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-rw-r--r--hw/syborg_fb.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/hw/syborg_fb.c b/hw/syborg_fb.c
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+++ b/hw/syborg_fb.c
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+/*
+ * Syborg Framebuffer
+ *
+ * Copyright (c) 2009 CodeSourcery
+ *
+ * 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 "sysbus.h"
+#include "console.h"
+#include "syborg.h"
+#include "framebuffer.h"
+
+//#define DEBUG_SYBORG_FB
+
+#ifdef DEBUG_SYBORG_FB
+#define DPRINTF(fmt, ...) \
+do { printf("syborg_fb: " fmt , ## __VA_ARGS__); } while (0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__); \
+ exit(1);} while (0)
+#else
+#define DPRINTF(fmt, ...) do {} while(0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__);} while (0)
+#endif
+
+enum {
+ FB_ID = 0,
+ FB_BASE = 1,
+ FB_HEIGHT = 2,
+ FB_WIDTH = 3,
+ FB_ORIENTATION = 4,
+ FB_BLANK = 5,
+ FB_INT_MASK = 6,
+ FB_INTERRUPT_CAUSE = 7,
+ FB_BPP = 8,
+ FB_COLOR_ORDER = 9,
+ FB_BYTE_ORDER = 10,
+ FB_PIXEL_ORDER = 11,
+ FB_ROW_PITCH = 12,
+ FB_ENABLED = 13,
+ FB_PALETTE_START = 0x400 >> 2,
+ FB_PALETTE_END = FB_PALETTE_START+256-1,
+};
+
+#define FB_INT_VSYNC (1U << 0)
+#define FB_INT_BASE_UPDATE_DONE (1U << 1)
+
+typedef struct {
+ SysBusDevice busdev;
+ DisplayState *ds;
+ /*QEMUConsole *console;*/
+ uint32_t need_update : 1;
+ uint32_t need_int : 1;
+ uint32_t enabled : 1;
+ uint32_t int_status;
+ uint32_t int_enable;
+ qemu_irq irq;
+
+ uint32_t base;
+ uint32_t pitch;
+ int rows;
+ int cols;
+ int blank;
+ int bpp;
+ int rgb; /* 0 = BGR, 1 = RGB */
+ int endian; /* 0 = Little, 1 = Big */
+ uint32_t raw_palette[256];
+ uint32_t palette[256];
+} SyborgFBState;
+
+enum {
+ BPP_SRC_1,
+ BPP_SRC_2,
+ BPP_SRC_4,
+ BPP_SRC_8,
+ BPP_SRC_16,
+ BPP_SRC_32,
+ /* TODO: Implement these. */
+ BPP_SRC_15 = -1,
+ BPP_SRC_24 = -2
+};
+
+#include "pixel_ops.h"
+
+#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"
+
+/* Update interrupts. */
+static void syborg_fb_update(SyborgFBState *s)
+{
+ if ((s->int_status & s->int_enable) != 0) {
+ DPRINTF("Raise IRQ\n");
+ qemu_irq_raise(s->irq);
+ } else {
+ DPRINTF("Lower IRQ\n");
+ qemu_irq_lower(s->irq);
+ }
+}
+
+static int syborg_fb_enabled(const SyborgFBState *s)
+{
+ return s->enabled;
+}
+
+static void syborg_fb_update_palette(SyborgFBState *s)
+{
+ int n, i;
+ uint32_t raw;
+ unsigned int r, g, b;
+
+ switch (s->bpp) {
+ case BPP_SRC_1: n = 2; break;
+ case BPP_SRC_2: n = 4; break;
+ case BPP_SRC_4: n = 16; break;
+ case BPP_SRC_8: n = 256; break;
+ default: return;
+ }
+
+ for (i = 0; i < n; i++) {
+ raw = s->raw_palette[i];
+ r = (raw >> 16) & 0xff;
+ g = (raw >> 8) & 0xff;
+ b = raw & 0xff;
+ switch (ds_get_bits_per_pixel(s->ds)) {
+ case 8:
+ s->palette[i] = rgb_to_pixel8(r, g, b);
+ break;
+ case 15:
+ s->palette[i] = rgb_to_pixel15(r, g, b);
+ break;
+ case 16:
+ s->palette[i] = rgb_to_pixel16(r, g, b);
+ break;
+ case 24:
+ case 32:
+ s->palette[i] = rgb_to_pixel32(r, g, b);
+ break;
+ default:
+ abort();
+ }
+ }
+
+}
+
+static void syborg_fb_update_display(void *opaque)
+{
+ SyborgFBState *s = (SyborgFBState *)opaque;
+ drawfn* fntable;
+ drawfn fn;
+ int dest_width;
+ int src_width;
+ int bpp_offset;
+ int first;
+ int last;
+
+ if (!syborg_fb_enabled(s))
+ return;
+
+ switch (ds_get_bits_per_pixel(s->ds)) {
