summaryrefslogtreecommitdiff
path: root/hw/g364fb.c
blob: 0c0c8ba3028e01c07e661a75e4e96120c6abef84 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
/*
 * QEMU G364 framebuffer Emulator.
 *
 * Copyright (c) 2007-2011 Herve Poussineau
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "hw.h"
#include "ui/console.h"
#include "ui/pixel_ops.h"
#include "trace.h"
#include "sysbus.h"

typedef struct G364State {
    /* hardware */
    uint8_t *vram;
    uint32_t vram_size;
    qemu_irq irq;
    MemoryRegion mem_vram;
    MemoryRegion mem_ctrl;
    /* registers */
    uint8_t color_palette[256][3];
    uint8_t cursor_palette[3][3];
    uint16_t cursor[512];
    uint32_t cursor_position;
    uint32_t ctla;
    uint32_t top_of_screen;
    uint32_t width, height; /* in pixels */
    /* display refresh support */
    DisplayState *ds;
    int depth;
    int blanked;
} G364State;

#define REG_BOOT     0x000000
#define REG_DISPLAY  0x000118
#define REG_VDISPLAY 0x000150
#define REG_CTLA     0x000300
#define REG_TOP      0x000400
#define REG_CURS_PAL 0x000508
#define REG_CURS_POS 0x000638
#define REG_CLR_PAL  0x000800
#define REG_CURS_PAT 0x001000
#define REG_RESET    0x100000

#define CTLA_FORCE_BLANK 0x00000400
#define CTLA_NO_CURSOR   0x00800000

#define G364_PAGE_SIZE 4096

static inline int check_dirty(G364State *s, ram_addr_t page)
{
    return memory_region_get_dirty(&s->mem_vram, page, G364_PAGE_SIZE,
                                   DIRTY_MEMORY_VGA);
}

static inline void reset_dirty(G364State *s,
                               ram_addr_t page_min, ram_addr_t page_max)
{
    memory_region_reset_dirty(&s->mem_vram,
                              page_min,
                              page_max + G364_PAGE_SIZE - page_min - 1,
                              DIRTY_MEMORY_VGA);
}

static void g364fb_draw_graphic8(G364State *s)
{
    int i, w;
    uint8_t *vram;
    uint8_t *data_display, *dd;
    ram_addr_t page, page_min, page_max;
    int x, y;
    int xmin, xmax;
    int ymin, ymax;
    int xcursor, ycursor;
    unsigned int (*rgb_to_pixel)(unsigned int r, unsigned int g, unsigned int b);

    switch (ds_get_bits_per_pixel(s->ds)) {
        case 8:
            rgb_to_pixel = rgb_to_pixel8;
            w = 1;
            break;
        case 15:
            rgb_to_pixel = rgb_to_pixel15;
            w = 2;
            break;
        case 16:
            rgb_to_pixel = rgb_to_pixel16;
            w = 2;
            break;
        case 32:
            rgb_to_pixel = rgb_to_pixel32;
            w = 4;
            break;
        default:
            hw_error("g364: unknown host depth %d",
                     ds_get_bits_per_pixel(s->ds));
            return;
    }

    page = 0;
    page_min = (ram_addr_t)-1;
    page_max = 0;

    x = y = 0;
    xmin = s->width;
    xmax = 0;
    ymin = s->height;
    ymax = 0;

    if (!(s->ctla & CTLA_NO_CURSOR)) {
        xcursor = s->cursor_position >> 12;
        ycursor = s->cursor_position & 0xfff;
    } else {
        xcursor = ycursor = -65;
    }

