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"
12 #include "hw/sysbus.h"
13 #include "migration/vmstate.h"
14 #include "ui/console.h"
15 #include "framebuffer.h"
16 #include "ui/pixel_ops.h"
17 #include "qemu/timer.h"
19 #include "qemu/module.h"
21 #define PL110_CR_EN 0x001
22 #define PL110_CR_BGR 0x100
23 #define PL110_CR_BEBO 0x200
24 #define PL110_CR_BEPO 0x400
25 #define PL110_CR_PWR 0x800
26 #define PL110_IE_NB 0x004
27 #define PL110_IE_VC 0x008
37 BPP_16_565, /* PL111 only */
38 BPP_12 /* PL111 only */
42 /* The Versatile/PB uses a slightly modified PL110 controller. */
50 #define TYPE_PL110 "pl110"
51 #define PL110(obj) OBJECT_CHECK(PL110State, (obj), TYPE_PL110)
53 typedef struct PL110State {
54 SysBusDevice parent_obj;
57 MemoryRegionSection fbsection;
59 QEMUTimer *vblank_timer;
70 enum pl110_bppmode bpp;
73 uint32_t palette[256];
74 uint32_t raw_palette[128];
78 static int vmstate_pl110_post_load(void *opaque, int version_id);
80 static const VMStateDescription vmstate_pl110 = {
83 .minimum_version_id = 1,
84 .post_load = vmstate_pl110_post_load,
85 .fields = (VMStateField[]) {
86 VMSTATE_INT32(version, PL110State),
87 VMSTATE_UINT32_ARRAY(timing, PL110State, 4),
88 VMSTATE_UINT32(cr, PL110State),
89 VMSTATE_UINT32(upbase, PL110State),
90 VMSTATE_UINT32(lpbase, PL110State),
91 VMSTATE_UINT32(int_status, PL110State),
92 VMSTATE_UINT32(int_mask, PL110State),
93 VMSTATE_INT32(cols, PL110State),
94 VMSTATE_INT32(rows, PL110State),
95 VMSTATE_UINT32(bpp, PL110State),
96 VMSTATE_INT32(invalidate, PL110State),
97 VMSTATE_UINT32_ARRAY(palette, PL110State, 256),
98 VMSTATE_UINT32_ARRAY(raw_palette, PL110State, 128),
99 VMSTATE_UINT32_V(mux_ctrl, PL110State, 2),
100 VMSTATE_END_OF_LIST()
104 static const unsigned char pl110_id[] =
105 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
107 static const unsigned char pl111_id[] = {
108 0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
112 /* Indexed by pl110_version */
113 static const unsigned char *idregs[] = {
115 /* The ARM documentation (DDI0224C) says the CLCDC on the Versatile board
116 * has a different ID (0x93, 0x10, 0x04, 0x00, ...). However the hardware
117 * itself has the same ID values as a stock PL110, and guests (in
118 * particular Linux) rely on this. We emulate what the hardware does,
119 * rather than what the docs claim it ought to do.
126 #include "pl110_template.h"
128 #include "pl110_template.h"
130 #include "pl110_template.h"
132 #include "pl110_template.h"
134 #include "pl110_template.h"
136 static int pl110_enabled(PL110State *s)
138 return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
141 static void pl110_update_display(void *opaque)
143 PL110State *s = (PL110State *)opaque;
145 DisplaySurface *surface = qemu_console_surface(s->con);
154 if (!pl110_enabled(s)) {
158 sbd = SYS_BUS_DEVICE(s);
160 switch (surface_bits_per_pixel(surface)) {
164 fntable = pl110_draw_fn_8;
168 fntable = pl110_draw_fn_15;
172 fntable = pl110_draw_fn_16;
176 fntable = pl110_draw_fn_24;
180 fntable = pl110_draw_fn_32;
184 fprintf(stderr, "pl110: Bad color depth\n");
187 if (s->cr & PL110_CR_BGR)
192 if ((s->version != PL111) && (s->bpp == BPP_16)) {
193 /* The PL110's native 16 bit mode is 5551; however
194 * most boards with a PL110 implement an external
195 * mux which allows bits to be reshuffled to give
196 * 565 format. The mux is typically controlled by
197 * an external system register.
