2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
4 * Copyright (C) 1995 Geert Uytterhoeven
7 * This file is based on the original Amiga console driver (amicon.c):
9 * Copyright (C) 1993 Hamish Macdonald
11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
13 * with work by William Rucklidge (wjr@cs.cornell.edu)
15 * Jes Sorensen (jds@kom.auc.dk)
18 * and on the original Atari console driver (atacon.c):
20 * Copyright (C) 1993 Bjoern Brauel
23 * with work by Guenther Kelleter
27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
28 * Smart redraw scrolling, arbitrary font width support, 512char font support
29 * and software scrollback added by
30 * Jakub Jelinek (jj@ultra.linux.cz)
32 * Random hacking by Martin Mares <mj@ucw.cz>
34 * 2001 - Documented with DocBook
35 * - Brad Douglas <brad@neruo.com>
37 * The low level operations for the various display memory organizations are
38 * now in separate source files.
40 * Currently the following organizations are supported:
42 * o afb Amiga bitplanes
43 * o cfb{2,4,8,16,24,32} Packed pixels
44 * o ilbm Amiga interleaved bitplanes
45 * o iplan2p[248] Atari interleaved bitplanes
47 * o vga VGA characters/attributes
51 * - Implement 16 plane mode (iplan2p16)
54 * This file is subject to the terms and conditions of the GNU General Public
55 * License. See the file COPYING in the main directory of this archive for
61 #include <linux/config.h>
62 #include <linux/module.h>
63 #include <linux/types.h>
64 #include <linux/sched.h>
66 #include <linux/kernel.h>
67 #include <linux/delay.h> /* MSch: for IRQ probe */
68 #include <linux/tty.h>
69 #include <linux/console.h>
70 #include <linux/string.h>
72 #include <linux/slab.h>
74 #include <linux/vt_kern.h>
75 #include <linux/selection.h>
76 #include <linux/font.h>
77 #include <linux/smp.h>
78 #include <linux/init.h>
79 #include <linux/interrupt.h>
80 #include <linux/crc32.h> /* For counting font checksums */
82 #include <asm/system.h>
83 #include <asm/uaccess.h>
85 #include <asm/atariints.h>
88 #include <asm/macints.h>
90 #if defined(__mc68000__) || defined(CONFIG_APUS)
91 #include <asm/machdep.h>
92 #include <asm/setup.h>
98 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
100 # define DPRINTK(fmt, args...)
104 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
105 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
106 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
109 struct display fb_display[MAX_NR_CONSOLES];
110 EXPORT_SYMBOL(fb_display);
112 static signed char con2fb_map[MAX_NR_CONSOLES];
113 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
114 static int logo_height;
115 static int logo_lines;
116 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
118 static int logo_shown = FBCON_LOGO_CANSHOW;
119 /* Software scrollback */
120 static int fbcon_softback_size = 32768;
121 static unsigned long softback_buf, softback_curr;
122 static unsigned long softback_in;
123 static unsigned long softback_top, softback_end;
124 static int softback_lines;
125 /* console mappings */
126 static int first_fb_vc;
127 static int last_fb_vc = MAX_NR_CONSOLES - 1;
128 static int fbcon_is_default = 1;
130 static char fontname[40];
132 /* current fb_info */
133 static int info_idx = -1;
135 /* console rotation */
138 static const struct consw fb_con;
140 #define CM_SOFTBACK (8)
142 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
144 static void fbcon_free_font(struct display *);
145 static int fbcon_set_origin(struct vc_data *);
147 #define CURSOR_DRAW_DELAY (1)
149 /* # VBL ints between cursor state changes */
150 #define ATARI_CURSOR_BLINK_RATE (42)
151 #define MAC_CURSOR_BLINK_RATE (32)
152 #define DEFAULT_CURSOR_BLINK_RATE (20)
154 static int vbl_cursor_cnt;
156 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
159 * Interface used by the world
162 static const char *fbcon_startup(void);
163 static void fbcon_init(struct vc_data *vc, int init);
164 static void fbcon_deinit(struct vc_data *vc);
165 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
167 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
168 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
169 int count, int ypos, int xpos);
170 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
171 static void fbcon_cursor(struct vc_data *vc, int mode);
172 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
174 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
175 int height, int width);
176 static int fbcon_switch(struct vc_data *vc);
177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
178 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
179 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
184 static __inline__ void ywrap_up(struct vc_data *vc, int count);
185 static __inline__ void ywrap_down(struct vc_data *vc, int count);
186 static __inline__ void ypan_up(struct vc_data *vc, int count);
187 static __inline__ void ypan_down(struct vc_data *vc, int count);
188 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
189 int dy, int dx, int height, int width, u_int y_break);
190 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
192 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
194 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
195 int line, int count, int dy);
196 static void fbcon_modechanged(struct fb_info *info);
197 static void fbcon_set_all_vcs(struct fb_info *info);
201 * On the Macintoy, there may or may not be a working VBL int. We need to probe
203 static int vbl_detected;
205 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
212 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
213 static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
215 struct fbcon_ops *ops = info->fbcon_par;
217 if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
219 ops->rotate = p->con_rotate;
224 static void fbcon_rotate(struct fb_info *info, u32 rotate)
226 struct fbcon_ops *ops= info->fbcon_par;
227 struct fb_info *fb_info;
229 if (!ops || ops->currcon == -1)
232 fb_info = registered_fb[con2fb_map[ops->currcon]];
234 if (info == fb_info) {
235 struct display *p = &fb_display[ops->currcon];
238 p->con_rotate = rotate;
242 fbcon_modechanged(info);
246 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
248 struct fbcon_ops *ops = info->fbcon_par;
253 if (!ops || ops->currcon < 0 || rotate > 3)
256 for (i = 0; i < MAX_NR_CONSOLES; i++) {
258 if (!vc || vc->vc_mode != KD_TEXT ||
259 registered_fb[con2fb_map[i]] != info)
262 p = &fb_display[vc->vc_num];
263 p->con_rotate = rotate;
266 fbcon_set_all_vcs(info);
269 static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
271 struct fbcon_ops *ops = info->fbcon_par;
273 ops->rotate = FB_ROTATE_UR;
276 static void fbcon_rotate(struct fb_info *info, u32 rotate)
281 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
285 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
287 static int fbcon_get_rotate(struct fb_info *info)
289 struct fbcon_ops *ops = info->fbcon_par;
291 return (ops) ? ops->rotate : 0;
294 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
296 struct fbcon_ops *ops = info->fbcon_par;
298 return (info->state != FBINFO_STATE_RUNNING ||
299 vc->vc_mode != KD_TEXT || ops->graphics);
302 static inline int get_color(struct vc_data *vc, struct fb_info *info,
305 int depth = fb_get_color_depth(&info->var, &info->fix);
308 if (console_blanked) {
309 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
311 c = vc->vc_video_erase_char & charmask;
315 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
316 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
321 int col = ~(0xfff << (max(info->var.green.length,
322 max(info->var.red.length,
323 info->var.blue.length)))) & 0xff;
326 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
327 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
332 color = (is_fg) ? fg : bg;
337 * Scale down 16-colors to 4 colors. Default 4-color palette
338 * is grayscale. However, simply dividing the values by 4
339 * will not work, as colors 1, 2 and 3 will be scaled-down
340 * to zero rendering them invisible. So empirically convert
341 * colors to a sane 4-level grayscale.
