1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
|
/*
* Generic fillrect for frame buffers with packed pixels of any depth.
*
* Copyright (C) 2000 James Simmons (jsimmons@linux-fbdev.org)
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
* NOTES:
*
* The code for depths like 24 that don't have integer number of pixels per
* long is broken and needs to be fixed. For now I turned these types of
* mode off.
*
* Also need to add code to deal with cards endians that are different than
* the native cpu endians. I also need to deal with MSB position in the word.
*
*/
#include <linux/module.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <asm/types.h>
#include "fb_draw.h"
#if BITS_PER_LONG == 32
# define FB_WRITEL fb_writel
# define FB_READL fb_readl
#else
# define FB_WRITEL fb_writeq
# define FB_READL fb_readq
#endif
/*
* Aligned pattern fill using 32/64-bit memory accesses
*/
static void
bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
unsigned n, int bits, u32 bswapmask)
{
unsigned long first, last;
if (!n)
return;
first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
if (dst_idx+n <= bits) {
// Single word
if (last)
first &= last;
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
} else {
// Multiple destination words
// Leading bits
if (first!= ~0UL) {
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
dst++;
n -= bits - dst_idx;
}
// Main chunk
n /= bits;
while (n >= 8) {
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
FB_WRITEL(pat, dst++);
n -= 8;
}
while (n--)
FB_WRITEL(pat, dst++);
// Trailing bits
if (last)
FB_WRITEL(comp(pat, FB_READL(dst), last), dst);
}
}
/*
* Unaligned generic pattern fill using 32/64-bit memory accesses
* The pattern must have been expanded to a full 32/64-bit value
* Left/right are the appropriate shifts to convert to the pattern to be
* used for the next 32/64-bit word
*/
static void
bitfill_unaligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
int left, int right, unsigned n, int bits)
{
unsigned long first, last;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
// Single word
if (last)
first &= last;
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
} else {
// Multiple destination words
// Leading bits
if (first) {
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
dst++;
pat = pat << left | pat >> right;
n -= bits - dst_idx;
}
// Main chunk
n /= bits;
while (n >= 4) {
FB_WRITEL(pat, dst++);
pat = pat << left | pat >> right;
FB_WRITEL(pat, dst++);
pat = pat << left | pat >> right;
FB_WRITEL(pat, dst++);
pat = pat << left | pat >> right;
FB_WRITEL(pat, dst++);
pat = pat << left | pat >> right;
n -= 4;
}
while (n--) {
FB_WRITEL(pat, dst++);
pat = pat << left | pat >> right;
}
// Trailing bits
if (last)
FB_WRITEL(comp(pat, FB_READL(dst), first), dst);
}
}
/*
* Aligned pattern invert using 32/64-bit memory accesses
*/
static void
bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
unsigned n, int bits, u32 bswapmask)
{
unsigned long val = pat, dat;
unsigned long first, last;
if (!n)
return;
first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
if (dst_idx+n <= bits) {
// Single word
if (last)
first &= last;
dat = FB_READL(dst);
FB_WRITEL(comp(dat ^ val, dat, first), dst);
} else {
// Multiple destination words
// Leading bits
if (first!=0UL) {
dat = FB_READL(dst);
FB_WRITEL(comp(dat ^ val, dat, first), dst);
dst++;
n -= bits - dst_idx;
}
// Main chunk
n /= bits;
while (n >= 8) {
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
n -= 8;
}
while (n--) {
FB_WRITEL(FB_READL(dst) ^ val, dst);
dst++;
}
// Trailing bits
if (last) {
dat = FB_READL(dst);
FB_WRITEL(comp(dat ^ val, dat, last), dst);
}
}
}
/*
