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intelfbdrv.c

/*
 * intelfb
 *
 * Linux framebuffer driver for Intel(R) 830M/845G/852GM/855GM/865G/915G/915GM/
 * 945G/945GM integrated graphics chips.
 *
 * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
 *                   2004 Sylvain Meyer
 *                   2006 David Airlie
 *
 * This driver consists of two parts.  The first part (intelfbdrv.c) provides
 * the basic fbdev interfaces, is derived in part from the radeonfb and
 * vesafb drivers, and is covered by the GPL.  The second part (intelfbhw.c)
 * provides the code to program the hardware.  Most of it is derived from
 * the i810/i830 XFree86 driver.  The HW-specific code is covered here
 * under a dual license (GPL and MIT/XFree86 license).
 *
 * Author: David Dawes
 *
 */

/* $DHD: intelfb/intelfbdrv.c,v 1.20 2003/06/27 15:17:40 dawes Exp $ */

/*
 * Changes:
 *    01/2003 - Initial driver (0.1.0), no mode switching, no acceleration.
 *          This initial version is a basic core that works a lot like
 *          the vesafb driver.  It must be built-in to the kernel,
 *          and the initial video mode must be set with vga=XXX at
 *          boot time.  (David Dawes)
 *
 *    01/2003 - Version 0.2.0: Mode switching added, colormap support
 *          implemented, Y panning, and soft screen blanking implemented.
 *          No acceleration yet.  (David Dawes)
 *
 *    01/2003 - Version 0.3.0: fbcon acceleration support added.  Module
 *          option handling added.  (David Dawes)
 *
 *    01/2003 - Version 0.4.0: fbcon HW cursor support added.  (David Dawes)
 *
 *    01/2003 - Version 0.4.1: Add auto-generation of built-in modes.
 *          (David Dawes)
 *
 *    02/2003 - Version 0.4.2: Add check for active non-CRT devices, and
 *          mode validation checks.  (David Dawes)
 *
 *    02/2003 - Version 0.4.3: Check when the VC is in graphics mode so that
 *          acceleration is disabled while an XFree86 server is running.
 *          (David Dawes)
 *
 *    02/2003 - Version 0.4.4: Monitor DPMS support.  (David Dawes)
 *
 *    02/2003 - Version 0.4.5: Basic XFree86 + fbdev working.  (David Dawes)
 *
 *    02/2003 - Version 0.5.0: Modify to work with the 2.5.32 kernel as well
 *          as 2.4.x kernels.  (David Dawes)
 *
 *    02/2003 - Version 0.6.0: Split out HW-specifics into a separate file.
 *          (David Dawes)
 *
 *    02/2003 - Version 0.7.0: Test on 852GM/855GM.  Acceleration and HW
 *          cursor are disabled on this platform.  (David Dawes)
 *
 *    02/2003 - Version 0.7.1: Test on 845G.  Acceleration is disabled
 *          on this platform.  (David Dawes)
 *
 *    02/2003 - Version 0.7.2: Test on 830M.  Acceleration and HW
 *          cursor are disabled on this platform.  (David Dawes)
 *
 *    02/2003 - Version 0.7.3: Fix 8-bit modes for mobile platforms
 *          (David Dawes)
 *
 *    02/2003 - Version 0.7.4: Add checks for FB and FBCON_HAS_CFB* configured
 *          in the kernel, and add mode bpp verification and default
 *          bpp selection based on which FBCON_HAS_CFB* are configured.
 *          (David Dawes)
 *
 *    02/2003 - Version 0.7.5: Add basic package/install scripts based on the
 *          DRI packaging scripts.  (David Dawes)
 *
 *    04/2003 - Version 0.7.6: Fix typo that affects builds with SMP-enabled
 *          kernels.  (David Dawes, reported by Anupam).
 *
 *    06/2003 - Version 0.7.7:
 *              Fix Makefile.kernel build problem (Tsutomu Yasuda).
 *          Fix mis-placed #endif (2.4.21 kernel).
 *
 *    09/2004 - Version 0.9.0 - by Sylvain Meyer
 *              Port to linux 2.6 kernel fbdev
 *              Fix HW accel and HW cursor on i845G
 *              Use of agpgart for fb memory reservation
 *              Add mtrr support
 *
 *    10/2004 - Version 0.9.1
 *              Use module_param instead of old MODULE_PARM
 *              Some cleanup
 *
 *    11/2004 - Version 0.9.2
 *              Add vram option to reserve more memory than stolen by BIOS
 *              Fix intelfbhw_pan_display typo
 *              Add __initdata annotations
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/screen_info.h>

#include <asm/io.h>

#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

#include "intelfb.h"
#include "intelfbhw.h"
#include "../edid.h"

static void __devinit get_initial_mode(struct intelfb_info *dinfo);
static void update_dinfo(struct intelfb_info *dinfo,
                   struct fb_var_screeninfo *var);
static int intelfb_open(struct fb_info *info, int user);
static int intelfb_release(struct fb_info *info, int user);
static int intelfb_check_var(struct fb_var_screeninfo *var,
                       struct fb_info *info);
static int intelfb_set_par(struct fb_info *info);
static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
                       unsigned blue, unsigned transp,
                       struct fb_info *info);

static int intelfb_blank(int blank, struct fb_info *info);
static int intelfb_pan_display(struct fb_var_screeninfo *var,
                         struct fb_info *info);

static void intelfb_fillrect(struct fb_info *info,
                       const struct fb_fillrect *rect);
static void intelfb_copyarea(struct fb_info *info,
                       const struct fb_copyarea *region);
static void intelfb_imageblit(struct fb_info *info,
                        const struct fb_image *image);
static int intelfb_cursor(struct fb_info *info,
                     struct fb_cursor *cursor);

static int intelfb_sync(struct fb_info *info);

static int intelfb_ioctl(struct fb_info *info,
                   unsigned int cmd, unsigned long arg);

static int __devinit intelfb_pci_register(struct pci_dev *pdev,
                                const struct pci_device_id *ent);
static void __devexit intelfb_pci_unregister(struct pci_dev *pdev);
static int __devinit intelfb_set_fbinfo(struct intelfb_info *dinfo);

/*
 * Limiting the class to PCI_CLASS_DISPLAY_VGA prevents function 1 of the
 * mobile chipsets from being registered.
 */
#if DETECT_VGA_CLASS_ONLY
#define INTELFB_CLASS_MASK ~0 << 8
#else
#define INTELFB_CLASS_MASK 0
#endif

static struct pci_device_id intelfb_pci_table[] __devinitdata = {
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_830M, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_830M },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_845G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_845G },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_85XGM, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_85XGM },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_865G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_865G },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_915G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_915G },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_915GM, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_915GM },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_945G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_945G },
      { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_945GM, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_945GM },
      { 0, }
};

/* Global data */
static int num_registered = 0;

