linux/drivers/video/fbdev/core/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 color, 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
 184        region.color = color;
 185        region.rop = ROP_COPY;
 186
 187        if ((int) rw > 0 && !bottom_only) {
 188                region.dx = 0;
 189                region.dy = info->var.yoffset + rs;
 190                region.height = rw;
 191                region.width = info->var.xres_virtual;
 192                info->fbops->fb_fillrect(info, &region);
 193        }
 194
 195        if ((int) bh > 0) {
 196                region.dx = info->var.xoffset;
 197                region.dy = info->var.yoffset;
 198                region.height = info->var.yres;
 199                region.width = bh;
 200                info->fbops->fb_fillrect(info, &region);
 201        }
 202}
 203
 204static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 205                      int fg, int bg)
 206{
 207        struct fb_cursor cursor;
 208        struct fbcon_ops *ops = info->fbcon_par;
 209        unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 210        int w = (vc->vc_font.height + 7) >> 3, c;
 211        int y = real_y(ops->p, vc->state.y);
 212        int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
 213        int err = 1, dx, dy;
 214        char *src;
 215        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 216
 217        if (!ops->fontbuffer)
 218                return;
 219
 220        cursor.set = 0;
 221
 222        c = scr_readw((u16 *) vc->vc_pos);
 223        attribute = get_attribute(info, c);
 224        src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
 225
 226        if (ops->cursor_state.image.data != src ||
 227            ops->cursor_reset) {
 228            ops->cursor_state.image.data = src;
 229            cursor.set |= FB_CUR_SETIMAGE;
 230        }
 231
 232        if (attribute) {
 233                u8 *dst;
 234
 235                dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC);
 236                if (!dst)
 237                        return;
 238                kfree(ops->cursor_data);
 239                ops->cursor_data = dst;
 240                cw_update_attr(dst, src, attribute, vc);
 241                src = dst;
 242        }
 243
 244        if (ops->cursor_state.image.fg_color != fg ||
 245            ops->cursor_state.image.bg_color != bg ||
 246            ops->cursor_reset) {
 247                ops->cursor_state.image.fg_color = fg;
 248                ops->cursor_state.image.bg_color = bg;
 249                cursor.set |= FB_CUR_SETCMAP;
 250        }
 251
 252        if (ops->cursor_state.image.height != vc->vc_font.width ||
 253            ops->cursor_state.image.width != vc->vc_font.height ||
 254            ops->cursor_reset) {
 255                ops->cursor_state.image.height = vc->vc_font.width;
 256                ops->cursor_state.image.width = vc->vc_font.height;
 257                cursor.set |= FB_CUR_SETSIZE;
 258        }
 259
 260        dx = vxres - ((y * vc->vc_font.height) + vc->vc_font.height);
 261        dy = vc->state.x * vc->vc_font.width;
 262
 263        if (ops->cursor_state.image.dx != dx ||
 264            ops->cursor_state.image.dy != dy ||
 265            ops->cursor_reset) {
 266                ops->cursor_state.image.dx = dx;
 267                ops->cursor_state.image.dy = dy;
 268                cursor.set |= FB_CUR_SETPOS;
 269        }
 270
 271        if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
 272            ops->cursor_reset) {
 273                ops->cursor_state.hot.x = cursor.hot.y = 0;
 274                cursor.set |= FB_CUR_SETHOT;
 275        }
 276
 277        if (cursor.set & FB_CUR_SETSIZE ||
 278            vc->vc_cursor_type != ops->p->cursor_shape ||
 279            ops->cursor_state.mask == NULL ||
 280            ops->cursor_reset) {
 281                char *tmp, *mask = kmalloc_array(w, vc->vc_font.width,
 282                                                 GFP_ATOMIC);
 283                int cur_height, size, i = 0;
 284                int width = (vc->vc_font.width + 7)/8;
