sticon.c
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上传日期:2013-04-10
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- /*
- * linux/drivers/video/sti/sticon.c - console driver using HP's STI firmware
- *
- * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
- * Copyright (C) 2001 Helge Deller <deller@gmx.de>
- *
- * Based on linux/drivers/video/vgacon.c and linux/drivers/video/fbcon.c,
- * which were
- *
- * Created 28 Sep 1997 by Geert Uytterhoeven
- * Rewritten by Martin Mares <mj@ucw.cz>, July 1998
- * Copyright (C) 1991, 1992 Linus Torvalds
- * 1995 Jay Estabrook
- * Copyright (C) 1995 Geert Uytterhoeven
- * Copyright (C) 1993 Bjoern Brauel
- * Roman Hodek
- * Copyright (C) 1993 Hamish Macdonald
- * Greg Harp
- * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
- *
- * with work by William Rucklidge (wjr@cs.cornell.edu)
- * Geert Uytterhoeven
- * Jes Sorensen (jds@kom.auc.dk)
- * Martin Apel
- * with work by Guenther Kelleter
- * Martin Schaller
- * Andreas Schwab
- * Emmanuel Marty (core@ggi-project.org)
- * Jakub Jelinek (jj@ultra.linux.cz)
- * Martin Mares <mj@ucw.cz>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- *
- */
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/tty.h>
- #include <linux/console.h>
- #include <linux/console_struct.h>
- #include <linux/errno.h>
- #include <linux/vt_kern.h>
- #include <linux/kd.h>
- #include <linux/selection.h>
- #include <asm/io.h>
- #include "sticore.h"
- /* switching to graphics mode */
- #define BLANK 0
- static int vga_is_gfx;
- /* Software scrollback */
- static unsigned long softback_buf, softback_curr;
- static unsigned long softback_in;
- static unsigned long /* softback_top, */ softback_end;
- static int softback_lines;
- /* software cursor */
- static int cursor_drawn;
- #define CURSOR_DRAW_DELAY (1)
- #define DEFAULT_CURSOR_BLINK_RATE (20)
- static int vbl_cursor_cnt;
- static inline void cursor_undrawn(void)
- {
- vbl_cursor_cnt = 0;
- cursor_drawn = 0;
- }
- static const char *__init sticon_startup(void)
- {
- return "STI console";
- }
- static int sticon_set_palette(struct vc_data *c, unsigned char *table)
- {
- return -EINVAL;
- }
- static int sticon_font_op(struct vc_data *c, struct console_font_op *op)
- {
- return -ENOSYS;
- }
- static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos)
- {
- int unit = conp->vc_num;
- int redraw_cursor = 0;
- if (vga_is_gfx || console_blanked)
- return;
-
- if (vt_cons[unit]->vc_mode != KD_TEXT)
- return;
- #if 0
- if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) {
- cursor_undrawn();
- redraw_cursor = 1;
- }
- #endif
- sti_putc(default_sti, c, ypos, xpos);
- if (redraw_cursor)
- vbl_cursor_cnt = CURSOR_DRAW_DELAY;
- }
- static void sticon_putcs(struct vc_data *conp, const unsigned short *s,
- int count, int ypos, int xpos)
- {
- int unit = conp->vc_num;
- int redraw_cursor = 0;
- if (vga_is_gfx || console_blanked)
- return;
- if (vt_cons[unit]->vc_mode != KD_TEXT)
- return;
-
- #if 0
- if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) &&
- (p->cursor_x < (xpos + count))) {
- cursor_undrawn();
- redraw_cursor = 1;
- }
- #endif
- while (count--) {
- sti_putc(default_sti, scr_readw(s++), ypos, xpos++);
- }
- if (redraw_cursor)
- vbl_cursor_cnt = CURSOR_DRAW_DELAY;
- }
- static void sticon_cursor(struct vc_data *conp, int mode)
- {
- unsigned short car1;
- car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols];
- switch (mode) {
- case CM_ERASE:
- sti_putc(default_sti, car1, conp->vc_y, conp->vc_x);
- break;
- case CM_MOVE:
- case CM_DRAW:
- switch (conp->vc_cursor_type & 0x0f) {
- case CUR_UNDERLINE:
- case CUR_LOWER_THIRD:
- case CUR_LOWER_HALF:
- case CUR_TWO_THIRDS:
- case CUR_BLOCK:
- sti_putc(default_sti, (car1 & 255) + (0 << 8) + (7 << 11),
- conp->vc_y, conp->vc_x);
- break;
- }
- break;
- }
- }
- static int
- sticon_scroll(struct vc_data *conp, int t, int b, int dir, int count)
- {
- struct sti_struct *sti = default_sti;
- if (vga_is_gfx)
- return 0;
- sticon_cursor(conp, CM_ERASE);
- switch (dir) {
- case SM_UP:
- sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols);
- sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char);
- break;
- case SM_DOWN:
- sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols);
- sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char);
- break;
- }
- return 0;
- }
- static void
- sticon_bmove(struct vc_data *conp, int sy, int sx, int dy, int dx,
- int height, int width)
- {
- if (!width || !height)
- return;
- #if 0
- if (((sy <= p->cursor_y) && (p->cursor_y < sy+height) &&
- (sx <= p->cursor_x) && (p->cursor_x < sx+width)) ||
- ((dy <= p->cursor_y) && (p->cursor_y < dy+height) &&
- (dx <= p->cursor_x) && (p->cursor_x < dx+width)))
