555 lines
13 KiB
C
555 lines
13 KiB
C
/*
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* Syborg Framebuffer
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*
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* Copyright (c) 2009 CodeSourcery
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysbus.h"
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#include "console.h"
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#include "syborg.h"
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#include "framebuffer.h"
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//#define DEBUG_SYBORG_FB
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#ifdef DEBUG_SYBORG_FB
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#define DPRINTF(fmt, ...) \
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do { printf("syborg_fb: " fmt , ## __VA_ARGS__); } while (0)
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#define BADF(fmt, ...) \
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do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__); \
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exit(1);} while (0)
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#else
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#define DPRINTF(fmt, ...) do {} while(0)
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#define BADF(fmt, ...) \
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do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__);} while (0)
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#endif
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enum {
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FB_ID = 0,
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FB_BASE = 1,
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FB_HEIGHT = 2,
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FB_WIDTH = 3,
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FB_ORIENTATION = 4,
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FB_BLANK = 5,
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FB_INT_MASK = 6,
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FB_INTERRUPT_CAUSE = 7,
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FB_BPP = 8,
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FB_COLOR_ORDER = 9,
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FB_BYTE_ORDER = 10,
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FB_PIXEL_ORDER = 11,
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FB_ROW_PITCH = 12,
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FB_ENABLED = 13,
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FB_PALETTE_START = 0x400 >> 2,
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FB_PALETTE_END = FB_PALETTE_START+256-1,
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};
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#define FB_INT_VSYNC (1U << 0)
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#define FB_INT_BASE_UPDATE_DONE (1U << 1)
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typedef struct {
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SysBusDevice busdev;
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MemoryRegion iomem;
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DisplayState *ds;
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/*QEMUConsole *console;*/
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uint32_t need_update : 1;
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uint32_t need_int : 1;
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uint32_t enabled : 1;
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uint32_t int_status;
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uint32_t int_enable;
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qemu_irq irq;
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uint32_t base;
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uint32_t pitch;
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uint32_t rows;
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uint32_t cols;
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int blank;
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int bpp;
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int rgb; /* 0 = BGR, 1 = RGB */
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int endian; /* 0 = Little, 1 = Big */
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uint32_t raw_palette[256];
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uint32_t palette[256];
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} SyborgFBState;
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enum {
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BPP_SRC_1,
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BPP_SRC_2,
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BPP_SRC_4,
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BPP_SRC_8,
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BPP_SRC_16,
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BPP_SRC_32,
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/* TODO: Implement these. */
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BPP_SRC_15 = -1,
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BPP_SRC_24 = -2
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};
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#include "pixel_ops.h"
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#define BITS 8
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#include "pl110_template.h"
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#define BITS 15
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#include "pl110_template.h"
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#define BITS 16
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#include "pl110_template.h"
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#define BITS 24
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#include "pl110_template.h"
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#define BITS 32
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#include "pl110_template.h"
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/* Update interrupts. */
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static void syborg_fb_update(SyborgFBState *s)
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{
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if ((s->int_status & s->int_enable) != 0) {
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DPRINTF("Raise IRQ\n");
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qemu_irq_raise(s->irq);
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} else {
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DPRINTF("Lower IRQ\n");
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qemu_irq_lower(s->irq);
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}
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}
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static int syborg_fb_enabled(const SyborgFBState *s)
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{
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return s->enabled;
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}
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static void syborg_fb_update_palette(SyborgFBState *s)
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{
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int n, i;
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uint32_t raw;
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unsigned int r, g, b;
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switch (s->bpp) {
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case BPP_SRC_1: n = 2; break;
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case BPP_SRC_2: n = 4; break;
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case BPP_SRC_4: n = 16; break;
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case BPP_SRC_8: n = 256; break;
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default: return;
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}
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for (i = 0; i < n; i++) {
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raw = s->raw_palette[i];
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r = (raw >> 16) & 0xff;
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g = (raw >> 8) & 0xff;
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b = raw & 0xff;
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switch (ds_get_bits_per_pixel(s->ds)) {
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case 8:
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s->palette[i] = rgb_to_pixel8(r, g, b);
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break;
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case 15:
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s->palette[i] = rgb_to_pixel15(r, g, b);
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break;
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case 16:
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s->palette[i] = rgb_to_pixel16(r, g, b);
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break;
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case 24:
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case 32:
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s->palette[i] = rgb_to_pixel32(r, g, b);
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break;
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default:
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abort();
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}
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}
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}
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static void syborg_fb_update_display(void *opaque)
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{
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SyborgFBState *s = (SyborgFBState *)opaque;
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drawfn* fntable;
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drawfn fn;
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int dest_width;
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int src_width;
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int bpp_offset;
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int first;
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int last;
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if (!syborg_fb_enabled(s))
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return;
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switch (ds_get_bits_per_pixel(s->ds)) {
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case 0:
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return;
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case 8:
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fntable = pl110_draw_fn_8;
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dest_width = 1;
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break;
