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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/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 90 degrees
24 */
25
26static void cw_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 u8 c, msk = ~(0xff >> offset);
32
33 for (i = 0; i < vc->vc_font.width; i++) {
34 for (j = 0; j < width; j++) {
35 c = *src;
36 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && !j)
37 c |= msk;
38 if (attribute & FBCON_ATTRIBUTE_BOLD && i)
39 c |= *(src-width);
40 if (attribute & FBCON_ATTRIBUTE_REVERSE)
41 c = ~c;
42 src++;
43 *dst++ = c;
44 }
45 }
46}
47
48
49static void cw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
50 int sx, int dy, int dx, int height, int width)
51{
52 struct fbcon_par *par = info->fbcon_par;
53 struct fb_copyarea area;
54 u32 vxres = GETVXRES(par->p, info);
55
56 area.sx = vxres - ((sy + height) * vc->vc_font.height);
57 area.sy = sx * vc->vc_font.width;
58 area.dx = vxres - ((dy + height) * vc->vc_font.height);
59 area.dy = dx * vc->vc_font.width;
60 area.width = height * vc->vc_font.height;
61 area.height = width * vc->vc_font.width;
62
63 info->fbops->fb_copyarea(info, &area);
64}
65
66static void cw_clear(struct vc_data *vc, struct fb_info *info, int sy,
67 int sx, int height, int width, int fg, int bg)
68{
69 struct fbcon_par *par = info->fbcon_par;
70 struct fb_fillrect region;
71 u32 vxres = GETVXRES(par->p, info);
72
73 region.color = bg;
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, &region);
81}
82
83static 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_par *par = info->fbcon_par;
89 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
90 u32 idx = font_glyph_pitch(vc->vc_font.height);
91 u8 *src;
92
93 while (cnt--) {
94 src = par->rotated.buf + (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
114static 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_par *par = info->fbcon_par;
120 u32 width = font_glyph_pitch(vc->vc_font.height);
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(par->p, info);
129
130 if (!par->rotated.buf)
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
174static 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, &region);
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, &region);
201 }
202}
203
204static void cw_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
205 int fg, int bg)
206{
207 struct fb_cursor cursor;
208 struct fbcon_par *par = info->fbcon_par;
209 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
210 int w = font_glyph_pitch(vc->vc_font.height);
211 int c;
212 int y = real_y(par->p, vc->state.y);
213 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
214 int err = 1, dx, dy;
215 char *src;
216 u32 vxres = GETVXRES(par->p, info);
217
218 if (!par->rotated.buf)
219 return;
220
221 cursor.set = 0;
222
223 c = scr_readw((u16 *) vc->vc_pos);
224 attribute = get_attribute(info, c);
225 src = par->rotated.buf + ((c & charmask) * (w * vc->vc_font.width));
226
227 if (par->cursor_state.image.data != src ||
228 par->cursor_reset) {
229 par->cursor_state.image.data = src;
230 cursor.set |= FB_CUR_SETIMAGE;
231 }
232
233 if (attribute) {
234 u8 *dst;
235
236 dst = kmalloc_array(w, vc->vc_font.width, GFP_ATOMIC);
237 if (!dst)
238 return;
239 kfree(par->cursor_data);
240 par->cursor_data = dst;
241 cw_update_attr(dst, src, attribute, vc);
242 src = dst;
243 }
244
245 if (par->cursor_state.image.fg_color != fg ||
