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0001 /*
0002  * intelfb
0003  *
0004  * Linux framebuffer driver for Intel(R) 830M/845G/852GM/855GM/865G/915G/915GM/
0005  * 945G/945GM/945GME/965G/965GM integrated graphics chips.
0006  *
0007  * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
0008  *                   2004 Sylvain Meyer
0009  *                   2006 David Airlie
0010  *
0011  * This driver consists of two parts.  The first part (intelfbdrv.c) provides
0012  * the basic fbdev interfaces, is derived in part from the radeonfb and
0013  * vesafb drivers, and is covered by the GPL.  The second part (intelfbhw.c)
0014  * provides the code to program the hardware.  Most of it is derived from
0015  * the i810/i830 XFree86 driver.  The HW-specific code is covered here
0016  * under a dual license (GPL and MIT/XFree86 license).
0017  *
0018  * Author: David Dawes
0019  *
0020  */
0021 
0022 /* $DHD: intelfb/intelfbdrv.c,v 1.20 2003/06/27 15:17:40 dawes Exp $ */
0023 
0024 /*
0025  * Changes:
0026  *    01/2003 - Initial driver (0.1.0), no mode switching, no acceleration.
0027  *      This initial version is a basic core that works a lot like
0028  *      the vesafb driver.  It must be built-in to the kernel,
0029  *      and the initial video mode must be set with vga=XXX at
0030  *      boot time.  (David Dawes)
0031  *
0032  *    01/2003 - Version 0.2.0: Mode switching added, colormap support
0033  *      implemented, Y panning, and soft screen blanking implemented.
0034  *      No acceleration yet.  (David Dawes)
0035  *
0036  *    01/2003 - Version 0.3.0: fbcon acceleration support added.  Module
0037  *      option handling added.  (David Dawes)
0038  *
0039  *    01/2003 - Version 0.4.0: fbcon HW cursor support added.  (David Dawes)
0040  *
0041  *    01/2003 - Version 0.4.1: Add auto-generation of built-in modes.
0042  *      (David Dawes)
0043  *
0044  *    02/2003 - Version 0.4.2: Add check for active non-CRT devices, and
0045  *      mode validation checks.  (David Dawes)
0046  *
0047  *    02/2003 - Version 0.4.3: Check when the VC is in graphics mode so that
0048  *      acceleration is disabled while an XFree86 server is running.
0049  *      (David Dawes)
0050  *
0051  *    02/2003 - Version 0.4.4: Monitor DPMS support.  (David Dawes)
0052  *
0053  *    02/2003 - Version 0.4.5: Basic XFree86 + fbdev working.  (David Dawes)
0054  *
0055  *    02/2003 - Version 0.5.0: Modify to work with the 2.5.32 kernel as well
0056  *      as 2.4.x kernels.  (David Dawes)
0057  *
0058  *    02/2003 - Version 0.6.0: Split out HW-specifics into a separate file.
0059  *      (David Dawes)
0060  *
0061  *    02/2003 - Version 0.7.0: Test on 852GM/855GM.  Acceleration and HW
0062  *      cursor are disabled on this platform.  (David Dawes)
0063  *
0064  *    02/2003 - Version 0.7.1: Test on 845G.  Acceleration is disabled
0065  *      on this platform.  (David Dawes)
0066  *
0067  *    02/2003 - Version 0.7.2: Test on 830M.  Acceleration and HW
0068  *      cursor are disabled on this platform.  (David Dawes)
0069  *
0070  *    02/2003 - Version 0.7.3: Fix 8-bit modes for mobile platforms
0071  *      (David Dawes)
0072  *
0073  *    02/2003 - Version 0.7.4: Add checks for FB and FBCON_HAS_CFB* configured
0074  *      in the kernel, and add mode bpp verification and default
0075  *      bpp selection based on which FBCON_HAS_CFB* are configured.
0076  *      (David Dawes)
0077  *
0078  *    02/2003 - Version 0.7.5: Add basic package/install scripts based on the
0079  *      DRI packaging scripts.  (David Dawes)
0080  *
0081  *    04/2003 - Version 0.7.6: Fix typo that affects builds with SMP-enabled
0082  *      kernels.  (David Dawes, reported by Anupam).
0083  *
0084  *    06/2003 - Version 0.7.7:
0085  *              Fix Makefile.kernel build problem (Tsutomu Yasuda).
0086  *      Fix mis-placed #endif (2.4.21 kernel).
0087  *
0088  *    09/2004 - Version 0.9.0 - by Sylvain Meyer
0089  *              Port to linux 2.6 kernel fbdev
0090  *              Fix HW accel and HW cursor on i845G
0091  *              Use of agpgart for fb memory reservation
0092  *              Add mtrr support
0093  *
0094  *    10/2004 - Version 0.9.1
0095  *              Use module_param instead of old MODULE_PARM
0096  *              Some cleanup
0097  *
0098  *    11/2004 - Version 0.9.2
0099  *              Add vram option to reserve more memory than stolen by BIOS
0100  *              Fix intelfbhw_pan_display typo
0101  *              Add __initdata annotations
0102  *
0103  *    04/2008 - Version 0.9.5
0104  *              Add support for 965G/965GM. (Maik Broemme <mbroemme@plusserver.de>)
0105  *
0106  *    08/2008 - Version 0.9.6
0107  *              Add support for 945GME. (Phil Endecott <spam_from_intelfb@chezphil.org>)
0108  */
0109 
0110 #include <linux/module.h>
0111 #include <linux/kernel.h>
0112 #include <linux/errno.h>
0113 #include <linux/string.h>
0114 #include <linux/mm.h>
0115 #include <linux/slab.h>
0116 #include <linux/delay.h>
0117 #include <linux/fb.h>
0118 #include <linux/ioport.h>
0119 #include <linux/init.h>
0120 #include <linux/pci.h>
0121 #include <linux/vmalloc.h>
0122 #include <linux/pagemap.h>
0123 #include <linux/screen_info.h>
0124 
0125 #include <asm/io.h>
0126 
0127 #include "intelfb.h"
0128 #include "intelfbhw.h"
0129 #include "../edid.h"
0130 
0131 static void get_initial_mode(struct intelfb_info *dinfo);
0132 static void update_dinfo(struct intelfb_info *dinfo,
0133              struct fb_var_screeninfo *var);
0134 static int intelfb_open(struct fb_info *info, int user);
0135 static int intelfb_release(struct fb_info *info, int user);
0136 static int intelfb_check_var(struct fb_var_screeninfo *var,
0137                  struct fb_info *info);
0138 static int intelfb_set_par(struct fb_info *info);
0139 static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
0140                  unsigned blue, unsigned transp,
0141                  struct fb_info *info);
0142 
0143 static int intelfb_blank(int blank, struct fb_info *info);
0144 static int intelfb_pan_display(struct fb_var_screeninfo *var,
0145                    struct fb_info *info);
0146 
0147 static void intelfb_fillrect(struct fb_info *info,
0148                  const struct fb_fillrect *rect);
0149 static void intelfb_copyarea(struct fb_info *info,
0150                  const struct fb_copyarea *region);
0151 static void intelfb_imageblit(struct fb_info *info,
0152                   const struct fb_image *image);
0153 static int intelfb_cursor(struct fb_info *info,
0154                struct fb_cursor *cursor);
0155 
0156 static int intelfb_sync(struct fb_info *info);
0157 
0158 static int intelfb_ioctl(struct fb_info *info,
0159              unsigned int cmd, unsigned long arg);
0160 
0161 static int intelfb_pci_register(struct pci_dev *pdev,
0162                 const struct pci_device_id *ent);
0163 static void intelfb_pci_unregister(struct pci_dev *pdev);
0164 static int intelfb_set_fbinfo(struct intelfb_info *dinfo);
0165 
0166 /*
0167  * Limiting the class to PCI_CLASS_DISPLAY_VGA prevents function 1 of the
0168  * mobile chipsets from being registered.
