summaryrefslogtreecommitdiff
blob: 41ae88db200e2ec66d09b432f88a200a14e4fb13 (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
/*
 * Arm PrimeCell PL110 Color LCD Controller
 *
 * Copyright (c) 2005-2009 CodeSourcery.
 * Written by Paul Brook
 *
 * This code is licenced under the GNU LGPL
 */

#include "sysbus.h"
#include "console.h"
#include "framebuffer.h"

#define PL110_CR_EN   0x001
#define PL110_CR_BGR  0x100
#define PL110_CR_BEBO 0x200
#define PL110_CR_BEPO 0x400
#define PL110_CR_PWR  0x800

enum pl110_bppmode
{
    BPP_1,
    BPP_2,
    BPP_4,
    BPP_8,
    BPP_16,
    BPP_32
};

typedef struct {
    SysBusDevice busdev;
    DisplayState *ds;

    /* The Versatile/PB uses a slightly modified PL110 controller.  */
    int versatile;
    uint32_t timing[4];
    uint32_t cr;
    uint32_t upbase;
    uint32_t lpbase;
    uint32_t int_status;
    uint32_t int_mask;
    int cols;
    int rows;
    enum pl110_bppmode bpp;
    int invalidate;
    uint32_t pallette[256];
    uint32_t raw_pallette[128];
    qemu_irq irq;
} pl110_state;

static const unsigned char pl110_id[] =
{ 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };

/* The Arm documentation (DDI0224C) says the CLDC on the Versatile board
   has a different ID.  However Linux only looks for the normal ID.  */
#if 0
static const unsigned char pl110_versatile_id[] =
{ 0x93, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
#else
#define pl110_versatile_id pl110_id
#endif

#include "pixel_ops.h"

#define BITS 8
#include "pl110_template.h"
#define BITS 15
#include "pl110_template.h"
#define BITS 16
#include "pl110_template.h"
#define BITS 24
#include "pl110_template.h"
#define BITS 32
#include "pl110_template.h"

static int pl110_enabled(pl110_state *s)
{
  return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
}

static void pl110_update_display(void *opaque)
{
    pl110_state *s = (pl110_state *)opaque;
    drawfn* fntable;
    drawfn fn;
    int dest_width;
    int src_width;
    int bpp_offset;
    int first;
    int last;

    if (!pl110_enabled(s))
        return;

    switch (ds_get_bits_per_pixel(s->ds)) {
    case 0:
        return;
    case 8:
        fntable = pl110_draw_fn_8;
        dest_width = 1;
        break;
    case 15:
        fntable = pl110_draw_fn_15;
        dest_width = 2;
        break;
    case 16:
        fntable = pl110_draw_fn_16;
        dest_width = 2;
        break;
    case 24:
        fntable = pl110_draw_fn_24;
        dest_width = 3;
        break;
    case 32:
        fntable = pl110_draw_fn_32;
        dest_width = 4;
        break;
    default:
        fprintf(stderr, "pl110: Bad color depth\n");
        exit(1);
    }
    if (s->cr & PL110_CR_BGR)
        bpp_offset = 0;
    else
        bpp_offset = 18;

    if (s->cr & PL110_CR_BEBO)
        fn = fntable[s->bpp + 6 + bpp_offset];
    else if (s->cr & PL110_CR_BEPO)
        fn = fntable[s->bpp + 12 + bpp_offset];
    else
        fn = fntable[s->bpp + bpp_offset];

    src_width = s->cols;
    switch (s->bpp) {
    case BPP_1:
        src_width >>= 3;
        break;
    case BPP_2:
        src_width >>= 2;
        break;
    case BPP_4:
        src_width >>= 1;
        break;
    case BPP_8:
        break;
    case BPP_16:
        src_width <<= 1;
        break;
    case BPP_32:
        src_width <<= 2;
        break;
    }
    dest_width *= s->cols;
    first = 0;
    framebuffer_update_display(s->ds,
                               s->upbase, s->cols, s->rows,
                               src_width, dest_width, 0,
                               s->invalidate,
                               fn, s->pallette,
                               &first, &last);
    if (first >= 0) {
        dpy_update(s->ds, 0, first, s->cols, last - first + 1);
    }
    s->invalidate = 0;
}

static void pl110_invalidate_display(void * opaque)
{
    pl110_state *s = (pl110_state *)opaque;
    s->invalidate = 1;
    if (pl110_enabled(s)) {
        qemu_console_resize(s->ds, s->cols, s->rows);
    }
}

static void pl110_update_pallette(pl110_state *s, int n)
{
    int i;
    uint32_t raw;
    unsigned int r, g, b;

    raw = s->raw_pallette[n];
    n <<= 1;
    for (i = 0; i < 2; i++) {
        r = (raw & 0x1f) << 3;
        raw >>= 5;
        g = (raw & 0x1f) << 3;
        raw >>= 5;
        b = (raw & 0x1f) << 3;
        /* The I bit is ignored.  */
        raw >>= 6;
        switch (ds_get_bits_per_pixel(s->ds)) {
        case 8:
            s->pallette[n] = rgb_to_pixel8(r, g, b);
            break;
        case 15:
            s->pallette[n] = rgb_to_pixel15(r, g, b);
            break;
        case 16:
            s->pallette[n] = rgb_to_pixel16(r, g, b);
            break;
        case 24:
        case 32:
            s->pallette[n] = rgb_to_pixel32(r, g, b);
            break;
        }
        n++;
    }
}

static void pl110_resize(pl110_state *s, int width, int height)
{
    if (width != s->cols || height != s->rows) {
        if (pl110_enabled(s)) {
            qemu_console_resize(s->ds, width, height);
        }
    }
    s->cols = width;
    s->rows = height;
}

