FB/S3C2410: check default_display parameter passed in platform data
[linux-2.6.git] / drivers / video / console / bitblit.c
1 /*
2  *  linux/drivers/video/console/bitblit.c -- BitBlitting Operation
3  *
4  *  Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
5  *
6  *      Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
7  *
8  *  This file is subject to the terms and conditions of the GNU General Public
9  *  License.  See the file COPYING in the main directory of this archive for
10  *  more details.
11  */
12
13 #include <linux/module.h>
14 #include <linux/string.h>
15 #include <linux/fb.h>
16 #include <linux/vt_kern.h>
17 #include <linux/console.h>
18 #include <asm/types.h>
19 #include "fbcon.h"
20
21 /*
22  * Accelerated handlers.
23  */
24 static inline void 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 = cellsize - (offset * width);
33         for (i = 0; i < cellsize; i++) {
34                 c = src[i];
35                 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
36                         c = 0xff;
37                 if (attribute & FBCON_ATTRIBUTE_BOLD)
38                         c |= c >> 1;
39                 if (attribute & FBCON_ATTRIBUTE_REVERSE)
40                         c = ~c;
41                 dst[i] = c;
42         }
43 }
44
45 static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
46                       int sx, int dy, int dx, int height, int width)
47 {
48         struct fb_copyarea area;
49
50         area.sx = sx * vc->vc_font.width;
51         area.sy = sy * vc->vc_font.height;
52         area.dx = dx * vc->vc_font.width;
53         area.dy = dy * vc->vc_font.height;
54         area.height = height * vc->vc_font.height;
55         area.width = width * vc->vc_font.width;
56
57         info->fbops->fb_copyarea(info, &area);
58 }
59
60 static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
61                       int sx, int height, int width)
62 {
63         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
64         struct fb_fillrect region;
65
66         region.color = attr_bgcol_ec(bgshift, vc);
67         region.dx = sx * vc->vc_font.width;
68         region.dy = sy * vc->vc_font.height;
69         region.width = width * vc->vc_font.width;
70         region.height = height * vc->vc_font.height;
71         region.rop = ROP_COPY;
72
73         info->fbops->fb_fillrect(info, &region);
74 }
75
76 static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
77                                      const u16 *s, u32 attr, u32 cnt,
78                                      u32 d_pitch, u32 s_pitch, u32 cellsize,
79                                      struct fb_image *image, u8 *buf, u8 *dst)
80 {
81         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
82         u32 idx = vc->vc_font.width >> 3;
83         u8 *src;
84
85         while (cnt--) {
86                 src = vc->vc_font.data + (scr_readw(s++)&
87                                           charmask)*cellsize;
88
89                 if (attr) {
90                         update_attr(buf, src, attr, vc);
91                         src = buf;
92                 }
93
94                 if (likely(idx == 1))
95                         __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
96                                                 image->height);
97                 else
98                         fb_pad_aligned_buffer(dst, d_pitch, src, idx,
99                                               image->height);
100
101                 dst += s_pitch;
102         }
103
104         info->fbops->fb_imageblit(info, image);
105 }
106
107 static inline void bit_putcs_unaligned(struct vc_data *vc,
108                                        struct fb_info *info, const u16 *s,
109                                        u32 attr, u32 cnt, u32 d_pitch,
110                                        u32 s_pitch, u32 cellsize,
111                                        struct fb_image *image, u8 *buf,
112                                        u8 *dst)
113 {
114         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
115         u32 shift_low = 0, mod = vc->vc_font.width % 8;
116         u32 shift_high = 8;
117         u32 idx = vc->vc_font.width >> 3;
118         u8 *src;
119
120         while (cnt--) {
121                 src = vc->vc_font.data + (scr_readw(s++)&
122                                           charmask)*cellsize;
123
124                 if (attr) {
125                         update_attr(buf, src, attr, vc);
126                         src = buf;
127                 }
128
129                 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
130                                         image->height, shift_high,
131                                         shift_low, mod);
132                 shift_low += mod;
133                 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
134                 shift_low &= 7;
