[mirror_ubuntu-artful-kernel.git] / drivers / video / fbdev / efifb.c

/*
 * Framebuffer driver for EFI/UEFI based system
 *
 * (c) 2006 Edgar Hucek <gimli@dark-green.com>
 * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <video/vga.h>
#include <asm/sysfb.h>

static bool request_mem_succeeded = false;

static struct fb_var_screeninfo efifb_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 efifb_fix = {
	.id			= "EFI VGA",
	.type			= FB_TYPE_PACKED_PIXELS,
	.accel			= FB_ACCEL_NONE,
	.visual			= FB_VISUAL_TRUECOLOR,
};

static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
			   unsigned blue, unsigned transp,
			   struct fb_info *info)
{
	/*
	 *  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 (regno < 16) {
		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);
	}
	return 0;
}

static void efifb_destroy(struct fb_info *info)
{
	if (info->screen_base)
		iounmap(info->screen_base);
	if (request_mem_succeeded)
		release_mem_region(info->apertures->ranges[0].base,
				   info->apertures->ranges[0].size);
	fb_dealloc_cmap(&info->cmap);
}

static struct fb_ops efifb_ops = {
	.owner		= THIS_MODULE,
	.fb_destroy	= efifb_destroy,
	.fb_setcolreg	= efifb_setcolreg,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};

static int efifb_setup(char *options)
{
	char *this_opt;
	int i;

	if (options && *options) {
		while ((this_opt = strsep(&options, ",")) != NULL) {
			if (!*this_opt) continue;

			for (i = 0; i < M_UNKNOWN; i++) {
				if (efifb_dmi_list[i].base != 0 &&
				    !strcmp(this_opt, efifb_dmi_list[i].optname)) {
					screen_info.lfb_base = efifb_dmi_list[i].base;
					screen_info.lfb_linelength = efifb_dmi_list[i].stride;
					screen_info.lfb_width = efifb_dmi_list[i].width;
					screen_info.lfb_height = efifb_dmi_list[i].height;
				}
			}
			if (!strncmp(this_opt, "base:", 5))
				screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
			else if (!strncmp(this_opt, "stride:", 7))
				screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
			else if (!strncmp(this_opt, "height:", 7))
				screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
			else if (!strncmp(this_opt, "width:", 6))
				screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
		}
	}

	return 0;
}

static int efifb_probe(struct platform_device *dev)
{
	struct fb_info *info;
	int err;
	unsigned int size_vmode;
	unsigned int size_remap;
	unsigned int size_total;
	char *option = NULL;

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

	if (fb_get_options("efifb", &option))
		return -ENODEV;
	efifb_setup(option);

	/* We don't get linelength from UGA Draw Protocol, only from
	 * EFI Graphics Protocol.  So if it's not in DMI, and it's not
	 * passed in from the user, we really can't use the framebuffer.
	 */
	if (!screen_info.lfb_linelength)
		return -ENODEV;

	if (!screen_info.lfb_depth)
		screen_info.lfb_depth = 32;
	if (!screen_info.pages)
		screen_info.pages = 1;
	if (!screen_info.lfb_base) {
		printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
		return -ENODEV;
	}
	printk(KERN_INFO "efifb: probing for efifb\n");

	/* just assume they're all unset if any are */
	if (!screen_info.blue_size) {
		screen_info.blue_size = 8;
		screen_info.blue_pos = 0;
		screen_info.green_size = 8;
		screen_info.green_pos = 8;
		screen_info.red_size = 8;
		screen_info.red_pos = 16;
		screen_info.rsvd_size = 8;
		screen_info.rsvd_pos = 24;
	}

	efifb_fix.smem_start = screen_info.lfb_base;
	efifb_defined.bits_per_pixel = screen_info.lfb_depth;
	efifb_defined.xres = screen_info.lfb_width;
	efifb_defined.yres = screen_info.lfb_height;
	efifb_fix.line_length = screen_info.lfb_linelength;

	/*   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 = efifb_defined.yres * efifb_fix.line_length;

