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/tty.h>
56 #include <linux/console.h>
57 #include <linux/string.h>
59 #include <linux/init.h>
60 #include <linux/slab.h>
61 #include <linux/vt_kern.h>
62 #include <linux/selection.h>
63 #include <linux/spinlock.h>
64 #include <linux/kref.h>
65 #include <linux/ioport.h>
66 #include <linux/interrupt.h>
67 #include <linux/vmalloc.h>
70 #include "sisusb_init.h"
72 #ifdef INCL_SISUSB_CON
74 #define sisusbcon_writew(val, addr) (*(addr) = (val))
75 #define sisusbcon_readw(addr) (*(addr))
76 #define sisusbcon_memmovew(d, s, c) memmove(d, s, c)
77 #define sisusbcon_memcpyw(d, s, c) memcpy(d, s, c)
79 /* vc_data -> sisusb conversion table */
80 static struct sisusb_usb_data *mysisusbs[MAX_NR_CONSOLES];
82 /* Forward declaration */
83 static const struct consw sisusb_con;
86 sisusbcon_memsetw(u16 *s, u16 c, unsigned int count)
90 sisusbcon_writew(c, s++);
94 sisusb_initialize(struct sisusb_usb_data *sisusb)
96 /* Reset cursor and start address */
97 if (sisusb_setidxreg(sisusb, SISCR, 0x0c, 0x00))
99 if (sisusb_setidxreg(sisusb, SISCR, 0x0d, 0x00))
101 if (sisusb_setidxreg(sisusb, SISCR, 0x0e, 0x00))
103 sisusb_setidxreg(sisusb, SISCR, 0x0f, 0x00);
107 sisusbcon_set_start_address(struct sisusb_usb_data *sisusb, struct vc_data *c)
109 sisusb->cur_start_addr = (c->vc_visible_origin - sisusb->scrbuf) / 2;
111 sisusb_setidxreg(sisusb, SISCR, 0x0c, (sisusb->cur_start_addr >> 8));
112 sisusb_setidxreg(sisusb, SISCR, 0x0d, (sisusb->cur_start_addr & 0xff));
116 sisusb_set_cursor(struct sisusb_usb_data *sisusb, unsigned int location)
118 if (sisusb->sisusb_cursor_loc == location)
121 sisusb->sisusb_cursor_loc = location;
123 /* Hardware bug: Text cursor appears twice or not at all
124 * at some positions. Work around it with the cursor skew
128 if ((location & 0x0007) == 0x0007) {
129 sisusb->bad_cursor_pos = 1;
131 if (sisusb_setidxregandor(sisusb, SISCR, 0x0b, 0x1f, 0x20))
133 } else if (sisusb->bad_cursor_pos) {
134 if (sisusb_setidxregand(sisusb, SISCR, 0x0b, 0x1f))
136 sisusb->bad_cursor_pos = 0;
139 if (sisusb_setidxreg(sisusb, SISCR, 0x0e, (location >> 8)))
141 sisusb_setidxreg(sisusb, SISCR, 0x0f, (location & 0xff));
144 static inline struct sisusb_usb_data *
145 sisusb_get_sisusb(unsigned short console)
147 return mysisusbs[console];
151 sisusb_sisusb_valid(struct sisusb_usb_data *sisusb)
153 if (!sisusb->present || !sisusb->ready || !sisusb->sisusb_dev)
159 static struct sisusb_usb_data *
160 sisusb_get_sisusb_lock_and_check(unsigned short console)
162 struct sisusb_usb_data *sisusb;
164 /* We can't handle console calls in non-schedulable
165 * context due to our locks and the USB transport.
166 * So we simply ignore them. This should only affect
167 * some calls to printk.
172 if (!(sisusb = sisusb_get_sisusb(console)))
175 mutex_lock(&sisusb->lock);
177 if (!sisusb_sisusb_valid(sisusb) ||
178 !sisusb->havethisconsole[console]) {
179 mutex_unlock(&sisusb->lock);
187 sisusb_is_inactive(struct vc_data *c, struct sisusb_usb_data *sisusb)
189 if (sisusb->is_gfx ||
190 sisusb->textmodedestroyed ||
191 c->vc_mode != KD_TEXT)
197 /* con_startup console interface routine */
199 sisusbcon_startup(void)
204 /* con_init console interface routine */
206 sisusbcon_init(struct vc_data *c, int init)
208 struct sisusb_usb_data *sisusb;
211 /* This is called by take_over_console(),
212 * ie by us/under our control. It is
213 * only called after text mode and fonts
214 * are set up/restored.
217 if (!(sisusb = sisusb_get_sisusb(c->vc_num)))
220 mutex_lock(&sisusb->lock);
222 if (!sisusb_sisusb_valid(sisusb)) {
223 mutex_unlock(&sisusb->lock);
227 c->vc_can_do_color = 1;
229 c->vc_complement_mask = 0x7700;
231 c->vc_hi_font_mask = sisusb->current_font_512 ? 0x0800 : 0;
233 sisusb->haveconsole = 1;
235 sisusb->havethisconsole[c->vc_num] = 1;
237 /* We only support 640x400 */
238 c->vc_scan_lines = 400;
240 c->vc_font.height = sisusb->current_font_height;
242 /* We only support width = 8 */
244 rows = c->vc_scan_lines / c->vc_font.height;
246 /* Increment usage count for our sisusb.
247 * Doing so saves us from upping/downing
248 * the disconnect semaphore; we can't
249 * lose our sisusb until this is undone
250 * in con_deinit. For all other console
251 * interface functions, it suffices to
252 * use sisusb->lock and do a quick check
253 * of sisusb for device disconnection.
255 kref_get(&sisusb->kref);
257 if (!*c->vc_uni_pagedir_loc)
258 con_set_default_unimap(c);
260 mutex_unlock(&sisusb->lock);
266 vc_resize(c, cols, rows);
269 /* con_deinit console interface routine */
271 sisusbcon_deinit(struct vc_data *c)
273 struct sisusb_usb_data *sisusb;
276 /* This is called by take_over_console()
277 * and others, ie not under our control.
280 if (!(sisusb = sisusb_get_sisusb(c->vc_num)))
283 mutex_lock(&sisusb->lock);
285 /* Clear ourselves in mysisusbs */
286 mysisusbs[c->vc_num] = NULL;
288 sisusb->havethisconsole[c->vc_num] = 0;
290 /* Free our font buffer if all consoles are gone */
291 if (sisusb->font_backup) {
292 for(i = 0; i < MAX_NR_CONSOLES; i++) {
293 if (sisusb->havethisconsole[c->vc_num])
296 if (i == MAX_NR_CONSOLES) {
297 vfree(sisusb->font_backup);
298 sisusb->font_backup = NULL;
302 mutex_unlock(&sisusb->lock);
304 /* decrement the usage count on our sisusb */
305 kref_put(&sisusb->kref, sisusb_delete);
308 /* interface routine */
310 sisusbcon_build_attr(struct vc_data *c, u8 color, u8 intensity,
311 u8 blink, u8 underline, u8 reverse, u8 unused)
316 attr = (attr & 0xf0) | c->vc_ulcolor;
317 else if (intensity == 0)
318 attr = (attr & 0xf0) | c->vc_halfcolor;
321 attr = ((attr) & 0x88) |
323 ((attr) << 4)) & 0x77);
334 /* Interface routine */
336 sisusbcon_invert_region(struct vc_data *vc, u16 *p, int count)
338 /* Invert a region. This is called with a pointer
339 * to the console's internal screen buffer. So we
340 * simply do the inversion there and rely on
341 * a call to putc(s) to update the real screen.
345 u16 a = sisusbcon_readw(p);
348 (((a) & 0x7000) >> 4) |
349 (((a) & 0x0700) << 4);
351 sisusbcon_writew(a, p++);
355 #define SISUSB_VADDR(x,y) \
356 ((u16 *)c->vc_origin + \
357 (y) * sisusb->sisusb_num_columns + \
360 #define SISUSB_HADDR(x,y) \
361 ((u16 *)(sisusb->vrambase + (c->vc_origin - sisusb->scrbuf)) + \
362 (y) * sisusb->sisusb_num_columns + \
365 /* Interface routine */
367 sisusbcon_putc(struct vc_data *c, int ch, int y, int x)
369 struct sisusb_usb_data *sisusb;
372 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
375 /* sisusb->lock is down */
377 /* Don't need to put the character into buffer ourselves,
378 * because the vt does this BEFORE calling us.
381 sisusbcon_writew(ch, SISUSB_VADDR(x, y));
384 if (sisusb_is_inactive(c, sisusb)) {
385 mutex_unlock(&sisusb->lock);
390 sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(x, y),
391 (long)SISUSB_HADDR(x, y), 2, &written);
393 mutex_unlock(&sisusb->lock);
396 /* Interface routine */
398 sisusbcon_putcs(struct vc_data *c, const unsigned short *s,
399 int count, int y, int x)
401 struct sisusb_usb_data *sisusb;
406 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
409 /* sisusb->lock is down */
411 /* Need to put the characters into the buffer ourselves,
412 * because the vt does this AFTER calling us.
415 dest = SISUSB_VADDR(x, y);
417 for (i = count; i > 0; i--)
418 sisusbcon_writew(sisusbcon_readw(s++), dest++);
420 if (sisusb_is_inactive(c, sisusb)) {
421 mutex_unlock(&sisusb->lock);
425 sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(x, y),
426 (long)SISUSB_HADDR(x, y), count * 2, &written);
428 mutex_unlock(&sisusb->lock);
431 /* Interface routine */
433 sisusbcon_clear(struct vc_data *c, int y, int x, int height, int width)
435 struct sisusb_usb_data *sisusb;
436 u16 eattr = c->vc_video_erase_char;
441 if (width <= 0 || height <= 0)
444 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
447 /* sisusb->lock is down */
449 /* Need to clear buffer ourselves, because the vt does
450 * this AFTER calling us.
