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