drivers/media/video/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(f->stride & 0xFFFF, SRC_STRIDE_REG);
  32
  33         n = f->o_height & 0xFFF;
  34         n <<= 16;
  35         n |= f->o_width & 0xFFF;
  36         w(n, SRC_LEFT_TOP_REG);
  37
  38         n = f->bottom & 0xFFF;
  39         n <<= 16;
  40         n |= f->right & 0xFFF;
  41         w(n, SRC_RIGHT_BOTTOM_REG);
  42
  43         w(f->fmt->hw, SRC_COLOR_MODE_REG);
  44 }
  45
  46 void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
  47 {
  48         w(a, SRC_BASE_ADDR_REG);
  49 }
  50
  51 void g2d_set_dst_size(struct g2d_dev *d, struct g2d_frame *f)
  52 {
  53         u32 n;
  54
  55         w(f->stride & 0xFFFF, DST_STRIDE_REG);
  56
  57         n = f->o_height & 0xFFF;
  58         n <<= 16;
  59         n |= f->o_width & 0xFFF;
  60         w(n, DST_LEFT_TOP_REG);
  61
  62         n = f->bottom & 0xFFF;
  63         n <<= 16;
  64         n |= f->right & 0xFFF;
  65         w(n, DST_RIGHT_BOTTOM_REG);
  66
  67         w(f->fmt->hw, DST_COLOR_MODE_REG);
  68 }
  69
  70 void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
  71 {
  72         w(a, DST_BASE_ADDR_REG);
  73 }
  74
  75 void g2d_set_rop4(struct g2d_dev *d, u32 r)
  76 {
  77         w(r, ROP4_REG);
  78 }
  79
  80 u32 g2d_cmd_stretch(u32 e)
  81 {
  82         e &= 1;
  83         return e << 4;
  84 }
  85
  86 void g2d_set_cmd(struct g2d_dev *d, u32 c)
  87 {
  88         w(c, BITBLT_COMMAND_REG);
  89 }
  90
  91 void g2d_start(struct g2d_dev *d)
  92 {
  93         /* Clear cache */
  94         w(0x7, CACHECTL_REG);
  95         /* Enable interrupt */
  96         w(1, INTEN_REG);
  97         /* Start G2D engine */
  98         w(1, BITBLT_START_REG);
  99 }
 100
 101 void g2d_clear_int(struct g2d_dev *d)
 102 {
 103         w(1, INTC_PEND_REG);
 104 }