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 bool sticon_scroll(struct vc_data *conp, unsigned int t, 157 unsigned int b, enum con_scroll dir, unsigned int count) 158 { 159 struct sti_struct *sti = sticon_sti; 160 161 if (vga_is_gfx) 162 return false; 163 164 sticon_cursor(conp, CM_ERASE); 165 166 switch (dir) { 167 case SM_UP: 168 sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols); 169 sti_clear(sti, b - count, 0, count, conp->vc_cols, conp->vc_video_erase_char); 170 break; 171 172 case SM_DOWN: 173 sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols); 174 sti_clear(sti, t, 0, count, conp->vc_cols, conp->vc_video_erase_char); 175 break; 176 } 177 178 return false; 179 } 180 181 static void sticon_init(struct vc_data *c, int init) 182 { 183 struct sti_struct *sti = sticon_sti; 184 int vc_cols, vc_rows; 185 186 sti_set(sti, 0, 0, sti_onscreen_y(sti), sti_onscreen_x(sti), 0); 187 vc_cols = sti_onscreen_x(sti) / sti->font_width; 188 vc_rows = sti_onscreen_y(sti) / sti->font_height; 189 c->vc_can_do_color = 1; 190 191 if (init) { 192 c->vc_cols = vc_cols; 193 c->vc_rows = vc_rows; 194 } else { 195 /* vc_rows = (c->vc_rows > vc_rows) ? vc_rows : c->vc_rows; */ 196 /* vc_cols = (c->vc_cols > vc_cols) ? vc_cols : c->vc_cols; */ 197 vc_resize(c, vc_cols, vc_rows); 198 /* vc_resize_con(vc_rows, vc_cols, c->vc_num); */ 199 } 200 } 201 202 static void sticon_deinit(struct vc_data *c) 203 { 204 } 205 206 static void sticon_clear(struct vc_data *conp, int sy, int sx, int height, 207 int width) 208 { 209 if (!height || !width) 210 return; 211 212 sti_clear(sticon_sti, sy, sx, height, width, conp->vc_video_erase_char); 213 } 214 215 static int sticon_switch(struct vc_data *conp) 216 { 217 return 1; /* needs refreshing */ 218 } 219 220 static int sticon_set_origin(struct vc_data *conp) 221 { 222 return 0; 223 } 224 225 static int sticon_blank(struct vc_data *c, int blank, int mode_switch) 226 { 227 if (blank == 0) { 228 if (mode_switch) 229 vga_is_gfx = 0; 230 return 1; 231 } 232 sticon_set_origin(c); 233 sti_clear(sticon_sti, 0,0, c->vc_rows, c->vc_cols, BLANK); 234 if (mode_switch) 235 vga_is_gfx = 1; 236 return 1; 237 } 238 239 static u16 *sticon_screen_pos(struct vc_data *conp, int offset) 240 { 241 int line; 242 unsigned long p; 243 244 if (conp->vc_num != fg_console || !softback_lines) 245 return (u16 *)(conp->vc_origin + offset); 246 line = offset / conp->vc_size_row; 247 if (line >= softback_lines) 248 return (u16 *)(conp->vc_origin + offset - softback_lines * conp->vc_size_row); 249 p = softback_curr + offset; 250 if (p >= softback_end) 251 p += softback_buf - softback_end; 252 return (u16 *)p; 253 } 254 255 static unsigned long sticon_getxy(struct vc_data *conp, unsigned long pos, 256 int *px, int *py) 257 { 258 int x, y; 259 unsigned long ret; 260 if (pos >= conp->vc_origin && pos < conp->vc_scr_end) { 261 unsigned long offset = (pos - conp->vc_origin) / 2; 262 263 x = offset % conp->vc_cols; 264 y = offset / conp->vc_cols; 265 if (conp->vc_num == fg_console) 266 y += softback_lines; 267 ret = pos + (conp->vc_cols - x) * 2; 268 } else if (conp->vc_num == fg_console && softback_lines) { 269 unsigned long offset = pos - softback_curr; 270 271 if (pos < softback_curr) 272 offset += softback_end - softback_buf; 273 offset /= 2; 274 x = offset % conp->vc_cols; 275 y = offset / conp->vc_cols; 276 ret = pos + (conp->vc_cols - x) * 2; 277 if (ret == softback_end) 278 ret = softback_buf; 279 if (ret == softback_in) 280 ret = conp->vc_origin; 281 } else { 282 /* Should not happen */ 283 x = y = 0; 284 ret = conp->vc_origin; 285 } 286 if (px) *px = x; 287 if (py) *py = y; 288 return ret; 289 } 290 291 static u8 sticon_build_attr(struct vc_data *conp, u8 color, u8 intens, 292 u8 blink, u8 underline, u8 reverse, u8 italic) 293 { 294 u8 attr = ((color & 0x70) >> 1) | ((color & 7)); 295 296 if (reverse) { 297 color = ((color >> 3) & 0x7) | ((color & 0x7) << 3); 298 } 299 300 return attr; 301 } 302 303 static void sticon_invert_region(struct vc_data *conp, u16 *p, int count) 304 { 305 int col = 1; /* vga_can_do_color; */ 306 307 while (count--) { 308 u16 a = scr_readw(p); 309 310 if (col) 311 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 312 else 313 a = ((a & 0x0700) == 0x0100) ? 0x7000 : 0x7700; 314 315 scr_writew(a, p++); 316 } 317 } 318 319 static void sticon_save_screen(struct vc_data *conp) 320 { 321 } 322 323 static const struct consw sti_con = { 324 .owner = THIS_MODULE, 325 .con_startup = sticon_startup, 326 .con_init = sticon_init, 327 .con_deinit = sticon_deinit, 328 .con_clear = sticon_clear, 329 .con_putc = sticon_putc, 330 .con_putcs = sticon_putcs, 331 .con_cursor = sticon_cursor, 332 .con_scroll = sticon_scroll, 333 .con_switch = sticon_switch, 334 .con_blank = sticon_blank, 335 .con_set_origin = sticon_set_origin, 336 .con_save_screen = sticon_save_screen, 337 .con_build_attr = sticon_build_attr, 338 .con_invert_region = sticon_invert_region, 339 .con_screen_pos = sticon_screen_pos, 340 .con_getxy = sticon_getxy, 341 }; 342 343 344 345 static int __init sticonsole_init(void) 346 { 347 int err; 348 /* already initialized ? */ 349 if (sticon_sti) 350 return 0; 351 352 sticon_sti = sti_get_rom(0); 353 if (!sticon_sti) 354 return -ENODEV; 355 356 if (conswitchp == &dummy_con) { 357 printk(KERN_INFO "sticon: Initializing STI text console.\n"); 358 console_lock(); 359 err = do_take_over_console(&sti_con, 0, MAX_NR_CONSOLES - 1, 1); 360 console_unlock(); 361 return err; 362 } 363 return 0; 364 } 365 366 module_init(sticonsole_init); 367 MODULE_LICENSE("GPL"); 368