0169  */
0170 #if DETECT_VGA_CLASS_ONLY
0171 #define INTELFB_CLASS_MASK ~0 << 8
0172 #else
0173 #define INTELFB_CLASS_MASK 0
0174 #endif
0175 
0176 static const struct pci_device_id intelfb_pci_table[] = {
0177     { 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 },
0178     { 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 },
0179     { 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 },
0180     { 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 },
0181     { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_854, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_854 },
0182     { 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 },
0183     { 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 },
0184     { 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 },
0185     { 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 },
0186     { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_945GME, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_945GME },
0187     { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_965G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_965G },
0188     { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_965GM, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_965GM },
0189     { 0, }
0190 };
0191 
0192 /* Global data */
0193 static int num_registered = 0;
0194 
0195 /* fb ops */
0196 static const struct fb_ops intel_fb_ops = {
0197     .owner =        THIS_MODULE,
0198     .fb_open =              intelfb_open,
0199     .fb_release =           intelfb_release,
0200     .fb_check_var =         intelfb_check_var,
0201     .fb_set_par =           intelfb_set_par,
0202     .fb_setcolreg =     intelfb_setcolreg,
0203     .fb_blank =     intelfb_blank,
0204     .fb_pan_display =       intelfb_pan_display,
0205     .fb_fillrect  =         intelfb_fillrect,
0206     .fb_copyarea  =         intelfb_copyarea,
0207     .fb_imageblit =         intelfb_imageblit,
0208     .fb_cursor =            intelfb_cursor,
0209     .fb_sync =              intelfb_sync,
0210     .fb_ioctl =     intelfb_ioctl
0211 };
0212 
0213 /* PCI driver module table */
0214 static struct pci_driver intelfb_driver = {
0215     .name =     "intelfb",
0216     .id_table = intelfb_pci_table,
0217     .probe =    intelfb_pci_register,
0218     .remove =   intelfb_pci_unregister,
0219 };
0220 
0221 /* Module description/parameters */
0222 MODULE_AUTHOR("David Dawes <dawes@tungstengraphics.com>, "
0223           "Sylvain Meyer <sylvain.meyer@worldonline.fr>");
0224 MODULE_DESCRIPTION("Framebuffer driver for Intel(R) " SUPPORTED_CHIPSETS
0225            " chipsets");
0226 MODULE_LICENSE("Dual BSD/GPL");
0227 MODULE_DEVICE_TABLE(pci, intelfb_pci_table);
0228 
0229 static bool accel       = 1;
0230 static int vram         = 4;
0231 static bool hwcursor    = 0;
0232 static bool mtrr        = 1;
0233 static bool fixed       = 0;
0234 static bool noinit      = 0;
0235 static bool noregister  = 0;
0236 static bool probeonly   = 0;
0237 static bool idonly      = 0;
0238 static int bailearly    = 0;
0239 static int voffset  = 48;
0240 static char *mode       = NULL;
0241 
0242 module_param(accel, bool, S_IRUGO);
0243 MODULE_PARM_DESC(accel, "Enable hardware acceleration");
0244 module_param(vram, int, S_IRUGO);
0245 MODULE_PARM_DESC(vram, "System RAM to allocate to framebuffer in MiB");
0246 module_param(voffset, int, S_IRUGO);
0247 MODULE_PARM_DESC(voffset, "Offset of framebuffer in MiB");
0248 module_param(hwcursor, bool, S_IRUGO);
0249 MODULE_PARM_DESC(hwcursor, "Enable HW cursor");
0250 module_param(mtrr, bool, S_IRUGO);
0251 MODULE_PARM_DESC(mtrr, "Enable MTRR support");
0252 module_param(fixed, bool, S_IRUGO);
0253 MODULE_PARM_DESC(fixed, "Disable mode switching");
0254 module_param(noinit, bool, 0);
0255 MODULE_PARM_DESC(noinit, "Don't initialise graphics mode when loading");
0256 module_param(noregister, bool, 0);
0257 MODULE_PARM_DESC(noregister, "Don't register, just probe and exit (debug)");
0258 module_param(probeonly, bool, 0);
0259 MODULE_PARM_DESC(probeonly, "Do a minimal probe (debug)");
0260 module_param(idonly, bool, 0);
0261 MODULE_PARM_DESC(idonly, "Just identify without doing anything else (debug)");
0262 module_param(bailearly, int, 0);
0263 MODULE_PARM_DESC(bailearly, "Bail out early, depending on value (debug)");
0264 module_param(mode, charp, S_IRUGO);
0265 MODULE_PARM_DESC(mode,
0266          "Initial video mode \"<xres>x<yres>[-<depth>][@<refresh>]\"");
0267 
0268 #ifndef MODULE
0269 #define OPT_EQUAL(opt, name) (!strncmp(opt, name, strlen(name)))
0270 #define OPT_INTVAL(opt, name) simple_strtoul(opt + strlen(name) + 1, NULL, 0)
0271 #define OPT_STRVAL(opt, name) (opt + strlen(name))
0272 
0273 static __inline__ char * get_opt_string(const char *this_opt, const char *name)
0274 {
0275     const char *p;
0276     int i;
0277     char *ret;
0278 
0279     p = OPT_STRVAL(this_opt, name);
0280     i = 0;
0281     while (p[i] && p[i] != ' ' && p[i] != ',')
0282         i++;
0283     ret = kmalloc(i + 1, GFP_KERNEL);
0284     if (ret) {
0285         strncpy(ret, p, i);
0286         ret[i] = '\0';
0287     }
0288     return ret;
0289 }
0290 
0291 static __inline__ int get_opt_int(const char *this_opt, const char *name,
0292                   int *ret)
0293 {
0294     if (!ret)
0295         return 0;
0296 
0297     if (!OPT_EQUAL(this_opt, name))
0298         return 0;
0299 
0300     *ret = OPT_INTVAL(this_opt, name);
0301     return 1;
0302 }
0303 
0304 static __inline__ int get_opt_bool(const char *this_opt, const char *name,
0305                    bool *ret)
0306 {
0307     if (!ret)
0308         return 0;
0309 
0310     if (OPT_EQUAL(this_opt, name)) {
0311         if (this_opt[strlen(name)] == '=')
0312             *ret = simple_strtoul(this_opt + strlen(name) + 1,
0313                           NULL, 0);
0314         else
0315             *ret = 1;
0316     } else {
0317         if (OPT_EQUAL(this_opt, "no") && OPT_EQUAL(this_opt + 2, name))
0318             *ret = 0;
0319         else
0320             return 0;
0321     }
0322     return 1;
0323 }
0324 
0325 static int __init intelfb_setup(char *options)
0326 {
0327     char *this_opt;
0328 
0329     DBG_MSG("intelfb_setup\n");
0330 
0331     if (!options || !*options) {
0332         DBG_MSG("no options\n");
0333         return 0;
0334     } else
0335         DBG_MSG("options: %s\n", options);
0336 
0337     /*
0338      * These are the built-in options analogous to the module parameters
0339      * defined above.
0340      *
0341      * The syntax is:
0342      *
0343      *    video=intelfb:[mode][,<param>=<val>] ...
