11da177e4SLinus Torvalds /*
21da177e4SLinus Torvalds * linux/drivers/video/mdacon.c -- Low level MDA based console driver
31da177e4SLinus Torvalds *
41da177e4SLinus Torvalds * (c) 1998 Andrew Apted <ajapted@netspace.net.au>
51da177e4SLinus Torvalds *
61da177e4SLinus Torvalds * including portions (c) 1995-1998 Patrick Caulfield.
71da177e4SLinus Torvalds *
81da177e4SLinus Torvalds * slight improvements (c) 2000 Edward Betts <edward@debian.org>
91da177e4SLinus Torvalds *
101da177e4SLinus Torvalds * This file is based on the VGA console driver (vgacon.c):
111da177e4SLinus Torvalds *
121da177e4SLinus Torvalds * Created 28 Sep 1997 by Geert Uytterhoeven
131da177e4SLinus Torvalds *
141da177e4SLinus Torvalds * Rewritten by Martin Mares <mj@ucw.cz>, July 1998
151da177e4SLinus Torvalds *
161da177e4SLinus Torvalds * and on the old console.c, vga.c and vesa_blank.c drivers:
171da177e4SLinus Torvalds *
181da177e4SLinus Torvalds * Copyright (C) 1991, 1992 Linus Torvalds
191da177e4SLinus Torvalds * 1995 Jay Estabrook
201da177e4SLinus Torvalds *
211da177e4SLinus Torvalds * This file is subject to the terms and conditions of the GNU General Public
221da177e4SLinus Torvalds * License. See the file COPYING in the main directory of this archive for
231da177e4SLinus Torvalds * more details.
241da177e4SLinus Torvalds *
251da177e4SLinus Torvalds * Changelog:
261da177e4SLinus Torvalds * Paul G. (03/2001) Fix mdacon= boot prompt to use __setup().
271da177e4SLinus Torvalds */
281da177e4SLinus Torvalds
291da177e4SLinus Torvalds #include <linux/types.h>
301da177e4SLinus Torvalds #include <linux/fs.h>
311da177e4SLinus Torvalds #include <linux/kernel.h>
321da177e4SLinus Torvalds #include <linux/module.h>
331da177e4SLinus Torvalds #include <linux/console.h>
341da177e4SLinus Torvalds #include <linux/string.h>
351da177e4SLinus Torvalds #include <linux/kd.h>
361da177e4SLinus Torvalds #include <linux/vt_kern.h>
371da177e4SLinus Torvalds #include <linux/vt_buffer.h>
381da177e4SLinus Torvalds #include <linux/selection.h>
391da177e4SLinus Torvalds #include <linux/spinlock.h>
401da177e4SLinus Torvalds #include <linux/ioport.h>
411da177e4SLinus Torvalds #include <linux/delay.h>
421da177e4SLinus Torvalds #include <linux/init.h>
431da177e4SLinus Torvalds
441da177e4SLinus Torvalds #include <asm/io.h>
451da177e4SLinus Torvalds #include <asm/vga.h>
461da177e4SLinus Torvalds
471da177e4SLinus Torvalds static DEFINE_SPINLOCK(mda_lock);
481da177e4SLinus Torvalds
491da177e4SLinus Torvalds /* description of the hardware layout */
501da177e4SLinus Torvalds
51734f13b1SJiri Slaby static u16 *mda_vram_base; /* Base of video memory */
521da177e4SLinus Torvalds static unsigned long mda_vram_len; /* Size of video memory */
531da177e4SLinus Torvalds static unsigned int mda_num_columns; /* Number of text columns */
541da177e4SLinus Torvalds static unsigned int mda_num_lines; /* Number of text lines */
551da177e4SLinus Torvalds
561da177e4SLinus Torvalds static unsigned int mda_index_port; /* Register select port */
571da177e4SLinus Torvalds static unsigned int mda_value_port; /* Register value port */
581da177e4SLinus Torvalds static unsigned int mda_mode_port; /* Mode control port */
591da177e4SLinus Torvalds static unsigned int mda_status_port; /* Status and Config port */
601da177e4SLinus Torvalds static unsigned int mda_gfx_port; /* Graphics control port */
611da177e4SLinus Torvalds
621da177e4SLinus Torvalds /* current hardware state */
631da177e4SLinus Torvalds
641da177e4SLinus Torvalds static int mda_cursor_loc=-1;
