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}