2 * sisusb - usb kernel driver for SiS315(E) based USB2VGA dongles
4 * VGA text mode console part
6 * Copyright (C) 2005 by Thomas Winischhofer, Vienna, Austria
8 * If distributed as part of the Linux kernel, this code is licensed under the
11 * Otherwise, the following license terms apply:
13 * * Redistribution and use in source and binary forms, with or without
14 * * modification, are permitted provided that the following conditions
16 * * 1) Redistributions of source code must retain the above copyright
17 * * notice, this list of conditions and the following disclaimer.
18 * * 2) Redistributions in binary form must reproduce the above copyright
19 * * notice, this list of conditions and the following disclaimer in the
20 * * documentation and/or other materials provided with the distribution.
21 * * 3) The name of the author may not be used to endorse or promote products
22 * * derived from this software without specific psisusbr written permission.
24 * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESSED OR
25 * * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * Author: Thomas Winischhofer <thomas@winischhofer.net>
37 * Portions based on vgacon.c which are
38 * Created 28 Sep 1997 by Geert Uytterhoeven
39 * Rewritten by Martin Mares <mj@ucw.cz>, July 1998
40 * based on code Copyright (C) 1991, 1992 Linus Torvalds
43 * A note on using in_atomic() in here: We can't handle console
44 * calls from non-schedulable context due to our USB-dependend
45 * nature. For now, this driver just ignores any calls if it
50 #include <linux/mutex.h>
51 #include <linux/module.h>
52 #include <linux/kernel.h>
53 #include <linux/signal.h>
55 #include <linux/usb.h>
56 #include <linux/tty.h>
57 #include <linux/console.h>
58 #include <linux/string.h>
60 #include <linux/init.h>
61 #include <linux/slab.h>
62 #include <linux/vt_kern.h>
63 #include <linux/selection.h>
64 #include <linux/spinlock.h>
65 #include <linux/kref.h>
66 #include <linux/ioport.h>
67 #include <linux/interrupt.h>
68 #include <linux/vmalloc.h>
71 #include "sisusb_init.h"
73 #ifdef INCL_SISUSB_CON
75 #define sisusbcon_writew(val, addr) (*(addr) = (val))
76 #define sisusbcon_readw(addr) (*(addr))
77 #define sisusbcon_memmovew(d, s, c) memmove(d, s, c)
78 #define sisusbcon_memcpyw(d, s, c) memcpy(d, s, c)
80 /* vc_data -> sisusb conversion table */
81 static struct sisusb_usb_data *mysisusbs[MAX_NR_CONSOLES];
83 /* Forward declaration */
84 static const struct consw sisusb_con;
87 sisusbcon_memsetw(u16 *s, u16 c, unsigned int count)
91 sisusbcon_writew(c, s++);
95 sisusb_initialize(struct sisusb_usb_data *sisusb)
97 /* Reset cursor and start address */
98 if (sisusb_setidxreg(sisusb, SISCR, 0x0c, 0x00))
100 if (sisusb_setidxreg(sisusb, SISCR, 0x0d, 0x00))
102 if (sisusb_setidxreg(sisusb, SISCR, 0x0e, 0x00))
104 sisusb_setidxreg(sisusb, SISCR, 0x0f, 0x00);
108 sisusbcon_set_start_address(struct sisusb_usb_data *sisusb, struct vc_data *c)
110 sisusb->cur_start_addr = (c->vc_visible_origin - sisusb->scrbuf) / 2;
112 sisusb_setidxreg(sisusb, SISCR, 0x0c, (sisusb->cur_start_addr >> 8));
113 sisusb_setidxreg(sisusb, SISCR, 0x0d, (sisusb->cur_start_addr & 0xff));
117 sisusb_set_cursor(struct sisusb_usb_data *sisusb, unsigned int location)
119 if (sisusb->sisusb_cursor_loc == location)
122 sisusb->sisusb_cursor_loc = location;
124 /* Hardware bug: Text cursor appears twice or not at all
125 * at some positions. Work around it with the cursor skew
129 if ((location & 0x0007) == 0x0007) {
130 sisusb->bad_cursor_pos = 1;
132 if (sisusb_setidxregandor(sisusb, SISCR, 0x0b, 0x1f, 0x20))
134 } else if (sisusb->bad_cursor_pos) {
135 if (sisusb_setidxregand(sisusb, SISCR, 0x0b, 0x1f))
137 sisusb->bad_cursor_pos = 0;
140 if (sisusb_setidxreg(sisusb, SISCR, 0x0e, (location >> 8)))
142 sisusb_setidxreg(sisusb, SISCR, 0x0f, (location & 0xff));
145 static inline struct sisusb_usb_data *
146 sisusb_get_sisusb(unsigned short console)
148 return mysisusbs[console];
152 sisusb_sisusb_valid(struct sisusb_usb_data *sisusb)
154 if (!sisusb->present || !sisusb->ready || !sisusb->sisusb_dev)
160 static struct sisusb_usb_data *
161 sisusb_get_sisusb_lock_and_check(unsigned short console)
163 struct sisusb_usb_data *sisusb;
165 /* We can't handle console calls in non-schedulable
166 * context due to our locks and the USB transport.
