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!

1 files changed, 603 insertions, 0 deletions

diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c
new file mode 100644
index 00000000000..989e4d49e5b
--- /dev/null
+++ b/drivers/video/console/mdacon.c
@@ -0,0 +1,603 @@
+/*
+ *  linux/drivers/video/mdacon.c -- Low level MDA based console driver
+ *
+ *      (c) 1998 Andrew Apted <ajapted@netspace.net.au>
+ *
+ *      including portions (c) 1995-1998 Patrick Caulfield.
+ *
+ *      slight improvements (c) 2000 Edward Betts <edward@debian.org>
+ *
+ *  This file is based on the VGA console driver (vgacon.c):
+ *      
+ *      Created 28 Sep 1997 by Geert Uytterhoeven
+ *
+ *      Rewritten by Martin Mares <mj@ucw.cz>, July 1998
+ *
+ *  and on the old console.c, vga.c and vesa_blank.c drivers:
+ *
+ *      Copyright (C) 1991, 1992  Linus Torvalds
+ *                          1995  Jay Estabrook
+ *
+ *  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.
+ *
+ *  Changelog:
+ *  Paul G. (03/2001) Fix mdacon= boot prompt to use __setup().
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/module.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/vt_buffer.h>
+#include <linux/selection.h>
+#include <linux/spinlock.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/vga.h>
+
+static DEFINE_SPINLOCK(mda_lock);
+
+/* description of the hardware layout */
+
+static unsigned long    mda_vram_base;          /* Base of video memory */
+static unsigned long    mda_vram_len;           /* Size of video memory */
+static unsigned int     mda_num_columns;        /* Number of text columns */
+static unsigned int     mda_num_lines;          /* Number of text lines */
+
+static unsigned int     mda_index_port;         /* Register select port */
+static unsigned int     mda_value_port;         /* Register value port */
+static unsigned int     mda_mode_port;          /* Mode control port */
+static unsigned int     mda_status_port;        /* Status and Config port */
+static unsigned int     mda_gfx_port;           /* Graphics control port */
+
+/* current hardware state */
+
+static int      mda_cursor_loc=-1;
+static int      mda_cursor_size_from=-1;
+static int      mda_cursor_size_to=-1;
+
+static enum { TYPE_MDA, TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } mda_type;
+static char *mda_type_name;
+
+/* console information */
+
+static int      mda_first_vc = 1;
+static int      mda_last_vc  = 16;
+
+static struct vc_data   *mda_display_fg = NULL;
+
+module_param(mda_first_vc, int, 0);
+module_param(mda_last_vc, int, 0);
+
+/* MDA register values
+ */
+
+#define MDA_CURSOR_BLINKING     0x00
+#define MDA_CURSOR_OFF          0x20
+#define MDA_CURSOR_SLOWBLINK    0x60
+
+#define MDA_MODE_GRAPHICS       0x02
+#define MDA_MODE_VIDEO_EN       0x08
+#define MDA_MODE_BLINK_EN       0x20
+#define MDA_MODE_GFX_PAGE1      0x80
+
+#define MDA_STATUS_HSYNC        0x01
+#define MDA_STATUS_VSYNC        0x80
+#define MDA_STATUS_VIDEO        0x08
+
+#define MDA_CONFIG_COL132       0x08
+#define MDA_GFX_MODE_EN         0x01
+#define MDA_GFX_PAGE_EN         0x02
+
+
+/*
+ * MDA could easily be classified as "pre-dinosaur hardware".
+ */
+
+static void write_mda_b(unsigned int val, unsigned char reg)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&mda_lock, flags);    
+
+        outb_p(reg, mda_index_port); 
+        outb_p(val, mda_value_port);
+
+        spin_unlock_irqrestore(&mda_lock, flags);
+}
+
+static void write_mda_w(unsigned int val, unsigned char reg)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&mda_lock, flags);
+
+        outb_p(reg,   mda_index_port); outb_p(val >> 8,   mda_value_port);
+        outb_p(reg+1, mda_index_port); outb_p(val & 0xff, mda_value_port);
+
+        spin_unlock_irqrestore(&mda_lock, flags);
+}
+
+#ifdef TEST_MDA_B
+static int test_mda_b(unsigned char val, unsigned char reg)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&mda_lock, flags);
+
+        outb_p(reg, mda_index_port); 
+        outb  (val, mda_value_port);
+
+        udelay(20); val = (inb_p(mda_value_port) == val);
+
+        spin_unlock_irqrestore(&mda_lock, flags);
+        return val;
+}
+#endif
+
+static inline void mda_set_cursor(unsigned int location) 
+{
+        if (mda_cursor_loc == location)
+                return;
+
+        write_mda_w(location >> 1, 0x0e);
+
+        mda_cursor_loc = location;
+}
+
+static inline void mda_set_cursor_size(int from, int to)
+{
+        if (mda_cursor_size_from==from && mda_cursor_size_to==to)
+                return;
+        
+        if (from > to) {
+                write_mda_b(MDA_CURSOR_OFF, 0x0a);      /* disable cursor */
+        } else {
+                write_mda_b(from, 0x0a);        /* cursor start */
+                write_mda_b(to,   0x0b);        /* cursor end */
+        }
+
+        mda_cursor_size_from = from;
+        mda_cursor_size_to   = to;
+}
+
+
+#ifndef MODULE
+static int __init mdacon_setup(char *str)
+{
+        /* command line format: mdacon=<first>,<last> */
+
+        int ints[3];
+
+        str = get_options(str, ARRAY_SIZE(ints), ints);
+
+        if (ints[0] < 2)
+                return 0;
+
+        if (ints[1] < 1 || ints[1] > MAX_NR_CONSOLES || 
+            ints[2] < 1 || ints[2] > MAX_NR_CONSOLES)
+                return 0;
+
+        mda_first_vc = ints[1];
+        mda_last_vc  = ints[2];
+        return 1;
+}
+
+__setup("mdacon=", mdacon_setup);
+#endif
+
+static int __init mda_detect(void)
+{
+        int count=0;
+        u16 *p, p_save;
+        u16 *q, q_save;
+
+        /* do a memory check */
+
+        p = (u16 *) mda_vram_base;
+        q = (u16 *) (mda_vram_base + 0x01000);
+
+        p_save = scr_readw(p); q_save = scr_readw(q);
+
+        scr_writew(0xAA55, p); if (scr_readw(p) == 0xAA55) count++;
+        scr_writew(0x55AA, p); if (scr_readw(p) == 0x55AA) count++;
+        scr_writew(p_save, p);
+
+        if (count != 2) {
+                return 0;
+        }
+
+        /* check if we have 4K or 8K */
+
+        scr_writew(0xA55A, q); scr_writew(0x0000, p);
+        if (scr_readw(q) == 0xA55A) count++;
+        
+        scr_writew(0x5AA5, q); scr_writew(0x0000, p);
+        if (scr_readw(q) == 0x5AA5) count++;
+
+        scr_writew(p_save, p); scr_writew(q_save, q);
+        
+        if (count == 4) {
+                mda_vram_len = 0x02000;
+        }
+        
+        /* Ok, there is definitely a card registering at the correct
+         * memory location, so now we do an I/O port test.
+         */
+
+#ifdef TEST_MDA_B
+        /* Edward: These two mess `tests' mess up my cursor on bootup */
+
+        /* cursor low register */
+        if (! test_mda_b(0x66, 0x0f)) {
+                return 0;
+        }
+
+        /* cursor low register */
+        if (! test_mda_b(0x99, 0x0f)) {
+                return 0;
+        }
+#endif
+
+        /* See if the card is a Hercules, by checking whether the vsync
+         * bit of the status register is changing.  This test lasts for
+         * approximately 1/10th of a second.
+         */
+        
+        p_save = q_save = inb_p(mda_status_port) & MDA_STATUS_VSYNC;
+
+        for (count=0; count < 50000 && p_save == q_save; count++) {
+                q_save = inb(mda_status_port) & MDA_STATUS_VSYNC;
+                udelay(2);
+        }
+
+        if (p_save != q_save) {
+                switch (inb_p(mda_status_port) & 0x70) {
+                        case 0x10:
+                                mda_type = TYPE_HERCPLUS;
+                                mda_type_name = "HerculesPlus";
+                                break;
+                        case 0x50:
+                                mda_type = TYPE_HERCCOLOR;
+                                mda_type_name = "HerculesColor";
+                                break;
+                        default:
+                                mda_type = TYPE_HERC;
+                                mda_type_name = "Hercules";
+                                break;
+                }
+        }
+
+        return 1;
+}
+
+static void __init mda_initialize(void)
+{
+        write_mda_b(97, 0x00);          /* horizontal total */
+        write_mda_b(80, 0x01);          /* horizontal displayed */
+        write_mda_b(82, 0x02);          /* horizontal sync pos */
+        write_mda_b(15, 0x03);          /* horizontal sync width */
+
+        write_mda_b(25, 0x04);          /* vertical total */
+        write_mda_b(6,  0x05);          /* vertical total adjust */
+        write_mda_b(25, 0x06);          /* vertical displayed */
+        write_mda_b(25, 0x07);          /* vertical sync pos */
+
+        write_mda_b(2,  0x08);          /* interlace mode */
+        write_mda_b(13, 0x09);          /* maximum scanline */
+        write_mda_b(12, 0x0a);          /* cursor start */
+        write_mda_b(13, 0x0b);          /* cursor end */
+
+        write_mda_w(0x0000, 0x0c);      /* start address */
+        write_mda_w(0x0000, 0x0e);      /* cursor location */
+
+        outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, mda_mode_port);
+        outb_p(0x00, mda_status_port);
+        outb_p(0x00, mda_gfx_port);
+}
+
+static const char __init *mdacon_startup(void)
+{
+        mda_num_columns = 80;
+        mda_num_lines   = 25;
+
+        mda_vram_base = VGA_MAP_MEM(0xb0000);
+        mda_vram_len  = 0x01000;
+
+        mda_index_port  = 0x3b4;
+        mda_value_port  = 0x3b5;
+        mda_mode_port   = 0x3b8;
+        mda_status_port = 0x3ba;
+        mda_gfx_port    = 0x3bf;
+
+        mda_type = TYPE_MDA;
+        mda_type_name = "MDA";
+
+        if (! mda_detect()) {
+                printk("mdacon: MDA card not detected.\n");
+                return NULL;
+        }
+
+        if (mda_type != TYPE_MDA) {
+                mda_initialize();
+        }
+
+        /* cursor looks ugly during boot-up, so turn it off */
+        mda_set_cursor(mda_vram_len - 1);
+
+        printk("mdacon: %s with %ldK of memory detected.\n",
+                mda_type_name, mda_vram_len/1024);
+
+        return "MDA-2";
+}
+
+static void mdacon_init(struct vc_data *c, int init)
+{
+        c->vc_complement_mask = 0x0800;  /* reverse video */
+        c->vc_display_fg = &mda_display_fg;
+
+        if (init) {
+                c->vc_cols = mda_num_columns;
+                c->vc_rows = mda_num_lines;
+        } else
+                vc_resize(c, mda_num_columns, mda_num_lines);
+
+        /* make the first MDA console visible */
+
+        if (mda_display_fg == NULL)
+                mda_display_fg = c;
+}
+
+static void mdacon_deinit(struct vc_data *c)
+{
+        /* con_set_default_unimap(c->vc_num); */
+
+        if (mda_display_fg == c)
+                mda_display_fg = NULL;
+}
+
+static inline u16 mda_convert_attr(u16 ch)
+{
+        u16 attr = 0x0700;
+
+        /* Underline and reverse-video are mutually exclusive on MDA.
