Merge with /home/shaggy/git/linus-clean/
[pandora-kernel.git] / drivers / video / console / fbcon_ccw.c
1 /*
2  *  linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 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 270 degrees
23  */
24
25 static inline void ccw_update_attr(u8 *dst, u8 *src, int attribute,
26                                   struct vc_data *vc)
27 {
28         int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
29         int width = (vc->vc_font.height + 7) >> 3;
30         int mod = vc->vc_font.height % 8;
31         u8 c, msk = ~(0xff << offset), msk1 = 0;
32
33         if (mod)
34                 msk <<= (8 - mod);
35
36         if (offset > mod)
37                 msk1 |= 0x01;
38
39         for (i = 0; i < vc->vc_font.width; i++) {
40                 for (j = 0; j < width; j++) {
41                         c = *src;
42
43                         if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
44                                 if (j == width - 1)
45                                         c |= msk;
46
47                                 if (msk1 && j == width - 2)
48                                         c |= msk1;
49                         }
50
51                         if (attribute & FBCON_ATTRIBUTE_BOLD && i)
52                                 *(dst - width) |= c;
53
54                         if (attribute & FBCON_ATTRIBUTE_REVERSE)
55                                 c = ~c;
56                         src++;
57                         *dst++ = c;
58                 }
59         }
60 }
61
62
63 static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
64                      int sx, int dy, int dx, int height, int width)
65 {
66         struct fbcon_ops *ops = info->fbcon_par;
67         struct fb_copyarea area;
68         u32 vyres = GETVYRES(ops->p->scrollmode, info);
69
70         area.sx = sy * vc->vc_font.height;
71         area.sy = vyres - ((sx + width) * vc->vc_font.width);
72         area.dx = dy * vc->vc_font.height;
73         area.dy = vyres - ((dx + width) * vc->vc_font.width);
74         area.width = height * vc->vc_font.height;
75         area.height  = width * vc->vc_font.width;
76
77         info->fbops->fb_copyarea(info, &area);
78 }
79
80 static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
81                      int sx, int height, int width)
82 {
83         struct fbcon_ops *ops = info->fbcon_par;
84         struct fb_fillrect region;
85         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
86         u32 vyres = GETVYRES(ops->p->scrollmode, info);
87
88         region.color = attr_bgcol_ec(bgshift,vc);
89         region.dx = sy * vc->vc_font.height;
90         region.dy = vyres - ((sx + width) * vc->vc_font.width);
91         region.height = width * vc->vc_font.width;
92         region.width = height * vc->vc_font.height;
93         region.rop = ROP_COPY;
94
95         info->fbops->fb_fillrect(info, &region);
96 }
97
98 static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
99                                     const u16 *s, u32 attr, u32 cnt,
100                                     u32 d_pitch, u32 s_pitch, u32 cellsize,
101                                     struct fb_image *image, u8 *buf, u8 *dst)
102 {
103         struct fbcon_ops *ops = info->fbcon_par;
104         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
105         u32 idx = (vc->vc_font.height + 7) >> 3;
106         u8 *src;
107
108         while (cnt--) {
109                 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
110
111                 if (attr) {
112                         ccw_update_attr(buf, src, attr, vc);
113                         src = buf;
114                 }
115
116                 if (likely(idx == 1))
117                         __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
118                                                 vc->vc_font.width);
119                 else
120                         fb_pad_aligned_buffer(dst, d_pitch, src, idx,
121                                               vc->vc_font.width);
122
123                 dst += d_pitch * vc->vc_font.width;
124         }
125
126         info->fbops->fb_imageblit(info, image);
127 }
128
129 static void ccw_putcs(struct vc_data *vc, struct fb_info *info,
130                       const unsigned short *s, int count, int yy, int xx,
131                       int fg, int bg)
132 {
133         struct fb_image image;
134         struct fbcon_ops *ops = info->fbcon_par;
135         u32 width = (vc->vc_font.height + 7)/8;
136         u32 cellsize = width * vc->vc_font.width;
137         u32 maxcnt = info->pixmap.size/cellsize;
138         u32 scan_align = info->pixmap.scan_align - 1;
139         u32 buf_align = info->pixmap.buf_align - 1;
140         u32 cnt, pitch, size;
141         u32 attribute = get_attribute(info, scr_readw(s));
142         u8 *dst, *buf = NULL;
143         u32 vyres = GETVYRES(ops->p->scrollmode, info);
144
145         if (!ops->fontbuffer)
146                 return;
147
148         image.fg_color = fg;
149         image.bg_color = bg;
150         image.dx = yy * vc->vc_font.height;
151         image.dy = vyres - ((xx + count) * vc->vc_font.width);
