arg) { … } static int dcmi_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { … } static int dcmi_buf_init(struct vb2_buffer *vb) { … } static int dcmi_buf_prepare(struct vb2_buffer *vb) { … } static void dcmi_buf_queue(struct vb2_buffer *vb) { … } static struct media_entity *dcmi_find_source(struct stm32_dcmi *dcmi) { … } static int dcmi_pipeline_s_fmt(struct stm32_dcmi *dcmi, struct v4l2_subdev_format *format) { … } static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count) { … } static void dcmi_stop_streaming(struct vb2_queue *vq) { … } static const struct vb2_ops dcmi_video_qops = …; static int dcmi_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *fmt) { … } static const struct dcmi_format *find_format_by_fourcc(struct stm32_dcmi *dcmi, unsigned int fourcc) { … } static void __find_outer_frame_size(struct stm32_dcmi *dcmi, struct v4l2_pix_format *pix, struct dcmi_framesize *framesize) { … } static int dcmi_try_fmt(struct stm32_dcmi *dcmi, struct v4l2_format *f, const struct dcmi_format **sd_format, struct dcmi_framesize *sd_framesize) { … } static int dcmi_set_fmt(struct stm32_dcmi *dcmi, struct v4l2_format *f) { … } static int dcmi_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int dcmi_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int dcmi_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { … } static int dcmi_get_sensor_format(struct stm32_dcmi *dcmi, struct v4l2_pix_format *pix) { … } static int dcmi_set_sensor_format(struct stm32_dcmi *dcmi, struct v4l2_pix_format *pix) { … } static int dcmi_get_sensor_bounds(struct stm32_dcmi *dcmi, struct v4l2_rect *r) { … } static int dcmi_g_selection(struct file *file, void *fh, struct v4l2_selection *s) { … } static int dcmi_s_selection(struct file *file, void *priv, struct v4l2_selection *s) { … } static int dcmi_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { … } static int dcmi_enum_input(struct file *file, void *priv, struct v4l2_input *i) { … } static int dcmi_g_input(struct file *file, void *priv, unsigned int *i) { … } static int dcmi_s_input(struct file *file, void *priv, unsigned int i) { … } static int dcmi_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { … } static int dcmi_g_parm(struct file *file, void *priv, struct v4l2_streamparm *p) { … } static int dcmi_s_parm(struct file *file, void *priv, struct v4l2_streamparm *p) { … } static int dcmi_enum_frameintervals(struct file *file, void *fh, struct v4l2_frmivalenum *fival) { … } static const struct of_device_id stm32_dcmi_of_match[] = …; MODULE_DEVICE_TABLE(of, stm32_dcmi_of_match); static int dcmi_open(struct file *file) { … } static int dcmi_release(struct file *file) { … } static const struct v4l2_ioctl_ops dcmi_ioctl_ops = …; static const struct v4l2_file_operations dcmi_fops = …; static int dcmi_set_default_fmt(struct stm32_dcmi *dcmi) { … } static const struct dcmi_format dcmi_formats[] = …; static int dcmi_formats_init(struct stm32_dcmi *dcmi) { … } static int dcmi_framesizes_init(struct stm32_dcmi *dcmi) { … } static int dcmi_graph_notify_complete(struct v4l2_async_notifier *notifier) { … } static void dcmi_graph_notify_unbind(struct v4l2_async_notifier *notifier, struct v4l2_subdev *sd, struct v4l2_async_connection *asd) { … } static int dcmi_graph_notify_bound(struct v4l2_async_notifier *notifier, struct v4l2_subdev *subdev, struct v4l2_async_connection *asd) { … } static const struct v4l2_async_notifier_operations dcmi_graph_notify_ops = …; static int dcmi_graph_init(struct stm32_dcmi *dcmi) { … } static int dcmi_probe(struct platform_device *pdev) { … } static void dcmi_remove(struct platform_device *pdev) { … } static __maybe_unused int dcmi_runtime_suspend(struct device *dev) { … } static __maybe_unused int dcmi_runtime_resume(struct device *dev) { … } static __maybe_unused int dcmi_suspend(struct device *dev) { … } static __maybe_unused int dcmi_resume(struct device *dev) { … } static const struct dev_pm_ops dcmi_pm_ops = …; static struct platform_driver stm32_dcmi_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux