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