drivers/video/vt8623fb.c

   1 /*
   2  * linux/drivers/video/vt8623fb.c - fbdev driver for
   3  * integrated graphic core in VIA VT8623 [CLE266] chipset
   4  *
   5  * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file COPYING in the main directory of this archive for
   9  * more details.
  10  *
  11  * Code is based on s3fb, some parts are from David Boucher's viafb
  12  * (http://davesdomain.org.uk/viafb/)
  13  */
  14
  15 #include <linux/version.h>
  16 #include <linux/module.h>
  17 #include <linux/kernel.h>
  18 #include <linux/errno.h>
  19 #include <linux/string.h>
  20 #include <linux/mm.h>
  21 #include <linux/tty.h>
  22 #include <linux/slab.h>
  23 #include <linux/delay.h>
  24 #include <linux/fb.h>
  25 #include <linux/svga.h>
  26 #include <linux/init.h>
  27 #include <linux/pci.h>
  28 #include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
  29 #include <video/vga.h>
  30
  31 #ifdef CONFIG_MTRR
  32 #include <asm/mtrr.h>
  33 #endif
  34
  35 struct vt8623fb_info {
  36         char __iomem *mmio_base;
  37         int mtrr_reg;
  38         struct vgastate state;
  39         struct mutex open_lock;
  40         unsigned int ref_count;
  41         u32 pseudo_palette[16];
  42 };
  43
  44
  45
  46 /* ------------------------------------------------------------------------- */
  47
  48 static const struct svga_fb_format vt8623fb_formats[] = {
  49         { 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
  50                 FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8,   FB_VISUAL_PSEUDOCOLOR, 16, 16},
  51         { 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
  52                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_PSEUDOCOLOR, 16, 16},
  53         { 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 1,
  54                 FB_TYPE_INTERLEAVED_PLANES, 1,          FB_VISUAL_PSEUDOCOLOR, 16, 16},
  55         { 8,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
  56                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_PSEUDOCOLOR, 8, 8},
  57 /*      {16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
  58                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 4, 4},     */
  59         {16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
  60                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 4, 4},
  61         {32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
  62                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 2, 2},
  63         SVGA_FORMAT_END
  64 };
  65
  66 static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
  67         60000, 300000, 14318};
  68
  69 /* CRT timing register sets */
  70
  71 static struct vga_regset vt8623_h_total_regs[]       = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
  72 static struct vga_regset vt8623_h_display_regs[]     = {{0x01, 0, 7}, VGA_REGSET_END};
  73 static struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
  74 static struct vga_regset vt8623_h_blank_end_regs[]   = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
  75 static struct vga_regset vt8623_h_sync_start_regs[]  = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
  76 static struct vga_regset vt8623_h_sync_end_regs[]    = {{0x05, 0, 4}, VGA_REGSET_END};
  77
  78 static struct vga_regset vt8623_v_total_regs[]       = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
  79 static struct vga_regset vt8623_v_display_regs[]     = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
  80 static struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
  81 static struct vga_regset vt8623_v_blank_end_regs[]   = {{0x16, 0, 7}, VGA_REGSET_END};
  82 static struct vga_regset vt8623_v_sync_start_regs[]  = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
  83 static struct vga_regset vt8623_v_sync_end_regs[]    = {{0x11, 0, 3}, VGA_REGSET_END};
  84
  85 static struct vga_regset vt8623_offset_regs[]        = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
  86 static struct vga_regset vt8623_line_compare_regs[]  = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END};
  87 static struct vga_regset vt8623_fetch_count_regs[]   = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
  88 static struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
  89
  90 static struct svga_timing_regs vt8623_timing_regs     = {
