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-core.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-mediabus.h>
  26 #include <media/s5p_fimc.h>
  27
  28 #define FIMC_LITE_DRV_NAME      "exynos-fimc-lite"
  29 #define FLITE_CLK_NAME          "flite"
  30 #define FIMC_LITE_MAX_DEVS      2
  31 #define FLITE_REQ_BUFS_MIN      2
  32
  33 /* Bit index definitions for struct fimc_lite::state */
  34 enum {
  35         ST_FLITE_LPM,
  36         ST_FLITE_PENDING,
  37         ST_FLITE_RUN,
  38         ST_FLITE_STREAM,
  39         ST_FLITE_SUSPENDED,
  40         ST_FLITE_OFF,
  41         ST_FLITE_IN_USE,
  42         ST_FLITE_CONFIG,
  43         ST_SENSOR_STREAM,
  44 };
  45
  46 #define FLITE_SD_PAD_SINK       0
  47 #define FLITE_SD_PAD_SOURCE_DMA 1
  48 #define FLITE_SD_PAD_SOURCE_ISP 2
  49 #define FLITE_SD_PADS_NUM       3
  50
  51 struct flite_drvdata {
  52         unsigned short max_width;
  53         unsigned short max_height;
  54         unsigned short out_width_align;
  55         unsigned short win_hor_offs_align;
  56         unsigned short out_hor_offs_align;
  57 };
  58
  59 #define fimc_lite_get_drvdata(_pdev) \
  60         ((struct flite_drvdata *) platform_get_device_id(_pdev)->driver_data)
  61
  62 struct fimc_lite_events {
  63         unsigned int data_overflow;
  64 };
  65
  66 #define FLITE_MAX_PLANES        1
  67
  68 /**
  69  * struct flite_frame - source/target frame properties
  70  * @f_width: full pixel width
  71  * @f_height: full pixel height
  72  * @rect: crop/composition rectangle
  73  * @fmt: pointer to pixel format description data structure
  74  */
  75 struct flite_frame {
  76         u16 f_width;
  77         u16 f_height;
  78         struct v4l2_rect rect;
  79         const struct fimc_fmt *fmt;
  80 };
  81
  82 /**
  83  * struct flite_buffer - video buffer structure
  84  * @vb:    vb2 buffer
  85  * @list:  list head for the buffers queue
  86  * @paddr: precalculated physical address
  87  */
  88 struct flite_buffer {
  89         struct vb2_buffer vb;
  90         struct list_head list;
  91         dma_addr_t paddr;
  92 };
  93
  94 /**
  95  * struct fimc_lite - fimc lite structure
  96  * @pdev: pointer to FIMC-LITE platform device
  97  * @dd: SoC specific driver data structure
  98  * @v4l2_dev: pointer to top the level v4l2_device
  99  * @vfd: video device node
 100  * @fh: v4l2 file handle
 101  * @alloc_ctx: videobuf2 memory allocator context
 102  * @subdev: FIMC-LITE subdev
 103  * @vd_pad: media (sink) pad for the capture video node
 104  * @subdev_pads: the subdev media pads
 105  * @sensor: sensor subdev attached to FIMC-LITE directly or through MIPI-CSIS
 106  * @ctrl_handler: v4l2 control handler
 107  * @test_pattern: test pattern controls
 108  * @index: FIMC-LITE platform device index
 109  * @pipeline: video capture pipeline data structure
 110  * @pipeline_ops: media pipeline ops for the video node driver
 111  * @slock: spinlock protecting this data structure and the hw registers
 112  * @lock: mutex serializing video device and the subdev operations
 113  * @clock: FIMC-LITE gate clock
 114  * @regs: memory mapped io registers
 115  * @irq_queue: interrupt handler waitqueue
 116  * @payload: image size in bytes (w x h x bpp)
 117  * @inp_frame: camera input frame structure
 118  * @out_frame: DMA output frame structure
 119  * @out_path: output data path (DMA or FIFO)
 120  * @source_subdev_grp_id: source subdev group id
 121  * @state: driver state flags
 122  * @pending_buf_q: pending buffers queue head
 123  * @active_buf_q: the queue head of buffers scheduled in hardware