+         * Since reverse-video is used for cursors and selected areas,
+         * it takes precedence. 
+         */
+
+        if (ch & 0x0800)        attr = 0x7000;  /* reverse */
+        else if (ch & 0x0400)   attr = 0x0100;  /* underline */
+
+        return ((ch & 0x0200) << 2) |           /* intensity */ 
+                (ch & 0x8000) |                 /* blink */ 
+                (ch & 0x00ff) | attr;
+}
+
+static u8 mdacon_build_attr(struct vc_data *c, u8 color, u8 intensity, 
+                            u8 blink, u8 underline, u8 reverse)
+{
+        /* The attribute is just a bit vector:
+         *
+         *      Bit 0..1 : intensity (0..2)
+         *      Bit 2    : underline
+         *      Bit 3    : reverse
+         *      Bit 7    : blink
+         */
+
+        return (intensity & 3) |
+                ((underline & 1) << 2) |
+                ((reverse   & 1) << 3) |
+                ((blink     & 1) << 7);
+}
+
+static void mdacon_invert_region(struct vc_data *c, u16 *p, int count)
+{
+        for (; count > 0; count--) {
+                scr_writew(scr_readw(p) ^ 0x0800, p);
+                p++;
+        }
+}
+
+#define MDA_ADDR(x,y)  ((u16 *) mda_vram_base + (y)*mda_num_columns + (x))
+
+static void mdacon_putc(struct vc_data *c, int ch, int y, int x)
+{
+        scr_writew(mda_convert_attr(ch), MDA_ADDR(x, y));
+}
+
+static void mdacon_putcs(struct vc_data *c, const unsigned short *s,
+                         int count, int y, int x)
+{
+        u16 *dest = MDA_ADDR(x, y);
+
+        for (; count > 0; count--) {
+                scr_writew(mda_convert_attr(scr_readw(s++)), dest++);
+        }
+}
+
+static void mdacon_clear(struct vc_data *c, int y, int x, 
+                          int height, int width)
+{
+        u16 *dest = MDA_ADDR(x, y);
+        u16 eattr = mda_convert_attr(c->vc_video_erase_char);
+
+        if (width <= 0 || height <= 0)
+                return;
+
+        if (x==0 && width==mda_num_columns) {
+                scr_memsetw(dest, eattr, height*width*2);
+        } else {
+                for (; height > 0; height--, dest+=mda_num_columns)
+                        scr_memsetw(dest, eattr, width*2);
+        }
+}
+                        
+static void mdacon_bmove(struct vc_data *c, int sy, int sx, 
+                         int dy, int dx, int height, int width)
+{
+        u16 *src, *dest;
+
+        if (width <= 0 || height <= 0)
+                return;
+                
+        if (sx==0 && dx==0 && width==mda_num_columns) {
+                scr_memmovew(MDA_ADDR(0,dy), MDA_ADDR(0,sy), height*width*2);
+
+        } else if (dy < sy || (dy == sy && dx < sx)) {
+                src  = MDA_ADDR(sx, sy);
+                dest = MDA_ADDR(dx, dy);
+
+                for (; height > 0; height--) {
+                        scr_memmovew(dest, src, width*2);
+                        src  += mda_num_columns;
+                        dest += mda_num_columns;
+                }
+        } else {
+                src  = MDA_ADDR(sx, sy+height-1);
+                dest = MDA_ADDR(dx, dy+height-1);
+
+                for (; height > 0; height--) {
+                        scr_memmovew(dest, src, width*2);
+                        src  -= mda_num_columns;
+                        dest -= mda_num_columns;
+                }
+        }
+}
+
+static int mdacon_switch(struct vc_data *c)
+{
+        return 1;       /* redrawing needed */
+}
+
+static int mdacon_set_palette(struct vc_data *c, unsigned char *table)
+{
+        return -EINVAL;
+}
+
+static int mdacon_blank(struct vc_data *c, int blank, int mode_switch)
+{
+        if (mda_type == TYPE_MDA) {
