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 = font_glyph_pitch(vc->vc_font.width); 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 48 static void ud_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_par *par = info->fbcon_par; 52 struct fb_copyarea area; 53 u32 vyres = GETVYRES(par->p, info); 54 u32 vxres = GETVXRES(par->p, info); 55 56 area.sy = vyres - ((sy + height) * vc->vc_font.height); 57 area.sx = vxres - ((sx + width) * vc->vc_font.width); 58 area.dy = vyres - ((dy + height) * vc->vc_font.height); 59 area.dx = vxres - ((dx + width) * vc->vc_font.width); 60 area.height = height * vc->vc_font.height; 61 area.width = width * vc->vc_font.width; 62 63 info->fbops->fb_copyarea(info, &area); 64 } 65 66 static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy, 67 int sx, int height, int width, int fg, int bg) 68 { 69 struct fbcon_par *par = info->fbcon_par; 70 struct fb_fillrect region; 71 u32 vyres = GETVYRES(par->p, info); 72 u32 vxres = GETVXRES(par->p, info); 73 74 region.color = bg; 75 region.dy = vyres - ((sy + height) * vc->vc_font.height); 76 region.dx = vxres - ((sx + width) * vc->vc_font.width); 77 region.width = width * vc->vc_font.width; 78 region.height = height * vc->vc_font.height; 79 region.rop = ROP_COPY; 80 81 info->fbops->fb_fillrect(info, ®ion); 82 } 83 84 static inline void ud_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_par *par = info->fbcon_par; 90 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 91 u32 idx = vc->vc_font.width >> 3; 92 u8 *src; 93 94 while (cnt--) { 95 src = par->rotated.buf + (scr_readw(s--) & charmask) * cellsize; 96 97 if (attr) { 98 ud_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 image->height); 105 else 106 fb_pad_aligned_buffer(dst, d_pitch, src, idx, 107 image->height); 108 109 dst += s_pitch; 110 } 111 112 info->fbops->fb_imageblit(info, image); 113 } 114 115 static inline void ud_putcs_unaligned(struct vc_data *vc, 116 struct fb_info *info, const u16 *s, 117 u32 attr, u32 cnt, u32 d_pitch, 118 u32 s_pitch, u32 cellsize, 119 struct fb_image *image, u8 *buf, 120 u8 *dst) 121 { 122 struct fbcon_par *par = info->fbcon_par; 123 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 124 u32 shift_low = 0, mod = vc->vc_font.width % 8; 125 u32 shift_high = 8; 126 u32 idx = vc->vc_font.width >> 3; 127 u8 *src; 128 129 while (cnt--) { 130 src = par->rotated.buf + (scr_readw(s--) & charmask) * cellsize; 131 132 if (attr) { 133 ud_update_attr(buf, src, attr, vc); 134 src = buf; 135 } 136 137 fb_pad_unaligned_buffer(dst, d_pitch, src, idx, 138 image->height, shift_high, 139 shift_low, mod); 140 shift_low += mod; 141 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1; 142 shift_low &= 7; 143 shift_high = 8 - shift_low; 144 } 145 146 info->fbops->fb_imageblit(info, image); 147 148 } 149 150 static void ud_putcs(struct vc_data *vc, struct fb_info *info, 151 const unsigned short *s, int count, int yy, int xx, 152 int fg, int bg) 153 { 154 struct fb_image image; 155 struct fbcon_par *par = info->fbcon_par; 156 u32 width = font_glyph_pitch(vc->vc_font.width); 157 u32 cellsize = width * vc->vc_font.height; 158 u32 maxcnt = info->pixmap.size/cellsize; 159 u32 scan_align = info->pixmap.scan_align - 1; 160 u32 buf_align = info->pixmap.buf_align - 1; 161 u32 mod = vc->vc_font.width % 8, cnt, pitch, size; 162 u32 attribute = get_attribute(info, scr_readw(s)); 163 u8 *dst, *buf = NULL; 164 u32 vyres = GETVYRES(par->p, info); 165 u32 vxres = GETVXRES(par->p, info); 166 167 if (!par->rotated.buf) 168 return; 169 170 image.fg_color = fg; 171 image.bg_color = bg; 172 image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height); 173 image.dx = vxres - ((xx + count) * vc->vc_font.width); 174 image.height = vc->vc_font.height; 175 image.depth = 1; 176 177 if (attribute) { 178 buf = kmalloc(cellsize, GFP_KERNEL); 179 if (!buf) 180 return; 181 } 182 183 s += count - 1; 184 185 while (count) { 186 if (count > maxcnt) 187 cnt = maxcnt; 188 else 189 cnt = count; 190 191 image.width = vc->vc_font.width * cnt; 192 pitch = ((image.width + 7) >> 3) + scan_align; 193 pitch &= ~scan_align; 194 size = pitch * image.height + buf_align; 195 size &= ~buf_align; 196 dst = fb_get_buffer_offset(info, &info->pixmap, size); 197 image.data = dst; 198 199 if (!mod) 200 ud_putcs_aligned(vc, info, s, attribute, cnt, pitch, 201 width, cellsize, &image, buf, dst); 202 else 203 ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch, 204 width, cellsize, &image, 205 buf, dst); 206 207 image.dx += image.width; 208 count -= cnt; 209 s -= cnt; 210 xx += cnt; 211 } 212 213 /* buf is always NULL except when in monochrome mode, so in this case 214 it's a gain to check buf against NULL even though kfree() handles 215 NULL pointers just fine */ 216 if (unlikely(buf)) 217 kfree(buf); 218 219 } 220 221 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info, 222 int color, int bottom_only) 223 { 224 unsigned int cw = vc->vc_font.width; 225 unsigned int ch = vc->vc_font.height; 226 unsigned int rw = info->var.xres - (vc->vc_cols*cw); 227 unsigned int bh = info->var.yres - (vc->vc_rows*ch); 228 struct fb_fillrect region; 229 230 region.color = color; 231 region.rop = ROP_COPY; 232 233 if ((int) rw > 0 && !bottom_only) { 234 region.dy = 0; 235 region.dx = info->var.xoffset; 236 region.width = rw; 237 region.height = info->var.yres_virtual; 238 info->fbops->fb_fillrect(info, ®ion); 239 } 240 241 if ((int) bh > 0) { 242 region.dy = info->var.yoffset; 243 region.dx = info->var.xoffset; 244 region.height = bh; 245 region.width = info->var.xres; 246 info->fbops->fb_fillrect(info, ®ion); 247 } 248 } 249 250 static void ud_cursor(struct vc_data *vc, struct fb_info *info, bool enable, 251 int fg, int bg) 252 { 253 struct fb_cursor cursor; 254 struct fbcon_par *par = info->fbcon_par; 255 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 256 int w = font_glyph_pitch(vc->vc_font.width); 257 int c; 258 int y = real_y(par->p, vc->state.y); 259 int attribute, use_sw = vc->vc_cursor_type & CUR_SW; 260 int err = 1, dx, dy; 261 char *src; 262 u32 vyres = GETVYRES(par->p, info); 263 u32 vxres = GETVXRES(par->p, info); 264 265 if (!par->rotated.buf) 266 return; 267 268 cursor.set = 0; 269 270 c = scr_readw((u16 *) vc->vc_pos); 271 attribute = get_attribute(info, c); 272 src = par->rotated.buf + ((c & charmask) * (w * vc->vc_font.height)); 273 274 if (par->cursor_state.image.data != src || 275 par->cursor_reset) { 276 par->cursor_state.image.data = src; 277 cursor.set |= FB_CUR_SETIMAGE; 278 } 279 280 if (attribute) { 281 u8 *dst; 282 283 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 284 if (!dst) 285 return; 286 kfree(par->cursor_data); 287 par->cursor_data = dst; 288 ud_update_attr(dst, src, attribute, vc); 289 src = dst; 290 } 291 292 if (par->cursor_state.image.fg_color != fg || 293 par->cursor_state.image.bg_color != bg || 294 par->cursor_reset) { 295 par->cursor_state.image.fg_color = fg; 296 