drivers/video/console/fbcon_ud.c

   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/string.h>
  13 #include <linux/fb.h>
  14 #include <linux/vt_kern.h>
  15 #include <linux/console.h>
  16 #include <asm/types.h>
  17 #include "fbcon.h"
  18 #include "fbcon_rotate.h"
  19
  20 /*
  21  * Rotation 180 degrees
  22  */
  23
  24 static inline void ud_update_attr(u8 *dst, u8 *src, int attribute,
  25                                   struct vc_data *vc)
  26 {
  27         int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
  28         int width = (vc->vc_font.width + 7) >> 3;
  29         unsigned int cellsize = vc->vc_font.height * width;
  30         u8 c;
  31
  32         offset = offset * width;
  33
  34         for (i = 0; i < cellsize; i++) {
  35                 c = src[i];
  36                 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i < offset)
  37                         c = 0xff;
  38                 if (attribute & FBCON_ATTRIBUTE_BOLD)
  39                         c |= c << 1;
  40                 if (attribute & FBCON_ATTRIBUTE_REVERSE)
  41                         c = ~c;
  42                 dst[i] = c;
  43         }
  44 }
  45
  46
  47 static void ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,
  48                      int sx, int dy, int dx, int height, int width)
  49 {
  50         struct fbcon_ops *ops = info->fbcon_par;
  51         struct fb_copyarea area;
  52         u32 vyres = GETVYRES(ops->p->scrollmode, info);
  53         u32 vxres = GETVXRES(ops->p->scrollmode, info);
  54
  55         area.sy = vyres - ((sy + height) * vc->vc_font.height);
  56         area.sx = vxres - ((sx + width) * vc->vc_font.width);
  57         area.dy = vyres - ((dy + height) * vc->vc_font.height);
  58         area.dx = vxres - ((dx + width) * vc->vc_font.width);
  59         area.height = height * vc->vc_font.height;
  60         area.width  = width * vc->vc_font.width;
  61
  62         info->fbops->fb_copyarea(info, &area);
  63 }
  64
  65 static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
  66                      int sx, int height, int width)
  67 {
  68         struct fbcon_ops *ops = info->fbcon_par;
  69         struct fb_fillrect region;
  70         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
  71         u32 vyres = GETVYRES(ops->p->scrollmode, info);
  72         u32 vxres = GETVXRES(ops->p->scrollmode, info);
  73
  74         region.color = attr_bgcol_ec(bgshift,vc);
  75         region.dy = vyres - ((sy + height) * vc->vc_font.height);
  76         region.dx = vxres - ((sx + width) *  vc->vc_font.width);
  77         region.width = width * vc->vc_font.width;
  78         region.height = height * vc->vc_font.height;
  79         region.rop = ROP_COPY;
  80
  81         info->fbops->fb_fillrect(info, &region);
  82 }
  83
  84 static inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,
  85                                     const u16 *s, u32 attr, u32 cnt,
  86                                     u32 d_pitch, u32 s_pitch, u32 cellsize,
  87                                     struct fb_image *image, u8 *buf, u8 *dst)
  88 {
  89         struct fbcon_ops *ops = info->fbcon_par;
  90         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
  91         u32 idx = vc->vc_font.width >> 3;
  92         u8 *src;
  93
  94         while (cnt--) {
  95                 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
  96
  97                 if (attr) {
  98                         ud_update_attr(buf, src, attr, vc);
  99                         src = buf;
 100                 }
 101
 102                 if (likely(idx == 1))
 103                         __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
 104                                                 image->height);
 105                 else
 106                         fb_pad_aligned_buffer(dst, d_pitch, src, idx,
 107                                               image->height);
 108
 109                 dst += s_pitch;
 110         }
 111
 112         info->fbops->fb_imageblit(info, image);
 113 }
 114
 115 static inline void ud_putcs_unaligned(struct vc_data *vc,
 116                                       struct fb_info *info, const u16 *s,
 117                                       u32 attr, u32 cnt, u32 d_pitch,
 118                                       u32 s_pitch, u32 cellsize,
 119                                       struct fb_image *image, u8 *buf,
 120                                       u8 *dst)
 121 {
 122         struct fbcon_ops *ops = info->fbcon_par;
 123         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 124         u32 shift_low = 0, mod = vc->vc_font.width % 8;
