drivers/media/platform/exynos4-is/fimc-lite.h

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics Co., Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef FIMC_LITE_H_
  10 #define FIMC_LITE_H_
  11
  12 #include <linux/sizes.h>
  13 #include <linux/io.h>
  14 #include <linux/irqreturn.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/sched.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/types.h>
  19 #include <linux/videodev2.h>
  20
  21 #include <media/media-entity.h>
  22 #include <media/videobuf2-v4l2.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-mediabus.h>
  26 #include <media/exynos-fimc.h>
  27
  28 #define FIMC_LITE_DRV_NAME      "exynos-fimc-lite"
  29 #define FLITE_CLK_NAME          "flite"
  30 #define FIMC_LITE_MAX_DEVS      3
  31 #define FLITE_REQ_BUFS_MIN      2
  32 #define FLITE_DEFAULT_WIDTH     640
  33 #define FLITE_DEFAULT_HEIGHT    480
  34
  35 /* Bit index definitions for struct fimc_lite::state */
  36 enum {
  37         ST_FLITE_LPM,
  38         ST_FLITE_PENDING,
  39         ST_FLITE_RUN,
  40         ST_FLITE_STREAM,
  41         ST_FLITE_SUSPENDED,
  42         ST_FLITE_OFF,
  43         ST_FLITE_IN_USE,
  44         ST_FLITE_CONFIG,
  45         ST_SENSOR_STREAM,
  46 };
  47
  48 #define FLITE_SD_PAD_SINK       0
  49 #define FLITE_SD_PAD_SOURCE_DMA 1
  50 #define FLITE_SD_PAD_SOURCE_ISP 2
  51 #define FLITE_SD_PADS_NUM       3
  52
  53 /**
  54  * struct flite_drvdata - FIMC-LITE IP variant data structure
  55  * @max_width: maximum camera interface input width in pixels
  56  * @max_height: maximum camera interface input height in pixels
  57  * @out_width_align: minimum output width alignment in pixels
  58  * @win_hor_offs_align: minimum camera interface crop window horizontal
  59  *                      offset alignment in pixels
  60  * @out_hor_offs_align: minimum output DMA compose rectangle horizontal
  61  *                      offset alignment in pixels
  62  * @max_dma_bufs: number of output DMA buffer start address registers
  63  * @num_instances: total number of FIMC-LITE IP instances available
  64  */
  65 struct flite_drvdata {
  66         unsigned short max_width;
  67         unsigned short max_height;
  68         unsigned short out_width_align;
  69         unsigned short win_hor_offs_align;
  70         unsigned short out_hor_offs_align;
  71         unsigned short max_dma_bufs;
  72         unsigned short num_instances;
  73 };
  74
  75 struct fimc_lite_events {
  76         unsigned int data_overflow;
  77 };
  78
  79 #define FLITE_MAX_PLANES        1
  80
  81 /**
  82  * struct flite_frame - source/target frame properties
  83  * @f_width: full pixel width
  84  * @f_height: full pixel height
  85  * @rect: crop/composition rectangle
  86  * @fmt: pointer to pixel format description data structure
  87  */
  88 struct flite_frame {
  89         u16 f_width;
  90         u16 f_height;
  91         struct v4l2_rect rect;
  92         const struct fimc_fmt *fmt;
  93 };
  94
  95 /**
  96  * struct flite_buffer - video buffer structure
  97  * @vb:    vb2 buffer
  98  * @list:  list head for the buffers queue
  99  * @paddr: DMA buffer start address
 100  * @index: DMA start address register's index
 101  */
 102 struct flite_buffer {
 103         struct vb2_v4l2_buffer vb;
 104         struct list_head list;
 105         dma_addr_t paddr;
 106         unsigned short index;
 107 };
 108
 109 /**
 110  * struct fimc_lite - fimc lite structure
 111  * @pdev: pointer to FIMC-LITE platform device
 112  * @dd: SoC specific driver data structure
 113  * @ve: exynos video device entity structure
 114  * @v4l2_dev: pointer to top the level v4l2_device
 115  * @fh: v4l2 file handle
 116  * @alloc_ctx: videobuf2 memory allocator context
 117  * @subdev: FIMC-LITE subdev
 118  * @vd_pad: media (sink) pad for the capture video node
 119  * @subdev_pads: the subdev media pads
 120  * @sensor: sensor subdev attached to FIMC-LITE directly or through MIPI-CSIS
 121  * @ctrl_handler: v4l2 control handler
 122  * @test_pattern: test pattern controls
 123  * @index: FIMC-LITE platform device index
 124  * @pipeline: video capture pipeline data structure
 125  * @pipeline_ops: media pipeline ops for the video node driver
