[net-next-2.6.git] / drivers / video / vesafb.c

/*
 * framebuffer driver for VBE 2.0 compliant graphic boards
 *
 * switching to graphics mode happens at boot time (while
 * running in real mode, see arch/i386/boot/video.S).
 *
 * (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>

#include <video/vga.h>
#include <asm/io.h>
#include <asm/mtrr.h>

#define dac_reg	(0x3c8)
#define dac_val	(0x3c9)

/* --------------------------------------------------------------------- */

static struct fb_var_screeninfo vesafb_defined __initdata = {
	.activate	= FB_ACTIVATE_NOW,
	.height		= -1,
	.width		= -1,
	.right_margin	= 32,
	.upper_margin	= 16,
	.lower_margin	= 4,
	.vsync_len	= 4,
	.vmode		= FB_VMODE_NONINTERLACED,
};

static struct fb_fix_screeninfo vesafb_fix __initdata = {
	.id	= "VESA VGA",
	.type	= FB_TYPE_PACKED_PIXELS,
	.accel	= FB_ACCEL_NONE,
};

static int   inverse    __read_mostly;
static int   mtrr       __read_mostly;		/* disable mtrr */
static int   vram_remap __initdata;		/* Set amount of memory to be used */
static int   vram_total __initdata;		/* Set total amount of memory */
static int   pmi_setpal __read_mostly = 1;	/* pmi for palette changes ??? */
static int   ypan       __read_mostly;		/* 0..nothing, 1..ypan, 2..ywrap */
static void  (*pmi_start)(void) __read_mostly;
static void  (*pmi_pal)  (void) __read_mostly;
static int   depth      __read_mostly;
static int   vga_compat __read_mostly;
/* --------------------------------------------------------------------- */

static int vesafb_pan_display(struct fb_var_screeninfo *var,
                              struct fb_info *info)
{
#ifdef __i386__
	int offset;

	offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;

        __asm__ __volatile__(
                "call *(%%edi)"
                : /* no return value */
                : "a" (0x4f07),         /* EAX */
                  "b" (0),              /* EBX */
                  "c" (offset),         /* ECX */
                  "d" (offset >> 16),   /* EDX */
                  "D" (&pmi_start));    /* EDI */
#endif
	return 0;
}

static int vesa_setpalette(int regno, unsigned red, unsigned green,
			    unsigned blue)
{
	int shift = 16 - depth;
	int err = -EINVAL;

/*
 * Try VGA registers first...
 */
	if (vga_compat) {
		outb_p(regno,       dac_reg);
		outb_p(red   >> shift, dac_val);
		outb_p(green >> shift, dac_val);
		outb_p(blue  >> shift, dac_val);
		err = 0;
	}

#ifdef __i386__
/*
 * Fallback to the PMI....
 */
	if (err && pmi_setpal) {
		struct { u_char blue, green, red, pad; } entry;

		entry.red   = red   >> shift;
		entry.green = green >> shift;
		entry.blue  = blue  >> shift;
		entry.pad   = 0;
	        __asm__ __volatile__(
                "call *(%%esi)"
                : /* no return value */
                : "a" (0x4f09),         /* EAX */
                  "b" (0),              /* EBX */
                  "c" (1),              /* ECX */
                  "d" (regno),          /* EDX */
                  "D" (&entry),         /* EDI */
                  "S" (&pmi_pal));      /* ESI */
		err = 0;
	}
#endif

	return err;
}

static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
			    unsigned blue, unsigned transp,
			    struct fb_info *info)
{
	int err = 0;

	/*
	 *  Set a single color register. The values supplied are
	 *  already rounded down to the hardware's capabilities
	 *  (according to the entries in the `var' structure). Return
	 *  != 0 for invalid regno.
	 */
	
	if (regno >= info->cmap.len)
		return 1;

	if (info->var.bits_per_pixel == 8)
		err = vesa_setpalette(regno,red,green,blue);
	else if (regno < 16) {
		switch (info->var.bits_per_pixel) {
		case 16:
			if (info->var.red.offset == 10) {
				/* 1:5:5:5 */
				((u32*) (info->pseudo_palette))[regno] =
					((red   & 0xf800) >>  1) |
					((green & 0xf800) >>  6) |
					((blue  & 0xf800) >> 11);
			} else {
				/* 0:5:6:5 */
				((u32*) (info->pseudo_palette))[regno] =
					((red   & 0xf800)      ) |
					((green & 0xfc00) >>  5) |
					((blue  & 0xf800) >> 11);
			}
			break;
		case 24:
		case 32:
			red   >>= 8;
			green >>= 8;
			blue  >>= 8;
			((u32 *)(info->pseudo_palette))[regno] =
				(red   << info->var.red.offset)   |
				(green << info->var.green.offset) |
				(blue  << info->var.blue.offset);
			break;
		}
	}

	return err;
}

static void vesafb_destroy(struct fb_info *info)
{
	if (info->screen_base)
		iounmap(info->screen_base);
	release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
	framebuffer_release(info);
}

static struct fb_ops vesafb_ops = {
	.owner		= THIS_MODULE,
	.fb_destroy     = vesafb_destroy,
	.fb_setcolreg	= vesafb_setcolreg,
	.fb_pan_display	= vesafb_pan_display,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};

static int __init vesafb_setup(char *options)
{
	char *this_opt;
	
	if (!options || !*options)
		return 0;
	
	while ((this_opt = strsep(&options, ",")) != NULL) {
		if (!*this_opt) continue;
		
		if (! strcmp(this_opt, "inverse"))
			inverse=1;
		else if (! strcmp(this_opt, "redraw"))
			ypan=0;
		else if (! strcmp(this_opt, "ypan"))
			ypan=1;
		else if (! strcmp(this_opt, "ywrap"))
			ypan=2;
		else if (! strcmp(this_opt, "vgapal"))
			pmi_setpal=0;
		else if (! strcmp(this_opt, "pmipal"))
			pmi_setpal=1;
		else if (! strncmp(this_opt, "mtrr:", 5))
			mtrr = simple_strtoul(this_opt+5, NULL, 0);
		else if (! strcmp(this_opt, "nomtrr"))
			mtrr=0;
		else if (! strncmp(this_opt, "vtotal:", 7))
			vram_total = simple_strtoul(this_opt+7, NULL, 0);
		else if (! strncmp(this_opt, "vremap:", 7))
			vram_remap = simple_strtoul(this_opt+7, NULL, 0);
	}
	return 0;
}

static int __init vesafb_probe(struct platform_device *dev)
{
	struct fb_info *info;
	int i, err;
	unsigned int size_vmode;
	unsigned int size_remap;
	unsigned int size_total;

	if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
		return -ENODEV;

	vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
	vesafb_fix.smem_start = screen_info.lfb_base;
	vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
	if (15 == vesafb_defined.bits_per_pixel)
		vesafb_defined.bits_per_pixel = 16;
	vesafb_defined.xres = screen_info.lfb_width;
	vesafb_defined.yres = screen_info.lfb_height;
	vesafb_fix.line_length = screen_info.lfb_linelength;
	vesafb_fix.visual   = (vesafb_defined.bits_per_pixel == 8) ?
		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;

	/*   size_vmode -- that is the amount of memory needed for the
	 *                 used video mode, i.e. the minimum amount of
	 *                 memory we need. */
	size_vmode = vesafb_defined.yres * vesafb_fix.line_length;

	/*   size_total -- all video memory we have. Used for mtrr
	 *                 entries, resource allocation and bounds
	 *                 checking. */
	size_total = screen_info.lfb_size * 65536;
	if (vram_total)
		size_total = vram_total * 1024 * 1024;
	if (size_total < size_vmode)
		size_total = size_vmode;

	/*   size_remap -- the amount of video memory we are going to
	 *                 use for vesafb.  With modern cards it is no
	 *                 option to simply use size_total as that
	 *                 wastes plenty of kernel address space. */
	size_remap  = size_vmode * 2;
	if (vram_remap)
		size_remap = vram_remap * 1024 * 1024;
	if (size_remap < size_vmode)
		size_remap = size_vmode;
	if (size_remap > size_total)
		size_remap = size_total;
	vesafb_fix.smem_len = size_remap;

#ifndef __i386__
	screen_info.vesapm_seg = 0;
#endif

	if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
		printk(KERN_WARNING
		       "vesafb: cannot reserve video memory at 0x%lx\n",
			vesafb_fix.smem_start);
		/* We cannot make this fatal. Sometimes this comes from magic
		   spaces our resource handlers simply don't know about */
	}

	info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
	if (!info) {
		release_mem_region(vesafb_fix.smem_start, size_total);
		return -ENOMEM;
	}
	info->pseudo_palette = info->par;
	info->par = NULL;

	/* set vesafb aperture size for generic probing */
	info->apertures = alloc_apertures(1);
	if (!info->apertures) {
		err = -ENOMEM;
		goto err;
	}
	info->apertures->ranges[0].base = screen_info.lfb_base;
	info->apertures->ranges[0].size = size_total;

	info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
	if (!info->screen_base) {
		printk(KERN_ERR
		       "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
			vesafb_fix.smem_len, vesafb_fix.smem_start);
		err = -EIO;
		goto err;
	}

	printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
	       "using %dk, total %dk\n",
	       vesafb_fix.smem_start, info->screen_base,
	       size_remap/1024, size_total/1024);
	printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
	       vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);

	if (screen_info.vesapm_seg) {
		printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
		       screen_info.vesapm_seg,screen_info.vesapm_off);
	}

	if (screen_info.vesapm_seg < 0xc000)
		ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */

	if (ypan || pmi_setpal) {
		unsigned short *pmi_base;
		pmi_base  = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
		pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
		pmi_pal   = (void*)((char*)pmi_base + pmi_base[2]);
		printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
		if (pmi_base[3]) {
			printk(KERN_INFO "vesafb: pmi: ports = ");
				for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
					printk("%x ",pmi_base[i]);
			printk("\n");
			if (pmi_base[i] != 0xffff) {
				/*
				 * memory areas not supported (yet?)
				 *
				 * Rules are: we have to set up a descriptor for the requested
				 * memory area and pass it in the ES register to the BIOS function.
				 */
				printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
				ypan = pmi_setpal = 0;
			}
		}
	}

	if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
		printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
		                    "        colors may be incorrect\n");
		vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
	}

	vesafb_defined.xres_virtual = vesafb_defined.xres;
	vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
	if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
		printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
		       (ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
	} else {
		printk(KERN_INFO "vesafb: scrolling: redraw\n");
		vesafb_defined.yres_virtual = vesafb_defined.yres;
		ypan = 0;
	}

	/* some dummy values for timing to make fbset happy */
	vesafb_defined.pixclock     = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
	vesafb_defined.left_margin  = (vesafb_defined.xres / 8) & 0xf8;
	vesafb_defined.hsync_len    = (vesafb_defined.xres / 8) & 0xf8;
	
	vesafb_defined.red.offset    = screen_info.red_pos;
	vesafb_defined.red.length    = screen_info.red_size;
	vesafb_defined.green.offset  = screen_info.green_pos;
	vesafb_defined.green.length  = screen_info.green_size;
	vesafb_defined.blue.offset   = screen_info.blue_pos;
	vesafb_defined.blue.length   = screen_info.blue_size;
	vesafb_defined.transp.offset = screen_info.rsvd_pos;
	vesafb_defined.transp.length = screen_info.rsvd_size;

	if (vesafb_defined.bits_per_pixel <= 8) {
		depth = vesafb_defined.green.length;
		vesafb_defined.red.length =
		vesafb_defined.green.length =
		vesafb_defined.blue.length =
		vesafb_defined.bits_per_pixel;
	}

	printk(KERN_INFO "vesafb: %s: "
	       "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
	       (vesafb_defined.bits_per_pixel > 8) ?
	       "Truecolor" : (vga_compat || pmi_setpal) ?
	       "Pseudocolor" : "Static Pseudocolor",
	       screen_info.rsvd_size,
	       screen_info.red_size,
	       screen_info.green_size,
	       screen_info.blue_size,
	       screen_info.rsvd_pos,
	       screen_info.red_pos,
	       screen_info.green_pos,
	       screen_info.blue_pos);

	vesafb_fix.ypanstep  = ypan     ? 1 : 0;
	vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;

	/* request failure does not faze us, as vgacon probably has this
	 * region already (FIXME) */
	request_region(0x3c0, 32, "vesafb");

#ifdef CONFIG_MTRR
	if (mtrr) {
		unsigned int temp_size = size_total;
		unsigned int type = 0;

		switch (mtrr) {
		case 1:
			type = MTRR_TYPE_UNCACHABLE;
			break;
		case 2:
			type = MTRR_TYPE_WRBACK;
			break;
		case 3:
			type = MTRR_TYPE_WRCOMB;
			break;
		case 4:
			type = MTRR_TYPE_WRTHROUGH;
			break;
		default:
			type = 0;
			break;
		}

		if (type) {
			int rc;

