1 // SPDX-License-Identifier: GPL-2.0
5  * (c) 2006 Edgar Hucek <gimli@dark-green.com>
6  * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
12 #include <linux/efi-bgrt.h>
51 	.height			= -1,
52 	.width			= -1,
78 	if (regno >= info->cmap.len)  in efifb_setcolreg()
82 		red   >>= 16 - info->var.red.length;  in efifb_setcolreg()
83 		green >>= 16 - info->var.green.length;  in efifb_setcolreg()
84 		blue  >>= 16 - info->var.blue.length;  in efifb_setcolreg()
85 		((u32 *)(info->pseudo_palette))[regno] =  in efifb_setcolreg()
86 			(red   << info->var.red.offset)   |  in efifb_setcolreg()
87 			(green << info->var.green.offset) |  in efifb_setcolreg()
88 			(blue  << info->var.blue.offset);  in efifb_setcolreg()
105 	while (width--) {  in efifb_copy_bmp()
109 		*dst++ = (r << si->red_pos)   |  in efifb_copy_bmp()
110 			 (g << si->green_pos) |  in efifb_copy_bmp()
111 			 (b << si->blue_pos);  in efifb_copy_bmp()
117  * On x86 some firmwares use a low non native resolution for the display when
119  * for the native resolution. If the bgrt image intended for the native
120  * resolution still fits, it will be displayed very close to the right edge of
129 	u32 expected_xoffset = (si->lfb_width - bmp_width) / 2;  in efifb_bgrt_sanity_check()
147 	u8 *dst = info->screen_base;  in efifb_show_boot_graphics()
163 	if (si->lfb_depth != 32) {  in efifb_show_boot_graphics()
164 		pr_info("efifb: not 32 bits, not showing boot graphics\n");  in efifb_show_boot_graphics()
179 	if (file_header->id != 0x4d42 || file_header->reserved != 0)  in efifb_show_boot_graphics()
183 	if (dib_header->dib_header_size != 40 || dib_header->width < 0 ||  in efifb_show_boot_graphics()
184 	    dib_header->planes != 1 || dib_header->bpp != 24 ||  in efifb_show_boot_graphics()
185 	    dib_header->compression != 0)  in efifb_show_boot_graphics()
188 	bmp_width = dib_header->width;  in efifb_show_boot_graphics()
189 	bmp_height = abs(dib_header->height);  in efifb_show_boot_graphics()
191 	screen_pitch = si->lfb_linelength;  in efifb_show_boot_graphics()
193 	if ((file_header->bitmap_offset + bmp_pitch * bmp_height) >  in efifb_show_boot_graphics()
197 	if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width ||  in efifb_show_boot_graphics()
198 	    (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height)  in efifb_show_boot_graphics()
206 	for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) {  in efifb_show_boot_graphics()
210 			memset(dst, 0, 4 * si->lfb_width);  in efifb_show_boot_graphics()
214 		src_y = y - bgrt_tab.image_offset_y;  in efifb_show_boot_graphics()
216 		if (dib_header->height > 0)  in efifb_show_boot_graphics()
217 			src_y = (bmp_height - 1) - src_y;  in efifb_show_boot_graphics()
221 		efifb_copy_bmp(bgrt_image + file_header->bitmap_offset +  in efifb_show_boot_graphics()
225 		memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4);  in efifb_show_boot_graphics()
241 	if (info->screen_base) {  in efifb_destroy()
243 			iounmap(info->screen_base);  in efifb_destroy()
245 			memunmap(info->screen_base);  in efifb_destroy()
248 		release_mem_region(info->apertures->ranges[0].base,  in efifb_destroy()
249 				   info->apertures->ranges[0].size);  in efifb_destroy()
250 	fb_dealloc_cmap(&info->cmap);  in efifb_destroy()
346 		return -ENODEV;  in efifb_probe()
349 		return -ENODEV;  in efifb_probe()
357 		return -ENODEV;  in efifb_probe()
365 		return -ENODEV;  in efifb_probe()
391 	    bar_resource->start + bar_offset != efifb_fix.smem_start) {  in efifb_probe()
392 		dev_info(&efifb_pci_dev->dev,  in efifb_probe()
394 		efifb_fix.smem_start = bar_resource->start + bar_offset;  in efifb_probe()
402 	/*   size_vmode -- that is the amount of memory needed for the  in efifb_probe()
407 	/*   size_total -- all video memory we have. Used for  in efifb_probe()
414 	/*   size_remap -- the amount of video memory we are going to  in efifb_probe()
422 		size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);  in efifb_probe()
434 	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);  in efifb_probe()
437 		err = -ENOMEM;  in efifb_probe()
441 	info->pseudo_palette = info->par;  in efifb_probe()
442 	info->par = NULL;  in efifb_probe()
444 	info->apertures = alloc_apertures(1);  in efifb_probe()
445 	if (!info->apertures) {  in efifb_probe()
446 		err = -ENOMEM;  in efifb_probe()
449 	info->apertures->ranges[0].base = efifb_fix.smem_start;  in efifb_probe()
450 	info->apertures->ranges[0].size = size_remap;  in efifb_probe()
458 			err = -EIO;  in efifb_probe()
473 		info->screen_base = ioremap_wc(efifb_fix.smem_start,  in efifb_probe()
476 		info->screen_base = ioremap(efifb_fix.smem_start,  in efifb_probe()
479 		info->screen_base = memremap(efifb_fix.smem_start,  in efifb_probe()
482 		info->screen_base = memremap(efifb_fix.smem_start,  in efifb_probe()
484 	if (!info->screen_base) {  in efifb_probe()
487 		err = -EIO;  in efifb_probe()
536 	info->fbops = &efifb_ops;  in efifb_probe()
537 	info->var = efifb_defined;  in efifb_probe()
538 	info->fix = efifb_fix;  in efifb_probe()
539 	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;  in efifb_probe()
545 		info->fbcon_rotate_hint = FB_ROTATE_UR;  in efifb_probe()
548 		info->fbcon_rotate_hint = FB_ROTATE_UD;  in efifb_probe()
551 		info->fbcon_rotate_hint = FB_ROTATE_CCW;  in efifb_probe()
554 		info->fbcon_rotate_hint = FB_ROTATE_CW;  in efifb_probe()
558 	err = sysfs_create_groups(&dev->dev.kobj, efifb_groups);  in efifb_probe()
563 	err = fb_alloc_cmap(&info->cmap, 256, 0);  in efifb_probe()
573 	fb_info(info, "%s frame buffer device\n", info->fix.id);  in efifb_probe()
577 	fb_dealloc_cmap(&info->cmap);  in efifb_probe()
579 	sysfs_remove_groups(&dev->dev.kobj, efifb_groups);  in efifb_probe()
582 		iounmap(info->screen_base);  in efifb_probe()
584 		memunmap(info->screen_base);  in efifb_probe()
598 	sysfs_remove_groups(&pdev->dev.kobj, efifb_groups);  in efifb_remove()
606 		.name = "efi-framebuffer",
625 		dev_err(&dev->dev,  in record_efifb_bar_resource()
626 			"BAR %d: assigned to efifb but device is disabled!\n",  in record_efifb_bar_resource()
631 	bar_resource = &dev->resource[idx];  in record_efifb_bar_resource()
634 	dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx);  in record_efifb_bar_resource()
653 		struct resource *res = &dev->resource[i];  in efifb_fixup_resources()
655 		if (!(res->flags & IORESOURCE_MEM))  in efifb_fixup_resources()
658 		if (res->start <= base && res->end >= base + size - 1) {  in efifb_fixup_resources()
659 			record_efifb_bar_resource(dev, i, base - res->start);  in efifb_fixup_resources()