2 * Arm PrimeCell PL110 Color LCD Controller
4 * Copyright (c) 2005-2009 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GNU LGPL
10 #include "qemu/osdep.h"
11 #include "hw/sysbus.h"
12 #include "ui/console.h"
13 #include "framebuffer.h"
14 #include "ui/pixel_ops.h"
15 #include "qemu/timer.h"
17 #include "qemu/module.h"
19 #define PL110_CR_EN 0x001
20 #define PL110_CR_BGR 0x100
21 #define PL110_CR_BEBO 0x200
22 #define PL110_CR_BEPO 0x400
23 #define PL110_CR_PWR 0x800
24 #define PL110_IE_NB 0x004
25 #define PL110_IE_VC 0x008
35 BPP_16_565, /* PL111 only */
36 BPP_12 /* PL111 only */
40 /* The Versatile/PB uses a slightly modified PL110 controller. */
48 #define TYPE_PL110 "pl110"
49 #define PL110(obj) OBJECT_CHECK(PL110State, (obj), TYPE_PL110)
51 typedef struct PL110State {
52 SysBusDevice parent_obj;
55 MemoryRegionSection fbsection;
57 QEMUTimer *vblank_timer;
68 enum pl110_bppmode bpp;
71 uint32_t palette[256];
72 uint32_t raw_palette[128];
76 static int vmstate_pl110_post_load(void *opaque, int version_id);
78 static const VMStateDescription vmstate_pl110 = {
81 .minimum_version_id = 1,
82 .post_load = vmstate_pl110_post_load,
83 .fields = (VMStateField[]) {
84 VMSTATE_INT32(version, PL110State),
85 VMSTATE_UINT32_ARRAY(timing, PL110State, 4),
86 VMSTATE_UINT32(cr, PL110State),
87 VMSTATE_UINT32(upbase, PL110State),
88 VMSTATE_UINT32(lpbase, PL110State),
89 VMSTATE_UINT32(int_status, PL110State),
90 VMSTATE_UINT32(int_mask, PL110State),
91 VMSTATE_INT32(cols, PL110State),
92 VMSTATE_INT32(rows, PL110State),
93 VMSTATE_UINT32(bpp, PL110State),
94 VMSTATE_INT32(invalidate, PL110State),
95 VMSTATE_UINT32_ARRAY(palette, PL110State, 256),
96 VMSTATE_UINT32_ARRAY(raw_palette, PL110State, 128),
97 VMSTATE_UINT32_V(mux_ctrl, PL110State, 2),
102 static const unsigned char pl110_id[] =
103 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
105 static const unsigned char pl111_id[] = {
106 0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
110 /* Indexed by pl110_version */
111 static const unsigned char *idregs[] = {
113 /* The ARM documentation (DDI0224C) says the CLCDC on the Versatile board
114 * has a different ID (0x93, 0x10, 0x04, 0x00, ...). However the hardware
115 * itself has the same ID values as a stock PL110, and guests (in
116 * particular Linux) rely on this. We emulate what the hardware does,
117 * rather than what the docs claim it ought to do.
124 #include "pl110_template.h"
126 #include "pl110_template.h"
128 #include "pl110_template.h"
130 #include "pl110_template.h"
132 #include "pl110_template.h"
134 static int pl110_enabled(PL110State *s)
136 return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
139 static void pl110_update_display(void *opaque)
141 PL110State *s = (PL110State *)opaque;
143 DisplaySurface *surface = qemu_console_surface(s->con);
152 if (!pl110_enabled(s)) {
156 sbd = SYS_BUS_DEVICE(s);
158 switch (surface_bits_per_pixel(surface)) {
162 fntable = pl110_draw_fn_8;
166 fntable = pl110_draw_fn_15;
170 fntable = pl110_draw_fn_16;
174 fntable = pl110_draw_fn_24;
178 fntable = pl110_draw_fn_32;
182 fprintf(stderr, "pl110: Bad color depth\n");
185 if (s->cr & PL110_CR_BGR)
190 if ((s->version != PL111) && (s->bpp == BPP_16)) {
191 /* The PL110's native 16 bit mode is 5551; however
192 * most boards with a PL110 implement an external
193 * mux which allows bits to be reshuffled to give
194 * 565 format. The mux is typically controlled by
195 * an external system register.
