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1da177e4 LT |
1 | /* |
2 | * Generic fillrect for frame buffers with packed pixels of any depth. | |
3 | * | |
4 | * Copyright (C) 2000 James Simmons (jsimmons@linux-fbdev.org) | |
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 | * NOTES: | |
11 | * | |
12 | * The code for depths like 24 that don't have integer number of pixels per | |
13 | * long is broken and needs to be fixed. For now I turned these types of | |
14 | * mode off. | |
15 | * | |
16 | * Also need to add code to deal with cards endians that are different than | |
17 | * the native cpu endians. I also need to deal with MSB position in the word. | |
18 | * | |
19 | */ | |
1da177e4 LT |
20 | #include <linux/module.h> |
21 | #include <linux/string.h> | |
22 | #include <linux/fb.h> | |
23 | #include <asm/types.h> | |
dc0e6e05 | 24 | #include "fb_draw.h" |
1da177e4 LT |
25 | |
26 | #if BITS_PER_LONG == 32 | |
27 | # define FB_WRITEL fb_writel | |
28 | # define FB_READL fb_readl | |
29 | #else | |
30 | # define FB_WRITEL fb_writeq | |
31 | # define FB_READL fb_readq | |
1da177e4 LT |
32 | #endif |
33 | ||
34 | /* | |
35 | * Aligned pattern fill using 32/64-bit memory accesses | |
36 | */ | |
37 | ||
38 | static void | |
779121e9 PP |
39 | bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat, |
40 | unsigned n, int bits, u32 bswapmask) | |
1da177e4 LT |
41 | { |
42 | unsigned long first, last; | |
43 | ||
44 | if (!n) | |
45 | return; | |
46 | ||
779121e9 PP |
47 | first = fb_shifted_pixels_mask_long(dst_idx, bswapmask); |
48 | last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask); | |
1da177e4 LT |
49 | |
50 | if (dst_idx+n <= bits) { | |
51 | // Single word | |
52 | if (last) | |
53 | first &= last; | |
54 | FB_WRITEL(comp(pat, FB_READL(dst), first), dst); | |
55 | } else { | |
56 | // Multiple destination words | |
57 | ||
58 | // Leading bits | |
59 | if (first!= ~0UL) { | |
60 | FB_WRITEL(comp(pat, FB_READL(dst), first), dst); | |
61 | dst++; | |
62 | n -= bits - dst_idx; | |
63 | } | |
64 | ||
65 | // Main chunk | |
66 | n /= bits; | |
67 | while (n >= 8) { | |
68 | FB_WRITEL(pat, dst++); | |
69 | FB_WRITEL(pat, dst++); | |
70 | FB_WRITEL(pat, dst++); | |
71 | FB_WRITEL(pat, dst++); | |
72 | FB_WRITEL(pat, dst++); | |
73 | FB_WRITEL(pat, dst++); | |
74 | FB_WRITEL(pat, dst++); | |
75 | FB_WRITEL(pat, dst++); | |
76 | n -= 8; | |
77 | } | |
78 | while (n--) | |
79 | FB_WRITEL(pat, dst++); | |
80 | ||
81 | // Trailing bits | |
82 | if (last) | |
83 | FB_WRITEL(comp(pat, FB_READL(dst), last), dst); | |
84 | } | |
85 | } | |
86 | ||
87 | ||
88 | /* | |
89 | * Unaligned generic pattern fill using 32/64-bit memory accesses | |
90 | * The pattern must have been expanded to a full 32/64-bit value | |
91 | * Left/right are the appropriate shifts to convert to the pattern to be | |
92 | * used for the next 32/64-bit word | |
93 | */ | |
94 | ||
95 | static void | |
96 | bitfill_unaligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat, | |
97 | int left, int right, unsigned n, int bits) | |
98 | { | |
99 | unsigned long first, last; | |
100 | ||
101 | if (!n) | |
102 | return; | |
103 | ||
be0d9b6c AD |
104 | first = FB_SHIFT_HIGH(~0UL, dst_idx); |
105 | last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits)); | |
1da177e4 LT |
106 | |
107 | if (dst_idx+n <= bits) { | |
108 | // Single word | |
109 | if (last) | |
110 | first &= last; | |
111 | FB_WRITEL(comp(pat, FB_READL(dst), first), dst); | |
112 | } else { | |
113 | // Multiple destination words | |
114 | // Leading bits | |
115 | if (first) { | |
116 | FB_WRITEL(comp(pat, FB_READL(dst), first), dst); | |
117 | dst++; | |
118 | pat = pat << left | pat >> right; | |
119 | n -= bits - dst_idx; | |
120 | } | |
121 | ||
122 | // Main chunk | |
123 | n /= bits; | |
124 | while (n >= 4) { | |
125 | FB_WRITEL(pat, dst++); | |
126 | pat = pat << left | pat >> right; | |
127 | FB_WRITEL(pat, dst++); | |