167 * So we simply ignore them. This should only affect
168 * some calls to printk.
173 if (!(sisusb = sisusb_get_sisusb(console)))
176 mutex_lock(&sisusb->lock);
178 if (!sisusb_sisusb_valid(sisusb) ||
179 !sisusb->havethisconsole[console]) {
180 mutex_unlock(&sisusb->lock);
188 sisusb_is_inactive(struct vc_data *c, struct sisusb_usb_data *sisusb)
190 if (sisusb->is_gfx ||
191 sisusb->textmodedestroyed ||
192 c->vc_mode != KD_TEXT)
198 /* con_startup console interface routine */
200 sisusbcon_startup(void)
205 /* con_init console interface routine */
207 sisusbcon_init(struct vc_data *c, int init)
209 struct sisusb_usb_data *sisusb;
212 /* This is called by take_over_console(),
213 * ie by us/under our control. It is
214 * only called after text mode and fonts
215 * are set up/restored.
218 if (!(sisusb = sisusb_get_sisusb(c->vc_num)))
221 mutex_lock(&sisusb->lock);
223 if (!sisusb_sisusb_valid(sisusb)) {
224 mutex_unlock(&sisusb->lock);
228 c->vc_can_do_color = 1;
230 c->vc_complement_mask = 0x7700;
232 c->vc_hi_font_mask = sisusb->current_font_512 ? 0x0800 : 0;
234 sisusb->haveconsole = 1;
236 sisusb->havethisconsole[c->vc_num] = 1;
238 /* We only support 640x400 */
239 c->vc_scan_lines = 400;
241 c->vc_font.height = sisusb->current_font_height;
243 /* We only support width = 8 */
245 rows = c->vc_scan_lines / c->vc_font.height;
247 /* Increment usage count for our sisusb.
248 * Doing so saves us from upping/downing
249 * the disconnect semaphore; we can't
250 * lose our sisusb until this is undone
251 * in con_deinit. For all other console
252 * interface functions, it suffices to
253 * use sisusb->lock and do a quick check
254 * of sisusb for device disconnection.
256 kref_get(&sisusb->kref);
258 if (!*c->vc_uni_pagedir_loc)
259 con_set_default_unimap(c);
261 mutex_unlock(&sisusb->lock);
267 vc_resize(c, cols, rows);
270 /* con_deinit console interface routine */
272 sisusbcon_deinit(struct vc_data *c)
274 struct sisusb_usb_data *sisusb;
277 /* This is called by take_over_console()
278 * and others, ie not under our control.
281 if (!(sisusb = sisusb_get_sisusb(c->vc_num)))
284 mutex_lock(&sisusb->lock);
286 /* Clear ourselves in mysisusbs */
287 mysisusbs[c->vc_num] = NULL;
289 sisusb->havethisconsole[c->vc_num] = 0;
291 /* Free our font buffer if all consoles are gone */
292 if (sisusb->font_backup) {
293 for(i = 0; i < MAX_NR_CONSOLES; i++) {
294 if (sisusb->havethisconsole[c->vc_num])
297 if (i == MAX_NR_CONSOLES) {
298 vfree(sisusb->font_backup);
299 sisusb->font_backup = NULL;
303 mutex_unlock(&sisusb->lock);
305 /* decrement the usage count on our sisusb */
306 kref_put(&sisusb->kref, sisusb_delete);
309 /* interface routine */
311 sisusbcon_build_attr(struct vc_data *c, u8 color, u8 intensity,
312 u8 blink, u8 underline, u8 reverse, u8 unused)
317 attr = (attr & 0xf0) | c->vc_ulcolor;
318 else if (intensity == 0)
319 attr = (attr & 0xf0) | c->vc_halfcolor;
322 attr = ((attr) & 0x88) |
324 ((attr) << 4)) & 0x77);
335 /* Interface routine */
337 sisusbcon_invert_region(struct vc_data *vc, u16 *p, int count)
339 /* Invert a region. This is called with a pointer
340 * to the console's internal screen buffer. So we
341 * simply do the inversion there and rely on
342 * a call to putc(s) to update the real screen.
346 u16 a = sisusbcon_readw(p);
349 (((a) & 0x7000) >> 4) |
350 (((a) & 0x0700) << 4);
352 sisusbcon_writew(a, p++);
356 #define SISUSB_VADDR(x,y) \
357 ((u16 *)c->vc_origin + \
358 (y) * sisusb->sisusb_num_columns + \
361 #define SISUSB_HADDR(x,y) \
362 ((u16 *)(sisusb->vrambase + (c->vc_origin - sisusb->scrbuf)) + \
363 (y) * sisusb->sisusb_num_columns + \
366 /* Interface routine */
368 sisusbcon_putc(struct vc_data *c, int ch, int y, int x)
370 struct sisusb_usb_data *sisusb;
373 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
376 /* sisusb->lock is down */
377 if (sisusb_is_inactive(c, sisusb)) {
378 mutex_unlock(&sisusb->lock);
383 sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(x, y),
384 (long)SISUSB_HADDR(x, y), 2, &written);
386 mutex_unlock(&sisusb->lock);
389 /* Interface routine */
391 sisusbcon_putcs(struct vc_data *c, const unsigned short *s,
392 int count, int y, int x)
394 struct sisusb_usb_data *sisusb;
399 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
402 /* sisusb->lock is down */
404 /* Need to put the characters into the buffer ourselves,
405 * because the vt does this AFTER calling us.
