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

   1 /*
   2  * Samsung S5P G2D - 2D Graphics Accelerator Driver
   3  *
   4  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   5  * Kamil Debski, <k.debski@samsung.com>
   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 as published by the
   9  * Free Software Foundation; either version 2 of the
  10  * License, or (at your option) any later version
  11  */
  12
  13 #include <linux/io.h>
  14
  15 #include "g2d.h"
  16 #include "g2d-regs.h"
  17
  18 #define w(x, a) writel((x), d->regs + (a))
  19 #define r(a)    readl(d->regs + (a))
  20
  21 /* g2d_reset clears all g2d registers */
  22 void g2d_reset(struct g2d_dev *d)
  23 {
  24         w(1, SOFT_RESET_REG);
  25 }
  26
  27 void g2d_set_src_size(struct g2d_dev *d, struct g2d_frame *f)
  28 {
  29         u32 n;
  30
  31         w(0, SRC_SELECT_REG);
  32         w(f->stride & 0xFFFF, SRC_STRIDE_REG);
  33
  34         n = f->o_height & 0xFFF;
  35         n <<= 16;
  36         n |= f->o_width & 0xFFF;
  37         w(n, SRC_LEFT_TOP_REG);
  38
  39         n = f->bottom & 0xFFF;
  40         n <<= 16;
  41         n |= f->right & 0xFFF;
  42         w(n, SRC_RIGHT_BOTTOM_REG);
  43
  44         w(f->fmt->hw, SRC_COLOR_MODE_REG);
  45 }
  46
  47 void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
  48 {
  49         w(a, SRC_BASE_ADDR_REG);
  50 }
  51
  52 void g2d_set_dst_size(struct g2d_dev *d, struct g2d_frame *f)
  53 {
  54         u32 n;
  55
  56         w(0, DST_SELECT_REG);
  57         w(f->stride & 0xFFFF, DST_STRIDE_REG);
  58
  59         n = f->o_height & 0xFFF;
  60         n <<= 16;
  61         n |= f->o_width & 0xFFF;
  62         w(n, DST_LEFT_TOP_REG);
  63
  64         n = f->bottom & 0xFFF;
  65         n <<= 16;
  66         n |= f->right & 0xFFF;
  67         w(n, DST_RIGHT_BOTTOM_REG);
  68
  69         w(f->fmt->hw, DST_COLOR_MODE_REG);
  70 }
  71
  72 void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
  73 {
  74         w(a, DST_BASE_ADDR_REG);
  75 }
  76
  77 void g2d_set_rop4(struct g2d_dev *d, u32 r)
  78 {
  79         w(r, ROP4_REG);
  80 }
  81
  82 void g2d_set_flip(struct g2d_dev *d, u32 r)
  83 {
  84         w(r, SRC_MSK_DIRECT_REG);
  85 }
  86
  87 void g2d_set_v41_stretch(struct g2d_dev *d, struct g2d_frame *src,
  88                                         struct g2d_frame *dst)
  89 {
  90         w(DEFAULT_SCALE_MODE, SRC_SCALE_CTRL_REG);
  91
  92         /* inversed scaling factor: src is numerator */
  93         w((src->c_width << 16) / dst->c_width, SRC_XSCALE_REG);
  94         w((src->c_height << 16) / dst->c_height, SRC_YSCALE_REG);
  95 }
  96
  97 void g2d_set_cmd(struct g2d_dev *d, u32 c)
  98 {
  99         w(c, BITBLT_COMMAND_REG);
 100 }
 101
 102 void g2d_start(struct g2d_dev *d)
 103 {
 104         /* Clear cache */
 105         if (d->variant->hw_rev == TYPE_G2D_3X)
 106                 w(0x7, CACHECTL_REG);
 107
 108         /* Enable interrupt */
 109         w(1, INTEN_REG);
 110         /* Start G2D engine */
 111         w(1, BITBLT_START_REG);
 112 }
 113
 114 void g2d_clear_int(struct g2d_dev *d)
 115 {
 116         w(1, INTC_PEND_REG);
 117 }