651da177e4SLinus Torvalds static int mda_cursor_size_from=-1;
661da177e4SLinus Torvalds static int mda_cursor_size_to=-1;
671da177e4SLinus Torvalds
681da177e4SLinus Torvalds static enum { TYPE_MDA, TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } mda_type;
691da177e4SLinus Torvalds static char *mda_type_name;
701da177e4SLinus Torvalds
711da177e4SLinus Torvalds /* console information */
721da177e4SLinus Torvalds
730b9cf3aaSRoland Kletzing static int mda_first_vc = 13;
741da177e4SLinus Torvalds static int mda_last_vc = 16;
751da177e4SLinus Torvalds
761da177e4SLinus Torvalds static struct vc_data *mda_display_fg = NULL;
771da177e4SLinus Torvalds
781da177e4SLinus Torvalds module_param(mda_first_vc, int, 0);
790b9cf3aaSRoland Kletzing MODULE_PARM_DESC(mda_first_vc, "First virtual console. Default: 13");
801da177e4SLinus Torvalds module_param(mda_last_vc, int, 0);
810b9cf3aaSRoland Kletzing MODULE_PARM_DESC(mda_last_vc, "Last virtual console. Default: 16");
821da177e4SLinus Torvalds
831da177e4SLinus Torvalds /* MDA register values
841da177e4SLinus Torvalds */
851da177e4SLinus Torvalds
861da177e4SLinus Torvalds #define MDA_CURSOR_BLINKING 0x00
871da177e4SLinus Torvalds #define MDA_CURSOR_OFF 0x20
881da177e4SLinus Torvalds #define MDA_CURSOR_SLOWBLINK 0x60
891da177e4SLinus Torvalds
901da177e4SLinus Torvalds #define MDA_MODE_GRAPHICS 0x02
911da177e4SLinus Torvalds #define MDA_MODE_VIDEO_EN 0x08
921da177e4SLinus Torvalds #define MDA_MODE_BLINK_EN 0x20
931da177e4SLinus Torvalds #define MDA_MODE_GFX_PAGE1 0x80
941da177e4SLinus Torvalds
951da177e4SLinus Torvalds #define MDA_STATUS_HSYNC 0x01
961da177e4SLinus Torvalds #define MDA_STATUS_VSYNC 0x80
971da177e4SLinus Torvalds #define MDA_STATUS_VIDEO 0x08
981da177e4SLinus Torvalds
991da177e4SLinus Torvalds #define MDA_CONFIG_COL132 0x08
1001da177e4SLinus Torvalds #define MDA_GFX_MODE_EN 0x01
1011da177e4SLinus Torvalds #define MDA_GFX_PAGE_EN 0x02
1021da177e4SLinus Torvalds
1031da177e4SLinus Torvalds
1041da177e4SLinus Torvalds /*
1051da177e4SLinus Torvalds * MDA could easily be classified as "pre-dinosaur hardware".
1061da177e4SLinus Torvalds */
1071da177e4SLinus Torvalds
write_mda_b(unsigned int val,unsigned char reg)1081da177e4SLinus Torvalds static void write_mda_b(unsigned int val, unsigned char reg)
1091da177e4SLinus Torvalds {
1101da177e4SLinus Torvalds unsigned long flags;
1111da177e4SLinus Torvalds
1121da177e4SLinus Torvalds spin_lock_irqsave(&mda_lock, flags);
1131da177e4SLinus Torvalds
1141da177e4SLinus Torvalds outb_p(reg, mda_index_port);
1151da177e4SLinus Torvalds outb_p(val, mda_value_port);
1161da177e4SLinus Torvalds
1171da177e4SLinus Torvalds spin_unlock_irqrestore(&mda_lock, flags);
1181da177e4SLinus Torvalds }
1191da177e4SLinus Torvalds
write_mda_w(unsigned int val,unsigned char reg)1201da177e4SLinus Torvalds static void write_mda_w(unsigned int val, unsigned char reg)
1211da177e4SLinus Torvalds {
1221da177e4SLinus Torvalds unsigned long flags;
1231da177e4SLinus Torvalds
1241da177e4SLinus Torvalds spin_lock_irqsave(&mda_lock, flags);
1251da177e4SLinus Torvalds
1261da177e4SLinus Torvalds outb_p(reg, mda_index_port); outb_p(val >> 8, mda_value_port);
1271da177e4SLinus Torvalds outb_p(reg+1, mda_index_port); outb_p(val & 0xff, mda_value_port);
1281da177e4SLinus Torvalds
1291da177e4SLinus Torvalds spin_unlock_irqrestore(&mda_lock, flags);
1301da177e4SLinus Torvalds }
1311da177e4SLinus Torvalds
1321da177e4SLinus Torvalds #ifdef TEST_MDA_B
test_mda_b(unsigned char val,unsigned char reg)1331da177e4SLinus Torvalds static int test_mda_b(unsigned char val, unsigned char reg)