  91         vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
  92         vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
  93         vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
  94         vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
  95 };
  96
  97
  98 /* ------------------------------------------------------------------------- */
  99
 100
 101 /* Module parameters */
 102
 103 static char *mode_option = "640x480-8@60";
 104
 105 #ifdef CONFIG_MTRR
 106 static int mtrr = 1;
 107 #endif
 108
 109 MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
 110 MODULE_LICENSE("GPL");
 111 MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");
 112
 113 module_param(mode_option, charp, 0644);
 114 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
 115 module_param_named(mode, mode_option, charp, 0);
 116 MODULE_PARM_DESC(mode, "Default video mode e.g. '648x480-8@60' (deprecated)");
 117
 118 #ifdef CONFIG_MTRR
 119 module_param(mtrr, int, 0444);
 120 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
 121 #endif
 122
 123
 124 /* ------------------------------------------------------------------------- */
 125
 126
 127 static struct fb_tile_ops vt8623fb_tile_ops = {
 128         .fb_settile     = svga_settile,
 129         .fb_tilecopy    = svga_tilecopy,
 130         .fb_tilefill    = svga_tilefill,
 131         .fb_tileblit    = svga_tileblit,
 132         .fb_tilecursor  = svga_tilecursor,
 133         .fb_get_tilemax = svga_get_tilemax,
 134 };
 135
 136
 137 /* ------------------------------------------------------------------------- */
 138
 139
 140 /* image data is MSB-first, fb structure is MSB-first too */
 141 static inline u32 expand_color(u32 c)
 142 {
 143         return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
 144 }
 145
 146 /* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
 147 static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
 148 {
 149         u32 fg = expand_color(image->fg_color);
 150         u32 bg = expand_color(image->bg_color);
 151         const u8 *src1, *src;
 152         u8 __iomem *dst1;
 153         u32 __iomem *dst;
 154         u32 val;
 155         int x, y;
 156
 157         src1 = image->data;
 158         dst1 = info->screen_base + (image->dy * info->fix.line_length)
 159                  + ((image->dx / 8) * 4);
 160
 161         for (y = 0; y < image->height; y++) {
 162                 src = src1;
 163                 dst = (u32 __iomem *) dst1;
 164                 for (x = 0; x < image->width; x += 8) {
 165                         val = *(src++) * 0x01010101;
 166                         val = (val & fg) | (~val & bg);
 167                         fb_writel(val, dst++);
 168                 }
 169                 src1 += image->width / 8;
 170                 dst1 += info->fix.line_length;
 171         }
 172 }
 173
 174 /* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
 175 static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 176 {
 177         u32 fg = expand_color(rect->color);
 178         u8 __iomem *dst1;
 179         u32 __iomem *dst;
 180         int x, y;
 181
 182         dst1 = info->screen_base + (rect->dy * info->fix.line_length)
 183                  + ((rect->dx / 8) * 4);
 184
 185         for (y = 0; y < rect->height; y++) {
 186                 dst = (u32 __iomem *) dst1;
 187                 for (x = 0; x < rect->width; x += 8) {
 188                         fb_writel(fg, dst++);
 189                 }
 190                 dst1 += info->fix.line_length;
 191         }
 192 }
 193
 194
 195 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
 196 static inline u32 expand_pixel(u32 c)
 197 {
 198         return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
 199                 ((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
 200 }
 201
 202 /* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
 203 static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
 204 {
 205         u32 fg = image->fg_color * 0x11111111;
 206         u32 bg = image->bg_color * 0x11111111;
 207         const u8 *src1, *src;
 208         u8 __iomem *dst1;
 209         u32 __iomem *dst;
 210         u32 val;
 211         int x, y;
 212
 213         src1 = image->data;
 214         dst1 = info->screen_base + (image->dy * info->fix.line_length)
 215                  + ((image->dx / 8) * 4);
 216
