FB/S3C2410: check default_display parameter passed in platform data
[linux-2.6.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/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 90 degrees
22  */
23
24 static inline void cw_update_attr(u8 *dst, u8 *src, int attribute,
25                                   struct vc_data *vc)
26 {
27         int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
28         int width = (vc->vc_font.height + 7) >> 3;
29         u8 c, t = 0, msk = ~(0xff >> offset);
30
31         for (i = 0; i < vc->vc_font.width; i++) {
32                 for (j = 0; j < width; j++) {
33                         c = *src;
34                         if (attribute & FBCON_ATTRIBUTE_UNDERLINE && !j)
35                                 c |= msk;
36                         if (attribute & FBCON_ATTRIBUTE_BOLD && i)
37                                 c |= *(src-width);
38                         if (attribute & FBCON_ATTRIBUTE_REVERSE)
39                                 c = ~c;
40                         src++;
41                         *dst++ = c;
42                         t = c;
43                 }
44         }
45 }
46
47
48 static void cw_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 vxres = GETVXRES(ops->p->scrollmode, info);
54
55         area.sx = vxres - ((sy + height) * vc->vc_font.height);
56         area.sy = sx * vc->vc_font.width;
57         area.dx = vxres - ((dy + height) * vc->vc_font.height);
58         area.dy = dx * vc->vc_font.width;
59         area.width = height * vc->vc_font.height;
60         area.height  = width * vc->vc_font.width;
61
62         info->fbops->fb_copyarea(info, &area);
63 }
64
65 static void cw_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 vxres = GETVXRES(ops->p->scrollmode, info);
72
73         region.color = attr_bgcol_ec(bgshift,vc);
74         region.dx = vxres - ((sy + height) * vc->vc_font.height);
75         region.dy = sx *  vc->vc_font.width;
76         region.height = width * vc->vc_font.width;
77         region.width = height * vc->vc_font.height;
78         region.rop = ROP_COPY;
79
80         info->fbops->fb_fillrect(info, &region);
81 }
82
83 static inline void cw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
84                                     const u16 *s, u32 attr, u32 cnt,
85                                     u32 d_pitch, u32 s_pitch, u32 cellsize,
86                                     struct fb_image *image, u8 *buf, u8 *dst)
87 {
88         struct fbcon_ops *ops = info->fbcon_par;
89         u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
90         u32 idx = (vc->vc_font.height + 7) >> 3;
91         u8 *src;
92
93         while (cnt--) {
94                 src = ops->fontbuffer + (scr_readw(s++) & charmask)*cellsize;
95
96                 if (attr) {
97                         cw_update_attr(buf, src, attr, vc);
98                         src = buf;
99                 }
100
101                 if (likely(idx == 1))
102                         __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
103                                                 vc->vc_font.width);
104                 else
105                         fb_pad_aligned_buffer(dst, d_pitch, src, idx,
106                                               vc->vc_font.width);
107
108                 dst += d_pitch * vc->vc_font.width;
109         }
110
111         info->fbops->fb_imageblit(info, image);
112 }
113
114 static void cw_putcs(struct vc_data *vc, struct fb_info *info,
115                       const unsigned short *s, int count, int yy, int xx,
116                       int fg, int bg)
117 {
118         struct fb_image image;
119         struct fbcon_ops *ops = info->fbcon_par;
120         u32 width = (vc->vc_font.height + 7)/8;
121         u32 cellsize = width * vc->vc_font.width;
122         u32 maxcnt = info->pixmap.size/cellsize;
123         u32 scan_align = info->pixmap.scan_align - 1;
124         u32 buf_align = info->pixmap.buf_align - 1;
125         u32 cnt, pitch, size;
126         u32 attribute = get_attribute(info, scr_readw(s));
127         u8 *dst, *buf = NULL;
128         u32 vxres = GETVXRES(ops->p->scrollmode, info);
129
130         if (!ops->fontbuffer)
131                 return;
132
133         image.fg_color = fg;
134         image.bg_color = bg;
135         image.dx = vxres - ((yy + 1) * vc->vc_font.height);
136         image.dy = xx * vc->vc_font.width;
137         image.width = vc->vc_font.height;
138         image.depth = 1;
139
140         if (attribute) {
141                 buf = kmalloc(cellsize, GFP_KERNEL);
142                 if (!buf)
143                         return;
144         }
145
146         while (count) {
147                 if (count > maxcnt)
148                         cnt = maxcnt;
149                 else
150                         cnt = count;
151
152                 image.height = vc->vc_font.width * cnt;
