From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/video/fbdev/aty/mach64_accel.c | 429 +++++++++++++++++++++++++++++++++
 1 file changed, 429 insertions(+)
 create mode 100644 drivers/video/fbdev/aty/mach64_accel.c

(limited to 'drivers/video/fbdev/aty/mach64_accel.c')

diff --git a/drivers/video/fbdev/aty/mach64_accel.c b/drivers/video/fbdev/aty/mach64_accel.c
new file mode 100644
index 0000000000..e4b2c89bae
--- /dev/null
+++ b/drivers/video/fbdev/aty/mach64_accel.c
@@ -0,0 +1,429 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ *  ATI Mach64 Hardware Acceleration
+ */
+
+#include <linux/delay.h>
+#include <asm/unaligned.h>
+#include <linux/fb.h>
+#include <video/mach64.h>
+#include "atyfb.h"
+
+    /*
+     *  Generic Mach64 routines
+     */
+
+/* this is for DMA GUI engine! work in progress */
+typedef struct {
+	u32 frame_buf_offset;
+	u32 system_mem_addr;
+	u32 command;
+	u32 reserved;
+} BM_DESCRIPTOR_ENTRY;
+
+#define LAST_DESCRIPTOR (1 << 31)
+#define SYSTEM_TO_FRAME_BUFFER 0
+
+static u32 rotation24bpp(u32 dx, u32 direction)
+{
+	u32 rotation;
+	if (direction & DST_X_LEFT_TO_RIGHT) {
+		rotation = (dx / 4) % 6;
+	} else {
+		rotation = ((dx + 2) / 4) % 6;
+	}
+
+	return ((rotation << 8) | DST_24_ROTATION_ENABLE);
+}
+
+void aty_reset_engine(struct atyfb_par *par)
+{
+	/* reset engine */
+	aty_st_le32(GEN_TEST_CNTL,
+		aty_ld_le32(GEN_TEST_CNTL, par) &
+		~(GUI_ENGINE_ENABLE | HWCURSOR_ENABLE), par);
+	/* enable engine */
+	aty_st_le32(GEN_TEST_CNTL,
+		aty_ld_le32(GEN_TEST_CNTL, par) | GUI_ENGINE_ENABLE, par);
+	/* ensure engine is not locked up by clearing any FIFO or */
+	/* HOST errors */
+	aty_st_le32(BUS_CNTL,
+		aty_ld_le32(BUS_CNTL, par) | BUS_HOST_ERR_ACK | BUS_FIFO_ERR_ACK, par);
+
+	par->fifo_space = 0;
+}
+
+static void reset_GTC_3D_engine(const struct atyfb_par *par)
+{
+	aty_st_le32(SCALE_3D_CNTL, 0xc0, par);
+	mdelay(GTC_3D_RESET_DELAY);
+	aty_st_le32(SETUP_CNTL, 0x00, par);
+	mdelay(GTC_3D_RESET_DELAY);
+	aty_st_le32(SCALE_3D_CNTL, 0x00, par);
+	mdelay(GTC_3D_RESET_DELAY);
+}
+
+void aty_init_engine(struct atyfb_par *par, struct fb_info *info)
+{
+	u32 pitch_value;
+	u32 vxres;
+
+	/* determine modal information from global mode structure */
+	pitch_value = info->fix.line_length / (info->var.bits_per_pixel / 8);
+	vxres = info->var.xres_virtual;
+
+	if (info->var.bits_per_pixel == 24) {
+		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
+		/* horizontal coordinates and widths must be adjusted */
+		pitch_value *= 3;
+		vxres *= 3;
+	}
+
+	/* On GTC (RagePro), we need to reset the 3D engine before */
+	if (M64_HAS(RESET_3D))
+		reset_GTC_3D_engine(par);
+
+	/* Reset engine, enable, and clear any engine errors */
+	aty_reset_engine(par);
+	/* Ensure that vga page pointers are set to zero - the upper */
+	/* page pointers are set to 1 to handle overflows in the */
+	/* lower page */
+	aty_st_le32(MEM_VGA_WP_SEL, 0x00010000, par);
+	aty_st_le32(MEM_VGA_RP_SEL, 0x00010000, par);
+
+	/* ---- Setup standard engine context ---- */
+
+	/* All GUI registers here are FIFOed - therefore, wait for */
+	/* the appropriate number of empty FIFO entries */
+	wait_for_fifo(14, par);
+
+	/* enable all registers to be loaded for context loads */
