1 /* s3d.c: Sun 3DLABS XVR-2500 et al. driver for sparc64 systems
2  *
3  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
4  */
5 
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/fb.h>
9 #include <linux/pci.h>
10 #include <linux/init.h>
11 #include <linux/of_device.h>
12 
13 #include <asm/io.h>
14 
15 struct s3d_info {
16 	struct fb_info		*info;
17 	struct pci_dev		*pdev;
18 
19 	char __iomem		*fb_base;
20 	unsigned long		fb_base_phys;
21 
22 	struct device_node	*of_node;
23 
24 	unsigned int		width;
25 	unsigned int		height;
26 	unsigned int		depth;
27 	unsigned int		fb_size;
28 
29 	u32			pseudo_palette[16];
30 };
31 
s3d_get_props(struct s3d_info * sp)32 static int __devinit s3d_get_props(struct s3d_info *sp)
33 {
34 	sp->width = of_getintprop_default(sp->of_node, "width", 0);
35 	sp->height = of_getintprop_default(sp->of_node, "height", 0);
36 	sp->depth = of_getintprop_default(sp->of_node, "depth", 8);
37 
38 	if (!sp->width || !sp->height) {
39 		printk(KERN_ERR "s3d: Critical properties missing for %s\n",
40 		       pci_name(sp->pdev));
41 		return -EINVAL;
42 	}
43 
44 	return 0;
45 }
46 
s3d_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)47 static int s3d_setcolreg(unsigned regno,
48 			 unsigned red, unsigned green, unsigned blue,
49 			 unsigned transp, struct fb_info *info)
50 {
51 	u32 value;
52 
53 	if (regno < 16) {
54 		red >>= 8;
55 		green >>= 8;
56 		blue >>= 8;
57 
58 		value = (blue << 24) | (green << 16) | (red << 8);
59 		((u32 *)info->pseudo_palette)[regno] = value;
60 	}
61 
62 	return 0;
63 }
64 
65 static struct fb_ops s3d_ops = {
66 	.owner			= THIS_MODULE,
67 	.fb_setcolreg		= s3d_setcolreg,
68 	.fb_fillrect		= cfb_fillrect,
69 	.fb_copyarea		= cfb_copyarea,
70 	.fb_imageblit		= cfb_imageblit,
71 };
72 
s3d_set_fbinfo(struct s3d_info * sp)73 static int __devinit s3d_set_fbinfo(struct s3d_info *sp)
74 {
75 	struct fb_info *info = sp->info;
76 	struct fb_var_screeninfo *var = &info->var;
77 
78 	info->flags = FBINFO_DEFAULT;
79 	info->fbops = &s3d_ops;
80 	info->screen_base = sp->fb_base;
81 	info->screen_size = sp->fb_size;
82 
83 	info->pseudo_palette = sp->pseudo_palette;
84 
85 	/* Fill fix common fields */
86 	strlcpy(info->fix.id, "s3d", sizeof(info->fix.id));
87         info->fix.smem_start = sp->fb_base_phys;
88         info->fix.smem_len = sp->fb_size;
89         info->fix.type = FB_TYPE_PACKED_PIXELS;
90 	if (sp->depth == 32 || sp->depth == 24)
91 		info->fix.visual = FB_VISUAL_TRUECOLOR;
92 	else
93 		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
94 
95 	var->xres = sp->width;
96 	var->yres = sp->height;
97 	var->xres_virtual = var->xres;
98 	var->yres_virtual = var->yres;
99 	var->bits_per_pixel = sp->depth;
100 
101 	var->red.offset = 8;
102 	var->red.length = 8;
103 	var->green.offset = 16;
104 	var->green.length = 8;
105 	var->blue.offset = 24;
106 	var->blue.length = 8;
107 	var->transp.offset = 0;
108 	var->transp.length = 0;
109 
110 	if (fb_alloc_cmap(&info->cmap, 256, 0)) {
111 		printk(KERN_ERR "s3d: Cannot allocate color map.\n");
112 		return -ENOMEM;
113 	}
114 
115         return 0;
116 }
117 
s3d_pci_register(struct pci_dev * pdev,const struct pci_device_id * ent)118 static int __devinit s3d_pci_register(struct pci_dev *pdev,
119 				      const struct pci_device_id *ent)
120 {
121 	struct fb_info *info;
122 	struct s3d_info *sp;
123 	int err;
124 
125 	err = pci_enable_device(pdev);
126 	if (err < 0) {
127 		printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
128 		       pci_name(pdev));
129 		goto err_out;
130 	}
131 
132 	info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
133 	if (!info) {
134 		printk(KERN_ERR "s3d: Cannot allocate fb_info\n");
135 		err = -ENOMEM;
