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qemu/hw/display/pl110.c

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/*
* Arm PrimeCell PL110 Color LCD Controller
*
* Copyright (c) 2005-2009 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the GNU LGPL
*/
#include "hw/sysbus.h"
#include "ui/console.h"
#include "framebuffer.h"
#include "ui/pixel_ops.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,
BPP_16_565, /* PL111 only */
BPP_12 /* PL111 only */
};
/* The Versatile/PB uses a slightly modified PL110 controller. */
enum pl110_version
{
PL110,
PL110_VERSATILE,
PL111
};
#define TYPE_PL110 "pl110"
#define PL110(obj) OBJECT_CHECK(PL110State, (obj), TYPE_PL110)
typedef struct PL110State {
SysBusDevice parent_obj;
MemoryRegion iomem;
QemuConsole *con;
int version;
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 mux_ctrl;
uint32_t palette[256];
uint32_t raw_palette[128];
qemu_irq irq;
} PL110State;
static int vmstate_pl110_post_load(void *opaque, int version_id);
static const VMStateDescription vmstate_pl110 = {
.name = "pl110",
.version_id = 2,
.minimum_version_id = 1,
.post_load = vmstate_pl110_post_load,
.fields = (VMStateField[]) {
VMSTATE_INT32(version, PL110State),
VMSTATE_UINT32_ARRAY(timing, PL110State, 4),
VMSTATE_UINT32(cr, PL110State),
VMSTATE_UINT32(upbase, PL110State),
VMSTATE_UINT32(lpbase, PL110State),
VMSTATE_UINT32(int_status, PL110State),
VMSTATE_UINT32(int_mask, PL110State),
VMSTATE_INT32(cols, PL110State),
VMSTATE_INT32(rows, PL110State),
VMSTATE_UINT32(bpp, PL110State),
VMSTATE_INT32(invalidate, PL110State),
VMSTATE_UINT32_ARRAY(palette, PL110State, 256),
VMSTATE_UINT32_ARRAY(raw_palette, PL110State, 128),
VMSTATE_UINT32_V(mux_ctrl, PL110State, 2),
VMSTATE_END_OF_LIST()
}
};
static const unsigned char pl110_id[] =
{ 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
static const unsigned char pl111_id[] = {
0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
};
/* Indexed by pl110_version */
static const unsigned char *idregs[] = {
pl110_id,
/* The ARM documentation (DDI0224C) says the CLCDC on the Versatile board
* has a different ID (0x93, 0x10, 0x04, 0x00, ...). However the hardware
* itself has the same ID values as a stock PL110, and guests (in
* particular Linux) rely on this. We emulate what the hardware does,
* rather than what the docs claim it ought to do.
*/
pl110_id,
pl111_id
};
#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(PL110State *s)
{
return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
}
static void pl110_update_display(void *opaque)
{
PL110State *s = (PL110State *)opaque;
SysBusDevice *sbd;
DisplaySurface *surface = qemu_console_surface(s->con);
drawfn* fntable;
drawfn fn;
int dest_width;
int src_width;
int bpp_offset;
int first;
int last;
if (!pl110_enabled(s)) {
return;
}
sbd = SYS_BUS_DEVICE(s);
switch (surface_bits_per_pixel(surface)) {
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 = 24;
if ((s->version != PL111) && (s->bpp == BPP_16)) {
/* The PL110's native 16 bit mode is 5551; however
* most boards with a PL110 implement an external
* mux which allows bits to be reshuffled to give
* 565 format. The mux is typically controlled by
* an external system register.
* This is controlled by a GPIO input pin
* so boards can wire it up to their register.
*
* The PL111 straightforwardly implements both
* 5551 and 565 under control of the bpp field
* in the LCDControl register.
