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-rw-r--r--drivers/video/fbdev/core/cfbfillrect.c362
1 files changed, 11 insertions, 351 deletions
diff --git a/drivers/video/fbdev/core/cfbfillrect.c b/drivers/video/fbdev/core/cfbfillrect.c
index cbaa4c9e2355..615de89256d5 100644
--- a/drivers/video/fbdev/core/cfbfillrect.c
+++ b/drivers/video/fbdev/core/cfbfillrect.c
@@ -1,374 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
- * Generic fillrect for frame buffers with packed pixels of any depth.
- *
- * Copyright (C) 2000 James Simmons (jsimmons@linux-fbdev.org)
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- *
- * NOTES:
- *
- * Also need to add code to deal with cards endians that are different than
- * the native cpu endians. I also need to deal with MSB position in the word.
- *
+ * Copyright (C) 2025 Zsolt Kajtar (soci@c64.rulez.org)
*/
#include <linux/module.h>
-#include <linux/string.h>
#include <linux/fb.h>
+#include <linux/bitrev.h>
#include <asm/types.h>
-#include "fb_draw.h"
-#if BITS_PER_LONG == 32
-# define FB_WRITEL fb_writel
-# define FB_READL fb_readl
-#else
-# define FB_WRITEL fb_writeq
-# define FB_READL fb_readq
+#ifdef CONFIG_FB_CFB_REV_PIXELS_IN_BYTE
+#define FB_REV_PIXELS_IN_BYTE
#endif
- /*
- * Aligned pattern fill using 32/64-bit memory accesses
- */
-
-static void
-bitfill_aligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
- unsigned long pat, unsigned n, int bits, u32 bswapmask)
-{
- unsigned long first, last;
-
- if (!n)
- return;
-
- first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
- last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
-
- if (dst_idx+n <= bits) {
- // Single word
- if (last)
- first &= last;
- FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
- } else {
- // Multiple destination words
-
- // Leading bits
- if (first!= ~0UL) {
- FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
- dst++;
- n -= bits - dst_idx;
- }
-
- // Main chunk
- n /= bits;
- while (n >= 8) {
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- FB_WRITEL(pat, dst++);
- n -= 8;
- }
- while (n--)
- FB_WRITEL(pat, dst++);
-
- // Trailing bits
- if (last)
- FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
- }
-}
-
-
- /*
- * Unaligned generic pattern fill using 32/64-bit memory accesses
- * The pattern must have been expanded to a full 32/64-bit value
- * Left/right are the appropriate shifts to convert to the pattern to be
- * used for the next 32/64-bit word
- */
-
-static void
-bitfill_unaligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
- unsigned long pat, int left, int right, unsigned n, int bits)
-{
- unsigned long first, last;
-
- if (!n)
- return;
-
- first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
- last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
-
- if (dst_idx+n <= bits) {
- // Single word
- if (last)
- first &= last;
- FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
- } else {
- // Multiple destination words
- // Leading bits
- if (first) {
- FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
- dst++;
- pat = pat << left | pat >> right;
- n -= bits - dst_idx;
- }
-
- // Main chunk
- n /= bits;
- while (n >= 4) {
- FB_WRITEL(pat, dst++);
- pat = pat << left | pat >> right;
- FB_WRITEL(pat, dst++);
- pat = pat << left | pat >> right;
- FB_WRITEL(pat, dst++);
- pat = pat << left | pat >> right;
- FB_WRITEL(pat, dst++);
- pat = pat << left | pat >> right;
- n -= 4;
- }
- while (n--) {
- FB_WRITEL(pat, dst++);
- pat = pat << left | pat >> right;
- }
-
- // Trailing bits
- if (last)
- FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
- }
-}
-
- /*
- * Aligned pattern invert using 32/64-bit memory accesses
- */
-static void
-bitfill_aligned_rev(struct fb_info *p, unsigned long __iomem *dst,
- int dst_idx, unsigned long pat, unsigned n, int bits,
- u32 bswapmask)
-{
- unsigned long val = pat, dat;
- unsigned long first, last;
-
- if (!n)
- return;
-
- first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
- last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
-
- if (dst_idx+n <= bits) {
- // Single word
- if (last)
- first &= last;
- dat = FB_READL(dst);
- FB_WRITEL(comp(dat ^ val, dat, first), dst);
- } else {
- // Multiple destination words
- // Leading bits
- if (first!=0UL) {
- dat = FB_READL(dst);
- FB_WRITEL(comp(dat ^ val, dat, first), dst);
- dst++;
- n -= bits - dst_idx;
- }
-
- // Main chunk
- n /= bits;
- while (n >= 8) {
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- n -= 8;
- }
- while (n--) {
- FB_WRITEL(FB_READL(dst) ^ val, dst);
- dst++;
- }
- // Trailing bits
- if (last) {
- dat = FB_READL(dst);
