i830_driver.c

是由intel提供的针对intel显卡915以上系列的linux驱动

/* This is needed for SetDisplayDevices to work correctly on I915G.
 * Enable for all chipsets now as it has no bad side effects, apart
 * from slightly longer startup time.
 */
#define I915G_WORKAROUND

static Bool
SetDisplayDevices(ScrnInfoPtr pScrn, int devices)
{
   I830Ptr pI830 = I830PTR(pScrn);
   vbeInfoPtr pVbe = pI830->pVbe;
   CARD32 temp;
   int singlepipe = 0;
#ifdef I915G_WORKAROUND
   int getmode1;
   Bool setmode = FALSE;
#endif

   DPRINTF(PFX, "SetDisplayDevices: devices 0x%x\n", devices);

   if (!pI830->specifiedMonitor)
      return TRUE;

#ifdef I915G_WORKAROUND
   if (pI830->preinit)
      setmode = TRUE;
   if (pI830->leaving)
      setmode = FALSE;
   if (pI830->closing)
      setmode = FALSE;

   if (setmode) {
      VBEGetVBEMode(pVbe, &getmode1);
      I830Set640x480(pScrn);
   }
#endif

   pVbe->pInt10->num = 0x10;
   pVbe->pInt10->ax = 0x5f64;
   pVbe->pInt10->bx = 0x1;
   pVbe->pInt10->cx = devices;

   xf86ExecX86int10_wrapper(pVbe->pInt10, pScrn);
   if (Check5fStatus(pScrn, 0x5f64, pVbe->pInt10->ax)) {
#ifdef I915G_WORKAROUND
      if (setmode) {
  	 VBESetVBEMode(pI830->pVbe, getmode1 | 1<<15, NULL);
      }
#endif
      pI830->pipeEnabled[0] = (devices & 0xff) ? TRUE : FALSE;
      pI830->pipeEnabled[1] = (devices & 0xff00) ? TRUE : FALSE;

      return TRUE;
   }

#ifdef I915G_WORKAROUND
   if (setmode)
      VBESetVBEMode(pI830->pVbe, getmode1 | 1<<15, NULL);
#endif

   if (devices & 0xff) {
      pVbe->pInt10->num = 0x10;
      pVbe->pInt10->ax = 0x5f64;
      pVbe->pInt10->bx = 0x1;
      pVbe->pInt10->cx = devices & 0xff;

      xf86ExecX86int10_wrapper(pVbe->pInt10, pScrn);
      if (Check5fStatus(pScrn, 0x5f64, pVbe->pInt10->ax)) {
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Successfully set display devices to 0x%x.\n",devices & 0xff);
         singlepipe = devices & 0xff00; /* set alternate */
      } else {
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Failed to set display devices to 0x%x.\n",devices & 0xff);
         singlepipe = devices;
      }
   } else
      singlepipe = devices; 

   if (singlepipe == devices && devices & 0xff00) {
      pVbe->pInt10->num = 0x10;
      pVbe->pInt10->ax = 0x5f64;
      pVbe->pInt10->bx = 0x1;
      pVbe->pInt10->cx = devices & 0xff00;

      xf86ExecX86int10_wrapper(pVbe->pInt10, pScrn);
      if (Check5fStatus(pScrn, 0x5f64, pVbe->pInt10->ax)) {
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Successfully set display devices to 0x%x.\n",devices & 0xff00);
         singlepipe = devices & 0xff; /* set alternate */
      } else {
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Failed to set display devices to 0x%x.\n",devices & 0xff00);
         singlepipe = devices;
      }
   } 

   /* LVDS doesn't exist on these */
   if (IS_I830(pI830) || IS_845G(pI830) || IS_I865G(pI830))
      singlepipe &= ~(PIPE_LFP | (PIPE_LFP<<8));

   if (pI830->availablePipes == 1) 
      singlepipe &= 0xFF;