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

	/*   size_remap -- the amount of video memory we are going to
	 *                 use for efifb.  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 (size_remap > size_total)
		size_remap = size_total;
	if (size_remap % PAGE_SIZE)
		size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
	efifb_fix.smem_len = size_remap;

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

	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
	if (!info) {
		printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
		err = -ENOMEM;
		goto err_release_mem;
	}
	platform_set_drvdata(dev, info);
	info->pseudo_palette = info->par;
	info->par = NULL;

	info->apertures = alloc_apertures(1);
	if (!info->apertures) {
		err = -ENOMEM;
		goto err_release_fb;
	}
	info->apertures->ranges[0].base = efifb_fix.smem_start;
	info->apertures->ranges[0].size = size_remap;

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

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

	efifb_defined.xres_virtual = efifb_defined.xres;
	efifb_defined.yres_virtual = efifb_fix.smem_len /
					efifb_fix.line_length;
	printk(KERN_INFO "efifb: scrolling: redraw\n");
	efifb_defined.yres_virtual = efifb_defined.yres;

	/* some dummy values for timing to make fbset happy */
	efifb_defined.pixclock     = 10000000 / efifb_defined.xres *
					1000 / efifb_defined.yres;
	efifb_defined.left_margin  = (efifb_defined.xres / 8) & 0xf8;
	efifb_defined.hsync_len    = (efifb_defined.xres / 8) & 0xf8;

	efifb_defined.red.offset    = screen_info.red_pos;
	efifb_defined.red.length    = screen_info.red_size;
	efifb_defined.green.offset  = screen_info.green_pos;
	efifb_defined.green.length  = screen_info.green_size;
	efifb_defined.blue.offset   = screen_info.blue_pos;
	efifb_defined.blue.length   = screen_info.blue_size;
	efifb_defined.transp.offset = screen_info.rsvd_pos;
	efifb_defined.transp.length = screen_info.rsvd_size;

	printk(KERN_INFO "efifb: %s: "
	       "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
	       "Truecolor",
	       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);

	efifb_fix.ypanstep  = 0;
	efifb_fix.ywrapstep = 0;

	info->fbops = &efifb_ops;
	info->var = efifb_defined;
	info->fix = efifb_fix;
	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;

	if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
		printk(KERN_ERR "efifb: cannot allocate colormap\n");
		goto err_unmap;
	}
	if ((err = register_framebuffer(info)) < 0) {
		printk(KERN_ERR "efifb: cannot register framebuffer\n");
		goto err_fb_dealoc;
	}
	fb_info(info, "%s frame buffer device\n", info->fix.id);
	return 0;

err_fb_dealoc:
	fb_dealloc_cmap(&info->cmap);
err_unmap:
	iounmap(info->screen_base);
err_release_fb:
	framebuffer_release(info);
err_release_mem:
	if (request_mem_succeeded)
		release_mem_region(efifb_fix.smem_start, size_total);
	return err;
}

static int efifb_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 efifb_driver = {
	.driver = {
		.name = "efi-framebuffer",
	},
	.probe = efifb_probe,
	.remove = efifb_remove,
};