par->cursor_state.image.bg_color = bg; 297 cursor.set |= FB_CUR_SETCMAP; 298 } 299 300 if (par->cursor_state.image.height != vc->vc_font.height || 301 par->cursor_state.image.width != vc->vc_font.width || 302 par->cursor_reset) { 303 par->cursor_state.image.height = vc->vc_font.height; 304 par->cursor_state.image.width = vc->vc_font.width; 305 cursor.set |= FB_CUR_SETSIZE; 306 } 307 308 dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height); 309 dx = vxres - ((vc->state.x * vc->vc_font.width) + vc->vc_font.width); 310 311 if (par->cursor_state.image.dx != dx || 312 par->cursor_state.image.dy != dy || 313 par->cursor_reset) { 314 par->cursor_state.image.dx = dx; 315 par->cursor_state.image.dy = dy; 316 cursor.set |= FB_CUR_SETPOS; 317 } 318 319 if (par->cursor_state.hot.x || par->cursor_state.hot.y || 320 par->cursor_reset) { 321 par->cursor_state.hot.x = cursor.hot.y = 0; 322 cursor.set |= FB_CUR_SETHOT; 323 } 324 325 if (cursor.set & FB_CUR_SETSIZE || 326 vc->vc_cursor_type != par->p->cursor_shape || 327 par->cursor_state.mask == NULL || 328 par->cursor_reset) { 329 unsigned char *tmp, *mask; 330 331 tmp = kmalloc_array(vc->vc_font.height, w, GFP_ATOMIC); 332 if (!tmp) 333 return; 334 fbcon_fill_cursor_mask(par, vc, tmp); 335 336 mask = kmalloc_array(vc->vc_font.height, w, GFP_ATOMIC); 337 if (!mask) { 338 kfree(tmp); 339 return; 340 } 341 font_glyph_rotate_180(tmp, vc->vc_font.width, vc->vc_font.height, mask); 342 kfree(tmp); 343 344 kfree(par->cursor_state.mask); 345 par->cursor_state.mask = (const char *)mask; 346 347 par->p->cursor_shape = vc->vc_cursor_type; 348 cursor.set |= FB_CUR_SETSHAPE; 349 } 350 351 par->cursor_state.enable = enable && !use_sw; 352 353 cursor.image.data = src; 354 cursor.image.fg_color = par->cursor_state.image.fg_color; 355 cursor.image.bg_color = par->cursor_state.image.bg_color; 356 cursor.image.dx = par->cursor_state.image.dx; 357 cursor.image.dy = par->cursor_state.image.dy; 358 cursor.image.height = par->cursor_state.image.height; 359 cursor.image.width = par->cursor_state.image.width; 360 cursor.hot.x = par->cursor_state.hot.x; 361 cursor.hot.y = par->cursor_state.hot.y; 362 cursor.mask = par->cursor_state.mask; 363 cursor.enable = par->cursor_state.enable; 364 cursor.image.depth = 1; 365 cursor.rop = ROP_XOR; 366 367 if (info->fbops->fb_cursor) 368 err = info->fbops->fb_cursor(info, &cursor); 369 370 if (err) 371 soft_cursor(info, &cursor); 372 373 par->cursor_reset = 0; 374 } 375 376 static int ud_update_start(struct fb_info *info) 377 { 378 struct fbcon_par *par = info->fbcon_par; 379 int xoffset, yoffset; 380 u32 vyres = GETVYRES(par->p, info); 381 u32 vxres = GETVXRES(par->p, info); 382 int err; 383 384 xoffset = vxres - info->var.xres - par->var.xoffset; 385 yoffset = vyres - info->var.yres - par->var.yoffset; 386 if (yoffset < 0) 387 yoffset += vyres; 388 par->var.xoffset = xoffset; 389 par->var.yoffset = yoffset; 390 err = fb_pan_display(info, &par->var); 391 par->var.xoffset = info->var.xoffset; 392 par->var.yoffset = info->var.yoffset; 393 par->var.vmode = info->var.vmode; 394 return err; 395 } 396 397 static const struct fbcon_bitops ud_fbcon_bitops = { 398 .bmove = ud_bmove, 399 .clear = ud_clear, 400 .putcs = ud_putcs, 401 .clear_margins = ud_clear_margins, 402 .cursor = ud_cursor, 403 .update_start = ud_update_start, 404 .rotate_font = fbcon_rotate_font, 405 }; 406 407 void fbcon_set_bitops_ud(struct fbcon_par *par) 408 { 409 par->bitops = &ud_fbcon_bitops; 410 } 411