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"
18 #define PL110_CR_EN 0x001
19 #define PL110_CR_BGR 0x100
20 #define PL110_CR_BEBO 0x200
21 #define PL110_CR_BEPO 0x400
22 #define PL110_CR_PWR 0x800
23 #define PL110_IE_NB 0x004
24 #define PL110_IE_VC 0x008
34 BPP_16_565, /* PL111 only */
35 BPP_12 /* PL111 only */
39 /* The Versatile/PB uses a slightly modified PL110 controller. */
47 #define TYPE_PL110 "pl110"
48 #define PL110(obj) OBJECT_CHECK(PL110State, (obj), TYPE_PL110)
50 typedef struct PL110State {
51 SysBusDevice parent_obj;
54 MemoryRegionSection fbsection;
56 QEMUTimer *vblank_timer;
67 enum pl110_bppmode bpp;
70 uint32_t palette[256];
71 uint32_t raw_palette[128];
75 static int vmstate_pl110_post_load(void *opaque, int version_id);
77 static const VMStateDescription vmstate_pl110 = {
80 .minimum_version_id = 1,
81 .post_load = vmstate_pl110_post_load,
82 .fields = (VMStateField[]) {
83 VMSTATE_INT32(version, PL110State),
84 VMSTATE_UINT32_ARRAY(timing, PL110State, 4),
85 VMSTATE_UINT32(cr, PL110State),
86 VMSTATE_UINT32(upbase, PL110State),
87 VMSTATE_UINT32(lpbase, PL110State),
88 VMSTATE_UINT32(int_status, PL110State),
89 VMSTATE_UINT32(int_mask, PL110State),
90 VMSTATE_INT32(cols, PL110State),
91 VMSTATE_INT32(rows, PL110State),
92 VMSTATE_UINT32(bpp, PL110State),
93 VMSTATE_INT32(invalidate, PL110State),
94 VMSTATE_UINT32_ARRAY(palette, PL110State, 256),
95 VMSTATE_UINT32_ARRAY(raw_palette, PL110State, 128),
96 VMSTATE_UINT32_V(mux_ctrl, PL110State, 2),
101 static const unsigned char pl110_id[] =
102 { 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
104 static const unsigned char pl111_id[] = {
105 0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
109 /* Indexed by pl110_version */
110 static const unsigned char *idregs[] = {
112 /* The ARM documentation (DDI0224C) says the CLCDC on the Versatile board
113 * has a different ID (0x93, 0x10, 0x04, 0x00, ...). However the hardware
114 * itself has the same ID values as a stock PL110, and guests (in
115 * particular Linux) rely on this. We emulate what the hardware does,
116 * rather than what the docs claim it ought to do.
123 #include "pl110_template.h"
125 #include "pl110_template.h"
127 #include "pl110_template.h"
129 #include "pl110_template.h"
131 #include "pl110_template.h"
133 static int pl110_enabled(PL110State *s)
135 return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
138 static void pl110_update_display(void *opaque)
140 PL110State *s = (PL110State *)opaque;
142 DisplaySurface *surface = qemu_console_surface(s->con);
151 if (!pl110_enabled(s)) {
155 sbd = SYS_BUS_DEVICE(s);
157 switch (surface_bits_per_pixel(surface)) {
161 fntable = pl110_draw_fn_8;
165 fntable = pl110_draw_fn_15;
169 fntable = pl110_draw_fn_16;
173 fntable = pl110_draw_fn_24;
177 fntable = pl110_draw_fn_32;
181 fprintf(stderr, "pl110: Bad color depth\n");
184 if (s->cr & PL110_CR_BGR)
189 if ((s->version != PL111) && (s->bpp == BPP_16)) {
190 /* The PL110's native 16 bit mode is 5551; however
191 * most boards with a PL110 implement an external
192 * mux which allows bits to be reshuffled to give
193 * 565 format. The mux is typically controlled by
194 * an external system register.
195 * This is controlled by a GPIO input pin
196 * so boards can wire it up to their register.
198 * The PL111 straightforwardly implements both
199 * 5551 and 565 under control of the bpp field
200 * in the LCDControl register.
