[linux.git] / drivers / video / atafb_iplan2p8.c

/*
 *  linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for
 *				      interleaved bitplanes à la Atari (8
 *				      planes, 2 bytes interleave)
 *
 *	Created 5 Apr 1997 by Geert Uytterhoeven
 *
 *  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.
 */

#include <linux/module.h>
#include <linux/string.h>
#include <linux/fb.h>

#include <asm/setup.h>

#include "atafb.h"

#define BPL	8
#include "atafb_utils.h"


/* Copies a 8 plane column from 's', height 'h', to 'd'. */

/* This expands a 8 bit color into two longs for two movepl (8 plane)
 * operations.
 */

void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line,
			     int sy, int sx, int dy, int dx,
			     int height, int width)
{
	/*  bmove() has to distinguish two major cases: If both, source and
	 *  destination, start at even addresses or both are at odd
	 *  addresses, just the first odd and last even column (if present)
	 *  require special treatment (memmove_col()). The rest between
	 *  then can be copied by normal operations, because all adjacent
	 *  bytes are affected and are to be stored in the same order.
	 *    The pathological case is when the move should go from an odd
	 *  address to an even or vice versa. Since the bytes in the plane
	 *  words must be assembled in new order, it seems wisest to make
	 *  all movements by memmove_col().
	 */

	u8 *src, *dst;
	u32 *s, *d;
	int w, l , i, j;
	u_int colsize;
	u_int upwards = (dy < sy) || (dy == sy && dx < sx);

	colsize = height;
	if (!((sx ^ dx) & 15)) {
		/* odd->odd or even->even */

		if (upwards) {
			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
			if (sx & 15) {
				memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
				src += BPL * 2;
				dst += BPL * 2;
				width -= 8;
			}
			w = width >> 4;
			if (w) {
				s = (u32 *)src;
				d = (u32 *)dst;
				w *= BPL / 2;
				l = next_line - w * 4;
				for (j = height; j > 0; j--) {
					for (i = w; i > 0; i--)
						*d++ = *s++;
					s = (u32 *)((u8 *)s + l);
					d = (u32 *)((u8 *)d + l);
				}
			}
			if (width & 15)
				memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
					      0xff00ff00, height, next_line - BPL * 2);
		} else {
			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);

			if ((sx + width) & 15) {
				src -= BPL * 2;
				dst -= BPL * 2;
				memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
				width -= 8;
			}
			w = width >> 4;
			if (w) {
				s = (u32 *)src;
				d = (u32 *)dst;
				w *= BPL / 2;
				l = next_line - w * 4;
				for (j = height; j > 0; j--) {
					for (i = w; i > 0; i--)
						*--d = *--s;
					s = (u32 *)((u8 *)s - l);
					d = (u32 *)((u8 *)d - l);
				}
			}
			if (sx & 15)
				memmove32_col(dst - (width - 16) / (8 / BPL),
					      src - (width - 16) / (8 / BPL),
					      0xff00ff, colsize, -next_line - BPL * 2);
		}
	} else {
		/* odd->even or even->odd */
		if (upwards) {
			u32 *src32, *dst32;
			u32 pval[4], v, v1, mask;
			int i, j, w, f;

			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);

			mask = 0xff00ff00;
			f = 0;
			w = width;
			if (sx & 15) {
				f = 1;
				w += 8;
			}
			if ((sx + width) & 15)
				f |= 2;
			w >>= 4;
			for (i = height; i; i--) {
				src32 = (u32 *)src;
				dst32 = (u32 *)dst;

				if (f & 1) {
					pval[0] = (*src32++ << 8) & mask;
					pval[1] = (*src32++ << 8) & mask;
					pval[2] = (*src32++ << 8) & mask;
					pval[3] = (*src32++ << 8) & mask;
				} else {
					pval[0] = dst32[0] & mask;
					pval[1] = dst32[1] & mask;
					pval[2] = dst32[2] & mask;
					pval[3] = dst32[3] & mask;
				}