+ 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, "syborg_fb: Bad color depth\n");
+ exit(1);
+ }
+
+ if (s->need_int) {
+ s->int_status |= FB_INT_BASE_UPDATE_DONE;
+ syborg_fb_update(s);
+ s->need_int = 0;
+ }
+
+ if (s->rgb) {
+ bpp_offset = 18;
+ } else {
+ bpp_offset = 0;
+ }
+ if (s->endian) {
+ bpp_offset += 6;
+ }
+
+ fn = fntable[s->bpp + bpp_offset];
+
+ if (s->pitch) {
+ src_width = s->pitch;
+ } else {
+ src_width = s->cols;
+ switch (s->bpp) {
+ case BPP_SRC_1:
+ src_width >>= 3;
+ break;
+ case BPP_SRC_2:
+ src_width >>= 2;
+ break;
+ case BPP_SRC_4:
+ src_width >>= 1;
+ break;
+ case BPP_SRC_8:
+ break;
+ case BPP_SRC_15:
+ case BPP_SRC_16:
+ src_width <<= 1;
+ break;
+ case BPP_SRC_24:
+ src_width *= 3;
+ break;
+ case BPP_SRC_32:
+ src_width <<= 2;
+ break;
+ }
+ }
+ dest_width *= s->cols;
+ first = 0;
+ /* TODO: Implement blanking. */
+ if (!s->blank) {
+ if (s->need_update && s->bpp <= BPP_SRC_8) {
+ syborg_fb_update_palette(s);
+ }
+ framebuffer_update_display(s->ds,
+ s->base, s->cols, s->rows,
+ src_width, dest_width, 0,
+ s->need_update,
+ fn, s->palette,
+ &first, &last);
+ if (first >= 0) {
+ dpy_update(s->ds, 0, first, s->cols, last - first + 1);
+ }
+
+ s->int_status |= FB_INT_VSYNC;
+ syborg_fb_update(s);
+ }
+
+ s->need_update = 0;
+}
+
+static void syborg_fb_invalidate_display(void * opaque)
+{
+ SyborgFBState *s = (SyborgFBState *)opaque;
+ s->need_update = 1;
+}
+
+static uint32_t syborg_fb_read(void *opaque, target_phys_addr_t offset)
+{
+ SyborgFBState *s = opaque;
+
+ DPRINTF("read reg %d\n", (int)offset);
+ offset &= 0xfff;
+ switch (offset >> 2) {
+ case FB_ID:
+ return SYBORG_ID_FRAMEBUFFER;
+
+ case FB_BASE:
+ return s->base;
+
+ case FB_HEIGHT:
+ return s->rows;
+
+ case FB_WIDTH:
+ return s->cols;
+
+ case FB_ORIENTATION:
+ return 0;
+
+ case FB_BLANK:
+ return s->blank;
+
+ case FB_INT_MASK:
+ return s->int_enable;
+
+ case FB_INTERRUPT_CAUSE:
+ return s->int_status;
+
+ case FB_BPP:
+ switch (s->bpp) {
+ case BPP_SRC_1: return 1;
+ case BPP_SRC_2: return 2;
+ case BPP_SRC_4: return 4;
+ case BPP_SRC_8: return 8;
+ case BPP_SRC_15: return 15;
+ case BPP_SRC_16: return 16;
+ case BPP_SRC_24: return 24;
+ case BPP_SRC_32: return 32;
+ default: return 0;
+ }
+
+ case FB_COLOR_ORDER:
+ return s->rgb;
+
+ case FB_BYTE_ORDER:
+ return s->endian;
+
+ case FB_PIXEL_ORDER:
+ return 0;
+
+ case FB_ROW_PITCH:
+ return s->pitch;
+
+ case FB_ENABLED:
+ return s->enabled;
+
+ default:
+ if ((offset >> 2) >= FB_PALETTE_START
+ && (offset >> 2) <= FB_PALETTE_END) {
+ return s->raw_palette[(offset >> 2) - FB_PALETTE_START];
+ } else {
+ cpu_abort (cpu_single_env, "syborg_fb_read: Bad offset %x\n",
+ (int)offset);
+ }
+ return 0;
+ }
+}
+
+static void syborg_fb_write(void *opaque, target_phys_addr_t offset,
+ uint32_t val)
+{
+ SyborgFBState *s = opaque;
+
+ DPRINTF("write reg %d = %d\n", (int)offset, val);
+ s->need_update = 1;
+ offset &= 0xfff;
+ switch (offset >> 2) {
+ case FB_BASE:
+ s->base = val;
+ s->need_int = 1;
+ s->need_update = 1;
+ syborg_fb_update(s);
+ break;
+
+ case FB_HEIGHT:
+ s->rows = val;
+ break;
+
+ case FB_WIDTH:
+ s->cols = val;
+ break;
+
+ case FB_ORIENTATION:
+ /* TODO: Implement rotation. */
+ break;
+
+ case FB_BLANK:
+ s->blank = val & 1;
+ break;
+
+ case FB_INT_MASK:
+ s->int_enable = val;
+ syborg_fb_update(s);
+ break;
+
+ case FB_INTERRUPT_CAUSE:
