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