module_platform_driver(efifb_driver);
MODULE_LICENSE("GPL");
Commit	Line	Data
7c83172b HY	1	/*
	2	* Framebuffer driver for EFI/UEFI based system
	3	*
	4	* (c) 2006 Edgar Hucek <gimli@dark-green.com>
	5	* Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
	6	*
	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/kernel.h>
	11	#include <linux/errno.h>
	12	#include <linux/fb.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/screen_info.h>
7c08c9ae	15	#include <linux/dmi.h>
85a00d9b	16	#include <linux/pci.h>
7c83172b	17	#include <video/vga.h>
2995e506	18	#include <asm/sysfb.h>
7c83172b	19
da0241f1 AL	20	static bool request_mem_succeeded = false;
da0241f1 AL	21
48c68c4f	22	static struct fb_var_screeninfo efifb_defined = {
7c83172b HY	23	.activate = FB_ACTIVATE_NOW,
	24	.height = -1,
	25	.width = -1,
	26	.right_margin = 32,
	27	.upper_margin = 16,
	28	.lower_margin = 4,
	29	.vsync_len = 4,
	30	.vmode = FB_VMODE_NONINTERLACED,
	31	};
	32
48c68c4f	33	static struct fb_fix_screeninfo efifb_fix = {
7c83172b HY	34	.id = "EFI VGA",
	35	.type = FB_TYPE_PACKED_PIXELS,
	36	.accel = FB_ACCEL_NONE,
	37	.visual = FB_VISUAL_TRUECOLOR,
	38	};
	39
	40	static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
	41	unsigned blue, unsigned transp,
	42	struct fb_info *info)
	43	{
	44	/*
	45	* Set a single color register. The values supplied are
	46	* already rounded down to the hardware's capabilities
	47	* (according to the entries in the `var' structure). Return
	48	* != 0 for invalid regno.
	49	*/
	50
	51	if (regno >= info->cmap.len)
	52	return 1;
	53
	54	if (regno < 16) {
	55	red >>= 8;
	56	green >>= 8;
	57	blue >>= 8;
	58	((u32 *)(info->pseudo_palette))[regno] =
	59	(red << info->var.red.offset) \|
	60	(green << info->var.green.offset) \|
	61	(blue << info->var.blue.offset);
	62	}
	63	return 0;
	64	}
	65
89f3f219 MS	66	static void efifb_destroy(struct fb_info *info)
	67	{
	68	if (info->screen_base)
	69	iounmap(info->screen_base);
da0241f1 AL	70	if (request_mem_succeeded)
	71	release_mem_region(info->apertures->ranges[0].base,
	72	info->apertures->ranges[0].size);
907355a9	73	fb_dealloc_cmap(&info->cmap);
89f3f219 MS	74	}
89f3f219 MS	75
7c83172b HY	76	static struct fb_ops efifb_ops = {
7c83172b HY	77	.owner = THIS_MODULE,
89f3f219	78	.fb_destroy = efifb_destroy,
7c83172b HY	79	.fb_setcolreg = efifb_setcolreg,
	80	.fb_fillrect = cfb_fillrect,
	81	.fb_copyarea = cfb_copyarea,
	82	.fb_imageblit = cfb_imageblit,
	83	};
	84
e6816a8d	85	static int efifb_setup(char *options)
7c08c9ae PJ	86	{
	87	char *this_opt;
	88	int i;
	89
b4aa0163 MG	90	if (options && *options) {
	91	while ((this_opt = strsep(&options, ",")) != NULL) {
	92	if (!*this_opt) continue;
7c08c9ae	93
b4aa0163	94	for (i = 0; i < M_UNKNOWN; i++) {
55aa42f2 JB	95	if (efifb_dmi_list[i].base != 0 &&
55aa42f2 JB	96	!strcmp(this_opt, efifb_dmi_list[i].optname)) {
2995e506 DH	97	screen_info.lfb_base = efifb_dmi_list[i].base;
	98	screen_info.lfb_linelength = efifb_dmi_list[i].stride;
	99	screen_info.lfb_width = efifb_dmi_list[i].width;
	100	screen_info.lfb_height = efifb_dmi_list[i].height;
b4aa0163	101	}
7c08c9ae	102	}
b4aa0163 MG	103	if (!strncmp(this_opt, "base:", 5))
	104	screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
	105	else if (!strncmp(this_opt, "stride:", 7))
	106	screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
	107	else if (!strncmp(this_opt, "height:", 7))
	108	screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
	109	else if (!strncmp(this_opt, "width:", 6))
	110	screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
7c08c9ae	111	}
7c08c9ae	112	}
b4aa0163	113
7c08c9ae PJ	114	return 0;
	115	}
	116
