1 /*
2 * linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 180 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 180 degrees
23 */
24
ud_update_attr(u8 * dst,u8 * src,int attribute,struct vc_data * vc)25 static void ud_update_attr(u8 *dst, u8 *src, int attribute,
26 struct vc_data *vc)
27 {
28 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
29 int width = (vc->vc_font.width + 7) >> 3;
30 unsigned int cellsize = vc->vc_font.height * width;
31 u8 c;
32
33 offset = offset * width;
34
35 for (i = 0; i < cellsize; i++) {
36 c = src[i];
37 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i < offset)
38 c = 0xff;
39 if (attribute & FBCON_ATTRIBUTE_BOLD)
40 c |= c << 1;
41 if (attribute & FBCON_ATTRIBUTE_REVERSE)
42 c = ~c;
43 dst[i] = c;
44 }
45 }
46
ud_clear(struct vc_data * vc,struct fb_info * info,int sy,int sx,int height,int width)47 static void ud_clear(struct vc_data *vc, struct fb_info *info, int sy,
48 int sx, int height, int width)
49 {
50 struct fb_fillrect region;
51 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
52 u32 vyres = info->var.yres;
53 u32 vxres = info->var.xres;
54
55 region.color = attr_bgcol_ec(bgshift,vc,info);
56 region.dy = vyres - ((sy + height) * vc->vc_font.height);
57 region.dx = vxres - ((sx + width) * vc->vc_font.width);
58 region.width = width * vc->vc_font.width;
59 region.height = height * vc->vc_font.height;
60 region.rop = ROP_COPY;
61
62 info->fbops->fb_fillrect(info, ®ion);
63 }
64
ud_putcs_aligned(struct vc_data * vc,struct fb_info * info,const u16 * s,u32 attr,u32 cnt,u32 d_pitch,u32 s_pitch,u32 cellsize,struct fb_image * image,u8 * buf,u8 * dst)65 static inline void ud_putcs_aligned(struct vc_data *vc, struct fb_info *info,
66 const u16 *s, u32 attr, u32 cnt,
67 u32 d_pitch, u32 s_pitch, u32 cellsize,
68 struct fb_image *image, u8 *buf, u8 *dst)
69 {
70 struct fbcon_ops *ops = info->fbcon_par;
71 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
72 u32 idx = vc->vc_font.width >> 3;
73 u8 *src;
74
75 while (cnt--) {
76 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
77
78 if (attr) {
79 ud_update_attr(buf, src, attr, vc);
80 src = buf;
81 }
82
83 if (likely(idx == 1))
84 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
85 image->height);
86 else
87 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
88 image->height);
89
90 dst += s_pitch;
91 }
92
93 info->fbops->fb_imageblit(info, image);
94 }
95
ud_putcs_unaligned(struct vc_data * vc,struct fb_info * info,const u16 * s,u32 attr,u32 cnt,u32 d_pitch,u32 s_pitch,u32 cellsize,struct fb_image * image,u8 * buf,u8 * dst)96 static inline void ud_putcs_unaligned(struct vc_data *vc,
97 struct fb_info *info, const u16 *s,
98 u32 attr, u32 cnt, u32 d_pitch,
99 u32 s_pitch, u32 cellsize,
100 struct fb_image *image, u8 *buf,
101 u8 *dst)
102 {
103 struct fbcon_ops *ops = info->fbcon_par;
104 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
105 u32 shift_low = 0, mod = vc->vc_font.width % 8;
106 u32 shift_high = 8;
107 u32 idx = vc->vc_font.width >> 3;
108 u8 *src;
109
110 while (cnt--) {
111 src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
112
113 if (attr) {
114 ud_update_attr(buf, src, attr, vc);
115 src = buf;
116 }
117
118 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
119 image->height, shift_high,
120 shift_low, mod);
121 shift_low += mod;
122 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
123 shift_low &= 7;
124 shift_high = 8 - shift_low;
125 }
126
127 info->fbops->fb_imageblit(info, image);
128
129 }
130
ud_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)131 static void ud_putcs(struct vc_data *vc, struct fb_info *info,
132 const unsigned short *s, int count, int yy, int xx,
133 int fg, int bg)
134 {
135 struct fb_image image;
136 struct fbcon_ops *ops = info->fbcon_par;
137 u32 width = (vc->vc_font.width + 7)/8;
138 u32 cellsize = width * vc->vc_font.height;
139 u32 maxcnt = info->pixmap.size/cellsize;