136 		goto err_disable;
137 	}
138 
139 	sp = info->par;
140 	sp->info = info;
141 	sp->pdev = pdev;
142 	sp->of_node = pci_device_to_OF_node(pdev);
143 	if (!sp->of_node) {
144 		printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
145 		       pci_name(pdev));
146 		err = -ENODEV;
147 		goto err_release_fb;
148 	}
149 
150 	sp->fb_base_phys = pci_resource_start (pdev, 1);
151 
152 	err = pci_request_region(pdev, 1, "s3d framebuffer");
153 	if (err < 0) {
154 		printk("s3d: Cannot request region 1 for %s\n",
155 		       pci_name(pdev));
156 		goto err_release_fb;
157 	}
158 
159 	err = s3d_get_props(sp);
160 	if (err)
161 		goto err_release_pci;
162 
163 	/* XXX 'linebytes' is often wrong, it is equal to the width
164 	 * XXX with depth of 32 on my XVR-2500 which is clearly not
165 	 * XXX right.  So we don't try to use it.
166 	 */
167 	switch (sp->depth) {
168 	case 8:
169 		info->fix.line_length = sp->width;
170 		break;
171 	case 16:
172 		info->fix.line_length = sp->width * 2;
173 		break;
174 	case 24:
175 		info->fix.line_length = sp->width * 3;
176 		break;
177 	case 32:
178 		info->fix.line_length = sp->width * 4;
179 		break;
180 	}
181 	sp->fb_size = info->fix.line_length * sp->height;
182 
183 	sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
184 	if (!sp->fb_base)
185 		goto err_release_pci;
186 
187 	err = s3d_set_fbinfo(sp);
188 	if (err)
189 		goto err_unmap_fb;
190 
191 	pci_set_drvdata(pdev, info);
192 
193 	printk("s3d: Found device at %s\n", pci_name(pdev));
194 
195 	err = register_framebuffer(info);
196 	if (err < 0) {
197 		printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
198 		       pci_name(pdev));
199 		goto err_unmap_fb;
200 	}
201 
202 	return 0;
203 
204 err_unmap_fb:
205 	iounmap(sp->fb_base);
206 
207 err_release_pci:
208 	pci_release_region(pdev, 1);
209 
210 err_release_fb:
211         framebuffer_release(info);
212 
213 err_disable:
214 	pci_disable_device(pdev);
215 
216 err_out:
217 	return err;
218 }
219 
s3d_pci_unregister(struct pci_dev * pdev)220 static void __devexit s3d_pci_unregister(struct pci_dev *pdev)
221 {
222 	struct fb_info *info = pci_get_drvdata(pdev);
223 	struct s3d_info *sp = info->par;
224 
225 	unregister_framebuffer(info);
226 
227 	iounmap(sp->fb_base);
228 
229 	pci_release_region(pdev, 1);
230 
231         framebuffer_release(info);
232 
233 	pci_disable_device(pdev);
234 }
235 
236 static struct pci_device_id s3d_pci_table[] = {
237 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c),	},
238 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d),	},
239 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e),	},
240 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f),	},
241 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030),	},
242 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031),	},
243 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032),	},
244 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033),	},
245 	{ 0, }
246 };
247 
248 static struct pci_driver s3d_driver = {
249 	.name		= "s3d",
250 	.id_table	= s3d_pci_table,
251 	.probe		= s3d_pci_register,
252 	.remove		= __devexit_p(s3d_pci_unregister),
253 };
254 
s3d_init(void)255 static int __init s3d_init(void)
256 {
257 	if (fb_get_options("s3d", NULL))
258 		return -ENODEV;
259 
260 	return pci_register_driver(&s3d_driver);
261 }
262 
s3d_exit(void)263 static void __exit s3d_exit(void)
264 {
265 	pci_unregister_driver(&s3d_driver);
266 }
267 
268 module_init(s3d_init);
269 module_exit(s3d_exit);
270 
271 MODULE_DESCRIPTION("framebuffer driver for Sun XVR-2500 graphics");
272 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
273 MODULE_VERSION("1.0");
274 MODULE_LICENSE("GPL");
275