drivers/video/fbdev/geode/lxfb_core.c

   1 /*
   2  * Geode LX framebuffer driver.
   3  *
   4  * Copyright (C) 2007 Advanced Micro Devices, Inc.
   5  * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.)
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/errno.h>
  16 #include <linux/string.h>
  17 #include <linux/console.h>
  18 #include <linux/mm.h>
  19 #include <linux/suspend.h>
  20 #include <linux/delay.h>
  21 #include <linux/fb.h>
  22 #include <linux/init.h>
  23 #include <linux/pci.h>
  24 #include <linux/uaccess.h>
  25
  26 #include "lxfb.h"
  27
  28 static char *mode_option;
  29 static int noclear, nopanel, nocrt;
  30 static int vram;
  31 static int vt_switch;
  32
  33 /* Most of these modes are sorted in ascending order, but
  34  * since the first entry in this table is the "default" mode,
  35  * we try to make it something sane - 640x480-60 is sane
  36  */
  37
  38 static struct fb_videomode geode_modedb[] = {
  39         /* 640x480-60 */
  40         { NULL, 60, 640, 480, 39682, 48, 8, 25, 2, 88, 2,
  41           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  42           FB_VMODE_NONINTERLACED, 0 },
  43         /* 640x400-70 */
  44         { NULL, 70, 640, 400, 39770, 40, 8, 28, 5, 96, 2,
  45           FB_SYNC_HOR_HIGH_ACT,
  46           FB_VMODE_NONINTERLACED, 0 },
  47         /* 640x480-70 */
  48         { NULL, 70, 640, 480, 35014, 88, 24, 15, 2, 64, 3,
  49           0, FB_VMODE_NONINTERLACED, 0 },
  50         /* 640x480-72 */
  51         { NULL, 72, 640, 480, 32102, 120, 16, 20, 1, 40, 3,
  52           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  53           FB_VMODE_NONINTERLACED, 0 },
  54         /* 640x480-75 */
  55         { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
  56           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  57           FB_VMODE_NONINTERLACED, 0 },
  58         /* 640x480-85 */
  59         { NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3,
  60           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  61           FB_VMODE_NONINTERLACED, 0 },
  62         /* 640x480-90 */
  63         { NULL, 90, 640, 480, 26392, 96, 32, 22, 1, 64, 3,
  64           0, FB_VMODE_NONINTERLACED, 0 },
  65         /* 640x480-100 */
  66         { NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3,
  67           0, FB_VMODE_NONINTERLACED, 0 },
  68         /* 640x480-60 */
  69         { NULL, 60, 640, 480, 39682, 48, 16, 25, 10, 88, 2,
  70           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  71           FB_VMODE_NONINTERLACED, 0 },
  72         /* 800x600-56 */
  73         { NULL, 56, 800, 600, 27901, 128, 24, 22, 1, 72, 2,
  74           0, FB_VMODE_NONINTERLACED, 0 },
  75         /* 800x600-60 */
  76         { NULL, 60, 800, 600, 25131, 72, 32, 23, 1, 136, 4,
  77           0, FB_VMODE_NONINTERLACED, 0 },
  78         /* 800x600-70 */
  79         { NULL, 70, 800, 600, 21873, 120, 40, 21, 4, 80, 3,
  80           0, FB_VMODE_NONINTERLACED, 0 },
  81         /* 800x600-72 */
  82         { NULL, 72, 800, 600, 20052, 64, 56, 23, 37, 120, 6,
  83           0, FB_VMODE_NONINTERLACED, 0 },
  84         /* 800x600-75 */
  85         { NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3,
  86           0, FB_VMODE_NONINTERLACED, 0 },
  87         /* 800x600-85 */
  88         { NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3,
  89           0, FB_VMODE_NONINTERLACED, 0 },
  90         /* 800x600-90 */
  91         { NULL, 90, 800, 600, 16648, 128, 40, 28, 1, 88, 3,
  92           0, FB_VMODE_NONINTERLACED, 0 },
  93         /* 800x600-100 */
  94         { NULL, 100, 800, 600, 14667, 136, 48, 27, 1, 88, 3,
  95           0, FB_VMODE_NONINTERLACED, 0 },
  96         /* 800x600-60 */
  97         { NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4,
  98           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  99           FB_VMODE_NONINTERLACED, 0 },
 100         /* 1024x768-60 */
 101         { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