/* fb ops */
static struct fb_ops intel_fb_ops = {
      .owner =          THIS_MODULE,
      .fb_open =              intelfb_open,
      .fb_release =           intelfb_release,
      .fb_check_var =         intelfb_check_var,
      .fb_set_par =           intelfb_set_par,
      .fb_setcolreg =         intelfb_setcolreg,
      .fb_blank =       intelfb_blank,
      .fb_pan_display =       intelfb_pan_display,
      .fb_fillrect  =         intelfb_fillrect,
      .fb_copyarea  =         intelfb_copyarea,
      .fb_imageblit =         intelfb_imageblit,
      .fb_cursor =            intelfb_cursor,
      .fb_sync =              intelfb_sync,
      .fb_ioctl =       intelfb_ioctl
};

/* PCI driver module table */
static struct pci_driver intelfb_driver = {
      .name =           "intelfb",
      .id_table = intelfb_pci_table,
      .probe =    intelfb_pci_register,
      .remove =   __devexit_p(intelfb_pci_unregister)
};

/* Module description/parameters */
MODULE_AUTHOR("David Dawes <dawes@tungstengraphics.com>, "
            "Sylvain Meyer <sylvain.meyer@worldonline.fr>");
MODULE_DESCRIPTION("Framebuffer driver for Intel(R) " SUPPORTED_CHIPSETS
               " chipsets");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DEVICE_TABLE(pci, intelfb_pci_table);

static int accel        = 1;
static int vram         = 4;
static int hwcursor     = 0;
static int mtrr         = 1;
static int fixed        = 0;
static int noinit       = 0;
static int noregister   = 0;
static int probeonly    = 0;
static int idonly       = 0;
static int bailearly    = 0;
static int voffset      = 48;
static char *mode       = NULL;

module_param(accel, bool, S_IRUGO);
MODULE_PARM_DESC(accel, "Enable hardware acceleration");
module_param(vram, int, S_IRUGO);
MODULE_PARM_DESC(vram, "System RAM to allocate to framebuffer in MiB");
module_param(voffset, int, S_IRUGO);
MODULE_PARM_DESC(voffset, "Offset of framebuffer in MiB");
module_param(hwcursor, bool, S_IRUGO);
MODULE_PARM_DESC(hwcursor, "Enable HW cursor");
module_param(mtrr, bool, S_IRUGO);
MODULE_PARM_DESC(mtrr, "Enable MTRR support");
module_param(fixed, bool, S_IRUGO);
MODULE_PARM_DESC(fixed, "Disable mode switching");
module_param(noinit, bool, 0);
MODULE_PARM_DESC(noinit, "Don't initialise graphics mode when loading");
module_param(noregister, bool, 0);
MODULE_PARM_DESC(noregister, "Don't register, just probe and exit (debug)");
module_param(probeonly, bool, 0);
MODULE_PARM_DESC(probeonly, "Do a minimal probe (debug)");
module_param(idonly, bool, 0);
MODULE_PARM_DESC(idonly, "Just identify without doing anything else (debug)");
module_param(bailearly, bool, 0);
MODULE_PARM_DESC(bailearly, "Bail out early, depending on value (debug)");
module_param(mode, charp, S_IRUGO);
MODULE_PARM_DESC(mode,
             "Initial video mode \"<xres>x<yres>[-<depth>][@<refresh>]\"");

#ifndef MODULE
#define OPT_EQUAL(opt, name) (!strncmp(opt, name, strlen(name)))
#define OPT_INTVAL(opt, name) simple_strtoul(opt + strlen(name) + 1, NULL, 0)
#define OPT_STRVAL(opt, name) (opt + strlen(name))

static __inline__ char * get_opt_string(const char *this_opt, const char *name)
{
      const char *p;
      int i;
      char *ret;

      p = OPT_STRVAL(this_opt, name);
      i = 0;
      while (p[i] && p[i] != ' ' && p[i] != ',')
            i++;
      ret = kmalloc(i + 1, GFP_KERNEL);
      if (ret) {
            strncpy(ret, p, i);
            ret[i] = '\0';
      }
      return ret;
}

static __inline__ int get_opt_int(const char *this_opt, const char *name,
                          int *ret)
{
      if (!ret)
            return 0;

      if (!OPT_EQUAL(this_opt, name))
            return 0;

      *ret = OPT_INTVAL(this_opt, name);
      return 1;
}

static __inline__ int get_opt_bool(const char *this_opt, const char *name,
                           int *ret)
{
      if (!ret)
            return 0;

      if (OPT_EQUAL(this_opt, name)) {
            if (this_opt[strlen(name)] == '=')
                  *ret = simple_strtoul(this_opt + strlen(name) + 1,
                                    NULL, 0);
            else
                  *ret = 1;
      } else {
            if (OPT_EQUAL(this_opt, "no") && OPT_EQUAL(this_opt + 2, name))
                  *ret = 0;
            else
                  return 0;
      }
      return 1;
}

static int __init intelfb_setup(char *options)
{
      char *this_opt;

      DBG_MSG("intelfb_setup\n");

      if (!options || !*options) {
            DBG_MSG("no options\n");
            return 0;
      } else
            DBG_MSG("options: %s\n", options);

      /*
       * These are the built-in options analogous to the module parameters
       * defined above.
       *
       * The syntax is:
       *
       *    video=intelfb:[mode][,<param>=<val>] ...
       *
       * e.g.,
       *
       *    video=intelfb:1024x768-16@75,accel=0
       */

      while ((this_opt = strsep(&options, ","))) {
            if (!*this_opt)
                  continue;
            if (get_opt_bool(this_opt, "accel", &accel))
                  ;
            else if (get_opt_int(this_opt, "vram", &vram))
                  ;
            else if (get_opt_bool(this_opt, "hwcursor", &hwcursor))
                  ;
            else if (get_opt_bool(this_opt, "mtrr", &mtrr))
                  ;
            else if (get_opt_bool(this_opt, "fixed", &fixed))
                  ;
            else if (get_opt_bool(this_opt, "init", &noinit))
                  noinit = !noinit;
            else if (OPT_EQUAL(this_opt, "mode="))
                  mode = get_opt_string(this_opt, "mode=");
            else
                  mode = this_opt;
      }

      return 0;
}

#endif

static int __init intelfb_init(void)
{
#ifndef MODULE
      char *option = NULL;
#endif

      DBG_MSG("intelfb_init\n");

      INF_MSG("Framebuffer driver for "
            "Intel(R) " SUPPORTED_CHIPSETS " chipsets\n");
      INF_MSG("Version " INTELFB_VERSION "\n");

      if (idonly)
            return -ENODEV;

#ifndef MODULE
      if (fb_get_options("intelfb", &option))
            return -ENODEV;
      intelfb_setup(option);
#endif

      return pci_register_driver(&intelfb_driver);
}

static void __exit intelfb_exit(void)
{
      DBG_MSG("intelfb_exit\n");
      pci_unregister_driver(&intelfb_driver);
}

module_init(intelfb_init);
module_exit(intelfb_exit);

/***************************************************************
 *                     mtrr support functions                  *
 ***************************************************************/