    vram = s->vram + s->top_of_screen;
    /* XXX: out of range in vram? */
    data_display = dd = ds_get_data(s->ds);
    while (y < s->height) {
        if (check_dirty(s, page)) {
            if (y < ymin)
                ymin = ymax = y;
            if (page_min == (ram_addr_t)-1)
                page_min = page;
            page_max = page;
            if (x < xmin)
                xmin = x;
            for (i = 0; i < G364_PAGE_SIZE; i++) {
                uint8_t index;
                unsigned int color;
                if (unlikely((y >= ycursor && y < ycursor + 64) &&
                    (x >= xcursor && x < xcursor + 64))) {
                    /* pointer area */
                    int xdiff = x - xcursor;
                    uint16_t curs = s->cursor[(y - ycursor) * 8 + xdiff / 8];
                    int op = (curs >> ((xdiff & 7) * 2)) & 3;
                    if (likely(op == 0)) {
                        /* transparent */
                        index = *vram;
                        color = (*rgb_to_pixel)(
                            s->color_palette[index][0],
                            s->color_palette[index][1],
                            s->color_palette[index][2]);
                    } else {
                        /* get cursor color */
                        index = op - 1;
                        color = (*rgb_to_pixel)(
                            s->cursor_palette[index][0],
                            s->cursor_palette[index][1],
                            s->cursor_palette[index][2]);
                    }
                } else {
                    /* normal area */
                    index = *vram;
                    color = (*rgb_to_pixel)(
                        s->color_palette[index][0],
                        s->color_palette[index][1],
                        s->color_palette[index][2]);
                }
                memcpy(dd, &color, w);
                dd += w;
                x++;
                vram++;
                if (x == s->width) {
                    xmax = s->width - 1;
                    y++;
                    if (y == s->height) {
                        ymax = s->height - 1;
                        goto done;
                    }
                    data_display = dd = data_display + ds_get_linesize(s->ds);
                    xmin = 0;
                    x = 0;
                }
            }
            if (x > xmax)
                xmax = x;
            if (y > ymax)
                ymax = y;
        } else {
            int dy;
            if (page_min != (ram_addr_t)-1) {
                reset_dirty(s, page_min, page_max);
                page_min = (ram_addr_t)-1;
                page_max = 0;
                dpy_gfx_update(s->ds, xmin, ymin,
                               xmax - xmin + 1, ymax - ymin + 1);
                xmin = s->width;
                xmax = 0;
                ymin = s->height;
                ymax = 0;
            }
            x += G364_PAGE_SIZE;
            dy = x / s->width;
            x = x % s->width;
            y += dy;
            vram += G364_PAGE_SIZE;
            data_display += dy * ds_get_linesize(s->ds);
            dd = data_display + x * w;
        }
        page += G364_PAGE_SIZE;
    }

done:
    if (page_min != (ram_addr_t)-1) {
        dpy_gfx_update(s->ds, xmin, ymin, xmax - xmin + 1, ymax - ymin + 1);
        reset_dirty(s, page_min, page_max);
    }
}

static void g364fb_draw_blank(G364State *s)
{
    int i, w;
    uint8_t *d;

    if (s->blanked) {
        /* Screen is already blank. No need to redraw it */
        return;
    }

    w = s->width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
    d = ds_get_data(s->ds);
    for (i = 0; i < s->height; i++) {
        memset(d, 0, w);
        d += ds_get_linesize(s->ds);
    }

    dpy_gfx_update(s->ds, 0, 0, s->width, s->height);
    s->blanked = 1;
}

static void g364fb_update_display(void *opaque)
{
    G364State *s = opaque;

    qemu_flush_coalesced_mmio_buffer();

    if (s->width == 0 || s->height == 0)
        return;

    if (s->width != ds_get_width(s->ds) || s->height != ds_get_height(s->ds)) {
        qemu_console_resize(s->ds, s->width, s->height);
    }

    if (s->ctla & CTLA_FORCE_BLANK) {
        g364fb_draw_blank(s);
    } else if (s->depth == 8) {
        g364fb_draw_graphic8(s);
    } else {
        error_report("g364: unknown guest depth %d", s->depth);
    }

    qemu_irq_raise(s->irq);
}

static inline void g364fb_invalidate_display(void *opaque)
{
    G364State *s = opaque;

    s->blanked = 0;
    memory_region_set_dirty(&s->mem_vram, 0, s->vram_size);
}

static void g364fb_reset(G364State *s)
{
    qemu_irq_lower(s->irq);

    memset(s->color_palette, 0, sizeof(s->color_palette));
    memset(s->cursor_palette, 0, sizeof(s->cursor_palette));
    memset(s->cursor, 0, sizeof(s->cursor));
    s->cursor_position = 0;
    s->ctla = 0;
    s->top_of_screen = 0;
    s->width = s->height = 0;
    memset(s->vram, 0, s->vram_size);
    g364fb_invalidate_display(s);
}

static void g364fb_screen_dump(void *opaque, const char *filename, bool cswitch,
                               Error **errp)
{
    G364State *s = opaque;
    int ret, y, x;
    uint8_t index;
    uint8_t *data_buffer;
    FILE *f;

    qemu_flush_coalesced_mmio_buffer();

    if (s->depth != 8) {
        error_setg(errp, "g364: unknown guest depth %d", s->depth);
        return;
    }

    f = fopen(filename, "wb");
    if (!f) {
        error_setg(errp, "failed to open file '%s': %s", filename,
                   strerror(errno));
        return;
    }