135                 shift_high = 8 - shift_low;
136         }
137
138         info->fbops->fb_imageblit(info, image);
139
140 }
141
142 static void bit_putcs(struct vc_data *vc, struct fb_info *info,
143                       const unsigned short *s, int count, int yy, int xx,
144                       int fg, int bg)
145 {
146         struct fb_image image;
147         u32 width = (vc->vc_font.width + 7)/8;
148         u32 cellsize = width * vc->vc_font.height;
149         u32 maxcnt = info->pixmap.size/cellsize;
150         u32 scan_align = info->pixmap.scan_align - 1;
151         u32 buf_align = info->pixmap.buf_align - 1;
152         u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
153         u32 attribute = get_attribute(info, scr_readw(s));
154         u8 *dst, *buf = NULL;
155
156         image.fg_color = fg;
157         image.bg_color = bg;
158         image.dx = xx * vc->vc_font.width;
159         image.dy = yy * vc->vc_font.height;
160         image.height = vc->vc_font.height;
161         image.depth = 1;
162
163         if (attribute) {
164                 buf = kmalloc(cellsize, GFP_KERNEL);
165                 if (!buf)
166                         return;
167         }
168
169         while (count) {
170                 if (count > maxcnt)
171                         cnt = maxcnt;
172                 else
173                         cnt = count;
174
175                 image.width = vc->vc_font.width * cnt;
176                 pitch = ((image.width + 7) >> 3) + scan_align;
177                 pitch &= ~scan_align;
178                 size = pitch * image.height + buf_align;
179                 size &= ~buf_align;
180                 dst = fb_get_buffer_offset(info, &info->pixmap, size);
181                 image.data = dst;
182
183                 if (!mod)
184                         bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
185                                           width, cellsize, &image, buf, dst);
186                 else
187                         bit_putcs_unaligned(vc, info, s, attribute, cnt,
188                                             pitch, width, cellsize, &image,
189                                             buf, dst);
190
191                 image.dx += cnt * vc->vc_font.width;
192                 count -= cnt;
193                 s += cnt;
194         }
195
196         /* buf is always NULL except when in monochrome mode, so in this case
197            it's a gain to check buf against NULL even though kfree() handles
198            NULL pointers just fine */
199         if (unlikely(buf))
200                 kfree(buf);
201
202 }
203
204 static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
205                               int bottom_only)
206 {
207         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
208         unsigned int cw = vc->vc_font.width;
209         unsigned int ch = vc->vc_font.height;
210         unsigned int rw = info->var.xres - (vc->vc_cols*cw);
211         unsigned int bh = info->var.yres - (vc->vc_rows*ch);
212         unsigned int rs = info->var.xres - rw;
213         unsigned int bs = info->var.yres - bh;
214         struct fb_fillrect region;
215
216         region.color = attr_bgcol_ec(bgshift, vc);
217         region.rop = ROP_COPY;
218
219         if (rw && !bottom_only) {
220                 region.dx = info->var.xoffset + rs;
221                 region.dy = 0;
222                 region.width = rw;
223                 region.height = info->var.yres_virtual;
224                 info->fbops->fb_fillrect(info, &region);
225         }
226
227         if (bh) {
228                 region.dx = info->var.xoffset;
229                 region.dy = info->var.yoffset + bs;
230                 region.width = rs;
231                 region.height = bh;
232                 info->fbops->fb_fillrect(info, &region);
233         }
234 }
235
236 static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
237                        int softback_lines, int fg, int bg)
238 {
239         struct fb_cursor cursor;
240         struct fbcon_ops *ops = info->fbcon_par;
241         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
242         int w = (vc->vc_font.width + 7) >> 3, c;
243         int y = real_y(ops->p, vc->vc_y);
244         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
245         int err = 1;
246         char *src;
247
248         cursor.set = 0;
249
250         if (softback_lines) {
251                 if (y + softback_lines >= vc->vc_rows) {
252                         mode = CM_ERASE;
253                         ops->cursor_flash = 0;
254                         return;
255                 } else
256                         y += softback_lines;
257         }
258
259         c = scr_readw((u16 *) vc->vc_pos);
260         attribute = get_attribute(info, c);
261         src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
262