+	aty_st_le32(CONTEXT_MASK, 0xFFFFFFFF, par);
+
+	/* set destination pitch to modal pitch, set offset to zero */
+	aty_st_le32(DST_OFF_PITCH, (pitch_value / 8) << 22, par);
+
+	/* zero these registers (set them to a known state) */
+	aty_st_le32(DST_Y_X, 0, par);
+	aty_st_le32(DST_HEIGHT, 0, par);
+	aty_st_le32(DST_BRES_ERR, 0, par);
+	aty_st_le32(DST_BRES_INC, 0, par);
+	aty_st_le32(DST_BRES_DEC, 0, par);
+
+	/* set destination drawing attributes */
+	aty_st_le32(DST_CNTL, DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
+		    DST_X_LEFT_TO_RIGHT, par);
+
+	/* set source pitch to modal pitch, set offset to zero */
+	aty_st_le32(SRC_OFF_PITCH, (pitch_value / 8) << 22, par);
+
+	/* set these registers to a known state */
+	aty_st_le32(SRC_Y_X, 0, par);
+	aty_st_le32(SRC_HEIGHT1_WIDTH1, 1, par);
+	aty_st_le32(SRC_Y_X_START, 0, par);
+	aty_st_le32(SRC_HEIGHT2_WIDTH2, 1, par);
+
+	/* set source pixel retrieving attributes */
+	aty_st_le32(SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT, par);
+
+	/* set host attributes */
+	wait_for_fifo(13, par);
+	aty_st_le32(HOST_CNTL, HOST_BYTE_ALIGN, par);
+
+	/* set pattern attributes */
+	aty_st_le32(PAT_REG0, 0, par);
+	aty_st_le32(PAT_REG1, 0, par);
+	aty_st_le32(PAT_CNTL, 0, par);
+
+	/* set scissors to modal size */
+	aty_st_le32(SC_LEFT, 0, par);
+	aty_st_le32(SC_TOP, 0, par);
+	aty_st_le32(SC_BOTTOM, par->crtc.vyres - 1, par);
+	aty_st_le32(SC_RIGHT, vxres - 1, par);
+
+	/* set background color to minimum value (usually BLACK) */
+	aty_st_le32(DP_BKGD_CLR, 0, par);
+
+	/* set foreground color to maximum value (usually WHITE) */
+	aty_st_le32(DP_FRGD_CLR, 0xFFFFFFFF, par);
+
+	/* set write mask to effect all pixel bits */
+	aty_st_le32(DP_WRITE_MASK, 0xFFFFFFFF, par);
+
+	/* set foreground mix to overpaint and background mix to */
+	/* no-effect */
+	aty_st_le32(DP_MIX, FRGD_MIX_S | BKGD_MIX_D, par);
+
+	/* set primary source pixel channel to foreground color */
+	/* register */
+	aty_st_le32(DP_SRC, FRGD_SRC_FRGD_CLR, par);
+
+	/* set compare functionality to false (no-effect on */
+	/* destination) */
+	wait_for_fifo(3, par);
+	aty_st_le32(CLR_CMP_CLR, 0, par);
+	aty_st_le32(CLR_CMP_MASK, 0xFFFFFFFF, par);
+	aty_st_le32(CLR_CMP_CNTL, 0, par);
+
+	/* set pixel depth */
+	wait_for_fifo(2, par);
+	aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
+	aty_st_le32(DP_CHAIN_MASK, par->crtc.dp_chain_mask, par);
+
+	wait_for_fifo(5, par);
+ 	aty_st_le32(SCALE_3D_CNTL, 0, par);
+	aty_st_le32(Z_CNTL, 0, par);
+	aty_st_le32(CRTC_INT_CNTL, aty_ld_le32(CRTC_INT_CNTL, par) & ~0x20,
+		    par);
+	aty_st_le32(GUI_TRAJ_CNTL, 0x100023, par);
+
+	/* insure engine is idle before leaving */
+	wait_for_idle(par);
+}
+
+    /*
+     *  Accelerated functions
+     */
+
+static inline void draw_rect(s16 x, s16 y, u16 width, u16 height,
+			     struct atyfb_par *par)
+{
+	/* perform rectangle fill */
+	wait_for_fifo(2, par);
+	aty_st_le32(DST_Y_X, (x << 16) | y, par);
+	aty_st_le32(DST_HEIGHT_WIDTH, (width << 16) | height, par);
+	par->blitter_may_be_busy = 1;
+}
+
+void atyfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+	struct atyfb_par *par = (struct atyfb_par *) info->par;
+	u32 dy = area->dy, sy = area->sy, direction = DST_LAST_PEL;