			/* Find the largest power-of-two */
			while (temp_size & (temp_size - 1))
				temp_size &= (temp_size - 1);

			/* Try and find a power of two to add */
			do {
				rc = mtrr_add(vesafb_fix.smem_start, temp_size,
					      type, 1);
				temp_size >>= 1;
			} while (temp_size >= PAGE_SIZE && rc == -EINVAL);
		}
	}
#endif
	
	info->fbops = &vesafb_ops;
	info->var = vesafb_defined;
	info->fix = vesafb_fix;
	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE |
		(ypan ? FBINFO_HWACCEL_YPAN : 0);

	if (!ypan)
		info->fbops->fb_pan_display = NULL;

	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
		err = -ENOMEM;
		goto err;
	}
	if (register_framebuffer(info)<0) {
		err = -EINVAL;
		fb_dealloc_cmap(&info->cmap);
		goto err;
	}
	printk(KERN_INFO "fb%d: %s frame buffer device\n",
	       info->node, info->fix.id);
	return 0;
err:
	if (info->screen_base)
		iounmap(info->screen_base);
	framebuffer_release(info);
	release_mem_region(vesafb_fix.smem_start, size_total);
	return err;
}

static struct platform_driver vesafb_driver = {
	.driver	= {
		.name	= "vesafb",
	},
};

static struct platform_device *vesafb_device;

static int __init vesafb_init(void)
{
	int ret;
	char *option = NULL;

	/* ignore error return of fb_get_options */
	fb_get_options("vesafb", &option);
	vesafb_setup(option);

	vesafb_device = platform_device_alloc("vesafb", 0);
	if (!vesafb_device)
		return -ENOMEM;

	ret = platform_device_add(vesafb_device);
	if (!ret) {
		ret = platform_driver_probe(&vesafb_driver, vesafb_probe);
		if (ret)
			platform_device_del(vesafb_device);
	}

	if (ret) {
		platform_device_put(vesafb_device);
		vesafb_device = NULL;
	}

	return ret;
}
module_init(vesafb_init);

