drivers/media/platform/exynos-gsc/gsc-core.h

   1 /*
   2  * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * header file for Samsung EXYNOS5 SoC series G-Scaler driver
   6
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef GSC_CORE_H_
  13 #define GSC_CORE_H_
  14
  15 #include <linux/delay.h>
  16 #include <linux/sched.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/types.h>
  19 #include <linux/videodev2.h>
  20 #include <linux/io.h>
  21 #include <linux/pm_runtime.h>
  22 #include <media/videobuf2-core.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-mem2mem.h>
  26 #include <media/v4l2-mediabus.h>
  27 #include <media/videobuf2-dma-contig.h>
  28
  29 #include "gsc-regs.h"
  30
  31 #define CONFIG_VB2_GSC_DMA_CONTIG       1
  32 #define GSC_MODULE_NAME                 "exynos-gsc"
  33
  34 #define GSC_SHUTDOWN_TIMEOUT            ((100*HZ)/1000)
  35 #define GSC_MAX_DEVS                    4
  36 #define GSC_M2M_BUF_NUM                 0
  37 #define GSC_MAX_CTRL_NUM                10
  38 #define GSC_SC_ALIGN_4                  4
  39 #define GSC_SC_ALIGN_2                  2
  40 #define DEFAULT_CSC_EQ                  1
  41 #define DEFAULT_CSC_RANGE               1
  42
  43 #define GSC_PARAMS                      (1 << 0)
  44 #define GSC_SRC_FMT                     (1 << 1)
  45 #define GSC_DST_FMT                     (1 << 2)
  46 #define GSC_CTX_M2M                     (1 << 3)
  47 #define GSC_CTX_STOP_REQ                (1 << 6)
  48
  49 enum gsc_dev_flags {
  50         /* for global */
  51         ST_SUSPEND,
  52
  53         /* for m2m node */
  54         ST_M2M_OPEN,
  55         ST_M2M_RUN,
  56         ST_M2M_PEND,
  57         ST_M2M_SUSPENDED,
  58         ST_M2M_SUSPENDING,
  59 };
  60
  61 enum gsc_irq {
  62         GSC_IRQ_DONE,
  63         GSC_IRQ_OVERRUN
  64 };
  65
  66 /**
  67  * enum gsc_datapath - the path of data used for G-Scaler
  68  * @GSC_CAMERA: from camera
  69  * @GSC_DMA: from/to DMA
  70  * @GSC_LOCAL: to local path
  71  * @GSC_WRITEBACK: from FIMD
  72  */
  73 enum gsc_datapath {
  74         GSC_CAMERA = 0x1,
  75         GSC_DMA,
  76         GSC_MIXER,
  77         GSC_FIMD,
  78         GSC_WRITEBACK,
  79 };
  80
  81 enum gsc_color_fmt {
  82         GSC_RGB = 0x1,
  83         GSC_YUV420 = 0x2,
  84         GSC_YUV422 = 0x4,
  85         GSC_YUV444 = 0x8,
  86 };
  87
  88 enum gsc_yuv_fmt {
  89         GSC_LSB_Y = 0x10,
  90         GSC_LSB_C,
  91         GSC_CBCR = 0x20,
  92         GSC_CRCB,
  93 };
  94
  95 #define fh_to_ctx(__fh) container_of(__fh, struct gsc_ctx, fh)
  96 #define is_rgb(x) (!!((x) & 0x1))
  97 #define is_yuv420(x) (!!((x) & 0x2))
  98 #define is_yuv422(x) (!!((x) & 0x4))
  99
 100 #define gsc_m2m_active(dev)     test_bit(ST_M2M_RUN, &(dev)->state)
 101 #define gsc_m2m_pending(dev)    test_bit(ST_M2M_PEND, &(dev)->state)
 102 #define gsc_m2m_opened(dev)     test_bit(ST_M2M_OPEN, &(dev)->state)
 103
 104 #define ctrl_to_ctx(__ctrl) \
 105         container_of((__ctrl)->handler, struct gsc_ctx, ctrl_handler)
 106 /**
 107  * struct gsc_fmt - the driver's internal color format data
 108  * @mbus_code: Media Bus pixel code, -1 if not applicable
 109  * @name: format description
 110  * @pixelformat: the fourcc code for this format, 0 if not applicable
 111  * @yorder: Y/C order
 112  * @corder: Chrominance order control
 113  * @num_planes: number of physically non-contiguous data planes
