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fbcon_ud.c
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linux-6.19.14/drivers/video/fbdev/core/fbcon_ud.c
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 25static 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 48static 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 66static 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 84static 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->fontbuffer + (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 115static 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->fontbuffer + (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 150static 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 = (vc->vc_font.width + 7)/8; 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->fontbuffer) 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 221static 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 250static 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 = (vc->vc_font.width + 7) >> 3, c; 257 int y = real_y(par->p, vc->state.y); 258 int attribute, use_sw = vc->vc_cursor_type & CUR_SW; 259 int err = 1, dx, dy; 260 char *src; 261 u32 vyres = GETVYRES(par->p, info); 262 u32 vxres = GETVXRES(par->p, info); 263 264 if (!par->fontbuffer) 265 return; 266 267 cursor.set = 0; 268 269 c = scr_readw((u16 *) vc->vc_pos); 270 attribute = get_attribute(info, c); 271 src = par->fontbuffer + ((c & charmask) * (w * vc->vc_font.height)); 272 273 if (par->cursor_state.image.data != src || 274 par->cursor_reset) { 275 par->cursor_state.image.data = src; 276 cursor.set |= FB_CUR_SETIMAGE; 277 } 278 279 if (attribute) { 280 u8 *dst; 281 282 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 283 if (!dst) 284 return; 285 kfree(par->cursor_data); 286 par->cursor_data = dst; 287 ud_update_attr(dst, src, attribute, vc); 288 src = dst; 289 } 290 291 if (par->cursor_state.image.fg_color != fg || 292 par->cursor_state.image.bg_color != bg || 293 par->cursor_reset) { 294 par->cursor_state.image.fg_color = fg; 295 par->cursor_state.image.bg_color = bg; 296 cursor.set |= FB_CUR_SETCMAP; 297 } 298 299 if (par->cursor_state.image.height != vc->vc_font.height || 300 par->cursor_state.image.width != vc->vc_font.width || 301 par->cursor_reset) { 302 par->cursor_state.image.height = vc->vc_font.height; 303 par->cursor_state.image.width = vc->vc_font.width; 304 cursor.set |= FB_CUR_SETSIZE; 305 } 306 307 dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height); 308 dx = vxres - ((vc->state.x * vc->vc_font.width) + vc->vc_font.width); 309 310 if (par->cursor_state.image.dx != dx || 311 par->cursor_state.image.dy != dy || 312 par->cursor_reset) { 313 par->cursor_state.image.dx = dx; 314 par->cursor_state.image.dy = dy; 315 cursor.set |= FB_CUR_SETPOS; 316 } 317 318 if (par->cursor_state.hot.x || par->cursor_state.hot.y || 319 par->cursor_reset) { 320 par->cursor_state.hot.x = cursor.hot.y = 0; 321 cursor.set |= FB_CUR_SETHOT; 322 } 323 324 if (cursor.set & FB_CUR_SETSIZE || 325 vc->vc_cursor_type != par->p->cursor_shape || 326 par->cursor_state.mask == NULL || 327 par->cursor_reset) { 328 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC); 329 int cur_height, size, i = 0; 330 u8 msk = 0xff; 331 332 if (!mask) 333 return; 334 335 kfree(par->cursor_state.mask); 336 par->cursor_state.mask = mask; 337 338 par->p->cursor_shape = vc->vc_cursor_type; 339 cursor.set |= FB_CUR_SETSHAPE; 340 341 switch (CUR_SIZE(par->p->cursor_shape)) { 342 case CUR_NONE: 343 cur_height = 0; 344 break; 345 case CUR_UNDERLINE: 346 cur_height = (vc->vc_font.height < 10) ? 1 : 2; 347 break; 348 case CUR_LOWER_THIRD: 349 cur_height = vc->vc_font.height/3; 350 break; 351 case CUR_LOWER_HALF: 352 cur_height = vc->vc_font.height >> 1; 353 break; 354 case CUR_TWO_THIRDS: 355 cur_height = (vc->vc_font.height << 1)/3; 356 break; 357 case CUR_BLOCK: 358 default: 359 cur_height = vc->vc_font.height; 360 break; 361 } 362 363 size = cur_height * w; 364 365 while (size--) 366 mask[i++] = msk; 367 368 size = (vc->vc_font.height - cur_height) * w; 369 370 while (size--) 371 mask[i++] = ~msk; 372 } 373 374 par->cursor_state.enable = enable && !use_sw; 375 376 cursor.image.data = src; 377 cursor.image.fg_color = par->cursor_state.image.fg_color; 378 cursor.image.bg_color = par->cursor_state.image.bg_color; 379 cursor.image.dx = par->cursor_state.image.dx; 380 cursor.image.dy = par->cursor_state.image.dy; 381 cursor.image.height = par->cursor_state.image.height; 382 cursor.image.width = par->cursor_state.image.width; 383 cursor.hot.x = par->cursor_state.hot.x; 384 cursor.hot.y = par->cursor_state.hot.y; 385 cursor.mask = par->cursor_state.mask; 386 cursor.enable = par->cursor_state.enable; 387 cursor.image.depth = 1; 388 cursor.rop = ROP_XOR; 389 390 if (info->fbops->fb_cursor) 391 err = info->fbops->fb_cursor(info, &cursor); 392 393 if (err) 394 soft_cursor(info, &cursor); 395 396 par->cursor_reset = 0; 397} 398 399static int ud_update_start(struct fb_info *info) 400{ 401 struct fbcon_par *par = info->fbcon_par; 402 int xoffset, yoffset; 403 u32 vyres = GETVYRES(par->p, info); 404 u32 vxres = GETVXRES(par->p, info); 405 int err; 406 407 xoffset = vxres - info->var.xres - par->var.xoffset; 408 yoffset = vyres - info->var.yres - par->var.yoffset; 409 if (yoffset < 0) 410 yoffset += vyres; 411 par->var.xoffset = xoffset; 412 par->var.yoffset = yoffset; 413 err = fb_pan_display(info, &par->var); 414 par->var.xoffset = info->var.xoffset; 415 par->var.yoffset = info->var.yoffset; 416 par->var.vmode = info->var.vmode; 417 return err; 418} 419 420static const struct fbcon_bitops ud_fbcon_bitops = { 421 .bmove = ud_bmove, 422 .clear = ud_clear, 423 .putcs = ud_putcs, 424 .clear_margins = ud_clear_margins, 425 .cursor = ud_cursor, 426 .update_start = ud_update_start, 427 .rotate_font = fbcon_rotate_font, 428}; 429 430void fbcon_set_bitops_ud(struct fbcon_par *par) 431{ 432 par->bitops = &ud_fbcon_bitops; 433}
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