1 /* 2 * linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 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 270 degrees 23 */ 24 25 static void ccw_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 int mod = vc->vc_font.height % 8; 31 u8 c, msk = ~(0xff << offset), msk1 = 0; 32 33 if (mod) 34 msk <<= (8 - mod); 35 36 if (offset > mod) 37 msk1 |= 0x01; 38 39 for (i = 0; i < vc->vc_font.width; i++) { 40 for (j = 0; j < width; j++) { 41 c = *src; 42 43 if (attribute & FBCON_ATTRIBUTE_UNDERLINE) { 44 if (j == width - 1) 45 c |= msk; 46 47 if (msk1 && j == width - 2) 48 c |= msk1; 49 } 50 51 if (attribute & FBCON_ATTRIBUTE_BOLD && i) 52 *(dst - width) |= c; 53 54 if (attribute & FBCON_ATTRIBUTE_REVERSE) 55 c = ~c; 56 src++; 57 *dst++ = c; 58 } 59 } 60 } 61 62 63 static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy, 64 int sx, int dy, int dx, int height, int width) 65 { 66 struct fbcon_ops *ops = info->fbcon_par; 67 struct fb_copyarea area; 68 u32 vyres = GETVYRES(ops->p, info); 69 70 area.sx = sy * vc->vc_font.height; 71 area.sy = vyres - ((sx + width) * vc->vc_font.width); 72 area.dx = dy * vc->vc_font.height; 73 area.dy = vyres - ((dx + width) * vc->vc_font.width); 74 area.width = height * vc->vc_font.height; 75 area.height = width * vc->vc_font.width; 76 77 info->fbops->fb_copyarea(info, &area); 78 } 79 80 static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy, 81 int sx, int height, int width, int fg, int bg) 82 { 83 struct fbcon_ops *ops = info->fbcon_par; 84 struct fb_fillrect region; 85 u32 vyres = GETVYRES(ops->p, info); 86 87 region.color = bg; 88 region.dx = sy * vc->vc_font.height; 89 region.dy = vyres - ((sx + width) * vc->vc_font.width); 90 region.height = width * vc->vc_font.width; 91 region.width = height * vc->vc_font.height; 92 region.rop = ROP_COPY; 93 94 info->fbops->fb_fillrect(info, ®ion); 95 } 96 97 static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info, 98 const u16 *s, u32 attr, u32 cnt, 99 u32 d_pitch, u32 s_pitch, u32 cellsize, 100 struct fb_image *image, u8 *buf, u8 *dst) 101 { 102 struct fbcon_ops *ops = info->fbcon_par; 103 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 104 u32 idx = (vc->vc_font.height + 7) >> 3; 105 u8 *src; 106 107 while (cnt--) { 108 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize; 109 110 if (attr) { 111 ccw_update_attr(buf, src, attr, vc); 112 src = buf; 113 } 114 115 if (likely(idx == 1)) 116 __fb_pad_aligned_buffer(dst, d_pitch, src, idx, 117 vc->vc_font.width); 118 else 119 fb_pad_aligned_buffer(dst, d_pitch, src, idx, 120 vc->vc_font.width); 121 122 dst += d_pitch * vc->vc_font.width; 123 } 124 125 info->fbops->fb_imageblit(info, image); 126 } 127 128 static void ccw_putcs(struct vc_data *vc, struct fb_info *info, 129 const unsigned short *s, int count, int yy, int xx, 130 int fg, int bg) 131 { 132 struct fb_image image; 133 struct fbcon_ops *ops = info->fbcon_par; 134 u32 width = (vc->vc_font.height + 7)/8; 135 u32 cellsize = width * vc->vc_font.width; 136 u32 maxcnt = info->pixmap.size/cellsize; 137 u32 scan_align = info->pixmap.scan_align - 1; 138 u32 buf_align = info->pixmap.buf_align - 1; 139 u32 cnt, pitch, size; 140 u32 attribute = get_attribute(info, scr_readw(s)); 141 u8 *dst, *buf = NULL; 142 u32 vyres = GETVYRES(ops->p, info); 143 144 if (!ops->fontbuffer) 145 return; 146 147 image.fg_color = fg; 148 image.bg_color = bg; 149 image.dx = yy * vc->vc_font.height; 