 217         for (y = 0; y < image->height; y++) {
 218                 src = src1;
 219                 dst = (u32 __iomem *) dst1;
 220                 for (x = 0; x < image->width; x += 8) {
 221                         val = expand_pixel(*(src++));
 222                         val = (val & fg) | (~val & bg);
 223                         fb_writel(val, dst++);
 224                 }
 225                 src1 += image->width / 8;
 226                 dst1 += info->fix.line_length;
 227         }
 228 }
 229
 230 static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
 231 {
 232         if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
 233             && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
 234                 if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
 235                         vt8623fb_iplan_imageblit(info, image);
 236                 else
 237                         vt8623fb_cfb4_imageblit(info, image);
 238         } else
 239                 cfb_imageblit(info, image);
 240 }
 241
 242 static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 243 {
 244         if ((info->var.bits_per_pixel == 4)
 245             && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
 246             && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
 247                 vt8623fb_iplan_fillrect(info, rect);
 248          else
 249                 cfb_fillrect(info, rect);
 250 }
 251
 252
 253 /* ------------------------------------------------------------------------- */
 254
 255
 256 static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
 257 {
 258         u16 m, n, r;
 259         u8 regval;
 260         int rv;
 261
 262         rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
 263         if (rv < 0) {
 264                 printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
 265                 return;
 266         }
 267
 268         /* Set VGA misc register  */
 269         regval = vga_r(NULL, VGA_MIS_R);
 270         vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
 271
 272         /* Set clock registers */
 273         vga_wseq(NULL, 0x46, (n  | (r << 6)));
 274         vga_wseq(NULL, 0x47, m);
 275
 276         udelay(1000);
 277
 278         /* PLL reset */
 279         svga_wseq_mask(0x40, 0x02, 0x02);
 280         svga_wseq_mask(0x40, 0x00, 0x02);
 281 }
 282
 283
 284 static int vt8623fb_open(struct fb_info *info, int user)
 285 {
 286         struct vt8623fb_info *par = info->par;
 287
 288         mutex_lock(&(par->open_lock));
 289         if (par->ref_count == 0) {
 290                 memset(&(par->state), 0, sizeof(struct vgastate));
 291                 par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
 292                 par->state.num_crtc = 0xA2;
 293                 par->state.num_seq = 0x50;
 294                 save_vga(&(par->state));
 295         }
 296
 297         par->ref_count++;
 298         mutex_unlock(&(par->open_lock));
 299
 300         return 0;
 301 }
 302
 303 static int vt8623fb_release(struct fb_info *info, int user)
 304 {
 305         struct vt8623fb_info *par = info->par;
 306
 307         mutex_lock(&(par->open_lock));
 308         if (par->ref_count == 0) {
 309                 mutex_unlock(&(par->open_lock));
 310                 return -EINVAL;
 311         }
 312
 313         if (par->ref_count == 1)
 314                 restore_vga(&(par->state));
 315
 316         par->ref_count--;
 317         mutex_unlock(&(par->open_lock));
 318
 319         return 0;
 320 }
 321
 322 static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 323 {
 324         int rv, mem, step;
 325
 326         /* Find appropriate format */
 327         rv = svga_match_format (vt8623fb_formats, var, NULL);
 328         if (rv < 0)
 329         {
 330                 printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
 331                 return rv;
 332         }
 333
 334         /* Do not allow to have real resoulution larger than virtual */
 335         if (var->xres > var->xres_virtual)
 336                 var->xres_virtual = var->xres;
 337
 338         if (var->yres > var->yres_virtual)
 339                 var->yres_virtual = var->yres;
 340
 341         /* Round up xres_virtual to have proper alignment of lines */
 342         step = vt8623fb_formats[rv].xresstep - 1;
 343         var->xres_virtual = (var->xres_virtual+step) & ~step;
