drivers/video/console/fbcon_cw.c

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