    if (s->ctla & CTLA_FORCE_BLANK) {
        /* blank screen */
        ret = fprintf(f, "P4\n%d %d\n", s->width, s->height);
        if (ret < 0) {
            goto write_err;
        }
        for (y = 0; y < s->height; y++)
            for (x = 0; x < s->width; x++) {
                ret = fputc(0, f);
                if (ret == EOF) {
                    goto write_err;
                }
            }
    } else {
        data_buffer = s->vram + s->top_of_screen;
        ret = fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
        if (ret < 0) {
            goto write_err;
        }
        for (y = 0; y < s->height; y++)
            for (x = 0; x < s->width; x++, data_buffer++) {
                index = *data_buffer;
                ret = fputc(s->color_palette[index][0], f);
                if (ret == EOF) {
                    goto write_err;
                }
                ret = fputc(s->color_palette[index][1], f);
                if (ret == EOF) {
                    goto write_err;
                }
                ret = fputc(s->color_palette[index][2], f);
                if (ret == EOF) {
                    goto write_err;
                }
        }
    }

out:
    fclose(f);
    return;

write_err:
    error_setg(errp, "failed to write to file '%s': %s", filename,
               strerror(errno));
    unlink(filename);
    goto out;
}

/* called for accesses to io ports */
static uint64_t g364fb_ctrl_read(void *opaque,
                                 hwaddr addr,
                                 unsigned int size)
{
    G364State *s = opaque;
    uint32_t val;

    if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
        /* cursor pattern */
        int idx = (addr - REG_CURS_PAT) >> 3;
        val = s->cursor[idx];
    } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
        /* cursor palette */
        int idx = (addr - REG_CURS_PAL) >> 3;
        val = ((uint32_t)s->cursor_palette[idx][0] << 16);
        val |= ((uint32_t)s->cursor_palette[idx][1] << 8);
        val |= ((uint32_t)s->cursor_palette[idx][2] << 0);
    } else {
        switch (addr) {
            case REG_DISPLAY:
                val = s->width / 4;
                break;
            case REG_VDISPLAY:
                val = s->height * 2;
                break;
            case REG_CTLA:
                val = s->ctla;
                break;
            default:
            {
                error_report("g364: invalid read at [" TARGET_FMT_plx "]",
                             addr);
                val = 0;
                break;
            }
        }
    }

    trace_g364fb_read(addr, val);

    return val;
}

static void g364fb_update_depth(G364State *s)
{
    static const int depths[8] = { 1, 2, 4, 8, 15, 16, 0 };
    s->depth = depths[(s->ctla & 0x00700000) >> 20];
}

static void g364_invalidate_cursor_position(G364State *s)
{
    int ymin, ymax, start, end;

    /* invalidate only near the cursor */
    ymin = s->cursor_position & 0xfff;
    ymax = MIN(s->height, ymin + 64);
    start = ymin * ds_get_linesize(s->ds);
    end = (ymax + 1) * ds_get_linesize(s->ds);

    memory_region_set_dirty(&s->mem_vram, start, end - start);
}

static void g364fb_ctrl_write(void *opaque,
                              hwaddr addr,
                              uint64_t val,
                              unsigned int size)
{
    G364State *s = opaque;

    trace_g364fb_write(addr, val);

    if (addr >= REG_CLR_PAL && addr < REG_CLR_PAL + 0x800) {
        /* color palette */
        int idx = (addr - REG_CLR_PAL) >> 3;
        s->color_palette[idx][0] = (val >> 16) & 0xff;
        s->color_palette[idx][1] = (val >> 8) & 0xff;
        s->color_palette[idx][2] = val & 0xff;
        g364fb_invalidate_display(s);
    } else if (addr >= REG_CURS_PAT && addr < REG_CURS_PAT + 0x1000) {
        /* cursor pattern */
        int idx = (addr - REG_CURS_PAT) >> 3;
        s->cursor[idx] = val;
        g364fb_invalidate_display(s);
    } else if (addr >= REG_CURS_PAL && addr < REG_CURS_PAL + 0x18) {
        /* cursor palette */
        int idx = (addr - REG_CURS_PAL) >> 3;
        s->cursor_palette[idx][0] = (val >> 16) & 0xff;
        s->cursor_palette[idx][1] = (val >> 8) & 0xff;
        s->cursor_palette[idx][2] = val & 0xff;
        g364fb_invalidate_display(s);
    } else {
        switch (addr) {
        case REG_BOOT: /* Boot timing */
        case 0x00108: /* Line timing: half sync */
        case 0x00110: /* Line timing: back porch */
        case 0x00120: /* Line timing: short display */
        case 0x00128: /* Frame timing: broad pulse */
        case 0x00130: /* Frame timing: v sync */
        case 0x00138: /* Frame timing: v preequalise */
        case 0x00140: /* Frame timing: v postequalise */
        case 0x00148: /* Frame timing: v blank */
        case 0x00158: /* Line timing: line time */
        case 0x00160: /* Frame store: line start */
        case 0x00168: /* vram cycle: mem init */
        case 0x00170: /* vram cycle: transfer delay */
        case 0x00200: /* vram cycle: mask register */
            /* ignore */
            break;
        case REG_TOP:
            s->top_of_screen = val;
            g364fb_invalidate_display(s);
            break;
        case REG_DISPLAY:
            s->width = val * 4;
            break;
        case REG_VDISPLAY:
            s->height = val / 2;
            break;
        case REG_CTLA:
            s->ctla = val;
            g364fb_update_depth(s);
            g364fb_invalidate_display(s);
            break;
        case REG_CURS_POS:
            g364_invalidate_cursor_position(s);
            s->cursor_position = val;
            g364_invalidate_cursor_position(s);
            break;
        case REG_RESET:
            g364fb_reset(s);
            break;
        default:
            error_report("g364: invalid write of 0x%" PRIx64
                         " at [" TARGET_FMT_plx "]", val, addr);
            break;
        }
    }
    qemu_irq_lower(s->irq);
}