408 dest = SISUSB_VADDR(x, y);
410 for (i = count; i > 0; i--)
411 sisusbcon_writew(sisusbcon_readw(s++), dest++);
413 if (sisusb_is_inactive(c, sisusb)) {
414 mutex_unlock(&sisusb->lock);
418 sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(x, y),
419 (long)SISUSB_HADDR(x, y), count * 2, &written);
421 mutex_unlock(&sisusb->lock);
424 /* Interface routine */
426 sisusbcon_clear(struct vc_data *c, int y, int x, int height, int width)
428 struct sisusb_usb_data *sisusb;
429 u16 eattr = c->vc_video_erase_char;
434 if (width <= 0 || height <= 0)
437 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
440 /* sisusb->lock is down */
442 /* Need to clear buffer ourselves, because the vt does
443 * this AFTER calling us.
446 dest = SISUSB_VADDR(x, y);
448 cols = sisusb->sisusb_num_columns;
453 if (x == 0 && width >= c->vc_cols) {
455 sisusbcon_memsetw(dest, eattr, height * cols * 2);
459 for (i = height; i > 0; i--, dest += cols)
460 sisusbcon_memsetw(dest, eattr, width * 2);
464 if (sisusb_is_inactive(c, sisusb)) {
465 mutex_unlock(&sisusb->lock);
469 length = ((height * cols) - x - (cols - width - x)) * 2;
472 sisusb_copy_memory(sisusb, (unsigned char *)SISUSB_VADDR(x, y),
473 (long)SISUSB_HADDR(x, y), length, &written);
475 mutex_unlock(&sisusb->lock);
478 /* Interface routine */
480 sisusbcon_bmove(struct vc_data *c, int sy, int sx,
481 int dy, int dx, int height, int width)
483 struct sisusb_usb_data *sisusb;
487 if (width <= 0 || height <= 0)
490 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
493 /* sisusb->lock is down */
495 cols = sisusb->sisusb_num_columns;
497 if (sisusb_is_inactive(c, sisusb)) {
498 mutex_unlock(&sisusb->lock);
502 length = ((height * cols) - dx - (cols - width - dx)) * 2;
505 sisusb_copy_memory(sisusb, (unsigned char *)SISUSB_VADDR(dx, dy),
506 (long)SISUSB_HADDR(dx, dy), length, &written);
508 mutex_unlock(&sisusb->lock);
511 /* interface routine */
513 sisusbcon_switch(struct vc_data *c)
515 struct sisusb_usb_data *sisusb;
519 /* Returnvalue 0 means we have fully restored screen,
520 * and vt doesn't need to call do_update_region().
521 * Returnvalue != 0 naturally means the opposite.
524 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
527 /* sisusb->lock is down */
529 /* Don't write to screen if in gfx mode */
530 if (sisusb_is_inactive(c, sisusb)) {
531 mutex_unlock(&sisusb->lock);
535 /* That really should not happen. It would mean we are
536 * being called while the vc is using its private buffer
539 if (c->vc_origin == (unsigned long)c->vc_screenbuf) {
540 mutex_unlock(&sisusb->lock);
541 dev_dbg(&sisusb->sisusb_dev->dev, "ASSERT ORIGIN != SCREENBUF!\n");
545 /* Check that we don't copy too much */
546 length = min((int)c->vc_screenbuf_size,
547 (int)(sisusb->scrbuf + sisusb->scrbuf_size - c->vc_origin));
549 /* Restore the screen contents */
550 sisusbcon_memcpyw((u16 *)c->vc_origin, (u16 *)c->vc_screenbuf,
553 sisusb_copy_memory(sisusb, (unsigned char *)c->vc_origin,
554 (long)SISUSB_HADDR(0, 0),
557 mutex_unlock(&sisusb->lock);
562 /* interface routine */
564 sisusbcon_save_screen(struct vc_data *c)
566 struct sisusb_usb_data *sisusb;
569 /* Save the current screen contents to vc's private
573 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
576 /* sisusb->lock is down */
578 if (sisusb_is_inactive(c, sisusb)) {
579 mutex_unlock(&sisusb->lock);
583 /* Check that we don't copy too much */
584 length = min((int)c->vc_screenbuf_size,
585 (int)(sisusb->scrbuf + sisusb->scrbuf_size - c->vc_origin));
587 /* Save the screen contents to vc's private buffer */
588 sisusbcon_memcpyw((u16 *)c->vc_screenbuf, (u16 *)c->vc_origin,
591 mutex_unlock(&sisusb->lock);
594 /* interface routine */
596 sisusbcon_set_palette(struct vc_data *c, unsigned char *table)
598 struct sisusb_usb_data *sisusb;
601 /* Return value not used by vt */
603 if (!CON_IS_VISIBLE(c))
606 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
609 /* sisusb->lock is down */
611 if (sisusb_is_inactive(c, sisusb)) {
612 mutex_unlock(&sisusb->lock);
616 for (i = j = 0; i < 16; i++) {
617 if (sisusb_setreg(sisusb, SISCOLIDX, table[i]))
619 if (sisusb_setreg(sisusb, SISCOLDATA, c->vc_palette[j++] >> 2))
