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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 Samsung Electronics Co., Ltd.
   4  */
   5
   6 #ifndef FIMC_LITE_H_
   7 #define FIMC_LITE_H_
   8
   9 #include <linux/sizes.h>
  10 #include <linux/io.h>
  11 #include <linux/irqreturn.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/sched.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/types.h>
  16 #include <linux/videodev2.h>
  17
  18 #include <media/media-entity.h>
  19 #include <media/videobuf2-v4l2.h>
  20 #include <media/v4l2-ctrls.h>
  21 #include <media/v4l2-device.h>
  22 #include <media/v4l2-mediabus.h>
  23 #include <media/drv-intf/exynos-fimc.h>
  24
  25 #define FIMC_LITE_DRV_NAME      "exynos-fimc-lite"
  26 #define FLITE_CLK_NAME          "flite"
  27 #define FIMC_LITE_MAX_DEVS      3
  28 #define FLITE_REQ_BUFS_MIN      2
  29 #define FLITE_DEFAULT_WIDTH     640
  30 #define FLITE_DEFAULT_HEIGHT    480
  31
  32 /* Bit index definitions for struct fimc_lite::state */
  33 enum {
  34         ST_FLITE_LPM,
  35         ST_FLITE_PENDING,
  36         ST_FLITE_RUN,
  37         ST_FLITE_STREAM,
  38         ST_FLITE_SUSPENDED,
  39         ST_FLITE_OFF,
  40         ST_FLITE_IN_USE,
  41         ST_FLITE_CONFIG,
  42         ST_SENSOR_STREAM,
  43 };
  44
  45 #define FLITE_SD_PAD_SINK       0
  46 #define FLITE_SD_PAD_SOURCE_DMA 1
  47 #define FLITE_SD_PAD_SOURCE_ISP 2
  48 #define FLITE_SD_PADS_NUM       3
  49
  50 /**
  51  * struct flite_drvdata - FIMC-LITE IP variant data structure
  52  * @max_width: maximum camera interface input width in pixels
  53  * @max_height: maximum camera interface input height in pixels
  54  * @out_width_align: minimum output width alignment in pixels
  55  * @win_hor_offs_align: minimum camera interface crop window horizontal
  56  *                      offset alignment in pixels
  57  * @out_hor_offs_align: minimum output DMA compose rectangle horizontal
  58  *                      offset alignment in pixels
  59  * @max_dma_bufs: number of output DMA buffer start address registers
  60  * @num_instances: total number of FIMC-LITE IP instances available
  61  */
  62 struct flite_drvdata {
  63         unsigned short max_width;
  64         unsigned short max_height;
  65         unsigned short out_width_align;
  66         unsigned short win_hor_offs_align;
  67         unsigned short out_hor_offs_align;
  68         unsigned short max_dma_bufs;
  69         unsigned short num_instances;
  70 };
  71
  72 struct fimc_lite_events {
  73         unsigned int data_overflow;
  74 };
  75
  76 #define FLITE_MAX_PLANES        1
  77
  78 /**
  79  * struct flite_frame - source/target frame properties
  80  * @f_width: full pixel width
  81  * @f_height: full pixel height
  82  * @rect: crop/composition rectangle
  83  * @fmt: pointer to pixel format description data structure
  84  */
  85 struct flite_frame {
  86         u16 f_width;
  87         u16 f_height;
  88         struct v4l2_rect rect;
  89         const struct fimc_fmt *fmt;
  90 };
  91
  92 /**
  93  * struct flite_buffer - video buffer structure
  94  * @vb:    vb2 buffer
  95  * @list:  list head for the buffers queue
  96  * @addr: DMA buffer start address
  97  * @index: DMA start address register's index
  98  */
  99 struct flite_buffer {
 100         struct vb2_v4l2_buffer vb;
 101         struct list_head list;
 102         dma_addr_t addr;
 103         unsigned short index;
 104 };
 105
 106 /**
 107  * struct fimc_lite - fimc lite structure
 108  * @pdev: pointer to FIMC-LITE platform device
 109  * @dd: SoC specific driver data structure
 110  * @ve: exynos video device entity structure
 111  * @v4l2_dev: pointer to top the level v4l2_device
 112  * @fh: v4l2 file handle
 113  * @subdev: FIMC-LITE subdev
 114  * @vd_pad: media (sink) pad for the capture video node
 115  * @subdev_pads: the subdev media pads
 116  * @sensor: sensor subdev attached to FIMC-LITE directly or through MIPI-CSIS
 117  * @ctrl_handler: v4l2 control handler
 118  * @test_pattern: test pattern controls
 119  * @index: FIMC-LITE platform device index
 120  * @slock: spinlock protecting this data structure and the hw registers
 121  * @lock: mutex serializing video device and the subdev operations
 122  * @clock: FIMC-LITE gate clock
 123  * @regs: memory mapped io registers
 124  * @irq_queue: interrupt handler waitqueue
 125  * @payload: image size in bytes (w x h x bpp)
 126  * @inp_frame: camera input frame structure
 127  * @out_frame: DMA output frame structure
 128  * @out_path: output data path (DMA or FIFO)
 129  * @source_subdev_grp_id: source subdev group id
 130  * @state: driver state flags
 131  * @pending_buf_q: pending buffers queue head
 132  * @active_buf_q: the queue head of buffers scheduled in hardware
 133  * @vb_queue: vb2 buffers queue
 134  * @buf_index: helps to keep track of the DMA start address register index
 135  * @frame_count: the captured frames counter
 136  * @reqbufs_count: the number of buffers requested with REQBUFS ioctl
 137  * @events: event info
 138  * @streaming: is streaming in progress?
