Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[linux-2.6] / drivers / video / console / 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/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 fbcon_ops *ops = info->fbcon_par;
52         struct fb_copyarea area;
53         u32 vyres = GETVYRES(ops->p->scrollmode, info);
54         u32 vxres = GETVXRES(ops->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 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->scrollmode, info);
73         u32 vxres = GETVXRES(ops->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 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->scrollmode, info);
166         u32 vxres = GETVXRES(ops->p->scrollmode, 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
222 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
223                              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         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
231
232         region.color = attr_bgcol_ec(bgshift,vc);
233         region.rop = ROP_COPY;
234
235         if (rw && !bottom_only) {
236                 region.dy = 0;
237                 region.dx = info->var.xoffset;
238                 region.width  = rw;
239                 region.height = info->var.yres_virtual;
240                 info->fbops->fb_fillrect(info, &region);
241         }
242
243         if (bh) {
244                 region.dy = info->var.yoffset;
245                 region.dx = info->var.xoffset;
246                 region.height  = bh;
247                 region.width = info->var.xres;
248                 info->fbops->fb_fillrect(info, &region);
249         }
250 }
251
252 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
253                       int softback_lines, int fg, int bg)
254 {
255         struct fb_cursor cursor;
256         struct fbcon_ops *ops = info->fbcon_par;
257         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
258         int w = (vc->vc_font.width + 7) >> 3, c;
259         int y = real_y(ops->p, vc->vc_y);
260         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
261         int err = 1, dx, dy;
262         char *src;
263         u32 vyres = GETVYRES(ops->p->scrollmode, info);
264         u32 vxres = GETVXRES(ops->p->scrollmode, info);
265
266         if (!ops->fontbuffer)
267                 return;
268
269         cursor.set = 0;
270
271         if (softback_lines) {
272                 if (y + softback_lines >= vc->vc_rows) {
273                         mode = CM_ERASE;
274                         ops->cursor_flash = 0;
275                         return;
276                 } else
277                         y += softback_lines;
278         }
279
280         c = scr_readw((u16 *) vc->vc_pos);
281         attribute = get_attribute(info, c);
282         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
283
284         if (ops->cursor_state.image.data != src ||
285             ops->cursor_reset) {
286             ops->cursor_state.image.data = src;
287             cursor.set |= FB_CUR_SETIMAGE;
288         }
289
290         if (attribute) {
291                 u8 *dst;
292
293                 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
294                 if (!dst)
295                         return;
296                 kfree(ops->cursor_data);
297                 ops->cursor_data = dst;
298                 ud_update_attr(dst, src, attribute, vc);
299                 src = dst;
300         }
301
302         if (ops->cursor_state.image.fg_color != fg ||
303             ops->cursor_state.image.bg_color != bg ||
304             ops->cursor_reset) {
305                 ops->cursor_state.image.fg_color = fg;
306                 ops->cursor_state.image.bg_color = bg;
307                 cursor.set |= FB_CUR_SETCMAP;
308         }
309
310         if (ops->cursor_state.image.height != vc->vc_font.height ||
311             ops->cursor_state.image.width != vc->vc_font.width ||
312             ops->cursor_reset) {
313                 ops->cursor_state.image.height = vc->vc_font.height;
314                 ops->cursor_state.image.width = vc->vc_font.width;
315                 cursor.set |= FB_CUR_SETSIZE;
316         }
317
318         dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
319         dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);
320
321         if (ops->cursor_state.image.dx != dx ||
322             ops->cursor_state.image.dy != dy ||
323             ops->cursor_reset) {
324                 ops->cursor_state.image.dx = dx;
325                 ops->cursor_state.image.dy = dy;
326                 cursor.set |= FB_CUR_SETPOS;
327         }