621 if (sisusb_setreg(sisusb, SISCOLDATA, c->vc_palette[j++] >> 2))
623 if (sisusb_setreg(sisusb, SISCOLDATA, c->vc_palette[j++] >> 2))
627 mutex_unlock(&sisusb->lock);
632 /* interface routine */
634 sisusbcon_blank(struct vc_data *c, int blank, int mode_switch)
636 struct sisusb_usb_data *sisusb;
637 u8 sr1, cr17, pmreg, cr63;
641 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
644 /* sisusb->lock is down */
647 sisusb->is_gfx = blank ? 1 : 0;
649 if (sisusb_is_inactive(c, sisusb)) {
650 mutex_unlock(&sisusb->lock);
656 case 1: /* Normal blanking: Clear screen */
658 sisusbcon_memsetw((u16 *)c->vc_origin,
659 c->vc_video_erase_char,
660 c->vc_screenbuf_size);
661 sisusb_copy_memory(sisusb,
662 (unsigned char *)c->vc_origin,
663 (u32)(sisusb->vrambase +
664 (c->vc_origin - sisusb->scrbuf)),
665 c->vc_screenbuf_size, &written);
666 sisusb->con_blanked = 1;
670 default: /* VESA blanking */
672 case 0: /* Unblank */
678 sisusb->con_blanked = 0;
680 case VESA_VSYNC_SUSPEND + 1:
686 case VESA_HSYNC_SUSPEND + 1:
692 case VESA_POWERDOWN + 1:
699 mutex_unlock(&sisusb->lock);
703 sisusb_setidxregandor(sisusb, SISSR, 0x01, ~0x20, sr1);
704 sisusb_setidxregandor(sisusb, SISCR, 0x17, 0x7f, cr17);
705 sisusb_setidxregandor(sisusb, SISSR, 0x1f, 0x3f, pmreg);
706 sisusb_setidxregandor(sisusb, SISCR, 0x63, 0xbf, cr63);
710 mutex_unlock(&sisusb->lock);
715 /* interface routine */
717 sisusbcon_scrolldelta(struct vc_data *c, int lines)
719 struct sisusb_usb_data *sisusb;
720 int margin = c->vc_size_row * 4;
723 /* The return value does not seem to be used */
725 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
728 /* sisusb->lock is down */
730 if (sisusb_is_inactive(c, sisusb)) {
731 mutex_unlock(&sisusb->lock);
735 if (!lines) /* Turn scrollback off */
736 c->vc_visible_origin = c->vc_origin;
739 if (sisusb->con_rolled_over >
740 (c->vc_scr_end - sisusb->scrbuf) + margin) {
742 ul = c->vc_scr_end - sisusb->scrbuf;
743 we = sisusb->con_rolled_over + c->vc_size_row;
748 we = sisusb->scrbuf_size;
752 p = (c->vc_visible_origin - sisusb->scrbuf - ul + we) % we +
753 lines * c->vc_size_row;
755 st = (c->vc_origin - sisusb->scrbuf - ul + we) % we;
766 c->vc_visible_origin = sisusb->scrbuf + (p + ul) % we;
769 sisusbcon_set_start_address(sisusb, c);
771 mutex_unlock(&sisusb->lock);
776 /* Interface routine */
778 sisusbcon_cursor(struct vc_data *c, int mode)
780 struct sisusb_usb_data *sisusb;
781 int from, to, baseline;
783 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
786 /* sisusb->lock is down */
788 if (sisusb_is_inactive(c, sisusb)) {
789 mutex_unlock(&sisusb->lock);
793 if (c->vc_origin != c->vc_visible_origin) {
794 c->vc_visible_origin = c->vc_origin;
795 sisusbcon_set_start_address(sisusb, c);
798 if (mode == CM_ERASE) {
799 sisusb_setidxregor(sisusb, SISCR, 0x0a, 0x20);
800 sisusb->sisusb_cursor_size_to = -1;
801 mutex_unlock(&sisusb->lock);
805 sisusb_set_cursor(sisusb, (c->vc_pos - sisusb->scrbuf) / 2);
807 baseline = c->vc_font.height - (c->vc_font.height < 10 ? 1 : 2);
809 switch (c->vc_cursor_type & 0x0f) {
810 case CUR_BLOCK: from = 1;
811 to = c->vc_font.height;
813 case CUR_TWO_THIRDS: from = c->vc_font.height / 3;
816 case CUR_LOWER_HALF: from = c->vc_font.height / 2;
819 case CUR_LOWER_THIRD: from = (c->vc_font.height * 2) / 3;
822 case CUR_NONE: from = 31;
826 case CUR_UNDERLINE: from = baseline - 1;
831 if (sisusb->sisusb_cursor_size_from != from ||
832 sisusb->sisusb_cursor_size_to != to) {
834 sisusb_setidxreg(sisusb, SISCR, 0x0a, from);
835 sisusb_setidxregandor(sisusb, SISCR, 0x0b, 0xe0, to);
837 sisusb->sisusb_cursor_size_from = from;
838 sisusb->sisusb_cursor_size_to = to;
841 mutex_unlock(&sisusb->lock);
845 sisusbcon_scroll_area(struct vc_data *c, struct sisusb_usb_data *sisusb,
846 int t, int b, int dir, int lines)
848 int cols = sisusb->sisusb_num_columns;
849 int length = ((b - t) * cols) * 2;
850 u16 eattr = c->vc_video_erase_char;
853 /* sisusb->lock is down */
855 /* Scroll an area which does not match the
856 * visible screen's dimensions. This needs
857 * to be done separately, as it does not
858 * use hardware panning.
