linux/drivers/video/fbdev/core/fbcon_ud.c
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   1/*
   2 *  linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 180 degrees
   3 *
   4 *      Copyright (C) 2005 Antonino Daplas <adaplas @pol.net>
   5 *
   6 *  This file is subject to the terms and conditions of the GNU General Public
   7 *  License.  See the file COPYING in the main directory of this archive for
   8 *  more details.
   9 */
  10
  11#include <linux/module.h>
  12#include <linux/slab.h>
  13#include <linux/string.h>
  14#include <linux/fb.h>
  15#include <linux/vt_kern.h>
  16#include <linux/console.h>
  17#include <asm/types.h>
  18#include "fbcon.h"
  19#include "fbcon_rotate.h"
  20
  21/*
  22 * Rotation 180 degrees
  23 */
  24
  25static void ud_update_attr(u8 *dst, u8 *src, int attribute,
  26                                  struct vc_data *vc)
  27{
  28        int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
  29        int width = (vc->vc_font.width + 7) >> 3;
  30        unsigned int cellsize = vc->vc_font.height * width;
  31        u8 c;
  32
  33        offset = offset * width;
  34
  35        for (i = 0; i < cellsize; i++) {
  36                c = src[i];
  37                if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i < offset)
  38                        c = 0xff;
  39                if (attribute & FBCON_ATTRIBUTE_BOLD)
  40                        c |= c << 1;
  41                if (attribute & FBCON_ATTRIBUTE_REVERSE)
  42                        c = ~c;
  43                dst[i] = c;
  44        }
  45}
  46
  47
  48static void ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,
  49                     int sx, int dy, int dx, int height, int width)
  50{
  51        struct fbcon_ops *ops = info->fbcon_par;
  52        struct fb_copyarea area;
  53        u32 vyres = GETVYRES(ops->p->scrollmode, info);
  54        u32 vxres = GETVXRES(ops->p->scrollmode, info);
  55
  56        area.sy = vyres - ((sy + height) * vc->vc_font.height);
  57        area.sx = vxres - ((sx + width) * vc->vc_font.width);
  58        area.dy = vyres - ((dy + height) * vc->vc_font.height);
  59        area.dx = vxres - ((dx + width) * vc->vc_font.width);
  60        area.height = height * vc->vc_font.height;
  61        area.width  = width * vc->vc_font.width;
  62
  63        info->fbops->fb_copyarea(info, &area);
  64}
  65
  66static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
  67                     int sx, int height, int width)
  68{
  69        struct fbcon_ops *ops = info->fbcon_par;
  70        struct fb_fillrect region;
  71        int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
  72        u32 vyres = GETVYRES(ops->p->scrollmode, info);
  73        u32 vxres = GETVXRES(ops->p->scrollmode, info);
  74
  75        region.color = attr_bgcol_ec(bgshift,vc,info);
  76        region.dy = vyres - ((sy + height) * vc->vc_font.height);
  77        region.dx = vxres - ((sx + width) *  vc->vc_font.width);
  78        region.width = width * vc->vc_font.width;
  79        region.height = height * vc->vc_font.height;
  80        region.rop = ROP_COPY;
  81
  82        info->fbops->fb_fillrect(info, &region);
  83}
  84
  85static inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,
  86                                    const u16 *s, u32 attr, u32 cnt,
  87                                    u32 d_pitch, u32 s_pitch, u32 cellsize,
  88                                    struct fb_image *image, u8 *buf, u8 *dst)
  89{
  90        struct fbcon_ops *ops = info->fbcon_par;
  91        u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
  92        u32 idx = vc->vc_font.width >> 3;
  93        u8 *src;
  94
  95        while (cnt--) {
  96                src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
  97
  98                if (attr) {
  99                        ud_update_attr(buf, src, attr, vc);
 100                        src = buf;
 101                }
 102
 103                if (likely(idx == 1))
 104                        __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
 105                                                image->height);
 106                else
 107                        fb_pad_aligned_buffer(dst, d_pitch, src, idx,
 108                                              image->height);
