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,int fg,int bg)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_ops *ops = info->fbcon_par;
70 struct fb_fillrect region;
71 u32 vyres = GETVYRES(ops->p, info);
72 u32 vxres = GETVXRES(ops->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
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)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_ops *ops = 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 = ops->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
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)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_ops *ops = 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 = ops->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
ud_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)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_ops *ops = 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(ops->p, info);
165 u32 vxres = GETVXRES(ops->p, info);
166
167 if (!ops->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
ud_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)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
ud_cursor(struct vc_data * vc,struct fb_info * info,int mode,int fg,int bg)250 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
251 int fg, int bg)
252 {
253 struct fb_cursor cursor;
254 struct fbcon_ops *ops = 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(ops->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(ops->p, info);
262 u32 vxres = GETVXRES(ops->p, info);
263
264 if (!ops->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 = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
272
273 if (ops->cursor_state.image.data != src ||
274 ops->cursor_reset) {
275 ops->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(ops->cursor_data);
286 ops->cursor_data = dst;
287 ud_update_attr(dst, src, attribute, vc);
288 src = dst;
289 }
290
291 if (ops->cursor_state.image.fg_color != fg ||
292 ops->cursor_state.image.bg_color != bg ||
293 ops->cursor_reset) {
294 ops->cursor_state.image.fg_color = fg;
295 ops->cursor_state.image.bg_color = bg;
296 cursor.set |= FB_CUR_SETCMAP;
297 }
298
299 if (ops->cursor_state.image.height != vc->vc_font.height ||
300 ops->cursor_state.image.width != vc->vc_font.width ||
301 ops->cursor_reset) {
302 ops->cursor_state.image.height = vc->vc_font.height;
303 ops->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 (ops->cursor_state.image.dx != dx ||
311 ops->cursor_state.image.dy != dy ||
312 ops->cursor_reset) {
313 ops->cursor_state.image.dx = dx;
314 ops->cursor_state.image.dy = dy;
315 cursor.set |= FB_CUR_SETPOS;
316 }
317
318 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
319 ops->cursor_reset) {
320 ops->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 != ops->p->cursor_shape ||
326 ops->cursor_state.mask == NULL ||
327 ops->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(ops->cursor_state.mask);
336 ops->cursor_state.mask = mask;
337
338 ops->p->cursor_shape = vc->vc_cursor_type;
339 cursor.set |= FB_CUR_SETSHAPE;
340
341 switch (CUR_SIZE(ops->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 switch (mode) {
375 case CM_ERASE:
376 ops->cursor_state.enable = 0;
377 break;
378 case CM_DRAW:
379 case CM_MOVE:
380 default:
381 ops->cursor_state.enable = (use_sw) ? 0 : 1;
382 break;
383 }
384
385 cursor.image.data = src;
386 cursor.image.fg_color = ops->cursor_state.image.fg_color;
387 cursor.image.bg_color = ops->cursor_state.image.bg_color;
388 cursor.image.dx = ops->cursor_state.image.dx;
389 cursor.image.dy = ops->cursor_state.image.dy;
390 cursor.image.height = ops->cursor_state.image.height;
391 cursor.image.width = ops->cursor_state.image.width;
392 cursor.hot.x = ops->cursor_state.hot.x;
393 cursor.hot.y = ops->cursor_state.hot.y;
394 cursor.mask = ops->cursor_state.mask;
395 cursor.enable = ops->cursor_state.enable;
396 cursor.image.depth = 1;
397 cursor.rop = ROP_XOR;
398
399 if (info->fbops->fb_cursor)
400 err = info->fbops->fb_cursor(info, &cursor);
401
402 if (err)
403 soft_cursor(info, &cursor);
404
405 ops->cursor_reset = 0;
406 }
407
ud_update_start(struct fb_info * info)408 static int ud_update_start(struct fb_info *info)
409 {
410 struct fbcon_ops *ops = info->fbcon_par;
411 int xoffset, yoffset;
412 u32 vyres = GETVYRES(ops->p, info);
413 u32 vxres = GETVXRES(ops->p, info);
414 int err;
415
416 xoffset = vxres - info->var.xres - ops->var.xoffset;
417 yoffset = vyres - info->var.yres - ops->var.yoffset;
418 if (yoffset < 0)
419 yoffset += vyres;
420 ops->var.xoffset = xoffset;
421 ops->var.yoffset = yoffset;
422 err = fb_pan_display(info, &ops->var);
423 ops->var.xoffset = info->var.xoffset;
424 ops->var.yoffset = info->var.yoffset;
425 ops->var.vmode = info->var.vmode;
426 return err;
427 }
428
fbcon_rotate_ud(struct fbcon_ops * ops)429 void fbcon_rotate_ud(struct fbcon_ops *ops)
430 {
431 ops->bmove = ud_bmove;
432 ops->clear = ud_clear;
433 ops->putcs = ud_putcs;
434 ops->clear_margins = ud_clear_margins;
435 ops->cursor = ud_cursor;
436 ops->update_start = ud_update_start;
437 }
438