345 color = 0; /* black */
348 color = 2; /* white */
351 color = 1; /* gray */
354 color = 3; /* intense white */
360 * Last 8 entries of default 16-color palette is a more intense
361 * version of the first 8 (i.e., same chrominance, different
372 static void fbcon_update_softback(struct vc_data *vc)
374 int l = fbcon_softback_size / vc->vc_size_row;
377 softback_end = softback_buf + l * vc->vc_size_row;
379 /* Smaller scrollback makes no sense, and 0 would screw
380 the operation totally */
384 static void fb_flashcursor(void *private)
386 struct fb_info *info = private;
387 struct fbcon_ops *ops = info->fbcon_par;
389 struct vc_data *vc = NULL;
393 if (ops->currcon != -1)
394 vc = vc_cons[ops->currcon].d;
396 if (!vc || !CON_IS_VISIBLE(vc) ||
397 fbcon_is_inactive(vc, info) ||
398 registered_fb[con2fb_map[vc->vc_num]] != info ||
399 vc_cons[ops->currcon].d->vc_deccm != 1)
401 acquire_console_sem();
402 p = &fb_display[vc->vc_num];
403 c = scr_readw((u16 *) vc->vc_pos);
404 mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
406 ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
407 get_color(vc, info, c, 0));
408 release_console_sem();
411 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
412 static int cursor_blink_rate;
413 static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
415 struct fb_info *info = dev_id;
417 if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
418 schedule_work(&info->queue);
419 vbl_cursor_cnt = cursor_blink_rate;
425 static void cursor_timer_handler(unsigned long dev_addr)
427 struct fb_info *info = (struct fb_info *) dev_addr;
428 struct fbcon_ops *ops = info->fbcon_par;
430 schedule_work(&info->queue);
431 mod_timer(&ops->cursor_timer, jiffies + HZ/5);
434 static void fbcon_add_cursor_timer(struct fb_info *info)
436 struct fbcon_ops *ops = info->fbcon_par;
438 if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
439 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
440 if (!info->queue.func)
441 INIT_WORK(&info->queue, fb_flashcursor, info);
443 init_timer(&ops->cursor_timer);
444 ops->cursor_timer.function = cursor_timer_handler;
445 ops->cursor_timer.expires = jiffies + HZ / 5;
446 ops->cursor_timer.data = (unsigned long ) info;
447 add_timer(&ops->cursor_timer);
448 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
452 static void fbcon_del_cursor_timer(struct fb_info *info)
454 struct fbcon_ops *ops = info->fbcon_par;
456 if (info->queue.func == fb_flashcursor &&
457 ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
458 del_timer_sync(&ops->cursor_timer);
459 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
464 static int __init fb_console_setup(char *this_opt)
469 if (!this_opt || !*this_opt)
472 while ((options = strsep(&this_opt, ",")) != NULL) {
473 if (!strncmp(options, "font:", 5))
474 strcpy(fontname, options + 5);
476 if (!strncmp(options, "scrollback:", 11)) {
479 fbcon_softback_size = simple_strtoul(options, &options, 0);
480 if (*options == 'k' || *options == 'K') {
481 fbcon_softback_size *= 1024;
491 if (!strncmp(options, "map:", 4)) {
494 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
498 (options[j++]-'0') % FB_MAX;
503 if (!strncmp(options, "vc:", 3)) {
506 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
509 if (*options++ == '-')
510 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
511 fbcon_is_default = 0;
514 if (!strncmp(options, "rotate:", 7)) {
517 rotate = simple_strtoul(options, &options, 0);
525 __setup("fbcon=", fb_console_setup);
528 static int search_fb_in_map(int idx)
532 for (i = 0; i < MAX_NR_CONSOLES; i++) {
533 if (con2fb_map[i] == idx)
539 static int search_for_mapped_con(void)
543 for (i = 0; i < MAX_NR_CONSOLES; i++) {
544 if (con2fb_map[i] != -1)
550 static int fbcon_takeover(int show_logo)
554 if (!num_registered_fb)
558 logo_shown = FBCON_LOGO_DONTSHOW;
560 for (i = first_fb_vc; i <= last_fb_vc; i++)
561 con2fb_map[i] = info_idx;
563 err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
566 for (i = first_fb_vc; i <= last_fb_vc; i++) {
575 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
576 int cols, int rows, int new_cols, int new_rows)
578 /* Need to make room for the logo */
579 struct fbcon_ops *ops = info->fbcon_par;
580 int cnt, erase = vc->vc_video_erase_char, step;
581 unsigned short *save = NULL, *r, *q;
584 * remove underline attribute from erase character
585 * if black and white framebuffer.
587 if (fb_get_color_depth(&info->var, &info->fix) == 1)
589 logo_height = fb_prepare_logo(info, ops->rotate);
590 logo_lines = (logo_height + vc->vc_font.height - 1) /
592 q = (unsigned short *) (vc->vc_origin +
593 vc->vc_size_row * rows);
594 step = logo_lines * cols;
595 for (r = q - logo_lines * cols; r < q; r++)
596 if (scr_readw(r) != vc->vc_video_erase_char)
598 if (r != q && new_rows >= rows + logo_lines) {
599 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
601 int i = cols < new_cols ? cols : new_cols;
602 scr_memsetw(save, erase, logo_lines * new_cols * 2);
604 for (cnt = 0; cnt < logo_lines; cnt++, r += i)
605 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
610 /* We can scroll screen down */
612 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
613 scr_memcpyw(r + step, r, vc->vc_size_row);
617 vc->vc_y += logo_lines;
618 vc->vc_pos += logo_lines * vc->vc_size_row;
621 scr_memsetw((unsigned short *) vc->vc_origin,
623 vc->vc_size_row * logo_lines);
625 if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
626 fbcon_clear_margins(vc, 0);
631 q = (unsigned short *) (vc->vc_origin +
634 scr_memcpyw(q, save, logo_lines * new_cols * 2);
635 vc->vc_y += logo_lines;
636 vc->vc_pos += logo_lines * vc->vc_size_row;
640 if (logo_lines > vc->vc_bottom) {
641 logo_shown = FBCON_LOGO_CANSHOW;
643 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
644 } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
645 logo_shown = FBCON_LOGO_DRAW;
646 vc->vc_top = logo_lines;
650 #ifdef CONFIG_FB_TILEBLITTING
651 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
654 struct fbcon_ops *ops = info->fbcon_par;
656 if ((info->flags & FBINFO_MISC_TILEBLITTING))
657 fbcon_set_tileops(vc, info, p, ops);
659 struct display *disp;
661 disp = (p) ? p : &fb_display[vc->vc_num];
662 fbcon_set_rotation(info, disp);
663 fbcon_set_bitops(ops);
667 static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
670 struct fbcon_ops *ops = info->fbcon_par;
671 struct display *disp;
673 info->flags &= ~FBINFO_MISC_TILEBLITTING;
674 disp = (p) ? p : &fb_display[vc->vc_num];
675 fbcon_set_rotation(info, disp);
676 fbcon_set_bitops(ops);
678 #endif /* CONFIG_MISC_TILEBLITTING */
681 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
682 int unit, int oldidx)
684 struct fbcon_ops *ops = NULL;
687 if (!try_module_get(info->fbops->owner))
690 if (!err && info->fbops->fb_open &&
691 info->fbops->fb_open(info, 0))
695 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
701 memset(ops, 0, sizeof(struct fbcon_ops));
702 info->fbcon_par = ops;
703 set_blitting_type(vc, info, NULL);
707 con2fb_map[unit] = oldidx;
708 module_put(info->fbops->owner);
714 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
715 struct fb_info *newinfo, int unit,
716 int oldidx, int found)
718 struct fbcon_ops *ops = oldinfo->fbcon_par;
721 if (oldinfo->fbops->fb_release &&
722 oldinfo->fbops->fb_release(oldinfo, 0)) {
723 con2fb_map[unit] = oldidx;
724 if (!found && newinfo->fbops->fb_release)
725 newinfo->fbops->fb_release(newinfo, 0);
727 module_put(newinfo->fbops->owner);
732 fbcon_del_cursor_timer(oldinfo);
733 kfree(ops->cursor_state.mask);
734 kfree(ops->cursor_data);
735 kfree(ops->fontbuffer);
736 kfree(oldinfo->fbcon_par);
737 oldinfo->fbcon_par = NULL;
738 module_put(oldinfo->fbops->owner);
740 If oldinfo and newinfo are driving the same hardware,
741 the fb_release() method of oldinfo may attempt to
742 restore the hardware state. This will leave the
743 newinfo in an undefined state. Thus, a call to
744 fb_set_par() may be needed for the newinfo.
746 if (newinfo->fbops->fb_set_par)
747 newinfo->fbops->fb_set_par(newinfo);
753 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
754 int unit, int show_logo)
756 struct fbcon_ops *ops = info->fbcon_par;
758 ops->currcon = fg_console;
760 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
761 info->fbops->fb_set_par(info);
763 ops->flags |= FBCON_FLAGS_INIT;
767 fbcon_set_disp(info, &info->var, vc);
769 fbcon_preset_disp(info, &info->var, unit);
772 struct vc_data *fg_vc = vc_cons[fg_console].d;
773 struct fb_info *fg_info =
774 registered_fb[con2fb_map[fg_console]];
776 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
777 fg_vc->vc_rows, fg_vc->vc_cols,
781 update_screen(vc_cons[fg_console].d);
785 * set_con2fb_map - map console to frame buffer device
786 * @unit: virtual console number to map
787 * @newidx: frame buffer index to map virtual console to
788 * @user: user request
790 * Maps a virtual console @unit to a frame buffer device
793 static int set_con2fb_map(int unit, int newidx, int user)
795 struct vc_data *vc = vc_cons[unit].d;
796 int oldidx = con2fb_map[unit];
797 struct fb_info *info = registered_fb[newidx];
798 struct fb_info *oldinfo = NULL;
801 if (oldidx == newidx)
807 if (!err && !search_for_mapped_con()) {
809 return fbcon_takeover(0);
813 oldinfo = registered_fb[oldidx];
815 found = search_fb_in_map(newidx);
817 acquire_console_sem();
818 con2fb_map[unit] = newidx;
820 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
824 * If old fb is not mapped to any of the consoles,
825 * fbcon should release it.