				for (j = w; j > 0; j--) {
					v = *src32++;
					v1 = v & mask;
					*dst32++ = pval[0] | (v1 >> 8);
					pval[0] = (v ^ v1) << 8;
					v = *src32++;
					v1 = v & mask;
					*dst32++ = pval[1] | (v1 >> 8);
					pval[1] = (v ^ v1) << 8;
					v = *src32++;
					v1 = v & mask;
					*dst32++ = pval[2] | (v1 >> 8);
					pval[2] = (v ^ v1) << 8;
					v = *src32++;
					v1 = v & mask;
					*dst32++ = pval[3] | (v1 >> 8);
					pval[3] = (v ^ v1) << 8;
				}

				if (f & 2) {
					dst32[0] = (dst32[0] & mask) | pval[0];
					dst32[1] = (dst32[1] & mask) | pval[1];
					dst32[2] = (dst32[2] & mask) | pval[2];
					dst32[3] = (dst32[3] & mask) | pval[3];
				}

				src += next_line;
				dst += next_line;
			}
		} else {
			u32 *src32, *dst32;
			u32 pval[4], v, v1, mask;
			int i, j, w, f;

			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);

			mask = 0xff00ff;
			f = 0;
			w = width;
			if ((dx + width) & 15)
				f = 1;
			if (sx & 15) {
				f |= 2;
				w += 8;
			}
			w >>= 4;
			for (i = height; i; i--) {
				src32 = (u32 *)src;
				dst32 = (u32 *)dst;

				if (f & 1) {
					pval[0] = dst32[-1] & mask;
					pval[1] = dst32[-2] & mask;
					pval[2] = dst32[-3] & mask;
					pval[3] = dst32[-4] & mask;
				} else {
					pval[0] = (*--src32 >> 8) & mask;
					pval[1] = (*--src32 >> 8) & mask;
					pval[2] = (*--src32 >> 8) & mask;
					pval[3] = (*--src32 >> 8) & mask;
				}

				for (j = w; j > 0; j--) {
					v = *--src32;
					v1 = v & mask;
					*--dst32 = pval[0] | (v1 << 8);
					pval[0] = (v ^ v1) >> 8;
					v = *--src32;
					v1 = v & mask;
					*--dst32 = pval[1] | (v1 << 8);
					pval[1] = (v ^ v1) >> 8;
					v = *--src32;
					v1 = v & mask;
					*--dst32 = pval[2] | (v1 << 8);
					pval[2] = (v ^ v1) >> 8;
					v = *--src32;
					v1 = v & mask;
					*--dst32 = pval[3] | (v1 << 8);
					pval[3] = (v ^ v1) >> 8;
				}

				if (!(f & 2)) {
					dst32[-1] = (dst32[-1] & mask) | pval[0];
					dst32[-2] = (dst32[-2] & mask) | pval[1];
					dst32[-3] = (dst32[-3] & mask) | pval[2];
					dst32[-4] = (dst32[-4] & mask) | pval[3];
				}

				src -= next_line;
				dst -= next_line;
			}
		}
	}
}

void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,
                             int sy, int sx, int height, int width)
{
	u32 *dest;
	int rows, i;
	u32 cval[4];

	dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
	if (sx & 15) {
		u8 *dest8 = (u8 *)dest + 1;

		expand8_col2mask(color, cval);

		for (i = height; i; i--) {
			fill8_col(dest8, cval);
			dest8 += next_line;
		}
		dest += BPL / 2;
		width -= 8;
	}

	expand16_col2mask(color, cval);
	rows = width >> 4;
	if (rows) {
		u32 *d = dest;
		u32 off = next_line - rows * BPL * 2;
		for (i = height; i; i--) {
			d = fill16_col(d, rows, cval);
			d = (u32 *)((long)d + off);
		}
		dest += rows * BPL / 2;
		width &= 15;
	}

	if (width) {
		u8 *dest8 = (u8 *)dest;

		expand8_col2mask(color, cval);

		for (i = height; i; i--) {
			fill8_col(dest8, cval);
			dest8 += next_line;
		}
	}
}

void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line,
			     int dy, int dx, u32 width,
			     const u8 *data, u32 bgcolor, u32 fgcolor)
{
	u32 *dest;
	const u16 *data16;
	int rows;
	u32 fgm[4], bgm[4], m;

	dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
	if (dx & 15) {
		fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
		dest += BPL / 2;
		width -= 8;
	}

	if (width >= 16) {
		data16 = (const u16 *)data;
		expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);

		for (rows = width / 16; rows; rows--) {
			u16 d = *data16++;
			m = d | ((u32)d << 16);
			*dest++ = (m & fgm[0]) ^ bgm[0];
			*dest++ = (m & fgm[1]) ^ bgm[1];
			*dest++ = (m & fgm[2]) ^ bgm[2];
			*dest++ = (m & fgm[3]) ^ bgm[3];
		}

		data = (const u8 *)data16;
		width &= 15;
	}

	if (width)
		fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
}

#ifdef MODULE
MODULE_LICENSE("GPL");

int init_module(void)
{
	return 0;
}

void cleanup_module(void)
{
}
#endif /* MODULE */


    /*
     *  Visible symbols for modules
     */

EXPORT_SYMBOL(atafb_iplan2p8_copyarea);
EXPORT_SYMBOL(atafb_iplan2p8_fillrect);
EXPORT_SYMBOL(atafb_iplan2p8_linefill);
Commit	Line	Data
a1005012 MS	1	/*
	2	* linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for
	3	* interleaved bitplanes à la Atari (8
	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 8
	22	#include "atafb_utils.h"
	23
	24
	25	/* Copies a 8 plane column from 's', height 'h', to 'd'. */
	26
	27	/* This expands a 8 bit color into two longs for two movepl (8 plane)
	28	* operations.
	29	*/
	30
	31	void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line,
	32	int sy, int sx, int dy, int dx,
	33	int height, int width)
	34	{
	35	/* bmove() has to distinguish two major cases: If both, source and
	36	* destination, start at even addresses or both are at odd
	37	* addresses, just the first odd and last even column (if present)
	38	* require special treatment (memmove_col()). The rest between
	39	* then can be copied by normal operations, because all adjacent
	40	* bytes are affected and are to be stored in the same order.
	41	* The pathological case is when the move should go from an odd
	42	* address to an even or vice versa. Since the bytes in the plane
	43	* words must be assembled in new order, it seems wisest to make
	44	* all movements by memmove_col().
	45	*/
	46
	47	u8 src, dst;
	48	u32 s, d;
	49	int w, l , i, j;
	50	u_int colsize;
	51	u_int upwards = (dy < sy) \|\| (dy == sy && dx < sx);
	52
	53	colsize = height;
	54	if (!((sx ^ dx) & 15)) {
	55	/* odd->odd or even->even */
	56
	57	if (upwards) {
	58	src = (u8 )info->screen_base + sy next_line + (sx & ~15) / (8 / BPL);
	59	dst = (u8 )info->screen_base + dy next_line + (dx & ~15) / (8 / BPL);
	60	if (sx & 15) {
	61	memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
	62	src += BPL * 2;
	63	dst += BPL * 2;
	64	width -= 8;
65	}
66	w = width >> 4;
67	if (w) {
68	s = (u32 *)src;
69	d = (u32 *)dst;
70	w *= BPL / 2;
71	l = next_line - w * 4;
72	for (j = height; j > 0; j--) {
73	for (i = w; i > 0; i--)
74	d++ = s++;
75	s = (u32 )((u8 )s + l);
76	d = (u32 )((u8 )d + l);
77	}
78	}
79	if (width & 15)
80	memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
81	0xff00ff00, height, next_line - BPL * 2);
82	} else {
