drivers/media/platform/s3c-camif/camif-core.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
   4  *
   5  * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
   6  * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
   7 */
   8
   9 #ifndef CAMIF_CORE_H_
  10 #define CAMIF_CORE_H_
  11
  12 #include <linux/io.h>
  13 #include <linux/irq.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/sched.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/types.h>
  18 #include <linux/videodev2.h>
  19
  20 #include <media/media-entity.h>
  21 #include <media/v4l2-ctrls.h>
  22 #include <media/v4l2-dev.h>
  23 #include <media/v4l2-device.h>
  24 #include <media/v4l2-mediabus.h>
  25 #include <media/videobuf2-v4l2.h>
  26 #include <media/drv-intf/s3c_camif.h>
  27
  28 #define S3C_CAMIF_DRIVER_NAME   "s3c-camif"
  29 #define CAMIF_REQ_BUFS_MIN      3
  30 #define CAMIF_MAX_OUT_BUFS      4
  31 #define CAMIF_MAX_PIX_WIDTH     4096
  32 #define CAMIF_MAX_PIX_HEIGHT    4096
  33 #define SCALER_MAX_RATIO        64
  34 #define CAMIF_DEF_WIDTH         640
  35 #define CAMIF_DEF_HEIGHT        480
  36 #define CAMIF_STOP_TIMEOUT      1500 /* ms */
  37
  38 #define S3C244X_CAMIF_IP_REV    0x20 /* 2.0 */
  39 #define S3C2450_CAMIF_IP_REV    0x30 /* 3.0 - not implemented, not tested */
  40 #define S3C6400_CAMIF_IP_REV    0x31 /* 3.1 - not implemented, not tested */
  41 #define S3C6410_CAMIF_IP_REV    0x32 /* 3.2 */
  42
  43 /* struct camif_vp::state */
  44
  45 #define ST_VP_PENDING           (1 << 0)
  46 #define ST_VP_RUNNING           (1 << 1)
  47 #define ST_VP_STREAMING         (1 << 2)
  48 #define ST_VP_SENSOR_STREAMING  (1 << 3)
  49
  50 #define ST_VP_ABORTING          (1 << 4)
  51 #define ST_VP_OFF               (1 << 5)
  52 #define ST_VP_LASTIRQ           (1 << 6)
  53
  54 #define ST_VP_CONFIG            (1 << 8)
  55
  56 #define CAMIF_SD_PAD_SINK       0
  57 #define CAMIF_SD_PAD_SOURCE_C   1
  58 #define CAMIF_SD_PAD_SOURCE_P   2
  59 #define CAMIF_SD_PADS_NUM       3
  60
  61 enum img_fmt {
  62         IMG_FMT_RGB565 = 0x0010,
  63         IMG_FMT_RGB666,
  64         IMG_FMT_XRGB8888,
  65         IMG_FMT_YCBCR420 = 0x0020,
  66         IMG_FMT_YCRCB420,
  67         IMG_FMT_YCBCR422P,
  68         IMG_FMT_YCBYCR422 = 0x0040,
  69         IMG_FMT_YCRYCB422,
  70         IMG_FMT_CBYCRY422,
  71         IMG_FMT_CRYCBY422,
  72 };
  73
  74 #define img_fmt_is_rgb(x) ((x) & 0x10)
  75 #define img_fmt_is_ycbcr(x) ((x) & 0x60)
  76
  77 /* Possible values for struct camif_fmt::flags */
  78 #define FMT_FL_S3C24XX_CODEC    (1 << 0)
  79 #define FMT_FL_S3C24XX_PREVIEW  (1 << 1)
  80 #define FMT_FL_S3C64XX          (1 << 2)
  81
  82 /**
  83  * struct camif_fmt - pixel format description
  84  * @fourcc:    fourcc code for this format, 0 if not applicable
  85  * @color:     a corresponding enum img_fmt
  86  * @colplanes: number of physically contiguous data planes
  87  * @flags:     indicate for which SoCs revisions this format is valid
  88  * @depth:     bits per pixel (total)
  89  * @ybpp:      number of luminance bytes per pixel
  90  */
  91 struct camif_fmt {
  92         u32 fourcc;
  93         u32 color;
  94         u16 colplanes;
  95         u16 flags;
  96         u8 depth;
  97         u8 ybpp;
  98 };
  99
 100 /**
 101  * struct camif_dma_offset - pixel offset information for DMA
 102  * @initial: offset (in pixels) to first pixel
 103  * @line: offset (in pixels) from end of line to start of next line
 104  */
 105 struct camif_dma_offset {
 106         int     initial;
 107         int     line;
 108 };
 109
 110 /**