202 switch (s->mux_ctrl) {
203 case 3: /* 565 BGR */
204 bpp_offset = (BPP_16_565 - BPP_16);
208 case 0: /* 888; also if we have loaded vmstate from an old version */
209 case 2: /* 565 RGB */
211 /* treat as 565 but honour BGR bit */
212 bpp_offset += (BPP_16_565 - BPP_16);
217 if (s->cr & PL110_CR_BEBO)
218 fn = fntable[s->bpp + 8 + bpp_offset];
219 else if (s->cr & PL110_CR_BEPO)
220 fn = fntable[s->bpp + 16 + bpp_offset];
222 fn = fntable[s->bpp + bpp_offset];
246 dest_width *= s->cols;
249 framebuffer_update_memory_section(&s->fbsection,
250 sysbus_address_space(sbd),
255 framebuffer_update_display(surface, &s->fbsection,
257 src_width, dest_width, 0,
263 dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1);
268 static void pl110_invalidate_display(void * opaque)
270 PL110State *s = (PL110State *)opaque;
272 if (pl110_enabled(s)) {
273 qemu_console_resize(s->con, s->cols, s->rows);
277 static void pl110_update_palette(PL110State *s, int n)
279 DisplaySurface *surface = qemu_console_surface(s->con);
282 unsigned int r, g, b;
284 raw = s->raw_palette[n];
286 for (i = 0; i < 2; i++) {
287 r = (raw & 0x1f) << 3;
289 g = (raw & 0x1f) << 3;
291 b = (raw & 0x1f) << 3;
292 /* The I bit is ignored. */
294 switch (surface_bits_per_pixel(surface)) {
296 s->palette[n] = rgb_to_pixel8(r, g, b);
299 s->palette[n] = rgb_to_pixel15(r, g, b);
302 s->palette[n] = rgb_to_pixel16(r, g, b);
306 s->palette[n] = rgb_to_pixel32(r, g, b);
313 static void pl110_resize(PL110State *s, int width, int height)
315 if (width != s->cols || height != s->rows) {
316 if (pl110_enabled(s)) {
317 qemu_console_resize(s->con, width, height);
324 /* Update interrupts. */
325 static void pl110_update(PL110State *s)
327 /* Raise IRQ if enabled and any status bit is 1 */
328 if (s->int_status & s->int_mask) {
329 qemu_irq_raise(s->irq);
331 qemu_irq_lower(s->irq);
335 static void pl110_vblank_interrupt(void *opaque)
337 PL110State *s = opaque;
339 /* Fire the vertical compare and next base IRQs and re-arm */
340 s->int_status |= (PL110_IE_NB | PL110_IE_VC);
341 timer_mod(s->vblank_timer,
342 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
343 NANOSECONDS_PER_SECOND / 60);
347 static uint64_t pl110_read(void *opaque, hwaddr offset,
350 PL110State *s = (PL110State *)opaque;
352 if (offset >= 0xfe0 && offset < 0x1000) {
353 return idregs[s->version][(offset - 0xfe0) >> 2];
355 if (offset >= 0x200 && offset < 0x400) {
356 return s->raw_palette[(offset - 0x200) >> 2];
358 switch (offset >> 2) {
359 case 0: /* LCDTiming0 */
361 case 1: /* LCDTiming1 */
363 case 2: /* LCDTiming2 */
365 case 3: /* LCDTiming3 */
367 case 4: /* LCDUPBASE */
369 case 5: /* LCDLPBASE */
371 case 6: /* LCDIMSC */
372 if (s->version != PL110) {
376 case 7: /* LCDControl */
377 if (s->version != PL110) {
382 return s->int_status;
384 return s->int_status & s->int_mask;
385 case 11: /* LCDUPCURR */
386 /* TODO: Implement vertical refresh. */
388 case 12: /* LCDLPCURR */
391 qemu_log_mask(LOG_GUEST_ERROR,
392 "pl110_read: Bad offset %x\n", (int)offset);
397 static void pl110_write(void *opaque, hwaddr offset,
398 uint64_t val, unsigned size)
400 PL110State *s = (PL110State *)opaque;
403 /* For simplicity invalidate the display whenever a control register
