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/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
  25 static inline 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
  48 static 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
  66 static 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
  85 static 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
 116 static 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
 151 static 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
 222 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
 223                              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         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
 231
 232         region.color = attr_bgcol_ec(bgshift,vc,info);
 233         region.rop = ROP_COPY;
 234
 235         if (rw && !bottom_only) {
 236                 region.dy = 0;
 237                 region.dx = info->var.xoffset;
 238                 region.width  = rw;
 239                 region.height = info->var.yres_virtual;
 240                 info->fbops->fb_fillrect(info, &region);
 241         }
 242
 243         if (bh) {
 244                 region.dy = info->var.yoffset;
 245                 region.dx = info->var.xoffset;
 246                 region.height  = bh;
 247                 region.width = info->var.xres;
 248                 info->fbops->fb_fillrect(info, &region);
 249         }
 250 }
 251
 252 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 253                       int softback_lines, int fg, int bg)
 254 {
 255         struct fb_cursor cursor;
 256         struct fbcon_ops *ops = info->fbcon_par;
 257         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 258         int w = (vc->vc_font.width + 7) >> 3, c;
 259         int y = real_y(ops->p, vc->vc_y);
 260         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
 261         int err = 1, dx, dy;
 262         char *src;
 263         u32 vyres = GETVYRES(ops->p->scrollmode, info);
 264         u32 vxres = GETVXRES(ops->p->scrollmode, info);
 265
 266         if (!ops->fontbuffer)
 267                 return;
 268
 269         cursor.set = 0;
 270
 271         if (softback_lines) {
 272                 if (y + softback_lines >= vc->vc_rows) {
 273                         mode = CM_ERASE;
 274                         ops->cursor_flash = 0;
 275                         return;
 276                 } else
 277                         y += softback_lines;
 278         }
 279
 280         c = scr_readw((u16 *) vc->vc_pos);
 281         attribute = get_attribute(info, c);
 282         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
 283
 284         if (ops->cursor_state.image.data != src ||
 285             ops->cursor_reset) {
 286             ops->cursor_state.image.data = src;
 287             cursor.set |= FB_CUR_SETIMAGE;
 288         }
 289
 290         if (attribute) {
 291                 u8 *dst;
 292
 293                 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
 294                 if (!dst)
 295                         return;
 296                 kfree(ops->cursor_data);
 297                 ops->cursor_data = dst;
 298                 ud_update_attr(dst, src, attribute, vc);
 299                 src = dst;
 300         }
 301
 302         if (ops->cursor_state.image.fg_color != fg ||
 303             ops->cursor_state.image.bg_color != bg ||
 304             ops->cursor_reset) {
 305                 ops->cursor_state.image.fg_color = fg;
 306                 ops->cursor_state.image.bg_color = bg;
 307                 cursor.set |= FB_CUR_SETCMAP;
 308         }
 309
 310         if (ops->cursor_state.image.height != vc->vc_font.height ||
 311             ops->cursor_state.image.width != vc->vc_font.width ||
 312             ops->cursor_reset) {
 313                 ops->cursor_state.image.height = vc->vc_font.height;
 314                 ops->cursor_state.image.width = vc->vc_font.width;
 315                 cursor.set |= FB_CUR_SETSIZE;
 316         }
 317
 318         dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
 319         dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);
 320
 321         if (ops->cursor_state.image.dx != dx ||
 322             ops->cursor_state.image.dy != dy ||
 323             ops->cursor_reset) {
 324                 ops->cursor_state.image.dx = dx;
 325                 ops->cursor_state.image.dy = dy;
 326                 cursor.set |= FB_CUR_SETPOS;
 327         }
 328
 329         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
 330             ops->cursor_reset) {
