[mirror_ubuntu-hirsute-kernel.git] / drivers / video / fbdev / vesafb.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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 <linux/io.h>

#include <video/vga.h>

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

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

struct vesafb_par {
	u32 pseudo_palette[256];
	int wc_cookie;
};

static struct fb_var_screeninfo vesafb_defined = {
	.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 = {
	.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;			/* Set amount of memory to be used */
static int   vram_total;			/* 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)
{
	struct vesafb_par *par = info->par;

	fb_dealloc_cmap(&info->cmap);
	arch_phys_wc_del(par->wc_cookie);
	if (info->screen_base)
		iounmap(info->screen_base);
	release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
}

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 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 vesafb_probe(struct platform_device *dev)
{
	struct fb_info *info;
	struct vesafb_par *par;
	int i, err;
	unsigned int size_vmode;
	unsigned int size_remap;
	unsigned int size_total;
	char *option = NULL;

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

	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(struct vesafb_par), &dev->dev);
	if (!info) {
		release_mem_region(vesafb_fix.smem_start, size_total);
		return -ENOMEM;
	}
	platform_set_drvdata(dev, info);
	par = info->par;
	info->pseudo_palette = par->pseudo_palette;

	/* 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;

	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");

	if (mtrr == 3) {
		unsigned int temp_size = size_total;

		/* Find the largest power-of-two */
		temp_size = roundup_pow_of_two(temp_size);

		/* Try and find a power of two to add */
		do {
			par->wc_cookie =
				arch_phys_wc_add(vesafb_fix.smem_start,
						 temp_size);
			temp_size >>= 1;
		} while (temp_size >= PAGE_SIZE && par->wc_cookie < 0);

		info->screen_base = ioremap_wc(vesafb_fix.smem_start, vesafb_fix.smem_len);
	} else {
		if (mtrr && mtrr != 3)
			WARN_ONCE(1, "Only MTRR_TYPE_WRCOMB (3) make sense\n");
		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);

	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;
	}
	fb_info(info, "%s frame buffer device\n", info->fix.id);
	return 0;
err:
	arch_phys_wc_del(par->wc_cookie);
	if (info->screen_base)
		iounmap(info->screen_base);
	framebuffer_release(info);
	release_mem_region(vesafb_fix.smem_start, size_total);
	return err;
}

static int vesafb_remove(struct platform_device *pdev)
{
	struct fb_info *info = platform_get_drvdata(pdev);

	unregister_framebuffer(info);
	framebuffer_release(info);

	return 0;
}

static struct platform_driver vesafb_driver = {
	.driver = {
		.name = "vesa-framebuffer",
	},
	.probe = vesafb_probe,
	.remove = vesafb_remove,
};