128 | pat = pat << left | pat >> right; | |
129 | FB_WRITEL(pat, dst++); | |
130 | pat = pat << left | pat >> right; | |
131 | FB_WRITEL(pat, dst++); | |
132 | pat = pat << left | pat >> right; | |
133 | n -= 4; | |
134 | } | |
135 | while (n--) { | |
136 | FB_WRITEL(pat, dst++); | |
137 | pat = pat << left | pat >> right; | |
138 | } | |
139 | ||
140 | // Trailing bits | |
141 | if (last) | |
142 | FB_WRITEL(comp(pat, FB_READL(dst), first), dst); | |
143 | } | |
144 | } | |
145 | ||
146 | /* | |
147 | * Aligned pattern invert using 32/64-bit memory accesses | |
148 | */ | |
149 | static void | |
779121e9 PP |
150 | bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat, |
151 | unsigned n, int bits, u32 bswapmask) | |
1da177e4 LT |
152 | { |
153 | unsigned long val = pat, dat; | |
154 | unsigned long first, last; | |
155 | ||
156 | if (!n) | |
157 | return; | |
158 | ||
779121e9 PP |
159 | first = fb_shifted_pixels_mask_long(dst_idx, bswapmask); |
160 | last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask); | |
1da177e4 LT |
161 | |
162 | if (dst_idx+n <= bits) { | |
163 | // Single word | |
164 | if (last) | |
165 | first &= last; | |
166 | dat = FB_READL(dst); | |
167 | FB_WRITEL(comp(dat ^ val, dat, first), dst); | |
168 | } else { | |
169 | // Multiple destination words | |
170 | // Leading bits | |
171 | if (first!=0UL) { | |
172 | dat = FB_READL(dst); | |
173 | FB_WRITEL(comp(dat ^ val, dat, first), dst); | |
174 | dst++; | |
175 | n -= bits - dst_idx; | |
176 | } | |
177 | ||
178 | // Main chunk | |
179 | n /= bits; | |
180 | while (n >= 8) { | |
181 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
182 | dst++; | |
183 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
184 | dst++; | |
185 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
186 | dst++; | |
187 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
188 | dst++; | |
189 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
190 | dst++; | |
191 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
192 | dst++; | |
193 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
194 | dst++; | |
195 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
196 | dst++; | |
197 | n -= 8; | |
198 | } | |
199 | while (n--) { | |
200 | FB_WRITEL(FB_READL(dst) ^ val, dst); | |
201 | dst++; | |
202 | } | |
203 | // Trailing bits | |
204 | if (last) { | |
205 | dat = FB_READL(dst); | |
206 | FB_WRITEL(comp(dat ^ val, dat, last), dst); | |
207 | } | |
208 | } | |
209 | } | |
210 | ||
211 | ||
212 | /* | |
213 | * Unaligned generic pattern invert using 32/64-bit memory accesses | |
214 | * The pattern must have been expanded to a full 32/64-bit value | |
215 | * Left/right are the appropriate shifts to convert to the pattern to be | |
216 | * used for the next 32/64-bit word | |
217 | */ | |
218 | ||
219 | static void | |
220 | bitfill_unaligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat, | |
221 | int left, int right, unsigned n, int bits) | |
222 | { | |
223 | unsigned long first, last, dat; | |
224 | ||
225 | if (!n) | |
226 | return; | |
227 | ||
be0d9b6c AD |
228 | first = FB_SHIFT_HIGH(~0UL, dst_idx); |
229 | last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits)); | |
1da177e4 LT |
230 | |
231 | if (dst_idx+n <= bits) { | |
232 | // Single word | |
233 | if (last) | |
234 | first &= last; | |
235 | dat = FB_READL(dst); | |
236 | FB_WRITEL(comp(dat ^ pat, dat, first), dst); | |
237 | } else { | |
238 | // Multiple destination words | |
239 | ||
240 | // Leading bits | |
241 | if (first != 0UL) { | |
242 | dat = FB_READL(dst); | |
243 | FB_WRITEL(comp(dat ^ pat, dat, first), dst); | |
244 | dst++; | |
245 | pat = pat << left | pat >> right; | |
246 | n -= bits - dst_idx; | |
247 | } | |
248 | ||
249 | // Main chunk | |
250 | n /= bits; | |
251 | while (n >= 4) { | |
252 | FB_WRITEL(FB_READL(dst) ^ pat, dst); | |
253 | dst++; | |
254 | pat = pat << left | pat >> right; | |
255 | FB_WRITEL(FB_READL(dst) ^ pat, dst); | |
256 | dst++; | |
