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(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 
g2d_set_src_addr(struct g2d_dev * d,dma_addr_t a)46 void g2d_set_src_addr(struct g2d_dev *d, dma_addr_t a)
47 {
48 	w(a, SRC_BASE_ADDR_REG);
49 }
50 
g2d_set_dst_size(struct g2d_dev * d,struct g2d_frame * f)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 
g2d_set_dst_addr(struct g2d_dev * d,dma_addr_t a)70 void g2d_set_dst_addr(struct g2d_dev *d, dma_addr_t a)
71 {
72 	w(a, DST_BASE_ADDR_REG);
73 }
74 
g2d_set_rop4(struct g2d_dev * d,u32 r)75 void g2d_set_rop4(struct g2d_dev *d, u32 r)
76 {
77 	w(r, ROP4_REG);
78 }
79 
g2d_cmd_stretch(u32 e)80 u32 g2d_cmd_stretch(u32 e)
81 {
82 	e &= 1;
83 	return e << 4;
84 }
85 
g2d_set_cmd(struct g2d_dev * d,u32 c)86 void g2d_set_cmd(struct g2d_dev *d, u32 c)
87 {
88 	w(c, BITBLT_COMMAND_REG);
89 }
90 
g2d_start(struct g2d_dev * d)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 
g2d_clear_int(struct g2d_dev * d)101 void g2d_clear_int(struct g2d_dev *d)
102 {
103 	w(1, INTC_PEND_REG);
104 }
105