e6816a8d	117	static int efifb_probe(struct platform_device *dev)
7c83172b HY	118	{
	119	struct fb_info *info;
	120	int err;
	121	unsigned int size_vmode;
	122	unsigned int size_remap;
	123	unsigned int size_total;
e6816a8d DH	124	char *option = NULL;
	125
	126	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
	127	return -ENODEV;
	128
	129	if (fb_get_options("efifb", &option))
	130	return -ENODEV;
	131	efifb_setup(option);
	132
	133	/* We don't get linelength from UGA Draw Protocol, only from
	134	* EFI Graphics Protocol. So if it's not in DMI, and it's not
	135	* passed in from the user, we really can't use the framebuffer.
	136	*/
	137	if (!screen_info.lfb_linelength)
	138	return -ENODEV;
7c08c9ae	139
7c08c9ae PJ	140	if (!screen_info.lfb_depth)
	141	screen_info.lfb_depth = 32;
	142	if (!screen_info.pages)
	143	screen_info.pages = 1;
133bb070 MG	144	if (!screen_info.lfb_base) {
	145	printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
	146	return -ENODEV;
	147	}
	148	printk(KERN_INFO "efifb: probing for efifb\n");
7c08c9ae PJ	149
	150	/* just assume they're all unset if any are */
	151	if (!screen_info.blue_size) {
	152	screen_info.blue_size = 8;
	153	screen_info.blue_pos = 0;
	154	screen_info.green_size = 8;
	155	screen_info.green_pos = 8;
	156	screen_info.red_size = 8;
	157	screen_info.red_pos = 16;
	158	screen_info.rsvd_size = 8;
	159	screen_info.rsvd_pos = 24;
	160	}
7c83172b HY	161
	162	efifb_fix.smem_start = screen_info.lfb_base;
	163	efifb_defined.bits_per_pixel = screen_info.lfb_depth;
	164	efifb_defined.xres = screen_info.lfb_width;
	165	efifb_defined.yres = screen_info.lfb_height;
	166	efifb_fix.line_length = screen_info.lfb_linelength;
	167
	168	/* size_vmode -- that is the amount of memory needed for the
	169	* used video mode, i.e. the minimum amount of
	170	* memory we need. */
	171	size_vmode = efifb_defined.yres * efifb_fix.line_length;
	172
	173	/* size_total -- all video memory we have. Used for
	174	* entries, ressource allocation and bounds
	175	* checking. */
	176	size_total = screen_info.lfb_size;
	177	if (size_total < size_vmode)
	178	size_total = size_vmode;
	179
	180	/* size_remap -- the amount of video memory we are going to
	181	* use for efifb. With modern cards it is no
	182	* option to simply use size_total as that
	183	* wastes plenty of kernel address space. */
	184	size_remap = size_vmode * 2;
7c83172b HY	185	if (size_remap > size_total)
7c83172b HY	186	size_remap = size_total;
7c08c9ae PJ	187	if (size_remap % PAGE_SIZE)
7c08c9ae PJ	188	size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
7c83172b HY	189	efifb_fix.smem_len = size_remap;
7c83172b HY	190
7c08c9ae	191	if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
da0241f1	192	request_mem_succeeded = true;
7c08c9ae	193	} else {
7c83172b HY	194	/* We cannot make this fatal. Sometimes this comes from magic
	195	spaces our resource handlers simply don't know about */
	196	printk(KERN_WARNING
	197	"efifb: cannot reserve video memory at 0x%lx\n",
	198	efifb_fix.smem_start);
7c08c9ae	199	}
7c83172b HY	200
	201	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
	202	if (!info) {
7c08c9ae	203	printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
7c83172b HY	204	err = -ENOMEM;
	205	goto err_release_mem;
	206	}
65b4021e	207	platform_set_drvdata(dev, info);
7c83172b HY	208	info->pseudo_palette = info->par;
	209	info->par = NULL;
	210
1471ca9a MS	211	info->apertures = alloc_apertures(1);
	212	if (!info->apertures) {
	213	err = -ENOMEM;
	214	goto err_release_fb;
	215	}
	216	info->apertures->ranges[0].base = efifb_fix.smem_start;
	217	info->apertures->ranges[0].size = size_remap;
4410f391	218
