Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
new file mode 100644
index 0000000..7d1ae06
--- /dev/null
+++ b/drivers/video/console/vgacon.c
@@ -0,0 +1,1103 @@
+/*
+ * linux/drivers/video/vgacon.c -- Low level VGA based console driver
+ *
+ * Created 28 Sep 1997 by Geert Uytterhoeven
+ *
+ * Rewritten by Martin Mares <mj@ucw.cz>, July 1998
+ *
+ * This file is based on the old console.c, vga.c and vesa_blank.c drivers.
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * 1995 Jay Estabrook
+ *
+ * User definable mapping table and font loading by Eugene G. Crosser,
+ * <crosser@average.org>
+ *
+ * Improved loadable font/UTF-8 support by H. Peter Anvin
+ * Feb-Sep 1995 <peter.anvin@linux.org>
+ *
+ * Colour palette handling, by Simon Tatham
+ * 17-Jun-95 <sgt20@cam.ac.uk>
+ *
+ * if 512 char mode is already enabled don't re-enable it,
+ * because it causes screen to flicker, by Mitja Horvat
+ * 5-May-96 <mitja.horvat@guest.arnes.si>
+ *
+ * Use 2 outw instead of 4 outb_p to reduce erroneous text
+ * flashing on RHS of screen during heavy console scrolling .
+ * Oct 1996, Paul Gortmaker.
+ *
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/string.h>
+#include <linux/kd.h>
+#include <linux/slab.h>
+#include <linux/vt_kern.h>
+#include <linux/selection.h>
+#include <linux/spinlock.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <video/vga.h>
+#include <asm/io.h>
+
+static DEFINE_SPINLOCK(vga_lock);
+static int cursor_size_lastfrom;
+static int cursor_size_lastto;
+static struct vgastate state;
+
+#define BLANK 0x0020
+
+#define CAN_LOAD_EGA_FONTS /* undefine if the user must not do this */
+#define CAN_LOAD_PALETTE /* undefine if the user must not do this */
+
+/* You really do _NOT_ want to define this, unless you have buggy
+ * Trident VGA which will resize cursor when moving it between column
+ * 15 & 16. If you define this and your VGA is OK, inverse bug will
+ * appear.
+ */
+#undef TRIDENT_GLITCH
+
+/*
+ * Interface used by the world
+ */
+
+static const char *vgacon_startup(void);
+static void vgacon_init(struct vc_data *c, int init);
+static void vgacon_deinit(struct vc_data *c);
+static void vgacon_cursor(struct vc_data *c, int mode);
+static int vgacon_switch(struct vc_data *c);
+static int vgacon_blank(struct vc_data *c, int blank, int mode_switch);
+static int vgacon_set_palette(struct vc_data *vc, unsigned char *table);
+static int vgacon_scrolldelta(struct vc_data *c, int lines);
+static int vgacon_set_origin(struct vc_data *c);
+static void vgacon_save_screen(struct vc_data *c);
+static int vgacon_scroll(struct vc_data *c, int t, int b, int dir,
+ int lines);
+static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity,
+ u8 blink, u8 underline, u8 reverse);
+static void vgacon_invert_region(struct vc_data *c, u16 * p, int count);
+static unsigned long vgacon_uni_pagedir[2];
+
+
+/* Description of the hardware situation */
+static unsigned long vga_vram_base; /* Base of video memory */
+static unsigned long vga_vram_end; /* End of video memory */
+static u16 vga_video_port_reg; /* Video register select port */
+static u16 vga_video_port_val; /* Video register value port */
+static unsigned int vga_video_num_columns; /* Number of text columns */
+static unsigned int vga_video_num_lines; /* Number of text lines */
+static int vga_can_do_color = 0; /* Do we support colors? */
+static unsigned int vga_default_font_height;/* Height of default screen font */
+static unsigned char vga_video_type; /* Card type */
+static unsigned char vga_hardscroll_enabled;
+static unsigned char vga_hardscroll_user_enable = 1;
+static unsigned char vga_font_is_default = 1;
+static int vga_vesa_blanked;
+static int vga_palette_blanked;
+static int vga_is_gfx;
+static int vga_512_chars;
+static int vga_video_font_height;
+static int vga_scan_lines;
+static unsigned int vga_rolled_over = 0;
+
+static int __init no_scroll(char *str)
+{
+ /*
+ * Disabling scrollback is required for the Braillex ib80-piezo
+ * Braille reader made by F.H. Papenmeier (Germany).
+ * Use the "no-scroll" bootflag.
+ */
+ vga_hardscroll_user_enable = vga_hardscroll_enabled = 0;
+ return 1;
+}
+
+__setup("no-scroll", no_scroll);
+
+/*
+ * By replacing the four outb_p with two back to back outw, we can reduce
+ * the window of opportunity to see text mislocated to the RHS of the
+ * console during heavy scrolling activity. However there is the remote
+ * possibility that some pre-dinosaur hardware won't like the back to back
+ * I/O. Since the Xservers get away with it, we should be able to as well.
+ */
+static inline void write_vga(unsigned char reg, unsigned int val)
+{
+ unsigned int v1, v2;
+ unsigned long flags;
+
+ /*
+ * ddprintk might set the console position from interrupt
+ * handlers, thus the write has to be IRQ-atomic.
+ */
+ spin_lock_irqsave(&vga_lock, flags);
+
+#ifndef SLOW_VGA
+ v1 = reg + (val & 0xff00);
+ v2 = reg + 1 + ((val << 8) & 0xff00);
+ outw(v1, vga_video_port_reg);
+ outw(v2, vga_video_port_reg);
+#else
+ outb_p(reg, vga_video_port_reg);
+ outb_p(val >> 8, vga_video_port_val);
+ outb_p(reg + 1, vga_video_port_reg);
+ outb_p(val & 0xff, vga_video_port_val);
+#endif
+ spin_unlock_irqrestore(&vga_lock, flags);
+}
+
+static const char __init *vgacon_startup(void)
+{
+ const char *display_desc = NULL;
+ u16 saved1, saved2;
+ volatile u16 *p;
+
+ if (ORIG_VIDEO_ISVGA == VIDEO_TYPE_VLFB) {
+ no_vga:
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+ return conswitchp->con_startup();
+#else
+ return NULL;
+#endif
+ }
+
+ /* VGA16 modes are not handled by VGACON */
+ if ((ORIG_VIDEO_MODE == 0x0D) || /* 320x200/4 */
+ (ORIG_VIDEO_MODE == 0x0E) || /* 640x200/4 */
+ (ORIG_VIDEO_MODE == 0x10) || /* 640x350/4 */
+ (ORIG_VIDEO_MODE == 0x12) || /* 640x480/4 */
+ (ORIG_VIDEO_MODE == 0x6A)) /* 800x600/4, 0x6A is very common */
+ goto no_vga;
+
+ vga_video_num_lines = ORIG_VIDEO_LINES;
+ vga_video_num_columns = ORIG_VIDEO_COLS;
+ state.vgabase = NULL;
+
+ if (ORIG_VIDEO_MODE == 7) { /* Is this a monochrome display? */
+ vga_vram_base = 0xb0000;
+ vga_video_port_reg = VGA_CRT_IM;
+ vga_video_port_val = VGA_CRT_DM;
+ if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) {
+ static struct resource ega_console_resource =
+ { "ega", 0x3B0, 0x3BF };
+ vga_video_type = VIDEO_TYPE_EGAM;
+ vga_vram_end = 0xb8000;
+ display_desc = "EGA+";
+ request_resource(&ioport_resource,
+ &ega_console_resource);
+ } else {
+ static struct resource mda1_console_resource =
+ { "mda", 0x3B0, 0x3BB };
+ static struct resource mda2_console_resource =
+ { "mda", 0x3BF, 0x3BF };
+ vga_video_type = VIDEO_TYPE_MDA;
+ vga_vram_end = 0xb2000;
+ display_desc = "*MDA";
+ request_resource(&ioport_resource,
+ &mda1_console_resource);
+ request_resource(&ioport_resource,
+ &mda2_console_resource);
+ vga_video_font_height = 14;
+ }
+ } else {
+ /* If not, it is color. */
+ vga_can_do_color = 1;
+ vga_vram_base = 0xb8000;
+ vga_video_port_reg = VGA_CRT_IC;
+ vga_video_port_val = VGA_CRT_DC;
+ if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10) {
+ int i;
+
+ vga_vram_end = 0xc0000;
+
+ if (!ORIG_VIDEO_ISVGA) {
+ static struct resource ega_console_resource
+ = { "ega", 0x3C0, 0x3DF };
+ vga_video_type = VIDEO_TYPE_EGAC;
+ display_desc = "EGA";
+ request_resource(&ioport_resource,
+ &ega_console_resource);
+ } else {
+ static struct resource vga_console_resource
+ = { "vga+", 0x3C0, 0x3DF };
+ vga_video_type = VIDEO_TYPE_VGAC;
+ display_desc = "VGA+";
+ request_resource(&ioport_resource,
+ &vga_console_resource);
+
+#ifdef VGA_CAN_DO_64KB
+ /*
+ * get 64K rather than 32K of video RAM.
+ * This doesn't actually work on all "VGA"
+ * controllers (it seems like setting MM=01
+ * and COE=1 isn't necessarily a good idea)
+ */
+ vga_vram_base = 0xa0000;
+ vga_vram_end = 0xb0000;
+ outb_p(6, VGA_GFX_I);
+ outb_p(6, VGA_GFX_D);
+#endif
+ /*
+ * Normalise the palette registers, to point
+ * the 16 screen colours to the first 16
+ * DAC entries.
+ */
+
+ for (i = 0; i < 16; i++) {
+ inb_p(VGA_IS1_RC);
+ outb_p(i, VGA_ATT_W);
+ outb_p(i, VGA_ATT_W);
+ }
+ outb_p(0x20, VGA_ATT_W);
+
+ /*
+ * Now set the DAC registers back to their
+ * default values
+ */
+ for (i = 0; i < 16; i++) {
+ outb_p(color_table[i], VGA_PEL_IW);
+ outb_p(default_red[i], VGA_PEL_D);
+ outb_p(default_grn[i], VGA_PEL_D);
+ outb_p(default_blu[i], VGA_PEL_D);
+ }
+ }
+ } else {
+ static struct resource cga_console_resource =
+ { "cga", 0x3D4, 0x3D5 };
+ vga_video_type = VIDEO_TYPE_CGA;
+ vga_vram_end = 0xba000;
+ display_desc = "*CGA";
+ request_resource(&ioport_resource,
+ &cga_console_resource);
+ vga_video_font_height = 8;
+ }
+ }
+
+ vga_vram_base = VGA_MAP_MEM(vga_vram_base);
+ vga_vram_end = VGA_MAP_MEM(vga_vram_end);
+
+ /*
+ * Find out if there is a graphics card present.
+ * Are there smarter methods around?
+ */
+ p = (volatile u16 *) vga_vram_base;
+ saved1 = scr_readw(p);
+ saved2 = scr_readw(p + 1);
+ scr_writew(0xAA55, p);
+ scr_writew(0x55AA, p + 1);
+ if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) {
+ scr_writew(saved1, p);
+ scr_writew(saved2, p + 1);
+ goto no_vga;
+ }
+ scr_writew(0x55AA, p);
+ scr_writew(0xAA55, p + 1);
+ if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) {
+ scr_writew(saved1, p);
+ scr_writew(saved2, p + 1);
+ goto no_vga;
+ }
+ scr_writew(saved1, p);
+ scr_writew(saved2, p + 1);
+
+ if (vga_video_type == VIDEO_TYPE_EGAC
+ || vga_video_type == VIDEO_TYPE_VGAC
+ || vga_video_type == VIDEO_TYPE_EGAM) {
+ vga_hardscroll_enabled = vga_hardscroll_user_enable;
+ vga_default_font_height = ORIG_VIDEO_POINTS;
+ vga_video_font_height = ORIG_VIDEO_POINTS;
+ /* This may be suboptimal but is a safe bet - go with it */
+ vga_scan_lines =
+ vga_video_font_height * vga_video_num_lines;
+ }
+ return display_desc;
+}
+
+static void vgacon_init(struct vc_data *c, int init)
+{
+ unsigned long p;
+
+ /* We cannot be loaded as a module, therefore init is always 1 */
+ c->vc_can_do_color = vga_can_do_color;
+ c->vc_cols = vga_video_num_columns;
+ c->vc_rows = vga_video_num_lines;
+ c->vc_scan_lines = vga_scan_lines;
+ c->vc_font.height = vga_video_font_height;
+ c->vc_complement_mask = 0x7700;
+ p = *c->vc_uni_pagedir_loc;
+ if (c->vc_uni_pagedir_loc == &c->vc_uni_pagedir ||
+ !--c->vc_uni_pagedir_loc[1])
+ con_free_unimap(c);
+ c->vc_uni_pagedir_loc = vgacon_uni_pagedir;
+ vgacon_uni_pagedir[1]++;
+ if (!vgacon_uni_pagedir[0] && p)
+ con_set_default_unimap(c);
+}
+
+static inline void vga_set_mem_top(struct vc_data *c)
+{
+ write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2);
+}
+
+static void vgacon_deinit(struct vc_data *c)
+{
+ /* When closing the last console, reset video origin */
+ if (!--vgacon_uni_pagedir[1]) {
+ c->vc_visible_origin = vga_vram_base;
+ vga_set_mem_top(c);
+ con_free_unimap(c);
+ }
+ c->vc_uni_pagedir_loc = &c->vc_uni_pagedir;
+ con_set_default_unimap(c);
+}
+
+static u8 vgacon_build_attr(struct vc_data *c, u8 color, u8 intensity,
+ u8 blink, u8 underline, u8 reverse)
+{
+ u8 attr = color;
+
+ if (vga_can_do_color) {
+ if (underline)
+ attr = (attr & 0xf0) | c->vc_ulcolor;
+ else if (intensity == 0)
+ attr = (attr & 0xf0) | c->vc_halfcolor;
+ }
+ if (reverse)
+ attr =
+ ((attr) & 0x88) | ((((attr) >> 4) | ((attr) << 4)) &
+ 0x77);
+ if (blink)
+ attr ^= 0x80;
+ if (intensity == 2)
+ attr ^= 0x08;
+ if (!vga_can_do_color) {
+ if (underline)
+ attr = (attr & 0xf8) | 0x01;
+ else if (intensity == 0)
+ attr = (attr & 0xf0) | 0x08;
+ }
+ return attr;
+}
+
+static void vgacon_invert_region(struct vc_data *c, u16 * p, int count)
+{
+ int col = 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++);
+ }
+}
+
+static void vgacon_set_cursor_size(int xpos, int from, int to)
+{
+ unsigned long flags;
+ int curs, cure;
+
+#ifdef TRIDENT_GLITCH
+ if (xpos < 16)
+ from--, to--;
+#endif
+
+ if ((from == cursor_size_lastfrom) && (to == cursor_size_lastto))
+ return;
+ cursor_size_lastfrom = from;
+ cursor_size_lastto = to;
+
+ spin_lock_irqsave(&vga_lock, flags);
+ outb_p(0x0a, vga_video_port_reg); /* Cursor start */
+ curs = inb_p(vga_video_port_val);
+ outb_p(0x0b, vga_video_port_reg); /* Cursor end */
+ cure = inb_p(vga_video_port_val);
+
+ curs = (curs & 0xc0) | from;
+ cure = (cure & 0xe0) | to;
+
+ outb_p(0x0a, vga_video_port_reg); /* Cursor start */
+ outb_p(curs, vga_video_port_val);
+ outb_p(0x0b, vga_video_port_reg); /* Cursor end */
+ outb_p(cure, vga_video_port_val);
+ spin_unlock_irqrestore(&vga_lock, flags);
+}
+
+static void vgacon_cursor(struct vc_data *c, int mode)
+{
+ if (c->vc_origin != c->vc_visible_origin)
+ vgacon_scrolldelta(c, 0);
+ switch (mode) {
+ case CM_ERASE:
+ write_vga(14, (vga_vram_end - vga_vram_base - 1) / 2);
+ break;
+
+ case CM_MOVE:
+ case CM_DRAW:
+ write_vga(14, (c->vc_pos - vga_vram_base) / 2);
+ switch (c->vc_cursor_type & 0x0f) {
+ case CUR_UNDERLINE:
+ vgacon_set_cursor_size(c->vc_x,
+ c->vc_font.height -
+ (c->vc_font.height <
+ 10 ? 2 : 3),
+ c->vc_font.height -
+ (c->vc_font.height <
+ 10 ? 1 : 2));
+ break;
+ case CUR_TWO_THIRDS:
+ vgacon_set_cursor_size(c->vc_x,
+ c->vc_font.height / 3,
+ c->vc_font.height -
+ (c->vc_font.height <
+ 10 ? 1 : 2));
+ break;
+ case CUR_LOWER_THIRD:
+ vgacon_set_cursor_size(c->vc_x,
+ (c->vc_font.height * 2) / 3,
+ c->vc_font.height -
+ (c->vc_font.height <
+ 10 ? 1 : 2));
+ break;
+ case CUR_LOWER_HALF:
+ vgacon_set_cursor_size(c->vc_x,
+ c->vc_font.height / 2,
+ c->vc_font.height -
+ (c->vc_font.height <
+ 10 ? 1 : 2));
+ break;
+ case CUR_NONE:
+ vgacon_set_cursor_size(c->vc_x, 31, 30);
+ break;
+ default:
+ vgacon_set_cursor_size(c->vc_x, 1,
+ c->vc_font.height);
+ break;
+ }
+ break;
+ }
+}
+
+static int vgacon_switch(struct vc_data *c)
+{
+ /*
+ * We need to save screen size here as it's the only way
+ * we can spot the screen has been resized and we need to
+ * set size of freshly allocated screens ourselves.
+ */
+ vga_video_num_columns = c->vc_cols;
+ vga_video_num_lines = c->vc_rows;
+ if (!vga_is_gfx)
+ scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf,
+ c->vc_screenbuf_size);
+ return 0; /* Redrawing not needed */
+}
+
+static void vga_set_palette(struct vc_data *vc, unsigned char *table)
+{
+ int i, j;
+
+ for (i = j = 0; i < 16; i++) {
+ vga_w(state.vgabase, VGA_PEL_IW, table[i]);
+ vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
+ vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
+ vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
+ }
+}
+
+static int vgacon_set_palette(struct vc_data *vc, unsigned char *table)
+{
+#ifdef CAN_LOAD_PALETTE
+ if (vga_video_type != VIDEO_TYPE_VGAC || vga_palette_blanked
+ || !CON_IS_VISIBLE(vc))
+ return -EINVAL;
+ vga_set_palette(vc, table);
+ return 0;
+#else
+ return -EINVAL;
+#endif
+}
+
+/* structure holding original VGA register settings */
+static struct {
+ unsigned char SeqCtrlIndex; /* Sequencer Index reg. */
+ unsigned char CrtCtrlIndex; /* CRT-Contr. Index reg. */
+ unsigned char CrtMiscIO; /* Miscellaneous register */
+ unsigned char HorizontalTotal; /* CRT-Controller:00h */
+ unsigned char HorizDisplayEnd; /* CRT-Controller:01h */
+ unsigned char StartHorizRetrace; /* CRT-Controller:04h */
+ unsigned char EndHorizRetrace; /* CRT-Controller:05h */
+ unsigned char Overflow; /* CRT-Controller:07h */
+ unsigned char StartVertRetrace; /* CRT-Controller:10h */
+ unsigned char EndVertRetrace; /* CRT-Controller:11h */
+ unsigned char ModeControl; /* CRT-Controller:17h */
+ unsigned char ClockingMode; /* Seq-Controller:01h */
+} vga_state;
+
+static void vga_vesa_blank(struct vgastate *state, int mode)
+{
+ /* save original values of VGA controller registers */
+ if (!vga_vesa_blanked) {
+ spin_lock_irq(&vga_lock);
+ vga_state.SeqCtrlIndex = vga_r(state->vgabase, VGA_SEQ_I);
+ vga_state.CrtCtrlIndex = inb_p(vga_video_port_reg);
+ vga_state.CrtMiscIO = vga_r(state->vgabase, VGA_MIS_R);
+ spin_unlock_irq(&vga_lock);
+
+ outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */
+ vga_state.HorizontalTotal = inb_p(vga_video_port_val);
+ outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */
+ vga_state.HorizDisplayEnd = inb_p(vga_video_port_val);
+ outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */
+ vga_state.StartHorizRetrace = inb_p(vga_video_port_val);
+ outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */
+ vga_state.EndHorizRetrace = inb_p(vga_video_port_val);
+ outb_p(0x07, vga_video_port_reg); /* Overflow */
+ vga_state.Overflow = inb_p(vga_video_port_val);
+ outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */
+ vga_state.StartVertRetrace = inb_p(vga_video_port_val);
+ outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */
+ vga_state.EndVertRetrace = inb_p(vga_video_port_val);
+ outb_p(0x17, vga_video_port_reg); /* ModeControl */
+ vga_state.ModeControl = inb_p(vga_video_port_val);
+ vga_state.ClockingMode = vga_rseq(state->vgabase, VGA_SEQ_CLOCK_MODE);
+ }
+
+ /* assure that video is enabled */
+ /* "0x20" is VIDEO_ENABLE_bit in register 01 of sequencer */
+ spin_lock_irq(&vga_lock);
+ vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode | 0x20);
+
+ /* test for vertical retrace in process.... */
+ if ((vga_state.CrtMiscIO & 0x80) == 0x80)
+ vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO & 0xEF);
+
+ /*
+ * Set <End of vertical retrace> to minimum (0) and
+ * <Start of vertical Retrace> to maximum (incl. overflow)
+ * Result: turn off vertical sync (VSync) pulse.
