hw/display: Add basic ATI VGA emulation

At least two machines, the PPC mac99 and MIPS fulong2e, have an ATI
gfx chip by default (Rage 128 Pro and M6/RV100 respectively) and
guests running on these and the PMON2000 firmware of the fulong2e
expect this to be available. Fortunately these are very similar chips
so they can be mostly emulated in the same device model. This patch
adds basic emulation of these ATI VGA chips.

While this is incomplete and currently only enough to run the MIPS
firmware and get framebuffer output with Linux, it allows the fulong2e
board to work more like the real hardware and having it in QEMU in
this state provides a way to experiment with it and allows others to
contribute to improve it. It is compiled for all archs but only the
fulong2e (which currently has no display output at all) is set to use
it by default (in a separate patch).

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Acked-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Tested-by: Andrew Randrianasulu <randrianasulu@gmail.com>
Tested-by: Howard Spoelstra <hsp.cat7@gmail.com>
Message-id: 0b1b7c22873a6e37627261b04fb687412b25ff4f.1552152100.git.balaton@eik.bme.hu
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/hw/display/ati_int.h b/hw/display/ati_int.h
new file mode 100644
index 0000000000..a6f3e20e63
--- /dev/null
+++ b/hw/display/ati_int.h
@@ -0,0 +1,96 @@
+/*
+ * QEMU ATI SVGA emulation
+ *
+ * Copyright (c) 2019 BALATON Zoltan
+ *
+ * This work is licensed under the GNU GPL license version 2 or later.
+ */
+
+#ifndef ATI_INT_H
+#define ATI_INT_H
+
+#include "qemu/osdep.h"
+#include "hw/pci/pci.h"
+#include "vga_int.h"
+
+/*#define DEBUG_ATI*/
+
+#ifdef DEBUG_ATI
+#define DPRINTF(fmt, ...) printf("%s: " fmt, __func__, ## __VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...) do {} while (0)
+#endif
+
+#define PCI_VENDOR_ID_ATI 0x1002
+/* Rage128 Pro GL */
+#define PCI_DEVICE_ID_ATI_RAGE128_PF 0x5046
+/* Radeon RV100 (VE) */
+#define PCI_DEVICE_ID_ATI_RADEON_QY 0x5159
+
+#define TYPE_ATI_VGA "ati-vga"
+#define ATI_VGA(obj) OBJECT_CHECK(ATIVGAState, (obj), TYPE_ATI_VGA)
+
+typedef struct ATIVGARegs {
+    uint32_t mm_index;
+    uint32_t bios_scratch[8];
+    uint32_t crtc_gen_cntl;
+    uint32_t crtc_ext_cntl;
+    uint32_t dac_cntl;
+    uint32_t crtc_h_total_disp;
+    uint32_t crtc_h_sync_strt_wid;
+    uint32_t crtc_v_total_disp;
+    uint32_t crtc_v_sync_strt_wid;
+    uint32_t crtc_offset;
+    uint32_t crtc_offset_cntl;
+    uint32_t crtc_pitch;
+    uint32_t cur_offset;
+    uint32_t cur_hv_pos;
+    uint32_t cur_hv_offs;
+    uint32_t cur_color0;
+    uint32_t cur_color1;
+    uint32_t dst_offset;
+    uint32_t dst_pitch;
+    uint32_t dst_tile;
+    uint32_t dst_width;
+    uint32_t dst_height;
+    uint32_t src_offset;
+    uint32_t src_pitch;
+    uint32_t src_tile;
+    uint32_t src_x;
+    uint32_t src_y;
+    uint32_t dst_x;
+    uint32_t dst_y;
+    uint32_t dp_gui_master_cntl;
+    uint32_t dp_brush_bkgd_clr;
+    uint32_t dp_brush_frgd_clr;
+    uint32_t dp_src_frgd_clr;
+    uint32_t dp_src_bkgd_clr;
+    uint32_t dp_cntl;
+    uint32_t dp_datatype;
+    uint32_t dp_mix;
+    uint32_t dp_write_mask;
+    uint32_t default_offset;
+    uint32_t default_pitch;
+    uint32_t default_sc_bottom_right;
+} ATIVGARegs;
+
+typedef struct ATIVGAState {
+    PCIDevice dev;
+    VGACommonState vga;
+    char *model;
+    uint16_t dev_id;
+    uint8_t mode;
+    bool cursor_guest_mode;
+    uint16_t cursor_size;
+    uint32_t cursor_offset;
+    QEMUCursor *cursor;
+    MemoryRegion io;
+    MemoryRegion mm;
+    ATIVGARegs regs;
+} ATIVGAState;
+
+const char *ati_reg_name(int num);
+
+void ati_2d_blt(ATIVGAState *s);
+
+#endif /* ATI_INT_H */