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
ud_update_attr(u8 * dst,u8 * src,int attribute,struct vc_data * vc)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
ud_bmove(struct vc_data * vc,struct fb_info * info,int sy,int sx,int dy,int dx,int height,int width)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_ops *ops = info->fbcon_par;
52 struct fb_copyarea area;
53 u32 vyres = GETVYRES(ops->p, info);
54 u32 vxres = GETVXRES(ops->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
ud_clear(struct vc_data * vc,struct fb_info * info,int sy,int sx,int height,int width)66 static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
67 int sx, int height, int width)
68 {
69 struct fbcon_ops *ops = info->fbcon_par;
70 struct fb_fillrect region;
71 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
72 u32 vyres = GETVYRES(ops->p, info);
73 u32 vxres = GETVXRES(ops->p, info);
74
75 region.color = attr_bgcol_ec(bgshift,vc,info);
76 region.dy = vyres - ((sy + height) * vc->vc_font.height);
77 region.dx = vxres - ((sx + width) * vc->vc_font.width);
78 region.width = width * vc->vc_font.width;
79 region.height = height * vc->vc_font.height;
80 region.rop = ROP_COPY;
81
82 info->fbops->fb_fillrect(info, ®ion);
83 }
84
ud_putcs_aligned(struct vc_data * vc,struct fb_info * info,const u16 * s,u32 attr,u32 cnt,u32 d_pitch,u32 s_pitch,u32 cellsize,struct fb_image * image,u8 * buf,u8 * dst)85 static inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,
86 const u16 *s, u32 attr, u32 cnt,
87 u32 d_pitch, u32 s_pitch, u32 cellsize,
88 struct fb_image *image, u8 *buf, u8 *dst)
89 {
90 struct fbcon_ops *ops = info->fbcon_par;
91 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
92 u32 idx = vc->vc_font.width >> 3;
93 u8 *src;
94
95 while (cnt--) {
96 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
97
98 if (attr) {
99 ud_update_attr(buf, src, attr, vc);
100 src = buf;
101 }
102
103 if (likely(idx == 1))
104 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
105 image->height);
106 else
107 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
108 image->height);
109
110 dst += s_pitch;
111 }
112
113 info->fbops->fb_imageblit(info, image);
114 }
115
ud_putcs_unaligned(struct vc_data * vc,struct fb_info * info,const u16 * s,u32 attr,u32 cnt,u32 d_pitch,u32 s_pitch,u32 cellsize,struct fb_image * image,u8 * buf,u8 * dst)116 static inline void ud_putcs_unaligned(struct vc_data *vc,
117 struct fb_info *info, const u16 *s,
118 u32 attr, u32 cnt, u32 d_pitch,
119 u32 s_pitch, u32 cellsize,
120 struct fb_image *image, u8 *buf,
121 u8 *dst)
122 {
123 struct fbcon_ops *ops = info->fbcon_par;
124 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
125 u32 shift_low = 0, mod = vc->vc_font.width % 8;
126 u32 shift_high = 8;
127 u32 idx = vc->vc_font.width >> 3;
128 u8 *src;
129
130 while (cnt--) {
131 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
132
133 if (attr) {
134 ud_update_attr(buf, src, attr, vc);
135 src = buf;
136 }
137
138 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
139 image->height, shift_high,
140 shift_low, mod);
141 shift_low += mod;
142 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
143 shift_low &= 7;
144 shift_high = 8 - shift_low;
145 }
146
147 info->fbops->fb_imageblit(info, image);
148
149 }
150
ud_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)151 static void ud_putcs(struct vc_data *vc, struct fb_info *info,
152 const unsigned short *s, int count, int yy, int xx,
153 int fg, int bg)
154 {
155 struct fb_image image;
156 struct fbcon_ops *ops = info->fbcon_par;
157 u32 width = (vc->vc_font.width + 7)/8;
158 u32 cellsize = width * vc->vc_font.height;