150 image.dy = vyres - ((xx + count) * vc->vc_font.width); 151 image.width = vc->vc_font.height; 152 image.depth = 1; 153 154 if (attribute) { 155 buf = kmalloc(cellsize, GFP_KERNEL); 156 if (!buf) 157 return; 158 } 159 160 s += count - 1; 161 162 while (count) { 163 if (count > maxcnt) 164 cnt = maxcnt; 165 else 166 cnt = count; 167 168 image.height = vc->vc_font.width * cnt; 169 pitch = ((image.width + 7) >> 3) + scan_align; 170 pitch &= ~scan_align; 171 size = pitch * image.height + buf_align; 172 size &= ~buf_align; 173 dst = fb_get_buffer_offset(info, &info->pixmap, size); 174 image.data = dst; 175 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch, 176 width, cellsize, &image, buf, dst); 177 image.dy += image.height; 178 count -= cnt; 179 s -= cnt; 180 } 181 182 /* buf is always NULL except when in monochrome mode, so in this case 183 it's a gain to check buf against NULL even though kfree() handles 184 NULL pointers just fine */ 185 if (unlikely(buf)) 186 kfree(buf); 187 188 } 189 190 static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info, 191 int color, int bottom_only) 192 { 193 unsigned int cw = vc->vc_font.width; 194 unsigned int ch = vc->vc_font.height; 195 unsigned int rw = info->var.yres - (vc->vc_cols*cw); 196 unsigned int bh = info->var.xres - (vc->vc_rows*ch); 197 unsigned int bs = vc->vc_rows*ch; 198 struct fb_fillrect region; 199 200 region.color = color; 201 region.rop = ROP_COPY; 202 203 if ((int) rw > 0 && !bottom_only) { 204 region.dx = 0; 205 region.dy = info->var.yoffset; 206 region.height = rw; 207 region.width = info->var.xres_virtual; 208 info->fbops->fb_fillrect(info, ®ion); 209 } 210 211 if ((int) bh > 0) { 212 region.dx = info->var.xoffset + bs; 213 region.dy = 0; 214 region.height = info->var.yres_virtual; 215 region.width = bh; 216 info->fbops->fb_fillrect(info, ®ion); 217 } 218 } 219 220 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, bool enable, 221 int fg, int bg) 222 { 223 struct fb_cursor cursor; 224 struct fbcon_ops *ops = info->fbcon_par; 225 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 226 int w = (vc->vc_font.height + 7) >> 3, c; 227 int y = real_y(ops->p, vc->state.y); 228 int attribute, use_sw = vc->vc_cursor_type & CUR_SW; 229 int err = 1, dx, dy; 230 char *src; 231 u32 vyres = GETVYRES(ops->p, info); 232 233 if (!ops->fontbuffer) 234 return; 235 236 cursor.set = 0; 237 238 c = scr_readw((u16 *) vc->vc_pos); 239 attribute = get_attribute(info, c); 240 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width)); 241 242 if (ops->cursor_state.image.data != src || 243 ops->cursor_reset) { 244 ops->cursor_state.image.data = src; 245 cursor.set |= FB_CUR_SETIMAGE; 246 } 247 248 if (attribute) { 249 u8 *dst; 250 251 dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC); 252 if (!dst) 253 return; 254 kfree(ops->cursor_data); 255 ops->cursor_data = dst; 256 ccw_update_attr(dst, src, attribute, vc); 257 src = dst; 258 } 259 260 if (ops->cursor_state.image.fg_color != fg || 261 ops->cursor_state.image.bg_color != bg || 262 ops->cursor_reset) { 263 ops->cursor_state.image.fg_color = fg; 264 ops->cursor_state.image.bg_color = bg; 265 cursor.set |= FB_CUR_SETCMAP; 266 } 267 268 if (ops->cursor_state.image.height != vc->vc_font.width || 269 ops->cursor_state.image.width != vc->vc_font.height || 270 ops->cursor_reset) { 271 ops->cursor_state.image.height = vc->vc_font.width; 272 ops->cursor_state.image.width = vc->vc_font.height; 273 cursor.set |= FB_CUR_SETSIZE; 274 } 275 276 dx = y * vc->vc_font.height; 277 dy = vyres - ((vc->state.x + 1) * vc->vc_font.width); 278 279 if (ops->cursor_state.image.dx != dx || 280 ops->cursor_state.image.dy != dy || 281 ops->cursor_reset) { 282 ops->cursor_state.image.dx = dx; 283 ops->cursor_state.image.dy = dy; 284 cursor.set |= FB_CUR_SETPOS; 285 } 286 287 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y || 288 ops->cursor_reset) { 289 ops->cursor_state.hot.x = cursor.hot.y = 0; 290 cursor.set |= FB_CUR_SETHOT; 291 } 292 293 if (cursor.set & FB_CUR_SETSIZE || 294 vc->vc_cursor_type != ops->p->cursor_shape || 295 ops->cursor_state.mask == NULL || 296 ops->cursor_reset) { 297 char *tmp, *mask = kmalloc_array(w, vc->vc_font.width, 298 GFP_ATOMIC); 299 int cur_height, size, i = 0; 300 int width = (vc->vc_font.width + 7)/8; 301 302 if (!mask) 303 return; 304 305 tmp = kmalloc_array(width, vc->vc_font.height, GFP_ATOMIC); 306 307 if (!tmp) { 308 kfree(mask); 309 return; 310 } 311 312 kfree(ops->cursor_state.mask); 313 ops->cursor_state.mask = mask; 314 315 ops->p->cursor_shape = vc->vc_cursor_type; 316 cursor.set |= FB_CUR_SETSHAPE; 317 318 switch (CUR_SIZE(ops->p->cursor_shape)) { 319 case CUR_NONE: 320 cur_height = 0; 321 break; 322 case CUR_UNDERLINE: 323 cur_height = (vc->vc_font.height < 10) ? 1 : 2; 324 break; 325 case CUR_LOWER_THIRD: 326 cur_height = vc->vc_font.height/3; 327 break; 328 case CUR_LOWER_HALF: 329 cur_height = vc->vc_font.height >> 1; 330 break; 331 case CUR_TWO_THIRDS: 332 cur_height = (vc->vc_font.height << 1)/3; 333 break; 334 case CUR_BLOCK: 335 default: 336 cur_height = vc->vc_font.height; 337 break; 338 } 339 340 size = (vc->vc_font.height - cur_height) * width; 341 while (size--) 342 tmp[i++] = 0; 343 size = cur_height * width; 344 while (size--) 345 tmp[i++] = 0xff; 346 memset(mask, 0, w * vc->vc_font.width); 347 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height); 348 kfree(tmp); 349 } 350 351 ops->cursor_state.enable = enable && !use_sw; 352 353 cursor.image.data = src; 354 cursor.image.fg_color = ops->cursor_state.image.fg_color; 355 cursor.image.bg_color = ops->cursor_state.image.bg_color; 356 cursor.image.dx = ops->cursor_state.image.dx; 357 cursor.image.dy = ops->cursor_state.image.dy; 358 cursor.image.height = ops->cursor_state.image.height; 359 cursor.image.width = ops->cursor_state.image.width; 360 cursor.hot.x = ops->cursor_state.hot.x; 361 cursor.hot.y = ops->cursor_state.hot.y; 362 cursor.mask = ops->cursor_state.mask; 363 cursor.enable = ops->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 ops->cursor_reset = 0; 374 } 375 376 static int ccw_update_start(struct fb_info *info) 377 { 378 struct fbcon_ops *ops = info->fbcon_par; 379 u32 yoffset; 380 u32 vyres = GETVYRES(ops->p, info); 381 int err; 382 383 yoffset = (vyres - info->var.yres) - ops->var.xoffset; 384 ops->var.xoffset = ops->var.yoffset; 385 ops->var.yoffset = yoffset; 386 err = fb_pan_display(info, &ops->var); 387 ops->var.xoffset = info->var.xoffset; 388 ops->var.yoffset = info->var.yoffset; 389 ops->var.vmode = info->var.vmode; 390 return err; 391 } 392 393 void fbcon_rotate_ccw(struct fbcon_ops *ops) 394 { 395 ops->bmove = ccw_bmove; 396 ops->clear = ccw_clear; 397 ops->putcs = ccw_putcs; 398 ops->clear_margins = ccw_clear_margins; 399 ops->cursor = ccw_cursor; 400 ops->update_start = ccw_update_start; 401 } 402