 344
 345         /* Check whether have enough memory */
 346         mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
 347         if (mem > info->screen_size)
 348         {
 349                 printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n", info->node, mem >> 10, (unsigned int) (info->screen_size >> 10));
 350                 return -EINVAL;
 351         }
 352
 353         /* Text mode is limited to 256 kB of memory */
 354         if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
 355         {
 356                 printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10);
 357                 return -EINVAL;
 358         }
 359
 360         rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
 361         if (rv < 0)
 362         {
 363                 printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
 364                 return rv;
 365         }
 366
 367         /* Interlaced mode not supported */
 368         if (var->vmode & FB_VMODE_INTERLACED)
 369                 return -EINVAL;
 370
 371         return 0;
 372 }
 373
 374
 375 static int vt8623fb_set_par(struct fb_info *info)
 376 {
 377         u32 mode, offset_value, fetch_value, screen_size;
 378         u32 bpp = info->var.bits_per_pixel;
 379
 380         if (bpp != 0) {
 381                 info->fix.ypanstep = 1;
 382                 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
 383
 384                 info->flags &= ~FBINFO_MISC_TILEBLITTING;
 385                 info->tileops = NULL;
 386
 387                 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
 388                 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
 389                 info->pixmap.blit_y = ~(u32)0;
 390
 391                 offset_value = (info->var.xres_virtual * bpp) / 64;
 392                 fetch_value  = ((info->var.xres * bpp) / 128) + 4;
 393
 394                 if (bpp == 4)
 395                         fetch_value  = (info->var.xres / 8) + 8; /* + 0 is OK */
 396
 397                 screen_size  = info->var.yres_virtual * info->fix.line_length;
 398         } else {
 399                 info->fix.ypanstep = 16;
 400                 info->fix.line_length = 0;
 401
 402                 info->flags |= FBINFO_MISC_TILEBLITTING;
 403                 info->tileops = &vt8623fb_tile_ops;
 404
 405                 /* supports 8x16 tiles only */
 406                 info->pixmap.blit_x = 1 << (8 - 1);
 407                 info->pixmap.blit_y = 1 << (16 - 1);
 408
 409                 offset_value = info->var.xres_virtual / 16;
 410                 fetch_value  = (info->var.xres / 8) + 8;
 411                 screen_size  = (info->var.xres_virtual * info->var.yres_virtual) / 64;
 412         }
 413
 414         info->var.xoffset = 0;
 415         info->var.yoffset = 0;
 416         info->var.activate = FB_ACTIVATE_NOW;
 417
 418         /* Unlock registers */
 419         svga_wseq_mask(0x10, 0x01, 0x01);
 420         svga_wcrt_mask(0x11, 0x00, 0x80);
 421         svga_wcrt_mask(0x47, 0x00, 0x01);
 422
 423         /* Device, screen and sync off */
 424         svga_wseq_mask(0x01, 0x20, 0x20);
 425         svga_wcrt_mask(0x36, 0x30, 0x30);
 426         svga_wcrt_mask(0x17, 0x00, 0x80);
 427
 428         /* Set default values */
 429         svga_set_default_gfx_regs();
 430         svga_set_default_atc_regs();
 431         svga_set_default_seq_regs();
 432         svga_set_default_crt_regs();
 433         svga_wcrt_multi(vt8623_line_compare_regs, 0xFFFFFFFF);
 434         svga_wcrt_multi(vt8623_start_address_regs, 0);
 435
 436         svga_wcrt_multi(vt8623_offset_regs, offset_value);
 437         svga_wseq_multi(vt8623_fetch_count_regs, fetch_value);
 438
 439         /* Clear H/V Skew */
 440         svga_wcrt_mask(0x03, 0x00, 0x60);
 441         svga_wcrt_mask(0x05, 0x00, 0x60);
 442
 443         if (info->var.vmode & FB_VMODE_DOUBLE)
 444                 svga_wcrt_mask(0x09, 0x80, 0x80);
 445         else
 446                 svga_wcrt_mask(0x09, 0x00, 0x80);
 447
 448         svga_wseq_mask(0x1E, 0xF0, 0xF0); // DI/DVP bus
 449         svga_wseq_mask(0x2A, 0x0F, 0x0F); // DI/DVP bus
 450         svga_wseq_mask(0x16, 0x08, 0xBF); // FIFO read treshold
 451         vga_wseq(NULL, 0x17, 0x1F);       // FIFO depth
 452         vga_wseq(NULL, 0x18, 0x4E);
 453         svga_wseq_mask(0x1A, 0x08, 0x08); // enable MMIO ?