#ifdef CONFIG_MTRR
static inline void __devinit set_mtrr(struct intelfb_info *dinfo)
{
      dinfo->mtrr_reg = mtrr_add(dinfo->aperture.physical,
                           dinfo->aperture.size, MTRR_TYPE_WRCOMB, 1);
      if (dinfo->mtrr_reg < 0) {
            ERR_MSG("unable to set MTRR\n");
            return;
      }
      dinfo->has_mtrr = 1;
}
static inline void unset_mtrr(struct intelfb_info *dinfo)
{
      if (dinfo->has_mtrr)
            mtrr_del(dinfo->mtrr_reg, dinfo->aperture.physical,
                   dinfo->aperture.size);
}
#else
#define set_mtrr(x) WRN_MSG("MTRR is disabled in the kernel\n")

#define unset_mtrr(x) do { } while (0)
#endif /* CONFIG_MTRR */

/***************************************************************
 *                        driver init / cleanup                *
 ***************************************************************/

static void cleanup(struct intelfb_info *dinfo)
{
      DBG_MSG("cleanup\n");

      if (!dinfo)
            return;

      intelfbhw_disable_irq(dinfo);

      fb_dealloc_cmap(&dinfo->info->cmap);
      kfree(dinfo->info->pixmap.addr);

      if (dinfo->registered)
            unregister_framebuffer(dinfo->info);

      unset_mtrr(dinfo);

      if (dinfo->fbmem_gart && dinfo->gtt_fb_mem) {
            agp_unbind_memory(dinfo->gtt_fb_mem);
            agp_free_memory(dinfo->gtt_fb_mem);
      }
      if (dinfo->gtt_cursor_mem) {
            agp_unbind_memory(dinfo->gtt_cursor_mem);
            agp_free_memory(dinfo->gtt_cursor_mem);
      }
      if (dinfo->gtt_ring_mem) {
            agp_unbind_memory(dinfo->gtt_ring_mem);
            agp_free_memory(dinfo->gtt_ring_mem);
      }

#ifdef CONFIG_FB_INTEL_I2C
      /* un-register I2C bus */
      intelfb_delete_i2c_busses(dinfo);
#endif

      if (dinfo->mmio_base)
            iounmap((void __iomem *)dinfo->mmio_base);
      if (dinfo->aperture.virtual)
            iounmap((void __iomem *)dinfo->aperture.virtual);

      if (dinfo->flag & INTELFB_MMIO_ACQUIRED)
            release_mem_region(dinfo->mmio_base_phys, INTEL_REG_SIZE);
      if (dinfo->flag & INTELFB_FB_ACQUIRED)
            release_mem_region(dinfo->aperture.physical,
                           dinfo->aperture.size);
      framebuffer_release(dinfo->info);
}

#define bailout(dinfo) do {                                 \
      DBG_MSG("bailout\n");                                 \
      cleanup(dinfo);                                       \
      INF_MSG("Not going to register framebuffer, exiting...\n"); \
      return -ENODEV;                                       \
} while (0)


static int __devinit intelfb_pci_register(struct pci_dev *pdev,
                                const struct pci_device_id *ent)
{
      struct fb_info *info;
      struct intelfb_info *dinfo;
      int i, err, dvo;
      int aperture_size, stolen_size;
      struct agp_kern_info gtt_info;
      int agp_memtype;
      const char *s;
      struct agp_bridge_data *bridge;
      int aperture_bar = 0;
      int mmio_bar = 1;
      int offset;

      DBG_MSG("intelfb_pci_register\n");

      num_registered++;
      if (num_registered != 1) {
            ERR_MSG("Attempted to register %d devices "
                  "(should be only 1).\n", num_registered);
            return -ENODEV;
      }

      info = framebuffer_alloc(sizeof(struct intelfb_info), &pdev->dev);
      if (!info) {
            ERR_MSG("Could not allocate memory for intelfb_info.\n");
            return -ENODEV;
      }
      if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
            ERR_MSG("Could not allocate cmap for intelfb_info.\n");
            goto err_out_cmap;
            return -ENODEV;
      }

      dinfo = info->par;
      dinfo->info  = info;
      dinfo->fbops = &intel_fb_ops;
      dinfo->pdev  = pdev;

      /* Reserve pixmap space. */
      info->pixmap.addr = kzalloc(64 * 1024, GFP_KERNEL);
      if (info->pixmap.addr == NULL) {
            ERR_MSG("Cannot reserve pixmap memory.\n");
            goto err_out_pixmap;
      }

      /* set early this option because it could be changed by tv encoder
         driver */
      dinfo->fixed_mode = fixed;

      /* Enable device. */
      if ((err = pci_enable_device(pdev))) {
            ERR_MSG("Cannot enable device.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      /* Set base addresses. */
      if ((ent->device == PCI_DEVICE_ID_INTEL_915G) ||
          (ent->device == PCI_DEVICE_ID_INTEL_915GM) ||
          (ent->device == PCI_DEVICE_ID_INTEL_945G)  ||
          (ent->device == PCI_DEVICE_ID_INTEL_945GM)) {
            aperture_bar = 2;
            mmio_bar = 0;
      }
      dinfo->aperture.physical = pci_resource_start(pdev, aperture_bar);
      dinfo->aperture.size     = pci_resource_len(pdev, aperture_bar);
      dinfo->mmio_base_phys    = pci_resource_start(pdev, mmio_bar);
      DBG_MSG("fb aperture: 0x%llx/0x%llx, MMIO region: 0x%llx/0x%llx\n",
            (unsigned long long)pci_resource_start(pdev, aperture_bar),
            (unsigned long long)pci_resource_len(pdev, aperture_bar),
            (unsigned long long)pci_resource_start(pdev, mmio_bar),
            (unsigned long long)pci_resource_len(pdev, mmio_bar));

      /* Reserve the fb and MMIO regions */
      if (!request_mem_region(dinfo->aperture.physical, dinfo->aperture.size,
                        INTELFB_MODULE_NAME)) {
            ERR_MSG("Cannot reserve FB region.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      dinfo->flag |= INTELFB_FB_ACQUIRED;

      if (!request_mem_region(dinfo->mmio_base_phys,
                        INTEL_REG_SIZE,
                        INTELFB_MODULE_NAME)) {
            ERR_MSG("Cannot reserve MMIO region.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      dinfo->flag |= INTELFB_MMIO_ACQUIRED;

      /* Get the chipset info. */
      dinfo->pci_chipset = pdev->device;

      if (intelfbhw_get_chipset(pdev, dinfo)) {
            cleanup(dinfo);
            return -ENODEV;
      }

      if (intelfbhw_get_memory(pdev, &aperture_size,&stolen_size)) {
            cleanup(dinfo);
            return -ENODEV;
      }

      INF_MSG("%02x:%02x.%d: %s, aperture size %dMB, "
            "stolen memory %dkB\n",
            pdev->bus->number, PCI_SLOT(pdev->devfn),
            PCI_FUNC(pdev->devfn), dinfo->name,
            BtoMB(aperture_size), BtoKB(stolen_size));