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case 15:
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fntable = pl110_draw_fn_15;
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dest_width = 2;
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break;
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case 16:
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fntable = pl110_draw_fn_16;
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dest_width = 2;
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break;
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case 24:
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fntable = pl110_draw_fn_24;
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dest_width = 3;
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break;
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case 32:
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fntable = pl110_draw_fn_32;
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dest_width = 4;
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break;
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default:
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fprintf(stderr, "syborg_fb: Bad color depth\n");
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exit(1);
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}
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if (s->need_int) {
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s->int_status |= FB_INT_BASE_UPDATE_DONE;
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syborg_fb_update(s);
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s->need_int = 0;
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}
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if (s->rgb) {
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bpp_offset = 24;
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} else {
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bpp_offset = 0;
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}
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if (s->endian) {
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bpp_offset += 8;
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}
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/* Our bpp constants mostly match the PL110/PL111 but
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* not for the 16 bit case
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*/
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switch (s->bpp) {
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case BPP_SRC_16:
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bpp_offset += 6;
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break;
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default:
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bpp_offset += s->bpp;
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}
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fn = fntable[bpp_offset];
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if (s->pitch) {
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src_width = s->pitch;
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} else {
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src_width = s->cols;
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switch (s->bpp) {
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case BPP_SRC_1:
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src_width >>= 3;
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break;
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case BPP_SRC_2:
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src_width >>= 2;
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break;
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case BPP_SRC_4:
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src_width >>= 1;
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break;
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case BPP_SRC_8:
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break;
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case BPP_SRC_15:
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case BPP_SRC_16:
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src_width <<= 1;
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break;
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case BPP_SRC_24:
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src_width *= 3;
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break;
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case BPP_SRC_32:
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src_width <<= 2;
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break;
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}
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}
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dest_width *= s->cols;
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first = 0;
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/* TODO: Implement blanking. */
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if (!s->blank) {
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if (s->need_update && s->bpp <= BPP_SRC_8) {
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syborg_fb_update_palette(s);
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}
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framebuffer_update_display(s->ds,
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s->base, s->cols, s->rows,
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src_width, dest_width, 0,
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s->need_update,
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fn, s->palette,
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&first, &last);
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if (first >= 0) {
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dpy_update(s->ds, 0, first, s->cols, last - first + 1);
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}
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s->int_status |= FB_INT_VSYNC;
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syborg_fb_update(s);
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}
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s->need_update = 0;
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}
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static void syborg_fb_invalidate_display(void * opaque)
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{
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SyborgFBState *s = (SyborgFBState *)opaque;
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s->need_update = 1;
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}
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static uint64_t syborg_fb_read(void *opaque, target_phys_addr_t offset,
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unsigned size)
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{
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SyborgFBState *s = opaque;
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DPRINTF("read reg %d\n", (int)offset);
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offset &= 0xfff;
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switch (offset >> 2) {
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case FB_ID:
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return SYBORG_ID_FRAMEBUFFER;
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case FB_BASE:
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return s->base;
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case FB_HEIGHT:
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return s->rows;
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case FB_WIDTH:
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return s->cols;
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case FB_ORIENTATION:
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return 0;
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case FB_BLANK:
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return s->blank;
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case FB_INT_MASK:
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return s->int_enable;
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case FB_INTERRUPT_CAUSE:
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return s->int_status;
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case FB_BPP:
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switch (s->bpp) {
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case BPP_SRC_1: return 1;
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case BPP_SRC_2: return 2;
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case BPP_SRC_4: return 4;
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case BPP_SRC_8: return 8;
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case BPP_SRC_15: return 15;
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case BPP_SRC_16: return 16;
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case BPP_SRC_24: return 24;
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case BPP_SRC_32: return 32;
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default: return 0;
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}
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case FB_COLOR_ORDER:
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return s->rgb;
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case FB_BYTE_ORDER:
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return s->endian;
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case FB_PIXEL_ORDER:
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return 0;
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case FB_ROW_PITCH:
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return s->pitch;
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case FB_ENABLED:
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return s->enabled;
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default:
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if ((offset >> 2) >= FB_PALETTE_START
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&& (offset >> 2) <= FB_PALETTE_END) {
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return s->raw_palette[(offset >> 2) - FB_PALETTE_START];
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} else {
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cpu_abort (cpu_single_env, "syborg_fb_read: Bad offset %x\n",
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(int)offset);
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}
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return 0;
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}
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}
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static void syborg_fb_write(void *opaque, target_phys_addr_t offset,
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uint64_t val, unsigned size)