 139  */
 140 struct fimc_lite {
 141         struct platform_device  *pdev;
 142         struct flite_drvdata    *dd;
 143         struct exynos_video_entity ve;
 144         struct v4l2_device      *v4l2_dev;
 145         struct v4l2_fh          fh;
 146         struct v4l2_subdev      subdev;
 147         struct media_pad        vd_pad;
 148         struct media_pad        subdev_pads[FLITE_SD_PADS_NUM];
 149         struct v4l2_subdev      *sensor;
 150         struct v4l2_ctrl_handler ctrl_handler;
 151         struct v4l2_ctrl        *test_pattern;
 152         int                     index;
 153
 154         struct mutex            lock;
 155         spinlock_t              slock;
 156
 157         struct clk              *clock;
 158         void __iomem            *regs;
 159         wait_queue_head_t       irq_queue;
 160
 161         unsigned long           payload[FLITE_MAX_PLANES];
 162         struct flite_frame      inp_frame;
 163         struct flite_frame      out_frame;
 164         atomic_t                out_path;
 165         unsigned int            source_subdev_grp_id;
 166
 167         unsigned long           state;
 168         struct list_head        pending_buf_q;
 169         struct list_head        active_buf_q;
 170         struct vb2_queue        vb_queue;
 171         unsigned short          buf_index;
 172         unsigned int            frame_count;
 173         unsigned int            reqbufs_count;
 174
 175         struct fimc_lite_events events;
 176         bool                    streaming;
 177 };
 178
 179 static inline bool fimc_lite_active(struct fimc_lite *fimc)
 180 {
 181         unsigned long flags;
 182         bool ret;
 183
 184         spin_lock_irqsave(&fimc->slock, flags);
 185         ret = fimc->state & (1 << ST_FLITE_RUN) ||
 186                 fimc->state & (1 << ST_FLITE_PENDING);
 187         spin_unlock_irqrestore(&fimc->slock, flags);
 188         return ret;
 189 }
 190
 191 static inline void fimc_lite_active_queue_add(struct fimc_lite *dev,
 192                                          struct flite_buffer *buf)
 193 {
 194         list_add_tail(&buf->list, &dev->active_buf_q);
 195 }
 196
 197 static inline struct flite_buffer *fimc_lite_active_queue_pop(
 198                                         struct fimc_lite *dev)
 199 {
 200         struct flite_buffer *buf = list_entry(dev->active_buf_q.next,
 201                                               struct flite_buffer, list);
 202         list_del(&buf->list);
 203         return buf;
 204 }
 205
 206 static inline void fimc_lite_pending_queue_add(struct fimc_lite *dev,
 207                                         struct flite_buffer *buf)
 208 {
 209         list_add_tail(&buf->list, &dev->pending_buf_q);
 210 }
 211
 212 static inline struct flite_buffer *fimc_lite_pending_queue_pop(
 213                                         struct fimc_lite *dev)
 214 {
 215         struct flite_buffer *buf = list_entry(dev->pending_buf_q.next,
 216                                               struct flite_buffer, list);
 217         list_del(&buf->list);
 218         return buf;
 219 }
 220
 221 #endif /* FIMC_LITE_H_ */