406 if (offset >= 0x200 && offset < 0x400) {
408 n = (offset - 0x200) >> 2;
409 s->raw_palette[(offset - 0x200) >> 2] = val;
410 pl110_update_palette(s, n);
413 switch (offset >> 2) {
414 case 0: /* LCDTiming0 */
416 n = ((val & 0xfc) + 4) * 4;
417 pl110_resize(s, n, s->rows);
419 case 1: /* LCDTiming1 */
421 n = (val & 0x3ff) + 1;
422 pl110_resize(s, s->cols, n);
424 case 2: /* LCDTiming2 */
427 case 3: /* LCDTiming3 */
430 case 4: /* LCDUPBASE */
433 case 5: /* LCDLPBASE */
436 case 6: /* LCDIMSC */
437 if (s->version != PL110) {
444 case 7: /* LCDControl */
445 if (s->version != PL110) {
450 s->bpp = (val >> 1) & 7;
451 if (pl110_enabled(s)) {
452 qemu_console_resize(s->con, s->cols, s->rows);
453 timer_mod(s->vblank_timer,
454 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
455 NANOSECONDS_PER_SECOND / 60);
457 timer_del(s->vblank_timer);
460 case 10: /* LCDICR */
461 s->int_status &= ~val;
465 qemu_log_mask(LOG_GUEST_ERROR,
466 "pl110_write: Bad offset %x\n", (int)offset);
470 static const MemoryRegionOps pl110_ops = {
472 .write = pl110_write,
473 .endianness = DEVICE_NATIVE_ENDIAN,
476 static void pl110_mux_ctrl_set(void *opaque, int line, int level)
478 PL110State *s = (PL110State *)opaque;
482 static int vmstate_pl110_post_load(void *opaque, int version_id)
484 PL110State *s = opaque;
485 /* Make sure we redraw, and at the right size */
486 pl110_invalidate_display(s);
490 static const GraphicHwOps pl110_gfx_ops = {
491 .invalidate = pl110_invalidate_display,
492 .gfx_update = pl110_update_display,
495 static void pl110_realize(DeviceState *dev, Error **errp)
497 PL110State *s = PL110(dev);
498 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
500 memory_region_init_io(&s->iomem, OBJECT(s), &pl110_ops, s, "pl110", 0x1000);
501 sysbus_init_mmio(sbd, &s->iomem);
502 sysbus_init_irq(sbd, &s->irq);
503 s->vblank_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
504 pl110_vblank_interrupt, s);
505 qdev_init_gpio_in(dev, pl110_mux_ctrl_set, 1);
506 s->con = graphic_console_init(dev, 0, &pl110_gfx_ops, s);
509 static void pl110_init(Object *obj)
511 PL110State *s = PL110(obj);
516 static void pl110_versatile_init(Object *obj)
518 PL110State *s = PL110(obj);
520 s->version = PL110_VERSATILE;
523 static void pl111_init(Object *obj)
525 PL110State *s = PL110(obj);
530 static void pl110_class_init(ObjectClass *klass, void *data)
532 DeviceClass *dc = DEVICE_CLASS(klass);
534 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
535 dc->vmsd = &vmstate_pl110;
536 dc->realize = pl110_realize;
539 static const TypeInfo pl110_info = {
541 .parent = TYPE_SYS_BUS_DEVICE,
542 .instance_size = sizeof(PL110State),
543 .instance_init = pl110_init,
544 .class_init = pl110_class_init,
547 static const TypeInfo pl110_versatile_info = {
548 .name = "pl110_versatile",
549 .parent = TYPE_PL110,
550 .instance_init = pl110_versatile_init,
553 static const TypeInfo pl111_info = {
555 .parent = TYPE_PL110,
556 .instance_init = pl111_init,
559 static void pl110_register_types(void)
561 type_register_static(&pl110_info);
562 type_register_static(&pl110_versatile_info);
563 type_register_static(&pl111_info);
566 type_init(pl110_register_types)