Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6-microblaze.git] / drivers / video / console / fbcon_cw.c
1 /*
2  *  linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 90 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 90 degrees
23  */
24
25 static inline void cw_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         u8 c, t = 0, msk = ~(0xff >> offset);
31
32         for (i = 0; i < vc->vc_font.width; i++) {
33                 for (j = 0; j < width; j++) {
34                         c = *src;
35                         if (attribute & FBCON_ATTRIBUTE_UNDERLINE && !j)
36                                 c |= msk;
37                         if (attribute & FBCON_ATTRIBUTE_BOLD && i)
38                                 c |= *(src-width);
39                         if (attribute & FBCON_ATTRIBUTE_REVERSE)
40                                 c = ~c;
41                         src++;
42                         *dst++ = c;
43                         t = c;
44                 }
45         }
46 }
47
48
49 static void cw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
50                      int sx, int dy, int dx, int height, int width)
51 {
52         struct fbcon_ops *ops = info->fbcon_par;
53         struct fb_copyarea area;
54         u32 vxres = GETVXRES(ops->p->scrollmode, info);
55
56         area.sx = vxres - ((sy + height) * vc->vc_font.height);
57         area.sy = sx * vc->vc_font.width;
58         area.dx = vxres - ((dy + height) * vc->vc_font.height);
59         area.dy = dx * vc->vc_font.width;
60         area.width = height * vc->vc_font.height;
61         area.height  = width * vc->vc_font.width;
62
63         info->fbops->fb_copyarea(info, &area);
64 }
65
66 static void cw_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 vxres = GETVXRES(ops->p->scrollmode, info);
73
74         region.color = attr_bgcol_ec(bgshift,vc);
75         region.dx = vxres - ((sy + height) * vc->vc_font.height);
76         region.dy = sx *  vc->vc_font.width;
77         region.height = width * vc->vc_font.width;
78         region.width = height * vc->vc_font.height;
79         region.rop = ROP_COPY;
80
81         info->fbops->fb_fillrect(info, &region);
82 }
83
84 static inline void cw_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.height + 7) >> 3;
92         u8 *src;
93
94         while (cnt--) {
95                 src = ops->fontbuffer + (scr_readw(s++) & charmask)*cellsize;
96
97                 if (attr) {
98                         cw_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                                                 vc->vc_font.width);
105                 else
106                         fb_pad_aligned_buffer(dst, d_pitch, src, idx,
107                                               vc->vc_font.width);
108
109                 dst += d_pitch * vc->vc_font.width;
110         }
111
112         info->fbops->fb_imageblit(info, image);
113 }
114
115 static void cw_putcs(struct vc_data *vc, struct fb_info *info,
116                       const unsigned short *s, int count, int yy, int xx,
117                       int fg, int bg)
118 {
119         struct fb_image image;
120         struct fbcon_ops *ops = info->fbcon_par;
121         u32 width = (vc->vc_font.height + 7)/8;
122         u32 cellsize = width * vc->vc_font.width;
123         u32 maxcnt = info->pixmap.size/cellsize;
124         u32 scan_align = info->pixmap.scan_align - 1;
125         u32 buf_align = info->pixmap.buf_align - 1;
126         u32 cnt, pitch, size;
127         u32 attribute = get_attribute(info, scr_readw(s));
128         u8 *dst, *buf = NULL;
129         u32 vxres = GETVXRES(ops->p->scrollmode, info);
130
131         if (!ops->fontbuffer)
132                 return;
133
134         image.fg_color = fg;
135         image.bg_color = bg;
136         image.dx = vxres - ((yy + 1) * vc->vc_font.height);
137         image.dy = xx * vc->vc_font.width;
138         image.width = vc->vc_font.height;
139         image.depth = 1;
140
141         if (attribute) {
142                 buf = kmalloc(cellsize, GFP_KERNEL);
143                 if (!buf)
144                         return;
145         }
146
147         while (count) {
148                 if (count > maxcnt)
149                         cnt = maxcnt;
150                 else
151                         cnt = count;
152
153                 image.height = vc->vc_font.width * cnt;
154                 pitch = ((image.width + 7) >> 3) + scan_align;
155                 pitch &= ~scan_align;
156                 size = pitch * image.height + buf_align;
157                 size &= ~buf_align;
158                 dst = fb_get_buffer_offset(info, &info->pixmap, size);
159                 image.data = dst;
160                 cw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