 109
 110                dst += s_pitch;
 111        }
 112
 113        info->fbops->fb_imageblit(info, image);
 114}
 115
 116static inline void ud_putcs_unaligned(struct vc_data *vc,
 117                                      struct fb_info *info, const u16 *s,
 118                                      u32 attr, u32 cnt, u32 d_pitch,
 119                                      u32 s_pitch, u32 cellsize,
 120                                      struct fb_image *image, u8 *buf,
 121                                      u8 *dst)
 122{
 123        struct fbcon_ops *ops = info->fbcon_par;
 124        u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 125        u32 shift_low = 0, mod = vc->vc_font.width % 8;
 126        u32 shift_high = 8;
 127        u32 idx = vc->vc_font.width >> 3;
 128        u8 *src;
 129
 130        while (cnt--) {
 131                src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
 132
 133                if (attr) {
 134                        ud_update_attr(buf, src, attr, vc);
 135                        src = buf;
 136                }
 137
 138                fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
 139                                        image->height, shift_high,
 140                                        shift_low, mod);
 141                shift_low += mod;
 142                dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
 143                shift_low &= 7;
 144                shift_high = 8 - shift_low;
 145        }
 146
 147        info->fbops->fb_imageblit(info, image);
 148
 149}
 150
 151static void ud_putcs(struct vc_data *vc, struct fb_info *info,
 152                      const unsigned short *s, int count, int yy, int xx,
 153                      int fg, int bg)
 154{
 155        struct fb_image image;
 156        struct fbcon_ops *ops = info->fbcon_par;
 157        u32 width = (vc->vc_font.width + 7)/8;
 158        u32 cellsize = width * vc->vc_font.height;
 159        u32 maxcnt = info->pixmap.size/cellsize;
 160        u32 scan_align = info->pixmap.scan_align - 1;
 161        u32 buf_align = info->pixmap.buf_align - 1;
 162        u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
 163        u32 attribute = get_attribute(info, scr_readw(s));
 164        u8 *dst, *buf = NULL;
 165        u32 vyres = GETVYRES(ops->p->scrollmode, info);
 166        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 167
 168        if (!ops->fontbuffer)
 169                return;
 170
 171        image.fg_color = fg;
 172        image.bg_color = bg;
 173        image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
 174        image.dx = vxres - ((xx + count) * vc->vc_font.width);
 175        image.height = vc->vc_font.height;
 176        image.depth = 1;
 177
 178        if (attribute) {
 179                buf = kmalloc(cellsize, GFP_KERNEL);
 180                if (!buf)
 181                        return;
 182        }
 183
 184        s += count - 1;
 185
 186        while (count) {
 187                if (count > maxcnt)
 188                        cnt = maxcnt;
 189                else
 190                        cnt = count;
 191
 192                image.width = vc->vc_font.width * cnt;
 193                pitch = ((image.width + 7) >> 3) + scan_align;
 194                pitch &= ~scan_align;
 195                size = pitch * image.height + buf_align;
 196                size &= ~buf_align;
 197                dst = fb_get_buffer_offset(info, &info->pixmap, size);
 198                image.data = dst;
 199
 200                if (!mod)
 201                        ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
 202                                         width, cellsize, &image, buf, dst);
 203                else
 204                        ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
 205                                           width, cellsize, &image,
 206                                           buf, dst);
 207
 208                image.dx += image.width;
 209                count -= cnt;
 210                s -= cnt;
 211                xx += cnt;
 212        }
 213
 214        /* buf is always NULL except when in monochrome mode, so in this case
 215           it's a gain to check buf against NULL even though kfree() handles
 216           NULL pointers just fine */