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* framebuffer driver for VBE 2.0 compliant graphic boards
	3	*
	4	* switching to graphics mode happens at boot time (while
	5	* running in real mode, see arch/i386/boot/video.S).
	6	*
	7	* (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
	8	*
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/kernel.h>
	13	#include <linux/errno.h>
	14	#include <linux/string.h>
	15	#include <linux/mm.h>
1da177e4 LT	16	#include <linux/delay.h>
	17	#include <linux/fb.h>
	18	#include <linux/ioport.h>
	19	#include <linux/init.h>
d052d1be	20	#include <linux/platform_device.h>
a8f340e3	21	#include <linux/screen_info.h>
d052d1be	22
d2d58384	23	#include <video/vga.h>
1da177e4 LT	24	#include <asm/io.h>
	25	#include <asm/mtrr.h>
	26
	27	#define dac_reg (0x3c8)
	28	#define dac_val (0x3c9)
	29
	30	/* --------------------------------------------------------------------- */
	31
	32	static struct fb_var_screeninfo vesafb_defined __initdata = {
	33	.activate = FB_ACTIVATE_NOW,
	34	.height = -1,
	35	.width = -1,
	36	.right_margin = 32,
	37	.upper_margin = 16,
	38	.lower_margin = 4,
	39	.vsync_len = 4,
	40	.vmode = FB_VMODE_NONINTERLACED,
	41	};
	42
	43	static struct fb_fix_screeninfo vesafb_fix __initdata = {
	44	.id = "VESA VGA",
	45	.type = FB_TYPE_PACKED_PIXELS,
	46	.accel = FB_ACCEL_NONE,
	47	};
	48
4670358a HD	49	static int inverse __read_mostly;
	50	static int mtrr __read_mostly; /* disable mtrr */
	51	static int vram_remap __initdata; /* Set amount of memory to be used */
	52	static int vram_total __initdata; /* Set total amount of memory */
	53	static int pmi_setpal __read_mostly = 1; /* pmi for palette changes ??? */
	54	static int ypan __read_mostly; /* 0..nothing, 1..ypan, 2..ywrap */
	55	static void (*pmi_start)(void) __read_mostly;
	56	static void (*pmi_pal) (void) __read_mostly;
	57	static int depth __read_mostly;
	58	static int vga_compat __read_mostly;
1da177e4 LT	59	/* --------------------------------------------------------------------- */
	60
	61	static int vesafb_pan_display(struct fb_var_screeninfo *var,
	62	struct fb_info *info)
	63	{
	64	#ifdef __i386__
	65	int offset;
	66
1da177e4 LT	67	offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
	68
	69	__asm__ __volatile__(
	70	"call *(%%edi)"
	71	: /* no return value */
	72	: "a" (0x4f07), /* EAX */
	73	"b" (0), /* EBX */
	74	"c" (offset), /* ECX */
	75	"d" (offset >> 16), /* EDX */
	76	"D" (&pmi_start)); /* EDI */
	77	#endif
	78	return 0;
	79	}
	80
313ca22f	81	static int vesa_setpalette(int regno, unsigned red, unsigned green,
1da177e4 LT	82	unsigned blue)
1da177e4 LT	83	{
89ec4c23	84	int shift = 16 - depth;
313ca22f	85	int err = -EINVAL;
89ec4c23	86
6dbde380 AD	87	/*
	88	* Try VGA registers first...
	89	*/
	90	if (vga_compat) {
	91	outb_p(regno, dac_reg);
	92	outb_p(red >> shift, dac_val);
	93	outb_p(green >> shift, dac_val);
	94	outb_p(blue >> shift, dac_val);
	95	err = 0;
	96	}
	97
1da177e4	98	#ifdef __i386__
6dbde380 AD	99	/*
	100	* Fallback to the PMI....
	101	*/
	102	if (err && pmi_setpal) {
	103	struct { u_char blue, green, red, pad; } entry;
1da177e4	104
1da177e4 LT	105	entry.red = red >> shift;
	106	entry.green = green >> shift;
	107	entry.blue = blue >> shift;
	108	entry.pad = 0;
	109	__asm__ __volatile__(
	110	"call *(%%esi)"
	111	: /* no return value */
	112	: "a" (0x4f09), /* EAX */
	113	"b" (0), /* EBX */
	114	"c" (1), /* ECX */
	115	"d" (regno), /* EDX */
	116	"D" (&entry), /* EDI */
	117	"S" (&pmi_pal)); /* ESI */
313ca22f	118	err = 0;
89ec4c23 AD	119	}
	120	#endif
	121
313ca22f	122	return err;
1da177e4 LT	123	}
	124
	125	static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
	126	unsigned blue, unsigned transp,
	127	struct fb_info *info)
	128	{
313ca22f AD	129	int err = 0;
313ca22f AD	130
1da177e4 LT	131	/*
	132	* Set a single color register. The values supplied are
	133	* already rounded down to the hardware's capabilities
	134	* (according to the entries in the `var' structure). Return
	135	* != 0 for invalid regno.
	136	*/
	137
	138	if (regno >= info->cmap.len)
	139	return 1;
	140
eba50850	141	if (info->var.bits_per_pixel == 8)