      /* Set these from the options. */
      dinfo->accel    = accel;
      dinfo->hwcursor = hwcursor;

      if (NOACCEL_CHIPSET(dinfo) && dinfo->accel == 1) {
            INF_MSG("Acceleration is not supported for the %s chipset.\n",
                  dinfo->name);
            dinfo->accel = 0;
      }

      /* Framebuffer parameters - Use all the stolen memory if >= vram */
      if (ROUND_UP_TO_PAGE(stolen_size) >= MB(vram)) {
            dinfo->fb.size = ROUND_UP_TO_PAGE(stolen_size);
            dinfo->fbmem_gart = 0;
      } else {
            dinfo->fb.size =  MB(vram);
            dinfo->fbmem_gart = 1;
      }

      /* Allocate space for the ring buffer and HW cursor if enabled. */
      if (dinfo->accel) {
            dinfo->ring.size = RINGBUFFER_SIZE;
            dinfo->ring_tail_mask = dinfo->ring.size - 1;
      }
      if (dinfo->hwcursor)
            dinfo->cursor.size = HW_CURSOR_SIZE;

      /* Use agpgart to manage the GATT */
      if (!(bridge = agp_backend_acquire(pdev))) {
            ERR_MSG("cannot acquire agp\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      /* get the current gatt info */
      if (agp_copy_info(bridge, &gtt_info)) {
            ERR_MSG("cannot get agp info\n");
            agp_backend_release(bridge);
            cleanup(dinfo);
            return -ENODEV;
      }

      if (MB(voffset) < stolen_size)
            offset = (stolen_size >> 12);
      else
            offset = ROUND_UP_TO_PAGE(MB(voffset))/GTT_PAGE_SIZE;

      /* set the mem offsets - set them after the already used pages */
      if (dinfo->accel)
            dinfo->ring.offset = offset + gtt_info.current_memory;
      if (dinfo->hwcursor)
            dinfo->cursor.offset = offset +
                  + gtt_info.current_memory + (dinfo->ring.size >> 12);
      if (dinfo->fbmem_gart)
            dinfo->fb.offset = offset +
                  + gtt_info.current_memory + (dinfo->ring.size >> 12)
                  + (dinfo->cursor.size >> 12);

      /* Allocate memories (which aren't stolen) */
      /* Map the fb and MMIO regions */
      /* ioremap only up to the end of used aperture */
      dinfo->aperture.virtual = (u8 __iomem *)ioremap_nocache
            (dinfo->aperture.physical, ((offset + dinfo->fb.offset) << 12)
             + dinfo->fb.size);
      if (!dinfo->aperture.virtual) {
            ERR_MSG("Cannot remap FB region.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      dinfo->mmio_base =
            (u8 __iomem *)ioremap_nocache(dinfo->mmio_base_phys,
                                    INTEL_REG_SIZE);
      if (!dinfo->mmio_base) {
            ERR_MSG("Cannot remap MMIO region.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      if (dinfo->accel) {
            if (!(dinfo->gtt_ring_mem =
                  agp_allocate_memory(bridge, dinfo->ring.size >> 12,
                                AGP_NORMAL_MEMORY))) {
                  ERR_MSG("cannot allocate ring buffer memory\n");
                  agp_backend_release(bridge);
                  cleanup(dinfo);
                  return -ENOMEM;
            }
            if (agp_bind_memory(dinfo->gtt_ring_mem,
                            dinfo->ring.offset)) {
                  ERR_MSG("cannot bind ring buffer memory\n");
                  agp_backend_release(bridge);
                  cleanup(dinfo);
                  return -EBUSY;
            }
            dinfo->ring.physical = dinfo->aperture.physical
                  + (dinfo->ring.offset << 12);
            dinfo->ring.virtual  = dinfo->aperture.virtual
                  + (dinfo->ring.offset << 12);
            dinfo->ring_head = 0;
      }
      if (dinfo->hwcursor) {
            agp_memtype = dinfo->mobile ? AGP_PHYSICAL_MEMORY
                  : AGP_NORMAL_MEMORY;
            if (!(dinfo->gtt_cursor_mem =
                  agp_allocate_memory(bridge, dinfo->cursor.size >> 12,
                                agp_memtype))) {
                  ERR_MSG("cannot allocate cursor memory\n");
                  agp_backend_release(bridge);
                  cleanup(dinfo);
                  return -ENOMEM;
            }
            if (agp_bind_memory(dinfo->gtt_cursor_mem,
                            dinfo->cursor.offset)) {
                  ERR_MSG("cannot bind cursor memory\n");
                  agp_backend_release(bridge);
                  cleanup(dinfo);
                  return -EBUSY;
            }
            if (dinfo->mobile)
                  dinfo->cursor.physical
                        = dinfo->gtt_cursor_mem->physical;
            else
                  dinfo->cursor.physical = dinfo->aperture.physical
                        + (dinfo->cursor.offset << 12);
            dinfo->cursor.virtual = dinfo->aperture.virtual
                  + (dinfo->cursor.offset << 12);
      }
      if (dinfo->fbmem_gart) {
            if (!(dinfo->gtt_fb_mem =
                  agp_allocate_memory(bridge, dinfo->fb.size >> 12,
                                AGP_NORMAL_MEMORY))) {
                  WRN_MSG("cannot allocate framebuffer memory - use "
                        "the stolen one\n");
                  dinfo->fbmem_gart = 0;
            }
            if (agp_bind_memory(dinfo->gtt_fb_mem,
                            dinfo->fb.offset)) {
                  WRN_MSG("cannot bind framebuffer memory - use "
                        "the stolen one\n");
                  dinfo->fbmem_gart = 0;
            }
      }

      /* update framebuffer memory parameters */
      if (!dinfo->fbmem_gart)
            dinfo->fb.offset = 0;   /* starts at offset 0 */
      dinfo->fb.physical = dinfo->aperture.physical
            + (dinfo->fb.offset << 12);
      dinfo->fb.virtual = dinfo->aperture.virtual + (dinfo->fb.offset << 12);
      dinfo->fb_start = dinfo->fb.offset << 12;

      /* release agpgart */
      agp_backend_release(bridge);

      if (mtrr)
            set_mtrr(dinfo);

      DBG_MSG("fb: 0x%x(+ 0x%x)/0x%x (0x%p)\n",
            dinfo->fb.physical, dinfo->fb.offset, dinfo->fb.size,
            dinfo->fb.virtual);
      DBG_MSG("MMIO: 0x%x/0x%x (0x%p)\n",
            dinfo->mmio_base_phys, INTEL_REG_SIZE,
            dinfo->mmio_base);
      DBG_MSG("ring buffer: 0x%x/0x%x (0x%p)\n",
            dinfo->ring.physical, dinfo->ring.size,
            dinfo->ring.virtual);
      DBG_MSG("HW cursor: 0x%x/0x%x (0x%p) (offset 0x%x) (phys 0x%x)\n",
            dinfo->cursor.physical, dinfo->cursor.size,
            dinfo->cursor.virtual, dinfo->cursor.offset,
            dinfo->cursor.physical);

