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_H1,
  34         RCAR_M1,
  35         RCAR_GEN2,
  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  * @width:      Width from source
  54  * @height:     Height from source
  55  */
  56 struct rvin_source_fmt {
  57         u32 width;
  58         u32 height;
  59 };
  60
  61 /**
  62  * struct rvin_video_format - Data format stored in memory
  63  * @fourcc:     Pixelformat
  64  * @bpp:        Bytes per pixel
  65  */
  66 struct rvin_video_format {
  67         u32 fourcc;
  68         u8 bpp;
  69 };
  70
  71 /**
  72  * struct rvin_graph_entity - Video endpoint from async framework
  73  * @asd:        sub-device descriptor for async framework
  74  * @subdev:     subdevice matched using async framework
  75  * @code:       Media bus format from source
  76  * @mbus_cfg:   Media bus format from DT
  77  * @source_pad: source pad of remote subdevice
  78  * @sink_pad:   sink pad of remote subdevice
  79  */
  80 struct rvin_graph_entity {
  81         struct v4l2_async_subdev asd;
  82         struct v4l2_subdev *subdev;
  83
  84         u32 code;
  85         struct v4l2_mbus_config mbus_cfg;
  86
  87         unsigned int source_pad;
  88         unsigned int sink_pad;
  89 };
  90
  91 /**
  92  * struct rvin_dev - Renesas VIN device structure
  93  * @dev:                (OF) device
  94  * @base:               device I/O register space remapped to virtual memory
  95  * @chip:               type of VIN chip
  96  *
  97  * @vdev:               V4L2 video device associated with VIN
  98  * @v4l2_dev:           V4L2 device
  99  * @ctrl_handler:       V4L2 control handler
 100  * @notifier:           V4L2 asynchronous subdevs notifier
 101  * @digital:            entity in the DT for local digital subdevice
 102  *
 103  * @lock:               protects @queue
 104  * @queue:              vb2 buffers queue
 105  *
 106  * @qlock:              protects @queue_buf, @buf_list, @continuous, @sequence
 107  *                      @state
 108  * @queue_buf:          Keeps track of buffers given to HW slot
 109  * @buf_list:           list of queued buffers
 110  * @continuous:         tracks if active operation is continuous or single mode
 111  * @sequence:           V4L2 buffers sequence number
 112  * @state:              keeps track of operation state
 113  *
 114  * @source:             active format from the video source
 115  * @format:             active V4L2 pixel format
 116  *
 117  * @crop:               active cropping
 118  * @compose:            active composing
 119  */
 120 struct rvin_dev {
 121         struct device *dev;
 122         void __iomem *base;
 123         enum chip_id chip;
 124
 125         struct video_device vdev;
 126         struct v4l2_device v4l2_dev;
 127         struct v4l2_ctrl_handler ctrl_handler;
 128         struct v4l2_async_notifier notifier;
 129         struct rvin_graph_entity digital;
 130
 131         struct mutex lock;
 132         struct vb2_queue queue;
 133
 134         spinlock_t qlock;
 135         struct vb2_v4l2_buffer *queue_buf[HW_BUFFER_NUM];
 136         struct list_head buf_list;
 137         bool continuous;
 138         unsigned int sequence;
 139         enum rvin_dma_state state;
 140
 141         struct rvin_source_fmt source;
 142         struct v4l2_pix_format format;
 143
 144         struct v4l2_rect crop;
 145         struct v4l2_rect compose;
 146 };
 147
 148 #define vin_to_source(vin)              vin->digital.subdev
 149
 150 /* Debug */
 151 #define vin_dbg(d, fmt, arg...)         dev_dbg(d->dev, fmt, ##arg)
 152 #define vin_info(d, fmt, arg...)        dev_info(d->dev, fmt, ##arg)
 153 #define vin_warn(d, fmt, arg...)        dev_warn(d->dev, fmt, ##arg)
 154 #define vin_err(d, fmt, arg...)         dev_err(d->dev, fmt, ##arg)
 155
 156 int rvin_dma_probe(struct rvin_dev *vin, int irq);
 157 void rvin_dma_remove(struct rvin_dev *vin);
 158
 159 int rvin_v4l2_probe(struct rvin_dev *vin);
 160 void rvin_v4l2_remove(struct rvin_dev *vin);
 161
 162 const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat);
 163
 164 /* Cropping, composing and scaling */
 165 void rvin_scale_try(struct rvin_dev *vin, struct v4l2_pix_format *pix,
 166                     u32 width, u32 height);
 167 void rvin_crop_scale_comp(struct rvin_dev *vin);
 168
 169 #endif