827 if (!err && oldinfo && !search_fb_in_map(oldidx))
828 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
832 int show_logo = (fg_console == 0 && !user &&
833 logo_shown != FBCON_LOGO_DONTSHOW);
836 fbcon_add_cursor_timer(info);
837 con2fb_map_boot[unit] = newidx;
838 con2fb_init_display(vc, info, unit, show_logo);
841 release_console_sem();
846 * Low Level Operations
848 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
849 static int var_to_display(struct display *disp,
850 struct fb_var_screeninfo *var,
851 struct fb_info *info)
853 disp->xres_virtual = var->xres_virtual;
854 disp->yres_virtual = var->yres_virtual;
855 disp->bits_per_pixel = var->bits_per_pixel;
856 disp->grayscale = var->grayscale;
857 disp->nonstd = var->nonstd;
858 disp->accel_flags = var->accel_flags;
859 disp->height = var->height;
860 disp->width = var->width;
861 disp->red = var->red;
862 disp->green = var->green;
863 disp->blue = var->blue;
864 disp->transp = var->transp;
865 disp->rotate = var->rotate;
866 disp->mode = fb_match_mode(var, &info->modelist);
867 if (disp->mode == NULL)
868 /* This should not happen */
873 static void display_to_var(struct fb_var_screeninfo *var,
874 struct display *disp)
876 fb_videomode_to_var(var, disp->mode);
877 var->xres_virtual = disp->xres_virtual;
878 var->yres_virtual = disp->yres_virtual;
879 var->bits_per_pixel = disp->bits_per_pixel;
880 var->grayscale = disp->grayscale;
881 var->nonstd = disp->nonstd;
882 var->accel_flags = disp->accel_flags;
883 var->height = disp->height;
884 var->width = disp->width;
885 var->red = disp->red;
886 var->green = disp->green;
887 var->blue = disp->blue;
888 var->transp = disp->transp;
889 var->rotate = disp->rotate;
892 static const char *fbcon_startup(void)
894 const char *display_desc = "frame buffer device";
895 struct display *p = &fb_display[fg_console];
896 struct vc_data *vc = vc_cons[fg_console].d;
897 const struct font_desc *font = NULL;
898 struct module *owner;
899 struct fb_info *info = NULL;
900 struct fbcon_ops *ops;
906 * If num_registered_fb is zero, this is a call for the dummy part.
907 * The frame buffer devices weren't initialized yet.
909 if (!num_registered_fb || info_idx == -1)
912 * Instead of blindly using registered_fb[0], we use info_idx, set by
915 info = registered_fb[info_idx];
919 owner = info->fbops->owner;
920 if (!try_module_get(owner))
922 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
927 ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
933 memset(ops, 0, sizeof(struct fbcon_ops));
936 ops->cur_rotate = -1;
937 info->fbcon_par = ops;
938 p->con_rotate = rotate;
939 set_blitting_type(vc, info, NULL);
941 if (info->fix.type != FB_TYPE_TEXT) {
942 if (fbcon_softback_size) {
946 kmalloc(fbcon_softback_size,
949 fbcon_softback_size = 0;
955 kfree((void *) softback_buf);
961 softback_in = softback_top = softback_curr =
966 /* Setup default font */
968 if (!fontname[0] || !(font = find_font(fontname)))
969 font = get_default_font(info->var.xres,
971 vc->vc_font.width = font->width;
972 vc->vc_font.height = font->height;
973 vc->vc_font.data = (void *)(p->fontdata = font->data);
974 vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
977 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
978 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
979 cols /= vc->vc_font.width;
980 rows /= vc->vc_font.height;
981 vc_resize(vc, cols, rows);
983 DPRINTK("mode: %s\n", info->fix.id);
984 DPRINTK("visual: %d\n", info->fix.visual);
985 DPRINTK("res: %dx%d-%d\n", info->var.xres,
987 info->var.bits_per_pixel);
991 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
993 request_irq(IRQ_AUTO_4, fb_vbl_handler,
994 IRQ_TYPE_PRIO, "framebuffer vbl",
997 #endif /* CONFIG_ATARI */
1001 * On a Macintoy, the VBL interrupt may or may not be active.
1002 * As interrupt based cursor is more reliable and race free, we
1003 * probe for VBL interrupts.
1008 * Probe for VBL: set temp. handler ...
1010 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1011 "framebuffer vbl", info);
1015 * ... and spin for 20 ms ...
1017 while (!vbl_detected && ++ct < 1000)
1022 ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1024 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1028 * interrupt based cursor ok
1030 cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1032 request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1033 "framebuffer vbl", info);
1036 * VBL not detected: fall through, use timer based cursor
1041 #endif /* CONFIG_MAC */
1043 fbcon_add_cursor_timer(info);
1044 return display_desc;
1047 static void fbcon_init(struct vc_data *vc, int init)
1049 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1050 struct fbcon_ops *ops;
1051 struct vc_data **default_mode = vc->vc_display_fg;
1052 struct vc_data *svc = *default_mode;
1053 struct display *t, *p = &fb_display[vc->vc_num];
1054 int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1057 if (info_idx == -1 || info == NULL)
1062 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1063 (info->fix.type == FB_TYPE_TEXT))
1066 if (var_to_display(p, &info->var, info))
1069 /* If we are not the first console on this
1070 fb, copy the font from that console */
1071 t = &fb_display[svc->vc_num];
1072 if (!vc->vc_font.data) {
1073 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1074 vc->vc_font.width = (*default_mode)->vc_font.width;
1075 vc->vc_font.height = (*default_mode)->vc_font.height;
1076 p->userfont = t->userfont;
1078 REFCOUNT(p->fontdata)++;
1081 charcnt = FNTCHARCNT(p->fontdata);
1082 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1083 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1084 if (charcnt == 256) {
1085 vc->vc_hi_font_mask = 0;
1087 vc->vc_hi_font_mask = 0x100;
1088 if (vc->vc_can_do_color)
1089 vc->vc_complement_mask <<= 1;
1092 if (!*svc->vc_uni_pagedir_loc)
1093 con_set_default_unimap(svc);
1094 if (!*vc->vc_uni_pagedir_loc)
1095 con_copy_unimap(vc, svc);
1097 ops = info->fbcon_par;
1098 p->con_rotate = rotate;
1099 set_blitting_type(vc, info, NULL);
1103 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1104 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1105 new_cols /= vc->vc_font.width;
1106 new_rows /= vc->vc_font.height;
1107 vc_resize(vc, new_cols, new_rows);
1110 * We must always set the mode. The mode of the previous console
1111 * driver could be in the same resolution but we are using different
1112 * hardware so we have to initialize the hardware.
1114 * We need to do it in fbcon_init() to prevent screen corruption.
1116 if (CON_IS_VISIBLE(vc)) {
1117 if (info->fbops->fb_set_par &&
1118 !(ops->flags & FBCON_FLAGS_INIT))
1119 info->fbops->fb_set_par(info);
1120 ops->flags |= FBCON_FLAGS_INIT;
1125 if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1126 !(cap & FBINFO_HWACCEL_DISABLED))
1127 p->scrollmode = SCROLL_MOVE;
1128 else /* default to something safe */
1129 p->scrollmode = SCROLL_REDRAW;
1132 * ++guenther: console.c:vc_allocate() relies on initializing
1133 * vc_{cols,rows}, but we must not set those if we are only
1134 * resizing the console.
1137 vc->vc_cols = new_cols;
1138 vc->vc_rows = new_rows;
1142 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1144 if (vc == svc && softback_buf)
1145 fbcon_update_softback(vc);
1147 if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
1148 ops->rotate = FB_ROTATE_UR;
1149 set_blitting_type(vc, info, p);
1154 static void fbcon_deinit(struct vc_data *vc)
1156 struct display *p = &fb_display[vc->vc_num];
1163 /* ====================================================================== */
1165 /* fbcon_XXX routines - interface used by the world
1167 * This system is now divided into two levels because of complications
1168 * caused by hardware scrolling. Top level functions:
1170 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1172 * handles y values in range [0, scr_height-1] that correspond to real
1173 * screen positions. y_wrap shift means that first line of bitmap may be
1174 * anywhere on this display. These functions convert lineoffsets to
1175 * bitmap offsets and deal with the wrap-around case by splitting blits.
1177 * fbcon_bmove_physical_8() -- These functions fast implementations
1178 * fbcon_clear_physical_8() -- of original fbcon_XXX fns.
1179 * fbcon_putc_physical_8() -- (font width != 8) may be added later
1183 * At the moment fbcon_putc() cannot blit across vertical wrap boundary
1184 * Implies should only really hardware scroll in rows. Only reason for
1185 * restriction is simplicity & efficiency at the moment.