* Unaligned generic pattern invert using 32/64-bit memory accesses
* The pattern must have been expanded to a full 32/64-bit value
* Left/right are the appropriate shifts to convert to the pattern to be
* used for the next 32/64-bit word
*/
static void
bitfill_unaligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
int left, int right, unsigned n, int bits)
{
unsigned long first, last, dat;
if (!n)
return;
first = FB_SHIFT_HIGH(~0UL, dst_idx);
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
if (dst_idx+n <= bits) {
// Single word
if (last)
first &= last;
dat = FB_READL(dst);
FB_WRITEL(comp(dat ^ pat, dat, first), dst);
} else {
// Multiple destination words
// Leading bits
if (first != 0UL) {
dat = FB_READL(dst);
FB_WRITEL(comp(dat ^ pat, dat, first), dst);
dst++;
pat = pat << left | pat >> right;
n -= bits - dst_idx;
}
// Main chunk
n /= bits;
while (n >= 4) {
FB_WRITEL(FB_READL(dst) ^ pat, dst);
dst++;
pat = pat << left | pat >> right;
FB_WRITEL(FB_READL(dst) ^ pat, dst);
dst++;
pat = pat << left | pat >> right;
FB_WRITEL(FB_READL(dst) ^ pat, dst);
dst++;
pat = pat << left | pat >> right;
FB_WRITEL(FB_READL(dst) ^ pat, dst);
dst++;
pat = pat << left | pat >> right;
n -= 4;
}
while (n--) {
FB_WRITEL(FB_READL(dst) ^ pat, dst);
dst++;
pat = pat << left | pat >> right;
}
// Trailing bits
if (last) {
dat = FB_READL(dst);
FB_WRITEL(comp(dat ^ pat, dat, last), dst);
}
}
}
void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
{
unsigned long pat, fg;
unsigned long width = rect->width, height = rect->height;
int bits = BITS_PER_LONG, bytes = bits >> 3;
u32 bpp = p->var.bits_per_pixel;
unsigned long __iomem *dst;
int dst_idx, left;
if (p->state != FBINFO_STATE_RUNNING)
return;
if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
p->fix.visual == FB_VISUAL_DIRECTCOLOR )
fg = ((u32 *) (p->pseudo_palette))[rect->color];
else
fg = rect->color;
pat = pixel_to_pat( bpp, fg);
dst = (unsigned long __iomem *)((unsigned long)p->screen_base & ~(bytes-1));
dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8;
dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp;
/* FIXME For now we support 1-32 bpp only */
left = bits % bpp;
if (p->fbops->fb_sync)
p->fbops->fb_sync(p);
if (!left) {
u32 bswapmask = fb_compute_bswapmask(p);
void (*fill_op32)(unsigned long __iomem *dst, int dst_idx,
unsigned long pat, unsigned n, int bits,
u32 bswapmask) = NULL;
switch (rect->rop) {
case ROP_XOR:
fill_op32 = bitfill_aligned_rev;
break;
case ROP_COPY:
fill_op32 = bitfill_aligned;
break;
default:
printk( KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n");
fill_op32 = bitfill_aligned;
break;
}
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op32(dst, dst_idx, pat, width*bpp, bits, bswapmask);
dst_idx += p->fix.line_length*8;
}
} else {
int right;
int r;
int rot = (left-dst_idx) % bpp;
void (*fill_op)(unsigned long __iomem *dst, int dst_idx,
unsigned long pat, int left, int right,
unsigned n, int bits) = NULL;
/* rotate pattern to correct start position */
pat = pat << rot | pat >> (bpp-rot);
right = bpp-left;
switch (rect->rop) {
case ROP_XOR:
fill_op = bitfill_unaligned_rev;
break;
case ROP_COPY:
fill_op = bitfill_unaligned;
break;
default:
printk( KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n");
fill_op = bitfill_unaligned;
break;
}
while (height--) {
dst += dst_idx >> (ffs(bits) - 1);
dst_idx &= (bits - 1);
fill_op(dst, dst_idx, pat, left, right,
width*bpp, bits);
r = (p->fix.line_length*8) % bpp;
pat = pat << (bpp-r) | pat >> r;
dst_idx += p->fix.line_length*8;
}
}
}
EXPORT_SYMBOL(cfb_fillrect);
MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
MODULE_DESCRIPTION("Generic software accelerated fill rectangle");
MODULE_LICENSE("GPL");
|