      DBG_MSG("options: vram = %d, accel = %d, hwcursor = %d, fixed = %d, "
            "noinit = %d\n", vram, accel, hwcursor, fixed, noinit);
      DBG_MSG("options: mode = \"%s\"\n", mode ? mode : "");

      if (probeonly)
            bailout(dinfo);

      /*
       * Check if the LVDS port or any DVO ports are enabled.  If so,
       * don't allow mode switching
       */
      dvo = intelfbhw_check_non_crt(dinfo);
      if (dvo) {
            dinfo->fixed_mode = 1;
            WRN_MSG("Non-CRT device is enabled ( ");
            i = 0;
            while (dvo) {
                  if (dvo & 1) {
                        s = intelfbhw_dvo_to_string(1 << i);
                        if (s)
                              printk("%s ", s);
                  }
                  dvo >>= 1;
                  ++i;
            }
            printk(").  Disabling mode switching.\n");
      }

      if (bailearly == 1)
            bailout(dinfo);

      if (FIXED_MODE(dinfo) &&
          screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) {
            ERR_MSG("Video mode must be programmed at boot time.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      if (bailearly == 2)
            bailout(dinfo);

      /* Initialise dinfo and related data. */
      /* If an initial mode was programmed at boot time, get its details. */
      if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
            get_initial_mode(dinfo);

      if (bailearly == 3)
            bailout(dinfo);

      if (FIXED_MODE(dinfo))  /* remap fb address */
            update_dinfo(dinfo, &dinfo->initial_var);

      if (bailearly == 4)
            bailout(dinfo);


      if (intelfb_set_fbinfo(dinfo)) {
            cleanup(dinfo);
            return -ENODEV;
      }

      if (bailearly == 5)
            bailout(dinfo);

#ifdef CONFIG_FB_INTEL_I2C
      /* register I2C bus */
      intelfb_create_i2c_busses(dinfo);
#endif

      if (bailearly == 6)
            bailout(dinfo);

      pci_set_drvdata(pdev, dinfo);

      /* Save the initial register state. */
      i = intelfbhw_read_hw_state(dinfo, &dinfo->save_state,
                            bailearly > 6 ? bailearly - 6 : 0);
      if (i != 0) {
            DBG_MSG("intelfbhw_read_hw_state returned %d\n", i);
            bailout(dinfo);
      }

      intelfbhw_print_hw_state(dinfo, &dinfo->save_state);

      if (bailearly == 18)
            bailout(dinfo);

      /* Cursor initialisation */
      if (dinfo->hwcursor) {
            intelfbhw_cursor_init(dinfo);
            intelfbhw_cursor_reset(dinfo);
      }

      if (bailearly == 19)
            bailout(dinfo);

      /* 2d acceleration init */
      if (dinfo->accel)
            intelfbhw_2d_start(dinfo);

      if (bailearly == 20)
            bailout(dinfo);

      if (noregister)
            bailout(dinfo);

      if (register_framebuffer(dinfo->info) < 0) {
            ERR_MSG("Cannot register framebuffer.\n");
            cleanup(dinfo);
            return -ENODEV;
      }

      dinfo->registered = 1;
      dinfo->open = 0;

      init_waitqueue_head(&dinfo->vsync.wait);
      spin_lock_init(&dinfo->int_lock);
      dinfo->irq_flags = 0;
      dinfo->vsync.pan_display = 0;
      dinfo->vsync.pan_offset = 0;

      return 0;

err_out_pixmap:
      fb_dealloc_cmap(&info->cmap);
err_out_cmap:
      framebuffer_release(info);
      return -ENODEV;
}

static void __devexit
intelfb_pci_unregister(struct pci_dev *pdev)
{
      struct intelfb_info *dinfo = pci_get_drvdata(pdev);

      DBG_MSG("intelfb_pci_unregister\n");

      if (!dinfo)
            return;

      cleanup(dinfo);

      pci_set_drvdata(pdev, NULL);
}

/***************************************************************
 *                       helper functions                      *
 ***************************************************************/

int __inline__ intelfb_var_to_depth(const struct fb_var_screeninfo *var)
{
      DBG_MSG("intelfb_var_to_depth: bpp: %d, green.length is %d\n",
            var->bits_per_pixel, var->green.length);

      switch (var->bits_per_pixel) {
      case 16:
            return (var->green.length == 6) ? 16 : 15;
      case 32:
            return 24;
      default:
            return var->bits_per_pixel;
      }
}


static __inline__ int var_to_refresh(const struct fb_var_screeninfo *var)
{
      int xtot = var->xres + var->left_margin + var->right_margin +
               var->hsync_len;
      int ytot = var->yres + var->upper_margin + var->lower_margin +
               var->vsync_len;

      return (1000000000 / var->pixclock * 1000 + 500) / xtot / ytot;
}

/***************************************************************
 *                Various intialisation functions              *
 ***************************************************************/

static void __devinit get_initial_mode(struct intelfb_info *dinfo)
{
      struct fb_var_screeninfo *var;
      int xtot, ytot;

      DBG_MSG("get_initial_mode\n");

      dinfo->initial_vga = 1;
      dinfo->initial_fb_base = screen_info.lfb_base;
      dinfo->initial_video_ram = screen_info.lfb_size * KB(64);
      dinfo->initial_pitch = screen_info.lfb_linelength;

      var = &dinfo->initial_var;
      memset(var, 0, sizeof(*var));
      var->xres = screen_info.lfb_width;
      var->yres = screen_info.lfb_height;
      var->bits_per_pixel = screen_info.lfb_depth;
      switch (screen_info.lfb_depth) {
      case 15:
            var->bits_per_pixel = 16;
            break;
      case 24:
            var->bits_per_pixel = 32;
            break;
      }

      DBG_MSG("Initial info: FB is 0x%x/0x%x (%d kByte)\n",
            dinfo->initial_fb_base, dinfo->initial_video_ram,
            BtoKB(dinfo->initial_video_ram));

      DBG_MSG("Initial info: mode is %dx%d-%d (%d)\n",
            var->xres, var->yres, var->bits_per_pixel,
            dinfo->initial_pitch);