153                 pitch = ((image.width + 7) >> 3) + scan_align;
154                 pitch &= ~scan_align;
155                 size = pitch * image.height + buf_align;
156                 size &= ~buf_align;
157                 dst = fb_get_buffer_offset(info, &info->pixmap, size);
158                 image.data = dst;
159                 cw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
160                                  width, cellsize, &image, buf, dst);
161                 image.dy += image.height;
162                 count -= cnt;
163                 s += cnt;
164         }
165
166         /* buf is always NULL except when in monochrome mode, so in this case
167            it's a gain to check buf against NULL even though kfree() handles
168            NULL pointers just fine */
169         if (unlikely(buf))
170                 kfree(buf);
171
172 }
173
174 static void cw_clear_margins(struct vc_data *vc, struct fb_info *info,
175                              int bottom_only)
176 {
177         unsigned int cw = vc->vc_font.width;
178         unsigned int ch = vc->vc_font.height;
179         unsigned int rw = info->var.yres - (vc->vc_cols*cw);
180         unsigned int bh = info->var.xres - (vc->vc_rows*ch);
181         unsigned int rs = info->var.yres - rw;
182         struct fb_fillrect region;
183         int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
184
185         region.color = attr_bgcol_ec(bgshift,vc);
186         region.rop = ROP_COPY;
187
188         if (rw && !bottom_only) {
189                 region.dx = 0;
190                 region.dy = info->var.yoffset + rs;
191                 region.height = rw;
192                 region.width = info->var.xres_virtual;
193                 info->fbops->fb_fillrect(info, &region);
194         }
195
196         if (bh) {
197                 region.dx = info->var.xoffset;
198                 region.dy = info->var.yoffset;
199                 region.height = info->var.yres;
200                 region.width = bh;
201                 info->fbops->fb_fillrect(info, &region);
202         }
203 }
204
205 static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
206                       int softback_lines, int fg, int bg)
207 {
208         struct fb_cursor cursor;
209         struct fbcon_ops *ops = info->fbcon_par;
210         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
211         int w = (vc->vc_font.height + 7) >> 3, c;
212         int y = real_y(ops->p, vc->vc_y);
213         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
214         int err = 1, dx, dy;
215         char *src;
216         u32 vxres = GETVXRES(ops->p->scrollmode, info);
217
218         if (!ops->fontbuffer)
219                 return;
220
221         cursor.set = 0;
222
223         if (softback_lines) {
224                 if (y + softback_lines >= vc->vc_rows) {
225                         mode = CM_ERASE;
226                         ops->cursor_flash = 0;
227                         return;
228                 } else
229                         y += softback_lines;
230         }
231
232         c = scr_readw((u16 *) vc->vc_pos);
233         attribute = get_attribute(info, c);
234         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
235
236         if (ops->cursor_state.image.data != src ||
237             ops->cursor_reset) {
238             ops->cursor_state.image.data = src;
239             cursor.set |= FB_CUR_SETIMAGE;
240         }
241
242         if (attribute) {
243                 u8 *dst;
244
245                 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
246                 if (!dst)
247                         return;
248                 kfree(ops->cursor_data);
249                 ops->cursor_data = dst;
250                 cw_update_attr(dst, src, attribute, vc);
251                 src = dst;
252         }
253
254         if (ops->cursor_state.image.fg_color != fg ||
255             ops->cursor_state.image.bg_color != bg ||
256             ops->cursor_reset) {
257                 ops->cursor_state.image.fg_color = fg;
258                 ops->cursor_state.image.bg_color = bg;
259                 cursor.set |= FB_CUR_SETCMAP;
260         }
261
262         if (ops->cursor_state.image.height != vc->vc_font.width ||
263             ops->cursor_state.image.width != vc->vc_font.height ||
264             ops->cursor_reset) {
265                 ops->cursor_state.image.height = vc->vc_font.width;
266                 ops->cursor_state.image.width = vc->vc_font.height;
267                 cursor.set |= FB_CUR_SETSIZE;
268         }
269
270         dx = vxres - ((y * vc->vc_font.height) + vc->vc_font.height);
271         dy = vc->vc_x * vc->vc_font.width;
272
273         if (ops->cursor_state.image.dx != dx ||
274             ops->cursor_state.image.dy != dy ||
275             ops->cursor_reset) {
276                 ops->cursor_state.image.dx = dx;
277                 ops->cursor_state.image.dy = dy;