+                if (blank) 
+                        scr_memsetw((void *)mda_vram_base, 
+                                mda_convert_attr(c->vc_video_erase_char),
+                                c->vc_screenbuf_size);
+                /* Tell console.c that it has to restore the screen itself */
+                return 1;
+        } else {
+                if (blank)
+                        outb_p(0x00, mda_mode_port);    /* disable video */
+                else
+                        outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, 
+                                mda_mode_port);
+                return 0;
+        }
+}
+
+static int mdacon_scrolldelta(struct vc_data *c, int lines)
+{
+        return 0;
+}
+
+static void mdacon_cursor(struct vc_data *c, int mode)
+{
+        if (mode == CM_ERASE) {
+                mda_set_cursor(mda_vram_len - 1);
+                return;
+        }
+
+        mda_set_cursor(c->vc_y*mda_num_columns*2 + c->vc_x*2);
+
+        switch (c->vc_cursor_type & 0x0f) {
+
+                case CUR_LOWER_THIRD:   mda_set_cursor_size(10, 13); break;
+                case CUR_LOWER_HALF:    mda_set_cursor_size(7,  13); break;
+                case CUR_TWO_THIRDS:    mda_set_cursor_size(4,  13); break;
+                case CUR_BLOCK:         mda_set_cursor_size(1,  13); break;
+                case CUR_NONE:          mda_set_cursor_size(14, 13); break;
+                default:                mda_set_cursor_size(12, 13); break;
+        }
+}
+
+static int mdacon_scroll(struct vc_data *c, int t, int b, int dir, int lines)
+{
+        u16 eattr = mda_convert_attr(c->vc_video_erase_char);
+
+        if (!lines)
+                return 0;
+
+        if (lines > c->vc_rows)   /* maximum realistic size */
+                lines = c->vc_rows;
+
+        switch (dir) {
+
+        case SM_UP:
+                scr_memmovew(MDA_ADDR(0,t), MDA_ADDR(0,t+lines),
+                                (b-t-lines)*mda_num_columns*2);
+                scr_memsetw(MDA_ADDR(0,b-lines), eattr,
+                                lines*mda_num_columns*2);
+                break;
+
+        case SM_DOWN:
+                scr_memmovew(MDA_ADDR(0,t+lines), MDA_ADDR(0,t),
+                                (b-t-lines)*mda_num_columns*2);
+                scr_memsetw(MDA_ADDR(0,t), eattr, lines*mda_num_columns*2);
+                break;
+        }
+
+        return 0;
+}
+
+
+/*
+ *  The console `switch' structure for the MDA based console
+ */
+
+static const struct consw mda_con = {
+        .owner =                THIS_MODULE,
+        .con_startup =          mdacon_startup,
+        .con_init =             mdacon_init,
+        .con_deinit =           mdacon_deinit,
+        .con_clear =            mdacon_clear,
+        .con_putc =             mdacon_putc,
+        .con_putcs =            mdacon_putcs,
+        .con_cursor =           mdacon_cursor,
+        .con_scroll =           mdacon_scroll,
+        .con_bmove =            mdacon_bmove,
+        .con_switch =           mdacon_switch,
+        .con_blank =            mdacon_blank,
+        .con_set_palette =      mdacon_set_palette,
+        .con_scrolldelta =      mdacon_scrolldelta,
+        .con_build_attr =       mdacon_build_attr,
+        .con_invert_region =    mdacon_invert_region,
+};
+
+int __init mda_console_init(void)
+{
+        if (mda_first_vc > mda_last_vc)
+                return 1;
+
+        return take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);
+}
+
+static void __exit mda_console_exit(void)
+{
+        give_up_console(&mda_con);
+}
+
+module_init(mda_console_init);
+module_exit(mda_console_exit);
+
+MODULE_LICENSE("GPL");
+