 114  * @nr_comp: number of physically contiguous data planes
 115  * @depth: per plane driver's private 'number of bits per pixel'
 116  * @flags: flags indicating which operation mode format applies to
 117  */
 118 struct gsc_fmt {
 119         enum v4l2_mbus_pixelcode mbus_code;
 120         char    *name;
 121         u32     pixelformat;
 122         u32     color;
 123         u32     yorder;
 124         u32     corder;
 125         u16     num_planes;
 126         u16     num_comp;
 127         u8      depth[VIDEO_MAX_PLANES];
 128         u32     flags;
 129 };
 130
 131 /**
 132  * struct gsc_input_buf - the driver's video buffer
 133  * @vb: videobuf2 buffer
 134  * @list : linked list structure for buffer queue
 135  * @idx : index of G-Scaler input buffer
 136  */
 137 struct gsc_input_buf {
 138         struct vb2_buffer       vb;
 139         struct list_head        list;
 140         int                     idx;
 141 };
 142
 143 /**
 144  * struct gsc_addr - the G-Scaler physical address set
 145  * @y:   luminance plane address
 146  * @cb:  Cb plane address
 147  * @cr:  Cr plane address
 148  */
 149 struct gsc_addr {
 150         dma_addr_t y;
 151         dma_addr_t cb;
 152         dma_addr_t cr;
 153 };
 154
 155 /* struct gsc_ctrls - the G-Scaler control set
 156  * @rotate: rotation degree
 157  * @hflip: horizontal flip
 158  * @vflip: vertical flip
 159  * @global_alpha: the alpha value of current frame
 160  */
 161 struct gsc_ctrls {
 162         struct v4l2_ctrl *rotate;
 163         struct v4l2_ctrl *hflip;
 164         struct v4l2_ctrl *vflip;
 165         struct v4l2_ctrl *global_alpha;
 166 };
 167
 168 /**
 169  * struct gsc_scaler - the configuration data for G-Scaler inetrnal scaler
 170  * @pre_shfactor:       pre sclaer shift factor
 171  * @pre_hratio:         horizontal ratio of the prescaler
 172  * @pre_vratio:         vertical ratio of the prescaler
 173  * @main_hratio:        the main scaler's horizontal ratio
 174  * @main_vratio:        the main scaler's vertical ratio
 175  */
 176 struct gsc_scaler {
 177         u32 pre_shfactor;
 178         u32 pre_hratio;
 179         u32 pre_vratio;
 180         u32 main_hratio;
 181         u32 main_vratio;
 182 };
 183
 184 struct gsc_dev;
 185
 186 struct gsc_ctx;
 187
 188 /**
 189  * struct gsc_frame - source/target frame properties
 190  * @f_width:    SRC : SRCIMG_WIDTH, DST : OUTPUTDMA_WHOLE_IMG_WIDTH
 191  * @f_height:   SRC : SRCIMG_HEIGHT, DST : OUTPUTDMA_WHOLE_IMG_HEIGHT
 192  * @crop:       cropped(source)/scaled(destination) size
 193  * @payload:    image size in bytes (w x h x bpp)
 194  * @addr:       image frame buffer physical addresses
 195  * @fmt:        G-Scaler color format pointer
 196  * @colorspace: value indicating v4l2_colorspace
 197  * @alpha:      frame's alpha value
 198  */
 199 struct gsc_frame {
 200         u32 f_width;
 201         u32 f_height;
 202         struct v4l2_rect crop;
 203         unsigned long payload[VIDEO_MAX_PLANES];
 204         struct gsc_addr addr;
 205         const struct gsc_fmt *fmt;
 206         u32 colorspace;
 207         u8 alpha;
 208 };
 209
 210 /**
 211  * struct gsc_m2m_device - v4l2 memory-to-memory device data
 212  * @vfd: the video device node for v4l2 m2m mode
 213  * @m2m_dev: v4l2 memory-to-memory device data
 214  * @ctx: hardware context data
 215  * @refcnt: the reference counter
 216  */
 217 struct gsc_m2m_device {
 218         struct video_device     *vfd;