module_platform_driver(vesafb_driver);
MODULE_LICENSE("GPL");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* framebuffer driver for VBE 2.0 compliant graphic boards
	4	*
	5	* switching to graphics mode happens at boot time (while
	6	* running in real mode, see arch/i386/boot/video.S).
	7	*
	8	* (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
	9	*
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/kernel.h>
	14	#include <linux/errno.h>
	15	#include <linux/string.h>
	16	#include <linux/mm.h>
1da177e4 LT	17	#include <linux/delay.h>
	18	#include <linux/fb.h>
	19	#include <linux/ioport.h>
	20	#include <linux/init.h>
d052d1be	21	#include <linux/platform_device.h>
a8f340e3	22	#include <linux/screen_info.h>
127b0c94	23	#include <linux/io.h>
d052d1be	24
d2d58384	25	#include <video/vga.h>
1da177e4 LT	26
	27	#define dac_reg (0x3c8)
	28	#define dac_val (0x3c9)
	29
	30	/* --------------------------------------------------------------------- */
	31
6b41f27d LR	32	struct vesafb_par {
	33	u32 pseudo_palette[256];
	34	int wc_cookie;
	35	};
	36
2e5155ec	37	static struct fb_var_screeninfo vesafb_defined = {
1da177e4 LT	38	.activate = FB_ACTIVATE_NOW,
	39	.height = -1,
	40	.width = -1,
	41	.right_margin = 32,
	42	.upper_margin = 16,
	43	.lower_margin = 4,
	44	.vsync_len = 4,
	45	.vmode = FB_VMODE_NONINTERLACED,
	46	};
	47
2e5155ec	48	static struct fb_fix_screeninfo vesafb_fix = {
1da177e4 LT	49	.id = "VESA VGA",
	50	.type = FB_TYPE_PACKED_PIXELS,
	51	.accel = FB_ACCEL_NONE,
	52	};
	53
4670358a HD	54	static int inverse __read_mostly;
4670358a HD	55	static int mtrr __read_mostly; /* disable mtrr */
2e5155ec DH	56	static int vram_remap; /* Set amount of memory to be used */
2e5155ec DH	57	static int vram_total; /* Set total amount of memory */
4670358a HD	58	static int pmi_setpal __read_mostly = 1; /* pmi for palette changes ??? */
	59	static int ypan __read_mostly; /* 0..nothing, 1..ypan, 2..ywrap */
	60	static void (*pmi_start)(void) __read_mostly;
	61	static void (*pmi_pal) (void) __read_mostly;
	62	static int depth __read_mostly;
	63	static int vga_compat __read_mostly;
1da177e4 LT	64	/* --------------------------------------------------------------------- */
	65
	66	static int vesafb_pan_display(struct fb_var_screeninfo *var,
	67	struct fb_info *info)
	68	{
	69	#ifdef __i386__
	70	int offset;
	71
1da177e4 LT	72	offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
	73
	74	__asm__ __volatile__(
	75	"call *(%%edi)"
	76	: /* no return value */
	77	: "a" (0x4f07), /* EAX */
	78	"b" (0), /* EBX */
	79	"c" (offset), /* ECX */
	80	"d" (offset >> 16), /* EDX */
	81	"D" (&pmi_start)); /* EDI */
	82	#endif
	83	return 0;
	84	}
	85
313ca22f	86	static int vesa_setpalette(int regno, unsigned red, unsigned green,
1da177e4 LT	87	unsigned blue)
1da177e4 LT	88	{
89ec4c23	89	int shift = 16 - depth;
313ca22f	90	int err = -EINVAL;
89ec4c23	91
6dbde380 AD	92	/*
	93	* Try VGA registers first...
	94	*/
	95	if (vga_compat) {
	96	outb_p(regno, dac_reg);
	97	outb_p(red >> shift, dac_val);
	98	outb_p(green >> shift, dac_val);
	99	outb_p(blue >> shift, dac_val);
	100	err = 0;
	101	}
	102
1da177e4	103	#ifdef __i386__
6dbde380 AD	104	/*
	105	* Fallback to the PMI....
	106	*/
	107	if (err && pmi_setpal) {
	108	struct { u_char blue, green, red, pad; } entry;
1da177e4	109
1da177e4 LT	110	entry.red = red >> shift;
	111	entry.green = green >> shift;
	112	entry.blue = blue >> shift;
	113	entry.pad = 0;
	114	__asm__ __volatile__(
	115	"call *(%%esi)"
	116	: /* no return value */
	117	: "a" (0x4f09), /* EAX */
	118	"b" (0), /* EBX */
	119	"c" (1), /* ECX */
	120	"d" (regno), /* EDX */
	121	"D" (&entry), /* EDI */
	122	"S" (&pmi_pal)); /* ESI */
313ca22f	123	err = 0;
89ec4c23 AD	124	}
	125	#endif
	126
313ca22f	127	return err;
1da177e4 LT	128	}
	129
	130	static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
	131	unsigned blue, unsigned transp,
	132	struct fb_info *info)
	133	{
313ca22f AD	134	int err = 0;
313ca22f AD	135
1da177e4 LT	136	/*
	137	* Set a single color register. The values supplied are
	138	* already rounded down to the hardware's capabilities
	139	* (according to the entries in the `var' structure). Return
