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/slab.h> 371da177e4SLinus Torvalds #include <linux/vt_kern.h> 381da177e4SLinus Torvalds #include <linux/vt_buffer.h> 391da177e4SLinus Torvalds #include <linux/selection.h> 401da177e4SLinus Torvalds #include <linux/spinlock.h> 411da177e4SLinus Torvalds #include <linux/ioport.h> 421da177e4SLinus Torvalds #include <linux/delay.h> 431da177e4SLinus Torvalds #include <linux/init.h> 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #include <asm/io.h> 461da177e4SLinus Torvalds #include <asm/vga.h> 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static DEFINE_SPINLOCK(mda_lock); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* description of the hardware layout */ 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds static unsigned long mda_vram_base; /* Base of video memory */ 531da177e4SLinus Torvalds static unsigned long mda_vram_len; /* Size of video memory */ 541da177e4SLinus Torvalds static unsigned int mda_num_columns; /* Number of text columns */ 551da177e4SLinus Torvalds static unsigned int mda_num_lines; /* Number of text lines */ 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds static unsigned int mda_index_port; /* Register select port */ 581da177e4SLinus Torvalds static unsigned int mda_value_port; /* Register value port */ 591da177e4SLinus Torvalds static unsigned int mda_mode_port; /* Mode control port */ 601da177e4SLinus Torvalds static unsigned int mda_status_port; /* Status and Config port */ 611da177e4SLinus Torvalds static unsigned int mda_gfx_port; /* Graphics control port */ 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds /* current hardware state */ 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds static int mda_cursor_loc=-1; 661da177e4SLinus Torvalds static int mda_cursor_size_from=-1; 671da177e4SLinus Torvalds static int mda_cursor_size_to=-1; 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds static enum { TYPE_MDA, TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } mda_type; 701da177e4SLinus Torvalds static char *mda_type_name; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* console information */ 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds static int mda_first_vc = 1; 751da177e4SLinus Torvalds static int mda_last_vc = 16; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds static struct vc_data *mda_display_fg = NULL; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds module_param(mda_first_vc, int, 0); 801da177e4SLinus Torvalds module_param(mda_last_vc, int, 0); 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds /* MDA register values 831da177e4SLinus Torvalds */ 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds #define MDA_CURSOR_BLINKING 0x00 861da177e4SLinus Torvalds #define MDA_CURSOR_OFF 0x20 871da177e4SLinus Torvalds #define MDA_CURSOR_SLOWBLINK 0x60 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds #define MDA_MODE_GRAPHICS 0x02 901da177e4SLinus Torvalds #define MDA_MODE_VIDEO_EN 0x08 911da177e4SLinus Torvalds #define MDA_MODE_BLINK_EN 0x20 921da177e4SLinus Torvalds #define MDA_MODE_GFX_PAGE1 0x80 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds #define MDA_STATUS_HSYNC 0x01 951da177e4SLinus Torvalds #define MDA_STATUS_VSYNC 0x80 961da177e4SLinus Torvalds #define MDA_STATUS_VIDEO 0x08 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds #define MDA_CONFIG_COL132 0x08 991da177e4SLinus Torvalds #define MDA_GFX_MODE_EN 0x01 1001da177e4SLinus Torvalds #define MDA_GFX_PAGE_EN 0x02 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* 1041da177e4SLinus Torvalds * MDA could easily be classified as "pre-dinosaur hardware". 1051da177e4SLinus Torvalds */ 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static void write_mda_b(unsigned int val, unsigned char reg) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds unsigned long flags; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds spin_lock_irqsave(&mda_lock, flags); 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds outb_p(reg, mda_index_port); 1141da177e4SLinus Torvalds outb_p(val, mda_value_port); 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds spin_unlock_irqrestore(&mda_lock, flags); 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds static void write_mda_w(unsigned int val, unsigned char reg) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds unsigned long flags; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds spin_lock_irqsave(&mda_lock, flags); 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds outb_p(reg, mda_index_port); outb_p(val >> 8, mda_value_port); 1261da177e4SLinus Torvalds outb_p(reg+1, mda_index_port); outb_p(val & 0xff, mda_value_port); 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds spin_unlock_irqrestore(&mda_lock, flags); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds #ifdef TEST_MDA_B 1321da177e4SLinus Torvalds static int test_mda_b(unsigned char val, unsigned char reg) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds unsigned long flags; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds spin_lock_irqsave(&mda_lock, flags); 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds outb_p(reg, mda_index_port); 1391da177e4SLinus Torvalds outb (val, mda_value_port); 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds udelay(20); val = (inb_p(mda_value_port) == val); 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds spin_unlock_irqrestore(&mda_lock, flags); 1441da177e4SLinus Torvalds return val; 1451da177e4SLinus Torvalds } 1461da177e4SLinus Torvalds #endif 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds static inline void mda_set_cursor(unsigned int location) 1491da177e4SLinus Torvalds { 1501da177e4SLinus Torvalds if (mda_cursor_loc == location) 1511da177e4SLinus Torvalds return; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds write_mda_w(location >> 1, 0x0e); 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds mda_cursor_loc = location; 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds static inline void mda_set_cursor_size(int from, int to) 1591da177e4SLinus Torvalds { 1601da177e4SLinus Torvalds if (mda_cursor_size_from==from && mda_cursor_size_to==to) 1611da177e4SLinus Torvalds return; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds if (from > to) { 1641da177e4SLinus Torvalds write_mda_b(MDA_CURSOR_OFF, 0x0a); /* disable cursor */ 1651da177e4SLinus Torvalds } else { 1661da177e4SLinus Torvalds write_mda_b(from, 0x0a); /* cursor start */ 1671da177e4SLinus Torvalds write_mda_b(to, 0x0b); /* cursor end */ 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds mda_cursor_size_from = from; 1711da177e4SLinus Torvalds mda_cursor_size_to = to; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds #ifndef MODULE 1761da177e4SLinus Torvalds static int __init mdacon_setup(char *str) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds /* command line format: mdacon=<first>,<last> */ 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds int ints[3]; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds str = get_options(str, ARRAY_SIZE(ints), ints); 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds if (ints[0] < 2) 1851da177e4SLinus Torvalds return 0; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds if (ints[1] < 1 || ints[1] > MAX_NR_CONSOLES || 1881da177e4SLinus Torvalds ints[2] < 1 || ints[2] > MAX_NR_CONSOLES) 1891da177e4SLinus Torvalds return 0; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds mda_first_vc = ints[1]; 1921da177e4SLinus Torvalds mda_last_vc = ints[2]; 1931da177e4SLinus Torvalds return 1; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds __setup("mdacon=", mdacon_setup); 1971da177e4SLinus Torvalds #endif 1981da177e4SLinus Torvalds 1997ca7b5c4SFrederik Deweerdt static int mda_detect(void) 2001da177e4SLinus Torvalds { 2011da177e4SLinus Torvalds int count=0; 2021da177e4SLinus Torvalds u16 *p, p_save; 2031da177e4SLinus Torvalds u16 *q, q_save; 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds /* do a memory check */ 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds p = (u16 *) mda_vram_base; 2081da177e4SLinus Torvalds q = (u16 *) (mda_vram_base + 0x01000); 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds p_save = scr_readw(p); q_save = scr_readw(q); 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds scr_writew(0xAA55, p); if (scr_readw(p) == 0xAA55) count++; 2131da177e4SLinus Torvalds scr_writew(0x55AA, p); if (scr_readw(p) == 0x55AA) count++; 2141da177e4SLinus Torvalds scr_writew(p_save, p); 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds if (count != 2) { 2171da177e4SLinus Torvalds return 0; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds /* check if we have 4K or 8K */ 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds scr_writew(0xA55A, q); scr_writew(0x0000, p); 2231da177e4SLinus Torvalds if (scr_readw(q) == 0xA55A) count++; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds scr_writew(0x5AA5, q); scr_writew(0x0000, p); 2261da177e4SLinus Torvalds if (scr_readw(q) == 0x5AA5) count++; 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds scr_writew(p_save, p); scr_writew(q_save, q); 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds if (count == 4) { 2311da177e4SLinus Torvalds mda_vram_len = 0x02000; 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds /* Ok, there is definitely a card registering at the correct 2351da177e4SLinus Torvalds * memory location, so now we do an I/O port test. 2361da177e4SLinus Torvalds */ 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds #ifdef TEST_MDA_B 2391da177e4SLinus Torvalds /* Edward: These two mess `tests' mess up my cursor on bootup */ 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds /* cursor low register */ 2421da177e4SLinus Torvalds if (! test_mda_b(0x66, 0x0f)) { 2431da177e4SLinus Torvalds return 0; 2441da177e4SLinus Torvalds } 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds /* cursor low register */ 2471da177e4SLinus Torvalds if (! test_mda_b(0x99, 0x0f)) { 2481da177e4SLinus Torvalds return 0; 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds #endif 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds /* See if the card is a Hercules, by checking whether the vsync 2531da177e4SLinus Torvalds * bit of the status register is changing. This test lasts for 2541da177e4SLinus Torvalds * approximately 1/10th of a second. 2551da177e4SLinus Torvalds */ 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds p_save = q_save = inb_p(mda_status_port) & MDA_STATUS_VSYNC; 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds for (count=0; count < 50000 && p_save == q_save; count++) { 2601da177e4SLinus Torvalds q_save = inb(mda_status_port) & MDA_STATUS_VSYNC; 2611da177e4SLinus Torvalds udelay(2); 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds if (p_save != q_save) { 2651da177e4SLinus Torvalds switch (inb_p(mda_status_port) & 0x70) { 2661da177e4SLinus Torvalds case 0x10: 2671da177e4SLinus Torvalds mda_type = TYPE_HERCPLUS; 2681da177e4SLinus Torvalds mda_type_name = "HerculesPlus"; 2691da177e4SLinus Torvalds break; 2701da177e4SLinus Torvalds case 0x50: 2711da177e4SLinus Torvalds mda_type = TYPE_HERCCOLOR; 2721da177e4SLinus Torvalds mda_type_name = "HerculesColor"; 2731da177e4SLinus Torvalds break; 2741da177e4SLinus Torvalds default: 2751da177e4SLinus Torvalds mda_type = TYPE_HERC; 2761da177e4SLinus Torvalds mda_type_name = "Hercules"; 2771da177e4SLinus Torvalds break; 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds return 1; 2821da177e4SLinus Torvalds } 2831da177e4SLinus Torvalds 2847ca7b5c4SFrederik Deweerdt static void mda_initialize(void) 2851da177e4SLinus Torvalds { 2861da177e4SLinus Torvalds write_mda_b(97, 0x00); /* horizontal total */ 2871da177e4SLinus Torvalds write_mda_b(80, 0x01); /* horizontal displayed */ 2881da177e4SLinus Torvalds write_mda_b(82, 0x02); /* horizontal sync pos */ 2891da177e4SLinus Torvalds write_mda_b(15, 0x03); /* horizontal sync width */ 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds write_mda_b(25, 0x04); /* vertical total */ 2921da177e4SLinus Torvalds write_mda_b(6, 0x05); /* vertical total adjust */ 2931da177e4SLinus Torvalds write_mda_b(25, 0x06); /* vertical displayed */ 2941da177e4SLinus Torvalds write_mda_b(25, 0x07); /* vertical sync pos */ 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds write_mda_b(2, 0x08); /* interlace mode */ 2971da177e4SLinus Torvalds write_mda_b(13, 0x09); /* maximum scanline */ 2981da177e4SLinus Torvalds write_mda_b(12, 0x0a); /* cursor start */ 2991da177e4SLinus Torvalds write_mda_b(13, 0x0b); /* cursor end */ 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds write_mda_w(0x0000, 0x0c); /* start address */ 3021da177e4SLinus Torvalds write_mda_w(0x0000, 0x0e); /* cursor location */ 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, mda_mode_port); 3051da177e4SLinus Torvalds outb_p(0x00, mda_status_port); 3061da177e4SLinus Torvalds outb_p(0x00, mda_gfx_port); 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 309ac08dae8SAntonino A. Daplas static const char *mdacon_startup(void) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds mda_num_columns = 80; 3121da177e4SLinus Torvalds mda_num_lines = 25; 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds mda_vram_len = 0x01000; 3154f1bcaf0SBjorn Helgaas mda_vram_base = VGA_MAP_MEM(0xb0000, mda_vram_len); 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds mda_index_port = 0x3b4; 3181da177e4SLinus Torvalds mda_value_port = 0x3b5; 3191da177e4SLinus Torvalds mda_mode_port = 0x3b8; 3201da177e4SLinus Torvalds mda_status_port = 0x3ba; 3211da177e4SLinus Torvalds mda_gfx_port = 0x3bf; 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds mda_type = TYPE_MDA; 3241da177e4SLinus Torvalds mda_type_name = "MDA"; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds if (! mda_detect()) { 3271da177e4SLinus Torvalds printk("mdacon: MDA card not detected.\n"); 3281da177e4SLinus Torvalds return NULL; 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds if (mda_type != TYPE_MDA) { 3321da177e4SLinus Torvalds mda_initialize(); 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds /* cursor looks ugly during boot-up, so turn it off */ 3361da177e4SLinus Torvalds mda_set_cursor(mda_vram_len - 1); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds printk("mdacon: %s with %ldK of memory detected.\n", 3391da177e4SLinus Torvalds mda_type_name, mda_vram_len/1024); 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds return "MDA-2"; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds static void mdacon_init(struct vc_data *c, int init) 3451da177e4SLinus Torvalds { 3461da177e4SLinus Torvalds c->vc_complement_mask = 0x0800; /* reverse video */ 3471da177e4SLinus Torvalds c->vc_display_fg = &mda_display_fg; 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds if (init) { 3501da177e4SLinus Torvalds c->vc_cols = mda_num_columns; 3511da177e4SLinus Torvalds c->vc_rows = mda_num_lines; 3521da177e4SLinus Torvalds } else 3531da177e4SLinus Torvalds vc_resize(c, mda_num_columns, mda_num_lines); 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds /* make the first MDA console visible */ 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds if (mda_display_fg == NULL) 3581da177e4SLinus Torvalds mda_display_fg = c; 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 3611da177e4SLinus Torvalds static void mdacon_deinit(struct vc_data *c) 3621da177e4SLinus Torvalds { 3631da177e4SLinus Torvalds /* con_set_default_unimap(c->vc_num); */ 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds if (mda_display_fg == c) 3661da177e4SLinus Torvalds mda_display_fg = NULL; 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds static inline u16 mda_convert_attr(u16 ch) 3701da177e4SLinus Torvalds { 3711da177e4SLinus Torvalds u16 attr = 0x0700; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds /* Underline and reverse-video are mutually exclusive on MDA. 3741da177e4SLinus Torvalds * Since reverse-video is used for cursors and selected areas, 3751da177e4SLinus Torvalds * it takes precedence. 3761da177e4SLinus Torvalds */ 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds if (ch & 0x0800) attr = 0x7000; /* reverse */ 3791da177e4SLinus Torvalds else if (ch & 0x0400) attr = 0x0100; /* underline */ 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds return ((ch & 0x0200) << 2) | /* intensity */ 3821da177e4SLinus Torvalds (ch & 0x8000) | /* blink */ 3831da177e4SLinus Torvalds (ch & 0x00ff) | attr; 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds static u8 mdacon_build_attr(struct vc_data *c, u8 color, u8 intensity, 387*fa6ce9abSJan Engelhardt u8 blink, u8 underline, u8 reverse, u8 italic) 3881da177e4SLinus Torvalds { 3891da177e4SLinus Torvalds /* The attribute is just a bit vector: 3901da177e4SLinus Torvalds * 3911da177e4SLinus Torvalds * Bit 0..1 : intensity (0..2) 3921da177e4SLinus Torvalds * Bit 2 : underline 3931da177e4SLinus Torvalds * Bit 3 : reverse 3941da177e4SLinus Torvalds * Bit 7 : blink 3951da177e4SLinus Torvalds */ 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds return (intensity & 3) | 3981da177e4SLinus Torvalds ((underline & 1) << 2) | 3991da177e4SLinus Torvalds ((reverse & 1) << 3) | 400*fa6ce9abSJan Engelhardt (!!italic << 4) | 4011da177e4SLinus Torvalds ((blink & 1) << 7); 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds static void mdacon_invert_region(struct vc_data *c, u16 *p, int count) 4051da177e4SLinus Torvalds { 4061da177e4SLinus Torvalds for (; count > 0; count--) { 4071da177e4SLinus Torvalds scr_writew(scr_readw(p) ^ 0x0800, p); 4081da177e4SLinus Torvalds p++; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds #define MDA_ADDR(x,y) ((u16 *) mda_vram_base + (y)*mda_num_columns + (x)) 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds static void mdacon_putc(struct vc_data *c, int ch, int y, int x) 4151da177e4SLinus Torvalds { 4161da177e4SLinus Torvalds scr_writew(mda_convert_attr(ch), MDA_ADDR(x, y)); 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds static void mdacon_putcs(struct vc_data *c, const unsigned short *s, 4201da177e4SLinus Torvalds int count, int y, int x) 4211da177e4SLinus Torvalds { 4221da177e4SLinus Torvalds u16 *dest = MDA_ADDR(x, y); 4231da177e4SLinus Torvalds 4241da177e4SLinus Torvalds for (; count > 0; count--) { 4251da177e4SLinus Torvalds scr_writew(mda_convert_attr(scr_readw(s++)), dest++); 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds } 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds static void mdacon_clear(struct vc_data *c, int y, int x, 4301da177e4SLinus Torvalds int height, int width) 4311da177e4SLinus Torvalds { 4321da177e4SLinus Torvalds u16 *dest = MDA_ADDR(x, y); 4331da177e4SLinus Torvalds u16 eattr = mda_convert_attr(c->vc_video_erase_char); 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds if (width <= 0 || height <= 0) 4361da177e4SLinus Torvalds return; 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds if (x==0 && width==mda_num_columns) { 4391da177e4SLinus Torvalds scr_memsetw(dest, eattr, height*width*2); 4401da177e4SLinus Torvalds } else { 4411da177e4SLinus Torvalds for (; height > 0; height--, dest+=mda_num_columns) 4421da177e4SLinus Torvalds scr_memsetw(dest, eattr, width*2); 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds static void mdacon_bmove(struct vc_data *c, int sy, int sx, 4471da177e4SLinus Torvalds int dy, int dx, int height, int width) 4481da177e4SLinus Torvalds { 4491da177e4SLinus Torvalds u16 *src, *dest; 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds if (width <= 0 || height <= 0) 4521da177e4SLinus Torvalds return; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds if (sx==0 && dx==0 && width==mda_num_columns) { 4551da177e4SLinus Torvalds scr_memmovew(MDA_ADDR(0,dy), MDA_ADDR(0,sy), height*width*2); 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds } else if (dy < sy || (dy == sy && dx < sx)) { 4581da177e4SLinus Torvalds src = MDA_ADDR(sx, sy); 4591da177e4SLinus Torvalds dest = MDA_ADDR(dx, dy); 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds for (; height > 0; height--) { 4621da177e4SLinus Torvalds scr_memmovew(dest, src, width*2); 4631da177e4SLinus Torvalds src += mda_num_columns; 4641da177e4SLinus Torvalds dest += mda_num_columns; 4651da177e4SLinus Torvalds } 4661da177e4SLinus Torvalds } else { 4671da177e4SLinus Torvalds src = MDA_ADDR(sx, sy+height-1); 4681da177e4SLinus Torvalds dest = MDA_ADDR(dx, dy+height-1); 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds for (; height > 0; height--) { 4711da177e4SLinus Torvalds scr_memmovew(dest, src, width*2); 4721da177e4SLinus Torvalds src -= mda_num_columns; 4731da177e4SLinus Torvalds dest -= mda_num_columns; 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds static int mdacon_switch(struct vc_data *c) 4791da177e4SLinus Torvalds { 4801da177e4SLinus Torvalds return 1; /* redrawing needed */ 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds static int mdacon_set_palette(struct vc_data *c, unsigned char *table) 4841da177e4SLinus Torvalds { 4851da177e4SLinus Torvalds return -EINVAL; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds static int mdacon_blank(struct vc_data *c, int blank, int mode_switch) 4891da177e4SLinus Torvalds { 4901da177e4SLinus Torvalds if (mda_type == TYPE_MDA) { 4911da177e4SLinus Torvalds if (blank) 4921da177e4SLinus Torvalds scr_memsetw((void *)mda_vram_base, 4931da177e4SLinus Torvalds mda_convert_attr(c->vc_video_erase_char), 4941da177e4SLinus Torvalds c->vc_screenbuf_size); 4951da177e4SLinus Torvalds /* Tell console.c that it has to restore the screen itself */ 4961da177e4SLinus Torvalds return 1; 4971da177e4SLinus Torvalds } else { 4981da177e4SLinus Torvalds if (blank) 4991da177e4SLinus Torvalds outb_p(0x00, mda_mode_port); /* disable video */ 5001da177e4SLinus Torvalds else 5011da177e4SLinus Torvalds outb_p(MDA_MODE_VIDEO_EN | MDA_MODE_BLINK_EN, 5021da177e4SLinus Torvalds mda_mode_port); 5031da177e4SLinus Torvalds return 0; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds static int mdacon_scrolldelta(struct vc_data *c, int lines) 