453 dest = SISUSB_VADDR(x, y);
455 cols = sisusb->sisusb_num_columns;
460 if (x == 0 && width >= c->vc_cols) {
462 sisusbcon_memsetw(dest, eattr, height * cols * 2);
466 for (i = height; i > 0; i--, dest += cols)
467 sisusbcon_memsetw(dest, eattr, width * 2);
471 if (sisusb_is_inactive(c, sisusb)) {
472 mutex_unlock(&sisusb->lock);
476 length = ((height * cols) - x - (cols - width - x)) * 2;
479 sisusb_copy_memory(sisusb, (unsigned char *)SISUSB_VADDR(x, y),
480 (long)SISUSB_HADDR(x, y), length, &written);
482 mutex_unlock(&sisusb->lock);
485 /* Interface routine */
487 sisusbcon_bmove(struct vc_data *c, int sy, int sx,
488 int dy, int dx, int height, int width)
490 struct sisusb_usb_data *sisusb;
498 if (width <= 0 || height <= 0)
501 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
504 /* sisusb->lock is down */
506 cols = sisusb->sisusb_num_columns;
508 /* Don't need to move data outselves, because
509 * vt does this BEFORE calling us.
510 * This is only used by vt's insert/deletechar.
513 if (sx == 0 && dx == 0 && width >= c->vc_cols && width <= cols) {
515 sisusbcon_memmovew(SISUSB_VADDR(0, dy), SISUSB_VADDR(0, sy),
518 } else if (dy < sy || (dy == sy && dx < sx)) {
520 src = SISUSB_VADDR(sx, sy);
521 dest = SISUSB_VADDR(dx, dy);
523 for (i = height; i > 0; i--) {
524 sisusbcon_memmovew(dest, src, width * 2);
531 src = SISUSB_VADDR(sx, sy + height - 1);
532 dest = SISUSB_VADDR(dx, dy + height - 1);
534 for (i = height; i > 0; i--) {
535 sisusbcon_memmovew(dest, src, width * 2);
543 if (sisusb_is_inactive(c, sisusb)) {
544 mutex_unlock(&sisusb->lock);
548 length = ((height * cols) - dx - (cols - width - dx)) * 2;
551 sisusb_copy_memory(sisusb, (unsigned char *)SISUSB_VADDR(dx, dy),
552 (long)SISUSB_HADDR(dx, dy), length, &written);
554 mutex_unlock(&sisusb->lock);
557 /* interface routine */
559 sisusbcon_switch(struct vc_data *c)
561 struct sisusb_usb_data *sisusb;
565 /* Returnvalue 0 means we have fully restored screen,
566 * and vt doesn't need to call do_update_region().
567 * Returnvalue != 0 naturally means the opposite.
570 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
573 /* sisusb->lock is down */
575 /* Don't write to screen if in gfx mode */
576 if (sisusb_is_inactive(c, sisusb)) {
577 mutex_unlock(&sisusb->lock);
581 /* That really should not happen. It would mean we are
582 * being called while the vc is using its private buffer
585 if (c->vc_origin == (unsigned long)c->vc_screenbuf) {
586 mutex_unlock(&sisusb->lock);
587 printk(KERN_DEBUG "sisusb: ASSERT ORIGIN != SCREENBUF!\n");
591 /* Check that we don't copy too much */
592 length = min((int)c->vc_screenbuf_size,
593 (int)(sisusb->scrbuf + sisusb->scrbuf_size - c->vc_origin));
595 /* Restore the screen contents */
596 sisusbcon_memcpyw((u16 *)c->vc_origin, (u16 *)c->vc_screenbuf,
599 sisusb_copy_memory(sisusb, (unsigned char *)c->vc_origin,
600 (long)SISUSB_HADDR(0, 0),
603 mutex_unlock(&sisusb->lock);
608 /* interface routine */
610 sisusbcon_save_screen(struct vc_data *c)
612 struct sisusb_usb_data *sisusb;
615 /* Save the current screen contents to vc's private
619 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
622 /* sisusb->lock is down */
624 if (sisusb_is_inactive(c, sisusb)) {
625 mutex_unlock(&sisusb->lock);
629 /* Check that we don't copy too much */
630 length = min((int)c->vc_screenbuf_size,
631 (int)(sisusb->scrbuf + sisusb->scrbuf_size - c->vc_origin));
633 /* Save the screen contents to vc's private buffer */
634 sisusbcon_memcpyw((u16 *)c->vc_screenbuf, (u16 *)c->vc_origin,
637 mutex_unlock(&sisusb->lock);
640 /* interface routine */
642 sisusbcon_set_palette(struct vc_data *c, unsigned char *table)
644 struct sisusb_usb_data *sisusb;
647 /* Return value not used by vt */
649 if (!CON_IS_VISIBLE(c))
652 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
655 /* sisusb->lock is down */
657 if (sisusb_is_inactive(c, sisusb)) {
658 mutex_unlock(&sisusb->lock);
662 for (i = j = 0; i < 16; i++) {
663 if (sisusb_setreg(sisusb, SISCOLIDX, table[i]))
665 if (sisusb_setreg(sisusb, SISCOLDATA, c->vc_palette[j++] >> 2))