328
329         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
330             ops->cursor_reset) {
331                 ops->cursor_state.hot.x = cursor.hot.y = 0;
332                 cursor.set |= FB_CUR_SETHOT;
333         }
334
335         if (cursor.set & FB_CUR_SETSIZE ||
336             vc->vc_cursor_type != ops->p->cursor_shape ||
337             ops->cursor_state.mask == NULL ||
338             ops->cursor_reset) {
339                 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
340                 int cur_height, size, i = 0;
341                 u8 msk = 0xff;
342
343                 if (!mask)
344                         return;
345
346                 kfree(ops->cursor_state.mask);
347                 ops->cursor_state.mask = mask;
348
349                 ops->p->cursor_shape = vc->vc_cursor_type;
350                 cursor.set |= FB_CUR_SETSHAPE;
351
352                 switch (ops->p->cursor_shape & CUR_HWMASK) {
353                 case CUR_NONE:
354                         cur_height = 0;
355                         break;
356                 case CUR_UNDERLINE:
357                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
358                         break;
359                 case CUR_LOWER_THIRD:
360                         cur_height = vc->vc_font.height/3;
361                         break;
362                 case CUR_LOWER_HALF:
363                         cur_height = vc->vc_font.height >> 1;
364                         break;
365                 case CUR_TWO_THIRDS:
366                         cur_height = (vc->vc_font.height << 1)/3;
367                         break;
368                 case CUR_BLOCK:
369                 default:
370                         cur_height = vc->vc_font.height;
371                         break;
372                 }
373
374                 size = cur_height * w;
375
376                 while (size--)
377                         mask[i++] = msk;
378
379                 size = (vc->vc_font.height - cur_height) * w;
380
381                 while (size--)
382                         mask[i++] = ~msk;
383         }
384
385         switch (mode) {
386         case CM_ERASE:
387                 ops->cursor_state.enable = 0;
388                 break;
389         case CM_DRAW:
390         case CM_MOVE:
391         default:
392                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
393                 break;
394         }
395
396         cursor.image.data = src;
397         cursor.image.fg_color = ops->cursor_state.image.fg_color;
398         cursor.image.bg_color = ops->cursor_state.image.bg_color;
399         cursor.image.dx = ops->cursor_state.image.dx;
400         cursor.image.dy = ops->cursor_state.image.dy;
401         cursor.image.height = ops->cursor_state.image.height;
402         cursor.image.width = ops->cursor_state.image.width;
403         cursor.hot.x = ops->cursor_state.hot.x;
404         cursor.hot.y = ops->cursor_state.hot.y;
405         cursor.mask = ops->cursor_state.mask;
406         cursor.enable = ops->cursor_state.enable;
407         cursor.image.depth = 1;
408         cursor.rop = ROP_XOR;
409
410         if (info->fbops->fb_cursor)
411                 err = info->fbops->fb_cursor(info, &cursor);
412
413         if (err)
414                 soft_cursor(info, &cursor);
415
416         ops->cursor_reset = 0;
417 }
418
419 int ud_update_start(struct fb_info *info)
420 {
421         struct fbcon_ops *ops = info->fbcon_par;
422         int xoffset, yoffset;
423         u32 vyres = GETVYRES(ops->p->scrollmode, info);
424         u32 vxres = GETVXRES(ops->p->scrollmode, info);
425         int err;
426
427         xoffset = vxres - info->var.xres - ops->var.xoffset;
428         yoffset = vyres - info->var.yres - ops->var.yoffset;
429         if (yoffset < 0)
430                 yoffset += vyres;
431         ops->var.xoffset = xoffset;
432         ops->var.yoffset = yoffset;
433         err = fb_pan_display(info, &ops->var);
434         ops->var.xoffset = info->var.xoffset;
435         ops->var.yoffset = info->var.yoffset;
436         ops->var.vmode = info->var.vmode;
437         return err;
438 }
439
440 void fbcon_rotate_ud(struct fbcon_ops *ops)
441 {
442         ops->bmove = ud_bmove;
443         ops->clear = ud_clear;
444         ops->putcs = ud_putcs;
445         ops->clear_margins = ud_clear_margins;
446         ops->cursor = ud_cursor;
447         ops->update_start = ud_update_start;
448 }
449 EXPORT_SYMBOL(fbcon_rotate_ud);
450
451 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
452 MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");
453 MODULE_LICENSE("GPL");