 217        if (unlikely(buf))
 218                kfree(buf);
 219
 220}
 221
 222static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
 223                             int color, int bottom_only)
 224{
 225        unsigned int cw = vc->vc_font.width;
 226        unsigned int ch = vc->vc_font.height;
 227        unsigned int rw = info->var.xres - (vc->vc_cols*cw);
 228        unsigned int bh = info->var.yres - (vc->vc_rows*ch);
 229        struct fb_fillrect region;
 230
 231        region.color = color;
 232        region.rop = ROP_COPY;
 233
 234        if (rw && !bottom_only) {
 235                region.dy = 0;
 236                region.dx = info->var.xoffset;
 237                region.width  = rw;
 238                region.height = info->var.yres_virtual;
 239                info->fbops->fb_fillrect(info, &region);
 240        }
 241
 242        if (bh) {
 243                region.dy = info->var.yoffset;
 244                region.dx = info->var.xoffset;
 245                region.height  = bh;
 246                region.width = info->var.xres;
 247                info->fbops->fb_fillrect(info, &region);
 248        }
 249}
 250
 251static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 252                      int softback_lines, int fg, int bg)
 253{
 254        struct fb_cursor cursor;
 255        struct fbcon_ops *ops = info->fbcon_par;
 256        unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 257        int w = (vc->vc_font.width + 7) >> 3, c;
 258        int y = real_y(ops->p, vc->vc_y);
 259        int attribute, use_sw = (vc->vc_cursor_type & 0x10);
 260        int err = 1, dx, dy;
 261        char *src;
 262        u32 vyres = GETVYRES(ops->p->scrollmode, info);
 263        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 264
 265        if (!ops->fontbuffer)
 266                return;
 267
 268        cursor.set = 0;
 269
 270        if (softback_lines) {
 271                if (y + softback_lines >= vc->vc_rows) {
 272                        mode = CM_ERASE;
 273                        ops->cursor_flash = 0;
 274                        return;
 275                } else
 276                        y += softback_lines;
 277        }
 278
 279        c = scr_readw((u16 *) vc->vc_pos);
 280        attribute = get_attribute(info, c);
 281        src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
 282
 283        if (ops->cursor_state.image.data != src ||
 284            ops->cursor_reset) {
 285            ops->cursor_state.image.data = src;
 286            cursor.set |= FB_CUR_SETIMAGE;
 287        }
 288
 289        if (attribute) {
 290                u8 *dst;
 291
 292                dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
 293                if (!dst)
 294                        return;
 295                kfree(ops->cursor_data);
 296                ops->cursor_data = dst;
 297                ud_update_attr(dst, src, attribute, vc);
 298                src = dst;
 299        }
 300
 301        if (ops->cursor_state.image.fg_color != fg ||
 302            ops->cursor_state.image.bg_color != bg ||
 303            ops->cursor_reset) {
 304                ops->cursor_state.image.fg_color = fg;
 305                ops->cursor_state.image.bg_color = bg;
 306                cursor.set |= FB_CUR_SETCMAP;
 307        }
 308
 309        if (ops->cursor_state.image.height != vc->vc_font.height ||
 310            ops->cursor_state.image.width != vc->vc_font.width ||
 311            ops->cursor_reset) {
 312                ops->cursor_state.image.height = vc->vc_font.height;
 313                ops->cursor_state.image.width = vc->vc_font.width;
 314                cursor.set |= FB_CUR_SETSIZE;
 315        }
 316
 317        dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
 318        dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);
 319
 320        if (ops->cursor_state.image.dx != dx ||
 321            ops->cursor_state.image.dy != dy ||
 322            ops->cursor_reset) {
 323                ops->cursor_state.image.dx = dx;
 324                ops->cursor_state.image.dy = dy;
 325                cursor.set |= FB_CUR_SETPOS;
 326        }
 327
 328        if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
 329            ops->cursor_reset) {
 330                ops->cursor_state.hot.x = cursor.hot.y = 0;
 331                cursor.set |= FB_CUR_SETHOT;
 332        }
 333
 334        if (cursor.set & FB_CUR_SETSIZE ||
 335            vc->vc_cursor_type != ops->p->cursor_shape ||
 336            ops->cursor_state.mask == NULL ||
 337            ops->cursor_reset) {
 338                char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
 339                int cur_height, size, i = 0;
 340                u8 msk = 0xff;
 341
 342                if (!mask)
 343                        return;
 344
 345                kfree(ops->cursor_state.mask);
 346                ops->cursor_state.mask = mask;
 347
 348                ops->p->cursor_shape = vc->vc_cursor_type;
 349                cursor.set |= FB_CUR_SETSHAPE;
 350
 351                switch (ops->p->cursor_shape & CUR_HWMASK) {
 352                case CUR_NONE:
 353                        cur_height = 0;
 354                        break;
 355                case CUR_UNDERLINE:
 356                        cur_height = (vc->vc_font.height < 10) ? 1 : 2;
 357                        break;
 358                case CUR_LOWER_THIRD:
 359                        cur_height = vc->vc_font.height/3;
 360                        break;
 361                case CUR_LOWER_HALF:
 362                        cur_height = vc->vc_font.height >> 1;
 363                        break;
 364                case CUR_TWO_THIRDS:
 365                        cur_height = (vc->vc_font.height << 1)/3;
 366                        break;
 367                case CUR_BLOCK:
 368                default:
 369                        cur_height = vc->vc_font.height;
 370                        break;
 371                }
 372
 373                size = cur_height * w;
 374
 375                while (size--)
 376                        mask[i++] = msk;
 377
 378                size = (vc->vc_font.height - cur_height) * w;
 379
 380                while (size--)
 381                        mask[i++] = ~msk;
 382        }
 383
 384        switch (mode) {
 385        case CM_ERASE:
 386                ops->cursor_state.enable = 0;
 387                break;
 388        case CM_DRAW:
 389        case CM_MOVE:
 390        default:
 391                ops->cursor_state.enable = (use_sw) ? 0 : 1;
 392                break;
 393        }
 394
 395        cursor.image.data = src;
 396        cursor.image.fg_color = ops->cursor_state.image.fg_color;
 397        cursor.image.bg_color = ops->cursor_state.image.bg_color;
 398        cursor.image.dx = ops->cursor_state.image.dx;
 399        cursor.image.dy = ops->cursor_state.image.dy;
 400        cursor.image.height = ops->cursor_state.image.height;
 401        cursor.image.width = ops->cursor_state.image.width;
 402        cursor.hot.x = ops->cursor_state.hot.x;
 403        cursor.hot.y = ops->cursor_state.hot.y;
 404        cursor.mask = ops->cursor_state.mask;
 405        cursor.enable = ops->cursor_state.enable;
 406        cursor.image.depth = 1;
 407        cursor.rop = ROP_XOR;
 408
 409        if (info->fbops->fb_cursor)
 410                err = info->fbops->fb_cursor(info, &cursor);
 411
 412        if (err)
 413                soft_cursor(info, &cursor);
 414
 415        ops->cursor_reset = 0;
 416}
 417
 418static int ud_update_start(struct fb_info *info)
 419{
 420        struct fbcon_ops *ops = info->fbcon_par;
 421        int xoffset, yoffset;
 422        u32 vyres = GETVYRES(ops->p->scrollmode, info);
 423        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 424        int err;
 425
 426        xoffset = vxres - info->var.xres - ops->var.xoffset;
 427        yoffset = vyres - info->var.yres - ops->var.yoffset;
 428        if (yoffset < 0)
 429                yoffset += vyres;
 430        ops->var.xoffset = xoffset;
 431        ops->var.yoffset = yoffset;
 432        err = fb_pan_display(info, &ops->var);
 433        ops->var.xoffset = info->var.xoffset;
 434        ops->var.yoffset = info->var.yoffset;
 435        ops->var.vmode = info->var.vmode;
 436        return err;
 437}
 438
 439void fbcon_rotate_ud(struct fbcon_ops *ops)
 440{
 441        ops->bmove = ud_bmove;
 442        ops->clear = ud_clear;
 443        ops->putcs = ud_putcs;
 444        ops->clear_margins = ud_clear_margins;
 445        ops->cursor = ud_cursor;
 446        ops->update_start = ud_update_start;
 447}
 448EXPORT_SYMBOL(fbcon_rotate_ud);
 449