152         image.width = vc->vc_font.height;
153         image.depth = 1;
154
155         if (attribute) {
156                 buf = kmalloc(cellsize, GFP_KERNEL);
157                 if (!buf)
158                         return;
159         }
160
161         s += count - 1;
162
163         while (count) {
164                 if (count > maxcnt)
165                         cnt = maxcnt;
166                 else
167                         cnt = count;
168
169                 image.height = vc->vc_font.width * cnt;
170                 pitch = ((image.width + 7) >> 3) + scan_align;
171                 pitch &= ~scan_align;
172                 size = pitch * image.height + buf_align;
173                 size &= ~buf_align;
174                 dst = fb_get_buffer_offset(info, &info->pixmap, size);
175                 image.data = dst;
176                 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
177                                  width, cellsize, &image, buf, dst);
178                 image.dy += image.height;
179                 count -= cnt;
180                 s -= cnt;
181         }
182
183         /* buf is always NULL except when in monochrome mode, so in this case
184            it's a gain to check buf against NULL even though kfree() handles
185            NULL pointers just fine */
186         if (unlikely(buf))
187                 kfree(buf);
188
189 }
190
191 static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
192                              int bottom_only)
193 {
194         unsigned int cw = vc->vc_font.width;
195         unsigned int ch = vc->vc_font.height;
196         unsigned int rw = info->var.yres - (vc->vc_cols*cw);
197         unsigned int bh = info->var.xres - (vc->vc_rows*ch);
198         unsigned int bs = vc->vc_rows*ch;
199         struct fb_fillrect region;
200         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
201
202         region.color = attr_bgcol_ec(bgshift,vc);
203         region.rop = ROP_COPY;
204
205         if (rw && !bottom_only) {
206                 region.dx = 0;
207                 region.dy = info->var.yoffset;
208                 region.height = rw;
209                 region.width = info->var.xres_virtual;
210                 info->fbops->fb_fillrect(info, &region);
211         }
212
213         if (bh) {
214                 region.dx = info->var.xoffset + bs;
215                 region.dy = 0;
216                 region.height = info->var.yres_virtual;
217                 region.width = bh;
218                 info->fbops->fb_fillrect(info, &region);
219         }
220 }
221
222 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
223                        int softback_lines, int fg, int bg)
224 {
225         struct fb_cursor cursor;
226         struct fbcon_ops *ops = info->fbcon_par;
227         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
228         int w = (vc->vc_font.height + 7) >> 3, c;
229         int y = real_y(ops->p, vc->vc_y);
230         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
231         int err = 1, dx, dy;
232         char *src;
233         u32 vyres = GETVYRES(ops->p->scrollmode, info);
234
235         if (!ops->fontbuffer)
236                 return;
237
238         cursor.set = 0;
239
240         if (softback_lines) {
241                 if (y + softback_lines >= vc->vc_rows) {
242                         mode = CM_ERASE;
243                         ops->cursor_flash = 0;
244                         return;
245                 } else
246                         y += softback_lines;
247         }
248
249         c = scr_readw((u16 *) vc->vc_pos);
250         attribute = get_attribute(info, c);
251         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
252
253         if (ops->cursor_state.image.data != src ||
254             ops->cursor_reset) {
255             ops->cursor_state.image.data = src;
256             cursor.set |= FB_CUR_SETIMAGE;
257         }
258
259         if (attribute) {
260                 u8 *dst;
261
262                 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
263                 if (!dst)
264                         return;
265                 kfree(ops->cursor_data);
266                 ops->cursor_data = dst;
267                 ccw_update_attr(dst, src, attribute, vc);
268                 src = dst;
269         }
270
271         if (ops->cursor_state.image.fg_color != fg ||
272             ops->cursor_state.image.bg_color != bg ||
273             ops->cursor_reset) {
274                 ops->cursor_state.image.fg_color = fg;
275                 ops->cursor_state.image.bg_color = bg;
276                 cursor.set |= FB_CUR_SETCMAP;
277         }
278
279         if (ops->cursor_state.image.height != vc->vc_font.width ||
280             ops->cursor_state.image.width != vc->vc_font.height ||
281             ops->cursor_reset) {
282                 ops->cursor_state.image.height = vc->vc_font.width;
283                 ops->cursor_state.image.width = vc->vc_font.height;
284                 cursor.set |= FB_CUR_SETSIZE;
285         }
286
287         dx = y * vc->vc_font.height;
288         dy = vyres - ((vc->vc_x + 1) * vc->vc_font.width);