278                 cursor.set |= FB_CUR_SETPOS;
279         }
280
281         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
282             ops->cursor_reset) {
283                 ops->cursor_state.hot.x = cursor.hot.y = 0;
284                 cursor.set |= FB_CUR_SETHOT;
285         }
286
287         if (cursor.set & FB_CUR_SETSIZE ||
288             vc->vc_cursor_type != ops->p->cursor_shape ||
289             ops->cursor_state.mask == NULL ||
290             ops->cursor_reset) {
291                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
292                 int cur_height, size, i = 0;
293                 int width = (vc->vc_font.width + 7)/8;
294
295                 if (!mask)
296                         return;
297
298                 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
299
300                 if (!tmp) {
301                         kfree(mask);
302                         return;
303                 }
304
305                 kfree(ops->cursor_state.mask);
306                 ops->cursor_state.mask = mask;
307
308                 ops->p->cursor_shape = vc->vc_cursor_type;
309                 cursor.set |= FB_CUR_SETSHAPE;
310
311                 switch (ops->p->cursor_shape & CUR_HWMASK) {
312                 case CUR_NONE:
313                         cur_height = 0;
314                         break;
315                 case CUR_UNDERLINE:
316                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
317                         break;
318                 case CUR_LOWER_THIRD:
319                         cur_height = vc->vc_font.height/3;
320                         break;
321                 case CUR_LOWER_HALF:
322                         cur_height = vc->vc_font.height >> 1;
323                         break;
324                 case CUR_TWO_THIRDS:
325                         cur_height = (vc->vc_font.height << 1)/3;
326                         break;
327                 case CUR_BLOCK:
328                 default:
329                         cur_height = vc->vc_font.height;
330                         break;
331                 }
332
333                 size = (vc->vc_font.height - cur_height) * width;
334                 while (size--)
335                         tmp[i++] = 0;
336                 size = cur_height * width;
337                 while (size--)
338                         tmp[i++] = 0xff;
339                 memset(mask, 0, w * vc->vc_font.width);
340                 rotate_cw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
341                 kfree(tmp);
342         }
343
344         switch (mode) {
345         case CM_ERASE:
346                 ops->cursor_state.enable = 0;
347                 break;
348         case CM_DRAW:
349         case CM_MOVE:
350         default:
351                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
352                 break;
353         }
354
355         cursor.image.data = src;
356         cursor.image.fg_color = ops->cursor_state.image.fg_color;
357         cursor.image.bg_color = ops->cursor_state.image.bg_color;
358         cursor.image.dx = ops->cursor_state.image.dx;
359         cursor.image.dy = ops->cursor_state.image.dy;
360         cursor.image.height = ops->cursor_state.image.height;
361         cursor.image.width = ops->cursor_state.image.width;
362         cursor.hot.x = ops->cursor_state.hot.x;
363         cursor.hot.y = ops->cursor_state.hot.y;
364         cursor.mask = ops->cursor_state.mask;
365         cursor.enable = ops->cursor_state.enable;
366         cursor.image.depth = 1;
367         cursor.rop = ROP_XOR;
368
369         if (info->fbops->fb_cursor)
370                 err = info->fbops->fb_cursor(info, &cursor);
371
372         if (err)
373                 soft_cursor(info, &cursor);
374
375         ops->cursor_reset = 0;
376 }
377
378 static int cw_update_start(struct fb_info *info)
379 {
380         struct fbcon_ops *ops = info->fbcon_par;
381         u32 vxres = GETVXRES(ops->p->scrollmode, info);
382         u32 xoffset;
383         int err;
384
385         xoffset = vxres - (info->var.xres + ops->var.yoffset);
386         ops->var.yoffset = ops->var.xoffset;
387         ops->var.xoffset = xoffset;
388         err = fb_pan_display(info, &ops->var);
389         ops->var.xoffset = info->var.xoffset;
390         ops->var.yoffset = info->var.yoffset;
391         ops->var.vmode = info->var.vmode;
392         return err;
393 }
394
395 void fbcon_rotate_cw(struct fbcon_ops *ops)
396 {
397         ops->bmove = cw_bmove;
398         ops->clear = cw_clear;
399         ops->putcs = cw_putcs;
400         ops->clear_margins = cw_clear_margins;
401         ops->cursor = cw_cursor;
402         ops->update_start = cw_update_start;
403 }
404 EXPORT_SYMBOL(fbcon_rotate_cw);
405
406 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
407 MODULE_DESCRIPTION("Console Rotation (90 degrees) Support");
408 MODULE_LICENSE("GPL");