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/drivers/video/console/fbcon_ccw.c

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C | 425 lines | 344 code | 66 blank | 15 comment | 55 complexity | 1069cd926b6677dd24da872700cf3927 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1/*
  2 *  linux/drivers/video/console/fbcon_ccw.c -- Software Rotation - 270 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 270 degrees
 23 */
 24
 25static void ccw_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	int mod = vc->vc_font.height % 8;
 31	u8 c, msk = ~(0xff << offset), msk1 = 0;
 32
 33	if (mod)
 34		msk <<= (8 - mod);
 35
 36	if (offset > mod)
 37		msk1 |= 0x01;
 38
 39	for (i = 0; i < vc->vc_font.width; i++) {
 40		for (j = 0; j < width; j++) {
 41			c = *src;
 42
 43			if (attribute & FBCON_ATTRIBUTE_UNDERLINE) {
 44				if (j == width - 1)
 45					c |= msk;
 46
 47				if (msk1 && j == width - 2)
 48					c |= msk1;
 49			}
 50
 51			if (attribute & FBCON_ATTRIBUTE_BOLD && i)
 52				*(dst - width) |= c;
 53
 54			if (attribute & FBCON_ATTRIBUTE_REVERSE)
 55				c = ~c;
 56			src++;
 57			*dst++ = c;
 58		}
 59	}
 60}
 61
 62
 63static void ccw_bmove(struct vc_data *vc, struct fb_info *info, int sy,
 64		     int sx, int dy, int dx, int height, int width)
 65{
 66	struct fbcon_ops *ops = info->fbcon_par;
 67	struct fb_copyarea area;
 68	u32 vyres = GETVYRES(ops->p->scrollmode, info);
 69
 70	area.sx = sy * vc->vc_font.height;
 71	area.sy = vyres - ((sx + width) * vc->vc_font.width);
 72	area.dx = dy * vc->vc_font.height;
 73	area.dy = vyres - ((dx + width) * vc->vc_font.width);
 74	area.width = height * vc->vc_font.height;
 75	area.height  = width * vc->vc_font.width;
 76
 77	info->fbops->fb_copyarea(info, &area);
 78}
 79
 80static void ccw_clear(struct vc_data *vc, struct fb_info *info, int sy,
 81		     int sx, int height, int width)
 82{
 83	struct fbcon_ops *ops = info->fbcon_par;
 84	struct fb_fillrect region;
 85	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
 86	u32 vyres = GETVYRES(ops->p->scrollmode, info);
 87
 88	region.color = attr_bgcol_ec(bgshift,vc,info);
 89	region.dx = sy * vc->vc_font.height;
 90	region.dy = vyres - ((sx + width) * vc->vc_font.width);
 91	region.height = width * vc->vc_font.width;
 92	region.width = height * vc->vc_font.height;
 93	region.rop = ROP_COPY;
 94
 95	info->fbops->fb_fillrect(info, &region);
 96}
 97
 98static inline void ccw_putcs_aligned(struct vc_data *vc, struct fb_info *info,
 99				    const u16 *s, u32 attr, u32 cnt,
100				    u32 d_pitch, u32 s_pitch, u32 cellsize,
101				    struct fb_image *image, u8 *buf, u8 *dst)
102{
103	struct fbcon_ops *ops = info->fbcon_par;
104	u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
105	u32 idx = (vc->vc_font.height + 7) >> 3;
106	u8 *src;
107
108	while (cnt--) {
109		src = ops->fontbuffer + (scr_readw(s--) & charmask)*cellsize;
110
111		if (attr) {
112			ccw_update_attr(buf, src, attr, vc);
113			src = buf;
114		}
115
116		if (likely(idx == 1))
117			__fb_pad_aligned_buffer(dst, d_pitch, src, idx,
118						vc->vc_font.width);
119		else
120			fb_pad_aligned_buffer(dst, d_pitch, src, idx,
121					      vc->vc_font.width);
122
123		dst += d_pitch * vc->vc_font.width;
124	}
125
126	info->fbops->fb_imageblit(info, image);
127}
128
129static void ccw_putcs(struct vc_data *vc, struct fb_info *info,
130		      const unsigned short *s, int count, int yy, int xx,
131		      int fg, int bg)
132{
133	struct fb_image image;
134	struct fbcon_ops *ops = info->fbcon_par;
135	u32 width = (vc->vc_font.height + 7)/8;
136	u32 cellsize = width * vc->vc_font.width;
137	u32 maxcnt = info->pixmap.size/cellsize;
138	u32 scan_align = info->pixmap.scan_align - 1;
139	u32 buf_align = info->pixmap.buf_align - 1;
140	u32 cnt, pitch, size;
141	u32 attribute = get_attribute(info, scr_readw(s));
142	u8 *dst, *buf = NULL;
143	u32 vyres = GETVYRES(ops->p->scrollmode, info);
144
145	if (!ops->fontbuffer)
146		return;
147
148	image.fg_color = fg;
149	image.bg_color = bg;
150	image.dx = yy * vc->vc_font.height;
151	image.dy = vyres - ((xx + count) * vc->vc_font.width);
152	image.width = vc->vc_font.height;
153	image.depth = 1;
154
155	if (attribute) {
156		buf = kmalloc(cellsize, GFP_KERNEL);
157		if (!buf)
158			return;
159	}
160
161	s += count - 1;
162
163	while (count) {
164		if (count > maxcnt)
165			cnt = maxcnt;
166		else
167			cnt = count;
168
169		image.height = vc->vc_font.width * cnt;
170		pitch = ((image.width + 7) >> 3) + scan_align;
171		pitch &= ~scan_align;
172		size = pitch * image.height + buf_align;
173		size &= ~buf_align;
174		dst = fb_get_buffer_offset(info, &info->pixmap, size);
175		image.data = dst;
176		ccw_putcs_aligned(vc, info, s, attribute, cnt, pitch,
177				 width, cellsize, &image, buf, dst);
178		image.dy += image.height;
179		count -= cnt;
180		s -= cnt;
181	}
182
183	/* buf is always NULL except when in monochrome mode, so in this case
184	   it's a gain to check buf against NULL even though kfree() handles
185	   NULL pointers just fine */
186	if (unlikely(buf))
187		kfree(buf);
188
189}
190
191static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
192			     int bottom_only)
193{
194	unsigned int cw = vc->vc_font.width;
195	unsigned int ch = vc->vc_font.height;
196	unsigned int rw = info->var.yres - (vc->vc_cols*cw);
197	unsigned int bh = info->var.xres - (vc->vc_rows*ch);
198	unsigned int bs = vc->vc_rows*ch;
199	struct fb_fillrect region;
200	int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
201
202	region.color = attr_bgcol_ec(bgshift,vc,info);
203	region.rop = ROP_COPY;
204
205	if (rw && !bottom_only) {
206		region.dx = 0;
207		region.dy = info->var.yoffset;
208		region.height = rw;
209		region.width = info->var.xres_virtual;
210		info->fbops->fb_fillrect(info, &region);
211	}
212
213	if (bh) {
214		region.dx = info->var.xoffset + bs;
215		region.dy = 0;
216                region.height = info->var.yres_virtual;
217                region.width = bh;
218		info->fbops->fb_fillrect(info, &region);
219	}
220}
221
222static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
223		       int softback_lines, int fg, int bg)
224{
225	struct fb_cursor cursor;
226	struct fbcon_ops *ops = info->fbcon_par;
227	unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
228	int w = (vc->vc_font.height + 7) >> 3, c;
229	int y = real_y(ops->p, vc->vc_y);
230	int attribute, use_sw = (vc->vc_cursor_type & 0x10);
231	int err = 1, dx, dy;
232	char *src;
233	u32 vyres = GETVYRES(ops->p->scrollmode, info);
234
235	if (!ops->fontbuffer)
236		return;
237
238	cursor.set = 0;
239
240	if (softback_lines) {
241		if (y + softback_lines >= vc->vc_rows) {
242			mode = CM_ERASE;
243			ops->cursor_flash = 0;
244			return;
245		} else
246			y += softback_lines;
247	}
248
249 	c = scr_readw((u16 *) vc->vc_pos);
250	attribute = get_attribute(info, c);
251	src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
252
253	if (ops->cursor_state.image.data != src ||
254	    ops->cursor_reset) {
255	    ops->cursor_state.image.data = src;
256	    cursor.set |= FB_CUR_SETIMAGE;
257	}
258
259	if (attribute) {
260		u8 *dst;
261
262		dst = kmalloc(w * vc->vc_font.width, GFP_ATOMIC);
263		if (!dst)
264			return;
265		kfree(ops->cursor_data);
266		ops->cursor_data = dst;
267		ccw_update_attr(dst, src, attribute, vc);
268		src = dst;
269	}
270
271	if (ops->cursor_state.image.fg_color != fg ||
272	    ops->cursor_state.image.bg_color != bg ||
273	    ops->cursor_reset) {
274		ops->cursor_state.image.fg_color = fg;
275		ops->cursor_state.image.bg_color = bg;
276		cursor.set |= FB_CUR_SETCMAP;
277	}
278
279	if (ops->cursor_state.image.height != vc->vc_font.width ||
280	    ops->cursor_state.image.width != vc->vc_font.height ||
281	    ops->cursor_reset) {
282		ops->cursor_state.image.height = vc->vc_font.width;
283		ops->cursor_state.image.width = vc->vc_font.height;
284		cursor.set |= FB_CUR_SETSIZE;
