1/*
2 *  linux/drivers/video/console/fbcon_ud.c -- Software Rotation - 90 degrees
3 *
4 *      Copyright (C) 2005 Antonino Daplas <adaplas @pol.net>
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
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/string.h>
14#include <linux/fb.h>
15#include <linux/vt_kern.h>
16#include <linux/console.h>
17#include <asm/types.h>
18#include "fbcon.h"
19#include "fbcon_rotate.h"
20
21/*
22 * Rotation 90 degrees
23 */
24
25static void cw_update_attr(u8 *dst, u8 *src, int attribute,
26				  struct vc_data *vc)
27{
28	int i, j, offset = (vc->vc_font.height < 10) ? 1 : 2;
29	int width = (vc->vc_font.height + 7) >> 3;
30	u8 c, t = 0, msk = ~(0xff >> offset);
31
32	for (i = 0; i < vc->vc_font.width; i++) {
33		for (j = 0; j < width; j++) {
34			c = *src;
35			if (attribute & FBCON_ATTRIBUTE_UNDERLINE && !j)
36				c |= msk;
37			if (attribute & FBCON_ATTRIBUTE_BOLD && i)
38				c |= *(src-width);
39			if (attribute & FBCON_ATTRIBUTE_REVERSE)
40				c = ~c;
41			src++;
42			*dst++ = c;
43			t = c;
44		}
45	}
46}
47
48
49static void cw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
50		     int sx, int dy, int dx, int height, int width)
51{
52	struct fbcon_ops *ops = info->fbcon_par;
53	struct fb_copyarea area;
54	u32 vxres = GETVXRES(ops->p->scrollmode, info);
55
56	area.sx = vxres - ((sy + height) * vc->vc_font.height);
57	area.sy = sx * vc->vc_font.width;
58	area.dx = vxres - ((dy + height) * vc->vc_font.height);
59	area.dy = dx * vc->vc_font.width;
60	area.width = height * vc->vc_font.height;
61	area.height  = width * vc->vc_font.width;
62
63	info->fbops->fb_copyarea(info, &area);
64}
65
66static void cw_clear(struct vc_data *vc, struct fb_info *info, int sy,
67		     int sx, int height, int width)
68{
69	struct fbcon_ops *ops = info->fbcon_par;
70	struct fb_fillrect region;
71	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
72	u32 vxres = GETVXRES(ops->p->scrollmode, info);
73
74	region.color = attr_bgcol_ec(bgshift,vc,info);
75	region.dx = vxres - ((sy + height) * vc->vc_font.height);
76	region.dy = sx *  vc->vc_font.width;
77	region.height = width * vc->vc_font.width;
78	region.width = height * vc->vc_font.height;
79	region.rop = ROP_COPY;
80
81	info->fbops->fb_fillrect(info, &region);
82}
83
84static inline void cw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
85				    const u16 *s, u32 attr, u32 cnt,
86				    u32 d_pitch, u32 s_pitch, u32 cellsize,
87				    struct fb_image *image, u8 *buf, u8 *dst)
88{
89	struct fbcon_ops *ops = info->fbcon_par;
90	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
91	u32 idx = (vc->vc_font.height + 7) >> 3;
92	u8 *src;
93
94	while (cnt--) {
95		src = ops->fontbuffer + (scr_readw(s++) & charmask)*cellsize;
96
97		if (attr) {
98			cw_update_attr(buf, src, attr, vc);
99			src = buf;
100		}
101
102		if (likely(idx == 1))
103			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,
104						vc->vc_font.width);
105		else
106			fb_pad_aligned_buffer(dst, d_pitch, src, idx,
107					      vc->vc_font.width);
108
109		dst += d_pitch * vc->vc_font.width;
110	}
111
112	info->fbops->fb_imageblit(info, image);
113}
114
115static void cw_putcs(struct vc_data *vc, struct fb_info *info,
116		      const unsigned short *s, int count, int yy, int xx,
117		      int fg, int bg)
118{
119	struct fb_image image;
120	struct fbcon_ops *ops = info->fbcon_par;
121	u32 width = (vc->vc_font.height + 7)/8;
122	u32 cellsize = width * vc->vc_font.width;
123	u32 maxcnt = info->pixmap.size/cellsize;
124	u32 scan_align = info->pixmap.scan_align - 1;
125	u32 buf_align = info->pixmap.buf_align - 1;
126	u32 cnt, pitch, size;
127	u32 attribute = get_attribute(info, scr_readw(s));
128	u8 *dst, *buf = NULL;
129	u32 vxres = GETVXRES(ops->p->scrollmode, info);
130
131	if (!ops->fontbuffer)
132		return;
133
134	image.fg_color = fg;
135	image.bg_color = bg;
136	image.dx = vxres - ((yy + 1) * vc->vc_font.height);