- FB_WRITEL(comp(dat ^ val, dat, last), dst);
- }
- }
-}
-
-
- /*
- * Unaligned generic pattern invert using 32/64-bit memory accesses
- * The pattern must have been expanded to a full 32/64-bit value
- * Left/right are the appropriate shifts to convert to the pattern to be
- * used for the next 32/64-bit word
- */
-
-static void
-bitfill_unaligned_rev(struct fb_info *p, unsigned long __iomem *dst,
- int dst_idx, unsigned long pat, int left, int right,
- unsigned n, int bits)
-{
- unsigned long first, last, dat;
-
- if (!n)
- return;
-
- first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
- last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
-
- if (dst_idx+n <= bits) {
- // Single word
- if (last)
- first &= last;
- dat = FB_READL(dst);
- FB_WRITEL(comp(dat ^ pat, dat, first), dst);
- } else {
- // Multiple destination words
-
- // Leading bits
- if (first != 0UL) {
- dat = FB_READL(dst);
- FB_WRITEL(comp(dat ^ pat, dat, first), dst);
- dst++;
- pat = pat << left | pat >> right;
- n -= bits - dst_idx;
- }
-
- // Main chunk
- n /= bits;
- while (n >= 4) {
- FB_WRITEL(FB_READL(dst) ^ pat, dst);
- dst++;
- pat = pat << left | pat >> right;
- FB_WRITEL(FB_READL(dst) ^ pat, dst);
- dst++;
- pat = pat << left | pat >> right;
- FB_WRITEL(FB_READL(dst) ^ pat, dst);
- dst++;
- pat = pat << left | pat >> right;
- FB_WRITEL(FB_READL(dst) ^ pat, dst);
- dst++;
- pat = pat << left | pat >> right;
- n -= 4;
- }
- while (n--) {
- FB_WRITEL(FB_READL(dst) ^ pat, dst);
- dst++;
- pat = pat << left | pat >> right;
- }
-
- // Trailing bits
- if (last) {
- dat = FB_READL(dst);
- FB_WRITEL(comp(dat ^ pat, dat, last), dst);
- }
- }
-}
+#include "cfbmem.h"
+#include "fb_fillrect.h"
void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
{
- unsigned long pat, pat2, fg;
- unsigned long width = rect->width, height = rect->height;
- int bits = BITS_PER_LONG, bytes = bits >> 3;
- u32 bpp = p->var.bits_per_pixel;
- unsigned long __iomem *dst;
- int dst_idx, left;
-
if (p->state != FBINFO_STATE_RUNNING)
return;
if (p->flags & FBINFO_VIRTFB)
- fb_warn_once(p, "Framebuffer is not in I/O address space.");
-
- if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
- p->fix.visual == FB_VISUAL_DIRECTCOLOR )
- fg = ((u32 *) (p->pseudo_palette))[rect->color];
- else
- fg = rect->color;
-
- pat = pixel_to_pat(bpp, fg);
+ fb_warn_once(p, "%s: framebuffer is not in I/O address space.\n", __func__);
- dst = (unsigned long __iomem *)((unsigned long)p->screen_base & ~(bytes-1));
- dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8;
- dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp;
- /* FIXME For now we support 1-32 bpp only */
- left = bits % bpp;
if (p->fbops->fb_sync)
p->fbops->fb_sync(p);
- if (!left) {
- u32 bswapmask = fb_compute_bswapmask(p);
- void (*fill_op32)(struct fb_info *p,
- unsigned long __iomem *dst, int dst_idx,
- unsigned long pat, unsigned n, int bits,
- u32 bswapmask) = NULL;
- switch (rect->rop) {
- case ROP_XOR:
- fill_op32 = bitfill_aligned_rev;
- break;
- case ROP_COPY:
- fill_op32 = bitfill_aligned;
- break;
- default:
- printk( KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n");
- fill_op32 = bitfill_aligned;
- break;
- }
- while (height--) {
- dst += dst_idx >> (ffs(bits) - 1);
- dst_idx &= (bits - 1);
- fill_op32(p, dst, dst_idx, pat, width*bpp, bits,
- bswapmask);
- dst_idx += p->fix.line_length*8;
- }
- } else {
- int right, r;
- void (*fill_op)(struct fb_info *p, unsigned long __iomem *dst,
- int dst_idx, unsigned long pat, int left,
- int right, unsigned n, int bits) = NULL;
-#ifdef __LITTLE_ENDIAN
- right = left;
- left = bpp - right;
-#else
- right = bpp - left;
-#endif
- switch (rect->rop) {
- case ROP_XOR:
- fill_op = bitfill_unaligned_rev;
- break;
- case ROP_COPY:
- fill_op = bitfill_unaligned;
- break;
- default:
- printk(KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n");
- fill_op = bitfill_unaligned;
- break;
- }
- while (height--) {
- dst += dst_idx / bits;
- dst_idx &= (bits - 1);
- r = dst_idx % bpp;
- /* rotate pattern to the correct start position */
- pat2 = le_long_to_cpu(rolx(cpu_to_le_long(pat), r, bpp));
- fill_op(p, dst, dst_idx, pat2, left, right,
- width*bpp, bits);
- dst_idx += p->fix.line_length*8;
- }
- }
+ fb_fillrect(p, rect);
}
-
EXPORT_SYMBOL(cfb_fillrect);
-MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
-MODULE_DESCRIPTION("Generic software accelerated fill rectangle");
+MODULE_AUTHOR("Zsolt Kajtar <soci@c64.rulez.org>");
+MODULE_DESCRIPTION("I/O memory packed pixel framebuffer area fill");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.46.0) at 2025-04-28 04:56:42 +0000