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1/*
2 * linux/drivers/video/console/bitblit.c -- BitBlitting Operation
3 *
4 * Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
5 *
6 * Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive for
10 * more details.
11 */
12
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/string.h>
16#include <linux/fb.h>
17#include <linux/vt_kern.h>
18#include <linux/console.h>
19#include <asm/types.h>
20#include "fbcon.h"
21
22/*
23 * Accelerated handlers.
24 */
25static void update_attr(u8 *dst, const u8 *src, int attribute, struct vc_data *vc)
26{
27 int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
28 int width = DIV_ROUND_UP(vc->vc_font.width, 8);
29 unsigned int cellsize = vc->vc_font.height * width;
30 u8 c;
31
32 offset = cellsize - (offset * width);
33 for (i = 0; i < cellsize; i++) {
34 c = src[i];
35 if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
36 c = 0xff;
37 if (attribute & FBCON_ATTRIBUTE_BOLD)
38 c |= c >> 1;
39 if (attribute & FBCON_ATTRIBUTE_REVERSE)
40 c = ~c;
41 dst[i] = c;
42 }
43}
44
45static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
46 int sx, int dy, int dx, int height, int width)
47{
48 struct fb_copyarea area;
49
50 area.sx = sx * vc->vc_font.width;
51 area.sy = sy * vc->vc_font.height;
52 area.dx = dx * vc->vc_font.width;
53 area.dy = dy * vc->vc_font.height;
54 area.height = height * vc->vc_font.height;
55 area.width = width * vc->vc_font.width;
56
57 info->fbops->fb_copyarea(info, &area);
58}
59
60static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
61 int sx, int height, int width, int fg, int bg)
62{
63 struct fb_fillrect region;
64
65 region.color = bg;
66 region.dx = sx * vc->vc_font.width;
67 region.dy = sy * vc->vc_font.height;
68 region.width = width * vc->vc_font.width;
69 region.height = height * vc->vc_font.height;
70 region.rop = ROP_COPY;
71
72 info->fbops->fb_fillrect(info, &region);
73}
74
75static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
76 const u16 *s, u32 attr, u32 cnt,
77 u32 d_pitch, u32 s_pitch, u32 cellsize,
78 struct fb_image *image, u8 *buf, u8 *dst)
79{
80 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
81 unsigned int charcnt = vc->vc_font.charcount;
82 u32 idx = vc->vc_font.width >> 3;
83 const u8 *src;
84
85 while (cnt--) {
86 u16 ch = scr_readw(s++) & charmask;
87
88 if (ch >= charcnt)
89 ch = 0;
90 src = vc->vc_font.data + (unsigned int)ch * cellsize;
91
92 if (attr) {
93 update_attr(buf, src, attr, vc);
94 src = buf;
95 }
96
97 if (likely(idx == 1))
98 __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
99 image->height);
100 else
101 fb_pad_aligned_buffer(dst, d_pitch, src, idx,
102 image->height);
103
104 dst += s_pitch;
105 }
106
107 info->fbops->fb_imageblit(info, image);
108}
109
110static inline void bit_putcs_unaligned(struct vc_data *vc,
111 struct fb_info *info, const u16 *s,
112 u32 attr, u32 cnt, u32 d_pitch,
113 u32 s_pitch, u32 cellsize,
114 struct fb_image *image, u8 *buf,
115 u8 *dst)
116{
117 u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
118 unsigned int charcnt = vc->vc_font.charcount;
119 u32 shift_low = 0, mod = vc->vc_font.width % 8;
120 u32 shift_high = 8;
121 u32 idx = vc->vc_font.width >> 3;
122 const u8 *src;
123
124 while (cnt--) {
125 u16 ch = scr_readw(s++) & charmask;
126
127 if (ch >= charcnt)
128 ch = 0;
129 src = vc->vc_font.data + (unsigned int)ch * cellsize;
130
131 if (attr) {
132 update_attr(buf, src, attr, vc);
133 src = buf;
134 }
135
136 fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
137 image->height, shift_high,
138 shift_low, mod);
139 shift_low += mod;
140 dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