	140	* != 0 for invalid regno.
	141	*/
	142
	143	if (regno >= info->cmap.len)
	144	return 1;
	145
eba50850	146	if (info->var.bits_per_pixel == 8)
313ca22f	147	err = vesa_setpalette(regno,red,green,blue);
eba50850 AD	148	else if (regno < 16) {
	149	switch (info->var.bits_per_pixel) {
	150	case 16:
	151	if (info->var.red.offset == 10) {
	152	/* 1:5:5:5 */
	153	((u32*) (info->pseudo_palette))[regno] =
1da177e4 LT	154	((red & 0xf800) >> 1) \|
	155	((green & 0xf800) >> 6) \|
	156	((blue & 0xf800) >> 11);
eba50850 AD	157	} else {
	158	/* 0:5:6:5 */
	159	((u32*) (info->pseudo_palette))[regno] =
1da177e4 LT	160	((red & 0xf800) ) \|
	161	((green & 0xfc00) >> 5) \|
	162	((blue & 0xf800) >> 11);
eba50850 AD	163	}
	164	break;
	165	case 24:
	166	case 32:
	167	red >>= 8;
	168	green >>= 8;
	169	blue >>= 8;
	170	((u32 *)(info->pseudo_palette))[regno] =
	171	(red << info->var.red.offset) \|
	172	(green << info->var.green.offset) \|
	173	(blue << info->var.blue.offset);
	174	break;
1da177e4	175	}
eba50850 AD	176	}
eba50850 AD	177
313ca22f	178	return err;
1da177e4 LT	179	}
1da177e4 LT	180
4410f391 DA	181	static void vesafb_destroy(struct fb_info *info)
4410f391 DA	182	{
6b41f27d	183	struct vesafb_par *par = info->par;
6b41f27d	184
3e86f1d8	185	fb_dealloc_cmap(&info->cmap);
127b0c94	186	arch_phys_wc_del(par->wc_cookie);
4410f391 DA	187	if (info->screen_base)
4410f391 DA	188	iounmap(info->screen_base);
1471ca9a	189	release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
4410f391 DA	190	}
4410f391 DA	191
1da177e4 LT	192	static struct fb_ops vesafb_ops = {
1da177e4 LT	193	.owner = THIS_MODULE,
4410f391	194	.fb_destroy = vesafb_destroy,
1da177e4 LT	195	.fb_setcolreg = vesafb_setcolreg,
	196	.fb_pan_display = vesafb_pan_display,
	197	.fb_fillrect = cfb_fillrect,
	198	.fb_copyarea = cfb_copyarea,
	199	.fb_imageblit = cfb_imageblit,
1da177e4 LT	200	};
1da177e4 LT	201
2e5155ec	202	static int vesafb_setup(char *options)
1da177e4 LT	203	{
	204	char *this_opt;
	205
	206	if (!options \|\| !*options)
	207	return 0;
	208
	209	while ((this_opt = strsep(&options, ",")) != NULL) {
	210	if (!*this_opt) continue;
	211
	212	if (! strcmp(this_opt, "inverse"))
	213	inverse=1;
	214	else if (! strcmp(this_opt, "redraw"))
	215	ypan=0;
	216	else if (! strcmp(this_opt, "ypan"))
	217	ypan=1;
	218	else if (! strcmp(this_opt, "ywrap"))
	219	ypan=2;
	220	else if (! strcmp(this_opt, "vgapal"))
	221	pmi_setpal=0;
	222	else if (! strcmp(this_opt, "pmipal"))
	223	pmi_setpal=1;
80625942 AD	224	else if (! strncmp(this_opt, "mtrr:", 5))
80625942 AD	225	mtrr = simple_strtoul(this_opt+5, NULL, 0);
1da177e4 LT	226	else if (! strcmp(this_opt, "nomtrr"))
	227	mtrr=0;
	228	else if (! strncmp(this_opt, "vtotal:", 7))
	229	vram_total = simple_strtoul(this_opt+7, NULL, 0);
	230	else if (! strncmp(this_opt, "vremap:", 7))
	231	vram_remap = simple_strtoul(this_opt+7, NULL, 0);
	232	}
	233	return 0;
	234	}
	235
2e5155ec	236	static int vesafb_probe(struct platform_device *dev)
1da177e4	237	{
1da177e4	238	struct fb_info *info;
6b41f27d	239	struct vesafb_par *par;
1da177e4 LT	240	int i, err;
	241	unsigned int size_vmode;
	242	unsigned int size_remap;
	243	unsigned int size_total;
2e5155ec DH	244	char *option = NULL;
	245
	246	/* ignore error return of fb_get_options */
	247	fb_get_options("vesafb", &option);
	248	vesafb_setup(option);
1da177e4 LT	249
	250	if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
	251	return -ENODEV;
	252
89ec4c23	253	vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
1da177e4 LT	254	vesafb_fix.smem_start = screen_info.lfb_base;
	255	vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
	256	if (15 == vesafb_defined.bits_per_pixel)
	257	vesafb_defined.bits_per_pixel = 16;
	258	vesafb_defined.xres = screen_info.lfb_width;
	259	vesafb_defined.yres = screen_info.lfb_height;
	260	vesafb_fix.line_length = screen_info.lfb_linelength;
	261	vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
	262	FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	263
	264	/* size_vmode -- that is the amount of memory needed for the
	265	* used video mode, i.e. the minimum amount of
	266	* memory we need. */
	267	size_vmode = vesafb_defined.yres * vesafb_fix.line_length;