      /* Dummy timing values (assume 60Hz) */
      var->left_margin = (var->xres / 8) & 0xf8;
      var->right_margin = 32;
      var->upper_margin = 16;
      var->lower_margin = 4;
      var->hsync_len = (var->xres / 8) & 0xf8;
      var->vsync_len = 4;

      xtot = var->xres + var->left_margin +
            var->right_margin + var->hsync_len;
      ytot = var->yres + var->upper_margin +
            var->lower_margin + var->vsync_len;
      var->pixclock = 10000000 / xtot * 1000 / ytot * 100 / 60;

      var->height = -1;
      var->width = -1;

      if (var->bits_per_pixel > 8) {
            var->red.offset = screen_info.red_pos;
            var->red.length = screen_info.red_size;
            var->green.offset = screen_info.green_pos;
            var->green.length = screen_info.green_size;
            var->blue.offset = screen_info.blue_pos;
            var->blue.length = screen_info.blue_size;
            var->transp.offset = screen_info.rsvd_pos;
            var->transp.length = screen_info.rsvd_size;
      } else {
            var->red.length = 8;
            var->green.length = 8;
            var->blue.length = 8;
      }
}

static int __devinit intelfb_init_var(struct intelfb_info *dinfo)
{
      struct fb_var_screeninfo *var;
      int msrc = 0;

      DBG_MSG("intelfb_init_var\n");

      var = &dinfo->info->var;
      if (FIXED_MODE(dinfo)) {
              memcpy(var, &dinfo->initial_var,
                   sizeof(struct fb_var_screeninfo));
            msrc = 5;
      } else {
            const u8 *edid_s = fb_firmware_edid(&dinfo->pdev->dev);
            u8 *edid_d = NULL;

            if (edid_s) {
                  edid_d = kmemdup(edid_s, EDID_LENGTH, GFP_KERNEL);

                  if (edid_d) {
                        fb_edid_to_monspecs(edid_d,
                                        &dinfo->info->monspecs);
                        kfree(edid_d);
                  }
            }

            if (mode) {
                  printk("intelfb: Looking for mode in private "
                         "database\n");
                  msrc = fb_find_mode(var, dinfo->info, mode,
                                  dinfo->info->monspecs.modedb,
                                  dinfo->info->monspecs.modedb_len,
                                  NULL, 0);

                  if (msrc && msrc > 1) {
                        printk("intelfb: No mode in private database, "
                               "intelfb: looking for mode in global "
                               "database ");
                        msrc = fb_find_mode(var, dinfo->info, mode,
                                        NULL, 0, NULL, 0);

                        if (msrc)
                              msrc |= 8;
                  }

            }

            if (!msrc)
                  msrc = fb_find_mode(var, dinfo->info, PREFERRED_MODE,
                                  NULL, 0, NULL, 0);
      }

      if (!msrc) {
            ERR_MSG("Cannot find a suitable video mode.\n");
            return 1;
      }

      INF_MSG("Initial video mode is %dx%d-%d@%d.\n", var->xres, var->yres,
            var->bits_per_pixel, var_to_refresh(var));

      DBG_MSG("Initial video mode is from %d.\n", msrc);

#if ALLOCATE_FOR_PANNING
      /* Allow use of half of the video ram for panning */
      var->xres_virtual = var->xres;
      var->yres_virtual =
            dinfo->fb.size / 2 / (var->bits_per_pixel * var->xres);
      if (var->yres_virtual < var->yres)
            var->yres_virtual = var->yres;
#else
      var->yres_virtual = var->yres;
#endif

      if (dinfo->accel)
            var->accel_flags |= FB_ACCELF_TEXT;
      else
            var->accel_flags &= ~FB_ACCELF_TEXT;

      return 0;
}

static int __devinit intelfb_set_fbinfo(struct intelfb_info *dinfo)
{
      struct fb_info *info = dinfo->info;

      DBG_MSG("intelfb_set_fbinfo\n");

      info->flags = FBINFO_FLAG_DEFAULT;
      info->fbops = &intel_fb_ops;
      info->pseudo_palette = dinfo->pseudo_palette;

      info->pixmap.size = 64*1024;
      info->pixmap.buf_align = 8;
      info->pixmap.access_align = 32;
      info->pixmap.flags = FB_PIXMAP_SYSTEM;

      if (intelfb_init_var(dinfo))
            return 1;

      info->pixmap.scan_align = 1;
      strcpy(info->fix.id, dinfo->name);
      info->fix.smem_start = dinfo->fb.physical;
      info->fix.smem_len = dinfo->fb.size;
      info->fix.type = FB_TYPE_PACKED_PIXELS;
      info->fix.type_aux = 0;
      info->fix.xpanstep = 8;
      info->fix.ypanstep = 1;
      info->fix.ywrapstep = 0;
      info->fix.mmio_start = dinfo->mmio_base_phys;
      info->fix.mmio_len = INTEL_REG_SIZE;
      info->fix.accel = FB_ACCEL_I830;
      update_dinfo(dinfo, &info->var);

      return 0;
}

/* Update dinfo to match the active video mode. */
static void update_dinfo(struct intelfb_info *dinfo,
                   struct fb_var_screeninfo *var)
{
      DBG_MSG("update_dinfo\n");

      dinfo->bpp = var->bits_per_pixel;
      dinfo->depth = intelfb_var_to_depth(var);
      dinfo->xres = var->xres;
      dinfo->yres = var->xres;
      dinfo->pixclock = var->pixclock;

      dinfo->info->fix.visual = dinfo->visual;
      dinfo->info->fix.line_length = dinfo->pitch;

      switch (dinfo->bpp) {
      case 8:
            dinfo->visual = FB_VISUAL_PSEUDOCOLOR;
            dinfo->pitch = var->xres_virtual;
            break;
      case 16:
            dinfo->visual = FB_VISUAL_TRUECOLOR;
            dinfo->pitch = var->xres_virtual * 2;
            break;
      case 32:
            dinfo->visual = FB_VISUAL_TRUECOLOR;
            dinfo->pitch = var->xres_virtual * 4;
            break;
      }

      /* Make sure the line length is a aligned correctly. */
      if (IS_I9XX(dinfo))
            dinfo->pitch = ROUND_UP_TO(dinfo->pitch, STRIDE_ALIGNMENT_I9XX);
      else
            dinfo->pitch = ROUND_UP_TO(dinfo->pitch, STRIDE_ALIGNMENT);

      if (FIXED_MODE(dinfo))
            dinfo->pitch = dinfo->initial_pitch;

      dinfo->info->screen_base = (char __iomem *)dinfo->fb.virtual;
      dinfo->info->fix.line_length = dinfo->pitch;
      dinfo->info->fix.visual = dinfo->visual;
}

/* fbops functions */

/***************************************************************
 *                       fbdev interface                       *
 ***************************************************************/

static int intelfb_open(struct fb_info *info, int user)
{
      struct intelfb_info *dinfo = GET_DINFO(info);

      if (user)
            dinfo->open++;

      return 0;
}

static int intelfb_release(struct fb_info *info, int user)
{
      struct intelfb_info *dinfo = GET_DINFO(info);

      if (user) {
            dinfo->open--;
            msleep(1);
            if (!dinfo->open)
                  intelfbhw_disable_irq(dinfo);
      }

      return 0;
}

static int intelfb_check_var(struct fb_var_screeninfo *var,
                       struct fb_info *info)
{
      int change_var = 0;
      struct fb_var_screeninfo v;
      struct intelfb_info *dinfo;
      static int first = 1;
      int i;
      /* Good pitches to allow tiling.  Don't care about pitches < 1024. */
      static const int pitches[] = {
            128 * 8,
            128 * 16,
            128 * 32,
            128 * 64,
            0
      };

