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/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 270 degrees
23 */
24
ccw_update_attr(u8 * dst,u8 * src,int attribute,struct vc_data * vc)25 static 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 msk1 |= 0x01;
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
ccw_bmove(struct vc_data * vc,struct fb_info * info,int sy,int sx,int dy,int dx,int height,int width)63 static 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 fbcon_ops *ops = info->fbcon_par;
67 struct fb_copyarea area;
68 u32 vyres = GETVYRES(ops->p, 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
ccw_clear(struct vc_data * vc,struct fb_info * info,int sy,int sx,int height,int width)80 static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
81 int sx, int height, int width)
82 {
83 struct fbcon_ops *ops = info->fbcon_par;
84 struct fb_fillrect region;
85 int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
86 u32 vyres = GETVYRES(ops->p, info);
87
88 region.color = attr_bgcol_ec(bgshift,vc,info);
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, ®ion);
96 }
97
ccw_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)98 static 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
ccw_putcs(struct vc_data * vc,struct fb_info * info,const unsigned short * s,int count,int yy,int xx,int fg,int bg)129 static 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 fbcon_ops *ops = info->fbcon_par;
135 u32 width = (vc->vc_font.height + 7)/8;
136 u32 cellsize = width * vc->vc_font.width;
137 u32 maxcnt = info->pixmap.size/cellsize;
138 u32 scan_align = info->pixmap.scan_align - 1;
139 u32 buf_align = info->pixmap.buf_align - 1;
140 u32 cnt, pitch, size;
141 u32 attribute = get_attribute(info, scr_readw(s));
142 u8 *dst, *buf = NULL;
143 u32 vyres = GETVYRES(ops->p, info);
144
145 if (!ops->fontbuffer)
146 return;
147
148 image.fg_color = fg;
149 image.bg_color = bg;
150 image.dx = yy * vc->vc_font.height;
151 image.dy = vyres - ((xx + count) * vc->vc_font.width);
152 image.width = vc->vc_font.height;
153 image.depth = 1;
154
155 if (attribute) {
156 buf = kmalloc(cellsize, GFP_KERNEL);
157 if (!buf)
158 return;
159 }
160
161 s += count - 1;
162
163 while (count) {
164 if (count > maxcnt)
165 cnt = maxcnt;
166 else
167 cnt = count;
168
169 image.height = vc->vc_font.width * cnt;
170 pitch = ((image.width + 7) >> 3) + scan_align;
171 pitch &= ~scan_align;
172 size = pitch * image.height + buf_align;
173 size &= ~buf_align;
174 dst = fb_get_buffer_offset(info, &info->pixmap, size);
175 image.data = dst;
176 ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
177 width, cellsize, &image, buf, dst);
178 image.dy += image.height;
179 count -= cnt;
180 s -= cnt;
181 }
182
183 /* buf is always NULL except when in monochrome mode, so in this case
184 it's a gain to check buf against NULL even though kfree() handles
185 NULL pointers just fine */
186 if (unlikely(buf))
187 kfree(buf);
188
189 }
190
ccw_clear_margins(struct vc_data * vc,struct fb_info * info,int color,int bottom_only)191 static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
192 int color, int bottom_only)
193 {
194 unsigned int cw = vc->vc_font.width;
195 unsigned int ch = vc->vc_font.height;
196 unsigned int rw = info->var.yres - (vc->vc_cols*cw);
197 unsigned int bh = info->var.xres - (vc->vc_rows*ch);
198 unsigned int bs = vc->vc_rows*ch;
199 struct fb_fillrect region;
200
201 region.color = color;
202 region.rop = ROP_COPY;
203
204 if ((int) rw > 0 && !bottom_only) {
205 region.dx = 0;
206 region.dy = info->var.yoffset;
207 region.height = rw;
208 region.width = info->var.xres_virtual;
209 info->fbops->fb_fillrect(info, ®ion);
210 }
211
212 if ((int) bh > 0) {
213 region.dx = info->var.xoffset + bs;
214 region.dy = 0;
215 region.height = info->var.yres_virtual;
216 region.width = bh;
217 info->fbops->fb_fillrect(info, ®ion);
218 }
219 }
220
ccw_cursor(struct vc_data * vc,struct fb_info * info,bool enable,int fg,int bg)221 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
222 int fg, int bg)
223 {
224 struct fb_cursor cursor;
225 struct fbcon_ops *ops = info->fbcon_par;
226 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
227 int w = (vc->vc_font.height + 7) >> 3, c;
228 int y = real_y(ops->p, vc->state.y);
229 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
230 int err = 1, dx, dy;
231 char *src;
232 u32 vyres = GETVYRES(ops->p, info);
233
234 if (!ops->fontbuffer)
235 return;
236
237 cursor.set = 0;
238
239 c = scr_readw((u16 *) vc->vc_pos);
240 attribute = get_attribute(info, c);