5081da177e4SLinus Torvalds { 5091da177e4SLinus Torvalds return 0; 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds static void mdacon_cursor(struct vc_data *c, int mode) 5131da177e4SLinus Torvalds { 5141da177e4SLinus Torvalds if (mode == CM_ERASE) { 5151da177e4SLinus Torvalds mda_set_cursor(mda_vram_len - 1); 5161da177e4SLinus Torvalds return; 5171da177e4SLinus Torvalds } 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds mda_set_cursor(c->vc_y*mda_num_columns*2 + c->vc_x*2); 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds switch (c->vc_cursor_type & 0x0f) { 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds case CUR_LOWER_THIRD: mda_set_cursor_size(10, 13); break; 5241da177e4SLinus Torvalds case CUR_LOWER_HALF: mda_set_cursor_size(7, 13); break; 5251da177e4SLinus Torvalds case CUR_TWO_THIRDS: mda_set_cursor_size(4, 13); break; 5261da177e4SLinus Torvalds case CUR_BLOCK: mda_set_cursor_size(1, 13); break; 5271da177e4SLinus Torvalds case CUR_NONE: mda_set_cursor_size(14, 13); break; 5281da177e4SLinus Torvalds default: mda_set_cursor_size(12, 13); break; 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds } 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds static int mdacon_scroll(struct vc_data *c, int t, int b, int dir, int lines) 5331da177e4SLinus Torvalds { 5341da177e4SLinus Torvalds u16 eattr = mda_convert_attr(c->vc_video_erase_char); 5351da177e4SLinus Torvalds 5361da177e4SLinus Torvalds if (!lines) 5371da177e4SLinus Torvalds return 0; 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds if (lines > c->vc_rows) /* maximum realistic size */ 5401da177e4SLinus Torvalds lines = c->vc_rows; 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds switch (dir) { 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds case SM_UP: 5451da177e4SLinus Torvalds scr_memmovew(MDA_ADDR(0,t), MDA_ADDR(0,t+lines), 5461da177e4SLinus Torvalds (b-t-lines)*mda_num_columns*2); 5471da177e4SLinus Torvalds scr_memsetw(MDA_ADDR(0,b-lines), eattr, 5481da177e4SLinus Torvalds lines*mda_num_columns*2); 5491da177e4SLinus Torvalds break; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds case SM_DOWN: 5521da177e4SLinus Torvalds scr_memmovew(MDA_ADDR(0,t+lines), MDA_ADDR(0,t), 5531da177e4SLinus Torvalds (b-t-lines)*mda_num_columns*2); 5541da177e4SLinus Torvalds scr_memsetw(MDA_ADDR(0,t), eattr, lines*mda_num_columns*2); 5551da177e4SLinus Torvalds break; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds return 0; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds /* 5631da177e4SLinus Torvalds * The console `switch' structure for the MDA based console 5641da177e4SLinus Torvalds */ 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds static const struct consw mda_con = { 5671da177e4SLinus Torvalds .owner = THIS_MODULE, 5681da177e4SLinus Torvalds .con_startup = mdacon_startup, 5691da177e4SLinus Torvalds .con_init = mdacon_init, 5701da177e4SLinus Torvalds .con_deinit = mdacon_deinit, 5711da177e4SLinus Torvalds .con_clear = mdacon_clear, 5721da177e4SLinus Torvalds .con_putc = mdacon_putc, 5731da177e4SLinus Torvalds .con_putcs = mdacon_putcs, 5741da177e4SLinus Torvalds .con_cursor = mdacon_cursor, 5751da177e4SLinus Torvalds .con_scroll = mdacon_scroll, 5761da177e4SLinus Torvalds .con_bmove = mdacon_bmove, 5771da177e4SLinus Torvalds .con_switch = mdacon_switch, 5781da177e4SLinus Torvalds .con_blank = mdacon_blank, 5791da177e4SLinus Torvalds .con_set_palette = mdacon_set_palette, 5801da177e4SLinus Torvalds .con_scrolldelta = mdacon_scrolldelta, 5811da177e4SLinus Torvalds .con_build_attr = mdacon_build_attr, 5821da177e4SLinus Torvalds .con_invert_region = mdacon_invert_region, 5831da177e4SLinus Torvalds }; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds int __init mda_console_init(void) 5861da177e4SLinus Torvalds { 5871da177e4SLinus Torvalds if (mda_first_vc > mda_last_vc) 5881da177e4SLinus Torvalds return 1; 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds return take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0); 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds static void __exit mda_console_exit(void) 5941da177e4SLinus Torvalds { 5951da177e4SLinus Torvalds give_up_console(&mda_con); 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds module_init(mda_console_init); 5991da177e4SLinus Torvalds module_exit(mda_console_exit); 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 6021da177e4SLinus Torvalds 603