+ */
+ if (mode & VESA_VSYNC_SUSPEND) {
+ outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */
+ outb_p(0xff, vga_video_port_val); /* maximum value */
+ outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */
+ outb_p(0x40, vga_video_port_val); /* minimum (bits 0..3) */
+ outb_p(0x07, vga_video_port_reg); /* Overflow */
+ outb_p(vga_state.Overflow | 0x84, vga_video_port_val); /* bits 9,10 of vert. retrace */
+ }
+
+ if (mode & VESA_HSYNC_SUSPEND) {
+ /*
+ * Set <End of horizontal retrace> to minimum (0) and
+ * <Start of horizontal Retrace> to maximum
+ * Result: turn off horizontal sync (HSync) pulse.
+ */
+ outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */
+ outb_p(0xff, vga_video_port_val); /* maximum */
+ outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */
+ outb_p(0x00, vga_video_port_val); /* minimum (0) */
+ }
+
+ /* restore both index registers */
+ vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex);
+ outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg);
+ spin_unlock_irq(&vga_lock);
+}
+
+static void vga_vesa_unblank(struct vgastate *state)
+{
+ /* restore original values of VGA controller registers */
+ spin_lock_irq(&vga_lock);
+ vga_w(state->vgabase, VGA_MIS_W, vga_state.CrtMiscIO);
+
+ outb_p(0x00, vga_video_port_reg); /* HorizontalTotal */
+ outb_p(vga_state.HorizontalTotal, vga_video_port_val);
+ outb_p(0x01, vga_video_port_reg); /* HorizDisplayEnd */
+ outb_p(vga_state.HorizDisplayEnd, vga_video_port_val);
+ outb_p(0x04, vga_video_port_reg); /* StartHorizRetrace */
+ outb_p(vga_state.StartHorizRetrace, vga_video_port_val);
+ outb_p(0x05, vga_video_port_reg); /* EndHorizRetrace */
+ outb_p(vga_state.EndHorizRetrace, vga_video_port_val);
+ outb_p(0x07, vga_video_port_reg); /* Overflow */
+ outb_p(vga_state.Overflow, vga_video_port_val);
+ outb_p(0x10, vga_video_port_reg); /* StartVertRetrace */
+ outb_p(vga_state.StartVertRetrace, vga_video_port_val);
+ outb_p(0x11, vga_video_port_reg); /* EndVertRetrace */
+ outb_p(vga_state.EndVertRetrace, vga_video_port_val);
+ outb_p(0x17, vga_video_port_reg); /* ModeControl */
+ outb_p(vga_state.ModeControl, vga_video_port_val);
+ /* ClockingMode */
+ vga_wseq(state->vgabase, VGA_SEQ_CLOCK_MODE, vga_state.ClockingMode);
+
+ /* restore index/control registers */
+ vga_w(state->vgabase, VGA_SEQ_I, vga_state.SeqCtrlIndex);
+ outb_p(vga_state.CrtCtrlIndex, vga_video_port_reg);
+ spin_unlock_irq(&vga_lock);
+}
+
+static void vga_pal_blank(struct vgastate *state)
+{
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ vga_w(state->vgabase, VGA_PEL_IW, i);
+ vga_w(state->vgabase, VGA_PEL_D, 0);
+ vga_w(state->vgabase, VGA_PEL_D, 0);
+ vga_w(state->vgabase, VGA_PEL_D, 0);
+ }
+}
+
+static int vgacon_blank(struct vc_data *c, int blank, int mode_switch)
+{
+ switch (blank) {
+ case 0: /* Unblank */
+ if (vga_vesa_blanked) {
+ vga_vesa_unblank(&state);
+ vga_vesa_blanked = 0;
+ }
+ if (vga_palette_blanked) {
+ vga_set_palette(c, color_table);
+ vga_palette_blanked = 0;
+ return 0;
+ }
+ vga_is_gfx = 0;
+ /* Tell console.c that it has to restore the screen itself */
+ return 1;
+ case 1: /* Normal blanking */
+ case -1: /* Obsolete */
+ if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) {
+ vga_pal_blank(&state);
+ vga_palette_blanked = 1;
+ return 0;
+ }
+ vgacon_set_origin(c);
+ scr_memsetw((void *) vga_vram_base, BLANK,
+ c->vc_screenbuf_size);
+ if (mode_switch)
+ vga_is_gfx = 1;
+ return 1;
+ default: /* VESA blanking */
+ if (vga_video_type == VIDEO_TYPE_VGAC) {
+ vga_vesa_blank(&state, blank - 1);
+ vga_vesa_blanked = blank;
+ }
+ return 0;
+ }
+}
+
+/*
+ * PIO_FONT support.
