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