1 // SPDX-License-Identifier: GPL-2.0
5  * (c) 2006 Edgar Hucek <gimli@dark-green.com>
6  * Original efi driver written by Gerd Knorr <[email protected]-berlin.de>
13 #include <linux/efi-bgrt.h>
57 	.height			= -1,
58 	.width			= -1,
84 	if (regno >= info->cmap.len)  in efifb_setcolreg()
88 		red   >>= 16 - info->var.red.length;  in efifb_setcolreg()
89 		green >>= 16 - info->var.green.length;  in efifb_setcolreg()
90 		blue  >>= 16 - info->var.blue.length;  in efifb_setcolreg()
91 		((u32 *)(info->pseudo_palette))[regno] =  in efifb_setcolreg()
92 			(red   << info->var.red.offset)   |  in efifb_setcolreg()
93 			(green << info->var.green.offset) |  in efifb_setcolreg()
94 			(blue  << info->var.blue.offset);  in efifb_setcolreg()
111 	while (width--) {  in efifb_copy_bmp()
115 		*dst++ = (r << si->red_pos)   |  in efifb_copy_bmp()
116 			 (g << si->green_pos) |  in efifb_copy_bmp()
117 			 (b << si->blue_pos);  in efifb_copy_bmp()
135 	u32 expected_xoffset = (si->lfb_width - bmp_width) / 2;  in efifb_bgrt_sanity_check()
152 	u8 *dst = info->screen_base;  in efifb_show_boot_graphics()
173 	if (si->lfb_depth != 32) {  in efifb_show_boot_graphics()
189 	if (file_header->id != 0x4d42 || file_header->reserved != 0)  in efifb_show_boot_graphics()
193 	if (dib_header->dib_header_size != 40 || dib_header->width < 0 ||  in efifb_show_boot_graphics()
194 	    dib_header->planes != 1 || dib_header->bpp != 24 ||  in efifb_show_boot_graphics()
195 	    dib_header->compression != 0)  in efifb_show_boot_graphics()
198 	bmp_width = dib_header->width;  in efifb_show_boot_graphics()
199 	bmp_height = abs(dib_header->height);  in efifb_show_boot_graphics()
202 	if ((file_header->bitmap_offset + bmp_pitch * bmp_height) >  in efifb_show_boot_graphics()
206 	if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width ||  in efifb_show_boot_graphics()
207 	    (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height)  in efifb_show_boot_graphics()
215 	for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) {  in efifb_show_boot_graphics()
219 			memset(dst, 0, 4 * si->lfb_width);  in efifb_show_boot_graphics()
223 		src_y = y - bgrt_tab.image_offset_y;  in efifb_show_boot_graphics()
224 		/* Positive header height means upside down row order */  in efifb_show_boot_graphics()
225 		if (dib_header->height > 0)  in efifb_show_boot_graphics()
226 			src_y = (bmp_height - 1) - src_y;  in efifb_show_boot_graphics()
230 		efifb_copy_bmp(bgrt_image + file_header->bitmap_offset +  in efifb_show_boot_graphics()
234 		memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4);  in efifb_show_boot_graphics()
255 	struct efifb_par *par = info->par;  in efifb_destroy()
257 	if (info->screen_base) {  in efifb_destroy()
259 			iounmap(info->screen_base);  in efifb_destroy()
261 			memunmap(info->screen_base);  in efifb_destroy()
265 		release_mem_region(par->base, par->size);  in efifb_destroy()
266 	fb_dealloc_cmap(&info->cmap);  in efifb_destroy()
289 				si->lfb_base = simple_strtoul(this_opt+5, NULL, 0);  in efifb_setup()
290 			else if (!strncmp(this_opt, "stride:", 7))  in efifb_setup()
291 				si->lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;  in efifb_setup()
293 				si->lfb_height = simple_strtoul(this_opt+7, NULL, 0);  in efifb_setup()
295 				si->lfb_width = simple_strtoul(this_opt+6, NULL, 0);  in efifb_setup()
306 	if (si->lfb_base)  in fb_base_is_valid()
309 	if (!(si->capabilities & VIDEO_CAPABILITY_64BIT_BASE))  in fb_base_is_valid()
312 	if (si->ext_lfb_base)  in fb_base_is_valid()
325 		return -ENODEV;						\
326 	return sprintf(buf, fmt "\n", (si->lfb_##name));		\
363 	si = dev_get_platdata(&dev->dev);  in efifb_probe()
365 		return -ENODEV;  in efifb_probe()
366 	si = devm_kmemdup(&dev->dev, si, sizeof(*si), GFP_KERNEL);  in efifb_probe()
368 		return -ENOMEM;  in efifb_probe()
370 	dev_set_drvdata(&dev->dev, si);  in efifb_probe()
372 	if (si->orig_video_isVGA != VIDEO_TYPE_EFI)  in efifb_probe()