1341da177e4SLinus Torvalds {
1351da177e4SLinus Torvalds unsigned long flags;
1361da177e4SLinus Torvalds
1371da177e4SLinus Torvalds spin_lock_irqsave(&mda_lock, flags);
1381da177e4SLinus Torvalds
1391da177e4SLinus Torvalds outb_p(reg, mda_index_port);
1401da177e4SLinus Torvalds outb (val, mda_value_port);
1411da177e4SLinus Torvalds
1421da177e4SLinus Torvalds udelay(20); val = (inb_p(mda_value_port) == val);
1431da177e4SLinus Torvalds
1441da177e4SLinus Torvalds spin_unlock_irqrestore(&mda_lock, flags);
1451da177e4SLinus Torvalds return val;
1461da177e4SLinus Torvalds }
1471da177e4SLinus Torvalds #endif
1481da177e4SLinus Torvalds
mda_set_cursor(unsigned int location)1491da177e4SLinus Torvalds static inline void mda_set_cursor(unsigned int location)
1501da177e4SLinus Torvalds {
1511da177e4SLinus Torvalds if (mda_cursor_loc == location)
1521da177e4SLinus Torvalds return;
1531da177e4SLinus Torvalds
1541da177e4SLinus Torvalds write_mda_w(location >> 1, 0x0e);
1551da177e4SLinus Torvalds
1561da177e4SLinus Torvalds mda_cursor_loc = location;
1571da177e4SLinus Torvalds }
1581da177e4SLinus Torvalds
mda_set_cursor_size(int from,int to)1591da177e4SLinus Torvalds static inline void mda_set_cursor_size(int from, int to)
1601da177e4SLinus Torvalds {
1611da177e4SLinus Torvalds if (mda_cursor_size_from==from && mda_cursor_size_to==to)
1621da177e4SLinus Torvalds return;
1631da177e4SLinus Torvalds
1641da177e4SLinus Torvalds if (from > to) {
1651da177e4SLinus Torvalds write_mda_b(MDA_CURSOR_OFF, 0x0a); /* disable cursor */
1661da177e4SLinus Torvalds } else {
1671da177e4SLinus Torvalds write_mda_b(from, 0x0a); /* cursor start */
1681da177e4SLinus Torvalds write_mda_b(to, 0x0b); /* cursor end */
1691da177e4SLinus Torvalds }
1701da177e4SLinus Torvalds
1711da177e4SLinus Torvalds mda_cursor_size_from = from;
1721da177e4SLinus Torvalds mda_cursor_size_to = to;
1731da177e4SLinus Torvalds }
1741da177e4SLinus Torvalds
1751da177e4SLinus Torvalds
1761da177e4SLinus Torvalds #ifndef MODULE
mdacon_setup(char * str)1771da177e4SLinus Torvalds static int __init mdacon_setup(char *str)
1781da177e4SLinus Torvalds {
1791da177e4SLinus Torvalds /* command line format: mdacon=<first>,<last> */
1801da177e4SLinus Torvalds
1811da177e4SLinus Torvalds int ints[3];
1821da177e4SLinus Torvalds
1831da177e4SLinus Torvalds str = get_options(str, ARRAY_SIZE(ints), ints);
1841da177e4SLinus Torvalds
1851da177e4SLinus Torvalds if (ints[0] < 2)
1861da177e4SLinus Torvalds return 0;
1871da177e4SLinus Torvalds
1881da177e4SLinus Torvalds if (ints[1] < 1 || ints[1] > MAX_NR_CONSOLES ||
1891da177e4SLinus Torvalds ints[2] < 1 || ints[2] > MAX_NR_CONSOLES)
1901da177e4SLinus Torvalds return 0;
1911da177e4SLinus Torvalds
1921da177e4SLinus Torvalds mda_first_vc = ints[1];
1931da177e4SLinus Torvalds mda_last_vc = ints[2];
1941da177e4SLinus Torvalds return 1;
1951da177e4SLinus Torvalds }
1961da177e4SLinus Torvalds
1971da177e4SLinus Torvalds __setup("mdacon=", mdacon_setup);
1981da177e4SLinus Torvalds #endif
1991da177e4SLinus Torvalds
mda_detect(void)2007ca7b5c4SFrederik Deweerdt static int mda_detect(void)
2011da177e4SLinus Torvalds {
2021da177e4SLinus Torvalds int count=0;
2031da177e4SLinus Torvalds u16 *p, p_save;
2041da177e4SLinus Torvalds u16 *q, q_save;
2051da177e4SLinus Torvalds
2061da177e4SLinus Torvalds /* do a memory check */
2071da177e4SLinus Torvalds
208734f13b1SJiri Slaby p = mda_vram_base;
209734f13b1SJiri Slaby q = mda_vram_base + 0x01000 / 2;
2101da177e4SLinus Torvalds
21108cfe9f0SJiri Slaby p_save = scr_readw(p);
21208cfe9f0SJiri Slaby q_save = scr_readw(q);