 111  * struct camif_frame - source/target frame properties
 112  * @f_width: full pixel width
 113  * @f_height: full pixel height
 114  * @rect: crop/composition rectangle
 115  * @dma_offset: DMA offset configuration
 116  */
 117 struct camif_frame {
 118         u16 f_width;
 119         u16 f_height;
 120         struct v4l2_rect rect;
 121         struct camif_dma_offset dma_offset;
 122 };
 123
 124 /* CAMIF clocks enumeration */
 125 enum {
 126         CLK_GATE,
 127         CLK_CAM,
 128         CLK_MAX_NUM,
 129 };
 130
 131 struct vp_pix_limits {
 132         u16 max_out_width;
 133         u16 max_sc_out_width;
 134         u16 out_width_align;
 135         u16 max_height;
 136         u8 min_out_width;
 137         u16 out_hor_offset_align;
 138 };
 139
 140 struct camif_pix_limits {
 141         u16 win_hor_offset_align;
 142 };
 143
 144 /**
 145  * struct s3c_camif_variant - CAMIF variant structure
 146  * @vp_pix_limits:    pixel limits for the codec and preview paths
 147  * @camif_pix_limits: pixel limits for the camera input interface
 148  * @ip_revision:      the CAMIF IP revision: 0x20 for s3c244x, 0x32 for s3c6410
 149  */
 150 struct s3c_camif_variant {
 151         struct vp_pix_limits vp_pix_limits[2];
 152         struct camif_pix_limits pix_limits;
 153         u8 ip_revision;
 154         u8 has_img_effect;
 155         unsigned int vp_offset;
 156 };
 157
 158 struct s3c_camif_drvdata {
 159         const struct s3c_camif_variant *variant;
 160         unsigned long bus_clk_freq;
 161 };
 162
 163 struct camif_scaler {
 164         u8 scaleup_h;
 165         u8 scaleup_v;
 166         u8 copy;
 167         u8 enable;
 168         u32 h_shift;
 169         u32 v_shift;
 170         u32 pre_h_ratio;
 171         u32 pre_v_ratio;
 172         u32 pre_dst_width;
 173         u32 pre_dst_height;
 174         u32 main_h_ratio;
 175         u32 main_v_ratio;
 176 };
 177
 178 struct camif_dev;
 179
 180 /**
 181  * struct camif_vp - CAMIF data processing path structure (codec/preview)
 182  * @irq_queue:      interrupt handling waitqueue
 183  * @irq:            interrupt number for this data path
 184  * @camif:          pointer to the camif structure
 185  * @pad:            media pad for the video node
 186  * @vdev            video device
 187  * @ctrl_handler:   video node controls handler
 188  * @owner:          file handle that own the streaming
 189  * @pending_buf_q:  pending (empty) buffers queue head
 190  * @active_buf_q:   active (being written) buffers queue head
 191  * @active_buffers: counter of buffer set up at the DMA engine
 192  * @buf_index:      identifier of a last empty buffer set up in H/W
 193  * @frame_sequence: image frame sequence counter
 194  * @reqbufs_count:  the number of buffers requested
 195  * @scaler:         the scaler structure
 196  * @out_fmt:        pixel format at this video path output
 197  * @payload:        the output data frame payload size
 198  * @out_frame:      the output pixel resolution
 199  * @state:          the video path's state
 200  * @fmt_flags:      flags determining supported pixel formats
 201  * @id:             CAMIF id, 0 - codec, 1 - preview
 202  * @rotation:       current image rotation value
 203  * @hflip:          apply horizontal flip if set
 204  * @vflip:          apply vertical flip if set
 205  */
 206 struct camif_vp {
 207         wait_queue_head_t       irq_queue;
 208         int                     irq;
 209         struct camif_dev        *camif;
 210         struct media_pad        pad;
 211         struct video_device     vdev;
 212         struct v4l2_ctrl_handler ctrl_handler;
