drivers/video/console/fbcon_ccw.c

   1 /*
   2  *  linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 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 270 degrees
  23  */
  24
  25 static void ccw_update_attr(u8 *dst, u8 *src, int attribute,
  26                                   struct vc_data *vc)
  27 {
  28         int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
  29         int width = (vc->vc_font.height + 7) >> 3;
  30         int mod = vc->vc_font.height % 8;
  31         u8 c, msk = ~(0xff << offset), msk1 = 0;
  32
  33         if (mod)
  34                 msk <<= (8 - mod);
  35
  36         if (offset > mod)
  37                 msk1 |= 0x01;
  38
  39         for (i = 0; i < vc->vc_font.width; i++) {
  40                 for (j = 0; j < width; j++) {
  41                         c = *src;
  42
  43                         if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
  44                                 if (j == width - 1)
  45                                         c |= msk;
  46
  47                                 if (msk1 && j == width - 2)
  48                                         c |= msk1;
  49                         }
  50
  51                         if (attribute & FBCON_ATTRIBUTE_BOLD && i)
  52                                 *(dst - width) |= c;
  53
  54                         if (attribute & FBCON_ATTRIBUTE_REVERSE)
  55                                 c = ~c;
  56                         src++;
  57                         *dst++ = c;
  58                 }
  59         }
  60 }
  61
  62
  63 static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
  64                      int sx, int dy, int dx, int height, int width)
  65 {
  66         struct fbcon_ops *ops = info->fbcon_par;
  67         struct fb_copyarea area;
  68         u32 vyres = GETVYRES(ops->p->scrollmode, info);
  69
  70         area.sx = sy * vc->vc_font.height;
  71         area.sy = vyres - ((sx + width) * vc->vc_font.width);
  72         area.dx = dy * vc->vc_font.height;
  73         area.dy = vyres - ((dx + width) * vc->vc_font.width);
  74         area.width = height * vc->vc_font.height;
  75         area.height  = width * vc->vc_font.width;
  76
  77         info->fbops->fb_copyarea(info, &area);
  78 }
  79
  80 static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
  81                      int sx, int height, int width)
  82 {
  83         struct fbcon_ops *ops = info->fbcon_par;
  84         struct fb_fillrect region;
  85         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
  86         u32 vyres = GETVYRES(ops->p->scrollmode, info);
  87
  88         region.color = attr_bgcol_ec(bgshift,vc,info);
  89         region.dx = sy * vc->vc_font.height;
  90         region.dy = vyres - ((sx + width) * vc->vc_font.width);
  91         region.height = width * vc->vc_font.width;
  92         region.width = height * vc->vc_font.height;
  93         region.rop = ROP_COPY;
  94
  95         info->fbops->fb_fillrect(info, &region);
  96 }
  97
  98 static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
  99                                     const u16 *s, u32 attr, u32 cnt,
 100                                     u32 d_pitch, u32 s_pitch, u32 cellsize,
 101                                     struct fb_image *image, u8 *buf, u8 *dst)
 102 {
 103         struct fbcon_ops *ops = info->fbcon_par;
 104         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 105         u32 idx = (vc->vc_font.height + 7) >> 3;
 106         u8 *src;
 107
 108         while (cnt--) {
 109                 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
 110
 111                 if (attr) {
 112                         ccw_update_attr(buf, src, attr, vc);
 113                         src = buf;
 114                 }
 115
 116                 if (likely(idx == 1))
 117                         __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
 118                                                 vc->vc_font.width);
 119                 else
 120                         fb_pad_aligned_buffer(dst, d_pitch, src, idx,
 121                                               vc->vc_font.width);
 122
 123                 dst += d_pitch * vc->vc_font.width;
 124         }
 125
 126         info->fbops->fb_imageblit(info, image);
 127 }
 128
 129 static void ccw_putcs(struct vc_data *vc, struct fb_info *info,
 130                       const unsigned short *s, int count, int yy, int xx,
 131                       int fg, int bg)
 132 {
 133         struct fb_image image;
 134         struct fbcon_ops *ops = info->fbcon_par;
 135         u32 width = (vc->vc_font.height + 7)/8;
 136         u32 cellsize = width * vc->vc_font.width;
 137         u32 maxcnt = info->pixmap.size/cellsize;
 138         u32 scan_align = info->pixmap.scan_align - 1;
 139         u32 buf_align = info->pixmap.buf_align - 1;
 140         u32 cnt, pitch, size;
 141         u32 attribute = get_attribute(info, scr_readw(s));
 142         u8 *dst, *buf = NULL;
 143         u32 vyres = GETVYRES(ops->p->scrollmode, info);
 144
 145         if (!ops->fontbuffer)
 146                 return;
 147
 148         image.fg_color = fg;
 149         image.bg_color = bg;
 150         image.dx = yy * vc->vc_font.height;
 151         image.dy = vyres - ((xx + count) * vc->vc_font.width);