+	u32 sx = area->sx, dx = area->dx, width = area->width, rotation = 0;
+
+	if (par->asleep)
+		return;
+	if (!area->width || !area->height)
+		return;
+	if (!par->accel_flags) {
+		cfb_copyarea(info, area);
+		return;
+	}
+
+	if (info->var.bits_per_pixel == 24) {
+		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
+		/* horizontal coordinates and widths must be adjusted */
+		sx *= 3;
+		dx *= 3;
+		width *= 3;
+	}
+
+	if (area->sy < area->dy) {
+		dy += area->height - 1;
+		sy += area->height - 1;
+	} else
+		direction |= DST_Y_TOP_TO_BOTTOM;
+
+	if (sx < dx) {
+		dx += width - 1;
+		sx += width - 1;
+	} else
+		direction |= DST_X_LEFT_TO_RIGHT;
+
+	if (info->var.bits_per_pixel == 24) {
+		rotation = rotation24bpp(dx, direction);
+	}
+
+	wait_for_fifo(5, par);
+	aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
+	aty_st_le32(DP_SRC, FRGD_SRC_BLIT, par);
+	aty_st_le32(SRC_Y_X, (sx << 16) | sy, par);
+	aty_st_le32(SRC_HEIGHT1_WIDTH1, (width << 16) | area->height, par);
+	aty_st_le32(DST_CNTL, direction | rotation, par);
+	draw_rect(dx, dy, width, area->height, par);
+}
+
+void atyfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct atyfb_par *par = (struct atyfb_par *) info->par;
+	u32 color, dx = rect->dx, width = rect->width, rotation = 0;
+
+	if (par->asleep)
+		return;
+	if (!rect->width || !rect->height)
+		return;
+	if (!par->accel_flags) {
+		cfb_fillrect(info, rect);
+		return;
+	}
+
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
+	    info->fix.visual == FB_VISUAL_DIRECTCOLOR)
+		color = ((u32 *)(info->pseudo_palette))[rect->color];
+	else
+		color = rect->color;
+
+	if (info->var.bits_per_pixel == 24) {
+		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
+		/* horizontal coordinates and widths must be adjusted */
+		dx *= 3;
+		width *= 3;
+		rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
+	}
+
+	wait_for_fifo(4, par);
+	aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
+	aty_st_le32(DP_FRGD_CLR, color, par);
+	aty_st_le32(DP_SRC,
+		    BKGD_SRC_BKGD_CLR | FRGD_SRC_FRGD_CLR | MONO_SRC_ONE,
+		    par);
+	aty_st_le32(DST_CNTL,
+		    DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
+		    DST_X_LEFT_TO_RIGHT | rotation, par);
+	draw_rect(dx, rect->dy, width, rect->height, par);
+}
+
+void atyfb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct atyfb_par *par = (struct atyfb_par *) info->par;
+	u32 src_bytes, dx = image->dx, dy = image->dy, width = image->width;
+	u32 pix_width, rotation = 0, src, mix;
+
+	if (par->asleep)
+		return;
+	if (!image->width || !image->height)
+		return;
+	if (!par->accel_flags ||
+	    (image->depth != 1 && info->var.bits_per_pixel != image->depth)) {
+		cfb_imageblit(info, image);
+		return;
+	}
+
+	pix_width = par->crtc.dp_pix_width;
+
+	switch (image->depth) {
+	case 1:
+	    pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
+	    pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_1BPP);
+	    break;
+	case 4:
+	    pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
+	    pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_4BPP);
+	    break;
+	case 8:
+	    pix_width &= ~HOST_MASK;
+	    pix_width |= HOST_8BPP;
+	    break;
+	case 15:
+	    pix_width &= ~HOST_MASK;
