drivers/video/i810/i810_main.h

   1 /*-*- linux-c -*-
   2  *  linux/drivers/video/i810fb_main.h -- Intel 810 frame buffer device
   3  *                                       main header file
   4  *
   5  *      Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
   6  *      All Rights Reserved
   7  *
   8  *
   9  *  This file is subject to the terms and conditions of the GNU General Public
  10  *  License. See the file COPYING in the main directory of this archive for
  11  *  more details.
  12  */
  13
  14 #ifndef __I810_MAIN_H__
  15 #define __I810_MAIN_H__
  16
  17 static int  __devinit i810fb_init_pci (struct pci_dev *dev,
  18                                        const struct pci_device_id *entry);
  19 static void __exit i810fb_remove_pci(struct pci_dev *dev);
  20 static int i810fb_resume(struct pci_dev *dev);
  21 static int i810fb_suspend(struct pci_dev *dev, pm_message_t state);
  22
  23 /*
  24  * voffset - framebuffer offset in MiB from aperture start address.  In order for
  25  * the driver to work with X, we must try to use memory holes left untouched by X. The
  26  * following table lists where X's different surfaces start at.
  27  *
  28  * ---------------------------------------------
  29  * :                :  64 MiB     : 32 MiB      :
  30  * ----------------------------------------------
  31  * : FrontBuffer    :   0         :  0          :
  32  * : DepthBuffer    :   48        :  16         :
  33  * : BackBuffer     :   56        :  24         :
  34  * ----------------------------------------------
  35  *
  36  * So for chipsets with 64 MiB Aperture sizes, 32 MiB for v_offset is okay, allowing up to
  37  * 15 + 1 MiB of Framebuffer memory.  For 32 MiB Aperture sizes, a v_offset of 8 MiB should
  38  * work, allowing 7 + 1 MiB of Framebuffer memory.
  39  * Note, the size of the hole may change depending on how much memory you allocate to X,
  40  * and how the memory is split up between these surfaces.
  41  *
  42  * Note: Anytime the DepthBuffer or FrontBuffer is overlapped, X would still run but with
  43  * DRI disabled.  But if the Frontbuffer is overlapped, X will fail to load.
  44  *
  45  * Experiment with v_offset to find out which works best for you.
  46  */
  47 static u32 v_offset_default __initdata; /* For 32 MiB Aper size, 8 should be the default */
  48 static u32 voffset          __initdata = 0;
  49
  50 static int i810fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
  51
  52 /* Chipset Specific Functions */
  53 static int i810fb_set_par    (struct fb_info *info);
  54 static int i810fb_getcolreg  (u8 regno, u8 *red, u8 *green, u8 *blue,
  55                               u8 *transp, struct fb_info *info);
  56 static int i810fb_setcolreg  (unsigned regno, unsigned red, unsigned green, unsigned blue,
  57                               unsigned transp, struct fb_info *info);
  58 static int i810fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
  59 static int i810fb_blank      (int blank_mode, struct fb_info *info);
  60
  61 /* Initialization */
  62 static void i810fb_release_resource       (struct fb_info *info, struct i810fb_par *par);
  63 extern int __init agp_intel_init(void);
  64
  65
  66 /* Video Timings */
  67 extern void round_off_xres         (u32 *xres);
  68 extern void round_off_yres         (u32 *xres, u32 *yres);
  69 extern u32 i810_get_watermark      (const struct fb_var_screeninfo *var,
  70                                     struct i810fb_par *par);
  71 extern void i810fb_encode_registers(const struct fb_var_screeninfo *var,
  72                                     struct i810fb_par *par, u32 xres, u32 yres);
  73 extern void i810fb_fill_var_timings(struct fb_var_screeninfo *var);
  74
  75 /* Accelerated Functions */
  76 extern void i810fb_fillrect (struct fb_info *p,
  77                              const struct fb_fillrect *rect);
  78 extern void i810fb_copyarea (struct fb_info *p,
  79                              const struct fb_copyarea *region);
  80 extern void i810fb_imageblit(struct fb_info *p, const struct fb_image *image);
  81 extern int  i810fb_sync     (struct fb_info *p);
  82
  83 extern void i810fb_init_ringbuffer(struct fb_info *info);
  84 extern void i810fb_load_front     (u32 offset, struct fb_info *info);
  85
  86 #ifdef CONFIG_FB_I810_I2C
  87 /* I2C */
  88 extern int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid,
  89                                     int conn);
  90 extern void i810_create_i2c_busses(struct i810fb_par *par);
  91 extern void i810_delete_i2c_busses(struct i810fb_par *par);
  92 #else
  93 static inline int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid,
  94                                     int conn)
  95 {
  96         return 1;
  97 }
  98 static inline void i810_create_i2c_busses(struct i810fb_par *par) { }
  99 static inline void i810_delete_i2c_busses(struct i810fb_par *par) { }
 100 #endif
 101
 102 /* Conditionals */
 103 #ifdef CONFIG_X86
 104 inline void flush_cache(void)
 105 {
 106         asm volatile ("wbinvd":::"memory");
 107 }
 108 #else
 109 #define flush_cache() do { } while(0)
 110 #endif
 111
 112 #ifdef CONFIG_MTRR
 113 #define KERNEL_HAS_MTRR 1
 114 static inline void __devinit set_mtrr(struct i810fb_par *par)
 115 {
 116         par->mtrr_reg = mtrr_add((u32) par->aperture.physical,
 117                  par->aperture.size, MTRR_TYPE_WRCOMB, 1);
 118         if (par->mtrr_reg < 0) {
 119                 printk(KERN_ERR "set_mtrr: unable to set MTRR\n");
 120                 return;
 121         }
 122         par->dev_flags |= HAS_MTRR;
 123 }
 124 static inline void unset_mtrr(struct i810fb_par *par)
 125 {
 126         if (par->dev_flags & HAS_MTRR)
 127                 mtrr_del(par->mtrr_reg, (u32) par->aperture.physical,
 128                          par->aperture.size);
 129 }
 130 #else
 131 #define KERNEL_HAS_MTRR 0
 132 #define set_mtrr(x) printk("set_mtrr: MTRR is disabled in the kernel\n")
 133
 134 #define unset_mtrr(x) do { } while (0)
 135 #endif /* CONFIG_MTRR */
 136
 137 #ifdef CONFIG_FB_I810_GTF
 138 #define IS_DVT (0)
 139 #else
 140 #define IS_DVT (1)
 141 #endif
 142
 143 #endif /* __I810_MAIN_H__ */