diff options
Diffstat (limited to 'hw/display/cg3.c')
| -rw-r--r-- | hw/display/cg3.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/hw/display/cg3.c b/hw/display/cg3.c new file mode 100644 index 000000000..4b7e78d91 --- /dev/null +++ b/hw/display/cg3.c @@ -0,0 +1,396 @@ +/* + * QEMU CG3 Frame buffer + * + * Copyright (c) 2012 Bob Breuer + * Copyright (c) 2013 Mark Cave-Ayland + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "qemu/datadir.h" +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "ui/console.h" +#include "hw/sysbus.h" +#include "migration/vmstate.h" +#include "hw/irq.h" +#include "hw/loader.h" +#include "hw/qdev-properties.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "trace.h" +#include "qom/object.h" + +/* Change to 1 to enable debugging */ +#define DEBUG_CG3 0 + +#define CG3_ROM_FILE "QEMU,cgthree.bin" +#define FCODE_MAX_ROM_SIZE 0x10000 + +#define CG3_REG_SIZE 0x20 + +#define CG3_REG_BT458_ADDR 0x0 +#define CG3_REG_BT458_COLMAP 0x4 +#define CG3_REG_FBC_CTRL 0x10 +#define CG3_REG_FBC_STATUS 0x11 +#define CG3_REG_FBC_CURSTART 0x12 +#define CG3_REG_FBC_CUREND 0x13 +#define CG3_REG_FBC_VCTRL 0x14 + +/* Control register flags */ +#define CG3_CR_ENABLE_INTS 0x80 + +/* Status register flags */ +#define CG3_SR_PENDING_INT 0x80 +#define CG3_SR_1152_900_76_B 0x60 +#define CG3_SR_ID_COLOR 0x01 + +#define CG3_VRAM_SIZE 0x100000 +#define CG3_VRAM_OFFSET 0x800000 + +#define TYPE_CG3 "cgthree" +OBJECT_DECLARE_SIMPLE_TYPE(CG3State, CG3) + +struct CG3State { + SysBusDevice parent_obj; + + QemuConsole *con; + qemu_irq irq; + hwaddr prom_addr; + MemoryRegion vram_mem; + MemoryRegion rom; + MemoryRegion reg; + uint32_t vram_size; + int full_update; + uint8_t regs[16]; + uint8_t r[256], g[256], b[256]; + uint16_t width, height, depth; + uint8_t dac_index, dac_state; +}; + +static void cg3_update_display(void *opaque) +{ + CG3State *s = opaque; + DisplaySurface *surface = qemu_console_surface(s->con); + const uint8_t *pix; + uint32_t *data; + uint32_t dval; + int x, y, y_start; + unsigned int width, height; + ram_addr_t page; + DirtyBitmapSnapshot *snap = NULL; + + if (surface_bits_per_pixel(surface) != 32) { + return; + } + width = s->width; + height = s->height; + + y_start = -1; + pix = memory_region_get_ram_ptr(&s->vram_mem); + data = (uint32_t *)surface_data(surface); + + if (!s->full_update) { + snap = memory_region_snapshot_and_clear_dirty(&s->vram_mem, 0x0, + memory_region_size(&s->vram_mem), + DIRTY_MEMORY_VGA); + } + + for (y = 0; y < height; y++) { + int update; + + page = (ram_addr_t)y * width; + + if (s->full_update) { + update = 1; + } else { + update = memory_region_snapshot_get_dirty(&s->vram_mem, snap, page, + width); + } + + if (update) { + if (y_start < 0) { + y_start = y; + } + + for (x = 0; x < width; x++) { + dval = *pix++; + dval = (s->r[dval] << 16) | (s->g[dval] << 8) | s->b[dval]; + *data++ = dval; + } + } else { + if (y_start >= 0) { + dpy_gfx_update(s->con, 0, y_start, width, y - y_start); + y_start = -1; + } + pix += width; + data += width; + } + } + s->full_update = 0; + if (y_start >= 0) { + dpy_gfx_update(s->con, 0, y_start, width, y - y_start); + } + /* vsync interrupt? */ + if (s->regs[0] & CG3_CR_ENABLE_INTS) { + s->regs[1] |= CG3_SR_PENDING_INT; + qemu_irq_raise(s->irq); + } + g_free(snap); +} + +static void cg3_invalidate_display(void *opaque) +{ + CG3State *s = opaque; + + memory_region_set_dirty(&s->vram_mem, 0, CG3_VRAM_SIZE); +} + +static uint64_t cg3_reg_read(void *opaque, hwaddr addr, unsigned size) +{ + CG3State *s = opaque; + int val; + + switch (addr) { + case CG3_REG_BT458_ADDR: + case CG3_REG_BT458_COLMAP: + val = 0; + break; + case CG3_REG_FBC_CTRL: + val = s->regs[0]; + break; + case CG3_REG_FBC_STATUS: + /* monitor ID 6, board type = 1 (color) */ + val = s->regs[1] | CG3_SR_1152_900_76_B | CG3_SR_ID_COLOR; + break; + case CG3_REG_FBC_CURSTART ... CG3_REG_SIZE - 1: + val = s->regs[addr - 0x10]; + break; + default: + qemu_log_mask(LOG_UNIMP, + "cg3: Unimplemented register read " + "reg 0x%" HWADDR_PRIx " size 0x%x\n", + addr, size); + val = 0; + break; + } + trace_cg3_read(addr, val, size); + + return val; +} + +static void cg3_reg_write(void *opaque, hwaddr addr, uint64_t val, + unsigned size) +{ + CG3State *s = opaque; + uint8_t regval; + int i; + + trace_cg3_write(addr, val, size); + switch (addr) { + case CG3_REG_BT458_ADDR: + s->dac_index = val; + s->dac_state = 0; + break; + case CG3_REG_BT458_COLMAP: + /* This register can be written to as either a long word or a byte */ + if (size == 1) { + val <<= 24; + } + + for (i = 0; i < size; i++) { + regval = val >> 24; + + switch (s->dac_state) { + case 0: + s->r[s->dac_index] = regval; + s->dac_state++; + break; + case 1: + s->g[s->dac_index] = regval; + s->dac_state++; + break; + case 2: + s->b[s->dac_index] = regval; + /* Index autoincrement */ + s->dac_index = (s->dac_index + 1) & 0xff; + /* fall through */ + default: + s->dac_state = 0; + break; + } + val <<= 8; + } + s->full_update = 1; + break; + case CG3_REG_FBC_CTRL: + s->regs[0] = val; + break; + case CG3_REG_FBC_STATUS: + if (s->regs[1] & CG3_SR_PENDING_INT) { + /* clear interrupt */ + s->regs[1] &= ~CG3_SR_PENDING_INT; + qemu_irq_lower(s->irq); + } + break; + case CG3_REG_FBC_CURSTART ... CG3_REG_SIZE - 1: + s->regs[addr - 0x10] = val; + break; + default: + qemu_log_mask(LOG_UNIMP, + "cg3: Unimplemented register write " + "reg 0x%" HWADDR_PRIx " size 0x%x value 0x%" PRIx64 "\n", + addr, size, val); + break; + } +} + +static const MemoryRegionOps cg3_reg_ops = { + .read = cg3_reg_read, + .write = cg3_reg_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 4, + }, +}; + +static const GraphicHwOps cg3_ops = { + .invalidate = cg3_invalidate_display, + .gfx_update = cg3_update_display, +}; + +static void cg3_initfn(Object *obj) +{ + SysBusDevice *sbd = SYS_BUS_DEVICE(obj); + CG3State *s = CG3(obj); + + memory_region_init_rom_nomigrate(&s->rom, obj, "cg3.prom", + FCODE_MAX_ROM_SIZE, &error_fatal); + sysbus_init_mmio(sbd, &s->rom); + + memory_region_init_io(&s->reg, obj, &cg3_reg_ops, s, "cg3.reg", + CG3_REG_SIZE); + sysbus_init_mmio(sbd, &s->reg); +} + +static void cg3_realizefn(DeviceState *dev, Error **errp) +{ + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + CG3State *s = CG3(dev); + int ret; + char *fcode_filename; + + /* FCode ROM */ + vmstate_register_ram_global(&s->rom); + fcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, CG3_ROM_FILE); + if (fcode_filename) { + ret = load_image_mr(fcode_filename, &s->rom); + g_free(fcode_filename); + if (ret < 0 || ret > FCODE_MAX_ROM_SIZE) { + warn_report("cg3: could not load prom '%s'", CG3_ROM_FILE); + } + } + + memory_region_init_ram(&s->vram_mem, NULL, "cg3.vram", s->vram_size, + &error_fatal); + memory_region_set_log(&s->vram_mem, true, DIRTY_MEMORY_VGA); + sysbus_init_mmio(sbd, &s->vram_mem); + + sysbus_init_irq(sbd, &s->irq); + + s->con = graphic_console_init(dev, 0, &cg3_ops, s); + qemu_console_resize(s->con, s->width, s->height); +} + +static int vmstate_cg3_post_load(void *opaque, int version_id) +{ + CG3State *s = opaque; + + cg3_invalidate_display(s); + + return 0; +} + +static const VMStateDescription vmstate_cg3 = { + .name = "cg3", + .version_id = 1, + .minimum_version_id = 1, + .post_load = vmstate_cg3_post_load, + .fields = (VMStateField[]) { + VMSTATE_UINT16(height, CG3State), + VMSTATE_UINT16(width, CG3State), + VMSTATE_UINT16(depth, CG3State), + VMSTATE_BUFFER(r, CG3State), + VMSTATE_BUFFER(g, CG3State), + VMSTATE_BUFFER(b, CG3State), + VMSTATE_UINT8(dac_index, CG3State), + VMSTATE_UINT8(dac_state, CG3State), + VMSTATE_END_OF_LIST() + } +}; + +static void cg3_reset(DeviceState *d) +{ + CG3State *s = CG3(d); + + /* Initialize palette */ + memset(s->r, 0, 256); + memset(s->g, 0, 256); + memset(s->b, 0, 256); + + s->dac_state = 0; + s->full_update = 1; + qemu_irq_lower(s->irq); +} + +static Property cg3_properties[] = { + DEFINE_PROP_UINT32("vram-size", CG3State, vram_size, -1), + DEFINE_PROP_UINT16("width", CG3State, width, -1), + DEFINE_PROP_UINT16("height", CG3State, height, -1), + DEFINE_PROP_UINT16("depth", CG3State, depth, -1), + DEFINE_PROP_END_OF_LIST(), +}; + +static void cg3_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = cg3_realizefn; + dc->reset = cg3_reset; + dc->vmsd = &vmstate_cg3; + device_class_set_props(dc, cg3_properties); +} + +static const TypeInfo cg3_info = { + .name = TYPE_CG3, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(CG3State), + .instance_init = cg3_initfn, + .class_init = cg3_class_init, +}; + +static void cg3_register_types(void) +{ + type_register_static(&cg3_info); +} + +type_init(cg3_register_types) |