0344      *
0345      * e.g.,
0346      *
0347      *    video=intelfb:1024x768-16@75,accel=0
0348      */
0349 
0350     while ((this_opt = strsep(&options, ","))) {
0351         if (!*this_opt)
0352             continue;
0353         if (get_opt_bool(this_opt, "accel", &accel))
0354             ;
0355         else if (get_opt_int(this_opt, "vram", &vram))
0356             ;
0357         else if (get_opt_bool(this_opt, "hwcursor", &hwcursor))
0358             ;
0359         else if (get_opt_bool(this_opt, "mtrr", &mtrr))
0360             ;
0361         else if (get_opt_bool(this_opt, "fixed", &fixed))
0362             ;
0363         else if (get_opt_bool(this_opt, "init", &noinit))
0364             noinit = !noinit;
0365         else if (OPT_EQUAL(this_opt, "mode="))
0366             mode = get_opt_string(this_opt, "mode=");
0367         else
0368             mode = this_opt;
0369     }
0370 
0371     return 0;
0372 }
0373 
0374 #endif
0375 
0376 static int __init intelfb_init(void)
0377 {
0378 #ifndef MODULE
0379     char *option = NULL;
0380 #endif
0381 
0382     DBG_MSG("intelfb_init\n");
0383 
0384     INF_MSG("Framebuffer driver for "
0385         "Intel(R) " SUPPORTED_CHIPSETS " chipsets\n");
0386     INF_MSG("Version " INTELFB_VERSION "\n");
0387 
0388     if (idonly)
0389         return -ENODEV;
0390 
0391 #ifndef MODULE
0392     if (fb_get_options("intelfb", &option))
0393         return -ENODEV;
0394     intelfb_setup(option);
0395 #endif
0396 
0397     return pci_register_driver(&intelfb_driver);
0398 }
0399 
0400 static void __exit intelfb_exit(void)
0401 {
0402     DBG_MSG("intelfb_exit\n");
0403     pci_unregister_driver(&intelfb_driver);
0404 }
0405 
0406 module_init(intelfb_init);
0407 module_exit(intelfb_exit);
0408 
0409 /***************************************************************
0410  *                        driver init / cleanup                *
0411  ***************************************************************/
0412 
0413 static void cleanup(struct intelfb_info *dinfo)
0414 {
0415     DBG_MSG("cleanup\n");
0416 
0417     if (!dinfo)
0418         return;
0419 
0420     intelfbhw_disable_irq(dinfo);
0421 
0422     fb_dealloc_cmap(&dinfo->info->cmap);
0423     kfree(dinfo->info->pixmap.addr);
0424 
0425     if (dinfo->registered)
0426         unregister_framebuffer(dinfo->info);
0427 
0428     arch_phys_wc_del(dinfo->wc_cookie);
0429 
0430     if (dinfo->fbmem_gart && dinfo->gtt_fb_mem) {
0431         agp_unbind_memory(dinfo->gtt_fb_mem);
0432         agp_free_memory(dinfo->gtt_fb_mem);
0433     }
0434     if (dinfo->gtt_cursor_mem) {
0435         agp_unbind_memory(dinfo->gtt_cursor_mem);
0436         agp_free_memory(dinfo->gtt_cursor_mem);
0437     }
0438     if (dinfo->gtt_ring_mem) {
0439         agp_unbind_memory(dinfo->gtt_ring_mem);
0440         agp_free_memory(dinfo->gtt_ring_mem);
0441     }
0442 
0443 #ifdef CONFIG_FB_INTEL_I2C
0444     /* un-register I2C bus */
0445     intelfb_delete_i2c_busses(dinfo);
0446 #endif
0447 
0448     if (dinfo->mmio_base)
0449         iounmap((void __iomem *)dinfo->mmio_base);
0450     if (dinfo->aperture.virtual)
0451         iounmap((void __iomem *)dinfo->aperture.virtual);
0452 
0453     if (dinfo->flag & INTELFB_MMIO_ACQUIRED)
0454         release_mem_region(dinfo->mmio_base_phys, INTEL_REG_SIZE);
0455     if (dinfo->flag & INTELFB_FB_ACQUIRED)
0456         release_mem_region(dinfo->aperture.physical,
0457                    dinfo->aperture.size);
0458     framebuffer_release(dinfo->info);
0459 }
0460 
0461 #define bailout(dinfo) do {                     \
0462     DBG_MSG("bailout\n");                       \
0463     cleanup(dinfo);                         \
0464     INF_MSG("Not going to register framebuffer, exiting...\n"); \
0465     return -ENODEV;                         \
0466 } while (0)
0467 
0468 
0469 static int intelfb_pci_register(struct pci_dev *pdev,
0470                 const struct pci_device_id *ent)
0471 {
0472     struct fb_info *info;
0473     struct intelfb_info *dinfo;
0474     int i, err, dvo;
0475     int aperture_size, stolen_size = 0;
0476     struct agp_kern_info gtt_info;
0477     int agp_memtype;
0478     const char *s;
0479     struct agp_bridge_data *bridge;
0480     int aperture_bar = 0;
0481     int mmio_bar = 1;
0482     int offset;
0483 
0484     DBG_MSG("intelfb_pci_register\n");
0485 
0486     num_registered++;
0487     if (num_registered != 1) {
0488         ERR_MSG("Attempted to register %d devices "
0489             "(should be only 1).\n", num_registered);
0490         return -ENODEV;
0491     }
0492 
0493     info = framebuffer_alloc(sizeof(struct intelfb_info), &pdev->dev);
0494     if (!info)
0495         return -ENOMEM;
0496 
0497     if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
0498         ERR_MSG("Could not allocate cmap for intelfb_info.\n");
0499         goto err_out_cmap;
0500     }
0501 
0502     dinfo = info->par;
0503     dinfo->info  = info;
0504     dinfo->fbops = &intel_fb_ops;
0505     dinfo->pdev  = pdev;
0506 
0507     /* Reserve pixmap space. */
0508     info->pixmap.addr = kzalloc(64 * 1024, GFP_KERNEL);
0509     if (info->pixmap.addr == NULL) {
0510         ERR_MSG("Cannot reserve pixmap memory.\n");
0511         goto err_out_pixmap;
0512     }
0513 
0514     /* set early this option because it could be changed by tv encoder
0515        driver */
0516     dinfo->fixed_mode = fixed;
0517 
0518     /* Enable device. */
0519     if ((err = pci_enable_device(pdev))) {
0520         ERR_MSG("Cannot enable device.\n");
0521         cleanup(dinfo);
0522         return -ENODEV;
0523     }
0524 
0525     /* Set base addresses. */
0526     if ((ent->device == PCI_DEVICE_ID_INTEL_915G) ||
0527         (ent->device == PCI_DEVICE_ID_INTEL_915GM) ||
0528         (ent->device == PCI_DEVICE_ID_INTEL_945G)  ||
0529         (ent->device == PCI_DEVICE_ID_INTEL_945GM) ||
0530         (ent->device == PCI_DEVICE_ID_INTEL_945GME) ||
0531         (ent->device == PCI_DEVICE_ID_INTEL_965G) ||
0532         (ent->device == PCI_DEVICE_ID_INTEL_965GM)) {
0533 
0534         aperture_bar = 2;
0535         mmio_bar = 0;
0536     }
0537     dinfo->aperture.physical = pci_resource_start(pdev, aperture_bar);
0538     dinfo->aperture.size     = pci_resource_len(pdev, aperture_bar);
0539     dinfo->mmio_base_phys    = pci_resource_start(pdev, mmio_bar);
0540     DBG_MSG("fb aperture: 0x%llx/0x%llx, MMIO region: 0x%llx/0x%llx\n",
0541         (unsigned long long)pci_resource_start(pdev, aperture_bar),
0542         (unsigned long long)pci_resource_len(pdev, aperture_bar),
0543         (unsigned long long)pci_resource_start(pdev, mmio_bar),
0544         (unsigned long long)pci_resource_len(pdev, mmio_bar));
0545 
0546     /* Reserve the fb and MMIO regions */
0547     if (!request_mem_region(dinfo->aperture.physical, dinfo->aperture.size,
0548                 INTELFB_MODULE_NAME)) {
0549         ERR_MSG("Cannot reserve FB region.\n");
0550         cleanup(dinfo);
0551         return -ENODEV;
0552     }
0553 
0554     dinfo->flag |= INTELFB_FB_ACQUIRED;
0555 
0556     if (!request_mem_region(dinfo->mmio_base_phys,
0557                 INTEL_REG_SIZE,
0558                 INTELFB_MODULE_NAME)) {
0559         ERR_MSG("Cannot reserve MMIO region.\n");
0560         cleanup(dinfo);
0561         return -ENODEV;
0562     }
