i810_main.c

h内核

			par->cursor_heap.offset);

	info->fbops->fb_blank(VESA_NO_BLANKING, info);

	par->cur_state = 0;

	return 0;
}
/***********************************************************************
 *                  AGP resource allocation                            *
 ***********************************************************************/
  
static void __devinit i810_fix_pointers(struct i810fb_par *par)
{
      	par->fb.physical = par->aperture.physical+(par->fb.offset << 12);
	par->fb.virtual = par->aperture.virtual+(par->fb.offset << 12);
	par->iring.physical = par->aperture.physical + 
		(par->iring.offset << 12);
	par->iring.virtual = par->aperture.virtual + 
		(par->iring.offset << 12);
	par->cursor_heap.virtual = par->aperture.virtual+
		(par->cursor_heap.offset << 12);
}

static void __devinit i810_fix_offsets(struct i810fb_par *par)
{
	if (vram + 1 > par->aperture.size >> 20)
		vram = (par->aperture.size >> 20) - 1;
	if (v_offset_default > (par->aperture.size >> 20))
		v_offset_default = (par->aperture.size >> 20);
	if (vram + v_offset_default + 1 > par->aperture.size >> 20)
		v_offset_default = (par->aperture.size >> 20) - (vram + 1);

	par->fb.size = vram << 20;
	par->fb.offset = v_offset_default << 20;
	par->fb.offset >>= 12;

	par->iring.offset = par->fb.offset + (par->fb.size >> 12);
	par->iring.size = RINGBUFFER_SIZE;

	par->cursor_heap.offset = par->iring.offset + (RINGBUFFER_SIZE >> 12);
	par->cursor_heap.size = 4096;
}

static int __devinit i810_alloc_agp_mem(struct fb_info *info)
{
	struct i810fb_par *par = (struct i810fb_par *) info->par;
	int size;
	
	i810_fix_offsets(par);
	size = par->fb.size + par->iring.size;

	if (agp_backend_acquire()) {
		printk("i810fb_alloc_fbmem: cannot acquire agpgart\n");
		return -ENODEV;
	}
	if (!(par->i810_gtt.i810_fb_memory = 
	      agp_allocate_memory(size >> 12, AGP_NORMAL_MEMORY))) {
		printk("i810fb_alloc_fbmem: can't allocate framebuffer "
		       "memory\n");
		agp_backend_release();
		return -ENOMEM;
	}
	if (agp_bind_memory(par->i810_gtt.i810_fb_memory,
			    par->fb.offset)) {
		printk("i810fb_alloc_fbmem: can't bind framebuffer memory\n");
		agp_backend_release();
		return -EBUSY;
	}	
	
	if (!(par->i810_gtt.i810_cursor_memory = 
	      agp_allocate_memory(par->cursor_heap.size >> 12,
				  AGP_PHYSICAL_MEMORY))) {
		printk("i810fb_alloc_cursormem:  can't allocate" 
		       "cursor memory\n");
		agp_backend_release();
		return -ENOMEM;
	}
	if (agp_bind_memory(par->i810_gtt.i810_cursor_memory,
			    par->cursor_heap.offset)) {
		printk("i810fb_alloc_cursormem: cannot bind cursor memory\n");
		agp_backend_release();
		return -EBUSY;
	}	

	par->cursor_heap.physical = par->i810_gtt.i810_cursor_memory->physical;

	i810_fix_pointers(par);

	agp_backend_release();

	return 0;
}

/*************************************************************** 
 *                    Initialization                           * 
 ***************************************************************/

/**
 * i810_init_monspecs
 * @info: pointer to device specific info structure
 *
 * DESCRIPTION:
 * Sets the the user monitor's horizontal and vertical
 * frequency limits
 */
static void __devinit i810_init_monspecs(struct fb_info *info)
{
	if (!hsync1)
		hsync1 = HFMIN;
	if (!hsync2) 
		hsync2 = HFMAX;
	if (!info->monspecs.hfmax)
		info->monspecs.hfmax = hsync2;
	if (!info->monspecs.hfmin)
		info->monspecs.hfmin = hsync1;
	if (hsync2 < hsync1)
		info->monspecs.hfmin = hsync2;

	if (!vsync1)
		vsync1 = VFMIN;
	if (!vsync2) 
		vsync2 = VFMAX;
	if (IS_DVT && vsync1 < 60)
		vsync1 = 60;
	if (!info->monspecs.vfmax)
		info->monspecs.vfmax = vsync2;
	if (!info->monspecs.vfmin)
		info->monspecs.vfmin = vsync1;
	if (vsync2 < vsync1) 
		info->monspecs.vfmin = vsync2;
}