159 u32 maxcnt = info->pixmap.size/cellsize;
160 u32 scan_align = info->pixmap.scan_align - 1;
161 u32 buf_align = info->pixmap.buf_align - 1;
162 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
163 u32 attribute = get_attribute(info, scr_readw(s));
164 u8 *dst, *buf = NULL;
165 u32 vyres = GETVYRES(ops->p, info);
166 u32 vxres = GETVXRES(ops->p, info);
167
168 if (!ops->fontbuffer)
169 return;
170
171 image.fg_color = fg;
172 image.bg_color = bg;
173 image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
174 image.dx = vxres - ((xx + count) * vc->vc_font.width);
175 image.height = vc->vc_font.height;
176 image.depth = 1;
177
178 if (attribute) {
179 buf = kmalloc(cellsize, GFP_KERNEL);
180 if (!buf)
181 return;
182 }
183
184 s += count - 1;
185
186 while (count) {
187 if (count > maxcnt)
188 cnt = maxcnt;
189 else
190 cnt = count;
191
192 image.width = vc->vc_font.width * cnt;
193 pitch = ((image.width + 7) >> 3) + scan_align;
194 pitch &= ~scan_align;
195 size = pitch * image.height + buf_align;
196 size &= ~buf_align;
197 dst = fb_get_buffer_offset(info, &info->pixmap, size);
198 image.data = dst;
199
200 if (!mod)
201 ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
202 width, cellsize, &image, buf, dst);
203 else
204 ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
205 width, cellsize, &image,
206 buf, dst);
207
208 image.dx += image.width;
209 count -= cnt;
210 s -= cnt;
211 xx += cnt;
212 }
213
214 /* buf is always NULL except when in monochrome mode, so in this case
215 it's a gain to check buf against NULL even though kfree() handles
216 NULL pointers just fine */
217 if (unlikely(buf))
218 kfree(buf);
219
220 }
221
ud_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)222 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
223 int color, int bottom_only)
224 {
225 unsigned int cw = vc->vc_font.width;
226 unsigned int ch = vc->vc_font.height;
227 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
228 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
229 struct fb_fillrect region;
230
231 region.color = color;
232 region.rop = ROP_COPY;
233
234 if ((int) rw > 0 && !bottom_only) {
235 region.dy = 0;
236 region.dx = info->var.xoffset;
237 region.width = rw;
238 region.height = info->var.yres_virtual;
239 info->fbops->fb_fillrect(info, ®ion);
240 }
241
242 if ((int) bh > 0) {
243 region.dy = info->var.yoffset;
244 region.dx = info->var.xoffset;
245 region.height = bh;
246 region.width = info->var.xres;
247 info->fbops->fb_fillrect(info, ®ion);
248 }
249 }
250
ud_cursor(struct vc_data * vc,struct fb_info * info,int mode,int fg,int bg)251 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
252 int fg, int bg)
253 {
254 struct fb_cursor cursor;
255 struct fbcon_ops *ops = info->fbcon_par;
256 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
257 int w = (vc->vc_font.width + 7) >> 3, c;
258 int y = real_y(ops->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(ops->p, info);
263 u32 vxres = GETVXRES(ops->p, info);
264
265 if (!ops->fontbuffer)
266 return;
267
268 cursor.set = 0;
269
270 c = scr_readw((u16 *) vc->vc_pos);
271 attribute = get_attribute(info, c);
272 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
273
274 if (ops->cursor_state.image.data != src ||
275 ops->cursor_reset) {
276 ops->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(ops->cursor_data);
287 ops->cursor_data = dst;
288 ud_update_attr(dst, src, attribute, vc);
289 src = dst;
290 }
291
292 if (ops->cursor_state.image.fg_color != fg ||
293 ops->cursor_state.image.bg_color != bg ||
294 ops->cursor_reset) {
295 ops->cursor_state.image.fg_color = fg;
296 ops->cursor_state.image.bg_color = bg;
297 cursor.set |= FB_CUR_SETCMAP;