198 * This is controlled by a GPIO input pin
199 * so boards can wire it up to their register.
201 * The PL111 straightforwardly implements both
202 * 5551 and 565 under control of the bpp field
203 * in the LCDControl register.
205 switch (s->mux_ctrl) {
206 case 3: /* 565 BGR */
207 bpp_offset = (BPP_16_565 - BPP_16);
211 case 0: /* 888; also if we have loaded vmstate from an old version */
212 case 2: /* 565 RGB */
214 /* treat as 565 but honour BGR bit */
215 bpp_offset += (BPP_16_565 - BPP_16);
220 if (s->cr & PL110_CR_BEBO)
221 fn = fntable[s->bpp + 8 + bpp_offset];
222 else if (s->cr & PL110_CR_BEPO)
223 fn = fntable[s->bpp + 16 + bpp_offset];
225 fn = fntable[s->bpp + bpp_offset];
249 dest_width *= s->cols;
252 framebuffer_update_memory_section(&s->fbsection,
253 sysbus_address_space(sbd),
258 framebuffer_update_display(surface, &s->fbsection,
260 src_width, dest_width, 0,
266 dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1);
271 static void pl110_invalidate_display(void * opaque)
273 PL110State *s = (PL110State *)opaque;
275 if (pl110_enabled(s)) {
276 qemu_console_resize(s->con, s->cols, s->rows);
280 static void pl110_update_palette(PL110State *s, int n)
282 DisplaySurface *surface = qemu_console_surface(s->con);
285 unsigned int r, g, b;
287 raw = s->raw_palette[n];
289 for (i = 0; i < 2; i++) {
290 r = (raw & 0x1f) << 3;
292 g = (raw & 0x1f) << 3;
294 b = (raw & 0x1f) << 3;
295 /* The I bit is ignored. */
297 switch (surface_bits_per_pixel(surface)) {
299 s->palette[n] = rgb_to_pixel8(r, g, b);
302 s->palette[n] = rgb_to_pixel15(r, g, b);
305 s->palette[n] = rgb_to_pixel16(r, g, b);
309 s->palette[n] = rgb_to_pixel32(r, g, b);
316 static void pl110_resize(PL110State *s, int width, int height)
318 if (width != s->cols || height != s->rows) {
319 if (pl110_enabled(s)) {
320 qemu_console_resize(s->con, width, height);
327 /* Update interrupts. */
328 static void pl110_update(PL110State *s)
330 /* Raise IRQ if enabled and any status bit is 1 */
331 if (s->int_status & s->int_mask) {
332 qemu_irq_raise(s->irq);
334 qemu_irq_lower(s->irq);
338 static void pl110_vblank_interrupt(void *opaque)
340 PL110State *s = opaque;
342 /* Fire the vertical compare and next base IRQs and re-arm */
343 s->int_status |= (PL110_IE_NB | PL110_IE_VC);
344 timer_mod(s->vblank_timer,
345 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
346 NANOSECONDS_PER_SECOND / 60);
350 static uint64_t pl110_read(void *opaque, hwaddr offset,
353 PL110State *s = (PL110State *)opaque;
355 if (offset >= 0xfe0 && offset < 0x1000) {
356 return idregs[s->version][(offset - 0xfe0) >> 2];
358 if (offset >= 0x200 && offset < 0x400) {
359 return s->raw_palette[(offset - 0x200) >> 2];
361 switch (offset >> 2) {
362 case 0: /* LCDTiming0 */
364 case 1: /* LCDTiming1 */
366 case 2: /* LCDTiming2 */
368 case 3: /* LCDTiming3 */
370 case 4: /* LCDUPBASE */
372 case 5: /* LCDLPBASE */
374 case 6: /* LCDIMSC */
375 if (s->version != PL110) {
379 case 7: /* LCDControl */
380 if (s->version != PL110) {
385 return s->int_status;
387 return s->int_status & s->int_mask;
388 case 11: /* LCDUPCURR */
389 /* TODO: Implement vertical refresh. */
391 case 12: /* LCDLPCURR */
394 qemu_log_mask(LOG_GUEST_ERROR,
395 "pl110_read: Bad offset %x\n", (int)offset);
400 static void pl110_write(void *opaque, hwaddr offset,