864 sisusbcon_memmovew(SISUSB_VADDR(0, t),
865 SISUSB_VADDR(0, t + lines),
866 (b - t - lines) * cols * 2);
867 sisusbcon_memsetw(SISUSB_VADDR(0, b - lines), eattr,
872 sisusbcon_memmovew(SISUSB_VADDR(0, t + lines),
874 (b - t - lines) * cols * 2);
875 sisusbcon_memsetw(SISUSB_VADDR(0, t), eattr,
880 sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(0, t),
881 (long)SISUSB_HADDR(0, t), length, &written);
883 mutex_unlock(&sisusb->lock);
888 /* Interface routine */
890 sisusbcon_scroll(struct vc_data *c, int t, int b, int dir, int lines)
892 struct sisusb_usb_data *sisusb;
893 u16 eattr = c->vc_video_erase_char;
896 unsigned long oldorigin;
897 unsigned int delta = lines * c->vc_size_row;
900 /* Returning != 0 means we have done the scrolling successfully.
901 * Returning 0 makes vt do the scrolling on its own.
902 * Note that con_scroll is only called if the console is
903 * visible. In that case, the origin should be our buffer,
904 * not the vt's private one.
910 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
913 /* sisusb->lock is down */
915 if (sisusb_is_inactive(c, sisusb)) {
916 mutex_unlock(&sisusb->lock);
921 if (t || b != c->vc_rows)
922 return sisusbcon_scroll_area(c, sisusb, t, b, dir, lines);
924 if (c->vc_origin != c->vc_visible_origin) {
925 c->vc_visible_origin = c->vc_origin;
926 sisusbcon_set_start_address(sisusb, c);
929 /* limit amount to maximum realistic size */
930 if (lines > c->vc_rows)
933 oldorigin = c->vc_origin;
939 if (c->vc_scr_end + delta >=
940 sisusb->scrbuf + sisusb->scrbuf_size) {
941 sisusbcon_memcpyw((u16 *)sisusb->scrbuf,
942 (u16 *)(oldorigin + delta),
943 c->vc_screenbuf_size - delta);
944 c->vc_origin = sisusb->scrbuf;
945 sisusb->con_rolled_over = oldorigin - sisusb->scrbuf;
948 c->vc_origin += delta;
951 (u16 *)(c->vc_origin + c->vc_screenbuf_size - delta),
958 if (oldorigin - delta < sisusb->scrbuf) {
959 sisusbcon_memmovew((u16 *)(sisusb->scrbuf +
960 sisusb->scrbuf_size -
961 c->vc_screenbuf_size +
964 c->vc_screenbuf_size - delta);
965 c->vc_origin = sisusb->scrbuf +
966 sisusb->scrbuf_size -
967 c->vc_screenbuf_size;
968 sisusb->con_rolled_over = 0;
971 c->vc_origin -= delta;
973 c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
975 scr_memsetw((u16 *)(c->vc_origin), eattr, delta);
980 originoffset = (u32)(c->vc_origin - sisusb->scrbuf);
983 sisusb_copy_memory(sisusb,
984 (char *)c->vc_origin,
985 (u32)(sisusb->vrambase + originoffset),
986 c->vc_screenbuf_size, &written);
987 else if (dir == SM_UP)
988 sisusb_copy_memory(sisusb,
989 (char *)c->vc_origin + c->vc_screenbuf_size - delta,
990 (u32)sisusb->vrambase + originoffset +
991 c->vc_screenbuf_size - delta,
994 sisusb_copy_memory(sisusb,
995 (char *)c->vc_origin,
996 (u32)(sisusb->vrambase + originoffset),
999 c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
1000 c->vc_visible_origin = c->vc_origin;
1002 sisusbcon_set_start_address(sisusb, c);
1004 c->vc_pos = c->vc_pos - oldorigin + c->vc_origin;
1006 mutex_unlock(&sisusb->lock);
1011 /* Interface routine */
1013 sisusbcon_set_origin(struct vc_data *c)
1015 struct sisusb_usb_data *sisusb;
1017 /* Returning != 0 means we were successful.
1018 * Returning 0 will vt make to use its own
1019 * screenbuffer as the origin.