298 }
299
300 if (ops->cursor_state.image.height != vc->vc_font.height ||
301 ops->cursor_state.image.width != vc->vc_font.width ||
302 ops->cursor_reset) {
303 ops->cursor_state.image.height = vc->vc_font.height;
304 ops->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 (ops->cursor_state.image.dx != dx ||
312 ops->cursor_state.image.dy != dy ||
313 ops->cursor_reset) {
314 ops->cursor_state.image.dx = dx;
315 ops->cursor_state.image.dy = dy;
316 cursor.set |= FB_CUR_SETPOS;
317 }
318
319 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
320 ops->cursor_reset) {
321 ops->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 != ops->p->cursor_shape ||
327 ops->cursor_state.mask == NULL ||
328 ops->cursor_reset) {
329 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
330 int cur_height, size, i = 0;
331 u8 msk = 0xff;
332
333 if (!mask)
334 return;
335
336 kfree(ops->cursor_state.mask);
337 ops->cursor_state.mask = mask;
338
339 ops->p->cursor_shape = vc->vc_cursor_type;
340 cursor.set |= FB_CUR_SETSHAPE;
341
342 switch (CUR_SIZE(ops->p->cursor_shape)) {
343 case CUR_NONE:
344 cur_height = 0;
345 break;
346 case CUR_UNDERLINE:
347 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
348 break;
349 case CUR_LOWER_THIRD:
350 cur_height = vc->vc_font.height/3;
351 break;
352 case CUR_LOWER_HALF:
353 cur_height = vc->vc_font.height >> 1;
354 break;
355 case CUR_TWO_THIRDS:
356 cur_height = (vc->vc_font.height << 1)/3;
357 break;
358 case CUR_BLOCK:
359 default:
360 cur_height = vc->vc_font.height;
361 break;
362 }
363
364 size = cur_height * w;
365
366 while (size--)
367 mask[i++] = msk;
368
369 size = (vc->vc_font.height - cur_height) * w;
370
371 while (size--)
372 mask[i++] = ~msk;
373 }
374
375 switch (mode) {
376 case CM_ERASE:
377 ops->cursor_state.enable = 0;
378 break;
379 case CM_DRAW:
380 case CM_MOVE:
381 default:
382 ops->cursor_state.enable = (use_sw) ? 0 : 1;
383 break;
384 }
385
386 cursor.image.data = src;
387 cursor.image.fg_color = ops->cursor_state.image.fg_color;
388 cursor.image.bg_color = ops->cursor_state.image.bg_color;
389 cursor.image.dx = ops->cursor_state.image.dx;
390 cursor.image.dy = ops->cursor_state.image.dy;
391 cursor.image.height = ops->cursor_state.image.height;
392 cursor.image.width = ops->cursor_state.image.width;
393 cursor.hot.x = ops->cursor_state.hot.x;
394 cursor.hot.y = ops->cursor_state.hot.y;
395 cursor.mask = ops->cursor_state.mask;
396 cursor.enable = ops->cursor_state.enable;
397 cursor.image.depth = 1;
398 cursor.rop = ROP_XOR;
399
400 if (info->fbops->fb_cursor)
401 err = info->fbops->fb_cursor(info, &cursor);
402
403 if (err)
404 soft_cursor(info, &cursor);
405
406 ops->cursor_reset = 0;
407 }
408
ud_update_start(struct fb_info * info)409 static int ud_update_start(struct fb_info *info)
410 {
411 struct fbcon_ops *ops = info->fbcon_par;
412 int xoffset, yoffset;
413 u32 vyres = GETVYRES(ops->p, info);
414 u32 vxres = GETVXRES(ops->p, info);
415 int err;
416
417 xoffset = vxres - info->var.xres - ops->var.xoffset;
418 yoffset = vyres - info->var.yres - ops->var.yoffset;
419 if (yoffset < 0)
420 yoffset += vyres;
421 ops->var.xoffset = xoffset;
422 ops->var.yoffset = yoffset;
423 err = fb_pan_display(info, &ops->var);
424 ops->var.xoffset = info->var.xoffset;
425 ops->var.yoffset = info->var.yoffset;
426 ops->var.vmode = info->var.vmode;
427 return err;
428 }
429
fbcon_rotate_ud(struct fbcon_ops * ops)430 void fbcon_rotate_ud(struct fbcon_ops *ops)
431 {
432 ops->bmove = ud_bmove;
433 ops->clear = ud_clear;
434 ops->putcs = ud_putcs;
435 ops->clear_margins = ud_clear_margins;
436 ops->cursor = ud_cursor;
437 ops->update_start = ud_update_start;
438 }
439