| /* |
| * linux/drivers/video/cfb16.c -- Low level frame buffer operations for 16 bpp |
| * truecolor packed pixels |
| * |
| * Created 5 Apr 1997 by Geert Uytterhoeven |
| * |
| * 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. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/tty.h> |
| #include <linux/console.h> |
| #include <linux/string.h> |
| #include <linux/fb.h> |
| #include <asm/io.h> |
| |
| #include <video/fbcon.h> |
| #include <video/fbcon-cfb16.h> |
| |
| |
| /* |
| * 16 bpp packed pixels |
| */ |
| |
| static u32 tab_cfb16[] = { |
| #if defined(__BIG_ENDIAN) |
| 0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff |
| #elif defined(__LITTLE_ENDIAN) |
| 0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff |
| #else |
| #error FIXME: No endianness?? |
| #endif |
| }; |
| |
| void fbcon_cfb16_setup(struct display *p) |
| { |
| p->next_line = p->line_length ? p->line_length : p->var.xres_virtual<<1; |
| p->next_plane = 0; |
| } |
| |
| void fbcon_cfb16_bmove(struct display *p, int sy, int sx, int dy, int dx, |
| int height, int width) |
| { |
| int bytes = p->next_line, linesize = bytes * fontheight(p), rows; |
| u8 *src, *dst; |
| |
| if (sx == 0 && dx == 0 && width * fontwidth(p) * 2 == bytes) { |
| fb_memmove(p->screen_base + dy * linesize, |
| p->screen_base + sy * linesize, |
| height * linesize); |
| return; |
| } |
| if (fontwidthlog(p)) { |
| sx <<= fontwidthlog(p)+1; |
| dx <<= fontwidthlog(p)+1; |
| width <<= fontwidthlog(p)+1; |
| } else { |
| sx *= fontwidth(p)*2; |
| dx *= fontwidth(p)*2; |
| width *= fontwidth(p)*2; |
| } |
| if (dy < sy || (dy == sy && dx < sx)) { |
| src = p->screen_base + sy * linesize + sx; |
| dst = p->screen_base + dy * linesize + dx; |
| for (rows = height * fontheight(p); rows--;) { |
| fb_memmove(dst, src, width); |
| src += bytes; |
| dst += bytes; |
| } |
| } else { |
| src = p->screen_base + (sy+height) * linesize + sx - bytes; |
| dst = p->screen_base + (dy+height) * linesize + dx - bytes; |
| for (rows = height * fontheight(p); rows--;) { |
| fb_memmove(dst, src, width); |
| src -= bytes; |
| dst -= bytes; |
| } |
| } |
| } |
| |
| static inline void rectfill(u8 *dest, int width, int height, u32 data, |
| int linesize) |
| { |
| int i; |
| |
| data |= data<<16; |
| |
| while (height-- > 0) { |
| u32 *p = (u32 *)dest; |
| for (i = 0; i < width/4; i++) { |
| fb_writel(data, p++); |
| fb_writel(data, p++); |
| } |
| if (width & 2) |
| fb_writel(data, p++); |
| if (width & 1) |
| fb_writew(data, (u16*)p); |
| dest += linesize; |
| } |
| } |
| |
| void fbcon_cfb16_clear(struct vc_data *conp, struct display *p, int sy, int sx, |
| int height, int width) |
| { |
| u8 *dest; |
| int bytes = p->next_line, lines = height * fontheight(p); |
| u32 bgx; |
| |
| dest = p->screen_base + sy * fontheight(p) * bytes + sx * fontwidth(p) * 2; |
| |
| bgx = ((u16 *)p->dispsw_data)[attr_bgcol_ec(p, conp)]; |
| |
| width *= fontwidth(p)/4; |
| if (width * 8 == bytes) |
| rectfill(dest, lines * width * 4, 1, bgx, bytes); |
| else |
| rectfill(dest, width * 4, lines, bgx, bytes); |
| } |
| |
| void fbcon_cfb16_putc(struct vc_data *conp, struct display *p, int c, int yy, |