 126  * @slock: spinlock protecting this data structure and the hw registers
 127  * @lock: mutex serializing video device and the subdev operations
 128  * @clock: FIMC-LITE gate clock
 129  * @regs: memory mapped io registers
 130  * @irq_queue: interrupt handler waitqueue
 131  * @payload: image size in bytes (w x h x bpp)
 132  * @inp_frame: camera input frame structure
 133  * @out_frame: DMA output frame structure
 134  * @out_path: output data path (DMA or FIFO)
 135  * @source_subdev_grp_id: source subdev group id
 136  * @state: driver state flags
 137  * @pending_buf_q: pending buffers queue head
 138  * @active_buf_q: the queue head of buffers scheduled in hardware
 139  * @vb_queue: vb2 buffers queue
 140  * @buf_index: helps to keep track of the DMA start address register index
 141  * @active_buf_count: number of video buffers scheduled in hardware
 142  * @frame_count: the captured frames counter
 143  * @reqbufs_count: the number of buffers requested with REQBUFS ioctl
 144  */
 145 struct fimc_lite {
 146         struct platform_device  *pdev;
 147         struct flite_drvdata    *dd;
 148         struct exynos_video_entity ve;
 149         struct v4l2_device      *v4l2_dev;
 150         struct v4l2_fh          fh;
 151         struct vb2_alloc_ctx    *alloc_ctx;
 152         struct v4l2_subdev      subdev;
 153         struct media_pad        vd_pad;
 154         struct media_pad        subdev_pads[FLITE_SD_PADS_NUM];
 155         struct v4l2_subdev      *sensor;
 156         struct v4l2_ctrl_handler ctrl_handler;
 157         struct v4l2_ctrl        *test_pattern;
 158         int                     index;
 159
 160         struct mutex            lock;
 161         spinlock_t              slock;
 162
 163         struct clk              *clock;
 164         void __iomem            *regs;
 165         wait_queue_head_t       irq_queue;
 166
 167         unsigned long           payload[FLITE_MAX_PLANES];
 168         struct flite_frame      inp_frame;
 169         struct flite_frame      out_frame;
 170         atomic_t                out_path;
 171         unsigned int            source_subdev_grp_id;
 172
 173         unsigned long           state;
 174         struct list_head        pending_buf_q;
 175         struct list_head        active_buf_q;
 176         struct vb2_queue        vb_queue;
 177         unsigned short          buf_index;
 178         unsigned int            frame_count;
 179         unsigned int            reqbufs_count;
 180
 181         struct fimc_lite_events events;
 182         bool                    streaming;
 183 };
 184
 185 static inline bool fimc_lite_active(struct fimc_lite *fimc)
 186 {
 187         unsigned long flags;
 188         bool ret;
 189
 190         spin_lock_irqsave(&fimc->slock, flags);
 191         ret = fimc->state & (1 << ST_FLITE_RUN) ||
 192                 fimc->state & (1 << ST_FLITE_PENDING);
 193         spin_unlock_irqrestore(&fimc->slock, flags);
 194         return ret;
 195 }
 196
 197 static inline void fimc_lite_active_queue_add(struct fimc_lite *dev,
 198                                          struct flite_buffer *buf)
 199 {
 200         list_add_tail(&buf->list, &dev->active_buf_q);
 201 }
 202
 203 static inline struct flite_buffer *fimc_lite_active_queue_pop(
 204                                         struct fimc_lite *dev)
 205 {
 206         struct flite_buffer *buf = list_entry(dev->active_buf_q.next,
 207                                               struct flite_buffer, list);
 208         list_del(&buf->list);
 209         return buf;
 210 }
 211
 212 static inline void fimc_lite_pending_queue_add(struct fimc_lite *dev,
 213                                         struct flite_buffer *buf)
 214 {
 215         list_add_tail(&buf->list, &dev->pending_buf_q);
 216 }
 217
 218 static inline struct flite_buffer *fimc_lite_pending_queue_pop(
 219                                         struct fimc_lite *dev)
 220 {
 221         struct flite_buffer *buf = list_entry(dev->pending_buf_q.next,
 222                                               struct flite_buffer, list);
 223         list_del(&buf->list);
 224         return buf;
 225 }
 226
 227 #endif /* FIMC_LITE_H_ */