linux/drivers/video/geode/lxfb_core.c
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   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[] __devinitdata = {
  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[] __devinitdata = {
 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 __devinit get_modedb(struct fb_videomode **modedb,
 230                unsigned int *size)
 231{
 232        if (olpc_has_dcon()) {
 233                *modedb = (struct fb_videomode *) olpc_dcon_modedb;
 234                *size = ARRAY_SIZE(olpc_dcon_modedb);
 235        } else {
 236                *modedb = (struct fb_videomode *) geode_modedb;
 237                *size = ARRAY_SIZE(geode_modedb);
 238        }
 239}
 240
 241#else
 242static void __devinit get_modedb(struct fb_videomode **modedb,
 243                unsigned int *size)
 244{
 245        *modedb = (struct fb_videomode *) geode_modedb;
 246        *size = ARRAY_SIZE(geode_modedb);
 247}
 248#endif
 249
 250static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 251{
 252        if (var->xres > 1920 || var->yres > 1440)
 253                return -EINVAL;
 254
 255        if (var->bits_per_pixel == 32) {
 256                var->red.offset   = 16; var->red.length   = 8;
 257                var->green.offset =  8; var->green.length = 8;
 258                var->blue.offset  =  0; var->blue.length  = 8;
 259        } else if (var->bits_per_pixel == 16) {
 260                var->red.offset   = 11; var->red.length   = 5;
 261                var->green.offset =  5; var->green.length = 6;
 262                var->blue.offset  =  0; var->blue.length  = 5;
 263        } else if (var->bits_per_pixel == 8) {
 264                var->red.offset   = 0; var->red.length   = 8;
 265                var->green.offset = 0; var->green.length = 8;
 266                var->blue.offset  = 0; var->blue.length  = 8;
 267        } else
 268                return -EINVAL;
 269
 270        var->transp.offset = 0; var->transp.length = 0;
 271
 272        /* Enough video memory? */
 273        if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres)
 274            > info->fix.smem_len)
 275          return -EINVAL;
 276
 277        return 0;
 278}
 279
 280static int lxfb_set_par(struct fb_info *info)
 281{
 282        if (info->var.bits_per_pixel > 8)
 283                info->fix.visual = FB_VISUAL_TRUECOLOR;
 284        else
 285                info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 286
 287        info->fix.line_length = lx_get_pitch(info->var.xres,
 288                info->var.bits_per_pixel);
 289
 290        lx_set_mode(info);
 291        return 0;
 292}
 293
 294static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
 295{
 296        chan &= 0xffff;
 297        chan >>= 16 - bf->length;
 298        return chan << bf->offset;
 299}
 300
 301static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 302                           unsigned blue, unsigned transp,
 303                           struct fb_info *info)
 304{
 305        if (info->var.grayscale) {
 306                /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 307                red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 308        }
 309
 310        /* Truecolor has hardware independent palette */
 311        if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 312                u32 *pal = info->pseudo_palette;
 313                u32 v;
 314
 315                if (regno >= 16)
 316                        return -EINVAL;
 317
 318                v  = chan_to_field(red, &info->var.red);
 319                v |= chan_to_field(green, &info->var.green);
 320                v |= chan_to_field(blue, &info->var.blue);
 321
 322                pal[regno] = v;
 323        } else {
 324                if (regno >= 256)
 325                        return -EINVAL;
 326
 327                lx_set_palette_reg(info, regno, red, green, blue);
 328        }
 329
 330        return 0;
 331}
 332
 333static int lxfb_blank(int blank_mode, struct fb_info *info)
 334{
 335        return lx_blank_display(info, blank_mode);
 336}
 337
 338
 339static int __devinit lxfb_map_video_memory(struct fb_info *info,
 340                                        struct pci_dev *dev)
 341{
 342        struct lxfb_par *par = info->par;
 343        int ret;
 344
 345        ret = pci_enable_device(dev);
 346
 347        if (ret)
 348                return ret;
 349
 350        ret = pci_request_region(dev, 0, "lxfb-framebuffer");
 351
 352        if (ret)
 353                return ret;
 354
 355        ret = pci_request_region(dev, 1, "lxfb-gp");
 356
 357        if (ret)
 358                return ret;
 359
 360        ret = pci_request_region(dev, 2, "lxfb-vg");
 361
 362        if (ret)
 363                return ret;
 364
 365        ret = pci_request_region(dev, 3, "lxfb-vp");
 366
 367        if (ret)
 368                return ret;