 213         struct v4l2_fh          *owner;
 214         struct vb2_queue        vb_queue;
 215         struct list_head        pending_buf_q;
 216         struct list_head        active_buf_q;
 217         unsigned int            active_buffers;
 218         unsigned int            buf_index;
 219         unsigned int            frame_sequence;
 220         unsigned int            reqbufs_count;
 221         struct camif_scaler     scaler;
 222         const struct camif_fmt  *out_fmt;
 223         unsigned int            payload;
 224         struct camif_frame      out_frame;
 225         unsigned int            state;
 226         u16                     fmt_flags;
 227         u8                      id;
 228         u16                     rotation;
 229         u8                      hflip;
 230         u8                      vflip;
 231         unsigned int            offset;
 232 };
 233
 234 /* Video processing path enumeration */
 235 #define VP_CODEC        0
 236 #define VP_PREVIEW      1
 237 #define CAMIF_VP_NUM    2
 238
 239 /**
 240  * struct camif_dev - the CAMIF driver private data structure
 241  * @media_dev:    top-level media device structure
 242  * @v4l2_dev:     root v4l2_device
 243  * @subdev:       camera interface ("catchcam") subdev
 244  * @mbus_fmt:     camera input media bus format
 245  * @camif_crop:   camera input interface crop rectangle
 246  * @pads:         the camif subdev's media pads
 247  * @stream_count: the camera interface streaming reference counter
 248  * @sensor:       image sensor data structure
 249  * @m_pipeline:   video entity pipeline description
 250  * @ctrl_handler: v4l2 control handler (owned by @subdev)
 251  * @test_pattern: test pattern controls
 252  * @vp:           video path (DMA) description (codec/preview)
 253  * @variant:      variant information for this device
 254  * @dev:          pointer to the CAMIF device struct
 255  * @pdata:        a copy of the driver's platform data
 256  * @clock:        clocks required for the CAMIF operation
 257  * @lock:         mutex protecting this data structure
 258  * @slock:        spinlock protecting CAMIF registers
 259  * @io_base:      start address of the mmapped CAMIF registers
 260  */
 261 struct camif_dev {
 262         struct media_device             media_dev;
 263         struct v4l2_device              v4l2_dev;
 264         struct v4l2_subdev              subdev;
 265         struct v4l2_mbus_framefmt       mbus_fmt;
 266         struct v4l2_rect                camif_crop;
 267         struct media_pad                pads[CAMIF_SD_PADS_NUM];
 268         int                             stream_count;
 269
 270         struct cam_sensor {
 271                 struct v4l2_subdev      *sd;
 272                 short                   power_count;
 273                 short                   stream_count;
 274         } sensor;
 275         struct media_pipeline           *m_pipeline;
 276
 277         struct v4l2_ctrl_handler        ctrl_handler;
 278         struct v4l2_ctrl                *ctrl_test_pattern;
 279         struct {
 280                 struct v4l2_ctrl        *ctrl_colorfx;
 281                 struct v4l2_ctrl        *ctrl_colorfx_cbcr;
 282         };
 283         u8                              test_pattern;
 284         u8                              colorfx;
 285         u8                              colorfx_cb;
 286         u8                              colorfx_cr;
 287
 288         struct camif_vp                 vp[CAMIF_VP_NUM];
 289
 290         const struct s3c_camif_variant  *variant;
