Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial
[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/module.h>
12 #include <linux/string.h>
13 #include <linux/fb.h>
14 #include <linux/vt_kern.h>
15 #include <linux/console.h>
16 #include <asm/types.h>
17 #include "fbcon.h"
18 #include "fbcon_rotate.h"
19
20 /*
21  * Rotation 180 degrees
22  */
23
24 static inline void ud_update_attr(u8 *dst, u8 *src, int attribute,
25                                   struct vc_data *vc)
26 {
27         int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
28         int width = (vc->vc_font.width + 7) >> 3;
29         unsigned int cellsize = vc->vc_font.height * width;
30         u8 c;
31
32         offset = offset * width;
33
34         for (i = 0; i < cellsize; i++) {
35                 c = src[i];
36                 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i < offset)
37                         c = 0xff;
38                 if (attribute & FBCON_ATTRIBUTE_BOLD)
39                         c |= c << 1;
40                 if (attribute & FBCON_ATTRIBUTE_REVERSE)
41                         c = ~c;
42                 dst[i] = c;
43         }
44 }
45
46
47 static void ud_bmove(struct vc_data *vc, struct fb_info *info, int sy,
48                      int sx, int dy, int dx, int height, int width)
49 {
50         struct fbcon_ops *ops = info->fbcon_par;
51         struct fb_copyarea area;
52         u32 vyres = GETVYRES(ops->p->scrollmode, info);
53         u32 vxres = GETVXRES(ops->p->scrollmode, info);
54
55         area.sy = vyres - ((sy + height) * vc->vc_font.height);
56         area.sx = vxres - ((sx + width) * vc->vc_font.width);
57         area.dy = vyres - ((dy + height) * vc->vc_font.height);
58         area.dx = vxres - ((dx + width) * vc->vc_font.width);
59         area.height = height * vc->vc_font.height;
60         area.width  = width * vc->vc_font.width;
61
62         info->fbops->fb_copyarea(info, &area);
63 }
64
65 static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
66                      int sx, int height, int width)
67 {
68         struct fbcon_ops *ops = info->fbcon_par;
69         struct fb_fillrect region;
70         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
71         u32 vyres = GETVYRES(ops->p->scrollmode, info);
72         u32 vxres = GETVXRES(ops->p->scrollmode, info);
73
74         region.color = attr_bgcol_ec(bgshift,vc);
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, &region);
82 }
83
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
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
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->scrollmode, info);
165         u32 vxres = GETVXRES(ops->p->scrollmode, 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
221 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
222                              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         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
230
231         region.color = attr_bgcol_ec(bgshift,vc);
232         region.rop = ROP_COPY;
233
234         if (rw && !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, &region);
240         }
241
242         if (bh) {
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, &region);
248         }
249 }
250
251 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
252                       int softback_lines, 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->vc_y);
259         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
260         int err = 1, dx, dy;
261         char *src;
262         u32 vyres = GETVYRES(ops->p->scrollmode, info);
263         u32 vxres = GETVXRES(ops->p->scrollmode, info);
264
265         if (!ops->fontbuffer)
266                 return;
267
268         cursor.set = 0;
269
270         if (softback_lines) {
271                 if (y + softback_lines >= vc->vc_rows) {
272                         mode = CM_ERASE;
273                         ops->cursor_flash = 0;
274                         return;
275                 } else
276                         y += softback_lines;
277         }
278
279         c = scr_readw((u16 *) vc->vc_pos);
280         attribute = get_attribute(info, c);
281         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
282
283         if (ops->cursor_state.image.data != src ||
284             ops->cursor_reset) {
285             ops->cursor_state.image.data = src;
286             cursor.set |= FB_CUR_SETIMAGE;
287         }
288
289         if (attribute) {
290                 u8 *dst;
291
292                 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
293                 if (!dst)
294                         return;
295                 kfree(ops->cursor_data);
296                 ops->cursor_data = dst;
297                 ud_update_attr(dst, src, attribute, vc);
298                 src = dst;
299         }
300
301         if (ops->cursor_state.image.fg_color != fg ||
302             ops->cursor_state.image.bg_color != bg ||
303             ops->cursor_reset) {
304                 ops->cursor_state.image.fg_color = fg;
305                 ops->cursor_state.image.bg_color = bg;
306                 cursor.set |= FB_CUR_SETCMAP;
307         }
308
309         if (ops->cursor_state.image.height != vc->vc_font.height ||
310             ops->cursor_state.image.width != vc->vc_font.width ||
