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