161                                  width, cellsize, &image, buf, dst);
162                 image.dy += image.height;
163                 count -= cnt;
164                 s += cnt;
165         }
166
167         /* buf is always NULL except when in monochrome mode, so in this case
168            it's a gain to check buf against NULL even though kfree() handles
169            NULL pointers just fine */
170         if (unlikely(buf))
171                 kfree(buf);
172
173 }
174
175 static void cw_clear_margins(struct vc_data *vc, struct fb_info *info,
176                              int bottom_only)
177 {
178         unsigned int cw = vc->vc_font.width;
179         unsigned int ch = vc->vc_font.height;
180         unsigned int rw = info->var.yres - (vc->vc_cols*cw);
181         unsigned int bh = info->var.xres - (vc->vc_rows*ch);
182         unsigned int rs = info->var.yres - rw;
183         struct fb_fillrect region;
184         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
185
186         region.color = attr_bgcol_ec(bgshift,vc);
187         region.rop = ROP_COPY;
188
189         if (rw && !bottom_only) {
190                 region.dx = 0;
191                 region.dy = info->var.yoffset + rs;
192                 region.height = rw;
193                 region.width = info->var.xres_virtual;
194                 info->fbops->fb_fillrect(info, &region);
195         }
196
197         if (bh) {
198                 region.dx = info->var.xoffset;
199                 region.dy = info->var.yoffset;
200                 region.height = info->var.yres;
201                 region.width = bh;
202                 info->fbops->fb_fillrect(info, &region);
203         }
204 }
205
206 static void cw_cursor(struct vc_data *vc, struct fb_info *info,
207                       struct display *p, int mode, int softback_lines,
208                       int fg, int bg)
209 {
210         struct fb_cursor cursor;
211         struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
212         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
213         int w = (vc->vc_font.height + 7) >> 3, c;
214         int y = real_y(p, vc->vc_y);
215         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
216         int err = 1, dx, dy;
217         char *src;
218         u32 vxres = GETVXRES(p->scrollmode, info);
219
220         if (!ops->fontbuffer)
221                 return;
222
223         cursor.set = 0;
224
225         if (softback_lines) {
226                 if (y + softback_lines >= vc->vc_rows) {
227                         mode = CM_ERASE;
228                         ops->cursor_flash = 0;
229                         return;
230                 } else
231                         y += softback_lines;
232         }
233
234         c = scr_readw((u16 *) vc->vc_pos);
235         attribute = get_attribute(info, c);
236         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
237
238         if (ops->cursor_state.image.data != src ||
239             ops->cursor_reset) {
240             ops->cursor_state.image.data = src;
241             cursor.set |= FB_CUR_SETIMAGE;
242         }
243
244         if (attribute) {
245                 u8 *dst;
246
247                 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
248                 if (!dst)
249                         return;
250                 kfree(ops->cursor_data);
251                 ops->cursor_data = dst;
252                 cw_update_attr(dst, src, attribute, vc);
253                 src = dst;
254         }
255
256         if (ops->cursor_state.image.fg_color != fg ||
257             ops->cursor_state.image.bg_color != bg ||
258             ops->cursor_reset) {
259                 ops->cursor_state.image.fg_color = fg;
260                 ops->cursor_state.image.bg_color = bg;
261                 cursor.set |= FB_CUR_SETCMAP;
262         }
263
264         if (ops->cursor_state.image.height != vc->vc_font.width ||
265             ops->cursor_state.image.width != vc->vc_font.height ||
266             ops->cursor_reset) {
267                 ops->cursor_state.image.height = vc->vc_font.width;
268                 ops->cursor_state.image.width = vc->vc_font.height;
269                 cursor.set |= FB_CUR_SETSIZE;
270         }
271
272         dx = vxres - ((y * vc->vc_font.height) + vc->vc_font.height);
273         dy = vc->vc_x * vc->vc_font.width;
274
275         if (ops->cursor_state.image.dx != dx ||
276             ops->cursor_state.image.dy != dy ||
277             ops->cursor_reset) {
278                 ops->cursor_state.image.dx = dx;
279                 ops->cursor_state.image.dy = dy;
280                 cursor.set |= FB_CUR_SETPOS;
281         }
282
283         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