 102           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 103           FB_VMODE_NONINTERLACED, 0 },
 104         /* 1024x768-70 */
 105         { NULL, 70, 1024, 768, 13346, 144, 24, 29, 3, 136, 6,
 106           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 107           FB_VMODE_NONINTERLACED, 0 },
 108         /* 1024x768-72 */
 109         { NULL, 72, 1024, 768, 12702, 168, 56, 29, 4, 112, 3,
 110           0, FB_VMODE_NONINTERLACED, 0 },
 111         /* 1024x768-75 */
 112         { NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3,
 113           0, FB_VMODE_NONINTERLACED, 0 },
 114         /* 1024x768-85 */
 115         { NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3,
 116           0, FB_VMODE_NONINTERLACED, 0 },
 117         /* 1024x768-90 */
 118         { NULL, 90, 1024, 768, 9981, 176, 64, 37, 1, 112, 3,
 119           0, FB_VMODE_NONINTERLACED, 0 },
 120         /* 1024x768-100 */
 121         { NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3,
 122           0, FB_VMODE_NONINTERLACED, 0 },
 123         /* 1024x768-60 */
 124         { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
 125           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 126           FB_VMODE_NONINTERLACED, 0 },
 127         /* 1152x864-60 */
 128         { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
 129           0, FB_VMODE_NONINTERLACED, 0 },
 130         /* 1152x864-70 */
 131         { NULL, 70, 1152, 864, 10254, 192, 72, 32, 8, 120, 3,
 132           0, FB_VMODE_NONINTERLACED, 0 },
 133         /* 1152x864-72 */
 134         { NULL, 72, 1152, 864, 9866, 200, 72, 33, 7, 128, 3,
 135           0, FB_VMODE_NONINTERLACED, 0 },
 136         /* 1152x864-75 */
 137         { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
 138           0, FB_VMODE_NONINTERLACED, 0 },
 139         /* 1152x864-85 */
 140         { NULL, 85, 1152, 864, 8357, 200, 72, 37, 3, 128, 3,
 141           0, FB_VMODE_NONINTERLACED, 0 },
 142         /* 1152x864-90 */
 143         { NULL, 90, 1152, 864, 7719, 208, 80, 42, 9, 128, 3,
 144           0, FB_VMODE_NONINTERLACED, 0 },
 145         /* 1152x864-100 */
 146         { NULL, 100, 1152, 864, 6947, 208, 80, 48, 3, 128, 3,
 147           0, FB_VMODE_NONINTERLACED, 0 },
 148         /* 1152x864-60 */
 149         { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
 150           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 151           FB_VMODE_NONINTERLACED, 0 },
 152         /* 1280x1024-60 */
 153         { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
 154           0, FB_VMODE_NONINTERLACED, 0 },
 155         /* 1280x1024-70 */
 156         { NULL, 70, 1280, 1024, 7719, 224, 88, 38, 6, 136, 3,
 157           0, FB_VMODE_NONINTERLACED, 0 },
 158         /* 1280x1024-72 */
 159         { NULL, 72, 1280, 1024, 7490, 224, 88, 39, 7, 136, 3,
 160           0, FB_VMODE_NONINTERLACED, 0 },
 161         /* 1280x1024-75 */
 162         { NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3,
 163           0, FB_VMODE_NONINTERLACED, 0 },
 164         /* 1280x1024-85 */
 165         { NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3,
 166           0, FB_VMODE_NONINTERLACED, 0 },
 167         /* 1280x1024-90 */
 168         { NULL, 90, 1280, 1024, 5791, 240, 96, 51, 12, 144, 3,
 169           0, FB_VMODE_NONINTERLACED, 0 },
 170         /* 1280x1024-100 */
 171         { NULL, 100, 1280, 1024, 5212, 240, 96, 57, 6, 144, 3,
 172           0, FB_VMODE_NONINTERLACED, 0 },
 173         /* 1280x1024-60 */
 174         { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
 175           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 176           FB_VMODE_NONINTERLACED, 0 },
 177         /* 1600x1200-60 */
 178         { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 179           0, FB_VMODE_NONINTERLACED, 0 },
 180         /* 1600x1200-70 */
 181         { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
 182           0, FB_VMODE_NONINTERLACED, 0 },
 183         /* 1600x1200-72 */
 184         { NULL, 72, 1600, 1200, 5053, 288, 112, 47, 13, 176, 3,
