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