1 /* 2 * linux/drivers/video/console/sticon.c - console driver using HP's STI firmware 3 * 4 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> 5 * Copyright (C) 2002 Helge Deller <deller@gmx.de> 6 * 7 * Based on linux/drivers/video/vgacon.c and linux/drivers/video/fbcon.c, 8 * which were 9 * 10 * Created 28 Sep 1997 by Geert Uytterhoeven 11 * Rewritten by Martin Mares <mj@ucw.cz>, July 1998 12 * Copyright (C) 1991, 1992 Linus Torvalds 13 * 1995 Jay Estabrook 14 * Copyright (C) 1995 Geert Uytterhoeven 15 * Copyright (C) 1993 Bjoern Brauel 16 * Roman Hodek 17 * Copyright (C) 1993 Hamish Macdonald 18 * Greg Harp 19 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 20 * 21 * with work by William Rucklidge (wjr@cs.cornell.edu) 22 * Geert Uytterhoeven 23 * Jes Sorensen (jds@kom.auc.dk) 24 * Martin Apel 25 * with work by Guenther Kelleter 26 * Martin Schaller 27 * Andreas Schwab 28 * Emmanuel Marty (core@ggi-project.org) 29 * Jakub Jelinek (jj@ultra.linux.cz) 30 * Martin Mares <mj@ucw.cz> 31 * 32 * This file is subject to the terms and conditions of the GNU General Public 33 * License. See the file COPYING in the main directory of this archive for 34 * more details. 35 * 36 */ 37 38 #include <linux/init.h> 39 #include <linux/kernel.h> 40 #include <linux/console.h> 41 #include <linux/errno.h> 42 #include <linux/vt_kern.h> 43 #include <linux/kd.h> 44 #include <linux/selection.h> 45 #include <linux/module.h> 46 47 #include <asm/io.h> 48 49 #include "../fbdev/sticore.h" 50 51 /* switching to graphics mode */ 52 #define BLANK 0 53 static int vga_is_gfx; 54 55 /* this is the sti_struct used for this console */ 56 static struct sti_struct *sticon_sti; 57 58 /* Software scrollback */ 59 static unsigned long softback_buf, softback_curr; 60 static unsigned long softback_in; 61 static unsigned long /* softback_top, */ softback_end; 62 static int softback_lines; 63 64 /* software cursor */ 65 static int cursor_drawn; 66 #define CURSOR_DRAW_DELAY (1) 67 #define DEFAULT_CURSOR_BLINK_RATE (20) 68 69 static int vbl_cursor_cnt; 70 71 static inline void cursor_undrawn(void) 72 { 73 vbl_cursor_cnt = 0; 74 cursor_drawn = 0; 75 } 76 77 static const char *sticon_startup(void) 78 { 79 return "STI console"; 80 } 81 82 static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos) 83 { 84 int redraw_cursor = 0; 85 86 if (vga_is_gfx || console_blanked) 87 return; 88 89 if (conp->vc_mode != KD_TEXT) 90 return; 91 #if 0 92 if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) { 93 cursor_undrawn(); 94 redraw_cursor = 1; 95 } 96 #endif 97 98 sti_putc(sticon_sti, c, ypos, xpos); 99 100 if (redraw_cursor) 101 vbl_cursor_cnt = CURSOR_DRAW_DELAY; 102 } 103 104 static void sticon_putcs(struct vc_data *conp, const unsigned short *s, 105 int count, int ypos, int xpos) 106 { 107 int redraw_cursor = 0; 108 109 if (vga_is_gfx || console_blanked) 110 return; 111 112 if (conp->vc_mode != KD_TEXT) 113 return; 114 115 #if 0 116 if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) && 117 (p->cursor_x < (xpos + count))) { 118 cursor_undrawn(); 119 redraw_cursor = 1; 120 } 121 #endif 122 123 while (count--) { 124 sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++); 125 } 126 127 if (redraw_cursor) 128 vbl_cursor_cnt = CURSOR_DRAW_DELAY; 129 } 130 131 static void sticon_cursor(struct vc_data *conp, int mode) 132 { 133 unsigned short car1; 134 135 car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols]; 136 switch (mode) { 137 case CM_ERASE: 138 sti_putc(sticon_sti, car1, conp->vc_y, conp->vc_x); 139 break; 140 case CM_MOVE: 141 case CM_DRAW: 142 switch (conp->vc_cursor_type & 0x0f) { 143 case CUR_UNDERLINE: 144 case CUR_LOWER_THIRD: 145 case CUR_LOWER_HALF: 146 case CUR_TWO_THIRDS: 147 case CUR_BLOCK: 148 sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11), 149 conp->vc_y, conp->vc_x); 150 break; 151 } 152 break; 153 } 154 } 155 156 static int sticon_scroll(struct vc_data *conp, int t, int b, int dir, int count) 157 { 158 struct sti_struct *sti = sticon_sti; 159 160 if (vga_is_gfx) 161 return 0; 162 163 sticon_cursor(conp, CM_ERASE); 164 165 switch (dir) { 166 case SM_UP: 167 sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols); 168 sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char); 169 break; 170 171 case SM_DOWN: 172 sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols); 173 sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char); 174 break; 175 } 176 177 return 0; 178 } 179 180 static void sticon_init(struct vc_data *c, int init) 181 { 182 struct sti_struct *sti = sticon_sti; 183 int vc_cols, vc_rows; 184 185 sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0); 