0563 
0564     dinfo->flag |= INTELFB_MMIO_ACQUIRED;
0565 
0566     /* Get the chipset info. */
0567     dinfo->pci_chipset = pdev->device;
0568 
0569     if (intelfbhw_get_chipset(pdev, dinfo)) {
0570         cleanup(dinfo);
0571         return -ENODEV;
0572     }
0573 
0574     if (intelfbhw_get_memory(pdev, &aperture_size, &stolen_size)) {
0575         cleanup(dinfo);
0576         return -ENODEV;
0577     }
0578 
0579     INF_MSG("%02x:%02x.%d: %s, aperture size %dMB, "
0580         "stolen memory %dkB\n",
0581         pdev->bus->number, PCI_SLOT(pdev->devfn),
0582         PCI_FUNC(pdev->devfn), dinfo->name,
0583         BtoMB(aperture_size), BtoKB(stolen_size));
0584 
0585     /* Set these from the options. */
0586     dinfo->accel    = accel;
0587     dinfo->hwcursor = hwcursor;
0588 
0589     if (NOACCEL_CHIPSET(dinfo) && dinfo->accel == 1) {
0590         INF_MSG("Acceleration is not supported for the %s chipset.\n",
0591             dinfo->name);
0592         dinfo->accel = 0;
0593     }
0594 
0595     /* Framebuffer parameters - Use all the stolen memory if >= vram */
0596     if (ROUND_UP_TO_PAGE(stolen_size) >= MB(vram)) {
0597         dinfo->fb.size = ROUND_UP_TO_PAGE(stolen_size);
0598         dinfo->fbmem_gart = 0;
0599     } else {
0600         dinfo->fb.size =  MB(vram);
0601         dinfo->fbmem_gart = 1;
0602     }
0603 
0604     /* Allocate space for the ring buffer and HW cursor if enabled. */
0605     if (dinfo->accel) {
0606         dinfo->ring.size = RINGBUFFER_SIZE;
0607         dinfo->ring_tail_mask = dinfo->ring.size - 1;
0608     }
0609     if (dinfo->hwcursor)
0610         dinfo->cursor.size = HW_CURSOR_SIZE;
0611 
0612     /* Use agpgart to manage the GATT */
0613     if (!(bridge = agp_backend_acquire(pdev))) {
0614         ERR_MSG("cannot acquire agp\n");
0615         cleanup(dinfo);
0616         return -ENODEV;
0617     }
0618 
0619     /* get the current gatt info */
0620     if (agp_copy_info(bridge, &gtt_info)) {
0621         ERR_MSG("cannot get agp info\n");
0622         agp_backend_release(bridge);
0623         cleanup(dinfo);
0624         return -ENODEV;
0625     }
0626 
0627     if (MB(voffset) < stolen_size)
0628         offset = (stolen_size >> 12);
0629     else
0630         offset = ROUND_UP_TO_PAGE(MB(voffset))/GTT_PAGE_SIZE;
0631 
0632     /* set the mem offsets - set them after the already used pages */
0633     if (dinfo->accel)
0634         dinfo->ring.offset = offset + gtt_info.current_memory;
0635     if (dinfo->hwcursor)
0636         dinfo->cursor.offset = offset +
0637             + gtt_info.current_memory + (dinfo->ring.size >> 12);
0638     if (dinfo->fbmem_gart)
0639         dinfo->fb.offset = offset +
0640             + gtt_info.current_memory + (dinfo->ring.size >> 12)
0641             + (dinfo->cursor.size >> 12);
0642 
0643     /* Allocate memories (which aren't stolen) */
0644     /* Map the fb and MMIO regions */
0645     /* ioremap only up to the end of used aperture */
0646     dinfo->aperture.virtual = (u8 __iomem *)ioremap_wc
0647         (dinfo->aperture.physical, ((offset + dinfo->fb.offset) << 12)
0648          + dinfo->fb.size);
0649     if (!dinfo->aperture.virtual) {
0650         ERR_MSG("Cannot remap FB region.\n");
0651         agp_backend_release(bridge);
0652         cleanup(dinfo);
0653         return -ENODEV;
0654     }
0655 
0656     dinfo->mmio_base =
0657         (u8 __iomem *)ioremap(dinfo->mmio_base_phys,
0658                           INTEL_REG_SIZE);
0659     if (!dinfo->mmio_base) {
0660         ERR_MSG("Cannot remap MMIO region.\n");
0661         agp_backend_release(bridge);
0662         cleanup(dinfo);
0663         return -ENODEV;
0664     }
0665 
0666     if (dinfo->accel) {
0667         if (!(dinfo->gtt_ring_mem =
0668               agp_allocate_memory(bridge, dinfo->ring.size >> 12,
0669                       AGP_NORMAL_MEMORY))) {
0670             ERR_MSG("cannot allocate ring buffer memory\n");
0671             agp_backend_release(bridge);
0672             cleanup(dinfo);
0673             return -ENOMEM;
0674         }
0675         if (agp_bind_memory(dinfo->gtt_ring_mem,
0676                     dinfo->ring.offset)) {
0677             ERR_MSG("cannot bind ring buffer memory\n");
0678             agp_backend_release(bridge);
0679             cleanup(dinfo);
0680             return -EBUSY;
0681         }
0682         dinfo->ring.physical = dinfo->aperture.physical
0683             + (dinfo->ring.offset << 12);
0684         dinfo->ring.virtual  = dinfo->aperture.virtual
0685             + (dinfo->ring.offset << 12);
0686         dinfo->ring_head = 0;
0687     }
0688     if (dinfo->hwcursor) {
0689         agp_memtype = dinfo->mobile ? AGP_PHYSICAL_MEMORY
0690             : AGP_NORMAL_MEMORY;
0691         if (!(dinfo->gtt_cursor_mem =
0692               agp_allocate_memory(bridge, dinfo->cursor.size >> 12,
0693                       agp_memtype))) {
0694             ERR_MSG("cannot allocate cursor memory\n");
0695             agp_backend_release(bridge);
0696             cleanup(dinfo);
0697             return -ENOMEM;
0698         }
0699         if (agp_bind_memory(dinfo->gtt_cursor_mem,
0700                     dinfo->cursor.offset)) {
0701             ERR_MSG("cannot bind cursor memory\n");
0702             agp_backend_release(bridge);
0703             cleanup(dinfo);
0704             return -EBUSY;
0705         }
0706         if (dinfo->mobile)
0707             dinfo->cursor.physical
0708                 = dinfo->gtt_cursor_mem->physical;
0709         else
0710             dinfo->cursor.physical = dinfo->aperture.physical
0711                 + (dinfo->cursor.offset << 12);
0712         dinfo->cursor.virtual = dinfo->aperture.virtual
0713             + (dinfo->cursor.offset << 12);
0714     }
0715     if (dinfo->fbmem_gart) {
0716         if (!(dinfo->gtt_fb_mem =
0717               agp_allocate_memory(bridge, dinfo->fb.size >> 12,
0718                       AGP_NORMAL_MEMORY))) {
0719             WRN_MSG("cannot allocate framebuffer memory - use "
0720                 "the stolen one\n");
0721             dinfo->fbmem_gart = 0;
0722         }
0723         if (agp_bind_memory(dinfo->gtt_fb_mem,
0724                     dinfo->fb.offset)) {
0725             WRN_MSG("cannot bind framebuffer memory - use "
0726                 "the stolen one\n");
0727             dinfo->fbmem_gart = 0;
0728         }
0729     }
0730 
0731     /* update framebuffer memory parameters */
0732     if (!dinfo->fbmem_gart)
0733         dinfo->fb.offset = 0;   /* starts at offset 0 */
0734     dinfo->fb.physical = dinfo->aperture.physical
0735         + (dinfo->fb.offset << 12);
0736     dinfo->fb.virtual = dinfo->aperture.virtual + (dinfo->fb.offset << 12);
0737     dinfo->fb_start = dinfo->fb.offset << 12;
0738 
0739     /* release agpgart */
0740     agp_backend_release(bridge);
0741 
0742     if (mtrr)
0743         dinfo->wc_cookie = arch_phys_wc_add(dinfo->aperture.physical,
0744                             dinfo->aperture.size);
0745 
0746     DBG_MSG("fb: 0x%x(+ 0x%x)/0x%x (0x%p)\n",
0747         dinfo->fb.physical, dinfo->fb.offset, dinfo->fb.size,
0748         dinfo->fb.virtual);
0749     DBG_MSG("MMIO: 0x%x/0x%x (0x%p)\n",
0750         dinfo->mmio_base_phys, INTEL_REG_SIZE,
0751         dinfo->mmio_base);
0752     DBG_MSG("ring buffer: 0x%x/0x%x (0x%p)\n",