137	image.dy = xx * vc->vc_font.width;
138	image.width = vc->vc_font.height;
139	image.depth = 1;
140
141	if (attribute) {
142		buf = kmalloc(cellsize, GFP_KERNEL);
143		if (!buf)
144			return;
145	}
146
147	while (count) {
148		if (count > maxcnt)
149			cnt = maxcnt;
150		else
151			cnt = count;
152
153		image.height = vc->vc_font.width * cnt;
154		pitch = ((image.width + 7) >> 3) + scan_align;
155		pitch &= ~scan_align;
156		size = pitch * image.height + buf_align;
157		size &= ~buf_align;
158		dst = fb_get_buffer_offset(info, &info->pixmap, size);
159		image.data = dst;
160		cw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
161				 width, cellsize, &image, buf, dst);
162		image.dy += image.height;
163		count -= cnt;
164		s += cnt;
165	}
166
167	/* buf is always NULL except when in monochrome mode, so in this case
168	   it's a gain to check buf against NULL even though kfree() handles
169	   NULL pointers just fine */
170	if (unlikely(buf))
171		kfree(buf);
172
173}
174
175static void cw_clear_margins(struct vc_data *vc, struct fb_info *info,
176			     int bottom_only)
177{
178	unsigned int cw = vc->vc_font.width;
179	unsigned int ch = vc->vc_font.height;
180	unsigned int rw = info->var.yres - (vc->vc_cols*cw);
181	unsigned int bh = info->var.xres - (vc->vc_rows*ch);
182	unsigned int rs = info->var.yres - rw;
183	struct fb_fillrect region;
184	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
185
186	region.color = attr_bgcol_ec(bgshift,vc,info);
187	region.rop = ROP_COPY;
188
189	if (rw && !bottom_only) {
190		region.dx = 0;
191		region.dy = info->var.yoffset + rs;
192		region.height = rw;
193		region.width = info->var.xres_virtual;
194		info->fbops->fb_fillrect(info, &region);
195	}
196
197	if (bh) {
198		region.dx = info->var.xoffset;
199		region.dy = info->var.yoffset;
200                region.height = info->var.yres;
201                region.width = bh;
202		info->fbops->fb_fillrect(info, &region);
203	}
204}
205
206static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
207		      int softback_lines, int fg, int bg)
208{
209	struct fb_cursor cursor;
210	struct fbcon_ops *ops = info->fbcon_par;
211	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
212	int w = (vc->vc_font.height + 7) >> 3, c;
213	int y = real_y(ops->p, vc->vc_y);
214	int attribute, use_sw = (vc->vc_cursor_type & 0x10);
215	int err = 1, dx, dy;
216	char *src;
217	u32 vxres = GETVXRES(ops->p->scrollmode, info);
218
219	if (!ops->fontbuffer)
220		return;
221
222	cursor.set = 0;
223
224	if (softback_lines) {
225		if (y + softback_lines >= vc->vc_rows) {
226			mode = CM_ERASE;
227			ops->cursor_flash = 0;
228			return;
229		} else
230			y += softback_lines;
231	}
232
233 	c = scr_readw((u16 *) vc->vc_pos);
234	attribute = get_attribute(info, c);
235	src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
236
237	if (ops->cursor_state.image.data != src ||
238	    ops->cursor_reset) {
239	    ops->cursor_state.image.data = src;
240	    cursor.set |= FB_CUR_SETIMAGE;
241	}
242
243	if (attribute) {
244		u8 *dst;
245
246		dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
247		if (!dst)
248			return;
249		kfree(ops->cursor_data);
250		ops->cursor_data = dst;
251		cw_update_attr(dst, src, attribute, vc);
252		src = dst;
253	}
254
255	if (ops->cursor_state.image.fg_color != fg ||
256	    ops->cursor_state.image.bg_color != bg ||
257	    ops->cursor_reset) {
258		ops->cursor_state.image.fg_color = fg;
259		ops->cursor_state.image.bg_color = bg;
260		cursor.set |= FB_CUR_SETCMAP;
261	}
262
263	if (ops->cursor_state.image.height != vc->vc_font.width ||
264	    ops->cursor_state.image.width != vc->vc_font.height ||
265	    ops->cursor_reset) {
266		ops->cursor_state.image.height = vc->vc_font.width;
267		ops->cursor_state.image.width = vc->vc_font.height;
268		cursor.set |= FB_CUR_SETSIZE;
269	}
270
271	dx = vxres - ((y * vc->vc_font.height) + vc->vc_font.height);