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{
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SyborgFBState *s = opaque;
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DPRINTF("write reg %d = %d\n", (int)offset, val);
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s->need_update = 1;
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offset &= 0xfff;
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switch (offset >> 2) {
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case FB_BASE:
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s->base = val;
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s->need_int = 1;
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s->need_update = 1;
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syborg_fb_update(s);
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break;
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case FB_HEIGHT:
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s->rows = val;
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break;
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case FB_WIDTH:
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s->cols = val;
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break;
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case FB_ORIENTATION:
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/* TODO: Implement rotation. */
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break;
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case FB_BLANK:
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s->blank = val & 1;
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break;
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case FB_INT_MASK:
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s->int_enable = val;
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syborg_fb_update(s);
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break;
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case FB_INTERRUPT_CAUSE:
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s->int_status &= ~val;
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syborg_fb_update(s);
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break;
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case FB_BPP:
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switch (val) {
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case 1: val = BPP_SRC_1; break;
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case 2: val = BPP_SRC_2; break;
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case 4: val = BPP_SRC_4; break;
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case 8: val = BPP_SRC_8; break;
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/* case 15: val = BPP_SRC_15; break; */
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case 16: val = BPP_SRC_16; break;
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/* case 24: val = BPP_SRC_24; break; */
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case 32: val = BPP_SRC_32; break;
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default: val = s->bpp; break;
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}
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s->bpp = val;
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break;
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case FB_COLOR_ORDER:
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s->rgb = (val != 0);
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break;
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case FB_BYTE_ORDER:
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s->endian = (val != 0);
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break;
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case FB_PIXEL_ORDER:
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/* TODO: Implement this. */
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break;
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case FB_ROW_PITCH:
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s->pitch = val;
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break;
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case FB_ENABLED:
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s->enabled = val;
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break;
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default:
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if ((offset >> 2) >= FB_PALETTE_START
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&& (offset >> 2) <= FB_PALETTE_END) {
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s->raw_palette[(offset >> 2) - FB_PALETTE_START] = val;
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} else {
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cpu_abort (cpu_single_env, "syborg_fb_write: Bad offset %x\n",
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(int)offset);
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}
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break;
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}
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}
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static const MemoryRegionOps syborg_fb_ops = {
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.read = syborg_fb_read,
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.write = syborg_fb_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static void syborg_fb_save(QEMUFile *f, void *opaque)
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{
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SyborgFBState *s = opaque;
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int i;
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qemu_put_be32(f, s->need_int);
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qemu_put_be32(f, s->int_status);
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qemu_put_be32(f, s->int_enable);
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qemu_put_be32(f, s->enabled);
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qemu_put_be32(f, s->base);
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qemu_put_be32(f, s->pitch);
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qemu_put_be32(f, s->rows);
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qemu_put_be32(f, s->cols);
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qemu_put_be32(f, s->bpp);
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qemu_put_be32(f, s->rgb);
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for (i = 0; i < 256; i++) {
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qemu_put_be32(f, s->raw_palette[i]);
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}
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}
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static int syborg_fb_load(QEMUFile *f, void *opaque, int version_id)
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{
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SyborgFBState *s = opaque;
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int i;
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if (version_id != 1)
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return -EINVAL;
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s->need_int = qemu_get_be32(f);
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s->int_status = qemu_get_be32(f);
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s->int_enable = qemu_get_be32(f);
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s->enabled = qemu_get_be32(f);
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s->base = qemu_get_be32(f);
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s->pitch = qemu_get_be32(f);
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s->rows = qemu_get_be32(f);
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s->cols = qemu_get_be32(f);
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s->bpp = qemu_get_be32(f);
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s->rgb = qemu_get_be32(f);
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for (i = 0; i < 256; i++) {
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s->raw_palette[i] = qemu_get_be32(f);
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}
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s->need_update = 1;
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return 0;
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}
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static int syborg_fb_init(SysBusDevice *dev)
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{
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SyborgFBState *s = FROM_SYSBUS(SyborgFBState, dev);
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sysbus_init_irq(dev, &s->irq);
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memory_region_init_io(&s->iomem, &syborg_fb_ops, s,
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"framebuffer", 0x1000);
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sysbus_init_mmio(dev, &s->iomem);
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s->ds = graphic_console_init(syborg_fb_update_display,
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syborg_fb_invalidate_display,
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NULL, NULL, s);
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if (s->cols != 0 && s->rows != 0) {
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qemu_console_resize(s->ds, s->cols, s->rows);
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}
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if (!s->cols)
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s->cols = ds_get_width(s->ds);
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if (!s->rows)
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s->rows = ds_get_height(s->ds);
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register_savevm(&dev->qdev, "syborg_framebuffer", -1, 1,
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syborg_fb_save, syborg_fb_load, s);
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return 0;
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}
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static SysBusDeviceInfo syborg_fb_info = {
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.init = syborg_fb_init,
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.qdev.name = "syborg,framebuffer",
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.qdev.size = sizeof(SyborgFBState),
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.qdev.props = (Property[]) {
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DEFINE_PROP_UINT32("width", SyborgFBState, cols, 0),
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DEFINE_PROP_UINT32("height", SyborgFBState, rows, 0),
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DEFINE_PROP_END_OF_LIST(),
|
|
}
|
|
};
|
|
|
|
static void syborg_fb_register_devices(void)
|
|
{
|
|
sysbus_register_withprop(&syborg_fb_info);
|
|
}
|
|
|
|
device_init(syborg_fb_register_devices)
|