+ *
+ * The font loading code goes back to the codepage package by
+ * Joel Hoffman (joel@wam.umd.edu). (He reports that the original
+ * reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2
+ * Video Systems_ by Richard Wilton. 1987. Microsoft Press".)
+ *
+ * Change for certain monochrome monitors by Yury Shevchuck
+ * (sizif@botik.yaroslavl.su).
+ */
+
+#ifdef CAN_LOAD_EGA_FONTS
+
+#define colourmap 0xa0000
+/* Pauline Middelink <middelin@polyware.iaf.nl> reports that we
+ should use 0xA0000 for the bwmap as well.. */
+#define blackwmap 0xa0000
+#define cmapsz 8192
+
+static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512)
+{
+ unsigned short video_port_status = vga_video_port_reg + 6;
+ int font_select = 0x00, beg, i;
+ char *charmap;
+
+ if (vga_video_type != VIDEO_TYPE_EGAM) {
+ charmap = (char *) VGA_MAP_MEM(colourmap);
+ beg = 0x0e;
+#ifdef VGA_CAN_DO_64KB
+ if (vga_video_type == VIDEO_TYPE_VGAC)
+ beg = 0x06;
+#endif
+ } else {
+ charmap = (char *) VGA_MAP_MEM(blackwmap);
+ beg = 0x0a;
+ }
+
+#ifdef BROKEN_GRAPHICS_PROGRAMS
+ /*
+ * All fonts are loaded in slot 0 (0:1 for 512 ch)
+ */
+
+ if (!arg)
+ return -EINVAL; /* Return to default font not supported */
+
+ vga_font_is_default = 0;
+ font_select = ch512 ? 0x04 : 0x00;
+#else
+ /*
+ * The default font is kept in slot 0 and is never touched.
+ * A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch)
+ */
+
+ if (set) {
+ vga_font_is_default = !arg;
+ if (!arg)
+ ch512 = 0; /* Default font is always 256 */
+ font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00;
+ }
+
+ if (!vga_font_is_default)
+ charmap += 4 * cmapsz;
+#endif
+
+ unlock_kernel();
+ spin_lock_irq(&vga_lock);
+ /* First, the Sequencer */
+ vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x1);
+ /* CPU writes only to map 2 */
+ vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x04);
+ /* Sequential addressing */
+ vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x07);
+ /* Clear synchronous reset */
+ vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03);
+
+ /* Now, the graphics controller, select map 2 */
+ vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x02);
+ /* disable odd-even addressing */
+ vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x00);
+ /* map start at A000:0000 */
+ vga_wgfx(state->vgabase, VGA_GFX_MISC, 0x00);
+ spin_unlock_irq(&vga_lock);
+
+ if (arg) {
+ if (set)
+ for (i = 0; i < cmapsz; i++)
+ vga_writeb(arg[i], charmap + i);
+ else
+ for (i = 0; i < cmapsz; i++)
+ arg[i] = vga_readb(charmap + i);
+
+ /*
+ * In 512-character mode, the character map is not contiguous if
+ * we want to remain EGA compatible -- which we do
+ */
+
+ if (ch512) {
+ charmap += 2 * cmapsz;
+ arg += cmapsz;
+ if (set)
+ for (i = 0; i < cmapsz; i++)
+ vga_writeb(arg[i], charmap + i);
+ else
+ for (i = 0; i < cmapsz; i++)
+ arg[i] = vga_readb(charmap + i);
+ }
+ }
+
+ spin_lock_irq(&vga_lock);
+ /* First, the sequencer, Synchronous reset */
+ vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x01);
+ /* CPU writes to maps 0 and 1 */
+ vga_wseq(state->vgabase, VGA_SEQ_PLANE_WRITE, 0x03);
+ /* odd-even addressing */
+ vga_wseq(state->vgabase, VGA_SEQ_MEMORY_MODE, 0x03);
+ /* Character Map Select */
+ if (set)
+ vga_wseq(state->vgabase, VGA_SEQ_CHARACTER_MAP, font_select);
+ /* clear synchronous reset */
+ vga_wseq(state->vgabase, VGA_SEQ_RESET, 0x03);
+
+ /* Now, the graphics controller, select map 0 for CPU */
+ vga_wgfx(state->vgabase, VGA_GFX_PLANE_READ, 0x00);
+ /* enable even-odd addressing */
+ vga_wgfx(state->vgabase, VGA_GFX_MODE, 0x10);
+ /* map starts at b800:0 or b000:0 */
+ vga_wgfx(state->vgabase, VGA_GFX_MISC, beg);
+
+ /* if 512 char mode is already enabled don't re-enable it. */
+ if ((set) && (ch512 != vga_512_chars)) {