285	}
286
287	dx = y * vc->vc_font.height;
288	dy = vyres - ((vc->vc_x + 1) * vc->vc_font.width);
289
290	if (ops->cursor_state.image.dx != dx ||
291	    ops->cursor_state.image.dy != dy ||
292	    ops->cursor_reset) {
293		ops->cursor_state.image.dx = dx;
294		ops->cursor_state.image.dy = dy;
295		cursor.set |= FB_CUR_SETPOS;
296	}
297
298	if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
299	    ops->cursor_reset) {
300		ops->cursor_state.hot.x = cursor.hot.y = 0;
301		cursor.set |= FB_CUR_SETHOT;
302	}
303
304	if (cursor.set & FB_CUR_SETSIZE ||
305	    vc->vc_cursor_type != ops->p->cursor_shape ||
306	    ops->cursor_state.mask == NULL ||
307	    ops->cursor_reset) {
308		char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
309		int cur_height, size, i = 0;
310		int width = (vc->vc_font.width + 7)/8;
311
312		if (!mask)
313			return;
314
315		tmp = kmalloc(width * vc->vc_font.height, GFP_ATOMIC);
316
317		if (!tmp) {
318			kfree(mask);
319			return;
320		}
321
322		kfree(ops->cursor_state.mask);
323		ops->cursor_state.mask = mask;
324
325		ops->p->cursor_shape = vc->vc_cursor_type;
326		cursor.set |= FB_CUR_SETSHAPE;
327
328		switch (ops->p->cursor_shape & CUR_HWMASK) {
329		case CUR_NONE:
330			cur_height = 0;
331			break;
332		case CUR_UNDERLINE:
333			cur_height = (vc->vc_font.height < 10) ? 1 : 2;
334			break;
335		case CUR_LOWER_THIRD:
336			cur_height = vc->vc_font.height/3;
337			break;
338		case CUR_LOWER_HALF:
339			cur_height = vc->vc_font.height >> 1;
340			break;
341		case CUR_TWO_THIRDS:
342			cur_height = (vc->vc_font.height << 1)/3;
343			break;
344		case CUR_BLOCK:
345		default:
346			cur_height = vc->vc_font.height;
347			break;
348		}
349
350		size = (vc->vc_font.height - cur_height) * width;
351		while (size--)
352			tmp[i++] = 0;
353		size = cur_height * width;
354		while (size--)
355			tmp[i++] = 0xff;
356		memset(mask, 0, w * vc->vc_font.width);
357		rotate_ccw(tmp, mask, vc->vc_font.width, vc->vc_font.height);
358		kfree(tmp);
359	}
360
361	switch (mode) {
362	case CM_ERASE:
363		ops->cursor_state.enable = 0;
364		break;
365	case CM_DRAW:
366	case CM_MOVE:
367	default:
368		ops->cursor_state.enable = (use_sw) ? 0 : 1;
369		break;
370	}
371
372	cursor.image.data = src;
373	cursor.image.fg_color = ops->cursor_state.image.fg_color;
374	cursor.image.bg_color = ops->cursor_state.image.bg_color;
375	cursor.image.dx = ops->cursor_state.image.dx;
376	cursor.image.dy = ops->cursor_state.image.dy;
377	cursor.image.height = ops->cursor_state.image.height;
378	cursor.image.width = ops->cursor_state.image.width;
379	cursor.hot.x = ops->cursor_state.hot.x;
380	cursor.hot.y = ops->cursor_state.hot.y;
381	cursor.mask = ops->cursor_state.mask;
382	cursor.enable = ops->cursor_state.enable;
383	cursor.image.depth = 1;
384	cursor.rop = ROP_XOR;
385
386	if (info->fbops->fb_cursor)
387		err = info->fbops->fb_cursor(info, &cursor);
388
389	if (err)
390		soft_cursor(info, &cursor);
391
392	ops->cursor_reset = 0;
393}
394
395static int ccw_update_start(struct fb_info *info)
396{
397	struct fbcon_ops *ops = info->fbcon_par;
398	u32 yoffset;
399	u32 vyres = GETVYRES(ops->p->scrollmode, info);
400	int err;
401
402	yoffset = (vyres - info->var.yres) - ops->var.xoffset;
403	ops->var.xoffset = ops->var.yoffset;
404	ops->var.yoffset = yoffset;
405	err = fb_pan_display(info, &ops->var);
406	ops->var.xoffset = info->var.xoffset;
407	ops->var.yoffset = info->var.yoffset;
408	ops->var.vmode = info->var.vmode;
409	return err;
410}
411
412void fbcon_rotate_ccw(struct fbcon_ops *ops)
413{
414	ops->bmove = ccw_bmove;
415	ops->clear = ccw_clear;
416	ops->putcs = ccw_putcs;
417	ops->clear_margins = ccw_clear_margins;
418	ops->cursor = ccw_cursor;
419	ops->update_start = ccw_update_start;
420}
421EXPORT_SYMBOL(fbcon_rotate_ccw);
422
423MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
424MODULE_DESCRIPTION("Console Rotation (270 degrees) Support");
425MODULE_LICENSE("GPL");