 454
 455         vga_wcrt(NULL, 0x32, 0x00);
 456         vga_wcrt(NULL, 0x34, 0x00);
 457         vga_wcrt(NULL, 0x6A, 0x80);
 458         vga_wcrt(NULL, 0x6A, 0xC0);
 459
 460         vga_wgfx(NULL, 0x20, 0x00);
 461         vga_wgfx(NULL, 0x21, 0x00);
 462         vga_wgfx(NULL, 0x22, 0x00);
 463
 464         /* Set SR15 according to number of bits per pixel */
 465         mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
 466         switch (mode) {
 467         case 0:
 468                 pr_debug("fb%d: text mode\n", info->node);
 469                 svga_set_textmode_vga_regs();
 470                 svga_wseq_mask(0x15, 0x00, 0xFE);
 471                 svga_wcrt_mask(0x11, 0x60, 0x70);
 472                 break;
 473         case 1:
 474                 pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
 475                 vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
 476                 svga_wseq_mask(0x15, 0x20, 0xFE);
 477                 svga_wcrt_mask(0x11, 0x00, 0x70);
 478                 break;
 479         case 2:
 480                 pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
 481                 svga_wseq_mask(0x15, 0x00, 0xFE);
 482                 svga_wcrt_mask(0x11, 0x00, 0x70);
 483                 break;
 484         case 3:
 485                 pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
 486                 svga_wseq_mask(0x15, 0x22, 0xFE);
 487                 break;
 488         case 4:
 489                 pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
 490                 svga_wseq_mask(0x15, 0xB6, 0xFE);
 491                 break;
 492         case 5:
 493                 pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
 494                 svga_wseq_mask(0x15, 0xAE, 0xFE);
 495                 break;
 496         default:
 497                 printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
 498                 return (-EINVAL);
 499         }
 500
 501         vt8623_set_pixclock(info, info->var.pixclock);
 502         svga_set_timings(&vt8623_timing_regs, &(info->var), 1, 1,
 503                          (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
 504                          1, info->node);
 505
 506         memset_io(info->screen_base, 0x00, screen_size);
 507
 508         /* Device and screen back on */
 509         svga_wcrt_mask(0x17, 0x80, 0x80);
 510         svga_wcrt_mask(0x36, 0x00, 0x30);
 511         svga_wseq_mask(0x01, 0x00, 0x20);
 512
 513         return 0;
 514 }
 515
 516
 517 static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 518                                 u_int transp, struct fb_info *fb)
 519 {
 520         switch (fb->var.bits_per_pixel) {
 521         case 0:
 522         case 4:
 523                 if (regno >= 16)
 524                         return -EINVAL;
 525
 526                 outb(0x0F, VGA_PEL_MSK);
 527                 outb(regno, VGA_PEL_IW);
 528                 outb(red >> 10, VGA_PEL_D);
 529                 outb(green >> 10, VGA_PEL_D);
 530                 outb(blue >> 10, VGA_PEL_D);
 531                 break;
 532         case 8:
 533                 if (regno >= 256)
 534                         return -EINVAL;
 535
 536                 outb(0xFF, VGA_PEL_MSK);
 537                 outb(regno, VGA_PEL_IW);
 538                 outb(red >> 10, VGA_PEL_D);
 539                 outb(green >> 10, VGA_PEL_D);
 540                 outb(blue >> 10, VGA_PEL_D);
 541                 break;
 542         case 16:
 543                 if (regno >= 16)
 544                         return 0;
 545
 546                 if (fb->var.green.length == 5)
 547                         ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
 548                                 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
 549                 else if (fb->var.green.length == 6)
 550                         ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
 551                                 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
 552                 else
 553                         return -EINVAL;
 554                 break;
 555         case 24:
 556         case 32:
 557                 if (regno >= 16)
 558                         return 0;
 559
 560                 /* ((transp & 0xFF00) << 16) */
 561                 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
 562                         (green & 0xFF00) | ((blue & 0xFF00) >> 8);
 563                 break;
 564         default:
 565                 return -EINVAL;
 566         }
 567
 568         return 0;
 569 }
 570
 571
 572 static int vt8623fb_blank(int blank_mode, struct fb_info *info)
 573 {
 574         switch (blank_mode) {
 575         case FB_BLANK_UNBLANK:
 576                 pr_debug("fb%d: unblank\n", info->node);
 577                 svga_wcrt_mask(0x36, 0x00, 0x30);
 578                 svga_wseq_mask(0x01, 0x00, 0x20);
 579                 break;
 580         case FB_BLANK_NORMAL:
 581                 pr_debug("fb%d: blank\n", info->node);
 582                 svga_wcrt_mask(0x36, 0x00, 0x30);
 583                 svga_wseq_mask(0x01, 0x20, 0x20);
 584                 break;
 585         case FB_BLANK_HSYNC_SUSPEND:
 586                 pr_debug("fb%d: DPMS standby (hsync off)\n", info->node);
 587                 svga_wcrt_mask(0x36, 0x10, 0x30);
 588                 svga_wseq_mask(0x01, 0x20, 0x20);
 589                 break;
 590         case FB_BLANK_VSYNC_SUSPEND:
 591                 pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node);
 592                 svga_wcrt_mask(0x36, 0x20, 0x30);
 593                 svga_wseq_mask(0x01, 0x20, 0x20);
 594                 break;
 595         case FB_BLANK_POWERDOWN:
 596                 pr_debug("fb%d: DPMS off (no sync)\n", info->node);
 597                 svga_wcrt_mask(0x36, 0x30, 0x30);
 598                 svga_wseq_mask(0x01, 0x20, 0x20);
 599                 break;
 600         }
 601
 602         return 0;
 603 }
 604
 605
 606 static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 607 {
 608         unsigned int offset;
 609
 610         /* Calculate the offset */
 611         if (var->bits_per_pixel == 0) {
 612                 offset = (var->yoffset / 16) * var->xres_virtual + var->xoffset;
 613                 offset = offset >> 3;
 614         } else {
 615                 offset = (var->yoffset * info->fix.line_length) +
 616                          (var->xoffset * var->bits_per_pixel / 8);
 617                 offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1);
 618         }
 619
 620         /* Set the offset */
 621         svga_wcrt_multi(vt8623_start_address_regs, offset);
 622
 623         return 0;
 624 }
 625
 626
 627 /* ------------------------------------------------------------------------- */
 628
 629
 630 /* Frame buffer operations */
 631
 632 static struct fb_ops vt8623fb_ops = {
 633         .owner          = THIS_MODULE,
 634         .fb_open        = vt8623fb_open,
 635         .fb_release     = vt8623fb_release,
 636         .fb_check_var   = vt8623fb_check_var,
 637         .fb_set_par     = vt8623fb_set_par,
 638         .fb_setcolreg   = vt8623fb_setcolreg,
 639         .fb_blank       = vt8623fb_blank,
 640         .fb_pan_display = vt8623fb_pan_display,
 641         .fb_fillrect    = vt8623fb_fillrect,
 642         .fb_copyarea    = cfb_copyarea,
 643         .fb_imageblit   = vt8623fb_imageblit,
 644         .fb_get_caps    = svga_get_caps,
 645 };
 646
 647
 648 /* PCI probe */
 649
 650 static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 651 {
 652         struct fb_info *info;
 653         struct vt8623fb_info *par;
 654         unsigned int memsize1, memsize2;
 655         int rc;
 656
 657         /* Ignore secondary VGA device because there is no VGA arbitration */
 658         if (! svga_primary_device(dev)) {
 659                 dev_info(&(dev->dev), "ignoring secondary device\n");
 660                 return -ENODEV;
 661         }
 662
 663         /* Allocate and fill driver data structure */
 664         info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
 665         if (! info) {
 666                 dev_err(&(dev->dev), "cannot allocate memory\n");
 667                 return -ENOMEM;
 668         }
 669
 670         par = info->par;
 671         mutex_init(&par->open_lock);