+ int i;
+
+ /* attribute controller */
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ struct vc_data *c = vc_cons[i].d;
+ if (c && c->vc_sw == &vga_con)
+ c->vc_hi_font_mask = ch512 ? 0x0800 : 0;
+ }
+ vga_512_chars = ch512;
+ /* 256-char: enable intensity bit
+ 512-char: disable intensity bit */
+ inb_p(video_port_status); /* clear address flip-flop */
+ /* color plane enable register */
+ vga_wattr(state->vgabase, VGA_ATC_PLANE_ENABLE, ch512 ? 0x07 : 0x0f);
+ /* Wilton (1987) mentions the following; I don't know what
+ it means, but it works, and it appears necessary */
+ inb_p(video_port_status);
+ vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0);
+ }
+ spin_unlock_irq(&vga_lock);
+ lock_kernel();
+ return 0;
+}
+
+/*
+ * Adjust the screen to fit a font of a certain height
+ */
+static int vgacon_adjust_height(struct vc_data *vc, unsigned fontheight)
+{
+ unsigned char ovr, vde, fsr;
+ int rows, maxscan, i;
+
+ rows = vc->vc_scan_lines / fontheight; /* Number of video rows we end up with */
+ maxscan = rows * fontheight - 1; /* Scan lines to actually display-1 */
+
+ /* Reprogram the CRTC for the new font size
+ Note: the attempt to read the overflow register will fail
+ on an EGA, but using 0xff for the previous value appears to
+ be OK for EGA text modes in the range 257-512 scan lines, so I
+ guess we don't need to worry about it.
+
+ The same applies for the spill bits in the font size and cursor
+ registers; they are write-only on EGA, but it appears that they
+ are all don't care bits on EGA, so I guess it doesn't matter. */
+
+ spin_lock_irq(&vga_lock);
+ outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */
+ ovr = inb_p(vga_video_port_val);
+ outb_p(0x09, vga_video_port_reg); /* Font size register */
+ fsr = inb_p(vga_video_port_val);
+ spin_unlock_irq(&vga_lock);
+
+ vde = maxscan & 0xff; /* Vertical display end reg */
+ ovr = (ovr & 0xbd) + /* Overflow register */
+ ((maxscan & 0x100) >> 7) + ((maxscan & 0x200) >> 3);
+ fsr = (fsr & 0xe0) + (fontheight - 1); /* Font size register */
+
+ spin_lock_irq(&vga_lock);
+ outb_p(0x07, vga_video_port_reg); /* CRTC overflow register */
+ outb_p(ovr, vga_video_port_val);
+ outb_p(0x09, vga_video_port_reg); /* Font size */
+ outb_p(fsr, vga_video_port_val);
+ outb_p(0x12, vga_video_port_reg); /* Vertical display limit */
+ outb_p(vde, vga_video_port_val);
+ spin_unlock_irq(&vga_lock);
+
+ for (i = 0; i < MAX_NR_CONSOLES; i++) {
+ struct vc_data *c = vc_cons[i].d;
+
+ if (c && c->vc_sw == &vga_con) {
+ if (CON_IS_VISIBLE(c)) {
+ /* void size to cause regs to be rewritten */
+ cursor_size_lastfrom = 0;
+ cursor_size_lastto = 0;
+ c->vc_sw->con_cursor(c, CM_DRAW);
+ }
+ c->vc_font.height = fontheight;
+ vc_resize(c, 0, rows); /* Adjust console size */
+ }
+ }
+ return 0;
+}
+
+static int vgacon_font_set(struct vc_data *c, struct console_font *font, unsigned flags)
+{
+ unsigned charcount = font->charcount;
+ int rc;
+
+ if (vga_video_type < VIDEO_TYPE_EGAM)
+ return -EINVAL;
+
+ if (font->width != 8 || (charcount != 256 && charcount != 512))
+ return -EINVAL;
+
+ rc = vgacon_do_font_op(&state, font->data, 1, charcount == 512);
+ if (rc)
+ return rc;
+
+ if (!(flags & KD_FONT_FLAG_DONT_RECALC))
+ rc = vgacon_adjust_height(c, font->height);
+ return rc;
+}
+
+static int vgacon_font_get(struct vc_data *c, struct console_font *font)
+{
+ if (vga_video_type < VIDEO_TYPE_EGAM)
+ return -EINVAL;
+
+ font->width = 8;
+ font->height = c->vc_font.height;
+ font->charcount = vga_512_chars ? 512 : 256;
+ if (!font->data)
+ return 0;
+ return vgacon_do_font_op(&state, font->data, 0, 0);
+}
+
+#else
+
+#define vgacon_font_set NULL
+#define vgacon_font_get NULL
+
+#endif
+
+static int vgacon_scrolldelta(struct vc_data *c, int lines)
