media: ov5640: Add Omnivision OV5640 support
[linux-2.6.git] / drivers / video / atafb_iplan2p2.c
1 /*
2  *  linux/drivers/video/iplan2p2.c -- Low level frame buffer operations for
3  *                                    interleaved bitplanes à la Atari (2
4  *                                    planes, 2 bytes interleave)
5  *
6  *      Created 5 Apr 1997 by Geert Uytterhoeven
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/string.h>
15 #include <linux/fb.h>
16
17 #include <asm/setup.h>
18
19 #include "atafb.h"
20
21 #define BPL     2
22 #include "atafb_utils.h"
23
24 void atafb_iplan2p2_copyarea(struct fb_info *info, u_long next_line,
25                              int sy, int sx, int dy, int dx,
26                              int height, int width)
27 {
28         /*  bmove() has to distinguish two major cases: If both, source and
29          *  destination, start at even addresses or both are at odd
30          *  addresses, just the first odd and last even column (if present)
31          *  require special treatment (memmove_col()). The rest between
32          *  then can be copied by normal operations, because all adjacent
33          *  bytes are affected and are to be stored in the same order.
34          *    The pathological case is when the move should go from an odd
35          *  address to an even or vice versa. Since the bytes in the plane
36          *  words must be assembled in new order, it seems wisest to make
37          *  all movements by memmove_col().
38          */
39
40         u8 *src, *dst;
41         u32 *s, *d;
42         int w, l , i, j;
43         u_int colsize;
44         u_int upwards = (dy < sy) || (dy == sy && dx < sx);
45
46         colsize = height;
47         if (!((sx ^ dx) & 15)) {
48                 /* odd->odd or even->even */
49
50                 if (upwards) {
51                         src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
52                         dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
53                         if (sx & 15) {
54                                 memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
55                                 src += BPL * 2;
56                                 dst += BPL * 2;
57                                 width -= 8;
58                         }
59                         w = width >> 4;
60                         if (w) {
61                                 s = (u32 *)src;
62                                 d = (u32 *)dst;
63                                 w *= BPL / 2;
64                                 l = next_line - w * 4;
65                                 for (j = height; j > 0; j--) {
66                                         for (i = w; i > 0; i--)
67                                                 *d++ = *s++;
68                                         s = (u32 *)((u8 *)s + l);
69                                         d = (u32 *)((u8 *)d + l);
70                                 }
71                         }
72                         if (width & 15)
73                                 memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
74                                               0xff00ff00, height, next_line - BPL * 2);
75                 } else {
76                         src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
77                         dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
78
79                         if ((sx + width) & 15) {
80                                 src -= BPL * 2;
81                                 dst -= BPL * 2;
82                                 memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
83                                 width -= 8;
84                         }
85                         w = width >> 4;
86                         if (w) {
87                                 s = (u32 *)src;
88                                 d = (u32 *)dst;
89                                 w *= BPL / 2;
90                                 l = next_line - w * 4;
91                                 for (j = height; j > 0; j--) {
92                                         for (i = w; i > 0; i--)
93                                                 *--d = *--s;
94                                         s = (u32 *)((u8 *)s - l);
95                                         d = (u32 *)((u8 *)d - l);
96                                 }
97                         }
98                         if (sx & 15)
99                                 memmove32_col(dst - (width - 16) / (8 / BPL),
100                                               src - (width - 16) / (8 / BPL),
101                                               0xff00ff, colsize, -next_line - BPL * 2);
102                 }
103         } else {
104                 /* odd->even or even->odd */
105                 if (upwards) {
106                         u32 *src32, *dst32;
107                         u32 pval[4], v, v1, mask;
108                         int i, j, w, f;
109
110                         src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
111                         dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
112
113                         mask = 0xff00ff00;
114                         f = 0;
115                         w = width;
116                         if (sx & 15) {
117                                 f = 1;
118                                 w += 8;
119                         }
120                         if ((sx + width) & 15)
121                                 f |= 2;
122                         w >>= 4;
123                         for (i = height; i; i--) {
124                                 src32 = (u32 *)src;
125                                 dst32 = (u32 *)dst;
126
127                                 if (f & 1) {
128                                         pval[0] = (*src32++ << 8) & mask;