1188 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1191 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1192 struct fbcon_ops *ops = info->fbcon_par;
1194 struct display *p = &fb_display[vc->vc_num];
1197 if (fbcon_is_inactive(vc, info))
1200 if (!height || !width)
1203 /* Split blits that cross physical y_wrap boundary */
1205 y_break = p->vrows - p->yscroll;
1206 if (sy < y_break && sy + height - 1 >= y_break) {
1207 u_int b = y_break - sy;
1208 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1209 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1212 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1215 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1216 int count, int ypos, int xpos)
1218 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1219 struct display *p = &fb_display[vc->vc_num];
1220 struct fbcon_ops *ops = info->fbcon_par;
1222 if (!fbcon_is_inactive(vc, info))
1223 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1224 get_color(vc, info, scr_readw(s), 1),
1225 get_color(vc, info, scr_readw(s), 0));
1228 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1232 scr_writew(c, &chr);
1233 fbcon_putcs(vc, &chr, 1, ypos, xpos);
1236 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1238 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1239 struct fbcon_ops *ops = info->fbcon_par;
1241 if (!fbcon_is_inactive(vc, info))
1242 ops->clear_margins(vc, info, bottom_only);
1245 static void fbcon_cursor(struct vc_data *vc, int mode)
1247 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1248 struct fbcon_ops *ops = info->fbcon_par;
1249 struct display *p = &fb_display[vc->vc_num];
1251 int c = scr_readw((u16 *) vc->vc_pos);
1253 if (fbcon_is_inactive(vc, info))
1256 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1257 if (mode & CM_SOFTBACK) {
1258 mode &= ~CM_SOFTBACK;
1262 fbcon_set_origin(vc);
1266 ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
1267 get_color(vc, info, c, 0));
1268 vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1271 static int scrollback_phys_max = 0;
1272 static int scrollback_max = 0;
1273 static int scrollback_current = 0;
1276 * If no vc is existent yet, just set struct display
1278 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1281 struct display *p = &fb_display[unit];
1282 struct display *t = &fb_display[fg_console];
1284 if (var_to_display(p, var, info))
1287 p->fontdata = t->fontdata;
1288 p->userfont = t->userfont;
1290 REFCOUNT(p->fontdata)++;
1293 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1296 struct display *p = &fb_display[vc->vc_num], *t;
1297 struct vc_data **default_mode = vc->vc_display_fg;
1298 struct vc_data *svc = *default_mode;
1299 struct fbcon_ops *ops = info->fbcon_par;
1300 int rows, cols, charcnt = 256;
1302 if (var_to_display(p, var, info))
1304 t = &fb_display[svc->vc_num];
1305 if (!vc->vc_font.data) {
1306 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1307 vc->vc_font.width = (*default_mode)->vc_font.width;
1308 vc->vc_font.height = (*default_mode)->vc_font.height;
1309 p->userfont = t->userfont;
1311 REFCOUNT(p->fontdata)++;
1314 charcnt = FNTCHARCNT(p->fontdata);
1316 var->activate = FB_ACTIVATE_NOW;
1317 info->var.activate = var->activate;
1318 var->yoffset = info->var.yoffset;
1319 var->xoffset = info->var.xoffset;
1320 fb_set_var(info, var);
1321 ops->var = info->var;
1322 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1323 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1324 if (charcnt == 256) {
1325 vc->vc_hi_font_mask = 0;
1327 vc->vc_hi_font_mask = 0x100;
1328 if (vc->vc_can_do_color)
1329 vc->vc_complement_mask <<= 1;
1332 if (!*svc->vc_uni_pagedir_loc)
1333 con_set_default_unimap(svc);
1334 if (!*vc->vc_uni_pagedir_loc)
1335 con_copy_unimap(vc, svc);
1337 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1338 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1339 cols /= vc->vc_font.width;
1340 rows /= vc->vc_font.height;
1341 vc_resize(vc, cols, rows);
1343 if (CON_IS_VISIBLE(vc)) {
1346 fbcon_update_softback(vc);
1350 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1352 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1353 struct fbcon_ops *ops = info->fbcon_par;
1354 struct display *p = &fb_display[vc->vc_num];
1356 p->yscroll += count;
1357 if (p->yscroll >= p->vrows) /* Deal with wrap */
1358 p->yscroll -= p->vrows;
1359 ops->var.xoffset = 0;
1360 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1361 ops->var.vmode |= FB_VMODE_YWRAP;
1362 ops->update_start(info);
1363 scrollback_max += count;
1364 if (scrollback_max > scrollback_phys_max)
1365 scrollback_max = scrollback_phys_max;
1366 scrollback_current = 0;
1369 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1371 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1372 struct fbcon_ops *ops = info->fbcon_par;
1373 struct display *p = &fb_display[vc->vc_num];
1375 p->yscroll -= count;
1376 if (p->yscroll < 0) /* Deal with wrap */
1377 p->yscroll += p->vrows;
1378 ops->var.xoffset = 0;
1379 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1380 ops->var.vmode |= FB_VMODE_YWRAP;
1381 ops->update_start(info);
1382 scrollback_max -= count;
1383 if (scrollback_max < 0)
1385 scrollback_current = 0;
1388 static __inline__ void ypan_up(struct vc_data *vc, int count)
1390 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1391 struct display *p = &fb_display[vc->vc_num];
1392 struct fbcon_ops *ops = info->fbcon_par;
1394 p->yscroll += count;
1395 if (p->yscroll > p->vrows - vc->vc_rows) {
1396 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1397 0, 0, 0, vc->vc_rows, vc->vc_cols);
1398 p->yscroll -= p->vrows - vc->vc_rows;
1401 ops->var.xoffset = 0;
1402 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1403 ops->var.vmode &= ~FB_VMODE_YWRAP;
1404 ops->update_start(info);
1405 fbcon_clear_margins(vc, 1);
1406 scrollback_max += count;
1407 if (scrollback_max > scrollback_phys_max)
1408 scrollback_max = scrollback_phys_max;
1409 scrollback_current = 0;
1412 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1414 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1415 struct fbcon_ops *ops = info->fbcon_par;
1416 struct display *p = &fb_display[vc->vc_num];
1419 p->yscroll += count;
1420 if (p->yscroll > p->vrows - vc->vc_rows) {
1421 p->yscroll -= p->vrows - vc->vc_rows;
1426 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1428 ops->var.xoffset = 0;
1429 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1430 ops->var.vmode &= ~FB_VMODE_YWRAP;
1431 ops->update_start(info);
1432 fbcon_clear_margins(vc, 1);
1433 scrollback_max += count;
1434 if (scrollback_max > scrollback_phys_max)
1435 scrollback_max = scrollback_phys_max;
1436 scrollback_current = 0;
1439 static __inline__ void ypan_down(struct vc_data *vc, int count)
1441 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1442 struct display *p = &fb_display[vc->vc_num];
1443 struct fbcon_ops *ops = info->fbcon_par;
1445 p->yscroll -= count;
1446 if (p->yscroll < 0) {
1447 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1448 0, vc->vc_rows, vc->vc_cols);
1449 p->yscroll += p->vrows - vc->vc_rows;
1452 ops->var.xoffset = 0;
1453 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1454 ops->var.vmode &= ~FB_VMODE_YWRAP;
1455 ops->update_start(info);
1456 fbcon_clear_margins(vc, 1);
1457 scrollback_max -= count;
1458 if (scrollback_max < 0)
1460 scrollback_current = 0;
1463 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1465 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1466 struct fbcon_ops *ops = info->fbcon_par;
1467 struct display *p = &fb_display[vc->vc_num];
1470 p->yscroll -= count;
1471 if (p->yscroll < 0) {
1472 p->yscroll += p->vrows - vc->vc_rows;
1477 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1479 ops->var.xoffset = 0;
1480 ops->var.yoffset = p->yscroll * vc->vc_font.height;
1481 ops->var.vmode &= ~FB_VMODE_YWRAP;
1482 ops->update_start(info);
1483 fbcon_clear_margins(vc, 1);
1484 scrollback_max -= count;
1485 if (scrollback_max < 0)
1487 scrollback_current = 0;
1490 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1493 int count = vc->vc_rows;
1494 unsigned short *d, *s;
1498 d = (u16 *) softback_curr;
1499 if (d == (u16 *) softback_in)
1500 d = (u16 *) vc->vc_origin;
1501 n = softback_curr + delta * vc->vc_size_row;
1502 softback_lines -= delta;
1504 if (softback_curr < softback_top && n < softback_buf) {
1505 n += softback_end - softback_buf;
1506 if (n < softback_top) {
1508 (softback_top - n) / vc->vc_size_row;
1511 } else if (softback_curr >= softback_top
1512 && n < softback_top) {
1514 (softback_top - n) / vc->vc_size_row;
1518 if (softback_curr > softback_in && n >= softback_end) {
1519 n += softback_buf - softback_end;
1520 if (n > softback_in) {
1524 } else if (softback_curr <= softback_in && n > softback_in) {
1529 if (n == softback_curr)
1532 s = (u16 *) softback_curr;
1533 if (s == (u16 *) softback_in)
1534 s = (u16 *) vc->vc_origin;
1536 unsigned short *start;
1540 unsigned short attr = 1;
1543 le = advance_row(s, 1);
1546 if (attr != (c & 0xff00)) {
1549 fbcon_putcs(vc, start, s - start,
1555 if (c == scr_readw(d)) {
1557 fbcon_putcs(vc, start, s - start,
1570 fbcon_putcs(vc, start, s - start, line, x);
