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fbcon_cw.c
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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 
25 static 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 
49 static 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 
66 static 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 
84 static 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 
115 static 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 
175 static 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 
206 static 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 
379 static 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 
396 void 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 }
405 EXPORT_SYMBOL(fbcon_rotate_cw);
406 
407 MODULE_AUTHOR("Antonino Daplas <[email protected]>");
408 MODULE_DESCRIPTION("Console Rotation (90 degrees) Support");
409 MODULE_LICENSE("GPL");
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