 219         struct v4l2_m2m_dev     *m2m_dev;
 220         struct gsc_ctx          *ctx;
 221         int                     refcnt;
 222 };
 223
 224 /**
 225  *  struct gsc_pix_max - image pixel size limits in various IP configurations
 226  *
 227  *  @org_scaler_bypass_w: max pixel width when the scaler is disabled
 228  *  @org_scaler_bypass_h: max pixel height when the scaler is disabled
 229  *  @org_scaler_input_w: max pixel width when the scaler is enabled
 230  *  @org_scaler_input_h: max pixel height when the scaler is enabled
 231  *  @real_rot_dis_w: max pixel src cropped height with the rotator is off
 232  *  @real_rot_dis_h: max pixel src croppped width with the rotator is off
 233  *  @real_rot_en_w: max pixel src cropped width with the rotator is on
 234  *  @real_rot_en_h: max pixel src cropped height with the rotator is on
 235  *  @target_rot_dis_w: max pixel dst scaled width with the rotator is off
 236  *  @target_rot_dis_h: max pixel dst scaled height with the rotator is off
 237  *  @target_rot_en_w: max pixel dst scaled width with the rotator is on
 238  *  @target_rot_en_h: max pixel dst scaled height with the rotator is on
 239  */
 240 struct gsc_pix_max {
 241         u16 org_scaler_bypass_w;
 242         u16 org_scaler_bypass_h;
 243         u16 org_scaler_input_w;
 244         u16 org_scaler_input_h;
 245         u16 real_rot_dis_w;
 246         u16 real_rot_dis_h;
 247         u16 real_rot_en_w;
 248         u16 real_rot_en_h;
 249         u16 target_rot_dis_w;
 250         u16 target_rot_dis_h;
 251         u16 target_rot_en_w;
 252         u16 target_rot_en_h;
 253 };
 254
 255 /**
 256  *  struct gsc_pix_min - image pixel size limits in various IP configurations
 257  *
 258  *  @org_w: minimum source pixel width
 259  *  @org_h: minimum source pixel height
 260  *  @real_w: minimum input crop pixel width
 261  *  @real_h: minimum input crop pixel height
 262  *  @target_rot_dis_w: minimum output scaled pixel height when rotator is off
 263  *  @target_rot_dis_h: minimum output scaled pixel height when rotator is off
 264  *  @target_rot_en_w: minimum output scaled pixel height when rotator is on
 265  *  @target_rot_en_h: minimum output scaled pixel height when rotator is on
 266  */
 267 struct gsc_pix_min {
 268         u16 org_w;
 269         u16 org_h;
 270         u16 real_w;
 271         u16 real_h;
 272         u16 target_rot_dis_w;
 273         u16 target_rot_dis_h;
 274         u16 target_rot_en_w;
 275         u16 target_rot_en_h;
 276 };
 277
 278 struct gsc_pix_align {
 279         u16 org_h;
 280         u16 org_w;
 281         u16 offset_h;
 282         u16 real_w;
 283         u16 real_h;
 284         u16 target_w;
 285         u16 target_h;
 286 };
 287
 288 /**
 289  * struct gsc_variant - G-Scaler variant information
 290  */
 291 struct gsc_variant {
 292         struct gsc_pix_max *pix_max;
 293         struct gsc_pix_min *pix_min;
 294         struct gsc_pix_align *pix_align;
 295         u16             in_buf_cnt;
 296         u16             out_buf_cnt;
 297         u16             sc_up_max;
 298         u16             sc_down_max;
 299         u16             poly_sc_down_max;
 300         u16             pre_sc_down_max;
 301         u16             local_sc_down;
 302 };
 303
 304 /**
 305  * struct gsc_driverdata - per device type driver data for init time.
 306  *
 307  * @variant: the variant information for this driver.
