[mirror_ubuntu-artful-kernel.git] / drivers / video / 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 pci_dev *default_vga;

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);
	framebuffer_release(info);
}

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,
};

struct pci_dev *vga_default_device(void)
{
	return default_vga;
}

EXPORT_SYMBOL_GPL(vga_default_device);

void vga_set_default_device(struct pci_dev *pdev)
{
	default_vga = pdev;
}

static int efifb_setup(char *options)
{
	char *this_opt;
	int i;
	struct pci_dev *dev = NULL;

	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);
		}
	}

	for_each_pci_dev(dev) {
		int i;

		if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
			continue;

		for (i=0; i < DEVICE_COUNT_RESOURCE; i++) {
			resource_size_t start, end;

			if (!(pci_resource_flags(dev, i) & IORESOURCE_MEM))
				continue;

			start = pci_resource_start(dev, i);
			end  = pci_resource_end(dev, i);

			if (!start || !end)
				continue;

			if (screen_info.lfb_base >= start &&
			    (screen_info.lfb_base + screen_info.lfb_size) < end)
				default_vga = dev;
		}
	}

	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;
	}
	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 struct platform_driver efifb_driver = {
	.driver = {
		.name = "efi-framebuffer",
		.owner = THIS_MODULE,
	},
	.probe = efifb_probe,
};