static const MemoryRegionOps g364fb_ctrl_ops = {
    .read = g364fb_ctrl_read,
    .write = g364fb_ctrl_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
    .impl.min_access_size = 4,
    .impl.max_access_size = 4,
};

static int g364fb_post_load(void *opaque, int version_id)
{
    G364State *s = opaque;

    /* force refresh */
    g364fb_update_depth(s);
    g364fb_invalidate_display(s);

    return 0;
}

static const VMStateDescription vmstate_g364fb = {
    .name = "g364fb",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .post_load = g364fb_post_load,
    .fields = (VMStateField[]) {
        VMSTATE_VBUFFER_UINT32(vram, G364State, 1, NULL, 0, vram_size),
        VMSTATE_BUFFER_UNSAFE(color_palette, G364State, 0, 256 * 3),
        VMSTATE_BUFFER_UNSAFE(cursor_palette, G364State, 0, 9),
        VMSTATE_UINT16_ARRAY(cursor, G364State, 512),
        VMSTATE_UINT32(cursor_position, G364State),
        VMSTATE_UINT32(ctla, G364State),
        VMSTATE_UINT32(top_of_screen, G364State),
        VMSTATE_UINT32(width, G364State),
        VMSTATE_UINT32(height, G364State),
        VMSTATE_END_OF_LIST()
    }
};

static void g364fb_init(DeviceState *dev, G364State *s)
{
    s->vram = g_malloc0(s->vram_size);

    s->ds = graphic_console_init(g364fb_update_display,
                                 g364fb_invalidate_display,
                                 g364fb_screen_dump, NULL, s);

    memory_region_init_io(&s->mem_ctrl, &g364fb_ctrl_ops, s, "ctrl", 0x180000);
    memory_region_init_ram_ptr(&s->mem_vram, "vram",
                               s->vram_size, s->vram);
    vmstate_register_ram(&s->mem_vram, dev);
    memory_region_set_coalescing(&s->mem_vram);
}

typedef struct {
    SysBusDevice busdev;
    G364State g364;
} G364SysBusState;

static int g364fb_sysbus_init(SysBusDevice *dev)
{
    G364State *s = &FROM_SYSBUS(G364SysBusState, dev)->g364;

    g364fb_init(&dev->qdev, s);
    sysbus_init_irq(dev, &s->irq);
    sysbus_init_mmio(dev, &s->mem_ctrl);
    sysbus_init_mmio(dev, &s->mem_vram);

    return 0;
}

static void g364fb_sysbus_reset(DeviceState *d)
{
    G364SysBusState *s = DO_UPCAST(G364SysBusState, busdev.qdev, d);
    g364fb_reset(&s->g364);
}

static Property g364fb_sysbus_properties[] = {
    DEFINE_PROP_HEX32("vram_size", G364SysBusState, g364.vram_size,
    8 * 1024 * 1024),
    DEFINE_PROP_END_OF_LIST(),
};

static void g364fb_sysbus_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = g364fb_sysbus_init;
    dc->desc = "G364 framebuffer";
    dc->reset = g364fb_sysbus_reset;
    dc->vmsd = &vmstate_g364fb;
    dc->props = g364fb_sysbus_properties;
}

static const TypeInfo g364fb_sysbus_info = {
    .name          = "sysbus-g364",
    .parent        = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(G364SysBusState),
    .class_init    = g364fb_sysbus_class_init,
};

static void g364fb_register_types(void)
{
    type_register_static(&g364fb_sysbus_info);
}

type_init(g364fb_register_types)