313ca22f	142	err = vesa_setpalette(regno,red,green,blue);
eba50850 AD	143	else if (regno < 16) {
	144	switch (info->var.bits_per_pixel) {
	145	case 16:
	146	if (info->var.red.offset == 10) {
	147	/* 1:5:5:5 */
	148	((u32*) (info->pseudo_palette))[regno] =
1da177e4 LT	149	((red & 0xf800) >> 1) \|
	150	((green & 0xf800) >> 6) \|
	151	((blue & 0xf800) >> 11);
eba50850 AD	152	} else {
	153	/* 0:5:6:5 */
	154	((u32*) (info->pseudo_palette))[regno] =
1da177e4 LT	155	((red & 0xf800) ) \|
	156	((green & 0xfc00) >> 5) \|
	157	((blue & 0xf800) >> 11);
eba50850 AD	158	}
	159	break;
	160	case 24:
	161	case 32:
	162	red >>= 8;
	163	green >>= 8;
	164	blue >>= 8;
	165	((u32 *)(info->pseudo_palette))[regno] =
	166	(red << info->var.red.offset) \|
	167	(green << info->var.green.offset) \|
	168	(blue << info->var.blue.offset);
	169	break;
1da177e4	170	}
eba50850 AD	171	}
eba50850 AD	172
313ca22f	173	return err;
1da177e4 LT	174	}
1da177e4 LT	175
4410f391 DA	176	static void vesafb_destroy(struct fb_info *info)
	177	{
	178	if (info->screen_base)
	179	iounmap(info->screen_base);
1471ca9a	180	release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
4410f391 DA	181	framebuffer_release(info);
	182	}
	183
1da177e4 LT	184	static struct fb_ops vesafb_ops = {
1da177e4 LT	185	.owner = THIS_MODULE,
4410f391	186	.fb_destroy = vesafb_destroy,
1da177e4 LT	187	.fb_setcolreg = vesafb_setcolreg,
	188	.fb_pan_display = vesafb_pan_display,
	189	.fb_fillrect = cfb_fillrect,
	190	.fb_copyarea = cfb_copyarea,
	191	.fb_imageblit = cfb_imageblit,
1da177e4 LT	192	};
	193
	194	static int __init vesafb_setup(char *options)
	195	{
	196	char *this_opt;
	197
	198	if (!options \|\| !*options)
	199	return 0;
	200
	201	while ((this_opt = strsep(&options, ",")) != NULL) {
	202	if (!*this_opt) continue;
	203
	204	if (! strcmp(this_opt, "inverse"))
	205	inverse=1;
	206	else if (! strcmp(this_opt, "redraw"))
	207	ypan=0;
	208	else if (! strcmp(this_opt, "ypan"))
	209	ypan=1;
	210	else if (! strcmp(this_opt, "ywrap"))
	211	ypan=2;
	212	else if (! strcmp(this_opt, "vgapal"))
	213	pmi_setpal=0;
	214	else if (! strcmp(this_opt, "pmipal"))
	215	pmi_setpal=1;
80625942 AD	216	else if (! strncmp(this_opt, "mtrr:", 5))
80625942 AD	217	mtrr = simple_strtoul(this_opt+5, NULL, 0);
1da177e4 LT	218	else if (! strcmp(this_opt, "nomtrr"))
	219	mtrr=0;
	220	else if (! strncmp(this_opt, "vtotal:", 7))
	221	vram_total = simple_strtoul(this_opt+7, NULL, 0);
	222	else if (! strncmp(this_opt, "vremap:", 7))
	223	vram_remap = simple_strtoul(this_opt+7, NULL, 0);
	224	}
	225	return 0;
	226	}
	227
fc95c6d9	228	static int __init vesafb_probe(struct platform_device *dev)
1da177e4	229	{
1da177e4 LT	230	struct fb_info *info;
	231	int i, err;
	232	unsigned int size_vmode;
	233	unsigned int size_remap;
	234	unsigned int size_total;
	235
	236	if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
	237	return -ENODEV;
	238
89ec4c23	239	vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
1da177e4 LT	240	vesafb_fix.smem_start = screen_info.lfb_base;
	241	vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
	242	if (15 == vesafb_defined.bits_per_pixel)
	243	vesafb_defined.bits_per_pixel = 16;
	244	vesafb_defined.xres = screen_info.lfb_width;
	245	vesafb_defined.yres = screen_info.lfb_height;
	246	vesafb_fix.line_length = screen_info.lfb_linelength;
	247	vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
	248	FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	249
	250	/* size_vmode -- that is the amount of memory needed for the
	251	* used video mode, i.e. the minimum amount of
	252	* memory we need. */
	253	size_vmode = vesafb_defined.yres * vesafb_fix.line_length;
	254
	255	/* size_total -- all video memory we have. Used for mtrr
8aed6288	256	* entries, resource allocation and bounds
1da177e4 LT	257	* checking. */
	258	size_total = screen_info.lfb_size * 65536;
	259	if (vram_total)
	260	size_total = vram_total * 1024 * 1024;
	261	if (size_total < size_vmode)
	262	size_total = size_vmode;
	263
	264	/* size_remap -- the amount of video memory we are going to
	265	* use for vesafb. With modern cards it is no