 185           0, FB_VMODE_NONINTERLACED, 0 },
 186         /* 1600x1200-75 */
 187         { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 188           0, FB_VMODE_NONINTERLACED, 0 },
 189         /* 1600x1200-85 */
 190         { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
 191           0, FB_VMODE_NONINTERLACED, 0 },
 192         /* 1600x1200-90 */
 193         { NULL, 90, 1600, 1200, 3981, 304, 128, 60, 1, 176, 3,
 194           0, FB_VMODE_NONINTERLACED, 0 },
 195         /* 1600x1200-100 */
 196         { NULL, 100, 1600, 1200, 3563, 304, 128, 67, 1, 176, 3,
 197           0, FB_VMODE_NONINTERLACED, 0 },
 198         /* 1600x1200-60 */
 199         { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 200           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 201           FB_VMODE_NONINTERLACED, 0 },
 202         /* 1920x1440-60 */
 203         { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3,
 204           0, FB_VMODE_NONINTERLACED, 0 },
 205         /* 1920x1440-70 */
 206         { NULL, 70, 1920, 1440, 3593, 360, 152, 55, 8, 208, 3,
 207           0, FB_VMODE_NONINTERLACED, 0 },
 208         /* 1920x1440-72 */
 209         { NULL, 72, 1920, 1440, 3472, 360, 152, 68, 4, 208, 3,
 210           0, FB_VMODE_NONINTERLACED, 0 },
 211         /* 1920x1440-75 */
 212         { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
 213           0, FB_VMODE_NONINTERLACED, 0 },
 214         /* 1920x1440-85 */
 215         { NULL, 85, 1920, 1440, 2929, 368, 152, 68, 1, 216, 3,
 216           0, FB_VMODE_NONINTERLACED, 0 },
 217 };
 218
 219 #ifdef CONFIG_OLPC
 220 #include <asm/olpc.h>
 221
 222 static struct fb_videomode olpc_dcon_modedb[] = {
 223         /* The only mode the DCON has is 1200x900 */
 224         { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
 225           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 226           FB_VMODE_NONINTERLACED, 0 }
 227 };
 228
 229 static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
 230 {
 231         if (olpc_has_dcon()) {
 232                 *modedb = (struct fb_videomode *) olpc_dcon_modedb;
 233                 *size = ARRAY_SIZE(olpc_dcon_modedb);
 234         } else {
 235                 *modedb = (struct fb_videomode *) geode_modedb;
 236                 *size = ARRAY_SIZE(geode_modedb);
 237         }
 238 }
 239
 240 #else
 241 static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
 242 {
 243         *modedb = (struct fb_videomode *) geode_modedb;
 244         *size = ARRAY_SIZE(geode_modedb);
 245 }
 246 #endif
 247
 248 static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 249 {
 250         if (var->xres > 1920 || var->yres > 1440)
 251                 return -EINVAL;
 252
 253         if (var->bits_per_pixel == 32) {
 254                 var->red.offset   = 16; var->red.length   = 8;
 255                 var->green.offset =  8; var->green.length = 8;
 256                 var->blue.offset  =  0; var->blue.length  = 8;
 257         } else if (var->bits_per_pixel == 16) {
 258                 var->red.offset   = 11; var->red.length   = 5;
 259                 var->green.offset =  5; var->green.length = 6;
 260                 var->blue.offset  =  0; var->blue.length  = 5;
 261         } else if (var->bits_per_pixel == 8) {
 262                 var->red.offset   = 0; var->red.length   = 8;
 263                 var->green.offset = 0; var->green.length = 8;
 264                 var->blue.offset  = 0; var->blue.length  = 8;
 265         } else
 266                 return -EINVAL;
 267
 268         var->transp.offset = 0; var->transp.length = 0;
 269
 270         /* Enough video memory? */
 271         if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres)
 272             > info->fix.smem_len)
 273           return -EINVAL;
 274
 275         return 0;
 276 }
 277
 278 static int lxfb_set_par(struct fb_info *info)
 279 {
 280         if (info->var.bits_per_pixel > 8)
 281                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 282         else
