// SPDX-License-Identifier: GPL-2.0-only /* * Driver for Video Capture/Differentiation Engine (VCD) and Encoding * Compression Engine (ECE) present on Nuvoton NPCM SoCs. * * Copyright (C) 2022 Nuvoton Technologies */ #include <linux/atomic.h> #include <linux/bitfield.h> #include <linux/bitmap.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/jiffies.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/of_reserved_mem.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/reset.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/v4l2-controls.h> #include <linux/videodev2.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-dev.h> #include <media/v4l2-device.h> #include <media/v4l2-dv-timings.h> #include <media/v4l2-event.h> #include <media/v4l2-ioctl.h> #include <media/videobuf2-dma-contig.h> #include <uapi/linux/npcm-video.h> #include "npcm-regs.h" #define DEVICE_NAME … #define MAX_WIDTH … #define MAX_HEIGHT … #define MIN_WIDTH … #define MIN_HEIGHT … #define MIN_LP … #define MAX_LP … #define RECT_W … #define RECT_H … #define BITMAP_SIZE … struct npcm_video_addr { … }; struct npcm_video_buffer { … }; #define to_npcm_video_buffer(x) … /* * VIDEO_STREAMING: a flag indicating if the video has started streaming * VIDEO_CAPTURING: a flag indicating if the VCD is capturing a frame * VIDEO_RES_CHANGING: a flag indicating if the resolution is changing * VIDEO_STOPPED: a flag indicating if the video has stopped streaming */ enum { … }; struct rect_list { … }; struct rect_list_info { … }; struct npcm_ece { … }; struct npcm_video { … }; #define to_npcm_video(x) … struct npcm_fmt { … }; static const struct npcm_fmt npcm_fmt_list[] = …; #define NUM_FORMATS … static const struct v4l2_dv_timings_cap npcm_video_timings_cap = …; static DECLARE_BITMAP(bitmap, BITMAP_SIZE); static const struct npcm_fmt *npcm_video_find_format(struct v4l2_format *f) { … } static void npcm_video_ece_prepend_rect_header(void *addr, u16 x, u16 y, u16 w, u16 h) { … } static unsigned int npcm_video_ece_get_ed_size(struct npcm_video *video, unsigned int offset, void *addr) { … } static void npcm_video_ece_enc_rect(struct npcm_video *video, unsigned int r_off_x, unsigned int r_off_y, unsigned int r_w, unsigned int r_h) { … } static unsigned int npcm_video_ece_read_rect_offset(struct npcm_video *video) { … } /* * Set the line pitch (in bytes) for the frame buffers. * Can be on of those values: 512, 1024, 2048, 2560 or 4096 bytes. */ static void npcm_video_ece_set_lp(struct npcm_video *video, unsigned int pitch) { … } static inline void npcm_video_ece_set_fb_addr(struct npcm_video *video, unsigned int buffer) { … } static inline void npcm_video_ece_set_enc_dba(struct npcm_video *video, unsigned int addr) { … } static inline void npcm_video_ece_clear_rect_offset(struct npcm_video *video) { … } static void npcm_video_ece_ctrl_reset(struct npcm_video *video) { … } static void npcm_video_ece_ip_reset(struct npcm_video *video) { … } static void npcm_video_ece_stop(struct npcm_video *video) { … } static bool npcm_video_alloc_fb(struct npcm_video *video, struct npcm_video_addr *addr) { … } static void npcm_video_free_fb(struct npcm_video *video, struct npcm_video_addr *addr) { … } static void npcm_video_free_diff_table(struct npcm_video *video) { … } static unsigned int npcm_video_add_rect(struct npcm_video *video, unsigned int index, unsigned int x, unsigned int y, unsigned int w, unsigned int h) { … } static void npcm_video_merge_rect(struct npcm_video *video, struct rect_list_info *info) { … } static struct rect_list *npcm_video_new_rect(struct npcm_video *video, unsigned int offset, unsigned int index) { … } static int npcm_video_find_rect(struct npcm_video *video, struct rect_list_info *info, unsigned int offset) { … } static int npcm_video_build_table(struct npcm_video *video, struct rect_list_info *info) { … } static void npcm_video_get_rect_list(struct npcm_video *video, unsigned int index) { … } static unsigned int npcm_video_is_mga(struct npcm_video *video) { … } static unsigned int npcm_video_hres(struct npcm_video *video) { … } static unsigned int npcm_video_vres(struct npcm_video *video) { … } static int npcm_video_capres(struct npcm_video *video, unsigned int hor_res, unsigned int vert_res) { … } static void npcm_video_vcd_ip_reset(struct npcm_video *video) { … } static void npcm_video_vcd_state_machine_reset(struct npcm_video *video) { … } static void npcm_video_gfx_reset(struct npcm_video *video) { … } static void npcm_video_kvm_bw(struct npcm_video *video, bool set_bw) { … } static unsigned int