196 * This is controlled by a GPIO input pin
197 * so boards can wire it up to their register.
199 * The PL111 straightforwardly implements both
200 * 5551 and 565 under control of the bpp field
201 * in the LCDControl register.
203 switch (s->mux_ctrl) {
204 case 3: /* 565 BGR */
205 bpp_offset = (BPP_16_565 - BPP_16);
209 case 0: /* 888; also if we have loaded vmstate from an old version */
210 case 2: /* 565 RGB */
212 /* treat as 565 but honour BGR bit */
213 bpp_offset += (BPP_16_565 - BPP_16);
218 if (s->cr & PL110_CR_BEBO)
219 fn = fntable[s->bpp + 8 + bpp_offset];
220 else if (s->cr & PL110_CR_BEPO)
221 fn = fntable[s->bpp + 16 + bpp_offset];
223 fn = fntable[s->bpp + bpp_offset];
247 dest_width *= s->cols;
250 framebuffer_update_memory_section(&s->fbsection,
251 sysbus_address_space(sbd),
256 framebuffer_update_display(surface, &s->fbsection,
258 src_width, dest_width, 0,
264 dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1);
269 static void pl110_invalidate_display(void * opaque)
271 PL110State *s = (PL110State *)opaque;
273 if (pl110_enabled(s)) {
274 qemu_console_resize(s->con, s->cols, s->rows);
278 static void pl110_update_palette(PL110State *s, int n)
280 DisplaySurface *surface = qemu_console_surface(s->con);
283 unsigned int r, g, b;
285 raw = s->raw_palette[n];
287 for (i = 0; i < 2; i++) {
288 r = (raw & 0x1f) << 3;
290 g = (raw & 0x1f) << 3;
292 b = (raw & 0x1f) << 3;
293 /* The I bit is ignored. */
295 switch (surface_bits_per_pixel(surface)) {
297 s->palette[n] = rgb_to_pixel8(r, g, b);
300 s->palette[n] = rgb_to_pixel15(r, g, b);
303 s->palette[n] = rgb_to_pixel16(r, g, b);
307 s->palette[n] = rgb_to_pixel32(r, g, b);
314 static void pl110_resize(PL110State *s, int width, int height)
316 if (width != s->cols || height != s->rows) {
317 if (pl110_enabled(s)) {
318 qemu_console_resize(s->con, width, height);
325 /* Update interrupts. */
326 static void pl110_update(PL110State *s)
328 /* Raise IRQ if enabled and any status bit is 1 */
329 if (s->int_status & s->int_mask) {
330 qemu_irq_raise(s->irq);
332 qemu_irq_lower(s->irq);
336 static void pl110_vblank_interrupt(void *opaque)
338 PL110State *s = opaque;
340 /* Fire the vertical compare and next base IRQs and re-arm */
341 s->int_status |= (PL110_IE_NB | PL110_IE_VC);
342 timer_mod(s->vblank_timer,
343 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
344 NANOSECONDS_PER_SECOND / 60);
348 static uint64_t pl110_read(void *opaque, hwaddr offset,
351 PL110State *s = (PL110State *)opaque;
353 if (offset >= 0xfe0 && offset < 0x1000) {
354 return idregs[s->version][(offset - 0xfe0) >> 2];
356 if (offset >= 0x200 && offset < 0x400) {
357 return s->raw_palette[(offset - 0x200) >> 2];
359 switch (offset >> 2) {
360 case 0: /* LCDTiming0 */
362 case 1: /* LCDTiming1 */
364 case 2: /* LCDTiming2 */
366 case 3: /* LCDTiming3 */
368 case 4: /* LCDUPBASE */
370 case 5: /* LCDLPBASE */
372 case 6: /* LCDIMSC */
373 if (s->version != PL110) {
377 case 7: /* LCDControl */
378 if (s->version != PL110) {
383 return s->int_status;
385 return s->int_status & s->int_mask;
386 case 11: /* LCDUPCURR */
387 /* TODO: Implement vertical refresh. */
389 case 12: /* LCDLPCURR */
392 qemu_log_mask(LOG_GUEST_ERROR,
393 "pl110_read: Bad offset %x\n", (int)offset);
398 static void pl110_write(void *opaque, hwaddr offset,