257 | pat = pat << left | pat >> right; | |
258 | FB_WRITEL(FB_READL(dst) ^ pat, dst); | |
259 | dst++; | |
260 | pat = pat << left | pat >> right; | |
261 | FB_WRITEL(FB_READL(dst) ^ pat, dst); | |
262 | dst++; | |
263 | pat = pat << left | pat >> right; | |
264 | n -= 4; | |
265 | } | |
266 | while (n--) { | |
267 | FB_WRITEL(FB_READL(dst) ^ pat, dst); | |
268 | dst++; | |
269 | pat = pat << left | pat >> right; | |
270 | } | |
271 | ||
272 | // Trailing bits | |
273 | if (last) { | |
274 | dat = FB_READL(dst); | |
275 | FB_WRITEL(comp(dat ^ pat, dat, last), dst); | |
276 | } | |
277 | } | |
278 | } | |
279 | ||
280 | void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect) | |
281 | { | |
b4d8aea6 AD |
282 | unsigned long pat, fg; |
283 | unsigned long width = rect->width, height = rect->height; | |
1da177e4 LT |
284 | int bits = BITS_PER_LONG, bytes = bits >> 3; |
285 | u32 bpp = p->var.bits_per_pixel; | |
286 | unsigned long __iomem *dst; | |
287 | int dst_idx, left; | |
288 | ||
289 | if (p->state != FBINFO_STATE_RUNNING) | |
290 | return; | |
291 | ||
1da177e4 LT |
292 | if (p->fix.visual == FB_VISUAL_TRUECOLOR || |
293 | p->fix.visual == FB_VISUAL_DIRECTCOLOR ) | |
294 | fg = ((u32 *) (p->pseudo_palette))[rect->color]; | |
295 | else | |
296 | fg = rect->color; | |
297 | ||
298 | pat = pixel_to_pat( bpp, fg); | |
299 | ||
300 | dst = (unsigned long __iomem *)((unsigned long)p->screen_base & ~(bytes-1)); | |
301 | dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8; | |
302 | dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp; | |
303 | /* FIXME For now we support 1-32 bpp only */ | |
304 | left = bits % bpp; | |
305 | if (p->fbops->fb_sync) | |
306 | p->fbops->fb_sync(p); | |
307 | if (!left) { | |
779121e9 | 308 | u32 bswapmask = fb_compute_bswapmask(p); |
1da177e4 | 309 | void (*fill_op32)(unsigned long __iomem *dst, int dst_idx, |
779121e9 PP |
310 | unsigned long pat, unsigned n, int bits, |
311 | u32 bswapmask) = NULL; | |
1da177e4 LT |
312 | |
313 | switch (rect->rop) { | |
314 | case ROP_XOR: | |
315 | fill_op32 = bitfill_aligned_rev; | |
316 | break; | |
317 | case ROP_COPY: | |
318 | fill_op32 = bitfill_aligned; | |
319 | break; | |
320 | default: | |
321 | printk( KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n"); | |
322 | fill_op32 = bitfill_aligned; | |
323 | break; | |
324 | } | |
325 | while (height--) { | |
326 | dst += dst_idx >> (ffs(bits) - 1); | |
327 | dst_idx &= (bits - 1); | |
779121e9 | 328 | fill_op32(dst, dst_idx, pat, width*bpp, bits, bswapmask); |
1da177e4 LT |
329 | dst_idx += p->fix.line_length*8; |
330 | } | |
331 | } else { | |
332 | int right; | |
333 | int r; | |
334 | int rot = (left-dst_idx) % bpp; | |
335 | void (*fill_op)(unsigned long __iomem *dst, int dst_idx, | |
336 | unsigned long pat, int left, int right, | |
337 | unsigned n, int bits) = NULL; | |
338 | ||
339 | /* rotate pattern to correct start position */ | |
340 | pat = pat << rot | pat >> (bpp-rot); | |
341 | ||
342 | right = bpp-left; | |
343 | switch (rect->rop) { | |
344 | case ROP_XOR: | |
345 | fill_op = bitfill_unaligned_rev; | |
346 | break; | |
347 | case ROP_COPY: | |
348 | fill_op = bitfill_unaligned; | |
349 | break; | |
350 | default: | |
351 | printk( KERN_ERR "cfb_fillrect(): unknown rop, defaulting to ROP_COPY\n"); | |
352 | fill_op = bitfill_unaligned; | |
353 | break; | |
354 | } | |
355 | while (height--) { | |
356 | dst += dst_idx >> (ffs(bits) - 1); | |
357 | dst_idx &= (bits - 1); | |
358 | fill_op(dst, dst_idx, pat, left, right, | |
359 | width*bpp, bits); | |
360 | r = (p->fix.line_length*8) % bpp; | |
361 | pat = pat << (bpp-r) | pat >> r; | |
362 | dst_idx += p->fix.line_length*8; | |
363 | } | |
364 | } | |
365 | } | |
366 | ||
367 | EXPORT_SYMBOL(cfb_fillrect); | |
368 | ||
369 | MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>"); | |
370 | MODULE_DESCRIPTION("Generic software accelerated fill rectangle"); | |
371 | MODULE_LICENSE("GPL"); |