373 		return -ENODEV;  in efifb_probe()
376 		return -ENODEV;  in efifb_probe()
383 	if (!si->lfb_linelength)  in efifb_probe()
384 		return -ENODEV;  in efifb_probe()
386 	if (!si->lfb_depth)  in efifb_probe()
387 		si->lfb_depth = 32;  in efifb_probe()
388 	if (!si->pages)  in efifb_probe()
389 		si->pages = 1;  in efifb_probe()
392 		return -ENODEV;  in efifb_probe()
397 	if (!si->blue_size) {  in efifb_probe()
398 		si->blue_size = 8;  in efifb_probe()
399 		si->blue_pos = 0;  in efifb_probe()
400 		si->green_size = 8;  in efifb_probe()
401 		si->green_pos = 8;  in efifb_probe()
402 		si->red_size = 8;  in efifb_probe()
403 		si->red_pos = 16;  in efifb_probe()
404 		si->rsvd_size = 8;  in efifb_probe()
405 		si->rsvd_pos = 24;  in efifb_probe()
410 	efifb_defined.bits_per_pixel = si->lfb_depth;  in efifb_probe()
411 	efifb_defined.xres = si->lfb_width;  in efifb_probe()
412 	efifb_defined.yres = si->lfb_height;  in efifb_probe()
413 	efifb_fix.line_length = si->lfb_linelength;  in efifb_probe()
415 	/*   size_vmode -- that is the amount of memory needed for the  in efifb_probe()
420 	/*   size_total -- all video memory we have. Used for  in efifb_probe()
423 	size_total = si->lfb_size;  in efifb_probe()
427 	/*   size_remap -- the amount of video memory we are going to  in efifb_probe()
435 		size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);  in efifb_probe()
447 	info = framebuffer_alloc(sizeof(*par), &dev->dev);  in efifb_probe()
449 		err = -ENOMEM;  in efifb_probe()
452 	par = info->par;  in efifb_probe()
453 	info->pseudo_palette = par->pseudo_palette;  in efifb_probe()
455 	par->base = efifb_fix.smem_start;  in efifb_probe()
456 	par->size = size_remap;  in efifb_probe()
464 			err = -EIO;  in efifb_probe()
479 		info->screen_base = ioremap_wc(efifb_fix.smem_start,  in efifb_probe()
482 		info->screen_base = ioremap(efifb_fix.smem_start,  in efifb_probe()
485 		info->screen_base = memremap(efifb_fix.smem_start,  in efifb_probe()
488 		info->screen_base = memremap(efifb_fix.smem_start,  in efifb_probe()
490 	if (!info->screen_base) {  in efifb_probe()
493 		err = -EIO;  in efifb_probe()
504 	       si->pages);  in efifb_probe()
518 	efifb_defined.red.offset    = si->red_pos;  in efifb_probe()
519 	efifb_defined.red.length    = si->red_size;  in efifb_probe()
520 	efifb_defined.green.offset  = si->green_pos;  in efifb_probe()
521 	efifb_defined.green.length  = si->green_size;  in efifb_probe()
522 	efifb_defined.blue.offset   = si->blue_pos;  in efifb_probe()
523 	efifb_defined.blue.length   = si->blue_size;  in efifb_probe()
524 	efifb_defined.transp.offset = si->rsvd_pos;  in efifb_probe()
525 	efifb_defined.transp.length = si->rsvd_size;  in efifb_probe()
530 	       si->rsvd_size,  in efifb_probe()
531 	       si->red_size,  in efifb_probe()
532 	       si->green_size,  in efifb_probe()
533 	       si->blue_size,  in efifb_probe()
534 	       si->rsvd_pos,  in efifb_probe()
535 	       si->red_pos,  in efifb_probe()
536 	       si->green_pos,  in efifb_probe()
537 	       si->blue_pos);  in efifb_probe()
542 	info->fbops = &efifb_ops;  in efifb_probe()
543 	info->var = efifb_defined;  in efifb_probe()
544 	info->fix = efifb_fix;  in efifb_probe()
550 		info->fbcon_rotate_hint = FB_ROTATE_UR;  in efifb_probe()
553 		info->fbcon_rotate_hint = FB_ROTATE_UD;  in efifb_probe()
556 		info->fbcon_rotate_hint = FB_ROTATE_CCW;  in efifb_probe()
559 		info->fbcon_rotate_hint = FB_ROTATE_CW;  in efifb_probe()
563 	err = fb_alloc_cmap(&info->cmap, 256, 0);  in efifb_probe()
569 	err = devm_aperture_acquire_for_platform_device(dev, par->base, par->size);  in efifb_probe()
574 	err = devm_register_framebuffer(&dev->dev, info);  in efifb_probe()
579 	fb_info(info, "%s frame buffer device\n", info->fix.id);  in efifb_probe()
583 	fb_dealloc_cmap(&info->cmap);  in efifb_probe()
586 		iounmap(info->screen_base);  in efifb_probe()
588 		memunmap(info->screen_base);  in efifb_probe()
599 		.name = "efi-framebuffer",