// SPDX-License-Identifier: GPL-2.0 /* * SuperH Video Output Unit (VOU) driver * * Copyright (C) 2010, Guennadi Liakhovetski <[email protected]> */ #include <linux/dma-mapping.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/videodev2.h> #include <linux/module.h> #include <media/drv-intf/sh_vou.h> #include <media/v4l2-common.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-mediabus.h> #include <media/videobuf2-v4l2.h> #include <media/videobuf2-dma-contig.h> /* Mirror addresses are not available for all registers */ #define VOUER … #define VOUCR … #define VOUSTR … #define VOUVCR … #define VOUISR … #define VOUBCR … #define VOUDPR … #define VOUDSR … #define VOUVPR … #define VOUIR … #define VOUSRR … #define VOUMSR … #define VOUHIR … #define VOUDFR … #define VOUAD1R … #define VOUAD2R … #define VOUAIR … #define VOUSWR … #define VOURCR … #define VOURPR … enum sh_vou_status { … }; #define VOU_MIN_IMAGE_WIDTH … #define VOU_MAX_IMAGE_WIDTH … #define VOU_MIN_IMAGE_HEIGHT … struct sh_vou_buffer { … }; static inline struct sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2) { … } struct sh_vou_device { … }; /* Register access routines for sides A, B and mirror addresses */ static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg, u32 value) { … } static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg, u32 value) { … } static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg, u32 value) { … } static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg) { … } static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg, u32 value, u32 mask) { … } static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg, u32 value, u32 mask) { … } static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg, u32 value, u32 mask) { … } struct sh_vou_fmt { … }; /* Further pixel formats can be added */ static struct sh_vou_fmt vou_fmt[] = …; static void sh_vou_schedule_next(struct sh_vou_device *vou_dev, struct vb2_v4l2_buffer *vbuf) { … } static void sh_vou_stream_config(struct sh_vou_device *vou_dev) { … } /* Locking: caller holds fop_lock mutex */ static int sh_vou_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { … } static int sh_vou_buf_prepare(struct vb2_buffer *vb) { … } /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */ static void sh_vou_buf_queue(struct vb2_buffer *vb) { … } static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count) { … } static void sh_vou_stop_streaming(struct vb2_queue *vq) { … } static const struct vb2_ops sh_vou_qops = …; /* Video IOCTLs */ static int sh_vou_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { … } /* Enumerate formats, that the device can accept from the user */ static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv, struct v4l2_fmtdesc *fmt) { … } static int sh_vou_g_fmt_vid_out(struct file *file, void *priv, struct v4l2_format *fmt) { … } static const unsigned char vou_scale_h_num[] = …; static const unsigned char vou_scale_h_den[] = …; static const unsigned char vou_scale_h_fld[] = …; static const unsigned char vou_scale_v_num[] = …; static const unsigned char vou_scale_v_den[] = …; static const unsigned char vou_scale_v_fld[] = …; static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev, int pix_idx, int w_idx, int h_idx) { … } struct sh_vou_geometry { … }; /* * Find input geometry, that we can use to produce output, closest to the * requested rectangle, using VOU scaling */ static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std) { … } /* * Find output geometry, that we can produce, using VOU scaling, closest to * the requested rectangle */ static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std) { … } static int sh_vou_try_fmt_vid_out(struct file *file, void *priv, struct v4l2_format *fmt) { … } static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev, struct v4l2_pix_format *pix) { … } static int sh_vou_s_fmt_vid_out(struct file *file, void *priv, struct v4l2_format *fmt) { … } static int sh_vou_enum_output(struct file *file, void *fh, struct v4l2_output *a) { … } static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i) { … } static int sh_vou_s_output(struct file *file, void *fh, unsigned int i) { … } static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt) { … } static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id) { … } static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std) { … } static int sh_vou_log_status(struct file *file, void *priv) { … } static int sh_vou_g_selection(struct file *file, void *fh, struct v4l2_selection *sel) { … } /* Assume a dull encoder, do all the work ourselves. */ static int sh_vou_s_selection(struct file *file, void *fh, struct v4l2_selection *sel) { … } static irqreturn_t sh_vou_isr(int irq, void *dev_id) { … } static int sh_vou_hw_init(struct sh_vou_device *vou_dev) { … } /* File operations */ static int sh_vou_open(struct file *file) { … } static int sh_vou_release(struct file *file) { … } /* sh_vou display ioctl operations */ static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = …; static const struct v4l2_file_operations sh_vou_fops = …; static const struct video_device sh_vou_video_template = …; static int sh_vou_probe(struct platform_device *pdev) { … } static void sh_vou_remove(struct platform_device *pdev) { … } static struct platform_driver sh_vou = …; module_platform_driver_probe(…); MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_VERSION(…) …; MODULE_ALIAS(…) …;
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