[linux.git] / drivers / video / atafb_iplan2p4.c

/*
 *  linux/drivers/video/iplan2p4.c -- Low level frame buffer operations for
 *				      interleaved bitplanes à la Atari (4
 *				      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	4
#include "atafb_utils.h"

void atafb_iplan2p4_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;
				} else {
					pval[0] = dst32[0] & mask;
					pval[1] = dst32[1] & 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;
				}

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

				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;
				} else {
					pval[0] = (*--src32 >> 8) & mask;
					pval[1] = (*--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;
				}

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

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

void atafb_iplan2p4_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_iplan2p4_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];
		}

		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_iplan2p4_copyarea);
EXPORT_SYMBOL(atafb_iplan2p4_fillrect);
EXPORT_SYMBOL(atafb_iplan2p4_linefill);
Commit	Line	Data
a1005012 MS	1	/*
	2	* linux/drivers/video/iplan2p4.c -- Low level frame buffer operations for
	3	* interleaved bitplanes à la Atari (4
	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 4
	22	#include "atafb_utils.h"
	23
	24	void atafb_iplan2p4_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	pval[1] = (*src32++ << 8) & mask;
130	} else {
131	pval[0] = dst32[0] & mask;
132	pval[1] = dst32[1] & mask;
133	}
134
135	for (j = w; j > 0; j--) {
136	v = *src32++;
137	v1 = v & mask;
138	*dst32++ = pval[0] \| (v1 >> 8);
139	pval[0] = (v ^ v1) << 8;
140	v = *src32++;
141	v1 = v & mask;
142	*dst32++ = pval[1] \| (v1 >> 8);
143	pval[1] = (v ^ v1) << 8;
144	}
145
146	if (f & 2) {
147	dst32[0] = (dst32[0] & mask) \| pval[0];
148	dst32[1] = (dst32[1] & mask) \| pval[1];
149	}
150
151	src += next_line;
152	dst += next_line;
153	}
154	} else {
155	u32 src32, dst32;
156	u32 pval[4], v, v1, mask;
157	int i, j, w, f;
158
159	src = (u8 )info->screen_base + (sy - 1) next_line + ((sx + width + 8) & ~15) / (8 / BPL);
160	dst = (u8 )info->screen_base + (dy - 1) next_line + ((dx + width + 8) & ~15) / (8 / BPL);
161
162	mask = 0xff00ff;
163	f = 0;
164	w = width;
165	if ((dx + width) & 15)
166	f = 1;
167	if (sx & 15) {
168	f \|= 2;
169	w += 8;
170	}
171	w >>= 4;
172	for (i = height; i; i--) {
173	src32 = (u32 *)src;
174	dst32 = (u32 *)dst;
175
176	if (f & 1) {
177	pval[0] = dst32[-1] & mask;
178	pval[1] = dst32[-2] & mask;
179	} else {
180	pval[0] = (*--src32 >> 8) & mask;
181	pval[1] = (*--src32 >> 8) & mask;
182	}
183
184	for (j = w; j > 0; j--) {
185	v = *--src32;
186	v1 = v & mask;
187	*--dst32 = pval[0] \| (v1 << 8);
188	pval[0] = (v ^ v1) >> 8;
189	v = *--src32;
190	v1 = v & mask;
191	*--dst32 = pval[1] \| (v1 << 8);
192	pval[1] = (v ^ v1) >> 8;
193	}
194
195	if (!(f & 2)) {
196	dst32[-1] = (dst32[-1] & mask) \| pval[0];
197	dst32[-2] = (dst32[-2] & mask) \| pval[1];
198	}
199
200	src -= next_line;
201	dst -= next_line;
202	}
203	}
204	}
205	}
206
207	void atafb_iplan2p4_fillrect(struct fb_info *info, u_long next_line, u32 color,
208	int sy, int sx, int height, int width)
209	{
210	u32 *dest;
211	int rows, i;
212	u32 cval[4];
213
214	dest = (u32 )(info->screen_base + sy next_line + (sx & ~15) / (8 / BPL));
215	if (sx & 15) {
216	u8 dest8 = (u8 )dest + 1;
217
218	expand8_col2mask(color, cval);
219
220	for (i = height; i; i--) {
221	fill8_col(dest8, cval);
222	dest8 += next_line;
223	}
224	dest += BPL / 2;
225	width -= 8;
226	}
227
228	expand16_col2mask(color, cval);
229	rows = width >> 4;
230	if (rows) {
231	u32 *d = dest;
232	u32 off = next_line - rows * BPL * 2;
233	for (i = height; i; i--) {
234	d = fill16_col(d, rows, cval);
235	d = (u32 *)((long)d + off);
236	}
237	dest += rows * BPL / 2;
238	width &= 15;
239	}
240
241	if (width) {
242	u8 dest8 = (u8 )dest;
243
244	expand8_col2mask(color, cval);
245
246	for (i = height; i; i--) {
247	fill8_col(dest8, cval);
248	dest8 += next_line;
249	}
250	}
251	}
252
253	void atafb_iplan2p4_linefill(struct fb_info *info, u_long next_line,
254	int dy, int dx, u32 width,
255	const u8 *data, u32 bgcolor, u32 fgcolor)
256	{
257	u32 *dest;
258	const u16 *data16;
259	int rows;
260	u32 fgm[4], bgm[4], m;
261
262	dest = (u32 )(info->screen_base + dy next_line + (dx & ~15) / (8 / BPL));
263	if (dx & 15) {
264	fill8_2col((u8 )dest + 1, fgcolor, bgcolor, data++);
265	dest += BPL / 2;
266	width -= 8;
267	}
268
269	if (width >= 16) {
270	data16 = (const u16 *)data;
271	expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
272
273	for (rows = width / 16; rows; rows--) {
274	u16 d = *data16++;
275	m = d \| ((u32)d << 16);
276	*dest++ = (m & fgm[0]) ^ bgm[0];
277	*dest++ = (m & fgm[1]) ^ bgm[1];
278	}
279
280	data = (const u8 *)data16;
281	width &= 15;
282	}
283
284	if (width)
285	fill8_2col((u8 )dest, fgcolor, bgcolor, data);
286	}
287
288	#ifdef MODULE
289	MODULE_LICENSE("GPL");
290
291	int init_module(void)
292	{
293	return 0;
294	}
295
296	void cleanup_module(void)
297	{
298	}
299	#endif /* MODULE */
300
301
302	/*
303	* Visible symbols for modules
304	*/
305
306	EXPORT_SYMBOL(atafb_iplan2p4_copyarea);
307	EXPORT_SYMBOL(atafb_iplan2p4_fillrect);
308	EXPORT_SYMBOL(atafb_iplan2p4_linefill);