 291         struct device                   *dev;
 292         struct s3c_camif_plat_data      pdata;
 293         struct clk                      *clock[CLK_MAX_NUM];
 294         struct mutex                    lock;
 295         spinlock_t                      slock;
 296         void __iomem                    *io_base;
 297 };
 298
 299 /**
 300  * struct camif_addr - Y/Cb/Cr DMA start address structure
 301  * @y:   luminance plane dma address
 302  * @cb:  Cb plane dma address
 303  * @cr:  Cr plane dma address
 304  */
 305 struct camif_addr {
 306         dma_addr_t y;
 307         dma_addr_t cb;
 308         dma_addr_t cr;
 309 };
 310
 311 /**
 312  * struct camif_buffer - the camif video buffer structure
 313  * @vb:    vb2 buffer
 314  * @list:  list head for the buffers queue
 315  * @paddr: DMA start addresses
 316  * @index: an identifier of this buffer at the DMA engine
 317  */
 318 struct camif_buffer {
 319         struct vb2_v4l2_buffer vb;
 320         struct list_head list;
 321         struct camif_addr paddr;
 322         unsigned int index;
 323 };
 324
 325 const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
 326               const u32 *pixelformat, int index);
 327 int s3c_camif_register_video_node(struct camif_dev *camif, int idx);
 328 void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx);
 329 irqreturn_t s3c_camif_irq_handler(int irq, void *priv);
 330 int s3c_camif_create_subdev(struct camif_dev *camif);
 331 void s3c_camif_unregister_subdev(struct camif_dev *camif);
 332 int s3c_camif_set_defaults(struct camif_dev *camif);
 333 int s3c_camif_get_scaler_config(struct camif_vp *vp,
 334                                 struct camif_scaler *scaler);
 335
 336 static inline void camif_active_queue_add(struct camif_vp *vp,
 337                                           struct camif_buffer *buf)
 338 {
 339         list_add_tail(&buf->list, &vp->active_buf_q);
 340         vp->active_buffers++;
 341 }
 342
 343 static inline struct camif_buffer *camif_active_queue_pop(
 344                                         struct camif_vp *vp)
 345 {
 346         struct camif_buffer *buf = list_first_entry(&vp->active_buf_q,
 347                                               struct camif_buffer, list);
 348         list_del(&buf->list);
 349         vp->active_buffers--;
 350         return buf;
 351 }
 352
 353 static inline struct camif_buffer *camif_active_queue_peek(
 354                            struct camif_vp *vp, int index)
 355 {
 356         struct camif_buffer *tmp, *buf;
 357
 358         if (WARN_ON(list_empty(&vp->active_buf_q)))
 359                 return NULL;
 360
 361         list_for_each_entry_safe(buf, tmp, &vp->active_buf_q, list) {
 362                 if (buf->index == index) {
 363                         list_del(&buf->list);
 364                         vp->active_buffers--;
 365                         return buf;
 366                 }
 367         }
 368
 369         return NULL;
 370 }
 371
 372 static inline void camif_pending_queue_add(struct camif_vp *vp,
 373                                            struct camif_buffer *buf)
 374 {
 375         list_add_tail(&buf->list, &vp->pending_buf_q);
 376 }
 377
 378 static inline struct camif_buffer *camif_pending_queue_pop(
 379                                         struct camif_vp *vp)
 380 {
 381         struct camif_buffer *buf = list_first_entry(&vp->pending_buf_q,
 382                                               struct camif_buffer, list);
 383         list_del(&buf->list);
 384         return buf;
 385 }
 386
 387 #endif /* CAMIF_CORE_H_ */