+{
+ if (!lines) /* Turn scrollback off */
+ c->vc_visible_origin = c->vc_origin;
+ else {
+ int vram_size = vga_vram_end - vga_vram_base;
+ int margin = c->vc_size_row * 4;
+ int ul, we, p, st;
+
+ if (vga_rolled_over >
+ (c->vc_scr_end - vga_vram_base) + margin) {
+ ul = c->vc_scr_end - vga_vram_base;
+ we = vga_rolled_over + c->vc_size_row;
+ } else {
+ ul = 0;
+ we = vram_size;
+ }
+ p = (c->vc_visible_origin - vga_vram_base - ul + we) % we +
+ lines * c->vc_size_row;
+ st = (c->vc_origin - vga_vram_base - ul + we) % we;
+ if (st < 2 * margin)
+ margin = 0;
+ if (p < margin)
+ p = 0;
+ if (p > st - margin)
+ p = st;
+ c->vc_visible_origin = vga_vram_base + (p + ul) % we;
+ }
+ vga_set_mem_top(c);
+ return 1;
+}
+
+static int vgacon_set_origin(struct vc_data *c)
+{
+ if (vga_is_gfx || /* We don't play origin tricks in graphic modes */
+ (console_blanked && !vga_palette_blanked)) /* Nor we write to blanked screens */
+ return 0;
+ c->vc_origin = c->vc_visible_origin = vga_vram_base;
+ vga_set_mem_top(c);
+ vga_rolled_over = 0;
+ return 1;
+}
+
+static void vgacon_save_screen(struct vc_data *c)
+{
+ static int vga_bootup_console = 0;
+
+ if (!vga_bootup_console) {
+ /* This is a gross hack, but here is the only place we can
+ * set bootup console parameters without messing up generic
+ * console initialization routines.
+ */
+ vga_bootup_console = 1;
+ c->vc_x = ORIG_X;
+ c->vc_y = ORIG_Y;
+ }
+ if (!vga_is_gfx)
+ scr_memcpyw((u16 *) c->vc_screenbuf, (u16 *) c->vc_origin,
+ c->vc_screenbuf_size);
+}
+
+static int vgacon_scroll(struct vc_data *c, int t, int b, int dir,
+ int lines)
+{
+ unsigned long oldo;
+ unsigned int delta;
+
+ if (t || b != c->vc_rows || vga_is_gfx)
+ return 0;
+
+ if (c->vc_origin != c->vc_visible_origin)
+ vgacon_scrolldelta(c, 0);
+
+ if (!vga_hardscroll_enabled || lines >= c->vc_rows / 2)
+ return 0;
+
+ oldo = c->vc_origin;
+ delta = lines * c->vc_size_row;
+ if (dir == SM_UP) {
+ if (c->vc_scr_end + delta >= vga_vram_end) {
+ scr_memcpyw((u16 *) vga_vram_base,
+ (u16 *) (oldo + delta),
+ c->vc_screenbuf_size - delta);
+ c->vc_origin = vga_vram_base;
+ vga_rolled_over = oldo - vga_vram_base;
+ } else
+ c->vc_origin += delta;
+ scr_memsetw((u16 *) (c->vc_origin + c->vc_screenbuf_size -
+ delta), c->vc_video_erase_char,
+ delta);
+ } else {
+ if (oldo - delta < vga_vram_base) {
+ scr_memmovew((u16 *) (vga_vram_end -
+ c->vc_screenbuf_size +
+ delta), (u16 *) oldo,
+ c->vc_screenbuf_size - delta);
+ c->vc_origin = vga_vram_end - c->vc_screenbuf_size;
+ vga_rolled_over = 0;
+ } else
+ c->vc_origin -= delta;
+ c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
+ scr_memsetw((u16 *) (c->vc_origin), c->vc_video_erase_char,
+ delta);
+ }
+ c->vc_scr_end = c->vc_origin + c->vc_screenbuf_size;
+ c->vc_visible_origin = c->vc_origin;
+ vga_set_mem_top(c);
+ c->vc_pos = (c->vc_pos - oldo) + c->vc_origin;
+ return 1;
+}
+
+
+/*
+ * The console `switch' structure for the VGA based console
+ */
+
+static int vgacon_dummy(struct vc_data *c)
+{
+ return 0;
+}
+
+#define DUMMY (void *) vgacon_dummy
+
+const struct consw vga_con = {
+ .owner = THIS_MODULE,
+ .con_startup = vgacon_startup,
+ .con_init = vgacon_init,
+ .con_deinit = vgacon_deinit,
+ .con_clear = DUMMY,
+ .con_putc = DUMMY,
+ .con_putcs = DUMMY,
+ .con_cursor = vgacon_cursor,
+ .con_scroll = vgacon_scroll,
+ .con_bmove = DUMMY,
+ .con_switch = vgacon_switch,
+ .con_blank = vgacon_blank,
+ .con_font_set = vgacon_font_set,
+ .con_font_get = vgacon_font_get,
+ .con_set_palette = vgacon_set_palette,
+ .con_scrolldelta = vgacon_scrolldelta,
+ .con_set_origin = vgacon_set_origin,
+ .con_save_screen = vgacon_save_screen,
+ .con_build_attr = vgacon_build_attr,
+ .con_invert_region = vgacon_invert_region,
+};
+
+MODULE_LICENSE("GPL");