+	    pix_width |= HOST_15BPP;
+	    break;
+	case 16:
+	    pix_width &= ~HOST_MASK;
+	    pix_width |= HOST_16BPP;
+	    break;
+	case 24:
+	    pix_width &= ~HOST_MASK;
+	    pix_width |= HOST_24BPP;
+	    break;
+	case 32:
+	    pix_width &= ~HOST_MASK;
+	    pix_width |= HOST_32BPP;
+	    break;
+	}
+
+	if (info->var.bits_per_pixel == 24) {
+		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
+		/* horizontal coordinates and widths must be adjusted */
+		dx *= 3;
+		width *= 3;
+
+		rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
+
+		pix_width &= ~DST_MASK;
+		pix_width |= DST_8BPP;
+
+		/*
+		 * since Rage 3D IIc we have DP_HOST_TRIPLE_EN bit
+		 * this hwaccelerated triple has an issue with not aligned data
+		 */
+		if (image->depth == 1 && M64_HAS(HW_TRIPLE) && image->width % 8 == 0)
+			pix_width |= DP_HOST_TRIPLE_EN;
+	}
+
+	if (image->depth == 1) {
+		u32 fg, bg;
+		if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
+		    info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+			fg = ((u32*)(info->pseudo_palette))[image->fg_color];
+			bg = ((u32*)(info->pseudo_palette))[image->bg_color];
+		} else {
+			fg = image->fg_color;
+			bg = image->bg_color;
+		}
+
+		wait_for_fifo(2, par);
+		aty_st_le32(DP_BKGD_CLR, bg, par);
+		aty_st_le32(DP_FRGD_CLR, fg, par);
+		src = MONO_SRC_HOST | FRGD_SRC_FRGD_CLR | BKGD_SRC_BKGD_CLR;
+		mix = FRGD_MIX_S | BKGD_MIX_S;
+	} else {
+		src = MONO_SRC_ONE | FRGD_SRC_HOST;
+		mix = FRGD_MIX_D_XOR_S | BKGD_MIX_D;
+	}
+
+	wait_for_fifo(5, par);
+	aty_st_le32(DP_PIX_WIDTH, pix_width, par);
+	aty_st_le32(DP_MIX, mix, par);
+	aty_st_le32(DP_SRC, src, par);
+	aty_st_le32(HOST_CNTL, HOST_BYTE_ALIGN, par);
+	aty_st_le32(DST_CNTL, DST_Y_TOP_TO_BOTTOM | DST_X_LEFT_TO_RIGHT | rotation, par);
+
+	draw_rect(dx, dy, width, image->height, par);
+	src_bytes = (((image->width * image->depth) + 7) / 8) * image->height;
+
+	/* manual triple each pixel */
+	if (image->depth == 1 && info->var.bits_per_pixel == 24 && !(pix_width & DP_HOST_TRIPLE_EN)) {
+		int inbit, outbit, mult24, byte_id_in_dword, width;
+		u8 *pbitmapin = (u8*)image->data, *pbitmapout;
+		u32 hostdword;
+
+		for (width = image->width, inbit = 7, mult24 = 0; src_bytes; ) {
+			for (hostdword = 0, pbitmapout = (u8*)&hostdword, byte_id_in_dword = 0;
+				byte_id_in_dword < 4 && src_bytes;
+				byte_id_in_dword++, pbitmapout++) {
+				for (outbit = 7; outbit >= 0; outbit--) {
+					*pbitmapout |= (((*pbitmapin >> inbit) & 1) << outbit);
+					mult24++;
+					/* next bit */
+					if (mult24 == 3) {
+						mult24 = 0;
+						inbit--;
+						width--;
+					}
+
+					/* next byte */
+					if (inbit < 0 || width == 0) {
+						src_bytes--;
+						pbitmapin++;
+						inbit = 7;
+
+						if (width == 0) {
+						    width = image->width;
+						    outbit = 0;
+						}
+					}
+				}
+			}
+			wait_for_fifo(1, par);
+			aty_st_le32(HOST_DATA0, le32_to_cpu(hostdword), par);
+		}
+	} else {
+		u32 *pbitmap, dwords = (src_bytes + 3) / 4;
+		for (pbitmap = (u32*)(image->data); dwords; dwords--, pbitmap++) {
+			wait_for_fifo(1, par);
+			aty_st_le32(HOST_DATA0, get_unaligned_le32(pbitmap), par);
+		}
+	}
+}
-- 
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