- sticon_cursor(p, CM_ERASE /*|CM_SOFTBACK*/);
- #endif
- sti_bmove(default_sti, sy, sx, dy, dx, height, width);
- }
- static void sticon_init(struct vc_data *c, int init)
- {
- struct sti_struct *sti = default_sti;
- int vc_cols, vc_rows;
- sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0);
- vc_cols = sti_onscreen_x(sti) / sti->font_width;
- vc_rows = sti_onscreen_y(sti) / sti->font_height;
- c->vc_can_do_color = 1;
-
- if (init) {
- c->vc_cols = vc_cols;
- c->vc_rows = vc_rows;
- } else {
- /* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */
- /* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */
- vc_resize_con(vc_rows, vc_cols, c->vc_num);
- }
- }
- static void sticon_deinit(struct vc_data *c)
- {
- }
- static void sticon_clear(struct vc_data *conp, int sy, int sx, int height,
- int width)
- {
- if (!height || !width)
- return;
- sti_clear(default_sti, sy, sx, height, width, conp->vc_video_erase_char);
- }
- static int sticon_switch(struct vc_data *conp)
- {
- return 1; /* needs refreshing */
- }
- static int sticon_set_origin(struct vc_data *conp)
- {
- return 0;
- }
- static int sticon_blank(struct vc_data *c, int blank)
- {
- switch (blank) {
- case 0: /* unblank */
- vga_is_gfx = 0;
- /* Tell console.c that it has to restore the screen itself */
- return 1;
- case 1: /* normal blanking */
- default: /* VESA blanking */
- if (vga_is_gfx)
- return 0;
- sticon_set_origin(c);
- sti_clear(default_sti, 0,0, c->vc_rows, c->vc_cols, BLANK);
- return 1;
- case -1: /* Entering graphic mode */
- sti_clear(default_sti, 0,0, c->vc_rows, c->vc_cols, BLANK);
- vga_is_gfx = 1;
- return 1;
- }
- return 1; /* console needs to restore screen itself */
- }
- static int sticon_scrolldelta(struct vc_data *conp, int lines)
- {
- return 0;
- }
- static u16 *sticon_screen_pos(struct vc_data *conp, int offset)
- {
- int line;
- unsigned long p;
- if (conp->vc_num != fg_console || !softback_lines)
- return (u16 *)(conp->vc_origin + offset);
- line = offset / conp->vc_size_row;
- if (line >= softback_lines)
- return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row);
- p = softback_curr + offset;
- if (p >= softback_end)
- p += softback_buf - softback_end;
- return (u16 *)p;
- }
- static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos,
- int *px, int *py)
- {
- int x, y;
- unsigned long ret;
- if (pos >= conp->vc_origin && pos < conp->vc_scr_end) {
- unsigned long offset = (pos - conp->vc_origin) / 2;
-
- x = offset % conp->vc_cols;
- y = offset / conp->vc_cols;
- if (conp->vc_num == fg_console)
- y += softback_lines;
- ret = pos + (conp->vc_cols - x) * 2;
- } else if (conp->vc_num == fg_console && softback_lines) {
- unsigned long offset = pos - softback_curr;
-
- if (pos < softback_curr)
- offset += softback_end - softback_buf;
- offset /= 2;
- x = offset % conp->vc_cols;
- y = offset / conp->vc_cols;
- ret = pos + (conp->vc_cols - x) * 2;
- if (ret == softback_end)
- ret = softback_buf;
- if (ret == softback_in)
- ret = conp->vc_origin;
- } else {
- /* Should not happen */
- x = y = 0;
- ret = conp->vc_origin;
- }
- if (px) *px = x;
- if (py) *py = y;
- return ret;
- }
- static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens,
- u8 blink, u8 underline, u8 reverse)
- {
- u8 attr = ((color & 0x70) >> 1) | ((color & 7));
- if (reverse) {
- color = ((color >> 3) & 0x7) | ((color & 0x7) << 3);
- }
- return attr;
- }
- void sticon_invert_region(struct vc_data *conp, u16 *p, int count)
- {
- int col = 1; /* vga_can_do_color; */
- while (count--) {
- u16 a = scr_readw(p);
- if (col)
- a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4);
- else
- a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700;
- scr_writew(a, p++);
- }
- }
- void sticon_save_screen(struct vc_data *conp)
- {
- }
- struct consw sti_con = {
- con_startup: sticon_startup,
- con_init: sticon_init,
- con_deinit: sticon_deinit,
- con_clear: sticon_clear,
- con_putc: sticon_putc,
- con_putcs: sticon_putcs,
- con_cursor: sticon_cursor,
- con_scroll: sticon_scroll,
- con_bmove: sticon_bmove,
- con_switch: sticon_switch,
- con_blank: sticon_blank,
- con_font_op: sticon_font_op,
- con_set_palette: sticon_set_palette,
- con_scrolldelta: sticon_scrolldelta,
- con_set_origin: sticon_set_origin,
- con_save_screen: sticon_save_screen,
- con_build_attr: sticon_build_attr,
- con_invert_region: sticon_invert_region,
- con_screen_pos: sticon_screen_pos,
- con_getxy: sticon_getxy,
- };
- int __init sticonsole_init(void)
- {
- if (sti_init_roms()) {
- if (conswitchp == &dummy_con) {
- printk(KERN_INFO "sticon: Initializing STI text console.n");
- take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1);
- }
- return 0;
- } else
- return -ENODEV;
- }
- module_init(sticonsole_init);