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/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 90 degrees
23 */
24
cw_update_attr(u8 * dst,u8 * src,int attribute,struct vc_data * vc)25 static 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
cw_bmove(struct vc_data * vc,struct fb_info * info,int sy,int sx,int dy,int dx,int height,int width)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
cw_clear(struct vc_data * vc,struct fb_info * info,int sy,int sx,int height,int width)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,info);
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, ®ion);
82 }
83
cw_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)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
cw_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)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
cw_clear_margins(struct vc_data * vc,struct fb_info * info,int bottom_only)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,info);
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, ®ion);
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, ®ion);
203 }
204 }
205
cw_cursor(struct vc_data * vc,struct fb_info * info,int mode,int softback_lines,int fg,int bg)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
cw_update_start(struct fb_info * info)379 static 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
fbcon_rotate_cw(struct fbcon_ops * ops)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");
410