2131da177e4SLinus Torvalds
21408cfe9f0SJiri Slaby scr_writew(0xAA55, p);
21508cfe9f0SJiri Slaby if (scr_readw(p) == 0xAA55)
21608cfe9f0SJiri Slaby count++;
21708cfe9f0SJiri Slaby
21808cfe9f0SJiri Slaby scr_writew(0x55AA, p);
21908cfe9f0SJiri Slaby if (scr_readw(p) == 0x55AA)
22008cfe9f0SJiri Slaby count++;
22108cfe9f0SJiri Slaby
2221da177e4SLinus Torvalds scr_writew(p_save, p);
2231da177e4SLinus Torvalds
2241da177e4SLinus Torvalds if (count != 2) {
2251da177e4SLinus Torvalds return 0;
2261da177e4SLinus Torvalds }
2271da177e4SLinus Torvalds
2281da177e4SLinus Torvalds /* check if we have 4K or 8K */
2291da177e4SLinus Torvalds
23008cfe9f0SJiri Slaby scr_writew(0xA55A, q);
23108cfe9f0SJiri Slaby scr_writew(0x0000, p);
23208cfe9f0SJiri Slaby if (scr_readw(q) == 0xA55A)
23308cfe9f0SJiri Slaby count++;
2341da177e4SLinus Torvalds
23508cfe9f0SJiri Slaby scr_writew(0x5AA5, q);
23608cfe9f0SJiri Slaby scr_writew(0x0000, p);
23708cfe9f0SJiri Slaby if (scr_readw(q) == 0x5AA5)
23808cfe9f0SJiri Slaby count++;
2391da177e4SLinus Torvalds
24008cfe9f0SJiri Slaby scr_writew(p_save, p);
24108cfe9f0SJiri Slaby scr_writew(q_save, q);
2421da177e4SLinus Torvalds
2431da177e4SLinus Torvalds if (count == 4) {
2441da177e4SLinus Torvalds mda_vram_len = 0x02000;
2451da177e4SLinus Torvalds }
2461da177e4SLinus Torvalds
2471da177e4SLinus Torvalds /* Ok, there is definitely a card registering at the correct
2481da177e4SLinus Torvalds * memory location, so now we do an I/O port test.
2491da177e4SLinus Torvalds */
2501da177e4SLinus Torvalds
2511da177e4SLinus Torvalds #ifdef TEST_MDA_B
2521da177e4SLinus Torvalds /* Edward: These two mess `tests' mess up my cursor on bootup */
2531da177e4SLinus Torvalds
2541da177e4SLinus Torvalds /* cursor low register */
25508cfe9f0SJiri Slaby if (!test_mda_b(0x66, 0x0f))
2561da177e4SLinus Torvalds return 0;
2571da177e4SLinus Torvalds
2581da177e4SLinus Torvalds /* cursor low register */
25908cfe9f0SJiri Slaby if (!test_mda_b(0x99, 0x0f))
2601da177e4SLinus Torvalds return 0;
2611da177e4SLinus Torvalds #endif
2621da177e4SLinus Torvalds
2631da177e4SLinus Torvalds /* See if the card is a Hercules, by checking whether the vsync
2641da177e4SLinus Torvalds * bit of the status register is changing. This test lasts for
2651da177e4SLinus Torvalds * approximately 1/10th of a second.
2661da177e4SLinus Torvalds */
2671da177e4SLinus Torvalds
2681da177e4SLinus Torvalds p_save = q_save = inb_p(mda_status_port) & MDA_STATUS_VSYNC;
2691da177e4SLinus Torvalds
2701da177e4SLinus Torvalds for (count = 0; count < 50000 && p_save == q_save; count++) {
2711da177e4SLinus Torvalds q_save = inb(mda_status_port) & MDA_STATUS_VSYNC;
2721da177e4SLinus Torvalds udelay(2);
2731da177e4SLinus Torvalds }
2741da177e4SLinus Torvalds
2751da177e4SLinus Torvalds if (p_save != q_save) {
2761da177e4SLinus Torvalds switch (inb_p(mda_status_port) & 0x70) {
2771da177e4SLinus Torvalds case 0x10:
2781da177e4SLinus Torvalds mda_type = TYPE_HERCPLUS;
2791da177e4SLinus Torvalds mda_type_name = "HerculesPlus";
2801da177e4SLinus Torvalds break;
2811da177e4SLinus Torvalds case 0x50:
2821da177e4SLinus Torvalds mda_type = TYPE_HERCCOLOR;
2831da177e4SLinus Torvalds mda_type_name = "HerculesColor";
2841da177e4SLinus Torvalds break;
2851da177e4SLinus Torvalds default:
2861da177e4SLinus Torvalds mda_type = TYPE_HERC;
2871da177e4SLinus Torvalds mda_type_name = "Hercules";
2881da177e4SLinus Torvalds break;
2891da177e4SLinus Torvalds }
2901da177e4SLinus Torvalds }
2911da177e4SLinus Torvalds
2921da177e4SLinus Torvalds return 1;
2931da177e4SLinus Torvalds }