 152         image.width = vc->vc_font.height;
 153         image.depth = 1;
 154
 155         if (attribute) {
 156                 buf = kmalloc(cellsize, GFP_KERNEL);
 157                 if (!buf)
 158                         return;
 159         }
 160
 161         s += count - 1;
 162
 163         while (count) {
 164                 if (count > maxcnt)
 165                         cnt = maxcnt;
 166                 else
 167                         cnt = count;
 168
 169                 image.height = vc->vc_font.width * cnt;
 170                 pitch = ((image.width + 7) >> 3) + scan_align;
 171                 pitch &= ~scan_align;
 172                 size = pitch * image.height + buf_align;
 173                 size &= ~buf_align;
 174                 dst = fb_get_buffer_offset(info, &info->pixmap, size);
 175                 image.data = dst;
 176                 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
 177                                  width, cellsize, &image, buf, dst);
 178                 image.dy += image.height;
 179                 count -= cnt;
 180                 s -= cnt;
 181         }
 182
 183         /* buf is always NULL except when in monochrome mode, so in this case
 184            it's a gain to check buf against NULL even though kfree() handles
 185            NULL pointers just fine */
 186         if (unlikely(buf))
 187                 kfree(buf);
 188
 189 }
 190
 191 static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
 192                              int bottom_only)
 193 {
 194         unsigned int cw = vc->vc_font.width;
 195         unsigned int ch = vc->vc_font.height;
 196         unsigned int rw = info->var.yres - (vc->vc_cols*cw);
 197         unsigned int bh = info->var.xres - (vc->vc_rows*ch);
 198         unsigned int bs = vc->vc_rows*ch;
 199         struct fb_fillrect region;
 200         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
 201
 202         region.color = attr_bgcol_ec(bgshift,vc,info);
 203         region.rop = ROP_COPY;
 204
 205         if (rw && !bottom_only) {
 206                 region.dx = 0;
 207                 region.dy = info->var.yoffset;
 208                 region.height = rw;
 209                 region.width = info->var.xres_virtual;
 210                 info->fbops->fb_fillrect(info, &region);
 211         }
 212
 213         if (bh) {
 214                 region.dx = info->var.xoffset + bs;
 215                 region.dy = 0;
 216                 region.height = info->var.yres_virtual;
 217                 region.width = bh;
 218                 info->fbops->fb_fillrect(info, &region);
 219         }
 220 }
 221
 222 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 223                        int softback_lines, int fg, int bg)
 224 {
 225         struct fb_cursor cursor;
 226         struct fbcon_ops *ops = info->fbcon_par;
 227         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 228         int w = (vc->vc_font.height + 7) >> 3, c;
 229         int y = real_y(ops->p, vc->vc_y);
 230         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
 231         int err = 1, dx, dy;
 232         char *src;
 233         u32 vyres = GETVYRES(ops->p->scrollmode, info);
 234
 235         if (!ops->fontbuffer)
 236                 return;
 237
 238         cursor.set = 0;
 239
 240         if (softback_lines) {
 241                 if (y + softback_lines >= vc->vc_rows) {
 242                         mode = CM_ERASE;
 243                         ops->cursor_flash = 0;
 244                         return;
 245                 } else
 246                         y += softback_lines;
 247         }
 248
 249         c = scr_readw((u16 *) vc->vc_pos);
 250         attribute = get_attribute(info, c);
 251         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
 252
 253         if (ops->cursor_state.image.data != src ||
 254             ops->cursor_reset) {
 255             ops->cursor_state.image.data = src;
 256             cursor.set |= FB_CUR_SETIMAGE;
 257         }
 258
 259         if (attribute) {
 260                 u8 *dst;
 261
 262                 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
 263                 if (!dst)
 264                         return;
 265                 kfree(ops->cursor_data);
 266                 ops->cursor_data = dst;
 267                 ccw_update_attr(dst, src, attribute, vc);
 268                 src = dst;
 269         }
 270
 271         if (ops->cursor_state.image.fg_color != fg ||
 272             ops->cursor_state.image.bg_color != bg ||
 273             ops->cursor_reset) {
 274                 ops->cursor_state.image.fg_color = fg;
 275                 ops->cursor_state.image.bg_color = bg;
 276                 cursor.set |= FB_CUR_SETCMAP;
 277         }
 278
 279         if (ops->cursor_state.image.height != vc->vc_font.width ||
 280             ops->cursor_state.image.width != vc->vc_font.height ||
 281             ops->cursor_reset) {
 282                 ops->cursor_state.image.height = vc->vc_font.width;
 283                 ops->cursor_state.image.width = vc->vc_font.height;
 284                 cursor.set |= FB_CUR_SETSIZE;
 285         }
 286
 287         dx = y * vc->vc_font.height;
 288         dy = vyres - ((vc->vc_x + 1) * vc->vc_font.width);