311             ops->cursor_reset) {
312                 ops->cursor_state.image.height = vc->vc_font.height;
313                 ops->cursor_state.image.width = vc->vc_font.width;
314                 cursor.set |= FB_CUR_SETSIZE;
315         }
316
317         dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
318         dx = vxres - ((vc->vc_x * vc->vc_font.width) + vc->vc_font.width);
319
320         if (ops->cursor_state.image.dx != dx ||
321             ops->cursor_state.image.dy != dy ||
322             ops->cursor_reset) {
323                 ops->cursor_state.image.dx = dx;
324                 ops->cursor_state.image.dy = dy;
325                 cursor.set |= FB_CUR_SETPOS;
326         }
327
328         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
329             ops->cursor_reset) {
330                 ops->cursor_state.hot.x = cursor.hot.y = 0;
331                 cursor.set |= FB_CUR_SETHOT;
332         }
333
334         if (cursor.set & FB_CUR_SETSIZE ||
335             vc->vc_cursor_type != ops->p->cursor_shape ||
336             ops->cursor_state.mask == NULL ||
337             ops->cursor_reset) {
338                 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
339                 int cur_height, size, i = 0;
340                 u8 msk = 0xff;
341
342                 if (!mask)
343                         return;
344
345                 kfree(ops->cursor_state.mask);
346                 ops->cursor_state.mask = mask;
347
348                 ops->p->cursor_shape = vc->vc_cursor_type;
349                 cursor.set |= FB_CUR_SETSHAPE;
350
351                 switch (ops->p->cursor_shape & CUR_HWMASK) {
352                 case CUR_NONE:
353                         cur_height = 0;
354                         break;
355                 case CUR_UNDERLINE:
356                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
357                         break;
358                 case CUR_LOWER_THIRD:
359                         cur_height = vc->vc_font.height/3;
360                         break;
361                 case CUR_LOWER_HALF:
362                         cur_height = vc->vc_font.height >> 1;
363                         break;
364                 case CUR_TWO_THIRDS:
365                         cur_height = (vc->vc_font.height << 1)/3;
366                         break;
367                 case CUR_BLOCK:
368                 default:
369                         cur_height = vc->vc_font.height;
370                         break;
371                 }
372
373                 size = cur_height * w;
374
375                 while (size--)
376                         mask[i++] = msk;
377
378                 size = (vc->vc_font.height - cur_height) * w;
379
380                 while (size--)
381                         mask[i++] = ~msk;
382         }
383
384         switch (mode) {
385         case CM_ERASE:
386                 ops->cursor_state.enable = 0;
387                 break;
388         case CM_DRAW:
389         case CM_MOVE:
390         default:
391                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
392                 break;
393         }
394
395         cursor.image.data = src;
396         cursor.image.fg_color = ops->cursor_state.image.fg_color;
397         cursor.image.bg_color = ops->cursor_state.image.bg_color;
398         cursor.image.dx = ops->cursor_state.image.dx;
399         cursor.image.dy = ops->cursor_state.image.dy;
400         cursor.image.height = ops->cursor_state.image.height;
401         cursor.image.width = ops->cursor_state.image.width;
402         cursor.hot.x = ops->cursor_state.hot.x;
403         cursor.hot.y = ops->cursor_state.hot.y;
404         cursor.mask = ops->cursor_state.mask;
405         cursor.enable = ops->cursor_state.enable;
406         cursor.image.depth = 1;
407         cursor.rop = ROP_XOR;
408
409         if (info->fbops->fb_cursor)
410                 err = info->fbops->fb_cursor(info, &cursor);
411
412         if (err)
413                 soft_cursor(info, &cursor);
414
415         ops->cursor_reset = 0;
416 }
417
418 static int ud_update_start(struct fb_info *info)
419 {
420         struct fbcon_ops *ops = info->fbcon_par;
421         int xoffset, yoffset;
422         u32 vyres = GETVYRES(ops->p->scrollmode, info);
423         u32 vxres = GETVXRES(ops->p->scrollmode, info);
424         int err;
425
426         xoffset = vxres - info->var.xres - ops->var.xoffset;
427         yoffset = vyres - info->var.yres - ops->var.yoffset;
428         if (yoffset < 0)
429                 yoffset += vyres;
430         ops->var.xoffset = xoffset;
431         ops->var.yoffset = yoffset;
432         err = fb_pan_display(info, &ops->var);
433         ops->var.xoffset = info->var.xoffset;
434         ops->var.yoffset = info->var.yoffset;
435         ops->var.vmode = info->var.vmode;
436         return err;
437 }
438
439 void fbcon_rotate_ud(struct fbcon_ops *ops)
440 {
441         ops->bmove = ud_bmove;
442         ops->clear = ud_clear;
443         ops->putcs = ud_putcs;
444         ops->clear_margins = ud_clear_margins;
445         ops->cursor = ud_cursor;
446         ops->update_start = ud_update_start;
447 }
448 EXPORT_SYMBOL(fbcon_rotate_ud);
449
450 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
451 MODULE_DESCRIPTION("Console Rotation (180 degrees) Support");
452 MODULE_LICENSE("GPL");