	268
	269	/* size_total -- all video memory we have. Used for mtrr
8aed6288	270	* entries, resource allocation and bounds
1da177e4 LT	271	* checking. */
	272	size_total = screen_info.lfb_size * 65536;
	273	if (vram_total)
	274	size_total = vram_total * 1024 * 1024;
	275	if (size_total < size_vmode)
	276	size_total = size_vmode;
	277
	278	/* size_remap -- the amount of video memory we are going to
	279	* use for vesafb. With modern cards it is no
	280	* option to simply use size_total as that
	281	* wastes plenty of kernel address space. */
	282	size_remap = size_vmode * 2;
	283	if (vram_remap)
	284	size_remap = vram_remap * 1024 * 1024;
	285	if (size_remap < size_vmode)
	286	size_remap = size_vmode;
	287	if (size_remap > size_total)
	288	size_remap = size_total;
	289	vesafb_fix.smem_len = size_remap;
	290
	291	#ifndef __i386__
	292	screen_info.vesapm_seg = 0;
	293	#endif
	294
	295	if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
	296	printk(KERN_WARNING
78c03717	297	"vesafb: cannot reserve video memory at 0x%lx\n",
1da177e4 LT	298	vesafb_fix.smem_start);
	299	/* We cannot make this fatal. Sometimes this comes from magic
	300	spaces our resource handlers simply don't know about */
	301	}
	302
6b41f27d	303	info = framebuffer_alloc(sizeof(struct vesafb_par), &dev->dev);
1da177e4	304	if (!info) {
78c03717	305	release_mem_region(vesafb_fix.smem_start, size_total);
1da177e4 LT	306	return -ENOMEM;
1da177e4 LT	307	}
60231da1	308	platform_set_drvdata(dev, info);
6b41f27d LR	309	par = info->par;
6b41f27d LR	310	info->pseudo_palette = par->pseudo_palette;
1da177e4	311
4410f391	312	/* set vesafb aperture size for generic probing */
1471ca9a MS	313	info->apertures = alloc_apertures(1);
	314	if (!info->apertures) {
	315	err = -ENOMEM;
	316	goto err;
	317	}
	318	info->apertures->ranges[0].base = screen_info.lfb_base;
	319	info->apertures->ranges[0].size = size_total;
4410f391	320
1da177e4 LT	321	printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
	322	vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
	323
	324	if (screen_info.vesapm_seg) {
	325	printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
	326	screen_info.vesapm_seg,screen_info.vesapm_off);
	327	}
	328
	329	if (screen_info.vesapm_seg < 0xc000)
	330	ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
	331
	332	if (ypan \|\| pmi_setpal) {
4670358a	333	unsigned short *pmi_base;
1da177e4 LT	334	pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
	335	pmi_start = (void)((char)pmi_base + pmi_base[1]);
	336	pmi_pal = (void)((char)pmi_base + pmi_base[2]);
	337	printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
	338	if (pmi_base[3]) {
	339	printk(KERN_INFO "vesafb: pmi: ports = ");
a7ae716e CIK	340	for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
a7ae716e CIK	341	printk("%x ", pmi_base[i]);
1da177e4 LT	342	printk("\n");
	343	if (pmi_base[i] != 0xffff) {
	344	/*
	345	* memory areas not supported (yet?)
	346	*
	347	* Rules are: we have to set up a descriptor for the requested
	348	* memory area and pass it in the ES register to the BIOS function.
	349	*/
	350	printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
	351	ypan = pmi_setpal = 0;
	352	}
	353	}
	354	}
	355
89ec4c23 AD	356	if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
	357	printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
	358	" colors may be incorrect\n");
	359	vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
	360	}
	361
1da177e4 LT	362	vesafb_defined.xres_virtual = vesafb_defined.xres;
	363	vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
	364	if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
	365	printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
	366	(ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
	367	} else {
	368	printk(KERN_INFO "vesafb: scrolling: redraw\n");
	369	vesafb_defined.yres_virtual = vesafb_defined.yres;
	370	ypan = 0;
	371	}
	372
	373	/* some dummy values for timing to make fbset happy */
	374	vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
	375	vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
	376	vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
	377