1572 if (d == (u16 *) softback_end)
1573 d = (u16 *) softback_buf;
1574 if (d == (u16 *) softback_in)
1575 d = (u16 *) vc->vc_origin;
1576 if (s == (u16 *) softback_end)
1577 s = (u16 *) softback_buf;
1578 if (s == (u16 *) softback_in)
1579 s = (u16 *) vc->vc_origin;
1583 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1584 int line, int count, int dy)
1586 unsigned short *s = (unsigned short *)
1587 (vc->vc_origin + vc->vc_size_row * line);
1590 unsigned short *start = s;
1591 unsigned short *le = advance_row(s, 1);
1594 unsigned short attr = 1;
1598 if (attr != (c & 0xff00)) {
1601 fbcon_putcs(vc, start, s - start,
1607 console_conditional_schedule();
1611 fbcon_putcs(vc, start, s - start, dy, x);
1612 console_conditional_schedule();
1617 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1618 int line, int count, int offset)
1620 unsigned short *d = (unsigned short *)
1621 (vc->vc_origin + vc->vc_size_row * line);
1622 unsigned short *s = d + offset;
1625 unsigned short *start = s;
1626 unsigned short *le = advance_row(s, 1);
1629 unsigned short attr = 1;
1633 if (attr != (c & 0xff00)) {
1636 fbcon_putcs(vc, start, s - start,
1642 if (c == scr_readw(d)) {
1644 fbcon_putcs(vc, start, s - start,
1654 console_conditional_schedule();
1659 fbcon_putcs(vc, start, s - start, line, x);
1660 console_conditional_schedule();
1665 /* NOTE: We subtract two lines from these pointers */
1666 s -= vc->vc_size_row;
1667 d -= vc->vc_size_row;
1672 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1677 if (vc->vc_num != fg_console)
1679 p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1682 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1684 p = advance_row(p, 1);
1685 softback_in += vc->vc_size_row;
1686 if (softback_in == softback_end)
1687 softback_in = softback_buf;
1688 if (softback_in == softback_top) {
1689 softback_top += vc->vc_size_row;
1690 if (softback_top == softback_end)
1691 softback_top = softback_buf;
1694 softback_curr = softback_in;
1697 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1700 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1701 struct display *p = &fb_display[vc->vc_num];
1702 struct fbcon_ops *ops = info->fbcon_par;
1703 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1705 if (fbcon_is_inactive(vc, info))
1708 fbcon_cursor(vc, CM_ERASE);
1711 * ++Geert: Only use ywrap/ypan if the console is in text mode
1712 * ++Andrew: Only use ypan on hardware text mode when scrolling the
1713 * whole screen (prevents flicker).
1718 if (count > vc->vc_rows) /* Maximum realistic size */
1719 count = vc->vc_rows;
1721 fbcon_softback_note(vc, t, count);
1722 if (logo_shown >= 0)
1724 switch (p->scrollmode) {
1726 ops->bmove(vc, info, t + count, 0, t, 0,
1727 b - t - count, vc->vc_cols);
1728 ops->clear(vc, info, b - count, 0, count,
1732 case SCROLL_WRAP_MOVE:
1733 if (b - t - count > 3 * vc->vc_rows >> 2) {
1735 fbcon_bmove(vc, 0, 0, count, 0, t,
1737 ywrap_up(vc, count);
1738 if (vc->vc_rows - b > 0)
1739 fbcon_bmove(vc, b - count, 0, b, 0,
1742 } else if (info->flags & FBINFO_READS_FAST)
1743 fbcon_bmove(vc, t + count, 0, t, 0,
1744 b - t - count, vc->vc_cols);
1747 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1750 case SCROLL_PAN_REDRAW:
1751 if ((p->yscroll + count <=
1752 2 * (p->vrows - vc->vc_rows))
1753 && ((!scroll_partial && (b - t == vc->vc_rows))
1756 3 * vc->vc_rows >> 2)))) {
1758 fbcon_redraw_move(vc, p, 0, t, count);
1759 ypan_up_redraw(vc, t, count);
1760 if (vc->vc_rows - b > 0)
1761 fbcon_redraw_move(vc, p, b - count,
1762 vc->vc_rows - b, b);
1764 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1765 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1768 case SCROLL_PAN_MOVE:
1769 if ((p->yscroll + count <=
1770 2 * (p->vrows - vc->vc_rows))
1771 && ((!scroll_partial && (b - t == vc->vc_rows))
1774 3 * vc->vc_rows >> 2)))) {
1776 fbcon_bmove(vc, 0, 0, count, 0, t,
1779 if (vc->vc_rows - b > 0)
1780 fbcon_bmove(vc, b - count, 0, b, 0,
1783 } else if (info->flags & FBINFO_READS_FAST)
1784 fbcon_bmove(vc, t + count, 0, t, 0,
1785 b - t - count, vc->vc_cols);
1788 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1793 fbcon_redraw(vc, p, t, b - t - count,
1794 count * vc->vc_cols);
1795 fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1796 scr_memsetw((unsigned short *) (vc->vc_origin +
1799 vc->vc_video_erase_char,
1800 vc->vc_size_row * count);
1806 if (count > vc->vc_rows) /* Maximum realistic size */
1807 count = vc->vc_rows;
1808 if (logo_shown >= 0)
1810 switch (p->scrollmode) {
1812 ops->bmove(vc, info, t, 0, t + count, 0,
1813 b - t - count, vc->vc_cols);
1814 ops->clear(vc, info, t, 0, count, vc->vc_cols);
1817 case SCROLL_WRAP_MOVE:
1818 if (b - t - count > 3 * vc->vc_rows >> 2) {
1819 if (vc->vc_rows - b > 0)
1820 fbcon_bmove(vc, b, 0, b - count, 0,
1823 ywrap_down(vc, count);
1825 fbcon_bmove(vc, count, 0, 0, 0, t,
1827 } else if (info->flags & FBINFO_READS_FAST)
1828 fbcon_bmove(vc, t, 0, t + count, 0,
1829 b - t - count, vc->vc_cols);
1832 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1835 case SCROLL_PAN_MOVE:
1836 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1837 && ((!scroll_partial && (b - t == vc->vc_rows))
1840 3 * vc->vc_rows >> 2)))) {
1841 if (vc->vc_rows - b > 0)
1842 fbcon_bmove(vc, b, 0, b - count, 0,
1845 ypan_down(vc, count);
1847 fbcon_bmove(vc, count, 0, 0, 0, t,
1849 } else if (info->flags & FBINFO_READS_FAST)
1850 fbcon_bmove(vc, t, 0, t + count, 0,
1851 b - t - count, vc->vc_cols);
1854 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1857 case SCROLL_PAN_REDRAW:
1858 if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1859 && ((!scroll_partial && (b - t == vc->vc_rows))
1862 3 * vc->vc_rows >> 2)))) {
1863 if (vc->vc_rows - b > 0)
1864 fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1866 ypan_down_redraw(vc, t, count);
1868 fbcon_redraw_move(vc, p, count, t, 0);
1870 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1871 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1876 fbcon_redraw(vc, p, b - 1, b - t - count,
1877 -count * vc->vc_cols);
1878 fbcon_clear(vc, t, 0, count, vc->vc_cols);
1879 scr_memsetw((unsigned short *) (vc->vc_origin +
1882 vc->vc_video_erase_char,
1883 vc->vc_size_row * count);
1891 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1892 int height, int width)
1894 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1895 struct display *p = &fb_display[vc->vc_num];
1897 if (fbcon_is_inactive(vc, info))
1900 if (!width || !height)
1903 /* Split blits that cross physical y_wrap case.
1904 * Pathological case involves 4 blits, better to use recursive
1905 * code rather than unrolled case
1907 * Recursive invocations don't need to erase the cursor over and
1908 * over again, so we use fbcon_bmove_rec()
1910 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1911 p->vrows - p->yscroll);
1914 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1915 int dy, int dx, int height, int width, u_int y_break)
1917 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1918 struct fbcon_ops *ops = info->fbcon_par;
1921 if (sy < y_break && sy + height > y_break) {
1923 if (dy < sy) { /* Avoid trashing self */
1924 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1926 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1927 height - b, width, y_break);
1929 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1930 height - b, width, y_break);
1931 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1937 if (dy < y_break && dy + height > y_break) {
1939 if (dy < sy) { /* Avoid trashing self */
1940 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1942 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1943 height - b, width, y_break);
1945 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1946 height - b, width, y_break);
1947 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1952 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1956 static __inline__ void updatescrollmode(struct display *p,
1957 struct fb_info *info,
1960 struct fbcon_ops *ops = info->fbcon_par;
1961 int fh = vc->vc_font.height;
1962 int cap = info->flags;
1964 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1965 info->fix.xpanstep);
1966 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1967 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1968 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1969 info->var.xres_virtual);
1970 int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1971 divides(ypan, vc->vc_font.height) && vyres > yres;
1972 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1973 divides(ywrap, vc->vc_font.height) &&
1974 divides(vc->vc_font.height, vyres);
1975 int reading_fast = cap & FBINFO_READS_FAST;
1976 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1977 !(cap & FBINFO_HWACCEL_DISABLED);
1978 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1979 !(cap & FBINFO_HWACCEL_DISABLED);
1981 p->vrows = vyres/fh;
1982 if (yres > (fh * (vc->vc_rows + 1)))
1983 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1984 if ((yres % fh) && (vyres % fh < yres % fh))
1987 if (good_wrap || good_pan) {
1988 if (reading_fast || fast_copyarea)
1989 p->scrollmode = good_wrap ?