667 if (sisusb_setreg(sisusb, SISCOLDATA, c->vc_palette[j++] >> 2))
669 if (sisusb_setreg(sisusb, SISCOLDATA, c->vc_palette[j++] >> 2))
673 mutex_unlock(&sisusb->lock);
678 /* interface routine */
680 sisusbcon_blank(struct vc_data *c, int blank, int mode_switch)
682 struct sisusb_usb_data *sisusb;
683 u8 sr1, cr17, pmreg, cr63;
687 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
690 /* sisusb->lock is down */
693 sisusb->is_gfx = blank ? 1 : 0;
695 if (sisusb_is_inactive(c, sisusb)) {
696 mutex_unlock(&sisusb->lock);
702 case 1: /* Normal blanking: Clear screen */
704 sisusbcon_memsetw((u16 *)c->vc_origin,
705 c->vc_video_erase_char,
706 c->vc_screenbuf_size);
707 sisusb_copy_memory(sisusb,
708 (unsigned char *)c->vc_origin,
709 (u32)(sisusb->vrambase +
710 (c->vc_origin - sisusb->scrbuf)),
711 c->vc_screenbuf_size, &written);
712 sisusb->con_blanked = 1;
716 default: /* VESA blanking */
718 case 0: /* Unblank */
724 sisusb->con_blanked = 0;
726 case VESA_VSYNC_SUSPEND + 1:
732 case VESA_HSYNC_SUSPEND + 1:
738 case VESA_POWERDOWN + 1:
745 mutex_unlock(&sisusb->lock);
749 sisusb_setidxregandor(sisusb, SISSR, 0x01, ~0x20, sr1);
750 sisusb_setidxregandor(sisusb, SISCR, 0x17, 0x7f, cr17);
751 sisusb_setidxregandor(sisusb, SISSR, 0x1f, 0x3f, pmreg);
752 sisusb_setidxregandor(sisusb, SISCR, 0x63, 0xbf, cr63);
756 mutex_unlock(&sisusb->lock);
761 /* interface routine */
763 sisusbcon_scrolldelta(struct vc_data *c, int lines)
765 struct sisusb_usb_data *sisusb;
766 int margin = c->vc_size_row * 4;
769 /* The return value does not seem to be used */
771 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
774 /* sisusb->lock is down */
776 if (sisusb_is_inactive(c, sisusb)) {
777 mutex_unlock(&sisusb->lock);
781 if (!lines) /* Turn scrollback off */
782 c->vc_visible_origin = c->vc_origin;
785 if (sisusb->con_rolled_over >
786 (c->vc_scr_end - sisusb->scrbuf) + margin) {
788 ul = c->vc_scr_end - sisusb->scrbuf;
789 we = sisusb->con_rolled_over + c->vc_size_row;
794 we = sisusb->scrbuf_size;
798 p = (c->vc_visible_origin - sisusb->scrbuf - ul + we) % we +
799 lines * c->vc_size_row;
801 st = (c->vc_origin - sisusb->scrbuf - ul + we) % we;
812 c->vc_visible_origin = sisusb->scrbuf + (p + ul) % we;
815 sisusbcon_set_start_address(sisusb, c);
817 mutex_unlock(&sisusb->lock);
822 /* Interface routine */
824 sisusbcon_cursor(struct vc_data *c, int mode)
826 struct sisusb_usb_data *sisusb;
827 int from, to, baseline;
829 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
832 /* sisusb->lock is down */
834 if (sisusb_is_inactive(c, sisusb)) {
835 mutex_unlock(&sisusb->lock);
839 if (c->vc_origin != c->vc_visible_origin) {
840 c->vc_visible_origin = c->vc_origin;
841 sisusbcon_set_start_address(sisusb, c);
844 if (mode == CM_ERASE) {
845 sisusb_setidxregor(sisusb, SISCR, 0x0a, 0x20);
846 sisusb->sisusb_cursor_size_to = -1;
847 mutex_unlock(&sisusb->lock);
851 sisusb_set_cursor(sisusb, (c->vc_pos - sisusb->scrbuf) / 2);
853 baseline = c->vc_font.height - (c->vc_font.height < 10 ? 1 : 2);
855 switch (c->vc_cursor_type & 0x0f) {
856 case CUR_BLOCK: from = 1;
857 to = c->vc_font.height;
859 case CUR_TWO_THIRDS: from = c->vc_font.height / 3;
862 case CUR_LOWER_HALF: from = c->vc_font.height / 2;
865 case CUR_LOWER_THIRD: from = (c->vc_font.height * 2) / 3;
868 case CUR_NONE: from = 31;
872 case CUR_UNDERLINE: from = baseline - 1;
877 if (sisusb->sisusb_cursor_size_from != from ||
878 sisusb->sisusb_cursor_size_to != to) {
880 sisusb_setidxreg(sisusb, SISCR, 0x0a, from);
881 sisusb_setidxregandor(sisusb, SISCR, 0x0b, 0xe0, to);
883 sisusb->sisusb_cursor_size_from = from;
884 sisusb->sisusb_cursor_size_to = to;
887 mutex_unlock(&sisusb->lock);
891 sisusbcon_scroll_area(struct vc_data *c, struct sisusb_usb_data *sisusb,
892 int t, int b, int dir, int lines)
894 int cols = sisusb->sisusb_num_columns;
895 int length = ((b - t) * cols) * 2;
896 u16 eattr = c->vc_video_erase_char;
899 /* sisusb->lock is down */
901 /* Scroll an area which does not match the
902 * visible screen's dimensions. This needs
903 * to be done separately, as it does not
904 * use hardware panning.
