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Add linux-next specific files for 20110801
[linux-2.6/next.git] / drivers / video / console / fbcon_ccw.c
blob41b32ae23dacb9f3dac50a52066ef5f276729d2c
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/module.h>
12 #include <linux/slab.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 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,info);
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,info);
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 static 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");
linux-next