1990 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1992 p->scrollmode = good_wrap ? SCROLL_REDRAW :
1995 if (reading_fast || (fast_copyarea && !fast_imageblit))
1996 p->scrollmode = SCROLL_MOVE;
1998 p->scrollmode = SCROLL_REDRAW;
2002 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2003 unsigned int height)
2005 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2006 struct fbcon_ops *ops = info->fbcon_par;
2007 struct display *p = &fb_display[vc->vc_num];
2008 struct fb_var_screeninfo var = info->var;
2009 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2011 virt_w = FBCON_SWAP(ops->rotate, width, height);
2012 virt_h = FBCON_SWAP(ops->rotate, height, width);
2013 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2014 vc->vc_font.height);
2015 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2017 var.xres = virt_w * virt_fw;
2018 var.yres = virt_h * virt_fh;
2019 x_diff = info->var.xres - var.xres;
2020 y_diff = info->var.yres - var.yres;
2021 if (x_diff < 0 || x_diff > virt_fw ||
2022 y_diff < 0 || y_diff > virt_fh) {
2023 struct fb_videomode *mode;
2025 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2026 mode = fb_find_best_mode(&var, &info->modelist);
2029 display_to_var(&var, p);
2030 fb_videomode_to_var(&var, mode);
2032 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2035 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2036 if (CON_IS_VISIBLE(vc)) {
2037 var.activate = FB_ACTIVATE_NOW |
2039 fb_set_var(info, &var);
2041 var_to_display(p, &info->var, info);
2042 ops->var = info->var;
2044 updatescrollmode(p, info, vc);
2048 static int fbcon_switch(struct vc_data *vc)
2050 struct fb_info *info, *old_info = NULL;
2051 struct fbcon_ops *ops;
2052 struct display *p = &fb_display[vc->vc_num];
2053 struct fb_var_screeninfo var;
2054 int i, prev_console;
2056 info = registered_fb[con2fb_map[vc->vc_num]];
2057 ops = info->fbcon_par;
2061 fbcon_set_origin(vc);
2062 softback_top = softback_curr = softback_in = softback_buf;
2064 fbcon_update_softback(vc);
2067 if (logo_shown >= 0) {
2068 struct vc_data *conp2 = vc_cons[logo_shown].d;
2070 if (conp2->vc_top == logo_lines
2071 && conp2->vc_bottom == conp2->vc_rows)
2073 logo_shown = FBCON_LOGO_CANSHOW;
2076 prev_console = ops->currcon;
2077 if (prev_console != -1)
2078 old_info = registered_fb[con2fb_map[prev_console]];
2080 * FIXME: If we have multiple fbdev's loaded, we need to
2081 * update all info->currcon. Perhaps, we can place this
2082 * in a centralized structure, but this might break some
2085 * info->currcon = vc->vc_num;
2087 for (i = 0; i < FB_MAX; i++) {
2088 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2089 struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2091 o->currcon = vc->vc_num;
2094 memset(&var, 0, sizeof(struct fb_var_screeninfo));
2095 display_to_var(&var, p);
2096 var.activate = FB_ACTIVATE_NOW;
2099 * make sure we don't unnecessarily trip the memcmp()
2102 info->var.activate = var.activate;
2103 var.yoffset = info->var.yoffset;
2104 var.xoffset = info->var.xoffset;
2105 var.vmode = info->var.vmode;
2106 fb_set_var(info, &var);
2107 ops->var = info->var;
2109 if (old_info != NULL && old_info != info) {
2110 if (info->fbops->fb_set_par)
2111 info->fbops->fb_set_par(info);
2112 fbcon_del_cursor_timer(old_info);
2113 fbcon_add_cursor_timer(info);
2116 set_blitting_type(vc, info, p);
2117 ops->cursor_reset = 1;
2119 if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
2120 ops->rotate = FB_ROTATE_UR;
2121 set_blitting_type(vc, info, p);
2124 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2125 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2126 updatescrollmode(p, info, vc);
2128 switch (p->scrollmode) {
2129 case SCROLL_WRAP_MOVE:
2130 scrollback_phys_max = p->vrows - vc->vc_rows;
2132 case SCROLL_PAN_MOVE:
2133 case SCROLL_PAN_REDRAW:
2134 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2135 if (scrollback_phys_max < 0)
2136 scrollback_phys_max = 0;
2139 scrollback_phys_max = 0;
2144 scrollback_current = 0;
2145 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2146 ops->update_start(info);
2147 fbcon_set_palette(vc, color_table);
2148 fbcon_clear_margins(vc, 0);
2150 if (logo_shown == FBCON_LOGO_DRAW) {
2152 logo_shown = fg_console;
2153 /* This is protected above by initmem_freed */
2154 fb_show_logo(info, ops->rotate);
2156 vc->vc_origin + vc->vc_size_row * vc->vc_top,
2157 vc->vc_size_row * (vc->vc_bottom -
2164 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2168 unsigned short charmask = vc->vc_hi_font_mask ?
2170 unsigned short oldc;
2172 oldc = vc->vc_video_erase_char;
2173 vc->vc_video_erase_char &= charmask;
2174 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2175 vc->vc_video_erase_char = oldc;
2179 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2181 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2182 struct fbcon_ops *ops = info->fbcon_par;
2185 struct fb_var_screeninfo var = info->var;
2190 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2191 fb_set_var(info, &var);
2193 ops->var = info->var;
2197 if (!fbcon_is_inactive(vc, info)) {
2198 if (ops->blank_state != blank) {
2199 ops->blank_state = blank;
2200 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2201 ops->cursor_flash = (!blank);
2203 if (fb_blank(info, blank))
2204 fbcon_generic_blank(vc, info, blank);
2212 fbcon_add_cursor_timer(info);
2214 fbcon_del_cursor_timer(info);
2219 static void fbcon_free_font(struct display *p)
2221 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
2222 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
2227 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2229 u8 *fontdata = vc->vc_font.data;
2230 u8 *data = font->data;
2233 font->width = vc->vc_font.width;
2234 font->height = vc->vc_font.height;
2235 font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2239 if (font->width <= 8) {
2240 j = vc->vc_font.height;
2241 for (i = 0; i < font->charcount; i++) {
2242 memcpy(data, fontdata, j);
2243 memset(data + j, 0, 32 - j);
2247 } else if (font->width <= 16) {
2248 j = vc->vc_font.height * 2;
2249 for (i = 0; i < font->charcount; i++) {
2250 memcpy(data, fontdata, j);
2251 memset(data + j, 0, 64 - j);
2255 } else if (font->width <= 24) {
2256 for (i = 0; i < font->charcount; i++) {
2257 for (j = 0; j < vc->vc_font.height; j++) {
2258 *data++ = fontdata[0];
2259 *data++ = fontdata[1];
2260 *data++ = fontdata[2];
2261 fontdata += sizeof(u32);
2263 memset(data, 0, 3 * (32 - j));
2264 data += 3 * (32 - j);
2267 j = vc->vc_font.height * 4;
2268 for (i = 0; i < font->charcount; i++) {
2269 memcpy(data, fontdata, j);
2270 memset(data + j, 0, 128 - j);
2278 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2279 const u8 * data, int userfont)
2281 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2282 struct fbcon_ops *ops = info->fbcon_par;
2283 struct display *p = &fb_display[vc->vc_num];
2286 char *old_data = NULL;
2288 if (CON_IS_VISIBLE(vc) && softback_lines)
2289 fbcon_set_origin(vc);
2291 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2293 old_data = vc->vc_font.data;
2295 cnt = FNTCHARCNT(data);
2298 vc->vc_font.data = (void *)(p->fontdata = data);
2299 if ((p->userfont = userfont))
2301 vc->vc_font.width = w;
2302 vc->vc_font.height = h;
2303 if (vc->vc_hi_font_mask && cnt == 256) {
2304 vc->vc_hi_font_mask = 0;
2305 if (vc->vc_can_do_color) {
2306 vc->vc_complement_mask >>= 1;
2307 vc->vc_s_complement_mask >>= 1;
2310 /* ++Edmund: reorder the attribute bits */
2311 if (vc->vc_can_do_color) {
2312 unsigned short *cp =
2313 (unsigned short *) vc->vc_origin;
2314 int count = vc->vc_screenbuf_size / 2;
2316 for (; count > 0; count--, cp++) {
2318 scr_writew(((c & 0xfe00) >> 1) |
2321 c = vc->vc_video_erase_char;
2322 vc->vc_video_erase_char =
2323 ((c & 0xfe00) >> 1) | (c & 0xff);
2326 } else if (!vc->vc_hi_font_mask && cnt == 512) {
2327 vc->vc_hi_font_mask = 0x100;
2328 if (vc->vc_can_do_color) {
2329 vc->vc_complement_mask <<= 1;
2330 vc->vc_s_complement_mask <<= 1;
2333 /* ++Edmund: reorder the attribute bits */
2335 unsigned short *cp =
2336 (unsigned short *) vc->vc_origin;
2337 int count = vc->vc_screenbuf_size / 2;
2339 for (; count > 0; count--, cp++) {
2340 unsigned short newc;
2342 if (vc->vc_can_do_color)
2344 ((c & 0xff00) << 1) | (c &
2348 scr_writew(newc, cp);
2350 c = vc->vc_video_erase_char;
2351 if (vc->vc_can_do_color) {
2352 vc->vc_video_erase_char =
2353 ((c & 0xff00) << 1) | (c & 0xff);
2356 vc->vc_video_erase_char = c & ~0x100;
2364 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2365 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2368 vc_resize(vc, cols, rows);
2369 if (CON_IS_VISIBLE(vc) && softback_buf)
2370 fbcon_update_softback(vc);
2371 } else if (CON_IS_VISIBLE(vc)
2372 && vc->vc_mode == KD_TEXT) {
2373 fbcon_clear_margins(vc, 0);
2377 if (old_data && (--REFCOUNT(old_data) == 0))
2378 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2382 static int fbcon_copy_font(struct vc_data *vc, int con)
2384 struct display *od = &fb_display[con];
2385 struct console_font *f = &vc->vc_font;
2387 if (od->fontdata == f->data)
2388 return 0; /* already the same font... */
2389 return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2393 * User asked to set font; we are guaranteed that
2394 * a) width and height are in range 1..32
2395 * b) charcount does not exceed 512
2396 * but lets not assume that, since someone might someday want to use larger
2397 * fonts. And charcount of 512 is small for unicode support.