0753         dinfo->ring.physical, dinfo->ring.size,
0754         dinfo->ring.virtual);
0755     DBG_MSG("HW cursor: 0x%x/0x%x (0x%p) (offset 0x%x) (phys 0x%x)\n",
0756         dinfo->cursor.physical, dinfo->cursor.size,
0757         dinfo->cursor.virtual, dinfo->cursor.offset,
0758         dinfo->cursor.physical);
0759 
0760     DBG_MSG("options: vram = %d, accel = %d, hwcursor = %d, fixed = %d, "
0761         "noinit = %d\n", vram, accel, hwcursor, fixed, noinit);
0762     DBG_MSG("options: mode = \"%s\"\n", mode ? mode : "");
0763 
0764     if (probeonly)
0765         bailout(dinfo);
0766 
0767     /*
0768      * Check if the LVDS port or any DVO ports are enabled.  If so,
0769      * don't allow mode switching
0770      */
0771     dvo = intelfbhw_check_non_crt(dinfo);
0772     if (dvo) {
0773         dinfo->fixed_mode = 1;
0774         WRN_MSG("Non-CRT device is enabled ( ");
0775         i = 0;
0776         while (dvo) {
0777             if (dvo & 1) {
0778                 s = intelfbhw_dvo_to_string(1 << i);
0779                 if (s)
0780                     printk("%s ", s);
0781             }
0782             dvo >>= 1;
0783             ++i;
0784         }
0785         printk(").  Disabling mode switching.\n");
0786     }
0787 
0788     if (bailearly == 1)
0789         bailout(dinfo);
0790 
0791     if (FIXED_MODE(dinfo) &&
0792         screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB) {
0793         ERR_MSG("Video mode must be programmed at boot time.\n");
0794         cleanup(dinfo);
0795         return -ENODEV;
0796     }
0797 
0798     if (bailearly == 2)
0799         bailout(dinfo);
0800 
0801     /* Initialise dinfo and related data. */
0802     /* If an initial mode was programmed at boot time, get its details. */
0803     if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
0804         get_initial_mode(dinfo);
0805 
0806     if (bailearly == 3)
0807         bailout(dinfo);
0808 
0809     if (FIXED_MODE(dinfo))  /* remap fb address */
0810         update_dinfo(dinfo, &dinfo->initial_var);
0811 
0812     if (bailearly == 4)
0813         bailout(dinfo);
0814 
0815 
0816     if (intelfb_set_fbinfo(dinfo)) {
0817         cleanup(dinfo);
0818         return -ENODEV;
0819     }
0820 
0821     if (bailearly == 5)
0822         bailout(dinfo);
0823 
0824 #ifdef CONFIG_FB_INTEL_I2C
0825     /* register I2C bus */
0826     intelfb_create_i2c_busses(dinfo);
0827 #endif
0828 
0829     if (bailearly == 6)
0830         bailout(dinfo);
0831 
0832     pci_set_drvdata(pdev, dinfo);
0833 
0834     /* Save the initial register state. */
0835     i = intelfbhw_read_hw_state(dinfo, &dinfo->save_state,
0836                     bailearly > 6 ? bailearly - 6 : 0);
0837     if (i != 0) {
0838         DBG_MSG("intelfbhw_read_hw_state returned %d\n", i);
0839         bailout(dinfo);
0840     }
0841 
0842     intelfbhw_print_hw_state(dinfo, &dinfo->save_state);
0843 
0844     if (bailearly == 18)
0845         bailout(dinfo);
0846 
0847     /* read active pipe */
0848     dinfo->pipe = intelfbhw_active_pipe(&dinfo->save_state);
0849 
0850     /* Cursor initialisation */
0851     if (dinfo->hwcursor) {
0852         intelfbhw_cursor_init(dinfo);
0853         intelfbhw_cursor_reset(dinfo);
0854     }
0855 
0856     if (bailearly == 19)
0857         bailout(dinfo);
0858 
0859     /* 2d acceleration init */
0860     if (dinfo->accel)
0861         intelfbhw_2d_start(dinfo);
0862 
0863     if (bailearly == 20)
0864         bailout(dinfo);
0865 
0866     if (noregister)
0867         bailout(dinfo);
0868 
0869     if (register_framebuffer(dinfo->info) < 0) {
0870         ERR_MSG("Cannot register framebuffer.\n");
0871         cleanup(dinfo);
0872         return -ENODEV;
0873     }
0874 
0875     dinfo->registered = 1;
0876     dinfo->open = 0;
0877 
0878     init_waitqueue_head(&dinfo->vsync.wait);
0879     spin_lock_init(&dinfo->int_lock);
0880     dinfo->irq_flags = 0;
0881     dinfo->vsync.pan_display = 0;
0882     dinfo->vsync.pan_offset = 0;
0883 
0884     return 0;
0885 
0886 err_out_pixmap:
0887     fb_dealloc_cmap(&info->cmap);
0888 err_out_cmap:
0889     framebuffer_release(info);
0890     return -ENODEV;
0891 }
0892 
0893 static void intelfb_pci_unregister(struct pci_dev *pdev)
0894 {
0895     struct intelfb_info *dinfo = pci_get_drvdata(pdev);
0896 
0897     DBG_MSG("intelfb_pci_unregister\n");
0898 
0899     if (!dinfo)
0900         return;
0901 
0902     cleanup(dinfo);
0903 }
0904 
0905 /***************************************************************
0906  *                       helper functions                      *
0907  ***************************************************************/
0908 
0909 __inline__ int intelfb_var_to_depth(const struct fb_var_screeninfo *var)
0910 {
0911     DBG_MSG("intelfb_var_to_depth: bpp: %d, green.length is %d\n",
0912         var->bits_per_pixel, var->green.length);
0913 
0914     switch (var->bits_per_pixel) {
0915     case 16:
0916         return (var->green.length == 6) ? 16 : 15;
0917     case 32:
0918         return 24;
0919     default:
0920         return var->bits_per_pixel;
0921     }
0922 }
0923 
0924 
0925 static __inline__ int var_to_refresh(const struct fb_var_screeninfo *var)
0926 {
0927     int xtot = var->xres + var->left_margin + var->right_margin +
0928            var->hsync_len;
0929     int ytot = var->yres + var->upper_margin + var->lower_margin +
0930            var->vsync_len;
0931 
0932     return (1000000000 / var->pixclock * 1000 + 500) / xtot / ytot;
0933 }
0934 
0935 /***************************************************************
0936  *                Various initialisation functions             *
0937  ***************************************************************/
0938 
0939 static void get_initial_mode(struct intelfb_info *dinfo)
0940 {
0941     struct fb_var_screeninfo *var;
0942     int xtot, ytot;
0943 
0944     DBG_MSG("get_initial_mode\n");
0945 
0946     dinfo->initial_vga = 1;
0947     dinfo->initial_fb_base = screen_info.lfb_base;
0948     dinfo->initial_video_ram = screen_info.lfb_size * KB(64);
0949     dinfo->initial_pitch = screen_info.lfb_linelength;
0950 
0951     var = &dinfo->initial_var;
0952     memset(var, 0, sizeof(*var));
0953     var->xres = screen_info.lfb_width;
0954     var->yres = screen_info.lfb_height;
0955     var->bits_per_pixel = screen_info.lfb_depth;
0956     switch (screen_info.lfb_depth) {
0957     case 15:
0958         var->bits_per_pixel = 16;
0959         break;
0960     case 24:
0961         var->bits_per_pixel = 32;
0962         break;
0963     }
0964 
0965     DBG_MSG("Initial info: FB is 0x%x/0x%x (%d kByte)\n",
0966         dinfo->initial_fb_base, dinfo->initial_video_ram,
0967         BtoKB(dinfo->initial_video_ram));
0968 
0969     DBG_MSG("Initial info: mode is %dx%d-%d (%d)\n",
0970         var->xres, var->yres, var->bits_per_pixel,
0971         dinfo->initial_pitch);
0972 
0973     /* Dummy timing values (assume 60Hz) */
0974     var->left_margin = (var->xres / 8) & 0xf8;
0975     var->right_margin = 32;
0976     var->upper_margin = 16;
0977     var->lower_margin = 4;
0978     var->hsync_len = (var->xres / 8) & 0xf8;
0979     var->vsync_len = 4;
0980 
0981     xtot = var->xres + var->left_margin +
0982         var->right_margin + var->hsync_len;
0983     ytot = var->yres + var->upper_margin +