 283                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 284
 285         info->fix.line_length = lx_get_pitch(info->var.xres,
 286                 info->var.bits_per_pixel);
 287
 288         lx_set_mode(info);
 289         return 0;
 290 }
 291
 292 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 293 {
 294         chan &= 0xffff;
 295         chan >>= 16 - bf->length;
 296         return chan << bf->offset;
 297 }
 298
 299 static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 300                            unsigned blue, unsigned transp,
 301                            struct fb_info *info)
 302 {
 303         if (info->var.grayscale) {
 304                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 305                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 306         }
 307
 308         /* Truecolor has hardware independent palette */
 309         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 310                 u32 *pal = info->pseudo_palette;
 311                 u32 v;
 312
 313                 if (regno >= 16)
 314                         return -EINVAL;
 315
 316                 v  = chan_to_field(red, &info->var.red);
 317                 v |= chan_to_field(green, &info->var.green);
 318                 v |= chan_to_field(blue, &info->var.blue);
 319
 320                 pal[regno] = v;
 321         } else {
 322                 if (regno >= 256)
 323                         return -EINVAL;
 324
 325                 lx_set_palette_reg(info, regno, red, green, blue);
 326         }
 327
 328         return 0;
 329 }
 330
 331 static int lxfb_blank(int blank_mode, struct fb_info *info)
 332 {
 333         return lx_blank_display(info, blank_mode);
 334 }
 335
 336
 337 static int lxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
 338 {
 339         struct lxfb_par *par = info->par;
 340         int ret;
 341
 342         ret = pci_enable_device(dev);
 343
 344         if (ret)
 345                 return ret;
 346
 347         ret = pci_request_region(dev, 0, "lxfb-framebuffer");
 348
 349         if (ret)
 350                 return ret;
 351
 352         ret = pci_request_region(dev, 1, "lxfb-gp");
 353
 354         if (ret)
 355                 return ret;
 356
 357         ret = pci_request_region(dev, 2, "lxfb-vg");
 358
 359         if (ret)
 360                 return ret;
 361
 362         ret = pci_request_region(dev, 3, "lxfb-vp");
 363
 364         if (ret)
 365                 return ret;
 366
 367         info->fix.smem_start = pci_resource_start(dev, 0);
 368         info->fix.smem_len = vram ? vram : lx_framebuffer_size();
 369
 370         info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
 371
 372         ret = -ENOMEM;
 373
 374         if (info->screen_base == NULL)
 375                 return ret;
 376
 377         par->gp_regs = pci_ioremap_bar(dev, 1);
 378
 379         if (par->gp_regs == NULL)
 380                 return ret;
 381
 382         par->dc_regs = pci_ioremap_bar(dev, 2);
 383
 384         if (par->dc_regs == NULL)
 385                 return ret;
 386
 387         par->vp_regs = pci_ioremap_bar(dev, 3);
 388
 389         if (par->vp_regs == NULL)
 390                 return ret;
 391
 392         write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
 393         write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
 394         write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
 395
 396         dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n",
 397                  info->fix.smem_len / 1024, info->fix.smem_start);
 398
 399         return 0;
 400 }
 401
 402 static struct fb_ops lxfb_ops = {
 403         .owner          = THIS_MODULE,
 404         .fb_check_var   = lxfb_check_var,
 405         .fb_set_par     = lxfb_set_par,
 406         .fb_setcolreg   = lxfb_setcolreg,
 407         .fb_blank       = lxfb_blank,
 408         /* No HW acceleration for now. */
 409         .fb_fillrect    = cfb_fillrect,
 410         .fb_copyarea    = cfb_copyarea,
 411         .fb_imageblit   = cfb_imageblit,
 412 };