141 shift_low &= 7;
142 shift_high = 8 - shift_low;
143 }
144
145 info->fbops->fb_imageblit(info, image);
146
147}
148
149static void bit_putcs(struct vc_data *vc, struct fb_info *info,
150 const unsigned short *s, int count, int yy, int xx,
151 int fg, int bg)
152{
153 struct fb_image image;
154 u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
155 u32 cellsize = width * vc->vc_font.height;
156 u32 maxcnt = info->pixmap.size/cellsize;
157 u32 scan_align = info->pixmap.scan_align - 1;
158 u32 buf_align = info->pixmap.buf_align - 1;
159 u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
160 u32 attribute = get_attribute(info, scr_readw(s));
161 u8 *dst, *buf = NULL;
162
163 image.fg_color = fg;
164 image.bg_color = bg;
165 image.dx = xx * vc->vc_font.width;
166 image.dy = yy * vc->vc_font.height;
167 image.height = vc->vc_font.height;
168 image.depth = 1;
169
170 if (image.dy >= info->var.yres)
171 return;
172
173 image.height = min(image.height, info->var.yres - image.dy);
174
175 if (attribute) {
176 buf = kmalloc(cellsize, GFP_ATOMIC);
177 if (!buf)
178 return;
179 }
180
181 while (count) {
182 if (count > maxcnt)
183 cnt = maxcnt;
184 else
185 cnt = count;
186
187 image.width = vc->vc_font.width * cnt;
188
189 if (image.dx >= info->var.xres)
190 break;
191
192 if (image.dx + image.width > info->var.xres) {
193 image.width = info->var.xres - image.dx;
194 cnt = image.width / vc->vc_font.width;
195 if (cnt == 0)
196 break;
197 image.width = cnt * vc->vc_font.width;
198 }
199
200 pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
201 pitch &= ~scan_align;
202 size = pitch * image.height + buf_align;
203 size &= ~buf_align;
204 dst = fb_get_buffer_offset(info, &info->pixmap, size);
205 image.data = dst;
206
207 if (!mod)
208 bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
209 width, cellsize, &image, buf, dst);
210 else
211 bit_putcs_unaligned(vc, info, s, attribute, cnt,
212 pitch, width, cellsize, &image,
213 buf, dst);
214
215 image.dx += cnt * vc->vc_font.width;
216 count -= cnt;
217 s += cnt;
218 }
219
220 /* buf is always NULL except when in monochrome mode, so in this case
221 it's a gain to check buf against NULL even though kfree() handles
222 NULL pointers just fine */
223 if (unlikely(buf))
224 kfree(buf);
225
226}
227
228static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
229 int color, int bottom_only)
230{
231 unsigned int cw = vc->vc_font.width;
232 unsigned int ch = vc->vc_font.height;
233 unsigned int rw = info->var.xres - (vc->vc_cols*cw);
234 unsigned int bh = info->var.yres - (vc->vc_rows*ch);
235 unsigned int rs = info->var.xres - rw;
236 unsigned int bs = info->var.yres - bh;
237 struct fb_fillrect region;
238
239 region.color = color;
240 region.rop = ROP_COPY;
241
242 if ((int) rw > 0 && !bottom_only) {
243 region.dx = info->var.xoffset + rs;
244 region.dy = 0;
245 region.width = rw;
246 region.height = info->var.yres_virtual;
247 info->fbops->fb_fillrect(info, &region);
248 }
249
250 if ((int) bh > 0) {
251 region.dx = info->var.xoffset;
252 region.dy = info->var.yoffset + bs;
253 region.width = rs;
254 region.height = bh;
255 info->fbops->fb_fillrect(info, &region);
256 }
257}
258
259static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
260 int fg, int bg)
261{
262 struct fb_cursor cursor;
263 struct fbcon_par *par = info->fbcon_par;
264 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
265 int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
266 int y = real_y(par->p, vc->state.y);
267 int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
268 int err = 1;
269 const u8 *src;
270
271 cursor.set = 0;
272
273 if (!vc->vc_font.data)
274 return;
275