2941da177e4SLinus Torvalds
mda_initialize(void)2957ca7b5c4SFrederik Deweerdt static void mda_initialize(void)
2961da177e4SLinus Torvalds {
2971da177e4SLinus Torvalds write_mda_b(97, 0x00); /* horizontal total */
2981da177e4SLinus Torvalds write_mda_b(80, 0x01); /* horizontal displayed */
2991da177e4SLinus Torvalds write_mda_b(82, 0x02); /* horizontal sync pos */
3001da177e4SLinus Torvalds write_mda_b(15, 0x03); /* horizontal sync width */
3011da177e4SLinus Torvalds
3021da177e4SLinus Torvalds write_mda_b(25, 0x04); /* vertical total */
3031da177e4SLinus Torvalds write_mda_b(6, 0x05); /* vertical total adjust */
3041da177e4SLinus Torvalds write_mda_b(25, 0x06); /* vertical displayed */
3051da177e4SLinus Torvalds write_mda_b(25, 0x07); /* vertical sync pos */
3061da177e4SLinus Torvalds
3071da177e4SLinus Torvalds write_mda_b(2, 0x08); /* interlace mode */
3081da177e4SLinus Torvalds write_mda_b(13, 0x09); /* maximum scanline */
3091da177e4SLinus Torvalds write_mda_b(12, 0x0a); /* cursor start */
3101da177e4SLinus Torvalds write_mda_b(13, 0x0b); /* cursor end */
3111da177e4SLinus Torvalds
3121da177e4SLinus Torvalds write_mda_w(0x0000, 0x0c); /* start address */
3131da177e4SLinus Torvalds write_mda_w(0x0000, 0x0e); /* cursor location */
3141da177e4SLinus Torvalds
3151da177e4SLinus Torvalds outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, mda_mode_port);
3161da177e4SLinus Torvalds outb_p(0x00, mda_status_port);
3171da177e4SLinus Torvalds outb_p(0x00, mda_gfx_port);
3181da177e4SLinus Torvalds }
3191da177e4SLinus Torvalds
mdacon_startup(void)320ac08dae8SAntonino A. Daplas static const char *mdacon_startup(void)
3211da177e4SLinus Torvalds {
3221da177e4SLinus Torvalds mda_num_columns = 80;
3231da177e4SLinus Torvalds mda_num_lines = 25;
3241da177e4SLinus Torvalds
3251da177e4SLinus Torvalds mda_vram_len = 0x01000;
326734f13b1SJiri Slaby mda_vram_base = (u16 *)VGA_MAP_MEM(0xb0000, mda_vram_len);
3271da177e4SLinus Torvalds
3281da177e4SLinus Torvalds mda_index_port = 0x3b4;
3291da177e4SLinus Torvalds mda_value_port = 0x3b5;
3301da177e4SLinus Torvalds mda_mode_port = 0x3b8;
3311da177e4SLinus Torvalds mda_status_port = 0x3ba;
3321da177e4SLinus Torvalds mda_gfx_port = 0x3bf;
3331da177e4SLinus Torvalds
3341da177e4SLinus Torvalds mda_type = TYPE_MDA;
3351da177e4SLinus Torvalds mda_type_name = "MDA";
3361da177e4SLinus Torvalds
3371da177e4SLinus Torvalds if (! mda_detect()) {
3381da177e4SLinus Torvalds printk("mdacon: MDA card not detected.\n");
3391da177e4SLinus Torvalds return NULL;
3401da177e4SLinus Torvalds }
3411da177e4SLinus Torvalds
3421da177e4SLinus Torvalds if (mda_type != TYPE_MDA) {
3431da177e4SLinus Torvalds mda_initialize();
3441da177e4SLinus Torvalds }
3451da177e4SLinus Torvalds
3461da177e4SLinus Torvalds /* cursor looks ugly during boot-up, so turn it off */
3471da177e4SLinus Torvalds mda_set_cursor(mda_vram_len - 1);
3481da177e4SLinus Torvalds
3491da177e4SLinus Torvalds printk("mdacon: %s with %ldK of memory detected.\n",
3501da177e4SLinus Torvalds mda_type_name, mda_vram_len/1024);
3511da177e4SLinus Torvalds
3521da177e4SLinus Torvalds return "MDA-2";
3531da177e4SLinus Torvalds }
3541da177e4SLinus Torvalds
mdacon_init(struct vc_data * c,bool init)355dae3e6b6SJiri Slaby (SUSE) static void mdacon_init(struct vc_data *c, bool init)
3561da177e4SLinus Torvalds {
3571da177e4SLinus Torvalds c->vc_complement_mask = 0x0800; /* reverse video */
3581da177e4SLinus Torvalds c->vc_display_fg = &mda_display_fg;
3591da177e4SLinus Torvalds
3601da177e4SLinus Torvalds if (init) {