0984         var->lower_margin + var->vsync_len;
0985     var->pixclock = 10000000 / xtot * 1000 / ytot * 100 / 60;
0986 
0987     var->height = -1;
0988     var->width = -1;
0989 
0990     if (var->bits_per_pixel > 8) {
0991         var->red.offset = screen_info.red_pos;
0992         var->red.length = screen_info.red_size;
0993         var->green.offset = screen_info.green_pos;
0994         var->green.length = screen_info.green_size;
0995         var->blue.offset = screen_info.blue_pos;
0996         var->blue.length = screen_info.blue_size;
0997         var->transp.offset = screen_info.rsvd_pos;
0998         var->transp.length = screen_info.rsvd_size;
0999     } else {
1000         var->red.length = 8;
1001         var->green.length = 8;
1002         var->blue.length = 8;
1003     }
1004 }
1005 
1006 static int intelfb_init_var(struct intelfb_info *dinfo)
1007 {
1008     struct fb_var_screeninfo *var;
1009     int msrc = 0;
1010 
1011     DBG_MSG("intelfb_init_var\n");
1012 
1013     var = &dinfo->info->var;
1014     if (FIXED_MODE(dinfo)) {
1015             memcpy(var, &dinfo->initial_var,
1016                sizeof(struct fb_var_screeninfo));
1017         msrc = 5;
1018     } else {
1019         const u8 *edid_s = fb_firmware_edid(&dinfo->pdev->dev);
1020         u8 *edid_d = NULL;
1021 
1022         if (edid_s) {
1023             edid_d = kmemdup(edid_s, EDID_LENGTH, GFP_KERNEL);
1024 
1025             if (edid_d) {
1026                 fb_edid_to_monspecs(edid_d,
1027                             &dinfo->info->monspecs);
1028                 kfree(edid_d);
1029             }
1030         }
1031 
1032         if (mode) {
1033             printk("intelfb: Looking for mode in private "
1034                    "database\n");
1035             msrc = fb_find_mode(var, dinfo->info, mode,
1036                         dinfo->info->monspecs.modedb,
1037                         dinfo->info->monspecs.modedb_len,
1038                         NULL, 0);
1039 
1040             if (msrc && msrc > 1) {
1041                 printk("intelfb: No mode in private database, "
1042                        "intelfb: looking for mode in global "
1043                        "database ");
1044                 msrc = fb_find_mode(var, dinfo->info, mode,
1045                             NULL, 0, NULL, 0);
1046 
1047                 if (msrc)
1048                     msrc |= 8;
1049             }
1050 
1051         }
1052 
1053         if (!msrc)
1054             msrc = fb_find_mode(var, dinfo->info, PREFERRED_MODE,
1055                         NULL, 0, NULL, 0);
1056     }
1057 
1058     if (!msrc) {
1059         ERR_MSG("Cannot find a suitable video mode.\n");
1060         return 1;
1061     }
1062 
1063     INF_MSG("Initial video mode is %dx%d-%d@%d.\n", var->xres, var->yres,
1064         var->bits_per_pixel, var_to_refresh(var));
1065 
1066     DBG_MSG("Initial video mode is from %d.\n", msrc);
1067 
1068 #if ALLOCATE_FOR_PANNING
1069     /* Allow use of half of the video ram for panning */
1070     var->xres_virtual = var->xres;
1071     var->yres_virtual =
1072         dinfo->fb.size / 2 / (var->bits_per_pixel * var->xres);
1073     if (var->yres_virtual < var->yres)
1074         var->yres_virtual = var->yres;
1075 #else
1076     var->yres_virtual = var->yres;
1077 #endif
1078 
1079     if (dinfo->accel)
1080         var->accel_flags |= FB_ACCELF_TEXT;
1081     else
1082         var->accel_flags &= ~FB_ACCELF_TEXT;
1083 
1084     return 0;
1085 }
1086 
1087 static int intelfb_set_fbinfo(struct intelfb_info *dinfo)
1088 {
1089     struct fb_info *info = dinfo->info;
1090 
1091     DBG_MSG("intelfb_set_fbinfo\n");
1092 
1093     info->flags = FBINFO_FLAG_DEFAULT;
1094     info->fbops = &intel_fb_ops;
1095     info->pseudo_palette = dinfo->pseudo_palette;
1096 
1097     info->pixmap.size = 64*1024;
1098     info->pixmap.buf_align = 8;
1099     info->pixmap.access_align = 32;
1100     info->pixmap.flags = FB_PIXMAP_SYSTEM;
1101 
1102     if (intelfb_init_var(dinfo))
1103         return 1;
1104 
1105     info->pixmap.scan_align = 1;
1106     strcpy(info->fix.id, dinfo->name);
1107     info->fix.smem_start = dinfo->fb.physical;
1108     info->fix.smem_len = dinfo->fb.size;
1109     info->fix.type = FB_TYPE_PACKED_PIXELS;
1110     info->fix.type_aux = 0;
1111     info->fix.xpanstep = 8;
1112     info->fix.ypanstep = 1;
1113     info->fix.ywrapstep = 0;
1114     info->fix.mmio_start = dinfo->mmio_base_phys;
1115     info->fix.mmio_len = INTEL_REG_SIZE;
1116     info->fix.accel = FB_ACCEL_I830;
1117     update_dinfo(dinfo, &info->var);
1118 
1119     return 0;
1120 }
1121 
1122 /* Update dinfo to match the active video mode. */
1123 static void update_dinfo(struct intelfb_info *dinfo,
1124              struct fb_var_screeninfo *var)
1125 {
1126     DBG_MSG("update_dinfo\n");
1127 
1128     dinfo->bpp = var->bits_per_pixel;
1129     dinfo->depth = intelfb_var_to_depth(var);
1130     dinfo->xres = var->xres;
1131     dinfo->yres = var->xres;
1132     dinfo->pixclock = var->pixclock;
1133 
1134     dinfo->info->fix.visual = dinfo->visual;
1135     dinfo->info->fix.line_length = dinfo->pitch;
1136 
1137     switch (dinfo->bpp) {
1138     case 8:
1139         dinfo->visual = FB_VISUAL_PSEUDOCOLOR;
1140         dinfo->pitch = var->xres_virtual;
1141         break;
1142     case 16:
1143         dinfo->visual = FB_VISUAL_TRUECOLOR;
1144         dinfo->pitch = var->xres_virtual * 2;
1145         break;
1146     case 32:
1147         dinfo->visual = FB_VISUAL_TRUECOLOR;
1148         dinfo->pitch = var->xres_virtual * 4;
1149         break;
1150     }
1151 
1152     /* Make sure the line length is a aligned correctly. */
1153     if (IS_I9XX(dinfo))
1154         dinfo->pitch = ROUND_UP_TO(dinfo->pitch, STRIDE_ALIGNMENT_I9XX);
1155     else
1156         dinfo->pitch = ROUND_UP_TO(dinfo->pitch, STRIDE_ALIGNMENT);
1157 
1158     if (FIXED_MODE(dinfo))
1159         dinfo->pitch = dinfo->initial_pitch;
1160 
1161     dinfo->info->screen_base = (char __iomem *)dinfo->fb.virtual;
1162     dinfo->info->fix.line_length = dinfo->pitch;
1163     dinfo->info->fix.visual = dinfo->visual;
1164 }
1165 
1166 /* fbops functions */
1167 
1168 /***************************************************************
1169  *                       fbdev interface                       *
1170  ***************************************************************/
1171 
1172 static int intelfb_open(struct fb_info *info, int user)
1173 {
1174     struct intelfb_info *dinfo = GET_DINFO(info);
1175 
1176     if (user)
1177         dinfo->open++;
1178 
1179     return 0;
1180 }
1181 
1182 static int intelfb_release(struct fb_info *info, int user)
1183 {
1184     struct intelfb_info *dinfo = GET_DINFO(info);
1185 
1186     if (user) {
1187         dinfo->open--;
1188         msleep(1);
1189         if (!dinfo->open)
1190             intelfbhw_disable_irq(dinfo);
1191     }
1192 
1193     return 0;
1194 }
1195 
1196 static int intelfb_check_var(struct fb_var_screeninfo *var,
1197                  struct fb_info *info)
1198 {
1199     int change_var = 0;
1200     struct fb_var_screeninfo v;
1201     struct intelfb_info *dinfo;
1202     static int first = 1;
1203     int i;
1204     /* Good pitches to allow tiling.  Don't care about pitches < 1024. */
1205     static const int pitches[] = {