npcm_video_pclk(struct npcm_video *video) { … } static unsigned int npcm_video_get_bpp(struct npcm_video *video) { … } /* * Pitch must be a power of 2, >= linebytes, * at least 512, and no more than 4096. */ static void npcm_video_set_linepitch(struct npcm_video *video, unsigned int linebytes) { … } static unsigned int npcm_video_get_linepitch(struct npcm_video *video) { … } static void npcm_video_command(struct npcm_video *video, unsigned int value) { … } static void npcm_video_init_reg(struct npcm_video *video) { … } static int npcm_video_start_frame(struct npcm_video *video) { … } static void npcm_video_bufs_done(struct npcm_video *video, enum vb2_buffer_state state) { … } static void npcm_video_get_diff_rect(struct npcm_video *video, unsigned int index) { … } static void npcm_video_detect_resolution(struct npcm_video *video) { … } static int npcm_video_set_resolution(struct npcm_video *video, struct v4l2_bt_timings *timing) { … } static void npcm_video_start(struct npcm_video *video) { … } static void npcm_video_stop(struct npcm_video *video) { … } static unsigned int npcm_video_raw(struct npcm_video *video, int index, void *addr) { … } static unsigned int npcm_video_hextile(struct npcm_video *video, unsigned int index, unsigned int dma_addr, void *vaddr) { … } static irqreturn_t npcm_video_irq(int irq, void *arg) { … } static int npcm_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) { … } static int npcm_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f) { … } static int npcm_video_try_format(struct file *file, void *fh, struct v4l2_format *f) { … } static int npcm_video_get_format(struct file *file, void *fh, struct v4l2_format *f) { … } static int npcm_video_set_format(struct file *file, void *fh, struct v4l2_format *f) { … } static int npcm_video_enum_input(struct file *file, void *fh, struct v4l2_input *inp) { … } static int npcm_video_get_input(struct file *file, void *fh, unsigned int *i) { … } static int npcm_video_set_input(struct file *file, void *fh, unsigned int i) { … } static int npcm_video_set_dv_timings(struct file *file, void *fh, struct v4l2_dv_timings *timings) { … } static int npcm_video_get_dv_timings(struct file *file, void *fh, struct v4l2_dv_timings *timings) { … } static int npcm_video_query_dv_timings(struct file *file, void *fh, struct v4l2_dv_timings *timings) { … } static int npcm_video_enum_dv_timings(struct file *file, void *fh, struct v4l2_enum_dv_timings *timings) { … } static int npcm_video_dv_timings_cap(struct file *file, void *fh, struct v4l2_dv_timings_cap *cap) { … } static int npcm_video_sub_event(struct v4l2_fh *fh, const struct v4l2_event_subscription *sub) { … } static const struct v4l2_ioctl_ops npcm_video_ioctls = …; static int npcm_video_set_ctrl(struct v4l2_ctrl *ctrl) { … } static const struct v4l2_ctrl_ops npcm_video_ctrl_ops = …; static const char * const npcm_ctrl_capture_mode_menu[] = …; static const struct v4l2_ctrl_config npcm_ctrl_capture_mode = …; /* * This control value is set when a buffer is dequeued by userspace, i.e. in * npcm_video_buf_finish function. */ static const struct v4l2_ctrl_config npcm_ctrl_rect_count = …; static int npcm_video_open(struct file *file) { … } static int npcm_video_release(struct file *file) { … } static const struct v4l2_file_operations npcm_video_v4l2_fops = …; static int npcm_video_queue_setup(struct vb2_queue *q, unsigned int *num_buffers, unsigned int *num_planes, unsigned int sizes[], struct device *alloc_devs[]) { … } static int npcm_video_buf_prepare(struct vb2_buffer *vb) { … } static int npcm_video_start_streaming(struct vb2_queue *q, unsigned int count) { … } static void npcm_video_stop_streaming(struct vb2_queue *q) { … } static void npcm_video_buf_queue(struct vb2_buffer *vb) { … } static void npcm_video_buf_finish(struct vb2_buffer *vb) { … } static const struct regmap_config npcm_video_regmap_cfg = …; static const struct regmap_config npcm_video_ece_regmap_cfg = …; static const struct vb2_ops npcm_video_vb2_ops = …; static int npcm_video_setup_video(struct npcm_video *video) { … } static int npcm_video_ece_init(struct npcm_video *video) { … } static int npcm_video_init(struct npcm_video *video) { … } static int npcm_video_probe(struct platform_device *pdev) { … } static void npcm_video_remove(struct platform_device *pdev) { … } static const struct of_device_id npcm_video_match[] = …; MODULE_DEVICE_TABLE(of, npcm_video_match); static struct platform_driver npcm_video_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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