3611da177e4SLinus Torvalds c->vc_cols = mda_num_columns;
3621da177e4SLinus Torvalds c->vc_rows = mda_num_lines;
3631da177e4SLinus Torvalds } else
3641da177e4SLinus Torvalds vc_resize(c, mda_num_columns, mda_num_lines);
3651da177e4SLinus Torvalds
3661da177e4SLinus Torvalds /* make the first MDA console visible */
3671da177e4SLinus Torvalds
3681da177e4SLinus Torvalds if (mda_display_fg == NULL)
3691da177e4SLinus Torvalds mda_display_fg = c;
3701da177e4SLinus Torvalds }
3711da177e4SLinus Torvalds
mdacon_deinit(struct vc_data * c)3721da177e4SLinus Torvalds static void mdacon_deinit(struct vc_data *c)
3731da177e4SLinus Torvalds {
3741da177e4SLinus Torvalds /* con_set_default_unimap(c->vc_num); */
3751da177e4SLinus Torvalds
3761da177e4SLinus Torvalds if (mda_display_fg == c)
3771da177e4SLinus Torvalds mda_display_fg = NULL;
3781da177e4SLinus Torvalds }
3791da177e4SLinus Torvalds
mda_convert_attr(u16 ch)3801da177e4SLinus Torvalds static inline u16 mda_convert_attr(u16 ch)
3811da177e4SLinus Torvalds {
3821da177e4SLinus Torvalds u16 attr = 0x0700;
3831da177e4SLinus Torvalds
3841da177e4SLinus Torvalds /* Underline and reverse-video are mutually exclusive on MDA.
3851da177e4SLinus Torvalds * Since reverse-video is used for cursors and selected areas,
3861da177e4SLinus Torvalds * it takes precedence.
3871da177e4SLinus Torvalds */
3881da177e4SLinus Torvalds
3891da177e4SLinus Torvalds if (ch & 0x0800) attr = 0x7000; /* reverse */
3901da177e4SLinus Torvalds else if (ch & 0x0400) attr = 0x0100; /* underline */
3911da177e4SLinus Torvalds
3921da177e4SLinus Torvalds return ((ch & 0x0200) << 2) | /* intensity */
3931da177e4SLinus Torvalds (ch & 0x8000) | /* blink */
3941da177e4SLinus Torvalds (ch & 0x00ff) | attr;
3951da177e4SLinus Torvalds }
3961da177e4SLinus Torvalds
mdacon_build_attr(struct vc_data * c,u8 color,enum vc_intensity intensity,bool blink,bool underline,bool reverse,bool italic)397b84ae3dcSJiri Slaby static u8 mdacon_build_attr(struct vc_data *c, u8 color,
398b84ae3dcSJiri Slaby enum vc_intensity intensity,
39977bc14f2SJiri Slaby bool blink, bool underline, bool reverse,
40077bc14f2SJiri Slaby bool italic)
4011da177e4SLinus Torvalds {
4021da177e4SLinus Torvalds /* The attribute is just a bit vector:
4031da177e4SLinus Torvalds *
4041da177e4SLinus Torvalds * Bit 0..1 : intensity (0..2)
4051da177e4SLinus Torvalds * Bit 2 : underline
4061da177e4SLinus Torvalds * Bit 3 : reverse
4071da177e4SLinus Torvalds * Bit 7 : blink
4081da177e4SLinus Torvalds */
4091da177e4SLinus Torvalds
410b84ae3dcSJiri Slaby return (intensity & VCI_MASK) |
41177bc14f2SJiri Slaby (underline << 2) |
41277bc14f2SJiri Slaby (reverse << 3) |
41377bc14f2SJiri Slaby (italic << 4) |
41477bc14f2SJiri Slaby (blink << 7);
4151da177e4SLinus Torvalds }
4161da177e4SLinus Torvalds
mdacon_invert_region(struct vc_data * c,u16 * p,int count)4171da177e4SLinus Torvalds static void mdacon_invert_region(struct vc_data *c, u16 *p, int count)
4181da177e4SLinus Torvalds {
4191da177e4SLinus Torvalds for (; count > 0; count--) {
4201da177e4SLinus Torvalds scr_writew(scr_readw(p) ^ 0x0800, p);
4211da177e4SLinus Torvalds p++;
4221da177e4SLinus Torvalds }
4231da177e4SLinus Torvalds }
4241da177e4SLinus Torvalds
mda_addr(unsigned int x,unsigned int y)425927f7a17SJiri Slaby static inline u16 *mda_addr(unsigned int x, unsigned int y)
426927f7a17SJiri Slaby {
427927f7a17SJiri Slaby return mda_vram_base + y * mda_num_columns + x;
428927f7a17SJiri Slaby }
4291da177e4SLinus Torvalds