2399 * However, user space gives the font in 32 rows , regardless of
2400 * actual font height. So a new API is needed if support for larger fonts
2401 * is ever implemented.
2404 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2406 unsigned charcount = font->charcount;
2407 int w = font->width;
2408 int h = font->height;
2411 u8 *new_data, *data = font->data;
2412 int pitch = (font->width+7) >> 3;
2414 /* Is there a reason why fbconsole couldn't handle any charcount >256?
2415 * If not this check should be changed to charcount < 256 */
2416 if (charcount != 256 && charcount != 512)
2419 size = h * pitch * charcount;
2421 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2426 new_data += FONT_EXTRA_WORDS * sizeof(int);
2427 FNTSIZE(new_data) = size;
2428 FNTCHARCNT(new_data) = charcount;
2429 REFCOUNT(new_data) = 0; /* usage counter */
2430 for (i=0; i< charcount; i++) {
2431 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
2434 /* Since linux has a nice crc32 function use it for counting font
2436 csum = crc32(0, new_data, size);
2438 FNTSUM(new_data) = csum;
2439 /* Check if the same font is on some other console already */
2440 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2441 struct vc_data *tmp = vc_cons[i].d;
2443 if (fb_display[i].userfont &&
2444 fb_display[i].fontdata &&
2445 FNTSUM(fb_display[i].fontdata) == csum &&
2446 FNTSIZE(fb_display[i].fontdata) == size &&
2447 tmp->vc_font.width == w &&
2448 !memcmp(fb_display[i].fontdata, new_data, size)) {
2449 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2450 new_data = (u8 *)fb_display[i].fontdata;
2454 return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2457 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2459 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2460 const struct font_desc *f;
2463 f = get_default_font(info->var.xres, info->var.yres);
2464 else if (!(f = find_font(name)))
2467 font->width = f->width;
2468 font->height = f->height;
2469 return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2472 static u16 palette_red[16];
2473 static u16 palette_green[16];
2474 static u16 palette_blue[16];
2476 static struct fb_cmap palette_cmap = {
2477 0, 16, palette_red, palette_green, palette_blue, NULL
2480 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2482 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2486 if (fbcon_is_inactive(vc, info))
2489 if (!CON_IS_VISIBLE(vc))
2492 depth = fb_get_color_depth(&info->var, &info->fix);
2494 for (i = j = 0; i < 16; i++) {
2496 val = vc->vc_palette[j++];
2497 palette_red[k] = (val << 8) | val;
2498 val = vc->vc_palette[j++];
2499 palette_green[k] = (val << 8) | val;
2500 val = vc->vc_palette[j++];
2501 palette_blue[k] = (val << 8) | val;
2503 palette_cmap.len = 16;
2504 palette_cmap.start = 0;
2506 * If framebuffer is capable of less than 16 colors,
2507 * use default palette of fbcon.
2510 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2512 return fb_set_cmap(&palette_cmap, info);
2515 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2520 if (vc->vc_num != fg_console || !softback_lines)
2521 return (u16 *) (vc->vc_origin + offset);
2522 line = offset / vc->vc_size_row;
2523 if (line >= softback_lines)
2524 return (u16 *) (vc->vc_origin + offset -
2525 softback_lines * vc->vc_size_row);
2526 p = softback_curr + offset;
2527 if (p >= softback_end)
2528 p += softback_buf - softback_end;
2532 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2538 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2539 unsigned long offset = (pos - vc->vc_origin) / 2;
2541 x = offset % vc->vc_cols;
2542 y = offset / vc->vc_cols;
2543 if (vc->vc_num == fg_console)
2544 y += softback_lines;
2545 ret = pos + (vc->vc_cols - x) * 2;
2546 } else if (vc->vc_num == fg_console && softback_lines) {
2547 unsigned long offset = pos - softback_curr;
2549 if (pos < softback_curr)
2550 offset += softback_end - softback_buf;
2552 x = offset % vc->vc_cols;
2553 y = offset / vc->vc_cols;
2554 ret = pos + (vc->vc_cols - x) * 2;
2555 if (ret == softback_end)
2557 if (ret == softback_in)
2558 ret = vc->vc_origin;
2560 /* Should not happen */
2562 ret = vc->vc_origin;
2571 /* As we might be inside of softback, we may work with non-contiguous buffer,
2572 that's why we have to use a separate routine. */
2573 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2576 u16 a = scr_readw(p);
2577 if (!vc->vc_can_do_color)
2579 else if (vc->vc_hi_font_mask == 0x100)
2580 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2581 (((a) & 0x0e00) << 4);
2583 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2584 (((a) & 0x0700) << 4);
2586 if (p == (u16 *) softback_end)
2587 p = (u16 *) softback_buf;
2588 if (p == (u16 *) softback_in)
2589 p = (u16 *) vc->vc_origin;
2593 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2595 struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2596 struct fbcon_ops *ops = info->fbcon_par;
2597 struct display *p = &fb_display[fg_console];
2598 int offset, limit, scrollback_old;
2601 if (vc->vc_num != fg_console)
2603 if (vc->vc_mode != KD_TEXT || !lines)
2605 if (logo_shown >= 0) {
2606 struct vc_data *conp2 = vc_cons[logo_shown].d;
2608 if (conp2->vc_top == logo_lines
2609 && conp2->vc_bottom == conp2->vc_rows)
2611 if (logo_shown == vc->vc_num) {
2617 logo_lines * vc->vc_size_row;
2618 for (i = 0; i < logo_lines; i++) {
2619 if (p == softback_top)
2621 if (p == softback_buf)
2623 p -= vc->vc_size_row;
2624 q -= vc->vc_size_row;
2625 scr_memcpyw((u16 *) q, (u16 *) p,
2629 update_region(vc, vc->vc_origin,
2630 logo_lines * vc->vc_cols);
2632 logo_shown = FBCON_LOGO_CANSHOW;
2634 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2635 fbcon_redraw_softback(vc, p, lines);
2636 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2640 if (!scrollback_phys_max)
2643 scrollback_old = scrollback_current;
2644 scrollback_current -= lines;
2645 if (scrollback_current < 0)
2646 scrollback_current = 0;
2647 else if (scrollback_current > scrollback_max)
2648 scrollback_current = scrollback_max;
2649 if (scrollback_current == scrollback_old)
2652 if (fbcon_is_inactive(vc, info))
2655 fbcon_cursor(vc, CM_ERASE);
2657 offset = p->yscroll - scrollback_current;
2659 switch (p->scrollmode) {
2660 case SCROLL_WRAP_MOVE:
2661 info->var.vmode |= FB_VMODE_YWRAP;
2663 case SCROLL_PAN_MOVE:
2664 case SCROLL_PAN_REDRAW:
2665 limit -= vc->vc_rows;
2666 info->var.vmode &= ~FB_VMODE_YWRAP;
2671 else if (offset >= limit)
2674 ops->var.xoffset = 0;
2675 ops->var.yoffset = offset * vc->vc_font.height;
2676 ops->update_start(info);
2678 if (!scrollback_current)
2679 fbcon_cursor(vc, CM_DRAW);