 413
 414 static struct fb_info *lxfb_init_fbinfo(struct device *dev)
 415 {
 416         struct lxfb_par *par;
 417         struct fb_info *info;
 418
 419         /* Alloc enough space for the pseudo palette. */
 420         info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16,
 421                                  dev);
 422         if (!info)
 423                 return NULL;
 424
 425         par = info->par;
 426
 427         strcpy(info->fix.id, "Geode LX");
 428
 429         info->fix.type          = FB_TYPE_PACKED_PIXELS;
 430         info->fix.type_aux      = 0;
 431         info->fix.xpanstep      = 0;
 432         info->fix.ypanstep      = 0;
 433         info->fix.ywrapstep     = 0;
 434         info->fix.accel         = FB_ACCEL_NONE;
 435
 436         info->var.nonstd        = 0;
 437         info->var.activate      = FB_ACTIVATE_NOW;
 438         info->var.height        = -1;
 439         info->var.width = -1;
 440         info->var.accel_flags = 0;
 441         info->var.vmode = FB_VMODE_NONINTERLACED;
 442
 443         info->fbops             = &lxfb_ops;
 444         info->flags             = FBINFO_DEFAULT;
 445         info->node              = -1;
 446
 447         info->pseudo_palette    = (void *)par + sizeof(struct lxfb_par);
 448
 449         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
 450                 framebuffer_release(info);
 451                 return NULL;
 452         }
 453
 454         info->var.grayscale     = 0;
 455
 456         return info;
 457 }
 458
 459 #ifdef CONFIG_PM
 460 static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state)
 461 {
 462         struct fb_info *info = pci_get_drvdata(pdev);
 463
 464         if (state.event == PM_EVENT_SUSPEND) {
 465                 console_lock();
 466                 lx_powerdown(info);
 467                 fb_set_suspend(info, 1);
 468                 console_unlock();
 469         }
 470
 471         /* there's no point in setting PCI states; we emulate PCI, so
 472          * we don't end up getting power savings anyways */
 473
 474         return 0;
 475 }
 476
 477 static int lxfb_resume(struct pci_dev *pdev)
 478 {
 479         struct fb_info *info = pci_get_drvdata(pdev);
 480         int ret;
 481
 482         console_lock();
 483         ret = lx_powerup(info);
 484         if (ret) {
 485                 printk(KERN_ERR "lxfb:  power up failed!\n");
 486                 return ret;
 487         }
 488
 489         fb_set_suspend(info, 0);
 490         console_unlock();
 491         return 0;
 492 }
 493 #else
 494 #define lxfb_suspend NULL
 495 #define lxfb_resume NULL
 496 #endif
 497
 498 static int lxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 499 {
 500         struct lxfb_par *par;
 501         struct fb_info *info;
 502         int ret;
 503
 504         struct fb_videomode *modedb_ptr;
 505         unsigned int modedb_size;
 506
 507         info = lxfb_init_fbinfo(&pdev->dev);
 508
 509         if (info == NULL)
 510                 return -ENOMEM;
 511
 512         par = info->par;
 513
 514         ret = lxfb_map_video_memory(info, pdev);
 515
 516         if (ret < 0) {
 517                 dev_err(&pdev->dev,
 518                         "failed to map frame buffer or controller registers\n");
 519                 goto err;
 520         }
 521
 522         /* Set up the desired outputs */
 523
 524         par->output = 0;
 525         par->output |= (nopanel) ? 0 : OUTPUT_PANEL;
 526         par->output |= (nocrt) ? 0 : OUTPUT_CRT;
 527
 528         /* Set up the mode database */
 529
 530         get_modedb(&modedb_ptr, &modedb_size);
 531         ret = fb_find_mode(&info->var, info, mode_option,
 532                            modedb_ptr, modedb_size, NULL, 16);
 533
 534         if (ret == 0 || ret == 4) {
 535                 dev_err(&pdev->dev, "could not find valid video mode\n");
 536                 ret = -EINVAL;
 537                 goto err;
 538         }
 539
 540         /* Clear the screen of garbage, unless noclear was specified,
