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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 4498d5cc8eeSJiri Slaby (SUSE) static bool mdacon_switch(struct vc_data *c) 4501da177e4SLinus Torvalds { 4518d5cc8eeSJiri Slaby (SUSE) return true; /* redrawing needed */ 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 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 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 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 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 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