	266	* option to simply use size_total as that
	267	* wastes plenty of kernel address space. */
	268	size_remap = size_vmode * 2;
	269	if (vram_remap)
	270	size_remap = vram_remap * 1024 * 1024;
	271	if (size_remap < size_vmode)
	272	size_remap = size_vmode;
	273	if (size_remap > size_total)
	274	size_remap = size_total;
	275	vesafb_fix.smem_len = size_remap;
	276
	277	#ifndef __i386__
	278	screen_info.vesapm_seg = 0;
	279	#endif
	280
	281	if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
	282	printk(KERN_WARNING
78c03717	283	"vesafb: cannot reserve video memory at 0x%lx\n",
1da177e4 LT	284	vesafb_fix.smem_start);
	285	/* We cannot make this fatal. Sometimes this comes from magic
	286	spaces our resource handlers simply don't know about */
	287	}
	288
	289	info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
	290	if (!info) {
78c03717	291	release_mem_region(vesafb_fix.smem_start, size_total);
1da177e4 LT	292	return -ENOMEM;
	293	}
	294	info->pseudo_palette = info->par;
	295	info->par = NULL;
	296
4410f391	297	/* set vesafb aperture size for generic probing */
1471ca9a MS	298	info->apertures = alloc_apertures(1);
	299	if (!info->apertures) {
	300	err = -ENOMEM;
	301	goto err;
	302	}
	303	info->apertures->ranges[0].base = screen_info.lfb_base;
	304	info->apertures->ranges[0].size = size_total;
4410f391	305
78c03717	306	info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
1da177e4 LT	307	if (!info->screen_base) {
	308	printk(KERN_ERR
	309	"vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
	310	vesafb_fix.smem_len, vesafb_fix.smem_start);
	311	err = -EIO;
	312	goto err;
	313	}
	314
	315	printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
	316	"using %dk, total %dk\n",
	317	vesafb_fix.smem_start, info->screen_base,
	318	size_remap/1024, size_total/1024);
	319	printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
	320	vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
	321
	322	if (screen_info.vesapm_seg) {
	323	printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
	324	screen_info.vesapm_seg,screen_info.vesapm_off);
	325	}
	326
	327	if (screen_info.vesapm_seg < 0xc000)
	328	ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
	329
	330	if (ypan \|\| pmi_setpal) {
4670358a	331	unsigned short *pmi_base;
1da177e4 LT	332	pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
	333	pmi_start = (void)((char)pmi_base + pmi_base[1]);
	334	pmi_pal = (void)((char)pmi_base + pmi_base[2]);
	335	printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
	336	if (pmi_base[3]) {
	337	printk(KERN_INFO "vesafb: pmi: ports = ");
	338	for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
	339	printk("%x ",pmi_base[i]);
	340	printk("\n");
	341	if (pmi_base[i] != 0xffff) {
	342	/*
	343	* memory areas not supported (yet?)
	344	*
	345	* Rules are: we have to set up a descriptor for the requested
	346	* memory area and pass it in the ES register to the BIOS function.
	347	*/
	348	printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
	349	ypan = pmi_setpal = 0;
	350	}
	351	}
	352	}
	353
89ec4c23 AD	354	if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
	355	printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
	356	" colors may be incorrect\n");
	357	vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
	358	}
	359
1da177e4 LT	360	vesafb_defined.xres_virtual = vesafb_defined.xres;
	361	vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
	362	if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
	363	printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
	364	(ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
	365	} else {
	366	printk(KERN_INFO "vesafb: scrolling: redraw\n");
	367	vesafb_defined.yres_virtual = vesafb_defined.yres;
	368	ypan = 0;
	369	}
	370
	371	/* some dummy values for timing to make fbset happy */
	372	vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
	373	vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
	374	vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
	375
	376	vesafb_defined.red.offset = screen_info.red_pos;
	377	vesafb_defined.red.length = screen_info.red_size;