      DBG_MSG("intelfb_check_var: accel_flags is %d\n", var->accel_flags);

      dinfo = GET_DINFO(info);

      /* update the pitch */
      if (intelfbhw_validate_mode(dinfo, var) != 0)
            return -EINVAL;

      v = *var;

      for (i = 0; pitches[i] != 0; i++) {
            if (pitches[i] >= v.xres_virtual) {
                  v.xres_virtual = pitches[i];
                  break;
            }
      }

      /* Check for a supported bpp. */
      if (v.bits_per_pixel <= 8)
            v.bits_per_pixel = 8;
      else if (v.bits_per_pixel <= 16) {
            if (v.bits_per_pixel == 16)
                  v.green.length = 6;
            v.bits_per_pixel = 16;
      } else if (v.bits_per_pixel <= 32)
            v.bits_per_pixel = 32;
      else
            return -EINVAL;

      change_var = ((info->var.xres != var->xres) ||
                  (info->var.yres != var->yres) ||
                  (info->var.xres_virtual != var->xres_virtual) ||
                  (info->var.yres_virtual != var->yres_virtual) ||
                  (info->var.bits_per_pixel != var->bits_per_pixel) ||
                  memcmp(&info->var.red, &var->red, sizeof(var->red)) ||
                  memcmp(&info->var.green, &var->green,
                       sizeof(var->green)) ||
                  memcmp(&info->var.blue, &var->blue, sizeof(var->blue)));

      if (FIXED_MODE(dinfo) &&
          (change_var ||
           var->yres_virtual > dinfo->initial_var.yres_virtual ||
           var->yres_virtual < dinfo->initial_var.yres ||
           var->xoffset || var->nonstd)) {
            if (first) {
                  ERR_MSG("Changing the video mode is not supported.\n");
                  first = 0;
            }
            return -EINVAL;
      }

      switch (intelfb_var_to_depth(&v)) {
      case 8:
            v.red.offset = v.green.offset = v.blue.offset = 0;
            v.red.length = v.green.length = v.blue.length = 8;
            v.transp.offset = v.transp.length = 0;
            break;
      case 15:
            v.red.offset = 10;
            v.green.offset = 5;
            v.blue.offset = 0;
            v.red.length = v.green.length = v.blue.length = 5;
            v.transp.offset = v.transp.length = 0;
            break;
      case 16:
            v.red.offset = 11;
            v.green.offset = 5;
            v.blue.offset = 0;
            v.red.length = 5;
            v.green.length = 6;
            v.blue.length = 5;
            v.transp.offset = v.transp.length = 0;
            break;
      case 24:
            v.red.offset = 16;
            v.green.offset = 8;
            v.blue.offset = 0;
            v.red.length = v.green.length = v.blue.length = 8;
            v.transp.offset = v.transp.length = 0;
            break;
      case 32:
            v.red.offset = 16;
            v.green.offset = 8;
            v.blue.offset = 0;
            v.red.length = v.green.length = v.blue.length = 8;
            v.transp.offset = 24;
            v.transp.length = 8;
            break;
      }

      if (v.xoffset < 0)
            v.xoffset = 0;
      if (v.yoffset < 0)
            v.yoffset = 0;

      if (v.xoffset > v.xres_virtual - v.xres)
            v.xoffset = v.xres_virtual - v.xres;
      if (v.yoffset > v.yres_virtual - v.yres)
            v.yoffset = v.yres_virtual - v.yres;

      v.red.msb_right = v.green.msb_right = v.blue.msb_right =
                    v.transp.msb_right = 0;

        *var = v;

      return 0;
}

static int intelfb_set_par(struct fb_info *info)
{
      struct intelfb_hwstate *hw;
        struct intelfb_info *dinfo = GET_DINFO(info);

      if (FIXED_MODE(dinfo)) {
            ERR_MSG("Changing the video mode is not supported.\n");
            return -EINVAL;
      }

      hw = kmalloc(sizeof(*hw), GFP_ATOMIC);
      if (!hw)
            return -ENOMEM;

      DBG_MSG("intelfb_set_par (%dx%d-%d)\n", info->var.xres,
            info->var.yres, info->var.bits_per_pixel);

      intelfb_blank(FB_BLANK_POWERDOWN, info);

      if (ACCEL(dinfo, info))
            intelfbhw_2d_stop(dinfo);

      memcpy(hw, &dinfo->save_state, sizeof(*hw));
      if (intelfbhw_mode_to_hw(dinfo, hw, &info->var))
            goto invalid_mode;
      if (intelfbhw_program_mode(dinfo, hw, 0))
            goto invalid_mode;

#if REGDUMP > 0
      intelfbhw_read_hw_state(dinfo, hw, 0);
      intelfbhw_print_hw_state(dinfo, hw);
#endif

      update_dinfo(dinfo, &info->var);

      if (ACCEL(dinfo, info))
            intelfbhw_2d_start(dinfo);

      intelfb_pan_display(&info->var, info);

      intelfb_blank(FB_BLANK_UNBLANK, info);

      if (ACCEL(dinfo, info)) {
            info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
            FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
            FBINFO_HWACCEL_IMAGEBLIT;
      } else
            info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;

      kfree(hw);
      return 0;
invalid_mode:
      kfree(hw);
      return -EINVAL;
}

static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
                       unsigned blue, unsigned transp,
                       struct fb_info *info)
{
      struct intelfb_info *dinfo = GET_DINFO(info);

#if VERBOSE > 0
      DBG_MSG("intelfb_setcolreg: regno %d, depth %d\n", regno, dinfo->depth);
#endif

      if (regno > 255)
            return 1;

      if (dinfo->depth == 8) {
            red >>= 8;
            green >>= 8;
            blue >>= 8;

            intelfbhw_setcolreg(dinfo, regno, red, green, blue,
                            transp);
      }

      if (regno < 16) {
            switch (dinfo->depth) {
            case 15:
                  dinfo->pseudo_palette[regno] = ((red & 0xf800) >>  1) |
                        ((green & 0xf800) >>  6) |
                        ((blue & 0xf800) >> 11);
                  break;
            case 16:
                  dinfo->pseudo_palette[regno] = (red & 0xf800) |
                        ((green & 0xfc00) >>  5) |
                        ((blue  & 0xf800) >> 11);
                  break;
            case 24:
                  dinfo->pseudo_palette[regno] = ((red & 0xff00) << 8) |
                        (green & 0xff00) |
                        ((blue  & 0xff00) >> 8);
                  break;
            }
      }

      return 0;
}

static int intelfb_blank(int blank, struct fb_info *info)
{
      intelfbhw_do_blank(blank, info);
      return 0;
}

static int intelfb_pan_display(struct fb_var_screeninfo *var,
                         struct fb_info *info)
{
      intelfbhw_pan_display(var, info);
      return 0;
}

