aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/console/fbcon_ccw.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/console/fbcon_ccw.c')
-rw-r--r--drivers/video/console/fbcon_ccw.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon_ccw.c b/drivers/video/console/fbcon_ccw.c
new file mode 100644
index 000000000000..680aabab73c5
--- /dev/null
+++ b/drivers/video/console/fbcon_ccw.c
@@ -0,0 +1,428 @@
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/config.h>
12#include <linux/module.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
25static inline 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 set_bit(FBCON_BIT(7), (void *)&msk1);
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
63static 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 display *p = &fb_display[vc->vc_num];
67 struct fb_copyarea area;
68 u32 vyres = GETVYRES(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
80static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
81 int sx, int height, int width)
82{
83 struct display *p = &fb_display[vc->vc_num];
84 struct fb_fillrect region;
85 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
86 u32 vyres = GETVYRES(p->scrollmode, info);
87
88 region.color = attr_bgcol_ec(bgshift,vc);
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
98static 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
129static 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 display *p = &fb_display[vc->vc_num];
135 struct fbcon_ops *ops = info->fbcon_par;
136 u32 width = (vc->vc_font.height + 7)/8;
137 u32 cellsize = width * vc->vc_font.width;
138 u32 maxcnt = info->pixmap.size/cellsize;
139 u32 scan_align = info->pixmap.scan_align - 1;
140 u32 buf_align = info->pixmap.buf_align - 1;
141 u32 cnt, pitch, size;
142 u32 attribute = get_attribute(info, scr_readw(s));
143 u8 *dst, *buf = NULL;
144 u32 vyres = GETVYRES(p->scrollmode, info);
145
146 if (!ops->fontbuffer)
147 return;
148
149 image.fg_color = fg;
150 image.bg_color = bg;
151 image.dx = yy * vc->vc_font.height;
152 image.dy = vyres - ((xx + count) * vc->vc_font.width);
153 image.width = vc->vc_font.height;
154 image.depth = 1;
155
156 if (attribute) {
157 buf = kmalloc(cellsize, GFP_KERNEL);
158 if (!buf)
159 return;
160 }
161
162 s += count - 1;
163
164 while (count) {
165 if (count > maxcnt)
166 cnt = maxcnt;
167 else
168 cnt = count;
169
170 image.height = vc->vc_font.width * cnt;
171 pitch = ((image.width + 7) >> 3) + scan_align;
172 pitch &= ~scan_align;
173 size = pitch * image.height + buf_align;
174 size &= ~buf_align;
175 dst = fb_get_buffer_offset(info, &info->pixmap, size);
176 image.data = dst;
177 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
178 width, cellsize, &image, buf, dst);
179 image.dy += image.height;
180 count -= cnt;
181 s -= cnt;
182 }
183
184 /* buf is always NULL except when in monochrome mode, so in this case
185 it's a gain to check buf against NULL even though kfree() handles
186 NULL pointers just fine */
187 if (unlikely(buf))
188 kfree(buf);
189
190}
191
192static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
193 int bottom_only)
194{
195 unsigned int cw = vc->vc_font.width;
196 unsigned int ch = vc->vc_font.height;
197 unsigned int rw = info->var.yres - (vc->vc_cols*cw);
198 unsigned int bh = info->var.xres - (vc->vc_rows*ch);
199 unsigned int bs = vc->vc_rows*ch;
200 struct fb_fillrect region;
201 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
202
203 region.color = attr_bgcol_ec(bgshift,vc);
204 region.rop = ROP_COPY;
205
206 if (rw && !bottom_only) {
207 region.dx = 0;
208 region.dy = info->var.yoffset;
209 region.height = rw;
210 region.width = info->var.xres_virtual;
211 info->fbops->fb_fillrect(info, &region);
212 }
213
214 if (bh) {
215 region.dx = info->var.xoffset + bs;
216 region.dy = 0;
217 region.height = info->var.yres_virtual;
218 region.width = bh;
219 info->fbops->fb_fillrect(info, &region);
220 }
221}
222
223static void ccw_cursor(struct vc_data *vc, struct fb_info *info,
224 struct display *p, int mode, int softback_lines,
225 int fg, int bg)
226{
227 struct fb_cursor cursor;
228 struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
229 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
230 int w = (vc->vc_font.height + 7) >> 3, c;
231 int y = real_y(p, vc->vc_y);
232 int attribute, use_sw = (vc->vc_cursor_type & 0x10);
233 int err = 1, dx, dy;
234 char *src;
235 u32 vyres = GETVYRES(p->scrollmode, info);
236
237 if (!ops->fontbuffer)
238 return;
239
240 cursor.set = 0;
241
242 if (softback_lines) {
243 if (y + softback_lines >= vc->vc_rows) {
244 mode = CM_ERASE;
245 ops->cursor_flash = 0;
246 return;
247 } else
248 y += softback_lines;
249 }
250
251 c = scr_readw((u16 *) vc->vc_pos);
252 attribute = get_attribute(info, c);
253 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
254
