xref: /openbmc/qemu/hw/display/next-fb.c (revision c1966f51)
1 /*
2  * NeXT Cube/Station Framebuffer Emulation
3  *
4  * Copyright (c) 2011 Bryce Lanham
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "ui/console.h"
27 #include "hw/loader.h"
28 #include "framebuffer.h"
29 #include "ui/pixel_ops.h"
30 #include "hw/m68k/next-cube.h"
31 #include "qom/object.h"
32 
33 OBJECT_DECLARE_SIMPLE_TYPE(NeXTFbState, NEXTFB)
34 
35 struct NeXTFbState {
36     SysBusDevice parent_obj;
37 
38     MemoryRegion fb_mr;
39     MemoryRegionSection fbsection;
40     QemuConsole *con;
41 
42     uint32_t cols;
43     uint32_t rows;
44     int invalidate;
45 };
46 
nextfb_draw_line(void * opaque,uint8_t * d,const uint8_t * s,int width,int pitch)47 static void nextfb_draw_line(void *opaque, uint8_t *d, const uint8_t *s,
48                              int width, int pitch)
49 {
50     NeXTFbState *nfbstate = NEXTFB(opaque);
51     static const uint32_t pal[4] = {
52         0xFFFFFFFF, 0xFFAAAAAA, 0xFF555555, 0xFF000000
53     };
54     uint32_t *buf = (uint32_t *)d;
55     int i = 0;
56 
57     for (i = 0; i < nfbstate->cols / 4; i++) {
58         int j = i * 4;
59         uint8_t src = s[i];
60         buf[j + 3] = pal[src & 0x3];
61         src >>= 2;
62         buf[j + 2] = pal[src & 0x3];
63         src >>= 2;
64         buf[j + 1] = pal[src & 0x3];
65         src >>= 2;
66         buf[j + 0] = pal[src & 0x3];
67     }
68 }
69 
nextfb_update(void * opaque)70 static void nextfb_update(void *opaque)
71 {
72     NeXTFbState *s = NEXTFB(opaque);
73     int dest_width = 4;
74     int src_width;
75     int first = 0;
76     int last  = 0;
77     DisplaySurface *surface = qemu_console_surface(s->con);
78 
79     src_width = s->cols / 4 + 8;
80     dest_width = s->cols * 4;
81 
82     if (s->invalidate) {
83         framebuffer_update_memory_section(&s->fbsection, &s->fb_mr, 0,
84                                           s->cols, src_width);
85         s->invalidate = 0;
86     }
87 
88     framebuffer_update_display(surface, &s->fbsection, s->cols, s->rows,
89                                src_width, dest_width, 0, 1, nextfb_draw_line,
90                                s, &first, &last);
91 
92     dpy_gfx_update(s->con, 0, 0, s->cols, s->rows);
93 }
94 
nextfb_invalidate(void * opaque)95 static void nextfb_invalidate(void *opaque)
96 {
97     NeXTFbState *s = NEXTFB(opaque);
98     s->invalidate = 1;
99 }
100 
101 static const GraphicHwOps nextfb_ops = {
102     .invalidate  = nextfb_invalidate,
103     .gfx_update  = nextfb_update,
104 };
105 
nextfb_realize(DeviceState * dev,Error ** errp)106 static void nextfb_realize(DeviceState *dev, Error **errp)
107 {
108     NeXTFbState *s = NEXTFB(dev);
109 
110     memory_region_init_ram(&s->fb_mr, OBJECT(dev), "next-video", 0x1CB100,
111                            &error_fatal);
112     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->fb_mr);
113 
114     s->invalidate = 1;
115     s->cols = 1120;
116     s->rows = 832;
117 
118     s->con = graphic_console_init(dev, 0, &nextfb_ops, s);
119     qemu_console_resize(s->con, s->cols, s->rows);
120 }
121 
nextfb_class_init(ObjectClass * oc,void * data)122 static void nextfb_class_init(ObjectClass *oc, void *data)
123 {
124     DeviceClass *dc = DEVICE_CLASS(oc);
125 
126     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
127     dc->realize = nextfb_realize;
128 
129     /* Note: This device does not have any state that we have to reset or migrate */
130 }
131 
132 static const TypeInfo nextfb_info = {
133     .name          = TYPE_NEXTFB,
134     .parent        = TYPE_SYS_BUS_DEVICE,
135     .instance_size = sizeof(NeXTFbState),
136     .class_init    = nextfb_class_init,
137 };
138 
nextfb_register_types(void)139 static void nextfb_register_types(void)
140 {
141     type_register_static(&nextfb_info);
142 }
143 
144 type_init(nextfb_register_types)
145