   /* Disable LVDS */
   if (singlepipe & PIPE_LFP)  {
      /* LFP on PipeA is unlikely! */
      OUTREG(0x61200, INREG(0x61200) & ~0x80000000);
      OUTREG(0x61204, INREG(0x61204) & ~0x00000001);
      while ((INREG(0x61200) & 0x80000000) || (INREG(0x61204) & 1));
      /* Fix up LVDS */
      OUTREG(LVDS, (INREG(LVDS) & ~1<<30) | 0x80000300);
      /* Enable LVDS */
      OUTREG(0x61200, INREG(0x61200) | 0x80000000);
      OUTREG(0x61204, INREG(0x61204) | 0x00000001);
      while (!(INREG(0x61200) & 0x80000000) && !(INREG(0x61204) & 1));
      xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Enabling LVDS directly. Pipe A.\n");
   } else
   if (singlepipe & (PIPE_LFP << 8))  {
      OUTREG(0x61200, INREG(0x61200) & ~0x80000000);
      OUTREG(0x61204, INREG(0x61204) & ~0x00000001);
      while ((INREG(0x61200) & 0x80000000) || (INREG(0x61204) & 1));
      /* Fix up LVDS */
      OUTREG(LVDS, (INREG(LVDS) | 1<<30) | 0x80000300);
      /* Enable LVDS */
      OUTREG(0x61200, INREG(0x61200) | 0x80000000);
      OUTREG(0x61204, INREG(0x61204) | 0x00000001);
      while (!(INREG(0x61200) & 0x80000000) && !(INREG(0x61204) & 1));
      xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Enabling LVDS directly. Pipe B.\n");
   }
   else if (!(IS_I830(pI830) || IS_845G(pI830) || IS_I865G(pI830))) {
      if (!(devices & (PIPE_LFP | PIPE_LFP<<8))) {
         OUTREG(0x61200, INREG(0x61200) & ~0x80000000);
         OUTREG(0x61204, INREG(0x61204) & ~0x00000001);
         while ((INREG(0x61200) & 0x80000000) || (INREG(0x61204) & 1));
         /* Fix up LVDS */
         OUTREG(LVDS, (INREG(LVDS) | 1<<30) & ~0x80000300);
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Disabling LVDS directly.\n");
      }
   }

   /* Now try to program the registers directly if the BIOS failed. */
   temp = INREG(ADPA);
   temp &= ~(ADPA_DAC_ENABLE | ADPA_PIPE_SELECT_MASK);
   temp &= ~(ADPA_VSYNC_CNTL_DISABLE | ADPA_HSYNC_CNTL_DISABLE);
   /* Turn on ADPA */
   if (singlepipe & PIPE_CRT)  {
      xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Enabling ADPA directly. Pipe A.\n");
      temp |= ADPA_DAC_ENABLE | ADPA_PIPE_A_SELECT;
      OUTREG(ADPA, temp);
   } else
   if (singlepipe & (PIPE_CRT << 8)) {
      xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Enabling ADPA directly. Pipe B.\n");
      temp |= ADPA_DAC_ENABLE | ADPA_PIPE_B_SELECT;
      OUTREG(ADPA, temp);
   } 
   else {
      if (!(devices & (PIPE_CRT | PIPE_CRT<<8))) {
         xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
	 	"Disabling ADPA directly.\n");
         temp |= ADPA_VSYNC_CNTL_DISABLE | ADPA_HSYNC_CNTL_DISABLE;
         OUTREG(ADPA, temp);
      }
   }

   xf86DrvMsg(pScrn->scrnIndex, X_WARNING,"Writing config directly to SWF0.\n");
   temp = INREG(SWF0);
   OUTREG(SWF0, (temp & ~(0xffff)) | (devices & 0xffff));

   if (GetDisplayDevices(pScrn) != devices) {
      xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
		 "SetDisplayDevices failed with devices 0x%x instead of 0x%x\n",
	         GetDisplayDevices(pScrn), devices);
      return FALSE;
   }

   pI830->pipeEnabled[0] = (devices & 0xff) ? TRUE : FALSE;
   pI830->pipeEnabled[1] = (devices & 0xff00) ? TRUE : FALSE;

   return TRUE;
}

static Bool
GetBIOSVersion(ScrnInfoPtr pScrn, unsigned int *version)
{
   vbeInfoPtr pVbe = I830PTR(pScrn)->pVbe;

   DPRINTF(PFX, "GetBIOSVersion\n");

   pVbe->pInt10->num = 0x10;
   pVbe->pInt10->ax = 0x5f01;

   xf86ExecX86int10_wrapper(pVbe->pInt10, pScrn);
   if (Check5fStatus(pScrn, 0x5f01, pVbe->pInt10->ax)) {
      *version = pVbe->pInt10->bx;
      return TRUE;
   }

   *version = 0;
   return FALSE;
}

static Bool
GetDevicePresence(ScrnInfoPtr pScrn, Bool *required, int *attached,
		  int *encoderPresent)
{
   vbeInfoPtr pVbe = I830PTR(pScrn)->pVbe;