241 src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
242
243 if (ops->cursor_state.image.data != src ||
244 ops->cursor_reset) {
245 ops->cursor_state.image.data = src;
246 cursor.set |= FB_CUR_SETIMAGE;
247 }
248
249 if (attribute) {
250 u8 *dst;
251
252 dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC);
253 if (!dst)
254 return;
255 kfree(ops->cursor_data);
256 ops->cursor_data = dst;
257 ccw_update_attr(dst, src, attribute, vc);
258 src = dst;
259 }
260
261 if (ops->cursor_state.image.fg_color != fg ||
262 ops->cursor_state.image.bg_color != bg ||
263 ops->cursor_reset) {
264 ops->cursor_state.image.fg_color = fg;
265 ops->cursor_state.image.bg_color = bg;
266 cursor.set |= FB_CUR_SETCMAP;
267 }
268
269 if (ops->cursor_state.image.height != vc->vc_font.width ||
270 ops->cursor_state.image.width != vc->vc_font.height ||
271 ops->cursor_reset) {
272 ops->cursor_state.image.height = vc->vc_font.width;
273 ops->cursor_state.image.width = vc->vc_font.height;
274 cursor.set |= FB_CUR_SETSIZE;
275 }
276
277 dx = y * vc->vc_font.height;
278 dy = vyres - ((vc->state.x + 1) * vc->vc_font.width);
279
280 if (ops->cursor_state.image.dx != dx ||
281 ops->cursor_state.image.dy != dy ||
282 ops->cursor_reset) {
283 ops->cursor_state.image.dx = dx;
284 ops->cursor_state.image.dy = dy;
285 cursor.set |= FB_CUR_SETPOS;
286 }
287
288 if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
289 ops->cursor_reset) {
290 ops->cursor_state.hot.x = cursor.hot.y = 0;
291 cursor.set |= FB_CUR_SETHOT;
292 }
293
294 if (cursor.set & FB_CUR_SETSIZE ||
295 vc->vc_cursor_type != ops->p->cursor_shape ||
296 ops->cursor_state.mask == NULL ||
297 ops->cursor_reset) {
298 char *tmp, *mask = kmalloc_array(w, vc->vc_font.width,
299 GFP_ATOMIC);
300 int cur_height, size, i = 0;
301 int width = (vc->vc_font.width + 7)/8;
302
303 if (!mask)
304 return;
305
306 tmp = kmalloc_array(width, vc->vc_font.height, GFP_ATOMIC);
307
308 if (!tmp) {
309 kfree(mask);
310 return;
311 }
312
313 kfree(ops->cursor_state.mask);
314 ops->cursor_state.mask = mask;
315
316 ops->p->cursor_shape = vc->vc_cursor_type;
317 cursor.set |= FB_CUR_SETSHAPE;
318
319 switch (CUR_SIZE(ops->p->cursor_shape)) {
320 case CUR_NONE:
321 cur_height = 0;
322 break;
323 case CUR_UNDERLINE:
324 cur_height = (vc->vc_font.height < 10) ? 1 : 2;
325 break;
326 case CUR_LOWER_THIRD:
327 cur_height = vc->vc_font.height/3;
328 break;
329 case CUR_LOWER_HALF:
330 cur_height = vc->vc_font.height >> 1;
331 break;
332 case CUR_TWO_THIRDS:
333 cur_height = (vc->vc_font.height << 1)/3;
334 break;
335 case CUR_BLOCK:
336 default:
337 cur_height = vc->vc_font.height;
338 break;
339 }
340
341 size = (vc->vc_font.height - cur_height) * width;
342 while (size--)
343 tmp[i++] = 0;
344 size = cur_height * width;
345 while (size--)
346 tmp[i++] = 0xff;
347 memset(mask, 0, w * vc->vc_font.width);
348 rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
349 kfree(tmp);
350 }
351
352 ops->cursor_state.enable = enable && !use_sw;
353
354 cursor.image.data = src;
355 cursor.image.fg_color = ops->cursor_state.image.fg_color;
356 cursor.image.bg_color = ops->cursor_state.image.bg_color;
357 cursor.image.dx = ops->cursor_state.image.dx;
358 cursor.image.dy = ops->cursor_state.image.dy;
359 cursor.image.height = ops->cursor_state.image.height;
360 cursor.image.width = ops->cursor_state.image.width;
361 cursor.hot.x = ops->cursor_state.hot.x;
362 cursor.hot.y = ops->cursor_state.hot.y;
363 cursor.mask = ops->cursor_state.mask;
364 cursor.enable = ops->cursor_state.enable;
365 cursor.image.depth = 1;
366 cursor.rop = ROP_XOR;
367
368 if (info->fbops->fb_cursor)
369 err = info->fbops->fb_cursor(info, &cursor);
370
371 if (err)
372 soft_cursor(info, &cursor);
373
374 ops->cursor_reset = 0;
375 }
376
ccw_update_start(struct fb_info * info)377 static int ccw_update_start(struct fb_info *info)
378 {
379 struct fbcon_ops *ops = info->fbcon_par;
380 u32 yoffset;
381 u32 vyres = GETVYRES(ops->p, info);
382 int err;
383
384 yoffset = (vyres - info->var.yres) - ops->var.xoffset;
385 ops->var.xoffset = ops->var.yoffset;
386 ops->var.yoffset = yoffset;
387 err = fb_pan_display(info, &ops->var);
388 ops->var.xoffset = info->var.xoffset;
389 ops->var.yoffset = info->var.yoffset;
390 ops->var.vmode = info->var.vmode;
391 return err;
392 }
393
fbcon_rotate_ccw(struct fbcon_ops * ops)394 void fbcon_rotate_ccw(struct fbcon_ops *ops)
395 {
396 ops->bmove = ccw_bmove;
397 ops->clear = ccw_clear;
398 ops->putcs = ccw_putcs;
399 ops->clear_margins = ccw_clear_margins;
400 ops->cursor = ccw_cursor;
401 ops->update_start = ccw_update_start;
402 }
403