276 c = scr_readw((u16 *) vc->vc_pos);
277 attribute = get_attribute(info, c);
278 c &= charmask;
279
280 /* Clamp to font size, same as bit_putcs_aligned() */
281 if (c >= vc->vc_font.charcount)
282 c = 0;
283 src = vc->vc_font.data + (c * (w * vc->vc_font.height));
284
285 if (par->cursor_state.image.data != (const char *)src ||
286 par->cursor_reset) {
287 par->cursor_state.image.data = src;
288 cursor.set |= FB_CUR_SETIMAGE;
289 }
290
291 if (attribute) {
292 u8 *dst;
293
294 dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
295 if (!dst)
296 return;
297 kfree(par->cursor_data);
298 par->cursor_data = dst;
299 update_attr(dst, src, attribute, vc);
300 src = dst;
301 }
302
303 if (par->cursor_state.image.fg_color != fg ||
304 par->cursor_state.image.bg_color != bg ||
305 par->cursor_reset) {
306 par->cursor_state.image.fg_color = fg;
307 par->cursor_state.image.bg_color = bg;
308 cursor.set |= FB_CUR_SETCMAP;
309 }
310
311 if ((par->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||
312 (par->cursor_state.image.dy != (vc->vc_font.height * y)) ||
313 par->cursor_reset) {
314 par->cursor_state.image.dx = vc->vc_font.width * vc->state.x;
315 par->cursor_state.image.dy = vc->vc_font.height * y;
316 cursor.set |= FB_CUR_SETPOS;
317 }
318
319 if (par->cursor_state.image.height != vc->vc_font.height ||
320 par->cursor_state.image.width != vc->vc_font.width ||
321 par->cursor_reset) {
322 par->cursor_state.image.height = vc->vc_font.height;
323 par->cursor_state.image.width = vc->vc_font.width;
324 cursor.set |= FB_CUR_SETSIZE;
325 }
326
327 if (par->cursor_state.hot.x || par->cursor_state.hot.y ||
328 par->cursor_reset) {
329 par->cursor_state.hot.x = cursor.hot.y = 0;
330 cursor.set |= FB_CUR_SETHOT;
331 }
332
333 if (cursor.set & FB_CUR_SETSIZE ||
334 vc->vc_cursor_type != par->p->cursor_shape ||
335 par->cursor_state.mask == NULL ||
336 par->cursor_reset) {
337 unsigned char *mask = kmalloc_array(vc->vc_font.height, w, GFP_ATOMIC);
338
339 if (!mask)
340 return;
341 fbcon_fill_cursor_mask(par, vc, mask);
342
343 kfree(par->cursor_state.mask);
344 par->cursor_state.mask = (const char *)mask;
345
346 par->p->cursor_shape = vc->vc_cursor_type;
347 cursor.set |= FB_CUR_SETSHAPE;
348 }
349
350 par->cursor_state.enable = enable && !use_sw;
351
352 cursor.image.data = src;
353 cursor.image.fg_color = par->cursor_state.image.fg_color;
354 cursor.image.bg_color = par->cursor_state.image.bg_color;
355 cursor.image.dx = par->cursor_state.image.dx;
356 cursor.image.dy = par->cursor_state.image.dy;
357 cursor.image.height = par->cursor_state.image.height;
358 cursor.image.width = par->cursor_state.image.width;
359 cursor.hot.x = par->cursor_state.hot.x;
360 cursor.hot.y = par->cursor_state.hot.y;
361 cursor.mask = par->cursor_state.mask;
362 cursor.enable = par->cursor_state.enable;
363 cursor.image.depth = 1;
364 cursor.rop = ROP_XOR;
365
366 if (info->fbops->fb_cursor)
367 err = info->fbops->fb_cursor(info, &cursor);
368
369 if (err)
370 soft_cursor(info, &cursor);
371
372 par->cursor_reset = 0;
373}
374
375static int bit_update_start(struct fb_info *info)
376{
377 struct fbcon_par *par = info->fbcon_par;
378 int err;
379
380 err = fb_pan_display(info, &par->var);
381 par->var.xoffset = info->var.xoffset;
382 par->var.yoffset = info->var.yoffset;
383 par->var.vmode = info->var.vmode;
384 return err;
385}
386
387static const struct fbcon_bitops bit_fbcon_bitops = {
388 .bmove = bit_bmove,
389 .clear = bit_clear,
390 .putcs = bit_putcs,
391 .clear_margins = bit_clear_margins,
392 .cursor = bit_cursor,
393 .update_start = bit_update_start,
394};
395
396void fbcon_set_bitops_ur(struct fbcon_par *par)
397{
398 par->bitops = &bit_fbcon_bitops;
399}