	378	vesafb_defined.red.offset = screen_info.red_pos;
	379	vesafb_defined.red.length = screen_info.red_size;
	380	vesafb_defined.green.offset = screen_info.green_pos;
	381	vesafb_defined.green.length = screen_info.green_size;
	382	vesafb_defined.blue.offset = screen_info.blue_pos;
	383	vesafb_defined.blue.length = screen_info.blue_size;
	384	vesafb_defined.transp.offset = screen_info.rsvd_pos;
	385	vesafb_defined.transp.length = screen_info.rsvd_size;
	386
	387	if (vesafb_defined.bits_per_pixel <= 8) {
	388	depth = vesafb_defined.green.length;
	389	vesafb_defined.red.length =
	390	vesafb_defined.green.length =
	391	vesafb_defined.blue.length =
	392	vesafb_defined.bits_per_pixel;
	393	}
	394
	395	printk(KERN_INFO "vesafb: %s: "
	396	"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
	397	(vesafb_defined.bits_per_pixel > 8) ?
89ec4c23 AD	398	"Truecolor" : (vga_compat \|\| pmi_setpal) ?
89ec4c23 AD	399	"Pseudocolor" : "Static Pseudocolor",
1da177e4 LT	400	screen_info.rsvd_size,
	401	screen_info.red_size,
	402	screen_info.green_size,
	403	screen_info.blue_size,
	404	screen_info.rsvd_pos,
	405	screen_info.red_pos,
	406	screen_info.green_pos,
	407	screen_info.blue_pos);
	408
	409	vesafb_fix.ypanstep = ypan ? 1 : 0;
	410	vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
	411
	412	/* request failure does not faze us, as vgacon probably has this
	413	* region already (FIXME) */
	414	request_region(0x3c0, 32, "vesafb");
	415
87b81762	416	if (mtrr == 3) {
78c03717	417	unsigned int temp_size = size_total;
80625942	418
87b81762 LR	419	/* Find the largest power-of-two */
87b81762 LR	420	temp_size = roundup_pow_of_two(temp_size);
80625942	421
87b81762 LR	422	/* Try and find a power of two to add */
87b81762 LR	423	do {
127b0c94 LR	424	par->wc_cookie =
	425	arch_phys_wc_add(vesafb_fix.smem_start,
	426	temp_size);
87b81762	427	temp_size >>= 1;
127b0c94 LR	428	} while (temp_size >= PAGE_SIZE && par->wc_cookie < 0);
127b0c94 LR	429
803a4e14	430	info->screen_base = ioremap_wc(vesafb_fix.smem_start, vesafb_fix.smem_len);
87b81762	431	} else {
87b81762 LR	432	if (mtrr && mtrr != 3)
87b81762 LR	433	WARN_ONCE(1, "Only MTRR_TYPE_WRCOMB (3) make sense\n");
803a4e14	434	info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
803a4e14	435	}
87b81762	436
803a4e14 TS	437	if (!info->screen_base) {
	438	printk(KERN_ERR
	439	"vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
	440	vesafb_fix.smem_len, vesafb_fix.smem_start);
	441	err = -EIO;
	442	goto err;
	443	}
	444
	445	printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
	446	"using %dk, total %dk\n",
	447	vesafb_fix.smem_start, info->screen_base,
	448	size_remap/1024, size_total/1024);
	449
1da177e4 LT	450	info->fbops = &vesafb_ops;
	451	info->var = vesafb_defined;
	452	info->fix = vesafb_fix;
4410f391	453	info->flags = FBINFO_FLAG_DEFAULT \| FBINFO_MISC_FIRMWARE \|
b83734ec	454	(ypan ? FBINFO_HWACCEL_YPAN : 0);
1da177e4	455
e53f87a0 AD	456	if (!ypan)
	457	info->fbops->fb_pan_display = NULL;
	458
1da177e4 LT	459	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
	460	err = -ENOMEM;
	461	goto err;
	462	}
	463	if (register_framebuffer(info)<0) {
	464	err = -EINVAL;
	465	fb_dealloc_cmap(&info->cmap);
	466	goto err;
	467	}
31b6780c	468	fb_info(info, "%s frame buffer device\n", info->fix.id);
1da177e4 LT	469	return 0;
1da177e4 LT	470	err:
127b0c94	471	arch_phys_wc_del(par->wc_cookie);
b88a57cc AL	472	if (info->screen_base)
b88a57cc AL	473	iounmap(info->screen_base);
1da177e4 LT	474	framebuffer_release(info);
	475	release_mem_region(vesafb_fix.smem_start, size_total);
	476	return err;
	477	}
	478
60231da1 DH	479	static int vesafb_remove(struct platform_device *pdev)
	480	{
	481	struct fb_info *info = platform_get_drvdata(pdev);
	482
	483	unregister_framebuffer(info);
	484	framebuffer_release(info);
	485
	486	return 0;
	487	}
	488
3ae5eaec	489	static struct platform_driver vesafb_driver = {
2e5155ec DH	490	.driver = {
2e5155ec DH	491	.name = "vesa-framebuffer",
3ae5eaec	492	},
2e5155ec	493	.probe = vesafb_probe,
60231da1	494	.remove = vesafb_remove,
1da177e4 LT	495	};
1da177e4 LT	496
2e5155ec	497	module_platform_driver(vesafb_driver);
1da177e4	498	MODULE_LICENSE("GPL");