2683 static int fbcon_set_origin(struct vc_data *vc)
2686 fbcon_scrolldelta(vc, softback_lines);
2690 static void fbcon_suspended(struct fb_info *info)
2692 struct vc_data *vc = NULL;
2693 struct fbcon_ops *ops = info->fbcon_par;
2695 if (!ops || ops->currcon < 0)
2697 vc = vc_cons[ops->currcon].d;
2699 /* Clear cursor, restore saved data */
2700 fbcon_cursor(vc, CM_ERASE);
2703 static void fbcon_resumed(struct fb_info *info)
2706 struct fbcon_ops *ops = info->fbcon_par;
2708 if (!ops || ops->currcon < 0)
2710 vc = vc_cons[ops->currcon].d;
2715 static void fbcon_modechanged(struct fb_info *info)
2717 struct fbcon_ops *ops = info->fbcon_par;
2722 if (!ops || ops->currcon < 0)
2724 vc = vc_cons[ops->currcon].d;
2725 if (vc->vc_mode != KD_TEXT ||
2726 registered_fb[con2fb_map[ops->currcon]] != info)
2729 p = &fb_display[vc->vc_num];
2730 set_blitting_type(vc, info, p);
2732 if (CON_IS_VISIBLE(vc)) {
2733 var_to_display(p, &info->var, info);
2734 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2735 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2736 cols /= vc->vc_font.width;
2737 rows /= vc->vc_font.height;
2738 vc_resize(vc, cols, rows);
2739 updatescrollmode(p, info, vc);
2741 scrollback_current = 0;
2742 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2743 ops->update_start(info);
2744 fbcon_set_palette(vc, color_table);
2747 fbcon_update_softback(vc);
2751 static void fbcon_set_all_vcs(struct fb_info *info)
2753 struct fbcon_ops *ops = info->fbcon_par;
2758 if (!ops || ops->currcon < 0)
2761 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2763 if (!vc || vc->vc_mode != KD_TEXT ||
2764 registered_fb[con2fb_map[i]] != info)
2767 p = &fb_display[vc->vc_num];
2768 set_blitting_type(vc, info, p);
2769 var_to_display(p, &info->var, info);
2770 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2771 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2772 cols /= vc->vc_font.width;
2773 rows /= vc->vc_font.height;
2774 vc_resize(vc, cols, rows);
2776 if (CON_IS_VISIBLE(vc)) {
2777 updatescrollmode(p, info, vc);
2779 scrollback_current = 0;
2780 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2781 ops->update_start(info);
2782 fbcon_set_palette(vc, color_table);
2785 fbcon_update_softback(vc);
2790 static int fbcon_mode_deleted(struct fb_info *info,
2791 struct fb_videomode *mode)
2793 struct fb_info *fb_info;
2795 int i, j, found = 0;
2797 /* before deletion, ensure that mode is not in use */
2798 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2802 fb_info = registered_fb[j];
2803 if (fb_info != info)
2808 if (fb_mode_is_equal(p->mode, mode)) {
2816 static int fbcon_fb_registered(int idx)
2820 if (info_idx == -1) {
2821 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2822 if (con2fb_map_boot[i] == idx) {
2828 ret = fbcon_takeover(1);
2830 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2831 if (con2fb_map_boot[i] == idx)
2832 set_con2fb_map(i, idx, 0);
2839 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2841 struct fbcon_ops *ops = info->fbcon_par;
2844 if (!ops || ops->currcon < 0)
2847 vc = vc_cons[ops->currcon].d;
2848 if (vc->vc_mode != KD_TEXT ||
2849 registered_fb[con2fb_map[ops->currcon]] != info)
2852 if (CON_IS_VISIBLE(vc)) {
2856 do_unblank_screen(0);
2858 ops->blank_state = blank;
2861 static void fbcon_new_modelist(struct fb_info *info)
2865 struct fb_var_screeninfo var;
2866 struct fb_videomode *mode;
2868 for (i = 0; i < MAX_NR_CONSOLES; i++) {
2869 if (registered_fb[con2fb_map[i]] != info)
2871 if (!fb_display[i].mode)
2874 display_to_var(&var, &fb_display[i]);
2875 mode = fb_find_nearest_mode(fb_display[i].mode,
2877 fb_videomode_to_var(&var, mode);
2880 fbcon_set_disp(info, &var, vc);
2882 fbcon_preset_disp(info, &var, i);
2887 static int fbcon_event_notify(struct notifier_block *self,
2888 unsigned long action, void *data)
2890 struct fb_event *event = data;
2891 struct fb_info *info = event->info;
2892 struct fb_videomode *mode;
2893 struct fb_con2fbmap *con2fb;
2897 case FB_EVENT_SUSPEND:
2898 fbcon_suspended(info);
2900 case FB_EVENT_RESUME:
2901 fbcon_resumed(info);
2903 case FB_EVENT_MODE_CHANGE:
2904 fbcon_modechanged(info);
2906 case FB_EVENT_MODE_CHANGE_ALL:
2907 fbcon_set_all_vcs(info);
2909 case FB_EVENT_MODE_DELETE:
2911 ret = fbcon_mode_deleted(info, mode);
2913 case FB_EVENT_FB_REGISTERED:
2914 ret = fbcon_fb_registered(info->node);
2916 case FB_EVENT_SET_CONSOLE_MAP:
2917 con2fb = event->data;
2918 ret = set_con2fb_map(con2fb->console - 1,
2919 con2fb->framebuffer, 1);
2921 case FB_EVENT_GET_CONSOLE_MAP:
2922 con2fb = event->data;
2923 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
2925 case FB_EVENT_BLANK:
2926 fbcon_fb_blanked(info, *(int *)event->data);
2928 case FB_EVENT_NEW_MODELIST:
2929 fbcon_new_modelist(info);
2931 case FB_EVENT_SET_CON_ROTATE:
2932 fbcon_rotate(info, *(int *)event->data);
2934 case FB_EVENT_GET_CON_ROTATE:
2935 ret = fbcon_get_rotate(info);
2937 case FB_EVENT_SET_CON_ROTATE_ALL:
2938 fbcon_rotate_all(info, *(int *)event->data);
2945 * The console `switch' structure for the frame buffer based console
2948 static const struct consw fb_con = {
2949 .owner = THIS_MODULE,
2950 .con_startup = fbcon_startup,
2951 .con_init = fbcon_init,
2952 .con_deinit = fbcon_deinit,
2953 .con_clear = fbcon_clear,
2954 .con_putc = fbcon_putc,
2955 .con_putcs = fbcon_putcs,
2956 .con_cursor = fbcon_cursor,
2957 .con_scroll = fbcon_scroll,
2958 .con_bmove = fbcon_bmove,
2959 .con_switch = fbcon_switch,
2960 .con_blank = fbcon_blank,
2961 .con_font_set = fbcon_set_font,
2962 .con_font_get = fbcon_get_font,
2963 .con_font_default = fbcon_set_def_font,
2964 .con_font_copy = fbcon_copy_font,
2965 .con_set_palette = fbcon_set_palette,
2966 .con_scrolldelta = fbcon_scrolldelta,
2967 .con_set_origin = fbcon_set_origin,
2968 .con_invert_region = fbcon_invert_region,
2969 .con_screen_pos = fbcon_screen_pos,
2970 .con_getxy = fbcon_getxy,
2971 .con_resize = fbcon_resize,
2974 static struct notifier_block fbcon_event_notifier = {
2975 .notifier_call = fbcon_event_notify,
2978 static int __init fb_console_init(void)
2982 acquire_console_sem();
2983 fb_register_client(&fbcon_event_notifier);
2984 release_console_sem();
2986 for (i = 0; i < MAX_NR_CONSOLES; i++)
2989 if (num_registered_fb) {
2990 for (i = 0; i < FB_MAX; i++) {
2991 if (registered_fb[i] != NULL) {
3002 module_init(fb_console_init);
3006 static void __exit fb_console_exit(void)
3008 acquire_console_sem();
3009 fb_unregister_client(&fbcon_event_notifier);
3010 release_console_sem();
3011 give_up_console(&fb_con);
3014 module_exit(fb_console_exit);
3018 MODULE_LICENSE("GPL");