 308  * @lclk_frequency: G-Scaler clock frequency
 309  * @num_entities: the number of g-scalers
 310  */
 311 struct gsc_driverdata {
 312         struct gsc_variant *variant[GSC_MAX_DEVS];
 313         unsigned long   lclk_frequency;
 314         int             num_entities;
 315 };
 316
 317 /**
 318  * struct gsc_dev - abstraction for G-Scaler entity
 319  * @slock:      the spinlock protecting this data structure
 320  * @lock:       the mutex protecting this data structure
 321  * @pdev:       pointer to the G-Scaler platform device
 322  * @variant:    the IP variant information
 323  * @id:         G-Scaler device index (0..GSC_MAX_DEVS)
 324  * @clock:      clocks required for G-Scaler operation
 325  * @regs:       the mapped hardware registers
 326  * @irq_queue:  interrupt handler waitqueue
 327  * @m2m:        memory-to-memory V4L2 device information
 328  * @state:      flags used to synchronize m2m and capture mode operation
 329  * @alloc_ctx:  videobuf2 memory allocator context
 330  * @vdev:       video device for G-Scaler instance
 331  */
 332 struct gsc_dev {
 333         spinlock_t                      slock;
 334         struct mutex                    lock;
 335         struct platform_device          *pdev;
 336         struct gsc_variant              *variant;
 337         u16                             id;
 338         struct clk                      *clock;
 339         void __iomem                    *regs;
 340         wait_queue_head_t               irq_queue;
 341         struct gsc_m2m_device           m2m;
 342         struct exynos_platform_gscaler  *pdata;
 343         unsigned long                   state;
 344         struct vb2_alloc_ctx            *alloc_ctx;
 345         struct video_device             vdev;
 346         struct v4l2_device              v4l2_dev;
 347 };
 348
 349 /**
 350  * gsc_ctx - the device context data
 351  * @s_frame:            source frame properties
 352  * @d_frame:            destination frame properties
 353  * @in_path:            input mode (DMA or camera)
 354  * @out_path:           output mode (DMA or FIFO)
 355  * @scaler:             image scaler properties
 356  * @flags:              additional flags for image conversion
 357  * @state:              flags to keep track of user configuration
 358  * @gsc_dev:            the G-Scaler device this context applies to
 359  * @m2m_ctx:            memory-to-memory device context
 360  * @fh:                 v4l2 file handle
 361  * @ctrl_handler:       v4l2 controls handler
 362  * @gsc_ctrls           G-Scaler control set
 363  * @ctrls_rdy:          true if the control handler is initialized
 364  */
 365 struct gsc_ctx {
 366         struct gsc_frame        s_frame;
 367         struct gsc_frame        d_frame;
 368         enum gsc_datapath       in_path;
 369         enum gsc_datapath       out_path;
 370         struct gsc_scaler       scaler;
 371         u32                     flags;
 372         u32                     state;
 373         int                     rotation;
 374         unsigned int            hflip:1;
 375         unsigned int            vflip:1;
 376         struct gsc_dev          *gsc_dev;
 377         struct v4l2_m2m_ctx     *m2m_ctx;
 378         struct v4l2_fh          fh;
 379         struct v4l2_ctrl_handler ctrl_handler;
 380         struct gsc_ctrls        gsc_ctrls;
 381         bool                    ctrls_rdy;
 382 };
 383
 384 void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm);
 385 int gsc_register_m2m_device(struct gsc_dev *gsc);
 386 void gsc_unregister_m2m_device(struct gsc_dev *gsc);
 387 void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state);
 388
 389 u32 get_plane_size(struct gsc_frame *fr, unsigned int plane);
 390 const struct gsc_fmt *get_format(int index);
 391 const struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, u32 index);
 392 int gsc_enum_fmt_mplane(struct v4l2_fmtdesc *f);
 393 int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f);
 394 void gsc_set_frame_size(struct gsc_frame *frame, int width, int height);
 395 int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f);
 396 void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h);
 397 int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr);
 398 int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr);
 399 int gsc_cal_prescaler_ratio(struct gsc_variant *var, u32 src, u32 dst,
 400                                                         u32 *ratio);
 401 void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *sh);
 402 void gsc_check_src_scale_info(struct gsc_variant *var,
 403                                 struct gsc_frame *s_frame,
 404                                 u32 *wratio, u32 tx, u32 ty, u32 *hratio);
 405 int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
 406                            int dh, int rot, int out_path);
