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 */
g2d_reset(struct g2d_dev * d)22 void g2d_reset(struct g2d_dev *d)
23 {
24 w(1, SOFT_RESET_REG);
25 }
26
g2d_set_src_size(struct g2d_dev * d,struct g2d_frame * f)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
g2d_set_src_addr(struct g2d_dev * d,dma_addr_t a)47 void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
48 {
49 w(a, SRC_BASE_ADDR_REG);
50 }
51
g2d_set_dst_size(struct g2d_dev * d,struct g2d_frame * f)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
g2d_set_dst_addr(struct g2d_dev * d,dma_addr_t a)72 void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
73 {
74 w(a, DST_BASE_ADDR_REG);
75 }
76
g2d_set_rop4(struct g2d_dev * d,u32 r)77 void g2d_set_rop4(struct g2d_dev *d, u32 r)
78 {
79 w(r, ROP4_REG);
80 }
81
g2d_set_flip(struct g2d_dev * d,u32 r)82 void g2d_set_flip(struct g2d_dev *d, u32 r)
83 {
84 w(r, SRC_MSK_DIRECT_REG);
85 }
86
g2d_set_v41_stretch(struct g2d_dev * d,struct g2d_frame * src,struct g2d_frame * dst)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
g2d_set_cmd(struct g2d_dev * d,u32 c)97 void g2d_set_cmd(struct g2d_dev *d, u32 c)
98 {
99 w(c, BITBLT_COMMAND_REG);
100 }
101
g2d_start(struct g2d_dev * d)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
g2d_clear_int(struct g2d_dev * d)114 void g2d_clear_int(struct g2d_dev *d)
115 {
116 w(1, INTC_PEND_REG);
117 }
118