 672
 673         info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
 674         info->fbops = &vt8623fb_ops;
 675
 676         /* Prepare PCI device */
 677
 678         rc = pci_enable_device(dev);
 679         if (rc < 0) {
 680                 dev_err(info->dev, "cannot enable PCI device\n");
 681                 goto err_enable_device;
 682         }
 683
 684         rc = pci_request_regions(dev, "vt8623fb");
 685         if (rc < 0) {
 686                 dev_err(info->dev, "cannot reserve framebuffer region\n");
 687                 goto err_request_regions;
 688         }
 689
 690         info->fix.smem_start = pci_resource_start(dev, 0);
 691         info->fix.smem_len = pci_resource_len(dev, 0);
 692         info->fix.mmio_start = pci_resource_start(dev, 1);
 693         info->fix.mmio_len = pci_resource_len(dev, 1);
 694
 695         /* Map physical IO memory address into kernel space */
 696         info->screen_base = pci_iomap(dev, 0, 0);
 697         if (! info->screen_base) {
 698                 rc = -ENOMEM;
 699                 dev_err(info->dev, "iomap for framebuffer failed\n");
 700                 goto err_iomap_1;
 701         }
 702
 703         par->mmio_base = pci_iomap(dev, 1, 0);
 704         if (! par->mmio_base) {
 705                 rc = -ENOMEM;
 706                 dev_err(info->dev, "iomap for MMIO failed\n");
 707                 goto err_iomap_2;
 708         }
 709
 710         /* Find how many physical memory there is on card */
 711         memsize1 = (vga_rseq(NULL, 0x34) + 1) >> 1;
 712         memsize2 = vga_rseq(NULL, 0x39) << 2;
 713
 714         if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
 715                 info->screen_size = memsize1 << 20;
 716         else {
 717                 dev_err(info->dev, "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
 718                 info->screen_size = 16 << 20;
 719         }
 720
 721         info->fix.smem_len = info->screen_size;
 722         strcpy(info->fix.id, "VIA VT8623");
 723         info->fix.type = FB_TYPE_PACKED_PIXELS;
 724         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 725         info->fix.ypanstep = 0;
 726         info->fix.accel = FB_ACCEL_NONE;
 727         info->pseudo_palette = (void*)par->pseudo_palette;
 728
 729         /* Prepare startup mode */
 730
 731         rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
 732         if (! ((rc == 1) || (rc == 2))) {
 733                 rc = -EINVAL;
 734                 dev_err(info->dev, "mode %s not found\n", mode_option);
 735                 goto err_find_mode;
 736         }
 737
 738         rc = fb_alloc_cmap(&info->cmap, 256, 0);
 739         if (rc < 0) {
 740                 dev_err(info->dev, "cannot allocate colormap\n");
 741                 goto err_alloc_cmap;
 742         }
 743
 744         rc = register_framebuffer(info);
 745         if (rc < 0) {
 746                 dev_err(info->dev, "cannot register framebugger\n");
 747                 goto err_reg_fb;
 748         }
 749
 750         printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
 751                  pci_name(dev), info->fix.smem_len >> 20);
 752
 753         /* Record a reference to the driver data */
 754         pci_set_drvdata(dev, info);
 755
 756 #ifdef CONFIG_MTRR
 757         if (mtrr) {
 758                 par->mtrr_reg = -1;
 759                 par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
 760         }
 761 #endif
 762
 763         return 0;
 764
 765         /* Error handling */
 766 err_reg_fb:
 767         fb_dealloc_cmap(&info->cmap);
 768 err_alloc_cmap:
 769 err_find_mode:
 770         pci_iounmap(dev, par->mmio_base);
 771 err_iomap_2:
 772         pci_iounmap(dev, info->screen_base);
 773 err_iomap_1:
 774         pci_release_regions(dev);
 775 err_request_regions:
 776 /*      pci_disable_device(dev); */
 777 err_enable_device:
 778         framebuffer_release(info);
 779         return rc;
 780 }
 781
 782 /* PCI remove */
 783
 784 static void __devexit vt8623_pci_remove(struct pci_dev *dev)
 785 {
 786         struct fb_info *info = pci_get_drvdata(dev);
 787
 788         if (info) {