*/
switch (s->mux_ctrl) {
case 3: /* 565 BGR */
bpp_offset = (BPP_16_565 - BPP_16);
break;
case 1: /* 5551 */
break;
case 0: /* 888; also if we have loaded vmstate from an old version */
case 2: /* 565 RGB */
default:
/* treat as 565 but honour BGR bit */
bpp_offset += (BPP_16_565 - BPP_16);
break;
}
}
if (s->cr & PL110_CR_BEBO)
fn = fntable[s->bpp + 8 + bpp_offset];
else if (s->cr & PL110_CR_BEPO)
fn = fntable[s->bpp + 16 + 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:
case BPP_16_565:
case BPP_12:
src_width <<= 1;
break;
case BPP_32:
src_width <<= 2;
break;
}
dest_width *= s->cols;
first = 0;
framebuffer_update_display(surface, sysbus_address_space(sbd),
s->upbase, s->cols, s->rows,
src_width, dest_width, 0,
s->invalidate,
fn, s->palette,
&first, &last);
if (first >= 0) {
dpy_gfx_update(s->con, 0, first, s->cols, last - first + 1);
}
s->invalidate = 0;
}
static void pl110_invalidate_display(void * opaque)
{
PL110State *s = (PL110State *)opaque;
s->invalidate = 1;
if (pl110_enabled(s)) {
qemu_console_resize(s->con, s->cols, s->rows);
}
}
static void pl110_update_palette(PL110State *s, int n)
{
DisplaySurface *surface = qemu_console_surface(s->con);
int i;
uint32_t raw;
unsigned int r, g, b;
raw = s->raw_palette[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 (surface_bits_per_pixel(surface)) {
case 8:
s->palette[n] = rgb_to_pixel8(r, g, b);
break;
case 15:
s->palette[n] = rgb_to_pixel15(r, g, b);
break;
case 16:
s->palette[n] = rgb_to_pixel16(r, g, b);
break;
case 24:
case 32:
s->palette[n] = rgb_to_pixel32(r, g, b);
break;
}
n++;
}
}
static void pl110_resize(PL110State *s, int width, int height)
{
if (width != s->cols || height != s->rows) {
if (pl110_enabled(s)) {
qemu_console_resize(s->con, width, height);
}
}
s->cols = width;
s->rows = height;
}
/* Update interrupts. */
static void pl110_update(PL110State *s)
{
/* TODO: Implement interrupts. */
}
static uint64_t pl110_read(void *opaque, hwaddr offset,
unsigned size)
{
PL110State *s = (PL110State *)opaque;
if (offset >= 0xfe0 && offset < 0x1000) {
return idregs[s->version][(offset - 0xfe0) >> 2];
}
if (offset >= 0x200 && offset < 0x400) {
return s->raw_palette[(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->version != PL110) {
return s->cr;
}
return s->int_mask;
case 7: /* LCDControl */
if (s->version != PL110) {
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:
qemu_log_mask(LOG_GUEST_ERROR,
"pl110_read: Bad offset %x\n", (int)offset);
return 0;
}
}
static void pl110_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
PL110State *s = (PL110State *)opaque;
int n;
/* For simplicity invalidate the display whenever a control register
is written to. */
s->invalidate = 1;
if (offset >= 0x200 && offset < 0x400) {
/* Palette. */
n = (offset - 0x200) >> 2;
s->raw_palette[(offset - 0x200) >> 2] = val;
pl110_update_palette(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->version != PL110) {
goto control;
}
imsc:
s->int_mask = val;
pl110_update(s);
break;
case 7: /* LCDControl */
if (s->version != PL110) {
goto imsc;
}
control:
s->cr = val;
s->bpp = (val >> 1) & 7;
if (pl110_enabled(s)) {
qemu_console_resize(s->con, s->cols, s->rows);
}
break;
case 10: /* LCDICR */
s->int_status &= ~val;
pl110_update(s);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"pl110_write: Bad offset %x\n", (int)offset);
}
}
static const MemoryRegionOps pl110_ops = {
.read = pl110_read,
.write = pl110_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void pl110_mux_ctrl_set(void *opaque, int line, int level)
{
PL110State *s = (PL110State *)opaque;
s->mux_ctrl = level;
}
static int vmstate_pl110_post_load(void *opaque, int version_id)
{
PL110State *s = opaque;
/* Make sure we redraw, and at the right size */
pl110_invalidate_display(s);
return 0;
}
static const GraphicHwOps pl110_gfx_ops = {
.invalidate = pl110_invalidate_display,
.gfx_update = pl110_update_display,
};
static int pl110_initfn(SysBusDevice *sbd)
{
DeviceState *dev = DEVICE(sbd);
PL110State *s = PL110(dev);
memory_region_init_io(&s->iomem, OBJECT(s), &pl110_ops, s, "pl110", 0x1000);
sysbus_init_mmio(sbd, &s->iomem);
sysbus_init_irq(sbd, &s->irq);
qdev_init_gpio_in(dev, pl110_mux_ctrl_set, 1);
s->con = graphic_console_init(dev, 0, &pl110_gfx_ops, s);
return 0;
}
static void pl110_init(Object *obj)
{
PL110State *s = PL110(obj);
s->version = PL110;
}
static void pl110_versatile_init(Object *obj)
{
PL110State *s = PL110(obj);
s->version = PL110_VERSATILE;
}
static void pl111_init(Object *obj)
{
PL110State *s = PL110(obj);
s->version = PL111;
}
static void pl110_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
k->init = pl110_initfn;
set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
dc->vmsd = &vmstate_pl110;
}
static const TypeInfo pl110_info = {
.name = TYPE_PL110,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(PL110State),
.instance_init = pl110_init,
.class_init = pl110_class_init,
};
static const TypeInfo pl110_versatile_info = {
.name = "pl110_versatile",
.parent = TYPE_PL110,
.instance_init = pl110_versatile_init,
};
static const TypeInfo pl111_info = {
.name = "pl111",
.parent = TYPE_PL110,
.instance_init = pl111_init,
};
static void pl110_register_types(void)
{
type_register_static(&pl110_info);
type_register_static(&pl110_versatile_info);
type_register_static(&pl111_info);
}
type_init(pl110_register_types)
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