401 uint64_t val, unsigned size)
403 PL110State *s = (PL110State *)opaque;
406 /* For simplicity invalidate the display whenever a control register
409 if (offset >= 0x200 && offset < 0x400) {
411 n = (offset - 0x200) >> 2;
412 s->raw_palette[(offset - 0x200) >> 2] = val;
413 pl110_update_palette(s, n);
416 switch (offset >> 2) {
417 case 0: /* LCDTiming0 */
419 n = ((val & 0xfc) + 4) * 4;
420 pl110_resize(s, n, s->rows);
422 case 1: /* LCDTiming1 */
424 n = (val & 0x3ff) + 1;
425 pl110_resize(s, s->cols, n);
427 case 2: /* LCDTiming2 */
430 case 3: /* LCDTiming3 */
433 case 4: /* LCDUPBASE */
436 case 5: /* LCDLPBASE */
439 case 6: /* LCDIMSC */
440 if (s->version != PL110) {
447 case 7: /* LCDControl */
448 if (s->version != PL110) {
453 s->bpp = (val >> 1) & 7;
454 if (pl110_enabled(s)) {
455 qemu_console_resize(s->con, s->cols, s->rows);
456 timer_mod(s->vblank_timer,
457 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
458 NANOSECONDS_PER_SECOND / 60);
460 timer_del(s->vblank_timer);
463 case 10: /* LCDICR */
464 s->int_status &= ~val;
468 qemu_log_mask(LOG_GUEST_ERROR,
469 "pl110_write: Bad offset %x\n", (int)offset);
473 static const MemoryRegionOps pl110_ops = {
475 .write = pl110_write,
476 .endianness = DEVICE_NATIVE_ENDIAN,
479 static void pl110_mux_ctrl_set(void *opaque, int line, int level)
481 PL110State *s = (PL110State *)opaque;
485 static int vmstate_pl110_post_load(void *opaque, int version_id)
487 PL110State *s = opaque;
488 /* Make sure we redraw, and at the right size */
489 pl110_invalidate_display(s);
493 static const GraphicHwOps pl110_gfx_ops = {
494 .invalidate = pl110_invalidate_display,
495 .gfx_update = pl110_update_display,
498 static void pl110_realize(DeviceState *dev, Error **errp)
500 PL110State *s = PL110(dev);
501 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
503 memory_region_init_io(&s->iomem, OBJECT(s), &pl110_ops, s, "pl110", 0x1000);
504 sysbus_init_mmio(sbd, &s->iomem);
505 sysbus_init_irq(sbd, &s->irq);
506 s->vblank_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
507 pl110_vblank_interrupt, s);
508 qdev_init_gpio_in(dev, pl110_mux_ctrl_set, 1);
509 s->con = graphic_console_init(dev, 0, &pl110_gfx_ops, s);
512 static void pl110_init(Object *obj)
514 PL110State *s = PL110(obj);
519 static void pl110_versatile_init(Object *obj)
521 PL110State *s = PL110(obj);
523 s->version = PL110_VERSATILE;
526 static void pl111_init(Object *obj)
528 PL110State *s = PL110(obj);
533 static void pl110_class_init(ObjectClass *klass, void *data)
535 DeviceClass *dc = DEVICE_CLASS(klass);
537 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
538 dc->vmsd = &vmstate_pl110;
539 dc->realize = pl110_realize;
542 static const TypeInfo pl110_info = {
544 .parent = TYPE_SYS_BUS_DEVICE,
545 .instance_size = sizeof(PL110State),
546 .instance_init = pl110_init,
547 .class_init = pl110_class_init,
550 static const TypeInfo pl110_versatile_info = {
551 .name = "pl110_versatile",
552 .parent = TYPE_PL110,
553 .instance_init = pl110_versatile_init,
556 static const TypeInfo pl111_info = {
558 .parent = TYPE_PL110,
559 .instance_init = pl111_init,
562 static void pl110_register_types(void)
564 type_register_static(&pl110_info);
565 type_register_static(&pl110_versatile_info);
566 type_register_static(&pl111_info);
569 type_init(pl110_register_types)