1206         128 * 8,
1207         128 * 16,
1208         128 * 32,
1209         128 * 64,
1210         0
1211     };
1212 
1213     DBG_MSG("intelfb_check_var: accel_flags is %d\n", var->accel_flags);
1214 
1215     dinfo = GET_DINFO(info);
1216 
1217     /* update the pitch */
1218     if (intelfbhw_validate_mode(dinfo, var) != 0)
1219         return -EINVAL;
1220 
1221     v = *var;
1222 
1223     for (i = 0; pitches[i] != 0; i++) {
1224         if (pitches[i] >= v.xres_virtual) {
1225             v.xres_virtual = pitches[i];
1226             break;
1227         }
1228     }
1229 
1230     /* Check for a supported bpp. */
1231     if (v.bits_per_pixel <= 8)
1232         v.bits_per_pixel = 8;
1233     else if (v.bits_per_pixel <= 16) {
1234         if (v.bits_per_pixel == 16)
1235             v.green.length = 6;
1236         v.bits_per_pixel = 16;
1237     } else if (v.bits_per_pixel <= 32)
1238         v.bits_per_pixel = 32;
1239     else
1240         return -EINVAL;
1241 
1242     change_var = ((info->var.xres != var->xres) ||
1243               (info->var.yres != var->yres) ||
1244               (info->var.xres_virtual != var->xres_virtual) ||
1245               (info->var.yres_virtual != var->yres_virtual) ||
1246               (info->var.bits_per_pixel != var->bits_per_pixel) ||
1247               memcmp(&info->var.red, &var->red, sizeof(var->red)) ||
1248               memcmp(&info->var.green, &var->green,
1249                  sizeof(var->green)) ||
1250               memcmp(&info->var.blue, &var->blue, sizeof(var->blue)));
1251 
1252     if (FIXED_MODE(dinfo) &&
1253         (change_var ||
1254          var->yres_virtual > dinfo->initial_var.yres_virtual ||
1255          var->yres_virtual < dinfo->initial_var.yres ||
1256          var->xoffset || var->nonstd)) {
1257         if (first) {
1258             ERR_MSG("Changing the video mode is not supported.\n");
1259             first = 0;
1260         }
1261         return -EINVAL;
1262     }
1263 
1264     switch (intelfb_var_to_depth(&v)) {
1265     case 8:
1266         v.red.offset = v.green.offset = v.blue.offset = 0;
1267         v.red.length = v.green.length = v.blue.length = 8;
1268         v.transp.offset = v.transp.length = 0;
1269         break;
1270     case 15:
1271         v.red.offset = 10;
1272         v.green.offset = 5;
1273         v.blue.offset = 0;
1274         v.red.length = v.green.length = v.blue.length = 5;
1275         v.transp.offset = v.transp.length = 0;
1276         break;
1277     case 16:
1278         v.red.offset = 11;
1279         v.green.offset = 5;
1280         v.blue.offset = 0;
1281         v.red.length = 5;
1282         v.green.length = 6;
1283         v.blue.length = 5;
1284         v.transp.offset = v.transp.length = 0;
1285         break;
1286     case 24:
1287         v.red.offset = 16;
1288         v.green.offset = 8;
1289         v.blue.offset = 0;
1290         v.red.length = v.green.length = v.blue.length = 8;
1291         v.transp.offset = v.transp.length = 0;
1292         break;
1293     case 32:
1294         v.red.offset = 16;
1295         v.green.offset = 8;
1296         v.blue.offset = 0;
1297         v.red.length = v.green.length = v.blue.length = 8;
1298         v.transp.offset = 24;
1299         v.transp.length = 8;
1300         break;
1301     }
1302 
1303     if (v.xoffset > v.xres_virtual - v.xres)
1304         v.xoffset = v.xres_virtual - v.xres;
1305     if (v.yoffset > v.yres_virtual - v.yres)
1306         v.yoffset = v.yres_virtual - v.yres;
1307 
1308     v.red.msb_right = v.green.msb_right = v.blue.msb_right =
1309               v.transp.msb_right = 0;
1310 
1311         *var = v;
1312 
1313     return 0;
1314 }
1315 
1316 static int intelfb_set_par(struct fb_info *info)
1317 {
1318     struct intelfb_hwstate *hw;
1319         struct intelfb_info *dinfo = GET_DINFO(info);
1320 
1321     if (FIXED_MODE(dinfo)) {
1322         ERR_MSG("Changing the video mode is not supported.\n");
1323         return -EINVAL;
1324     }
1325 
1326     hw = kmalloc(sizeof(*hw), GFP_ATOMIC);
1327     if (!hw)
1328         return -ENOMEM;
1329 
1330     DBG_MSG("intelfb_set_par (%dx%d-%d)\n", info->var.xres,
1331         info->var.yres, info->var.bits_per_pixel);
1332 
1333     /*
1334      * Disable VCO prior to timing register change.
1335      */
1336     OUTREG(DPLL_A, INREG(DPLL_A) & ~DPLL_VCO_ENABLE);
1337 
1338     intelfb_blank(FB_BLANK_POWERDOWN, info);
1339 
1340     if (ACCEL(dinfo, info))
1341         intelfbhw_2d_stop(dinfo);
1342 
1343     memcpy(hw, &dinfo->save_state, sizeof(*hw));
1344     if (intelfbhw_mode_to_hw(dinfo, hw, &info->var))
1345         goto invalid_mode;
1346     if (intelfbhw_program_mode(dinfo, hw, 0))
1347         goto invalid_mode;
1348 
1349 #if REGDUMP > 0
1350     intelfbhw_read_hw_state(dinfo, hw, 0);
1351     intelfbhw_print_hw_state(dinfo, hw);
1352 #endif
1353 
1354     update_dinfo(dinfo, &info->var);
1355 
1356     if (ACCEL(dinfo, info))
1357         intelfbhw_2d_start(dinfo);
1358 
1359     intelfb_pan_display(&info->var, info);
1360 
1361     intelfb_blank(FB_BLANK_UNBLANK, info);
1362 
1363     if (ACCEL(dinfo, info)) {
1364         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
1365         FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1366         FBINFO_HWACCEL_IMAGEBLIT;
1367     } else
1368         info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
1369 
1370     kfree(hw);
1371     return 0;
1372 invalid_mode:
1373     kfree(hw);
1374     return -EINVAL;
1375 }
1376 
1377 static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
1378                  unsigned blue, unsigned transp,
1379                  struct fb_info *info)
1380 {
1381     struct intelfb_info *dinfo = GET_DINFO(info);
1382 
1383 #if VERBOSE > 0
1384     DBG_MSG("intelfb_setcolreg: regno %d, depth %d\n", regno, dinfo->depth);
1385 #endif
1386 
1387     if (regno > 255)
1388         return 1;
1389 
1390     if (dinfo->depth == 8) {
1391         red >>= 8;
1392         green >>= 8;
1393         blue >>= 8;
1394 
1395         intelfbhw_setcolreg(dinfo, regno, red, green, blue,
1396                     transp);
1397     }
1398 
1399     if (regno < 16) {
1400         switch (dinfo->depth) {
1401         case 15:
1402             dinfo->pseudo_palette[regno] = ((red & 0xf800) >>  1) |
1403                 ((green & 0xf800) >>  6) |
1404                 ((blue & 0xf800) >> 11);
1405             break;
1406         case 16:
1407             dinfo->pseudo_palette[regno] = (red & 0xf800) |
1408                 ((green & 0xfc00) >>  5) |
1409                 ((blue  & 0xf800) >> 11);
1410             break;
1411         case 24:
1412             dinfo->pseudo_palette[regno] = ((red & 0xff00) << 8) |
1413                 (green & 0xff00) |
1414                 ((blue  & 0xff00) >> 8);
1415             break;
1416         }
1417     }
1418 
1419     return 0;
1420 }
1421 
1422 static int intelfb_blank(int blank, struct fb_info *info)
1423 {
1424     intelfbhw_do_blank(blank, info);
1425     return 0;
1426 }
1427 
1428 static int intelfb_pan_display(struct fb_var_screeninfo *var,
1429                    struct fb_info *info)
1430 {
1431     intelfbhw_pan_display(var, info);
1432     return 0;
1433 }
1434 
1435 /* When/if we have our own ioctls. */