910 sisusbcon_memmovew(SISUSB_VADDR(0, t),
911 SISUSB_VADDR(0, t + lines),
912 (b - t - lines) * cols * 2);
913 sisusbcon_memsetw(SISUSB_VADDR(0, b - lines), eattr,
918 sisusbcon_memmovew(SISUSB_VADDR(0, t + lines),
920 (b - t - lines) * cols * 2);
921 sisusbcon_memsetw(SISUSB_VADDR(0, t), eattr,
926 sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(0, t),
927 (long)SISUSB_HADDR(0, t), length, &written);
929 mutex_unlock(&sisusb->lock);
934 /* Interface routine */
936 sisusbcon_scroll(struct vc_data *c, int t, int b, int dir, int lines)
938 struct sisusb_usb_data *sisusb;
939 u16 eattr = c->vc_video_erase_char;
942 unsigned long oldorigin;
943 unsigned int delta = lines * c->vc_size_row;
946 /* Returning != 0 means we have done the scrolling successfully.
947 * Returning 0 makes vt do the scrolling on its own.
948 * Note that con_scroll is only called if the console is
949 * visible. In that case, the origin should be our buffer,
950 * not the vt's private one.
956 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
959 /* sisusb->lock is down */
961 if (sisusb_is_inactive(c, sisusb)) {
962 mutex_unlock(&sisusb->lock);
967 if (t || b != c->vc_rows)
968 return sisusbcon_scroll_area(c, sisusb, t, b, dir, lines);
970 if (c->vc_origin != c->vc_visible_origin) {
971 c->vc_visible_origin = c->vc_origin;
972 sisusbcon_set_start_address(sisusb, c);
975 /* limit amount to maximum realistic size */
976 if (lines > c->vc_rows)
979 oldorigin = c->vc_origin;
985 if (c->vc_scr_end + delta >=
986 sisusb->scrbuf + sisusb->scrbuf_size) {
987 sisusbcon_memcpyw((u16 *)sisusb->scrbuf,
988 (u16 *)(oldorigin + delta),
989 c->vc_screenbuf_size - delta);
990 c->vc_origin = sisusb->scrbuf;
991 sisusb->con_rolled_over = oldorigin - sisusb->scrbuf;
994 c->vc_origin += delta;
997 (u16 *)(c->vc_origin + c->vc_screenbuf_size - delta),
1004 if (oldorigin - delta < sisusb->scrbuf) {
1005 sisusbcon_memmovew((u16 *)(sisusb->scrbuf +
1006 sisusb->scrbuf_size -
1007 c->vc_screenbuf_size +
1010 c->vc_screenbuf_size - delta);
1011 c->vc_origin = sisusb->scrbuf +
1012 sisusb->scrbuf_size -
1013 c->vc_screenbuf_size;
1014 sisusb->con_rolled_over = 0;
1017 c->vc_origin -= delta;
1019 c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
1021 scr_memsetw((u16 *)(c->vc_origin), eattr, delta);
1026 originoffset = (u32)(c->vc_origin - sisusb->scrbuf);
1029 sisusb_copy_memory(sisusb,
1030 (char *)c->vc_origin,
1031 (u32)(sisusb->vrambase + originoffset),
1032 c->vc_screenbuf_size, &written);
1033 else if (dir == SM_UP)
1034 sisusb_copy_memory(sisusb,
1035 (char *)c->vc_origin + c->vc_screenbuf_size - delta,
1036 (u32)sisusb->vrambase + originoffset +
1037 c->vc_screenbuf_size - delta,
1040 sisusb_copy_memory(sisusb,
1041 (char *)c->vc_origin,
1042 (u32)(sisusb->vrambase + originoffset),
1045 c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
1046 c->vc_visible_origin = c->vc_origin;
1048 sisusbcon_set_start_address(sisusb, c);
1050 c->vc_pos = c->vc_pos - oldorigin + c->vc_origin;
1052 mutex_unlock(&sisusb->lock);
1057 /* Interface routine */
1059 sisusbcon_set_origin(struct vc_data *c)
1061 struct sisusb_usb_data *sisusb;
1063 /* Returning != 0 means we were successful.
1064 * Returning 0 will vt make to use its own
1065 * screenbuffer as the origin.