/**
 * i810_init_defaults - initializes default values to use
 * @par: pointer to i810fb_par structure
 * @info: pointer to current fb_info structure
 */
static void __devinit i810_init_defaults(struct i810fb_par *par, 
				      struct fb_info *info)
{
	if (voffset) 
		v_offset_default = voffset;
	else if (par->aperture.size > 32 * 1024 * 1024)
		v_offset_default = 16;
	else
		v_offset_default = 8;

	if (!vram) 
		vram = 1;

	if (accel) 
		par->dev_flags |= HAS_ACCELERATION;

	if (sync) 
		par->dev_flags |= ALWAYS_SYNC;

	if (bpp < 8)
		bpp = 8;
	
	if (!vyres) 
		vyres = (vram << 20)/(xres*bpp >> 3);

	par->i810fb_ops = i810fb_ops;
	info->var.xres = xres;
	info->var.yres = yres;
	info->var.yres_virtual = vyres;
	info->var.bits_per_pixel = bpp;

	if (dcolor)
		info->var.nonstd = 1;

	if (par->dev_flags & HAS_ACCELERATION) 
		info->var.accel_flags = 1;

	i810_init_monspecs(info);
}
	
/**
 * i810_init_device - initialize device
 * @par: pointer to i810fb_par structure
 */
static void __devinit i810_init_device(struct i810fb_par *par)
{
	u8 reg;
	u8 __iomem *mmio = par->mmio_start_virtual;

	if (mtrr) set_mtrr(par);

	i810_init_cursor(par);

	/* mvo: enable external vga-connector (for laptops) */
	if (ext_vga) {
		i810_writel(HVSYNC, mmio, 0);
		i810_writel(PWR_CLKC, mmio, 3);
	}

	pci_read_config_byte(par->dev, 0x50, &reg);
	reg &= FREQ_MASK;
	par->mem_freq = (reg) ? 133 : 100;

}

static int __devinit 
i810_allocate_pci_resource(struct i810fb_par *par, 
			   const struct pci_device_id *entry)
{
	int err;

	if ((err = pci_enable_device(par->dev))) { 
		printk("i810fb_init: cannot enable device\n");
		return err;		
	}
	par->res_flags |= PCI_DEVICE_ENABLED;

	if (pci_resource_len(par->dev, 0) > 512 * 1024) {
		par->aperture.physical = pci_resource_start(par->dev, 0);
		par->aperture.size = pci_resource_len(par->dev, 0);
		par->mmio_start_phys = pci_resource_start(par->dev, 1);
	} else {
		par->aperture.physical = pci_resource_start(par->dev, 1);
		par->aperture.size = pci_resource_len(par->dev, 1);
		par->mmio_start_phys = pci_resource_start(par->dev, 0);
	}
	if (!par->aperture.size) {
		printk("i810fb_init: device is disabled\n");
		return -ENOMEM;
	}

	if (!request_mem_region(par->aperture.physical, 
				par->aperture.size, 
				i810_pci_list[entry->driver_data])) {
		printk("i810fb_init: cannot request framebuffer region\n");
		return -ENODEV;
	}
	par->res_flags |= FRAMEBUFFER_REQ;

	par->aperture.virtual = ioremap_nocache(par->aperture.physical, 
					par->aperture.size);
	if (!par->aperture.virtual) {
		printk("i810fb_init: cannot remap framebuffer region\n");
		return -ENODEV;
	}
  
	if (!request_mem_region(par->mmio_start_phys, 
				MMIO_SIZE, 
				i810_pci_list[entry->driver_data])) {
		printk("i810fb_init: cannot request mmio region\n");
		return -ENODEV;
	}
	par->res_flags |= MMIO_REQ;

	par->mmio_start_virtual = ioremap_nocache(par->mmio_start_phys, 
						  MMIO_SIZE);
	if (!par->mmio_start_virtual) {
		printk("i810fb_init: cannot remap mmio region\n");
		return -ENODEV;
	}

	return 0;
}
	
int __init i810fb_setup(char *options)
{
	char *this_opt, *suffix = NULL;

	if (!options || !*options)
		return 0;
	
