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 */
g2d_reset(struct g2d_dev * d)18 void g2d_reset(struct g2d_dev *d)
19 {
20 w(1, SOFT_RESET_REG);
21 }
22
g2d_set_src_size(struct g2d_dev * d,struct g2d_frame * f)23 void 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
g2d_set_src_addr(struct g2d_dev * d,dma_addr_t a)43 void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
44 {
45 w(a, SRC_BASE_ADDR_REG);
46 }
47
g2d_set_dst_size(struct g2d_dev * d,struct g2d_frame * f)48 void 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
g2d_set_dst_addr(struct g2d_dev * d,dma_addr_t a)68 void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
69 {
70 w(a, DST_BASE_ADDR_REG);
71 }
72
g2d_set_rop4(struct g2d_dev * d,u32 r)73 void g2d_set_rop4(struct g2d_dev *d, u32 r)
74 {
75 w(r, ROP4_REG);
76 }
77
g2d_set_flip(struct g2d_dev * d,u32 r)78 void g2d_set_flip(struct g2d_dev *d, u32 r)
79 {
80 w(r, SRC_MSK_DIRECT_REG);
81 }
82
g2d_set_v41_stretch(struct g2d_dev * d,struct g2d_frame * src,struct g2d_frame * dst)83 void 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
g2d_set_cmd(struct g2d_dev * d,u32 c)93 void g2d_set_cmd(struct g2d_dev *d, u32 c)
94 {
95 w(c, BITBLT_COMMAND_REG);
96 }
97
g2d_start(struct g2d_dev * d)98 void 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
g2d_clear_int(struct g2d_dev * d)110 void g2d_clear_int(struct g2d_dev *d)
111 {
112 w(1, INTC_PEND_REG);
113 }
114