1068 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1071 /* sisusb->lock is down */
1073 if (sisusb_is_inactive(c, sisusb) || sisusb->con_blanked) {
1074 mutex_unlock(&sisusb->lock);
1078 c->vc_origin = c->vc_visible_origin = sisusb->scrbuf;
1080 sisusbcon_set_start_address(sisusb, c);
1082 sisusb->con_rolled_over = 0;
1084 mutex_unlock(&sisusb->lock);
1089 /* Interface routine */
1091 sisusbcon_resize(struct vc_data *c, unsigned int newcols, unsigned int newrows)
1093 struct sisusb_usb_data *sisusb;
1096 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1099 fh = sisusb->current_font_height;
1101 mutex_unlock(&sisusb->lock);
1103 /* We are quite unflexible as regards resizing. The vt code
1104 * handles sizes where the line length isn't equal the pitch
1105 * quite badly. As regards the rows, our panning tricks only
1106 * work well if the number of rows equals the visible number
1110 if (newcols != 80 || c->vc_scan_lines / fh != newrows)
1117 sisusbcon_do_font_op(struct sisusb_usb_data *sisusb, int set, int slot,
1118 u8 *arg, int cmapsz, int ch512, int dorecalc,
1119 struct vc_data *c, int fh, int uplock)
1121 int font_select = 0x00, i, err = 0;
1125 /* sisusb->lock is down */
1128 * The default font is kept in slot 0.
1129 * A user font is loaded in slot 2 (256 ch)
1133 if ((slot != 0 && slot != 2) || !fh) {
1135 mutex_unlock(&sisusb->lock);
1140 sisusb->font_slot = slot;
1142 /* Default font is always 256 */
1146 offset = 4 * cmapsz;
1148 font_select = (slot == 0) ? 0x00 : (ch512 ? 0x0e : 0x0a);
1150 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x01); /* Reset */
1151 err |= sisusb_setidxreg(sisusb, SISSR, 0x02, 0x04); /* Write to plane 2 */
1152 err |= sisusb_setidxreg(sisusb, SISSR, 0x04, 0x07); /* Memory mode a0-bf */
1153 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x03); /* Reset */
1158 err |= sisusb_setidxreg(sisusb, SISGR, 0x04, 0x03); /* Select plane read 2 */
1159 err |= sisusb_setidxreg(sisusb, SISGR, 0x05, 0x00); /* Disable odd/even */
1160 err |= sisusb_setidxreg(sisusb, SISGR, 0x06, 0x00); /* Address range a0-bf */
1167 for (i = 0; i < cmapsz; i++) {
1168 err |= sisusb_writeb(sisusb,
1169 sisusb->vrambase + offset + i,
1175 for (i = 0; i < cmapsz; i++) {
1176 err |= sisusb_readb(sisusb,
1177 sisusb->vrambase + offset + i,
1184 * In 512-character mode, the character map is not contiguous if
1185 * we want to remain EGA compatible -- which we do
1190 for (i = 0; i < cmapsz; i++) {
1191 err |= sisusb_writeb(sisusb,
1192 sisusb->vrambase + offset +
1199 for (i = 0; i < cmapsz; i++) {
1200 err |= sisusb_readb(sisusb,
1201 sisusb->vrambase + offset +
1213 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x01); /* Reset */
1214 err |= sisusb_setidxreg(sisusb, SISSR, 0x02, 0x03); /* Write to planes 0+1 */
1215 err |= sisusb_setidxreg(sisusb, SISSR, 0x04, 0x03); /* Memory mode a0-bf */
1217 sisusb_setidxreg(sisusb, SISSR, 0x03, font_select);
1218 err |= sisusb_setidxreg(sisusb, SISSR, 0x00, 0x03); /* Reset end */
1223 err |= sisusb_setidxreg(sisusb, SISGR, 0x04, 0x00); /* Select plane read 0 */
1224 err |= sisusb_setidxreg(sisusb, SISGR, 0x05, 0x10); /* Enable odd/even */
1225 err |= sisusb_setidxreg(sisusb, SISGR, 0x06, 0x06); /* Address range b8-bf */
1230 if ((set) && (ch512 != sisusb->current_font_512)) {
1232 /* Font is shared among all our consoles.
1233 * And so is the hi_font_mask.
1235 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1236 struct vc_data *c = vc_cons[i].d;
1237 if (c && c->vc_sw == &sisusb_con)
1238 c->vc_hi_font_mask = ch512 ? 0x0800 : 0;
1241 sisusb->current_font_512 = ch512;
1243 /* color plane enable register:
1244 256-char: enable intensity bit
1245 512-char: disable intensity bit */
1246 sisusb_getreg(sisusb, SISINPSTAT, &dummy);
1247 sisusb_setreg(sisusb, SISAR, 0x12);
1248 sisusb_setreg(sisusb, SISAR, ch512 ? 0x07 : 0x0f);
1250 sisusb_getreg(sisusb, SISINPSTAT, &dummy);
1251 sisusb_setreg(sisusb, SISAR, 0x20);
1252 sisusb_getreg(sisusb, SISINPSTAT, &dummy);
1258 * Adjust the screen to fit a font of a certain height
1261 unsigned char ovr, vde, fsr;
1262 int rows = 0, maxscan = 0;