140 u32 scan_align = info->pixmap.scan_align - 1;
141 u32 buf_align = info->pixmap.buf_align - 1;
142 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
143 u32 attribute = get_attribute(info, scr_readw(s));
144 u8 *dst, *buf = NULL;
145 u32 vyres = info->var.yres;
146 u32 vxres = info->var.xres;
147
148 if (!ops->fontbuffer)
149 return;
150
151 image.fg_color = fg;
152 image.bg_color = bg;
153 image.dy = vyres - ((yy * vc->vc_font.height) + vc->vc_font.height);
154 image.dx = vxres - ((xx + count) * vc->vc_font.width);
155 image.height = vc->vc_font.height;
156 image.depth = 1;
157
158 if (attribute) {
159 buf = kmalloc(cellsize, GFP_KERNEL);
160 if (!buf)
161 return;
162 }
163
164 s += count - 1;
165
166 while (count) {
167 if (count > maxcnt)
168 cnt = maxcnt;
169 else
170 cnt = count;
171
172 image.width = vc->vc_font.width * cnt;
173 pitch = ((image.width + 7) >> 3) + scan_align;
174 pitch &= ~scan_align;
175 size = pitch * image.height + buf_align;
176 size &= ~buf_align;
177 dst = fb_get_buffer_offset(info, &info->pixmap, size);
178 image.data = dst;
179
180 if (!mod)
181 ud_putcs_aligned(vc, info, s, attribute, cnt, pitch,
182 width, cellsize, &image, buf, dst);
183 else
184 ud_putcs_unaligned(vc, info, s, attribute, cnt, pitch,
185 width, cellsize, &image,
186 buf, dst);
187
188 image.dx += image.width;
189 count -= cnt;
190 s -= cnt;
191 xx += cnt;
192 }
193
194 /* buf is always NULL except when in monochrome mode, so in this case
195 it's a gain to check buf against NULL even though kfree() handles
196 NULL pointers just fine */
197 if (unlikely(buf))
198 kfree(buf);
199
200 }
201
ud_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)202 static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
203 int color, int bottom_only)
204 {
205 unsigned int cw = vc->vc_font.width;
206 unsigned int ch = vc->vc_font.height;
207 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
208 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
209 struct fb_fillrect region;
210
211 region.color = color;
212 region.rop = ROP_COPY;
213
214 if ((int) rw > 0 && !bottom_only) {
215 region.dy = 0;
216 region.dx = info->var.xoffset;
217 region.width = rw;
218 region.height = info->var.yres_virtual;
219 info->fbops->fb_fillrect(info, ®ion);
220 }
221
222 if ((int) bh > 0) {
223 region.dy = info->var.yoffset;
224 region.dx = info->var.xoffset;
225 region.height = bh;
226 region.width = info->var.xres;
227 info->fbops->fb_fillrect(info, ®ion);
228 }
229 }
230
ud_cursor(struct vc_data * vc,struct fb_info * info,int mode,int fg,int bg)231 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
232 int fg, int bg)
233 {
234 struct fb_cursor cursor;
235 struct fbcon_ops *ops = info->fbcon_par;
236 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
237 int w = (vc->vc_font.width + 7) >> 3, c;
238 int y = real_y(ops->p, vc->state.y);
239 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
240 int err = 1, dx, dy;
241 char *src;
242 u32 vyres = info->var.yres;
243 u32 vxres = info->var.xres;
244
245 if (!ops->fontbuffer)
246 return;
247
248 cursor.set = 0;
249
250 c = scr_readw((u16 *) vc->vc_pos);
251 attribute = get_attribute(info, c);
252 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
253
254 if (ops->cursor_state.image.data != src ||
255 ops->cursor_reset) {
256 ops->cursor_state.image.data = src;
257 cursor.set |= FB_CUR_SETIMAGE;
258 }
259
260 if (attribute) {
261 u8 *dst;
262
263 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
264 if (!dst)
265 return;
266 kfree(ops->cursor_data);
267 ops->cursor_data = dst;
268 ud_update_attr(dst, src, attribute, vc);
269 src = dst;
270 }
271
272 if (ops->cursor_state.image.fg_color != fg ||
273 ops->cursor_state.image.bg_color != bg ||
274 ops->cursor_reset) {
275 ops->cursor_state.image.fg_color = fg;
276 ops->cursor_state.image.bg_color = bg;
277 cursor.set |= FB_CUR_SETCMAP;
278 }