 789                 struct vt8623fb_info *par = info->par;
 790
 791 #ifdef CONFIG_MTRR
 792                 if (par->mtrr_reg >= 0) {
 793                         mtrr_del(par->mtrr_reg, 0, 0);
 794                         par->mtrr_reg = -1;
 795                 }
 796 #endif
 797
 798                 unregister_framebuffer(info);
 799                 fb_dealloc_cmap(&info->cmap);
 800
 801                 pci_iounmap(dev, info->screen_base);
 802                 pci_iounmap(dev, par->mmio_base);
 803                 pci_release_regions(dev);
 804 /*              pci_disable_device(dev); */
 805
 806                 pci_set_drvdata(dev, NULL);
 807                 framebuffer_release(info);
 808         }
 809 }
 810
 811
 812 #ifdef CONFIG_PM
 813 /* PCI suspend */
 814
 815 static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
 816 {
 817         struct fb_info *info = pci_get_drvdata(dev);
 818         struct vt8623fb_info *par = info->par;
 819
 820         dev_info(info->dev, "suspend\n");
 821
 822         acquire_console_sem();
 823         mutex_lock(&(par->open_lock));
 824
 825         if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
 826                 mutex_unlock(&(par->open_lock));
 827                 release_console_sem();
 828                 return 0;
 829         }
 830
 831         fb_set_suspend(info, 1);
 832
 833         pci_save_state(dev);
 834         pci_disable_device(dev);
 835         pci_set_power_state(dev, pci_choose_state(dev, state));
 836
 837         mutex_unlock(&(par->open_lock));
 838         release_console_sem();
 839
 840         return 0;
 841 }
 842
 843
 844 /* PCI resume */
 845
 846 static int vt8623_pci_resume(struct pci_dev* dev)
 847 {
 848         struct fb_info *info = pci_get_drvdata(dev);
 849         struct vt8623fb_info *par = info->par;
 850
 851         dev_info(info->dev, "resume\n");
 852
 853         acquire_console_sem();
 854         mutex_lock(&(par->open_lock));
 855
 856         if (par->ref_count == 0) {
 857                 mutex_unlock(&(par->open_lock));
 858                 release_console_sem();
 859                 return 0;
 860         }
 861
 862         pci_set_power_state(dev, PCI_D0);
 863         pci_restore_state(dev);
 864
 865         if (pci_enable_device(dev))
 866                 goto fail;
 867
 868         pci_set_master(dev);
 869
 870         vt8623fb_set_par(info);
 871         fb_set_suspend(info, 0);
 872
 873         mutex_unlock(&(par->open_lock));
 874 fail:
 875         release_console_sem();
 876
 877         return 0;
 878 }
 879 #else
 880 #define vt8623_pci_suspend NULL
 881 #define vt8623_pci_resume NULL
 882 #endif /* CONFIG_PM */
 883
 884 /* List of boards that we are trying to support */
 885
 886 static struct pci_device_id vt8623_devices[] __devinitdata = {
 887         {PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
 888         {0, 0, 0, 0, 0, 0, 0}
 889 };
 890
 891 MODULE_DEVICE_TABLE(pci, vt8623_devices);
 892
 893 static struct pci_driver vt8623fb_pci_driver = {
 894         .name           = "vt8623fb",
 895         .id_table       = vt8623_devices,
 896         .probe          = vt8623_pci_probe,
 897         .remove         = __devexit_p(vt8623_pci_remove),
 898         .suspend        = vt8623_pci_suspend,
 899         .resume         = vt8623_pci_resume,
 900 };
 901
 902 /* Cleanup */
 903
 904 static void __exit vt8623fb_cleanup(void)
 905 {
 906         pr_debug("vt8623fb: cleaning up\n");
 907         pci_unregister_driver(&vt8623fb_pci_driver);
 908 }
 909
 910 /* Driver Initialisation */
 911
 912 static int __init vt8623fb_init(void)
 913 {
 914
 915 #ifndef MODULE
 916         char *option = NULL;
 917
 918         if (fb_get_options("vt8623fb", &option))
 919                 return -ENODEV;
 920
 921         if (option && *option)
 922                 mode_option = option;
 923 #endif
 924
 925         pr_debug("vt8623fb: initializing\n");
 926         return pci_register_driver(&vt8623fb_pci_driver);
 927 }
 928
 929 /* ------------------------------------------------------------------------- */
 930
 931 /* Modularization */
 932
 933 module_init(vt8623fb_init);
 934 module_exit(vt8623fb_cleanup);