83	src = (u8 )info->screen_base + (sy - 1) next_line + ((sx + width + 8) & ~15) / (8 / BPL);
84	dst = (u8 )info->screen_base + (dy - 1) next_line + ((dx + width + 8) & ~15) / (8 / BPL);
85
86	if ((sx + width) & 15) {
87	src -= BPL * 2;
88	dst -= BPL * 2;
89	memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
90	width -= 8;
91	}
92	w = width >> 4;
93	if (w) {
94	s = (u32 *)src;
95	d = (u32 *)dst;
96	w *= BPL / 2;
97	l = next_line - w * 4;
98	for (j = height; j > 0; j--) {
99	for (i = w; i > 0; i--)
100	--d = --s;
101	s = (u32 )((u8 )s - l);
102	d = (u32 )((u8 )d - l);
103	}
104	}
105	if (sx & 15)
106	memmove32_col(dst - (width - 16) / (8 / BPL),
107	src - (width - 16) / (8 / BPL),
108	0xff00ff, colsize, -next_line - BPL * 2);
109	}
110	} else {
111	/* odd->even or even->odd */
112	if (upwards) {
113	u32 src32, dst32;
114	u32 pval[4], v, v1, mask;
115	int i, j, w, f;
116
117	src = (u8 )info->screen_base + sy next_line + (sx & ~15) / (8 / BPL);
118	dst = (u8 )info->screen_base + dy next_line + (dx & ~15) / (8 / BPL);
119
120	mask = 0xff00ff00;
121	f = 0;
122	w = width;
123	if (sx & 15) {
124	f = 1;
125	w += 8;
126	}
127	if ((sx + width) & 15)
128	f \|= 2;
129	w >>= 4;
130	for (i = height; i; i--) {
131	src32 = (u32 *)src;
132	dst32 = (u32 *)dst;
133
134	if (f & 1) {
135	pval[0] = (*src32++ << 8) & mask;
136	pval[1] = (*src32++ << 8) & mask;
137	pval[2] = (*src32++ << 8) & mask;
138	pval[3] = (*src32++ << 8) & mask;
139	} else {
140	pval[0] = dst32[0] & mask;
141	pval[1] = dst32[1] & mask;
142	pval[2] = dst32[2] & mask;
143	pval[3] = dst32[3] & mask;
144	}
145
146	for (j = w; j > 0; j--) {
147	v = *src32++;
148	v1 = v & mask;
149	*dst32++ = pval[0] \| (v1 >> 8);
150	pval[0] = (v ^ v1) << 8;
151	v = *src32++;
152	v1 = v & mask;
153	*dst32++ = pval[1] \| (v1 >> 8);
154	pval[1] = (v ^ v1) << 8;
155	v = *src32++;
156	v1 = v & mask;
157	*dst32++ = pval[2] \| (v1 >> 8);
158	pval[2] = (v ^ v1) << 8;
159	v = *src32++;
160	v1 = v & mask;
161	*dst32++ = pval[3] \| (v1 >> 8);
162	pval[3] = (v ^ v1) << 8;
163	}
164
165	if (f & 2) {
166	dst32[0] = (dst32[0] & mask) \| pval[0];
167	dst32[1] = (dst32[1] & mask) \| pval[1];
168	dst32[2] = (dst32[2] & mask) \| pval[2];
169	dst32[3] = (dst32[3] & mask) \| pval[3];
170	}
171
172	src += next_line;
173	dst += next_line;
174	}
175	} else {
176	u32 src32, dst32;
177	u32 pval[4], v, v1, mask;
178	int i, j, w, f;
179
180	src = (u8 )info->screen_base + (sy - 1) next_line + ((sx + width + 8) & ~15) / (8 / BPL);
181	dst = (u8 )info->screen_base + (dy - 1) next_line + ((dx + width + 8) & ~15) / (8 / BPL);
182
183	mask = 0xff00ff;
184	f = 0;
185	w = width;
186	if ((dx + width) & 15)
187	f = 1;
188	if (sx & 15) {
189	f \|= 2;
190	w += 8;
191	}
192	w >>= 4;
193	for (i = height; i; i--) {
194	src32 = (u32 *)src;
195	dst32 = (u32 *)dst;
196
197	if (f & 1) {
198	pval[0] = dst32[-1] & mask;
199	pval[1] = dst32[-2] & mask;
200	pval[2] = dst32[-3] & mask;
201	pval[3] = dst32[-4] & mask;
202	} else {
203	pval[0] = (*--src32 >> 8) & mask;
204	pval[1] = (*--src32 >> 8) & mask;
205	pval[2] = (*--src32 >> 8) & mask;
