drivers/media/platform/rcar-vin/rcar-vin.h

   1 /*
   2  * Driver for Renesas R-Car VIN
   3  *
   4  * Copyright (C) 2016 Renesas Electronics Corp.
   5  * Copyright (C) 2011-2013 Renesas Solutions Corp.
   6  * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
   7  * Copyright (C) 2008 Magnus Damm
   8  *
   9  * Based on the soc-camera rcar_vin driver
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  */
  16
  17 #ifndef __RCAR_VIN__
  18 #define __RCAR_VIN__
  19
  20 #include <media/v4l2-async.h>
  21 #include <media/v4l2-ctrls.h>
  22 #include <media/v4l2-dev.h>
  23 #include <media/v4l2-device.h>
  24 #include <media/videobuf2-v4l2.h>
  25
  26 /* Number of HW buffers */
  27 #define HW_BUFFER_NUM 3
  28
  29 /* Address alignment mask for HW buffers */
  30 #define HW_BUFFER_MASK 0x7f
  31
  32 enum chip_id {
  33         RCAR_GEN2,
  34         RCAR_H1,
  35         RCAR_M1,
  36 };
  37
  38 /**
  39  * STOPPED  - No operation in progress
  40  * RUNNING  - Operation in progress have buffers
  41  * STALLED  - No operation in progress have no buffers
  42  * STOPPING - Stopping operation
  43  */
  44 enum rvin_dma_state {
  45         STOPPED = 0,
  46         RUNNING,
  47         STALLED,
  48         STOPPING,
  49 };
  50
  51 /**
  52  * struct rvin_source_fmt - Source information
  53  * @code:       Media bus format from source
  54  * @width:      Width from source
  55  * @height:     Height from source
  56  */
  57 struct rvin_source_fmt {
  58         u32 code;
  59         u32 width;
  60         u32 height;
  61 };
  62
  63 /**
  64  * struct rvin_video_format - Data format stored in memory
  65  * @fourcc:     Pixelformat
  66  * @bpp:        Bytes per pixel
  67  */
  68 struct rvin_video_format {
  69         u32 fourcc;
  70         u8 bpp;
  71 };
  72
  73 struct rvin_graph_entity {
  74         struct device_node *node;
  75         struct media_entity *entity;
  76
  77         struct v4l2_async_subdev asd;
  78         struct v4l2_subdev *subdev;
  79 };
  80
  81 /**
  82  * struct rvin_dev - Renesas VIN device structure
  83  * @dev:                (OF) device
  84  * @base:               device I/O register space remapped to virtual memory
  85  * @chip:               type of VIN chip
  86  * @mbus_cfg            media bus configuration
  87  *
  88  * @vdev:               V4L2 video device associated with VIN
  89  * @v4l2_dev:           V4L2 device
  90  * @src_pad_idx:        source pad index for media controller drivers
  91  * @ctrl_handler:       V4L2 control handler
  92  * @notifier:           V4L2 asynchronous subdevs notifier
  93  * @entity:             entity in the DT for subdevice
  94  *
  95  * @lock:               protects @queue
  96  * @queue:              vb2 buffers queue
  97  *
  98  * @qlock:              protects @queue_buf, @buf_list, @continuous, @sequence
  99  *                      @state
 100  * @queue_buf:          Keeps track of buffers given to HW slot
 101  * @buf_list:           list of queued buffers
 102  * @continuous:         tracks if active operation is continuous or single mode
 103  * @sequence:           V4L2 buffers sequence number
 104  * @state:              keeps track of operation state
 105  *
 106  * @source:             active format from the video source
 107  * @format:             active V4L2 pixel format
 108  *
 109  * @crop:               active cropping
 110  * @compose:            active composing
 111  */
 112 struct rvin_dev {
 113         struct device *dev;
 114         void __iomem *base;
 115         enum chip_id chip;
 116         struct v4l2_mbus_config mbus_cfg;
 117
 118         struct video_device vdev;
 119         struct v4l2_device v4l2_dev;
 120         int src_pad_idx;
 121         struct v4l2_ctrl_handler ctrl_handler;
 122         struct v4l2_async_notifier notifier;
 123         struct rvin_graph_entity entity;
 124
 125         struct mutex lock;
 126         struct vb2_queue queue;
 127
 128         spinlock_t qlock;
 129         struct vb2_v4l2_buffer *queue_buf[HW_BUFFER_NUM];
 130         struct list_head buf_list;
 131         bool continuous;
 132         unsigned int sequence;
 133         enum rvin_dma_state state;
 134
 135         struct rvin_source_fmt source;
 136         struct v4l2_pix_format format;
 137
 138         struct v4l2_rect crop;
 139         struct v4l2_rect compose;
 140 };
 141
 142 #define vin_to_source(vin)              vin->entity.subdev
 143
 144 /* Debug */
 145 #define vin_dbg(d, fmt, arg...)         dev_dbg(d->dev, fmt, ##arg)
 146 #define vin_info(d, fmt, arg...)        dev_info(d->dev, fmt, ##arg)
 147 #define vin_warn(d, fmt, arg...)        dev_warn(d->dev, fmt, ##arg)
 148 #define vin_err(d, fmt, arg...)         dev_err(d->dev, fmt, ##arg)
 149
 150 int rvin_dma_probe(struct rvin_dev *vin, int irq);
 151 void rvin_dma_remove(struct rvin_dev *vin);
 152
 153 int rvin_v4l2_probe(struct rvin_dev *vin);
 154 void rvin_v4l2_remove(struct rvin_dev *vin);
 155
 156 const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat);
 157
 158 /* Cropping, composing and scaling */
 159 void rvin_scale_try(struct rvin_dev *vin, struct v4l2_pix_format *pix,
 160                     u32 width, u32 height);
 161 void rvin_crop_scale_comp(struct rvin_dev *vin);
 162
 163 #endif