 289
 290         if (ops->cursor_state.image.dx != dx ||
 291             ops->cursor_state.image.dy != dy ||
 292             ops->cursor_reset) {
 293                 ops->cursor_state.image.dx = dx;
 294                 ops->cursor_state.image.dy = dy;
 295                 cursor.set |= FB_CUR_SETPOS;
 296         }
 297
 298         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
 299             ops->cursor_reset) {
 300                 ops->cursor_state.hot.x = cursor.hot.y = 0;
 301                 cursor.set |= FB_CUR_SETHOT;
 302         }
 303
 304         if (cursor.set & FB_CUR_SETSIZE ||
 305             vc->vc_cursor_type != ops->p->cursor_shape ||
 306             ops->cursor_state.mask == NULL ||
 307             ops->cursor_reset) {
 308                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
 309                 int cur_height, size, i = 0;
 310                 int width = (vc->vc_font.width + 7)/8;
 311
 312                 if (!mask)
 313                         return;
 314
 315                 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
 316
 317                 if (!tmp) {
 318                         kfree(mask);
 319                         return;
 320                 }
 321
 322                 kfree(ops->cursor_state.mask);
 323                 ops->cursor_state.mask = mask;
 324
 325                 ops->p->cursor_shape = vc->vc_cursor_type;
 326                 cursor.set |= FB_CUR_SETSHAPE;
 327
 328                 switch (ops->p->cursor_shape & CUR_HWMASK) {
 329                 case CUR_NONE:
 330                         cur_height = 0;
 331                         break;
 332                 case CUR_UNDERLINE:
 333                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
 334                         break;
 335                 case CUR_LOWER_THIRD:
 336                         cur_height = vc->vc_font.height/3;
 337                         break;
 338                 case CUR_LOWER_HALF:
 339                         cur_height = vc->vc_font.height >> 1;
 340                         break;
 341                 case CUR_TWO_THIRDS:
 342                         cur_height = (vc->vc_font.height << 1)/3;
 343                         break;
 344                 case CUR_BLOCK:
 345                 default:
 346                         cur_height = vc->vc_font.height;
 347                         break;
 348                 }
 349
 350                 size = (vc->vc_font.height - cur_height) * width;
 351                 while (size--)
 352                         tmp[i++] = 0;
 353                 size = cur_height * width;
 354                 while (size--)
 355                         tmp[i++] = 0xff;
 356                 memset(mask, 0, w * vc->vc_font.width);
 357                 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
 358                 kfree(tmp);
 359         }
 360
 361         switch (mode) {
 362         case CM_ERASE:
 363                 ops->cursor_state.enable = 0;
 364                 break;
 365         case CM_DRAW:
 366         case CM_MOVE:
 367         default:
 368                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
 369                 break;
 370         }
 371
 372         cursor.image.data = src;
 373         cursor.image.fg_color = ops->cursor_state.image.fg_color;
 374         cursor.image.bg_color = ops->cursor_state.image.bg_color;
 375         cursor.image.dx = ops->cursor_state.image.dx;
 376         cursor.image.dy = ops->cursor_state.image.dy;
 377         cursor.image.height = ops->cursor_state.image.height;
 378         cursor.image.width = ops->cursor_state.image.width;
 379         cursor.hot.x = ops->cursor_state.hot.x;
 380         cursor.hot.y = ops->cursor_state.hot.y;
 381         cursor.mask = ops->cursor_state.mask;
 382         cursor.enable = ops->cursor_state.enable;
 383         cursor.image.depth = 1;
 384         cursor.rop = ROP_XOR;
 385
 386         if (info->fbops->fb_cursor)
 387                 err = info->fbops->fb_cursor(info, &cursor);
 388
 389         if (err)
 390                 soft_cursor(info, &cursor);
 391
 392         ops->cursor_reset = 0;
 393 }
 394
 395 static int ccw_update_start(struct fb_info *info)
 396 {
 397         struct fbcon_ops *ops = info->fbcon_par;
 398         u32 yoffset;
 399         u32 vyres = GETVYRES(ops->p->scrollmode, info);
 400         int err;
 401
 402         yoffset = (vyres - info->var.yres) - ops->var.xoffset;
 403         ops->var.xoffset = ops->var.yoffset;
 404         ops->var.yoffset = yoffset;
 405         err = fb_pan_display(info, &ops->var);
 406         ops->var.xoffset = info->var.xoffset;
 407         ops->var.yoffset = info->var.yoffset;
 408         ops->var.vmode = info->var.vmode;
 409         return err;
 410 }
 411
 412 void fbcon_rotate_ccw(struct fbcon_ops *ops)
 413 {
 414         ops->bmove = ccw_bmove;
 415         ops->clear = ccw_clear;
 416         ops->putcs = ccw_putcs;
 417         ops->clear_margins = ccw_clear_margins;
 418         ops->cursor = ccw_cursor;
 419         ops->update_start = ccw_update_start;
 420 }
 421 EXPORT_SYMBOL(fbcon_rotate_ccw);
 422
 423 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
 424 MODULE_DESCRIPTION("Console Rotation (270 degrees) Support");
 425 MODULE_LICENSE("GPL");