1266 /* Number of video rows */
1267 rows = c->vc_scan_lines / fh;
1268 /* Scan lines to actually display-1 */
1269 maxscan = rows * fh - 1;
1271 /*printk(KERN_DEBUG "sisusb recalc rows %d maxscan %d fh %d sl %d\n",
1272 rows, maxscan, fh, c->vc_scan_lines);*/
1274 sisusb_getidxreg(sisusb, SISCR, 0x07, &ovr);
1275 vde = maxscan & 0xff;
1276 ovr = (ovr & 0xbd) |
1277 ((maxscan & 0x100) >> 7) |
1278 ((maxscan & 0x200) >> 3);
1279 sisusb_setidxreg(sisusb, SISCR, 0x07, ovr);
1280 sisusb_setidxreg(sisusb, SISCR, 0x12, vde);
1284 sisusb_getidxreg(sisusb, SISCR, 0x09, &fsr);
1285 fsr = (fsr & 0xe0) | (fh - 1);
1286 sisusb_setidxreg(sisusb, SISCR, 0x09, fsr);
1287 sisusb->current_font_height = fh;
1289 sisusb->sisusb_cursor_size_from = -1;
1290 sisusb->sisusb_cursor_size_to = -1;
1295 mutex_unlock(&sisusb->lock);
1297 if (dorecalc && c) {
1298 int i, rows = c->vc_scan_lines / fh;
1300 /* Now adjust our consoles' size */
1302 for (i = 0; i < MAX_NR_CONSOLES; i++) {
1303 struct vc_data *vc = vc_cons[i].d;
1305 if (vc && vc->vc_sw == &sisusb_con) {
1306 if (CON_IS_VISIBLE(vc)) {
1307 vc->vc_sw->con_cursor(vc, CM_DRAW);
1309 vc->vc_font.height = fh;
1310 vc_resize(vc, 0, rows);
1319 mutex_unlock(&sisusb->lock);
1324 /* Interface routine */
1326 sisusbcon_font_set(struct vc_data *c, struct console_font *font,
1329 struct sisusb_usb_data *sisusb;
1330 unsigned charcount = font->charcount;
1332 if (font->width != 8 || (charcount != 256 && charcount != 512))
1335 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1338 /* sisusb->lock is down */
1340 /* Save the user-provided font into a buffer. This
1341 * is used for restoring text mode after quitting
1342 * from X and for the con_getfont routine.
1344 if (sisusb->font_backup) {
1345 if (sisusb->font_backup_size < charcount) {
1346 vfree(sisusb->font_backup);
1347 sisusb->font_backup = NULL;
1351 if (!sisusb->font_backup)
1352 sisusb->font_backup = vmalloc(charcount * 32);
1354 if (sisusb->font_backup) {
1355 memcpy(sisusb->font_backup, font->data, charcount * 32);
1356 sisusb->font_backup_size = charcount;
1357 sisusb->font_backup_height = font->height;
1358 sisusb->font_backup_512 = (charcount == 512) ? 1 : 0;
1361 /* do_font_op ups sisusb->lock */
1363 return sisusbcon_do_font_op(sisusb, 1, 2, font->data,
1364 8192, (charcount == 512),
1365 (!(flags & KD_FONT_FLAG_DONT_RECALC)) ? 1 : 0,
1366 c, font->height, 1);
1369 /* Interface routine */
1371 sisusbcon_font_get(struct vc_data *c, struct console_font *font)
1373 struct sisusb_usb_data *sisusb;
1375 if (!(sisusb = sisusb_get_sisusb_lock_and_check(c->vc_num)))
1378 /* sisusb->lock is down */
1381 font->height = c->vc_font.height;
1382 font->charcount = 256;
1385 mutex_unlock(&sisusb->lock);
1389 if (!sisusb->font_backup) {
1390 mutex_unlock(&sisusb->lock);
1394 /* Copy 256 chars only, like vgacon */
1395 memcpy(font->data, sisusb->font_backup, 256 * 32);
1397 mutex_unlock(&sisusb->lock);
1403 * The console `switch' structure for the sisusb console
1406 static const struct consw sisusb_con = {
1407 .owner = THIS_MODULE,
1408 .con_startup = sisusbcon_startup,
1409 .con_init = sisusbcon_init,
1410 .con_deinit = sisusbcon_deinit,
1411 .con_clear = sisusbcon_clear,
1412 .con_putc = sisusbcon_putc,
1413 .con_putcs = sisusbcon_putcs,
1414 .con_cursor = sisusbcon_cursor,
1415 .con_scroll = sisusbcon_scroll,
1416 .con_bmove = sisusbcon_bmove,
1417 .con_switch = sisusbcon_switch,
1418 .con_blank = sisusbcon_blank,
1419 .con_font_set = sisusbcon_font_set,
1420 .con_font_get = sisusbcon_font_get,
1421 .con_set_palette = sisusbcon_set_palette,
1422 .con_scrolldelta = sisusbcon_scrolldelta,
1423 .con_build_attr = sisusbcon_build_attr,
1424 .con_invert_region = sisusbcon_invert_region,
1425 .con_set_origin = sisusbcon_set_origin,
1426 .con_save_screen = sisusbcon_save_screen,
1427 .con_resize = sisusbcon_resize,
1430 /* Our very own dummy console driver */
1432 static const char *sisusbdummycon_startup(void)
1434 return "SISUSBVGADUMMY";
1437 static void sisusbdummycon_init(struct vc_data *vc, int init)
1439 vc->vc_can_do_color = 1;
1444 vc_resize(vc, 80, 25);