 369
 370        info->fix.smem_start = pci_resource_start(dev, 0);
 371        info->fix.smem_len = vram ? vram : lx_framebuffer_size();
 372
 373        info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
 374
 375        ret = -ENOMEM;
 376
 377        if (info->screen_base == NULL)
 378                return ret;
 379
 380        par->gp_regs = pci_ioremap_bar(dev, 1);
 381
 382        if (par->gp_regs == NULL)
 383                return ret;
 384
 385        par->dc_regs = pci_ioremap_bar(dev, 2);
 386
 387        if (par->dc_regs == NULL)
 388                return ret;
 389
 390        par->vp_regs = pci_ioremap_bar(dev, 3);
 391
 392        if (par->vp_regs == NULL)
 393                return ret;
 394
 395        write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
 396        write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
 397        write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
 398
 399        dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n",
 400                 info->fix.smem_len / 1024, info->fix.smem_start);
 401
 402        return 0;
 403}
 404
 405static struct fb_ops lxfb_ops = {
 406        .owner          = THIS_MODULE,
 407        .fb_check_var   = lxfb_check_var,
 408        .fb_set_par     = lxfb_set_par,
 409        .fb_setcolreg   = lxfb_setcolreg,
 410        .fb_blank       = lxfb_blank,
 411        /* No HW acceleration for now. */
 412        .fb_fillrect    = cfb_fillrect,
 413        .fb_copyarea    = cfb_copyarea,
 414        .fb_imageblit   = cfb_imageblit,
 415};
 416
 417static struct fb_info * __devinit lxfb_init_fbinfo(struct device *dev)
 418{
 419        struct lxfb_par *par;
 420        struct fb_info *info;
 421
 422        /* Alloc enough space for the pseudo palette. */
 423        info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16,
 424                                 dev);
 425        if (!info)
 426                return NULL;
 427
 428        par = info->par;
 429
 430        strcpy(info->fix.id, "Geode LX");
 431
 432        info->fix.type          = FB_TYPE_PACKED_PIXELS;
 433        info->fix.type_aux      = 0;
 434        info->fix.xpanstep      = 0;
 435        info->fix.ypanstep      = 0;
 436        info->fix.ywrapstep     = 0;
 437        info->fix.accel         = FB_ACCEL_NONE;
 438
 439        info->var.nonstd        = 0;
 440        info->var.activate      = FB_ACTIVATE_NOW;
 441        info->var.height        = -1;
 442        info->var.width = -1;
 443        info->var.accel_flags = 0;
 444        info->var.vmode = FB_VMODE_NONINTERLACED;
 445
 446        info->fbops             = &lxfb_ops;
 447        info->flags             = FBINFO_DEFAULT;
 448        info->node              = -1;
 449
 450        info->pseudo_palette    = (void *)par + sizeof(struct lxfb_par);
 451
 452        if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
 453                framebuffer_release(info);
 454                return NULL;
 455        }
 456
 457        info->var.grayscale     = 0;
 458
 459        return info;
 460}
 461
 462#ifdef CONFIG_PM
 463static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state)
 464{
 465        struct fb_info *info = pci_get_drvdata(pdev);
 466
 467        if (state.event == PM_EVENT_SUSPEND) {
 468                console_lock();
 469                lx_powerdown(info);
 470                fb_set_suspend(info, 1);
 471                console_unlock();
 472        }
 473
 474        /* there's no point in setting PCI states; we emulate PCI, so
 475         * we don't end up getting power savings anyways */
 476
 477        return 0;
 478}
 479
 480static int lxfb_resume(struct pci_dev *pdev)
 481{
 482        struct fb_info *info = pci_get_drvdata(pdev);
 483        int ret;
 484
 485        console_lock();
 486        ret = lx_powerup(info);
 487        if (ret) {
 488                printk(KERN_ERR "lxfb:  power up failed!\n");
 489                return ret;
 490        }
 491
 492        fb_set_suspend(info, 0);
 493        console_unlock();
 494        return 0;
 495}
 496#else
 497#define lxfb_suspend NULL
 498#define lxfb_resume NULL
 499#endif
 500
 501static int __devinit lxfb_probe(struct pci_dev *pdev,
 502                             const struct pci_device_id *id)
 503{
 504        struct lxfb_par *par;
 505        struct fb_info *info;
 506        int ret;
 507
 508        struct fb_videomode *modedb_ptr;
 509        unsigned int modedb_size;
 510
 511        info = lxfb_init_fbinfo(&pdev->dev);
 512
 513        if (info == NULL)
 514                return -ENOMEM;
 515
 516        par = info->par;
 517
 518        ret = lxfb_map_video_memory(info, pdev);
 519
 520        if (ret < 0) {
 521                dev_err(&pdev->dev,
 522                        "failed to map frame buffer or controller registers\n");
 523                goto err;
 524        }
 525
 526        /* Set up the desired outputs */
 527