/* Update interrupts.  */
static void pl110_update(pl110_state *s)
{
  /* TODO: Implement interrupts.  */
}

static uint32_t pl110_read(void *opaque, a_target_phys_addr offset)
{
    pl110_state *s = (pl110_state *)opaque;

    if (offset >= 0xfe0 && offset < 0x1000) {
        if (s->versatile)
            return pl110_versatile_id[(offset - 0xfe0) >> 2];
        else
            return pl110_id[(offset - 0xfe0) >> 2];
    }
    if (offset >= 0x200 && offset < 0x400) {
        return s->raw_pallette[(offset - 0x200) >> 2];
    }
    switch (offset >> 2) {
    case 0: /* LCDTiming0 */
        return s->timing[0];
    case 1: /* LCDTiming1 */
        return s->timing[1];
    case 2: /* LCDTiming2 */
        return s->timing[2];
    case 3: /* LCDTiming3 */
        return s->timing[3];
    case 4: /* LCDUPBASE */
        return s->upbase;
    case 5: /* LCDLPBASE */
        return s->lpbase;
    case 6: /* LCDIMSC */
	if (s->versatile)
	  return s->cr;
        return s->int_mask;
    case 7: /* LCDControl */
	if (s->versatile)
	  return s->int_mask;
        return s->cr;
    case 8: /* LCDRIS */
        return s->int_status;
    case 9: /* LCDMIS */
        return s->int_status & s->int_mask;
    case 11: /* LCDUPCURR */
        /* TODO: Implement vertical refresh.  */
        return s->upbase;
    case 12: /* LCDLPCURR */
        return s->lpbase;
    default:
        hw_error("pl110_read: Bad offset %x\n", (int)offset);
        return 0;
    }
}

static void pl110_write(void *opaque, a_target_phys_addr offset,
                        uint32_t val)
{
    pl110_state *s = (pl110_state *)opaque;
    int n;

    /* For simplicity invalidate the display whenever a control register
       is writen to.  */
    s->invalidate = 1;
    if (offset >= 0x200 && offset < 0x400) {
        /* Pallette.  */
        n = (offset - 0x200) >> 2;
        s->raw_pallette[(offset - 0x200) >> 2] = val;
        pl110_update_pallette(s, n);
        return;
    }
    switch (offset >> 2) {
    case 0: /* LCDTiming0 */
        s->timing[0] = val;
        n = ((val & 0xfc) + 4) * 4;
        pl110_resize(s, n, s->rows);
        break;
    case 1: /* LCDTiming1 */
        s->timing[1] = val;
        n = (val & 0x3ff) + 1;
        pl110_resize(s, s->cols, n);
        break;
    case 2: /* LCDTiming2 */
        s->timing[2] = val;
        break;
    case 3: /* LCDTiming3 */
        s->timing[3] = val;
        break;
    case 4: /* LCDUPBASE */
        s->upbase = val;
        break;
    case 5: /* LCDLPBASE */
        s->lpbase = val;
        break;
    case 6: /* LCDIMSC */
        if (s->versatile)
            goto control;
    imsc:
        s->int_mask = val;
        pl110_update(s);
        break;
    case 7: /* LCDControl */
        if (s->versatile)
            goto imsc;
    control:
        s->cr = val;
        s->bpp = (val >> 1) & 7;
        if (pl110_enabled(s)) {
            qemu_console_resize(s->ds, s->cols, s->rows);
        }
        break;
    case 10: /* LCDICR */
        s->int_status &= ~val;
        pl110_update(s);
        break;
    default:
        hw_error("pl110_write: Bad offset %x\n", (int)offset);
    }
}

static CPUReadMemoryFunc * const pl110_readfn[] = {
   pl110_read,
   pl110_read,
   pl110_read
};

static CPUWriteMemoryFunc * const pl110_writefn[] = {
   pl110_write,
   pl110_write,
   pl110_write
};

static int pl110_init(SysBusDevice *dev)
{
    pl110_state *s = FROM_SYSBUS(pl110_state, dev);
    int iomemtype;

    iomemtype = cpu_register_io_memory(pl110_readfn,
                                       pl110_writefn, s);
    sysbus_init_mmio(dev, 0x1000, iomemtype);
    sysbus_init_irq(dev, &s->irq);
    s->ds = graphic_console_init(pl110_update_display,
                                 pl110_invalidate_display,
                                 NULL, NULL, s);
    /* ??? Save/restore.  */
    return 0;
}

static int pl110_versatile_init(SysBusDevice *dev)
{
    pl110_state *s = FROM_SYSBUS(pl110_state, dev);
    s->versatile = 1;
    return pl110_init(dev);
}

static void pl110_register_devices(void)
{
    sysbus_register_dev("pl110", sizeof(pl110_state), pl110_init);
    sysbus_register_dev("pl110_versatile", sizeof(pl110_state),
                        pl110_versatile_init);
}

device_init(pl110_register_devices)