1 // SPDX-License-Identifier: GPL-2.0
3  * Framebuffer driver for mdpy (mediated virtual pci display device).
5  * See mdpy-defs.h for device specs
26 #include "mdpy-defs.h"
29 	.id		= "mdpy-fb",
36 	.height		= -1,
37 	.width		= -1,
61 	u32 *pal = info->pseudo_palette;  in mdpy_fb_setcolreg()
62 	u32 cr = red >> (16 - info->var.red.length);  in mdpy_fb_setcolreg()
63 	u32 cg = green >> (16 - info->var.green.length);  in mdpy_fb_setcolreg()
64 	u32 cb = blue >> (16 - info->var.blue.length);  in mdpy_fb_setcolreg()
68 		return -EINVAL;  in mdpy_fb_setcolreg()
70 	value = (cr << info->var.red.offset) |  in mdpy_fb_setcolreg()
71 		(cg << info->var.green.offset) |  in mdpy_fb_setcolreg()
72 		(cb << info->var.blue.offset);  in mdpy_fb_setcolreg()
73 	if (info->var.transp.length > 0) {  in mdpy_fb_setcolreg()
74 		mask = (1 << info->var.transp.length) - 1;  in mdpy_fb_setcolreg()
75 		mask <<= info->var.transp.offset;  in mdpy_fb_setcolreg()
85 	if (info->screen_base)  in mdpy_fb_destroy()
86 		iounmap(info->screen_base);  in mdpy_fb_destroy()
101 	u32 format, width, height;  in mdpy_fb_probe()  local
108 	ret = pci_request_regions(pdev, "mdpy-fb");  in mdpy_fb_probe()
113 	pci_read_config_dword(pdev, MDPY_WIDTH_OFFSET,	&width);  in mdpy_fb_probe()
118 		ret = -EINVAL;  in mdpy_fb_probe()
121 	if (width < 100	 || width > 10000) {  in mdpy_fb_probe()
122 		pci_err(pdev, "width (%d) out of range\n", width);  in mdpy_fb_probe()
123 		ret = -EINVAL;  in mdpy_fb_probe()
128 		ret = -EINVAL;  in mdpy_fb_probe()
132 		 width, height);  in mdpy_fb_probe()
134 	info = framebuffer_alloc(sizeof(struct mdpy_fb_par), &pdev->dev);  in mdpy_fb_probe()
136 		ret = -ENOMEM;  in mdpy_fb_probe()
140 	par = info->par;  in mdpy_fb_probe()
142 	info->fix = mdpy_fb_fix;  in mdpy_fb_probe()
143 	info->fix.smem_start = pci_resource_start(pdev, 0);  in mdpy_fb_probe()
144 	info->fix.smem_len = pci_resource_len(pdev, 0);  in mdpy_fb_probe()
145 	info->fix.line_length = width * 4;  in mdpy_fb_probe()
147 	info->var = mdpy_fb_var;  in mdpy_fb_probe()
148 	info->var.xres = width;  in mdpy_fb_probe()
149 	info->var.yres = height;  in mdpy_fb_probe()
150 	info->var.xres_virtual = width;  in mdpy_fb_probe()
151 	info->var.yres_virtual = height;  in mdpy_fb_probe()
153 	info->screen_size = info->fix.smem_len;  in mdpy_fb_probe()
154 	info->screen_base = ioremap(info->fix.smem_start,  in mdpy_fb_probe()
155 				    info->screen_size);  in mdpy_fb_probe()
156 	if (!info->screen_base) {  in mdpy_fb_probe()
158 		ret = -EIO;  in mdpy_fb_probe()
162 	info->fbops = &mdpy_fb_ops;  in mdpy_fb_probe()
163 	info->pseudo_palette = par->palette;  in mdpy_fb_probe()
167 		pci_err(pdev, "mdpy-fb device register failed: %d\n", ret);  in mdpy_fb_probe()
171 	pci_info(pdev, "fb%d registered\n", info->node);  in mdpy_fb_probe()
175 	iounmap(info->screen_base);  in mdpy_fb_probe()
194 	iounmap(info->screen_base);  in mdpy_fb_remove()
203 		.device	   = MDPY_PCI_DEVICE_ID,
212 	.name		= "mdpy-fb",
232 MODULE_DESCRIPTION("Framebuffer driver for mdpy (mediated virtual pci display device)");