3c004b4f	219	info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len);
7c83172b HY	220	if (!info->screen_base) {
	221	printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
	222	"0x%x @ 0x%lx\n",
	223	efifb_fix.smem_len, efifb_fix.smem_start);
	224	err = -EIO;
7c08c9ae	225	goto err_release_fb;
7c83172b HY	226	}
	227
	228	printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
	229	"using %dk, total %dk\n",
	230	efifb_fix.smem_start, info->screen_base,
	231	size_remap/1024, size_total/1024);
	232	printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
	233	efifb_defined.xres, efifb_defined.yres,
	234	efifb_defined.bits_per_pixel, efifb_fix.line_length,
	235	screen_info.pages);
	236
	237	efifb_defined.xres_virtual = efifb_defined.xres;
	238	efifb_defined.yres_virtual = efifb_fix.smem_len /
	239	efifb_fix.line_length;
	240	printk(KERN_INFO "efifb: scrolling: redraw\n");
	241	efifb_defined.yres_virtual = efifb_defined.yres;
	242
	243	/* some dummy values for timing to make fbset happy */
	244	efifb_defined.pixclock = 10000000 / efifb_defined.xres *
	245	1000 / efifb_defined.yres;
	246	efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
	247	efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
	248
	249	efifb_defined.red.offset = screen_info.red_pos;
	250	efifb_defined.red.length = screen_info.red_size;
	251	efifb_defined.green.offset = screen_info.green_pos;
	252	efifb_defined.green.length = screen_info.green_size;
	253	efifb_defined.blue.offset = screen_info.blue_pos;
	254	efifb_defined.blue.length = screen_info.blue_size;
	255	efifb_defined.transp.offset = screen_info.rsvd_pos;
	256	efifb_defined.transp.length = screen_info.rsvd_size;
	257
	258	printk(KERN_INFO "efifb: %s: "
	259	"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
	260	"Truecolor",
	261	screen_info.rsvd_size,
	262	screen_info.red_size,
	263	screen_info.green_size,
	264	screen_info.blue_size,
	265	screen_info.rsvd_pos,
	266	screen_info.red_pos,
	267	screen_info.green_pos,
	268	screen_info.blue_pos);
	269
	270	efifb_fix.ypanstep = 0;
	271	efifb_fix.ywrapstep = 0;
	272
	273	info->fbops = &efifb_ops;
	274	info->var = efifb_defined;
	275	info->fix = efifb_fix;
4410f391	276	info->flags = FBINFO_FLAG_DEFAULT \| FBINFO_MISC_FIRMWARE;
7c83172b	277
7c08c9ae PJ	278	if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
7c08c9ae PJ	279	printk(KERN_ERR "efifb: cannot allocate colormap\n");
7c83172b HY	280	goto err_unmap;
7c83172b HY	281	}
7c08c9ae PJ	282	if ((err = register_framebuffer(info)) < 0) {
7c08c9ae PJ	283	printk(KERN_ERR "efifb: cannot register framebuffer\n");
7c83172b HY	284	goto err_fb_dealoc;
7c83172b HY	285	}
31b6780c	286	fb_info(info, "%s frame buffer device\n", info->fix.id);
7c83172b HY	287	return 0;
	288
	289	err_fb_dealoc:
	290	fb_dealloc_cmap(&info->cmap);
	291	err_unmap:
	292	iounmap(info->screen_base);
7c08c9ae	293	err_release_fb:
7c83172b HY	294	framebuffer_release(info);
7c83172b HY	295	err_release_mem:
da0241f1	296	if (request_mem_succeeded)
7c08c9ae	297	release_mem_region(efifb_fix.smem_start, size_total);
7c83172b HY	298	return err;
	299	}
	300
65b4021e DH	301	static int efifb_remove(struct platform_device *pdev)
	302	{
	303	struct fb_info *info = platform_get_drvdata(pdev);
	304
	305	unregister_framebuffer(info);
	306	framebuffer_release(info);
	307
	308	return 0;
	309	}
	310
7c83172b	311	static struct platform_driver efifb_driver = {
e6816a8d DH	312	.driver = {
e6816a8d DH	313	.name = "efi-framebuffer",
7c83172b	314	},
e6816a8d	315	.probe = efifb_probe,
65b4021e	316	.remove = efifb_remove,
7c83172b HY	317	};
7c83172b HY	318
e6816a8d	319	module_platform_driver(efifb_driver);
7c83172b	320	MODULE_LICENSE("GPL");