LXR linux/drivers/video/fbdev/geode/lxfb

   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
  28static char *mode_option;
  29static int noclear, nopanel, nocrt;
  30static int vram;
  31static 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
  38static 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
 222static 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
 229static 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
 241static 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
 248static 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
 278static 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
 292static 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
 299static 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
 331static int lxfb_blank(int blank_mode, struct fb_info *info)
 332{
 333        return lx_blank_display(info, blank_mode);
 334}
 335
 336
 337static 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
 402static 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
 414static 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
 460static 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
 477static 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
 498static 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
 562err:
 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
 586static 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
 609static struct pci_device_id lxfb_id_table[] = {
 610        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
 611        { 0, }
 612};
 613
 614MODULE_DEVICE_TABLE(pci, lxfb_id_table);
 615
 616static 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
 626static 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
 651static 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}
 663static void __exit lxfb_cleanup(void)
 664{
 665        pci_unregister_driver(&lxfb_driver);
 666}
 667
 668module_init(lxfb_init);
 669module_exit(lxfb_cleanup);
 670
 671module_param(mode_option, charp, 0);
 672MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
 673
 674module_param(vram, int, 0);
 675MODULE_PARM_DESC(vram, "video memory size");
 676
 677module_param(vt_switch, int, 0);
 678MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
 679
 680MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
 681MODULE_LICENSE("GPL");
 682