tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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/platform_device.h>
13#include "core/fb_draw.h"
14
15#define GE_COMMAND_OFF 0x00
16#define GE_DEPTH_OFF 0x04
17#define GE_HIGHCOLOR_OFF 0x08
18#define GE_ROPCODE_OFF 0x14
19#define GE_FIRE_OFF 0x18
20#define GE_SRCBASE_OFF 0x20
21#define GE_SRCDISPW_OFF 0x24
22#define GE_SRCDISPH_OFF 0x28
23#define GE_SRCAREAX_OFF 0x2c
24#define GE_SRCAREAY_OFF 0x30
25#define GE_SRCAREAW_OFF 0x34
26#define GE_SRCAREAH_OFF 0x38
27#define GE_DESTBASE_OFF 0x3c
28#define GE_DESTDISPW_OFF 0x40
29#define GE_DESTDISPH_OFF 0x44
30#define GE_DESTAREAX_OFF 0x48
31#define GE_DESTAREAY_OFF 0x4c
32#define GE_DESTAREAW_OFF 0x50
33#define GE_DESTAREAH_OFF 0x54
34#define GE_PAT0C_OFF 0x88 /* Pattern 0 color */
35#define GE_ENABLE_OFF 0xec
36#define GE_INTEN_OFF 0xf0
37#define GE_STATUS_OFF 0xf8
38
39static void __iomem *regbase;
40
41void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
42{
43 unsigned long fg, pat;
44
45 if (p->state != FBINFO_STATE_RUNNING)
46 return;
47
48 if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
49 p->fix.visual == FB_VISUAL_DIRECTCOLOR)
50 fg = ((u32 *) (p->pseudo_palette))[rect->color];
51 else
52 fg = rect->color;
53
54 pat = pixel_to_pat(p->var.bits_per_pixel, fg);
55
56 if (p->fbops->fb_sync)
57 p->fbops->fb_sync(p);
58
59 writel(p->var.bits_per_pixel == 32 ? 3 :
60 (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF);
61 writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF);
62 writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
63 writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
64 writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
65 writel(rect->dx, regbase + GE_DESTAREAX_OFF);
66 writel(rect->dy, regbase + GE_DESTAREAY_OFF);
67 writel(rect->width - 1, regbase + GE_DESTAREAW_OFF);
68 writel(rect->height - 1, regbase + GE_DESTAREAH_OFF);
69
70 writel(pat, regbase + GE_PAT0C_OFF);
71 writel(1, regbase + GE_COMMAND_OFF);
72 writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF);
73 writel(1, regbase + GE_FIRE_OFF);
74}
75EXPORT_SYMBOL_GPL(wmt_ge_fillrect);
76
77void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area)
78{
79 if (p->state != FBINFO_STATE_RUNNING)
80 return;
81
82 if (p->fbops->fb_sync)
83 p->fbops->fb_sync(p);
84
85 writel(p->var.bits_per_pixel > 16 ? 3 :
86 (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF);
87
88 writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF);
89 writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF);
90 writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF);
91 writel(area->sx, regbase + GE_SRCAREAX_OFF);
92 writel(area->sy, regbase + GE_SRCAREAY_OFF);
93 writel(area->width - 1, regbase + GE_SRCAREAW_OFF);
94 writel(area->height - 1, regbase + GE_SRCAREAH_OFF);
95
96 writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
97 writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
98 writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
99 writel(area->dx, regbase + GE_DESTAREAX_OFF);
100 writel(area->dy, regbase + GE_DESTAREAY_OFF);
101 writel(area->width - 1, regbase + GE_DESTAREAW_OFF);
102 writel(area->height - 1, regbase + GE_DESTAREAH_OFF);
103
104 writel(0xcc, regbase + GE_ROPCODE_OFF);
105 writel(1, regbase + GE_COMMAND_OFF);
106 writel(1, regbase + GE_FIRE_OFF);
107}
108EXPORT_SYMBOL_GPL(wmt_ge_copyarea);
109
110int wmt_ge_sync(struct fb_info *p)
111{
112 int loops = 5000000;
113 while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops)
114 cpu_relax();
115 return loops > 0 ? 0 : -EBUSY;
116}
117EXPORT_SYMBOL_GPL(wmt_ge_sync);
118
119static int wmt_ge_rops_probe(struct platform_device *pdev)
120{
121 struct resource *res;
122
123 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
124 if (res == NULL) {
125 dev_err(&pdev->dev, "no I/O memory resource defined\n");
126 return -ENODEV;
127 }
128
129 /* Only one ROP engine is presently supported. */
130 if (unlikely(regbase)) {
131 WARN_ON(1);
132 return -EBUSY;
133 }
134
135 regbase = ioremap(res->start, resource_size(res));
136 if (regbase == NULL) {
137 dev_err(&pdev->dev, "failed to map I/O memory\n");
138 return -EBUSY;
139 }
140
141 writel(1, regbase + GE_ENABLE_OFF);
142 printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n");
143
144 return 0;
145}
146
147static int wmt_ge_rops_remove(struct platform_device *pdev)
148{
149 iounmap(regbase);
150 return 0;
151}
152
153static const struct of_device_id wmt_dt_ids[] = {
154 { .compatible = "wm,prizm-ge-rops", },
155 { /* sentinel */ }
156};
157
158static struct platform_driver wmt_ge_rops_driver = {
159 .probe = wmt_ge_rops_probe,
160 .remove = wmt_ge_rops_remove,
161 .driver = {
162 .name = "wmt_ge_rops",
163 .of_match_table = wmt_dt_ids,
164 },
165};
166
167module_platform_driver(wmt_ge_rops_driver);
168
169MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>");
170MODULE_DESCRIPTION("Accelerators for raster operations using "
171 "WonderMedia Graphics Engine");
172MODULE_LICENSE("GPL v2");
173MODULE_DEVICE_TABLE(of, wmt_dt_ids);