19c92ab61SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2f7018c21STomi Valkeinen /*
3f7018c21STomi Valkeinen * linux/drivers/video/wmt_ge_rops.c
4f7018c21STomi Valkeinen *
5f7018c21STomi Valkeinen * Accelerators for raster operations using WonderMedia Graphics Engine
6f7018c21STomi Valkeinen *
7f7018c21STomi Valkeinen * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
8f7018c21STomi Valkeinen */
9f7018c21STomi Valkeinen
10f7018c21STomi Valkeinen #include <linux/module.h>
11f7018c21STomi Valkeinen #include <linux/fb.h>
12*e1d534acSThomas Zimmermann #include <linux/io.h>
13f7018c21STomi Valkeinen #include <linux/platform_device.h>
14*e1d534acSThomas Zimmermann
1519757fc8STomi Valkeinen #include "core/fb_draw.h"
165825e11cSSam Ravnborg #include "wmt_ge_rops.h"
17f7018c21STomi Valkeinen
18f7018c21STomi Valkeinen #define GE_COMMAND_OFF 0x00
19f7018c21STomi Valkeinen #define GE_DEPTH_OFF 0x04
20f7018c21STomi Valkeinen #define GE_HIGHCOLOR_OFF 0x08
21f7018c21STomi Valkeinen #define GE_ROPCODE_OFF 0x14
22f7018c21STomi Valkeinen #define GE_FIRE_OFF 0x18
23f7018c21STomi Valkeinen #define GE_SRCBASE_OFF 0x20
24f7018c21STomi Valkeinen #define GE_SRCDISPW_OFF 0x24
25f7018c21STomi Valkeinen #define GE_SRCDISPH_OFF 0x28
26f7018c21STomi Valkeinen #define GE_SRCAREAX_OFF 0x2c
27f7018c21STomi Valkeinen #define GE_SRCAREAY_OFF 0x30
28f7018c21STomi Valkeinen #define GE_SRCAREAW_OFF 0x34
29f7018c21STomi Valkeinen #define GE_SRCAREAH_OFF 0x38
30f7018c21STomi Valkeinen #define GE_DESTBASE_OFF 0x3c
31f7018c21STomi Valkeinen #define GE_DESTDISPW_OFF 0x40
32f7018c21STomi Valkeinen #define GE_DESTDISPH_OFF 0x44
33f7018c21STomi Valkeinen #define GE_DESTAREAX_OFF 0x48
34f7018c21STomi Valkeinen #define GE_DESTAREAY_OFF 0x4c
35f7018c21STomi Valkeinen #define GE_DESTAREAW_OFF 0x50
36f7018c21STomi Valkeinen #define GE_DESTAREAH_OFF 0x54
37f7018c21STomi Valkeinen #define GE_PAT0C_OFF 0x88 /* Pattern 0 color */
38f7018c21STomi Valkeinen #define GE_ENABLE_OFF 0xec
39f7018c21STomi Valkeinen #define GE_INTEN_OFF 0xf0
40f7018c21STomi Valkeinen #define GE_STATUS_OFF 0xf8
41f7018c21STomi Valkeinen
42f7018c21STomi Valkeinen static void __iomem *regbase;
43f7018c21STomi Valkeinen
wmt_ge_fillrect(struct fb_info * p,const struct fb_fillrect * rect)44f7018c21STomi Valkeinen void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
45f7018c21STomi Valkeinen {
46f7018c21STomi Valkeinen unsigned long fg, pat;
47f7018c21STomi Valkeinen
48f7018c21STomi Valkeinen if (p->state != FBINFO_STATE_RUNNING)
49f7018c21STomi Valkeinen return;
50f7018c21STomi Valkeinen
51f7018c21STomi Valkeinen if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
52f7018c21STomi Valkeinen p->fix.visual == FB_VISUAL_DIRECTCOLOR)
53f7018c21STomi Valkeinen fg = ((u32 *) (p->pseudo_palette))[rect->color];
54f7018c21STomi Valkeinen else
55f7018c21STomi Valkeinen fg = rect->color;
56f7018c21STomi Valkeinen
57f7018c21STomi Valkeinen pat = pixel_to_pat(p->var.bits_per_pixel, fg);
58f7018c21STomi Valkeinen
59f7018c21STomi Valkeinen if (p->fbops->fb_sync)
60f7018c21STomi Valkeinen p->fbops->fb_sync(p);
61f7018c21STomi Valkeinen
62f7018c21STomi Valkeinen writel(p->var.bits_per_pixel == 32 ? 3 :