 285
 286                if (!mask)
 287                        return;
 288
 289                tmp = kmalloc_array(width, vc->vc_font.height, GFP_ATOMIC);
 290
 291                if (!tmp) {
 292                        kfree(mask);
 293                        return;
 294                }
 295
 296                kfree(ops->cursor_state.mask);
 297                ops->cursor_state.mask = mask;
 298
 299                ops->p->cursor_shape = vc->vc_cursor_type;
 300                cursor.set |= FB_CUR_SETSHAPE;
 301
 302                switch (CUR_SIZE(ops->p->cursor_shape)) {
 303                case CUR_NONE:
 304                        cur_height = 0;
 305                        break;
 306                case CUR_UNDERLINE:
 307                        cur_height = (vc->vc_font.height < 10) ? 1 : 2;
 308                        break;
 309                case CUR_LOWER_THIRD:
 310                        cur_height = vc->vc_font.height/3;
 311                        break;
 312                case CUR_LOWER_HALF:
 313                        cur_height = vc->vc_font.height >> 1;
 314                        break;
 315                case CUR_TWO_THIRDS:
 316                        cur_height = (vc->vc_font.height << 1)/3;
 317                        break;
 318                case CUR_BLOCK:
 319                default:
 320                        cur_height = vc->vc_font.height;
 321                        break;
 322                }
 323
 324                size = (vc->vc_font.height - cur_height) * width;
 325                while (size--)
 326                        tmp[i++] = 0;
 327                size = cur_height * width;
 328                while (size--)
 329                        tmp[i++] = 0xff;
 330                memset(mask, 0, w * vc->vc_font.width);
 331                rotate_cw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
 332                kfree(tmp);
 333        }
 334
 335        switch (mode) {
 336        case CM_ERASE:
 337                ops->cursor_state.enable = 0;
 338                break;
 339        case CM_DRAW:
 340        case CM_MOVE:
 341        default:
 342                ops->cursor_state.enable = (use_sw) ? 0 : 1;
 343                break;
 344        }
 345
 346        cursor.image.data = src;
 347        cursor.image.fg_color = ops->cursor_state.image.fg_color;
 348        cursor.image.bg_color = ops->cursor_state.image.bg_color;
 349        cursor.image.dx = ops->cursor_state.image.dx;
 350        cursor.image.dy = ops->cursor_state.image.dy;
 351        cursor.image.height = ops->cursor_state.image.height;
 352        cursor.image.width = ops->cursor_state.image.width;
 353        cursor.hot.x = ops->cursor_state.hot.x;
 354        cursor.hot.y = ops->cursor_state.hot.y;
 355        cursor.mask = ops->cursor_state.mask;
 356        cursor.enable = ops->cursor_state.enable;
 357        cursor.image.depth = 1;
 358        cursor.rop = ROP_XOR;
 359
 360        if (info->fbops->fb_cursor)
 361                err = info->fbops->fb_cursor(info, &cursor);
 362
 363        if (err)
 364                soft_cursor(info, &cursor);
 365
 366        ops->cursor_reset = 0;
 367}
 368
 369static int cw_update_start(struct fb_info *info)
 370{
 371        struct fbcon_ops *ops = info->fbcon_par;
 372        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 373        u32 xoffset;
 374        int err;
 375
 376        xoffset = vxres - (info->var.xres + ops->var.yoffset);
 377        ops->var.yoffset = ops->var.xoffset;
 378        ops->var.xoffset = xoffset;
 379        err = fb_pan_display(info, &ops->var);
 380        ops->var.xoffset = info->var.xoffset;
 381        ops->var.yoffset = info->var.yoffset;
 382        ops->var.vmode = info->var.vmode;
 383        return err;
 384}
 385
 386void fbcon_rotate_cw(struct fbcon_ops *ops)
 387{
 388        ops->bmove = cw_bmove;
 389        ops->clear = cw_clear;
 390        ops->putcs = cw_putcs;
 391        ops->clear_margins = cw_clear_margins;
 392        ops->cursor = cw_cursor;
 393        ops->update_start = cw_update_start;
 394}
 395EXPORT_SYMBOL(fbcon_rotate_cw);
 396