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