	378	vesafb_defined.green.offset = screen_info.green_pos;
	379	vesafb_defined.green.length = screen_info.green_size;
	380	vesafb_defined.blue.offset = screen_info.blue_pos;
	381	vesafb_defined.blue.length = screen_info.blue_size;
	382	vesafb_defined.transp.offset = screen_info.rsvd_pos;
	383	vesafb_defined.transp.length = screen_info.rsvd_size;
	384
	385	if (vesafb_defined.bits_per_pixel <= 8) {
	386	depth = vesafb_defined.green.length;
	387	vesafb_defined.red.length =
	388	vesafb_defined.green.length =
	389	vesafb_defined.blue.length =
	390	vesafb_defined.bits_per_pixel;
	391	}
	392
	393	printk(KERN_INFO "vesafb: %s: "
	394	"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
	395	(vesafb_defined.bits_per_pixel > 8) ?
89ec4c23 AD	396	"Truecolor" : (vga_compat \|\| pmi_setpal) ?
89ec4c23 AD	397	"Pseudocolor" : "Static Pseudocolor",
1da177e4 LT	398	screen_info.rsvd_size,
	399	screen_info.red_size,
	400	screen_info.green_size,
	401	screen_info.blue_size,
	402	screen_info.rsvd_pos,
	403	screen_info.red_pos,
	404	screen_info.green_pos,
	405	screen_info.blue_pos);
	406
	407	vesafb_fix.ypanstep = ypan ? 1 : 0;
	408	vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
	409
	410	/* request failure does not faze us, as vgacon probably has this
	411	* region already (FIXME) */
	412	request_region(0x3c0, 32, "vesafb");
	413
f5f4917c	414	#ifdef CONFIG_MTRR
1da177e4	415	if (mtrr) {
78c03717	416	unsigned int temp_size = size_total;
80625942 AD	417	unsigned int type = 0;
	418
	419	switch (mtrr) {
	420	case 1:
	421	type = MTRR_TYPE_UNCACHABLE;
	422	break;
	423	case 2:
	424	type = MTRR_TYPE_WRBACK;
	425	break;
	426	case 3:
	427	type = MTRR_TYPE_WRCOMB;
	428	break;
	429	case 4:
	430	type = MTRR_TYPE_WRTHROUGH;
	431	break;
	432	default:
	433	type = 0;
	434	break;
	435	}
	436
	437	if (type) {
	438	int rc;
	439
	440	/* Find the largest power-of-two */
	441	while (temp_size & (temp_size - 1))
	442	temp_size &= (temp_size - 1);
	443
	444	/* Try and find a power of two to add */
	445	do {
	446	rc = mtrr_add(vesafb_fix.smem_start, temp_size,
	447	type, 1);
	448	temp_size >>= 1;
	449	} while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1da177e4 LT	450	}
1da177e4 LT	451	}
f5f4917c	452	#endif
1da177e4 LT	453
	454	info->fbops = &vesafb_ops;
	455	info->var = vesafb_defined;
	456	info->fix = vesafb_fix;
4410f391	457	info->flags = FBINFO_FLAG_DEFAULT \| FBINFO_MISC_FIRMWARE \|
b83734ec	458	(ypan ? FBINFO_HWACCEL_YPAN : 0);
1da177e4	459
e53f87a0 AD	460	if (!ypan)
	461	info->fbops->fb_pan_display = NULL;
	462
1da177e4 LT	463	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
	464	err = -ENOMEM;
	465	goto err;
	466	}
	467	if (register_framebuffer(info)<0) {
	468	err = -EINVAL;
	469	fb_dealloc_cmap(&info->cmap);
	470	goto err;
	471	}
	472	printk(KERN_INFO "fb%d: %s frame buffer device\n",
	473	info->node, info->fix.id);
	474	return 0;
	475	err:
b88a57cc AL	476	if (info->screen_base)
b88a57cc AL	477	iounmap(info->screen_base);
1da177e4 LT	478	framebuffer_release(info);
	479	release_mem_region(vesafb_fix.smem_start, size_total);
	480	return err;
	481	}
	482
3ae5eaec	483	static struct platform_driver vesafb_driver = {
3ae5eaec RK	484	.driver = {
	485	.name = "vesafb",
	486	},
1da177e4 LT	487	};
1da177e4 LT	488
103edf02	489	static struct platform_device *vesafb_device;
1da177e4 LT	490
	491	static int __init vesafb_init(void)
	492	{
	493	int ret;
	494	char *option = NULL;
	495
	496	/* ignore error return of fb_get_options */
	497	fb_get_options("vesafb", &option);
	498	vesafb_setup(option);
1da177e4	499
fc95c6d9 JB	500	vesafb_device = platform_device_alloc("vesafb", 0);
	501	if (!vesafb_device)
	502	return -ENOMEM;
103edf02	503
fc95c6d9 JB	504	ret = platform_device_add(vesafb_device);
	505	if (!ret) {
	506	ret = platform_driver_probe(&vesafb_driver, vesafb_probe);
	507	if (ret)
	508	platform_device_del(vesafb_device);
	509	}
103edf02	510
fc95c6d9 JB	511	if (ret) {
	512	platform_device_put(vesafb_device);
	513	vesafb_device = NULL;
1da177e4	514	}
103edf02	515
1da177e4 LT	516	return ret;
	517	}
	518	module_init(vesafb_init);
	519
	520	MODULE_LICENSE("GPL");