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[PATCH] fbcon: Console Rotation - Add support for 180-degree console rotation
[linux-2.6/verdex.git] / drivers / video / console / fbcon_ud.c
blob2e1d9d4249cd0c457e5e0d1c2801f34012560d48
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/config.h>
12 #include <linux/module.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 inline 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
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 display *p = &fb_display[vc->vc_num];
52 struct fb_copyarea area;
53 u32 vyres = GETVYRES(p->scrollmode, info);
54 u32 vxres = GETVXRES(p->scrollmode, 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)
68 {
69 struct display *p = &fb_display[vc->vc_num];
70 struct fb_fillrect region;
71 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
72 u32 vyres = GETVYRES(p->scrollmode, info);
73 u32 vxres = GETVXRES(p->scrollmode, info);
74
75 region.color = attr_bgcol_ec(bgshift,vc);
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, &region);
83 }
84
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
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
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 display *p = &fb_display[vc->vc_num];
157 struct fbcon_ops *ops = info->fbcon_par;
158 u32 width = (vc->vc_font.width + 7)/8;
159 u32 cellsize = width * vc->vc_font.height;
160 u32 maxcnt = info->pixmap.size/cellsize;
161 u32 scan_align = info->pixmap.scan_align - 1;
162 u32 buf_align = info->pixmap.buf_align - 1;
163 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
164 u32 attribute = get_attribute(info, scr_readw(s));
165 u8 *dst, *buf = NULL;
166 u32 vyres = GETVYRES(p->scrollmode, info);
167 u32 vxres = GETVXRES(p->scrollmode, info);
168
169 if (!ops->fontbuffer)
170 return;
171
172 image.fg_color = fg;
173 image.bg_color = bg;
174 image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
175 image.dx = vxres - ((xx + count) * vc->vc_font.width);
176 image.height = vc->vc_font.height;
177 image.depth = 1;
178
179 if (attribute) {
180 buf = kmalloc(cellsize, GFP_KERNEL);
181 if (!buf)
182 return;
183 }
184
185 s += count - 1;
186
187 while (count) {
188 if (count > maxcnt)
189 cnt = maxcnt;
190 else
191 cnt = count;
192
193 image.width = vc->vc_font.width * cnt;
194 pitch = ((image.width + 7) >> 3) + scan_align;
195 pitch &= ~scan_align;
196 size = pitch * image.height + buf_align;
197 size &= ~buf_align;
198 dst = fb_get_buffer_offset(info, &info->pixmap, size);
199 image.data = dst;
200
201 if (!mod)
202 ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
203 width, cellsize, &image, buf, dst);
204 else
205 ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
206 width, cellsize, &image,
207 buf, dst);
208
209 image.dx += image.width;
210 count -= cnt;
211 s -= cnt;
212 xx += cnt;
213 }
214
215 /* buf is always NULL except when in monochrome mode, so in this case
216 it's a gain to check buf against NULL even though kfree() handles
217 NULL pointers just fine */
218 if (unlikely(buf))
219 kfree(buf);
220
221 }
222
223 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
224 int bottom_only)
225 {
226 unsigned int cw = vc->vc_font.width;
227 unsigned int ch = vc->vc_font.height;
228 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
229 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
230 struct fb_fillrect region;
231 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
232
233 region.color = attr_bgcol_ec(bgshift,vc);
234 region.rop = ROP_COPY;
235
236 if (rw && !bottom_only) {
237 region.dy = 0;
238 region.dx = info->var.xoffset;
239 region.width = rw;
240 region.height = info->var.yres_virtual;
241 info->fbops->fb_fillrect(info, &region);
242 }
243
244 if (bh) {
245 region.dy = info->var.yoffset;
246 region.dx = info->var.xoffset;
247 region.height = bh;
248 region.width = info->var.xres;
249 info->fbops->fb_fillrect(info, &region);
250 }
251 }
252
253 static void ud_cursor(struct vc_data *vc, struct fb_info *info,
254 struct display *p, int mode, int softback_lines,
255 int fg, int bg)
256 {
257 struct fb_cursor cursor;
258 struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
259 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
260 int w = (vc->vc_font.width + 7) >> 3, c;
261 int y = real_y(p, vc->vc_y);
262 int attribute, use_sw = (vc->vc_cursor_type & 0x10);
263 int err = 1, dx, dy;
264 char *src;
265 u32 vyres = GETVYRES(p->scrollmode, info);
266 u32 vxres = GETVXRES(p->scrollmode, info);
267
268 if (!ops->fontbuffer)
269 return;
270
271 cursor.set = 0;
272
273 if (softback_lines) {
274 if (y + softback_lines >= vc->vc_rows) {
275 mode = CM_ERASE;
276 ops->cursor_flash = 0;
277 return;
278 } else
279 y += softback_lines;
280 }
281
282 c = scr_readw((u16 *) vc->vc_pos);
283 attribute = get_attribute(info, c);