 331                 ops->cursor_state.hot.x = cursor.hot.y = 0;
 332                 cursor.set |= FB_CUR_SETHOT;
 333         }
 334
 335         if (cursor.set & FB_CUR_SETSIZE ||
 336             vc->vc_cursor_type != ops->p->cursor_shape ||
 337             ops->cursor_state.mask == NULL ||
 338             ops->cursor_reset) {
 339                 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
 340                 int cur_height, size, i = 0;
 341                 u8 msk = 0xff;
 342
 343                 if (!mask)
 344                         return;
 345
 346                 kfree(ops->cursor_state.mask);
 347                 ops->cursor_state.mask = mask;
 348
 349                 ops->p->cursor_shape = vc->vc_cursor_type;
 350                 cursor.set |= FB_CUR_SETSHAPE;
 351
 352                 switch (ops->p->cursor_shape & CUR_HWMASK) {
 353                 case CUR_NONE:
 354                         cur_height = 0;
 355                         break;
 356                 case CUR_UNDERLINE:
 357                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
 358                         break;
 359                 case CUR_LOWER_THIRD:
 360                         cur_height = vc->vc_font.height/3;
 361                         break;
 362                 case CUR_LOWER_HALF:
 363                         cur_height = vc->vc_font.height >> 1;
 364                         break;
 365                 case CUR_TWO_THIRDS:
 366                         cur_height = (vc->vc_font.height << 1)/3;
 367                         break;
 368                 case CUR_BLOCK:
 369                 default:
 370                         cur_height = vc->vc_font.height;
 371                         break;
 372                 }
 373
 374                 size = cur_height * w;
 375
 376                 while (size--)
 377                         mask[i++] = msk;
 378
 379                 size = (vc->vc_font.height - cur_height) * w;
 380
 381                 while (size--)
 382                         mask[i++] = ~msk;
 383         }
 384
 385         switch (mode) {
 386         case CM_ERASE:
 387                 ops->cursor_state.enable = 0;
 388                 break;
 389         case CM_DRAW:
 390         case CM_MOVE:
 391         default:
 392                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
 393                 break;
 394         }
 395
 396         cursor.image.data = src;
 397         cursor.image.fg_color = ops->cursor_state.image.fg_color;
 398         cursor.image.bg_color = ops->cursor_state.image.bg_color;
 399         cursor.image.dx = ops->cursor_state.image.dx;
 400         cursor.image.dy = ops->cursor_state.image.dy;
 401         cursor.image.height = ops->cursor_state.image.height;
 402         cursor.image.width = ops->cursor_state.image.width;
 403         cursor.hot.x = ops->cursor_state.hot.x;
 404         cursor.hot.y = ops->cursor_state.hot.y;
 405         cursor.mask = ops->cursor_state.mask;
 406         cursor.enable = ops->cursor_state.enable;
 407         cursor.image.depth = 1;
 408         cursor.rop = ROP_XOR;
 409
 410         if (info->fbops->fb_cursor)
 411                 err = info->fbops->fb_cursor(info, &cursor);
 412
 413         if (err)
 414                 soft_cursor(info, &cursor);
 415
 416         ops->cursor_reset = 0;
 417 }
 418
 419 static int ud_update_start(struct fb_info *info)
 420 {
 421         struct fbcon_ops *ops = info->fbcon_par;
 422         int xoffset, yoffset;
 423         u32 vyres = GETVYRES(ops->p->scrollmode, info);
 424         u32 vxres = GETVXRES(ops->p->scrollmode, info);
 425         int err;
 426
 427         xoffset = vxres - info->var.xres - ops->var.xoffset;
 428         yoffset = vyres - info->var.yres - ops->var.yoffset;
 429         if (yoffset < 0)
 430                 yoffset += vyres;
 431         ops->var.xoffset = xoffset;
 432         ops->var.yoffset = yoffset;
 433         err = fb_pan_display(info, &ops->var);
 434         ops->var.xoffset = info->var.xoffset;
 435         ops->var.yoffset = info->var.yoffset;
 436         ops->var.vmode = info->var.vmode;
 437         return err;
 438 }
 439
 440 void fbcon_rotate_ud(struct fbcon_ops *ops)
 441 {
 442         ops->bmove = ud_bmove;
 443         ops->clear = ud_clear;
 444         ops->putcs = ud_putcs;
 445         ops->clear_margins = ud_clear_margins;
 446         ops->cursor = ud_cursor;
 447         ops->update_start = ud_update_start;
 448 }
 449 EXPORT_SYMBOL(fbcon_rotate_ud);
 450
 451 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
 452 MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");
 453 MODULE_LICENSE("GPL");