1436 static int intelfb_ioctl(struct fb_info *info, unsigned int cmd,
1437              unsigned long arg)
1438 {
1439     int retval = 0;
1440     struct intelfb_info *dinfo = GET_DINFO(info);
1441     u32 pipe = 0;
1442 
1443     switch (cmd) {
1444         case FBIO_WAITFORVSYNC:
1445             if (get_user(pipe, (__u32 __user *)arg))
1446                 return -EFAULT;
1447 
1448             retval = intelfbhw_wait_for_vsync(dinfo, pipe);
1449             break;
1450         default:
1451             break;
1452     }
1453 
1454     return retval;
1455 }
1456 
1457 static void intelfb_fillrect (struct fb_info *info,
1458                   const struct fb_fillrect *rect)
1459 {
1460         struct intelfb_info *dinfo = GET_DINFO(info);
1461     u32 rop, color;
1462 
1463 #if VERBOSE > 0
1464     DBG_MSG("intelfb_fillrect\n");
1465 #endif
1466 
1467     if (!ACCEL(dinfo, info) || dinfo->depth == 4) {
1468         cfb_fillrect(info, rect);
1469         return;
1470     }
1471 
1472     if (rect->rop == ROP_COPY)
1473         rop = PAT_ROP_GXCOPY;
1474     else /* ROP_XOR */
1475         rop = PAT_ROP_GXXOR;
1476 
1477     if (dinfo->depth != 8)
1478         color = dinfo->pseudo_palette[rect->color];
1479     else
1480         color = rect->color;
1481 
1482     intelfbhw_do_fillrect(dinfo, rect->dx, rect->dy,
1483                   rect->width, rect->height, color,
1484                   dinfo->pitch, info->var.bits_per_pixel,
1485                   rop);
1486 }
1487 
1488 static void intelfb_copyarea(struct fb_info *info,
1489                  const struct fb_copyarea *region)
1490 {
1491         struct intelfb_info *dinfo = GET_DINFO(info);
1492 
1493 #if VERBOSE > 0
1494     DBG_MSG("intelfb_copyarea\n");
1495 #endif
1496 
1497     if (!ACCEL(dinfo, info) || dinfo->depth == 4) {
1498         cfb_copyarea(info, region);
1499         return;
1500     }
1501 
1502     intelfbhw_do_bitblt(dinfo, region->sx, region->sy, region->dx,
1503                 region->dy, region->width, region->height,
1504                 dinfo->pitch, info->var.bits_per_pixel);
1505 }
1506 
1507 static void intelfb_imageblit(struct fb_info *info,
1508                   const struct fb_image *image)
1509 {
1510         struct intelfb_info *dinfo = GET_DINFO(info);
1511     u32 fgcolor, bgcolor;
1512 
1513 #if VERBOSE > 0
1514     DBG_MSG("intelfb_imageblit\n");
1515 #endif
1516 
1517     if (!ACCEL(dinfo, info) || dinfo->depth == 4
1518         || image->depth != 1) {
1519         cfb_imageblit(info, image);
1520         return;
1521     }
1522 
1523     if (dinfo->depth != 8) {
1524         fgcolor = dinfo->pseudo_palette[image->fg_color];
1525         bgcolor = dinfo->pseudo_palette[image->bg_color];
1526     } else {
1527         fgcolor = image->fg_color;
1528         bgcolor = image->bg_color;
1529     }
1530 
1531     if (!intelfbhw_do_drawglyph(dinfo, fgcolor, bgcolor, image->width,
1532                     image->height, image->data,
1533                     image->dx, image->dy,
1534                     dinfo->pitch, info->var.bits_per_pixel)) {
1535         cfb_imageblit(info, image);
1536         return;
1537     }
1538 }
1539 
1540 static int intelfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1541 {
1542         struct intelfb_info *dinfo = GET_DINFO(info);
1543     u32 physical;
1544 #if VERBOSE > 0
1545     DBG_MSG("intelfb_cursor\n");
1546 #endif
1547 
1548     if (!dinfo->hwcursor)
1549         return -ENODEV;
1550 
1551     intelfbhw_cursor_hide(dinfo);
1552 
1553     /* If XFree killed the cursor - restore it */
1554     physical = (dinfo->mobile || IS_I9XX(dinfo)) ? dinfo->cursor.physical :
1555            (dinfo->cursor.offset << 12);
1556 
1557     if (INREG(CURSOR_A_BASEADDR) != physical) {
1558         u32 fg, bg;
1559 
1560         DBG_MSG("the cursor was killed - restore it !!\n");
1561         DBG_MSG("size %d, %d   pos %d, %d\n",
1562             cursor->image.width, cursor->image.height,
1563             cursor->image.dx, cursor->image.dy);
1564 
1565         intelfbhw_cursor_init(dinfo);
1566         intelfbhw_cursor_reset(dinfo);
1567         intelfbhw_cursor_setpos(dinfo, cursor->image.dx,
1568                     cursor->image.dy);
1569 
1570         if (dinfo->depth != 8) {
1571             fg =dinfo->pseudo_palette[cursor->image.fg_color];
1572             bg =dinfo->pseudo_palette[cursor->image.bg_color];
1573         } else {
1574             fg = cursor->image.fg_color;
1575             bg = cursor->image.bg_color;
1576         }
1577         intelfbhw_cursor_setcolor(dinfo, bg, fg);
1578         intelfbhw_cursor_load(dinfo, cursor->image.width,
1579                       cursor->image.height,
1580                       dinfo->cursor_src);
1581 
1582         if (cursor->enable)
1583             intelfbhw_cursor_show(dinfo);
1584         return 0;
1585     }
1586 
1587     if (cursor->set & FB_CUR_SETPOS) {
1588         u32 dx, dy;
1589 
1590         dx = cursor->image.dx - info->var.xoffset;
1591         dy = cursor->image.dy - info->var.yoffset;
1592 
1593         intelfbhw_cursor_setpos(dinfo, dx, dy);
1594     }
1595 
1596     if (cursor->set & FB_CUR_SETSIZE) {
1597         if (cursor->image.width > 64 || cursor->image.height > 64)
1598             return -ENXIO;
1599 
1600         intelfbhw_cursor_reset(dinfo);
1601     }
1602 
1603     if (cursor->set & FB_CUR_SETCMAP) {
1604         u32 fg, bg;
1605 
1606         if (dinfo->depth != 8) {
1607             fg = dinfo->pseudo_palette[cursor->image.fg_color];
1608             bg = dinfo->pseudo_palette[cursor->image.bg_color];
1609         } else {
1610             fg = cursor->image.fg_color;
1611             bg = cursor->image.bg_color;
1612         }
1613 
1614         intelfbhw_cursor_setcolor(dinfo, bg, fg);
1615     }
1616 
1617     if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
1618         u32 s_pitch = (ROUND_UP_TO(cursor->image.width, 8) / 8);
1619         u32 size = s_pitch * cursor->image.height;
1620         u8 *dat = (u8 *) cursor->image.data;
1621         u8 *msk = (u8 *) cursor->mask;
1622         u8 src[64];
1623         u32 i;
1624 
1625         if (cursor->image.depth != 1)
1626             return -ENXIO;
1627 
1628         switch (cursor->rop) {
1629         case ROP_XOR:
1630             for (i = 0; i < size; i++)
1631                 src[i] = dat[i] ^ msk[i];
1632             break;
1633         case ROP_COPY:
1634         default:
1635             for (i = 0; i < size; i++)
1636                 src[i] = dat[i] & msk[i];
1637             break;
1638         }
1639 
1640         /* save the bitmap to restore it when XFree will
1641            make the cursor dirty */
1642         memcpy(dinfo->cursor_src, src, size);
1643 
1644         intelfbhw_cursor_load(dinfo, cursor->image.width,
1645                       cursor->image.height, src);
1646     }
1647 
1648     if (cursor->enable)
1649         intelfbhw_cursor_show(dinfo);
1650 
1651     return 0;
1652 }
1653 
1654 static int intelfb_sync(struct fb_info *info)
1655 {
1656         struct intelfb_info *dinfo = GET_DINFO(info);
1657 
1658 #if VERBOSE > 0
1659     DBG_MSG("intelfb_sync\n");
1660 #endif
1661 
1662     if (dinfo->ring_lockup)
1663         return 0;
1664 
1665     intelfbhw_do_sync(dinfo);
1666     return 0;
1667 }
1668
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