1022 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1025 /* sisusb->lock is down */
1027 if (sisusb_is_inactive(c, sisusb) || sisusb->con_blanked) {
1028 mutex_unlock(&sisusb->lock);
1032 c->vc_origin = c->vc_visible_origin = sisusb->scrbuf;
1034 sisusbcon_set_start_address(sisusb, c);
1036 sisusb->con_rolled_over = 0;
1038 mutex_unlock(&sisusb->lock);
1043 /* Interface routine */
1045 sisusbcon_resize(struct vc_data *c, unsigned int newcols, unsigned int newrows)
1047 struct sisusb_usb_data *sisusb;
1050 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1053 fh = sisusb->current_font_height;
1055 mutex_unlock(&sisusb->lock);
1057 /* We are quite unflexible as regards resizing. The vt code
1058 * handles sizes where the line length isn't equal the pitch
1059 * quite badly. As regards the rows, our panning tricks only
1060 * work well if the number of rows equals the visible number
1064 if (newcols != 80 || c->vc_scan_lines / fh != newrows)
1071 sisusbcon_do_font_op(struct sisusb_usb_data *sisusb, int set, int slot,
1072 u8 *arg, int cmapsz, int ch512, int dorecalc,
1073 struct vc_data *c, int fh, int uplock)
1075 int font_select = 0x00, i, err = 0;
1079 /* sisusb->lock is down */
1082 * The default font is kept in slot 0.
1083 * A user font is loaded in slot 2 (256 ch)
1087 if ((slot != 0 && slot != 2) || !fh) {
1089 mutex_unlock(&sisusb->lock);
1094 sisusb->font_slot = slot;
1096 /* Default font is always 256 */
1100 offset = 4 * cmapsz;
1102 font_select = (slot == 0) ? 0x00 : (ch512 ? 0x0e : 0x0a);
1104 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x01); /* Reset */
1105 err |= sisusb_setidxreg(sisusb, SISSR, 0x02, 0x04); /* Write to plane 2 */
1106 err |= sisusb_setidxreg(sisusb, SISSR, 0x04, 0x07); /* Memory mode a0-bf */
1107 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x03); /* Reset */
1112 err |= sisusb_setidxreg(sisusb, SISGR, 0x04, 0x03); /* Select plane read 2 */
1113 err |= sisusb_setidxreg(sisusb, SISGR, 0x05, 0x00); /* Disable odd/even */
1114 err |= sisusb_setidxreg(sisusb, SISGR, 0x06, 0x00); /* Address range a0-bf */
1121 for (i = 0; i < cmapsz; i++) {
1122 err |= sisusb_writeb(sisusb,
1123 sisusb->vrambase + offset + i,
1129 for (i = 0; i < cmapsz; i++) {
1130 err |= sisusb_readb(sisusb,
1131 sisusb->vrambase + offset + i,
1138 * In 512-character mode, the character map is not contiguous if
1139 * we want to remain EGA compatible -- which we do
1144 for (i = 0; i < cmapsz; i++) {
1145 err |= sisusb_writeb(sisusb,
1146 sisusb->vrambase + offset +
1153 for (i = 0; i < cmapsz; i++) {
1154 err |= sisusb_readb(sisusb,
1155 sisusb->vrambase + offset +
1167 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x01); /* Reset */
1168 err |= sisusb_setidxreg(sisusb, SISSR, 0x02, 0x03); /* Write to planes 0+1 */
1169 err |= sisusb_setidxreg(sisusb, SISSR, 0x04, 0x03); /* Memory mode a0-bf */
1171 sisusb_setidxreg(sisusb, SISSR, 0x03, font_select);
1172 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x03); /* Reset end */
1177 err |= sisusb_setidxreg(sisusb, SISGR, 0x04, 0x00); /* Select plane read 0 */
1178 err |= sisusb_setidxreg(sisusb, SISGR, 0x05, 0x10); /* Enable odd/even */
1179 err |= sisusb_setidxreg(sisusb, SISGR, 0x06, 0x06); /* Address range b8-bf */
1184 if ((set) && (ch512 != sisusb->current_font_512)) {
1186 /* Font is shared among all our consoles.
1187 * And so is the hi_font_mask.