| int xx) |
| { |
| u8 *dest, *cdat, bits; |
| int bytes = p->next_line, rows; |
| u32 eorx, fgx, bgx; |
| |
| dest = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 2; |
| |
| fgx = ((u16 *)p->dispsw_data)[attr_fgcol(p, c)]; |
| bgx = ((u16 *)p->dispsw_data)[attr_bgcol(p, c)]; |
| fgx |= (fgx << 16); |
| bgx |= (bgx << 16); |
| eorx = fgx ^ bgx; |
| |
| switch (fontwidth(p)) { |
| case 4: |
| case 8: |
| cdat = p->fontdata + (c & p->charmask) * fontheight(p); |
| for (rows = fontheight(p); rows--; dest += bytes) { |
| bits = *cdat++; |
| fb_writel((tab_cfb16[bits >> 6] & eorx) ^ bgx, dest); |
| fb_writel((tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx, dest+4); |
| if (fontwidth(p) == 8) { |
| fb_writel((tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx, dest+8); |
| fb_writel((tab_cfb16[bits & 3] & eorx) ^ bgx, dest+12); |
| } |
| } |
| break; |
| case 12: |
| case 16: |
| cdat = p->fontdata + ((c & p->charmask) * fontheight(p) << 1); |
| for (rows = fontheight(p); rows--; dest += bytes) { |
| bits = *cdat++; |
| fb_writel((tab_cfb16[bits >> 6] & eorx) ^ bgx, dest); |
| fb_writel((tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx, dest+4); |
| fb_writel((tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx, dest+8); |
| fb_writel((tab_cfb16[bits & 3] & eorx) ^ bgx, dest+12); |
| bits = *cdat++; |
| fb_writel((tab_cfb16[bits >> 6] & eorx) ^ bgx, dest+16); |
| fb_writel((tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx, dest+20); |
| if (fontwidth(p) == 16) { |
| fb_writel((tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx, dest+24); |
| fb_writel((tab_cfb16[bits & 3] & eorx) ^ bgx, dest+28); |
| } |
| } |
| break; |
| } |
| } |
| |
| void fbcon_cfb16_putcs(struct vc_data *conp, struct display *p, |
| const unsigned short *s, int count, int yy, int xx) |
| { |
| u8 *cdat, *dest, *dest0; |
| u16 c; |
| int rows, bytes = p->next_line; |
| u32 eorx, fgx, bgx; |
| |
| dest0 = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 2; |
| c = scr_readw(s); |
| fgx = ((u16 *)p->dispsw_data)[attr_fgcol(p, c)]; |
| bgx = ((u16 *)p->dispsw_data)[attr_bgcol(p, c)]; |
| fgx |= (fgx << 16); |
| bgx |= (bgx << 16); |
| eorx = fgx ^ bgx; |
| |
| switch (fontwidth(p)) { |
| case 4: |
| case 8: |
| while (count--) { |
| c = scr_readw(s++) & p->charmask; |
| cdat = p->fontdata + c * fontheight(p); |
| for (rows = fontheight(p), dest = dest0; rows--; dest += bytes) { |
| u8 bits = *cdat++; |
| fb_writel((tab_cfb16[bits >> 6] & eorx) ^ bgx, dest); |
| fb_writel((tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx, dest+4); |
| if (fontwidth(p) == 8) { |
| fb_writel((tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx, dest+8); |
| fb_writel((tab_cfb16[bits & 3] & eorx) ^ bgx, dest+12); |
| } |
| } |
| dest0 += fontwidth(p)*2;; |
| } |
| break; |
| case 12: |
| case 16: |
| while (count--) { |
| c = scr_readw(s++) & p->charmask; |
| cdat = p->fontdata + (c * fontheight(p) << 1); |
| for (rows = fontheight(p), dest = dest0; rows--; dest += bytes) { |
| u8 bits = *cdat++; |
| fb_writel((tab_cfb16[bits >> 6] & eorx) ^ bgx, dest); |