399 uint64_t val, unsigned size)
401 PL110State *s = (PL110State *)opaque;
404 /* For simplicity invalidate the display whenever a control register
407 if (offset >= 0x200 && offset < 0x400) {
409 n = (offset - 0x200) >> 2;
410 s->raw_palette[(offset - 0x200) >> 2] = val;
411 pl110_update_palette(s, n);
414 switch (offset >> 2) {
415 case 0: /* LCDTiming0 */
417 n = ((val & 0xfc) + 4) * 4;
418 pl110_resize(s, n, s->rows);
420 case 1: /* LCDTiming1 */
422 n = (val & 0x3ff) + 1;
423 pl110_resize(s, s->cols, n);
425 case 2: /* LCDTiming2 */
428 case 3: /* LCDTiming3 */
431 case 4: /* LCDUPBASE */
434 case 5: /* LCDLPBASE */
437 case 6: /* LCDIMSC */
438 if (s->version != PL110) {
445 case 7: /* LCDControl */
446 if (s->version != PL110) {
451 s->bpp = (val >> 1) & 7;
452 if (pl110_enabled(s)) {
453 qemu_console_resize(s->con, s->cols, s->rows);
454 timer_mod(s->vblank_timer,
455 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
456 NANOSECONDS_PER_SECOND / 60);
458 timer_del(s->vblank_timer);
461 case 10: /* LCDICR */
462 s->int_status &= ~val;
466 qemu_log_mask(LOG_GUEST_ERROR,
467 "pl110_write: Bad offset %x\n", (int)offset);
471 static const MemoryRegionOps pl110_ops = {
473 .write = pl110_write,
474 .endianness = DEVICE_NATIVE_ENDIAN,
477 static void pl110_mux_ctrl_set(void *opaque, int line, int level)
479 PL110State *s = (PL110State *)opaque;
483 static int vmstate_pl110_post_load(void *opaque, int version_id)
485 PL110State *s = opaque;
486 /* Make sure we redraw, and at the right size */
487 pl110_invalidate_display(s);
491 static const GraphicHwOps pl110_gfx_ops = {
492 .invalidate = pl110_invalidate_display,
493 .gfx_update = pl110_update_display,
496 static void pl110_realize(DeviceState *dev, Error **errp)
498 PL110State *s = PL110(dev);
499 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
501 memory_region_init_io(&s->iomem, OBJECT(s), &pl110_ops, s, "pl110", 0x1000);
502 sysbus_init_mmio(sbd, &s->iomem);
503 sysbus_init_irq(sbd, &s->irq);
504 s->vblank_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
505 pl110_vblank_interrupt, s);
506 qdev_init_gpio_in(dev, pl110_mux_ctrl_set, 1);
507 s->con = graphic_console_init(dev, 0, &pl110_gfx_ops, s);
510 static void pl110_init(Object *obj)
512 PL110State *s = PL110(obj);
517 static void pl110_versatile_init(Object *obj)
519 PL110State *s = PL110(obj);
521 s->version = PL110_VERSATILE;
524 static void pl111_init(Object *obj)
526 PL110State *s = PL110(obj);
531 static void pl110_class_init(ObjectClass *klass, void *data)
533 DeviceClass *dc = DEVICE_CLASS(klass);
535 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
536 dc->vmsd = &vmstate_pl110;
537 dc->realize = pl110_realize;
540 static const TypeInfo pl110_info = {
542 .parent = TYPE_SYS_BUS_DEVICE,
543 .instance_size = sizeof(PL110State),
544 .instance_init = pl110_init,
545 .class_init = pl110_class_init,
548 static const TypeInfo pl110_versatile_info = {
549 .name = "pl110_versatile",
550 .parent = TYPE_PL110,
551 .instance_init = pl110_versatile_init,
554 static const TypeInfo pl111_info = {
556 .parent = TYPE_PL110,
557 .instance_init = pl111_init,
560 static void pl110_register_types(void)
562 type_register_static(&pl110_info);
563 type_register_static(&pl110_versatile_info);
564 type_register_static(&pl111_info);
567 type_init(pl110_register_types)