   DPRINTF(PFX, "GetDevicePresence\n");

   pVbe->pInt10->num = 0x10;
   pVbe->pInt10->ax = 0x5f64;
   pVbe->pInt10->bx = 0x200;

   xf86ExecX86int10_wrapper(pVbe->pInt10, pScrn);
   if (Check5fStatus(pScrn, 0x5f64, pVbe->pInt10->ax)) {
      if (required)
	 *required = ((pVbe->pInt10->bx & 0x1) == 0);
      if (attached)
	 *attached = (pVbe->pInt10->cx >> 8) & 0xff;
      if (encoderPresent)
	 *encoderPresent = pVbe->pInt10->cx & 0xff;
      return TRUE;
   } else
      return FALSE;
}

static Bool
GetDisplayInfo(ScrnInfoPtr pScrn, int device, Bool *attached, Bool *present,
	       short *x, short *y)
{
   vbeInfoPtr pVbe = I830PTR(pScrn)->pVbe;

   DPRINTF(PFX, "GetDisplayInfo: device: 0x%x\n", device);

   switch (device & 0xff) {
   case 0x01:
   case 0x02:
   case 0x04:
   case 0x08:
   case 0x10:
   case 0x20:
      break;
   default:
      xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
		 "GetDisplayInfo: invalid device: 0x%x\n", device & 0xff);
      return FALSE;
   }

   pVbe->pInt10->num = 0x10;
   pVbe->pInt10->ax = 0x5f64;
   pVbe->pInt10->bx = 0x300;
   pVbe->pInt10->cx = device & 0xff;

   xf86ExecX86int10_wrapper(pVbe->pInt10, pScrn);
   if (Check5fStatus(pScrn, 0x5f64, pVbe->pInt10->ax)) {
      if (attached)
	 *attached = ((pVbe->pInt10->bx & 0x2) != 0);
      if (present)
	 *present = ((pVbe->pInt10->bx & 0x1) != 0);
      if (pVbe->pInt10->cx != (device & 0xff)) {
	 if (y) {
	    *y = pVbe->pInt10->cx & 0xffff;
	 }
	 if (x) {
	    *x = (pVbe->pInt10->cx >> 16) & 0xffff;
	 }
      }
      return TRUE;
   } else
      return FALSE;
}

/*
 * Returns a string matching the device corresponding to the first bit set
 * in "device".  savedDevice is then set to device with that bit cleared.
 * Subsequent calls with device == -1 will use savedDevice.
 */

static const char *displayDevices[] = {
   "CRT",
   "TV",
   "DFP (digital flat panel)",
   "LFP (local flat panel)",
   "CRT2 (second CRT)",
   "TV2 (second TV)",
   "DFP2 (second digital flat panel)",
   "LFP2 (second local flat panel)",
   NULL
};

static const char *
DeviceToString(int device)
{
   static int savedDevice = -1;
   int bit = 0;
   const char *name;

   if (device == -1) {
      device = savedDevice;
      bit = 0;
   }

   if (device == -1)
      return NULL;

   while (displayDevices[bit]) {
      if (device & (1 << bit)) {
	 name = displayDevices[bit];
	 savedDevice = device & ~(1 << bit);
	 bit++;
	 return name;
      }
      bit++;
   }
   return NULL;
}

static void
PrintDisplayDeviceInfo(ScrnInfoPtr pScrn)
{
   I830Ptr pI830 = I830PTR(pScrn);
   int pipe, n;
   int displays;

   DPRINTF(PFX, "PrintDisplayDeviceInfo\n");

   displays = pI830->operatingDevices;
   if (displays == -1) {
      xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		 "No active display devices.\n");
      return;
   }

   /* Check for active devices connected to each display pipe. */
   for (n = 0; n < pI830->availablePipes; n++) {
      pipe = ((displays >> PIPE_SHIFT(n)) & PIPE_ACTIVE_MASK);
      if (pipe) {
	 const char *name;

	 xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		    "Currently active displays on Pipe %c:\n", PIPE_NAME(n));
	 name = DeviceToString(pipe);
	 do {
	    xf86DrvMsg(pScrn->scrnIndex, X_INFO, "\t%s\n", name);
	    name = DeviceToString(-1);
	 } while (name);

	 if (pipe & PIPE_UNKNOWN_ACTIVE)
	    xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		       "\tSome unknown display devices may also be present\n");

      } else {
	 xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		    "No active displays on Pipe %c.\n", PIPE_NAME(n));
      }

      if (pI830->pipeDisplaySize[n].x2 != 0) {
	 xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		    "Lowest common panel size for pipe %c is %d x %d\n",
		    PIPE_NAME(n), pI830->pipeDisplaySize[n].x2,
		    pI830->pipeDisplaySize[n].y2);
      } else if (pI830->pipeEnabled[n] && pipe & ~PIPE_CRT_ACTIVE) {
	 xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		    "No display size information available for pipe %c.\n",
		    PIPE_NAME(n));
      }
   }
}

static void
GetPipeSizes(ScrnInfoPtr pScrn)
{
   I830Ptr pI830 = I830PTR(pScrn);
   int pipe, n;
   DisplayType i;