 125         u32 shift_high = 8;
 126         u32 idx = vc->vc_font.width >> 3;
 127         u8 *src;
 128
 129         while (cnt--) {
 130                 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
 131
 132                 if (attr) {
 133                         ud_update_attr(buf, src, attr, vc);
 134                         src = buf;
 135                 }
 136
 137                 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
 138                                         image->height, shift_high,
 139                                         shift_low, mod);
 140                 shift_low += mod;
 141                 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
 142                 shift_low &= 7;
 143                 shift_high = 8 - shift_low;
 144         }
 145
 146         info->fbops->fb_imageblit(info, image);
 147
 148 }
 149
 150 static void ud_putcs(struct vc_data *vc, struct fb_info *info,
 151                       const unsigned short *s, int count, int yy, int xx,
 152                       int fg, int bg)
 153 {
 154         struct fb_image image;
 155         struct fbcon_ops *ops = info->fbcon_par;
 156         u32 width = (vc->vc_font.width + 7)/8;
 157         u32 cellsize = width * vc->vc_font.height;
 158         u32 maxcnt = info->pixmap.size/cellsize;
 159         u32 scan_align = info->pixmap.scan_align - 1;
 160         u32 buf_align = info->pixmap.buf_align - 1;
 161         u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
 162         u32 attribute = get_attribute(info, scr_readw(s));
 163         u8 *dst, *buf = NULL;
 164         u32 vyres = GETVYRES(ops->p->scrollmode, info);
 165         u32 vxres = GETVXRES(ops->p->scrollmode, info);
 166
 167         if (!ops->fontbuffer)
 168                 return;
 169
 170         image.fg_color = fg;
 171         image.bg_color = bg;
 172         image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
 173         image.dx = vxres - ((xx + count) * vc->vc_font.width);
 174         image.height = vc->vc_font.height;
 175         image.depth = 1;
 176
 177         if (attribute) {
 178                 buf = kmalloc(cellsize, GFP_KERNEL);
 179                 if (!buf)
 180                         return;
 181         }
 182
 183         s += count - 1;
 184
 185         while (count) {
 186                 if (count > maxcnt)
 187                         cnt = maxcnt;
 188                 else
 189                         cnt = count;
 190
 191                 image.width = vc->vc_font.width * cnt;
 192                 pitch = ((image.width + 7) >> 3) + scan_align;
 193                 pitch &= ~scan_align;
 194                 size = pitch * image.height + buf_align;
 195                 size &= ~buf_align;
 196                 dst = fb_get_buffer_offset(info, &info->pixmap, size);
 197                 image.data = dst;
 198
 199                 if (!mod)
 200                         ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
 201                                          width, cellsize, &image, buf, dst);
 202                 else
 203                         ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
 204                                            width, cellsize, &image,
 205                                            buf, dst);
 206
 207                 image.dx += image.width;
 208                 count -= cnt;
 209                 s -= cnt;
 210                 xx += cnt;
 211         }
 212
 213         /* buf is always NULL except when in monochrome mode, so in this case
 214            it's a gain to check buf against NULL even though kfree() handles
 215            NULL pointers just fine */
 216         if (unlikely(buf))
 217                 kfree(buf);
 218
 219 }
 220
 221 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
 222                              int bottom_only)
 223 {
 224         unsigned int cw = vc->vc_font.width;
 225         unsigned int ch = vc->vc_font.height;
 226         unsigned int rw = info->var.xres - (vc->vc_cols*cw);
 227         unsigned int bh = info->var.yres - (vc->vc_rows*ch);
 228         struct fb_fillrect region;
 229         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
 230
 231         region.color = attr_bgcol_ec(bgshift,vc);
 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
 251 static 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
 418 static 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
 439 void 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 }
 448 EXPORT_SYMBOL(fbcon_rotate_ud);
 449
 450 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
 451 MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");
 452 MODULE_LICENSE("GPL");