 407 int gsc_set_scaler_info(struct gsc_ctx *ctx);
 408 int gsc_ctrls_create(struct gsc_ctx *ctx);
 409 void gsc_ctrls_delete(struct gsc_ctx *ctx);
 410 int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
 411                      struct gsc_frame *frame, struct gsc_addr *addr);
 412
 413 static inline void gsc_ctx_state_lock_set(u32 state, struct gsc_ctx *ctx)
 414 {
 415         unsigned long flags;
 416
 417         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 418         ctx->state |= state;
 419         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 420 }
 421
 422 static inline void gsc_ctx_state_lock_clear(u32 state, struct gsc_ctx *ctx)
 423 {
 424         unsigned long flags;
 425
 426         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 427         ctx->state &= ~state;
 428         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 429 }
 430
 431 static inline int is_tiled(const struct gsc_fmt *fmt)
 432 {
 433         return fmt->pixelformat == V4L2_PIX_FMT_NV12MT_16X16;
 434 }
 435
 436 static inline void gsc_hw_enable_control(struct gsc_dev *dev, bool on)
 437 {
 438         u32 cfg = readl(dev->regs + GSC_ENABLE);
 439
 440         if (on)
 441                 cfg |= GSC_ENABLE_ON;
 442         else
 443                 cfg &= ~GSC_ENABLE_ON;
 444
 445         writel(cfg, dev->regs + GSC_ENABLE);
 446 }
 447
 448 static inline int gsc_hw_get_irq_status(struct gsc_dev *dev)
 449 {
 450         u32 cfg = readl(dev->regs + GSC_IRQ);
 451         if (cfg & GSC_IRQ_STATUS_OR_IRQ)
 452                 return GSC_IRQ_OVERRUN;
 453         else
 454                 return GSC_IRQ_DONE;
 455
 456 }
 457
 458 static inline void gsc_hw_clear_irq(struct gsc_dev *dev, int irq)
 459 {
 460         u32 cfg = readl(dev->regs + GSC_IRQ);
 461         if (irq == GSC_IRQ_OVERRUN)
 462                 cfg |= GSC_IRQ_STATUS_OR_IRQ;
 463         else if (irq == GSC_IRQ_DONE)
 464                 cfg |= GSC_IRQ_STATUS_FRM_DONE_IRQ;
 465         writel(cfg, dev->regs + GSC_IRQ);
 466 }
 467
 468 static inline void gsc_lock(struct vb2_queue *vq)
 469 {
 470         struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
 471         mutex_lock(&ctx->gsc_dev->lock);
 472 }
 473
 474 static inline void gsc_unlock(struct vb2_queue *vq)
 475 {
 476         struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
 477         mutex_unlock(&ctx->gsc_dev->lock);
 478 }
 479
 480 static inline bool gsc_ctx_state_is_set(u32 mask, struct gsc_ctx *ctx)
 481 {
 482         unsigned long flags;
 483         bool ret;
 484
 485         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 486         ret = (ctx->state & mask) == mask;
 487         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 488         return ret;
 489 }
 490
 491 static inline struct gsc_frame *ctx_get_frame(struct gsc_ctx *ctx,
 492                                               enum v4l2_buf_type type)
 493 {
 494         struct gsc_frame *frame;
 495
 496         if (V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE == type) {
 497                 frame = &ctx->s_frame;
 498         } else if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == type) {
 499                 frame = &ctx->d_frame;
 500         } else {
 501                 pr_err("Wrong buffer/video queue type (%d)", type);
 502                 return ERR_PTR(-EINVAL);
 503         }
 504
 505         return frame;
 506 }
 507
 508 void gsc_hw_set_sw_reset(struct gsc_dev *dev);
 509 int gsc_wait_reset(struct gsc_dev *dev);
 510
 511 void gsc_hw_set_frm_done_irq_mask(struct gsc_dev *dev, bool mask);
 512 void gsc_hw_set_gsc_irq_enable(struct gsc_dev *dev, bool mask);
 513 void gsc_hw_set_input_buf_masking(struct gsc_dev *dev, u32 shift, bool enable);
 514 void gsc_hw_set_output_buf_masking(struct gsc_dev *dev, u32 shift, bool enable);
 515 void gsc_hw_set_input_addr(struct gsc_dev *dev, struct gsc_addr *addr,
 516                                                         int index);
 517 void gsc_hw_set_output_addr(struct gsc_dev *dev, struct gsc_addr *addr,
 518                                                         int index);
 519 void gsc_hw_set_input_path(struct gsc_ctx *ctx);
 520 void gsc_hw_set_in_size(struct gsc_ctx *ctx);
 521 void gsc_hw_set_in_image_rgb(struct gsc_ctx *ctx);
 522 void gsc_hw_set_in_image_format(struct gsc_ctx *ctx);
 523 void gsc_hw_set_output_path(struct gsc_ctx *ctx);
 524 void gsc_hw_set_out_size(struct gsc_ctx *ctx);
 525 void gsc_hw_set_out_image_rgb(struct gsc_ctx *ctx);
 526 void gsc_hw_set_out_image_format(struct gsc_ctx *ctx);
 527 void gsc_hw_set_prescaler(struct gsc_ctx *ctx);
 528 void gsc_hw_set_mainscaler(struct gsc_ctx *ctx);
 529 void gsc_hw_set_rotation(struct gsc_ctx *ctx);
 530 void gsc_hw_set_global_alpha(struct gsc_ctx *ctx);
 531 void gsc_hw_set_sfr_update(struct gsc_ctx *ctx);
 532
 533 #endif /* GSC_CORE_H_ */