279
280 if (ops->cursor_state.image.height != vc->vc_font.height ||
281 ops->cursor_state.image.width != vc->vc_font.width ||
282 ops->cursor_reset) {
283 ops->cursor_state.image.height = vc->vc_font.height;
284 ops->cursor_state.image.width = vc->vc_font.width;
285 cursor.set |= FB_CUR_SETSIZE;
286 }
287
288 dy = vyres - ((y * vc->vc_font.height) + vc->vc_font.height);
289 dx = vxres - ((vc->state.x * vc->vc_font.width) + vc->vc_font.width);
290
291 if (ops->cursor_state.image.dx != dx ||
292 ops->cursor_state.image.dy != dy ||
293 ops->cursor_reset) {
294 ops->cursor_state.image.dx = dx;
295 ops->cursor_state.image.dy = dy;
296 cursor.set |= FB_CUR_SETPOS;
297 }
298
299 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
300 ops->cursor_reset) {
301 ops->cursor_state.hot.x = cursor.hot.y = 0;
302 cursor.set |= FB_CUR_SETHOT;
303 }
304
305 if (cursor.set & FB_CUR_SETSIZE ||
306 vc->vc_cursor_type != ops->p->cursor_shape ||
307 ops->cursor_state.mask == NULL ||
308 ops->cursor_reset) {
309 char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
310 int cur_height, size, i = 0;
311 u8 msk = 0xff;
312
313 if (!mask)
314 return;
315
316 kfree(ops->cursor_state.mask);
317 ops->cursor_state.mask = mask;
318
319 ops->p->cursor_shape = vc->vc_cursor_type;
320 cursor.set |= FB_CUR_SETSHAPE;
321
322 switch (CUR_SIZE(ops->p->cursor_shape)) {
323 case CUR_NONE:
324 cur_height = 0;
325 break;
326 case CUR_UNDERLINE:
327 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
328 break;
329 case CUR_LOWER_THIRD:
330 cur_height = vc->vc_font.height/3;
331 break;
332 case CUR_LOWER_HALF:
333 cur_height = vc->vc_font.height >> 1;
334 break;
335 case CUR_TWO_THIRDS:
336 cur_height = (vc->vc_font.height << 1)/3;
337 break;
338 case CUR_BLOCK:
339 default:
340 cur_height = vc->vc_font.height;
341 break;
342 }
343
344 size = cur_height * w;
345
346 while (size--)
347 mask[i++] = msk;
348
349 size = (vc->vc_font.height - cur_height) * w;
350
351 while (size--)
352 mask[i++] = ~msk;
353 }
354
355 switch (mode) {
356 case CM_ERASE:
357 ops->cursor_state.enable = 0;
358 break;
359 case CM_DRAW:
360 case CM_MOVE:
361 default:
362 ops->cursor_state.enable = (use_sw) ? 0 : 1;
363 break;
364 }
365
366 cursor.image.data = src;
367 cursor.image.fg_color = ops->cursor_state.image.fg_color;
368 cursor.image.bg_color = ops->cursor_state.image.bg_color;
369 cursor.image.dx = ops->cursor_state.image.dx;
370 cursor.image.dy = ops->cursor_state.image.dy;
371 cursor.image.height = ops->cursor_state.image.height;
372 cursor.image.width = ops->cursor_state.image.width;
373 cursor.hot.x = ops->cursor_state.hot.x;
374 cursor.hot.y = ops->cursor_state.hot.y;
375 cursor.mask = ops->cursor_state.mask;
376 cursor.enable = ops->cursor_state.enable;
377 cursor.image.depth = 1;
378 cursor.rop = ROP_XOR;
379
380 if (info->fbops->fb_cursor)
381 err = info->fbops->fb_cursor(info, &cursor);
382
383 if (err)
384 soft_cursor(info, &cursor);
385
386 ops->cursor_reset = 0;
387 }
388
ud_update_start(struct fb_info * info)389 static int ud_update_start(struct fb_info *info)
390 {
391 struct fbcon_ops *ops = info->fbcon_par;
392 int xoffset, yoffset;
393 u32 vyres = info->var.yres;
394 u32 vxres = info->var.xres;
395 int err;
396
397 xoffset = vxres - info->var.xres - ops->var.xoffset;
398 yoffset = vyres - info->var.yres - ops->var.yoffset;
399 if (yoffset < 0)
400 yoffset += vyres;
401 ops->var.xoffset = xoffset;
402 ops->var.yoffset = yoffset;
403 err = fb_pan_display(info, &ops->var);
404 ops->var.xoffset = info->var.xoffset;
405 ops->var.yoffset = info->var.yoffset;
406 ops->var.vmode = info->var.vmode;
407 return err;
408 }
409
fbcon_rotate_ud(struct fbcon_ops * ops)410 void fbcon_rotate_ud(struct fbcon_ops *ops)
411 {
412 ops->clear = ud_clear;
413 ops->putcs = ud_putcs;
414 ops->clear_margins = ud_clear_margins;
415 ops->cursor = ud_cursor;
416 ops->update_start = ud_update_start;
417 }
418