206	pval[3] = (*--src32 >> 8) & mask;
207	}
208
209	for (j = w; j > 0; j--) {
210	v = *--src32;
211	v1 = v & mask;
212	*--dst32 = pval[0] \| (v1 << 8);
213	pval[0] = (v ^ v1) >> 8;
214	v = *--src32;
215	v1 = v & mask;
216	*--dst32 = pval[1] \| (v1 << 8);
217	pval[1] = (v ^ v1) >> 8;
218	v = *--src32;
219	v1 = v & mask;
220	*--dst32 = pval[2] \| (v1 << 8);
221	pval[2] = (v ^ v1) >> 8;
222	v = *--src32;
223	v1 = v & mask;
224	*--dst32 = pval[3] \| (v1 << 8);
225	pval[3] = (v ^ v1) >> 8;
226	}
227
228	if (!(f & 2)) {
229	dst32[-1] = (dst32[-1] & mask) \| pval[0];
230	dst32[-2] = (dst32[-2] & mask) \| pval[1];
231	dst32[-3] = (dst32[-3] & mask) \| pval[2];
232	dst32[-4] = (dst32[-4] & mask) \| pval[3];
233	}
234
235	src -= next_line;
236	dst -= next_line;
237	}
238	}
239	}
240	}
241
242	void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,
243	int sy, int sx, int height, int width)
244	{
245	u32 *dest;
246	int rows, i;
247	u32 cval[4];
248
249	dest = (u32 )(info->screen_base + sy next_line + (sx & ~15) / (8 / BPL));
250	if (sx & 15) {
251	u8 dest8 = (u8 )dest + 1;
252
253	expand8_col2mask(color, cval);
254
255	for (i = height; i; i--) {
256	fill8_col(dest8, cval);
257	dest8 += next_line;
258	}
259	dest += BPL / 2;
260	width -= 8;
261	}
262
263	expand16_col2mask(color, cval);
264	rows = width >> 4;
265	if (rows) {
266	u32 *d = dest;
267	u32 off = next_line - rows * BPL * 2;
268	for (i = height; i; i--) {
269	d = fill16_col(d, rows, cval);
270	d = (u32 *)((long)d + off);
271	}
272	dest += rows * BPL / 2;
273	width &= 15;
274	}
275
276	if (width) {
277	u8 dest8 = (u8 )dest;
278
279	expand8_col2mask(color, cval);
280
281	for (i = height; i; i--) {
282	fill8_col(dest8, cval);
283	dest8 += next_line;
284	}
285	}
286	}
287
288	void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line,
289	int dy, int dx, u32 width,
290	const u8 *data, u32 bgcolor, u32 fgcolor)
291	{
292	u32 *dest;
293	const u16 *data16;
294	int rows;
295	u32 fgm[4], bgm[4], m;
296
297	dest = (u32 )(info->screen_base + dy next_line + (dx & ~15) / (8 / BPL));
298	if (dx & 15) {
299	fill8_2col((u8 )dest + 1, fgcolor, bgcolor, data++);
300	dest += BPL / 2;
301	width -= 8;
302	}
303
304	if (width >= 16) {
305	data16 = (const u16 *)data;
306	expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
307
308	for (rows = width / 16; rows; rows--) {
309	u16 d = *data16++;
310	m = d \| ((u32)d << 16);
311	*dest++ = (m & fgm[0]) ^ bgm[0];
312	*dest++ = (m & fgm[1]) ^ bgm[1];
313	*dest++ = (m & fgm[2]) ^ bgm[2];
314	*dest++ = (m & fgm[3]) ^ bgm[3];
315	}
316
317	data = (const u8 *)data16;
318	width &= 15;
319	}
320
321	if (width)
322	fill8_2col((u8 )dest, fgcolor, bgcolor, data);
323	}
324
325	#ifdef MODULE
326	MODULE_LICENSE("GPL");
327
328	int init_module(void)
329	{
330	return 0;
331	}
332
333	void cleanup_module(void)
334	{
335	}
336	#endif /* MODULE */
337
338
339	/*
340	* Visible symbols for modules
341	*/
342
343	EXPORT_SYMBOL(atafb_iplan2p8_copyarea);
344	EXPORT_SYMBOL(atafb_iplan2p8_fillrect);
345	EXPORT_SYMBOL(atafb_iplan2p8_linefill);