 124  * @vb_queue: vb2 buffers queue
 125  * @active_buf_count: number of video buffers scheduled in hardware
 126  * @frame_count: the captured frames counter
 127  * @reqbufs_count: the number of buffers requested with REQBUFS ioctl
 128  * @ref_count: driver's private reference counter
 129  */
 130 struct fimc_lite {
 131         struct platform_device  *pdev;
 132         struct flite_drvdata    *dd;
 133         struct v4l2_device      *v4l2_dev;
 134         struct video_device     vfd;
 135         struct v4l2_fh          fh;
 136         struct vb2_alloc_ctx    *alloc_ctx;
 137         struct v4l2_subdev      subdev;
 138         struct media_pad        vd_pad;
 139         struct media_pad        subdev_pads[FLITE_SD_PADS_NUM];
 140         struct v4l2_subdev      *sensor;
 141         struct v4l2_ctrl_handler ctrl_handler;
 142         struct v4l2_ctrl        *test_pattern;
 143         int                     index;
 144         struct fimc_pipeline    pipeline;
 145         const struct fimc_pipeline_ops *pipeline_ops;
 146
 147         struct mutex            lock;
 148         spinlock_t              slock;
 149
 150         struct clk              *clock;
 151         void __iomem            *regs;
 152         wait_queue_head_t       irq_queue;
 153
 154         unsigned long           payload[FLITE_MAX_PLANES];
 155         struct flite_frame      inp_frame;
 156         struct flite_frame      out_frame;
 157         atomic_t                out_path;
 158         unsigned int            source_subdev_grp_id;
 159
 160         unsigned long           state;
 161         struct list_head        pending_buf_q;
 162         struct list_head        active_buf_q;
 163         struct vb2_queue        vb_queue;
 164         unsigned int            frame_count;
 165         unsigned int            reqbufs_count;
 166         int                     ref_count;
 167
 168         struct fimc_lite_events events;
 169         bool                    streaming;
 170 };
 171
 172 static inline bool fimc_lite_active(struct fimc_lite *fimc)
 173 {
 174         unsigned long flags;
 175         bool ret;
 176
 177         spin_lock_irqsave(&fimc->slock, flags);
 178         ret = fimc->state & (1 << ST_FLITE_RUN) ||
 179                 fimc->state & (1 << ST_FLITE_PENDING);
 180         spin_unlock_irqrestore(&fimc->slock, flags);
 181         return ret;
 182 }
 183
 184 static inline void fimc_lite_active_queue_add(struct fimc_lite *dev,
 185                                          struct flite_buffer *buf)
 186 {
 187         list_add_tail(&buf->list, &dev->active_buf_q);
 188 }
 189
 190 static inline struct flite_buffer *fimc_lite_active_queue_pop(
 191                                         struct fimc_lite *dev)
 192 {
 193         struct flite_buffer *buf = list_entry(dev->active_buf_q.next,
 194                                               struct flite_buffer, list);
 195         list_del(&buf->list);
 196         return buf;
 197 }
 198
 199 static inline void fimc_lite_pending_queue_add(struct fimc_lite *dev,
 200                                         struct flite_buffer *buf)
 201 {
 202         list_add_tail(&buf->list, &dev->pending_buf_q);
 203 }
 204
 205 static inline struct flite_buffer *fimc_lite_pending_queue_pop(
 206                                         struct fimc_lite *dev)
 207 {
 208         struct flite_buffer *buf = list_entry(dev->pending_buf_q.next,
 209                                               struct flite_buffer, list);
 210         list_del(&buf->list);
 211         return buf;
 212 }
 213
 214 #endif /* FIMC_LITE_H_ */