 541          * in which case we assume the user knows what he is doing */
 542
 543         if (!noclear)
 544                 memset_io(info->screen_base, 0, info->fix.smem_len);
 545
 546         /* Set the mode */
 547
 548         lxfb_check_var(&info->var, info);
 549         lxfb_set_par(info);
 550
 551         pm_set_vt_switch(vt_switch);
 552
 553         if (register_framebuffer(info) < 0) {
 554                 ret = -EINVAL;
 555                 goto err;
 556         }
 557         pci_set_drvdata(pdev, info);
 558         fb_info(info, "%s frame buffer device\n", info->fix.id);
 559
 560         return 0;
 561
 562 err:
 563         if (info->screen_base) {
 564                 iounmap(info->screen_base);
 565                 pci_release_region(pdev, 0);
 566         }
 567         if (par->gp_regs) {
 568                 iounmap(par->gp_regs);
 569                 pci_release_region(pdev, 1);
 570         }
 571         if (par->dc_regs) {
 572                 iounmap(par->dc_regs);
 573                 pci_release_region(pdev, 2);
 574         }
 575         if (par->vp_regs) {
 576                 iounmap(par->vp_regs);
 577                 pci_release_region(pdev, 3);
 578         }
 579
 580         fb_dealloc_cmap(&info->cmap);
 581         framebuffer_release(info);
 582
 583         return ret;
 584 }
 585
 586 static void lxfb_remove(struct pci_dev *pdev)
 587 {
 588         struct fb_info *info = pci_get_drvdata(pdev);
 589         struct lxfb_par *par = info->par;
 590
 591         unregister_framebuffer(info);
 592
 593         iounmap(info->screen_base);
 594         pci_release_region(pdev, 0);
 595
 596         iounmap(par->gp_regs);
 597         pci_release_region(pdev, 1);
 598
 599         iounmap(par->dc_regs);
 600         pci_release_region(pdev, 2);
 601
 602         iounmap(par->vp_regs);
 603         pci_release_region(pdev, 3);
 604
 605         fb_dealloc_cmap(&info->cmap);
 606         framebuffer_release(info);
 607 }
 608
 609 static struct pci_device_id lxfb_id_table[] = {
 610         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
 611         { 0, }
 612 };
 613
 614 MODULE_DEVICE_TABLE(pci, lxfb_id_table);
 615
 616 static struct pci_driver lxfb_driver = {
 617         .name           = "lxfb",
 618         .id_table       = lxfb_id_table,
 619         .probe          = lxfb_probe,
 620         .remove         = lxfb_remove,
 621         .suspend        = lxfb_suspend,
 622         .resume         = lxfb_resume,
 623 };
 624
 625 #ifndef MODULE
 626 static int __init lxfb_setup(char *options)
 627 {
 628         char *opt;
 629
 630         if (!options || !*options)
 631                 return 0;
 632
 633         while ((opt = strsep(&options, ",")) != NULL) {
 634                 if (!*opt)
 635                         continue;
 636
 637                 if (!strcmp(opt, "noclear"))
 638                         noclear = 1;
 639                 else if (!strcmp(opt, "nopanel"))
 640                         nopanel = 1;
 641                 else if (!strcmp(opt, "nocrt"))
 642                         nocrt = 1;
 643                 else
 644                         mode_option = opt;
 645         }
 646
 647         return 0;
 648 }
 649 #endif
 650
 651 static int __init lxfb_init(void)
 652 {
 653 #ifndef MODULE
 654         char *option = NULL;
 655
 656         if (fb_get_options("lxfb", &option))
 657                 return -ENODEV;
 658
 659         lxfb_setup(option);
 660 #endif
 661         return pci_register_driver(&lxfb_driver);
 662 }
 663 static void __exit lxfb_cleanup(void)
 664 {
 665         pci_unregister_driver(&lxfb_driver);
 666 }
 667
 668 module_init(lxfb_init);
 669 module_exit(lxfb_cleanup);
 670
 671 module_param(mode_option, charp, 0);
 672 MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
 673
 674 module_param(vram, int, 0);
 675 MODULE_PARM_DESC(vram, "video memory size");
 676
 677 module_param(vt_switch, int, 0);
 678 MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
 679
 680 MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
 681 MODULE_LICENSE("GPL");