mdacon_putcs(struct vc_data * c,const u16 * s,unsigned int count,unsigned int y,unsigned int x)430bfd7de49SJiri Slaby (SUSE) static void mdacon_putcs(struct vc_data *c, const u16 *s, unsigned int count,
431bfd7de49SJiri Slaby (SUSE) unsigned int y, unsigned int x)
4321da177e4SLinus Torvalds {
433927f7a17SJiri Slaby u16 *dest = mda_addr(x, y);
4341da177e4SLinus Torvalds
4351da177e4SLinus Torvalds for (; count > 0; count--) {
4361da177e4SLinus Torvalds scr_writew(mda_convert_attr(scr_readw(s++)), dest++);
4371da177e4SLinus Torvalds }
4381da177e4SLinus Torvalds }
4391da177e4SLinus Torvalds
mdacon_clear(struct vc_data * c,unsigned int y,unsigned int x,unsigned int width)440559f01a0SJiri Slaby (SUSE) static void mdacon_clear(struct vc_data *c, unsigned int y, unsigned int x,
441559f01a0SJiri Slaby (SUSE) unsigned int width)
4421da177e4SLinus Torvalds {
443927f7a17SJiri Slaby u16 *dest = mda_addr(x, y);
4441da177e4SLinus Torvalds u16 eattr = mda_convert_attr(c->vc_video_erase_char);
4451da177e4SLinus Torvalds
4461da177e4SLinus Torvalds scr_memsetw(dest, eattr, width * 2);
4471da177e4SLinus Torvalds }
4481da177e4SLinus Torvalds
mdacon_switch(struct vc_data * c)4498d5cc8eeSJiri Slaby (SUSE) static bool mdacon_switch(struct vc_data *c)
4501da177e4SLinus Torvalds {
4518d5cc8eeSJiri Slaby (SUSE) return true; /* redrawing needed */
4521da177e4SLinus Torvalds }
4531da177e4SLinus Torvalds
mdacon_blank(struct vc_data * c,enum vesa_blank_mode blank,bool mode_switch)45477e11093SJiri Slaby (SUSE) static bool mdacon_blank(struct vc_data *c, enum vesa_blank_mode blank,
45577e11093SJiri Slaby (SUSE) bool mode_switch)
4561da177e4SLinus Torvalds {
4571da177e4SLinus Torvalds if (mda_type == TYPE_MDA) {
4581da177e4SLinus Torvalds if (blank)
459734f13b1SJiri Slaby scr_memsetw(mda_vram_base,
4601da177e4SLinus Torvalds mda_convert_attr(c->vc_video_erase_char),
4611da177e4SLinus Torvalds c->vc_screenbuf_size);
4621da177e4SLinus Torvalds /* Tell console.c that it has to restore the screen itself */
46377e11093SJiri Slaby (SUSE) return true;
4641da177e4SLinus Torvalds } else {
4651da177e4SLinus Torvalds if (blank)
4661da177e4SLinus Torvalds outb_p(0x00, mda_mode_port); /* disable video */
4671da177e4SLinus Torvalds else
4681da177e4SLinus Torvalds outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN,
4691da177e4SLinus Torvalds mda_mode_port);
47077e11093SJiri Slaby (SUSE) return false;
4711da177e4SLinus Torvalds }
4721da177e4SLinus Torvalds }
4731da177e4SLinus Torvalds
mdacon_cursor(struct vc_data * c,bool enable)474a292e3fcSJiri Slaby (SUSE) static void mdacon_cursor(struct vc_data *c, bool enable)
4751da177e4SLinus Torvalds {
476a292e3fcSJiri Slaby (SUSE) if (!enable) {
4771da177e4SLinus Torvalds mda_set_cursor(mda_vram_len - 1);
4781da177e4SLinus Torvalds return;
4791da177e4SLinus Torvalds }
4801da177e4SLinus Torvalds
48128bc24fcSJiri Slaby mda_set_cursor(c->state.y * mda_num_columns * 2 + c->state.x * 2);
4821da177e4SLinus Torvalds
483c0e4b3adSJiri Slaby switch (CUR_SIZE(c->vc_cursor_type)) {
4841da177e4SLinus Torvalds
4851da177e4SLinus Torvalds case CUR_LOWER_THIRD: mda_set_cursor_size(10, 13); break;
4861da177e4SLinus Torvalds case CUR_LOWER_HALF: mda_set_cursor_size(7, 13); break;
4871da177e4SLinus Torvalds case CUR_TWO_THIRDS: mda_set_cursor_size(4, 13); break;
4881da177e4SLinus Torvalds case CUR_BLOCK: mda_set_cursor_size(1, 13); break;
4891da177e4SLinus Torvalds case CUR_NONE: mda_set_cursor_size(14, 13); break;
4901da177e4SLinus Torvalds default: mda_set_cursor_size(12, 13); break;
4911da177e4SLinus Torvalds }
4921da177e4SLinus Torvalds }
4931da177e4SLinus Torvalds
