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d6ff7d0f AC |
1 | /* |
2 | * linux/drivers/video/wmt_ge_rops.c | |
3 | * | |
4 | * Accelerators for raster operations using WonderMedia Graphics Engine | |
5 | * | |
6 | * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> | |
7 | * | |
8 | * This software is licensed under the terms of the GNU General Public | |
9 | * License version 2, as published by the Free Software Foundation, and | |
10 | * may be copied, distributed, and modified under those terms. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/fb.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include "fb_draw.h" | |
22 | ||
23 | #define GE_COMMAND_OFF 0x00 | |
24 | #define GE_DEPTH_OFF 0x04 | |
25 | #define GE_HIGHCOLOR_OFF 0x08 | |
26 | #define GE_ROPCODE_OFF 0x14 | |
27 | #define GE_FIRE_OFF 0x18 | |
28 | #define GE_SRCBASE_OFF 0x20 | |
29 | #define GE_SRCDISPW_OFF 0x24 | |
30 | #define GE_SRCDISPH_OFF 0x28 | |
31 | #define GE_SRCAREAX_OFF 0x2c | |
32 | #define GE_SRCAREAY_OFF 0x30 | |
33 | #define GE_SRCAREAW_OFF 0x34 | |
34 | #define GE_SRCAREAH_OFF 0x38 | |
35 | #define GE_DESTBASE_OFF 0x3c | |
36 | #define GE_DESTDISPW_OFF 0x40 | |
37 | #define GE_DESTDISPH_OFF 0x44 | |
38 | #define GE_DESTAREAX_OFF 0x48 | |
39 | #define GE_DESTAREAY_OFF 0x4c | |
40 | #define GE_DESTAREAW_OFF 0x50 | |
41 | #define GE_DESTAREAH_OFF 0x54 | |
42 | #define GE_PAT0C_OFF 0x88 /* Pattern 0 color */ | |
43 | #define GE_ENABLE_OFF 0xec | |
44 | #define GE_INTEN_OFF 0xf0 | |
45 | #define GE_STATUS_OFF 0xf8 | |
46 | ||
47 | static void __iomem *regbase; | |
48 | ||
49 | void wmt_ge_fillrect(struct fb_info *p, const struct fb_fillrect *rect) | |
50 | { | |
51 | unsigned long fg, pat; | |
52 | ||
53 | if (p->state != FBINFO_STATE_RUNNING) | |
54 | return; | |
55 | ||
56 | if (p->fix.visual == FB_VISUAL_TRUECOLOR || | |
57 | p->fix.visual == FB_VISUAL_DIRECTCOLOR) | |
58 | fg = ((u32 *) (p->pseudo_palette))[rect->color]; | |
59 | else | |
60 | fg = rect->color; | |
61 | ||
62 | pat = pixel_to_pat(p->var.bits_per_pixel, fg); | |
63 | ||
64 | if (p->fbops->fb_sync) | |
65 | p->fbops->fb_sync(p); | |
66 | ||
67 | writel(p->var.bits_per_pixel == 32 ? 3 : | |
68 | (p->var.bits_per_pixel == 8 ? 0 : 1), regbase + GE_DEPTH_OFF); | |
69 | writel(p->var.bits_per_pixel == 15 ? 1 : 0, regbase + GE_HIGHCOLOR_OFF); | |
70 | writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF); | |
71 | writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF); | |
72 | writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF); | |
73 | writel(rect->dx, regbase + GE_DESTAREAX_OFF); | |
74 | writel(rect->dy, regbase + GE_DESTAREAY_OFF); | |
75 | writel(rect->width - 1, regbase + GE_DESTAREAW_OFF); | |
76 | writel(rect->height - 1, regbase + GE_DESTAREAH_OFF); | |
77 | ||
78 | writel(pat, regbase + GE_PAT0C_OFF); | |
79 | writel(1, regbase + GE_COMMAND_OFF); | |
80 | writel(rect->rop == ROP_XOR ? 0x5a : 0xf0, regbase + GE_ROPCODE_OFF); | |
81 | writel(1, regbase + GE_FIRE_OFF); | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(wmt_ge_fillrect); | |
84 | ||
85 | void wmt_ge_copyarea(struct fb_info *p, const struct fb_copyarea *area) | |
86 | { | |
87 | if (p->state != FBINFO_STATE_RUNNING) | |
88 | return; | |
89 | ||
90 | if (p->fbops->fb_sync) | |
91 | p->fbops->fb_sync(p); | |
92 | ||
93 | writel(p->var.bits_per_pixel > 16 ? 3 : | |
94 | (p->var.bits_per_pixel > 8 ? 1 : 0), regbase + GE_DEPTH_OFF); | |