255 if (ops->cursor_state.image.data != src ||
256 ops->cursor_reset) {
257 ops->cursor_state.image.data = src;
258 cursor.set |= FB_CUR_SETIMAGE;
259 }
260
261 if (attribute) {
262 u8 *dst;
263
264 dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
265 if (!dst)
266 return;
267 kfree(ops->cursor_data);
268 ops->cursor_data = dst;
269 ccw_update_attr(dst, src, attribute, vc);
270 src = dst;
271 }
272
273 if (ops->cursor_state.image.fg_color != fg ||
274 ops->cursor_state.image.bg_color != bg ||
275 ops->cursor_reset) {
276 ops->cursor_state.image.fg_color = fg;
277 ops->cursor_state.image.bg_color = bg;
278 cursor.set |= FB_CUR_SETCMAP;
279 }
280
281 if (ops->cursor_state.image.height != vc->vc_font.width ||
282 ops->cursor_state.image.width != vc->vc_font.height ||
283 ops->cursor_reset) {
284 ops->cursor_state.image.height = vc->vc_font.width;
285 ops->cursor_state.image.width = vc->vc_font.height;
286 cursor.set |= FB_CUR_SETSIZE;
287 }
288
289 dx = y * vc->vc_font.height;
290 dy = vyres - ((vc->vc_x + 1) * vc->vc_font.width);
291
292 if (ops->cursor_state.image.dx != dx ||
293 ops->cursor_state.image.dy != dy ||
294 ops->cursor_reset) {
295 ops->cursor_state.image.dx = dx;
296 ops->cursor_state.image.dy = dy;
297 cursor.set |= FB_CUR_SETPOS;
298 }
299
300 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
301 ops->cursor_reset) {
302 ops->cursor_state.hot.x = cursor.hot.y = 0;
303 cursor.set |= FB_CUR_SETHOT;
304 }
305
306 if (cursor.set & FB_CUR_SETSIZE ||
307 vc->vc_cursor_type != p->cursor_shape ||
308 ops->cursor_state.mask == NULL ||
309 ops->cursor_reset) {
310 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
311 int cur_height, size, i = 0;
312 int width = (vc->vc_font.width + 7)/8;
313
314 if (!mask)
315 return;
316
317 tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
318
319 if (!tmp) {
320 kfree(mask);
321 return;
322 }
323
324 kfree(ops->cursor_state.mask);
325 ops->cursor_state.mask = mask;
326
327 p->cursor_shape = vc->vc_cursor_type;
328 cursor.set |= FB_CUR_SETSHAPE;
329
330 switch (p->cursor_shape & CUR_HWMASK) {
331 case CUR_NONE:
332 cur_height = 0;
333 break;
334 case CUR_UNDERLINE:
335 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
336 break;
337 case CUR_LOWER_THIRD:
338 cur_height = vc->vc_font.height/3;
339 break;
340 case CUR_LOWER_HALF:
341 cur_height = vc->vc_font.height >> 1;
342 break;
343 case CUR_TWO_THIRDS:
344 cur_height = (vc->vc_font.height << 1)/3;
345 break;
346 case CUR_BLOCK:
347 default:
348 cur_height = vc->vc_font.height;
349 break;
350 }
351
352 size = (vc->vc_font.height - cur_height) * width;
353 while (size--)
354 tmp[i++] = 0;
355 size = cur_height * width;
356 while (size--)
357 tmp[i++] = 0xff;
358 memset(mask, 0, w * vc->vc_font.width);
359 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
360 kfree(tmp);
361 }
362
363 switch (mode) {
364 case CM_ERASE:
365 ops->cursor_state.enable = 0;
366 break;
367 case CM_DRAW:
368 case CM_MOVE:
369 default:
370 ops->cursor_state.enable = (use_sw) ? 0 : 1;
371 break;
372 }
373
374 cursor.image.data = src;
375 cursor.image.fg_color = ops->cursor_state.image.fg_color;
376 cursor.image.bg_color = ops->cursor_state.image.bg_color;
377 cursor.image.dx = ops->cursor_state.image.dx;
378 cursor.image.dy = ops->cursor_state.image.dy;
379 cursor.image.height = ops->cursor_state.image.height;
380 cursor.image.width = ops->cursor_state.image.width;
381 cursor.hot.x = ops->cursor_state.hot.x;
382 cursor.hot.y = ops->cursor_state.hot.y;
383 cursor.mask = ops->cursor_state.mask;
384 cursor.enable = ops->cursor_state.enable;
385 cursor.image.depth = 1;
386 cursor.rop = ROP_XOR;
387
388 if (info->fbops->fb_cursor)
389 err = info->fbops->fb_cursor(info, &cursor);
390
391 if (err)
392 soft_cursor(info, &cursor);
393
394 ops->cursor_reset = 0;
395}
396
397int ccw_update_start(struct fb_info *info)
398{
399 struct fbcon_ops *ops = info->fbcon_par;
400 struct display *p = &fb_display[ops->currcon];
401 u32 yoffset;
402 u32 vyres = GETVYRES(p->scrollmode, info);
403 int err;
404
405 yoffset = (vyres - info->var.yres) - ops->var.xoffset;
406 ops->var.xoffset = ops->var.yoffset;
407 ops->var.yoffset = yoffset;
408 err = fb_pan_display(info, &ops->var);
409 ops->var.xoffset = info->var.xoffset;
410 ops->var.yoffset = info->var.yoffset;
411 ops->var.vmode = info->var.vmode;
412 return err;
413}
414
415void fbcon_rotate_ccw(struct fbcon_ops *ops)
416{
417 ops->bmove = ccw_bmove;
418 ops->clear = ccw_clear;
419 ops->putcs = ccw_putcs;
420 ops->clear_margins = ccw_clear_margins;
421 ops->cursor = ccw_cursor;
422 ops->update_start = ccw_update_start;
423}
424EXPORT_SYMBOL(fbcon_rotate_ccw);
425
426MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
427MODULE_DESCRIPTION("Console Rotation (270 degrees) Support");
428MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-08 07:39:26 -0400