 528        par->output = 0;
 529        par->output |= (nopanel) ? 0 : OUTPUT_PANEL;
 530        par->output |= (nocrt) ? 0 : OUTPUT_CRT;
 531
 532        /* Set up the mode database */
 533
 534        get_modedb(&modedb_ptr, &modedb_size);
 535        ret = fb_find_mode(&info->var, info, mode_option,
 536                           modedb_ptr, modedb_size, NULL, 16);
 537
 538        if (ret == 0 || ret == 4) {
 539                dev_err(&pdev->dev, "could not find valid video mode\n");
 540                ret = -EINVAL;
 541                goto err;
 542        }
 543
 544        /* Clear the screen of garbage, unless noclear was specified,
 545         * in which case we assume the user knows what he is doing */
 546
 547        if (!noclear)
 548                memset_io(info->screen_base, 0, info->fix.smem_len);
 549
 550        /* Set the mode */
 551
 552        lxfb_check_var(&info->var, info);
 553        lxfb_set_par(info);
 554
 555        pm_set_vt_switch(vt_switch);
 556
 557        if (register_framebuffer(info) < 0) {
 558                ret = -EINVAL;
 559                goto err;
 560        }
 561        pci_set_drvdata(pdev, info);
 562        printk(KERN_INFO "fb%d: %s frame buffer device\n",
 563                info->node, info->fix.id);
 564
 565        return 0;
 566
 567err:
 568        if (info->screen_base) {
 569                iounmap(info->screen_base);
 570                pci_release_region(pdev, 0);
 571        }
 572        if (par->gp_regs) {
 573                iounmap(par->gp_regs);
 574                pci_release_region(pdev, 1);
 575        }
 576        if (par->dc_regs) {
 577                iounmap(par->dc_regs);
 578                pci_release_region(pdev, 2);
 579        }
 580        if (par->vp_regs) {
 581                iounmap(par->vp_regs);
 582                pci_release_region(pdev, 3);
 583        }
 584
 585        if (info) {
 586                fb_dealloc_cmap(&info->cmap);
 587                framebuffer_release(info);
 588        }
 589
 590        return ret;
 591}
 592
 593static void __devexit lxfb_remove(struct pci_dev *pdev)
 594{
 595        struct fb_info *info = pci_get_drvdata(pdev);
 596        struct lxfb_par *par = info->par;
 597
 598        unregister_framebuffer(info);
 599
 600        iounmap(info->screen_base);
 601        pci_release_region(pdev, 0);
 602
 603        iounmap(par->gp_regs);
 604        pci_release_region(pdev, 1);
 605
 606        iounmap(par->dc_regs);
 607        pci_release_region(pdev, 2);
 608
 609        iounmap(par->vp_regs);
 610        pci_release_region(pdev, 3);
 611
 612        fb_dealloc_cmap(&info->cmap);
 613        pci_set_drvdata(pdev, NULL);
 614        framebuffer_release(info);
 615}
 616
 617static struct pci_device_id lxfb_id_table[] = {
 618        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
 619        { 0, }
 620};
 621
 622MODULE_DEVICE_TABLE(pci, lxfb_id_table);
 623
 624static struct pci_driver lxfb_driver = {
 625        .name           = "lxfb",
 626        .id_table       = lxfb_id_table,
 627        .probe          = lxfb_probe,
 628        .remove         = lxfb_remove,
 629        .suspend        = lxfb_suspend,
 630        .resume         = lxfb_resume,
 631};
 632
 633#ifndef MODULE
 634static int __init lxfb_setup(char *options)
 635{
 636        char *opt;
 637
 638        if (!options || !*options)
 639                return 0;
 640
 641        while ((opt = strsep(&options, ",")) != NULL) {
 642                if (!*opt)
 643                        continue;
 644
 645                if (!strcmp(opt, "noclear"))
 646                        noclear = 1;
 647                else if (!strcmp(opt, "nopanel"))
 648                        nopanel = 1;
 649                else if (!strcmp(opt, "nocrt"))
 650                        nocrt = 1;
 651                else
 652                        mode_option = opt;
 653        }
 654
 655        return 0;
 656}
 657#endif
 658
 659static int __init lxfb_init(void)
 660{
 661#ifndef MODULE
 662        char *option = NULL;
 663
 664        if (fb_get_options("lxfb", &option))
 665                return -ENODEV;
 666
 667        lxfb_setup(option);
 668#endif
 669        return pci_register_driver(&lxfb_driver);
 670}
 671static void __exit lxfb_cleanup(void)
 672{
 673        pci_unregister_driver(&lxfb_driver);
 674}
 675
 676module_init(lxfb_init);
 677module_exit(lxfb_cleanup);
 678
 679module_param(mode_option, charp, 0);
 680MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
 681
 682module_param(vram, int, 0);
 683MODULE_PARM_DESC(vram, "video memory size");
 684
 685module_param(vt_switch, int, 0);
 686MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");
 687
 688MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
 689MODULE_LICENSE("GPL");
 690
Hosted by Missing Link Electronics. The original LXR software by the LXR community, this experimental version by lxr@linux.no.