Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6] / 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, int mode,
207                       int softback_lines, int fg, int bg)
208 {
209         struct fb_cursor cursor;
210         struct fbcon_ops *ops = info->fbcon_par;
211         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
212         int w = (vc->vc_font.height + 7) >> 3, c;
213         int y = real_y(ops->p, vc->vc_y);
214         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
215         int err = 1, dx, dy;
216         char *src;
217         u32 vxres = GETVXRES(ops->p->scrollmode, info);
218
219         if (!ops->fontbuffer)
220                 return;
221
222         cursor.set = 0;
223
224         if (softback_lines) {
225                 if (y + softback_lines >= vc->vc_rows) {
226                         mode = CM_ERASE;
227                         ops->cursor_flash = 0;
228                         return;
229                 } else
230                         y += softback_lines;
231         }
232
233         c = scr_readw((u16 *) vc->vc_pos);
234         attribute = get_attribute(info, c);
235         src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
236
237         if (ops->cursor_state.image.data != src ||
238             ops->cursor_reset) {
239             ops->cursor_state.image.data = src;
240             cursor.set |= FB_CUR_SETIMAGE;
241         }
242
243         if (attribute) {
244                 u8 *dst;
245
246                 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
247                 if (!dst)
248                         return;
249                 kfree(ops->cursor_data);
250                 ops->cursor_data = dst;
251                 cw_update_attr(dst, src, attribute, vc);
252                 src = dst;
253         }
254
255         if (ops->cursor_state.image.fg_color != fg ||
256             ops->cursor_state.image.bg_color != bg ||
257             ops->cursor_reset) {
258                 ops->cursor_state.image.fg_color = fg;
259                 ops->cursor_state.image.bg_color = bg;
260                 cursor.set |= FB_CUR_SETCMAP;
261         }
262
263         if (ops->cursor_state.image.height != vc->vc_font.width ||
264             ops->cursor_state.image.width != vc->vc_font.height ||
265             ops->cursor_reset) {
266                 ops->cursor_state.image.height = vc->vc_font.width;
267                 ops->cursor_state.image.width = vc->vc_font.height;
268                 cursor.set |= FB_CUR_SETSIZE;
269         }
270
271         dx = vxres - ((y * vc->vc_font.height) + vc->vc_font.height);
272         dy = vc->vc_x * vc->vc_font.width;
273
274         if (ops->cursor_state.image.dx != dx ||
275             ops->cursor_state.image.dy != dy ||
276             ops->cursor_reset) {
277                 ops->cursor_state.image.dx = dx;
278                 ops->cursor_state.image.dy = dy;
279                 cursor.set |= FB_CUR_SETPOS;
280         }
281
282         if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
283             ops->cursor_reset) {
284                 ops->cursor_state.hot.x = cursor.hot.y = 0;
285                 cursor.set |= FB_CUR_SETHOT;
286         }
287
288         if (cursor.set & FB_CUR_SETSIZE ||
289             vc->vc_cursor_type != ops->p->cursor_shape ||
290             ops->cursor_state.mask == NULL ||
291             ops->cursor_reset) {
292                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
293                 int cur_height, size, i = 0;
294                 int width = (vc->vc_font.width + 7)/8;
295
296                 if (!mask)
297                         return;
298
299                 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
300
301                 if (!tmp) {
302                         kfree(mask);
303                         return;
304                 }
305
306                 kfree(ops->cursor_state.mask);
307                 ops->cursor_state.mask = mask;
308
309                 ops->p->cursor_shape = vc->vc_cursor_type;
310                 cursor.set |= FB_CUR_SETSHAPE;
311
312                 switch (ops->p->cursor_shape & CUR_HWMASK) {
313                 case CUR_NONE:
314                         cur_height = 0;
315                         break;
316                 case CUR_UNDERLINE:
317                         cur_height = (vc->vc_font.height < 10) ? 1 : 2;
318                         break;
319                 case CUR_LOWER_THIRD:
320                         cur_height = vc->vc_font.height/3;
321                         break;
322                 case CUR_LOWER_HALF:
323                         cur_height = vc->vc_font.height >> 1;
324                         break;
325                 case CUR_TWO_THIRDS:
326                         cur_height = (vc->vc_font.height << 1)/3;
327                         break;
328                 case CUR_BLOCK:
329                 default:
330                         cur_height = vc->vc_font.height;
331                         break;
332                 }
333
334                 size = (vc->vc_font.height - cur_height) * width;
335                 while (size--)
336                         tmp[i++] = 0;
337                 size = cur_height * width;
338                 while (size--)
339                         tmp[i++] = 0xff;
340                 memset(mask, 0, w * vc->vc_font.width);
341                 rotate_cw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
342                 kfree(tmp);
343         }
344
345         switch (mode) {
346         case CM_ERASE:
347                 ops->cursor_state.enable = 0;
348                 break;
349         case CM_DRAW:
350         case CM_MOVE:
351         default:
352                 ops->cursor_state.enable = (use_sw) ? 0 : 1;
353                 break;
354         }
355
356         cursor.image.data = src;
357         cursor.image.fg_color = ops->cursor_state.image.fg_color;
358         cursor.image.bg_color = ops->cursor_state.image.bg_color;
359         cursor.image.dx = ops->cursor_state.image.dx;
360         cursor.image.dy = ops->cursor_state.image.dy;
361         cursor.image.height = ops->cursor_state.image.height;
362         cursor.image.width = ops->cursor_state.image.width;
363         cursor.hot.x = ops->cursor_state.hot.x;
364         cursor.hot.y = ops->cursor_state.hot.y;
365         cursor.mask = ops->cursor_state.mask;
366         cursor.enable = ops->cursor_state.enable;
367         cursor.image.depth = 1;
368         cursor.rop = ROP_XOR;
369
370         if (info->fbops->fb_cursor)
371                 err = info->fbops->fb_cursor(info, &cursor);
372
373         if (err)
374                 soft_cursor(info, &cursor);
375
376         ops->cursor_reset = 0;
377 }
378
379 int cw_update_start(struct fb_info *info)
380 {
381         struct fbcon_ops *ops = info->fbcon_par;
382         u32 vxres = GETVXRES(ops->p->scrollmode, info);
383         u32 xoffset;
384         int err;
385
386         xoffset = vxres - (info->var.xres + ops->var.yoffset);
387         ops->var.yoffset = ops->var.xoffset;
388         ops->var.xoffset = xoffset;
389         err = fb_pan_display(info, &ops->var);
390         ops->var.xoffset = info->var.xoffset;
391         ops->var.yoffset = info->var.yoffset;
392         ops->var.vmode = info->var.vmode;
393         return err;
394 }
395
396 void fbcon_rotate_cw(struct fbcon_ops *ops)
397 {
398         ops->bmove = cw_bmove;
399         ops->clear = cw_clear;
400         ops->putcs = cw_putcs;
401         ops->clear_margins = cw_clear_margins;
402         ops->cursor = cw_cursor;
403         ops->update_start = cw_update_start;
404 }
405 EXPORT_SYMBOL(fbcon_rotate_cw);
406
407 MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
408 MODULE_DESCRIPTION("Console Rotation (90 degrees) Support");
409 MODULE_LICENSE("GPL");