284             ops->cursor_reset) {
285                 ops->cursor_state.hot.x = cursor.hot.y = 0;
286                 cursor.set |= FB_CUR_SETHOT;
287         }
288
289         if (cursor.set & FB_CUR_SETSIZE ||
290             vc->vc_cursor_type != p->cursor_shape ||
291             ops->cursor_state.mask == NULL ||
292             ops->cursor_reset) {
293                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
294                 int cur_height, size, i = 0;
295                 int width = (vc->vc_font.width + 7)/8;
296
297                 if (!mask)
298                         return;
299
300                 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
301
302                 if (!tmp) {
303                         kfree(mask);
304                         return;
305                 }
306
307                 kfree(ops->cursor_state.mask);
308                 ops->cursor_state.mask = mask;
309
310                 p->cursor_shape = vc->vc_cursor_type;
311                 cursor.set |= FB_CUR_SETSHAPE;
312
313                 switch (p->cursor_shape & CUR_HWMASK) {
314                 case CUR_NONE:
315                         cur_height = 0;
316                         break;
317                 case CUR_UNDERLINE:
318                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
319                         break;
320                 case CUR_LOWER_THIRD:
321                         cur_height = vc->vc_font.height/3;
322                         break;
323                 case CUR_LOWER_HALF:
324                         cur_height = vc->vc_font.height >> 1;
325                         break;
326                 case CUR_TWO_THIRDS:
327                         cur_height = (vc->vc_font.height << 1)/3;
328                         break;
329                 case CUR_BLOCK:
330                 default:
331                         cur_height = vc->vc_font.height;
332                         break;
333                 }
334
335                 size = (vc->vc_font.height - cur_height) * width;
336                 while (size--)
337                         tmp[i++] = 0;
338                 size = cur_height * width;
339                 while (size--)
340                         tmp[i++] = 0xff;
341                 memset(mask, 0, w * vc->vc_font.width);
342                 rotate_cw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
343                 kfree(tmp);
344         }
345
346         switch (mode) {
347         case CM_ERASE:
348                 ops->cursor_state.enable = 0;
349                 break;
350         case CM_DRAW:
351         case CM_MOVE:
352         default:
353                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
354                 break;
355         }
356
357         cursor.image.data = src;
358         cursor.image.fg_color = ops->cursor_state.image.fg_color;
359         cursor.image.bg_color = ops->cursor_state.image.bg_color;
360         cursor.image.dx = ops->cursor_state.image.dx;
361         cursor.image.dy = ops->cursor_state.image.dy;
362         cursor.image.height = ops->cursor_state.image.height;
363         cursor.image.width = ops->cursor_state.image.width;
364         cursor.hot.x = ops->cursor_state.hot.x;
365         cursor.hot.y = ops->cursor_state.hot.y;
366         cursor.mask = ops->cursor_state.mask;
367         cursor.enable = ops->cursor_state.enable;
368         cursor.image.depth = 1;
369         cursor.rop = ROP_XOR;
370
371         if (info->fbops->fb_cursor)
372                 err = info->fbops->fb_cursor(info, &cursor);
373
374         if (err)
375                 soft_cursor(info, &cursor);
376
377         ops->cursor_reset = 0;
378 }
379
380 int cw_update_start(struct fb_info *info)
381 {
382         struct fbcon_ops *ops = info->fbcon_par;
383         u32 vxres = GETVXRES(ops->p->scrollmode, info);
384         u32 xoffset;
385         int err;
386
387         xoffset = vxres - (info->var.xres + ops->var.yoffset);
388         ops->var.yoffset = ops->var.xoffset;
389         ops->var.xoffset = xoffset;
390         err = fb_pan_display(info, &ops->var);
391         ops->var.xoffset = info->var.xoffset;
392         ops->var.yoffset = info->var.yoffset;
393         ops->var.vmode = info->var.vmode;
394         return err;
395 }
396
397 void fbcon_rotate_cw(struct fbcon_ops *ops)
398 {
399         ops->bmove = cw_bmove;
400         ops->clear = cw_clear;
401         ops->putcs = cw_putcs;
402         ops->clear_margins = cw_clear_margins;
403         ops->cursor = cw_cursor;
404         ops->update_start = cw_update_start;
405 }
406 EXPORT_SYMBOL(fbcon_rotate_cw);
407
408 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
409 MODULE_DESCRIPTION("Console Rotation (90 degrees) Support");
410 MODULE_LICENSE("GPL");