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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/font.h>
16#include <linux/vt_kern.h>
17#include <linux/console.h>
18#include <asm/types.h>
19#include "fbcon.h"
20#include "fbcon_rotate.h"
21
22/*
23 * Rotation 270 degrees
24 */
25
26static void ccw_update_attr(u8 *dst, u8 *src, int attribute,
27 struct vc_data *vc)
28{
29 int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
30 int width = font_glyph_pitch(vc->vc_font.height);
31 int mod = vc->vc_font.height % 8;
32 u8 c, msk = ~(0xff << offset), msk1 = 0;
33
34 if (mod)
35 msk <<= (8 - mod);
36
37 if (offset > mod)
38 msk1 |= 0x01;
39
40 for (i = 0; i < vc->vc_font.width; i++) {
41 for (j = 0; j < width; j++) {
42 c = *src;
43
44 if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
45 if (j == width - 1)
46 c |= msk;
47
48 if (msk1 && j == width - 2)
49 c |= msk1;
50 }
51
52 if (attribute & FBCON_ATTRIBUTE_BOLD && i)
53 *(dst - width) |= c;
54
55 if (attribute & FBCON_ATTRIBUTE_REVERSE)
56 c = ~c;
57 src++;
58 *dst++ = c;
59 }
60 }
61}
62
63
64static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
65 int sx, int dy, int dx, int height, int width)
66{
67 struct fbcon_par *par = info->fbcon_par;
68 struct fb_copyarea area;
69 u32 vyres = GETVYRES(par->p, info);
70
71 area.sx = sy * vc->vc_font.height;
72 area.sy = vyres - ((sx + width) * vc->vc_font.width);
73 area.dx = dy * vc->vc_font.height;
74 area.dy = vyres - ((dx + width) * vc->vc_font.width);
75 area.width = height * vc->vc_font.height;
76 area.height = width * vc->vc_font.width;
77
78 info->fbops->fb_copyarea(info, &area);
79}
80
81static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
82 int sx, int height, int width, int fg, int bg)
83{
84 struct fbcon_par *par = info->fbcon_par;
85 struct fb_fillrect region;
86 u32 vyres = GETVYRES(par->p, info);
87
88 region.color = bg;
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_par *par = info->fbcon_par;
104 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
105 u32 idx = font_glyph_pitch(vc->vc_font.height);
106 u8 *src;
107
108 while (cnt--) {
109 src = par->rotated.buf + (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 fbcon_par *par = info->fbcon_par;
135 u32 width = font_glyph_pitch(vc->vc_font.height);
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(par->p, info);
144
145 if (!par->rotated.buf)
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
191static 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, &region);
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, &region);
218 }
219}
220
221static 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_par *par = info->fbcon_par;
226 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
227 int w = font_glyph_pitch(vc->vc_font.height);
228 int c;
229 int y = real_y(par->p, vc->state.y);
230 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
231 int err = 1, dx, dy;
232 char *src;
233 u32 vyres = GETVYRES(par->p, info);
234
235 if (!par->rotated.buf)
236 return;
237
238 cursor.set = 0;
239
240 c = scr_readw((u16 *) vc->vc_pos);
241 attribute = get_attribute(info, c);
242 src = par->rotated.buf + ((c & charmask) * (w * vc->vc_font.width));
243
244 if (par->cursor_state.image.data != src ||
245 par->cursor_reset) {
246 par->cursor_state.image.data = src;
247 cursor.set |= FB_CUR_SETIMAGE;
248 }
249
250 if (attribute) {
251 u8 *dst;
252
253 dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC);
254 if (!dst)
255 return;
256 kfree(par->cursor_data);
257 par->cursor_data = dst;