mdacon_scroll(struct vc_data * c,unsigned int t,unsigned int b,enum con_scroll dir,unsigned int lines)494d705ff38SJiri Slaby static bool mdacon_scroll(struct vc_data *c, unsigned int t, unsigned int b,
495d705ff38SJiri Slaby enum con_scroll dir, unsigned int lines)
4961da177e4SLinus Torvalds {
49793f78da4SLinus Torvalds u16 eattr = mda_convert_attr(c->vc_video_erase_char);
4981da177e4SLinus Torvalds
4991da177e4SLinus Torvalds if (!lines)
500d705ff38SJiri Slaby return false;
5011da177e4SLinus Torvalds
5021da177e4SLinus Torvalds if (lines > c->vc_rows) /* maximum realistic size */
5031da177e4SLinus Torvalds lines = c->vc_rows;
5041da177e4SLinus Torvalds
5051da177e4SLinus Torvalds switch (dir) {
5061da177e4SLinus Torvalds
5071da177e4SLinus Torvalds case SM_UP:
508927f7a17SJiri Slaby scr_memmovew(mda_addr(0, t), mda_addr(0, t + lines),
5091da177e4SLinus Torvalds (b-t-lines)*mda_num_columns*2);
510927f7a17SJiri Slaby scr_memsetw(mda_addr(0, b - lines), eattr,
5111da177e4SLinus Torvalds lines*mda_num_columns*2);
5121da177e4SLinus Torvalds break;
5131da177e4SLinus Torvalds
5141da177e4SLinus Torvalds case SM_DOWN:
515927f7a17SJiri Slaby scr_memmovew(mda_addr(0, t + lines), mda_addr(0, t),
5161da177e4SLinus Torvalds (b-t-lines)*mda_num_columns*2);
517927f7a17SJiri Slaby scr_memsetw(mda_addr(0, t), eattr, lines*mda_num_columns*2);
5181da177e4SLinus Torvalds break;
5191da177e4SLinus Torvalds }
5201da177e4SLinus Torvalds
521d705ff38SJiri Slaby return false;
5221da177e4SLinus Torvalds }
5231da177e4SLinus Torvalds
5241da177e4SLinus Torvalds
5251da177e4SLinus Torvalds /*
5261da177e4SLinus Torvalds * The console `switch' structure for the MDA based console
5271da177e4SLinus Torvalds */
5281da177e4SLinus Torvalds
5291da177e4SLinus Torvalds static const struct consw mda_con = {
5301da177e4SLinus Torvalds .owner = THIS_MODULE,
5311da177e4SLinus Torvalds .con_startup = mdacon_startup,
5321da177e4SLinus Torvalds .con_init = mdacon_init,
5331da177e4SLinus Torvalds .con_deinit = mdacon_deinit,
5341da177e4SLinus Torvalds .con_clear = mdacon_clear,
5351da177e4SLinus Torvalds .con_putcs = mdacon_putcs,
5361da177e4SLinus Torvalds .con_cursor = mdacon_cursor,
5371da177e4SLinus Torvalds .con_scroll = mdacon_scroll,
5381da177e4SLinus Torvalds .con_switch = mdacon_switch,
5391da177e4SLinus Torvalds .con_blank = mdacon_blank,
5401da177e4SLinus Torvalds .con_build_attr = mdacon_build_attr,
5411da177e4SLinus Torvalds .con_invert_region = mdacon_invert_region,
5421da177e4SLinus Torvalds };
5431da177e4SLinus Torvalds
mda_console_init(void)5441da177e4SLinus Torvalds int __init mda_console_init(void)
5451da177e4SLinus Torvalds {
546155957f5SWang YanQing int err;
547155957f5SWang YanQing
5481da177e4SLinus Torvalds if (mda_first_vc > mda_last_vc)
5491da177e4SLinus Torvalds return 1;
550155957f5SWang YanQing console_lock();
551155957f5SWang YanQing err = do_take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);
552155957f5SWang YanQing console_unlock();
553155957f5SWang YanQing return err;
5541da177e4SLinus Torvalds }
5551da177e4SLinus Torvalds
mda_console_exit(void)5561da177e4SLinus Torvalds static void __exit mda_console_exit(void)
5571da177e4SLinus Torvalds {
5581da177e4SLinus Torvalds give_up_console(&mda_con);
5591da177e4SLinus Torvalds }
5601da177e4SLinus Torvalds
5611da177e4SLinus Torvalds module_init(mda_console_init);
5621da177e4SLinus Torvalds module_exit(mda_console_exit);
5631da177e4SLinus Torvalds
564*3402302cSJeff Johnson MODULE_DESCRIPTION("MDA based console driver");
5651da177e4SLinus Torvalds MODULE_LICENSE("GPL");
5661da177e4SLinus Torvalds
567