+ s->int_status &= ~val;
+ syborg_fb_update(s);
+ break;
+
+ case FB_BPP:
+ switch (val) {
+ case 1: val = BPP_SRC_1; break;
+ case 2: val = BPP_SRC_2; break;
+ case 4: val = BPP_SRC_4; break;
+ case 8: val = BPP_SRC_8; break;
+ /* case 15: val = BPP_SRC_15; break; */
+ case 16: val = BPP_SRC_16; break;
+ /* case 24: val = BPP_SRC_24; break; */
+ case 32: val = BPP_SRC_32; break;
+ default: val = s->bpp; break;
+ }
+ s->bpp = val;
+ break;
+
+ case FB_COLOR_ORDER:
+ s->rgb = (val != 0);
+ break;
+
+ case FB_BYTE_ORDER:
+ s->endian = (val != 0);
+ break;
+
+ case FB_PIXEL_ORDER:
+ /* TODO: Implement this. */
+ break;
+
+ case FB_ROW_PITCH:
+ s->pitch = val;
+ break;
+
+ case FB_ENABLED:
+ s->enabled = val;
+ break;
+
+ default:
+ if ((offset >> 2) >= FB_PALETTE_START
+ && (offset >> 2) <= FB_PALETTE_END) {
+ s->raw_palette[(offset >> 2) - FB_PALETTE_START] = val;
+ } else {
+ cpu_abort (cpu_single_env, "syborg_fb_write: Bad offset %x\n",
+ (int)offset);
+ }
+ break;
+ }
+}
+
+static CPUReadMemoryFunc *syborg_fb_readfn[] = {
+ syborg_fb_read,
+ syborg_fb_read,
+ syborg_fb_read
+};
+
+static CPUWriteMemoryFunc *syborg_fb_writefn[] = {
+ syborg_fb_write,
+ syborg_fb_write,
+ syborg_fb_write
+};
+
+static void syborg_fb_save(QEMUFile *f, void *opaque)
+{
+ SyborgFBState *s = opaque;
+ int i;
+
+ qemu_put_be32(f, s->need_int);
+ qemu_put_be32(f, s->int_status);
+ qemu_put_be32(f, s->int_enable);
+ qemu_put_be32(f, s->enabled);
+ qemu_put_be32(f, s->base);
+ qemu_put_be32(f, s->pitch);
+ qemu_put_be32(f, s->rows);
+ qemu_put_be32(f, s->cols);
+ qemu_put_be32(f, s->bpp);
+ qemu_put_be32(f, s->rgb);
+ for (i = 0; i < 256; i++) {
+ qemu_put_be32(f, s->raw_palette[i]);
+ }
+}
+
+static int syborg_fb_load(QEMUFile *f, void *opaque, int version_id)
+{
+ SyborgFBState *s = opaque;
+ int i;
+
+ if (version_id != 1)
+ return -EINVAL;
+
+ s->need_int = qemu_get_be32(f);
+ s->int_status = qemu_get_be32(f);
+ s->int_enable = qemu_get_be32(f);
+ s->enabled = qemu_get_be32(f);
+ s->base = qemu_get_be32(f);
+ s->pitch = qemu_get_be32(f);
+ s->rows = qemu_get_be32(f);
+ s->cols = qemu_get_be32(f);
+ s->bpp = qemu_get_be32(f);
+ s->rgb = qemu_get_be32(f);
+ for (i = 0; i < 256; i++) {
+ s->raw_palette[i] = qemu_get_be32(f);
+ }
+ s->need_update = 1;
+
+ return 0;
+}
+
+static void syborg_fb_init(SysBusDevice *dev)
+{
+ SyborgFBState *s = FROM_SYSBUS(SyborgFBState, dev);
+ int iomemtype;
+ int width;
+ int height;
+
+ sysbus_init_irq(dev, &s->irq);
+ iomemtype = cpu_register_io_memory(0, syborg_fb_readfn,
+ syborg_fb_writefn, s);
+ sysbus_init_mmio(dev, 0x1000, iomemtype);
+
+ width = qdev_get_prop_int(&dev->qdev, "width", 0);
+ height = qdev_get_prop_int(&dev->qdev, "height", 0);
+
+ s->ds = graphic_console_init(syborg_fb_update_display,
+ syborg_fb_invalidate_display,
+ NULL, NULL, s);
+
+ if (width != 0 && height != 0) {
+ qemu_console_resize(s->ds, width, height);
+ }
+
+ if (!width)
+ width = ds_get_width(s->ds);
+ if (!height)
+ height = ds_get_height(s->ds);
+
+ s->cols = width;
+ s->rows = height;
+
+ register_savevm("syborg_framebuffer", -1, 1,
+ syborg_fb_save, syborg_fb_load, s);
+}
+
+static void syborg_fb_register_devices(void)
+{
+ sysbus_register_dev("syborg,framebuffer", sizeof(SyborgFBState),
+ syborg_fb_init);
+}
+
+device_init(syborg_fb_register_devices)
generated by cgit v1.1 at 2024-12-27 08:29:01 +0000