246 par->cursor_state.image.bg_color != bg ||
247 par->cursor_reset) {
248 par->cursor_state.image.fg_color = fg;
249 par->cursor_state.image.bg_color = bg;
250 cursor.set |= FB_CUR_SETCMAP;
251 }
252
253 if (par->cursor_state.image.height != vc->vc_font.width ||
254 par->cursor_state.image.width != vc->vc_font.height ||
255 par->cursor_reset) {
256 par->cursor_state.image.height = vc->vc_font.width;
257 par->cursor_state.image.width = vc->vc_font.height;
258 cursor.set |= FB_CUR_SETSIZE;
259 }
260
261 dx = vxres - ((y * vc->vc_font.height) + vc->vc_font.height);
262 dy = vc->state.x * vc->vc_font.width;
263
264 if (par->cursor_state.image.dx != dx ||
265 par->cursor_state.image.dy != dy ||
266 par->cursor_reset) {
267 par->cursor_state.image.dx = dx;
268 par->cursor_state.image.dy = dy;
269 cursor.set |= FB_CUR_SETPOS;
270 }
271
272 if (par->cursor_state.hot.x || par->cursor_state.hot.y ||
273 par->cursor_reset) {
274 par->cursor_state.hot.x = cursor.hot.y = 0;
275 cursor.set |= FB_CUR_SETHOT;
276 }
277
278 if (cursor.set & FB_CUR_SETSIZE ||
279 vc->vc_cursor_type != par->p->cursor_shape ||
280 par->cursor_state.mask == NULL ||
281 par->cursor_reset) {
282 unsigned char *tmp, *mask;
283
284 tmp = kmalloc_array(vc->vc_font.height, vc_font_pitch(&vc->vc_font), GFP_ATOMIC);
285 if (!tmp)
286 return;
287 fbcon_fill_cursor_mask(par, vc, tmp);
288
289 mask = kmalloc_array(vc->vc_font.width, w, GFP_ATOMIC);
290 if (!mask) {
291 kfree(tmp);
292 return;
293 }
294 font_glyph_rotate_90(tmp, vc->vc_font.width, vc->vc_font.height, mask);
295 kfree(tmp);
296
297 kfree(par->cursor_state.mask);
298 par->cursor_state.mask = (const char *)mask;
299
300 par->p->cursor_shape = vc->vc_cursor_type;
301 cursor.set |= FB_CUR_SETSHAPE;
302 }
303
304 par->cursor_state.enable = enable && !use_sw;
305
306 cursor.image.data = src;
307 cursor.image.fg_color = par->cursor_state.image.fg_color;
308 cursor.image.bg_color = par->cursor_state.image.bg_color;
309 cursor.image.dx = par->cursor_state.image.dx;
310 cursor.image.dy = par->cursor_state.image.dy;
311 cursor.image.height = par->cursor_state.image.height;
312 cursor.image.width = par->cursor_state.image.width;
313 cursor.hot.x = par->cursor_state.hot.x;
314 cursor.hot.y = par->cursor_state.hot.y;
315 cursor.mask = par->cursor_state.mask;
316 cursor.enable = par->cursor_state.enable;
317 cursor.image.depth = 1;
318 cursor.rop = ROP_XOR;
319
320 if (info->fbops->fb_cursor)
321 err = info->fbops->fb_cursor(info, &cursor);
322
323 if (err)
324 soft_cursor(info, &cursor);
325
326 par->cursor_reset = 0;
327}
328
329static int cw_update_start(struct fb_info *info)
330{
331 struct fbcon_par *par = info->fbcon_par;
332 u32 vxres = GETVXRES(par->p, info);
333 u32 xoffset;
334 int err;
335
336 xoffset = vxres - (info->var.xres + par->var.yoffset);
337 par->var.yoffset = par->var.xoffset;
338 par->var.xoffset = xoffset;
339 err = fb_pan_display(info, &par->var);
340 par->var.xoffset = info->var.xoffset;
341 par->var.yoffset = info->var.yoffset;
342 par->var.vmode = info->var.vmode;
343 return err;
344}
345
346static const struct fbcon_bitops cw_fbcon_bitops = {
347 .bmove = cw_bmove,
348 .clear = cw_clear,
349 .putcs = cw_putcs,
350 .clear_margins = cw_clear_margins,
351 .cursor = cw_cursor,
352 .update_start = cw_update_start,
353 .rotate_font = fbcon_rotate_font,
354};
355
356void fbcon_set_bitops_cw(struct fbcon_par *par)
357{
358 par->bitops = &cw_fbcon_bitops;
359}