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