186 vc_cols = sti_onscreen_x(sti) / sti->font_width; 187 vc_rows = sti_onscreen_y(sti) / sti->font_height; 188 c->vc_can_do_color = 1; 189 190 if (init) { 191 c->vc_cols = vc_cols; 192 c->vc_rows = vc_rows; 193 } else { 194 /* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */ 195 /* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */ 196 vc_resize(c, vc_cols, vc_rows); 197 /* vc_resize_con(vc_rows, vc_cols, c->vc_num); */ 198 } 199 } 200 201 static void sticon_deinit(struct vc_data *c) 202 { 203 } 204 205 static void sticon_clear(struct vc_data *conp, int sy, int sx, int height, 206 int width) 207 { 208 if (!height || !width) 209 return; 210 211 sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char); 212 } 213 214 static int sticon_switch(struct vc_data *conp) 215 { 216 return 1; /* needs refreshing */ 217 } 218 219 static int sticon_set_origin(struct vc_data *conp) 220 { 221 return 0; 222 } 223 224 static int sticon_blank(struct vc_data *c, int blank, int mode_switch) 225 { 226 if (blank == 0) { 227 if (mode_switch) 228 vga_is_gfx = 0; 229 return 1; 230 } 231 sticon_set_origin(c); 232 sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK); 233 if (mode_switch) 234 vga_is_gfx = 1; 235 return 1; 236 } 237 238 static u16 *sticon_screen_pos(struct vc_data *conp, int offset) 239 { 240 int line; 241 unsigned long p; 242 243 if (conp->vc_num != fg_console || !softback_lines) 244 return (u16 *)(conp->vc_origin + offset); 245 line = offset / conp->vc_size_row; 246 if (line >= softback_lines) 247 return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row); 248 p = softback_curr + offset; 249 if (p >= softback_end) 250 p += softback_buf - softback_end; 251 return (u16 *)p; 252 } 253 254 static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos, 255 int *px, int *py) 256 { 257 int x, y; 258 unsigned long ret; 259 if (pos >= conp->vc_origin && pos < conp->vc_scr_end) { 260 unsigned long offset = (pos - conp->vc_origin) / 2; 261 262 x = offset % conp->vc_cols; 263 y = offset / conp->vc_cols; 264 if (conp->vc_num == fg_console) 265 y += softback_lines; 266 ret = pos + (conp->vc_cols - x) * 2; 267 } else if (conp->vc_num == fg_console && softback_lines) { 268 unsigned long offset = pos - softback_curr; 269 270 if (pos < softback_curr) 271 offset += softback_end - softback_buf; 272 offset /= 2; 273 x = offset % conp->vc_cols; 274 y = offset / conp->vc_cols; 275 ret = pos + (conp->vc_cols - x) * 2; 276 if (ret == softback_end) 277 ret = softback_buf; 278 if (ret == softback_in) 279 ret = conp->vc_origin; 280 } else { 281 /* Should not happen */ 282 x = y = 0; 283 ret = conp->vc_origin; 284 } 285 if (px) *px = x; 286 if (py) *py = y; 287 return ret; 288 } 289 290 static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens, 291 u8 blink, u8 underline, u8 reverse, u8 italic) 292 { 293 u8 attr = ((color & 0x70) >> 1) | ((color & 7)); 294 295 if (reverse) { 296 color = ((color >> 3) & 0x7) | ((color & 0x7) << 3); 297 } 298 299 return attr; 300 } 301 302 static void sticon_invert_region(struct vc_data *conp, u16 *p, int count) 303 { 304 int col = 1; /* vga_can_do_color; */ 305 306 while (count--) { 307 u16 a = scr_readw(p); 308 309 if (col) 310 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 311 else 312 a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; 313 314 scr_writew(a, p++); 315 } 316 } 317 318 static void sticon_save_screen(struct vc_data *conp) 319 { 320 } 321 322 static const struct consw sti_con = { 323 .owner = THIS_MODULE, 324 .con_startup = sticon_startup, 325 .con_init = sticon_init, 326 .con_deinit = sticon_deinit, 327 .con_clear = sticon_clear, 328 .con_putc = sticon_putc, 329 .con_putcs = sticon_putcs, 330 .con_cursor = sticon_cursor, 331 .con_scroll = sticon_scroll, 332 .con_switch = sticon_switch, 333 .con_blank = sticon_blank, 334 .con_set_origin = sticon_set_origin, 335 .con_save_screen = sticon_save_screen, 336 .con_build_attr = sticon_build_attr, 337 .con_invert_region = sticon_invert_region, 338 .con_screen_pos = sticon_screen_pos, 339 .con_getxy = sticon_getxy, 340 }; 341 342 343 344 static int __init sticonsole_init(void) 345 { 346 int err; 347 /* already initialized ? */ 348 if (sticon_sti) 349 return 0; 350 351 sticon_sti = sti_get_rom(0); 352 if (!sticon_sti) 353 return -ENODEV; 354 355 if (conswitchp == &dummy_con) { 356 printk(KERN_INFO "sticon: Initializing STI text console.\n"); 357 console_lock(); 358 err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1); 359 console_unlock(); 360 return err; 361 } 362 return 0; 363 } 364 365 module_init(sticonsole_init); 366 MODULE_LICENSE("GPL"); 367