63f7018c21STomi Valkeinen (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF);
64f7018c21STomi Valkeinen writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF);
65f7018c21STomi Valkeinen writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
66f7018c21STomi Valkeinen writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
67f7018c21STomi Valkeinen writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
68f7018c21STomi Valkeinen writel(rect->dx, regbase + GE_DESTAREAX_OFF);
69f7018c21STomi Valkeinen writel(rect->dy, regbase + GE_DESTAREAY_OFF);
70f7018c21STomi Valkeinen writel(rect->width - 1, regbase + GE_DESTAREAW_OFF);
71f7018c21STomi Valkeinen writel(rect->height - 1, regbase + GE_DESTAREAH_OFF);
72f7018c21STomi Valkeinen
73f7018c21STomi Valkeinen writel(pat, regbase + GE_PAT0C_OFF);
74f7018c21STomi Valkeinen writel(1, regbase + GE_COMMAND_OFF);
75f7018c21STomi Valkeinen writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF);
76f7018c21STomi Valkeinen writel(1, regbase + GE_FIRE_OFF);
77f7018c21STomi Valkeinen }
78f7018c21STomi Valkeinen EXPORT_SYMBOL_GPL(wmt_ge_fillrect);
79f7018c21STomi Valkeinen
wmt_ge_copyarea(struct fb_info * p,const struct fb_copyarea * area)80f7018c21STomi Valkeinen void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area)
81f7018c21STomi Valkeinen {
82f7018c21STomi Valkeinen if (p->state != FBINFO_STATE_RUNNING)
83f7018c21STomi Valkeinen return;
84f7018c21STomi Valkeinen
85f7018c21STomi Valkeinen if (p->fbops->fb_sync)
86f7018c21STomi Valkeinen p->fbops->fb_sync(p);
87f7018c21STomi Valkeinen
88f7018c21STomi Valkeinen writel(p->var.bits_per_pixel > 16 ? 3 :
89f7018c21STomi Valkeinen (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF);
90f7018c21STomi Valkeinen
91f7018c21STomi Valkeinen writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF);
92f7018c21STomi Valkeinen writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF);
93f7018c21STomi Valkeinen writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF);
94f7018c21STomi Valkeinen writel(area->sx, regbase + GE_SRCAREAX_OFF);
95f7018c21STomi Valkeinen writel(area->sy, regbase + GE_SRCAREAY_OFF);
96f7018c21STomi Valkeinen writel(area->width - 1, regbase + GE_SRCAREAW_OFF);
97f7018c21STomi Valkeinen writel(area->height - 1, regbase + GE_SRCAREAH_OFF);
98f7018c21STomi Valkeinen
99f7018c21STomi Valkeinen writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF);
100f7018c21STomi Valkeinen writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF);
101f7018c21STomi Valkeinen writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF);
102f7018c21STomi Valkeinen writel(area->dx, regbase + GE_DESTAREAX_OFF);
103f7018c21STomi Valkeinen writel(area->dy, regbase + GE_DESTAREAY_OFF);
104f7018c21STomi Valkeinen writel(area->width - 1, regbase + GE_DESTAREAW_OFF);
105f7018c21STomi Valkeinen writel(area->height - 1, regbase + GE_DESTAREAH_OFF);
106f7018c21STomi Valkeinen
107f7018c21STomi Valkeinen writel(0xcc, regbase + GE_ROPCODE_OFF);
108f7018c21STomi Valkeinen writel(1, regbase + GE_COMMAND_OFF);
109f7018c21STomi Valkeinen writel(1, regbase + GE_FIRE_OFF);
110f7018c21STomi Valkeinen }
111f7018c21STomi Valkeinen EXPORT_SYMBOL_GPL(wmt_ge_copyarea);
112f7018c21STomi Valkeinen