129                                 } else {
130                                         pval[0] = dst32[0] & mask;
131                                 }
132
133                                 for (j = w; j > 0; j--) {
134                                         v = *src32++;
135                                         v1 = v & mask;
136                                         *dst32++ = pval[0] | (v1 >> 8);
137                                         pval[0] = (v ^ v1) << 8;
138                                 }
139
140                                 if (f & 2) {
141                                         dst32[0] = (dst32[0] & mask) | pval[0];
142                                 }
143
144                                 src += next_line;
145                                 dst += next_line;
146                         }
147                 } else {
148                         u32 *src32, *dst32;
149                         u32 pval[4], v, v1, mask;
150                         int i, j, w, f;
151
152                         src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
153                         dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
154
155                         mask = 0xff00ff;
156                         f = 0;
157                         w = width;
158                         if ((dx + width) & 15)
159                                 f = 1;
160                         if (sx & 15) {
161                                 f |= 2;
162                                 w += 8;
163                         }
164                         w >>= 4;
165                         for (i = height; i; i--) {
166                                 src32 = (u32 *)src;
167                                 dst32 = (u32 *)dst;
168
169                                 if (f & 1) {
170                                         pval[0] = dst32[-1] & mask;
171                                 } else {
172                                         pval[0] = (*--src32 >> 8) & mask;
173                                 }
174
175                                 for (j = w; j > 0; j--) {
176                                         v = *--src32;
177                                         v1 = v & mask;
178                                         *--dst32 = pval[0] | (v1 << 8);
179                                         pval[0] = (v ^ v1) >> 8;
180                                 }
181
182                                 if (!(f & 2)) {
183                                         dst32[-1] = (dst32[-1] & mask) | pval[0];
184                                 }
185
186                                 src -= next_line;
187                                 dst -= next_line;
188                         }
189                 }
190         }
191 }
192
193 void atafb_iplan2p2_fillrect(struct fb_info *info, u_long next_line, u32 color,
194                              int sy, int sx, int height, int width)
195 {
196         u32 *dest;
197         int rows, i;
198         u32 cval[4];
199
200         dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
201         if (sx & 15) {
202                 u8 *dest8 = (u8 *)dest + 1;
203
204                 expand8_col2mask(color, cval);
205
206                 for (i = height; i; i--) {
207                         fill8_col(dest8, cval);
208                         dest8 += next_line;
209                 }
210                 dest += BPL / 2;
211                 width -= 8;
212         }
213
214         expand16_col2mask(color, cval);
215         rows = width >> 4;
216         if (rows) {
217                 u32 *d = dest;
218                 u32 off = next_line - rows * BPL * 2;
219                 for (i = height; i; i--) {
220                         d = fill16_col(d, rows, cval);
221                         d = (u32 *)((long)d + off);
222                 }
223                 dest += rows * BPL / 2;
224                 width &= 15;
225         }
226
227         if (width) {
228                 u8 *dest8 = (u8 *)dest;
229
230                 expand8_col2mask(color, cval);
231
232                 for (i = height; i; i--) {
233                         fill8_col(dest8, cval);
234                         dest8 += next_line;
235                 }
236         }
237 }
238
239 void atafb_iplan2p2_linefill(struct fb_info *info, u_long next_line,
240                              int dy, int dx, u32 width,
241                              const u8 *data, u32 bgcolor, u32 fgcolor)
242 {
243         u32 *dest;
244         const u16 *data16;
245         int rows;
246         u32 fgm[4], bgm[4], m;
247
248         dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
249         if (dx & 15) {
250                 fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
251                 dest += BPL / 2;
252                 width -= 8;
253         }
254
255         if (width >= 16) {
256                 data16 = (const u16 *)data;
257                 expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
258
259                 for (rows = width / 16; rows; rows--) {
260                         u16 d = *data16++;
261                         m = d | ((u32)d << 16);
262                         *dest++ = (m & fgm[0]) ^ bgm[0];
263                 }
264
265                 data = (const u8 *)data16;
266                 width &= 15;
267         }
268
269         if (width)
270                 fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
271 }
272
273 #ifdef MODULE
274 MODULE_LICENSE("GPL");
275
276 int init_module(void)
277 {
278         return 0;
279 }
280
281 void cleanup_module(void)
282 {
283 }
284 #endif /* MODULE */
285
286
287     /*
288      *  Visible symbols for modules
289      */
290
291 EXPORT_SYMBOL(atafb_iplan2p2_copyarea);
292 EXPORT_SYMBOL(atafb_iplan2p2_fillrect);
293 EXPORT_SYMBOL(atafb_iplan2p2_linefill);