95 | ||
96 | writel(p->fix.smem_start, regbase + GE_SRCBASE_OFF); | |
97 | writel(p->var.xres_virtual - 1, regbase + GE_SRCDISPW_OFF); | |
98 | writel(p->var.yres_virtual - 1, regbase + GE_SRCDISPH_OFF); | |
99 | writel(area->sx, regbase + GE_SRCAREAX_OFF); | |
100 | writel(area->sy, regbase + GE_SRCAREAY_OFF); | |
101 | writel(area->width - 1, regbase + GE_SRCAREAW_OFF); | |
102 | writel(area->height - 1, regbase + GE_SRCAREAH_OFF); | |
103 | ||
104 | writel(p->fix.smem_start, regbase + GE_DESTBASE_OFF); | |
105 | writel(p->var.xres_virtual - 1, regbase + GE_DESTDISPW_OFF); | |
106 | writel(p->var.yres_virtual - 1, regbase + GE_DESTDISPH_OFF); | |
107 | writel(area->dx, regbase + GE_DESTAREAX_OFF); | |
108 | writel(area->dy, regbase + GE_DESTAREAY_OFF); | |
109 | writel(area->width - 1, regbase + GE_DESTAREAW_OFF); | |
110 | writel(area->height - 1, regbase + GE_DESTAREAH_OFF); | |
111 | ||
112 | writel(0xcc, regbase + GE_ROPCODE_OFF); | |
113 | writel(1, regbase + GE_COMMAND_OFF); | |
114 | writel(1, regbase + GE_FIRE_OFF); | |
115 | } | |
116 | EXPORT_SYMBOL_GPL(wmt_ge_copyarea); | |
117 | ||
118 | int wmt_ge_sync(struct fb_info *p) | |
119 | { | |
120 | int loops = 5000000; | |
121 | while ((readl(regbase + GE_STATUS_OFF) & 4) && --loops) | |
122 | cpu_relax(); | |
123 | return loops > 0 ? 0 : -EBUSY; | |
124 | } | |
125 | EXPORT_SYMBOL_GPL(wmt_ge_sync); | |
126 | ||
127 | static int __devinit wmt_ge_rops_probe(struct platform_device *pdev) | |
128 | { | |
129 | struct resource *res; | |
d6ff7d0f AC |
130 | |
131 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
132 | if (res == NULL) { | |
133 | dev_err(&pdev->dev, "no I/O memory resource defined\n"); | |
a7f53284 | 134 | return -ENODEV; |
d6ff7d0f AC |
135 | } |
136 | ||
137 | /* Only one ROP engine is presently supported. */ | |
138 | if (unlikely(regbase)) { | |
139 | WARN_ON(1); | |
140 | return -EBUSY; | |
141 | } | |
142 | ||
143 | regbase = ioremap(res->start, resource_size(res)); | |
144 | if (regbase == NULL) { | |
145 | dev_err(&pdev->dev, "failed to map I/O memory\n"); | |
a7f53284 | 146 | return -EBUSY; |
d6ff7d0f AC |
147 | } |
148 | ||
149 | writel(1, regbase + GE_ENABLE_OFF); | |
150 | printk(KERN_INFO "Enabled support for WMT GE raster acceleration\n"); | |
151 | ||
152 | return 0; | |
d6ff7d0f AC |
153 | } |
154 | ||
155 | static int __devexit wmt_ge_rops_remove(struct platform_device *pdev) | |
156 | { | |
157 | iounmap(regbase); | |
158 | return 0; | |
159 | } | |
160 | ||
e7b99537 TP |
161 | static const struct of_device_id wmt_dt_ids[] = { |
162 | { .compatible = "wm,prizm-ge-rops", }, | |
163 | { /* sentinel */ } | |
164 | }; | |
165 | ||
d6ff7d0f AC |
166 | static struct platform_driver wmt_ge_rops_driver = { |
167 | .probe = wmt_ge_rops_probe, | |
168 | .remove = __devexit_p(wmt_ge_rops_remove), | |
169 | .driver = { | |
170 | .owner = THIS_MODULE, | |
171 | .name = "wmt_ge_rops", | |
e7b99537 | 172 | .of_match_table = of_match_ptr(wmt_dt_ids), |
d6ff7d0f AC |
173 | }, |
174 | }; | |
175 | ||
4277f2c4 | 176 | module_platform_driver(wmt_ge_rops_driver); |
d6ff7d0f AC |
177 | |
178 | MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com"); | |
179 | MODULE_DESCRIPTION("Accelerators for raster operations using " | |
180 | "WonderMedia Graphics Engine"); | |
e7b99537 TP |
181 | MODULE_LICENSE("GPL v2"); |
182 | MODULE_DEVICE_TABLE(of, wmt_dt_ids); |