wmt_ge_sync(struct fb_info * p)113f7018c21STomi Valkeinen int wmt_ge_sync(struct fb_info *p)
114f7018c21STomi Valkeinen {
115f7018c21STomi Valkeinen int loops = 5000000;
116f7018c21STomi Valkeinen while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops)
117f7018c21STomi Valkeinen cpu_relax();
118f7018c21STomi Valkeinen return loops > 0 ? 0 : -EBUSY;
119f7018c21STomi Valkeinen }
120f7018c21STomi Valkeinen EXPORT_SYMBOL_GPL(wmt_ge_sync);
121f7018c21STomi Valkeinen
wmt_ge_rops_probe(struct platform_device * pdev)122f7018c21STomi Valkeinen static int wmt_ge_rops_probe(struct platform_device *pdev)
123f7018c21STomi Valkeinen {
124f7018c21STomi Valkeinen struct resource *res;
125f7018c21STomi Valkeinen
126f7018c21STomi Valkeinen res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
127f7018c21STomi Valkeinen if (res == NULL) {
128f7018c21STomi Valkeinen dev_err(&pdev->dev, "no I/O memory resource defined\n");
129f7018c21STomi Valkeinen return -ENODEV;
130f7018c21STomi Valkeinen }
131f7018c21STomi Valkeinen
132f7018c21STomi Valkeinen /* Only one ROP engine is presently supported. */
133f7018c21STomi Valkeinen if (unlikely(regbase)) {
134f7018c21STomi Valkeinen WARN_ON(1);
135f7018c21STomi Valkeinen return -EBUSY;
136f7018c21STomi Valkeinen }
137f7018c21STomi Valkeinen
138f7018c21STomi Valkeinen regbase = ioremap(res->start, resource_size(res));
139f7018c21STomi Valkeinen if (regbase == NULL) {
140f7018c21STomi Valkeinen dev_err(&pdev->dev, "failed to map I/O memory\n");
141f7018c21STomi Valkeinen return -EBUSY;
142f7018c21STomi Valkeinen }
143f7018c21STomi Valkeinen
144f7018c21STomi Valkeinen writel(1, regbase + GE_ENABLE_OFF);
145f7018c21STomi Valkeinen printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n");
146f7018c21STomi Valkeinen
147f7018c21STomi Valkeinen return 0;
148f7018c21STomi Valkeinen }
149f7018c21STomi Valkeinen
wmt_ge_rops_remove(struct platform_device * pdev)15089c4bbd4SUwe Kleine-König static void wmt_ge_rops_remove(struct platform_device *pdev)
151f7018c21STomi Valkeinen {
152f7018c21STomi Valkeinen iounmap(regbase);
153f7018c21STomi Valkeinen }
154f7018c21STomi Valkeinen
155f7018c21STomi Valkeinen static const struct of_device_id wmt_dt_ids[] = {
156f7018c21STomi Valkeinen { .compatible = "wm,prizm-ge-rops", },
157f7018c21STomi Valkeinen { /* sentinel */ }
158f7018c21STomi Valkeinen };
159f7018c21STomi Valkeinen
160f7018c21STomi Valkeinen static struct platform_driver wmt_ge_rops_driver = {
161f7018c21STomi Valkeinen .probe = wmt_ge_rops_probe,
16289c4bbd4SUwe Kleine-König .remove_new = wmt_ge_rops_remove,
163f7018c21STomi Valkeinen .driver = {
164f7018c21STomi Valkeinen .name = "wmt_ge_rops",
165f7018c21STomi Valkeinen .of_match_table = wmt_dt_ids,
166f7018c21STomi Valkeinen },
167f7018c21STomi Valkeinen };
168f7018c21STomi Valkeinen
169f7018c21STomi Valkeinen module_platform_driver(wmt_ge_rops_driver);
170f7018c21STomi Valkeinen
171f7018c21STomi Valkeinen MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>");
172f7018c21STomi Valkeinen MODULE_DESCRIPTION("Accelerators for raster operations using "
173f7018c21STomi Valkeinen "WonderMedia Graphics Engine");
174f7018c21STomi Valkeinen MODULE_DEVICE_TABLE(of, wmt_dt_ids);
175