289
290         if (ops->cursor_state.image.dx != dx ||
291             ops->cursor_state.image.dy != dy ||
292             ops->cursor_reset) {
293                 ops->cursor_state.image.dx = dx;
294                 ops->cursor_state.image.dy = dy;
295                 cursor.set |= FB_CUR_SETPOS;
296         }
297
298         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
299             ops->cursor_reset) {
300                 ops->cursor_state.hot.x = cursor.hot.y = 0;
301                 cursor.set |= FB_CUR_SETHOT;
302         }
303
304         if (cursor.set & FB_CUR_SETSIZE ||
305             vc->vc_cursor_type != ops->p->cursor_shape ||
306             ops->cursor_state.mask == NULL ||
307             ops->cursor_reset) {
308                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
309                 int cur_height, size, i = 0;
310                 int width = (vc->vc_font.width + 7)/8;
311
312                 if (!mask)
313                         return;
314
315                 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
316
317                 if (!tmp) {
318                         kfree(mask);
319                         return;
320                 }
321
322                 kfree(ops->cursor_state.mask);
323                 ops->cursor_state.mask = mask;
324
325                 ops->p->cursor_shape = vc->vc_cursor_type;
326                 cursor.set |= FB_CUR_SETSHAPE;
327
328                 switch (ops->p->cursor_shape & CUR_HWMASK) {
329                 case CUR_NONE:
330                         cur_height = 0;
331                         break;
332                 case CUR_UNDERLINE:
333                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
334                         break;
335                 case CUR_LOWER_THIRD:
336                         cur_height = vc->vc_font.height/3;
337                         break;
338                 case CUR_LOWER_HALF:
339                         cur_height = vc->vc_font.height >> 1;
340                         break;
341                 case CUR_TWO_THIRDS:
342                         cur_height = (vc->vc_font.height << 1)/3;
343                         break;
344                 case CUR_BLOCK:
345                 default:
346                         cur_height = vc->vc_font.height;
347                         break;
348                 }
349
350                 size = (vc->vc_font.height - cur_height) * width;
351                 while (size--)
352                         tmp[i++] = 0;
353                 size = cur_height * width;
354                 while (size--)
355                         tmp[i++] = 0xff;
356                 memset(mask, 0, w * vc->vc_font.width);
357                 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
358                 kfree(tmp);
359         }
360
361         switch (mode) {
362         case CM_ERASE:
363                 ops->cursor_state.enable = 0;
364                 break;
365         case CM_DRAW:
366         case CM_MOVE:
367         default:
368                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
369                 break;
370         }
371
372         cursor.image.data = src;
373         cursor.image.fg_color = ops->cursor_state.image.fg_color;
374         cursor.image.bg_color = ops->cursor_state.image.bg_color;
375         cursor.image.dx = ops->cursor_state.image.dx;
376         cursor.image.dy = ops->cursor_state.image.dy;
377         cursor.image.height = ops->cursor_state.image.height;
378         cursor.image.width = ops->cursor_state.image.width;
379         cursor.hot.x = ops->cursor_state.hot.x;
380         cursor.hot.y = ops->cursor_state.hot.y;
381         cursor.mask = ops->cursor_state.mask;
382         cursor.enable = ops->cursor_state.enable;
383         cursor.image.depth = 1;
384         cursor.rop = ROP_XOR;
385
386         if (info->fbops->fb_cursor)
387                 err = info->fbops->fb_cursor(info, &cursor);
388
389         if (err)
390                 soft_cursor(info, &cursor);
391
392         ops->cursor_reset = 0;
393 }
394
395 int ccw_update_start(struct fb_info *info)
396 {
397         struct fbcon_ops *ops = info->fbcon_par;
398         u32 yoffset;
399         u32 vyres = GETVYRES(ops->p->scrollmode, info);
400         int err;
401
402         yoffset = (vyres - info->var.yres) - ops->var.xoffset;
403         ops->var.xoffset = ops->var.yoffset;
404         ops->var.yoffset = yoffset;
405         err = fb_pan_display(info, &ops->var);
406         ops->var.xoffset = info->var.xoffset;
407         ops->var.yoffset = info->var.yoffset;
408         ops->var.vmode = info->var.vmode;
409         return err;
410 }
411
412 void fbcon_rotate_ccw(struct fbcon_ops *ops)
413 {
414         ops->bmove = ccw_bmove;
415         ops->clear = ccw_clear;
416         ops->putcs = ccw_putcs;
417         ops->clear_margins = ccw_clear_margins;
418         ops->cursor = ccw_cursor;
419         ops->update_start = ccw_update_start;
420 }
421 EXPORT_SYMBOL(fbcon_rotate_ccw);
422
423 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
424 MODULE_DESCRIPTION("Console Rotation (270 degrees) Support");
425 MODULE_LICENSE("GPL");