release/src-rt-6.x.4708/linux/linux-2.6.36/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
  97     sti_putc(sticon_sti, c, ypos, xpos);
  98
  99     if (redraw_cursor)
 100             vbl_cursor_cnt = CURSOR_DRAW_DELAY;
 101 }
 102
 103 static 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
 123 static 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
 148 static 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
 172 static 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
 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 int sticon_scrolldelta(struct vc_data *conp, int lines)
 240 {
 241     return 0;
 242 }
 243
 244 static 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
 260 static 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
 296 static 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
 308 static 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
 324 static void sticon_save_screen(struct vc_data *conp)
 325 {
 326 }
 327
 328 static 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
 353 static int __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
 370 module_init(sticonsole_init);
 371 MODULE_LICENSE("GPL");