1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/drivers/video/wmt_ge_rops.c
4 *
5 * Accelerators for raster operations using WonderMedia Graphics Engine
6 *
7 * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
8 */
9
10#include <linux/module.h>
11#include <linux/fb.h>
12#include <linux/io.h>
13#include <linux/platform_device.h>
14
15#include "core/fb_draw.h"
16#include "wmt_ge_rops.h"
17
18#define GE_COMMAND_OFF 0x00
19#define GE_DEPTH_OFF 0x04
20#define GE_HIGHCOLOR_OFF 0x08
21#define GE_ROPCODE_OFF 0x14
22#define GE_FIRE_OFF 0x18
23#define GE_SRCBASE_OFF 0x20
24#define GE_SRCDISPW_OFF 0x24
25#define GE_SRCDISPH_OFF 0x28
26#define GE_SRCAREAX_OFF 0x2c
27#define GE_SRCAREAY_OFF 0x30
28#define GE_SRCAREAW_OFF 0x34
29#define GE_SRCAREAH_OFF 0x38
30#define GE_DESTBASE_OFF 0x3c
31#define GE_DESTDISPW_OFF 0x40
32#define GE_DESTDISPH_OFF 0x44
33#define GE_DESTAREAX_OFF 0x48
34#define GE_DESTAREAY_OFF 0x4c
35#define GE_DESTAREAW_OFF 0x50
36#define GE_DESTAREAH_OFF 0x54
37#define GE_PAT0C_OFF 0x88 /* Pattern 0 color */
38#define GE_ENABLE_OFF 0xec
39#define GE_INTEN_OFF 0xf0
40#define GE_STATUS_OFF 0xf8
41
42static void __iomem *regbase;
43
44void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
45{
46 unsigned long fg, pat;
47
48 if (p->state != FBINFO_STATE_RUNNING)
49 return;
50
51 if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
52 p->fix.visual == FB_VISUAL_DIRECTCOLOR)
53 fg = ((u32 *) (p->pseudo_palette))[rect->color];
54 else
55 fg = rect->color;
56
57 pat = pixel_to_pat(bpp: p->var.bits_per_pixel, pixel: fg);
58
59 if (p->fbops->fb_sync)
60 p->fbops->fb_sync(p);
61
62 writel(val: p->var.bits_per_pixel == 32 ? 3 :
63 (p->var.bits_per_pixel == 8 ? 0 : 1), addr: regbase + GE_DEPTH_OFF);
64 writel(val: p->var.bits_per_pixel == 15 ? 1 : 0, addr: regbase + GE_HIGHCOLOR_OFF);
65 writel(val: p->fix.smem_start, addr: regbase + GE_DESTBASE_OFF);
66 writel(val: p->var.xres_virtual - 1, addr: regbase + GE_DESTDISPW_OFF);
67 writel(val: p->var.yres_virtual - 1, addr: regbase + GE_DESTDISPH_OFF);
68 writel(val: rect->dx, addr: regbase + GE_DESTAREAX_OFF);
69 writel(val: rect->dy, addr: regbase + GE_DESTAREAY_OFF);
70 writel(val: rect->width - 1, addr: regbase + GE_DESTAREAW_OFF);
71 writel(val: rect->height - 1, addr: regbase + GE_DESTAREAH_OFF);
72
73 writel(val: pat, addr: regbase + GE_PAT0C_OFF);
74 writel(val: 1, addr: regbase + GE_COMMAND_OFF);
75 writel(val: rect->rop == ROP_XOR ? 0x5a : 0xf0, addr: regbase + GE_ROPCODE_OFF);
76 writel(val: 1, addr: regbase + GE_FIRE_OFF);
77}
78EXPORT_SYMBOL_GPL(wmt_ge_fillrect);
79
80void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area)
81{
82 if (p->state != FBINFO_STATE_RUNNING)
83 return;
84
85 if (p->fbops->fb_sync)
86 p->fbops->fb_sync(p);
87
88 writel(val: p->var.bits_per_pixel > 16 ? 3 :
89 (p->var.bits_per_pixel > 8 ? 1 : 0), addr: regbase + GE_DEPTH_OFF);
90
91 writel(val: p->fix.smem_start, addr: regbase + GE_SRCBASE_OFF);
92 writel(val: p->var.xres_virtual - 1, addr: regbase + GE_SRCDISPW_OFF);
93 writel(val: p->var.yres_virtual - 1, addr: regbase + GE_SRCDISPH_OFF);
94 writel(val: area->sx, addr: regbase + GE_SRCAREAX_OFF);
95 writel(val: area->sy, addr: regbase + GE_SRCAREAY_OFF);
96 writel(val: area->width - 1, addr: regbase + GE_SRCAREAW_OFF);
97 writel(val: area->height - 1, addr: regbase + GE_SRCAREAH_OFF);
98
99 writel(val: p->fix.smem_start, addr: regbase + GE_DESTBASE_OFF);
100 writel(val: p->var.xres_virtual - 1, addr: regbase + GE_DESTDISPW_OFF);
101 writel(val: p->var.yres_virtual - 1, addr: regbase + GE_DESTDISPH_OFF);
102 writel(val: area->dx, addr: regbase + GE_DESTAREAX_OFF);
103 writel(val: area->dy, addr: regbase + GE_DESTAREAY_OFF);
104 writel(val: area->width - 1, addr: regbase + GE_DESTAREAW_OFF);
105 writel(val: area->height - 1, addr: regbase + GE_DESTAREAH_OFF);
106
107 writel(val: 0xcc, addr: regbase + GE_ROPCODE_OFF);
108 writel(val: 1, addr: regbase + GE_COMMAND_OFF);
109 writel(val: 1, addr: regbase + GE_FIRE_OFF);
110}
111EXPORT_SYMBOL_GPL(wmt_ge_copyarea);
112
113int wmt_ge_sync(struct fb_info *p)
114{
115 int loops = 5000000;
116 while ((readl(addr: regbase + GE_STATUS_OFF) & 4) && --loops)
117 cpu_relax();
118 return loops > 0 ? 0 : -EBUSY;
119}
120EXPORT_SYMBOL_GPL(wmt_ge_sync);
121
122static int wmt_ge_rops_probe(struct platform_device *pdev)
123{
124 struct resource *res;
125
126 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
127 if (res == NULL) {
128 dev_err(&pdev->dev, "no I/O memory resource defined\n");
129 return -ENODEV;
130 }
131
132 /* Only one ROP engine is presently supported. */
133 if (unlikely(regbase)) {
134 WARN_ON(1);
135 return -EBUSY;
136 }
137
138 regbase = ioremap(offset: res->start, size: resource_size(res));
139 if (regbase == NULL) {
140 dev_err(&pdev->dev, "failed to map I/O memory\n");
141 return -EBUSY;
142 }
143
144 writel(val: 1, addr: regbase + GE_ENABLE_OFF);
145 printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n");
146
147 return 0;
148}
149
150static void wmt_ge_rops_remove(struct platform_device *pdev)
151{
152 iounmap(addr: regbase);
153}
154
155static const struct of_device_id wmt_dt_ids[] = {
156 { .compatible = "wm,prizm-ge-rops", },
157 { /* sentinel */ }
158};
159
160static struct platform_driver wmt_ge_rops_driver = {
161 .probe = wmt_ge_rops_probe,
162 .remove_new = wmt_ge_rops_remove,
163 .driver = {
164 .name = "wmt_ge_rops",
165 .of_match_table = wmt_dt_ids,
166 },
167};
168
169module_platform_driver(wmt_ge_rops_driver);
170
171MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>");
172MODULE_DESCRIPTION("Accelerators for raster operations using "
173 "WonderMedia Graphics Engine");
174MODULE_DEVICE_TABLE(of, wmt_dt_ids);
175

source code of linux/drivers/video/fbdev/wmt_ge_rops.c