| fb_writel((tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx, dest+4); |
| fb_writel((tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx, dest+8); |
| fb_writel((tab_cfb16[bits & 3] & eorx) ^ bgx, dest+12); |
| bits = *cdat++; |
| fb_writel((tab_cfb16[bits >> 6] & eorx) ^ bgx, dest+16); |
| fb_writel((tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx, dest+20); |
| if (fontwidth(p) == 16) { |
| fb_writel((tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx, dest+24); |
| fb_writel((tab_cfb16[bits & 3] & eorx) ^ bgx, dest+28); |
| } |
| } |
| dest0 += fontwidth(p)*2; |
| } |
| break; |
| } |
| } |
| |
| void fbcon_cfb16_revc(struct display *p, int xx, int yy) |
| { |
| u8 *dest; |
| int bytes = p->next_line, rows; |
| |
| dest = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p)*2; |
| for (rows = fontheight(p); rows--; dest += bytes) { |
| switch (fontwidth(p)) { |
| case 16: |
| fb_writel(fb_readl(dest+24) ^ 0xffffffff, dest+24); |
| fb_writel(fb_readl(dest+28) ^ 0xffffffff, dest+28); |
| /* FALL THROUGH */ |
| case 12: |
| fb_writel(fb_readl(dest+16) ^ 0xffffffff, dest+16); |
| fb_writel(fb_readl(dest+20) ^ 0xffffffff, dest+20); |
| /* FALL THROUGH */ |
| case 8: |
| fb_writel(fb_readl(dest+8) ^ 0xffffffff, dest+8); |
| fb_writel(fb_readl(dest+12) ^ 0xffffffff, dest+12); |
| /* FALL THROUGH */ |
| case 4: |
| fb_writel(fb_readl(dest+0) ^ 0xffffffff, dest+0); |
| fb_writel(fb_readl(dest+4) ^ 0xffffffff, dest+4); |
| } |
| } |
| } |
| |
| void fbcon_cfb16_clear_margins(struct vc_data *conp, struct display *p, |
| int bottom_only) |
| { |
| int bytes = p->next_line; |
| u32 bgx; |
| |
| unsigned int right_start = conp->vc_cols*fontwidth(p); |
| unsigned int bottom_start = conp->vc_rows*fontheight(p); |
| unsigned int right_width, bottom_width; |
| |
| bgx = ((u16 *)p->dispsw_data)[attr_bgcol_ec(p, conp)]; |
| |
| if (!bottom_only && (right_width = p->var.xres-right_start)) |
| rectfill(p->screen_base+right_start*2, right_width, |
| p->var.yres_virtual, bgx, bytes); |
| if ((bottom_width = p->var.yres-bottom_start)) |
| rectfill(p->screen_base+(p->var.yoffset+bottom_start)*bytes, |
| right_start, bottom_width, bgx, bytes); |
| } |
| |
| |
| /* |
| * `switch' for the low level operations |
| */ |
| |
| struct display_switch fbcon_cfb16 = { |
| setup: fbcon_cfb16_setup, |
| bmove: fbcon_cfb16_bmove, |
| clear: fbcon_cfb16_clear, |
| putc: fbcon_cfb16_putc, |
| putcs: fbcon_cfb16_putcs, |
| revc: fbcon_cfb16_revc, |
| clear_margins: fbcon_cfb16_clear_margins, |
| fontwidthmask: FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16) |
| }; |
| |
| |
| #ifdef MODULE |
| MODULE_LICENSE("GPL"); |
| |
| int init_module(void) |
| { |
| return 0; |
| } |
| |
| void cleanup_module(void) |
| {} |
| #endif /* MODULE */ |
| |
| |
| /* |
| * Visible symbols for modules |
| */ |
| |
| EXPORT_SYMBOL(fbcon_cfb16); |
| EXPORT_SYMBOL(fbcon_cfb16_setup); |
| EXPORT_SYMBOL(fbcon_cfb16_bmove); |
| EXPORT_SYMBOL(fbcon_cfb16_clear); |
| EXPORT_SYMBOL(fbcon_cfb16_putc); |
| EXPORT_SYMBOL(fbcon_cfb16_putcs); |
| EXPORT_SYMBOL(fbcon_cfb16_revc); |
| EXPORT_SYMBOL(fbcon_cfb16_clear_margins); |