   DPRINTF(PFX, "GetPipeSizes\n");


   for (n = 0; n < pI830->availablePipes; n++) {
      pipe = (pI830->operatingDevices >> PIPE_SHIFT(n)) & PIPE_ACTIVE_MASK;
      pI830->pipeDisplaySize[n].x1 = pI830->pipeDisplaySize[n].y1 = 0;
      pI830->pipeDisplaySize[n].x2 = pI830->pipeDisplaySize[n].y2 = 4096;
      for (i = 0; i < NumKnownDisplayTypes; i++) {
         if (pipe & (1 << i) & PIPE_SIZED_DISP_MASK) {
	    if (pI830->displaySize[i].x2 != 0) {
	       xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		          "Size of device %s is %d x %d\n",
		          displayDevices[i],
		          pI830->displaySize[i].x2,
		          pI830->displaySize[i].y2);
	       if (pI830->displaySize[i].x2 < pI830->pipeDisplaySize[n].x2)
	          pI830->pipeDisplaySize[n].x2 = pI830->displaySize[i].x2;
	       if (pI830->displaySize[i].y2 < pI830->pipeDisplaySize[n].y2)
	          pI830->pipeDisplaySize[n].y2 = pI830->displaySize[i].y2;
	    }
         }
      }

      if (pI830->pipeDisplaySize[n].x2 == 4096)
         pI830->pipeDisplaySize[n].x2 = 0;
      if (pI830->pipeDisplaySize[n].y2 == 4096)
         pI830->pipeDisplaySize[n].y2 = 0;
   }
}

static Bool
I830DetectDisplayDevice(ScrnInfoPtr pScrn)
{
   I830Ptr pI830 = I830PTR(pScrn);
   int pipe, n;
   DisplayType i;
   
   /* This seems to lockup some Dell BIOS'. So it's on option to turn on */
   if (pI830->displayInfo) {
       xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		  "Broken BIOSes cause the system to hang here.\n"
		  "\t      If you encounter this problem please add \n"
		  "\t\t Option \"DisplayInfo\" \"FALSE\"\n"
		  "\t      to the Device section of your XF86Config file.\n");
      for (i = 0; i < NumKnownDisplayTypes; i++) {
         if (GetDisplayInfo(pScrn, 1 << i, &pI830->displayAttached[i],
			 &pI830->displayPresent[i],
			 &pI830->displaySize[i].x2,
			 &pI830->displaySize[i].y2)) {
	    xf86DrvMsg(pScrn->scrnIndex, X_INFO,
		    "Display Info: %s: attached: %s, present: %s, size: "
		    "(%d,%d)\n", displayDevices[i],
		    BOOLTOSTRING(pI830->displayAttached[i]),
		    BOOLTOSTRING(pI830->displayPresent[i]),
		    pI830->displaySize[i].x2, pI830->displaySize[i].y2);
         }
      }
   }

   /* Check for active devices connected to each display pipe. */
   for (n = 0; n < pI830->availablePipes; n++) {
      pipe = ((pI830->operatingDevices >> PIPE_SHIFT(n)) & PIPE_ACTIVE_MASK);
      if (pipe)
	 pI830->pipeEnabled[n] = TRUE;
      else
	 pI830->pipeEnabled[n] = FALSE;
   }

   GetPipeSizes(pScrn);

   return TRUE;
}

static int
I830DetectMemory(ScrnInfoPtr pScrn)
{
   I830Ptr pI830 = I830PTR(pScrn);
   PCITAG bridge;
   CARD16 gmch_ctrl;
   int memsize = 0;
   int range;

   bridge = pciTag(0, 0, 0);		/* This is always the host bridge */
   gmch_ctrl = pciReadWord(bridge, I830_GMCH_CTRL);

   /* We need to reduce the stolen size, by the GTT and the popup.
    * The GTT varying according the the FbMapSize and the popup is 4KB */
   range = (pI830->FbMapSize / (1024*1024)) + 4;

   if (IS_I85X(pI830) || IS_I865G(pI830) || IS_I9XX(pI830)) {
      switch (gmch_ctrl & I830_GMCH_GMS_MASK) {
      case I855_GMCH_GMS_STOLEN_1M: