LXR linux/drivers/media/platform/s5p-g2d/g2d-hw.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Samsung S5P G2D - 2D Graphics Accelerator Driver
   4 *
   5 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   6 * Kamil Debski, <k.debski@samsung.com>
   7 */
   8
   9#include <linux/io.h>
  10
  11#include "g2d.h"
  12#include "g2d-regs.h"
  13
  14#define w(x, a) writel((x), d->regs + (a))
  15#define r(a)    readl(d->regs + (a))
  16
  17/* g2d_reset clears all g2d registers */
  18void g2d_reset(struct g2d_dev *d)
  19{
  20        w(1, SOFT_RESET_REG);
  21}
  22
  23void g2d_set_src_size(struct g2d_dev *d, struct g2d_frame *f)
  24{
  25        u32 n;
  26
  27        w(0, SRC_SELECT_REG);
  28        w(f->stride & 0xFFFF, SRC_STRIDE_REG);
  29
  30        n = f->o_height & 0xFFF;
  31        n <<= 16;
  32        n |= f->o_width & 0xFFF;
  33        w(n, SRC_LEFT_TOP_REG);
  34
  35        n = f->bottom & 0xFFF;
  36        n <<= 16;
  37        n |= f->right & 0xFFF;
  38        w(n, SRC_RIGHT_BOTTOM_REG);
  39
  40        w(f->fmt->hw, SRC_COLOR_MODE_REG);
  41}
  42
  43void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
  44{
  45        w(a, SRC_BASE_ADDR_REG);
  46}
  47
  48void g2d_set_dst_size(struct g2d_dev *d, struct g2d_frame *f)
  49{
  50        u32 n;
  51
  52        w(0, DST_SELECT_REG);
  53        w(f->stride & 0xFFFF, DST_STRIDE_REG);
  54
  55        n = f->o_height & 0xFFF;
  56        n <<= 16;
  57        n |= f->o_width & 0xFFF;
  58        w(n, DST_LEFT_TOP_REG);
  59
  60        n = f->bottom & 0xFFF;
  61        n <<= 16;
  62        n |= f->right & 0xFFF;
  63        w(n, DST_RIGHT_BOTTOM_REG);
  64
  65        w(f->fmt->hw, DST_COLOR_MODE_REG);
  66}
  67
  68void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
  69{
  70        w(a, DST_BASE_ADDR_REG);
  71}
  72
  73void g2d_set_rop4(struct g2d_dev *d, u32 r)
  74{
  75        w(r, ROP4_REG);
  76}
  77
  78void g2d_set_flip(struct g2d_dev *d, u32 r)
  79{
  80        w(r, SRC_MSK_DIRECT_REG);
  81}
  82
  83void g2d_set_v41_stretch(struct g2d_dev *d, struct g2d_frame *src,
  84                                        struct g2d_frame *dst)
  85{
  86        w(DEFAULT_SCALE_MODE, SRC_SCALE_CTRL_REG);
  87
  88        /* inversed scaling factor: src is numerator */
  89        w((src->c_width << 16) / dst->c_width, SRC_XSCALE_REG);
  90        w((src->c_height << 16) / dst->c_height, SRC_YSCALE_REG);
  91}
  92
  93void g2d_set_cmd(struct g2d_dev *d, u32 c)
  94{
  95        w(c, BITBLT_COMMAND_REG);
  96}
  97
  98void g2d_start(struct g2d_dev *d)
  99{
 100        /* Clear cache */
 101        if (d->variant->hw_rev == TYPE_G2D_3X)
 102                w(0x7, CACHECTL_REG);
 103
 104        /* Enable interrupt */
 105        w(1, INTEN_REG);
 106        /* Start G2D engine */
 107        w(1, BITBLT_START_REG);
 108}
 109
 110void g2d_clear_int(struct g2d_dev *d)
 111{
 112        w(1, INTC_PEND_REG);
 113}
 114