263         if (ops->cursor_state.image.data != src ||
264             ops->cursor_reset) {
265             ops->cursor_state.image.data = src;
266             cursor.set |= FB_CUR_SETIMAGE;
267         }
268
269         if (attribute) {
270                 u8 *dst;
271
272                 dst = kmalloc(w * vc->vc_font.height, GFP_ATOMIC);
273                 if (!dst)
274                         return;
275                 kfree(ops->cursor_data);
276                 ops->cursor_data = dst;
277                 update_attr(dst, src, attribute, vc);
278                 src = dst;
279         }
280
281         if (ops->cursor_state.image.fg_color != fg ||
282             ops->cursor_state.image.bg_color != bg ||
283             ops->cursor_reset) {
284                 ops->cursor_state.image.fg_color = fg;
285                 ops->cursor_state.image.bg_color = bg;
286                 cursor.set |= FB_CUR_SETCMAP;
287         }
288
289         if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->vc_x)) ||
290             (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
291             ops->cursor_reset) {
292                 ops->cursor_state.image.dx = vc->vc_font.width * vc->vc_x;
293                 ops->cursor_state.image.dy = vc->vc_font.height * y;
294                 cursor.set |= FB_CUR_SETPOS;
295         }
296
297         if (ops->cursor_state.image.height != vc->vc_font.height ||
298             ops->cursor_state.image.width != vc->vc_font.width ||
299             ops->cursor_reset) {
300                 ops->cursor_state.image.height = vc->vc_font.height;
301                 ops->cursor_state.image.width = vc->vc_font.width;
302                 cursor.set |= FB_CUR_SETSIZE;
303         }
304
305         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
306             ops->cursor_reset) {
307                 ops->cursor_state.hot.x = cursor.hot.y = 0;
308                 cursor.set |= FB_CUR_SETHOT;
309         }
310
311         if (cursor.set & FB_CUR_SETSIZE ||
312             vc->vc_cursor_type != ops->p->cursor_shape ||
313             ops->cursor_state.mask == NULL ||
314             ops->cursor_reset) {
315                 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
316                 int cur_height, size, i = 0;
317                 u8 msk = 0xff;
318
319                 if (!mask)
320                         return;
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                 size = (vc->vc_font.height - cur_height) * w;
350                 while (size--)
351                         mask[i++] = ~msk;
352                 size = cur_height * w;
353                 while (size--)
354                         mask[i++] = msk;
355         }
356
357         switch (mode) {
358         case CM_ERASE:
359                 ops->cursor_state.enable = 0;
360                 break;
361         case CM_DRAW:
362         case CM_MOVE:
363         default:
364                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
365                 break;
366         }
367
368         cursor.image.data = src;
369         cursor.image.fg_color = ops->cursor_state.image.fg_color;
370         cursor.image.bg_color = ops->cursor_state.image.bg_color;
371         cursor.image.dx = ops->cursor_state.image.dx;
372         cursor.image.dy = ops->cursor_state.image.dy;
373         cursor.image.height = ops->cursor_state.image.height;
374         cursor.image.width = ops->cursor_state.image.width;
375         cursor.hot.x = ops->cursor_state.hot.x;
376         cursor.hot.y = ops->cursor_state.hot.y;
377         cursor.mask = ops->cursor_state.mask;
378         cursor.enable = ops->cursor_state.enable;
379         cursor.image.depth = 1;
380         cursor.rop = ROP_XOR;
381
382         if (info->fbops->fb_cursor)
383                 err = info->fbops->fb_cursor(info, &cursor);
384
385         if (err)
386                 soft_cursor(info, &cursor);
387
388         ops->cursor_reset = 0;
389 }
390
391 static int bit_update_start(struct fb_info *info)
392 {
393         struct fbcon_ops *ops = info->fbcon_par;
394         int err;
395
396         err = fb_pan_display(info, &ops->var);
397         ops->var.xoffset = info->var.xoffset;
398         ops->var.yoffset = info->var.yoffset;
399         ops->var.vmode = info->var.vmode;
400         return err;
401 }
402
403 void fbcon_set_bitops(struct fbcon_ops *ops)
404 {
405         ops->bmove = bit_bmove;
406         ops->clear = bit_clear;
407         ops->putcs = bit_putcs;
408         ops->clear_margins = bit_clear_margins;
409         ops->cursor = bit_cursor;
410         ops->update_start = bit_update_start;
411         ops->rotate_font = NULL;
412
413         if (ops->rotate)
414                 fbcon_set_rotate(ops);
415 }
416
417 EXPORT_SYMBOL(fbcon_set_bitops);
418
419 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
420 MODULE_DESCRIPTION("Bit Blitting Operation");
421 MODULE_LICENSE("GPL");
422