284 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
285
286 if (ops->cursor_state.image.data != src ||
287 ops->cursor_reset) {
288 ops->cursor_state.image.data = src;
289 cursor.set |= FB_CUR_SETIMAGE;
290 }
291
292 if (attribute) {
293 u8 *dst;
294
295 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
296 if (!dst)
297 return;
298 kfree(ops->cursor_data);
299 ops->cursor_data = dst;
300 ud_update_attr(dst, src, attribute, vc);
301 src = dst;
302 }
303
304 if (ops->cursor_state.image.fg_color != fg ||
305 ops->cursor_state.image.bg_color != bg ||
306 ops->cursor_reset) {
307 ops->cursor_state.image.fg_color = fg;
308 ops->cursor_state.image.bg_color = bg;
309 cursor.set |= FB_CUR_SETCMAP;
310 }
311
312 if (ops->cursor_state.image.height != vc->vc_font.height ||
313 ops->cursor_state.image.width != vc->vc_font.width ||
314 ops->cursor_reset) {
315 ops->cursor_state.image.height = vc->vc_font.height;
316 ops->cursor_state.image.width = vc->vc_font.width;
317 cursor.set |= FB_CUR_SETSIZE;
318 }
319
320 dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
321 dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);
322
323 if (ops->cursor_state.image.dx != dx ||
324 ops->cursor_state.image.dy != dy ||
325 ops->cursor_reset) {
326 ops->cursor_state.image.dx = dx;
327 ops->cursor_state.image.dy = dy;
328 cursor.set |= FB_CUR_SETPOS;
329 }
330
331 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
332 ops->cursor_reset) {
333 ops->cursor_state.hot.x = cursor.hot.y = 0;
334 cursor.set |= FB_CUR_SETHOT;
335 }
336
337 if (cursor.set & FB_CUR_SETSIZE ||
338 vc->vc_cursor_type != p->cursor_shape ||
339 ops->cursor_state.mask == NULL ||
340 ops->cursor_reset) {
341 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
342 int cur_height, size, i = 0;
343 u8 msk = 0xff;
344
345 if (!mask)
346 return;
347
348 kfree(ops->cursor_state.mask);
349 ops->cursor_state.mask = mask;
350
351 p->cursor_shape = vc->vc_cursor_type;
352 cursor.set |= FB_CUR_SETSHAPE;
353
354 switch (p->cursor_shape & CUR_HWMASK) {
355 case CUR_NONE:
356 cur_height = 0;
357 break;
358 case CUR_UNDERLINE:
359 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
360 break;
361 case CUR_LOWER_THIRD:
362 cur_height = vc->vc_font.height/3;
363 break;
364 case CUR_LOWER_HALF:
365 cur_height = vc->vc_font.height >> 1;
366 break;
367 case CUR_TWO_THIRDS:
368 cur_height = (vc->vc_font.height << 1)/3;
369 break;
370 case CUR_BLOCK:
371 default:
372 cur_height = vc->vc_font.height;
373 break;
374 }
375
376 size = cur_height * w;
377
378 while (size--)
379 mask[i++] = msk;
380
381 size = (vc->vc_font.height - cur_height) * w;
382
383 while (size--)
384 mask[i++] = ~msk;
385 }
386
387 switch (mode) {
388 case CM_ERASE:
389 ops->cursor_state.enable = 0;
390 break;
391 case CM_DRAW:
392 case CM_MOVE:
393 default:
394 ops->cursor_state.enable = (use_sw) ? 0 : 1;
395 break;
396 }
397
398 cursor.image.data = src;
399 cursor.image.fg_color = ops->cursor_state.image.fg_color;
400 cursor.image.bg_color = ops->cursor_state.image.bg_color;
401 cursor.image.dx = ops->cursor_state.image.dx;
402 cursor.image.dy = ops->cursor_state.image.dy;
403 cursor.image.height = ops->cursor_state.image.height;
404 cursor.image.width = ops->cursor_state.image.width;
405 cursor.hot.x = ops->cursor_state.hot.x;
406 cursor.hot.y = ops->cursor_state.hot.y;
407 cursor.mask = ops->cursor_state.mask;
408 cursor.enable = ops->cursor_state.enable;
409 cursor.image.depth = 1;
410 cursor.rop = ROP_XOR;
411
412 if (info->fbops->fb_cursor)
413 err = info->fbops->fb_cursor(info, &cursor);
414
415 if (err)
416 soft_cursor(info, &cursor);
417
418 ops->cursor_reset = 0;
419 }
420
421 int ud_update_start(struct fb_info *info)
422 {
423 struct fbcon_ops *ops = info->fbcon_par;
424 struct display *p = &fb_display[ops->currcon];
425 u32 xoffset, yoffset;
426 u32 vyres = GETVYRES(p->scrollmode, info);
427 u32 vxres = GETVXRES(p->scrollmode, info);
428 int err;
429
430 xoffset = (vxres - info->var.xres) - ops->var.xoffset;
431 yoffset = (vyres - info->var.yres) - ops->var.yoffset;
432 ops->var.xoffset = xoffset;
433 ops->var.yoffset = yoffset;
434 err = fb_pan_display(info, &ops->var);
435 ops->var.xoffset = info->var.xoffset;
436 ops->var.yoffset = info->var.yoffset;
437 ops->var.vmode = info->var.vmode;
438 return err;
439 }
440
441 void fbcon_rotate_ud(struct fbcon_ops *ops)
442 {
443 ops->bmove = ud_bmove;
444 ops->clear = ud_clear;
445 ops->putcs = ud_putcs;
446 ops->clear_margins = ud_clear_margins;
447 ops->cursor = ud_cursor;
448 ops->update_start = ud_update_start;
449 }
450 EXPORT_SYMBOL(fbcon_rotate_ud);
451
452 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
453 MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");
454 MODULE_LICENSE("GPL");
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