1189 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1190 struct vc_data *c = vc_cons[i].d;
1191 if (c && c->vc_sw == &sisusb_con)
1192 c->vc_hi_font_mask = ch512 ? 0x0800 : 0;
1195 sisusb->current_font_512 = ch512;
1197 /* color plane enable register:
1198 256-char: enable intensity bit
1199 512-char: disable intensity bit */
1200 sisusb_getreg(sisusb, SISINPSTAT, &dummy);
1201 sisusb_setreg(sisusb, SISAR, 0x12);
1202 sisusb_setreg(sisusb, SISAR, ch512 ? 0x07 : 0x0f);
1204 sisusb_getreg(sisusb, SISINPSTAT, &dummy);
1205 sisusb_setreg(sisusb, SISAR, 0x20);
1206 sisusb_getreg(sisusb, SISINPSTAT, &dummy);
1212 * Adjust the screen to fit a font of a certain height
1215 unsigned char ovr, vde, fsr;
1216 int rows = 0, maxscan = 0;
1220 /* Number of video rows */
1221 rows = c->vc_scan_lines / fh;
1222 /* Scan lines to actually display-1 */
1223 maxscan = rows * fh - 1;
1225 /*printk(KERN_DEBUG "sisusb recalc rows %d maxscan %d fh %d sl %d\n",
1226 rows, maxscan, fh, c->vc_scan_lines);*/
1228 sisusb_getidxreg(sisusb, SISCR, 0x07, &ovr);
1229 vde = maxscan & 0xff;
1230 ovr = (ovr & 0xbd) |
1231 ((maxscan & 0x100) >> 7) |
1232 ((maxscan & 0x200) >> 3);
1233 sisusb_setidxreg(sisusb, SISCR, 0x07, ovr);
1234 sisusb_setidxreg(sisusb, SISCR, 0x12, vde);
1238 sisusb_getidxreg(sisusb, SISCR, 0x09, &fsr);
1239 fsr = (fsr & 0xe0) | (fh - 1);
1240 sisusb_setidxreg(sisusb, SISCR, 0x09, fsr);
1241 sisusb->current_font_height = fh;
1243 sisusb->sisusb_cursor_size_from = -1;
1244 sisusb->sisusb_cursor_size_to = -1;
1249 mutex_unlock(&sisusb->lock);
1251 if (dorecalc && c) {
1252 int i, rows = c->vc_scan_lines / fh;
1254 /* Now adjust our consoles' size */
1256 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1257 struct vc_data *vc = vc_cons[i].d;
1259 if (vc && vc->vc_sw == &sisusb_con) {
1260 if (CON_IS_VISIBLE(vc)) {
1261 vc->vc_sw->con_cursor(vc, CM_DRAW);
1263 vc->vc_font.height = fh;
1264 vc_resize(vc, 0, rows);
1273 mutex_unlock(&sisusb->lock);
1278 /* Interface routine */
1280 sisusbcon_font_set(struct vc_data *c, struct console_font *font,
1283 struct sisusb_usb_data *sisusb;
1284 unsigned charcount = font->charcount;
1286 if (font->width != 8 || (charcount != 256 && charcount != 512))
1289 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1292 /* sisusb->lock is down */
1294 /* Save the user-provided font into a buffer. This
1295 * is used for restoring text mode after quitting
1296 * from X and for the con_getfont routine.
1298 if (sisusb->font_backup) {
1299 if (sisusb->font_backup_size < charcount) {
1300 vfree(sisusb->font_backup);
1301 sisusb->font_backup = NULL;
1305 if (!sisusb->font_backup)
1306 sisusb->font_backup = vmalloc(charcount * 32);
1308 if (sisusb->font_backup) {
1309 memcpy(sisusb->font_backup, font->data, charcount * 32);
1310 sisusb->font_backup_size = charcount;
1311 sisusb->font_backup_height = font->height;
1312 sisusb->font_backup_512 = (charcount == 512) ? 1 : 0;
1315 /* do_font_op ups sisusb->lock */
1317 return sisusbcon_do_font_op(sisusb, 1, 2, font->data,
1318 8192, (charcount == 512),
1319 (!(flags & KD_FONT_FLAG_DONT_RECALC)) ? 1 : 0,
1320 c, font->height, 1);
1323 /* Interface routine */
1325 sisusbcon_font_get(struct vc_data *c, struct console_font *font)
1327 struct sisusb_usb_data *sisusb;
1329 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1332 /* sisusb->lock is down */
1335 font->height = c->vc_font.height;
1336 font->charcount = 256;
1339 mutex_unlock(&sisusb->lock);
1343 if (!sisusb->font_backup) {
1344 mutex_unlock(&sisusb->lock);
1348 /* Copy 256 chars only, like vgacon */
1349 memcpy(font->data, sisusb->font_backup, 256 * 32);
1351 mutex_unlock(&sisusb->lock);
1357 * The console `switch' structure for the sisusb console
1360 static const struct consw sisusb_con = {
1361 .owner = THIS_MODULE,
1362 .con_startup = sisusbcon_startup,
1363 .con_init = sisusbcon_init,
1364 .con_deinit = sisusbcon_deinit,
1365 .con_clear = sisusbcon_clear,
1366 .con_putc = sisusbcon_putc,
1367 .con_putcs = sisusbcon_putcs,
1368 .con_cursor = sisusbcon_cursor,
1369 .con_scroll = sisusbcon_scroll,
1370 .con_bmove = sisusbcon_bmove,
1371 .con_switch = sisusbcon_switch,
1372 .con_blank = sisusbcon_blank,
1373 .con_font_set = sisusbcon_font_set,
1374 .con_font_get = sisusbcon_font_get,
1375 .con_set_palette = sisusbcon_set_palette,
1376 .con_scrolldelta = sisusbcon_scrolldelta,
1377 .con_build_attr = sisusbcon_build_attr,
1378 .con_invert_region = sisusbcon_invert_region,
1379 .con_set_origin = sisusbcon_set_origin,
1380 .con_save_screen = sisusbcon_save_screen,
1381 .con_resize = sisusbcon_resize,
1384 /* Our very own dummy console driver */
1386 static const char *sisusbdummycon_startup(void)
1388 return "SISUSBVGADUMMY";
1391 static void sisusbdummycon_init(struct vc_data *vc, int init)
1393 vc->vc_can_do_color = 1;
1398 vc_resize(vc, 80, 25);
1401 static int sisusbdummycon_dummy(void)
1406 #define SISUSBCONDUMMY (void *)sisusbdummycon_dummy
1408 static const struct consw sisusb_dummy_con = {
1409 .owner = THIS_MODULE,
1410 .con_startup = sisusbdummycon_startup,
1411 .con_init = sisusbdummycon_init,
1412 .con_deinit = SISUSBCONDUMMY,
1413 .con_clear = SISUSBCONDUMMY,
1414 .con_putc = SISUSBCONDUMMY,
1415 .con_putcs = SISUSBCONDUMMY,
1416 .con_cursor = SISUSBCONDUMMY,
1417 .con_scroll = SISUSBCONDUMMY,
1418 .con_bmove = SISUSBCONDUMMY,
1419 .con_switch = SISUSBCONDUMMY,
1420 .con_blank = SISUSBCONDUMMY,
1421 .con_font_set = SISUSBCONDUMMY,
1422 .con_font_get = SISUSBCONDUMMY,
1423 .con_font_default = SISUSBCONDUMMY,
1424 .con_font_copy = SISUSBCONDUMMY,
1425 .con_set_palette = SISUSBCONDUMMY,
1426 .con_scrolldelta = SISUSBCONDUMMY,
1430 sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last)
1434 mutex_lock(&sisusb->lock);
1436 /* Erm.. that should not happen */
1437 if (sisusb->haveconsole || !sisusb->SiS_Pr) {
1438 mutex_unlock(&sisusb->lock);
1442 sisusb->con_first = first;
1443 sisusb->con_last = last;
1446 first > MAX_NR_CONSOLES ||
1447 last > MAX_NR_CONSOLES) {
1448 mutex_unlock(&sisusb->lock);
1452 /* If gfxcore not initialized or no consoles given, quit graciously */
1453 if (!sisusb->gfxinit || first < 1 || last < 1) {
1454 mutex_unlock(&sisusb->lock);
1458 sisusb->sisusb_cursor_loc = -1;
1459 sisusb->sisusb_cursor_size_from = -1;
1460 sisusb->sisusb_cursor_size_to = -1;
1462 /* Set up text mode (and upload default font) */
1463 if (sisusb_reset_text_mode(sisusb, 1)) {
1464 mutex_unlock(&sisusb->lock);
1465 dev_err(&sisusb->sisusb_dev->dev, "Failed to set up text mode\n");
1469 /* Initialize some gfx registers */
1470 sisusb_initialize(sisusb);
1472 for (i = first - 1; i <= last - 1; i++) {
1473 /* Save sisusb for our interface routines */
1474 mysisusbs[i] = sisusb;
1477 /* Initial console setup */
1478 sisusb->sisusb_num_columns = 80;
1480 /* Use a 32K buffer (matches b8000-bffff area) */
1481 sisusb->scrbuf_size = 32 * 1024;
1483 /* Allocate screen buffer */
1484 if (!(sisusb->scrbuf = (unsigned long)vmalloc(sisusb->scrbuf_size))) {
1485 mutex_unlock(&sisusb->lock);
1486 dev_err(&sisusb->sisusb_dev->dev, "Failed to allocate screen buffer\n");
1490 mutex_unlock(&sisusb->lock);
1492 /* Now grab the desired console(s) */
1493 ret = take_over_console(&sisusb_con, first - 1, last - 1, 0);
1496 sisusb->haveconsole = 1;
1498 for (i = first - 1; i <= last - 1; i++)
1499 mysisusbs[i] = NULL;
1506 sisusb_console_exit(struct sisusb_usb_data *sisusb)
1510 /* This is called if the device is disconnected
1511 * and while disconnect and lock semaphores
1512 * are up. This should be save because we
1513 * can't lose our sisusb any other way but by
1514 * disconnection (and hence, the disconnect
1515 * sema is for protecting all other access
1516 * functions from disconnection, not the
1520 /* Now what do we do in case of disconnection:
1521 * One alternative would be to simply call
1522 * give_up_console(). Nah, not a good idea.
1523 * give_up_console() is obviously buggy as it
1524 * only discards the consw pointer from the
1525 * driver_map, but doesn't adapt vc->vc_sw
1526 * of the affected consoles. Hence, the next
1527 * call to any of the console functions will
1528 * eventually take a trip to oops county.
1529 * Also, give_up_console for some reason
1530 * doesn't decrement our module refcount.
1531 * Instead, we switch our consoles to a private
1532 * dummy console. This, of course, keeps our
1533 * refcount up as well, but it works perfectly.
1536 if (sisusb->haveconsole) {
1537 for (i = 0; i < MAX_NR_CONSOLES; i++)
1538 if (sisusb->havethisconsole[i])
1539 take_over_console(&sisusb_dummy_con, i, i, 0);
1540 /* At this point, con_deinit for all our
1541 * consoles is executed by take_over_console().
1543 sisusb->haveconsole = 0;
1546 vfree((void *)sisusb->scrbuf);
1549 vfree(sisusb->font_backup);
1550 sisusb->font_backup = NULL;
1553 void __init sisusb_init_concode(void)
1557 for (i = 0; i < MAX_NR_CONSOLES; i++)
1558 mysisusbs[i] = NULL;
1561 #endif /* INCL_CON */