272	dy = vc->vc_x * vc->vc_font.width;
273
274	if (ops->cursor_state.image.dx != dx ||
275	    ops->cursor_state.image.dy != dy ||
276	    ops->cursor_reset) {
277		ops->cursor_state.image.dx = dx;
278		ops->cursor_state.image.dy = dy;
279		cursor.set |= FB_CUR_SETPOS;
280	}
281
282	if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
283	    ops->cursor_reset) {
284		ops->cursor_state.hot.x = cursor.hot.y = 0;
285		cursor.set |= FB_CUR_SETHOT;
286	}
287
288	if (cursor.set & FB_CUR_SETSIZE ||
289	    vc->vc_cursor_type != ops->p->cursor_shape ||
290	    ops->cursor_state.mask == NULL ||
291	    ops->cursor_reset) {
292		char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
293		int cur_height, size, i = 0;
294		int width = (vc->vc_font.width + 7)/8;
295
296		if (!mask)
297			return;
298
299		tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
300
301		if (!tmp) {
302			kfree(mask);
303			return;
304		}
305
306		kfree(ops->cursor_state.mask);
307		ops->cursor_state.mask = mask;
308
309		ops->p->cursor_shape = vc->vc_cursor_type;
310		cursor.set |= FB_CUR_SETSHAPE;
311
312		switch (ops->p->cursor_shape & CUR_HWMASK) {
313		case CUR_NONE:
314			cur_height = 0;
315			break;
316		case CUR_UNDERLINE:
317			cur_height = (vc->vc_font.height < 10) ? 1 : 2;
318			break;
319		case CUR_LOWER_THIRD:
320			cur_height = vc->vc_font.height/3;
321			break;
322		case CUR_LOWER_HALF:
323			cur_height = vc->vc_font.height >> 1;
324			break;
325		case CUR_TWO_THIRDS:
326			cur_height = (vc->vc_font.height << 1)/3;
327			break;
328		case CUR_BLOCK:
329		default:
330			cur_height = vc->vc_font.height;
331			break;
332		}
333
334		size = (vc->vc_font.height - cur_height) * width;
335		while (size--)
336			tmp[i++] = 0;
337		size = cur_height * width;
338		while (size--)
339			tmp[i++] = 0xff;
340		memset(mask, 0, w * vc->vc_font.width);
341		rotate_cw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
342		kfree(tmp);
343	}
344
345	switch (mode) {
346	case CM_ERASE:
347		ops->cursor_state.enable = 0;
348		break;
349	case CM_DRAW:
350	case CM_MOVE:
351	default:
352		ops->cursor_state.enable = (use_sw) ? 0 : 1;
353		break;
354	}
355
356	cursor.image.data = src;
357	cursor.image.fg_color = ops->cursor_state.image.fg_color;
358	cursor.image.bg_color = ops->cursor_state.image.bg_color;
359	cursor.image.dx = ops->cursor_state.image.dx;
360	cursor.image.dy = ops->cursor_state.image.dy;
361	cursor.image.height = ops->cursor_state.image.height;
362	cursor.image.width = ops->cursor_state.image.width;
363	cursor.hot.x = ops->cursor_state.hot.x;
364	cursor.hot.y = ops->cursor_state.hot.y;
365	cursor.mask = ops->cursor_state.mask;
366	cursor.enable = ops->cursor_state.enable;
367	cursor.image.depth = 1;
368	cursor.rop = ROP_XOR;
369
370	if (info->fbops->fb_cursor)
371		err = info->fbops->fb_cursor(info, &cursor);
372
373	if (err)
374		soft_cursor(info, &cursor);
375
376	ops->cursor_reset = 0;
377}
378
379static int cw_update_start(struct fb_info *info)
380{
381	struct fbcon_ops *ops = info->fbcon_par;
382	u32 vxres = GETVXRES(ops->p->scrollmode, info);
383	u32 xoffset;
384	int err;
385
386	xoffset = vxres - (info->var.xres + ops->var.yoffset);
387	ops->var.yoffset = ops->var.xoffset;
388	ops->var.xoffset = xoffset;
389	err = fb_pan_display(info, &ops->var);
390	ops->var.xoffset = info->var.xoffset;
391	ops->var.yoffset = info->var.yoffset;
392	ops->var.vmode = info->var.vmode;
393	return err;
394}
395
396void fbcon_rotate_cw(struct fbcon_ops *ops)
397{
398	ops->bmove = cw_bmove;
399	ops->clear = cw_clear;
400	ops->putcs = cw_putcs;
401	ops->clear_margins = cw_clear_margins;
402	ops->cursor = cw_cursor;
403	ops->update_start = cw_update_start;
404}
405EXPORT_SYMBOL(fbcon_rotate_cw);
406
407MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
408MODULE_DESCRIPTION("Console Rotation (90 degrees) Support");
409MODULE_LICENSE("GPL");
410