	while ((this_opt = strsep(&options, ",")) != NULL) {
		if (!strncmp(this_opt, "mtrr", 4))
			mtrr = 1;
		else if (!strncmp(this_opt, "accel", 5))
			accel = 1;
		else if (!strncmp(this_opt, "ext_vga", 7))
			ext_vga = 1;
		else if (!strncmp(this_opt, "sync", 4))
			sync = 1;
		else if (!strncmp(this_opt, "vram:", 5))
			vram = (simple_strtoul(this_opt+5, NULL, 0));
		else if (!strncmp(this_opt, "voffset:", 8))
			voffset = (simple_strtoul(this_opt+8, NULL, 0));
		else if (!strncmp(this_opt, "xres:", 5))
			xres = simple_strtoul(this_opt+5, NULL, 0);
		else if (!strncmp(this_opt, "yres:", 5))
			yres = simple_strtoul(this_opt+5, NULL, 0);
		else if (!strncmp(this_opt, "vyres:", 6))
			vyres = simple_strtoul(this_opt+6, NULL, 0);
		else if (!strncmp(this_opt, "bpp:", 4))
			bpp = simple_strtoul(this_opt+4, NULL, 0);
		else if (!strncmp(this_opt, "hsync1:", 7)) {
			hsync1 = simple_strtoul(this_opt+7, &suffix, 0);
			if (strncmp(suffix, "H", 1)) 
				hsync1 *= 1000;
		} else if (!strncmp(this_opt, "hsync2:", 7)) {
			hsync2 = simple_strtoul(this_opt+7, &suffix, 0);
			if (strncmp(suffix, "H", 1)) 
				hsync2 *= 1000;
		} else if (!strncmp(this_opt, "vsync1:", 7)) 
			vsync1 = simple_strtoul(this_opt+7, NULL, 0);
		else if (!strncmp(this_opt, "vsync2:", 7))
			vsync2 = simple_strtoul(this_opt+7, NULL, 0);
		else if (!strncmp(this_opt, "dcolor", 6))
			dcolor = 1;
	}
	return 0;
}

static int __devinit i810fb_init_pci (struct pci_dev *dev, 
				   const struct pci_device_id *entry)
{
	struct fb_info    *info;
	struct i810fb_par *par = NULL;
	int i, err = -1, vfreq, hfreq, pixclock;

	i = 0;

	info = framebuffer_alloc(sizeof(struct i810fb_par), &dev->dev);
	if (!info)
		return -ENOMEM;

	par = (struct i810fb_par *) info->par;
	par->dev = dev;

	if (!(info->pixmap.addr = kmalloc(8*1024, GFP_KERNEL))) {
		i810fb_release_resource(info, par);
		return -ENOMEM;
	}
	memset(info->pixmap.addr, 0, 8*1024);
	info->pixmap.size = 8*1024;
	info->pixmap.buf_align = 8;
	info->pixmap.flags = FB_PIXMAP_SYSTEM;

	if ((err = i810_allocate_pci_resource(par, entry))) {
		i810fb_release_resource(info, par);
		return err;
	}

	i810_init_defaults(par, info);

	if ((err = i810_alloc_agp_mem(info))) {
		i810fb_release_resource(info, par);
		return err;
	}

	i810_init_device(par);        

	info->screen_base = par->fb.virtual;
	info->fbops = &par->i810fb_ops;
	info->pseudo_palette = par->pseudo_palette;
	fb_alloc_cmap(&info->cmap, 256, 0);

	if ((err = info->fbops->fb_check_var(&info->var, info))) {
		i810fb_release_resource(info, par);
		return err;
	}
	encode_fix(&info->fix, info); 
	 	    
	i810fb_init_ringbuffer(info);
	err = register_framebuffer(info);
	if (err < 0) {
    		i810fb_release_resource(info, par); 
		printk("i810fb_init: cannot register framebuffer device\n");
    		return err;  
    	}   

	pci_set_drvdata(dev, info);
	pixclock = 1000000000/(info->var.pixclock);
	pixclock *= 1000;
	hfreq = pixclock/(info->var.xres + info->var.left_margin + 
			  info->var.hsync_len + info->var.right_margin);
	vfreq = hfreq/(info->var.yres + info->var.upper_margin +
		       info->var.vsync_len + info->var.lower_margin);

      	printk("I810FB: fb%d         : %s v%d.%d.%d%s\n"
      	       "I810FB: Video RAM   : %dK\n" 
	       "I810FB: Monitor     : H: %d-%d KHz V: %d-%d Hz\n"
	       "I810FB: Mode        : %dx%d-%dbpp@%dHz\n",
	       info->node,
	       i810_pci_list[entry->driver_data],
	       VERSION_MAJOR, VERSION_MINOR, VERSION_TEENIE, BRANCH_VERSION,
	       (int) par->fb.size>>10, info->monspecs.hfmin/1000,
	       info->monspecs.hfmax/1000, info->monspecs.vfmin,
	       info->monspecs.vfmax, info->var.xres, 
	       info->var.yres, info->var.bits_per_pixel, vfreq);
	return 0;
}