258 ccw_update_attr(dst, src, attribute, vc);
259 src = dst;
260 }
261
262 if (par->cursor_state.image.fg_color != fg ||
263 par->cursor_state.image.bg_color != bg ||
264 par->cursor_reset) {
265 par->cursor_state.image.fg_color = fg;
266 par->cursor_state.image.bg_color = bg;
267 cursor.set |= FB_CUR_SETCMAP;
268 }
269
270 if (par->cursor_state.image.height != vc->vc_font.width ||
271 par->cursor_state.image.width != vc->vc_font.height ||
272 par->cursor_reset) {
273 par->cursor_state.image.height = vc->vc_font.width;
274 par->cursor_state.image.width = vc->vc_font.height;
275 cursor.set |= FB_CUR_SETSIZE;
276 }
277
278 dx = y * vc->vc_font.height;
279 dy = vyres - ((vc->state.x + 1) * vc->vc_font.width);
280
281 if (par->cursor_state.image.dx != dx ||
282 par->cursor_state.image.dy != dy ||
283 par->cursor_reset) {
284 par->cursor_state.image.dx = dx;
285 par->cursor_state.image.dy = dy;
286 cursor.set |= FB_CUR_SETPOS;
287 }
288
289 if (par->cursor_state.hot.x || par->cursor_state.hot.y ||
290 par->cursor_reset) {
291 par->cursor_state.hot.x = cursor.hot.y = 0;
292 cursor.set |= FB_CUR_SETHOT;
293 }
294
295 if (cursor.set & FB_CUR_SETSIZE ||
296 vc->vc_cursor_type != par->p->cursor_shape ||
297 par->cursor_state.mask == NULL ||
298 par->cursor_reset) {
299 unsigned char *tmp, *mask;
300
301 tmp = kmalloc_array(vc->vc_font.height, vc_font_pitch(&vc->vc_font), GFP_ATOMIC);
302 if (!tmp)
303 return;
304 fbcon_fill_cursor_mask(par, vc, tmp);
305
306 mask = kmalloc_array(vc->vc_font.width, w, GFP_ATOMIC);
307 if (!mask) {
308 kfree(tmp);
309 return;
310 }
311 font_glyph_rotate_270(tmp, vc->vc_font.width, vc->vc_font.height, mask);
312 kfree(tmp);
313
314 kfree(par->cursor_state.mask);
315 par->cursor_state.mask = (const char *)mask;
316
317 par->p->cursor_shape = vc->vc_cursor_type;
318 cursor.set |= FB_CUR_SETSHAPE;
319 }
320
321 par->cursor_state.enable = enable && !use_sw;
322
323 cursor.image.data = src;
324 cursor.image.fg_color = par->cursor_state.image.fg_color;
325 cursor.image.bg_color = par->cursor_state.image.bg_color;
326 cursor.image.dx = par->cursor_state.image.dx;
327 cursor.image.dy = par->cursor_state.image.dy;
328 cursor.image.height = par->cursor_state.image.height;
329 cursor.image.width = par->cursor_state.image.width;
330 cursor.hot.x = par->cursor_state.hot.x;
331 cursor.hot.y = par->cursor_state.hot.y;
332 cursor.mask = par->cursor_state.mask;
333 cursor.enable = par->cursor_state.enable;
334 cursor.image.depth = 1;
335 cursor.rop = ROP_XOR;
336
337 if (info->fbops->fb_cursor)
338 err = info->fbops->fb_cursor(info, &cursor);
339
340 if (err)
341 soft_cursor(info, &cursor);
342
343 par->cursor_reset = 0;
344}
345
346static int ccw_update_start(struct fb_info *info)
347{
348 struct fbcon_par *par = info->fbcon_par;
349 u32 yoffset;
350 u32 vyres = GETVYRES(par->p, info);
351 int err;
352
353 yoffset = (vyres - info->var.yres) - par->var.xoffset;
354 par->var.xoffset = par->var.yoffset;
355 par->var.yoffset = yoffset;
356 err = fb_pan_display(info, &par->var);
357 par->var.xoffset = info->var.xoffset;
358 par->var.yoffset = info->var.yoffset;
359 par->var.vmode = info->var.vmode;
360 return err;
361}
362
363static const struct fbcon_bitops ccw_fbcon_bitops = {
364 .bmove = ccw_bmove,
365 .clear = ccw_clear,
366 .putcs = ccw_putcs,
367 .clear_margins = ccw_clear_margins,
368 .cursor = ccw_cursor,
369 .update_start = ccw_update_start,
370 .rotate_font = fbcon_rotate_font,
371};
372
373void fbcon_set_bitops_ccw(struct fbcon_par *par)
374{
375 par->bitops = &ccw_fbcon_bitops;
376}