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/tty.h> 41 #include <linux/console.h> 42 #include <linux/errno.h> 43 #include <linux/vt_kern.h> 44 #include <linux/kd.h> 45 #include <linux/selection.h> 46 #include <linux/module.h> 47 48 #include <asm/io.h> 49 50 #include "../sticore.h" 51 52 /* switching to graphics mode */ 53 #define BLANK 0 54 static int vga_is_gfx; 55 56 /* this is the sti_struct used for this console */ 57 static struct sti_struct *sticon_sti; 58 59 /* Software scrollback */ 60 static unsigned long softback_buf, softback_curr; 61 static unsigned long softback_in; 62 static unsigned long /* softback_top, */ softback_end; 63 static int softback_lines; 64 65 /* software cursor */ 66 static int cursor_drawn; 67 #define CURSOR_DRAW_DELAY (1) 68 #define DEFAULT_CURSOR_BLINK_RATE (20) 69 70 static int vbl_cursor_cnt; 71 72 static inline void cursor_undrawn(void) 73 { 74 vbl_cursor_cnt = 0; 75 cursor_drawn = 0; 76 } 77 78 static const char *__init sticon_startup(void) 79 { 80 return "STI console"; 81 } 82 83 static int sticon_set_palette(struct vc_data *c, unsigned char *table) 84 { 85 return -EINVAL; 86 } 87 88 static void sticon_putc(struct vc_data *conp, int c, int ypos, int xpos) 89 { 90 int redraw_cursor = 0; 91 92 if (vga_is_gfx || console_blanked) 93 return; 94 95 if (conp->vc_mode != KD_TEXT) 96 return; 97 #if 0 98 if ((p->cursor_x == xpos) && (p->cursor_y == ypos)) { 99 cursor_undrawn(); 100 redraw_cursor = 1; 101 } 102 #endif 103 104 sti_putc(sticon_sti, c, ypos, xpos); 105 106 if (redraw_cursor) 107 vbl_cursor_cnt = CURSOR_DRAW_DELAY; 108 } 109 110 static void sticon_putcs(struct vc_data *conp, const unsigned short *s, 111 int count, int ypos, int xpos) 112 { 113 int redraw_cursor = 0; 114 115 if (vga_is_gfx || console_blanked) 116 return; 117 118 if (conp->vc_mode != KD_TEXT) 119 return; 120 121 #if 0 122 if ((p->cursor_y == ypos) && (xpos <= p->cursor_x) && 123 (p->cursor_x < (xpos + count))) { 124 cursor_undrawn(); 125 redraw_cursor = 1; 126 } 127 #endif 128 129 while (count--) { 130 sti_putc(sticon_sti, scr_readw(s++), ypos, xpos++); 131 } 132 133 if (redraw_cursor) 134 vbl_cursor_cnt = CURSOR_DRAW_DELAY; 135 } 136 137 static void sticon_cursor(struct vc_data *conp, int mode) 138 { 139 unsigned short car1; 140 141 car1 = conp->vc_screenbuf[conp->vc_x + conp->vc_y * conp->vc_cols]; 142 switch (mode) { 143 case CM_ERASE: 144 sti_putc(sticon_sti, car1, conp->vc_y, conp->vc_x); 145 break; 146 case CM_MOVE: 147 case CM_DRAW: 148 switch (conp->vc_cursor_type & 0x0f) { 149 case CUR_UNDERLINE: 150 case CUR_LOWER_THIRD: 151 case CUR_LOWER_HALF: 152 case CUR_TWO_THIRDS: 153 case CUR_BLOCK: 154 sti_putc(sticon_sti, (car1 & 255) + (0 << 8) + (7 << 11), 155 conp->vc_y, conp->vc_x); 156 break; 157 } 158 break; 159 } 160 } 161 162 static int sticon_scroll(struct vc_data *conp, int t, int b, int dir, int count) 163 { 164 struct sti_struct *sti = sticon_sti; 165 166 if (vga_is_gfx) 167 return 0; 168 169 sticon_cursor(conp, CM_ERASE); 170 171 switch (dir) { 172 case SM_UP: 173 sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols); 174 sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char); 175 break; 176 177 case SM_DOWN: 178 sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols); 179 sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char); 180 break; 181 } 182 183 return 0; 184 } 185 186 static void sticon_bmove(struct vc_data *conp, int sy, int sx, 187 int dy, int dx, int height, int width) 188 { 189 if (!width || !height) 190 return; 191 #if 0 192 if (((sy <= p->cursor_y) && (p->cursor_y < sy+height) && 193 (sx <= p->cursor_x) && (p->cursor_x < sx+width)) || 194 ((dy <= p->cursor_y) && (p->cursor_y < dy+height) && 195 (dx <= p->cursor_x) && (p->cursor_x < dx+width))) 196 sticon_cursor(p, CM_ERASE /*|CM_SOFTBACK*/); 197 #endif 198 199 sti_bmove(sticon_sti, sy, sx, dy, dx, height, width); 200 } 201 202 static void sticon_init(struct vc_data *c, int init) 203 { 204 struct sti_struct *sti = sticon_sti; 205 int vc_cols, vc_rows; 206 207 sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0); 208 vc_cols = sti_onscreen_x(sti) / sti->font_width; 209 vc_rows = sti_onscreen_y(sti) / sti->font_height; 210 c->vc_can_do_color = 1; 211 212 if (init) { 213 c->vc_cols = vc_cols; 214 c->vc_rows = vc_rows; 215 } else { 216 /* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */ 217 /* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */ 218 vc_resize(c, vc_cols, vc_rows); 219 /* vc_resize_con(vc_rows, vc_cols, c->vc_num); */ 220 } 221 } 222 223 static void sticon_deinit(struct vc_data *c) 224 { 225 } 226 227 static void sticon_clear(struct vc_data *conp, int sy, int sx, int height, 228 int width) 229 { 230 if (!height || !width) 231 return; 232 233 sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char); 234 } 235 236 static int sticon_switch(struct vc_data *conp) 237 { 238 return 1; /* needs refreshing */ 239 } 240 241 static int sticon_set_origin(struct vc_data *conp) 242 { 243 return 0; 244 } 245 246 static int sticon_blank(struct vc_data *c, int blank, int mode_switch) 247 { 248 if (blank == 0) { 249 if (mode_switch) 250 vga_is_gfx = 0; 251 return 1; 252 } 253 sticon_set_origin(c); 254 sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK); 255 if (mode_switch) 256 vga_is_gfx = 1; 257 return 1; 258 } 259 260 static int sticon_scrolldelta(struct vc_data *conp, int lines) 261 { 262 return 0; 263 } 264 265 static u16 *sticon_screen_pos(struct vc_data *conp, int offset) 266 { 267 int line; 268 unsigned long p; 269 270 if (conp->vc_num != fg_console || !softback_lines) 271 return (u16 *)(conp->vc_origin + offset); 272 line = offset / conp->vc_size_row; 273 if (line >= softback_lines) 274 return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row); 275 p = softback_curr + offset; 276 if (p >= softback_end) 277 p += softback_buf - softback_end; 278 return (u16 *)p; 279 } 280 281 static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos, 282 int *px, int *py) 283 { 284 int x, y; 285 unsigned long ret; 286 if (pos >= conp->vc_origin && pos < conp->vc_scr_end) { 287 unsigned long offset = (pos - conp->vc_origin) / 2; 288 289 x = offset % conp->vc_cols; 290 y = offset / conp->vc_cols; 291 if (conp->vc_num == fg_console) 292 y += softback_lines; 293 ret = pos + (conp->vc_cols - x) * 2; 294 } else if (conp->vc_num == fg_console && softback_lines) { 295 unsigned long offset = pos - softback_curr; 296 297 if (pos < softback_curr) 298 offset += softback_end - softback_buf; 299 offset /= 2; 300 x = offset % conp->vc_cols; 301 y = offset / conp->vc_cols; 302 ret = pos + (conp->vc_cols - x) * 2; 303 if (ret == softback_end) 304 ret = softback_buf; 305 if (ret == softback_in) 306 ret = conp->vc_origin; 307 } else { 308 /* Should not happen */ 309 x = y = 0; 310 ret = conp->vc_origin; 311 } 312 if (px) *px = x; 313 if (py) *py = y; 314 return ret; 315 } 316 317 static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens, 318 u8 blink, u8 underline, u8 reverse) 319 { 320 u8 attr = ((color & 0x70) >> 1) | ((color & 7)); 321 322 if (reverse) { 323 color = ((color >> 3) & 0x7) | ((color & 0x7) << 3); 324 } 325 326 return attr; 327 } 328 329 static void sticon_invert_region(struct vc_data *conp, u16 *p, int count) 330 { 331 int col = 1; /* vga_can_do_color; */ 332 333 while (count--) { 334 u16 a = scr_readw(p); 335 336 if (col) 337 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 338 else 339 a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; 340 341 scr_writew(a, p++); 342 } 343 } 344 345 static void sticon_save_screen(struct vc_data *conp) 346 { 347 } 348 349 static struct consw sti_con = { 350 .owner = THIS_MODULE, 351 .con_startup = sticon_startup, 352 .con_init = sticon_init, 353 .con_deinit = sticon_deinit, 354 .con_clear = sticon_clear, 355 .con_putc = sticon_putc, 356 .con_putcs = sticon_putcs, 357 .con_cursor = sticon_cursor, 358 .con_scroll = sticon_scroll, 359 .con_bmove = sticon_bmove, 360 .con_switch = sticon_switch, 361 .con_blank = sticon_blank, 362 .con_set_palette = sticon_set_palette, 363 .con_scrolldelta = sticon_scrolldelta, 364 .con_set_origin = sticon_set_origin, 365 .con_save_screen = sticon_save_screen, 366 .con_build_attr = sticon_build_attr, 367 .con_invert_region = sticon_invert_region, 368 .con_screen_pos = sticon_screen_pos, 369 .con_getxy = sticon_getxy, 370 }; 371 372 373 374 int __init sticonsole_init(void) 375 { 376 /* already initialized ? */ 377 if (sticon_sti) 378 return 0; 379 380 sticon_sti = sti_get_rom(0); 381 if (!sticon_sti) 382 return -ENODEV; 383 384 if (conswitchp == &dummy_con) { 385 printk(KERN_INFO "sticon: Initializing STI text console.\n"); 386 return take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1); 387 } 388 return 0; 389 } 390 391 module_init(sticonsole_init); 392 MODULE_LICENSE("GPL"); 393