/***************************************************************
 *                     De-initialization                        *
 ***************************************************************/

static void i810fb_release_resource(struct fb_info *info, 
				    struct i810fb_par *par)
{
	struct gtt_data *gtt = &par->i810_gtt;
	unset_mtrr(par);

	if (par->i810_gtt.i810_cursor_memory)
		agp_free_memory(gtt->i810_cursor_memory);
	if (par->i810_gtt.i810_fb_memory)
		agp_free_memory(gtt->i810_fb_memory);

	if (par->mmio_start_virtual)
		iounmap(par->mmio_start_virtual);
	if (par->aperture.virtual)
		iounmap(par->aperture.virtual);

	if (par->res_flags & FRAMEBUFFER_REQ)
		release_mem_region(par->aperture.physical,
				   par->aperture.size);
	if (par->res_flags & MMIO_REQ)
		release_mem_region(par->mmio_start_phys, MMIO_SIZE);

	if (par->res_flags & PCI_DEVICE_ENABLED)
		pci_disable_device(par->dev);

	framebuffer_release(info);

}

static void __exit i810fb_remove_pci(struct pci_dev *dev)
{
	struct fb_info *info = pci_get_drvdata(dev);
	struct i810fb_par *par = (struct i810fb_par *) info->par;

	unregister_framebuffer(info);  
	i810fb_release_resource(info, par);
	pci_set_drvdata(dev, NULL);
	printk("cleanup_module:  unloaded i810 framebuffer device\n");
}                                                	

#ifndef MODULE
int __init i810fb_init(void)
{
	char *option = NULL;

	if (fb_get_options("i810fb", &option))
		return -ENODEV;
	i810fb_setup(option);

	return pci_register_driver(&i810fb_driver);
}
#endif 

/*********************************************************************
 *                          Modularization                           *
 *********************************************************************/

#ifdef MODULE

int __init i810fb_init(void)
{
	hsync1 *= 1000;
	hsync2 *= 1000;

	return pci_register_driver(&i810fb_driver);
}

module_param(vram, int, 0);
MODULE_PARM_DESC(vram, "System RAM to allocate to framebuffer in MiB" 
		 " (default=4)");
module_param(voffset, int, 0);
MODULE_PARM_DESC(voffset, "at what offset to place start of framebuffer "
                 "memory (0 to maximum aperture size), in MiB (default = 48)");
module_param(bpp, int, 0);
MODULE_PARM_DESC(bpp, "Color depth for display in bits per pixel"
		 " (default = 8)");
module_param(xres, int, 0);
MODULE_PARM_DESC(xres, "Horizontal resolution in pixels (default = 640)");
module_param(yres, int, 0);
MODULE_PARM_DESC(yres, "Vertical resolution in scanlines (default = 480)");
module_param(vyres,int, 0);
MODULE_PARM_DESC(vyres, "Virtual vertical resolution in scanlines"
		 " (default = 480)");
module_param(hsync1, int, 0);
MODULE_PARM_DESC(hsync1, "Minimum horizontal frequency of monitor in KHz"
		 " (default = 31)");
module_param(hsync2, int, 0);
MODULE_PARM_DESC(hsync2, "Maximum horizontal frequency of monitor in KHz"
		 " (default = 31)");
module_param(vsync1, int, 0);
MODULE_PARM_DESC(vsync1, "Minimum vertical frequency of monitor in Hz"
		 " (default = 50)");
module_param(vsync2, int, 0);
MODULE_PARM_DESC(vsync2, "Maximum vertical frequency of monitor in Hz" 
		 " (default = 60)");
module_param(accel, bool, 0);
MODULE_PARM_DESC(accel, "Use Acceleration (BLIT) engine (default = 0)");
module_param(mtrr, bool, 0);
MODULE_PARM_DESC(mtrr, "Use MTRR (default = 0)");
module_param(ext_vga, bool, 0);
MODULE_PARM_DESC(ext_vga, "Enable external VGA connector (default = 0)");
module_param(sync, bool, 0);
MODULE_PARM_DESC(sync, "wait for accel engine to finish drawing"
		 " (default = 0)");
module_param(dcolor, bool, 0);
MODULE_PARM_DESC(dcolor, "use DirectColor visuals"
		 " (default = 0 = TrueColor)");

MODULE_AUTHOR("Tony A. Daplas");
MODULE_DESCRIPTION("Framebuffer device for the Intel 810/815 and"
		   " compatible cards");
MODULE_LICENSE("GPL"); 

static void __exit i810fb_exit(void)
{
	pci_unregister_driver(&i810fb_driver);
}
module_exit(i810fb_exit);

#endif /* MODULE */

module_init(i810fb_init);