1447 static int sisusbdummycon_dummy(void)
1452 #define SISUSBCONDUMMY (void *)sisusbdummycon_dummy
1454 static const struct consw sisusb_dummy_con = {
1455 .owner = THIS_MODULE,
1456 .con_startup = sisusbdummycon_startup,
1457 .con_init = sisusbdummycon_init,
1458 .con_deinit = SISUSBCONDUMMY,
1459 .con_clear = SISUSBCONDUMMY,
1460 .con_putc = SISUSBCONDUMMY,
1461 .con_putcs = SISUSBCONDUMMY,
1462 .con_cursor = SISUSBCONDUMMY,
1463 .con_scroll = SISUSBCONDUMMY,
1464 .con_bmove = SISUSBCONDUMMY,
1465 .con_switch = SISUSBCONDUMMY,
1466 .con_blank = SISUSBCONDUMMY,
1467 .con_font_set = SISUSBCONDUMMY,
1468 .con_font_get = SISUSBCONDUMMY,
1469 .con_font_default = SISUSBCONDUMMY,
1470 .con_font_copy = SISUSBCONDUMMY,
1471 .con_set_palette = SISUSBCONDUMMY,
1472 .con_scrolldelta = SISUSBCONDUMMY,
1476 sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last)
1478 int i, ret, minor = sisusb->minor;
1480 mutex_lock(&sisusb->lock);
1482 /* Erm.. that should not happen */
1483 if (sisusb->haveconsole || !sisusb->SiS_Pr) {
1484 mutex_unlock(&sisusb->lock);
1488 sisusb->con_first = first;
1489 sisusb->con_last = last;
1492 first > MAX_NR_CONSOLES ||
1493 last > MAX_NR_CONSOLES) {
1494 mutex_unlock(&sisusb->lock);
1498 /* If gfxcore not initialized or no consoles given, quit graciously */
1499 if (!sisusb->gfxinit || first < 1 || last < 1) {
1500 mutex_unlock(&sisusb->lock);
1504 sisusb->sisusb_cursor_loc = -1;
1505 sisusb->sisusb_cursor_size_from = -1;
1506 sisusb->sisusb_cursor_size_to = -1;
1508 /* Set up text mode (and upload default font) */
1509 if (sisusb_reset_text_mode(sisusb, 1)) {
1510 mutex_unlock(&sisusb->lock);
1512 "sisusbvga[%d]: Failed to set up text mode\n",
1517 /* Initialize some gfx registers */
1518 sisusb_initialize(sisusb);
1520 for (i = first - 1; i <= last - 1; i++) {
1521 /* Save sisusb for our interface routines */
1522 mysisusbs[i] = sisusb;
1525 /* Initial console setup */
1526 sisusb->sisusb_num_columns = 80;
1528 /* Use a 32K buffer (matches b8000-bffff area) */
1529 sisusb->scrbuf_size = 32 * 1024;
1531 /* Allocate screen buffer */
1532 if (!(sisusb->scrbuf = (unsigned long)vmalloc(sisusb->scrbuf_size))) {
1533 mutex_unlock(&sisusb->lock);
1535 "sisusbvga[%d]: Failed to allocate screen buffer\n",
1540 mutex_unlock(&sisusb->lock);
1542 /* Now grab the desired console(s) */
1543 ret = take_over_console(&sisusb_con, first - 1, last - 1, 0);
1546 sisusb->haveconsole = 1;
1548 for (i = first - 1; i <= last - 1; i++)
1549 mysisusbs[i] = NULL;
1556 sisusb_console_exit(struct sisusb_usb_data *sisusb)
1560 /* This is called if the device is disconnected
1561 * and while disconnect and lock semaphores
1562 * are up. This should be save because we
1563 * can't lose our sisusb any other way but by
1564 * disconnection (and hence, the disconnect
1565 * sema is for protecting all other access
1566 * functions from disconnection, not the
1570 /* Now what do we do in case of disconnection:
1571 * One alternative would be to simply call
1572 * give_up_console(). Nah, not a good idea.
1573 * give_up_console() is obviously buggy as it
1574 * only discards the consw pointer from the
1575 * driver_map, but doesn't adapt vc->vc_sw
1576 * of the affected consoles. Hence, the next
1577 * call to any of the console functions will
1578 * eventually take a trip to oops county.
1579 * Also, give_up_console for some reason
1580 * doesn't decrement our module refcount.
1581 * Instead, we switch our consoles to a private
1582 * dummy console. This, of course, keeps our
1583 * refcount up as well, but it works perfectly.
1586 if (sisusb->haveconsole) {
1587 for (i = 0; i < MAX_NR_CONSOLES; i++)
1588 if (sisusb->havethisconsole[i])
1589 take_over_console(&sisusb_dummy_con, i, i, 0);
1590 /* At this point, con_deinit for all our
1591 * consoles is executed by take_over_console().
1593 sisusb->haveconsole = 0;
1596 vfree((void *)sisusb->scrbuf);
1599 vfree(sisusb->font_backup);
1600 sisusb->font_backup = NULL;
1603 void __init sisusb_init_concode(void)
1607 for (i = 0; i < MAX_NR_CONSOLES; i++)
1608 mysisusbs[i] = NULL;
1611 #endif /* INCL_CON */