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
b4aa0163 MG	22	static struct pci_dev *default_vga;
b4aa0163 MG	23
48c68c4f	24	static struct fb_var_screeninfo efifb_defined = {
7c83172b HY	25	.activate = FB_ACTIVATE_NOW,
	26	.height = -1,
	27	.width = -1,
	28	.right_margin = 32,
	29	.upper_margin = 16,
	30	.lower_margin = 4,
	31	.vsync_len = 4,
	32	.vmode = FB_VMODE_NONINTERLACED,
	33	};
	34
48c68c4f	35	static struct fb_fix_screeninfo efifb_fix = {
7c83172b HY	36	.id = "EFI VGA",
	37	.type = FB_TYPE_PACKED_PIXELS,
	38	.accel = FB_ACCEL_NONE,
	39	.visual = FB_VISUAL_TRUECOLOR,
	40	};
	41
	42	static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
	43	unsigned blue, unsigned transp,
	44	struct fb_info *info)
	45	{
	46	/*
	47	* Set a single color register. The values supplied are
	48	* already rounded down to the hardware's capabilities
	49	* (according to the entries in the `var' structure). Return
	50	* != 0 for invalid regno.
	51	*/
	52
	53	if (regno >= info->cmap.len)
	54	return 1;
	55
	56	if (regno < 16) {
	57	red >>= 8;
	58	green >>= 8;
	59	blue >>= 8;
	60	((u32 *)(info->pseudo_palette))[regno] =
	61	(red << info->var.red.offset) \|
	62	(green << info->var.green.offset) \|
	63	(blue << info->var.blue.offset);
	64	}
	65	return 0;
	66	}
	67
89f3f219 MS	68	static void efifb_destroy(struct fb_info *info)
	69	{
	70	if (info->screen_base)
	71	iounmap(info->screen_base);
da0241f1 AL	72	if (request_mem_succeeded)
	73	release_mem_region(info->apertures->ranges[0].base,
	74	info->apertures->ranges[0].size);
907355a9	75	fb_dealloc_cmap(&info->cmap);
89f3f219 MS	76	framebuffer_release(info);
	77	}
	78
7c83172b HY	79	static struct fb_ops efifb_ops = {
7c83172b HY	80	.owner = THIS_MODULE,
89f3f219	81	.fb_destroy = efifb_destroy,
7c83172b HY	82	.fb_setcolreg = efifb_setcolreg,
	83	.fb_fillrect = cfb_fillrect,
	84	.fb_copyarea = cfb_copyarea,
	85	.fb_imageblit = cfb_imageblit,
	86	};
	87
b4aa0163 MG	88	struct pci_dev *vga_default_device(void)
	89	{
	90	return default_vga;
	91	}
	92
1b23170a MG	93	EXPORT_SYMBOL_GPL(vga_default_device);
1b23170a MG	94
b4aa0163 MG	95	void vga_set_default_device(struct pci_dev *pdev)
	96	{
	97	default_vga = pdev;
	98	}
	99
e6816a8d	100	static int efifb_setup(char *options)
7c08c9ae PJ	101	{
	102	char *this_opt;
	103	int i;
b4aa0163	104	struct pci_dev *dev = NULL;
7c08c9ae	105
b4aa0163 MG	106	if (options && *options) {
	107	while ((this_opt = strsep(&options, ",")) != NULL) {
	108	if (!*this_opt) continue;
7c08c9ae	109
b4aa0163	110	for (i = 0; i < M_UNKNOWN; i++) {
55aa42f2 JB	111	if (efifb_dmi_list[i].base != 0 &&
55aa42f2 JB	112	!strcmp(this_opt, efifb_dmi_list[i].optname)) {
2995e506 DH	113	screen_info.lfb_base = efifb_dmi_list[i].base;
	114	screen_info.lfb_linelength = efifb_dmi_list[i].stride;
	115	screen_info.lfb_width = efifb_dmi_list[i].width;
	116	screen_info.lfb_height = efifb_dmi_list[i].height;
b4aa0163	117	}
7c08c9ae	118	}
b4aa0163 MG	119	if (!strncmp(this_opt, "base:", 5))
	120	screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
	121	else if (!strncmp(this_opt, "stride:", 7))
	122	screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
	123	else if (!strncmp(this_opt, "height:", 7))
	124	screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
	125	else if (!strncmp(this_opt, "width:", 6))
	126	screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
7c08c9ae	127	}
7c08c9ae	128	}
b4aa0163 MG	129
	130	for_each_pci_dev(dev) {
	131	int i;
	132
	133	if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
	134	continue;
	135
	136	for (i=0; i < DEVICE_COUNT_RESOURCE; i++) {
	137	resource_size_t start, end;
	138
	139	if (!(pci_resource_flags(dev, i) & IORESOURCE_MEM))
	140	continue;
	141
	142	start = pci_resource_start(dev, i);
	143	end = pci_resource_end(dev, i);
	144
	145	if (!start \|\| !end)
	146	continue;
	147
	148	if (screen_info.lfb_base >= start &&
	149	(screen_info.lfb_base + screen_info.lfb_size) < end)
	150	default_vga = dev;
	151	}
	152	}
	153
7c08c9ae PJ	154	return 0;
	155	}
	156
e6816a8d	157	static int efifb_probe(struct platform_device *dev)
7c83172b HY	158	{
	159	struct fb_info *info;
	160	int err;
	161	unsigned int size_vmode;
	162	unsigned int size_remap;
	163	unsigned int size_total;
e6816a8d DH	164	char *option = NULL;
	165
	166	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
	167	return -ENODEV;
	168
	169	if (fb_get_options("efifb", &option))
	170	return -ENODEV;
	171	efifb_setup(option);
	172
	173	/* We don't get linelength from UGA Draw Protocol, only from
	174	* EFI Graphics Protocol. So if it's not in DMI, and it's not
	175	* passed in from the user, we really can't use the framebuffer.
	176	*/
	177	if (!screen_info.lfb_linelength)
	178	return -ENODEV;
7c08c9ae	179
7c08c9ae PJ	180	if (!screen_info.lfb_depth)
	181	screen_info.lfb_depth = 32;
	182	if (!screen_info.pages)
	183	screen_info.pages = 1;
133bb070 MG	184	if (!screen_info.lfb_base) {
	185	printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
	186	return -ENODEV;
	187	}
	188	printk(KERN_INFO "efifb: probing for efifb\n");
7c08c9ae PJ	189
	190	/* just assume they're all unset if any are */
	191	if (!screen_info.blue_size) {
	192	screen_info.blue_size = 8;
	193	screen_info.blue_pos = 0;
	194	screen_info.green_size = 8;
	195	screen_info.green_pos = 8;
	196	screen_info.red_size = 8;
	197	screen_info.red_pos = 16;
	198	screen_info.rsvd_size = 8;
	199	screen_info.rsvd_pos = 24;
	200	}
7c83172b HY	201
	202	efifb_fix.smem_start = screen_info.lfb_base;
	203	efifb_defined.bits_per_pixel = screen_info.lfb_depth;
	204	efifb_defined.xres = screen_info.lfb_width;
	205	efifb_defined.yres = screen_info.lfb_height;
	206	efifb_fix.line_length = screen_info.lfb_linelength;
	207
	208	/* size_vmode -- that is the amount of memory needed for the
	209	* used video mode, i.e. the minimum amount of
	210	* memory we need. */
	211	size_vmode = efifb_defined.yres * efifb_fix.line_length;
	212
	213	/* size_total -- all video memory we have. Used for
	214	* entries, ressource allocation and bounds
	215	* checking. */
	216	size_total = screen_info.lfb_size;
	217	if (size_total < size_vmode)
	218	size_total = size_vmode;
	219
	220	/* size_remap -- the amount of video memory we are going to
	221	* use for efifb. With modern cards it is no
	222	* option to simply use size_total as that
	223	* wastes plenty of kernel address space. */
	224	size_remap = size_vmode * 2;
7c83172b HY	225	if (size_remap > size_total)
7c83172b HY	226	size_remap = size_total;
7c08c9ae PJ	227	if (size_remap % PAGE_SIZE)
7c08c9ae PJ	228	size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
7c83172b HY	229	efifb_fix.smem_len = size_remap;
7c83172b HY	230
7c08c9ae	231	if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
da0241f1	232	request_mem_succeeded = true;
7c08c9ae	233	} else {
7c83172b HY	234	/* We cannot make this fatal. Sometimes this comes from magic
	235	spaces our resource handlers simply don't know about */
	236	printk(KERN_WARNING
	237	"efifb: cannot reserve video memory at 0x%lx\n",
	238	efifb_fix.smem_start);
7c08c9ae	239	}
7c83172b HY	240
	241	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
	242	if (!info) {
7c08c9ae	243	printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
7c83172b HY	244	err = -ENOMEM;
	245	goto err_release_mem;
	246	}
	247	info->pseudo_palette = info->par;
	248	info->par = NULL;
	249
1471ca9a MS	250	info->apertures = alloc_apertures(1);
	251	if (!info->apertures) {
	252	err = -ENOMEM;
	253	goto err_release_fb;
	254	}
	255	info->apertures->ranges[0].base = efifb_fix.smem_start;
	256	info->apertures->ranges[0].size = size_remap;
4410f391	257
3c004b4f	258	info->screen_base = ioremap_wc(efifb_fix.smem_start, efifb_fix.smem_len);
7c83172b HY	259	if (!info->screen_base) {
	260	printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
	261	"0x%x @ 0x%lx\n",
	262	efifb_fix.smem_len, efifb_fix.smem_start);
	263	err = -EIO;
7c08c9ae	264	goto err_release_fb;
7c83172b HY	265	}
	266
	267	printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
	268	"using %dk, total %dk\n",
	269	efifb_fix.smem_start, info->screen_base,
	270	size_remap/1024, size_total/1024);
	271	printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
	272	efifb_defined.xres, efifb_defined.yres,
	273	efifb_defined.bits_per_pixel, efifb_fix.line_length,
	274	screen_info.pages);
	275
	276	efifb_defined.xres_virtual = efifb_defined.xres;
	277	efifb_defined.yres_virtual = efifb_fix.smem_len /
	278	efifb_fix.line_length;
	279	printk(KERN_INFO "efifb: scrolling: redraw\n");
	280	efifb_defined.yres_virtual = efifb_defined.yres;
	281
	282	/* some dummy values for timing to make fbset happy */
	283	efifb_defined.pixclock = 10000000 / efifb_defined.xres *
	284	1000 / efifb_defined.yres;
	285	efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
	286	efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
	287
	288	efifb_defined.red.offset = screen_info.red_pos;
	289	efifb_defined.red.length = screen_info.red_size;
	290	efifb_defined.green.offset = screen_info.green_pos;
	291	efifb_defined.green.length = screen_info.green_size;
	292	efifb_defined.blue.offset = screen_info.blue_pos;
	293	efifb_defined.blue.length = screen_info.blue_size;
	294	efifb_defined.transp.offset = screen_info.rsvd_pos;
	295	efifb_defined.transp.length = screen_info.rsvd_size;
	296
	297	printk(KERN_INFO "efifb: %s: "
	298	"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
	299	"Truecolor",
	300	screen_info.rsvd_size,
	301	screen_info.red_size,
	302	screen_info.green_size,
	303	screen_info.blue_size,
	304	screen_info.rsvd_pos,
	305	screen_info.red_pos,
	306	screen_info.green_pos,
	307	screen_info.blue_pos);
	308
	309	efifb_fix.ypanstep = 0;
	310	efifb_fix.ywrapstep = 0;
	311
	312	info->fbops = &efifb_ops;
	313	info->var = efifb_defined;
	314	info->fix = efifb_fix;
4410f391	315	info->flags = FBINFO_FLAG_DEFAULT \| FBINFO_MISC_FIRMWARE;
7c83172b	316
7c08c9ae PJ	317	if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
7c08c9ae PJ	318	printk(KERN_ERR "efifb: cannot allocate colormap\n");
7c83172b HY	319	goto err_unmap;
7c83172b HY	320	}
7c08c9ae PJ	321	if ((err = register_framebuffer(info)) < 0) {
7c08c9ae PJ	322	printk(KERN_ERR "efifb: cannot register framebuffer\n");
7c83172b HY	323	goto err_fb_dealoc;
7c83172b HY	324	}
31b6780c	325	fb_info(info, "%s frame buffer device\n", info->fix.id);
7c83172b HY	326	return 0;
	327
	328	err_fb_dealoc:
	329	fb_dealloc_cmap(&info->cmap);
	330	err_unmap:
	331	iounmap(info->screen_base);
7c08c9ae	332	err_release_fb:
7c83172b HY	333	framebuffer_release(info);
7c83172b HY	334	err_release_mem:
da0241f1	335	if (request_mem_succeeded)
7c08c9ae	336	release_mem_region(efifb_fix.smem_start, size_total);
7c83172b HY	337	return err;
	338	}
	339
	340	static struct platform_driver efifb_driver = {
e6816a8d DH	341	.driver = {
	342	.name = "efi-framebuffer",
	343	.owner = THIS_MODULE,
7c83172b	344	},
e6816a8d	345	.probe = efifb_probe,
7c83172b HY	346	};
7c83172b HY	347
e6816a8d	348	module_platform_driver(efifb_driver);
7c83172b	349	MODULE_LICENSE("GPL");