/* When/if we have our own ioctls. */
static int intelfb_ioctl(struct fb_info *info, unsigned int cmd,
                   unsigned long arg)
{
      int retval = 0;
      struct intelfb_info *dinfo = GET_DINFO(info);
      u32 pipe = 0;

      switch (cmd) {
            case FBIO_WAITFORVSYNC:
                  if (get_user(pipe, (__u32 __user *)arg))
                        return -EFAULT;

                  retval = intelfbhw_wait_for_vsync(dinfo, pipe);
                  break;
            default:
                  break;
      }

      return retval;
}

static void intelfb_fillrect (struct fb_info *info,
                        const struct fb_fillrect *rect)
{
        struct intelfb_info *dinfo = GET_DINFO(info);
      u32 rop, color;

#if VERBOSE > 0
      DBG_MSG("intelfb_fillrect\n");
#endif

      if (!ACCEL(dinfo, info) || dinfo->depth == 4)
            return cfb_fillrect(info, rect);

      if (rect->rop == ROP_COPY)
            rop = PAT_ROP_GXCOPY;
      else /* ROP_XOR */
            rop = PAT_ROP_GXXOR;

      if (dinfo->depth != 8)
            color = dinfo->pseudo_palette[rect->color];
      else
            color = rect->color;

      intelfbhw_do_fillrect(dinfo, rect->dx, rect->dy,
                        rect->width, rect->height, color,
                        dinfo->pitch, info->var.bits_per_pixel,
                        rop);
}

static void intelfb_copyarea(struct fb_info *info,
                       const struct fb_copyarea *region)
{
        struct intelfb_info *dinfo = GET_DINFO(info);

#if VERBOSE > 0
      DBG_MSG("intelfb_copyarea\n");
#endif

      if (!ACCEL(dinfo, info) || dinfo->depth == 4)
            return cfb_copyarea(info, region);

      intelfbhw_do_bitblt(dinfo, region->sx, region->sy, region->dx,
                      region->dy, region->width, region->height,
                      dinfo->pitch, info->var.bits_per_pixel);
}

static void intelfb_imageblit(struct fb_info *info,
                        const struct fb_image *image)
{
        struct intelfb_info *dinfo = GET_DINFO(info);
      u32 fgcolor, bgcolor;

#if VERBOSE > 0
      DBG_MSG("intelfb_imageblit\n");
#endif

      if (!ACCEL(dinfo, info) || dinfo->depth == 4
          || image->depth != 1)
            return cfb_imageblit(info, image);

      if (dinfo->depth != 8) {
            fgcolor = dinfo->pseudo_palette[image->fg_color];
            bgcolor = dinfo->pseudo_palette[image->bg_color];
      } else {
            fgcolor = image->fg_color;
            bgcolor = image->bg_color;
      }

      if (!intelfbhw_do_drawglyph(dinfo, fgcolor, bgcolor, image->width,
                            image->height, image->data,
                            image->dx, image->dy,
                            dinfo->pitch, info->var.bits_per_pixel))
            return cfb_imageblit(info, image);
}

static int intelfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
        struct intelfb_info *dinfo = GET_DINFO(info);
      u32 physical;
#if VERBOSE > 0
      DBG_MSG("intelfb_cursor\n");
#endif

      if (!dinfo->hwcursor)
            return -ENODEV;

      intelfbhw_cursor_hide(dinfo);

      /* If XFree killed the cursor - restore it */
      physical = (dinfo->mobile || IS_I9XX(dinfo)) ? dinfo->cursor.physical :
               (dinfo->cursor.offset << 12);

      if (INREG(CURSOR_A_BASEADDR) != physical) {
            u32 fg, bg;

            DBG_MSG("the cursor was killed - restore it !!\n");
            DBG_MSG("size %d, %d   pos %d, %d\n",
                  cursor->image.width, cursor->image.height,
                  cursor->image.dx, cursor->image.dy);

            intelfbhw_cursor_init(dinfo);
            intelfbhw_cursor_reset(dinfo);
            intelfbhw_cursor_setpos(dinfo, cursor->image.dx,
                              cursor->image.dy);

            if (dinfo->depth != 8) {
                  fg =dinfo->pseudo_palette[cursor->image.fg_color];
                  bg =dinfo->pseudo_palette[cursor->image.bg_color];
            } else {
                  fg = cursor->image.fg_color;
                  bg = cursor->image.bg_color;
            }
            intelfbhw_cursor_setcolor(dinfo, bg, fg);
            intelfbhw_cursor_load(dinfo, cursor->image.width,
                              cursor->image.height,
                              dinfo->cursor_src);

            if (cursor->enable)
                  intelfbhw_cursor_show(dinfo);
            return 0;
      }

      if (cursor->set & FB_CUR_SETPOS) {
            u32 dx, dy;

            dx = cursor->image.dx - info->var.xoffset;
            dy = cursor->image.dy - info->var.yoffset;

            intelfbhw_cursor_setpos(dinfo, dx, dy);
      }

      if (cursor->set & FB_CUR_SETSIZE) {
            if (cursor->image.width > 64 || cursor->image.height > 64)
                  return -ENXIO;

            intelfbhw_cursor_reset(dinfo);
      }

      if (cursor->set & FB_CUR_SETCMAP) {
            u32 fg, bg;

            if (dinfo->depth != 8) {
                  fg = dinfo->pseudo_palette[cursor->image.fg_color];
                  bg = dinfo->pseudo_palette[cursor->image.bg_color];
            } else {
                  fg = cursor->image.fg_color;
                  bg = cursor->image.bg_color;
            }

            intelfbhw_cursor_setcolor(dinfo, bg, fg);
      }

      if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
            u32 s_pitch = (ROUND_UP_TO(cursor->image.width, 8) / 8);
            u32 size = s_pitch * cursor->image.height;
            u8 *dat = (u8 *) cursor->image.data;
            u8 *msk = (u8 *) cursor->mask;
            u8 src[64];
            u32 i;

            if (cursor->image.depth != 1)
                  return -ENXIO;

            switch (cursor->rop) {
            case ROP_XOR:
                  for (i = 0; i < size; i++)
                        src[i] = dat[i] ^ msk[i];
                  break;
            case ROP_COPY:
            default:
                  for (i = 0; i < size; i++)
                        src[i] = dat[i] & msk[i];
                  break;
            }

            /* save the bitmap to restore it when XFree will
               make the cursor dirty */
            memcpy(dinfo->cursor_src, src, size);

            intelfbhw_cursor_load(dinfo, cursor->image.width,
                              cursor->image.height, src);
      }

      if (cursor->enable)
            intelfbhw_cursor_show(dinfo);

      return 0;
}

static int intelfb_sync(struct fb_info *info)
{
        struct intelfb_info *dinfo = GET_DINFO(info);

#if VERBOSE > 0
      DBG_MSG("intelfb_sync\n");
#endif

      if (dinfo->ring_lockup)
            return 0;

      intelfbhw_do_sync(dinfo);
      return 0;
}


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