drivers/video/console/sticon.c

   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");